1//===-- sanitizer_flags.h ---------------------------------------*- C++ -*-===// 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8// 9// This file describes common flags available in all sanitizers. 10// 11//===----------------------------------------------------------------------===// 12 13#ifndef COMMON_FLAG 14#error "Define COMMON_FLAG prior to including this file!" 15#endif 16 17// COMMON_FLAG(Type, Name, DefaultValue, Description) 18// Supported types: bool, const char *, int, uptr. 19// Default value must be a compile-time constant. 20// Description must be a string literal. 21 22COMMON_FLAG( 23 bool, symbolize, true, 24 "If set, use the online symbolizer from common sanitizer runtime to turn " 25 "virtual addresses to file/line locations.") 26COMMON_FLAG( 27 const char *, external_symbolizer_path, nullptr, 28 "Path to external symbolizer. If empty, the tool will search $PATH for " 29 "the symbolizer.") 30COMMON_FLAG( 31 bool, allow_addr2line, false, 32 "If set, allows online symbolizer to run addr2line binary to symbolize " 33 "stack traces (addr2line will only be used if llvm-symbolizer binary is " 34 "unavailable.") 35COMMON_FLAG(const char *, strip_path_prefix, "", 36 "Strips this prefix from file paths in error reports.") 37COMMON_FLAG(bool, fast_unwind_on_check, false, 38 "If available, use the fast frame-pointer-based unwinder on " 39 "internal CHECK failures.") 40COMMON_FLAG(bool, fast_unwind_on_fatal, false, 41 "If available, use the fast frame-pointer-based unwinder on fatal " 42 "errors.") 43// ARM thumb/thumb2 frame pointer is inconsistent on GCC and Clang [1] 44// and fast-unwider is also unreliable with mixing arm and thumb code [2]. 45// [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92172 46// [2] https://bugs.llvm.org/show_bug.cgi?id=44158 47COMMON_FLAG(bool, fast_unwind_on_malloc, 48 !(SANITIZER_LINUX && !SANITIZER_ANDROID && SANITIZER_ARM), 49 "If available, use the fast frame-pointer-based unwinder on " 50 "malloc/free.") 51COMMON_FLAG(bool, handle_ioctl, false, "Intercept and handle ioctl requests.") 52COMMON_FLAG(int, malloc_context_size, 1, 53 "Max number of stack frames kept for each allocation/deallocation.") 54COMMON_FLAG( 55 const char *, log_path, nullptr, 56 "Write logs to \"log_path.pid\". The special values are \"stdout\" and " 57 "\"stderr\". If unspecified, defaults to \"stderr\".") 58COMMON_FLAG( 59 bool, log_exe_name, false, 60 "Mention name of executable when reporting error and " 61 "append executable name to logs (as in \"log_path.exe_name.pid\").") 62COMMON_FLAG(const char *, log_suffix, nullptr, 63 "String to append to log file name, e.g. \".txt\".") 64COMMON_FLAG( 65 bool, log_to_syslog, (bool)SANITIZER_ANDROID || (bool)SANITIZER_APPLE, 66 "Write all sanitizer output to syslog in addition to other means of " 67 "logging.") 68COMMON_FLAG( 69 int, verbosity, 0, 70 "Verbosity level (0 - silent, 1 - a bit of output, 2+ - more output).") 71COMMON_FLAG(bool, strip_env, true, 72 "Whether to remove the sanitizer from DYLD_INSERT_LIBRARIES to " 73 "avoid passing it to children on Apple platforms. Default is true.") 74COMMON_FLAG(bool, verify_interceptors, true, 75 "Verify that interceptors are working on Apple platforms. Default " 76 "is true.") 77COMMON_FLAG(bool, detect_leaks, !SANITIZER_APPLE, "Enable memory leak detection.") 78COMMON_FLAG( 79 bool, leak_check_at_exit, true, 80 "Invoke leak checking in an atexit handler. Has no effect if " 81 "detect_leaks=false, or if __lsan_do_leak_check() is called before the " 82 "handler has a chance to run.") 83COMMON_FLAG(bool, allocator_may_return_null, false, 84 "If false, the allocator will crash instead of returning 0 on " 85 "out-of-memory.") 86COMMON_FLAG(bool, print_summary, true, 87 "If false, disable printing error summaries in addition to error " 88 "reports.") 89COMMON_FLAG(int, print_module_map, 0, 90 "Print the process module map where supported (0 - don't print, " 91 "1 - print only once before process exits, 2 - print after each " 92 "report).") 93COMMON_FLAG(bool, check_printf, true, "Check printf arguments.") 94#define COMMON_FLAG_HANDLE_SIGNAL_HELP(signal) \ 95 "Controls custom tool's " #signal " handler (0 - do not registers the " \ 96 "handler, 1 - register the handler and allow user to set own, " \ 97 "2 - registers the handler and block user from changing it). " 98COMMON_FLAG(HandleSignalMode, handle_segv, kHandleSignalYes, 99 COMMON_FLAG_HANDLE_SIGNAL_HELP(SIGSEGV)) 100COMMON_FLAG(HandleSignalMode, handle_sigbus, kHandleSignalYes, 101 COMMON_FLAG_HANDLE_SIGNAL_HELP(SIGBUS)) 102COMMON_FLAG(HandleSignalMode, handle_abort, kHandleSignalNo, 103 COMMON_FLAG_HANDLE_SIGNAL_HELP(SIGABRT)) 104COMMON_FLAG(HandleSignalMode, handle_sigill, kHandleSignalNo, 105 COMMON_FLAG_HANDLE_SIGNAL_HELP(SIGILL)) 106COMMON_FLAG(HandleSignalMode, handle_sigtrap, kHandleSignalNo, 107 COMMON_FLAG_HANDLE_SIGNAL_HELP(SIGTRAP)) 108COMMON_FLAG(HandleSignalMode, handle_sigfpe, kHandleSignalYes, 109 COMMON_FLAG_HANDLE_SIGNAL_HELP(SIGFPE)) 110#undef COMMON_FLAG_HANDLE_SIGNAL_HELP 111COMMON_FLAG(bool, allow_user_segv_handler, true, 112 "Deprecated. True has no effect, use handle_sigbus=1. If false, " 113 "handle_*=1 will be upgraded to handle_*=2.") 114COMMON_FLAG(bool, use_sigaltstack, true, 115 "If set, uses alternate stack for signal handling.") 116COMMON_FLAG(bool, detect_deadlocks, true, 117 "If set, deadlock detection is enabled.") 118COMMON_FLAG( 119 uptr, clear_shadow_mmap_threshold, 64 * 1024, 120 "Large shadow regions are zero-filled using mmap(NORESERVE) instead of " 121 "memset(). This is the threshold size in bytes.") 122COMMON_FLAG(const char *, color, "auto", 123 "Colorize reports: (always|never|auto).") 124COMMON_FLAG( 125 bool, legacy_pthread_cond, false, 126 "Enables support for dynamic libraries linked with libpthread 2.2.5.") 127COMMON_FLAG(bool, intercept_tls_get_addr, false, "Intercept __tls_get_addr.") 128COMMON_FLAG(bool, help, false, "Print the flag descriptions.") 129COMMON_FLAG(uptr, mmap_limit_mb, 0, 130 "Limit the amount of mmap-ed memory (excluding shadow) in Mb; " 131 "not a user-facing flag, used mosly for testing the tools") 132COMMON_FLAG(uptr, hard_rss_limit_mb, 0, 133 "Hard RSS limit in Mb." 134 " If non-zero, a background thread is spawned at startup" 135 " which periodically reads RSS and aborts the process if the" 136 " limit is reached") 137COMMON_FLAG(uptr, soft_rss_limit_mb, 0, 138 "Soft RSS limit in Mb." 139 " If non-zero, a background thread is spawned at startup" 140 " which periodically reads RSS. If the limit is reached" 141 " all subsequent malloc/new calls will fail or return NULL" 142 " (depending on the value of allocator_may_return_null)" 143 " until the RSS goes below the soft limit." 144 " This limit does not affect memory allocations other than" 145 " malloc/new.") 146COMMON_FLAG(uptr, max_allocation_size_mb, 0, 147 "If non-zero, malloc/new calls larger than this size will return " 148 "nullptr (or crash if allocator_may_return_null=false).") 149COMMON_FLAG(bool, heap_profile, false, "Experimental heap profiler, asan-only") 150COMMON_FLAG(s32, allocator_release_to_os_interval_ms, 151 ((bool)SANITIZER_FUCHSIA || (bool)SANITIZER_WINDOWS) ? -1 : 5000, 152 "Only affects a 64-bit allocator. If set, tries to release unused " 153 "memory to the OS, but not more often than this interval (in " 154 "milliseconds). Negative values mean do not attempt to release " 155 "memory to the OS.\n") 156COMMON_FLAG(bool, can_use_proc_maps_statm, true, 157 "If false, do not attempt to read /proc/maps/statm." 158 " Mostly useful for testing sanitizers.") 159COMMON_FLAG( 160 bool, coverage, false, 161 "If set, coverage information will be dumped at program shutdown (if the " 162 "coverage instrumentation was enabled at compile time).") 163COMMON_FLAG(const char *, coverage_dir, ".", 164 "Target directory for coverage dumps. Defaults to the current " 165 "directory.") 166COMMON_FLAG(const char *, cov_8bit_counters_out, "", 167 "If non-empty, write 8bit counters to this file. ") 168COMMON_FLAG(const char *, cov_pcs_out, "", 169 "If non-empty, write the coverage pc table to this file. ") 170COMMON_FLAG(bool, full_address_space, false, 171 "Sanitize complete address space; " 172 "by default kernel area on 32-bit platforms will not be sanitized") 173COMMON_FLAG(bool, print_suppressions, true, 174 "Print matched suppressions at exit.") 175COMMON_FLAG( 176 bool, disable_coredump, (SANITIZER_WORDSIZE == 64) && !SANITIZER_GO, 177 "Disable core dumping. By default, disable_coredump=1 on 64-bit to avoid" 178 " dumping a 16T+ core file. Ignored on OSes that don't dump core by" 179 " default and for sanitizers that don't reserve lots of virtual memory.") 180COMMON_FLAG(bool, use_madv_dontdump, true, 181 "If set, instructs kernel to not store the (huge) shadow " 182 "in core file.") 183COMMON_FLAG(bool, symbolize_inline_frames, true, 184 "Print inlined frames in stacktraces. Defaults to true.") 185COMMON_FLAG(bool, demangle, true, "Print demangled symbols.") 186COMMON_FLAG(bool, symbolize_vs_style, false, 187 "Print file locations in Visual Studio style (e.g: " 188 " file(10,42): ...") 189COMMON_FLAG(int, dedup_token_length, 0, 190 "If positive, after printing a stack trace also print a short " 191 "string token based on this number of frames that will simplify " 192 "deduplication of the reports. " 193 "Example: 'DEDUP_TOKEN: foo-bar-main'. Default is 0.") 194COMMON_FLAG(const char *, stack_trace_format, "DEFAULT", 195 "Format string used to render stack frames. " 196 "See sanitizer_stacktrace_printer.h for the format description. " 197 "Use DEFAULT to get default format.") 198COMMON_FLAG(int, compress_stack_depot, 0, 199 "Compress stack depot to save memory.") 200COMMON_FLAG(bool, no_huge_pages_for_shadow, true, 201 "If true, the shadow is not allowed to use huge pages. ") 202COMMON_FLAG(bool, strict_string_checks, false, 203 "If set check that string arguments are properly null-terminated") 204COMMON_FLAG(bool, intercept_strstr, true, 205 "If set, uses custom wrappers for strstr and strcasestr functions " 206 "to find more errors.") 207COMMON_FLAG(bool, intercept_strspn, true, 208 "If set, uses custom wrappers for strspn and strcspn function " 209 "to find more errors.") 210COMMON_FLAG(bool, intercept_strtok, true, 211 "If set, uses a custom wrapper for the strtok function " 212 "to find more errors.") 213COMMON_FLAG(bool, intercept_strpbrk, true, 214 "If set, uses custom wrappers for strpbrk function " 215 "to find more errors.") 216COMMON_FLAG( 217 bool, intercept_strcmp, true, 218 "If set, uses custom wrappers for strcmp functions to find more errors.") 219COMMON_FLAG(bool, intercept_strlen, true, 220 "If set, uses custom wrappers for strlen and strnlen functions " 221 "to find more errors.") 222COMMON_FLAG(bool, intercept_strndup, true, 223 "If set, uses custom wrappers for strndup functions " 224 "to find more errors.") 225COMMON_FLAG(bool, intercept_strchr, true, 226 "If set, uses custom wrappers for strchr, strchrnul, and strrchr " 227 "functions to find more errors.") 228COMMON_FLAG(bool, intercept_memcmp, true, 229 "If set, uses custom wrappers for memcmp function " 230 "to find more errors.") 231COMMON_FLAG(bool, strict_memcmp, true, 232 "If true, assume that memcmp(p1, p2, n) always reads n bytes before " 233 "comparing p1 and p2.") 234COMMON_FLAG(bool, intercept_memmem, true, 235 "If set, uses a wrapper for memmem() to find more errors.") 236COMMON_FLAG(bool, intercept_intrin, true, 237 "If set, uses custom wrappers for memset/memcpy/memmove " 238 "intrinsics to find more errors.") 239COMMON_FLAG(bool, intercept_stat, true, 240 "If set, uses custom wrappers for *stat functions " 241 "to find more errors.") 242COMMON_FLAG(bool, intercept_send, true, 243 "If set, uses custom wrappers for send* functions " 244 "to find more errors.") 245COMMON_FLAG(bool, decorate_proc_maps, (bool)SANITIZER_ANDROID, 246 "If set, decorate sanitizer mappings in /proc/self/maps with " 247 "user-readable names") 248COMMON_FLAG(int, exitcode, 1, "Override the program exit status if the tool " 249 "found an error") 250COMMON_FLAG( 251 bool, abort_on_error, (bool)SANITIZER_ANDROID || (bool)SANITIZER_APPLE, 252 "If set, the tool calls abort() instead of _exit() after printing the " 253 "error report.") 254COMMON_FLAG(bool, suppress_equal_pcs, true, 255 "Deduplicate multiple reports for single source location in " 256 "halt_on_error=false mode (asan only).") 257COMMON_FLAG(bool, print_cmdline, false, "Print command line on crash " 258 "(asan only).") 259COMMON_FLAG(bool, html_cov_report, false, "Generate html coverage report.") 260COMMON_FLAG(const char *, sancov_path, "sancov", "Sancov tool location.") 261COMMON_FLAG(bool, dump_instruction_bytes, false, 262 "If true, dump 16 bytes starting at the instruction that caused SEGV") 263COMMON_FLAG(bool, dump_registers, true, 264 "If true, dump values of CPU registers when SEGV happens. Only " 265 "available on OS X for now.") 266COMMON_FLAG(bool, detect_write_exec, false, 267 "If true, triggers warning when writable-executable pages requests " 268 "are being made") 269COMMON_FLAG(bool, test_only_emulate_no_memorymap, false, 270 "TEST ONLY fail to read memory mappings to emulate sanitized " 271 "\"init\"") 272