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LibJS/Bytecode: Simplify Bytecode::Interpreter lifetime model

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The JS::VM now owns the one Bytecode::Interpreter. We no longer have
multiple bytecode interpreters, and there is no concept of a "current"
bytecode interpreter.

If you ask for VM::bytecode_interpreter_if_exists(), it will return null
if we're not running the program in "bytecode enabled" mode.

If you ask for VM::bytecode_interpreter(), it will return a bytecode
interpreter in all modes. This is used for situations where even the AST
interpreter switches to bytecode mode (generators, etc.)
This commit is contained in:
Andreas Kling 2023-06-22 15:59:18 +02:00
parent 6150960671
commit 6537ed8fff
15 changed files with 117 additions and 106 deletions
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17
Userland/Libraries/LibJS/Runtime/VM.cpp
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@ -14,6 +14,7 @@
#include <AK/StringBuilder.h>
#include <LibFileSystem/FileSystem.h>
#include <LibJS/AST.h>
#include <LibJS/Bytecode/Interpreter.h>
#include <LibJS/Interpreter.h>
#include <LibJS/Runtime/AbstractOperations.h>
#include <LibJS/Runtime/Array.h>
@ -65,6 +66,8 @@ VM::VM(OwnPtr<CustomData> custom_data, ErrorMessages error_messages)
, m_error_messages(move(error_messages))
, m_custom_data(move(custom_data))
{
m_bytecode_interpreter = make<Bytecode::Interpreter>(*this);
m_empty_string = m_heap.allocate_without_realm<PrimitiveString>(String {});
for (size_t i = 0; i < single_ascii_character_strings.size(); ++i)
@ -166,6 +169,8 @@ VM::VM(OwnPtr<CustomData> custom_data, ErrorMessages error_messages)
};
}
VM::~VM() = default;
String const& VM::error_message(ErrorMessage type) const
{
VERIFY(type < ErrorMessage::__Count);
@ -196,6 +201,18 @@ Interpreter* VM::interpreter_if_exists()
return m_interpreters.last();
}
Bytecode::Interpreter& VM::bytecode_interpreter()
{
return *m_bytecode_interpreter;
}
Bytecode::Interpreter* VM::bytecode_interpreter_if_exists()
{
if (!Bytecode::Interpreter::enabled())
return nullptr;
return m_bytecode_interpreter;
}
void VM::push_interpreter(Interpreter& interpreter)
{
m_interpreters.append(&interpreter);