/** Start executing the program. */
@Execute
public void stepStartExecution(final RequestMonitor rm) {
if (fBackend.getSessionType() != SessionType.CORE) {
// Overwrite the program name to use the binary name that was specified.
// This is important for multi-process
// Bug 342351
fAttributes.put(ICDTLaunchConfigurationConstants.ATTR_PROGRAM_NAME, fBinaryName);
fProcService.start(
getContainerContext(),
fAttributes,
new DataRequestMonitor<IContainerDMContext>(ImmediateExecutor.getInstance(), rm) {
@Override
protected void handleSuccess() {
assert getData() instanceof IMIContainerDMContext;
// Set the container that we created
setContainerContext(
DMContexts.getAncestorOfType(getData(), IMIContainerDMContext.class));
fDataRequestMonitor.setData(getContainerContext());
// Don't call fDataRequestMonitor.done(), the sequence will
// automatically do that when it completes;
rm.done();
}
});
} else {
fDataRequestMonitor.setData(getContainerContext());
rm.done();
}
}
/**
* This method does the necessary work to setup the input/output streams for the inferior process,
* by either preparing the PTY to be used, or by simply leaving the PTY null, which indicates that
* the input/output streams of the CLI should be used instead; this decision is based on the type
* of session.
*/
@Execute
public void stepInitializeInputOutput(final RequestMonitor rm) {
if (fBackend.getSessionType() == SessionType.REMOTE && !fBackend.getIsAttachSession()) {
// Remote non-attach sessions don't support multi-process and therefore will not
// start new processes. Those sessions will only start the one process, which should
// not have a console, because it's output is handled by GDB server.
fPty = null;
rm.done();
} else {
// Every other type of session that can get to this code, is starting a new process
// and requires a pty for it.
try {
fPty = new PTY();
// Tell GDB to use this PTY
fCommandControl.queueCommand(
fCommandFactory.createMIInferiorTTYSet(
(IMIContainerDMContext) getContainerContext(), fPty.getSlaveName()),
new ImmediateDataRequestMonitor<MIInfo>(rm) {
@Override
protected void handleFailure() {
// We were not able to tell GDB to use the PTY
// so we won't use it at all.
fPty = null;
rm.done();
}
});
} catch (IOException e) {
fPty = null;
rm.done();
}
}
}
/** @return true if supports fetching OS info from /proc pseudo-filesystem */
private boolean supportsProcPseudoFS() {
if (Platform.getOS().equals(Platform.OS_LINUX)) return true;
// for non-linux platform, support only remote (linux? ) targets
if (SessionType.REMOTE == fBackend.getSessionType()) {
return true;
}
return false;
}
/**
* Start tracking the breakpoints. Note that for remote debugging we should first connect to the
* target.
*/
@Execute
public void stepStartTrackingBreakpoints(RequestMonitor rm) {
if (fBackend.getSessionType() != SessionType.CORE) {
MIBreakpointsManager bpmService = fTracker.getService(MIBreakpointsManager.class);
IBreakpointsTargetDMContext bpTargetDmc =
DMContexts.getAncestorOfType(getContainerContext(), IBreakpointsTargetDMContext.class);
bpmService.startTrackingBreakpoints(bpTargetDmc, rm);
} else {
rm.done();
}
}
/**
* This method indicates if we should use the -exec-continue command instead of the -exec-run
* command. This method can be overridden to allow for customization.
*/
protected boolean useContinueCommand() {
// Note that restart does not apply to remote sessions
IGDBBackend backend = fTracker.getService(IGDBBackend.class);
if (backend == null) {
return false;
}
// When doing remote non-attach debugging, we use -exec-continue instead of -exec-run
// For remote attach, if we get here it is that we are starting a new process
// (multi-process), so we want to use -exec-run
return backend.getSessionType() == SessionType.REMOTE && !backend.getIsAttachSession();
}
/**
* If we are dealing with a remote debugging session, connect to the target.
*
* @since 4.0
*/
@Execute
public void stepRemoteConnection(RequestMonitor rm) {
// If we are dealing with a non-attach remote session, it is now time to connect
// to the remote side. Note that this is the 'target remote' case
// and not the 'target extended-remote' case (remote attach session)
// This step is actually global for GDB. However, we have to do it after
// we have specified the executable, so we have to do it here.
// It is safe to do it here because a 'target remote' does not support
// multi-process so this step will not be executed more than once.
if (fBackend.getSessionType() == SessionType.REMOTE && !fBackend.getIsAttachSession()) {
boolean isTcpConnection =
CDebugUtils.getAttribute(
fAttributes, IGDBLaunchConfigurationConstants.ATTR_REMOTE_TCP, false);
if (isTcpConnection) {
String remoteTcpHost =
CDebugUtils.getAttribute(
fAttributes, IGDBLaunchConfigurationConstants.ATTR_HOST, INVALID);
String remoteTcpPort =
CDebugUtils.getAttribute(
fAttributes, IGDBLaunchConfigurationConstants.ATTR_PORT, INVALID);
fCommandControl.queueCommand(
fCommandFactory.createMITargetSelect(
fCommandControl.getContext(), remoteTcpHost, remoteTcpPort, false),
new DataRequestMonitor<MIInfo>(ImmediateExecutor.getInstance(), rm));
} else {
String serialDevice =
CDebugUtils.getAttribute(
fAttributes, IGDBLaunchConfigurationConstants.ATTR_DEV, INVALID);
fCommandControl.queueCommand(
fCommandFactory.createMITargetSelect(fCommandControl.getContext(), serialDevice, false),
new DataRequestMonitor<MIInfo>(ImmediateExecutor.getInstance(), rm));
}
} else {
rm.done();
}
}
/**
* If we are dealing with a postmortem session, connect to the core/trace file.
*
* @since 4.0
*/
@Execute
public void stepSpecifyCoreFile(final RequestMonitor rm) {
// If we are dealing with a postmortem session, it is now time to connect
// to the core/trace file. We have to do this step after
// we have specified the executable, so we have to do it here.
// It is safe to do it here because a postmortem session does not support
// multi-process so this step will not be executed more than once.
// Bug 338730
if (fBackend.getSessionType() == SessionType.CORE) {
String coreFile =
CDebugUtils.getAttribute(
fAttributes, ICDTLaunchConfigurationConstants.ATTR_COREFILE_PATH, ""); // $NON-NLS-1$
final String coreType =
CDebugUtils.getAttribute(
fAttributes,
IGDBLaunchConfigurationConstants.ATTR_DEBUGGER_POST_MORTEM_TYPE,
IGDBLaunchConfigurationConstants.DEBUGGER_POST_MORTEM_TYPE_DEFAULT);
if (coreFile.length() == 0) {
new PromptForCoreJob(
"Prompt for post mortem file", //$NON-NLS-1$
new DataRequestMonitor<String>(getExecutor(), rm) {
@Override
protected void handleCancel() {
rm.cancel();
rm.done();
}
@Override
protected void handleSuccess() {
String newCoreFile = getData();
if (newCoreFile == null || newCoreFile.length() == 0) {
rm.setStatus(
new Status(
IStatus.ERROR,
GdbPlugin.PLUGIN_ID,
-1,
"Cannot get post mortem file path",
null)); //$NON-NLS-1$
rm.done();
} else {
if (coreType.equals(
IGDBLaunchConfigurationConstants.DEBUGGER_POST_MORTEM_CORE_FILE)) {
fCommandControl.queueCommand(
fCommandFactory.createMITargetSelectCore(
fCommandControl.getContext(), newCoreFile),
new DataRequestMonitor<MIInfo>(getExecutor(), rm));
} else if (coreType.equals(
IGDBLaunchConfigurationConstants.DEBUGGER_POST_MORTEM_TRACE_FILE)) {
IGDBTraceControl traceControl = fTracker.getService(IGDBTraceControl.class);
if (traceControl != null) {
ITraceTargetDMContext targetDmc =
DMContexts.getAncestorOfType(
fCommandControl.getContext(), ITraceTargetDMContext.class);
traceControl.loadTraceData(targetDmc, newCoreFile, rm);
} else {
rm.setStatus(
new Status(
IStatus.ERROR,
GdbPlugin.PLUGIN_ID,
-1,
"Tracing not supported",
null));
rm.done();
}
} else {
rm.setStatus(
new Status(
IStatus.ERROR,
GdbPlugin.PLUGIN_ID,
-1,
"Invalid post-mortem type",
null));
rm.done();
}
}
}
})
.schedule();
} else {
if (coreType.equals(IGDBLaunchConfigurationConstants.DEBUGGER_POST_MORTEM_CORE_FILE)) {
fCommandControl.queueCommand(
fCommandFactory.createMITargetSelectCore(fCommandControl.getContext(), coreFile),
new DataRequestMonitor<MIInfo>(getExecutor(), rm));
} else if (coreType.equals(
IGDBLaunchConfigurationConstants.DEBUGGER_POST_MORTEM_TRACE_FILE)) {
IGDBTraceControl traceControl = fTracker.getService(IGDBTraceControl.class);
if (traceControl != null) {
ITraceTargetDMContext targetDmc =
DMContexts.getAncestorOfType(
fCommandControl.getContext(), ITraceTargetDMContext.class);
traceControl.loadTraceData(targetDmc, coreFile, rm);
} else {
rm.setStatus(
new Status(IStatus.ERROR, GdbPlugin.PLUGIN_ID, -1, "Tracing not supported", null));
rm.done();
}
} else {
rm.setStatus(
new Status(IStatus.ERROR, GdbPlugin.PLUGIN_ID, -1, "Invalid post-mortem type", null));
rm.done();
}
}
} else {
rm.done();
}
}
/**
* This method processes "load info" requests. The load is computed using a sampling method; two
* readings of a local or remote /proc/stat file are done with a delay in between. Then the load
* is computed from the two samples, for all CPUs/cores known in the system.
*
* <p>Because of the method used, it's possible that fast variations in CPU usage will be missed.
* However longer load trends should be reflected in the results.
*
* <p>To avoid generating too much load in the remote case, there is a cache that will return the
* already computed load, if requested multiple times in a short period. There is also a mechanism
* to queue subsequent requests if one is ongoing. Upon completion of the ongoing request, any
* queued request is answered with the load that was just computed.
*
* @since 4.2
*/
@Override
public void getLoadInfo(final IDMContext context, final DataRequestMonitor<ILoadInfo> rm) {
if (!(context instanceof ICoreDMContext) && !(context instanceof ICPUDMContext)) {
// we only support getting the load for a CPU or a core
rm.done(
new Status(
IStatus.ERROR,
GdbPlugin.PLUGIN_ID,
INVALID_HANDLE,
"Load information not supported for this context type",
null)); //$NON-NLS-1$
return;
}
// The measurement interval should be of a minimum length to be meaningful
assert (LOAD_SAMPLE_DELAY >= 100);
// so the cache is useful
assert (LOAD_CACHE_LIFETIME >= LOAD_SAMPLE_DELAY);
// This way of computing the CPU load is only applicable to Linux
if (!supportsProcPseudoFS()) {
rm.done(
new Status(
IStatus.ERROR,
GdbPlugin.PLUGIN_ID,
NOT_SUPPORTED,
"Operation not supported",
null)); //$NON-NLS-1$
return;
}
// Is a request is already ongoing?
if (fLoadRequestOngoing) {
// queue current new request
fLoadInfoRequestCache.put(context, rm);
return;
}
// no request ongoing, so proceed
fLoadRequestOngoing = true;
// caching mechanism to keep things sane, even if the views(s)
// request load information very often.
long currentTime = System.currentTimeMillis();
// time to fetch fresh load information?
if (fLastCpuLoadRefresh + LOAD_CACHE_LIFETIME < currentTime) {
fLastCpuLoadRefresh = currentTime;
} else {
// not time yet... re-use cached load data
processLoads(context, rm, fCachedLoads);
fLoadRequestOngoing = false;
return;
}
final ProcStatParser procStatParser = new ProcStatParser();
final ICommandControlDMContext dmc =
DMContexts.getAncestorOfType(context, ICommandControlDMContext.class);
final String statFile = "/proc/stat"; // $NON-NLS-1$
final String localFile = sTempFolder + "proc.stat." + getSession().getId(); // $NON-NLS-1$
// Remote debugging? We will ask GDB to get us the /proc/stat file from target, twice, with a
// delay between.
if (fBackend.getSessionType() == SessionType.REMOTE) {
fCommandControl.queueCommand(
fCommandFactory.createCLIRemoteGet(dmc, statFile, localFile),
new ImmediateDataRequestMonitor<MIInfo>(rm) {
@Override
protected void handleCompleted() {
if (!isSuccess()) {
fLoadRequestOngoing = false;
rm.done(
new Status(
IStatus.ERROR,
GdbPlugin.PLUGIN_ID,
INTERNAL_ERROR,
"Can't get load info for CPU",
null)); //$NON-NLS-1$
return;
}
// Success - parse first set of stat counters
try {
procStatParser.parseStatFile(localFile);
} catch (Exception e) {
rm.done(
new Status(
IStatus.ERROR,
GdbPlugin.PLUGIN_ID,
INTERNAL_ERROR,
"Can't get load info for CPU",
null)); //$NON-NLS-1$
fLoadRequestOngoing = false;
return;
}
// delete temp file
new File(localFile).delete();
getExecutor()
.schedule(
new Runnable() {
@Override
public void run() {
fCommandControl.queueCommand(
fCommandFactory.createCLIRemoteGet(dmc, statFile, localFile),
new ImmediateDataRequestMonitor<MIInfo>(rm) {
@Override
protected void handleCompleted() {
if (!isSuccess()) {
fLoadRequestOngoing = false;
rm.done(
new Status(
IStatus.ERROR,
GdbPlugin.PLUGIN_ID,
INTERNAL_ERROR,
"Can't get load info for CPU",
null)); //$NON-NLS-1$
return;
}
// Success - parse the second set of stat counters and compute
// loads
try {
procStatParser.parseStatFile(localFile);
} catch (Exception e) {
rm.done(
new Status(
IStatus.ERROR,
GdbPlugin.PLUGIN_ID,
INTERNAL_ERROR,
"Can't get load info for CPU",
null)); //$NON-NLS-1$
fLoadRequestOngoing = false;
return;
}
// delete temp file
new File(localFile).delete();
// Compute load
fCachedLoads = procStatParser.getCpuLoad();
processLoads(context, rm, fCachedLoads);
// done with request
fLoadRequestOngoing = false;
// process any queued request
for (Entry<IDMContext, DataRequestMonitor<ILoadInfo>> e :
fLoadInfoRequestCache.entrySet()) {
processLoads(e.getKey(), e.getValue(), fCachedLoads);
}
fLoadInfoRequestCache.clear();
}
});
}
},
LOAD_SAMPLE_DELAY,
TimeUnit.MILLISECONDS);
}
});
// Local debugging? Then we can read /proc/stat directly
} else {
// Read /proc/stat file for the first time
try {
procStatParser.parseStatFile(statFile);
} catch (Exception e) {
rm.done(
new Status(
IStatus.ERROR,
GdbPlugin.PLUGIN_ID,
INTERNAL_ERROR,
"Can't get load info for CPU",
null)); //$NON-NLS-1$
fLoadRequestOngoing = false;
return;
}
// Read /proc/stat file again after a delay
getExecutor()
.schedule(
new Runnable() {
@Override
public void run() {
try {
procStatParser.parseStatFile(statFile);
} catch (Exception e) {
rm.done(
new Status(
IStatus.ERROR,
GdbPlugin.PLUGIN_ID,
INTERNAL_ERROR,
"Can't get load info for CPU",
null)); //$NON-NLS-1$
fLoadRequestOngoing = false;
return;
}
// compute load
fCachedLoads = procStatParser.getCpuLoad();
processLoads(context, rm, fCachedLoads);
// done with request
fLoadRequestOngoing = false;
// process any queued request
for (Entry<IDMContext, DataRequestMonitor<ILoadInfo>> e :
fLoadInfoRequestCache.entrySet()) {
processLoads(e.getKey(), e.getValue(), fCachedLoads);
}
fLoadInfoRequestCache.clear();
}
},
LOAD_SAMPLE_DELAY,
TimeUnit.MILLISECONDS);
}
}