[PATCH] D129492: Add missing sanitizer metadata plumbing from CFE.

[Mitch Phillips via Phabricator via cfe-commits]

hctim created this revision.
hctim added a reviewer: eugenis.
Herald added a project: All.
hctim requested review of this revision.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.

clang misses attaching sanitizer metadata for external globals.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D129492

Files:
  clang/lib/CodeGen/CodeGenModule.cpp
  clang/test/CodeGen/memtag-globals.cpp


Index: clang/test/CodeGen/memtag-globals.cpp
===================================================================
--- clang/test/CodeGen/memtag-globals.cpp
+++ clang/test/CodeGen/memtag-globals.cpp
@@ -11,10 +11,12 @@
 int __attribute__((no_sanitize("memtag"))) attributed_global;
 int __attribute__((disable_sanitizer_instrumentation)) disable_instrumentation_global;
 int ignorelisted_global;
+extern int external_global;
 
 void func() {
   static int static_var = 0;
   const char *literal = "Hello, world!";
+  external_global = 1;
 }
 
 // CHECK: @{{.*}}extra_global{{.*}} ={{.*}} sanitize_memtag
@@ -29,6 +31,7 @@
 
 // CHECK: @{{.*}}static_var{{.*}} ={{.*}} sanitize_memtag
 // CHECK: @{{.*}} = {{.*}} c"Hello, world!\00"{{.*}} sanitize_memtag
+// CHECK: @{{.*}}external_global{{.*}} ={{.*}} sanitize_memtag
 
 // IGNORELIST: @{{.*}}extra_global{{.*}} ={{.*}} sanitize_memtag
 
@@ -44,3 +47,5 @@
 // IGNORELIST-NOT: sanitize_memtag
 // IGNORELIST:     @{{.*}} = {{.*}} c"Hello, world!\00"{{.*}}
 // IGNORELIST-NOT: sanitize_memtag
+// IGNORELIST:     @{{.*}}external_global{{.*}} =
+// IGNORELIST-NOT: sanitize_memtag
Index: clang/lib/CodeGen/CodeGenModule.cpp
===================================================================
--- clang/lib/CodeGen/CodeGenModule.cpp
+++ clang/lib/CodeGen/CodeGenModule.cpp
@@ -4286,6 +4286,9 @@
       getCUDARuntime().handleVarRegistration(D, *GV);
   }
 
+  if (D)
+    SanitizerMD->reportGlobal(GV, *D);
+
   LangAS ExpectedAS =
       D ? D->getType().getAddressSpace()
         : (LangOpts.OpenCL ? LangAS::opencl_global : LangAS::Default);


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