Commit Graph

27 Commits

Author SHA1 Message Date
Sam McCall a451156bb6 reland [gtest] Fix printing of StringRef and SmallString in assert messages.
Renames GTEST_NO_LLVM_RAW_OSTREAM -> GTEST_NO_LLVM_SUPPORT and guards
the new features behind it.

This reverts commit a063bcf3ef5a879adbe9639a3c187d876eee0e66.

llvm-svn: 369527
2019-08-21 13:56:29 +00:00
Kostya Serebryany 0feed5d585 [libFuzzer] in autofocus mode, give more weight to functions with DFT
llvm-svn: 363473
2019-06-14 23:29:56 +00:00
Kostya Serebryany e9aaa5582f [libFuzzer] implement -focus_function=auto, to be used with Data Flow Traces
llvm-svn: 360378
2019-05-09 21:29:45 +00:00
Kostya Serebryany b96b10d1a3 [libFuzzer] fix the unit tests
llvm-svn: 354088
2019-02-15 00:15:13 +00:00
Kostya Serebryany 96f81bc679 [libFuzzer] when doing the merge, keep track of the coveraged edges, not just features
llvm-svn: 354076
2019-02-14 23:12:33 +00:00
Kostya Serebryany 0fda9dcbe9 [libFuzzer] more refactoring; change some of the exit codes (timeout, OOM, interrupt) so that the parent process can distinguish those
llvm-svn: 353584
2019-02-09 00:16:21 +00:00
Kostya Serebryany b1e8b8149b [libFuzzer] remove two unused experimental flags
llvm-svn: 353573
2019-02-08 22:02:37 +00:00
Kostya Serebryany f762a11544 [libFuzzer] introduce an experimental mode -fork=1, where fuzzing happens in a subprocess (still running multiple inputs per process), thus making the fuzzing more resilient to timeouts and OOMs. This is just a skeleton of the code, and some associated refactoring, not a fully working feature yet.
llvm-svn: 353570
2019-02-08 21:27:23 +00:00
Chandler Carruth 2946cd7010 Update the file headers across all of the LLVM projects in the monorepo
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636
2019-01-19 08:50:56 +00:00
Matt Morehouse 7e042bb1d1 [libFuzzer] Port to Windows
Summary:
Port libFuzzer to windows-msvc.
This patch allows libFuzzer targets to be built and run on Windows, using -fsanitize=fuzzer and/or fsanitize=fuzzer-no-link. It allows these forms of coverage instrumentation to work on Windows as well.
It does not fix all issues, such as those with -fsanitize-coverage=stack-depth, which is not usable on Windows as of this patch.
It also does not fix any libFuzzer integration tests. Nearly all of them fail to compile, fixing them will come in a later patch, so libFuzzer tests are disabled on Windows until them.

Patch By: metzman

Reviewers: morehouse, rnk

Reviewed By: morehouse, rnk

Subscribers: #sanitizers, delcypher, morehouse, kcc, eraman

Differential Revision: https://reviews.llvm.org/D51022

llvm-svn: 341082
2018-08-30 15:54:44 +00:00
Matt Morehouse cf311cfc20 Revert "[libFuzzer] Port to Windows"
This reverts r340949 due to bot breakage again.

llvm-svn: 340954
2018-08-29 18:40:41 +00:00
Matt Morehouse 245ebd71ef [libFuzzer] Port to Windows
Summary:
Port libFuzzer to windows-msvc.
This patch allows libFuzzer targets to be built and run on Windows, using -fsanitize=fuzzer and/or fsanitize=fuzzer-no-link. It allows these forms of coverage instrumentation to work on Windows as well.
It does not fix all issues, such as those with -fsanitize-coverage=stack-depth, which is not usable on Windows as of this patch.
It also does not fix any libFuzzer integration tests. Nearly all of them fail to compile, fixing them will come in a later patch, so libFuzzer tests are disabled on Windows until them.

Reviewers: morehouse, rnk

Reviewed By: morehouse, rnk

Subscribers: #sanitizers, delcypher, morehouse, kcc, eraman

Differential Revision: https://reviews.llvm.org/D51022

llvm-svn: 340949
2018-08-29 18:08:34 +00:00
Matt Morehouse bab8556f01 Revert "[libFuzzer] Port to Windows"
This reverts commit r340860 due to failing tests.

llvm-svn: 340867
2018-08-28 19:07:24 +00:00
Matt Morehouse c6fff3b6f5 [libFuzzer] Port to Windows
Summary:
Port libFuzzer to windows-msvc.
This patch allows libFuzzer targets to be built and run on Windows, using -fsanitize=fuzzer and/or fsanitize=fuzzer-no-link. It allows these forms of coverage instrumentation to work on Windows as well.
It does not fix all issues, such as those with -fsanitize-coverage=stack-depth, which is not usable on Windows as of this patch.
It also does not fix any libFuzzer integration tests. Nearly all of them fail to compile, fixing them will come in a later patch, so libFuzzer tests are disabled on Windows until them.

Patch By: metzman

Reviewers: morehouse, rnk

Reviewed By: morehouse, rnk

Subscribers: morehouse, kcc, eraman

Differential Revision: https://reviews.llvm.org/D51022

llvm-svn: 340860
2018-08-28 18:34:32 +00:00
Kostya Serebryany 6b87e0c18f [libFuzzer] first experimental attempt at DFT-based mutations (DFT=data-flow-trace)
llvm-svn: 337434
2018-07-19 01:23:32 +00:00
Kostya Serebryany 67af99235f [libFuzzer] make the corpus elements aware of their data flow traces
llvm-svn: 334158
2018-06-07 01:40:20 +00:00
Kostya Serebryany 1fd005f552 [libFuzzer] initial implementation of -data_flow_trace. It parses the data flow trace and prints the summary, but doesn't use the information in any other way yet
llvm-svn: 334058
2018-06-06 01:23:29 +00:00
Kostya Serebryany e9c6f06cce [libFuzzer] add an experimental flag -focus_function: libFuzzer will try to focus on inputs that trigger that function
llvm-svn: 332554
2018-05-16 23:26:37 +00:00
Dan Liew dfd5a90a99 [LibFuzzer] Tweak `MutationDispatcher::Mutate_CopyPart` mutation.
It doesn't make sense to non-deterministically choose between
`CopyPart(..)` and `InsertPart(..)` when it is known that
`InsertPart(..)` will fail.

This upstream's a change from JFS solver's fork of LibFuzzer.

Differential Revision: https://reviews.llvm.org/D45693

llvm-svn: 330687
2018-04-24 06:31:09 +00:00
Dan Liew 25d0c65ff3 [LibFuzzer] Try to unbreak the `FuzzerMutate.ShuffleBytes1` unit test.
This test is failing on my Linux box. Just increasing the number of
iterations works around this. The divergence is likely due to
our reliance on `std::shuffle()` which is not guaranteed to have
the same behaviour across platforms.

This is a strong argument for us to implement our own shuffle
function to avoid divergence in behaviour across platforms.

Differential Revision: https://reviews.llvm.org/D45767

llvm-svn: 330390
2018-04-20 06:46:14 +00:00
Kostya Serebryany a97bd9a7d3 [libFuzzer] Decrease stack usage in unit tests
Summary: With 3 Dictionary objects, each containing space of ~16k DictionaryEntry objects, the MutationDispatcher object is fairly memory heavy.  On platforms with a lower default stack size, this can cause panics in FuzzerUnittest as those tests stack-allocate the MutationDispatcher.  This may be especially problematic for platforms that do not (yet) have a way to programmatically change their stack size, aside from link-time flags.  In general, it seems more prudent to use the heap for an object of this size.

Reviewers: kcc, morehouse

Reviewed By: kcc

Differential Revision: https://reviews.llvm.org/D40926

llvm-svn: 319988
2017-12-06 23:35:02 +00:00
Matt Morehouse 056774d13b [libFuzzer] Make redirects happen in proper sequence.
"> file" must come before "2>&1" to have redirection occur correctly in
all cases.  Fixes a regression on minimize_two_crashes.test.

llvm-svn: 319792
2017-12-05 17:13:17 +00:00
Matt Morehouse 04304d129b [libFuzzer] Encapsulate commands in a class.
Summary:
To be more portable (especially w.r.t. platforms without system()),
commands should be managed programmatically rather than via string
manipulation on the command line. This change introduces
Fuzzer::Command, with methods to manage arguments and flags, set output
options, and execute the command.

Patch By: aarongreen

Reviewers: kcc, morehouse

Reviewed By: kcc, morehouse

Subscribers: llvm-commits, mgorny

Differential Revision: https://reviews.llvm.org/D40103

llvm-svn: 319680
2017-12-04 19:25:59 +00:00
George Karpenkov bebcbfb46d [libFuzzer] Use custom allocators for STL containers in libFuzzer.
Avoids ODR violations causing spurious ASAN warnings.

Differential Revision: https://reviews.llvm.org/D37086

llvm-svn: 311866
2017-08-27 23:20:09 +00:00
George Karpenkov 24069a0424 Revert "[libFuzzer] Use custom allocators for STL containers in libFuzzer"
This reverts commit 3539efc2f2218dba2bcbd645d0fe276f2b5cf588.

llvm-svn: 311831
2017-08-26 17:50:35 +00:00
George Karpenkov d50410bfb1 [libFuzzer] Use custom allocators for STL containers in libFuzzer
Avoids ODR violations causing spurious ASAN container overflow warnings.

Differential Revision: https://reviews.llvm.org/D37086

llvm-svn: 311830
2017-08-26 17:17:37 +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