зеркало из https://github.com/mozilla/gecko-dev.git
69 строки
3.1 KiB
C++
69 строки
3.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
|
|
* You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "mozilla/Attributes.h"
|
|
|
|
#ifndef _MSC_VER // Not supported by clang-cl yet
|
|
|
|
// When running with AddressSanitizer, we need to explicitly set some
|
|
// options specific to our codebase to prevent errors during runtime.
|
|
// To override these, set the ASAN_OPTIONS environment variable.
|
|
//
|
|
// Currently, these are:
|
|
//
|
|
// allow_user_segv_handler=1 - Tell ASan to allow our code to use its
|
|
// own SIGSEGV handlers. This is required by ASM.js internally.
|
|
//
|
|
// alloc_dealloc_mismatch=0 - Disable alloc-dealloc mismatch checking
|
|
// in ASan. This is required because we define our own new/delete
|
|
// operators that are backed by malloc/free. If one of them gets inlined
|
|
// while the other doesn't, ASan will report false positives.
|
|
//
|
|
// detect_leaks=0 - Disable LeakSanitizer. This is required because
|
|
// otherwise leak checking will be enabled for various building and
|
|
// testing executables where we don't care much about leaks. Enabling
|
|
// this will also likely require setting LSAN_OPTIONS with a suppression
|
|
// file, as in build/sanitizers/lsan_suppressions.txt.
|
|
//
|
|
// allocator_may_return_null=1 - Tell ASan to return NULL when an allocation
|
|
// fails instead of aborting the program. This allows us to handle failing
|
|
// allocations the same way we would handle them with a regular allocator and
|
|
// also uncovers potential bugs that might occur in these situations.
|
|
//
|
|
// max_malloc_fill_size - Tell ASan to initialize memory to a certain value
|
|
// when it is allocated. This option specifies the maximum allocation size
|
|
// for which ASan should still initialize the memory. The value we specify
|
|
// here is exactly 256MiB.
|
|
//
|
|
// max_free_fill_size - Similar to max_malloc_fill_size, tell ASan to
|
|
// overwrite memory with a certain value when it is freed. Again, the value
|
|
// here specifies the maximum allocation size, larger allocations will
|
|
// skipped.
|
|
//
|
|
// malloc_fill_byte / free_fill_byte - These values specify the byte values
|
|
// used to initialize/overwrite memory in conjunction with the previous
|
|
// options max_malloc_fill_size and max_free_fill_size. The values used here
|
|
// are 0xe4 and 0xe5 to match the kAllocPoison and kAllocJunk constants used
|
|
// by mozjemalloc.
|
|
//
|
|
// malloc_context_size - This value specifies how many stack frames are
|
|
// stored for each malloc and free call. Since Firefox can have lots of deep
|
|
// stacks with allocations, we limit the default size here further to save
|
|
// some memory.
|
|
//
|
|
extern "C" MOZ_ASAN_BLACKLIST
|
|
const char* __asan_default_options() {
|
|
return "allow_user_segv_handler=1:alloc_dealloc_mismatch=0:detect_leaks=0"
|
|
#ifdef MOZ_ASAN_REPORTER
|
|
":malloc_context_size=20"
|
|
#endif
|
|
":max_free_fill_size=268435456:max_malloc_fill_size=268435456"
|
|
":malloc_fill_byte=228:free_fill_byte=229"
|
|
":handle_sigill=1"
|
|
":allocator_may_return_null=1";
|
|
}
|
|
|
|
#endif
|