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166 Commits

Author SHA1 Message Date
Matt Morehouse 86db6dd2ed [libFuzzer] Disable optimization for exit_on_src_pos.test. 
Test fails on Darwin with -O2.

llvm-svn: 328634
 2018-03-27 16:40:34 +00:00
Matt Morehouse 22a1afd99f [libFuzzer] Place volatile after pointer types. 
For a few tests, volatile was placed before the '*' in pointer
declarations, resulting in it applying to the underlying data rather
than the pointer itself.  Placing volatile after the '*' allows us to
switch those tests to -O2.

llvm-svn: 328633
 2018-03-27 16:40:20 +00:00
Matt Morehouse 93ce24838c [libFuzzer] Do not optimize minimize_two_crashes.test. 
Speculative fix for build bot breakage on Mac.

llvm-svn: 328576
 2018-03-26 19:36:20 +00:00
Matt Morehouse 5317f2e4c9 [libFuzzer] Use OptForFuzzing attribute with -fsanitize=fuzzer. 
Summary:
Disables certain CMP optimizations to improve fuzzing signal under -O1
and -O2.

Switches all fuzzer tests to -O2 except for a few leak tests where the
leak is optimized out under -O2.

Reviewers: kcc, vitalybuka

Reviewed By: vitalybuka

Subscribers: cfe-commits, llvm-commits

Differential Revision: https://reviews.llvm.org/D44798

llvm-svn: 328384
 2018-03-23 23:35:28 +00:00
George Karpenkov 430aa7405f [libFuzzer] Disable equivalence-signals test on Darwin due to persistent failures 
llvm-svn: 328125
 2018-03-21 17:55:36 +00:00
Petr Hosek 2d19f9036e [Fuzzer] Avoid the unnecessary rebuild of the custom libc++ 
This changes the add_custom_libcxx macro to resemble the
llvm_ExternalProject_Add. The primary motivation is to avoid
unnecessary libFuzzer rebuilds that are being done on every
Ninja/Make invocation. The libc++ should be only rebuilt whenever
the libc++ source itself changes.

Differential Revision: https://reviews.llvm.org/D43213

llvm-svn: 326921
 2018-03-07 18:14:09 +00:00
Hiroshi Inoue 93eaad7dac [NFC] fix trivial typos in comments 
"the the" -> "the"

llvm-svn: 323080
 2018-01-22 07:51:37 +00:00
Petr Hosek eac2b47b9f Reland "[libFuzzer] Support using libc++" 
This is needed in case the users of libFuzzer use libc++ in their
code, which the fuzz target (libFuzzer) will be linked against.
When libc++ source is available, we build a private version of it
and link it against libFuzzer which allows using the same static
library against codebases which use both libc++ and libstdc++.

Differential Revision: https://reviews.llvm.org/D37631

llvm-svn: 322755
 2018-01-17 20:39:14 +00:00
Petr Hosek 68bc4bd6e5 Revert "[libFuzzer] Support using libc++" 
This reverts commit r322604: test is failing for standalone compiler-rt.

llvm-svn: 322689
 2018-01-17 17:24:56 +00:00
Petr Hosek a1b57e694e [libFuzzer] Support using libc++ 
This is needed in case the users of libFuzzer use libc++ in their
code, which the fuzz target (libFuzzer) will be linked against.
When libc++ source is available, we build a private version of it
and link it against libFuzzer which allows using the same static
library against codebases which use both libc++ and libstdc++.

Differential Revision: https://reviews.llvm.org/D37631

llvm-svn: 322604
 2018-01-17 00:42:48 +00:00
Matt Morehouse 59e4e400c3 [libFuzzer] Fix bug introduced in r322380 that always links -lc++. 
llvm-svn: 322409
 2018-01-12 22:10:47 +00:00
Kamil Rytarowski e81e944199 lib Fuzzer FreeBSD support 
Summary: Patch by David CARLIER

Reviewers: vitalybuka, kcc, dim, emaste, davide, morehouse, george.karpenkov

Reviewed By: morehouse

Subscribers: george.karpenkov, kubamracek, srhines, mgorny, emaste, krytarowski

Differential Revision: https://reviews.llvm.org/D41642

llvm-svn: 322380
 2018-01-12 17:15:05 +00:00
Kostya Serebryany b99a7102c1 [libFuzzer] make the tests depend on ubsan 
llvm-svn: 320787
 2017-12-15 01:39:52 +00:00
Kostya Serebryany e9ed2327b6 [libFuzzer] change the strategy for -experimental_len_control to grow max_len slower 
llvm-svn: 320531
 2017-12-12 23:11:28 +00:00
Kostya Serebryany de891a1946 [libFuzzer] even less aggressive step function for stack depth. Also don't use asan in one test to speed it up 
llvm-svn: 320259
 2017-12-09 19:18:10 +00:00
Kostya Serebryany de9bafb162 [libFuzzer] add a flag -malloc_limit_mb 
llvm-svn: 319590
 2017-12-01 22:12:04 +00:00
Matt Morehouse 6497193cfe [libFuzzer] Fix flaky merge.test. 
llvm-svn: 318475
 2017-11-17 00:11:12 +00:00
Matt Morehouse 12615ec49b [libFuzzer] Make merge-sigusr.test work on Mac. 
llvm-svn: 318465
 2017-11-16 23:06:17 +00:00
Kostya Serebryany dc3c9eb0cf [libFuzzer] add more tests for merge 
llvm-svn: 318453
 2017-11-16 20:25:45 +00:00
Kostya Serebryany 0e194faeea [libFuzzer] disable test/fuzzer/merge-sigusr.test on Mac while investigating the bot failure 
llvm-svn: 318376
 2017-11-16 04:52:05 +00:00
Kostya Serebryany 8eb9ca2580 [libFuzzer] respect max_len during merge 
llvm-svn: 318302
 2017-11-15 16:42:52 +00:00
Kostya Serebryany c183e2c33b [libFuzzer] trying to make sigusr tests more reliable 
llvm-svn: 317852
 2017-11-10 00:26:23 +00:00
Kostya Serebryany e8637f45ea [libFuzzer] split a test into two 
llvm-svn: 317851
 2017-11-10 00:18:13 +00:00
Kostya Serebryany 533cbf749c [libFuzzer] use pkill instead of killall in a test since the bots don't have killall 
llvm-svn: 317840
 2017-11-09 22:01:06 +00:00
Kostya Serebryany 54a8456005 [libFuzzer] make sure to flush IO when done merging one file 
llvm-svn: 317835
 2017-11-09 21:30:33 +00:00
Matt Morehouse 947838c9c5 [libFuzzer] Don't add leaking inputs to corpus. 
Reviewers: kcc

Reviewed By: kcc

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D39850

llvm-svn: 317831
 2017-11-09 20:44:08 +00:00
Kostya Serebryany a2ca2dcc46 [libFuzzer] handle SIGUSR1/SIGUSR2 and try to exit grafully on these signals 
llvm-svn: 317829
 2017-11-09 20:30:19 +00:00
Kostya Serebryany 3ac31d4453 [libFuzzer] allow merge to resume after being preempted 
llvm-svn: 317767
 2017-11-09 05:49:28 +00:00
Kostya Serebryany e1d121d715 [libFuzzer] mechanically simplify a test, NFC 
llvm-svn: 317756
 2017-11-09 02:13:43 +00:00
Kostya Serebryany 8a94f220aa [libFuzzer] fix a test (and hopefully, the bot) 
llvm-svn: 317749
 2017-11-09 01:45:59 +00:00
Kostya Serebryany 68fdef1f7a [libFuzzer] allow user to specify the merge control file 
llvm-svn: 317747
 2017-11-09 01:05:29 +00:00
Vitaly Buka ca9075272b [fuzzer] Script to detect unbalanced allocation in -trace_malloc output 
Reviewers: kcc

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D39466

llvm-svn: 317119
 2017-11-01 20:27:06 +00:00
Vitaly Buka 7dbc1d8433 [fuzzer] Fix threaded stack printing 
Reviewers: kcc

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D39397

llvm-svn: 317071
 2017-11-01 03:02:59 +00:00
Vitaly Buka df00e89cdc Revert "[fuzzer] Fix threaded stack printing and nested mallocs" 
Fails on darwin

Revert "[fuzzer] Script to detect unbalanced allocation in -trace_malloc output"
Needs previous one.

This reverts commit r317034, r317036.

llvm-svn: 317061
 2017-11-01 00:55:52 +00:00
Vitaly Buka 0747700ce1 [fuzzer] Script to detect unbalanced allocation in -trace_malloc output 
Reviewers: kcc

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D39466

llvm-svn: 317036
 2017-10-31 20:50:07 +00:00
Vitaly Buka 58da33e35c [fuzzer] Fix threaded stack printing and nested mallocs 
Summary: Nested mallocs are possible with internal symbolizer.

Reviewers: kcc

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D39397

llvm-svn: 317034
 2017-10-31 20:49:48 +00:00
Kostya Serebryany 3c9e59d0f6 [libFuzzer] trying to make a test more stable on Mac 
llvm-svn: 316627
 2017-10-25 23:24:45 +00:00
Kostya Serebryany 51823d3aae [libFuzzer] tweam use_feature_frequency to be less aggressive; run a dummy input before the seed corpus 
llvm-svn: 315657
 2017-10-13 01:12:23 +00:00
Max Moroz 330496c3fc [libFuzzer] Disable experimental clang coverage support by default. 
Summary:
It can be enabled via "-use_clang_coverage=1" flag. Reason for disabling:
libFuzzer resets Clang Counters and makes it impossible to generate coverage
report for a regular fuzz target (i.e. not standalone build).

Reviewers: kcc

Reviewed By: kcc

Subscribers: kcc

Differential Revision: https://reviews.llvm.org/D38604

llvm-svn: 315029
 2017-10-05 22:41:03 +00:00
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