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llvm / scudo / f3df9cb3f8f32af7094eac91281ca4876e0389a5
commitf3df9cb3f8f32af7094eac91281ca4876e0389a5[log] [tgz]
authorChiaHungDuan <chiahungduan@google.com>Sat Dec 02 06:41:43 2023 +0800
committerCopybara-Service <copybara-worker@google.com>Fri Dec 01 14:45:16 2023 -0800
tree47b19dd1d8e4785f90474780c9b15619a9b7b215
parentec704e388dd16b393ebed187d47227e2436252d3 [diff]
[scudo] Fix realloc hooks behavior (#74149)

`realloc` may involve both allocation and deallocation. Given that the
reporting the events is not atomic and which may lead the hook user to a
false case that the double-use pattern happens, we always report the old
pointer is released and report the new allocation afterward (even it's
the same pointer).

This also fixes that we didn't report the new size when it doesn't need
to allocate a new space.

GitOrigin-RevId: 75867f8e4a9a06df3b2cafe662d13ee78bb7fc67
4 files changed
tree: 47b19dd1d8e4785f90474780c9b15619a9b7b215
  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