test/CodeGen/catch-implicit-unsigned-integer-truncations-basics-negatives.c

   1 // RUN: %clang_cc1 -fsanitize=implicit-unsigned-integer-truncation -fsanitize-recover=implicit-unsigned-integer-truncation -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s -implicit-check-not="call void @__ubsan_handle_implicit_conversion" --check-prefixes=CHECK
   2
   3 // CHECK-DAG: @[[LINE_100_UNSIGNED_TRUNCATION:.*]] = {{.*}}, i32 100, i32 10 }, {{.*}}, {{.*}}, i8 1 }
   4 // CHECK-DAG: @[[LINE_200_UNSIGNED_TRUNCATION:.*]] = {{.*}}, i32 200, i32 10 }, {{.*}}, {{.*}}, i8 1 }
   5
   6 // CHECK-LABEL: @blacklist_0_convert_unsigned_int_to_unsigned_char
   7 __attribute__((no_sanitize("undefined"))) unsigned char blacklist_0_convert_unsigned_int_to_unsigned_char(unsigned int x) {
   8   // We are not in "undefined" group, so that doesn't work.
   9   // CHECK: call void @__ubsan_handle_implicit_conversion(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_100_UNSIGNED_TRUNCATION]] to i8*)
  10 #line 100
  11   return x;
  12 }
  13
  14 // CHECK-LABEL: @blacklist_1_convert_unsigned_int_to_unsigned_char
  15 __attribute__((no_sanitize("integer"))) unsigned char blacklist_1_convert_unsigned_int_to_unsigned_char(unsigned int x) {
  16   return x;
  17 }
  18
  19 // CHECK-LABEL: @blacklist_2_convert_unsigned_int_to_unsigned_char
  20 __attribute__((no_sanitize("implicit-conversion"))) unsigned char blacklist_2_convert_unsigned_int_to_unsigned_char(unsigned int x) {
  21   return x;
  22 }
  23
  24 // CHECK-LABEL: @blacklist_3_convert_unsigned_int_to_unsigned_char
  25 __attribute__((no_sanitize("implicit-integer-truncation"))) unsigned char blacklist_3_convert_unsigned_int_to_unsigned_char(unsigned int x) {
  26   return x;
  27 }
  28
  29 // CHECK-LABEL: @blacklist_4_convert_unsigned_int_to_unsigned_char
  30 __attribute__((no_sanitize("implicit-unsigned-integer-truncation"))) unsigned char blacklist_4_convert_unsigned_int_to_unsigned_char(unsigned int x) {
  31   return x;
  32 }
  33
  34 // CHECK-LABEL: @blacklist_5_convert_unsigned_int_to_unsigned_char
  35 __attribute__((no_sanitize("implicit-signed-integer-truncation"))) unsigned char blacklist_5_convert_unsigned_int_to_unsigned_char(unsigned int x) {
  36   // This is an unsigned truncation, not signed-one.
  37   // CHECK: call void @__ubsan_handle_implicit_conversion(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_200_UNSIGNED_TRUNCATION]] to i8*)
  38 #line 200
  39   return x;
  40 }