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Diffstat (limited to 'manual/probes.texi')
| -rw-r--r-- | manual/probes.texi | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/manual/probes.texi b/manual/probes.texi index ab2a3102bb..0ea560ed78 100644 --- a/manual/probes.texi +++ b/manual/probes.texi @@ -243,6 +243,18 @@ This probe is triggered when the value of this tunable. @end deftp +@deftp Probe memory_tcache_double_free (void *@var{$arg1}, int @var{$arg2}) +This probe is triggered when @code{free} determines that the memory +being freed has probably already been freed, and resides in the +per-thread cache. Note that there is an extremely unlikely chance +that this probe will trigger due to random payload data remaining in +the allocated memory matching the key used to detect double frees. +This probe actually indicates that an expensive linear search of the +tcache, looking for a double free, has happened. Argument @var{$arg1} +is the memory location as passed to @code{free}, Argument @var{$arg2} +is the tcache bin it resides in. +@end deftp + @node Mathematical Function Probes @section Mathematical Function Probes |