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0a14674f27
With C++17 the exception specification has been made part of the function type, and therefore part of mangled type names. However, it's valid to convert function pointers with an exception specification to function pointers with the same argument and return types but without an exception specification, which means that e.g. a function of type "void () noexcept" can be called through a pointer of type "void ()". We must therefore consider the two types to be compatible for CFI purposes. We can do this by stripping the exception specification before mangling the type name, which is what this patch does. Differential Revision: https://reviews.llvm.org/D115015
12 lines
412 B
C++
12 lines
412 B
C++
// RUN: %clang_cc1 -triple x86_64-unknown-linux -fsanitize=cfi-icall -emit-llvm -std=c++17 -o - %s | FileCheck %s
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// Tests that exception specifiers are stripped when forming the
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// mangled CFI type name.
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void f() noexcept {}
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// CHECK: define{{.*}} void @_Z1fv({{.*}} !type [[TS1:![0-9]+]] !type [[TS2:![0-9]+]]
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// CHECK: [[TS1]] = !{i64 0, !"_ZTSFvvE"}
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// CHECK: [[TS2]] = !{i64 0, !"_ZTSFvvE.generalized"}
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