1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
6136 int s, status ;
6137 status = os::Solaris::mutex_lock (_mutex) ;
6138 assert (status == 0, "invariant") ;
6139 s = _counter;
6140 _counter = 1;
6141 status = os::Solaris::mutex_unlock (_mutex) ;
6142 assert (status == 0, "invariant") ;
6143
6144 if (s < 1) {
6145 status = os::Solaris::cond_signal (_cond) ;
6146 assert (status == 0, "invariant") ;
6147 }
6148 }
6149
6150 extern char** environ;
6151
6152 // Run the specified command in a separate process. Return its exit value,
6153 // or -1 on failure (e.g. can't fork a new process).
6154 // Unlike system(), this function can be called from signal handler. It
6155 // doesn't block SIGINT et al.
6156 int os::fork_and_exec(char* cmd) {
6157 char * argv[4];
6158 argv[0] = (char *)"sh";
6159 argv[1] = (char *)"-c";
6160 argv[2] = cmd;
6161 argv[3] = NULL;
6162
6163 // fork is async-safe, fork1 is not so can't use in signal handler
6164 pid_t pid;
6165 Thread* t = ThreadLocalStorage::get_thread_slow();
6166 if (t != NULL && t->is_inside_signal_handler()) {
6167 pid = fork();
6168 } else {
6169 pid = fork1();
6170 }
6171
6172 if (pid < 0) {
6173 // fork failed
6174 warning("fork failed: %s", strerror(errno));
6175 return -1;
6176
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1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
6136 int s, status ;
6137 status = os::Solaris::mutex_lock (_mutex) ;
6138 assert (status == 0, "invariant") ;
6139 s = _counter;
6140 _counter = 1;
6141 status = os::Solaris::mutex_unlock (_mutex) ;
6142 assert (status == 0, "invariant") ;
6143
6144 if (s < 1) {
6145 status = os::Solaris::cond_signal (_cond) ;
6146 assert (status == 0, "invariant") ;
6147 }
6148 }
6149
6150 extern char** environ;
6151
6152 // Run the specified command in a separate process. Return its exit value,
6153 // or -1 on failure (e.g. can't fork a new process).
6154 // Unlike system(), this function can be called from signal handler. It
6155 // doesn't block SIGINT et al.
6156 int os::fork_and_exec(char* cmd, bool use_vfork_if_available) {
6157 char * argv[4];
6158 argv[0] = (char *)"sh";
6159 argv[1] = (char *)"-c";
6160 argv[2] = cmd;
6161 argv[3] = NULL;
6162
6163 // fork is async-safe, fork1 is not so can't use in signal handler
6164 pid_t pid;
6165 Thread* t = ThreadLocalStorage::get_thread_slow();
6166 if (t != NULL && t->is_inside_signal_handler()) {
6167 pid = fork();
6168 } else {
6169 pid = fork1();
6170 }
6171
6172 if (pid < 0) {
6173 // fork failed
6174 warning("fork failed: %s", strerror(errno));
6175 return -1;
6176
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