1 /*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "ecmascript/dfx/cpu_profiler/sampling_processor.h"
17
18 #include <csignal>
19 #include <sys/time.h>
20 #include <unistd.h>
21
22 #include "ecmascript/dfx/cpu_profiler/samples_record.h"
23 #if defined(ENABLE_FFRT_INTERFACES)
24 #include "c/executor_task.h"
25 #endif
26
27 namespace panda::ecmascript {
28 const int USEC_PER_SEC = 1000 * 1000;
29 const int NSEC_PER_USEC = 1000;
~SamplingProcessor()30 SamplingProcessor::~SamplingProcessor() {}
31
Run(void * arg)32 void *SamplingProcessor::Run(void *arg)
33 {
34 LOG_ECMA(INFO) << "SamplingProcessor::Run start";
35 RunParams params = *reinterpret_cast<RunParams *>(arg);
36 SamplesRecord *generator = params.generator_;
37 uint32_t interval = params.interval_;
38 pthread_t jsThreadId = params.tid_;
39 pthread_t samplingThreadId = pthread_self();
40 pthread_setname_np(samplingThreadId, "SamplingThread");
41 uint64_t startTime = generator->GetThreadStartTime();
42 uint64_t endTime = startTime;
43 generator->AddStartTraceEvent();
44 while (generator->GetIsStart()) {
45 startTime = GetMicrosecondsTimeStamp();
46 int64_t ts = static_cast<int64_t>(interval) - static_cast<int64_t>(startTime - endTime);
47 endTime = startTime;
48 if (ts > 0) {
49 usleep(ts);
50 endTime = GetMicrosecondsTimeStamp();
51 }
52 #if defined(ENABLE_FFRT_INTERFACES)
53 // when the ffrt is disabled for js thread, including main thread and worker thread,
54 // then the taskHandle is a nullptr
55 if (params.taskHandle_ != nullptr) {
56 // when there are no threads running in the ffrt task,
57 // the tid returned by ffrt_task_get_tid will be zero
58 pthread_t tid = ffrt_task_get_tid(params.taskHandle_);
59 if (tid != 0) {
60 jsThreadId = tid;
61 } else {
62 uint64_t sampleTimeStamp = SamplingProcessor::GetMicrosecondsTimeStamp();
63 generator->AddEmptyStackSample(sampleTimeStamp);
64 generator->AddTraceEvent(false);
65 continue;
66 }
67 }
68 #endif // defined(ENABLE_FFRT_INTERFACES)
69 if (pthread_kill(jsThreadId, SIGPROF) != 0) {
70 LOG(ERROR, RUNTIME) << "pthread_kill signal failed";
71 return nullptr;
72 }
73 if (generator->SemWait(0) != 0) {
74 LOG_ECMA(ERROR) << "sem_[0] wait failed";
75 return nullptr;
76 }
77 if (generator->GetMethodNodeCount() + generator->GetframeStackLength() >= MAX_NODE_COUNT) {
78 LOG_ECMA(ERROR) << "SamplingProcessor::Run, exceed MAX_NODE_COUNT";
79 break;
80 }
81 if (generator->samplesQueue_->IsEmpty()) {
82 uint64_t sampleTimeStamp = SamplingProcessor::GetMicrosecondsTimeStamp();
83 generator->AddEmptyStackSample(sampleTimeStamp);
84 } else {
85 while (!generator->samplesQueue_->IsEmpty()) {
86 FrameStackAndInfo *frame = generator->samplesQueue_->PopFrame();
87 generator->AddSample(frame);
88 }
89 }
90 generator->AddTraceEvent(false);
91 }
92 generator->SetThreadStopTime();
93 generator->AddTraceEvent(true);
94 return PostSemAndLogEnd(generator, samplingThreadId);
95 }
96
PostSemAndLogEnd(SamplesRecord * generator,pthread_t tid)97 void *SamplingProcessor::PostSemAndLogEnd(SamplesRecord *generator, pthread_t tid)
98 {
99 pthread_setname_np(tid, "OS_GC_Thread");
100 if (generator->SemPost(1) != 0) {
101 LOG_ECMA(ERROR) << "sem_[1] post failed, errno = " << errno;
102 return nullptr;
103 }
104 LOG_ECMA(INFO) << "SamplingProcessor::Run end";
105 return nullptr;
106 }
107
GetMicrosecondsTimeStamp()108 uint64_t SamplingProcessor::GetMicrosecondsTimeStamp()
109 {
110 struct timespec time;
111 clock_gettime(CLOCK_MONOTONIC, &time);
112 return time.tv_sec * USEC_PER_SEC + time.tv_nsec / NSEC_PER_USEC;
113 }
114 } // namespace panda::ecmascript
115