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2be0441e77
Issue a warning when non-trivial C structs are copied or initialized by calls to memset, bzero, memcpy, or memmove. rdar://problem/36124208 Differential Revision: https://reviews.llvm.org/D45310 llvm-svn: 330202
40 lines
1.8 KiB
Objective-C
40 lines
1.8 KiB
Objective-C
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -fobjc-runtime-has-weak -x objective-c -fobjc-arc -verify %s
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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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struct Trivial {
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int f0;
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volatile int f1;
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};
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struct NonTrivial0 {
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int f0;
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__weak id f1; // expected-note 2 {{non-trivial to default-initialize}} expected-note 2 {{non-trivial to copy}}
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volatile int f2;
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id f3[10]; // expected-note 2 {{non-trivial to default-initialize}} expected-note 2 {{non-trivial to copy}}
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};
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struct NonTrivial1 {
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id f0; // expected-note 2 {{non-trivial to default-initialize}} expected-note 2 {{non-trivial to copy}}
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int f1;
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struct NonTrivial0 f2;
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};
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void testTrivial(struct Trivial *d, struct Trivial *s) {
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memset(d, 0, sizeof(struct Trivial));
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bzero(d, sizeof(struct Trivial));
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memcpy(d, s, sizeof(struct Trivial));
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memmove(d, s, sizeof(struct Trivial));
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}
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void testNonTrivial1(struct NonTrivial1 *d, struct NonTrivial1 *s) {
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memset(d, 0, sizeof(struct NonTrivial1)); // expected-warning {{that is not trivial to primitive-default-initialize}} expected-note {{explicitly cast the pointer to silence}}
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memset((void *)d, 0, sizeof(struct NonTrivial1));
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bzero(d, sizeof(struct NonTrivial1)); // expected-warning {{that is not trivial to primitive-default-initialize}} expected-note {{explicitly cast the pointer to silence}}
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memcpy(d, s, sizeof(struct NonTrivial1)); // expected-warning {{that is not trivial to primitive-copy}} expected-note {{explicitly cast the pointer to silence}}
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memmove(d, s, sizeof(struct NonTrivial1)); // expected-warning {{that is not trivial to primitive-copy}} expected-note {{explicitly cast the pointer to silence}}
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}
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