111 lines
3.4 KiB
C++
111 lines
3.4 KiB
C++
/*
|
|
* Copyright (C) 2008 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 "monitor.h"
|
|
#include "thread.h"
|
|
|
|
#include <fcntl.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/types.h>
|
|
|
|
#include "cutils/log.h"
|
|
|
|
#define EVENT_LOG_TAG_dvm_lock_sample 20003
|
|
|
|
namespace art {
|
|
|
|
static void Set4LE(uint8_t* buf, uint32_t val) {
|
|
*buf++ = (uint8_t)(val);
|
|
*buf++ = (uint8_t)(val >> 8);
|
|
*buf++ = (uint8_t)(val >> 16);
|
|
*buf = (uint8_t)(val >> 24);
|
|
}
|
|
|
|
static char* EventLogWriteInt(char* dst, int value) {
|
|
*dst++ = EVENT_TYPE_INT;
|
|
Set4LE(reinterpret_cast<uint8_t*>(dst), value);
|
|
return dst + 4;
|
|
}
|
|
|
|
static char* EventLogWriteString(char* dst, const char* value, size_t len) {
|
|
*dst++ = EVENT_TYPE_STRING;
|
|
len = len < 32 ? len : 32;
|
|
Set4LE(reinterpret_cast<uint8_t*>(dst), len);
|
|
dst += 4;
|
|
memcpy(dst, value, len);
|
|
return dst + len;
|
|
}
|
|
|
|
void Monitor::LogContentionEvent(Thread* self, uint32_t wait_ms, uint32_t sample_percent,
|
|
const char* owner_filename, uint32_t owner_line_number) {
|
|
// Emit the event list length, 1 byte.
|
|
char eventBuffer[174];
|
|
char* cp = eventBuffer;
|
|
*cp++ = 9;
|
|
|
|
// Emit the process name, <= 37 bytes.
|
|
int fd = open("/proc/self/cmdline", O_RDONLY);
|
|
char procName[33];
|
|
memset(procName, 0, sizeof(procName));
|
|
read(fd, procName, sizeof(procName) - 1);
|
|
close(fd);
|
|
size_t len = strlen(procName);
|
|
cp = EventLogWriteString(cp, procName, len);
|
|
|
|
// Emit the sensitive thread ("main thread") status, 5 bytes.
|
|
cp = EventLogWriteInt(cp, Monitor::IsSensitiveThread());
|
|
|
|
// Emit self thread name string, <= 37 bytes.
|
|
std::string thread_name;
|
|
self->GetThreadName(thread_name);
|
|
cp = EventLogWriteString(cp, thread_name.c_str(), thread_name.size());
|
|
|
|
// Emit the wait time, 5 bytes.
|
|
cp = EventLogWriteInt(cp, wait_ms);
|
|
|
|
// Emit the source code file name, <= 37 bytes.
|
|
uint32_t pc;
|
|
mirror::ArtMethod* m = self->GetCurrentMethod(&pc);
|
|
const char* filename;
|
|
uint32_t line_number;
|
|
TranslateLocation(m, pc, &filename, &line_number);
|
|
cp = EventLogWriteString(cp, filename, strlen(filename));
|
|
|
|
// Emit the source code line number, 5 bytes.
|
|
cp = EventLogWriteInt(cp, line_number);
|
|
|
|
// Emit the lock owner source code file name, <= 37 bytes.
|
|
if (owner_filename == NULL) {
|
|
owner_filename = "";
|
|
} else if (strcmp(filename, owner_filename) == 0) {
|
|
// Common case, so save on log space.
|
|
owner_filename = "-";
|
|
}
|
|
cp = EventLogWriteString(cp, owner_filename, strlen(owner_filename));
|
|
|
|
// Emit the source code line number, 5 bytes.
|
|
cp = EventLogWriteInt(cp, owner_line_number);
|
|
|
|
// Emit the sample percentage, 5 bytes.
|
|
cp = EventLogWriteInt(cp, sample_percent);
|
|
|
|
CHECK_LE((size_t)(cp - eventBuffer), sizeof(eventBuffer));
|
|
android_btWriteLog(EVENT_LOG_TAG_dvm_lock_sample, EVENT_TYPE_LIST, eventBuffer,
|
|
(size_t)(cp - eventBuffer));
|
|
}
|
|
|
|
} // namespace art
|