Add Undefined Behavior sanitizer to Swift Driver (#18553)

This change allows the swift driver to link the ubsan runtime if
`-sanitize=undefined` is specified.
This is useful for sanitizing linked Objective-C code.

include/swift/Basic/Sanitizers.h

@@ -19,7 +19,8 @@ namespace swift {
 enum class SanitizerKind : unsigned {
   Address = 1 << 1,
   Thread = 1 << 2,
-  Fuzzer = 1 << 3
+  Fuzzer = 1 << 3,
+  Undefined = 1 << 4
 };
 
 } // end namespace swift

lib/Driver/DarwinToolChains.cpp

@@ -360,6 +360,9 @@ toolchains::Darwin::constructInvocation(const LinkJobAction &job,
   if (context.OI.SelectedSanitizers & SanitizerKind::Thread)
     addLinkSanitizerLibArgsForDarwin(context.Args, Arguments, "tsan", *this);
 
+  if (context.OI.SelectedSanitizers & SanitizerKind::Undefined)
+    addLinkSanitizerLibArgsForDarwin(context.Args, Arguments, "ubsan", *this);
+
   // Only link in libFuzzer for executables.
   if (job.getKind() == LinkKind::Executable &&
       (context.OI.SelectedSanitizers & SanitizerKind::Fuzzer))

lib/Driver/UnixToolChains.cpp

@@ -301,9 +301,13 @@ toolchains::GenericUnix::constructInvocation(const LinkJobAction &job,
       if (context.OI.SelectedSanitizers & SanitizerKind::Thread)
         addLinkSanitizerLibArgsForLinux(context.Args, Arguments, "tsan", *this);
 
+      if (context.OI.SelectedSanitizers & SanitizerKind::Undefined)
+        addLinkSanitizerLibArgsForLinux(context.Args, Arguments, "ubsan", *this);
+
       if (context.OI.SelectedSanitizers & SanitizerKind::Fuzzer)
         addLinkRuntimeLib(context.Args, Arguments,
                           sanitizerRuntimeLibName("fuzzer"));
+
     }
   }
 

lib/Driver/WindowsToolChains.cpp

@@ -147,6 +147,10 @@ toolchains::Windows::constructInvocation(const LinkJobAction &job,
     if (context.OI.SelectedSanitizers & SanitizerKind::Address)
       addLinkRuntimeLib(context.Args, Arguments,
                         sanitizerRuntimeLibName("asan"));
+
+    if (context.OI.SelectedSanitizers & SanitizerKind::Undefined)
+      addLinkRuntimeLib(context.Args, Arguments,
+                        sanitizerRuntimeLibName("ubsan"));
   }
 
   if (context.Args.hasArg(options::OPT_profile_generate)) {

lib/Option/SanitizerOptions.cpp

@@ -37,6 +37,8 @@ static StringRef toStringRef(const SanitizerKind kind) {
     return "thread";
   case SanitizerKind::Fuzzer:
     return "fuzzer";
+  case SanitizerKind::Undefined:
+    return "undefined";
   }
   llvm_unreachable("Unsupported sanitizer");
 }
@@ -49,6 +51,8 @@ static const char* toFileName(const SanitizerKind kind) {
     return "tsan";
   case SanitizerKind::Fuzzer:
     return "fuzzer";
+  case SanitizerKind::Undefined:
+    return "ubsan";
   }
   llvm_unreachable("Unsupported sanitizer");
 }
@@ -134,6 +138,7 @@ OptionSet<SanitizerKind> swift::parseSanitizerArgValues(
         .Case("address", SanitizerKind::Address)
         .Case("thread", SanitizerKind::Thread)
         .Case("fuzzer", SanitizerKind::Fuzzer)
+        .Case("undefined", SanitizerKind::Undefined)
         .Default(None);
     bool isShared = kind && *kind != SanitizerKind::Fuzzer;
     if (!kind) {

test/Driver/sanitizers.swift

@@ -1,3 +1,6 @@
+/*
+ * Address Sanitizer Tests  (asan)
+ */
 // RUN: %swiftc_driver -resource-dir %S/Inputs/fake-resource-dir/lib/swift/ -driver-print-jobs -sanitize=address -target x86_64-apple-macosx10.9 %s | %FileCheck -check-prefix=ASAN -check-prefix=ASAN_OSX %s
 // RUN: not %swiftc_driver -driver-print-jobs -sanitize=fuzzer -target x86_64-apple-macosx10.9 -resource-dir %S/Inputs/nonexistent-resource-dir %s 2>&1 | %FileCheck -check-prefix=FUZZER_NONEXISTENT %s
 // RUN: %swiftc_driver -resource-dir %S/Inputs/fake-resource-dir/lib/swift/ -driver-print-jobs -sanitize=address -target x86_64-apple-ios7.1 %s | %FileCheck -check-prefix=ASAN -check-prefix=ASAN_IOSSIM %s
@@ -9,6 +12,9 @@
 // RUN: %swiftc_driver -resource-dir %S/Inputs/fake-resource-dir/lib/swift/ -driver-print-jobs -sanitize=address -target x86_64-unknown-linux-gnu %s 2>&1 | %FileCheck -check-prefix=ASAN_LINUX %s
 // RUN: %swiftc_driver -resource-dir %S/Inputs/fake-resource-dir/lib/swift/ -driver-print-jobs -sanitize=address -target x86_64-unknown-windows-msvc %s 2>&1 | %FileCheck -check-prefix=ASAN_WINDOWS %s
 
+/*
+ * Thread Sanitizer Tests  (tsan)
+ */
 // RUN: %swiftc_driver -resource-dir %S/Inputs/fake-resource-dir/lib/swift/ -driver-print-jobs -sanitize=thread -target x86_64-apple-macosx10.9 %s | %FileCheck -check-prefix=TSAN -check-prefix=TSAN_OSX %s
 // RUN: not %swiftc_driver -resource-dir %S/Inputs/fake-resource-dir/lib/swift/ -driver-print-jobs -sanitize=thread -target x86-apple-macosx10.9 %s 2>&1 | %FileCheck -check-prefix=TSAN_OSX_32 %s
 // RUN: not %swiftc_driver -resource-dir %S/Inputs/fake-resource-dir/lib/swift/ -driver-print-jobs -sanitize=thread -target x86_64-apple-ios7.1 %s 2>&1 | %FileCheck -check-prefix=TSAN_IOSSIM %s
@@ -20,6 +26,23 @@
 // RUN: not %swiftc_driver -resource-dir %S/Inputs/fake-resource-dir/lib/swift/ -driver-print-jobs -sanitize=thread -target x86_64-unknown-windows-msvc %s 2>&1 | %FileCheck -check-prefix=TSAN_WINDOWS %s
 // RUN: %swiftc_driver -resource-dir %S/Inputs/fake-resource-dir/lib/swift/ -driver-print-jobs -sanitize=thread -target x86_64-unknown-linux-gnu %s 2>&1 | %FileCheck -check-prefix=TSAN_LINUX %s
 
+/*
+ * Undefined Behavior Sanitizer Tests  (ubsan)
+ */
+// RUN: %swiftc_driver -resource-dir %S/Inputs/fake-resource-dir/lib/swift/ -driver-print-jobs -sanitize=undefined -target x86_64-apple-macosx10.9 %s | %FileCheck -check-prefix=UBSAN -check-prefix=UBSAN_OSX %s
+// RUN: %swiftc_driver -resource-dir %S/Inputs/fake-resource-dir/lib/swift/ -driver-print-jobs -sanitize=undefined -target x86_64-apple-ios7.1 %s | %FileCheck -check-prefix=UBSAN -check-prefix=UBSAN_IOSSIM %s
+// RUN: %swiftc_driver -resource-dir %S/Inputs/fake-resource-dir/lib/swift/ -driver-print-jobs -sanitize=undefined -target arm64-apple-ios7.1 %s  | %FileCheck -check-prefix=UBSAN -check-prefix=UBSAN_IOS %s
+// RUN: %swiftc_driver -resource-dir %S/Inputs/fake-resource-dir/lib/swift/ -driver-print-jobs -sanitize=undefined -target x86_64-apple-tvos9.0 %s | %FileCheck -check-prefix=UBSAN -check-prefix=UBSAN_tvOS_SIM %s
+// RUN: %swiftc_driver -resource-dir %S/Inputs/fake-resource-dir/lib/swift/ -driver-print-jobs -sanitize=undefined -target arm64-apple-tvos9.0 %s  | %FileCheck -check-prefix=UBSAN -check-prefix=UBSAN_tvOS %s
+// RUN: %swiftc_driver -resource-dir %S/Inputs/fake-resource-dir/lib/swift/ -driver-print-jobs -sanitize=undefined -target i386-apple-watchos2.0 %s   | %FileCheck -check-prefix=UBSAN -check-prefix=UBSAN_watchOS_SIM %s
+// RUN: %swiftc_driver -resource-dir %S/Inputs/fake-resource-dir/lib/swift/ -driver-print-jobs -sanitize=undefined -target armv7k-apple-watchos2.0 %s | %FileCheck -check-prefix=UBSAN -check-prefix=UBSAN_watchOS %s
+// RUN: %swiftc_driver -resource-dir %S/Inputs/fake-resource-dir/lib/swift/ -driver-print-jobs -sanitize=undefined -target x86_64-unknown-linux-gnu %s 2>&1 | %FileCheck -check-prefix=UBSAN_LINUX %s
+// RUN: %swiftc_driver -resource-dir %S/Inputs/fake-resource-dir/lib/swift/ -driver-print-jobs -sanitize=undefined -target x86_64-unknown-windows-msvc %s 2>&1 | %FileCheck -check-prefix=UBSAN_WINDOWS %s
+
+
+/*
+ * Bad Argument Tests
+ */
 // RUN: not %swiftc_driver -resource-dir %S/Inputs/fake-resource-dir/lib/swift/ -driver-print-jobs -sanitize=address,unknown %s 2>&1 | %FileCheck -check-prefix=BADARG %s
 // RUN: not %swiftc_driver -resource-dir %S/Inputs/fake-resource-dir/lib/swift/ -driver-print-jobs -sanitize=address -sanitize=unknown %s 2>&1 | %FileCheck -check-prefix=BADARG %s
 // RUN: not %swiftc_driver -resource-dir %S/Inputs/fake-resource-dir/lib/swift/ -driver-print-jobs -sanitize=address,thread %s 2>&1 | %FileCheck -check-prefix=INCOMPATIBLESANITIZERS %s
@@ -64,5 +87,20 @@
 
 // TSAN: -rpath @executable_path
 
+// UBSAN: swift
+// UBSAN: -sanitize=undefined
+
+// UBSAN_OSX: lib/swift/clang/lib/darwin/libclang_rt.ubsan_osx_dynamic.dylib
+// UBSAN_IOSSIM: lib/swift/clang/lib/darwin/libclang_rt.ubsan_iossim_dynamic.dylib
+// UBSAN_IOS: lib/swift/clang/lib/darwin/libclang_rt.ubsan_ios_dynamic.dylib
+// UBSAN_tvOS_SIM: lib/swift/clang/lib/darwin/libclang_rt.ubsan_tvossim_dynamic.dylib
+// UBSAN_tvOS: lib/swift/clang/lib/darwin/libclang_rt.ubsan_tvos_dynamic.dylib
+// UBSAN_watchOS_SIM: lib/swift/clang/lib/darwin/libclang_rt.ubsan_watchossim_dynamic.dylib
+// UBSAN_watchOS: lib/swift/clang/lib/darwin/libclang_rt.ubsan_watchos_dynamic.dylib
+// UBSAN_LINUX: lib/swift/clang/lib/linux/libclang_rt.ubsan-x86_64.a
+// UBSAN_WINDOWS: lib/swift/clang/lib/windows/clang_rt.ubsan-x86_64.lib
+
+// UBSAN: -rpath @executable_path
+
 // BADARG: unsupported argument 'unknown' to option '-sanitize='
 // INCOMPATIBLESANITIZERS: argument '-sanitize=address' is not allowed with '-sanitize=thread'