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LibWeb: Set module map entry before invoking callbacks

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This patch fixes the value of a module map entry being wrong in the
callbacks invoked in the set call. Previously we would set the value
in only after invoking the callbacks, leading to crashes when a
callback implementation would rightfully assume the value to be set
already.

Resolves #20994
This commit is contained in:
networkException 2023-10-25 12:39:01 +02:00 • committed by Andreas Kling
commit 0388766531
Notes: sideshowbarker 2024-07-16 23:23:26 +09:00
1 changed files with 4 additions and 2 deletions
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6
Userland/Libraries/LibWeb/HTML/Scripting/ModuleMap.cpp
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@ -1,5 +1,5 @@
/* /*
* Copyright (c) 2022, networkException <networkexception@serenityos.org> * Copyright (c) 2022-2023, networkException <networkexception@serenityos.org>
* *
* SPDX-License-Identifier: BSD-2-Clause * SPDX-License-Identifier: BSD-2-Clause
*/ */
@ -42,12 +42,14 @@ Optional<ModuleMap::Entry> ModuleMap::get(AK::URL const& url, DeprecatedString c
AK::HashSetResult ModuleMap::set(AK::URL const& url, DeprecatedString const& type, Entry entry) AK::HashSetResult ModuleMap::set(AK::URL const& url, DeprecatedString const& type, Entry entry)
{ {
auto value = m_values.set({ url, type }, entry);
auto callbacks = m_callbacks.get({ url, type }); auto callbacks = m_callbacks.get({ url, type });
if (callbacks.has_value()) if (callbacks.has_value())
for (auto const& callback : *callbacks) for (auto const& callback : *callbacks)
callback(entry); callback(entry);
return m_values.set({ url, type }, entry); return value;
} }
void ModuleMap::wait_for_change(AK::URL const& url, DeprecatedString const& type, Function<void(Entry)> callback) void ModuleMap::wait_for_change(AK::URL const& url, DeprecatedString const& type, Function<void(Entry)> callback)