7945435f46
For mobile applications, it's common for global destructors to never be
called (because the applications have their own lifecycle independent of
the standard C runtime), but threads are created and destroyed as normal
and so thread-local destructors are still called. -fno-static-c++-destructors
omits unnecessary global destructors, which is useful for code size, but
it also omits thread-local destructors, which is unsuitable. Add a
ternary `-fc++-static-destructors={all,none,thread-local}` option
instead to allow omitting only global destructors.
66 lines
2.8 KiB
C++
66 lines
2.8 KiB
C++
// RUN: %clang_cc1 -fc++-static-destructors=none -verify %s
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// RUN: %clang_cc1 -fc++-static-destructors=thread-local -verify=expected,thread-local-dtors %s
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// RUN: %clang_cc1 -verify=expected,thread-local-dtors,all-dtors %s
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// RUN: %clang_cc1 -fexceptions -fc++-static-destructors=none -verify %s
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// RUN: %clang_cc1 -fexceptions -fc++-static-destructors=thread-local -verify=expected,thread-local-dtors %s
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// RUN: %clang_cc1 -fexceptions -verify=expected,thread-local-dtors,all-dtors %s
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struct SecretDestructor {
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private: ~SecretDestructor(); // expected-note + {{private}}
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};
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SecretDestructor sd1; // all-dtors-error{{private}}
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thread_local SecretDestructor sd2; // thread-local-dtors-error{{private}}
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void locals() {
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static SecretDestructor sd3; // all-dtors-error{{private}}
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thread_local SecretDestructor sd4; // thread-local-dtors-error{{private}}
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}
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[[clang::always_destroy]] SecretDestructor sd6; // expected-error{{private}}
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[[clang::always_destroy]] thread_local SecretDestructor sd7; // expected-error{{private}}
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[[clang::no_destroy]] SecretDestructor sd8;
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int main() {
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[[clang::no_destroy]] int p; // expected-error{{no_destroy attribute can only be applied to a variable with static or thread storage duration}}
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[[clang::always_destroy]] int p2; // expected-error{{always_destroy attribute can only be applied to a variable with static or thread storage duration}}
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[[clang::no_destroy]] static int p3;
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[[clang::always_destroy]] static int p4;
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}
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[[clang::always_destroy]] [[clang::no_destroy]] int p; // expected-error{{'no_destroy' and 'always_destroy' attributes are not compatible}} // expected-note{{here}}
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[[clang::no_destroy]] [[clang::always_destroy]] int p2; // expected-error{{'always_destroy' and 'no_destroy' attributes are not compatible}} // expected-note{{here}}
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[[clang::always_destroy]] void f() {} // expected-warning{{'always_destroy' attribute only applies to variables}}
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struct [[clang::no_destroy]] DoesntApply {}; // expected-warning{{'no_destroy' attribute only applies to variables}}
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[[clang::no_destroy(0)]] int no_args; // expected-error{{'no_destroy' attribute takes no arguments}}
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[[clang::always_destroy(0)]] int no_args2; // expected-error{{'always_destroy' attribute takes no arguments}}
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// expected-error@+1 {{temporary of type 'SecretDestructor' has private destructor}}
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SecretDestructor arr[10];
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void local_arrays() {
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// expected-error@+1 {{temporary of type 'SecretDestructor' has private destructor}}
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static SecretDestructor arr2[10];
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// expected-error@+1 {{temporary of type 'SecretDestructor' has private destructor}}
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thread_local SecretDestructor arr3[10];
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}
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struct Base {
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~Base();
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};
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struct Derived1 {
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Derived1(int);
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Base b;
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};
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struct Derived2 {
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Derived1 b;
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};
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void dontcrash() {
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[[clang::no_destroy]] static Derived2 d2[] = {0, 0};
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}
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[[clang::no_destroy]] Derived2 d2[] = {0, 0};
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