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/*
* Copyright (c) 2021, Hunter Salyer <thefalsehonesty@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "DebuggerGlobalJSObject.h"
#include "Debugger.h"
#include "DebuggerVariableJSObject.h"
#include <LibJS/Runtime/Completion.h>
#include <LibJS/Runtime/Object.h>
#include <LibJS/Runtime/ProxyObject.h>
namespace HackStudio {
DebuggerGlobalJSObject::DebuggerGlobalJSObject()
{
auto regs = Debugger::the().session()->get_registers();
auto lib = Debugger::the().session()->library_at(regs.ip());
if (!lib)
return;
m_variables = lib->debug_info->get_variables_in_current_scope(regs);
}
JS::ThrowCompletionOr<JS::Value> DebuggerGlobalJSObject::internal_get(JS::PropertyKey const& property_name, JS::Value receiver) const
{
if (m_variables.is_empty() || !property_name.is_string())
return Base::internal_get(property_name, receiver);
auto it = m_variables.find_if([&](auto& variable) {
return variable->name == property_name.as_string();
});
if (it.is_end())
return Base::internal_get(property_name, receiver);
auto& target_variable = **it;
auto js_value = debugger_to_js(target_variable);
if (js_value.has_value())
return js_value.value();
auto error_string = String::formatted("Variable {} of type {} is not convertible to a JS Value", property_name.as_string(), target_variable.type_name);
return vm().throw_completion<JS::TypeError>(const_cast<DebuggerGlobalJSObject&>(*this), move(error_string));
}
JS::ThrowCompletionOr<bool> DebuggerGlobalJSObject::internal_set(JS::PropertyKey const& property_name, JS::Value value, JS::Value receiver)
{
if (m_variables.is_empty() || !property_name.is_string())
return Base::internal_set(property_name, value, receiver);
auto it = m_variables.find_if([&](auto& variable) {
return variable->name == property_name.as_string();
});
if (it.is_end())
return Base::internal_set(property_name, value, receiver);
auto& target_variable = **it;
auto debugger_value = js_to_debugger(value, target_variable);
if (debugger_value.has_value())
return Debugger::the().session()->poke((u32*)target_variable.location_data.address, debugger_value.value());
auto error_string = String::formatted("Cannot convert JS value {} to variable {} of type {}", value.to_string_without_side_effects(), property_name.as_string(), target_variable.type_name);
return vm().throw_completion<JS::TypeError>(const_cast<DebuggerGlobalJSObject&>(*this), move(error_string));
}
Optional<JS::Value> DebuggerGlobalJSObject::debugger_to_js(const Debug::DebugInfo::VariableInfo& variable) const
{
if (variable.location_type != Debug::DebugInfo::VariableInfo::LocationType::Address)
return {};
auto variable_address = variable.location_data.address;
if (variable.is_enum_type() || variable.type_name == "int") {
auto value = Debugger::the().session()->peek((u32*)variable_address);
VERIFY(value.has_value());
return JS::Value((i32)value.value());
}
if (variable.type_name == "char") {
auto value = Debugger::the().session()->peek((u32*)variable_address);
VERIFY(value.has_value());
return JS::Value((char)value.value());
}
if (variable.type_name == "bool") {
auto value = Debugger::the().session()->peek((u32*)variable_address);
VERIFY(value.has_value());
return JS::Value(value.value() != 0);
}
auto* object = DebuggerVariableJSObject::create(const_cast<DebuggerGlobalJSObject&>(*this), variable);
for (auto& member : variable.members) {
auto member_value = debugger_to_js(member);
if (!member_value.has_value())
continue;
object->define_direct_property(member.name, member_value.value(), JS::default_attributes);
}
return JS::Value(object);
}
Optional<u32> DebuggerGlobalJSObject::js_to_debugger(JS::Value value, const Debug::DebugInfo::VariableInfo& variable) const
{
if (value.is_string() && variable.type_name == "char") {
auto string = value.as_string().string();
if (string.length() != 1)
return {};
return string[0];
}
if (value.is_number() && (variable.is_enum_type() || variable.type_name == "int"))
return value.as_u32();
if (value.is_boolean() && variable.type_name == "bool")
return value.as_bool();
return {};
}
}
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