Profiling of runtime-internal locks checks gp.m.locks to see if it's safe to add a new record to the profile, but direct use of acquireLockRank can change the list of the M's active lock ranks without updating gp.m.locks to match. The runtime's internal rwmutex implementation makes a point of calling acquirem/releasem when manipulating the lock rank list, but the other user of acquireLockRank (the GC's Gscan bit) relied on the GC's invariants to avoid deadlocks. Codify the rwmutex approach by renaming acquireLockRank to acquireLockRankAndM and having it include a call to aquirem. Do the same for release. For #64706 For #66004 Change-Id: Id18e4d8de1036de743d2937fad002c6feebe2faf |
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README.md
The Go Programming Language
Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.
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