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llvm / scudo / 84ca9c87144a216c3dce18f13ccb4a0c039a6d66
commit84ca9c87144a216c3dce18f13ccb4a0c039a6d66[log] [tgz]
authorEvgenii Stepanov <eugeni.stepanov@gmail.com>Mon Dec 04 13:45:37 2023 -0800
committerCopybara-Service <copybara-worker@google.com>Mon Dec 04 13:48:05 2023 -0800
tree4018385ee66938d8d3d18196abe99d29c4872cec
parentf3df9cb3f8f32af7094eac91281ca4876e0389a5 [diff]
Do not initialize the allocator on free(nullptr). (#74366)

free(nullptr) is guaranteed by ISO and POSIX to be a no-op, we should not pay for the overhead of maybeInit() in this case.

Additionally, Bionic calls free(nullptr) before the allocator settings are finalized.
Scudo should not run allocator initialization at that time. Doing so
causes various bad things to happen, like mapping primary regions with
the wrong PROT_MTE setting.

GitOrigin-RevId: 54c30953b9374e3bcc1c79b53a231e4b53ceafed
1 file changed
tree: 4018385ee66938d8d3d18196abe99d29c4872cec
  1. benchmarks/
  2. fuzz/
  3. include/
  4. tests/
  5. tools/
  6. allocator_common.h
  7. allocator_config.h
  8. atomic_helpers.h
  9. bytemap.h
  10. checksum.cpp
  11. checksum.h
  12. chunk.h
  13. combined.h
  14. common.cpp
  15. common.h
  16. condition_variable.h
  17. condition_variable_base.h
  18. condition_variable_linux.cpp
  19. condition_variable_linux.h
  20. crc32_hw.cpp
  21. flags.cpp
  22. flags.h
  23. flags.inc
  24. flags_parser.cpp
  25. flags_parser.h
  26. fuchsia.cpp
  27. fuchsia.h
  28. internal_defs.h
  29. LICENSE.TXT
  30. linux.cpp
  31. linux.h
  32. list.h
  33. local_cache.h
  34. mem_map.cpp
  35. mem_map.h
  36. mem_map_base.h
  37. mem_map_fuchsia.cpp
  38. mem_map_fuchsia.h
  39. mem_map_linux.cpp
  40. mem_map_linux.h
  41. memtag.h
  42. mutex.h
  43. options.h
  44. platform.h
  45. primary32.h
  46. primary64.h
  47. quarantine.h
  48. release.cpp
  49. release.h
  50. report.cpp
  51. report.h
  52. report_linux.cpp
  53. report_linux.h
  54. secondary.h
  55. size_class_map.h
  56. stack_depot.h
  57. stats.h
  58. string_utils.cpp
  59. string_utils.h
  60. thread_annotations.h
  61. timing.cpp
  62. timing.h
  63. trusty.cpp
  64. trusty.h
  65. tsd.h
  66. tsd_exclusive.h
  67. tsd_shared.h
  68. vector.h
  69. wrappers_c.cpp
  70. wrappers_c.h
  71. wrappers_c.inc
  72. wrappers_c_bionic.cpp
  73. wrappers_c_checks.h
  74. wrappers_cpp.cpp