| // RUN: %clang_cc1 -triple x86_64-linux-gnu -fsanitize=address -disable-llvm-passes -emit-llvm -o - %s | FileCheck %s --check-prefix=LINUX |
| // RUN: %clang_cc1 -triple x86_64-windows-msvc -fsanitize=address -disable-llvm-passes -emit-llvm -o - %s | FileCheck %s --check-prefix=WINDOWS |
| // RUN: %clang_cc1 -triple x86_64-windows-msvc -fsanitize=address -fwritable-strings -disable-llvm-passes -emit-llvm -o - %s | FileCheck %s --check-prefix=WINWRITE |
| |
| // On Linux (and basically every non-MS target) string literals are emitted with |
| // private linkage, which means ASan can freely instrument them. On Windows, |
| // they are emitted with comdats. ASan's global instrumentation code for COFF |
| // knows how to make the metadata comdat associative, so the string literal |
| // global is only registered if the instrumented global prevails during linking. |
| |
| const char *foo(void) { return "asdf"; } |
| |
| // LINUX: @.str = private unnamed_addr constant [5 x i8] c"asdf\00", align 1 |
| |
| // WINDOWS: @"??_C@_04JIHMPGLA@asdf?$AA@" = linkonce_odr dso_local unnamed_addr constant [5 x i8] c"asdf\00", comdat, align 1 |
| |
| // WINWRITE: @.str = private unnamed_addr global [5 x i8] c"asdf\00", align 1 |
