lookup throw only once

cole-h · edolstra · cole-h · commit 91883ede2096 · 2026-02-05T09:46:42.000-08:00
Co-authored-by: Eelco Dolstra &lt;edolstra@gmail.com&gt;
diff --git a/src/libmain/shared.cc b/src/libmain/shared.cc
@@ -419,6 +419,6 @@ void __cxa_throw(void * exc, void * tinfo_, void (*dest)(void *))
     if (*tinfo == typeid(std::logic_error))
         abort();
 
-    auto orig_cxa_throw = (cxa_throw_type) dlsym(RTLD_NEXT, "__cxa_throw");
+    static auto orig_cxa_throw = (cxa_throw_type) dlsym(RTLD_NEXT, "__cxa_throw");
     orig_cxa_throw(exc, tinfo_, dest);
 }

Original file line number	Diff line number	Diff line change
`@@ -419,6 +419,6 @@ void __cxa_throw(void * exc, void * tinfo_, void (dest)(void ))`
`419`	`419`	`if (*tinfo == typeid(std::logic_error))`
`420`	`420`	`abort();`
`421`	`421`
`422`		`- auto orig_cxa_throw = (cxa_throw_type) dlsym(RTLD_NEXT, "__cxa_throw");`
	`422`	`+ static auto orig_cxa_throw = (cxa_throw_type) dlsym(RTLD_NEXT, "__cxa_throw");`
`423`	`423`	`orig_cxa_throw(exc, tinfo_, dest);`
`424`	`424`	`}`