tree 8e1c8e0c12537a0461a1f754809c57fd2cb4fd1b
parent 2e59427d2e766f51a35ac673e86f6fdb0e5d0f89
author Alexander Richardson <arichardson.kde@gmail.com> 1566836524 +0000
committer Alexander Richardson <arichardson.kde@gmail.com> 1566836524 +0000

[asan_symbolize] Avoid blocking when llvm-symbolizer is installed as addr2line

Summary:
Currently, llvm-symbolizer will print -1 when presented with -1 and not
print a second line. In that case we will block for ever trying to read
the file name. This also happens for non-existent files, in which case GNU
addr2line exits immediate, but llvm-symbolizer does not (see
https://llvm.org/PR42754). While touching these lines, I also added some
more debug logging to help diagnose this and potential future issues.

Reviewers: kcc, eugenis, glider, samsonov

Reviewed By: eugenis

Subscribers: kubamracek, #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D65322

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@369924 91177308-0d34-0410-b5e6-96231b3b80d8