Function get_asan_options

src/clusterfuzz/_internal/system/environment.py:145–220

Generates default ASAN options.

(redzone_size, malloc_context_size, quarantine_size_mb,
                     bot_platform, leaks, disable_ubsan)

def get_asan_options(redzone_size, malloc_context_size, quarantine_size_mb,
                     bot_platform, leaks, disable_ubsan):
  """Generates default ASAN options."""
  asan_options = {}

  # Default options needed for all cases.
  asan_options['alloc_dealloc_mismatch'] = 0
  asan_options['print_scariness'] = 1
  asan_options['strict_memcmp'] = 0

  # Set provided redzone size.
  if redzone_size:
    asan_options['redzone'] = redzone_size

    # This value is used in determining whether to report OOM crashes or not.
    set_value('REDZONE', redzone_size)

  # Set maximum number of stack frames to report.
  if malloc_context_size:
    asan_options['malloc_context_size'] = malloc_context_size

  # Set quarantine size.
  if quarantine_size_mb:
    asan_options['quarantine_size_mb'] = quarantine_size_mb

  # Test for leaks if this is an LSan-enabled job type.
  if get_value('LSAN') and leaks and not get_value('USE_EXTRA_SANITIZERS'):
    lsan_options = join_memory_tool_options(get_lsan_options())
    set_value('LSAN_OPTIONS', lsan_options)
    asan_options['detect_leaks'] = 1
  else:
    remove_key('LSAN_OPTIONS')
    asan_options['detect_leaks'] = 0

  # FIXME: Support container overflow on Android.
  if is_android(bot_platform):
    asan_options['detect_container_overflow'] = 0

  # Enable stack use-after-return.
  asan_options['detect_stack_use_after_return'] = 1

  # Other less important default options for all cases.
  asan_options.update({
      'allocator_may_return_null': 1,
      'allow_user_segv_handler': 0,
      'check_malloc_usable_size': 0,
      'detect_odr_violation': 0,
      'fast_unwind_on_fatal': 1,
      'print_suppressions': 0,
  })

  # Add common sanitizer options.
  asan_options.update(COMMON_SANITIZER_OPTIONS)

  # FIXME: For Windows, rely on online symbolization since llvm-symbolizer.exe
  # in build archive does not work.
  asan_options['symbolize'] = int(bot_platform == 'WINDOWS')