1//===- FuzzerFlags.def - Run-time flags -------------------------*- 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// Flags. FUZZER_FLAG_INT/FUZZER_FLAG_STRING macros should be defined at the
10// point of inclusion. We are not using any flag parsing library for better
11// portability and independence.
12//===----------------------------------------------------------------------===//
13FUZZER_FLAG_INT(verbosity, 1, "Verbosity level.")
14FUZZER_FLAG_UNSIGNED(seed, 0, "Random seed. If 0, seed is generated.")
15FUZZER_FLAG_INT(runs, -1,
16            "Number of individual test runs (-1 for infinite runs).")
17FUZZER_FLAG_INT(max_len, 0, "Maximum length of the test input. "
18    "If 0, libFuzzer tries to guess a good value based on the corpus "
19    "and reports it. ")
20FUZZER_FLAG_INT(len_control, 100, "Try generating small inputs first, "
21  "then try larger inputs over time.  Specifies the rate at which the length "
22  "limit is increased (smaller == faster).  If 0, immediately try inputs with "
23  "size up to max_len.")
24FUZZER_FLAG_INT(cross_over, 1, "If 1, cross over inputs.")
25FUZZER_FLAG_INT(mutate_depth, 5,
26            "Apply this number of consecutive mutations to each input.")
27FUZZER_FLAG_INT(reduce_depth, 0, "Experimental/internal. "
28                "Reduce depth if mutations lose unique features")
29FUZZER_FLAG_INT(shuffle, 1, "Shuffle inputs at startup")
30FUZZER_FLAG_INT(prefer_small, 1,
31    "If 1, always prefer smaller inputs during the corpus shuffle.")
32FUZZER_FLAG_INT(
33    timeout, 1200,
34    "Timeout in seconds (if positive). "
35    "If one unit runs more than this number of seconds the process will abort.")
36FUZZER_FLAG_INT(error_exitcode, 77, "When libFuzzer itself reports a bug "
37  "this exit code will be used.")
38FUZZER_FLAG_INT(timeout_exitcode, 77, "When libFuzzer reports a timeout "
39  "this exit code will be used.")
40FUZZER_FLAG_INT(max_total_time, 0, "If positive, indicates the maximal total "
41                                   "time in seconds to run the fuzzer.")
42FUZZER_FLAG_INT(help, 0, "Print help.")
43FUZZER_FLAG_INT(merge, 0, "If 1, the 2-nd, 3-rd, etc corpora will be "
44  "merged into the 1-st corpus. Only interesting units will be taken. "
45  "This flag can be used to minimize a corpus.")
46FUZZER_FLAG_STRING(merge_inner, "internal flag")
47FUZZER_FLAG_STRING(merge_control_file,
48                   "Specify a control file used for the merge process. "
49                   "If a merge process gets killed it tries to leave this file "
50                   "in a state suitable for resuming the merge. "
51                   "By default a temporary file will be used.")
52FUZZER_FLAG_STRING(save_coverage_summary, "Experimental:"
53                   " save coverage summary to a given file."
54                   " Used with -merge=1")
55FUZZER_FLAG_STRING(load_coverage_summary, "Experimental:"
56                   " load coverage summary from a given file."
57                   " Treat this coverage as belonging to the first corpus. "
58                   " Used with -merge=1")
59FUZZER_FLAG_INT(minimize_crash, 0, "If 1, minimizes the provided"
60  " crash input. Use with -runs=N or -max_total_time=N to limit "
61  "the number attempts."
62  " Use with -exact_artifact_path to specify the output."
63  " Combine with ASAN_OPTIONS=dedup_token_length=3 (or similar) to ensure that"
64  " the minimized input triggers the same crash."
65  )
66FUZZER_FLAG_INT(cleanse_crash, 0, "If 1, tries to cleanse the provided"
67  " crash input to make it contain fewer original bytes."
68  " Use with -exact_artifact_path to specify the output."
69  )
70FUZZER_FLAG_INT(minimize_crash_internal_step, 0, "internal flag")
71FUZZER_FLAG_INT(use_counters, 1, "Use coverage counters")
72FUZZER_FLAG_INT(use_memmem, 1,
73                "Use hints from intercepting memmem, strstr, etc")
74FUZZER_FLAG_INT(use_value_profile, 0,
75                "Experimental. Use value profile to guide fuzzing.")
76FUZZER_FLAG_INT(use_cmp, 1, "Use CMP traces to guide mutations")
77FUZZER_FLAG_INT(shrink, 0, "Experimental. Try to shrink corpus inputs.")
78FUZZER_FLAG_INT(reduce_inputs, 1,
79  "Try to reduce the size of inputs while preserving their full feature sets")
80FUZZER_FLAG_UNSIGNED(jobs, 0, "Number of jobs to run. If jobs >= 1 we spawn"
81                          " this number of jobs in separate worker processes"
82                          " with stdout/stderr redirected to fuzz-JOB.log.")
83FUZZER_FLAG_UNSIGNED(workers, 0,
84            "Number of simultaneous worker processes to run the jobs."
85            " If zero, \"min(jobs,NumberOfCpuCores()/2)\" is used.")
86FUZZER_FLAG_INT(reload, 1,
87                "Reload the main corpus every <N> seconds to get new units"
88                " discovered by other processes. If 0, disabled")
89FUZZER_FLAG_INT(report_slow_units, 10,
90    "Report slowest units if they run for more than this number of seconds.")
91FUZZER_FLAG_INT(only_ascii, 0,
92                "If 1, generate only ASCII (isprint+isspace) inputs.")
93FUZZER_FLAG_STRING(dict, "Experimental. Use the dictionary file.")
94FUZZER_FLAG_STRING(artifact_prefix, "Write fuzzing artifacts (crash, "
95                                    "timeout, or slow inputs) as "
96                                    "$(artifact_prefix)file")
97FUZZER_FLAG_STRING(exact_artifact_path,
98                   "Write the single artifact on failure (crash, timeout) "
99                   "as $(exact_artifact_path). This overrides -artifact_prefix "
100                   "and will not use checksum in the file name. Do not "
101                   "use the same path for several parallel processes.")
102FUZZER_FLAG_INT(print_pcs, 0, "If 1, print out newly covered PCs.")
103FUZZER_FLAG_INT(print_funcs, 2, "If >=1, print out at most this number of "
104                                "newly covered functions.")
105FUZZER_FLAG_INT(print_final_stats, 0, "If 1, print statistics at exit.")
106FUZZER_FLAG_INT(print_corpus_stats, 0,
107  "If 1, print statistics on corpus elements at exit.")
108FUZZER_FLAG_INT(print_coverage, 0, "If 1, print coverage information as text"
109                                   " at exit.")
110FUZZER_FLAG_INT(dump_coverage, 0, "Deprecated."
111                                  " If 1, dump coverage information as a"
112                                  " .sancov file at exit.")
113FUZZER_FLAG_INT(handle_unstable, 0, "Experimental."
114                   " Executes every input 3 times in total if a unique feature"
115                   " is found during the first execution."
116                   " If 1, we only use the minimum hit count from the 3 runs"
117                   " to determine whether an input is interesting."
118                   " If 2, we disregard edges that are found unstable for"
119                   " feature collection.")
120FUZZER_FLAG_INT(print_unstable_stats, 0, "Experimental."
121				  " If 1, print unstable statistics at exit.")
122FUZZER_FLAG_INT(handle_segv, 1, "If 1, try to intercept SIGSEGV.")
123FUZZER_FLAG_INT(handle_bus, 1, "If 1, try to intercept SIGBUS.")
124FUZZER_FLAG_INT(handle_abrt, 1, "If 1, try to intercept SIGABRT.")
125FUZZER_FLAG_INT(handle_ill, 1, "If 1, try to intercept SIGILL.")
126FUZZER_FLAG_INT(handle_fpe, 1, "If 1, try to intercept SIGFPE.")
127FUZZER_FLAG_INT(handle_int, 1, "If 1, try to intercept SIGINT.")
128FUZZER_FLAG_INT(handle_term, 1, "If 1, try to intercept SIGTERM.")
129FUZZER_FLAG_INT(handle_xfsz, 1, "If 1, try to intercept SIGXFSZ.")
130FUZZER_FLAG_INT(handle_usr1, 1, "If 1, try to intercept SIGUSR1.")
131FUZZER_FLAG_INT(handle_usr2, 1, "If 1, try to intercept SIGUSR2.")
132FUZZER_FLAG_INT(close_fd_mask, 0, "If 1, close stdout at startup; "
133    "if 2, close stderr; if 3, close both. "
134    "Be careful, this will also close e.g. stderr of asan.")
135FUZZER_FLAG_INT(detect_leaks, 1, "If 1, and if LeakSanitizer is enabled "
136    "try to detect memory leaks during fuzzing (i.e. not only at shut down).")
137FUZZER_FLAG_INT(purge_allocator_interval, 1, "Purge allocator caches and "
138    "quarantines every <N> seconds. When rss_limit_mb is specified (>0), "
139    "purging starts when RSS exceeds 50% of rss_limit_mb. Pass "
140    "purge_allocator_interval=-1 to disable this functionality.")
141FUZZER_FLAG_INT(trace_malloc, 0, "If >= 1 will print all mallocs/frees. "
142    "If >= 2 will also print stack traces.")
143FUZZER_FLAG_INT(rss_limit_mb, 2048, "If non-zero, the fuzzer will exit upon"
144    "reaching this limit of RSS memory usage.")
145FUZZER_FLAG_INT(malloc_limit_mb, 0, "If non-zero, the fuzzer will exit "
146    "if the target tries to allocate this number of Mb with one malloc call. "
147    "If zero (default) same limit as rss_limit_mb is applied.")
148FUZZER_FLAG_STRING(exit_on_src_pos, "Exit if a newly found PC originates"
149    " from the given source location. Example: -exit_on_src_pos=foo.cc:123. "
150    "Used primarily for testing libFuzzer itself.")
151FUZZER_FLAG_STRING(exit_on_item, "Exit if an item with a given sha1 sum"
152    " was added to the corpus. "
153    "Used primarily for testing libFuzzer itself.")
154FUZZER_FLAG_INT(ignore_remaining_args, 0, "If 1, ignore all arguments passed "
155                "after this one. Useful for fuzzers that need to do their own "
156                "argument parsing.")
157FUZZER_FLAG_STRING(focus_function, "Experimental. "
158     "Fuzzing will focus on inputs that trigger calls to this function")
159
160FUZZER_DEPRECATED_FLAG(run_equivalence_server)
161FUZZER_DEPRECATED_FLAG(use_equivalence_server)
162FUZZER_FLAG_INT(analyze_dict, 0, "Experimental")
163FUZZER_DEPRECATED_FLAG(use_clang_coverage)
164FUZZER_FLAG_STRING(data_flow_trace, "Experimental: use the data flow trace")
165