1657f36c7f
The addition adds three attributes for communicating ownership, analogous to existing NS_ and CF_ attributes. The attributes are meant to be used for communicating ownership of all objects in XNU (Darwin kernel) and all of the kernel modules. The ownership model there is very similar, but still different from the Foundation model, so we think that introducing a new family of attributes is appropriate. The addition required a sizeable refactoring of the existing code for CF_ and NS_ ownership attributes, due to tight coupling and the fact that differentiating between the types was previously done using a boolean. Differential Revision: https://reviews.llvm.org/D54912 llvm-svn: 347947
43 lines
1.9 KiB
C++
43 lines
1.9 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s
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struct S {
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__attribute__((os_returns_retained)) S* method_returns_retained() {
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return nullptr;
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}
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};
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__attribute__((os_returns_retained)) S *ret_retained() {
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return nullptr;
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}
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__attribute__((os_returns_retained)) S ret_retained_value() { // expected-warning{{'os_returns_retained' attribute only applies to functions that return a pointer}}
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return {};
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}
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__attribute__((os_returns_not_retained)) S *ret_not_retained() {
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return nullptr;
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}
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__attribute__((os_returns_not_retained)) S ret_not_retained_value() { // expected-warning{{'os_returns_not_retained' attribute only applies to functions that return a pointer}}
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return {};
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}
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void accept_consumed_arg(__attribute__((os_consumed)) S *arg) {}
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void accept_consumed_arg_by_value(__attribute__((os_consumed)) S arg) {} // expected-warning{{os_consumed attribute only applies to pointer parameters}}
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void accept_consumed_arg_no_extra_arg(__attribute__((os_consumed(10))) S *arg) {} // expected-error{{'os_consumed' attribute takes no arguments}}
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struct __attribute__((os_consumed)) NoAttrOnStruct {}; // expected-warning{{'os_consumed' attribute only applies to parameters}}
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__attribute__((os_returns_retained(10))) S* returns_retained_no_extra_arg() { // expected-error{{'os_returns_retained' attribute takes no arguments}}
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return nullptr;
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}
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struct __attribute__((os_returns_retained)) NoRetainAttrOnStruct {}; // expected-warning{{'os_returns_retained' attribute only applies to functions, Objective-C methods, and Objective-C properties}}
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__attribute__((os_returns_not_retained(10))) S* os_returns_no_retained_no_extra_args( S *arg) { // expected-error{{'os_returns_not_retained' attribute takes no arguments}}
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return nullptr;
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}
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struct __attribute__((os_returns_not_retained)) NoNotRetainedAttrOnStruct {}; // expected-warning{{'os_returns_not_retained' attribute only applies to functions, Objective-C methods, and Objective-C properties}}
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