#include <stdlib.h>
#include <stdio.h>
-#include <signal.h>
#include <errno.h>
#include <string.h>
#include "sbcl.h"
+#if defined(LISP_FEATURE_WIN32) && defined(LISP_FEATURE_SB_THREAD)
+#include "pthreads_win32.h"
+#else
+#include <signal.h>
+#endif
#include "runtime.h"
#include "os.h"
#include "interr.h"
#include "gc.h"
#include "gc-internal.h"
#include "thread.h"
+#include "pseudo-atomic.h"
#include "alloc.h"
#include "genesis/vector.h"
#include "genesis/weak-pointer.h"
#include "genesis/instance.h"
#include "genesis/layout.h"
#include "gencgc.h"
-#if defined(LUTEX_WIDETAG)
-#include "pthread-lutex.h"
+#if !defined(LISP_FEATURE_X86) && !defined(LISP_FEATURE_X86_64)
+#include "genesis/cons.h"
#endif
/* forward declarations */
-page_index_t gc_find_freeish_pages(long *restart_page_ptr, long nbytes,
+page_index_t gc_find_freeish_pages(page_index_t *restart_page_ptr, sword_t nbytes,
int page_type_flag);
\f
* scratch space by the collector, and should never get collected.
*/
enum {
- HIGHEST_NORMAL_GENERATION = 5,
- PSEUDO_STATIC_GENERATION,
- SCRATCH_GENERATION,
+ SCRATCH_GENERATION = PSEUDO_STATIC_GENERATION+1,
NUM_GENERATIONS
};
boolean enable_page_protection = 1;
/* the minimum size (in bytes) for a large object*/
-long large_object_size = 4 * PAGE_BYTES;
+#if (GENCGC_ALLOC_GRANULARITY >= PAGE_BYTES) && (GENCGC_ALLOC_GRANULARITY >= GENCGC_CARD_BYTES)
+os_vm_size_t large_object_size = 4 * GENCGC_ALLOC_GRANULARITY;
+#elif (GENCGC_CARD_BYTES >= PAGE_BYTES) && (GENCGC_CARD_BYTES >= GENCGC_ALLOC_GRANULARITY)
+os_vm_size_t large_object_size = 4 * GENCGC_CARD_BYTES;
+#else
+os_vm_size_t large_object_size = 4 * PAGE_BYTES;
+#endif
+
+/* Largest allocation seen since last GC. */
+os_vm_size_t large_allocation = 0;
\f
/*
/* the verbosity level. All non-error messages are disabled at level 0;
* and only a few rare messages are printed at level 1. */
-#ifdef QSHOW
+#if QSHOW == 2
boolean gencgc_verbose = 1;
#else
boolean gencgc_verbose = 0;
* during a heap verify? */
boolean verify_dynamic_code_check = 0;
+#ifdef LISP_FEATURE_X86
/* Should we check code objects for fixup errors after they are transported? */
boolean check_code_fixups = 0;
+#endif
/* Should we check that newly allocated regions are zero filled? */
boolean gencgc_zero_check = 0;
*/
/* the total bytes allocated. These are seen by Lisp DYNAMIC-USAGE. */
-unsigned long bytes_allocated = 0;
-unsigned long auto_gc_trigger = 0;
+os_vm_size_t bytes_allocated = 0;
+os_vm_size_t auto_gc_trigger = 0;
/* the source and destination generations. These are set before a GC starts
* scavenging. */
static boolean conservative_stack = 1;
/* An array of page structures is allocated on gc initialization.
- * This helps quickly map between an address its page structure.
+ * This helps to quickly map between an address and its page structure.
* page_table_pages is set from the size of the dynamic space. */
page_index_t page_table_pages;
struct page *page_table;
/* To map addresses to page structures the address of the first page
* is needed. */
-static void *heap_base = NULL;
+void *heap_base = NULL;
/* Calculate the start address for the given page number. */
inline void *
page_address(page_index_t page_num)
{
- return (heap_base + (page_num * PAGE_BYTES));
+ return (heap_base + (page_num * GENCGC_CARD_BYTES));
}
/* Calculate the address where the allocation region associated with
* the page starts. */
static inline void *
-page_region_start(page_index_t page_index)
+page_scan_start(page_index_t page_index)
+{
+ return page_address(page_index)-page_table[page_index].scan_start_offset;
+}
+
+/* True if the page starts a contiguous block. */
+static inline boolean
+page_starts_contiguous_block_p(page_index_t page_index)
+{
+ return page_table[page_index].scan_start_offset == 0;
+}
+
+/* True if the page is the last page in a contiguous block. */
+static inline boolean
+page_ends_contiguous_block_p(page_index_t page_index, generation_index_t gen)
{
- return page_address(page_index)-page_table[page_index].region_start_offset;
+ return (/* page doesn't fill block */
+ (page_table[page_index].bytes_used < GENCGC_CARD_BYTES)
+ /* page is last allocated page */
+ || ((page_index + 1) >= last_free_page)
+ /* next page free */
+ || page_free_p(page_index + 1)
+ /* next page contains no data */
+ || (page_table[page_index + 1].bytes_used == 0)
+ /* next page is in different generation */
+ || (page_table[page_index + 1].gen != gen)
+ /* next page starts its own contiguous block */
+ || (page_starts_contiguous_block_p(page_index + 1)));
}
/* Find the page index within the page_table for the given
{
if (addr >= heap_base) {
page_index_t index = ((pointer_sized_uint_t)addr -
- (pointer_sized_uint_t)heap_base) / PAGE_BYTES;
+ (pointer_sized_uint_t)heap_base) / GENCGC_CARD_BYTES;
if (index < page_table_pages)
return (index);
}
return (-1);
}
-static size_t
-npage_bytes(long npages)
+static os_vm_size_t
+npage_bytes(page_index_t npages)
{
gc_assert(npages>=0);
- return ((unsigned long)npages)*PAGE_BYTES;
+ return ((os_vm_size_t)npages)*GENCGC_CARD_BYTES;
}
/* Check that X is a higher address than Y and return offset from Y to
* X in bytes. */
-static inline
-size_t void_diff(void *x, void *y)
+static inline os_vm_size_t
+void_diff(void *x, void *y)
{
gc_assert(x >= y);
return (pointer_sized_uint_t)x - (pointer_sized_uint_t)y;
}
-/* a structure to hold the state of a generation */
+/* a structure to hold the state of a generation
+ *
+ * CAUTION: If you modify this, make sure to touch up the alien
+ * definition in src/code/gc.lisp accordingly. ...or better yes,
+ * deal with the FIXME there...
+ */
struct generation {
/* the first page that gc_alloc() checks on its next call */
page_index_t alloc_large_unboxed_start_page;
/* the bytes allocated to this generation */
- unsigned long bytes_allocated;
+ os_vm_size_t bytes_allocated;
/* the number of bytes at which to trigger a GC */
- unsigned long gc_trigger;
+ os_vm_size_t gc_trigger;
/* to calculate a new level for gc_trigger */
- unsigned long bytes_consed_between_gc;
+ os_vm_size_t bytes_consed_between_gc;
/* the number of GCs since the last raise */
int num_gc;
- /* the average age after which a GC will raise objects to the
+ /* the number of GCs to run on the generations before raising objects to the
* next generation */
- int trigger_age;
+ int number_of_gcs_before_promotion;
/* the cumulative sum of the bytes allocated to this generation. It is
* cleared after a GC on this generations, and update before new
* 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. */
- unsigned long cum_sum_bytes_allocated;
+ os_vm_size_t 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;
-
- /* A linked list of lutex structures in this generation, used for
- * implementing lutex finalization. */
-#ifdef LUTEX_WIDETAG
- struct lutex *lutexes;
-#else
- void *lutexes;
-#endif
+ double minimum_age_before_gc;
};
/* an array of generation structures. There needs to be one more
static pthread_mutex_t allocation_lock = PTHREAD_MUTEX_INITIALIZER;
#endif
+extern os_vm_size_t gencgc_release_granularity;
+os_vm_size_t gencgc_release_granularity = GENCGC_RELEASE_GRANULARITY;
+
+extern os_vm_size_t gencgc_alloc_granularity;
+os_vm_size_t gencgc_alloc_granularity = GENCGC_ALLOC_GRANULARITY;
+
\f
/*
* miscellaneous heap functions
/* Count the number of pages which are write-protected within the
* given generation. */
-static long
+static page_index_t
count_write_protect_generation_pages(generation_index_t generation)
{
- page_index_t i;
- unsigned long count = 0;
+ page_index_t i, count = 0;
for (i = 0; i < last_free_page; i++)
if (page_allocated_p(i)
}
/* Count the number of pages within the given generation. */
-static long
+static page_index_t
count_generation_pages(generation_index_t generation)
{
page_index_t i;
- long count = 0;
+ page_index_t count = 0;
for (i = 0; i < last_free_page; i++)
if (page_allocated_p(i)
return count;
}
-#ifdef QSHOW
-static long
+#if QSHOW
+static page_index_t
count_dont_move_pages(void)
{
page_index_t i;
- long count = 0;
+ page_index_t count = 0;
for (i = 0; i < last_free_page; i++) {
if (page_allocated_p(i)
&& (page_table[i].dont_move != 0)) {
/* Work through the pages and add up the number of bytes used for the
* given generation. */
-static unsigned long
+static os_vm_size_t
count_generation_bytes_allocated (generation_index_t gen)
{
page_index_t i;
- unsigned long result = 0;
+ os_vm_size_t result = 0;
for (i = 0; i < last_free_page; i++) {
if (page_allocated_p(i)
&& (page_table[i].gen == gen))
}
/* Return the average age of the memory in a generation. */
-static double
-gen_av_mem_age(generation_index_t gen)
+extern double
+generation_average_age(generation_index_t gen)
{
if (generations[gen].bytes_allocated == 0)
return 0.0;
/ ((double)generations[gen].bytes_allocated);
}
-/* The verbose argument controls how much to print: 0 for normal
- * level of detail; 1 for debugging. */
-static void
-print_generation_stats(int verbose) /* FIXME: should take FILE argument */
+extern void
+write_generation_stats(FILE *file)
{
- generation_index_t i, gens;
+ generation_index_t i;
#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
#define FPU_STATE_SIZE 27
#elif defined(LISP_FEATURE_PPC)
#define FPU_STATE_SIZE 32
long long fpu_state[FPU_STATE_SIZE];
+#elif defined(LISP_FEATURE_SPARC)
+ /*
+ * 32 (single-precision) FP registers, and the FP state register.
+ * But Sparc V9 has 32 double-precision registers (equivalent to 64
+ * single-precision, but can't be accessed), so we leave enough room
+ * for that.
+ */
+#define FPU_STATE_SIZE (((32 + 32 + 1) + 1)/2)
+ long long fpu_state[FPU_STATE_SIZE];
#endif
/* This code uses the FP instructions which may be set up for Lisp
* so they need to be saved and reset for C. */
fpu_save(fpu_state);
- /* highest generation to print */
- if (verbose)
- gens = SCRATCH_GENERATION;
- else
- gens = PSEUDO_STATIC_GENERATION;
-
/* Print the heap stats. */
- fprintf(stderr,
+ fprintf(file,
" Gen StaPg UbSta LaSta LUbSt Boxed Unboxed LB LUB !move Alloc Waste Trig WP GCs Mem-age\n");
- for (i = 0; i < gens; i++) {
+ for (i = 0; i < SCRATCH_GENERATION; i++) {
page_index_t j;
- long boxed_cnt = 0;
- long unboxed_cnt = 0;
- long large_boxed_cnt = 0;
- long large_unboxed_cnt = 0;
- long pinned_cnt=0;
+ page_index_t boxed_cnt = 0;
+ page_index_t unboxed_cnt = 0;
+ page_index_t large_boxed_cnt = 0;
+ page_index_t large_unboxed_cnt = 0;
+ page_index_t pinned_cnt=0;
for (j = 0; j < last_free_page; j++)
if (page_table[j].gen == i) {
gc_assert(generations[i].bytes_allocated
== count_generation_bytes_allocated(i));
- fprintf(stderr,
- " %1d: %5ld %5ld %5ld %5ld %5ld %5ld %5ld %5ld %5ld %8ld %5ld %8ld %4ld %3d %7.4f\n",
+ fprintf(file,
+ " %1d: %5ld %5ld %5ld %5ld",
i,
generations[i].alloc_start_page,
generations[i].alloc_unboxed_start_page,
generations[i].alloc_large_start_page,
- generations[i].alloc_large_unboxed_start_page,
- boxed_cnt,
- unboxed_cnt,
- large_boxed_cnt,
- large_unboxed_cnt,
- pinned_cnt,
+ generations[i].alloc_large_unboxed_start_page);
+ fprintf(file,
+ " %5"PAGE_INDEX_FMT" %5"PAGE_INDEX_FMT" %5"PAGE_INDEX_FMT
+ " %5"PAGE_INDEX_FMT" %5"PAGE_INDEX_FMT,
+ boxed_cnt, unboxed_cnt, large_boxed_cnt,
+ large_unboxed_cnt, pinned_cnt);
+ fprintf(file,
+ " %8"OS_VM_SIZE_FMT
+ " %5"OS_VM_SIZE_FMT
+ " %8"OS_VM_SIZE_FMT
+ " %4"PAGE_INDEX_FMT" %3d %7.4f\n",
generations[i].bytes_allocated,
- (npage_bytes(count_generation_pages(i))
- - generations[i].bytes_allocated),
+ (npage_bytes(count_generation_pages(i)) - generations[i].bytes_allocated),
generations[i].gc_trigger,
count_write_protect_generation_pages(i),
generations[i].num_gc,
- gen_av_mem_age(i));
+ generation_average_age(i));
}
- fprintf(stderr," Total bytes allocated = %lu\n", bytes_allocated);
- fprintf(stderr," Dynamic-space-size bytes = %lu\n", dynamic_space_size);
+ fprintf(file," Total bytes allocated = %"OS_VM_SIZE_FMT"\n", bytes_allocated);
+ fprintf(file," Dynamic-space-size bytes = %"OS_VM_SIZE_FMT"\n", dynamic_space_size);
fpu_restore(fpu_state);
}
+
+extern void
+write_heap_exhaustion_report(FILE *file, long available, long requested,
+ struct thread *thread)
+{
+ fprintf(file,
+ "Heap exhausted during %s: %ld bytes available, %ld requested.\n",
+ gc_active_p ? "garbage collection" : "allocation",
+ available,
+ requested);
+ write_generation_stats(file);
+ fprintf(file, "GC control variables:\n");
+ fprintf(file, " *GC-INHIBIT* = %s\n *GC-PENDING* = %s\n",
+ SymbolValue(GC_INHIBIT,thread)==NIL ? "false" : "true",
+ (SymbolValue(GC_PENDING, thread) == T) ?
+ "true" : ((SymbolValue(GC_PENDING, thread) == NIL) ?
+ "false" : "in progress"));
+#ifdef LISP_FEATURE_SB_THREAD
+ fprintf(file, " *STOP-FOR-GC-PENDING* = %s\n",
+ SymbolValue(STOP_FOR_GC_PENDING,thread)==NIL ? "false" : "true");
+#endif
+}
+
+extern void
+print_generation_stats(void)
+{
+ write_generation_stats(stderr);
+}
+
+extern char* gc_logfile;
+char * gc_logfile = NULL;
+
+extern void
+log_generation_stats(char *logfile, char *header)
+{
+ if (logfile) {
+ FILE * log = fopen(logfile, "a");
+ if (log) {
+ fprintf(log, "%s\n", header);
+ write_generation_stats(log);
+ fclose(log);
+ } else {
+ fprintf(stderr, "Could not open gc logfile: %s\n", logfile);
+ fflush(stderr);
+ }
+ }
+}
+
+extern void
+report_heap_exhaustion(long available, long requested, struct thread *th)
+{
+ if (gc_logfile) {
+ FILE * log = fopen(gc_logfile, "a");
+ if (log) {
+ write_heap_exhaustion_report(log, available, requested, th);
+ fclose(log);
+ } else {
+ fprintf(stderr, "Could not open gc logfile: %s\n", gc_logfile);
+ fflush(stderr);
+ }
+ }
+ /* Always to stderr as well. */
+ write_heap_exhaustion_report(stderr, available, requested, th);
+}
\f
-#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
+#if defined(LISP_FEATURE_X86)
void fast_bzero(void*, size_t); /* in <arch>-assem.S */
#endif
* OS. Generally done after a large GC.
*/
void zero_pages_with_mmap(page_index_t start, page_index_t end) {
- int i;
+ page_index_t i;
void *addr = page_address(start), *new_addr;
- size_t length = npage_bytes(1+end-start);
+ os_vm_size_t length = npage_bytes(1+end-start);
if (start > end)
return;
+ gc_assert(length >= gencgc_release_granularity);
+ gc_assert((length % gencgc_release_granularity) == 0);
+
os_invalidate(addr, length);
new_addr = os_validate(addr, length);
if (new_addr == NULL || new_addr != addr) {
}
+static void
+zero_and_mark_pages(page_index_t start, page_index_t end) {
+ page_index_t i;
+
+ zero_pages(start, end);
+ for (i = start; i <= end; i++)
+ page_table[i].need_to_zero = 0;
+}
+
/* Zero the pages from START to END (inclusive), except for those
* pages that are known to already zeroed. Mark all pages in the
* ranges as non-zeroed.
*/
static void
zero_dirty_pages(page_index_t start, page_index_t end) {
- page_index_t i;
+ page_index_t i, j;
for (i = start; i <= end; i++) {
- if (page_table[i].need_to_zero == 1) {
- zero_pages(start, end);
- break;
- }
+ if (!page_table[i].need_to_zero) continue;
+ for (j = i+1; (j <= end) && (page_table[j].need_to_zero); j++);
+ zero_pages(i, j-1);
+ i = j;
}
for (i = start; i <= end; i++) {
* are allocated, although they will initially be empty.
*/
static void
-gc_alloc_new_region(long nbytes, int page_type_flag, struct alloc_region *alloc_region)
+gc_alloc_new_region(sword_t nbytes, int page_type_flag, struct alloc_region *alloc_region)
{
page_index_t first_page;
page_index_t last_page;
- unsigned long bytes_found;
+ os_vm_size_t bytes_found;
page_index_t i;
int ret;
gc_assert(ret == 0);
first_page = generation_alloc_start_page(gc_alloc_generation, page_type_flag, 0);
last_page=gc_find_freeish_pages(&first_page, nbytes, page_type_flag);
- bytes_found=(PAGE_BYTES - page_table[first_page].bytes_used)
+ bytes_found=(GENCGC_CARD_BYTES - page_table[first_page].bytes_used)
+ npage_bytes(last_page-first_page);
/* Set up the alloc_region. */
page_table[first_page].allocated = page_type_flag;
page_table[first_page].gen = gc_alloc_generation;
page_table[first_page].large_object = 0;
- page_table[first_page].region_start_offset = 0;
+ page_table[first_page].scan_start_offset = 0;
}
gc_assert(page_table[first_page].allocated == page_type_flag);
page_table[i].large_object = 0;
/* This may not be necessary for unboxed regions (think it was
* broken before!) */
- page_table[i].region_start_offset =
+ page_table[i].scan_start_offset =
void_diff(page_address(i),alloc_region->start_addr);
page_table[i].allocated |= OPEN_REGION_PAGE_FLAG ;
}
/* 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++) {
+ word_t *p;
+ for (p = (word_t *)alloc_region->start_addr;
+ p < (word_t *)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 (start=%p, end=%p).\n",
+ lose("The new region is not zero at %p (start=%p, end=%p).\n",
p, alloc_region->start_addr, alloc_region->end_addr);
}
}
size_t size;
};
static struct new_area (*new_areas)[];
-static long new_areas_index;
-long max_new_areas;
+static size_t new_areas_index;
+size_t max_new_areas;
/* Add a new area to new_areas. */
static void
add_new_area(page_index_t first_page, size_t offset, size_t size)
{
- unsigned long new_area_start,c;
- long i;
+ size_t new_area_start, c;
+ ssize_t i;
/* Ignore if full. */
if (new_areas_index >= NUM_NEW_AREAS)
/* 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 long area_end =
+ size_t area_end =
npage_bytes((*new_areas)[i].page)
+ (*new_areas)[i].offset
+ (*new_areas)[i].size;
void
gc_alloc_update_page_tables(int page_type_flag, struct alloc_region *alloc_region)
{
- int more;
+ boolean more;
page_index_t first_page;
page_index_t next_page;
- unsigned long bytes_used;
- unsigned long orig_first_page_bytes_used;
- unsigned long region_size;
- unsigned long byte_cnt;
+ os_vm_size_t bytes_used;
+ os_vm_size_t region_size;
+ os_vm_size_t byte_cnt;
+ page_bytes_t orig_first_page_bytes_used;
int ret;
/* Update the first page. */
/* If the page was free then set up the gen, and
- * region_start_offset. */
+ * scan_start_offset. */
if (page_table[first_page].bytes_used == 0)
- gc_assert(page_table[first_page].region_start_offset == 0);
+ gc_assert(page_starts_contiguous_block_p(first_page));
page_table[first_page].allocated &= ~(OPEN_REGION_PAGE_FLAG);
gc_assert(page_table[first_page].allocated & page_type_flag);
more = 0;
if ((bytes_used = void_diff(alloc_region->free_pointer,
page_address(first_page)))
- >PAGE_BYTES) {
- bytes_used = PAGE_BYTES;
+ >GENCGC_CARD_BYTES) {
+ bytes_used = GENCGC_CARD_BYTES;
more = 1;
}
page_table[first_page].bytes_used = bytes_used;
/* All the rest of the pages should be free. We need to set
- * their region_start_offset pointer to the start of the
+ * their scan_start_offset pointer to the start of the
* region, and set the bytes_used. */
while (more) {
page_table[next_page].allocated &= ~(OPEN_REGION_PAGE_FLAG);
gc_assert(page_table[next_page].gen == gc_alloc_generation);
gc_assert(page_table[next_page].large_object == 0);
- gc_assert(page_table[next_page].region_start_offset ==
+ gc_assert(page_table[next_page].scan_start_offset ==
void_diff(page_address(next_page),
alloc_region->start_addr));
/* Calculate the number of bytes used in this page. */
more = 0;
if ((bytes_used = void_diff(alloc_region->free_pointer,
- page_address(next_page)))>PAGE_BYTES) {
- bytes_used = PAGE_BYTES;
+ page_address(next_page)))>GENCGC_CARD_BYTES) {
+ bytes_used = GENCGC_CARD_BYTES;
more = 1;
}
page_table[next_page].bytes_used = bytes_used;
gc_set_region_empty(alloc_region);
}
-static inline void *gc_quick_alloc(long nbytes);
+static inline void *gc_quick_alloc(word_t nbytes);
/* Allocate a possibly large object. */
void *
-gc_alloc_large(long nbytes, int page_type_flag, struct alloc_region *alloc_region)
+gc_alloc_large(sword_t nbytes, int page_type_flag, struct alloc_region *alloc_region)
{
- page_index_t first_page;
- page_index_t last_page;
- int orig_first_page_bytes_used;
- long byte_cnt;
- int more;
- long bytes_used;
- page_index_t next_page;
+ boolean more;
+ page_index_t first_page, next_page, last_page;
+ page_bytes_t orig_first_page_bytes_used;
+ os_vm_size_t byte_cnt;
+ os_vm_size_t bytes_used;
int ret;
ret = thread_mutex_lock(&free_pages_lock);
orig_first_page_bytes_used = page_table[first_page].bytes_used;
/* If the first page was free then set up the gen, and
- * region_start_offset. */
+ * scan_start_offset. */
if (page_table[first_page].bytes_used == 0) {
page_table[first_page].allocated = page_type_flag;
page_table[first_page].gen = gc_alloc_generation;
- page_table[first_page].region_start_offset = 0;
+ page_table[first_page].scan_start_offset = 0;
page_table[first_page].large_object = 1;
}
/* 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) > PAGE_BYTES) {
- bytes_used = PAGE_BYTES;
+ if ((bytes_used = nbytes+orig_first_page_bytes_used) > GENCGC_CARD_BYTES) {
+ bytes_used = GENCGC_CARD_BYTES;
more = 1;
}
page_table[first_page].bytes_used = bytes_used;
next_page = first_page+1;
/* All the rest of the pages should be free. We need to set their
- * region_start_offset pointer to the start of the region, and set
+ * scan_start_offset pointer to the start of the region, and set
* the bytes_used. */
while (more) {
gc_assert(page_free_p(next_page));
page_table[next_page].gen = gc_alloc_generation;
page_table[next_page].large_object = 1;
- page_table[next_page].region_start_offset =
+ page_table[next_page].scan_start_offset =
npage_bytes(next_page-first_page) - orig_first_page_bytes_used;
/* Calculate the number of bytes used in this page. */
more = 0;
bytes_used=(nbytes+orig_first_page_bytes_used)-byte_cnt;
- if (bytes_used > PAGE_BYTES) {
- bytes_used = PAGE_BYTES;
+ if (bytes_used > GENCGC_CARD_BYTES) {
+ bytes_used = GENCGC_CARD_BYTES;
more = 1;
}
page_table[next_page].bytes_used = bytes_used;
static page_index_t gencgc_alloc_start_page = -1;
void
-gc_heap_exhausted_error_or_lose (long available, long requested)
+gc_heap_exhausted_error_or_lose (sword_t available, sword_t requested)
{
+ struct thread *thread = arch_os_get_current_thread();
/* Write basic information before doing anything else: if we don't
* call to lisp this is a must, and even if we do there is always
* the danger that we bounce back here before the error has been
* handled, or indeed even printed.
*/
- fprintf(stderr, "Heap exhausted during %s: %ld bytes available, %ld requested.\n",
- gc_active_p ? "garbage collection" : "allocation",
- available, requested);
+ report_heap_exhaustion(available, requested, thread);
if (gc_active_p || (available == 0)) {
/* If we are in GC, or totally out of memory there is no way
* to sanely transfer control to the lisp-side of things.
*/
- struct thread *thread = arch_os_get_current_thread();
- print_generation_stats(1);
- fprintf(stderr, "GC control variables:\n");
- fprintf(stderr, " *GC-INHIBIT* = %s\n *GC-PENDING* = %s\n",
- SymbolValue(GC_INHIBIT,thread)==NIL ? "false" : "true",
- SymbolValue(GC_PENDING,thread)==NIL ? "false" : "true");
-#ifdef LISP_FEATURE_SB_THREAD
- fprintf(stderr, " *STOP-FOR-GC-PENDING* = %s\n",
- SymbolValue(STOP_FOR_GC_PENDING,thread)==NIL ? "false" : "true");
-#endif
lose("Heap exhausted, game over.");
}
else {
/* FIXME: assert free_pages_lock held */
(void)thread_mutex_unlock(&free_pages_lock);
+#if !(defined(LISP_FEATURE_WIN32) && defined(LISP_FEATURE_SB_THREAD))
+ gc_assert(get_pseudo_atomic_atomic(thread));
+ clear_pseudo_atomic_atomic(thread);
+ if (get_pseudo_atomic_interrupted(thread))
+ do_pending_interrupt();
+#endif
+ /* Another issue is that signalling HEAP-EXHAUSTED error leads
+ * to running user code at arbitrary places, even in a
+ * WITHOUT-INTERRUPTS which may lead to a deadlock without
+ * running out of the heap. So at this point all bets are
+ * off. */
+ if (SymbolValue(INTERRUPTS_ENABLED,thread) == NIL)
+ corruption_warning_and_maybe_lose
+ ("Signalling HEAP-EXHAUSTED in a WITHOUT-INTERRUPTS.");
funcall2(StaticSymbolFunction(HEAP_EXHAUSTED_ERROR),
alloc_number(available), alloc_number(requested));
lose("HEAP-EXHAUSTED-ERROR fell through");
}
page_index_t
-gc_find_freeish_pages(page_index_t *restart_page_ptr, long nbytes, int page_type_flag)
+gc_find_freeish_pages(page_index_t *restart_page_ptr, sword_t bytes,
+ int page_type_flag)
{
- page_index_t first_page, last_page;
- page_index_t restart_page = *restart_page_ptr;
- long bytes_found = 0;
- long most_bytes_found = 0;
+ page_index_t most_bytes_found_from = 0, most_bytes_found_to = 0;
+ page_index_t first_page, last_page, restart_page = *restart_page_ptr;
+ os_vm_size_t nbytes = bytes;
+ os_vm_size_t nbytes_goal = nbytes;
+ os_vm_size_t bytes_found = 0;
+ os_vm_size_t most_bytes_found = 0;
+ boolean small_object = nbytes < GENCGC_CARD_BYTES;
/* FIXME: assert(free_pages_lock is held); */
+ if (nbytes_goal < gencgc_alloc_granularity)
+ nbytes_goal = gencgc_alloc_granularity;
+
/* Toggled by gc_and_save for heap compaction, normally -1. */
if (gencgc_alloc_start_page != -1) {
restart_page = gencgc_alloc_start_page;
}
- if (nbytes>=PAGE_BYTES) {
- /* Search for a contiguous free space of at least nbytes,
- * aligned on a page boundary. The page-alignment is strictly
- * speaking needed only for objects at least large_object_size
- * bytes in size. */
- do {
- first_page = restart_page;
- while ((first_page < page_table_pages) &&
- page_allocated_p(first_page))
+ /* FIXME: This is on bytes instead of nbytes pending cleanup of
+ * long from the interface. */
+ gc_assert(bytes>=0);
+ /* Search for a page with at least nbytes of space. We prefer
+ * not to split small objects on multiple pages, to reduce the
+ * number of contiguous allocation regions spaning multiple
+ * pages: this helps avoid excessive conservativism.
+ *
+ * For other objects, we guarantee that they start on their own
+ * page boundary.
+ */
+ first_page = restart_page;
+ while (first_page < page_table_pages) {
+ bytes_found = 0;
+ if (page_free_p(first_page)) {
+ gc_assert(0 == page_table[first_page].bytes_used);
+ bytes_found = GENCGC_CARD_BYTES;
+ } else if (small_object &&
+ (page_table[first_page].allocated == page_type_flag) &&
+ (page_table[first_page].large_object == 0) &&
+ (page_table[first_page].gen == gc_alloc_generation) &&
+ (page_table[first_page].write_protected == 0) &&
+ (page_table[first_page].dont_move == 0)) {
+ bytes_found = GENCGC_CARD_BYTES - page_table[first_page].bytes_used;
+ if (bytes_found < nbytes) {
+ if (bytes_found > most_bytes_found)
+ most_bytes_found = bytes_found;
first_page++;
-
- last_page = first_page;
- bytes_found = PAGE_BYTES;
- while ((bytes_found < nbytes) &&
- (last_page < (page_table_pages-1)) &&
- page_free_p(last_page+1)) {
- last_page++;
- bytes_found += PAGE_BYTES;
- gc_assert(0 == page_table[last_page].bytes_used);
- gc_assert(0 == page_table[last_page].write_protected);
+ continue;
}
- if (bytes_found > most_bytes_found)
- most_bytes_found = bytes_found;
- restart_page = last_page + 1;
- } while ((restart_page < page_table_pages) && (bytes_found < nbytes));
-
- } else {
- /* Search for a page with at least nbytes of space. We prefer
- * not to split small objects on multiple pages, to reduce the
- * number of contiguous allocation regions spaning multiple
- * pages: this helps avoid excessive conservativism. */
- first_page = restart_page;
- while (first_page < page_table_pages) {
- if (page_free_p(first_page))
- {
- gc_assert(0 == page_table[first_page].bytes_used);
- bytes_found = PAGE_BYTES;
- break;
- }
- else if ((page_table[first_page].allocated == page_type_flag) &&
- (page_table[first_page].large_object == 0) &&
- (page_table[first_page].gen == gc_alloc_generation) &&
- (page_table[first_page].write_protected == 0) &&
- (page_table[first_page].dont_move == 0))
- {
- bytes_found = PAGE_BYTES
- - page_table[first_page].bytes_used;
- if (bytes_found > most_bytes_found)
- most_bytes_found = bytes_found;
- if (bytes_found >= nbytes)
- break;
- }
+ } else {
first_page++;
+ continue;
}
- last_page = first_page;
- restart_page = first_page + 1;
+
+ gc_assert(page_table[first_page].write_protected == 0);
+ for (last_page = first_page+1;
+ ((last_page < page_table_pages) &&
+ page_free_p(last_page) &&
+ (bytes_found < nbytes_goal));
+ last_page++) {
+ bytes_found += GENCGC_CARD_BYTES;
+ gc_assert(0 == page_table[last_page].bytes_used);
+ gc_assert(0 == page_table[last_page].write_protected);
+ }
+
+ if (bytes_found > most_bytes_found) {
+ most_bytes_found = bytes_found;
+ most_bytes_found_from = first_page;
+ most_bytes_found_to = last_page;
+ }
+ if (bytes_found >= nbytes_goal)
+ break;
+
+ first_page = last_page;
}
+ bytes_found = most_bytes_found;
+ restart_page = first_page + 1;
+
/* Check for a failure */
if (bytes_found < nbytes) {
gc_assert(restart_page >= page_table_pages);
gc_heap_exhausted_error_or_lose(most_bytes_found, nbytes);
}
- gc_assert(page_table[first_page].write_protected == 0);
-
- *restart_page_ptr = first_page;
- return last_page;
+ gc_assert(most_bytes_found_to);
+ *restart_page_ptr = most_bytes_found_from;
+ return most_bytes_found_to-1;
}
/* Allocate bytes. All the rest of the special-purpose allocation
* functions will eventually call this */
void *
-gc_alloc_with_region(long nbytes,int page_type_flag, struct alloc_region *my_region,
+gc_alloc_with_region(sword_t nbytes,int page_type_flag, struct alloc_region *my_region,
int quick_p)
{
void *new_free_pointer;
* region */
static inline void *
-gc_quick_alloc(long nbytes)
+gc_quick_alloc(word_t nbytes)
{
return gc_general_alloc(nbytes, BOXED_PAGE_FLAG, ALLOC_QUICK);
}
static inline void *
-gc_quick_alloc_large(long nbytes)
-{
- return gc_general_alloc(nbytes, BOXED_PAGE_FLAG ,ALLOC_QUICK);
-}
-
-static inline void *
-gc_alloc_unboxed(long nbytes)
+gc_alloc_unboxed(word_t nbytes)
{
return gc_general_alloc(nbytes, UNBOXED_PAGE_FLAG, 0);
}
static inline void *
-gc_quick_alloc_unboxed(long nbytes)
-{
- return gc_general_alloc(nbytes, UNBOXED_PAGE_FLAG, ALLOC_QUICK);
-}
-
-static inline void *
-gc_quick_alloc_large_unboxed(long nbytes)
+gc_quick_alloc_unboxed(word_t nbytes)
{
return gc_general_alloc(nbytes, UNBOXED_PAGE_FLAG, ALLOC_QUICK);
}
\f
-
-/* 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;
- page_index_t first_page;
-
- gc_assert(is_lisp_pointer(object));
- gc_assert(from_space_p(object));
- gc_assert((nwords & 0x01) == 0);
-
-
- /* Check whether it's in a large object region. */
- first_page = find_page_index((void *)object);
- gc_assert(first_page >= 0);
-
- if (page_table[first_page].large_object) {
-
- /* Promote the object. */
-
- unsigned long remaining_bytes;
- page_index_t next_page;
- unsigned long bytes_freed;
- unsigned long old_bytes_used;
-
- /* Note: Any page write-protection must be removed, else a
- * later scavenge_newspace may incorrectly not scavenge these
- * pages. This would not be necessary if they are added to the
- * new areas, but let's do it for them all (they'll probably
- * be written anyway?). */
-
- gc_assert(page_table[first_page].region_start_offset == 0);
-
- next_page = first_page;
- remaining_bytes = nwords*N_WORD_BYTES;
- while (remaining_bytes > PAGE_BYTES) {
- gc_assert(page_table[next_page].gen == from_space);
- gc_assert(page_boxed_p(next_page));
- gc_assert(page_table[next_page].large_object);
- gc_assert(page_table[next_page].region_start_offset ==
- npage_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), PAGE_BYTES, OS_VM_PROT_ALL);
- page_table[next_page].write_protected = 0;
- }
- remaining_bytes -= PAGE_BYTES;
- next_page++;
- }
-
- /* Now only one page remains, but the object may have shrunk
- * so there may be more unused pages which will be freed. */
-
- /* The object may have shrunk but shouldn't have grown. */
- gc_assert(page_table[next_page].bytes_used >= remaining_bytes);
-
- page_table[next_page].gen = new_space;
- gc_assert(page_boxed_p(next_page));
-
- /* Adjust the bytes_used. */
- old_bytes_used = page_table[next_page].bytes_used;
- page_table[next_page].bytes_used = remaining_bytes;
-
- bytes_freed = old_bytes_used - remaining_bytes;
-
- /* Free any remaining pages; needs care. */
- next_page++;
- while ((old_bytes_used == PAGE_BYTES) &&
- (page_table[next_page].gen == from_space) &&
- page_boxed_p(next_page) &&
- page_table[next_page].large_object &&
- (page_table[next_page].region_start_offset ==
- npage_bytes(next_page - first_page))) {
- /* 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_FLAG;
- page_table[next_page].bytes_used = 0;
- bytes_freed += old_bytes_used;
- next_page++;
- }
-
- 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*N_WORD_BYTES);
-
- return(object);
- } else {
- /* Get tag of object. */
- tag = lowtag_of(object);
-
- /* Allocate space. */
- 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 */
-lispobj
-copy_unboxed_object(lispobj object, long nwords)
-{
- long tag;
- lispobj *new;
-
- gc_assert(is_lisp_pointer(object));
- gc_assert(from_space_p(object));
- gc_assert((nwords & 0x01) == 0);
-
- /* Get tag of object. */
- tag = lowtag_of(object);
-
- /* Allocate space. */
- 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;
-}
-
-/* to copy large unboxed objects
- *
- * 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.
+/* Copy a large 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.
*
* Bignums and vectors may have shrunk. If the object is not copied
- * the space needs to be reclaimed, and the page_tables corrected.
- *
- * KLUDGE: There's a lot of cut-and-paste duplication between this
- * function and copy_large_object(..). -- WHN 20000619 */
-lispobj
-copy_large_unboxed_object(lispobj object, long nwords)
+ * the space needs to be reclaimed, and the page_tables corrected. */
+static lispobj
+general_copy_large_object(lispobj object, word_t nwords, boolean boxedp)
{
int tag;
lispobj *new;
gc_assert((nwords & 0x01) == 0);
if ((nwords > 1024*1024) && gencgc_verbose) {
- FSHOW((stderr, "/copy_large_unboxed_object: %d bytes\n",
+ FSHOW((stderr, "/general_copy_large_object: %d bytes\n",
nwords*N_WORD_BYTES));
}
/* 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. */
- unsigned long remaining_bytes;
+ os_vm_size_t remaining_bytes;
+ os_vm_size_t bytes_freed;
page_index_t next_page;
- unsigned long bytes_freed;
- unsigned long old_bytes_used;
+ page_bytes_t old_bytes_used;
- gc_assert(page_table[first_page].region_start_offset == 0);
+ /* FIXME: This comment is somewhat stale.
+ *
+ * Note: Any page write-protection must be removed, else a
+ * later scavenge_newspace may incorrectly not scavenge these
+ * pages. This would not be necessary if they are added to the
+ * new areas, but let's do it for them all (they'll probably
+ * be written anyway?). */
+ gc_assert(page_starts_contiguous_block_p(first_page));
next_page = first_page;
remaining_bytes = nwords*N_WORD_BYTES;
- while (remaining_bytes > PAGE_BYTES) {
+
+ while (remaining_bytes > GENCGC_CARD_BYTES) {
gc_assert(page_table[next_page].gen == from_space);
- gc_assert(page_allocated_no_region_p(next_page));
gc_assert(page_table[next_page].large_object);
- gc_assert(page_table[next_page].region_start_offset ==
+ gc_assert(page_table[next_page].scan_start_offset ==
npage_bytes(next_page-first_page));
- gc_assert(page_table[next_page].bytes_used == PAGE_BYTES);
-
+ gc_assert(page_table[next_page].bytes_used == GENCGC_CARD_BYTES);
+ /* Should have been unprotected by unprotect_oldspace()
+ * for boxed objects, and after promotion unboxed ones
+ * should not be on protected pages at all. */
+ gc_assert(!page_table[next_page].write_protected);
+
+ if (boxedp)
+ gc_assert(page_boxed_p(next_page));
+ else {
+ gc_assert(page_allocated_no_region_p(next_page));
+ page_table[next_page].allocated = UNBOXED_PAGE_FLAG;
+ }
page_table[next_page].gen = new_space;
- page_table[next_page].allocated = UNBOXED_PAGE_FLAG;
- remaining_bytes -= PAGE_BYTES;
+
+ remaining_bytes -= GENCGC_CARD_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_FLAG;
+
+ if (boxedp)
+ gc_assert(page_boxed_p(next_page));
+ else
+ 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 == PAGE_BYTES) &&
+ while ((old_bytes_used == GENCGC_CARD_BYTES) &&
(page_table[next_page].gen == from_space) &&
- page_allocated_no_region_p(next_page) &&
+ /* FIXME: It is not obvious to me why this is necessary
+ * as a loop condition: it seems to me that the
+ * scan_start_offset test should be sufficient, but
+ * experimentally that is not the case. --NS
+ * 2011-11-28 */
+ (boxedp ?
+ page_boxed_p(next_page) :
+ page_allocated_no_region_p(next_page)) &&
page_table[next_page].large_object &&
- (page_table[next_page].region_start_offset ==
+ (page_table[next_page].scan_start_offset ==
npage_bytes(next_page - first_page))) {
/* Checks out OK, free the page. Don't need to both zeroing
* pages as this should have been done before shrinking the
if ((bytes_freed > 0) && gencgc_verbose) {
FSHOW((stderr,
- "/copy_large_unboxed bytes_freed=%d\n",
+ "/general_copy_large_object bytes_freed=%"OS_VM_SIZE_FMT"\n",
bytes_freed));
}
- generations[from_space].bytes_allocated -=
- nwords*N_WORD_BYTES + bytes_freed;
+ generations[from_space].bytes_allocated -= nwords*N_WORD_BYTES
+ + bytes_freed;
generations[new_space].bytes_allocated += nwords*N_WORD_BYTES;
bytes_allocated -= bytes_freed;
+ /* Add the region to the new_areas if requested. */
+ if (boxedp)
+ add_new_area(first_page,0,nwords*N_WORD_BYTES);
+
return(object);
- }
- else {
+
+ } else {
/* Get tag of object. */
tag = lowtag_of(object);
/* Allocate space. */
- new = gc_quick_alloc_large_unboxed(nwords*N_WORD_BYTES);
+ new = gc_general_alloc(nwords*N_WORD_BYTES,
+ (boxedp ? BOXED_PAGE_FLAG : UNBOXED_PAGE_FLAG),
+ ALLOC_QUICK);
/* Copy the object. */
memcpy(new,native_pointer(object),nwords*N_WORD_BYTES);
}
}
+lispobj
+copy_large_object(lispobj object, sword_t nwords)
+{
+ return general_copy_large_object(object, nwords, 1);
+}
+lispobj
+copy_large_unboxed_object(lispobj object, sword_t nwords)
+{
+ return general_copy_large_object(object, nwords, 0);
+}
+/* to copy unboxed objects */
+lispobj
+copy_unboxed_object(lispobj object, sword_t nwords)
+{
+ return gc_general_copy_object(object, nwords, UNBOXED_PAGE_FLAG);
+}
\f
/*
*
* Currently only absolute fixups to the constant vector, or to the
* code area are checked. */
+#ifdef LISP_FEATURE_X86
void
-sniff_code_object(struct code *code, unsigned long displacement)
+sniff_code_object(struct code *code, os_vm_size_t displacement)
{
-#ifdef LISP_FEATURE_X86
- long nheader_words, ncode_words, nwords;
- void *p;
- void *constants_start_addr = NULL, *constants_end_addr;
- void *code_start_addr, *code_end_addr;
+ sword_t nheader_words, ncode_words, nwords;
+ os_vm_address_t constants_start_addr = NULL, constants_end_addr, p;
+ os_vm_address_t code_start_addr, code_end_addr;
+ os_vm_address_t code_addr = (os_vm_address_t)code;
int fixup_found = 0;
if (!check_code_fixups)
nheader_words = HeaderValue(*(lispobj *)code);
nwords = ncode_words + nheader_words;
- 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;
+ constants_start_addr = code_addr + 5*N_WORD_BYTES;
+ constants_end_addr = code_addr + nheader_words*N_WORD_BYTES;
+ code_start_addr = code_addr + nheader_words*N_WORD_BYTES;
+ code_end_addr = code_addr + 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);
-#ifdef QSHOW
+#if QSHOW
unsigned d5 = *((unsigned char *)p - 5);
unsigned d6 = *((unsigned char *)p - 6);
#endif
/* Check for code references. */
/* Check for a 32 bit word that looks like an absolute
reference to within the code adea of the code object. */
- if ((data >= (code_start_addr-displacement))
- && (data < (code_end_addr-displacement))) {
+ if ((data >= (void*)(code_start_addr-displacement))
+ && (data < (void*)(code_end_addr-displacement))) {
/* function header */
if ((d4 == 0x5e)
&& (((unsigned)p - 4 - 4*HeaderValue(*((unsigned *)p-1))) ==
/* Check for a 32 bit word that looks like an absolute
reference to within the constant vector. Constant references
will be aligned. */
- if ((data >= (constants_start_addr-displacement))
- && (data < (constants_end_addr-displacement))
+ if ((data >= (void*)(constants_start_addr-displacement))
+ && (data < (void*)(constants_end_addr-displacement))
&& (((unsigned)data & 0x3) == 0)) {
/* Mov eax,m32 */
if (d1 == 0xa1) {
"/code start = %x, end = %x\n",
code_start_addr, code_end_addr));
}
-#endif
}
+#endif
+#ifdef LISP_FEATURE_X86
void
gencgc_apply_code_fixups(struct code *old_code, struct code *new_code)
{
-/* x86-64 uses pc-relative addressing instead of this kludge */
-#ifndef LISP_FEATURE_X86_64
- long nheader_words, ncode_words, nwords;
- void *constants_start_addr, *constants_end_addr;
- void *code_start_addr, *code_end_addr;
+ sword_t nheader_words, ncode_words, nwords;
+ os_vm_address_t constants_start_addr, constants_end_addr;
+ os_vm_address_t code_start_addr, code_end_addr;
+ os_vm_address_t code_addr = (os_vm_address_t)new_code;
+ os_vm_address_t old_addr = (os_vm_address_t)old_code;
+ os_vm_size_t displacement = code_addr - old_addr;
lispobj fixups = NIL;
- unsigned long displacement =
- (unsigned long)new_code - (unsigned long)old_code;
struct vector *fixups_vector;
ncode_words = fixnum_value(new_code->code_size);
/* 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*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;
+ constants_start_addr = code_addr + 5*N_WORD_BYTES;
+ constants_end_addr = code_addr + nheader_words*N_WORD_BYTES;
+ code_start_addr = code_addr + nheader_words*N_WORD_BYTES;
+ code_end_addr = code_addr + nwords*N_WORD_BYTES;
/*
FSHOW((stderr,
"/const start = %x, end = %x\n",
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. */
- long length = fixnum_value(fixups_vector->length);
- long i;
+ sword_t length = fixnum_value(fixups_vector->length);
+ sword_t i;
for (i = 0; i < length; i++) {
- unsigned long offset = fixups_vector->data[i];
+ long offset = fixups_vector->data[i];
/* Now check the current value of offset. */
- unsigned long old_value =
- *(unsigned long *)((unsigned long)code_start_addr + offset);
+ os_vm_address_t old_value = *(os_vm_address_t *)(code_start_addr + 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 long)old_code)
- && (old_value < ((unsigned long)old_code
- + nwords*N_WORD_BYTES)))
+ if ((old_value >= old_addr)
+ && (old_value < (old_addr + nwords*N_WORD_BYTES)))
/* So add the dispacement. */
- *(unsigned long *)((unsigned long)code_start_addr + offset) =
+ *(os_vm_address_t *)(code_start_addr + offset) =
old_value + displacement;
else
/* It is outside the old code object so it must be a
* relative fixup (absolute fixups are not saved). So
* subtract the displacement. */
- *(unsigned long *)((unsigned long)code_start_addr + offset) =
+ *(os_vm_address_t *)(code_start_addr + offset) =
old_value - displacement;
}
} else {
if (check_code_fixups) {
sniff_code_object(new_code,displacement);
}
-#endif
}
-
+#endif
static lispobj
trans_boxed_large(lispobj object)
{
lispobj header;
- unsigned long length;
+ uword_t length;
gc_assert(is_lisp_pointer(object));
trans_unboxed_large(lispobj object)
{
lispobj header;
- unsigned long length;
+ uword_t length;
gc_assert(is_lisp_pointer(object));
return copy_large_unboxed_object(object, length);
}
#endif
-
-\f
-/*
- * Lutexes. Using the normal finalization machinery for finalizing
- * lutexes is tricky, since the finalization depends on working lutexes.
- * So we track the lutexes in the GC and finalize them manually.
- */
-
-#if defined(LUTEX_WIDETAG)
-
-/*
- * Start tracking LUTEX in the GC, by adding it to the linked list of
- * lutexes in the nursery generation. The caller is responsible for
- * locking, and GCs must be inhibited until the registration is
- * complete.
- */
-void
-gencgc_register_lutex (struct lutex *lutex) {
- int index = find_page_index(lutex);
- generation_index_t gen;
- struct lutex *head;
-
- /* This lutex is in static space, so we don't need to worry about
- * finalizing it.
- */
- if (index == -1)
- return;
-
- gen = page_table[index].gen;
-
- gc_assert(gen >= 0);
- gc_assert(gen < NUM_GENERATIONS);
-
- head = generations[gen].lutexes;
-
- lutex->gen = gen;
- lutex->next = head;
- lutex->prev = NULL;
- if (head)
- head->prev = lutex;
- generations[gen].lutexes = lutex;
-}
-
-/*
- * Stop tracking LUTEX in the GC by removing it from the appropriate
- * linked lists. This will only be called during GC, so no locking is
- * needed.
- */
-void
-gencgc_unregister_lutex (struct lutex *lutex) {
- if (lutex->prev) {
- lutex->prev->next = lutex->next;
- } else {
- generations[lutex->gen].lutexes = lutex->next;
- }
-
- if (lutex->next) {
- lutex->next->prev = lutex->prev;
- }
-
- lutex->next = NULL;
- lutex->prev = NULL;
- lutex->gen = -1;
-}
-
-/*
- * Mark all lutexes in generation GEN as not live.
- */
-static void
-unmark_lutexes (generation_index_t gen) {
- struct lutex *lutex = generations[gen].lutexes;
-
- while (lutex) {
- lutex->live = 0;
- lutex = lutex->next;
- }
-}
-
-/*
- * Finalize all lutexes in generation GEN that have not been marked live.
- */
-static void
-reap_lutexes (generation_index_t gen) {
- struct lutex *lutex = generations[gen].lutexes;
-
- while (lutex) {
- struct lutex *next = lutex->next;
- if (!lutex->live) {
- lutex_destroy((tagged_lutex_t) lutex);
- gencgc_unregister_lutex(lutex);
- }
- lutex = next;
- }
-}
-
-/*
- * Mark LUTEX as live.
- */
-static void
-mark_lutex (lispobj tagged_lutex) {
- struct lutex *lutex = (struct lutex*) native_pointer(tagged_lutex);
-
- lutex->live = 1;
-}
-
-/*
- * Move all lutexes in generation FROM to generation TO.
- */
-static void
-move_lutexes (generation_index_t from, generation_index_t to) {
- struct lutex *tail = generations[from].lutexes;
-
- /* Nothing to move */
- if (!tail)
- return;
-
- /* Change the generation of the lutexes in FROM. */
- while (tail->next) {
- tail->gen = to;
- tail = tail->next;
- }
- tail->gen = to;
-
- /* Link the last lutex in the FROM list to the start of the TO list */
- tail->next = generations[to].lutexes;
-
- /* And vice versa */
- if (generations[to].lutexes) {
- generations[to].lutexes->prev = tail;
- }
-
- /* And update the generations structures to match this */
- generations[to].lutexes = generations[from].lutexes;
- generations[from].lutexes = NULL;
-}
-
-static long
-scav_lutex(lispobj *where, lispobj object)
-{
- mark_lutex((lispobj) where);
-
- return CEILING(sizeof(struct lutex)/sizeof(lispobj), 2);
-}
-
-static lispobj
-trans_lutex(lispobj object)
-{
- struct lutex *lutex = (struct lutex *) native_pointer(object);
- lispobj copied;
- size_t words = CEILING(sizeof(struct lutex)/sizeof(lispobj), 2);
- gc_assert(is_lisp_pointer(object));
- copied = copy_object(object, words);
-
- /* Update the links, since the lutex moved in memory. */
- if (lutex->next) {
- lutex->next->prev = (struct lutex *) native_pointer(copied);
- }
-
- if (lutex->prev) {
- lutex->prev->next = (struct lutex *) native_pointer(copied);
- } else {
- generations[lutex->gen].lutexes =
- (struct lutex *) native_pointer(copied);
- }
-
- return copied;
-}
-
-static long
-size_lutex(lispobj *where)
-{
- return CEILING(sizeof(struct lutex)/sizeof(lispobj), 2);
-}
-#endif /* LUTEX_WIDETAG */
-
\f
/*
* weak pointers
#define WEAK_POINTER_NWORDS \
CEILING((sizeof(struct weak_pointer) / sizeof(lispobj)), 2)
-static long
+static sword_t
scav_weak_pointer(lispobj *where, lispobj object)
{
/* Since we overwrite the 'next' field, we have to make
}
\f
-lispobj *
-search_read_only_space(void *pointer)
-{
- 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 (gc_search_space(start,
- (((lispobj *)pointer)+2)-start,
- (lispobj *) pointer));
-}
-
-lispobj *
-search_static_space(void *pointer)
-{
- 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 (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(void *pointer)
-{
- page_index_t page_index = find_page_index(pointer);
- lispobj *start;
-
- /* The address may be invalid, so do some checks. */
- if ((page_index == -1) || page_free_p(page_index))
- return NULL;
- start = (lispobj *)page_region_start(page_index);
- return (gc_search_space(start,
- (((lispobj *)pointer)+2)-start,
- (lispobj *)pointer));
-}
-
-#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
-
-/* Helper for valid_lisp_pointer_p and
- * possibly_valid_dynamic_space_pointer.
- *
- * pointer is the pointer to validate, and start_addr is the address
- * of the enclosing object.
- */
-static int
-looks_like_valid_lisp_pointer_p(lispobj *pointer, lispobj *start_addr)
-{
- if (!is_lisp_pointer((lispobj)pointer)) {
- return 0;
- }
-
- /* Check that the object pointed to is consistent with the pointer
- * low tag. */
- switch (lowtag_of((lispobj)pointer)) {
- case FUN_POINTER_LOWTAG:
- /* Start_addr should be the enclosing code object, or a closure
- * header. */
- switch (widetag_of(*start_addr)) {
- case CODE_HEADER_WIDETAG:
- /* This case is probably caught above. */
- break;
- case CLOSURE_HEADER_WIDETAG:
- case FUNCALLABLE_INSTANCE_HEADER_WIDETAG:
- if ((unsigned long)pointer !=
- ((unsigned long)start_addr+FUN_POINTER_LOWTAG)) {
- if (gencgc_verbose) {
- FSHOW((stderr,
- "/Wf2: %x %x %x\n",
- pointer, start_addr, *start_addr));
- }
- return 0;
- }
- break;
- default:
- if (gencgc_verbose) {
- FSHOW((stderr,
- "/Wf3: %x %x %x\n",
- pointer, start_addr, *start_addr));
- }
- return 0;
- }
- break;
- case LIST_POINTER_LOWTAG:
- if ((unsigned long)pointer !=
- ((unsigned long)start_addr+LIST_POINTER_LOWTAG)) {
- if (gencgc_verbose) {
- FSHOW((stderr,
- "/Wl1: %x %x %x\n",
- pointer, start_addr, *start_addr));
- }
- return 0;
- }
- /* Is it plausible cons? */
- if ((is_lisp_pointer(start_addr[0]) ||
- is_lisp_immediate(start_addr[0])) &&
- (is_lisp_pointer(start_addr[1]) ||
- is_lisp_immediate(start_addr[1])))
- break;
- else {
- if (gencgc_verbose) {
- FSHOW((stderr,
- "/Wl2: %x %x %x\n",
- pointer, start_addr, *start_addr));
- }
- return 0;
- }
- case INSTANCE_POINTER_LOWTAG:
- if ((unsigned long)pointer !=
- ((unsigned long)start_addr+INSTANCE_POINTER_LOWTAG)) {
- if (gencgc_verbose) {
- FSHOW((stderr,
- "/Wi1: %x %x %x\n",
- pointer, start_addr, *start_addr));
- }
- return 0;
- }
- if (widetag_of(start_addr[0]) != INSTANCE_HEADER_WIDETAG) {
- if (gencgc_verbose) {
- FSHOW((stderr,
- "/Wi2: %x %x %x\n",
- pointer, start_addr, *start_addr));
- }
- return 0;
- }
- break;
- case OTHER_POINTER_LOWTAG:
- if ((unsigned long)pointer !=
- ((unsigned long)start_addr+OTHER_POINTER_LOWTAG)) {
- if (gencgc_verbose) {
- FSHOW((stderr,
- "/Wo1: %x %x %x\n",
- pointer, start_addr, *start_addr));
- }
- return 0;
- }
- /* Is it plausible? Not a cons. XXX should check the headers. */
- if (is_lisp_pointer(start_addr[0]) || ((start_addr[0] & 3) == 0)) {
- if (gencgc_verbose) {
- FSHOW((stderr,
- "/Wo2: %x %x %x\n",
- pointer, start_addr, *start_addr));
- }
- return 0;
- }
- switch (widetag_of(start_addr[0])) {
- case UNBOUND_MARKER_WIDETAG:
- case NO_TLS_VALUE_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",
- pointer, start_addr, *start_addr));
- }
- return 0;
-
- /* only pointed to by function pointers? */
- 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 INSTANCE_HEADER_WIDETAG:
- if (gencgc_verbose) {
- FSHOW((stderr,
- "*Wo5: %x %x %x\n",
- pointer, start_addr, *start_addr));
- }
- return 0;
-
- /* the valid other immediate pointer objects */
- 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 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 SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG
- case SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG:
-#endif
-#ifdef SIMPLE_ARRAY_SIGNED_BYTE_61_WIDETAG
- case SIMPLE_ARRAY_SIGNED_BYTE_61_WIDETAG:
-#endif
-#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_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:
-#ifdef LUTEX_WIDETAG
- case LUTEX_WIDETAG:
-#endif
- break;
-
- default:
- if (gencgc_verbose) {
- FSHOW((stderr,
- "/Wo6: %x %x %x\n",
- pointer, start_addr, *start_addr));
- }
- return 0;
- }
- break;
- default:
- if (gencgc_verbose) {
- FSHOW((stderr,
- "*W?: %x %x %x\n",
- pointer, start_addr, *start_addr));
- }
- return 0;
- }
+lispobj *
+search_read_only_space(void *pointer)
+{
+ 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 (gc_search_space(start,
+ (((lispobj *)pointer)+2)-start,
+ (lispobj *) pointer));
+}
- /* looks good */
- return 1;
+lispobj *
+search_static_space(void *pointer)
+{
+ 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 (gc_search_space(start,
+ (((lispobj *)pointer)+2)-start,
+ (lispobj *) pointer));
}
-/* Used by the debugger to validate possibly bogus pointers before
- * calling MAKE-LISP-OBJ on them.
- *
- * FIXME: We would like to make this perfect, because if the debugger
- * constructs a reference to a bugs lisp object, and it ends up in a
- * location scavenged by the GC all hell breaks loose.
- *
- * Whereas possibly_valid_dynamic_space_pointer has to be conservative
- * and return true for all valid pointers, this could actually be eager
- * and lie about a few pointers without bad results... but that should
- * be reflected in the name.
- */
-int
-valid_lisp_pointer_p(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(void *pointer)
{
+ page_index_t page_index = find_page_index(pointer);
lispobj *start;
- if (((start=search_dynamic_space(pointer))!=NULL) ||
- ((start=search_static_space(pointer))!=NULL) ||
- ((start=search_read_only_space(pointer))!=NULL))
- return looks_like_valid_lisp_pointer_p(pointer, start);
- else
- return 0;
+
+ /* The address may be invalid, so do some checks. */
+ if ((page_index == -1) || page_free_p(page_index))
+ return NULL;
+ start = (lispobj *)page_scan_start(page_index);
+ return (gc_search_space(start,
+ (((lispobj *)pointer)+2)-start,
+ (lispobj *)pointer));
}
+#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
+
/* 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?
return looks_like_valid_lisp_pointer_p(pointer, start_addr);
}
+#endif // defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
+
/* Adjust large bignum and vector objects. This will adjust the
* allocated region if the size has shrunk, and move unboxed objects
* into unboxed pages. The pages are not promoted here, and the
{
page_index_t first_page;
page_index_t next_page;
- long nwords;
+ sword_t nwords;
- unsigned long remaining_bytes;
- unsigned long bytes_freed;
- unsigned long old_bytes_used;
+ uword_t remaining_bytes;
+ uword_t bytes_freed;
+ uword_t old_bytes_used;
int boxed;
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_FIXNUM_WIDETAG:
+
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_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
+
+ case SIMPLE_ARRAY_FIXNUM_WIDETAG:
+
#ifdef SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG
case SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG:
#endif
-#ifdef SIMPLE_ARRAY_SIGNED_BYTE_61_WIDETAG
- case SIMPLE_ARRAY_SIGNED_BYTE_61_WIDETAG:
-#endif
#ifdef SIMPLE_ARRAY_SIGNED_BYTE_64_WIDETAG
case SIMPLE_ARRAY_SIGNED_BYTE_64_WIDETAG:
#endif
* but lets do it for them all (they'll probably be written
* anyway?). */
- gc_assert(page_table[first_page].region_start_offset == 0);
+ gc_assert(page_starts_contiguous_block_p(first_page));
next_page = first_page;
remaining_bytes = nwords*N_WORD_BYTES;
- while (remaining_bytes > PAGE_BYTES) {
+ while (remaining_bytes > GENCGC_CARD_BYTES) {
gc_assert(page_table[next_page].gen == from_space);
gc_assert(page_allocated_no_region_p(next_page));
gc_assert(page_table[next_page].large_object);
- gc_assert(page_table[next_page].region_start_offset ==
+ gc_assert(page_table[next_page].scan_start_offset ==
npage_bytes(next_page-first_page));
- gc_assert(page_table[next_page].bytes_used == PAGE_BYTES);
+ gc_assert(page_table[next_page].bytes_used == GENCGC_CARD_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 -= PAGE_BYTES;
+ remaining_bytes -= GENCGC_CARD_BYTES;
next_page++;
}
/* Free any remaining pages; needs care. */
next_page++;
- while ((old_bytes_used == PAGE_BYTES) &&
+ while ((old_bytes_used == GENCGC_CARD_BYTES) &&
(page_table[next_page].gen == from_space) &&
page_allocated_no_region_p(next_page) &&
page_table[next_page].large_object &&
- (page_table[next_page].region_start_offset ==
+ (page_table[next_page].scan_start_offset ==
npage_bytes(next_page - first_page))) {
/* It checks out OK, free the page. We don't need to both zeroing
* pages as this should have been done before shrinking the
/* quick check 2: Check the offset within the page.
*
*/
- if (((unsigned long)addr & (PAGE_BYTES - 1)) >
+ if (((uword_t)addr & (GENCGC_CARD_BYTES - 1)) >
page_table[addr_page_index].bytes_used)
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 interpreted as
- * a pointer which prevents a page from moving. */
+ * a pointer which prevents a page from moving.
+ *
+ * This only needs to happen on x86oids, where this is used for
+ * conservative roots. Non-x86oid systems only ever call this
+ * function on known-valid lisp objects. */
+#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
if (!(code_page_p(addr_page_index)
- || (is_lisp_pointer(addr) &&
+ || (is_lisp_pointer((lispobj)addr) &&
possibly_valid_dynamic_space_pointer(addr))))
return;
+#endif
/* Find the beginning of the region. Note that there may be
* objects in the region preceding the one that we were passed a
#if 0
/* I think this'd work just as well, but without the assertions.
* -dan 2004.01.01 */
- first_page = find_page_index(page_region_start(addr_page_index))
+ first_page = find_page_index(page_scan_start(addr_page_index))
#else
first_page = addr_page_index;
- while (page_table[first_page].region_start_offset != 0) {
+ while (!page_starts_contiguous_block_p(first_page)) {
--first_page;
/* Do some checks. */
- gc_assert(page_table[first_page].bytes_used == PAGE_BYTES);
+ gc_assert(page_table[first_page].bytes_used == GENCGC_CARD_BYTES);
gc_assert(page_table[first_page].gen == from_space);
gc_assert(page_table[first_page].allocated == region_allocation);
}
/* Adjust any large objects before promotion as they won't be
* copied after promotion. */
if (page_table[first_page].large_object) {
- maybe_adjust_large_object(page_address(first_page));
- /* If a large object has shrunk then addr may now point to a
- * 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_free_p(addr_page_index)
- || (page_table[addr_page_index].bytes_used == 0)
- /* Check the offset within the page. */
- || (((unsigned long)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",
- addr));
+ /* Large objects (specifically vectors and bignums) can
+ * shrink, leaving a "tail" of zeroed space, which appears to
+ * the filter above as a seris of valid conses, both car and
+ * cdr of which contain the fixnum zero, but will be
+ * deallocated when the GC shrinks the large object region to
+ * fit the object within. We allow raw pointers within code
+ * space, but for boxed and unboxed space we do not, nor do
+ * pointers to within a non-code object appear valid above. A
+ * cons cell will never merit allocation to a large object
+ * page, so pick them off now, before we try to adjust the
+ * object. */
+ if ((lowtag_of((lispobj)addr) == LIST_POINTER_LOWTAG) &&
+ !code_page_p(first_page)) {
return;
}
+ maybe_adjust_large_object(page_address(first_page));
/* It may have moved to unboxed pages. */
region_allocation = page_table[first_page].allocated;
}
/* Mark the page static. */
page_table[i].dont_move = 1;
- /* Move the page to the new_space. XX I'd rather not do this
- * but the GC logic is not quite able to copy with the static
- * pages remaining in the from space. This also requires the
- * generation bytes_allocated counters be updated. */
- page_table[i].gen = new_space;
- generations[new_space].bytes_allocated += page_table[i].bytes_used;
- generations[from_space].bytes_allocated -= page_table[i].bytes_used;
-
/* It is essential that the pages are not write protected as
* they may have pointers into the old-space which need
* scavenging. They shouldn't be write protected at this
gc_assert(!page_table[i].write_protected);
/* Check whether this is the last page in this contiguous block.. */
- if ((page_table[i].bytes_used < PAGE_BYTES)
- /* ..or it is PAGE_BYTES and is the last in the block */
- || page_free_p(i+1)
- || (page_table[i+1].bytes_used == 0) /* next page free */
- || (page_table[i+1].gen != from_space) /* diff. gen */
- || (page_table[i+1].region_start_offset == 0))
+ if (page_ends_contiguous_block_p(i, from_space))
break;
}
/* Check that the page is now static. */
gc_assert(page_table[addr_page_index].dont_move != 0);
}
-
-#endif // defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
-
\f
/* If the given page is not write-protected, then scan it for pointers
* to younger generations or the top temp. generation, if no
update_page_write_prot(page_index_t page)
{
generation_index_t gen = page_table[page].gen;
- long j;
+ sword_t j;
int wp_it = 1;
void **page_addr = (void **)page_address(page);
- long num_words = page_table[page].bytes_used / N_WORD_BYTES;
+ sword_t num_words = page_table[page].bytes_used / N_WORD_BYTES;
/* Shouldn't be a free page. */
gc_assert(page_allocated_p(page));
/*FSHOW((stderr, "/write-protecting page %d gen %d\n", page, gen));*/
os_protect((void *)page_addr,
- PAGE_BYTES,
+ GENCGC_CARD_BYTES,
OS_VM_PROT_READ|OS_VM_PROT_EXECUTE);
/* Note the page as protected in the page tables. */
scavenge_generations(generation_index_t from, generation_index_t to)
{
page_index_t i;
- int num_wp = 0;
+ page_index_t num_wp = 0;
#define SC_GEN_CK 0
#if SC_GEN_CK
int write_protected=1;
/* This should be the start of a region */
- gc_assert(page_table[i].region_start_offset == 0);
+ gc_assert(page_starts_contiguous_block_p(i));
/* 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_boxed_p(last_page+1))
- || (page_table[last_page+1].bytes_used == 0)
- || (page_table[last_page+1].gen != generation)
- || (page_table[last_page+1].region_start_offset == 0))
+ if (page_ends_contiguous_block_p(last_page, generation))
break;
}
if (!write_protected) {
scavenge(page_address(i),
- ((unsigned long)(page_table[last_page].bytes_used
+ ((uword_t)(page_table[last_page].bytes_used
+ npage_bytes(last_page-i)))
/N_WORD_BYTES);
&& (page_table[i].write_protected_cleared != 0)) {
FSHOW((stderr, "/scavenge_generation() %d\n", generation));
FSHOW((stderr,
- "/page bytes_used=%d region_start_offset=%lu dont_move=%d\n",
+ "/page bytes_used=%d scan_start_offset=%lu dont_move=%d\n",
page_table[i].bytes_used,
- page_table[i].region_start_offset,
+ page_table[i].scan_start_offset,
page_table[i].dont_move));
lose("write to protected page %d in scavenge_generation()\n", i);
}
page_index_t last_page;
int all_wp=1;
- /* The scavenge will start at the region_start_offset of
+ /* The scavenge will start at the scan_start_offset of
* page i.
*
* We need to find the full extent of this contiguous
/* Check whether this is the last page in this
* contiguous block */
- if ((page_table[last_page].bytes_used < PAGE_BYTES)
- /* Or it is PAGE_BYTES and is the last in the block */
- || (!page_boxed_p(last_page+1))
- || (page_table[last_page+1].bytes_used == 0)
- || (page_table[last_page+1].gen != generation)
- || (page_table[last_page+1].region_start_offset == 0))
+ if (page_ends_contiguous_block_p(last_page, generation))
break;
}
/* Do a limited check for write-protected pages. */
if (!all_wp) {
- long nwords = (((unsigned long)
+ sword_t nwords = (((uword_t)
(page_table[last_page].bytes_used
+ npage_bytes(last_page-i)
- + page_table[i].region_start_offset))
+ + page_table[i].scan_start_offset))
/ N_WORD_BYTES);
new_areas_ignore_page = last_page;
- scavenge(page_region_start(i), nwords);
+ scavenge(page_scan_start(i), nwords);
}
i = last_page;
static void
scavenge_newspace_generation(generation_index_t generation)
{
- long i;
+ size_t i;
/* the new_areas array currently being written to by gc_alloc() */
struct new_area (*current_new_areas)[] = &new_areas_1;
- long current_new_areas_index;
+ size_t current_new_areas_index;
/* the new_areas created by the previous scavenge cycle */
struct new_area (*previous_new_areas)[] = NULL;
- long previous_new_areas_index;
+ size_t previous_new_areas_index;
/* Flush the current regions updating the tables. */
gc_alloc_update_all_page_tables();
record_new_objects = 0;
#if SC_NS_GEN_CK
- /* Check that none of the write_protected pages in this generation
- * have been written to. */
- for (i = 0; i < page_table_pages; i++) {
- if (page_allocated_p(i)
- && (page_table[i].bytes_used != 0)
- && (page_table[i].gen == generation)
- && (page_table[i].write_protected_cleared != 0)
- && (page_table[i].dont_move == 0)) {
- lose("write protected page %d written to in scavenge_newspace_generation\ngeneration=%d dont_move=%d\n",
- i, generation, page_table[i].dont_move);
+ {
+ page_index_t i;
+ /* Check that none of the write_protected pages in this generation
+ * have been written to. */
+ for (i = 0; i < page_table_pages; i++) {
+ if (page_allocated_p(i)
+ && (page_table[i].bytes_used != 0)
+ && (page_table[i].gen == generation)
+ && (page_table[i].write_protected_cleared != 0)
+ && (page_table[i].dont_move == 0)) {
+ lose("write protected page %d written to in scavenge_newspace_generation\ngeneration=%d dont_move=%d\n",
+ i, generation, page_table[i].dont_move);
+ }
}
}
#endif
unprotect_oldspace(void)
{
page_index_t i;
+ void *region_addr = 0;
+ void *page_addr = 0;
+ uword_t region_bytes = 0;
for (i = 0; i < last_free_page; i++) {
if (page_allocated_p(i)
&& (page_table[i].bytes_used != 0)
&& (page_table[i].gen == from_space)) {
- void *page_start;
-
- page_start = (void *)page_address(i);
/* 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, PAGE_BYTES, OS_VM_PROT_ALL);
page_table[i].write_protected = 0;
+ page_addr = page_address(i);
+ if (!region_addr) {
+ /* First region. */
+ region_addr = page_addr;
+ region_bytes = GENCGC_CARD_BYTES;
+ } else if (region_addr + region_bytes == page_addr) {
+ /* Region continue. */
+ region_bytes += GENCGC_CARD_BYTES;
+ } else {
+ /* Unprotect previous region. */
+ os_protect(region_addr, region_bytes, OS_VM_PROT_ALL);
+ /* First page in new region. */
+ region_addr = page_addr;
+ region_bytes = GENCGC_CARD_BYTES;
+ }
}
}
}
+ if (region_addr) {
+ /* Unprotect last region. */
+ os_protect(region_addr, region_bytes, OS_VM_PROT_ALL);
+ }
}
/* Work through all the pages and free any in from_space. This
* 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. */
-static unsigned long
+static uword_t
free_oldspace(void)
{
- unsigned long bytes_freed = 0;
+ uword_t bytes_freed = 0;
page_index_t first_page, last_page;
first_page = 0;
page_table[last_page].bytes_used;
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
- * on the write-protect flag to avoid redundant calls. */
- {
- void *page_start = (void *)page_address(last_page);
-
- if (page_table[last_page].write_protected) {
- os_protect(page_start, PAGE_BYTES, OS_VM_PROT_ALL);
- page_table[last_page].write_protected = 0;
- }
- }
+ /* Should already be unprotected by unprotect_oldspace(). */
+ gc_assert(!page_table[last_page].write_protected);
last_page++;
}
while ((last_page < last_free_page)
page_index_t pi1 = find_page_index((void*)addr);
if (pi1 != -1)
- fprintf(stderr," %x: page %d alloc %d gen %d bytes_used %d offset %lu dont_move %d\n",
- (unsigned long) addr,
+ fprintf(stderr," %p: page %d alloc %d gen %d bytes_used %d offset %lu dont_move %d\n",
+ addr,
pi1,
page_table[pi1].allocated,
page_table[pi1].gen,
page_table[pi1].bytes_used,
- page_table[pi1].region_start_offset,
+ page_table[pi1].scan_start_offset,
page_table[pi1].dont_move);
fprintf(stderr," %x %x %x %x (%x) %x %x %x %x\n",
*(addr-4),
}
#endif
+static int
+is_in_stack_space(lispobj ptr)
+{
+ /* For space verification: Pointers can be valid if they point
+ * to a thread stack space. This would be faster if the thread
+ * structures had page-table entries as if they were part of
+ * the heap space. */
+ struct thread *th;
+ for_each_thread(th) {
+ if ((th->control_stack_start <= (lispobj *)ptr) &&
+ (th->control_stack_end >= (lispobj *)ptr)) {
+ return 1;
+ }
+ }
+ return 0;
+}
+
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 long)start &&
- (unsigned long)start < SymbolValue(READ_ONLY_SPACE_FREE_POINTER,0));
+ (READ_ONLY_SPACE_START <= (uword_t)start &&
+ (uword_t)start < SymbolValue(READ_ONLY_SPACE_FREE_POINTER,0));
while (words > 0) {
size_t count = 1;
if (is_lisp_pointer(thing)) {
page_index_t page_index = find_page_index((void*)thing);
- long to_readonly_space =
+ sword_t to_readonly_space =
(READ_ONLY_SPACE_START <= thing &&
thing < SymbolValue(READ_ONLY_SPACE_FREE_POINTER,0));
- long to_static_space =
+ sword_t to_static_space =
(STATIC_SPACE_START <= thing &&
thing < SymbolValue(STATIC_SPACE_FREE_POINTER,0));
* page. XX Could check the offset too. */
if (page_allocated_p(page_index)
&& (page_table[page_index].bytes_used == 0))
- lose ("Ptr %x @ %x sees free page.\n", thing, start);
+ lose ("Ptr %p @ %p sees free page.\n", thing, start);
/* Check that it doesn't point to a forwarding pointer! */
if (*((lispobj *)native_pointer(thing)) == 0x01) {
- lose("Ptr %x @ %x sees forwarding ptr.\n", thing, start);
+ lose("Ptr %p @ %p sees forwarding ptr.\n", thing, start);
}
/* Check that its not in the RO space as it would then be a
* pointer from the RO to the dynamic space. */
if (is_in_readonly_space) {
- lose("ptr to dynamic space %x from RO space %x\n",
+ lose("ptr to dynamic space %p from RO space %x\n",
thing, start);
}
/* Does it point to a plausible object? This check slows
* dynamically. */
/*
if (!possibly_valid_dynamic_space_pointer((lispobj *)thing)) {
- lose("ptr %x to invalid object %x\n", thing, start);
+ lose("ptr %p to invalid object %p\n", thing, start);
}
*/
} else {
+ extern void funcallable_instance_tramp;
/* Verify that it points to another valid space. */
- if (!to_readonly_space && !to_static_space) {
- lose("Ptr %x @ %x sees junk.\n", thing, start);
+ if (!to_readonly_space && !to_static_space
+ && (thing != (lispobj)&funcallable_instance_tramp)
+ && !is_in_stack_space(thing)) {
+ lose("Ptr %p @ %p sees junk.\n", thing, start);
}
}
} else {
case INSTANCE_HEADER_WIDETAG:
{
lispobj nuntagged;
- long ntotal = HeaderValue(thing);
+ sword_t ntotal = HeaderValue(thing);
lispobj layout = ((struct instance *)start)->slots[0];
if (!layout) {
count = 1;
{
lispobj object = *start;
struct code *code;
- long nheader_words, ncode_words, nwords;
+ sword_t nheader_words, ncode_words, nwords;
lispobj fheaderl;
struct simple_fun *fheaderp;
/* Only when enabled */
&& verify_dynamic_code_check) {
FSHOW((stderr,
- "/code object at %x in the dynamic space\n",
+ "/code object at %p in the dynamic space\n",
start));
}
#ifdef COMPLEX_LONG_FLOAT_WIDETAG
case COMPLEX_LONG_FLOAT_WIDETAG:
#endif
+#ifdef SIMD_PACK_WIDETAG
+ case SIMD_PACK_WIDETAG:
+#endif
case SIMPLE_BASE_STRING_WIDETAG:
#ifdef SIMPLE_CHARACTER_STRING_WIDETAG
case SIMPLE_CHARACTER_STRING_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_FIXNUM_WIDETAG:
+
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_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
+
+ case SIMPLE_ARRAY_FIXNUM_WIDETAG:
+
#ifdef SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG
case SIMPLE_ARRAY_SIGNED_BYTE_32_WIDETAG:
#endif
-#ifdef SIMPLE_ARRAY_SIGNED_BYTE_61_WIDETAG
- case SIMPLE_ARRAY_SIGNED_BYTE_61_WIDETAG:
-#endif
#ifdef SIMPLE_ARRAY_SIGNED_BYTE_64_WIDETAG
case SIMPLE_ARRAY_SIGNED_BYTE_64_WIDETAG:
#endif
#endif
case SAP_WIDETAG:
case WEAK_POINTER_WIDETAG:
-#ifdef LUTEX_WIDETAG
- case LUTEX_WIDETAG:
-#endif
#ifdef NO_TLS_VALUE_MARKER_WIDETAG
case NO_TLS_VALUE_MARKER_WIDETAG:
#endif
break;
default:
- lose("Unhandled widetag 0x%x at 0x%x\n",
+ lose("Unhandled widetag %p at %p\n",
widetag_of(*start), start);
}
}
* 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. */
- long read_only_space_size =
+ sword_t read_only_space_size =
(lispobj*)SymbolValue(READ_ONLY_SPACE_FREE_POINTER,0)
- (lispobj*)READ_ONLY_SPACE_START;
- long static_space_size =
+ sword_t static_space_size =
(lispobj*)SymbolValue(STATIC_SPACE_FREE_POINTER,0)
- (lispobj*)STATIC_SPACE_START;
struct thread *th;
for_each_thread(th) {
- long binding_stack_size =
+ sword_t binding_stack_size =
(lispobj*)get_binding_stack_pointer(th)
- (lispobj*)th->binding_stack_start;
verify_space(th->binding_stack_start, binding_stack_size);
&& (page_table[i].bytes_used != 0)
&& (page_table[i].gen == generation)) {
page_index_t last_page;
- int region_allocation = page_table[i].allocated;
/* This should be the start of a contiguous block */
- gc_assert(page_table[i].region_start_offset == 0);
+ gc_assert(page_starts_contiguous_block_p(i));
/* Need to find the full extent of this contiguous block in case
objects span pages. */
for (last_page = i; ;last_page++)
/* Check whether this is the last page in this contiguous
* 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)
- || (page_table[last_page+1].region_start_offset == 0))
+ if (page_ends_contiguous_block_p(last_page, generation))
break;
verify_space(page_address(i),
- ((unsigned long)
+ ((uword_t)
(page_table[last_page].bytes_used
+ npage_bytes(last_page-i)))
/ N_WORD_BYTES);
for (page = 0; page < last_free_page; page++) {
if (page_free_p(page)) {
/* The whole page should be zero filled. */
- long *start_addr = (long *)page_address(page);
- long size = 1024;
- long i;
+ sword_t *start_addr = (sword_t *)page_address(page);
+ sword_t size = 1024;
+ sword_t i;
for (i = 0; i < size; i++) {
if (start_addr[i] != 0) {
lose("free page not zero at %x\n", start_addr + i);
}
}
} else {
- long free_bytes = PAGE_BYTES - page_table[page].bytes_used;
+ sword_t free_bytes = GENCGC_CARD_BYTES - page_table[page].bytes_used;
if (free_bytes > 0) {
- long *start_addr = (long *)((unsigned long)page_address(page)
+ sword_t *start_addr = (sword_t *)((uword_t)page_address(page)
+ page_table[page].bytes_used);
- long size = free_bytes / N_WORD_BYTES;
- long i;
+ sword_t size = free_bytes / N_WORD_BYTES;
+ sword_t i;
for (i = 0; i < size; i++) {
if (start_addr[i] != 0) {
lose("free region not zero at %x\n", start_addr + i);
}
}
-#if !defined(LISP_FEATURE_X86) && !defined(LISP_FEATURE_X86_64)
-
-static void
-scavenge_control_stack()
-{
- unsigned long control_stack_size;
-
- /* This is going to be a big problem when we try to port threads
- * to PPC... CLH */
- struct thread *th = arch_os_get_current_thread();
- lispobj *control_stack =
- (lispobj *)(th->control_stack_start);
-
- control_stack_size = current_control_stack_pointer - control_stack;
- scavenge(control_stack, control_stack_size);
-}
-
-/* Scavenging Interrupt Contexts */
-
-static int boxed_registers[] = BOXED_REGISTERS;
-
-static void
-scavenge_interrupt_context(os_context_t * context)
-{
- int i;
-
-#ifdef reg_LIP
- unsigned long lip;
- unsigned long lip_offset;
- int lip_register_pair;
-#endif
- unsigned long pc_code_offset;
-
-#ifdef ARCH_HAS_LINK_REGISTER
- unsigned long lr_code_offset;
-#endif
-#ifdef ARCH_HAS_NPC_REGISTER
- unsigned long npc_code_offset;
-#endif
-
-#ifdef reg_LIP
- /* Find the LIP's register pair and calculate it's offset */
- /* before we scavenge the context. */
-
- /*
- * I (RLT) think this is trying to find the boxed register that is
- * closest to the LIP address, without going past it. Usually, it's
- * reg_CODE or reg_LRA. But sometimes, nothing can be found.
- */
- lip = *os_context_register_addr(context, reg_LIP);
- lip_offset = 0x7FFFFFFF;
- lip_register_pair = -1;
- for (i = 0; i < (sizeof(boxed_registers) / sizeof(int)); i++) {
- unsigned long reg;
- long offset;
- int index;
-
- index = boxed_registers[i];
- reg = *os_context_register_addr(context, index);
- if ((reg & ~((1L<<N_LOWTAG_BITS)-1)) <= lip) {
- offset = lip - reg;
- if (offset < lip_offset) {
- lip_offset = offset;
- lip_register_pair = index;
- }
- }
- }
-#endif /* reg_LIP */
-
- /* Compute the PC's offset from the start of the CODE */
- /* register. */
- pc_code_offset = *os_context_pc_addr(context)
- - *os_context_register_addr(context, reg_CODE);
-#ifdef ARCH_HAS_NPC_REGISTER
- npc_code_offset = *os_context_npc_addr(context)
- - *os_context_register_addr(context, reg_CODE);
-#endif /* ARCH_HAS_NPC_REGISTER */
-
-#ifdef ARCH_HAS_LINK_REGISTER
- lr_code_offset =
- *os_context_lr_addr(context) -
- *os_context_register_addr(context, reg_CODE);
-#endif
-
- /* Scanvenge all boxed registers in the context. */
- for (i = 0; i < (sizeof(boxed_registers) / sizeof(int)); i++) {
- int index;
- lispobj foo;
-
- index = boxed_registers[i];
- foo = *os_context_register_addr(context, index);
- scavenge(&foo, 1);
- *os_context_register_addr(context, index) = foo;
-
- scavenge((lispobj*) &(*os_context_register_addr(context, index)), 1);
- }
-
-#ifdef reg_LIP
- /* Fix the LIP */
-
- /*
- * But what happens if lip_register_pair is -1?
- * *os_context_register_addr on Solaris (see
- * solaris_register_address in solaris-os.c) will return
- * &context->uc_mcontext.gregs[2]. But gregs[2] is REG_nPC. Is
- * that what we really want? My guess is that that is not what we
- * want, so if lip_register_pair is -1, we don't touch reg_LIP at
- * all. But maybe it doesn't really matter if LIP is trashed?
- */
- if (lip_register_pair >= 0) {
- *os_context_register_addr(context, reg_LIP) =
- *os_context_register_addr(context, lip_register_pair)
- + lip_offset;
- }
-#endif /* reg_LIP */
-
- /* Fix the PC if it was in from space */
- if (from_space_p(*os_context_pc_addr(context)))
- *os_context_pc_addr(context) =
- *os_context_register_addr(context, reg_CODE) + pc_code_offset;
-
-#ifdef ARCH_HAS_LINK_REGISTER
- /* Fix the LR ditto; important if we're being called from
- * an assembly routine that expects to return using blr, otherwise
- * harmless */
- if (from_space_p(*os_context_lr_addr(context)))
- *os_context_lr_addr(context) =
- *os_context_register_addr(context, reg_CODE) + lr_code_offset;
-#endif
-
-#ifdef ARCH_HAS_NPC_REGISTER
- if (from_space_p(*os_context_npc_addr(context)))
- *os_context_npc_addr(context) =
- *os_context_register_addr(context, reg_CODE) + npc_code_offset;
-#endif /* ARCH_HAS_NPC_REGISTER */
-}
-
-void
-scavenge_interrupt_contexts(void)
-{
- int i, index;
- os_context_t *context;
-
- struct thread *th=arch_os_get_current_thread();
-
- index = fixnum_value(SymbolValue(FREE_INTERRUPT_CONTEXT_INDEX,0));
-
-#if defined(DEBUG_PRINT_CONTEXT_INDEX)
- printf("Number of active contexts: %d\n", index);
-#endif
-
- for (i = 0; i < index; i++) {
- context = th->interrupt_contexts[i];
- scavenge_interrupt_context(context);
- }
-}
-
-#endif
-
-#if defined(LISP_FEATURE_SB_THREAD)
+#if defined(LISP_FEATURE_SB_THREAD) && (defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64))
static void
preserve_context_registers (os_context_t *c)
{
/* On Darwin the signal context isn't a contiguous block of memory,
* so just preserve_pointering its contents won't be sufficient.
*/
-#if defined(LISP_FEATURE_DARWIN)
+#if defined(LISP_FEATURE_DARWIN)||defined(LISP_FEATURE_WIN32)
#if defined LISP_FEATURE_X86
preserve_pointer((void*)*os_context_register_addr(c,reg_EAX));
preserve_pointer((void*)*os_context_register_addr(c,reg_ECX));
#error "preserve_context_registers needs to be tweaked for non-x86 Darwin"
#endif
#endif
+#if !defined(LISP_FEATURE_WIN32)
for(ptr = ((void **)(c+1))-1; ptr>=(void **)c; ptr--) {
preserve_pointer(*ptr);
}
+#endif
}
#endif
+static void
+move_pinned_pages_to_newspace()
+{
+ page_index_t i;
+
+ /* scavenge() will evacuate all oldspace pages, but no newspace
+ * pages. Pinned pages are precisely those pages which must not
+ * be evacuated, so move them to newspace directly. */
+
+ for (i = 0; i < last_free_page; i++) {
+ if (page_table[i].dont_move &&
+ /* dont_move is cleared lazily, so validate the space as well. */
+ page_table[i].gen == from_space) {
+ page_table[i].gen = new_space;
+ /* And since we're moving the pages wholesale, also adjust
+ * the generation allocation counters. */
+ generations[new_space].bytes_allocated += page_table[i].bytes_used;
+ generations[from_space].bytes_allocated -= page_table[i].bytes_used;
+ }
+ }
+}
+
/* Garbage collect a generation. If raise is 0 then the remains of the
* generation are not raised to the next generation. */
static void
garbage_collect_generation(generation_index_t generation, int raise)
{
- unsigned long bytes_freed;
+ uword_t bytes_freed;
page_index_t i;
- unsigned long static_space_size;
-#if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
+ uword_t static_space_size;
struct thread *th;
-#endif
+
gc_assert(generation <= HIGHEST_NORMAL_GENERATION);
/* The oldest generation can't be raised. */
/* Initialize the weak pointer list. */
weak_pointers = NULL;
-#ifdef LUTEX_WIDETAG
- unmark_lutexes(generation);
-#endif
-
/* When a generation is not being raised it is transported to a
* temporary generation (NUM_GENERATIONS), and lowered when
* done. Set up this new generation. There should be no pages
for_each_thread(th) {
void **ptr;
void **esp=(void **)-1;
-#ifdef LISP_FEATURE_SB_THREAD
- long i,free;
+ if (th->state == STATE_DEAD)
+ continue;
+# if defined(LISP_FEATURE_SB_SAFEPOINT)
+ /* Conservative collect_garbage is always invoked with a
+ * foreign C call or an interrupt handler on top of every
+ * existing thread, so the stored SP in each thread
+ * structure is valid, no matter which thread we are looking
+ * at. For threads that were running Lisp code, the pitstop
+ * and edge functions maintain this value within the
+ * interrupt or exception handler. */
+ esp = os_get_csp(th);
+ assert_on_stack(th, esp);
+
+ /* In addition to pointers on the stack, also preserve the
+ * return PC, the only value from the context that we need
+ * in addition to the SP. The return PC gets saved by the
+ * foreign call wrapper, and removed from the control stack
+ * into a register. */
+ preserve_pointer(th->pc_around_foreign_call);
+
+ /* And on platforms with interrupts: scavenge ctx registers. */
+
+ /* Disabled on Windows, because it does not have an explicit
+ * stack of `interrupt_contexts'. The reported CSP has been
+ * chosen so that the current context on the stack is
+ * covered by the stack scan. See also set_csp_from_context(). */
+# ifndef LISP_FEATURE_WIN32
+ if (th != arch_os_get_current_thread()) {
+ long k = fixnum_value(
+ SymbolValue(FREE_INTERRUPT_CONTEXT_INDEX,th));
+ while (k > 0)
+ preserve_context_registers(th->interrupt_contexts[--k]);
+ }
+# endif
+# elif defined(LISP_FEATURE_SB_THREAD)
+ sword_t i,free;
if(th==arch_os_get_current_thread()) {
/* Somebody is going to burn in hell for this, but casting
* it in two steps shuts gcc up about strict aliasing. */
}
}
}
-#else
+# else
esp = (void **)((void *)&raise);
-#endif
+# endif
+ if (!esp || esp == (void*) -1)
+ lose("garbage_collect: no SP known for thread %x (OS %x)",
+ th, th->os_thread);
for (ptr = ((void **)th->control_stack_end)-1; ptr >= esp; ptr--) {
preserve_pointer(*ptr);
}
}
}
+#else
+ /* Non-x86oid systems don't have "conservative roots" as such, but
+ * the same mechanism is used for objects pinned for use by alien
+ * code. */
+ for_each_thread(th) {
+ lispobj pin_list = SymbolTlValue(PINNED_OBJECTS,th);
+ while (pin_list != NIL) {
+ struct cons *list_entry =
+ (struct cons *)native_pointer(pin_list);
+ preserve_pointer(list_entry->car);
+ pin_list = list_entry->cdr;
+ }
+ }
#endif
-#ifdef QSHOW
+#if QSHOW
if (gencgc_verbose > 1) {
- long num_dont_move_pages = count_dont_move_pages();
+ sword_t 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,
- npage_bytes(num_dont_move_pages);
+ npage_bytes(num_dont_move_pages));
}
#endif
+ /* Now that all of the pinned (dont_move) pages are known, and
+ * before we start to scavenge (and thus relocate) objects,
+ * relocate the pinned pages to newspace, so that the scavenger
+ * will not attempt to relocate their contents. */
+ move_pinned_pages_to_newspace();
+
/* Scavenge all the rest of the roots. */
#if !defined(LISP_FEATURE_X86) && !defined(LISP_FEATURE_X86_64)
* If not x86, we need to scavenge the interrupt context(s) and the
* control stack.
*/
- scavenge_interrupt_contexts();
- scavenge_control_stack();
+ {
+ struct thread *th;
+ for_each_thread(th) {
+ scavenge_interrupt_contexts(th);
+ scavenge_control_stack(th);
+ }
+
+# ifdef LISP_FEATURE_SB_SAFEPOINT
+ /* In this case, scrub all stacks right here from the GCing thread
+ * instead of doing what the comment below says. Suboptimal, but
+ * easier. */
+ for_each_thread(th)
+ scrub_thread_control_stack(th);
+# else
+ /* Scrub the unscavenged control stack space, so that we can't run
+ * into any stale pointers in a later GC (this is done by the
+ * stop-for-gc handler in the other threads). */
+ scrub_control_stack();
+# endif
+ }
#endif
/* Scavenge the Lisp functions of the interrupt handlers, taking
{
struct thread *th;
for_each_thread(th) {
- long len= (lispobj *)get_binding_stack_pointer(th) -
+ sword_t len= (lispobj *)get_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)) -
+ len=(SymbolValue(FREE_TLS_INDEX,0) >> WORD_SHIFT) -
(sizeof (struct thread))/(sizeof (lispobj));
scavenge((lispobj *) (th+1),len);
#endif
* please submit a patch. */
#if 0
if (SymbolValue(SCAVENGE_READ_ONLY_SPACE) != NIL) {
- unsigned long read_only_space_size =
+ uword_t read_only_space_size =
(lispobj*)SymbolValue(READ_ONLY_SPACE_FREE_POINTER) -
(lispobj*)READ_ONLY_SPACE_START;
FSHOW((stderr,
/* As a check re-scavenge the newspace once; no new objects should
* be found. */
{
- long old_bytes_allocated = bytes_allocated;
- long bytes_allocated;
+ os_vm_size_t old_bytes_allocated = bytes_allocated;
+ os_vm_size_t bytes_allocated;
/* Start with a full scavenge. */
scavenge_newspace_generation_one_scan(new_space);
else
++generations[generation].num_gc;
-#ifdef LUTEX_WIDETAG
- reap_lutexes(generation);
- if (raise)
- move_lutexes(generation, generation+1);
-#endif
}
/* Update last_free_page, then SymbolValue(ALLOCATION_POINTER). */
-long
+sword_t
update_dynamic_space_free_pointer(void)
{
page_index_t last_page = -1, i;
}
static void
-remap_free_pages (page_index_t from, page_index_t to)
+remap_page_range (page_index_t from, page_index_t to)
+{
+ /* There's a mysterious Solaris/x86 problem with using mmap
+ * tricks for memory zeroing. See sbcl-devel thread
+ * "Re: patch: standalone executable redux".
+ */
+#if defined(LISP_FEATURE_SUNOS)
+ zero_and_mark_pages(from, to);
+#else
+ const page_index_t
+ release_granularity = gencgc_release_granularity/GENCGC_CARD_BYTES,
+ release_mask = release_granularity-1,
+ end = to+1,
+ aligned_from = (from+release_mask)&~release_mask,
+ aligned_end = (end&~release_mask);
+
+ if (aligned_from < aligned_end) {
+ zero_pages_with_mmap(aligned_from, aligned_end-1);
+ if (aligned_from != from)
+ zero_and_mark_pages(from, aligned_from-1);
+ if (aligned_end != end)
+ zero_and_mark_pages(aligned_end, end-1);
+ } else {
+ zero_and_mark_pages(from, to);
+ }
+#endif
+}
+
+static void
+remap_free_pages (page_index_t from, page_index_t to, int forcibly)
{
page_index_t first_page, last_page;
+ if (forcibly)
+ return remap_page_range(from, to);
+
for (first_page = from; first_page <= to; first_page++) {
if (page_allocated_p(first_page) ||
- (page_table[first_page].need_to_zero == 0)) {
+ (page_table[first_page].need_to_zero == 0))
continue;
- }
last_page = first_page + 1;
while (page_free_p(last_page) &&
- (last_page < to) &&
- (page_table[last_page].need_to_zero == 1)) {
+ (last_page <= to) &&
+ (page_table[last_page].need_to_zero == 1))
last_page++;
- }
- /* There's a mysterious Solaris/x86 problem with using mmap
- * tricks for memory zeroing. See sbcl-devel thread
- * "Re: patch: standalone executable redux".
- */
-#if defined(LISP_FEATURE_SUNOS)
- zero_pages(first_page, last_page-1);
-#else
- zero_pages_with_mmap(first_page, last_page-1);
-#endif
+ remap_page_range(first_page, last_page-1);
first_page = last_page;
}
collect_garbage(generation_index_t last_gen)
{
generation_index_t gen = 0, i;
- int raise;
+ int raise, more = 0;
int gen_to_wp;
/* The largest value of last_free_page seen since the time
* remap_free_pages was called. */
static page_index_t high_water_mark = 0;
FSHOW((stderr, "/entering collect_garbage(%d)\n", last_gen));
+ log_generation_stats(gc_logfile, "=== GC Start ===");
gc_active_p = 1;
}
if (gencgc_verbose > 1)
- print_generation_stats(0);
+ print_generation_stats();
do {
/* Collect the generation. */
- if (gen >= gencgc_oldest_gen_to_gc) {
- /* Never raise the oldest generation. */
+ if (more || (gen >= gencgc_oldest_gen_to_gc)) {
+ /* Never raise the oldest generation. Never raise the extra generation
+ * collected due to more-flag. */
raise = 0;
+ more = 0;
} else {
raise =
(gen < last_gen)
- || (generations[gen].num_gc >= generations[gen].trigger_age);
+ || (generations[gen].num_gc >= generations[gen].number_of_gcs_before_promotion);
+ /* If we would not normally raise this one, but we're
+ * running low on space in comparison to the object-sizes
+ * we've been seeing, raise it and collect the next one
+ * too. */
+ if (!raise && gen == last_gen) {
+ more = (2*large_allocation) >= (dynamic_space_size - bytes_allocated);
+ raise = more;
+ }
}
if (gencgc_verbose > 1) {
if (gencgc_verbose > 1) {
FSHOW((stderr, "GC of generation %d finished:\n", gen));
- print_generation_stats(0);
+ print_generation_stats();
}
gen++;
} while ((gen <= gencgc_oldest_gen_to_gc)
&& ((gen < last_gen)
- || ((gen <= gencgc_oldest_gen_to_gc)
- && raise
+ || more
+ || (raise
&& (generations[gen].bytes_allocated
> generations[gen].gc_trigger)
- && (gen_av_mem_age(gen)
- > generations[gen].min_av_mem_age))));
+ && (generation_average_age(gen)
+ > generations[gen].minimum_age_before_gc))));
/* Now if gen-1 was raised all generations before gen are empty.
* If it wasn't raised then all generations before gen-1 are empty.
update_dynamic_space_free_pointer();
- auto_gc_trigger = bytes_allocated + bytes_consed_between_gcs;
+ /* Update auto_gc_trigger. Make sure we trigger the next GC before
+ * running out of heap! */
+ if (bytes_consed_between_gcs <= (dynamic_space_size - bytes_allocated))
+ auto_gc_trigger = bytes_allocated + bytes_consed_between_gcs;
+ else
+ auto_gc_trigger = bytes_allocated + (dynamic_space_size - bytes_allocated)/2;
+
if(gencgc_verbose)
- fprintf(stderr,"Next gc when %ld bytes have been consed\n",
+ fprintf(stderr,"Next gc when %"OS_VM_SIZE_FMT" bytes have been consed\n",
auto_gc_trigger);
/* If we did a big GC (arbitrarily defined as gen > 1), release memory
if (gen > small_generation_limit) {
if (last_free_page > high_water_mark)
high_water_mark = last_free_page;
- remap_free_pages(0, high_water_mark);
+ remap_free_pages(0, high_water_mark, 0);
high_water_mark = 0;
}
gc_active_p = 0;
+ large_allocation = 0;
+ log_generation_stats(gc_logfile, "=== GC End ===");
SHOW("returning from collect_garbage");
}
void
gc_free_heap(void)
{
- page_index_t page;
+ page_index_t page, last_page;
if (gencgc_verbose > 1) {
SHOW("entering gc_free_heap");
for (page = 0; page < page_table_pages; page++) {
/* Skip free pages which should already be zero filled. */
if (page_allocated_p(page)) {
- void *page_start, *addr;
-
- /* Mark the page free. The other slots are assumed invalid
- * 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_FLAG;
- page_table[page].bytes_used = 0;
+ void *page_start;
+ for (last_page = page;
+ (last_page < page_table_pages) && page_allocated_p(last_page);
+ last_page++) {
+ /* Mark the page free. The other slots are assumed invalid
+ * 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_FLAG;
+ page_table[page].bytes_used = 0;
+ page_table[page].write_protected = 0;
+ }
#ifndef LISP_FEATURE_WIN32 /* Pages already zeroed on win32? Not sure
* about this change. */
- /* Zero the page. */
page_start = (void *)page_address(page);
-
- /* First, remove any write-protection. */
- os_protect(page_start, PAGE_BYTES, OS_VM_PROT_ALL);
- page_table[page].write_protected = 0;
-
- 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\n",
- page_start,
- addr);
- }
-#else
- page_table[page].write_protected = 0;
+ os_protect(page_start, npage_bytes(last_page-page), OS_VM_PROT_ALL);
+ remap_free_pages(page, last_page-1, 1);
+ page = last_page-1;
#endif
} else if (gencgc_zero_check_during_free_heap) {
/* Double-check that the page is zero filled. */
- long *page_start;
+ sword_t *page_start;
page_index_t i;
gc_assert(page_free_p(page));
gc_assert(page_table[page].bytes_used == 0);
- page_start = (long *)page_address(page);
- for (i=0; i<1024; i++) {
+ page_start = (sword_t *)page_address(page);
+ for (i=0; i<GENCGC_CARD_BYTES/sizeof(sword_t); i++) {
if (page_start[i] != 0) {
lose("free region not zero at %x\n", page_start + i);
}
generations[page].gc_trigger = 2000000;
generations[page].num_gc = 0;
generations[page].cum_sum_bytes_allocated = 0;
- generations[page].lutexes = NULL;
}
if (gencgc_verbose > 1)
- print_generation_stats(0);
+ print_generation_stats();
/* Initialize gc_alloc(). */
gc_alloc_generation = 0;
{
page_index_t i;
+#if defined(LISP_FEATURE_SB_SAFEPOINT)
+ alloc_gc_page();
+#endif
+
/* Compute the number of pages needed for the dynamic space.
* Dynamic space size should be aligned on page size. */
- page_table_pages = dynamic_space_size/PAGE_BYTES;
+ page_table_pages = dynamic_space_size/GENCGC_CARD_BYTES;
gc_assert(dynamic_space_size == npage_bytes(page_table_pages));
+ /* Default nursery size to 5% of the total dynamic space size,
+ * min 1Mb. */
+ bytes_consed_between_gcs = dynamic_space_size/(os_vm_size_t)20;
+ if (bytes_consed_between_gcs < (1024*1024))
+ bytes_consed_between_gcs = 1024*1024;
+
+ /* The page_table must be allocated using "calloc" to initialize
+ * the page structures correctly. There used to be a separate
+ * initialization loop (now commented out; see below) but that was
+ * unnecessary and did hurt startup time. */
page_table = calloc(page_table_pages, sizeof(struct page));
gc_assert(page_table);
scavtab[WEAK_POINTER_WIDETAG] = scav_weak_pointer;
transother[SIMPLE_ARRAY_WIDETAG] = trans_boxed_large;
-#ifdef LUTEX_WIDETAG
- scavtab[LUTEX_WIDETAG] = scav_lutex;
- transother[LUTEX_WIDETAG] = trans_lutex;
- sizetab[LUTEX_WIDETAG] = size_lutex;
-#endif
-
heap_base = (void*)DYNAMIC_SPACE_START;
- /* Initialize each page structure. */
- for (i = 0; i < page_table_pages; i++) {
- /* Initialize all pages as free. */
- page_table[i].allocated = FREE_PAGE_FLAG;
- page_table[i].bytes_used = 0;
-
- /* Pages are not write-protected at startup. */
- page_table[i].write_protected = 0;
+ /* The page structures are initialized implicitly when page_table
+ * is allocated with "calloc" above. Formerly we had the following
+ * explicit initialization here (comments converted to C99 style
+ * for readability as C's block comments don't nest):
+ *
+ * // Initialize each page structure.
+ * for (i = 0; i < page_table_pages; i++) {
+ * // Initialize all pages as free.
+ * page_table[i].allocated = FREE_PAGE_FLAG;
+ * page_table[i].bytes_used = 0;
+ *
+ * // Pages are not write-protected at startup.
+ * page_table[i].write_protected = 0;
+ * }
+ *
+ * Without this loop the image starts up much faster when dynamic
+ * space is large -- which it is on 64-bit platforms already by
+ * default -- and when "calloc" for large arrays is implemented
+ * using copy-on-write of a page of zeroes -- which it is at least
+ * on Linux. In this case the pages that page_table_pages is stored
+ * in are mapped and cleared not before the corresponding part of
+ * dynamic space is used. For example, this saves clearing 16 MB of
+ * memory at startup if the page size is 4 KB and the size of
+ * dynamic space is 4 GB.
+ * FREE_PAGE_FLAG must be 0 for this to work correctly which is
+ * asserted below: */
+ {
+ /* Compile time assertion: If triggered, declares an array
+ * of dimension -1 forcing a syntax error. The intent of the
+ * assignment is to avoid an "unused variable" warning. */
+ char assert_free_page_flag_0[(FREE_PAGE_FLAG) ? -1 : 1];
+ assert_free_page_flag_0[0] = assert_free_page_flag_0[0];
}
bytes_allocated = 0;
generations[i].num_gc = 0;
generations[i].cum_sum_bytes_allocated = 0;
/* the tune-able parameters */
- generations[i].bytes_consed_between_gc = 2000000;
- generations[i].trigger_age = 1;
- generations[i].min_av_mem_age = 0.75;
- generations[i].lutexes = NULL;
+ generations[i].bytes_consed_between_gc
+ = bytes_consed_between_gcs/(os_vm_size_t)HIGHEST_NORMAL_GENERATION;
+ generations[i].number_of_gcs_before_promotion = 1;
+ generations[i].minimum_age_before_gc = 0.75;
}
/* Initialize gc_alloc. */
void *alloc_ptr = (void *)get_alloc_pointer();
lispobj *prev=(lispobj *)page_address(page);
generation_index_t gen = PSEUDO_STATIC_GENERATION;
+
+ bytes_allocated = 0;
+
do {
lispobj *first,*ptr= (lispobj *)page_address(page);
- page_table[page].allocated = BOXED_PAGE_FLAG;
- page_table[page].gen = gen;
- page_table[page].bytes_used = PAGE_BYTES;
- page_table[page].large_object = 0;
- page_table[page].write_protected = 0;
- page_table[page].write_protected_cleared = 0;
- page_table[page].dont_move = 0;
- page_table[page].need_to_zero = 1;
+
+ if (!gencgc_partial_pickup || page_allocated_p(page)) {
+ /* It is possible, though rare, for the saved page table
+ * to contain free pages below alloc_ptr. */
+ page_table[page].gen = gen;
+ page_table[page].bytes_used = GENCGC_CARD_BYTES;
+ page_table[page].large_object = 0;
+ page_table[page].write_protected = 0;
+ page_table[page].write_protected_cleared = 0;
+ page_table[page].dont_move = 0;
+ page_table[page].need_to_zero = 1;
+
+ bytes_allocated += GENCGC_CARD_BYTES;
+ }
if (!gencgc_partial_pickup) {
+ page_table[page].allocated = BOXED_PAGE_FLAG;
first=gc_search_space(prev,(ptr+2)-prev,ptr);
- if(ptr == first) prev=ptr;
- page_table[page].region_start_offset =
+ if(ptr == first)
+ prev=ptr;
+ page_table[page].scan_start_offset =
page_address(page) - (void *)prev;
}
page++;
} while (page_address(page) < alloc_ptr);
-#ifdef LUTEX_WIDETAG
- /* Lutexes have been registered in generation 0 by coreparse, and
- * need to be moved to the right one manually.
- */
- move_lutexes(0, PSEUDO_STATIC_GENERATION);
-#endif
-
last_free_page = page;
- generations[gen].bytes_allocated = npage_bytes(page);
- bytes_allocated = npage_bytes(page);
+ generations[gen].bytes_allocated = bytes_allocated;
gc_alloc_update_all_page_tables();
write_protect_generation_pages(gen);
* region is full, so in most cases it's not needed. */
static inline lispobj *
-general_alloc_internal(long nbytes, int page_type_flag, struct alloc_region *region,
+general_alloc_internal(sword_t nbytes, int page_type_flag, struct alloc_region *region,
struct thread *thread)
{
#ifndef LISP_FEATURE_WIN32
#endif
void *new_obj;
void *new_free_pointer;
+ os_vm_size_t trigger_bytes = 0;
gc_assert(nbytes>0);
/* Check for alignment allocation problems. */
- gc_assert((((unsigned long)region->free_pointer & LOWTAG_MASK) == 0)
+ gc_assert((((uword_t)region->free_pointer & LOWTAG_MASK) == 0)
&& ((nbytes & LOWTAG_MASK) == 0));
+#if !(defined(LISP_FEATURE_WIN32) && defined(LISP_FEATURE_SB_THREAD))
/* Must be inside a PA section. */
gc_assert(get_pseudo_atomic_atomic(thread));
+#endif
+
+ if (nbytes > large_allocation)
+ large_allocation = nbytes;
/* maybe we can do this quickly ... */
new_free_pointer = region->free_pointer + nbytes;
return(new_obj); /* yup */
}
+ /* We don't want to count nbytes against auto_gc_trigger unless we
+ * have to: it speeds up the tenuring of objects and slows down
+ * allocation. However, unless we do so when allocating _very_
+ * large objects we are in danger of exhausting the heap without
+ * running sufficient GCs.
+ */
+ if (nbytes >= bytes_consed_between_gcs)
+ trigger_bytes = nbytes;
+
/* 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) {
+ if (auto_gc_trigger && (bytes_allocated+trigger_bytes > auto_gc_trigger)) {
/* 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. */
/* set things up so that GC happens when we finish the PA
* section */
SetSymbolValue(GC_PENDING,T,thread);
- if (SymbolValue(GC_INHIBIT,thread) == NIL)
- set_pseudo_atomic_interrupted(thread);
+ if (SymbolValue(GC_INHIBIT,thread) == NIL) {
+#ifdef LISP_FEATURE_SB_SAFEPOINT
+ thread_register_gc_trigger();
+#else
+ set_pseudo_atomic_interrupted(thread);
+#ifdef GENCGC_IS_PRECISE
+ /* PPC calls alloc() from a trap or from pa_alloc(),
+ * look up the most context if it's from a trap. */
+ {
+ os_context_t *context =
+ thread->interrupt_data->allocation_trap_context;
+ maybe_save_gc_mask_and_block_deferrables
+ (context ? os_context_sigmask_addr(context) : NULL);
+ }
+#else
+ maybe_save_gc_mask_and_block_deferrables(NULL);
+#endif
+#endif
+ }
}
}
new_obj = gc_alloc_with_region(nbytes, page_type_flag, region, 0);
#ifndef LISP_FEATURE_WIN32
+ /* for sb-prof, and not supported on Windows yet */
alloc_signal = SymbolValue(ALLOC_SIGNAL,thread);
if ((alloc_signal & FIXNUM_TAG_MASK) == 0) {
- if ((signed long) alloc_signal <= 0) {
+ if ((sword_t) alloc_signal <= 0) {
SetSymbolValue(ALLOC_SIGNAL, T, thread);
- thread_kill(thread->os_thread, SIGPROF);
+ raise(SIGPROF);
} else {
SetSymbolValue(ALLOC_SIGNAL,
alloc_signal - (1 << N_FIXNUM_TAG_BITS),
}
lispobj *
-general_alloc(long nbytes, int page_type_flag)
+general_alloc(sword_t nbytes, int page_type_flag)
{
struct thread *thread = arch_os_get_current_thread();
/* Select correct region, and call general_alloc_internal with it.
}
}
-lispobj *
+lispobj AMD64_SYSV_ABI *
alloc(long nbytes)
{
- return general_alloc(nbytes, BOXED_PAGE_FLAG);
+#ifdef LISP_FEATURE_SB_SAFEPOINT_STRICTLY
+ struct thread *self = arch_os_get_current_thread();
+ int was_pseudo_atomic = get_pseudo_atomic_atomic(self);
+ if (!was_pseudo_atomic)
+ set_pseudo_atomic_atomic(self);
+#else
+ gc_assert(get_pseudo_atomic_atomic(arch_os_get_current_thread()));
+#endif
+
+ lispobj *result = general_alloc(nbytes, BOXED_PAGE_FLAG);
+
+#ifdef LISP_FEATURE_SB_SAFEPOINT_STRICTLY
+ if (!was_pseudo_atomic)
+ clear_pseudo_atomic_atomic(self);
+#endif
+
+ return result;
}
\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. */
+ * should fall through to the general SIGSEGV/SIGBUS/whatever logic.
+ *
+ * We have two control flags for this: one causes us to ignore faults
+ * on unprotected pages completely, and the second complains to stderr
+ * but allows us to continue without losing.
+ */
+extern boolean ignore_memoryfaults_on_unprotected_pages;
+boolean ignore_memoryfaults_on_unprotected_pages = 0;
+
+extern boolean continue_after_memoryfault_on_unprotected_pages;
+boolean continue_after_memoryfault_on_unprotected_pages = 0;
int
gencgc_handle_wp_violation(void* fault_addr)
{
page_index_t page_index = find_page_index(fault_addr);
-#ifdef QSHOW_SIGNALS
+#if QSHOW_SIGNALS
FSHOW((stderr, "heap WP violation? fault_addr=%x, page_index=%d\n",
fault_addr, page_index));
#endif
return 0;
} else {
+ int ret;
+ ret = thread_mutex_lock(&free_pages_lock);
+ gc_assert(ret == 0);
if (page_table[page_index].write_protected) {
/* Unprotect the page. */
- os_protect(page_address(page_index), PAGE_BYTES, OS_VM_PROT_ALL);
+ os_protect(page_address(page_index), GENCGC_CARD_BYTES, OS_VM_PROT_ALL);
page_table[page_index].write_protected_cleared = 1;
page_table[page_index].write_protected = 0;
- } else {
+ } else if (!ignore_memoryfaults_on_unprotected_pages) {
/* 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 %d not marked as write-protected\nboxed_region.first_page: %d, boxed_region.last_page %d\n",
- page_index, boxed_region.first_page,
- boxed_region.last_page);
+ if(page_table[page_index].write_protected_cleared != 1) {
+ void lisp_backtrace(int frames);
+ lisp_backtrace(10);
+ fprintf(stderr,
+ "Fault @ %p, page %"PAGE_INDEX_FMT" not marked as write-protected:\n"
+ " boxed_region.first_page: %"PAGE_INDEX_FMT","
+ " boxed_region.last_page %"PAGE_INDEX_FMT"\n"
+ " page.scan_start_offset: %"OS_VM_SIZE_FMT"\n"
+ " page.bytes_used: %"PAGE_BYTES_FMT"\n"
+ " page.allocated: %d\n"
+ " page.write_protected: %d\n"
+ " page.write_protected_cleared: %d\n"
+ " page.generation: %d\n",
+ fault_addr,
+ page_index,
+ boxed_region.first_page,
+ boxed_region.last_page,
+ page_table[page_index].scan_start_offset,
+ page_table[page_index].bytes_used,
+ page_table[page_index].allocated,
+ page_table[page_index].write_protected,
+ page_table[page_index].write_protected_cleared,
+ page_table[page_index].gen);
+ if (!continue_after_memoryfault_on_unprotected_pages)
+ lose("Feh.\n");
+ }
}
+ ret = thread_mutex_unlock(&free_pages_lock);
+ gc_assert(ret == 0);
/* Don't worry, we can handle it. */
return 1;
}
{
/* Flush the alloc regions updating the tables. */
struct thread *th;
- for_each_thread(th)
+ for_each_thread(th) {
gc_alloc_update_page_tables(BOXED_PAGE_FLAG, &th->alloc_region);
+#if defined(LISP_FEATURE_SB_SAFEPOINT_STRICTLY) && !defined(LISP_FEATURE_WIN32)
+ gc_alloc_update_page_tables(BOXED_PAGE_FLAG, &th->sprof_alloc_region);
+#endif
+ }
gc_alloc_update_page_tables(UNBOXED_PAGE_FLAG, &unboxed_region);
gc_alloc_update_page_tables(BOXED_PAGE_FLAG, &boxed_region);
}
if (page_free_p(i)) {
#ifdef READ_PROTECT_FREE_PAGES
os_protect(page_address(i),
- PAGE_BYTES,
+ GENCGC_CARD_BYTES,
OS_VM_PROT_ALL);
#endif
zero_pages(i, i);
* SB!VM:RESTART-LISP-FUNCTION */
void
gc_and_save(char *filename, boolean prepend_runtime,
- boolean save_runtime_options)
+ boolean save_runtime_options, boolean compressed,
+ int compression_level, int application_type)
{
FILE *file;
void *runtime_bytes = NULL;
collect_garbage(HIGHEST_NORMAL_GENERATION+1);
if (prepend_runtime)
- save_runtime_to_filehandle(file, runtime_bytes, runtime_size);
+ save_runtime_to_filehandle(file, runtime_bytes, runtime_size,
+ application_type);
/* The dumper doesn't know that pages need to be zeroed before use. */
zero_all_free_pages();
save_to_filehandle(file, filename, SymbolValue(RESTART_LISP_FUNCTION,0),
- prepend_runtime, save_runtime_options);
+ prepend_runtime, save_runtime_options,
+ compressed ? compression_level : COMPRESSION_LEVEL_NONE);
/* Oops. Save still managed to fail. Since we've mangled the stack
* beyond hope, there's not much we can do.
* (beyond FUNCALLing RESTART_LISP_FUNCTION, but I suspect that's
projects / sbcl.git / blobdiff