Thu, 27 May 2010 18:01:56 -0700
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
Summary: Added new product ObjectAlignmentInBytes flag to control object alignment.
Reviewed-by: twisti, ysr, iveresov
duke@435 | 1 | /* |
jrose@1100 | 2 | * Copyright 1997-2009 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 | # include "incls/_precompiled.incl" |
duke@435 | 26 | #include "incls/_fieldDescriptor.cpp.incl" |
duke@435 | 27 | |
duke@435 | 28 | |
duke@435 | 29 | oop fieldDescriptor::loader() const { |
duke@435 | 30 | return instanceKlass::cast(_cp->pool_holder())->class_loader(); |
duke@435 | 31 | } |
duke@435 | 32 | |
duke@435 | 33 | typeArrayOop fieldDescriptor::annotations() const { |
duke@435 | 34 | instanceKlass* ik = instanceKlass::cast(field_holder()); |
duke@435 | 35 | objArrayOop md = ik->fields_annotations(); |
duke@435 | 36 | if (md == NULL) |
duke@435 | 37 | return NULL; |
duke@435 | 38 | assert((index() % instanceKlass::next_offset) == 0, ""); |
duke@435 | 39 | return typeArrayOop(md->obj_at(index() / instanceKlass::next_offset)); |
duke@435 | 40 | } |
duke@435 | 41 | |
duke@435 | 42 | constantTag fieldDescriptor::initial_value_tag() const { |
duke@435 | 43 | return constants()->tag_at(_initial_value_index); |
duke@435 | 44 | } |
duke@435 | 45 | |
duke@435 | 46 | jint fieldDescriptor::int_initial_value() const { |
duke@435 | 47 | return constants()->int_at(_initial_value_index); |
duke@435 | 48 | } |
duke@435 | 49 | |
duke@435 | 50 | jlong fieldDescriptor::long_initial_value() const { |
duke@435 | 51 | return constants()->long_at(_initial_value_index); |
duke@435 | 52 | } |
duke@435 | 53 | |
duke@435 | 54 | jfloat fieldDescriptor::float_initial_value() const { |
duke@435 | 55 | return constants()->float_at(_initial_value_index); |
duke@435 | 56 | } |
duke@435 | 57 | |
duke@435 | 58 | jdouble fieldDescriptor::double_initial_value() const { |
duke@435 | 59 | return constants()->double_at(_initial_value_index); |
duke@435 | 60 | } |
duke@435 | 61 | |
duke@435 | 62 | oop fieldDescriptor::string_initial_value(TRAPS) const { |
duke@435 | 63 | return constants()->string_at(_initial_value_index, CHECK_0); |
duke@435 | 64 | } |
duke@435 | 65 | |
duke@435 | 66 | void fieldDescriptor::initialize(klassOop k, int index) { |
duke@435 | 67 | instanceKlass* ik = instanceKlass::cast(k); |
duke@435 | 68 | _cp = ik->constants(); |
duke@435 | 69 | typeArrayOop fields = ik->fields(); |
duke@435 | 70 | |
duke@435 | 71 | assert(fields->length() % instanceKlass::next_offset == 0, "Illegal size of field array"); |
duke@435 | 72 | assert(fields->length() >= index + instanceKlass::next_offset, "Illegal size of field array"); |
duke@435 | 73 | |
duke@435 | 74 | _access_flags.set_field_flags(fields->ushort_at(index + instanceKlass::access_flags_offset)); |
duke@435 | 75 | _name_index = fields->ushort_at(index + instanceKlass::name_index_offset); |
duke@435 | 76 | _signature_index = fields->ushort_at(index + instanceKlass::signature_index_offset); |
duke@435 | 77 | _initial_value_index = fields->ushort_at(index + instanceKlass::initval_index_offset); |
duke@435 | 78 | guarantee(_name_index != 0 && _signature_index != 0, "bad constant pool index for fieldDescriptor"); |
duke@435 | 79 | _offset = ik->offset_from_fields( index ); |
duke@435 | 80 | _generic_signature_index = fields->ushort_at(index + instanceKlass::generic_signature_offset); |
duke@435 | 81 | _index = index; |
duke@435 | 82 | } |
duke@435 | 83 | |
duke@435 | 84 | #ifndef PRODUCT |
duke@435 | 85 | |
duke@435 | 86 | void fieldDescriptor::print_on(outputStream* st) const { |
duke@435 | 87 | _access_flags.print_on(st); |
duke@435 | 88 | constants()->symbol_at(_name_index)->print_value_on(st); |
duke@435 | 89 | st->print(" "); |
duke@435 | 90 | constants()->symbol_at(_signature_index)->print_value_on(st); |
duke@435 | 91 | st->print(" @%d ", offset()); |
duke@435 | 92 | if (WizardMode && has_initial_value()) { |
duke@435 | 93 | st->print("(initval "); |
duke@435 | 94 | constantTag t = initial_value_tag(); |
duke@435 | 95 | if (t.is_int()) { |
duke@435 | 96 | st->print("int %d)", int_initial_value()); |
duke@435 | 97 | } else if (t.is_long()){ |
duke@435 | 98 | st->print_jlong(long_initial_value()); |
duke@435 | 99 | } else if (t.is_float()){ |
duke@435 | 100 | st->print("float %f)", float_initial_value()); |
duke@435 | 101 | } else if (t.is_double()){ |
duke@435 | 102 | st->print("double %lf)", double_initial_value()); |
duke@435 | 103 | } |
duke@435 | 104 | } |
duke@435 | 105 | } |
duke@435 | 106 | |
duke@435 | 107 | void fieldDescriptor::print_on_for(outputStream* st, oop obj) { |
duke@435 | 108 | print_on(st); |
duke@435 | 109 | BasicType ft = field_type(); |
jrose@1100 | 110 | jint as_int = 0; |
duke@435 | 111 | switch (ft) { |
duke@435 | 112 | case T_BYTE: |
duke@435 | 113 | as_int = (jint)obj->byte_field(offset()); |
duke@435 | 114 | st->print(" %d", obj->byte_field(offset())); |
duke@435 | 115 | break; |
duke@435 | 116 | case T_CHAR: |
jrose@1100 | 117 | as_int = (jint)obj->char_field(offset()); |
duke@435 | 118 | { |
duke@435 | 119 | jchar c = obj->char_field(offset()); |
duke@435 | 120 | as_int = c; |
duke@435 | 121 | st->print(" %c %d", isprint(c) ? c : ' ', c); |
duke@435 | 122 | } |
duke@435 | 123 | break; |
duke@435 | 124 | case T_DOUBLE: |
duke@435 | 125 | st->print(" %lf", obj->double_field(offset())); |
duke@435 | 126 | break; |
duke@435 | 127 | case T_FLOAT: |
duke@435 | 128 | as_int = obj->int_field(offset()); |
duke@435 | 129 | st->print(" %f", obj->float_field(offset())); |
duke@435 | 130 | break; |
duke@435 | 131 | case T_INT: |
jrose@1100 | 132 | as_int = obj->int_field(offset()); |
duke@435 | 133 | st->print(" %d", obj->int_field(offset())); |
duke@435 | 134 | break; |
duke@435 | 135 | case T_LONG: |
duke@435 | 136 | st->print(" "); |
duke@435 | 137 | st->print_jlong(obj->long_field(offset())); |
duke@435 | 138 | break; |
duke@435 | 139 | case T_SHORT: |
duke@435 | 140 | as_int = obj->short_field(offset()); |
duke@435 | 141 | st->print(" %d", obj->short_field(offset())); |
duke@435 | 142 | break; |
duke@435 | 143 | case T_BOOLEAN: |
duke@435 | 144 | as_int = obj->bool_field(offset()); |
duke@435 | 145 | st->print(" %s", obj->bool_field(offset()) ? "true" : "false"); |
duke@435 | 146 | break; |
duke@435 | 147 | case T_ARRAY: |
duke@435 | 148 | st->print(" "); |
jrose@1100 | 149 | NOT_LP64(as_int = obj->int_field(offset())); |
duke@435 | 150 | obj->obj_field(offset())->print_value_on(st); |
duke@435 | 151 | break; |
duke@435 | 152 | case T_OBJECT: |
duke@435 | 153 | st->print(" "); |
jrose@1100 | 154 | NOT_LP64(as_int = obj->int_field(offset())); |
duke@435 | 155 | obj->obj_field(offset())->print_value_on(st); |
duke@435 | 156 | break; |
duke@435 | 157 | default: |
duke@435 | 158 | ShouldNotReachHere(); |
duke@435 | 159 | break; |
duke@435 | 160 | } |
duke@435 | 161 | // Print a hint as to the underlying integer representation. This can be wrong for |
duke@435 | 162 | // pointers on an LP64 machine |
jrose@1100 | 163 | if (ft == T_LONG || ft == T_DOUBLE LP64_ONLY(|| !is_java_primitive(ft)) ) { |
duke@435 | 164 | st->print(" (%x %x)", obj->int_field(offset()), obj->int_field(offset()+sizeof(jint))); |
jrose@1100 | 165 | } else if (as_int < 0 || as_int > 9) { |
duke@435 | 166 | st->print(" (%x)", as_int); |
duke@435 | 167 | } |
duke@435 | 168 | } |
duke@435 | 169 | |
duke@435 | 170 | #endif /* PRODUCT */ |