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AK: Add trivial structure validation to SharedBuffer

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If we're sharing buffers, we only want to share trivial structures
as anything else could potentially share internal pointers, which
most likely is going to cause problems due to different address
spaces.

Fix the GUI::SystemTheme structure, which was not trivial, which
is now caught at compile time.

Fixes #3650
This commit is contained in:
Tom 2020-09-30 20:00:59 -06:00 • committed by Andreas Kling
parent 87f20f704c
commit 7399874479
16 changed files with 48 additions and 29 deletions
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4
Libraries/LibGUI/Clipboard.cpp
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@ -90,7 +90,7 @@ Clipboard::DataAndType Clipboard::data_and_type() const
dbgprintf("GUI::Clipboard::data() clipping contents size is greater than shared buffer size\n");
return {};
}
auto data = ByteBuffer::copy(shared_buffer->data(), response->data_size());
auto data = ByteBuffer::copy(shared_buffer->data<void>(), response->data_size());
auto type = response->mime_type();
auto metadata = response->metadata().entries();
return { data, type, metadata };
@ -104,7 +104,7 @@ void Clipboard::set_data(ReadonlyBytes data, const String& type, const HashMap<S
return;
}
if (!data.is_empty())
memcpy(shared_buffer->data(), data.data(), data.size());
memcpy(shared_buffer->data<void>(), data.data(), data.size());
shared_buffer->seal();
shared_buffer->share_with(connection().server_pid());