DevTools: Move to Userland/DevTools/

Userland/DevTools/Inspector/RemoteProcess.cpp

@@ -0,0 +1,201 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "RemoteProcess.h"
+#include "RemoteObject.h"
+#include "RemoteObjectGraphModel.h"
+#include "RemoteObjectPropertyModel.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+namespace Inspector {
+
+RemoteProcess* s_the;
+
+RemoteProcess& RemoteProcess::the()
+{
+    return *s_the;
+}
+
+RemoteProcess::RemoteProcess(pid_t pid)
+    : m_pid(pid)
+    , m_object_graph_model(RemoteObjectGraphModel::create(*this))
+    , m_socket(Core::LocalSocket::construct())
+{
+    s_the = this;
+    m_socket->set_blocking(true);
+}
+
+void RemoteProcess::handle_identify_response(const JsonObject& response)
+{
+    int pid = response.get("pid").to_int();
+    ASSERT(pid == m_pid);
+
+    m_process_name = response.get("process_name").as_string_or({});
+
+    if (on_update)
+        on_update();
+}
+
+void RemoteProcess::handle_get_all_objects_response(const JsonObject& response)
+{
+    // FIXME: It would be good if we didn't have to make a local copy of the array value here!
+    auto objects = response.get("objects");
+    auto& object_array = objects.as_array();
+
+    NonnullOwnPtrVector<RemoteObject> remote_objects;
+    HashMap<FlatPtr, RemoteObject*> objects_by_address;
+
+    for (auto& value : object_array.values()) {
+        ASSERT(value.is_object());
+        auto& object = value.as_object();
+        auto remote_object = make<RemoteObject>();
+        remote_object->address = object.get("address").to_number<FlatPtr>();
+        remote_object->parent_address = object.get("parent").to_number<FlatPtr>();
+        remote_object->name = object.get("name").to_string();
+        remote_object->class_name = object.get("class_name").to_string();
+        remote_object->json = object;
+        objects_by_address.set(remote_object->address, remote_object);
+        remote_objects.append(move(remote_object));
+    }
+
+    for (size_t i = 0; i < remote_objects.size(); ++i) {
+        auto& remote_object = remote_objects.ptr_at(i);
+        auto* parent = objects_by_address.get(remote_object->parent_address).value_or(nullptr);
+        if (!parent) {
+            m_roots.append(move(remote_object));
+        } else {
+            remote_object->parent = parent;
+            parent->children.append(move(remote_object));
+        }
+    }
+
+    m_object_graph_model->update();
+
+    if (on_update)
+        on_update();
+}
+
+void RemoteProcess::send_request(const JsonObject& request)
+{
+    auto serialized = request.to_string();
+    i32 length = serialized.length();
+    m_socket->write((const u8*)&length, sizeof(length));
+    m_socket->write(serialized);
+}
+
+void RemoteProcess::set_inspected_object(FlatPtr address)
+{
+    JsonObject request;
+    request.set("type", "SetInspectedObject");
+    request.set("address", address);
+    send_request(request);
+}
+
+void RemoteProcess::set_property(FlatPtr object, const StringView& name, const JsonValue& value)
+{
+    JsonObject request;
+    request.set("type", "SetProperty");
+    request.set("address", object);
+    request.set("name", JsonValue(name));
+    request.set("value", value);
+    send_request(request);
+}
+
+void RemoteProcess::update()
+{
+    m_socket->on_connected = [this] {
+        dbgln("Connected to PID {}", m_pid);
+
+        {
+            JsonObject request;
+            request.set("type", "Identify");
+            send_request(request);
+        }
+
+        {
+            JsonObject request;
+            request.set("type", "GetAllObjects");
+            send_request(request);
+        }
+    };
+
+    m_socket->on_ready_to_read = [this] {
+        if (m_socket->eof()) {
+            dbgln("Disconnected from PID {}", m_pid);
+            m_socket->close();
+            return;
+        }
+
+        u32 length;
+        int nread = m_socket->read((u8*)&length, sizeof(length));
+        ASSERT(nread == sizeof(length));
+
+        ByteBuffer data;
+        size_t remaining_bytes = length;
+
+        while (remaining_bytes) {
+            auto packet = m_socket->read(remaining_bytes);
+            if (packet.size() == 0)
+                break;
+            data.append(packet.data(), packet.size());
+            remaining_bytes -= packet.size();
+        }
+
+        ASSERT(data.size() == length);
+        dbgln("Got data size {} and read that many bytes", length);
+
+        auto json_value = JsonValue::from_string(data);
+        ASSERT(json_value.has_value());
+        ASSERT(json_value.value().is_object());
+
+        dbgln("Got JSON response {}", json_value.value());
+
+        auto& response = json_value.value().as_object();
+
+        auto response_type = response.get("type").as_string_or({});
+        if (response_type.is_null())
+            return;
+
+        if (response_type == "GetAllObjects") {
+            handle_get_all_objects_response(response);
+            return;
+        }
+
+        if (response_type == "Identify") {
+            handle_identify_response(response);
+            return;
+        }
+    };
+
+    auto success = m_socket->connect(Core::SocketAddress::local(String::format("/tmp/rpc/%d", m_pid)));
+    if (!success) {
+        warnln("Couldn't connect to PID {}", m_pid);
+        exit(1);
+    }
+}
+
+}