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annotate src/cpu/x86/vm/sharedRuntime_x86.cpp @ 24166:dad95e57f1de

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Update MDO with Reason_not_compiled_exception_handler
author Tom Rodriguez <tom.rodriguez@oracle.com>
date Mon, 14 Aug 2017 08:55:23 -0700
parents e804aec381cd
children
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1 /*
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2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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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.
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22 *
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23 */
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24
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25 #include "precompiled.hpp"
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26 #include "asm/macroAssembler.hpp"
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27 #include "runtime/sharedRuntime.hpp"
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28 #include "vmreg_x86.inline.hpp"
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29 #ifdef COMPILER1
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30 #include "c1/c1_Runtime1.hpp"
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31 #endif //COMPILER1
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32
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33 #define __ masm->
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34
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35 #ifdef COMPILER1
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36 // ---------------------------------------------------------------------------
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37 // Object.hashCode, System.identityHashCode can pull the hashCode from the
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38 // header word instead of doing a full VM transition once it's been computed.
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39 // Since hashCode is usually polymorphic at call sites we can't do this
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40 // optimization at the call site without a lot of work.
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41 void SharedRuntime::inline_check_hashcode_from_object_header(MacroAssembler* masm,
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42 methodHandle method,
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43 Register obj_reg,
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44 Register result) {
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45 Label slowCase;
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46
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47 // Unlike for Object.hashCode, System.identityHashCode is static method and
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48 // gets object as argument instead of the receiver.
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49 if (method->intrinsic_id() == vmIntrinsics::_identityHashCode) {
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50 Label Continue;
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51 // return 0 for null reference input
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52 __ cmpptr(obj_reg, (int32_t)NULL_WORD);
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53 __ jcc(Assembler::notEqual, Continue);
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54 __ xorptr(result, result);
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55 __ ret(0);
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56 __ bind(Continue);
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57 }
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58
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59 __ movptr(result, Address(obj_reg, oopDesc::mark_offset_in_bytes()));
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60
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61 // check if locked
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62 __ testptr(result, markOopDesc::unlocked_value);
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63 __ jcc(Assembler::zero, slowCase);
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64
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65 if (UseBiasedLocking) {
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66 // Check if biased and fall through to runtime if so
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67 __ testptr(result, markOopDesc::biased_lock_bit_in_place);
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68 __ jcc(Assembler::notZero, slowCase);
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69 }
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70
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71 // get hash
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72 #ifdef _LP64
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73 // Read the header and build a mask to get its hash field.
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74 // Depend on hash_mask being at most 32 bits and avoid the use of hash_mask_in_place
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75 // because it could be larger than 32 bits in a 64-bit vm. See markOop.hpp.
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76 __ shrptr(result, markOopDesc::hash_shift);
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77 __ andptr(result, markOopDesc::hash_mask);
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78 #else
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79 __ andptr(result, markOopDesc::hash_mask_in_place);
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80 #endif //_LP64
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81
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82 // test if hashCode exists
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83 __ jcc(Assembler::zero, slowCase);
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84 #ifndef _LP64
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85 __ shrptr(result, markOopDesc::hash_shift);
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86 #endif
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87 __ ret(0);
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88 __ bind(slowCase);
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89 }
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90 #endif //COMPILER1
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91