tree 1f28f42cf54df964c0896d92826fa64f947c5a74
parent 04d89f758a440249c5e37c508d392a7227b2665d
author Vitaly Buka <vitalybuka@google.com> 1550186968 +0000
committer Vitaly Buka <vitalybuka@google.com> 1550186968 +0000

[lld] Fix elf::unlinkAsync detached thread

Summary:
So this patch just make sure that the thread is at least stated
before we return from main.

If we just detach then the thread may be actually be stated just after
the process returned from main and it's calling atexit handers. Then the thread may try to create own function static variable and it will
add new at exit handlers confusing libc.

GLIBC before 2.27 had race in that case which corrupted atexit handlers
list. Support for this use-case for other implementation is also unclear,
so we can try just avoid that.

PR40162

Reviewers: ruiu, espindola

Subscribers: emaste, arichardson, jfb, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D58246

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@354078 91177308-0d34-0410-b5e6-96231b3b80d8