}
#endif /* !SHORT_DBG_HDRS */
+#ifdef LINT2
+ long GC_random(void)
+ {
+ static unsigned seed = 1; /* not thread-safe */
+
+ /* Linear congruential pseudo-random numbers generator. */
+ seed = (seed * 1103515245U + 12345) & GC_RAND_MAX; /* overflow is ok */
+ return (long)seed;
+ }
+#endif
+
#ifdef KEEP_BACK_PTRS
+#ifdef LINT2
+# define RANDOM() GC_random()
+#else
# include <stdlib.h>
+# define GC_RAND_MAX RAND_MAX
# if defined(__GLIBC__) || defined(SOLARIS) \
|| defined(HPUX) || defined(IRIX5) || defined(OSF1)
# else
# define RANDOM() (long)rand()
# endif
+#endif /* !LINT2 */
/* Store back pointer to source in dest, if that appears to be possible. */
/* This is not completely safe, since we may mistakenly conclude that */
GC_INNER void GC_store_back_pointer(ptr_t source, ptr_t dest)
{
if (GC_HAS_DEBUG_INFO(dest)) {
- ((oh *)dest) -> oh_back_ptr = HIDE_BACK_PTR(source);
+# ifdef PARALLEL_MARK
+ AO_store((volatile AO_t *)&((oh *)dest)->oh_back_ptr,
+ (AO_t)HIDE_BACK_PTR(source));
+# else
+ ((oh *)dest) -> oh_back_ptr = HIDE_BACK_PTR(source);
+# endif
}
}
if (!hdr) ABORT("Invalid GC_get_back_ptr_info argument");
# endif
if (!GC_HAS_DEBUG_INFO((ptr_t) hdr)) return GC_NO_SPACE;
- bp = GC_REVEAL_POINTER(hdr -> oh_back_ptr);
+ bp = (ptr_t)GC_REVEAL_POINTER(hdr -> oh_back_ptr);
if (MARKED_FOR_FINALIZATION == bp) return GC_FINALIZER_REFD;
if (MARKED_FROM_REGISTER == bp) return GC_REFD_FROM_REG;
if (NOT_MARKED == bp) return GC_UNREFERENCED;
}
}
# endif
- bp_base = GC_base(bp);
- if (0 == bp_base) {
+ bp_base = (ptr_t)GC_base(bp);
+ if (NULL == bp_base) {
*base_p = bp;
*offset_p = 0;
return GC_REFD_FROM_ROOT;
GC_API void * GC_CALL GC_generate_random_heap_address(void)
{
size_t i;
- size_t size;
word heap_offset = RANDOM();
- if (GC_heapsize > RAND_MAX) {
- heap_offset *= RAND_MAX;
+ if (GC_heapsize > GC_RAND_MAX) {
+ heap_offset *= GC_RAND_MAX;
heap_offset += RANDOM();
}
heap_offset %= GC_heapsize;
/* e.g. RAND_MAX = 1.5* GC_heapsize. But for typical cases, */
/* it's not too bad. */
for (i = 0;; ++i) {
+ size_t size;
+
if (i >= GC_n_heap_sects)
ABORT("GC_generate_random_heap_address: size inconsistency");
ptr_t result;
ptr_t base;
do {
- result = GC_generate_random_heap_address();
- base = GC_base(result);
- } while (base == 0 || !GC_is_marked(base));
+ result = (ptr_t)GC_generate_random_heap_address();
+ base = (ptr_t)GC_base(result);
+ } while (NULL == base || !GC_is_marked(base));
return result;
}
size_t offset;
void *base;
- GC_print_heap_obj(GC_base(current));
+ GC_print_heap_obj((ptr_t)GC_base(current));
for (i = 0; ; ++i) {
source = GC_get_back_ptr_info(current, &base, &offset);
case GC_REFD_FROM_HEAP:
GC_err_printf("offset %ld in object:\n", (long)offset);
/* Take GC_base(base) to get real base, i.e. header. */
- GC_print_heap_obj(GC_base(base));
+ GC_print_heap_obj((ptr_t)GC_base(base));
break;
default:
GC_err_printf("INTERNAL ERROR: UNEXPECTED SOURCE!!!!\n");
# define CROSSES_HBLK(p, sz) \
(((word)((p) + sizeof(oh) + (sz) - 1) ^ (word)(p)) >= HBLKSIZE)
-/* Store debugging info into p. Return displaced pointer. */
-/* This version assumes we do hold the allocation lock. */
-STATIC ptr_t GC_store_debug_info_inner(ptr_t p, word sz GC_ATTR_UNUSED,
- const char *string, int linenum)
+GC_INNER void *GC_store_debug_info_inner(void *p, word sz GC_ATTR_UNUSED,
+ const char *string, int linenum)
{
word * result = (word *)((oh *)p + 1);
+ GC_ASSERT(I_HOLD_LOCK());
GC_ASSERT(GC_size(p) >= sizeof(oh) + sz);
- GC_ASSERT(!(SMALL_OBJ(sz) && CROSSES_HBLK(p, sz)));
+ GC_ASSERT(!(SMALL_OBJ(sz) && CROSSES_HBLK((ptr_t)p, sz)));
# ifdef KEEP_BACK_PTRS
((oh *)p) -> oh_back_ptr = HIDE_BACK_PTR(NOT_MARKED);
# endif
((word *)p)[BYTES_TO_WORDS(GC_size(p))-1] =
result[SIMPLE_ROUNDED_UP_WORDS(sz)] = END_FLAG ^ (word)result;
# endif
- return((ptr_t)result);
+ return result;
}
-GC_INNER ptr_t GC_store_debug_info(ptr_t p, word sz, const char *string,
- int linenum)
+/* Check the allocation is successful, store debugging info into p, */
+/* start the debugging mode (if not yet), and return displaced pointer. */
+#ifdef GC_ADD_CALLER
+# define STORE_DEBUG_INFO(p, lb, fn) store_debug_info(p, lb, fn, ra, s, i)
+#else
+# define STORE_DEBUG_INFO(p, lb, fn) store_debug_info(p, lb, fn, s, i)
+#endif
+static void *store_debug_info(void *p, size_t lb,
+ const char *fn, GC_EXTRA_PARAMS)
{
- ptr_t result;
+ void *result;
DCL_LOCK_STATE;
+ if (NULL == p) {
+ GC_err_printf("%s(%lu) returning NULL (%s:%d)\n",
+ fn, (unsigned long)lb, s, i);
+ return NULL;
+ }
LOCK();
- result = GC_store_debug_info_inner(p, sz, string, linenum);
+ if (!GC_debugging_started)
+ GC_start_debugging_inner();
+ ADD_CALL_CHAIN(p, ra);
+ result = GC_store_debug_info_inner(p, (word)lb, s, i);
UNLOCK();
return result;
}
ptr_t q;
hdr * hhdr;
int kind;
- char *kind_str;
+ const char *kind_str;
char buffer[GC_TYPE_DESCR_LEN + 1];
GC_ASSERT(I_DONT_HOLD_LOCK());
if (NULL != kind_str) {
GC_err_printf("%p (%s:%d," IF_NOT_SHORTDBG_HDRS(" sz=%lu,") " %s)\n",
- (ptr_t)ohdr + sizeof(oh),
+ (void *)((ptr_t)ohdr + sizeof(oh)),
ohdr->oh_string, GET_OH_LINENUM(ohdr) /*, */
COMMA_IFNOT_SHORTDBG_HDRS((unsigned long)ohdr->oh_sz),
kind_str);
} else {
GC_err_printf("%p (%s:%d," IF_NOT_SHORTDBG_HDRS(" sz=%lu,")
- " kind=%d descr=0x%lx)\n", (ptr_t)ohdr + sizeof(oh),
+ " kind=%d descr=0x%lx)\n",
+ (void *)((ptr_t)ohdr + sizeof(oh)),
ohdr->oh_string, GET_OH_LINENUM(ohdr) /*, */
COMMA_IFNOT_SHORTDBG_HDRS((unsigned long)ohdr->oh_sz),
kind, (unsigned long)hhdr->hb_descr);
/* Use GC_err_printf and friends to print a description of the object */
/* whose client-visible address is p, and which was smashed at */
/* clobbered_addr. */
- STATIC void GC_print_smashed_obj(const char *msg, ptr_t p,
+ STATIC void GC_print_smashed_obj(const char *msg, void *p,
ptr_t clobbered_addr)
{
oh * ohdr = (oh *)GC_base(p);
|| ohdr -> oh_string == 0) {
GC_err_printf(
"%s %p in or near object at %p(<smashed>, appr. sz = %lu)\n",
- msg, clobbered_addr, p,
+ msg, (void *)clobbered_addr, p,
(unsigned long)(GC_size((ptr_t)ohdr) - DEBUG_BYTES));
} else {
GC_err_printf("%s %p in or near object at %p (%s:%d, sz=%lu)\n",
- msg, clobbered_addr, p,
+ msg, (void *)clobbered_addr, p,
(word)(ohdr -> oh_string) < HBLKSIZE ? "(smashed string)" :
ohdr -> oh_string[0] == '\0' ? "EMPTY(smashed?)" :
ohdr -> oh_string,
PRINT_CALL_CHAIN(ohdr);
}
}
-#endif
-#ifndef SHORT_DBG_HDRS
STATIC void GC_check_heap_proc (void);
STATIC void GC_print_all_smashed_proc (void);
#else
STATIC void GC_do_nothing(void) {}
#endif
-STATIC void GC_start_debugging_inner(void)
+GC_INNER void GC_start_debugging_inner(void)
{
GC_ASSERT(I_HOLD_LOCK());
# ifndef SHORT_DBG_HDRS
GC_register_displacement_inner((word)sizeof(oh));
}
-GC_INNER void GC_start_debugging(void)
-{
- DCL_LOCK_STATE;
-
- LOCK();
- GC_start_debugging_inner();
- UNLOCK();
-}
-
size_t GC_debug_header_size = sizeof(oh);
GC_API void GC_CALL GC_debug_register_displacement(size_t offset)
}
#ifdef GC_ADD_CALLER
-# if defined(HAVE_DLADDR) && defined(GC_RETURN_ADDR_PARENT)
+# if defined(HAVE_DLADDR) && defined(GC_HAVE_RETURN_ADDR_PARENT)
# include <dlfcn.h>
STATIC void GC_caller_func_offset(word ad, const char **symp, int *offp)
/* Note that according to malloc() specification, if size is 0 then */
/* malloc() returns either NULL, or a unique pointer value that can */
/* later be successfully passed to free(). We always do the latter. */
- result = GC_malloc(lb + DEBUG_BYTES);
+ result = GC_malloc(SIZET_SAT_ADD(lb, DEBUG_BYTES));
# ifdef GC_ADD_CALLER
if (s == NULL) {
GC_caller_func_offset(ra, &s, &i);
}
# endif
- if (result == 0) {
- GC_err_printf("GC_debug_malloc(%lu) returning NULL (%s:%d)\n",
- (unsigned long)lb, s, i);
- return(0);
- }
- if (!GC_debugging_started) {
- GC_start_debugging();
- }
- ADD_CALL_CHAIN(result, ra);
- return (GC_store_debug_info(result, (word)lb, s, i));
+ return STORE_DEBUG_INFO(result, lb, "GC_debug_malloc");
}
GC_API GC_ATTR_MALLOC void * GC_CALL
GC_debug_malloc_ignore_off_page(size_t lb, GC_EXTRA_PARAMS)
{
- void * result = GC_malloc_ignore_off_page(lb + DEBUG_BYTES);
+ void * result = GC_malloc_ignore_off_page(SIZET_SAT_ADD(lb, DEBUG_BYTES));
- if (result == 0) {
- GC_err_printf("GC_debug_malloc_ignore_off_page(%lu)"
- " returning NULL (%s:%d)\n", (unsigned long)lb, s, i);
- return(0);
- }
- if (!GC_debugging_started) {
- GC_start_debugging();
- }
- ADD_CALL_CHAIN(result, ra);
- return (GC_store_debug_info(result, (word)lb, s, i));
+ return STORE_DEBUG_INFO(result, lb, "GC_debug_malloc_ignore_off_page");
}
GC_API GC_ATTR_MALLOC void * GC_CALL
GC_debug_malloc_atomic_ignore_off_page(size_t lb, GC_EXTRA_PARAMS)
{
- void * result = GC_malloc_atomic_ignore_off_page(lb + DEBUG_BYTES);
+ void * result = GC_malloc_atomic_ignore_off_page(
+ SIZET_SAT_ADD(lb, DEBUG_BYTES));
- if (result == 0) {
- GC_err_printf("GC_debug_malloc_atomic_ignore_off_page(%lu)"
- " returning NULL (%s:%d)\n", (unsigned long)lb, s, i);
- return(0);
- }
- if (!GC_debugging_started) {
- GC_start_debugging();
- }
- ADD_CALL_CHAIN(result, ra);
- return (GC_store_debug_info(result, (word)lb, s, i));
+ return STORE_DEBUG_INFO(result, lb,
+ "GC_debug_malloc_atomic_ignore_off_page");
}
STATIC void * GC_debug_generic_malloc(size_t lb, int knd, GC_EXTRA_PARAMS)
{
- void * result = GC_generic_malloc(lb + DEBUG_BYTES, knd);
+ void * result = GC_generic_malloc(SIZET_SAT_ADD(lb, DEBUG_BYTES), knd);
- if (NULL == result) {
- GC_err_printf(
- "GC_debug_generic_malloc(%lu, %d) returning NULL (%s:%d)\n",
- (unsigned long)lb, knd, s, i);
- return NULL;
- }
- if (!GC_debugging_started) {
- GC_start_debugging();
- }
- ADD_CALL_CHAIN(result, ra);
- return GC_store_debug_info(result, (word)lb, s, i);
+ return STORE_DEBUG_INFO(result, lb, "GC_debug_generic_malloc");
}
#ifdef DBG_HDRS_ALL
/* An allocation function for internal use. Normally internally */
/* allocated objects do not have debug information. But in this */
/* case, we need to make sure that all objects have debug headers. */
- /* We assume debugging was started in collector initialization, and */
- /* we already hold the GC lock. */
GC_INNER void * GC_debug_generic_malloc_inner(size_t lb, int k)
{
- void * result = GC_generic_malloc_inner(lb + DEBUG_BYTES, k);
+ void * result;
- if (result == 0) {
+ GC_ASSERT(I_HOLD_LOCK());
+ result = GC_generic_malloc_inner(SIZET_SAT_ADD(lb, DEBUG_BYTES), k);
+ if (NULL == result) {
GC_err_printf("GC internal allocation (%lu bytes) returning NULL\n",
(unsigned long) lb);
return(0);
GC_INNER void * GC_debug_generic_malloc_inner_ignore_off_page(size_t lb,
int k)
{
- void * result = GC_generic_malloc_inner_ignore_off_page(
- lb + DEBUG_BYTES, k);
+ void * result;
- if (result == 0) {
+ GC_ASSERT(I_HOLD_LOCK());
+ result = GC_generic_malloc_inner_ignore_off_page(
+ SIZET_SAT_ADD(lb, DEBUG_BYTES), k);
+ if (NULL == result) {
GC_err_printf("GC internal allocation (%lu bytes) returning NULL\n",
(unsigned long) lb);
return(0);
GC_API GC_ATTR_MALLOC void * GC_CALL GC_debug_malloc_stubborn(size_t lb,
GC_EXTRA_PARAMS)
{
- void * result = GC_malloc_stubborn(lb + DEBUG_BYTES);
+ void * result = GC_malloc_stubborn(SIZET_SAT_ADD(lb, DEBUG_BYTES));
- if (result == 0) {
- GC_err_printf("GC_debug_malloc_stubborn(%lu)"
- " returning NULL (%s:%d)\n", (unsigned long)lb, s, i);
- return(0);
- }
- if (!GC_debugging_started) {
- GC_start_debugging();
- }
- ADD_CALL_CHAIN(result, ra);
- return (GC_store_debug_info(result, (word)lb, s, i));
+ return STORE_DEBUG_INFO(result, lb, "GC_debug_malloc_stubborn");
}
GC_API void GC_CALL GC_debug_change_stubborn(const void *p)
GC_API GC_ATTR_MALLOC void * GC_CALL GC_debug_malloc_atomic(size_t lb,
GC_EXTRA_PARAMS)
{
- void * result = GC_malloc_atomic(lb + DEBUG_BYTES);
+ void * result = GC_malloc_atomic(SIZET_SAT_ADD(lb, DEBUG_BYTES));
- if (result == 0) {
- GC_err_printf("GC_debug_malloc_atomic(%lu) returning NULL (%s:%d)\n",
- (unsigned long)lb, s, i);
- return(0);
- }
- if (!GC_debugging_started) {
- GC_start_debugging();
- }
- ADD_CALL_CHAIN(result, ra);
- return (GC_store_debug_info(result, (word)lb, s, i));
+ return STORE_DEBUG_INFO(result, lb, "GC_debug_malloc_atomic");
}
GC_API GC_ATTR_MALLOC char * GC_CALL GC_debug_strdup(const char *str,
}
lb = strlen(str) + 1;
- copy = GC_debug_malloc_atomic(lb, OPT_RA s, i);
+ copy = (char *)GC_debug_malloc_atomic(lb, OPT_RA s, i);
if (copy == NULL) {
# ifndef MSWINCE
errno = ENOMEM;
size_t len = strlen(str); /* str is expected to be non-NULL */
if (len > size)
len = size;
- copy = GC_debug_malloc_atomic(len + 1, OPT_RA s, i);
+ copy = (char *)GC_debug_malloc_atomic(len + 1, OPT_RA s, i);
if (copy == NULL) {
# ifndef MSWINCE
errno = ENOMEM;
# endif
return NULL;
}
- BCOPY(str, copy, len);
+ if (len > 0)
+ BCOPY(str, copy, len);
copy[len] = '\0';
return copy;
}
GC_EXTRA_PARAMS)
{
size_t lb = (wcslen(str) + 1) * sizeof(wchar_t);
- wchar_t *copy = GC_debug_malloc_atomic(lb, OPT_RA s, i);
+ wchar_t *copy = (wchar_t *)GC_debug_malloc_atomic(lb, OPT_RA s, i);
if (copy == NULL) {
# ifndef MSWINCE
errno = ENOMEM;
GC_API GC_ATTR_MALLOC void * GC_CALL GC_debug_malloc_uncollectable(size_t lb,
GC_EXTRA_PARAMS)
{
- void * result = GC_malloc_uncollectable(lb + UNCOLLECTABLE_DEBUG_BYTES);
+ void * result = GC_malloc_uncollectable(
+ SIZET_SAT_ADD(lb, UNCOLLECTABLE_DEBUG_BYTES));
- if (result == 0) {
- GC_err_printf("GC_debug_malloc_uncollectable(%lu)"
- " returning NULL (%s:%d)\n", (unsigned long)lb, s, i);
- return(0);
- }
- if (!GC_debugging_started) {
- GC_start_debugging();
- }
- ADD_CALL_CHAIN(result, ra);
- return (GC_store_debug_info(result, (word)lb, s, i));
+ return STORE_DEBUG_INFO(result, lb, "GC_debug_malloc_uncollectable");
}
#ifdef GC_ATOMIC_UNCOLLECTABLE
GC_API GC_ATTR_MALLOC void * GC_CALL
GC_debug_malloc_atomic_uncollectable(size_t lb, GC_EXTRA_PARAMS)
{
- void * result =
- GC_malloc_atomic_uncollectable(lb + UNCOLLECTABLE_DEBUG_BYTES);
+ void * result = GC_malloc_atomic_uncollectable(
+ SIZET_SAT_ADD(lb, UNCOLLECTABLE_DEBUG_BYTES));
- if (result == 0) {
- GC_err_printf("GC_debug_malloc_atomic_uncollectable(%lu)"
- " returning NULL (%s:%d)\n", (unsigned long)lb, s, i);
- return(0);
- }
- if (!GC_debugging_started) {
- GC_start_debugging();
- }
- ADD_CALL_CHAIN(result, ra);
- return (GC_store_debug_info(result, (word)lb, s, i));
+ return STORE_DEBUG_INFO(result, lb,
+ "GC_debug_malloc_atomic_uncollectable");
}
#endif /* GC_ATOMIC_UNCOLLECTABLE */
ptr_t base;
if (0 == p) return;
- base = GC_base(p);
- if (base == 0) {
+ base = (ptr_t)GC_base(p);
+ if (NULL == base) {
+# if defined(REDIRECT_MALLOC) \
+ && ((defined(NEED_CALLINFO) && defined(GC_HAVE_BUILTIN_BACKTRACE)) \
+ || defined(GC_LINUX_THREADS) || defined(GC_SOLARIS_THREADS) \
+ || defined(MSWIN32))
+ /* In some cases, we should ignore objects that do not belong */
+ /* to the GC heap. See the comment in GC_free. */
+ if (!GC_is_heap_ptr(p)) return;
+# endif
ABORT_ARG1("Invalid pointer passed to free()", ": %p", p);
}
if ((ptr_t)p - (ptr_t)base != sizeof(oh)) {
+# if defined(REDIRECT_FREE) && defined(USE_PROC_FOR_LIBRARIES)
+ /* TODO: Suppress the warning if free() caller is in libpthread */
+ /* or libdl. */
+# endif
GC_err_printf(
"GC_debug_free called on pointer %p w/o debugging info\n", p);
} else {
) {
GC_free(base);
} else {
- size_t i;
- size_t obj_sz = BYTES_TO_WORDS(hhdr -> hb_sz - sizeof(oh));
+ word i;
+ word obj_sz = BYTES_TO_WORDS(hhdr->hb_sz - sizeof(oh));
for (i = 0; i < obj_sz; ++i)
((word *)p)[i] = GC_FREED_MEM_MARKER;
/* Used internally; we assume it's called correctly. */
GC_INNER void GC_debug_free_inner(void * p)
{
- ptr_t base = GC_base(p);
+ ptr_t base = (ptr_t)GC_base(p);
GC_ASSERT((ptr_t)p - (ptr_t)base == sizeof(oh));
# ifdef LINT2
if (!base) ABORT("Invalid GC_debug_free_inner argument");
if (p == 0) {
return GC_debug_malloc(lb, OPT_RA s, i);
}
+ if (0 == lb) /* and p != NULL */ {
+ GC_debug_free(p);
+ return NULL;
+ }
+
# ifdef GC_ADD_CALLER
if (s == NULL) {
GC_caller_func_offset(ra, &s, &i);
# else
old_sz = ((oh *)base) -> oh_sz;
# endif
- BCOPY(p, result, old_sz < lb ? old_sz : lb);
+ if (old_sz > 0)
+ BCOPY(p, result, old_sz < lb ? old_sz : lb);
GC_debug_free(p);
}
return(result);
STATIC void GC_check_heap_block(struct hblk *hbp, word dummy GC_ATTR_UNUSED)
{
struct hblkhdr * hhdr = HDR(hbp);
- size_t sz = hhdr -> hb_sz;
- size_t bit_no;
+ word sz = hhdr -> hb_sz;
+ word bit_no;
char *p, *plim;
p = hbp->hb_body;
GC_INNER GC_bool GC_check_leaked(ptr_t base)
{
- size_t i;
- size_t obj_sz;
+ word i;
+ word obj_sz;
word *p;
if (
}
/* Special finalizer_proc value to detect GC_register_finalizer() failure. */
-#define OFN_UNSET (GC_finalization_proc)(signed_word)-1
+#define OFN_UNSET ((GC_finalization_proc)~(signed_word)0)
/* Set ofn and ocd to reflect the values we got back. */
static void store_old(void *obj, GC_finalization_proc my_old_fn,
{
GC_finalization_proc my_old_fn = OFN_UNSET;
void * my_old_cd;
- ptr_t base = GC_base(obj);
- if (0 == base) {
+ ptr_t base = (ptr_t)GC_base(obj);
+ if (NULL == base) {
/* We won't collect it, hence finalizer wouldn't be run. */
if (ocd) *ocd = 0;
if (ofn) *ofn = 0;
{
GC_finalization_proc my_old_fn = OFN_UNSET;
void * my_old_cd;
- ptr_t base = GC_base(obj);
- if (0 == base) {
+ ptr_t base = (ptr_t)GC_base(obj);
+ if (NULL == base) {
/* We won't collect it, hence finalizer wouldn't be run. */
if (ocd) *ocd = 0;
if (ofn) *ofn = 0;
{
GC_finalization_proc my_old_fn = OFN_UNSET;
void * my_old_cd;
- ptr_t base = GC_base(obj);
- if (0 == base) {
+ ptr_t base = (ptr_t)GC_base(obj);
+ if (NULL == base) {
/* We won't collect it, hence finalizer wouldn't be run. */
if (ocd) *ocd = 0;
if (ofn) *ofn = 0;
{
GC_finalization_proc my_old_fn = OFN_UNSET;
void * my_old_cd;
- ptr_t base = GC_base(obj);
- if (0 == base) {
+ ptr_t base = (ptr_t)GC_base(obj);
+ if (NULL == base) {
/* We won't collect it, hence finalizer wouldn't be run. */
if (ocd) *ocd = 0;
if (ofn) *ofn = 0;