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/*
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* Copyright 2003-2005 Sun Microsystems, Inc. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of Sun Microsystems nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#ifndef LINUX
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#include <procfs.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <sys/errno.h>
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#include <unistd.h>
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#include <errno.h>
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#include <dlfcn.h>
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#include <sys/time.h>
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#include <netdb.h>
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#include <netinet/in.h>
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#include <sys/param.h>
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#include <time.h>
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#include "jni.h"
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#include "hprof.h"
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int
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md_getpid(void)
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{
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static int pid = -1;
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if ( pid >= 0 ) {
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return pid;
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}
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pid = getpid();
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return pid;
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}
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void
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md_sleep(unsigned seconds)
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{
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sleep(seconds);
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}
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void
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md_init(void)
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{
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#ifdef LINUX
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/* No Hi-Res timer option? */
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#else
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if ( gdata->micro_state_accounting ) {
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char proc_ctl_fn[48];
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int procfd;
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/* Turn on micro state accounting, once per process */
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(void)md_snprintf(proc_ctl_fn, sizeof(proc_ctl_fn),
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"/proc/%d/ctl", md_getpid());
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procfd = open(proc_ctl_fn, O_WRONLY);
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if (procfd >= 0) {
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long ctl_op[2];
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ctl_op[0] = PCSET;
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ctl_op[1] = PR_MSACCT;
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(void)write(procfd, ctl_op, sizeof(ctl_op));
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(void)close(procfd);
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}
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}
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#endif
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}
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int
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md_connect(char *hostname, unsigned short port)
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{
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struct hostent *hentry;
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struct sockaddr_in s;
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int fd;
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/* create a socket */
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fd = socket(AF_INET, SOCK_STREAM, 0);
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/* find remote host's addr from name */
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if ((hentry = gethostbyname(hostname)) == NULL) {
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return -1;
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}
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(void)memset((char *)&s, 0, sizeof(s));
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/* set remote host's addr; its already in network byte order */
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(void)memcpy(&s.sin_addr.s_addr, *(hentry->h_addr_list),
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(int)sizeof(s.sin_addr.s_addr));
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/* set remote host's port */
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s.sin_port = htons(port);
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s.sin_family = AF_INET;
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/* now try connecting */
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if (-1 == connect(fd, (struct sockaddr*)&s, sizeof(s))) {
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return 0;
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}
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return fd;
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}
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int
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md_recv(int f, char *buf, int len, int option)
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{
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return recv(f, buf, len, option);
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}
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int
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md_shutdown(int filedes, int option)
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{
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return shutdown(filedes, option);
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}
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int
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md_open(const char *filename)
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{
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return open(filename, O_RDONLY);
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}
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int
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md_open_binary(const char *filename)
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{
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return md_open(filename);
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}
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int
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md_creat(const char *filename)
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{
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return open(filename, O_WRONLY | O_CREAT | O_TRUNC,
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S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
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}
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int
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md_creat_binary(const char *filename)
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{
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return md_creat(filename);
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}
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jlong
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md_seek(int filedes, jlong cur)
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{
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jlong new_pos;
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if ( cur == (jlong)-1 ) {
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new_pos = lseek(filedes, 0, SEEK_END);
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} else {
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new_pos = lseek(filedes, cur, SEEK_SET);
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}
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return new_pos;
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}
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void
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md_close(int filedes)
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{
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(void)close(filedes);
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}
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int
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md_send(int s, const char *msg, int len, int flags)
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{
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int res;
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do {
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res = send(s, msg, len, flags);
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} while ((res < 0) && (errno == EINTR));
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return res;
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}
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int
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md_write(int filedes, const void *buf, int nbyte)
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{
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int res;
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do {
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res = write(filedes, buf, nbyte);
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} while ((res < 0) && (errno == EINTR));
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return res;
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}
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int
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md_read(int filedes, void *buf, int nbyte)
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{
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int res;
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do {
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res = read(filedes, buf, nbyte);
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} while ((res < 0) && (errno == EINTR));
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return res;
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}
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/* Time of day in milli-seconds */
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static jlong
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md_timeofday(void)
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{
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struct timeval tv;
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if ( gettimeofday(&tv, (void *)0) != 0 ) {
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return (jlong)0; /* EOVERFLOW ? */
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}
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/*LINTED*/
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return ((jlong)tv.tv_sec * (jlong)1000) + (jlong)(tv.tv_usec / 1000);
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}
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/* Hi-res timer in micro-seconds */
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jlong
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md_get_microsecs(void)
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{
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#ifdef LINUX
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return (jlong)(md_timeofday() * (jlong)1000); /* Milli to micro */
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#else
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return (jlong)(gethrtime()/(hrtime_t)1000); /* Nano seconds to micro seconds */
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#endif
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}
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/* Time of day in milli-seconds */
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jlong
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md_get_timemillis(void)
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{
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return md_timeofday();
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}
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/* Current CPU hi-res CPU time used */
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jlong
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md_get_thread_cpu_timemillis(void)
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{
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#ifdef LINUX
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return md_timeofday();
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#else
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return (jlong)(gethrvtime()/1000); /* Nano seconds to milli seconds */
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#endif
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}
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void
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md_get_prelude_path(char *path, int path_len, char *filename)
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{
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void *addr;
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char libdir[FILENAME_MAX+1];
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Dl_info dlinfo;
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libdir[0] = 0;
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#ifdef LINUX
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addr = (void*)&Agent_OnLoad;
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#else
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/* Just using &Agent_OnLoad will get the first external symbol with
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* this name in the first .so, which may not be libhprof.so.
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* On Solaris we can actually ask for the address of our Agent_OnLoad.
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*/
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addr = dlsym(RTLD_SELF, "Agent_OnLoad");
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/* Just in case the above didn't work (missing linker patch?). */
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if ( addr == NULL ) {
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addr = (void*)&Agent_OnLoad;
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}
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#endif
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/* Use dladdr() to get the full path to libhprof.so, which we use to find
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* the prelude file.
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*/
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dlinfo.dli_fname = NULL;
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(void)dladdr(addr, &dlinfo);
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if ( dlinfo.dli_fname != NULL ) {
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char * lastSlash;
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/* Full path to library name, need to move up one directory to 'lib' */
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(void)strcpy(libdir, (char *)dlinfo.dli_fname);
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lastSlash = strrchr(libdir, '/');
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if ( lastSlash != NULL ) {
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*lastSlash = '\0';
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}
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lastSlash = strrchr(libdir, '/');
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if ( lastSlash != NULL ) {
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*lastSlash = '\0';
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}
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}
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(void)snprintf(path, path_len, "%s/%s", libdir, filename);
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}
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int
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md_vsnprintf(char *s, int n, const char *format, va_list ap)
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{
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return vsnprintf(s, n, format, ap);
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}
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int
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md_snprintf(char *s, int n, const char *format, ...)
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{
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int ret;
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va_list ap;
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va_start(ap, format);
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ret = md_vsnprintf(s, n, format, ap);
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va_end(ap);
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return ret;
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}
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void
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md_system_error(char *buf, int len)
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{
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char *p;
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buf[0] = 0;
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p = strerror(errno);
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if ( p != NULL ) {
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(void)strcpy(buf, p);
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}
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}
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unsigned
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md_htons(unsigned short s)
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{
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return htons(s);
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}
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unsigned
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md_htonl(unsigned l)
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{
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return htonl(l);
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}
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unsigned
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md_ntohs(unsigned short s)
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{
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return ntohs(s);
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}
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unsigned
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md_ntohl(unsigned l)
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{
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return ntohl(l);
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}
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/* Create the actual fill filename for a dynamic library. */
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void
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md_build_library_name(char *holder, int holderlen, char *pname, char *fname)
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{
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int pnamelen;
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/* Length of options directory location. */
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pnamelen = pname ? strlen(pname) : 0;
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/* Quietly truncate on buffer overflow. Should be an error. */
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if (pnamelen + (int)strlen(fname) + 10 > holderlen) {
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*holder = '\0';
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return;
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}
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/* Construct path to library */
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if (pnamelen == 0) {
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(void)snprintf(holder, holderlen, "lib%s.so", fname);
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} else {
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(void)snprintf(holder, holderlen, "%s/lib%s.so", pname, fname);
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}
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}
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/* Load this library (return NULL on error, and error message in err_buf) */
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void *
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md_load_library(const char *name, char *err_buf, int err_buflen)
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{
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void * result;
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result = dlopen(name, RTLD_LAZY);
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if (result == NULL) {
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(void)strncpy(err_buf, dlerror(), err_buflen-2);
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err_buf[err_buflen-1] = '\0';
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}
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return result;
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}
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/* Unload this library */
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void
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md_unload_library(void *handle)
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{
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(void)dlclose(handle);
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}
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409 |
/* Find an entry point inside this library (return NULL if not found) */
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void *
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md_find_library_entry(void *handle, const char *name)
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{
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void * sym;
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sym = dlsym(handle, name);
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return sym;
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}
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