Commit d95be4ca authored by Rashmica Gupta's avatar Rashmica Gupta Committed by Michael Ellerman

selftests/powerpc: Add test for forking inside transaction

This test does a fork syscall inside a transaction. Basic sniff test to see
if we can enter the kernel during a transaction.
Signed-off-by: default avatarRashmica Gupta <rashmicy@gmail.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent da3ddc3b
...@@ -3,3 +3,4 @@ tm-syscall ...@@ -3,3 +3,4 @@ tm-syscall
tm-signal-msr-resv tm-signal-msr-resv
tm-signal-stack tm-signal-stack
tm-vmxcopy tm-vmxcopy
tm-fork
TEST_PROGS := tm-resched-dscr tm-syscall tm-signal-msr-resv tm-signal-stack tm-vmxcopy TEST_PROGS := tm-resched-dscr tm-syscall tm-signal-msr-resv tm-signal-stack tm-vmxcopy tm-fork
all: $(TEST_PROGS) all: $(TEST_PROGS)
......
/*
* Copyright 2015, Michael Neuling, IBM Corp.
* Licensed under GPLv2.
*
* Edited: Rashmica Gupta, Nov 2015
*
* This test does a fork syscall inside a transaction. Basic sniff test
* to see if we can enter the kernel during a transaction.
*/
#include <errno.h>
#include <inttypes.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "utils.h"
#include "tm.h"
int test_fork(void)
{
SKIP_IF(!have_htm());
asm __volatile__(
"tbegin.;"
"blt 1f; "
"li 0, 2;" /* fork syscall */
"sc ;"
"tend.;"
"1: ;"
: : : "memory", "r0");
/* If we reach here, we've passed. Otherwise we've probably crashed
* the kernel */
return 0;
}
int main(int argc, char *argv[])
{
return test_harness(test_fork, "tm_fork");
}
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