* How to determine the thread holding a mutex? @ 2017-01-10 10:34 xxhdx1985126 2017-01-10 17:09 ` Philippe Waroquiers 0 siblings, 1 reply; 2+ messages in thread From: xxhdx1985126 @ 2017-01-10 10:34 UTC (permalink / raw) To: gdb [-- Warning: decoded text below may be mangled, UTF-8 assumed --] [-- Attachment #1: Type: text/plain; charset=UTF-8, Size: 276 bytes --] Hi, everyone. I'm trying to debug a problem that appears to be a deadlock. I wonder if I can use gdb to find out which thread is holding a mutex. If so, my work would be much easier, as there are many threads in my program. Please help me, Thank you:-)\x16º&ÖëzÛ«ŸŽy×¹b²Ö«r\x18\x1d ^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: How to determine the thread holding a mutex? 2017-01-10 10:34 How to determine the thread holding a mutex? xxhdx1985126 @ 2017-01-10 17:09 ` Philippe Waroquiers 0 siblings, 0 replies; 2+ messages in thread From: Philippe Waroquiers @ 2017-01-10 17:09 UTC (permalink / raw) To: xxhdx1985126; +Cc: gdb On Tue, 2017-01-10 at 18:34 +0800, xxhdx1985126 wrote: > Hi, everyone. > > I'm trying to debug a problem that appears to be a deadlock. I wonder > if I can use gdb to find out which thread is holding a mutex. > If so, my work would be much easier, as there are many threads in my program. What you can do is to use valgrind --tool=helgrind to first see if valgrind helgrind tool does not point at a possible culprit for the deadlock. Assuming helgrind does not explain the bug, and assuming that the deadlock reproduces under valgrind/helgrind, you can use the valgrind gdbserver monitor command 'info locks' to obtain the list of locks See http://www.valgrind.org/docs/manual/hg-manual.html#hg-manual.monitor-commands and http://www.valgrind.org/docs/manual/manual-core-adv.html#manual-core-adv.gdbserver for more information. Philippe ^ permalink raw reply [flat|nested] 2+ messages in thread
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