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llvm / libfuzzer / cd00742ab781a90d906107db25790d57302a4510
commitcd00742ab781a90d906107db25790d57302a4510[log] [tgz]
authorMax Moroz <mmoroz@chromium.org>Fri Jun 14 19:34:11 2019 +0000
committerCopybara-Service <copybara-worker@google.com>Thu Mar 25 23:19:56 2021 -0700
tree7f782a96e3d4a1f7bfb3b6af30a02d6528a458bf
parent7d0a6f49d83c63ad2fe8470d84ecf812be1db8ed [diff]
[libFuzzer] Disable len_control by default if LLVMFuzzerCustomMutator is used.

Summary:
Some custom mutators may not peform well when size restriction is
enforced by len_control. Because of that, it's safer to disable len_control
by default in such cases, but still allow users to enable it manually.
Bug example: https://bugs.chromium.org/p/chromium/issues/detail?id=919530.

Tested manually with LPM-based and regular fuzz targets.

Reviewers: kcc, vitalybuka, metzman

Reviewed By: kcc, metzman

Subscribers: delcypher, #sanitizers, llvm-commits

Tags: #llvm, #sanitizers

Differential Revision: https://reviews.llvm.org/D63334

llvm-svn: 363443
GitOrigin-RevId: 0784e01a98a01d30474655702051e9f4542ccc31
2 files changed
tree: 7f782a96e3d4a1f7bfb3b6af30a02d6528a458bf
  1. afl/
  2. dataflow/
  3. scripts/
  4. standalone/
  5. tests/
  6. utils/
  7. build.sh
  8. FuzzerBuiltins.h
  9. FuzzerBuiltinsMsvc.h
  10. FuzzerCommand.h
  11. FuzzerCorpus.h
  12. FuzzerCrossOver.cpp
  13. FuzzerDataFlowTrace.cpp
  14. FuzzerDataFlowTrace.h
  15. FuzzerDefs.h
  16. FuzzerDictionary.h
  17. FuzzerDriver.cpp
  18. FuzzerExtFunctions.def
  19. FuzzerExtFunctions.h
  20. FuzzerExtFunctionsDlsym.cpp
  21. FuzzerExtFunctionsWeak.cpp
  22. FuzzerExtFunctionsWindows.cpp
  23. FuzzerExtraCounters.cpp
  24. FuzzerFlags.def
  25. FuzzerFork.cpp
  26. FuzzerFork.h
  27. FuzzerInterface.h
  28. FuzzerInternal.h
  29. FuzzerIO.cpp
  30. FuzzerIO.h
  31. FuzzerIOPosix.cpp
  32. FuzzerIOWindows.cpp
  33. FuzzerLoop.cpp
  34. FuzzerMain.cpp
  35. FuzzerMerge.cpp
  36. FuzzerMerge.h
  37. FuzzerMutate.cpp
  38. FuzzerMutate.h
  39. FuzzerOptions.h
  40. FuzzerRandom.h
  41. FuzzerSHA1.cpp
  42. FuzzerSHA1.h
  43. FuzzerTracePC.cpp
  44. FuzzerTracePC.h
  45. FuzzerUtil.cpp
  46. FuzzerUtil.h
  47. FuzzerUtilDarwin.cpp
  48. FuzzerUtilFuchsia.cpp
  49. FuzzerUtilLinux.cpp
  50. FuzzerUtilPosix.cpp
  51. FuzzerUtilWindows.cpp
  52. FuzzerValueBitMap.h
  53. LICENSE.TXT
  54. README.txt