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-rw-r--r--misc.c416
1 files changed, 260 insertions, 156 deletions
diff --git a/misc.c b/misc.c
index 780dc7b..94ef15d 100644
--- a/misc.c
+++ b/misc.c
@@ -15,16 +15,21 @@
#include <stdio.h>
+#ifndef _WIN32_WCE
#include <signal.h>
+#endif
#define I_HIDE_POINTERS /* To make GC_call_with_alloc_lock visible */
-#include "gc_priv.h"
+#include "private/gc_pmark.h"
#ifdef SOLARIS_THREADS
# include <sys/syscall.h>
#endif
-#ifdef MSWIN32
+#if defined(MSWIN32) || defined(MSWINCE)
+# define WIN32_LEAN_AND_MEAN
+# define NOSERVICE
# include <windows.h>
+# include <tchar.h>
#endif
# ifdef THREADS
@@ -40,15 +45,22 @@
mutex_t GC_allocate_ml; /* Implicitly initialized. */
# else
# ifdef WIN32_THREADS
- GC_API CRITICAL_SECTION GC_allocate_ml;
+# if !defined(GC_NOT_DLL) && (defined(_DLL) || defined(GC_DLL))
+ __declspec(dllexport) CRITICAL_SECTION GC_allocate_ml;
+# else
+ CRITICAL_SECTION GC_allocate_ml;
+# endif
# else
-# if defined(IRIX_THREADS) || defined(IRIX_JDK_THREADS) \
+# if defined(IRIX_THREADS) \
|| (defined(LINUX_THREADS) && defined(USE_SPIN_LOCK))
pthread_t GC_lock_holder = NO_THREAD;
# else
# if defined(HPUX_THREADS) \
|| defined(LINUX_THREADS) && !defined(USE_SPIN_LOCK)
pthread_mutex_t GC_allocate_ml = PTHREAD_MUTEX_INITIALIZER;
+ pthread_t GC_lock_holder = NO_THREAD;
+ /* Used only for assertions, and to prevent */
+ /* recursive reentry in the system call wrapper. */
# else
--> declare allocator lock here
# endif
@@ -59,28 +71,46 @@
# endif
# endif
+#ifdef ECOS
+#undef STACKBASE
+#endif
+
GC_FAR struct _GC_arrays GC_arrays /* = { 0 } */;
GC_bool GC_debugging_started = FALSE;
/* defined here so we don't have to load debug_malloc.o */
-void (*GC_check_heap)() = (void (*)())0;
+void (*GC_check_heap) GC_PROTO((void)) = (void (*) GC_PROTO((void)))0;
-void (*GC_start_call_back)() = (void (*)())0;
+void (*GC_start_call_back) GC_PROTO((void)) = (void (*) GC_PROTO((void)))0;
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;
+GC_bool GC_print_stats = 0;
+
#ifdef FIND_LEAK
int GC_find_leak = 1;
#else
int GC_find_leak = 0;
#endif
+#ifdef ALL_INTERIOR_POINTERS
+ int GC_all_interior_pointers = 1;
+#else
+ int GC_all_interior_pointers = 0;
+#endif
+
/*ARGSUSED*/
GC_PTR GC_default_oom_fn GC_PROTO((size_t bytes_requested))
{
@@ -103,19 +133,20 @@ extern signed_word GC_mem_found;
{
register unsigned i;
- /* Map size 0 to 1. This avoids problems at lower levels. */
- GC_size_map[0] = 1;
- /* One word objects don't have to be 2 word aligned. */
- for (i = 1; i < sizeof(word); i++) {
- GC_size_map[i] = 1;
+ /* Map size 0 to something bigger. */
+ /* This avoids problems at lower levels. */
+ /* One word objects don't have to be 2 word aligned, */
+ /* unless we're using mark bytes. */
+ for (i = 0; i < sizeof(word); i++) {
+ GC_size_map[i] = MIN_WORDS;
}
- GC_size_map[sizeof(word)] = ROUNDED_UP_WORDS(sizeof(word));
+# if MIN_WORDS > 1
+ GC_size_map[sizeof(word)] = MIN_WORDS;
+# else
+ GC_size_map[sizeof(word)] = ROUNDED_UP_WORDS(sizeof(word));
+# endif
for (i = sizeof(word) + 1; i <= 8 * sizeof(word); i++) {
-# ifdef ALIGN_DOUBLE
- GC_size_map[i] = (ROUNDED_UP_WORDS(i) + 1) & (~1);
-# else
- GC_size_map[i] = ROUNDED_UP_WORDS(i);
-# endif
+ GC_size_map[i] = ALIGNED_WORDS(i);
}
for (i = 8*sizeof(word) + 1; i <= 16 * sizeof(word); i++) {
GC_size_map[i] = (ROUNDED_UP_WORDS(i) + 1) & (~1);
@@ -178,10 +209,10 @@ extern signed_word GC_mem_found;
# endif
}
byte_sz = WORDS_TO_BYTES(word_sz);
-# ifdef ADD_BYTE_AT_END
+ if (GC_all_interior_pointers) {
/* We need one extra byte; don't fill in GC_size_map[byte_sz] */
byte_sz--;
-# endif
+ }
for (j = low_limit; j <= byte_sz; j++) GC_size_map[j] = word_sz;
}
@@ -198,39 +229,24 @@ extern signed_word GC_mem_found;
*/
word GC_stack_last_cleared = 0; /* GC_no when we last did this */
# ifdef THREADS
-# define CLEAR_SIZE 2048
-# else
-# define CLEAR_SIZE 213
+# define BIG_CLEAR_SIZE 2048 /* Clear this much now and then. */
+# define SMALL_CLEAR_SIZE 256 /* Clear this much every time. */
# endif
+# define CLEAR_SIZE 213 /* Granularity for GC_clear_stack_inner */
# define DEGRADE_RATE 50
word GC_min_sp; /* Coolest stack pointer value from which we've */
/* already cleared the stack. */
-# ifdef STACK_GROWS_DOWN
-# define COOLER_THAN >
-# define HOTTER_THAN <
-# define MAKE_COOLER(x,y) if ((word)(x)+(y) > (word)(x)) {(x) += (y);} \
- else {(x) = (word)ONES;}
-# define MAKE_HOTTER(x,y) (x) -= (y)
-# else
-# define COOLER_THAN <
-# define HOTTER_THAN >
-# define MAKE_COOLER(x,y) if ((word)(x)-(y) < (word)(x)) {(x) -= (y);} else {(x) = 0;}
-# define MAKE_HOTTER(x,y) (x) += (y)
-# endif
-
word GC_high_water;
/* "hottest" stack pointer value we have seen */
/* recently. Degrades over time. */
word GC_words_allocd_at_reset;
-#if defined(ASM_CLEAR_CODE) && !defined(THREADS)
+#if defined(ASM_CLEAR_CODE)
extern ptr_t GC_clear_stack_inner();
-#endif
-
-#if !defined(ASM_CLEAR_CODE) && !defined(THREADS)
+#else
/* Clear the stack up to about limit. Return arg. */
/*ARGSUSED*/
ptr_t GC_clear_stack_inner(arg, limit)
@@ -258,10 +274,13 @@ ptr_t arg;
{
register word sp = (word)GC_approx_sp(); /* Hotter than actual sp */
# ifdef THREADS
- word dummy[CLEAR_SIZE];
-# else
- register word limit;
+ 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
+ register word limit;
# define SLOP 400
/* Extra bytes we clear every time. This clears our own */
@@ -279,7 +298,16 @@ ptr_t arg;
/* thus more junk remains accessible, thus the heap gets */
/* larger ... */
# ifdef THREADS
- BZERO(dummy, CLEAR_SIZE*sizeof(word));
+ if (++random_no % 13 == 0) {
+ limit = sp;
+ MAKE_HOTTER(limit, BIG_CLEAR_SIZE*sizeof(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 */
@@ -309,8 +337,8 @@ ptr_t arg;
if (GC_min_sp HOTTER_THAN GC_high_water) GC_min_sp = GC_high_water;
GC_words_allocd_at_reset = GC_words_allocd;
}
+ return(arg);
# endif
- return(arg);
}
@@ -339,37 +367,27 @@ ptr_t arg;
/* to the beginning. */
while (IS_FORWARDING_ADDR_OR_NIL(candidate_hdr)) {
h = FORWARDED_ADDR(h,candidate_hdr);
- r = (word)h + HDR_BYTES;
+ r = (word)h;
candidate_hdr = HDR(h);
}
if (candidate_hdr -> hb_map == GC_invalid_map) return(0);
/* Make sure r points to the beginning of the object */
r &= ~(WORDS_TO_BYTES(1) - 1);
{
- register int offset = (char *)r - (char *)(HBLKPTR(r));
+ register int offset = HBLKDISPL(r);
register signed_word sz = candidate_hdr -> hb_sz;
-
-# ifdef ALL_INTERIOR_POINTERS
- register map_entry_type map_entry;
-
- map_entry = MAP_ENTRY((candidate_hdr -> hb_map), offset);
- if (map_entry == OBJ_INVALID) {
- return(0);
- }
- r -= WORDS_TO_BYTES(map_entry);
- limit = r + WORDS_TO_BYTES(sz);
-# else
- register int correction;
+ register signed_word map_entry;
- offset = BYTES_TO_WORDS(offset - HDR_BYTES);
- correction = offset % sz;
- r -= (WORDS_TO_BYTES(correction));
- limit = r + WORDS_TO_BYTES(sz);
- if (limit > (word)(h + 1)
- && sz <= BYTES_TO_WORDS(HBLKSIZE) - HDR_WORDS) {
+ map_entry = MAP_ENTRY((candidate_hdr -> hb_map), offset);
+ if (map_entry > CPP_MAX_OFFSET) {
+ map_entry = (signed_word)(BYTES_TO_WORDS(offset)) % sz;
+ }
+ r -= WORDS_TO_BYTES(map_entry);
+ limit = r + WORDS_TO_BYTES(sz);
+ if (limit > (word)(h + 1)
+ && sz <= BYTES_TO_WORDS(HBLKSIZE)) {
return(0);
- }
-# endif
+ }
if ((word)p >= limit) return(0);
}
return((GC_PTR)r);
@@ -390,11 +408,7 @@ ptr_t arg;
register hdr * hhdr = HDR(p);
sz = WORDS_TO_BYTES(hhdr -> hb_sz);
- if (sz < 0) {
- return(-sz);
- } else {
- return(sz);
- }
+ return(sz);
}
size_t GC_get_heap_size GC_PROTO(())
@@ -412,6 +426,11 @@ size_t GC_get_bytes_since_gc GC_PROTO(())
return ((size_t) WORDS_TO_BYTES(GC_words_allocd));
}
+size_t GC_get_total_bytes GC_PROTO(())
+{
+ return ((size_t) WORDS_TO_BYTES(GC_words_allocd+GC_words_allocd_before_gc));
+}
+
GC_bool GC_is_initialized = FALSE;
void GC_init()
@@ -424,60 +443,111 @@ void GC_init()
UNLOCK();
ENABLE_SIGNALS();
+# if defined(PARALLEL_MARK) || defined(THREAD_LOCAL_ALLOC)
+ /* Make sure marker threads and started and thread local */
+ /* allocation is initialized, in case we didn't get */
+ /* called from GC_init_parallel(); */
+ {
+ extern void GC_init_parallel(void);
+ GC_init_parallel();
+ }
+# endif /* PARALLEL_MARK || THREAD_LOCAL_ALLOC */
}
+#if defined(MSWIN32) || defined(MSWINCE)
+ CRITICAL_SECTION GC_write_cs;
+#endif
+
#ifdef MSWIN32
- extern void GC_init_win32();
+ extern void GC_init_win32 GC_PROTO((void));
#endif
extern void GC_setpagesize();
+#ifdef UNIX_LIKE
+
+extern void GC_set_and_save_fault_handler GC_PROTO((void (*handler)(int)));
+
+static void looping_handler(sig)
+int sig;
+{
+ GC_err_printf1("Caught signal %d: looping in handler\n", sig);
+ for(;;);
+}
+#endif
+
void GC_init_inner()
{
-# ifndef THREADS
+# if !defined(THREADS) && defined(GC_ASSERTIONS)
word dummy;
# endif
+ word initial_heap_sz = (word)MINHINCR;
if (GC_is_initialized) return;
- GC_setpagesize();
- GC_exclude_static_roots(beginGC_arrays, end_gc_area);
# ifdef PRINTSTATS
- if ((ptr_t)endGC_arrays != (ptr_t)(&GC_obj_kinds)) {
- GC_printf0("Reordering linker, didn't exclude obj_kinds\n");
- }
+ GC_print_stats = 1;
+# endif
+ if (0 != GETENV("GC_PRINT_STATS")) {
+ GC_print_stats = 1;
+ }
+ if (0 != GETENV("GC_FIND_LEAK")) {
+ GC_find_leak = 1;
+ }
+ if (0 != GETENV("GC_ALL_INTERIOR_POINTERS")) {
+ GC_all_interior_pointers = 1;
+ }
+ if (0 != GETENV("GC_DONT_GC")) {
+ GC_dont_gc = 1;
+ }
+# ifdef UNIX_LIKE
+ if (0 != GETENV("GC_LOOP_ON_ABORT")) {
+ GC_set_and_save_fault_handler(looping_handler);
+ }
+# endif
+ /* 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);
+ }
+# if defined(MSWIN32) || defined(MSWINCE)
+ InitializeCriticalSection(&GC_write_cs);
+# endif
+ GC_setpagesize();
+ GC_exclude_static_roots(beginGC_arrays, endGC_arrays);
+ GC_exclude_static_roots(beginGC_obj_kinds, endGC_obj_kinds);
+# ifdef SEPARATE_GLOBALS
+ GC_exclude_static_roots(beginGC_objfreelist, endGC_objfreelist);
+ GC_exclude_static_roots(beginGC_aobjfreelist, endGC_aobjfreelist);
# endif
# ifdef MSWIN32
GC_init_win32();
# endif
# if defined(SEARCH_FOR_DATA_START)
- /* This doesn't really work if the collector is in a shared library. */
GC_init_linux_data_start();
# endif
-# ifdef SOLARIS_THREADS
- GC_thr_init();
- /* We need dirty bits in order to find live stack sections. */
- GC_dirty_init();
+# if defined(NETBSD) && defined(__ELF__)
+ GC_init_netbsd_elf();
# endif
# if defined(IRIX_THREADS) || defined(LINUX_THREADS) \
- || defined(IRIX_JDK_THREADS) || defined(HPUX_THREADS)
+ || defined(HPUX_THREADS) || defined(SOLARIS_THREADS)
GC_thr_init();
# endif
+# ifdef SOLARIS_THREADS
+ /* We need dirty bits in order to find live stack sections. */
+ GC_dirty_init();
+# endif
# if !defined(THREADS) || defined(SOLARIS_THREADS) || defined(WIN32_THREADS) \
|| defined(IRIX_THREADS) || defined(LINUX_THREADS) \
|| defined(HPUX_THREADS)
if (GC_stackbottom == 0) {
GC_stackbottom = GC_get_stack_base();
+# if defined(LINUX) && defined(IA64)
+ GC_register_stackbottom = GC_get_register_stack_base();
+# endif
}
# endif
- if (sizeof (ptr_t) != sizeof(word)) {
- ABORT("sizeof (ptr_t) != sizeof(word)\n");
- }
- if (sizeof (signed_word) != sizeof(word)) {
- ABORT("sizeof (signed_word) != sizeof(word)\n");
- }
- if (sizeof (struct hblk) != HBLKSIZE) {
- ABORT("sizeof (struct hblk) != HBLKSIZE\n");
- }
+ GC_ASSERT(sizeof (ptr_t) == sizeof(word));
+ GC_ASSERT(sizeof (signed_word) == sizeof(word));
+ GC_ASSERT(sizeof (struct hblk) == HBLKSIZE);
# ifndef THREADS
# if defined(STACK_GROWS_UP) && defined(STACK_GROWS_DOWN)
ABORT(
@@ -488,40 +558,16 @@ void GC_init_inner()
"One of STACK_GROWS_UP and STACK_GROWS_DOWN should be defd\n");
# endif
# ifdef STACK_GROWS_DOWN
- if ((word)(&dummy) > (word)GC_stackbottom) {
- GC_err_printf0(
- "STACK_GROWS_DOWN is defd, but stack appears to grow up\n");
-# ifndef UTS4 /* Compiler bug workaround */
- GC_err_printf2("sp = 0x%lx, GC_stackbottom = 0x%lx\n",
- (unsigned long) (&dummy),
- (unsigned long) GC_stackbottom);
-# endif
- ABORT("stack direction 3\n");
- }
+ GC_ASSERT((word)(&dummy) <= (word)GC_stackbottom);
# else
- if ((word)(&dummy) < (word)GC_stackbottom) {
- GC_err_printf0(
- "STACK_GROWS_UP is defd, but stack appears to grow down\n");
- GC_err_printf2("sp = 0x%lx, GC_stackbottom = 0x%lx\n",
- (unsigned long) (&dummy),
- (unsigned long) GC_stackbottom);
- ABORT("stack direction 4");
- }
+ GC_ASSERT((word)(&dummy) >= (word)GC_stackbottom);
# endif
# endif
# if !defined(_AUX_SOURCE) || defined(__GNUC__)
- if ((word)(-1) < (word)0) {
- GC_err_printf0("The type word should be an unsigned integer type\n");
- GC_err_printf0("It appears to be signed\n");
- ABORT("word");
- }
+ GC_ASSERT((word)(-1) > (word)0);
+ /* word should be unsigned */
# endif
- if ((signed_word)(-1) >= (signed_word)0) {
- GC_err_printf0(
- "The type signed_word should be a signed integer type\n");
- GC_err_printf0("It appears to be unsigned\n");
- ABORT("signed_word");
- }
+ GC_ASSERT((signed_word)(-1) < (signed_word)0);
/* Add initial guess of root sets. Do this first, since sbrk(0) */
/* might be used. */
@@ -529,7 +575,18 @@ void GC_init_inner()
GC_init_headers();
GC_bl_init();
GC_mark_init();
- if (!GC_expand_hp_inner((word)MINHINCR)) {
+ {
+ char * sz_str = GETENV("GC_INITIAL_HEAP_SIZE");
+ if (sz_str != NULL) {
+ initial_heap_sz = atoi(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);
+ }
+ }
+ if (!GC_expand_hp_inner(initial_heap_sz)) {
GC_err_printf0("Can't start up: not enough memory\n");
EXIT();
}
@@ -554,11 +611,11 @@ void GC_init_inner()
GC_pcr_install();
# endif
/* Get black list set up */
- GC_gcollect_inner();
+ if (!GC_dont_precollect) GC_gcollect_inner();
+ GC_is_initialized = TRUE;
# ifdef STUBBORN_ALLOC
GC_stubborn_init();
# endif
- GC_is_initialized = TRUE;
/* Convince lint that some things are used */
# ifdef LINT
{
@@ -623,25 +680,41 @@ out:
}
-#ifdef MSWIN32
-# define LOG_FILE "gc.log"
+#if defined(MSWIN32) || defined(MSWINCE)
+# define LOG_FILE _T("gc.log")
- HANDLE GC_stdout = 0, GC_stderr;
- int GC_tmp;
- DWORD GC_junk;
+ HANDLE GC_stdout = 0;
- void GC_set_files()
+ void GC_deinit()
{
- if (!GC_stdout) {
- GC_stdout = CreateFile(LOG_FILE, GENERIC_WRITE,
- FILE_SHARE_READ | FILE_SHARE_WRITE,
- NULL, CREATE_ALWAYS, FILE_FLAG_WRITE_THROUGH,
- NULL);
- if (INVALID_HANDLE_VALUE == GC_stdout) ABORT("Open of log file failed");
- }
- if (GC_stderr == 0) {
- GC_stderr = GC_stdout;
- }
+ if (GC_is_initialized) {
+ DeleteCriticalSection(&GC_write_cs);
+ }
+ }
+
+ int GC_write(buf, len)
+ GC_CONST char * buf;
+ size_t len;
+ {
+ BOOL tmp;
+ DWORD written;
+ if (len == 0)
+ return 0;
+ EnterCriticalSection(&GC_write_cs);
+ if (GC_stdout == INVALID_HANDLE_VALUE) {
+ return -1;
+ } else if (GC_stdout == 0) {
+ GC_stdout = CreateFile(LOG_FILE, GENERIC_WRITE,
+ FILE_SHARE_READ | FILE_SHARE_WRITE,
+ NULL, CREATE_ALWAYS, FILE_FLAG_WRITE_THROUGH,
+ NULL);
+ if (GC_stdout == INVALID_HANDLE_VALUE) ABORT("Open of log file failed");
+ }
+ tmp = WriteFile(GC_stdout, buf, len, &written, NULL);
+ if (!tmp)
+ DebugBreak();
+ LeaveCriticalSection(&GC_write_cs);
+ return tmp ? (int)written : -1;
}
#endif
@@ -662,7 +735,7 @@ int GC_tmp; /* Should really be local ... */
}
#endif
-#if !defined(OS2) && !defined(MACOS) && !defined(MSWIN32)
+#if !defined(OS2) && !defined(MACOS) && !defined(MSWIN32) && !defined(MSWINCE)
int GC_stdout = 1;
int GC_stderr = 2;
# if !defined(AMIGA)
@@ -670,10 +743,10 @@ int GC_tmp; /* Should really be local ... */
# endif
#endif
-#if !defined(MSWIN32) && !defined(OS2) && !defined(MACOS)
+#if !defined(MSWIN32) && !defined(MSWINCE) && !defined(OS2) && !defined(MACOS)
int GC_write(fd, buf, len)
int fd;
-char *buf;
+GC_CONST char *buf;
size_t len;
{
register int bytes_written = 0;
@@ -693,11 +766,17 @@ size_t len;
}
#endif /* UN*X */
-#ifdef MSWIN32
-# define WRITE(f, buf, len) (GC_set_files(), \
- GC_tmp = WriteFile((f), (buf), \
- (len), &GC_junk, NULL),\
- (GC_tmp? 1 : -1))
+#if defined(ECOS)
+int GC_write(fd, buf, len)
+{
+ _Jv_diag_write (buf, len);
+ return len;
+}
+#endif
+
+
+#if defined(MSWIN32) || defined(MSWINCE)
+# define WRITE(f, buf, len) GC_write(buf, len)
#else
# if defined(OS2) || defined(MACOS)
# define WRITE(f, buf, len) (GC_set_files(), \
@@ -715,7 +794,7 @@ size_t len;
/* same size as long, and that the format conversions expect something */
/* of that size. */
void GC_printf(format, a, b, c, d, e, f)
-char * format;
+GC_CONST char * format;
long a, b, c, d, e, f;
{
char buf[1025];
@@ -728,7 +807,7 @@ long a, b, c, d, e, f;
}
void GC_err_printf(format, a, b, c, d, e, f)
-char * format;
+GC_CONST char * format;
long a, b, c, d, e, f;
{
char buf[1025];
@@ -740,11 +819,20 @@ long a, b, c, d, e, f;
}
void GC_err_puts(s)
-char *s;
+GC_CONST char *s;
{
if (WRITE(GC_stderr, s, strlen(s)) < 0) ABORT("write to stderr failed");
}
+#if defined(LINUX) && !defined(SMALL_CONFIG)
+void GC_err_write(buf, len)
+GC_CONST char *buf;
+size_t len;
+{
+ if (WRITE(GC_stderr, buf, len) < 0) ABORT("write to stderr failed");
+}
+#endif
+
# if defined(__STDC__) || defined(__cplusplus)
void GC_default_warn_proc(char *msg, GC_word arg)
# else
@@ -777,10 +865,26 @@ GC_warn_proc GC_current_warn_proc = GC_default_warn_proc;
#ifndef PCR
void GC_abort(msg)
-char * msg;
+GC_CONST char * msg;
{
- GC_err_printf1("%s\n", msg);
- (void) abort();
+# if defined(MSWIN32)
+ (void) MessageBoxA(NULL, msg, "Fatal error in gc", MB_ICONERROR|MB_OK);
+ DebugBreak();
+# else
+ GC_err_printf1("%s\n", msg);
+# endif
+ 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(;;) {}
+ }
+# ifdef MSWIN32
+ DebugBreak();
+# else
+ (void) abort();
+# endif
}
#endif
@@ -843,4 +947,4 @@ void GC_dump()
GC_print_block_list();
}
-# endif /* NO_DEBUGGING */
+#endif /* NO_DEBUGGING */