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llvm / scudo / b465fc76f458ca2c308ba12872e220d8eee04c1e
commitb465fc76f458ca2c308ba12872e220d8eee04c1e[log] [tgz]
authorLeonard Chan <leonardchan@google.com>Tue Aug 29 19:06:03 2023 +0000
committerCopybara-Service <copybara-worker@google.com>Thu Aug 31 15:30:04 2023 -0700
treea359d352e89687f3fa877d6326fb9e83673215ac
parent502467269c8c22d960aecfc4d3c66484f1095728 [diff]
[scudo][tests] Store the allocator instance in a global rather than posix_memalign it

The combined scudo allocator object is over 4MB in size which gets created via
the posix_memalign on every test run. If the tests are sanitized with asan,
then the asan allocator will need to mmap this large object every single time a
test is run. Depending on where this is mapped, we might not be able to find a
large enough contiguous space for scudo's primary allocator to reserve an arena.
Such a case is more likely to occur on 39-bit vma for RISCV where the arena size
is roughly a quarter of the whole address space and fragmentation can be a big issue.

This helps reduce fragmentation by instead placing the allocator instance in a
global storage rather than doing an anonymous mmap.

Differential Revision: https://reviews.llvm.org/D158767

GitOrigin-RevId: 7ce67d33107fd86b7fac985a593e14298944a3a8
1 file changed
tree: a359d352e89687f3fa877d6326fb9e83673215ac
  1. benchmarks/
  2. fuzz/
  3. include/
  4. tests/
  5. tools/
  6. allocator_config.h
  7. atomic_helpers.h
  8. bytemap.h
  9. checksum.cpp
  10. checksum.h
  11. chunk.h
  12. combined.h
  13. common.cpp
  14. common.h
  15. crc32_hw.cpp
  16. flags.cpp
  17. flags.h
  18. flags.inc
  19. flags_parser.cpp
  20. flags_parser.h
  21. fuchsia.cpp
  22. fuchsia.h
  23. internal_defs.h
  24. LICENSE.TXT
  25. linux.cpp
  26. linux.h
  27. list.h
  28. local_cache.h
  29. mem_map.cpp
  30. mem_map.h
  31. mem_map_base.h
  32. mem_map_fuchsia.cpp
  33. mem_map_fuchsia.h
  34. mem_map_linux.cpp
  35. mem_map_linux.h
  36. memtag.h
  37. mutex.h
  38. options.h
  39. platform.h
  40. primary32.h
  41. primary64.h
  42. quarantine.h
  43. release.cpp
  44. release.h
  45. report.cpp
  46. report.h
  47. secondary.h
  48. size_class_map.h
  49. stack_depot.h
  50. stats.h
  51. string_utils.cpp
  52. string_utils.h
  53. thread_annotations.h
  54. timing.cpp
  55. timing.h
  56. trusty.cpp
  57. trusty.h
  58. tsd.h
  59. tsd_exclusive.h
  60. tsd_shared.h
  61. vector.h
  62. wrappers_c.cpp
  63. wrappers_c.h
  64. wrappers_c.inc
  65. wrappers_c_bionic.cpp
  66. wrappers_c_checks.h
  67. wrappers_cpp.cpp