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