mirror of
https://github.com/RGBCube/serenity
synced 2025-05-15 05:54:59 +00:00
1d8ec677a3
We can now stay in machine code for environment variable read accesses as long as they are cached and initialized. 20% speed-up on Octane/zlib.js :^)
68 lines
2.4 KiB
C++
68 lines
2.4 KiB
C++
/*
|
|
* Copyright (c) 2020-2021, Andreas Kling <kling@serenityos.org>
|
|
* Copyright (c) 2020-2021, Linus Groh <linusg@serenityos.org>
|
|
* Copyright (c) 2022, Luke Wilde <lukew@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/DeprecatedFlyString.h>
|
|
#include <AK/WeakPtr.h>
|
|
#include <LibJS/Bytecode/Instruction.h>
|
|
#include <LibJS/Forward.h>
|
|
#include <LibJS/Heap/MarkedVector.h>
|
|
#include <LibJS/Module.h>
|
|
#include <LibJS/Runtime/PrivateEnvironment.h>
|
|
#include <LibJS/Runtime/Value.h>
|
|
#include <LibJS/SourceRange.h>
|
|
|
|
namespace JS {
|
|
|
|
using ScriptOrModule = Variant<Empty, NonnullGCPtr<Script>, NonnullGCPtr<Module>>;
|
|
|
|
// 9.4 Execution Contexts, https://tc39.es/ecma262/#sec-execution-contexts
|
|
struct ExecutionContext {
|
|
explicit ExecutionContext(Heap& heap);
|
|
|
|
[[nodiscard]] ExecutionContext copy() const;
|
|
|
|
void visit_edges(Cell::Visitor&);
|
|
|
|
static FlatPtr lexical_environment_offset() { return OFFSET_OF(ExecutionContext, lexical_environment); }
|
|
|
|
private:
|
|
explicit ExecutionContext(MarkedVector<Value> existing_arguments, MarkedVector<Value> existing_local_variables);
|
|
|
|
public:
|
|
GCPtr<FunctionObject> function; // [[Function]]
|
|
GCPtr<Realm> realm; // [[Realm]]
|
|
ScriptOrModule script_or_module; // [[ScriptOrModule]]
|
|
GCPtr<Environment> lexical_environment; // [[LexicalEnvironment]]
|
|
GCPtr<Environment> variable_environment; // [[VariableEnvironment]]
|
|
GCPtr<PrivateEnvironment> private_environment; // [[PrivateEnvironment]]
|
|
|
|
// Non-standard: This points at something that owns this ExecutionContext, in case it needs to be protected from GC.
|
|
GCPtr<Cell> context_owner;
|
|
|
|
Optional<Bytecode::InstructionStreamIterator> instruction_stream_iterator;
|
|
DeprecatedFlyString function_name;
|
|
Value this_value;
|
|
MarkedVector<Value> arguments;
|
|
MarkedVector<Value> local_variables;
|
|
bool is_strict_mode { false };
|
|
|
|
RefPtr<Bytecode::Executable> executable;
|
|
|
|
// https://html.spec.whatwg.org/multipage/webappapis.html#skip-when-determining-incumbent-counter
|
|
// FIXME: Move this out of LibJS (e.g. by using the CustomData concept), as it's used exclusively by LibWeb.
|
|
size_t skip_when_determining_incumbent_counter { 0 };
|
|
};
|
|
|
|
struct StackTraceElement {
|
|
ExecutionContext* execution_context;
|
|
Optional<UnrealizedSourceRange> source_range;
|
|
};
|
|
|
|
}
|