[clang] Add -fsanitize=memtag-globals (no-op).

Adds the -fsanitize plumbing for memtag-globals. Makes -fsanitize=memtag
imply -fsanitize=memtag-globals.

This has no effect on codegen for now.

Reviewed By: eugenis, aaron.ballman

Differential Revision: https://reviews.llvm.org/D127163

diff --git a/clang/include/clang/Basic/Features.def b/clang/include/clang/Basic/Features.def
index f241d68..a7f0ae0 100644 (file)
--- a/clang/include/clang/Basic/Features.def
+++ b/clang/include/clang/Basic/Features.def
@@ -49,6 +49,8 @@ FEATURE(memtag_stack,
         LangOpts.Sanitize.has(SanitizerKind::MemtagStack))
 FEATURE(memtag_heap,
         LangOpts.Sanitize.has(SanitizerKind::MemtagHeap))
+FEATURE(memtag_globals,
+        LangOpts.Sanitize.has(SanitizerKind::MemtagGlobals))
 FEATURE(xray_instrument, LangOpts.XRayInstrument)
 FEATURE(undefined_behavior_sanitizer,
         LangOpts.Sanitize.hasOneOf(SanitizerKind::Undefined))

diff --git a/clang/include/clang/Basic/Sanitizers.def b/clang/include/clang/Basic/Sanitizers.def
index 7149344..8e7b6cd 100644 (file)
--- a/clang/include/clang/Basic/Sanitizers.def
+++ b/clang/include/clang/Basic/Sanitizers.def
@@ -58,7 +58,8 @@ SANITIZER("kernel-hwaddress", KernelHWAddress)
 // A variant of AddressSanitizer using AArch64 MTE extension.
 SANITIZER("memtag-stack", MemtagStack)
 SANITIZER("memtag-heap", MemtagHeap)
-SANITIZER_GROUP("memtag", MemTag, MemtagStack | MemtagHeap)
+SANITIZER("memtag-globals", MemtagGlobals)
+SANITIZER_GROUP("memtag", MemTag, MemtagStack | MemtagHeap | MemtagGlobals)
 
 // MemorySanitizer
 SANITIZER("memory", Memory)

diff --git a/clang/include/clang/Driver/SanitizerArgs.h b/clang/include/clang/Driver/SanitizerArgs.h
index a681ad3..1b29b11 100644 (file)
--- a/clang/include/clang/Driver/SanitizerArgs.h
+++ b/clang/include/clang/Driver/SanitizerArgs.h
@@ -99,13 +99,18 @@ public:
   bool needsStatsRt() const { return Stats; }
   bool needsScudoRt() const { return Sanitizers.has(SanitizerKind::Scudo); }
 
-  bool hasMemTag() const { return hasMemtagHeap() || hasMemtagStack(); }
+  bool hasMemTag() const {
+    return hasMemtagHeap() || hasMemtagStack() || hasMemtagGlobals();
+  }
   bool hasMemtagHeap() const {
     return Sanitizers.has(SanitizerKind::MemtagHeap);
   }
   bool hasMemtagStack() const {
     return Sanitizers.has(SanitizerKind::MemtagStack);
   }
+  bool hasMemtagGlobals() const {
+    return Sanitizers.has(SanitizerKind::MemtagGlobals);
+  }
   const std::string &getMemtagMode() const {
     assert(!MemtagMode.empty());
     return MemtagMode;

diff --git a/clang/lib/Driver/SanitizerArgs.cpp b/clang/lib/Driver/SanitizerArgs.cpp
index 9ebcc9e..edb1bfb 100644 (file)
--- a/clang/lib/Driver/SanitizerArgs.cpp
+++ b/clang/lib/Driver/SanitizerArgs.cpp
@@ -45,7 +45,8 @@ static const SanitizerMask SupportsCoverage =
     SanitizerKind::Address | SanitizerKind::HWAddress |
     SanitizerKind::KernelAddress | SanitizerKind::KernelHWAddress |
     SanitizerKind::MemtagStack | SanitizerKind::MemtagHeap |
-    SanitizerKind::Memory | SanitizerKind::KernelMemory | SanitizerKind::Leak |
+    SanitizerKind::MemtagGlobals | SanitizerKind::Memory |
+    SanitizerKind::KernelMemory | SanitizerKind::Leak |
     SanitizerKind::Undefined | SanitizerKind::Integer | SanitizerKind::Bounds |
     SanitizerKind::ImplicitConversion | SanitizerKind::Nullability |
     SanitizerKind::DataFlow | SanitizerKind::Fuzzer |
@@ -73,7 +74,8 @@ static const SanitizerMask CFIClasses =
     SanitizerKind::CFIUnrelatedCast;
 static const SanitizerMask CompatibleWithMinimalRuntime =
     TrappingSupported | SanitizerKind::Scudo | SanitizerKind::ShadowCallStack |
-    SanitizerKind::MemtagStack | SanitizerKind::MemtagHeap;
+    SanitizerKind::MemtagStack | SanitizerKind::MemtagHeap |
+    SanitizerKind::MemtagGlobals;
 
 enum CoverageFeature {
   CoverageFunc = 1 << 0,

diff --git a/clang/test/Driver/fsanitize.c b/clang/test/Driver/fsanitize.c
index 75587f8..1d97e99 100644 (file)
--- a/clang/test/Driver/fsanitize.c
+++ b/clang/test/Driver/fsanitize.c
@@ -193,9 +193,9 @@
 // RUN: %clang -target x86_64-linux-android -fsanitize=memtag -fno-rtti %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANMT-BAD-ARCH
 // CHECK-SANMT-BAD-ARCH: unsupported option '-fsanitize=memtag' for target
 
-// RUN: %clang -target aarch64-linux -fsanitize=memtag -march=armv8-a+memtag %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANMT-MT
+// RUN: %clang -target aarch64-linux-android31 -fsanitize=memtag -march=armv8-a+memtag %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANMT-MT
 // CHECK-SANMT-MT: "-target-feature" "+mte"
-// CHECK-SANMT-MT-SAME: "-fsanitize=memtag-stack,memtag-heap"
+// CHECK-SANMT-MT-SAME: "-fsanitize=memtag-stack,memtag-heap,memtag-globals"
 
 // RUN: %clang -target aarch64-linux -fsanitize=memtag %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-SANMT-NOMT-0
 // CHECK-SANMT-NOMT-0: '-fsanitize=memtag-stack' requires hardware support (+memtag)
@@ -827,7 +827,7 @@
 // CHECK-INTSAN-MINIMAL: "-fsanitize-minimal-runtime"
 
 // RUN: %clang -target aarch64-linux-android -march=armv8-a+memtag -fsanitize=memtag -fsanitize-minimal-runtime %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-MEMTAG-MINIMAL
-// CHECK-MEMTAG-MINIMAL: "-fsanitize=memtag-stack,memtag-heap"
+// CHECK-MEMTAG-MINIMAL: "-fsanitize=memtag-stack,memtag-heap,memtag-globals"
 // CHECK-MEMTAG-MINIMAL: "-fsanitize-minimal-runtime"
 
 // RUN: %clang -target x86_64-linux-gnu -fsanitize=undefined -fsanitize=function -fsanitize-minimal-runtime %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-UBSAN-FUNCTION-MINIMAL