void
eventHelper_initialize(jbyte sessionID)
{
jvmtiStartFunction func;
currentSessionID = sessionID;
holdEvents = JNI_FALSE;
commandQueue.head = NULL;
commandQueue.tail = NULL;
commandQueueLock = debugMonitorCreate("JDWP Event Helper Queue Monitor");
commandCompleteLock = debugMonitorCreate("JDWP Event Helper Completion Monitor");
blockCommandLoopLock = debugMonitorCreate("JDWP Event Block CommandLoop Monitor");
/* Start the event handler thread */
func = &commandLoop;
(void)spawnNewThread(func, NULL, "JDWP Event Helper Thread");
}
jdwpError
transport_startTransport(jboolean isServer, char *name, char *address,
long timeout)
{
jvmtiStartFunction func;
jdwpTransportEnv *trans;
char threadName[MAXPATHLEN + 100];
jint err;
jdwpError serror;
/*
* If the transport is already loaded then use it
* Note: We're assuming here that we don't support multiple
* transports - when we do then we need to handle the case
* where the transport library only supports a single environment.
* That probably means we have a bag a transport environments
* to correspond to the transports bag.
*/
if (transport != NULL) {
trans = transport;
} else {
serror = loadTransport(name, &trans);
if (serror != JDWP_ERROR(NONE)) {
return serror;
}
}
if (isServer) {
char *retAddress;
char *launchCommand;
TransportInfo *info;
jvmtiError error;
int len;
char* prop_value;
info = jvmtiAllocate(sizeof(*info));
if (info == NULL) {
return JDWP_ERROR(OUT_OF_MEMORY);
}
info->name = jvmtiAllocate((int)strlen(name)+1);
(void)strcpy(info->name, name);
info->address = NULL;
info->timeout = timeout;
if (info->name == NULL) {
serror = JDWP_ERROR(OUT_OF_MEMORY);
goto handleError;
}
if (address != NULL) {
info->address = jvmtiAllocate((int)strlen(address)+1);
(void)strcpy(info->address, address);
if (info->address == NULL) {
serror = JDWP_ERROR(OUT_OF_MEMORY);
goto handleError;
}
}
info->transport = trans;
err = (*trans)->StartListening(trans, address, &retAddress);
if (err != JDWPTRANSPORT_ERROR_NONE) {
printLastError(trans, err);
serror = JDWP_ERROR(TRANSPORT_INIT);
goto handleError;
}
/*
* Record listener address in a system property
*/
len = (int)strlen(name) + (int)strlen(retAddress) + 2; /* ':' and '\0' */
prop_value = (char*)jvmtiAllocate(len);
strcpy(prop_value, name);
strcat(prop_value, ":");
strcat(prop_value, retAddress);
setTransportProperty(getEnv(), prop_value);
jvmtiDeallocate(prop_value);
(void)strcpy(threadName, "JDWP Transport Listener: ");
(void)strcat(threadName, name);
func = &acceptThread;
error = spawnNewThread(func, (void*)info, threadName);
if (error != JVMTI_ERROR_NONE) {
serror = map2jdwpError(error);
goto handleError;
}
launchCommand = debugInit_launchOnInit();
if (launchCommand != NULL) {
serror = launch(launchCommand, name, retAddress);
if (serror != JDWP_ERROR(NONE)) {
goto handleError;
}
} else {
if ( ! gdata->quiet ) {
TTY_MESSAGE(("Listening for transport %s at address: %s",
name, retAddress));
}
}
return JDWP_ERROR(NONE);
handleError:
jvmtiDeallocate(info->name);
jvmtiDeallocate(info->address);
jvmtiDeallocate(info);
} else {
/*
* Note that we don't attempt to do a launch here. Launching
* is currently supported only in server mode.
*/
/*
* If we're connecting to another process, there shouldn't be
* any concurrent listens, so its ok if we block here in this
* thread, waiting for the attach to finish.
*/
err = (*trans)->Attach(trans, address, timeout, 0);
if (err != JDWPTRANSPORT_ERROR_NONE) {
printLastError(trans, err);
serror = JDWP_ERROR(TRANSPORT_INIT);
return serror;
}
/*
* Start the transport loop in a separate thread
*/
(void)strcpy(threadName, "JDWP Transport Listener: ");
(void)strcat(threadName, name);
func = &attachThread;
err = spawnNewThread(func, (void*)trans, threadName);
serror = map2jdwpError(err);
}
return serror;
}
void
debugLoop_run(void)
{
jboolean shouldListen;
jdwpPacket p;
jvmtiStartFunction func;
/* Initialize all statics */
/* We may be starting a new connection after an error */
cmdQueue = NULL;
cmdQueueLock = debugMonitorCreate("JDWP Command Queue Lock");
transportError = JNI_FALSE;
shouldListen = JNI_TRUE;
func = &reader;
(void)spawnNewThread(func, NULL, "JDWP Command Reader");
standardHandlers_onConnect();
threadControl_onConnect();
/* Okay, start reading cmds! */
while (shouldListen) {
if (!dequeue(&p)) {
break;
}
if (p.type.cmd.flags & JDWPTRANSPORT_FLAGS_REPLY) {
/*
* Its a reply packet.
*/
continue;
} else {
/*
* Its a cmd packet.
*/
jdwpCmdPacket *cmd = &p.type.cmd;
PacketInputStream in;
PacketOutputStream out;
CommandHandler func;
/* Should reply be sent to sender.
* For error handling, assume yes, since
* only VM/exit does not reply
*/
jboolean replyToSender = JNI_TRUE;
/*
* For VirtualMachine.Resume commands we hold the resumeLock
* while executing and replying to the command. This ensures
* that a Resume after VM_DEATH will be allowed to complete
* before the thread posting the VM_DEATH continues VM
* termination.
*/
if (resumeCommand(cmd)) {
debugMonitorEnter(resumeLock);
}
/* Initialize the input and output streams */
inStream_init(&in, p);
outStream_initReply(&out, inStream_id(&in));
LOG_MISC(("Command set %d, command %d", cmd->cmdSet, cmd->cmd));
func = debugDispatch_getHandler(cmd->cmdSet,cmd->cmd);
if (func == NULL) {
/* we've never heard of this, so I guess we
* haven't implemented it.
* Handle gracefully for future expansion
* and platform / vendor expansion.
*/
outStream_setError(&out, JDWP_ERROR(NOT_IMPLEMENTED));
} else if (gdata->vmDead &&
((cmd->cmdSet) != JDWP_COMMAND_SET(VirtualMachine))) {
/* Protect the VM from calls while dead.
* VirtualMachine cmdSet quietly ignores some cmds
* after VM death, so, it sends it's own errors.
*/
outStream_setError(&out, JDWP_ERROR(VM_DEAD));
} else {
/* Call the command handler */
replyToSender = func(&in, &out);
}
/* Reply to the sender */
if (replyToSender) {
if (inStream_error(&in)) {
outStream_setError(&out, inStream_error(&in));
}
outStream_sendReply(&out);
}
/*
* Release the resumeLock as the reply has been posted.
*/
if (resumeCommand(cmd)) {
debugMonitorExit(resumeLock);
}
inStream_destroy(&in);
outStream_destroy(&out);
shouldListen = !lastCommand(cmd);
}
}
threadControl_onDisconnect();
standardHandlers_onDisconnect();
/*
* Cut off the transport immediately. This has the effect of
* cutting off any events that the eventHelper thread might
* be trying to send.
*/
transport_close();
debugMonitorDestroy(cmdQueueLock);
/* Reset for a new connection to this VM if it's still alive */
if ( ! gdata->vmDead ) {
debugInit_reset(getEnv());
}
}