+/*
+ * Copyright (C) 2016 Julien Desfossez <jdesfossez@efficios.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-only
+ *
+ */
+
#include <stdio.h>
#include <poll.h>
#include <signal.h>
#include <limits.h>
#include <pthread.h>
#include <sys/mman.h>
-#include <time.h>
+#include <common/compat/time.h>
#define BUF_SIZE 256
#define NB_FD 1
#define MSEC_PER_NSEC (MSEC_PER_USEC * 1000)
static int timeout; /* seconds, -1 to disable */
-volatile static int stop_thread;
+static volatile int stop_thread;
static int wait_fd;
struct ppoll_thread_data {
int value;
};
+static
void test_select_big(void)
{
fd_set rfds, wfds, exfds;
return;
}
+static
void test_pselect(void)
{
fd_set rfds;
}
+static
void test_select(void)
{
fd_set rfds;
}
+static
void test_poll(void)
{
struct pollfd ufds[NB_FD];
}
}
+static
void test_ppoll(void)
{
struct pollfd ufds[NB_FD];
}
}
+static
void test_ppoll_big(void)
{
struct pollfd ufds[MAX_FDS];
return;
}
+static
void test_epoll(void)
{
int ret, epollfd;
return;
}
+static
void test_pepoll(void)
{
int ret, epollfd;
return;
}
+static
void run_working_cases(void)
{
int ret;
* segfault (eventually with a "*** stack smashing detected ***" message).
* The event should contain an array of 100 FDs filled with garbage.
*/
+static
void ppoll_fds_buffer_overflow(void)
{
struct pollfd ufds[NB_FD];
* cleanly fail with a "Invalid argument".
* The event should contain an empty array of FDs and overflow = 1.
*/
+static
void ppoll_fds_ulong_max(void)
{
struct pollfd ufds[NB_FD];
}
/*
- * Select is limited to 1024 FDs, should output a pselect event
- * with 0 FDs.
+ * Pass an invalid file descriptor to pselect6(). The syscall should return
+ * -EBADF. The recorded event should contain a "ret = -EBADF (-9)".
*/
-void pselect_fd_too_big(void)
+static
+void pselect_invalid_fd(void)
{
fd_set rfds;
int ret;
- int fd2;
+ int fd;
char buf[BUF_SIZE];
/*
- * Test if nfds > 1024.
- * Make sure ulimit is set correctly (ulimit -n 2048).
+ * Open a file, close it and use the closed FD in the pselect6 call.
*/
- fd2 = dup2(wait_fd, 2047);
- if (fd2 != 2047) {
- perror("dup2");
- return;
+
+ fd = open("/dev/null", O_RDONLY);
+ if (fd == -1) {
+ perror("open");
+ goto error;
}
- FD_ZERO(&rfds);
- FD_SET(fd2, &rfds);
- ret = syscall(SYS_pselect6, fd2 + 1, &rfds, NULL, NULL, NULL, NULL);
+ ret = close(fd);
+ if (ret == -1) {
+ perror("close");
+ goto error;
+ }
+ FD_ZERO(&rfds);
+ FD_SET(fd, &rfds);
+
+ ret = syscall(SYS_pselect6, fd + 1, &rfds, NULL, NULL, NULL, NULL);
if (ret == -1) {
perror("# pselect()");
} else if (ret) {
} else {
printf("# [pselect] timeout\n");
}
-
+error:
+ return;
}
/*
* Invalid pointer as writefds, should output a ppoll event
* with 0 FDs.
*/
+static
void pselect_invalid_pointer(void)
{
fd_set rfds;
* Pass an invalid pointer to epoll_pwait, should fail with
* "Bad address", the event returns 0 FDs.
*/
+static
void epoll_pwait_invalid_pointer(void)
{
int ret, epollfd;
* Set maxevents to INT_MAX, should output "Invalid argument"
* The event should return an empty array.
*/
+static
void epoll_pwait_int_max(void)
{
int ret, epollfd;
return;
}
+static
void *ppoll_writer(void *arg)
{
struct ppoll_thread_data *data = (struct ppoll_thread_data *) arg;
return NULL;
}
+static
void do_ppoll(int *fds, struct pollfd *ufds)
{
int i, ret;
}
}
+static
void stress_ppoll(int *fds, int value)
{
pthread_t writer;
*
* ppoll should work as expected and the trace should be readable at the end.
*/
+static
void ppoll_concurrent_write(void)
{
int i, ret, fds[MAX_FDS];
return;
}
+static
void *epoll_pwait_writer(void *addr)
{
srand(time(NULL));
* buffer allocated for the returned data. This should randomly segfault.
* The trace should be readable and no kernel OOPS should occur.
*/
+static
void epoll_pwait_concurrent_munmap(void)
{
int ret, epollfd, i, fds[MAX_FDS];
char buf[BUF_SIZE];
struct epoll_event *epoll_event;
- void *addr = NULL;
pthread_t writer;
-
+ for (i = 0; i < MAX_FDS; i++) {
+ fds[i] = -1;
+ }
epollfd = epoll_create(MAX_FDS);
if (epollfd < 0) {
perror("[eppoll] create");
goto end;
}
- epoll_event = mmap(addr, MAX_FDS * sizeof(struct epoll_event),
+ epoll_event = mmap(NULL, MAX_FDS * sizeof(struct epoll_event),
PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS,
-1, 0);
if (epoll_event == MAP_FAILED) {
(void *) epoll_event);
if (ret != 0) {
fprintf(stderr, "[error] pthread_create\n");
- goto end;
+ goto end_unmap;
}
ret = epoll_pwait(epollfd, epoll_event, 1, 1, NULL);
}
}
- ret = munmap(addr, MAX_FDS * sizeof(struct epoll_event));
+ ret = munmap(epoll_event, MAX_FDS * sizeof(struct epoll_event));
if (ret != 0) {
perror("munmap");
}
return;
}
-void usage(poptContext optCon, int exitcode, char *error, char *addl)
-{
- poptPrintUsage(optCon, stderr, 0);
- if (error) {
- fprintf(stderr, "%s: %s\n", error, addl);
- }
- exit(exitcode);
-}
-
+static
void print_list(void)
{
fprintf(stderr, "Test list (-t X):\n");
"and epoll, waiting for input\n");
fprintf(stderr, "\t2: Timeout cases (1ms) for select, pselect6, poll, "
"ppoll and epoll\n");
- fprintf(stderr, "\t3: pselect with a FD > 1023\n");
+ fprintf(stderr, "\t3: pselect with an invalid fd\n");
fprintf(stderr, "\t4: ppoll with %d FDs\n", MAX_FDS);
fprintf(stderr, "\t5: ppoll buffer overflow, should segfault, waits "
"for input\n");
- fprintf(stderr, "\t6: pselect with invalid pointer, waits for "
+ fprintf(stderr, "\t6: pselect with an invalid pointer, waits for "
"input\n");
fprintf(stderr, "\t7: ppoll with ulong_max fds, waits for input\n");
- fprintf(stderr, "\t8: epoll_pwait with invalid pointer, waits for "
+ fprintf(stderr, "\t8: epoll_pwait with an invalid pointer, waits for "
"input\n");
fprintf(stderr, "\t9: epoll_pwait with maxevents set to INT_MAX, "
"waits for input\n");
run_working_cases();
break;
case 3:
- pselect_fd_too_big();
+ pselect_invalid_fd();
break;
case 4:
test_ppoll_big();
projects / lttng-tools.git / blobdiff