Mercurial > hg > truffle
annotate src/cpu/x86/vm/runtime_x86_32.cpp @ 12962:5ccbab1c69f3
8026251: New type profiling points: parameters to methods
Summary: x86 interpreter and c1 type profiling for parameters on method entries
Reviewed-by: kvn, twisti
| author | roland |
|---|---|
| date | Tue, 22 Oct 2013 09:51:47 +0200 |
| parents | cd3d6a6b95d9 |
| children |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #ifdef COMPILER2 | |
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27 #include "asm/macroAssembler.hpp" |
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28 #include "asm/macroAssembler.inline.hpp" |
| 1972 | 29 #include "classfile/systemDictionary.hpp" |
| 30 #include "code/vmreg.hpp" | |
| 31 #include "interpreter/interpreter.hpp" | |
| 32 #include "opto/runtime.hpp" | |
| 33 #include "runtime/interfaceSupport.hpp" | |
| 34 #include "runtime/sharedRuntime.hpp" | |
| 35 #include "runtime/stubRoutines.hpp" | |
| 36 #include "runtime/vframeArray.hpp" | |
| 37 #include "utilities/globalDefinitions.hpp" | |
| 38 #include "vmreg_x86.inline.hpp" | |
| 39 #endif | |
| 0 | 40 |
| 41 | |
| 42 #define __ masm-> | |
| 43 | |
| 44 //------------------------------generate_exception_blob--------------------------- | |
| 45 // creates exception blob at the end | |
| 46 // Using exception blob, this code is jumped from a compiled method. | |
| 47 // | |
| 48 // Given an exception pc at a call we call into the runtime for the | |
| 49 // handler in this method. This handler might merely restore state | |
| 50 // (i.e. callee save registers) unwind the frame and jump to the | |
| 51 // exception handler for the nmethod if there is no Java level handler | |
| 52 // for the nmethod. | |
| 53 // | |
| 54 // This code is entered with a jmp. | |
| 55 // | |
| 56 // Arguments: | |
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57 // rax: exception oop |
| 0 | 58 // rdx: exception pc |
| 59 // | |
| 60 // Results: | |
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61 // rax: exception oop |
| 0 | 62 // rdx: exception pc in caller or ??? |
| 63 // destination: exception handler of caller | |
| 64 // | |
| 65 // Note: the exception pc MUST be at a call (precise debug information) | |
| 66 // Only register rax, rdx, rcx are not callee saved. | |
| 67 // | |
| 68 | |
| 69 void OptoRuntime::generate_exception_blob() { | |
| 70 | |
| 71 // Capture info about frame layout | |
| 72 enum layout { | |
| 73 thread_off, // last_java_sp | |
| 74 // The frame sender code expects that rbp will be in the "natural" place and | |
| 75 // will override any oopMap setting for it. We must therefore force the layout | |
| 76 // so that it agrees with the frame sender code. | |
| 77 rbp_off, | |
| 78 return_off, // slot for return address | |
| 79 framesize | |
| 80 }; | |
| 81 | |
| 82 // allocate space for the code | |
| 83 ResourceMark rm; | |
| 84 // setup code generation tools | |
| 85 CodeBuffer buffer("exception_blob", 512, 512); | |
| 86 MacroAssembler* masm = new MacroAssembler(&buffer); | |
| 87 | |
| 88 OopMapSet *oop_maps = new OopMapSet(); | |
| 89 | |
| 90 address start = __ pc(); | |
| 91 | |
| 304 | 92 __ push(rdx); |
| 93 __ subptr(rsp, return_off * wordSize); // Prolog! | |
| 0 | 94 |
| 95 // rbp, location is implicitly known | |
| 304 | 96 __ movptr(Address(rsp,rbp_off *wordSize), rbp); |
| 0 | 97 |
| 98 // Store exception in Thread object. We cannot pass any arguments to the | |
| 99 // handle_exception call, since we do not want to make any assumption | |
| 100 // about the size of the frame where the exception happened in. | |
| 101 __ get_thread(rcx); | |
| 304 | 102 __ movptr(Address(rcx, JavaThread::exception_oop_offset()), rax); |
| 103 __ movptr(Address(rcx, JavaThread::exception_pc_offset()), rdx); | |
| 0 | 104 |
| 105 // This call does all the hard work. It checks if an exception handler | |
| 106 // exists in the method. | |
| 107 // If so, it returns the handler address. | |
| 108 // If not, it prepares for stack-unwinding, restoring the callee-save | |
| 109 // registers of the frame being removed. | |
| 110 // | |
| 304 | 111 __ movptr(Address(rsp, thread_off * wordSize), rcx); // Thread is first argument |
| 0 | 112 __ set_last_Java_frame(rcx, noreg, noreg, NULL); |
| 113 | |
| 114 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, OptoRuntime::handle_exception_C))); | |
| 115 | |
| 116 // No registers to map, rbp is known implicitly | |
| 117 oop_maps->add_gc_map( __ pc() - start, new OopMap( framesize, 0 )); | |
| 118 __ get_thread(rcx); | |
| 119 __ reset_last_Java_frame(rcx, false, false); | |
| 120 | |
| 121 // Restore callee-saved registers | |
| 304 | 122 __ movptr(rbp, Address(rsp, rbp_off * wordSize)); |
| 0 | 123 |
| 304 | 124 __ addptr(rsp, return_off * wordSize); // Epilog! |
| 125 __ pop(rdx); // Exception pc | |
| 0 | 126 |
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127 // rax: exception handler for given <exception oop/exception pc> |
| 0 | 128 |
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129 // Restore SP from BP if the exception PC is a MethodHandle call site. |
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130 __ cmpl(Address(rcx, JavaThread::is_method_handle_return_offset()), 0); |
| 1567 | 131 __ cmovptr(Assembler::notEqual, rsp, rbp_mh_SP_save); |
| 0 | 132 |
| 133 // We have a handler in rax, (could be deopt blob) | |
| 134 // rdx - throwing pc, deopt blob will need it. | |
| 135 | |
| 304 | 136 __ push(rax); |
| 0 | 137 |
| 138 // Get the exception | |
| 304 | 139 __ movptr(rax, Address(rcx, JavaThread::exception_oop_offset())); |
| 0 | 140 // Get the exception pc in case we are deoptimized |
| 304 | 141 __ movptr(rdx, Address(rcx, JavaThread::exception_pc_offset())); |
| 0 | 142 #ifdef ASSERT |
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143 __ movptr(Address(rcx, JavaThread::exception_handler_pc_offset()), NULL_WORD); |
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144 __ movptr(Address(rcx, JavaThread::exception_pc_offset()), NULL_WORD); |
| 0 | 145 #endif |
| 146 // Clear the exception oop so GC no longer processes it as a root. | |
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147 __ movptr(Address(rcx, JavaThread::exception_oop_offset()), NULL_WORD); |
| 0 | 148 |
| 304 | 149 __ pop(rcx); |
| 0 | 150 |
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151 // rax: exception oop |
| 0 | 152 // rcx: exception handler |
| 153 // rdx: exception pc | |
| 154 __ jmp (rcx); | |
| 155 | |
| 156 // ------------- | |
| 157 // make sure all code is generated | |
| 158 masm->flush(); | |
| 159 | |
| 160 _exception_blob = ExceptionBlob::create(&buffer, oop_maps, framesize); | |
| 161 } |