10565
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/*
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* Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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// no precompiled headers
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#include "assembler_x86.inline.hpp"
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#include "classfile/classLoader.hpp"
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#include "classfile/systemDictionary.hpp"
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#include "classfile/vmSymbols.hpp"
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#include "code/icBuffer.hpp"
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#include "code/vtableStubs.hpp"
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#include "interpreter/interpreter.hpp"
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#include "jvm_bsd.h"
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#include "memory/allocation.inline.hpp"
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#include "mutex_bsd.inline.hpp"
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#include "nativeInst_x86.hpp"
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#include "os_share_bsd.hpp"
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#include "prims/jniFastGetField.hpp"
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#include "prims/jvm.h"
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#include "prims/jvm_misc.hpp"
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#include "runtime/arguments.hpp"
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#include "runtime/extendedPC.hpp"
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#include "runtime/frame.inline.hpp"
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#include "runtime/interfaceSupport.hpp"
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#include "runtime/java.hpp"
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#include "runtime/javaCalls.hpp"
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#include "runtime/mutexLocker.hpp"
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#include "runtime/osThread.hpp"
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#include "runtime/sharedRuntime.hpp"
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#include "runtime/stubRoutines.hpp"
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#include "runtime/timer.hpp"
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#include "thread_bsd.inline.hpp"
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#include "utilities/events.hpp"
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#include "utilities/vmError.hpp"
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#ifdef COMPILER1
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#include "c1/c1_Runtime1.hpp"
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#endif
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#ifdef COMPILER2
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#include "opto/runtime.hpp"
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#endif
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// put OS-includes here
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# include <sys/types.h>
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# include <sys/mman.h>
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# include <pthread.h>
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# include <signal.h>
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# include <errno.h>
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# include <dlfcn.h>
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# include <stdlib.h>
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# include <stdio.h>
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# include <unistd.h>
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# include <sys/resource.h>
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# include <pthread.h>
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# include <sys/stat.h>
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# include <sys/time.h>
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# include <sys/utsname.h>
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# include <sys/socket.h>
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# include <sys/wait.h>
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# include <pwd.h>
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# include <poll.h>
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#ifndef __OpenBSD__
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# include <ucontext.h>
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#endif
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#if defined(_ALLBSD_SOURCE) && !defined(__APPLE__) && !defined(__NetBSD__)
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# include <pthread_np.h>
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#endif
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#ifdef AMD64
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#define SPELL_REG_SP "rsp"
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#define SPELL_REG_FP "rbp"
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#else
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#define SPELL_REG_SP "esp"
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#define SPELL_REG_FP "ebp"
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#endif // AMD64
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#ifdef __FreeBSD__
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# define context_trapno uc_mcontext.mc_trapno
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# ifdef AMD64
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# define context_pc uc_mcontext.mc_rip
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# define context_sp uc_mcontext.mc_rsp
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# define context_fp uc_mcontext.mc_rbp
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# define context_rip uc_mcontext.mc_rip
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# define context_rsp uc_mcontext.mc_rsp
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# define context_rbp uc_mcontext.mc_rbp
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# define context_rax uc_mcontext.mc_rax
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# define context_rbx uc_mcontext.mc_rbx
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# define context_rcx uc_mcontext.mc_rcx
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# define context_rdx uc_mcontext.mc_rdx
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# define context_rsi uc_mcontext.mc_rsi
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# define context_rdi uc_mcontext.mc_rdi
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# define context_r8 uc_mcontext.mc_r8
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# define context_r9 uc_mcontext.mc_r9
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# define context_r10 uc_mcontext.mc_r10
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# define context_r11 uc_mcontext.mc_r11
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# define context_r12 uc_mcontext.mc_r12
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# define context_r13 uc_mcontext.mc_r13
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# define context_r14 uc_mcontext.mc_r14
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# define context_r15 uc_mcontext.mc_r15
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# define context_flags uc_mcontext.mc_flags
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# define context_err uc_mcontext.mc_err
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# else
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# define context_pc uc_mcontext.mc_eip
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# define context_sp uc_mcontext.mc_esp
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# define context_fp uc_mcontext.mc_ebp
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# define context_eip uc_mcontext.mc_eip
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# define context_esp uc_mcontext.mc_esp
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# define context_eax uc_mcontext.mc_eax
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# define context_ebx uc_mcontext.mc_ebx
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# define context_ecx uc_mcontext.mc_ecx
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# define context_edx uc_mcontext.mc_edx
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# define context_ebp uc_mcontext.mc_ebp
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# define context_esi uc_mcontext.mc_esi
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# define context_edi uc_mcontext.mc_edi
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# define context_eflags uc_mcontext.mc_eflags
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# define context_trapno uc_mcontext.mc_trapno
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# endif
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#endif
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#ifdef __APPLE__
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# if __DARWIN_UNIX03 && (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)
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// 10.5 UNIX03 member name prefixes
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#define DU3_PREFIX(s, m) __ ## s.__ ## m
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# else
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#define DU3_PREFIX(s, m) s ## . ## m
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# endif
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# ifdef AMD64
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# define context_pc context_rip
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# define context_sp context_rsp
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# define context_fp context_rbp
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# define context_rip uc_mcontext->DU3_PREFIX(ss,rip)
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# define context_rsp uc_mcontext->DU3_PREFIX(ss,rsp)
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# define context_rax uc_mcontext->DU3_PREFIX(ss,rax)
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# define context_rbx uc_mcontext->DU3_PREFIX(ss,rbx)
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# define context_rcx uc_mcontext->DU3_PREFIX(ss,rcx)
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# define context_rdx uc_mcontext->DU3_PREFIX(ss,rdx)
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# define context_rbp uc_mcontext->DU3_PREFIX(ss,rbp)
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# define context_rsi uc_mcontext->DU3_PREFIX(ss,rsi)
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# define context_rdi uc_mcontext->DU3_PREFIX(ss,rdi)
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# define context_r8 uc_mcontext->DU3_PREFIX(ss,r8)
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# define context_r9 uc_mcontext->DU3_PREFIX(ss,r9)
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# define context_r10 uc_mcontext->DU3_PREFIX(ss,r10)
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# define context_r11 uc_mcontext->DU3_PREFIX(ss,r11)
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# define context_r12 uc_mcontext->DU3_PREFIX(ss,r12)
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# define context_r13 uc_mcontext->DU3_PREFIX(ss,r13)
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# define context_r14 uc_mcontext->DU3_PREFIX(ss,r14)
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# define context_r15 uc_mcontext->DU3_PREFIX(ss,r15)
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# define context_flags uc_mcontext->DU3_PREFIX(ss,rflags)
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# define context_trapno uc_mcontext->DU3_PREFIX(es,trapno)
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# define context_err uc_mcontext->DU3_PREFIX(es,err)
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# else
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# define context_pc context_eip
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# define context_sp context_esp
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# define context_fp context_ebp
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# define context_eip uc_mcontext->DU3_PREFIX(ss,eip)
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# define context_esp uc_mcontext->DU3_PREFIX(ss,esp)
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# define context_eax uc_mcontext->DU3_PREFIX(ss,eax)
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# define context_ebx uc_mcontext->DU3_PREFIX(ss,ebx)
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# define context_ecx uc_mcontext->DU3_PREFIX(ss,ecx)
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# define context_edx uc_mcontext->DU3_PREFIX(ss,edx)
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# define context_ebp uc_mcontext->DU3_PREFIX(ss,ebp)
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# define context_esi uc_mcontext->DU3_PREFIX(ss,esi)
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# define context_edi uc_mcontext->DU3_PREFIX(ss,edi)
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# define context_eflags uc_mcontext->DU3_PREFIX(ss,eflags)
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# define context_trapno uc_mcontext->DU3_PREFIX(es,trapno)
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# endif
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#endif
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#ifdef __OpenBSD__
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# define context_trapno sc_trapno
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# ifdef AMD64
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# define context_pc sc_rip
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# define context_sp sc_rsp
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# define context_fp sc_rbp
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# define context_rip sc_rip
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# define context_rsp sc_rsp
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# define context_rbp sc_rbp
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# define context_rax sc_rax
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# define context_rbx sc_rbx
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# define context_rcx sc_rcx
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# define context_rdx sc_rdx
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# define context_rsi sc_rsi
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# define context_rdi sc_rdi
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# define context_r8 sc_r8
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# define context_r9 sc_r9
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# define context_r10 sc_r10
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# define context_r11 sc_r11
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# define context_r12 sc_r12
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# define context_r13 sc_r13
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# define context_r14 sc_r14
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# define context_r15 sc_r15
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# define context_flags sc_rflags
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# define context_err sc_err
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# else
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# define context_pc sc_eip
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# define context_sp sc_esp
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# define context_fp sc_ebp
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# define context_eip sc_eip
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# define context_esp sc_esp
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# define context_eax sc_eax
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# define context_ebx sc_ebx
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# define context_ecx sc_ecx
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# define context_edx sc_edx
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# define context_ebp sc_ebp
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# define context_esi sc_esi
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# define context_edi sc_edi
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# define context_eflags sc_eflags
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# define context_trapno sc_trapno
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# endif
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#endif
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#ifdef __NetBSD__
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# define context_trapno uc_mcontext.__gregs[_REG_TRAPNO]
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# ifdef AMD64
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# define __register_t __greg_t
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# define context_pc uc_mcontext.__gregs[_REG_RIP]
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# define context_sp uc_mcontext.__gregs[_REG_URSP]
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# define context_fp uc_mcontext.__gregs[_REG_RBP]
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# define context_rip uc_mcontext.__gregs[_REG_RIP]
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# define context_rsp uc_mcontext.__gregs[_REG_URSP]
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# define context_rax uc_mcontext.__gregs[_REG_RAX]
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# define context_rbx uc_mcontext.__gregs[_REG_RBX]
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# define context_rcx uc_mcontext.__gregs[_REG_RCX]
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# define context_rdx uc_mcontext.__gregs[_REG_RDX]
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# define context_rbp uc_mcontext.__gregs[_REG_RBP]
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# define context_rsi uc_mcontext.__gregs[_REG_RSI]
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# define context_rdi uc_mcontext.__gregs[_REG_RDI]
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# define context_r8 uc_mcontext.__gregs[_REG_R8]
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# define context_r9 uc_mcontext.__gregs[_REG_R9]
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# define context_r10 uc_mcontext.__gregs[_REG_R10]
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# define context_r11 uc_mcontext.__gregs[_REG_R11]
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# define context_r12 uc_mcontext.__gregs[_REG_R12]
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# define context_r13 uc_mcontext.__gregs[_REG_R13]
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# define context_r14 uc_mcontext.__gregs[_REG_R14]
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# define context_r15 uc_mcontext.__gregs[_REG_R15]
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# define context_flags uc_mcontext.__gregs[_REG_RFL]
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# define context_err uc_mcontext.__gregs[_REG_ERR]
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# else
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# define context_pc uc_mcontext.__gregs[_REG_EIP]
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# define context_sp uc_mcontext.__gregs[_REG_UESP]
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# define context_fp uc_mcontext.__gregs[_REG_EBP]
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# define context_eip uc_mcontext.__gregs[_REG_EIP]
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# define context_esp uc_mcontext.__gregs[_REG_UESP]
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# define context_eax uc_mcontext.__gregs[_REG_EAX]
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# define context_ebx uc_mcontext.__gregs[_REG_EBX]
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# define context_ecx uc_mcontext.__gregs[_REG_ECX]
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# define context_edx uc_mcontext.__gregs[_REG_EDX]
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# define context_ebp uc_mcontext.__gregs[_REG_EBP]
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# define context_esi uc_mcontext.__gregs[_REG_ESI]
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# define context_edi uc_mcontext.__gregs[_REG_EDI]
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# define context_eflags uc_mcontext.__gregs[_REG_EFL]
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# define context_trapno uc_mcontext.__gregs[_REG_TRAPNO]
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# endif
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#endif
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address os::current_stack_pointer() {
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#ifdef SPARC_WORKS
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register void *esp;
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__asm__("mov %%"SPELL_REG_SP", %0":"=r"(esp));
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return (address) ((char*)esp + sizeof(long)*2);
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#else
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register void *esp __asm__ (SPELL_REG_SP);
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return (address) esp;
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#endif
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}
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char* os::non_memory_address_word() {
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// Must never look like an address returned by reserve_memory,
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// even in its subfields (as defined by the CPU immediate fields,
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// if the CPU splits constants across multiple instructions).
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return (char*) -1;
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}
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void os::initialize_thread() {
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// Nothing to do.
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}
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address os::Bsd::ucontext_get_pc(ucontext_t * uc) {
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return (address)uc->context_pc;
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}
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intptr_t* os::Bsd::ucontext_get_sp(ucontext_t * uc) {
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return (intptr_t*)uc->context_sp;
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}
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intptr_t* os::Bsd::ucontext_get_fp(ucontext_t * uc) {
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return (intptr_t*)uc->context_fp;
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}
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// For Forte Analyzer AsyncGetCallTrace profiling support - thread
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// is currently interrupted by SIGPROF.
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// os::Solaris::fetch_frame_from_ucontext() tries to skip nested signal
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// frames. Currently we don't do that on Bsd, so it's the same as
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// os::fetch_frame_from_context().
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ExtendedPC os::Bsd::fetch_frame_from_ucontext(Thread* thread,
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ucontext_t* uc, intptr_t** ret_sp, intptr_t** ret_fp) {
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assert(thread != NULL, "just checking");
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assert(ret_sp != NULL, "just checking");
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assert(ret_fp != NULL, "just checking");
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return os::fetch_frame_from_context(uc, ret_sp, ret_fp);
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}
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ExtendedPC os::fetch_frame_from_context(void* ucVoid,
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intptr_t** ret_sp, intptr_t** ret_fp) {
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ExtendedPC epc;
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ucontext_t* uc = (ucontext_t*)ucVoid;
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if (uc != NULL) {
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epc = ExtendedPC(os::Bsd::ucontext_get_pc(uc));
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if (ret_sp) *ret_sp = os::Bsd::ucontext_get_sp(uc);
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if (ret_fp) *ret_fp = os::Bsd::ucontext_get_fp(uc);
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} else {
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// construct empty ExtendedPC for return value checking
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epc = ExtendedPC(NULL);
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if (ret_sp) *ret_sp = (intptr_t *)NULL;
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if (ret_fp) *ret_fp = (intptr_t *)NULL;
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}
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return epc;
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}
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frame os::fetch_frame_from_context(void* ucVoid) {
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intptr_t* sp;
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intptr_t* fp;
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ExtendedPC epc = fetch_frame_from_context(ucVoid, &sp, &fp);
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return frame(sp, fp, epc.pc());
|
|
352 |
}
|
|
353 |
|
|
354 |
// By default, gcc always save frame pointer (%ebp/%rbp) on stack. It may get
|
|
355 |
// turned off by -fomit-frame-pointer,
|
|
356 |
frame os::get_sender_for_C_frame(frame* fr) {
|
|
357 |
return frame(fr->sender_sp(), fr->link(), fr->sender_pc());
|
|
358 |
}
|
|
359 |
|
|
360 |
intptr_t* _get_previous_fp() {
|
|
361 |
#ifdef SPARC_WORKS
|
|
362 |
register intptr_t **ebp;
|
|
363 |
__asm__("mov %%"SPELL_REG_FP", %0":"=r"(ebp));
|
|
364 |
#else
|
|
365 |
register intptr_t **ebp __asm__ (SPELL_REG_FP);
|
|
366 |
#endif
|
|
367 |
return (intptr_t*) *ebp; // we want what it points to.
|
|
368 |
}
|
|
369 |
|
|
370 |
|
|
371 |
frame os::current_frame() {
|
|
372 |
intptr_t* fp = _get_previous_fp();
|
|
373 |
frame myframe((intptr_t*)os::current_stack_pointer(),
|
|
374 |
(intptr_t*)fp,
|
|
375 |
CAST_FROM_FN_PTR(address, os::current_frame));
|
|
376 |
if (os::is_first_C_frame(&myframe)) {
|
|
377 |
// stack is not walkable
|
|
378 |
return frame(NULL, NULL, NULL);
|
|
379 |
} else {
|
|
380 |
return os::get_sender_for_C_frame(&myframe);
|
|
381 |
}
|
|
382 |
}
|
|
383 |
|
|
384 |
// Utility functions
|
|
385 |
|
|
386 |
// From IA32 System Programming Guide
|
|
387 |
enum {
|
|
388 |
trap_page_fault = 0xE
|
|
389 |
};
|
|
390 |
|
|
391 |
extern "C" void Fetch32PFI () ;
|
|
392 |
extern "C" void Fetch32Resume () ;
|
|
393 |
#ifdef AMD64
|
|
394 |
extern "C" void FetchNPFI () ;
|
|
395 |
extern "C" void FetchNResume () ;
|
|
396 |
#endif // AMD64
|
|
397 |
|
|
398 |
extern "C" JNIEXPORT int
|
|
399 |
JVM_handle_bsd_signal(int sig,
|
|
400 |
siginfo_t* info,
|
|
401 |
void* ucVoid,
|
|
402 |
int abort_if_unrecognized) {
|
|
403 |
ucontext_t* uc = (ucontext_t*) ucVoid;
|
|
404 |
|
|
405 |
Thread* t = ThreadLocalStorage::get_thread_slow();
|
|
406 |
|
|
407 |
SignalHandlerMark shm(t);
|
|
408 |
|
|
409 |
// Note: it's not uncommon that JNI code uses signal/sigset to install
|
|
410 |
// then restore certain signal handler (e.g. to temporarily block SIGPIPE,
|
|
411 |
// or have a SIGILL handler when detecting CPU type). When that happens,
|
|
412 |
// JVM_handle_bsd_signal() might be invoked with junk info/ucVoid. To
|
|
413 |
// avoid unnecessary crash when libjsig is not preloaded, try handle signals
|
|
414 |
// that do not require siginfo/ucontext first.
|
|
415 |
|
|
416 |
if (sig == SIGPIPE || sig == SIGXFSZ) {
|
|
417 |
// allow chained handler to go first
|
|
418 |
if (os::Bsd::chained_handler(sig, info, ucVoid)) {
|
|
419 |
return true;
|
|
420 |
} else {
|
|
421 |
if (PrintMiscellaneous && (WizardMode || Verbose)) {
|
|
422 |
char buf[64];
|
|
423 |
warning("Ignoring %s - see bugs 4229104 or 646499219",
|
|
424 |
os::exception_name(sig, buf, sizeof(buf)));
|
|
425 |
}
|
|
426 |
return true;
|
|
427 |
}
|
|
428 |
}
|
|
429 |
|
|
430 |
JavaThread* thread = NULL;
|
|
431 |
VMThread* vmthread = NULL;
|
|
432 |
if (os::Bsd::signal_handlers_are_installed) {
|
|
433 |
if (t != NULL ){
|
|
434 |
if(t->is_Java_thread()) {
|
|
435 |
thread = (JavaThread*)t;
|
|
436 |
}
|
|
437 |
else if(t->is_VM_thread()){
|
|
438 |
vmthread = (VMThread *)t;
|
|
439 |
}
|
|
440 |
}
|
|
441 |
}
|
|
442 |
/*
|
|
443 |
NOTE: does not seem to work on bsd.
|
|
444 |
if (info == NULL || info->si_code <= 0 || info->si_code == SI_NOINFO) {
|
|
445 |
// can't decode this kind of signal
|
|
446 |
info = NULL;
|
|
447 |
} else {
|
|
448 |
assert(sig == info->si_signo, "bad siginfo");
|
|
449 |
}
|
|
450 |
*/
|
|
451 |
// decide if this trap can be handled by a stub
|
|
452 |
address stub = NULL;
|
|
453 |
|
|
454 |
address pc = NULL;
|
|
455 |
|
|
456 |
//%note os_trap_1
|
|
457 |
if (info != NULL && uc != NULL && thread != NULL) {
|
|
458 |
pc = (address) os::Bsd::ucontext_get_pc(uc);
|
|
459 |
|
|
460 |
if (pc == (address) Fetch32PFI) {
|
|
461 |
uc->context_pc = intptr_t(Fetch32Resume) ;
|
|
462 |
return 1 ;
|
|
463 |
}
|
|
464 |
#ifdef AMD64
|
|
465 |
if (pc == (address) FetchNPFI) {
|
|
466 |
uc->context_pc = intptr_t (FetchNResume) ;
|
|
467 |
return 1 ;
|
|
468 |
}
|
|
469 |
#endif // AMD64
|
|
470 |
|
|
471 |
// Handle ALL stack overflow variations here
|
|
472 |
if (sig == SIGSEGV || sig == SIGBUS) {
|
|
473 |
address addr = (address) info->si_addr;
|
|
474 |
|
|
475 |
// check if fault address is within thread stack
|
|
476 |
if (addr < thread->stack_base() &&
|
|
477 |
addr >= thread->stack_base() - thread->stack_size()) {
|
|
478 |
// stack overflow
|
|
479 |
if (thread->in_stack_yellow_zone(addr)) {
|
|
480 |
thread->disable_stack_yellow_zone();
|
|
481 |
if (thread->thread_state() == _thread_in_Java) {
|
|
482 |
// Throw a stack overflow exception. Guard pages will be reenabled
|
|
483 |
// while unwinding the stack.
|
|
484 |
stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::STACK_OVERFLOW);
|
|
485 |
} else {
|
|
486 |
// Thread was in the vm or native code. Return and try to finish.
|
|
487 |
return 1;
|
|
488 |
}
|
|
489 |
} else if (thread->in_stack_red_zone(addr)) {
|
|
490 |
// Fatal red zone violation. Disable the guard pages and fall through
|
|
491 |
// to handle_unexpected_exception way down below.
|
|
492 |
thread->disable_stack_red_zone();
|
|
493 |
tty->print_raw_cr("An irrecoverable stack overflow has occurred.");
|
|
494 |
#ifndef _ALLBSD_SOURCE
|
|
495 |
} else {
|
|
496 |
// Accessing stack address below sp may cause SEGV if current
|
|
497 |
// thread has MAP_GROWSDOWN stack. This should only happen when
|
|
498 |
// current thread was created by user code with MAP_GROWSDOWN flag
|
|
499 |
// and then attached to VM. See notes in os_bsd.cpp.
|
|
500 |
if (thread->osthread()->expanding_stack() == 0) {
|
|
501 |
thread->osthread()->set_expanding_stack();
|
|
502 |
if (os::Bsd::manually_expand_stack(thread, addr)) {
|
|
503 |
thread->osthread()->clear_expanding_stack();
|
|
504 |
return 1;
|
|
505 |
}
|
|
506 |
thread->osthread()->clear_expanding_stack();
|
|
507 |
} else {
|
|
508 |
fatal("recursive segv. expanding stack.");
|
|
509 |
}
|
|
510 |
#endif
|
|
511 |
}
|
|
512 |
}
|
|
513 |
}
|
|
514 |
|
|
515 |
if (thread->thread_state() == _thread_in_Java) {
|
|
516 |
// Java thread running in Java code => find exception handler if any
|
|
517 |
// a fault inside compiled code, the interpreter, or a stub
|
|
518 |
|
|
519 |
if ((sig == SIGSEGV || sig == SIGBUS) && os::is_poll_address((address)info->si_addr)) {
|
|
520 |
stub = SharedRuntime::get_poll_stub(pc);
|
|
521 |
#if defined(__APPLE__) && !defined(AMD64)
|
|
522 |
// 32-bit Darwin reports a SIGBUS for nearly all memory access exceptions.
|
|
523 |
// Catching SIGBUS here prevents the implicit SIGBUS NULL check below from
|
|
524 |
// being called, so only do so if the implicit NULL check is not necessary.
|
|
525 |
} else if (sig == SIGBUS && MacroAssembler::needs_explicit_null_check((int)info->si_addr)) {
|
|
526 |
#else
|
|
527 |
} else if (sig == SIGBUS /* && info->si_code == BUS_OBJERR */) {
|
|
528 |
#endif
|
|
529 |
// BugId 4454115: A read from a MappedByteBuffer can fault
|
|
530 |
// here if the underlying file has been truncated.
|
|
531 |
// Do not crash the VM in such a case.
|
|
532 |
CodeBlob* cb = CodeCache::find_blob_unsafe(pc);
|
|
533 |
nmethod* nm = cb->is_nmethod() ? (nmethod*)cb : NULL;
|
|
534 |
if (nm != NULL && nm->has_unsafe_access()) {
|
|
535 |
stub = StubRoutines::handler_for_unsafe_access();
|
|
536 |
}
|
|
537 |
}
|
|
538 |
else
|
|
539 |
|
|
540 |
#ifdef AMD64
|
|
541 |
if (sig == SIGFPE &&
|
|
542 |
(info->si_code == FPE_INTDIV || info->si_code == FPE_FLTDIV)) {
|
|
543 |
stub =
|
|
544 |
SharedRuntime::
|
|
545 |
continuation_for_implicit_exception(thread,
|
|
546 |
pc,
|
|
547 |
SharedRuntime::
|
|
548 |
IMPLICIT_DIVIDE_BY_ZERO);
|
|
549 |
#ifdef __APPLE__
|
|
550 |
} else if (sig == SIGFPE && info->si_code == FPE_NOOP) {
|
|
551 |
int op = pc[0];
|
|
552 |
|
|
553 |
// Skip REX
|
|
554 |
if ((pc[0] & 0xf0) == 0x40) {
|
|
555 |
op = pc[1];
|
|
556 |
} else {
|
|
557 |
op = pc[0];
|
|
558 |
}
|
|
559 |
|
|
560 |
// Check for IDIV
|
|
561 |
if (op == 0xF7) {
|
|
562 |
stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime:: IMPLICIT_DIVIDE_BY_ZERO);
|
|
563 |
} else {
|
|
564 |
// TODO: handle more cases if we are using other x86 instructions
|
|
565 |
// that can generate SIGFPE signal.
|
|
566 |
tty->print_cr("unknown opcode 0x%X with SIGFPE.", op);
|
|
567 |
fatal("please update this code.");
|
|
568 |
}
|
|
569 |
#endif /* __APPLE__ */
|
|
570 |
|
|
571 |
#else
|
|
572 |
if (sig == SIGFPE /* && info->si_code == FPE_INTDIV */) {
|
|
573 |
// HACK: si_code does not work on bsd 2.2.12-20!!!
|
|
574 |
int op = pc[0];
|
|
575 |
if (op == 0xDB) {
|
|
576 |
// FIST
|
|
577 |
// TODO: The encoding of D2I in i486.ad can cause an exception
|
|
578 |
// prior to the fist instruction if there was an invalid operation
|
|
579 |
// pending. We want to dismiss that exception. From the win_32
|
|
580 |
// side it also seems that if it really was the fist causing
|
|
581 |
// the exception that we do the d2i by hand with different
|
|
582 |
// rounding. Seems kind of weird.
|
|
583 |
// NOTE: that we take the exception at the NEXT floating point instruction.
|
|
584 |
assert(pc[0] == 0xDB, "not a FIST opcode");
|
|
585 |
assert(pc[1] == 0x14, "not a FIST opcode");
|
|
586 |
assert(pc[2] == 0x24, "not a FIST opcode");
|
|
587 |
return true;
|
|
588 |
} else if (op == 0xF7) {
|
|
589 |
// IDIV
|
|
590 |
stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_DIVIDE_BY_ZERO);
|
|
591 |
} else {
|
|
592 |
// TODO: handle more cases if we are using other x86 instructions
|
|
593 |
// that can generate SIGFPE signal on bsd.
|
|
594 |
tty->print_cr("unknown opcode 0x%X with SIGFPE.", op);
|
|
595 |
fatal("please update this code.");
|
|
596 |
}
|
|
597 |
#endif // AMD64
|
|
598 |
} else if ((sig == SIGSEGV || sig == SIGBUS) &&
|
|
599 |
!MacroAssembler::needs_explicit_null_check((intptr_t)info->si_addr)) {
|
|
600 |
// Determination of interpreter/vtable stub/compiled code null exception
|
|
601 |
stub = SharedRuntime::continuation_for_implicit_exception(thread, pc, SharedRuntime::IMPLICIT_NULL);
|
|
602 |
}
|
|
603 |
} else if (thread->thread_state() == _thread_in_vm &&
|
|
604 |
sig == SIGBUS && /* info->si_code == BUS_OBJERR && */
|
|
605 |
thread->doing_unsafe_access()) {
|
|
606 |
stub = StubRoutines::handler_for_unsafe_access();
|
|
607 |
}
|
|
608 |
|
|
609 |
// jni_fast_Get<Primitive>Field can trap at certain pc's if a GC kicks in
|
|
610 |
// and the heap gets shrunk before the field access.
|
|
611 |
if ((sig == SIGSEGV) || (sig == SIGBUS)) {
|
|
612 |
address addr = JNI_FastGetField::find_slowcase_pc(pc);
|
|
613 |
if (addr != (address)-1) {
|
|
614 |
stub = addr;
|
|
615 |
}
|
|
616 |
}
|
|
617 |
|
|
618 |
// Check to see if we caught the safepoint code in the
|
|
619 |
// process of write protecting the memory serialization page.
|
|
620 |
// It write enables the page immediately after protecting it
|
|
621 |
// so we can just return to retry the write.
|
|
622 |
if ((sig == SIGSEGV || sig == SIGBUS) &&
|
|
623 |
os::is_memory_serialize_page(thread, (address) info->si_addr)) {
|
|
624 |
// Block current thread until the memory serialize page permission restored.
|
|
625 |
os::block_on_serialize_page_trap();
|
|
626 |
return true;
|
|
627 |
}
|
|
628 |
}
|
|
629 |
|
|
630 |
#ifndef AMD64
|
|
631 |
// Execution protection violation
|
|
632 |
//
|
|
633 |
// This should be kept as the last step in the triage. We don't
|
|
634 |
// have a dedicated trap number for a no-execute fault, so be
|
|
635 |
// conservative and allow other handlers the first shot.
|
|
636 |
//
|
|
637 |
// Note: We don't test that info->si_code == SEGV_ACCERR here.
|
|
638 |
// this si_code is so generic that it is almost meaningless; and
|
|
639 |
// the si_code for this condition may change in the future.
|
|
640 |
// Furthermore, a false-positive should be harmless.
|
|
641 |
if (UnguardOnExecutionViolation > 0 &&
|
|
642 |
(sig == SIGSEGV || sig == SIGBUS) &&
|
|
643 |
uc->context_trapno == trap_page_fault) {
|
|
644 |
int page_size = os::vm_page_size();
|
|
645 |
address addr = (address) info->si_addr;
|
|
646 |
address pc = os::Bsd::ucontext_get_pc(uc);
|
|
647 |
// Make sure the pc and the faulting address are sane.
|
|
648 |
//
|
|
649 |
// If an instruction spans a page boundary, and the page containing
|
|
650 |
// the beginning of the instruction is executable but the following
|
|
651 |
// page is not, the pc and the faulting address might be slightly
|
|
652 |
// different - we still want to unguard the 2nd page in this case.
|
|
653 |
//
|
|
654 |
// 15 bytes seems to be a (very) safe value for max instruction size.
|
|
655 |
bool pc_is_near_addr =
|
|
656 |
(pointer_delta((void*) addr, (void*) pc, sizeof(char)) < 15);
|
|
657 |
bool instr_spans_page_boundary =
|
|
658 |
(align_size_down((intptr_t) pc ^ (intptr_t) addr,
|
|
659 |
(intptr_t) page_size) > 0);
|
|
660 |
|
|
661 |
if (pc == addr || (pc_is_near_addr && instr_spans_page_boundary)) {
|
|
662 |
static volatile address last_addr =
|
|
663 |
(address) os::non_memory_address_word();
|
|
664 |
|
|
665 |
// In conservative mode, don't unguard unless the address is in the VM
|
|
666 |
if (addr != last_addr &&
|
|
667 |
(UnguardOnExecutionViolation > 1 || os::address_is_in_vm(addr))) {
|
|
668 |
|
|
669 |
// Set memory to RWX and retry
|
|
670 |
address page_start =
|
|
671 |
(address) align_size_down((intptr_t) addr, (intptr_t) page_size);
|
|
672 |
bool res = os::protect_memory((char*) page_start, page_size,
|
|
673 |
os::MEM_PROT_RWX);
|
|
674 |
|
|
675 |
if (PrintMiscellaneous && Verbose) {
|
|
676 |
char buf[256];
|
|
677 |
jio_snprintf(buf, sizeof(buf), "Execution protection violation "
|
|
678 |
"at " INTPTR_FORMAT
|
|
679 |
", unguarding " INTPTR_FORMAT ": %s, errno=%d", addr,
|
|
680 |
page_start, (res ? "success" : "failed"), errno);
|
|
681 |
tty->print_raw_cr(buf);
|
|
682 |
}
|
|
683 |
stub = pc;
|
|
684 |
|
|
685 |
// Set last_addr so if we fault again at the same address, we don't end
|
|
686 |
// up in an endless loop.
|
|
687 |
//
|
|
688 |
// There are two potential complications here. Two threads trapping at
|
|
689 |
// the same address at the same time could cause one of the threads to
|
|
690 |
// think it already unguarded, and abort the VM. Likely very rare.
|
|
691 |
//
|
|
692 |
// The other race involves two threads alternately trapping at
|
|
693 |
// different addresses and failing to unguard the page, resulting in
|
|
694 |
// an endless loop. This condition is probably even more unlikely than
|
|
695 |
// the first.
|
|
696 |
//
|
|
697 |
// Although both cases could be avoided by using locks or thread local
|
|
698 |
// last_addr, these solutions are unnecessary complication: this
|
|
699 |
// handler is a best-effort safety net, not a complete solution. It is
|
|
700 |
// disabled by default and should only be used as a workaround in case
|
|
701 |
// we missed any no-execute-unsafe VM code.
|
|
702 |
|
|
703 |
last_addr = addr;
|
|
704 |
}
|
|
705 |
}
|
|
706 |
}
|
|
707 |
#endif // !AMD64
|
|
708 |
|
|
709 |
if (stub != NULL) {
|
|
710 |
// save all thread context in case we need to restore it
|
|
711 |
if (thread != NULL) thread->set_saved_exception_pc(pc);
|
|
712 |
|
|
713 |
uc->context_pc = (intptr_t)stub;
|
|
714 |
return true;
|
|
715 |
}
|
|
716 |
|
|
717 |
// signal-chaining
|
|
718 |
if (os::Bsd::chained_handler(sig, info, ucVoid)) {
|
|
719 |
return true;
|
|
720 |
}
|
|
721 |
|
|
722 |
if (!abort_if_unrecognized) {
|
|
723 |
// caller wants another chance, so give it to him
|
|
724 |
return false;
|
|
725 |
}
|
|
726 |
|
|
727 |
if (pc == NULL && uc != NULL) {
|
|
728 |
pc = os::Bsd::ucontext_get_pc(uc);
|
|
729 |
}
|
|
730 |
|
|
731 |
// unmask current signal
|
|
732 |
sigset_t newset;
|
|
733 |
sigemptyset(&newset);
|
|
734 |
sigaddset(&newset, sig);
|
|
735 |
sigprocmask(SIG_UNBLOCK, &newset, NULL);
|
|
736 |
|
|
737 |
VMError err(t, sig, pc, info, ucVoid);
|
|
738 |
err.report_and_die();
|
|
739 |
|
|
740 |
ShouldNotReachHere();
|
|
741 |
}
|
|
742 |
|
|
743 |
#ifdef _ALLBSD_SOURCE
|
|
744 |
// From solaris_i486.s ported to bsd_i486.s
|
|
745 |
extern "C" void fixcw();
|
|
746 |
#endif
|
|
747 |
|
|
748 |
void os::Bsd::init_thread_fpu_state(void) {
|
|
749 |
#ifndef AMD64
|
|
750 |
# ifdef _ALLBSD_SOURCE
|
|
751 |
// Set fpu to 53 bit precision. This happens too early to use a stub.
|
|
752 |
fixcw();
|
|
753 |
# else
|
|
754 |
// set fpu to 53 bit precision
|
|
755 |
set_fpu_control_word(0x27f);
|
|
756 |
# endif
|
|
757 |
#endif // !AMD64
|
|
758 |
}
|
|
759 |
|
|
760 |
#ifndef _ALLBSD_SOURCE
|
|
761 |
int os::Bsd::get_fpu_control_word(void) {
|
|
762 |
#ifdef AMD64
|
|
763 |
return 0;
|
|
764 |
#else
|
|
765 |
int fpu_control;
|
|
766 |
_FPU_GETCW(fpu_control);
|
|
767 |
return fpu_control & 0xffff;
|
|
768 |
#endif // AMD64
|
|
769 |
}
|
|
770 |
|
|
771 |
void os::Bsd::set_fpu_control_word(int fpu_control) {
|
|
772 |
#ifndef AMD64
|
|
773 |
_FPU_SETCW(fpu_control);
|
|
774 |
#endif // !AMD64
|
|
775 |
}
|
|
776 |
#endif
|
|
777 |
|
|
778 |
// Check that the bsd kernel version is 2.4 or higher since earlier
|
|
779 |
// versions do not support SSE without patches.
|
|
780 |
bool os::supports_sse() {
|
|
781 |
#if defined(AMD64) || defined(_ALLBSD_SOURCE)
|
|
782 |
return true;
|
|
783 |
#else
|
|
784 |
struct utsname uts;
|
|
785 |
if( uname(&uts) != 0 ) return false; // uname fails?
|
|
786 |
char *minor_string;
|
|
787 |
int major = strtol(uts.release,&minor_string,10);
|
|
788 |
int minor = strtol(minor_string+1,NULL,10);
|
|
789 |
bool result = (major > 2 || (major==2 && minor >= 4));
|
|
790 |
#ifndef PRODUCT
|
|
791 |
if (PrintMiscellaneous && Verbose) {
|
|
792 |
tty->print("OS version is %d.%d, which %s support SSE/SSE2\n",
|
|
793 |
major,minor, result ? "DOES" : "does NOT");
|
|
794 |
}
|
|
795 |
#endif
|
|
796 |
return result;
|
|
797 |
#endif // AMD64
|
|
798 |
}
|
|
799 |
|
|
800 |
bool os::is_allocatable(size_t bytes) {
|
|
801 |
#ifdef AMD64
|
|
802 |
// unused on amd64?
|
|
803 |
return true;
|
|
804 |
#else
|
|
805 |
|
|
806 |
if (bytes < 2 * G) {
|
|
807 |
return true;
|
|
808 |
}
|
|
809 |
|
|
810 |
char* addr = reserve_memory(bytes, NULL);
|
|
811 |
|
|
812 |
if (addr != NULL) {
|
|
813 |
release_memory(addr, bytes);
|
|
814 |
}
|
|
815 |
|
|
816 |
return addr != NULL;
|
|
817 |
#endif // AMD64
|
|
818 |
}
|
|
819 |
|
|
820 |
////////////////////////////////////////////////////////////////////////////////
|
|
821 |
// thread stack
|
|
822 |
|
|
823 |
#ifdef AMD64
|
|
824 |
size_t os::Bsd::min_stack_allowed = 64 * K;
|
|
825 |
|
|
826 |
// amd64: pthread on amd64 is always in floating stack mode
|
|
827 |
bool os::Bsd::supports_variable_stack_size() { return true; }
|
|
828 |
#else
|
|
829 |
size_t os::Bsd::min_stack_allowed = (48 DEBUG_ONLY(+4))*K;
|
|
830 |
|
|
831 |
#ifdef __GNUC__
|
|
832 |
#define GET_GS() ({int gs; __asm__ volatile("movw %%gs, %w0":"=q"(gs)); gs&0xffff;})
|
|
833 |
#endif
|
|
834 |
|
|
835 |
#ifdef _ALLBSD_SOURCE
|
|
836 |
bool os::Bsd::supports_variable_stack_size() { return true; }
|
|
837 |
#else
|
|
838 |
// Test if pthread library can support variable thread stack size. BsdThreads
|
|
839 |
// in fixed stack mode allocates 2M fixed slot for each thread. BsdThreads
|
|
840 |
// in floating stack mode and NPTL support variable stack size.
|
|
841 |
bool os::Bsd::supports_variable_stack_size() {
|
|
842 |
if (os::Bsd::is_NPTL()) {
|
|
843 |
// NPTL, yes
|
|
844 |
return true;
|
|
845 |
|
|
846 |
} else {
|
|
847 |
// Note: We can't control default stack size when creating a thread.
|
|
848 |
// If we use non-default stack size (pthread_attr_setstacksize), both
|
|
849 |
// floating stack and non-floating stack BsdThreads will return the
|
|
850 |
// same value. This makes it impossible to implement this function by
|
|
851 |
// detecting thread stack size directly.
|
|
852 |
//
|
|
853 |
// An alternative approach is to check %gs. Fixed-stack BsdThreads
|
|
854 |
// do not use %gs, so its value is 0. Floating-stack BsdThreads use
|
|
855 |
// %gs (either as LDT selector or GDT selector, depending on kernel)
|
|
856 |
// to access thread specific data.
|
|
857 |
//
|
|
858 |
// Note that %gs is a reserved glibc register since early 2001, so
|
|
859 |
// applications are not allowed to change its value (Ulrich Drepper from
|
|
860 |
// Redhat confirmed that all known offenders have been modified to use
|
|
861 |
// either %fs or TSD). In the worst case scenario, when VM is embedded in
|
|
862 |
// a native application that plays with %gs, we might see non-zero %gs
|
|
863 |
// even BsdThreads is running in fixed stack mode. As the result, we'll
|
|
864 |
// return true and skip _thread_safety_check(), so we may not be able to
|
|
865 |
// detect stack-heap collisions. But otherwise it's harmless.
|
|
866 |
//
|
|
867 |
#ifdef __GNUC__
|
|
868 |
return (GET_GS() != 0);
|
|
869 |
#else
|
|
870 |
return false;
|
|
871 |
#endif
|
|
872 |
}
|
|
873 |
}
|
|
874 |
#endif
|
|
875 |
#endif // AMD64
|
|
876 |
|
|
877 |
// return default stack size for thr_type
|
|
878 |
size_t os::Bsd::default_stack_size(os::ThreadType thr_type) {
|
|
879 |
// default stack size (compiler thread needs larger stack)
|
|
880 |
#ifdef AMD64
|
|
881 |
size_t s = (thr_type == os::compiler_thread ? 4 * M : 1 * M);
|
|
882 |
#else
|
|
883 |
size_t s = (thr_type == os::compiler_thread ? 2 * M : 512 * K);
|
|
884 |
#endif // AMD64
|
|
885 |
return s;
|
|
886 |
}
|
|
887 |
|
|
888 |
size_t os::Bsd::default_guard_size(os::ThreadType thr_type) {
|
|
889 |
// Creating guard page is very expensive. Java thread has HotSpot
|
|
890 |
// guard page, only enable glibc guard page for non-Java threads.
|
|
891 |
return (thr_type == java_thread ? 0 : page_size());
|
|
892 |
}
|
|
893 |
|
|
894 |
// Java thread:
|
|
895 |
//
|
|
896 |
// Low memory addresses
|
|
897 |
// +------------------------+
|
|
898 |
// | |\ JavaThread created by VM does not have glibc
|
|
899 |
// | glibc guard page | - guard, attached Java thread usually has
|
|
900 |
// | |/ 1 page glibc guard.
|
|
901 |
// P1 +------------------------+ Thread::stack_base() - Thread::stack_size()
|
|
902 |
// | |\
|
|
903 |
// | HotSpot Guard Pages | - red and yellow pages
|
|
904 |
// | |/
|
|
905 |
// +------------------------+ JavaThread::stack_yellow_zone_base()
|
|
906 |
// | |\
|
|
907 |
// | Normal Stack | -
|
|
908 |
// | |/
|
|
909 |
// P2 +------------------------+ Thread::stack_base()
|
|
910 |
//
|
|
911 |
// Non-Java thread:
|
|
912 |
//
|
|
913 |
// Low memory addresses
|
|
914 |
// +------------------------+
|
|
915 |
// | |\
|
|
916 |
// | glibc guard page | - usually 1 page
|
|
917 |
// | |/
|
|
918 |
// P1 +------------------------+ Thread::stack_base() - Thread::stack_size()
|
|
919 |
// | |\
|
|
920 |
// | Normal Stack | -
|
|
921 |
// | |/
|
|
922 |
// P2 +------------------------+ Thread::stack_base()
|
|
923 |
//
|
|
924 |
// ** P1 (aka bottom) and size ( P2 = P1 - size) are the address and stack size returned from
|
|
925 |
// pthread_attr_getstack()
|
|
926 |
|
|
927 |
static void current_stack_region(address * bottom, size_t * size) {
|
|
928 |
#ifdef __APPLE__
|
|
929 |
pthread_t self = pthread_self();
|
|
930 |
void *stacktop = pthread_get_stackaddr_np(self);
|
|
931 |
*size = pthread_get_stacksize_np(self);
|
|
932 |
*bottom = (address) stacktop - *size;
|
|
933 |
#elif defined(__OpenBSD__)
|
|
934 |
stack_t ss;
|
|
935 |
int rslt = pthread_stackseg_np(pthread_self(), &ss);
|
|
936 |
|
|
937 |
if (rslt != 0)
|
|
938 |
fatal(err_msg("pthread_stackseg_np failed with err = %d", rslt));
|
|
939 |
|
|
940 |
*bottom = (address)((char *)ss.ss_sp - ss.ss_size);
|
|
941 |
*size = ss.ss_size;
|
|
942 |
#elif defined(_ALLBSD_SOURCE)
|
|
943 |
pthread_attr_t attr;
|
|
944 |
|
|
945 |
int rslt = pthread_attr_init(&attr);
|
|
946 |
|
|
947 |
// JVM needs to know exact stack location, abort if it fails
|
|
948 |
if (rslt != 0)
|
|
949 |
fatal(err_msg("pthread_attr_init failed with err = %d", rslt));
|
|
950 |
|
|
951 |
rslt = pthread_attr_get_np(pthread_self(), &attr);
|
|
952 |
|
|
953 |
if (rslt != 0)
|
|
954 |
fatal(err_msg("pthread_attr_get_np failed with err = %d", rslt));
|
|
955 |
|
|
956 |
if (pthread_attr_getstackaddr(&attr, (void **)bottom) != 0 ||
|
|
957 |
pthread_attr_getstacksize(&attr, size) != 0) {
|
|
958 |
fatal("Can not locate current stack attributes!");
|
|
959 |
}
|
|
960 |
|
|
961 |
pthread_attr_destroy(&attr);
|
|
962 |
#else
|
|
963 |
if (os::Bsd::is_initial_thread()) {
|
|
964 |
// initial thread needs special handling because pthread_getattr_np()
|
|
965 |
// may return bogus value.
|
|
966 |
*bottom = os::Bsd::initial_thread_stack_bottom();
|
|
967 |
*size = os::Bsd::initial_thread_stack_size();
|
|
968 |
} else {
|
|
969 |
pthread_attr_t attr;
|
|
970 |
|
|
971 |
int rslt = pthread_getattr_np(pthread_self(), &attr);
|
|
972 |
|
|
973 |
// JVM needs to know exact stack location, abort if it fails
|
|
974 |
if (rslt != 0) {
|
|
975 |
if (rslt == ENOMEM) {
|
|
976 |
vm_exit_out_of_memory(0, "pthread_getattr_np");
|
|
977 |
} else {
|
|
978 |
fatal(err_msg("pthread_getattr_np failed with errno = %d", rslt));
|
|
979 |
}
|
|
980 |
}
|
|
981 |
|
|
982 |
if (pthread_attr_getstack(&attr, (void **)bottom, size) != 0) {
|
|
983 |
fatal("Can not locate current stack attributes!");
|
|
984 |
}
|
|
985 |
|
|
986 |
pthread_attr_destroy(&attr);
|
|
987 |
|
|
988 |
}
|
|
989 |
#endif
|
|
990 |
assert(os::current_stack_pointer() >= *bottom &&
|
|
991 |
os::current_stack_pointer() < *bottom + *size, "just checking");
|
|
992 |
}
|
|
993 |
|
|
994 |
address os::current_stack_base() {
|
|
995 |
address bottom;
|
|
996 |
size_t size;
|
|
997 |
current_stack_region(&bottom, &size);
|
|
998 |
return (bottom + size);
|
|
999 |
}
|
|
1000 |
|
|
1001 |
size_t os::current_stack_size() {
|
|
1002 |
// stack size includes normal stack and HotSpot guard pages
|
|
1003 |
address bottom;
|
|
1004 |
size_t size;
|
|
1005 |
current_stack_region(&bottom, &size);
|
|
1006 |
return size;
|
|
1007 |
}
|
|
1008 |
|
|
1009 |
/////////////////////////////////////////////////////////////////////////////
|
|
1010 |
// helper functions for fatal error handler
|
|
1011 |
|
|
1012 |
void os::print_context(outputStream *st, void *context) {
|
|
1013 |
if (context == NULL) return;
|
|
1014 |
|
|
1015 |
ucontext_t *uc = (ucontext_t*)context;
|
|
1016 |
st->print_cr("Registers:");
|
|
1017 |
#ifdef AMD64
|
|
1018 |
st->print( "RAX=" INTPTR_FORMAT, uc->context_rax);
|
|
1019 |
st->print(", RBX=" INTPTR_FORMAT, uc->context_rbx);
|
|
1020 |
st->print(", RCX=" INTPTR_FORMAT, uc->context_rcx);
|
|
1021 |
st->print(", RDX=" INTPTR_FORMAT, uc->context_rdx);
|
|
1022 |
st->cr();
|
|
1023 |
st->print( "RSP=" INTPTR_FORMAT, uc->context_rsp);
|
|
1024 |
st->print(", RBP=" INTPTR_FORMAT, uc->context_rbp);
|
|
1025 |
st->print(", RSI=" INTPTR_FORMAT, uc->context_rsi);
|
|
1026 |
st->print(", RDI=" INTPTR_FORMAT, uc->context_rdi);
|
|
1027 |
st->cr();
|
|
1028 |
st->print( "R8 =" INTPTR_FORMAT, uc->context_r8);
|
|
1029 |
st->print(", R9 =" INTPTR_FORMAT, uc->context_r9);
|
|
1030 |
st->print(", R10=" INTPTR_FORMAT, uc->context_r10);
|
|
1031 |
st->print(", R11=" INTPTR_FORMAT, uc->context_r11);
|
|
1032 |
st->cr();
|
|
1033 |
st->print( "R12=" INTPTR_FORMAT, uc->context_r12);
|
|
1034 |
st->print(", R13=" INTPTR_FORMAT, uc->context_r13);
|
|
1035 |
st->print(", R14=" INTPTR_FORMAT, uc->context_r14);
|
|
1036 |
st->print(", R15=" INTPTR_FORMAT, uc->context_r15);
|
|
1037 |
st->cr();
|
|
1038 |
st->print( "RIP=" INTPTR_FORMAT, uc->context_rip);
|
|
1039 |
st->print(", EFLAGS=" INTPTR_FORMAT, uc->context_flags);
|
|
1040 |
st->print(", ERR=" INTPTR_FORMAT, uc->context_err);
|
|
1041 |
st->cr();
|
|
1042 |
st->print(" TRAPNO=" INTPTR_FORMAT, uc->context_trapno);
|
|
1043 |
#else
|
|
1044 |
st->print( "EAX=" INTPTR_FORMAT, uc->context_eax);
|
|
1045 |
st->print(", EBX=" INTPTR_FORMAT, uc->context_ebx);
|
|
1046 |
st->print(", ECX=" INTPTR_FORMAT, uc->context_ecx);
|
|
1047 |
st->print(", EDX=" INTPTR_FORMAT, uc->context_edx);
|
|
1048 |
st->cr();
|
|
1049 |
st->print( "ESP=" INTPTR_FORMAT, uc->context_esp);
|
|
1050 |
st->print(", EBP=" INTPTR_FORMAT, uc->context_ebp);
|
|
1051 |
st->print(", ESI=" INTPTR_FORMAT, uc->context_esi);
|
|
1052 |
st->print(", EDI=" INTPTR_FORMAT, uc->context_edi);
|
|
1053 |
st->cr();
|
|
1054 |
st->print( "EIP=" INTPTR_FORMAT, uc->context_eip);
|
|
1055 |
st->print(", EFLAGS=" INTPTR_FORMAT, uc->context_eflags);
|
|
1056 |
#endif // AMD64
|
|
1057 |
st->cr();
|
|
1058 |
st->cr();
|
|
1059 |
|
|
1060 |
intptr_t *sp = (intptr_t *)os::Bsd::ucontext_get_sp(uc);
|
|
1061 |
st->print_cr("Top of Stack: (sp=" PTR_FORMAT ")", sp);
|
|
1062 |
print_hex_dump(st, (address)sp, (address)(sp + 8*sizeof(intptr_t)), sizeof(intptr_t));
|
|
1063 |
st->cr();
|
|
1064 |
|
|
1065 |
// Note: it may be unsafe to inspect memory near pc. For example, pc may
|
|
1066 |
// point to garbage if entry point in an nmethod is corrupted. Leave
|
|
1067 |
// this at the end, and hope for the best.
|
|
1068 |
address pc = os::Bsd::ucontext_get_pc(uc);
|
|
1069 |
st->print_cr("Instructions: (pc=" PTR_FORMAT ")", pc);
|
|
1070 |
print_hex_dump(st, pc - 32, pc + 32, sizeof(char));
|
|
1071 |
}
|
|
1072 |
|
|
1073 |
void os::print_register_info(outputStream *st, void *context) {
|
|
1074 |
if (context == NULL) return;
|
|
1075 |
|
|
1076 |
ucontext_t *uc = (ucontext_t*)context;
|
|
1077 |
|
|
1078 |
st->print_cr("Register to memory mapping:");
|
|
1079 |
st->cr();
|
|
1080 |
|
|
1081 |
// this is horrendously verbose but the layout of the registers in the
|
|
1082 |
// context does not match how we defined our abstract Register set, so
|
|
1083 |
// we can't just iterate through the gregs area
|
|
1084 |
|
|
1085 |
// this is only for the "general purpose" registers
|
|
1086 |
|
|
1087 |
#ifdef AMD64
|
|
1088 |
st->print("RAX="); print_location(st, uc->context_rax);
|
|
1089 |
st->print("RBX="); print_location(st, uc->context_rbx);
|
|
1090 |
st->print("RCX="); print_location(st, uc->context_rcx);
|
|
1091 |
st->print("RDX="); print_location(st, uc->context_rdx);
|
|
1092 |
st->print("RSP="); print_location(st, uc->context_rsp);
|
|
1093 |
st->print("RBP="); print_location(st, uc->context_rbp);
|
|
1094 |
st->print("RSI="); print_location(st, uc->context_rsi);
|
|
1095 |
st->print("RDI="); print_location(st, uc->context_rdi);
|
|
1096 |
st->print("R8 ="); print_location(st, uc->context_r8);
|
|
1097 |
st->print("R9 ="); print_location(st, uc->context_r9);
|
|
1098 |
st->print("R10="); print_location(st, uc->context_r10);
|
|
1099 |
st->print("R11="); print_location(st, uc->context_r11);
|
|
1100 |
st->print("R12="); print_location(st, uc->context_r12);
|
|
1101 |
st->print("R13="); print_location(st, uc->context_r13);
|
|
1102 |
st->print("R14="); print_location(st, uc->context_r14);
|
|
1103 |
st->print("R15="); print_location(st, uc->context_r15);
|
|
1104 |
#else
|
|
1105 |
st->print("EAX="); print_location(st, uc->context_eax);
|
|
1106 |
st->print("EBX="); print_location(st, uc->context_ebx);
|
|
1107 |
st->print("ECX="); print_location(st, uc->context_ecx);
|
|
1108 |
st->print("EDX="); print_location(st, uc->context_edx);
|
|
1109 |
st->print("ESP="); print_location(st, uc->context_esp);
|
|
1110 |
st->print("EBP="); print_location(st, uc->context_ebp);
|
|
1111 |
st->print("ESI="); print_location(st, uc->context_esi);
|
|
1112 |
st->print("EDI="); print_location(st, uc->context_edi);
|
|
1113 |
#endif // AMD64
|
|
1114 |
|
|
1115 |
st->cr();
|
|
1116 |
}
|
|
1117 |
|
|
1118 |
void os::setup_fpu() {
|
|
1119 |
#ifndef AMD64
|
|
1120 |
address fpu_cntrl = StubRoutines::addr_fpu_cntrl_wrd_std();
|
|
1121 |
__asm__ volatile ( "fldcw (%0)" :
|
|
1122 |
: "r" (fpu_cntrl) : "memory");
|
|
1123 |
#endif // !AMD64
|
|
1124 |
}
|