clang/test/CodeGen/kcfi-normalize.c

   1 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -fsanitize=kcfi -fsanitize-cfi-icall-experimental-normalize-integers -o - %s | FileCheck %s
   2 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -fsanitize=kcfi -fsanitize-cfi-icall-experimental-normalize-integers -x c++ -o - %s | FileCheck %s
   3 #if !__has_feature(kcfi)
   4 #error Missing kcfi?
   5 #endif
   6
   7 // Test that normalized type metadata for functions are emitted for cross-language KCFI support with
   8 // other languages that can't represent and encode C/C++ integer types.
   9
  10 void foo(void (*fn)(int), int arg) {
  11     // CHECK-LABEL: define{{.*}}foo
  12     // CHECK-SAME: {{.*}}!kcfi_type ![[TYPE1:[0-9]+]]
  13     // CHECK: call void %0(i32 noundef %1){{.*}}[ "kcfi"(i32 1162514891) ]
  14     fn(arg);
  15 }
  16
  17 void bar(void (*fn)(int, int), int arg1, int arg2) {
  18     // CHECK-LABEL: define{{.*}}bar
  19     // CHECK-SAME: {{.*}}!kcfi_type ![[TYPE2:[0-9]+]]
  20     // CHECK: call void %0(i32 noundef %1, i32 noundef %2){{.*}}[ "kcfi"(i32 448046469) ]
  21     fn(arg1, arg2);
  22 }
  23
  24 void baz(void (*fn)(int, int, int), int arg1, int arg2, int arg3) {
  25     // CHECK-LABEL: define{{.*}}baz
  26     // CHECK-SAME: {{.*}}!kcfi_type ![[TYPE3:[0-9]+]]
  27     // CHECK: call void %0(i32 noundef %1, i32 noundef %2, i32 noundef %3){{.*}}[ "kcfi"(i32 -2049681433) ]
  28     fn(arg1, arg2, arg3);
  29 }
  30
  31 // CHECK: ![[#]] = !{i32 4, !"cfi-normalize-integers", i32 1}
  32 // CHECK: ![[TYPE1]] = !{i32 -1143117868}
  33 // CHECK: ![[TYPE2]] = !{i32 -460921415}
  34 // CHECK: ![[TYPE3]] = !{i32 -333839615}