X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Fsave.c;h=b3addc9f655c8c933666a22e10e9249ba6dd0ccc;hb=87cce4bfe714163f5ab7d211f439db567c7278d1;hp=2c527f8f4e32895aac9e1962042a50ac0b9bdefa;hpb=d7f6139a91d7d9b0667a597584ae306d958bb2f4;p=sbcl.git

diff --git a/src/runtime/save.c b/src/runtime/save.c
index 2c527f8..b3addc9 100644
--- a/src/runtime/save.c
+++ b/src/runtime/save.c
@@ -9,36 +9,86 @@
  * files for more information.
  */
 
+#ifndef LISP_FEATURE_WIN32
+#include <sys/types.h>
+#include <sys/stat.h>
+#endif
+#include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 #include <signal.h>
 #include <sys/file.h>
 
+#include "sbcl.h"
 #include "runtime.h"
 #include "os.h"
-#include "sbcl.h"
 #include "core.h"
 #include "globals.h"
 #include "save.h"
 #include "dynbind.h"
 #include "lispregs.h"
 #include "validate.h"
+#include "gc-internal.h"
+#include "thread.h"
 
-#ifdef GENCGC
-#include "gencgc.h"
+#include "genesis/static-symbols.h"
+#include "genesis/symbol.h"
+
+#if defined(LISP_FEATURE_SB_THREAD) && defined(LISP_FEATURE_SB_LUTEX)
+#include "genesis/lutex.h"
 #endif
 
+/* write_runtime_options uses a simple serialization scheme that
+ * consists of one word of magic, one word indicating whether options
+ * are actually saved, and one word per struct field. */
+static void
+write_runtime_options(FILE *file, struct runtime_options *options)
+{
+    size_t optarray[RUNTIME_OPTIONS_WORDS];
+
+    memset(&optarray, 0, sizeof(optarray));
+    optarray[0] = RUNTIME_OPTIONS_MAGIC;
+
+    if (options != NULL) {
+        /* optarray[1] is a flag indicating that options are present */
+        optarray[1] = 1;
+        optarray[2] = options->dynamic_space_size;
+        optarray[3] = options->thread_control_stack_size;
+    }
+
+    if (RUNTIME_OPTIONS_WORDS !=
+        fwrite(optarray, sizeof(size_t), RUNTIME_OPTIONS_WORDS, file)) {
+        perror("Error writing runtime options to file");
+    }
+}
+
+static void
+write_lispobj(lispobj obj, FILE *file)
+{
+    if (1 != fwrite(&obj, sizeof(lispobj), 1, file)) {
+        perror("Error writing to file");
+    }
+}
+
 static long
-write_bytes(FILE *file, char *addr, long bytes)
+write_bytes(FILE *file, char *addr, long bytes, os_vm_offset_t file_offset)
 {
     long count, here, data;
 
     bytes = (bytes+os_vm_page_size-1)&~(os_vm_page_size-1);
 
+#ifdef LISP_FEATURE_WIN32
+    /* touch every single page in the space to force it to be mapped. */
+    for (count = 0; count < bytes; count += 0x1000) {
+        volatile int temp = addr[count];
+    }
+#endif
+
     fflush(file);
     here = ftell(file);
-    fseek(file, 0, 2);
+    fseek(file, 0, SEEK_END);
     data = (ftell(file)+os_vm_page_size-1)&~(os_vm_page_size-1);
-    fseek(file, data, 0);
+    fseek(file, data, SEEK_SET);
 
     while (bytes > 0) {
         count = fwrite(addr, 1, bytes, file);
@@ -52,112 +102,432 @@ write_bytes(FILE *file, char *addr, long bytes)
         }
     }
     fflush(file);
-    fseek(file, here, 0);
-    return data/os_vm_page_size - 1;
+    fseek(file, here, SEEK_SET);
+    return ((data - file_offset) / os_vm_page_size) - 1;
+}
+
+#if defined(LISP_FEATURE_SB_THREAD) && defined(LISP_FEATURE_SB_LUTEX)
+/* saving lutexes in the core */
+static void **lutex_addresses;
+static long n_lutexes = 0;
+static long max_lutexes = 0;
+
+static long
+default_scan_action(lispobj *obj)
+{
+    return (sizetab[widetag_of(*obj)])(obj);
+}
+
+static long
+lutex_scan_action(lispobj *obj)
+{
+    /* note the address of the lutex */
+    if(n_lutexes >= max_lutexes) {
+        max_lutexes *= 2;
+        lutex_addresses = realloc(lutex_addresses, max_lutexes * sizeof(void *));
+        gc_assert(lutex_addresses);
+    }
+
+    lutex_addresses[n_lutexes++] = obj;
+
+    return (*sizetab[widetag_of(*obj)])(obj);
+}
+
+typedef long (*scan_table[256])(lispobj *obj);
+
+static void
+scan_objects(lispobj *start, long n_words, scan_table table)
+{
+    lispobj *end = start + n_words;
+    lispobj *object_ptr;
+    long n_words_scanned;
+    for (object_ptr = start;
+         object_ptr < end;
+         object_ptr += n_words_scanned) {
+        lispobj obj = *object_ptr;
+
+        n_words_scanned = (table[widetag_of(obj)])(object_ptr);
+    }
 }
 
 static void
-output_space(FILE *file, int id, lispobj *addr, lispobj *end)
+scan_for_lutexes(lispobj *addr, long n_words)
 {
-    int words, bytes, data;
+    static int initialized = 0;
+    static scan_table lutex_scan_table;
+
+    if (!initialized) {
+        int i;
+
+        /* allocate a little space to get started */
+        lutex_addresses = malloc(16*sizeof(void *));
+        gc_assert(lutex_addresses);
+        max_lutexes = 16;
+
+        /* initialize the mapping table */
+        for(i = 0; i < ((sizeof lutex_scan_table)/(sizeof lutex_scan_table[0])); ++i) {
+            lutex_scan_table[i] = default_scan_action;
+        }
+
+        lutex_scan_table[LUTEX_WIDETAG] = lutex_scan_action;
+
+        initialized = 1;
+    }
+
+    /* do the scan */
+    scan_objects(addr, n_words, lutex_scan_table);
+}
+#endif
+
+static void
+output_space(FILE *file, int id, lispobj *addr, lispobj *end, os_vm_offset_t file_offset)
+{
+    size_t words, bytes, data;
     static char *names[] = {NULL, "dynamic", "static", "read-only"};
 
-    putw(id, file);
+    write_lispobj(id, file);
     words = end - addr;
-    putw(words, file);
+    write_lispobj(words, file);
 
     bytes = words * sizeof(lispobj);
 
-    printf("writing %ld(0x%lx) bytes from the %s(%d) space at 0x%08lx\n",
-           (long)bytes, (long)bytes, names[id], id, (unsigned long)addr);
+#if defined(LISP_FEATURE_SB_THREAD) && defined(LISP_FEATURE_SB_LUTEX)
+    printf("scanning space for lutexes...\n");
+    scan_for_lutexes((char *)addr, words);
+#endif
+
+    printf("writing %lu bytes from the %s space at 0x%08lx\n",
+           (unsigned long)bytes, names[id], (unsigned long)addr);
 
-    data = write_bytes(file, (char *)addr, bytes);
+    data = write_bytes(file, (char *)addr, bytes, file_offset);
 
-    putw(data, file);
-    putw((long)addr / os_vm_page_size, file);
-    putw((bytes + os_vm_page_size - 1) / os_vm_page_size, file);
+    write_lispobj(data, file);
+    write_lispobj((long)addr / os_vm_page_size, file);
+    write_lispobj((bytes + os_vm_page_size - 1) / os_vm_page_size, file);
 }
 
-boolean
-save(char *filename, lispobj init_function)
+FILE *
+open_core_for_saving(char *filename)
 {
-    FILE *file;
-#if defined WANT_CGC
-    volatile lispobj*func_ptr = &init_function;
-    char sbuf[128];
-    strcpy(sbuf,filename);
-    filename=sbuf;
-    /* Get rid of remnant stuff. This is a MUST so that the memory
-     * manager can get started correctly when we restart after this
-     * save. Purify is going to maybe move the args so we need to
-     * consider them volatile, especially if the gcc optimizer is
-     * working!! */
-    purify(NIL,NIL);
-
-    init_function = *func_ptr;
-    /* Set dynamic space pointer to base value so we don't write out
-     * MBs of just cleared heap. */
-    if(SymbolValue(X86_CGC_ACTIVE_P) != NIL) {
-	SetSymbolValue(ALLOCATION_POINTER, DYNAMIC_SPACE_START);
-    }
-#endif
-    /* Open the file: */
+    /* Open the output file. We don't actually need the file yet, but
+     * the fopen() might fail for some reason, and we want to detect
+     * that and back out before we do anything irreversible. */
     unlink(filename);
-    file = fopen(filename, "w");
-    if (file == NULL) {
-        perror(filename);
-        return 1;
-    }
-    printf("[undoing binding stack... ");
+    return fopen(filename, "wb");
+}
+
+boolean
+save_to_filehandle(FILE *file, char *filename, lispobj init_function,
+                   boolean make_executable,
+                   boolean save_runtime_options)
+{
+    struct thread *th;
+    os_vm_offset_t core_start_pos;
+
+    /* Smash the enclosing state. (Once we do this, there's no good
+     * way to go back, which is a sufficient reason that this ends up
+     * being SAVE-LISP-AND-DIE instead of SAVE-LISP-AND-GO-ON). */
+    printf("[undoing binding stack and other enclosing state... ");
     fflush(stdout);
-    unbind_to_here((lispobj *)BINDING_STACK_START);
-    SetSymbolValue(CURRENT_CATCH_BLOCK, 0);
-    SetSymbolValue(CURRENT_UNWIND_PROTECT_BLOCK, 0);
-    SetSymbolValue(EVAL_STACK_TOP, 0);
+    for_each_thread(th) {       /* XXX really? */
+        unbind_to_here((lispobj *)th->binding_stack_start,th);
+        SetSymbolValue(CURRENT_CATCH_BLOCK, 0,th);
+        SetSymbolValue(CURRENT_UNWIND_PROTECT_BLOCK, 0,th);
+    }
     printf("done]\n");
-#if defined WANT_CGC && defined X86_CGC_ACTIVE_P
-    SetSymbolValue(X86_CGC_ACTIVE_P, T);
-#endif
+    fflush(stdout);
+
+    /* (Now we can actually start copying ourselves into the output file.) */
+
     printf("[saving current Lisp image into %s:\n", filename);
+    fflush(stdout);
 
-    putw(CORE_MAGIC, file);
+    core_start_pos = ftell(file);
+    write_lispobj(CORE_MAGIC, file);
 
-    putw(CORE_VERSION, file);
-    putw(3, file);
-    putw(SBCL_CORE_VERSION_INTEGER, file);
+    write_lispobj(VERSION_CORE_ENTRY_TYPE_CODE, file);
+    write_lispobj(3, file);
+    write_lispobj(SBCL_CORE_VERSION_INTEGER, file);
 
-    putw(CORE_NDIRECTORY, file);
-    putw((5*3)+2, file); /* 3 5-word space descriptors, plus code and count */
+    write_lispobj(BUILD_ID_CORE_ENTRY_TYPE_CODE, file);
+    write_lispobj(/* (We're writing the word count of the entry here, and the 2
+          * term is one word for the leading BUILD_ID_CORE_ENTRY_TYPE_CODE
+          * word and one word where we store the count itself.) */
+         2 + strlen((const char *)build_id),
+         file);
+    {
+        unsigned char *p;
+        for (p = (unsigned char *)build_id; *p; ++p)
+            write_lispobj(*p, file);
+    }
 
-    output_space(file, READ_ONLY_SPACE_ID, (lispobj *)READ_ONLY_SPACE_START,
-		 (lispobj *)SymbolValue(READ_ONLY_SPACE_FREE_POINTER));
-    output_space(file, STATIC_SPACE_ID, (lispobj *)STATIC_SPACE_START,
-		 (lispobj *)SymbolValue(STATIC_SPACE_FREE_POINTER));
+    write_lispobj(NEW_DIRECTORY_CORE_ENTRY_TYPE_CODE, file);
+    write_lispobj(/* (word count = 3 spaces described by 5 words each, plus the
+          * entry type code, plus this count itself) */
+         (5*3)+2, file);
+    output_space(file,
+                 READ_ONLY_CORE_SPACE_ID,
+                 (lispobj *)READ_ONLY_SPACE_START,
+                 (lispobj *)SymbolValue(READ_ONLY_SPACE_FREE_POINTER,0),
+                 core_start_pos);
+    output_space(file,
+                 STATIC_CORE_SPACE_ID,
+                 (lispobj *)STATIC_SPACE_START,
+                 (lispobj *)SymbolValue(STATIC_SPACE_FREE_POINTER,0),
+                 core_start_pos);
+#ifdef LISP_FEATURE_GENCGC
+    /* Flush the current_region, updating the tables. */
+    gc_alloc_update_all_page_tables();
+    update_dynamic_space_free_pointer();
+#endif
 #ifdef reg_ALLOC
-    output_space(file, DYNAMIC_SPACE_ID, (lispobj *)current_dynamic_space,
-		 dynamic_space_free_pointer);
+#ifdef LISP_FEATURE_GENCGC
+    output_space(file,
+                 DYNAMIC_CORE_SPACE_ID,
+                 (lispobj *)DYNAMIC_SPACE_START,
+                 dynamic_space_free_pointer,
+                 core_start_pos);
 #else
-#ifdef GENCGC
-    /* Flush the current_region updating the tables. */
-    gc_alloc_update_page_tables(0,&boxed_region);
-    gc_alloc_update_page_tables(1,&unboxed_region);
-    update_x86_dynamic_space_free_pointer();
+    output_space(file,
+                 DYNAMIC_CORE_SPACE_ID,
+                 (lispobj *)current_dynamic_space,
+                 dynamic_space_free_pointer,
+                 core_start_pos);
 #endif
-    output_space(file, DYNAMIC_SPACE_ID, (lispobj *)DYNAMIC_SPACE_START,
-		 (lispobj *)SymbolValue(ALLOCATION_POINTER));
+#else
+    output_space(file,
+                 DYNAMIC_CORE_SPACE_ID,
+                 (lispobj *)DYNAMIC_SPACE_START,
+                 (lispobj *)SymbolValue(ALLOCATION_POINTER,0),
+                 core_start_pos);
 #endif
 
-    FSHOW((stderr, "/writing init_function=0x%lx\n", (long)init_function));
-    FSHOW((stderr, "/(SymbolValue(ALLOCATION_POINTER)=0x%lx\n",
-	   (long)SymbolValue(ALLOCATION_POINTER)));
-    putw(CORE_INITIAL_FUNCTION, file);
-    putw(3, file);
-    putw(init_function, file);
+    write_lispobj(INITIAL_FUN_CORE_ENTRY_TYPE_CODE, file);
+    write_lispobj(3, file);
+    write_lispobj(init_function, file);
+
+#ifdef LISP_FEATURE_GENCGC
+    {
+        size_t size = (last_free_page*sizeof(long)+os_vm_page_size-1)
+            &~(os_vm_page_size-1);
+        unsigned long *data = calloc(size, 1);
+        if (data) {
+            unsigned long word;
+            long offset;
+            int i;
+            for (i = 0; i < last_free_page; i++) {
+                /* Thanks to alignment requirements, the two low bits
+                 * are always zero, so we can use them to store the
+                 * allocation type -- region is always closed, so only
+                 * the two low bits of allocation flags matter. */
+                word = page_table[i].region_start_offset;
+                gc_assert((word & 0x03) == 0);
+                data[i] = word | (0x03 & page_table[i].allocated);
+            }
+            write_lispobj(PAGE_TABLE_CORE_ENTRY_TYPE_CODE, file);
+            write_lispobj(4, file);
+            write_lispobj(size, file);
+            offset = write_bytes(file, (char *)data, size, core_start_pos);
+            write_lispobj(offset, file);
+        }
+    }
+#endif
 
-    putw(CORE_END, file);
-    fclose(file);
+#if defined(LISP_FEATURE_SB_THREAD) && defined(LISP_FEATURE_SB_LUTEX)
+    if(n_lutexes > 0) {
+        long offset;
+        printf("writing %ld lutexes to the core...\n", n_lutexes);
+        write_lispobj(LUTEX_TABLE_CORE_ENTRY_TYPE_CODE, file);
+        /* word count of the entry */
+        write_lispobj(4, file);
+        /* indicate how many lutexes we saved */
+        write_lispobj(n_lutexes, file);
+        /* save the lutexes */
+        offset = write_bytes(file, (char *) lutex_addresses,
+                             n_lutexes * sizeof(*lutex_addresses),
+                             core_start_pos);
 
-    printf("done]\n");
+        write_lispobj(offset, file);
+    }
+#endif
 
+    write_lispobj(END_CORE_ENTRY_TYPE_CODE, file);
+
+    /* Write a trailing header, ignored when parsing the core normally.
+     * This is used to locate the start of the core when the runtime is
+     * prepended to it. */
+    fseek(file, 0, SEEK_END);
+
+    /* If NULL runtime options are passed to write_runtime_options,
+     * command-line processing is performed as normal in the SBCL
+     * executable. Otherwise, the saved runtime options are used and
+     * all command-line arguments are available to Lisp in
+     * SB-EXT:*POSIX-ARGV*. */
+    write_runtime_options(file,
+                          (save_runtime_options ? runtime_options : NULL));
+
+    if (1 != fwrite(&core_start_pos, sizeof(os_vm_offset_t), 1, file)) {
+        perror("Error writing core starting position to file");
+        fclose(file);
+    } else {
+        write_lispobj(CORE_MAGIC, file);
+        fclose(file);
+    }
+
+#ifndef LISP_FEATURE_WIN32
+    if (make_executable)
+        chmod (filename, 0755);
+#endif
+
+    printf("done]\n");
     exit(0);
 }
+
+/* Check if the build_id for the current runtime is present in a
+ * buffer. */
+int
+check_runtime_build_id(void *buf, size_t size)
+{
+    size_t idlen;
+    char *pos;
+
+    idlen = strlen(build_id) - 1;
+    while ((pos = memchr(buf, build_id[0], size)) != NULL) {
+        size -= (pos + 1) - (char *)buf;
+        buf = (pos + 1);
+        if (idlen <= size && memcmp(buf, build_id + 1, idlen) == 0)
+            return 1;
+    }
+
+    return 0;
+}
+
+/* Slurp the executable portion of the runtime into a malloced buffer
+ * and return it.  Places the size in bytes of the runtime into
+ * 'size_out'.  Returns NULL if the runtime cannot be loaded from
+ * 'runtime_path'. */
+void *
+load_runtime(char *runtime_path, size_t *size_out)
+{
+    void *buf = NULL;
+    FILE *input = NULL;
+    size_t size, count;
+    os_vm_offset_t core_offset;
+
+    core_offset = search_for_embedded_core (runtime_path);
+    if ((input = fopen(runtime_path, "rb")) == NULL) {
+        fprintf(stderr, "Unable to open runtime: %s\n", runtime_path);
+        goto lose;
+    }
+
+    fseek(input, 0, SEEK_END);
+    size = (size_t) ftell(input);
+    fseek(input, 0, SEEK_SET);
+
+    if (core_offset != -1 && size > core_offset)
+        size = core_offset;
+
+    buf = successful_malloc(size);
+    if ((count = fread(buf, 1, size, input)) != size) {
+        fprintf(stderr, "Premature EOF while reading runtime.\n");
+        goto lose;
+    }
+
+    if (!check_runtime_build_id(buf, size)) {
+        fprintf(stderr, "Failed to locate current build_id in runtime: %s\n",
+            runtime_path);
+        goto lose;
+    }
+
+    fclose(input);
+    *size_out = size;
+    return buf;
+
+lose:
+    if (input != NULL)
+        fclose(input);
+    if (buf != NULL)
+        free(buf);
+    return NULL;
+}
+
+boolean
+save_runtime_to_filehandle(FILE *output, void *runtime, size_t runtime_size)
+{
+    size_t padding;
+    void *padbytes;
+
+    if (runtime_size != fwrite(runtime, 1, runtime_size, output)) {
+        perror("Error saving runtime");
+        return 0;
+    }
+
+    padding = (os_vm_page_size - (runtime_size % os_vm_page_size)) & ~os_vm_page_size;
+    if (padding > 0) {
+        padbytes = successful_malloc(padding);
+        memset(padbytes, 0, padding);
+        if (padding != fwrite(padbytes, 1, padding, output)) {
+            perror("Error saving runtime");
+            free(padbytes);
+            return 0;
+        }
+        free(padbytes);
+    }
+
+    return 1;
+}
+
+FILE *
+prepare_to_save(char *filename, boolean prepend_runtime, void **runtime_bytes,
+                size_t *runtime_size)
+{
+    FILE *file;
+    char *runtime_path;
+
+    if (prepend_runtime) {
+        runtime_path = os_get_runtime_executable_path(0);
+
+        if (runtime_path == NULL && saved_runtime_path == NULL) {
+            fprintf(stderr, "Unable to get default runtime path.\n");
+            return NULL;
+        }
+
+        if (runtime_path == NULL)
+            *runtime_bytes = load_runtime(saved_runtime_path, runtime_size);
+        else {
+            *runtime_bytes = load_runtime(runtime_path, runtime_size);
+            free(runtime_path);
+        }
+
+        if (*runtime_bytes == NULL)
+            return 0;
+    }
+
+    file = open_core_for_saving(filename);
+    if (file == NULL) {
+        free(*runtime_bytes);
+        perror(filename);
+        return NULL;
+    }
+
+    return file;
+}
+
+boolean
+save(char *filename, lispobj init_function, boolean prepend_runtime,
+     boolean save_runtime_options)
+{
+    FILE *file;
+    void *runtime_bytes = NULL;
+    size_t runtime_size;
+
+    file = prepare_to_save(filename, prepend_runtime, &runtime_bytes, &runtime_size);
+    if (file == NULL)
+        return 1;
+
+    if (prepend_runtime)
+        save_runtime_to_filehandle(file, runtime_bytes, runtime_size);
+
+    return save_to_filehandle(file, filename, init_function, prepend_runtime,
+                              save_runtime_options);
+}