[tsan] add ThreadSanitizer linker flags on Linux and also copy the tsan-rt into the appropriate place at build time
llvm-svn: 156906
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index 887c64c..fcfee50 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -1304,6 +1304,27 @@
}
}
+/// If ThreadSanitizer is enabled, add appropriate linker flags (Linux).
+/// This needs to be called before we add the C run-time (malloc, etc).
+static void addTsanRTLinux(const ToolChain &TC, const ArgList &Args,
+ ArgStringList &CmdArgs) {
+ if (!Args.hasFlag(options::OPT_fthread_sanitizer,
+ options::OPT_fno_thread_sanitizer, false))
+ return;
+ if (!Args.hasArg(options::OPT_shared)) {
+ // LibTsan is "libclang_rt.tsan-<ArchName>.a" in the Linux library
+ // resource directory.
+ SmallString<128> LibTsan(TC.getDriver().ResourceDir);
+ llvm::sys::path::append(LibTsan, "lib", "linux",
+ (Twine("libclang_rt.tsan-") +
+ TC.getArchName() + ".a"));
+ CmdArgs.push_back(Args.MakeArgString(LibTsan));
+ CmdArgs.push_back("-lpthread");
+ CmdArgs.push_back("-ldl");
+ CmdArgs.push_back("-export-dynamic");
+ }
+}
+
static bool shouldUseFramePointer(const ArgList &Args,
const llvm::Triple &Triple) {
if (Arg *A = Args.getLastArg(options::OPT_fno_omit_frame_pointer,
@@ -5330,6 +5351,7 @@
// Call this before we add the C run-time.
addAsanRTLinux(getToolChain(), Args, CmdArgs);
+ addTsanRTLinux(getToolChain(), Args, CmdArgs);
if (!Args.hasArg(options::OPT_nostdlib)) {
if (!Args.hasArg(options::OPT_nodefaultlibs)) {