107 lines
2.4 KiB
C
Executable file
107 lines
2.4 KiB
C
Executable file
/*
|
|
* Copyright 2015, Sam Bobroff, IBM Corp.
|
|
* Licensed under GPLv2.
|
|
*
|
|
* Test the kernel's system call code to ensure that a system call
|
|
* made from within an active HTM transaction is aborted with the
|
|
* correct failure code.
|
|
* Conversely, ensure that a system call made from within a
|
|
* suspended transaction can succeed.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <sys/syscall.h>
|
|
#include <asm/tm.h>
|
|
#include <sys/time.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "utils.h"
|
|
#include "tm.h"
|
|
|
|
extern int getppid_tm_active(void);
|
|
extern int getppid_tm_suspended(void);
|
|
|
|
unsigned retries = 0;
|
|
|
|
#define TEST_DURATION 10 /* seconds */
|
|
#define TM_RETRIES 100
|
|
|
|
pid_t getppid_tm(bool suspend)
|
|
{
|
|
int i;
|
|
pid_t pid;
|
|
|
|
for (i = 0; i < TM_RETRIES; i++) {
|
|
if (suspend)
|
|
pid = getppid_tm_suspended();
|
|
else
|
|
pid = getppid_tm_active();
|
|
|
|
if (pid >= 0)
|
|
return pid;
|
|
|
|
if (failure_is_persistent()) {
|
|
if (failure_is_syscall())
|
|
return -1;
|
|
|
|
printf("Unexpected persistent transaction failure.\n");
|
|
printf("TEXASR 0x%016lx, TFIAR 0x%016lx.\n",
|
|
__builtin_get_texasr(), __builtin_get_tfiar());
|
|
exit(-1);
|
|
}
|
|
|
|
retries++;
|
|
}
|
|
|
|
printf("Exceeded limit of %d temporary transaction failures.\n", TM_RETRIES);
|
|
printf("TEXASR 0x%016lx, TFIAR 0x%016lx.\n",
|
|
__builtin_get_texasr(), __builtin_get_tfiar());
|
|
|
|
exit(-1);
|
|
}
|
|
|
|
int tm_syscall(void)
|
|
{
|
|
unsigned count = 0;
|
|
struct timeval end, now;
|
|
|
|
SKIP_IF(!have_htm_nosc());
|
|
|
|
setbuf(stdout, NULL);
|
|
|
|
printf("Testing transactional syscalls for %d seconds...\n", TEST_DURATION);
|
|
|
|
gettimeofday(&end, NULL);
|
|
now.tv_sec = TEST_DURATION;
|
|
now.tv_usec = 0;
|
|
timeradd(&end, &now, &end);
|
|
|
|
for (count = 0; timercmp(&now, &end, <); count++) {
|
|
/*
|
|
* Test a syscall within a suspended transaction and verify
|
|
* that it succeeds.
|
|
*/
|
|
FAIL_IF(getppid_tm(true) == -1); /* Should succeed. */
|
|
|
|
/*
|
|
* Test a syscall within an active transaction and verify that
|
|
* it fails with the correct failure code.
|
|
*/
|
|
FAIL_IF(getppid_tm(false) != -1); /* Should fail... */
|
|
FAIL_IF(!failure_is_persistent()); /* ...persistently... */
|
|
FAIL_IF(!failure_is_syscall()); /* ...with code syscall. */
|
|
gettimeofday(&now, 0);
|
|
}
|
|
|
|
printf("%d active and suspended transactions behaved correctly.\n", count);
|
|
printf("(There were %d transaction retries.)\n", retries);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
return test_harness(tm_syscall, "tm_syscall");
|
|
}
|