// main() and flags.
//===----------------------------------------------------------------------===//
+#include "FuzzerInterface.h"
#include "FuzzerInternal.h"
-#include <climits>
-#include <cstring>
-#include <unistd.h>
-#include <iostream>
-#include <thread>
-#include <atomic>
-
-// ASAN options:
-// * don't dump the coverage to disk.
-// * enable coverage by default.
-extern "C" const char *__asan_default_options() {
- return "coverage_pcs=0:coverage=1";
-}
-
-// Program arguments.
-struct FlagDescription {
- const char *Name;
- const char *Description;
- int Default;
- int *Flag;
-};
-
-struct {
-#define FUZZER_FLAG(Type, Name, Default, Description) Type Name;
-#include "FuzzerFlags.def"
-#undef FUZZER_FLAG
-} Flags;
-
-static FlagDescription FlagDescriptions [] {
-#define FUZZER_FLAG(Type, Name, Default, Description) {#Name, Description, Default, &Flags.Name},
-#include "FuzzerFlags.def"
-#undef FUZZER_FLAG
-};
-
-static const size_t kNumFlags =
- sizeof(FlagDescriptions) / sizeof(FlagDescriptions[0]);
-
-static std::vector<std::string> inputs;
-static const char *ProgName;
-
-static void PrintHelp() {
- std::cerr << "Usage: " << ProgName
- << " [-flag1=val1 [-flag2=val2 ...] ] [dir1 [dir2 ...] ]\n";
- std::cerr << "\nFlags: (strictly in form -flag=value)\n";
- size_t MaxFlagLen = 0;
- for (size_t F = 0; F < kNumFlags; F++)
- MaxFlagLen = std::max(strlen(FlagDescriptions[F].Name), MaxFlagLen);
-
- for (size_t F = 0; F < kNumFlags; F++) {
- const auto &D = FlagDescriptions[F];
- std::cerr << " " << D.Name;
- for (size_t i = 0, n = MaxFlagLen - strlen(D.Name); i < n; i++)
- std::cerr << " ";
- std::cerr << "\t";
- std::cerr << D.Default << "\t" << D.Description << "\n";
- }
-}
-
-static const char *FlagValue(const char *Param, const char *Name) {
- size_t Len = strlen(Name);
- if (Param[0] == '-' && strstr(Param + 1, Name) == Param + 1 &&
- Param[Len + 1] == '=')
- return &Param[Len + 2];
- return nullptr;
-}
-
-static bool ParseOneFlag(const char *Param) {
- if (Param[0] != '-') return false;
- for (size_t F = 0; F < kNumFlags; F++) {
- const char *Name = FlagDescriptions[F].Name;
- const char *Str = FlagValue(Param, Name);
- if (Str) {
- int Val = std::stol(Str);
- *FlagDescriptions[F].Flag = Val;
- if (Flags.verbosity >= 2)
- std::cerr << "Flag: " << Name << " " << Val << "\n";
- return true;
- }
- }
- PrintHelp();
- exit(1);
-}
-
-// We don't use any library to minimize dependencies.
-static void ParseFlags(int argc, char **argv) {
- for (size_t F = 0; F < kNumFlags; F++)
- *FlagDescriptions[F].Flag = FlagDescriptions[F].Default;
- for (int A = 1; A < argc; A++) {
- if (ParseOneFlag(argv[A])) continue;
- inputs.push_back(argv[A]);
- }
-}
-
-static void WorkerThread(const std::string &Cmd, std::atomic<int> *Counter,
- int NumJobs) {
- while (true) {
- int C = (*Counter)++;
- if (C >= NumJobs) return;
- std::string ToRun = Cmd + " > fuzz-" + std::to_string(C) + ".log 2>&1\n";
- if (Flags.verbosity)
- std::cerr << ToRun;
- system(ToRun.c_str());
- }
-}
-
-static int RunInMultipleProcesses(int argc, char **argv, int NumWorkers,
- int NumJobs) {
- std::atomic<int> Counter(0);
- std::string Cmd;
- for (int i = 0; i < argc; i++) {
- if (FlagValue(argv[i], "jobs") || FlagValue(argv[i], "workers")) continue;
- Cmd += argv[i];
- Cmd += " ";
- }
- std::vector<std::thread> V;
- for (int i = 0; i < NumWorkers; i++)
- V.push_back(std::thread(WorkerThread, Cmd, &Counter, NumJobs));
- for (auto &T : V)
- T.join();
- return 0;
-}
+// This function should be defined by the user.
+extern "C" void LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size);
int main(int argc, char **argv) {
- using namespace fuzzer;
-
- ProgName = argv[0];
- ParseFlags(argc, argv);
- if (Flags.help) {
- PrintHelp();
- return 0;
- }
-
- if (Flags.workers > 0 && Flags.jobs > 0)
- return RunInMultipleProcesses(argc, argv, Flags.workers, Flags.jobs);
-
- Fuzzer::FuzzingOptions Options;
- Options.Verbosity = Flags.verbosity;
- Options.MaxLen = Flags.max_len;
- Options.DoCrossOver = Flags.cross_over;
- Options.MutateDepth = Flags.mutate_depth;
- Options.ExitOnFirst = Flags.exit_on_first;
- Options.UseFullCoverageSet = Flags.use_full_coverage_set;
- if (!inputs.empty())
- Options.OutputCorpus = inputs[0];
- Fuzzer F(Options);
-
- unsigned seed = Flags.seed;
- // Initialize seed.
- if (seed == 0)
- seed = time(0) * 10000 + getpid();
- if (Flags.verbosity)
- std::cerr << "Seed: " << seed << "\n";
- srand(seed);
-
- // Timer
- if (Flags.timeout > 0)
- SetTimer(Flags.timeout);
-
- for (auto &inp : inputs)
- F.ReadDir(inp);
-
- if (F.CorpusSize() == 0)
- F.AddToCorpus(Unit()); // Can't fuzz empty corpus, so add an empty input.
- F.ShuffleAndMinimize();
- if (Flags.save_minimized_corpus)
- F.SaveCorpus();
- F.Loop(Flags.iterations < 0 ? INT_MAX : Flags.iterations);
- if (Flags.verbosity)
- std::cerr << "Done\n";
- return 1;
+ return fuzzer::FuzzerDriver(argc, argv, LLVMFuzzerTestOneInput);
}