static void
ft_mem_table_set( FT_MemTable table,
FT_Byte* address,
FT_ULong size )
{
FT_MemNode *pnode, node;
if ( table )
{
pnode = ft_mem_table_get_nodep( table, address );
node = *pnode;
if ( node )
{
if ( node->size < 0 )
{
/* this block was already freed. This means that our memory is */
/* now completely corrupted! */
ft_mem_debug_panic(
"memory heap corrupted (allocating freed block)" );
}
else
{
/* this block was already allocated. This means that our memory */
/* is also corrupted! */
ft_mem_debug_panic(
"memory heap corrupted (re-allocating allocated block)" );
}
}
/* we need to create a new node in this table */
node = (FT_MemNode)ft_mem_table_alloc( table, sizeof ( *node ) );
if ( node == NULL )
ft_mem_debug_panic( "not enough memory to run memory tests" );
node->address = address;
node->size = size;
node->alloc_file_name = table->file_name;
node->alloc_line_no = table->line_no;
node->free_file_name = NULL;
node->free_line_no = 0;
node->link = pnode[0];
pnode[0] = node;
table->nodes++;
table->alloc_total += size;
table->alloc_current += size;
if ( table->alloc_current > table->alloc_max )
table->alloc_max = table->alloc_current;
if ( table->nodes * 3 < table->size ||
table->size * 3 < table->nodes )
ft_mem_table_resize( table );
}
}
extern FT_Pointer
ft_mem_debug_realloc( FT_Memory memory,
FT_Long cur_size,
FT_Long new_size,
FT_Pointer block )
{
FT_MemTable table = (FT_MemTable)memory->user;
FT_MemNode node, *pnode;
FT_Pointer new_block;
const char* file_name = FT_FILENAME( table->file_name );
FT_Long line_no = table->line_no;
/* the following is valid according to ANSI C */
#if 0
if ( block == NULL || cur_size == 0 )
ft_mem_debug_panic( "trying to reallocate NULL in (%s:%ld)",
file_name, line_no );
#endif
/* while the following is allowed in ANSI C also, we abort since */
/* such case should be handled by FreeType. */
if ( new_size <= 0 )
ft_mem_debug_panic(
"trying to reallocate %p to size 0 (current is %ld) in (%s:%ld)",
block, cur_size, file_name, line_no );
/* check `cur_size' value */
pnode = ft_mem_table_get_nodep( table, (FT_Byte*)block );
node = *pnode;
if ( !node )
ft_mem_debug_panic(
"trying to reallocate unknown block at %p in (%s:%ld)",
block, file_name, line_no );
if ( node->size <= 0 )
ft_mem_debug_panic(
"trying to reallocate freed block at %p in (%s:%ld)",
block, file_name, line_no );
if ( node->size != cur_size )
ft_mem_debug_panic( "invalid ft_realloc request for %p. cur_size is "
"%ld instead of %ld in (%s:%ld)",
block, cur_size, node->size, file_name, line_no );
new_block = ft_mem_debug_alloc( memory, new_size );
if ( new_block == NULL )
return NULL;
ft_memcpy( new_block, block, cur_size < new_size ? cur_size : new_size );
table->file_name = file_name;
table->line_no = line_no;
ft_mem_debug_free( memory, (FT_Byte*)block );
return new_block;
}
extern FT_Pointer
ft_mem_debug_realloc( FT_Memory memory,
FT_Long cur_size,
FT_Long new_size,
FT_Pointer block )
{
FT_MemTable table = (FT_MemTable)memory->user;
FT_MemNode node, *pnode;
FT_Pointer new_block;
const char* file_name = FT_FILENAME( table->file_name );
FT_Long line_no = table->line_no;
if ( block == NULL || cur_size == 0 )
ft_mem_debug_panic( "trying to reallocate NULL in (%s:%ld)",
file_name, line_no );
if ( new_size <= 0 )
ft_mem_debug_panic(
"trying to reallocate %p to size 0 (current is %ld) in (%s:%ld)",
block, cur_size, file_name, line_no );
/* check 'cur_size' value */
pnode = ft_mem_table_get_nodep( table, (FT_Byte*)block );
node = *pnode;
if ( !node )
ft_mem_debug_panic(
"trying to reallocate unknown block at %p in (%s:%ld)",
block, file_name, line_no );
if ( node->size <= 0 )
ft_mem_debug_panic(
"trying to reallocate freed block at %p in (%s:%ld)",
block, file_name, line_no );
if ( node->size != cur_size )
ft_mem_debug_panic( "invalid ft_realloc request for %p. cur_size is "
"%ld instead of %ld in (%s:%ld)",
block, cur_size, node->size, file_name, line_no );
new_block = ft_mem_debug_alloc( memory, new_size );
if ( new_block == NULL )
return NULL;
ft_memcpy( new_block, block, cur_size < new_size ? cur_size : new_size );
table->file_name = file_name;
table->line_no = line_no;
ft_mem_debug_free( memory, (FT_Byte*)block );
return new_block;
}
extern FT_Pointer
ft_mem_debug_alloc( FT_Memory memory,
FT_Long size )
{
FT_MemTable table = (FT_MemTable)memory->user;
FT_Byte* block;
if ( size <= 0 )
ft_mem_debug_panic( "negative block size allocation (%ld)", size );
/* return NULL if the maximum number of allocations was reached */
if ( table->bound_count &&
table->alloc_count >= table->alloc_count_max )
return NULL;
/* return NULL if this allocation would overflow the maximum heap size */
if ( table->bound_total &&
table->alloc_current + (FT_ULong)size > table->alloc_total_max )
return NULL;
block = (FT_Byte *)ft_mem_table_alloc( table, size );
if ( block )
ft_mem_table_set( table, block, (FT_ULong)size );
table->alloc_count++;
table->file_name = NULL;
table->line_no = 0;
return (FT_Pointer) block;
}
static FT_Pointer
ft_mem_debug_alloc( FT_Memory memory,
FT_Long size )
{
FT_MemTable table = (FT_MemTable)memory->user;
FT_Byte* block;
if ( size <= 0 )
ft_mem_debug_panic( "negative block size allocation (%ld)", size );
/* return NULL if the maximum number of allocations was reached */
if ( table->bound_count &&
table->alloc_count >= table->alloc_count_max )
return NULL;
/* return NULL if this allocation would overflow the maximum heap size */
if ( table->bound_total &&
table->alloc_total_max - table->alloc_current > size )
return NULL;
block = (FT_Byte *)ft_mem_table_alloc( table, size );
if ( block )
{
ft_mem_table_set( table, block, size, 0 );
table->alloc_count++;
}
_ft_debug_file = "<unknown>";
_ft_debug_lineno = 0;
return (FT_Pointer)block;
}
static FT_MemSource
ft_mem_table_get_source( FT_MemTable table )
{
FT_UInt32 hash;
FT_MemSource node, *pnode;
/* cast to FT_PtrDist first since void* can be larger */
/* than FT_UInt32 and GCC 4.1.1 emits a warning */
hash = (FT_UInt32)(FT_PtrDist)(void*)_ft_debug_file +
(FT_UInt32)( 5 * _ft_debug_lineno );
pnode = &table->sources[hash % FT_MEM_SOURCE_BUCKETS];
for ( ;; )
{
node = *pnode;
if ( node == NULL )
break;
if ( node->file_name == _ft_debug_file &&
node->line_no == _ft_debug_lineno )
goto Exit;
pnode = &node->link;
}
node = (FT_MemSource)ft_mem_table_alloc( table, sizeof ( *node ) );
if ( node == NULL )
ft_mem_debug_panic(
"not enough memory to perform memory debugging\n" );
node->file_name = _ft_debug_file;
node->line_no = _ft_debug_lineno;
node->cur_blocks = 0;
node->max_blocks = 0;
node->all_blocks = 0;
node->cur_size = 0;
node->max_size = 0;
node->all_size = 0;
node->cur_max = 0;
node->link = NULL;
node->hash = hash;
*pnode = node;
Exit:
return node;
}
static void
ft_mem_table_remove( FT_MemTable table,
FT_Byte* address )
{
if ( table )
{
FT_MemNode *pnode, node;
pnode = ft_mem_table_get_nodep( table, address );
node = *pnode;
if ( node )
{
if ( node->size < 0 )
ft_mem_debug_panic(
"freeing memory block at %p more than once at (%s:%ld)\n"
"block allocated at (%s:%ld) and released at (%s:%ld)",
address,
FT_FILENAME( table->file_name ), table->line_no,
FT_FILENAME( node->alloc_file_name ), node->alloc_line_no,
FT_FILENAME( node->free_file_name ), node->free_line_no );
/* we simply invert the node's size to indicate that the node */
/* was freed. We also change its contents. */
FT_MEM_SET( address, 0xF3, node->size );
table->alloc_current -= node->size;
node->size = -node->size;
node->free_file_name = table->file_name;
node->free_line_no = table->line_no;
}
else
ft_mem_debug_panic(
"trying to free unknown block at %p in (%s:%ld)\n",
address,
FT_FILENAME( table->file_name ), table->line_no );
}
}
static FT_MemSource
ft_mem_table_get_source( FT_MemTable table )
{
FT_UInt32 hash;
FT_MemSource node, *pnode;
hash = (FT_UInt32)(void*)table->file_name +
(FT_UInt32)( 5 * table->line_no );
pnode = &table->sources[hash % FT_MEM_SOURCE_BUCKETS];
for ( ;; )
{
node = *pnode;
if ( node == NULL )
break;
if ( node->file_name == table->file_name &&
node->line_no == table->line_no )
goto Exit;
pnode = &node->link;
}
node = (FT_MemSource)ft_mem_table_alloc( table, sizeof ( *node ) );
if ( node == NULL )
ft_mem_debug_panic(
"not enough memory to perform memory debugging\n" );
node->file_name = table->file_name;
node->line_no = table->line_no;
node->cur_blocks = 0;
node->max_blocks = 0;
node->all_blocks = 0;
node->cur_size = 0;
node->max_size = 0;
node->all_size = 0;
node->cur_max = 0;
node->link = NULL;
node->hash = hash;
*pnode = node;
Exit:
return node;
}
extern void
ft_mem_debug_free( FT_Memory memory,
FT_Pointer block )
{
FT_MemTable table = (FT_MemTable)memory->user;
if ( block == NULL )
ft_mem_debug_panic( "trying to free NULL in (%s:%ld)",
FT_FILENAME( table->file_name ),
table->line_no );
ft_mem_table_remove( table, (FT_Byte*)block );
/* we never really free the block */
table->file_name = NULL;
table->line_no = 0;
}
extern FT_Pointer
ft_mem_debug_alloc( FT_Memory memory,
FT_Long size )
{
FT_MemTable table = (FT_MemTable)memory->user;
FT_Byte* block;
if ( size <= 0 )
ft_mem_debug_panic( "negative block size allocation (%ld)", size );
block = (FT_Byte *)ft_mem_table_alloc( table, size );
if ( block )
ft_mem_table_set( table, block, (FT_ULong)size );
table->file_name = NULL;
table->line_no = 0;
return (FT_Pointer) block;
}
extern void
ft_mem_debug_free( FT_Memory memory,
FT_Pointer block )
{
FT_MemTable table = (FT_MemTable)memory->user;
if ( block == NULL )
ft_mem_debug_panic( "trying to free NULL in (%s:%ld)",
FT_FILENAME( _ft_debug_file ),
_ft_debug_lineno );
ft_mem_table_remove( table, (FT_Byte*)block, 0 );
if ( !table->keep_alive )
ft_mem_table_free( table, block );
table->alloc_count--;
_ft_debug_file = "<unknown>";
_ft_debug_lineno = 0;
}
static void
ft_mem_table_destroy( FT_MemTable table )
{
FT_ULong i;
if ( table )
{
FT_Long leak_count = 0;
FT_ULong leaks = 0;
for ( i = 0; i < table->size; i++ )
{
FT_MemNode *pnode = table->buckets + i, next, node = *pnode;
while ( node )
{
next = node->link;
node->link = 0;
if ( node->size > 0 )
{
printf(
"leaked memory block at address %p, size %8ld in (%s:%ld)\n",
node->address, node->size,
FT_FILENAME( node->alloc_file_name ),
node->alloc_line_no );
leak_count++;
leaks += node->size;
ft_mem_table_free( table, node->address );
}
node->address = NULL;
node->size = 0;
free( node );
node = next;
}
table->buckets[i] = 0;
}
ft_mem_table_free( table, table->buckets );
table->buckets = NULL;
table->size = 0;
table->nodes = 0;
printf(
"FreeType: total memory allocations = %ld\n", table->alloc_total );
printf(
"FreeType: maximum memory footprint = %ld\n", table->alloc_max );
free( table );
if ( leak_count > 0 )
ft_mem_debug_panic(
"FreeType: %ld bytes of memory leaked in %ld blocks\n",
leaks, leak_count );
printf( "FreeType: No memory leaks detected!\n" );
}
}
extern FT_Pointer
ft_mem_debug_realloc( FT_Memory memory,
FT_Long cur_size,
FT_Long new_size,
FT_Pointer block )
{
FT_MemTable table = (FT_MemTable)memory->user;
FT_MemNode node, *pnode;
FT_Pointer new_block;
FT_Long delta;
const char* file_name = FT_FILENAME( _ft_debug_file );
FT_Long line_no = _ft_debug_lineno;
/* unlikely, but possible */
if ( new_size == cur_size )
return block;
/* the following is valid according to ANSI C */
#if 0
if ( block == NULL || cur_size == 0 )
ft_mem_debug_panic( "trying to reallocate NULL in (%s:%ld)",
file_name, line_no );
#endif
/* while the following is allowed in ANSI C also, we abort since */
/* such case should be handled by FreeType. */
if ( new_size <= 0 )
ft_mem_debug_panic(
"trying to reallocate %p to size 0 (current is %ld) in (%s:%ld)",
block, cur_size, file_name, line_no );
/* check `cur_size' value */
pnode = ft_mem_table_get_nodep( table, (FT_Byte*)block );
node = *pnode;
if ( !node )
ft_mem_debug_panic(
"trying to reallocate unknown block at %p in (%s:%ld)",
block, file_name, line_no );
if ( node->size <= 0 )
ft_mem_debug_panic(
"trying to reallocate freed block at %p in (%s:%ld)",
block, file_name, line_no );
if ( node->size != cur_size )
ft_mem_debug_panic( "invalid ft_realloc request for %p. cur_size is "
"%ld instead of %ld in (%s:%ld)",
block, cur_size, node->size, file_name, line_no );
/* return NULL if the maximum number of allocations was reached */
if ( table->bound_count &&
table->alloc_count >= table->alloc_count_max )
return NULL;
delta = (FT_Long)( new_size - cur_size );
/* return NULL if this allocation would overflow the maximum heap size */
if ( delta > 0 &&
table->bound_total &&
table->alloc_current + (FT_ULong)delta > table->alloc_total_max )
return NULL;
new_block = (FT_Byte *)ft_mem_table_alloc( table, new_size );
if ( new_block == NULL )
return NULL;
ft_mem_table_set( table, (FT_Byte*)new_block, new_size, delta );
ft_memcpy( new_block, block, cur_size < new_size ? cur_size : new_size );
ft_mem_table_remove( table, (FT_Byte*)block, delta );
_ft_debug_file = "<unknown>";
_ft_debug_lineno = 0;
if ( !table->keep_alive )
ft_mem_table_free( table, block );
return new_block;
}
static void
ft_mem_table_remove( FT_MemTable table,
FT_Byte* address,
FT_Long delta )
{
if ( table )
{
FT_MemNode *pnode, node;
pnode = ft_mem_table_get_nodep( table, address );
node = *pnode;
if ( node )
{
FT_MemSource source;
if ( node->size < 0 )
ft_mem_debug_panic(
"freeing memory block at %p more than once at (%s:%ld)\n"
"block allocated at (%s:%ld) and released at (%s:%ld)",
address,
FT_FILENAME( _ft_debug_file ), _ft_debug_lineno,
FT_FILENAME( node->source->file_name ), node->source->line_no,
FT_FILENAME( node->free_file_name ), node->free_line_no );
/* scramble the node's content for additional safety */
FT_MEM_SET( address, 0xF3, node->size );
if ( delta == 0 )
{
source = node->source;
source->cur_blocks--;
source->cur_size -= node->size;
table->alloc_current -= node->size;
}
if ( table->keep_alive )
{
/* we simply invert the node's size to indicate that the node */
/* was freed. */
node->size = -node->size;
node->free_file_name = _ft_debug_file;
node->free_line_no = _ft_debug_lineno;
}
else
{
table->nodes--;
*pnode = node->link;
node->size = 0;
node->source = NULL;
ft_mem_table_free( table, node );
if ( table->nodes * 3 < table->size ||
table->size * 3 < table->nodes )
ft_mem_table_resize( table );
}
}
else
ft_mem_debug_panic(
"trying to free unknown block at %p in (%s:%ld)\n",
address,
FT_FILENAME( _ft_debug_file ), _ft_debug_lineno );
}
}
static void
ft_mem_table_set( FT_MemTable table,
FT_Byte* address,
FT_ULong size,
FT_Long delta )
{
FT_MemNode *pnode, node;
if ( table )
{
FT_MemSource source;
pnode = ft_mem_table_get_nodep( table, address );
node = *pnode;
if ( node )
{
if ( node->size < 0 )
{
/* This block was already freed. Our memory is now completely */
/* corrupted! */
/* This can only happen in keep-alive mode. */
ft_mem_debug_panic(
"memory heap corrupted (allocating freed block)" );
}
else
{
/* This block was already allocated. This means that our memory */
/* is also corrupted! */
ft_mem_debug_panic(
"memory heap corrupted (re-allocating allocated block at"
" %p, of size %ld)\n"
"org=%s:%d new=%s:%d\n",
node->address, node->size,
FT_FILENAME( node->source->file_name ), node->source->line_no,
FT_FILENAME( _ft_debug_file ), _ft_debug_lineno );
}
}
/* we need to create a new node in this table */
node = (FT_MemNode)ft_mem_table_alloc( table, sizeof ( *node ) );
if ( node == NULL )
ft_mem_debug_panic( "not enough memory to run memory tests" );
node->address = address;
node->size = size;
node->source = source = ft_mem_table_get_source( table );
if ( delta == 0 )
{
/* this is an allocation */
source->all_blocks++;
source->cur_blocks++;
if ( source->cur_blocks > source->max_blocks )
source->max_blocks = source->cur_blocks;
}
if ( size > (FT_ULong)source->cur_max )
source->cur_max = size;
if ( delta != 0 )
{
/* we are growing or shrinking a reallocated block */
source->cur_size += delta;
table->alloc_current += delta;
}
else
{
/* we are allocating a new block */
source->cur_size += size;
table->alloc_current += size;
}
source->all_size += size;
if ( source->cur_size > source->max_size )
source->max_size = source->cur_size;
node->free_file_name = NULL;
node->free_line_no = 0;
node->link = pnode[0];
pnode[0] = node;
table->nodes++;
table->alloc_total += size;
if ( table->alloc_current > table->alloc_max )
table->alloc_max = table->alloc_current;
if ( table->nodes * 3 < table->size ||
table->size * 3 < table->nodes )
ft_mem_table_resize( table );
}
}
static void
ft_mem_table_destroy( FT_MemTable table )
{
FT_ULong i;
FT_DumpMemory( table->memory );
if ( table )
{
FT_Long leak_count = 0;
FT_ULong leaks = 0;
/* remove all blocks from the table, revealing leaked ones */
for ( i = 0; i < table->size; i++ )
{
FT_MemNode *pnode = table->buckets + i, next, node = *pnode;
while ( node )
{
next = node->link;
node->link = 0;
if ( node->size > 0 )
{
FT_PRINTF(
"leaked memory block at address %p, size %8ld in (%s:%ld)\n",
node->address, node->size,
FT_FILENAME( node->source->file_name ),
node->source->line_no );
leak_count++;
leaks += node->size;
ft_mem_table_free( table, node->address );
}
node->address = NULL;
node->size = 0;
ft_mem_table_free( table, node );
node = next;
}
table->buckets[i] = 0;
}
ft_mem_table_free( table, table->buckets );
table->buckets = NULL;
table->size = 0;
table->nodes = 0;
/* remove all sources */
for ( i = 0; i < FT_MEM_SOURCE_BUCKETS; i++ )
{
FT_MemSource source, next;
for ( source = table->sources[i]; source != NULL; source = next )
{
next = source->link;
ft_mem_table_free( table, source );
}
table->sources[i] = NULL;
}
FT_PRINTF(
"FreeType: total memory allocations = %ld\n", table->alloc_total );
FT_PRINTF(
"FreeType: maximum memory footprint = %ld\n", table->alloc_max );
ft_mem_table_free( table, table );
if ( leak_count > 0 )
ft_mem_debug_panic(
"FreeType: %ld bytes of memory leaked in %ld blocks\n",
leaks, leak_count );
FT_PRINTF( "FreeType: No memory leaks detected!\n" );
}
}