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Fix prof_{malloc,free}_sample_object() call order in prof_realloc().

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Fix prof_realloc() to call prof_free_sampled_object() after calling
prof_malloc_sample_object().  Prior to this fix, if tctx and old_tctx
were the same, the tctx could have been prematurely destroyed.
This commit is contained in:
Jason Evans 2015-09-14 23:44:37 -07:00
parent 23f6e103c8
commit ea8d97b897
2 changed files with 11 additions and 3 deletions
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3
ChangeLog
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@ -35,6 +35,9 @@ brevity. Much more detail can be found in the git revision history:
allocation events against concurrent prof_active changes.
- Fix ixallocx_prof() to pass usize_max and zero to ixallocx_prof_sample() in
the correct order.
- Fix prof_realloc() to call prof_free_sampled_object() after calling
prof_malloc_sample_object(). Prior to this fix, if tctx and old_tctx were
the same, the tctx could have been prematurely destroyed.
* 4.0.0 (August 17, 2015)

11
include/jemalloc/internal/prof.h
View file

@ -483,6 +483,7 @@ JEMALLOC_ALWAYS_INLINE void
prof_realloc(tsd_t *tsd, const void *ptr, size_t usize, prof_tctx_t *tctx,
bool prof_active, bool updated, size_t old_usize, prof_tctx_t *old_tctx)
{
bool sampled, old_sampled;
cassert(config_prof);
assert(ptr != NULL || (uintptr_t)tctx <= (uintptr_t)1U);
@ -501,12 +502,16 @@ prof_realloc(tsd_t *tsd, const void *ptr, size_t usize, prof_tctx_t *tctx,
}
}
if (unlikely((uintptr_t)old_tctx > (uintptr_t)1U))
prof_free_sampled_object(tsd, old_usize, old_tctx);
if (unlikely((uintptr_t)tctx > (uintptr_t)1U))
sampled = ((uintptr_t)tctx > (uintptr_t)1U);
old_sampled = ((uintptr_t)old_tctx > (uintptr_t)1U);
if (unlikely(sampled))
prof_malloc_sample_object(ptr, usize, tctx);
else
prof_tctx_set(ptr, usize, (prof_tctx_t *)(uintptr_t)1U);
if (unlikely(old_sampled))
prof_free_sampled_object(tsd, old_usize, old_tctx);
}
JEMALLOC_ALWAYS_INLINE void