Re: [Valgrind-users] invalid free() from static destructor on exit()

[Ivo R. <iv...@iv...>]

2017-03-08 11:56 GMT+01:00 Julian Seward <js...@ac...>:
> On 08/03/17 07:16, A. Lester Buck III wrote:
>> I don't understand the last line:
>>
>> Address 0xf95f6a0 is in the BSS segment of /usr/local/lib/libaws-cpp-\
>> sdk-core.so
>
> What this means is, the address that has been passed to free -- that is,
> 0xf95f6a0 -- is zero-initialised data in libaws-cpp-sdk-core.so and so
> has not been allocated on the heap.  It's (the address of) a global
> variable in libaws-cpp-sdk-core.so, in other words.
>
>> How do I use this to figure out where/why the free() error is happening?
>
> You can poke around more with GDB by rerunning the program on V with
> --vgdb-error=0 and following the directions it gives.  GDB will stop at
> the error (at all errors) and you can examine the program state at your
> leisure.

If this is your first time debugging a program under gdb,
you might want to read this manual section:
http://valgrind.org/docs/manual/manual-core-adv.html#manual-core-adv.gdbserver

I.