Wed, 03 Jul 2019 20:42:37 +0800
Merge
1 /*
2 * Copyright (c) 1997, 2012, 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 /*
26 * This file has been modified by Loongson Technology in 2015. These
27 * modifications are Copyright (c) 2015 Loongson Technology, and are made
28 * available on the same license terms set forth above.
29 */
31 #ifndef SHARE_VM_INTERPRETER_BYTECODE_HPP
32 #define SHARE_VM_INTERPRETER_BYTECODE_HPP
34 #include "interpreter/bytecodes.hpp"
35 #include "memory/allocation.hpp"
36 #include "oops/method.hpp"
37 #ifdef TARGET_ARCH_x86
38 # include "bytes_x86.hpp"
39 #endif
40 #ifdef TARGET_ARCH_mips
41 # include "bytes_mips.hpp"
42 #endif
43 #ifdef TARGET_ARCH_sparc
44 # include "bytes_sparc.hpp"
45 #endif
46 #ifdef TARGET_ARCH_zero
47 # include "bytes_zero.hpp"
48 #endif
49 #ifdef TARGET_ARCH_arm
50 # include "bytes_arm.hpp"
51 #endif
52 #ifdef TARGET_ARCH_ppc
53 # include "bytes_ppc.hpp"
54 #endif
56 class ciBytecodeStream;
58 // The base class for different kinds of bytecode abstractions.
59 // Provides the primitive operations to manipulate code relative
60 // to the bcp.
62 class Bytecode: public StackObj {
63 protected:
64 const address _bcp;
65 const Bytecodes::Code _code;
67 // Address computation
68 address addr_at (int offset) const { return (address)_bcp + offset; }
69 u_char byte_at(int offset) const { return *addr_at(offset); }
70 address aligned_addr_at (int offset) const { return (address)round_to((intptr_t)addr_at(offset), jintSize); }
71 int aligned_offset (int offset) const { return aligned_addr_at(offset) - addr_at(0); }
73 // Word access:
74 int get_Java_u2_at (int offset) const { return Bytes::get_Java_u2(addr_at(offset)); }
75 int get_Java_u4_at (int offset) const { return Bytes::get_Java_u4(addr_at(offset)); }
76 int get_native_u2_at (int offset) const { return Bytes::get_native_u2(addr_at(offset)); }
77 int get_native_u4_at (int offset) const { return Bytes::get_native_u4(addr_at(offset)); }
79 public:
80 Bytecode(Method* method, address bcp): _bcp(bcp), _code(Bytecodes::code_at(method, addr_at(0))) {
81 assert(method != NULL, "this form requires a valid Method*");
82 }
83 // Defined in ciStreams.hpp
84 inline Bytecode(const ciBytecodeStream* stream, address bcp = NULL);
86 // Attributes
87 address bcp() const { return _bcp; }
88 int instruction_size() const { return Bytecodes::length_for_code_at(_code, bcp()); }
90 Bytecodes::Code code() const { return _code; }
91 Bytecodes::Code java_code() const { return Bytecodes::java_code(code()); }
92 Bytecodes::Code invoke_code() const { return (code() == Bytecodes::_invokehandle) ? code() : java_code(); }
94 // Static functions for parsing bytecodes in place.
95 int get_index_u1(Bytecodes::Code bc) const {
96 assert_same_format_as(bc); assert_index_size(1, bc);
97 return *(jubyte*)addr_at(1);
98 }
99 int get_index_u2(Bytecodes::Code bc, bool is_wide = false) const {
100 assert_same_format_as(bc, is_wide); assert_index_size(2, bc, is_wide);
101 address p = addr_at(is_wide ? 2 : 1);
102 if (can_use_native_byte_order(bc, is_wide))
103 return Bytes::get_native_u2(p);
104 else return Bytes::get_Java_u2(p);
105 }
106 int get_index_u1_cpcache(Bytecodes::Code bc) const {
107 assert_same_format_as(bc); assert_index_size(1, bc);
108 return *(jubyte*)addr_at(1) + ConstantPool::CPCACHE_INDEX_TAG;
109 }
110 int get_index_u2_cpcache(Bytecodes::Code bc) const {
111 assert_same_format_as(bc); assert_index_size(2, bc); assert_native_index(bc);
112 return Bytes::get_native_u2(addr_at(1)) + ConstantPool::CPCACHE_INDEX_TAG;
113 }
114 int get_index_u4(Bytecodes::Code bc) const {
115 assert_same_format_as(bc); assert_index_size(4, bc);
116 assert(can_use_native_byte_order(bc), "");
117 return Bytes::get_native_u4(addr_at(1));
118 }
119 bool has_index_u4(Bytecodes::Code bc) const {
120 return bc == Bytecodes::_invokedynamic;
121 }
123 int get_offset_s2(Bytecodes::Code bc) const {
124 assert_same_format_as(bc); assert_offset_size(2, bc);
125 return (jshort) Bytes::get_Java_u2(addr_at(1));
126 }
127 int get_offset_s4(Bytecodes::Code bc) const {
128 assert_same_format_as(bc); assert_offset_size(4, bc);
129 return (jint) Bytes::get_Java_u4(addr_at(1));
130 }
132 int get_constant_u1(int offset, Bytecodes::Code bc) const {
133 assert_same_format_as(bc); assert_constant_size(1, offset, bc);
134 return *(jbyte*)addr_at(offset);
135 }
136 int get_constant_u2(int offset, Bytecodes::Code bc, bool is_wide = false) const {
137 assert_same_format_as(bc, is_wide); assert_constant_size(2, offset, bc, is_wide);
138 return (jshort) Bytes::get_Java_u2(addr_at(offset));
139 }
141 // These are used locally and also from bytecode streams.
142 void assert_same_format_as(Bytecodes::Code testbc, bool is_wide = false) const NOT_DEBUG_RETURN;
143 static void assert_index_size(int required_size, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
144 static void assert_offset_size(int required_size, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
145 static void assert_constant_size(int required_size, int where, Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
146 static void assert_native_index(Bytecodes::Code bc, bool is_wide = false) NOT_DEBUG_RETURN;
147 static bool can_use_native_byte_order(Bytecodes::Code bc, bool is_wide = false) {
148 return (!Bytes::is_Java_byte_ordering_different() || Bytecodes::native_byte_order(bc /*, is_wide*/));
149 }
150 };
153 // Abstractions for lookupswitch bytecode
154 class LookupswitchPair VALUE_OBJ_CLASS_SPEC {
155 private:
156 const address _bcp;
158 address addr_at (int offset) const { return _bcp + offset; }
159 int get_Java_u4_at (int offset) const { return Bytes::get_Java_u4(addr_at(offset)); }
161 public:
162 LookupswitchPair(address bcp): _bcp(bcp) {}
163 int match() const { return get_Java_u4_at(0 * jintSize); }
164 int offset() const { return get_Java_u4_at(1 * jintSize); }
165 };
168 class Bytecode_lookupswitch: public Bytecode {
169 public:
170 Bytecode_lookupswitch(Method* method, address bcp): Bytecode(method, bcp) { verify(); }
171 // Defined in ciStreams.hpp
172 inline Bytecode_lookupswitch(const ciBytecodeStream* stream);
173 void verify() const PRODUCT_RETURN;
175 // Attributes
176 int default_offset() const { return get_Java_u4_at(aligned_offset(1 + 0*jintSize)); }
177 int number_of_pairs() const { return get_Java_u4_at(aligned_offset(1 + 1*jintSize)); }
178 LookupswitchPair pair_at(int i) const {
179 assert(0 <= i && i < number_of_pairs(), "pair index out of bounds");
180 return LookupswitchPair(aligned_addr_at(1 + (1 + i)*2*jintSize));
181 }
182 };
184 class Bytecode_tableswitch: public Bytecode {
185 public:
186 Bytecode_tableswitch(Method* method, address bcp): Bytecode(method, bcp) { verify(); }
187 // Defined in ciStreams.hpp
188 inline Bytecode_tableswitch(const ciBytecodeStream* stream);
189 void verify() const PRODUCT_RETURN;
191 // Attributes
192 int default_offset() const { return get_Java_u4_at(aligned_offset(1 + 0*jintSize)); }
193 int low_key() const { return get_Java_u4_at(aligned_offset(1 + 1*jintSize)); }
194 int high_key() const { return get_Java_u4_at(aligned_offset(1 + 2*jintSize)); }
195 int dest_offset_at(int i) const;
196 int length() { return high_key()-low_key()+1; }
197 };
199 // Common code for decoding invokes and field references.
201 class Bytecode_member_ref: public Bytecode {
202 protected:
203 const methodHandle _method; // method containing the bytecode
205 Bytecode_member_ref(methodHandle method, int bci) : Bytecode(method(), method()->bcp_from(bci)), _method(method) {}
207 methodHandle method() const { return _method; }
208 ConstantPool* constants() const { return _method->constants(); }
209 ConstantPoolCache* cpcache() const { return _method->constants()->cache(); }
210 ConstantPoolCacheEntry* cpcache_entry() const;
212 public:
213 int index() const; // cache index (loaded from instruction)
214 int pool_index() const; // constant pool index
215 Symbol* klass() const; // returns the klass of the method or field
216 Symbol* name() const; // returns the name of the method or field
217 Symbol* signature() const; // returns the signature of the method or field
219 BasicType result_type() const; // returns the result type of the getfield or invoke
220 };
222 // Abstraction for invoke_{virtual, static, interface, special}
224 class Bytecode_invoke: public Bytecode_member_ref {
225 protected:
226 // Constructor that skips verification
227 Bytecode_invoke(methodHandle method, int bci, bool unused) : Bytecode_member_ref(method, bci) {}
229 public:
230 Bytecode_invoke(methodHandle method, int bci) : Bytecode_member_ref(method, bci) { verify(); }
231 void verify() const;
233 // Attributes
234 methodHandle static_target(TRAPS); // "specified" method (from constant pool)
235 Handle appendix(TRAPS); // if CPCE::has_appendix (from constant pool)
237 // Testers
238 bool is_invokeinterface() const { return invoke_code() == Bytecodes::_invokeinterface; }
239 bool is_invokevirtual() const { return invoke_code() == Bytecodes::_invokevirtual; }
240 bool is_invokestatic() const { return invoke_code() == Bytecodes::_invokestatic; }
241 bool is_invokespecial() const { return invoke_code() == Bytecodes::_invokespecial; }
242 bool is_invokedynamic() const { return invoke_code() == Bytecodes::_invokedynamic; }
243 bool is_invokehandle() const { return invoke_code() == Bytecodes::_invokehandle; }
245 bool has_receiver() const { return !is_invokestatic() && !is_invokedynamic(); }
247 bool is_valid() const { return is_invokeinterface() ||
248 is_invokevirtual() ||
249 is_invokestatic() ||
250 is_invokespecial() ||
251 is_invokedynamic() ||
252 is_invokehandle(); }
254 bool has_appendix() { return cpcache_entry()->has_appendix(); }
256 private:
257 // Helper to skip verification. Used is_valid() to check if the result is really an invoke
258 inline friend Bytecode_invoke Bytecode_invoke_check(methodHandle method, int bci);
259 };
261 inline Bytecode_invoke Bytecode_invoke_check(methodHandle method, int bci) {
262 return Bytecode_invoke(method, bci, false);
263 }
266 // Abstraction for all field accesses (put/get field/static)
267 class Bytecode_field: public Bytecode_member_ref {
268 public:
269 Bytecode_field(methodHandle method, int bci) : Bytecode_member_ref(method, bci) { verify(); }
271 // Testers
272 bool is_getfield() const { return java_code() == Bytecodes::_getfield; }
273 bool is_putfield() const { return java_code() == Bytecodes::_putfield; }
274 bool is_getstatic() const { return java_code() == Bytecodes::_getstatic; }
275 bool is_putstatic() const { return java_code() == Bytecodes::_putstatic; }
277 bool is_getter() const { return is_getfield() || is_getstatic(); }
278 bool is_static() const { return is_getstatic() || is_putstatic(); }
280 bool is_valid() const { return is_getfield() ||
281 is_putfield() ||
282 is_getstatic() ||
283 is_putstatic(); }
284 void verify() const;
285 };
287 // Abstraction for checkcast
288 class Bytecode_checkcast: public Bytecode {
289 public:
290 Bytecode_checkcast(Method* method, address bcp): Bytecode(method, bcp) { verify(); }
291 void verify() const { assert(Bytecodes::java_code(code()) == Bytecodes::_checkcast, "check checkcast"); }
293 // Returns index
294 long index() const { return get_index_u2(Bytecodes::_checkcast); };
295 };
297 // Abstraction for instanceof
298 class Bytecode_instanceof: public Bytecode {
299 public:
300 Bytecode_instanceof(Method* method, address bcp): Bytecode(method, bcp) { verify(); }
301 void verify() const { assert(code() == Bytecodes::_instanceof, "check instanceof"); }
303 // Returns index
304 long index() const { return get_index_u2(Bytecodes::_instanceof); };
305 };
307 class Bytecode_new: public Bytecode {
308 public:
309 Bytecode_new(Method* method, address bcp): Bytecode(method, bcp) { verify(); }
310 void verify() const { assert(java_code() == Bytecodes::_new, "check new"); }
312 // Returns index
313 long index() const { return get_index_u2(Bytecodes::_new); };
314 };
316 class Bytecode_multianewarray: public Bytecode {
317 public:
318 Bytecode_multianewarray(Method* method, address bcp): Bytecode(method, bcp) { verify(); }
319 void verify() const { assert(java_code() == Bytecodes::_multianewarray, "check new"); }
321 // Returns index
322 long index() const { return get_index_u2(Bytecodes::_multianewarray); };
323 };
325 class Bytecode_anewarray: public Bytecode {
326 public:
327 Bytecode_anewarray(Method* method, address bcp): Bytecode(method, bcp) { verify(); }
328 void verify() const { assert(java_code() == Bytecodes::_anewarray, "check anewarray"); }
330 // Returns index
331 long index() const { return get_index_u2(Bytecodes::_anewarray); };
332 };
334 // Abstraction for ldc, ldc_w and ldc2_w
335 class Bytecode_loadconstant: public Bytecode {
336 private:
337 const methodHandle _method;
339 int raw_index() const;
341 public:
342 Bytecode_loadconstant(methodHandle method, int bci): Bytecode(method(), method->bcp_from(bci)), _method(method) { verify(); }
344 void verify() const {
345 assert(_method.not_null(), "must supply method");
346 Bytecodes::Code stdc = Bytecodes::java_code(code());
347 assert(stdc == Bytecodes::_ldc ||
348 stdc == Bytecodes::_ldc_w ||
349 stdc == Bytecodes::_ldc2_w, "load constant");
350 }
352 // Only non-standard bytecodes (fast_aldc) have reference cache indexes.
353 bool has_cache_index() const { return code() >= Bytecodes::number_of_java_codes; }
355 int pool_index() const; // index into constant pool
356 int cache_index() const { // index into reference cache (or -1 if none)
357 return has_cache_index() ? raw_index() : -1;
358 }
360 BasicType result_type() const; // returns the result type of the ldc
362 oop resolve_constant(TRAPS) const;
363 };
365 #endif // SHARE_VM_INTERPRETER_BYTECODE_HPP