1 /*
   2  * Copyright (c) 2003, 2013, 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  *
  23  */
  24 
  25 #ifndef _LIBPROC_H_
  26 #define _LIBPROC_H_
  27 
  28 #include <jni.h>
  29 #include <unistd.h>
  30 #include <stdint.h>
  31 #include "proc_service.h"
  32 
  33 #if defined(arm) || defined(ppc)
  34 #include "libproc_md.h"
  35 #endif
  36 
  37 #include <sys/ptrace.h>
  38 
  39 /************************************************************************************
  40 
  41 0. This is very minimal subset of Solaris libproc just enough for current application.
  42 Please note that the bulk of the functionality is from proc_service interface. This
  43 adds Pgrab__ and some missing stuff. We hide the difference b/w live process and core
  44 file by this interface.
  45 
  46 1. pthread_id unique in both NPTL & LinuxThreads. We store this in
  47 OSThread::_pthread_id in JVM code.
  48 
  49 2. All threads see the same pid when they call getpid() under NPTL.
  50 Threads receive different pid under LinuxThreads. We used to save the result of
  51 ::getpid() call in OSThread::_thread_id. This way uniqueness of OSThread::_thread_id
  52 was lost under NPTL. Now, we store the result of ::gettid() call in
  53 OSThread::_thread_id. Because gettid returns actual pid of thread (lwp id), this is

   1 /*
   2  * Copyright (c) 2003, 2015, 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  *
  23  */
  24 
  25 #ifndef _LIBPROC_H_
  26 #define _LIBPROC_H_
  27 
  28 #include <jni.h>
  29 #include <unistd.h>
  30 #include <stdint.h>
  31 #include "proc_service.h"
  32 
  33 #ifdef ALT_SASRCDIR
  34 #include "libproc_md.h"
  35 #endif
  36 
  37 #include <sys/ptrace.h>
  38 
  39 /************************************************************************************
  40 
  41 0. This is very minimal subset of Solaris libproc just enough for current application.
  42 Please note that the bulk of the functionality is from proc_service interface. This
  43 adds Pgrab__ and some missing stuff. We hide the difference b/w live process and core
  44 file by this interface.
  45 
  46 1. pthread_id unique in both NPTL & LinuxThreads. We store this in
  47 OSThread::_pthread_id in JVM code.
  48 
  49 2. All threads see the same pid when they call getpid() under NPTL.
  50 Threads receive different pid under LinuxThreads. We used to save the result of
  51 ::getpid() call in OSThread::_thread_id. This way uniqueness of OSThread::_thread_id
  52 was lost under NPTL. Now, we store the result of ::gettid() call in
  53 OSThread::_thread_id. Because gettid returns actual pid of thread (lwp id), this is