1 /*
2 * Copyright 1997-2010 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 // StubRoutines provides entry points to assembly routines used by
26 // compiled code and the run-time system. Platform-specific entry
27 // points are defined in the platform-specific inner class.
28 //
29 // Class scheme:
30 //
31 // platform-independent platform-dependent
32 //
33 // stubRoutines.hpp <-- included -- stubRoutines_<arch>.hpp
34 // ^ ^
35 // | |
36 // implements implements
37 // | |
38 // | |
39 // stubRoutines.cpp stubRoutines_<arch>.cpp
40 // stubRoutines_<os_family>.cpp stubGenerator_<arch>.cpp
41 // stubRoutines_<os_arch>.cpp
42 //
43 // Note 1: The important thing is a clean decoupling between stub
44 // entry points (interfacing to the whole vm; i.e., 1-to-n
45 // relationship) and stub generators (interfacing only to
46 // the entry points implementation; i.e., 1-to-1 relationship).
47 // This significantly simplifies changes in the generator
48 // structure since the rest of the vm is not affected.
49 //
50 // Note 2: stubGenerator_<arch>.cpp contains a minimal portion of
51 // machine-independent code; namely the generator calls of
52 // the generator functions that are used platform-independently.
53 // However, it comes with the advantage of having a 1-file
54 // implementation of the generator. It should be fairly easy
55 // to change, should it become a problem later.
56 //
57 // Scheme for adding a new entry point:
58 //
59 // 1. determine if it's a platform-dependent or independent entry point
60 // a) if platform independent: make subsequent changes in the independent files
61 // b) if platform dependent: make subsequent changes in the dependent files
62 // 2. add a private instance variable holding the entry point address
63 // 3. add a public accessor function to the instance variable
64 // 4. implement the corresponding generator function in the platform-dependent
65 // stubGenerator_<arch>.cpp file and call the function in generate_all() of that file
66
67
68 class StubRoutines: AllStatic {
69
70 public:
71 enum platform_independent_constants {
72 max_size_of_parameters = 256 // max. parameter size supported by megamorphic lookups
73 };
74
75 // Dependencies
76 friend class StubGenerator;
77 #include "incls/_stubRoutines_pd.hpp.incl" // machine-specific parts
78
79 static jint _verify_oop_count;
80 static address _verify_oop_subroutine_entry;
81
82 static address _call_stub_return_address; // the return PC, when returning to a call stub
83 static address _call_stub_entry;
84 static address _forward_exception_entry;
85 static address _catch_exception_entry;
86 static address _throw_AbstractMethodError_entry;
87 static address _throw_IncompatibleClassChangeError_entry;
88 static address _throw_ArithmeticException_entry;
89 static address _throw_NullPointerException_entry;
90 static address _throw_NullPointerException_at_call_entry;
91 static address _throw_StackOverflowError_entry;
92 static address _handler_for_unsafe_access_entry;
93
94 static address _atomic_xchg_entry;
95 static address _atomic_xchg_ptr_entry;
96 static address _atomic_store_entry;
97 static address _atomic_store_ptr_entry;
98 static address _atomic_cmpxchg_entry;
99 static address _atomic_cmpxchg_ptr_entry;
100 static address _atomic_cmpxchg_long_entry;
101 static address _atomic_add_entry;
102 static address _atomic_add_ptr_entry;
103 static address _fence_entry;
104 static address _d2i_wrapper;
105 static address _d2l_wrapper;
106
107 static jint _fpu_cntrl_wrd_std;
108 static jint _fpu_cntrl_wrd_24;
109 static jint _fpu_cntrl_wrd_64;
110 static jint _fpu_cntrl_wrd_trunc;
111 static jint _mxcsr_std;
112 static jint _fpu_subnormal_bias1[3];
113 static jint _fpu_subnormal_bias2[3];
114
115 static BufferBlob* _code1; // code buffer for initial routines
116 static BufferBlob* _code2; // code buffer for all other routines
117
118 // Leaf routines which implement arraycopy and their addresses
119 // arraycopy operands aligned on element type boundary
120 static address _jbyte_arraycopy;
121 static address _jshort_arraycopy;
122 static address _jint_arraycopy;
123 static address _jlong_arraycopy;
124 static address _oop_arraycopy;
125 static address _jbyte_disjoint_arraycopy;
126 static address _jshort_disjoint_arraycopy;
127 static address _jint_disjoint_arraycopy;
128 static address _jlong_disjoint_arraycopy;
129 static address _oop_disjoint_arraycopy;
130
131 // arraycopy operands aligned on zero'th element boundary
132 // These are identical to the ones aligned aligned on an
133 // element type boundary, except that they assume that both
134 // source and destination are HeapWord aligned.
135 static address _arrayof_jbyte_arraycopy;
136 static address _arrayof_jshort_arraycopy;
137 static address _arrayof_jint_arraycopy;
138 static address _arrayof_jlong_arraycopy;
139 static address _arrayof_oop_arraycopy;
140 static address _arrayof_jbyte_disjoint_arraycopy;
141 static address _arrayof_jshort_disjoint_arraycopy;
142 static address _arrayof_jint_disjoint_arraycopy;
143 static address _arrayof_jlong_disjoint_arraycopy;
144 static address _arrayof_oop_disjoint_arraycopy;
145
146 // these are recommended but optional:
147 static address _checkcast_arraycopy;
148 static address _unsafe_arraycopy;
149 static address _generic_arraycopy;
150
151 // These are versions of the java.lang.Math methods which perform
152 // the same operations as the intrinsic version. They are used for
153 // constant folding in the compiler to ensure equivalence. If the
154 // intrinsic version returns the same result as the strict version
155 // then they can be set to the appropriate function from
156 // SharedRuntime.
157 static double (*_intrinsic_log)(double);
158 static double (*_intrinsic_log10)(double);
159 static double (*_intrinsic_exp)(double);
160 static double (*_intrinsic_pow)(double, double);
161 static double (*_intrinsic_sin)(double);
162 static double (*_intrinsic_cos)(double);
163 static double (*_intrinsic_tan)(double);
164
165 public:
166 // Initialization/Testing
167 static void initialize1(); // must happen before universe::genesis
168 static void initialize2(); // must happen after universe::genesis
169
170 static bool contains(address addr) {
171 return
172 (_code1 != NULL && _code1->blob_contains(addr)) ||
173 (_code2 != NULL && _code2->blob_contains(addr)) ;
174 }
175
176 // Debugging
177 static jint verify_oop_count() { return _verify_oop_count; }
178 static jint* verify_oop_count_addr() { return &_verify_oop_count; }
179 // a subroutine for debugging the GC
180 static address verify_oop_subroutine_entry_address() { return (address)&_verify_oop_subroutine_entry; }
181
182 static address catch_exception_entry() { return _catch_exception_entry; }
183
184 // Calls to Java
185 typedef void (*CallStub)(
186 address link,
187 intptr_t* result,
188 BasicType result_type,
189 methodOopDesc* method,
190 address entry_point,
191 intptr_t* parameters,
192 int size_of_parameters,
193 TRAPS
194 );
195
196 static CallStub call_stub() { return CAST_TO_FN_PTR(CallStub, _call_stub_entry); }
197
198 // Exceptions
199 static address forward_exception_entry() { return _forward_exception_entry; }
200 // Implicit exceptions
201 static address throw_AbstractMethodError_entry() { return _throw_AbstractMethodError_entry; }
202 static address throw_IncompatibleClassChangeError_entry(){ return _throw_IncompatibleClassChangeError_entry; }
203 static address throw_ArithmeticException_entry() { return _throw_ArithmeticException_entry; }
204 static address throw_NullPointerException_entry() { return _throw_NullPointerException_entry; }
205 static address throw_NullPointerException_at_call_entry(){ return _throw_NullPointerException_at_call_entry; }
206 static address throw_StackOverflowError_entry() { return _throw_StackOverflowError_entry; }
207
208 // Exceptions during unsafe access - should throw Java exception rather
209 // than crash.
210 static address handler_for_unsafe_access() { return _handler_for_unsafe_access_entry; }
211
212 static address atomic_xchg_entry() { return _atomic_xchg_entry; }
213 static address atomic_xchg_ptr_entry() { return _atomic_xchg_ptr_entry; }
214 static address atomic_store_entry() { return _atomic_store_entry; }
215 static address atomic_store_ptr_entry() { return _atomic_store_ptr_entry; }
216 static address atomic_cmpxchg_entry() { return _atomic_cmpxchg_entry; }
217 static address atomic_cmpxchg_ptr_entry() { return _atomic_cmpxchg_ptr_entry; }
218 static address atomic_cmpxchg_long_entry() { return _atomic_cmpxchg_long_entry; }
219 static address atomic_add_entry() { return _atomic_add_entry; }
220 static address atomic_add_ptr_entry() { return _atomic_add_ptr_entry; }
221 static address fence_entry() { return _fence_entry; }
222
223 static address d2i_wrapper() { return _d2i_wrapper; }
224 static address d2l_wrapper() { return _d2l_wrapper; }
225 static jint fpu_cntrl_wrd_std() { return _fpu_cntrl_wrd_std; }
226 static address addr_fpu_cntrl_wrd_std() { return (address)&_fpu_cntrl_wrd_std; }
227 static address addr_fpu_cntrl_wrd_24() { return (address)&_fpu_cntrl_wrd_24; }
228 static address addr_fpu_cntrl_wrd_64() { return (address)&_fpu_cntrl_wrd_64; }
229 static address addr_fpu_cntrl_wrd_trunc() { return (address)&_fpu_cntrl_wrd_trunc; }
230 static address addr_mxcsr_std() { return (address)&_mxcsr_std; }
231 static address addr_fpu_subnormal_bias1() { return (address)&_fpu_subnormal_bias1; }
232 static address addr_fpu_subnormal_bias2() { return (address)&_fpu_subnormal_bias2; }
233
234
235 static address jbyte_arraycopy() { return _jbyte_arraycopy; }
236 static address jshort_arraycopy() { return _jshort_arraycopy; }
237 static address jint_arraycopy() { return _jint_arraycopy; }
238 static address jlong_arraycopy() { return _jlong_arraycopy; }
239 static address oop_arraycopy() { return _oop_arraycopy; }
240 static address jbyte_disjoint_arraycopy() { return _jbyte_disjoint_arraycopy; }
241 static address jshort_disjoint_arraycopy() { return _jshort_disjoint_arraycopy; }
242 static address jint_disjoint_arraycopy() { return _jint_disjoint_arraycopy; }
243 static address jlong_disjoint_arraycopy() { return _jlong_disjoint_arraycopy; }
244 static address oop_disjoint_arraycopy() { return _oop_disjoint_arraycopy; }
245
246 static address arrayof_jbyte_arraycopy() { return _arrayof_jbyte_arraycopy; }
247 static address arrayof_jshort_arraycopy() { return _arrayof_jshort_arraycopy; }
248 static address arrayof_jint_arraycopy() { return _arrayof_jint_arraycopy; }
249 static address arrayof_jlong_arraycopy() { return _arrayof_jlong_arraycopy; }
250 static address arrayof_oop_arraycopy() { return _arrayof_oop_arraycopy; }
251
252 static address arrayof_jbyte_disjoint_arraycopy() { return _arrayof_jbyte_disjoint_arraycopy; }
253 static address arrayof_jshort_disjoint_arraycopy() { return _arrayof_jshort_disjoint_arraycopy; }
254 static address arrayof_jint_disjoint_arraycopy() { return _arrayof_jint_disjoint_arraycopy; }
255 static address arrayof_jlong_disjoint_arraycopy() { return _arrayof_jlong_disjoint_arraycopy; }
256 static address arrayof_oop_disjoint_arraycopy() { return _arrayof_oop_disjoint_arraycopy; }
257
258 static address checkcast_arraycopy() { return _checkcast_arraycopy; }
259 static address unsafe_arraycopy() { return _unsafe_arraycopy; }
260 static address generic_arraycopy() { return _generic_arraycopy; }
261
262 static double intrinsic_log(double d) {
263 assert(_intrinsic_log != NULL, "must be defined");
264 return _intrinsic_log(d);
265 }
266 static double intrinsic_log10(double d) {
267 assert(_intrinsic_log != NULL, "must be defined");
268 return _intrinsic_log10(d);
269 }
270 static double intrinsic_exp(double d) {
271 assert(_intrinsic_exp != NULL, "must be defined");
272 return _intrinsic_exp(d);
273 }
274 static double intrinsic_pow(double d, double d2) {
275 assert(_intrinsic_pow != NULL, "must be defined");
276 return _intrinsic_pow(d, d2);
277 }
278 static double intrinsic_sin(double d) {
279 assert(_intrinsic_sin != NULL, "must be defined");
280 return _intrinsic_sin(d);
281 }
282 static double intrinsic_cos(double d) {
283 assert(_intrinsic_cos != NULL, "must be defined");
284 return _intrinsic_cos(d);
285 }
286 static double intrinsic_tan(double d) {
287 assert(_intrinsic_tan != NULL, "must be defined");
288 return _intrinsic_tan(d);
289 }
290
291 //
292 // Default versions of the above arraycopy functions for platforms which do
293 // not have specialized versions
294 //
295 static void jbyte_copy (jbyte* src, jbyte* dest, size_t count);
296 static void jshort_copy(jshort* src, jshort* dest, size_t count);
297 static void jint_copy (jint* src, jint* dest, size_t count);
298 static void jlong_copy (jlong* src, jlong* dest, size_t count);
299 static void oop_copy (oop* src, oop* dest, size_t count);
300
301 static void arrayof_jbyte_copy (HeapWord* src, HeapWord* dest, size_t count);
302 static void arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count);
303 static void arrayof_jint_copy (HeapWord* src, HeapWord* dest, size_t count);
304 static void arrayof_jlong_copy (HeapWord* src, HeapWord* dest, size_t count);
305 static void arrayof_oop_copy (HeapWord* src, HeapWord* dest, size_t count);
306 };