forked from OSchip/llvm-project
203 lines
12 KiB
Modula-2
203 lines
12 KiB
Modula-2
//===- FuzzerFlags.def - Run-time flags -------------------------*- C++ -* ===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// Flags. FUZZER_FLAG_INT/FUZZER_FLAG_STRING macros should be defined at the
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// point of inclusion. We are not using any flag parsing library for better
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// portability and independence.
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//===----------------------------------------------------------------------===//
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FUZZER_FLAG_INT(verbosity, 1, "Verbosity level.")
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FUZZER_FLAG_UNSIGNED(seed, 0, "Random seed. If 0, seed is generated.")
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FUZZER_FLAG_INT(runs, -1,
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"Number of individual test runs (-1 for infinite runs).")
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FUZZER_FLAG_INT(max_len, 0, "Maximum length of the test input. "
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"If 0, libFuzzer tries to guess a good value based on the corpus "
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"and reports it. ")
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FUZZER_FLAG_INT(len_control, 100, "Try generating small inputs first, "
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"then try larger inputs over time. Specifies the rate at which the length "
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"limit is increased (smaller == faster). If 0, immediately try inputs with "
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"size up to max_len. Default value is 0, if LLVMFuzzerCustomMutator is used.")
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FUZZER_FLAG_STRING(seed_inputs, "A comma-separated list of input files "
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"to use as an additional seed corpus. Alternatively, an \"@\" followed by "
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"the name of a file containing the comma-separated list.")
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FUZZER_FLAG_INT(keep_seed, 0, "If 1, keep seed inputs in the corpus even if "
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"they do not produce new coverage. When used with |reduce_inputs==1|, the "
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"seed inputs will never be reduced. This option can be useful when seeds are"
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"not properly formed for the fuzz target but still have useful snippets.")
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FUZZER_FLAG_INT(cross_over, 1, "If 1, cross over inputs.")
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FUZZER_FLAG_INT(cross_over_uniform_dist, 0, "Experimental. If 1, use a "
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"uniform probability distribution when choosing inputs to cross over with. "
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"Some of the inputs in the corpus may never get chosen for mutation "
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"depending on the input mutation scheduling policy. With this flag, all "
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"inputs, regardless of the input mutation scheduling policy, can be chosen "
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"as an input to cross over with. This can be particularly useful with "
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"|keep_seed==1|; all the initial seed inputs, even though they do not "
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"increase coverage because they are not properly formed, will still be "
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"chosen as an input to cross over with.")
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FUZZER_FLAG_INT(mutate_depth, 5,
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"Apply this number of consecutive mutations to each input.")
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FUZZER_FLAG_INT(reduce_depth, 0, "Experimental/internal. "
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"Reduce depth if mutations lose unique features")
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FUZZER_FLAG_INT(shuffle, 1, "Shuffle inputs at startup")
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FUZZER_FLAG_INT(prefer_small, 1,
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"If 1, always prefer smaller inputs during the corpus shuffle.")
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FUZZER_FLAG_INT(
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timeout, 1200,
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"Timeout in seconds (if positive). "
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"If one unit runs more than this number of seconds the process will abort.")
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FUZZER_FLAG_INT(error_exitcode, 77, "When libFuzzer itself reports a bug "
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"this exit code will be used.")
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FUZZER_FLAG_INT(timeout_exitcode, 70, "When libFuzzer reports a timeout "
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"this exit code will be used.")
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FUZZER_FLAG_INT(max_total_time, 0, "If positive, indicates the maximal total "
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"time in seconds to run the fuzzer.")
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FUZZER_FLAG_INT(help, 0, "Print help.")
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FUZZER_FLAG_INT(fork, 0, "Experimental mode where fuzzing happens "
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"in a subprocess")
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FUZZER_FLAG_INT(ignore_timeouts, 1, "Ignore timeouts in fork mode")
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FUZZER_FLAG_INT(ignore_ooms, 1, "Ignore OOMs in fork mode")
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FUZZER_FLAG_INT(ignore_crashes, 0, "Ignore crashes in fork mode")
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FUZZER_FLAG_INT(merge, 0, "If 1, the 2-nd, 3-rd, etc corpora will be "
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"merged into the 1-st corpus. Only interesting units will be taken. "
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"This flag can be used to minimize a corpus.")
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FUZZER_FLAG_STRING(stop_file, "Stop fuzzing ASAP if this file exists")
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FUZZER_FLAG_STRING(merge_inner, "internal flag")
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FUZZER_FLAG_STRING(merge_control_file,
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"Specify a control file used for the merge process. "
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"If a merge process gets killed it tries to leave this file "
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"in a state suitable for resuming the merge. "
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"By default a temporary file will be used."
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"The same file can be used for multistep merge process.")
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FUZZER_FLAG_INT(minimize_crash, 0, "If 1, minimizes the provided"
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" crash input. Use with -runs=N or -max_total_time=N to limit "
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"the number attempts."
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" Use with -exact_artifact_path to specify the output."
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" Combine with ASAN_OPTIONS=dedup_token_length=3 (or similar) to ensure that"
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" the minimized input triggers the same crash."
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)
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FUZZER_FLAG_INT(cleanse_crash, 0, "If 1, tries to cleanse the provided"
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" crash input to make it contain fewer original bytes."
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" Use with -exact_artifact_path to specify the output."
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)
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FUZZER_FLAG_INT(minimize_crash_internal_step, 0, "internal flag")
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FUZZER_FLAG_STRING(features_dir, "internal flag. Used to dump feature sets on disk."
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"Every time a new input is added to the corpus, a corresponding file in the features_dir"
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" is created containing the unique features of that input."
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" Features are stored in binary format.")
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FUZZER_FLAG_STRING(mutation_graph_file, "Saves a graph (in DOT format) to"
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" mutation_graph_file. The graph contains a vertex for each input that has"
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" unique coverage; directed edges are provided between parents and children"
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" where the child has unique coverage, and are recorded with the type of"
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" mutation that caused the child.")
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FUZZER_FLAG_INT(use_counters, 1, "Use coverage counters")
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FUZZER_FLAG_INT(use_memmem, 1,
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"Use hints from intercepting memmem, strstr, etc")
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FUZZER_FLAG_INT(use_value_profile, 0,
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"Experimental. Use value profile to guide fuzzing.")
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FUZZER_FLAG_INT(use_cmp, 1, "Use CMP traces to guide mutations")
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FUZZER_FLAG_INT(shrink, 0, "Experimental. Try to shrink corpus inputs.")
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FUZZER_FLAG_INT(reduce_inputs, 1,
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"Try to reduce the size of inputs while preserving their full feature sets")
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FUZZER_FLAG_UNSIGNED(jobs, 0, "Number of jobs to run. If jobs >= 1 we spawn"
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" this number of jobs in separate worker processes"
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" with stdout/stderr redirected to fuzz-JOB.log.")
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FUZZER_FLAG_UNSIGNED(workers, 0,
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"Number of simultaneous worker processes to run the jobs."
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" If zero, \"min(jobs,NumberOfCpuCores()/2)\" is used.")
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FUZZER_FLAG_INT(reload, 1,
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"Reload the main corpus every <N> seconds to get new units"
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" discovered by other processes. If 0, disabled")
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FUZZER_FLAG_INT(report_slow_units, 10,
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"Report slowest units if they run for more than this number of seconds.")
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FUZZER_FLAG_INT(only_ascii, 0,
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"If 1, generate only ASCII (isprint+isspace) inputs.")
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FUZZER_FLAG_STRING(dict, "Experimental. Use the dictionary file.")
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FUZZER_FLAG_STRING(artifact_prefix, "Write fuzzing artifacts (crash, "
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"timeout, or slow inputs) as "
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"$(artifact_prefix)file")
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FUZZER_FLAG_STRING(exact_artifact_path,
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"Write the single artifact on failure (crash, timeout) "
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"as $(exact_artifact_path). This overrides -artifact_prefix "
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"and will not use checksum in the file name. Do not "
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"use the same path for several parallel processes.")
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FUZZER_FLAG_INT(print_pcs, 0, "If 1, print out newly covered PCs.")
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FUZZER_FLAG_INT(print_funcs, 2, "If >=1, print out at most this number of "
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"newly covered functions.")
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FUZZER_FLAG_INT(print_final_stats, 0, "If 1, print statistics at exit.")
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FUZZER_FLAG_INT(print_corpus_stats, 0,
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"If 1, print statistics on corpus elements at exit.")
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FUZZER_FLAG_INT(print_coverage, 0, "If 1, print coverage information as text"
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" at exit.")
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FUZZER_FLAG_INT(print_full_coverage, 0, "If 1, print full coverage information "
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"(all branches) as text at exit.")
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FUZZER_FLAG_INT(dump_coverage, 0, "Deprecated.")
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FUZZER_FLAG_INT(handle_segv, 1, "If 1, try to intercept SIGSEGV.")
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FUZZER_FLAG_INT(handle_bus, 1, "If 1, try to intercept SIGBUS.")
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FUZZER_FLAG_INT(handle_abrt, 1, "If 1, try to intercept SIGABRT.")
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FUZZER_FLAG_INT(handle_ill, 1, "If 1, try to intercept SIGILL.")
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FUZZER_FLAG_INT(handle_fpe, 1, "If 1, try to intercept SIGFPE.")
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FUZZER_FLAG_INT(handle_int, 1, "If 1, try to intercept SIGINT.")
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FUZZER_FLAG_INT(handle_term, 1, "If 1, try to intercept SIGTERM.")
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FUZZER_FLAG_INT(handle_xfsz, 1, "If 1, try to intercept SIGXFSZ.")
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FUZZER_FLAG_INT(handle_usr1, 1, "If 1, try to intercept SIGUSR1.")
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FUZZER_FLAG_INT(handle_usr2, 1, "If 1, try to intercept SIGUSR2.")
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FUZZER_FLAG_INT(handle_winexcept, 1, "If 1, try to intercept uncaught Windows "
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"Visual C++ Exceptions.")
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FUZZER_FLAG_INT(close_fd_mask, 0, "If 1, close stdout at startup; "
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"if 2, close stderr; if 3, close both. "
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"Be careful, this will also close e.g. stderr of asan.")
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FUZZER_FLAG_INT(detect_leaks, 1, "If 1, and if LeakSanitizer is enabled "
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"try to detect memory leaks during fuzzing (i.e. not only at shut down).")
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FUZZER_FLAG_INT(purge_allocator_interval, 1, "Purge allocator caches and "
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"quarantines every <N> seconds. When rss_limit_mb is specified (>0), "
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"purging starts when RSS exceeds 50% of rss_limit_mb. Pass "
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"purge_allocator_interval=-1 to disable this functionality.")
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FUZZER_FLAG_INT(trace_malloc, 0, "If >= 1 will print all mallocs/frees. "
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"If >= 2 will also print stack traces.")
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FUZZER_FLAG_INT(rss_limit_mb, 2048, "If non-zero, the fuzzer will exit upon"
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"reaching this limit of RSS memory usage.")
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FUZZER_FLAG_INT(malloc_limit_mb, 0, "If non-zero, the fuzzer will exit "
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"if the target tries to allocate this number of Mb with one malloc call. "
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"If zero (default) same limit as rss_limit_mb is applied.")
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FUZZER_FLAG_STRING(exit_on_src_pos, "Exit if a newly found PC originates"
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" from the given source location. Example: -exit_on_src_pos=foo.cc:123. "
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"Used primarily for testing libFuzzer itself.")
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FUZZER_FLAG_STRING(exit_on_item, "Exit if an item with a given sha1 sum"
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" was added to the corpus. "
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"Used primarily for testing libFuzzer itself.")
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FUZZER_FLAG_INT(ignore_remaining_args, 0, "If 1, ignore all arguments passed "
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"after this one. Useful for fuzzers that need to do their own "
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"argument parsing.")
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FUZZER_FLAG_STRING(focus_function, "Experimental. "
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"Fuzzing will focus on inputs that trigger calls to this function. "
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"If -focus_function=auto and -data_flow_trace is used, libFuzzer "
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"will choose the focus functions automatically. Disables -entropic when "
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"specified.")
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FUZZER_FLAG_INT(entropic, 1, "Enables entropic power schedule.")
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FUZZER_FLAG_INT(entropic_feature_frequency_threshold, 0xFF, "Experimental. If "
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"entropic is enabled, all features which are observed less often than "
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"the specified value are considered as rare.")
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FUZZER_FLAG_INT(entropic_number_of_rarest_features, 100, "Experimental. If "
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"entropic is enabled, we keep track of the frequencies only for the "
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"Top-X least abundant features (union features that are considered as "
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"rare).")
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FUZZER_FLAG_INT(entropic_scale_per_exec_time, 0, "Experimental. If 1, "
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"the Entropic power schedule gets scaled based on the input execution "
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"time. Inputs with lower execution time get scheduled more (up to 30x). "
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"Note that, if 1, fuzzer stops from being deterministic even if a "
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"non-zero random seed is given.")
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FUZZER_FLAG_INT(analyze_dict, 0, "Experimental")
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FUZZER_DEPRECATED_FLAG(use_clang_coverage)
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FUZZER_FLAG_STRING(data_flow_trace, "Experimental: use the data flow trace")
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FUZZER_FLAG_STRING(collect_data_flow,
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"Experimental: collect the data flow trace")
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FUZZER_FLAG_INT(create_missing_dirs, 0, "Automatically attempt to create "
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"directories for arguments that would normally expect them to already "
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"exist (i.e. artifact_prefix, exact_artifact_path, features_dir, corpus)")
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