Force link sanitizer rtlib with -fsanitize-link-runtime

Link runtimes

Author: chestnykh

clang/lib/Driver/SanitizerArgs.cpp

@@ -1160,7 +1160,8 @@ SanitizerArgs::SanitizerArgs(const ToolChain &TC,
   LinkRuntimes =
       Args.hasFlag(options::OPT_fsanitize_link_runtime,
                    options::OPT_fno_sanitize_link_runtime, LinkRuntimes) &&
-      !Args.hasArg(options::OPT_r);
+      Args.hasFlag(options::OPT_fsanitize_link_runtime, options::OPT_r,
+                   LinkRuntimes);
 
   // Parse -link-cxx-sanitizer flag.
   LinkCXXRuntimes = D.CCCIsCXX();

clang/test/Driver/sanitizer-ld.c

@@ -1378,6 +1378,14 @@
 //
 // CHECK-RELOCATABLE-LINK-ASAN-UBSAN-RTLIB-NOT: "{{.*}}(asan|ubsan){{.*}}"
 
+// RUN: %clang -fsanitize=address -r -fsanitize-link-runtime -### %s 2>&1 \
+// RUN:     --target=x86_64-unknown-linux -fuse-ld=ld \
+// RUN:     -resource-dir=%S/Inputs/resource_dir \
+// RUN:     --sysroot=%S/Inputs/basic_linux_tree \
+// RUN:   | FileCheck %s --check-prefix=CHECK-RELOCATABLE-LINK-FORCE-LINK-ASAN
+//
+// CHECK-RELOCATABLE-LINK-FORCE-LINK-ASAN: "{{.*}}asan{{.*}}"
+
 // RUN: %clang -fsanitize=thread -r -### %s 2>&1 \
 // RUN:     --target=x86_64-unknown-linux -fuse-ld=ld \
 // RUN:     -resource-dir=%S/Inputs/resource_dir \