1 /* 2 * Copyright 2003-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25 #ifndef _LIBPROC_H_ 26 #define _LIBPROC_H_ 27 28 #include <unistd.h> 29 #include <stdint.h> 30 #include "proc_service.h" 31 32 #if defined(sparc) || defined(sparcv9) 33 /* 34 If _LP64 is defined ptrace.h should be taken from /usr/include/asm-sparc64 35 otherwise it should be from /usr/include/asm-sparc 36 These two files define pt_regs structure differently 37 */ 38 #ifdef _LP64 39 #include "asm-sparc64/ptrace.h" 40 #else 41 #include "asm-sparc/ptrace.h" 42 #endif 43 44 #endif //sparc or sparcv9 45 46 /************************************************************************************ 47 48 0. This is very minimal subset of Solaris libproc just enough for current application. 49 Please note that the bulk of the functionality is from proc_service interface. This 50 adds Pgrab__ and some missing stuff. We hide the difference b/w live process and core 51 file by this interface. 52 53 1. pthread_id unique in both NPTL & LinuxThreads. We store this in 54 OSThread::_pthread_id in JVM code. 55 56 2. All threads see the same pid when they call getpid() under NPTL. 57 Threads receive different pid under LinuxThreads. We used to save the result of 58 ::getpid() call in OSThread::_thread_id. This way uniqueness of OSThread::_thread_id 59 was lost under NPTL. Now, we store the result of ::gettid() call in 60 OSThread::_thread_id. Because gettid returns actual pid of thread (lwp id), this is 61 unique again. We therefore use OSThread::_thread_id as unique identifier. 62 63 3. There is a unique LWP id under both thread libraries. libthread_db maps pthread_id 64 to its underlying lwp_id under both the thread libraries. thread_info.lwp_id stores 65 lwp_id of the thread. The lwp id is nothing but the actual pid of clone'd processes. But 66 unfortunately libthread_db does not work very well for core dumps. So, we get pthread_id 67 only for processes. For core dumps, we don't use libthread_db at all (like gdb). 68 69 4. ptrace operates on this LWP id under both the thread libraries. When we say 'pid' for 70 ptrace call, we refer to lwp_id of the thread. 71 72 5. for core file, we parse ELF files and read data from them. For processes we use 73 combination of ptrace and /proc calls. 74 75 *************************************************************************************/ 76 77 #ifdef ia64 78 struct user_regs_struct { 79 /* copied from user.h which doesn't define this in a struct */ 80 81 #define IA64_REG_COUNT (EF_SIZE/8+32) /* integer and fp regs */ 82 unsigned long regs[IA64_REG_COUNT]; /* integer and fp regs */ 83 }; 84 #endif 85 86 #if defined(sparc) || defined(sparcv9) 87 #define user_regs_struct pt_regs 88 #endif 89 90 // This C bool type must be int for compatibility with Linux calls and 91 // it would be a mistake to equivalence it to C++ bool on many platforms 92 93 typedef int bool; 94 #define true 1 95 #define false 0 96 97 struct ps_prochandle; 98 99 // attach to a process 100 struct ps_prochandle* Pgrab(pid_t pid); 101 102 // attach to a core dump 103 struct ps_prochandle* Pgrab_core(const char* execfile, const char* corefile); 104 105 // release a process or core 106 void Prelease(struct ps_prochandle* ph); 107 108 // functions not directly available in Solaris libproc 109 110 // initialize libproc (call this only once per app) 111 // pass true to make library verbose 112 bool init_libproc(bool verbose); 113 114 // get number of threads 115 int get_num_threads(struct ps_prochandle* ph); 116 117 // get lwp_id of n'th thread 118 lwpid_t get_lwp_id(struct ps_prochandle* ph, int index); 119 120 // get regs for a given lwp 121 bool get_lwp_regs(struct ps_prochandle* ph, lwpid_t lid, struct user_regs_struct* regs); 122 123 // get number of shared objects 124 int get_num_libs(struct ps_prochandle* ph); 125 126 // get name of n'th lib 127 const char* get_lib_name(struct ps_prochandle* ph, int index); 128 129 // get base of lib 130 uintptr_t get_lib_base(struct ps_prochandle* ph, int index); 131 132 // returns true if given library is found in lib list 133 bool find_lib(struct ps_prochandle* ph, const char *lib_name); 134 135 // symbol lookup 136 uintptr_t lookup_symbol(struct ps_prochandle* ph, const char* object_name, 137 const char* sym_name); 138 139 // address->nearest symbol lookup. return NULL for no symbol 140 const char* symbol_for_pc(struct ps_prochandle* ph, uintptr_t addr, uintptr_t* poffset); 141 142 #endif //__LIBPROC_H_