source: rtems/cpukit/libcsupport/src/free.c @ de9b7d7

5
Last change on this file since de9b7d7 was de9b7d7, checked in by Sebastian Huber <sebastian.huber@…>, on 06/01/18 at 05:04:45

Add RTEMS_FATAL_SOURCE_INVALID_HEAP_FREE

An invalid heap usage such as a double free is usually a fatal error
since this indicates a use after free. Replace the use of printk() in
free() with a fatal error.

Update #3437.

  • Property mode set to 100644
File size: 829 bytes
Line 
1/**
2 * @file
3 *
4 * @brief calloc()
5 * @ingroup libcsupport
6 */
7
8/*
9 *  COPYRIGHT (c) 1989-2007.
10 *  On-Line Applications Research Corporation (OAR).
11 *
12 *  The license and distribution terms for this file may be
13 *  found in the file LICENSE in this distribution or at
14 *  http://www.rtems.org/license/LICENSE.
15 */
16
17#if HAVE_CONFIG_H
18#include "config.h"
19#endif
20
21#ifdef RTEMS_NEWLIB
22#include "malloc_p.h"
23#include <stdlib.h>
24
25void free(
26  void *ptr
27)
28{
29  if ( !ptr )
30    return;
31
32  /*
33   *  Do not attempt to free memory if in a critical section or ISR.
34   */
35  if ( _Malloc_System_state() != MALLOC_SYSTEM_STATE_NORMAL ) {
36      _Malloc_Deferred_free(ptr);
37      return;
38  }
39
40  if ( !_Protected_heap_Free( RTEMS_Malloc_Heap, ptr ) ) {
41    rtems_fatal( RTEMS_FATAL_SOURCE_INVALID_HEAP_FREE, (rtems_fatal_code) ptr );
42  }
43}
44#endif
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