Ken Werner <[email protected]> writes: > On Wednesday, March 23, 2011 9:50:05 am Henrik Grindal Bakken wrote: >> Hi Ken, >> >> This patch set works better for me, but I get a crash (SIGSEGV) when >> trying to get backtrace from a signal handler. I'll try to figure out >> why... > > Hi Henrik > > I've hacked a small test but wasn't able to reproduce the segfault on my > system. Could you share your code or elaborate on what you did? Attached is > the test case I was using.
Hi again Ken, Trying to reproduce it now, I don't see the same errors I used to. As long as I remember to add UNW_ARM_UNWIND_METHOD=4 (should this be the default on arm?), I get a fairly good backtrace from signal handler. It typically looks like this: /tmp/libunwind-test(foo+0x40) [0xaab8] /lib/libpthread.so.0(_pthread_cleanup_pop_restore+0x1c) [0x402497e4] /tmp/libunwind-test(main+0x44) [0xabb4] /lib/libc.so.6(__libc_start_main+0x120) [0x402705e0] /tmp/libunwind-test() [0xa9e4] Where I suppose _pthread_cleanup_pop_restore should've been bar() in my code, but that's a) not critical, and b) possibly solvable in the signal handler. -- Henrik Grindal Bakken <[email protected]> PGP ID: 8D436E52 Fingerprint: 131D 9590 F0CF 47EF 7963 02AF 9236 D25A 8D43 6E52 _______________________________________________ Libunwind-devel mailing list [email protected] http://lists.nongnu.org/mailman/listinfo/libunwind-devel
