1 //===- FuzzerFlags.def - Run-time flags -------------------------*- C++ -* ===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
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 //===----------------------------------------------------------------------===//
13 FUZZER_FLAG_INT(verbosity, 1, "Verbosity level.")
14 FUZZER_FLAG_UNSIGNED(seed, 0, "Random seed. If 0, seed is generated.")
15 FUZZER_FLAG_INT(runs, -1,
16 "Number of individual test runs (-1 for infinite runs).")
17 FUZZER_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 "
20 FUZZER_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.")
24 FUZZER_FLAG_INT(cross_over, 1, "If 1, cross over inputs.")
25 FUZZER_FLAG_INT(mutate_depth, 5,
26 "Apply this number of consecutive mutations to each input.")
27 FUZZER_FLAG_INT(reduce_depth, 0, "Experimental/internal. "
28 "Reduce depth if mutations lose unique features")
29 FUZZER_FLAG_INT(shuffle, 1, "Shuffle inputs at startup")
30 FUZZER_FLAG_INT(prefer_small, 1,
31 "If 1, always prefer smaller inputs during the corpus shuffle.")
34 "Timeout in seconds (if positive). "
35 "If one unit runs more than this number of seconds the process will abort.")
36 FUZZER_FLAG_INT(error_exitcode, 77, "When libFuzzer itself reports a bug "
37 "this exit code will be used.")
38 FUZZER_FLAG_INT(timeout_exitcode, 77, "When libFuzzer reports a timeout "
39 "this exit code will be used.")
40 FUZZER_FLAG_INT(max_total_time, 0, "If positive, indicates the maximal total "
41 "time in seconds to run the fuzzer.")
42 FUZZER_FLAG_INT(help, 0, "Print help.")
43 FUZZER_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.")
46 FUZZER_FLAG_STRING(merge_inner, "internal flag")
47 FUZZER_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.")
52 FUZZER_FLAG_STRING(save_coverage_summary, "Experimental:"
53 " save coverage summary to a given file."
54 " Used with -merge=1")
55 FUZZER_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")
59 FUZZER_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."
66 FUZZER_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."
70 FUZZER_FLAG_INT(minimize_crash_internal_step, 0, "internal flag")
71 FUZZER_FLAG_INT(use_counters, 1, "Use coverage counters")
72 FUZZER_FLAG_INT(use_memmem, 1,
73 "Use hints from intercepting memmem, strstr, etc")
74 FUZZER_FLAG_INT(use_value_profile, 0,
75 "Experimental. Use value profile to guide fuzzing.")
76 FUZZER_FLAG_INT(use_cmp, 1, "Use CMP traces to guide mutations")
77 FUZZER_FLAG_INT(shrink, 0, "Experimental. Try to shrink corpus inputs.")
78 FUZZER_FLAG_INT(reduce_inputs, 1,
79 "Try to reduce the size of inputs while preserving their full feature sets")
80 FUZZER_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.")
83 FUZZER_FLAG_UNSIGNED(workers, 0,
84 "Number of simultaneous worker processes to run the jobs."
85 " If zero, \"min(jobs,NumberOfCpuCores()/2)\" is used.")
86 FUZZER_FLAG_INT(reload, 1,
87 "Reload the main corpus every <N> seconds to get new units"
88 " discovered by other processes. If 0, disabled")
89 FUZZER_FLAG_INT(report_slow_units, 10,
90 "Report slowest units if they run for more than this number of seconds.")
91 FUZZER_FLAG_INT(only_ascii, 0,
92 "If 1, generate only ASCII (isprint+isspace) inputs.")
93 FUZZER_FLAG_STRING(dict, "Experimental. Use the dictionary file.")
94 FUZZER_FLAG_STRING(artifact_prefix, "Write fuzzing artifacts (crash, "
95 "timeout, or slow inputs) as "
96 "$(artifact_prefix)file")
97 FUZZER_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.")
102 FUZZER_FLAG_INT(print_pcs, 0, "If 1, print out newly covered PCs.")
103 FUZZER_FLAG_INT(print_funcs, 2, "If >=1, print out at most this number of "
104 "newly covered functions.")
105 FUZZER_FLAG_INT(print_final_stats, 0, "If 1, print statistics at exit.")
106 FUZZER_FLAG_INT(print_corpus_stats, 0,
107 "If 1, print statistics on corpus elements at exit.")
108 FUZZER_FLAG_INT(print_coverage, 0, "If 1, print coverage information as text"
110 FUZZER_FLAG_INT(dump_coverage, 0, "Deprecated."
111 " If 1, dump coverage information as a"
112 " .sancov file at exit.")
113 FUZZER_FLAG_INT(handle_segv, 1, "If 1, try to intercept SIGSEGV.")
114 FUZZER_FLAG_INT(handle_bus, 1, "If 1, try to intercept SIGBUS.")
115 FUZZER_FLAG_INT(handle_abrt, 1, "If 1, try to intercept SIGABRT.")
116 FUZZER_FLAG_INT(handle_ill, 1, "If 1, try to intercept SIGILL.")
117 FUZZER_FLAG_INT(handle_fpe, 1, "If 1, try to intercept SIGFPE.")
118 FUZZER_FLAG_INT(handle_int, 1, "If 1, try to intercept SIGINT.")
119 FUZZER_FLAG_INT(handle_term, 1, "If 1, try to intercept SIGTERM.")
120 FUZZER_FLAG_INT(handle_xfsz, 1, "If 1, try to intercept SIGXFSZ.")
121 FUZZER_FLAG_INT(handle_usr1, 1, "If 1, try to intercept SIGUSR1.")
122 FUZZER_FLAG_INT(handle_usr2, 1, "If 1, try to intercept SIGUSR2.")
123 FUZZER_FLAG_INT(close_fd_mask, 0, "If 1, close stdout at startup; "
124 "if 2, close stderr; if 3, close both. "
125 "Be careful, this will also close e.g. stderr of asan.")
126 FUZZER_FLAG_INT(detect_leaks, 1, "If 1, and if LeakSanitizer is enabled "
127 "try to detect memory leaks during fuzzing (i.e. not only at shut down).")
128 FUZZER_FLAG_INT(purge_allocator_interval, 1, "Purge allocator caches and "
129 "quarantines every <N> seconds. When rss_limit_mb is specified (>0), "
130 "purging starts when RSS exceeds 50% of rss_limit_mb. Pass "
131 "purge_allocator_interval=-1 to disable this functionality.")
132 FUZZER_FLAG_INT(trace_malloc, 0, "If >= 1 will print all mallocs/frees. "
133 "If >= 2 will also print stack traces.")
134 FUZZER_FLAG_INT(rss_limit_mb, 2048, "If non-zero, the fuzzer will exit upon"
135 "reaching this limit of RSS memory usage.")
136 FUZZER_FLAG_INT(malloc_limit_mb, 0, "If non-zero, the fuzzer will exit "
137 "if the target tries to allocate this number of Mb with one malloc call. "
138 "If zero (default) same limit as rss_limit_mb is applied.")
139 FUZZER_FLAG_STRING(exit_on_src_pos, "Exit if a newly found PC originates"
140 " from the given source location. Example: -exit_on_src_pos=foo.cc:123. "
141 "Used primarily for testing libFuzzer itself.")
142 FUZZER_FLAG_STRING(exit_on_item, "Exit if an item with a given sha1 sum"
143 " was added to the corpus. "
144 "Used primarily for testing libFuzzer itself.")
145 FUZZER_FLAG_INT(ignore_remaining_args, 0, "If 1, ignore all arguments passed "
146 "after this one. Useful for fuzzers that need to do their own "
148 FUZZER_FLAG_STRING(focus_function, "Experimental. "
149 "Fuzzing will focus on inputs that trigger calls to this function")
151 FUZZER_DEPRECATED_FLAG(run_equivalence_server)
152 FUZZER_DEPRECATED_FLAG(use_equivalence_server)
153 FUZZER_FLAG_INT(analyze_dict, 0, "Experimental")
154 FUZZER_DEPRECATED_FLAG(use_clang_coverage)
155 FUZZER_FLAG_STRING(data_flow_trace, "Experimental: use the data flow trace")