Mercurial > hg > truffle
annotate src/share/vm/runtime/stubRoutines.cpp @ 1684:66c5dadb4d61
6973308: Missing zero length check before repne scas in check_klass_subtype_slow_path()
Summary: set Z = 0 (not equal) before repne_scan() to indicate that class was not found when RCX == 0.
Reviewed-by: never, phh
author | kvn |
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date | Fri, 30 Jul 2010 10:21:15 -0700 |
parents | d93949c5bdcc |
children | 3e8fbc61cee8 d6f45b55c972 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2010, 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 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_stubRoutines.cpp.incl" | |
27 | |
28 | |
29 // Implementation of StubRoutines - for a description | |
30 // of how to extend it, see the header file. | |
31 | |
32 // Class Variables | |
33 | |
34 BufferBlob* StubRoutines::_code1 = NULL; | |
35 BufferBlob* StubRoutines::_code2 = NULL; | |
36 | |
37 address StubRoutines::_call_stub_return_address = NULL; | |
38 address StubRoutines::_call_stub_entry = NULL; | |
39 | |
40 address StubRoutines::_catch_exception_entry = NULL; | |
41 address StubRoutines::_forward_exception_entry = NULL; | |
42 address StubRoutines::_throw_AbstractMethodError_entry = NULL; | |
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43 address StubRoutines::_throw_IncompatibleClassChangeError_entry = NULL; |
0 | 44 address StubRoutines::_throw_ArithmeticException_entry = NULL; |
45 address StubRoutines::_throw_NullPointerException_entry = NULL; | |
46 address StubRoutines::_throw_NullPointerException_at_call_entry = NULL; | |
47 address StubRoutines::_throw_StackOverflowError_entry = NULL; | |
48 address StubRoutines::_handler_for_unsafe_access_entry = NULL; | |
49 jint StubRoutines::_verify_oop_count = 0; | |
50 address StubRoutines::_verify_oop_subroutine_entry = NULL; | |
51 address StubRoutines::_atomic_xchg_entry = NULL; | |
52 address StubRoutines::_atomic_xchg_ptr_entry = NULL; | |
53 address StubRoutines::_atomic_store_entry = NULL; | |
54 address StubRoutines::_atomic_store_ptr_entry = NULL; | |
55 address StubRoutines::_atomic_cmpxchg_entry = NULL; | |
56 address StubRoutines::_atomic_cmpxchg_ptr_entry = NULL; | |
57 address StubRoutines::_atomic_cmpxchg_long_entry = NULL; | |
58 address StubRoutines::_atomic_add_entry = NULL; | |
59 address StubRoutines::_atomic_add_ptr_entry = NULL; | |
60 address StubRoutines::_fence_entry = NULL; | |
61 address StubRoutines::_d2i_wrapper = NULL; | |
62 address StubRoutines::_d2l_wrapper = NULL; | |
63 | |
64 jint StubRoutines::_fpu_cntrl_wrd_std = 0; | |
65 jint StubRoutines::_fpu_cntrl_wrd_24 = 0; | |
66 jint StubRoutines::_fpu_cntrl_wrd_64 = 0; | |
67 jint StubRoutines::_fpu_cntrl_wrd_trunc = 0; | |
68 jint StubRoutines::_mxcsr_std = 0; | |
69 jint StubRoutines::_fpu_subnormal_bias1[3] = { 0, 0, 0 }; | |
70 jint StubRoutines::_fpu_subnormal_bias2[3] = { 0, 0, 0 }; | |
71 | |
72 // Compiled code entry points default values | |
73 // The dafault functions don't have separate disjoint versions. | |
74 address StubRoutines::_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy); | |
75 address StubRoutines::_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy); | |
76 address StubRoutines::_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy); | |
77 address StubRoutines::_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy); | |
78 address StubRoutines::_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy); | |
79 address StubRoutines::_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy); | |
80 address StubRoutines::_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy); | |
81 address StubRoutines::_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy); | |
82 address StubRoutines::_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy); | |
83 address StubRoutines::_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy); | |
84 | |
85 address StubRoutines::_arrayof_jbyte_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy); | |
86 address StubRoutines::_arrayof_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy); | |
87 address StubRoutines::_arrayof_jint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy); | |
88 address StubRoutines::_arrayof_jlong_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy); | |
89 address StubRoutines::_arrayof_oop_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy); | |
90 address StubRoutines::_arrayof_jbyte_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy); | |
91 address StubRoutines::_arrayof_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy); | |
92 address StubRoutines::_arrayof_jint_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy); | |
93 address StubRoutines::_arrayof_jlong_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy); | |
94 address StubRoutines::_arrayof_oop_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy); | |
95 | |
96 address StubRoutines::_checkcast_arraycopy = NULL; | |
97 address StubRoutines::_unsafe_arraycopy = NULL; | |
98 address StubRoutines::_generic_arraycopy = NULL; | |
99 | |
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100 double (* StubRoutines::_intrinsic_log )(double) = NULL; |
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101 double (* StubRoutines::_intrinsic_log10 )(double) = NULL; |
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102 double (* StubRoutines::_intrinsic_exp )(double) = NULL; |
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103 double (* StubRoutines::_intrinsic_pow )(double, double) = NULL; |
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104 double (* StubRoutines::_intrinsic_sin )(double) = NULL; |
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105 double (* StubRoutines::_intrinsic_cos )(double) = NULL; |
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106 double (* StubRoutines::_intrinsic_tan )(double) = NULL; |
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107 |
0 | 108 // Initialization |
109 // | |
110 // Note: to break cycle with universe initialization, stubs are generated in two phases. | |
111 // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry). | |
112 // The second phase includes all other stubs (which may depend on universe being initialized.) | |
113 | |
114 extern void StubGenerator_generate(CodeBuffer* code, bool all); // only interface to generators | |
115 | |
116 void StubRoutines::initialize1() { | |
117 if (_code1 == NULL) { | |
118 ResourceMark rm; | |
119 TraceTime timer("StubRoutines generation 1", TraceStartupTime); | |
120 _code1 = BufferBlob::create("StubRoutines (1)", code_size1); | |
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121 if (_code1 == NULL) { |
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122 vm_exit_out_of_memory(code_size1, |
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123 "CodeCache: no room for StubRoutines (1)"); |
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124 } |
0 | 125 CodeBuffer buffer(_code1->instructions_begin(), _code1->instructions_size()); |
126 StubGenerator_generate(&buffer, false); | |
127 } | |
128 } | |
129 | |
130 | |
131 #ifdef ASSERT | |
132 typedef void (*arraycopy_fn)(address src, address dst, int count); | |
133 | |
134 // simple tests of generated arraycopy functions | |
135 static void test_arraycopy_func(address func, int alignment) { | |
136 int v = 0xcc; | |
137 int v2 = 0x11; | |
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138 jlong lbuffer[8]; |
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139 jlong lbuffer2[8]; |
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140 address fbuffer = (address) lbuffer; |
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141 address fbuffer2 = (address) lbuffer2; |
0 | 142 unsigned int i; |
143 for (i = 0; i < sizeof(lbuffer); i++) { | |
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144 fbuffer[i] = v; fbuffer2[i] = v2; |
0 | 145 } |
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146 // C++ does not guarantee jlong[] array alignment to 8 bytes. |
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147 // Use middle of array to check that memory before it is not modified. |
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148 address buffer = (address) round_to((intptr_t)&lbuffer[4], BytesPerLong); |
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149 address buffer2 = (address) round_to((intptr_t)&lbuffer2[4], BytesPerLong); |
0 | 150 // do an aligned copy |
151 ((arraycopy_fn)func)(buffer, buffer2, 0); | |
152 for (i = 0; i < sizeof(lbuffer); i++) { | |
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153 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything"); |
0 | 154 } |
155 // adjust destination alignment | |
156 ((arraycopy_fn)func)(buffer, buffer2 + alignment, 0); | |
157 for (i = 0; i < sizeof(lbuffer); i++) { | |
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158 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything"); |
0 | 159 } |
160 // adjust source alignment | |
161 ((arraycopy_fn)func)(buffer + alignment, buffer2, 0); | |
162 for (i = 0; i < sizeof(lbuffer); i++) { | |
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163 assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything"); |
0 | 164 } |
165 } | |
166 #endif | |
167 | |
168 | |
169 void StubRoutines::initialize2() { | |
170 if (_code2 == NULL) { | |
171 ResourceMark rm; | |
172 TraceTime timer("StubRoutines generation 2", TraceStartupTime); | |
173 _code2 = BufferBlob::create("StubRoutines (2)", code_size2); | |
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174 if (_code2 == NULL) { |
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175 vm_exit_out_of_memory(code_size2, |
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176 "CodeCache: no room for StubRoutines (2)"); |
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177 } |
0 | 178 CodeBuffer buffer(_code2->instructions_begin(), _code2->instructions_size()); |
179 StubGenerator_generate(&buffer, true); | |
180 } | |
181 | |
182 #ifdef ASSERT | |
183 | |
184 #define TEST_ARRAYCOPY(type) \ | |
185 test_arraycopy_func( type##_arraycopy(), sizeof(type)); \ | |
186 test_arraycopy_func( type##_disjoint_arraycopy(), sizeof(type)); \ | |
187 test_arraycopy_func(arrayof_##type##_arraycopy(), sizeof(HeapWord)); \ | |
188 test_arraycopy_func(arrayof_##type##_disjoint_arraycopy(), sizeof(HeapWord)) | |
189 | |
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190 // Make sure all the arraycopy stubs properly handle zero count |
0 | 191 TEST_ARRAYCOPY(jbyte); |
192 TEST_ARRAYCOPY(jshort); | |
193 TEST_ARRAYCOPY(jint); | |
194 TEST_ARRAYCOPY(jlong); | |
195 | |
196 #undef TEST_ARRAYCOPY | |
197 | |
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198 #define TEST_COPYRTN(type) \ |
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199 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_##type##s_atomic), sizeof(type)); \ |
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200 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::arrayof_conjoint_##type##s), (int)MAX2(sizeof(HeapWord), sizeof(type))) |
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201 |
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202 // Make sure all the copy runtime routines properly handle zero count |
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203 TEST_COPYRTN(jbyte); |
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204 TEST_COPYRTN(jshort); |
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205 TEST_COPYRTN(jint); |
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206 TEST_COPYRTN(jlong); |
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207 |
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208 #undef TEST_COPYRTN |
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209 |
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210 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_words), sizeof(HeapWord)); |
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211 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words), sizeof(HeapWord)); |
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212 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words_atomic), sizeof(HeapWord)); |
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213 // Aligned to BytesPerLong |
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214 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_conjoint_words), sizeof(jlong)); |
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215 test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_disjoint_words), sizeof(jlong)); |
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216 |
0 | 217 #endif |
218 } | |
219 | |
220 | |
221 void stubRoutines_init1() { StubRoutines::initialize1(); } | |
222 void stubRoutines_init2() { StubRoutines::initialize2(); } | |
223 | |
224 // | |
225 // Default versions of arraycopy functions | |
226 // | |
227 | |
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228 static void gen_arraycopy_barrier_pre(oop* dest, size_t count) { |
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229 assert(count != 0, "count should be non-zero"); |
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230 assert(count <= (size_t)max_intx, "count too large"); |
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231 BarrierSet* bs = Universe::heap()->barrier_set(); |
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232 assert(bs->has_write_ref_array_pre_opt(), "Must have pre-barrier opt"); |
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233 bs->write_ref_array_pre(dest, (int)count); |
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234 } |
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235 |
0 | 236 static void gen_arraycopy_barrier(oop* dest, size_t count) { |
237 assert(count != 0, "count should be non-zero"); | |
238 BarrierSet* bs = Universe::heap()->barrier_set(); | |
239 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt"); | |
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240 bs->write_ref_array((HeapWord*)dest, count); |
0 | 241 } |
242 | |
243 JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count)) | |
244 #ifndef PRODUCT | |
245 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy | |
246 #endif // !PRODUCT | |
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247 Copy::conjoint_jbytes_atomic(src, dest, count); |
0 | 248 JRT_END |
249 | |
250 JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count)) | |
251 #ifndef PRODUCT | |
252 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy | |
253 #endif // !PRODUCT | |
254 Copy::conjoint_jshorts_atomic(src, dest, count); | |
255 JRT_END | |
256 | |
257 JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count)) | |
258 #ifndef PRODUCT | |
259 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy | |
260 #endif // !PRODUCT | |
261 Copy::conjoint_jints_atomic(src, dest, count); | |
262 JRT_END | |
263 | |
264 JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count)) | |
265 #ifndef PRODUCT | |
266 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path long/double array copy | |
267 #endif // !PRODUCT | |
268 Copy::conjoint_jlongs_atomic(src, dest, count); | |
269 JRT_END | |
270 | |
271 JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count)) | |
272 #ifndef PRODUCT | |
273 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy | |
274 #endif // !PRODUCT | |
275 assert(count != 0, "count should be non-zero"); | |
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276 gen_arraycopy_barrier_pre(dest, count); |
0 | 277 Copy::conjoint_oops_atomic(src, dest, count); |
278 gen_arraycopy_barrier(dest, count); | |
279 JRT_END | |
280 | |
281 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count)) | |
282 #ifndef PRODUCT | |
283 SharedRuntime::_jbyte_array_copy_ctr++; // Slow-path byte array copy | |
284 #endif // !PRODUCT | |
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285 Copy::arrayof_conjoint_jbytes(src, dest, count); |
0 | 286 JRT_END |
287 | |
288 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count)) | |
289 #ifndef PRODUCT | |
290 SharedRuntime::_jshort_array_copy_ctr++; // Slow-path short/char array copy | |
291 #endif // !PRODUCT | |
292 Copy::arrayof_conjoint_jshorts(src, dest, count); | |
293 JRT_END | |
294 | |
295 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count)) | |
296 #ifndef PRODUCT | |
297 SharedRuntime::_jint_array_copy_ctr++; // Slow-path int/float array copy | |
298 #endif // !PRODUCT | |
299 Copy::arrayof_conjoint_jints(src, dest, count); | |
300 JRT_END | |
301 | |
302 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count)) | |
303 #ifndef PRODUCT | |
304 SharedRuntime::_jlong_array_copy_ctr++; // Slow-path int/float array copy | |
305 #endif // !PRODUCT | |
306 Copy::arrayof_conjoint_jlongs(src, dest, count); | |
307 JRT_END | |
308 | |
309 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count)) | |
310 #ifndef PRODUCT | |
311 SharedRuntime::_oop_array_copy_ctr++; // Slow-path oop array copy | |
312 #endif // !PRODUCT | |
313 assert(count != 0, "count should be non-zero"); | |
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314 gen_arraycopy_barrier_pre((oop *) dest, count); |
0 | 315 Copy::arrayof_conjoint_oops(src, dest, count); |
316 gen_arraycopy_barrier((oop *) dest, count); | |
317 JRT_END |