Index: lib/Transforms/Instrumentation/AddressSanitizer.cpp =================================================================== --- lib/Transforms/Instrumentation/AddressSanitizer.cpp +++ lib/Transforms/Instrumentation/AddressSanitizer.cpp @@ -1142,6 +1142,8 @@ // Globals from llvm.metadata aren't emitted, do not instrument them. if (Section == "llvm.metadata") return false; + // Do not instrument globals from special llvm sections. + if (Section.find("__llvm") != StringRef::npos) return false; // Callbacks put into the CRT initializer/terminator sections // should not be instrumented. Index: test/Instrumentation/AddressSanitizer/do-not-instrument-llvm-metadata-darwin.ll =================================================================== --- test/Instrumentation/AddressSanitizer/do-not-instrument-llvm-metadata-darwin.ll +++ test/Instrumentation/AddressSanitizer/do-not-instrument-llvm-metadata-darwin.ll @@ -1,12 +1,15 @@ -; This test checks that we are not instrumenting globals in llvm.metadata. +; This test checks that we are not instrumenting globals in llvm.metadata +; and other llvm internal globals. ; RUN: opt < %s -asan -asan-module -S | FileCheck %s target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" target triple = "x86_64-apple-macosx10.10.0" @.str_noinst = private unnamed_addr constant [4 x i8] c"aaa\00", section "llvm.metadata" +@.str_noinst_prof = private unnamed_addr constant [4 x i8] c"aaa\00", section "__DATA,__llvm_covmap" @.str_inst = private unnamed_addr constant [4 x i8] c"aaa\00" ; CHECK-NOT: {{asan_gen.*str_noinst}} +; CHECK-NOT: {{asan_gen.*str_noinst_prof}} ; CHECK: {{asan_gen.*str_inst}} ; CHECK: @asan.module_ctor Index: test/Instrumentation/AddressSanitizer/do-not-instrument-llvm-metadata.ll =================================================================== --- test/Instrumentation/AddressSanitizer/do-not-instrument-llvm-metadata.ll +++ test/Instrumentation/AddressSanitizer/do-not-instrument-llvm-metadata.ll @@ -1,12 +1,15 @@ -; This test checks that we are not instrumenting globals in llvm.metadata. +; This test checks that we are not instrumenting globals in llvm.metadata +; and other llvm internal globals. ; RUN: opt < %s -asan -asan-module -S | FileCheck %s target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" target triple = "x86_64-unknown-linux-gnu" @.str_noinst = private unnamed_addr constant [4 x i8] c"aaa\00", section "llvm.metadata" +@.str_noinst_prof = private unnamed_addr constant [4 x i8] c"aaa\00", section "__llvm_prf_data" @.str_inst = private unnamed_addr constant [4 x i8] c"aaa\00" ; CHECK-NOT: {{asan_gen.*str_noinst}} +; CHECK-NOT: {{asan_gen.*str_noinst_prof}} ; CHECK: {{asan_gen.*str_inst}} ; CHECK: @asan.module_ctor