/*
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* Copyright (c) 1998, 2008, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include "util.h"
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#include "stream.h"
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#include "inStream.h"
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#include "transport.h"
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#include "bag.h"
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#include "commonRef.h"
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#include "FrameID.h"
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#define INITIAL_REF_ALLOC 50
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#define SMALLEST(a, b) ((a) < (b)) ? (a) : (b)
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/*
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* TO DO: Support processing of replies through command input streams.
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*/
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void
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inStream_init(PacketInputStream *stream, jdwpPacket packet)
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{
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stream->packet = packet;
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stream->error = JDWP_ERROR(NONE);
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stream->left = packet.type.cmd.len;
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stream->current = packet.type.cmd.data;
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stream->refs = bagCreateBag(sizeof(jobject), INITIAL_REF_ALLOC);
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if (stream->refs == NULL) {
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stream->error = JDWP_ERROR(OUT_OF_MEMORY);
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}
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}
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jint
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inStream_id(PacketInputStream *stream)
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{
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return stream->packet.type.cmd.id;
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}
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jbyte
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inStream_command(PacketInputStream *stream)
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{
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return stream->packet.type.cmd.cmd;
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}
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static jdwpError
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readBytes(PacketInputStream *stream, void *dest, int size)
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{
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if (stream->error) {
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return stream->error;
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}
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if (size > stream->left) {
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stream->error = JDWP_ERROR(INTERNAL);
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return stream->error;
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}
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if (dest) {
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(void)memcpy(dest, stream->current, size);
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}
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stream->current += size;
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stream->left -= size;
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return stream->error;
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}
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jdwpError
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inStream_skipBytes(PacketInputStream *stream, jint size) {
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return readBytes(stream, NULL, size);
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}
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jboolean
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inStream_readBoolean(PacketInputStream *stream)
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{
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jbyte flag = 0;
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(void)readBytes(stream, &flag, sizeof(flag));
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if (stream->error) {
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return 0;
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} else {
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return flag ? JNI_TRUE : JNI_FALSE;
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}
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}
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jbyte
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inStream_readByte(PacketInputStream *stream)
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{
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jbyte val = 0;
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(void)readBytes(stream, &val, sizeof(val));
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return val;
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}
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jbyte *
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inStream_readBytes(PacketInputStream *stream, int length, jbyte *buf)
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{
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(void)readBytes(stream, buf, length);
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return buf;
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}
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jchar
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inStream_readChar(PacketInputStream *stream)
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{
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jchar val = 0;
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(void)readBytes(stream, &val, sizeof(val));
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return JAVA_TO_HOST_CHAR(val);
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}
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jshort
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inStream_readShort(PacketInputStream *stream)
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{
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jshort val = 0;
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(void)readBytes(stream, &val, sizeof(val));
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return JAVA_TO_HOST_SHORT(val);
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}
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jint
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inStream_readInt(PacketInputStream *stream)
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{
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jint val = 0;
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(void)readBytes(stream, &val, sizeof(val));
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return JAVA_TO_HOST_INT(val);
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}
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jlong
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inStream_readLong(PacketInputStream *stream)
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{
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jlong val = 0;
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(void)readBytes(stream, &val, sizeof(val));
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return JAVA_TO_HOST_LONG(val);
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}
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jfloat
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inStream_readFloat(PacketInputStream *stream)
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{
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jfloat val = 0;
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(void)readBytes(stream, &val, sizeof(val));
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return JAVA_TO_HOST_FLOAT(val);
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}
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jdouble
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inStream_readDouble(PacketInputStream *stream)
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{
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jdouble val = 0;
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(void)readBytes(stream, &val, sizeof(val));
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return JAVA_TO_HOST_DOUBLE(val);
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}
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/*
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* Read an object from the stream. The ID used in the wire protocol
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* is converted to a reference which is returned. The reference is
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* global and strong, but it should *not* be deleted by the caller
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* since it is freed when this stream is destroyed.
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*/
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jobject
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inStream_readObjectRef(JNIEnv *env, PacketInputStream *stream)
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{
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jobject ref;
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jobject *refPtr;
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jlong id = inStream_readLong(stream);
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if (stream->error) {
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return NULL;
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}
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if (id == NULL_OBJECT_ID) {
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return NULL;
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}
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ref = commonRef_idToRef(env, id);
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if (ref == NULL) {
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stream->error = JDWP_ERROR(INVALID_OBJECT);
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return NULL;
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}
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refPtr = bagAdd(stream->refs);
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if (refPtr == NULL) {
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commonRef_idToRef_delete(env, ref);
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return NULL;
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}
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*refPtr = ref;
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return ref;
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}
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/*
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* Read a raw object id from the stream. This should be used rarely.
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* Normally, inStream_readObjectRef is preferred since it takes care
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* of reference conversion and tracking. Only code that needs to
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* perform maintence of the commonRef hash table uses this function.
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*/
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jlong
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inStream_readObjectID(PacketInputStream *stream)
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{
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return inStream_readLong(stream);
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}
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jclass
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inStream_readClassRef(JNIEnv *env, PacketInputStream *stream)
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{
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jobject object = inStream_readObjectRef(env, stream);
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if (object == NULL) {
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/*
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* Could be error or just the null reference. In either case,
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* stop now.
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*/
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return NULL;
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}
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if (!isClass(object)) {
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stream->error = JDWP_ERROR(INVALID_CLASS);
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return NULL;
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}
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return object;
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}
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jthread
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inStream_readThreadRef(JNIEnv *env, PacketInputStream *stream)
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{
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jobject object = inStream_readObjectRef(env, stream);
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if (object == NULL) {
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/*
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* Could be error or just the null reference. In either case,
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* stop now.
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*/
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return NULL;
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}
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if (!isThread(object)) {
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stream->error = JDWP_ERROR(INVALID_THREAD);
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return NULL;
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}
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return object;
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}
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jthreadGroup
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inStream_readThreadGroupRef(JNIEnv *env, PacketInputStream *stream)
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{
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jobject object = inStream_readObjectRef(env, stream);
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if (object == NULL) {
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/*
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* Could be error or just the null reference. In either case,
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* stop now.
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*/
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return NULL;
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}
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if (!isThreadGroup(object)) {
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stream->error = JDWP_ERROR(INVALID_THREAD_GROUP);
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return NULL;
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}
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return object;
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}
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jstring
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inStream_readStringRef(JNIEnv *env, PacketInputStream *stream)
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{
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jobject object = inStream_readObjectRef(env, stream);
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if (object == NULL) {
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/*
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* Could be error or just the null reference. In either case,
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* stop now.
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*/
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return NULL;
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}
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if (!isString(object)) {
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stream->error = JDWP_ERROR(INVALID_STRING);
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return NULL;
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}
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return object;
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}
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jclass
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inStream_readClassLoaderRef(JNIEnv *env, PacketInputStream *stream)
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{
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jobject object = inStream_readObjectRef(env, stream);
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if (object == NULL) {
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/*
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* Could be error or just the null reference. In either case,
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* stop now.
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*/
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return NULL;
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}
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if (!isClassLoader(object)) {
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stream->error = JDWP_ERROR(INVALID_CLASS_LOADER);
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return NULL;
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}
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return object;
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}
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jarray
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inStream_readArrayRef(JNIEnv *env, PacketInputStream *stream)
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{
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jobject object = inStream_readObjectRef(env, stream);
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if (object == NULL) {
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/*
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* Could be error or just the null reference. In either case,
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* stop now.
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*/
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return NULL;
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}
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if (!isArray(object)) {
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stream->error = JDWP_ERROR(INVALID_ARRAY);
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return NULL;
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}
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return object;
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}
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/*
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* Next 3 functions read an Int and convert to a Pointer!?
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* If sizeof(jxxxID) == 8 we must read these values as Longs.
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*/
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FrameID
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inStream_readFrameID(PacketInputStream *stream)
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{
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if (sizeof(FrameID) == 8) {
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/*LINTED*/
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return (FrameID)inStream_readLong(stream);
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} else {
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/*LINTED*/
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return (FrameID)inStream_readInt(stream);
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}
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}
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jmethodID
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inStream_readMethodID(PacketInputStream *stream)
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{
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if (sizeof(jmethodID) == 8) {
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/*LINTED*/
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return (jmethodID)(intptr_t)inStream_readLong(stream);
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} else {
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/*LINTED*/
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return (jmethodID)(intptr_t)inStream_readInt(stream);
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}
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}
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jfieldID
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inStream_readFieldID(PacketInputStream *stream)
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{
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if (sizeof(jfieldID) == 8) {
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/*LINTED*/
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return (jfieldID)(intptr_t)inStream_readLong(stream);
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} else {
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/*LINTED*/
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return (jfieldID)(intptr_t)inStream_readInt(stream);
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}
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}
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jlocation
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inStream_readLocation(PacketInputStream *stream)
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{
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return (jlocation)inStream_readLong(stream);
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}
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char *
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inStream_readString(PacketInputStream *stream)
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{
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int length;
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char *string;
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length = inStream_readInt(stream);
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string = jvmtiAllocate(length + 1);
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if (string != NULL) {
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int new_length;
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(void)readBytes(stream, string, length);
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string[length] = '\0';
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/* This is Standard UTF-8, convert to Modified UTF-8 if necessary */
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new_length = (gdata->npt->utf8sToUtf8mLength)
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(gdata->npt->utf, (jbyte*)string, length);
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if ( new_length != length ) {
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char *new_string;
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new_string = jvmtiAllocate(new_length+1);
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(gdata->npt->utf8sToUtf8m)
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(gdata->npt->utf, (jbyte*)string, length,
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(jbyte*)new_string, new_length);
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jvmtiDeallocate(string);
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return new_string;
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}
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}
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return string;
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}
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jboolean
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inStream_endOfInput(PacketInputStream *stream)
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{
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return (stream->left > 0);
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}
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jdwpError
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inStream_error(PacketInputStream *stream)
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{
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return stream->error;
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}
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void
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inStream_clearError(PacketInputStream *stream) {
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stream->error = JDWP_ERROR(NONE);
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}
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jvalue
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inStream_readValue(PacketInputStream *stream, jbyte *typeKeyPtr)
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{
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jvalue value;
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jbyte typeKey = inStream_readByte(stream);
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if (stream->error) {
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value.j = 0L;
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return value;
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}
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if (isObjectTag(typeKey)) {
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value.l = inStream_readObjectRef(getEnv(), stream);
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} else {
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switch (typeKey) {
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case JDWP_TAG(BYTE):
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value.b = inStream_readByte(stream);
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break;
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case JDWP_TAG(CHAR):
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value.c = inStream_readChar(stream);
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break;
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case JDWP_TAG(FLOAT):
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value.f = inStream_readFloat(stream);
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break;
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case JDWP_TAG(DOUBLE):
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value.d = inStream_readDouble(stream);
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break;
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case JDWP_TAG(INT):
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value.i = inStream_readInt(stream);
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break;
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case JDWP_TAG(LONG):
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value.j = inStream_readLong(stream);
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break;
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case JDWP_TAG(SHORT):
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value.s = inStream_readShort(stream);
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break;
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case JDWP_TAG(BOOLEAN):
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value.z = inStream_readBoolean(stream);
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break;
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default:
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stream->error = JDWP_ERROR(INVALID_TAG);
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break;
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}
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}
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if (typeKeyPtr) {
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*typeKeyPtr = typeKey;
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}
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return value;
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}
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static jboolean
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deleteRef(void *elementPtr, void *arg)
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{
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JNIEnv *env = arg;
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jobject *refPtr = elementPtr;
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commonRef_idToRef_delete(env, *refPtr);
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return JNI_TRUE;
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}
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void
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inStream_destroy(PacketInputStream *stream)
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{
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if (stream->packet.type.cmd.data != NULL) {
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jvmtiDeallocate(stream->packet.type.cmd.data);
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}
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(void)bagEnumerateOver(stream->refs, deleteRef, (void *)getEnv());
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bagDestroyBag(stream->refs);
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}
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