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Code Issues Releases Activity

Add another fd leak test for accept() I used to test the fix in 1.234 of

Browse Source 
sys/kern/uipc_syscall.c.
This commit is contained in:
John Baldwin 2007-04-02 16:02:50 +00:00
parent 1b0a8a3e52
commit c16551befc
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=168273
1 changed files with 83 additions and 1 deletions
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84
tools/regression/sockets/accept_fd_leak/accept_fd_leak.c
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@ -28,12 +28,14 @@
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <netinet/in.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -41,6 +43,14 @@
#define LOOPS 500
volatile int quit;
static void
child_died(int sig)
{
quit = 1;
}
/*
* This test is intended to detect a leak of a file descriptor in the process
* following a failed non-blocking accept. It measures an available fd
@ -53,9 +63,11 @@ main(int argc, char *argv[])
{
struct sockaddr_in sin;
socklen_t size;
pid_t child;
int fd1, fd2, fd3, i, s;
int status;
printf("1..1\n");
printf("1..2\n");
/*
* Check for sequential fd allocation, and give up early if not.
@ -111,5 +123,75 @@ main(int argc, char *argv[])
else
printf("ok 1\n");
/*
* Try failing accept's w/o non-blocking where the destination
* address pointer is invalid.
*/
close(fd3);
signal(SIGCHLD, child_died);
child = fork();
if (child < 0)
errx(-1, "fork: %s", strerror(errno));
/*
* Child process does 1000 connect's.
*/
if (child == 0) {
bzero(&sin, sizeof(sin));
sin.sin_len = sizeof(sin);
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
sin.sin_port = htons(8080);
for (i = 0; i < 1000; i++) {
s = socket(PF_INET, SOCK_STREAM, 0);
if (s == -1)
errx(-1, "socket: %s", strerror(errno));
if (connect(s, (struct sockaddr *)&sin,
sizeof(sin)) < 0)
errx(-1, "connect: %s", strerror(errno));
close(s);
}
exit(0);
}
/* Reset back to a blocking socket. */
i = fcntl(s, F_GETFL);
if (i == -1)
errx(-1, "ioctl(F_GETFL): %s", strerror(errno));
i &= ~O_NONBLOCK;
if (fcntl(s, F_SETFL, i) != 0)
errx(-1, "ioctl(F_SETFL): %s", strerror(errno));
i = fcntl(s, F_GETFL);
if (i == -1)
errx(-1, "ioctl(F_GETFL): %s", strerror(errno));
if (i & O_NONBLOCK)
errx(-1, "Failed to clear O_NONBLOCK (i=0x%x)\n", i);
/* Do 1000 accept's with an invalid pointer. */
for (i = 0; !quit && i < 1000; i++) {
size = sizeof(sin);
if (accept(s, (struct sockaddr *)(uintptr_t)(0x100),
&size) != -1)
errx(-1, "accept succeeded\n");
if (errno != EFAULT)
errx(-1, "accept: %s", strerror(errno));
}
if (waitpid(child, &status, 0) < 0)
errx(-1, "waitpid: %s", strerror(errno));
if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
warnx("child process died");
/*
* Allocate a file descriptor and make sure it's fd2+2. 2 because
* we allocate an fd for the socket.
*/
fd3 = dup(STDIN_FILENO);
if (fd3 != fd2 + 2)
printf("not ok 2 - (%d, %d, %d)\n", fd1, fd2, fd3);
else
printf("ok 2\n");
return (0);
}