static void
check_one_map (Map **inout,
gpointer data,
gsize len,
const char *filename)
{
Map *map;
/* stop if have we already encountered this map. */
for (map = *inout; map; map = map->next)
if (map->start == data && map->len == len)
return;
/* allocate a new Map record */
map = malloc (sizeof(Map));
map->start = data;
map->len = len;
map->next = *inout;
*inout = map;
/* output a new Map log entry */
log_uint (LOG_MAGIC_MAP);
log_pointer (data);
log_uint (len);
log_uint (strlen (filename));
log_binary (filename, strlen (filename));
}
static char* log_copy(uint32_t length, char *log)
{
char *buffer;
log_free(log_pool.size);
buffer = log_pointer(log_alloc(length));
strncpy(buffer, log, length);
return buffer;
}
static gpointer
debug_malloc (gsize n_bytes)
{
guint total_levels = stack_depth + stack_levels_to_ignore;
gpointer *context = g_newa (gpointer, total_levels);
guint n_levels = gsk_backtrace (context, total_levels);
AllocationContext *ac;
AllocationHeader *header;
if (n_bytes == 0)
return NULL;
if (n_levels <= stack_levels_to_ignore)
n_levels = 0;
else
n_levels -= stack_levels_to_ignore;
context += stack_levels_to_ignore;
ac = get_allocate_context (n_levels, context);
ac->n_bytes_used += n_bytes;
ac->n_blocks_used += 1;
header = malloc (sizeof (AllocationHeader) + n_bytes + 4);
assert (header != NULL);
header->size = n_bytes;
header->context = ac;
memcpy (header->underrun_detection_magic, underrun_detection_magic, 4);
memcpy ((char*)(header + 1) + n_bytes, overrun_detection_magic, 4);
if (log_fd >= 0)
{
guint i;
check_needs_map_entries (n_levels, context);
log_uint (LOG_MAGIC_MALLOC);
log_uint (n_bytes);
log_uint (n_levels);
for (i = 0; i < n_levels; i++)
log_pointer (context[i]);
log_pointer (header + 1);
}
return header + 1;
}
static gpointer
debug_realloc (gpointer mem,
gsize n_bytes)
{
#if 0
AllocationHeader *header = ((AllocationHeader*)mem) - 1;
guint old_size;
assert (memcmp (header->underrun_detection_magic, underrun_detection_magic, 4) == 0);
assert (memcmp ((char*)(header + 1) + header->size, overrun_detection_magic, 4) == 0);
assert (header->context->n_bytes_used >= header->size);
old_size = header->size;
header = realloc (header, sizeof (AllocationHeader) + n_bytes + 4);
header->size = n_bytes;
memcpy ((char*)(header + 1) + n_bytes, overrun_detection_magic, 4);
header->context->n_bytes_used -= old_size;
header->context->n_bytes_used += n_bytes;
return header + 1;
#else
void *rv;
guint size;
if (mem)
{
AllocationHeader *header = ((AllocationHeader*)mem) - 1;
assert (memcmp (header->underrun_detection_magic, underrun_detection_magic, 4) == 0);
size = header->size;
assert (memcmp ((char*)(header + 1) + size, overrun_detection_magic, 4) == 0);
assert (header->context->n_bytes_used >= size);
}
else
size = 0;
if (log_fd >= 0)
{
log_uint (LOG_MAGIC_REALLOC);
log_pointer (mem);
log_uint (size);
}
stack_levels_to_ignore++;
rv = debug_malloc (n_bytes);
memcpy (rv, mem, MIN (n_bytes, size));
debug_free (mem);
stack_levels_to_ignore--;
return rv;
#endif
}
static void
debug_free (gpointer mem)
{
AllocationHeader *header = ((AllocationHeader*)mem) - 1;
if (mem == NULL)
return;
assert (memcmp (header->underrun_detection_magic, underrun_detection_magic, 4) == 0);
assert (memcmp ((char*)(header + 1) + header->size, overrun_detection_magic, 4) == 0);
assert (header->context->n_bytes_used >= header->size);
memset (header->underrun_detection_magic, 0, 4);
memset ((char*)(header + 1) + header->size, 0, 4);
memset (mem, 0xaf, header->size);
if (log_fd >= 0)
{
guint i;
guint total_levels = stack_depth + stack_levels_to_ignore;
gpointer *context = g_newa (gpointer, total_levels);
guint n_levels = gsk_backtrace (context, total_levels);
log_uint (LOG_MAGIC_FREE);
if (n_levels < stack_levels_to_ignore)
n_levels = 0;
else
n_levels -= stack_levels_to_ignore;
context += stack_levels_to_ignore;
log_uint (header->size);
log_uint (n_levels);
for (i = 0; i < n_levels; i++)
log_pointer (context[i]);
log_pointer (mem);
}
header->context->n_bytes_used -= header->size;
header->context->n_blocks_used -= 1;
free (header);
}
static void log_uint (guint i)
{
log_pointer (GUINT_TO_POINTER (i));
}
