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2016-11-22tsan: switch libignore from /proc/self/maps to dl_iterate_phdrDmitry Vyukov
/proc/self/maps can't be read atomically, this leads to episodic crashes in libignore as it thinks that a module is loaded twice. See the new test for an example. dl_iterate_phdr does not have this problem. Switch libignore to dl_iterate_phdr. git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@287632 91177308-0d34-0410-b5e6-96231b3b80d8