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94 lines
2.9 KiB
C++
94 lines
2.9 KiB
C++
//===--- Tracing.cpp ------------------------------------------------------===//
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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 - 2016 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 http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#include "SourceKit/Support/Tracing.h"
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#include "swift/Frontend/Frontend.h"
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#include "llvm/Support/TimeValue.h"
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#include "llvm/Support/YAMLTraits.h"
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using namespace SourceKit;
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using namespace llvm;
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//----------------------------------------------------------------------------//
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// General
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//----------------------------------------------------------------------------//
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static std::atomic<bool> tracing_enabled(false);
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static std::atomic<uint64_t> operation_id(0);
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//----------------------------------------------------------------------------//
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// Consumers
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//----------------------------------------------------------------------------//
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struct TraceConsumerListNode {
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trace::TraceConsumer *const Consumer;
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TraceConsumerListNode *Next;
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};
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static std::atomic<TraceConsumerListNode *> consumers(nullptr);
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//----------------------------------------------------------------------------//
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// Trace commands
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//----------------------------------------------------------------------------//
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// Is tracing enabled
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bool trace::enabled() {
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return tracing_enabled;
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}
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void trace::enable() {
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tracing_enabled = true;
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}
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void trace::disable() {
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tracing_enabled = false;
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}
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// Trace start of perform sema call, returns OpId
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uint64_t trace::startOperation(trace::OperationKind OpKind,
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const trace::SwiftInvocation &Inv,
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const trace::StringPairs &OpArgs) {
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auto OpId = ++operation_id;
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if (trace::enabled()) {
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auto Node = consumers.load(std::memory_order_acquire);
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while (Node) {
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Node->Consumer->operationStarted(OpId, OpKind, Inv, OpArgs);
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Node = Node->Next;
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}
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}
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return OpId;
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}
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// Operation previously started with startXXX has finished
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void trace::operationFinished(uint64_t OpId) {
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if (trace::enabled()) {
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auto Node = consumers.load(std::memory_order_acquire);
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while (Node) {
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Node->Consumer->operationFinished(OpId);
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Node = Node->Next;
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}
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}
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}
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// Register trace consumer
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void trace::registerConsumer(trace::TraceConsumer *Consumer) {
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TraceConsumerListNode *Node = new TraceConsumerListNode {Consumer, nullptr};
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do {
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Node->Next = consumers.load(std::memory_order_relaxed);
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} while(!consumers.compare_exchange_weak(Node->Next, Node,
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std::memory_order_release,
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std::memory_order_relaxed));
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}
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