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Updates from 0.2.1 into 0.2.1-inu-1.5

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This commit is contained in:
Akinori Ito
2001-11-09 04:59:17 +00:00
parent 68a07bf03b
commit 6c63633545
246 changed files with 32763 additions and 21814 deletions
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398
gc/dbg_mlc.c
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@@ -2,6 +2,7 @@
* Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
* Copyright (c) 1991-1995 by Xerox Corporation. All rights reserved.
* Copyright (c) 1997 by Silicon Graphics. All rights reserved.
* Copyright (c) 1999-2000 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.
@@ -12,69 +13,26 @@
* provided the above notices are retained, and a notice that the code was
* modified is included with the above copyright notice.
*/
# define I_HIDE_POINTERS
# include "gc_priv.h"
# ifdef KEEP_BACK_PTRS
# include "backptr.h"
# endif
#include "private/dbg_mlc.h"
void GC_default_print_heap_obj_proc();
GC_API void GC_register_finalizer_no_order
GC_PROTO((GC_PTR obj, GC_finalization_proc fn, GC_PTR cd,
GC_finalization_proc *ofn, GC_PTR *ocd));
/* Do we want to and know how to save the call stack at the time of */
/* an allocation? How much space do we want to use in each object? */
# define START_FLAG ((word)0xfedcedcb)
# define END_FLAG ((word)0xbcdecdef)
/* Stored both one past the end of user object, and one before */
/* the end of the object as seen by the allocator. */
/* Object header */
typedef struct {
# ifdef KEEP_BACK_PTRS
ptr_t oh_back_ptr;
# define MARKED_FOR_FINALIZATION (ptr_t)(-1)
/* Object was marked because it is finalizable. */
# ifdef ALIGN_DOUBLE
word oh_dummy;
# endif
# endif
char * oh_string; /* object descriptor string */
word oh_int; /* object descriptor integers */
# ifdef NEED_CALLINFO
struct callinfo oh_ci[NFRAMES];
# endif
word oh_sz; /* Original malloc arg. */
word oh_sf; /* start flag */
} oh;
/* The size of the above structure is assumed not to dealign things, */
/* and to be a multiple of the word length. */
#define DEBUG_BYTES (sizeof (oh) + sizeof (word))
#undef ROUNDED_UP_WORDS
#define ROUNDED_UP_WORDS(n) BYTES_TO_WORDS((n) + WORDS_TO_BYTES(1) - 1)
#ifdef SAVE_CALL_CHAIN
# define ADD_CALL_CHAIN(base, ra) GC_save_callers(((oh *)(base)) -> oh_ci)
# define PRINT_CALL_CHAIN(base) GC_print_callers(((oh *)(base)) -> oh_ci)
#else
# ifdef GC_ADD_CALLER
# define ADD_CALL_CHAIN(base, ra) ((oh *)(base)) -> oh_ci[0].ci_pc = (ra)
# define PRINT_CALL_CHAIN(base) GC_print_callers(((oh *)(base)) -> oh_ci)
# else
# define ADD_CALL_CHAIN(base, ra)
# define PRINT_CALL_CHAIN(base)
# endif
#endif
#ifndef SHORT_DBG_HDRS
/* Check whether object with base pointer p has debugging info */
/* p is assumed to point to a legitimate object in our part */
/* of the heap. */
GC_bool GC_has_debug_info(p)
/* This excludes the check as to whether the back pointer is */
/* odd, which is added by the GC_HAS_DEBUG_INFO macro. */
/* Note that if DBG_HDRS_ALL is set, uncollectable objects */
/* on free lists may not have debug information set. Thus it's */
/* not always safe to return TRUE, even if the client does */
/* its part. */
GC_bool GC_has_other_debug_info(p)
ptr_t p;
{
register oh * ohdr = (oh *)p;
@@ -95,8 +53,19 @@ ptr_t p;
}
return(FALSE);
}
#endif
#ifdef KEEP_BACK_PTRS
# include <stdlib.h>
# if defined(LINUX) || defined(SUNOS4) || defined(SUNOS5) \
|| defined(HPUX) || defined(IRIX) || defined(OSF1)
# define RANDOM() random()
# else
# define RANDOM() (long)rand()
# endif
/* Store back pointer to source in dest, if that appears to be possible. */
/* This is not completely safe, since we may mistakenly conclude that */
/* dest has a debugging wrapper. But the error probability is very */
@@ -105,8 +74,8 @@ ptr_t p;
/* be a pointer to the interior of an object. */
void GC_store_back_pointer(ptr_t source, ptr_t dest)
{
if (GC_has_debug_info(dest)) {
((oh *)dest) -> oh_back_ptr = (ptr_t)HIDE_POINTER(source);
if (GC_HAS_DEBUG_INFO(dest)) {
((oh *)dest) -> oh_back_ptr = HIDE_BACK_PTR(source);
}
}
@@ -116,7 +85,7 @@ ptr_t p;
/* Store information about the object referencing dest in *base_p */
/* and *offset_p. */
/* source is root ==> *base_p = 0, *offset_p = address */
/* source is root ==> *base_p = address, *offset_p = 0 */
/* source is heap object ==> *base_p != 0, *offset_p = offset */
/* Returns 1 on success, 0 if source couldn't be determined. */
/* Dest can be any address within a heap object. */
@@ -125,18 +94,34 @@ ptr_t p;
oh * hdr = (oh *)GC_base(dest);
ptr_t bp;
ptr_t bp_base;
if (!GC_has_debug_info((ptr_t) hdr)) return GC_NO_SPACE;
bp = hdr -> oh_back_ptr;
if (!GC_HAS_DEBUG_INFO((ptr_t) hdr)) return GC_NO_SPACE;
bp = REVEAL_POINTER(hdr -> oh_back_ptr);
if (MARKED_FOR_FINALIZATION == bp) return GC_FINALIZER_REFD;
if (0 == bp) return GC_UNREFERENCED;
bp = REVEAL_POINTER(bp);
if (MARKED_FROM_REGISTER == bp) return GC_REFD_FROM_REG;
if (NOT_MARKED == bp) return GC_UNREFERENCED;
# if ALIGNMENT == 1
/* Heuristically try to fix off by 1 errors we introduced by */
/* insisting on even addresses. */
{
ptr_t alternate_ptr = bp + 1;
ptr_t target = *(ptr_t *)bp;
ptr_t alternate_target = *(ptr_t *)alternate_ptr;
if (alternate_target >= GC_least_plausible_heap_addr
&& alternate_target <= GC_greatest_plausible_heap_addr
&& (target < GC_least_plausible_heap_addr
|| target > GC_greatest_plausible_heap_addr)) {
bp = alternate_ptr;
}
}
# endif
bp_base = GC_base(bp);
if (0 == bp_base) {
*base_p = bp;
*offset_p = 0;
return GC_REFD_FROM_ROOT;
} else {
if (GC_has_debug_info(bp_base)) bp_base += sizeof(oh);
if (GC_HAS_DEBUG_INFO(bp_base)) bp_base += sizeof(oh);
*base_p = bp_base;
*offset_p = bp - bp_base;
return GC_REFD_FROM_HEAP;
@@ -149,7 +134,15 @@ ptr_t p;
void *GC_generate_random_heap_address(void)
{
int i;
int heap_offset = random() % GC_heapsize;
long heap_offset = RANDOM();
if (GC_heapsize > RAND_MAX) {
heap_offset *= RAND_MAX;
heap_offset += RANDOM();
}
heap_offset %= GC_heapsize;
/* This doesn't yield a uniform distribution, especially if */
/* e.g. RAND_MAX = 1.5* GC_heapsize. But for typical cases, */
/* it's not too bad. */
for (i = 0; i < GC_n_heap_sects; ++ i) {
int size = GC_heap_sects[i].hs_bytes;
if (heap_offset < size) {
@@ -177,18 +170,15 @@ ptr_t p;
}
}
/* Force a garbage collection and generate a backtrace from a */
/* random heap address. */
void GC_generate_random_backtrace(void)
/* Print back trace for p */
void GC_print_backtrace(void *p)
{
void * current;
void *current = p;
int i;
void * base;
size_t offset;
GC_ref_kind source;
GC_gcollect();
current = GC_generate_random_valid_address();
GC_printf1("Chose address 0x%lx in object\n", (unsigned long)current);
size_t offset;
void *base;
GC_print_heap_obj(GC_base(current));
GC_err_printf0("\n");
for (i = 0; ; ++i) {
@@ -207,6 +197,9 @@ ptr_t p;
case GC_REFD_FROM_ROOT:
GC_err_printf1("root at 0x%lx\n", (unsigned long)base);
goto out;
case GC_REFD_FROM_REG:
GC_err_printf0("root in register\n");
goto out;
case GC_FINALIZER_REFD:
GC_err_printf0("list of finalizable objects\n");
goto out;
@@ -221,6 +214,17 @@ ptr_t p;
}
out:;
}
/* Force a garbage collection and generate a backtrace from a */
/* random heap address. */
void GC_generate_random_backtrace(void)
{
void * current;
GC_gcollect();
current = GC_generate_random_valid_address();
GC_printf1("Chose address 0x%lx in object\n", (unsigned long)current);
GC_print_backtrace(current);
}
#endif /* KEEP_BACK_PTRS */
@@ -229,7 +233,7 @@ ptr_t p;
ptr_t GC_store_debug_info(p, sz, string, integer)
register ptr_t p; /* base pointer */
word sz; /* bytes */
char * string;
GC_CONST char * string;
word integer;
{
register word * result = (word *)((oh *)p + 1);
@@ -240,18 +244,50 @@ word integer;
/* inconsistent while we're in the handler. */
LOCK();
# ifdef KEEP_BACK_PTRS
((oh *)p) -> oh_back_ptr = 0;
((oh *)p) -> oh_back_ptr = HIDE_BACK_PTR(NOT_MARKED);
# endif
((oh *)p) -> oh_string = string;
((oh *)p) -> oh_int = integer;
((oh *)p) -> oh_sz = sz;
((oh *)p) -> oh_sf = START_FLAG ^ (word)result;
((word *)p)[BYTES_TO_WORDS(GC_size(p))-1] =
result[ROUNDED_UP_WORDS(sz)] = END_FLAG ^ (word)result;
# ifndef SHORT_DBG_HDRS
((oh *)p) -> oh_sz = sz;
((oh *)p) -> oh_sf = START_FLAG ^ (word)result;
((word *)p)[BYTES_TO_WORDS(GC_size(p))-1] =
result[SIMPLE_ROUNDED_UP_WORDS(sz)] = END_FLAG ^ (word)result;
# endif
UNLOCK();
return((ptr_t)result);
}
#ifdef DBG_HDRS_ALL
/* Store debugging info into p. Return displaced pointer. */
/* This version assumes we do hold the allocation lock. */
ptr_t GC_store_debug_info_inner(p, sz, string, integer)
register ptr_t p; /* base pointer */
word sz; /* bytes */
char * string;
word integer;
{
register word * result = (word *)((oh *)p + 1);
/* There is some argument that we should disable signals here. */
/* But that's expensive. And this way things should only appear */
/* inconsistent while we're in the handler. */
# ifdef KEEP_BACK_PTRS
((oh *)p) -> oh_back_ptr = HIDE_BACK_PTR(NOT_MARKED);
# endif
((oh *)p) -> oh_string = string;
((oh *)p) -> oh_int = integer;
# ifndef SHORT_DBG_HDRS
((oh *)p) -> oh_sz = sz;
((oh *)p) -> oh_sf = START_FLAG ^ (word)result;
((word *)p)[BYTES_TO_WORDS(GC_size(p))-1] =
result[SIMPLE_ROUNDED_UP_WORDS(sz)] = END_FLAG ^ (word)result;
# endif
return((ptr_t)result);
}
#endif
#ifndef SHORT_DBG_HDRS
/* Check the object with debugging info at ohdr */
/* return NIL if it's OK. Else return clobbered */
/* address. */
@@ -269,12 +305,13 @@ register oh * ohdr;
if (((word *)ohdr)[BYTES_TO_WORDS(gc_sz)-1] != (END_FLAG ^ (word)body)) {
return((ptr_t)((word *)ohdr + BYTES_TO_WORDS(gc_sz)-1));
}
if (((word *)body)[ROUNDED_UP_WORDS(ohdr -> oh_sz)]
if (((word *)body)[SIMPLE_ROUNDED_UP_WORDS(ohdr -> oh_sz)]
!= (END_FLAG ^ (word)body)) {
return((ptr_t)((word *)body + ROUNDED_UP_WORDS(ohdr -> oh_sz)));
return((ptr_t)((word *)body + SIMPLE_ROUNDED_UP_WORDS(ohdr -> oh_sz)));
}
return(0);
}
#endif /* !SHORT_DBG_HDRS */
void GC_print_obj(p)
ptr_t p;
@@ -283,21 +320,30 @@ ptr_t p;
GC_err_printf1("0x%lx (", ((unsigned long)ohdr + sizeof(oh)));
GC_err_puts(ohdr -> oh_string);
GC_err_printf2(":%ld, sz=%ld)\n", (unsigned long)(ohdr -> oh_int),
(unsigned long)(ohdr -> oh_sz));
# ifdef SHORT_DBG_HDRS
GC_err_printf1(":%ld, sz=%ld)\n", (unsigned long)(ohdr -> oh_int));
# else
GC_err_printf2(":%ld, sz=%ld)\n", (unsigned long)(ohdr -> oh_int),
(unsigned long)(ohdr -> oh_sz));
# endif
PRINT_CALL_CHAIN(ohdr);
}
void GC_debug_print_heap_obj_proc(p)
ptr_t p;
# if defined(__STDC__) || defined(__cplusplus)
void GC_debug_print_heap_obj_proc(ptr_t p)
# else
void GC_debug_print_heap_obj_proc(p)
ptr_t p;
# endif
{
if (GC_has_debug_info(p)) {
if (GC_HAS_DEBUG_INFO(p)) {
GC_print_obj(p);
} else {
GC_default_print_heap_obj_proc(p);
}
}
#ifndef SHORT_DBG_HDRS
void GC_print_smashed_obj(p, clobbered_addr)
ptr_t p, clobbered_addr;
{
@@ -320,12 +366,19 @@ ptr_t p, clobbered_addr;
PRINT_CALL_CHAIN(ohdr);
}
}
#endif
void GC_check_heap_proc();
void GC_check_heap_proc GC_PROTO((void));
void GC_do_nothing() {}
void GC_start_debugging()
{
GC_check_heap = GC_check_heap_proc;
# ifndef SHORT_DBG_HDRS
GC_check_heap = GC_check_heap_proc;
# else
GC_check_heap = GC_do_nothing;
# endif
GC_print_heap_obj = GC_debug_print_heap_obj_proc;
GC_debugging_started = TRUE;
GC_register_displacement((word)sizeof(oh));
@@ -342,16 +395,8 @@ void GC_start_debugging()
GC_register_displacement((word)sizeof(oh) + offset);
}
# ifdef GC_ADD_CALLER
# define EXTRA_ARGS word ra, char * s, int i
# define OPT_RA ra,
# else
# define EXTRA_ARGS char * s, int i
# define OPT_RA
# endif
# ifdef __STDC__
GC_PTR GC_debug_malloc(size_t lb, EXTRA_ARGS)
GC_PTR GC_debug_malloc(size_t lb, GC_EXTRA_PARAMS)
# else
GC_PTR GC_debug_malloc(lb, s, i)
size_t lb;
@@ -378,9 +423,46 @@ void GC_start_debugging()
return (GC_store_debug_info(result, (word)lb, s, (word)i));
}
# 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_PTR GC_debug_generic_malloc_inner(size_t lb, int k)
{
GC_PTR result = GC_generic_malloc_inner(lb + DEBUG_BYTES, k);
if (result == 0) {
GC_err_printf1("GC internal allocation (%ld bytes) returning NIL\n",
(unsigned long) lb);
return(0);
}
ADD_CALL_CHAIN(result, ra);
return (GC_store_debug_info_inner(result, (word)lb, "INTERNAL", (word)0));
}
GC_PTR GC_debug_generic_malloc_inner_ignore_off_page(size_t lb, int k)
{
GC_PTR result = GC_generic_malloc_inner_ignore_off_page(
lb + DEBUG_BYTES, k);
if (result == 0) {
GC_err_printf1("GC internal allocation (%ld bytes) returning NIL\n",
(unsigned long) lb);
return(0);
}
ADD_CALL_CHAIN(result, ra);
return (GC_store_debug_info_inner(result, (word)lb, "INTERNAL", (word)0));
}
# endif
#ifdef STUBBORN_ALLOC
# ifdef __STDC__
GC_PTR GC_debug_malloc_stubborn(size_t lb, EXTRA_ARGS)
GC_PTR GC_debug_malloc_stubborn(size_t lb, GC_EXTRA_PARAMS)
# else
GC_PTR GC_debug_malloc_stubborn(lb, s, i)
size_t lb;
@@ -444,10 +526,34 @@ GC_PTR p;
GC_end_stubborn_change(q);
}
#endif /* STUBBORN_ALLOC */
#else /* !STUBBORN_ALLOC */
# ifdef __STDC__
GC_PTR GC_debug_malloc_atomic(size_t lb, EXTRA_ARGS)
GC_PTR GC_debug_malloc_stubborn(size_t lb, GC_EXTRA_PARAMS)
# else
GC_PTR GC_debug_malloc_stubborn(lb, s, i)
size_t lb;
char * s;
int i;
# endif
{
return GC_debug_malloc(lb, OPT_RA s, i);
}
void GC_debug_change_stubborn(p)
GC_PTR p;
{
}
void GC_debug_end_stubborn_change(p)
GC_PTR p;
{
}
#endif /* !STUBBORN_ALLOC */
# ifdef __STDC__
GC_PTR GC_debug_malloc_atomic(size_t lb, GC_EXTRA_PARAMS)
# else
GC_PTR GC_debug_malloc_atomic(lb, s, i)
size_t lb;
@@ -472,7 +578,7 @@ GC_PTR p;
}
# ifdef __STDC__
GC_PTR GC_debug_malloc_uncollectable(size_t lb, EXTRA_ARGS)
GC_PTR GC_debug_malloc_uncollectable(size_t lb, GC_EXTRA_PARAMS)
# else
GC_PTR GC_debug_malloc_uncollectable(lb, s, i)
size_t lb;
@@ -498,7 +604,7 @@ GC_PTR p;
#ifdef ATOMIC_UNCOLLECTABLE
# ifdef __STDC__
GC_PTR GC_debug_malloc_atomic_uncollectable(size_t lb, EXTRA_ARGS)
GC_PTR GC_debug_malloc_atomic_uncollectable(size_t lb, GC_EXTRA_PARAMS)
# else
GC_PTR GC_debug_malloc_atomic_uncollectable(lb, s, i)
size_t lb;
@@ -531,31 +637,35 @@ GC_PTR p;
GC_PTR p;
# endif
{
register GC_PTR base = GC_base(p);
register GC_PTR base;
register ptr_t clobbered;
if (0 == p) return;
base = GC_base(p);
if (base == 0) {
GC_err_printf1("Attempt to free invalid pointer %lx\n",
(unsigned long)p);
if (p != 0) ABORT("free(invalid pointer)");
ABORT("free(invalid pointer)");
}
if ((ptr_t)p - (ptr_t)base != sizeof(oh)) {
GC_err_printf1(
"GC_debug_free called on pointer %lx wo debugging info\n",
(unsigned long)p);
} else {
clobbered = GC_check_annotated_obj((oh *)base);
if (clobbered != 0) {
if (((oh *)base) -> oh_sz == GC_size(base)) {
# ifndef SHORT_DBG_HDRS
clobbered = GC_check_annotated_obj((oh *)base);
if (clobbered != 0) {
if (((oh *)base) -> oh_sz == GC_size(base)) {
GC_err_printf0(
"GC_debug_free: found previously deallocated (?) object at ");
} else {
} else {
GC_err_printf0("GC_debug_free: found smashed location at ");
}
GC_print_smashed_obj(p, clobbered);
}
GC_print_smashed_obj(p, clobbered);
}
/* Invalidate size */
((oh *)base) -> oh_sz = GC_size(base);
/* Invalidate size */
((oh *)base) -> oh_sz = GC_size(base);
# endif /* SHORT_DBG_HDRS */
}
if (GC_find_leak) {
GC_free(base);
@@ -575,8 +685,19 @@ GC_PTR p;
} /* !GC_find_leak */
}
#ifdef THREADS
extern void GC_free_inner(GC_PTR p);
/* Used internally; we assume it's called correctly. */
void GC_debug_free_inner(GC_PTR p)
{
GC_free_inner(GC_base(p));
}
#endif
# ifdef __STDC__
GC_PTR GC_debug_realloc(GC_PTR p, size_t lb, EXTRA_ARGS)
GC_PTR GC_debug_realloc(GC_PTR p, size_t lb, GC_EXTRA_PARAMS)
# else
GC_PTR GC_debug_realloc(p, lb, s, i)
GC_PTR p;
@@ -629,12 +750,16 @@ GC_PTR p;
GC_err_printf0("GC_debug_realloc: encountered bad kind\n");
ABORT("bad kind");
}
clobbered = GC_check_annotated_obj((oh *)base);
if (clobbered != 0) {
# ifdef SHORT_DBG_HDRS
old_sz = GC_size(base) - sizeof(oh);
# else
clobbered = GC_check_annotated_obj((oh *)base);
if (clobbered != 0) {
GC_err_printf0("GC_debug_realloc: found smashed location at ");
GC_print_smashed_obj(p, clobbered);
}
old_sz = ((oh *)base) -> oh_sz;
}
old_sz = ((oh *)base) -> oh_sz;
# endif
if (old_sz < copy_sz) copy_sz = old_sz;
if (result == 0) return(0);
BCOPY(p, result, copy_sz);
@@ -642,11 +767,16 @@ GC_PTR p;
return(result);
}
#ifndef SHORT_DBG_HDRS
/* Check all marked objects in the given block for validity */
/*ARGSUSED*/
void GC_check_heap_block(hbp, dummy)
register struct hblk *hbp; /* ptr to current heap block */
word dummy;
# if defined(__STDC__) || defined(__cplusplus)
void GC_check_heap_block(register struct hblk *hbp, word dummy)
# else
void GC_check_heap_block(hbp, dummy)
register struct hblk *hbp; /* ptr to current heap block */
word dummy;
# endif
{
register struct hblkhdr * hhdr = HDR(hbp);
register word sz = hhdr -> hb_sz;
@@ -654,7 +784,7 @@ word dummy;
register word *p, *plim;
p = (word *)(hbp->hb_body);
word_no = HDR_WORDS;
word_no = 0;
if (sz > MAXOBJSZ) {
plim = p;
} else {
@@ -663,7 +793,7 @@ word dummy;
/* go through all words in block */
while( p <= plim ) {
if( mark_bit_from_hdr(hhdr, word_no)
&& GC_has_debug_info((ptr_t)p)) {
&& GC_HAS_DEBUG_INFO((ptr_t)p)) {
ptr_t clobbered = GC_check_annotated_obj((oh *)p);
if (clobbered != 0) {
@@ -690,6 +820,8 @@ void GC_check_heap_proc()
GC_apply_to_all_blocks(GC_check_heap_block, (word)0);
}
#endif /* !SHORT_DBG_HDRS */
struct closure {
GC_finalization_proc cl_fn;
GC_PTR cl_data;
@@ -704,7 +836,12 @@ struct closure {
# endif
{
struct closure * result =
(struct closure *) GC_malloc(sizeof (struct closure));
# ifdef DBG_HDRS_ALL
(struct closure *) GC_debug_malloc(sizeof (struct closure),
GC_EXTRAS);
# else
(struct closure *) GC_malloc(sizeof (struct closure));
# endif
result -> cl_fn = fn;
result -> cl_data = data;
@@ -797,3 +934,22 @@ struct closure {
GC_register_finalizer_ignore_self(base, GC_debug_invoke_finalizer,
GC_make_closure(fn,cd), ofn, ocd);
}
#ifdef GC_ADD_CALLER
# define RA GC_RETURN_ADDR,
#else
# define RA
#endif
GC_PTR GC_debug_malloc_replacement(lb)
size_t lb;
{
return GC_debug_malloc(lb, RA "unknown", 0);
}
GC_PTR GC_debug_realloc_replacement(p, lb)
GC_PTR p;
size_t lb;
{
return GC_debug_realloc(p, lb, RA "unknown", 0);
}