You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
84 lines
2.0 KiB
84 lines
2.0 KiB
/*
|
|
* Copyright 2002-2019 Intel Corporation.
|
|
*
|
|
* This software is provided to you as Sample Source Code as defined in the accompanying
|
|
* End User License Agreement for the Intel(R) Software Development Products ("Agreement")
|
|
* section 1.L.
|
|
*
|
|
* This software and the related documents are provided as is, with no express or implied
|
|
* warranties, other than those that are expressly stated in the License.
|
|
*/
|
|
|
|
/*
|
|
* This test verifies that Pin correctly clears the DF bit when executing
|
|
* the application's signal handler.
|
|
*
|
|
* This test may also be run natively, bit it fails on older kernels
|
|
* because older kernels did not correctly clear DF on entry to a signal
|
|
* handler. (The same bug Pin used to have.)
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <signal.h>
|
|
#include <sys/time.h>
|
|
|
|
|
|
int DidTest;
|
|
int DFSet = 0;
|
|
int Flags;
|
|
|
|
extern void SetAndClearDF();
|
|
extern void SignalHandler(int);
|
|
|
|
|
|
int main()
|
|
{
|
|
struct sigaction sigact;
|
|
struct itimerval itval;
|
|
|
|
|
|
sigact.sa_handler = SignalHandler;
|
|
sigact.sa_flags = 0;
|
|
sigemptyset(&sigact.sa_mask);
|
|
if (sigaction(SIGALRM, &sigact, 0) == -1)
|
|
{
|
|
fprintf(stderr, "Unable to set up handler\n");
|
|
return 1;
|
|
}
|
|
|
|
itval.it_interval.tv_sec = 0;
|
|
itval.it_interval.tv_usec = 100000;
|
|
itval.it_value.tv_sec = 0;
|
|
itval.it_value.tv_usec = 100000;
|
|
if (setitimer(ITIMER_REAL, &itval, 0) == -1)
|
|
{
|
|
fprintf(stderr, "Unable to set up timer\n");
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Continuously set and clear the DF bit until a signal arrives while DF is set.
|
|
*/
|
|
while (!DidTest)
|
|
SetAndClearDF();
|
|
|
|
itval.it_value.tv_sec = 0;
|
|
itval.it_value.tv_usec = 0;
|
|
if (setitimer(ITIMER_REAL, &itval, 0) == -1)
|
|
{
|
|
fprintf(stderr, "Unable to disable timer\n");
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* The signal handler copied the flags to 'Flags'. Make sure the DF bit was
|
|
* cleared in the handler.
|
|
*/
|
|
if (Flags & (1<<10))
|
|
{
|
|
fprintf(stderr, "DF bit set incorrectly in signal handler\n");
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|