selftests/powerpc: Check that signals always get delivered

Signed-off-by: Cyril Bur <cyrilbur@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Cyril Bur 2016-09-23 16:18:19 +10:00 committed by Michael Ellerman
parent 8e03bd4e70
commit ef186331b4
5 changed files with 285 additions and 0 deletions

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@ -19,6 +19,7 @@ SUB_DIRS = alignment \
dscr \
mm \
pmu \
signal \
primitives \
stringloops \
switch_endian \

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@ -0,0 +1,13 @@
TEST_PROGS := signal signal_tm
all: $(TEST_PROGS)
$(TEST_PROGS): ../harness.c ../utils.c signal.S
CFLAGS += -maltivec
signal_tm: CFLAGS += -mhtm
include ../../lib.mk
clean:
rm -f $(TEST_PROGS) *.o

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/*
* Copyright 2015, Cyril Bur, IBM Corp.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include "../basic_asm.h"
/* long signal_self(pid_t pid, int sig); */
FUNC_START(signal_self)
li r0,37 /* sys_kill */
/* r3 already has our pid in it */
/* r4 already has signal type in it */
sc
bc 4,3,1f
subfze r3,r3
1: blr
FUNC_END(signal_self)
/* long tm_signal_self(pid_t pid, int sig, int *ret); */
FUNC_START(tm_signal_self)
PUSH_BASIC_STACK(8)
std r5,STACK_FRAME_PARAM(0)(sp) /* ret */
tbegin.
beq 1f
tsuspend.
li r0,37 /* sys_kill */
/* r3 already has our pid in it */
/* r4 already has signal type in it */
sc
ld r5,STACK_FRAME_PARAM(0)(sp) /* ret */
bc 4,3,2f
subfze r3,r3
2: std r3,0(r5)
tabort. 0
tresume. /* Be nice to some cleanup, jumps back to tbegin then to 1: */
/*
* Transaction should be proper doomed and we should never get
* here
*/
li r3,1
POP_BASIC_STACK(8)
blr
1: li r3,0
POP_BASIC_STACK(8)
blr
FUNC_END(tm_signal_self)

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/*
* Copyright 2016, Cyril Bur, IBM Corp.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Sending one self a signal should always get delivered.
*/
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <altivec.h>
#include "utils.h"
#define MAX_ATTEMPT 500000
#define TIMEOUT 5
extern long signal_self(pid_t pid, int sig);
static sig_atomic_t signaled;
static sig_atomic_t fail;
static void signal_handler(int sig)
{
if (sig == SIGUSR1)
signaled = 1;
else
fail = 1;
}
static int test_signal()
{
int i;
struct sigaction act;
pid_t ppid = getpid();
pid_t pid;
act.sa_handler = signal_handler;
act.sa_flags = 0;
sigemptyset(&act.sa_mask);
if (sigaction(SIGUSR1, &act, NULL) < 0) {
perror("sigaction SIGUSR1");
exit(1);
}
if (sigaction(SIGALRM, &act, NULL) < 0) {
perror("sigaction SIGALRM");
exit(1);
}
/* Don't do this for MAX_ATTEMPT, its simply too long */
for(i = 0; i < 1000; i++) {
pid = fork();
if (pid == -1) {
perror("fork");
exit(1);
}
if (pid == 0) {
signal_self(ppid, SIGUSR1);
exit(1);
} else {
alarm(0); /* Disable any pending */
alarm(2);
while (!signaled && !fail)
asm volatile("": : :"memory");
if (!signaled) {
fprintf(stderr, "Didn't get signal from child\n");
FAIL_IF(1); /* For the line number */
}
/* Otherwise we'll loop too fast and fork() will eventually fail */
waitpid(pid, NULL, 0);
}
}
for (i = 0; i < MAX_ATTEMPT; i++) {
long rc;
alarm(0); /* Disable any pending */
signaled = 0;
alarm(TIMEOUT);
rc = signal_self(ppid, SIGUSR1);
if (rc) {
fprintf(stderr, "(%d) Fail reason: %d rc=0x%lx",
i, fail, rc);
FAIL_IF(1); /* For the line number */
}
while (!signaled && !fail)
asm volatile("": : :"memory");
if (!signaled) {
fprintf(stderr, "(%d) Fail reason: %d rc=0x%lx",
i, fail, rc);
FAIL_IF(1); /* For the line number */
}
}
return 0;
}
int main(void)
{
test_harness_set_timeout(300);
return test_harness(test_signal, "signal");
}

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/*
* Copyright 2016, Cyril Bur, IBM Corp.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Sending one self a signal should always get delivered.
*/
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <unistd.h>
#include <altivec.h>
#include "utils.h"
#include "../tm/tm.h"
#define MAX_ATTEMPT 500000
#define TIMEOUT 10
extern long tm_signal_self(pid_t pid, int sig, long *ret);
static sig_atomic_t signaled;
static sig_atomic_t fail;
static void signal_handler(int sig)
{
if (tcheck_active()) {
fail = 2;
return;
}
if (sig == SIGUSR1)
signaled = 1;
else
fail = 1;
}
static int test_signal_tm()
{
int i;
struct sigaction act;
act.sa_handler = signal_handler;
act.sa_flags = 0;
sigemptyset(&act.sa_mask);
if (sigaction(SIGUSR1, &act, NULL) < 0) {
perror("sigaction SIGUSR1");
exit(1);
}
if (sigaction(SIGALRM, &act, NULL) < 0) {
perror("sigaction SIGALRM");
exit(1);
}
SKIP_IF(!have_htm());
for (i = 0; i < MAX_ATTEMPT; i++) {
/*
* If anything bad happens in ASM and we fail to set ret
* because *handwave* TM this will cause failure
*/
long ret = 0xdead;
long rc = 0xbeef;
alarm(0); /* Disable any pending */
signaled = 0;
alarm(TIMEOUT);
FAIL_IF(tcheck_transactional());
rc = tm_signal_self(getpid(), SIGUSR1, &ret);
if (ret == 0xdead)
/*
* This basically means the transaction aborted before we
* even got to the suspend... this is crazy but it
* happens.
* Yes this also means we might never make forward
* progress... the alarm() will trip eventually...
*/
continue;
if (rc || ret) {
/* Ret is actually an errno */
printf("TEXASR 0x%016lx, TFIAR 0x%016lx\n",
__builtin_get_texasr(), __builtin_get_tfiar());
fprintf(stderr, "(%d) Fail reason: %d rc=0x%lx ret=0x%lx\n",
i, fail, rc, ret);
FAIL_IF(ret);
}
while(!signaled && !fail)
asm volatile("": : :"memory");
if (!signaled) {
fprintf(stderr, "(%d) Fail reason: %d rc=0x%lx ret=0x%lx\n",
i, fail, rc, ret);
FAIL_IF(fail); /* For the line number */
}
}
return 0;
}
int main(void)
{
return test_harness(test_signal_tm, "signal_tm");
}