Disable -lmcheck when Python has threads (Re: [BUG] gdb crash when "python import gtk")

[Khoo Yit Phang]

Hi,

On Aug 30, 2012, at 12:04 PM, Jan Kratochvil wrote:

> Hi,
> 
> On Thu, 30 Aug 2012 18:00:46 +0200, Khoo Yit Phang wrote:
>> I ran into a similar issue as below and tracked it down: the "memory
>> clobbered before allocated block" (and other related messages) because
>> -lmcheck is not thread safe, and triggers spuriously when threads are used
>> in Python (e.g., the "gtk" module).
> 
> this needs some references to glibc/gtk/python maintainers statements etc.
> 
> -lmcheck is AFAIK thread safe in glibc itself.

-lmcheck is definitely not thread safe, at least as of glibc 2.13 (Ubuntu 11.04). See the first answer of http://stackoverflow.com/questions/314931/glibcs-lmcheck-option-and-multithreading.

Yit
August 30, 2012