Bug 27044 - lock loop on some conditional probes
Summary: lock loop on some conditional probes
Status: RESOLVED FIXED
Alias: None
Product: systemtap
Classification: Unclassified
Component: translator (show other bugs)
Version: unspecified
: P2 normal
Target Milestone: ---
Assignee: Frank Ch. Eigler
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2020-12-10 03:24 UTC by Frank Ch. Eigler
Modified: 2020-12-10 04:01 UTC (History)
1 user (show)

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Description Frank Ch. Eigler 2020-12-10 03:24:48 UTC 
Bug #26511 introduced a different code generation for stap global locking,
but contained a bug related to handling of on-the-fly activated probes.
In certain cases/workloads (uprobes_onthefly.exp e.g.) it was possible
to freeze a machine.  The bug is associated with where control flow jumps
after a lock attempt failure just before executing probe conditional
expressions.
Comment 1 Frank Ch. Eigler 2020-12-10 04:00:44 UTC 
commit e3287bddcdc5