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Add automatic libFuzzer linking + fuzz test

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This commit is contained in:
Johan Engelen 2017-07-20 22:06:46 +02:00
parent 4f5bd4a9bc
commit 800dc5a97f
3 changed files with 139 additions and 0 deletions
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52
driver/linker-gcc.cpp
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@ -45,6 +45,8 @@ public:
private:
virtual void addSanitizers();
virtual void addASanLinkFlags();
virtual void addFuzzLinkFlags();
virtual void addCppStdlibLinkFlags();
virtual void addUserSwitches();
void addDefaultLibs();
@ -260,11 +262,61 @@ void ArgsBuilder::addASanLinkFlags() {
}
}
// Adds all required link flags for -fsanitize=fuzzer when libFuzzer library is
// found.
void ArgsBuilder::addFuzzLinkFlags() {
std::string searchPaths[] = {
exe_path::prependLibDir("libFuzzer.a"),
exe_path::prependLibDir("libLLVMFuzzer.a"),
};
for (const auto &filepath : searchPaths) {
if (llvm::sys::fs::exists(filepath)) {
args.push_back(filepath);
// libFuzzer requires the C++ std library, but only add the link flags
// when libFuzzer was found.
addCppStdlibLinkFlags();
return;
}
}
}
void ArgsBuilder::addCppStdlibLinkFlags() {
switch (global.params.targetTriple->getOS()) {
case llvm::Triple::Linux:
if (global.params.targetTriple->getEnvironment() == llvm::Triple::Android) {
args.push_back("-lc++");
} else {
args.push_back("-lstdc++");
}
break;
case llvm::Triple::Solaris:
case llvm::Triple::NetBSD:
case llvm::Triple::OpenBSD:
case llvm::Triple::DragonFly:
args.push_back("-lstdc++");
break;
case llvm::Triple::Darwin:
case llvm::Triple::MacOSX:
case llvm::Triple::FreeBSD:
args.push_back("-lc++");
break;
default:
// Don't know: do nothing so the user can step in
break;
}
}
void ArgsBuilder::addSanitizers() {
if (opts::isSanitizerEnabled(opts::AddressSanitizer)) {
addASanLinkFlags();
}
if (opts::isSanitizerEnabled(opts::FuzzSanitizer)) {
addFuzzLinkFlags();
}
// TODO: instead of this, we should link with our own sanitizer libraries
// because LDC's LLVM version could be different from the system clang.
if (opts::isSanitizerEnabled(opts::MemorySanitizer)) {