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4f2c0e9968
This patch adds a custom JS Object type that will convert written properties to their C++ equivalents, reflecting JS writes back to the debugging session. This is better than a simple proxy because printing this custom object works as expected because properties still exist on the object as existing handlers expect.
68 lines
2.3 KiB
C++
68 lines
2.3 KiB
C++
/*
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* Copyright (c) 2021, Matthew Olsson <matthewcolsson@gmail.com>
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* Copyright (c) 2021, Hunter Salyer <thefalsehonesty@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "DebuggerVariableJSObject.h"
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#include "Debugger.h"
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#include <LibJS/Runtime/Error.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/PrimitiveString.h>
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#include <LibJS/Runtime/PropertyName.h>
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namespace HackStudio {
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DebuggerVariableJSObject* DebuggerVariableJSObject::create(DebuggerGlobalJSObject& global_object, const Debug::DebugInfo::VariableInfo& variable_info)
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{
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return global_object.heap().allocate<DebuggerVariableJSObject>(global_object, variable_info, *global_object.object_prototype());
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}
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DebuggerVariableJSObject::DebuggerVariableJSObject(const Debug::DebugInfo::VariableInfo& variable_info, JS::Object& prototype)
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: JS::Object(prototype)
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, m_variable_info(variable_info)
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{
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}
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DebuggerVariableJSObject::~DebuggerVariableJSObject()
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{
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}
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bool DebuggerVariableJSObject::put(const JS::PropertyName& name, JS::Value value, JS::Value receiver)
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{
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if (m_is_writing_properties)
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return JS::Object::put(name, value, receiver);
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if (!name.is_string()) {
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vm().throw_exception<JS::TypeError>(global_object(), String::formatted("Invalid variable name {}", name.to_string()));
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return false;
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}
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auto property_name = name.as_string();
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auto it = m_variable_info.members.find_if([&](auto& variable) {
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return variable->name == property_name;
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});
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if (it.is_end()) {
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vm().throw_exception<JS::TypeError>(global_object(), String::formatted("Variable of type {} has no property {}", m_variable_info.type_name, property_name));
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return false;
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}
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auto& member = **it;
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auto new_value = debugger_object().js_to_debugger(value, member);
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if (!new_value.has_value()) {
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auto string_error = String::formatted("Cannot convert JS value {} to variable {} of type {}", value.to_string_without_side_effects(), name.as_string(), member.type_name);
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vm().throw_exception<JS::TypeError>(global_object(), string_error);
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return false;
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}
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Debugger::the().session()->poke((u32*)member.location_data.address, new_value.value());
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return true;
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}
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DebuggerGlobalJSObject& DebuggerVariableJSObject::debugger_object() const
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{
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return static_cast<DebuggerGlobalJSObject&>(global_object());
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}
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}
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