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| Reply-To: | Brian DOT Inglis AT SystematicSw DOT ab DOT ca |
| Subject: | Re: GDB and thread |
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| From: | Brian Inglis <Brian DOT Inglis AT SystematicSw DOT ab DOT ca> |
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| Date: | Sat, 28 Dec 2019 21:38:45 -0700 |
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On 2019-12-28 15:28, Marco Atzeri wrote: > Am 28.12.2019 um 23:03 schrieb Ken Brown: >> On 12/28/2019 4:27 PM, Marco Atzeri wrote: >>> I am trying to debug the libuv test failures, >>> but it seems I am not able to convince GDB on stopping >>> just before the failure. >>> >>> Is "thread apply all" working on Cygwin ? >>> The fact that produces no output in comparison to >>> a normal break command is a bit strange >>> >>> (gdb) break test-dlerror.c:34 >>> Breakpoint 1 at 0x10040b0b0: file /pub/devel/libuv/libuv-1.34.0/test/test-dlerro >>> r.c, line 34. >>> (gdb) thread apply all break test-dlerror.c:34 >> >> Others know this better than I do, but I seem to recall that a break command >> automatically applies to all threads. In other words, "thread apply all" is >> redundant. > > It seems to ignore any break for what I see. > thread apply all was a tentative after simple break was ineffective >>> Any hint will be appreciated >> >> Might this be related to optimization? That could change the order in which >> lines of code are executed. Have you tried building without optimization? > > Already thought, but it is built with -ggdb -O0 Recommended to use at least -Og nowadays for better debugging: $ info gcc inv debug "With no '-O' option at all, some compiler passes that collect information useful for debugging do not run at all, so that '-Og' may result in a better debugging experience." -- Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada This email may be disturbing to some readers as it contains too much technical detail. Reader discretion is advised. -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
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