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LibJS: Add ScriptOrModule to execution context and track it everywhere

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davidot 2022-01-17 14:48:22 +01:00 • committed by Linus Groh
parent 99edf5b25a
commit 57c5a59cab
10 changed files with 42 additions and 6 deletions
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19
Userland/Libraries/LibJS/Runtime/VM.cpp
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@ -663,4 +663,23 @@ void VM::restore_execution_context_stack()
m_execution_context_stack = m_saved_execution_context_stacks.take_last();
}
// 9.4.1 GetActiveScriptOrModule ( ), https://tc39.es/ecma262/#sec-getactivescriptormodule
ScriptOrModule VM::get_active_script_or_module() const
{
// 1. If the execution context stack is empty, return null.
if (m_execution_context_stack.is_empty())
return Empty {};
// 2. Let ec be the topmost execution context on the execution context stack whose ScriptOrModule component is not null.
for (auto i = m_execution_context_stack.size() - 1; i > 0; i--) {
if (!m_execution_context_stack[i]->script_or_module.has<Empty>())
return m_execution_context_stack[i]->script_or_module;
}
// 3. If no such execution context exists, return null. Otherwise, return ec's ScriptOrModule.
// Note: Since it is not empty we have 0 and since we got here all the
// above contexts don't have a non-null ScriptOrModule
return m_execution_context_stack[0]->script_or_module;
}
}