1//===-- sanitizer_flags.h ---------------------------------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file describes common flags available in all sanitizers.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef COMMON_FLAG
15#error "Define COMMON_FLAG prior to including this file!"
16#endif
17
18// COMMON_FLAG(Type, Name, DefaultValue, Description)
19// Supported types: bool, const char *, int, uptr.
20// Default value must be a compile-time constant.
21// Description must be a string literal.
22
23COMMON_FLAG(
24    bool, symbolize, true,
25    "If set, use the online symbolizer from common sanitizer runtime to turn "
26    "virtual addresses to file/line locations.")
27COMMON_FLAG(
28    const char *, external_symbolizer_path, nullptr,
29    "Path to external symbolizer. If empty, the tool will search $PATH for "
30    "the symbolizer.")
31COMMON_FLAG(
32    bool, allow_addr2line, false,
33    "If set, allows online symbolizer to run addr2line binary to symbolize "
34    "stack traces (addr2line will only be used if llvm-symbolizer binary is "
35    "unavailable.")
36COMMON_FLAG(const char *, strip_path_prefix, "",
37            "Strips this prefix from file paths in error reports.")
38COMMON_FLAG(bool, fast_unwind_on_check, false,
39            "If available, use the fast frame-pointer-based unwinder on "
40            "internal CHECK failures.")
41COMMON_FLAG(bool, fast_unwind_on_fatal, false,
42            "If available, use the fast frame-pointer-based unwinder on fatal "
43            "errors.")
44COMMON_FLAG(bool, fast_unwind_on_malloc, true,
45            "If available, use the fast frame-pointer-based unwinder on "
46            "malloc/free.")
47COMMON_FLAG(bool, handle_ioctl, false, "Intercept and handle ioctl requests.")
48COMMON_FLAG(int, malloc_context_size, 1,
49            "Max number of stack frames kept for each allocation/deallocation.")
50COMMON_FLAG(
51    const char *, log_path, "stderr",
52    "Write logs to \"log_path.pid\". The special values are \"stdout\" and "
53    "\"stderr\". The default is \"stderr\".")
54COMMON_FLAG(
55    bool, log_exe_name, false,
56    "Mention name of executable when reporting error and "
57    "append executable name to logs (as in \"log_path.exe_name.pid\").")
58COMMON_FLAG(
59    bool, log_to_syslog, SANITIZER_ANDROID || SANITIZER_MAC,
60    "Write all sanitizer output to syslog in addition to other means of "
61    "logging.")
62COMMON_FLAG(
63    int, verbosity, 0,
64    "Verbosity level (0 - silent, 1 - a bit of output, 2+ - more output).")
65COMMON_FLAG(bool, detect_leaks, true, "Enable memory leak detection.")
66COMMON_FLAG(
67    bool, leak_check_at_exit, true,
68    "Invoke leak checking in an atexit handler. Has no effect if "
69    "detect_leaks=false, or if __lsan_do_leak_check() is called before the "
70    "handler has a chance to run.")
71COMMON_FLAG(bool, allocator_may_return_null, false,
72            "If false, the allocator will crash instead of returning 0 on "
73            "out-of-memory.")
74COMMON_FLAG(bool, print_summary, true,
75            "If false, disable printing error summaries in addition to error "
76            "reports.")
77COMMON_FLAG(bool, check_printf, true, "Check printf arguments.")
78COMMON_FLAG(bool, handle_segv, SANITIZER_NEEDS_SEGV,
79            "If set, registers the tool's custom SIGSEGV/SIGBUS handler.")
80COMMON_FLAG(bool, handle_abort, false,
81            "If set, registers the tool's custom SIGABRT handler.")
82COMMON_FLAG(bool, handle_sigill, false,
83            "If set, registers the tool's custom SIGILL handler.")
84COMMON_FLAG(bool, handle_sigfpe, true,
85            "If set, registers the tool's custom SIGFPE handler.")
86COMMON_FLAG(bool, allow_user_segv_handler, false,
87            "If set, allows user to register a SEGV handler even if the tool "
88            "registers one.")
89COMMON_FLAG(bool, use_sigaltstack, true,
90            "If set, uses alternate stack for signal handling.")
91COMMON_FLAG(bool, detect_deadlocks, false,
92            "If set, deadlock detection is enabled.")
93COMMON_FLAG(
94    uptr, clear_shadow_mmap_threshold, 64 * 1024,
95    "Large shadow regions are zero-filled using mmap(NORESERVE) instead of "
96    "memset(). This is the threshold size in bytes.")
97COMMON_FLAG(const char *, color, "auto",
98            "Colorize reports: (always|never|auto).")
99COMMON_FLAG(
100    bool, legacy_pthread_cond, false,
101    "Enables support for dynamic libraries linked with libpthread 2.2.5.")
102COMMON_FLAG(bool, intercept_tls_get_addr, false, "Intercept __tls_get_addr.")
103COMMON_FLAG(bool, help, false, "Print the flag descriptions.")
104COMMON_FLAG(uptr, mmap_limit_mb, 0,
105            "Limit the amount of mmap-ed memory (excluding shadow) in Mb; "
106            "not a user-facing flag, used mosly for testing the tools")
107COMMON_FLAG(uptr, hard_rss_limit_mb, 0,
108            "Hard RSS limit in Mb."
109            " If non-zero, a background thread is spawned at startup"
110            " which periodically reads RSS and aborts the process if the"
111            " limit is reached")
112COMMON_FLAG(uptr, soft_rss_limit_mb, 0,
113            "Soft RSS limit in Mb."
114            " If non-zero, a background thread is spawned at startup"
115            " which periodically reads RSS. If the limit is reached"
116            " all subsequent malloc/new calls will fail or return NULL"
117            " (depending on the value of allocator_may_return_null)"
118            " until the RSS goes below the soft limit."
119            " This limit does not affect memory allocations other than"
120            " malloc/new.")
121COMMON_FLAG(bool, can_use_proc_maps_statm, true,
122            "If false, do not attempt to read /proc/maps/statm."
123            " Mostly useful for testing sanitizers.")
124COMMON_FLAG(
125    bool, coverage, false,
126    "If set, coverage information will be dumped at program shutdown (if the "
127    "coverage instrumentation was enabled at compile time).")
128COMMON_FLAG(bool, coverage_pcs, true,
129            "If set (and if 'coverage' is set too), the coverage information "
130            "will be dumped as a set of PC offsets for every module.")
131COMMON_FLAG(bool, coverage_order_pcs, false,
132             "If true, the PCs will be dumped in the order they've"
133             " appeared during the execution.")
134COMMON_FLAG(bool, coverage_bitset, false,
135            "If set (and if 'coverage' is set too), the coverage information "
136            "will also be dumped as a bitset to a separate file.")
137COMMON_FLAG(bool, coverage_counters, false,
138            "If set (and if 'coverage' is set too), the bitmap that corresponds"
139            " to coverage counters will be dumped.")
140COMMON_FLAG(bool, coverage_direct, SANITIZER_ANDROID,
141            "If set, coverage information will be dumped directly to a memory "
142            "mapped file. This way data is not lost even if the process is "
143            "suddenly killed.")
144COMMON_FLAG(const char *, coverage_dir, ".",
145            "Target directory for coverage dumps. Defaults to the current "
146            "directory.")
147COMMON_FLAG(bool, coverage_pc_buffer, true,
148            "If set (and if 'coverage' is set too), the pcs would be collected "
149            "in a buffer.")
150COMMON_FLAG(bool, full_address_space, false,
151            "Sanitize complete address space; "
152            "by default kernel area on 32-bit platforms will not be sanitized")
153COMMON_FLAG(bool, print_suppressions, true,
154            "Print matched suppressions at exit.")
155COMMON_FLAG(
156    bool, disable_coredump, (SANITIZER_WORDSIZE == 64),
157    "Disable core dumping. By default, disable_core=1 on 64-bit to avoid "
158    "dumping a 16T+ core file. Ignored on OSes that don't dump core by"
159    "default and for sanitizers that don't reserve lots of virtual memory.")
160COMMON_FLAG(bool, use_madv_dontdump, true,
161          "If set, instructs kernel to not store the (huge) shadow "
162          "in core file.")
163COMMON_FLAG(bool, symbolize_inline_frames, true,
164            "Print inlined frames in stacktraces. Defaults to true.")
165COMMON_FLAG(bool, symbolize_vs_style, false,
166            "Print file locations in Visual Studio style (e.g: "
167            " file(10,42): ...")
168COMMON_FLAG(const char *, stack_trace_format, "DEFAULT",
169            "Format string used to render stack frames. "
170            "See sanitizer_stacktrace_printer.h for the format description. "
171            "Use DEFAULT to get default format.")
172COMMON_FLAG(bool, no_huge_pages_for_shadow, true,
173            "If true, the shadow is not allowed to use huge pages. ")
174COMMON_FLAG(bool, strict_string_checks, false,
175            "If set check that string arguments are properly null-terminated")
176COMMON_FLAG(bool, intercept_strstr, true,
177            "If set, uses custom wrappers for strstr and strcasestr functions "
178            "to find more errors.")
179COMMON_FLAG(bool, intercept_strspn, true,
180            "If set, uses custom wrappers for strspn and strcspn function "
181            "to find more errors.")
182COMMON_FLAG(bool, intercept_strpbrk, true,
183            "If set, uses custom wrappers for strpbrk function "
184            "to find more errors.")
185COMMON_FLAG(bool, intercept_memcmp, true,
186            "If set, uses custom wrappers for memcmp function "
187            "to find more errors.")
188COMMON_FLAG(bool, strict_memcmp, true,
189          "If true, assume that memcmp(p1, p2, n) always reads n bytes before "
190          "comparing p1 and p2.")
191COMMON_FLAG(bool, decorate_proc_maps, false, "If set, decorate sanitizer "
192                                             "mappings in /proc/self/maps with "
193                                             "user-readable names")
194COMMON_FLAG(int, exitcode, 1, "Override the program exit status if the tool "
195                              "found an error")
196COMMON_FLAG(
197    bool, abort_on_error, SANITIZER_MAC,
198    "If set, the tool calls abort() instead of _exit() after printing the "
199    "error report.")
200COMMON_FLAG(bool, suppress_equal_pcs, true,
201            "Deduplicate multiple reports for single source location in "
202            "halt_on_error=false mode (asan only).")
203