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oss-fuzz: added no-fuzz target / updated build command to match actual flags #6060

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Mar 6, 2024
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oss-fuzz: added no-fuzz target / updated build command to match actual flags #6060

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13 changes: 8 additions & 5 deletions oss-fuzz/Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -3,19 +3,22 @@
# ====================
#
# Local libfuzzer client:
# make CXX=clang++-6.0 CXXFLAGS="-fsanitize=address" LIB_FUZZING_ENGINE="-fsanitize=fuzzer" oss-fuzz-client
# make CXX=clang++-6.0 CXXFLAGS="-O1 -fno-omit-frame-pointer -gline-tables-only -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION -fsanitize=address -fsanitize-address-use-after-scope -fsanitize=fuzzer-no-link -stdlib=libc++" LIB_FUZZING_ENGINE="-fsanitize=fuzzer" oss-fuzz-client

CPPCHECK_DIR=..
INCLUDE_DIR=-I ${CPPCHECK_DIR}/lib -I ${CPPCHECK_DIR}/externals/picojson -I ${CPPCHECK_DIR}/externals/simplecpp -I ${CPPCHECK_DIR}/externals/tinyxml2 -I ${CPPCHECK_DIR}/externals
SRC_FILES=main.cpp type2.cpp ${CPPCHECK_DIR}/externals/simplecpp/simplecpp.cpp ${CPPCHECK_DIR}/externals/tinyxml2/tinyxml2.cpp ${CPPCHECK_DIR}/lib/*.cpp
SRC_FILES=main.cpp ${CPPCHECK_DIR}/externals/simplecpp/simplecpp.cpp ${CPPCHECK_DIR}/externals/tinyxml2/tinyxml2.cpp ${CPPCHECK_DIR}/lib/*.cpp

all: oss-fuzz-client translate

oss-fuzz-client: main.cpp type2.cpp type2.h
${CXX} -std=c++11 -g ${CXXFLAGS} -o oss-fuzz-client ${INCLUDE_DIR} ${SRC_FILES} ${LIB_FUZZING_ENGINE}
${CXX} -std=c++11 -g ${CXXFLAGS} -o $@ ${INCLUDE_DIR} ${SRC_FILES} type2.cpp ${LIB_FUZZING_ENGINE}

no-fuzz: main.cpp
${CXX} -std=c++11 -g ${CXXFLAGS} -DNO_FUZZ -o $@ ${INCLUDE_DIR} ${SRC_FILES}

translate: translate.cpp type2.cpp type2.h
${CXX} -std=c++11 -g ${CXXFLAGS} -o translate type2.cpp translate.cpp
${CXX} -std=c++11 -g ${CXXFLAGS} -o $@ type2.cpp translate.cpp

clean:
rm -f oss-fuzz-client translate
rm -f oss-fuzz-client no-fuzz translate
46 changes: 40 additions & 6 deletions oss-fuzz/main.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,12 @@
#include "cppcheck.h"
#include "type2.h"

#ifdef NO_FUZZ
#include <cstdlib>
#include <fstream>
#include <sstream>
#endif

enum class Color;

class DummyErrorLogger : public ErrorLogger {
Expand All @@ -30,20 +36,48 @@ class DummyErrorLogger : public ErrorLogger {
const std::size_t /*value*/) override {} // FN
};

static DummyErrorLogger s_errorLogger;

static void doCheck(const std::string& code)
{
CppCheck cppcheck(s_errorLogger, false, nullptr);
cppcheck.settings().addEnabled("all");
cppcheck.settings().certainty.setEnabled(Certainty::inconclusive, true);
cppcheck.check("test.cpp", code);
}

#ifndef NO_FUZZ
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t dataSize);

int LLVMFuzzerTestOneInput(const uint8_t *data, size_t dataSize)
{
if (dataSize < 10000) {
const std::string code = generateCode2(data, dataSize);

DummyErrorLogger errorLogger;
CppCheck cppcheck(errorLogger, false, nullptr);
cppcheck.settings().addEnabled("all");
cppcheck.settings().certainty.setEnabled(Certainty::inconclusive, true);
cppcheck.check("test.cpp", code);
doCheck(code);
}
return 0;
}
#else
int main(int argc, char * argv[])
{
if (argc != 2)
return EXIT_FAILURE;

std::ifstream f(argv[1]);
if (!f.is_open())
return EXIT_FAILURE;

std::ostringstream oss;
oss << f.rdbuf();

if (!f.good())
return EXIT_FAILURE;

const std::string code = oss.str();
doCheck(code);

return EXIT_SUCCESS;
}
#endif


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