[Valgrind-users] how to proceed when faced with malloc error

[Jed R. <je...@ca...>]

Greetings,

I saw the FAQ about bad memory allocations and it looks I have run into 
this situation. What I'd like to know is what tools should I use next to 
try and understand why this area of code is misbehaving. It could be 
machine specific, I don't see this error on one hundred other systems, 
and my memtest86 run passed. Thank you for your suggestions.

Jed

*valgrind --leak-check=full --show-leak-kinds=all --track-origins=yes 
--track-fds=yes ./btserver*

-----

--19817-- VALGRIND INTERNAL ERROR: Valgrind received a signal 11 
(SIGSEGV) - exiting
--19817-- si_code=128;  Faulting address: 0x0;  sp: 0x100993be30

valgrind: the 'impossible' happened:
    Killed by fatal signal

host stacktrace:
==19817==    at 0x580492FF: get_bszB_as_is (m_mallocfree.c:302)
==19817==    by 0x580492FF: get_bszB (m_mallocfree.c:314)
==19817==    by 0x580492FF: vgPlain_arena_malloc (m_mallocfree.c:1819)
==19817==    by 0x58004D74: vgMemCheck_new_block (mc_malloc_wrappers.c:370)
==19817==    by 0x58004F99: vgMemCheck___builtin_new 
(mc_malloc_wrappers.c:415)
==19817==    by 0x58093FD5: do_client_request (scheduler.c:1979)
==19817==    by 0x58093FD5: vgPlain_scheduler (scheduler.c:1542)
==19817==    by 0x580DA8DA: thread_wrapper (syswrap-linux.c:102)
==19817==    by 0x580DA8DA: run_a_thread_NORETURN (syswrap-linux.c:155)

sched status:
   running_tid=1

Thread 1: status = VgTs_Runnable (lwpid 19817)
==19817==    at 0x4841EF1: operator new(unsigned long) 
(vg_replace_malloc.c:472)
==19817==    by 0x60FFB3: Card::checkNewPort(LFInfo&, String const&, 
char const*, bool, char const*, bool&, bool&, unsigned int) (Card.cc:7510)
==19817==    by 0x611337: Card::discoverDevices(LFInfo&, char const*, 
bool) (Card.cc:8205)
==19817==    by 0x84815E: btserver_main(int, char**) (main.cc:1034)
==19817==    by 0x844F64: main (main.cc:157)
client stack range: [0x1FFEFEA000 0x1FFF000FFF] client SP: 0x1FFEFFDB30
valgrind stack range: [0x100983C000 0x100993BFFF] top usage: 13936 of 
1048576


-- 
Jed Reynolds, Sr. Developer and Sysadmin
Candela Technologies [PST, GMT -8]
Please CC:su...@ca...  on support emails.