Mercurial > hg > truffle
view src/cpu/x86/vm/runtime_x86_32.cpp @ 445:f9d938ede196 jdk7-b41
6775176: Bump HS14 build number to 08
Summary: Update the Hotspot build number to 08
Reviewed-by: jcoomes
author | trims |
---|---|
date | Fri, 21 Nov 2008 16:11:18 -0800 |
parents | 9ee9cf798b59 |
children | db4caa99ef11 |
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/* * Copyright 1998-2008 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. * */ #include "incls/_precompiled.incl" #include "incls/_runtime_x86_32.cpp.incl" #define __ masm-> ExceptionBlob* OptoRuntime::_exception_blob; //------------------------------generate_exception_blob--------------------------- // creates exception blob at the end // Using exception blob, this code is jumped from a compiled method. // // Given an exception pc at a call we call into the runtime for the // handler in this method. This handler might merely restore state // (i.e. callee save registers) unwind the frame and jump to the // exception handler for the nmethod if there is no Java level handler // for the nmethod. // // This code is entered with a jmp. // // Arguments: // rax,: exception oop // rdx: exception pc // // Results: // rax,: exception oop // rdx: exception pc in caller or ??? // destination: exception handler of caller // // Note: the exception pc MUST be at a call (precise debug information) // Only register rax, rdx, rcx are not callee saved. // void OptoRuntime::generate_exception_blob() { // Capture info about frame layout enum layout { thread_off, // last_java_sp // The frame sender code expects that rbp will be in the "natural" place and // will override any oopMap setting for it. We must therefore force the layout // so that it agrees with the frame sender code. rbp_off, return_off, // slot for return address framesize }; // allocate space for the code ResourceMark rm; // setup code generation tools CodeBuffer buffer("exception_blob", 512, 512); MacroAssembler* masm = new MacroAssembler(&buffer); OopMapSet *oop_maps = new OopMapSet(); address start = __ pc(); __ push(rdx); __ subptr(rsp, return_off * wordSize); // Prolog! // rbp, location is implicitly known __ movptr(Address(rsp,rbp_off *wordSize), rbp); // Store exception in Thread object. We cannot pass any arguments to the // handle_exception call, since we do not want to make any assumption // about the size of the frame where the exception happened in. __ get_thread(rcx); __ movptr(Address(rcx, JavaThread::exception_oop_offset()), rax); __ movptr(Address(rcx, JavaThread::exception_pc_offset()), rdx); // This call does all the hard work. It checks if an exception handler // exists in the method. // If so, it returns the handler address. // If not, it prepares for stack-unwinding, restoring the callee-save // registers of the frame being removed. // __ movptr(Address(rsp, thread_off * wordSize), rcx); // Thread is first argument __ set_last_Java_frame(rcx, noreg, noreg, NULL); __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, OptoRuntime::handle_exception_C))); // No registers to map, rbp is known implicitly oop_maps->add_gc_map( __ pc() - start, new OopMap( framesize, 0 )); __ get_thread(rcx); __ reset_last_Java_frame(rcx, false, false); // Restore callee-saved registers __ movptr(rbp, Address(rsp, rbp_off * wordSize)); __ addptr(rsp, return_off * wordSize); // Epilog! __ pop(rdx); // Exception pc // rax,: exception handler for given <exception oop/exception pc> // We have a handler in rax, (could be deopt blob) // rdx - throwing pc, deopt blob will need it. __ push(rax); // rcx contains handler address __ get_thread(rcx); // TLS // Get the exception __ movptr(rax, Address(rcx, JavaThread::exception_oop_offset())); // Get the exception pc in case we are deoptimized __ movptr(rdx, Address(rcx, JavaThread::exception_pc_offset())); #ifdef ASSERT __ movptr(Address(rcx, JavaThread::exception_handler_pc_offset()), (int32_t)NULL_WORD); __ movptr(Address(rcx, JavaThread::exception_pc_offset()), (int32_t)NULL_WORD); #endif // Clear the exception oop so GC no longer processes it as a root. __ movptr(Address(rcx, JavaThread::exception_oop_offset()), (int32_t)NULL_WORD); __ pop(rcx); // rax,: exception oop // rcx: exception handler // rdx: exception pc __ jmp (rcx); // ------------- // make sure all code is generated masm->flush(); _exception_blob = ExceptionBlob::create(&buffer, oop_maps, framesize); }