/*
* TO DO: Support processing of replies through command input streams.
*/
void
inStream_init(PacketInputStream *stream, jdwpPacket packet)
{
stream->packet = packet;
stream->error = JDWP_ERROR(NONE);
stream->left = packet.type.cmd.len;
stream->current = packet.type.cmd.data;
stream->refs = bagCreateBag(sizeof(jobject), INITIAL_REF_ALLOC);
if (stream->refs == NULL) {
stream->error = JDWP_ERROR(OUT_OF_MEMORY);
}
}
jdwpError
outStream_writeValue(JNIEnv *env, PacketOutputStream *out,
jbyte typeKey, jvalue value)
{
if (typeKey == JDWP_TAG(OBJECT)) {
(void)outStream_writeByte(out, specificTypeKey(env, value.l));
} else {
(void)outStream_writeByte(out, typeKey);
}
if (isObjectTag(typeKey)) {
(void)outStream_writeObjectRef(env, out, value.l);
} else {
switch (typeKey) {
case JDWP_TAG(BYTE):
return outStream_writeByte(out, value.b);
case JDWP_TAG(CHAR):
return outStream_writeChar(out, value.c);
case JDWP_TAG(FLOAT):
return outStream_writeFloat(out, value.f);
case JDWP_TAG(DOUBLE):
return outStream_writeDouble(out, value.d);
case JDWP_TAG(INT):
return outStream_writeInt(out, value.i);
case JDWP_TAG(LONG):
return outStream_writeLong(out, value.j);
case JDWP_TAG(SHORT):
return outStream_writeShort(out, value.s);
case JDWP_TAG(BOOLEAN):
return outStream_writeBoolean(out, value.z);
case JDWP_TAG(VOID): /* happens with function return values */
/* write nothing */
return JDWP_ERROR(NONE);
default:
EXIT_ERROR(AGENT_ERROR_INVALID_OBJECT,"Invalid type key");
break;
}
}
return JDWP_ERROR(NONE);
}
/*
* Read an object from the stream. The ID used in the wire protocol
* is converted to a reference which is returned. The reference is
* global and strong, but it should *not* be deleted by the caller
* since it is freed when this stream is destroyed.
*/
jobject
inStream_readObjectRef(PacketInputStream *stream)
{
jobject ref;
jobject *refPtr;
jlong id = inStream_readLong(stream);
if (stream->error) {
return NULL;
}
if (id == NULL_OBJECT_ID) {
return NULL;
}
ref = commonRef_idToRef(id);
if (ref == NULL) {
stream->error = JDWP_ERROR(INVALID_OBJECT);
return NULL;
}
refPtr = bagAdd(stream->refs);
if (refPtr == NULL) {
commonRef_idToRef_delete(NULL, ref);
return NULL;
}
*refPtr = ref;
return ref;
}
/**
* This is the back-end implementation for disabling
* (what are at the JDI level) EventRequests.
*/
static jboolean
clearCommand(PacketInputStream *in, PacketOutputStream *out)
{
jvmtiError error;
jdwpEvent eventType;
HandlerID handlerID;
EventIndex ei;
eventType = inStream_readByte(in);
if (inStream_error(in)) {
return JNI_TRUE;
}
handlerID = inStream_readInt(in);
if (inStream_error(in)) {
return JNI_TRUE;
}
ei = jdwp2EventIndex(eventType);
if (ei == 0) {
/* NOTE: Clear command not yet spec'ed to return INVALID_EVENT_TYPE */
outStream_setError(out, JDWP_ERROR(INVALID_EVENT_TYPE));
return JNI_TRUE;
}
error = eventHandler_freeByID(ei, handlerID);
if (error != JVMTI_ERROR_NONE) {
outStream_setError(out, map2jdwpError(error));
}
return JNI_TRUE;
}
static void
commonInit(PacketOutputStream *stream)
{
stream->current = &stream->initialSegment[0];
stream->left = sizeof(stream->initialSegment);
stream->segment = &stream->firstSegment;
stream->segment->length = 0;
stream->segment->data = &stream->initialSegment[0];
stream->segment->next = NULL;
stream->error = JDWP_ERROR(NONE);
stream->sent = JNI_FALSE;
stream->ids = bagCreateBag(sizeof(jlong), INITIAL_ID_ALLOC);
if (stream->ids == NULL) {
stream->error = JDWP_ERROR(OUT_OF_MEMORY);
}
}
void
outStream_setError(PacketOutputStream *stream, jdwpError error)
{
if (stream->error == JDWP_ERROR(NONE)) {
stream->error = error;
LOG_MISC(("outStream_setError error=%s(%d)", jdwpErrorText(error), error));
}
}
jvalue
inStream_readValue(PacketInputStream *stream, jbyte *typeKeyPtr)
{
jvalue value;
jbyte typeKey = inStream_readByte(stream);
if (stream->error) {
value.j = 0L;
return value;
}
if (isObjectTag(typeKey)) {
value.l = inStream_readObjectRef(stream);
} else {
switch (typeKey) {
case JDWP_TAG(BYTE):
value.b = inStream_readByte(stream);
break;
case JDWP_TAG(CHAR):
value.c = inStream_readChar(stream);
break;
case JDWP_TAG(FLOAT):
value.f = inStream_readFloat(stream);
break;
case JDWP_TAG(DOUBLE):
value.d = inStream_readDouble(stream);
break;
case JDWP_TAG(INT):
value.i = inStream_readInt(stream);
break;
case JDWP_TAG(LONG):
value.j = inStream_readLong(stream);
break;
case JDWP_TAG(SHORT):
value.s = inStream_readShort(stream);
break;
case JDWP_TAG(BOOLEAN):
value.z = inStream_readBoolean(stream);
break;
default:
stream->error = JDWP_ERROR(INVALID_TAG);
break;
}
}
if (typeKeyPtr) {
*typeKeyPtr = typeKey;
}
return value;
}
static jdwpError
launch(char *command, char *name, char *address)
{
jint rc;
char *buf;
char *commandLine;
int len;
/* Construct complete command line (all in UTF-8) */
commandLine = jvmtiAllocate((int)strlen(command) +
(int)strlen(name) +
(int)strlen(address) + 3);
if (commandLine == NULL) {
return JDWP_ERROR(OUT_OF_MEMORY);
}
(void)strcpy(commandLine, command);
(void)strcat(commandLine, " ");
(void)strcat(commandLine, name);
(void)strcat(commandLine, " ");
(void)strcat(commandLine, address);
/* Convert commandLine from UTF-8 to platform encoding */
len = (int)strlen(commandLine);
buf = jvmtiAllocate(len*3+3);
(void)(gdata->npt->utf8ToPlatform)(gdata->npt->utf,
(jbyte*)commandLine, len, buf, len*3+3);
/* Exec commandLine */
rc = dbgsysExec(buf);
/* Free up buffers */
jvmtiDeallocate(buf);
jvmtiDeallocate(commandLine);
/* And non-zero exit status means we had an error */
if (rc != SYS_OK) {
return JDWP_ERROR(TRANSPORT_INIT);
}
return JDWP_ERROR(NONE);
}
static jdwpError
writeBytes(PacketOutputStream *stream, void *source, int size)
{
jbyte *bytes = (jbyte *)source;
if (stream->error) {
return stream->error;
}
while (size > 0) {
jint count;
if (stream->left == 0) {
jint segSize = SMALLEST(2 * stream->segment->length, MAX_SEGMENT_SIZE);
jbyte *newSeg = jvmtiAllocate(segSize);
struct PacketData *newHeader = jvmtiAllocate(sizeof(*newHeader));
if ((newSeg == NULL) || (newHeader == NULL)) {
jvmtiDeallocate(newSeg);
jvmtiDeallocate(newHeader);
stream->error = JDWP_ERROR(OUT_OF_MEMORY);
return stream->error;
}
newHeader->length = 0;
newHeader->data = newSeg;
newHeader->next = NULL;
stream->segment->next = newHeader;
stream->segment = newHeader;
stream->current = newHeader->data;
stream->left = segSize;
}
count = SMALLEST(size, stream->left);
(void)memcpy(stream->current, bytes, count);
stream->current += count;
stream->left -= count;
stream->segment->length += count;
size -= count;
bytes += count;
}
return JDWP_ERROR(NONE);
}
static jint
outStream_send(PacketOutputStream *stream) {
jint rc;
jint len = 0;
PacketData *segment;
jbyte *data, *posP;
/*
* If there's only 1 segment then we just send the
* packet.
*/
if (stream->firstSegment.next == NULL) {
stream->packet.type.cmd.len = 11 + stream->firstSegment.length;
stream->packet.type.cmd.data = stream->firstSegment.data;
rc = transport_sendPacket(&stream->packet);
return rc;
}
/*
* Multiple segments
*/
len = 0;
segment = (PacketData *)&(stream->firstSegment);
do {
len += segment->length;
segment = segment->next;
} while (segment != NULL);
data = jvmtiAllocate(len);
if (data == NULL) {
return JDWP_ERROR(OUT_OF_MEMORY);
}
posP = data;
segment = (PacketData *)&(stream->firstSegment);
while (segment != NULL) {
(void)memcpy(posP, segment->data, segment->length);
posP += segment->length;
segment = segment->next;
}
stream->packet.type.cmd.len = 11 + len;
stream->packet.type.cmd.data = data;
rc = transport_sendPacket(&stream->packet);
stream->packet.type.cmd.data = NULL;
jvmtiDeallocate(data);
return rc;
}
jdwpError
outStream_writeObjectRef(JNIEnv *env, PacketOutputStream *stream, jobject val)
{
jlong id;
jlong *idPtr;
if (stream->error) {
return stream->error;
}
if (val == NULL) {
id = NULL_OBJECT_ID;
} else {
/* Convert the object to an object id */
id = commonRef_refToID(env, val);
if (id == NULL_OBJECT_ID) {
stream->error = JDWP_ERROR(OUT_OF_MEMORY);
return stream->error;
}
/* Track the common ref in case we need to release it on a future error */
idPtr = bagAdd(stream->ids);
if (idPtr == NULL) {
commonRef_release(env, id);
stream->error = JDWP_ERROR(OUT_OF_MEMORY);
return stream->error;
} else {
*idPtr = id;
}
/* Add the encoded object id to the stream */
id = HOST_TO_JAVA_LONG(id);
}
return writeBytes(stream, &id, sizeof(id));
}
static void *
newComponents(PacketOutputStream *out, jint length, size_t nbytes)
{
void *ptr = NULL;
if ( length > 0 ) {
ptr = jvmtiAllocate(length*((jint)nbytes));
if ( ptr == NULL ) {
outStream_setError(out, JDWP_ERROR(OUT_OF_MEMORY));
} else {
(void)memset(ptr, 0, length*nbytes);
}
}
return ptr;
}
jint
eventFilter_setCountFilter(HandlerNode *node, jint index,
jint count)
{
CountFilter *filter = &FILTER(node, index).u.Count;
if (index >= FILTER_COUNT(node)) {
return JVMDI_ERROR_ILLEGAL_ARGUMENT;
}
if (count <= 0) {
return JDWP_ERROR(INVALID_COUNT);
} else {
FILTER(node, index).modifier = JDWP_REQUEST_MODIFIER(Count);
filter->count = count;
return JVMDI_ERROR_NONE;
}
}
jthreadGroup
inStream_readThreadGroupRef(PacketInputStream *stream)
{
jobject object = inStream_readObjectRef(stream);
if (object == NULL) {
/*
* Could be error or just the null reference. In either case,
* stop now.
*/
return NULL;
}
if (!isThreadGroup(object)) {
stream->error = JDWP_ERROR(INVALID_THREAD_GROUP);
return NULL;
}
return object;
}
jarray
inStream_readArrayRef(PacketInputStream *stream)
{
jobject object = inStream_readObjectRef(stream);
if (object == NULL) {
/*
* Could be error or just the null reference. In either case,
* stop now.
*/
return NULL;
}
if (!isArray(object)) {
stream->error = JDWP_ERROR(INVALID_ARRAY);
return NULL;
}
return object;
}
jthread
inStream_readThreadRef(JNIEnv *env, PacketInputStream *stream)
{
jobject object = inStream_readObjectRef(env, stream);
if (object == NULL) {
/*
* Could be error or just the null reference. In either case,
* stop now.
*/
return NULL;
}
if (!isThread(object)) {
stream->error = JDWP_ERROR(INVALID_THREAD);
return NULL;
}
return object;
}
jclass
inStream_readClassLoaderRef(PacketInputStream *stream)
{
jobject object = inStream_readObjectRef(stream);
if (object == NULL) {
/*
* Could be error or just the null reference. In either case,
* stop now.
*/
return NULL;
}
if (!isClassLoader(object)) {
stream->error = JDWP_ERROR(INVALID_CLASS_LOADER);
return NULL;
}
return object;
}
jstring
inStream_readStringRef(PacketInputStream *stream)
{
jobject object = inStream_readObjectRef(stream);
if (object == NULL) {
/*
* Could be error or just the null reference. In either case,
* stop now.
*/
return NULL;
}
if (!isString(object)) {
stream->error = JDWP_ERROR(INVALID_STRING);
return NULL;
}
return object;
}
static jdwpError
readBytes(PacketInputStream *stream, void *dest, int size)
{
if (stream->error) {
return stream->error;
}
if (size > stream->left) {
stream->error = JDWP_ERROR(INTERNAL);
return stream->error;
}
if (dest) {
(void)memcpy(dest, stream->current, size);
}
stream->current += size;
stream->left -= size;
return stream->error;
}
/*
* Restore all static data to the initialized state so that another
* debugger can connect properly later.
*/
void
debugInit_reset(JNIEnv *env)
{
EnumerateArg arg;
LOG_MISC(("debugInit_reset() beginning"));
currentSessionID++;
initComplete = JNI_FALSE;
eventHandler_reset(currentSessionID);
transport_reset();
debugDispatch_reset();
invoker_reset();
stepControl_reset();
threadControl_reset();
util_reset();
commonRef_reset(env);
classTrack_reset();
/*
* If this is a server, we are now ready to accept another connection.
* If it's a client, then we've cleaned up some (more should be added
* later) and we're done.
*/
if (isServer) {
arg.isServer = JNI_TRUE;
arg.error = JDWP_ERROR(NONE);
arg.startCount = 0;
(void)bagEnumerateOver(transports, startTransport, &arg);
signalInitComplete();
transport_waitForConnection();
} else {
signalInitComplete(); /* Why? */
}
LOG_MISC(("debugInit_reset() completed."));
}
static jboolean
startTransport(void *item, void *arg)
{
TransportSpec *transport = item;
EnumerateArg *enumArg = arg;
jdwpError serror;
LOG_MISC(("Begin startTransport"));
serror = transport_startTransport(enumArg->isServer, transport->name,
transport->address, transport->timeout);
if (serror != JDWP_ERROR(NONE)) {
ERROR_MESSAGE(("JDWP Transport %s failed to initialize, %s(%d)",
transport->name, jdwpErrorText(serror), serror));
enumArg->error = serror;
} else {
/* (Don't overwrite any previous error) */
enumArg->startCount++;
}
LOG_MISC(("End startTransport"));
return JNI_TRUE; /* Always continue, even if there was an error */
}
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());
}
}
/**
* Take JDWP "modifiers" (which are JDI explicit filters, like
* addCountFilter(), and implicit filters, like the LocationOnly
* filter that goes with breakpoints) and add them as filters
* (eventFilter) to the HandlerNode (eventHandler).
*/
static jdwpError
readAndSetFilters(JNIEnv *env, PacketInputStream *in, HandlerNode *node,
jint filterCount)
{
int i;
jdwpError serror = JDWP_ERROR(NONE);
for (i = 0; i < filterCount; ++i) {
jbyte modifier;
modifier = inStream_readByte(in);
if ( (serror = inStream_error(in)) != JDWP_ERROR(NONE) )
break;
switch (modifier) {
case JDWP_REQUEST_MODIFIER(Conditional): {
jint exprID;
exprID = inStream_readInt(in);
if ( (serror = inStream_error(in)) != JDWP_ERROR(NONE) )
break;
serror = map2jdwpError(
eventFilter_setConditionalFilter(node, i, exprID));
break;
}
case JDWP_REQUEST_MODIFIER(Count): {
jint count;
count = inStream_readInt(in);
if ( (serror = inStream_error(in)) != JDWP_ERROR(NONE) )
break;
serror = map2jdwpError(
eventFilter_setCountFilter(node, i, count));
break;
}
case JDWP_REQUEST_MODIFIER(ThreadOnly): {
jthread thread;
thread = inStream_readThreadRef(env, in);
if ( (serror = inStream_error(in)) != JDWP_ERROR(NONE) )
break;
serror = map2jdwpError(
eventFilter_setThreadOnlyFilter(node, i, thread));
break;
}
case JDWP_REQUEST_MODIFIER(LocationOnly): {
jbyte tag;
jclass clazz;
jmethodID method;
jlocation location;
tag = inStream_readByte(in); /* not currently used */
tag = tag; /* To shut up lint */
if ( (serror = inStream_error(in)) != JDWP_ERROR(NONE) )
break;
clazz = inStream_readClassRef(env, in);
if ( (serror = inStream_error(in)) != JDWP_ERROR(NONE) )
break;
method = inStream_readMethodID(in);
if ( (serror = inStream_error(in)) != JDWP_ERROR(NONE) )
break;
location = inStream_readLocation(in);
if ( (serror = inStream_error(in)) != JDWP_ERROR(NONE) )
break;
serror = map2jdwpError(
eventFilter_setLocationOnlyFilter(node, i, clazz, method, location));
break;
}
case JDWP_REQUEST_MODIFIER(FieldOnly): {
jclass clazz;
jfieldID field;
clazz = inStream_readClassRef(env, in);
if ( (serror = inStream_error(in)) != JDWP_ERROR(NONE) )
break;
field = inStream_readFieldID(in);
if ( (serror = inStream_error(in)) != JDWP_ERROR(NONE) )
break;
serror = map2jdwpError(
eventFilter_setFieldOnlyFilter(node, i, clazz, field));
break;
}
case JDWP_REQUEST_MODIFIER(ClassOnly): {
jclass clazz;
clazz = inStream_readClassRef(env, in);
if ( (serror = inStream_error(in)) != JDWP_ERROR(NONE) )
break;
serror = map2jdwpError(
eventFilter_setClassOnlyFilter(node, i, clazz));
break;
}
case JDWP_REQUEST_MODIFIER(ExceptionOnly): {
jclass exception;
jboolean caught;
jboolean uncaught;
exception = inStream_readClassRef(env, in);
if ( (serror = inStream_error(in)) != JDWP_ERROR(NONE) )
break;
caught = inStream_readBoolean(in);
if ( (serror = inStream_error(in)) != JDWP_ERROR(NONE) )
break;
uncaught = inStream_readBoolean(in);
if ( (serror = inStream_error(in)) != JDWP_ERROR(NONE) )
break;
serror = map2jdwpError(
eventFilter_setExceptionOnlyFilter(node, i,
exception, caught, uncaught));
break;
}
case JDWP_REQUEST_MODIFIER(InstanceOnly): {
jobject instance;
instance = inStream_readObjectRef(env, in);
if ( (serror = inStream_error(in)) != JDWP_ERROR(NONE) )
break;
serror = map2jdwpError(
eventFilter_setInstanceOnlyFilter(node, i, instance));
break;
}
case JDWP_REQUEST_MODIFIER(ClassMatch): {
char *pattern;
pattern = inStream_readString(in);
if ( (serror = inStream_error(in)) != JDWP_ERROR(NONE) )
break;
serror = map2jdwpError(
eventFilter_setClassMatchFilter(node, i,
pattern));
break;
}
case JDWP_REQUEST_MODIFIER(ClassExclude): {
char *pattern;
pattern = inStream_readString(in);
if ( (serror = inStream_error(in)) != JDWP_ERROR(NONE) )
break;
serror = map2jdwpError(
eventFilter_setClassExcludeFilter(node, i, pattern));
break;
}
case JDWP_REQUEST_MODIFIER(Step): {
jthread thread;
jint size;
jint depth;
thread = inStream_readThreadRef(env, in);
if ( (serror = inStream_error(in)) != JDWP_ERROR(NONE) )
break;
size = inStream_readInt(in);
if ( (serror = inStream_error(in)) != JDWP_ERROR(NONE) )
break;
depth = inStream_readInt(in);
if ( (serror = inStream_error(in)) != JDWP_ERROR(NONE) )
break;
serror = map2jdwpError(
eventFilter_setStepFilter(node, i, thread, size, depth));
break;
}
case JDWP_REQUEST_MODIFIER(SourceNameMatch): {
char *sourceNamePattern;
sourceNamePattern = inStream_readString(in);
if ( (serror = inStream_error(in)) != JDWP_ERROR(NONE) ) {
break;
}
serror = map2jdwpError(
eventFilter_setSourceNameMatchFilter(node, i, sourceNamePattern));
break;
}
default:
serror = JDWP_ERROR(ILLEGAL_ARGUMENT);
break;
}
if ( serror != JDWP_ERROR(NONE) )
break;
}
return serror;
}
/**
* This is the back-end implementation for enabling
* (what are at the JDI level) EventRequests.
*
* Allocate the event request handler (eventHandler).
* Add any filters (explicit or implicit).
* Install the handler.
* Return the handlerID which is used to map subsequent
* events to the EventRequest that created it.
*/
static jboolean
setCommand(PacketInputStream *in, PacketOutputStream *out)
{
jdwpError serror;
HandlerNode *node;
HandlerID requestID = -1;
jdwpEvent eventType;
jbyte suspendPolicy;
jint filterCount;
EventIndex ei;
node = NULL;
eventType = inStream_readByte(in);
if (inStream_error(in)) {
return JNI_TRUE;
}
suspendPolicy = inStream_readByte(in);
if (inStream_error(in)) {
return JNI_TRUE;
}
filterCount = inStream_readInt(in);
if (inStream_error(in)) {
return JNI_TRUE;
}
ei = jdwp2EventIndex(eventType);
if (ei == 0) {
outStream_setError(out, JDWP_ERROR(INVALID_EVENT_TYPE));
return JNI_TRUE;
}
if (ei == EI_VM_INIT) {
/*
* VM is already initialized so there's no need to install a handler
* for this event. However we need to allocate a requestID to send in
* the reply to the debugger.
*/
serror = JDWP_ERROR(NONE);
requestID = eventHandler_allocHandlerID();
} else {
node = eventHandler_alloc(filterCount, ei, suspendPolicy);
if (node == NULL) {
outStream_setError(out, JDWP_ERROR(OUT_OF_MEMORY));
return JNI_TRUE;
}
if (eventType == JDWP_EVENT(METHOD_EXIT_WITH_RETURN_VALUE)) {
node->needReturnValue = 1;
} else {
node->needReturnValue = 0;
}
serror = readAndSetFilters(getEnv(), in, node, filterCount);
if (serror == JDWP_ERROR(NONE)) {
jvmtiError error;
error = eventHandler_installExternal(node);
serror = map2jdwpError(error);
if (serror == JDWP_ERROR(NONE)) {
requestID = node->handlerID;
}
}
}
if (serror == JDWP_ERROR(NONE)) {
(void)outStream_writeInt(out, requestID);
} else {
(void)eventHandler_free(node);
outStream_setError(out, serror);
}
return JNI_TRUE;
}
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;
}
/*
* Initialize debugger back end modules
*/
static void
initialize(JNIEnv *env, jthread thread, EventIndex triggering_ei)
{
jvmtiError error;
EnumerateArg arg;
jbyte suspendPolicy;
LOG_MISC(("Begin initialize()"));
currentSessionID = 0;
initComplete = JNI_FALSE;
if ( gdata->vmDead ) {
EXIT_ERROR(AGENT_ERROR_INTERNAL,"VM dead at initialize() time");
}
/* Turn off the initial JVMTI event notifications */
error = set_event_notification(JVMTI_DISABLE, EI_EXCEPTION);
if (error != JVMTI_ERROR_NONE) {
EXIT_ERROR(error, "unable to disable JVMTI event notification");
}
error = set_event_notification(JVMTI_DISABLE, EI_VM_INIT);
if (error != JVMTI_ERROR_NONE) {
EXIT_ERROR(error, "unable to disable JVMTI event notification");
}
error = set_event_notification(JVMTI_DISABLE, EI_VM_DEATH);
if (error != JVMTI_ERROR_NONE) {
EXIT_ERROR(error, "unable to disable JVMTI event notification");
}
/* Remove initial event callbacks */
(void)memset(&(gdata->callbacks),0,sizeof(gdata->callbacks));
error = JVMTI_FUNC_PTR(gdata->jvmti,SetEventCallbacks)
(gdata->jvmti, &(gdata->callbacks), sizeof(gdata->callbacks));
if (error != JVMTI_ERROR_NONE) {
EXIT_ERROR(error, "unable to clear JVMTI callbacks");
}
commonRef_initialize();
util_initialize(env);
threadControl_initialize();
stepControl_initialize();
invoker_initialize();
debugDispatch_initialize();
classTrack_initialize(env);
debugLoop_initialize();
initMonitor = debugMonitorCreate("JDWP Initialization Monitor");
/*
* Initialize transports
*/
arg.isServer = isServer;
arg.error = JDWP_ERROR(NONE);
arg.startCount = 0;
transport_initialize();
(void)bagEnumerateOver(transports, startTransport, &arg);
/*
* Exit with an error only if
* 1) none of the transports was successfully started, and
* 2) the application has not yet started running
*/
if ((arg.error != JDWP_ERROR(NONE)) &&
(arg.startCount == 0) &&
initOnStartup) {
EXIT_ERROR(map2jvmtiError(arg.error), "No transports initialized");
}
eventHandler_initialize(currentSessionID);
signalInitComplete();
transport_waitForConnection();
suspendPolicy = suspendOnInit ? JDWP_SUSPEND_POLICY(ALL)
: JDWP_SUSPEND_POLICY(NONE);
if (triggering_ei == EI_VM_INIT) {
LOG_MISC(("triggering_ei == EI_VM_INIT"));
eventHelper_reportVMInit(env, currentSessionID, thread, suspendPolicy);
} else {
/*
* TO DO: Kludgy way of getting the triggering event to the
* just-attached debugger. It would be nice to make this a little
* cleaner. There is also a race condition where other events
* can get in the queue (from other not-yet-suspended threads)
* before this one does. (Also need to handle allocation error below?)
*/
EventInfo info;
struct bag *initEventBag;
LOG_MISC(("triggering_ei != EI_VM_INIT"));
initEventBag = eventHelper_createEventBag();
(void)memset(&info,0,sizeof(info));
info.ei = triggering_ei;
eventHelper_recordEvent(&info, 0, suspendPolicy, initEventBag);
(void)eventHelper_reportEvents(currentSessionID, initEventBag);
bagDestroyBag(initEventBag);
}
if ( gdata->vmDead ) {
EXIT_ERROR(AGENT_ERROR_INTERNAL,"VM dead before initialize() completes");
}
LOG_MISC(("End initialize()"));
}
/*
* loadTransport() is adapted from loadJVMHelperLib() in
* JDK 1.2 javai.c v1.61
*/
static jdwpError
loadTransport(char *name, jdwpTransportEnv **transportPtr)
{
JNIEnv *env;
jdwpTransport_OnLoad_t onLoad;
void *handle;
char *libdir;
/* Make sure library name is not empty */
if (name == NULL) {
ERROR_MESSAGE(("library name is empty"));
return JDWP_ERROR(TRANSPORT_LOAD);
}
/* First, look in sun.boot.library.path. This should find the standard
* dt_socket and dt_shmem transport libraries, or any library
* that was delivered with the J2SE.
* Note: Since 6819213 fixed, Java property sun.boot.library.path can
* contain multiple paths. Dll_dir is the first entry and
* -Dsun.boot.library.path entries are appended.
*/
libdir = gdata->property_sun_boot_library_path;
if (libdir == NULL) {
ERROR_MESSAGE(("Java property sun.boot.library.path is not set"));
return JDWP_ERROR(TRANSPORT_LOAD);
}
handle = loadTransportLibrary(libdir, name);
if (handle == NULL) {
/* Second, look along the path used by the native dlopen/LoadLibrary
* functions. This should effectively try and load the simple
* library name, which will cause the default system library
* search technique to happen.
* We should only reach here if the transport library wasn't found
* in the J2SE directory, e.g. it's a custom transport library
* not installed in the J2SE like dt_socket and dt_shmem is.
*
* Note: Why not use java.library.path? Several reasons:
* a) This matches existing agentlib search
* b) These are technically not JNI libraries
*/
handle = loadTransportLibrary("", name);
}
/* See if a library was found with this name */
if (handle == NULL) {
ERROR_MESSAGE(("transport library not found: %s", name));
return JDWP_ERROR(TRANSPORT_LOAD);
}
/* Find the onLoad address */
onLoad = findTransportOnLoad(handle);
if (onLoad == NULL) {
ERROR_MESSAGE(("transport library missing onLoad entry: %s", name));
return JDWP_ERROR(TRANSPORT_LOAD);
}
/* Get transport interface */
env = getEnv();
if ( env != NULL ) {
jdwpTransportEnv *t;
JavaVM *jvm;
jint ver;
JNI_FUNC_PTR(env,GetJavaVM)(env, &jvm);
ver = (*onLoad)(jvm, &callback, JDWPTRANSPORT_VERSION_1_0, &t);
if (ver != JNI_OK) {
switch (ver) {
case JNI_ENOMEM :
ERROR_MESSAGE(("insufficient memory to complete initialization"));
break;
case JNI_EVERSION :
ERROR_MESSAGE(("transport doesn't recognize version %x",
JDWPTRANSPORT_VERSION_1_0));
break;
case JNI_EEXIST :
ERROR_MESSAGE(("transport doesn't support multiple environments"));
break;
default:
ERROR_MESSAGE(("unrecognized error %d from transport", ver));
break;
}
return JDWP_ERROR(TRANSPORT_INIT);
}
*transportPtr = t;
} else {
return JDWP_ERROR(TRANSPORT_LOAD);
}
return JDWP_ERROR(NONE);
}
/*
* Determine the component class by looking thru all classes for
* one that has the signature of the component and the same class loadeer
* as the array. See JVM spec 5.3.3:
* If the component type is a reference type, C is marked as having
* been defined by the defining class loader of the component type.
*/
static jdwpError
getComponentClass(JNIEnv *env, jclass arrayClass, char *componentSignature,
jclass *componentClassPtr)
{
jobject arrayClassLoader;
jclass *classes;
jint count;
jclass componentClass = NULL;
jdwpError serror;
jvmtiError error;
serror = JDWP_ERROR(NONE);
error = classLoader(arrayClass, &arrayClassLoader);
if (error != JVMTI_ERROR_NONE) {
return map2jdwpError(error);
}
error = allLoadedClasses(&classes, &count);
if (error != JVMTI_ERROR_NONE) {
serror = map2jdwpError(error);
} else {
int i;
for (i = 0; (i < count) && (componentClass == NULL); i++) {
char *signature = NULL;
jclass clazz = classes[i];
jboolean match;
jvmtiError error;
/* signature must match */
error = classSignature(clazz, &signature, NULL);
if (error != JVMTI_ERROR_NONE) {
serror = map2jdwpError(error);
break;
}
match = strcmp(signature, componentSignature) == 0;
jvmtiDeallocate(signature);
/* if signature matches, get class loader to check if
* it matches
*/
if (match) {
jobject loader;
error = classLoader(clazz, &loader);
if (error != JVMTI_ERROR_NONE) {
return map2jdwpError(error);
}
match = isSameObject(env, loader, arrayClassLoader);
}
if (match) {
componentClass = clazz;
}
}
jvmtiDeallocate(classes);
*componentClassPtr = componentClass;
}
if (serror == JDWP_ERROR(NONE) && componentClass == NULL) {
/* per JVM spec, component class is always loaded
* before array class, so this should never occur.
*/
serror = JDWP_ERROR(NOT_FOUND);
}
return serror;
}
void
inStream_clearError(PacketInputStream *stream) {
stream->error = JDWP_ERROR(NONE);
}
