Mercurial > hg > truffle
annotate src/share/vm/runtime/stubRoutines.cpp @ 14714:b602356a9cfc
additional canonicalizers for accesses and value nodes (improves number of implicit null checks)
author | Lukas Stadler <lukas.stadler@oracle.com> |
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date | Thu, 20 Mar 2014 17:15:36 +0100 |
parents | 6b0fd0964b87 |
children | 4062efea018b |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "asm/codeBuffer.hpp" | |
27 #include "memory/resourceArea.hpp" | |
28 #include "oops/oop.inline.hpp" | |
29 #include "runtime/interfaceSupport.hpp" | |
30 #include "runtime/sharedRuntime.hpp" | |
31 #include "runtime/stubRoutines.hpp" | |
32 #include "runtime/timer.hpp" | |
33 #include "utilities/copy.hpp" | |
34 #ifdef COMPILER2 | |
35 #include "opto/runtime.hpp" | |
36 #endif | |
0 | 37 |
38 | |
39 // Implementation of StubRoutines - for a description | |
40 // of how to extend it, see the header file. | |
41 | |
42 // Class Variables | |
43 | |
44 BufferBlob* StubRoutines::_code1 = NULL; | |
45 BufferBlob* StubRoutines::_code2 = NULL; | |
46 | |
47 address StubRoutines::_call_stub_return_address = NULL; | |
48 address StubRoutines::_call_stub_entry = NULL; | |
49 | |
50 address StubRoutines::_catch_exception_entry = NULL; | |
51 address StubRoutines::_forward_exception_entry = NULL; | |
52 address StubRoutines::_throw_AbstractMethodError_entry = NULL; | |
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53 address StubRoutines::_throw_IncompatibleClassChangeError_entry = NULL; |
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54 address StubRoutines::_throw_InvalidInstalledCodeException_entry = NULL; |
0 | 55 address StubRoutines::_throw_NullPointerException_at_call_entry = NULL; |
56 address StubRoutines::_throw_StackOverflowError_entry = NULL; | |
57 address StubRoutines::_handler_for_unsafe_access_entry = NULL; | |
58 jint StubRoutines::_verify_oop_count = 0; | |
59 address StubRoutines::_verify_oop_subroutine_entry = NULL; | |
60 address StubRoutines::_atomic_xchg_entry = NULL; | |
61 address StubRoutines::_atomic_xchg_ptr_entry = NULL; | |
62 address StubRoutines::_atomic_store_entry = NULL; | |
63 address StubRoutines::_atomic_store_ptr_entry = NULL; | |
64 address StubRoutines::_atomic_cmpxchg_entry = NULL; | |
65 address StubRoutines::_atomic_cmpxchg_ptr_entry = NULL; | |
66 address StubRoutines::_atomic_cmpxchg_long_entry = NULL; | |
67 address StubRoutines::_atomic_add_entry = NULL; | |
68 address StubRoutines::_atomic_add_ptr_entry = NULL; | |
69 address StubRoutines::_fence_entry = NULL; | |
70 address StubRoutines::_d2i_wrapper = NULL; | |
71 address StubRoutines::_d2l_wrapper = NULL; | |
72 | |
73 jint StubRoutines::_fpu_cntrl_wrd_std = 0; | |
74 jint StubRoutines::_fpu_cntrl_wrd_24 = 0; | |
75 jint StubRoutines::_fpu_cntrl_wrd_64 = 0; | |
76 jint StubRoutines::_fpu_cntrl_wrd_trunc = 0; | |
77 jint StubRoutines::_mxcsr_std = 0; | |
78 jint StubRoutines::_fpu_subnormal_bias1[3] = { 0, 0, 0 }; | |
79 jint StubRoutines::_fpu_subnormal_bias2[3] = { 0, 0, 0 }; | |
80 | |
81 // Compiled code entry points default values | |
2324 | 82 // The default functions don't have separate disjoint versions. |
0 | 83 address StubRoutines::_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy); |
84 address StubRoutines::_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy); | |
85 address StubRoutines::_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy); | |
86 address StubRoutines::_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy); | |
87 address StubRoutines::_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy); | |
2324 | 88 address StubRoutines::_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit); |
0 | 89 address StubRoutines::_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy); |
90 address StubRoutines::_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy); | |
91 address StubRoutines::_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy); | |
92 address StubRoutines::_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy); | |
93 address StubRoutines::_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy); | |
2324 | 94 address StubRoutines::_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit); |
0 | 95 |
96 address StubRoutines::_arrayof_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy); | |
97 address StubRoutines::_arrayof_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy); | |
98 address StubRoutines::_arrayof_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy); | |
99 address StubRoutines::_arrayof_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy); | |
100 address StubRoutines::_arrayof_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy); | |
2324 | 101 address StubRoutines::_arrayof_oop_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit); |
0 | 102 address StubRoutines::_arrayof_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy); |
103 address StubRoutines::_arrayof_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy); | |
104 address StubRoutines::_arrayof_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy); | |
105 address StubRoutines::_arrayof_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy); | |
2324 | 106 address StubRoutines::_arrayof_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy); |
107 address StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit); | |
108 | |
3892 | 109 address StubRoutines::_zero_aligned_words = CAST_FROM_FN_PTR(address, Copy::zero_to_words); |
0 | 110 |
111 address StubRoutines::_checkcast_arraycopy = NULL; | |
2324 | 112 address StubRoutines::_checkcast_arraycopy_uninit = NULL; |
0 | 113 address StubRoutines::_unsafe_arraycopy = NULL; |
114 address StubRoutines::_generic_arraycopy = NULL; | |
115 | |
1763 | 116 |
117 address StubRoutines::_jbyte_fill; | |
118 address StubRoutines::_jshort_fill; | |
119 address StubRoutines::_jint_fill; | |
120 address StubRoutines::_arrayof_jbyte_fill; | |
121 address StubRoutines::_arrayof_jshort_fill; | |
122 address StubRoutines::_arrayof_jint_fill; | |
123 | |
6894 | 124 address StubRoutines::_aescrypt_encryptBlock = NULL; |
125 address StubRoutines::_aescrypt_decryptBlock = NULL; | |
126 address StubRoutines::_cipherBlockChaining_encryptAESCrypt = NULL; | |
127 address StubRoutines::_cipherBlockChaining_decryptAESCrypt = NULL; | |
1763 | 128 |
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129 address StubRoutines::_updateBytesCRC32 = NULL; |
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130 address StubRoutines::_crc_table_adr = NULL; |
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131 |
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132 double (* StubRoutines::_intrinsic_log )(double) = NULL; |
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133 double (* StubRoutines::_intrinsic_log10 )(double) = NULL; |
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134 double (* StubRoutines::_intrinsic_exp )(double) = NULL; |
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135 double (* StubRoutines::_intrinsic_pow )(double, double) = NULL; |
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136 double (* StubRoutines::_intrinsic_sin )(double) = NULL; |
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137 double (* StubRoutines::_intrinsic_cos )(double) = NULL; |
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138 double (* StubRoutines::_intrinsic_tan )(double) = NULL; |
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139 |
11127 | 140 address StubRoutines::_safefetch32_entry = NULL; |
141 address StubRoutines::_safefetch32_fault_pc = NULL; | |
142 address StubRoutines::_safefetch32_continuation_pc = NULL; | |
143 address StubRoutines::_safefetchN_entry = NULL; | |
144 address StubRoutines::_safefetchN_fault_pc = NULL; | |
145 address StubRoutines::_safefetchN_continuation_pc = NULL; | |
146 | |
0 | 147 // Initialization |
148 // | |
149 // Note: to break cycle with universe initialization, stubs are generated in two phases. | |
150 // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry). | |
151 // The second phase includes all other stubs (which may depend on universe being initialized.) | |
152 | |
153 extern void StubGenerator_generate(CodeBuffer* code, bool all); // only interface to generators | |
154 | |
155 void StubRoutines::initialize1() { | |
156 if (_code1 == NULL) { | |
157 ResourceMark rm; | |
158 TraceTime timer("StubRoutines generation 1", TraceStartupTime); | |
159 _code1 = BufferBlob::create("StubRoutines (1)", code_size1); | |
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160 if (_code1 == NULL) { |
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161 vm_exit_out_of_memory(code_size1, OOM_MALLOC_ERROR, "CodeCache: no room for StubRoutines (1)"); |
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162 } |
1748 | 163 CodeBuffer buffer(_code1); |
0 | 164 StubGenerator_generate(&buffer, false); |
165 } | |
166 } | |
167 | |
168 | |
169 #ifdef ASSERT | |
170 typedef void (*arraycopy_fn)(address src, address dst, int count); | |
171 | |
172 // simple tests of generated arraycopy functions | |
173 static void test_arraycopy_func(address func, int alignment) { | |
174 int v = 0xcc; | |
175 int v2 = 0x11; | |
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176 jlong lbuffer[8]; |
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177 jlong lbuffer2[8]; |
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178 address fbuffer = (address) lbuffer; |
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179 address fbuffer2 = (address) lbuffer2; |
0 | 180 unsigned int i; |
181 for (i = 0; i < sizeof(lbuffer); i++) { | |
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182 fbuffer[i] = v; fbuffer2[i] = v2; |
0 | 183 } |
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184 // C++ does not guarantee jlong[] array alignment to 8 bytes. |
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185 // Use middle of array to check that memory before it is not modified. |
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186 address buffer = (address) round_to((intptr_t)&lbuffer[4], BytesPerLong); |
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187 address buffer2 = (address) round_to((intptr_t)&lbuffer2[4], BytesPerLong); |
0 | 188 // do an aligned copy |
189 ((arraycopy_fn)func)(buffer, buffer2, 0); | |
190 for (i = 0; i < sizeof(lbuffer); i++) { | |
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191 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything"); |
0 | 192 } |
193 // adjust destination alignment | |
194 ((arraycopy_fn)func)(buffer, buffer2 + alignment, 0); | |
195 for (i = 0; i < sizeof(lbuffer); i++) { | |
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196 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything"); |
0 | 197 } |
198 // adjust source alignment | |
199 ((arraycopy_fn)func)(buffer + alignment, buffer2, 0); | |
200 for (i = 0; i < sizeof(lbuffer); i++) { | |
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201 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything"); |
0 | 202 } |
203 } | |
204 #endif | |
205 | |
206 | |
207 void StubRoutines::initialize2() { | |
208 if (_code2 == NULL) { | |
209 ResourceMark rm; | |
210 TraceTime timer("StubRoutines generation 2", TraceStartupTime); | |
211 _code2 = BufferBlob::create("StubRoutines (2)", code_size2); | |
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212 if (_code2 == NULL) { |
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213 vm_exit_out_of_memory(code_size2, OOM_MALLOC_ERROR, "CodeCache: no room for StubRoutines (2)"); |
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214 } |
1748 | 215 CodeBuffer buffer(_code2); |
0 | 216 StubGenerator_generate(&buffer, true); |
217 } | |
218 | |
219 #ifdef ASSERT | |
220 | |
221 #define TEST_ARRAYCOPY(type) \ | |
222 test_arraycopy_func( type##_arraycopy(), sizeof(type)); \ | |
223 test_arraycopy_func( type##_disjoint_arraycopy(), sizeof(type)); \ | |
224 test_arraycopy_func(arrayof_##type##_arraycopy(), sizeof(HeapWord)); \ | |
225 test_arraycopy_func(arrayof_##type##_disjoint_arraycopy(), sizeof(HeapWord)) | |
226 | |
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227 // Make sure all the arraycopy stubs properly handle zero count |
0 | 228 TEST_ARRAYCOPY(jbyte); |
229 TEST_ARRAYCOPY(jshort); | |
230 TEST_ARRAYCOPY(jint); | |
231 TEST_ARRAYCOPY(jlong); | |
232 | |
233 #undef TEST_ARRAYCOPY | |
234 | |
1763 | 235 #define TEST_FILL(type) \ |
236 if (_##type##_fill != NULL) { \ | |
237 union { \ | |
238 double d; \ | |
239 type body[96]; \ | |
240 } s; \ | |
241 \ | |
242 int v = 32; \ | |
243 for (int offset = -2; offset <= 2; offset++) { \ | |
244 for (int i = 0; i < 96; i++) { \ | |
245 s.body[i] = 1; \ | |
246 } \ | |
247 type* start = s.body + 8 + offset; \ | |
248 for (int aligned = 0; aligned < 2; aligned++) { \ | |
249 if (aligned) { \ | |
250 if (((intptr_t)start) % HeapWordSize == 0) { \ | |
251 ((void (*)(type*, int, int))StubRoutines::_arrayof_##type##_fill)(start, v, 80); \ | |
252 } else { \ | |
253 continue; \ | |
254 } \ | |
255 } else { \ | |
256 ((void (*)(type*, int, int))StubRoutines::_##type##_fill)(start, v, 80); \ | |
257 } \ | |
258 for (int i = 0; i < 96; i++) { \ | |
259 if (i < (8 + offset) || i >= (88 + offset)) { \ | |
260 assert(s.body[i] == 1, "what?"); \ | |
261 } else { \ | |
262 assert(s.body[i] == 32, "what?"); \ | |
263 } \ | |
264 } \ | |
265 } \ | |
266 } \ | |
267 } \ | |
268 | |
269 TEST_FILL(jbyte); | |
270 TEST_FILL(jshort); | |
271 TEST_FILL(jint); | |
272 | |
273 #undef TEST_FILL | |
274 | |
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275 #define TEST_COPYRTN(type) \ |
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276 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_##type##s_atomic), sizeof(type)); \ |
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277 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::arrayof_conjoint_##type##s), (int)MAX2(sizeof(HeapWord), sizeof(type))) |
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278 |
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279 // Make sure all the copy runtime routines properly handle zero count |
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280 TEST_COPYRTN(jbyte); |
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281 TEST_COPYRTN(jshort); |
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282 TEST_COPYRTN(jint); |
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283 TEST_COPYRTN(jlong); |
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284 |
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285 #undef TEST_COPYRTN |
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286 |
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287 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_words), sizeof(HeapWord)); |
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288 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words), sizeof(HeapWord)); |
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289 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words_atomic), sizeof(HeapWord)); |
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290 // Aligned to BytesPerLong |
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291 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_conjoint_words), sizeof(jlong)); |
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292 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_disjoint_words), sizeof(jlong)); |
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293 |
0 | 294 #endif |
295 } | |
296 | |
297 | |
298 void stubRoutines_init1() { StubRoutines::initialize1(); } | |
299 void stubRoutines_init2() { StubRoutines::initialize2(); } | |
300 | |
301 // | |
302 // Default versions of arraycopy functions | |
303 // | |
304 | |
2324 | 305 static void gen_arraycopy_barrier_pre(oop* dest, size_t count, bool dest_uninitialized) { |
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306 assert(count != 0, "count should be non-zero"); |
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307 assert(count <= (size_t)max_intx, "count too large"); |
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308 BarrierSet* bs = Universe::heap()->barrier_set(); |
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309 assert(bs->has_write_ref_array_pre_opt(), "Must have pre-barrier opt"); |
2324 | 310 bs->write_ref_array_pre(dest, (int)count, dest_uninitialized); |
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311 } |
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312 |
0 | 313 static void gen_arraycopy_barrier(oop* dest, size_t count) { |
314 assert(count != 0, "count should be non-zero"); | |
315 BarrierSet* bs = Universe::heap()->barrier_set(); | |
316 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt"); | |
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317 bs->write_ref_array((HeapWord*)dest, count); |
0 | 318 } |
319 | |
320 JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count)) | |
321 #ifndef PRODUCT | |
322 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy | |
323 #endif // !PRODUCT | |
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324 Copy::conjoint_jbytes_atomic(src, dest, count); |
0 | 325 JRT_END |
326 | |
327 JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count)) | |
328 #ifndef PRODUCT | |
329 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy | |
330 #endif // !PRODUCT | |
331 Copy::conjoint_jshorts_atomic(src, dest, count); | |
332 JRT_END | |
333 | |
334 JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count)) | |
335 #ifndef PRODUCT | |
336 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy | |
337 #endif // !PRODUCT | |
338 Copy::conjoint_jints_atomic(src, dest, count); | |
339 JRT_END | |
340 | |
341 JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count)) | |
342 #ifndef PRODUCT | |
343 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path long/double array copy | |
344 #endif // !PRODUCT | |
345 Copy::conjoint_jlongs_atomic(src, dest, count); | |
346 JRT_END | |
347 | |
348 JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count)) | |
349 #ifndef PRODUCT | |
350 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy | |
351 #endif // !PRODUCT | |
352 assert(count != 0, "count should be non-zero"); | |
2324 | 353 gen_arraycopy_barrier_pre(dest, count, /*dest_uninitialized*/false); |
354 Copy::conjoint_oops_atomic(src, dest, count); | |
355 gen_arraycopy_barrier(dest, count); | |
356 JRT_END | |
357 | |
358 JRT_LEAF(void, StubRoutines::oop_copy_uninit(oop* src, oop* dest, size_t count)) | |
359 #ifndef PRODUCT | |
360 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy | |
361 #endif // !PRODUCT | |
362 assert(count != 0, "count should be non-zero"); | |
363 gen_arraycopy_barrier_pre(dest, count, /*dest_uninitialized*/true); | |
0 | 364 Copy::conjoint_oops_atomic(src, dest, count); |
365 gen_arraycopy_barrier(dest, count); | |
366 JRT_END | |
367 | |
368 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count)) | |
369 #ifndef PRODUCT | |
370 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy | |
371 #endif // !PRODUCT | |
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372 Copy::arrayof_conjoint_jbytes(src, dest, count); |
0 | 373 JRT_END |
374 | |
375 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count)) | |
376 #ifndef PRODUCT | |
377 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy | |
378 #endif // !PRODUCT | |
379 Copy::arrayof_conjoint_jshorts(src, dest, count); | |
380 JRT_END | |
381 | |
382 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count)) | |
383 #ifndef PRODUCT | |
384 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy | |
385 #endif // !PRODUCT | |
386 Copy::arrayof_conjoint_jints(src, dest, count); | |
387 JRT_END | |
388 | |
389 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count)) | |
390 #ifndef PRODUCT | |
391 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path int/float array copy | |
392 #endif // !PRODUCT | |
393 Copy::arrayof_conjoint_jlongs(src, dest, count); | |
394 JRT_END | |
395 | |
396 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count)) | |
397 #ifndef PRODUCT | |
398 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy | |
399 #endif // !PRODUCT | |
400 assert(count != 0, "count should be non-zero"); | |
2324 | 401 gen_arraycopy_barrier_pre((oop *) dest, count, /*dest_uninitialized*/false); |
0 | 402 Copy::arrayof_conjoint_oops(src, dest, count); |
403 gen_arraycopy_barrier((oop *) dest, count); | |
404 JRT_END | |
1763 | 405 |
2324 | 406 JRT_LEAF(void, StubRoutines::arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count)) |
407 #ifndef PRODUCT | |
408 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy | |
409 #endif // !PRODUCT | |
410 assert(count != 0, "count should be non-zero"); | |
411 gen_arraycopy_barrier_pre((oop *) dest, count, /*dest_uninitialized*/true); | |
412 Copy::arrayof_conjoint_oops(src, dest, count); | |
413 gen_arraycopy_barrier((oop *) dest, count); | |
414 JRT_END | |
1763 | 415 |
416 address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) { | |
417 #define RETURN_STUB(xxx_fill) { \ | |
418 name = #xxx_fill; \ | |
419 return StubRoutines::xxx_fill(); } | |
420 | |
421 switch (t) { | |
422 case T_BYTE: | |
423 case T_BOOLEAN: | |
424 if (!aligned) RETURN_STUB(jbyte_fill); | |
425 RETURN_STUB(arrayof_jbyte_fill); | |
426 case T_CHAR: | |
427 case T_SHORT: | |
428 if (!aligned) RETURN_STUB(jshort_fill); | |
429 RETURN_STUB(arrayof_jshort_fill); | |
430 case T_INT: | |
431 case T_FLOAT: | |
432 if (!aligned) RETURN_STUB(jint_fill); | |
433 RETURN_STUB(arrayof_jint_fill); | |
434 case T_DOUBLE: | |
435 case T_LONG: | |
436 case T_ARRAY: | |
437 case T_OBJECT: | |
438 case T_NARROWOOP: | |
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439 case T_NARROWKLASS: |
1763 | 440 case T_ADDRESS: |
441 // Currently unsupported | |
442 return NULL; | |
443 | |
444 default: | |
445 ShouldNotReachHere(); | |
446 return NULL; | |
447 } | |
448 | |
449 #undef RETURN_STUB | |
450 } | |
2446 | 451 |
452 // constants for computing the copy function | |
453 enum { | |
454 COPYFUNC_UNALIGNED = 0, | |
455 COPYFUNC_ALIGNED = 1, // src, dest aligned to HeapWordSize | |
456 COPYFUNC_CONJOINT = 0, | |
457 COPYFUNC_DISJOINT = 2 // src != dest, or transfer can descend | |
458 }; | |
459 | |
460 // Note: The condition "disjoint" applies also for overlapping copies | |
461 // where an descending copy is permitted (i.e., dest_offset <= src_offset). | |
462 address | |
463 StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) { | |
464 int selector = | |
465 (aligned ? COPYFUNC_ALIGNED : COPYFUNC_UNALIGNED) + | |
466 (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT); | |
467 | |
468 #define RETURN_STUB(xxx_arraycopy) { \ | |
469 name = #xxx_arraycopy; \ | |
470 return StubRoutines::xxx_arraycopy(); } | |
471 | |
472 #define RETURN_STUB_PARM(xxx_arraycopy, parm) { \ | |
473 name = #xxx_arraycopy; \ | |
474 return StubRoutines::xxx_arraycopy(parm); } | |
475 | |
476 switch (t) { | |
477 case T_BYTE: | |
478 case T_BOOLEAN: | |
479 switch (selector) { | |
480 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_arraycopy); | |
481 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_arraycopy); | |
482 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jbyte_disjoint_arraycopy); | |
483 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jbyte_disjoint_arraycopy); | |
484 } | |
485 case T_CHAR: | |
486 case T_SHORT: | |
487 switch (selector) { | |
488 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_arraycopy); | |
489 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_arraycopy); | |
490 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jshort_disjoint_arraycopy); | |
491 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jshort_disjoint_arraycopy); | |
492 } | |
493 case T_INT: | |
494 case T_FLOAT: | |
495 switch (selector) { | |
496 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_arraycopy); | |
497 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_arraycopy); | |
498 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jint_disjoint_arraycopy); | |
499 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jint_disjoint_arraycopy); | |
500 } | |
501 case T_DOUBLE: | |
502 case T_LONG: | |
503 switch (selector) { | |
504 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_arraycopy); | |
505 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_arraycopy); | |
506 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB(jlong_disjoint_arraycopy); | |
507 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB(arrayof_jlong_disjoint_arraycopy); | |
508 } | |
509 case T_ARRAY: | |
510 case T_OBJECT: | |
511 switch (selector) { | |
512 case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized); | |
513 case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized); | |
514 case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED: RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized); | |
515 case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED: RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized); | |
516 } | |
517 default: | |
518 ShouldNotReachHere(); | |
519 return NULL; | |
520 } | |
521 | |
522 #undef RETURN_STUB | |
523 #undef RETURN_STUB_PARM | |
524 } |