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Add catch-all alloc retry probe.

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	* malloc/arena.c (arena_get_retry): Add memory_arena_retry probe.
	* manual/probes.texi: Document it.
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Alexandre Oliva 2013-09-20 11:10:56 -03:00
parent 35fed6f15d
commit 655673f312
3 changed files with 16 additions and 0 deletions
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3
ChangeLog
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@ -1,5 +1,8 @@
2013-09-20 Alexandre Oliva <aoliva@redhat.com> 2013-09-20 Alexandre Oliva <aoliva@redhat.com>
* malloc/arena.c (arena_get_retry): Add memory_arena_retry probe.
* manual/probes.texi: Document it.
* malloc/malloc.c (__libc_malloc): Add memory_malloc_retry probe. * malloc/malloc.c (__libc_malloc): Add memory_malloc_retry probe.
(__libc_realloc): Add memory_realloc_retry probe. (__libc_realloc): Add memory_realloc_retry probe.
(__libc_memalign): Add memory_memalign_retry probe. (__libc_memalign): Add memory_memalign_retry probe.

1
malloc/arena.c
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@ -932,6 +932,7 @@ arena_get2(mstate a_tsd, size_t size, mstate avoid_arena)
static mstate static mstate
arena_get_retry (mstate ar_ptr, size_t bytes) arena_get_retry (mstate ar_ptr, size_t bytes)
{ {
LIBC_PROBE (memory_arena_retry, 2, bytes, ar_ptr);
if(ar_ptr != &main_arena) { if(ar_ptr != &main_arena) {
(void)mutex_unlock(&ar_ptr->mutex); (void)mutex_unlock(&ar_ptr->mutex);
ar_ptr = &main_arena; ar_ptr = &main_arena;

12
manual/probes.texi
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@ -48,6 +48,18 @@ corresponding two-argument functions, so that in all of these probes the
user-requested allocation size is in @var{$arg1}. user-requested allocation size is in @var{$arg1}.
@end deftp @end deftp
@deftp Probe memory_arena_retry (size_t @var{$arg1}, void *@var{$arg2})
This probe is triggered within @code{arena_get_retry} (the function
called to select the alternate arena in which to retry an allocation
that failed on the first attempt), before the selection of an alternate
arena. This probe is redundant, but much easier to use when it's not
important to determine which of the various memory allocation functions
is failing to allocate on the first try. Argument @var{$arg1} is the
same as in the function-specific probes, except for extra room for
padding introduced by functions that have to ensure stricter alignment.
Argument @var{$arg2} is the arena in which allocation failed.
@end deftp
@deftp Probe memory_arena_new (void *@var{$arg1}, size_t @var{$arg2}) @deftp Probe memory_arena_new (void *@var{$arg1}, size_t @var{$arg2})
This probe is triggered when @code{malloc} allocates and initializes an This probe is triggered when @code{malloc} allocates and initializes an
additional arena (not the main arena), but before the arena is assigned additional arena (not the main arena), but before the arena is assigned