+2007-03-22 David Daney <ddaney@avtrex.com>
+
+ PR libgcj/31228
+ * configure.ac: Add checks for getrlimit and sys/resource.h.
+ * include/posix.h (_Jv_platform_close_on_exec): Remove.
+ * include/config.h.in: Regenerate.
+ * configure: Regenerate.
+ * gnu/java/nio/channels/natFileChannelPosix.cc (open): Remove call to
+ _Jv_platform_close_on_exec;
+ * gnu/java/net/natPlainSocketImplPosix.cc (create): Likewise.
+ (accept): Likewise.
+ * gnu/java/net/natPlainDatagramSocketImplPosix.cc (create):Likewise.
+ * java/lang/natPosixProcess.cc: Include sys/resource.h.
+ (nativeSpawn): Close all file descriptors. Don't set FD_CLOEXEC on
+ pipes.
+
2007-03-20 Andrew Haley <aph@redhat.com>
* testsuite/libjava.lang/PR31264.java: New test.
+
for ac_func in strerror ioctl select fstat open fsync sleep opendir \
access stat lstat mkdir rename rmdir unlink utime chmod readlink \
nl_langinfo setlocale \
inet_pton uname inet_ntoa \
- fork execvp pipe sigaction ftruncate mmap \
+ fork execvp getrlimit pipe sigaction ftruncate mmap \
getifaddrs
do
as_ac_var=`echo "ac_cv_func_$ac_func" | $as_tr_sh`
-for ac_header in execinfo.h unistd.h dlfcn.h
+
+for ac_header in execinfo.h unistd.h dlfcn.h sys/resource.h
do
as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
if eval "test \"\${$as_ac_Header+set}\" = set"; then
access stat lstat mkdir rename rmdir unlink utime chmod readlink \
nl_langinfo setlocale \
inet_pton uname inet_ntoa \
- fork execvp pipe sigaction ftruncate mmap \
+ fork execvp getrlimit pipe sigaction ftruncate mmap \
getifaddrs])
AC_CHECK_FUNCS(inet_aton inet_addr, break)
- AC_CHECK_HEADERS(execinfo.h unistd.h dlfcn.h)
+ AC_CHECK_HEADERS(execinfo.h unistd.h dlfcn.h sys/resource.h)
# Do an additional check on dld, HP-UX for example has dladdr in libdld.sl
AC_CHECK_LIB(dl, dladdr, [
AC_DEFINE(HAVE_DLADDR, 1, [Define if you have dladdr()])], [
throw new ::java::net::SocketException (JvNewStringUTF (strerr));
}
- _Jv_platform_close_on_exec (sock);
-
// We use native_fd in place of fd here. From leaving fd null we avoid
// the double close problem in FileDescriptor.finalize.
native_fd = sock;
throw new ::java::io::IOException (JvNewStringUTF (strerr));
}
- _Jv_platform_close_on_exec (sock);
-
// We use native_fd in place of fd here. From leaving fd null we avoid
// the double close problem in FileDescriptor.finalize.
native_fd = sock;
if (new_socket < 0)
goto error;
- _Jv_platform_close_on_exec (new_socket);
-
jbyteArray raddr;
jint rport;
if (u.address.sin_family == AF_INET)
throw new ::java::io::FileNotFoundException (msg->toString ());
}
- _Jv_platform_close_on_exec (fd);
-
return fd;
}
/* Define to 1 if you have the `getpwuid_r' function. */
#undef HAVE_GETPWUID_R
+/* Define to 1 if you have the `getrlimit' function. */
+#undef HAVE_GETRLIMIT
+
/* Define to 1 if you have the `gettimeofday' function. */
#undef HAVE_GETTIMEOFDAY
/* Define to 1 if you have the <sys/ioctl.h> header file. */
#undef HAVE_SYS_IOCTL_H
+/* Define to 1 if you have the <sys/resource.h> header file. */
+#undef HAVE_SYS_RESOURCE_H
+
/* Define to 1 if you have the <sys/rw_lock.h> header file. */
#undef HAVE_SYS_RW_LOCK_H
extern void _Jv_platform_initialize (void);
extern void _Jv_platform_initProperties (java::util::Properties*);
-inline void
-_Jv_platform_close_on_exec (jint fd)
-{
- // Ignore errors.
- ::fcntl (fd, F_SETFD, FD_CLOEXEC);
-}
-
-#undef fcntl
-
#ifdef JV_HASH_SYNCHRONIZATION
#ifndef HAVE_USLEEP_DECL
extern "C" int usleep (useconds_t useconds);
#include <fcntl.h>
#include <sys/types.h>
#include <sys/wait.h>
+#ifdef HAVE_SYS_RESOURCE_H
+#include <sys/resource.h>
+#endif
#include <signal.h>
#include <string.h>
#include <stdlib.h>
_exit (127);
}
}
-
+ // Make sure all file descriptors are closed. In
+ // multi-threaded programs, there is a race between when a
+ // descriptor is obtained, when we can set FD_CLOEXEC, and
+ // fork(). If the fork occurs before FD_CLOEXEC is set, the
+ // descriptor would leak to the execed process if we did not
+ // manually close it. So that is what we do. Since we
+ // close all the descriptors, it is redundant to set
+ // FD_CLOEXEC on them elsewhere.
+ int max_fd;
+#ifdef HAVE_GETRLIMIT
+ rlimit rl;
+ int rv = getrlimit(RLIMIT_NOFILE, &rl);
+ if (rv == 0)
+ max_fd = rl.rlim_max - 1;
+ else
+ max_fd = 1024 - 1;
+#else
+ max_fd = 1024 - 1;
+#endif
+ while(max_fd > 2)
+ {
+ if (max_fd != msgp[1])
+ close (max_fd);
+ max_fd--;
+ }
// Make sure that SIGCHLD is unblocked for the new process.
sigset_t mask;
sigemptyset (&mask);
myclose (msgp[0]);
cleanup (args, env, path);
-
- if (exception == NULL)
- {
- fcntl (outp[1], F_SETFD, FD_CLOEXEC);
- fcntl (inp[0], F_SETFD, FD_CLOEXEC);
- if (! redirect)
- fcntl (errp[0], F_SETFD, FD_CLOEXEC);
- }
}