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dd403575a2
Summary: As per IRC disscussion, it seems we really want to have more fine-grained `-fsanitize=implicit-integer-truncation`: * A check when both of the types are unsigned. * Another check for the other cases (either one of the types is signed, or both of the types is signed). This is clang part. Compiler-rt part is D50902. Reviewers: rsmith, vsk, Sanitizers Reviewed by: rsmith Differential Revision: https://reviews.llvm.org/D50901 llvm-svn: 344230
41 lines
2.1 KiB
C
41 lines
2.1 KiB
C
// RUN: %clang_cc1 -fsanitize=implicit-signed-integer-truncation -fsanitize-recover=implicit-signed-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
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// CHECK-DAG: @[[LINE_100_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 100, i32 10 }, {{.*}}, {{.*}}, i8 2 }
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// CHECK-DAG: @[[LINE_200_SIGNED_TRUNCATION:.*]] = {{.*}}, i32 200, i32 10 }, {{.*}}, {{.*}}, i8 2 }
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// CHECK-LABEL: @blacklist_0_convert_signed_int_to_signed_char
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__attribute__((no_sanitize("undefined"))) signed char blacklist_0_convert_signed_int_to_signed_char(signed int x) {
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// We are not in "undefined" group, so that doesn't work.
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// CHECK: call void @__ubsan_handle_implicit_conversion(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_100_SIGNED_TRUNCATION]] to i8*)
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#line 100
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return x;
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}
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// CHECK-LABEL: @blacklist_1_convert_signed_int_to_signed_char
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__attribute__((no_sanitize("integer"))) signed char blacklist_1_convert_signed_int_to_signed_char(signed int x) {
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return x;
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}
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// CHECK-LABEL: @blacklist_2_convert_signed_int_to_signed_char
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__attribute__((no_sanitize("implicit-conversion"))) signed char blacklist_2_convert_signed_int_to_signed_char(signed int x) {
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return x;
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}
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// CHECK-LABEL: @blacklist_3_convert_signed_int_to_signed_char
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__attribute__((no_sanitize("implicit-integer-truncation"))) signed char blacklist_3_convert_signed_int_to_signed_char(signed int x) {
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return x;
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}
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// CHECK-LABEL: @blacklist_4_convert_signed_int_to_signed_char
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__attribute__((no_sanitize("implicit-signed-integer-truncation"))) signed char blacklist_4_convert_signed_int_to_signed_char(signed int x) {
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return x;
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}
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// CHECK-LABEL: @blacklist_5_convert_signed_int_to_signed_char
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__attribute__((no_sanitize("implicit-unsigned-integer-truncation"))) signed char blacklist_5_convert_signed_int_to_signed_char(signed int x) {
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// This is an signed truncation, not unsigned-one.
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// CHECK: call void @__ubsan_handle_implicit_conversion(i8* bitcast ({ {{{.*}}}, {{{.*}}}*, {{{.*}}}*, i8 }* @[[LINE_200_SIGNED_TRUNCATION]] to i8*)
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#line 200
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return x;
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}
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