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cf3c131e7c
We remove the existing `swift_reflection_iterateAsyncTaskAllocations` API that attempts to provide all necessary information about a tasks's allocations starting from the task. Instead, we split it into two pieces: `swift_reflection_asyncTaskSlabPointer` to get the first slab for a task, and `+swift_reflection_asyncTaskSlabAllocations` to get the allocations in a slab, and a pointer to the next slab. We also add a dummy metadata pointer to the beginning of each slab. This allows tools to identify slab allocations on the heap without needing to locate every single async task object. They can then use `swift_reflection_asyncTaskSlabAllocations` on such allocations to find out about the contents. rdar://82549631
42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
//===--- Debug.h - Swift Concurrency debug helpers --------------*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2020 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// Debugging and inspection support.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_CONCURRENCY_DEBUG_H
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#define SWIFT_CONCURRENCY_DEBUG_H
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#include "swift/Runtime/Config.h"
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namespace swift {
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// Dispatch knows about these symbol names. Don't change them without consulting
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// dispatch.
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/// The metadata pointer used for job objects.
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SWIFT_EXPORT_FROM(swift_Concurrency)
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const void *const _swift_concurrency_debug_jobMetadata;
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/// The metadata pointer used for async task objects.
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SWIFT_EXPORT_FROM(swift_Concurrency)
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const void *const _swift_concurrency_debug_asyncTaskMetadata;
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/// A fake metadata pointer placed at the start of async task slab allocations.
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SWIFT_EXPORT_FROM(swift_Concurrency)
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const void *const _swift_concurrency_debug_asyncTaskSlabMetadata;
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} // namespace swift
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#endif
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