clang/test/CodeGen/hwasan-stack-safety-analysis.c

   1 // REQUIRES: aarch64-registered-target
   2
   3 // RUN: %clang -fsanitize=hwaddress -target aarch64-linux-gnu -S -emit-llvm -mllvm -hwasan-use-stack-safety=true -mllvm -hwasan-generate-tags-with-calls -O2 %s -o - | FileCheck %s --check-prefix=SAFETY
   4 // RUN: %clang -fsanitize=hwaddress -target aarch64-linux-gnu -S -emit-llvm -mllvm -hwasan-use-stack-safety=false -mllvm -hwasan-generate-tags-with-calls -O2 %s -o - | FileCheck %s --check-prefix=NOSAFETY
   5
   6 // Default when optimizing, but not with O0.
   7 // RUN: %clang -fsanitize=hwaddress -target aarch64-linux-gnu -S -emit-llvm -mllvm -hwasan-generate-tags-with-calls -O2 %s -o - | FileCheck %s --check-prefix=SAFETY
   8 // RUN: %clang -fsanitize=hwaddress -target aarch64-linux-gnu -S -emit-llvm -mllvm -hwasan-generate-tags-with-calls -O0 %s -o - | FileCheck %s --check-prefix=NOSAFETY
   9
  10 int main(int argc, char **argv) {
  11   char buf[10];
  12   volatile char *x = buf;
  13   *x = 0;
  14   return buf[0];
  15   // NOSAFETY: call i8 @__hwasan_generate_tag
  16   // SAFETY-NOT: call i8 @__hwasan_generate_tag
  17 }