[gcc r12-8762] runtime: ignore __morestack function in runtime.Callers

[Ian Lance Taylor]

https://gcc.gnu.org/g:21a3f43c6888b216ab70ef9aff5c3903ed1f218f

commit r12-8762-g21a3f43c6888b216ab70ef9aff5c3903ed1f218f
Author: Ian Lance Taylor <iant@golang.org>
Date:   Tue Sep 13 10:33:20 2022 -0700

    runtime: ignore __morestack function in runtime.Callers
    
    Backport from trunk.
    
    We were ignoring all functions starting with "__morestack_", but not
    the function "__morestack" itself.  Without this change, some tests
    such as recover.go started failing recently, though I'm not sure
    exactly what changed.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/427935

Diff:
---
 libgo/runtime/go-callers.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libgo/runtime/go-callers.c b/libgo/runtime/go-callers.c
index 31783696a08..1d4dee66279 100644
--- a/libgo/runtime/go-callers.c
+++ b/libgo/runtime/go-callers.c
@@ -107,7 +107,7 @@ callback (void *data, uintptr_t pc, const char *filename, int lineno,
       p = function;
       if (__builtin_strncmp (p, "___", 3) == 0)
 	++p;
-      if (__builtin_strncmp (p, "__morestack_", 12) == 0)
+      if (__builtin_strncmp (p, "__morestack", 11) == 0)
 	return 0;
     }
   else if (filename != NULL)