Messages in this thread |  | | Subject | Re: [PATCH] perf script: add flamegraph.py script | From | Andreas Gerstmayr <> | Date | Thu, 2 Apr 2020 15:04:31 +0200 |
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On 26.03.20 20:04, Kim Phillips wrote: > I now get a SIGSEGV when executing perf script report flamegraph. > > Here's a trace: > > #0 0x000055555590a9b2 in regs_map (regs=0x7fffffffbfc8, mask=16715775, > bf=0x7fffffffba60 "", size=512) at util/scripting-engines/trace-event-python.c:696 > #1 0x000055555590ab03 in set_regs_in_dict (dict=0x7ffff61dd500, sample=0x7fffffffbf20, > evsel=0x555555d7a700) at util/scripting-engines/trace-event-python.c:718
This error seems unrelated to flamegraph.py (occurs also with the stackcollapse.py script).
Looks like the intr_regs->regs can be 0 when running in DWARF mode (this error doesn't occur in the default mode). I've added a check and sent a patch. While at it, valgrind reported an invalid read in a different code path, which is fixed by the other patch I just sent a few minutes ago.
Can you please test again and report if there are any other issues?
Cheers, Andreas
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