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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Crash in JavaScriptCore GC when using JSC on dispatch queues (thread_get_state returns NULL stack pointer)"
href="https://bugs.webkit.org/show_bug.cgi?id=160337#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Crash in JavaScriptCore GC when using JSC on dispatch queues (thread_get_state returns NULL stack pointer)"
href="https://bugs.webkit.org/show_bug.cgi?id=160337">bug 160337</a>
from <span class="vcard"><a class="email" href="mailto:nham@fb.com" title="Ben Nham <nham@fb.com>"> <span class="fn">Ben Nham</span></a>
</span></b>
<pre>Core OS wrote back in <rdar://27607384>:
Can you guys use thread_get_register_pointer_values() as an alternative?
This seems like it would fix the issue because thread_get_register_pointer_values appears to be a wrapper function around thread_get_state that a) filters out any pointers pointing to the null page and b) properly takes into account the red zone beneath the stack pointer.</pre>
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