clang/test/CodeGen/asan-strings.c

   1 // RUN: %clang_cc1 -triple x86_64-linux-gnu -fsanitize=address -disable-llvm-passes -emit-llvm -o - %s | FileCheck %s --check-prefix=LINUX
   2 // RUN: %clang_cc1 -triple x86_64-windows-msvc -fsanitize=address -disable-llvm-passes -emit-llvm -o - %s | FileCheck %s --check-prefix=WINDOWS
   3 // RUN: %clang_cc1 -triple x86_64-windows-msvc -fsanitize=address -fwritable-strings -disable-llvm-passes -emit-llvm -o - %s | FileCheck %s --check-prefix=WINWRITE
   4
   5 // On Linux (and basically every non-MS target) string literals are emitted with
   6 // private linkage, which means ASan can freely instrument them. On Windows,
   7 // they are emitted with comdats. ASan's global instrumentation code for COFF
   8 // knows how to make the metadata comdat associative, so the string literal
   9 // global is only registered if the instrumented global prevails during linking.
  10
  11 const char *foo(void) { return "asdf"; }
  12
  13 // LINUX: @.str = private unnamed_addr constant [5 x i8] c"asdf\00", align 1
  14
  15 // WINDOWS: @"??_C@_04JIHMPGLA@asdf?$AA@" = linkonce_odr dso_local unnamed_addr constant [5 x i8] c"asdf\00", comdat, align 1
  16
  17 // WINWRITE: @.str = private unnamed_addr global [5 x i8] c"asdf\00", align 1