FuzzerFlags.def revision 360784 
1//===- FuzzerFlags.def - Run-time flags -------------------------*- 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// Flags. FUZZER_FLAG_INT/FUZZER_FLAG_STRING macros should be defined at the
9// point of inclusion. We are not using any flag parsing library for better
10// portability and independence.
11//===----------------------------------------------------------------------===//
12FUZZER_FLAG_INT(verbosity, 1, "Verbosity level.")
13FUZZER_FLAG_UNSIGNED(seed, 0, "Random seed. If 0, seed is generated.")
14FUZZER_FLAG_INT(runs, -1,
15            "Number of individual test runs (-1 for infinite runs).")
16FUZZER_FLAG_INT(max_len, 0, "Maximum length of the test input. "
17    "If 0, libFuzzer tries to guess a good value based on the corpus "
18    "and reports it. ")
19FUZZER_FLAG_INT(len_control, 100, "Try generating small inputs first, "
20  "then try larger inputs over time.  Specifies the rate at which the length "
21  "limit is increased (smaller == faster).  If 0, immediately try inputs with "
22  "size up to max_len. Default value is 0, if LLVMFuzzerCustomMutator is used.")
23FUZZER_FLAG_STRING(seed_inputs, "A comma-separated list of input files "
24  "to use as an additional seed corpus. Alternatively, an \"@\" followed by "
25  "the name of a file containing the comma-seperated list.")
26FUZZER_FLAG_INT(cross_over, 1, "If 1, cross over inputs.")
27FUZZER_FLAG_INT(mutate_depth, 5,
28            "Apply this number of consecutive mutations to each input.")
29FUZZER_FLAG_INT(reduce_depth, 0, "Experimental/internal. "
30                "Reduce depth if mutations lose unique features")
31FUZZER_FLAG_INT(shuffle, 1, "Shuffle inputs at startup")
32FUZZER_FLAG_INT(prefer_small, 1,
33    "If 1, always prefer smaller inputs during the corpus shuffle.")
34FUZZER_FLAG_INT(
35    timeout, 1200,
36    "Timeout in seconds (if positive). "
37    "If one unit runs more than this number of seconds the process will abort.")
38FUZZER_FLAG_INT(error_exitcode, 77, "When libFuzzer itself reports a bug "
39  "this exit code will be used.")
40FUZZER_FLAG_INT(timeout_exitcode, 70, "When libFuzzer reports a timeout "
41  "this exit code will be used.")
42FUZZER_FLAG_INT(max_total_time, 0, "If positive, indicates the maximal total "
43                                   "time in seconds to run the fuzzer.")
44FUZZER_FLAG_INT(help, 0, "Print help.")
45FUZZER_FLAG_INT(fork, 0, "Experimental mode where fuzzing happens "
46                "in a subprocess")
47FUZZER_FLAG_INT(ignore_timeouts, 1, "Ignore timeouts in fork mode")
48FUZZER_FLAG_INT(ignore_ooms, 1, "Ignore OOMs in fork mode")
49FUZZER_FLAG_INT(ignore_crashes, 0, "Ignore crashes in fork mode")
50FUZZER_FLAG_INT(merge, 0, "If 1, the 2-nd, 3-rd, etc corpora will be "
51  "merged into the 1-st corpus. Only interesting units will be taken. "
52  "This flag can be used to minimize a corpus.")
53FUZZER_FLAG_STRING(stop_file, "Stop fuzzing ASAP if this file exists")
54FUZZER_FLAG_STRING(merge_inner, "internal flag")
55FUZZER_FLAG_STRING(merge_control_file,
56                   "Specify a control file used for the merge process. "
57                   "If a merge process gets killed it tries to leave this file "
58                   "in a state suitable for resuming the merge. "
59                   "By default a temporary file will be used."
60                   "The same file can be used for multistep merge process.")
61FUZZER_FLAG_INT(minimize_crash, 0, "If 1, minimizes the provided"
62  " crash input. Use with -runs=N or -max_total_time=N to limit "
63  "the number attempts."
64  " Use with -exact_artifact_path to specify the output."
65  " Combine with ASAN_OPTIONS=dedup_token_length=3 (or similar) to ensure that"
66  " the minimized input triggers the same crash."
67  )
68FUZZER_FLAG_INT(cleanse_crash, 0, "If 1, tries to cleanse the provided"
69  " crash input to make it contain fewer original bytes."
70  " Use with -exact_artifact_path to specify the output."
71  )
72FUZZER_FLAG_INT(minimize_crash_internal_step, 0, "internal flag")
73FUZZER_FLAG_STRING(features_dir, "internal flag. Used to dump feature sets on disk."
74  "Every time a new input is added to the corpus, a corresponding file in the features_dir"
75  " is created containing the unique features of that input."
76  " Features are stored in binary format.")
77FUZZER_FLAG_INT(use_counters, 1, "Use coverage counters")
78FUZZER_FLAG_INT(use_memmem, 1,
79                "Use hints from intercepting memmem, strstr, etc")
80FUZZER_FLAG_INT(use_value_profile, 0,
81                "Experimental. Use value profile to guide fuzzing.")
82FUZZER_FLAG_INT(use_cmp, 1, "Use CMP traces to guide mutations")
83FUZZER_FLAG_INT(shrink, 0, "Experimental. Try to shrink corpus inputs.")
84FUZZER_FLAG_INT(reduce_inputs, 1,
85  "Try to reduce the size of inputs while preserving their full feature sets")
86FUZZER_FLAG_UNSIGNED(jobs, 0, "Number of jobs to run. If jobs >= 1 we spawn"
87                          " this number of jobs in separate worker processes"
88                          " with stdout/stderr redirected to fuzz-JOB.log.")
89FUZZER_FLAG_UNSIGNED(workers, 0,
90            "Number of simultaneous worker processes to run the jobs."
91            " If zero, \"min(jobs,NumberOfCpuCores()/2)\" is used.")
92FUZZER_FLAG_INT(reload, 1,
93                "Reload the main corpus every <N> seconds to get new units"
94                " discovered by other processes. If 0, disabled")
95FUZZER_FLAG_INT(report_slow_units, 10,
96    "Report slowest units if they run for more than this number of seconds.")
97FUZZER_FLAG_INT(only_ascii, 0,
98                "If 1, generate only ASCII (isprint+isspace) inputs.")
99FUZZER_FLAG_STRING(dict, "Experimental. Use the dictionary file.")
100FUZZER_FLAG_STRING(artifact_prefix, "Write fuzzing artifacts (crash, "
101                                    "timeout, or slow inputs) as "
102                                    "$(artifact_prefix)file")
103FUZZER_FLAG_STRING(exact_artifact_path,
104                   "Write the single artifact on failure (crash, timeout) "
105                   "as $(exact_artifact_path). This overrides -artifact_prefix "
106                   "and will not use checksum in the file name. Do not "
107                   "use the same path for several parallel processes.")
108FUZZER_FLAG_INT(print_pcs, 0, "If 1, print out newly covered PCs.")
109FUZZER_FLAG_INT(print_funcs, 2, "If >=1, print out at most this number of "
110                                "newly covered functions.")
111FUZZER_FLAG_INT(print_final_stats, 0, "If 1, print statistics at exit.")
112FUZZER_FLAG_INT(print_corpus_stats, 0,
113  "If 1, print statistics on corpus elements at exit.")
114FUZZER_FLAG_INT(print_coverage, 0, "If 1, print coverage information as text"
115                                   " at exit.")
116FUZZER_FLAG_INT(dump_coverage, 0, "Deprecated.")
117FUZZER_FLAG_INT(handle_segv, 1, "If 1, try to intercept SIGSEGV.")
118FUZZER_FLAG_INT(handle_bus, 1, "If 1, try to intercept SIGBUS.")
119FUZZER_FLAG_INT(handle_abrt, 1, "If 1, try to intercept SIGABRT.")
120FUZZER_FLAG_INT(handle_ill, 1, "If 1, try to intercept SIGILL.")
121FUZZER_FLAG_INT(handle_fpe, 1, "If 1, try to intercept SIGFPE.")
122FUZZER_FLAG_INT(handle_int, 1, "If 1, try to intercept SIGINT.")
123FUZZER_FLAG_INT(handle_term, 1, "If 1, try to intercept SIGTERM.")
124FUZZER_FLAG_INT(handle_xfsz, 1, "If 1, try to intercept SIGXFSZ.")
125FUZZER_FLAG_INT(handle_usr1, 1, "If 1, try to intercept SIGUSR1.")
126FUZZER_FLAG_INT(handle_usr2, 1, "If 1, try to intercept SIGUSR2.")
127FUZZER_FLAG_INT(close_fd_mask, 0, "If 1, close stdout at startup; "
128    "if 2, close stderr; if 3, close both. "
129    "Be careful, this will also close e.g. stderr of asan.")
130FUZZER_FLAG_INT(detect_leaks, 1, "If 1, and if LeakSanitizer is enabled "
131    "try to detect memory leaks during fuzzing (i.e. not only at shut down).")
132FUZZER_FLAG_INT(purge_allocator_interval, 1, "Purge allocator caches and "
133    "quarantines every <N> seconds. When rss_limit_mb is specified (>0), "
134    "purging starts when RSS exceeds 50% of rss_limit_mb. Pass "
135    "purge_allocator_interval=-1 to disable this functionality.")
136FUZZER_FLAG_INT(trace_malloc, 0, "If >= 1 will print all mallocs/frees. "
137    "If >= 2 will also print stack traces.")
138FUZZER_FLAG_INT(rss_limit_mb, 2048, "If non-zero, the fuzzer will exit upon"
139    "reaching this limit of RSS memory usage.")
140FUZZER_FLAG_INT(malloc_limit_mb, 0, "If non-zero, the fuzzer will exit "
141    "if the target tries to allocate this number of Mb with one malloc call. "
142    "If zero (default) same limit as rss_limit_mb is applied.")
143FUZZER_FLAG_STRING(exit_on_src_pos, "Exit if a newly found PC originates"
144    " from the given source location. Example: -exit_on_src_pos=foo.cc:123. "
145    "Used primarily for testing libFuzzer itself.")
146FUZZER_FLAG_STRING(exit_on_item, "Exit if an item with a given sha1 sum"
147    " was added to the corpus. "
148    "Used primarily for testing libFuzzer itself.")
149FUZZER_FLAG_INT(ignore_remaining_args, 0, "If 1, ignore all arguments passed "
150                "after this one. Useful for fuzzers that need to do their own "
151                "argument parsing.")
152FUZZER_FLAG_STRING(focus_function, "Experimental. "
153     "Fuzzing will focus on inputs that trigger calls to this function. "
154     "If -focus_function=auto and -data_flow_trace is used, libFuzzer "
155     "will choose the focus functions automatically.")
156
157FUZZER_FLAG_INT(analyze_dict, 0, "Experimental")
158FUZZER_DEPRECATED_FLAG(use_clang_coverage)
159FUZZER_FLAG_STRING(data_flow_trace, "Experimental: use the data flow trace")
160FUZZER_FLAG_STRING(collect_data_flow,
161                   "Experimental: collect the data flow trace")
162