1 /*
2 * Copyright (c) 1997, 2015, 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 */
24
25 #ifndef SHARE_VM_RUNTIME_STUBROUTINES_HPP
26 #define SHARE_VM_RUNTIME_STUBROUTINES_HPP
27
28 #include "code/codeBlob.hpp"
29 #include "memory/allocation.hpp"
30 #include "runtime/frame.hpp"
31 #include "runtime/mutexLocker.hpp"
32 #include "runtime/stubCodeGenerator.hpp"
33 #include "utilities/top.hpp"
34 #ifdef TARGET_ARCH_x86
35 # include "nativeInst_x86.hpp"
36 #endif
37 #ifdef TARGET_ARCH_aarch64
38 # include "nativeInst_aarch64.hpp"
39 #endif
40 #ifdef TARGET_ARCH_sparc
41 # include "nativeInst_sparc.hpp"
42 #endif
43 #ifdef TARGET_ARCH_zero
44 # include "nativeInst_zero.hpp"
45 #endif
46 #ifdef TARGET_ARCH_arm
47 # include "nativeInst_arm.hpp"
48 #endif
49 #ifdef TARGET_ARCH_ppc
50 # include "nativeInst_ppc.hpp"
51 #endif
52
53 // StubRoutines provides entry points to assembly routines used by
54 // compiled code and the run-time system. Platform-specific entry
55 // points are defined in the platform-specific inner class.
56 //
57 // Class scheme:
58 //
59 // platform-independent platform-dependent
60 //
61 // stubRoutines.hpp <-- included -- stubRoutines_<arch>.hpp
62 // ^ ^
63 // | |
64 // implements implements
65 // | |
66 // | |
67 // stubRoutines.cpp stubRoutines_<arch>.cpp
68 // stubRoutines_<os_family>.cpp stubGenerator_<arch>.cpp
69 // stubRoutines_<os_arch>.cpp
70 //
71 // Note 1: The important thing is a clean decoupling between stub
72 // entry points (interfacing to the whole vm; i.e., 1-to-n
73 // relationship) and stub generators (interfacing only to
74 // the entry points implementation; i.e., 1-to-1 relationship).
75 // This significantly simplifies changes in the generator
76 // structure since the rest of the vm is not affected.
77 //
78 // Note 2: stubGenerator_<arch>.cpp contains a minimal portion of
79 // machine-independent code; namely the generator calls of
80 // the generator functions that are used platform-independently.
81 // However, it comes with the advantage of having a 1-file
82 // implementation of the generator. It should be fairly easy
83 // to change, should it become a problem later.
84 //
85 // Scheme for adding a new entry point:
86 //
87 // 1. determine if it's a platform-dependent or independent entry point
88 // a) if platform independent: make subsequent changes in the independent files
89 // b) if platform dependent: make subsequent changes in the dependent files
90 // 2. add a private instance variable holding the entry point address
91 // 3. add a public accessor function to the instance variable
92 // 4. implement the corresponding generator function in the platform-dependent
93 // stubGenerator_<arch>.cpp file and call the function in generate_all() of that file
94
95
96 class StubRoutines: AllStatic {
97
98 public:
99 enum platform_independent_constants {
100 max_size_of_parameters = 256 // max. parameter size supported by megamorphic lookups
101 };
102
103 // Dependencies
104 friend class StubGenerator;
105 #if defined STUBROUTINES_MD_HPP
106 # include STUBROUTINES_MD_HPP
107 #elif defined TARGET_ARCH_MODEL_x86_32
108 # include "stubRoutines_x86_32.hpp"
109 #elif defined TARGET_ARCH_MODEL_x86_64
110 # include "stubRoutines_x86_64.hpp"
111 #elif defined TARGET_ARCH_MODEL_aarch64
112 # include "stubRoutines_aarch64.hpp"
113 #elif defined TARGET_ARCH_MODEL_sparc
114 # include "stubRoutines_sparc.hpp"
115 #elif defined TARGET_ARCH_MODEL_zero
116 # include "stubRoutines_zero.hpp"
117 #elif defined TARGET_ARCH_MODEL_ppc_64
118 # include "stubRoutines_ppc_64.hpp"
119 #endif
120
121 static jint _verify_oop_count;
122 static address _verify_oop_subroutine_entry;
123
124 static address _call_stub_return_address; // the return PC, when returning to a call stub
125 static address _call_stub_entry;
126 static address _forward_exception_entry;
127 static address _catch_exception_entry;
128 static address _throw_AbstractMethodError_entry;
129 static address _throw_IncompatibleClassChangeError_entry;
130 static address _throw_NullPointerException_at_call_entry;
131 static address _throw_StackOverflowError_entry;
132 static address _handler_for_unsafe_access_entry;
133
134 static address _atomic_xchg_entry;
135 static address _atomic_xchg_ptr_entry;
136 static address _atomic_store_entry;
137 static address _atomic_store_ptr_entry;
138 static address _atomic_cmpxchg_entry;
139 static address _atomic_cmpxchg_ptr_entry;
140 static address _atomic_cmpxchg_long_entry;
141 static address _atomic_add_entry;
142 static address _atomic_add_ptr_entry;
143 static address _fence_entry;
144 static address _d2i_wrapper;
145 static address _d2l_wrapper;
146
147 static jint _fpu_cntrl_wrd_std;
148 static jint _fpu_cntrl_wrd_24;
149 static jint _fpu_cntrl_wrd_64;
150 static jint _fpu_cntrl_wrd_trunc;
151 static jint _mxcsr_std;
152 static jint _fpu_subnormal_bias1[3];
153 static jint _fpu_subnormal_bias2[3];
154
155 static BufferBlob* _code1; // code buffer for initial routines
156 static BufferBlob* _code2; // code buffer for all other routines
157
158 // Leaf routines which implement arraycopy and their addresses
159 // arraycopy operands aligned on element type boundary
160 static address _jbyte_arraycopy;
161 static address _jshort_arraycopy;
162 static address _jint_arraycopy;
163 static address _jlong_arraycopy;
164 static address _oop_arraycopy, _oop_arraycopy_uninit;
165 static address _jbyte_disjoint_arraycopy;
166 static address _jshort_disjoint_arraycopy;
167 static address _jint_disjoint_arraycopy;
168 static address _jlong_disjoint_arraycopy;
169 static address _oop_disjoint_arraycopy, _oop_disjoint_arraycopy_uninit;
170
171 // arraycopy operands aligned on zero'th element boundary
172 // These are identical to the ones aligned aligned on an
173 // element type boundary, except that they assume that both
174 // source and destination are HeapWord aligned.
175 static address _arrayof_jbyte_arraycopy;
176 static address _arrayof_jshort_arraycopy;
177 static address _arrayof_jint_arraycopy;
178 static address _arrayof_jlong_arraycopy;
179 static address _arrayof_oop_arraycopy, _arrayof_oop_arraycopy_uninit;
180 static address _arrayof_jbyte_disjoint_arraycopy;
181 static address _arrayof_jshort_disjoint_arraycopy;
182 static address _arrayof_jint_disjoint_arraycopy;
183 static address _arrayof_jlong_disjoint_arraycopy;
184 static address _arrayof_oop_disjoint_arraycopy, _arrayof_oop_disjoint_arraycopy_uninit;
185
186 // these are recommended but optional:
187 static address _checkcast_arraycopy, _checkcast_arraycopy_uninit;
188 static address _unsafe_arraycopy;
189 static address _generic_arraycopy;
190
191 static address _jbyte_fill;
192 static address _jshort_fill;
193 static address _jint_fill;
194 static address _arrayof_jbyte_fill;
195 static address _arrayof_jshort_fill;
196 static address _arrayof_jint_fill;
197
198 // zero heap space aligned to jlong (8 bytes)
199 static address _zero_aligned_words;
200
201 static address _aescrypt_encryptBlock;
202 static address _aescrypt_decryptBlock;
203 static address _cipherBlockChaining_encryptAESCrypt;
204 static address _cipherBlockChaining_decryptAESCrypt;
205 static address _ghash_processBlocks;
206
207 static address _sha1_implCompress;
208 static address _sha1_implCompressMB;
209 static address _sha256_implCompress;
210 static address _sha256_implCompressMB;
211 static address _sha512_implCompress;
212 static address _sha512_implCompressMB;
213
214 static address _updateBytesCRC32;
215 static address _crc_table_adr;
216
217 static address _multiplyToLen;
218 static address _squareToLen;
219 static address _mulAdd;
220 static address _montgomeryMultiply;
221 static address _montgomerySquare;
222
223 // These are versions of the java.lang.Math methods which perform
224 // the same operations as the intrinsic version. They are used for
225 // constant folding in the compiler to ensure equivalence. If the
226 // intrinsic version returns the same result as the strict version
227 // then they can be set to the appropriate function from
228 // SharedRuntime.
229 static double (*_intrinsic_log)(double);
230 static double (*_intrinsic_log10)(double);
231 static double (*_intrinsic_exp)(double);
232 static double (*_intrinsic_pow)(double, double);
233 static double (*_intrinsic_sin)(double);
234 static double (*_intrinsic_cos)(double);
235 static double (*_intrinsic_tan)(double);
236
237 // Safefetch stubs.
238 static address _safefetch32_entry;
239 static address _safefetch32_fault_pc;
240 static address _safefetch32_continuation_pc;
241 static address _safefetchN_entry;
242 static address _safefetchN_fault_pc;
243 static address _safefetchN_continuation_pc;
244
245 public:
246 // Initialization/Testing
247 static void initialize1(); // must happen before universe::genesis
248 static void initialize2(); // must happen after universe::genesis
249
250 static bool is_stub_code(address addr) { return contains(addr); }
251
252 static bool contains(address addr) {
253 return
254 (_code1 != NULL && _code1->blob_contains(addr)) ||
255 (_code2 != NULL && _code2->blob_contains(addr)) ;
256 }
257
258 static CodeBlob* code1() { return _code1; }
259 static CodeBlob* code2() { return _code2; }
260
261 // Debugging
262 static jint verify_oop_count() { return _verify_oop_count; }
263 static jint* verify_oop_count_addr() { return &_verify_oop_count; }
264 // a subroutine for debugging the GC
265 static address verify_oop_subroutine_entry_address() { return (address)&_verify_oop_subroutine_entry; }
266
267 static address catch_exception_entry() { return _catch_exception_entry; }
268
269 // Calls to Java
270 typedef void (*CallStub)(
271 address link,
272 intptr_t* result,
273 BasicType result_type,
274 Method* method,
275 address entry_point,
276 intptr_t* parameters,
277 int size_of_parameters,
278 TRAPS
279 );
280
281 static CallStub call_stub() { return CAST_TO_FN_PTR(CallStub, _call_stub_entry); }
282
283 // Exceptions
284 static address forward_exception_entry() { return _forward_exception_entry; }
285 // Implicit exceptions
286 static address throw_AbstractMethodError_entry() { return _throw_AbstractMethodError_entry; }
287 static address throw_IncompatibleClassChangeError_entry(){ return _throw_IncompatibleClassChangeError_entry; }
288 static address throw_NullPointerException_at_call_entry(){ return _throw_NullPointerException_at_call_entry; }
289 static address throw_StackOverflowError_entry() { return _throw_StackOverflowError_entry; }
290
291 // Exceptions during unsafe access - should throw Java exception rather
292 // than crash.
293 static address handler_for_unsafe_access() { return _handler_for_unsafe_access_entry; }
294
295 static address atomic_xchg_entry() { return _atomic_xchg_entry; }
296 static address atomic_xchg_ptr_entry() { return _atomic_xchg_ptr_entry; }
297 static address atomic_store_entry() { return _atomic_store_entry; }
298 static address atomic_store_ptr_entry() { return _atomic_store_ptr_entry; }
299 static address atomic_cmpxchg_entry() { return _atomic_cmpxchg_entry; }
300 static address atomic_cmpxchg_ptr_entry() { return _atomic_cmpxchg_ptr_entry; }
301 static address atomic_cmpxchg_long_entry() { return _atomic_cmpxchg_long_entry; }
302 static address atomic_add_entry() { return _atomic_add_entry; }
303 static address atomic_add_ptr_entry() { return _atomic_add_ptr_entry; }
304 static address fence_entry() { return _fence_entry; }
305
306 static address d2i_wrapper() { return _d2i_wrapper; }
307 static address d2l_wrapper() { return _d2l_wrapper; }
308 static jint fpu_cntrl_wrd_std() { return _fpu_cntrl_wrd_std; }
309 static address addr_fpu_cntrl_wrd_std() { return (address)&_fpu_cntrl_wrd_std; }
310 static address addr_fpu_cntrl_wrd_24() { return (address)&_fpu_cntrl_wrd_24; }
311 static address addr_fpu_cntrl_wrd_64() { return (address)&_fpu_cntrl_wrd_64; }
312 static address addr_fpu_cntrl_wrd_trunc() { return (address)&_fpu_cntrl_wrd_trunc; }
313 static address addr_mxcsr_std() { return (address)&_mxcsr_std; }
314 static address addr_fpu_subnormal_bias1() { return (address)&_fpu_subnormal_bias1; }
315 static address addr_fpu_subnormal_bias2() { return (address)&_fpu_subnormal_bias2; }
316
317
318 static address select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized);
319
320 static address jbyte_arraycopy() { return _jbyte_arraycopy; }
321 static address jshort_arraycopy() { return _jshort_arraycopy; }
322 static address jint_arraycopy() { return _jint_arraycopy; }
323 static address jlong_arraycopy() { return _jlong_arraycopy; }
324 static address oop_arraycopy(bool dest_uninitialized = false) {
325 return dest_uninitialized ? _oop_arraycopy_uninit : _oop_arraycopy;
326 }
327 static address jbyte_disjoint_arraycopy() { return _jbyte_disjoint_arraycopy; }
328 static address jshort_disjoint_arraycopy() { return _jshort_disjoint_arraycopy; }
329 static address jint_disjoint_arraycopy() { return _jint_disjoint_arraycopy; }
330 static address jlong_disjoint_arraycopy() { return _jlong_disjoint_arraycopy; }
331 static address oop_disjoint_arraycopy(bool dest_uninitialized = false) {
332 return dest_uninitialized ? _oop_disjoint_arraycopy_uninit : _oop_disjoint_arraycopy;
333 }
334
335 static address arrayof_jbyte_arraycopy() { return _arrayof_jbyte_arraycopy; }
336 static address arrayof_jshort_arraycopy() { return _arrayof_jshort_arraycopy; }
337 static address arrayof_jint_arraycopy() { return _arrayof_jint_arraycopy; }
338 static address arrayof_jlong_arraycopy() { return _arrayof_jlong_arraycopy; }
339 static address arrayof_oop_arraycopy(bool dest_uninitialized = false) {
340 return dest_uninitialized ? _arrayof_oop_arraycopy_uninit : _arrayof_oop_arraycopy;
341 }
342
343 static address arrayof_jbyte_disjoint_arraycopy() { return _arrayof_jbyte_disjoint_arraycopy; }
344 static address arrayof_jshort_disjoint_arraycopy() { return _arrayof_jshort_disjoint_arraycopy; }
345 static address arrayof_jint_disjoint_arraycopy() { return _arrayof_jint_disjoint_arraycopy; }
346 static address arrayof_jlong_disjoint_arraycopy() { return _arrayof_jlong_disjoint_arraycopy; }
347 static address arrayof_oop_disjoint_arraycopy(bool dest_uninitialized = false) {
348 return dest_uninitialized ? _arrayof_oop_disjoint_arraycopy_uninit : _arrayof_oop_disjoint_arraycopy;
349 }
350
351 static address checkcast_arraycopy(bool dest_uninitialized = false) {
352 return dest_uninitialized ? _checkcast_arraycopy_uninit : _checkcast_arraycopy;
353 }
354 static address unsafe_arraycopy() { return _unsafe_arraycopy; }
355 static address generic_arraycopy() { return _generic_arraycopy; }
356
357 static address jbyte_fill() { return _jbyte_fill; }
358 static address jshort_fill() { return _jshort_fill; }
359 static address jint_fill() { return _jint_fill; }
360 static address arrayof_jbyte_fill() { return _arrayof_jbyte_fill; }
361 static address arrayof_jshort_fill() { return _arrayof_jshort_fill; }
362 static address arrayof_jint_fill() { return _arrayof_jint_fill; }
363
364 static address aescrypt_encryptBlock() { return _aescrypt_encryptBlock; }
365 static address aescrypt_decryptBlock() { return _aescrypt_decryptBlock; }
366 static address cipherBlockChaining_encryptAESCrypt() { return _cipherBlockChaining_encryptAESCrypt; }
367 static address cipherBlockChaining_decryptAESCrypt() { return _cipherBlockChaining_decryptAESCrypt; }
368 static address ghash_processBlocks() { return _ghash_processBlocks; }
369
370 static address sha1_implCompress() { return _sha1_implCompress; }
371 static address sha1_implCompressMB() { return _sha1_implCompressMB; }
372 static address sha256_implCompress() { return _sha256_implCompress; }
373 static address sha256_implCompressMB() { return _sha256_implCompressMB; }
374 static address sha512_implCompress() { return _sha512_implCompress; }
375 static address sha512_implCompressMB() { return _sha512_implCompressMB; }
376
377 static address updateBytesCRC32() { return _updateBytesCRC32; }
378 static address crc_table_addr() { return _crc_table_adr; }
379
380 static address multiplyToLen() {return _multiplyToLen; }
381 static address squareToLen() {return _squareToLen; }
382 static address mulAdd() {return _mulAdd; }
383 static address montgomeryMultiply() { return _montgomeryMultiply; }
384 static address montgomerySquare() { return _montgomerySquare; }
385
386 static address select_fill_function(BasicType t, bool aligned, const char* &name);
387
388 static address zero_aligned_words() { return _zero_aligned_words; }
389
390 static double intrinsic_log(double d) {
391 assert(_intrinsic_log != NULL, "must be defined");
392 return _intrinsic_log(d);
393 }
394 static double intrinsic_log10(double d) {
395 assert(_intrinsic_log != NULL, "must be defined");
396 return _intrinsic_log10(d);
397 }
398 static double intrinsic_exp(double d) {
399 assert(_intrinsic_exp != NULL, "must be defined");
400 return _intrinsic_exp(d);
401 }
402 static double intrinsic_pow(double d, double d2) {
403 assert(_intrinsic_pow != NULL, "must be defined");
404 return _intrinsic_pow(d, d2);
405 }
406 static double intrinsic_sin(double d) {
407 assert(_intrinsic_sin != NULL, "must be defined");
408 return _intrinsic_sin(d);
409 }
410 static double intrinsic_cos(double d) {
411 assert(_intrinsic_cos != NULL, "must be defined");
412 return _intrinsic_cos(d);
413 }
414 static double intrinsic_tan(double d) {
415 assert(_intrinsic_tan != NULL, "must be defined");
416 return _intrinsic_tan(d);
417 }
418
419 //
420 // Safefetch stub support
421 //
422
423 typedef int (*SafeFetch32Stub)(int* adr, int errValue);
424 typedef intptr_t (*SafeFetchNStub) (intptr_t* adr, intptr_t errValue);
425
426 static SafeFetch32Stub SafeFetch32_stub() { return CAST_TO_FN_PTR(SafeFetch32Stub, _safefetch32_entry); }
427 static SafeFetchNStub SafeFetchN_stub() { return CAST_TO_FN_PTR(SafeFetchNStub, _safefetchN_entry); }
428
429 static bool is_safefetch_fault(address pc) {
430 return pc != NULL &&
431 (pc == _safefetch32_fault_pc ||
432 pc == _safefetchN_fault_pc);
433 }
434
435 static address continuation_for_safefetch_fault(address pc) {
436 assert(_safefetch32_continuation_pc != NULL &&
437 _safefetchN_continuation_pc != NULL,
438 "not initialized");
439
440 if (pc == _safefetch32_fault_pc) return _safefetch32_continuation_pc;
441 if (pc == _safefetchN_fault_pc) return _safefetchN_continuation_pc;
442
443 ShouldNotReachHere();
444 return NULL;
445 }
446
447 //
448 // Default versions of the above arraycopy functions for platforms which do
449 // not have specialized versions
450 //
451 static void jbyte_copy (jbyte* src, jbyte* dest, size_t count);
452 static void jshort_copy (jshort* src, jshort* dest, size_t count);
453 static void jint_copy (jint* src, jint* dest, size_t count);
454 static void jlong_copy (jlong* src, jlong* dest, size_t count);
455 static void oop_copy (oop* src, oop* dest, size_t count);
456 static void oop_copy_uninit(oop* src, oop* dest, size_t count);
457
458 static void arrayof_jbyte_copy (HeapWord* src, HeapWord* dest, size_t count);
459 static void arrayof_jshort_copy (HeapWord* src, HeapWord* dest, size_t count);
460 static void arrayof_jint_copy (HeapWord* src, HeapWord* dest, size_t count);
461 static void arrayof_jlong_copy (HeapWord* src, HeapWord* dest, size_t count);
462 static void arrayof_oop_copy (HeapWord* src, HeapWord* dest, size_t count);
463 static void arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count);
464 };
465
466 // Safefetch allows to load a value from a location that's not known
467 // to be valid. If the load causes a fault, the error value is returned.
468 inline int SafeFetch32(int* adr, int errValue) {
469 assert(StubRoutines::SafeFetch32_stub(), "stub not yet generated");
470 return StubRoutines::SafeFetch32_stub()(adr, errValue);
471 }
472 inline intptr_t SafeFetchN(intptr_t* adr, intptr_t errValue) {
473 assert(StubRoutines::SafeFetchN_stub(), "stub not yet generated");
474 return StubRoutines::SafeFetchN_stub()(adr, errValue);
475 }
476
477 #endif // SHARE_VM_RUNTIME_STUBROUTINES_HPP