Bug 123211 – Grow method in ArgumentEncoder.cpp does not return aligned address

• Status: UNCONFIRMED
• Component: WebKit2

From Source\WebKit2\Platform\CoreIPC\ArgumentEncoder.cpp

The grow method attempts to grow the buffer to fit data of a specified size. And the address should be aligned to a specific memory boundary from what i understand. 
However it is not doing so returning a non-aligned address. It just just returning where alignedSize is always a multiple of alignment.

    return m_buffer + alignedSize;

Subsequently it is asserting on the ARM platform with GCC compiler when reinterpret_cast_ptr is called to check on it's alignment of the address been passed in.

[Anders Carlsson]

(In reply to comment #0)
> From Source\WebKit2\Platform\CoreIPC\ArgumentEncoder.cpp
> 
> It just just returning where alignedSize is always a multiple of alignment.

That's the whole point of the grow function.

But should the grow method return an aligned address?