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LibJS/Bytecode: Display local variable names in bytecode dumps

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Instead of displaying locals as "locN", we now show them as "name~N".
This makes it a lot easier to follow bytecode dumps, especially in
longer functions.

Note that we keep displaying the local index, to avoid confusion in case
there are multiple separate locals with the same name in one executable.
This commit is contained in:
Andreas Kling
2024-06-13 21:19:06 +02:00
committed by Andreas Kling
parent 88d134a4da
commit 0aa8cb7dac
4 changed files with 16 additions and 9 deletions
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9
Userland/Libraries/LibJS/Bytecode/Interpreter.cpp
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@@ -53,8 +53,7 @@ static ByteString format_operand(StringView name, Operand operand, Bytecode::Exe
}
break;
case Operand::Type::Local:
// FIXME: Show local name.
builder.appendff("\033[34mloc{}\033[0m", operand.index());
builder.appendff("\033[34m{}~{}\033[0m", executable.local_variable_names[operand.index() - executable.local_index_base], operand.index() - executable.local_index_base);
break;
case Operand::Type::Constant: {
builder.append("\033[36m"sv);
@@ -708,9 +707,9 @@ Interpreter::ResultAndReturnRegister Interpreter::run_executable(Executable& exe
VERIFY(!vm().execution_context_stack().is_empty());
auto& running_execution_context = vm().running_execution_context();
u32 registers_and_contants_count = executable.number_of_registers + executable.constants.size();
if (running_execution_context.registers_and_constants_and_locals.size() < registers_and_contants_count)
running_execution_context.registers_and_constants_and_locals.resize(registers_and_contants_count);
u32 registers_and_constants_and_locals_count = executable.number_of_registers + executable.constants.size() + executable.local_variable_names.size();
if (running_execution_context.registers_and_constants_and_locals.size() < registers_and_constants_and_locals_count)
running_execution_context.registers_and_constants_and_locals.resize(registers_and_constants_and_locals_count);
TemporaryChange restore_running_execution_context { m_running_execution_context, &running_execution_context };
TemporaryChange restore_arguments { m_arguments, running_execution_context.arguments.span() };