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xfun68 / gperftools

Automatically exported from code.google.com/p/gperftools
BSD 3-Clause "New" or "Revised" License
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Tcmalloc crashes when process adds an mmap block close to the top of the heap #688

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 
I consistently see this random crash. My app does mmap with randomized pointer 
value. I narrowed down the cause of the crash to the memory range of 
0x01000000-0x05000000. When mmap is called in the middle of the process 
allocating few megabytes from this address range, crash follows soon on some 
other allocation of ~32kb. Mmap for this specific address 0x43f0000 makes crash 
repeatable. Crash occurs in src/thread_cache.h on invalid pointer list_ (it 
doesn't point to the accessible memory).

TCMALLOC_SKIP_SBRK=1 eliminates the crash.

It is of course possible that my app that causes some memory corruption. But 
there are no other indications of anything strange going on, application works 
long term, memory goes up to 10GB and down to 500MB, and never crashes.

Original issue reported on code.google.com by yuriv...@gmail.com on 11 May 2015 at 10:26

GoogleCodeExporter commented 9 years ago 
In order to make any further progress on this we'll need at least some evidence.

Ideally, small program the reproduces the crash.

Right now, unfortunately, there is not enough information for me to help.

Original comment by alkondratenko on 17 May 2015 at 6:57