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/base/config.h"
23 #include "ecmascript/dfx/cpu_profiler/cpu_profiler.h"
24 #include "ecmascript/dfx/cpu_profiler/samples_record.h"
25 #include "ecmascript/ecma_vm.h"
26 #include "ecmascript/log_wrapper.h"
27
28 namespace panda::ecmascript {
29 const int USEC_PER_SEC = 1000 * 1000;
30 const int NSEC_PER_USEC = 1000;
~SamplingProcessor()31 SamplingProcessor::~SamplingProcessor() {}
32
Run(void * arg)33 void *SamplingProcessor::Run(void *arg)
34 {
35 RunParams params = *reinterpret_cast<RunParams *>(arg);
36 SamplesRecord *generator = params.generatorParam;
37 uint32_t interval = params.intervalParam;
38 pthread_t pid = params.pidParam;
39 pthread_t tid = pthread_self();
40 pthread_setname_np(tid, "SamplingThread");
41 uint64_t startTime = GetMicrosecondsTimeStamp();
42 uint64_t endTime = startTime;
43 generator->SetThreadStartTime(startTime);
44 generator->AddStartTraceEvent();
45 while (generator->GetIsStart()) {
46 if (pthread_kill(pid, SIGPROF) != 0) {
47 LOG(ERROR, RUNTIME) << "pthread_kill signal failed";
48 return nullptr;
49 }
50 if (generator->SemWait(0) != 0) {
51 LOG_ECMA(ERROR) << "sem_[0] wait failed";
52 return nullptr;
53 }
54 startTime = GetMicrosecondsTimeStamp();
55 int64_t ts = static_cast<int64_t>(interval) - static_cast<int64_t>(startTime - endTime);
56 endTime = startTime;
57 if (ts > 0) {
58 usleep(ts);
59 endTime = GetMicrosecondsTimeStamp();
60 }
61 if (generator->GetMethodNodeCount() + generator->GetframeStackLength() >= MAX_NODE_COUNT) {
62 break;
63 }
64 if (generator->samplesQueue_->IsEmpty()) {
65 uint64_t sampleTimeStamp = SamplingProcessor::GetMicrosecondsTimeStamp();
66 generator->AddEmptyStackSample(sampleTimeStamp);
67 } else {
68 while (!generator->samplesQueue_->IsEmpty()) {
69 FrameStackAndInfo *frame = generator->samplesQueue_->PopFrame();
70 generator->AddSample(frame);
71 }
72 }
73 generator->AddTraceEvent(false);
74 }
75 generator->SetThreadStopTime();
76 generator->AddTraceEvent(true);
77 pthread_setname_np(tid, "OS_GC_Thread");
78 if (generator->SemPost(1) != 0) {
79 LOG_ECMA(ERROR) << "sem_[1] post failed";
80 return nullptr;
81 }
82 return nullptr;
83 }
84
GetMicrosecondsTimeStamp()85 uint64_t SamplingProcessor::GetMicrosecondsTimeStamp()
86 {
87 struct timespec time;
88 clock_gettime(CLOCK_MONOTONIC, &time);
89 return time.tv_sec * USEC_PER_SEC + time.tv_nsec / NSEC_PER_USEC;
90 }
91 } // namespace panda::ecmascript
92