https://bugs.kde.org/show_bug.cgi?id=372600
Bug ID: 372600 Summary: process loops forever when fatal signals are arriving quickly Product: valgrind Version: 3.12 SVN Platform: Other OS: Linux Status: UNCONFIRMED Severity: normal Priority: NOR Component: general Assignee: jsew...@acm.org Reporter: philippe.waroqui...@skynet.be Target Milestone: --- Created attachment 102283 --> https://bugs.kde.org/attachment.cgi?id=102283&action=edit reproducer and fix for process looping for ever when burst of fatal signals When fatal signal are arriving quickly, several threads might handle these fatal signals, and in parallel believe they have to vgkill the other threads and wait for the other threads to disappear. When this happens, the valgrind process loops forever 100% of cpu. This a bug that was already existing in 3.11 but in 3.11 was manifesting itself with several messages telling the process was being killed. The patch I will attach contains a regression test which very quickl reproduces the problem on ppc64. You might need some more loops on amd64. To reproduce the problem (with the untouched trunk, as the patch fixes it): while true do ../trunk/vg-in-place --tool=none none/tests/pth_2sig done And after some time, V loops at 100% of cpu. With the fix, the loop has done hundreds of runs without blocking, on amd64 and ppc64. -- You are receiving this mail because: You are watching all bug changes.