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LibWeb: Fix setTimeout() when there's no active script

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Implements https://github.com/whatwg/html/pull/9712
Fixes https://github.com/SerenityOS/serenity/issues/20970
This commit is contained in:
Luke Wilde 2023-09-12 23:14:38 +01:00 • committed by Andreas Kling
parent 9335524f15
commit 56f0b10d14
4 changed files with 44 additions and 28 deletions
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1
Tests/LibWeb/Text/expected/set-timeout-with-no-active-script.txt Normal file
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@ -0,0 +1 @@
didn't crash!

9
Tests/LibWeb/Text/input/set-timeout-with-no-active-script.html Normal file
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@ -0,0 +1,9 @@
<script src="include.js"></script>
<script>
test(() => {
queueMicrotask(setTimeout.bind(this, () => {}));
queueMicrotask(() => {
println("didn't crash!");
});
});
</script>

60
Userland/Libraries/LibWeb/HTML/WindowOrWorkerGlobalScope.cpp
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@ -19,6 +19,7 @@
#include <LibWeb/HTML/Scripting/ClassicScript.h>
#include <LibWeb/HTML/Scripting/Environments.h>
#include <LibWeb/HTML/Scripting/ExceptionReporter.h>
#include <LibWeb/HTML/Scripting/Fetching.h>
#include <LibWeb/HTML/StructuredSerialize.h>
#include <LibWeb/HTML/Timer.h>
#include <LibWeb/HTML/Window.h>
@ -192,7 +193,8 @@ void WindowOrWorkerGlobalScopeMixin::clear_interval(i32 id)
}
// https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#timer-initialisation-steps
i32 WindowOrWorkerGlobalScopeMixin::run_timer_initialization_steps(TimerHandler handler, i32 timeout, JS::MarkedVector<JS::Value> arguments, Repeat repeat, Optional<i32> previous_id, Optional<AK::URL> base_url)
// With no active script fix from https://github.com/whatwg/html/pull/9712
i32 WindowOrWorkerGlobalScopeMixin::run_timer_initialization_steps(TimerHandler handler, i32 timeout, JS::MarkedVector<JS::Value> arguments, Repeat repeat, Optional<i32> previous_id)
{
// 1. Let thisArg be global if that is a WorkerGlobalScope object; otherwise let thisArg be the WindowProxy that corresponds to global.
@ -210,22 +212,11 @@ i32 WindowOrWorkerGlobalScopeMixin::run_timer_initialization_steps(TimerHandler
// 6. Let callerRealm be the current Realm Record, and calleeRealm be global's relevant Realm.
// FIXME: Implement this when step 9.3.2 is implemented.
// FIXME: The active script becomes null on repeated setInterval callbacks. In JS::VM::get_active_script_or_module,
// the execution context stack is empty on the repeated invocations, thus it returns null. We will need
// to figure out why it becomes empty. But all we need from the active script is the base URL, so we
// grab it on the first invocation an reuse it on repeated invocations.
if (!base_url.has_value()) {
// 7. Let initiating script be the active script.
auto const* initiating_script = Web::Bindings::active_script();
// 7. Let initiating script be the active script.
auto const* initiating_script = Web::Bindings::active_script();
// 8. Assert: initiating script is not null, since this algorithm is always called from some script.
VERIFY(initiating_script);
base_url = initiating_script->base_url();
}
// 9. Let task be a task that runs the following substeps:
JS::SafeFunction<void()> task = [this, handler = move(handler), timeout, arguments = move(arguments), repeat, id, base_url = move(base_url)]() mutable {
// 8. Let task be a task that runs the following substeps:
JS::SafeFunction<void()> task = [this, handler = move(handler), timeout, arguments = move(arguments), repeat, id, initiating_script]() mutable {
// 1. If id does not exist in global's map of active timers, then abort these steps.
if (!m_timers.contains(id))
return;
@ -244,13 +235,28 @@ i32 WindowOrWorkerGlobalScopeMixin::run_timer_initialization_steps(TimerHandler
// 3. Let settings object be global's relevant settings object.
auto& settings_object = relevant_settings_object(this_impl());
// 4. Let base URL be initiating script's base URL.
// 5. Assert: base URL is not null, as initiating script is a classic script or a JavaScript module script.
VERIFY(base_url.has_value());
// 4. Let fetch options be the default classic script fetch options.
ScriptFetchOptions options {};
// 5. Let base URL be settings object's API base URL.
auto base_url = settings_object.api_base_url();
// 6. If initiating script is not null, then:
if (initiating_script) {
// FIXME: 1. Set fetch options to a script fetch options whose cryptographic nonce is initiating script's fetch options's cryptographic nonce,
// integrity metadata is the empty string, parser metadata is "not-parser-inserted", credentials mode is initiating script's fetch
// options's credentials mode, referrer policy is initiating script's fetch options's referrer policy, and fetch priority is "auto".
// 2. Set base URL to initiating script's base URL.
base_url = initiating_script->base_url();
// Spec Note: The effect of these steps ensures that the string compilation done by setTimeout() and setInterval() behaves equivalently to that
// done by eval(). That is, module script fetches via import() will behave the same in both contexts.
}
// 6. Let fetch options be a script fetch options whose cryptographic nonce is initiating script's fetch options's cryptographic nonce, integrity metadata is the empty string, parser metadata is "not-parser-inserted", credentials mode is initiating script's fetch options's credentials mode, and referrer policy is initiating script's fetch options's referrer policy.
// 7. Let script be the result of creating a classic script given handler, settings object, base URL, and fetch options.
auto script = ClassicScript::create(base_url->basename(), source, settings_object, *base_url);
// FIXME: Pass fetch options.
auto script = ClassicScript::create(base_url.basename(), source, settings_object, move(base_url));
// 8. Run the classic script script.
(void)script->run();
@ -263,7 +269,7 @@ i32 WindowOrWorkerGlobalScopeMixin::run_timer_initialization_steps(TimerHandler
switch (repeat) {
// 5. If repeat is true, then perform the timer initialization steps again, given global, handler, timeout, arguments, true, and id.
case Repeat::Yes:
run_timer_initialization_steps(handler, timeout, move(arguments), repeat, id, move(base_url));
run_timer_initialization_steps(handler, timeout, move(arguments), repeat, id);
break;
// 6. Otherwise, remove global's map of active timers[id].
@ -273,20 +279,20 @@ i32 WindowOrWorkerGlobalScopeMixin::run_timer_initialization_steps(TimerHandler
}
};
// FIXME: 10. Increment nesting level by one.
// FIXME: 11. Set task's timer nesting level to nesting level.
// FIXME: 9. Increment nesting level by one.
// FIXME: 10. Set task's timer nesting level to nesting level.
// 12. Let completionStep be an algorithm step which queues a global task on the timer task source given global to run task.
// 11. Let completionStep be an algorithm step which queues a global task on the timer task source given global to run task.
JS::SafeFunction<void()> completion_step = [this, task = move(task)]() mutable {
queue_global_task(Task::Source::TimerTask, this_impl(), move(task));
};
// 13. Run steps after a timeout given global, "setTimeout/setInterval", timeout, completionStep, and id.
// 12. Run steps after a timeout given global, "setTimeout/setInterval", timeout, completionStep, and id.
auto timer = Timer::create(this_impl(), timeout, move(completion_step), id);
m_timers.set(id, timer);
timer->start();
// 14. Return id.
// 13. Return id.
return id;
}

2
Userland/Libraries/LibWeb/HTML/WindowOrWorkerGlobalScope.h
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@ -69,7 +69,7 @@ private:
Yes,
No,
};
i32 run_timer_initialization_steps(TimerHandler handler, i32 timeout, JS::MarkedVector<JS::Value> arguments, Repeat repeat, Optional<i32> previous_id = {}, Optional<AK::URL> base_url = {});
i32 run_timer_initialization_steps(TimerHandler handler, i32 timeout, JS::MarkedVector<JS::Value> arguments, Repeat repeat, Optional<i32> previous_id = {});
IDAllocator m_timer_id_allocator;
HashMap<int, JS::NonnullGCPtr<Timer>> m_timers;