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llvm / libfuzzer / b0e1903edc69e754014843cf127c57fe352e33d5
commitb0e1903edc69e754014843cf127c57fe352e33d5[log] [tgz]
authorMarco Vanotti <mvanotti@google.com>Tue Oct 29 15:38:51 2019 -0700
committerCopybara-Service <copybara-worker@google.com>Thu Mar 25 23:20:32 2021 -0700
treef25767799375592bc3ec5a4d40d470766ec759e7
parent1d799df60418af96cc6e04df439a4d8585847821 [diff]
[libFuzzer] don't use /dev/null for DiscardOuput in Fuchsia.

Summary:

This commit moves the `DiscardOutput` function in FuzzerIO to
FuzzerUtil, so fuchsia can have its own specialized version.

In fuchsia, accessing `/dev/null` is not supported, and there's nothing
similar to a file that discards everything that is written to it. The
way of doing something similar in fuchsia is by using `fdio_null_create`
and binding that to a file descriptor with `fdio_bind_to_fd`.

This change should fix one of the issues with the `-close_fd_mask` flag
in libfuzzer, in which closing stdout was not working due to
`fopen("/dev/null", "w")` returning `NULL`.

Reviewers: kcc, aarongreen

Subscribers: #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D69593

GitOrigin-RevId: e5b603a4c32044932c3a1d26ccbc7d43fec939d5
8 files changed
tree: f25767799375592bc3ec5a4d40d470766ec759e7
  1. afl/
  2. dataflow/
  3. scripts/
  4. standalone/
  5. tests/
  6. build.sh
  7. FuzzedDataProvider.h
  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