Mercurial > jdk8-mips64-public > hotspot / file revision
src/share/vm/interpreter/bytecode.hpp@f08d439fab8c
src/share/vm/interpreter/bytecode.hpp
Sun, 25 Sep 2011 16:03:29 -0700
- author
- never
- date
- Sun, 25 Sep 2011 16:03:29 -0700
- changeset 3156
- f08d439fab8c
- parent 2508
- b92c45f2bc75
- child 3251
- e342a5110bed
- permissions
- -rw-r--r--
7089790: integrate bsd-port changes
Reviewed-by: kvn, twisti, jrose
Contributed-by: Kurt Miller <kurt@intricatesoftware.com>, Greg Lewis <glewis@eyesbeyond.com>, Jung-uk Kim <jkim@freebsd.org>, Christos Zoulas <christos@zoulas.com>, Landon Fuller <landonf@plausible.coop>, The FreeBSD Foundation <board@freebsdfoundation.org>, Michael Franz <mvfranz@gmail.com>, Roger Hoover <rhoover@apple.com>, Alexander Strange <astrange@apple.com>
1 /*
2 * Copyright (c) 1997, 2011, 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 #ifndef SHARE_VM_INTERPRETER_BYTECODE_HPP
26 #define SHARE_VM_INTERPRETER_BYTECODE_HPP
28 #include "interpreter/bytecodes.hpp"
29 #include "memory/allocation.hpp"
30 #include "oops/methodOop.hpp"
31 #ifdef TARGET_ARCH_x86
32 # include "bytes_x86.hpp"
33 #endif
34 #ifdef TARGET_ARCH_sparc
35 # include "bytes_sparc.hpp"
36 #endif
37 #ifdef TARGET_ARCH_zero
38 # include "bytes_zero.hpp"
39 #endif
40 #ifdef TARGET_ARCH_arm
41 # include "bytes_arm.hpp"
42 #endif
43 #ifdef TARGET_ARCH_ppc
44 # include "bytes_ppc.hpp"
45 #endif
47 class ciBytecodeStream;
49 // The base class for different kinds of bytecode abstractions.
50 // Provides the primitive operations to manipulate code relative
51 // to the bcp.
53 class Bytecode: public StackObj {
54 protected:
55 const address _bcp;
56 const Bytecodes::Code _code;
58 // Address computation
59 address addr_at (int offset) const { return (address)_bcp + offset; }
60 u_char byte_at(int offset) const { return *addr_at(offset); }
61 address aligned_addr_at (int offset) const { return (address)round_to((intptr_t)addr_at(offset), jintSize); }
62 int aligned_offset (int offset) const { return aligned_addr_at(offset) - addr_at(0); }
64 // Word access:
65 int get_Java_u2_at (int offset) const { return Bytes::get_Java_u2(addr_at(offset)); }
66 int get_Java_u4_at (int offset) const { return Bytes::get_Java_u4(addr_at(offset)); }
67 int get_native_u2_at (int offset) const { return Bytes::get_native_u2(addr_at(offset)); }
68 int get_native_u4_at (int offset) const { return Bytes::get_native_u4(addr_at(offset)); }
70 public:
71 Bytecode(methodOop method, address bcp): _bcp(bcp), _code(Bytecodes::code_at(method, addr_at(0))) {
72 assert(method != NULL, "this form requires a valid methodOop");
73 }
74 // Defined in ciStreams.hpp
75 inline Bytecode(const ciBytecodeStream* stream, address bcp = NULL);
77 // Attributes
78 address bcp() const { return _bcp; }
79 int instruction_size() const { return Bytecodes::length_for_code_at(_code, bcp()); }
81 Bytecodes::Code code() const { return _code; }
82 Bytecodes::Code java_code() const { return Bytecodes::java_code(code()); }
84 // Static functions for parsing bytecodes in place.
85 int get_index_u1(Bytecodes::Code bc) const {
86 assert_same_format_as(bc); assert_index_size(1, bc);
87 return *(jubyte*)addr_at(1);
88 }
89 int get_index_u2(Bytecodes::Code bc, bool is_wide = false) const {
90 assert_same_format_as(bc, is_wide); assert_index_size(2, bc, is_wide);
91 address p = addr_at(is_wide ? 2 : 1);
92 if (can_use_native_byte_order(bc, is_wide))
93 return Bytes::get_native_u2(p);
94 else return Bytes::get_Java_u2(p);
95 }
96 int get_index_u1_cpcache(Bytecodes::Code bc) const {
97 assert_same_format_as(bc); assert_index_size(1, bc);
98 return *(jubyte*)addr_at(1) + constantPoolOopDesc::CPCACHE_INDEX_TAG;
99 }
100 int get_index_u2_cpcache(Bytecodes::Code bc) const {
101 assert_same_format_as(bc); assert_index_size(2, bc); assert_native_index(bc);
102 return Bytes::get_native_u2(addr_at(1)) + constantPoolOopDesc::CPCACHE_INDEX_TAG;
103 }
104 int get_index_u4(Bytecodes::Code bc) const {
105 assert_same_format_as(bc); assert_index_size(4, bc);
106 assert(can_use_native_byte_order(bc), "");
107 return Bytes::get_native_u4(addr_at(1));
108 }
109 bool has_index_u4(Bytecodes::Code bc) const {
110 return bc == Bytecodes::_invokedynamic;
111 }
113 int get_offset_s2(Bytecodes::Code bc) const {
114 assert_same_format_as(bc); assert_offset_size(2, bc);
115 return (jshort) Bytes::get_Java_u2(addr_at(1));
116 }
117 int get_offset_s4(Bytecodes::Code bc) const {
118 assert_same_format_as(bc); assert_offset_size(4, bc);
119 return (jint) Bytes::get_Java_u4(addr_at(1));
120 }
122 int get_constant_u1(int offset, Bytecodes::Code bc) const {
123 assert_same_format_as(bc); assert_constant_size(1, offset, bc);
124 return *(jbyte*)addr_at(offset);
125 }
126 int get_constant_u2(int offset, Bytecodes::Code bc, bool is_wide = false) const {
127 assert_same_format_as(bc, is_wide); assert_constant_size(2, offset, bc, is_wide);
128 return (jshort) Bytes::get_Java_u2(addr_at(offset));
129 }
131 // These are used locally and also from bytecode streams.
132 void assert_same_format_as(Bytecodes::Code testbc, bool is_wide = false) const NOT_DEBUG_RETURN;
133 static void assert_index_size(int required_size, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
134 static void assert_offset_size(int required_size, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
135 static void assert_constant_size(int required_size, int where, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
136 static void assert_native_index(Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
137 static bool can_use_native_byte_order(Bytecodes::Code bc, bool is_wide = false) {
138 return (!Bytes::is_Java_byte_ordering_different() || Bytecodes::native_byte_order(bc /*, is_wide*/));
139 }
140 };
143 // Abstractions for lookupswitch bytecode
144 class LookupswitchPair VALUE_OBJ_CLASS_SPEC {
145 private:
146 const address _bcp;
148 address addr_at (int offset) const { return _bcp + offset; }
149 int get_Java_u4_at (int offset) const { return Bytes::get_Java_u4(addr_at(offset)); }
151 public:
152 LookupswitchPair(address bcp): _bcp(bcp) {}
153 int match() const { return get_Java_u4_at(0 * jintSize); }
154 int offset() const { return get_Java_u4_at(1 * jintSize); }
155 };
158 class Bytecode_lookupswitch: public Bytecode {
159 public:
160 Bytecode_lookupswitch(methodOop method, address bcp): Bytecode(method, bcp) { verify(); }
161 // Defined in ciStreams.hpp
162 inline Bytecode_lookupswitch(const ciBytecodeStream* stream);
163 void verify() const PRODUCT_RETURN;
165 // Attributes
166 int default_offset() const { return get_Java_u4_at(aligned_offset(1 + 0*jintSize)); }
167 int number_of_pairs() const { return get_Java_u4_at(aligned_offset(1 + 1*jintSize)); }
168 LookupswitchPair pair_at(int i) const {
169 assert(0 <= i && i < number_of_pairs(), "pair index out of bounds");
170 return LookupswitchPair(aligned_addr_at(1 + (1 + i)*2*jintSize));
171 }
172 };
174 class Bytecode_tableswitch: public Bytecode {
175 public:
176 Bytecode_tableswitch(methodOop method, address bcp): Bytecode(method, bcp) { verify(); }
177 // Defined in ciStreams.hpp
178 inline Bytecode_tableswitch(const ciBytecodeStream* stream);
179 void verify() const PRODUCT_RETURN;
181 // Attributes
182 int default_offset() const { return get_Java_u4_at(aligned_offset(1 + 0*jintSize)); }
183 int low_key() const { return get_Java_u4_at(aligned_offset(1 + 1*jintSize)); }
184 int high_key() const { return get_Java_u4_at(aligned_offset(1 + 2*jintSize)); }
185 int dest_offset_at(int i) const;
186 int length() { return high_key()-low_key()+1; }
187 };
189 // Common code for decoding invokes and field references.
191 class Bytecode_member_ref: public Bytecode {
192 protected:
193 const methodHandle _method; // method containing the bytecode
195 Bytecode_member_ref(methodHandle method, int bci) : Bytecode(method(), method()->bcp_from(bci)), _method(method) {}
197 methodHandle method() const { return _method; }
199 public:
200 int index() const; // cache index (loaded from instruction)
201 int pool_index() const; // constant pool index
202 Symbol* name() const; // returns the name of the method or field
203 Symbol* signature() const; // returns the signature of the method or field
205 BasicType result_type() const; // returns the result type of the getfield or invoke
206 };
208 // Abstraction for invoke_{virtual, static, interface, special}
210 class Bytecode_invoke: public Bytecode_member_ref {
211 protected:
212 // Constructor that skips verification
213 Bytecode_invoke(methodHandle method, int bci, bool unused) : Bytecode_member_ref(method, bci) {}
215 public:
216 Bytecode_invoke(methodHandle method, int bci) : Bytecode_member_ref(method, bci) { verify(); }
217 void verify() const;
219 // Attributes
220 methodHandle static_target(TRAPS); // "specified" method (from constant pool)
222 // Testers
223 bool is_invokeinterface() const { return java_code() == Bytecodes::_invokeinterface; }
224 bool is_invokevirtual() const { return java_code() == Bytecodes::_invokevirtual; }
225 bool is_invokestatic() const { return java_code() == Bytecodes::_invokestatic; }
226 bool is_invokespecial() const { return java_code() == Bytecodes::_invokespecial; }
227 bool is_invokedynamic() const { return java_code() == Bytecodes::_invokedynamic; }
229 bool has_receiver() const { return !is_invokestatic() && !is_invokedynamic(); }
231 bool is_valid() const { return is_invokeinterface() ||
232 is_invokevirtual() ||
233 is_invokestatic() ||
234 is_invokespecial() ||
235 is_invokedynamic(); }
237 // Helper to skip verification. Used is_valid() to check if the result is really an invoke
238 inline friend Bytecode_invoke Bytecode_invoke_check(methodHandle method, int bci);
239 };
241 inline Bytecode_invoke Bytecode_invoke_check(methodHandle method, int bci) {
242 return Bytecode_invoke(method, bci, false);
243 }
246 // Abstraction for all field accesses (put/get field/static)
247 class Bytecode_field: public Bytecode_member_ref {
248 public:
249 Bytecode_field(methodHandle method, int bci) : Bytecode_member_ref(method, bci) { verify(); }
251 // Testers
252 bool is_getfield() const { return java_code() == Bytecodes::_getfield; }
253 bool is_putfield() const { return java_code() == Bytecodes::_putfield; }
254 bool is_getstatic() const { return java_code() == Bytecodes::_getstatic; }
255 bool is_putstatic() const { return java_code() == Bytecodes::_putstatic; }
257 bool is_getter() const { return is_getfield() || is_getstatic(); }
258 bool is_static() const { return is_getstatic() || is_putstatic(); }
260 bool is_valid() const { return is_getfield() ||
261 is_putfield() ||
262 is_getstatic() ||
263 is_putstatic(); }
264 void verify() const;
265 };
267 // Abstraction for checkcast
268 class Bytecode_checkcast: public Bytecode {
269 public:
270 Bytecode_checkcast(methodOop method, address bcp): Bytecode(method, bcp) { verify(); }
271 void verify() const { assert(Bytecodes::java_code(code()) == Bytecodes::_checkcast, "check checkcast"); }
273 // Returns index
274 long index() const { return get_index_u2(Bytecodes::_checkcast); };
275 };
277 // Abstraction for instanceof
278 class Bytecode_instanceof: public Bytecode {
279 public:
280 Bytecode_instanceof(methodOop method, address bcp): Bytecode(method, bcp) { verify(); }
281 void verify() const { assert(code() == Bytecodes::_instanceof, "check instanceof"); }
283 // Returns index
284 long index() const { return get_index_u2(Bytecodes::_instanceof); };
285 };
287 class Bytecode_new: public Bytecode {
288 public:
289 Bytecode_new(methodOop method, address bcp): Bytecode(method, bcp) { verify(); }
290 void verify() const { assert(java_code() == Bytecodes::_new, "check new"); }
292 // Returns index
293 long index() const { return get_index_u2(Bytecodes::_new); };
294 };
296 class Bytecode_multianewarray: public Bytecode {
297 public:
298 Bytecode_multianewarray(methodOop method, address bcp): Bytecode(method, bcp) { verify(); }
299 void verify() const { assert(java_code() == Bytecodes::_multianewarray, "check new"); }
301 // Returns index
302 long index() const { return get_index_u2(Bytecodes::_multianewarray); };
303 };
305 class Bytecode_anewarray: public Bytecode {
306 public:
307 Bytecode_anewarray(methodOop method, address bcp): Bytecode(method, bcp) { verify(); }
308 void verify() const { assert(java_code() == Bytecodes::_anewarray, "check anewarray"); }
310 // Returns index
311 long index() const { return get_index_u2(Bytecodes::_anewarray); };
312 };
314 // Abstraction for ldc, ldc_w and ldc2_w
315 class Bytecode_loadconstant: public Bytecode {
316 private:
317 const methodHandle _method;
319 int raw_index() const;
321 public:
322 Bytecode_loadconstant(methodHandle method, int bci): Bytecode(method(), method->bcp_from(bci)), _method(method) { verify(); }
324 void verify() const {
325 assert(_method.not_null(), "must supply method");
326 Bytecodes::Code stdc = Bytecodes::java_code(code());
327 assert(stdc == Bytecodes::_ldc ||
328 stdc == Bytecodes::_ldc_w ||
329 stdc == Bytecodes::_ldc2_w, "load constant");
330 }
332 // Only non-standard bytecodes (fast_aldc) have CP cache indexes.
333 bool has_cache_index() const { return code() >= Bytecodes::number_of_java_codes; }
335 int pool_index() const; // index into constant pool
336 int cache_index() const { // index into CP cache (or -1 if none)
337 return has_cache_index() ? raw_index() : -1;
338 }
340 BasicType result_type() const; // returns the result type of the ldc
342 oop resolve_constant(TRAPS) const;
343 };
345 #endif // SHARE_VM_INTERPRETER_BYTECODE_HPP
