Mercurial > hg > truffle
annotate src/share/vm/runtime/sharedRuntime.cpp @ 2645:b2c1e959be46
Clean up around BlockBegin / StdEntry.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 11 May 2011 14:34:29 +0200 |
parents | b1b58f908044 |
children | 75a99b4f1c98 |
rev | line source |
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0 | 1 /* |
2142 | 2 * Copyright (c) 1997, 2011, 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 "classfile/systemDictionary.hpp" | |
27 #include "classfile/vmSymbols.hpp" | |
28 #include "code/compiledIC.hpp" | |
29 #include "code/scopeDesc.hpp" | |
30 #include "code/vtableStubs.hpp" | |
31 #include "compiler/abstractCompiler.hpp" | |
32 #include "compiler/compileBroker.hpp" | |
33 #include "compiler/compilerOracle.hpp" | |
34 #include "interpreter/interpreter.hpp" | |
35 #include "interpreter/interpreterRuntime.hpp" | |
36 #include "memory/gcLocker.inline.hpp" | |
37 #include "memory/universe.inline.hpp" | |
38 #include "oops/oop.inline.hpp" | |
39 #include "prims/forte.hpp" | |
40 #include "prims/jvmtiExport.hpp" | |
41 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
42 #include "prims/methodHandles.hpp" | |
43 #include "prims/nativeLookup.hpp" | |
44 #include "runtime/arguments.hpp" | |
45 #include "runtime/biasedLocking.hpp" | |
46 #include "runtime/handles.inline.hpp" | |
47 #include "runtime/init.hpp" | |
48 #include "runtime/interfaceSupport.hpp" | |
49 #include "runtime/javaCalls.hpp" | |
50 #include "runtime/sharedRuntime.hpp" | |
51 #include "runtime/stubRoutines.hpp" | |
52 #include "runtime/vframe.hpp" | |
53 #include "runtime/vframeArray.hpp" | |
54 #include "utilities/copy.hpp" | |
55 #include "utilities/dtrace.hpp" | |
56 #include "utilities/events.hpp" | |
57 #include "utilities/hashtable.inline.hpp" | |
58 #include "utilities/xmlstream.hpp" | |
59 #ifdef TARGET_ARCH_x86 | |
60 # include "nativeInst_x86.hpp" | |
61 # include "vmreg_x86.inline.hpp" | |
62 #endif | |
63 #ifdef TARGET_ARCH_sparc | |
64 # include "nativeInst_sparc.hpp" | |
65 # include "vmreg_sparc.inline.hpp" | |
66 #endif | |
67 #ifdef TARGET_ARCH_zero | |
68 # include "nativeInst_zero.hpp" | |
69 # include "vmreg_zero.inline.hpp" | |
70 #endif | |
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71 #ifdef TARGET_ARCH_arm |
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72 # include "nativeInst_arm.hpp" |
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73 # include "vmreg_arm.inline.hpp" |
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74 #endif |
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75 #ifdef TARGET_ARCH_ppc |
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76 # include "nativeInst_ppc.hpp" |
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77 # include "vmreg_ppc.inline.hpp" |
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78 #endif |
1972 | 79 #ifdef COMPILER1 |
80 #include "c1/c1_Runtime1.hpp" | |
81 #endif | |
82 | |
0 | 83 #include <math.h> |
84 | |
85 HS_DTRACE_PROBE_DECL4(hotspot, object__alloc, Thread*, char*, int, size_t); | |
86 HS_DTRACE_PROBE_DECL7(hotspot, method__entry, int, | |
87 char*, int, char*, int, char*, int); | |
88 HS_DTRACE_PROBE_DECL7(hotspot, method__return, int, | |
89 char*, int, char*, int, char*, int); | |
90 | |
91 // Implementation of SharedRuntime | |
92 | |
93 #ifndef PRODUCT | |
94 // For statistics | |
95 int SharedRuntime::_ic_miss_ctr = 0; | |
96 int SharedRuntime::_wrong_method_ctr = 0; | |
97 int SharedRuntime::_resolve_static_ctr = 0; | |
98 int SharedRuntime::_resolve_virtual_ctr = 0; | |
99 int SharedRuntime::_resolve_opt_virtual_ctr = 0; | |
100 int SharedRuntime::_implicit_null_throws = 0; | |
101 int SharedRuntime::_implicit_div0_throws = 0; | |
102 int SharedRuntime::_throw_null_ctr = 0; | |
103 | |
104 int SharedRuntime::_nof_normal_calls = 0; | |
105 int SharedRuntime::_nof_optimized_calls = 0; | |
106 int SharedRuntime::_nof_inlined_calls = 0; | |
107 int SharedRuntime::_nof_megamorphic_calls = 0; | |
108 int SharedRuntime::_nof_static_calls = 0; | |
109 int SharedRuntime::_nof_inlined_static_calls = 0; | |
110 int SharedRuntime::_nof_interface_calls = 0; | |
111 int SharedRuntime::_nof_optimized_interface_calls = 0; | |
112 int SharedRuntime::_nof_inlined_interface_calls = 0; | |
113 int SharedRuntime::_nof_megamorphic_interface_calls = 0; | |
114 int SharedRuntime::_nof_removable_exceptions = 0; | |
115 | |
116 int SharedRuntime::_new_instance_ctr=0; | |
117 int SharedRuntime::_new_array_ctr=0; | |
118 int SharedRuntime::_multi1_ctr=0; | |
119 int SharedRuntime::_multi2_ctr=0; | |
120 int SharedRuntime::_multi3_ctr=0; | |
121 int SharedRuntime::_multi4_ctr=0; | |
122 int SharedRuntime::_multi5_ctr=0; | |
123 int SharedRuntime::_mon_enter_stub_ctr=0; | |
124 int SharedRuntime::_mon_exit_stub_ctr=0; | |
125 int SharedRuntime::_mon_enter_ctr=0; | |
126 int SharedRuntime::_mon_exit_ctr=0; | |
127 int SharedRuntime::_partial_subtype_ctr=0; | |
128 int SharedRuntime::_jbyte_array_copy_ctr=0; | |
129 int SharedRuntime::_jshort_array_copy_ctr=0; | |
130 int SharedRuntime::_jint_array_copy_ctr=0; | |
131 int SharedRuntime::_jlong_array_copy_ctr=0; | |
132 int SharedRuntime::_oop_array_copy_ctr=0; | |
133 int SharedRuntime::_checkcast_array_copy_ctr=0; | |
134 int SharedRuntime::_unsafe_array_copy_ctr=0; | |
135 int SharedRuntime::_generic_array_copy_ctr=0; | |
136 int SharedRuntime::_slow_array_copy_ctr=0; | |
137 int SharedRuntime::_find_handler_ctr=0; | |
138 int SharedRuntime::_rethrow_ctr=0; | |
139 | |
140 int SharedRuntime::_ICmiss_index = 0; | |
141 int SharedRuntime::_ICmiss_count[SharedRuntime::maxICmiss_count]; | |
142 address SharedRuntime::_ICmiss_at[SharedRuntime::maxICmiss_count]; | |
143 | |
144 void SharedRuntime::trace_ic_miss(address at) { | |
145 for (int i = 0; i < _ICmiss_index; i++) { | |
146 if (_ICmiss_at[i] == at) { | |
147 _ICmiss_count[i]++; | |
148 return; | |
149 } | |
150 } | |
151 int index = _ICmiss_index++; | |
152 if (_ICmiss_index >= maxICmiss_count) _ICmiss_index = maxICmiss_count - 1; | |
153 _ICmiss_at[index] = at; | |
154 _ICmiss_count[index] = 1; | |
155 } | |
156 | |
157 void SharedRuntime::print_ic_miss_histogram() { | |
158 if (ICMissHistogram) { | |
159 tty->print_cr ("IC Miss Histogram:"); | |
160 int tot_misses = 0; | |
161 for (int i = 0; i < _ICmiss_index; i++) { | |
162 tty->print_cr(" at: " INTPTR_FORMAT " nof: %d", _ICmiss_at[i], _ICmiss_count[i]); | |
163 tot_misses += _ICmiss_count[i]; | |
164 } | |
165 tty->print_cr ("Total IC misses: %7d", tot_misses); | |
166 } | |
167 } | |
168 #endif // PRODUCT | |
169 | |
342
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170 #ifndef SERIALGC |
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171 |
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172 // G1 write-barrier pre: executed before a pointer store. |
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173 JRT_LEAF(void, SharedRuntime::g1_wb_pre(oopDesc* orig, JavaThread *thread)) |
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174 if (orig == NULL) { |
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175 assert(false, "should be optimized out"); |
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176 return; |
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177 } |
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178 assert(orig->is_oop(true /* ignore mark word */), "Error"); |
342
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179 // store the original value that was in the field reference |
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180 thread->satb_mark_queue().enqueue(orig); |
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181 JRT_END |
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182 |
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183 // G1 write-barrier post: executed after a pointer store. |
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184 JRT_LEAF(void, SharedRuntime::g1_wb_post(void* card_addr, JavaThread* thread)) |
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185 thread->dirty_card_queue().enqueue(card_addr); |
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186 JRT_END |
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187 |
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188 #endif // !SERIALGC |
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189 |
0 | 190 |
191 JRT_LEAF(jlong, SharedRuntime::lmul(jlong y, jlong x)) | |
192 return x * y; | |
193 JRT_END | |
194 | |
195 | |
196 JRT_LEAF(jlong, SharedRuntime::ldiv(jlong y, jlong x)) | |
197 if (x == min_jlong && y == CONST64(-1)) { | |
198 return x; | |
199 } else { | |
200 return x / y; | |
201 } | |
202 JRT_END | |
203 | |
204 | |
205 JRT_LEAF(jlong, SharedRuntime::lrem(jlong y, jlong x)) | |
206 if (x == min_jlong && y == CONST64(-1)) { | |
207 return 0; | |
208 } else { | |
209 return x % y; | |
210 } | |
211 JRT_END | |
212 | |
213 | |
214 const juint float_sign_mask = 0x7FFFFFFF; | |
215 const juint float_infinity = 0x7F800000; | |
216 const julong double_sign_mask = CONST64(0x7FFFFFFFFFFFFFFF); | |
217 const julong double_infinity = CONST64(0x7FF0000000000000); | |
218 | |
219 JRT_LEAF(jfloat, SharedRuntime::frem(jfloat x, jfloat y)) | |
220 #ifdef _WIN64 | |
221 // 64-bit Windows on amd64 returns the wrong values for | |
222 // infinity operands. | |
223 union { jfloat f; juint i; } xbits, ybits; | |
224 xbits.f = x; | |
225 ybits.f = y; | |
226 // x Mod Infinity == x unless x is infinity | |
227 if ( ((xbits.i & float_sign_mask) != float_infinity) && | |
228 ((ybits.i & float_sign_mask) == float_infinity) ) { | |
229 return x; | |
230 } | |
231 #endif | |
232 return ((jfloat)fmod((double)x,(double)y)); | |
233 JRT_END | |
234 | |
235 | |
236 JRT_LEAF(jdouble, SharedRuntime::drem(jdouble x, jdouble y)) | |
237 #ifdef _WIN64 | |
238 union { jdouble d; julong l; } xbits, ybits; | |
239 xbits.d = x; | |
240 ybits.d = y; | |
241 // x Mod Infinity == x unless x is infinity | |
242 if ( ((xbits.l & double_sign_mask) != double_infinity) && | |
243 ((ybits.l & double_sign_mask) == double_infinity) ) { | |
244 return x; | |
245 } | |
246 #endif | |
247 return ((jdouble)fmod((double)x,(double)y)); | |
248 JRT_END | |
249 | |
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250 #ifdef __SOFTFP__ |
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251 JRT_LEAF(jfloat, SharedRuntime::fadd(jfloat x, jfloat y)) |
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252 return x + y; |
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253 JRT_END |
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254 |
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255 JRT_LEAF(jfloat, SharedRuntime::fsub(jfloat x, jfloat y)) |
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256 return x - y; |
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257 JRT_END |
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258 |
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259 JRT_LEAF(jfloat, SharedRuntime::fmul(jfloat x, jfloat y)) |
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260 return x * y; |
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261 JRT_END |
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262 |
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263 JRT_LEAF(jfloat, SharedRuntime::fdiv(jfloat x, jfloat y)) |
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264 return x / y; |
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265 JRT_END |
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266 |
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267 JRT_LEAF(jdouble, SharedRuntime::dadd(jdouble x, jdouble y)) |
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268 return x + y; |
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269 JRT_END |
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270 |
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271 JRT_LEAF(jdouble, SharedRuntime::dsub(jdouble x, jdouble y)) |
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272 return x - y; |
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273 JRT_END |
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274 |
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275 JRT_LEAF(jdouble, SharedRuntime::dmul(jdouble x, jdouble y)) |
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276 return x * y; |
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277 JRT_END |
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278 |
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279 JRT_LEAF(jdouble, SharedRuntime::ddiv(jdouble x, jdouble y)) |
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280 return x / y; |
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281 JRT_END |
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282 |
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283 JRT_LEAF(jfloat, SharedRuntime::i2f(jint x)) |
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284 return (jfloat)x; |
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285 JRT_END |
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286 |
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287 JRT_LEAF(jdouble, SharedRuntime::i2d(jint x)) |
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288 return (jdouble)x; |
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289 JRT_END |
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290 |
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291 JRT_LEAF(jdouble, SharedRuntime::f2d(jfloat x)) |
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292 return (jdouble)x; |
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293 JRT_END |
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294 |
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295 JRT_LEAF(int, SharedRuntime::fcmpl(float x, float y)) |
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296 return x>y ? 1 : (x==y ? 0 : -1); /* x<y or is_nan*/ |
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297 JRT_END |
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298 |
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299 JRT_LEAF(int, SharedRuntime::fcmpg(float x, float y)) |
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300 return x<y ? -1 : (x==y ? 0 : 1); /* x>y or is_nan */ |
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301 JRT_END |
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302 |
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303 JRT_LEAF(int, SharedRuntime::dcmpl(double x, double y)) |
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304 return x>y ? 1 : (x==y ? 0 : -1); /* x<y or is_nan */ |
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305 JRT_END |
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306 |
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307 JRT_LEAF(int, SharedRuntime::dcmpg(double x, double y)) |
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308 return x<y ? -1 : (x==y ? 0 : 1); /* x>y or is_nan */ |
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309 JRT_END |
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310 |
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311 // Functions to return the opposite of the aeabi functions for nan. |
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312 JRT_LEAF(int, SharedRuntime::unordered_fcmplt(float x, float y)) |
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313 return (x < y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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314 JRT_END |
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315 |
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316 JRT_LEAF(int, SharedRuntime::unordered_dcmplt(double x, double y)) |
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317 return (x < y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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318 JRT_END |
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319 |
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320 JRT_LEAF(int, SharedRuntime::unordered_fcmple(float x, float y)) |
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321 return (x <= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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322 JRT_END |
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323 |
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324 JRT_LEAF(int, SharedRuntime::unordered_dcmple(double x, double y)) |
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325 return (x <= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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326 JRT_END |
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327 |
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328 JRT_LEAF(int, SharedRuntime::unordered_fcmpge(float x, float y)) |
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329 return (x >= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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330 JRT_END |
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331 |
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332 JRT_LEAF(int, SharedRuntime::unordered_dcmpge(double x, double y)) |
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333 return (x >= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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334 JRT_END |
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335 |
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336 JRT_LEAF(int, SharedRuntime::unordered_fcmpgt(float x, float y)) |
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337 return (x > y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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338 JRT_END |
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339 |
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340 JRT_LEAF(int, SharedRuntime::unordered_dcmpgt(double x, double y)) |
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341 return (x > y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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342 JRT_END |
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343 |
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344 // Intrinsics make gcc generate code for these. |
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345 float SharedRuntime::fneg(float f) { |
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346 return -f; |
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347 } |
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348 |
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349 double SharedRuntime::dneg(double f) { |
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350 return -f; |
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351 } |
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352 |
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353 #endif // __SOFTFP__ |
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354 |
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355 #if defined(__SOFTFP__) || defined(E500V2) |
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356 // Intrinsics make gcc generate code for these. |
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357 double SharedRuntime::dabs(double f) { |
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358 return (f <= (double)0.0) ? (double)0.0 - f : f; |
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359 } |
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360 |
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361 #endif |
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362 |
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363 #if defined(__SOFTFP__) || defined(PPC) |
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364 double SharedRuntime::dsqrt(double f) { |
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365 return sqrt(f); |
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366 } |
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367 #endif |
0 | 368 |
369 JRT_LEAF(jint, SharedRuntime::f2i(jfloat x)) | |
508
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370 if (g_isnan(x)) |
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371 return 0; |
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372 if (x >= (jfloat) max_jint) |
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373 return max_jint; |
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374 if (x <= (jfloat) min_jint) |
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375 return min_jint; |
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376 return (jint) x; |
0 | 377 JRT_END |
378 | |
379 | |
380 JRT_LEAF(jlong, SharedRuntime::f2l(jfloat x)) | |
508
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381 if (g_isnan(x)) |
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382 return 0; |
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383 if (x >= (jfloat) max_jlong) |
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384 return max_jlong; |
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385 if (x <= (jfloat) min_jlong) |
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386 return min_jlong; |
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387 return (jlong) x; |
0 | 388 JRT_END |
389 | |
390 | |
391 JRT_LEAF(jint, SharedRuntime::d2i(jdouble x)) | |
508
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392 if (g_isnan(x)) |
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393 return 0; |
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394 if (x >= (jdouble) max_jint) |
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395 return max_jint; |
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396 if (x <= (jdouble) min_jint) |
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397 return min_jint; |
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398 return (jint) x; |
0 | 399 JRT_END |
400 | |
401 | |
402 JRT_LEAF(jlong, SharedRuntime::d2l(jdouble x)) | |
508
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403 if (g_isnan(x)) |
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404 return 0; |
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405 if (x >= (jdouble) max_jlong) |
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406 return max_jlong; |
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407 if (x <= (jdouble) min_jlong) |
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408 return min_jlong; |
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409 return (jlong) x; |
0 | 410 JRT_END |
411 | |
412 | |
413 JRT_LEAF(jfloat, SharedRuntime::d2f(jdouble x)) | |
414 return (jfloat)x; | |
415 JRT_END | |
416 | |
417 | |
418 JRT_LEAF(jfloat, SharedRuntime::l2f(jlong x)) | |
419 return (jfloat)x; | |
420 JRT_END | |
421 | |
422 | |
423 JRT_LEAF(jdouble, SharedRuntime::l2d(jlong x)) | |
424 return (jdouble)x; | |
425 JRT_END | |
426 | |
427 // Exception handling accross interpreter/compiler boundaries | |
428 // | |
429 // exception_handler_for_return_address(...) returns the continuation address. | |
430 // The continuation address is the entry point of the exception handler of the | |
431 // previous frame depending on the return address. | |
432 | |
1295 | 433 address SharedRuntime::raw_exception_handler_for_return_address(JavaThread* thread, address return_address) { |
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434 assert(frame::verify_return_pc(return_address), err_msg("must be a return address: " INTPTR_FORMAT, return_address)); |
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435 |
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436 // Reset method handle flag. |
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437 thread->set_is_method_handle_return(false); |
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438 |
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439 // The fastest case first |
0 | 440 CodeBlob* blob = CodeCache::find_blob(return_address); |
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441 nmethod* nm = (blob != NULL) ? blob->as_nmethod_or_null() : NULL; |
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442 if (nm != NULL) { |
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443 // Set flag if return address is a method handle call site. |
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444 thread->set_is_method_handle_return(nm->is_method_handle_return(return_address)); |
0 | 445 // native nmethods don't have exception handlers |
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446 assert(!nm->is_native_method(), "no exception handler"); |
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447 assert(nm->header_begin() != nm->exception_begin(), "no exception handler"); |
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448 if (nm->is_deopt_pc(return_address)) { |
0 | 449 return SharedRuntime::deopt_blob()->unpack_with_exception(); |
450 } else { | |
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451 return nm->exception_begin(); |
0 | 452 } |
453 } | |
454 | |
455 // Entry code | |
456 if (StubRoutines::returns_to_call_stub(return_address)) { | |
457 return StubRoutines::catch_exception_entry(); | |
458 } | |
459 // Interpreted code | |
460 if (Interpreter::contains(return_address)) { | |
461 return Interpreter::rethrow_exception_entry(); | |
462 } | |
463 | |
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464 guarantee(blob == NULL || !blob->is_runtime_stub(), "caller should have skipped stub"); |
0 | 465 guarantee(!VtableStubs::contains(return_address), "NULL exceptions in vtables should have been handled already!"); |
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466 |
0 | 467 #ifndef PRODUCT |
468 { ResourceMark rm; | |
469 tty->print_cr("No exception handler found for exception at " INTPTR_FORMAT " - potential problems:", return_address); | |
470 tty->print_cr("a) exception happened in (new?) code stubs/buffers that is not handled here"); | |
471 tty->print_cr("b) other problem"); | |
472 } | |
473 #endif // PRODUCT | |
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474 |
0 | 475 ShouldNotReachHere(); |
476 return NULL; | |
477 } | |
478 | |
479 | |
1295 | 480 JRT_LEAF(address, SharedRuntime::exception_handler_for_return_address(JavaThread* thread, address return_address)) |
481 return raw_exception_handler_for_return_address(thread, return_address); | |
0 | 482 JRT_END |
483 | |
1295 | 484 |
0 | 485 address SharedRuntime::get_poll_stub(address pc) { |
486 address stub; | |
487 // Look up the code blob | |
488 CodeBlob *cb = CodeCache::find_blob(pc); | |
489 | |
490 // Should be an nmethod | |
491 assert( cb && cb->is_nmethod(), "safepoint polling: pc must refer to an nmethod" ); | |
492 | |
493 // Look up the relocation information | |
494 assert( ((nmethod*)cb)->is_at_poll_or_poll_return(pc), | |
495 "safepoint polling: type must be poll" ); | |
496 | |
497 assert( ((NativeInstruction*)pc)->is_safepoint_poll(), | |
498 "Only polling locations are used for safepoint"); | |
499 | |
500 bool at_poll_return = ((nmethod*)cb)->is_at_poll_return(pc); | |
501 if (at_poll_return) { | |
502 assert(SharedRuntime::polling_page_return_handler_blob() != NULL, | |
503 "polling page return stub not created yet"); | |
1748 | 504 stub = SharedRuntime::polling_page_return_handler_blob()->entry_point(); |
0 | 505 } else { |
506 assert(SharedRuntime::polling_page_safepoint_handler_blob() != NULL, | |
507 "polling page safepoint stub not created yet"); | |
1748 | 508 stub = SharedRuntime::polling_page_safepoint_handler_blob()->entry_point(); |
0 | 509 } |
510 #ifndef PRODUCT | |
511 if( TraceSafepoint ) { | |
512 char buf[256]; | |
513 jio_snprintf(buf, sizeof(buf), | |
514 "... found polling page %s exception at pc = " | |
515 INTPTR_FORMAT ", stub =" INTPTR_FORMAT, | |
516 at_poll_return ? "return" : "loop", | |
517 (intptr_t)pc, (intptr_t)stub); | |
518 tty->print_raw_cr(buf); | |
519 } | |
520 #endif // PRODUCT | |
521 return stub; | |
522 } | |
523 | |
524 | |
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525 oop SharedRuntime::retrieve_receiver( Symbol* sig, frame caller ) { |
0 | 526 assert(caller.is_interpreted_frame(), ""); |
527 int args_size = ArgumentSizeComputer(sig).size() + 1; | |
528 assert(args_size <= caller.interpreter_frame_expression_stack_size(), "receiver must be on interpreter stack"); | |
529 oop result = (oop) *caller.interpreter_frame_tos_at(args_size - 1); | |
530 assert(Universe::heap()->is_in(result) && result->is_oop(), "receiver must be an oop"); | |
531 return result; | |
532 } | |
533 | |
534 | |
535 void SharedRuntime::throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception) { | |
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536 if (JvmtiExport::can_post_on_exceptions()) { |
0 | 537 vframeStream vfst(thread, true); |
538 methodHandle method = methodHandle(thread, vfst.method()); | |
539 address bcp = method()->bcp_from(vfst.bci()); | |
540 JvmtiExport::post_exception_throw(thread, method(), bcp, h_exception()); | |
541 } | |
542 Exceptions::_throw(thread, __FILE__, __LINE__, h_exception); | |
543 } | |
544 | |
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545 void SharedRuntime::throw_and_post_jvmti_exception(JavaThread *thread, Symbol* name, const char *message) { |
0 | 546 Handle h_exception = Exceptions::new_exception(thread, name, message); |
547 throw_and_post_jvmti_exception(thread, h_exception); | |
548 } | |
549 | |
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550 // The interpreter code to call this tracing function is only |
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551 // called/generated when TraceRedefineClasses has the right bits |
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552 // set. Since obsolete methods are never compiled, we don't have |
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553 // to modify the compilers to generate calls to this function. |
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554 // |
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555 JRT_LEAF(int, SharedRuntime::rc_trace_method_entry( |
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556 JavaThread* thread, methodOopDesc* method)) |
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557 assert(RC_TRACE_IN_RANGE(0x00001000, 0x00002000), "wrong call"); |
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558 |
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559 if (method->is_obsolete()) { |
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560 // We are calling an obsolete method, but this is not necessarily |
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561 // an error. Our method could have been redefined just after we |
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562 // fetched the methodOop from the constant pool. |
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563 |
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564 // RC_TRACE macro has an embedded ResourceMark |
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565 RC_TRACE_WITH_THREAD(0x00001000, thread, |
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566 ("calling obsolete method '%s'", |
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567 method->name_and_sig_as_C_string())); |
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568 if (RC_TRACE_ENABLED(0x00002000)) { |
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569 // this option is provided to debug calls to obsolete methods |
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570 guarantee(false, "faulting at call to an obsolete method."); |
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571 } |
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572 } |
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573 return 0; |
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574 JRT_END |
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575 |
0 | 576 // ret_pc points into caller; we are returning caller's exception handler |
577 // for given exception | |
578 address SharedRuntime::compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception, | |
579 bool force_unwind, bool top_frame_only) { | |
580 assert(nm != NULL, "must exist"); | |
581 ResourceMark rm; | |
582 | |
583 ScopeDesc* sd = nm->scope_desc_at(ret_pc); | |
584 // determine handler bci, if any | |
585 EXCEPTION_MARK; | |
586 | |
587 int handler_bci = -1; | |
588 int scope_depth = 0; | |
589 if (!force_unwind) { | |
590 int bci = sd->bci(); | |
591 do { | |
592 bool skip_scope_increment = false; | |
593 // exception handler lookup | |
594 KlassHandle ek (THREAD, exception->klass()); | |
595 handler_bci = sd->method()->fast_exception_handler_bci_for(ek, bci, THREAD); | |
596 if (HAS_PENDING_EXCEPTION) { | |
597 // We threw an exception while trying to find the exception handler. | |
598 // Transfer the new exception to the exception handle which will | |
599 // be set into thread local storage, and do another lookup for an | |
600 // exception handler for this exception, this time starting at the | |
601 // BCI of the exception handler which caused the exception to be | |
602 // thrown (bugs 4307310 and 4546590). Set "exception" reference | |
603 // argument to ensure that the correct exception is thrown (4870175). | |
604 exception = Handle(THREAD, PENDING_EXCEPTION); | |
605 CLEAR_PENDING_EXCEPTION; | |
606 if (handler_bci >= 0) { | |
607 bci = handler_bci; | |
608 handler_bci = -1; | |
609 skip_scope_increment = true; | |
610 } | |
611 } | |
612 if (!top_frame_only && handler_bci < 0 && !skip_scope_increment) { | |
613 sd = sd->sender(); | |
614 if (sd != NULL) { | |
615 bci = sd->bci(); | |
616 } | |
617 ++scope_depth; | |
618 } | |
619 } while (!top_frame_only && handler_bci < 0 && sd != NULL); | |
620 } | |
621 | |
622 // found handling method => lookup exception handler | |
1748 | 623 int catch_pco = ret_pc - nm->code_begin(); |
0 | 624 |
625 ExceptionHandlerTable table(nm); | |
626 HandlerTableEntry *t = table.entry_for(catch_pco, handler_bci, scope_depth); | |
627 if (t == NULL && (nm->is_compiled_by_c1() || handler_bci != -1)) { | |
628 // Allow abbreviated catch tables. The idea is to allow a method | |
629 // to materialize its exceptions without committing to the exact | |
630 // routing of exceptions. In particular this is needed for adding | |
631 // a synthethic handler to unlock monitors when inlining | |
632 // synchonized methods since the unlock path isn't represented in | |
633 // the bytecodes. | |
634 t = table.entry_for(catch_pco, -1, 0); | |
635 } | |
636 | |
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637 #ifdef COMPILER1 |
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638 if (t == NULL && nm->is_compiled_by_c1()) { |
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639 assert(nm->unwind_handler_begin() != NULL, ""); |
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640 return nm->unwind_handler_begin(); |
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641 } |
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642 #endif |
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643 |
0 | 644 if (t == NULL) { |
645 tty->print_cr("MISSING EXCEPTION HANDLER for pc " INTPTR_FORMAT " and handler bci %d", ret_pc, handler_bci); | |
646 tty->print_cr(" Exception:"); | |
647 exception->print(); | |
648 tty->cr(); | |
649 tty->print_cr(" Compiled exception table :"); | |
650 table.print(); | |
651 nm->print_code(); | |
652 guarantee(false, "missing exception handler"); | |
653 return NULL; | |
654 } | |
655 | |
1748 | 656 return nm->code_begin() + t->pco(); |
0 | 657 } |
658 | |
659 JRT_ENTRY(void, SharedRuntime::throw_AbstractMethodError(JavaThread* thread)) | |
660 // These errors occur only at call sites | |
661 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_AbstractMethodError()); | |
662 JRT_END | |
663 | |
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664 JRT_ENTRY(void, SharedRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) |
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665 // These errors occur only at call sites |
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666 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_IncompatibleClassChangeError(), "vtable stub"); |
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667 JRT_END |
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668 |
0 | 669 JRT_ENTRY(void, SharedRuntime::throw_ArithmeticException(JavaThread* thread)) |
670 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArithmeticException(), "/ by zero"); | |
671 JRT_END | |
672 | |
673 JRT_ENTRY(void, SharedRuntime::throw_NullPointerException(JavaThread* thread)) | |
674 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException()); | |
675 JRT_END | |
676 | |
677 JRT_ENTRY(void, SharedRuntime::throw_NullPointerException_at_call(JavaThread* thread)) | |
678 // This entry point is effectively only used for NullPointerExceptions which occur at inline | |
679 // cache sites (when the callee activation is not yet set up) so we are at a call site | |
680 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException()); | |
681 JRT_END | |
682 | |
683 JRT_ENTRY(void, SharedRuntime::throw_StackOverflowError(JavaThread* thread)) | |
684 // We avoid using the normal exception construction in this case because | |
685 // it performs an upcall to Java, and we're already out of stack space. | |
686 klassOop k = SystemDictionary::StackOverflowError_klass(); | |
687 oop exception_oop = instanceKlass::cast(k)->allocate_instance(CHECK); | |
688 Handle exception (thread, exception_oop); | |
689 if (StackTraceInThrowable) { | |
690 java_lang_Throwable::fill_in_stack_trace(exception); | |
691 } | |
692 throw_and_post_jvmti_exception(thread, exception); | |
693 JRT_END | |
694 | |
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695 address SharedRuntime::deoptimization_continuation(JavaThread* thread, address pc, nmethod* nm) |
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696 { |
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697 if (TraceSignals) { |
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698 tty->print_cr(err_msg("Deoptimizing on implicit exception at relative pc=%d in method %s", pc - nm->entry_point(), nm->method()->name()->as_C_string())); |
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699 } |
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700 thread->_ScratchA = (intptr_t)pc; |
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701 return (SharedRuntime::deopt_blob()->jmp_uncommon_trap()); |
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702 } |
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703 |
0 | 704 address SharedRuntime::continuation_for_implicit_exception(JavaThread* thread, |
705 address pc, | |
706 SharedRuntime::ImplicitExceptionKind exception_kind) | |
707 { | |
708 address target_pc = NULL; | |
709 | |
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710 if (TraceSignals) { |
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711 tty->print_cr("Searching for continuation for implicit exception at %d!", pc); |
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712 } |
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713 |
0 | 714 if (Interpreter::contains(pc)) { |
715 #ifdef CC_INTERP | |
716 // C++ interpreter doesn't throw implicit exceptions | |
717 ShouldNotReachHere(); | |
718 #else | |
719 switch (exception_kind) { | |
720 case IMPLICIT_NULL: return Interpreter::throw_NullPointerException_entry(); | |
721 case IMPLICIT_DIVIDE_BY_ZERO: return Interpreter::throw_ArithmeticException_entry(); | |
722 case STACK_OVERFLOW: return Interpreter::throw_StackOverflowError_entry(); | |
723 default: ShouldNotReachHere(); | |
724 } | |
725 #endif // !CC_INTERP | |
726 } else { | |
727 switch (exception_kind) { | |
728 case STACK_OVERFLOW: { | |
729 // Stack overflow only occurs upon frame setup; the callee is | |
730 // going to be unwound. Dispatch to a shared runtime stub | |
731 // which will cause the StackOverflowError to be fabricated | |
732 // and processed. | |
733 // For stack overflow in deoptimization blob, cleanup thread. | |
734 if (thread->deopt_mark() != NULL) { | |
735 Deoptimization::cleanup_deopt_info(thread, NULL); | |
736 } | |
737 return StubRoutines::throw_StackOverflowError_entry(); | |
738 } | |
739 | |
740 case IMPLICIT_NULL: { | |
741 if (VtableStubs::contains(pc)) { | |
742 // We haven't yet entered the callee frame. Fabricate an | |
743 // exception and begin dispatching it in the caller. Since | |
744 // the caller was at a call site, it's safe to destroy all | |
745 // caller-saved registers, as these entry points do. | |
746 VtableStub* vt_stub = VtableStubs::stub_containing(pc); | |
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747 |
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748 // If vt_stub is NULL, then return NULL to signal handler to report the SEGV error. |
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749 if (vt_stub == NULL) return NULL; |
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750 |
0 | 751 if (vt_stub->is_abstract_method_error(pc)) { |
752 assert(!vt_stub->is_vtable_stub(), "should never see AbstractMethodErrors from vtable-type VtableStubs"); | |
753 return StubRoutines::throw_AbstractMethodError_entry(); | |
754 } else { | |
755 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
756 } | |
757 } else { | |
758 CodeBlob* cb = CodeCache::find_blob(pc); | |
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759 |
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760 // If code blob is NULL, then return NULL to signal handler to report the SEGV error. |
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761 if (cb == NULL) return NULL; |
0 | 762 |
763 // Exception happened in CodeCache. Must be either: | |
764 // 1. Inline-cache check in C2I handler blob, | |
765 // 2. Inline-cache check in nmethod, or | |
766 // 3. Implict null exception in nmethod | |
767 | |
768 if (!cb->is_nmethod()) { | |
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769 guarantee(cb->is_adapter_blob() || cb->is_method_handles_adapter_blob(), |
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770 "exception happened outside interpreter, nmethods and vtable stubs (1)"); |
0 | 771 // There is no handler here, so we will simply unwind. |
772 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
773 } | |
774 | |
775 // Otherwise, it's an nmethod. Consult its exception handlers. | |
776 nmethod* nm = (nmethod*)cb; | |
777 if (nm->inlinecache_check_contains(pc)) { | |
778 // exception happened inside inline-cache check code | |
779 // => the nmethod is not yet active (i.e., the frame | |
780 // is not set up yet) => use return address pushed by | |
781 // caller => don't push another return address | |
782 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
783 } | |
784 | |
785 #ifndef PRODUCT | |
786 _implicit_null_throws++; | |
787 #endif | |
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788 if (UseC1X) { |
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789 target_pc = deoptimization_continuation(thread, pc, nm); |
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790 } else { |
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791 target_pc = nm->continuation_for_implicit_exception(pc); |
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792 } |
1250 | 793 // If there's an unexpected fault, target_pc might be NULL, |
794 // in which case we want to fall through into the normal | |
795 // error handling code. | |
0 | 796 } |
797 | |
798 break; // fall through | |
799 } | |
800 | |
801 | |
802 case IMPLICIT_DIVIDE_BY_ZERO: { | |
803 nmethod* nm = CodeCache::find_nmethod(pc); | |
804 guarantee(nm != NULL, "must have containing nmethod for implicit division-by-zero exceptions"); | |
805 #ifndef PRODUCT | |
806 _implicit_div0_throws++; | |
807 #endif | |
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808 if (UseC1X) { |
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809 if (TraceSignals) { |
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810 tty->print_cr("c1x implicit div0"); |
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811 } |
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812 target_pc = deoptimization_continuation(thread, pc, nm); |
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813 } else { |
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814 target_pc = nm->continuation_for_implicit_exception(pc); |
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815 } |
1250 | 816 // If there's an unexpected fault, target_pc might be NULL, |
817 // in which case we want to fall through into the normal | |
818 // error handling code. | |
0 | 819 break; // fall through |
820 } | |
821 | |
822 default: ShouldNotReachHere(); | |
823 } | |
824 | |
825 assert(exception_kind == IMPLICIT_NULL || exception_kind == IMPLICIT_DIVIDE_BY_ZERO, "wrong implicit exception kind"); | |
826 | |
827 // for AbortVMOnException flag | |
828 NOT_PRODUCT(Exceptions::debug_check_abort("java.lang.NullPointerException")); | |
829 if (exception_kind == IMPLICIT_NULL) { | |
830 Events::log("Implicit null exception at " INTPTR_FORMAT " to " INTPTR_FORMAT, pc, target_pc); | |
831 } else { | |
832 Events::log("Implicit division by zero exception at " INTPTR_FORMAT " to " INTPTR_FORMAT, pc, target_pc); | |
833 } | |
834 return target_pc; | |
835 } | |
836 | |
837 ShouldNotReachHere(); | |
838 return NULL; | |
839 } | |
840 | |
841 | |
842 JNI_ENTRY(void, throw_unsatisfied_link_error(JNIEnv* env, ...)) | |
843 { | |
844 THROW(vmSymbols::java_lang_UnsatisfiedLinkError()); | |
845 } | |
846 JNI_END | |
847 | |
848 | |
849 address SharedRuntime::native_method_throw_unsatisfied_link_error_entry() { | |
850 return CAST_FROM_FN_PTR(address, &throw_unsatisfied_link_error); | |
851 } | |
852 | |
853 | |
854 #ifndef PRODUCT | |
855 JRT_ENTRY(intptr_t, SharedRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2)) | |
856 const frame f = thread->last_frame(); | |
857 assert(f.is_interpreted_frame(), "must be an interpreted frame"); | |
858 #ifndef PRODUCT | |
859 methodHandle mh(THREAD, f.interpreter_frame_method()); | |
860 BytecodeTracer::trace(mh, f.interpreter_frame_bcp(), tos, tos2); | |
861 #endif // !PRODUCT | |
862 return preserve_this_value; | |
863 JRT_END | |
864 #endif // !PRODUCT | |
865 | |
866 | |
867 JRT_ENTRY(void, SharedRuntime::yield_all(JavaThread* thread, int attempts)) | |
868 os::yield_all(attempts); | |
869 JRT_END | |
870 | |
871 | |
872 JRT_ENTRY_NO_ASYNC(void, SharedRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) | |
873 assert(obj->is_oop(), "must be a valid oop"); | |
874 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise"); | |
875 instanceKlass::register_finalizer(instanceOop(obj), CHECK); | |
876 JRT_END | |
877 | |
878 | |
879 jlong SharedRuntime::get_java_tid(Thread* thread) { | |
880 if (thread != NULL) { | |
881 if (thread->is_Java_thread()) { | |
882 oop obj = ((JavaThread*)thread)->threadObj(); | |
883 return (obj == NULL) ? 0 : java_lang_Thread::thread_id(obj); | |
884 } | |
885 } | |
886 return 0; | |
887 } | |
888 | |
889 /** | |
890 * This function ought to be a void function, but cannot be because | |
891 * it gets turned into a tail-call on sparc, which runs into dtrace bug | |
892 * 6254741. Once that is fixed we can remove the dummy return value. | |
893 */ | |
894 int SharedRuntime::dtrace_object_alloc(oopDesc* o) { | |
895 return dtrace_object_alloc_base(Thread::current(), o); | |
896 } | |
897 | |
898 int SharedRuntime::dtrace_object_alloc_base(Thread* thread, oopDesc* o) { | |
899 assert(DTraceAllocProbes, "wrong call"); | |
900 Klass* klass = o->blueprint(); | |
901 int size = o->size(); | |
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902 Symbol* name = klass->name(); |
0 | 903 HS_DTRACE_PROBE4(hotspot, object__alloc, get_java_tid(thread), |
904 name->bytes(), name->utf8_length(), size * HeapWordSize); | |
905 return 0; | |
906 } | |
907 | |
908 JRT_LEAF(int, SharedRuntime::dtrace_method_entry( | |
909 JavaThread* thread, methodOopDesc* method)) | |
910 assert(DTraceMethodProbes, "wrong call"); | |
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911 Symbol* kname = method->klass_name(); |
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912 Symbol* name = method->name(); |
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913 Symbol* sig = method->signature(); |
0 | 914 HS_DTRACE_PROBE7(hotspot, method__entry, get_java_tid(thread), |
915 kname->bytes(), kname->utf8_length(), | |
916 name->bytes(), name->utf8_length(), | |
917 sig->bytes(), sig->utf8_length()); | |
918 return 0; | |
919 JRT_END | |
920 | |
921 JRT_LEAF(int, SharedRuntime::dtrace_method_exit( | |
922 JavaThread* thread, methodOopDesc* method)) | |
923 assert(DTraceMethodProbes, "wrong call"); | |
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924 Symbol* kname = method->klass_name(); |
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925 Symbol* name = method->name(); |
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926 Symbol* sig = method->signature(); |
0 | 927 HS_DTRACE_PROBE7(hotspot, method__return, get_java_tid(thread), |
928 kname->bytes(), kname->utf8_length(), | |
929 name->bytes(), name->utf8_length(), | |
930 sig->bytes(), sig->utf8_length()); | |
931 return 0; | |
932 JRT_END | |
933 | |
934 | |
935 // Finds receiver, CallInfo (i.e. receiver method), and calling bytecode) | |
936 // for a call current in progress, i.e., arguments has been pushed on stack | |
937 // put callee has not been invoked yet. Used by: resolve virtual/static, | |
938 // vtable updates, etc. Caller frame must be compiled. | |
939 Handle SharedRuntime::find_callee_info(JavaThread* thread, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS) { | |
940 ResourceMark rm(THREAD); | |
941 | |
942 // last java frame on stack (which includes native call frames) | |
943 vframeStream vfst(thread, true); // Do not skip and javaCalls | |
944 | |
945 return find_callee_info_helper(thread, vfst, bc, callinfo, CHECK_(Handle())); | |
946 } | |
947 | |
948 | |
949 // Finds receiver, CallInfo (i.e. receiver method), and calling bytecode | |
950 // for a call current in progress, i.e., arguments has been pushed on stack | |
951 // but callee has not been invoked yet. Caller frame must be compiled. | |
952 Handle SharedRuntime::find_callee_info_helper(JavaThread* thread, | |
953 vframeStream& vfst, | |
954 Bytecodes::Code& bc, | |
955 CallInfo& callinfo, TRAPS) { | |
956 Handle receiver; | |
957 Handle nullHandle; //create a handy null handle for exception returns | |
958 | |
959 assert(!vfst.at_end(), "Java frame must exist"); | |
960 | |
961 // Find caller and bci from vframe | |
962 methodHandle caller (THREAD, vfst.method()); | |
963 int bci = vfst.bci(); | |
964 | |
965 // Find bytecode | |
2142 | 966 Bytecode_invoke bytecode(caller, bci); |
967 bc = bytecode.java_code(); | |
968 int bytecode_index = bytecode.index(); | |
0 | 969 |
970 // Find receiver for non-static call | |
971 if (bc != Bytecodes::_invokestatic) { | |
972 // This register map must be update since we need to find the receiver for | |
973 // compiled frames. The receiver might be in a register. | |
974 RegisterMap reg_map2(thread); | |
975 frame stubFrame = thread->last_frame(); | |
976 // Caller-frame is a compiled frame | |
977 frame callerFrame = stubFrame.sender(®_map2); | |
978 | |
2142 | 979 methodHandle callee = bytecode.static_target(CHECK_(nullHandle)); |
0 | 980 if (callee.is_null()) { |
981 THROW_(vmSymbols::java_lang_NoSuchMethodException(), nullHandle); | |
982 } | |
983 // Retrieve from a compiled argument list | |
984 receiver = Handle(THREAD, callerFrame.retrieve_receiver(®_map2)); | |
985 | |
986 if (receiver.is_null()) { | |
987 THROW_(vmSymbols::java_lang_NullPointerException(), nullHandle); | |
988 } | |
989 } | |
990 | |
991 // Resolve method. This is parameterized by bytecode. | |
992 constantPoolHandle constants (THREAD, caller->constants()); | |
993 assert (receiver.is_null() || receiver->is_oop(), "wrong receiver"); | |
994 LinkResolver::resolve_invoke(callinfo, receiver, constants, bytecode_index, bc, CHECK_(nullHandle)); | |
995 | |
996 #ifdef ASSERT | |
997 // Check that the receiver klass is of the right subtype and that it is initialized for virtual calls | |
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998 if (bc != Bytecodes::_invokestatic && bc != Bytecodes::_invokedynamic) { |
0 | 999 assert(receiver.not_null(), "should have thrown exception"); |
1000 KlassHandle receiver_klass (THREAD, receiver->klass()); | |
1001 klassOop rk = constants->klass_ref_at(bytecode_index, CHECK_(nullHandle)); | |
1002 // klass is already loaded | |
1003 KlassHandle static_receiver_klass (THREAD, rk); | |
1004 assert(receiver_klass->is_subtype_of(static_receiver_klass()), "actual receiver must be subclass of static receiver klass"); | |
1005 if (receiver_klass->oop_is_instance()) { | |
1006 if (instanceKlass::cast(receiver_klass())->is_not_initialized()) { | |
1007 tty->print_cr("ERROR: Klass not yet initialized!!"); | |
1008 receiver_klass.print(); | |
1009 } | |
1010 assert (!instanceKlass::cast(receiver_klass())->is_not_initialized(), "receiver_klass must be initialized"); | |
1011 } | |
1012 } | |
1013 #endif | |
1014 | |
1015 return receiver; | |
1016 } | |
1017 | |
1018 methodHandle SharedRuntime::find_callee_method(JavaThread* thread, TRAPS) { | |
1019 ResourceMark rm(THREAD); | |
1020 // We need first to check if any Java activations (compiled, interpreted) | |
1021 // exist on the stack since last JavaCall. If not, we need | |
1022 // to get the target method from the JavaCall wrapper. | |
1023 vframeStream vfst(thread, true); // Do not skip any javaCalls | |
1024 methodHandle callee_method; | |
1025 if (vfst.at_end()) { | |
1026 // No Java frames were found on stack since we did the JavaCall. | |
1027 // Hence the stack can only contain an entry_frame. We need to | |
1028 // find the target method from the stub frame. | |
1029 RegisterMap reg_map(thread, false); | |
1030 frame fr = thread->last_frame(); | |
1031 assert(fr.is_runtime_frame(), "must be a runtimeStub"); | |
1032 fr = fr.sender(®_map); | |
1033 assert(fr.is_entry_frame(), "must be"); | |
1034 // fr is now pointing to the entry frame. | |
1035 callee_method = methodHandle(THREAD, fr.entry_frame_call_wrapper()->callee_method()); | |
1036 assert(fr.entry_frame_call_wrapper()->receiver() == NULL || !callee_method->is_static(), "non-null receiver for static call??"); | |
1037 } else { | |
1038 Bytecodes::Code bc; | |
1039 CallInfo callinfo; | |
1040 find_callee_info_helper(thread, vfst, bc, callinfo, CHECK_(methodHandle())); | |
1041 callee_method = callinfo.selected_method(); | |
1042 } | |
1043 assert(callee_method()->is_method(), "must be"); | |
1044 return callee_method; | |
1045 } | |
1046 | |
1047 // Resolves a call. | |
1048 methodHandle SharedRuntime::resolve_helper(JavaThread *thread, | |
1049 bool is_virtual, | |
1050 bool is_optimized, TRAPS) { | |
1051 methodHandle callee_method; | |
1052 callee_method = resolve_sub_helper(thread, is_virtual, is_optimized, THREAD); | |
1053 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { | |
1054 int retry_count = 0; | |
1055 while (!HAS_PENDING_EXCEPTION && callee_method->is_old() && | |
1142 | 1056 callee_method->method_holder() != SystemDictionary::Object_klass()) { |
0 | 1057 // If has a pending exception then there is no need to re-try to |
1058 // resolve this method. | |
1059 // If the method has been redefined, we need to try again. | |
1060 // Hack: we have no way to update the vtables of arrays, so don't | |
1061 // require that java.lang.Object has been updated. | |
1062 | |
1063 // It is very unlikely that method is redefined more than 100 times | |
1064 // in the middle of resolve. If it is looping here more than 100 times | |
1065 // means then there could be a bug here. | |
1066 guarantee((retry_count++ < 100), | |
1067 "Could not resolve to latest version of redefined method"); | |
1068 // method is redefined in the middle of resolve so re-try. | |
1069 callee_method = resolve_sub_helper(thread, is_virtual, is_optimized, THREAD); | |
1070 } | |
1071 } | |
1072 return callee_method; | |
1073 } | |
1074 | |
1075 // Resolves a call. The compilers generate code for calls that go here | |
1076 // and are patched with the real destination of the call. | |
1077 methodHandle SharedRuntime::resolve_sub_helper(JavaThread *thread, | |
1078 bool is_virtual, | |
1079 bool is_optimized, TRAPS) { | |
1080 | |
1081 ResourceMark rm(thread); | |
1082 RegisterMap cbl_map(thread, false); | |
1083 frame caller_frame = thread->last_frame().sender(&cbl_map); | |
1084 | |
1295 | 1085 CodeBlob* caller_cb = caller_frame.cb(); |
1086 guarantee(caller_cb != NULL && caller_cb->is_nmethod(), "must be called from nmethod"); | |
1087 nmethod* caller_nm = caller_cb->as_nmethod_or_null(); | |
0 | 1088 // make sure caller is not getting deoptimized |
1089 // and removed before we are done with it. | |
1090 // CLEANUP - with lazy deopt shouldn't need this lock | |
1295 | 1091 nmethodLocker caller_lock(caller_nm); |
0 | 1092 |
1093 | |
1094 // determine call info & receiver | |
1095 // note: a) receiver is NULL for static calls | |
1096 // b) an exception is thrown if receiver is NULL for non-static calls | |
1097 CallInfo call_info; | |
1098 Bytecodes::Code invoke_code = Bytecodes::_illegal; | |
1099 Handle receiver = find_callee_info(thread, invoke_code, | |
1100 call_info, CHECK_(methodHandle())); | |
1101 methodHandle callee_method = call_info.selected_method(); | |
1102 | |
1103 assert((!is_virtual && invoke_code == Bytecodes::_invokestatic) || | |
1104 ( is_virtual && invoke_code != Bytecodes::_invokestatic), "inconsistent bytecode"); | |
1105 | |
1106 #ifndef PRODUCT | |
1107 // tracing/debugging/statistics | |
1108 int *addr = (is_optimized) ? (&_resolve_opt_virtual_ctr) : | |
1109 (is_virtual) ? (&_resolve_virtual_ctr) : | |
1110 (&_resolve_static_ctr); | |
1111 Atomic::inc(addr); | |
1112 | |
1113 if (TraceCallFixup) { | |
1114 ResourceMark rm(thread); | |
1115 tty->print("resolving %s%s (%s) call to", | |
1116 (is_optimized) ? "optimized " : "", (is_virtual) ? "virtual" : "static", | |
1117 Bytecodes::name(invoke_code)); | |
1118 callee_method->print_short_name(tty); | |
1119 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1120 } | |
1121 #endif | |
1122 | |
1295 | 1123 // JSR 292 |
1124 // If the resolved method is a MethodHandle invoke target the call | |
1125 // site must be a MethodHandle call site. | |
1126 if (callee_method->is_method_handle_invoke()) { | |
1127 assert(caller_nm->is_method_handle_return(caller_frame.pc()), "must be MH call site"); | |
1128 } | |
1129 | |
0 | 1130 // Compute entry points. This might require generation of C2I converter |
1131 // frames, so we cannot be holding any locks here. Furthermore, the | |
1132 // computation of the entry points is independent of patching the call. We | |
1133 // always return the entry-point, but we only patch the stub if the call has | |
1134 // not been deoptimized. Return values: For a virtual call this is an | |
1135 // (cached_oop, destination address) pair. For a static call/optimized | |
1136 // virtual this is just a destination address. | |
1137 | |
1138 StaticCallInfo static_call_info; | |
1139 CompiledICInfo virtual_call_info; | |
1140 | |
1141 // Make sure the callee nmethod does not get deoptimized and removed before | |
1142 // we are done patching the code. | |
1295 | 1143 nmethod* callee_nm = callee_method->code(); |
1144 nmethodLocker nl_callee(callee_nm); | |
0 | 1145 #ifdef ASSERT |
1295 | 1146 address dest_entry_point = callee_nm == NULL ? 0 : callee_nm->entry_point(); // used below |
0 | 1147 #endif |
1148 | |
1149 if (is_virtual) { | |
1150 assert(receiver.not_null(), "sanity check"); | |
1151 bool static_bound = call_info.resolved_method()->can_be_statically_bound(); | |
1152 KlassHandle h_klass(THREAD, receiver->klass()); | |
1153 CompiledIC::compute_monomorphic_entry(callee_method, h_klass, | |
1154 is_optimized, static_bound, virtual_call_info, | |
1155 CHECK_(methodHandle())); | |
1156 } else { | |
1157 // static call | |
1158 CompiledStaticCall::compute_entry(callee_method, static_call_info); | |
1159 } | |
1160 | |
1161 // grab lock, check for deoptimization and potentially patch caller | |
1162 { | |
1163 MutexLocker ml_patch(CompiledIC_lock); | |
1164 | |
1165 // Now that we are ready to patch if the methodOop was redefined then | |
1166 // don't update call site and let the caller retry. | |
1167 | |
1168 if (!callee_method->is_old()) { | |
1169 #ifdef ASSERT | |
1170 // We must not try to patch to jump to an already unloaded method. | |
1171 if (dest_entry_point != 0) { | |
1172 assert(CodeCache::find_blob(dest_entry_point) != NULL, | |
1173 "should not unload nmethod while locked"); | |
1174 } | |
1175 #endif | |
1176 if (is_virtual) { | |
1177 CompiledIC* inline_cache = CompiledIC_before(caller_frame.pc()); | |
1178 if (inline_cache->is_clean()) { | |
1179 inline_cache->set_to_monomorphic(virtual_call_info); | |
1180 } | |
1181 } else { | |
1182 CompiledStaticCall* ssc = compiledStaticCall_before(caller_frame.pc()); | |
1183 if (ssc->is_clean()) ssc->set(static_call_info); | |
1184 } | |
1185 } | |
1186 | |
1187 } // unlock CompiledIC_lock | |
1188 | |
1189 return callee_method; | |
1190 } | |
1191 | |
1192 | |
1193 // Inline caches exist only in compiled code | |
1194 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_ic_miss(JavaThread* thread)) | |
1195 #ifdef ASSERT | |
1196 RegisterMap reg_map(thread, false); | |
1197 frame stub_frame = thread->last_frame(); | |
1198 assert(stub_frame.is_runtime_frame(), "sanity check"); | |
1199 frame caller_frame = stub_frame.sender(®_map); | |
1200 assert(!caller_frame.is_interpreted_frame() && !caller_frame.is_entry_frame(), "unexpected frame"); | |
1201 #endif /* ASSERT */ | |
1202 | |
1203 methodHandle callee_method; | |
1204 JRT_BLOCK | |
1205 callee_method = SharedRuntime::handle_ic_miss_helper(thread, CHECK_NULL); | |
1206 // Return methodOop through TLS | |
1207 thread->set_vm_result(callee_method()); | |
1208 JRT_BLOCK_END | |
1209 // return compiled code entry point after potential safepoints | |
1210 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1211 return callee_method->verified_code_entry(); | |
1212 JRT_END | |
1213 | |
1214 | |
1215 // Handle call site that has been made non-entrant | |
1216 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method(JavaThread* thread)) | |
1217 // 6243940 We might end up in here if the callee is deoptimized | |
1218 // as we race to call it. We don't want to take a safepoint if | |
1219 // the caller was interpreted because the caller frame will look | |
1220 // interpreted to the stack walkers and arguments are now | |
1221 // "compiled" so it is much better to make this transition | |
1222 // invisible to the stack walking code. The i2c path will | |
1223 // place the callee method in the callee_target. It is stashed | |
1224 // there because if we try and find the callee by normal means a | |
1225 // safepoint is possible and have trouble gc'ing the compiled args. | |
1226 RegisterMap reg_map(thread, false); | |
1227 frame stub_frame = thread->last_frame(); | |
1228 assert(stub_frame.is_runtime_frame(), "sanity check"); | |
1229 frame caller_frame = stub_frame.sender(®_map); | |
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1230 |
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1231 // MethodHandle invokes don't have a CompiledIC and should always |
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1232 // simply redispatch to the callee_target. |
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1233 address sender_pc = caller_frame.pc(); |
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1234 CodeBlob* sender_cb = caller_frame.cb(); |
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1235 nmethod* sender_nm = sender_cb->as_nmethod_or_null(); |
1204 | 1236 bool is_mh_invoke_via_adapter = false; // Direct c2c call or via adapter? |
1237 if (sender_nm != NULL && sender_nm->is_method_handle_return(sender_pc)) { | |
1238 // If the callee_target is set, then we have come here via an i2c | |
1239 // adapter. | |
1240 methodOop callee = thread->callee_target(); | |
1241 if (callee != NULL) { | |
1242 assert(callee->is_method(), "sanity"); | |
1243 is_mh_invoke_via_adapter = true; | |
1244 } | |
1245 } | |
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1246 |
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1247 if (caller_frame.is_interpreted_frame() || |
1204 | 1248 caller_frame.is_entry_frame() || |
1249 is_mh_invoke_via_adapter) { | |
0 | 1250 methodOop callee = thread->callee_target(); |
1251 guarantee(callee != NULL && callee->is_method(), "bad handshake"); | |
1252 thread->set_vm_result(callee); | |
1253 thread->set_callee_target(NULL); | |
1254 return callee->get_c2i_entry(); | |
1255 } | |
1256 | |
1257 // Must be compiled to compiled path which is safe to stackwalk | |
1258 methodHandle callee_method; | |
1259 JRT_BLOCK | |
1260 // Force resolving of caller (if we called from compiled frame) | |
1261 callee_method = SharedRuntime::reresolve_call_site(thread, CHECK_NULL); | |
1262 thread->set_vm_result(callee_method()); | |
1263 JRT_BLOCK_END | |
1264 // return compiled code entry point after potential safepoints | |
1265 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1266 return callee_method->verified_code_entry(); | |
1267 JRT_END | |
1268 | |
1269 | |
1270 // resolve a static call and patch code | |
1271 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_static_call_C(JavaThread *thread )) | |
1272 methodHandle callee_method; | |
1273 JRT_BLOCK | |
1274 callee_method = SharedRuntime::resolve_helper(thread, false, false, CHECK_NULL); | |
1275 thread->set_vm_result(callee_method()); | |
1276 JRT_BLOCK_END | |
1277 // return compiled code entry point after potential safepoints | |
1278 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1279 return callee_method->verified_code_entry(); | |
1280 JRT_END | |
1281 | |
1282 | |
1283 // resolve virtual call and update inline cache to monomorphic | |
1284 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_virtual_call_C(JavaThread *thread )) | |
1285 methodHandle callee_method; | |
1286 JRT_BLOCK | |
1287 callee_method = SharedRuntime::resolve_helper(thread, true, false, CHECK_NULL); | |
1288 thread->set_vm_result(callee_method()); | |
1289 JRT_BLOCK_END | |
1290 // return compiled code entry point after potential safepoints | |
1291 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1292 return callee_method->verified_code_entry(); | |
1293 JRT_END | |
1294 | |
1295 | |
1296 // Resolve a virtual call that can be statically bound (e.g., always | |
1297 // monomorphic, so it has no inline cache). Patch code to resolved target. | |
1298 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_opt_virtual_call_C(JavaThread *thread)) | |
1299 methodHandle callee_method; | |
1300 JRT_BLOCK | |
1301 callee_method = SharedRuntime::resolve_helper(thread, true, true, CHECK_NULL); | |
1302 thread->set_vm_result(callee_method()); | |
1303 JRT_BLOCK_END | |
1304 // return compiled code entry point after potential safepoints | |
1305 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1306 return callee_method->verified_code_entry(); | |
1307 JRT_END | |
1308 | |
1309 | |
1310 | |
1311 | |
1312 | |
1313 methodHandle SharedRuntime::handle_ic_miss_helper(JavaThread *thread, TRAPS) { | |
1314 ResourceMark rm(thread); | |
1315 CallInfo call_info; | |
1316 Bytecodes::Code bc; | |
1317 | |
1318 // receiver is NULL for static calls. An exception is thrown for NULL | |
1319 // receivers for non-static calls | |
1320 Handle receiver = find_callee_info(thread, bc, call_info, | |
1321 CHECK_(methodHandle())); | |
1322 // Compiler1 can produce virtual call sites that can actually be statically bound | |
1323 // If we fell thru to below we would think that the site was going megamorphic | |
1324 // when in fact the site can never miss. Worse because we'd think it was megamorphic | |
1325 // we'd try and do a vtable dispatch however methods that can be statically bound | |
1326 // don't have vtable entries (vtable_index < 0) and we'd blow up. So we force a | |
1327 // reresolution of the call site (as if we did a handle_wrong_method and not an | |
1328 // plain ic_miss) and the site will be converted to an optimized virtual call site | |
1329 // never to miss again. I don't believe C2 will produce code like this but if it | |
1330 // did this would still be the correct thing to do for it too, hence no ifdef. | |
1331 // | |
1332 if (call_info.resolved_method()->can_be_statically_bound()) { | |
1333 methodHandle callee_method = SharedRuntime::reresolve_call_site(thread, CHECK_(methodHandle())); | |
1334 if (TraceCallFixup) { | |
1335 RegisterMap reg_map(thread, false); | |
1336 frame caller_frame = thread->last_frame().sender(®_map); | |
1337 ResourceMark rm(thread); | |
1338 tty->print("converting IC miss to reresolve (%s) call to", Bytecodes::name(bc)); | |
1339 callee_method->print_short_name(tty); | |
1340 tty->print_cr(" from pc: " INTPTR_FORMAT, caller_frame.pc()); | |
1341 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1342 } | |
1343 return callee_method; | |
1344 } | |
1345 | |
1346 methodHandle callee_method = call_info.selected_method(); | |
1347 | |
1348 bool should_be_mono = false; | |
1349 | |
1350 #ifndef PRODUCT | |
1351 Atomic::inc(&_ic_miss_ctr); | |
1352 | |
1353 // Statistics & Tracing | |
1354 if (TraceCallFixup) { | |
1355 ResourceMark rm(thread); | |
1356 tty->print("IC miss (%s) call to", Bytecodes::name(bc)); | |
1357 callee_method->print_short_name(tty); | |
1358 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1359 } | |
1360 | |
1361 if (ICMissHistogram) { | |
1362 MutexLocker m(VMStatistic_lock); | |
1363 RegisterMap reg_map(thread, false); | |
1364 frame f = thread->last_frame().real_sender(®_map);// skip runtime stub | |
1365 // produce statistics under the lock | |
1366 trace_ic_miss(f.pc()); | |
1367 } | |
1368 #endif | |
1369 | |
1370 // install an event collector so that when a vtable stub is created the | |
1371 // profiler can be notified via a DYNAMIC_CODE_GENERATED event. The | |
1372 // event can't be posted when the stub is created as locks are held | |
1373 // - instead the event will be deferred until the event collector goes | |
1374 // out of scope. | |
1375 JvmtiDynamicCodeEventCollector event_collector; | |
1376 | |
1377 // Update inline cache to megamorphic. Skip update if caller has been | |
1378 // made non-entrant or we are called from interpreted. | |
1379 { MutexLocker ml_patch (CompiledIC_lock); | |
1380 RegisterMap reg_map(thread, false); | |
1381 frame caller_frame = thread->last_frame().sender(®_map); | |
1382 CodeBlob* cb = caller_frame.cb(); | |
1383 if (cb->is_nmethod() && ((nmethod*)cb)->is_in_use()) { | |
1384 // Not a non-entrant nmethod, so find inline_cache | |
1385 CompiledIC* inline_cache = CompiledIC_before(caller_frame.pc()); | |
1386 bool should_be_mono = false; | |
1387 if (inline_cache->is_optimized()) { | |
1388 if (TraceCallFixup) { | |
1389 ResourceMark rm(thread); | |
1390 tty->print("OPTIMIZED IC miss (%s) call to", Bytecodes::name(bc)); | |
1391 callee_method->print_short_name(tty); | |
1392 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1393 } | |
1394 should_be_mono = true; | |
1395 } else { | |
1396 compiledICHolderOop ic_oop = (compiledICHolderOop) inline_cache->cached_oop(); | |
1397 if ( ic_oop != NULL && ic_oop->is_compiledICHolder()) { | |
1398 | |
1399 if (receiver()->klass() == ic_oop->holder_klass()) { | |
1400 // This isn't a real miss. We must have seen that compiled code | |
1401 // is now available and we want the call site converted to a | |
1402 // monomorphic compiled call site. | |
1403 // We can't assert for callee_method->code() != NULL because it | |
1404 // could have been deoptimized in the meantime | |
1405 if (TraceCallFixup) { | |
1406 ResourceMark rm(thread); | |
1407 tty->print("FALSE IC miss (%s) converting to compiled call to", Bytecodes::name(bc)); | |
1408 callee_method->print_short_name(tty); | |
1409 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1410 } | |
1411 should_be_mono = true; | |
1412 } | |
1413 } | |
1414 } | |
1415 | |
1416 if (should_be_mono) { | |
1417 | |
1418 // We have a path that was monomorphic but was going interpreted | |
1419 // and now we have (or had) a compiled entry. We correct the IC | |
1420 // by using a new icBuffer. | |
1421 CompiledICInfo info; | |
1422 KlassHandle receiver_klass(THREAD, receiver()->klass()); | |
1423 inline_cache->compute_monomorphic_entry(callee_method, | |
1424 receiver_klass, | |
1425 inline_cache->is_optimized(), | |
1426 false, | |
1427 info, CHECK_(methodHandle())); | |
1428 inline_cache->set_to_monomorphic(info); | |
1429 } else if (!inline_cache->is_megamorphic() && !inline_cache->is_clean()) { | |
1430 // Change to megamorphic | |
1431 inline_cache->set_to_megamorphic(&call_info, bc, CHECK_(methodHandle())); | |
1432 } else { | |
1433 // Either clean or megamorphic | |
1434 } | |
1435 } | |
1436 } // Release CompiledIC_lock | |
1437 | |
1438 return callee_method; | |
1439 } | |
1440 | |
1441 // | |
1442 // Resets a call-site in compiled code so it will get resolved again. | |
1443 // This routines handles both virtual call sites, optimized virtual call | |
1444 // sites, and static call sites. Typically used to change a call sites | |
1445 // destination from compiled to interpreted. | |
1446 // | |
1447 methodHandle SharedRuntime::reresolve_call_site(JavaThread *thread, TRAPS) { | |
1448 ResourceMark rm(thread); | |
1449 RegisterMap reg_map(thread, false); | |
1450 frame stub_frame = thread->last_frame(); | |
1451 assert(stub_frame.is_runtime_frame(), "must be a runtimeStub"); | |
1452 frame caller = stub_frame.sender(®_map); | |
1453 | |
1454 // Do nothing if the frame isn't a live compiled frame. | |
1455 // nmethod could be deoptimized by the time we get here | |
1456 // so no update to the caller is needed. | |
1457 | |
1458 if (caller.is_compiled_frame() && !caller.is_deoptimized_frame()) { | |
1459 | |
1460 address pc = caller.pc(); | |
1461 Events::log("update call-site at pc " INTPTR_FORMAT, pc); | |
1462 | |
1463 // Default call_addr is the location of the "basic" call. | |
1464 // Determine the address of the call we a reresolving. With | |
1465 // Inline Caches we will always find a recognizable call. | |
1466 // With Inline Caches disabled we may or may not find a | |
1467 // recognizable call. We will always find a call for static | |
1468 // calls and for optimized virtual calls. For vanilla virtual | |
1469 // calls it depends on the state of the UseInlineCaches switch. | |
1470 // | |
1471 // With Inline Caches disabled we can get here for a virtual call | |
1472 // for two reasons: | |
1473 // 1 - calling an abstract method. The vtable for abstract methods | |
1474 // will run us thru handle_wrong_method and we will eventually | |
1475 // end up in the interpreter to throw the ame. | |
1476 // 2 - a racing deoptimization. We could be doing a vanilla vtable | |
1477 // call and between the time we fetch the entry address and | |
1478 // we jump to it the target gets deoptimized. Similar to 1 | |
1479 // we will wind up in the interprter (thru a c2i with c2). | |
1480 // | |
1481 address call_addr = NULL; | |
1482 { | |
1483 // Get call instruction under lock because another thread may be | |
1484 // busy patching it. | |
1485 MutexLockerEx ml_patch(Patching_lock, Mutex::_no_safepoint_check_flag); | |
1486 // Location of call instruction | |
1487 if (NativeCall::is_call_before(pc)) { | |
1488 NativeCall *ncall = nativeCall_before(pc); | |
1489 call_addr = ncall->instruction_address(); | |
1490 } | |
1491 } | |
1492 | |
1493 // Check for static or virtual call | |
1494 bool is_static_call = false; | |
1495 nmethod* caller_nm = CodeCache::find_nmethod(pc); | |
1496 // Make sure nmethod doesn't get deoptimized and removed until | |
1497 // this is done with it. | |
1498 // CLEANUP - with lazy deopt shouldn't need this lock | |
1499 nmethodLocker nmlock(caller_nm); | |
1500 | |
1501 if (call_addr != NULL) { | |
1502 RelocIterator iter(caller_nm, call_addr, call_addr+1); | |
1503 int ret = iter.next(); // Get item | |
1504 if (ret) { | |
1505 assert(iter.addr() == call_addr, "must find call"); | |
1506 if (iter.type() == relocInfo::static_call_type) { | |
1507 is_static_call = true; | |
1508 } else { | |
1509 assert(iter.type() == relocInfo::virtual_call_type || | |
1510 iter.type() == relocInfo::opt_virtual_call_type | |
1511 , "unexpected relocInfo. type"); | |
1512 } | |
1513 } else { | |
1514 assert(!UseInlineCaches, "relocation info. must exist for this address"); | |
1515 } | |
1516 | |
1517 // Cleaning the inline cache will force a new resolve. This is more robust | |
1518 // than directly setting it to the new destination, since resolving of calls | |
1519 // is always done through the same code path. (experience shows that it | |
1520 // leads to very hard to track down bugs, if an inline cache gets updated | |
1521 // to a wrong method). It should not be performance critical, since the | |
1522 // resolve is only done once. | |
1523 | |
1524 MutexLocker ml(CompiledIC_lock); | |
1525 // | |
1526 // We do not patch the call site if the nmethod has been made non-entrant | |
1527 // as it is a waste of time | |
1528 // | |
1529 if (caller_nm->is_in_use()) { | |
1530 if (is_static_call) { | |
1531 CompiledStaticCall* ssc= compiledStaticCall_at(call_addr); | |
1532 ssc->set_to_clean(); | |
1533 } else { | |
1534 // compiled, dispatched call (which used to call an interpreted method) | |
1535 CompiledIC* inline_cache = CompiledIC_at(call_addr); | |
1536 inline_cache->set_to_clean(); | |
1537 } | |
1538 } | |
1539 } | |
1540 | |
1541 } | |
1542 | |
1543 methodHandle callee_method = find_callee_method(thread, CHECK_(methodHandle())); | |
1544 | |
1545 | |
1546 #ifndef PRODUCT | |
1547 Atomic::inc(&_wrong_method_ctr); | |
1548 | |
1549 if (TraceCallFixup) { | |
1550 ResourceMark rm(thread); | |
1551 tty->print("handle_wrong_method reresolving call to"); | |
1552 callee_method->print_short_name(tty); | |
1553 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1554 } | |
1555 #endif | |
1556 | |
1557 return callee_method; | |
1558 } | |
1559 | |
1560 // --------------------------------------------------------------------------- | |
1561 // We are calling the interpreter via a c2i. Normally this would mean that | |
1562 // we were called by a compiled method. However we could have lost a race | |
1563 // where we went int -> i2c -> c2i and so the caller could in fact be | |
1205 | 1564 // interpreted. If the caller is compiled we attempt to patch the caller |
0 | 1565 // so he no longer calls into the interpreter. |
1566 IRT_LEAF(void, SharedRuntime::fixup_callers_callsite(methodOopDesc* method, address caller_pc)) | |
1567 methodOop moop(method); | |
1568 | |
1569 address entry_point = moop->from_compiled_entry(); | |
1570 | |
1571 // It's possible that deoptimization can occur at a call site which hasn't | |
1572 // been resolved yet, in which case this function will be called from | |
1573 // an nmethod that has been patched for deopt and we can ignore the | |
1574 // request for a fixup. | |
1575 // Also it is possible that we lost a race in that from_compiled_entry | |
1576 // is now back to the i2c in that case we don't need to patch and if | |
1577 // we did we'd leap into space because the callsite needs to use | |
1578 // "to interpreter" stub in order to load up the methodOop. Don't | |
1579 // ask me how I know this... | |
1580 | |
1581 CodeBlob* cb = CodeCache::find_blob(caller_pc); | |
1205 | 1582 if (!cb->is_nmethod() || entry_point == moop->get_c2i_entry()) { |
1583 return; | |
1584 } | |
1585 | |
1586 // The check above makes sure this is a nmethod. | |
1587 nmethod* nm = cb->as_nmethod_or_null(); | |
1588 assert(nm, "must be"); | |
1589 | |
1590 // Don't fixup MethodHandle call sites as c2i/i2c adapters are used | |
1591 // to implement MethodHandle actions. | |
1592 if (nm->is_method_handle_return(caller_pc)) { | |
0 | 1593 return; |
1594 } | |
1595 | |
1596 // There is a benign race here. We could be attempting to patch to a compiled | |
1597 // entry point at the same time the callee is being deoptimized. If that is | |
1598 // the case then entry_point may in fact point to a c2i and we'd patch the | |
1599 // call site with the same old data. clear_code will set code() to NULL | |
1600 // at the end of it. If we happen to see that NULL then we can skip trying | |
1601 // to patch. If we hit the window where the callee has a c2i in the | |
1602 // from_compiled_entry and the NULL isn't present yet then we lose the race | |
1603 // and patch the code with the same old data. Asi es la vida. | |
1604 | |
1605 if (moop->code() == NULL) return; | |
1606 | |
1205 | 1607 if (nm->is_in_use()) { |
0 | 1608 |
1609 // Expect to find a native call there (unless it was no-inline cache vtable dispatch) | |
1610 MutexLockerEx ml_patch(Patching_lock, Mutex::_no_safepoint_check_flag); | |
1611 if (NativeCall::is_call_before(caller_pc + frame::pc_return_offset)) { | |
1612 NativeCall *call = nativeCall_before(caller_pc + frame::pc_return_offset); | |
1613 // | |
1614 // bug 6281185. We might get here after resolving a call site to a vanilla | |
1615 // virtual call. Because the resolvee uses the verified entry it may then | |
1616 // see compiled code and attempt to patch the site by calling us. This would | |
1617 // then incorrectly convert the call site to optimized and its downhill from | |
1618 // there. If you're lucky you'll get the assert in the bugid, if not you've | |
1619 // just made a call site that could be megamorphic into a monomorphic site | |
1620 // for the rest of its life! Just another racing bug in the life of | |
1621 // fixup_callers_callsite ... | |
1622 // | |
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1623 RelocIterator iter(nm, call->instruction_address(), call->next_instruction_address()); |
0 | 1624 iter.next(); |
1625 assert(iter.has_current(), "must have a reloc at java call site"); | |
1626 relocInfo::relocType typ = iter.reloc()->type(); | |
1627 if ( typ != relocInfo::static_call_type && | |
1628 typ != relocInfo::opt_virtual_call_type && | |
1629 typ != relocInfo::static_stub_type) { | |
1630 return; | |
1631 } | |
1632 address destination = call->destination(); | |
1633 if (destination != entry_point) { | |
1634 CodeBlob* callee = CodeCache::find_blob(destination); | |
1635 // callee == cb seems weird. It means calling interpreter thru stub. | |
1636 if (callee == cb || callee->is_adapter_blob()) { | |
1637 // static call or optimized virtual | |
1638 if (TraceCallFixup) { | |
1204 | 1639 tty->print("fixup callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); |
0 | 1640 moop->print_short_name(tty); |
1641 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
1642 } | |
1643 call->set_destination_mt_safe(entry_point); | |
1644 } else { | |
1645 if (TraceCallFixup) { | |
1646 tty->print("failed to fixup callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); | |
1647 moop->print_short_name(tty); | |
1648 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
1649 } | |
1650 // assert is too strong could also be resolve destinations. | |
1651 // assert(InlineCacheBuffer::contains(destination) || VtableStubs::contains(destination), "must be"); | |
1652 } | |
1653 } else { | |
1654 if (TraceCallFixup) { | |
1204 | 1655 tty->print("already patched callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); |
0 | 1656 moop->print_short_name(tty); |
1657 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
1658 } | |
1659 } | |
1660 } | |
1661 } | |
1662 | |
1663 IRT_END | |
1664 | |
1665 | |
1666 // same as JVM_Arraycopy, but called directly from compiled code | |
1667 JRT_ENTRY(void, SharedRuntime::slow_arraycopy_C(oopDesc* src, jint src_pos, | |
1668 oopDesc* dest, jint dest_pos, | |
1669 jint length, | |
1670 JavaThread* thread)) { | |
1671 #ifndef PRODUCT | |
1672 _slow_array_copy_ctr++; | |
1673 #endif | |
1674 // Check if we have null pointers | |
1675 if (src == NULL || dest == NULL) { | |
1676 THROW(vmSymbols::java_lang_NullPointerException()); | |
1677 } | |
1678 // Do the copy. The casts to arrayOop are necessary to the copy_array API, | |
1679 // even though the copy_array API also performs dynamic checks to ensure | |
1680 // that src and dest are truly arrays (and are conformable). | |
1681 // The copy_array mechanism is awkward and could be removed, but | |
1682 // the compilers don't call this function except as a last resort, | |
1683 // so it probably doesn't matter. | |
1684 Klass::cast(src->klass())->copy_array((arrayOopDesc*)src, src_pos, | |
1685 (arrayOopDesc*)dest, dest_pos, | |
1686 length, thread); | |
1687 } | |
1688 JRT_END | |
1689 | |
1690 char* SharedRuntime::generate_class_cast_message( | |
1691 JavaThread* thread, const char* objName) { | |
1692 | |
1693 // Get target class name from the checkcast instruction | |
1694 vframeStream vfst(thread, true); | |
1695 assert(!vfst.at_end(), "Java frame must exist"); | |
2142 | 1696 Bytecode_checkcast cc(vfst.method(), vfst.method()->bcp_from(vfst.bci())); |
0 | 1697 Klass* targetKlass = Klass::cast(vfst.method()->constants()->klass_at( |
2142 | 1698 cc.index(), thread)); |
0 | 1699 return generate_class_cast_message(objName, targetKlass->external_name()); |
1700 } | |
1701 | |
710 | 1702 char* SharedRuntime::generate_wrong_method_type_message(JavaThread* thread, |
1703 oopDesc* required, | |
1704 oopDesc* actual) { | |
1793
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1705 if (TraceMethodHandles) { |
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1706 tty->print_cr("WrongMethodType thread="PTR_FORMAT" req="PTR_FORMAT" act="PTR_FORMAT"", |
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1707 thread, required, actual); |
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1708 } |
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1709 assert(EnableInvokeDynamic, ""); |
710 | 1710 oop singleKlass = wrong_method_type_is_for_single_argument(thread, required); |
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1711 char* message = NULL; |
710 | 1712 if (singleKlass != NULL) { |
1713 const char* objName = "argument or return value"; | |
1714 if (actual != NULL) { | |
1715 // be flexible about the junk passed in: | |
1716 klassOop ak = (actual->is_klass() | |
1717 ? (klassOop)actual | |
1718 : actual->klass()); | |
1719 objName = Klass::cast(ak)->external_name(); | |
1720 } | |
1721 Klass* targetKlass = Klass::cast(required->is_klass() | |
1722 ? (klassOop)required | |
1723 : java_lang_Class::as_klassOop(required)); | |
1793
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1724 message = generate_class_cast_message(objName, targetKlass->external_name()); |
710 | 1725 } else { |
1726 // %%% need to get the MethodType string, without messing around too much | |
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1727 const char* desc = NULL; |
710 | 1728 // Get a signature from the invoke instruction |
1729 const char* mhName = "method handle"; | |
1730 const char* targetType = "the required signature"; | |
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1731 int targetArity = -1, mhArity = -1; |
710 | 1732 vframeStream vfst(thread, true); |
1733 if (!vfst.at_end()) { | |
2142 | 1734 Bytecode_invoke call(vfst.method(), vfst.bci()); |
710 | 1735 methodHandle target; |
1736 { | |
1737 EXCEPTION_MARK; | |
2142 | 1738 target = call.static_target(THREAD); |
710 | 1739 if (HAS_PENDING_EXCEPTION) { CLEAR_PENDING_EXCEPTION; } |
1740 } | |
1741 if (target.not_null() | |
1742 && target->is_method_handle_invoke() | |
1743 && required == target->method_handle_type()) { | |
1744 targetType = target->signature()->as_C_string(); | |
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1745 targetArity = ArgumentCount(target->signature()).size(); |
710 | 1746 } |
1747 } | |
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1748 klassOop kignore; int dmf_flags = 0; |
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1749 methodOop actual_method = MethodHandles::decode_method(actual, kignore, dmf_flags); |
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1750 if ((dmf_flags & ~(MethodHandles::_dmf_has_receiver | |
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1751 MethodHandles::_dmf_does_dispatch | |
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1752 MethodHandles::_dmf_from_interface)) != 0) |
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1753 actual_method = NULL; // MH does extra binds, drops, etc. |
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1754 bool has_receiver = ((dmf_flags & MethodHandles::_dmf_has_receiver) != 0); |
710 | 1755 if (actual_method != NULL) { |
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1756 mhName = actual_method->signature()->as_C_string(); |
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1757 mhArity = ArgumentCount(actual_method->signature()).size(); |
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1758 if (!actual_method->is_static()) mhArity += 1; |
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1759 } else if (java_lang_invoke_MethodHandle::is_instance(actual)) { |
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1760 oopDesc* mhType = java_lang_invoke_MethodHandle::type(actual); |
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1761 mhArity = java_lang_invoke_MethodType::ptype_count(mhType); |
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1762 stringStream st; |
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1763 java_lang_invoke_MethodType::print_signature(mhType, &st); |
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1764 mhName = st.as_string(); |
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1765 } |
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1766 if (targetArity != -1 && targetArity != mhArity) { |
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1767 if (has_receiver && targetArity == mhArity-1) |
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1768 desc = " cannot be called without a receiver argument as "; |
710 | 1769 else |
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1770 desc = " cannot be called with a different arity as "; |
710 | 1771 } |
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1772 message = generate_class_cast_message(mhName, targetType, |
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1773 desc != NULL ? desc : |
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1774 " cannot be called as "); |
710 | 1775 } |
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1776 if (TraceMethodHandles) { |
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1777 tty->print_cr("WrongMethodType => message=%s", message); |
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1778 } |
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1779 return message; |
710 | 1780 } |
1781 | |
1782 oop SharedRuntime::wrong_method_type_is_for_single_argument(JavaThread* thr, | |
1783 oopDesc* required) { | |
1784 if (required == NULL) return NULL; | |
1142 | 1785 if (required->klass() == SystemDictionary::Class_klass()) |
710 | 1786 return required; |
1787 if (required->is_klass()) | |
1788 return Klass::cast(klassOop(required))->java_mirror(); | |
1789 return NULL; | |
1790 } | |
1791 | |
1792 | |
0 | 1793 char* SharedRuntime::generate_class_cast_message( |
710 | 1794 const char* objName, const char* targetKlassName, const char* desc) { |
0 | 1795 size_t msglen = strlen(objName) + strlen(desc) + strlen(targetKlassName) + 1; |
1796 | |
53 | 1797 char* message = NEW_RESOURCE_ARRAY(char, msglen); |
0 | 1798 if (NULL == message) { |
53 | 1799 // Shouldn't happen, but don't cause even more problems if it does |
0 | 1800 message = const_cast<char*>(objName); |
1801 } else { | |
1802 jio_snprintf(message, msglen, "%s%s%s", objName, desc, targetKlassName); | |
1803 } | |
1804 return message; | |
1805 } | |
1806 | |
1807 JRT_LEAF(void, SharedRuntime::reguard_yellow_pages()) | |
1808 (void) JavaThread::current()->reguard_stack(); | |
1809 JRT_END | |
1810 | |
1811 | |
1812 // Handles the uncommon case in locking, i.e., contention or an inflated lock. | |
1813 #ifndef PRODUCT | |
1814 int SharedRuntime::_monitor_enter_ctr=0; | |
1815 #endif | |
1816 JRT_ENTRY_NO_ASYNC(void, SharedRuntime::complete_monitor_locking_C(oopDesc* _obj, BasicLock* lock, JavaThread* thread)) | |
1817 oop obj(_obj); | |
1818 #ifndef PRODUCT | |
1819 _monitor_enter_ctr++; // monitor enter slow | |
1820 #endif | |
1821 if (PrintBiasedLockingStatistics) { | |
1822 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); | |
1823 } | |
1824 Handle h_obj(THREAD, obj); | |
1825 if (UseBiasedLocking) { | |
1826 // Retry fast entry if bias is revoked to avoid unnecessary inflation | |
1827 ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK); | |
1828 } else { | |
1829 ObjectSynchronizer::slow_enter(h_obj, lock, CHECK); | |
1830 } | |
1831 assert(!HAS_PENDING_EXCEPTION, "Should have no exception here"); | |
1832 JRT_END | |
1833 | |
1834 #ifndef PRODUCT | |
1835 int SharedRuntime::_monitor_exit_ctr=0; | |
1836 #endif | |
1837 // Handles the uncommon cases of monitor unlocking in compiled code | |
1838 JRT_LEAF(void, SharedRuntime::complete_monitor_unlocking_C(oopDesc* _obj, BasicLock* lock)) | |
1839 oop obj(_obj); | |
1840 #ifndef PRODUCT | |
1841 _monitor_exit_ctr++; // monitor exit slow | |
1842 #endif | |
1843 Thread* THREAD = JavaThread::current(); | |
1844 // I'm not convinced we need the code contained by MIGHT_HAVE_PENDING anymore | |
1845 // testing was unable to ever fire the assert that guarded it so I have removed it. | |
1846 assert(!HAS_PENDING_EXCEPTION, "Do we need code below anymore?"); | |
1847 #undef MIGHT_HAVE_PENDING | |
1848 #ifdef MIGHT_HAVE_PENDING | |
1849 // Save and restore any pending_exception around the exception mark. | |
1850 // While the slow_exit must not throw an exception, we could come into | |
1851 // this routine with one set. | |
1852 oop pending_excep = NULL; | |
1853 const char* pending_file; | |
1854 int pending_line; | |
1855 if (HAS_PENDING_EXCEPTION) { | |
1856 pending_excep = PENDING_EXCEPTION; | |
1857 pending_file = THREAD->exception_file(); | |
1858 pending_line = THREAD->exception_line(); | |
1859 CLEAR_PENDING_EXCEPTION; | |
1860 } | |
1861 #endif /* MIGHT_HAVE_PENDING */ | |
1862 | |
1863 { | |
1864 // Exit must be non-blocking, and therefore no exceptions can be thrown. | |
1865 EXCEPTION_MARK; | |
1866 ObjectSynchronizer::slow_exit(obj, lock, THREAD); | |
1867 } | |
1868 | |
1869 #ifdef MIGHT_HAVE_PENDING | |
1870 if (pending_excep != NULL) { | |
1871 THREAD->set_pending_exception(pending_excep, pending_file, pending_line); | |
1872 } | |
1873 #endif /* MIGHT_HAVE_PENDING */ | |
1874 JRT_END | |
1875 | |
1876 #ifndef PRODUCT | |
1877 | |
1878 void SharedRuntime::print_statistics() { | |
1879 ttyLocker ttyl; | |
1880 if (xtty != NULL) xtty->head("statistics type='SharedRuntime'"); | |
1881 | |
1882 if (_monitor_enter_ctr ) tty->print_cr("%5d monitor enter slow", _monitor_enter_ctr); | |
1883 if (_monitor_exit_ctr ) tty->print_cr("%5d monitor exit slow", _monitor_exit_ctr); | |
1884 if (_throw_null_ctr) tty->print_cr("%5d implicit null throw", _throw_null_ctr); | |
1885 | |
1886 SharedRuntime::print_ic_miss_histogram(); | |
1887 | |
1888 if (CountRemovableExceptions) { | |
1889 if (_nof_removable_exceptions > 0) { | |
1890 Unimplemented(); // this counter is not yet incremented | |
1891 tty->print_cr("Removable exceptions: %d", _nof_removable_exceptions); | |
1892 } | |
1893 } | |
1894 | |
1895 // Dump the JRT_ENTRY counters | |
1896 if( _new_instance_ctr ) tty->print_cr("%5d new instance requires GC", _new_instance_ctr); | |
1897 if( _new_array_ctr ) tty->print_cr("%5d new array requires GC", _new_array_ctr); | |
1898 if( _multi1_ctr ) tty->print_cr("%5d multianewarray 1 dim", _multi1_ctr); | |
1899 if( _multi2_ctr ) tty->print_cr("%5d multianewarray 2 dim", _multi2_ctr); | |
1900 if( _multi3_ctr ) tty->print_cr("%5d multianewarray 3 dim", _multi3_ctr); | |
1901 if( _multi4_ctr ) tty->print_cr("%5d multianewarray 4 dim", _multi4_ctr); | |
1902 if( _multi5_ctr ) tty->print_cr("%5d multianewarray 5 dim", _multi5_ctr); | |
1903 | |
1904 tty->print_cr("%5d inline cache miss in compiled", _ic_miss_ctr ); | |
1905 tty->print_cr("%5d wrong method", _wrong_method_ctr ); | |
1906 tty->print_cr("%5d unresolved static call site", _resolve_static_ctr ); | |
1907 tty->print_cr("%5d unresolved virtual call site", _resolve_virtual_ctr ); | |
1908 tty->print_cr("%5d unresolved opt virtual call site", _resolve_opt_virtual_ctr ); | |
1909 | |
1910 if( _mon_enter_stub_ctr ) tty->print_cr("%5d monitor enter stub", _mon_enter_stub_ctr ); | |
1911 if( _mon_exit_stub_ctr ) tty->print_cr("%5d monitor exit stub", _mon_exit_stub_ctr ); | |
1912 if( _mon_enter_ctr ) tty->print_cr("%5d monitor enter slow", _mon_enter_ctr ); | |
1913 if( _mon_exit_ctr ) tty->print_cr("%5d monitor exit slow", _mon_exit_ctr ); | |
1914 if( _partial_subtype_ctr) tty->print_cr("%5d slow partial subtype", _partial_subtype_ctr ); | |
1915 if( _jbyte_array_copy_ctr ) tty->print_cr("%5d byte array copies", _jbyte_array_copy_ctr ); | |
1916 if( _jshort_array_copy_ctr ) tty->print_cr("%5d short array copies", _jshort_array_copy_ctr ); | |
1917 if( _jint_array_copy_ctr ) tty->print_cr("%5d int array copies", _jint_array_copy_ctr ); | |
1918 if( _jlong_array_copy_ctr ) tty->print_cr("%5d long array copies", _jlong_array_copy_ctr ); | |
1919 if( _oop_array_copy_ctr ) tty->print_cr("%5d oop array copies", _oop_array_copy_ctr ); | |
1920 if( _checkcast_array_copy_ctr ) tty->print_cr("%5d checkcast array copies", _checkcast_array_copy_ctr ); | |
1921 if( _unsafe_array_copy_ctr ) tty->print_cr("%5d unsafe array copies", _unsafe_array_copy_ctr ); | |
1922 if( _generic_array_copy_ctr ) tty->print_cr("%5d generic array copies", _generic_array_copy_ctr ); | |
1923 if( _slow_array_copy_ctr ) tty->print_cr("%5d slow array copies", _slow_array_copy_ctr ); | |
1924 if( _find_handler_ctr ) tty->print_cr("%5d find exception handler", _find_handler_ctr ); | |
1925 if( _rethrow_ctr ) tty->print_cr("%5d rethrow handler", _rethrow_ctr ); | |
1926 | |
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1927 AdapterHandlerLibrary::print_statistics(); |
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1928 |
0 | 1929 if (xtty != NULL) xtty->tail("statistics"); |
1930 } | |
1931 | |
1932 inline double percent(int x, int y) { | |
1933 return 100.0 * x / MAX2(y, 1); | |
1934 } | |
1935 | |
1936 class MethodArityHistogram { | |
1937 public: | |
1938 enum { MAX_ARITY = 256 }; | |
1939 private: | |
1940 static int _arity_histogram[MAX_ARITY]; // histogram of #args | |
1941 static int _size_histogram[MAX_ARITY]; // histogram of arg size in words | |
1942 static int _max_arity; // max. arity seen | |
1943 static int _max_size; // max. arg size seen | |
1944 | |
1945 static void add_method_to_histogram(nmethod* nm) { | |
1946 methodOop m = nm->method(); | |
1947 ArgumentCount args(m->signature()); | |
1948 int arity = args.size() + (m->is_static() ? 0 : 1); | |
1949 int argsize = m->size_of_parameters(); | |
1950 arity = MIN2(arity, MAX_ARITY-1); | |
1951 argsize = MIN2(argsize, MAX_ARITY-1); | |
1952 int count = nm->method()->compiled_invocation_count(); | |
1953 _arity_histogram[arity] += count; | |
1954 _size_histogram[argsize] += count; | |
1955 _max_arity = MAX2(_max_arity, arity); | |
1956 _max_size = MAX2(_max_size, argsize); | |
1957 } | |
1958 | |
1959 void print_histogram_helper(int n, int* histo, const char* name) { | |
1960 const int N = MIN2(5, n); | |
1961 tty->print_cr("\nHistogram of call arity (incl. rcvr, calls to compiled methods only):"); | |
1962 double sum = 0; | |
1963 double weighted_sum = 0; | |
1964 int i; | |
1965 for (i = 0; i <= n; i++) { sum += histo[i]; weighted_sum += i*histo[i]; } | |
1966 double rest = sum; | |
1967 double percent = sum / 100; | |
1968 for (i = 0; i <= N; i++) { | |
1969 rest -= histo[i]; | |
1970 tty->print_cr("%4d: %7d (%5.1f%%)", i, histo[i], histo[i] / percent); | |
1971 } | |
1972 tty->print_cr("rest: %7d (%5.1f%%))", (int)rest, rest / percent); | |
1973 tty->print_cr("(avg. %s = %3.1f, max = %d)", name, weighted_sum / sum, n); | |
1974 } | |
1975 | |
1976 void print_histogram() { | |
1977 tty->print_cr("\nHistogram of call arity (incl. rcvr, calls to compiled methods only):"); | |
1978 print_histogram_helper(_max_arity, _arity_histogram, "arity"); | |
1979 tty->print_cr("\nSame for parameter size (in words):"); | |
1980 print_histogram_helper(_max_size, _size_histogram, "size"); | |
1981 tty->cr(); | |
1982 } | |
1983 | |
1984 public: | |
1985 MethodArityHistogram() { | |
1986 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
1987 _max_arity = _max_size = 0; | |
1988 for (int i = 0; i < MAX_ARITY; i++) _arity_histogram[i] = _size_histogram [i] = 0; | |
1989 CodeCache::nmethods_do(add_method_to_histogram); | |
1990 print_histogram(); | |
1991 } | |
1992 }; | |
1993 | |
1994 int MethodArityHistogram::_arity_histogram[MethodArityHistogram::MAX_ARITY]; | |
1995 int MethodArityHistogram::_size_histogram[MethodArityHistogram::MAX_ARITY]; | |
1996 int MethodArityHistogram::_max_arity; | |
1997 int MethodArityHistogram::_max_size; | |
1998 | |
1999 void SharedRuntime::print_call_statistics(int comp_total) { | |
2000 tty->print_cr("Calls from compiled code:"); | |
2001 int total = _nof_normal_calls + _nof_interface_calls + _nof_static_calls; | |
2002 int mono_c = _nof_normal_calls - _nof_optimized_calls - _nof_megamorphic_calls; | |
2003 int mono_i = _nof_interface_calls - _nof_optimized_interface_calls - _nof_megamorphic_interface_calls; | |
2004 tty->print_cr("\t%9d (%4.1f%%) total non-inlined ", total, percent(total, total)); | |
2005 tty->print_cr("\t%9d (%4.1f%%) virtual calls ", _nof_normal_calls, percent(_nof_normal_calls, total)); | |
2006 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_calls, percent(_nof_inlined_calls, _nof_normal_calls)); | |
2007 tty->print_cr("\t %9d (%3.0f%%) optimized ", _nof_optimized_calls, percent(_nof_optimized_calls, _nof_normal_calls)); | |
2008 tty->print_cr("\t %9d (%3.0f%%) monomorphic ", mono_c, percent(mono_c, _nof_normal_calls)); | |
2009 tty->print_cr("\t %9d (%3.0f%%) megamorphic ", _nof_megamorphic_calls, percent(_nof_megamorphic_calls, _nof_normal_calls)); | |
2010 tty->print_cr("\t%9d (%4.1f%%) interface calls ", _nof_interface_calls, percent(_nof_interface_calls, total)); | |
2011 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_interface_calls, percent(_nof_inlined_interface_calls, _nof_interface_calls)); | |
2012 tty->print_cr("\t %9d (%3.0f%%) optimized ", _nof_optimized_interface_calls, percent(_nof_optimized_interface_calls, _nof_interface_calls)); | |
2013 tty->print_cr("\t %9d (%3.0f%%) monomorphic ", mono_i, percent(mono_i, _nof_interface_calls)); | |
2014 tty->print_cr("\t %9d (%3.0f%%) megamorphic ", _nof_megamorphic_interface_calls, percent(_nof_megamorphic_interface_calls, _nof_interface_calls)); | |
2015 tty->print_cr("\t%9d (%4.1f%%) static/special calls", _nof_static_calls, percent(_nof_static_calls, total)); | |
2016 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_static_calls, percent(_nof_inlined_static_calls, _nof_static_calls)); | |
2017 tty->cr(); | |
2018 tty->print_cr("Note 1: counter updates are not MT-safe."); | |
2019 tty->print_cr("Note 2: %% in major categories are relative to total non-inlined calls;"); | |
2020 tty->print_cr(" %% in nested categories are relative to their category"); | |
2021 tty->print_cr(" (and thus add up to more than 100%% with inlining)"); | |
2022 tty->cr(); | |
2023 | |
2024 MethodArityHistogram h; | |
2025 } | |
2026 #endif | |
2027 | |
2028 | |
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2029 // A simple wrapper class around the calling convention information |
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2030 // that allows sharing of adapters for the same calling convention. |
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2031 class AdapterFingerPrint : public CHeapObj { |
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2032 private: |
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2033 union { |
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2034 int _compact[3]; |
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2035 int* _fingerprint; |
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2036 } _value; |
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2037 int _length; // A negative length indicates the fingerprint is in the compact form, |
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2038 // Otherwise _value._fingerprint is the array. |
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2039 |
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2040 // Remap BasicTypes that are handled equivalently by the adapters. |
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2041 // These are correct for the current system but someday it might be |
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2042 // necessary to make this mapping platform dependent. |
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2043 static BasicType adapter_encoding(BasicType in) { |
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2044 assert((~0xf & in) == 0, "must fit in 4 bits"); |
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2045 switch(in) { |
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2046 case T_BOOLEAN: |
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2047 case T_BYTE: |
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2048 case T_SHORT: |
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2049 case T_CHAR: |
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2050 // There are all promoted to T_INT in the calling convention |
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2051 return T_INT; |
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2052 |
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2053 case T_OBJECT: |
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2054 case T_ARRAY: |
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2055 #ifdef _LP64 |
1506 | 2056 return T_LONG; |
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2057 #else |
1506 | 2058 return T_INT; |
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2059 #endif |
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2060 |
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2061 case T_INT: |
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2062 case T_LONG: |
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2063 case T_FLOAT: |
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2064 case T_DOUBLE: |
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2065 case T_VOID: |
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2066 return in; |
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2067 |
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2068 default: |
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2069 ShouldNotReachHere(); |
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2070 return T_CONFLICT; |
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2071 } |
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2072 } |
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2073 |
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2074 public: |
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2075 AdapterFingerPrint(int total_args_passed, BasicType* sig_bt) { |
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2076 // The fingerprint is based on the BasicType signature encoded |
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2077 // into an array of ints with four entries per int. |
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2078 int* ptr; |
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2079 int len = (total_args_passed + 3) >> 2; |
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2080 if (len <= (int)(sizeof(_value._compact) / sizeof(int))) { |
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2081 _value._compact[0] = _value._compact[1] = _value._compact[2] = 0; |
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2082 // Storing the signature encoded as signed chars hits about 98% |
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2083 // of the time. |
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2084 _length = -len; |
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2085 ptr = _value._compact; |
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2086 } else { |
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2087 _length = len; |
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2088 _value._fingerprint = NEW_C_HEAP_ARRAY(int, _length); |
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2089 ptr = _value._fingerprint; |
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2090 } |
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2091 |
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2092 // Now pack the BasicTypes with 4 per int |
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2093 int sig_index = 0; |
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2094 for (int index = 0; index < len; index++) { |
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2095 int value = 0; |
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2096 for (int byte = 0; byte < 4; byte++) { |
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2097 if (sig_index < total_args_passed) { |
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2098 value = (value << 4) | adapter_encoding(sig_bt[sig_index++]); |
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2099 } |
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2100 } |
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2101 ptr[index] = value; |
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2102 } |
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2103 } |
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2104 |
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2105 ~AdapterFingerPrint() { |
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2106 if (_length > 0) { |
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2107 FREE_C_HEAP_ARRAY(int, _value._fingerprint); |
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2108 } |
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2109 } |
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2110 |
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2111 int value(int index) { |
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2112 if (_length < 0) { |
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2113 return _value._compact[index]; |
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2114 } |
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2115 return _value._fingerprint[index]; |
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2116 } |
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2117 int length() { |
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2118 if (_length < 0) return -_length; |
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2119 return _length; |
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2120 } |
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2121 |
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2122 bool is_compact() { |
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2123 return _length <= 0; |
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2124 } |
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2125 |
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2126 unsigned int compute_hash() { |
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2127 int hash = 0; |
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2128 for (int i = 0; i < length(); i++) { |
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2129 int v = value(i); |
1187
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2130 hash = (hash << 8) ^ v ^ (hash >> 5); |
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2131 } |
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2132 return (unsigned int)hash; |
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|
2133 } |
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2134 |
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|
2135 const char* as_string() { |
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|
2136 stringStream st; |
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2137 for (int i = 0; i < length(); i++) { |
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|
2138 st.print(PTR_FORMAT, value(i)); |
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|
2139 } |
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|
2140 return st.as_string(); |
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|
2141 } |
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|
2142 |
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2143 bool equals(AdapterFingerPrint* other) { |
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|
2144 if (other->_length != _length) { |
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diff
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|
2145 return false; |
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6911204: generated adapters with large signatures can fill up the code cache
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parents:
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diff
changeset
|
2146 } |
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diff
changeset
|
2147 if (_length < 0) { |
1207
74c848d437ab
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diff
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|
2148 return _value._compact[0] == other->_value._compact[0] && |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
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parents:
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diff
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|
2149 _value._compact[1] == other->_value._compact[1] && |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
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parents:
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diff
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|
2150 _value._compact[2] == other->_value._compact[2]; |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
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|
2151 } else { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
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|
2152 for (int i = 0; i < _length; i++) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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parents:
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|
2153 if (_value._fingerprint[i] != other->_value._fingerprint[i]) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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diff
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|
2154 return false; |
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6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2155 } |
cf0685d550f1
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parents:
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diff
changeset
|
2156 } |
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6911204: generated adapters with large signatures can fill up the code cache
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parents:
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diff
changeset
|
2157 } |
cf0685d550f1
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parents:
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diff
changeset
|
2158 return true; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2159 } |
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diff
changeset
|
2160 }; |
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6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2161 |
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6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2162 |
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6911204: generated adapters with large signatures can fill up the code cache
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|
2163 // A hashtable mapping from AdapterFingerPrints to AdapterHandlerEntries |
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6911204: generated adapters with large signatures can fill up the code cache
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|
2164 class AdapterHandlerTable : public BasicHashtable { |
cf0685d550f1
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|
2165 friend class AdapterHandlerTableIterator; |
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|
2166 |
cf0685d550f1
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|
2167 private: |
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diff
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|
2168 |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
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diff
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|
2169 #ifndef PRODUCT |
1187
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6911204: generated adapters with large signatures can fill up the code cache
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|
2170 static int _lookups; // number of calls to lookup |
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|
2171 static int _buckets; // number of buckets checked |
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6911204: generated adapters with large signatures can fill up the code cache
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|
2172 static int _equals; // number of buckets checked with matching hash |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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|
2173 static int _hits; // number of successful lookups |
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6911204: generated adapters with large signatures can fill up the code cache
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|
2174 static int _compact; // number of equals calls with compact signature |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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|
2175 #endif |
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6911204: generated adapters with large signatures can fill up the code cache
never
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diff
changeset
|
2176 |
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6911204: generated adapters with large signatures can fill up the code cache
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|
2177 AdapterHandlerEntry* bucket(int i) { |
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changeset
|
2178 return (AdapterHandlerEntry*)BasicHashtable::bucket(i); |
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6911204: generated adapters with large signatures can fill up the code cache
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|
2179 } |
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never
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diff
changeset
|
2180 |
cf0685d550f1
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diff
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|
2181 public: |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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diff
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|
2182 AdapterHandlerTable() |
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diff
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|
2183 : BasicHashtable(293, sizeof(AdapterHandlerEntry)) { } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2184 |
cf0685d550f1
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diff
changeset
|
2185 // Create a new entry suitable for insertion in the table |
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changeset
|
2186 AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) { |
cf0685d550f1
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|
2187 AdapterHandlerEntry* entry = (AdapterHandlerEntry*)BasicHashtable::new_entry(fingerprint->compute_hash()); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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|
2188 entry->init(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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diff
changeset
|
2189 return entry; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2190 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2191 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2192 // Insert an entry into the table |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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diff
changeset
|
2193 void add(AdapterHandlerEntry* entry) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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changeset
|
2194 int index = hash_to_index(entry->hash()); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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diff
changeset
|
2195 add_entry(index, entry); |
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6911204: generated adapters with large signatures can fill up the code cache
never
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diff
changeset
|
2196 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2197 |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
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1205
diff
changeset
|
2198 void free_entry(AdapterHandlerEntry* entry) { |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2199 entry->deallocate(); |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2200 BasicHashtable::free_entry(entry); |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2201 } |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2202 |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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changeset
|
2203 // Find a entry with the same fingerprint if it exists |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2204 AdapterHandlerEntry* lookup(int total_args_passed, BasicType* sig_bt) { |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
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1257
diff
changeset
|
2205 NOT_PRODUCT(_lookups++); |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2206 AdapterFingerPrint fp(total_args_passed, sig_bt); |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2207 unsigned int hash = fp.compute_hash(); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2208 int index = hash_to_index(hash); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2209 for (AdapterHandlerEntry* e = bucket(index); e != NULL; e = e->next()) { |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
diff
changeset
|
2210 NOT_PRODUCT(_buckets++); |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2211 if (e->hash() == hash) { |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
diff
changeset
|
2212 NOT_PRODUCT(_equals++); |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2213 if (fp.equals(e->fingerprint())) { |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
diff
changeset
|
2214 #ifndef PRODUCT |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2215 if (fp.is_compact()) _compact++; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2216 _hits++; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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diff
changeset
|
2217 #endif |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2218 return e; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2219 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2220 } |
cf0685d550f1
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never
parents:
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diff
changeset
|
2221 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2222 return NULL; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2223 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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diff
changeset
|
2224 |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
diff
changeset
|
2225 #ifndef PRODUCT |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2226 void print_statistics() { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2227 ResourceMark rm; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2228 int longest = 0; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2229 int empty = 0; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2230 int total = 0; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2231 int nonempty = 0; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2232 for (int index = 0; index < table_size(); index++) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2233 int count = 0; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2234 for (AdapterHandlerEntry* e = bucket(index); e != NULL; e = e->next()) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2235 count++; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2236 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2237 if (count != 0) nonempty++; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2238 if (count == 0) empty++; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2239 if (count > longest) longest = count; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2240 total += count; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2241 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2242 tty->print_cr("AdapterHandlerTable: empty %d longest %d total %d average %f", |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2243 empty, longest, total, total / (double)nonempty); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2244 tty->print_cr("AdapterHandlerTable: lookups %d buckets %d equals %d hits %d compact %d", |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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1142
diff
changeset
|
2245 _lookups, _buckets, _equals, _hits, _compact); |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
diff
changeset
|
2246 } |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2247 #endif |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2248 }; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2249 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2250 |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
diff
changeset
|
2251 #ifndef PRODUCT |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2252 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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diff
changeset
|
2253 int AdapterHandlerTable::_lookups; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2254 int AdapterHandlerTable::_buckets; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2255 int AdapterHandlerTable::_equals; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2256 int AdapterHandlerTable::_hits; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2257 int AdapterHandlerTable::_compact; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2258 |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1644
diff
changeset
|
2259 #endif |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1644
diff
changeset
|
2260 |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2261 class AdapterHandlerTableIterator : public StackObj { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2262 private: |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2263 AdapterHandlerTable* _table; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2264 int _index; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2265 AdapterHandlerEntry* _current; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2266 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2267 void scan() { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2268 while (_index < _table->table_size()) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2269 AdapterHandlerEntry* a = _table->bucket(_index); |
1564 | 2270 _index++; |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2271 if (a != NULL) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2272 _current = a; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2273 return; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2274 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2275 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2276 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2277 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2278 public: |
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2279 AdapterHandlerTableIterator(AdapterHandlerTable* table): _table(table), _index(0), _current(NULL) { |
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2280 scan(); |
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2281 } |
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2282 bool has_next() { |
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2283 return _current != NULL; |
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2284 } |
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2285 AdapterHandlerEntry* next() { |
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2286 if (_current != NULL) { |
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2287 AdapterHandlerEntry* result = _current; |
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2288 _current = _current->next(); |
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2289 if (_current == NULL) scan(); |
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2290 return result; |
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2291 } else { |
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2292 return NULL; |
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2293 } |
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2294 } |
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2295 }; |
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2296 |
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2297 |
0 | 2298 // --------------------------------------------------------------------------- |
2299 // Implementation of AdapterHandlerLibrary | |
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2300 AdapterHandlerTable* AdapterHandlerLibrary::_adapters = NULL; |
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2301 AdapterHandlerEntry* AdapterHandlerLibrary::_abstract_method_handler = NULL; |
0 | 2302 const int AdapterHandlerLibrary_size = 16*K; |
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2303 BufferBlob* AdapterHandlerLibrary::_buffer = NULL; |
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2304 |
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2305 BufferBlob* AdapterHandlerLibrary::buffer_blob() { |
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2306 // Should be called only when AdapterHandlerLibrary_lock is active. |
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2307 if (_buffer == NULL) // Initialize lazily |
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2308 _buffer = BufferBlob::create("adapters", AdapterHandlerLibrary_size); |
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2309 return _buffer; |
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2310 } |
0 | 2311 |
2312 void AdapterHandlerLibrary::initialize() { | |
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2313 if (_adapters != NULL) return; |
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2314 _adapters = new AdapterHandlerTable(); |
0 | 2315 |
2316 // Create a special handler for abstract methods. Abstract methods | |
2317 // are never compiled so an i2c entry is somewhat meaningless, but | |
2318 // fill it in with something appropriate just in case. Pass handle | |
2319 // wrong method for the c2i transitions. | |
2320 address wrong_method = SharedRuntime::get_handle_wrong_method_stub(); | |
1187
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2321 _abstract_method_handler = AdapterHandlerLibrary::new_entry(new AdapterFingerPrint(0, NULL), |
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2322 StubRoutines::throw_AbstractMethodError_entry(), |
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2323 wrong_method, wrong_method); |
0 | 2324 } |
2325 | |
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2326 AdapterHandlerEntry* AdapterHandlerLibrary::new_entry(AdapterFingerPrint* fingerprint, |
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2327 address i2c_entry, |
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2328 address c2i_entry, |
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2329 address c2i_unverified_entry) { |
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2330 return _adapters->new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
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2331 } |
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2332 |
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2333 AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(methodHandle method) { |
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2334 // Use customized signature handler. Need to lock around updates to |
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2335 // the AdapterHandlerTable (it is not safe for concurrent readers |
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2336 // and a single writer: this could be fixed if it becomes a |
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2337 // problem). |
0 | 2338 |
2339 // Get the address of the ic_miss handlers before we grab the | |
2340 // AdapterHandlerLibrary_lock. This fixes bug 6236259 which | |
2341 // was caused by the initialization of the stubs happening | |
2342 // while we held the lock and then notifying jvmti while | |
2343 // holding it. This just forces the initialization to be a little | |
2344 // earlier. | |
2345 address ic_miss = SharedRuntime::get_ic_miss_stub(); | |
2346 assert(ic_miss != NULL, "must have handler"); | |
2347 | |
1187
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2348 ResourceMark rm; |
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2349 |
1748 | 2350 NOT_PRODUCT(int insts_size); |
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2351 AdapterBlob* B = NULL; |
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2352 AdapterHandlerEntry* entry = NULL; |
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2353 AdapterFingerPrint* fingerprint = NULL; |
0 | 2354 { |
2355 MutexLocker mu(AdapterHandlerLibrary_lock); | |
2356 // make sure data structure is initialized | |
2357 initialize(); | |
2358 | |
2359 if (method->is_abstract()) { | |
1187
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2360 return _abstract_method_handler; |
0 | 2361 } |
2362 | |
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2363 // Fill in the signature array, for the calling-convention call. |
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2364 int total_args_passed = method->size_of_parameters(); // All args on stack |
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2365 |
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2366 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed); |
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2367 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed); |
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2368 int i = 0; |
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2369 if (!method->is_static()) // Pass in receiver first |
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2370 sig_bt[i++] = T_OBJECT; |
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2371 for (SignatureStream ss(method->signature()); !ss.at_return_type(); ss.next()) { |
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2372 sig_bt[i++] = ss.type(); // Collect remaining bits of signature |
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2373 if (ss.type() == T_LONG || ss.type() == T_DOUBLE) |
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2374 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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2375 } |
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2376 assert(i == total_args_passed, ""); |
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2377 |
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2378 // Lookup method signature's fingerprint |
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2379 entry = _adapters->lookup(total_args_passed, sig_bt); |
1187
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2380 |
1207
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2381 #ifdef ASSERT |
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2382 AdapterHandlerEntry* shared_entry = NULL; |
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2383 if (VerifyAdapterSharing && entry != NULL) { |
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2384 shared_entry = entry; |
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2385 entry = NULL; |
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2386 } |
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2387 #endif |
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2388 |
1187
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2389 if (entry != NULL) { |
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2390 return entry; |
0 | 2391 } |
2392 | |
1207
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2393 // Get a description of the compiled java calling convention and the largest used (VMReg) stack slot usage |
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2394 int comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed, false); |
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2395 |
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2396 // Make a C heap allocated version of the fingerprint to store in the adapter |
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2397 fingerprint = new AdapterFingerPrint(total_args_passed, sig_bt); |
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2398 |
0 | 2399 // Create I2C & C2I handlers |
2400 | |
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2401 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
742
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2402 if (buf != NULL) { |
1748 | 2403 CodeBuffer buffer(buf); |
742
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2404 short buffer_locs[20]; |
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2405 buffer.insts()->initialize_shared_locs((relocInfo*)buffer_locs, |
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2406 sizeof(buffer_locs)/sizeof(relocInfo)); |
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2407 MacroAssembler _masm(&buffer); |
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2408 |
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2409 entry = SharedRuntime::generate_i2c2i_adapters(&_masm, |
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2410 total_args_passed, |
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2411 comp_args_on_stack, |
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2412 sig_bt, |
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2413 regs, |
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2414 fingerprint); |
0 | 2415 |
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2416 #ifdef ASSERT |
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2417 if (VerifyAdapterSharing) { |
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2418 if (shared_entry != NULL) { |
1748 | 2419 assert(shared_entry->compare_code(buf->code_begin(), buffer.insts_size(), total_args_passed, sig_bt), |
1207
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2420 "code must match"); |
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2421 // Release the one just created and return the original |
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2422 _adapters->free_entry(entry); |
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2423 return shared_entry; |
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2424 } else { |
1748 | 2425 entry->save_code(buf->code_begin(), buffer.insts_size(), total_args_passed, sig_bt); |
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2426 } |
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2427 } |
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2428 #endif |
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2429 |
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2430 B = AdapterBlob::create(&buffer); |
1748 | 2431 NOT_PRODUCT(insts_size = buffer.insts_size()); |
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2432 } |
28 | 2433 if (B == NULL) { |
2434 // CodeCache is full, disable compilation | |
2435 // Ought to log this but compile log is only per compile thread | |
2436 // and we're some non descript Java thread. | |
1202 | 2437 MutexUnlocker mu(AdapterHandlerLibrary_lock); |
2438 CompileBroker::handle_full_code_cache(); | |
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2439 return NULL; // Out of CodeCache space |
28 | 2440 } |
1748 | 2441 entry->relocate(B->content_begin()); |
0 | 2442 #ifndef PRODUCT |
2443 // debugging suppport | |
2444 if (PrintAdapterHandlers) { | |
2445 tty->cr(); | |
1187
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2446 tty->print_cr("i2c argument handler #%d for: %s %s (fingerprint = %s, %d bytes generated)", |
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2447 _adapters->number_of_entries(), (method->is_static() ? "static" : "receiver"), |
1748 | 2448 method->signature()->as_C_string(), fingerprint->as_string(), insts_size ); |
0 | 2449 tty->print_cr("c2i argument handler starts at %p",entry->get_c2i_entry()); |
1748 | 2450 Disassembler::decode(entry->get_i2c_entry(), entry->get_i2c_entry() + insts_size); |
0 | 2451 } |
2452 #endif | |
2453 | |
1187
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1142
diff
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|
2454 _adapters->add(entry); |
0 | 2455 } |
2456 // Outside of the lock | |
2457 if (B != NULL) { | |
2458 char blob_id[256]; | |
2459 jio_snprintf(blob_id, | |
2460 sizeof(blob_id), | |
1187
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parents:
1142
diff
changeset
|
2461 "%s(%s)@" PTR_FORMAT, |
1299
9eba43136cb5
6934494: JSR 292 MethodHandles adapters should be generated into their own CodeBlob
twisti
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1295
diff
changeset
|
2462 B->name(), |
1187
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6911204: generated adapters with large signatures can fill up the code cache
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parents:
1142
diff
changeset
|
2463 fingerprint->as_string(), |
1748 | 2464 B->content_begin()); |
2465 Forte::register_stub(blob_id, B->content_begin(), B->content_end()); | |
0 | 2466 |
2467 if (JvmtiExport::should_post_dynamic_code_generated()) { | |
1748 | 2468 JvmtiExport::post_dynamic_code_generated(blob_id, B->content_begin(), B->content_end()); |
0 | 2469 } |
2470 } | |
1187
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|
2471 return entry; |
0 | 2472 } |
2473 | |
2474 void AdapterHandlerEntry::relocate(address new_base) { | |
2475 ptrdiff_t delta = new_base - _i2c_entry; | |
2476 _i2c_entry += delta; | |
2477 _c2i_entry += delta; | |
2478 _c2i_unverified_entry += delta; | |
2479 } | |
2480 | |
1207
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|
2481 |
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|
2482 void AdapterHandlerEntry::deallocate() { |
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changeset
|
2483 delete _fingerprint; |
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changeset
|
2484 #ifdef ASSERT |
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diff
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|
2485 if (_saved_code) FREE_C_HEAP_ARRAY(unsigned char, _saved_code); |
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|
2486 if (_saved_sig) FREE_C_HEAP_ARRAY(Basictype, _saved_sig); |
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1205
diff
changeset
|
2487 #endif |
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parents:
1205
diff
changeset
|
2488 } |
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6921922: fix for 6911204 breaks tagged stack interpreter
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diff
changeset
|
2489 |
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6921922: fix for 6911204 breaks tagged stack interpreter
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diff
changeset
|
2490 |
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6921922: fix for 6911204 breaks tagged stack interpreter
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diff
changeset
|
2491 #ifdef ASSERT |
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6921922: fix for 6911204 breaks tagged stack interpreter
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diff
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|
2492 // Capture the code before relocation so that it can be compared |
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6921922: fix for 6911204 breaks tagged stack interpreter
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parents:
1205
diff
changeset
|
2493 // against other versions. If the code is captured after relocation |
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6921922: fix for 6911204 breaks tagged stack interpreter
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diff
changeset
|
2494 // then relative instructions won't be equivalent. |
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diff
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|
2495 void AdapterHandlerEntry::save_code(unsigned char* buffer, int length, int total_args_passed, BasicType* sig_bt) { |
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|
2496 _saved_code = NEW_C_HEAP_ARRAY(unsigned char, length); |
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diff
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|
2497 _code_length = length; |
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parents:
1205
diff
changeset
|
2498 memcpy(_saved_code, buffer, length); |
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diff
changeset
|
2499 _total_args_passed = total_args_passed; |
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|
2500 _saved_sig = NEW_C_HEAP_ARRAY(BasicType, _total_args_passed); |
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|
2501 memcpy(_saved_sig, sig_bt, _total_args_passed * sizeof(BasicType)); |
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|
2502 } |
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|
2503 |
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|
2504 |
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|
2505 bool AdapterHandlerEntry::compare_code(unsigned char* buffer, int length, int total_args_passed, BasicType* sig_bt) { |
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parents:
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|
2506 if (length != _code_length) { |
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parents:
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diff
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|
2507 return false; |
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diff
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|
2508 } |
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diff
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|
2509 for (int i = 0; i < length; i++) { |
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|
2510 if (buffer[i] != _saved_code[i]) { |
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|
2511 return false; |
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diff
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|
2512 } |
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|
2513 } |
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|
2514 return true; |
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diff
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|
2515 } |
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diff
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|
2516 #endif |
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|
2517 |
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|
2518 |
0 | 2519 // Create a native wrapper for this native method. The wrapper converts the |
2520 // java compiled calling convention to the native convention, handlizes | |
2521 // arguments, and transitions to native. On return from the native we transition | |
2522 // back to java blocking if a safepoint is in progress. | |
2405
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7022998: JSR 292 recursive method handle calls inline themselves infinitely
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|
2523 nmethod *AdapterHandlerLibrary::create_native_wrapper(methodHandle method, int compile_id) { |
0 | 2524 ResourceMark rm; |
2525 nmethod* nm = NULL; | |
2526 | |
2527 assert(method->has_native_function(), "must have something valid to call!"); | |
2528 | |
2529 { | |
2530 // perform the work while holding the lock, but perform any printing outside the lock | |
2531 MutexLocker mu(AdapterHandlerLibrary_lock); | |
2532 // See if somebody beat us to it | |
2533 nm = method->code(); | |
2534 if (nm) { | |
2535 return nm; | |
2536 } | |
2537 | |
742
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
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710
diff
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|
2538 ResourceMark rm; |
0 | 2539 |
742
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
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diff
changeset
|
2540 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
kvn
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diff
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|
2541 if (buf != NULL) { |
1748 | 2542 CodeBuffer buffer(buf); |
742
45463a04ca27
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diff
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|
2543 double locs_buf[20]; |
45463a04ca27
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diff
changeset
|
2544 buffer.insts()->initialize_shared_locs((relocInfo*)locs_buf, sizeof(locs_buf) / sizeof(relocInfo)); |
45463a04ca27
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diff
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|
2545 MacroAssembler _masm(&buffer); |
45463a04ca27
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diff
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|
2546 |
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diff
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|
2547 // Fill in the signature array, for the calling-convention call. |
45463a04ca27
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710
diff
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|
2548 int total_args_passed = method->size_of_parameters(); |
0 | 2549 |
742
45463a04ca27
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diff
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|
2550 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType,total_args_passed); |
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diff
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|
2551 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair,total_args_passed); |
45463a04ca27
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diff
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|
2552 int i=0; |
45463a04ca27
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710
diff
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|
2553 if( !method->is_static() ) // Pass in receiver first |
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
kvn
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diff
changeset
|
2554 sig_bt[i++] = T_OBJECT; |
45463a04ca27
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710
diff
changeset
|
2555 SignatureStream ss(method->signature()); |
45463a04ca27
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diff
changeset
|
2556 for( ; !ss.at_return_type(); ss.next()) { |
45463a04ca27
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710
diff
changeset
|
2557 sig_bt[i++] = ss.type(); // Collect remaining bits of signature |
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kvn
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710
diff
changeset
|
2558 if( ss.type() == T_LONG || ss.type() == T_DOUBLE ) |
45463a04ca27
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710
diff
changeset
|
2559 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
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diff
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|
2560 } |
45463a04ca27
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diff
changeset
|
2561 assert( i==total_args_passed, "" ); |
45463a04ca27
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kvn
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diff
changeset
|
2562 BasicType ret_type = ss.type(); |
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diff
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|
2563 |
45463a04ca27
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diff
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|
2564 // Now get the compiled-Java layout as input arguments |
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diff
changeset
|
2565 int comp_args_on_stack; |
45463a04ca27
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diff
changeset
|
2566 comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed, false); |
45463a04ca27
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diff
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|
2567 |
45463a04ca27
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diff
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|
2568 // Generate the compiled-to-native wrapper code |
45463a04ca27
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710
diff
changeset
|
2569 nm = SharedRuntime::generate_native_wrapper(&_masm, |
45463a04ca27
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diff
changeset
|
2570 method, |
2405
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
twisti
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2321
diff
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|
2571 compile_id, |
742
45463a04ca27
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diff
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|
2572 total_args_passed, |
45463a04ca27
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710
diff
changeset
|
2573 comp_args_on_stack, |
45463a04ca27
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710
diff
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|
2574 sig_bt,regs, |
45463a04ca27
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|
2575 ret_type); |
0 | 2576 } |
2577 } | |
2578 | |
2579 // Must unlock before calling set_code | |
1728
a62d332029cf
6976372: # assert(_owner == Thread::current()) failed: invariant
never
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1681
diff
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|
2580 |
0 | 2581 // Install the generated code. |
2582 if (nm != NULL) { | |
2405
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
twisti
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2321
diff
changeset
|
2583 if (PrintCompilation) { |
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
twisti
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2321
diff
changeset
|
2584 ttyLocker ttyl; |
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
twisti
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2321
diff
changeset
|
2585 CompileTask::print_compilation(tty, nm, method->is_static() ? "(static)" : ""); |
3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
twisti
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2321
diff
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|
2586 } |
0 | 2587 method->set_code(method, nm); |
2588 nm->post_compiled_method_load_event(); | |
2589 } else { | |
2590 // CodeCache is full, disable compilation | |
1202 | 2591 CompileBroker::handle_full_code_cache(); |
0 | 2592 } |
2593 return nm; | |
2594 } | |
2595 | |
116
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diff
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|
2596 #ifdef HAVE_DTRACE_H |
018d5b58dd4f
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diff
changeset
|
2597 // Create a dtrace nmethod for this method. The wrapper converts the |
018d5b58dd4f
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diff
changeset
|
2598 // java compiled calling convention to the native convention, makes a dummy call |
018d5b58dd4f
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diff
changeset
|
2599 // (actually nops for the size of the call instruction, which become a trap if |
018d5b58dd4f
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diff
changeset
|
2600 // probe is enabled). The returns to the caller. Since this all looks like a |
018d5b58dd4f
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diff
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|
2601 // leaf no thread transition is needed. |
018d5b58dd4f
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diff
changeset
|
2602 |
018d5b58dd4f
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diff
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|
2603 nmethod *AdapterHandlerLibrary::create_dtrace_nmethod(methodHandle method) { |
018d5b58dd4f
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kamg
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diff
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|
2604 ResourceMark rm; |
018d5b58dd4f
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diff
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|
2605 nmethod* nm = NULL; |
018d5b58dd4f
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diff
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|
2606 |
018d5b58dd4f
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|
2607 if (PrintCompilation) { |
018d5b58dd4f
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diff
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|
2608 ttyLocker ttyl; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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diff
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|
2609 tty->print("--- n%s "); |
018d5b58dd4f
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diff
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|
2610 method->print_short_name(tty); |
018d5b58dd4f
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diff
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|
2611 if (method->is_static()) { |
018d5b58dd4f
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diff
changeset
|
2612 tty->print(" (static)"); |
018d5b58dd4f
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diff
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|
2613 } |
018d5b58dd4f
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62
diff
changeset
|
2614 tty->cr(); |
018d5b58dd4f
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diff
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|
2615 } |
018d5b58dd4f
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diff
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|
2616 |
018d5b58dd4f
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diff
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|
2617 { |
018d5b58dd4f
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diff
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|
2618 // perform the work while holding the lock, but perform any printing |
018d5b58dd4f
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diff
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|
2619 // outside the lock |
018d5b58dd4f
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62
diff
changeset
|
2620 MutexLocker mu(AdapterHandlerLibrary_lock); |
018d5b58dd4f
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diff
changeset
|
2621 // See if somebody beat us to it |
018d5b58dd4f
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diff
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|
2622 nm = method->code(); |
018d5b58dd4f
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diff
changeset
|
2623 if (nm) { |
018d5b58dd4f
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62
diff
changeset
|
2624 return nm; |
018d5b58dd4f
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diff
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|
2625 } |
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2626 |
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2627 ResourceMark rm; |
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2628 |
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2629 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
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2630 if (buf != NULL) { |
1748 | 2631 CodeBuffer buffer(buf); |
742
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2632 // Need a few relocation entries |
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2633 double locs_buf[20]; |
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2634 buffer.insts()->initialize_shared_locs( |
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2635 (relocInfo*)locs_buf, sizeof(locs_buf) / sizeof(relocInfo)); |
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2636 MacroAssembler _masm(&buffer); |
116
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2637 |
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2638 // Generate the compiled-to-native wrapper code |
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2639 nm = SharedRuntime::generate_dtrace_nmethod(&_masm, method); |
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2640 } |
116
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2641 } |
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2642 return nm; |
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2643 } |
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2644 |
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2645 // the dtrace method needs to convert java lang string to utf8 string. |
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2646 void SharedRuntime::get_utf(oopDesc* src, address dst) { |
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2647 typeArrayOop jlsValue = java_lang_String::value(src); |
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2648 int jlsOffset = java_lang_String::offset(src); |
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2649 int jlsLen = java_lang_String::length(src); |
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2650 jchar* jlsPos = (jlsLen == 0) ? NULL : |
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2651 jlsValue->char_at_addr(jlsOffset); |
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2652 assert(typeArrayKlass::cast(jlsValue->klass())->element_type() == T_CHAR, "compressed string"); |
116
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2653 (void) UNICODE::as_utf8(jlsPos, jlsLen, (char *)dst, max_dtrace_string_size); |
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2654 } |
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2655 #endif // ndef HAVE_DTRACE_H |
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2656 |
0 | 2657 // ------------------------------------------------------------------------- |
2658 // Java-Java calling convention | |
2659 // (what you use when Java calls Java) | |
2660 | |
2661 //------------------------------name_for_receiver---------------------------------- | |
2662 // For a given signature, return the VMReg for parameter 0. | |
2663 VMReg SharedRuntime::name_for_receiver() { | |
2664 VMRegPair regs; | |
2665 BasicType sig_bt = T_OBJECT; | |
2666 (void) java_calling_convention(&sig_bt, ®s, 1, true); | |
2667 // Return argument 0 register. In the LP64 build pointers | |
2668 // take 2 registers, but the VM wants only the 'main' name. | |
2669 return regs.first(); | |
2670 } | |
2671 | |
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2672 VMRegPair *SharedRuntime::find_callee_arguments(Symbol* sig, bool has_receiver, int* arg_size) { |
0 | 2673 // This method is returning a data structure allocating as a |
2674 // ResourceObject, so do not put any ResourceMarks in here. | |
2675 char *s = sig->as_C_string(); | |
2676 int len = (int)strlen(s); | |
2677 *s++; len--; // Skip opening paren | |
2678 char *t = s+len; | |
2679 while( *(--t) != ')' ) ; // Find close paren | |
2680 | |
2681 BasicType *sig_bt = NEW_RESOURCE_ARRAY( BasicType, 256 ); | |
2682 VMRegPair *regs = NEW_RESOURCE_ARRAY( VMRegPair, 256 ); | |
2683 int cnt = 0; | |
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2684 if (has_receiver) { |
0 | 2685 sig_bt[cnt++] = T_OBJECT; // Receiver is argument 0; not in signature |
2686 } | |
2687 | |
2688 while( s < t ) { | |
2689 switch( *s++ ) { // Switch on signature character | |
2690 case 'B': sig_bt[cnt++] = T_BYTE; break; | |
2691 case 'C': sig_bt[cnt++] = T_CHAR; break; | |
2692 case 'D': sig_bt[cnt++] = T_DOUBLE; sig_bt[cnt++] = T_VOID; break; | |
2693 case 'F': sig_bt[cnt++] = T_FLOAT; break; | |
2694 case 'I': sig_bt[cnt++] = T_INT; break; | |
2695 case 'J': sig_bt[cnt++] = T_LONG; sig_bt[cnt++] = T_VOID; break; | |
2696 case 'S': sig_bt[cnt++] = T_SHORT; break; | |
2697 case 'Z': sig_bt[cnt++] = T_BOOLEAN; break; | |
2698 case 'V': sig_bt[cnt++] = T_VOID; break; | |
2699 case 'L': // Oop | |
2700 while( *s++ != ';' ) ; // Skip signature | |
2701 sig_bt[cnt++] = T_OBJECT; | |
2702 break; | |
2703 case '[': { // Array | |
2704 do { // Skip optional size | |
2705 while( *s >= '0' && *s <= '9' ) s++; | |
2706 } while( *s++ == '[' ); // Nested arrays? | |
2707 // Skip element type | |
2708 if( s[-1] == 'L' ) | |
2709 while( *s++ != ';' ) ; // Skip signature | |
2710 sig_bt[cnt++] = T_ARRAY; | |
2711 break; | |
2712 } | |
2713 default : ShouldNotReachHere(); | |
2714 } | |
2715 } | |
2716 assert( cnt < 256, "grow table size" ); | |
2717 | |
2718 int comp_args_on_stack; | |
2719 comp_args_on_stack = java_calling_convention(sig_bt, regs, cnt, true); | |
2720 | |
2721 // the calling convention doesn't count out_preserve_stack_slots so | |
2722 // we must add that in to get "true" stack offsets. | |
2723 | |
2724 if (comp_args_on_stack) { | |
2725 for (int i = 0; i < cnt; i++) { | |
2726 VMReg reg1 = regs[i].first(); | |
2727 if( reg1->is_stack()) { | |
2728 // Yuck | |
2729 reg1 = reg1->bias(out_preserve_stack_slots()); | |
2730 } | |
2731 VMReg reg2 = regs[i].second(); | |
2732 if( reg2->is_stack()) { | |
2733 // Yuck | |
2734 reg2 = reg2->bias(out_preserve_stack_slots()); | |
2735 } | |
2736 regs[i].set_pair(reg2, reg1); | |
2737 } | |
2738 } | |
2739 | |
2740 // results | |
2741 *arg_size = cnt; | |
2742 return regs; | |
2743 } | |
2744 | |
2745 // OSR Migration Code | |
2746 // | |
2747 // This code is used convert interpreter frames into compiled frames. It is | |
2748 // called from very start of a compiled OSR nmethod. A temp array is | |
2749 // allocated to hold the interesting bits of the interpreter frame. All | |
2750 // active locks are inflated to allow them to move. The displaced headers and | |
2751 // active interpeter locals are copied into the temp buffer. Then we return | |
2752 // back to the compiled code. The compiled code then pops the current | |
2753 // interpreter frame off the stack and pushes a new compiled frame. Then it | |
2754 // copies the interpreter locals and displaced headers where it wants. | |
2755 // Finally it calls back to free the temp buffer. | |
2756 // | |
2757 // All of this is done NOT at any Safepoint, nor is any safepoint or GC allowed. | |
2758 | |
2759 JRT_LEAF(intptr_t*, SharedRuntime::OSR_migration_begin( JavaThread *thread) ) | |
2760 | |
2761 #ifdef IA64 | |
2762 ShouldNotReachHere(); // NYI | |
2763 #endif /* IA64 */ | |
2764 | |
2765 // | |
2766 // This code is dependent on the memory layout of the interpreter local | |
2767 // array and the monitors. On all of our platforms the layout is identical | |
2768 // so this code is shared. If some platform lays the their arrays out | |
2769 // differently then this code could move to platform specific code or | |
2770 // the code here could be modified to copy items one at a time using | |
2771 // frame accessor methods and be platform independent. | |
2772 | |
2773 frame fr = thread->last_frame(); | |
2774 assert( fr.is_interpreted_frame(), "" ); | |
2775 assert( fr.interpreter_frame_expression_stack_size()==0, "only handle empty stacks" ); | |
2776 | |
2777 // Figure out how many monitors are active. | |
2778 int active_monitor_count = 0; | |
2779 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); | |
2780 kptr < fr.interpreter_frame_monitor_begin(); | |
2781 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { | |
2782 if( kptr->obj() != NULL ) active_monitor_count++; | |
2783 } | |
2784 | |
2785 // QQQ we could place number of active monitors in the array so that compiled code | |
2786 // could double check it. | |
2787 | |
2788 methodOop moop = fr.interpreter_frame_method(); | |
2789 int max_locals = moop->max_locals(); | |
2790 // Allocate temp buffer, 1 word per local & 2 per active monitor | |
2791 int buf_size_words = max_locals + active_monitor_count*2; | |
2792 intptr_t *buf = NEW_C_HEAP_ARRAY(intptr_t,buf_size_words); | |
2793 | |
2794 // Copy the locals. Order is preserved so that loading of longs works. | |
2795 // Since there's no GC I can copy the oops blindly. | |
2796 assert( sizeof(HeapWord)==sizeof(intptr_t), "fix this code"); | |
1506 | 2797 Copy::disjoint_words((HeapWord*)fr.interpreter_frame_local_at(max_locals-1), |
0 | 2798 (HeapWord*)&buf[0], |
2799 max_locals); | |
2800 | |
2801 // Inflate locks. Copy the displaced headers. Be careful, there can be holes. | |
2802 int i = max_locals; | |
2803 for( BasicObjectLock *kptr2 = fr.interpreter_frame_monitor_end(); | |
2804 kptr2 < fr.interpreter_frame_monitor_begin(); | |
2805 kptr2 = fr.next_monitor_in_interpreter_frame(kptr2) ) { | |
2806 if( kptr2->obj() != NULL) { // Avoid 'holes' in the monitor array | |
2807 BasicLock *lock = kptr2->lock(); | |
2808 // Inflate so the displaced header becomes position-independent | |
2809 if (lock->displaced_header()->is_unlocked()) | |
2810 ObjectSynchronizer::inflate_helper(kptr2->obj()); | |
2811 // Now the displaced header is free to move | |
2812 buf[i++] = (intptr_t)lock->displaced_header(); | |
2813 buf[i++] = (intptr_t)kptr2->obj(); | |
2814 } | |
2815 } | |
2816 assert( i - max_locals == active_monitor_count*2, "found the expected number of monitors" ); | |
2817 | |
2818 return buf; | |
2819 JRT_END | |
2820 | |
2821 JRT_LEAF(void, SharedRuntime::OSR_migration_end( intptr_t* buf) ) | |
2822 FREE_C_HEAP_ARRAY(intptr_t,buf); | |
2823 JRT_END | |
2824 | |
2825 bool AdapterHandlerLibrary::contains(CodeBlob* b) { | |
1187
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2826 AdapterHandlerTableIterator iter(_adapters); |
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2827 while (iter.has_next()) { |
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2828 AdapterHandlerEntry* a = iter.next(); |
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2829 if ( b == CodeCache::find_blob(a->get_i2c_entry()) ) return true; |
0 | 2830 } |
2831 return false; | |
2832 } | |
2833 | |
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2834 void AdapterHandlerLibrary::print_handler_on(outputStream* st, CodeBlob* b) { |
1187
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2835 AdapterHandlerTableIterator iter(_adapters); |
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2836 while (iter.has_next()) { |
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2837 AdapterHandlerEntry* a = iter.next(); |
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2838 if ( b == CodeCache::find_blob(a->get_i2c_entry()) ) { |
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2839 st->print("Adapter for signature: "); |
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2840 st->print_cr("%s i2c: " INTPTR_FORMAT " c2i: " INTPTR_FORMAT " c2iUV: " INTPTR_FORMAT, |
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2841 a->fingerprint()->as_string(), |
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2842 a->get_i2c_entry(), a->get_c2i_entry(), a->get_c2i_unverified_entry()); |
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2843 |
0 | 2844 return; |
2845 } | |
2846 } | |
2847 assert(false, "Should have found handler"); | |
2848 } | |
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2849 |
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2850 #ifndef PRODUCT |
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2851 |
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2852 void AdapterHandlerLibrary::print_statistics() { |
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2853 _adapters->print_statistics(); |
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|
2854 } |
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2855 |
0 | 2856 #endif /* PRODUCT */ |