Myriad: nominally "support" ASAN.

Doesn't work, but needs to be enabled in order to get there.

llvm-svn: 281071

Author: snuglas

clang/lib/Driver/ToolChains.cpp

@@ -5042,6 +5042,10 @@ Tool *MyriadToolChain::buildLinker() const {
   return new tools::Myriad::Linker(*this);
 }
 
+SanitizerMask MyriadToolChain::getSupportedSanitizers() const {
+  return SanitizerKind::Address;
+}
+
 WebAssembly::WebAssembly(const Driver &D, const llvm::Triple &Triple,
                          const llvm::opt::ArgList &Args)
   : ToolChain(D, Triple, Args) {

clang/lib/Driver/ToolChains.h

@@ -1147,6 +1147,7 @@ class LLVM_LIBRARY_VISIBILITY MyriadToolChain : public Generic_ELF {
       llvm::opt::ArgStringList &CC1Args) const override;
   Tool *SelectTool(const JobAction &JA) const override;
   unsigned GetDefaultDwarfVersion() const override { return 2; }
+  SanitizerMask getSupportedSanitizers() const override;
 
 protected:
   Tool *buildLinker() const override;

clang/lib/Driver/Tools.cpp

@@ -3081,11 +3081,15 @@ static void linkSanitizerRuntimeDeps(const ToolChain &TC,
   // Force linking against the system libraries sanitizers depends on
   // (see PR15823 why this is necessary).
   CmdArgs.push_back("--no-as-needed");
-  CmdArgs.push_back("-lpthread");
-  CmdArgs.push_back("-lrt");
+  // There's no libpthread or librt on RTEMS.
+  if (TC.getTriple().getOS() != llvm::Triple::RTEMS) {
+    CmdArgs.push_back("-lpthread");
+    CmdArgs.push_back("-lrt");
+  }
   CmdArgs.push_back("-lm");
-  // There's no libdl on FreeBSD.
-  if (TC.getTriple().getOS() != llvm::Triple::FreeBSD)
+  // There's no libdl on FreeBSD or RTEMS.
+  if (TC.getTriple().getOS() != llvm::Triple::FreeBSD &&
+      TC.getTriple().getOS() != llvm::Triple::RTEMS)
     CmdArgs.push_back("-ldl");
 }
 
@@ -11055,9 +11059,12 @@ void tools::Myriad::Linker::ConstructJob(Compilation &C, const JobAction &JA,
 
   TC.AddFilePathLibArgs(Args, CmdArgs);
 
+  bool NeedsSanitizerDeps = addSanitizerRuntimes(TC, Args, CmdArgs);
   AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs);
 
   if (UseDefaultLibs) {
+    if (NeedsSanitizerDeps)
+      linkSanitizerRuntimeDeps(TC, CmdArgs);
     if (C.getDriver().CCCIsCXX())
       CmdArgs.push_back("-lstdc++");
     if (T.getOS() == llvm::Triple::RTEMS) {

clang/test/Driver/sanitizer-ld.c

@@ -151,6 +151,15 @@
 // CHECK-ASAN-ANDROID-SHARED: libclang_rt.asan-arm-android.so"
 // CHECK-ASAN-ANDROID-SHARED-NOT: "-lpthread"
 
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target sparcel-myriad-rtems-elf -fsanitize=address \
+// RUN:     --sysroot=%S/Inputs/basic_myriad_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-ASAN-MYRIAD %s
+//
+// CHECK-ASAN-MYRIAD: "{{(.*[^.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
+// CHECK-ASAN-MYRIAD-NOT: "-lc"
+// CHECK-ASAN-MYRIAD: libclang_rt.asan-sparcel.a"
+
 // RUN: %clangxx -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     -target x86_64-unknown-linux -stdlib=platform -lstdc++ \
 // RUN:     -fsanitize=thread \