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//===-- FuzzerCLI.cpp -----------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/FuzzMutate/FuzzerCLI.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
void llvm::parseFuzzerCLOpts(int ArgC, char *ArgV[]) {
std::vector<const char *> CLArgs;
CLArgs.push_back(ArgV[0]);
int I = 1;
while (I < ArgC)
if (StringRef(ArgV[I++]).equals("-ignore_remaining_args=1"))
break;
while (I < ArgC)
CLArgs.push_back(ArgV[I++]);
cl::ParseCommandLineOptions(CLArgs.size(), CLArgs.data());
}
void llvm::handleExecNameEncodedBEOpts(StringRef ExecName) {
std::vector<std::string> Args{ExecName};
auto NameAndArgs = ExecName.split("--");
if (NameAndArgs.second.empty())
return;
SmallVector<StringRef, 4> Opts;
NameAndArgs.second.split(Opts, '-');
for (StringRef Opt : Opts) {
if (Opt.equals("gisel")) {
Args.push_back("-global-isel");
// For now we default GlobalISel to -O0
Args.push_back("-O0");
} else if (Opt.startswith("O")) {
Args.push_back("-" + Opt.str());
} else if (Triple(Opt).getArch()) {
Args.push_back("-mtriple=" + Opt.str());
} else {
errs() << ExecName << ": Unknown option: " << Opt << ".\n";
exit(1);
}
}
errs() << NameAndArgs.first << ": Injected args:";
for (int I = 1, E = Args.size(); I < E; ++I)
errs() << " " << Args[I];
errs() << "\n";
std::vector<const char *> CLArgs;
CLArgs.reserve(Args.size());
for (std::string &S : Args)
CLArgs.push_back(S.c_str());
cl::ParseCommandLineOptions(CLArgs.size(), CLArgs.data());
}
void llvm::handleExecNameEncodedOptimizerOpts(StringRef ExecName) {
// TODO: Refactor parts common with the 'handleExecNameEncodedBEOpts'
std::vector<std::string> Args{ExecName};
auto NameAndArgs = ExecName.split("--");
if (NameAndArgs.second.empty())
return;
SmallVector<StringRef, 4> Opts;
NameAndArgs.second.split(Opts, '-');
for (StringRef Opt : Opts) {
if (Opt.startswith("instcombine")) {
Args.push_back("-passes=instcombine");
} else if (Triple(Opt).getArch()) {
Args.push_back("-mtriple=" + Opt.str());
} else {
errs() << ExecName << ": Unknown option: " << Opt << ".\n";
exit(1);
}
}
errs() << NameAndArgs.first << ": Injected args:";
for (int I = 1, E = Args.size(); I < E; ++I)
errs() << " " << Args[I];
errs() << "\n";
std::vector<const char *> CLArgs;
CLArgs.reserve(Args.size());
for (std::string &S : Args)
CLArgs.push_back(S.c_str());
cl::ParseCommandLineOptions(CLArgs.size(), CLArgs.data());
}
int llvm::runFuzzerOnInputs(int ArgC, char *ArgV[], FuzzerTestFun TestOne,
FuzzerInitFun Init) {
errs() << "*** This tool was not linked to libFuzzer.\n"
<< "*** No fuzzing will be performed.\n";
if (int RC = Init(&ArgC, &ArgV)) {
errs() << "Initialization failed\n";
return RC;
}
for (int I = 1; I < ArgC; ++I) {
StringRef Arg(ArgV[I]);
if (Arg.startswith("-")) {
if (Arg.equals("-ignore_remaining_args=1"))
break;
continue;
}
auto BufOrErr = MemoryBuffer::getFile(Arg, /*FileSize-*/ -1,
/*RequiresNullTerminator=*/false);
if (std::error_code EC = BufOrErr.getError()) {
errs() << "Error reading file: " << Arg << ": " << EC.message() << "\n";
return 1;
}
std::unique_ptr<MemoryBuffer> Buf = std::move(BufOrErr.get());
errs() << "Running: " << Arg << " (" << Buf->getBufferSize() << " bytes)\n";
TestOne(reinterpret_cast<const uint8_t *>(Buf->getBufferStart()),
Buf->getBufferSize());
}
return 0;
}
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