Mercurial > hg > graal-compiler
view agent/src/os/linux/libproc.h @ 100:c7c777385a15
6667042: PrintAssembly option does not work without special plugin
Summary: remove old private plugin interface, simplify, rework old plugin to use unchanged Gnu sources
Reviewed-by: kvn, rasbold
author | jrose |
---|---|
date | Wed, 02 Apr 2008 12:09:59 -0700 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
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/* * 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_