c5978f42ec
Sometimes people get minimal crash reports after a UBSAN incident. This change tags each trap with an integer representing the kind of failure encountered, which can aid in tracking down the root cause of the problem.
39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
// RUN: %clang_cc1 -triple x86_64-apple-darwin %s -emit-llvm -o - -fsanitize=unsigned-integer-overflow | FileCheck %s --check-prefix=UNSIGNED
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// RUN: %clang_cc1 -triple x86_64-apple-darwin %s -emit-llvm -o - -ftrapv | FileCheck %s --check-prefix=TRAPV
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// RUN: %clang_cc1 -triple x86_64-apple-darwin %s -emit-llvm -o - -fsanitize=unsigned-integer-overflow -ftrapv | FileCheck %s --check-prefix=BOTH
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// Verify that -ftrapv and -fsanitize=unsigned-integer-overflow
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// work together as expected
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// UNSIGNED: @test_signed
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// TRAPV: @test_signed
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// BOTH: @test_signed
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void test_signed() {
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extern volatile int a, b, c;
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// UNSIGNED: add nsw i32
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// UNSIGNED-NOT: overflow
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// TRAPV: sadd.with.overflow.i32
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// TRAPV-NOT: @__ubsan
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// TRAPV: llvm.ubsantrap
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// BOTH: sadd.with.overflow.i32
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// BOTH-NOT: @__ubsan
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// BOTH: llvm.ubsantrap
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a = b + c;
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}
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// UNSIGNED: @test_unsigned
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// TRAPV: @test_unsigned
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// BOTH: @test_unsigned
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void test_unsigned() {
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extern volatile unsigned x, y, z;
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// UNSIGNED: uadd.with.overflow.i32
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// UNSIGNED-NOT: llvm.trap
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// UNSIGNED: ubsan
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// TRAPV-NOT: overflow
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// TRAPV-NOT: llvm.trap
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// BOTH: uadd.with.overflow.i32
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// BOTH: @__ubsan
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// BOTH-NOT: llvm.ubsantrap
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x = y + z;
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}
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