mirror of
https://github.com/autc04/Retro68.git
synced 2024-09-08 20:55:01 +00:00
1221 lines
34 KiB
C
1221 lines
34 KiB
C
/*
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* Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
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* Copyright (c) 1991-1995 by Xerox Corporation. All rights reserved.
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* Copyright (c) 1997 by Silicon Graphics. All rights reserved.
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* Copyright (c) 1999-2004 Hewlett-Packard Development Company, L.P.
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* Copyright (C) 2007 Free Software Foundation, Inc
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*
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* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
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* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
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*
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* Permission is hereby granted to use or copy this program
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* for any purpose, provided the above notices are retained on all copies.
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* Permission to modify the code and to distribute modified code is granted,
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* provided the above notices are retained, and a notice that the code was
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* modified is included with the above copyright notice.
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*/
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#include "private/dbg_mlc.h"
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void GC_default_print_heap_obj_proc();
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GC_API void GC_register_finalizer_no_order
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GC_PROTO((GC_PTR obj, GC_finalization_proc fn, GC_PTR cd,
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GC_finalization_proc *ofn, GC_PTR *ocd));
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#ifndef SHORT_DBG_HDRS
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/* Check whether object with base pointer p has debugging info */
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/* p is assumed to point to a legitimate object in our part */
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/* of the heap. */
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/* This excludes the check as to whether the back pointer is */
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/* odd, which is added by the GC_HAS_DEBUG_INFO macro. */
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/* Note that if DBG_HDRS_ALL is set, uncollectable objects */
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/* on free lists may not have debug information set. Thus it's */
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/* not always safe to return TRUE, even if the client does */
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/* its part. */
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GC_bool GC_has_other_debug_info(p)
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ptr_t p;
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{
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register oh * ohdr = (oh *)p;
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register ptr_t body = (ptr_t)(ohdr + 1);
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register word sz = GC_size((ptr_t) ohdr);
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if (HBLKPTR((ptr_t)ohdr) != HBLKPTR((ptr_t)body)
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|| sz < DEBUG_BYTES + EXTRA_BYTES) {
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return(FALSE);
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}
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if (ohdr -> oh_sz == sz) {
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/* Object may have had debug info, but has been deallocated */
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return(FALSE);
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}
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if (ohdr -> oh_sf == (START_FLAG ^ (word)body)) return(TRUE);
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if (((word *)ohdr)[BYTES_TO_WORDS(sz)-1] == (END_FLAG ^ (word)body)) {
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return(TRUE);
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}
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return(FALSE);
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}
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#endif
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#ifdef KEEP_BACK_PTRS
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# include <stdlib.h>
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# if defined(LINUX) || defined(SUNOS4) || defined(SUNOS5) \
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|| defined(HPUX) || defined(IRIX5) || defined(OSF1)
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# define RANDOM() random()
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# else
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# define RANDOM() (long)rand()
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# endif
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/* Store back pointer to source in dest, if that appears to be possible. */
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/* This is not completely safe, since we may mistakenly conclude that */
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/* dest has a debugging wrapper. But the error probability is very */
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/* small, and this shouldn't be used in production code. */
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/* We assume that dest is the real base pointer. Source will usually */
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/* be a pointer to the interior of an object. */
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void GC_store_back_pointer(ptr_t source, ptr_t dest)
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{
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if (GC_HAS_DEBUG_INFO(dest)) {
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((oh *)dest) -> oh_back_ptr = HIDE_BACK_PTR(source);
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}
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}
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void GC_marked_for_finalization(ptr_t dest) {
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GC_store_back_pointer(MARKED_FOR_FINALIZATION, dest);
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}
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/* Store information about the object referencing dest in *base_p */
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/* and *offset_p. */
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/* source is root ==> *base_p = address, *offset_p = 0 */
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/* source is heap object ==> *base_p != 0, *offset_p = offset */
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/* Returns 1 on success, 0 if source couldn't be determined. */
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/* Dest can be any address within a heap object. */
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GC_ref_kind GC_get_back_ptr_info(void *dest, void **base_p, size_t *offset_p)
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{
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oh * hdr = (oh *)GC_base(dest);
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ptr_t bp;
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ptr_t bp_base;
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if (!GC_HAS_DEBUG_INFO((ptr_t) hdr)) return GC_NO_SPACE;
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bp = REVEAL_POINTER(hdr -> oh_back_ptr);
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if (MARKED_FOR_FINALIZATION == bp) return GC_FINALIZER_REFD;
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if (MARKED_FROM_REGISTER == bp) return GC_REFD_FROM_REG;
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if (NOT_MARKED == bp) return GC_UNREFERENCED;
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# if ALIGNMENT == 1
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/* Heuristically try to fix off by 1 errors we introduced by */
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/* insisting on even addresses. */
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{
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ptr_t alternate_ptr = bp + 1;
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ptr_t target = *(ptr_t *)bp;
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ptr_t alternate_target = *(ptr_t *)alternate_ptr;
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if (alternate_target >= GC_least_plausible_heap_addr
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&& alternate_target <= GC_greatest_plausible_heap_addr
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&& (target < GC_least_plausible_heap_addr
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|| target > GC_greatest_plausible_heap_addr)) {
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bp = alternate_ptr;
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}
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}
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# endif
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bp_base = GC_base(bp);
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if (0 == bp_base) {
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*base_p = bp;
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*offset_p = 0;
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return GC_REFD_FROM_ROOT;
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} else {
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if (GC_HAS_DEBUG_INFO(bp_base)) bp_base += sizeof(oh);
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*base_p = bp_base;
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*offset_p = bp - bp_base;
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return GC_REFD_FROM_HEAP;
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}
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}
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/* Generate a random heap address. */
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/* The resulting address is in the heap, but */
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/* not necessarily inside a valid object. */
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void *GC_generate_random_heap_address(void)
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{
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int i;
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long heap_offset = RANDOM();
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if (GC_heapsize > RAND_MAX) {
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heap_offset *= RAND_MAX;
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heap_offset += RANDOM();
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}
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heap_offset %= GC_heapsize;
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/* This doesn't yield a uniform distribution, especially if */
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/* e.g. RAND_MAX = 1.5* GC_heapsize. But for typical cases, */
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/* it's not too bad. */
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for (i = 0; i < GC_n_heap_sects; ++ i) {
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int size = GC_heap_sects[i].hs_bytes;
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if (heap_offset < size) {
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return GC_heap_sects[i].hs_start + heap_offset;
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} else {
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heap_offset -= size;
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}
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}
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ABORT("GC_generate_random_heap_address: size inconsistency");
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/*NOTREACHED*/
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return 0;
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}
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/* Generate a random address inside a valid marked heap object. */
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void *GC_generate_random_valid_address(void)
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{
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ptr_t result;
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ptr_t base;
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for (;;) {
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result = GC_generate_random_heap_address();
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base = GC_base(result);
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if (0 == base) continue;
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if (!GC_is_marked(base)) continue;
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return result;
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}
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}
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/* Print back trace for p */
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void GC_print_backtrace(void *p)
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{
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void *current = p;
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int i;
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GC_ref_kind source;
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size_t offset;
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void *base;
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GC_print_heap_obj(GC_base(current));
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GC_err_printf0("\n");
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for (i = 0; ; ++i) {
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source = GC_get_back_ptr_info(current, &base, &offset);
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if (GC_UNREFERENCED == source) {
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GC_err_printf0("Reference could not be found\n");
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goto out;
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}
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if (GC_NO_SPACE == source) {
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GC_err_printf0("No debug info in object: Can't find reference\n");
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goto out;
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}
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GC_err_printf1("Reachable via %d levels of pointers from ",
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(unsigned long)i);
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switch(source) {
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case GC_REFD_FROM_ROOT:
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GC_err_printf1("root at 0x%lx\n\n", (unsigned long)base);
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goto out;
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case GC_REFD_FROM_REG:
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GC_err_printf0("root in register\n\n");
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goto out;
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case GC_FINALIZER_REFD:
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GC_err_printf0("list of finalizable objects\n\n");
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goto out;
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case GC_REFD_FROM_HEAP:
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GC_err_printf1("offset %ld in object:\n", (unsigned long)offset);
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/* Take GC_base(base) to get real base, i.e. header. */
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GC_print_heap_obj(GC_base(base));
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GC_err_printf0("\n");
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break;
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}
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current = base;
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}
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out:;
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}
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/* Force a garbage collection and generate a backtrace from a */
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/* random heap address. */
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void GC_generate_random_backtrace_no_gc(void)
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{
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void * current;
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current = GC_generate_random_valid_address();
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GC_printf1("\n****Chose address 0x%lx in object\n", (unsigned long)current);
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GC_print_backtrace(current);
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}
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void GC_generate_random_backtrace(void)
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{
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GC_gcollect();
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GC_generate_random_backtrace_no_gc();
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}
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#endif /* KEEP_BACK_PTRS */
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# define CROSSES_HBLK(p, sz) \
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(((word)(p + sizeof(oh) + sz - 1) ^ (word)p) >= HBLKSIZE)
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/* Store debugging info into p. Return displaced pointer. */
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/* Assumes we don't hold allocation lock. */
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ptr_t GC_store_debug_info(p, sz, string, integer)
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register ptr_t p; /* base pointer */
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word sz; /* bytes */
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GC_CONST char * string;
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word integer;
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{
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register word * result = (word *)((oh *)p + 1);
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DCL_LOCK_STATE;
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/* There is some argument that we should dissble signals here. */
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/* But that's expensive. And this way things should only appear */
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/* inconsistent while we're in the handler. */
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LOCK();
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GC_ASSERT(GC_size(p) >= sizeof(oh) + sz);
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GC_ASSERT(!(SMALL_OBJ(sz) && CROSSES_HBLK(p, sz)));
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# ifdef KEEP_BACK_PTRS
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((oh *)p) -> oh_back_ptr = HIDE_BACK_PTR(NOT_MARKED);
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# endif
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# ifdef MAKE_BACK_GRAPH
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((oh *)p) -> oh_bg_ptr = HIDE_BACK_PTR((ptr_t)0);
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# endif
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((oh *)p) -> oh_string = string;
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((oh *)p) -> oh_int = integer;
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# ifndef SHORT_DBG_HDRS
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((oh *)p) -> oh_sz = sz;
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((oh *)p) -> oh_sf = START_FLAG ^ (word)result;
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((word *)p)[BYTES_TO_WORDS(GC_size(p))-1] =
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result[SIMPLE_ROUNDED_UP_WORDS(sz)] = END_FLAG ^ (word)result;
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# endif
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UNLOCK();
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return((ptr_t)result);
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}
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#ifdef DBG_HDRS_ALL
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/* Store debugging info into p. Return displaced pointer. */
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/* This version assumes we do hold the allocation lock. */
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ptr_t GC_store_debug_info_inner(p, sz, string, integer)
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register ptr_t p; /* base pointer */
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word sz; /* bytes */
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char * string;
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word integer;
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{
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register word * result = (word *)((oh *)p + 1);
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/* There is some argument that we should disable signals here. */
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/* But that's expensive. And this way things should only appear */
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/* inconsistent while we're in the handler. */
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GC_ASSERT(GC_size(p) >= sizeof(oh) + sz);
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GC_ASSERT(!(SMALL_OBJ(sz) && CROSSES_HBLK(p, sz)));
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# ifdef KEEP_BACK_PTRS
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((oh *)p) -> oh_back_ptr = HIDE_BACK_PTR(NOT_MARKED);
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# endif
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# ifdef MAKE_BACK_GRAPH
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((oh *)p) -> oh_bg_ptr = HIDE_BACK_PTR((ptr_t)0);
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# endif
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((oh *)p) -> oh_string = string;
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((oh *)p) -> oh_int = integer;
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# ifndef SHORT_DBG_HDRS
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((oh *)p) -> oh_sz = sz;
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((oh *)p) -> oh_sf = START_FLAG ^ (word)result;
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((word *)p)[BYTES_TO_WORDS(GC_size(p))-1] =
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result[SIMPLE_ROUNDED_UP_WORDS(sz)] = END_FLAG ^ (word)result;
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# endif
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return((ptr_t)result);
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}
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#endif
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#ifndef SHORT_DBG_HDRS
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/* Check the object with debugging info at ohdr */
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/* return NIL if it's OK. Else return clobbered */
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/* address. */
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ptr_t GC_check_annotated_obj(ohdr)
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register oh * ohdr;
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{
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register ptr_t body = (ptr_t)(ohdr + 1);
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register word gc_sz = GC_size((ptr_t)ohdr);
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if (ohdr -> oh_sz + DEBUG_BYTES > gc_sz) {
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return((ptr_t)(&(ohdr -> oh_sz)));
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}
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if (ohdr -> oh_sf != (START_FLAG ^ (word)body)) {
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return((ptr_t)(&(ohdr -> oh_sf)));
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}
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if (((word *)ohdr)[BYTES_TO_WORDS(gc_sz)-1] != (END_FLAG ^ (word)body)) {
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return((ptr_t)((word *)ohdr + BYTES_TO_WORDS(gc_sz)-1));
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}
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if (((word *)body)[SIMPLE_ROUNDED_UP_WORDS(ohdr -> oh_sz)]
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!= (END_FLAG ^ (word)body)) {
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return((ptr_t)((word *)body + SIMPLE_ROUNDED_UP_WORDS(ohdr -> oh_sz)));
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}
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return(0);
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}
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#endif /* !SHORT_DBG_HDRS */
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static GC_describe_type_fn GC_describe_type_fns[MAXOBJKINDS] = {0};
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void GC_register_describe_type_fn(kind, fn)
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int kind;
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GC_describe_type_fn fn;
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{
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GC_describe_type_fns[kind] = fn;
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}
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/* Print a type description for the object whose client-visible address */
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/* is p. */
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void GC_print_type(p)
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ptr_t p;
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{
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hdr * hhdr = GC_find_header(p);
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char buffer[GC_TYPE_DESCR_LEN + 1];
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int kind = hhdr -> hb_obj_kind;
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if (0 != GC_describe_type_fns[kind] && GC_is_marked(GC_base(p))) {
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/* This should preclude free list objects except with */
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/* thread-local allocation. */
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buffer[GC_TYPE_DESCR_LEN] = 0;
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(GC_describe_type_fns[kind])(p, buffer);
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GC_ASSERT(buffer[GC_TYPE_DESCR_LEN] == 0);
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GC_err_puts(buffer);
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} else {
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switch(kind) {
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case PTRFREE:
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GC_err_puts("PTRFREE");
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break;
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case NORMAL:
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GC_err_puts("NORMAL");
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break;
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case UNCOLLECTABLE:
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GC_err_puts("UNCOLLECTABLE");
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break;
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# ifdef ATOMIC_UNCOLLECTABLE
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case AUNCOLLECTABLE:
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GC_err_puts("ATOMIC UNCOLLECTABLE");
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break;
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# endif
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case STUBBORN:
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GC_err_puts("STUBBORN");
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break;
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default:
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GC_err_printf2("kind %ld, descr 0x%lx", kind, hhdr -> hb_descr);
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}
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}
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}
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|
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void GC_print_obj(p)
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ptr_t p;
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{
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register oh * ohdr = (oh *)GC_base(p);
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GC_ASSERT(!I_HOLD_LOCK());
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GC_err_printf1("0x%lx (", ((unsigned long)ohdr + sizeof(oh)));
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GC_err_puts(ohdr -> oh_string);
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# ifdef SHORT_DBG_HDRS
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GC_err_printf1(":%ld, ", (unsigned long)(ohdr -> oh_int));
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# else
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GC_err_printf2(":%ld, sz=%ld, ", (unsigned long)(ohdr -> oh_int),
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(unsigned long)(ohdr -> oh_sz));
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# endif
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GC_print_type((ptr_t)(ohdr + 1));
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GC_err_puts(")\n");
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PRINT_CALL_CHAIN(ohdr);
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}
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|
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# if defined(__STDC__) || defined(__cplusplus)
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void GC_debug_print_heap_obj_proc(ptr_t p)
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# else
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void GC_debug_print_heap_obj_proc(p)
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ptr_t p;
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# endif
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{
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GC_ASSERT(!I_HOLD_LOCK());
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if (GC_HAS_DEBUG_INFO(p)) {
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GC_print_obj(p);
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} else {
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GC_default_print_heap_obj_proc(p);
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}
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}
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|
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#ifndef SHORT_DBG_HDRS
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void GC_print_smashed_obj(p, clobbered_addr)
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ptr_t p, clobbered_addr;
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{
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register oh * ohdr = (oh *)GC_base(p);
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|
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GC_ASSERT(!I_HOLD_LOCK());
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GC_err_printf2("0x%lx in object at 0x%lx(", (unsigned long)clobbered_addr,
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(unsigned long)p);
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if (clobbered_addr <= (ptr_t)(&(ohdr -> oh_sz))
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|| ohdr -> oh_string == 0) {
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GC_err_printf1("<smashed>, appr. sz = %ld)\n",
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(GC_size((ptr_t)ohdr) - DEBUG_BYTES));
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} else {
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if (ohdr -> oh_string[0] == '\0') {
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GC_err_puts("EMPTY(smashed?)");
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} else {
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GC_err_puts(ohdr -> oh_string);
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}
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GC_err_printf2(":%ld, sz=%ld)\n", (unsigned long)(ohdr -> oh_int),
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(unsigned long)(ohdr -> oh_sz));
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PRINT_CALL_CHAIN(ohdr);
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}
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}
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#endif
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|
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void GC_check_heap_proc GC_PROTO((void));
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void GC_print_all_smashed_proc GC_PROTO((void));
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|
|
void GC_do_nothing() {}
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|
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void GC_start_debugging()
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|
{
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# ifndef SHORT_DBG_HDRS
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GC_check_heap = GC_check_heap_proc;
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GC_print_all_smashed = GC_print_all_smashed_proc;
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# else
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GC_check_heap = GC_do_nothing;
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GC_print_all_smashed = GC_do_nothing;
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# endif
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GC_print_heap_obj = GC_debug_print_heap_obj_proc;
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GC_debugging_started = TRUE;
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GC_register_displacement((word)sizeof(oh));
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}
|
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|
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size_t GC_debug_header_size = sizeof(oh);
|
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|
|
# 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);
|
|
} else {
|
|
size_t i;
|
|
size_t obj_sz = hhdr -> hb_sz - BYTES_TO_WORDS(sizeof(oh));
|
|
|
|
for (i = 0; i < obj_sz; ++i) ((word *)p)[i] = 0xdeadbeef;
|
|
GC_ASSERT((word *)p + i == (word *)base + hhdr -> hb_sz);
|
|
}
|
|
} /* !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) return;
|
|
if ((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) return;
|
|
if ((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_unreachable
|
|
(GC_PTR obj, GC_finalization_proc fn,
|
|
GC_PTR cd, GC_finalization_proc *ofn,
|
|
GC_PTR *ocd)
|
|
# else
|
|
void GC_debug_register_finalizer_unreachable
|
|
(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) return;
|
|
if ((ptr_t)obj - base != sizeof(oh)) {
|
|
GC_err_printf1(
|
|
"GC_debug_register_finalizer_unreachable called with non-base-pointer 0x%lx\n",
|
|
obj);
|
|
}
|
|
if (0 == fn) {
|
|
GC_register_finalizer_unreachable(base, 0, 0, &my_old_fn, &my_old_cd);
|
|
} else {
|
|
GC_register_finalizer_unreachable(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) return;
|
|
if ((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);
|
|
}
|