[all-commits] [llvm/llvm-project] 87ca22: [Support] Attempt to fix deadlock in ThreadGroup
Tom Stellard via All-commits
all-commits at lists.llvm.org
Thu Dec 16 11:03:08 PST 2021
Branch: refs/heads/release/13.x
Home: https://github.com/llvm/llvm-project
Commit: 87ca22cba2fad9bbf553a74eced3b7bb69e187be
https://github.com/llvm/llvm-project/commit/87ca22cba2fad9bbf553a74eced3b7bb69e187be
Author: Alexandre Ganea <alexandre.ganea at ubisoft.com>
Date: 2021-12-16 (Thu, 16 Dec 2021)
Changed paths:
M llvm/include/llvm/Support/Parallel.h
M llvm/lib/Support/Parallel.cpp
Log Message:
-----------
[Support] Attempt to fix deadlock in ThreadGroup
This is an attempt to fix the situation described by https://reviews.llvm.org/D104207#2826290 and PR41508.
See sequence of operations leading to the bug in https://reviews.llvm.org/D104207#3004689
We ensure that the Latch is completely "free" before decrementing the number of TaskGroupInstances.
Differential revision: https://reviews.llvm.org/D109914
(cherry picked from commit 7b25fa8c7a151e94be46ed8f0a56bf4e2af1c104)
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