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https://github.com/apple/swift.git
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Mike Ash
db4692534e
* Have job_run include the actor, executor, and task name. * Make task_status_changed only trace if one of the tracked values actually changed. * Add a job_enqueue_executor that covers enqueueing jobs on serial executors (default actors, custom executors, main actor, etc.). * Actually end the actor lifetime signpost interval. * Include the actor metadata and context descriptor pointers in actor enqueue/dequeue so the type can be identified. * Add the task pointer to all task-related signpost messages. * Emit job_enqueue_main_executor from the swift_task_enqueueImpl path so main actor enqueues appear in traces. * Add TracingExecutorKind enum and log executorKind in job_enqueue_executor and job_run to distinguish global, default actor, main actor, custom serial executor, and task executor contexts. While we're here, finally add a test for Concurrency signposts. This is difficult because the signposts are disabled by default and there isn't a good way to turn them on in an automated fashion. Resolve this by adding an environment variable, SWIFT_CONCURRENCY_TRACING_SUBSYSTEM, which overrides the subsystem used by the Concurrency signpost code. The test can use this to set a subsystem that isn't disabled by default, which then allows `log stream` to capture the signposts.
59 lines
1.6 KiB
C++
59 lines
1.6 KiB
C++
//===--- TracingSignpost.cpp - Tracing with the signpost API -------*- 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 - 2021 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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// Concurrency tracing implemented with the os_signpost API.
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//
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//===----------------------------------------------------------------------===//
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#if SWIFT_STDLIB_TRACING
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#include "TracingSignpost.h"
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#include "swift/Runtime/EnvironmentVariables.h"
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#include <stdio.h>
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#define SWIFT_LOG_CONCURRENCY_SUBSYSTEM "com.apple.swift.concurrency"
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#define SWIFT_LOG_ACTOR_CATEGORY "Actor"
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#define SWIFT_LOG_TASK_CATEGORY "Task"
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namespace swift {
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namespace concurrency {
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namespace trace {
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os_log_t ActorLog;
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os_log_t TaskLog;
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swift::once_t LogsToken;
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bool TracingEnabled;
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void setupLogs(void *unused) {
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if (!swift::runtime::trace::shouldEnableTracing()) {
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TracingEnabled = false;
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return;
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}
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TracingEnabled = true;
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const char *subsystem = SWIFT_LOG_CONCURRENCY_SUBSYSTEM;
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const char *envSubsystem =
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runtime::environment::concurrencyTracingSubsystem();
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if (envSubsystem && envSubsystem[0] != '\0')
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subsystem = envSubsystem;
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ActorLog = os_log_create(subsystem, SWIFT_LOG_ACTOR_CATEGORY);
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TaskLog = os_log_create(subsystem, SWIFT_LOG_TASK_CATEGORY);
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}
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} // namespace trace
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} // namespace concurrency
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} // namespace swift
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#endif
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