98 lines
3.0 KiB
C++
98 lines
3.0 KiB
C++
// Verify that coroutine promise and allocated memory are freed up on exception.
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// RUN: %clang_cc1 -std=c++1z -fcoroutines-ts -triple=x86_64-unknown-linux-gnu -emit-llvm -o - %s -fexceptions -fcxx-exceptions -disable-llvm-passes | FileCheck %s
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namespace std::experimental {
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template <typename... T> struct coroutine_traits;
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template <class Promise = void> struct coroutine_handle {
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coroutine_handle() = default;
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static coroutine_handle from_address(void *) noexcept;
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};
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template <> struct coroutine_handle<void> {
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static coroutine_handle from_address(void *) noexcept;
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coroutine_handle() = default;
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template <class PromiseType>
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coroutine_handle(coroutine_handle<PromiseType>) noexcept;
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};
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}
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struct suspend_always {
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bool await_ready() noexcept;
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void await_suspend(std::experimental::coroutine_handle<>) noexcept;
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void await_resume() noexcept;
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};
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template <> struct std::experimental::coroutine_traits<void> {
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struct promise_type {
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void get_return_object() noexcept;
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suspend_always initial_suspend() noexcept;
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suspend_always final_suspend() noexcept;
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void return_void() noexcept;
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promise_type();
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~promise_type();
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void unhandled_exception() noexcept;
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};
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};
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struct Cleanup { ~Cleanup(); };
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void may_throw();
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// CHECK-LABEL: define void @_Z1fv(
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void f() {
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// CHECK: call i8* @_Znwm(i64
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// If promise constructor throws, check that we free the memory.
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// CHECK: invoke void @_ZNSt12experimental16coroutine_traitsIJvEE12promise_typeC1Ev(
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// CHECK-NEXT: to label %{{.+}} unwind label %[[DeallocPad:.+]]
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// CHECK: [[DeallocPad]]:
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// CHECK-NEXT: landingpad
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// CHECK-NEXT: cleanup
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// CHECK: br label %[[Dealloc:.+]]
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Cleanup cleanup;
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may_throw();
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// if may_throw throws, check that we destroy the promise and free the memory.
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// CHECK: invoke void @_Z9may_throwv(
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// CHECK-NEXT: to label %{{.+}} unwind label %[[CatchPad:.+]]
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// CHECK: [[CatchPad]]:
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// CHECK-NEXT: landingpad
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// CHECK-NEXT: catch i8* null
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// CHECK: call void @_ZN7CleanupD1Ev(
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// CHECK: br label %[[Catch:.+]]
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// CHECK: [[Catch]]:
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// CHECK: call i8* @__cxa_begin_catch(
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// CHECK: call void @_ZNSt12experimental16coroutine_traitsIJvEE12promise_type19unhandled_exceptionEv(
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// CHECK: invoke void @__cxa_end_catch()
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// CHECK-NEXT: to label %[[Cont:.+]] unwind
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// CHECK: [[Cont]]:
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// CHECK-NEXT: br label %[[Cont2:.+]]
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// CHECK: [[Cont2]]:
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// CHECK-NEXT: br label %[[Cleanup:.+]]
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// CHECK: [[Cleanup]]:
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// CHECK: call void @_ZNSt12experimental16coroutine_traitsIJvEE12promise_typeD1Ev(
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// CHECK: %[[Mem0:.+]] = call i8* @llvm.coro.free(
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// CHECK: call void @_ZdlPv(i8* %[[Mem0]]
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// CHECK: [[Dealloc]]:
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// CHECK: %[[Mem:.+]] = call i8* @llvm.coro.free(
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// CHECK: call void @_ZdlPv(i8* %[[Mem]])
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co_return;
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}
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// CHECK-LABEL: define void @_Z1gv(
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void g() {
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for (;;)
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co_await suspend_always{};
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// Since this is the endless loop there should be no fallthrough handler (call to 'return_void').
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// CHECK-NOT: call void @_ZNSt12experimental16coroutine_traitsIJvEE12promise_type11return_voidEv
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}
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