FreeBSD driver / Xray flags moving pthread to compile flags.

Summary:
- Using -lpthread instead, with -pthread the linkage does not work.
-Warning about the -fxray-instrument usage outside of the working cases.

Patch by: David CARLIER

Reviewers: krytarowski, vitalybuka, dberris, emaste

Reviewed By: krytarowski, emaste

Subscribers: srhines, emaste, cfe-commits

Differential Revision: https://reviews.llvm.org/D43378

llvm-svn: 325746

clang/lib/Driver/ToolChains/FreeBSD.cpp

@@ -136,9 +136,9 @@ static bool addXRayRuntime(const ToolChain &TC, const ArgList &Args,
 static void linkXRayRuntimeDeps(const ToolChain &TC, const ArgList &Args,
                                 ArgStringList &CmdArgs) {
   CmdArgs.push_back("--no-as-needed");
-  CmdArgs.push_back("-pthread");
   CmdArgs.push_back("-lrt");
   CmdArgs.push_back("-lm");
+  CmdArgs.push_back("-lpthread");
 } 
 
 void freebsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,

clang/lib/Driver/XRayArgs.cpp

@@ -34,7 +34,7 @@ XRayArgs::XRayArgs(const ToolChain &TC, const ArgList &Args) {
   const llvm::Triple &Triple = TC.getTriple();
   if (Args.hasFlag(options::OPT_fxray_instrument,
                    options::OPT_fnoxray_instrument, false)) {
-    if (Triple.getOS() == llvm::Triple::Linux)
+    if (Triple.getOS() == llvm::Triple::Linux) {
       switch (Triple.getArch()) {
       case llvm::Triple::x86_64:
       case llvm::Triple::arm:
@@ -49,9 +49,15 @@ XRayArgs::XRayArgs(const ToolChain &TC, const ArgList &Args) {
         D.Diag(diag::err_drv_clang_unsupported)
             << (std::string(XRayInstrumentOption) + " on " + Triple.str());
       }
-    else
+    } else if (Triple.getOS() == llvm::Triple::FreeBSD) {
+        if (Triple.getArch() != llvm::Triple::x86_64) {
+          D.Diag(diag::err_drv_clang_unsupported)
+              << (std::string(XRayInstrumentOption) + " on " + Triple.str());
+        }
+    } else {
       D.Diag(diag::err_drv_clang_unsupported)
-          << (std::string(XRayInstrumentOption) + " on non-Linux target OS");
+          << (std::string(XRayInstrumentOption) + " on non-supported target OS");
+    }
     XRayInstrument = true;
     if (const Arg *A =
             Args.getLastArg(options::OPT_fxray_instruction_threshold_,

clang/test/Driver/XRay/lit.local.cfg

@@ -1,15 +1,16 @@
+import platform
 target_triple_components = config.target_triple.split('-')
 config.available_features.update(target_triple_components)
 
 # Only run the tests in platforms where XRay instrumentation is supported.
 supported_targets = [
-    'x86_64', 'x86_64h', 'arm', 'aarch64', 'arm64', 'powerpc64le', 'mips',
+    'amd64', 'x86_64', 'x86_64h', 'arm', 'aarch64', 'arm64', 'powerpc64le', 'mips',
     'mipsel', 'mips64', 'mips64el'
 ]
 
 # Only on platforms we support.
 supported_oses = [
-    'linux'
+    'Linux', 'FreeBSD'
 ]
 
 triple_set = set(target_triple_components)
@@ -17,7 +18,7 @@ if len(triple_set.intersection(supported_targets)) == 0:
   config.unsupported = True
 
 # Do not run for 'android' despite being linux.
-if len(triple_set.intersection(supported_oses)) == 0 or 'android' in triple_set:
+if platform.system() not in supported_oses or 'android' in triple_set:
   config.unsupported = True
 
 if config.enable_shared:

clang/test/Driver/XRay/xray-instrument-os.c

@@ -1,4 +1,4 @@
 // RUN: not %clang -o /dev/null -v -fxray-instrument -c %s
-// XFAIL: -linux-
+// REQUIRES: linux
 // REQUIRES-ANY: amd64, x86_64, x86_64h, arm, aarch64, arm64
 typedef int a;

clang/test/Driver/XRay/xray-shared-noxray.cpp

@@ -8,7 +8,7 @@
 // SHARED-NOT: {{clang_rt\.xray-}}
 // STATIC: {{clang_rt\.xray-}}
 //
-// REQUIRES: linux, enable_shared
+// REQUIRES: enable_shared
 int foo() { return 42; }
 
 #ifdef MAIN