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Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "RemoteProcess.h"
28#include "RemoteObject.h"
29#include "RemoteObjectGraphModel.h"
30#include "RemoteObjectPropertyModel.h"
31#include <stdio.h>
32#include <stdlib.h>
33
34RemoteProcess* s_the;
35
36RemoteProcess& RemoteProcess::the()
37{
38 return *s_the;
39}
40
41RemoteProcess::RemoteProcess(pid_t pid)
42 : m_pid(pid)
43 , m_object_graph_model(RemoteObjectGraphModel::create(*this))
44 , m_socket(Core::LocalSocket::construct())
45{
46 s_the = this;
47 m_socket->set_blocking(true);
48}
49
50void RemoteProcess::handle_identify_response(const JsonObject& response)
51{
52 int pid = response.get("pid").to_int();
53 ASSERT(pid == m_pid);
54
55 m_process_name = response.get("process_name").as_string_or({});
56
57 if (on_update)
58 on_update();
59}
60
61void RemoteProcess::handle_get_all_objects_response(const JsonObject& response)
62{
63 // FIXME: It would be good if we didn't have to make a local copy of the array value here!
64 auto objects = response.get("objects");
65 auto& object_array = objects.as_array();
66
67 NonnullOwnPtrVector<RemoteObject> remote_objects;
68 HashMap<FlatPtr, RemoteObject*> objects_by_address;
69
70 for (auto& value : object_array.values()) {
71 ASSERT(value.is_object());
72 auto& object = value.as_object();
73 auto remote_object = make<RemoteObject>();
74 remote_object->address = object.get("address").to_number<FlatPtr>();
75 remote_object->parent_address = object.get("parent").to_number<FlatPtr>();
76 remote_object->name = object.get("name").to_string();
77 remote_object->class_name = object.get("class_name").to_string();
78 remote_object->json = object;
79 objects_by_address.set(remote_object->address, remote_object);
80 remote_objects.append(move(remote_object));
81 }
82
83 for (size_t i = 0; i < remote_objects.size(); ++i) {
84 auto& remote_object = remote_objects.ptr_at(i);
85 auto* parent = objects_by_address.get(remote_object->parent_address).value_or(nullptr);
86 if (!parent) {
87 m_roots.append(move(remote_object));
88 } else {
89 remote_object->parent = parent;
90 parent->children.append(move(remote_object));
91 }
92 }
93
94 m_object_graph_model->update();
95
96 if (on_update)
97 on_update();
98}
99
100void RemoteProcess::send_request(const JsonObject& request)
101{
102 auto serialized = request.to_string();
103 i32 length = serialized.length();
104 m_socket->write((const u8*)&length, sizeof(length));
105 m_socket->write(serialized);
106}
107
108void RemoteProcess::set_inspected_object(FlatPtr address)
109{
110 JsonObject request;
111 request.set("type", "SetInspectedObject");
112 request.set("address", address);
113 send_request(request);
114}
115
116void RemoteProcess::set_property(FlatPtr object, const StringView& name, const JsonValue& value)
117{
118 JsonObject request;
119 request.set("type", "SetProperty");
120 request.set("address", object);
121 request.set("name", JsonValue(name));
122 request.set("value", value);
123 send_request(request);
124}
125
126void RemoteProcess::update()
127{
128 m_socket->on_connected = [this] {
129 dbg() << "Connected to PID " << m_pid;
130
131 {
132 JsonObject request;
133 request.set("type", "Identify");
134 send_request(request);
135 }
136
137 {
138 JsonObject request;
139 request.set("type", "GetAllObjects");
140 send_request(request);
141 }
142 };
143
144 m_socket->on_ready_to_read = [this] {
145 if (m_socket->eof()) {
146 dbg() << "Disconnected from PID " << m_pid;
147 m_socket->close();
148 return;
149 }
150
151 u32 length;
152 int nread = m_socket->read((u8*)&length, sizeof(length));
153 ASSERT(nread == sizeof(length));
154
155 ByteBuffer data;
156 size_t remaining_bytes = length;
157
158 while (remaining_bytes) {
159 auto packet = m_socket->read(remaining_bytes);
160 if (packet.size() == 0)
161 break;
162 data.append(packet.data(), packet.size());
163 remaining_bytes -= packet.size();
164 }
165
166 ASSERT(data.size() == length);
167 dbg() << "Got data size " << length << " and read that many bytes";
168
169 auto json_value = JsonValue::from_string(data);
170 ASSERT(json_value.is_object());
171
172 dbg() << "Got JSON response " << json_value.to_string();
173
174 auto& response = json_value.as_object();
175
176 auto response_type = response.get("type").as_string_or({});
177 if (response_type.is_null())
178 return;
179
180 if (response_type == "GetAllObjects") {
181 handle_get_all_objects_response(response);
182 return;
183 }
184
185 if (response_type == "Identify") {
186 handle_identify_response(response);
187 return;
188 }
189 };
190
191 auto success = m_socket->connect(Core::SocketAddress::local(String::format("/tmp/rpc.%d", m_pid)));
192 if (!success) {
193 fprintf(stderr, "Couldn't connect to PID %d\n", m_pid);
194 exit(1);
195 }
196}