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27 Commits

Author SHA1 Message Date
Kostya Serebryany 80e9a6ccd1 [libFuzzer] add linux-specific test for gc-sections 
llvm-svn: 313421
 2017-09-15 23:07:18 +00:00
Kostya Serebryany ad66fefdca [libFuzzer] test fix 
llvm-svn: 313411
 2017-09-15 22:29:20 +00:00
Max Moroz 1a33da2401 [libFuzzer] Fix lit files to make running tests more straightforward on Mac OS. 
Summary:
Current implementation does not work if CMAKE_OSX_SYSROOT is not specified.

It silently generates invalid command with the following flags:

`-std=c++11 -lc++ -gline-tables-only -isysroot  -fsanitize=address,fuzzer`

and then fails with the following error:

```
warning: no such sysroot directory: '-fsanitize=address,fuzzer' [-Wmissing-sysroot]"
<...>/RepeatedBytesTest.cpp:5:10: fatal error: 'assert.h' file not found
#include <assert.h>
         ^~~~~~~~~~
1 error generated.
```

However, if you have Command Line Tools installed, you have '/usr/include' dir.
In that case, it is not necessary to specify isysroot path.

Also, with the patch, in case of '/usr/include' does not exist, the '-sysroot'
path would be resolved automatically in compiler-rt/cmake/base-config-ix.cmake.

For more context, see the comment at `compiler-rt/cmake/base-config-ix.cmake#L76`

Reviewers: kcc, george.karpenkov

Reviewed By: kcc, george.karpenkov

Differential Revision: https://reviews.llvm.org/D37721

llvm-svn: 313033
 2017-09-12 15:02:10 +00:00
Max Moroz 3f26dac416 [libfuzzer] Compare TotalNumberOfRuns with MaxNumberOfRuns when testing a memory leak. 
Summary:
Fuzzer::TryDetectingAMemoryLeak may call ExecuteCallback which would
increment TotalNumberOfRuns, but it doesn't respect Options.MaxNumberOfRuns
value specified by a user.

Context: https://github.com/google/oss-fuzz/issues/822#issuecomment-328153970

Reviewers: kcc

Reviewed By: kcc

Differential Revision: https://reviews.llvm.org/D37632

llvm-svn: 312993
 2017-09-12 02:01:54 +00:00
Kostya Serebryany 754e584076 [libFuzzer] simplify CustomCrossOverTest even more 
llvm-svn: 312697
 2017-09-07 05:33:05 +00:00
Kostya Serebryany 57c03648e1 [libFuzzer] simplify CustomCrossOverTest a bit more 
llvm-svn: 312695
 2017-09-07 05:23:23 +00:00
Kostya Serebryany d0386fac26 [libFuzzer] simplify and re-enable CustomCrossOverTest 
llvm-svn: 312689
 2017-09-07 02:04:06 +00:00
Kostya Serebryany 79cdf36a2c [libFuzzer] remporary disable an unstable test 
llvm-svn: 312593
 2017-09-05 23:45:54 +00:00
Kostya Serebryany 07490f8415 [libFuzzer] use more iterations for a test 
llvm-svn: 312356
 2017-09-01 19:45:08 +00:00
George Karpenkov 2928375cd2 [libFuzzer] Enable 8-bit counters test on macOS 
llvm-svn: 312339
 2017-09-01 17:13:26 +00:00
Matt Morehouse 034126e507 [SanitizeCoverage] Enable stack-depth coverage for -fsanitize=fuzzer 
Summary:
- Don't sanitize __sancov_lowest_stack.
- Don't instrument leaf functions.
- Add CoverageStackDepth to Fuzzer and FuzzerNoLink.
- Only enable on Linux.

Reviewers: vitalybuka, kcc, george.karpenkov

Reviewed By: kcc

Subscribers: kubamracek, cfe-commits, llvm-commits, hiraditya

Differential Revision: https://reviews.llvm.org/D37156

llvm-svn: 312185
 2017-08-30 22:49:31 +00:00
Matt Morehouse ba2e61b357 Revert "[SanitizeCoverage] Enable stack-depth coverage for -fsanitize=fuzzer" 
This reverts r312026 due to bot breakage.

llvm-svn: 312047
 2017-08-29 21:56:56 +00:00
Kostya Serebryany 4faeb87ebe [libFUzzer] change the way we load the seed corpora: instead of loading all files and these executing all files, load and execute them one-by-one. This should reduce the memory usage in many cases 
llvm-svn: 312033
 2017-08-29 20:51:24 +00:00
Matt Morehouse 2ad8d948b2 [SanitizeCoverage] Enable stack-depth coverage for -fsanitize=fuzzer 
Summary:
- Don't sanitize __sancov_lowest_stack.
- Don't instrument leaf functions.
- Add CoverageStackDepth to Fuzzer and FuzzerNoLink.
- Disable stack depth tracking on Mac.

Reviewers: vitalybuka, kcc, george.karpenkov

Reviewed By: kcc

Subscribers: kubamracek, cfe-commits, llvm-commits, hiraditya

Differential Revision: https://reviews.llvm.org/D37156

llvm-svn: 312026
 2017-08-29 19:48:12 +00:00
Kostya Serebryany c07008653c [libFuzzer] allow -print_funcs=N: N is the max number of new covered function printed 
llvm-svn: 311945
 2017-08-28 22:52:22 +00:00
George Karpenkov 52a3e48e9f [libFuzzer] Exclude a test failing on OS X. 
llvm-svn: 311916
 2017-08-28 20:10:30 +00:00
Matt Morehouse 6ec7595b1e Revert "[SanitizeCoverage] Enable stack-depth coverage for -fsanitize=fuzzer" 
This reverts r311801 due to a bot failure.

llvm-svn: 311803
 2017-08-25 22:01:21 +00:00
Matt Morehouse f42bd31323 [SanitizeCoverage] Enable stack-depth coverage for -fsanitize=fuzzer 
Summary:
- Don't sanitize __sancov_lowest_stack.
- Don't instrument leaf functions.
- Add CoverageStackDepth to Fuzzer and FuzzerNoLink.

Reviewers: vitalybuka, kcc

Reviewed By: kcc

Subscribers: cfe-commits, llvm-commits, hiraditya

Differential Revision: https://reviews.llvm.org/D37156

llvm-svn: 311801
 2017-08-25 21:18:29 +00:00
Kostya Serebryany 09c4161029 [libFuzzer] prepare tests for switching from -fsanitize-coverage=trace-pc-guard to -fsanitize-coverage=inline-8bit-counters 
llvm-svn: 311798
 2017-08-25 20:20:46 +00:00
Kostya Serebryany 2eef816e6e [libFuzzer] add -print_funcs=1 (on bey default): print newly discovered functions during fuzzing 
llvm-svn: 311797
 2017-08-25 20:09:25 +00:00
Kostya Serebryany d3e4b7e24a [sanitizer-coverage] extend fsanitize-coverage=pc-table with flags for every PC 
llvm-svn: 311794
 2017-08-25 19:29:47 +00:00
Matt Morehouse b1fa8255db [SanitizerCoverage] Optimize stack-depth instrumentation. 
Summary:
Use the initialexec TLS type and eliminate calls to the TLS
wrapper.  Fixes the sanitizer-x86_64-linux-fuzzer bot failure.

Reviewers: vitalybuka, kcc

Reviewed By: kcc

Subscribers: hiraditya, llvm-commits

Differential Revision: https://reviews.llvm.org/D37026

llvm-svn: 311490
 2017-08-22 21:28:29 +00:00
Kostya Serebryany 868e69091c [libFuzzer] disable a test failing on the bot 
llvm-svn: 311427
 2017-08-22 05:15:57 +00:00
Kostya Serebryany 33fb36c353 [libFuzzer] fix the stack-depth initialization, add a lit test for DeepRecursionTest.cpp 
llvm-svn: 311421
 2017-08-22 01:50:00 +00:00
George Karpenkov e4c5322992 [NFC] do not run linter on libFuzzer's tests. 
llvm-svn: 311419
 2017-08-22 01:19:17 +00:00
George Karpenkov 92d8000487 Remove check-fuzzer from check-all, as tests don't pass on some bots. 
llvm-svn: 311415
 2017-08-22 00:54:57 +00:00
George Karpenkov 10ab2ace13 Move libFuzzer to compiler_rt. 
Resulting library binaries will be named libclang_rt.fuzzer*, and will
be placed in Clang toolchain, allowing redistribution.

Differential Revision: https://reviews.llvm.org/D36908

llvm-svn: 311407
 2017-08-21 23:25:50 +00:00