concurrency-leaks.swift

// RUN: %empty-directory(%t)
// RUN: %target-swift-frontend -enable-experimental-feature Embedded -parse-as-library %s -c -o %t/a.o -g -O
// RUN: %target-clang -x c -std=c11 -c %S/Inputs/debug-malloc.c -o %t/debug-malloc.o -g
// RUN: %target-clang %t/a.o %t/debug-malloc.o -o %t/a.out -L%swift_obj_root/lib/swift/embedded/%target-cpu-apple-macos -lswift_Concurrency -lswift_ConcurrencyDefaultExecutor -dead_strip -g
// RUN: %target-run %t/a.out | %FileCheck %s

// REQUIRES: executable_test
// REQUIRES: swift_in_compiler
// REQUIRES: optimized_stdlib
// REQUIRES: OS=macosx
// REQUIRES: swift_feature_Embedded

import _Concurrency

@main
structMain{
staticfunc main()async{
print("start")
 // CHECK: start
do{
letx=Task{
return42
}
 _ =await x.value
}
 // There should be exactly 4 allocations involved:
 // - 2x 32 bytes ... closure context for swift_task_create, closure object to pass to Task.init
 // - 1x 320 bytes ... malloc(amountToAllocate) in swift_task_create_common for the Task heap object itself
 // - 1x 1016 bytes ... the initial StackAllocator slab in the task-specific allocator
 // Check that they are all accounted for and free'd.

 // CHECK: malloc({{[0-9]+}})-> [[M1:0x[0-9a-f]+]]
 // CHECK: malloc({{[0-9]+}})-> [[M2:0x[0-9a-f]+]]
 // CHECK: malloc({{[0-9]+}})-> [[M3:0x[0-9a-f]+]]
 // CHECK: malloc({{[0-9]+}})-> [[M4:0x[0-9a-f]+]]
 // CHECK: free([[M1]])
 // CHECK: free([[M2]])
 // CHECK: free([[M4]])
 // CHECK: free([[M3]])

print("done")
 // CHECK: done
}
}