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/**
* Copyright (C) ARM Limited 2014-2016. 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 "AtraceDriver.h"
#include <unistd.h>
#include "Logging.h"
#include "OlyUtility.h"
#include "SessionData.h"
class AtraceCounter : public DriverCounter {
public:
AtraceCounter(DriverCounter *next, char *name, int flag);
~AtraceCounter();
int getFlag() const { return mFlag; }
private:
const int mFlag;
// Intentionally unimplemented
AtraceCounter(const AtraceCounter &);
AtraceCounter &operator=(const AtraceCounter &);
};
AtraceCounter::AtraceCounter(DriverCounter *next, char *name, int flag) : DriverCounter(next, name), mFlag(flag) {
}
AtraceCounter::~AtraceCounter() {
}
AtraceDriver::AtraceDriver() : mSupported(false), mNotifyPath() {
}
AtraceDriver::~AtraceDriver() {
}
void AtraceDriver::readEvents(mxml_node_t *const xml) {
if (access("/system/bin/setprop", X_OK) != 0) {
// Reduce warning noise
//logg.logSetup("Atrace is disabled\nUnable to find setprop, this is not an Android target");
return;
}
if (!gSessionData.mFtraceDriver.isSupported()) {
logg.logSetup("Atrace is disabled\nSupport for ftrace is required");
return;
}
if (getApplicationFullPath(mNotifyPath, sizeof(mNotifyPath)) != 0) {
logg.logMessage("Unable to determine the full path of gatord, the cwd will be used");
}
strncat(mNotifyPath, "notify.dex", sizeof(mNotifyPath) - strlen(mNotifyPath) - 1);
if (access(mNotifyPath, W_OK) != 0) {
logg.logSetup("Atrace is disabled\nUnable to locate notify.dex");
return;
}
mSupported = true;
mxml_node_t *node = xml;
while (true) {
node = mxmlFindElement(node, xml, "event", NULL, NULL, MXML_DESCEND);
if (node == NULL) {
break;
}
const char *counter = mxmlElementGetAttr(node, "counter");
if (counter == NULL) {
continue;
}
if (strncmp(counter, "atrace_", 7) != 0) {
continue;
}
const char *flagStr = mxmlElementGetAttr(node, "flag");
if (flagStr == NULL) {
logg.logError("The atrace counter %s is missing the required flag attribute", counter);
handleException();
}
int flag;
if (!stringToInt(&flag, flagStr, 16)) {
logg.logError("The flag attribute of the atrace counter %s is not a hex integer", counter);
handleException();
}
setCounters(new AtraceCounter(getCounters(), strdup(counter), flag));
}
}
void AtraceDriver::setAtrace(const int flags) {
logg.logMessage("Setting atrace flags to %i", flags);
pid_t pid = fork();
if (pid < 0) {
logg.logError("fork failed");
handleException();
} else if (pid == 0) {
char buf[1<<10];
snprintf(buf, sizeof(buf), "setprop debug.atrace.tags.enableflags %i; "
"CLASSPATH=%s app_process /system/bin Notify", flags, mNotifyPath);
execlp("sh", "sh", "-c", buf, NULL);
exit(0);
}
}
void AtraceDriver::start() {
if (!mSupported) {
return;
}
int flags = 0;
for (AtraceCounter *counter = static_cast<AtraceCounter *>(getCounters()); counter != NULL; counter = static_cast<AtraceCounter *>(counter->getNext())) {
if (!counter->isEnabled()) {
continue;
}
flags |= counter->getFlag();
}
setAtrace(flags);
}
void AtraceDriver::stop() {
if (!mSupported) {
return;
}
setAtrace(0);
}
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