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Diffstat (limited to 'graphics/asymptote/gc/dbg_mlc.c')
-rw-r--r--graphics/asymptote/gc/dbg_mlc.c1210
1 files changed, 1210 insertions, 0 deletions
diff --git a/graphics/asymptote/gc/dbg_mlc.c b/graphics/asymptote/gc/dbg_mlc.c
new file mode 100644
index 0000000000..2c3c35676b
--- /dev/null
+++ b/graphics/asymptote/gc/dbg_mlc.c
@@ -0,0 +1,1210 @@
+/*
+ * 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) 1999-2004 Hewlett-Packard Development Company, L.P.
+ * Copyright (C) 2007 Free Software Foundation, Inc
+ *
+ * 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/dbg_mlc.h"
+
+#ifndef MSWINCE
+# include <errno.h>
+#endif
+#include <string.h>
+
+#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. */
+ /* 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, uncollectible objects */
+ /* on free lists may not have debug information set. Thus it's */
+ /* not always safe to return TRUE (1), even if the client does */
+ /* its part. Return -1 if the object with debug info has been */
+ /* marked as deallocated. */
+ GC_INNER int GC_has_other_debug_info(ptr_t p)
+ {
+ ptr_t body = (ptr_t)((oh *)p + 1);
+ word sz = GC_size(p);
+
+ if (HBLKPTR(p) != HBLKPTR((ptr_t)body)
+ || sz < DEBUG_BYTES + EXTRA_BYTES) {
+ return 0;
+ }
+ if (((oh *)p) -> oh_sf != (START_FLAG ^ (word)body)
+ && ((word *)p)[BYTES_TO_WORDS(sz)-1] != (END_FLAG ^ (word)body)) {
+ return 0;
+ }
+ if (((oh *)p)->oh_sz == sz) {
+ /* Object may have had debug info, but has been deallocated */
+ return -1;
+ }
+ return 1;
+ }
+#endif /* !SHORT_DBG_HDRS */
+
+#ifdef KEEP_BACK_PTRS
+
+ /* Use a custom trivial random() implementation as the standard */
+ /* one might lead to crashes (if used from a multi-threaded code) */
+ /* or to a compiler warning about the deterministic result. */
+ static int GC_rand(void)
+ {
+ static GC_RAND_STATE_T seed;
+
+ return GC_RAND_NEXT(&seed);
+ }
+
+# define RANDOM() (long)GC_rand()
+
+ /* 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 */
+ /* small, and this shouldn't be used in production code. */
+ /* We assume that dest is the real base pointer. Source will usually */
+ /* be a pointer to the interior of an object. */
+ GC_INNER void GC_store_back_pointer(ptr_t source, ptr_t dest)
+ {
+ if (GC_HAS_DEBUG_INFO(dest)) {
+# 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
+ }
+ }
+
+ GC_INNER void GC_marked_for_finalization(ptr_t dest)
+ {
+ GC_store_back_pointer(MARKED_FOR_FINALIZATION, dest);
+ }
+
+ /* Store information about the object referencing dest in *base_p */
+ /* and *offset_p. */
+ /* source is root ==> *base_p = address, *offset_p = 0 */
+ /* source is heap object ==> *base_p != 0, *offset_p = offset */
+ /* Dest can be any address within a heap object. */
+ GC_API GC_ref_kind GC_CALL GC_get_back_ptr_info(void *dest, void **base_p,
+ size_t *offset_p)
+ {
+ oh * hdr = (oh *)GC_base(dest);
+ ptr_t bp;
+ ptr_t bp_base;
+
+# ifdef LINT2
+ /* Explicitly instruct the code analysis tool that */
+ /* GC_get_back_ptr_info is not expected to be called with an */
+ /* incorrect "dest" value. */
+ if (!hdr) ABORT("Invalid GC_get_back_ptr_info argument");
+# endif
+ if (!GC_HAS_DEBUG_INFO((ptr_t) hdr)) return GC_NO_SPACE;
+ 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;
+# 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 ((word)alternate_target > GC_least_real_heap_addr
+ && (word)alternate_target < GC_greatest_real_heap_addr
+ && ((word)target <= GC_least_real_heap_addr
+ || (word)target >= GC_greatest_real_heap_addr)) {
+ bp = alternate_ptr;
+ }
+ }
+# endif
+ bp_base = (ptr_t)GC_base(bp);
+ if (NULL == 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);
+ *base_p = bp_base;
+ *offset_p = bp - bp_base;
+ return GC_REFD_FROM_HEAP;
+ }
+ }
+
+ /* Generate a random heap address. */
+ /* The resulting address is in the heap, but */
+ /* not necessarily inside a valid object. */
+ GC_API void * GC_CALL GC_generate_random_heap_address(void)
+ {
+ size_t i;
+ word heap_offset = (word)RANDOM();
+
+ if (GC_heapsize > (word)GC_RAND_MAX) {
+ heap_offset *= GC_RAND_MAX;
+ heap_offset += (word)RANDOM();
+ }
+ heap_offset %= GC_heapsize;
+ /* This doesn't yield a uniform distribution, especially if */
+ /* e.g. RAND_MAX is 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");
+
+ size = GC_heap_sects[i].hs_bytes;
+ if (heap_offset < size) {
+ break;
+ } else {
+ heap_offset -= size;
+ }
+ }
+ return GC_heap_sects[i].hs_start + heap_offset;
+ }
+
+ /* Generate a random address inside a valid marked heap object. */
+ GC_API void * GC_CALL GC_generate_random_valid_address(void)
+ {
+ ptr_t result;
+ ptr_t base;
+ do {
+ result = (ptr_t)GC_generate_random_heap_address();
+ base = (ptr_t)GC_base(result);
+ } while (NULL == base || !GC_is_marked(base));
+ return result;
+ }
+
+ /* Print back trace for p */
+ GC_API void GC_CALL GC_print_backtrace(void *p)
+ {
+ void *current = p;
+ int i;
+ GC_ref_kind source;
+ size_t offset;
+ void *base;
+
+ GC_print_heap_obj((ptr_t)GC_base(current));
+
+ for (i = 0; ; ++i) {
+ source = GC_get_back_ptr_info(current, &base, &offset);
+ if (GC_UNREFERENCED == source) {
+ GC_err_printf("Reference could not be found\n");
+ goto out;
+ }
+ if (GC_NO_SPACE == source) {
+ GC_err_printf("No debug info in object: Can't find reference\n");
+ goto out;
+ }
+ GC_err_printf("Reachable via %d levels of pointers from ", i);
+ switch(source) {
+ case GC_REFD_FROM_ROOT:
+ GC_err_printf("root at %p\n\n", base);
+ goto out;
+ case GC_REFD_FROM_REG:
+ GC_err_printf("root in register\n\n");
+ goto out;
+ case GC_FINALIZER_REFD:
+ GC_err_printf("list of finalizable objects\n\n");
+ goto out;
+ 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((ptr_t)GC_base(base));
+ break;
+ default:
+ GC_err_printf("INTERNAL ERROR: UNEXPECTED SOURCE!!!!\n");
+ goto out;
+ }
+ current = base;
+ }
+ out:;
+ }
+
+ GC_API void GC_CALL GC_generate_random_backtrace(void)
+ {
+ void *current;
+ DCL_LOCK_STATE;
+
+ if (GC_try_to_collect(GC_never_stop_func) == 0) {
+ GC_err_printf("Cannot generate a backtrace: "
+ "garbage collection is disabled!\n");
+ return;
+ }
+
+ /* Generate/print a backtrace from a random heap address. */
+ LOCK();
+ current = GC_generate_random_valid_address();
+ UNLOCK();
+ GC_printf("\n****Chosen address %p in object\n", current);
+ GC_print_backtrace(current);
+ }
+
+#endif /* KEEP_BACK_PTRS */
+
+# define CROSSES_HBLK(p, sz) \
+ (((word)((p) + sizeof(oh) + (sz) - 1) ^ (word)(p)) >= HBLKSIZE)
+
+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((ptr_t)p, sz)));
+# ifdef KEEP_BACK_PTRS
+ ((oh *)p) -> oh_back_ptr = HIDE_BACK_PTR(NOT_MARKED);
+# endif
+# ifdef MAKE_BACK_GRAPH
+ ((oh *)p) -> oh_bg_ptr = HIDE_BACK_PTR((ptr_t)0);
+# endif
+ ((oh *)p) -> oh_string = string;
+ ((oh *)p) -> oh_int = linenum;
+# 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 result;
+}
+
+/* Check the allocation is successful, store debugging info into p, */
+/* start the debugging mode (if not yet), and return displaced pointer. */
+static void *store_debug_info(void *p, size_t lb,
+ const char *fn, GC_EXTRA_PARAMS)
+{
+ 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();
+ if (!GC_debugging_started)
+ GC_start_debugging_inner();
+ result = GC_store_debug_info_inner(p, (word)lb, s, i);
+ ADD_CALL_CHAIN(p, ra);
+ UNLOCK();
+ return result;
+}
+
+#ifndef SHORT_DBG_HDRS
+ /* Check the object with debugging info at ohdr. */
+ /* Return NULL if it's OK. Else return clobbered */
+ /* address. */
+ STATIC ptr_t GC_check_annotated_obj(oh *ohdr)
+ {
+ ptr_t body = (ptr_t)(ohdr + 1);
+ word gc_sz = GC_size((ptr_t)ohdr);
+ if (ohdr -> oh_sz + DEBUG_BYTES > gc_sz) {
+ return((ptr_t)(&(ohdr -> oh_sz)));
+ }
+ if (ohdr -> oh_sf != (START_FLAG ^ (word)body)) {
+ return((ptr_t)(&(ohdr -> oh_sf)));
+ }
+ 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)[SIMPLE_ROUNDED_UP_WORDS(ohdr -> oh_sz)]
+ != (END_FLAG ^ (word)body)) {
+ return (ptr_t)(&((word *)body)[SIMPLE_ROUNDED_UP_WORDS(ohdr->oh_sz)]);
+ }
+ return(0);
+ }
+#endif /* !SHORT_DBG_HDRS */
+
+STATIC GC_describe_type_fn GC_describe_type_fns[MAXOBJKINDS] = {0};
+
+GC_API void GC_CALL GC_register_describe_type_fn(int kind,
+ GC_describe_type_fn fn)
+{
+ GC_describe_type_fns[kind] = fn;
+}
+
+#define GET_OH_LINENUM(ohdr) ((int)(ohdr)->oh_int)
+
+#ifndef SHORT_DBG_HDRS
+# define IF_NOT_SHORTDBG_HDRS(x) x
+# define COMMA_IFNOT_SHORTDBG_HDRS(x) /* comma */, x
+#else
+# define IF_NOT_SHORTDBG_HDRS(x) /* empty */
+# define COMMA_IFNOT_SHORTDBG_HDRS(x) /* empty */
+#endif
+
+/* Print a human-readable description of the object to stderr. */
+/* p points to somewhere inside an object with the debugging info. */
+STATIC void GC_print_obj(ptr_t p)
+{
+ oh * ohdr = (oh *)GC_base(p);
+ ptr_t q;
+ hdr * hhdr;
+ int kind;
+ const char *kind_str;
+ char buffer[GC_TYPE_DESCR_LEN + 1];
+
+ GC_ASSERT(I_DONT_HOLD_LOCK());
+# ifdef LINT2
+ if (!ohdr) ABORT("Invalid GC_print_obj argument");
+# endif
+
+ q = (ptr_t)(ohdr + 1);
+ /* Print a type description for the object whose client-visible */
+ /* address is q. */
+ hhdr = GC_find_header(q);
+ kind = hhdr -> hb_obj_kind;
+ if (0 != GC_describe_type_fns[kind] && GC_is_marked(ohdr)) {
+ /* This should preclude free list objects except with */
+ /* thread-local allocation. */
+ buffer[GC_TYPE_DESCR_LEN] = 0;
+ (GC_describe_type_fns[kind])(q, buffer);
+ GC_ASSERT(buffer[GC_TYPE_DESCR_LEN] == 0);
+ kind_str = buffer;
+ } else {
+ switch(kind) {
+ case PTRFREE:
+ kind_str = "PTRFREE";
+ break;
+ case NORMAL:
+ kind_str = "NORMAL";
+ break;
+ case UNCOLLECTABLE:
+ kind_str = "UNCOLLECTABLE";
+ break;
+# ifdef GC_ATOMIC_UNCOLLECTABLE
+ case AUNCOLLECTABLE:
+ kind_str = "ATOMIC_UNCOLLECTABLE";
+ break;
+# endif
+ default:
+ kind_str = NULL;
+ /* The alternative is to use snprintf(buffer) but it is */
+ /* not quite portable (see vsnprintf in misc.c). */
+ }
+ }
+
+ if (NULL != kind_str) {
+ GC_err_printf("%p (%s:%d," IF_NOT_SHORTDBG_HDRS(" sz= %lu,") " %s)\n",
+ (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",
+ (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);
+ }
+ PRINT_CALL_CHAIN(ohdr);
+}
+
+STATIC void GC_debug_print_heap_obj_proc(ptr_t p)
+{
+ GC_ASSERT(I_DONT_HOLD_LOCK());
+ if (GC_HAS_DEBUG_INFO(p)) {
+ GC_print_obj(p);
+ } else {
+ GC_default_print_heap_obj_proc(p);
+ }
+}
+
+#ifndef SHORT_DBG_HDRS
+ /* 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, void *p,
+ ptr_t clobbered_addr)
+ {
+ oh * ohdr = (oh *)GC_base(p);
+
+ GC_ASSERT(I_DONT_HOLD_LOCK());
+# ifdef LINT2
+ if (!ohdr) ABORT("Invalid GC_print_smashed_obj argument");
+# endif
+ if ((word)clobbered_addr <= (word)(&ohdr->oh_sz)
+ || ohdr -> oh_string == 0) {
+ GC_err_printf(
+ "%s %p in or near object at %p(<smashed>, appr. sz= %lu)\n",
+ 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, (void *)clobbered_addr, p,
+ (word)(ohdr -> oh_string) < HBLKSIZE ? "(smashed string)" :
+ ohdr -> oh_string[0] == '\0' ? "EMPTY(smashed?)" :
+ ohdr -> oh_string,
+ GET_OH_LINENUM(ohdr), (unsigned long)(ohdr -> oh_sz));
+ PRINT_CALL_CHAIN(ohdr);
+ }
+ }
+
+ STATIC void GC_check_heap_proc (void);
+ STATIC void GC_print_all_smashed_proc (void);
+#else
+ STATIC void GC_do_nothing(void) {}
+#endif
+
+GC_INNER void GC_start_debugging_inner(void)
+{
+ GC_ASSERT(I_HOLD_LOCK());
+# ifndef SHORT_DBG_HDRS
+ GC_check_heap = GC_check_heap_proc;
+ GC_print_all_smashed = GC_print_all_smashed_proc;
+# else
+ GC_check_heap = GC_do_nothing;
+ GC_print_all_smashed = GC_do_nothing;
+# endif
+ GC_print_heap_obj = GC_debug_print_heap_obj_proc;
+ GC_debugging_started = TRUE;
+ GC_register_displacement_inner((word)sizeof(oh));
+# if defined(CPPCHECK)
+ GC_noop1(GC_debug_header_size);
+# endif
+}
+
+const size_t GC_debug_header_size = sizeof(oh);
+
+GC_API size_t GC_CALL GC_get_debug_header_size(void) {
+ return sizeof(oh);
+}
+
+GC_API void GC_CALL GC_debug_register_displacement(size_t offset)
+{
+ DCL_LOCK_STATE;
+
+ LOCK();
+ GC_register_displacement_inner(offset);
+ GC_register_displacement_inner((word)sizeof(oh) + offset);
+ UNLOCK();
+}
+
+#ifdef GC_ADD_CALLER
+# 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)
+ {
+ Dl_info caller;
+
+ if (ad && dladdr((void *)ad, &caller) && caller.dli_sname != NULL) {
+ *symp = caller.dli_sname;
+ *offp = (int)((char *)ad - (char *)caller.dli_saddr);
+ }
+ if (NULL == *symp) {
+ *symp = "unknown";
+ }
+ }
+# else
+# define GC_caller_func_offset(ad, symp, offp) (void)(*(symp) = "unknown")
+# endif
+#endif /* GC_ADD_CALLER */
+
+GC_API GC_ATTR_MALLOC void * GC_CALL GC_debug_malloc(size_t lb,
+ GC_EXTRA_PARAMS)
+{
+ void * result;
+
+ /* 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. */
+# if defined(_FORTIFY_SOURCE) && !defined(__clang__)
+ /* Workaround to avoid "exceeds maximum object size" gcc warning. */
+ result = GC_malloc(lb < GC_SIZE_MAX - DEBUG_BYTES ? lb + DEBUG_BYTES
+ : GC_SIZE_MAX >> 1);
+# else
+ result = GC_malloc(SIZET_SAT_ADD(lb, DEBUG_BYTES));
+# endif
+# ifdef GC_ADD_CALLER
+ if (s == NULL) {
+ GC_caller_func_offset(ra, &s, &i);
+ }
+# endif
+ return store_debug_info(result, lb, "GC_debug_malloc", OPT_RA s, i);
+}
+
+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(SIZET_SAT_ADD(lb, DEBUG_BYTES));
+
+ return store_debug_info(result, lb, "GC_debug_malloc_ignore_off_page",
+ OPT_RA s, i);
+}
+
+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(
+ SIZET_SAT_ADD(lb, DEBUG_BYTES));
+
+ return store_debug_info(result, lb,
+ "GC_debug_malloc_atomic_ignore_off_page",
+ OPT_RA s, i);
+}
+
+STATIC void * GC_debug_generic_malloc(size_t lb, int knd, GC_EXTRA_PARAMS)
+{
+ void * result = GC_generic_malloc(SIZET_SAT_ADD(lb, DEBUG_BYTES), knd);
+
+ return store_debug_info(result, lb, "GC_debug_generic_malloc",
+ OPT_RA s, 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. */
+ GC_INNER void * GC_debug_generic_malloc_inner(size_t lb, int k)
+ {
+ void *base, *result;
+
+ GC_ASSERT(I_HOLD_LOCK());
+ base = GC_generic_malloc_inner(SIZET_SAT_ADD(lb, DEBUG_BYTES), k);
+ if (NULL == base) {
+ GC_err_printf("GC internal allocation (%lu bytes) returning NULL\n",
+ (unsigned long) lb);
+ return(0);
+ }
+ if (!GC_debugging_started) {
+ GC_start_debugging_inner();
+ }
+ result = GC_store_debug_info_inner(base, (word)lb, "INTERNAL", 0);
+ ADD_CALL_CHAIN(base, GC_RETURN_ADDR);
+ return result;
+ }
+
+ GC_INNER void * GC_debug_generic_malloc_inner_ignore_off_page(size_t lb,
+ int k)
+ {
+ void *base, *result;
+
+ GC_ASSERT(I_HOLD_LOCK());
+ base = GC_generic_malloc_inner_ignore_off_page(
+ SIZET_SAT_ADD(lb, DEBUG_BYTES), k);
+ if (NULL == base) {
+ GC_err_printf("GC internal allocation (%lu bytes) returning NULL\n",
+ (unsigned long) lb);
+ return(0);
+ }
+ if (!GC_debugging_started) {
+ GC_start_debugging_inner();
+ }
+ result = GC_store_debug_info_inner(base, (word)lb, "INTERNAL", 0);
+ ADD_CALL_CHAIN_INNER(base);
+ return result;
+ }
+#endif /* DBG_HDRS_ALL */
+
+#ifndef CPPCHECK
+ GC_API void * GC_CALL GC_debug_malloc_stubborn(size_t lb, GC_EXTRA_PARAMS)
+ {
+ return GC_debug_malloc(lb, OPT_RA s, i);
+ }
+
+ GC_API void GC_CALL GC_debug_change_stubborn(
+ const void * p GC_ATTR_UNUSED) {}
+#endif /* !CPPCHECK */
+
+GC_API void GC_CALL GC_debug_end_stubborn_change(const void *p)
+{
+ const void * q = GC_base_C(p);
+
+ if (NULL == q) {
+ ABORT_ARG1("GC_debug_end_stubborn_change: bad arg", ": %p", p);
+ }
+ GC_end_stubborn_change(q);
+}
+
+GC_API void GC_CALL GC_debug_ptr_store_and_dirty(void *p, const void *q)
+{
+ *(void **)GC_is_visible(p) = GC_is_valid_displacement((void *)q);
+ GC_debug_end_stubborn_change(p);
+ REACHABLE_AFTER_DIRTY(q);
+}
+
+GC_API GC_ATTR_MALLOC void * GC_CALL GC_debug_malloc_atomic(size_t lb,
+ GC_EXTRA_PARAMS)
+{
+ void * result = GC_malloc_atomic(SIZET_SAT_ADD(lb, DEBUG_BYTES));
+
+ return store_debug_info(result, lb, "GC_debug_malloc_atomic",
+ OPT_RA s, i);
+}
+
+GC_API GC_ATTR_MALLOC char * GC_CALL GC_debug_strdup(const char *str,
+ GC_EXTRA_PARAMS)
+{
+ char *copy;
+ size_t lb;
+ if (str == NULL) {
+ if (GC_find_leak)
+ GC_err_printf("strdup(NULL) behavior is undefined\n");
+ return NULL;
+ }
+
+ lb = strlen(str) + 1;
+ copy = (char *)GC_debug_malloc_atomic(lb, OPT_RA s, i);
+ if (copy == NULL) {
+# ifndef MSWINCE
+ errno = ENOMEM;
+# endif
+ return NULL;
+ }
+ BCOPY(str, copy, lb);
+ return copy;
+}
+
+GC_API GC_ATTR_MALLOC char * GC_CALL GC_debug_strndup(const char *str,
+ size_t size, GC_EXTRA_PARAMS)
+{
+ char *copy;
+ size_t len = strlen(str); /* str is expected to be non-NULL */
+ if (len > size)
+ len = size;
+ copy = (char *)GC_debug_malloc_atomic(len + 1, OPT_RA s, i);
+ if (copy == NULL) {
+# ifndef MSWINCE
+ errno = ENOMEM;
+# endif
+ return NULL;
+ }
+ if (len > 0)
+ BCOPY(str, copy, len);
+ copy[len] = '\0';
+ return copy;
+}
+
+#ifdef GC_REQUIRE_WCSDUP
+# include <wchar.h> /* for wcslen() */
+
+ GC_API GC_ATTR_MALLOC wchar_t * GC_CALL GC_debug_wcsdup(const wchar_t *str,
+ GC_EXTRA_PARAMS)
+ {
+ size_t lb = (wcslen(str) + 1) * sizeof(wchar_t);
+ wchar_t *copy = (wchar_t *)GC_debug_malloc_atomic(lb, OPT_RA s, i);
+ if (copy == NULL) {
+# ifndef MSWINCE
+ errno = ENOMEM;
+# endif
+ return NULL;
+ }
+ BCOPY(str, copy, lb);
+ return copy;
+ }
+#endif /* GC_REQUIRE_WCSDUP */
+
+GC_API GC_ATTR_MALLOC void * GC_CALL GC_debug_malloc_uncollectable(size_t lb,
+ GC_EXTRA_PARAMS)
+{
+ void * result = GC_malloc_uncollectable(
+ SIZET_SAT_ADD(lb, UNCOLLECTABLE_DEBUG_BYTES));
+
+ return store_debug_info(result, lb, "GC_debug_malloc_uncollectable",
+ OPT_RA s, i);
+}
+
+#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(
+ SIZET_SAT_ADD(lb, UNCOLLECTABLE_DEBUG_BYTES));
+
+ return store_debug_info(result, lb,
+ "GC_debug_malloc_atomic_uncollectable",
+ OPT_RA s, i);
+ }
+#endif /* GC_ATOMIC_UNCOLLECTABLE */
+
+#ifndef GC_FREED_MEM_MARKER
+# if CPP_WORDSZ == 32
+# define GC_FREED_MEM_MARKER 0xdeadbeef
+# else
+# define GC_FREED_MEM_MARKER GC_WORD_C(0xEFBEADDEdeadbeef)
+# endif
+#endif
+
+GC_API void GC_CALL GC_debug_free(void * p)
+{
+ ptr_t base;
+ if (0 == p) return;
+
+ 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 {
+# ifndef SHORT_DBG_HDRS
+ ptr_t clobbered = GC_check_annotated_obj((oh *)base);
+ word sz = GC_size(base);
+ if (clobbered != 0) {
+ GC_SET_HAVE_ERRORS(); /* no "release" barrier is needed */
+ if (((oh *)base) -> oh_sz == sz) {
+ GC_print_smashed_obj(
+ "GC_debug_free: found previously deallocated (?) object at",
+ p, clobbered);
+ return; /* ignore double free */
+ } else {
+ GC_print_smashed_obj("GC_debug_free: found smashed location at",
+ p, clobbered);
+ }
+ }
+ /* Invalidate size (mark the object as deallocated) */
+ ((oh *)base) -> oh_sz = sz;
+# endif /* !SHORT_DBG_HDRS */
+ }
+ if (GC_find_leak
+# ifndef SHORT_DBG_HDRS
+ && ((ptr_t)p - (ptr_t)base != sizeof(oh) || !GC_findleak_delay_free)
+# endif
+ ) {
+ GC_free(base);
+ } else {
+ hdr * hhdr = HDR(p);
+ if (hhdr -> hb_obj_kind == UNCOLLECTABLE
+# ifdef GC_ATOMIC_UNCOLLECTABLE
+ || hhdr -> hb_obj_kind == AUNCOLLECTABLE
+# endif
+ ) {
+ GC_free(base);
+ } else {
+ word i;
+ word sz = hhdr -> hb_sz;
+ word obj_sz = BYTES_TO_WORDS(sz - sizeof(oh));
+
+ for (i = 0; i < obj_sz; ++i)
+ ((word *)p)[i] = GC_FREED_MEM_MARKER;
+ GC_ASSERT((word *)p + i == (word *)(base + sz));
+ /* Update the counter even though the real deallocation */
+ /* is deferred. */
+ LOCK();
+ GC_bytes_freed += sz;
+ UNLOCK();
+ }
+ } /* !GC_find_leak */
+}
+
+#if defined(THREADS) && defined(DBG_HDRS_ALL)
+ /* Used internally; we assume it's called correctly. */
+ GC_INNER void GC_debug_free_inner(void * 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");
+# endif
+# ifndef SHORT_DBG_HDRS
+ /* Invalidate size */
+ ((oh *)base) -> oh_sz = GC_size(base);
+# endif
+ GC_free_inner(base);
+ }
+#endif
+
+GC_API void * GC_CALL GC_debug_realloc(void * p, size_t lb, GC_EXTRA_PARAMS)
+{
+ void * base;
+ void * result;
+ hdr * hhdr;
+
+ 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);
+ }
+# endif
+ base = GC_base(p);
+ if (base == 0) {
+ ABORT_ARG1("Invalid pointer passed to realloc()", ": %p", p);
+ }
+ if ((ptr_t)p - (ptr_t)base != sizeof(oh)) {
+ GC_err_printf(
+ "GC_debug_realloc called on pointer %p w/o debugging info\n", p);
+ return(GC_realloc(p, lb));
+ }
+ hhdr = HDR(base);
+ switch (hhdr -> hb_obj_kind) {
+ case NORMAL:
+ result = GC_debug_malloc(lb, OPT_RA s, i);
+ break;
+ case PTRFREE:
+ result = GC_debug_malloc_atomic(lb, OPT_RA s, i);
+ break;
+ case UNCOLLECTABLE:
+ result = GC_debug_malloc_uncollectable(lb, OPT_RA s, i);
+ break;
+# ifdef GC_ATOMIC_UNCOLLECTABLE
+ case AUNCOLLECTABLE:
+ result = GC_debug_malloc_atomic_uncollectable(lb, OPT_RA s, i);
+ break;
+# endif
+ default:
+ result = GC_debug_generic_malloc(lb, hhdr -> hb_obj_kind, OPT_RA s, i);
+ break;
+ }
+
+ if (result != NULL) {
+ size_t old_sz;
+# ifdef SHORT_DBG_HDRS
+ old_sz = GC_size(base) - sizeof(oh);
+# else
+ old_sz = ((oh *)base) -> oh_sz;
+# endif
+ if (old_sz > 0)
+ BCOPY(p, result, old_sz < lb ? old_sz : lb);
+ GC_debug_free(p);
+ }
+ return(result);
+}
+
+GC_API GC_ATTR_MALLOC void * GC_CALL
+ GC_debug_generic_or_special_malloc(size_t lb, int knd, GC_EXTRA_PARAMS)
+{
+ switch (knd) {
+ case PTRFREE:
+ return GC_debug_malloc_atomic(lb, OPT_RA s, i);
+ case NORMAL:
+ return GC_debug_malloc(lb, OPT_RA s, i);
+ case UNCOLLECTABLE:
+ return GC_debug_malloc_uncollectable(lb, OPT_RA s, i);
+# ifdef GC_ATOMIC_UNCOLLECTABLE
+ case AUNCOLLECTABLE:
+ return GC_debug_malloc_atomic_uncollectable(lb, OPT_RA s, i);
+# endif
+ default:
+ return GC_debug_generic_malloc(lb, knd, OPT_RA s, i);
+ }
+}
+
+#ifndef SHORT_DBG_HDRS
+
+/* List of smashed (clobbered) locations. We defer printing these, */
+/* since we can't always print them nicely with the allocation lock */
+/* held. We put them here instead of in GC_arrays, since it may be */
+/* useful to be able to look at them with the debugger. */
+#ifndef MAX_SMASHED
+# define MAX_SMASHED 20
+#endif
+STATIC ptr_t GC_smashed[MAX_SMASHED] = {0};
+STATIC unsigned GC_n_smashed = 0;
+
+STATIC void GC_add_smashed(ptr_t smashed)
+{
+ GC_ASSERT(GC_is_marked(GC_base(smashed)));
+ /* FIXME: Prevent adding an object while printing smashed list. */
+ GC_smashed[GC_n_smashed] = smashed;
+ if (GC_n_smashed < MAX_SMASHED - 1) ++GC_n_smashed;
+ /* In case of overflow, we keep the first MAX_SMASHED-1 */
+ /* entries plus the last one. */
+ GC_SET_HAVE_ERRORS();
+}
+
+/* Print all objects on the list. Clear the list. */
+STATIC void GC_print_all_smashed_proc(void)
+{
+ unsigned i;
+
+ GC_ASSERT(I_DONT_HOLD_LOCK());
+ if (GC_n_smashed == 0) return;
+ GC_err_printf("GC_check_heap_block: found %u smashed heap objects:\n",
+ GC_n_smashed);
+ for (i = 0; i < GC_n_smashed; ++i) {
+ ptr_t base = (ptr_t)GC_base(GC_smashed[i]);
+
+# ifdef LINT2
+ if (!base) ABORT("Invalid GC_smashed element");
+# endif
+ GC_print_smashed_obj("", base + sizeof(oh), GC_smashed[i]);
+ GC_smashed[i] = 0;
+ }
+ GC_n_smashed = 0;
+}
+
+/* Check all marked objects in the given block for validity */
+/* Avoid GC_apply_to_each_object for performance reasons. */
+STATIC void GC_check_heap_block(struct hblk *hbp, word dummy GC_ATTR_UNUSED)
+{
+ struct hblkhdr * hhdr = HDR(hbp);
+ word sz = hhdr -> hb_sz;
+ word bit_no;
+ char *p, *plim;
+
+ p = hbp->hb_body;
+ if (sz > MAXOBJBYTES) {
+ plim = p;
+ } else {
+ plim = hbp->hb_body + HBLKSIZE - sz;
+ }
+ /* go through all objects in block */
+ for (bit_no = 0; (word)p <= (word)plim;
+ bit_no += MARK_BIT_OFFSET(sz), p += sz) {
+ if (mark_bit_from_hdr(hhdr, bit_no) && GC_HAS_DEBUG_INFO((ptr_t)p)) {
+ ptr_t clobbered = GC_check_annotated_obj((oh *)p);
+ if (clobbered != 0)
+ GC_add_smashed(clobbered);
+ }
+ }
+}
+
+/* This assumes that all accessible objects are marked, and that */
+/* I hold the allocation lock. Normally called by collector. */
+STATIC void GC_check_heap_proc(void)
+{
+ GC_STATIC_ASSERT((sizeof(oh) & (GRANULE_BYTES - 1)) == 0);
+ /* FIXME: Should we check for twice that alignment? */
+ GC_apply_to_all_blocks(GC_check_heap_block, 0);
+}
+
+GC_INNER GC_bool GC_check_leaked(ptr_t base)
+{
+ word i;
+ word obj_sz;
+ word *p;
+
+ if (
+# if defined(KEEP_BACK_PTRS) || defined(MAKE_BACK_GRAPH)
+ (*(word *)base & 1) != 0 &&
+# endif
+ GC_has_other_debug_info(base) >= 0)
+ return TRUE; /* object has leaked */
+
+ /* Validate freed object's content. */
+ p = (word *)(base + sizeof(oh));
+ obj_sz = BYTES_TO_WORDS(HDR(base)->hb_sz - sizeof(oh));
+ for (i = 0; i < obj_sz; ++i)
+ if (p[i] != GC_FREED_MEM_MARKER) {
+ GC_set_mark_bit(base); /* do not reclaim it in this cycle */
+ GC_add_smashed((ptr_t)(&p[i])); /* alter-after-free detected */
+ break; /* don't report any other smashed locations in the object */
+ }
+
+ return FALSE; /* GC_debug_free() has been called */
+}
+
+#endif /* !SHORT_DBG_HDRS */
+
+#ifndef GC_NO_FINALIZATION
+
+struct closure {
+ GC_finalization_proc cl_fn;
+ void * cl_data;
+};
+
+STATIC void * GC_make_closure(GC_finalization_proc fn, void * data)
+{
+ struct closure * result =
+# ifdef DBG_HDRS_ALL
+ (struct closure *) GC_debug_malloc(sizeof (struct closure),
+ GC_EXTRAS);
+# else
+ (struct closure *) GC_malloc(sizeof (struct closure));
+# endif
+ if (result != 0) {
+ result -> cl_fn = fn;
+ result -> cl_data = data;
+ }
+ return((void *)result);
+}
+
+/* An auxiliary fns to make finalization work correctly with displaced */
+/* pointers introduced by the debugging allocators. */
+STATIC void GC_CALLBACK GC_debug_invoke_finalizer(void * obj, void * data)
+{
+ struct closure * cl = (struct closure *) data;
+ (*(cl -> cl_fn))((void *)((char *)obj + sizeof(oh)), cl -> cl_data);
+}
+
+/* Special finalizer_proc value to detect GC_register_finalizer() failure. */
+#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,
+ struct closure *my_old_cd, GC_finalization_proc *ofn,
+ void **ocd)
+{
+ if (0 != my_old_fn) {
+ if (my_old_fn == OFN_UNSET) {
+ /* GC_register_finalizer() failed; (*ofn) and (*ocd) are unchanged. */
+ return;
+ }
+ if (my_old_fn != GC_debug_invoke_finalizer) {
+ GC_err_printf("Debuggable object at %p had a non-debug finalizer\n",
+ obj);
+ /* This should probably be fatal. */
+ } else {
+ if (ofn) *ofn = my_old_cd -> cl_fn;
+ if (ocd) *ocd = my_old_cd -> cl_data;
+ }
+ } else {
+ if (ofn) *ofn = 0;
+ if (ocd) *ocd = 0;
+ }
+}
+
+GC_API void GC_CALL GC_debug_register_finalizer(void * obj,
+ GC_finalization_proc fn,
+ void * cd, GC_finalization_proc *ofn,
+ void * *ocd)
+{
+ GC_finalization_proc my_old_fn = OFN_UNSET;
+ void * my_old_cd = NULL; /* to avoid "might be uninitialized" warning */
+ 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;
+ return;
+ }
+ if ((ptr_t)obj - base != sizeof(oh)) {
+ GC_err_printf("GC_debug_register_finalizer called with"
+ " non-base-pointer %p\n", obj);
+ }
+ if (0 == fn) {
+ GC_register_finalizer(base, 0, 0, &my_old_fn, &my_old_cd);
+ } else {
+ cd = GC_make_closure(fn, cd);
+ if (cd == 0) return; /* out of memory; *ofn and *ocd are unchanged */
+ GC_register_finalizer(base, GC_debug_invoke_finalizer,
+ cd, &my_old_fn, &my_old_cd);
+ }
+ store_old(obj, my_old_fn, (struct closure *)my_old_cd, ofn, ocd);
+}
+
+GC_API void GC_CALL GC_debug_register_finalizer_no_order
+ (void * obj, GC_finalization_proc fn,
+ void * cd, GC_finalization_proc *ofn,
+ void * *ocd)
+{
+ GC_finalization_proc my_old_fn = OFN_UNSET;
+ void * my_old_cd = NULL;
+ 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;
+ return;
+ }
+ if ((ptr_t)obj - base != sizeof(oh)) {
+ GC_err_printf("GC_debug_register_finalizer_no_order called with"
+ " non-base-pointer %p\n", obj);
+ }
+ if (0 == fn) {
+ GC_register_finalizer_no_order(base, 0, 0, &my_old_fn, &my_old_cd);
+ } else {
+ cd = GC_make_closure(fn, cd);
+ if (cd == 0) return; /* out of memory */
+ GC_register_finalizer_no_order(base, GC_debug_invoke_finalizer,
+ cd, &my_old_fn, &my_old_cd);
+ }
+ store_old(obj, my_old_fn, (struct closure *)my_old_cd, ofn, ocd);
+}
+
+GC_API void GC_CALL GC_debug_register_finalizer_unreachable
+ (void * obj, GC_finalization_proc fn,
+ void * cd, GC_finalization_proc *ofn,
+ void * *ocd)
+{
+ GC_finalization_proc my_old_fn = OFN_UNSET;
+ void * my_old_cd = NULL;
+ 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;
+ return;
+ }
+ if ((ptr_t)obj - base != sizeof(oh)) {
+ GC_err_printf("GC_debug_register_finalizer_unreachable called with"
+ " non-base-pointer %p\n", obj);
+ }
+ if (0 == fn) {
+ GC_register_finalizer_unreachable(base, 0, 0, &my_old_fn, &my_old_cd);
+ } else {
+ cd = GC_make_closure(fn, cd);
+ if (cd == 0) return; /* out of memory */
+ GC_register_finalizer_unreachable(base, GC_debug_invoke_finalizer,
+ cd, &my_old_fn, &my_old_cd);
+ }
+ store_old(obj, my_old_fn, (struct closure *)my_old_cd, ofn, ocd);
+}
+
+GC_API void GC_CALL GC_debug_register_finalizer_ignore_self
+ (void * obj, GC_finalization_proc fn,
+ void * cd, GC_finalization_proc *ofn,
+ void * *ocd)
+{
+ GC_finalization_proc my_old_fn = OFN_UNSET;
+ void * my_old_cd = NULL;
+ 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;
+ return;
+ }
+ if ((ptr_t)obj - base != sizeof(oh)) {
+ GC_err_printf("GC_debug_register_finalizer_ignore_self called with"
+ " non-base-pointer %p\n", obj);
+ }
+ if (0 == fn) {
+ GC_register_finalizer_ignore_self(base, 0, 0, &my_old_fn, &my_old_cd);
+ } else {
+ cd = GC_make_closure(fn, cd);
+ if (cd == 0) return; /* out of memory */
+ GC_register_finalizer_ignore_self(base, GC_debug_invoke_finalizer,
+ cd, &my_old_fn, &my_old_cd);
+ }
+ store_old(obj, my_old_fn, (struct closure *)my_old_cd, ofn, ocd);
+}
+
+#endif /* !GC_NO_FINALIZATION */
+
+GC_API GC_ATTR_MALLOC void * GC_CALL GC_debug_malloc_replacement(size_t lb)
+{
+ return GC_debug_malloc(lb, GC_DBG_EXTRAS);
+}
+
+GC_API void * GC_CALL GC_debug_realloc_replacement(void *p, size_t lb)
+{
+ return GC_debug_realloc(p, lb, GC_DBG_EXTRAS);
+}