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/**
* Copyright (C) ARM Limited 2010-2014. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include "SessionData.h"
#include <string.h>
#include "SessionXML.h"
#include "Logging.h"
SessionData* gSessionData = NULL;
SessionData::SessionData() {
initialize();
}
SessionData::~SessionData() {
}
void SessionData::initialize() {
mWaitingOnCommand = false;
mSessionIsActive = false;
mLocalCapture = false;
mOneShot = false;
readCpuInfo();
mConfigurationXMLPath = NULL;
mSessionXMLPath = NULL;
mEventsXMLPath = NULL;
mTargetPath = NULL;
mAPCDir = NULL;
mSampleRate = 0;
mLiveRate = 0;
mDuration = 0;
mBacktraceDepth = 0;
mTotalBufferSize = 0;
// sysconf(_SC_NPROCESSORS_CONF) is unreliable on 2.6 Android, get the value from the kernel module
mCores = 1;
mPageSize = 0;
}
void SessionData::parseSessionXML(char* xmlString) {
SessionXML session(xmlString);
session.parse();
// Set session data values - use prime numbers just below the desired value to reduce the chance of events firing at the same time
if (strcmp(session.parameters.sample_rate, "high") == 0) {
mSampleRate = 9973; // 10000
} else if (strcmp(session.parameters.sample_rate, "normal") == 0) {
mSampleRate = 997; // 1000
} else if (strcmp(session.parameters.sample_rate, "low") == 0) {
mSampleRate = 97; // 100
} else if (strcmp(session.parameters.sample_rate, "none") == 0) {
mSampleRate = 0;
} else {
logg->logError(__FILE__, __LINE__, "Invalid sample rate (%s) in session xml.", session.parameters.sample_rate);
handleException();
}
mBacktraceDepth = session.parameters.call_stack_unwinding == true ? 128 : 0;
mDuration = session.parameters.duration;
// Determine buffer size (in MB) based on buffer mode
mOneShot = true;
if (strcmp(session.parameters.buffer_mode, "streaming") == 0) {
mOneShot = false;
mTotalBufferSize = 1;
} else if (strcmp(session.parameters.buffer_mode, "small") == 0) {
mTotalBufferSize = 1;
} else if (strcmp(session.parameters.buffer_mode, "normal") == 0) {
mTotalBufferSize = 4;
} else if (strcmp(session.parameters.buffer_mode, "large") == 0) {
mTotalBufferSize = 16;
} else {
logg->logError(__FILE__, __LINE__, "Invalid value for buffer mode in session xml.");
handleException();
}
mImages = session.parameters.images;
// Convert milli- to nanoseconds
mLiveRate = session.parameters.live_rate * (int64_t)1000000;
if (mLiveRate > 0 && mLocalCapture) {
logg->logMessage("Local capture is not compatable with live, disabling live");
mLiveRate = 0;
}
}
void SessionData::readCpuInfo() {
char temp[256]; // arbitrarily large amount
strcpy(mCoreName, "unknown");
memset(&mCpuIds, -1, sizeof(mCpuIds));
mMaxCpuId = -1;
FILE* f = fopen("/proc/cpuinfo", "r");
if (f == NULL) {
logg->logMessage("Error opening /proc/cpuinfo\n"
"The core name in the captured xml file will be 'unknown'.");
return;
}
bool foundCoreName = false;
int processor = 0;
while (fgets(temp, sizeof(temp), f)) {
if (strlen(temp) > 0) {
temp[strlen(temp) - 1] = 0; // Replace the line feed with a null
}
const bool foundHardware = strstr(temp, "Hardware") != 0;
const bool foundCPUPart = strstr(temp, "CPU part") != 0;
const bool foundProcessor = strstr(temp, "processor") != 0;
if (foundHardware || foundCPUPart || foundProcessor) {
char* position = strchr(temp, ':');
if (position == NULL || (unsigned int)(position - temp) + 2 >= strlen(temp)) {
logg->logMessage("Unknown format of /proc/cpuinfo\n"
"The core name in the captured xml file will be 'unknown'.");
return;
}
position += 2;
if (foundHardware) {
strncpy(mCoreName, position, sizeof(mCoreName));
mCoreName[sizeof(mCoreName) - 1] = 0; // strncpy does not guarantee a null-terminated string
foundCoreName = true;
}
if (foundCPUPart) {
mCpuIds[processor] = strtol(position, NULL, 0);
// If this does not have the full topology in /proc/cpuinfo, mCpuIds[0] may not have the 1 CPU part emitted - this guarantees it's in mMaxCpuId
if (mCpuIds[processor] > mMaxCpuId) {
mMaxCpuId = mCpuIds[processor];
}
}
if (foundProcessor) {
processor = strtol(position, NULL, 0);
}
}
}
if (!foundCoreName) {
logg->logMessage("Could not determine core name from /proc/cpuinfo\n"
"The core name in the captured xml file will be 'unknown'.");
}
fclose(f);
}
int getEventKey() {
// key 0 is reserved as a timestamp
// key 1 is reserved as the marker for thread specific counters
// Odd keys are assigned by the driver, even keys by the daemon
static int key = 2;
const int ret = key;
key += 2;
return ret;
}
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