27#include "dbus-memory.h" 
   28#include "dbus-internals.h" 
   29#include "dbus-sysdeps.h" 
   31#include "dbus-threads.h" 
   32#include <dbus/dbus-test-tap.h> 
  103#ifdef DBUS_ENABLE_EMBEDDED_TESTS 
  106static int fail_nth = -1;
 
  107static size_t fail_size = 0;
 
  108static int fail_alloc_counter = -1;
 
  109static int n_failures_per_failure = 1;
 
  110static int n_failures_this_failure = 0;
 
  118#define GUARD_VALUE 0xdeadbeef 
  120#define GUARD_INFO_SIZE 8 
  122#define GUARD_START_PAD 16 
  124#define GUARD_END_PAD 16 
  126#define GUARD_START_OFFSET (GUARD_START_PAD + GUARD_INFO_SIZE) 
  128#define GUARD_EXTRA_SIZE (GUARD_START_OFFSET + GUARD_END_PAD) 
  131_dbus_initialize_malloc_debug (
void)
 
  133  if (!debug_initialized)
 
  135      debug_initialized = 
TRUE;
 
  139          fail_nth = atoi (
_dbus_getenv (
"DBUS_MALLOC_FAIL_NTH"));
 
  140          fail_alloc_counter = fail_nth;
 
  141          _dbus_verbose (
"Will fail dbus_malloc every %d times\n", fail_nth);
 
  146          fail_size = atoi (
_dbus_getenv (
"DBUS_MALLOC_FAIL_GREATER_THAN"));
 
  147          _dbus_verbose (
"Will fail mallocs over %ld bytes\n",
 
  154          _dbus_verbose (
"Will use dbus_malloc guards\n");
 
  159          disable_mem_pools = 
TRUE;
 
  160          _dbus_verbose (
"Will disable memory pools\n");
 
  165          backtrace_on_fail_alloc = 
TRUE;
 
  166          _dbus_verbose (
"Will backtrace on failing a dbus_malloc\n");
 
  171          malloc_cannot_fail = 
TRUE;
 
  172          _dbus_verbose (
"Will abort if system malloc() and friends fail\n");
 
  183_dbus_disable_mem_pools (
void)
 
  185  _dbus_initialize_malloc_debug ();
 
  186  return disable_mem_pools;
 
  202_dbus_set_fail_alloc_counter (
int until_next_fail)
 
  204  _dbus_initialize_malloc_debug ();
 
  206  fail_alloc_counter = until_next_fail;
 
  209  _dbus_verbose (
"Set fail alloc counter = %d\n", fail_alloc_counter);
 
  224_dbus_get_fail_alloc_counter (
void)
 
  226  _dbus_initialize_malloc_debug ();
 
  228  return fail_alloc_counter;
 
  238_dbus_set_fail_alloc_failures (
int failures_per_failure)
 
  240  n_failures_per_failure = failures_per_failure;
 
  250_dbus_get_fail_alloc_failures (
void)
 
  252  return n_failures_per_failure;
 
  264_dbus_decrement_fail_alloc_counter (
void)
 
  266  _dbus_initialize_malloc_debug ();
 
  268  if (fail_alloc_counter < 0)
 
  275        fail_alloc_counter -= 1;
 
  279  else if (fail_alloc_counter == 0)
 
  282      if (backtrace_on_fail_alloc)
 
  283        _dbus_print_backtrace ();
 
  285      _dbus_verbose (
"failure %d\n", n_failures_this_failure);
 
  287      n_failures_this_failure += 1;
 
  288      if (n_failures_this_failure >= n_failures_per_failure)
 
  290          fail_alloc_counter = fail_nth;
 
  291          n_failures_this_failure = 0;
 
  293          _dbus_verbose (
"reset fail alloc counter to %d\n", fail_alloc_counter);
 
  302      fail_alloc_counter -= 1;
 
  313_dbus_get_malloc_blocks_outstanding (
void)
 
  331source_string (BlockSource source)
 
  341    case SOURCE_MALLOC_ZERO:
 
  343    case SOURCE_REALLOC_NULL:
 
  344      return "realloc(NULL)";
 
  352check_guards (
void       *free_block,
 
  355  if (free_block != 
NULL)
 
  357      unsigned char *block = ((
unsigned char*)free_block) - GUARD_START_OFFSET;
 
  359      BlockSource source = *(
dbus_uint32_t *) (
void *) (block + 4);
 
  366      _dbus_verbose (
"Checking %d bytes request from source %s\n",
 
  367                     requested_bytes, source_string (source));
 
  371      while (i < GUARD_START_OFFSET)
 
  374          if (value != GUARD_VALUE)
 
  376              _dbus_warn (
"Block of %lu bytes from %s had start guard value 0x%ux at %d expected 0x%x",
 
  377                          (
long) requested_bytes, source_string (source),
 
  378                          value, i, GUARD_VALUE);
 
  385      i = GUARD_START_OFFSET + requested_bytes;
 
  386      while (i < (GUARD_START_OFFSET + requested_bytes + GUARD_END_PAD))
 
  389          if (value != GUARD_VALUE)
 
  391              _dbus_warn (
"Block of %lu bytes from %s had end guard value 0x%ux at %d expected 0x%x",
 
  392                          (
long) requested_bytes, source_string (source),
 
  393                          value, i, GUARD_VALUE);
 
  402        memset (free_block, 
'g', requested_bytes);
 
  410set_guards (
void       *real_block,
 
  411            size_t      requested_bytes,
 
  414  unsigned char *block = real_block;
 
  420  _dbus_assert (GUARD_START_OFFSET + GUARD_END_PAD == GUARD_EXTRA_SIZE);
 
  426  while (i < GUARD_START_OFFSET)
 
  433  i = GUARD_START_OFFSET + requested_bytes;
 
  434  while (i < (GUARD_START_OFFSET + requested_bytes + GUARD_END_PAD))
 
  441  check_guards (block + GUARD_START_OFFSET, 
FALSE);
 
  443  return block + GUARD_START_OFFSET;
 
  472#ifdef DBUS_ENABLE_EMBEDDED_TESTS 
  473  _dbus_initialize_malloc_debug ();
 
  475  if (_dbus_decrement_fail_alloc_counter ())
 
  477      _dbus_verbose (
" FAILING malloc of %ld bytes\n", (
long) bytes);
 
  484#ifdef DBUS_ENABLE_EMBEDDED_TESTS 
  485  else if (fail_size != 0 && bytes > fail_size)
 
  491      block = malloc (bytes + GUARD_EXTRA_SIZE);
 
  496      else if (malloc_cannot_fail)
 
  498          _dbus_warn (
"out of memory: malloc (%ld + %ld)",
 
  499              (
long) bytes, (
long) GUARD_EXTRA_SIZE);
 
  503      return set_guards (block, bytes, SOURCE_MALLOC);
 
  509      mem = malloc (bytes);
 
  511#ifdef DBUS_ENABLE_EMBEDDED_TESTS 
  516      else if (malloc_cannot_fail)
 
  518          _dbus_warn (
"out of memory: malloc (%ld)", (
long) bytes);
 
 
  542#ifdef DBUS_ENABLE_EMBEDDED_TESTS 
  543  _dbus_initialize_malloc_debug ();
 
  545  if (_dbus_decrement_fail_alloc_counter ())
 
  547      _dbus_verbose (
" FAILING malloc0 of %ld bytes\n", (
long) bytes);
 
  555#ifdef DBUS_ENABLE_EMBEDDED_TESTS 
  556  else if (fail_size != 0 && bytes > fail_size)
 
  562      block = calloc (bytes + GUARD_EXTRA_SIZE, 1);
 
  568      else if (malloc_cannot_fail)
 
  570          _dbus_warn (
"out of memory: calloc (%ld + %ld, 1)",
 
  571              (
long) bytes, (
long) GUARD_EXTRA_SIZE);
 
  575      return set_guards (block, bytes, SOURCE_MALLOC_ZERO);
 
  581      mem = calloc (bytes, 1);
 
  583#ifdef DBUS_ENABLE_EMBEDDED_TESTS 
  588      else if (malloc_cannot_fail)
 
  590          _dbus_warn (
"out of memory: calloc (%ld)", (
long) bytes);
 
 
  613#ifdef DBUS_ENABLE_EMBEDDED_TESTS 
  614  _dbus_initialize_malloc_debug ();
 
  616  if (_dbus_decrement_fail_alloc_counter ())
 
  618      _dbus_verbose (
" FAILING realloc of %ld bytes\n", (
long) bytes);
 
  629#ifdef DBUS_ENABLE_EMBEDDED_TESTS 
  630  else if (fail_size != 0 && bytes > fail_size)
 
  639          check_guards (memory, 
FALSE);
 
  641          block = realloc (((
unsigned char*)memory) - GUARD_START_OFFSET,
 
  642                           bytes + GUARD_EXTRA_SIZE);
 
  646              if (malloc_cannot_fail)
 
  648                  _dbus_warn (
"out of memory: realloc (%p, %ld + %ld)",
 
  649                      memory, (
long) bytes, (
long) GUARD_EXTRA_SIZE);
 
  657          if (bytes >= old_bytes)
 
  659            check_guards (((
unsigned char*)block) + GUARD_START_OFFSET, 
FALSE);
 
  661          return set_guards (block, bytes, SOURCE_REALLOC);
 
  667          block = malloc (bytes + GUARD_EXTRA_SIZE);
 
  673          else if (malloc_cannot_fail)
 
  675              _dbus_warn (
"out of memory: malloc (%ld + %ld)",
 
  676                  (
long) bytes, (
long) GUARD_EXTRA_SIZE);
 
  680          return set_guards (block, bytes, SOURCE_REALLOC_NULL);   
 
  687      mem = realloc (memory, bytes);
 
  689#ifdef DBUS_ENABLE_EMBEDDED_TESTS 
  690      if (mem == 
NULL && malloc_cannot_fail)
 
  692          _dbus_warn (
"out of memory: malloc (%ld)", (
long) bytes);
 
 
  712#ifdef DBUS_ENABLE_EMBEDDED_TESTS 
  715      check_guards (memory, 
TRUE);
 
  718#ifdef DBUS_DISABLE_ASSERT 
  727          free (((
unsigned char*)memory) - GUARD_START_OFFSET);
 
  736#ifdef DBUS_ENABLE_EMBEDDED_TESTS 
  737#ifdef DBUS_DISABLE_ASSERT 
 
  827  ok = _dbus_register_shutdown_func_unlocked (func, data);
 
 
  833_dbus_register_shutdown_func_unlocked (DBusShutdownFunction  func,
 
  846  c->
next = registered_globals;
 
  847  registered_globals = c;
 
  908  while (registered_globals != 
NULL)
 
  912      c = registered_globals;
 
  913      registered_globals = c->
next;
 
 
  931#ifdef DBUS_ENABLE_EMBEDDED_TESTS 
  932#include "dbus-test.h" 
  940_dbus_memory_test (
const char *test_data_dir _DBUS_GNUC_UNUSED)
 
  950    _dbus_test_fatal (
"no memory");
 
  951  for (size = 4; size < 256; size += 4)
 
  955        _dbus_test_fatal (
"no memory");
 
  957  for (size = 256; size != 0; size -= 4)
 
  961        _dbus_test_fatal (
"no memory");
 
#define _dbus_assert_not_reached(explanation)
Aborts with an error message if called.
#define _dbus_assert(condition)
Aborts with an error message if the condition is false.
#define _DBUS_UNLOCK(name)
Unlocks a global lock.
#define _DBUS_LOCK(name)
Locks a global lock, initializing it first if necessary.
#define _DBUS_INT_MIN
Minimum value of type "int".
void _dbus_warn(const char *format,...)
Prints a warning message to stderr.
#define NULL
A null pointer, defined appropriately for C or C++.
#define TRUE
Expands to "1".
#define FALSE
Expands to "0".
int _dbus_current_generation
_dbus_current_generation is used to track each time that dbus_shutdown() is called,...
dbus_bool_t _dbus_register_shutdown_func(DBusShutdownFunction func, void *data)
Register a cleanup function to be called exactly once the next time dbus_shutdown() is called.
void dbus_shutdown(void)
Frees all memory allocated internally by libdbus and reverses the effects of dbus_threads_init().
void dbus_free(void *memory)
Frees a block of memory previously allocated by dbus_malloc() or dbus_malloc0().
void * dbus_realloc(void *memory, size_t bytes)
Resizes a block of memory previously allocated by dbus_malloc() or dbus_malloc0().
#define dbus_new(type, count)
Safe macro for using dbus_malloc().
void * dbus_malloc0(size_t bytes)
Allocates the given number of bytes, as with standard malloc(), but all bytes are initialized to zero...
void dbus_free_string_array(char **str_array)
Frees a NULL-terminated array of strings.
void * dbus_malloc(size_t bytes)
Allocates the given number of bytes, as with standard malloc().
dbus_int32_t _dbus_atomic_dec(DBusAtomic *atomic)
Atomically decrement an integer.
const char * _dbus_getenv(const char *varname)
Wrapper for getenv().
dbus_int32_t _dbus_atomic_get(DBusAtomic *atomic)
Atomically get the value of an integer.
void _dbus_threads_lock_platform_specific(void)
Lock a static mutex used to protect _dbus_threads_init_platform_specific().
void _dbus_threads_unlock_platform_specific(void)
Undo _dbus_threads_lock_platform_specific().
dbus_int32_t _dbus_atomic_inc(DBusAtomic *atomic)
Atomically increments an integer.
void _dbus_abort(void)
Aborts the program with SIGABRT (dumping core).
unsigned int dbus_uint32_t
A 32-bit unsigned integer on all platforms.
int dbus_int32_t
A 32-bit signed integer on all platforms.
dbus_uint32_t dbus_bool_t
A boolean, valid values are TRUE and FALSE.
An atomic integer safe to increment or decrement from multiple threads.
This struct represents a function to be called on shutdown.
ShutdownClosure * next
Next ShutdownClosure.
DBusShutdownFunction func
Function to call.
void * data
Data for function.