Module Name: src
Committed By: kamil
Date: Sun May 27 17:16:39 UTC 2018
Modified Files:
src/tests/lib/libc/sys: t_ptrace_wait.h
Log Message:
Try to fool $CC harder in ATF ptrace(2) tests in trigger_fpe()
A function that returns a value that is not used, can be optimized out by
a compiler. Try to fool the compiler with calling libc functions that shall
trigger a division by zero crash.
Sponsored by <The NetBSD Foundation>
To generate a diff of this commit:
cvs rdiff -u -r1.8 -r1.9 src/tests/lib/libc/sys/t_ptrace_wait.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/tests/lib/libc/sys/t_ptrace_wait.h
diff -u src/tests/lib/libc/sys/t_ptrace_wait.h:1.8 src/tests/lib/libc/sys/t_ptrace_wait.h:1.9
--- src/tests/lib/libc/sys/t_ptrace_wait.h:1.8 Sat May 26 15:15:17 2018
+++ src/tests/lib/libc/sys/t_ptrace_wait.h Sun May 27 17:16:39 2018
@@ -1,4 +1,4 @@
-/* $NetBSD: t_ptrace_wait.h,v 1.8 2018/05/26 15:15:17 kamil Exp $ */
+/* $NetBSD: t_ptrace_wait.h,v 1.9 2018/05/27 17:16:39 kamil Exp $ */
/*-
* Copyright (c) 2016 The NetBSD Foundation, Inc.
@@ -554,17 +554,14 @@ trigger_ill(void)
#endif
}
-static int __used
+static void __used
trigger_fpe(void)
{
- static volatile int a = 1;
- static volatile int b = 0;
- static volatile int c;
+ volatile int a = getpid();
+ volatile int b = atoi("0");
/* Division by zero causes CPU trap, translated to SIGFPE */
- c = a / b;
-
- return c;
+ usleep(a / b);
}
static void __used
