kc3-lang/freetype/src/base/ftdbgmem.c

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• Hash : 0fcf486e
  Author :
  Date : 2019-10-06T21:12:42
  

  Improve memory debugging. * include/freetype/internal/ftmemory.h (FT_MEM_FREE): Use `FT_DEBUG_INNER' to set source code file name and line. * src/base/ftdbgmem.c (ft_mem_table_remove): Better formatting of tracing message.

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• src/base/ftdbgmem.c

• /****************************************************************************
   *
   * ftdbgmem.c
   *
   *   Memory debugger (body).
   *
   * Copyright (C) 2001-2019 by
   * David Turner, Robert Wilhelm, and Werner Lemberg.
   *
   * This file is part of the FreeType project, and may only be used,
   * modified, and distributed under the terms of the FreeType project
   * license, LICENSE.TXT.  By continuing to use, modify, or distribute
   * this file you indicate that you have read the license and
   * understand and accept it fully.
   *
   */
  
  
  #include <ft2build.h>
  #include FT_CONFIG_CONFIG_H
  #include FT_INTERNAL_DEBUG_H
  #include FT_INTERNAL_MEMORY_H
  #include FT_SYSTEM_H
  #include FT_ERRORS_H
  #include FT_TYPES_H
  
  
  #ifdef FT_DEBUG_MEMORY
  
  #define  KEEPALIVE /* `Keep alive' means that freed blocks aren't released
                      * to the heap.  This is useful to detect double-frees
                      * or weird heap corruption, but it uses large amounts of
                      * memory, however.
                      */
  
  #include FT_CONFIG_STANDARD_LIBRARY_H
  
    FT_BASE_DEF( const char* )  _ft_debug_file   = NULL;
    FT_BASE_DEF( long )         _ft_debug_lineno = 0;
  
    extern void
    FT_DumpMemory( FT_Memory  memory );
  
  
    typedef struct FT_MemSourceRec_*  FT_MemSource;
    typedef struct FT_MemNodeRec_*    FT_MemNode;
    typedef struct FT_MemTableRec_*   FT_MemTable;
  
  
  #define FT_MEM_VAL( addr )  ( (FT_PtrDist)(FT_Pointer)( addr ) )
  
    /*
     * This structure holds statistics for a single allocation/release
     * site.  This is useful to know where memory operations happen the
     * most.
     */
    typedef struct  FT_MemSourceRec_
    {
      const char*   file_name;
      long          line_no;
  
      FT_Long       cur_blocks;   /* current number of allocated blocks */
      FT_Long       max_blocks;   /* max. number of allocated blocks    */
      FT_Long       all_blocks;   /* total number of blocks allocated   */
  
      FT_Long       cur_size;     /* current cumulative allocated size */
      FT_Long       max_size;     /* maximum cumulative allocated size */
      FT_Long       all_size;     /* total cumulative allocated size   */
  
      FT_Long       cur_max;      /* current maximum allocated size */
  
      FT_UInt32     hash;
      FT_MemSource  link;
  
    } FT_MemSourceRec;
  
  
    /*
     * We don't need a resizable array for the memory sources because
     * their number is pretty limited within FreeType.
     */
  #define FT_MEM_SOURCE_BUCKETS  128
  
    /*
     * This structure holds information related to a single allocated
     * memory block.  If KEEPALIVE is defined, blocks that are freed by
     * FreeType are never released to the system.  Instead, their `size'
     * field is set to `-size'.  This is mainly useful to detect double
     * frees, at the price of a large memory footprint during execution.
     */
    typedef struct  FT_MemNodeRec_
    {
      FT_Byte*      address;
      FT_Long       size;     /* < 0 if the block was freed */
  
      FT_MemSource  source;
  
  #ifdef KEEPALIVE
      const char*   free_file_name;
      FT_Long       free_line_no;
  #endif
  
      FT_MemNode    link;
  
    } FT_MemNodeRec;
  
  
    /*
     * The global structure, containing compound statistics and all hash
     * tables.
     */
    typedef struct  FT_MemTableRec_
    {
      FT_Long          size;
      FT_Long          nodes;
      FT_MemNode*      buckets;
  
      FT_Long          alloc_total;
      FT_Long          alloc_current;
      FT_Long          alloc_max;
      FT_Long          alloc_count;
  
      FT_Bool          bound_total;
      FT_Long          alloc_total_max;
  
      FT_Bool          bound_count;
      FT_Long          alloc_count_max;
  
      FT_MemSource     sources[FT_MEM_SOURCE_BUCKETS];
  
      FT_Bool          keep_alive;
  
      FT_Memory        memory;
      FT_Pointer       memory_user;
      FT_Alloc_Func    alloc;
      FT_Free_Func     free;
      FT_Realloc_Func  realloc;
  
    } FT_MemTableRec;
  
  
  #define FT_MEM_SIZE_MIN  7
  #define FT_MEM_SIZE_MAX  13845163
  
  #define FT_FILENAME( x )  ( (x) ? (x) : "unknown file" )
  
  
    /*
     * Prime numbers are ugly to handle.  It would be better to implement
     * L-Hashing, which is 10% faster and doesn't require divisions.
     */
    static const FT_Int  ft_mem_primes[] =
    {
      7,
      11,
      19,
      37,
      73,
      109,
      163,
      251,
      367,
      557,
      823,
      1237,
      1861,
      2777,
      4177,
      6247,
      9371,
      14057,
      21089,
      31627,
      47431,
      71143,
      106721,
      160073,
      240101,
      360163,
      540217,
      810343,
      1215497,
      1823231,
      2734867,
      4102283,
      6153409,
      9230113,
      13845163,
    };
  
  
    static FT_Long
    ft_mem_closest_prime( FT_Long  num )
    {
      size_t  i;
  
  
      for ( i = 0;
            i < sizeof ( ft_mem_primes ) / sizeof ( ft_mem_primes[0] ); i++ )
        if ( ft_mem_primes[i] > num )
          return ft_mem_primes[i];
  
      return FT_MEM_SIZE_MAX;
    }
  
  
    static void
    ft_mem_debug_panic( const char*  fmt,
                        ... )
    {
      va_list  ap;
  
  
      printf( "FreeType.Debug: " );
  
      va_start( ap, fmt );
      vprintf( fmt, ap );
      va_end( ap );
  
      printf( "\n" );
      exit( EXIT_FAILURE );
    }
  
  
    static FT_Pointer
    ft_mem_table_alloc( FT_MemTable  table,
                        FT_Long      size )
    {
      FT_Memory   memory = table->memory;
      FT_Pointer  block;
  
  
      memory->user = table->memory_user;
      block = table->alloc( memory, size );
      memory->user = table;
  
      return block;
    }
  
  
    static void
    ft_mem_table_free( FT_MemTable  table,
                       FT_Pointer   block )
    {
      FT_Memory  memory = table->memory;
  
  
      memory->user = table->memory_user;
      table->free( memory, block );
      memory->user = table;
    }
  
  
    static void
    ft_mem_table_resize( FT_MemTable  table )
    {
      FT_Long  new_size;
  
  
      new_size = ft_mem_closest_prime( table->nodes );
      if ( new_size != table->size )
      {
        FT_MemNode*  new_buckets;
        FT_Long      i;
  
  
        new_buckets = (FT_MemNode *)
                        ft_mem_table_alloc(
                          table,
                          new_size * (FT_Long)sizeof ( FT_MemNode ) );
        if ( !new_buckets )
          return;
  
        FT_ARRAY_ZERO( new_buckets, new_size );
  
        for ( i = 0; i < table->size; i++ )
        {
          FT_MemNode  node, next, *pnode;
          FT_PtrDist  hash;
  
  
          node = table->buckets[i];
          while ( node )
          {
            next  = node->link;
            hash  = FT_MEM_VAL( node->address ) % (FT_PtrDist)new_size;
            pnode = new_buckets + hash;
  
            node->link = pnode[0];
            pnode[0]   = node;
  
            node = next;
          }
        }
  
        if ( table->buckets )
          ft_mem_table_free( table, table->buckets );
  
        table->buckets = new_buckets;
        table->size    = new_size;
      }
    }
  
  
    static FT_MemTable
    ft_mem_table_new( FT_Memory  memory )
    {
      FT_MemTable  table;
  
  
      table = (FT_MemTable)memory->alloc( memory, sizeof ( *table ) );
      if ( !table )
        goto Exit;
  
      FT_ZERO( table );
  
      table->size  = FT_MEM_SIZE_MIN;
      table->nodes = 0;
  
      table->memory = memory;
  
      table->memory_user = memory->user;
  
      table->alloc   = memory->alloc;
      table->realloc = memory->realloc;
      table->free    = memory->free;
  
      table->buckets = (FT_MemNode *)
                         memory->alloc(
                           memory,
                           table->size * (FT_Long)sizeof ( FT_MemNode ) );
      if ( table->buckets )
        FT_ARRAY_ZERO( table->buckets, table->size );
      else
      {
        memory->free( memory, table );
        table = NULL;
      }
  
    Exit:
      return table;
    }
  
  
    static void
    ft_mem_table_destroy( FT_MemTable  table )
    {
      FT_Long  i;
      FT_Long  leak_count = 0;
      FT_Long  leaks      = 0;
  
  
      FT_DumpMemory( table->memory );
  
      /* 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 = NULL;
  
          if ( node->size > 0 )
          {
            printf(
              "leaked memory block at address %p, size %8ld in (%s:%ld)\n",
              (void*)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] = NULL;
      }
  
      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;
      }
  
      printf( "FreeType: total memory allocations = %ld\n",
              table->alloc_total );
      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 );
  
      printf( "FreeType: no memory leaks detected\n" );
    }
  
  
    static FT_MemNode*
    ft_mem_table_get_nodep( FT_MemTable  table,
                            FT_Byte*     address )
    {
      FT_PtrDist   hash;
      FT_MemNode  *pnode, node;
  
  
      hash  = FT_MEM_VAL( address );
      pnode = table->buckets + ( hash % (FT_PtrDist)table->size );
  
      for (;;)
      {
        node = pnode[0];
        if ( !node )
          break;
  
        if ( node->address == address )
          break;
  
        pnode = &node->link;
      }
      return pnode;
    }
  
  
    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 )
          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 )
        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_set( FT_MemTable  table,
                      FT_Byte*     address,
                      FT_Long      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 )
          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 > 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_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\n"
              "  at (%s:%ld)!\n"
              "  Block was allocated at (%s:%ld)\n"
              "  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 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 void
    ft_mem_debug_free( FT_Memory   memory,
                       FT_Pointer  block )
    {
      FT_MemTable  table = (FT_MemTable)memory->user;
  
  
      if ( !block )
        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 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 || !cur_size )
        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 = new_size - cur_size;
  
      /* return NULL if this allocation would overflow the maximum heap size */
      if ( delta > 0                                             &&
           table->bound_total                                    &&
           table->alloc_current + delta > table->alloc_total_max )
        return NULL;
  
      new_block = (FT_Pointer)ft_mem_table_alloc( table, new_size );
      if ( !new_block )
        return NULL;
  
      ft_mem_table_set( table, (FT_Byte*)new_block, new_size, delta );
  
      ft_memcpy( new_block, block, cur_size < new_size ? (size_t)cur_size
                                                       : (size_t)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;
    }
  
  
    extern FT_Int
    ft_mem_debug_init( FT_Memory  memory )
    {
      FT_MemTable  table;
      FT_Int       result = 0;
  
  
      if ( ft_getenv( "FT2_DEBUG_MEMORY" ) )
      {
        table = ft_mem_table_new( memory );
        if ( table )
        {
          const char*  p;
  
  
          memory->user    = table;
          memory->alloc   = ft_mem_debug_alloc;
          memory->realloc = ft_mem_debug_realloc;
          memory->free    = ft_mem_debug_free;
  
          p = ft_getenv( "FT2_ALLOC_TOTAL_MAX" );
          if ( p )
          {
            FT_Long  total_max = ft_strtol( p, NULL, 10 );
  
  
            if ( total_max > 0 )
            {
              table->bound_total     = 1;
              table->alloc_total_max = total_max;
            }
          }
  
          p = ft_getenv( "FT2_ALLOC_COUNT_MAX" );
          if ( p )
          {
            FT_Long  total_count = ft_strtol( p, NULL, 10 );
  
  
            if ( total_count > 0 )
            {
              table->bound_count     = 1;
              table->alloc_count_max = total_count;
            }
          }
  
          p = ft_getenv( "FT2_KEEP_ALIVE" );
          if ( p )
          {
            FT_Long  keep_alive = ft_strtol( p, NULL, 10 );
  
  
            if ( keep_alive > 0 )
              table->keep_alive = 1;
          }
  
          result = 1;
        }
      }
      return result;
    }
  
  
    extern void
    ft_mem_debug_done( FT_Memory  memory )
    {
      FT_MemTable  table = (FT_MemTable)memory->user;
  
  
      if ( table )
      {
        memory->free    = table->free;
        memory->realloc = table->realloc;
        memory->alloc   = table->alloc;
  
        ft_mem_table_destroy( table );
        memory->user = NULL;
      }
    }
  
  
    static int
    ft_mem_source_compare( const void*  p1,
                           const void*  p2 )
    {
      FT_MemSource  s1 = *(FT_MemSource*)p1;
      FT_MemSource  s2 = *(FT_MemSource*)p2;
  
  
      if ( s2->max_size > s1->max_size )
        return 1;
      else if ( s2->max_size < s1->max_size )
        return -1;
      else
        return 0;
    }
  
  
    extern void
    FT_DumpMemory( FT_Memory  memory )
    {
      FT_MemTable  table = (FT_MemTable)memory->user;
  
  
      if ( table )
      {
        FT_MemSource*  bucket = table->sources;
        FT_MemSource*  limit  = bucket + FT_MEM_SOURCE_BUCKETS;
        FT_MemSource*  sources;
        FT_Int         nn, count;
        const char*    fmt;
  
  
        count = 0;
        for ( ; bucket < limit; bucket++ )
        {
          FT_MemSource  source = *bucket;
  
  
          for ( ; source; source = source->link )
            count++;
        }
  
        sources = (FT_MemSource*)
                    ft_mem_table_alloc(
                      table, count * (FT_Long)sizeof ( *sources ) );
  
        count = 0;
        for ( bucket = table->sources; bucket < limit; bucket++ )
        {
          FT_MemSource  source = *bucket;
  
  
          for ( ; source; source = source->link )
            sources[count++] = source;
        }
  
        ft_qsort( sources,
                  (size_t)count,
                  sizeof ( *sources ),
                  ft_mem_source_compare );
  
        printf( "FreeType Memory Dump: "
                "current=%ld max=%ld total=%ld count=%ld\n",
                table->alloc_current, table->alloc_max,
                table->alloc_total, table->alloc_count );
        printf( " block  block    sizes    sizes    sizes   source\n" );
        printf( " count   high      sum  highsum      max   location\n" );
        printf( "-------------------------------------------------\n" );
  
        fmt = "%6ld %6ld %8ld %8ld %8ld %s:%d\n";
  
        for ( nn = 0; nn < count; nn++ )
        {
          FT_MemSource  source = sources[nn];
  
  
          printf( fmt,
                  source->cur_blocks, source->max_blocks,
                  source->cur_size, source->max_size, source->cur_max,
                  FT_FILENAME( source->file_name ),
                  source->line_no );
        }
        printf( "------------------------------------------------\n" );
  
        ft_mem_table_free( table, sources );
      }
    }
  
  #else  /* !FT_DEBUG_MEMORY */
  
    /* ANSI C doesn't like empty source files */
    typedef int  _debug_mem_dummy;
  
  #endif /* !FT_DEBUG_MEMORY */
  
  
  /* END */
  

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