Module Name: src
Committed By: mrg
Date: Wed Jan 30 22:46:49 UTC 2019
Modified Files:
src/lib/libexecinfo: unwind.c
Log Message:
make the backtrace()'s tracer() return _URC_FOREIGN_EXCEPTION_CAUGHT
when the array is full. it won't be able to do any more work if so,
and avoids infinite loops in unwinding as seen on arm64.
XXX: lack of signal support here means that backtrace() is useless
XXX: from a signal handler, such as attempting to display the stack
XXX: when handling a SIGSEGV.
To generate a diff of this commit:
cvs rdiff -u -r1.2 -r1.3 src/lib/libexecinfo/unwind.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/lib/libexecinfo/unwind.c
diff -u src/lib/libexecinfo/unwind.c:1.2 src/lib/libexecinfo/unwind.c:1.3
--- src/lib/libexecinfo/unwind.c:1.2 Mon Mar 24 21:26:01 2014
+++ src/lib/libexecinfo/unwind.c Wed Jan 30 22:46:49 2019
@@ -1,4 +1,4 @@
-/* $NetBSD: unwind.c,v 1.2 2014/03/24 21:26:01 joerg Exp $ */
+/* $NetBSD: unwind.c,v 1.3 2019/01/30 22:46:49 mrg Exp $ */
/*-
* Copyright (c) 2012 The NetBSD Foundation, Inc.
@@ -52,6 +52,8 @@ tracer(struct _Unwind_Context *ctx, void
}
if (t->n < t->len)
t->arr[t->n++] = (void *)_Unwind_GetIP(ctx);
+ else
+ return _URC_FOREIGN_EXCEPTION_CAUGHT;
return 0;
}
