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1 //===-- sanitizer_flags.h ---------------------------------------*- C++ -*-===//
2 //
3 // This file is distributed under the University of Illinois Open Source
4 // License. See LICENSE.TXT for details.
5 //
6 //===----------------------------------------------------------------------===//
7 //
8 // This file describes common flags available in all sanitizers.
9 //
10 //===----------------------------------------------------------------------===//
12 #ifndef COMMON_FLAG
13 #error "Define COMMON_FLAG prior to including this file!"
14 #endif
16 // COMMON_FLAG(Type, Name, DefaultValue, Description)
17 // Supported types: bool, const char *, int, uptr.
18 // Default value must be a compile-time constant.
19 // Description must be a string literal.
21 COMMON_FLAG(
22 bool, symbolize, true,
23 "If set, use the online symbolizer from common sanitizer runtime to turn "
24 "virtual addresses to file/line locations.")
25 COMMON_FLAG(
26 const char *, external_symbolizer_path, nullptr,
27 "Path to external symbolizer. If empty, the tool will search $PATH for "
28 "the symbolizer.")
29 COMMON_FLAG(
30 bool, allow_addr2line, false,
31 "If set, allows online symbolizer to run addr2line binary to symbolize "
32 "stack traces (addr2line will only be used if llvm-symbolizer binary is "
33 "unavailable.")
34 COMMON_FLAG(const char *, strip_path_prefix, "",
35 "Strips this prefix from file paths in error reports.")
36 COMMON_FLAG(bool, fast_unwind_on_check, false,
37 "If available, use the fast frame-pointer-based unwinder on "
38 "internal CHECK failures.")
39 COMMON_FLAG(bool, fast_unwind_on_fatal, false,
40 "If available, use the fast frame-pointer-based unwinder on fatal "
41 "errors.")
42 COMMON_FLAG(bool, fast_unwind_on_malloc, true,
43 "If available, use the fast frame-pointer-based unwinder on "
44 "malloc/free.")
45 COMMON_FLAG(bool, handle_ioctl, false, "Intercept and handle ioctl requests.")
46 COMMON_FLAG(int, malloc_context_size, 1,
47 "Max number of stack frames kept for each allocation/deallocation.")
48 COMMON_FLAG(
49 const char *, log_path, "stderr",
50 "Write logs to \"log_path.pid\". The special values are \"stdout\" and "
51 "\"stderr\". The default is \"stderr\".")
52 COMMON_FLAG(
53 bool, log_exe_name, false,
54 "Mention name of executable when reporting error and "
55 "append executable name to logs (as in \"log_path.exe_name.pid\").")
56 COMMON_FLAG(
57 bool, log_to_syslog, (bool)SANITIZER_ANDROID || (bool)SANITIZER_MAC,
58 "Write all sanitizer output to syslog in addition to other means of "
59 "logging.")
60 COMMON_FLAG(
61 int, verbosity, 0,
62 "Verbosity level (0 - silent, 1 - a bit of output, 2+ - more output).")
63 COMMON_FLAG(bool, strip_env, 1,
64 "Whether to remove the sanitizer from DYLD_INSERT_LIBRARIES to "
65 "avoid passing it to children. Default is true.")
66 COMMON_FLAG(bool, detect_leaks, !SANITIZER_MAC, "Enable memory leak detection.")
67 COMMON_FLAG(
68 bool, leak_check_at_exit, true,
69 "Invoke leak checking in an atexit handler. Has no effect if "
70 "detect_leaks=false, or if __lsan_do_leak_check() is called before the "
71 "handler has a chance to run.")
72 COMMON_FLAG(bool, allocator_may_return_null, false,
73 "If false, the allocator will crash instead of returning 0 on "
74 "out-of-memory.")
75 COMMON_FLAG(bool, print_summary, true,
76 "If false, disable printing error summaries in addition to error "
77 "reports.")
78 COMMON_FLAG(int, print_module_map, 0,
79 "OS X only (0 - don't print, 1 - print only once before process "
80 "exits, 2 - print after each report).")
81 COMMON_FLAG(bool, check_printf, true, "Check printf arguments.")
82 #define COMMON_FLAG_HANDLE_SIGNAL_HELP(signal) \
83 "Controls custom tool's " #signal " handler (0 - do not registers the " \
84 "handler, 1 - register the handler and allow user to set own, " \
85 "2 - registers the handler and block user from changing it). "
86 COMMON_FLAG(HandleSignalMode, handle_segv, kHandleSignalYes,
87 COMMON_FLAG_HANDLE_SIGNAL_HELP(SIGSEGV))
88 COMMON_FLAG(HandleSignalMode, handle_sigbus, kHandleSignalYes,
89 COMMON_FLAG_HANDLE_SIGNAL_HELP(SIGBUS))
90 COMMON_FLAG(HandleSignalMode, handle_abort, kHandleSignalNo,
91 COMMON_FLAG_HANDLE_SIGNAL_HELP(SIGABRT))
92 COMMON_FLAG(HandleSignalMode, handle_sigill, kHandleSignalNo,
93 COMMON_FLAG_HANDLE_SIGNAL_HELP(SIGILL))
94 COMMON_FLAG(HandleSignalMode, handle_sigtrap, kHandleSignalNo,
95 COMMON_FLAG_HANDLE_SIGNAL_HELP(SIGTRAP))
96 COMMON_FLAG(HandleSignalMode, handle_sigfpe, kHandleSignalYes,
97 COMMON_FLAG_HANDLE_SIGNAL_HELP(SIGFPE))
98 #undef COMMON_FLAG_HANDLE_SIGNAL_HELP
99 COMMON_FLAG(bool, allow_user_segv_handler, true,
100 "Deprecated. True has no effect, use handle_sigbus=1. If false, "
101 "handle_*=1 will be upgraded to handle_*=2.")
102 COMMON_FLAG(bool, use_sigaltstack, true,
103 "If set, uses alternate stack for signal handling.")
104 COMMON_FLAG(bool, detect_deadlocks, false,
105 "If set, deadlock detection is enabled.")
106 COMMON_FLAG(
107 uptr, clear_shadow_mmap_threshold, 64 * 1024,
108 "Large shadow regions are zero-filled using mmap(NORESERVE) instead of "
109 "memset(). This is the threshold size in bytes.")
110 COMMON_FLAG(const char *, color, "auto",
111 "Colorize reports: (always|never|auto).")
112 COMMON_FLAG(
113 bool, legacy_pthread_cond, false,
114 "Enables support for dynamic libraries linked with libpthread 2.2.5.")
115 COMMON_FLAG(bool, intercept_tls_get_addr, false, "Intercept __tls_get_addr.")
116 COMMON_FLAG(bool, help, false, "Print the flag descriptions.")
117 COMMON_FLAG(uptr, mmap_limit_mb, 0,
118 "Limit the amount of mmap-ed memory (excluding shadow) in Mb; "
119 "not a user-facing flag, used mosly for testing the tools")
120 COMMON_FLAG(uptr, hard_rss_limit_mb, 0,
121 "Hard RSS limit in Mb."
122 " If non-zero, a background thread is spawned at startup"
123 " which periodically reads RSS and aborts the process if the"
124 " limit is reached")
125 COMMON_FLAG(uptr, soft_rss_limit_mb, 0,
126 "Soft RSS limit in Mb."
127 " If non-zero, a background thread is spawned at startup"
128 " which periodically reads RSS. If the limit is reached"
129 " all subsequent malloc/new calls will fail or return NULL"
130 " (depending on the value of allocator_may_return_null)"
131 " until the RSS goes below the soft limit."
132 " This limit does not affect memory allocations other than"
133 " malloc/new.")
134 COMMON_FLAG(bool, heap_profile, false, "Experimental heap profiler, asan-only")
135 COMMON_FLAG(s32, allocator_release_to_os_interval_ms,
136 ((bool)SANITIZER_FUCHSIA || (bool)SANITIZER_WINDOWS) ? -1 : 5000,
137 "Only affects a 64-bit allocator. If set, tries to release unused "
138 "memory to the OS, but not more often than this interval (in "
139 "milliseconds). Negative values mean do not attempt to release "
140 "memory to the OS.\n")
141 COMMON_FLAG(bool, can_use_proc_maps_statm, true,
142 "If false, do not attempt to read /proc/maps/statm."
143 " Mostly useful for testing sanitizers.")
144 COMMON_FLAG(
145 bool, coverage, false,
146 "If set, coverage information will be dumped at program shutdown (if the "
147 "coverage instrumentation was enabled at compile time).")
148 COMMON_FLAG(const char *, coverage_dir, ".",
149 "Target directory for coverage dumps. Defaults to the current "
150 "directory.")
151 COMMON_FLAG(bool, full_address_space, false,
152 "Sanitize complete address space; "
153 "by default kernel area on 32-bit platforms will not be sanitized")
154 COMMON_FLAG(bool, print_suppressions, true,
155 "Print matched suppressions at exit.")
156 COMMON_FLAG(
157 bool, disable_coredump, (SANITIZER_WORDSIZE == 64) && !SANITIZER_GO,
158 "Disable core dumping. By default, disable_coredump=1 on 64-bit to avoid"
159 " dumping a 16T+ core file. Ignored on OSes that don't dump core by"
160 " default and for sanitizers that don't reserve lots of virtual memory.")
161 COMMON_FLAG(bool, use_madv_dontdump, true,
162 "If set, instructs kernel to not store the (huge) shadow "
163 "in core file.")
164 COMMON_FLAG(bool, symbolize_inline_frames, true,
165 "Print inlined frames in stacktraces. Defaults to true.")
166 COMMON_FLAG(bool, symbolize_vs_style, false,
167 "Print file locations in Visual Studio style (e.g: "
168 " file(10,42): ...")
169 COMMON_FLAG(int, dedup_token_length, 0,
170 "If positive, after printing a stack trace also print a short "
171 "string token based on this number of frames that will simplify "
172 "deduplication of the reports. "
173 "Example: 'DEDUP_TOKEN: foo-bar-main'. Default is 0.")
174 COMMON_FLAG(const char *, stack_trace_format, "DEFAULT",
175 "Format string used to render stack frames. "
176 "See sanitizer_stacktrace_printer.h for the format description. "
177 "Use DEFAULT to get default format.")
178 COMMON_FLAG(bool, no_huge_pages_for_shadow, true,
179 "If true, the shadow is not allowed to use huge pages. ")
180 COMMON_FLAG(bool, strict_string_checks, false,
181 "If set check that string arguments are properly null-terminated")
182 COMMON_FLAG(bool, intercept_strstr, true,
183 "If set, uses custom wrappers for strstr and strcasestr functions "
184 "to find more errors.")
185 COMMON_FLAG(bool, intercept_strspn, true,
186 "If set, uses custom wrappers for strspn and strcspn function "
187 "to find more errors.")
188 COMMON_FLAG(bool, intercept_strtok, true,
189 "If set, uses a custom wrapper for the strtok function "
190 "to find more errors.")
191 COMMON_FLAG(bool, intercept_strpbrk, true,
192 "If set, uses custom wrappers for strpbrk function "
193 "to find more errors.")
194 COMMON_FLAG(bool, intercept_strlen, true,
195 "If set, uses custom wrappers for strlen and strnlen functions "
196 "to find more errors.")
197 COMMON_FLAG(bool, intercept_strndup, true,
198 "If set, uses custom wrappers for strndup functions "
199 "to find more errors.")
200 COMMON_FLAG(bool, intercept_strchr, true,
201 "If set, uses custom wrappers for strchr, strchrnul, and strrchr "
202 "functions to find more errors.")
203 COMMON_FLAG(bool, intercept_memcmp, true,
204 "If set, uses custom wrappers for memcmp function "
205 "to find more errors.")
206 COMMON_FLAG(bool, strict_memcmp, true,
207 "If true, assume that memcmp(p1, p2, n) always reads n bytes before "
208 "comparing p1 and p2.")
209 COMMON_FLAG(bool, intercept_memmem, true,
210 "If set, uses a wrapper for memmem() to find more errors.")
211 COMMON_FLAG(bool, intercept_intrin, true,
212 "If set, uses custom wrappers for memset/memcpy/memmove "
213 "intrinsics to find more errors.")
214 COMMON_FLAG(bool, intercept_stat, true,
215 "If set, uses custom wrappers for *stat functions "
216 "to find more errors.")
217 COMMON_FLAG(bool, intercept_send, true,
218 "If set, uses custom wrappers for send* functions "
219 "to find more errors.")
220 COMMON_FLAG(bool, decorate_proc_maps, false, "If set, decorate sanitizer "
221 "mappings in /proc/self/maps with "
222 "user-readable names")
223 COMMON_FLAG(int, exitcode, 1, "Override the program exit status if the tool "
224 "found an error")
225 COMMON_FLAG(
226 bool, abort_on_error, (bool)SANITIZER_ANDROID || (bool)SANITIZER_MAC,
227 "If set, the tool calls abort() instead of _exit() after printing the "
228 "error report.")
229 COMMON_FLAG(bool, suppress_equal_pcs, true,
230 "Deduplicate multiple reports for single source location in "
231 "halt_on_error=false mode (asan only).")
232 COMMON_FLAG(bool, print_cmdline, false, "Print command line on crash "
233 "(asan only).")
234 COMMON_FLAG(bool, html_cov_report, false, "Generate html coverage report.")
235 COMMON_FLAG(const char *, sancov_path, "sancov", "Sancov tool location.")
236 COMMON_FLAG(bool, dump_instruction_bytes, false,
237 "If true, dump 16 bytes starting at the instruction that caused SEGV")
238 COMMON_FLAG(bool, dump_registers, true,
239 "If true, dump values of CPU registers when SEGV happens. Only "
240 "available on OS X for now.")
241 COMMON_FLAG(bool, detect_write_exec, false,
242 "If true, triggers warning when writable-executable pages requests "
243 "are being made")