kenmirrors/asterisk
1
0
Fork 0
mirror of https://github.com/asterisk/asterisk.git synced 2025-10-20 19:53:10 +00:00
Code Issues Packages Projects Releases Wiki Activity

Add MALLOC_DEBUG enhancements.

Browse Source 
* Makes malloc() behave like calloc().  It will return a memory block
filled with 0x55.  A nonzero value.

* Makes free() fill the released memory block and boundary fence's with
0xdeaddead.  Any pointer use after free is going to have a pointer
pointing to 0xdeaddead.  The 0xdeaddead pointer is usually an invalid
memory address so a crash is expected.

* Puts the freed memory block into a circular array so it is not reused
immediately.

* When the circular array rotates out a memory block to the heap it checks
that the memory has not been altered from 0xdeaddead.

* Made the astmm_log message wording better.

* Made crash if the DO_CRASH menuselect option is enabled and something is
found.

* Fixed a potential alignment issue on 64 bit systems.
struct ast_region.data[] should now be aligned correctly for all
platforms.

* Extracted region_check_fences() from __ast_free_region() and
handle_memory_show().

* Updated handle_memory_show() CLI usage help.

Review: https://reviewboard.asterisk.org/r/2182/
........

Merged revisions 376029 from http://svn.asterisk.org/svn/asterisk/branches/1.8
........

Merged revisions 376030 from http://svn.asterisk.org/svn/asterisk/branches/10
........

Merged revisions 376048 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@376049 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Richard Mudgett
2012-11-08 17:38:31 +00:00
parent f2bb9afe17
commit 3a9640b605
5 changed files with 456 additions and 133 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
main/utils.c
View File

@@ -2219,3 +2219,35 @@ char *ast_utils_which(const char *binary, char *fullpath, size_t fullpath_size)
return NULL;
}
void ast_do_crash(void)
{
#if defined(DO_CRASH)
abort();
/*
* Just in case abort() doesn't work or something else super
* silly, and for Qwell's amusement.
*/
*((int *) 0) = 0;
#endif /* defined(DO_CRASH) */
}
#if defined(AST_DEVMODE)
void __ast_assert_failed(int condition, const char *condition_str, const char *file, int line, const char *function)
{
/*
* Attempt to put it into the logger, but hope that at least
* someone saw the message on stderr ...
*/
ast_log(__LOG_ERROR, file, line, function, "FRACK!, Failed assertion %s (%d)\n",
condition_str, condition);
fprintf(stderr, "FRACK!, Failed assertion %s (%d) at line %d in %s of %s\n",
condition_str, condition, line, function, file);
/*
* Give the logger a chance to get the message out, just in case
* we abort(), or Asterisk crashes due to whatever problem just
* happened after we exit ast_assert().
*/
usleep(1);
ast_do_crash();
}
#endif /* defined(AST_DEVMODE) */