6bb4ce0f6f
clang currently issues a warning when memset is used on a struct that
contains an address-discriminated pointer field, even though this is
entirely valid behavior.
For example:
```
struct S {
int * __ptrauth(1, 1, 100) p;
} s;
memset(&s, 0, sizeof(struct S));
```
Only allow the warning to be emitted in C++ mode to silence the warning.
rdar://142495870
61 lines
2.6 KiB
C
61 lines
2.6 KiB
C
// RUN: %clang_cc1 -triple arm64-apple-ios -fptrauth-calls -fptrauth-intrinsics -fsyntax-only -verify=c,expected %s
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// RUN: %clang_cc1 -triple aarch64-linux-gnu -fptrauth-calls -fptrauth-intrinsics -fsyntax-only -verify=c,expected %s
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// RUN: %clang_cc1 -triple arm64-apple-ios -fptrauth-calls -fptrauth-intrinsics -fsyntax-only -x c++ -verify=cxx,expected %s
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// RUN: %clang_cc1 -triple aarch64-linux-gnu -fptrauth-calls -fptrauth-intrinsics -fsyntax-only -x c++ -verify=cxx,expected %s
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#if defined __cplusplus
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extern "C" {
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#endif
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void *memset(void *, int, __SIZE_TYPE__);
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void bzero(void *, __SIZE_TYPE__);
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void *memcpy(void *, const void *, __SIZE_TYPE__);
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void *memmove(void *, const void *, __SIZE_TYPE__);
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#if defined __cplusplus
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}
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#endif
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#define AQ __ptrauth(1,1,50)
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#define IQ __ptrauth(1,0,50)
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struct PtrAuthTrivial {
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int f0;
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int * IQ f1;
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};
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struct PtrAuthNonTrivial0 {
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int f0;
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int * AQ f1; // c-note 2 {{non-trivial to copy}}
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int f2;
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};
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struct PtrAuthNonTrivial1 {
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int * AQ f0; // c-note 2 {{non-trivial to copy}}
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int f1;
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struct PtrAuthNonTrivial0 f2;
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};
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void testPtrAuthTrivial(struct PtrAuthTrivial *d, struct PtrAuthTrivial *s) {
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memset(d, 0, sizeof(struct PtrAuthTrivial));
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memset(d, 1, sizeof(struct PtrAuthTrivial));
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bzero(d, sizeof(struct PtrAuthTrivial));
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memcpy(d, s, sizeof(struct PtrAuthTrivial));
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memmove(d, s, sizeof(struct PtrAuthTrivial));
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}
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void testPtrAuthNonTrivial1(struct PtrAuthNonTrivial1 *d,
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struct PtrAuthNonTrivial1 *s) {
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memset(d, 0, sizeof(struct PtrAuthNonTrivial1)); // cxx-warning {{is a pointer to non-trivially copyable type 'struct PtrAuthNonTrivial1'}} // cxx-note {{explicitly cast the pointer to silence}}
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memset(d, 1, sizeof(struct PtrAuthNonTrivial1)); // cxx-warning {{is a pointer to non-trivially copyable type 'struct PtrAuthNonTrivial1'}} // cxx-note {{explicitly cast the pointer to silence}}
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bzero(d, sizeof(struct PtrAuthNonTrivial1)); // cxx-warning {{is a pointer to non-trivially copyable type 'struct PtrAuthNonTrivial1'}} // cxx-note {{explicitly cast the pointer to silence}}
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memcpy(d, s, sizeof(struct PtrAuthNonTrivial1));
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// c-warning@-1 {{that is not trivial to primitive-copy}}
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// cxx-warning@-2 {{is a pointer to non-trivially copyable type 'struct PtrAuthNonTrivial1'}}
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// expected-note@-3 {{explicitly cast the pointer to silence}}
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memmove(d, s, sizeof(struct PtrAuthNonTrivial1));
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// c-warning@-1 {{that is not trivial to primitive-copy}}
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// cxx-warning@-2 {{is a pointer to non-trivially copyable type 'struct PtrAuthNonTrivial1'}}
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// expected-note@-3 {{explicitly cast the pointer to silence}}
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}
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