Commit Graph

17 Commits

Author SHA1 Message Date
David Carlier 53065c543f [Sanitizers] Remove OpenBSD support (new attempt)
- Fixing VS compiler and other cases settings this time.

Reviewers: dmajor, hans

Reviewed By: hans

Differential Revision: https://reviews.llvm.org/D89759
2020-10-20 11:16:09 +01:00
Evgenii Stepanov 7ecd60bb70 Revert "[Sanitizers] Remove OpenBSD support" + 1
Revert "Fix compiler-rt build on Windows after D89640"

This reverts commit a7acee89d6.
This reverts commit d09b08919c.

Reason: breaks Linux / x86_64 build.
2020-10-19 16:11:21 -07:00
David Carlier d09b08919c [Sanitizers] Remove OpenBSD support
- Removing unused and unusable code.

Reviewers: krytarowski

Reviewed By: krytarowski

Differential Revision: https://reviews.llvm.org/D89640
2020-10-18 14:57:07 +01:00
Ilya Leoshkevich 9df7ee34e1 [libFuzzer] Fix minimizing timeouts
When one tries to minimize timeouts using -minimize_crash=1,
minimization immediately fails. The following sequence of events is
responsible for this:

[parent] SIGALRM occurs
[parent] read() returns -EINTR (or -ERESTARTSYS according to strace)
[parent] fgets() returns NULL
[parent] ExecuteCommand() closes child's stdout and returns
[child ] SIGALRM occurs
[child ] AlarmCallback() attempts to write "ALARM: ..." to stdout
[child ] Dies with SIGPIPE without calling DumpCurrentUnit()
[parent] Does not see -exact_artifact_path and exits

When minimizing, the timer in parent is not necessary, so fix by not
setting it in this case.

Reviewed By: morehouse

Differential Revision: https://reviews.llvm.org/D85359
2020-08-11 22:16:12 +02:00
Dokyung Song 226866e115 [libFuzzer] Separate platform related macros out from FuzzerDefs.h into FuzzerPlatform.h, and adjust includes in other files.
Summary: This patch separates platform related macros in lib/fuzzer/FuzzerDefs.h into lib/fuzzer/FuzzerPlatform.h, and use FuzzerPlatform.h where necessary. This separation helps when compiling libFuzzer's interceptor module (under review); an unnecessary include of standard headers (such as string.h) may produce conflicts/ambiguation with the interceptor's declarations/definitions of library functions, which complicates interceptor implementation.

Reviewers: morehouse, hctim

Reviewed By: morehouse

Subscribers: krytarowski, #sanitizers

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D83805
2020-07-14 21:31:56 +00:00
Yuanfang Chen 4caeb62e51 [Fuzzer] Rename ExecuteCommandWithPopen to ExecuteCommandNon-Fushsia target will keep using popen/pclose implementation. OnFuchsia, Two-args version of `ExecuteCommand` is a simple wrapper of theone-arg version. (Hopefully) Fix D73329 build on Fuchsia. 2020-02-12 16:03:55 -08:00
Yuanfang Chen 85515c7fd5 [libFuzzer] communicate through pipe to subprocess for MinimizeCrashInput
For CleanseCrashInput, discards stdout output anyway since it is not used.

These changes are to defend against aggressive PID recycle on windows to reduce the chance of contention on files.

Using pipe instead of file also workaround the problem that when the
process is spawned by llvm-lit, the aborted process keeps a handle to the
output file such that the output file can not be removed. This will
cause random test failures.

https://devblogs.microsoft.com/oldnewthing/20110107-00/?p=11803

Reviewers: kcc, vitalybuka

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D73329
2020-02-10 16:45:10 -08:00
Jonathan Metzman 23bee0b0cf [fuzzer] Add basic support for emscripten.
Summary:
Add basic support for emscripten.

This enables libFuzzer to build (using build.sh) for emscripten and fuzz
a target compiled with
-fsanitize-coverage=inline-8bit-counters.

Basic fuzzing and bug finding work with this commit.
RSS limit and timeouts will not work because they depend on system
functions that are not implemented/widely supported in emscripten.

Reviewers: kcc, vitalybuka, hctim

Reviewed By: hctim

Subscribers: #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D71285
2019-12-12 08:56:47 -08:00
Matt Morehouse 1c8e05110c [libFuzzer] Remove lazy counters.
Summary: Lazy counters haven't improved performance for large fuzz targets.

Reviewers: kcc

Reviewed By: kcc

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D67476

llvm-svn: 373403
2019-10-01 22:49:06 +00:00
Kostya Serebryany 23482e1d07 [libFuzzer] set libFuzzer's own SEGV handler even one is already present, but call that handler from ours (unless we are unprotecting lazy counters). Call ProtectLazyCounters later, so that it runs after the initialization code in the target.
llvm-svn: 352713
2019-01-31 01:40:14 +00:00
Kostya Serebryany 8da9479e40 [libFuzzer] experimental performance optimization -lazy_counters, off by default. Posix-only for now, tested on Linux
llvm-svn: 352700
2019-01-31 00:09:43 +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
Vitaly Buka 9802089e13 libFuzzer, OpenBSD support
Summary:
- Enabling libfuzzer on OpenBSD
- OpenBSD can t support asan, msan ... the tests can t be run.

Patch by David CARLIER

Reviewers: eugenis, phosek, vitalybuka

Reviewed By: vitalybuka

Subscribers: srhines, mgorny, krytarowski, llvm-commits, #sanitizers

Differential Revision: https://reviews.llvm.org/D44877

llvm-svn: 329631
2018-04-09 22:38:26 +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 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 25d6b95679 [libFuzzer] remove a couple of reduntant includes
llvm-svn: 312848
2017-09-09 00:56:34 +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