fork_syscall.cpp - OpenGrok history log for /llvm-project-15.0.7/compiler-rt/test/tsan/Linux/fork

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# 04b2ada5	11-May-2021	Dmitry Vyukov <[email protected]>	tsan: add a simple syscall test Add a simple test that uses syscall annotations. Just to ensure at least basic functionality works. Also factor out annotated syscall wrappers into a separate header tsan: add a simple syscall test Add a simple test that uses syscall annotations. Just to ensure at least basic functionality works. Also factor out annotated syscall wrappers into a separate header file as they may be useful for future tests. Reviewed By: vitalybuka Differential Revision: https://reviews.llvm.org/D102223 show more ...
# b6df8529	30-Apr-2021	Dmitry Vyukov <[email protected]>	tsan: fix fork syscall test Arm64 builders failed with: error: use of undeclared identifier 'SYS_fork' https://lab.llvm.org/buildbot/#/builders/7/builds/2575 Indeed, not all arches have fork syscal tsan: fix fork syscall test Arm64 builders failed with: error: use of undeclared identifier 'SYS_fork' https://lab.llvm.org/buildbot/#/builders/7/builds/2575 Indeed, not all arches have fork syscall. Implement fork via clone on these arches. Differential Revision: https://reviews.llvm.org/D101603 show more ...
# ed7bf7d7	30-Apr-2021	Dmitry Vyukov <[email protected]>	tsan: refactor fork handling Commit efd254b6362 ("tsan: fix deadlock in pthread_atfork callbacks") fixed another deadlock related to atfork handling. But builders with DCHECKs enabled reported failu tsan: refactor fork handling Commit efd254b6362 ("tsan: fix deadlock in pthread_atfork callbacks") fixed another deadlock related to atfork handling. But builders with DCHECKs enabled reported failures of pthread_atfork_deadlock2.c and pthread_atfork_deadlock3.c tests related to the fact that we hold runtime locks on interceptor exit: https://lab.llvm.org/buildbot/#/builders/70/builds/6727 This issue is somewhat inherent to the current approach, we indeed execute user code (atfork callbacks) with runtime lock held. Refactor fork handling to not run user code (atfork callbacks) with runtime locks held. This change does this by installing own atfork callbacks during runtime initialization. Atfork callbacks run in LIFO order, so the expectation is that our callbacks run last, right before the actual fork. This way we lock runtime mutexes around fork, but not around user callbacks. Extend tests to also install after fork callbacks just to cover more scenarios. Some tests also started reporting real races that we previously suppressed. Also extend tests to cover fork syscall support. Reviewed By: vitalybuka Differential Revision: https://reviews.llvm.org/D101517 show more ...