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llvm / scudo / bb6fbadccd60a18b6df071e0ff53e98fd2593516
commitbb6fbadccd60a18b6df071e0ff53e98fd2593516[log] [tgz]
authorPeter Collingbourne <peter@pcc.me.uk>Wed Dec 04 17:28:45 2019 -0800
committerCopybara-Service <copybara-worker@google.com>Thu Aug 27 23:56:26 2020 -0700
treede7ddbddcd8650d12f50cc5ca381bc46bef6afde
parent74db8e49f7241b5216d92a1c1497eb1255e8b36d [diff]
scudo: Tweak how we align UserPtr. NFCI.

Instead of testing whether the pointer is aligned, just align it
unconditionally and compare it to the original pointer.

This moves the computation of UserPtr up to before we start preparing the
header, so that the memory tagging code will be able to read the original
header containing the bounds of the previous allocation before it gets
potentially clobbered by the pointer realignment code.

Differential Revision: https://reviews.llvm.org/D71292

GitOrigin-RevId: 9fbfdd2bfe42a6d0a8e680c64a968e9cfc065fd3
1 file changed
tree: de7ddbddcd8650d12f50cc5ca381bc46bef6afde
  1. benchmarks/
  2. tests/
  3. allocator_config.h
  4. atomic_helpers.h
  5. bytemap.h
  6. checksum.cpp
  7. checksum.h
  8. chunk.h
  9. combined.h
  10. common.cpp
  11. common.h
  12. crc32_hw.cpp
  13. flags.cpp
  14. flags.h
  15. flags.inc
  16. flags_parser.cpp
  17. flags_parser.h
  18. fuchsia.cpp
  19. fuchsia.h
  20. interface.h
  21. internal_defs.h
  22. LICENSE.TXT
  23. linux.cpp
  24. linux.h
  25. list.h
  26. local_cache.h
  27. mutex.h
  28. platform.h
  29. primary32.h
  30. primary64.h
  31. quarantine.h
  32. release.h
  33. report.cpp
  34. report.h
  35. secondary.h
  36. size_class_map.h
  37. stats.h
  38. string_utils.cpp
  39. string_utils.h
  40. tsd.h
  41. tsd_exclusive.h
  42. tsd_shared.h
  43. vector.h
  44. wrappers_c.cpp
  45. wrappers_c.h
  46. wrappers_c.inc
  47. wrappers_c_bionic.cpp
  48. wrappers_c_checks.h
  49. wrappers_cpp.cpp