Mon, 30 Jun 2008 17:04:59 -0700
6618726: Introduce -XX:+UnlockExperimentalVMOptions flag
Summary: experimental() flags will protect features of an experimental nature that are not supported in the regular product build. Made UseG1GC an experimental flag.
Reviewed-by: jmasa, kamg, coleenp
duke@435 | 1 | /* |
duke@435 | 2 | * Copyright 1997-2005 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | class StackValue : public ResourceObj { |
duke@435 | 26 | private: |
duke@435 | 27 | BasicType _type; |
duke@435 | 28 | intptr_t _i; // Blank java stack slot value |
duke@435 | 29 | Handle _o; // Java stack slot value interpreted as a Handle |
duke@435 | 30 | public: |
duke@435 | 31 | |
duke@435 | 32 | StackValue(intptr_t value) { |
duke@435 | 33 | _type = T_INT; |
duke@435 | 34 | _i = value; |
duke@435 | 35 | } |
duke@435 | 36 | |
duke@435 | 37 | StackValue(Handle value) { |
duke@435 | 38 | _type = T_OBJECT; |
duke@435 | 39 | _o = value; |
duke@435 | 40 | } |
duke@435 | 41 | |
duke@435 | 42 | StackValue() { |
duke@435 | 43 | _type = T_CONFLICT; |
duke@435 | 44 | _i = 0; |
duke@435 | 45 | } |
duke@435 | 46 | |
duke@435 | 47 | // Only used during deopt- preserve object type. |
duke@435 | 48 | StackValue(intptr_t o, BasicType t) { |
duke@435 | 49 | assert(t == T_OBJECT, "should not be used"); |
duke@435 | 50 | _type = t; |
duke@435 | 51 | _i = o; |
duke@435 | 52 | } |
duke@435 | 53 | |
duke@435 | 54 | Handle get_obj() const { |
duke@435 | 55 | assert(type() == T_OBJECT, "type check"); |
duke@435 | 56 | return _o; |
duke@435 | 57 | } |
duke@435 | 58 | |
duke@435 | 59 | void set_obj(Handle value) { |
duke@435 | 60 | assert(type() == T_OBJECT, "type check"); |
duke@435 | 61 | _o = value; |
duke@435 | 62 | } |
duke@435 | 63 | |
duke@435 | 64 | intptr_t get_int() const { |
duke@435 | 65 | assert(type() == T_INT, "type check"); |
duke@435 | 66 | return _i; |
duke@435 | 67 | } |
duke@435 | 68 | |
duke@435 | 69 | // For special case in deopt. |
duke@435 | 70 | intptr_t get_int(BasicType t) const { |
duke@435 | 71 | assert(t == T_OBJECT && type() == T_OBJECT, "type check"); |
duke@435 | 72 | return _i; |
duke@435 | 73 | } |
duke@435 | 74 | |
duke@435 | 75 | void set_int(intptr_t value) { |
duke@435 | 76 | assert(type() == T_INT, "type check"); |
duke@435 | 77 | _i = value; |
duke@435 | 78 | } |
duke@435 | 79 | |
duke@435 | 80 | BasicType type() const { return _type; } |
duke@435 | 81 | |
duke@435 | 82 | bool equal(StackValue *value) { |
duke@435 | 83 | if (_type != value->_type) return false; |
duke@435 | 84 | if (_type == T_OBJECT) |
duke@435 | 85 | return (_o == value->_o); |
duke@435 | 86 | else { |
duke@435 | 87 | assert(_type == T_INT, "sanity check"); |
duke@435 | 88 | // [phh] compare only low addressed portions of intptr_t slots |
duke@435 | 89 | return (*(int *)&_i == *(int *)&value->_i); |
duke@435 | 90 | } |
duke@435 | 91 | } |
duke@435 | 92 | |
duke@435 | 93 | static StackValue* create_stack_value(const frame* fr, const RegisterMap* reg_map, ScopeValue* sv); |
duke@435 | 94 | static BasicLock* resolve_monitor_lock(const frame* fr, Location location); |
duke@435 | 95 | |
duke@435 | 96 | #ifndef PRODUCT |
duke@435 | 97 | public: |
duke@435 | 98 | // Printing |
duke@435 | 99 | void print_on(outputStream* st) const; |
duke@435 | 100 | #endif |
duke@435 | 101 | }; |