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20 Commits

Author SHA1 Message Date
Kostya Serebryany
db88fc56b9 [libFuzzer] implement a better queue for the fork mode. Add an internal flag -stop_file to allow graceful shutdown of fuzzing. Enhance the logging in the fork mode 
llvm-svn: 363470
 2019-06-14 22:56:50 +00:00
Kostya Serebryany
3f39123d15 [libFuzzer] simplify the DFT trace collection using the new faster DFSan mode that traces up to 16 labels at a time and never runs out of labels. Second attempt. This time with a fix for windows (putenv instead of setenv)) 
llvm-svn: 363445
 2019-06-14 19:54:32 +00:00
Hans Wennborg
9bc707c0e5 Revert r363326 "[libFuzzer] simplify the DFT trace collection using the new faster DFSan mode that traces up to 16 labels at a time and never runs out of labels." 
It broke the Windows build:

C:\b\s\w\ir\cache\builder\src\third_party\llvm\compiler-rt\lib\fuzzer\FuzzerDataFlowTrace.cpp(243): error C3861: 'setenv': identifier not found

This also reverts the follow-up r363327.

llvm-svn: 363358
 2019-06-14 07:32:22 +00:00
Kostya Serebryany
2fa83cb7ee [libFuzzer] simplify the DFT trace collection using the new faster DFSan mode that traces up to 16 labels at a time and never runs out of labels. 
llvm-svn: 363326
 2019-06-13 21:17:49 +00:00
Kostya Serebryany
b7cc3d9953 [libFuzzer] automatically collect the data flow trace (DFT) in the fork mode if -collect_data_flow= is given 
llvm-svn: 361448
 2019-05-23 00:22:46 +00:00
Jonathan Metzman
f3ee97731e [libFuzzer] Replace -seed_corpus to better support fork mode on Win 
Summary:
Pass seed corpus list in a file to get around argument length limits on Windows.
This limit was preventing many uses of fork mode on Windows.

Reviewers: kcc, morehouse

Reviewed By: kcc

Subscribers: #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D60980

llvm-svn: 359610
 2019-04-30 20:56:18 +00:00
Kostya Serebryany
bbb8522bde [libFuzzer] in fork mode, make sure the child stats are always collected. This should fix the flakiness in fork-ubsan.test 
llvm-svn: 358726
 2019-04-19 01:39:14 +00:00
Matt Morehouse
57213d839a [libFuzzer] Remove tautological compare. 
llvm-svn: 358510
 2019-04-16 17:38:19 +00:00
Kostya Serebryany
5e67abd91f [libFuzzer] speedup the merge step in the fork mode by merging only the files that have unique features. 
llvm-svn: 358320
 2019-04-13 01:57:33 +00:00
Kostya Serebryany
65132e2118 [libFuzzer] support -runs=N in the fork mode. Make sure we see one-line reports from ubsan in the fork mode. Test both 
llvm-svn: 358306
 2019-04-12 20:20:57 +00:00
Jonathan Metzman
518514e81d [libFuzzer][Windows] Port fork mode to Windows 
Summary:
Port libFuzzer's fork mode to Windows.
Implement Windows versions of MkDir, RmDir, and IterateDirRecursive to do this.
Don't print error messages under new normal uses of FileSize (on a non-existent file).
Implement portable way of piping output to /dev/null.
Fix test for Windows and comment fork-sigusr.test on why it won't be ported to Win.

Reviewers: zturner

Reviewed By: zturner

Subscribers: kcc, zturner, jdoerfert, #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D58513

llvm-svn: 355019
 2019-02-27 19:27:16 +00:00
Kostya Serebryany
312af158b0 [libFuzzer] fork mode: try harder to cleanup after itself 
llvm-svn: 354186
 2019-02-16 00:14:16 +00:00
Kostya Serebryany
9982ee5472 [libFuzzer] form mode: add -ignore_crashes flag, honor the max_total_time flag, print the number of ooms/timeouts/crashes, fix a typo 
llvm-svn: 354175
 2019-02-15 21:51:15 +00:00
Kostya Serebryany
77cbc62544 [libFuzzer] print new functions as they are discovered in the fork mode 
llvm-svn: 354092
 2019-02-15 01:22:00 +00:00
Kostya Serebryany
8c2791469d [libFuzzer] when doing the merge, keep track of the coveraged edges, not just features 
llvm-svn: 354087
 2019-02-15 00:08:16 +00:00
Kostya Serebryany
8e918d6ead [libFuzzer] better stats for the fork mode 
llvm-svn: 354061
 2019-02-14 21:09:32 +00:00
Kostya Serebryany
debf0af71d [libFuzzer] trying to fix the bot (can't reproduce the build failure locally) 
llvm-svn: 354000
 2019-02-14 01:11:29 +00:00
Kostya Serebryany
60c5ded269 [libFuzzer] add threads to the fork mode: now you can pass -fork=N to run N concurrent workers. Fork mode is still work-in-progress. 
llvm-svn: 353997
 2019-02-14 00:25:43 +00:00
Kostya Serebryany
d085748484 [libFuzzer] a bit of refactoring of the fork mode 
llvm-svn: 353910
 2019-02-13 04:04:45 +00:00
Kostya Serebryany
5c08e811de [libFuzzer] move the implementation of the fork mode into a separate file 
llvm-svn: 353891
 2019-02-12 22:48:55 +00:00