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Summary:
pthread_join() can return before a thread finishes exit()ing in the
kernel and a subsequent tgkill() can report the thread still alive.
Update the pthread-cleanup.c test to sleep and retry if it hits this
possible flake.
Thanks to Jeremy Morse for reporting.
Reviewers: jmorse, eugenis, vitalybuka
Reviewed By: jmorse, vitalybuka
Subscribers: delcypher, jfb, llvm-commits, #sanitizers, kcc
Differential Revision: https://reviews.llvm.org/D52330
llvm-svn: 342763
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This relands commit r339405 (reverted in commit r339408.) The original
revert was due to tests failing on a darwin buildbot; however, after
looking at the affected code more I realized that the Darwin safestack
support has always been broken and disabled it in r339719. This relands
the original commit.
llvm-svn: 339723
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This reverts commit r339405, it's failing on Darwin buildbots because
it doesn't seem to have a tgkill/thr_kill2 interface. It has a
__pthread_kill() syscall, but that relies on having a handle to the
thread's port which is not equivalent to it's tid.
llvm-svn: 339408
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Summary:
glibc can call SafeStack instrumented code even after the last pthread
data destructor has run. Delay cleaning-up unsafe stacks for threads
until the thread is dead by having future threads clean-up prior threads
stacks.
Reviewers: pcc, eugenis
Reviewed By: eugenis
Subscribers: cryptoad, eugenis, kubamracek, delcypher, llvm-commits, #sanitizers, kcc
Differential Revision: https://reviews.llvm.org/D50406
llvm-svn: 339405
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compiler-rt runtime support library
This patch adds runtime support for the Safe Stack protection to compiler-rt
(see http://reviews.llvm.org/D6094 for the detailed description of the
Safe Stack).
This patch is our implementation of the safe stack on top of compiler-rt. The
patch adds basic runtime support for the safe stack to compiler-rt that
manages unsafe stack allocation/deallocation for each thread.
Original patch by Volodymyr Kuznetsov and others at the Dependable Systems
Lab at EPFL; updates and upstreaming by myself.
Differential Revision: http://reviews.llvm.org/D6096
llvm-svn: 239763
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