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5 Commits

Author SHA1 Message Date
Dan Liew 30ca81f1f7 [LibFuzzer] Unbreak the build on macOS which was broken by r272858. 
``afl_driver.cpp`` currently relies on weak symbols which doesn't
work properly under macOS. For now fix the build by providing a
dummy implementation of ``LLVMFuzzerInitialize(...)``. This is just
a temporary measure until we fix ``afl_driver.cpp`` for macOS.

llvm-svn: 274778
 2016-07-07 18:14:11 +00:00
Vitaly Buka 0618cbacb6 [libFuzzer] Add standard license info and comment header to AFLDriverTest.cpp 
Summary: Add license info and brief description of file to AFLDriverTest.cpp.

Reviewers: kcc, aizatsky

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D21487

llvm-svn: 273527
 2016-06-23 02:19:36 +00:00
Vitaly Buka d01720d46d Enable libFuzzer's afl_driver to append stderr to a file. 
Summary:
[libFuzzer] Enable afl_driver to append stderr to a user specified file.

Append stderr of afl_driver to the file specified by the environmental variable
AFL_DRIVER_STDERR_DUPLICATE_FILENAME if it is set. This lets users see outputs
on crashes without rerunning crashing test cases (which won't work for crashes
that are difficult to reproduce). Before this patch, stderr would only be sent to afl-fuzz
and users would have no way of seeing it.

Reviewers: llvm-commits, aizatsky, kcc, vitalybuka

Subscribers: vitalybuka

Differential Revision: http://reviews.llvm.org/D21194

llvm-svn: 272858
 2016-06-16 00:14:42 +00:00
Vitaly Buka dca553d021 Revert "Enable libFuzzer's afl_driver to append stderr to a file." 
Crashes with AddressSanitizer: SEGV on unknown address
http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-fuzzer/builds/9924/steps/annotate/logs/stdio

This reverts commit r272706.

llvm-svn: 272726
 2016-06-14 22:09:00 +00:00
Vitaly Buka 4b73cc88bf Enable libFuzzer's afl_driver to append stderr to a file. 
Summary:
[libFuzzer] Enable afl_driver to append stderr to a user specified file.

Append stderr of afl_driver to the file specified by the environmental variable
AFL_DRIVER_STDERR_DUPLICATE_FILENAME if it is set. This lets users see outputs
on crashes without rerunning crashing test cases (which won't work for crashes
that are difficult to reproduce). Before this patch, stderr would only be sent to afl-fuzz
and users would have no way of seeing it.

Reviewers: llvm-commits, aizatsky, kcc, vitalybuka

Subscribers: vitalybuka

Differential Revision: http://reviews.llvm.org/D21194

llvm-svn: 272706
 2016-06-14 20:42:05 +00:00