--- /dev/null
+/*
+ * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
+ * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
+ * Copyright (c) 1999-2001 by Hewlett-Packard Company. All rights reserved.
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ */
+
+#include "private/gc_pmark.h"
+
+#include <stdio.h>
+#include <limits.h>
+#include <stdarg.h>
+
+#ifndef MSWINCE
+# include <signal.h>
+#endif
+
+#ifdef GC_SOLARIS_THREADS
+# include <sys/syscall.h>
+#endif
+#if defined(MSWIN32) || defined(MSWINCE) \
+ || (defined(CYGWIN32) && defined(GC_READ_ENV_FILE))
+# ifndef WIN32_LEAN_AND_MEAN
+# define WIN32_LEAN_AND_MEAN 1
+# endif
+# define NOSERVICE
+# include <windows.h>
+#endif
+
+#if defined(UNIX_LIKE) || defined(CYGWIN32)
+# include <fcntl.h>
+# include <sys/types.h>
+# include <sys/stat.h>
+#endif
+
+#ifdef NONSTOP
+# include <floss.h>
+#endif
+
+#ifdef THREADS
+# ifdef PCR
+# include "il/PCR_IL.h"
+ GC_INNER PCR_Th_ML GC_allocate_ml;
+# elif defined(SN_TARGET_PS3)
+# include <pthread.h>
+ GC_INNER pthread_mutex_t GC_allocate_ml;
+# endif
+ /* For other platforms with threads, the lock and possibly */
+ /* GC_lock_holder variables are defined in the thread support code. */
+#endif /* THREADS */
+
+#ifdef DYNAMIC_LOADING
+ /* We need to register the main data segment. Returns TRUE unless */
+ /* this is done implicitly as part of dynamic library registration. */
+# define GC_REGISTER_MAIN_STATIC_DATA() GC_register_main_static_data()
+#else
+ /* Don't unnecessarily call GC_register_main_static_data() in case */
+ /* dyn_load.c isn't linked in. */
+# define GC_REGISTER_MAIN_STATIC_DATA() TRUE
+#endif
+
+#ifdef NEED_CANCEL_DISABLE_COUNT
+ __thread unsigned char GC_cancel_disable_count = 0;
+#endif
+
+GC_FAR struct _GC_arrays GC_arrays /* = { 0 } */;
+
+GC_INNER GC_bool GC_debugging_started = FALSE;
+ /* defined here so we don't have to load debug_malloc.o */
+
+ptr_t GC_stackbottom = 0;
+
+#ifdef IA64
+ ptr_t GC_register_stackbottom = 0;
+#endif
+
+GC_bool GC_dont_gc = 0;
+
+GC_bool GC_dont_precollect = 0;
+
+GC_bool GC_quiet = 0; /* used also in pcr_interface.c */
+
+#ifndef SMALL_CONFIG
+ GC_bool GC_print_stats = 0;
+#endif
+
+#ifdef GC_PRINT_BACK_HEIGHT
+ GC_INNER GC_bool GC_print_back_height = TRUE;
+#else
+ GC_INNER GC_bool GC_print_back_height = FALSE;
+#endif
+
+#ifndef NO_DEBUGGING
+ GC_INNER GC_bool GC_dump_regularly = FALSE;
+ /* Generate regular debugging dumps. */
+#endif
+
+#ifdef KEEP_BACK_PTRS
+ GC_INNER long GC_backtraces = 0;
+ /* Number of random backtraces to generate for each GC. */
+#endif
+
+#ifdef FIND_LEAK
+ int GC_find_leak = 1;
+#else
+ int GC_find_leak = 0;
+#endif
+
+#ifndef SHORT_DBG_HDRS
+# ifdef GC_FINDLEAK_DELAY_FREE
+ GC_INNER GC_bool GC_findleak_delay_free = TRUE;
+# else
+ GC_INNER GC_bool GC_findleak_delay_free = FALSE;
+# endif
+#endif /* !SHORT_DBG_HDRS */
+
+#ifdef ALL_INTERIOR_POINTERS
+ int GC_all_interior_pointers = 1;
+#else
+ int GC_all_interior_pointers = 0;
+#endif
+
+#ifdef GC_FORCE_UNMAP_ON_GCOLLECT
+ /* Has no effect unless USE_MUNMAP. */
+ /* Has no effect on implicitly-initiated garbage collections. */
+ GC_INNER GC_bool GC_force_unmap_on_gcollect = TRUE;
+#else
+ GC_INNER GC_bool GC_force_unmap_on_gcollect = FALSE;
+#endif
+
+#ifndef GC_LARGE_ALLOC_WARN_INTERVAL
+# define GC_LARGE_ALLOC_WARN_INTERVAL 5
+#endif
+GC_INNER long GC_large_alloc_warn_interval = GC_LARGE_ALLOC_WARN_INTERVAL;
+ /* Interval between unsuppressed warnings. */
+
+/*ARGSUSED*/
+STATIC void * GC_CALLBACK GC_default_oom_fn(size_t bytes_requested)
+{
+ return(0);
+}
+
+/* All accesses to it should be synchronized to avoid data races. */
+GC_oom_func GC_oom_fn = GC_default_oom_fn;
+
+#ifdef CAN_HANDLE_FORK
+# ifdef HANDLE_FORK
+ GC_INNER GC_bool GC_handle_fork = TRUE;
+ /* The value is examined by GC_thr_init. */
+# else
+ GC_INNER GC_bool GC_handle_fork = FALSE;
+# endif
+#endif /* CAN_HANDLE_FORK */
+
+/* Overrides the default handle-fork mode. Non-zero value means GC */
+/* should install proper pthread_atfork handlers (or abort if not */
+/* supported). Has effect only if called before GC_INIT. */
+/*ARGSUSED*/
+GC_API void GC_CALL GC_set_handle_fork(int value)
+{
+# ifdef CAN_HANDLE_FORK
+ if (!GC_is_initialized)
+ GC_handle_fork = (GC_bool)value;
+# elif defined(THREADS) || (defined(DARWIN) && defined(MPROTECT_VDB))
+ if (!GC_is_initialized && value)
+ ABORT("fork() handling disabled");
+# else
+ /* No at-fork handler is needed in the single-threaded mode. */
+# endif
+}
+
+/* Set things up so that GC_size_map[i] >= granules(i), */
+/* but not too much bigger */
+/* and so that size_map contains relatively few distinct entries */
+/* This was originally stolen from Russ Atkinson's Cedar */
+/* quantization algorithm (but we precompute it). */
+STATIC void GC_init_size_map(void)
+{
+ int i;
+
+ /* Map size 0 to something bigger. */
+ /* This avoids problems at lower levels. */
+ GC_size_map[0] = 1;
+ for (i = 1; i <= GRANULES_TO_BYTES(TINY_FREELISTS-1) - EXTRA_BYTES; i++) {
+ GC_size_map[i] = ROUNDED_UP_GRANULES(i);
+# ifndef _MSC_VER
+ GC_ASSERT(GC_size_map[i] < TINY_FREELISTS);
+ /* Seems to tickle bug in VC++ 2008 for AMD64 */
+# endif
+ }
+ /* We leave the rest of the array to be filled in on demand. */
+}
+
+/* Fill in additional entries in GC_size_map, including the ith one */
+/* We assume the ith entry is currently 0. */
+/* Note that a filled in section of the array ending at n always */
+/* has length at least n/4. */
+GC_INNER void GC_extend_size_map(size_t i)
+{
+ size_t orig_granule_sz = ROUNDED_UP_GRANULES(i);
+ size_t granule_sz = orig_granule_sz;
+ size_t byte_sz = GRANULES_TO_BYTES(granule_sz);
+ /* The size we try to preserve. */
+ /* Close to i, unless this would */
+ /* introduce too many distinct sizes. */
+ size_t smaller_than_i = byte_sz - (byte_sz >> 3);
+ size_t much_smaller_than_i = byte_sz - (byte_sz >> 2);
+ size_t low_limit; /* The lowest indexed entry we */
+ /* initialize. */
+ size_t j;
+
+ if (GC_size_map[smaller_than_i] == 0) {
+ low_limit = much_smaller_than_i;
+ while (GC_size_map[low_limit] != 0) low_limit++;
+ } else {
+ low_limit = smaller_than_i + 1;
+ while (GC_size_map[low_limit] != 0) low_limit++;
+ granule_sz = ROUNDED_UP_GRANULES(low_limit);
+ granule_sz += granule_sz >> 3;
+ if (granule_sz < orig_granule_sz) granule_sz = orig_granule_sz;
+ }
+ /* For these larger sizes, we use an even number of granules. */
+ /* This makes it easier to, for example, construct a 16byte-aligned */
+ /* allocator even if GRANULE_BYTES is 8. */
+ granule_sz += 1;
+ granule_sz &= ~1;
+ if (granule_sz > MAXOBJGRANULES) {
+ granule_sz = MAXOBJGRANULES;
+ }
+ /* If we can fit the same number of larger objects in a block, */
+ /* do so. */
+ {
+ size_t number_of_objs = HBLK_GRANULES/granule_sz;
+ granule_sz = HBLK_GRANULES/number_of_objs;
+ granule_sz &= ~1;
+ }
+ byte_sz = GRANULES_TO_BYTES(granule_sz);
+ /* We may need one extra byte; */
+ /* don't always fill in GC_size_map[byte_sz] */
+ byte_sz -= EXTRA_BYTES;
+
+ for (j = low_limit; j <= byte_sz; j++) GC_size_map[j] = granule_sz;
+}
+
+
+/*
+ * The following is a gross hack to deal with a problem that can occur
+ * on machines that are sloppy about stack frame sizes, notably SPARC.
+ * Bogus pointers may be written to the stack and not cleared for
+ * a LONG time, because they always fall into holes in stack frames
+ * that are not written. We partially address this by clearing
+ * sections of the stack whenever we get control.
+ */
+# ifdef THREADS
+# define BIG_CLEAR_SIZE 2048 /* Clear this much now and then. */
+# define SMALL_CLEAR_SIZE 256 /* Clear this much every time. */
+# else
+ STATIC word GC_stack_last_cleared = 0; /* GC_no when we last did this */
+ STATIC ptr_t GC_min_sp = NULL;
+ /* Coolest stack pointer value from which */
+ /* we've already cleared the stack. */
+ STATIC ptr_t GC_high_water = NULL;
+ /* "hottest" stack pointer value we have seen */
+ /* recently. Degrades over time. */
+ STATIC word GC_bytes_allocd_at_reset = 0;
+# define DEGRADE_RATE 50
+# endif
+
+# define CLEAR_SIZE 213 /* Granularity for GC_clear_stack_inner */
+
+#if defined(ASM_CLEAR_CODE)
+ void *GC_clear_stack_inner(void *, ptr_t);
+#else
+ /* Clear the stack up to about limit. Return arg. This function is */
+ /* not static because it could also be errorneously defined in .S */
+ /* file, so this error would be caught by the linker. */
+ /*ARGSUSED*/
+ void * GC_clear_stack_inner(void *arg, ptr_t limit)
+ {
+ volatile word dummy[CLEAR_SIZE];
+
+ BZERO((/* no volatile */ void *)dummy, sizeof(dummy));
+ if ((word)GC_approx_sp() COOLER_THAN (word)limit) {
+ (void) GC_clear_stack_inner(arg, limit);
+ }
+ /* Make sure the recursive call is not a tail call, and the bzero */
+ /* call is not recognized as dead code. */
+ GC_noop1((word)dummy);
+ return(arg);
+ }
+#endif
+
+/* Clear some of the inaccessible part of the stack. Returns its */
+/* argument, so it can be used in a tail call position, hence clearing */
+/* another frame. */
+GC_API void * GC_CALL GC_clear_stack(void *arg)
+{
+ ptr_t sp = GC_approx_sp(); /* Hotter than actual sp */
+# ifdef THREADS
+ word dummy[SMALL_CLEAR_SIZE];
+ static unsigned random_no = 0;
+ /* Should be more random than it is ... */
+ /* Used to occasionally clear a bigger */
+ /* chunk. */
+# endif
+ ptr_t limit;
+
+# define SLOP 400
+ /* Extra bytes we clear every time. This clears our own */
+ /* activation record, and should cause more frequent */
+ /* clearing near the cold end of the stack, a good thing. */
+# define GC_SLOP 4000
+ /* We make GC_high_water this much hotter than we really saw */
+ /* saw it, to cover for GC noise etc. above our current frame. */
+# define CLEAR_THRESHOLD 100000
+ /* We restart the clearing process after this many bytes of */
+ /* allocation. Otherwise very heavily recursive programs */
+ /* with sparse stacks may result in heaps that grow almost */
+ /* without bounds. As the heap gets larger, collection */
+ /* frequency decreases, thus clearing frequency would decrease, */
+ /* thus more junk remains accessible, thus the heap gets */
+ /* larger ... */
+# ifdef THREADS
+ if (++random_no % 13 == 0) {
+ limit = sp;
+ MAKE_HOTTER(limit, BIG_CLEAR_SIZE*sizeof(word));
+ limit = (ptr_t)((word)limit & ~0xf);
+ /* Make it sufficiently aligned for assembly */
+ /* implementations of GC_clear_stack_inner. */
+ return GC_clear_stack_inner(arg, limit);
+ } else {
+ BZERO(dummy, SMALL_CLEAR_SIZE*sizeof(word));
+ return arg;
+ }
+# else
+ if (GC_gc_no > GC_stack_last_cleared) {
+ /* Start things over, so we clear the entire stack again */
+ if (GC_stack_last_cleared == 0) GC_high_water = (ptr_t)GC_stackbottom;
+ GC_min_sp = GC_high_water;
+ GC_stack_last_cleared = GC_gc_no;
+ GC_bytes_allocd_at_reset = GC_bytes_allocd;
+ }
+ /* Adjust GC_high_water */
+ MAKE_COOLER(GC_high_water, WORDS_TO_BYTES(DEGRADE_RATE) + GC_SLOP);
+ if (sp HOTTER_THAN GC_high_water) {
+ GC_high_water = sp;
+ }
+ MAKE_HOTTER(GC_high_water, GC_SLOP);
+ limit = GC_min_sp;
+ MAKE_HOTTER(limit, SLOP);
+ if (sp COOLER_THAN limit) {
+ limit = (ptr_t)((word)limit & ~0xf);
+ /* Make it sufficiently aligned for assembly */
+ /* implementations of GC_clear_stack_inner. */
+ GC_min_sp = sp;
+ return(GC_clear_stack_inner(arg, limit));
+ } else if (GC_bytes_allocd - GC_bytes_allocd_at_reset > CLEAR_THRESHOLD) {
+ /* Restart clearing process, but limit how much clearing we do. */
+ GC_min_sp = sp;
+ MAKE_HOTTER(GC_min_sp, CLEAR_THRESHOLD/4);
+ if (GC_min_sp HOTTER_THAN GC_high_water) GC_min_sp = GC_high_water;
+ GC_bytes_allocd_at_reset = GC_bytes_allocd;
+ }
+ return(arg);
+# endif
+}
+
+
+/* Return a pointer to the base address of p, given a pointer to a */
+/* an address within an object. Return 0 o.w. */
+GC_API void * GC_CALL GC_base(void * p)
+{
+ ptr_t r;
+ struct hblk *h;
+ bottom_index *bi;
+ hdr *candidate_hdr;
+ ptr_t limit;
+
+ r = p;
+ if (!GC_is_initialized) return 0;
+ h = HBLKPTR(r);
+ GET_BI(r, bi);
+ candidate_hdr = HDR_FROM_BI(bi, r);
+ if (candidate_hdr == 0) return(0);
+ /* If it's a pointer to the middle of a large object, move it */
+ /* to the beginning. */
+ while (IS_FORWARDING_ADDR_OR_NIL(candidate_hdr)) {
+ h = FORWARDED_ADDR(h,candidate_hdr);
+ r = (ptr_t)h;
+ candidate_hdr = HDR(h);
+ }
+ if (HBLK_IS_FREE(candidate_hdr)) return(0);
+ /* Make sure r points to the beginning of the object */
+ r = (ptr_t)((word)r & ~(WORDS_TO_BYTES(1) - 1));
+ {
+ size_t offset = HBLKDISPL(r);
+ word sz = candidate_hdr -> hb_sz;
+ size_t obj_displ = offset % sz;
+
+ r -= obj_displ;
+ limit = r + sz;
+ if (limit > (ptr_t)(h + 1) && sz <= HBLKSIZE) {
+ return(0);
+ }
+ if ((ptr_t)p >= limit) return(0);
+ }
+ return((void *)r);
+}
+
+
+/* Return the size of an object, given a pointer to its base. */
+/* (For small objects this also happens to work from interior pointers, */
+/* but that shouldn't be relied upon.) */
+GC_API size_t GC_CALL GC_size(const void * p)
+{
+ hdr * hhdr = HDR(p);
+
+ return hhdr -> hb_sz;
+}
+
+
+/* These getters remain unsynchronized for compatibility (since some */
+/* clients could call some of them from a GC callback holding the */
+/* allocator lock). */
+GC_API size_t GC_CALL GC_get_heap_size(void)
+{
+ /* ignore the memory space returned to OS (i.e. count only the */
+ /* space owned by the garbage collector) */
+ return (size_t)(GC_heapsize - GC_unmapped_bytes);
+}
+
+GC_API size_t GC_CALL GC_get_free_bytes(void)
+{
+ /* ignore the memory space returned to OS */
+ return (size_t)(GC_large_free_bytes - GC_unmapped_bytes);
+}
+
+GC_API size_t GC_CALL GC_get_unmapped_bytes(void)
+{
+ return (size_t)GC_unmapped_bytes;
+}
+
+GC_API size_t GC_CALL GC_get_bytes_since_gc(void)
+{
+ return (size_t)GC_bytes_allocd;
+}
+
+GC_API size_t GC_CALL GC_get_total_bytes(void)
+{
+ return (size_t)(GC_bytes_allocd + GC_bytes_allocd_before_gc);
+}
+
+/* Return the heap usage information. This is a thread-safe (atomic) */
+/* alternative for the five above getters. NULL pointer is allowed for */
+/* any argument. Returned (filled in) values are of word type. */
+GC_API void GC_CALL GC_get_heap_usage_safe(GC_word *pheap_size,
+ GC_word *pfree_bytes, GC_word *punmapped_bytes,
+ GC_word *pbytes_since_gc, GC_word *ptotal_bytes)
+{
+ DCL_LOCK_STATE;
+
+ LOCK();
+ if (pheap_size != NULL)
+ *pheap_size = GC_heapsize - GC_unmapped_bytes;
+ if (pfree_bytes != NULL)
+ *pfree_bytes = GC_large_free_bytes - GC_unmapped_bytes;
+ if (punmapped_bytes != NULL)
+ *punmapped_bytes = GC_unmapped_bytes;
+ if (pbytes_since_gc != NULL)
+ *pbytes_since_gc = GC_bytes_allocd;
+ if (ptotal_bytes != NULL)
+ *ptotal_bytes = GC_bytes_allocd + GC_bytes_allocd_before_gc;
+ UNLOCK();
+}
+
+
+#ifdef THREADS
+ GC_API int GC_CALL GC_get_suspend_signal(void)
+ {
+# ifdef SIG_SUSPEND
+ return SIG_SUSPEND;
+# else
+ return -1;
+# endif
+ }
+#endif /* THREADS */
+
+#if !defined(_MAX_PATH) && (defined(MSWIN32) || defined(MSWINCE) \
+ || defined(CYGWIN32))
+# define _MAX_PATH MAX_PATH
+#endif
+
+#ifdef GC_READ_ENV_FILE
+ /* This works for Win32/WinCE for now. Really useful only for WinCE. */
+ STATIC char *GC_envfile_content = NULL;
+ /* The content of the GC "env" file with CR and */
+ /* LF replaced to '\0'. NULL if the file is */
+ /* missing or empty. Otherwise, always ends */
+ /* with '\0'. */
+ STATIC unsigned GC_envfile_length = 0;
+ /* Length of GC_envfile_content (if non-NULL). */
+
+# ifndef GC_ENVFILE_MAXLEN
+# define GC_ENVFILE_MAXLEN 0x4000
+# endif
+
+ /* The routine initializes GC_envfile_content from the GC "env" file. */
+ STATIC void GC_envfile_init(void)
+ {
+# if defined(MSWIN32) || defined(MSWINCE) || defined(CYGWIN32)
+ HANDLE hFile;
+ char *content;
+ unsigned ofs;
+ unsigned len;
+ DWORD nBytesRead;
+ TCHAR path[_MAX_PATH + 0x10]; /* buffer for path + ext */
+ len = (unsigned)GetModuleFileName(NULL /* hModule */, path,
+ _MAX_PATH + 1);
+ /* If GetModuleFileName() has failed then len is 0. */
+ if (len > 4 && path[len - 4] == (TCHAR)'.') {
+ len -= 4; /* strip executable file extension */
+ }
+ memcpy(&path[len], TEXT(".gc.env"), sizeof(TEXT(".gc.env")));
+ hFile = CreateFile(path, GENERIC_READ,
+ FILE_SHARE_READ | FILE_SHARE_WRITE,
+ NULL /* lpSecurityAttributes */, OPEN_EXISTING,
+ FILE_ATTRIBUTE_NORMAL, NULL /* hTemplateFile */);
+ if (hFile == INVALID_HANDLE_VALUE)
+ return; /* the file is absent or the operation is failed */
+ len = (unsigned)GetFileSize(hFile, NULL);
+ if (len <= 1 || len >= GC_ENVFILE_MAXLEN) {
+ CloseHandle(hFile);
+ return; /* invalid file length - ignoring the file content */
+ }
+ /* At this execution point, GC_setpagesize() and GC_init_win32() */
+ /* must already be called (for GET_MEM() to work correctly). */
+ content = (char *)GET_MEM(len + 1);
+ if (content == NULL) {
+ CloseHandle(hFile);
+ return; /* allocation failure */
+ }
+ ofs = 0;
+ nBytesRead = (DWORD)-1L;
+ /* Last ReadFile() call should clear nBytesRead on success. */
+ while (ReadFile(hFile, content + ofs, len - ofs + 1, &nBytesRead,
+ NULL /* lpOverlapped */) && nBytesRead != 0) {
+ if ((ofs += nBytesRead) > len)
+ break;
+ }
+ CloseHandle(hFile);
+ if (ofs != len || nBytesRead != 0)
+ return; /* read operation is failed - ignoring the file content */
+ content[ofs] = '\0';
+ while (ofs-- > 0) {
+ if (content[ofs] == '\r' || content[ofs] == '\n')
+ content[ofs] = '\0';
+ }
+ GC_envfile_length = len + 1;
+ GC_envfile_content = content;
+# endif
+ }
+
+ /* This routine scans GC_envfile_content for the specified */
+ /* environment variable (and returns its value if found). */
+ GC_INNER char * GC_envfile_getenv(const char *name)
+ {
+ char *p;
+ char *end_of_content;
+ unsigned namelen;
+# ifndef NO_GETENV
+ p = getenv(name); /* try the standard getenv() first */
+ if (p != NULL)
+ return *p != '\0' ? p : NULL;
+# endif
+ p = GC_envfile_content;
+ if (p == NULL)
+ return NULL; /* "env" file is absent (or empty) */
+ namelen = strlen(name);
+ if (namelen == 0) /* a sanity check */
+ return NULL;
+ for (end_of_content = p + GC_envfile_length;
+ p != end_of_content; p += strlen(p) + 1) {
+ if (strncmp(p, name, namelen) == 0 && *(p += namelen) == '=') {
+ p++; /* the match is found; skip '=' */
+ return *p != '\0' ? p : NULL;
+ }
+ /* If not matching then skip to the next line. */
+ }
+ return NULL; /* no match found */
+ }
+#endif /* GC_READ_ENV_FILE */
+
+GC_INNER GC_bool GC_is_initialized = FALSE;
+
+#if (defined(MSWIN32) || defined(MSWINCE)) && defined(THREADS)
+ GC_INNER CRITICAL_SECTION GC_write_cs;
+#endif
+
+STATIC void GC_exit_check(void)
+{
+ GC_gcollect();
+}
+
+#ifdef UNIX_LIKE
+ static void looping_handler(int sig)
+ {
+ GC_err_printf("Caught signal %d: looping in handler\n", sig);
+ for (;;) {}
+ }
+
+ static GC_bool installed_looping_handler = FALSE;
+
+ static void maybe_install_looping_handler(void)
+ {
+ /* Install looping handler before the write fault handler, so we */
+ /* handle write faults correctly. */
+ if (!installed_looping_handler && 0 != GETENV("GC_LOOP_ON_ABORT")) {
+ GC_set_and_save_fault_handler(looping_handler);
+ installed_looping_handler = TRUE;
+ }
+ }
+
+#else /* !UNIX_LIKE */
+# define maybe_install_looping_handler()
+#endif
+
+#if !defined(OS2) && !defined(MACOS) && !defined(MSWIN32) && !defined(MSWINCE)
+ STATIC int GC_stdout = 1;
+ STATIC int GC_stderr = 2;
+ STATIC int GC_log = 2; /* stderr */
+#endif
+
+STATIC word GC_parse_mem_size_arg(const char *str)
+{
+ char *endptr;
+ word result = 0; /* bad value */
+ char ch;
+
+ if (*str != '\0') {
+ result = (word)STRTOULL(str, &endptr, 10);
+ ch = *endptr;
+ if (ch != '\0') {
+ if (*(endptr + 1) != '\0')
+ return 0;
+ /* Allow k, M or G suffix. */
+ switch (ch) {
+ case 'K':
+ case 'k':
+ result <<= 10;
+ break;
+ case 'M':
+ case 'm':
+ result <<= 20;
+ break;
+ case 'G':
+ case 'g':
+ result <<= 30;
+ break;
+ default:
+ result = 0;
+ }
+ }
+ }
+ return result;
+}
+
+GC_API void GC_CALL GC_init(void)
+{
+ /* LOCK(); -- no longer does anything this early. */
+ word initial_heap_sz;
+ IF_CANCEL(int cancel_state;)
+
+ if (GC_is_initialized) return;
+# ifdef REDIRECT_MALLOC
+ {
+ static GC_bool init_started = FALSE;
+ if (init_started)
+ ABORT("Redirected malloc() called during GC init");
+ init_started = TRUE;
+ }
+# endif
+
+# ifdef GC_INITIAL_HEAP_SIZE
+ initial_heap_sz = divHBLKSZ(GC_INITIAL_HEAP_SIZE);
+# else
+ initial_heap_sz = (word)MINHINCR;
+# endif
+ DISABLE_CANCEL(cancel_state);
+ /* Note that although we are nominally called with the */
+ /* allocation lock held, the allocation lock is now */
+ /* only really acquired once a second thread is forked.*/
+ /* And the initialization code needs to run before */
+ /* then. Thus we really don't hold any locks, and can */
+ /* in fact safely initialize them here. */
+# ifdef THREADS
+ GC_ASSERT(!GC_need_to_lock);
+# ifdef SN_TARGET_PS3
+ {
+ pthread_mutexattr_t mattr;
+ pthread_mutexattr_init(&mattr);
+ pthread_mutex_init(&GC_allocate_ml, &mattr);
+ pthread_mutexattr_destroy(&mattr);
+ }
+# endif
+# endif /* THREADS */
+# if defined(GC_WIN32_THREADS) && !defined(GC_PTHREADS)
+ {
+# ifndef MSWINCE
+ BOOL (WINAPI *pfn) (LPCRITICAL_SECTION, DWORD) = NULL;
+ HMODULE hK32 = GetModuleHandle(TEXT("kernel32.dll"));
+ if (hK32)
+ pfn = (BOOL (WINAPI *) (LPCRITICAL_SECTION, DWORD))
+ GetProcAddress (hK32,
+ "InitializeCriticalSectionAndSpinCount");
+ if (pfn)
+ pfn(&GC_allocate_ml, 4000);
+ else
+# endif /* !MSWINCE */
+ /* else */ InitializeCriticalSection (&GC_allocate_ml);
+ }
+# endif /* GC_WIN32_THREADS */
+# if (defined(MSWIN32) || defined(MSWINCE)) && defined(THREADS)
+ InitializeCriticalSection(&GC_write_cs);
+# endif
+ GC_setpagesize();
+# ifdef MSWIN32
+ GC_init_win32();
+# endif
+# ifdef GC_READ_ENV_FILE
+ GC_envfile_init();
+# endif
+# ifndef SMALL_CONFIG
+# ifdef GC_PRINT_VERBOSE_STATS
+ /* This is useful for debugging and profiling on platforms with */
+ /* missing getenv() (like WinCE). */
+ GC_print_stats = VERBOSE;
+# else
+ if (0 != GETENV("GC_PRINT_VERBOSE_STATS")) {
+ GC_print_stats = VERBOSE;
+ } else if (0 != GETENV("GC_PRINT_STATS")) {
+ GC_print_stats = 1;
+ }
+# endif
+# if defined(UNIX_LIKE) || defined(CYGWIN32)
+ {
+ char * file_name = GETENV("GC_LOG_FILE");
+ if (0 != file_name) {
+ int log_d = open(file_name, O_CREAT|O_WRONLY|O_APPEND, 0666);
+ if (log_d < 0) {
+ GC_err_printf("Failed to open %s as log file\n", file_name);
+ } else {
+ char *str;
+ GC_log = log_d;
+ str = GETENV("GC_ONLY_LOG_TO_FILE");
+# ifdef GC_ONLY_LOG_TO_FILE
+ /* The similar environment variable set to "0" */
+ /* overrides the effect of the macro defined. */
+ if (str != NULL && *str == '0' && *(str + 1) == '\0')
+# else
+ /* Otherwise setting the environment variable */
+ /* to anything other than "0" will prevent from */
+ /* redirecting stdout/err to the log file. */
+ if (str == NULL || (*str == '0' && *(str + 1) == '\0'))
+# endif
+ {
+ GC_stdout = log_d;
+ GC_stderr = log_d;
+ }
+ }
+ }
+ }
+# endif
+# endif /* !SMALL_CONFIG */
+# ifndef NO_DEBUGGING
+ if (0 != GETENV("GC_DUMP_REGULARLY")) {
+ GC_dump_regularly = TRUE;
+ }
+# endif
+# ifdef KEEP_BACK_PTRS
+ {
+ char * backtraces_string = GETENV("GC_BACKTRACES");
+ if (0 != backtraces_string) {
+ GC_backtraces = atol(backtraces_string);
+ if (backtraces_string[0] == '\0') GC_backtraces = 1;
+ }
+ }
+# endif
+ if (0 != GETENV("GC_FIND_LEAK")) {
+ GC_find_leak = 1;
+ }
+# ifndef SHORT_DBG_HDRS
+ if (0 != GETENV("GC_FINDLEAK_DELAY_FREE")) {
+ GC_findleak_delay_free = TRUE;
+ }
+# endif
+ if (0 != GETENV("GC_ALL_INTERIOR_POINTERS")) {
+ GC_all_interior_pointers = 1;
+ }
+ if (0 != GETENV("GC_DONT_GC")) {
+ GC_dont_gc = 1;
+ }
+ if (0 != GETENV("GC_PRINT_BACK_HEIGHT")) {
+ GC_print_back_height = TRUE;
+ }
+ if (0 != GETENV("GC_NO_BLACKLIST_WARNING")) {
+ GC_large_alloc_warn_interval = LONG_MAX;
+ }
+ {
+ char * addr_string = GETENV("GC_TRACE");
+ if (0 != addr_string) {
+# ifndef ENABLE_TRACE
+ WARN("Tracing not enabled: Ignoring GC_TRACE value\n", 0);
+# else
+ word addr = (word)STRTOULL(addr_string, NULL, 16);
+ if (addr < 0x1000)
+ WARN("Unlikely trace address: %p\n", addr);
+ GC_trace_addr = (ptr_t)addr;
+# endif
+ }
+ }
+# ifndef GC_DISABLE_INCREMENTAL
+ {
+ char * time_limit_string = GETENV("GC_PAUSE_TIME_TARGET");
+ if (0 != time_limit_string) {
+ long time_limit = atol(time_limit_string);
+ if (time_limit < 5) {
+ WARN("GC_PAUSE_TIME_TARGET environment variable value too small "
+ "or bad syntax: Ignoring\n", 0);
+ } else {
+ GC_time_limit = time_limit;
+ }
+ }
+ }
+# endif
+# ifndef SMALL_CONFIG
+ {
+ char * full_freq_string = GETENV("GC_FULL_FREQUENCY");
+ if (full_freq_string != NULL) {
+ int full_freq = atoi(full_freq_string);
+ if (full_freq > 0)
+ GC_full_freq = full_freq;
+ }
+ }
+# endif
+ {
+ char * interval_string = GETENV("GC_LARGE_ALLOC_WARN_INTERVAL");
+ if (0 != interval_string) {
+ long interval = atol(interval_string);
+ if (interval <= 0) {
+ WARN("GC_LARGE_ALLOC_WARN_INTERVAL environment variable has "
+ "bad value: Ignoring\n", 0);
+ } else {
+ GC_large_alloc_warn_interval = interval;
+ }
+ }
+ }
+ {
+ char * space_divisor_string = GETENV("GC_FREE_SPACE_DIVISOR");
+ if (space_divisor_string != NULL) {
+ int space_divisor = atoi(space_divisor_string);
+ if (space_divisor > 0)
+ GC_free_space_divisor = (GC_word)space_divisor;
+ }
+ }
+# ifdef USE_MUNMAP
+ {
+ char * string = GETENV("GC_UNMAP_THRESHOLD");
+ if (string != NULL) {
+ if (*string == '0' && *(string + 1) == '\0') {
+ /* "0" is used to disable unmapping. */
+ GC_unmap_threshold = 0;
+ } else {
+ int unmap_threshold = atoi(string);
+ if (unmap_threshold > 0)
+ GC_unmap_threshold = unmap_threshold;
+ }
+ }
+ }
+ {
+ char * string = GETENV("GC_FORCE_UNMAP_ON_GCOLLECT");
+ if (string != NULL) {
+ if (*string == '0' && *(string + 1) == '\0') {
+ /* "0" is used to turn off the mode. */
+ GC_force_unmap_on_gcollect = FALSE;
+ } else {
+ GC_force_unmap_on_gcollect = TRUE;
+ }
+ }
+ }
+ {
+ char * string = GETENV("GC_USE_ENTIRE_HEAP");
+ if (string != NULL) {
+ if (*string == '0' && *(string + 1) == '\0') {
+ /* "0" is used to turn off the mode. */
+ GC_use_entire_heap = FALSE;
+ } else {
+ GC_use_entire_heap = TRUE;
+ }
+ }
+ }
+# endif
+ maybe_install_looping_handler();
+ /* Adjust normal object descriptor for extra allocation. */
+ if (ALIGNMENT > GC_DS_TAGS && EXTRA_BYTES != 0) {
+ GC_obj_kinds[NORMAL].ok_descriptor = ((word)(-ALIGNMENT) | GC_DS_LENGTH);
+ }
+ GC_exclude_static_roots_inner(beginGC_arrays, endGC_arrays);
+ GC_exclude_static_roots_inner(beginGC_obj_kinds, endGC_obj_kinds);
+# ifdef SEPARATE_GLOBALS
+ GC_exclude_static_roots_inner(beginGC_objfreelist, endGC_objfreelist);
+ GC_exclude_static_roots_inner(beginGC_aobjfreelist, endGC_aobjfreelist);
+# endif
+# if defined(USE_PROC_FOR_LIBRARIES) && defined(GC_LINUX_THREADS)
+ WARN("USE_PROC_FOR_LIBRARIES + GC_LINUX_THREADS performs poorly.\n", 0);
+ /* If thread stacks are cached, they tend to be scanned in */
+ /* entirety as part of the root set. This wil grow them to */
+ /* maximum size, and is generally not desirable. */
+# endif
+# if defined(SEARCH_FOR_DATA_START)
+ GC_init_linux_data_start();
+# endif
+# if defined(NETBSD) && defined(__ELF__)
+ GC_init_netbsd_elf();
+# endif
+# if !defined(THREADS) || defined(GC_PTHREADS) \
+ || defined(GC_WIN32_THREADS) || defined(GC_SOLARIS_THREADS)
+ if (GC_stackbottom == 0) {
+ GC_stackbottom = GC_get_main_stack_base();
+# if (defined(LINUX) || defined(HPUX)) && defined(IA64)
+ GC_register_stackbottom = GC_get_register_stack_base();
+# endif
+ } else {
+# if (defined(LINUX) || defined(HPUX)) && defined(IA64)
+ if (GC_register_stackbottom == 0) {
+ WARN("GC_register_stackbottom should be set with GC_stackbottom\n", 0);
+ /* The following may fail, since we may rely on */
+ /* alignment properties that may not hold with a user set */
+ /* GC_stackbottom. */
+ GC_register_stackbottom = GC_get_register_stack_base();
+ }
+# endif
+ }
+# endif
+ GC_STATIC_ASSERT(sizeof (ptr_t) == sizeof(word));
+ GC_STATIC_ASSERT(sizeof (signed_word) == sizeof(word));
+ GC_STATIC_ASSERT(sizeof (struct hblk) == HBLKSIZE);
+# ifndef THREADS
+ GC_ASSERT(!((word)GC_stackbottom HOTTER_THAN (word)GC_approx_sp()));
+# endif
+# if !defined(_AUX_SOURCE) || defined(__GNUC__)
+ GC_STATIC_ASSERT((word)(-1) > (word)0);
+ /* word should be unsigned */
+# endif
+# if !defined(__BORLANDC__) && !defined(__CC_ARM) \
+ && !(defined(__clang__) && defined(X86_64)) /* Workaround */
+ GC_STATIC_ASSERT((ptr_t)(word)(-1) > (ptr_t)0);
+ /* Ptr_t comparisons should behave as unsigned comparisons. */
+# endif
+ GC_STATIC_ASSERT((signed_word)(-1) < (signed_word)0);
+# ifndef GC_DISABLE_INCREMENTAL
+ if (GC_incremental || 0 != GETENV("GC_ENABLE_INCREMENTAL")) {
+ /* For GWW_VDB on Win32, this needs to happen before any */
+ /* heap memory is allocated. */
+ GC_dirty_init();
+ GC_ASSERT(GC_bytes_allocd == 0);
+ GC_incremental = TRUE;
+ }
+# endif
+
+ /* Add initial guess of root sets. Do this first, since sbrk(0) */
+ /* might be used. */
+ if (GC_REGISTER_MAIN_STATIC_DATA()) GC_register_data_segments();
+ GC_init_headers();
+ GC_bl_init();
+ GC_mark_init();
+ {
+ char * sz_str = GETENV("GC_INITIAL_HEAP_SIZE");
+ if (sz_str != NULL) {
+ initial_heap_sz = GC_parse_mem_size_arg(sz_str);
+ if (initial_heap_sz <= MINHINCR * HBLKSIZE) {
+ WARN("Bad initial heap size %s - ignoring it.\n", sz_str);
+ }
+ initial_heap_sz = divHBLKSZ(initial_heap_sz);
+ }
+ }
+ {
+ char * sz_str = GETENV("GC_MAXIMUM_HEAP_SIZE");
+ if (sz_str != NULL) {
+ word max_heap_sz = GC_parse_mem_size_arg(sz_str);
+ if (max_heap_sz < initial_heap_sz * HBLKSIZE) {
+ WARN("Bad maximum heap size %s - ignoring it.\n", sz_str);
+ }
+ if (0 == GC_max_retries) GC_max_retries = 2;
+ GC_set_max_heap_size(max_heap_sz);
+ }
+ }
+ if (!GC_expand_hp_inner(initial_heap_sz)) {
+ GC_err_printf("Can't start up: not enough memory\n");
+ EXIT();
+ }
+ if (GC_all_interior_pointers)
+ GC_initialize_offsets();
+ GC_register_displacement_inner(0L);
+# if defined(GC_LINUX_THREADS) && defined(REDIRECT_MALLOC)
+ if (!GC_all_interior_pointers) {
+ /* TLS ABI uses pointer-sized offsets for dtv. */
+ GC_register_displacement_inner(sizeof(void *));
+ }
+# endif
+ GC_init_size_map();
+# ifdef PCR
+ if (PCR_IL_Lock(PCR_Bool_false, PCR_allSigsBlocked, PCR_waitForever)
+ != PCR_ERes_okay) {
+ ABORT("Can't lock load state");
+ } else if (PCR_IL_Unlock() != PCR_ERes_okay) {
+ ABORT("Can't unlock load state");
+ }
+ PCR_IL_Unlock();
+ GC_pcr_install();
+# endif
+ GC_is_initialized = TRUE;
+# if defined(GC_PTHREADS) || defined(GC_WIN32_THREADS)
+ GC_thr_init();
+# endif
+ COND_DUMP;
+ /* Get black list set up and/or incremental GC started */
+ if (!GC_dont_precollect || GC_incremental) GC_gcollect_inner();
+# ifdef STUBBORN_ALLOC
+ GC_stubborn_init();
+# endif
+ /* Convince lint that some things are used */
+# ifdef LINT
+ {
+ extern char * const GC_copyright[];
+ GC_noop(GC_copyright, GC_find_header, GC_push_one,
+ GC_call_with_alloc_lock, GC_dont_expand,
+# ifndef NO_DEBUGGING
+ GC_dump,
+# endif
+ GC_register_finalizer_no_order);
+ }
+# endif
+
+ if (GC_find_leak) {
+ /* This is to give us at least one chance to detect leaks. */
+ /* This may report some very benign leaks, but ... */
+ atexit(GC_exit_check);
+ }
+
+ /* The rest of this again assumes we don't really hold */
+ /* the allocation lock. */
+# if defined(PARALLEL_MARK) || defined(THREAD_LOCAL_ALLOC)
+ /* Make sure marker threads are started and thread local */
+ /* allocation is initialized, in case we didn't get */
+ /* called from GC_init_parallel. */
+ GC_init_parallel();
+# endif /* PARALLEL_MARK || THREAD_LOCAL_ALLOC */
+
+# if defined(DYNAMIC_LOADING) && defined(DARWIN)
+ /* This must be called WITHOUT the allocation lock held */
+ /* and before any threads are created. */
+ GC_init_dyld();
+# endif
+ RESTORE_CANCEL(cancel_state);
+}
+
+GC_API void GC_CALL GC_enable_incremental(void)
+{
+# if !defined(GC_DISABLE_INCREMENTAL) && !defined(KEEP_BACK_PTRS)
+ DCL_LOCK_STATE;
+ /* If we are keeping back pointers, the GC itself dirties all */
+ /* pages on which objects have been marked, making */
+ /* incremental GC pointless. */
+ if (!GC_find_leak && 0 == GETENV("GC_DISABLE_INCREMENTAL")) {
+ LOCK();
+ if (!GC_incremental) {
+ GC_setpagesize();
+ /* if (GC_no_win32_dlls) goto out; Should be win32S test? */
+ maybe_install_looping_handler(); /* Before write fault handler! */
+ GC_incremental = TRUE;
+ if (!GC_is_initialized) {
+ GC_init();
+ } else {
+ GC_dirty_init();
+ }
+ if (GC_dirty_maintained && !GC_dont_gc) {
+ /* Can't easily do it if GC_dont_gc. */
+ if (GC_bytes_allocd > 0) {
+ /* There may be unmarked reachable objects. */
+ GC_gcollect_inner();
+ }
+ /* else we're OK in assuming everything's */
+ /* clean since nothing can point to an */
+ /* unmarked object. */
+ GC_read_dirty();
+ }
+ }
+ UNLOCK();
+ return;
+ }
+# endif
+ GC_init();
+}
+
+#if defined(MSWIN32) || defined(MSWINCE)
+
+# if defined(_MSC_VER) && defined(_DEBUG) && !defined(MSWINCE)
+# include <crtdbg.h>
+# endif
+
+ STATIC HANDLE GC_log = 0;
+
+ void GC_deinit(void)
+ {
+# ifdef THREADS
+ if (GC_is_initialized) {
+ DeleteCriticalSection(&GC_write_cs);
+ }
+# endif
+ }
+
+# ifdef THREADS
+# ifdef PARALLEL_MARK
+# define IF_NEED_TO_LOCK(x) if (GC_parallel || GC_need_to_lock) x
+# else
+# define IF_NEED_TO_LOCK(x) if (GC_need_to_lock) x
+# endif
+# else
+# define IF_NEED_TO_LOCK(x)
+# endif /* !THREADS */
+
+ STATIC HANDLE GC_CreateLogFile(void)
+ {
+# if !defined(NO_GETENV_WIN32) || !defined(OLD_WIN32_LOG_FILE)
+ TCHAR logPath[_MAX_PATH + 0x10]; /* buffer for path + ext */
+# endif
+ /* Use GetEnvironmentVariable instead of GETENV() for unicode support. */
+# ifndef NO_GETENV_WIN32
+ if (GetEnvironmentVariable(TEXT("GC_LOG_FILE"), logPath,
+ _MAX_PATH + 1) - 1U >= (DWORD)_MAX_PATH)
+# endif
+ {
+ /* Env var not found or its value too long. */
+# ifdef OLD_WIN32_LOG_FILE
+ return CreateFile(TEXT("gc.log"), GENERIC_WRITE, FILE_SHARE_READ,
+ NULL /* lpSecurityAttributes */, CREATE_ALWAYS,
+ FILE_FLAG_WRITE_THROUGH, NULL /* hTemplateFile */);
+# else
+ int len = (int)GetModuleFileName(NULL /* hModule */, logPath,
+ _MAX_PATH + 1);
+ /* If GetModuleFileName() has failed then len is 0. */
+ if (len > 4 && logPath[len - 4] == (TCHAR)'.') {
+ len -= 4; /* strip executable file extension */
+ }
+ /* strcat/wcscat() are deprecated on WinCE, so use memcpy() */
+ memcpy(&logPath[len], TEXT(".gc.log"), sizeof(TEXT(".gc.log")));
+# endif
+ }
+# if !defined(NO_GETENV_WIN32) || !defined(OLD_WIN32_LOG_FILE)
+ return CreateFile(logPath, GENERIC_WRITE, FILE_SHARE_READ,
+ NULL /* lpSecurityAttributes */, CREATE_ALWAYS,
+ GC_print_stats == VERBOSE ? FILE_ATTRIBUTE_NORMAL :
+ /* immediately flush writes unless very verbose */
+ FILE_ATTRIBUTE_NORMAL | FILE_FLAG_WRITE_THROUGH,
+ NULL /* hTemplateFile */);
+# endif
+ }
+
+ STATIC int GC_write(const char *buf, size_t len)
+ {
+ BOOL tmp;
+ DWORD written;
+ if (len == 0)
+ return 0;
+ IF_NEED_TO_LOCK(EnterCriticalSection(&GC_write_cs));
+# ifdef THREADS
+ GC_ASSERT(!GC_write_disabled);
+# endif
+ if (GC_log == INVALID_HANDLE_VALUE) {
+ IF_NEED_TO_LOCK(LeaveCriticalSection(&GC_write_cs));
+ return -1;
+ } else if (GC_log == 0) {
+ GC_log = GC_CreateLogFile();
+ /* Ignore open log failure if the collector is built with */
+ /* print_stats always set on. */
+# ifndef GC_PRINT_VERBOSE_STATS
+ if (GC_log == INVALID_HANDLE_VALUE)
+ ABORT("Open of log file failed");
+# endif
+ }
+ tmp = WriteFile(GC_log, buf, (DWORD)len, &written, NULL);
+ if (!tmp)
+ DebugBreak();
+# if defined(_MSC_VER) && defined(_DEBUG)
+# ifdef MSWINCE
+ /* There is no CrtDbgReport() in WinCE */
+ {
+ WCHAR wbuf[1024];
+ /* Always use Unicode variant of OutputDebugString() */
+ wbuf[MultiByteToWideChar(CP_ACP, 0 /* dwFlags */,
+ buf, len, wbuf,
+ sizeof(wbuf) / sizeof(wbuf[0]) - 1)] = 0;
+ OutputDebugStringW(wbuf);
+ }
+# else
+ _CrtDbgReport(_CRT_WARN, NULL, 0, NULL, "%.*s", len, buf);
+# endif
+# endif
+ IF_NEED_TO_LOCK(LeaveCriticalSection(&GC_write_cs));
+ return tmp ? (int)written : -1;
+ }
+
+ /* FIXME: This is pretty ugly ... */
+# define WRITE(f, buf, len) GC_write(buf, len)
+
+#elif defined(OS2) || defined(MACOS)
+ STATIC FILE * GC_stdout = NULL;
+ STATIC FILE * GC_stderr = NULL;
+ STATIC FILE * GC_log = NULL;
+
+ /* Initialize GC_log (and the friends) passed to GC_write(). */
+ STATIC void GC_set_files(void)
+ {
+ if (GC_stdout == NULL) {
+ GC_stdout = stdout;
+ }
+ if (GC_stderr == NULL) {
+ GC_stderr = stderr;
+ }
+ if (GC_log == NULL) {
+ GC_log = stderr;
+ }
+ }
+
+ GC_INLINE int GC_write(FILE *f, const char *buf, size_t len)
+ {
+ int res = fwrite(buf, 1, len, f);
+ fflush(f);
+ return res;
+ }
+
+# define WRITE(f, buf, len) (GC_set_files(), GC_write(f, buf, len))
+
+#else
+# if !defined(AMIGA) && !defined(__CC_ARM)
+# include <unistd.h>
+# endif
+
+ STATIC int GC_write(int fd, const char *buf, size_t len)
+ {
+# if defined(ECOS) || defined(NOSYS)
+# ifdef ECOS
+ /* FIXME: This seems to be defined nowhere at present. */
+ /* _Jv_diag_write(buf, len); */
+# else
+ /* No writing. */
+# endif
+ return len;
+# else
+ int bytes_written = 0;
+ int result;
+ IF_CANCEL(int cancel_state;)
+
+ DISABLE_CANCEL(cancel_state);
+ while ((size_t)bytes_written < len) {
+# ifdef GC_SOLARIS_THREADS
+ result = syscall(SYS_write, fd, buf + bytes_written,
+ len - bytes_written);
+# else
+ result = write(fd, buf + bytes_written, len - bytes_written);
+# endif
+ if (-1 == result) {
+ RESTORE_CANCEL(cancel_state);
+ return(result);
+ }
+ bytes_written += result;
+ }
+ RESTORE_CANCEL(cancel_state);
+ return(bytes_written);
+# endif
+ }
+
+# define WRITE(f, buf, len) GC_write(f, buf, len)
+#endif /* !MSWIN32 && !OS2 && !MACOS */
+
+#define BUFSZ 1024
+
+#ifdef NO_VSNPRINTF
+ /* In case this function is missing (eg., in DJGPP v2.0.3). */
+# define vsnprintf(buf, bufsz, format, args) vsprintf(buf, format, args)
+#elif defined(_MSC_VER)
+# ifdef MSWINCE
+ /* _vsnprintf is deprecated in WinCE */
+# define vsnprintf StringCchVPrintfA
+# else
+# define vsnprintf _vsnprintf
+# endif
+#endif
+/* A version of printf that is unlikely to call malloc, and is thus safer */
+/* to call from the collector in case malloc has been bound to GC_malloc. */
+/* Floating point arguments and formats should be avoided, since fp */
+/* conversion is more likely to allocate. */
+/* Assumes that no more than BUFSZ-1 characters are written at once. */
+void GC_printf(const char *format, ...)
+{
+ va_list args;
+ char buf[BUFSZ+1];
+
+ if (GC_quiet) return;
+ va_start(args, format);
+ buf[BUFSZ] = 0x15;
+ (void) vsnprintf(buf, BUFSZ, format, args);
+ va_end(args);
+ if (buf[BUFSZ] != 0x15) ABORT("GC_printf clobbered stack");
+ if (WRITE(GC_stdout, buf, strlen(buf)) < 0)
+ ABORT("write to stdout failed");
+}
+
+void GC_err_printf(const char *format, ...)
+{
+ va_list args;
+ char buf[BUFSZ+1];
+
+ va_start(args, format);
+ buf[BUFSZ] = 0x15;
+ (void) vsnprintf(buf, BUFSZ, format, args);
+ va_end(args);
+ if (buf[BUFSZ] != 0x15) ABORT("GC_printf clobbered stack");
+ if (WRITE(GC_stderr, buf, strlen(buf)) < 0)
+ ABORT("write to stderr failed");
+}
+
+void GC_log_printf(const char *format, ...)
+{
+ va_list args;
+ char buf[BUFSZ+1];
+
+ va_start(args, format);
+ buf[BUFSZ] = 0x15;
+ (void) vsnprintf(buf, BUFSZ, format, args);
+ va_end(args);
+ if (buf[BUFSZ] != 0x15) ABORT("GC_printf clobbered stack");
+ if (WRITE(GC_log, buf, strlen(buf)) < 0)
+ ABORT("write to log failed");
+}
+
+/* This is equivalent to GC_err_printf("%s",s). */
+void GC_err_puts(const char *s)
+{
+ if (WRITE(GC_stderr, s, strlen(s)) < 0) ABORT("write to stderr failed");
+}
+
+STATIC void GC_CALLBACK GC_default_warn_proc(char *msg, GC_word arg)
+{
+ GC_err_printf(msg, arg);
+}
+
+GC_INNER GC_warn_proc GC_current_warn_proc = GC_default_warn_proc;
+
+/* This is recommended for production code (release). */
+GC_API void GC_CALLBACK GC_ignore_warn_proc(char *msg, GC_word arg)
+{
+ if (GC_print_stats) {
+ /* Don't ignore warnings if stats printing is on. */
+ GC_default_warn_proc(msg, arg);
+ }
+}
+
+GC_API void GC_CALL GC_set_warn_proc(GC_warn_proc p)
+{
+ DCL_LOCK_STATE;
+ GC_ASSERT(p != 0);
+# ifdef GC_WIN32_THREADS
+# ifdef CYGWIN32
+ /* Need explicit GC_INIT call */
+ GC_ASSERT(GC_is_initialized);
+# else
+ if (!GC_is_initialized) GC_init();
+# endif
+# endif
+ LOCK();
+ GC_current_warn_proc = p;
+ UNLOCK();
+}
+
+GC_API GC_warn_proc GC_CALL GC_get_warn_proc(void)
+{
+ GC_warn_proc result;
+ DCL_LOCK_STATE;
+ LOCK();
+ result = GC_current_warn_proc;
+ UNLOCK();
+ return(result);
+}
+
+#if !defined(PCR) && !defined(SMALL_CONFIG)
+ /* Abort the program with a message. msg must not be NULL. */
+ void GC_abort(const char *msg)
+ {
+# if defined(MSWIN32)
+# ifndef DONT_USE_USER32_DLL
+ /* Use static binding to "user32.dll". */
+ (void)MessageBoxA(NULL, msg, "Fatal error in GC", MB_ICONERROR|MB_OK);
+# else
+ /* This simplifies linking - resolve "MessageBoxA" at run-time. */
+ HINSTANCE hU32 = LoadLibrary(TEXT("user32.dll"));
+ if (hU32) {
+ FARPROC pfn = GetProcAddress(hU32, "MessageBoxA");
+ if (pfn)
+ (void)(*(int (WINAPI *)(HWND, LPCSTR, LPCSTR, UINT))pfn)(
+ NULL /* hWnd */, msg, "Fatal error in GC",
+ MB_ICONERROR | MB_OK);
+ (void)FreeLibrary(hU32);
+ }
+# endif
+ /* Also duplicate msg to GC log file. */
+# endif
+ /* Avoid calling GC_err_printf() here, as GC_abort() could be */
+ /* called from it. Note 1: this is not an atomic output. */
+ /* Note 2: possible write errors are ignored. */
+ if (WRITE(GC_stderr, (void *)msg, strlen(msg)) >= 0)
+ (void)WRITE(GC_stderr, (void *)("\n"), 1);
+
+ if (GETENV("GC_LOOP_ON_ABORT") != NULL) {
+ /* In many cases it's easier to debug a running process. */
+ /* It's arguably nicer to sleep, but that makes it harder */
+ /* to look at the thread if the debugger doesn't know much */
+ /* about threads. */
+ for(;;) {}
+ }
+# ifndef LINT2
+ if (!msg) return; /* to suppress compiler warnings in ABORT callers. */
+# endif
+# if defined(MSWIN32) && (defined(NO_DEBUGGING) || defined(LINT2))
+ /* A more user-friendly abort after showing fatal message. */
+ _exit(-1); /* exit on error without running "at-exit" callbacks */
+# elif defined(MSWINCE) && defined(NO_DEBUGGING)
+ ExitProcess(-1);
+# elif defined(MSWIN32) || defined(MSWINCE)
+ DebugBreak();
+ /* Note that on a WinCE box, this could be silently */
+ /* ignored (i.e., the program is not aborted). */
+# else
+ (void) abort();
+# endif
+ }
+#endif /* !SMALL_CONFIG */
+
+GC_API void GC_CALL GC_enable(void)
+{
+ DCL_LOCK_STATE;
+ LOCK();
+ GC_dont_gc--;
+ UNLOCK();
+}
+
+GC_API void GC_CALL GC_disable(void)
+{
+ DCL_LOCK_STATE;
+ LOCK();
+ GC_dont_gc++;
+ UNLOCK();
+}
+
+GC_API int GC_CALL GC_is_disabled(void)
+{
+ return GC_dont_gc != 0;
+}
+
+/* Helper procedures for new kind creation. */
+GC_API void ** GC_CALL GC_new_free_list_inner(void)
+{
+ void *result = GC_INTERNAL_MALLOC((MAXOBJGRANULES+1)*sizeof(ptr_t),
+ PTRFREE);
+ if (result == 0) ABORT("Failed to allocate freelist for new kind");
+ BZERO(result, (MAXOBJGRANULES+1)*sizeof(ptr_t));
+ return result;
+}
+
+GC_API void ** GC_CALL GC_new_free_list(void)
+{
+ void *result;
+ DCL_LOCK_STATE;
+ LOCK();
+ result = GC_new_free_list_inner();
+ UNLOCK();
+ return result;
+}
+
+GC_API unsigned GC_CALL GC_new_kind_inner(void **fl, GC_word descr,
+ int adjust, int clear)
+{
+ unsigned result = GC_n_kinds++;
+
+ if (GC_n_kinds > MAXOBJKINDS) ABORT("Too many kinds");
+ GC_obj_kinds[result].ok_freelist = fl;
+ GC_obj_kinds[result].ok_reclaim_list = 0;
+ GC_obj_kinds[result].ok_descriptor = descr;
+ GC_obj_kinds[result].ok_relocate_descr = adjust;
+ GC_obj_kinds[result].ok_init = clear;
+ return result;
+}
+
+GC_API unsigned GC_CALL GC_new_kind(void **fl, GC_word descr, int adjust,
+ int clear)
+{
+ unsigned result;
+ DCL_LOCK_STATE;
+ LOCK();
+ result = GC_new_kind_inner(fl, descr, adjust, clear);
+ UNLOCK();
+ return result;
+}
+
+GC_API unsigned GC_CALL GC_new_proc_inner(GC_mark_proc proc)
+{
+ unsigned result = GC_n_mark_procs++;
+
+ if (GC_n_mark_procs > MAX_MARK_PROCS) ABORT("Too many mark procedures");
+ GC_mark_procs[result] = proc;
+ return result;
+}
+
+GC_API unsigned GC_CALL GC_new_proc(GC_mark_proc proc)
+{
+ unsigned result;
+ DCL_LOCK_STATE;
+ LOCK();
+ result = GC_new_proc_inner(proc);
+ UNLOCK();
+ return result;
+}
+
+GC_API void * GC_CALL GC_call_with_stack_base(GC_stack_base_func fn, void *arg)
+{
+ struct GC_stack_base base;
+ void *result;
+
+ base.mem_base = (void *)&base;
+# ifdef IA64
+ base.reg_base = (void *)GC_save_regs_in_stack();
+ /* Unnecessarily flushes register stack, */
+ /* but that probably doesn't hurt. */
+# endif
+ result = fn(&base, arg);
+ /* Strongly discourage the compiler from treating the above */
+ /* as a tail call. */
+ GC_noop1((word)(&base));
+ return result;
+}
+
+#ifndef THREADS
+
+GC_INNER ptr_t GC_blocked_sp = NULL;
+ /* NULL value means we are not inside GC_do_blocking() call. */
+# ifdef IA64
+ STATIC ptr_t GC_blocked_register_sp = NULL;
+# endif
+
+GC_INNER struct GC_traced_stack_sect_s *GC_traced_stack_sect = NULL;
+
+/* This is nearly the same as in win32_threads.c */
+GC_API void * GC_CALL GC_call_with_gc_active(GC_fn_type fn,
+ void * client_data)
+{
+ struct GC_traced_stack_sect_s stacksect;
+ GC_ASSERT(GC_is_initialized);
+
+ /* Adjust our stack base value (this could happen if */
+ /* GC_get_main_stack_base() is unimplemented or broken for */
+ /* the platform). */
+ if (GC_stackbottom HOTTER_THAN (ptr_t)(&stacksect))
+ GC_stackbottom = (ptr_t)(&stacksect);
+
+ if (GC_blocked_sp == NULL) {
+ /* We are not inside GC_do_blocking() - do nothing more. */
+ return fn(client_data);
+ }
+
+ /* Setup new "stack section". */
+ stacksect.saved_stack_ptr = GC_blocked_sp;
+# ifdef IA64
+ /* This is the same as in GC_call_with_stack_base(). */
+ stacksect.backing_store_end = GC_save_regs_in_stack();
+ /* Unnecessarily flushes register stack, */
+ /* but that probably doesn't hurt. */
+ stacksect.saved_backing_store_ptr = GC_blocked_register_sp;
+# endif
+ stacksect.prev = GC_traced_stack_sect;
+ GC_blocked_sp = NULL;
+ GC_traced_stack_sect = &stacksect;
+
+ client_data = fn(client_data);
+ GC_ASSERT(GC_blocked_sp == NULL);
+ GC_ASSERT(GC_traced_stack_sect == &stacksect);
+
+ /* Restore original "stack section". */
+ GC_traced_stack_sect = stacksect.prev;
+# ifdef IA64
+ GC_blocked_register_sp = stacksect.saved_backing_store_ptr;
+# endif
+ GC_blocked_sp = stacksect.saved_stack_ptr;
+
+ return client_data; /* result */
+}
+
+/* This is nearly the same as in win32_threads.c */
+/*ARGSUSED*/
+STATIC void GC_do_blocking_inner(ptr_t data, void * context)
+{
+ struct blocking_data * d = (struct blocking_data *) data;
+ GC_ASSERT(GC_is_initialized);
+ GC_ASSERT(GC_blocked_sp == NULL);
+# ifdef SPARC
+ GC_blocked_sp = GC_save_regs_in_stack();
+# else
+ GC_blocked_sp = (ptr_t) &d; /* save approx. sp */
+# endif
+# ifdef IA64
+ GC_blocked_register_sp = GC_save_regs_in_stack();
+# endif
+
+ d -> client_data = (d -> fn)(d -> client_data);
+
+# ifdef SPARC
+ GC_ASSERT(GC_blocked_sp != NULL);
+# else
+ GC_ASSERT(GC_blocked_sp == (ptr_t) &d);
+# endif
+ GC_blocked_sp = NULL;
+}
+
+#endif /* !THREADS */
+
+/* Wrapper for functions that are likely to block (or, at least, do not */
+/* allocate garbage collected memory and/or manipulate pointers to the */
+/* garbage collected heap) for an appreciable length of time. */
+/* In the single threaded case, GC_do_blocking() (together */
+/* with GC_call_with_gc_active()) might be used to make stack scanning */
+/* more precise (i.e. scan only stack frames of functions that allocate */
+/* garbage collected memory and/or manipulate pointers to the garbage */
+/* collected heap). */
+GC_API void * GC_CALL GC_do_blocking(GC_fn_type fn, void * client_data)
+{
+ struct blocking_data my_data;
+
+ my_data.fn = fn;
+ my_data.client_data = client_data;
+ GC_with_callee_saves_pushed(GC_do_blocking_inner, (ptr_t)(&my_data));
+ return my_data.client_data; /* result */
+}
+
+#if !defined(NO_DEBUGGING)
+ GC_API void GC_CALL GC_dump(void)
+ {
+ GC_printf("***Static roots:\n");
+ GC_print_static_roots();
+ GC_printf("\n***Heap sections:\n");
+ GC_print_heap_sects();
+ GC_printf("\n***Free blocks:\n");
+ GC_print_hblkfreelist();
+ GC_printf("\n***Blocks in use:\n");
+ GC_print_block_list();
+ }
+#endif /* !NO_DEBUGGING */
+
+/* Getter functions for the public Read-only variables. */
+
+/* GC_get_gc_no() is unsynchronized and should be typically called */
+/* inside the context of GC_call_with_alloc_lock() to prevent data */
+/* races (on multiprocessors). */
+GC_API GC_word GC_CALL GC_get_gc_no(void)
+{
+ return GC_gc_no;
+}
+
+#ifdef THREADS
+ GC_API int GC_CALL GC_get_parallel(void)
+ {
+ /* GC_parallel is initialized at start-up. */
+ return GC_parallel;
+ }
+#endif
+
+/* Setter and getter functions for the public R/W function variables. */
+/* These functions are synchronized (like GC_set_warn_proc() and */
+/* GC_get_warn_proc()). */
+
+GC_API void GC_CALL GC_set_oom_fn(GC_oom_func fn)
+{
+ GC_ASSERT(fn != 0);
+ DCL_LOCK_STATE;
+ LOCK();
+ GC_oom_fn = fn;
+ UNLOCK();
+}
+
+GC_API GC_oom_func GC_CALL GC_get_oom_fn(void)
+{
+ GC_oom_func fn;
+ DCL_LOCK_STATE;
+ LOCK();
+ fn = GC_oom_fn;
+ UNLOCK();
+ return fn;
+}
+
+GC_API void GC_CALL GC_set_finalizer_notifier(GC_finalizer_notifier_proc fn)
+{
+ /* fn may be 0 (means no finalizer notifier). */
+ DCL_LOCK_STATE;
+ LOCK();
+ GC_finalizer_notifier = fn;
+ UNLOCK();
+}
+
+GC_API GC_finalizer_notifier_proc GC_CALL GC_get_finalizer_notifier(void)
+{
+ GC_finalizer_notifier_proc fn;
+ DCL_LOCK_STATE;
+ LOCK();
+ fn = GC_finalizer_notifier;
+ UNLOCK();
+ return fn;
+}
+
+/* Setter and getter functions for the public numeric R/W variables. */
+/* It is safe to call these functions even before GC_INIT(). */
+/* These functions are unsynchronized and should be typically called */
+/* inside the context of GC_call_with_alloc_lock() (if called after */
+/* GC_INIT()) to prevent data races (unless it is guaranteed the */
+/* collector is not multi-threaded at that execution point). */
+
+GC_API void GC_CALL GC_set_find_leak(int value)
+{
+ /* value is of boolean type. */
+ GC_find_leak = value;
+}
+
+GC_API int GC_CALL GC_get_find_leak(void)
+{
+ return GC_find_leak;
+}
+
+GC_API void GC_CALL GC_set_all_interior_pointers(int value)
+{
+ DCL_LOCK_STATE;
+
+ GC_all_interior_pointers = value ? 1 : 0;
+ if (GC_is_initialized) {
+ /* It is not recommended to change GC_all_interior_pointers value */
+ /* after GC is initialized but it seems GC could work correctly */
+ /* even after switching the mode. */
+ LOCK();
+ GC_initialize_offsets(); /* NOTE: this resets manual offsets as well */
+ if (!GC_all_interior_pointers)
+ GC_bl_init_no_interiors();
+ UNLOCK();
+ }
+}
+
+GC_API int GC_CALL GC_get_all_interior_pointers(void)
+{
+ return GC_all_interior_pointers;
+}
+
+GC_API void GC_CALL GC_set_finalize_on_demand(int value)
+{
+ GC_ASSERT(value != -1);
+ /* value is of boolean type. */
+ GC_finalize_on_demand = value;
+}
+
+GC_API int GC_CALL GC_get_finalize_on_demand(void)
+{
+ return GC_finalize_on_demand;
+}
+
+GC_API void GC_CALL GC_set_java_finalization(int value)
+{
+ GC_ASSERT(value != -1);
+ /* value is of boolean type. */
+ GC_java_finalization = value;
+}
+
+GC_API int GC_CALL GC_get_java_finalization(void)
+{
+ return GC_java_finalization;
+}
+
+GC_API void GC_CALL GC_set_dont_expand(int value)
+{
+ GC_ASSERT(value != -1);
+ /* value is of boolean type. */
+ GC_dont_expand = value;
+}
+
+GC_API int GC_CALL GC_get_dont_expand(void)
+{
+ return GC_dont_expand;
+}
+
+GC_API void GC_CALL GC_set_no_dls(int value)
+{
+ GC_ASSERT(value != -1);
+ /* value is of boolean type. */
+ GC_no_dls = value;
+}
+
+GC_API int GC_CALL GC_get_no_dls(void)
+{
+ return GC_no_dls;
+}
+
+GC_API void GC_CALL GC_set_non_gc_bytes(GC_word value)
+{
+ GC_non_gc_bytes = value;
+}
+
+GC_API GC_word GC_CALL GC_get_non_gc_bytes(void)
+{
+ return GC_non_gc_bytes;
+}
+
+GC_API void GC_CALL GC_set_free_space_divisor(GC_word value)
+{
+ GC_ASSERT(value > 0);
+ GC_free_space_divisor = value;
+}
+
+GC_API GC_word GC_CALL GC_get_free_space_divisor(void)
+{
+ return GC_free_space_divisor;
+}
+
+GC_API void GC_CALL GC_set_max_retries(GC_word value)
+{
+ GC_ASSERT(value != ~(GC_word)0);
+ GC_max_retries = value;
+}
+
+GC_API GC_word GC_CALL GC_get_max_retries(void)
+{
+ return GC_max_retries;
+}
+
+GC_API void GC_CALL GC_set_dont_precollect(int value)
+{
+ GC_ASSERT(value != -1);
+ /* value is of boolean type. */
+ GC_dont_precollect = value;
+}
+
+GC_API int GC_CALL GC_get_dont_precollect(void)
+{
+ return GC_dont_precollect;
+}
+
+GC_API void GC_CALL GC_set_full_freq(int value)
+{
+ GC_ASSERT(value >= 0);
+ GC_full_freq = value;
+}
+
+GC_API int GC_CALL GC_get_full_freq(void)
+{
+ return GC_full_freq;
+}
+
+GC_API void GC_CALL GC_set_time_limit(unsigned long value)
+{
+ GC_ASSERT(value != (unsigned long)-1L);
+ GC_time_limit = value;
+}
+
+GC_API unsigned long GC_CALL GC_get_time_limit(void)
+{
+ return GC_time_limit;
+}
+
+GC_API void GC_CALL GC_set_force_unmap_on_gcollect(int value)
+{
+ GC_force_unmap_on_gcollect = (GC_bool)value;
+}
+
+GC_API int GC_CALL GC_get_force_unmap_on_gcollect(void)
+{
+ return (int)GC_force_unmap_on_gcollect;
+}
projects / hs-boehmgc.git / blobdiff