25 #include "dbus-memory.h"
26 #include "dbus-internals.h"
27 #include "dbus-sysdeps.h"
28 #include "dbus-list.h"
99 #ifdef DBUS_BUILD_TESTS
101 static int fail_nth = -1;
102 static size_t fail_size = 0;
104 static int n_failures_per_failure = 1;
105 static int n_failures_this_failure = 0;
112 #define GUARD_VALUE 0xdeadbeef
114 #define GUARD_INFO_SIZE 8
116 #define GUARD_START_PAD 16
118 #define GUARD_END_PAD 16
120 #define GUARD_START_OFFSET (GUARD_START_PAD + GUARD_INFO_SIZE)
122 #define GUARD_EXTRA_SIZE (GUARD_START_OFFSET + GUARD_END_PAD)
125 _dbus_initialize_malloc_debug (
void)
127 if (!debug_initialized)
129 debug_initialized =
TRUE;
133 fail_nth = atoi (
_dbus_getenv (
"DBUS_MALLOC_FAIL_NTH"));
134 fail_alloc_counter = fail_nth;
135 _dbus_verbose (
"Will fail malloc every %d times\n", fail_nth);
140 fail_size = atoi (
_dbus_getenv (
"DBUS_MALLOC_FAIL_GREATER_THAN"));
141 _dbus_verbose (
"Will fail mallocs over %ld bytes\n",
148 _dbus_verbose (
"Will use malloc guards\n");
153 disable_mem_pools =
TRUE;
154 _dbus_verbose (
"Will disable memory pools\n");
159 backtrace_on_fail_alloc =
TRUE;
160 _dbus_verbose (
"Will backtrace on failing a malloc\n");
171 _dbus_disable_mem_pools (
void)
173 _dbus_initialize_malloc_debug ();
174 return disable_mem_pools;
186 _dbus_set_fail_alloc_counter (
int until_next_fail)
188 _dbus_initialize_malloc_debug ();
190 fail_alloc_counter = until_next_fail;
193 _dbus_verbose (
"Set fail alloc counter = %d\n", fail_alloc_counter);
204 _dbus_get_fail_alloc_counter (
void)
206 _dbus_initialize_malloc_debug ();
208 return fail_alloc_counter;
218 _dbus_set_fail_alloc_failures (
int failures_per_failure)
220 n_failures_per_failure = failures_per_failure;
230 _dbus_get_fail_alloc_failures (
void)
232 return n_failures_per_failure;
235 #ifdef DBUS_BUILD_TESTS
246 _dbus_decrement_fail_alloc_counter (
void)
248 _dbus_initialize_malloc_debug ();
249 #ifdef DBUS_WIN_FIXME
253 _dbus_verbose(
"TODO: memory allocation testing errors disabled for now\n");
260 if (fail_alloc_counter <= 0)
262 if (backtrace_on_fail_alloc)
265 _dbus_verbose (
"failure %d\n", n_failures_this_failure);
267 n_failures_this_failure += 1;
268 if (n_failures_this_failure >= n_failures_per_failure)
271 fail_alloc_counter = fail_nth;
275 n_failures_this_failure = 0;
277 _dbus_verbose (
"reset fail alloc counter to %d\n", fail_alloc_counter);
284 fail_alloc_counter -= 1;
296 _dbus_get_malloc_blocks_outstanding (
void)
298 return n_blocks_outstanding.
value;
314 source_string (BlockSource source)
324 case SOURCE_MALLOC_ZERO:
326 case SOURCE_REALLOC_NULL:
327 return "realloc(NULL)";
334 check_guards (
void *free_block,
337 if (free_block !=
NULL)
339 unsigned char *block = ((
unsigned char*)free_block) - GUARD_START_OFFSET;
348 _dbus_verbose (
"Checking %d bytes request from source %s\n",
349 requested_bytes, source_string (source));
353 while (i < GUARD_START_OFFSET)
356 if (value != GUARD_VALUE)
358 _dbus_warn (
"Block of %lu bytes from %s had start guard value 0x%ux at %d expected 0x%x\n",
359 (
long) requested_bytes, source_string (source),
360 value, i, GUARD_VALUE);
367 i = GUARD_START_OFFSET + requested_bytes;
368 while (i < (GUARD_START_OFFSET + requested_bytes + GUARD_END_PAD))
371 if (value != GUARD_VALUE)
373 _dbus_warn (
"Block of %lu bytes from %s had end guard value 0x%ux at %d expected 0x%x\n",
374 (
long) requested_bytes, source_string (source),
375 value, i, GUARD_VALUE);
384 memset (free_block,
'g', requested_bytes);
392 set_guards (
void *real_block,
393 size_t requested_bytes,
396 unsigned char *block = real_block;
402 _dbus_assert (GUARD_START_OFFSET + GUARD_END_PAD == GUARD_EXTRA_SIZE);
408 while (i < GUARD_START_OFFSET)
415 i = GUARD_START_OFFSET + requested_bytes;
416 while (i < (GUARD_START_OFFSET + requested_bytes + GUARD_END_PAD))
423 check_guards (block + GUARD_START_OFFSET,
FALSE);
425 return block + GUARD_START_OFFSET;
454 #ifdef DBUS_BUILD_TESTS
455 _dbus_initialize_malloc_debug ();
457 if (_dbus_decrement_fail_alloc_counter ())
459 _dbus_verbose (
" FAILING malloc of %ld bytes\n", (
long) bytes);
466 #ifdef DBUS_BUILD_TESTS
467 else if (fail_size != 0 && bytes > fail_size)
473 block = malloc (bytes + GUARD_EXTRA_SIZE);
477 return set_guards (block, bytes, SOURCE_MALLOC);
483 mem = malloc (bytes);
484 #ifdef DBUS_BUILD_TESTS
507 #ifdef DBUS_BUILD_TESTS
508 _dbus_initialize_malloc_debug ();
510 if (_dbus_decrement_fail_alloc_counter ())
512 _dbus_verbose (
" FAILING malloc0 of %ld bytes\n", (
long) bytes);
520 #ifdef DBUS_BUILD_TESTS
521 else if (fail_size != 0 && bytes > fail_size)
527 block = calloc (bytes + GUARD_EXTRA_SIZE, 1);
530 return set_guards (block, bytes, SOURCE_MALLOC_ZERO);
536 mem = calloc (bytes, 1);
537 #ifdef DBUS_BUILD_TESTS
559 #ifdef DBUS_BUILD_TESTS
560 _dbus_initialize_malloc_debug ();
562 if (_dbus_decrement_fail_alloc_counter ())
564 _dbus_verbose (
" FAILING realloc of %ld bytes\n", (
long) bytes);
575 #ifdef DBUS_BUILD_TESTS
576 else if (fail_size != 0 && bytes > fail_size)
585 check_guards (memory,
FALSE);
587 block = realloc (((
unsigned char*)memory) - GUARD_START_OFFSET,
588 bytes + GUARD_EXTRA_SIZE);
591 if (block && bytes >= old_bytes)
593 check_guards (((
unsigned char*)block) + GUARD_START_OFFSET,
FALSE);
595 return set_guards (block, bytes, SOURCE_REALLOC);
601 block = malloc (bytes + GUARD_EXTRA_SIZE);
606 return set_guards (block, bytes, SOURCE_REALLOC_NULL);
613 mem = realloc (memory, bytes);
614 #ifdef DBUS_BUILD_TESTS
631 #ifdef DBUS_BUILD_TESTS
634 check_guards (memory,
TRUE);
641 free (((
unsigned char*)memory) - GUARD_START_OFFSET);
650 #ifdef DBUS_BUILD_TESTS
743 c->
next = registered_globals;
744 registered_globals = c;
800 while (registered_globals !=
NULL)
804 c = registered_globals;
805 registered_globals = c->
next;
812 _dbus_current_generation += 1;
817 #ifdef DBUS_BUILD_TESTS
818 #include "dbus-test.h"
826 _dbus_memory_test (
void)
837 for (size = 4; size < 256; size += 4)
843 for (size = 256; size != 0; size -= 4)