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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>
This commit is contained in:
kamil 2018-05-27 17:16:39 +00:00
parent aaf79abf7f
commit d93c7a0a6b
1 changed files with 5 additions and 8 deletions
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13
tests/lib/libc/sys/t_ptrace_wait.h
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@ -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. * Copyright (c) 2016 The NetBSD Foundation, Inc.
@ -554,17 +554,14 @@ trigger_ill(void)
#endif #endif
} }
static int __used static void __used
trigger_fpe(void) trigger_fpe(void)
{ {
static volatile int a = 1; volatile int a = getpid();
static volatile int b = 0; volatile int b = atoi("0");
static volatile int c;
/* Division by zero causes CPU trap, translated to SIGFPE */ /* Division by zero causes CPU trap, translated to SIGFPE */
c = a / b; usleep(a / b);
return c;
} }
static void __used static void __used