Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/sharedRuntime.cpp @ 2211:0cd39a385a72
Merge.
author | Thomas Wuerthinger <thomas.wuerthinger@gmail.com> |
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date | Mon, 21 Feb 2011 19:17:33 +0100 |
parents | d25d4ca69222 b92c45f2bc75 |
children | 0654ee04b214 |
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 | |
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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) |
1681
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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) { |
0 | 434 assert(frame::verify_return_pc(return_address), "must be a return pc"); |
435 | |
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436 // Reset MethodHandle flag. |
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437 thread->set_is_method_handle_return(false); |
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438 |
0 | 439 // the fastest case first |
440 CodeBlob* blob = CodeCache::find_blob(return_address); | |
441 if (blob != NULL && blob->is_nmethod()) { | |
442 nmethod* code = (nmethod*)blob; | |
443 assert(code != NULL, "nmethod must be present"); | |
1295 | 444 // Check if the return address is a MethodHandle call site. |
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445 thread->set_is_method_handle_return(code->is_method_handle_return(return_address)); |
0 | 446 // native nmethods don't have exception handlers |
447 assert(!code->is_native_method(), "no exception handler"); | |
448 assert(code->header_begin() != code->exception_begin(), "no exception handler"); | |
449 if (code->is_deopt_pc(return_address)) { | |
450 return SharedRuntime::deopt_blob()->unpack_with_exception(); | |
451 } else { | |
452 return code->exception_begin(); | |
453 } | |
454 } | |
455 | |
456 // Entry code | |
457 if (StubRoutines::returns_to_call_stub(return_address)) { | |
458 return StubRoutines::catch_exception_entry(); | |
459 } | |
460 // Interpreted code | |
461 if (Interpreter::contains(return_address)) { | |
462 return Interpreter::rethrow_exception_entry(); | |
463 } | |
464 | |
465 // Compiled code | |
466 if (CodeCache::contains(return_address)) { | |
467 CodeBlob* blob = CodeCache::find_blob(return_address); | |
468 if (blob->is_nmethod()) { | |
469 nmethod* code = (nmethod*)blob; | |
470 assert(code != NULL, "nmethod must be present"); | |
1295 | 471 // Check if the return address is a MethodHandle call site. |
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472 thread->set_is_method_handle_return(code->is_method_handle_return(return_address)); |
0 | 473 assert(code->header_begin() != code->exception_begin(), "no exception handler"); |
474 return code->exception_begin(); | |
475 } | |
476 if (blob->is_runtime_stub()) { | |
477 ShouldNotReachHere(); // callers are responsible for skipping runtime stub frames | |
478 } | |
479 } | |
480 guarantee(!VtableStubs::contains(return_address), "NULL exceptions in vtables should have been handled already!"); | |
481 #ifndef PRODUCT | |
482 { ResourceMark rm; | |
483 tty->print_cr("No exception handler found for exception at " INTPTR_FORMAT " - potential problems:", return_address); | |
484 tty->print_cr("a) exception happened in (new?) code stubs/buffers that is not handled here"); | |
485 tty->print_cr("b) other problem"); | |
486 } | |
487 #endif // PRODUCT | |
488 ShouldNotReachHere(); | |
489 return NULL; | |
490 } | |
491 | |
492 | |
1295 | 493 JRT_LEAF(address, SharedRuntime::exception_handler_for_return_address(JavaThread* thread, address return_address)) |
494 return raw_exception_handler_for_return_address(thread, return_address); | |
0 | 495 JRT_END |
496 | |
1295 | 497 |
0 | 498 address SharedRuntime::get_poll_stub(address pc) { |
499 address stub; | |
500 // Look up the code blob | |
501 CodeBlob *cb = CodeCache::find_blob(pc); | |
502 | |
503 // Should be an nmethod | |
504 assert( cb && cb->is_nmethod(), "safepoint polling: pc must refer to an nmethod" ); | |
505 | |
506 // Look up the relocation information | |
507 assert( ((nmethod*)cb)->is_at_poll_or_poll_return(pc), | |
508 "safepoint polling: type must be poll" ); | |
509 | |
510 assert( ((NativeInstruction*)pc)->is_safepoint_poll(), | |
511 "Only polling locations are used for safepoint"); | |
512 | |
513 bool at_poll_return = ((nmethod*)cb)->is_at_poll_return(pc); | |
514 if (at_poll_return) { | |
515 assert(SharedRuntime::polling_page_return_handler_blob() != NULL, | |
516 "polling page return stub not created yet"); | |
1748 | 517 stub = SharedRuntime::polling_page_return_handler_blob()->entry_point(); |
0 | 518 } else { |
519 assert(SharedRuntime::polling_page_safepoint_handler_blob() != NULL, | |
520 "polling page safepoint stub not created yet"); | |
1748 | 521 stub = SharedRuntime::polling_page_safepoint_handler_blob()->entry_point(); |
0 | 522 } |
523 #ifndef PRODUCT | |
524 if( TraceSafepoint ) { | |
525 char buf[256]; | |
526 jio_snprintf(buf, sizeof(buf), | |
527 "... found polling page %s exception at pc = " | |
528 INTPTR_FORMAT ", stub =" INTPTR_FORMAT, | |
529 at_poll_return ? "return" : "loop", | |
530 (intptr_t)pc, (intptr_t)stub); | |
531 tty->print_raw_cr(buf); | |
532 } | |
533 #endif // PRODUCT | |
534 return stub; | |
535 } | |
536 | |
537 | |
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538 oop SharedRuntime::retrieve_receiver( Symbol* sig, frame caller ) { |
0 | 539 assert(caller.is_interpreted_frame(), ""); |
540 int args_size = ArgumentSizeComputer(sig).size() + 1; | |
541 assert(args_size <= caller.interpreter_frame_expression_stack_size(), "receiver must be on interpreter stack"); | |
542 oop result = (oop) *caller.interpreter_frame_tos_at(args_size - 1); | |
543 assert(Universe::heap()->is_in(result) && result->is_oop(), "receiver must be an oop"); | |
544 return result; | |
545 } | |
546 | |
547 | |
548 void SharedRuntime::throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception) { | |
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549 if (JvmtiExport::can_post_on_exceptions()) { |
0 | 550 vframeStream vfst(thread, true); |
551 methodHandle method = methodHandle(thread, vfst.method()); | |
552 address bcp = method()->bcp_from(vfst.bci()); | |
553 JvmtiExport::post_exception_throw(thread, method(), bcp, h_exception()); | |
554 } | |
555 Exceptions::_throw(thread, __FILE__, __LINE__, h_exception); | |
556 } | |
557 | |
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558 void SharedRuntime::throw_and_post_jvmti_exception(JavaThread *thread, Symbol* name, const char *message) { |
0 | 559 Handle h_exception = Exceptions::new_exception(thread, name, message); |
560 throw_and_post_jvmti_exception(thread, h_exception); | |
561 } | |
562 | |
610
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563 // The interpreter code to call this tracing function is only |
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564 // called/generated when TraceRedefineClasses has the right bits |
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565 // set. Since obsolete methods are never compiled, we don't have |
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566 // to modify the compilers to generate calls to this function. |
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567 // |
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568 JRT_LEAF(int, SharedRuntime::rc_trace_method_entry( |
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569 JavaThread* thread, methodOopDesc* method)) |
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570 assert(RC_TRACE_IN_RANGE(0x00001000, 0x00002000), "wrong call"); |
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571 |
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572 if (method->is_obsolete()) { |
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573 // We are calling an obsolete method, but this is not necessarily |
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574 // an error. Our method could have been redefined just after we |
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575 // fetched the methodOop from the constant pool. |
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576 |
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577 // RC_TRACE macro has an embedded ResourceMark |
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578 RC_TRACE_WITH_THREAD(0x00001000, thread, |
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579 ("calling obsolete method '%s'", |
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580 method->name_and_sig_as_C_string())); |
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581 if (RC_TRACE_ENABLED(0x00002000)) { |
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582 // this option is provided to debug calls to obsolete methods |
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583 guarantee(false, "faulting at call to an obsolete method."); |
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584 } |
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585 } |
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586 return 0; |
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587 JRT_END |
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588 |
0 | 589 // ret_pc points into caller; we are returning caller's exception handler |
590 // for given exception | |
591 address SharedRuntime::compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception, | |
592 bool force_unwind, bool top_frame_only) { | |
593 assert(nm != NULL, "must exist"); | |
594 ResourceMark rm; | |
595 | |
596 ScopeDesc* sd = nm->scope_desc_at(ret_pc); | |
597 // determine handler bci, if any | |
598 EXCEPTION_MARK; | |
599 | |
600 int handler_bci = -1; | |
601 int scope_depth = 0; | |
602 if (!force_unwind) { | |
603 int bci = sd->bci(); | |
604 do { | |
605 bool skip_scope_increment = false; | |
606 // exception handler lookup | |
607 KlassHandle ek (THREAD, exception->klass()); | |
608 handler_bci = sd->method()->fast_exception_handler_bci_for(ek, bci, THREAD); | |
609 if (HAS_PENDING_EXCEPTION) { | |
610 // We threw an exception while trying to find the exception handler. | |
611 // Transfer the new exception to the exception handle which will | |
612 // be set into thread local storage, and do another lookup for an | |
613 // exception handler for this exception, this time starting at the | |
614 // BCI of the exception handler which caused the exception to be | |
615 // thrown (bugs 4307310 and 4546590). Set "exception" reference | |
616 // argument to ensure that the correct exception is thrown (4870175). | |
617 exception = Handle(THREAD, PENDING_EXCEPTION); | |
618 CLEAR_PENDING_EXCEPTION; | |
619 if (handler_bci >= 0) { | |
620 bci = handler_bci; | |
621 handler_bci = -1; | |
622 skip_scope_increment = true; | |
623 } | |
624 } | |
625 if (!top_frame_only && handler_bci < 0 && !skip_scope_increment) { | |
626 sd = sd->sender(); | |
627 if (sd != NULL) { | |
628 bci = sd->bci(); | |
629 } | |
630 ++scope_depth; | |
631 } | |
632 } while (!top_frame_only && handler_bci < 0 && sd != NULL); | |
633 } | |
634 | |
635 // found handling method => lookup exception handler | |
1748 | 636 int catch_pco = ret_pc - nm->code_begin(); |
0 | 637 |
638 ExceptionHandlerTable table(nm); | |
639 HandlerTableEntry *t = table.entry_for(catch_pco, handler_bci, scope_depth); | |
640 if (t == NULL && (nm->is_compiled_by_c1() || handler_bci != -1)) { | |
641 // Allow abbreviated catch tables. The idea is to allow a method | |
642 // to materialize its exceptions without committing to the exact | |
643 // routing of exceptions. In particular this is needed for adding | |
644 // a synthethic handler to unlock monitors when inlining | |
645 // synchonized methods since the unlock path isn't represented in | |
646 // the bytecodes. | |
647 t = table.entry_for(catch_pco, -1, 0); | |
648 } | |
649 | |
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650 #ifdef COMPILER1 |
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651 if (t == NULL && nm->is_compiled_by_c1()) { |
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652 assert(nm->unwind_handler_begin() != NULL, ""); |
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653 return nm->unwind_handler_begin(); |
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654 } |
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655 #endif |
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656 |
0 | 657 if (t == NULL) { |
658 tty->print_cr("MISSING EXCEPTION HANDLER for pc " INTPTR_FORMAT " and handler bci %d", ret_pc, handler_bci); | |
659 tty->print_cr(" Exception:"); | |
660 exception->print(); | |
661 tty->cr(); | |
662 tty->print_cr(" Compiled exception table :"); | |
663 table.print(); | |
664 nm->print_code(); | |
665 guarantee(false, "missing exception handler"); | |
666 return NULL; | |
667 } | |
668 | |
1748 | 669 return nm->code_begin() + t->pco(); |
0 | 670 } |
671 | |
672 JRT_ENTRY(void, SharedRuntime::throw_AbstractMethodError(JavaThread* thread)) | |
673 // These errors occur only at call sites | |
674 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_AbstractMethodError()); | |
675 JRT_END | |
676 | |
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677 JRT_ENTRY(void, SharedRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) |
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678 // These errors occur only at call sites |
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679 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_IncompatibleClassChangeError(), "vtable stub"); |
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680 JRT_END |
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681 |
0 | 682 JRT_ENTRY(void, SharedRuntime::throw_ArithmeticException(JavaThread* thread)) |
683 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArithmeticException(), "/ by zero"); | |
684 JRT_END | |
685 | |
686 JRT_ENTRY(void, SharedRuntime::throw_NullPointerException(JavaThread* thread)) | |
687 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException()); | |
688 JRT_END | |
689 | |
690 JRT_ENTRY(void, SharedRuntime::throw_NullPointerException_at_call(JavaThread* thread)) | |
691 // This entry point is effectively only used for NullPointerExceptions which occur at inline | |
692 // cache sites (when the callee activation is not yet set up) so we are at a call site | |
693 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException()); | |
694 JRT_END | |
695 | |
696 JRT_ENTRY(void, SharedRuntime::throw_StackOverflowError(JavaThread* thread)) | |
697 // We avoid using the normal exception construction in this case because | |
698 // it performs an upcall to Java, and we're already out of stack space. | |
699 klassOop k = SystemDictionary::StackOverflowError_klass(); | |
700 oop exception_oop = instanceKlass::cast(k)->allocate_instance(CHECK); | |
701 Handle exception (thread, exception_oop); | |
702 if (StackTraceInThrowable) { | |
703 java_lang_Throwable::fill_in_stack_trace(exception); | |
704 } | |
705 throw_and_post_jvmti_exception(thread, exception); | |
706 JRT_END | |
707 | |
708 address SharedRuntime::continuation_for_implicit_exception(JavaThread* thread, | |
709 address pc, | |
710 SharedRuntime::ImplicitExceptionKind exception_kind) | |
711 { | |
712 address target_pc = NULL; | |
713 | |
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 if (TraceSignals) { |
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790 tty->print_cr(err_msg("calling implicit call stub relative pc=%d method name = %s", pc - nm->entry_point(), nm->method()->name()->as_C_string())); |
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791 } |
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792 target_pc = Runtime1::entry_for(Runtime1::c1x_global_implicit_null_id); |
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793 } else { |
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794 target_pc = nm->continuation_for_implicit_exception(pc); |
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795 } |
1250 | 796 // If there's an unexpected fault, target_pc might be NULL, |
797 // in which case we want to fall through into the normal | |
798 // error handling code. | |
0 | 799 } |
800 | |
801 break; // fall through | |
802 } | |
803 | |
804 | |
805 case IMPLICIT_DIVIDE_BY_ZERO: { | |
806 nmethod* nm = CodeCache::find_nmethod(pc); | |
807 guarantee(nm != NULL, "must have containing nmethod for implicit division-by-zero exceptions"); | |
808 #ifndef PRODUCT | |
809 _implicit_div0_throws++; | |
810 #endif | |
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811 if (UseC1X) { |
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812 tty->print_cr("c1x implicit div0"); |
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813 target_pc = Runtime1::entry_for(Runtime1::c1x_throw_div0_exception_id); |
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814 } else { |
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815 target_pc = nm->continuation_for_implicit_exception(pc); |
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816 } |
1250 | 817 // If there's an unexpected fault, target_pc might be NULL, |
818 // in which case we want to fall through into the normal | |
819 // error handling code. | |
0 | 820 break; // fall through |
821 } | |
822 | |
823 default: ShouldNotReachHere(); | |
824 } | |
825 | |
826 assert(exception_kind == IMPLICIT_NULL || exception_kind == IMPLICIT_DIVIDE_BY_ZERO, "wrong implicit exception kind"); | |
827 | |
828 // for AbortVMOnException flag | |
829 NOT_PRODUCT(Exceptions::debug_check_abort("java.lang.NullPointerException")); | |
830 if (exception_kind == IMPLICIT_NULL) { | |
831 Events::log("Implicit null exception at " INTPTR_FORMAT " to " INTPTR_FORMAT, pc, target_pc); | |
832 } else { | |
833 Events::log("Implicit division by zero exception at " INTPTR_FORMAT " to " INTPTR_FORMAT, pc, target_pc); | |
834 } | |
835 return target_pc; | |
836 } | |
837 | |
838 ShouldNotReachHere(); | |
839 return NULL; | |
840 } | |
841 | |
842 | |
843 JNI_ENTRY(void, throw_unsatisfied_link_error(JNIEnv* env, ...)) | |
844 { | |
845 THROW(vmSymbols::java_lang_UnsatisfiedLinkError()); | |
846 } | |
847 JNI_END | |
848 | |
849 | |
850 address SharedRuntime::native_method_throw_unsatisfied_link_error_entry() { | |
851 return CAST_FROM_FN_PTR(address, &throw_unsatisfied_link_error); | |
852 } | |
853 | |
854 | |
855 #ifndef PRODUCT | |
856 JRT_ENTRY(intptr_t, SharedRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2)) | |
857 const frame f = thread->last_frame(); | |
858 assert(f.is_interpreted_frame(), "must be an interpreted frame"); | |
859 #ifndef PRODUCT | |
860 methodHandle mh(THREAD, f.interpreter_frame_method()); | |
861 BytecodeTracer::trace(mh, f.interpreter_frame_bcp(), tos, tos2); | |
862 #endif // !PRODUCT | |
863 return preserve_this_value; | |
864 JRT_END | |
865 #endif // !PRODUCT | |
866 | |
867 | |
868 JRT_ENTRY(void, SharedRuntime::yield_all(JavaThread* thread, int attempts)) | |
869 os::yield_all(attempts); | |
870 JRT_END | |
871 | |
872 | |
873 JRT_ENTRY_NO_ASYNC(void, SharedRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) | |
874 assert(obj->is_oop(), "must be a valid oop"); | |
875 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise"); | |
876 instanceKlass::register_finalizer(instanceOop(obj), CHECK); | |
877 JRT_END | |
878 | |
879 | |
880 jlong SharedRuntime::get_java_tid(Thread* thread) { | |
881 if (thread != NULL) { | |
882 if (thread->is_Java_thread()) { | |
883 oop obj = ((JavaThread*)thread)->threadObj(); | |
884 return (obj == NULL) ? 0 : java_lang_Thread::thread_id(obj); | |
885 } | |
886 } | |
887 return 0; | |
888 } | |
889 | |
890 /** | |
891 * This function ought to be a void function, but cannot be because | |
892 * it gets turned into a tail-call on sparc, which runs into dtrace bug | |
893 * 6254741. Once that is fixed we can remove the dummy return value. | |
894 */ | |
895 int SharedRuntime::dtrace_object_alloc(oopDesc* o) { | |
896 return dtrace_object_alloc_base(Thread::current(), o); | |
897 } | |
898 | |
899 int SharedRuntime::dtrace_object_alloc_base(Thread* thread, oopDesc* o) { | |
900 assert(DTraceAllocProbes, "wrong call"); | |
901 Klass* klass = o->blueprint(); | |
902 int size = o->size(); | |
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903 Symbol* name = klass->name(); |
0 | 904 HS_DTRACE_PROBE4(hotspot, object__alloc, get_java_tid(thread), |
905 name->bytes(), name->utf8_length(), size * HeapWordSize); | |
906 return 0; | |
907 } | |
908 | |
909 JRT_LEAF(int, SharedRuntime::dtrace_method_entry( | |
910 JavaThread* thread, methodOopDesc* method)) | |
911 assert(DTraceMethodProbes, "wrong call"); | |
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912 Symbol* kname = method->klass_name(); |
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913 Symbol* name = method->name(); |
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914 Symbol* sig = method->signature(); |
0 | 915 HS_DTRACE_PROBE7(hotspot, method__entry, get_java_tid(thread), |
916 kname->bytes(), kname->utf8_length(), | |
917 name->bytes(), name->utf8_length(), | |
918 sig->bytes(), sig->utf8_length()); | |
919 return 0; | |
920 JRT_END | |
921 | |
922 JRT_LEAF(int, SharedRuntime::dtrace_method_exit( | |
923 JavaThread* thread, methodOopDesc* method)) | |
924 assert(DTraceMethodProbes, "wrong call"); | |
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925 Symbol* kname = method->klass_name(); |
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926 Symbol* name = method->name(); |
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927 Symbol* sig = method->signature(); |
0 | 928 HS_DTRACE_PROBE7(hotspot, method__return, get_java_tid(thread), |
929 kname->bytes(), kname->utf8_length(), | |
930 name->bytes(), name->utf8_length(), | |
931 sig->bytes(), sig->utf8_length()); | |
932 return 0; | |
933 JRT_END | |
934 | |
935 | |
936 // Finds receiver, CallInfo (i.e. receiver method), and calling bytecode) | |
937 // for a call current in progress, i.e., arguments has been pushed on stack | |
938 // put callee has not been invoked yet. Used by: resolve virtual/static, | |
939 // vtable updates, etc. Caller frame must be compiled. | |
940 Handle SharedRuntime::find_callee_info(JavaThread* thread, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS) { | |
941 ResourceMark rm(THREAD); | |
942 | |
943 // last java frame on stack (which includes native call frames) | |
944 vframeStream vfst(thread, true); // Do not skip and javaCalls | |
945 | |
946 return find_callee_info_helper(thread, vfst, bc, callinfo, CHECK_(Handle())); | |
947 } | |
948 | |
949 | |
950 // Finds receiver, CallInfo (i.e. receiver method), and calling bytecode | |
951 // for a call current in progress, i.e., arguments has been pushed on stack | |
952 // but callee has not been invoked yet. Caller frame must be compiled. | |
953 Handle SharedRuntime::find_callee_info_helper(JavaThread* thread, | |
954 vframeStream& vfst, | |
955 Bytecodes::Code& bc, | |
956 CallInfo& callinfo, TRAPS) { | |
957 Handle receiver; | |
958 Handle nullHandle; //create a handy null handle for exception returns | |
959 | |
960 assert(!vfst.at_end(), "Java frame must exist"); | |
961 | |
962 // Find caller and bci from vframe | |
963 methodHandle caller (THREAD, vfst.method()); | |
964 int bci = vfst.bci(); | |
965 | |
966 // Find bytecode | |
2142 | 967 Bytecode_invoke bytecode(caller, bci); |
968 bc = bytecode.java_code(); | |
969 int bytecode_index = bytecode.index(); | |
0 | 970 |
971 // Find receiver for non-static call | |
972 if (bc != Bytecodes::_invokestatic) { | |
973 // This register map must be update since we need to find the receiver for | |
974 // compiled frames. The receiver might be in a register. | |
975 RegisterMap reg_map2(thread); | |
976 frame stubFrame = thread->last_frame(); | |
977 // Caller-frame is a compiled frame | |
978 frame callerFrame = stubFrame.sender(®_map2); | |
979 | |
2142 | 980 methodHandle callee = bytecode.static_target(CHECK_(nullHandle)); |
0 | 981 if (callee.is_null()) { |
982 THROW_(vmSymbols::java_lang_NoSuchMethodException(), nullHandle); | |
983 } | |
984 // Retrieve from a compiled argument list | |
985 receiver = Handle(THREAD, callerFrame.retrieve_receiver(®_map2)); | |
986 | |
987 if (receiver.is_null()) { | |
988 THROW_(vmSymbols::java_lang_NullPointerException(), nullHandle); | |
989 } | |
990 } | |
991 | |
992 // Resolve method. This is parameterized by bytecode. | |
993 constantPoolHandle constants (THREAD, caller->constants()); | |
994 assert (receiver.is_null() || receiver->is_oop(), "wrong receiver"); | |
995 LinkResolver::resolve_invoke(callinfo, receiver, constants, bytecode_index, bc, CHECK_(nullHandle)); | |
996 | |
997 #ifdef ASSERT | |
998 // Check that the receiver klass is of the right subtype and that it is initialized for virtual calls | |
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999 if (bc != Bytecodes::_invokestatic && bc != Bytecodes::_invokedynamic) { |
0 | 1000 assert(receiver.not_null(), "should have thrown exception"); |
1001 KlassHandle receiver_klass (THREAD, receiver->klass()); | |
1002 klassOop rk = constants->klass_ref_at(bytecode_index, CHECK_(nullHandle)); | |
1003 // klass is already loaded | |
1004 KlassHandle static_receiver_klass (THREAD, rk); | |
1005 assert(receiver_klass->is_subtype_of(static_receiver_klass()), "actual receiver must be subclass of static receiver klass"); | |
1006 if (receiver_klass->oop_is_instance()) { | |
1007 if (instanceKlass::cast(receiver_klass())->is_not_initialized()) { | |
1008 tty->print_cr("ERROR: Klass not yet initialized!!"); | |
1009 receiver_klass.print(); | |
1010 } | |
1011 assert (!instanceKlass::cast(receiver_klass())->is_not_initialized(), "receiver_klass must be initialized"); | |
1012 } | |
1013 } | |
1014 #endif | |
1015 | |
1016 return receiver; | |
1017 } | |
1018 | |
1019 methodHandle SharedRuntime::find_callee_method(JavaThread* thread, TRAPS) { | |
1020 ResourceMark rm(THREAD); | |
1021 // We need first to check if any Java activations (compiled, interpreted) | |
1022 // exist on the stack since last JavaCall. If not, we need | |
1023 // to get the target method from the JavaCall wrapper. | |
1024 vframeStream vfst(thread, true); // Do not skip any javaCalls | |
1025 methodHandle callee_method; | |
1026 if (vfst.at_end()) { | |
1027 // No Java frames were found on stack since we did the JavaCall. | |
1028 // Hence the stack can only contain an entry_frame. We need to | |
1029 // find the target method from the stub frame. | |
1030 RegisterMap reg_map(thread, false); | |
1031 frame fr = thread->last_frame(); | |
1032 assert(fr.is_runtime_frame(), "must be a runtimeStub"); | |
1033 fr = fr.sender(®_map); | |
1034 assert(fr.is_entry_frame(), "must be"); | |
1035 // fr is now pointing to the entry frame. | |
1036 callee_method = methodHandle(THREAD, fr.entry_frame_call_wrapper()->callee_method()); | |
1037 assert(fr.entry_frame_call_wrapper()->receiver() == NULL || !callee_method->is_static(), "non-null receiver for static call??"); | |
1038 } else { | |
1039 Bytecodes::Code bc; | |
1040 CallInfo callinfo; | |
1041 find_callee_info_helper(thread, vfst, bc, callinfo, CHECK_(methodHandle())); | |
1042 callee_method = callinfo.selected_method(); | |
1043 } | |
1044 assert(callee_method()->is_method(), "must be"); | |
1045 return callee_method; | |
1046 } | |
1047 | |
1048 // Resolves a call. | |
1049 methodHandle SharedRuntime::resolve_helper(JavaThread *thread, | |
1050 bool is_virtual, | |
1051 bool is_optimized, TRAPS) { | |
1052 methodHandle callee_method; | |
1053 callee_method = resolve_sub_helper(thread, is_virtual, is_optimized, THREAD); | |
1054 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { | |
1055 int retry_count = 0; | |
1056 while (!HAS_PENDING_EXCEPTION && callee_method->is_old() && | |
1142 | 1057 callee_method->method_holder() != SystemDictionary::Object_klass()) { |
0 | 1058 // If has a pending exception then there is no need to re-try to |
1059 // resolve this method. | |
1060 // If the method has been redefined, we need to try again. | |
1061 // Hack: we have no way to update the vtables of arrays, so don't | |
1062 // require that java.lang.Object has been updated. | |
1063 | |
1064 // It is very unlikely that method is redefined more than 100 times | |
1065 // in the middle of resolve. If it is looping here more than 100 times | |
1066 // means then there could be a bug here. | |
1067 guarantee((retry_count++ < 100), | |
1068 "Could not resolve to latest version of redefined method"); | |
1069 // method is redefined in the middle of resolve so re-try. | |
1070 callee_method = resolve_sub_helper(thread, is_virtual, is_optimized, THREAD); | |
1071 } | |
1072 } | |
1073 return callee_method; | |
1074 } | |
1075 | |
1076 // Resolves a call. The compilers generate code for calls that go here | |
1077 // and are patched with the real destination of the call. | |
1078 methodHandle SharedRuntime::resolve_sub_helper(JavaThread *thread, | |
1079 bool is_virtual, | |
1080 bool is_optimized, TRAPS) { | |
1081 | |
1082 ResourceMark rm(thread); | |
1083 RegisterMap cbl_map(thread, false); | |
1084 frame caller_frame = thread->last_frame().sender(&cbl_map); | |
1085 | |
1295 | 1086 CodeBlob* caller_cb = caller_frame.cb(); |
1087 guarantee(caller_cb != NULL && caller_cb->is_nmethod(), "must be called from nmethod"); | |
1088 nmethod* caller_nm = caller_cb->as_nmethod_or_null(); | |
0 | 1089 // make sure caller is not getting deoptimized |
1090 // and removed before we are done with it. | |
1091 // CLEANUP - with lazy deopt shouldn't need this lock | |
1295 | 1092 nmethodLocker caller_lock(caller_nm); |
0 | 1093 |
1094 | |
1095 // determine call info & receiver | |
1096 // note: a) receiver is NULL for static calls | |
1097 // b) an exception is thrown if receiver is NULL for non-static calls | |
1098 CallInfo call_info; | |
1099 Bytecodes::Code invoke_code = Bytecodes::_illegal; | |
1100 Handle receiver = find_callee_info(thread, invoke_code, | |
1101 call_info, CHECK_(methodHandle())); | |
1102 methodHandle callee_method = call_info.selected_method(); | |
1103 | |
1104 assert((!is_virtual && invoke_code == Bytecodes::_invokestatic) || | |
1105 ( is_virtual && invoke_code != Bytecodes::_invokestatic), "inconsistent bytecode"); | |
1106 | |
1107 #ifndef PRODUCT | |
1108 // tracing/debugging/statistics | |
1109 int *addr = (is_optimized) ? (&_resolve_opt_virtual_ctr) : | |
1110 (is_virtual) ? (&_resolve_virtual_ctr) : | |
1111 (&_resolve_static_ctr); | |
1112 Atomic::inc(addr); | |
1113 | |
1114 if (TraceCallFixup) { | |
1115 ResourceMark rm(thread); | |
1116 tty->print("resolving %s%s (%s) call to", | |
1117 (is_optimized) ? "optimized " : "", (is_virtual) ? "virtual" : "static", | |
1118 Bytecodes::name(invoke_code)); | |
1119 callee_method->print_short_name(tty); | |
1120 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1121 } | |
1122 #endif | |
1123 | |
1295 | 1124 // JSR 292 |
1125 // If the resolved method is a MethodHandle invoke target the call | |
1126 // site must be a MethodHandle call site. | |
1127 if (callee_method->is_method_handle_invoke()) { | |
1128 assert(caller_nm->is_method_handle_return(caller_frame.pc()), "must be MH call site"); | |
1129 } | |
1130 | |
0 | 1131 // Compute entry points. This might require generation of C2I converter |
1132 // frames, so we cannot be holding any locks here. Furthermore, the | |
1133 // computation of the entry points is independent of patching the call. We | |
1134 // always return the entry-point, but we only patch the stub if the call has | |
1135 // not been deoptimized. Return values: For a virtual call this is an | |
1136 // (cached_oop, destination address) pair. For a static call/optimized | |
1137 // virtual this is just a destination address. | |
1138 | |
1139 StaticCallInfo static_call_info; | |
1140 CompiledICInfo virtual_call_info; | |
1141 | |
1142 // Make sure the callee nmethod does not get deoptimized and removed before | |
1143 // we are done patching the code. | |
1295 | 1144 nmethod* callee_nm = callee_method->code(); |
1145 nmethodLocker nl_callee(callee_nm); | |
0 | 1146 #ifdef ASSERT |
1295 | 1147 address dest_entry_point = callee_nm == NULL ? 0 : callee_nm->entry_point(); // used below |
0 | 1148 #endif |
1149 | |
1150 if (is_virtual) { | |
1151 assert(receiver.not_null(), "sanity check"); | |
1152 bool static_bound = call_info.resolved_method()->can_be_statically_bound(); | |
1153 KlassHandle h_klass(THREAD, receiver->klass()); | |
1154 CompiledIC::compute_monomorphic_entry(callee_method, h_klass, | |
1155 is_optimized, static_bound, virtual_call_info, | |
1156 CHECK_(methodHandle())); | |
1157 } else { | |
1158 // static call | |
1159 CompiledStaticCall::compute_entry(callee_method, static_call_info); | |
1160 } | |
1161 | |
1162 // grab lock, check for deoptimization and potentially patch caller | |
1163 { | |
1164 MutexLocker ml_patch(CompiledIC_lock); | |
1165 | |
1166 // Now that we are ready to patch if the methodOop was redefined then | |
1167 // don't update call site and let the caller retry. | |
1168 | |
1169 if (!callee_method->is_old()) { | |
1170 #ifdef ASSERT | |
1171 // We must not try to patch to jump to an already unloaded method. | |
1172 if (dest_entry_point != 0) { | |
1173 assert(CodeCache::find_blob(dest_entry_point) != NULL, | |
1174 "should not unload nmethod while locked"); | |
1175 } | |
1176 #endif | |
1177 if (is_virtual) { | |
1178 CompiledIC* inline_cache = CompiledIC_before(caller_frame.pc()); | |
1179 if (inline_cache->is_clean()) { | |
1180 inline_cache->set_to_monomorphic(virtual_call_info); | |
1181 } | |
1182 } else { | |
1183 CompiledStaticCall* ssc = compiledStaticCall_before(caller_frame.pc()); | |
1184 if (ssc->is_clean()) ssc->set(static_call_info); | |
1185 } | |
1186 } | |
1187 | |
1188 } // unlock CompiledIC_lock | |
1189 | |
1190 return callee_method; | |
1191 } | |
1192 | |
1193 | |
1194 // Inline caches exist only in compiled code | |
1195 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_ic_miss(JavaThread* thread)) | |
1196 #ifdef ASSERT | |
1197 RegisterMap reg_map(thread, false); | |
1198 frame stub_frame = thread->last_frame(); | |
1199 assert(stub_frame.is_runtime_frame(), "sanity check"); | |
1200 frame caller_frame = stub_frame.sender(®_map); | |
1201 assert(!caller_frame.is_interpreted_frame() && !caller_frame.is_entry_frame(), "unexpected frame"); | |
1202 #endif /* ASSERT */ | |
1203 | |
1204 methodHandle callee_method; | |
1205 JRT_BLOCK | |
1206 callee_method = SharedRuntime::handle_ic_miss_helper(thread, CHECK_NULL); | |
1207 // Return methodOop through TLS | |
1208 thread->set_vm_result(callee_method()); | |
1209 JRT_BLOCK_END | |
1210 // return compiled code entry point after potential safepoints | |
1211 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1212 return callee_method->verified_code_entry(); | |
1213 JRT_END | |
1214 | |
1215 | |
1216 // Handle call site that has been made non-entrant | |
1217 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method(JavaThread* thread)) | |
1218 // 6243940 We might end up in here if the callee is deoptimized | |
1219 // as we race to call it. We don't want to take a safepoint if | |
1220 // the caller was interpreted because the caller frame will look | |
1221 // interpreted to the stack walkers and arguments are now | |
1222 // "compiled" so it is much better to make this transition | |
1223 // invisible to the stack walking code. The i2c path will | |
1224 // place the callee method in the callee_target. It is stashed | |
1225 // there because if we try and find the callee by normal means a | |
1226 // safepoint is possible and have trouble gc'ing the compiled args. | |
1227 RegisterMap reg_map(thread, false); | |
1228 frame stub_frame = thread->last_frame(); | |
1229 assert(stub_frame.is_runtime_frame(), "sanity check"); | |
1230 frame caller_frame = stub_frame.sender(®_map); | |
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1231 |
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1232 // MethodHandle invokes don't have a CompiledIC and should always |
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1233 // simply redispatch to the callee_target. |
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1234 address sender_pc = caller_frame.pc(); |
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1235 CodeBlob* sender_cb = caller_frame.cb(); |
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1236 nmethod* sender_nm = sender_cb->as_nmethod_or_null(); |
1204 | 1237 bool is_mh_invoke_via_adapter = false; // Direct c2c call or via adapter? |
1238 if (sender_nm != NULL && sender_nm->is_method_handle_return(sender_pc)) { | |
1239 // If the callee_target is set, then we have come here via an i2c | |
1240 // adapter. | |
1241 methodOop callee = thread->callee_target(); | |
1242 if (callee != NULL) { | |
1243 assert(callee->is_method(), "sanity"); | |
1244 is_mh_invoke_via_adapter = true; | |
1245 } | |
1246 } | |
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1247 |
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1248 if (caller_frame.is_interpreted_frame() || |
1204 | 1249 caller_frame.is_entry_frame() || |
1250 is_mh_invoke_via_adapter) { | |
0 | 1251 methodOop callee = thread->callee_target(); |
1252 guarantee(callee != NULL && callee->is_method(), "bad handshake"); | |
1253 thread->set_vm_result(callee); | |
1254 thread->set_callee_target(NULL); | |
1255 return callee->get_c2i_entry(); | |
1256 } | |
1257 | |
1258 // Must be compiled to compiled path which is safe to stackwalk | |
1259 methodHandle callee_method; | |
1260 JRT_BLOCK | |
1261 // Force resolving of caller (if we called from compiled frame) | |
1262 callee_method = SharedRuntime::reresolve_call_site(thread, CHECK_NULL); | |
1263 thread->set_vm_result(callee_method()); | |
1264 JRT_BLOCK_END | |
1265 // return compiled code entry point after potential safepoints | |
1266 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1267 return callee_method->verified_code_entry(); | |
1268 JRT_END | |
1269 | |
1270 | |
1271 // resolve a static call and patch code | |
1272 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_static_call_C(JavaThread *thread )) | |
1273 methodHandle callee_method; | |
1274 JRT_BLOCK | |
1275 callee_method = SharedRuntime::resolve_helper(thread, false, false, CHECK_NULL); | |
1276 thread->set_vm_result(callee_method()); | |
1277 JRT_BLOCK_END | |
1278 // return compiled code entry point after potential safepoints | |
1279 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1280 return callee_method->verified_code_entry(); | |
1281 JRT_END | |
1282 | |
1283 | |
1284 // resolve virtual call and update inline cache to monomorphic | |
1285 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_virtual_call_C(JavaThread *thread )) | |
1286 methodHandle callee_method; | |
1287 JRT_BLOCK | |
1288 callee_method = SharedRuntime::resolve_helper(thread, true, false, CHECK_NULL); | |
1289 thread->set_vm_result(callee_method()); | |
1290 JRT_BLOCK_END | |
1291 // return compiled code entry point after potential safepoints | |
1292 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1293 return callee_method->verified_code_entry(); | |
1294 JRT_END | |
1295 | |
1296 | |
1297 // Resolve a virtual call that can be statically bound (e.g., always | |
1298 // monomorphic, so it has no inline cache). Patch code to resolved target. | |
1299 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_opt_virtual_call_C(JavaThread *thread)) | |
1300 methodHandle callee_method; | |
1301 JRT_BLOCK | |
1302 callee_method = SharedRuntime::resolve_helper(thread, true, true, CHECK_NULL); | |
1303 thread->set_vm_result(callee_method()); | |
1304 JRT_BLOCK_END | |
1305 // return compiled code entry point after potential safepoints | |
1306 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1307 return callee_method->verified_code_entry(); | |
1308 JRT_END | |
1309 | |
1310 | |
1311 | |
1312 | |
1313 | |
1314 methodHandle SharedRuntime::handle_ic_miss_helper(JavaThread *thread, TRAPS) { | |
1315 ResourceMark rm(thread); | |
1316 CallInfo call_info; | |
1317 Bytecodes::Code bc; | |
1318 | |
1319 // receiver is NULL for static calls. An exception is thrown for NULL | |
1320 // receivers for non-static calls | |
1321 Handle receiver = find_callee_info(thread, bc, call_info, | |
1322 CHECK_(methodHandle())); | |
1323 // Compiler1 can produce virtual call sites that can actually be statically bound | |
1324 // If we fell thru to below we would think that the site was going megamorphic | |
1325 // when in fact the site can never miss. Worse because we'd think it was megamorphic | |
1326 // we'd try and do a vtable dispatch however methods that can be statically bound | |
1327 // don't have vtable entries (vtable_index < 0) and we'd blow up. So we force a | |
1328 // reresolution of the call site (as if we did a handle_wrong_method and not an | |
1329 // plain ic_miss) and the site will be converted to an optimized virtual call site | |
1330 // never to miss again. I don't believe C2 will produce code like this but if it | |
1331 // did this would still be the correct thing to do for it too, hence no ifdef. | |
1332 // | |
1333 if (call_info.resolved_method()->can_be_statically_bound()) { | |
1334 methodHandle callee_method = SharedRuntime::reresolve_call_site(thread, CHECK_(methodHandle())); | |
1335 if (TraceCallFixup) { | |
1336 RegisterMap reg_map(thread, false); | |
1337 frame caller_frame = thread->last_frame().sender(®_map); | |
1338 ResourceMark rm(thread); | |
1339 tty->print("converting IC miss to reresolve (%s) call to", Bytecodes::name(bc)); | |
1340 callee_method->print_short_name(tty); | |
1341 tty->print_cr(" from pc: " INTPTR_FORMAT, caller_frame.pc()); | |
1342 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1343 } | |
1344 return callee_method; | |
1345 } | |
1346 | |
1347 methodHandle callee_method = call_info.selected_method(); | |
1348 | |
1349 bool should_be_mono = false; | |
1350 | |
1351 #ifndef PRODUCT | |
1352 Atomic::inc(&_ic_miss_ctr); | |
1353 | |
1354 // Statistics & Tracing | |
1355 if (TraceCallFixup) { | |
1356 ResourceMark rm(thread); | |
1357 tty->print("IC miss (%s) call to", Bytecodes::name(bc)); | |
1358 callee_method->print_short_name(tty); | |
1359 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1360 } | |
1361 | |
1362 if (ICMissHistogram) { | |
1363 MutexLocker m(VMStatistic_lock); | |
1364 RegisterMap reg_map(thread, false); | |
1365 frame f = thread->last_frame().real_sender(®_map);// skip runtime stub | |
1366 // produce statistics under the lock | |
1367 trace_ic_miss(f.pc()); | |
1368 } | |
1369 #endif | |
1370 | |
1371 // install an event collector so that when a vtable stub is created the | |
1372 // profiler can be notified via a DYNAMIC_CODE_GENERATED event. The | |
1373 // event can't be posted when the stub is created as locks are held | |
1374 // - instead the event will be deferred until the event collector goes | |
1375 // out of scope. | |
1376 JvmtiDynamicCodeEventCollector event_collector; | |
1377 | |
1378 // Update inline cache to megamorphic. Skip update if caller has been | |
1379 // made non-entrant or we are called from interpreted. | |
1380 { MutexLocker ml_patch (CompiledIC_lock); | |
1381 RegisterMap reg_map(thread, false); | |
1382 frame caller_frame = thread->last_frame().sender(®_map); | |
1383 CodeBlob* cb = caller_frame.cb(); | |
1384 if (cb->is_nmethod() && ((nmethod*)cb)->is_in_use()) { | |
1385 // Not a non-entrant nmethod, so find inline_cache | |
1386 CompiledIC* inline_cache = CompiledIC_before(caller_frame.pc()); | |
1387 bool should_be_mono = false; | |
1388 if (inline_cache->is_optimized()) { | |
1389 if (TraceCallFixup) { | |
1390 ResourceMark rm(thread); | |
1391 tty->print("OPTIMIZED IC miss (%s) call to", Bytecodes::name(bc)); | |
1392 callee_method->print_short_name(tty); | |
1393 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1394 } | |
1395 should_be_mono = true; | |
1396 } else { | |
1397 compiledICHolderOop ic_oop = (compiledICHolderOop) inline_cache->cached_oop(); | |
1398 if ( ic_oop != NULL && ic_oop->is_compiledICHolder()) { | |
1399 | |
1400 if (receiver()->klass() == ic_oop->holder_klass()) { | |
1401 // This isn't a real miss. We must have seen that compiled code | |
1402 // is now available and we want the call site converted to a | |
1403 // monomorphic compiled call site. | |
1404 // We can't assert for callee_method->code() != NULL because it | |
1405 // could have been deoptimized in the meantime | |
1406 if (TraceCallFixup) { | |
1407 ResourceMark rm(thread); | |
1408 tty->print("FALSE IC miss (%s) converting to compiled call to", Bytecodes::name(bc)); | |
1409 callee_method->print_short_name(tty); | |
1410 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1411 } | |
1412 should_be_mono = true; | |
1413 } | |
1414 } | |
1415 } | |
1416 | |
1417 if (should_be_mono) { | |
1418 | |
1419 // We have a path that was monomorphic but was going interpreted | |
1420 // and now we have (or had) a compiled entry. We correct the IC | |
1421 // by using a new icBuffer. | |
1422 CompiledICInfo info; | |
1423 KlassHandle receiver_klass(THREAD, receiver()->klass()); | |
1424 inline_cache->compute_monomorphic_entry(callee_method, | |
1425 receiver_klass, | |
1426 inline_cache->is_optimized(), | |
1427 false, | |
1428 info, CHECK_(methodHandle())); | |
1429 inline_cache->set_to_monomorphic(info); | |
1430 } else if (!inline_cache->is_megamorphic() && !inline_cache->is_clean()) { | |
1431 // Change to megamorphic | |
1432 inline_cache->set_to_megamorphic(&call_info, bc, CHECK_(methodHandle())); | |
1433 } else { | |
1434 // Either clean or megamorphic | |
1435 } | |
1436 } | |
1437 } // Release CompiledIC_lock | |
1438 | |
1439 return callee_method; | |
1440 } | |
1441 | |
1442 // | |
1443 // Resets a call-site in compiled code so it will get resolved again. | |
1444 // This routines handles both virtual call sites, optimized virtual call | |
1445 // sites, and static call sites. Typically used to change a call sites | |
1446 // destination from compiled to interpreted. | |
1447 // | |
1448 methodHandle SharedRuntime::reresolve_call_site(JavaThread *thread, TRAPS) { | |
1449 ResourceMark rm(thread); | |
1450 RegisterMap reg_map(thread, false); | |
1451 frame stub_frame = thread->last_frame(); | |
1452 assert(stub_frame.is_runtime_frame(), "must be a runtimeStub"); | |
1453 frame caller = stub_frame.sender(®_map); | |
1454 | |
1455 // Do nothing if the frame isn't a live compiled frame. | |
1456 // nmethod could be deoptimized by the time we get here | |
1457 // so no update to the caller is needed. | |
1458 | |
1459 if (caller.is_compiled_frame() && !caller.is_deoptimized_frame()) { | |
1460 | |
1461 address pc = caller.pc(); | |
1462 Events::log("update call-site at pc " INTPTR_FORMAT, pc); | |
1463 | |
1464 // Default call_addr is the location of the "basic" call. | |
1465 // Determine the address of the call we a reresolving. With | |
1466 // Inline Caches we will always find a recognizable call. | |
1467 // With Inline Caches disabled we may or may not find a | |
1468 // recognizable call. We will always find a call for static | |
1469 // calls and for optimized virtual calls. For vanilla virtual | |
1470 // calls it depends on the state of the UseInlineCaches switch. | |
1471 // | |
1472 // With Inline Caches disabled we can get here for a virtual call | |
1473 // for two reasons: | |
1474 // 1 - calling an abstract method. The vtable for abstract methods | |
1475 // will run us thru handle_wrong_method and we will eventually | |
1476 // end up in the interpreter to throw the ame. | |
1477 // 2 - a racing deoptimization. We could be doing a vanilla vtable | |
1478 // call and between the time we fetch the entry address and | |
1479 // we jump to it the target gets deoptimized. Similar to 1 | |
1480 // we will wind up in the interprter (thru a c2i with c2). | |
1481 // | |
1482 address call_addr = NULL; | |
1483 { | |
1484 // Get call instruction under lock because another thread may be | |
1485 // busy patching it. | |
1486 MutexLockerEx ml_patch(Patching_lock, Mutex::_no_safepoint_check_flag); | |
1487 // Location of call instruction | |
1488 if (NativeCall::is_call_before(pc)) { | |
1489 NativeCall *ncall = nativeCall_before(pc); | |
1490 call_addr = ncall->instruction_address(); | |
1491 } | |
1492 } | |
1493 | |
1494 // Check for static or virtual call | |
1495 bool is_static_call = false; | |
1496 nmethod* caller_nm = CodeCache::find_nmethod(pc); | |
1497 // Make sure nmethod doesn't get deoptimized and removed until | |
1498 // this is done with it. | |
1499 // CLEANUP - with lazy deopt shouldn't need this lock | |
1500 nmethodLocker nmlock(caller_nm); | |
1501 | |
1502 if (call_addr != NULL) { | |
1503 RelocIterator iter(caller_nm, call_addr, call_addr+1); | |
1504 int ret = iter.next(); // Get item | |
1505 if (ret) { | |
1506 assert(iter.addr() == call_addr, "must find call"); | |
1507 if (iter.type() == relocInfo::static_call_type) { | |
1508 is_static_call = true; | |
1509 } else { | |
1510 assert(iter.type() == relocInfo::virtual_call_type || | |
1511 iter.type() == relocInfo::opt_virtual_call_type | |
1512 , "unexpected relocInfo. type"); | |
1513 } | |
1514 } else { | |
1515 assert(!UseInlineCaches, "relocation info. must exist for this address"); | |
1516 } | |
1517 | |
1518 // Cleaning the inline cache will force a new resolve. This is more robust | |
1519 // than directly setting it to the new destination, since resolving of calls | |
1520 // is always done through the same code path. (experience shows that it | |
1521 // leads to very hard to track down bugs, if an inline cache gets updated | |
1522 // to a wrong method). It should not be performance critical, since the | |
1523 // resolve is only done once. | |
1524 | |
1525 MutexLocker ml(CompiledIC_lock); | |
1526 // | |
1527 // We do not patch the call site if the nmethod has been made non-entrant | |
1528 // as it is a waste of time | |
1529 // | |
1530 if (caller_nm->is_in_use()) { | |
1531 if (is_static_call) { | |
1532 CompiledStaticCall* ssc= compiledStaticCall_at(call_addr); | |
1533 ssc->set_to_clean(); | |
1534 } else { | |
1535 // compiled, dispatched call (which used to call an interpreted method) | |
1536 CompiledIC* inline_cache = CompiledIC_at(call_addr); | |
1537 inline_cache->set_to_clean(); | |
1538 } | |
1539 } | |
1540 } | |
1541 | |
1542 } | |
1543 | |
1544 methodHandle callee_method = find_callee_method(thread, CHECK_(methodHandle())); | |
1545 | |
1546 | |
1547 #ifndef PRODUCT | |
1548 Atomic::inc(&_wrong_method_ctr); | |
1549 | |
1550 if (TraceCallFixup) { | |
1551 ResourceMark rm(thread); | |
1552 tty->print("handle_wrong_method reresolving call to"); | |
1553 callee_method->print_short_name(tty); | |
1554 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1555 } | |
1556 #endif | |
1557 | |
1558 return callee_method; | |
1559 } | |
1560 | |
1561 // --------------------------------------------------------------------------- | |
1562 // We are calling the interpreter via a c2i. Normally this would mean that | |
1563 // we were called by a compiled method. However we could have lost a race | |
1564 // where we went int -> i2c -> c2i and so the caller could in fact be | |
1205 | 1565 // interpreted. If the caller is compiled we attempt to patch the caller |
0 | 1566 // so he no longer calls into the interpreter. |
1567 IRT_LEAF(void, SharedRuntime::fixup_callers_callsite(methodOopDesc* method, address caller_pc)) | |
1568 methodOop moop(method); | |
1569 | |
1570 address entry_point = moop->from_compiled_entry(); | |
1571 | |
1572 // It's possible that deoptimization can occur at a call site which hasn't | |
1573 // been resolved yet, in which case this function will be called from | |
1574 // an nmethod that has been patched for deopt and we can ignore the | |
1575 // request for a fixup. | |
1576 // Also it is possible that we lost a race in that from_compiled_entry | |
1577 // is now back to the i2c in that case we don't need to patch and if | |
1578 // we did we'd leap into space because the callsite needs to use | |
1579 // "to interpreter" stub in order to load up the methodOop. Don't | |
1580 // ask me how I know this... | |
1581 | |
1582 CodeBlob* cb = CodeCache::find_blob(caller_pc); | |
1205 | 1583 if (!cb->is_nmethod() || entry_point == moop->get_c2i_entry()) { |
1584 return; | |
1585 } | |
1586 | |
1587 // The check above makes sure this is a nmethod. | |
1588 nmethod* nm = cb->as_nmethod_or_null(); | |
1589 assert(nm, "must be"); | |
1590 | |
1591 // Don't fixup MethodHandle call sites as c2i/i2c adapters are used | |
1592 // to implement MethodHandle actions. | |
1593 if (nm->is_method_handle_return(caller_pc)) { | |
0 | 1594 return; |
1595 } | |
1596 | |
1597 // There is a benign race here. We could be attempting to patch to a compiled | |
1598 // entry point at the same time the callee is being deoptimized. If that is | |
1599 // the case then entry_point may in fact point to a c2i and we'd patch the | |
1600 // call site with the same old data. clear_code will set code() to NULL | |
1601 // at the end of it. If we happen to see that NULL then we can skip trying | |
1602 // to patch. If we hit the window where the callee has a c2i in the | |
1603 // from_compiled_entry and the NULL isn't present yet then we lose the race | |
1604 // and patch the code with the same old data. Asi es la vida. | |
1605 | |
1606 if (moop->code() == NULL) return; | |
1607 | |
1205 | 1608 if (nm->is_in_use()) { |
0 | 1609 |
1610 // Expect to find a native call there (unless it was no-inline cache vtable dispatch) | |
1611 MutexLockerEx ml_patch(Patching_lock, Mutex::_no_safepoint_check_flag); | |
1612 if (NativeCall::is_call_before(caller_pc + frame::pc_return_offset)) { | |
1613 NativeCall *call = nativeCall_before(caller_pc + frame::pc_return_offset); | |
1614 // | |
1615 // bug 6281185. We might get here after resolving a call site to a vanilla | |
1616 // virtual call. Because the resolvee uses the verified entry it may then | |
1617 // see compiled code and attempt to patch the site by calling us. This would | |
1618 // then incorrectly convert the call site to optimized and its downhill from | |
1619 // there. If you're lucky you'll get the assert in the bugid, if not you've | |
1620 // just made a call site that could be megamorphic into a monomorphic site | |
1621 // for the rest of its life! Just another racing bug in the life of | |
1622 // fixup_callers_callsite ... | |
1623 // | |
1563
1a5913bf5e19
6951083: oops and relocations should part of nmethod not CodeBlob
twisti
parents:
1507
diff
changeset
|
1624 RelocIterator iter(nm, call->instruction_address(), call->next_instruction_address()); |
0 | 1625 iter.next(); |
1626 assert(iter.has_current(), "must have a reloc at java call site"); | |
1627 relocInfo::relocType typ = iter.reloc()->type(); | |
1628 if ( typ != relocInfo::static_call_type && | |
1629 typ != relocInfo::opt_virtual_call_type && | |
1630 typ != relocInfo::static_stub_type) { | |
1631 return; | |
1632 } | |
1633 address destination = call->destination(); | |
1634 if (destination != entry_point) { | |
1635 CodeBlob* callee = CodeCache::find_blob(destination); | |
1636 // callee == cb seems weird. It means calling interpreter thru stub. | |
1637 if (callee == cb || callee->is_adapter_blob()) { | |
1638 // static call or optimized virtual | |
1639 if (TraceCallFixup) { | |
1204 | 1640 tty->print("fixup callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); |
0 | 1641 moop->print_short_name(tty); |
1642 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
1643 } | |
1644 call->set_destination_mt_safe(entry_point); | |
1645 } else { | |
1646 if (TraceCallFixup) { | |
1647 tty->print("failed to fixup callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); | |
1648 moop->print_short_name(tty); | |
1649 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
1650 } | |
1651 // assert is too strong could also be resolve destinations. | |
1652 // assert(InlineCacheBuffer::contains(destination) || VtableStubs::contains(destination), "must be"); | |
1653 } | |
1654 } else { | |
1655 if (TraceCallFixup) { | |
1204 | 1656 tty->print("already patched callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); |
0 | 1657 moop->print_short_name(tty); |
1658 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
1659 } | |
1660 } | |
1661 } | |
1662 } | |
1663 | |
1664 IRT_END | |
1665 | |
1666 | |
1667 // same as JVM_Arraycopy, but called directly from compiled code | |
1668 JRT_ENTRY(void, SharedRuntime::slow_arraycopy_C(oopDesc* src, jint src_pos, | |
1669 oopDesc* dest, jint dest_pos, | |
1670 jint length, | |
1671 JavaThread* thread)) { | |
1672 #ifndef PRODUCT | |
1673 _slow_array_copy_ctr++; | |
1674 #endif | |
1675 // Check if we have null pointers | |
1676 if (src == NULL || dest == NULL) { | |
1677 THROW(vmSymbols::java_lang_NullPointerException()); | |
1678 } | |
1679 // Do the copy. The casts to arrayOop are necessary to the copy_array API, | |
1680 // even though the copy_array API also performs dynamic checks to ensure | |
1681 // that src and dest are truly arrays (and are conformable). | |
1682 // The copy_array mechanism is awkward and could be removed, but | |
1683 // the compilers don't call this function except as a last resort, | |
1684 // so it probably doesn't matter. | |
1685 Klass::cast(src->klass())->copy_array((arrayOopDesc*)src, src_pos, | |
1686 (arrayOopDesc*)dest, dest_pos, | |
1687 length, thread); | |
1688 } | |
1689 JRT_END | |
1690 | |
1691 char* SharedRuntime::generate_class_cast_message( | |
1692 JavaThread* thread, const char* objName) { | |
1693 | |
1694 // Get target class name from the checkcast instruction | |
1695 vframeStream vfst(thread, true); | |
1696 assert(!vfst.at_end(), "Java frame must exist"); | |
2142 | 1697 Bytecode_checkcast cc(vfst.method(), vfst.method()->bcp_from(vfst.bci())); |
0 | 1698 Klass* targetKlass = Klass::cast(vfst.method()->constants()->klass_at( |
2142 | 1699 cc.index(), thread)); |
0 | 1700 return generate_class_cast_message(objName, targetKlass->external_name()); |
1701 } | |
1702 | |
710 | 1703 char* SharedRuntime::generate_wrong_method_type_message(JavaThread* thread, |
1704 oopDesc* required, | |
1705 oopDesc* actual) { | |
1793
d257356e35f0
6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
jrose
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1748
diff
changeset
|
1706 if (TraceMethodHandles) { |
d257356e35f0
6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
jrose
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1748
diff
changeset
|
1707 tty->print_cr("WrongMethodType thread="PTR_FORMAT" req="PTR_FORMAT" act="PTR_FORMAT"", |
d257356e35f0
6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
jrose
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1748
diff
changeset
|
1708 thread, required, actual); |
d257356e35f0
6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
jrose
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1748
diff
changeset
|
1709 } |
710 | 1710 assert(EnableMethodHandles, ""); |
1711 oop singleKlass = wrong_method_type_is_for_single_argument(thread, required); | |
1793
d257356e35f0
6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
jrose
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1748
diff
changeset
|
1712 char* message = NULL; |
710 | 1713 if (singleKlass != NULL) { |
1714 const char* objName = "argument or return value"; | |
1715 if (actual != NULL) { | |
1716 // be flexible about the junk passed in: | |
1717 klassOop ak = (actual->is_klass() | |
1718 ? (klassOop)actual | |
1719 : actual->klass()); | |
1720 objName = Klass::cast(ak)->external_name(); | |
1721 } | |
1722 Klass* targetKlass = Klass::cast(required->is_klass() | |
1723 ? (klassOop)required | |
1724 : java_lang_Class::as_klassOop(required)); | |
1793
d257356e35f0
6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
jrose
parents:
1748
diff
changeset
|
1725 message = generate_class_cast_message(objName, targetKlass->external_name()); |
710 | 1726 } else { |
1727 // %%% need to get the MethodType string, without messing around too much | |
1728 // Get a signature from the invoke instruction | |
1729 const char* mhName = "method handle"; | |
1730 const char* targetType = "the required signature"; | |
1731 vframeStream vfst(thread, true); | |
1732 if (!vfst.at_end()) { | |
2142 | 1733 Bytecode_invoke call(vfst.method(), vfst.bci()); |
710 | 1734 methodHandle target; |
1735 { | |
1736 EXCEPTION_MARK; | |
2142 | 1737 target = call.static_target(THREAD); |
710 | 1738 if (HAS_PENDING_EXCEPTION) { CLEAR_PENDING_EXCEPTION; } |
1739 } | |
1740 if (target.not_null() | |
1741 && target->is_method_handle_invoke() | |
1742 && required == target->method_handle_type()) { | |
1743 targetType = target->signature()->as_C_string(); | |
1744 } | |
1745 } | |
1746 klassOop kignore; int fignore; | |
1747 methodOop actual_method = MethodHandles::decode_method(actual, | |
1748 kignore, fignore); | |
1749 if (actual_method != NULL) { | |
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1750 if (methodOopDesc::is_method_handle_invoke_name(actual_method->name())) |
710 | 1751 mhName = "$"; |
1752 else | |
1753 mhName = actual_method->signature()->as_C_string(); | |
1754 if (mhName[0] == '$') | |
1755 mhName = actual_method->signature()->as_C_string(); | |
1756 } | |
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1757 message = generate_class_cast_message(mhName, targetType, |
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1758 " cannot be called as "); |
710 | 1759 } |
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1760 if (TraceMethodHandles) { |
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1761 tty->print_cr("WrongMethodType => message=%s", message); |
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1762 } |
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1763 return message; |
710 | 1764 } |
1765 | |
1766 oop SharedRuntime::wrong_method_type_is_for_single_argument(JavaThread* thr, | |
1767 oopDesc* required) { | |
1768 if (required == NULL) return NULL; | |
1142 | 1769 if (required->klass() == SystemDictionary::Class_klass()) |
710 | 1770 return required; |
1771 if (required->is_klass()) | |
1772 return Klass::cast(klassOop(required))->java_mirror(); | |
1773 return NULL; | |
1774 } | |
1775 | |
1776 | |
0 | 1777 char* SharedRuntime::generate_class_cast_message( |
710 | 1778 const char* objName, const char* targetKlassName, const char* desc) { |
0 | 1779 size_t msglen = strlen(objName) + strlen(desc) + strlen(targetKlassName) + 1; |
1780 | |
53 | 1781 char* message = NEW_RESOURCE_ARRAY(char, msglen); |
0 | 1782 if (NULL == message) { |
53 | 1783 // Shouldn't happen, but don't cause even more problems if it does |
0 | 1784 message = const_cast<char*>(objName); |
1785 } else { | |
1786 jio_snprintf(message, msglen, "%s%s%s", objName, desc, targetKlassName); | |
1787 } | |
1788 return message; | |
1789 } | |
1790 | |
1791 JRT_LEAF(void, SharedRuntime::reguard_yellow_pages()) | |
1792 (void) JavaThread::current()->reguard_stack(); | |
1793 JRT_END | |
1794 | |
1795 | |
1796 // Handles the uncommon case in locking, i.e., contention or an inflated lock. | |
1797 #ifndef PRODUCT | |
1798 int SharedRuntime::_monitor_enter_ctr=0; | |
1799 #endif | |
1800 JRT_ENTRY_NO_ASYNC(void, SharedRuntime::complete_monitor_locking_C(oopDesc* _obj, BasicLock* lock, JavaThread* thread)) | |
1801 oop obj(_obj); | |
1802 #ifndef PRODUCT | |
1803 _monitor_enter_ctr++; // monitor enter slow | |
1804 #endif | |
1805 if (PrintBiasedLockingStatistics) { | |
1806 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); | |
1807 } | |
1808 Handle h_obj(THREAD, obj); | |
1809 if (UseBiasedLocking) { | |
1810 // Retry fast entry if bias is revoked to avoid unnecessary inflation | |
1811 ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK); | |
1812 } else { | |
1813 ObjectSynchronizer::slow_enter(h_obj, lock, CHECK); | |
1814 } | |
1815 assert(!HAS_PENDING_EXCEPTION, "Should have no exception here"); | |
1816 JRT_END | |
1817 | |
1818 #ifndef PRODUCT | |
1819 int SharedRuntime::_monitor_exit_ctr=0; | |
1820 #endif | |
1821 // Handles the uncommon cases of monitor unlocking in compiled code | |
1822 JRT_LEAF(void, SharedRuntime::complete_monitor_unlocking_C(oopDesc* _obj, BasicLock* lock)) | |
1823 oop obj(_obj); | |
1824 #ifndef PRODUCT | |
1825 _monitor_exit_ctr++; // monitor exit slow | |
1826 #endif | |
1827 Thread* THREAD = JavaThread::current(); | |
1828 // I'm not convinced we need the code contained by MIGHT_HAVE_PENDING anymore | |
1829 // testing was unable to ever fire the assert that guarded it so I have removed it. | |
1830 assert(!HAS_PENDING_EXCEPTION, "Do we need code below anymore?"); | |
1831 #undef MIGHT_HAVE_PENDING | |
1832 #ifdef MIGHT_HAVE_PENDING | |
1833 // Save and restore any pending_exception around the exception mark. | |
1834 // While the slow_exit must not throw an exception, we could come into | |
1835 // this routine with one set. | |
1836 oop pending_excep = NULL; | |
1837 const char* pending_file; | |
1838 int pending_line; | |
1839 if (HAS_PENDING_EXCEPTION) { | |
1840 pending_excep = PENDING_EXCEPTION; | |
1841 pending_file = THREAD->exception_file(); | |
1842 pending_line = THREAD->exception_line(); | |
1843 CLEAR_PENDING_EXCEPTION; | |
1844 } | |
1845 #endif /* MIGHT_HAVE_PENDING */ | |
1846 | |
1847 { | |
1848 // Exit must be non-blocking, and therefore no exceptions can be thrown. | |
1849 EXCEPTION_MARK; | |
1850 ObjectSynchronizer::slow_exit(obj, lock, THREAD); | |
1851 } | |
1852 | |
1853 #ifdef MIGHT_HAVE_PENDING | |
1854 if (pending_excep != NULL) { | |
1855 THREAD->set_pending_exception(pending_excep, pending_file, pending_line); | |
1856 } | |
1857 #endif /* MIGHT_HAVE_PENDING */ | |
1858 JRT_END | |
1859 | |
1860 #ifndef PRODUCT | |
1861 | |
1862 void SharedRuntime::print_statistics() { | |
1863 ttyLocker ttyl; | |
1864 if (xtty != NULL) xtty->head("statistics type='SharedRuntime'"); | |
1865 | |
1866 if (_monitor_enter_ctr ) tty->print_cr("%5d monitor enter slow", _monitor_enter_ctr); | |
1867 if (_monitor_exit_ctr ) tty->print_cr("%5d monitor exit slow", _monitor_exit_ctr); | |
1868 if (_throw_null_ctr) tty->print_cr("%5d implicit null throw", _throw_null_ctr); | |
1869 | |
1870 SharedRuntime::print_ic_miss_histogram(); | |
1871 | |
1872 if (CountRemovableExceptions) { | |
1873 if (_nof_removable_exceptions > 0) { | |
1874 Unimplemented(); // this counter is not yet incremented | |
1875 tty->print_cr("Removable exceptions: %d", _nof_removable_exceptions); | |
1876 } | |
1877 } | |
1878 | |
1879 // Dump the JRT_ENTRY counters | |
1880 if( _new_instance_ctr ) tty->print_cr("%5d new instance requires GC", _new_instance_ctr); | |
1881 if( _new_array_ctr ) tty->print_cr("%5d new array requires GC", _new_array_ctr); | |
1882 if( _multi1_ctr ) tty->print_cr("%5d multianewarray 1 dim", _multi1_ctr); | |
1883 if( _multi2_ctr ) tty->print_cr("%5d multianewarray 2 dim", _multi2_ctr); | |
1884 if( _multi3_ctr ) tty->print_cr("%5d multianewarray 3 dim", _multi3_ctr); | |
1885 if( _multi4_ctr ) tty->print_cr("%5d multianewarray 4 dim", _multi4_ctr); | |
1886 if( _multi5_ctr ) tty->print_cr("%5d multianewarray 5 dim", _multi5_ctr); | |
1887 | |
1888 tty->print_cr("%5d inline cache miss in compiled", _ic_miss_ctr ); | |
1889 tty->print_cr("%5d wrong method", _wrong_method_ctr ); | |
1890 tty->print_cr("%5d unresolved static call site", _resolve_static_ctr ); | |
1891 tty->print_cr("%5d unresolved virtual call site", _resolve_virtual_ctr ); | |
1892 tty->print_cr("%5d unresolved opt virtual call site", _resolve_opt_virtual_ctr ); | |
1893 | |
1894 if( _mon_enter_stub_ctr ) tty->print_cr("%5d monitor enter stub", _mon_enter_stub_ctr ); | |
1895 if( _mon_exit_stub_ctr ) tty->print_cr("%5d monitor exit stub", _mon_exit_stub_ctr ); | |
1896 if( _mon_enter_ctr ) tty->print_cr("%5d monitor enter slow", _mon_enter_ctr ); | |
1897 if( _mon_exit_ctr ) tty->print_cr("%5d monitor exit slow", _mon_exit_ctr ); | |
1898 if( _partial_subtype_ctr) tty->print_cr("%5d slow partial subtype", _partial_subtype_ctr ); | |
1899 if( _jbyte_array_copy_ctr ) tty->print_cr("%5d byte array copies", _jbyte_array_copy_ctr ); | |
1900 if( _jshort_array_copy_ctr ) tty->print_cr("%5d short array copies", _jshort_array_copy_ctr ); | |
1901 if( _jint_array_copy_ctr ) tty->print_cr("%5d int array copies", _jint_array_copy_ctr ); | |
1902 if( _jlong_array_copy_ctr ) tty->print_cr("%5d long array copies", _jlong_array_copy_ctr ); | |
1903 if( _oop_array_copy_ctr ) tty->print_cr("%5d oop array copies", _oop_array_copy_ctr ); | |
1904 if( _checkcast_array_copy_ctr ) tty->print_cr("%5d checkcast array copies", _checkcast_array_copy_ctr ); | |
1905 if( _unsafe_array_copy_ctr ) tty->print_cr("%5d unsafe array copies", _unsafe_array_copy_ctr ); | |
1906 if( _generic_array_copy_ctr ) tty->print_cr("%5d generic array copies", _generic_array_copy_ctr ); | |
1907 if( _slow_array_copy_ctr ) tty->print_cr("%5d slow array copies", _slow_array_copy_ctr ); | |
1908 if( _find_handler_ctr ) tty->print_cr("%5d find exception handler", _find_handler_ctr ); | |
1909 if( _rethrow_ctr ) tty->print_cr("%5d rethrow handler", _rethrow_ctr ); | |
1910 | |
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1911 AdapterHandlerLibrary::print_statistics(); |
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1912 |
0 | 1913 if (xtty != NULL) xtty->tail("statistics"); |
1914 } | |
1915 | |
1916 inline double percent(int x, int y) { | |
1917 return 100.0 * x / MAX2(y, 1); | |
1918 } | |
1919 | |
1920 class MethodArityHistogram { | |
1921 public: | |
1922 enum { MAX_ARITY = 256 }; | |
1923 private: | |
1924 static int _arity_histogram[MAX_ARITY]; // histogram of #args | |
1925 static int _size_histogram[MAX_ARITY]; // histogram of arg size in words | |
1926 static int _max_arity; // max. arity seen | |
1927 static int _max_size; // max. arg size seen | |
1928 | |
1929 static void add_method_to_histogram(nmethod* nm) { | |
1930 methodOop m = nm->method(); | |
1931 ArgumentCount args(m->signature()); | |
1932 int arity = args.size() + (m->is_static() ? 0 : 1); | |
1933 int argsize = m->size_of_parameters(); | |
1934 arity = MIN2(arity, MAX_ARITY-1); | |
1935 argsize = MIN2(argsize, MAX_ARITY-1); | |
1936 int count = nm->method()->compiled_invocation_count(); | |
1937 _arity_histogram[arity] += count; | |
1938 _size_histogram[argsize] += count; | |
1939 _max_arity = MAX2(_max_arity, arity); | |
1940 _max_size = MAX2(_max_size, argsize); | |
1941 } | |
1942 | |
1943 void print_histogram_helper(int n, int* histo, const char* name) { | |
1944 const int N = MIN2(5, n); | |
1945 tty->print_cr("\nHistogram of call arity (incl. rcvr, calls to compiled methods only):"); | |
1946 double sum = 0; | |
1947 double weighted_sum = 0; | |
1948 int i; | |
1949 for (i = 0; i <= n; i++) { sum += histo[i]; weighted_sum += i*histo[i]; } | |
1950 double rest = sum; | |
1951 double percent = sum / 100; | |
1952 for (i = 0; i <= N; i++) { | |
1953 rest -= histo[i]; | |
1954 tty->print_cr("%4d: %7d (%5.1f%%)", i, histo[i], histo[i] / percent); | |
1955 } | |
1956 tty->print_cr("rest: %7d (%5.1f%%))", (int)rest, rest / percent); | |
1957 tty->print_cr("(avg. %s = %3.1f, max = %d)", name, weighted_sum / sum, n); | |
1958 } | |
1959 | |
1960 void print_histogram() { | |
1961 tty->print_cr("\nHistogram of call arity (incl. rcvr, calls to compiled methods only):"); | |
1962 print_histogram_helper(_max_arity, _arity_histogram, "arity"); | |
1963 tty->print_cr("\nSame for parameter size (in words):"); | |
1964 print_histogram_helper(_max_size, _size_histogram, "size"); | |
1965 tty->cr(); | |
1966 } | |
1967 | |
1968 public: | |
1969 MethodArityHistogram() { | |
1970 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
1971 _max_arity = _max_size = 0; | |
1972 for (int i = 0; i < MAX_ARITY; i++) _arity_histogram[i] = _size_histogram [i] = 0; | |
1973 CodeCache::nmethods_do(add_method_to_histogram); | |
1974 print_histogram(); | |
1975 } | |
1976 }; | |
1977 | |
1978 int MethodArityHistogram::_arity_histogram[MethodArityHistogram::MAX_ARITY]; | |
1979 int MethodArityHistogram::_size_histogram[MethodArityHistogram::MAX_ARITY]; | |
1980 int MethodArityHistogram::_max_arity; | |
1981 int MethodArityHistogram::_max_size; | |
1982 | |
1983 void SharedRuntime::print_call_statistics(int comp_total) { | |
1984 tty->print_cr("Calls from compiled code:"); | |
1985 int total = _nof_normal_calls + _nof_interface_calls + _nof_static_calls; | |
1986 int mono_c = _nof_normal_calls - _nof_optimized_calls - _nof_megamorphic_calls; | |
1987 int mono_i = _nof_interface_calls - _nof_optimized_interface_calls - _nof_megamorphic_interface_calls; | |
1988 tty->print_cr("\t%9d (%4.1f%%) total non-inlined ", total, percent(total, total)); | |
1989 tty->print_cr("\t%9d (%4.1f%%) virtual calls ", _nof_normal_calls, percent(_nof_normal_calls, total)); | |
1990 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_calls, percent(_nof_inlined_calls, _nof_normal_calls)); | |
1991 tty->print_cr("\t %9d (%3.0f%%) optimized ", _nof_optimized_calls, percent(_nof_optimized_calls, _nof_normal_calls)); | |
1992 tty->print_cr("\t %9d (%3.0f%%) monomorphic ", mono_c, percent(mono_c, _nof_normal_calls)); | |
1993 tty->print_cr("\t %9d (%3.0f%%) megamorphic ", _nof_megamorphic_calls, percent(_nof_megamorphic_calls, _nof_normal_calls)); | |
1994 tty->print_cr("\t%9d (%4.1f%%) interface calls ", _nof_interface_calls, percent(_nof_interface_calls, total)); | |
1995 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_interface_calls, percent(_nof_inlined_interface_calls, _nof_interface_calls)); | |
1996 tty->print_cr("\t %9d (%3.0f%%) optimized ", _nof_optimized_interface_calls, percent(_nof_optimized_interface_calls, _nof_interface_calls)); | |
1997 tty->print_cr("\t %9d (%3.0f%%) monomorphic ", mono_i, percent(mono_i, _nof_interface_calls)); | |
1998 tty->print_cr("\t %9d (%3.0f%%) megamorphic ", _nof_megamorphic_interface_calls, percent(_nof_megamorphic_interface_calls, _nof_interface_calls)); | |
1999 tty->print_cr("\t%9d (%4.1f%%) static/special calls", _nof_static_calls, percent(_nof_static_calls, total)); | |
2000 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_static_calls, percent(_nof_inlined_static_calls, _nof_static_calls)); | |
2001 tty->cr(); | |
2002 tty->print_cr("Note 1: counter updates are not MT-safe."); | |
2003 tty->print_cr("Note 2: %% in major categories are relative to total non-inlined calls;"); | |
2004 tty->print_cr(" %% in nested categories are relative to their category"); | |
2005 tty->print_cr(" (and thus add up to more than 100%% with inlining)"); | |
2006 tty->cr(); | |
2007 | |
2008 MethodArityHistogram h; | |
2009 } | |
2010 #endif | |
2011 | |
2012 | |
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2013 // A simple wrapper class around the calling convention information |
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2014 // that allows sharing of adapters for the same calling convention. |
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2015 class AdapterFingerPrint : public CHeapObj { |
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2016 private: |
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2017 union { |
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2018 int _compact[3]; |
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2019 int* _fingerprint; |
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2020 } _value; |
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2021 int _length; // A negative length indicates the fingerprint is in the compact form, |
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2022 // Otherwise _value._fingerprint is the array. |
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2023 |
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2024 // Remap BasicTypes that are handled equivalently by the adapters. |
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2025 // These are correct for the current system but someday it might be |
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2026 // necessary to make this mapping platform dependent. |
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2027 static BasicType adapter_encoding(BasicType in) { |
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2028 assert((~0xf & in) == 0, "must fit in 4 bits"); |
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2029 switch(in) { |
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2030 case T_BOOLEAN: |
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2031 case T_BYTE: |
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2032 case T_SHORT: |
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2033 case T_CHAR: |
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2034 // There are all promoted to T_INT in the calling convention |
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2035 return T_INT; |
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2036 |
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2037 case T_OBJECT: |
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2038 case T_ARRAY: |
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2039 #ifdef _LP64 |
1506 | 2040 return T_LONG; |
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2041 #else |
1506 | 2042 return T_INT; |
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2043 #endif |
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2044 |
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2045 case T_INT: |
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2046 case T_LONG: |
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2047 case T_FLOAT: |
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2048 case T_DOUBLE: |
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6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2049 case T_VOID: |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2050 return in; |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2051 |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2052 default: |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2053 ShouldNotReachHere(); |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2054 return T_CONFLICT; |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2055 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2056 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2057 |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2058 public: |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2059 AdapterFingerPrint(int total_args_passed, BasicType* sig_bt) { |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2060 // The fingerprint is based on the BasicType signature encoded |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2061 // into an array of ints with four entries per int. |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2062 int* ptr; |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2063 int len = (total_args_passed + 3) >> 2; |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2064 if (len <= (int)(sizeof(_value._compact) / sizeof(int))) { |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2065 _value._compact[0] = _value._compact[1] = _value._compact[2] = 0; |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2066 // Storing the signature encoded as signed chars hits about 98% |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2067 // of the time. |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2068 _length = -len; |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2069 ptr = _value._compact; |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2070 } else { |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2071 _length = len; |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2072 _value._fingerprint = NEW_C_HEAP_ARRAY(int, _length); |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2073 ptr = _value._fingerprint; |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2074 } |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2075 |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2076 // Now pack the BasicTypes with 4 per int |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2077 int sig_index = 0; |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2078 for (int index = 0; index < len; index++) { |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2079 int value = 0; |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2080 for (int byte = 0; byte < 4; byte++) { |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2081 if (sig_index < total_args_passed) { |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2082 value = (value << 4) | adapter_encoding(sig_bt[sig_index++]); |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2083 } |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2084 } |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2085 ptr[index] = value; |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2086 } |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2087 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2088 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2089 ~AdapterFingerPrint() { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2090 if (_length > 0) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2091 FREE_C_HEAP_ARRAY(int, _value._fingerprint); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2092 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2093 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2094 |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2095 int value(int index) { |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2096 if (_length < 0) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2097 return _value._compact[index]; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2098 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2099 return _value._fingerprint[index]; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2100 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2101 int length() { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2102 if (_length < 0) return -_length; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2103 return _length; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2104 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2105 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2106 bool is_compact() { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2107 return _length <= 0; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2108 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2109 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2110 unsigned int compute_hash() { |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2111 int hash = 0; |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2112 for (int i = 0; i < length(); i++) { |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2113 int v = value(i); |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2114 hash = (hash << 8) ^ v ^ (hash >> 5); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2115 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2116 return (unsigned int)hash; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2117 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2118 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2119 const char* as_string() { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2120 stringStream st; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2121 for (int i = 0; i < length(); i++) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2122 st.print(PTR_FORMAT, value(i)); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2123 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2124 return st.as_string(); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2125 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2126 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2127 bool equals(AdapterFingerPrint* other) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2128 if (other->_length != _length) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2129 return false; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2130 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2131 if (_length < 0) { |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2132 return _value._compact[0] == other->_value._compact[0] && |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2133 _value._compact[1] == other->_value._compact[1] && |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2134 _value._compact[2] == other->_value._compact[2]; |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2135 } else { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2136 for (int i = 0; i < _length; i++) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2137 if (_value._fingerprint[i] != other->_value._fingerprint[i]) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2138 return false; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2139 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2140 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2141 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2142 return true; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2143 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2144 }; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2145 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2146 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2147 // A hashtable mapping from AdapterFingerPrints to AdapterHandlerEntries |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2148 class AdapterHandlerTable : public BasicHashtable { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2149 friend class AdapterHandlerTableIterator; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2150 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2151 private: |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2152 |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
diff
changeset
|
2153 #ifndef PRODUCT |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2154 static int _lookups; // number of calls to lookup |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2155 static int _buckets; // number of buckets checked |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2156 static int _equals; // number of buckets checked with matching hash |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2157 static int _hits; // number of successful lookups |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2158 static int _compact; // number of equals calls with compact signature |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2159 #endif |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2160 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2161 AdapterHandlerEntry* bucket(int i) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2162 return (AdapterHandlerEntry*)BasicHashtable::bucket(i); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2163 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2164 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2165 public: |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2166 AdapterHandlerTable() |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2167 : BasicHashtable(293, sizeof(AdapterHandlerEntry)) { } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2168 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2169 // Create a new entry suitable for insertion in the table |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2170 AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2171 AdapterHandlerEntry* entry = (AdapterHandlerEntry*)BasicHashtable::new_entry(fingerprint->compute_hash()); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2172 entry->init(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2173 return entry; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2174 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2175 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2176 // Insert an entry into the table |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2177 void add(AdapterHandlerEntry* entry) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2178 int index = hash_to_index(entry->hash()); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2179 add_entry(index, entry); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2180 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2181 |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2182 void free_entry(AdapterHandlerEntry* entry) { |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2183 entry->deallocate(); |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2184 BasicHashtable::free_entry(entry); |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
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2185 } |
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|
2186 |
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|
2187 // Find a entry with the same fingerprint if it exists |
1207
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2188 AdapterHandlerEntry* lookup(int total_args_passed, BasicType* sig_bt) { |
1263
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2189 NOT_PRODUCT(_lookups++); |
1207
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|
2190 AdapterFingerPrint fp(total_args_passed, sig_bt); |
1187
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|
2191 unsigned int hash = fp.compute_hash(); |
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|
2192 int index = hash_to_index(hash); |
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|
2193 for (AdapterHandlerEntry* e = bucket(index); e != NULL; e = e->next()) { |
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2194 NOT_PRODUCT(_buckets++); |
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2195 if (e->hash() == hash) { |
1263
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|
2196 NOT_PRODUCT(_equals++); |
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2197 if (fp.equals(e->fingerprint())) { |
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2198 #ifndef PRODUCT |
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2199 if (fp.is_compact()) _compact++; |
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2200 _hits++; |
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|
2201 #endif |
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|
2202 return e; |
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|
2203 } |
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|
2204 } |
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|
2205 } |
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|
2206 return NULL; |
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|
2207 } |
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2208 |
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2209 #ifndef PRODUCT |
1187
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2210 void print_statistics() { |
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|
2211 ResourceMark rm; |
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|
2212 int longest = 0; |
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|
2213 int empty = 0; |
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|
2214 int total = 0; |
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|
2215 int nonempty = 0; |
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2216 for (int index = 0; index < table_size(); index++) { |
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2217 int count = 0; |
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2218 for (AdapterHandlerEntry* e = bucket(index); e != NULL; e = e->next()) { |
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2219 count++; |
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|
2220 } |
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|
2221 if (count != 0) nonempty++; |
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2222 if (count == 0) empty++; |
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|
2223 if (count > longest) longest = count; |
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|
2224 total += count; |
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|
2225 } |
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2226 tty->print_cr("AdapterHandlerTable: empty %d longest %d total %d average %f", |
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2227 empty, longest, total, total / (double)nonempty); |
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2228 tty->print_cr("AdapterHandlerTable: lookups %d buckets %d equals %d hits %d compact %d", |
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2229 _lookups, _buckets, _equals, _hits, _compact); |
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2230 } |
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2231 #endif |
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2232 }; |
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2233 |
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2234 |
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|
2235 #ifndef PRODUCT |
1187
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|
2236 |
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2237 int AdapterHandlerTable::_lookups; |
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|
2238 int AdapterHandlerTable::_buckets; |
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|
2239 int AdapterHandlerTable::_equals; |
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|
2240 int AdapterHandlerTable::_hits; |
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|
2241 int AdapterHandlerTable::_compact; |
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|
2242 |
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2243 #endif |
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|
2244 |
1187
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2245 class AdapterHandlerTableIterator : public StackObj { |
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|
2246 private: |
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|
2247 AdapterHandlerTable* _table; |
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|
2248 int _index; |
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|
2249 AdapterHandlerEntry* _current; |
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|
2250 |
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|
2251 void scan() { |
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2252 while (_index < _table->table_size()) { |
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|
2253 AdapterHandlerEntry* a = _table->bucket(_index); |
1564 | 2254 _index++; |
1187
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2255 if (a != NULL) { |
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2256 _current = a; |
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|
2257 return; |
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|
2258 } |
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2259 } |
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2260 } |
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|
2261 |
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|
2262 public: |
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|
2263 AdapterHandlerTableIterator(AdapterHandlerTable* table): _table(table), _index(0), _current(NULL) { |
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2264 scan(); |
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|
2265 } |
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|
2266 bool has_next() { |
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|
2267 return _current != NULL; |
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|
2268 } |
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|
2269 AdapterHandlerEntry* next() { |
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|
2270 if (_current != NULL) { |
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|
2271 AdapterHandlerEntry* result = _current; |
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|
2272 _current = _current->next(); |
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2273 if (_current == NULL) scan(); |
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|
2274 return result; |
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|
2275 } else { |
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|
2276 return NULL; |
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|
2277 } |
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|
2278 } |
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|
2279 }; |
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|
2280 |
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|
2281 |
0 | 2282 // --------------------------------------------------------------------------- |
2283 // Implementation of AdapterHandlerLibrary | |
1187
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|
2284 AdapterHandlerTable* AdapterHandlerLibrary::_adapters = NULL; |
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2285 AdapterHandlerEntry* AdapterHandlerLibrary::_abstract_method_handler = NULL; |
0 | 2286 const int AdapterHandlerLibrary_size = 16*K; |
742
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2287 BufferBlob* AdapterHandlerLibrary::_buffer = NULL; |
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|
2288 |
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2289 BufferBlob* AdapterHandlerLibrary::buffer_blob() { |
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2290 // Should be called only when AdapterHandlerLibrary_lock is active. |
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2291 if (_buffer == NULL) // Initialize lazily |
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2292 _buffer = BufferBlob::create("adapters", AdapterHandlerLibrary_size); |
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2293 return _buffer; |
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|
2294 } |
0 | 2295 |
2296 void AdapterHandlerLibrary::initialize() { | |
1187
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2297 if (_adapters != NULL) return; |
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|
2298 _adapters = new AdapterHandlerTable(); |
0 | 2299 |
2300 // Create a special handler for abstract methods. Abstract methods | |
2301 // are never compiled so an i2c entry is somewhat meaningless, but | |
2302 // fill it in with something appropriate just in case. Pass handle | |
2303 // wrong method for the c2i transitions. | |
2304 address wrong_method = SharedRuntime::get_handle_wrong_method_stub(); | |
1187
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2305 _abstract_method_handler = AdapterHandlerLibrary::new_entry(new AdapterFingerPrint(0, NULL), |
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|
2306 StubRoutines::throw_AbstractMethodError_entry(), |
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|
2307 wrong_method, wrong_method); |
0 | 2308 } |
2309 | |
1187
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2310 AdapterHandlerEntry* AdapterHandlerLibrary::new_entry(AdapterFingerPrint* fingerprint, |
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|
2311 address i2c_entry, |
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|
2312 address c2i_entry, |
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|
2313 address c2i_unverified_entry) { |
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|
2314 return _adapters->new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
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2315 } |
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|
2316 |
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|
2317 AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(methodHandle method) { |
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2318 // Use customized signature handler. Need to lock around updates to |
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2319 // the AdapterHandlerTable (it is not safe for concurrent readers |
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2320 // and a single writer: this could be fixed if it becomes a |
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|
2321 // problem). |
0 | 2322 |
2323 // Get the address of the ic_miss handlers before we grab the | |
2324 // AdapterHandlerLibrary_lock. This fixes bug 6236259 which | |
2325 // was caused by the initialization of the stubs happening | |
2326 // while we held the lock and then notifying jvmti while | |
2327 // holding it. This just forces the initialization to be a little | |
2328 // earlier. | |
2329 address ic_miss = SharedRuntime::get_ic_miss_stub(); | |
2330 assert(ic_miss != NULL, "must have handler"); | |
2331 | |
1187
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|
2332 ResourceMark rm; |
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|
2333 |
1748 | 2334 NOT_PRODUCT(int insts_size); |
1299
9eba43136cb5
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|
2335 AdapterBlob* B = NULL; |
742
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2336 AdapterHandlerEntry* entry = NULL; |
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2337 AdapterFingerPrint* fingerprint = NULL; |
0 | 2338 { |
2339 MutexLocker mu(AdapterHandlerLibrary_lock); | |
2340 // make sure data structure is initialized | |
2341 initialize(); | |
2342 | |
2343 if (method->is_abstract()) { | |
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2344 return _abstract_method_handler; |
0 | 2345 } |
2346 | |
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2347 // Fill in the signature array, for the calling-convention call. |
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2348 int total_args_passed = method->size_of_parameters(); // All args on stack |
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2349 |
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2350 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed); |
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2351 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed); |
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2352 int i = 0; |
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2353 if (!method->is_static()) // Pass in receiver first |
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2354 sig_bt[i++] = T_OBJECT; |
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2355 for (SignatureStream ss(method->signature()); !ss.at_return_type(); ss.next()) { |
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2356 sig_bt[i++] = ss.type(); // Collect remaining bits of signature |
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2357 if (ss.type() == T_LONG || ss.type() == T_DOUBLE) |
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2358 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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2359 } |
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2360 assert(i == total_args_passed, ""); |
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2361 |
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2362 // Lookup method signature's fingerprint |
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2363 entry = _adapters->lookup(total_args_passed, sig_bt); |
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2364 |
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2365 #ifdef ASSERT |
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2366 AdapterHandlerEntry* shared_entry = NULL; |
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2367 if (VerifyAdapterSharing && entry != NULL) { |
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2368 shared_entry = entry; |
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2369 entry = NULL; |
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2370 } |
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2371 #endif |
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2372 |
1187
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2373 if (entry != NULL) { |
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2374 return entry; |
0 | 2375 } |
2376 | |
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2377 // Get a description of the compiled java calling convention and the largest used (VMReg) stack slot usage |
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2378 int comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed, false); |
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2379 |
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2380 // Make a C heap allocated version of the fingerprint to store in the adapter |
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2381 fingerprint = new AdapterFingerPrint(total_args_passed, sig_bt); |
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2382 |
0 | 2383 // Create I2C & C2I handlers |
2384 | |
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2385 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
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2386 if (buf != NULL) { |
1748 | 2387 CodeBuffer buffer(buf); |
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2388 short buffer_locs[20]; |
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2389 buffer.insts()->initialize_shared_locs((relocInfo*)buffer_locs, |
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2390 sizeof(buffer_locs)/sizeof(relocInfo)); |
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2391 MacroAssembler _masm(&buffer); |
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2392 |
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2393 entry = SharedRuntime::generate_i2c2i_adapters(&_masm, |
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2394 total_args_passed, |
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2395 comp_args_on_stack, |
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2396 sig_bt, |
1187
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2397 regs, |
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2398 fingerprint); |
0 | 2399 |
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2400 #ifdef ASSERT |
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2401 if (VerifyAdapterSharing) { |
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2402 if (shared_entry != NULL) { |
1748 | 2403 assert(shared_entry->compare_code(buf->code_begin(), buffer.insts_size(), total_args_passed, sig_bt), |
1207
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2404 "code must match"); |
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2405 // Release the one just created and return the original |
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2406 _adapters->free_entry(entry); |
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2407 return shared_entry; |
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2408 } else { |
1748 | 2409 entry->save_code(buf->code_begin(), buffer.insts_size(), total_args_passed, sig_bt); |
1207
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2410 } |
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2411 } |
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2412 #endif |
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2413 |
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2414 B = AdapterBlob::create(&buffer); |
1748 | 2415 NOT_PRODUCT(insts_size = buffer.insts_size()); |
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2416 } |
28 | 2417 if (B == NULL) { |
2418 // CodeCache is full, disable compilation | |
2419 // Ought to log this but compile log is only per compile thread | |
2420 // and we're some non descript Java thread. | |
1202 | 2421 MutexUnlocker mu(AdapterHandlerLibrary_lock); |
2422 CompileBroker::handle_full_code_cache(); | |
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2423 return NULL; // Out of CodeCache space |
28 | 2424 } |
1748 | 2425 entry->relocate(B->content_begin()); |
0 | 2426 #ifndef PRODUCT |
2427 // debugging suppport | |
2428 if (PrintAdapterHandlers) { | |
2429 tty->cr(); | |
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2430 tty->print_cr("i2c argument handler #%d for: %s %s (fingerprint = %s, %d bytes generated)", |
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2431 _adapters->number_of_entries(), (method->is_static() ? "static" : "receiver"), |
1748 | 2432 method->signature()->as_C_string(), fingerprint->as_string(), insts_size ); |
0 | 2433 tty->print_cr("c2i argument handler starts at %p",entry->get_c2i_entry()); |
1748 | 2434 Disassembler::decode(entry->get_i2c_entry(), entry->get_i2c_entry() + insts_size); |
0 | 2435 } |
2436 #endif | |
2437 | |
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2438 _adapters->add(entry); |
0 | 2439 } |
2440 // Outside of the lock | |
2441 if (B != NULL) { | |
2442 char blob_id[256]; | |
2443 jio_snprintf(blob_id, | |
2444 sizeof(blob_id), | |
1187
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2445 "%s(%s)@" PTR_FORMAT, |
1299
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2446 B->name(), |
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2447 fingerprint->as_string(), |
1748 | 2448 B->content_begin()); |
2449 Forte::register_stub(blob_id, B->content_begin(), B->content_end()); | |
0 | 2450 |
2451 if (JvmtiExport::should_post_dynamic_code_generated()) { | |
1748 | 2452 JvmtiExport::post_dynamic_code_generated(blob_id, B->content_begin(), B->content_end()); |
0 | 2453 } |
2454 } | |
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2455 return entry; |
0 | 2456 } |
2457 | |
2458 void AdapterHandlerEntry::relocate(address new_base) { | |
2459 ptrdiff_t delta = new_base - _i2c_entry; | |
2460 _i2c_entry += delta; | |
2461 _c2i_entry += delta; | |
2462 _c2i_unverified_entry += delta; | |
2463 } | |
2464 | |
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2465 |
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2466 void AdapterHandlerEntry::deallocate() { |
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2467 delete _fingerprint; |
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2468 #ifdef ASSERT |
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2469 if (_saved_code) FREE_C_HEAP_ARRAY(unsigned char, _saved_code); |
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2470 if (_saved_sig) FREE_C_HEAP_ARRAY(Basictype, _saved_sig); |
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2471 #endif |
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2472 } |
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2473 |
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2474 |
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2475 #ifdef ASSERT |
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2476 // Capture the code before relocation so that it can be compared |
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2477 // against other versions. If the code is captured after relocation |
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2478 // then relative instructions won't be equivalent. |
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2479 void AdapterHandlerEntry::save_code(unsigned char* buffer, int length, int total_args_passed, BasicType* sig_bt) { |
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2480 _saved_code = NEW_C_HEAP_ARRAY(unsigned char, length); |
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2481 _code_length = length; |
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2482 memcpy(_saved_code, buffer, length); |
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2483 _total_args_passed = total_args_passed; |
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2484 _saved_sig = NEW_C_HEAP_ARRAY(BasicType, _total_args_passed); |
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2485 memcpy(_saved_sig, sig_bt, _total_args_passed * sizeof(BasicType)); |
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2486 } |
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2487 |
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2488 |
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2489 bool AdapterHandlerEntry::compare_code(unsigned char* buffer, int length, int total_args_passed, BasicType* sig_bt) { |
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2490 if (length != _code_length) { |
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2491 return false; |
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|
2492 } |
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2493 for (int i = 0; i < length; i++) { |
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2494 if (buffer[i] != _saved_code[i]) { |
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2495 return false; |
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2496 } |
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2497 } |
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2498 return true; |
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2499 } |
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2500 #endif |
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2501 |
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2502 |
0 | 2503 // Create a native wrapper for this native method. The wrapper converts the |
2504 // java compiled calling convention to the native convention, handlizes | |
2505 // arguments, and transitions to native. On return from the native we transition | |
2506 // back to java blocking if a safepoint is in progress. | |
2507 nmethod *AdapterHandlerLibrary::create_native_wrapper(methodHandle method) { | |
2508 ResourceMark rm; | |
2509 nmethod* nm = NULL; | |
2510 | |
2511 if (PrintCompilation) { | |
2512 ttyLocker ttyl; | |
2513 tty->print("--- n%s ", (method->is_synchronized() ? "s" : " ")); | |
2514 method->print_short_name(tty); | |
2515 if (method->is_static()) { | |
2516 tty->print(" (static)"); | |
2517 } | |
2518 tty->cr(); | |
2519 } | |
2520 | |
2521 assert(method->has_native_function(), "must have something valid to call!"); | |
2522 | |
2523 { | |
2524 // perform the work while holding the lock, but perform any printing outside the lock | |
2525 MutexLocker mu(AdapterHandlerLibrary_lock); | |
2526 // See if somebody beat us to it | |
2527 nm = method->code(); | |
2528 if (nm) { | |
2529 return nm; | |
2530 } | |
2531 | |
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2532 ResourceMark rm; |
0 | 2533 |
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2534 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
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2535 if (buf != NULL) { |
1748 | 2536 CodeBuffer buffer(buf); |
742
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2537 double locs_buf[20]; |
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2538 buffer.insts()->initialize_shared_locs((relocInfo*)locs_buf, sizeof(locs_buf) / sizeof(relocInfo)); |
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2539 MacroAssembler _masm(&buffer); |
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2540 |
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2541 // Fill in the signature array, for the calling-convention call. |
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2542 int total_args_passed = method->size_of_parameters(); |
0 | 2543 |
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2544 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType,total_args_passed); |
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2545 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair,total_args_passed); |
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2546 int i=0; |
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2547 if( !method->is_static() ) // Pass in receiver first |
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2548 sig_bt[i++] = T_OBJECT; |
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2549 SignatureStream ss(method->signature()); |
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2550 for( ; !ss.at_return_type(); ss.next()) { |
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2551 sig_bt[i++] = ss.type(); // Collect remaining bits of signature |
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2552 if( ss.type() == T_LONG || ss.type() == T_DOUBLE ) |
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2553 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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2554 } |
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2555 assert( i==total_args_passed, "" ); |
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2556 BasicType ret_type = ss.type(); |
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2557 |
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2558 // Now get the compiled-Java layout as input arguments |
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2559 int comp_args_on_stack; |
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2560 comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed, false); |
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2561 |
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2562 // Generate the compiled-to-native wrapper code |
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2563 nm = SharedRuntime::generate_native_wrapper(&_masm, |
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2564 method, |
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2565 total_args_passed, |
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2566 comp_args_on_stack, |
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2567 sig_bt,regs, |
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2568 ret_type); |
0 | 2569 } |
2570 } | |
2571 | |
2572 // Must unlock before calling set_code | |
1728
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2573 |
0 | 2574 // Install the generated code. |
2575 if (nm != NULL) { | |
2576 method->set_code(method, nm); | |
2577 nm->post_compiled_method_load_event(); | |
2578 } else { | |
2579 // CodeCache is full, disable compilation | |
1202 | 2580 CompileBroker::handle_full_code_cache(); |
0 | 2581 } |
2582 return nm; | |
2583 } | |
2584 | |
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2585 #ifdef HAVE_DTRACE_H |
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2586 // Create a dtrace nmethod for this method. The wrapper converts the |
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2587 // java compiled calling convention to the native convention, makes a dummy call |
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2588 // (actually nops for the size of the call instruction, which become a trap if |
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2589 // probe is enabled). The returns to the caller. Since this all looks like a |
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2590 // leaf no thread transition is needed. |
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2591 |
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2592 nmethod *AdapterHandlerLibrary::create_dtrace_nmethod(methodHandle method) { |
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2593 ResourceMark rm; |
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2594 nmethod* nm = NULL; |
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2595 |
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2596 if (PrintCompilation) { |
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2597 ttyLocker ttyl; |
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2598 tty->print("--- n%s "); |
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2599 method->print_short_name(tty); |
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2600 if (method->is_static()) { |
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2601 tty->print(" (static)"); |
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2602 } |
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2603 tty->cr(); |
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2604 } |
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2605 |
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2606 { |
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2607 // perform the work while holding the lock, but perform any printing |
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2608 // outside the lock |
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2609 MutexLocker mu(AdapterHandlerLibrary_lock); |
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2610 // See if somebody beat us to it |
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2611 nm = method->code(); |
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2612 if (nm) { |
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2613 return nm; |
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2614 } |
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2615 |
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2616 ResourceMark rm; |
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2617 |
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2618 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
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2619 if (buf != NULL) { |
1748 | 2620 CodeBuffer buffer(buf); |
742
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2621 // Need a few relocation entries |
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2622 double locs_buf[20]; |
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2623 buffer.insts()->initialize_shared_locs( |
116
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2624 (relocInfo*)locs_buf, sizeof(locs_buf) / sizeof(relocInfo)); |
742
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2625 MacroAssembler _masm(&buffer); |
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2626 |
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2627 // Generate the compiled-to-native wrapper code |
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2628 nm = SharedRuntime::generate_dtrace_nmethod(&_masm, method); |
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2629 } |
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2630 } |
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2631 return nm; |
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2632 } |
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2633 |
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2634 // the dtrace method needs to convert java lang string to utf8 string. |
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2635 void SharedRuntime::get_utf(oopDesc* src, address dst) { |
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2636 typeArrayOop jlsValue = java_lang_String::value(src); |
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2637 int jlsOffset = java_lang_String::offset(src); |
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2638 int jlsLen = java_lang_String::length(src); |
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2639 jchar* jlsPos = (jlsLen == 0) ? NULL : |
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2640 jlsValue->char_at_addr(jlsOffset); |
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2641 assert(typeArrayKlass::cast(jlsValue->klass())->element_type() == T_CHAR, "compressed string"); |
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2642 (void) UNICODE::as_utf8(jlsPos, jlsLen, (char *)dst, max_dtrace_string_size); |
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2643 } |
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2644 #endif // ndef HAVE_DTRACE_H |
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2645 |
0 | 2646 // ------------------------------------------------------------------------- |
2647 // Java-Java calling convention | |
2648 // (what you use when Java calls Java) | |
2649 | |
2650 //------------------------------name_for_receiver---------------------------------- | |
2651 // For a given signature, return the VMReg for parameter 0. | |
2652 VMReg SharedRuntime::name_for_receiver() { | |
2653 VMRegPair regs; | |
2654 BasicType sig_bt = T_OBJECT; | |
2655 (void) java_calling_convention(&sig_bt, ®s, 1, true); | |
2656 // Return argument 0 register. In the LP64 build pointers | |
2657 // take 2 registers, but the VM wants only the 'main' name. | |
2658 return regs.first(); | |
2659 } | |
2660 | |
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2661 VMRegPair *SharedRuntime::find_callee_arguments(Symbol* sig, bool has_receiver, int* arg_size) { |
0 | 2662 // This method is returning a data structure allocating as a |
2663 // ResourceObject, so do not put any ResourceMarks in here. | |
2664 char *s = sig->as_C_string(); | |
2665 int len = (int)strlen(s); | |
2666 *s++; len--; // Skip opening paren | |
2667 char *t = s+len; | |
2668 while( *(--t) != ')' ) ; // Find close paren | |
2669 | |
2670 BasicType *sig_bt = NEW_RESOURCE_ARRAY( BasicType, 256 ); | |
2671 VMRegPair *regs = NEW_RESOURCE_ARRAY( VMRegPair, 256 ); | |
2672 int cnt = 0; | |
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2673 if (has_receiver) { |
0 | 2674 sig_bt[cnt++] = T_OBJECT; // Receiver is argument 0; not in signature |
2675 } | |
2676 | |
2677 while( s < t ) { | |
2678 switch( *s++ ) { // Switch on signature character | |
2679 case 'B': sig_bt[cnt++] = T_BYTE; break; | |
2680 case 'C': sig_bt[cnt++] = T_CHAR; break; | |
2681 case 'D': sig_bt[cnt++] = T_DOUBLE; sig_bt[cnt++] = T_VOID; break; | |
2682 case 'F': sig_bt[cnt++] = T_FLOAT; break; | |
2683 case 'I': sig_bt[cnt++] = T_INT; break; | |
2684 case 'J': sig_bt[cnt++] = T_LONG; sig_bt[cnt++] = T_VOID; break; | |
2685 case 'S': sig_bt[cnt++] = T_SHORT; break; | |
2686 case 'Z': sig_bt[cnt++] = T_BOOLEAN; break; | |
2687 case 'V': sig_bt[cnt++] = T_VOID; break; | |
2688 case 'L': // Oop | |
2689 while( *s++ != ';' ) ; // Skip signature | |
2690 sig_bt[cnt++] = T_OBJECT; | |
2691 break; | |
2692 case '[': { // Array | |
2693 do { // Skip optional size | |
2694 while( *s >= '0' && *s <= '9' ) s++; | |
2695 } while( *s++ == '[' ); // Nested arrays? | |
2696 // Skip element type | |
2697 if( s[-1] == 'L' ) | |
2698 while( *s++ != ';' ) ; // Skip signature | |
2699 sig_bt[cnt++] = T_ARRAY; | |
2700 break; | |
2701 } | |
2702 default : ShouldNotReachHere(); | |
2703 } | |
2704 } | |
2705 assert( cnt < 256, "grow table size" ); | |
2706 | |
2707 int comp_args_on_stack; | |
2708 comp_args_on_stack = java_calling_convention(sig_bt, regs, cnt, true); | |
2709 | |
2710 // the calling convention doesn't count out_preserve_stack_slots so | |
2711 // we must add that in to get "true" stack offsets. | |
2712 | |
2713 if (comp_args_on_stack) { | |
2714 for (int i = 0; i < cnt; i++) { | |
2715 VMReg reg1 = regs[i].first(); | |
2716 if( reg1->is_stack()) { | |
2717 // Yuck | |
2718 reg1 = reg1->bias(out_preserve_stack_slots()); | |
2719 } | |
2720 VMReg reg2 = regs[i].second(); | |
2721 if( reg2->is_stack()) { | |
2722 // Yuck | |
2723 reg2 = reg2->bias(out_preserve_stack_slots()); | |
2724 } | |
2725 regs[i].set_pair(reg2, reg1); | |
2726 } | |
2727 } | |
2728 | |
2729 // results | |
2730 *arg_size = cnt; | |
2731 return regs; | |
2732 } | |
2733 | |
2734 // OSR Migration Code | |
2735 // | |
2736 // This code is used convert interpreter frames into compiled frames. It is | |
2737 // called from very start of a compiled OSR nmethod. A temp array is | |
2738 // allocated to hold the interesting bits of the interpreter frame. All | |
2739 // active locks are inflated to allow them to move. The displaced headers and | |
2740 // active interpeter locals are copied into the temp buffer. Then we return | |
2741 // back to the compiled code. The compiled code then pops the current | |
2742 // interpreter frame off the stack and pushes a new compiled frame. Then it | |
2743 // copies the interpreter locals and displaced headers where it wants. | |
2744 // Finally it calls back to free the temp buffer. | |
2745 // | |
2746 // All of this is done NOT at any Safepoint, nor is any safepoint or GC allowed. | |
2747 | |
2748 JRT_LEAF(intptr_t*, SharedRuntime::OSR_migration_begin( JavaThread *thread) ) | |
2749 | |
2750 #ifdef IA64 | |
2751 ShouldNotReachHere(); // NYI | |
2752 #endif /* IA64 */ | |
2753 | |
2754 // | |
2755 // This code is dependent on the memory layout of the interpreter local | |
2756 // array and the monitors. On all of our platforms the layout is identical | |
2757 // so this code is shared. If some platform lays the their arrays out | |
2758 // differently then this code could move to platform specific code or | |
2759 // the code here could be modified to copy items one at a time using | |
2760 // frame accessor methods and be platform independent. | |
2761 | |
2762 frame fr = thread->last_frame(); | |
2763 assert( fr.is_interpreted_frame(), "" ); | |
2764 assert( fr.interpreter_frame_expression_stack_size()==0, "only handle empty stacks" ); | |
2765 | |
2766 // Figure out how many monitors are active. | |
2767 int active_monitor_count = 0; | |
2768 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); | |
2769 kptr < fr.interpreter_frame_monitor_begin(); | |
2770 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { | |
2771 if( kptr->obj() != NULL ) active_monitor_count++; | |
2772 } | |
2773 | |
2774 // QQQ we could place number of active monitors in the array so that compiled code | |
2775 // could double check it. | |
2776 | |
2777 methodOop moop = fr.interpreter_frame_method(); | |
2778 int max_locals = moop->max_locals(); | |
2779 // Allocate temp buffer, 1 word per local & 2 per active monitor | |
2780 int buf_size_words = max_locals + active_monitor_count*2; | |
2781 intptr_t *buf = NEW_C_HEAP_ARRAY(intptr_t,buf_size_words); | |
2782 | |
2783 // Copy the locals. Order is preserved so that loading of longs works. | |
2784 // Since there's no GC I can copy the oops blindly. | |
2785 assert( sizeof(HeapWord)==sizeof(intptr_t), "fix this code"); | |
1506 | 2786 Copy::disjoint_words((HeapWord*)fr.interpreter_frame_local_at(max_locals-1), |
0 | 2787 (HeapWord*)&buf[0], |
2788 max_locals); | |
2789 | |
2790 // Inflate locks. Copy the displaced headers. Be careful, there can be holes. | |
2791 int i = max_locals; | |
2792 for( BasicObjectLock *kptr2 = fr.interpreter_frame_monitor_end(); | |
2793 kptr2 < fr.interpreter_frame_monitor_begin(); | |
2794 kptr2 = fr.next_monitor_in_interpreter_frame(kptr2) ) { | |
2795 if( kptr2->obj() != NULL) { // Avoid 'holes' in the monitor array | |
2796 BasicLock *lock = kptr2->lock(); | |
2797 // Inflate so the displaced header becomes position-independent | |
2798 if (lock->displaced_header()->is_unlocked()) | |
2799 ObjectSynchronizer::inflate_helper(kptr2->obj()); | |
2800 // Now the displaced header is free to move | |
2801 buf[i++] = (intptr_t)lock->displaced_header(); | |
2802 buf[i++] = (intptr_t)kptr2->obj(); | |
2803 } | |
2804 } | |
2805 assert( i - max_locals == active_monitor_count*2, "found the expected number of monitors" ); | |
2806 | |
2807 return buf; | |
2808 JRT_END | |
2809 | |
2810 JRT_LEAF(void, SharedRuntime::OSR_migration_end( intptr_t* buf) ) | |
2811 FREE_C_HEAP_ARRAY(intptr_t,buf); | |
2812 JRT_END | |
2813 | |
2814 bool AdapterHandlerLibrary::contains(CodeBlob* b) { | |
1187
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2815 AdapterHandlerTableIterator iter(_adapters); |
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2816 while (iter.has_next()) { |
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2817 AdapterHandlerEntry* a = iter.next(); |
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2818 if ( b == CodeCache::find_blob(a->get_i2c_entry()) ) return true; |
0 | 2819 } |
2820 return false; | |
2821 } | |
2822 | |
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2823 void AdapterHandlerLibrary::print_handler_on(outputStream* st, CodeBlob* b) { |
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2824 AdapterHandlerTableIterator iter(_adapters); |
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2825 while (iter.has_next()) { |
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2826 AdapterHandlerEntry* a = iter.next(); |
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2827 if ( b == CodeCache::find_blob(a->get_i2c_entry()) ) { |
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2828 st->print("Adapter for signature: "); |
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2829 st->print_cr("%s i2c: " INTPTR_FORMAT " c2i: " INTPTR_FORMAT " c2iUV: " INTPTR_FORMAT, |
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2830 a->fingerprint()->as_string(), |
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2831 a->get_i2c_entry(), a->get_c2i_entry(), a->get_c2i_unverified_entry()); |
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2832 |
0 | 2833 return; |
2834 } | |
2835 } | |
2836 assert(false, "Should have found handler"); | |
2837 } | |
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2838 |
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2839 #ifndef PRODUCT |
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2840 |
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2841 void AdapterHandlerLibrary::print_statistics() { |
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2842 _adapters->print_statistics(); |
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2843 } |
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2844 |
0 | 2845 #endif /* PRODUCT */ |