Wed, 02 Jun 2010 22:45:42 -0700
Merge
1 /*
2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 // Base class for different kinds of abstractions working
26 // relative to an objects 'this' pointer.
28 class ThisRelativeObj VALUE_OBJ_CLASS_SPEC {
29 public:
30 // Address computation
31 address addr_at (int offset) const { return (address)this + offset; }
32 int byte_at (int offset) const { return *(addr_at(offset)); }
33 address aligned_addr_at (int offset) const { return (address)round_to((intptr_t)addr_at(offset), jintSize); }
34 int aligned_offset (int offset) const { return aligned_addr_at(offset) - addr_at(0); }
36 // Word access:
37 int get_Java_u2_at (int offset) const { return Bytes::get_Java_u2(addr_at(offset)); }
38 int get_Java_u4_at (int offset) const { return Bytes::get_Java_u4(addr_at(offset)); }
39 int get_native_u2_at (int offset) const { return Bytes::get_native_u2(addr_at(offset)); }
40 int get_native_u4_at (int offset) const { return Bytes::get_native_u4(addr_at(offset)); }
41 };
44 // The base class for different kinds of bytecode abstractions.
45 // Provides the primitive operations to manipulate code relative
46 // to an objects 'this' pointer.
47 // FIXME: Make this a ResourceObj, include the enclosing methodOop, and cache the opcode.
49 class Bytecode: public ThisRelativeObj {
50 protected:
51 u_char byte_at(int offset) const { return *addr_at(offset); }
52 bool check_must_rewrite(Bytecodes::Code bc) const;
54 public:
55 // Attributes
56 address bcp() const { return addr_at(0); }
57 int instruction_size() const { return Bytecodes::length_at(bcp()); }
59 // Warning: Use code() with caution on live bytecode streams. 4926272
60 Bytecodes::Code code() const { return Bytecodes::code_at(addr_at(0)); }
61 Bytecodes::Code java_code() const { return Bytecodes::java_code(code()); }
62 bool must_rewrite(Bytecodes::Code code) const { return Bytecodes::can_rewrite(code) && check_must_rewrite(code); }
64 // Creation
65 inline friend Bytecode* Bytecode_at(address bcp);
67 // Static functions for parsing bytecodes in place.
68 int get_index_u1(Bytecodes::Code bc) const {
69 assert_same_format_as(bc); assert_index_size(1, bc);
70 return *(jubyte*)addr_at(1);
71 }
72 int get_index_u2(Bytecodes::Code bc, bool is_wide = false) const {
73 assert_same_format_as(bc, is_wide); assert_index_size(2, bc, is_wide);
74 address p = addr_at(is_wide ? 2 : 1);
75 if (can_use_native_byte_order(bc, is_wide))
76 return Bytes::get_native_u2(p);
77 else return Bytes::get_Java_u2(p);
78 }
79 int get_index_u2_cpcache(Bytecodes::Code bc) const {
80 assert_same_format_as(bc); assert_index_size(2, bc); assert_native_index(bc);
81 return Bytes::get_native_u2(addr_at(1)) DEBUG_ONLY(+ constantPoolOopDesc::CPCACHE_INDEX_TAG);
82 }
83 int get_index_u4(Bytecodes::Code bc) const {
84 assert_same_format_as(bc); assert_index_size(4, bc);
85 assert(can_use_native_byte_order(bc), "");
86 return Bytes::get_native_u4(addr_at(1));
87 }
88 bool has_index_u4(Bytecodes::Code bc) const {
89 return bc == Bytecodes::_invokedynamic;
90 }
92 int get_offset_s2(Bytecodes::Code bc) const {
93 assert_same_format_as(bc); assert_offset_size(2, bc);
94 return (jshort) Bytes::get_Java_u2(addr_at(1));
95 }
96 int get_offset_s4(Bytecodes::Code bc) const {
97 assert_same_format_as(bc); assert_offset_size(4, bc);
98 return (jint) Bytes::get_Java_u4(addr_at(1));
99 }
101 int get_constant_u1(int offset, Bytecodes::Code bc) const {
102 assert_same_format_as(bc); assert_constant_size(1, offset, bc);
103 return *(jbyte*)addr_at(offset);
104 }
105 int get_constant_u2(int offset, Bytecodes::Code bc, bool is_wide = false) const {
106 assert_same_format_as(bc, is_wide); assert_constant_size(2, offset, bc, is_wide);
107 return (jshort) Bytes::get_Java_u2(addr_at(offset));
108 }
110 // These are used locally and also from bytecode streams.
111 void assert_same_format_as(Bytecodes::Code testbc, bool is_wide = false) const NOT_DEBUG_RETURN;
112 static void assert_index_size(int required_size, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
113 static void assert_offset_size(int required_size, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
114 static void assert_constant_size(int required_size, int where, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
115 static void assert_native_index(Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
116 static bool can_use_native_byte_order(Bytecodes::Code bc, bool is_wide = false) {
117 return (!Bytes::is_Java_byte_ordering_different() || Bytecodes::native_byte_order(bc /*, is_wide*/));
118 }
119 };
121 inline Bytecode* Bytecode_at(address bcp) {
122 // Warning: Use with caution on live bytecode streams. 4926272
123 return (Bytecode*)bcp;
124 }
127 // Abstractions for lookupswitch bytecode
129 class LookupswitchPair: ThisRelativeObj {
130 private:
131 int _match;
132 int _offset;
134 public:
135 int match() const { return get_Java_u4_at(0 * jintSize); }
136 int offset() const { return get_Java_u4_at(1 * jintSize); }
137 };
140 class Bytecode_lookupswitch: public Bytecode {
141 public:
142 void verify() const PRODUCT_RETURN;
144 // Attributes
145 int default_offset() const { return get_Java_u4_at(aligned_offset(1 + 0*jintSize)); }
146 int number_of_pairs() const { return get_Java_u4_at(aligned_offset(1 + 1*jintSize)); }
147 LookupswitchPair* pair_at(int i) const { assert(0 <= i && i < number_of_pairs(), "pair index out of bounds");
148 return (LookupswitchPair*)aligned_addr_at(1 + (1 + i)*2*jintSize); }
149 // Creation
150 inline friend Bytecode_lookupswitch* Bytecode_lookupswitch_at(address bcp);
151 };
153 inline Bytecode_lookupswitch* Bytecode_lookupswitch_at(address bcp) {
154 Bytecode_lookupswitch* b = (Bytecode_lookupswitch*)bcp;
155 debug_only(b->verify());
156 return b;
157 }
160 class Bytecode_tableswitch: public Bytecode {
161 public:
162 void verify() const PRODUCT_RETURN;
164 // Attributes
165 int default_offset() const { return get_Java_u4_at(aligned_offset(1 + 0*jintSize)); }
166 int low_key() const { return get_Java_u4_at(aligned_offset(1 + 1*jintSize)); }
167 int high_key() const { return get_Java_u4_at(aligned_offset(1 + 2*jintSize)); }
168 int dest_offset_at(int i) const;
169 int length() { return high_key()-low_key()+1; }
171 // Creation
172 inline friend Bytecode_tableswitch* Bytecode_tableswitch_at(address bcp);
173 };
175 inline Bytecode_tableswitch* Bytecode_tableswitch_at(address bcp) {
176 Bytecode_tableswitch* b = (Bytecode_tableswitch*)bcp;
177 debug_only(b->verify());
178 return b;
179 }
182 // Abstraction for invoke_{virtual, static, interface, special}
184 class Bytecode_invoke: public ResourceObj {
185 protected:
186 methodHandle _method; // method containing the bytecode
187 int _bci; // position of the bytecode
189 Bytecode_invoke(methodHandle method, int bci) : _method(method), _bci(bci) {}
191 public:
192 void verify() const;
194 // Attributes
195 methodHandle method() const { return _method; }
196 int bci() const { return _bci; }
197 address bcp() const { return _method->bcp_from(bci()); }
199 int index() const; // the constant pool index for the invoke
200 symbolOop name() const; // returns the name of the invoked method
201 symbolOop signature() const; // returns the signature of the invoked method
202 BasicType result_type(Thread *thread) const; // returns the result type of the invoke
204 Bytecodes::Code code() const { return Bytecodes::code_at(bcp(), _method()); }
205 Bytecodes::Code adjusted_invoke_code() const { return Bytecodes::java_code(code()); }
207 methodHandle static_target(TRAPS); // "specified" method (from constant pool)
209 // Testers
210 bool is_invokeinterface() const { return adjusted_invoke_code() == Bytecodes::_invokeinterface; }
211 bool is_invokevirtual() const { return adjusted_invoke_code() == Bytecodes::_invokevirtual; }
212 bool is_invokestatic() const { return adjusted_invoke_code() == Bytecodes::_invokestatic; }
213 bool is_invokespecial() const { return adjusted_invoke_code() == Bytecodes::_invokespecial; }
214 bool is_invokedynamic() const { return adjusted_invoke_code() == Bytecodes::_invokedynamic; }
216 bool has_receiver() const { return !is_invokestatic() && !is_invokedynamic(); }
218 bool is_valid() const { return is_invokeinterface() ||
219 is_invokevirtual() ||
220 is_invokestatic() ||
221 is_invokespecial() ||
222 is_invokedynamic(); }
224 // Creation
225 inline friend Bytecode_invoke* Bytecode_invoke_at(methodHandle method, int bci);
227 // Like Bytecode_invoke_at. Instead it returns NULL if the bci is not at an invoke.
228 inline friend Bytecode_invoke* Bytecode_invoke_at_check(methodHandle method, int bci);
229 };
231 inline Bytecode_invoke* Bytecode_invoke_at(methodHandle method, int bci) {
232 Bytecode_invoke* b = new Bytecode_invoke(method, bci);
233 debug_only(b->verify());
234 return b;
235 }
237 inline Bytecode_invoke* Bytecode_invoke_at_check(methodHandle method, int bci) {
238 Bytecode_invoke* b = new Bytecode_invoke(method, bci);
239 return b->is_valid() ? b : NULL;
240 }
243 // Abstraction for all field accesses (put/get field/static_
244 class Bytecode_field: public Bytecode {
245 public:
246 void verify() const;
248 int index() const;
249 bool is_static() const;
251 // Creation
252 inline friend Bytecode_field* Bytecode_field_at(const methodOop method, address bcp);
253 };
255 inline Bytecode_field* Bytecode_field_at(const methodOop method, address bcp) {
256 Bytecode_field* b = (Bytecode_field*)bcp;
257 debug_only(b->verify());
258 return b;
259 }
262 // Abstraction for checkcast
264 class Bytecode_checkcast: public Bytecode {
265 public:
266 void verify() const { assert(Bytecodes::java_code(code()) == Bytecodes::_checkcast, "check checkcast"); }
268 // Returns index
269 long index() const { return get_index_u2(Bytecodes::_checkcast); };
271 // Creation
272 inline friend Bytecode_checkcast* Bytecode_checkcast_at(address bcp);
273 };
275 inline Bytecode_checkcast* Bytecode_checkcast_at(address bcp) {
276 Bytecode_checkcast* b = (Bytecode_checkcast*)bcp;
277 debug_only(b->verify());
278 return b;
279 }
282 // Abstraction for instanceof
284 class Bytecode_instanceof: public Bytecode {
285 public:
286 void verify() const { assert(code() == Bytecodes::_instanceof, "check instanceof"); }
288 // Returns index
289 long index() const { return get_index_u2(Bytecodes::_instanceof); };
291 // Creation
292 inline friend Bytecode_instanceof* Bytecode_instanceof_at(address bcp);
293 };
295 inline Bytecode_instanceof* Bytecode_instanceof_at(address bcp) {
296 Bytecode_instanceof* b = (Bytecode_instanceof*)bcp;
297 debug_only(b->verify());
298 return b;
299 }
302 class Bytecode_new: public Bytecode {
303 public:
304 void verify() const { assert(java_code() == Bytecodes::_new, "check new"); }
306 // Returns index
307 long index() const { return get_index_u2(Bytecodes::_new); };
309 // Creation
310 inline friend Bytecode_new* Bytecode_new_at(address bcp);
311 };
313 inline Bytecode_new* Bytecode_new_at(address bcp) {
314 Bytecode_new* b = (Bytecode_new*)bcp;
315 debug_only(b->verify());
316 return b;
317 }
320 class Bytecode_multianewarray: public Bytecode {
321 public:
322 void verify() const { assert(java_code() == Bytecodes::_multianewarray, "check new"); }
324 // Returns index
325 long index() const { return get_index_u2(Bytecodes::_multianewarray); };
327 // Creation
328 inline friend Bytecode_multianewarray* Bytecode_multianewarray_at(address bcp);
329 };
331 inline Bytecode_multianewarray* Bytecode_multianewarray_at(address bcp) {
332 Bytecode_multianewarray* b = (Bytecode_multianewarray*)bcp;
333 debug_only(b->verify());
334 return b;
335 }
338 class Bytecode_anewarray: public Bytecode {
339 public:
340 void verify() const { assert(java_code() == Bytecodes::_anewarray, "check anewarray"); }
342 // Returns index
343 long index() const { return get_index_u2(Bytecodes::_anewarray); };
345 // Creation
346 inline friend Bytecode_anewarray* Bytecode_anewarray_at(address bcp);
347 };
349 inline Bytecode_anewarray* Bytecode_anewarray_at(address bcp) {
350 Bytecode_anewarray* b = (Bytecode_anewarray*)bcp;
351 debug_only(b->verify());
352 return b;
353 }
356 // Abstraction for ldc, ldc_w and ldc2_w
358 class Bytecode_loadconstant: public Bytecode {
359 public:
360 void verify() const {
361 Bytecodes::Code stdc = Bytecodes::java_code(code());
362 assert(stdc == Bytecodes::_ldc ||
363 stdc == Bytecodes::_ldc_w ||
364 stdc == Bytecodes::_ldc2_w, "load constant");
365 }
367 int index() const;
369 inline friend Bytecode_loadconstant* Bytecode_loadconstant_at(const methodOop method, address bcp);
370 };
372 inline Bytecode_loadconstant* Bytecode_loadconstant_at(const methodOop method, address bcp) {
373 Bytecode_loadconstant* b = (Bytecode_loadconstant*)bcp;
374 debug_only(b->verify());
375 return b;
376 }