Wed, 17 Nov 2010 15:07:43 -0800
7000973: isBogus needs to be called on the to-be-returned entry, not on the current entry
Reviewed-by: jjg
Contributed-by: jan.lahoda@oracle.com
jjg@283 | 1 | /* |
ohair@554 | 2 | * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved. |
jjg@283 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
jjg@283 | 4 | * |
jjg@283 | 5 | * This code is free software; you can redistribute it and/or modify it |
jjg@283 | 6 | * under the terms of the GNU General Public License version 2 only, as |
ohair@554 | 7 | * published by the Free Software Foundation. Oracle designates this |
jjg@283 | 8 | * particular file as subject to the "Classpath" exception as provided |
ohair@554 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
jjg@283 | 10 | * |
jjg@283 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
jjg@283 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
jjg@283 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
jjg@283 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
jjg@283 | 15 | * accompanied this code). |
jjg@283 | 16 | * |
jjg@283 | 17 | * You should have received a copy of the GNU General Public License version |
jjg@283 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
jjg@283 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
jjg@283 | 20 | * |
ohair@554 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
ohair@554 | 22 | * or visit www.oracle.com if you need additional information or have any |
ohair@554 | 23 | * questions. |
jjg@283 | 24 | */ |
jjg@283 | 25 | |
jjg@283 | 26 | package com.sun.tools.javap; |
jjg@283 | 27 | |
jjg@283 | 28 | import com.sun.tools.classfile.AccessFlags; |
jjg@283 | 29 | import java.util.HashMap; |
jjg@283 | 30 | import java.util.Map; |
jjg@283 | 31 | |
jjg@283 | 32 | import com.sun.tools.classfile.Attribute; |
jjg@283 | 33 | import com.sun.tools.classfile.Code_attribute; |
jjg@283 | 34 | import com.sun.tools.classfile.ConstantPool; |
jjg@283 | 35 | import com.sun.tools.classfile.ConstantPoolException; |
jjg@283 | 36 | import com.sun.tools.classfile.Descriptor; |
jjg@283 | 37 | import com.sun.tools.classfile.Descriptor.InvalidDescriptor; |
jjg@283 | 38 | import com.sun.tools.classfile.Instruction; |
jjg@283 | 39 | import com.sun.tools.classfile.Method; |
jjg@283 | 40 | import com.sun.tools.classfile.StackMapTable_attribute; |
jjg@283 | 41 | import com.sun.tools.classfile.StackMapTable_attribute.*; |
jjg@283 | 42 | |
jjg@283 | 43 | import static com.sun.tools.classfile.StackMapTable_attribute.verification_type_info.*; |
jjg@283 | 44 | |
jjg@283 | 45 | /** |
jjg@283 | 46 | * Annotate instructions with stack map. |
jjg@283 | 47 | * |
jjg@581 | 48 | * <p><b>This is NOT part of any supported API. |
jjg@581 | 49 | * If you write code that depends on this, you do so at your own risk. |
jjg@283 | 50 | * This code and its internal interfaces are subject to change or |
jjg@283 | 51 | * deletion without notice.</b> |
jjg@283 | 52 | */ |
jjg@283 | 53 | public class StackMapWriter extends InstructionDetailWriter { |
jjg@283 | 54 | static StackMapWriter instance(Context context) { |
jjg@283 | 55 | StackMapWriter instance = context.get(StackMapWriter.class); |
jjg@283 | 56 | if (instance == null) |
jjg@283 | 57 | instance = new StackMapWriter(context); |
jjg@283 | 58 | return instance; |
jjg@283 | 59 | } |
jjg@283 | 60 | |
jjg@283 | 61 | protected StackMapWriter(Context context) { |
jjg@283 | 62 | super(context); |
jjg@283 | 63 | context.put(StackMapWriter.class, this); |
jjg@283 | 64 | classWriter = ClassWriter.instance(context); |
jjg@283 | 65 | } |
jjg@283 | 66 | |
jjg@283 | 67 | public void reset(Code_attribute attr) { |
jjg@283 | 68 | setStackMap((StackMapTable_attribute) attr.attributes.get(Attribute.StackMapTable)); |
jjg@283 | 69 | } |
jjg@283 | 70 | |
jjg@283 | 71 | void setStackMap(StackMapTable_attribute attr) { |
jjg@283 | 72 | if (attr == null) { |
jjg@283 | 73 | map = null; |
jjg@283 | 74 | return; |
jjg@283 | 75 | } |
jjg@283 | 76 | |
jjg@283 | 77 | Method m = classWriter.getMethod(); |
jjg@283 | 78 | Descriptor d = m.descriptor; |
jjg@283 | 79 | String[] args; |
jjg@283 | 80 | try { |
jjg@283 | 81 | ConstantPool cp = classWriter.getClassFile().constant_pool; |
jjg@283 | 82 | String argString = d.getParameterTypes(cp); |
jjg@283 | 83 | args = argString.substring(1, argString.length() - 1).split("[, ]+"); |
jjg@283 | 84 | } catch (ConstantPoolException e) { |
jjg@283 | 85 | return; |
jjg@283 | 86 | } catch (InvalidDescriptor e) { |
jjg@283 | 87 | return; |
jjg@283 | 88 | } |
jjg@283 | 89 | boolean isStatic = m.access_flags.is(AccessFlags.ACC_STATIC); |
jjg@283 | 90 | |
jjg@283 | 91 | verification_type_info[] initialLocals = new verification_type_info[(isStatic ? 0 : 1) + args.length]; |
jjg@283 | 92 | if (!isStatic) |
jjg@283 | 93 | initialLocals[0] = new CustomVerificationTypeInfo("this"); |
jjg@283 | 94 | for (int i = 0; i < args.length; i++) { |
jjg@283 | 95 | initialLocals[(isStatic ? 0 : 1) + i] = |
jjg@283 | 96 | new CustomVerificationTypeInfo(args[i].replace(".", "/")); |
jjg@283 | 97 | } |
jjg@283 | 98 | |
jjg@283 | 99 | map = new HashMap<Integer, StackMap>(); |
jjg@283 | 100 | StackMapBuilder builder = new StackMapBuilder(); |
jjg@283 | 101 | |
jjg@283 | 102 | // using -1 as the pc for the initial frame effectively compensates for |
jjg@283 | 103 | // the difference in behavior for the first stack map frame (where the |
jjg@283 | 104 | // pc offset is just offset_delta) compared to subsequent frames (where |
jjg@283 | 105 | // the pc offset is always offset_delta+1). |
jjg@283 | 106 | int pc = -1; |
jjg@283 | 107 | |
jjg@283 | 108 | map.put(pc, new StackMap(initialLocals, empty)); |
jjg@283 | 109 | |
jjg@283 | 110 | for (int i = 0; i < attr.entries.length; i++) |
jjg@283 | 111 | pc = attr.entries[i].accept(builder, pc); |
jjg@283 | 112 | } |
jjg@283 | 113 | |
jjg@283 | 114 | public void writeInitialDetails() { |
jjg@283 | 115 | writeDetails(-1); |
jjg@283 | 116 | } |
jjg@283 | 117 | |
jjg@283 | 118 | public void writeDetails(Instruction instr) { |
jjg@283 | 119 | writeDetails(instr.getPC()); |
jjg@283 | 120 | } |
jjg@283 | 121 | |
jjg@283 | 122 | private void writeDetails(int pc) { |
jjg@283 | 123 | if (map == null) |
jjg@283 | 124 | return; |
jjg@283 | 125 | |
jjg@283 | 126 | StackMap m = map.get(pc); |
jjg@283 | 127 | if (m != null) { |
jjg@283 | 128 | print("StackMap locals: ", m.locals); |
jjg@283 | 129 | print("StackMap stack: ", m.stack); |
jjg@283 | 130 | } |
jjg@283 | 131 | |
jjg@283 | 132 | } |
jjg@283 | 133 | |
jjg@283 | 134 | void print(String label, verification_type_info[] entries) { |
jjg@283 | 135 | print(label); |
jjg@283 | 136 | for (int i = 0; i < entries.length; i++) { |
jjg@283 | 137 | print(" "); |
jjg@283 | 138 | print(entries[i]); |
jjg@283 | 139 | } |
jjg@283 | 140 | println(); |
jjg@283 | 141 | } |
jjg@283 | 142 | |
jjg@283 | 143 | void print(verification_type_info entry) { |
jjg@283 | 144 | if (entry == null) { |
jjg@283 | 145 | print("ERROR"); |
jjg@283 | 146 | return; |
jjg@283 | 147 | } |
jjg@283 | 148 | |
jjg@283 | 149 | switch (entry.tag) { |
jjg@283 | 150 | case -1: |
jjg@283 | 151 | print(((CustomVerificationTypeInfo) entry).text); |
jjg@283 | 152 | break; |
jjg@283 | 153 | |
jjg@283 | 154 | case ITEM_Top: |
jjg@283 | 155 | print("top"); |
jjg@283 | 156 | break; |
jjg@283 | 157 | |
jjg@283 | 158 | case ITEM_Integer: |
jjg@283 | 159 | print("int"); |
jjg@283 | 160 | break; |
jjg@283 | 161 | |
jjg@283 | 162 | case ITEM_Float: |
jjg@283 | 163 | print("float"); |
jjg@283 | 164 | break; |
jjg@283 | 165 | |
jjg@283 | 166 | case ITEM_Long: |
jjg@283 | 167 | print("long"); |
jjg@283 | 168 | break; |
jjg@283 | 169 | |
jjg@283 | 170 | case ITEM_Double: |
jjg@283 | 171 | print("double"); |
jjg@283 | 172 | break; |
jjg@283 | 173 | |
jjg@283 | 174 | case ITEM_Null: |
jjg@283 | 175 | print("null"); |
jjg@283 | 176 | break; |
jjg@283 | 177 | |
jjg@283 | 178 | case ITEM_UninitializedThis: |
jjg@283 | 179 | print("uninit_this"); |
jjg@283 | 180 | break; |
jjg@283 | 181 | |
jjg@283 | 182 | case ITEM_Object: |
jjg@283 | 183 | try { |
jjg@283 | 184 | ConstantPool cp = classWriter.getClassFile().constant_pool; |
jjg@283 | 185 | ConstantPool.CONSTANT_Class_info class_info = cp.getClassInfo(((Object_variable_info) entry).cpool_index); |
jjg@283 | 186 | print(cp.getUTF8Value(class_info.name_index)); |
jjg@283 | 187 | } catch (ConstantPoolException e) { |
jjg@283 | 188 | print("??"); |
jjg@283 | 189 | } |
jjg@283 | 190 | break; |
jjg@283 | 191 | |
jjg@283 | 192 | case ITEM_Uninitialized: |
jjg@283 | 193 | print(((Uninitialized_variable_info) entry).offset); |
jjg@283 | 194 | break; |
jjg@283 | 195 | } |
jjg@283 | 196 | |
jjg@283 | 197 | } |
jjg@283 | 198 | |
jjg@283 | 199 | private Map<Integer, StackMap> map; |
jjg@283 | 200 | private ClassWriter classWriter; |
jjg@283 | 201 | |
jjg@283 | 202 | class StackMapBuilder |
jjg@283 | 203 | implements StackMapTable_attribute.stack_map_frame.Visitor<Integer, Integer> { |
jjg@283 | 204 | |
jjg@283 | 205 | public Integer visit_same_frame(same_frame frame, Integer pc) { |
jjg@283 | 206 | int new_pc = pc + frame.getOffsetDelta() + 1; |
jjg@283 | 207 | StackMap m = map.get(pc); |
jjg@283 | 208 | assert (m != null); |
jjg@283 | 209 | map.put(new_pc, m); |
jjg@283 | 210 | return new_pc; |
jjg@283 | 211 | } |
jjg@283 | 212 | |
jjg@283 | 213 | public Integer visit_same_locals_1_stack_item_frame(same_locals_1_stack_item_frame frame, Integer pc) { |
jjg@283 | 214 | int new_pc = pc + frame.getOffsetDelta() + 1; |
jjg@283 | 215 | StackMap prev = map.get(pc); |
jjg@283 | 216 | assert (prev != null); |
jjg@283 | 217 | StackMap m = new StackMap(prev.locals, frame.stack); |
jjg@283 | 218 | map.put(new_pc, m); |
jjg@283 | 219 | return new_pc; |
jjg@283 | 220 | } |
jjg@283 | 221 | |
jjg@283 | 222 | public Integer visit_same_locals_1_stack_item_frame_extended(same_locals_1_stack_item_frame_extended frame, Integer pc) { |
jjg@283 | 223 | int new_pc = pc + frame.getOffsetDelta() + 1; |
jjg@283 | 224 | StackMap prev = map.get(pc); |
jjg@283 | 225 | assert (prev != null); |
jjg@283 | 226 | StackMap m = new StackMap(prev.locals, frame.stack); |
jjg@283 | 227 | map.put(new_pc, m); |
jjg@283 | 228 | return new_pc; |
jjg@283 | 229 | } |
jjg@283 | 230 | |
jjg@283 | 231 | public Integer visit_chop_frame(chop_frame frame, Integer pc) { |
jjg@283 | 232 | int new_pc = pc + frame.getOffsetDelta() + 1; |
jjg@283 | 233 | StackMap prev = map.get(pc); |
jjg@283 | 234 | assert (prev != null); |
jjg@283 | 235 | int k = 251 - frame.frame_type; |
jjg@283 | 236 | verification_type_info[] new_locals = new verification_type_info[prev.locals.length - k]; |
jjg@283 | 237 | System.arraycopy(prev.locals, 0, new_locals, 0, new_locals.length); |
jjg@283 | 238 | StackMap m = new StackMap(new_locals, empty); |
jjg@283 | 239 | map.put(new_pc, m); |
jjg@283 | 240 | return new_pc; |
jjg@283 | 241 | } |
jjg@283 | 242 | |
jjg@283 | 243 | public Integer visit_same_frame_extended(same_frame_extended frame, Integer pc) { |
jjg@283 | 244 | int new_pc = pc + frame.getOffsetDelta(); |
jjg@283 | 245 | StackMap m = map.get(pc); |
jjg@283 | 246 | assert (m != null); |
jjg@283 | 247 | map.put(new_pc, m); |
jjg@283 | 248 | return new_pc; |
jjg@283 | 249 | } |
jjg@283 | 250 | |
jjg@283 | 251 | public Integer visit_append_frame(append_frame frame, Integer pc) { |
jjg@283 | 252 | int new_pc = pc + frame.getOffsetDelta() + 1; |
jjg@283 | 253 | StackMap prev = map.get(pc); |
jjg@283 | 254 | assert (prev != null); |
jjg@283 | 255 | verification_type_info[] new_locals = new verification_type_info[prev.locals.length + frame.locals.length]; |
jjg@283 | 256 | System.arraycopy(prev.locals, 0, new_locals, 0, prev.locals.length); |
jjg@283 | 257 | System.arraycopy(frame.locals, 0, new_locals, prev.locals.length, frame.locals.length); |
jjg@283 | 258 | StackMap m = new StackMap(new_locals, empty); |
jjg@283 | 259 | map.put(new_pc, m); |
jjg@283 | 260 | return new_pc; |
jjg@283 | 261 | } |
jjg@283 | 262 | |
jjg@283 | 263 | public Integer visit_full_frame(full_frame frame, Integer pc) { |
jjg@283 | 264 | int new_pc = pc + frame.getOffsetDelta() + 1; |
jjg@283 | 265 | StackMap m = new StackMap(frame.locals, frame.stack); |
jjg@283 | 266 | map.put(new_pc, m); |
jjg@283 | 267 | return new_pc; |
jjg@283 | 268 | } |
jjg@283 | 269 | |
jjg@283 | 270 | } |
jjg@283 | 271 | |
jjg@283 | 272 | class StackMap { |
jjg@283 | 273 | StackMap(verification_type_info[] locals, verification_type_info[] stack) { |
jjg@283 | 274 | this.locals = locals; |
jjg@283 | 275 | this.stack = stack; |
jjg@283 | 276 | } |
jjg@283 | 277 | |
jjg@283 | 278 | private final verification_type_info[] locals; |
jjg@283 | 279 | private final verification_type_info[] stack; |
jjg@283 | 280 | } |
jjg@283 | 281 | |
jjg@283 | 282 | class CustomVerificationTypeInfo extends verification_type_info { |
jjg@283 | 283 | public CustomVerificationTypeInfo(String text) { |
jjg@283 | 284 | super(-1); |
jjg@283 | 285 | this.text = text; |
jjg@283 | 286 | } |
jjg@283 | 287 | private String text; |
jjg@283 | 288 | } |
jjg@283 | 289 | |
jjg@283 | 290 | private final verification_type_info[] empty = { }; |
jjg@283 | 291 | } |