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/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <time.h>
#include <android-base/file.h>
#include <android-base/properties.h>
#include <android-base/stringprintf.h>
#include <android-base/strings.h>
#include <wakelock/wakelock.h>
#include <include/simpleperf_profcollect.hpp>
#include "ETMRecorder.h"
#include "command.h"
#include "event_attr.h"
#include "event_fd.h"
#include "event_selection_set.h"
#include "event_type.h"
using namespace simpleperf;
namespace {
class CommandRegister {
public:
CommandRegister() {
RegisterRecordCommand();
RegisterInjectCommand();
}
};
CommandRegister command_register;
} // namespace
bool IsETMDriverAvailable() {
bool result = ETMRecorder::GetInstance().IsETMDriverAvailable();
LOG(INFO) << "HasDriverSupport result " << result;
return result;
}
bool IsETMDeviceAvailable() {
auto result = ETMRecorder::GetInstance().CheckEtmSupport();
if (!result.ok()) {
if (result.error().find("can't find etr device") != std::string::npos) {
// Trigger a manual probe of etr. It may take effect the next time running
// IsETMDeviceAvailable().
std::string prop_name = "profcollectd.etr.probe";
bool res = android::base::SetProperty(prop_name, "1");
if (!res) {
LOG(ERROR) << "fails to setprop" << prop_name;
}
}
LOG(INFO) << "HasDeviceSupport check failed: " << result.error();
return false;
}
const EventType* type = FindEventTypeByName("cs-etm", false);
if (type == nullptr) {
LOG(INFO) << "HasDeviceSupport check failed: no etm event";
return false;
}
bool ret = IsEventAttrSupported(CreateDefaultPerfEventAttr(*type), type->name);
LOG(INFO) << "HasDeviceSupport result " << ret;
return ret;
}
bool IsLBRAvailable() {
return IsBranchSamplingSupported();
}
static std::vector<std::string> ConvertArgs(const char** args, int arg_count) {
std::vector<std::string> cmd_args(arg_count);
for (int i = 0; i < arg_count; ++i) {
cmd_args[i] = args[i];
}
return cmd_args;
}
bool RunRecordCmd(const char** args, int arg_count) {
std::vector<std::string> cmd_args = ConvertArgs(args, arg_count);
LOG(INFO) << "Record " << android::base::Join(cmd_args, " ");
// The kernel may panic when trying to hibernate or hotplug CPUs while collecting
// ETM data. So get wakelock to keep the CPUs on.
auto wakelock = android::wakelock::WakeLock::tryGet("profcollectd");
if (!wakelock) {
LOG(ERROR) << "Record failed: Failed to request wakelock.";
return false;
}
bool result = CreateCommandInstance("record")->Run(cmd_args);
LOG(INFO) << "Record result " << result;
return result;
}
bool RunInjectCmd(const char** args, int arg_count) {
std::vector<std::string> cmd_args = ConvertArgs(args, arg_count);
LOG(INFO) << "Inject " << android::base::Join(cmd_args, " ");
bool result = CreateCommandInstance("inject")->Run(cmd_args);
LOG(INFO) << "Inject result " << result;
return result;
}
static android::base::unique_fd log_fd;
static android::base::LogFunction saved_log_func;
static void FileLogger(android::base::LogId id, android::base::LogSeverity severity,
const char* tag, const char* file, unsigned int line, const char* message) {
if (log_fd.ok()) {
static const char log_characters[] = "VDIWEFF";
char severity_char = log_characters[severity];
struct tm now;
time_t t = time(nullptr);
localtime_r(&t, &now);
char timestamp[32];
strftime(timestamp, sizeof(timestamp), "%m-%d %H:%M:%S", &now);
std::string s = android::base::StringPrintf("%s %c %s %s:%u] %s\n", tag, severity_char,
timestamp, file, line, message);
WriteStringToFd(s, log_fd);
}
saved_log_func(id, severity, tag, file, line, message);
}
void SetLogFile(const char* filename) {
int fd = TEMP_FAILURE_RETRY(open(filename, O_APPEND | O_CREAT | O_WRONLY | O_CLOEXEC, 0600));
if (fd == -1) {
PLOG(ERROR) << "failed to open " << filename;
return;
}
log_fd.reset(fd);
saved_log_func = SetLogger(FileLogger);
}
void ResetLogFile() {
log_fd.reset();
SetLogger(std::move(saved_log_func));
}
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