morehouse created this revision. Herald added subscribers: kristof.beyls, aemerson.
Arguments can be specified after -ignore_remaining_args=1 to modify the compiler invocation. For example, the following command-line will fuzz LLVM with a custom optimization level and target triple: clang-proto-fuzzer CORPUS/ -ignore_remaining_args -O3 \ -triple arm64-apple-ios9 https://reviews.llvm.org/D36882 Files: clang/tools/clang-fuzzer/ExampleClangProtoFuzzer.cpp Index: clang/tools/clang-fuzzer/ExampleClangProtoFuzzer.cpp =================================================================== --- clang/tools/clang-fuzzer/ExampleClangProtoFuzzer.cpp +++ clang/tools/clang-fuzzer/ExampleClangProtoFuzzer.cpp @@ -20,9 +20,24 @@ #include "src/libfuzzer/libfuzzer_macro.h" +#include "llvm/ADT/StringRef.h" + using namespace clang_fuzzer; +static std::vector<const char *> CLArgs; + +extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv) { + CLArgs.push_back("-O2"); + int I; + for (I = 1; I < *argc; I++) + if (llvm::StringRef((*argv)[I]).equals("-ignore_remaining_args=1")) + break; + for (I++; I < *argc; I++) + CLArgs.push_back((*argv)[I]); + return 0; +} + DEFINE_BINARY_PROTO_FUZZER(const Function& input) { auto S = FunctionToString(input); - HandleCXX(S, {"-O2"}); + HandleCXX(S, CLArgs); }
Index: clang/tools/clang-fuzzer/ExampleClangProtoFuzzer.cpp =================================================================== --- clang/tools/clang-fuzzer/ExampleClangProtoFuzzer.cpp +++ clang/tools/clang-fuzzer/ExampleClangProtoFuzzer.cpp @@ -20,9 +20,24 @@ #include "src/libfuzzer/libfuzzer_macro.h" +#include "llvm/ADT/StringRef.h" + using namespace clang_fuzzer; +static std::vector<const char *> CLArgs; + +extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv) { + CLArgs.push_back("-O2"); + int I; + for (I = 1; I < *argc; I++) + if (llvm::StringRef((*argv)[I]).equals("-ignore_remaining_args=1")) + break; + for (I++; I < *argc; I++) + CLArgs.push_back((*argv)[I]); + return 0; +} + DEFINE_BINARY_PROTO_FUZZER(const Function& input) { auto S = FunctionToString(input); - HandleCXX(S, {"-O2"}); + HandleCXX(S, CLArgs); }
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