Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright 2003-2007 Sun Microsystems, Inc.  All Rights Reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * under the terms of the GNU General Public License version 2 only, as

  * published by the Free Software Foundation.

  *

  * This code is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

  * CA 95054 USA or visit www.sun.com if you need additional information or

  * have any questions.

  *

  */

 #ifndef _LIBPROC_H_

 #define _LIBPROC_H_

 #include <unistd.h>

 #include <stdint.h>

 #include "proc_service.h"

 #if defined(sparc) || defined(sparcv9)

 /*

   If _LP64 is defined ptrace.h should be taken from /usr/include/asm-sparc64

   otherwise it should be from /usr/include/asm-sparc

   These two files define pt_regs structure differently

 */

 #ifdef _LP64

 #include "asm-sparc64/ptrace.h"

 #else

 #include "asm-sparc/ptrace.h"

 #endif

 #endif //sparc or sparcv9

 /************************************************************************************

 0. This is very minimal subset of Solaris libproc just enough for current application.

 Please note that the bulk of the functionality is from proc_service interface. This

 adds Pgrab__ and some missing stuff. We hide the difference b/w live process and core

 file by this interface.

 1. pthread_id unique in both NPTL & LinuxThreads. We store this in

 OSThread::_pthread_id in JVM code.

 2. All threads see the same pid when they call getpid() under NPTL.

 Threads receive different pid under LinuxThreads. We used to save the result of

 ::getpid() call in OSThread::_thread_id. This way uniqueness of OSThread::_thread_id

 was lost under NPTL. Now, we store the result of ::gettid() call in

 OSThread::_thread_id. Because gettid returns actual pid of thread (lwp id), this is

 unique again. We therefore use OSThread::_thread_id as unique identifier.

 3. There is a unique LWP id under both thread libraries. libthread_db  maps pthread_id

 to its underlying lwp_id under both the thread libraries. thread_info.lwp_id stores

 lwp_id of the thread. The lwp id is nothing but the actual pid of clone'd processes. But

 unfortunately libthread_db does not work very well for core dumps. So, we get pthread_id

 only for processes. For core dumps, we don't use libthread_db at all (like gdb).

 4. ptrace operates on this LWP id under both the thread libraries. When we say 'pid' for

 ptrace call, we refer to lwp_id of the thread.

 5. for core file, we parse ELF files and read data from them. For processes we  use

 combination of ptrace and /proc calls.

 *************************************************************************************/

 #ifdef ia64

 struct user_regs_struct {

 /* copied from user.h which doesn't define this in a struct */

 #define IA64_REG_COUNT (EF_SIZE/8+32)   /* integer and fp regs */

 unsigned long   regs[IA64_REG_COUNT];     /* integer and fp regs */

 };

 #endif

 #if defined(sparc)  || defined(sparcv9)

 #define user_regs_struct  pt_regs

 #endif

 // This C bool type must be int for compatibility with Linux calls and

 // it would be a mistake to equivalence it to C++ bool on many platforms

 typedef int bool;

 #define true  1

 #define false 0

 struct ps_prochandle;

 // attach to a process

 struct ps_prochandle* Pgrab(pid_t pid);

 // attach to a core dump

 struct ps_prochandle* Pgrab_core(const char* execfile, const char* corefile);

 // release a process or core

 void Prelease(struct ps_prochandle* ph);

 // functions not directly available in Solaris libproc

 // initialize libproc (call this only once per app)

 // pass true to make library verbose

 bool init_libproc(bool verbose);

 // get number of threads

 int get_num_threads(struct ps_prochandle* ph);

 // get lwp_id of n'th thread

 lwpid_t get_lwp_id(struct ps_prochandle* ph, int index);

 // get regs for a given lwp

 bool get_lwp_regs(struct ps_prochandle* ph, lwpid_t lid, struct user_regs_struct* regs);

 // get number of shared objects

 int get_num_libs(struct ps_prochandle* ph);

 // get name of n'th lib

 const char* get_lib_name(struct ps_prochandle* ph, int index);

 // get base of lib

 uintptr_t get_lib_base(struct ps_prochandle* ph, int index);

 // returns true if given library is found in lib list

 bool find_lib(struct ps_prochandle* ph, const char *lib_name);

 // symbol lookup

 uintptr_t lookup_symbol(struct ps_prochandle* ph,  const char* object_name,

                        const char* sym_name);

 // address->nearest symbol lookup. return NULL for no symbol

 const char* symbol_for_pc(struct ps_prochandle* ph, uintptr_t addr, uintptr_t* poffset);

 #endif //__LIBPROC_H_