163 lines
7.9 KiB
C++
163 lines
7.9 KiB
C++
//===-- asan_flags.inc ------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// ASan runtime flags.
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//
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//===----------------------------------------------------------------------===//
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#ifndef ASAN_FLAG
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# error "Define ASAN_FLAG prior to including this file!"
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#endif
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// ASAN_FLAG(Type, Name, DefaultValue, Description)
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// See COMMON_FLAG in sanitizer_flags.inc for more details.
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ASAN_FLAG(int, quarantine_size, -1,
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"Deprecated, please use quarantine_size_mb.")
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ASAN_FLAG(int, quarantine_size_mb, -1,
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"Size (in Mb) of quarantine used to detect use-after-free "
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"errors. Lower value may reduce memory usage but increase the "
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"chance of false negatives.")
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ASAN_FLAG(int, thread_local_quarantine_size_kb, -1,
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"Size (in Kb) of thread local quarantine used to detect "
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"use-after-free errors. Lower value may reduce memory usage but "
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"increase the chance of false negatives. It is not advised to go "
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"lower than 64Kb, otherwise frequent transfers to global quarantine "
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"might affect performance.")
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ASAN_FLAG(int, redzone, 16,
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"Minimal size (in bytes) of redzones around heap objects. "
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"Requirement: redzone >= 16, is a power of two.")
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ASAN_FLAG(int, max_redzone, 2048,
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"Maximal size (in bytes) of redzones around heap objects.")
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ASAN_FLAG(
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bool, debug, false,
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"If set, prints some debugging information and does additional checks.")
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ASAN_FLAG(
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int, report_globals, 1,
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"Controls the way to handle globals (0 - don't detect buffer overflow on "
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"globals, 1 - detect buffer overflow, 2 - print data about registered "
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"globals).")
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ASAN_FLAG(bool, check_initialization_order, false,
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"If set, attempts to catch initialization order issues.")
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ASAN_FLAG(
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bool, replace_str, true,
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"If set, uses custom wrappers and replacements for libc string functions "
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"to find more errors.")
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ASAN_FLAG(bool, replace_intrin, true,
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"If set, uses custom wrappers for memset/memcpy/memmove intrinsics.")
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ASAN_FLAG(bool, detect_stack_use_after_return, false,
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"Enables stack-use-after-return checking at run-time.")
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ASAN_FLAG(int, min_uar_stack_size_log, 16, // We can't do smaller anyway.
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"Minimum fake stack size log.")
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ASAN_FLAG(int, max_uar_stack_size_log,
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20, // 1Mb per size class, i.e. ~11Mb per thread
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"Maximum fake stack size log.")
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ASAN_FLAG(bool, uar_noreserve, false,
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"Use mmap with 'noreserve' flag to allocate fake stack.")
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ASAN_FLAG(
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int, max_malloc_fill_size, 0x1000, // By default, fill only the first 4K.
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"ASan allocator flag. max_malloc_fill_size is the maximal amount of "
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"bytes that will be filled with malloc_fill_byte on malloc.")
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ASAN_FLAG(
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int, max_free_fill_size, 0,
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"ASan allocator flag. max_free_fill_size is the maximal amount of "
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"bytes that will be filled with free_fill_byte during free.")
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ASAN_FLAG(int, malloc_fill_byte, 0xbe,
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"Value used to fill the newly allocated memory.")
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ASAN_FLAG(int, free_fill_byte, 0x55,
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"Value used to fill deallocated memory.")
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ASAN_FLAG(bool, allow_user_poisoning, true,
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"If set, user may manually mark memory regions as poisoned or "
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"unpoisoned.")
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ASAN_FLAG(
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int, sleep_before_dying, 0,
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"Number of seconds to sleep between printing an error report and "
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"terminating the program. Useful for debugging purposes (e.g. when one "
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"needs to attach gdb).")
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ASAN_FLAG(
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int, sleep_after_init, 0,
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"Number of seconds to sleep after AddressSanitizer is initialized. "
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"Useful for debugging purposes (e.g. when one needs to attach gdb).")
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ASAN_FLAG(bool, check_malloc_usable_size, true,
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"Allows the users to work around the bug in Nvidia drivers prior to "
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"295.*.")
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ASAN_FLAG(bool, unmap_shadow_on_exit, false,
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"If set, explicitly unmaps the (huge) shadow at exit.")
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ASAN_FLAG(bool, protect_shadow_gap, true, "If set, mprotect the shadow gap")
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ASAN_FLAG(bool, print_stats, false,
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"Print various statistics after printing an error message or if "
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"atexit=1.")
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ASAN_FLAG(bool, print_legend, true, "Print the legend for the shadow bytes.")
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ASAN_FLAG(bool, print_scariness, false,
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"Print the scariness score. Experimental.")
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ASAN_FLAG(bool, atexit, false,
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"If set, prints ASan exit stats even after program terminates "
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"successfully.")
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ASAN_FLAG(
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bool, print_full_thread_history, true,
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"If set, prints thread creation stacks for the threads involved in the "
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"report and their ancestors up to the main thread.")
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ASAN_FLAG(
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bool, poison_heap, true,
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"Poison (or not) the heap memory on [de]allocation. Zero value is useful "
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"for benchmarking the allocator or instrumentator.")
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ASAN_FLAG(bool, poison_partial, true,
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"If true, poison partially addressable 8-byte aligned words "
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"(default=true). This flag affects heap and global buffers, but not "
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"stack buffers.")
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ASAN_FLAG(bool, poison_array_cookie, true,
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"Poison (or not) the array cookie after operator new[].")
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// Turn off alloc/dealloc mismatch checker on Mac and Windows for now.
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// https://github.com/google/sanitizers/issues/131
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// https://github.com/google/sanitizers/issues/309
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// TODO(glider,timurrrr): Fix known issues and enable this back.
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ASAN_FLAG(bool, alloc_dealloc_mismatch,
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!SANITIZER_MAC && !SANITIZER_WINDOWS && !SANITIZER_ANDROID,
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"Report errors on malloc/delete, new/free, new/delete[], etc.")
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ASAN_FLAG(bool, new_delete_type_mismatch, true,
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"Report errors on mismatch between size of new and delete.")
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ASAN_FLAG(
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bool, strict_init_order, false,
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"If true, assume that dynamic initializers can never access globals from "
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"other modules, even if the latter are already initialized.")
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ASAN_FLAG(
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bool, start_deactivated, false,
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"If true, ASan tweaks a bunch of other flags (quarantine, redzone, heap "
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"poisoning) to reduce memory consumption as much as possible, and "
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"restores them to original values when the first instrumented module is "
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"loaded into the process. This is mainly intended to be used on "
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"Android. ")
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ASAN_FLAG(
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int, detect_invalid_pointer_pairs, 0,
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"If >= 2, detect operations like <, <=, >, >= and - on invalid pointer "
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"pairs (e.g. when pointers belong to different objects); "
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"If == 1, detect invalid operations only when both pointers are non-null.")
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ASAN_FLAG(bool, detect_container_overflow, true,
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"If true, honor the container overflow annotations. See "
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"https://github.com/google/sanitizers/wiki/"
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"AddressSanitizerContainerOverflow")
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ASAN_FLAG(int, detect_odr_violation, 2,
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"If >=2, detect violation of One-Definition-Rule (ODR); "
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"If ==1, detect ODR-violation only if the two variables "
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"have different sizes")
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ASAN_FLAG(const char *, suppressions, "", "Suppressions file name.")
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ASAN_FLAG(bool, halt_on_error, true,
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"Crash the program after printing the first error report "
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"(WARNING: USE AT YOUR OWN RISK!)")
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ASAN_FLAG(bool, allocator_frees_and_returns_null_on_realloc_zero, true,
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"realloc(p, 0) is equivalent to free(p) by default (Same as the "
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"POSIX standard). If set to false, realloc(p, 0) will return a "
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"pointer to an allocated space which can not be used.")
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ASAN_FLAG(bool, verify_asan_link_order, true,
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"Check position of ASan runtime in library list (needs to be disabled"
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" when other library has to be preloaded system-wide)")
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ASAN_FLAG(
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bool, windows_hook_rtl_allocators, false,
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"(Windows only) enable hooking of Rtl(Allocate|Free|Size|ReAllocate)Heap.")
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