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[Emacs-diffs] Changes to emacs/gc/dbg_mlc.c [Boehm-versions]
|
From: |
Dave Love |
|
Subject: |
[Emacs-diffs] Changes to emacs/gc/dbg_mlc.c [Boehm-versions] |
|
Date: |
Mon, 16 Jun 2003 11:19:55 -0400 |
Index: emacs/gc/dbg_mlc.c
diff -c /dev/null emacs/gc/dbg_mlc.c:1.2.2.1.2.1
*** /dev/null Mon Jun 16 11:19:55 2003
--- emacs/gc/dbg_mlc.c Mon Jun 16 11:19:52 2003
***************
*** 0 ****
--- 1,1113 ----
+ /*
+ * 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.
+ *
+ * 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"
+
+ 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));
+
+
+ #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, 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;
+ register ptr_t body = (ptr_t)(ohdr + 1);
+ register word sz = GC_size((ptr_t) ohdr);
+
+ if (HBLKPTR((ptr_t)ohdr) != HBLKPTR((ptr_t)body)
+ || sz < DEBUG_BYTES + EXTRA_BYTES) {
+ return(FALSE);
+ }
+ if (ohdr -> oh_sz == sz) {
+ /* Object may have had debug info, but has been deallocated */
+ return(FALSE);
+ }
+ if (ohdr -> oh_sf == (START_FLAG ^ (word)body)) return(TRUE);
+ if (((word *)ohdr)[BYTES_TO_WORDS(sz)-1] == (END_FLAG ^ (word)body)) {
+ return(TRUE);
+ }
+ return(FALSE);
+ }
+ #endif
+
+ #ifdef KEEP_BACK_PTRS
+
+ # include <stdlib.h>
+
+ # if defined(LINUX) || defined(SUNOS4) || defined(SUNOS5) \
+ || defined(HPUX) || defined(IRIX5) || 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 */
+ /* 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.
*/
+ 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);
+ }
+ }
+
+ 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 */
+ /* Returns 1 on success, 0 if source couldn't be determined. */
+ /* Dest can be any address within a heap object. */
+ GC_ref_kind 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;
+ 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 (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);
+ *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. */
+ void *GC_generate_random_heap_address(void)
+ {
+ int i;
+ 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) {
+ return GC_heap_sects[i].hs_start + heap_offset;
+ } else {
+ heap_offset -= size;
+ }
+ }
+ ABORT("GC_generate_random_heap_address: size inconsistency");
+ /*NOTREACHED*/
+ return 0;
+ }
+
+ /* Generate a random address inside a valid marked heap object. */
+ void *GC_generate_random_valid_address(void)
+ {
+ ptr_t result;
+ ptr_t base;
+ for (;;) {
+ result = GC_generate_random_heap_address();
+ base = GC_base(result);
+ if (0 == base) continue;
+ if (!GC_is_marked(base)) continue;
+ return result;
+ }
+ }
+
+ /* Print back trace for p */
+ void GC_print_backtrace(void *p)
+ {
+ void *current = p;
+ int i;
+ GC_ref_kind source;
+ size_t offset;
+ void *base;
+
+ GC_print_heap_obj(GC_base(current));
+ GC_err_printf0("\n");
+ for (i = 0; ; ++i) {
+ source = GC_get_back_ptr_info(current, &base, &offset);
+ if (GC_UNREFERENCED == source) {
+ GC_err_printf0("Reference could not be found\n");
+ goto out;
+ }
+ if (GC_NO_SPACE == source) {
+ GC_err_printf0("No debug info in object: Can't find reference\n");
+ goto out;
+ }
+ GC_err_printf1("Reachable via %d levels of pointers from ",
+ (unsigned long)i);
+ switch(source) {
+ 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;
+ case GC_REFD_FROM_HEAP:
+ GC_err_printf1("offset %ld in object:\n", (unsigned long)offset);
+ /* Take GC_base(base) to get real base, i.e. header. */
+ GC_print_heap_obj(GC_base(base));
+ GC_err_printf0("\n");
+ break;
+ }
+ current = base;
+ }
+ 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 */
+
+ # define CROSSES_HBLK(p, sz) \
+ (((word)(p + sizeof(oh) + sz - 1) ^ (word)p) >= HBLKSIZE)
+ /* Store debugging info into p. Return displaced pointer. */
+ /* Assumes we don't hold allocation lock. */
+ ptr_t GC_store_debug_info(p, sz, string, integer)
+ register ptr_t p; /* base pointer */
+ word sz; /* bytes */
+ GC_CONST char * string;
+ word integer;
+ {
+ register word * result = (word *)((oh *)p + 1);
+ DCL_LOCK_STATE;
+
+ /* There is some argument that we should dissble signals here. */
+ /* But that's expensive. And this way things should only appear */
+ /* inconsistent while we're in the handler.
*/
+ LOCK();
+ GC_ASSERT(GC_size(p) >= sizeof(oh) + sz);
+ GC_ASSERT(!(SMALL_OBJ(sz) && CROSSES_HBLK(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 = 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
+ 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.
*/
+ GC_ASSERT(GC_size(p) >= sizeof(oh) + sz);
+ GC_ASSERT(!(SMALL_OBJ(sz) && CROSSES_HBLK(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 = 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. */
+ ptr_t GC_check_annotated_obj(ohdr)
+ register oh * ohdr;
+ {
+ register ptr_t body = (ptr_t)(ohdr + 1);
+ register 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 */
+
+ void GC_print_obj(p)
+ ptr_t p;
+ {
+ register oh * ohdr = (oh *)GC_base(p);
+
+ GC_ASSERT(!I_HOLD_LOCK());
+ GC_err_printf1("0x%lx (", ((unsigned long)ohdr + sizeof(oh)));
+ GC_err_puts(ohdr -> oh_string);
+ # ifdef SHORT_DBG_HDRS
+ GC_err_printf1(":%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);
+ }
+
+ # 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
+ {
+ GC_ASSERT(!I_HOLD_LOCK());
+ 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;
+ {
+ register oh * ohdr = (oh *)GC_base(p);
+
+ GC_ASSERT(!I_HOLD_LOCK());
+ GC_err_printf2("0x%lx in object at 0x%lx(", (unsigned long)clobbered_addr,
+ (unsigned long)p);
+ if (clobbered_addr <= (ptr_t)(&(ohdr -> oh_sz))
+ || ohdr -> oh_string == 0) {
+ GC_err_printf1("<smashed>, appr. sz = %ld)\n",
+ (GC_size((ptr_t)ohdr) - DEBUG_BYTES));
+ } else {
+ if (ohdr -> oh_string[0] == '\0') {
+ GC_err_puts("EMPTY(smashed?)");
+ } else {
+ GC_err_puts(ohdr -> oh_string);
+ }
+ GC_err_printf2(":%ld, sz=%ld)\n", (unsigned long)(ohdr -> oh_int),
+ (unsigned long)(ohdr -> oh_sz));
+ PRINT_CALL_CHAIN(ohdr);
+ }
+ }
+ #endif
+
+ void GC_check_heap_proc GC_PROTO((void));
+
+ void GC_print_all_smashed_proc GC_PROTO((void));
+
+ void GC_do_nothing() {}
+
+ void GC_start_debugging()
+ {
+ # 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((word)sizeof(oh));
+ }
+
+ # if defined(__STDC__) || defined(__cplusplus)
+ void GC_debug_register_displacement(GC_word offset)
+ # else
+ void GC_debug_register_displacement(offset)
+ GC_word offset;
+ # endif
+ {
+ GC_register_displacement(offset);
+ GC_register_displacement((word)sizeof(oh) + offset);
+ }
+
+ # ifdef __STDC__
+ GC_PTR GC_debug_malloc(size_t lb, GC_EXTRA_PARAMS)
+ # else
+ GC_PTR GC_debug_malloc(lb, s, i)
+ size_t lb;
+ char * s;
+ int i;
+ # ifdef GC_ADD_CALLER
+ --> GC_ADD_CALLER not implemented for K&R C
+ # endif
+ # endif
+ {
+ GC_PTR result = GC_malloc(lb + DEBUG_BYTES);
+
+ if (result == 0) {
+ GC_err_printf1("GC_debug_malloc(%ld) returning NIL (",
+ (unsigned long) lb);
+ GC_err_puts(s);
+ GC_err_printf1(":%ld)\n", (unsigned long)i);
+ return(0);
+ }
+ if (!GC_debugging_started) {
+ GC_start_debugging();
+ }
+ ADD_CALL_CHAIN(result, ra);
+ return (GC_store_debug_info(result, (word)lb, s, (word)i));
+ }
+
+ # ifdef __STDC__
+ GC_PTR GC_debug_malloc_ignore_off_page(size_t lb, GC_EXTRA_PARAMS)
+ # else
+ GC_PTR GC_debug_malloc_ignore_off_page(lb, s, i)
+ size_t lb;
+ char * s;
+ int i;
+ # ifdef GC_ADD_CALLER
+ --> GC_ADD_CALLER not implemented for K&R C
+ # endif
+ # endif
+ {
+ GC_PTR result = GC_malloc_ignore_off_page(lb + DEBUG_BYTES);
+
+ if (result == 0) {
+ GC_err_printf1("GC_debug_malloc_ignore_off_page(%ld) returning NIL (",
+ (unsigned long) lb);
+ GC_err_puts(s);
+ GC_err_printf1(":%ld)\n", (unsigned long)i);
+ return(0);
+ }
+ if (!GC_debugging_started) {
+ GC_start_debugging();
+ }
+ ADD_CALL_CHAIN(result, ra);
+ return (GC_store_debug_info(result, (word)lb, s, (word)i));
+ }
+
+ # ifdef __STDC__
+ GC_PTR GC_debug_malloc_atomic_ignore_off_page(size_t lb, GC_EXTRA_PARAMS)
+ # else
+ GC_PTR GC_debug_malloc_atomic_ignore_off_page(lb, s, i)
+ size_t lb;
+ char * s;
+ int i;
+ # ifdef GC_ADD_CALLER
+ --> GC_ADD_CALLER not implemented for K&R C
+ # endif
+ # endif
+ {
+ GC_PTR result = GC_malloc_atomic_ignore_off_page(lb + DEBUG_BYTES);
+
+ if (result == 0) {
+ GC_err_printf1("GC_debug_malloc_atomic_ignore_off_page(%ld)"
+ " returning NIL (", (unsigned long) lb);
+ GC_err_puts(s);
+ GC_err_printf1(":%ld)\n", (unsigned long)i);
+ return(0);
+ }
+ if (!GC_debugging_started) {
+ GC_start_debugging();
+ }
+ ADD_CALL_CHAIN(result, ra);
+ 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, GC_RETURN_ADDR);
+ 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, GC_RETURN_ADDR);
+ 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, GC_EXTRA_PARAMS)
+ # else
+ GC_PTR GC_debug_malloc_stubborn(lb, s, i)
+ size_t lb;
+ char * s;
+ int i;
+ # endif
+ {
+ GC_PTR result = GC_malloc_stubborn(lb + DEBUG_BYTES);
+
+ if (result == 0) {
+ GC_err_printf1("GC_debug_malloc(%ld) returning NIL (",
+ (unsigned long) lb);
+ GC_err_puts(s);
+ GC_err_printf1(":%ld)\n", (unsigned long)i);
+ return(0);
+ }
+ if (!GC_debugging_started) {
+ GC_start_debugging();
+ }
+ ADD_CALL_CHAIN(result, ra);
+ return (GC_store_debug_info(result, (word)lb, s, (word)i));
+ }
+
+ void GC_debug_change_stubborn(p)
+ GC_PTR p;
+ {
+ register GC_PTR q = GC_base(p);
+ register hdr * hhdr;
+
+ if (q == 0) {
+ GC_err_printf1("Bad argument: 0x%lx to GC_debug_change_stubborn\n",
+ (unsigned long) p);
+ ABORT("GC_debug_change_stubborn: bad arg");
+ }
+ hhdr = HDR(q);
+ if (hhdr -> hb_obj_kind != STUBBORN) {
+ GC_err_printf1("GC_debug_change_stubborn arg not stubborn: 0x%lx\n",
+ (unsigned long) p);
+ ABORT("GC_debug_change_stubborn: arg not stubborn");
+ }
+ GC_change_stubborn(q);
+ }
+
+ void GC_debug_end_stubborn_change(p)
+ GC_PTR p;
+ {
+ register GC_PTR q = GC_base(p);
+ register hdr * hhdr;
+
+ if (q == 0) {
+ GC_err_printf1("Bad argument: 0x%lx to
GC_debug_end_stubborn_change\n",
+ (unsigned long) p);
+ ABORT("GC_debug_end_stubborn_change: bad arg");
+ }
+ hhdr = HDR(q);
+ if (hhdr -> hb_obj_kind != STUBBORN) {
+ GC_err_printf1("debug_end_stubborn_change arg not stubborn: 0x%lx\n",
+ (unsigned long) p);
+ ABORT("GC_debug_end_stubborn_change: arg not stubborn");
+ }
+ GC_end_stubborn_change(q);
+ }
+
+ #else /* !STUBBORN_ALLOC */
+
+ # ifdef __STDC__
+ 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;
+ char * s;
+ int i;
+ # endif
+ {
+ GC_PTR result = GC_malloc_atomic(lb + DEBUG_BYTES);
+
+ if (result == 0) {
+ GC_err_printf1("GC_debug_malloc_atomic(%ld) returning NIL (",
+ (unsigned long) lb);
+ GC_err_puts(s);
+ GC_err_printf1(":%ld)\n", (unsigned long)i);
+ return(0);
+ }
+ if (!GC_debugging_started) {
+ GC_start_debugging();
+ }
+ ADD_CALL_CHAIN(result, ra);
+ return (GC_store_debug_info(result, (word)lb, s, (word)i));
+ }
+
+ # ifdef __STDC__
+ 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;
+ char * s;
+ int i;
+ # endif
+ {
+ GC_PTR result = GC_malloc_uncollectable(lb + UNCOLLECTABLE_DEBUG_BYTES);
+
+ if (result == 0) {
+ GC_err_printf1("GC_debug_malloc_uncollectable(%ld) returning NIL (",
+ (unsigned long) lb);
+ GC_err_puts(s);
+ GC_err_printf1(":%ld)\n", (unsigned long)i);
+ return(0);
+ }
+ if (!GC_debugging_started) {
+ GC_start_debugging();
+ }
+ ADD_CALL_CHAIN(result, ra);
+ return (GC_store_debug_info(result, (word)lb, s, (word)i));
+ }
+
+ #ifdef ATOMIC_UNCOLLECTABLE
+ # ifdef __STDC__
+ 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;
+ char * s;
+ int i;
+ # endif
+ {
+ GC_PTR result =
+ GC_malloc_atomic_uncollectable(lb + UNCOLLECTABLE_DEBUG_BYTES);
+
+ if (result == 0) {
+ GC_err_printf1(
+ "GC_debug_malloc_atomic_uncollectable(%ld) returning NIL (",
+ (unsigned long) lb);
+ GC_err_puts(s);
+ GC_err_printf1(":%ld)\n", (unsigned long)i);
+ return(0);
+ }
+ if (!GC_debugging_started) {
+ GC_start_debugging();
+ }
+ ADD_CALL_CHAIN(result, ra);
+ return (GC_store_debug_info(result, (word)lb, s, (word)i));
+ }
+ #endif /* ATOMIC_UNCOLLECTABLE */
+
+ # ifdef __STDC__
+ void GC_debug_free(GC_PTR p)
+ # else
+ void GC_debug_free(p)
+ GC_PTR p;
+ # endif
+ {
+ 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);
+ 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 {
+ # 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 {
+ GC_err_printf0("GC_debug_free: found smashed location at ");
+ }
+ GC_print_smashed_obj(p, clobbered);
+ }
+ /* Invalidate size */
+ ((oh *)base) -> oh_sz = GC_size(base);
+ # endif /* SHORT_DBG_HDRS */
+ }
+ if (GC_find_leak) {
+ GC_free(base);
+ } else {
+ register hdr * hhdr = HDR(p);
+ GC_bool uncollectable = FALSE;
+
+ if (hhdr -> hb_obj_kind == UNCOLLECTABLE) {
+ uncollectable = TRUE;
+ }
+ # ifdef ATOMIC_UNCOLLECTABLE
+ if (hhdr -> hb_obj_kind == AUNCOLLECTABLE) {
+ uncollectable = TRUE;
+ }
+ # endif
+ if (uncollectable) GC_free(base);
+ } /* !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, GC_EXTRA_PARAMS)
+ # else
+ GC_PTR GC_debug_realloc(p, lb, s, i)
+ GC_PTR p;
+ size_t lb;
+ char *s;
+ int i;
+ # endif
+ {
+ register GC_PTR base = GC_base(p);
+ register ptr_t clobbered;
+ register GC_PTR result;
+ register size_t copy_sz = lb;
+ register size_t old_sz;
+ register hdr * hhdr;
+
+ if (p == 0) return(GC_debug_malloc(lb, OPT_RA s, i));
+ if (base == 0) {
+ GC_err_printf1(
+ "Attempt to reallocate invalid pointer %lx\n", (unsigned
long)p);
+ ABORT("realloc(invalid pointer)");
+ }
+ if ((ptr_t)p - (ptr_t)base != sizeof(oh)) {
+ GC_err_printf1(
+ "GC_debug_realloc called on pointer %lx wo debugging info\n",
+ (unsigned long)p);
+ return(GC_realloc(p, lb));
+ }
+ hhdr = HDR(base);
+ switch (hhdr -> hb_obj_kind) {
+ # ifdef STUBBORN_ALLOC
+ case STUBBORN:
+ result = GC_debug_malloc_stubborn(lb, OPT_RA s, i);
+ break;
+ # endif
+ 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 ATOMIC_UNCOLLECTABLE
+ case AUNCOLLECTABLE:
+ result = GC_debug_malloc_atomic_uncollectable(lb, OPT_RA s, i);
+ break;
+ # endif
+ default:
+ GC_err_printf0("GC_debug_realloc: encountered bad kind\n");
+ ABORT("bad kind");
+ }
+ # 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;
+ # endif
+ if (old_sz < copy_sz) copy_sz = old_sz;
+ if (result == 0) return(0);
+ BCOPY(p, result, copy_sz);
+ GC_debug_free(p);
+ return(result);
+ }
+
+ #ifndef SHORT_DBG_HDRS
+
+ /* List of smashed objects. 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. */
+ #define MAX_SMASHED 20
+ ptr_t GC_smashed[MAX_SMASHED];
+ unsigned GC_n_smashed = 0;
+
+ # if defined(__STDC__) || defined(__cplusplus)
+ void GC_add_smashed(ptr_t smashed)
+ # else
+ void GC_add_smashed(smashed)
+ ptr_t smashed;
+ #endif
+ {
+ GC_ASSERT(GC_is_marked(GC_base(smashed)));
+ 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_have_errors = TRUE;
+ }
+
+ /* Print all objects on the list. Clear the list. */
+ void GC_print_all_smashed_proc ()
+ {
+ unsigned i;
+
+ GC_ASSERT(!I_HOLD_LOCK());
+ if (GC_n_smashed == 0) return;
+ GC_err_printf0("GC_check_heap_block: found smashed heap objects:\n");
+ for (i = 0; i < GC_n_smashed; ++i) {
+ GC_print_smashed_obj(GC_base(GC_smashed[i]), GC_smashed[i]);
+ GC_smashed[i] = 0;
+ }
+ GC_n_smashed = 0;
+ }
+
+ /* Check all marked objects in the given block for validity */
+ /*ARGSUSED*/
+ # 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;
+ register int word_no;
+ register word *p, *plim;
+
+ p = (word *)(hbp->hb_body);
+ word_no = 0;
+ if (sz > MAXOBJSZ) {
+ plim = p;
+ } else {
+ plim = (word *)((((word)hbp) + HBLKSIZE) - WORDS_TO_BYTES(sz));
+ }
+ /* go through all words in block */
+ while( p <= plim ) {
+ if( mark_bit_from_hdr(hhdr, word_no)
+ && GC_HAS_DEBUG_INFO((ptr_t)p)) {
+ ptr_t clobbered = GC_check_annotated_obj((oh *)p);
+
+ if (clobbered != 0) GC_add_smashed(clobbered);
+ }
+ word_no += sz;
+ p += sz;
+ }
+ }
+
+
+ /* This assumes that all accessible objects are marked, and that */
+ /* I hold the allocation lock. Normally called by collector.
*/
+ void GC_check_heap_proc()
+ {
+ # ifndef SMALL_CONFIG
+ # ifdef ALIGN_DOUBLE
+ GC_STATIC_ASSERT((sizeof(oh) & (2 * sizeof(word) - 1)) == 0);
+ # else
+ GC_STATIC_ASSERT((sizeof(oh) & (sizeof(word) - 1)) == 0);
+ # endif
+ # endif
+ 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;
+ };
+
+ # ifdef __STDC__
+ void * GC_make_closure(GC_finalization_proc fn, void * data)
+ # else
+ GC_PTR GC_make_closure(fn, data)
+ GC_finalization_proc fn;
+ GC_PTR data;
+ # endif
+ {
+ 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
+
+ result -> cl_fn = fn;
+ result -> cl_data = data;
+ return((GC_PTR)result);
+ }
+
+ # ifdef __STDC__
+ void GC_debug_invoke_finalizer(void * obj, void * data)
+ # else
+ void GC_debug_invoke_finalizer(obj, data)
+ char * obj;
+ char * data;
+ # endif
+ {
+ register struct closure * cl = (struct closure *) data;
+
+ (*(cl -> cl_fn))((GC_PTR)((char *)obj + sizeof(oh)), cl -> cl_data);
+ }
+
+ /* Set ofn and ocd to reflect the values we got back. */
+ static void store_old (obj, my_old_fn, my_old_cd, ofn, ocd)
+ GC_PTR obj;
+ GC_finalization_proc my_old_fn;
+ struct closure * my_old_cd;
+ GC_finalization_proc *ofn;
+ GC_PTR *ocd;
+ {
+ if (0 != my_old_fn) {
+ if (my_old_fn != GC_debug_invoke_finalizer) {
+ GC_err_printf1("Debuggable object at 0x%lx had 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;
+ }
+ }
+
+ # ifdef __STDC__
+ void GC_debug_register_finalizer(GC_PTR obj, GC_finalization_proc fn,
+ GC_PTR cd, GC_finalization_proc *ofn,
+ GC_PTR *ocd)
+ # else
+ void GC_debug_register_finalizer(obj, fn, cd, ofn, ocd)
+ GC_PTR obj;
+ GC_finalization_proc fn;
+ GC_PTR cd;
+ GC_finalization_proc *ofn;
+ GC_PTR *ocd;
+ # endif
+ {
+ GC_finalization_proc my_old_fn;
+ GC_PTR my_old_cd;
+ ptr_t base = GC_base(obj);
+ if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
+ GC_err_printf1(
+ "GC_debug_register_finalizer called with non-base-pointer 0x%lx\n",
+ obj);
+ }
+ if (0 == fn) {
+ GC_register_finalizer(base, 0, 0, &my_old_fn, &my_old_cd);
+ } else {
+ GC_register_finalizer(base, GC_debug_invoke_finalizer,
+ GC_make_closure(fn,cd), &my_old_fn, &my_old_cd);
+ }
+ store_old(obj, my_old_fn, (struct closure *)my_old_cd, ofn, ocd);
+ }
+
+ # ifdef __STDC__
+ void GC_debug_register_finalizer_no_order
+ (GC_PTR obj, GC_finalization_proc fn,
+ GC_PTR cd, GC_finalization_proc *ofn,
+ GC_PTR *ocd)
+ # else
+ void GC_debug_register_finalizer_no_order
+ (obj, fn, cd, ofn, ocd)
+ GC_PTR obj;
+ GC_finalization_proc fn;
+ GC_PTR cd;
+ GC_finalization_proc *ofn;
+ GC_PTR *ocd;
+ # endif
+ {
+ GC_finalization_proc my_old_fn;
+ GC_PTR my_old_cd;
+ ptr_t base = GC_base(obj);
+ if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
+ GC_err_printf1(
+ "GC_debug_register_finalizer_no_order called with non-base-pointer
0x%lx\n",
+ obj);
+ }
+ if (0 == fn) {
+ GC_register_finalizer_no_order(base, 0, 0, &my_old_fn, &my_old_cd);
+ } else {
+ GC_register_finalizer_no_order(base, GC_debug_invoke_finalizer,
+ GC_make_closure(fn,cd), &my_old_fn,
+ &my_old_cd);
+ }
+ store_old(obj, my_old_fn, (struct closure *)my_old_cd, ofn, ocd);
+ }
+
+ # ifdef __STDC__
+ void GC_debug_register_finalizer_ignore_self
+ (GC_PTR obj, GC_finalization_proc fn,
+ GC_PTR cd, GC_finalization_proc *ofn,
+ GC_PTR *ocd)
+ # else
+ void GC_debug_register_finalizer_ignore_self
+ (obj, fn, cd, ofn, ocd)
+ GC_PTR obj;
+ GC_finalization_proc fn;
+ GC_PTR cd;
+ GC_finalization_proc *ofn;
+ GC_PTR *ocd;
+ # endif
+ {
+ GC_finalization_proc my_old_fn;
+ GC_PTR my_old_cd;
+ ptr_t base = GC_base(obj);
+ if (0 == base || (ptr_t)obj - base != sizeof(oh)) {
+ GC_err_printf1(
+ "GC_debug_register_finalizer_ignore_self called with
non-base-pointer 0x%lx\n",
+ obj);
+ }
+ if (0 == fn) {
+ GC_register_finalizer_ignore_self(base, 0, 0, &my_old_fn, &my_old_cd);
+ } else {
+ GC_register_finalizer_ignore_self(base, GC_debug_invoke_finalizer,
+ GC_make_closure(fn,cd), &my_old_fn,
+ &my_old_cd);
+ }
+ store_old(obj, my_old_fn, (struct closure *)my_old_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);
+ }
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