| /* |
| * 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" |
| |
| 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\n", (unsigned long)base); |
| goto out; |
| case GC_REFD_FROM_REG: |
| GC_err_printf0("root in register\n\n"); |
| goto out; |
| case GC_FINALIZER_REFD: |
| GC_err_printf0("list of finalizable objects\n\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_no_gc(void) |
| { |
| void * current; |
| current = GC_generate_random_valid_address(); |
| GC_printf1("\n****Chose address 0x%lx in object\n", (unsigned long)current); |
| GC_print_backtrace(current); |
| } |
| |
| void GC_generate_random_backtrace(void) |
| { |
| GC_gcollect(); |
| GC_generate_random_backtrace_no_gc(); |
| } |
| |
| #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 */ |
| |
| static GC_describe_type_fn GC_describe_type_fns[MAXOBJKINDS] = {0}; |
| |
| void GC_register_describe_type_fn(kind, fn) |
| int kind; |
| GC_describe_type_fn fn; |
| { |
| GC_describe_type_fns[kind] = fn; |
| } |
| |
| /* Print a type description for the object whose client-visible address */ |
| /* is p. */ |
| void GC_print_type(p) |
| ptr_t p; |
| { |
| hdr * hhdr = GC_find_header(p); |
| char buffer[GC_TYPE_DESCR_LEN + 1]; |
| int kind = hhdr -> hb_obj_kind; |
| |
| if (0 != GC_describe_type_fns[kind] && GC_is_marked(GC_base(p))) { |
| /* This should preclude free list objects except with */ |
| /* thread-local allocation. */ |
| buffer[GC_TYPE_DESCR_LEN] = 0; |
| (GC_describe_type_fns[kind])(p, buffer); |
| GC_ASSERT(buffer[GC_TYPE_DESCR_LEN] == 0); |
| GC_err_puts(buffer); |
| } else { |
| switch(kind) { |
| case PTRFREE: |
| GC_err_puts("PTRFREE"); |
| break; |
| case NORMAL: |
| GC_err_puts("NORMAL"); |
| break; |
| case UNCOLLECTABLE: |
| GC_err_puts("UNCOLLECTABLE"); |
| break; |
| # ifdef ATOMIC_UNCOLLECTABLE |
| case AUNCOLLECTABLE: |
| GC_err_puts("ATOMIC UNCOLLECTABLE"); |
| break; |
| # endif |
| case STUBBORN: |
| GC_err_puts("STUBBORN"); |
| break; |
| default: |
| GC_err_printf2("kind %ld, descr 0x%lx", kind, hhdr -> hb_descr); |
| } |
| } |
| } |
| |
| |
| |
| 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, ", (unsigned long)(ohdr -> oh_int)); |
| # else |
| GC_err_printf2(":%ld, sz=%ld, ", (unsigned long)(ohdr -> oh_int), |
| (unsigned long)(ohdr -> oh_sz)); |
| # endif |
| GC_print_type((ptr_t)(ohdr + 1)); |
| GC_err_puts(")\n"); |
| 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)); |
| } |
| |
| size_t GC_debug_header_size = 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); |
| } 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); |
| } |