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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.
36 lines
1.2 KiB
C++
36 lines
1.2 KiB
C++
// RUN: %clang_cc1 %s -fc++-static-destructors=none -emit-llvm -triple x86_64-apple-macosx10.13.0 -o - | \
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// RUN: FileCheck --check-prefixes=CHECK,NO-DTORS %s
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// RUN: %clang_cc1 %s -fc++-static-destructors=thread-local -emit-llvm -triple x86_64-apple-macosx10.13.0 -o - | \
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// RUN: FileCheck --check-prefixes=CHECK,THREAD-LOCAL-DTORS %s
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struct NonTrivial {
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~NonTrivial();
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};
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// CHECK-NOT: __cxa_atexit{{.*}}_ZN10NonTrivialD1Ev
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NonTrivial nt1;
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// NO-DTORS-NOT: _tlv_atexit{{.*}}_ZN10NonTrivialD1Ev
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// THREAD-LOCAL-DTORS: _tlv_atexit{{.*}}_ZN10NonTrivialD1Ev
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thread_local NonTrivial nt2;
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struct NonTrivial2 {
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~NonTrivial2();
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};
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// CHECK: __cxa_atexit{{.*}}_ZN11NonTrivial2D1Ev
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[[clang::always_destroy]] NonTrivial2 nt21;
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// CHECK: _tlv_atexit{{.*}}_ZN11NonTrivial2D1Ev
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[[clang::always_destroy]] thread_local NonTrivial2 nt22;
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void f() {
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// CHECK: __cxa_atexit{{.*}}_ZN11NonTrivial2D1Ev
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[[clang::always_destroy]] static NonTrivial2 nt21;
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// CHECK: _tlv_atexit{{.*}}_ZN11NonTrivial2D1Ev
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[[clang::always_destroy]] thread_local NonTrivial2 nt22;
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}
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// CHECK-NOT: __cxa_atexit{{.*}}_ZN10NonTrivialD1Ev
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[[clang::no_destroy]] NonTrivial nt3;
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// CHECK-NOT: _tlv_atexit{{.*}}_ZN10NonTrivialD1Ev
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[[clang::no_destroy]] thread_local NonTrivial nt4;
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