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Dan Liew 22b310e67c [LibFuzzer] Fix -jobs=<N> where <N> > 1 and the number of workers is > 1 on macOS. 
The original `ExecuteCommand()` called `system()` from the C library.
The C library implementation of this on macOS contains a mutex which
serializes calls to `system()`. This prevented the `-jobs=` flag
from running copies of the fuzzing binary in parallel which is
the opposite of what is intended.

To fix this on macOS an alternative implementation of `ExecuteCommand()`
is provided that can be used concurrently. This is provided in
`FuzzerUtilDarwin.cpp` which is guarded to only compile code on Apple
platforms. The existing implementation has been moved to a new file
`FuzzerUtilLinux.cpp` which is guarded to only compile code on Linux.

This commit includes a simple test to check that LibFuzzer is being
executed in parallel when requested.

Differential Revision: https://reviews.llvm.org/D22742

llvm-svn: 278544
2016-08-12 18:29:36 +00:00
bindings [OCaml] Add functions for accessing metadata nodes. 2016-06-22 03:30:24 +00:00
cmake Remove LLVM_ENABLE_LIBCXXABI 2016-08-04 10:24:48 +00:00
docs [Coroutines]: Part6b: Add coro.id intrinsic. 2016-08-12 05:45:49 +00:00
examples Use the range variant of find instead of unpacking begin/end 2016-08-11 22:21:41 +00:00
include ADT: Remove stale header comments about next/prev after r278532 2016-08-12 18:14:42 +00:00
lib [LibFuzzer] Fix -jobs=<N> where <N> > 1 and the number of workers is > 1 on macOS. 2016-08-12 18:29:36 +00:00
projects Remove autoconf support 2016-01-26 21:29:08 +00:00
resources
runtimes [CMake] Add LLVM runtimes directory 2016-06-23 22:07:21 +00:00
test [PM] Port LowerInvoke to the new pass manager 2016-08-12 17:28:27 +00:00
tools [PM] Port ModuleSummaryIndex analysis to new pass manager 2016-08-12 13:53:02 +00:00
unittests ADT: Remove all ilist_iterator => pointer casts, NFC 2016-08-12 05:05:36 +00:00
utils Use the range variant of remove_if instead of unpacking begin/end 2016-08-12 04:32:37 +00:00
.arcconfig Upgrade all the .arcconfigs to https. 2016-07-14 13:15:37 +00:00
.clang-format
.clang-tidy Don't use misc-unused-parameters check on LLVM. 2016-04-13 08:58:52 +00:00
.gitignore [CMake] Add LLVM runtimes directory 2016-06-23 22:07:21 +00:00
CMakeLists.txt Remove LLVM_ENABLE_LIBCXXABI 2016-08-04 10:24:48 +00:00
CODE_OWNERS.TXT test commit 2016-08-02 19:25:17 +00:00
configure Remove autoconf support 2016-01-26 21:29:08 +00:00
CREDITS.TXT Shamelessly add myself to CREDITS.TXT 2016-08-04 16:28:22 +00:00
LICENSE.TXT Remove whitespace 2016-08-12 17:53:06 +00:00
llvm.spec.in
LLVMBuild.txt
README.txt Revert rL277454 2016-08-02 13:26:07 +00:00
RELEASE_TESTERS.TXT Adding RELEASE_TESTERS.TXT 2016-07-21 16:46:44 +00:00

README.txt 

Low Level Virtual Machine (LLVM)
================================

This directory and its subdirectories contain source code for LLVM,
a toolkit for the construction of highly optimized compilers,
optimizers, and runtime environments.

LLVM is open source software. You may freely distribute it under the terms of
the license agreement found in LICENSE.txt.

Please see the documentation provided in docs/ for further
assistance with LLVM, and in particular docs/GettingStarted.rst for getting
started with LLVM and docs/README.txt for an overview of LLVM's
documentation setup.

If you are writing a package for LLVM, see docs/Packaging.rst for our
suggestions.