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e3057031da
Iterating child tasks depends on knowing the size of AsyncTask, and changing the size of the task broke it. Instead of relying on mirroring the full structure in our out-of-process definitions, add a debug variable to libswift_Concurrency that contains the size of AsyncTask. While we're there, add some more validation to child task enumeration. Check each child task's metadata pointer to make sure that it actually points to the AsyncTask metadata, and have the inner loop also increment and check ChildTaskLoopCount to stop runaway iteration in that loop.
67 lines
2.3 KiB
C++
67 lines
2.3 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 <cstdint>
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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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/// The size of an AsyncTask, in bytes.
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SWIFT_EXPORT_FROM(swift_Concurrency)
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const size_t _swift_concurrency_debug_asyncTaskSize;
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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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SWIFT_EXPORT_FROM(swift_Concurrency)
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const void *const _swift_concurrency_debug_non_future_adapter;
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SWIFT_EXPORT_FROM(swift_Concurrency)
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const void *const _swift_concurrency_debug_future_adapter;
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SWIFT_EXPORT_FROM(swift_Concurrency)
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const void *const _swift_concurrency_debug_task_wait_throwing_resume_adapter;
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SWIFT_EXPORT_FROM(swift_Concurrency)
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const void *const _swift_concurrency_debug_task_future_wait_resume_adapter;
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/// Whether the runtime we are inspecting supports priority escalation
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SWIFT_EXPORT_FROM(swift_Concurrency)
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bool _swift_concurrency_debug_supportsPriorityEscalation;
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/// The current version of internal data structures that lldb may decode.
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/// The version numbers used so far are:
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/// 1 - The initial version number when this variable was added, in swift 6.1.
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SWIFT_EXPORT_FROM(swift_Concurrency)
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uint32_t _swift_concurrency_debug_internal_layout_version;
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} // namespace swift
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#endif
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