aboutsummaryrefslogtreecommitdiffstats
path: root/lib/fuzzer/FuzzerFlags.def
blob: a11cfe4405f314556e3357ad3f0cf41edf6f7b24 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
//===- FuzzerFlags.def - Run-time flags -------------------------*- C++ -* ===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// Flags. FUZZER_FLAG_INT/FUZZER_FLAG_STRING macros should be defined at the
// point of inclusion. We are not using any flag parsing library for better
// portability and independence.
//===----------------------------------------------------------------------===//
FUZZER_FLAG_INT(verbosity, 1, "Verbosity level.")
FUZZER_FLAG_UNSIGNED(seed, 0, "Random seed. If 0, seed is generated.")
FUZZER_FLAG_INT(runs, -1,
            "Number of individual test runs (-1 for infinite runs).")
FUZZER_FLAG_INT(max_len, 0, "Maximum length of the test input. "
    "If 0, libFuzzer tries to guess a good value based on the corpus "
    "and reports it. ")
FUZZER_FLAG_INT(len_control, 100, "Try generating small inputs first, "
  "then try larger inputs over time.  Specifies the rate at which the length "
  "limit is increased (smaller == faster).  If 0, immediately try inputs with "
  "size up to max_len. Default value is 0, if LLVMFuzzerCustomMutator is used.")
FUZZER_FLAG_STRING(seed_inputs, "A comma-separated list of input files "
  "to use as an additional seed corpus. Alternatively, an \"@\" followed by "
  "the name of a file containing the comma-seperated list.")
FUZZER_FLAG_INT(cross_over, 1, "If 1, cross over inputs.")
FUZZER_FLAG_INT(mutate_depth, 5,
            "Apply this number of consecutive mutations to each input.")
FUZZER_FLAG_INT(reduce_depth, 0, "Experimental/internal. "
                "Reduce depth if mutations lose unique features")
FUZZER_FLAG_INT(shuffle, 1, "Shuffle inputs at startup")
FUZZER_FLAG_INT(prefer_small, 1,
    "If 1, always prefer smaller inputs during the corpus shuffle.")
FUZZER_FLAG_INT(
    timeout, 1200,
    "Timeout in seconds (if positive). "
    "If one unit runs more than this number of seconds the process will abort.")
FUZZER_FLAG_INT(error_exitcode, 77, "When libFuzzer itself reports a bug "
  "this exit code will be used.")
FUZZER_FLAG_INT(timeout_exitcode, 70, "When libFuzzer reports a timeout "
  "this exit code will be used.")
FUZZER_FLAG_INT(max_total_time, 0, "If positive, indicates the maximal total "
                                   "time in seconds to run the fuzzer.")
FUZZER_FLAG_INT(help, 0, "Print help.")
FUZZER_FLAG_INT(fork, 0, "Experimental mode where fuzzing happens "
                "in a subprocess")
FUZZER_FLAG_INT(ignore_timeouts, 1, "Ignore timeouts in fork mode")
FUZZER_FLAG_INT(ignore_ooms, 1, "Ignore OOMs in fork mode")
FUZZER_FLAG_INT(ignore_crashes, 0, "Ignore crashes in fork mode")
FUZZER_FLAG_INT(merge, 0, "If 1, the 2-nd, 3-rd, etc corpora will be "
  "merged into the 1-st corpus. Only interesting units will be taken. "
  "This flag can be used to minimize a corpus.")
FUZZER_FLAG_STRING(stop_file, "Stop fuzzing ASAP if this file exists")
FUZZER_FLAG_STRING(merge_inner, "internal flag")
FUZZER_FLAG_STRING(merge_control_file,
                   "Specify a control file used for the merge process. "
                   "If a merge process gets killed it tries to leave this file "
                   "in a state suitable for resuming the merge. "
                   "By default a temporary file will be used.")
FUZZER_FLAG_INT(minimize_crash, 0, "If 1, minimizes the provided"
  " crash input. Use with -runs=N or -max_total_time=N to limit "
  "the number attempts."
  " Use with -exact_artifact_path to specify the output."
  " Combine with ASAN_OPTIONS=dedup_token_length=3 (or similar) to ensure that"
  " the minimized input triggers the same crash."
  )
FUZZER_FLAG_INT(cleanse_crash, 0, "If 1, tries to cleanse the provided"
  " crash input to make it contain fewer original bytes."
  " Use with -exact_artifact_path to specify the output."
  )
FUZZER_FLAG_INT(minimize_crash_internal_step, 0, "internal flag")
FUZZER_FLAG_STRING(features_dir, "internal flag. Used to dump feature sets on disk."
  "Every time a new input is added to the corpus, a corresponding file in the features_dir"
  " is created containing the unique features of that input."
  " Features are stored in binary format.")
FUZZER_FLAG_INT(use_counters, 1, "Use coverage counters")
FUZZER_FLAG_INT(use_memmem, 1,
                "Use hints from intercepting memmem, strstr, etc")
FUZZER_FLAG_INT(use_value_profile, 0,
                "Experimental. Use value profile to guide fuzzing.")
FUZZER_FLAG_INT(use_cmp, 1, "Use CMP traces to guide mutations")
FUZZER_FLAG_INT(shrink, 0, "Experimental. Try to shrink corpus inputs.")
FUZZER_FLAG_INT(reduce_inputs, 1,
  "Try to reduce the size of inputs while preserving their full feature sets")
FUZZER_FLAG_UNSIGNED(jobs, 0, "Number of jobs to run. If jobs >= 1 we spawn"
                          " this number of jobs in separate worker processes"
                          " with stdout/stderr redirected to fuzz-JOB.log.")
FUZZER_FLAG_UNSIGNED(workers, 0,
            "Number of simultaneous worker processes to run the jobs."
            " If zero, \"min(jobs,NumberOfCpuCores()/2)\" is used.")
FUZZER_FLAG_INT(reload, 1,
                "Reload the main corpus every <N> seconds to get new units"
                " discovered by other processes. If 0, disabled")
FUZZER_FLAG_INT(report_slow_units, 10,
    "Report slowest units if they run for more than this number of seconds.")
FUZZER_FLAG_INT(only_ascii, 0,
                "If 1, generate only ASCII (isprint+isspace) inputs.")
FUZZER_FLAG_STRING(dict, "Experimental. Use the dictionary file.")
FUZZER_FLAG_STRING(artifact_prefix, "Write fuzzing artifacts (crash, "
                                    "timeout, or slow inputs) as "
                                    "$(artifact_prefix)file")
FUZZER_FLAG_STRING(exact_artifact_path,
                   "Write the single artifact on failure (crash, timeout) "
                   "as $(exact_artifact_path). This overrides -artifact_prefix "
                   "and will not use checksum in the file name. Do not "
                   "use the same path for several parallel processes.")
FUZZER_FLAG_INT(print_pcs, 0, "If 1, print out newly covered PCs.")
FUZZER_FLAG_INT(print_funcs, 2, "If >=1, print out at most this number of "
                                "newly covered functions.")
FUZZER_FLAG_INT(print_final_stats, 0, "If 1, print statistics at exit.")
FUZZER_FLAG_INT(print_corpus_stats, 0,
  "If 1, print statistics on corpus elements at exit.")
FUZZER_FLAG_INT(print_coverage, 0, "If 1, print coverage information as text"
                                   " at exit.")
FUZZER_FLAG_INT(dump_coverage, 0, "Deprecated.")
FUZZER_FLAG_INT(handle_segv, 1, "If 1, try to intercept SIGSEGV.")
FUZZER_FLAG_INT(handle_bus, 1, "If 1, try to intercept SIGBUS.")
FUZZER_FLAG_INT(handle_abrt, 1, "If 1, try to intercept SIGABRT.")
FUZZER_FLAG_INT(handle_ill, 1, "If 1, try to intercept SIGILL.")
FUZZER_FLAG_INT(handle_fpe, 1, "If 1, try to intercept SIGFPE.")
FUZZER_FLAG_INT(handle_int, 1, "If 1, try to intercept SIGINT.")
FUZZER_FLAG_INT(handle_term, 1, "If 1, try to intercept SIGTERM.")
FUZZER_FLAG_INT(handle_xfsz, 1, "If 1, try to intercept SIGXFSZ.")
FUZZER_FLAG_INT(handle_usr1, 1, "If 1, try to intercept SIGUSR1.")
FUZZER_FLAG_INT(handle_usr2, 1, "If 1, try to intercept SIGUSR2.")
FUZZER_FLAG_INT(lazy_counters, 0, "If 1, a performance optimization is"
    "enabled for the 8bit inline counters. "
    "Requires that libFuzzer successfully installs its SEGV handler")
FUZZER_FLAG_INT(close_fd_mask, 0, "If 1, close stdout at startup; "
    "if 2, close stderr; if 3, close both. "
    "Be careful, this will also close e.g. stderr of asan.")
FUZZER_FLAG_INT(detect_leaks, 1, "If 1, and if LeakSanitizer is enabled "
    "try to detect memory leaks during fuzzing (i.e. not only at shut down).")
FUZZER_FLAG_INT(purge_allocator_interval, 1, "Purge allocator caches and "
    "quarantines every <N> seconds. When rss_limit_mb is specified (>0), "
    "purging starts when RSS exceeds 50% of rss_limit_mb. Pass "
    "purge_allocator_interval=-1 to disable this functionality.")
FUZZER_FLAG_INT(trace_malloc, 0, "If >= 1 will print all mallocs/frees. "
    "If >= 2 will also print stack traces.")
FUZZER_FLAG_INT(rss_limit_mb, 2048, "If non-zero, the fuzzer will exit upon"
    "reaching this limit of RSS memory usage.")
FUZZER_FLAG_INT(malloc_limit_mb, 0, "If non-zero, the fuzzer will exit "
    "if the target tries to allocate this number of Mb with one malloc call. "
    "If zero (default) same limit as rss_limit_mb is applied.")
FUZZER_FLAG_STRING(exit_on_src_pos, "Exit if a newly found PC originates"
    " from the given source location. Example: -exit_on_src_pos=foo.cc:123. "
    "Used primarily for testing libFuzzer itself.")
FUZZER_FLAG_STRING(exit_on_item, "Exit if an item with a given sha1 sum"
    " was added to the corpus. "
    "Used primarily for testing libFuzzer itself.")
FUZZER_FLAG_INT(ignore_remaining_args, 0, "If 1, ignore all arguments passed "
                "after this one. Useful for fuzzers that need to do their own "
                "argument parsing.")
FUZZER_FLAG_STRING(focus_function, "Experimental. "
     "Fuzzing will focus on inputs that trigger calls to this function. "
     "If -focus_function=auto and -data_flow_trace is used, libFuzzer "
     "will choose the focus functions automatically.")

FUZZER_FLAG_INT(analyze_dict, 0, "Experimental")
FUZZER_DEPRECATED_FLAG(use_clang_coverage)
FUZZER_FLAG_STRING(data_flow_trace, "Experimental: use the data flow trace")
FUZZER_FLAG_STRING(collect_data_flow,
                   "Experimental: collect the data flow trace")