1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
//===--- Tracing.cpp ------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#include "SourceKit/Support/Tracing.h"
#include "llvm/Support/Mutex.h"
#include "llvm/Support/YAMLTraits.h"
using namespace SourceKit;
using namespace llvm;
using swift::OptionSet;
static llvm::sys::Mutex consumersLock;
// Must hold consumersLock to access.
static std::vector<trace::TraceConsumer *> consumers;
// Must hold consumersLock to modify, but can be read any time.
static std::atomic<uint64_t> tracedOperations;
//===----------------------------------------------------------------------===//
// Trace commands
//===----------------------------------------------------------------------===//
// Is tracing enabled
bool trace::anyEnabled() { return static_cast<bool>(tracedOperations); }
bool trace::enabled(OperationKind op) {
return OptionSet<OperationKind>(tracedOperations).contains(op);
}
// Trace start of perform sema call, returns OpId
uint64_t trace::startOperation(trace::OperationKind OpKind,
const trace::SwiftInvocation &Inv,
const trace::StringPairs &OpArgs) {
static std::atomic<uint64_t> operationId(0);
auto OpId = ++operationId;
if (trace::anyEnabled()) {
llvm::sys::ScopedLock L(consumersLock);
for (auto *consumer : consumers) {
consumer->operationStarted(OpId, OpKind, Inv, OpArgs);
}
}
return OpId;
}
// Operation previously started with startXXX has finished
void trace::operationFinished(uint64_t OpId, trace::OperationKind OpKind,
ArrayRef<DiagnosticEntryInfo> Diagnostics) {
if (trace::anyEnabled()) {
llvm::sys::ScopedLock L(consumersLock);
for (auto *consumer : consumers) {
consumer->operationFinished(OpId, OpKind, Diagnostics);
}
}
}
// Must be called with consumersLock held.
static void updateTracedOperations() {
OptionSet<trace::OperationKind> operations;
for (auto *consumer : consumers) {
operations |= consumer->desiredOperations();
}
// It is safe to store without a compare, because writers hold consumersLock.
tracedOperations.store(uint64_t(operations), std::memory_order_relaxed);
}
// Register trace consumer
void trace::registerConsumer(trace::TraceConsumer *Consumer) {
llvm::sys::ScopedLock L(consumersLock);
consumers.push_back(Consumer);
updateTracedOperations();
}
void trace::unregisterConsumer(trace::TraceConsumer *Consumer) {
llvm::sys::ScopedLock L(consumersLock);
consumers.erase(std::remove(consumers.begin(), consumers.end(), Consumer),
consumers.end());
updateTracedOperations();
}
|
