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Keep the stack guard out of localized library archives

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The stack guard was a tentative definition, which some targets emit as a
common symbol. Localized library archives deliberately leave common
symbols shared, so on macOS the archive defined scr_stack_guard alongside
its declared exports. An explicit initializer makes it an ordinary
definition that localization hides like the rest of the runtime.
This commit is contained in:
Chris Tate
2026-10-09 17:40:54 -05:00
parent d1e7f9088c
commit bee2981308
1 changed files with 4 additions and 2 deletions
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packages/runtime/src/scr_exception.c
+4 -2
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@@ -56,8 +56,10 @@ ScrExcCell *scr_exc_active = &scr_main_exc;
/* The running stack's overflow guard (scr_runtime.h). It lives beside the
* exception cell so fiber switching can maintain it whenever scr_async.c is
* linked; scr_context.c installs it per thread. */
SCR_TL uintptr_t scr_stack_guard;
* linked; scr_context.c installs it per thread. The explicit initializer
* keeps it an ordinary definition rather than a common symbol, which a
* localized library archive would otherwise leave shared. */
SCR_TL uintptr_t scr_stack_guard = 0;
/* Fiber switching (scr_async.c) points the exception machinery at the
* incoming fiber's cell; returns the previous cell. */