25 #include "dbus-memory.h"
26 #include "dbus-internals.h"
27 #include "dbus-sysdeps.h"
28 #include "dbus-list.h"
29 #include "dbus-threads.h"
100 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
102 static int fail_nth = -1;
103 static size_t fail_size = 0;
105 static int n_failures_per_failure = 1;
106 static int n_failures_this_failure = 0;
114 #define GUARD_VALUE 0xdeadbeef
116 #define GUARD_INFO_SIZE 8
118 #define GUARD_START_PAD 16
120 #define GUARD_END_PAD 16
122 #define GUARD_START_OFFSET (GUARD_START_PAD + GUARD_INFO_SIZE)
124 #define GUARD_EXTRA_SIZE (GUARD_START_OFFSET + GUARD_END_PAD)
127 _dbus_initialize_malloc_debug (
void)
129 if (!debug_initialized)
131 debug_initialized =
TRUE;
135 fail_nth = atoi (
_dbus_getenv (
"DBUS_MALLOC_FAIL_NTH"));
136 fail_alloc_counter = fail_nth;
137 _dbus_verbose (
"Will fail dbus_malloc every %d times\n", fail_nth);
142 fail_size = atoi (
_dbus_getenv (
"DBUS_MALLOC_FAIL_GREATER_THAN"));
143 _dbus_verbose (
"Will fail mallocs over %ld bytes\n",
150 _dbus_verbose (
"Will use dbus_malloc guards\n");
155 disable_mem_pools =
TRUE;
156 _dbus_verbose (
"Will disable memory pools\n");
161 backtrace_on_fail_alloc =
TRUE;
162 _dbus_verbose (
"Will backtrace on failing a dbus_malloc\n");
167 malloc_cannot_fail =
TRUE;
168 _dbus_verbose (
"Will abort if system malloc() and friends fail\n");
179 _dbus_disable_mem_pools (
void)
181 _dbus_initialize_malloc_debug ();
182 return disable_mem_pools;
194 _dbus_set_fail_alloc_counter (
int until_next_fail)
196 _dbus_initialize_malloc_debug ();
198 fail_alloc_counter = until_next_fail;
201 _dbus_verbose (
"Set fail alloc counter = %d\n", fail_alloc_counter);
212 _dbus_get_fail_alloc_counter (
void)
214 _dbus_initialize_malloc_debug ();
216 return fail_alloc_counter;
226 _dbus_set_fail_alloc_failures (
int failures_per_failure)
228 n_failures_per_failure = failures_per_failure;
238 _dbus_get_fail_alloc_failures (
void)
240 return n_failures_per_failure;
243 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
253 _dbus_decrement_fail_alloc_counter (
void)
255 _dbus_initialize_malloc_debug ();
256 #ifdef DBUS_WIN_FIXME
262 _dbus_verbose(
"TODO: memory allocation testing errors disabled for now\n");
269 if (fail_alloc_counter <= 0)
271 if (backtrace_on_fail_alloc)
274 _dbus_verbose (
"failure %d\n", n_failures_this_failure);
276 n_failures_this_failure += 1;
277 if (n_failures_this_failure >= n_failures_per_failure)
280 fail_alloc_counter = fail_nth;
284 n_failures_this_failure = 0;
286 _dbus_verbose (
"reset fail alloc counter to %d\n", fail_alloc_counter);
293 fail_alloc_counter -= 1;
305 _dbus_get_malloc_blocks_outstanding (
void)
323 source_string (BlockSource source)
333 case SOURCE_MALLOC_ZERO:
335 case SOURCE_REALLOC_NULL:
336 return "realloc(NULL)";
344 check_guards (
void *free_block,
347 if (free_block !=
NULL)
349 unsigned char *block = ((
unsigned char*)free_block) - GUARD_START_OFFSET;
358 _dbus_verbose (
"Checking %d bytes request from source %s\n",
359 requested_bytes, source_string (source));
363 while (i < GUARD_START_OFFSET)
366 if (value != GUARD_VALUE)
368 _dbus_warn (
"Block of %lu bytes from %s had start guard value 0x%ux at %d expected 0x%x",
369 (
long) requested_bytes, source_string (source),
370 value, i, GUARD_VALUE);
377 i = GUARD_START_OFFSET + requested_bytes;
378 while (i < (GUARD_START_OFFSET + requested_bytes + GUARD_END_PAD))
381 if (value != GUARD_VALUE)
383 _dbus_warn (
"Block of %lu bytes from %s had end guard value 0x%ux at %d expected 0x%x",
384 (
long) requested_bytes, source_string (source),
385 value, i, GUARD_VALUE);
394 memset (free_block,
'g', requested_bytes);
402 set_guards (
void *real_block,
403 size_t requested_bytes,
406 unsigned char *block = real_block;
412 _dbus_assert (GUARD_START_OFFSET + GUARD_END_PAD == GUARD_EXTRA_SIZE);
418 while (i < GUARD_START_OFFSET)
425 i = GUARD_START_OFFSET + requested_bytes;
426 while (i < (GUARD_START_OFFSET + requested_bytes + GUARD_END_PAD))
433 check_guards (block + GUARD_START_OFFSET,
FALSE);
435 return block + GUARD_START_OFFSET;
464 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
465 _dbus_initialize_malloc_debug ();
467 if (_dbus_decrement_fail_alloc_counter ())
469 _dbus_verbose (
" FAILING malloc of %ld bytes\n", (
long) bytes);
476 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
477 else if (fail_size != 0 && bytes > fail_size)
483 block = malloc (bytes + GUARD_EXTRA_SIZE);
488 else if (malloc_cannot_fail)
490 _dbus_warn (
"out of memory: malloc (%ld + %ld)",
491 (
long) bytes, (
long) GUARD_EXTRA_SIZE);
495 return set_guards (block, bytes, SOURCE_MALLOC);
501 mem = malloc (bytes);
503 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
508 else if (malloc_cannot_fail)
510 _dbus_warn (
"out of memory: malloc (%ld)", (
long) bytes);
534 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
535 _dbus_initialize_malloc_debug ();
537 if (_dbus_decrement_fail_alloc_counter ())
539 _dbus_verbose (
" FAILING malloc0 of %ld bytes\n", (
long) bytes);
547 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
548 else if (fail_size != 0 && bytes > fail_size)
554 block = calloc (bytes + GUARD_EXTRA_SIZE, 1);
560 else if (malloc_cannot_fail)
562 _dbus_warn (
"out of memory: calloc (%ld + %ld, 1)",
563 (
long) bytes, (
long) GUARD_EXTRA_SIZE);
567 return set_guards (block, bytes, SOURCE_MALLOC_ZERO);
573 mem = calloc (bytes, 1);
575 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
580 else if (malloc_cannot_fail)
582 _dbus_warn (
"out of memory: calloc (%ld)", (
long) bytes);
605 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
606 _dbus_initialize_malloc_debug ();
608 if (_dbus_decrement_fail_alloc_counter ())
610 _dbus_verbose (
" FAILING realloc of %ld bytes\n", (
long) bytes);
621 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
622 else if (fail_size != 0 && bytes > fail_size)
631 check_guards (memory,
FALSE);
633 block = realloc (((
unsigned char*)memory) - GUARD_START_OFFSET,
634 bytes + GUARD_EXTRA_SIZE);
638 if (malloc_cannot_fail)
640 _dbus_warn (
"out of memory: realloc (%p, %ld + %ld)",
641 memory, (
long) bytes, (
long) GUARD_EXTRA_SIZE);
649 if (bytes >= old_bytes)
651 check_guards (((
unsigned char*)block) + GUARD_START_OFFSET,
FALSE);
653 return set_guards (block, bytes, SOURCE_REALLOC);
659 block = malloc (bytes + GUARD_EXTRA_SIZE);
665 else if (malloc_cannot_fail)
667 _dbus_warn (
"out of memory: malloc (%ld + %ld)",
668 (
long) bytes, (
long) GUARD_EXTRA_SIZE);
672 return set_guards (block, bytes, SOURCE_REALLOC_NULL);
679 mem = realloc (memory, bytes);
681 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
682 if (mem ==
NULL && malloc_cannot_fail)
684 _dbus_warn (
"out of memory: malloc (%ld)", (
long) bytes);
704 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
707 check_guards (memory,
TRUE);
710 #ifdef DBUS_DISABLE_ASSERT
719 free (((
unsigned char*)memory) - GUARD_START_OFFSET);
728 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
729 #ifdef DBUS_DISABLE_ASSERT
819 ok = _dbus_register_shutdown_func_unlocked (func, data);
825 _dbus_register_shutdown_func_unlocked (DBusShutdownFunction func,
838 c->
next = registered_globals;
839 registered_globals = c;
900 while (registered_globals !=
NULL)
904 c = registered_globals;
905 registered_globals = c->
next;
917 _dbus_current_generation += 1;
923 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
924 #include "dbus-test.h"
932 _dbus_memory_test (
void)
943 for (size = 4; size < 256; size += 4)
949 for (size = 256; size != 0; size -= 4)