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src/share/vm/runtime/stackValue.hpp@fd44df5e3bc3 (annotated)
src/share/vm/runtime/stackValue.hpp
Wed, 14 Oct 2020 17:44:48 +0800
- author
- aoqi
- date
- Wed, 14 Oct 2020 17:44:48 +0800
- changeset 9931
- fd44df5e3bc3
- parent 6876
- 710a3c8b516e
- permissions
- -rw-r--r--
Merge
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| aoqi@0 | 4 | * |
| aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
| aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| aoqi@0 | 7 | * published by the Free Software Foundation. |
| aoqi@0 | 8 | * |
| aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| aoqi@0 | 13 | * accompanied this code). |
| aoqi@0 | 14 | * |
| aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
| aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| aoqi@0 | 18 | * |
| aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
| aoqi@0 | 21 | * questions. |
| aoqi@0 | 22 | * |
| aoqi@0 | 23 | */ |
| aoqi@0 | 24 | |
| aoqi@0 | 25 | #ifndef SHARE_VM_RUNTIME_STACKVALUE_HPP |
| aoqi@0 | 26 | #define SHARE_VM_RUNTIME_STACKVALUE_HPP |
| aoqi@0 | 27 | |
| aoqi@0 | 28 | #include "code/location.hpp" |
| aoqi@0 | 29 | #include "runtime/handles.hpp" |
| aoqi@0 | 30 | #include "utilities/top.hpp" |
| aoqi@0 | 31 | |
| aoqi@0 | 32 | class StackValue : public ResourceObj { |
| aoqi@0 | 33 | private: |
| aoqi@0 | 34 | BasicType _type; |
| aoqi@0 | 35 | intptr_t _i; // Blank java stack slot value |
| aoqi@0 | 36 | Handle _o; // Java stack slot value interpreted as a Handle |
| aoqi@0 | 37 | public: |
| aoqi@0 | 38 | |
| aoqi@0 | 39 | StackValue(intptr_t value) { |
| aoqi@0 | 40 | _type = T_INT; |
| aoqi@0 | 41 | _i = value; |
| aoqi@0 | 42 | } |
| aoqi@0 | 43 | |
| aoqi@0 | 44 | StackValue(Handle value, intptr_t scalar_replaced = 0) { |
| aoqi@0 | 45 | _type = T_OBJECT; |
| aoqi@0 | 46 | _i = scalar_replaced; |
| aoqi@0 | 47 | _o = value; |
| aoqi@0 | 48 | assert(_i == 0 || _o.is_null(), "not null object should not be marked as scalar replaced"); |
| aoqi@0 | 49 | } |
| aoqi@0 | 50 | |
| aoqi@0 | 51 | StackValue() { |
| aoqi@0 | 52 | _type = T_CONFLICT; |
| aoqi@0 | 53 | _i = 0; |
| aoqi@0 | 54 | } |
| aoqi@0 | 55 | |
| aoqi@0 | 56 | // Only used during deopt- preserve object type. |
| aoqi@0 | 57 | StackValue(intptr_t o, BasicType t) { |
| aoqi@0 | 58 | assert(t == T_OBJECT, "should not be used"); |
| aoqi@0 | 59 | _type = t; |
| aoqi@0 | 60 | _i = o; |
| aoqi@0 | 61 | } |
| aoqi@0 | 62 | |
| aoqi@0 | 63 | Handle get_obj() const { |
| aoqi@0 | 64 | assert(type() == T_OBJECT, "type check"); |
| aoqi@0 | 65 | return _o; |
| aoqi@0 | 66 | } |
| aoqi@0 | 67 | |
| aoqi@0 | 68 | bool obj_is_scalar_replaced() const { |
| aoqi@0 | 69 | assert(type() == T_OBJECT, "type check"); |
| aoqi@0 | 70 | return _i != 0; |
| aoqi@0 | 71 | } |
| aoqi@0 | 72 | |
| aoqi@0 | 73 | void set_obj(Handle value) { |
| aoqi@0 | 74 | assert(type() == T_OBJECT, "type check"); |
| aoqi@0 | 75 | _o = value; |
| aoqi@0 | 76 | } |
| aoqi@0 | 77 | |
| aoqi@0 | 78 | intptr_t get_int() const { |
| aoqi@0 | 79 | assert(type() == T_INT, "type check"); |
| aoqi@0 | 80 | return _i; |
| aoqi@0 | 81 | } |
| aoqi@0 | 82 | |
| aoqi@0 | 83 | // For special case in deopt. |
| aoqi@0 | 84 | intptr_t get_int(BasicType t) const { |
| aoqi@0 | 85 | assert(t == T_OBJECT && type() == T_OBJECT, "type check"); |
| aoqi@0 | 86 | return _i; |
| aoqi@0 | 87 | } |
| aoqi@0 | 88 | |
| aoqi@0 | 89 | void set_int(intptr_t value) { |
| aoqi@0 | 90 | assert(type() == T_INT, "type check"); |
| aoqi@0 | 91 | _i = value; |
| aoqi@0 | 92 | } |
| aoqi@0 | 93 | |
| aoqi@0 | 94 | BasicType type() const { return _type; } |
| aoqi@0 | 95 | |
| aoqi@0 | 96 | bool equal(StackValue *value) { |
| aoqi@0 | 97 | if (_type != value->_type) return false; |
| aoqi@0 | 98 | if (_type == T_OBJECT) |
| aoqi@0 | 99 | return (_o == value->_o); |
| aoqi@0 | 100 | else { |
| aoqi@0 | 101 | assert(_type == T_INT, "sanity check"); |
| aoqi@0 | 102 | // [phh] compare only low addressed portions of intptr_t slots |
| aoqi@0 | 103 | return (*(int *)&_i == *(int *)&value->_i); |
| aoqi@0 | 104 | } |
| aoqi@0 | 105 | } |
| aoqi@0 | 106 | |
| aoqi@0 | 107 | static StackValue* create_stack_value(const frame* fr, const RegisterMap* reg_map, ScopeValue* sv); |
| aoqi@0 | 108 | static BasicLock* resolve_monitor_lock(const frame* fr, Location location); |
| aoqi@0 | 109 | |
| aoqi@0 | 110 | #ifndef PRODUCT |
| aoqi@0 | 111 | public: |
| aoqi@0 | 112 | // Printing |
| aoqi@0 | 113 | void print_on(outputStream* st) const; |
| aoqi@0 | 114 | #endif |
| aoqi@0 | 115 | }; |
| aoqi@0 | 116 | |
| aoqi@0 | 117 | #endif // SHARE_VM_RUNTIME_STACKVALUE_HPP |
