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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "jdwp/jdwp.h"
#include "base/stringprintf.h"
#include "jdwp/jdwp_priv.h"
namespace art {
namespace JDWP {
Request::Request(const uint8_t* bytes, uint32_t available) : p_(bytes) {
byte_count_ = Read4BE();
end_ = bytes + byte_count_;
CHECK_LE(byte_count_, available);
id_ = Read4BE();
int8_t flags = Read1();
if ((flags & kJDWPFlagReply) != 0) {
LOG(FATAL) << "reply?!";
}
command_set_ = Read1();
command_ = Read1();
}
Request::~Request() {
}
void Request::CheckConsumed() {
if (p_ < end_) {
CHECK(p_ == end_) << "read too few bytes: " << (end_ - p_);
} else if (p_ > end_) {
CHECK(p_ == end_) << "read too many bytes: " << (p_ - end_);
}
}
std::string Request::ReadUtf8String() {
uint32_t length = Read4BE();
std::string s;
s.resize(length);
memcpy(&s[0], p_, length);
p_ += length;
VLOG(jdwp) << " string \"" << s << "\"";
return s;
}
// Helper function: read a variable-width value from the input buffer.
uint64_t Request::ReadValue(size_t width) {
uint64_t value = -1;
switch (width) {
case 1: value = Read1(); break;
case 2: value = Read2BE(); break;
case 4: value = Read4BE(); break;
case 8: value = Read8BE(); break;
default: LOG(FATAL) << width; break;
}
return value;
}
int32_t Request::ReadSigned32(const char* what) {
int32_t value = static_cast<int32_t>(Read4BE());
VLOG(jdwp) << " " << what << " " << value;
return value;
}
uint32_t Request::ReadUnsigned32(const char* what) {
uint32_t value = Read4BE();
VLOG(jdwp) << " " << what << " " << value;
return value;
}
FieldId Request::ReadFieldId() {
FieldId id = Read4BE();
VLOG(jdwp) << " field id " << DescribeField(id);
return id;
}
MethodId Request::ReadMethodId() {
MethodId id = Read4BE();
VLOG(jdwp) << " method id " << DescribeMethod(id);
return id;
}
ObjectId Request::ReadObjectId(const char* specific_kind) {
ObjectId id = Read8BE();
VLOG(jdwp) << StringPrintf(" %s id %#llx", specific_kind, id);
return id;
}
ObjectId Request::ReadArrayId() {
return ReadObjectId("array");
}
ObjectId Request::ReadObjectId() {
return ReadObjectId("object");
}
ObjectId Request::ReadThreadId() {
return ReadObjectId("thread");
}
ObjectId Request::ReadThreadGroupId() {
return ReadObjectId("thread group");
}
RefTypeId Request::ReadRefTypeId() {
RefTypeId id = Read8BE();
VLOG(jdwp) << " ref type id " << DescribeRefTypeId(id);
return id;
}
FrameId Request::ReadFrameId() {
FrameId id = Read8BE();
VLOG(jdwp) << " frame id " << id;
return id;
}
JdwpTag Request::ReadTag() {
return ReadEnum1<JdwpTag>("tag");
}
JdwpTypeTag Request::ReadTypeTag() {
return ReadEnum1<JdwpTypeTag>("type tag");
}
JdwpLocation Request::ReadLocation() {
JdwpLocation location;
memset(&location, 0, sizeof(location)); // Allows memcmp(3) later.
location.type_tag = ReadTypeTag();
location.class_id = ReadObjectId("class");
location.method_id = ReadMethodId();
location.dex_pc = Read8BE();
VLOG(jdwp) << " location " << location;
return location;
}
JdwpModKind Request::ReadModKind() {
return ReadEnum1<JdwpModKind>("mod kind");
}
uint8_t Request::Read1() {
return *p_++;
}
uint16_t Request::Read2BE() {
uint16_t result = p_[0] << 8 | p_[1];
p_ += 2;
return result;
}
uint32_t Request::Read4BE() {
uint32_t result = p_[0] << 24;
result |= p_[1] << 16;
result |= p_[2] << 8;
result |= p_[3];
p_ += 4;
return result;
}
uint64_t Request::Read8BE() {
uint64_t high = Read4BE();
uint64_t low = Read4BE();
return (high << 32) | low;
}
} // namespace JDWP
} // namespace art
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