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velzieandClaude Opus 5.5 db8dafc317 native, browser: a jump out of a callback to the guest frame below closes its call-out
A guest call from native Wine that names no argument bytes counted as
left only with the stack more than NATIVE_UNWOUND (512 bytes) above its
frame, and gexrt64 asked gex to leave it (NATIVE_LEFT) only past the
same margin. A jump out of the callback to the guest frame that called
the native function lands closer than that when the native frames
between are small, so each such jump held one more call-out open: the
page's host stack ran out within 3000 jumps, and natively the call-outs
nested hundreds deep.

A call-out whose stack the TEB names (callout_stack_top) is now left by
any stack pointer above its frame on that stack, on both hosts, and
gexrt64 asks at any such entry (Wine pin). The return to the pad still
matches within NATIVE_UNWOUND. cbthrow passes on the page as well;
100000 jumps natively and on the page keep at most a few call-outs open.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_853378b774d645b4ac78b16d9af91a31
2026-11-13 07:50:36 -05:00
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