1 //===-- asan_flags.inc ------------------------------------------*- C++ -*-===//
3 // This file is distributed under the University of Illinois Open Source
4 // License. See LICENSE.TXT for details.
6 //===----------------------------------------------------------------------===//
10 //===----------------------------------------------------------------------===//
12 # error "Define ASAN_FLAG prior to including this file!"
15 // ASAN_FLAG(Type, Name, DefaultValue, Description)
16 // See COMMON_FLAG in sanitizer_flags.inc for more details.
18 ASAN_FLAG(int, quarantine_size, -1,
19 "Deprecated, please use quarantine_size_mb.")
20 ASAN_FLAG(int, quarantine_size_mb, -1,
21 "Size (in Mb) of quarantine used to detect use-after-free "
22 "errors. Lower value may reduce memory usage but increase the "
23 "chance of false negatives.")
24 ASAN_FLAG(int, thread_local_quarantine_size_kb, -1,
25 "Size (in Kb) of thread local quarantine used to detect "
26 "use-after-free errors. Lower value may reduce memory usage but "
27 "increase the chance of false negatives. It is not advised to go "
28 "lower than 64Kb, otherwise frequent transfers to global quarantine "
29 "might affect performance.")
30 ASAN_FLAG(int, redzone, 16,
31 "Minimal size (in bytes) of redzones around heap objects. "
32 "Requirement: redzone >= 16, is a power of two.")
33 ASAN_FLAG(int, max_redzone, 2048,
34 "Maximal size (in bytes) of redzones around heap objects.")
37 "If set, prints some debugging information and does additional checks.")
39 int, report_globals, 1,
40 "Controls the way to handle globals (0 - don't detect buffer overflow on "
41 "globals, 1 - detect buffer overflow, 2 - print data about registered "
43 ASAN_FLAG(bool, check_initialization_order, false,
44 "If set, attempts to catch initialization order issues.")
46 bool, replace_str, true,
47 "If set, uses custom wrappers and replacements for libc string functions "
48 "to find more errors.")
49 ASAN_FLAG(bool, replace_intrin, true,
50 "If set, uses custom wrappers for memset/memcpy/memmove intrinsics.")
51 ASAN_FLAG(bool, detect_stack_use_after_return, false,
52 "Enables stack-use-after-return checking at run-time.")
53 ASAN_FLAG(int, min_uar_stack_size_log, 16, // We can't do smaller anyway.
54 "Minimum fake stack size log.")
55 ASAN_FLAG(int, max_uar_stack_size_log,
56 20, // 1Mb per size class, i.e. ~11Mb per thread
57 "Maximum fake stack size log.")
58 ASAN_FLAG(bool, uar_noreserve, false,
59 "Use mmap with 'noreserve' flag to allocate fake stack.")
61 int, max_malloc_fill_size, 0x1000, // By default, fill only the first 4K.
62 "ASan allocator flag. max_malloc_fill_size is the maximal amount of "
63 "bytes that will be filled with malloc_fill_byte on malloc.")
65 int, max_free_fill_size, 0,
66 "ASan allocator flag. max_free_fill_size is the maximal amount of "
67 "bytes that will be filled with free_fill_byte during free.")
68 ASAN_FLAG(int, malloc_fill_byte, 0xbe,
69 "Value used to fill the newly allocated memory.")
70 ASAN_FLAG(int, free_fill_byte, 0x55,
71 "Value used to fill deallocated memory.")
72 ASAN_FLAG(bool, allow_user_poisoning, true,
73 "If set, user may manually mark memory regions as poisoned or "
76 int, sleep_before_dying, 0,
77 "Number of seconds to sleep between printing an error report and "
78 "terminating the program. Useful for debugging purposes (e.g. when one "
79 "needs to attach gdb).")
81 int, sleep_after_init, 0,
82 "Number of seconds to sleep after AddressSanitizer is initialized. "
83 "Useful for debugging purposes (e.g. when one needs to attach gdb).")
84 ASAN_FLAG(bool, check_malloc_usable_size, true,
85 "Allows the users to work around the bug in Nvidia drivers prior to "
87 ASAN_FLAG(bool, unmap_shadow_on_exit, false,
88 "If set, explicitly unmaps the (huge) shadow at exit.")
89 ASAN_FLAG(bool, protect_shadow_gap, true, "If set, mprotect the shadow gap")
90 ASAN_FLAG(bool, print_stats, false,
91 "Print various statistics after printing an error message or if "
93 ASAN_FLAG(bool, print_legend, true, "Print the legend for the shadow bytes.")
94 ASAN_FLAG(bool, print_scariness, false,
95 "Print the scariness score. Experimental.")
96 ASAN_FLAG(bool, atexit, false,
97 "If set, prints ASan exit stats even after program terminates "
100 bool, print_full_thread_history, true,
101 "If set, prints thread creation stacks for the threads involved in the "
102 "report and their ancestors up to the main thread.")
104 bool, poison_heap, true,
105 "Poison (or not) the heap memory on [de]allocation. Zero value is useful "
106 "for benchmarking the allocator or instrumentator.")
107 ASAN_FLAG(bool, poison_partial, true,
108 "If true, poison partially addressable 8-byte aligned words "
109 "(default=true). This flag affects heap and global buffers, but not "
111 ASAN_FLAG(bool, poison_array_cookie, true,
112 "Poison (or not) the array cookie after operator new[].")
114 // Turn off alloc/dealloc mismatch checker on Mac and Windows for now.
115 // https://github.com/google/sanitizers/issues/131
116 // https://github.com/google/sanitizers/issues/309
117 // TODO(glider,timurrrr): Fix known issues and enable this back.
118 ASAN_FLAG(bool, alloc_dealloc_mismatch,
119 !SANITIZER_MAC && !SANITIZER_WINDOWS && !SANITIZER_ANDROID,
120 "Report errors on malloc/delete, new/free, new/delete[], etc.")
122 ASAN_FLAG(bool, new_delete_type_mismatch, true,
123 "Report errors on mismatch between size of new and delete.")
125 bool, strict_init_order, false,
126 "If true, assume that dynamic initializers can never access globals from "
127 "other modules, even if the latter are already initialized.")
129 bool, start_deactivated, false,
130 "If true, ASan tweaks a bunch of other flags (quarantine, redzone, heap "
131 "poisoning) to reduce memory consumption as much as possible, and "
132 "restores them to original values when the first instrumented module is "
133 "loaded into the process. This is mainly intended to be used on "
136 int, detect_invalid_pointer_pairs, 0,
137 "If non-zero, try to detect operations like <, <=, >, >= and - on "
138 "invalid pointer pairs (e.g. when pointers belong to different objects). "
139 "The bigger the value the harder we try.")
141 bool, detect_container_overflow, true,
142 "If true, honor the container overflow annotations. See "
143 "https://github.com/google/sanitizers/wiki/AddressSanitizerContainerOverflow")
144 ASAN_FLAG(int, detect_odr_violation, 2,
145 "If >=2, detect violation of One-Definition-Rule (ODR); "
146 "If ==1, detect ODR-violation only if the two variables "
147 "have different sizes")
148 ASAN_FLAG(const char *, suppressions, "", "Suppressions file name.")
149 ASAN_FLAG(bool, halt_on_error, true,
150 "Crash the program after printing the first error report "
151 "(WARNING: USE AT YOUR OWN RISK!)")
152 ASAN_FLAG(bool, use_odr_indicator, false,
153 "Use special ODR indicator symbol for ODR violation detection")
154 ASAN_FLAG(bool, allocator_frees_and_returns_null_on_realloc_zero, true,
155 "realloc(p, 0) is equivalent to free(p) by default (Same as the "
156 "POSIX standard). If set to false, realloc(p, 0) will return a "
157 "pointer to an allocated space which can not be used.")
158 ASAN_FLAG(bool, verify_asan_link_order, true,
159 "Check position of ASan runtime in library list (needs to be disabled"
160 " when other library has to be preloaded system-wide)")