#include <stdio.h>
#include <signal.h>
-#include "runtime.h"
+#include <errno.h>
+#include <string.h>
#include "sbcl.h"
+#include "runtime.h"
#include "os.h"
#include "interr.h"
#include "globals.h"
#include "validate.h"
#include "lispregs.h"
#include "arch.h"
+#include "fixnump.h"
#include "gc.h"
-#include "gencgc.h"
+#include "gc-internal.h"
+#include "thread.h"
+#include "genesis/vector.h"
+#include "genesis/weak-pointer.h"
+#include "genesis/simple-fun.h"
+#include "genesis/hash-table.h"
+
+/* forward declarations */
+long gc_find_freeish_pages(long *restart_page_ptr, long nbytes, int unboxed);
+static void gencgc_pickup_dynamic(void);
-/* a function defined externally in assembly language, called from
- * this file */
-void do_pending_interrupt(void);
\f
/*
* GC parameters
boolean enable_page_protection = 1;
/* Should we unmap a page and re-mmap it to have it zero filled? */
-#if defined(__FreeBSD__) || defined(__OpenBSD__)
+#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__)
/* comment from cmucl-2.4.8: This can waste a lot of swap on FreeBSD
* so don't unmap there.
*
#endif
/* the minimum size (in bytes) for a large object*/
-unsigned large_object_size = 4 * 4096;
+unsigned large_object_size = 4 * PAGE_BYTES;
+
\f
/*
* debugging
*/
-#define gc_abort() lose("GC invariant lost, file \"%s\", line %d", \
- __FILE__, __LINE__)
-/* FIXME: In CMU CL, this was "#if 0" with no explanation. Find out
- * how much it costs to make it "#if 1". If it's not too expensive,
- * keep it. */
-#if 1
-#define gc_assert(ex) do { \
- if (!(ex)) gc_abort(); \
-} while (0)
-#else
-#define gc_assert(ex)
-#endif
/* the verbosity level. All non-error messages are disabled at level 0;
* and only a few rare messages are printed at level 1. */
-unsigned gencgc_verbose = (QSHOW ? 1 : 0);
+#ifdef QSHOW
+unsigned gencgc_verbose = 1;
+#else
+unsigned gencgc_verbose = 0;
+#endif
/* FIXME: At some point enable the various error-checking things below
* and see what they say. */
/* the total bytes allocated. These are seen by Lisp DYNAMIC-USAGE. */
unsigned long bytes_allocated = 0;
-static unsigned long auto_gc_trigger = 0;
+extern unsigned long bytes_consed_between_gcs; /* gc-common.c */
+unsigned long auto_gc_trigger = 0;
/* the source and destination generations. These are set before a GC starts
* scavenging. */
-static int from_space;
-static int new_space;
+long from_space;
+long new_space;
-/* FIXME: It would be nice to use this symbolic constant instead of
- * bare 4096 almost everywhere. We could also use an assertion that
- * it's equal to getpagesize(). */
-#define PAGE_BYTES 4096
/* An array of page structures is statically allocated.
* This helps quickly map between an address its page structure.
* is needed. */
static void *heap_base = NULL;
+#if N_WORD_BITS == 32
+ #define SIMPLE_ARRAY_WORD_WIDETAG SIMPLE_ARRAY_UNSIGNED_BYTE_32_WIDETAG
+#elif N_WORD_BITS == 64
+ #define SIMPLE_ARRAY_WORD_WIDETAG SIMPLE_ARRAY_UNSIGNED_BYTE_64_WIDETAG
+#endif
+
/* Calculate the start address for the given page number. */
inline void *
-page_address(int page_num)
+page_address(long page_num)
{
- return (heap_base + (page_num * 4096));
+ return (heap_base + (page_num * PAGE_BYTES));
}
/* Find the page index within the page_table for the given
* address. Return -1 on failure. */
-inline int
+inline long
find_page_index(void *addr)
{
- int index = addr-heap_base;
+ long index = addr-heap_base;
if (index >= 0) {
- index = ((unsigned int)index)/4096;
+ index = ((unsigned long)index)/PAGE_BYTES;
if (index < NUM_PAGES)
return (index);
}
struct generation {
/* the first page that gc_alloc() checks on its next call */
- int alloc_start_page;
+ long alloc_start_page;
/* the first page that gc_alloc_unboxed() checks on its next call */
- int alloc_unboxed_start_page;
+ long alloc_unboxed_start_page;
/* the first page that gc_alloc_large (boxed) considers on its next
* call. (Although it always allocates after the boxed_region.) */
- int alloc_large_start_page;
+ long alloc_large_start_page;
/* the first page that gc_alloc_large (unboxed) considers on its
* next call. (Although it always allocates after the
* current_unboxed_region.) */
- int alloc_large_unboxed_start_page;
+ long alloc_large_unboxed_start_page;
/* the bytes allocated to this generation */
- int bytes_allocated;
+ long bytes_allocated;
/* the number of bytes at which to trigger a GC */
- int gc_trigger;
+ long gc_trigger;
/* to calculate a new level for gc_trigger */
- int bytes_consed_between_gc;
+ long bytes_consed_between_gc;
/* the number of GCs since the last raise */
int num_gc;
* objects are added from a GC of a younger generation. Dividing by
* the bytes_allocated will give the average age of the memory in
* this generation since its last GC. */
- int cum_sum_bytes_allocated;
+ long cum_sum_bytes_allocated;
/* a minimum average memory age before a GC will occur helps
* prevent a GC when a large number of new live objects have been
* added, in which case a GC could be a waste of time */
double min_av_mem_age;
};
+/* the number of actual generations. (The number of 'struct
+ * generation' objects is one more than this, because one object
+ * serves as scratch when GC'ing.) */
+#define NUM_GENERATIONS 6
/* an array of generation structures. There needs to be one more
* generation structure than actual generations as the oldest
* generation is temporarily raised then lowered. */
-static struct generation generations[NUM_GENERATIONS+1];
+struct generation generations[NUM_GENERATIONS+1];
/* the oldest generation that is will currently be GCed by default.
* Valid values are: 0, 1, ... (NUM_GENERATIONS-1)
* ALLOCATION_POINTER which is used by the room function to limit its
* search of the heap. XX Gencgc obviously needs to be better
* integrated with the Lisp code. */
-static int last_free_page;
-static int last_used_page = 0;
+static long last_free_page;
+\f
+/* This lock is to prevent multiple threads from simultaneously
+ * allocating new regions which overlap each other. Note that the
+ * majority of GC is single-threaded, but alloc() may be called from
+ * >1 thread at a time and must be thread-safe. This lock must be
+ * seized before all accesses to generations[] or to parts of
+ * page_table[] that other threads may want to see */
+
+static lispobj free_pages_lock=0;
+
\f
/*
* miscellaneous heap functions
/* Count the number of pages which are write-protected within the
* given generation. */
-static int
+static long
count_write_protect_generation_pages(int generation)
{
- int i;
- int count = 0;
+ long i;
+ long count = 0;
for (i = 0; i < last_free_page; i++)
- if ((page_table[i].allocated != FREE_PAGE)
+ if ((page_table[i].allocated != FREE_PAGE_FLAG)
&& (page_table[i].gen == generation)
&& (page_table[i].write_protected == 1))
count++;
}
/* Count the number of pages within the given generation. */
-static int
+static long
count_generation_pages(int generation)
{
- int i;
- int count = 0;
+ long i;
+ long count = 0;
for (i = 0; i < last_free_page; i++)
if ((page_table[i].allocated != 0)
return count;
}
-/* Count the number of dont_move pages. */
-static int
+#ifdef QSHOW
+static long
count_dont_move_pages(void)
{
- int i;
- int count = 0;
+ long i;
+ long count = 0;
for (i = 0; i < last_free_page; i++) {
if ((page_table[i].allocated != 0) && (page_table[i].dont_move != 0)) {
++count;
}
return count;
}
+#endif /* QSHOW */
/* Work through the pages and add up the number of bytes used for the
* given generation. */
-static int
+static long
count_generation_bytes_allocated (int gen)
{
- int i;
- int result = 0;
+ long i;
+ long result = 0;
for (i = 0; i < last_free_page; i++) {
if ((page_table[i].allocated != 0) && (page_table[i].gen == gen))
result += page_table[i].bytes_used;
/ ((double)generations[gen].bytes_allocated);
}
+void fpu_save(int *); /* defined in x86-assem.S */
+void fpu_restore(int *); /* defined in x86-assem.S */
/* The verbose argument controls how much to print: 0 for normal
* level of detail; 1 for debugging. */
static void
/* Print the heap stats. */
fprintf(stderr,
- " Generation Boxed Unboxed LB LUB Alloc Waste Trig WP GCs Mem-age\n");
+ " Gen Boxed Unboxed LB LUB !move Alloc Waste Trig WP GCs Mem-age\n");
for (i = 0; i < gens; i++) {
int j;
int unboxed_cnt = 0;
int large_boxed_cnt = 0;
int large_unboxed_cnt = 0;
+ int pinned_cnt=0;
for (j = 0; j < last_free_page; j++)
if (page_table[j].gen == i) {
/* Count the number of boxed pages within the given
* generation. */
- if (page_table[j].allocated == BOXED_PAGE) {
+ if (page_table[j].allocated & BOXED_PAGE_FLAG) {
if (page_table[j].large_object)
large_boxed_cnt++;
else
boxed_cnt++;
}
-
+ if(page_table[j].dont_move) pinned_cnt++;
/* Count the number of unboxed pages within the given
* generation. */
- if (page_table[j].allocated == UNBOXED_PAGE) {
+ if (page_table[j].allocated & UNBOXED_PAGE_FLAG) {
if (page_table[j].large_object)
large_unboxed_cnt++;
else
gc_assert(generations[i].bytes_allocated
== count_generation_bytes_allocated(i));
fprintf(stderr,
- " %8d: %5d %5d %5d %5d %8d %5d %8d %4d %3d %7.4f\n",
+ " %1d: %5d %5d %5d %5d %5d %8ld %5ld %8ld %4ld %3d %7.4f\n",
i,
boxed_cnt, unboxed_cnt, large_boxed_cnt, large_unboxed_cnt,
+ pinned_cnt,
generations[i].bytes_allocated,
- (count_generation_pages(i)*4096
+ (count_generation_pages(i)*PAGE_BYTES
- generations[i].bytes_allocated),
generations[i].gc_trigger,
count_write_protect_generation_pages(i),
* e.g. boxed/unboxed, generation, ages; there may need to be many
* allocation regions.
*
- * Each allocation region may be start within a partly used page. Many
+ * Each allocation region may start within a partly used page. Many
* features of memory use are noted on a page wise basis, e.g. the
* generation; so if a region starts within an existing allocated page
* it must be consistent with this page.
struct alloc_region boxed_region;
struct alloc_region unboxed_region;
-/* XX hack. Current Lisp code uses the following. Need copying in/out. */
-void *current_region_free_pointer;
-void *current_region_end_addr;
-
/* The generation currently being allocated to. */
static int gc_alloc_generation;
* are allocated, although they will initially be empty.
*/
static void
-gc_alloc_new_region(int nbytes, int unboxed, struct alloc_region *alloc_region)
+gc_alloc_new_region(long nbytes, int unboxed, struct alloc_region *alloc_region)
{
- int first_page;
- int last_page;
- int region_size;
- int restart_page;
- int bytes_found;
- int num_pages;
- int i;
+ long first_page;
+ long last_page;
+ long bytes_found;
+ long i;
/*
FSHOW((stderr,
gc_assert((alloc_region->first_page == 0)
&& (alloc_region->last_page == -1)
&& (alloc_region->free_pointer == alloc_region->end_addr));
-
+ get_spinlock(&free_pages_lock,(long) alloc_region);
if (unboxed) {
- restart_page =
+ first_page =
generations[gc_alloc_generation].alloc_unboxed_start_page;
} else {
- restart_page =
+ first_page =
generations[gc_alloc_generation].alloc_start_page;
}
-
- /* Search for a contiguous free region of at least nbytes with the
- * given properties: boxed/unboxed, generation. */
- do {
- first_page = restart_page;
-
- /* First search for a page with at least 32 bytes free, which is
- * not write-protected, and which is not marked dont_move.
- *
- * FIXME: This looks extremely similar, perhaps identical, to
- * code in gc_alloc_large(). It should be shared somehow. */
- while ((first_page < NUM_PAGES)
- && (page_table[first_page].allocated != FREE_PAGE) /* not free page */
- && ((unboxed &&
- (page_table[first_page].allocated != UNBOXED_PAGE))
- || (!unboxed &&
- (page_table[first_page].allocated != BOXED_PAGE))
- || (page_table[first_page].large_object != 0)
- || (page_table[first_page].gen != gc_alloc_generation)
- || (page_table[first_page].bytes_used >= (4096-32))
- || (page_table[first_page].write_protected != 0)
- || (page_table[first_page].dont_move != 0)))
- first_page++;
- /* Check for a failure. */
- if (first_page >= NUM_PAGES) {
- fprintf(stderr,
- "Argh! gc_alloc_new_region failed on first_page, nbytes=%d.\n",
- nbytes);
- print_generation_stats(1);
- lose(NULL);
- }
-
- gc_assert(page_table[first_page].write_protected == 0);
-
- /*
- FSHOW((stderr,
- "/first_page=%d bytes_used=%d\n",
- first_page, page_table[first_page].bytes_used));
- */
-
- /* Now search forward to calculate the available region size. It
- * tries to keeps going until nbytes are found and the number of
- * pages is greater than some level. This helps keep down the
- * number of pages in a region. */
- last_page = first_page;
- bytes_found = 4096 - page_table[first_page].bytes_used;
- num_pages = 1;
- while (((bytes_found < nbytes) || (num_pages < 2))
- && (last_page < (NUM_PAGES-1))
- && (page_table[last_page+1].allocated == FREE_PAGE)) {
- last_page++;
- num_pages++;
- bytes_found += 4096;
- gc_assert(page_table[last_page].write_protected == 0);
- }
-
- region_size = (4096 - page_table[first_page].bytes_used)
- + 4096*(last_page-first_page);
-
- gc_assert(bytes_found == region_size);
-
- /*
- FSHOW((stderr,
- "/last_page=%d bytes_found=%d num_pages=%d\n",
- last_page, bytes_found, num_pages));
- */
-
- restart_page = last_page + 1;
- } while ((restart_page < NUM_PAGES) && (bytes_found < nbytes));
-
- /* Check for a failure. */
- if ((restart_page >= NUM_PAGES) && (bytes_found < nbytes)) {
- fprintf(stderr,
- "Argh! gc_alloc_new_region() failed on restart_page, nbytes=%d.\n",
- nbytes);
- print_generation_stats(1);
- lose(NULL);
- }
-
- /*
- FSHOW((stderr,
- "/gc_alloc_new_region() gen %d: %d bytes: pages %d to %d: addr=%x\n",
- gc_alloc_generation,
- bytes_found,
- first_page,
- last_page,
- page_address(first_page)));
- */
+ last_page=gc_find_freeish_pages(&first_page,nbytes,unboxed);
+ bytes_found=(PAGE_BYTES - page_table[first_page].bytes_used)
+ + PAGE_BYTES*(last_page-first_page);
/* Set up the alloc_region. */
alloc_region->first_page = first_page;
alloc_region->free_pointer = alloc_region->start_addr;
alloc_region->end_addr = alloc_region->start_addr + bytes_found;
- if (gencgc_zero_check) {
- int *p;
- for (p = (int *)alloc_region->start_addr;
- p < (int *)alloc_region->end_addr; p++) {
- if (*p != 0) {
- /* KLUDGE: It would be nice to use %lx and explicit casts
- * (long) in code like this, so that it is less likely to
- * break randomly when running on a machine with different
- * word sizes. -- WHN 19991129 */
- lose("The new region at %x is not zero.", p);
- }
- }
- }
-
/* Set up the pages. */
/* The first page may have already been in use. */
if (page_table[first_page].bytes_used == 0) {
if (unboxed)
- page_table[first_page].allocated = UNBOXED_PAGE;
+ page_table[first_page].allocated = UNBOXED_PAGE_FLAG;
else
- page_table[first_page].allocated = BOXED_PAGE;
+ page_table[first_page].allocated = BOXED_PAGE_FLAG;
page_table[first_page].gen = gc_alloc_generation;
page_table[first_page].large_object = 0;
page_table[first_page].first_object_offset = 0;
}
if (unboxed)
- gc_assert(page_table[first_page].allocated == UNBOXED_PAGE);
+ gc_assert(page_table[first_page].allocated == UNBOXED_PAGE_FLAG);
else
- gc_assert(page_table[first_page].allocated == BOXED_PAGE);
+ gc_assert(page_table[first_page].allocated == BOXED_PAGE_FLAG);
+ page_table[first_page].allocated |= OPEN_REGION_PAGE_FLAG;
+
gc_assert(page_table[first_page].gen == gc_alloc_generation);
gc_assert(page_table[first_page].large_object == 0);
for (i = first_page+1; i <= last_page; i++) {
if (unboxed)
- page_table[i].allocated = UNBOXED_PAGE;
+ page_table[i].allocated = UNBOXED_PAGE_FLAG;
else
- page_table[i].allocated = BOXED_PAGE;
+ page_table[i].allocated = BOXED_PAGE_FLAG;
page_table[i].gen = gc_alloc_generation;
page_table[i].large_object = 0;
/* This may not be necessary for unboxed regions (think it was
* broken before!) */
page_table[i].first_object_offset =
alloc_region->start_addr - page_address(i);
+ page_table[i].allocated |= OPEN_REGION_PAGE_FLAG ;
}
-
/* Bump up last_free_page. */
if (last_page+1 > last_free_page) {
last_free_page = last_page+1;
SetSymbolValue(ALLOCATION_POINTER,
- (lispobj)(((char *)heap_base) + last_free_page*4096));
- if (last_page+1 > last_used_page)
- last_used_page = last_page+1;
+ (lispobj)(((char *)heap_base) + last_free_page*PAGE_BYTES),
+ 0);
+ }
+ release_spinlock(&free_pages_lock);
+
+ /* we can do this after releasing free_pages_lock */
+ if (gencgc_zero_check) {
+ long *p;
+ for (p = (long *)alloc_region->start_addr;
+ p < (long *)alloc_region->end_addr; p++) {
+ if (*p != 0) {
+ /* KLUDGE: It would be nice to use %lx and explicit casts
+ * (long) in code like this, so that it is less likely to
+ * break randomly when running on a machine with different
+ * word sizes. -- WHN 19991129 */
+ lose("The new region at %x is not zero.", p);
+ }
}
}
+}
+
/* If the record_new_objects flag is 2 then all new regions created
* are recorded.
*
* scavenge of a generation. */
#define NUM_NEW_AREAS 512
static int record_new_objects = 0;
-static int new_areas_ignore_page;
+static long new_areas_ignore_page;
struct new_area {
- int page;
- int offset;
- int size;
+ long page;
+ long offset;
+ long size;
};
static struct new_area (*new_areas)[];
-static int new_areas_index;
-int max_new_areas;
+static long new_areas_index;
+long max_new_areas;
/* Add a new area to new_areas. */
static void
-add_new_area(int first_page, int offset, int size)
+add_new_area(long first_page, long offset, long size)
{
unsigned new_area_start,c;
- int i;
+ long i;
/* Ignore if full. */
if (new_areas_index >= NUM_NEW_AREAS)
gc_abort();
}
- new_area_start = 4096*first_page + offset;
+ new_area_start = PAGE_BYTES*first_page + offset;
/* Search backwards for a prior area that this follows from. If
found this will save adding a new area. */
for (i = new_areas_index-1, c = 0; (i >= 0) && (c < 8); i--, c++) {
unsigned area_end =
- 4096*((*new_areas)[i].page)
+ PAGE_BYTES*((*new_areas)[i].page)
+ (*new_areas)[i].offset
+ (*new_areas)[i].size;
/*FSHOW((stderr,
(*new_areas)[i].size,
first_page,
offset,
- size));*/
+ size);*/
(*new_areas)[i].size += size;
return;
}
}
- /*FSHOW((stderr, "/add_new_area S1 %d %d %d\n", i, c, new_area_start));*/
(*new_areas)[new_areas_index].page = first_page;
(*new_areas)[new_areas_index].offset = offset;
max_new_areas = new_areas_index;
}
-/* Update the tables for the alloc_region. The region maybe added to
+/* Update the tables for the alloc_region. The region may be added to
* the new_areas.
*
* When done the alloc_region is set up so that the next quick alloc
void
gc_alloc_update_page_tables(int unboxed, struct alloc_region *alloc_region)
{
- int more;
- int first_page;
- int next_page;
- int bytes_used;
- int orig_first_page_bytes_used;
- int region_size;
- int byte_cnt;
+ long more;
+ long first_page;
+ long next_page;
+ long bytes_used;
+ long orig_first_page_bytes_used;
+ long region_size;
+ long byte_cnt;
- /*
- FSHOW((stderr,
- "/gc_alloc_update_page_tables() to gen %d:\n",
- gc_alloc_generation));
- */
first_page = alloc_region->first_page;
next_page = first_page+1;
- /* Skip if no bytes were allocated. */
+ get_spinlock(&free_pages_lock,(long) alloc_region);
if (alloc_region->free_pointer != alloc_region->start_addr) {
+ /* some bytes were allocated in the region */
orig_first_page_bytes_used = page_table[first_page].bytes_used;
gc_assert(alloc_region->start_addr == (page_address(first_page) + page_table[first_page].bytes_used));
* first_object_offset. */
if (page_table[first_page].bytes_used == 0)
gc_assert(page_table[first_page].first_object_offset == 0);
+ page_table[first_page].allocated &= ~(OPEN_REGION_PAGE_FLAG);
if (unboxed)
- gc_assert(page_table[first_page].allocated == UNBOXED_PAGE);
+ gc_assert(page_table[first_page].allocated == UNBOXED_PAGE_FLAG);
else
- gc_assert(page_table[first_page].allocated == BOXED_PAGE);
+ gc_assert(page_table[first_page].allocated == BOXED_PAGE_FLAG);
gc_assert(page_table[first_page].gen == gc_alloc_generation);
gc_assert(page_table[first_page].large_object == 0);
/* Calculate the number of bytes used in this page. This is not
* always the number of new bytes, unless it was free. */
more = 0;
- if ((bytes_used = (alloc_region->free_pointer - page_address(first_page)))>4096) {
- bytes_used = 4096;
+ if ((bytes_used = (alloc_region->free_pointer - page_address(first_page)))>PAGE_BYTES) {
+ bytes_used = PAGE_BYTES;
more = 1;
}
page_table[first_page].bytes_used = bytes_used;
* first_object_offset pointer to the start of the region, and set
* the bytes_used. */
while (more) {
+ page_table[next_page].allocated &= ~(OPEN_REGION_PAGE_FLAG);
if (unboxed)
- gc_assert(page_table[next_page].allocated == UNBOXED_PAGE);
+ gc_assert(page_table[next_page].allocated==UNBOXED_PAGE_FLAG);
else
- gc_assert(page_table[next_page].allocated == BOXED_PAGE);
+ gc_assert(page_table[next_page].allocated == BOXED_PAGE_FLAG);
gc_assert(page_table[next_page].bytes_used == 0);
gc_assert(page_table[next_page].gen == gc_alloc_generation);
gc_assert(page_table[next_page].large_object == 0);
/* Calculate the number of bytes used in this page. */
more = 0;
if ((bytes_used = (alloc_region->free_pointer
- - page_address(next_page)))>4096) {
- bytes_used = 4096;
+ - page_address(next_page)))>PAGE_BYTES) {
+ bytes_used = PAGE_BYTES;
more = 1;
}
page_table[next_page].bytes_used = bytes_used;
} else {
/* There are no bytes allocated. Unallocate the first_page if
* there are 0 bytes_used. */
+ page_table[first_page].allocated &= ~(OPEN_REGION_PAGE_FLAG);
if (page_table[first_page].bytes_used == 0)
- page_table[first_page].allocated = FREE_PAGE;
+ page_table[first_page].allocated = FREE_PAGE_FLAG;
}
/* Unallocate any unused pages. */
while (next_page <= alloc_region->last_page) {
gc_assert(page_table[next_page].bytes_used == 0);
- page_table[next_page].allocated = FREE_PAGE;
+ page_table[next_page].allocated = FREE_PAGE_FLAG;
next_page++;
}
-
- /* Reset the alloc_region. */
- alloc_region->first_page = 0;
- alloc_region->last_page = -1;
- alloc_region->start_addr = page_address(0);
- alloc_region->free_pointer = page_address(0);
- alloc_region->end_addr = page_address(0);
+ release_spinlock(&free_pages_lock);
+ /* alloc_region is per-thread, we're ok to do this unlocked */
+ gc_set_region_empty(alloc_region);
}
-static inline void *gc_quick_alloc(int nbytes);
+static inline void *gc_quick_alloc(long nbytes);
/* Allocate a possibly large object. */
-static void *
-gc_alloc_large(int nbytes, int unboxed, struct alloc_region *alloc_region)
+void *
+gc_alloc_large(long nbytes, int unboxed, struct alloc_region *alloc_region)
{
- int first_page;
- int last_page;
- int region_size;
- int restart_page;
- int bytes_found;
- int num_pages;
- int orig_first_page_bytes_used;
- int byte_cnt;
- int more;
- int bytes_used;
- int next_page;
- int large = (nbytes >= large_object_size);
-
- /*
- if (nbytes > 200000)
- FSHOW((stderr, "/alloc_large %d\n", nbytes));
- */
+ long first_page;
+ long last_page;
+ long orig_first_page_bytes_used;
+ long byte_cnt;
+ long more;
+ long bytes_used;
+ long next_page;
- /*
- FSHOW((stderr,
- "/gc_alloc_large() for %d bytes from gen %d\n",
- nbytes, gc_alloc_generation));
- */
+ get_spinlock(&free_pages_lock,(long) alloc_region);
- /* If the object is small, and there is room in the current region
- then allocation it in the current region. */
- if (!large
- && ((alloc_region->end_addr-alloc_region->free_pointer) >= nbytes))
- return gc_quick_alloc(nbytes);
-
- /* Search for a contiguous free region of at least nbytes. If it's a
- large object then align it on a page boundary by searching for a
- free page. */
-
- /* To allow the allocation of small objects without the danger of
- using a page in the current boxed region, the search starts after
- the current boxed free region. XX could probably keep a page
- index ahead of the current region and bumped up here to save a
- lot of re-scanning. */
if (unboxed) {
- restart_page =
+ first_page =
generations[gc_alloc_generation].alloc_large_unboxed_start_page;
} else {
- restart_page = generations[gc_alloc_generation].alloc_large_start_page;
- }
- if (restart_page <= alloc_region->last_page) {
- restart_page = alloc_region->last_page+1;
+ first_page = generations[gc_alloc_generation].alloc_large_start_page;
}
-
- do {
- first_page = restart_page;
-
- if (large)
- while ((first_page < NUM_PAGES)
- && (page_table[first_page].allocated != FREE_PAGE))
- first_page++;
- else
- /* FIXME: This looks extremely similar, perhaps identical,
- * to code in gc_alloc_new_region(). It should be shared
- * somehow. */
- while ((first_page < NUM_PAGES)
- && (page_table[first_page].allocated != FREE_PAGE)
- && ((unboxed &&
- (page_table[first_page].allocated != UNBOXED_PAGE))
- || (!unboxed &&
- (page_table[first_page].allocated != BOXED_PAGE))
- || (page_table[first_page].large_object != 0)
- || (page_table[first_page].gen != gc_alloc_generation)
- || (page_table[first_page].bytes_used >= (4096-32))
- || (page_table[first_page].write_protected != 0)
- || (page_table[first_page].dont_move != 0)))
- first_page++;
-
- if (first_page >= NUM_PAGES) {
- fprintf(stderr,
- "Argh! gc_alloc_large failed (first_page), nbytes=%d.\n",
- nbytes);
- print_generation_stats(1);
- lose(NULL);
- }
-
- gc_assert(page_table[first_page].write_protected == 0);
-
- /*
- FSHOW((stderr,
- "/first_page=%d bytes_used=%d\n",
- first_page, page_table[first_page].bytes_used));
- */
-
- last_page = first_page;
- bytes_found = 4096 - page_table[first_page].bytes_used;
- num_pages = 1;
- while ((bytes_found < nbytes)
- && (last_page < (NUM_PAGES-1))
- && (page_table[last_page+1].allocated == FREE_PAGE)) {
- last_page++;
- num_pages++;
- bytes_found += 4096;
- gc_assert(page_table[last_page].write_protected == 0);
- }
-
- region_size = (4096 - page_table[first_page].bytes_used)
- + 4096*(last_page-first_page);
-
- gc_assert(bytes_found == region_size);
-
- /*
- FSHOW((stderr,
- "/last_page=%d bytes_found=%d num_pages=%d\n",
- last_page, bytes_found, num_pages));
- */
-
- restart_page = last_page + 1;
- } while ((restart_page < NUM_PAGES) && (bytes_found < nbytes));
-
- /* Check for a failure */
- if ((restart_page >= NUM_PAGES) && (bytes_found < nbytes)) {
- fprintf(stderr,
- "Argh! gc_alloc_large failed (restart_page), nbytes=%d.\n",
- nbytes);
- print_generation_stats(1);
- lose(NULL);
+ if (first_page <= alloc_region->last_page) {
+ first_page = alloc_region->last_page+1;
}
- /*
- if (large)
- FSHOW((stderr,
- "/gc_alloc_large() gen %d: %d of %d bytes: from pages %d to %d: addr=%x\n",
- gc_alloc_generation,
- nbytes,
- bytes_found,
- first_page,
- last_page,
- page_address(first_page)));
- */
+ last_page=gc_find_freeish_pages(&first_page,nbytes,unboxed);
gc_assert(first_page > alloc_region->last_page);
if (unboxed)
* first_object_offset. */
if (page_table[first_page].bytes_used == 0) {
if (unboxed)
- page_table[first_page].allocated = UNBOXED_PAGE;
+ page_table[first_page].allocated = UNBOXED_PAGE_FLAG;
else
- page_table[first_page].allocated = BOXED_PAGE;
+ page_table[first_page].allocated = BOXED_PAGE_FLAG;
page_table[first_page].gen = gc_alloc_generation;
page_table[first_page].first_object_offset = 0;
- page_table[first_page].large_object = large;
+ page_table[first_page].large_object = 1;
}
if (unboxed)
- gc_assert(page_table[first_page].allocated == UNBOXED_PAGE);
+ gc_assert(page_table[first_page].allocated == UNBOXED_PAGE_FLAG);
else
- gc_assert(page_table[first_page].allocated == BOXED_PAGE);
+ gc_assert(page_table[first_page].allocated == BOXED_PAGE_FLAG);
gc_assert(page_table[first_page].gen == gc_alloc_generation);
- gc_assert(page_table[first_page].large_object == large);
+ gc_assert(page_table[first_page].large_object == 1);
byte_cnt = 0;
/* Calc. the number of bytes used in this page. This is not
* always the number of new bytes, unless it was free. */
more = 0;
- if ((bytes_used = nbytes+orig_first_page_bytes_used) > 4096) {
- bytes_used = 4096;
+ if ((bytes_used = nbytes+orig_first_page_bytes_used) > PAGE_BYTES) {
+ bytes_used = PAGE_BYTES;
more = 1;
}
page_table[first_page].bytes_used = bytes_used;
* first_object_offset pointer to the start of the region, and
* set the bytes_used. */
while (more) {
- gc_assert(page_table[next_page].allocated == FREE_PAGE);
+ gc_assert(page_table[next_page].allocated == FREE_PAGE_FLAG);
gc_assert(page_table[next_page].bytes_used == 0);
if (unboxed)
- page_table[next_page].allocated = UNBOXED_PAGE;
+ page_table[next_page].allocated = UNBOXED_PAGE_FLAG;
else
- page_table[next_page].allocated = BOXED_PAGE;
+ page_table[next_page].allocated = BOXED_PAGE_FLAG;
page_table[next_page].gen = gc_alloc_generation;
- page_table[next_page].large_object = large;
+ page_table[next_page].large_object = 1;
page_table[next_page].first_object_offset =
- orig_first_page_bytes_used - 4096*(next_page-first_page);
+ orig_first_page_bytes_used - PAGE_BYTES*(next_page-first_page);
/* Calculate the number of bytes used in this page. */
more = 0;
- if ((bytes_used=(nbytes+orig_first_page_bytes_used)-byte_cnt) > 4096) {
- bytes_used = 4096;
+ if ((bytes_used=(nbytes+orig_first_page_bytes_used)-byte_cnt) > PAGE_BYTES) {
+ bytes_used = PAGE_BYTES;
more = 1;
}
page_table[next_page].bytes_used = bytes_used;
+ page_table[next_page].write_protected=0;
+ page_table[next_page].dont_move=0;
byte_cnt += bytes_used;
-
next_page++;
}
if (last_page+1 > last_free_page) {
last_free_page = last_page+1;
SetSymbolValue(ALLOCATION_POINTER,
- (lispobj)(((char *)heap_base) + last_free_page*4096));
- if (last_page+1 > last_used_page)
- last_used_page = last_page+1;
+ (lispobj)(((char *)heap_base) + last_free_page*PAGE_BYTES),0);
}
+ release_spinlock(&free_pages_lock);
return((void *)(page_address(first_page)+orig_first_page_bytes_used));
}
-/* Allocate bytes from the boxed_region. First checks whether there is
- * room. If not then call gc_alloc_new_region() to find a new region
- * with enough space. Return a pointer to the start of the region. */
-static void *
-gc_alloc(int nbytes)
+long
+gc_find_freeish_pages(long *restart_page_ptr, long nbytes, int unboxed)
{
- void *new_free_pointer;
+ long first_page;
+ long last_page;
+ long region_size;
+ long restart_page=*restart_page_ptr;
+ long bytes_found;
+ long num_pages;
+ long large_p=(nbytes>=large_object_size);
+ gc_assert(free_pages_lock);
- /* FSHOW((stderr, "/gc_alloc %d\n", nbytes)); */
+ /* Search for a contiguous free space of at least nbytes. If it's
+ * a large object then align it on a page boundary by searching
+ * for a free page. */
- /* Check whether there is room in the current alloc region. */
- new_free_pointer = boxed_region.free_pointer + nbytes;
+ do {
+ first_page = restart_page;
+ if (large_p)
+ while ((first_page < NUM_PAGES)
+ && (page_table[first_page].allocated != FREE_PAGE_FLAG))
+ first_page++;
+ else
+ while (first_page < NUM_PAGES) {
+ if(page_table[first_page].allocated == FREE_PAGE_FLAG)
+ break;
+ if((page_table[first_page].allocated ==
+ (unboxed ? UNBOXED_PAGE_FLAG : BOXED_PAGE_FLAG)) &&
+ (page_table[first_page].large_object == 0) &&
+ (page_table[first_page].gen == gc_alloc_generation) &&
+ (page_table[first_page].bytes_used < (PAGE_BYTES-32)) &&
+ (page_table[first_page].write_protected == 0) &&
+ (page_table[first_page].dont_move == 0)) {
+ break;
+ }
+ first_page++;
+ }
+
+ if (first_page >= NUM_PAGES) {
+ fprintf(stderr,
+ "Argh! gc_find_free_space failed (first_page), nbytes=%ld.\n",
+ nbytes);
+ print_generation_stats(1);
+ lose(NULL);
+ }
- if (new_free_pointer <= boxed_region.end_addr) {
- /* If so then allocate from the current alloc region. */
- void *new_obj = boxed_region.free_pointer;
- boxed_region.free_pointer = new_free_pointer;
+ gc_assert(page_table[first_page].write_protected == 0);
- /* Check whether the alloc region is almost empty. */
- if ((boxed_region.end_addr - boxed_region.free_pointer) <= 32) {
- /* If so finished with the current region. */
- gc_alloc_update_page_tables(0, &boxed_region);
- /* Set up a new region. */
- gc_alloc_new_region(32, 0, &boxed_region);
+ last_page = first_page;
+ bytes_found = PAGE_BYTES - page_table[first_page].bytes_used;
+ num_pages = 1;
+ while (((bytes_found < nbytes)
+ || (!large_p && (num_pages < 2)))
+ && (last_page < (NUM_PAGES-1))
+ && (page_table[last_page+1].allocated == FREE_PAGE_FLAG)) {
+ last_page++;
+ num_pages++;
+ bytes_found += PAGE_BYTES;
+ gc_assert(page_table[last_page].write_protected == 0);
}
- return((void *)new_obj);
- }
-
- /* Else not enough free space in the current region. */
- /* If there some room left in the current region, enough to be worth
- * saving, then allocate a large object. */
- /* FIXME: "32" should be a named parameter. */
- if ((boxed_region.end_addr-boxed_region.free_pointer) > 32)
- return gc_alloc_large(nbytes, 0, &boxed_region);
+ region_size = (PAGE_BYTES - page_table[first_page].bytes_used)
+ + PAGE_BYTES*(last_page-first_page);
- /* Else find a new region. */
+ gc_assert(bytes_found == region_size);
+ restart_page = last_page + 1;
+ } while ((restart_page < NUM_PAGES) && (bytes_found < nbytes));
- /* Finished with the current region. */
- gc_alloc_update_page_tables(0, &boxed_region);
+ /* Check for a failure */
+ if ((restart_page >= NUM_PAGES) && (bytes_found < nbytes)) {
+ fprintf(stderr,
+ "Argh! gc_find_freeish_pages failed (restart_page), nbytes=%ld.\n",
+ nbytes);
+ print_generation_stats(1);
+ lose(NULL);
+ }
+ *restart_page_ptr=first_page;
+ return last_page;
+}
- /* Set up a new region. */
- gc_alloc_new_region(nbytes, 0, &boxed_region);
+/* Allocate bytes. All the rest of the special-purpose allocation
+ * functions will eventually call this */
- /* Should now be enough room. */
+void *
+gc_alloc_with_region(long nbytes,int unboxed_p, struct alloc_region *my_region,
+ int quick_p)
+{
+ void *new_free_pointer;
- /* Check whether there is room in the current region. */
- new_free_pointer = boxed_region.free_pointer + nbytes;
+ if(nbytes>=large_object_size)
+ return gc_alloc_large(nbytes,unboxed_p,my_region);
- if (new_free_pointer <= boxed_region.end_addr) {
- /* If so then allocate from the current region. */
- void *new_obj = boxed_region.free_pointer;
- boxed_region.free_pointer = new_free_pointer;
+ /* Check whether there is room in the current alloc region. */
+ new_free_pointer = my_region->free_pointer + nbytes;
- /* Check whether the current region is almost empty. */
- if ((boxed_region.end_addr - boxed_region.free_pointer) <= 32) {
- /* If so find, finished with the current region. */
- gc_alloc_update_page_tables(0, &boxed_region);
+ /* fprintf(stderr, "alloc %d bytes from %p to %p\n", nbytes,
+ my_region->free_pointer, new_free_pointer); */
+ if (new_free_pointer <= my_region->end_addr) {
+ /* If so then allocate from the current alloc region. */
+ void *new_obj = my_region->free_pointer;
+ my_region->free_pointer = new_free_pointer;
+
+ /* Unless a `quick' alloc was requested, check whether the
+ alloc region is almost empty. */
+ if (!quick_p &&
+ (my_region->end_addr - my_region->free_pointer) <= 32) {
+ /* If so, finished with the current region. */
+ gc_alloc_update_page_tables(unboxed_p, my_region);
/* Set up a new region. */
- gc_alloc_new_region(32, 0, &boxed_region);
+ gc_alloc_new_region(32 /*bytes*/, unboxed_p, my_region);
}
return((void *)new_obj);
}
- /* shouldn't happen */
- gc_assert(0);
- return((void *) NIL); /* dummy value: return something ... */
-}
+ /* Else not enough free space in the current region: retry with a
+ * new region. */
-/* Allocate space from the boxed_region. If there is not enough free
- * space then call gc_alloc to do the job. A pointer to the start of
- * the region is returned. */
-static inline void *
-gc_quick_alloc(int nbytes)
-{
- void *new_free_pointer;
+ gc_alloc_update_page_tables(unboxed_p, my_region);
+ gc_alloc_new_region(nbytes, unboxed_p, my_region);
+ return gc_alloc_with_region(nbytes,unboxed_p,my_region,0);
+}
- /* Check whether there is room in the current region. */
- new_free_pointer = boxed_region.free_pointer + nbytes;
+/* these are only used during GC: all allocation from the mutator calls
+ * alloc() -> gc_alloc_with_region() with the appropriate per-thread
+ * region */
- if (new_free_pointer <= boxed_region.end_addr) {
- /* Allocate from the current region. */
- void *new_obj = boxed_region.free_pointer;
- boxed_region.free_pointer = new_free_pointer;
- return((void *)new_obj);
- } else {
- /* Let full gc_alloc() handle it. */
- return gc_alloc(nbytes);
- }
+void *
+gc_general_alloc(long nbytes,int unboxed_p,int quick_p)
+{
+ struct alloc_region *my_region =
+ unboxed_p ? &unboxed_region : &boxed_region;
+ return gc_alloc_with_region(nbytes,unboxed_p, my_region,quick_p);
}
-/* Allocate space for the boxed object. If it is a large object then
- * do a large alloc else allocate from the current region. If there is
- * not enough free space then call gc_alloc() to do the job. A pointer
- * to the start of the region is returned. */
static inline void *
-gc_quick_alloc_large(int nbytes)
+gc_quick_alloc(long nbytes)
{
- void *new_free_pointer;
+ return gc_general_alloc(nbytes,ALLOC_BOXED,ALLOC_QUICK);
+}
- if (nbytes >= large_object_size)
- return gc_alloc_large(nbytes, 0, &boxed_region);
+static inline void *
+gc_quick_alloc_large(long nbytes)
+{
+ return gc_general_alloc(nbytes,ALLOC_BOXED,ALLOC_QUICK);
+}
- /* Check whether there is room in the current region. */
- new_free_pointer = boxed_region.free_pointer + nbytes;
+static inline void *
+gc_alloc_unboxed(long nbytes)
+{
+ return gc_general_alloc(nbytes,ALLOC_UNBOXED,0);
+}
- if (new_free_pointer <= boxed_region.end_addr) {
- /* If so then allocate from the current region. */
- void *new_obj = boxed_region.free_pointer;
- boxed_region.free_pointer = new_free_pointer;
- return((void *)new_obj);
- } else {
- /* Let full gc_alloc() handle it. */
- return gc_alloc(nbytes);
- }
+static inline void *
+gc_quick_alloc_unboxed(long nbytes)
+{
+ return gc_general_alloc(nbytes,ALLOC_UNBOXED,ALLOC_QUICK);
}
-static void *
-gc_alloc_unboxed(int nbytes)
+static inline void *
+gc_quick_alloc_large_unboxed(long nbytes)
{
- void *new_free_pointer;
+ return gc_general_alloc(nbytes,ALLOC_UNBOXED,ALLOC_QUICK);
+}
+\f
+/*
+ * scavenging/transporting routines derived from gc.c in CMU CL ca. 18b
+ */
- /*
- FSHOW((stderr, "/gc_alloc_unboxed() %d\n", nbytes));
- */
+extern long (*scavtab[256])(lispobj *where, lispobj object);
+extern lispobj (*transother[256])(lispobj object);
+extern long (*sizetab[256])(lispobj *where);
- /* Check whether there is room in the current region. */
- new_free_pointer = unboxed_region.free_pointer + nbytes;
+/* Copy a large boxed object. If the object is in a large object
+ * region then it is simply promoted, else it is copied. If it's large
+ * enough then it's copied to a large object region.
+ *
+ * Vectors may have shrunk. If the object is not copied the space
+ * needs to be reclaimed, and the page_tables corrected. */
+lispobj
+copy_large_object(lispobj object, long nwords)
+{
+ int tag;
+ lispobj *new;
+ long first_page;
- if (new_free_pointer <= unboxed_region.end_addr) {
- /* If so then allocate from the current region. */
- void *new_obj = unboxed_region.free_pointer;
- unboxed_region.free_pointer = new_free_pointer;
+ gc_assert(is_lisp_pointer(object));
+ gc_assert(from_space_p(object));
+ gc_assert((nwords & 0x01) == 0);
- /* Check whether the current region is almost empty. */
- if ((unboxed_region.end_addr - unboxed_region.free_pointer) <= 32) {
- /* If so finished with the current region. */
- gc_alloc_update_page_tables(1, &unboxed_region);
- /* Set up a new region. */
- gc_alloc_new_region(32, 1, &unboxed_region);
- }
-
- return((void *)new_obj);
- }
-
- /* Else not enough free space in the current region. */
-
- /* If there is a bit of room left in the current region then
- allocate a large object. */
- if ((unboxed_region.end_addr-unboxed_region.free_pointer) > 32)
- return gc_alloc_large(nbytes,1,&unboxed_region);
-
- /* Else find a new region. */
-
- /* Finished with the current region. */
- gc_alloc_update_page_tables(1, &unboxed_region);
-
- /* Set up a new region. */
- gc_alloc_new_region(nbytes, 1, &unboxed_region);
-
- /* (There should now be enough room.) */
-
- /* Check whether there is room in the current region. */
- new_free_pointer = unboxed_region.free_pointer + nbytes;
-
- if (new_free_pointer <= unboxed_region.end_addr) {
- /* If so then allocate from the current region. */
- void *new_obj = unboxed_region.free_pointer;
- unboxed_region.free_pointer = new_free_pointer;
-
- /* Check whether the current region is almost empty. */
- if ((unboxed_region.end_addr - unboxed_region.free_pointer) <= 32) {
- /* If so find, finished with the current region. */
- gc_alloc_update_page_tables(1, &unboxed_region);
-
- /* Set up a new region. */
- gc_alloc_new_region(32, 1, &unboxed_region);
- }
-
- return((void *)new_obj);
- }
-
- /* shouldn't happen? */
- gc_assert(0);
- return((void *) NIL); /* dummy value: return something ... */
-}
-
-static inline void *
-gc_quick_alloc_unboxed(int nbytes)
-{
- void *new_free_pointer;
-
- /* Check whether there is room in the current region. */
- new_free_pointer = unboxed_region.free_pointer + nbytes;
-
- if (new_free_pointer <= unboxed_region.end_addr) {
- /* If so then allocate from the current region. */
- void *new_obj = unboxed_region.free_pointer;
- unboxed_region.free_pointer = new_free_pointer;
-
- return((void *)new_obj);
- } else {
- /* Let general gc_alloc_unboxed() handle it. */
- return gc_alloc_unboxed(nbytes);
- }
-}
-
-/* Allocate space for the object. If it is a large object then do a
- * large alloc else allocate from the current region. If there is not
- * enough free space then call general gc_alloc_unboxed() to do the job.
- *
- * A pointer to the start of the region is returned. */
-static inline void *
-gc_quick_alloc_large_unboxed(int nbytes)
-{
- void *new_free_pointer;
-
- if (nbytes >= large_object_size)
- return gc_alloc_large(nbytes,1,&unboxed_region);
-
- /* Check whether there is room in the current region. */
- new_free_pointer = unboxed_region.free_pointer + nbytes;
- if (new_free_pointer <= unboxed_region.end_addr) {
- /* Allocate from the current region. */
- void *new_obj = unboxed_region.free_pointer;
- unboxed_region.free_pointer = new_free_pointer;
- return((void *)new_obj);
- } else {
- /* Let full gc_alloc() handle it. */
- return gc_alloc_unboxed(nbytes);
- }
-}
-\f
-/*
- * scavenging/transporting routines derived from gc.c in CMU CL ca. 18b
- */
-
-static int (*scavtab[256])(lispobj *where, lispobj object);
-static lispobj (*transother[256])(lispobj object);
-static int (*sizetab[256])(lispobj *where);
-
-static struct weak_pointer *weak_pointers;
-
-#define CEILING(x,y) (((x) + ((y) - 1)) & (~((y) - 1)))
-\f
-/*
- * predicates
- */
-
-static inline boolean
-from_space_p(lispobj obj)
-{
- int page_index=(void*)obj - heap_base;
- return ((page_index >= 0)
- && ((page_index = ((unsigned int)page_index)/4096) < NUM_PAGES)
- && (page_table[page_index].gen == from_space));
-}
-
-static inline boolean
-new_space_p(lispobj obj)
-{
- int page_index = (void*)obj - heap_base;
- return ((page_index >= 0)
- && ((page_index = ((unsigned int)page_index)/4096) < NUM_PAGES)
- && (page_table[page_index].gen == new_space));
-}
-\f
-/*
- * copying objects
- */
-
-/* to copy a boxed object */
-static inline lispobj
-copy_object(lispobj object, int nwords)
-{
- int tag;
- lispobj *new;
- lispobj *source, *dest;
-
- gc_assert(is_lisp_pointer(object));
- gc_assert(from_space_p(object));
- gc_assert((nwords & 0x01) == 0);
-
- /* Get tag of object. */
- tag = LowtagOf(object);
-
- /* Allocate space. */
- new = gc_quick_alloc(nwords*4);
-
- dest = new;
- source = (lispobj *) native_pointer(object);
-
- /* Copy the object. */
- while (nwords > 0) {
- dest[0] = source[0];
- dest[1] = source[1];
- dest += 2;
- source += 2;
- nwords -= 2;
- }
-
- /* Return Lisp pointer of new object. */
- return ((lispobj) new) | tag;
-}
-
-/* to copy a large boxed object. If the object is in a large object
- * region then it is simply promoted, else it is copied. If it's large
- * enough then it's copied to a large object region.
- *
- * Vectors may have shrunk. If the object is not copied the space
- * needs to be reclaimed, and the page_tables corrected. */
-static lispobj
-copy_large_object(lispobj object, int nwords)
-{
- int tag;
- lispobj *new;
- lispobj *source, *dest;
- int first_page;
-
- gc_assert(is_lisp_pointer(object));
- gc_assert(from_space_p(object));
- gc_assert((nwords & 0x01) == 0);
-
- if ((nwords > 1024*1024) && gencgc_verbose) {
- FSHOW((stderr, "/copy_large_object: %d bytes\n", nwords*4));
- }
-
- /* Check whether it's a large object. */
+ /* Check whether it's in a large object region. */
first_page = find_page_index((void *)object);
gc_assert(first_page >= 0);
/* Promote the object. */
- int remaining_bytes;
- int next_page;
- int bytes_freed;
- int old_bytes_used;
+ long remaining_bytes;
+ long next_page;
+ long bytes_freed;
+ long old_bytes_used;
/* Note: Any page write-protection must be removed, else a
* later scavenge_newspace may incorrectly not scavenge these
gc_assert(page_table[first_page].first_object_offset == 0);
next_page = first_page;
- remaining_bytes = nwords*4;
- while (remaining_bytes > 4096) {
+ remaining_bytes = nwords*N_WORD_BYTES;
+ while (remaining_bytes > PAGE_BYTES) {
gc_assert(page_table[next_page].gen == from_space);
- gc_assert(page_table[next_page].allocated == BOXED_PAGE);
+ gc_assert(page_table[next_page].allocated == BOXED_PAGE_FLAG);
gc_assert(page_table[next_page].large_object);
gc_assert(page_table[next_page].first_object_offset==
- -4096*(next_page-first_page));
- gc_assert(page_table[next_page].bytes_used == 4096);
+ -PAGE_BYTES*(next_page-first_page));
+ gc_assert(page_table[next_page].bytes_used == PAGE_BYTES);
page_table[next_page].gen = new_space;
/* Remove any write-protection. We should be able to rely
* on the write-protect flag to avoid redundant calls. */
if (page_table[next_page].write_protected) {
- os_protect(page_address(next_page), 4096, OS_VM_PROT_ALL);
+ os_protect(page_address(next_page), PAGE_BYTES, OS_VM_PROT_ALL);
page_table[next_page].write_protected = 0;
}
- remaining_bytes -= 4096;
+ remaining_bytes -= PAGE_BYTES;
next_page++;
}
gc_assert(page_table[next_page].bytes_used >= remaining_bytes);
page_table[next_page].gen = new_space;
- gc_assert(page_table[next_page].allocated = BOXED_PAGE);
+ gc_assert(page_table[next_page].allocated == BOXED_PAGE_FLAG);
/* Adjust the bytes_used. */
old_bytes_used = page_table[next_page].bytes_used;
/* Free any remaining pages; needs care. */
next_page++;
- while ((old_bytes_used == 4096) &&
+ while ((old_bytes_used == PAGE_BYTES) &&
(page_table[next_page].gen == from_space) &&
- (page_table[next_page].allocated == BOXED_PAGE) &&
+ (page_table[next_page].allocated == BOXED_PAGE_FLAG) &&
page_table[next_page].large_object &&
(page_table[next_page].first_object_offset ==
- -(next_page - first_page)*4096)) {
- /* Checks out OK, free the page. Don't need to both zeroing
+ -(next_page - first_page)*PAGE_BYTES)) {
+ /* Checks out OK, free the page. Don't need to bother zeroing
* pages as this should have been done before shrinking the
* object. These pages shouldn't be write-protected as they
* should be zero filled. */
gc_assert(page_table[next_page].write_protected == 0);
old_bytes_used = page_table[next_page].bytes_used;
- page_table[next_page].allocated = FREE_PAGE;
+ page_table[next_page].allocated = FREE_PAGE_FLAG;
page_table[next_page].bytes_used = 0;
bytes_freed += old_bytes_used;
next_page++;
}
- if ((bytes_freed > 0) && gencgc_verbose)
- FSHOW((stderr, "/copy_large_boxed bytes_freed=%d\n", bytes_freed));
-
- generations[from_space].bytes_allocated -= 4*nwords + bytes_freed;
- generations[new_space].bytes_allocated += 4*nwords;
+ generations[from_space].bytes_allocated -= N_WORD_BYTES*nwords +
+ bytes_freed;
+ generations[new_space].bytes_allocated += N_WORD_BYTES*nwords;
bytes_allocated -= bytes_freed;
/* Add the region to the new_areas if requested. */
- add_new_area(first_page,0,nwords*4);
+ add_new_area(first_page,0,nwords*N_WORD_BYTES);
return(object);
} else {
/* Get tag of object. */
- tag = LowtagOf(object);
+ tag = lowtag_of(object);
/* Allocate space. */
- new = gc_quick_alloc_large(nwords*4);
-
- dest = new;
- source = (lispobj *) native_pointer(object);
-
- /* Copy the object. */
- while (nwords > 0) {
- dest[0] = source[0];
- dest[1] = source[1];
- dest += 2;
- source += 2;
- nwords -= 2;
- }
+ new = gc_quick_alloc_large(nwords*N_WORD_BYTES);
+
+ memcpy(new,native_pointer(object),nwords*N_WORD_BYTES);
/* Return Lisp pointer of new object. */
return ((lispobj) new) | tag;
}
/* to copy unboxed objects */
-static inline lispobj
-copy_unboxed_object(lispobj object, int nwords)
+lispobj
+copy_unboxed_object(lispobj object, long nwords)
{
- int tag;
+ long tag;
lispobj *new;
- lispobj *source, *dest;
gc_assert(is_lisp_pointer(object));
gc_assert(from_space_p(object));
gc_assert((nwords & 0x01) == 0);
/* Get tag of object. */
- tag = LowtagOf(object);
+ tag = lowtag_of(object);
/* Allocate space. */
- new = gc_quick_alloc_unboxed(nwords*4);
-
- dest = new;
- source = (lispobj *) native_pointer(object);
-
- /* Copy the object. */
- while (nwords > 0) {
- dest[0] = source[0];
- dest[1] = source[1];
- dest += 2;
- source += 2;
- nwords -= 2;
- }
+ new = gc_quick_alloc_unboxed(nwords*N_WORD_BYTES);
+
+ memcpy(new,native_pointer(object),nwords*N_WORD_BYTES);
/* Return Lisp pointer of new object. */
return ((lispobj) new) | tag;
*
* KLUDGE: There's a lot of cut-and-paste duplication between this
* function and copy_large_object(..). -- WHN 20000619 */
-static lispobj
-copy_large_unboxed_object(lispobj object, int nwords)
+lispobj
+copy_large_unboxed_object(lispobj object, long nwords)
{
int tag;
lispobj *new;
- lispobj *source, *dest;
- int first_page;
+ long first_page;
gc_assert(is_lisp_pointer(object));
gc_assert(from_space_p(object));
gc_assert((nwords & 0x01) == 0);
if ((nwords > 1024*1024) && gencgc_verbose)
- FSHOW((stderr, "/copy_large_unboxed_object: %d bytes\n", nwords*4));
+ FSHOW((stderr, "/copy_large_unboxed_object: %d bytes\n", nwords*N_WORD_BYTES));
/* Check whether it's a large object. */
first_page = find_page_index((void *)object);
/* Promote the object. Note: Unboxed objects may have been
* allocated to a BOXED region so it may be necessary to
* change the region to UNBOXED. */
- int remaining_bytes;
- int next_page;
- int bytes_freed;
- int old_bytes_used;
+ long remaining_bytes;
+ long next_page;
+ long bytes_freed;
+ long old_bytes_used;
gc_assert(page_table[first_page].first_object_offset == 0);
next_page = first_page;
- remaining_bytes = nwords*4;
- while (remaining_bytes > 4096) {
+ remaining_bytes = nwords*N_WORD_BYTES;
+ while (remaining_bytes > PAGE_BYTES) {
gc_assert(page_table[next_page].gen == from_space);
- gc_assert((page_table[next_page].allocated == UNBOXED_PAGE)
- || (page_table[next_page].allocated == BOXED_PAGE));
+ gc_assert((page_table[next_page].allocated == UNBOXED_PAGE_FLAG)
+ || (page_table[next_page].allocated == BOXED_PAGE_FLAG));
gc_assert(page_table[next_page].large_object);
gc_assert(page_table[next_page].first_object_offset==
- -4096*(next_page-first_page));
- gc_assert(page_table[next_page].bytes_used == 4096);
+ -PAGE_BYTES*(next_page-first_page));
+ gc_assert(page_table[next_page].bytes_used == PAGE_BYTES);
page_table[next_page].gen = new_space;
- page_table[next_page].allocated = UNBOXED_PAGE;
- remaining_bytes -= 4096;
+ page_table[next_page].allocated = UNBOXED_PAGE_FLAG;
+ remaining_bytes -= PAGE_BYTES;
next_page++;
}
gc_assert(page_table[next_page].bytes_used >= remaining_bytes);
page_table[next_page].gen = new_space;
- page_table[next_page].allocated = UNBOXED_PAGE;
+ page_table[next_page].allocated = UNBOXED_PAGE_FLAG;
/* Adjust the bytes_used. */
old_bytes_used = page_table[next_page].bytes_used;
/* Free any remaining pages; needs care. */
next_page++;
- while ((old_bytes_used == 4096) &&
+ while ((old_bytes_used == PAGE_BYTES) &&
(page_table[next_page].gen == from_space) &&
- ((page_table[next_page].allocated == UNBOXED_PAGE)
- || (page_table[next_page].allocated == BOXED_PAGE)) &&
+ ((page_table[next_page].allocated == UNBOXED_PAGE_FLAG)
+ || (page_table[next_page].allocated == BOXED_PAGE_FLAG)) &&
page_table[next_page].large_object &&
(page_table[next_page].first_object_offset ==
- -(next_page - first_page)*4096)) {
+ -(next_page - first_page)*PAGE_BYTES)) {
/* Checks out OK, free the page. Don't need to both zeroing
* pages as this should have been done before shrinking the
* object. These pages shouldn't be write-protected, even if
gc_assert(page_table[next_page].write_protected == 0);
old_bytes_used = page_table[next_page].bytes_used;
- page_table[next_page].allocated = FREE_PAGE;
+ page_table[next_page].allocated = FREE_PAGE_FLAG;
page_table[next_page].bytes_used = 0;
bytes_freed += old_bytes_used;
next_page++;
"/copy_large_unboxed bytes_freed=%d\n",
bytes_freed));
- generations[from_space].bytes_allocated -= 4*nwords + bytes_freed;
- generations[new_space].bytes_allocated += 4*nwords;
+ generations[from_space].bytes_allocated -= nwords*N_WORD_BYTES + bytes_freed;
+ generations[new_space].bytes_allocated += nwords*N_WORD_BYTES;
bytes_allocated -= bytes_freed;
return(object);
}
else {
/* Get tag of object. */
- tag = LowtagOf(object);
+ tag = lowtag_of(object);
/* Allocate space. */
- new = gc_quick_alloc_large_unboxed(nwords*4);
-
- dest = new;
- source = (lispobj *) native_pointer(object);
-
- /* Copy the object. */
- while (nwords > 0) {
- dest[0] = source[0];
- dest[1] = source[1];
- dest += 2;
- source += 2;
- nwords -= 2;
- }
+ new = gc_quick_alloc_large_unboxed(nwords*N_WORD_BYTES);
+
+ /* Copy the object. */
+ memcpy(new,native_pointer(object),nwords*N_WORD_BYTES);
/* Return Lisp pointer of new object. */
return ((lispobj) new) | tag;
}
}
-\f
-/*
- * scavenging
- */
-/* FIXME: Most calls end up going to some trouble to compute an
- * 'n_words' value for this function. The system might be a little
- * simpler if this function used an 'end' parameter instead. */
-static void
-scavenge(lispobj *start, long n_words)
-{
- lispobj *end = start + n_words;
- lispobj *object_ptr;
- int n_words_scavenged;
-
- for (object_ptr = start;
- object_ptr < end;
- object_ptr += n_words_scavenged) {
- lispobj object = *object_ptr;
-
- gc_assert(object != 0x01); /* not a forwarding pointer */
-
- if (is_lisp_pointer(object)) {
- if (from_space_p(object)) {
- /* It currently points to old space. Check for a
- * forwarding pointer. */
- lispobj *ptr = (lispobj *)native_pointer(object);
- lispobj first_word = *ptr;
- if (first_word == 0x01) {
- /* Yes, there's a forwarding pointer. */
- *object_ptr = ptr[1];
- n_words_scavenged = 1;
- } else {
- /* Scavenge that pointer. */
- n_words_scavenged =
- (scavtab[TypeOf(object)])(object_ptr, object);
- }
- } else {
- /* It points somewhere other than oldspace. Leave it
- * alone. */
- n_words_scavenged = 1;
- }
- } else if ((object & 3) == 0) {
- /* It's a fixnum: really easy.. */
- n_words_scavenged = 1;
- } else {
- /* It's some sort of header object or another. */
- n_words_scavenged =
- (scavtab[TypeOf(object)])(object_ptr, object);
- }
- }
- gc_assert(object_ptr == end);
-}
+
\f
+
/*
* code and code-related objects
*/
-
-#define RAW_ADDR_OFFSET (6*sizeof(lispobj) - type_FunctionPointer)
-
-static lispobj trans_function_header(lispobj object);
+/*
+static lispobj trans_fun_header(lispobj object);
static lispobj trans_boxed(lispobj object);
-
-static int
-scav_function_pointer(lispobj *where, lispobj object)
-{
- lispobj *first_pointer;
- lispobj copy;
-
- gc_assert(is_lisp_pointer(object));
-
- /* Object is a pointer into from space - no a FP. */
- first_pointer = (lispobj *) native_pointer(object);
-
- /* must transport object -- object may point to either a function
- * header, a closure function header, or to a closure header. */
-
- switch (TypeOf(*first_pointer)) {
- case type_FunctionHeader:
- case type_ClosureFunctionHeader:
- copy = trans_function_header(object);
- break;
- default:
- copy = trans_boxed(object);
- break;
- }
-
- if (copy != object) {
- /* Set forwarding pointer */
- first_pointer[0] = 0x01;
- first_pointer[1] = copy;
- }
-
- gc_assert(is_lisp_pointer(copy));
- gc_assert(!from_space_p(copy));
-
- *where = copy;
-
- return 1;
-}
+*/
/* Scan a x86 compiled code object, looking for possible fixups that
* have been missed after a move.
void
sniff_code_object(struct code *code, unsigned displacement)
{
- int nheader_words, ncode_words, nwords;
+ long nheader_words, ncode_words, nwords;
void *p;
void *constants_start_addr, *constants_end_addr;
void *code_start_addr, *code_end_addr;
if (!check_code_fixups)
return;
- /* It's ok if it's byte compiled code. The trace table offset will
- * be a fixnum if it's x86 compiled code - check. */
- if (code->trace_table_offset & 0x3) {
- FSHOW((stderr, "/Sniffing byte compiled code object at %x.\n", code));
- return;
- }
-
- /* Else it's x86 machine code. */
-
ncode_words = fixnum_value(code->code_size);
nheader_words = HeaderValue(*(lispobj *)code);
nwords = ncode_words + nheader_words;
- constants_start_addr = (void *)code + 5*4;
- constants_end_addr = (void *)code + nheader_words*4;
- code_start_addr = (void *)code + nheader_words*4;
- code_end_addr = (void *)code + nwords*4;
+ constants_start_addr = (void *)code + 5*N_WORD_BYTES;
+ constants_end_addr = (void *)code + nheader_words*N_WORD_BYTES;
+ code_start_addr = (void *)code + nheader_words*N_WORD_BYTES;
+ code_end_addr = (void *)code + nwords*N_WORD_BYTES;
/* Work through the unboxed code. */
for (p = code_start_addr; p < code_end_addr; p++) {
unsigned d2 = *((unsigned char *)p - 2);
unsigned d3 = *((unsigned char *)p - 3);
unsigned d4 = *((unsigned char *)p - 4);
-#if QSHOW
+#ifdef QSHOW
unsigned d5 = *((unsigned char *)p - 5);
unsigned d6 = *((unsigned char *)p - 6);
#endif
}
}
-static void
-apply_code_fixups(struct code *old_code, struct code *new_code)
+void
+gencgc_apply_code_fixups(struct code *old_code, struct code *new_code)
{
- int nheader_words, ncode_words, nwords;
+ long nheader_words, ncode_words, nwords;
void *constants_start_addr, *constants_end_addr;
void *code_start_addr, *code_end_addr;
lispobj fixups = NIL;
unsigned displacement = (unsigned)new_code - (unsigned)old_code;
struct vector *fixups_vector;
- /* It's OK if it's byte compiled code. The trace table offset will
- * be a fixnum if it's x86 compiled code - check. */
- if (new_code->trace_table_offset & 0x3) {
-/* FSHOW((stderr, "/byte compiled code object at %x\n", new_code)); */
- return;
- }
-
- /* Else it's x86 machine code. */
ncode_words = fixnum_value(new_code->code_size);
nheader_words = HeaderValue(*(lispobj *)new_code);
nwords = ncode_words + nheader_words;
/* FSHOW((stderr,
"/compiled code object at %x: header words = %d, code words = %d\n",
new_code, nheader_words, ncode_words)); */
- constants_start_addr = (void *)new_code + 5*4;
- constants_end_addr = (void *)new_code + nheader_words*4;
- code_start_addr = (void *)new_code + nheader_words*4;
- code_end_addr = (void *)new_code + nwords*4;
+ constants_start_addr = (void *)new_code + 5*N_WORD_BYTES;
+ constants_end_addr = (void *)new_code + nheader_words*N_WORD_BYTES;
+ code_start_addr = (void *)new_code + nheader_words*N_WORD_BYTES;
+ code_end_addr = (void *)new_code + nwords*N_WORD_BYTES;
/*
FSHOW((stderr,
"/const start = %x, end = %x\n",
code objects. Check. */
fixups = new_code->constants[0];
- /* It will be 0 or the unbound-marker if there are no fixups, and
- * will be an other pointer if it is valid. */
- if ((fixups == 0) || (fixups == type_UnboundMarker) ||
+ /* It will be 0 or the unbound-marker if there are no fixups (as
+ * will be the case if the code object has been purified, for
+ * example) and will be an other pointer if it is valid. */
+ if ((fixups == 0) || (fixups == UNBOUND_MARKER_WIDETAG) ||
!is_lisp_pointer(fixups)) {
/* Check for possible errors. */
if (check_code_fixups)
sniff_code_object(new_code, displacement);
- /*fprintf(stderr,"Fixups for code object not found!?\n");
- fprintf(stderr,"*** Compiled code object at %x: header_words=%d code_words=%d .\n",
- new_code, nheader_words, ncode_words);
- fprintf(stderr,"*** Const. start = %x; end= %x; Code start = %x; end = %x\n",
- constants_start_addr,constants_end_addr,
- code_start_addr,code_end_addr);*/
return;
}
fixups_vector = (struct vector *)native_pointer(fixups);
/* Could be pointing to a forwarding pointer. */
+ /* FIXME is this always in from_space? if so, could replace this code with
+ * forwarding_pointer_p/forwarding_pointer_value */
if (is_lisp_pointer(fixups) &&
(find_page_index((void*)fixups_vector) != -1) &&
(fixups_vector->header == 0x01)) {
/*SHOW("got fixups");*/
- if (TypeOf(fixups_vector->header) == type_SimpleArrayUnsignedByte32) {
+ if (widetag_of(fixups_vector->header) == SIMPLE_ARRAY_WORD_WIDETAG) {
/* Got the fixups for the code block. Now work through the vector,
and apply a fixup at each address. */
- int length = fixnum_value(fixups_vector->length);
- int i;
+ long length = fixnum_value(fixups_vector->length);
+ long i;
for (i = 0; i < length; i++) {
unsigned offset = fixups_vector->data[i];
/* Now check the current value of offset. */
/* If it's within the old_code object then it must be an
* absolute fixup (relative ones are not saved) */
if ((old_value >= (unsigned)old_code)
- && (old_value < ((unsigned)old_code + nwords*4)))
+ && (old_value < ((unsigned)old_code + nwords*N_WORD_BYTES)))
/* So add the dispacement. */
*(unsigned *)((unsigned)code_start_addr + offset) =
old_value + displacement;
*(unsigned *)((unsigned)code_start_addr + offset) =
old_value - displacement;
}
+ } else {
+ fprintf(stderr, "widetag of fixup vector is %d\n", widetag_of(fixups_vector->header));
}
/* Check for possible errors. */
}
}
-static struct code *
-trans_code(struct code *code)
-{
- struct code *new_code;
- lispobj l_code, l_new_code;
- int nheader_words, ncode_words, nwords;
- unsigned long displacement;
- lispobj fheaderl, *prev_pointer;
-
- /* FSHOW((stderr,
- "\n/transporting code object located at 0x%08x\n",
- (unsigned long) code)); */
-
- /* If object has already been transported, just return pointer. */
- if (*((lispobj *)code) == 0x01)
- return (struct code*)(((lispobj *)code)[1]);
-
- gc_assert(TypeOf(code->header) == type_CodeHeader);
-
- /* Prepare to transport the code vector. */
- l_code = (lispobj) code | type_OtherPointer;
-
- ncode_words = fixnum_value(code->code_size);
- nheader_words = HeaderValue(code->header);
- nwords = ncode_words + nheader_words;
- nwords = CEILING(nwords, 2);
-
- l_new_code = copy_large_object(l_code, nwords);
- new_code = (struct code *) native_pointer(l_new_code);
-
- /* may not have been moved.. */
- if (new_code == code)
- return new_code;
-
- displacement = l_new_code - l_code;
-
- /*
- FSHOW((stderr,
- "/old code object at 0x%08x, new code object at 0x%08x\n",
- (unsigned long) code,
- (unsigned long) new_code));
- FSHOW((stderr, "/Code object is %d words long.\n", nwords));
- */
-
- /* Set forwarding pointer. */
- ((lispobj *)code)[0] = 0x01;
- ((lispobj *)code)[1] = l_new_code;
-
- /* Set forwarding pointers for all the function headers in the
- * code object. Also fix all self pointers. */
-
- fheaderl = code->entry_points;
- prev_pointer = &new_code->entry_points;
-
- while (fheaderl != NIL) {
- struct function *fheaderp, *nfheaderp;
- lispobj nfheaderl;
-
- fheaderp = (struct function *) native_pointer(fheaderl);
- gc_assert(TypeOf(fheaderp->header) == type_FunctionHeader);
-
- /* Calculate the new function pointer and the new */
- /* function header. */
- nfheaderl = fheaderl + displacement;
- nfheaderp = (struct function *) native_pointer(nfheaderl);
-
- /* Set forwarding pointer. */
- ((lispobj *)fheaderp)[0] = 0x01;
- ((lispobj *)fheaderp)[1] = nfheaderl;
-
- /* Fix self pointer. */
- nfheaderp->self = nfheaderl + RAW_ADDR_OFFSET;
-
- *prev_pointer = nfheaderl;
-
- fheaderl = fheaderp->next;
- prev_pointer = &nfheaderp->next;
- }
-
- /* sniff_code_object(new_code,displacement);*/
- apply_code_fixups(code,new_code);
-
- return new_code;
-}
-
-static int
-scav_code_header(lispobj *where, lispobj object)
-{
- struct code *code;
- int n_header_words, n_code_words, n_words;
- lispobj entry_point; /* tagged pointer to entry point */
- struct function *function_ptr; /* untagged pointer to entry point */
-
- code = (struct code *) where;
- n_code_words = fixnum_value(code->code_size);
- n_header_words = HeaderValue(object);
- n_words = n_code_words + n_header_words;
- n_words = CEILING(n_words, 2);
-
- /* Scavenge the boxed section of the code data block. */
- scavenge(where + 1, n_header_words - 1);
-
- /* Scavenge the boxed section of each function object in the */
- /* code data block. */
- for (entry_point = code->entry_points;
- entry_point != NIL;
- entry_point = function_ptr->next) {
-
- gc_assert(is_lisp_pointer(entry_point));
-
- function_ptr = (struct function *) native_pointer(entry_point);
- gc_assert(TypeOf(function_ptr->header) == type_FunctionHeader);
-
- scavenge(&function_ptr->name, 1);
- scavenge(&function_ptr->arglist, 1);
- scavenge(&function_ptr->type, 1);
- }
-
- return n_words;
-}
static lispobj
-trans_code_header(lispobj object)
+trans_boxed_large(lispobj object)
{
- struct code *ncode;
-
- ncode = trans_code((struct code *) native_pointer(object));
- return (lispobj) ncode | type_OtherPointer;
-}
+ lispobj header;
+ unsigned long length;
-static int
-size_code_header(lispobj *where)
-{
- struct code *code;
- int nheader_words, ncode_words, nwords;
+ gc_assert(is_lisp_pointer(object));
- code = (struct code *) where;
-
- ncode_words = fixnum_value(code->code_size);
- nheader_words = HeaderValue(code->header);
- nwords = ncode_words + nheader_words;
- nwords = CEILING(nwords, 2);
+ header = *((lispobj *) native_pointer(object));
+ length = HeaderValue(header) + 1;
+ length = CEILING(length, 2);
- return nwords;
+ return copy_large_object(object, length);
}
-static int
-scav_return_pc_header(lispobj *where, lispobj object)
-{
- lose("attempted to scavenge a return PC header where=0x%08x object=0x%08x",
- (unsigned long) where,
- (unsigned long) object);
- return 0; /* bogus return value to satisfy static type checking */
-}
static lispobj
-trans_return_pc_header(lispobj object)
+trans_unboxed_large(lispobj object)
{
- struct function *return_pc;
- unsigned long offset;
- struct code *code, *ncode;
-
- SHOW("/trans_return_pc_header: Will this work?");
-
- return_pc = (struct function *) native_pointer(object);
- offset = HeaderValue(return_pc->header) * 4;
+ lispobj header;
+ unsigned long length;
- /* Transport the whole code object. */
- code = (struct code *) ((unsigned long) return_pc - offset);
- ncode = trans_code(code);
- return ((lispobj) ncode + offset) | type_OtherPointer;
-}
+ gc_assert(is_lisp_pointer(object));
-/* On the 386, closures hold a pointer to the raw address instead of the
- * function object. */
-#ifdef __i386__
-static int
-scav_closure_header(lispobj *where, lispobj object)
-{
- struct closure *closure;
- lispobj fun;
-
- closure = (struct closure *)where;
- fun = closure->function - RAW_ADDR_OFFSET;
- scavenge(&fun, 1);
- /* The function may have moved so update the raw address. But
- * don't write unnecessarily. */
- if (closure->function != fun + RAW_ADDR_OFFSET)
- closure->function = fun + RAW_ADDR_OFFSET;
-
- return 2;
-}
-#endif
+ header = *((lispobj *) native_pointer(object));
+ length = HeaderValue(header) + 1;
+ length = CEILING(length, 2);
-static int
-scav_function_header(lispobj *where, lispobj object)
-{
- lose("attempted to scavenge a function header where=0x%08x object=0x%08x",
- (unsigned long) where,
- (unsigned long) object);
- return 0; /* bogus return value to satisfy static type checking */
+ return copy_large_unboxed_object(object, length);
}
-static lispobj
-trans_function_header(lispobj object)
-{
- struct function *fheader;
- unsigned long offset;
- struct code *code, *ncode;
-
- fheader = (struct function *) native_pointer(object);
- offset = HeaderValue(fheader->header) * 4;
-
- /* Transport the whole code object. */
- code = (struct code *) ((unsigned long) fheader - offset);
- ncode = trans_code(code);
-
- return ((lispobj) ncode + offset) | type_FunctionPointer;
-}
\f
/*
- * instances
+ * vector-like objects
*/
+
+/* FIXME: What does this mean? */
+int gencgc_hash = 1;
+
static int
-scav_instance_pointer(lispobj *where, lispobj object)
+scav_vector(lispobj *where, lispobj object)
{
- lispobj copy, *first_pointer;
+ unsigned long kv_length;
+ lispobj *kv_vector;
+ unsigned long length = 0; /* (0 = dummy to stop GCC warning) */
+ struct hash_table *hash_table;
+ lispobj empty_symbol;
+ unsigned long *index_vector = NULL; /* (NULL = dummy to stop GCC warning) */
+ unsigned long *next_vector = NULL; /* (NULL = dummy to stop GCC warning) */
+ unsigned long *hash_vector = NULL; /* (NULL = dummy to stop GCC warning) */
+ lispobj weak_p_obj;
+ unsigned next_vector_length = 0;
- /* Object is a pointer into from space - not a FP. */
- copy = trans_boxed(object);
+ /* FIXME: A comment explaining this would be nice. It looks as
+ * though SB-VM:VECTOR-VALID-HASHING-SUBTYPE is set for EQ-based
+ * hash tables in the Lisp HASH-TABLE code, and nowhere else. */
+ if (HeaderValue(object) != subtype_VectorValidHashing)
+ return 1;
- gc_assert(copy != object);
+ if (!gencgc_hash) {
+ /* This is set for backward compatibility. FIXME: Do we need
+ * this any more? */
+ *where =
+ (subtype_VectorMustRehash<<N_WIDETAG_BITS) | SIMPLE_VECTOR_WIDETAG;
+ return 1;
+ }
- first_pointer = (lispobj *) native_pointer(object);
-
- /* Set forwarding pointer. */
- first_pointer[0] = 0x01;
- first_pointer[1] = copy;
- *where = copy;
-
- return 1;
-}
-\f
-/*
- * lists and conses
- */
-
-static lispobj trans_list(lispobj object);
-
-static int
-scav_list_pointer(lispobj *where, lispobj object)
-{
- lispobj first, *first_pointer;
-
- gc_assert(is_lisp_pointer(object));
-
- /* Object is a pointer into from space - not FP. */
-
- first = trans_list(object);
- gc_assert(first != object);
-
- first_pointer = (lispobj *) native_pointer(object);
-
- /* Set forwarding pointer */
- first_pointer[0] = 0x01;
- first_pointer[1] = first;
-
- gc_assert(is_lisp_pointer(first));
- gc_assert(!from_space_p(first));
- *where = first;
- return 1;
-}
-
-static lispobj
-trans_list(lispobj object)
-{
- lispobj new_list_pointer;
- struct cons *cons, *new_cons;
- lispobj cdr;
-
- gc_assert(from_space_p(object));
-
- cons = (struct cons *) native_pointer(object);
-
- /* Copy 'object'. */
- new_cons = (struct cons *) gc_quick_alloc(sizeof(struct cons));
- new_cons->car = cons->car;
- new_cons->cdr = cons->cdr; /* updated later */
- new_list_pointer = (lispobj)new_cons | LowtagOf(object);
-
- /* Grab the cdr before it is clobbered. */
- cdr = cons->cdr;
-
- /* Set forwarding pointer (clobbers start of list). */
- cons->car = 0x01;
- cons->cdr = new_list_pointer;
-
- /* Try to linearize the list in the cdr direction to help reduce
- * paging. */
- while (1) {
- lispobj new_cdr;
- struct cons *cdr_cons, *new_cdr_cons;
-
- if (LowtagOf(cdr) != type_ListPointer || !from_space_p(cdr)
- || (*((lispobj *)native_pointer(cdr)) == 0x01))
- break;
-
- cdr_cons = (struct cons *) native_pointer(cdr);
-
- /* Copy 'cdr'. */
- new_cdr_cons = (struct cons*) gc_quick_alloc(sizeof(struct cons));
- new_cdr_cons->car = cdr_cons->car;
- new_cdr_cons->cdr = cdr_cons->cdr;
- new_cdr = (lispobj)new_cdr_cons | LowtagOf(cdr);
-
- /* Grab the cdr before it is clobbered. */
- cdr = cdr_cons->cdr;
-
- /* Set forwarding pointer. */
- cdr_cons->car = 0x01;
- cdr_cons->cdr = new_cdr;
-
- /* Update the cdr of the last cons copied into new space to
- * keep the newspace scavenge from having to do it. */
- new_cons->cdr = new_cdr;
-
- new_cons = new_cdr_cons;
- }
-
- return new_list_pointer;
-}
-
-\f
-/*
- * scavenging and transporting other pointers
- */
-
-static int
-scav_other_pointer(lispobj *where, lispobj object)
-{
- lispobj first, *first_pointer;
-
- gc_assert(is_lisp_pointer(object));
-
- /* Object is a pointer into from space - not FP. */
- first_pointer = (lispobj *) native_pointer(object);
-
- first = (transother[TypeOf(*first_pointer)])(object);
-
- if (first != object) {
- /* Set forwarding pointer. */
- first_pointer[0] = 0x01;
- first_pointer[1] = first;
- *where = first;
- }
-
- gc_assert(is_lisp_pointer(first));
- gc_assert(!from_space_p(first));
-
- return 1;
-}
-\f
-/*
- * immediate, boxed, and unboxed objects
- */
-
-static int
-size_pointer(lispobj *where)
-{
- return 1;
-}
-
-static int
-scav_immediate(lispobj *where, lispobj object)
-{
- return 1;
-}
-
-static lispobj
-trans_immediate(lispobj object)
-{
- lose("trying to transport an immediate");
- return NIL; /* bogus return value to satisfy static type checking */
-}
-
-static int
-size_immediate(lispobj *where)
-{
- return 1;
-}
-
-
-static int
-scav_boxed(lispobj *where, lispobj object)
-{
- return 1;
-}
-
-static lispobj
-trans_boxed(lispobj object)
-{
- lispobj header;
- unsigned long length;
-
- gc_assert(is_lisp_pointer(object));
-
- header = *((lispobj *) native_pointer(object));
- length = HeaderValue(header) + 1;
- length = CEILING(length, 2);
-
- return copy_object(object, length);
-}
-
-static lispobj
-trans_boxed_large(lispobj object)
-{
- lispobj header;
- unsigned long length;
-
- gc_assert(is_lisp_pointer(object));
-
- header = *((lispobj *) native_pointer(object));
- length = HeaderValue(header) + 1;
- length = CEILING(length, 2);
-
- return copy_large_object(object, length);
-}
-
-static int
-size_boxed(lispobj *where)
-{
- lispobj header;
- unsigned long length;
-
- header = *where;
- length = HeaderValue(header) + 1;
- length = CEILING(length, 2);
-
- return length;
-}
-
-static int
-scav_fdefn(lispobj *where, lispobj object)
-{
- struct fdefn *fdefn;
-
- fdefn = (struct fdefn *)where;
-
- /* FSHOW((stderr, "scav_fdefn, function = %p, raw_addr = %p\n",
- fdefn->function, fdefn->raw_addr)); */
-
- if ((char *)(fdefn->function + RAW_ADDR_OFFSET) == fdefn->raw_addr) {
- scavenge(where + 1, sizeof(struct fdefn)/sizeof(lispobj) - 1);
-
- /* Don't write unnecessarily. */
- if (fdefn->raw_addr != (char *)(fdefn->function + RAW_ADDR_OFFSET))
- fdefn->raw_addr = (char *)(fdefn->function + RAW_ADDR_OFFSET);
-
- return sizeof(struct fdefn) / sizeof(lispobj);
- } else {
- return 1;
- }
-}
-
-static int
-scav_unboxed(lispobj *where, lispobj object)
-{
- unsigned long length;
-
- length = HeaderValue(object) + 1;
- length = CEILING(length, 2);
-
- return length;
-}
-
-static lispobj
-trans_unboxed(lispobj object)
-{
- lispobj header;
- unsigned long length;
-
-
- gc_assert(is_lisp_pointer(object));
-
- header = *((lispobj *) native_pointer(object));
- length = HeaderValue(header) + 1;
- length = CEILING(length, 2);
-
- return copy_unboxed_object(object, length);
-}
-
-static lispobj
-trans_unboxed_large(lispobj object)
-{
- lispobj header;
- unsigned long length;
-
-
- gc_assert(is_lisp_pointer(object));
-
- header = *((lispobj *) native_pointer(object));
- length = HeaderValue(header) + 1;
- length = CEILING(length, 2);
-
- return copy_large_unboxed_object(object, length);
-}
-
-static int
-size_unboxed(lispobj *where)
-{
- lispobj header;
- unsigned long length;
-
- header = *where;
- length = HeaderValue(header) + 1;
- length = CEILING(length, 2);
-
- return length;
-}
-\f
-/*
- * vector-like objects
- */
-
-#define NWORDS(x,y) (CEILING((x),(y)) / (y))
-
-static int
-scav_string(lispobj *where, lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- /* NOTE: Strings contain one more byte of data than the length */
- /* slot indicates. */
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length) + 1;
- nwords = CEILING(NWORDS(length, 4) + 2, 2);
-
- return nwords;
-}
-
-static lispobj
-trans_string(lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- gc_assert(is_lisp_pointer(object));
-
- /* NOTE: A string contains one more byte of data (a terminating
- * '\0' to help when interfacing with C functions) than indicated
- * by the length slot. */
-
- vector = (struct vector *) native_pointer(object);
- length = fixnum_value(vector->length) + 1;
- nwords = CEILING(NWORDS(length, 4) + 2, 2);
-
- return copy_large_unboxed_object(object, nwords);
-}
-
-static int
-size_string(lispobj *where)
-{
- struct vector *vector;
- int length, nwords;
-
- /* NOTE: A string contains one more byte of data (a terminating
- * '\0' to help when interfacing with C functions) than indicated
- * by the length slot. */
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length) + 1;
- nwords = CEILING(NWORDS(length, 4) + 2, 2);
-
- return nwords;
-}
-
-/* FIXME: What does this mean? */
-int gencgc_hash = 1;
-
-static int
-scav_vector(lispobj *where, lispobj object)
-{
- unsigned int kv_length;
- lispobj *kv_vector;
- unsigned int length = 0; /* (0 = dummy to stop GCC warning) */
- lispobj *hash_table;
- lispobj empty_symbol;
- unsigned int *index_vector = NULL; /* (NULL = dummy to stop GCC warning) */
- unsigned int *next_vector = NULL; /* (NULL = dummy to stop GCC warning) */
- unsigned int *hash_vector = NULL; /* (NULL = dummy to stop GCC warning) */
- lispobj weak_p_obj;
- unsigned next_vector_length = 0;
-
- /* FIXME: A comment explaining this would be nice. It looks as
- * though SB-VM:VECTOR-VALID-HASHING-SUBTYPE is set for EQ-based
- * hash tables in the Lisp HASH-TABLE code, and nowhere else. */
- if (HeaderValue(object) != subtype_VectorValidHashing)
- return 1;
-
- if (!gencgc_hash) {
- /* This is set for backward compatibility. FIXME: Do we need
- * this any more? */
- *where = (subtype_VectorMustRehash << type_Bits) | type_SimpleVector;
- return 1;
- }
-
- kv_length = fixnum_value(where[1]);
- kv_vector = where + 2; /* Skip the header and length. */
- /*FSHOW((stderr,"/kv_length = %d\n", kv_length));*/
+ kv_length = fixnum_value(where[1]);
+ kv_vector = where + 2; /* Skip the header and length. */
+ /*FSHOW((stderr,"/kv_length = %d\n", kv_length));*/
/* Scavenge element 0, which may be a hash-table structure. */
scavenge(where+2, 1);
}
hash_table = (lispobj *)native_pointer(where[2]);
/*FSHOW((stderr,"/hash_table = %x\n", hash_table));*/
- if (TypeOf(hash_table[0]) != type_InstanceHeader) {
- lose("hash table not instance (%x at %x)", hash_table[0], hash_table);
+ if (widetag_of(hash_table->header) != INSTANCE_HEADER_WIDETAG) {
+ lose("hash table not instance (%x at %x)",
+ hash_table->header,
+ hash_table);
}
/* Scavenge element 1, which should be some internal symbol that
}
empty_symbol = where[3];
/* fprintf(stderr,"* empty_symbol = %x\n", empty_symbol);*/
- if (TypeOf(*(lispobj *)native_pointer(empty_symbol)) != type_SymbolHeader) {
+ if (widetag_of(*(lispobj *)native_pointer(empty_symbol)) !=
+ SYMBOL_HEADER_WIDETAG) {
lose("not a symbol where empty-hash-table-slot symbol expected: %x",
*(lispobj *)native_pointer(empty_symbol));
}
/* Scavenge hash table, which will fix the positions of the other
* needed objects. */
- scavenge(hash_table, 16);
+ scavenge(hash_table, sizeof(struct hash_table) / sizeof(lispobj));
/* Cross-check the kv_vector. */
- if (where != (lispobj *)native_pointer(hash_table[9])) {
- lose("hash_table table!=this table %x", hash_table[9]);
+ if (where != (lispobj *)native_pointer(hash_table->table)) {
+ lose("hash_table table!=this table %x", hash_table->table);
}
/* WEAK-P */
- weak_p_obj = hash_table[10];
+ weak_p_obj = hash_table->weak_p;
/* index vector */
{
- lispobj index_vector_obj = hash_table[13];
+ lispobj index_vector_obj = hash_table->index_vector;
if (is_lisp_pointer(index_vector_obj) &&
- (TypeOf(*(lispobj *)native_pointer(index_vector_obj)) == type_SimpleArrayUnsignedByte32)) {
- index_vector = ((unsigned int *)native_pointer(index_vector_obj)) + 2;
+ (widetag_of(*(lispobj *)native_pointer(index_vector_obj)) ==
+ SIMPLE_ARRAY_WORD_WIDETAG)) {
+ index_vector = ((lispobj *)native_pointer(index_vector_obj)) + 2;
/*FSHOW((stderr, "/index_vector = %x\n",index_vector));*/
- length = fixnum_value(((unsigned int *)native_pointer(index_vector_obj))[1]);
+ length = fixnum_value(((lispobj *)native_pointer(index_vector_obj))[1]);
/*FSHOW((stderr, "/length = %d\n", length));*/
} else {
lose("invalid index_vector %x", index_vector_obj);
/* next vector */
{
- lispobj next_vector_obj = hash_table[14];
+ lispobj next_vector_obj = hash_table->next_vector;
if (is_lisp_pointer(next_vector_obj) &&
- (TypeOf(*(lispobj *)native_pointer(next_vector_obj)) == type_SimpleArrayUnsignedByte32)) {
- next_vector = ((unsigned int *)native_pointer(next_vector_obj)) + 2;
+ (widetag_of(*(lispobj *)native_pointer(next_vector_obj)) ==
+ SIMPLE_ARRAY_WORD_WIDETAG)) {
+ next_vector = ((lispobj *)native_pointer(next_vector_obj)) + 2;
/*FSHOW((stderr, "/next_vector = %x\n", next_vector));*/
- next_vector_length = fixnum_value(((unsigned int *)native_pointer(next_vector_obj))[1]);
+ next_vector_length = fixnum_value(((lispobj *)native_pointer(next_vector_obj))[1]);
/*FSHOW((stderr, "/next_vector_length = %d\n", next_vector_length));*/
} else {
lose("invalid next_vector %x", next_vector_obj);
/* maybe hash vector */
{
- /* FIXME: This bare "15" offset should become a symbolic
- * expression of some sort. And all the other bare offsets
- * too. And the bare "16" in scavenge(hash_table, 16). And
- * probably other stuff too. Ugh.. */
- lispobj hash_vector_obj = hash_table[15];
+ lispobj hash_vector_obj = hash_table->hash_vector;
if (is_lisp_pointer(hash_vector_obj) &&
- (TypeOf(*(lispobj *)native_pointer(hash_vector_obj))
- == type_SimpleArrayUnsignedByte32)) {
- hash_vector = ((unsigned int *)native_pointer(hash_vector_obj)) + 2;
+ (widetag_of(*(lispobj *)native_pointer(hash_vector_obj)) ==
+ SIMPLE_ARRAY_WORD_WIDETAG)){
+ hash_vector = ((lispobj *)native_pointer(hash_vector_obj)) + 2;
/*FSHOW((stderr, "/hash_vector = %x\n", hash_vector));*/
- gc_assert(fixnum_value(((unsigned int *)native_pointer(hash_vector_obj))[1])
+ gc_assert(fixnum_value(((lispobj *)native_pointer(hash_vector_obj))[1])
== next_vector_length);
} else {
hash_vector = NULL;
/* Work through the KV vector. */
{
- int i;
+ long i;
for (i = 1; i < next_vector_length; i++) {
lispobj old_key = kv_vector[2*i];
- unsigned int old_index = (old_key & 0x1fffffff)%length;
+
+#if N_WORD_BITS == 32
+ unsigned long old_index = (old_key & 0x1fffffff)%length;
+#elif N_WORD_BITS == 64
+ unsigned long old_index = (old_key & 0x1fffffffffffffff)%length;
+#endif
/* Scavenge the key and value. */
scavenge(&kv_vector[2*i],2);
/* Check whether the key has moved and is EQ based. */
{
lispobj new_key = kv_vector[2*i];
- unsigned int new_index = (new_key & 0x1fffffff)%length;
+#if N_WORD_BITS == 32
+ unsigned long new_index = (new_key & 0x1fffffff)%length;
+#elif N_WORD_BITS == 64
+ unsigned long new_index = (new_key & 0x1fffffffffffffff)%length;
+#endif
if ((old_index != new_index) &&
((!hash_vector) || (hash_vector[i] == 0x80000000)) &&
((new_key != empty_symbol) ||
(kv_vector[2*i] != empty_symbol))) {
- /*FSHOW((stderr,
- "* EQ key %d moved from %x to %x; index %d to %d\n",
- i, old_key, new_key, old_index, new_index));*/
+ /*FSHOW((stderr,
+ "* EQ key %d moved from %x to %x; index %d to %d\n",
+ i, old_key, new_key, old_index, new_index));*/
if (index_vector[old_index] != 0) {
- /*FSHOW((stderr, "/P1 %d\n", index_vector[old_index]));*/
+ /*FSHOW((stderr, "/P1 %d\n", index_vector[old_index]));*/
/* Unlink the key from the old_index chain. */
if (index_vector[old_index] == i) {
/*FSHOW((stderr, "/P2a %d\n", next_vector[i]));*/
index_vector[old_index] = next_vector[i];
/* Link it into the needing rehash chain. */
- next_vector[i] = fixnum_value(hash_table[11]);
- hash_table[11] = make_fixnum(i);
+ next_vector[i] = fixnum_value(hash_table->needing_rehash);
+ hash_table->needing_rehash = make_fixnum(i);
/*SHOW("P2");*/
} else {
unsigned prior = index_vector[old_index];
/*FSHOW((stderr, "/P3a %d %d\n", prior, next));*/
while (next != 0) {
- /*FSHOW((stderr, "/P3b %d %d\n", prior, next));*/
+ /*FSHOW((stderr, "/P3b %d %d\n", prior, next));*/
if (next == i) {
/* Unlink it. */
next_vector[prior] = next_vector[next];
/* Link it into the needing rehash
* chain. */
next_vector[next] =
- fixnum_value(hash_table[11]);
- hash_table[11] = make_fixnum(next);
+ fixnum_value(hash_table->needing_rehash);
+ hash_table->needing_rehash = make_fixnum(next);
/*SHOW("/P3");*/
break;
}
prior = next;
next = next_vector[next];
}
- }
- }
- }
- }
- }
- }
- return (CEILING(kv_length + 2, 2));
-}
-
-static lispobj
-trans_vector(lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- gc_assert(is_lisp_pointer(object));
-
- vector = (struct vector *) native_pointer(object);
-
- length = fixnum_value(vector->length);
- nwords = CEILING(length + 2, 2);
-
- return copy_large_object(object, nwords);
-}
-
-static int
-size_vector(lispobj *where)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(length + 2, 2);
-
- return nwords;
-}
-
-
-static int
-scav_vector_bit(lispobj *where, lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(NWORDS(length, 32) + 2, 2);
-
- return nwords;
-}
-
-static lispobj
-trans_vector_bit(lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- gc_assert(is_lisp_pointer(object));
-
- vector = (struct vector *) native_pointer(object);
- length = fixnum_value(vector->length);
- nwords = CEILING(NWORDS(length, 32) + 2, 2);
-
- return copy_large_unboxed_object(object, nwords);
-}
-
-static int
-size_vector_bit(lispobj *where)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(NWORDS(length, 32) + 2, 2);
-
- return nwords;
-}
-
-
-static int
-scav_vector_unsigned_byte_2(lispobj *where, lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(NWORDS(length, 16) + 2, 2);
-
- return nwords;
-}
-
-static lispobj
-trans_vector_unsigned_byte_2(lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- gc_assert(is_lisp_pointer(object));
-
- vector = (struct vector *) native_pointer(object);
- length = fixnum_value(vector->length);
- nwords = CEILING(NWORDS(length, 16) + 2, 2);
-
- return copy_large_unboxed_object(object, nwords);
-}
-
-static int
-size_vector_unsigned_byte_2(lispobj *where)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(NWORDS(length, 16) + 2, 2);
-
- return nwords;
-}
-
-
-static int
-scav_vector_unsigned_byte_4(lispobj *where, lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(NWORDS(length, 8) + 2, 2);
-
- return nwords;
-}
-
-static lispobj
-trans_vector_unsigned_byte_4(lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- gc_assert(is_lisp_pointer(object));
-
- vector = (struct vector *) native_pointer(object);
- length = fixnum_value(vector->length);
- nwords = CEILING(NWORDS(length, 8) + 2, 2);
-
- return copy_large_unboxed_object(object, nwords);
-}
-
-static int
-size_vector_unsigned_byte_4(lispobj *where)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(NWORDS(length, 8) + 2, 2);
-
- return nwords;
-}
-
-static int
-scav_vector_unsigned_byte_8(lispobj *where, lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(NWORDS(length, 4) + 2, 2);
-
- return nwords;
-}
-
-static lispobj
-trans_vector_unsigned_byte_8(lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- gc_assert(is_lisp_pointer(object));
-
- vector = (struct vector *) native_pointer(object);
- length = fixnum_value(vector->length);
- nwords = CEILING(NWORDS(length, 4) + 2, 2);
-
- return copy_large_unboxed_object(object, nwords);
-}
-
-static int
-size_vector_unsigned_byte_8(lispobj *where)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(NWORDS(length, 4) + 2, 2);
-
- return nwords;
-}
-
-
-static int
-scav_vector_unsigned_byte_16(lispobj *where, lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(NWORDS(length, 2) + 2, 2);
-
- return nwords;
-}
-
-static lispobj
-trans_vector_unsigned_byte_16(lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- gc_assert(is_lisp_pointer(object));
-
- vector = (struct vector *) native_pointer(object);
- length = fixnum_value(vector->length);
- nwords = CEILING(NWORDS(length, 2) + 2, 2);
-
- return copy_large_unboxed_object(object, nwords);
-}
-
-static int
-size_vector_unsigned_byte_16(lispobj *where)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(NWORDS(length, 2) + 2, 2);
-
- return nwords;
-}
-
-static int
-scav_vector_unsigned_byte_32(lispobj *where, lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(length + 2, 2);
-
- return nwords;
-}
-
-static lispobj
-trans_vector_unsigned_byte_32(lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- gc_assert(is_lisp_pointer(object));
-
- vector = (struct vector *) native_pointer(object);
- length = fixnum_value(vector->length);
- nwords = CEILING(length + 2, 2);
-
- return copy_large_unboxed_object(object, nwords);
-}
-
-static int
-size_vector_unsigned_byte_32(lispobj *where)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(length + 2, 2);
-
- return nwords;
-}
-
-static int
-scav_vector_single_float(lispobj *where, lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(length + 2, 2);
-
- return nwords;
-}
-
-static lispobj
-trans_vector_single_float(lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- gc_assert(is_lisp_pointer(object));
-
- vector = (struct vector *) native_pointer(object);
- length = fixnum_value(vector->length);
- nwords = CEILING(length + 2, 2);
-
- return copy_large_unboxed_object(object, nwords);
-}
-
-static int
-size_vector_single_float(lispobj *where)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(length + 2, 2);
-
- return nwords;
-}
-
-static int
-scav_vector_double_float(lispobj *where, lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(length * 2 + 2, 2);
-
- return nwords;
-}
-
-static lispobj
-trans_vector_double_float(lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- gc_assert(is_lisp_pointer(object));
-
- vector = (struct vector *) native_pointer(object);
- length = fixnum_value(vector->length);
- nwords = CEILING(length * 2 + 2, 2);
-
- return copy_large_unboxed_object(object, nwords);
-}
-
-static int
-size_vector_double_float(lispobj *where)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(length * 2 + 2, 2);
-
- return nwords;
-}
-
-#ifdef type_SimpleArrayLongFloat
-static int
-scav_vector_long_float(lispobj *where, lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(length * 3 + 2, 2);
-
- return nwords;
-}
-
-static lispobj
-trans_vector_long_float(lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- gc_assert(is_lisp_pointer(object));
-
- vector = (struct vector *) native_pointer(object);
- length = fixnum_value(vector->length);
- nwords = CEILING(length * 3 + 2, 2);
-
- return copy_large_unboxed_object(object, nwords);
-}
-
-static int
-size_vector_long_float(lispobj *where)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(length * 3 + 2, 2);
-
- return nwords;
-}
-#endif
-
-
-#ifdef type_SimpleArrayComplexSingleFloat
-static int
-scav_vector_complex_single_float(lispobj *where, lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(length * 2 + 2, 2);
-
- return nwords;
-}
-
-static lispobj
-trans_vector_complex_single_float(lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- gc_assert(is_lisp_pointer(object));
-
- vector = (struct vector *) native_pointer(object);
- length = fixnum_value(vector->length);
- nwords = CEILING(length * 2 + 2, 2);
-
- return copy_large_unboxed_object(object, nwords);
-}
-
-static int
-size_vector_complex_single_float(lispobj *where)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(length * 2 + 2, 2);
-
- return nwords;
-}
-#endif
-
-#ifdef type_SimpleArrayComplexDoubleFloat
-static int
-scav_vector_complex_double_float(lispobj *where, lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(length * 4 + 2, 2);
-
- return nwords;
-}
-
-static lispobj
-trans_vector_complex_double_float(lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- gc_assert(is_lisp_pointer(object));
-
- vector = (struct vector *) native_pointer(object);
- length = fixnum_value(vector->length);
- nwords = CEILING(length * 4 + 2, 2);
-
- return copy_large_unboxed_object(object, nwords);
-}
-
-static int
-size_vector_complex_double_float(lispobj *where)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(length * 4 + 2, 2);
-
- return nwords;
-}
-#endif
-
-
-#ifdef type_SimpleArrayComplexLongFloat
-static int
-scav_vector_complex_long_float(lispobj *where, lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(length * 6 + 2, 2);
-
- return nwords;
-}
-
-static lispobj
-trans_vector_complex_long_float(lispobj object)
-{
- struct vector *vector;
- int length, nwords;
-
- gc_assert(is_lisp_pointer(object));
-
- vector = (struct vector *) native_pointer(object);
- length = fixnum_value(vector->length);
- nwords = CEILING(length * 6 + 2, 2);
-
- return copy_large_unboxed_object(object, nwords);
-}
-
-static int
-size_vector_complex_long_float(lispobj *where)
-{
- struct vector *vector;
- int length, nwords;
-
- vector = (struct vector *) where;
- length = fixnum_value(vector->length);
- nwords = CEILING(length * 6 + 2, 2);
-
- return nwords;
-}
-#endif
-
-\f
-/*
- * weak pointers
- */
-
-/* XX This is a hack adapted from cgc.c. These don't work too well with the
- * gencgc as a list of the weak pointers is maintained within the
- * objects which causes writes to the pages. A limited attempt is made
- * to avoid unnecessary writes, but this needs a re-think. */
-
-#define WEAK_POINTER_NWORDS \
- CEILING((sizeof(struct weak_pointer) / sizeof(lispobj)), 2)
-
-static int
-scav_weak_pointer(lispobj *where, lispobj object)
-{
- struct weak_pointer *wp = weak_pointers;
- /* Push the weak pointer onto the list of weak pointers.
- * Do I have to watch for duplicates? Originally this was
- * part of trans_weak_pointer but that didn't work in the
- * case where the WP was in a promoted region.
- */
-
- /* Check whether it's already in the list. */
- while (wp != NULL) {
- if (wp == (struct weak_pointer*)where) {
- break;
- }
- wp = wp->next;
- }
- if (wp == NULL) {
- /* Add it to the start of the list. */
- wp = (struct weak_pointer*)where;
- if (wp->next != weak_pointers) {
- wp->next = weak_pointers;
- } else {
- /*SHOW("avoided write to weak pointer");*/
- }
- weak_pointers = wp;
- }
-
- /* Do not let GC scavenge the value slot of the weak pointer.
- * (That is why it is a weak pointer.) */
-
- return WEAK_POINTER_NWORDS;
-}
-
-static lispobj
-trans_weak_pointer(lispobj object)
-{
- lispobj copy;
- /* struct weak_pointer *wp; */
-
- gc_assert(is_lisp_pointer(object));
-
-#if defined(DEBUG_WEAK)
- FSHOW((stderr, "Transporting weak pointer from 0x%08x\n", object));
-#endif
-
- /* Need to remember where all the weak pointers are that have */
- /* been transported so they can be fixed up in a post-GC pass. */
-
- copy = copy_object(object, WEAK_POINTER_NWORDS);
- /* wp = (struct weak_pointer *) native_pointer(copy);*/
-
-
- /* Push the weak pointer onto the list of weak pointers. */
- /* wp->next = weak_pointers;
- * weak_pointers = wp;*/
-
- return copy;
-}
-
-static int
-size_weak_pointer(lispobj *where)
-{
- return WEAK_POINTER_NWORDS;
-}
-
-void scan_weak_pointers(void)
-{
- struct weak_pointer *wp;
- for (wp = weak_pointers; wp != NULL; wp = wp->next) {
- lispobj value = wp->value;
- lispobj *first_pointer;
-
- first_pointer = (lispobj *)native_pointer(value);
-
- /*
- FSHOW((stderr, "/weak pointer at 0x%08x\n", (unsigned long) wp));
- FSHOW((stderr, "/value: 0x%08x\n", (unsigned long) value));
- */
-
- if (is_lisp_pointer(value) && from_space_p(value)) {
- /* Now, we need to check whether the object has been forwarded. If
- * it has been, the weak pointer is still good and needs to be
- * updated. Otherwise, the weak pointer needs to be nil'ed
- * out. */
- if (first_pointer[0] == 0x01) {
- wp->value = first_pointer[1];
- } else {
- /* Break it. */
- SHOW("broken");
- wp->value = NIL;
- wp->broken = T;
- }
- }
- }
-}
-\f
-/*
- * initialization
- */
-
-static int
-scav_lose(lispobj *where, lispobj object)
-{
- lose("no scavenge function for object 0x%08x", (unsigned long) object);
- return 0; /* bogus return value to satisfy static type checking */
-}
-
-static lispobj
-trans_lose(lispobj object)
-{
- lose("no transport function for object 0x%08x", (unsigned long) object);
- return NIL; /* bogus return value to satisfy static type checking */
-}
-
-static int
-size_lose(lispobj *where)
-{
- lose("no size function for object at 0x%08x", (unsigned long) where);
- return 1; /* bogus return value to satisfy static type checking */
-}
-
-static void
-gc_init_tables(void)
-{
- int i;
-
- /* Set default value in all slots of scavenge table. */
- for (i = 0; i < 256; i++) { /* FIXME: bare constant length, ick! */
- scavtab[i] = scav_lose;
- }
-
- /* For each type which can be selected by the low 3 bits of the tag
- * alone, set multiple entries in our 8-bit scavenge table (one for each
- * possible value of the high 5 bits). */
- for (i = 0; i < 32; i++) { /* FIXME: bare constant length, ick! */
- scavtab[type_EvenFixnum|(i<<3)] = scav_immediate;
- scavtab[type_FunctionPointer|(i<<3)] = scav_function_pointer;
- /* OtherImmediate0 */
- scavtab[type_ListPointer|(i<<3)] = scav_list_pointer;
- scavtab[type_OddFixnum|(i<<3)] = scav_immediate;
- scavtab[type_InstancePointer|(i<<3)] = scav_instance_pointer;
- /* OtherImmediate1 */
- scavtab[type_OtherPointer|(i<<3)] = scav_other_pointer;
- }
-
- /* Other-pointer types (those selected by all eight bits of the tag) get
- * one entry each in the scavenge table. */
- scavtab[type_Bignum] = scav_unboxed;
- scavtab[type_Ratio] = scav_boxed;
- scavtab[type_SingleFloat] = scav_unboxed;
- scavtab[type_DoubleFloat] = scav_unboxed;
-#ifdef type_LongFloat
- scavtab[type_LongFloat] = scav_unboxed;
-#endif
- scavtab[type_Complex] = scav_boxed;
-#ifdef type_ComplexSingleFloat
- scavtab[type_ComplexSingleFloat] = scav_unboxed;
-#endif
-#ifdef type_ComplexDoubleFloat
- scavtab[type_ComplexDoubleFloat] = scav_unboxed;
-#endif
-#ifdef type_ComplexLongFloat
- scavtab[type_ComplexLongFloat] = scav_unboxed;
-#endif
- scavtab[type_SimpleArray] = scav_boxed;
- scavtab[type_SimpleString] = scav_string;
- scavtab[type_SimpleBitVector] = scav_vector_bit;
- scavtab[type_SimpleVector] = scav_vector;
- scavtab[type_SimpleArrayUnsignedByte2] = scav_vector_unsigned_byte_2;
- scavtab[type_SimpleArrayUnsignedByte4] = scav_vector_unsigned_byte_4;
- scavtab[type_SimpleArrayUnsignedByte8] = scav_vector_unsigned_byte_8;
- scavtab[type_SimpleArrayUnsignedByte16] = scav_vector_unsigned_byte_16;
- scavtab[type_SimpleArrayUnsignedByte32] = scav_vector_unsigned_byte_32;
-#ifdef type_SimpleArraySignedByte8
- scavtab[type_SimpleArraySignedByte8] = scav_vector_unsigned_byte_8;
-#endif
-#ifdef type_SimpleArraySignedByte16
- scavtab[type_SimpleArraySignedByte16] = scav_vector_unsigned_byte_16;
-#endif
-#ifdef type_SimpleArraySignedByte30
- scavtab[type_SimpleArraySignedByte30] = scav_vector_unsigned_byte_32;
-#endif
-#ifdef type_SimpleArraySignedByte32
- scavtab[type_SimpleArraySignedByte32] = scav_vector_unsigned_byte_32;
-#endif
- scavtab[type_SimpleArraySingleFloat] = scav_vector_single_float;
- scavtab[type_SimpleArrayDoubleFloat] = scav_vector_double_float;
-#ifdef type_SimpleArrayLongFloat
- scavtab[type_SimpleArrayLongFloat] = scav_vector_long_float;
-#endif
-#ifdef type_SimpleArrayComplexSingleFloat
- scavtab[type_SimpleArrayComplexSingleFloat] = scav_vector_complex_single_float;
-#endif
-#ifdef type_SimpleArrayComplexDoubleFloat
- scavtab[type_SimpleArrayComplexDoubleFloat] = scav_vector_complex_double_float;
-#endif
-#ifdef type_SimpleArrayComplexLongFloat
- scavtab[type_SimpleArrayComplexLongFloat] = scav_vector_complex_long_float;
-#endif
- scavtab[type_ComplexString] = scav_boxed;
- scavtab[type_ComplexBitVector] = scav_boxed;
- scavtab[type_ComplexVector] = scav_boxed;
- scavtab[type_ComplexArray] = scav_boxed;
- scavtab[type_CodeHeader] = scav_code_header;
- /*scavtab[type_FunctionHeader] = scav_function_header;*/
- /*scavtab[type_ClosureFunctionHeader] = scav_function_header;*/
- /*scavtab[type_ReturnPcHeader] = scav_return_pc_header;*/
-#ifdef __i386__
- scavtab[type_ClosureHeader] = scav_closure_header;
- scavtab[type_FuncallableInstanceHeader] = scav_closure_header;
- scavtab[type_ByteCodeFunction] = scav_closure_header;
- scavtab[type_ByteCodeClosure] = scav_closure_header;
-#else
- scavtab[type_ClosureHeader] = scav_boxed;
- scavtab[type_FuncallableInstanceHeader] = scav_boxed;
- scavtab[type_ByteCodeFunction] = scav_boxed;
- scavtab[type_ByteCodeClosure] = scav_boxed;
-#endif
- scavtab[type_ValueCellHeader] = scav_boxed;
- scavtab[type_SymbolHeader] = scav_boxed;
- scavtab[type_BaseChar] = scav_immediate;
- scavtab[type_Sap] = scav_unboxed;
- scavtab[type_UnboundMarker] = scav_immediate;
- scavtab[type_WeakPointer] = scav_weak_pointer;
- scavtab[type_InstanceHeader] = scav_boxed;
- scavtab[type_Fdefn] = scav_fdefn;
-
- /* transport other table, initialized same way as scavtab */
- for (i = 0; i < 256; i++)
- transother[i] = trans_lose;
- transother[type_Bignum] = trans_unboxed;
- transother[type_Ratio] = trans_boxed;
- transother[type_SingleFloat] = trans_unboxed;
- transother[type_DoubleFloat] = trans_unboxed;
-#ifdef type_LongFloat
- transother[type_LongFloat] = trans_unboxed;
-#endif
- transother[type_Complex] = trans_boxed;
-#ifdef type_ComplexSingleFloat
- transother[type_ComplexSingleFloat] = trans_unboxed;
-#endif
-#ifdef type_ComplexDoubleFloat
- transother[type_ComplexDoubleFloat] = trans_unboxed;
-#endif
-#ifdef type_ComplexLongFloat
- transother[type_ComplexLongFloat] = trans_unboxed;
-#endif
- transother[type_SimpleArray] = trans_boxed_large;
- transother[type_SimpleString] = trans_string;
- transother[type_SimpleBitVector] = trans_vector_bit;
- transother[type_SimpleVector] = trans_vector;
- transother[type_SimpleArrayUnsignedByte2] = trans_vector_unsigned_byte_2;
- transother[type_SimpleArrayUnsignedByte4] = trans_vector_unsigned_byte_4;
- transother[type_SimpleArrayUnsignedByte8] = trans_vector_unsigned_byte_8;
- transother[type_SimpleArrayUnsignedByte16] = trans_vector_unsigned_byte_16;
- transother[type_SimpleArrayUnsignedByte32] = trans_vector_unsigned_byte_32;
-#ifdef type_SimpleArraySignedByte8
- transother[type_SimpleArraySignedByte8] = trans_vector_unsigned_byte_8;
-#endif
-#ifdef type_SimpleArraySignedByte16
- transother[type_SimpleArraySignedByte16] = trans_vector_unsigned_byte_16;
-#endif
-#ifdef type_SimpleArraySignedByte30
- transother[type_SimpleArraySignedByte30] = trans_vector_unsigned_byte_32;
-#endif
-#ifdef type_SimpleArraySignedByte32
- transother[type_SimpleArraySignedByte32] = trans_vector_unsigned_byte_32;
-#endif
- transother[type_SimpleArraySingleFloat] = trans_vector_single_float;
- transother[type_SimpleArrayDoubleFloat] = trans_vector_double_float;
-#ifdef type_SimpleArrayLongFloat
- transother[type_SimpleArrayLongFloat] = trans_vector_long_float;
-#endif
-#ifdef type_SimpleArrayComplexSingleFloat
- transother[type_SimpleArrayComplexSingleFloat] = trans_vector_complex_single_float;
-#endif
-#ifdef type_SimpleArrayComplexDoubleFloat
- transother[type_SimpleArrayComplexDoubleFloat] = trans_vector_complex_double_float;
-#endif
-#ifdef type_SimpleArrayComplexLongFloat
- transother[type_SimpleArrayComplexLongFloat] = trans_vector_complex_long_float;
-#endif
- transother[type_ComplexString] = trans_boxed;
- transother[type_ComplexBitVector] = trans_boxed;
- transother[type_ComplexVector] = trans_boxed;
- transother[type_ComplexArray] = trans_boxed;
- transother[type_CodeHeader] = trans_code_header;
- transother[type_FunctionHeader] = trans_function_header;
- transother[type_ClosureFunctionHeader] = trans_function_header;
- transother[type_ReturnPcHeader] = trans_return_pc_header;
- transother[type_ClosureHeader] = trans_boxed;
- transother[type_FuncallableInstanceHeader] = trans_boxed;
- transother[type_ByteCodeFunction] = trans_boxed;
- transother[type_ByteCodeClosure] = trans_boxed;
- transother[type_ValueCellHeader] = trans_boxed;
- transother[type_SymbolHeader] = trans_boxed;
- transother[type_BaseChar] = trans_immediate;
- transother[type_Sap] = trans_unboxed;
- transother[type_UnboundMarker] = trans_immediate;
- transother[type_WeakPointer] = trans_weak_pointer;
- transother[type_InstanceHeader] = trans_boxed;
- transother[type_Fdefn] = trans_boxed;
-
- /* size table, initialized the same way as scavtab */
- for (i = 0; i < 256; i++)
- sizetab[i] = size_lose;
- for (i = 0; i < 32; i++) {
- sizetab[type_EvenFixnum|(i<<3)] = size_immediate;
- sizetab[type_FunctionPointer|(i<<3)] = size_pointer;
- /* OtherImmediate0 */
- sizetab[type_ListPointer|(i<<3)] = size_pointer;
- sizetab[type_OddFixnum|(i<<3)] = size_immediate;
- sizetab[type_InstancePointer|(i<<3)] = size_pointer;
- /* OtherImmediate1 */
- sizetab[type_OtherPointer|(i<<3)] = size_pointer;
- }
- sizetab[type_Bignum] = size_unboxed;
- sizetab[type_Ratio] = size_boxed;
- sizetab[type_SingleFloat] = size_unboxed;
- sizetab[type_DoubleFloat] = size_unboxed;
-#ifdef type_LongFloat
- sizetab[type_LongFloat] = size_unboxed;
-#endif
- sizetab[type_Complex] = size_boxed;
-#ifdef type_ComplexSingleFloat
- sizetab[type_ComplexSingleFloat] = size_unboxed;
-#endif
-#ifdef type_ComplexDoubleFloat
- sizetab[type_ComplexDoubleFloat] = size_unboxed;
-#endif
-#ifdef type_ComplexLongFloat
- sizetab[type_ComplexLongFloat] = size_unboxed;
-#endif
- sizetab[type_SimpleArray] = size_boxed;
- sizetab[type_SimpleString] = size_string;
- sizetab[type_SimpleBitVector] = size_vector_bit;
- sizetab[type_SimpleVector] = size_vector;
- sizetab[type_SimpleArrayUnsignedByte2] = size_vector_unsigned_byte_2;
- sizetab[type_SimpleArrayUnsignedByte4] = size_vector_unsigned_byte_4;
- sizetab[type_SimpleArrayUnsignedByte8] = size_vector_unsigned_byte_8;
- sizetab[type_SimpleArrayUnsignedByte16] = size_vector_unsigned_byte_16;
- sizetab[type_SimpleArrayUnsignedByte32] = size_vector_unsigned_byte_32;
-#ifdef type_SimpleArraySignedByte8
- sizetab[type_SimpleArraySignedByte8] = size_vector_unsigned_byte_8;
-#endif
-#ifdef type_SimpleArraySignedByte16
- sizetab[type_SimpleArraySignedByte16] = size_vector_unsigned_byte_16;
-#endif
-#ifdef type_SimpleArraySignedByte30
- sizetab[type_SimpleArraySignedByte30] = size_vector_unsigned_byte_32;
-#endif
-#ifdef type_SimpleArraySignedByte32
- sizetab[type_SimpleArraySignedByte32] = size_vector_unsigned_byte_32;
-#endif
- sizetab[type_SimpleArraySingleFloat] = size_vector_single_float;
- sizetab[type_SimpleArrayDoubleFloat] = size_vector_double_float;
-#ifdef type_SimpleArrayLongFloat
- sizetab[type_SimpleArrayLongFloat] = size_vector_long_float;
-#endif
-#ifdef type_SimpleArrayComplexSingleFloat
- sizetab[type_SimpleArrayComplexSingleFloat] = size_vector_complex_single_float;
-#endif
-#ifdef type_SimpleArrayComplexDoubleFloat
- sizetab[type_SimpleArrayComplexDoubleFloat] = size_vector_complex_double_float;
-#endif
-#ifdef type_SimpleArrayComplexLongFloat
- sizetab[type_SimpleArrayComplexLongFloat] = size_vector_complex_long_float;
-#endif
- sizetab[type_ComplexString] = size_boxed;
- sizetab[type_ComplexBitVector] = size_boxed;
- sizetab[type_ComplexVector] = size_boxed;
- sizetab[type_ComplexArray] = size_boxed;
- sizetab[type_CodeHeader] = size_code_header;
-#if 0
- /* We shouldn't see these, so just lose if it happens. */
- sizetab[type_FunctionHeader] = size_function_header;
- sizetab[type_ClosureFunctionHeader] = size_function_header;
- sizetab[type_ReturnPcHeader] = size_return_pc_header;
-#endif
- sizetab[type_ClosureHeader] = size_boxed;
- sizetab[type_FuncallableInstanceHeader] = size_boxed;
- sizetab[type_ValueCellHeader] = size_boxed;
- sizetab[type_SymbolHeader] = size_boxed;
- sizetab[type_BaseChar] = size_immediate;
- sizetab[type_Sap] = size_unboxed;
- sizetab[type_UnboundMarker] = size_immediate;
- sizetab[type_WeakPointer] = size_weak_pointer;
- sizetab[type_InstanceHeader] = size_boxed;
- sizetab[type_Fdefn] = size_boxed;
+ }
+ }
+ }
+ }
+ }
+ }
+ return (CEILING(kv_length + 2, 2));
}
+
+
\f
-/* Scan an area looking for an object which encloses the given pointer.
- * Return the object start on success or NULL on failure. */
-static lispobj *
-search_space(lispobj *start, size_t words, lispobj *pointer)
+/*
+ * weak pointers
+ */
+
+/* XX This is a hack adapted from cgc.c. These don't work too
+ * efficiently with the gencgc as a list of the weak pointers is
+ * maintained within the objects which causes writes to the pages. A
+ * limited attempt is made to avoid unnecessary writes, but this needs
+ * a re-think. */
+#define WEAK_POINTER_NWORDS \
+ CEILING((sizeof(struct weak_pointer) / sizeof(lispobj)), 2)
+
+static long
+scav_weak_pointer(lispobj *where, lispobj object)
{
- while (words > 0) {
- size_t count = 1;
- lispobj thing = *start;
-
- /* If thing is an immediate then this is a cons. */
- if (is_lisp_pointer(thing)
- || ((thing & 3) == 0) /* fixnum */
- || (TypeOf(thing) == type_BaseChar)
- || (TypeOf(thing) == type_UnboundMarker))
- count = 2;
- else
- count = (sizetab[TypeOf(thing)])(start);
+ struct weak_pointer *wp = weak_pointers;
+ /* Push the weak pointer onto the list of weak pointers.
+ * Do I have to watch for duplicates? Originally this was
+ * part of trans_weak_pointer but that didn't work in the
+ * case where the WP was in a promoted region.
+ */
- /* Check whether the pointer is within this object. */
- if ((pointer >= start) && (pointer < (start+count))) {
- /* found it! */
- /*FSHOW((stderr,"/found %x in %x %x\n", pointer, start, thing));*/
- return(start);
+ /* Check whether it's already in the list. */
+ while (wp != NULL) {
+ if (wp == (struct weak_pointer*)where) {
+ break;
+ }
+ wp = wp->next;
+ }
+ if (wp == NULL) {
+ /* Add it to the start of the list. */
+ wp = (struct weak_pointer*)where;
+ if (wp->next != weak_pointers) {
+ wp->next = weak_pointers;
+ } else {
+ /*SHOW("avoided write to weak pointer");*/
}
+ weak_pointers = wp;
+ }
- /* Round up the count. */
- count = CEILING(count,2);
+ /* Do not let GC scavenge the value slot of the weak pointer.
+ * (That is why it is a weak pointer.) */
- start += count;
- words -= count;
- }
- return (NULL);
+ return WEAK_POINTER_NWORDS;
}
-static lispobj*
-search_read_only_space(lispobj *pointer)
+\f
+lispobj *
+search_read_only_space(void *pointer)
{
- lispobj* start = (lispobj*)READ_ONLY_SPACE_START;
- lispobj* end = (lispobj*)SymbolValue(READ_ONLY_SPACE_FREE_POINTER);
- if ((pointer < start) || (pointer >= end))
+ lispobj *start = (lispobj *) READ_ONLY_SPACE_START;
+ lispobj *end = (lispobj *) SymbolValue(READ_ONLY_SPACE_FREE_POINTER,0);
+ if ((pointer < (void *)start) || (pointer >= (void *)end))
return NULL;
- return (search_space(start, (pointer+2)-start, pointer));
+ return (gc_search_space(start,
+ (((lispobj *)pointer)+2)-start,
+ (lispobj *) pointer));
}
-static lispobj *
-search_static_space(lispobj *pointer)
+lispobj *
+search_static_space(void *pointer)
{
- lispobj* start = (lispobj*)STATIC_SPACE_START;
- lispobj* end = (lispobj*)SymbolValue(STATIC_SPACE_FREE_POINTER);
- if ((pointer < start) || (pointer >= end))
+ lispobj *start = (lispobj *)STATIC_SPACE_START;
+ lispobj *end = (lispobj *)SymbolValue(STATIC_SPACE_FREE_POINTER,0);
+ if ((pointer < (void *)start) || (pointer >= (void *)end))
return NULL;
- return (search_space(start, (pointer+2)-start, pointer));
+ return (gc_search_space(start,
+ (((lispobj *)pointer)+2)-start,
+ (lispobj *) pointer));
}
/* a faster version for searching the dynamic space. This will work even
* if the object is in a current allocation region. */
lispobj *
-search_dynamic_space(lispobj *pointer)
+search_dynamic_space(void *pointer)
{
- int page_index = find_page_index(pointer);
+ long page_index = find_page_index(pointer);
lispobj *start;
/* The address may be invalid, so do some checks. */
- if ((page_index == -1) || (page_table[page_index].allocated == FREE_PAGE))
+ if ((page_index == -1) ||
+ (page_table[page_index].allocated == FREE_PAGE_FLAG))
return NULL;
start = (lispobj *)((void *)page_address(page_index)
+ page_table[page_index].first_object_offset);
- return (search_space(start, (pointer+2)-start, pointer));
+ return (gc_search_space(start,
+ (((lispobj *)pointer)+2)-start,
+ (lispobj *)pointer));
}
/* Is there any possibility that pointer is a valid Lisp object
* reference, and/or something else (e.g. subroutine call return
- * address) which should prevent us from moving the referred-to thing? */
+ * address) which should prevent us from moving the referred-to thing?
+ * This is called from preserve_pointers() */
static int
possibly_valid_dynamic_space_pointer(lispobj *pointer)
{
/* We need to allow raw pointers into Code objects for return
* addresses. This will also pick up pointers to functions in code
* objects. */
- if (TypeOf(*start_addr) == type_CodeHeader) {
+ if (widetag_of(*start_addr) == CODE_HEADER_WIDETAG) {
/* XXX could do some further checks here */
return 1;
}
/* Check that the object pointed to is consistent with the pointer
* low tag.
- *
- * FIXME: It's not safe to rely on the result from this check
- * before an object is initialized. Thus, if we were interrupted
- * just as an object had been allocated but not initialized, the
- * GC relying on this result could bogusly reclaim the memory.
- * However, we can't really afford to do without this check. So
- * we should make it safe somehow.
- * (1) Perhaps just review the code to make sure
- * that WITHOUT-GCING or WITHOUT-INTERRUPTS or some such
- * thing is wrapped around critical sections where allocated
- * memory type bits haven't been set.
- * (2) Perhaps find some other hack to protect against this, e.g.
- * recording the result of the last call to allocate-lisp-memory,
- * and returning true from this function when *pointer is
- * a reference to that result. */
- switch (LowtagOf((lispobj)pointer)) {
- case type_FunctionPointer:
+ */
+ switch (lowtag_of((lispobj)pointer)) {
+ case FUN_POINTER_LOWTAG:
/* Start_addr should be the enclosing code object, or a closure
* header. */
- switch (TypeOf(*start_addr)) {
- case type_CodeHeader:
+ switch (widetag_of(*start_addr)) {
+ case CODE_HEADER_WIDETAG:
/* This case is probably caught above. */
break;
- case type_ClosureHeader:
- case type_FuncallableInstanceHeader:
- case type_ByteCodeFunction:
- case type_ByteCodeClosure:
+ case CLOSURE_HEADER_WIDETAG:
+ case FUNCALLABLE_INSTANCE_HEADER_WIDETAG:
if ((unsigned)pointer !=
- ((unsigned)start_addr+type_FunctionPointer)) {
+ ((unsigned)start_addr+FUN_POINTER_LOWTAG)) {
if (gencgc_verbose)
FSHOW((stderr,
"/Wf2: %x %x %x\n",
return 0;
}
break;
- case type_ListPointer:
+ case LIST_POINTER_LOWTAG:
if ((unsigned)pointer !=
- ((unsigned)start_addr+type_ListPointer)) {
+ ((unsigned)start_addr+LIST_POINTER_LOWTAG)) {
if (gencgc_verbose)
FSHOW((stderr,
"/Wl1: %x %x %x\n",
}
/* Is it plausible cons? */
if ((is_lisp_pointer(start_addr[0])
- || ((start_addr[0] & 3) == 0) /* fixnum */
- || (TypeOf(start_addr[0]) == type_BaseChar)
- || (TypeOf(start_addr[0]) == type_UnboundMarker))
+ || (fixnump(start_addr[0]))
+ || (widetag_of(start_addr[0]) == CHARACTER_WIDETAG)
+#if N_WORD_BITS == 64
+ || (widetag_of(start_addr[0]) == SINGLE_FLOAT_WIDETAG)
+#endif
+ || (widetag_of(start_addr[0]) == UNBOUND_MARKER_WIDETAG))
&& (is_lisp_pointer(start_addr[1])
- || ((start_addr[1] & 3) == 0) /* fixnum */
- || (TypeOf(start_addr[1]) == type_BaseChar)
- || (TypeOf(start_addr[1]) == type_UnboundMarker)))
+ || (fixnump(start_addr[1]))
+ || (widetag_of(start_addr[1]) == CHARACTER_WIDETAG)
+#if N_WORD_BITS == 64
+ || (widetag_of(start_addr[1]) == SINGLE_FLOAT_WIDETAG)
+#endif
+ || (widetag_of(start_addr[1]) == UNBOUND_MARKER_WIDETAG)))
break;
else {
if (gencgc_verbose)
pointer, start_addr, *start_addr));
return 0;
}
- case type_InstancePointer:
+ case INSTANCE_POINTER_LOWTAG:
if ((unsigned)pointer !=
- ((unsigned)start_addr+type_InstancePointer)) {
+ ((unsigned)start_addr+INSTANCE_POINTER_LOWTAG)) {
if (gencgc_verbose)
FSHOW((stderr,
"/Wi1: %x %x %x\n",
pointer, start_addr, *start_addr));
return 0;
}
- if (TypeOf(start_addr[0]) != type_InstanceHeader) {
+ if (widetag_of(start_addr[0]) != INSTANCE_HEADER_WIDETAG) {
if (gencgc_verbose)
FSHOW((stderr,
"/Wi2: %x %x %x\n",
return 0;
}
break;
- case type_OtherPointer:
+ case OTHER_POINTER_LOWTAG:
if ((unsigned)pointer !=
- ((int)start_addr+type_OtherPointer)) {
+ ((int)start_addr+OTHER_POINTER_LOWTAG)) {
if (gencgc_verbose)
FSHOW((stderr,
"/Wo1: %x %x %x\n",
pointer, start_addr, *start_addr));
return 0;
}
- switch (TypeOf(start_addr[0])) {
- case type_UnboundMarker:
- case type_BaseChar:
+ switch (widetag_of(start_addr[0])) {
+ case UNBOUND_MARKER_WIDETAG:
+ case CHARACTER_WIDETAG:
+#if N_WORD_BITS == 64
+ case SINGLE_FLOAT_WIDETAG:
+#endif
if (gencgc_verbose)
FSHOW((stderr,
"*Wo3: %x %x %x\n",
return 0;
/* only pointed to by function pointers? */
- case type_ClosureHeader:
- case type_FuncallableInstanceHeader:
- case type_ByteCodeFunction:
- case type_ByteCodeClosure:
+ case CLOSURE_HEADER_WIDETAG:
+ case FUNCALLABLE_INSTANCE_HEADER_WIDETAG:
if (gencgc_verbose)
FSHOW((stderr,
"*Wo4: %x %x %x\n",
pointer, start_addr, *start_addr));
return 0;
- case type_InstanceHeader:
+ case INSTANCE_HEADER_WIDETAG:
if (gencgc_verbose)
FSHOW((stderr,
"*Wo5: %x %x %x\n",
return 0;
/* the valid other immediate pointer objects */
- case type_SimpleVector:
- case type_Ratio:
- case type_Complex:
-#ifdef type_ComplexSingleFloat
- case type_ComplexSingleFloat:
+ case SIMPLE_VECTOR_WIDETAG:
+ case RATIO_WIDETAG:
+ case COMPLEX_WIDETAG:
+#ifdef COMPLEX_SINGLE_FLOAT_WIDETAG
+ case COMPLEX_SINGLE_FLOAT_WIDETAG:
+#endif
+#ifdef COMPLEX_DOUBLE_FLOAT_WIDETAG
+ case COMPLEX_DOUBLE_FLOAT_WIDETAG:
+#endif
+#ifdef COMPLEX_LONG_FLOAT_WIDETAG
+ case COMPLEX_LONG_FLOAT_WIDETAG:
+#endif
+ case SIMPLE_ARRAY_WIDETAG:
+ case COMPLEX_BASE_STRING_WIDETAG:
+#ifdef COMPLEX_CHARACTER_STRING_WIDETAG
+ case COMPLEX_CHARACTER_STRING_WIDETAG:
+#endif
+ case COMPLEX_VECTOR_NIL_WIDETAG:
+ case COMPLEX_BIT_VECTOR_WIDETAG:
+ case COMPLEX_VECTOR_WIDETAG:
+ case COMPLEX_ARRAY_WIDETAG:
+ case VALUE_CELL_HEADER_WIDETAG:
+ case SYMBOL_HEADER_WIDETAG:
+ case FDEFN_WIDETAG:
+ case CODE_HEADER_WIDETAG:
+ case BIGNUM_WIDETAG:
+#if N_WORD_BITS != 64
+ case SINGLE_FLOAT_WIDETAG:
+#endif
+ case DOUBLE_FLOAT_WIDETAG:
+#ifdef LONG_FLOAT_WIDETAG
+ case LONG_FLOAT_WIDETAG:
+#endif
+ case SIMPLE_BASE_STRING_WIDETAG:
+#ifdef SIMPLE_CHARACTER_STRING_WIDETAG
+ case SIMPLE_CHARACTER_STRING_WIDETAG:
+#endif
+ case SIMPLE_BIT_VECTOR_WIDETAG:
+ case SIMPLE_ARRAY_NIL_WIDETAG:
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_2_WIDETAG:
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_4_WIDETAG:
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_7_WIDETAG:
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_8_WIDETAG:
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_15_WIDETAG:
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_16_WIDETAG:
+#ifdef SIMPLE_ARRAY_UNSIGNED_BYTE_29_WIDETAG
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_29_WIDETAG:
+#endif
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_31_WIDETAG:
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_32_WIDETAG:
+#ifdef SIMPLE_ARRAY_UNSIGNED_BYTE_60_WIDETAG
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_60_WIDETAG:
#endif
-#ifdef type_ComplexDoubleFloat
- case type_ComplexDoubleFloat:
+#ifdef SIMPLE_ARRAY_UNSIGNED_BYTE_63_WIDETAG
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_63_WIDETAG:
#endif
-#ifdef type_ComplexLongFloat
- case type_ComplexLongFloat:
+#ifdef SIMPLE_ARRAY_UNSIGNED_BYTE_64_WIDETAG
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_64_WIDETAG:
#endif
- case type_SimpleArray:
- case type_ComplexString:
- case type_ComplexBitVector:
- case type_ComplexVector:
- case type_ComplexArray:
- case type_ValueCellHeader:
- case type_SymbolHeader:
- case type_Fdefn:
- case type_CodeHeader:
- case type_Bignum:
- case type_SingleFloat:
- case type_DoubleFloat:
-#ifdef type_LongFloat
- case type_LongFloat:
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_8_WIDETAG
+ case SIMPLE_ARRAY_SIGNED_BYTE_8_WIDETAG:
#endif
- case type_SimpleString:
- case type_SimpleBitVector:
- case type_SimpleArrayUnsignedByte2:
- case type_SimpleArrayUnsignedByte4:
- case type_SimpleArrayUnsignedByte8:
- case type_SimpleArrayUnsignedByte16:
- case type_SimpleArrayUnsignedByte32:
-#ifdef type_SimpleArraySignedByte8
- case type_SimpleArraySignedByte8:
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_16_WIDETAG
+ case SIMPLE_ARRAY_SIGNED_BYTE_16_WIDETAG:
#endif
-#ifdef type_SimpleArraySignedByte16
- case type_SimpleArraySignedByte16:
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_30_WIDETAG
+ case SIMPLE_ARRAY_SIGNED_BYTE_30_WIDETAG:
#endif
-#ifdef type_SimpleArraySignedByte30
- case type_SimpleArraySignedByte30:
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG
+ case SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG:
#endif
-#ifdef type_SimpleArraySignedByte32
- case type_SimpleArraySignedByte32:
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_61_WIDETAG
+ case SIMPLE_ARRAY_SIGNED_BYTE_61_WIDETAG:
#endif
- case type_SimpleArraySingleFloat:
- case type_SimpleArrayDoubleFloat:
-#ifdef type_SimpleArrayLongFloat
- case type_SimpleArrayLongFloat:
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_64_WIDETAG
+ case SIMPLE_ARRAY_SIGNED_BYTE_64_WIDETAG:
#endif
-#ifdef type_SimpleArrayComplexSingleFloat
- case type_SimpleArrayComplexSingleFloat:
+ case SIMPLE_ARRAY_SINGLE_FLOAT_WIDETAG:
+ case SIMPLE_ARRAY_DOUBLE_FLOAT_WIDETAG:
+#ifdef SIMPLE_ARRAY_LONG_FLOAT_WIDETAG
+ case SIMPLE_ARRAY_LONG_FLOAT_WIDETAG:
#endif
-#ifdef type_SimpleArrayComplexDoubleFloat
- case type_SimpleArrayComplexDoubleFloat:
+#ifdef SIMPLE_ARRAY_COMPLEX_SINGLE_FLOAT_WIDETAG
+ case SIMPLE_ARRAY_COMPLEX_SINGLE_FLOAT_WIDETAG:
#endif
-#ifdef type_SimpleArrayComplexLongFloat
- case type_SimpleArrayComplexLongFloat:
+#ifdef SIMPLE_ARRAY_COMPLEX_DOUBLE_FLOAT_WIDETAG
+ case SIMPLE_ARRAY_COMPLEX_DOUBLE_FLOAT_WIDETAG:
#endif
- case type_Sap:
- case type_WeakPointer:
+#ifdef SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG
+ case SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG:
+#endif
+ case SAP_WIDETAG:
+ case WEAK_POINTER_WIDETAG:
break;
default:
static void
maybe_adjust_large_object(lispobj *where)
{
- int first_page;
- int nwords;
+ long first_page;
+ long nwords;
- int remaining_bytes;
- int next_page;
- int bytes_freed;
- int old_bytes_used;
+ long remaining_bytes;
+ long next_page;
+ long bytes_freed;
+ long old_bytes_used;
int boxed;
/* Check whether it's a vector or bignum object. */
- switch (TypeOf(where[0])) {
- case type_SimpleVector:
- boxed = BOXED_PAGE;
+ switch (widetag_of(where[0])) {
+ case SIMPLE_VECTOR_WIDETAG:
+ boxed = BOXED_PAGE_FLAG;
break;
- case type_Bignum:
- case type_SimpleString:
- case type_SimpleBitVector:
- case type_SimpleArrayUnsignedByte2:
- case type_SimpleArrayUnsignedByte4:
- case type_SimpleArrayUnsignedByte8:
- case type_SimpleArrayUnsignedByte16:
- case type_SimpleArrayUnsignedByte32:
-#ifdef type_SimpleArraySignedByte8
- case type_SimpleArraySignedByte8:
+ case BIGNUM_WIDETAG:
+ case SIMPLE_BASE_STRING_WIDETAG:
+#ifdef SIMPLE_CHARACTER_STRING_WIDETAG
+ case SIMPLE_CHARACTER_STRING_WIDETAG:
+#endif
+ case SIMPLE_BIT_VECTOR_WIDETAG:
+ case SIMPLE_ARRAY_NIL_WIDETAG:
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_2_WIDETAG:
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_4_WIDETAG:
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_7_WIDETAG:
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_8_WIDETAG:
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_15_WIDETAG:
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_16_WIDETAG:
+#ifdef SIMPLE_ARRAY_UNSIGNED_BYTE_29_WIDETAG
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_29_WIDETAG:
+#endif
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_31_WIDETAG:
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_32_WIDETAG:
+#ifdef SIMPLE_ARRAY_UNSIGNED_BYTE_60_WIDETAG
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_60_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_UNSIGNED_BYTE_63_WIDETAG
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_63_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_UNSIGNED_BYTE_64_WIDETAG
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_64_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_8_WIDETAG
+ case SIMPLE_ARRAY_SIGNED_BYTE_8_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_16_WIDETAG
+ case SIMPLE_ARRAY_SIGNED_BYTE_16_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_30_WIDETAG
+ case SIMPLE_ARRAY_SIGNED_BYTE_30_WIDETAG:
#endif
-#ifdef type_SimpleArraySignedByte16
- case type_SimpleArraySignedByte16:
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG
+ case SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG:
#endif
-#ifdef type_SimpleArraySignedByte30
- case type_SimpleArraySignedByte30:
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_61_WIDETAG
+ case SIMPLE_ARRAY_SIGNED_BYTE_61_WIDETAG:
#endif
-#ifdef type_SimpleArraySignedByte32
- case type_SimpleArraySignedByte32:
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_64_WIDETAG
+ case SIMPLE_ARRAY_SIGNED_BYTE_64_WIDETAG:
#endif
- case type_SimpleArraySingleFloat:
- case type_SimpleArrayDoubleFloat:
-#ifdef type_SimpleArrayLongFloat
- case type_SimpleArrayLongFloat:
+ case SIMPLE_ARRAY_SINGLE_FLOAT_WIDETAG:
+ case SIMPLE_ARRAY_DOUBLE_FLOAT_WIDETAG:
+#ifdef SIMPLE_ARRAY_LONG_FLOAT_WIDETAG
+ case SIMPLE_ARRAY_LONG_FLOAT_WIDETAG:
#endif
-#ifdef type_SimpleArrayComplexSingleFloat
- case type_SimpleArrayComplexSingleFloat:
+#ifdef SIMPLE_ARRAY_COMPLEX_SINGLE_FLOAT_WIDETAG
+ case SIMPLE_ARRAY_COMPLEX_SINGLE_FLOAT_WIDETAG:
#endif
-#ifdef type_SimpleArrayComplexDoubleFloat
- case type_SimpleArrayComplexDoubleFloat:
+#ifdef SIMPLE_ARRAY_COMPLEX_DOUBLE_FLOAT_WIDETAG
+ case SIMPLE_ARRAY_COMPLEX_DOUBLE_FLOAT_WIDETAG:
#endif
-#ifdef type_SimpleArrayComplexLongFloat
- case type_SimpleArrayComplexLongFloat:
+#ifdef SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG
+ case SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG:
#endif
- boxed = UNBOXED_PAGE;
+ boxed = UNBOXED_PAGE_FLAG;
break;
default:
return;
}
/* Find its current size. */
- nwords = (sizetab[TypeOf(where[0])])(where);
+ nwords = (sizetab[widetag_of(where[0])])(where);
first_page = find_page_index((void *)where);
gc_assert(first_page >= 0);
gc_assert(page_table[first_page].first_object_offset == 0);
next_page = first_page;
- remaining_bytes = nwords*4;
- while (remaining_bytes > 4096) {
+ remaining_bytes = nwords*N_WORD_BYTES;
+ while (remaining_bytes > PAGE_BYTES) {
gc_assert(page_table[next_page].gen == from_space);
- gc_assert((page_table[next_page].allocated == BOXED_PAGE)
- || (page_table[next_page].allocated == UNBOXED_PAGE));
+ gc_assert((page_table[next_page].allocated == BOXED_PAGE_FLAG)
+ || (page_table[next_page].allocated == UNBOXED_PAGE_FLAG));
gc_assert(page_table[next_page].large_object);
gc_assert(page_table[next_page].first_object_offset ==
- -4096*(next_page-first_page));
- gc_assert(page_table[next_page].bytes_used == 4096);
+ -PAGE_BYTES*(next_page-first_page));
+ gc_assert(page_table[next_page].bytes_used == PAGE_BYTES);
page_table[next_page].allocated = boxed;
/* Shouldn't be write-protected at this stage. Essential that the
* pages aren't. */
gc_assert(!page_table[next_page].write_protected);
- remaining_bytes -= 4096;
+ remaining_bytes -= PAGE_BYTES;
next_page++;
}
/* Free any remaining pages; needs care. */
next_page++;
- while ((old_bytes_used == 4096) &&
+ while ((old_bytes_used == PAGE_BYTES) &&
(page_table[next_page].gen == from_space) &&
- ((page_table[next_page].allocated == UNBOXED_PAGE)
- || (page_table[next_page].allocated == BOXED_PAGE)) &&
+ ((page_table[next_page].allocated == UNBOXED_PAGE_FLAG)
+ || (page_table[next_page].allocated == BOXED_PAGE_FLAG)) &&
page_table[next_page].large_object &&
(page_table[next_page].first_object_offset ==
- -(next_page - first_page)*4096)) {
+ -(next_page - first_page)*PAGE_BYTES)) {
/* It checks out OK, free the page. We don't need to both zeroing
* pages as this should have been done before shrinking the
* object. These pages shouldn't be write protected as they
gc_assert(page_table[next_page].write_protected == 0);
old_bytes_used = page_table[next_page].bytes_used;
- page_table[next_page].allocated = FREE_PAGE;
+ page_table[next_page].allocated = FREE_PAGE_FLAG;
page_table[next_page].bytes_used = 0;
bytes_freed += old_bytes_used;
next_page++;
* page_table so that it will not be relocated during a GC.
*
* This involves locating the page it points to, then backing up to
- * the first page that has its first object start at offset 0, and
- * then marking all pages dont_move from the first until a page that
- * ends by being full, or having free gen.
- *
- * This ensures that objects spanning pages are not broken.
+ * the start of its region, then marking all pages dont_move from there
+ * up to the first page that's not full or has a different generation
*
* It is assumed that all the page static flags have been cleared at
* the start of a GC.
static void
preserve_pointer(void *addr)
{
- int addr_page_index = find_page_index(addr);
- int first_page;
- int i;
+ long addr_page_index = find_page_index(addr);
+ long first_page;
+ long i;
unsigned region_allocation;
/* quick check 1: Address is quite likely to have been invalid. */
if ((addr_page_index == -1)
- || (page_table[addr_page_index].allocated == FREE_PAGE)
+ || (page_table[addr_page_index].allocated == FREE_PAGE_FLAG)
|| (page_table[addr_page_index].bytes_used == 0)
|| (page_table[addr_page_index].gen != from_space)
/* Skip if already marked dont_move. */
|| (page_table[addr_page_index].dont_move != 0))
return;
-
+ gc_assert(!(page_table[addr_page_index].allocated&OPEN_REGION_PAGE_FLAG));
/* (Now that we know that addr_page_index is in range, it's
* safe to index into page_table[] with it.) */
region_allocation = page_table[addr_page_index].allocated;
/* quick check 2: Check the offset within the page.
*
- * FIXME: The mask should have a symbolic name, and ideally should
- * be derived from page size instead of hardwired to 0xfff.
- * (Also fix other uses of 0xfff, elsewhere.) */
- if (((unsigned)addr & 0xfff) > page_table[addr_page_index].bytes_used)
+ */
+ if (((unsigned)addr & (PAGE_BYTES - 1)) > page_table[addr_page_index].bytes_used)
return;
/* Filter out anything which can't be a pointer to a Lisp object
* (or, as a special case which also requires dont_move, a return
* address referring to something in a CodeObject). This is
* expensive but important, since it vastly reduces the
- * probability that random garbage will be bogusly interpreter as
+ * probability that random garbage will be bogusly interpreted as
* a pointer which prevents a page from moving. */
- if (!possibly_valid_dynamic_space_pointer(addr))
+ if (!(possibly_valid_dynamic_space_pointer(addr)))
return;
- /* Work backwards to find a page with a first_object_offset of 0.
- * The pages should be contiguous with all bytes used in the same
- * gen. Assumes the first_object_offset is negative or zero. */
+ /* Find the beginning of the region. Note that there may be
+ * objects in the region preceding the one that we were passed a
+ * pointer to: if this is the case, we will write-protect all the
+ * previous objects' pages too. */
+
+#if 0
+ /* I think this'd work just as well, but without the assertions.
+ * -dan 2004.01.01 */
+ first_page=
+ find_page_index(page_address(addr_page_index)+
+ page_table[addr_page_index].first_object_offset);
+#else
first_page = addr_page_index;
while (page_table[first_page].first_object_offset != 0) {
--first_page;
/* Do some checks. */
- gc_assert(page_table[first_page].bytes_used == 4096);
+ gc_assert(page_table[first_page].bytes_used == PAGE_BYTES);
gc_assert(page_table[first_page].gen == from_space);
gc_assert(page_table[first_page].allocated == region_allocation);
}
+#endif
/* Adjust any large objects before promotion as they won't be
* copied after promotion. */
* free area in which case it's ignored here. Note it gets
* through the valid pointer test above because the tail looks
* like conses. */
- if ((page_table[addr_page_index].allocated == FREE_PAGE)
+ if ((page_table[addr_page_index].allocated == FREE_PAGE_FLAG)
|| (page_table[addr_page_index].bytes_used == 0)
/* Check the offset within the page. */
- || (((unsigned)addr & 0xfff)
+ || (((unsigned)addr & (PAGE_BYTES - 1))
> page_table[addr_page_index].bytes_used)) {
FSHOW((stderr,
"weird? ignore ptr 0x%x to freed area of large object\n",
gc_assert(!page_table[i].write_protected);
/* Check whether this is the last page in this contiguous block.. */
- if ((page_table[i].bytes_used < 4096)
- /* ..or it is 4096 and is the last in the block */
- || (page_table[i+1].allocated == FREE_PAGE)
+ if ((page_table[i].bytes_used < PAGE_BYTES)
+ /* ..or it is PAGE_BYTES and is the last in the block */
+ || (page_table[i+1].allocated == FREE_PAGE_FLAG)
|| (page_table[i+1].bytes_used == 0) /* next page free */
|| (page_table[i+1].gen != from_space) /* diff. gen */
|| (page_table[i+1].first_object_offset == 0))
*
* We return 1 if the page was write-protected, else 0. */
static int
-update_page_write_prot(int page)
+update_page_write_prot(long page)
{
int gen = page_table[page].gen;
- int j;
+ long j;
int wp_it = 1;
void **page_addr = (void **)page_address(page);
- int num_words = page_table[page].bytes_used / 4;
+ long num_words = page_table[page].bytes_used / N_WORD_BYTES;
/* Shouldn't be a free page. */
- gc_assert(page_table[page].allocated != FREE_PAGE);
+ gc_assert(page_table[page].allocated != FREE_PAGE_FLAG);
gc_assert(page_table[page].bytes_used != 0);
- /* Skip if it's already write-protected or an unboxed page. */
+ /* Skip if it's already write-protected, pinned, or unboxed */
if (page_table[page].write_protected
- || (page_table[page].allocated == UNBOXED_PAGE))
+ || page_table[page].dont_move
+ || (page_table[page].allocated & UNBOXED_PAGE_FLAG))
return (0);
/* Scan the page for pointers to younger generations or the
for (j = 0; j < num_words; j++) {
void *ptr = *(page_addr+j);
- int index = find_page_index(ptr);
+ long index = find_page_index(ptr);
/* Check that it's in the dynamic space */
if (index != -1)
if (/* Does it point to a younger or the temp. generation? */
- ((page_table[index].allocated != FREE_PAGE)
+ ((page_table[index].allocated != FREE_PAGE_FLAG)
&& (page_table[index].bytes_used != 0)
&& ((page_table[index].gen < gen)
|| (page_table[index].gen == NUM_GENERATIONS)))
/*FSHOW((stderr, "/write-protecting page %d gen %d\n", page, gen));*/
os_protect((void *)page_addr,
- 4096,
+ PAGE_BYTES,
OS_VM_PROT_READ|OS_VM_PROT_EXECUTE);
/* Note the page as protected in the page tables. */
/* Scavenge a generation.
*
* This will not resolve all pointers when generation is the new
- * space, as new objects may be added which are not check here - use
+ * space, as new objects may be added which are not checked here - use
* scavenge_newspace generation.
*
* Write-protected pages should not have any pointers to the
static void
scavenge_generation(int generation)
{
- int i;
+ long i;
int num_wp = 0;
#define SC_GEN_CK 0
#endif
for (i = 0; i < last_free_page; i++) {
- if ((page_table[i].allocated == BOXED_PAGE)
+ if ((page_table[i].allocated & BOXED_PAGE_FLAG)
&& (page_table[i].bytes_used != 0)
&& (page_table[i].gen == generation)) {
- int last_page;
+ long last_page,j;
+ int write_protected=1;
- /* This should be the start of a contiguous block. */
+ /* This should be the start of a region */
gc_assert(page_table[i].first_object_offset == 0);
- /* We need to find the full extent of this contiguous
- * block in case objects span pages. */
-
- /* Now work forward until the end of this contiguous area
- * is found. A small area is preferred as there is a
- * better chance of its pages being write-protected. */
- for (last_page = i; ; last_page++)
- /* Check whether this is the last page in this contiguous
- * block. */
- if ((page_table[last_page].bytes_used < 4096)
- /* Or it is 4096 and is the last in the block */
- || (page_table[last_page+1].allocated != BOXED_PAGE)
+ /* Now work forward until the end of the region */
+ for (last_page = i; ; last_page++) {
+ write_protected =
+ write_protected && page_table[last_page].write_protected;
+ if ((page_table[last_page].bytes_used < PAGE_BYTES)
+ /* Or it is PAGE_BYTES and is the last in the block */
+ || (!(page_table[last_page+1].allocated & BOXED_PAGE_FLAG))
|| (page_table[last_page+1].bytes_used == 0)
|| (page_table[last_page+1].gen != generation)
|| (page_table[last_page+1].first_object_offset == 0))
break;
-
- /* Do a limited check for write_protected pages. If all pages
- * are write_protected then there is no need to scavenge. */
- {
- int j, all_wp = 1;
- for (j = i; j <= last_page; j++)
- if (page_table[j].write_protected == 0) {
- all_wp = 0;
- break;
- }
-#if !SC_GEN_CK
- if (all_wp == 0)
-#endif
- {
- scavenge(page_address(i), (page_table[last_page].bytes_used
- + (last_page-i)*4096)/4);
-
- /* Now scan the pages and write protect those
- * that don't have pointers to younger
- * generations. */
- if (enable_page_protection) {
- for (j = i; j <= last_page; j++) {
- num_wp += update_page_write_prot(j);
- }
- }
+ }
+ if (!write_protected) {
+ scavenge(page_address(i),
+ (page_table[last_page].bytes_used +
+ (last_page-i)*PAGE_BYTES)/N_WORD_BYTES);
+
+ /* Now scan the pages and write protect those that
+ * don't have pointers to younger generations. */
+ if (enable_page_protection) {
+ for (j = i; j <= last_page; j++) {
+ num_wp += update_page_write_prot(j);
}
+ }
}
i = last_page;
}
}
-
if ((gencgc_verbose > 1) && (num_wp != 0)) {
FSHOW((stderr,
"/write protected %d pages within generation %d\n",
/* Check that none of the write_protected pages in this generation
* have been written to. */
for (i = 0; i < NUM_PAGES; i++) {
- if ((page_table[i].allocation ! =FREE_PAGE)
+ if ((page_table[i].allocation != FREE_PAGE_FLAG)
&& (page_table[i].bytes_used != 0)
&& (page_table[i].gen == generation)
&& (page_table[i].write_protected_cleared != 0)) {
static void
scavenge_newspace_generation_one_scan(int generation)
{
- int i;
+ long i;
FSHOW((stderr,
"/starting one full scan of newspace generation %d\n",
generation));
-
for (i = 0; i < last_free_page; i++) {
- if ((page_table[i].allocated == BOXED_PAGE)
+ /* Note that this skips over open regions when it encounters them. */
+ if ((page_table[i].allocated & BOXED_PAGE_FLAG)
&& (page_table[i].bytes_used != 0)
&& (page_table[i].gen == generation)
&& ((page_table[i].write_protected == 0)
/* (This may be redundant as write_protected is now
* cleared before promotion.) */
|| (page_table[i].dont_move == 1))) {
- int last_page;
+ long last_page;
+ int all_wp=1;
/* The scavenge will start at the first_object_offset of page i.
*
* is found. A small area is preferred as there is a
* better chance of its pages being write-protected. */
for (last_page = i; ;last_page++) {
+ /* If all pages are write-protected and movable,
+ * then no need to scavenge */
+ all_wp=all_wp && page_table[last_page].write_protected &&
+ !page_table[last_page].dont_move;
+
/* Check whether this is the last page in this
* contiguous block */
- if ((page_table[last_page].bytes_used < 4096)
- /* Or it is 4096 and is the last in the block */
- || (page_table[last_page+1].allocated != BOXED_PAGE)
+ if ((page_table[last_page].bytes_used < PAGE_BYTES)
+ /* Or it is PAGE_BYTES and is the last in the block */
+ || (!(page_table[last_page+1].allocated & BOXED_PAGE_FLAG))
|| (page_table[last_page+1].bytes_used == 0)
|| (page_table[last_page+1].gen != generation)
|| (page_table[last_page+1].first_object_offset == 0))
break;
}
- /* Do a limited check for write-protected pages. If all
- * pages are write-protected then no need to scavenge,
- * except if the pages are marked dont_move. */
- {
- int j, all_wp = 1;
- for (j = i; j <= last_page; j++)
- if ((page_table[j].write_protected == 0)
- || (page_table[j].dont_move != 0)) {
- all_wp = 0;
- break;
- }
-
- if (!all_wp) {
- int size;
-
- /* Calculate the size. */
- if (last_page == i)
- size = (page_table[last_page].bytes_used
- - page_table[i].first_object_offset)/4;
- else
- size = (page_table[last_page].bytes_used
- + (last_page-i)*4096
- - page_table[i].first_object_offset)/4;
-
- {
- new_areas_ignore_page = last_page;
-
- scavenge(page_address(i) +
- page_table[i].first_object_offset,
- size);
-
- }
- }
+ /* Do a limited check for write-protected pages. */
+ if (!all_wp) {
+ long size;
+
+ size = (page_table[last_page].bytes_used
+ + (last_page-i)*PAGE_BYTES
+ - page_table[i].first_object_offset)/N_WORD_BYTES;
+ new_areas_ignore_page = last_page;
+
+ scavenge(page_address(i) +
+ page_table[i].first_object_offset,
+ size);
+
}
-
i = last_page;
}
}
static void
scavenge_newspace_generation(int generation)
{
- int i;
+ long i;
/* the new_areas array currently being written to by gc_alloc() */
struct new_area (*current_new_areas)[] = &new_areas_1;
- int current_new_areas_index;
+ long current_new_areas_index;
- /* the new_areas created but the previous scavenge cycle */
+ /* the new_areas created by the previous scavenge cycle */
struct new_area (*previous_new_areas)[] = NULL;
- int previous_new_areas_index;
+ long previous_new_areas_index;
/* Flush the current regions updating the tables. */
- gc_alloc_update_page_tables(0, &boxed_region);
- gc_alloc_update_page_tables(1, &unboxed_region);
+ gc_alloc_update_all_page_tables();
/* Turn on the recording of new areas by gc_alloc(). */
new_areas = current_new_areas;
record_new_objects = 2;
/* Flush the current regions updating the tables. */
- gc_alloc_update_page_tables(0, &boxed_region);
- gc_alloc_update_page_tables(1, &unboxed_region);
+ gc_alloc_update_all_page_tables();
/* Grab new_areas_index. */
current_new_areas_index = new_areas_index;
record_new_objects = 2;
/* Flush the current regions updating the tables. */
- gc_alloc_update_page_tables(0, &boxed_region);
- gc_alloc_update_page_tables(1, &unboxed_region);
+ gc_alloc_update_all_page_tables();
} else {
/* Work through previous_new_areas. */
for (i = 0; i < previous_new_areas_index; i++) {
- /* FIXME: All these bare *4 and /4 should be something
- * like BYTES_PER_WORD or WBYTES. */
- int page = (*previous_new_areas)[i].page;
- int offset = (*previous_new_areas)[i].offset;
- int size = (*previous_new_areas)[i].size / 4;
- gc_assert((*previous_new_areas)[i].size % 4 == 0);
-
+ long page = (*previous_new_areas)[i].page;
+ long offset = (*previous_new_areas)[i].offset;
+ long size = (*previous_new_areas)[i].size / N_WORD_BYTES;
+ gc_assert((*previous_new_areas)[i].size % N_WORD_BYTES == 0);
scavenge(page_address(page)+offset, size);
}
/* Flush the current regions updating the tables. */
- gc_alloc_update_page_tables(0, &boxed_region);
- gc_alloc_update_page_tables(1, &unboxed_region);
+ gc_alloc_update_all_page_tables();
}
current_new_areas_index = new_areas_index;
/* Check that none of the write_protected pages in this generation
* have been written to. */
for (i = 0; i < NUM_PAGES; i++) {
- if ((page_table[i].allocation != FREE_PAGE)
+ if ((page_table[i].allocation != FREE_PAGE_FLAG)
&& (page_table[i].bytes_used != 0)
&& (page_table[i].gen == generation)
&& (page_table[i].write_protected_cleared != 0)
static void
unprotect_oldspace(void)
{
- int i;
+ long i;
for (i = 0; i < last_free_page; i++) {
- if ((page_table[i].allocated != FREE_PAGE)
+ if ((page_table[i].allocated != FREE_PAGE_FLAG)
&& (page_table[i].bytes_used != 0)
&& (page_table[i].gen == from_space)) {
void *page_start;
/* Remove any write-protection. We should be able to rely
* on the write-protect flag to avoid redundant calls. */
if (page_table[i].write_protected) {
- os_protect(page_start, 4096, OS_VM_PROT_ALL);
+ os_protect(page_start, PAGE_BYTES, OS_VM_PROT_ALL);
page_table[i].write_protected = 0;
}
}
* assumes that all objects have been copied or promoted to an older
* generation. Bytes_allocated and the generation bytes_allocated
* counter are updated. The number of bytes freed is returned. */
-extern void i586_bzero(void *addr, int nbytes);
-static int
+static long
free_oldspace(void)
{
- int bytes_freed = 0;
- int first_page, last_page;
+ long bytes_freed = 0;
+ long first_page, last_page;
first_page = 0;
do {
/* Find a first page for the next region of pages. */
while ((first_page < last_free_page)
- && ((page_table[first_page].allocated == FREE_PAGE)
+ && ((page_table[first_page].allocated == FREE_PAGE_FLAG)
|| (page_table[first_page].bytes_used == 0)
|| (page_table[first_page].gen != from_space)))
first_page++;
bytes_freed += page_table[last_page].bytes_used;
generations[page_table[last_page].gen].bytes_allocated -=
page_table[last_page].bytes_used;
- page_table[last_page].allocated = FREE_PAGE;
+ page_table[last_page].allocated = FREE_PAGE_FLAG;
page_table[last_page].bytes_used = 0;
/* Remove any write-protection. We should be able to rely
void *page_start = (void *)page_address(last_page);
if (page_table[last_page].write_protected) {
- os_protect(page_start, 4096, OS_VM_PROT_ALL);
+ os_protect(page_start, PAGE_BYTES, OS_VM_PROT_ALL);
page_table[last_page].write_protected = 0;
}
}
last_page++;
}
while ((last_page < last_free_page)
- && (page_table[last_page].allocated != FREE_PAGE)
+ && (page_table[last_page].allocated != FREE_PAGE_FLAG)
&& (page_table[last_page].bytes_used != 0)
&& (page_table[last_page].gen == from_space));
page_start = (void *)page_address(first_page);
- os_invalidate(page_start, 4096*(last_page-first_page));
- addr = os_validate(page_start, 4096*(last_page-first_page));
+ os_invalidate(page_start, PAGE_BYTES*(last_page-first_page));
+ addr = os_validate(page_start, PAGE_BYTES*(last_page-first_page));
if (addr == NULL || addr != page_start) {
- /* Is this an error condition? I couldn't really tell from
- * the old CMU CL code, which fprintf'ed a message with
- * an exclamation point at the end. But I've never seen the
- * message, so it must at least be unusual..
- *
- * (The same condition is also tested for in gc_free_heap.)
- *
- * -- WHN 19991129 */
- lose("i586_bzero: page moved, 0x%08x ==> 0x%08x",
- page_start,
+ lose("free_oldspace: page moved, 0x%08x ==> 0x%08x",page_start,
addr);
}
} else {
- int *page_start;
+ long *page_start;
- page_start = (int *)page_address(first_page);
- i586_bzero(page_start, 4096*(last_page-first_page));
+ page_start = (long *)page_address(first_page);
+ memset(page_start, 0,PAGE_BYTES*(last_page-first_page));
}
first_page = last_page;
print_ptr(lispobj *addr)
{
/* If addr is in the dynamic space then out the page information. */
- int pi1 = find_page_index((void*)addr);
+ long pi1 = find_page_index((void*)addr);
if (pi1 != -1)
fprintf(stderr," %x: page %d alloc %d gen %d bytes_used %d offset %d dont_move %d\n",
- (unsigned int) addr,
+ (unsigned long) addr,
pi1,
page_table[pi1].allocated,
page_table[pi1].gen,
}
#endif
-extern int undefined_tramp;
+extern long undefined_tramp;
static void
verify_space(lispobj *start, size_t words)
int is_in_dynamic_space = (find_page_index((void*)start) != -1);
int is_in_readonly_space =
(READ_ONLY_SPACE_START <= (unsigned)start &&
- (unsigned)start < SymbolValue(READ_ONLY_SPACE_FREE_POINTER));
+ (unsigned)start < SymbolValue(READ_ONLY_SPACE_FREE_POINTER,0));
while (words > 0) {
size_t count = 1;
lispobj thing = *(lispobj*)start;
if (is_lisp_pointer(thing)) {
- int page_index = find_page_index((void*)thing);
- int to_readonly_space =
+ long page_index = find_page_index((void*)thing);
+ long to_readonly_space =
(READ_ONLY_SPACE_START <= thing &&
- thing < SymbolValue(READ_ONLY_SPACE_FREE_POINTER));
- int to_static_space =
+ thing < SymbolValue(READ_ONLY_SPACE_FREE_POINTER,0));
+ long to_static_space =
(STATIC_SPACE_START <= thing &&
- thing < SymbolValue(STATIC_SPACE_FREE_POINTER));
+ thing < SymbolValue(STATIC_SPACE_FREE_POINTER,0));
/* Does it point to the dynamic space? */
if (page_index != -1) {
/* If it's within the dynamic space it should point to a used
* page. XX Could check the offset too. */
- if ((page_table[page_index].allocated != FREE_PAGE)
+ if ((page_table[page_index].allocated != FREE_PAGE_FLAG)
&& (page_table[page_index].bytes_used == 0))
lose ("Ptr %x @ %x sees free page.", thing, start);
/* Check that it doesn't point to a forwarding pointer! */
/* Does it point to a plausible object? This check slows
* it down a lot (so it's commented out).
*
- * FIXME: Add a variable to enable this dynamically. */
- /* if (!possibly_valid_dynamic_space_pointer((lispobj *)thing)) {
- * lose("ptr %x to invalid object %x", thing, start); */
+ * "a lot" is serious: it ate 50 minutes cpu time on
+ * my duron 950 before I came back from lunch and
+ * killed it.
+ *
+ * FIXME: Add a variable to enable this
+ * dynamically. */
+ /*
+ if (!possibly_valid_dynamic_space_pointer((lispobj *)thing)) {
+ lose("ptr %x to invalid object %x", thing, start);
+ }
+ */
} else {
/* Verify that it points to another valid space. */
if (!to_readonly_space && !to_static_space
}
}
} else {
- if (thing & 0x3) { /* Skip fixnums. FIXME: There should be an
- * is_fixnum for this. */
-
- switch(TypeOf(*start)) {
+ if (!(fixnump(thing))) {
+ /* skip fixnums */
+ switch(widetag_of(*start)) {
/* boxed objects */
- case type_SimpleVector:
- case type_Ratio:
- case type_Complex:
- case type_SimpleArray:
- case type_ComplexString:
- case type_ComplexBitVector:
- case type_ComplexVector:
- case type_ComplexArray:
- case type_ClosureHeader:
- case type_FuncallableInstanceHeader:
- case type_ByteCodeFunction:
- case type_ByteCodeClosure:
- case type_ValueCellHeader:
- case type_SymbolHeader:
- case type_BaseChar:
- case type_UnboundMarker:
- case type_InstanceHeader:
- case type_Fdefn:
+ case SIMPLE_VECTOR_WIDETAG:
+ case RATIO_WIDETAG:
+ case COMPLEX_WIDETAG:
+ case SIMPLE_ARRAY_WIDETAG:
+ case COMPLEX_BASE_STRING_WIDETAG:
+#ifdef COMPLEX_CHARACTER_STRING_WIDETAG
+ case COMPLEX_CHARACTER_STRING_WIDETAG:
+#endif
+ case COMPLEX_VECTOR_NIL_WIDETAG:
+ case COMPLEX_BIT_VECTOR_WIDETAG:
+ case COMPLEX_VECTOR_WIDETAG:
+ case COMPLEX_ARRAY_WIDETAG:
+ case CLOSURE_HEADER_WIDETAG:
+ case FUNCALLABLE_INSTANCE_HEADER_WIDETAG:
+ case VALUE_CELL_HEADER_WIDETAG:
+ case SYMBOL_HEADER_WIDETAG:
+ case CHARACTER_WIDETAG:
+#if N_WORD_BITS == 64
+ case SINGLE_FLOAT_WIDETAG:
+#endif
+ case UNBOUND_MARKER_WIDETAG:
+ case INSTANCE_HEADER_WIDETAG:
+ case FDEFN_WIDETAG:
count = 1;
break;
- case type_CodeHeader:
+ case CODE_HEADER_WIDETAG:
{
lispobj object = *start;
struct code *code;
- int nheader_words, ncode_words, nwords;
+ long nheader_words, ncode_words, nwords;
lispobj fheaderl;
- struct function *fheaderp;
+ struct simple_fun *fheaderp;
code = (struct code *) start;
if (is_in_dynamic_space
/* It's ok if it's byte compiled code. The trace
* table offset will be a fixnum if it's x86
- * compiled code - check. */
- && !(code->trace_table_offset & 0x3)
+ * compiled code - check.
+ *
+ * FIXME: #^#@@! lack of abstraction here..
+ * This line can probably go away now that
+ * there's no byte compiler, but I've got
+ * too much to worry about right now to try
+ * to make sure. -- WHN 2001-10-06 */
+ && fixnump(code->trace_table_offset)
/* Only when enabled */
&& verify_dynamic_code_check) {
FSHOW((stderr,
/* Scavenge the boxed section of the code data block */
verify_space(start + 1, nheader_words - 1);
- /* Scavenge the boxed section of each function object in
- * the code data block. */
+ /* Scavenge the boxed section of each function
+ * object in the code data block. */
fheaderl = code->entry_points;
while (fheaderl != NIL) {
- fheaderp = (struct function *) native_pointer(fheaderl);
- gc_assert(TypeOf(fheaderp->header) == type_FunctionHeader);
+ fheaderp =
+ (struct simple_fun *) native_pointer(fheaderl);
+ gc_assert(widetag_of(fheaderp->header) == SIMPLE_FUN_HEADER_WIDETAG);
verify_space(&fheaderp->name, 1);
verify_space(&fheaderp->arglist, 1);
verify_space(&fheaderp->type, 1);
}
/* unboxed objects */
- case type_Bignum:
- case type_SingleFloat:
- case type_DoubleFloat:
-#ifdef type_ComplexLongFloat
- case type_LongFloat:
+ case BIGNUM_WIDETAG:
+#if N_WORD_BITS != 64
+ case SINGLE_FLOAT_WIDETAG:
+#endif
+ case DOUBLE_FLOAT_WIDETAG:
+#ifdef COMPLEX_LONG_FLOAT_WIDETAG
+ case LONG_FLOAT_WIDETAG:
+#endif
+#ifdef COMPLEX_SINGLE_FLOAT_WIDETAG
+ case COMPLEX_SINGLE_FLOAT_WIDETAG:
+#endif
+#ifdef COMPLEX_DOUBLE_FLOAT_WIDETAG
+ case COMPLEX_DOUBLE_FLOAT_WIDETAG:
#endif
-#ifdef type_ComplexSingleFloat
- case type_ComplexSingleFloat:
+#ifdef COMPLEX_LONG_FLOAT_WIDETAG
+ case COMPLEX_LONG_FLOAT_WIDETAG:
#endif
-#ifdef type_ComplexDoubleFloat
- case type_ComplexDoubleFloat:
+ case SIMPLE_BASE_STRING_WIDETAG:
+#ifdef SIMPLE_CHARACTER_STRING_WIDETAG
+ case SIMPLE_CHARACTER_STRING_WIDETAG:
#endif
-#ifdef type_ComplexLongFloat
- case type_ComplexLongFloat:
+ case SIMPLE_BIT_VECTOR_WIDETAG:
+ case SIMPLE_ARRAY_NIL_WIDETAG:
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_2_WIDETAG:
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_4_WIDETAG:
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_7_WIDETAG:
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_8_WIDETAG:
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_15_WIDETAG:
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_16_WIDETAG:
+#ifdef SIMPLE_ARRAY_UNSIGNED_BYTE_29_WIDETAG
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_29_WIDETAG:
#endif
- case type_SimpleString:
- case type_SimpleBitVector:
- case type_SimpleArrayUnsignedByte2:
- case type_SimpleArrayUnsignedByte4:
- case type_SimpleArrayUnsignedByte8:
- case type_SimpleArrayUnsignedByte16:
- case type_SimpleArrayUnsignedByte32:
-#ifdef type_SimpleArraySignedByte8
- case type_SimpleArraySignedByte8:
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_31_WIDETAG:
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_32_WIDETAG:
+#ifdef SIMPLE_ARRAY_UNSIGNED_BYTE_60_WIDETAG
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_60_WIDETAG:
#endif
-#ifdef type_SimpleArraySignedByte16
- case type_SimpleArraySignedByte16:
+#ifdef SIMPLE_ARRAY_UNSIGNED_BYTE_63_WIDETAG
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_63_WIDETAG:
#endif
-#ifdef type_SimpleArraySignedByte30
- case type_SimpleArraySignedByte30:
+#ifdef SIMPLE_ARRAY_UNSIGNED_BYTE_64_WIDETAG
+ case SIMPLE_ARRAY_UNSIGNED_BYTE_64_WIDETAG:
#endif
-#ifdef type_SimpleArraySignedByte32
- case type_SimpleArraySignedByte32:
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_8_WIDETAG
+ case SIMPLE_ARRAY_SIGNED_BYTE_8_WIDETAG:
#endif
- case type_SimpleArraySingleFloat:
- case type_SimpleArrayDoubleFloat:
-#ifdef type_SimpleArrayComplexLongFloat
- case type_SimpleArrayLongFloat:
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_16_WIDETAG
+ case SIMPLE_ARRAY_SIGNED_BYTE_16_WIDETAG:
#endif
-#ifdef type_SimpleArrayComplexSingleFloat
- case type_SimpleArrayComplexSingleFloat:
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_30_WIDETAG
+ case SIMPLE_ARRAY_SIGNED_BYTE_30_WIDETAG:
#endif
-#ifdef type_SimpleArrayComplexDoubleFloat
- case type_SimpleArrayComplexDoubleFloat:
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG
+ case SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG:
#endif
-#ifdef type_SimpleArrayComplexLongFloat
- case type_SimpleArrayComplexLongFloat:
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_61_WIDETAG
+ case SIMPLE_ARRAY_SIGNED_BYTE_61_WIDETAG:
#endif
- case type_Sap:
- case type_WeakPointer:
- count = (sizetab[TypeOf(*start)])(start);
+#ifdef SIMPLE_ARRAY_SIGNED_BYTE_64_WIDETAG
+ case SIMPLE_ARRAY_SIGNED_BYTE_64_WIDETAG:
+#endif
+ case SIMPLE_ARRAY_SINGLE_FLOAT_WIDETAG:
+ case SIMPLE_ARRAY_DOUBLE_FLOAT_WIDETAG:
+#ifdef SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG
+ case SIMPLE_ARRAY_LONG_FLOAT_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_COMPLEX_SINGLE_FLOAT_WIDETAG
+ case SIMPLE_ARRAY_COMPLEX_SINGLE_FLOAT_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_COMPLEX_DOUBLE_FLOAT_WIDETAG
+ case SIMPLE_ARRAY_COMPLEX_DOUBLE_FLOAT_WIDETAG:
+#endif
+#ifdef SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG
+ case SIMPLE_ARRAY_COMPLEX_LONG_FLOAT_WIDETAG:
+#endif
+ case SAP_WIDETAG:
+ case WEAK_POINTER_WIDETAG:
+ count = (sizetab[widetag_of(*start)])(start);
break;
default:
* Some counts of lispobjs are called foo_count; it might be good
* to grep for all foo_size and rename the appropriate ones to
* foo_count. */
- int read_only_space_size =
- (lispobj*)SymbolValue(READ_ONLY_SPACE_FREE_POINTER)
+ long read_only_space_size =
+ (lispobj*)SymbolValue(READ_ONLY_SPACE_FREE_POINTER,0)
- (lispobj*)READ_ONLY_SPACE_START;
- int static_space_size =
- (lispobj*)SymbolValue(STATIC_SPACE_FREE_POINTER)
+ long static_space_size =
+ (lispobj*)SymbolValue(STATIC_SPACE_FREE_POINTER,0)
- (lispobj*)STATIC_SPACE_START;
- int binding_stack_size =
- (lispobj*)SymbolValue(BINDING_STACK_POINTER)
- - (lispobj*)BINDING_STACK_START;
-
+ struct thread *th;
+ for_each_thread(th) {
+ long binding_stack_size =
+ (lispobj*)SymbolValue(BINDING_STACK_POINTER,th)
+ - (lispobj*)th->binding_stack_start;
+ verify_space(th->binding_stack_start, binding_stack_size);
+ }
verify_space((lispobj*)READ_ONLY_SPACE_START, read_only_space_size);
verify_space((lispobj*)STATIC_SPACE_START , static_space_size);
- verify_space((lispobj*)BINDING_STACK_START , binding_stack_size);
}
static void
int i;
for (i = 0; i < last_free_page; i++) {
- if ((page_table[i].allocated != FREE_PAGE)
+ if ((page_table[i].allocated != FREE_PAGE_FLAG)
&& (page_table[i].bytes_used != 0)
&& (page_table[i].gen == generation)) {
- int last_page;
+ long last_page;
int region_allocation = page_table[i].allocated;
/* This should be the start of a contiguous block */
for (last_page = i; ;last_page++)
/* Check whether this is the last page in this contiguous
* block. */
- if ((page_table[last_page].bytes_used < 4096)
- /* Or it is 4096 and is the last in the block */
+ if ((page_table[last_page].bytes_used < PAGE_BYTES)
+ /* Or it is PAGE_BYTES and is the last in the block */
|| (page_table[last_page+1].allocated != region_allocation)
|| (page_table[last_page+1].bytes_used == 0)
|| (page_table[last_page+1].gen != generation)
break;
verify_space(page_address(i), (page_table[last_page].bytes_used
- + (last_page-i)*4096)/4);
+ + (last_page-i)*PAGE_BYTES)/N_WORD_BYTES);
i = last_page;
}
}
static void
verify_zero_fill(void)
{
- int page;
+ long page;
for (page = 0; page < last_free_page; page++) {
- if (page_table[page].allocated == FREE_PAGE) {
+ if (page_table[page].allocated == FREE_PAGE_FLAG) {
/* The whole page should be zero filled. */
- int *start_addr = (int *)page_address(page);
- int size = 1024;
- int i;
+ long *start_addr = (long *)page_address(page);
+ long size = 1024;
+ long i;
for (i = 0; i < size; i++) {
if (start_addr[i] != 0) {
lose("free page not zero at %x", start_addr + i);
}
}
} else {
- int free_bytes = 4096 - page_table[page].bytes_used;
+ long free_bytes = PAGE_BYTES - page_table[page].bytes_used;
if (free_bytes > 0) {
- int *start_addr = (int *)((unsigned)page_address(page)
+ long *start_addr = (long *)((unsigned)page_address(page)
+ page_table[page].bytes_used);
- int size = free_bytes / 4;
- int i;
+ long size = free_bytes / N_WORD_BYTES;
+ long i;
for (i = 0; i < size; i++) {
if (start_addr[i] != 0) {
lose("free region not zero at %x", start_addr + i);
gencgc_verify_zero_fill(void)
{
/* Flush the alloc regions updating the tables. */
- boxed_region.free_pointer = current_region_free_pointer;
- gc_alloc_update_page_tables(0, &boxed_region);
- gc_alloc_update_page_tables(1, &unboxed_region);
+ gc_alloc_update_all_page_tables();
SHOW("verifying zero fill");
verify_zero_fill();
- current_region_free_pointer = boxed_region.free_pointer;
- current_region_end_addr = boxed_region.end_addr;
}
static void
verify_dynamic_space(void)
{
- int i;
+ long i;
for (i = 0; i < NUM_GENERATIONS; i++)
verify_generation(i);
static void
write_protect_generation_pages(int generation)
{
- int i;
+ long i;
gc_assert(generation < NUM_GENERATIONS);
for (i = 0; i < last_free_page; i++)
- if ((page_table[i].allocated == BOXED_PAGE)
+ if ((page_table[i].allocated == BOXED_PAGE_FLAG)
&& (page_table[i].bytes_used != 0)
+ && !page_table[i].dont_move
&& (page_table[i].gen == generation)) {
void *page_start;
page_start = (void *)page_address(i);
os_protect(page_start,
- 4096,
+ PAGE_BYTES,
OS_VM_PROT_READ | OS_VM_PROT_EXECUTE);
/* Note the page as protected in the page tables. */
{
unsigned long bytes_freed;
unsigned long i;
- unsigned long read_only_space_size, static_space_size;
-
+ unsigned long static_space_size;
+ struct thread *th;
gc_assert(generation <= (NUM_GENERATIONS-1));
/* The oldest generation can't be raised. */
* temporary generation (NUM_GENERATIONS), and lowered when
* done. Set up this new generation. There should be no pages
* allocated to it yet. */
- if (!raise)
- gc_assert(generations[NUM_GENERATIONS].bytes_allocated == 0);
+ if (!raise) {
+ gc_assert(generations[NUM_GENERATIONS].bytes_allocated == 0);
+ }
/* Set the global src and dest. generations */
from_space = generation;
/* Before any pointers are preserved, the dont_move flags on the
* pages need to be cleared. */
for (i = 0; i < last_free_page; i++)
- page_table[i].dont_move = 0;
+ if(page_table[i].gen==from_space)
+ page_table[i].dont_move = 0;
/* Un-write-protect the old-space pages. This is essential for the
* promoted pages as they may contain pointers into the old-space
* be un-protected anyway before unmapping later. */
unprotect_oldspace();
- /* Scavenge the stack's conservative roots. */
- {
+ /* Scavenge the stacks' conservative roots. */
+
+ /* there are potentially two stacks for each thread: the main
+ * stack, which may contain Lisp pointers, and the alternate stack.
+ * We don't ever run Lisp code on the altstack, but it may
+ * host a sigcontext with lisp objects in it */
+
+ /* what we need to do: (1) find the stack pointer for the main
+ * stack; scavenge it (2) find the interrupt context on the
+ * alternate stack that might contain lisp values, and scavenge
+ * that */
+
+ /* we assume that none of the preceding applies to the thread that
+ * initiates GC. If you ever call GC from inside an altstack
+ * handler, you will lose. */
+ for_each_thread(th) {
void **ptr;
- for (ptr = (void **)CONTROL_STACK_END - 1;
- ptr > (void **)&raise;
- ptr--) {
+ void **esp=(void **)-1;
+#ifdef LISP_FEATURE_SB_THREAD
+ long i,free;
+ if(th==arch_os_get_current_thread()) {
+ esp = (void **) &raise;
+ } else {
+ void **esp1;
+ free=fixnum_value(SymbolValue(FREE_INTERRUPT_CONTEXT_INDEX,th));
+ for(i=free-1;i>=0;i--) {
+ os_context_t *c=th->interrupt_contexts[i];
+ esp1 = (void **) *os_context_register_addr(c,reg_SP);
+ if(esp1>=th->control_stack_start&& esp1<th->control_stack_end){
+ if(esp1<esp) esp=esp1;
+ for(ptr = (void **)(c+1); ptr>=(void **)c; ptr--) {
+ preserve_pointer(*ptr);
+ }
+ }
+ }
+ }
+#else
+ esp = (void **) &raise;
+#endif
+ for (ptr = (void **)th->control_stack_end; ptr > esp; ptr--) {
preserve_pointer(*ptr);
}
}
-#if QSHOW
+#ifdef QSHOW
if (gencgc_verbose > 1) {
- int num_dont_move_pages = count_dont_move_pages();
+ long num_dont_move_pages = count_dont_move_pages();
fprintf(stderr,
"/non-movable pages due to conservative pointers = %d (%d bytes)\n",
num_dont_move_pages,
- /* FIXME: 4096 should be symbolic constant here and
- * prob'ly elsewhere too. */
- num_dont_move_pages * 4096);
+ num_dont_move_pages * PAGE_BYTES);
}
#endif
/* Scavenge the Lisp functions of the interrupt handlers, taking
* care to avoid SIG_DFL and SIG_IGN. */
+ for_each_thread(th) {
+ struct interrupt_data *data=th->interrupt_data;
for (i = 0; i < NSIG; i++) {
- union interrupt_handler handler = interrupt_handlers[i];
+ union interrupt_handler handler = data->interrupt_handlers[i];
if (!ARE_SAME_HANDLER(handler.c, SIG_IGN) &&
!ARE_SAME_HANDLER(handler.c, SIG_DFL)) {
- scavenge((lispobj *)(interrupt_handlers + i), 1);
+ scavenge((lispobj *)(data->interrupt_handlers + i), 1);
+ }
+ }
+ }
+ /* Scavenge the binding stacks. */
+ {
+ struct thread *th;
+ for_each_thread(th) {
+ long len= (lispobj *)SymbolValue(BINDING_STACK_POINTER,th) -
+ th->binding_stack_start;
+ scavenge((lispobj *) th->binding_stack_start,len);
+#ifdef LISP_FEATURE_SB_THREAD
+ /* do the tls as well */
+ len=fixnum_value(SymbolValue(FREE_TLS_INDEX,0)) -
+ (sizeof (struct thread))/(sizeof (lispobj));
+ scavenge((lispobj *) (th+1),len);
+#endif
}
}
-
- /* Scavenge the binding stack. */
- scavenge((lispobj *) BINDING_STACK_START,
- (lispobj *)SymbolValue(BINDING_STACK_POINTER) -
- (lispobj *)BINDING_STACK_START);
/* The original CMU CL code had scavenge-read-only-space code
* controlled by the Lisp-level variable
* please submit a patch. */
#if 0
if (SymbolValue(SCAVENGE_READ_ONLY_SPACE) != NIL) {
- read_only_space_size =
+ unsigned long read_only_space_size =
(lispobj*)SymbolValue(READ_ONLY_SPACE_FREE_POINTER) -
(lispobj*)READ_ONLY_SPACE_START;
FSHOW((stderr,
/* Scavenge static space. */
static_space_size =
- (lispobj *)SymbolValue(STATIC_SPACE_FREE_POINTER) -
+ (lispobj *)SymbolValue(STATIC_SPACE_FREE_POINTER,0) -
(lispobj *)STATIC_SPACE_START;
if (gencgc_verbose > 1) {
FSHOW((stderr,
/* As a check re-scavenge the newspace once; no new objects should
* be found. */
{
- int old_bytes_allocated = bytes_allocated;
- int bytes_allocated;
+ long old_bytes_allocated = bytes_allocated;
+ long bytes_allocated;
/* Start with a full scavenge. */
scavenge_newspace_generation_one_scan(new_space);
/* Flush the current regions, updating the tables. */
- gc_alloc_update_page_tables(0, &boxed_region);
- gc_alloc_update_page_tables(1, &unboxed_region);
+ gc_alloc_update_all_page_tables();
bytes_allocated = bytes_allocated - old_bytes_allocated;
scan_weak_pointers();
/* Flush the current regions, updating the tables. */
- gc_alloc_update_page_tables(0, &boxed_region);
- gc_alloc_update_page_tables(1, &unboxed_region);
+ gc_alloc_update_all_page_tables();
/* Free the pages in oldspace, but not those marked dont_move. */
bytes_freed = free_oldspace();
}
/* Update last_free_page, then SymbolValue(ALLOCATION_POINTER). */
-int
+long
update_x86_dynamic_space_free_pointer(void)
{
- int last_page = -1;
- int i;
+ long last_page = -1;
+ long i;
- for (i = 0; i < NUM_PAGES; i++)
- if ((page_table[i].allocated != FREE_PAGE)
+ for (i = 0; i < last_free_page; i++)
+ if ((page_table[i].allocated != FREE_PAGE_FLAG)
&& (page_table[i].bytes_used != 0))
last_page = i;
last_free_page = last_page+1;
SetSymbolValue(ALLOCATION_POINTER,
- (lispobj)(((char *)heap_base) + last_free_page*4096));
+ (lispobj)(((char *)heap_base) + last_free_page*PAGE_BYTES),0);
return 0; /* dummy value: return something ... */
}
-/* GC all generations below last_gen, raising their objects to the
- * next generation until all generations below last_gen are empty.
- * Then if last_gen is due for a GC then GC it. In the special case
- * that last_gen==NUM_GENERATIONS, the last generation is always
- * GC'ed. The valid range for last_gen is: 0,1,...,NUM_GENERATIONS.
+/* GC all generations newer than last_gen, raising the objects in each
+ * to the next older generation - we finish when all generations below
+ * last_gen are empty. Then if last_gen is due for a GC, or if
+ * last_gen==NUM_GENERATIONS (the scratch generation? eh?) we GC that
+ * too. The valid range for last_gen is: 0,1,...,NUM_GENERATIONS.
*
- * The oldest generation to be GCed will always be
- * gencgc_oldest_gen_to_gc, partly ignoring last_gen if necessary. */
+ * We stop collecting at gencgc_oldest_gen_to_gc, even if this is less than
+ * last_gen (oh, and note that by default it is NUM_GENERATIONS-1) */
+
void
collect_garbage(unsigned last_gen)
{
int gen = 0;
int raise;
int gen_to_wp;
- int i;
-
- boxed_region.free_pointer = current_region_free_pointer;
+ long i;
FSHOW((stderr, "/entering collect_garbage(%d)\n", last_gen));
}
/* Flush the alloc regions updating the tables. */
- gc_alloc_update_page_tables(0, &boxed_region);
- gc_alloc_update_page_tables(1, &unboxed_region);
+ gc_alloc_update_all_page_tables();
/* Verify the new objects created by Lisp code. */
if (pre_verify_gen_0) {
- SHOW((stderr, "pre-checking generation 0\n"));
+ FSHOW((stderr, "pre-checking generation 0\n"));
verify_generation(0);
}
gc_alloc_generation = 0;
update_x86_dynamic_space_free_pointer();
-
- /* This is now done by Lisp SCRUB-CONTROL-STACK in Lisp SUB-GC, so
- * we needn't do it here: */
- /* zero_stack();*/
-
- current_region_free_pointer = boxed_region.free_pointer;
- current_region_end_addr = boxed_region.end_addr;
-
+ auto_gc_trigger = bytes_allocated + bytes_consed_between_gcs;
+ if(gencgc_verbose)
+ fprintf(stderr,"Next gc when %ld bytes have been consed\n",
+ auto_gc_trigger);
SHOW("returning from collect_garbage");
}
void
gc_free_heap(void)
{
- int page;
+ long page;
if (gencgc_verbose > 1)
SHOW("entering gc_free_heap");
for (page = 0; page < NUM_PAGES; page++) {
/* Skip free pages which should already be zero filled. */
- if (page_table[page].allocated != FREE_PAGE) {
+ if (page_table[page].allocated != FREE_PAGE_FLAG) {
void *page_start, *addr;
/* Mark the page free. The other slots are assumed invalid
- * when it is a FREE_PAGE and bytes_used is 0 and it
+ * when it is a FREE_PAGE_FLAG and bytes_used is 0 and it
* should not be write-protected -- except that the
* generation is used for the current region but it sets
* that up. */
- page_table[page].allocated = FREE_PAGE;
+ page_table[page].allocated = FREE_PAGE_FLAG;
page_table[page].bytes_used = 0;
/* Zero the page. */
page_start = (void *)page_address(page);
/* First, remove any write-protection. */
- os_protect(page_start, 4096, OS_VM_PROT_ALL);
+ os_protect(page_start, PAGE_BYTES, OS_VM_PROT_ALL);
page_table[page].write_protected = 0;
- os_invalidate(page_start,4096);
- addr = os_validate(page_start,4096);
+ os_invalidate(page_start,PAGE_BYTES);
+ addr = os_validate(page_start,PAGE_BYTES);
if (addr == NULL || addr != page_start) {
lose("gc_free_heap: page moved, 0x%08x ==> 0x%08x",
page_start,
}
} else if (gencgc_zero_check_during_free_heap) {
/* Double-check that the page is zero filled. */
- int *page_start, i;
- gc_assert(page_table[page].allocated == FREE_PAGE);
+ long *page_start, i;
+ gc_assert(page_table[page].allocated == FREE_PAGE_FLAG);
gc_assert(page_table[page].bytes_used == 0);
- page_start = (int *)page_address(page);
+ page_start = (long *)page_address(page);
for (i=0; i<1024; i++) {
if (page_start[i] != 0) {
lose("free region not zero at %x", page_start + i);
/* Initialize gc_alloc(). */
gc_alloc_generation = 0;
- boxed_region.first_page = 0;
- boxed_region.last_page = -1;
- boxed_region.start_addr = page_address(0);
- boxed_region.free_pointer = page_address(0);
- boxed_region.end_addr = page_address(0);
- unboxed_region.first_page = 0;
- unboxed_region.last_page = -1;
- unboxed_region.start_addr = page_address(0);
- unboxed_region.free_pointer = page_address(0);
- unboxed_region.end_addr = page_address(0);
-
-#if 0 /* Lisp PURIFY is currently running on the C stack so don't do this. */
- zero_stack();
-#endif
- last_free_page = 0;
- SetSymbolValue(ALLOCATION_POINTER, (lispobj)((char *)heap_base));
+ gc_set_region_empty(&boxed_region);
+ gc_set_region_empty(&unboxed_region);
- current_region_free_pointer = boxed_region.free_pointer;
- current_region_end_addr = boxed_region.end_addr;
+ last_free_page = 0;
+ SetSymbolValue(ALLOCATION_POINTER, (lispobj)((char *)heap_base),0);
if (verify_after_free_heap) {
/* Check whether purify has left any bad pointers. */
void
gc_init(void)
{
- int i;
+ long i;
gc_init_tables();
+ scavtab[SIMPLE_VECTOR_WIDETAG] = scav_vector;
+ scavtab[WEAK_POINTER_WIDETAG] = scav_weak_pointer;
+ transother[SIMPLE_ARRAY_WIDETAG] = trans_boxed_large;
heap_base = (void*)DYNAMIC_SPACE_START;
/* Initialize each page structure. */
for (i = 0; i < NUM_PAGES; i++) {
/* Initialize all pages as free. */
- page_table[i].allocated = FREE_PAGE;
+ page_table[i].allocated = FREE_PAGE_FLAG;
page_table[i].bytes_used = 0;
/* Pages are not write-protected at startup. */
generations[i].min_av_mem_age = 0.75;
}
- /* Initialize gc_alloc.
- *
- * FIXME: identical with code in gc_free_heap(), should be shared */
+ /* Initialize gc_alloc. */
gc_alloc_generation = 0;
- boxed_region.first_page = 0;
- boxed_region.last_page = -1;
- boxed_region.start_addr = page_address(0);
- boxed_region.free_pointer = page_address(0);
- boxed_region.end_addr = page_address(0);
- unboxed_region.first_page = 0;
- unboxed_region.last_page = -1;
- unboxed_region.start_addr = page_address(0);
- unboxed_region.free_pointer = page_address(0);
- unboxed_region.end_addr = page_address(0);
+ gc_set_region_empty(&boxed_region);
+ gc_set_region_empty(&unboxed_region);
last_free_page = 0;
- current_region_free_pointer = boxed_region.free_pointer;
- current_region_end_addr = boxed_region.end_addr;
}
/* Pick up the dynamic space from after a core load.
*
* The ALLOCATION_POINTER points to the end of the dynamic space.
- *
- * XX A scan is needed to identify the closest first objects for pages. */
-void
+ */
+
+static void
gencgc_pickup_dynamic(void)
{
- int page = 0;
- int addr = DYNAMIC_SPACE_START;
- int alloc_ptr = SymbolValue(ALLOCATION_POINTER);
+ long page = 0;
+ long alloc_ptr = SymbolValue(ALLOCATION_POINTER,0);
+ lispobj *prev=(lispobj *)page_address(page);
- /* Initialize the first region. */
do {
- page_table[page].allocated = BOXED_PAGE;
+ lispobj *first,*ptr= (lispobj *)page_address(page);
+ page_table[page].allocated = BOXED_PAGE_FLAG;
page_table[page].gen = 0;
- page_table[page].bytes_used = 4096;
+ page_table[page].bytes_used = PAGE_BYTES;
page_table[page].large_object = 0;
+
+ first=gc_search_space(prev,(ptr+2)-prev,ptr);
+ if(ptr == first) prev=ptr;
page_table[page].first_object_offset =
- (void *)DYNAMIC_SPACE_START - page_address(page);
- addr += 4096;
+ (void *)prev - page_address(page);
page++;
- } while (addr < alloc_ptr);
+ } while (page_address(page) < alloc_ptr);
+
+ generations[0].bytes_allocated = PAGE_BYTES*page;
+ bytes_allocated = PAGE_BYTES*page;
+
+}
- generations[0].bytes_allocated = 4096*page;
- bytes_allocated = 4096*page;
- current_region_free_pointer = boxed_region.free_pointer;
- current_region_end_addr = boxed_region.end_addr;
+void
+gc_initialize_pointers(void)
+{
+ gencgc_pickup_dynamic();
}
+
+
\f
-/* a counter for how deep we are in alloc(..) calls */
-int alloc_entered = 0;
/* alloc(..) is the external interface for memory allocation. It
* allocates to generation 0. It is not called from within the garbage
* (E.g. the most significant word of a 2-word bignum in MOVE-FROM-UNSIGNED.)
*
* The check for a GC trigger is only performed when the current
- * region is full, so in most cases it's not needed. Further MAYBE-GC
- * is only called once because Lisp will remember "need to collect
- * garbage" and get around to it when it can. */
+ * region is full, so in most cases it's not needed. */
+
char *
-alloc(int nbytes)
+alloc(long nbytes)
{
+ struct thread *th=arch_os_get_current_thread();
+ struct alloc_region *region=
+#ifdef LISP_FEATURE_SB_THREAD
+ th ? &(th->alloc_region) : &boxed_region;
+#else
+ &boxed_region;
+#endif
+ void *new_obj;
+ void *new_free_pointer;
+ gc_assert(nbytes>0);
/* Check for alignment allocation problems. */
- gc_assert((((unsigned)current_region_free_pointer & 0x7) == 0)
- && ((nbytes & 0x7) == 0));
-
- if (SymbolValue(PSEUDO_ATOMIC_ATOMIC)) {/* if already in a pseudo atomic */
-
- void *new_free_pointer;
-
- retry1:
- if (alloc_entered) {
- SHOW("alloc re-entered in already-pseudo-atomic case");
- }
- ++alloc_entered;
-
- /* Check whether there is room in the current region. */
- new_free_pointer = current_region_free_pointer + nbytes;
-
- /* FIXME: Shouldn't we be doing some sort of lock here, to
- * keep from getting screwed if an interrupt service routine
- * allocates memory between the time we calculate new_free_pointer
- * and the time we write it back to current_region_free_pointer?
- * Perhaps I just don't understand pseudo-atomics..
- *
- * Perhaps I don't. It looks as though what happens is if we
- * were interrupted any time during the pseudo-atomic
- * interval (which includes now) we discard the allocated
- * memory and try again. So, at least we don't return
- * a memory area that was allocated out from underneath us
- * by code in an ISR.
- * Still, that doesn't seem to prevent
- * current_region_free_pointer from getting corrupted:
- * We read current_region_free_pointer.
- * They read current_region_free_pointer.
- * They write current_region_free_pointer.
- * We write current_region_free_pointer, scribbling over
- * whatever they wrote. */
-
- if (new_free_pointer <= boxed_region.end_addr) {
- /* If so then allocate from the current region. */
- void *new_obj = current_region_free_pointer;
- current_region_free_pointer = new_free_pointer;
- alloc_entered--;
- return((void *)new_obj);
- }
-
- if (auto_gc_trigger && bytes_allocated > auto_gc_trigger) {
- /* Double the trigger. */
- auto_gc_trigger *= 2;
- alloc_entered--;
- /* Exit the pseudo-atomic. */
- SetSymbolValue(PSEUDO_ATOMIC_ATOMIC, make_fixnum(0));
- if (SymbolValue(PSEUDO_ATOMIC_INTERRUPTED) != 0) {
- /* Handle any interrupts that occurred during
- * gc_alloc(..). */
- do_pending_interrupt();
- }
- funcall0(SymbolFunction(MAYBE_GC));
- /* Re-enter the pseudo-atomic. */
- SetSymbolValue(PSEUDO_ATOMIC_INTERRUPTED, make_fixnum(0));
- SetSymbolValue(PSEUDO_ATOMIC_ATOMIC, make_fixnum(1));
- goto retry1;
- }
- /* Call gc_alloc(). */
- boxed_region.free_pointer = current_region_free_pointer;
- {
- void *new_obj = gc_alloc(nbytes);
- current_region_free_pointer = boxed_region.free_pointer;
- current_region_end_addr = boxed_region.end_addr;
- alloc_entered--;
- return (new_obj);
- }
- } else {
- void *result;
- void *new_free_pointer;
-
- retry2:
- /* At least wrap this allocation in a pseudo atomic to prevent
- * gc_alloc() from being re-entered. */
- SetSymbolValue(PSEUDO_ATOMIC_INTERRUPTED, make_fixnum(0));
- SetSymbolValue(PSEUDO_ATOMIC_ATOMIC, make_fixnum(1));
-
- if (alloc_entered)
- SHOW("alloc re-entered in not-already-pseudo-atomic case");
- ++alloc_entered;
-
- /* Check whether there is room in the current region. */
- new_free_pointer = current_region_free_pointer + nbytes;
-
- if (new_free_pointer <= boxed_region.end_addr) {
- /* If so then allocate from the current region. */
- void *new_obj = current_region_free_pointer;
- current_region_free_pointer = new_free_pointer;
- alloc_entered--;
- SetSymbolValue(PSEUDO_ATOMIC_ATOMIC, make_fixnum(0));
- if (SymbolValue(PSEUDO_ATOMIC_INTERRUPTED)) {
- /* Handle any interrupts that occurred during
- * gc_alloc(..). */
- do_pending_interrupt();
- goto retry2;
- }
-
- return((void *)new_obj);
- }
-
- /* KLUDGE: There's lots of code around here shared with the
- * the other branch. Is there some way to factor out the
- * duplicate code? -- WHN 19991129 */
- if (auto_gc_trigger && bytes_allocated > auto_gc_trigger) {
- /* Double the trigger. */
- auto_gc_trigger *= 2;
- alloc_entered--;
- /* Exit the pseudo atomic. */
- SetSymbolValue(PSEUDO_ATOMIC_ATOMIC, make_fixnum(0));
- if (SymbolValue(PSEUDO_ATOMIC_INTERRUPTED) != 0) {
- /* Handle any interrupts that occurred during
- * gc_alloc(..); */
- do_pending_interrupt();
- }
- funcall0(SymbolFunction(MAYBE_GC));
- goto retry2;
- }
-
- /* Else call gc_alloc(). */
- boxed_region.free_pointer = current_region_free_pointer;
- result = gc_alloc(nbytes);
- current_region_free_pointer = boxed_region.free_pointer;
- current_region_end_addr = boxed_region.end_addr;
-
- alloc_entered--;
- SetSymbolValue(PSEUDO_ATOMIC_ATOMIC, make_fixnum(0));
- if (SymbolValue(PSEUDO_ATOMIC_INTERRUPTED) != 0) {
- /* Handle any interrupts that occurred during gc_alloc(..). */
- do_pending_interrupt();
- goto retry2;
+ gc_assert((((unsigned)region->free_pointer & LOWTAG_MASK) == 0)
+ && ((nbytes & LOWTAG_MASK) == 0));
+#if 0
+ if(all_threads)
+ /* there are a few places in the C code that allocate data in the
+ * heap before Lisp starts. This is before interrupts are enabled,
+ * so we don't need to check for pseudo-atomic */
+#ifdef LISP_FEATURE_SB_THREAD
+ if(!SymbolValue(PSEUDO_ATOMIC_ATOMIC,th)) {
+ register u32 fs;
+ fprintf(stderr, "fatal error in thread 0x%x, tid=%ld\n",
+ th,th->os_thread);
+ __asm__("movl %fs,%0" : "=r" (fs) : );
+ fprintf(stderr, "fs is %x, th->tls_cookie=%x \n",
+ debug_get_fs(),th->tls_cookie);
+ lose("If you see this message before 2004.01.31, mail details to sbcl-devel\n");
}
-
- return result;
+#else
+ gc_assert(SymbolValue(PSEUDO_ATOMIC_ATOMIC,th));
+#endif
+#endif
+
+ /* maybe we can do this quickly ... */
+ new_free_pointer = region->free_pointer + nbytes;
+ if (new_free_pointer <= region->end_addr) {
+ new_obj = (void*)(region->free_pointer);
+ region->free_pointer = new_free_pointer;
+ return(new_obj); /* yup */
}
-}
-\f
-/*
- * noise to manipulate the gc trigger stuff
- */
-
-void
-set_auto_gc_trigger(os_vm_size_t dynamic_usage)
-{
- auto_gc_trigger += dynamic_usage;
-}
-
-void
-clear_auto_gc_trigger(void)
-{
- auto_gc_trigger = 0;
-}
-\f
-/* Find the code object for the given pc, or return NULL on failure.
- *
- * FIXME: PC shouldn't be lispobj*, should it? Maybe void*? */
-lispobj *
-component_ptr_from_pc(lispobj *pc)
-{
- lispobj *object = NULL;
-
- if ( (object = search_read_only_space(pc)) )
- ;
- else if ( (object = search_static_space(pc)) )
- ;
- else
- object = search_dynamic_space(pc);
-
- if (object) /* if we found something */
- if (TypeOf(*object) == type_CodeHeader) /* if it's a code object */
- return(object);
-
- return (NULL);
+
+ /* we have to go the long way around, it seems. Check whether
+ * we should GC in the near future
+ */
+ if (auto_gc_trigger && bytes_allocated > auto_gc_trigger) {
+ struct thread *thread=arch_os_get_current_thread();
+ /* Don't flood the system with interrupts if the need to gc is
+ * already noted. This can happen for example when SUB-GC
+ * allocates or after a gc triggered in a WITHOUT-GCING. */
+ if (SymbolValue(NEED_TO_COLLECT_GARBAGE,thread) == NIL) {
+ /* set things up so that GC happens when we finish the PA
+ * section. We only do this if there wasn't a pending
+ * handler already, in case it was a gc. If it wasn't a
+ * GC, the next allocation will get us back to this point
+ * anyway, so no harm done
+ */
+ struct interrupt_data *data=th->interrupt_data;
+ sigset_t new_mask,old_mask;
+ sigemptyset(&new_mask);
+ sigaddset_blockable(&new_mask);
+ thread_sigmask(SIG_BLOCK,&new_mask,&old_mask);
+
+ if((!data->pending_handler) &&
+ maybe_defer_handler(interrupt_maybe_gc_int,data,0,0,0)) {
+ /* Leave the signals blocked just as if it was
+ * deferred the normal way and set the
+ * pending_mask. */
+ sigcopyset(&(data->pending_mask),&old_mask);
+ SetSymbolValue(NEED_TO_COLLECT_GARBAGE,T,thread);
+ } else {
+ thread_sigmask(SIG_SETMASK,&old_mask,0);
+ }
+ }
+ }
+ new_obj = gc_alloc_with_region(nbytes,0,region,0);
+ return (new_obj);
}
\f
/*
* Return true if this signal is a normal generational GC thing that
* we were able to handle, or false if it was abnormal and control
* should fall through to the general SIGSEGV/SIGBUS/whatever logic. */
+
int
gencgc_handle_wp_violation(void* fault_addr)
{
- int page_index = find_page_index(fault_addr);
+ long page_index = find_page_index(fault_addr);
-#if defined QSHOW_SIGNALS
+#ifdef QSHOW_SIGNALS
FSHOW((stderr, "heap WP violation? fault_addr=%x, page_index=%d\n",
fault_addr, page_index));
#endif
return 0;
} else {
-
- /* The only acceptable reason for an signal like this from the
- * heap is that the generational GC write-protected the page. */
- if (page_table[page_index].write_protected != 1) {
- lose("access failure in heap page not marked as write-protected");
+ if (page_table[page_index].write_protected) {
+ /* Unprotect the page. */
+ os_protect(page_address(page_index), PAGE_BYTES, OS_VM_PROT_ALL);
+ page_table[page_index].write_protected_cleared = 1;
+ page_table[page_index].write_protected = 0;
+ } else {
+ /* The only acceptable reason for this signal on a heap
+ * access is that GENCGC write-protected the page.
+ * However, if two CPUs hit a wp page near-simultaneously,
+ * we had better not have the second one lose here if it
+ * does this test after the first one has already set wp=0
+ */
+ if(page_table[page_index].write_protected_cleared != 1)
+ lose("fault in heap page not marked as write-protected");
}
-
- /* Unprotect the page. */
- os_protect(page_address(page_index), 4096, OS_VM_PROT_ALL);
- page_table[page_index].write_protected = 0;
- page_table[page_index].write_protected_cleared = 1;
-
/* Don't worry, we can handle it. */
return 1;
}
}
-
/* This is to be called when we catch a SIGSEGV/SIGBUS, determine that
* it's not just a case of the program hitting the write barrier, and
* are about to let Lisp deal with it. It's basically just a
void
unhandled_sigmemoryfault()
{}
+
+void gc_alloc_update_all_page_tables(void)
+{
+ /* Flush the alloc regions updating the tables. */
+ struct thread *th;
+ for_each_thread(th)
+ gc_alloc_update_page_tables(0, &th->alloc_region);
+ gc_alloc_update_page_tables(1, &unboxed_region);
+ gc_alloc_update_page_tables(0, &boxed_region);
+}
+void
+gc_set_region_empty(struct alloc_region *region)
+{
+ region->first_page = 0;
+ region->last_page = -1;
+ region->start_addr = page_address(0);
+ region->free_pointer = page_address(0);
+ region->end_addr = page_address(0);
+}
+
projects / sbcl.git / blobdiff