Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/sharedRuntime.cpp @ 3363:167b70ff3abc
6939861: JVM should handle more conversion operations
Reviewed-by: twisti, jrose
| author | never |
|---|---|
| date | Fri, 06 May 2011 16:33:13 -0700 |
| parents | 2a23b1b5a0a8 |
| children | f7d55ea6ee56 |
| rev | line source |
|---|---|
| 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 | |
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91 RicochetBlob* SharedRuntime::_ricochet_blob = NULL; |
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92 |
| 0 | 93 // Implementation of SharedRuntime |
| 94 | |
| 95 #ifndef PRODUCT | |
| 96 // For statistics | |
| 97 int SharedRuntime::_ic_miss_ctr = 0; | |
| 98 int SharedRuntime::_wrong_method_ctr = 0; | |
| 99 int SharedRuntime::_resolve_static_ctr = 0; | |
| 100 int SharedRuntime::_resolve_virtual_ctr = 0; | |
| 101 int SharedRuntime::_resolve_opt_virtual_ctr = 0; | |
| 102 int SharedRuntime::_implicit_null_throws = 0; | |
| 103 int SharedRuntime::_implicit_div0_throws = 0; | |
| 104 int SharedRuntime::_throw_null_ctr = 0; | |
| 105 | |
| 106 int SharedRuntime::_nof_normal_calls = 0; | |
| 107 int SharedRuntime::_nof_optimized_calls = 0; | |
| 108 int SharedRuntime::_nof_inlined_calls = 0; | |
| 109 int SharedRuntime::_nof_megamorphic_calls = 0; | |
| 110 int SharedRuntime::_nof_static_calls = 0; | |
| 111 int SharedRuntime::_nof_inlined_static_calls = 0; | |
| 112 int SharedRuntime::_nof_interface_calls = 0; | |
| 113 int SharedRuntime::_nof_optimized_interface_calls = 0; | |
| 114 int SharedRuntime::_nof_inlined_interface_calls = 0; | |
| 115 int SharedRuntime::_nof_megamorphic_interface_calls = 0; | |
| 116 int SharedRuntime::_nof_removable_exceptions = 0; | |
| 117 | |
| 118 int SharedRuntime::_new_instance_ctr=0; | |
| 119 int SharedRuntime::_new_array_ctr=0; | |
| 120 int SharedRuntime::_multi1_ctr=0; | |
| 121 int SharedRuntime::_multi2_ctr=0; | |
| 122 int SharedRuntime::_multi3_ctr=0; | |
| 123 int SharedRuntime::_multi4_ctr=0; | |
| 124 int SharedRuntime::_multi5_ctr=0; | |
| 125 int SharedRuntime::_mon_enter_stub_ctr=0; | |
| 126 int SharedRuntime::_mon_exit_stub_ctr=0; | |
| 127 int SharedRuntime::_mon_enter_ctr=0; | |
| 128 int SharedRuntime::_mon_exit_ctr=0; | |
| 129 int SharedRuntime::_partial_subtype_ctr=0; | |
| 130 int SharedRuntime::_jbyte_array_copy_ctr=0; | |
| 131 int SharedRuntime::_jshort_array_copy_ctr=0; | |
| 132 int SharedRuntime::_jint_array_copy_ctr=0; | |
| 133 int SharedRuntime::_jlong_array_copy_ctr=0; | |
| 134 int SharedRuntime::_oop_array_copy_ctr=0; | |
| 135 int SharedRuntime::_checkcast_array_copy_ctr=0; | |
| 136 int SharedRuntime::_unsafe_array_copy_ctr=0; | |
| 137 int SharedRuntime::_generic_array_copy_ctr=0; | |
| 138 int SharedRuntime::_slow_array_copy_ctr=0; | |
| 139 int SharedRuntime::_find_handler_ctr=0; | |
| 140 int SharedRuntime::_rethrow_ctr=0; | |
| 141 | |
| 142 int SharedRuntime::_ICmiss_index = 0; | |
| 143 int SharedRuntime::_ICmiss_count[SharedRuntime::maxICmiss_count]; | |
| 144 address SharedRuntime::_ICmiss_at[SharedRuntime::maxICmiss_count]; | |
| 145 | |
| 146 void SharedRuntime::trace_ic_miss(address at) { | |
| 147 for (int i = 0; i < _ICmiss_index; i++) { | |
| 148 if (_ICmiss_at[i] == at) { | |
| 149 _ICmiss_count[i]++; | |
| 150 return; | |
| 151 } | |
| 152 } | |
| 153 int index = _ICmiss_index++; | |
| 154 if (_ICmiss_index >= maxICmiss_count) _ICmiss_index = maxICmiss_count - 1; | |
| 155 _ICmiss_at[index] = at; | |
| 156 _ICmiss_count[index] = 1; | |
| 157 } | |
| 158 | |
| 159 void SharedRuntime::print_ic_miss_histogram() { | |
| 160 if (ICMissHistogram) { | |
| 161 tty->print_cr ("IC Miss Histogram:"); | |
| 162 int tot_misses = 0; | |
| 163 for (int i = 0; i < _ICmiss_index; i++) { | |
| 164 tty->print_cr(" at: " INTPTR_FORMAT " nof: %d", _ICmiss_at[i], _ICmiss_count[i]); | |
| 165 tot_misses += _ICmiss_count[i]; | |
| 166 } | |
| 167 tty->print_cr ("Total IC misses: %7d", tot_misses); | |
| 168 } | |
| 169 } | |
| 170 #endif // PRODUCT | |
| 171 | |
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172 #ifndef SERIALGC |
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173 |
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174 // G1 write-barrier pre: executed before a pointer store. |
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175 JRT_LEAF(void, SharedRuntime::g1_wb_pre(oopDesc* orig, JavaThread *thread)) |
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176 if (orig == NULL) { |
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177 assert(false, "should be optimized out"); |
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178 return; |
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179 } |
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180 assert(orig->is_oop(true /* ignore mark word */), "Error"); |
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181 // store the original value that was in the field reference |
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182 thread->satb_mark_queue().enqueue(orig); |
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183 JRT_END |
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184 |
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185 // G1 write-barrier post: executed after a pointer store. |
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186 JRT_LEAF(void, SharedRuntime::g1_wb_post(void* card_addr, JavaThread* thread)) |
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187 thread->dirty_card_queue().enqueue(card_addr); |
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188 JRT_END |
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189 |
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190 #endif // !SERIALGC |
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191 |
| 0 | 192 |
| 193 JRT_LEAF(jlong, SharedRuntime::lmul(jlong y, jlong x)) | |
| 194 return x * y; | |
| 195 JRT_END | |
| 196 | |
| 197 | |
| 198 JRT_LEAF(jlong, SharedRuntime::ldiv(jlong y, jlong x)) | |
| 199 if (x == min_jlong && y == CONST64(-1)) { | |
| 200 return x; | |
| 201 } else { | |
| 202 return x / y; | |
| 203 } | |
| 204 JRT_END | |
| 205 | |
| 206 | |
| 207 JRT_LEAF(jlong, SharedRuntime::lrem(jlong y, jlong x)) | |
| 208 if (x == min_jlong && y == CONST64(-1)) { | |
| 209 return 0; | |
| 210 } else { | |
| 211 return x % y; | |
| 212 } | |
| 213 JRT_END | |
| 214 | |
| 215 | |
| 216 const juint float_sign_mask = 0x7FFFFFFF; | |
| 217 const juint float_infinity = 0x7F800000; | |
| 218 const julong double_sign_mask = CONST64(0x7FFFFFFFFFFFFFFF); | |
| 219 const julong double_infinity = CONST64(0x7FF0000000000000); | |
| 220 | |
| 221 JRT_LEAF(jfloat, SharedRuntime::frem(jfloat x, jfloat y)) | |
| 222 #ifdef _WIN64 | |
| 223 // 64-bit Windows on amd64 returns the wrong values for | |
| 224 // infinity operands. | |
| 225 union { jfloat f; juint i; } xbits, ybits; | |
| 226 xbits.f = x; | |
| 227 ybits.f = y; | |
| 228 // x Mod Infinity == x unless x is infinity | |
| 229 if ( ((xbits.i & float_sign_mask) != float_infinity) && | |
| 230 ((ybits.i & float_sign_mask) == float_infinity) ) { | |
| 231 return x; | |
| 232 } | |
| 233 #endif | |
| 234 return ((jfloat)fmod((double)x,(double)y)); | |
| 235 JRT_END | |
| 236 | |
| 237 | |
| 238 JRT_LEAF(jdouble, SharedRuntime::drem(jdouble x, jdouble y)) | |
| 239 #ifdef _WIN64 | |
| 240 union { jdouble d; julong l; } xbits, ybits; | |
| 241 xbits.d = x; | |
| 242 ybits.d = y; | |
| 243 // x Mod Infinity == x unless x is infinity | |
| 244 if ( ((xbits.l & double_sign_mask) != double_infinity) && | |
| 245 ((ybits.l & double_sign_mask) == double_infinity) ) { | |
| 246 return x; | |
| 247 } | |
| 248 #endif | |
| 249 return ((jdouble)fmod((double)x,(double)y)); | |
| 250 JRT_END | |
| 251 | |
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252 #ifdef __SOFTFP__ |
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253 JRT_LEAF(jfloat, SharedRuntime::fadd(jfloat x, jfloat y)) |
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254 return x + y; |
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255 JRT_END |
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256 |
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257 JRT_LEAF(jfloat, SharedRuntime::fsub(jfloat x, jfloat y)) |
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258 return x - y; |
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259 JRT_END |
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260 |
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261 JRT_LEAF(jfloat, SharedRuntime::fmul(jfloat x, jfloat y)) |
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262 return x * y; |
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263 JRT_END |
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264 |
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265 JRT_LEAF(jfloat, SharedRuntime::fdiv(jfloat x, jfloat y)) |
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266 return x / y; |
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267 JRT_END |
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268 |
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269 JRT_LEAF(jdouble, SharedRuntime::dadd(jdouble x, jdouble y)) |
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270 return x + y; |
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271 JRT_END |
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272 |
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273 JRT_LEAF(jdouble, SharedRuntime::dsub(jdouble x, jdouble y)) |
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274 return x - y; |
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275 JRT_END |
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276 |
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277 JRT_LEAF(jdouble, SharedRuntime::dmul(jdouble x, jdouble y)) |
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278 return x * y; |
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279 JRT_END |
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280 |
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281 JRT_LEAF(jdouble, SharedRuntime::ddiv(jdouble x, jdouble y)) |
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282 return x / y; |
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283 JRT_END |
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284 |
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285 JRT_LEAF(jfloat, SharedRuntime::i2f(jint x)) |
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286 return (jfloat)x; |
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287 JRT_END |
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288 |
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289 JRT_LEAF(jdouble, SharedRuntime::i2d(jint x)) |
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290 return (jdouble)x; |
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291 JRT_END |
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292 |
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293 JRT_LEAF(jdouble, SharedRuntime::f2d(jfloat x)) |
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294 return (jdouble)x; |
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295 JRT_END |
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296 |
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297 JRT_LEAF(int, SharedRuntime::fcmpl(float x, float y)) |
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298 return x>y ? 1 : (x==y ? 0 : -1); /* x<y or is_nan*/ |
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299 JRT_END |
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300 |
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301 JRT_LEAF(int, SharedRuntime::fcmpg(float x, float y)) |
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302 return x<y ? -1 : (x==y ? 0 : 1); /* x>y or is_nan */ |
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303 JRT_END |
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304 |
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305 JRT_LEAF(int, SharedRuntime::dcmpl(double x, double y)) |
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306 return x>y ? 1 : (x==y ? 0 : -1); /* x<y or is_nan */ |
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307 JRT_END |
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308 |
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309 JRT_LEAF(int, SharedRuntime::dcmpg(double x, double y)) |
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310 return x<y ? -1 : (x==y ? 0 : 1); /* x>y or is_nan */ |
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311 JRT_END |
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312 |
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313 // Functions to return the opposite of the aeabi functions for nan. |
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314 JRT_LEAF(int, SharedRuntime::unordered_fcmplt(float x, float y)) |
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315 return (x < y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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316 JRT_END |
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317 |
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318 JRT_LEAF(int, SharedRuntime::unordered_dcmplt(double x, double y)) |
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319 return (x < y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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320 JRT_END |
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321 |
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322 JRT_LEAF(int, SharedRuntime::unordered_fcmple(float x, float y)) |
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323 return (x <= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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324 JRT_END |
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325 |
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326 JRT_LEAF(int, SharedRuntime::unordered_dcmple(double x, double y)) |
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327 return (x <= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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328 JRT_END |
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329 |
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330 JRT_LEAF(int, SharedRuntime::unordered_fcmpge(float x, float y)) |
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331 return (x >= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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332 JRT_END |
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333 |
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334 JRT_LEAF(int, SharedRuntime::unordered_dcmpge(double x, double y)) |
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335 return (x >= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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336 JRT_END |
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337 |
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338 JRT_LEAF(int, SharedRuntime::unordered_fcmpgt(float x, float y)) |
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339 return (x > y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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340 JRT_END |
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341 |
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342 JRT_LEAF(int, SharedRuntime::unordered_dcmpgt(double x, double y)) |
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343 return (x > y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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344 JRT_END |
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345 |
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346 // Intrinsics make gcc generate code for these. |
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347 float SharedRuntime::fneg(float f) { |
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348 return -f; |
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349 } |
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350 |
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351 double SharedRuntime::dneg(double f) { |
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352 return -f; |
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353 } |
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354 |
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355 #endif // __SOFTFP__ |
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356 |
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357 #if defined(__SOFTFP__) || defined(E500V2) |
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358 // Intrinsics make gcc generate code for these. |
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359 double SharedRuntime::dabs(double f) { |
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360 return (f <= (double)0.0) ? (double)0.0 - f : f; |
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361 } |
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362 |
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363 #endif |
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364 |
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365 #if defined(__SOFTFP__) || defined(PPC) |
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366 double SharedRuntime::dsqrt(double f) { |
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367 return sqrt(f); |
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368 } |
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369 #endif |
| 0 | 370 |
| 371 JRT_LEAF(jint, SharedRuntime::f2i(jfloat x)) | |
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372 if (g_isnan(x)) |
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373 return 0; |
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374 if (x >= (jfloat) max_jint) |
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375 return max_jint; |
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376 if (x <= (jfloat) min_jint) |
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377 return min_jint; |
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378 return (jint) x; |
| 0 | 379 JRT_END |
| 380 | |
| 381 | |
| 382 JRT_LEAF(jlong, SharedRuntime::f2l(jfloat x)) | |
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383 if (g_isnan(x)) |
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384 return 0; |
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385 if (x >= (jfloat) max_jlong) |
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386 return max_jlong; |
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387 if (x <= (jfloat) min_jlong) |
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388 return min_jlong; |
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389 return (jlong) x; |
| 0 | 390 JRT_END |
| 391 | |
| 392 | |
| 393 JRT_LEAF(jint, SharedRuntime::d2i(jdouble x)) | |
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394 if (g_isnan(x)) |
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395 return 0; |
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396 if (x >= (jdouble) max_jint) |
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397 return max_jint; |
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398 if (x <= (jdouble) min_jint) |
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399 return min_jint; |
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400 return (jint) x; |
| 0 | 401 JRT_END |
| 402 | |
| 403 | |
| 404 JRT_LEAF(jlong, SharedRuntime::d2l(jdouble x)) | |
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405 if (g_isnan(x)) |
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406 return 0; |
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407 if (x >= (jdouble) max_jlong) |
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408 return max_jlong; |
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409 if (x <= (jdouble) min_jlong) |
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410 return min_jlong; |
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411 return (jlong) x; |
| 0 | 412 JRT_END |
| 413 | |
| 414 | |
| 415 JRT_LEAF(jfloat, SharedRuntime::d2f(jdouble x)) | |
| 416 return (jfloat)x; | |
| 417 JRT_END | |
| 418 | |
| 419 | |
| 420 JRT_LEAF(jfloat, SharedRuntime::l2f(jlong x)) | |
| 421 return (jfloat)x; | |
| 422 JRT_END | |
| 423 | |
| 424 | |
| 425 JRT_LEAF(jdouble, SharedRuntime::l2d(jlong x)) | |
| 426 return (jdouble)x; | |
| 427 JRT_END | |
| 428 | |
| 429 // Exception handling accross interpreter/compiler boundaries | |
| 430 // | |
| 431 // exception_handler_for_return_address(...) returns the continuation address. | |
| 432 // The continuation address is the entry point of the exception handler of the | |
| 433 // previous frame depending on the return address. | |
| 434 | |
| 1295 | 435 address SharedRuntime::raw_exception_handler_for_return_address(JavaThread* thread, address return_address) { |
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436 assert(frame::verify_return_pc(return_address), err_msg("must be a return address: " INTPTR_FORMAT, return_address)); |
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437 |
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438 // Reset method handle flag. |
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439 thread->set_is_method_handle_return(false); |
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440 |
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441 // The fastest case first |
| 0 | 442 CodeBlob* blob = CodeCache::find_blob(return_address); |
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443 nmethod* nm = (blob != NULL) ? blob->as_nmethod_or_null() : NULL; |
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444 if (nm != NULL) { |
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445 // Set flag if return address is a method handle call site. |
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446 thread->set_is_method_handle_return(nm->is_method_handle_return(return_address)); |
| 0 | 447 // native nmethods don't have exception handlers |
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448 assert(!nm->is_native_method(), "no exception handler"); |
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449 assert(nm->header_begin() != nm->exception_begin(), "no exception handler"); |
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450 if (nm->is_deopt_pc(return_address)) { |
| 0 | 451 return SharedRuntime::deopt_blob()->unpack_with_exception(); |
| 452 } else { | |
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453 return nm->exception_begin(); |
| 0 | 454 } |
| 455 } | |
| 456 | |
| 457 // Entry code | |
| 458 if (StubRoutines::returns_to_call_stub(return_address)) { | |
| 459 return StubRoutines::catch_exception_entry(); | |
| 460 } | |
| 461 // Interpreted code | |
| 462 if (Interpreter::contains(return_address)) { | |
| 463 return Interpreter::rethrow_exception_entry(); | |
| 464 } | |
|
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465 // Ricochet frame unwind code |
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466 if (SharedRuntime::ricochet_blob() != NULL && SharedRuntime::ricochet_blob()->returns_to_bounce_addr(return_address)) { |
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467 return SharedRuntime::ricochet_blob()->exception_addr(); |
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468 } |
| 0 | 469 |
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470 guarantee(blob == NULL || !blob->is_runtime_stub(), "caller should have skipped stub"); |
| 0 | 471 guarantee(!VtableStubs::contains(return_address), "NULL exceptions in vtables should have been handled already!"); |
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472 |
| 0 | 473 #ifndef PRODUCT |
| 474 { ResourceMark rm; | |
| 475 tty->print_cr("No exception handler found for exception at " INTPTR_FORMAT " - potential problems:", return_address); | |
| 476 tty->print_cr("a) exception happened in (new?) code stubs/buffers that is not handled here"); | |
| 477 tty->print_cr("b) other problem"); | |
| 478 } | |
| 479 #endif // PRODUCT | |
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480 |
| 0 | 481 ShouldNotReachHere(); |
| 482 return NULL; | |
| 483 } | |
| 484 | |
| 485 | |
| 1295 | 486 JRT_LEAF(address, SharedRuntime::exception_handler_for_return_address(JavaThread* thread, address return_address)) |
| 487 return raw_exception_handler_for_return_address(thread, return_address); | |
| 0 | 488 JRT_END |
| 489 | |
| 1295 | 490 |
| 0 | 491 address SharedRuntime::get_poll_stub(address pc) { |
| 492 address stub; | |
| 493 // Look up the code blob | |
| 494 CodeBlob *cb = CodeCache::find_blob(pc); | |
| 495 | |
| 496 // Should be an nmethod | |
| 497 assert( cb && cb->is_nmethod(), "safepoint polling: pc must refer to an nmethod" ); | |
| 498 | |
| 499 // Look up the relocation information | |
| 500 assert( ((nmethod*)cb)->is_at_poll_or_poll_return(pc), | |
| 501 "safepoint polling: type must be poll" ); | |
| 502 | |
| 503 assert( ((NativeInstruction*)pc)->is_safepoint_poll(), | |
| 504 "Only polling locations are used for safepoint"); | |
| 505 | |
| 506 bool at_poll_return = ((nmethod*)cb)->is_at_poll_return(pc); | |
| 507 if (at_poll_return) { | |
| 508 assert(SharedRuntime::polling_page_return_handler_blob() != NULL, | |
| 509 "polling page return stub not created yet"); | |
| 1748 | 510 stub = SharedRuntime::polling_page_return_handler_blob()->entry_point(); |
| 0 | 511 } else { |
| 512 assert(SharedRuntime::polling_page_safepoint_handler_blob() != NULL, | |
| 513 "polling page safepoint stub not created yet"); | |
| 1748 | 514 stub = SharedRuntime::polling_page_safepoint_handler_blob()->entry_point(); |
| 0 | 515 } |
| 516 #ifndef PRODUCT | |
| 517 if( TraceSafepoint ) { | |
| 518 char buf[256]; | |
| 519 jio_snprintf(buf, sizeof(buf), | |
| 520 "... found polling page %s exception at pc = " | |
| 521 INTPTR_FORMAT ", stub =" INTPTR_FORMAT, | |
| 522 at_poll_return ? "return" : "loop", | |
| 523 (intptr_t)pc, (intptr_t)stub); | |
| 524 tty->print_raw_cr(buf); | |
| 525 } | |
| 526 #endif // PRODUCT | |
| 527 return stub; | |
| 528 } | |
| 529 | |
| 530 | |
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531 oop SharedRuntime::retrieve_receiver( Symbol* sig, frame caller ) { |
| 0 | 532 assert(caller.is_interpreted_frame(), ""); |
| 533 int args_size = ArgumentSizeComputer(sig).size() + 1; | |
| 534 assert(args_size <= caller.interpreter_frame_expression_stack_size(), "receiver must be on interpreter stack"); | |
| 535 oop result = (oop) *caller.interpreter_frame_tos_at(args_size - 1); | |
| 536 assert(Universe::heap()->is_in(result) && result->is_oop(), "receiver must be an oop"); | |
| 537 return result; | |
| 538 } | |
| 539 | |
| 540 | |
| 541 void SharedRuntime::throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception) { | |
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542 if (JvmtiExport::can_post_on_exceptions()) { |
| 0 | 543 vframeStream vfst(thread, true); |
| 544 methodHandle method = methodHandle(thread, vfst.method()); | |
| 545 address bcp = method()->bcp_from(vfst.bci()); | |
| 546 JvmtiExport::post_exception_throw(thread, method(), bcp, h_exception()); | |
| 547 } | |
| 548 Exceptions::_throw(thread, __FILE__, __LINE__, h_exception); | |
| 549 } | |
| 550 | |
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551 void SharedRuntime::throw_and_post_jvmti_exception(JavaThread *thread, Symbol* name, const char *message) { |
| 0 | 552 Handle h_exception = Exceptions::new_exception(thread, name, message); |
| 553 throw_and_post_jvmti_exception(thread, h_exception); | |
| 554 } | |
| 555 | |
|
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556 // The interpreter code to call this tracing function is only |
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557 // called/generated when TraceRedefineClasses has the right bits |
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558 // set. Since obsolete methods are never compiled, we don't have |
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559 // to modify the compilers to generate calls to this function. |
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560 // |
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561 JRT_LEAF(int, SharedRuntime::rc_trace_method_entry( |
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562 JavaThread* thread, methodOopDesc* method)) |
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563 assert(RC_TRACE_IN_RANGE(0x00001000, 0x00002000), "wrong call"); |
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564 |
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565 if (method->is_obsolete()) { |
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566 // We are calling an obsolete method, but this is not necessarily |
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567 // an error. Our method could have been redefined just after we |
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568 // fetched the methodOop from the constant pool. |
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569 |
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570 // RC_TRACE macro has an embedded ResourceMark |
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571 RC_TRACE_WITH_THREAD(0x00001000, thread, |
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572 ("calling obsolete method '%s'", |
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573 method->name_and_sig_as_C_string())); |
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574 if (RC_TRACE_ENABLED(0x00002000)) { |
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575 // this option is provided to debug calls to obsolete methods |
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576 guarantee(false, "faulting at call to an obsolete method."); |
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577 } |
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578 } |
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579 return 0; |
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580 JRT_END |
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581 |
| 0 | 582 // ret_pc points into caller; we are returning caller's exception handler |
| 583 // for given exception | |
| 584 address SharedRuntime::compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception, | |
| 585 bool force_unwind, bool top_frame_only) { | |
| 586 assert(nm != NULL, "must exist"); | |
| 587 ResourceMark rm; | |
| 588 | |
| 589 ScopeDesc* sd = nm->scope_desc_at(ret_pc); | |
| 590 // determine handler bci, if any | |
| 591 EXCEPTION_MARK; | |
| 592 | |
| 593 int handler_bci = -1; | |
| 594 int scope_depth = 0; | |
| 595 if (!force_unwind) { | |
| 596 int bci = sd->bci(); | |
| 597 do { | |
| 598 bool skip_scope_increment = false; | |
| 599 // exception handler lookup | |
| 600 KlassHandle ek (THREAD, exception->klass()); | |
| 601 handler_bci = sd->method()->fast_exception_handler_bci_for(ek, bci, THREAD); | |
| 602 if (HAS_PENDING_EXCEPTION) { | |
| 603 // We threw an exception while trying to find the exception handler. | |
| 604 // Transfer the new exception to the exception handle which will | |
| 605 // be set into thread local storage, and do another lookup for an | |
| 606 // exception handler for this exception, this time starting at the | |
| 607 // BCI of the exception handler which caused the exception to be | |
| 608 // thrown (bugs 4307310 and 4546590). Set "exception" reference | |
| 609 // argument to ensure that the correct exception is thrown (4870175). | |
| 610 exception = Handle(THREAD, PENDING_EXCEPTION); | |
| 611 CLEAR_PENDING_EXCEPTION; | |
| 612 if (handler_bci >= 0) { | |
| 613 bci = handler_bci; | |
| 614 handler_bci = -1; | |
| 615 skip_scope_increment = true; | |
| 616 } | |
| 617 } | |
| 618 if (!top_frame_only && handler_bci < 0 && !skip_scope_increment) { | |
| 619 sd = sd->sender(); | |
| 620 if (sd != NULL) { | |
| 621 bci = sd->bci(); | |
| 622 } | |
| 623 ++scope_depth; | |
| 624 } | |
| 625 } while (!top_frame_only && handler_bci < 0 && sd != NULL); | |
| 626 } | |
| 627 | |
| 628 // found handling method => lookup exception handler | |
| 1748 | 629 int catch_pco = ret_pc - nm->code_begin(); |
| 0 | 630 |
| 631 ExceptionHandlerTable table(nm); | |
| 632 HandlerTableEntry *t = table.entry_for(catch_pco, handler_bci, scope_depth); | |
| 633 if (t == NULL && (nm->is_compiled_by_c1() || handler_bci != -1)) { | |
| 634 // Allow abbreviated catch tables. The idea is to allow a method | |
| 635 // to materialize its exceptions without committing to the exact | |
| 636 // routing of exceptions. In particular this is needed for adding | |
| 637 // a synthethic handler to unlock monitors when inlining | |
| 638 // synchonized methods since the unlock path isn't represented in | |
| 639 // the bytecodes. | |
| 640 t = table.entry_for(catch_pco, -1, 0); | |
| 641 } | |
| 642 | |
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643 #ifdef COMPILER1 |
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644 if (t == NULL && nm->is_compiled_by_c1()) { |
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645 assert(nm->unwind_handler_begin() != NULL, ""); |
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646 return nm->unwind_handler_begin(); |
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647 } |
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648 #endif |
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649 |
| 0 | 650 if (t == NULL) { |
| 651 tty->print_cr("MISSING EXCEPTION HANDLER for pc " INTPTR_FORMAT " and handler bci %d", ret_pc, handler_bci); | |
| 652 tty->print_cr(" Exception:"); | |
| 653 exception->print(); | |
| 654 tty->cr(); | |
| 655 tty->print_cr(" Compiled exception table :"); | |
| 656 table.print(); | |
| 657 nm->print_code(); | |
| 658 guarantee(false, "missing exception handler"); | |
| 659 return NULL; | |
| 660 } | |
| 661 | |
| 1748 | 662 return nm->code_begin() + t->pco(); |
| 0 | 663 } |
| 664 | |
| 665 JRT_ENTRY(void, SharedRuntime::throw_AbstractMethodError(JavaThread* thread)) | |
| 666 // These errors occur only at call sites | |
| 667 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_AbstractMethodError()); | |
| 668 JRT_END | |
| 669 | |
|
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670 JRT_ENTRY(void, SharedRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) |
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671 // These errors occur only at call sites |
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672 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_IncompatibleClassChangeError(), "vtable stub"); |
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673 JRT_END |
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674 |
| 0 | 675 JRT_ENTRY(void, SharedRuntime::throw_ArithmeticException(JavaThread* thread)) |
| 676 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArithmeticException(), "/ by zero"); | |
| 677 JRT_END | |
| 678 | |
| 679 JRT_ENTRY(void, SharedRuntime::throw_NullPointerException(JavaThread* thread)) | |
| 680 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException()); | |
| 681 JRT_END | |
| 682 | |
| 683 JRT_ENTRY(void, SharedRuntime::throw_NullPointerException_at_call(JavaThread* thread)) | |
| 684 // This entry point is effectively only used for NullPointerExceptions which occur at inline | |
| 685 // cache sites (when the callee activation is not yet set up) so we are at a call site | |
| 686 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException()); | |
| 687 JRT_END | |
| 688 | |
| 689 JRT_ENTRY(void, SharedRuntime::throw_StackOverflowError(JavaThread* thread)) | |
| 690 // We avoid using the normal exception construction in this case because | |
| 691 // it performs an upcall to Java, and we're already out of stack space. | |
| 692 klassOop k = SystemDictionary::StackOverflowError_klass(); | |
| 693 oop exception_oop = instanceKlass::cast(k)->allocate_instance(CHECK); | |
| 694 Handle exception (thread, exception_oop); | |
| 695 if (StackTraceInThrowable) { | |
| 696 java_lang_Throwable::fill_in_stack_trace(exception); | |
| 697 } | |
| 698 throw_and_post_jvmti_exception(thread, exception); | |
| 699 JRT_END | |
| 700 | |
| 701 address SharedRuntime::continuation_for_implicit_exception(JavaThread* thread, | |
| 702 address pc, | |
| 703 SharedRuntime::ImplicitExceptionKind exception_kind) | |
| 704 { | |
| 705 address target_pc = NULL; | |
| 706 | |
| 707 if (Interpreter::contains(pc)) { | |
| 708 #ifdef CC_INTERP | |
| 709 // C++ interpreter doesn't throw implicit exceptions | |
| 710 ShouldNotReachHere(); | |
| 711 #else | |
| 712 switch (exception_kind) { | |
| 713 case IMPLICIT_NULL: return Interpreter::throw_NullPointerException_entry(); | |
| 714 case IMPLICIT_DIVIDE_BY_ZERO: return Interpreter::throw_ArithmeticException_entry(); | |
| 715 case STACK_OVERFLOW: return Interpreter::throw_StackOverflowError_entry(); | |
| 716 default: ShouldNotReachHere(); | |
| 717 } | |
| 718 #endif // !CC_INTERP | |
| 719 } else { | |
| 720 switch (exception_kind) { | |
| 721 case STACK_OVERFLOW: { | |
| 722 // Stack overflow only occurs upon frame setup; the callee is | |
| 723 // going to be unwound. Dispatch to a shared runtime stub | |
| 724 // which will cause the StackOverflowError to be fabricated | |
| 725 // and processed. | |
| 726 // For stack overflow in deoptimization blob, cleanup thread. | |
| 727 if (thread->deopt_mark() != NULL) { | |
| 728 Deoptimization::cleanup_deopt_info(thread, NULL); | |
| 729 } | |
| 730 return StubRoutines::throw_StackOverflowError_entry(); | |
| 731 } | |
| 732 | |
| 733 case IMPLICIT_NULL: { | |
| 734 if (VtableStubs::contains(pc)) { | |
| 735 // We haven't yet entered the callee frame. Fabricate an | |
| 736 // exception and begin dispatching it in the caller. Since | |
| 737 // the caller was at a call site, it's safe to destroy all | |
| 738 // caller-saved registers, as these entry points do. | |
| 739 VtableStub* vt_stub = VtableStubs::stub_containing(pc); | |
|
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740 |
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741 // If vt_stub is NULL, then return NULL to signal handler to report the SEGV error. |
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742 if (vt_stub == NULL) return NULL; |
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743 |
| 0 | 744 if (vt_stub->is_abstract_method_error(pc)) { |
| 745 assert(!vt_stub->is_vtable_stub(), "should never see AbstractMethodErrors from vtable-type VtableStubs"); | |
| 746 return StubRoutines::throw_AbstractMethodError_entry(); | |
| 747 } else { | |
| 748 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
| 749 } | |
| 750 } else { | |
| 751 CodeBlob* cb = CodeCache::find_blob(pc); | |
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752 |
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753 // If code blob is NULL, then return NULL to signal handler to report the SEGV error. |
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754 if (cb == NULL) return NULL; |
| 0 | 755 |
| 756 // Exception happened in CodeCache. Must be either: | |
| 757 // 1. Inline-cache check in C2I handler blob, | |
| 758 // 2. Inline-cache check in nmethod, or | |
| 759 // 3. Implict null exception in nmethod | |
| 760 | |
| 761 if (!cb->is_nmethod()) { | |
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762 guarantee(cb->is_adapter_blob() || cb->is_method_handles_adapter_blob(), |
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763 "exception happened outside interpreter, nmethods and vtable stubs (1)"); |
| 0 | 764 // There is no handler here, so we will simply unwind. |
| 765 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
| 766 } | |
| 767 | |
| 768 // Otherwise, it's an nmethod. Consult its exception handlers. | |
| 769 nmethod* nm = (nmethod*)cb; | |
| 770 if (nm->inlinecache_check_contains(pc)) { | |
| 771 // exception happened inside inline-cache check code | |
| 772 // => the nmethod is not yet active (i.e., the frame | |
| 773 // is not set up yet) => use return address pushed by | |
| 774 // caller => don't push another return address | |
| 775 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
| 776 } | |
| 777 | |
| 778 #ifndef PRODUCT | |
| 779 _implicit_null_throws++; | |
| 780 #endif | |
| 781 target_pc = nm->continuation_for_implicit_exception(pc); | |
| 1250 | 782 // If there's an unexpected fault, target_pc might be NULL, |
| 783 // in which case we want to fall through into the normal | |
| 784 // error handling code. | |
| 0 | 785 } |
| 786 | |
| 787 break; // fall through | |
| 788 } | |
| 789 | |
| 790 | |
| 791 case IMPLICIT_DIVIDE_BY_ZERO: { | |
| 792 nmethod* nm = CodeCache::find_nmethod(pc); | |
| 793 guarantee(nm != NULL, "must have containing nmethod for implicit division-by-zero exceptions"); | |
| 794 #ifndef PRODUCT | |
| 795 _implicit_div0_throws++; | |
| 796 #endif | |
| 797 target_pc = nm->continuation_for_implicit_exception(pc); | |
| 1250 | 798 // If there's an unexpected fault, target_pc might be NULL, |
| 799 // in which case we want to fall through into the normal | |
| 800 // error handling code. | |
| 0 | 801 break; // fall through |
| 802 } | |
| 803 | |
| 804 default: ShouldNotReachHere(); | |
| 805 } | |
| 806 | |
| 807 assert(exception_kind == IMPLICIT_NULL || exception_kind == IMPLICIT_DIVIDE_BY_ZERO, "wrong implicit exception kind"); | |
| 808 | |
| 809 // for AbortVMOnException flag | |
| 810 NOT_PRODUCT(Exceptions::debug_check_abort("java.lang.NullPointerException")); | |
| 811 if (exception_kind == IMPLICIT_NULL) { | |
| 812 Events::log("Implicit null exception at " INTPTR_FORMAT " to " INTPTR_FORMAT, pc, target_pc); | |
| 813 } else { | |
| 814 Events::log("Implicit division by zero exception at " INTPTR_FORMAT " to " INTPTR_FORMAT, pc, target_pc); | |
| 815 } | |
| 816 return target_pc; | |
| 817 } | |
| 818 | |
| 819 ShouldNotReachHere(); | |
| 820 return NULL; | |
| 821 } | |
| 822 | |
| 823 | |
| 824 JNI_ENTRY(void, throw_unsatisfied_link_error(JNIEnv* env, ...)) | |
| 825 { | |
| 826 THROW(vmSymbols::java_lang_UnsatisfiedLinkError()); | |
| 827 } | |
| 828 JNI_END | |
| 829 | |
| 830 | |
| 831 address SharedRuntime::native_method_throw_unsatisfied_link_error_entry() { | |
| 832 return CAST_FROM_FN_PTR(address, &throw_unsatisfied_link_error); | |
| 833 } | |
| 834 | |
| 835 | |
| 836 #ifndef PRODUCT | |
| 837 JRT_ENTRY(intptr_t, SharedRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2)) | |
| 838 const frame f = thread->last_frame(); | |
| 839 assert(f.is_interpreted_frame(), "must be an interpreted frame"); | |
| 840 #ifndef PRODUCT | |
| 841 methodHandle mh(THREAD, f.interpreter_frame_method()); | |
| 842 BytecodeTracer::trace(mh, f.interpreter_frame_bcp(), tos, tos2); | |
| 843 #endif // !PRODUCT | |
| 844 return preserve_this_value; | |
| 845 JRT_END | |
| 846 #endif // !PRODUCT | |
| 847 | |
| 848 | |
| 849 JRT_ENTRY(void, SharedRuntime::yield_all(JavaThread* thread, int attempts)) | |
| 850 os::yield_all(attempts); | |
| 851 JRT_END | |
| 852 | |
| 853 | |
| 854 JRT_ENTRY_NO_ASYNC(void, SharedRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) | |
| 855 assert(obj->is_oop(), "must be a valid oop"); | |
| 856 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise"); | |
| 857 instanceKlass::register_finalizer(instanceOop(obj), CHECK); | |
| 858 JRT_END | |
| 859 | |
| 860 | |
| 861 jlong SharedRuntime::get_java_tid(Thread* thread) { | |
| 862 if (thread != NULL) { | |
| 863 if (thread->is_Java_thread()) { | |
| 864 oop obj = ((JavaThread*)thread)->threadObj(); | |
| 865 return (obj == NULL) ? 0 : java_lang_Thread::thread_id(obj); | |
| 866 } | |
| 867 } | |
| 868 return 0; | |
| 869 } | |
| 870 | |
| 871 /** | |
| 872 * This function ought to be a void function, but cannot be because | |
| 873 * it gets turned into a tail-call on sparc, which runs into dtrace bug | |
| 874 * 6254741. Once that is fixed we can remove the dummy return value. | |
| 875 */ | |
| 876 int SharedRuntime::dtrace_object_alloc(oopDesc* o) { | |
| 877 return dtrace_object_alloc_base(Thread::current(), o); | |
| 878 } | |
| 879 | |
| 880 int SharedRuntime::dtrace_object_alloc_base(Thread* thread, oopDesc* o) { | |
| 881 assert(DTraceAllocProbes, "wrong call"); | |
| 882 Klass* klass = o->blueprint(); | |
| 883 int size = o->size(); | |
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884 Symbol* name = klass->name(); |
| 0 | 885 HS_DTRACE_PROBE4(hotspot, object__alloc, get_java_tid(thread), |
| 886 name->bytes(), name->utf8_length(), size * HeapWordSize); | |
| 887 return 0; | |
| 888 } | |
| 889 | |
| 890 JRT_LEAF(int, SharedRuntime::dtrace_method_entry( | |
| 891 JavaThread* thread, methodOopDesc* method)) | |
| 892 assert(DTraceMethodProbes, "wrong call"); | |
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893 Symbol* kname = method->klass_name(); |
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894 Symbol* name = method->name(); |
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895 Symbol* sig = method->signature(); |
| 0 | 896 HS_DTRACE_PROBE7(hotspot, method__entry, get_java_tid(thread), |
| 897 kname->bytes(), kname->utf8_length(), | |
| 898 name->bytes(), name->utf8_length(), | |
| 899 sig->bytes(), sig->utf8_length()); | |
| 900 return 0; | |
| 901 JRT_END | |
| 902 | |
| 903 JRT_LEAF(int, SharedRuntime::dtrace_method_exit( | |
| 904 JavaThread* thread, methodOopDesc* method)) | |
| 905 assert(DTraceMethodProbes, "wrong call"); | |
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906 Symbol* kname = method->klass_name(); |
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907 Symbol* name = method->name(); |
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908 Symbol* sig = method->signature(); |
| 0 | 909 HS_DTRACE_PROBE7(hotspot, method__return, get_java_tid(thread), |
| 910 kname->bytes(), kname->utf8_length(), | |
| 911 name->bytes(), name->utf8_length(), | |
| 912 sig->bytes(), sig->utf8_length()); | |
| 913 return 0; | |
| 914 JRT_END | |
| 915 | |
| 916 | |
| 917 // Finds receiver, CallInfo (i.e. receiver method), and calling bytecode) | |
| 918 // for a call current in progress, i.e., arguments has been pushed on stack | |
| 919 // put callee has not been invoked yet. Used by: resolve virtual/static, | |
| 920 // vtable updates, etc. Caller frame must be compiled. | |
| 921 Handle SharedRuntime::find_callee_info(JavaThread* thread, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS) { | |
| 922 ResourceMark rm(THREAD); | |
| 923 | |
| 924 // last java frame on stack (which includes native call frames) | |
| 925 vframeStream vfst(thread, true); // Do not skip and javaCalls | |
| 926 | |
| 927 return find_callee_info_helper(thread, vfst, bc, callinfo, CHECK_(Handle())); | |
| 928 } | |
| 929 | |
| 930 | |
| 931 // Finds receiver, CallInfo (i.e. receiver method), and calling bytecode | |
| 932 // for a call current in progress, i.e., arguments has been pushed on stack | |
| 933 // but callee has not been invoked yet. Caller frame must be compiled. | |
| 934 Handle SharedRuntime::find_callee_info_helper(JavaThread* thread, | |
| 935 vframeStream& vfst, | |
| 936 Bytecodes::Code& bc, | |
| 937 CallInfo& callinfo, TRAPS) { | |
| 938 Handle receiver; | |
| 939 Handle nullHandle; //create a handy null handle for exception returns | |
| 940 | |
| 941 assert(!vfst.at_end(), "Java frame must exist"); | |
| 942 | |
| 943 // Find caller and bci from vframe | |
| 944 methodHandle caller (THREAD, vfst.method()); | |
| 945 int bci = vfst.bci(); | |
| 946 | |
| 947 // Find bytecode | |
| 2142 | 948 Bytecode_invoke bytecode(caller, bci); |
| 949 bc = bytecode.java_code(); | |
| 950 int bytecode_index = bytecode.index(); | |
| 0 | 951 |
| 952 // Find receiver for non-static call | |
| 953 if (bc != Bytecodes::_invokestatic) { | |
| 954 // This register map must be update since we need to find the receiver for | |
| 955 // compiled frames. The receiver might be in a register. | |
| 956 RegisterMap reg_map2(thread); | |
| 957 frame stubFrame = thread->last_frame(); | |
| 958 // Caller-frame is a compiled frame | |
| 959 frame callerFrame = stubFrame.sender(®_map2); | |
| 960 | |
| 2142 | 961 methodHandle callee = bytecode.static_target(CHECK_(nullHandle)); |
| 0 | 962 if (callee.is_null()) { |
| 963 THROW_(vmSymbols::java_lang_NoSuchMethodException(), nullHandle); | |
| 964 } | |
| 965 // Retrieve from a compiled argument list | |
| 966 receiver = Handle(THREAD, callerFrame.retrieve_receiver(®_map2)); | |
| 967 | |
| 968 if (receiver.is_null()) { | |
| 969 THROW_(vmSymbols::java_lang_NullPointerException(), nullHandle); | |
| 970 } | |
| 971 } | |
| 972 | |
| 973 // Resolve method. This is parameterized by bytecode. | |
| 974 constantPoolHandle constants (THREAD, caller->constants()); | |
| 975 assert (receiver.is_null() || receiver->is_oop(), "wrong receiver"); | |
| 976 LinkResolver::resolve_invoke(callinfo, receiver, constants, bytecode_index, bc, CHECK_(nullHandle)); | |
| 977 | |
| 978 #ifdef ASSERT | |
| 979 // Check that the receiver klass is of the right subtype and that it is initialized for virtual calls | |
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980 if (bc != Bytecodes::_invokestatic && bc != Bytecodes::_invokedynamic) { |
| 0 | 981 assert(receiver.not_null(), "should have thrown exception"); |
| 982 KlassHandle receiver_klass (THREAD, receiver->klass()); | |
| 983 klassOop rk = constants->klass_ref_at(bytecode_index, CHECK_(nullHandle)); | |
| 984 // klass is already loaded | |
| 985 KlassHandle static_receiver_klass (THREAD, rk); | |
| 986 assert(receiver_klass->is_subtype_of(static_receiver_klass()), "actual receiver must be subclass of static receiver klass"); | |
| 987 if (receiver_klass->oop_is_instance()) { | |
| 988 if (instanceKlass::cast(receiver_klass())->is_not_initialized()) { | |
| 989 tty->print_cr("ERROR: Klass not yet initialized!!"); | |
| 990 receiver_klass.print(); | |
| 991 } | |
| 992 assert (!instanceKlass::cast(receiver_klass())->is_not_initialized(), "receiver_klass must be initialized"); | |
| 993 } | |
| 994 } | |
| 995 #endif | |
| 996 | |
| 997 return receiver; | |
| 998 } | |
| 999 | |
| 1000 methodHandle SharedRuntime::find_callee_method(JavaThread* thread, TRAPS) { | |
| 1001 ResourceMark rm(THREAD); | |
| 1002 // We need first to check if any Java activations (compiled, interpreted) | |
| 1003 // exist on the stack since last JavaCall. If not, we need | |
| 1004 // to get the target method from the JavaCall wrapper. | |
| 1005 vframeStream vfst(thread, true); // Do not skip any javaCalls | |
| 1006 methodHandle callee_method; | |
| 1007 if (vfst.at_end()) { | |
| 1008 // No Java frames were found on stack since we did the JavaCall. | |
| 1009 // Hence the stack can only contain an entry_frame. We need to | |
| 1010 // find the target method from the stub frame. | |
| 1011 RegisterMap reg_map(thread, false); | |
| 1012 frame fr = thread->last_frame(); | |
| 1013 assert(fr.is_runtime_frame(), "must be a runtimeStub"); | |
| 1014 fr = fr.sender(®_map); | |
| 1015 assert(fr.is_entry_frame(), "must be"); | |
| 1016 // fr is now pointing to the entry frame. | |
| 1017 callee_method = methodHandle(THREAD, fr.entry_frame_call_wrapper()->callee_method()); | |
| 1018 assert(fr.entry_frame_call_wrapper()->receiver() == NULL || !callee_method->is_static(), "non-null receiver for static call??"); | |
| 1019 } else { | |
| 1020 Bytecodes::Code bc; | |
| 1021 CallInfo callinfo; | |
| 1022 find_callee_info_helper(thread, vfst, bc, callinfo, CHECK_(methodHandle())); | |
| 1023 callee_method = callinfo.selected_method(); | |
| 1024 } | |
| 1025 assert(callee_method()->is_method(), "must be"); | |
| 1026 return callee_method; | |
| 1027 } | |
| 1028 | |
| 1029 // Resolves a call. | |
| 1030 methodHandle SharedRuntime::resolve_helper(JavaThread *thread, | |
| 1031 bool is_virtual, | |
| 1032 bool is_optimized, TRAPS) { | |
| 1033 methodHandle callee_method; | |
| 1034 callee_method = resolve_sub_helper(thread, is_virtual, is_optimized, THREAD); | |
| 1035 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { | |
| 1036 int retry_count = 0; | |
| 1037 while (!HAS_PENDING_EXCEPTION && callee_method->is_old() && | |
| 1142 | 1038 callee_method->method_holder() != SystemDictionary::Object_klass()) { |
| 0 | 1039 // If has a pending exception then there is no need to re-try to |
| 1040 // resolve this method. | |
| 1041 // If the method has been redefined, we need to try again. | |
| 1042 // Hack: we have no way to update the vtables of arrays, so don't | |
| 1043 // require that java.lang.Object has been updated. | |
| 1044 | |
| 1045 // It is very unlikely that method is redefined more than 100 times | |
| 1046 // in the middle of resolve. If it is looping here more than 100 times | |
| 1047 // means then there could be a bug here. | |
| 1048 guarantee((retry_count++ < 100), | |
| 1049 "Could not resolve to latest version of redefined method"); | |
| 1050 // method is redefined in the middle of resolve so re-try. | |
| 1051 callee_method = resolve_sub_helper(thread, is_virtual, is_optimized, THREAD); | |
| 1052 } | |
| 1053 } | |
| 1054 return callee_method; | |
| 1055 } | |
| 1056 | |
| 1057 // Resolves a call. The compilers generate code for calls that go here | |
| 1058 // and are patched with the real destination of the call. | |
| 1059 methodHandle SharedRuntime::resolve_sub_helper(JavaThread *thread, | |
| 1060 bool is_virtual, | |
| 1061 bool is_optimized, TRAPS) { | |
| 1062 | |
| 1063 ResourceMark rm(thread); | |
| 1064 RegisterMap cbl_map(thread, false); | |
| 1065 frame caller_frame = thread->last_frame().sender(&cbl_map); | |
| 1066 | |
| 1295 | 1067 CodeBlob* caller_cb = caller_frame.cb(); |
| 1068 guarantee(caller_cb != NULL && caller_cb->is_nmethod(), "must be called from nmethod"); | |
| 1069 nmethod* caller_nm = caller_cb->as_nmethod_or_null(); | |
| 0 | 1070 // make sure caller is not getting deoptimized |
| 1071 // and removed before we are done with it. | |
| 1072 // CLEANUP - with lazy deopt shouldn't need this lock | |
| 1295 | 1073 nmethodLocker caller_lock(caller_nm); |
| 0 | 1074 |
| 1075 | |
| 1076 // determine call info & receiver | |
| 1077 // note: a) receiver is NULL for static calls | |
| 1078 // b) an exception is thrown if receiver is NULL for non-static calls | |
| 1079 CallInfo call_info; | |
| 1080 Bytecodes::Code invoke_code = Bytecodes::_illegal; | |
| 1081 Handle receiver = find_callee_info(thread, invoke_code, | |
| 1082 call_info, CHECK_(methodHandle())); | |
| 1083 methodHandle callee_method = call_info.selected_method(); | |
| 1084 | |
| 1085 assert((!is_virtual && invoke_code == Bytecodes::_invokestatic) || | |
| 1086 ( is_virtual && invoke_code != Bytecodes::_invokestatic), "inconsistent bytecode"); | |
| 1087 | |
| 1088 #ifndef PRODUCT | |
| 1089 // tracing/debugging/statistics | |
| 1090 int *addr = (is_optimized) ? (&_resolve_opt_virtual_ctr) : | |
| 1091 (is_virtual) ? (&_resolve_virtual_ctr) : | |
| 1092 (&_resolve_static_ctr); | |
| 1093 Atomic::inc(addr); | |
| 1094 | |
| 1095 if (TraceCallFixup) { | |
| 1096 ResourceMark rm(thread); | |
| 1097 tty->print("resolving %s%s (%s) call to", | |
| 1098 (is_optimized) ? "optimized " : "", (is_virtual) ? "virtual" : "static", | |
| 1099 Bytecodes::name(invoke_code)); | |
| 1100 callee_method->print_short_name(tty); | |
| 1101 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
| 1102 } | |
| 1103 #endif | |
| 1104 | |
| 1295 | 1105 // JSR 292 |
| 1106 // If the resolved method is a MethodHandle invoke target the call | |
| 1107 // site must be a MethodHandle call site. | |
| 1108 if (callee_method->is_method_handle_invoke()) { | |
| 1109 assert(caller_nm->is_method_handle_return(caller_frame.pc()), "must be MH call site"); | |
| 1110 } | |
| 1111 | |
| 0 | 1112 // Compute entry points. This might require generation of C2I converter |
| 1113 // frames, so we cannot be holding any locks here. Furthermore, the | |
| 1114 // computation of the entry points is independent of patching the call. We | |
| 1115 // always return the entry-point, but we only patch the stub if the call has | |
| 1116 // not been deoptimized. Return values: For a virtual call this is an | |
| 1117 // (cached_oop, destination address) pair. For a static call/optimized | |
| 1118 // virtual this is just a destination address. | |
| 1119 | |
| 1120 StaticCallInfo static_call_info; | |
| 1121 CompiledICInfo virtual_call_info; | |
| 1122 | |
| 1123 // Make sure the callee nmethod does not get deoptimized and removed before | |
| 1124 // we are done patching the code. | |
| 1295 | 1125 nmethod* callee_nm = callee_method->code(); |
| 1126 nmethodLocker nl_callee(callee_nm); | |
| 0 | 1127 #ifdef ASSERT |
| 1295 | 1128 address dest_entry_point = callee_nm == NULL ? 0 : callee_nm->entry_point(); // used below |
| 0 | 1129 #endif |
| 1130 | |
| 1131 if (is_virtual) { | |
| 1132 assert(receiver.not_null(), "sanity check"); | |
| 1133 bool static_bound = call_info.resolved_method()->can_be_statically_bound(); | |
| 1134 KlassHandle h_klass(THREAD, receiver->klass()); | |
| 1135 CompiledIC::compute_monomorphic_entry(callee_method, h_klass, | |
| 1136 is_optimized, static_bound, virtual_call_info, | |
| 1137 CHECK_(methodHandle())); | |
| 1138 } else { | |
| 1139 // static call | |
| 1140 CompiledStaticCall::compute_entry(callee_method, static_call_info); | |
| 1141 } | |
| 1142 | |
| 1143 // grab lock, check for deoptimization and potentially patch caller | |
| 1144 { | |
| 1145 MutexLocker ml_patch(CompiledIC_lock); | |
| 1146 | |
| 1147 // Now that we are ready to patch if the methodOop was redefined then | |
| 1148 // don't update call site and let the caller retry. | |
| 1149 | |
| 1150 if (!callee_method->is_old()) { | |
| 1151 #ifdef ASSERT | |
| 1152 // We must not try to patch to jump to an already unloaded method. | |
| 1153 if (dest_entry_point != 0) { | |
| 1154 assert(CodeCache::find_blob(dest_entry_point) != NULL, | |
| 1155 "should not unload nmethod while locked"); | |
| 1156 } | |
| 1157 #endif | |
| 1158 if (is_virtual) { | |
| 1159 CompiledIC* inline_cache = CompiledIC_before(caller_frame.pc()); | |
| 1160 if (inline_cache->is_clean()) { | |
| 1161 inline_cache->set_to_monomorphic(virtual_call_info); | |
| 1162 } | |
| 1163 } else { | |
| 1164 CompiledStaticCall* ssc = compiledStaticCall_before(caller_frame.pc()); | |
| 1165 if (ssc->is_clean()) ssc->set(static_call_info); | |
| 1166 } | |
| 1167 } | |
| 1168 | |
| 1169 } // unlock CompiledIC_lock | |
| 1170 | |
| 1171 return callee_method; | |
| 1172 } | |
| 1173 | |
| 1174 | |
| 1175 // Inline caches exist only in compiled code | |
| 1176 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_ic_miss(JavaThread* thread)) | |
| 1177 #ifdef ASSERT | |
| 1178 RegisterMap reg_map(thread, false); | |
| 1179 frame stub_frame = thread->last_frame(); | |
| 1180 assert(stub_frame.is_runtime_frame(), "sanity check"); | |
| 1181 frame caller_frame = stub_frame.sender(®_map); | |
| 1182 assert(!caller_frame.is_interpreted_frame() && !caller_frame.is_entry_frame(), "unexpected frame"); | |
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1183 assert(!caller_frame.is_ricochet_frame(), "unexpected frame"); |
| 0 | 1184 #endif /* ASSERT */ |
| 1185 | |
| 1186 methodHandle callee_method; | |
| 1187 JRT_BLOCK | |
| 1188 callee_method = SharedRuntime::handle_ic_miss_helper(thread, CHECK_NULL); | |
| 1189 // Return methodOop through TLS | |
| 1190 thread->set_vm_result(callee_method()); | |
| 1191 JRT_BLOCK_END | |
| 1192 // return compiled code entry point after potential safepoints | |
| 1193 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
| 1194 return callee_method->verified_code_entry(); | |
| 1195 JRT_END | |
| 1196 | |
| 1197 | |
| 1198 // Handle call site that has been made non-entrant | |
| 1199 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method(JavaThread* thread)) | |
| 1200 // 6243940 We might end up in here if the callee is deoptimized | |
| 1201 // as we race to call it. We don't want to take a safepoint if | |
| 1202 // the caller was interpreted because the caller frame will look | |
| 1203 // interpreted to the stack walkers and arguments are now | |
| 1204 // "compiled" so it is much better to make this transition | |
| 1205 // invisible to the stack walking code. The i2c path will | |
| 1206 // place the callee method in the callee_target. It is stashed | |
| 1207 // there because if we try and find the callee by normal means a | |
| 1208 // safepoint is possible and have trouble gc'ing the compiled args. | |
| 1209 RegisterMap reg_map(thread, false); | |
| 1210 frame stub_frame = thread->last_frame(); | |
| 1211 assert(stub_frame.is_runtime_frame(), "sanity check"); | |
| 1212 frame caller_frame = stub_frame.sender(®_map); | |
|
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1213 |
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1214 // MethodHandle invokes don't have a CompiledIC and should always |
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1215 // simply redispatch to the callee_target. |
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1216 address sender_pc = caller_frame.pc(); |
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1217 CodeBlob* sender_cb = caller_frame.cb(); |
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1218 nmethod* sender_nm = sender_cb->as_nmethod_or_null(); |
| 1204 | 1219 bool is_mh_invoke_via_adapter = false; // Direct c2c call or via adapter? |
| 1220 if (sender_nm != NULL && sender_nm->is_method_handle_return(sender_pc)) { | |
| 1221 // If the callee_target is set, then we have come here via an i2c | |
| 1222 // adapter. | |
| 1223 methodOop callee = thread->callee_target(); | |
| 1224 if (callee != NULL) { | |
| 1225 assert(callee->is_method(), "sanity"); | |
| 1226 is_mh_invoke_via_adapter = true; | |
| 1227 } | |
| 1228 } | |
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1229 |
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1230 if (caller_frame.is_interpreted_frame() || |
| 1204 | 1231 caller_frame.is_entry_frame() || |
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1232 caller_frame.is_ricochet_frame() || |
| 1204 | 1233 is_mh_invoke_via_adapter) { |
| 0 | 1234 methodOop callee = thread->callee_target(); |
| 1235 guarantee(callee != NULL && callee->is_method(), "bad handshake"); | |
| 1236 thread->set_vm_result(callee); | |
| 1237 thread->set_callee_target(NULL); | |
| 1238 return callee->get_c2i_entry(); | |
| 1239 } | |
| 1240 | |
| 1241 // Must be compiled to compiled path which is safe to stackwalk | |
| 1242 methodHandle callee_method; | |
| 1243 JRT_BLOCK | |
| 1244 // Force resolving of caller (if we called from compiled frame) | |
| 1245 callee_method = SharedRuntime::reresolve_call_site(thread, CHECK_NULL); | |
| 1246 thread->set_vm_result(callee_method()); | |
| 1247 JRT_BLOCK_END | |
| 1248 // return compiled code entry point after potential safepoints | |
| 1249 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
| 1250 return callee_method->verified_code_entry(); | |
| 1251 JRT_END | |
| 1252 | |
| 1253 | |
| 1254 // resolve a static call and patch code | |
| 1255 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_static_call_C(JavaThread *thread )) | |
| 1256 methodHandle callee_method; | |
| 1257 JRT_BLOCK | |
| 1258 callee_method = SharedRuntime::resolve_helper(thread, false, false, CHECK_NULL); | |
| 1259 thread->set_vm_result(callee_method()); | |
| 1260 JRT_BLOCK_END | |
| 1261 // return compiled code entry point after potential safepoints | |
| 1262 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
| 1263 return callee_method->verified_code_entry(); | |
| 1264 JRT_END | |
| 1265 | |
| 1266 | |
| 1267 // resolve virtual call and update inline cache to monomorphic | |
| 1268 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_virtual_call_C(JavaThread *thread )) | |
| 1269 methodHandle callee_method; | |
| 1270 JRT_BLOCK | |
| 1271 callee_method = SharedRuntime::resolve_helper(thread, true, false, CHECK_NULL); | |
| 1272 thread->set_vm_result(callee_method()); | |
| 1273 JRT_BLOCK_END | |
| 1274 // return compiled code entry point after potential safepoints | |
| 1275 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
| 1276 return callee_method->verified_code_entry(); | |
| 1277 JRT_END | |
| 1278 | |
| 1279 | |
| 1280 // Resolve a virtual call that can be statically bound (e.g., always | |
| 1281 // monomorphic, so it has no inline cache). Patch code to resolved target. | |
| 1282 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_opt_virtual_call_C(JavaThread *thread)) | |
| 1283 methodHandle callee_method; | |
| 1284 JRT_BLOCK | |
| 1285 callee_method = SharedRuntime::resolve_helper(thread, true, true, CHECK_NULL); | |
| 1286 thread->set_vm_result(callee_method()); | |
| 1287 JRT_BLOCK_END | |
| 1288 // return compiled code entry point after potential safepoints | |
| 1289 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
| 1290 return callee_method->verified_code_entry(); | |
| 1291 JRT_END | |
| 1292 | |
| 1293 | |
| 1294 | |
| 1295 | |
| 1296 | |
| 1297 methodHandle SharedRuntime::handle_ic_miss_helper(JavaThread *thread, TRAPS) { | |
| 1298 ResourceMark rm(thread); | |
| 1299 CallInfo call_info; | |
| 1300 Bytecodes::Code bc; | |
| 1301 | |
| 1302 // receiver is NULL for static calls. An exception is thrown for NULL | |
| 1303 // receivers for non-static calls | |
| 1304 Handle receiver = find_callee_info(thread, bc, call_info, | |
| 1305 CHECK_(methodHandle())); | |
| 1306 // Compiler1 can produce virtual call sites that can actually be statically bound | |
| 1307 // If we fell thru to below we would think that the site was going megamorphic | |
| 1308 // when in fact the site can never miss. Worse because we'd think it was megamorphic | |
| 1309 // we'd try and do a vtable dispatch however methods that can be statically bound | |
| 1310 // don't have vtable entries (vtable_index < 0) and we'd blow up. So we force a | |
| 1311 // reresolution of the call site (as if we did a handle_wrong_method and not an | |
| 1312 // plain ic_miss) and the site will be converted to an optimized virtual call site | |
| 1313 // never to miss again. I don't believe C2 will produce code like this but if it | |
| 1314 // did this would still be the correct thing to do for it too, hence no ifdef. | |
| 1315 // | |
| 1316 if (call_info.resolved_method()->can_be_statically_bound()) { | |
| 1317 methodHandle callee_method = SharedRuntime::reresolve_call_site(thread, CHECK_(methodHandle())); | |
| 1318 if (TraceCallFixup) { | |
| 1319 RegisterMap reg_map(thread, false); | |
| 1320 frame caller_frame = thread->last_frame().sender(®_map); | |
| 1321 ResourceMark rm(thread); | |
| 1322 tty->print("converting IC miss to reresolve (%s) call to", Bytecodes::name(bc)); | |
| 1323 callee_method->print_short_name(tty); | |
| 1324 tty->print_cr(" from pc: " INTPTR_FORMAT, caller_frame.pc()); | |
| 1325 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
| 1326 } | |
| 1327 return callee_method; | |
| 1328 } | |
| 1329 | |
| 1330 methodHandle callee_method = call_info.selected_method(); | |
| 1331 | |
| 1332 bool should_be_mono = false; | |
| 1333 | |
| 1334 #ifndef PRODUCT | |
| 1335 Atomic::inc(&_ic_miss_ctr); | |
| 1336 | |
| 1337 // Statistics & Tracing | |
| 1338 if (TraceCallFixup) { | |
| 1339 ResourceMark rm(thread); | |
| 1340 tty->print("IC miss (%s) call to", Bytecodes::name(bc)); | |
| 1341 callee_method->print_short_name(tty); | |
| 1342 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
| 1343 } | |
| 1344 | |
| 1345 if (ICMissHistogram) { | |
| 1346 MutexLocker m(VMStatistic_lock); | |
| 1347 RegisterMap reg_map(thread, false); | |
| 1348 frame f = thread->last_frame().real_sender(®_map);// skip runtime stub | |
| 1349 // produce statistics under the lock | |
| 1350 trace_ic_miss(f.pc()); | |
| 1351 } | |
| 1352 #endif | |
| 1353 | |
| 1354 // install an event collector so that when a vtable stub is created the | |
| 1355 // profiler can be notified via a DYNAMIC_CODE_GENERATED event. The | |
| 1356 // event can't be posted when the stub is created as locks are held | |
| 1357 // - instead the event will be deferred until the event collector goes | |
| 1358 // out of scope. | |
| 1359 JvmtiDynamicCodeEventCollector event_collector; | |
| 1360 | |
| 1361 // Update inline cache to megamorphic. Skip update if caller has been | |
| 1362 // made non-entrant or we are called from interpreted. | |
| 1363 { MutexLocker ml_patch (CompiledIC_lock); | |
| 1364 RegisterMap reg_map(thread, false); | |
| 1365 frame caller_frame = thread->last_frame().sender(®_map); | |
| 1366 CodeBlob* cb = caller_frame.cb(); | |
| 1367 if (cb->is_nmethod() && ((nmethod*)cb)->is_in_use()) { | |
| 1368 // Not a non-entrant nmethod, so find inline_cache | |
| 1369 CompiledIC* inline_cache = CompiledIC_before(caller_frame.pc()); | |
| 1370 bool should_be_mono = false; | |
| 1371 if (inline_cache->is_optimized()) { | |
| 1372 if (TraceCallFixup) { | |
| 1373 ResourceMark rm(thread); | |
| 1374 tty->print("OPTIMIZED IC miss (%s) call to", Bytecodes::name(bc)); | |
| 1375 callee_method->print_short_name(tty); | |
| 1376 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
| 1377 } | |
| 1378 should_be_mono = true; | |
| 1379 } else { | |
| 1380 compiledICHolderOop ic_oop = (compiledICHolderOop) inline_cache->cached_oop(); | |
| 1381 if ( ic_oop != NULL && ic_oop->is_compiledICHolder()) { | |
| 1382 | |
| 1383 if (receiver()->klass() == ic_oop->holder_klass()) { | |
| 1384 // This isn't a real miss. We must have seen that compiled code | |
| 1385 // is now available and we want the call site converted to a | |
| 1386 // monomorphic compiled call site. | |
| 1387 // We can't assert for callee_method->code() != NULL because it | |
| 1388 // could have been deoptimized in the meantime | |
| 1389 if (TraceCallFixup) { | |
| 1390 ResourceMark rm(thread); | |
| 1391 tty->print("FALSE IC miss (%s) converting to compiled 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 } | |
| 1397 } | |
| 1398 } | |
| 1399 | |
| 1400 if (should_be_mono) { | |
| 1401 | |
| 1402 // We have a path that was monomorphic but was going interpreted | |
| 1403 // and now we have (or had) a compiled entry. We correct the IC | |
| 1404 // by using a new icBuffer. | |
| 1405 CompiledICInfo info; | |
| 1406 KlassHandle receiver_klass(THREAD, receiver()->klass()); | |
| 1407 inline_cache->compute_monomorphic_entry(callee_method, | |
| 1408 receiver_klass, | |
| 1409 inline_cache->is_optimized(), | |
| 1410 false, | |
| 1411 info, CHECK_(methodHandle())); | |
| 1412 inline_cache->set_to_monomorphic(info); | |
| 1413 } else if (!inline_cache->is_megamorphic() && !inline_cache->is_clean()) { | |
| 1414 // Change to megamorphic | |
| 1415 inline_cache->set_to_megamorphic(&call_info, bc, CHECK_(methodHandle())); | |
| 1416 } else { | |
| 1417 // Either clean or megamorphic | |
| 1418 } | |
| 1419 } | |
| 1420 } // Release CompiledIC_lock | |
| 1421 | |
| 1422 return callee_method; | |
| 1423 } | |
| 1424 | |
| 1425 // | |
| 1426 // Resets a call-site in compiled code so it will get resolved again. | |
| 1427 // This routines handles both virtual call sites, optimized virtual call | |
| 1428 // sites, and static call sites. Typically used to change a call sites | |
| 1429 // destination from compiled to interpreted. | |
| 1430 // | |
| 1431 methodHandle SharedRuntime::reresolve_call_site(JavaThread *thread, TRAPS) { | |
| 1432 ResourceMark rm(thread); | |
| 1433 RegisterMap reg_map(thread, false); | |
| 1434 frame stub_frame = thread->last_frame(); | |
| 1435 assert(stub_frame.is_runtime_frame(), "must be a runtimeStub"); | |
| 1436 frame caller = stub_frame.sender(®_map); | |
| 1437 | |
| 1438 // Do nothing if the frame isn't a live compiled frame. | |
| 1439 // nmethod could be deoptimized by the time we get here | |
| 1440 // so no update to the caller is needed. | |
| 1441 | |
| 1442 if (caller.is_compiled_frame() && !caller.is_deoptimized_frame()) { | |
| 1443 | |
| 1444 address pc = caller.pc(); | |
| 1445 Events::log("update call-site at pc " INTPTR_FORMAT, pc); | |
| 1446 | |
| 1447 // Default call_addr is the location of the "basic" call. | |
| 1448 // Determine the address of the call we a reresolving. With | |
| 1449 // Inline Caches we will always find a recognizable call. | |
| 1450 // With Inline Caches disabled we may or may not find a | |
| 1451 // recognizable call. We will always find a call for static | |
| 1452 // calls and for optimized virtual calls. For vanilla virtual | |
| 1453 // calls it depends on the state of the UseInlineCaches switch. | |
| 1454 // | |
| 1455 // With Inline Caches disabled we can get here for a virtual call | |
| 1456 // for two reasons: | |
| 1457 // 1 - calling an abstract method. The vtable for abstract methods | |
| 1458 // will run us thru handle_wrong_method and we will eventually | |
| 1459 // end up in the interpreter to throw the ame. | |
| 1460 // 2 - a racing deoptimization. We could be doing a vanilla vtable | |
| 1461 // call and between the time we fetch the entry address and | |
| 1462 // we jump to it the target gets deoptimized. Similar to 1 | |
| 1463 // we will wind up in the interprter (thru a c2i with c2). | |
| 1464 // | |
| 1465 address call_addr = NULL; | |
| 1466 { | |
| 1467 // Get call instruction under lock because another thread may be | |
| 1468 // busy patching it. | |
| 1469 MutexLockerEx ml_patch(Patching_lock, Mutex::_no_safepoint_check_flag); | |
| 1470 // Location of call instruction | |
| 1471 if (NativeCall::is_call_before(pc)) { | |
| 1472 NativeCall *ncall = nativeCall_before(pc); | |
| 1473 call_addr = ncall->instruction_address(); | |
| 1474 } | |
| 1475 } | |
| 1476 | |
| 1477 // Check for static or virtual call | |
| 1478 bool is_static_call = false; | |
| 1479 nmethod* caller_nm = CodeCache::find_nmethod(pc); | |
| 1480 // Make sure nmethod doesn't get deoptimized and removed until | |
| 1481 // this is done with it. | |
| 1482 // CLEANUP - with lazy deopt shouldn't need this lock | |
| 1483 nmethodLocker nmlock(caller_nm); | |
| 1484 | |
| 1485 if (call_addr != NULL) { | |
| 1486 RelocIterator iter(caller_nm, call_addr, call_addr+1); | |
| 1487 int ret = iter.next(); // Get item | |
| 1488 if (ret) { | |
| 1489 assert(iter.addr() == call_addr, "must find call"); | |
| 1490 if (iter.type() == relocInfo::static_call_type) { | |
| 1491 is_static_call = true; | |
| 1492 } else { | |
| 1493 assert(iter.type() == relocInfo::virtual_call_type || | |
| 1494 iter.type() == relocInfo::opt_virtual_call_type | |
| 1495 , "unexpected relocInfo. type"); | |
| 1496 } | |
| 1497 } else { | |
| 1498 assert(!UseInlineCaches, "relocation info. must exist for this address"); | |
| 1499 } | |
| 1500 | |
| 1501 // Cleaning the inline cache will force a new resolve. This is more robust | |
| 1502 // than directly setting it to the new destination, since resolving of calls | |
| 1503 // is always done through the same code path. (experience shows that it | |
| 1504 // leads to very hard to track down bugs, if an inline cache gets updated | |
| 1505 // to a wrong method). It should not be performance critical, since the | |
| 1506 // resolve is only done once. | |
| 1507 | |
| 1508 MutexLocker ml(CompiledIC_lock); | |
| 1509 // | |
| 1510 // We do not patch the call site if the nmethod has been made non-entrant | |
| 1511 // as it is a waste of time | |
| 1512 // | |
| 1513 if (caller_nm->is_in_use()) { | |
| 1514 if (is_static_call) { | |
| 1515 CompiledStaticCall* ssc= compiledStaticCall_at(call_addr); | |
| 1516 ssc->set_to_clean(); | |
| 1517 } else { | |
| 1518 // compiled, dispatched call (which used to call an interpreted method) | |
| 1519 CompiledIC* inline_cache = CompiledIC_at(call_addr); | |
| 1520 inline_cache->set_to_clean(); | |
| 1521 } | |
| 1522 } | |
| 1523 } | |
| 1524 | |
| 1525 } | |
| 1526 | |
| 1527 methodHandle callee_method = find_callee_method(thread, CHECK_(methodHandle())); | |
| 1528 | |
| 1529 | |
| 1530 #ifndef PRODUCT | |
| 1531 Atomic::inc(&_wrong_method_ctr); | |
| 1532 | |
| 1533 if (TraceCallFixup) { | |
| 1534 ResourceMark rm(thread); | |
| 1535 tty->print("handle_wrong_method reresolving call to"); | |
| 1536 callee_method->print_short_name(tty); | |
| 1537 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
| 1538 } | |
| 1539 #endif | |
| 1540 | |
| 1541 return callee_method; | |
| 1542 } | |
| 1543 | |
| 1544 // --------------------------------------------------------------------------- | |
| 1545 // We are calling the interpreter via a c2i. Normally this would mean that | |
| 1546 // we were called by a compiled method. However we could have lost a race | |
| 1547 // where we went int -> i2c -> c2i and so the caller could in fact be | |
| 1205 | 1548 // interpreted. If the caller is compiled we attempt to patch the caller |
| 0 | 1549 // so he no longer calls into the interpreter. |
| 1550 IRT_LEAF(void, SharedRuntime::fixup_callers_callsite(methodOopDesc* method, address caller_pc)) | |
| 1551 methodOop moop(method); | |
| 1552 | |
| 1553 address entry_point = moop->from_compiled_entry(); | |
| 1554 | |
| 1555 // It's possible that deoptimization can occur at a call site which hasn't | |
| 1556 // been resolved yet, in which case this function will be called from | |
| 1557 // an nmethod that has been patched for deopt and we can ignore the | |
| 1558 // request for a fixup. | |
| 1559 // Also it is possible that we lost a race in that from_compiled_entry | |
| 1560 // is now back to the i2c in that case we don't need to patch and if | |
| 1561 // we did we'd leap into space because the callsite needs to use | |
| 1562 // "to interpreter" stub in order to load up the methodOop. Don't | |
| 1563 // ask me how I know this... | |
| 1564 | |
| 1565 CodeBlob* cb = CodeCache::find_blob(caller_pc); | |
| 1205 | 1566 if (!cb->is_nmethod() || entry_point == moop->get_c2i_entry()) { |
| 1567 return; | |
| 1568 } | |
| 1569 | |
| 1570 // The check above makes sure this is a nmethod. | |
| 1571 nmethod* nm = cb->as_nmethod_or_null(); | |
| 1572 assert(nm, "must be"); | |
| 1573 | |
| 1574 // Don't fixup MethodHandle call sites as c2i/i2c adapters are used | |
| 1575 // to implement MethodHandle actions. | |
| 1576 if (nm->is_method_handle_return(caller_pc)) { | |
| 0 | 1577 return; |
| 1578 } | |
| 1579 | |
| 1580 // There is a benign race here. We could be attempting to patch to a compiled | |
| 1581 // entry point at the same time the callee is being deoptimized. If that is | |
| 1582 // the case then entry_point may in fact point to a c2i and we'd patch the | |
| 1583 // call site with the same old data. clear_code will set code() to NULL | |
| 1584 // at the end of it. If we happen to see that NULL then we can skip trying | |
| 1585 // to patch. If we hit the window where the callee has a c2i in the | |
| 1586 // from_compiled_entry and the NULL isn't present yet then we lose the race | |
| 1587 // and patch the code with the same old data. Asi es la vida. | |
| 1588 | |
| 1589 if (moop->code() == NULL) return; | |
| 1590 | |
| 1205 | 1591 if (nm->is_in_use()) { |
| 0 | 1592 |
| 1593 // Expect to find a native call there (unless it was no-inline cache vtable dispatch) | |
| 1594 MutexLockerEx ml_patch(Patching_lock, Mutex::_no_safepoint_check_flag); | |
| 1595 if (NativeCall::is_call_before(caller_pc + frame::pc_return_offset)) { | |
| 1596 NativeCall *call = nativeCall_before(caller_pc + frame::pc_return_offset); | |
| 1597 // | |
| 1598 // bug 6281185. We might get here after resolving a call site to a vanilla | |
| 1599 // virtual call. Because the resolvee uses the verified entry it may then | |
| 1600 // see compiled code and attempt to patch the site by calling us. This would | |
| 1601 // then incorrectly convert the call site to optimized and its downhill from | |
| 1602 // there. If you're lucky you'll get the assert in the bugid, if not you've | |
| 1603 // just made a call site that could be megamorphic into a monomorphic site | |
| 1604 // for the rest of its life! Just another racing bug in the life of | |
| 1605 // fixup_callers_callsite ... | |
| 1606 // | |
|
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1607 RelocIterator iter(nm, call->instruction_address(), call->next_instruction_address()); |
| 0 | 1608 iter.next(); |
| 1609 assert(iter.has_current(), "must have a reloc at java call site"); | |
| 1610 relocInfo::relocType typ = iter.reloc()->type(); | |
| 1611 if ( typ != relocInfo::static_call_type && | |
| 1612 typ != relocInfo::opt_virtual_call_type && | |
| 1613 typ != relocInfo::static_stub_type) { | |
| 1614 return; | |
| 1615 } | |
| 1616 address destination = call->destination(); | |
| 1617 if (destination != entry_point) { | |
| 1618 CodeBlob* callee = CodeCache::find_blob(destination); | |
| 1619 // callee == cb seems weird. It means calling interpreter thru stub. | |
| 1620 if (callee == cb || callee->is_adapter_blob()) { | |
| 1621 // static call or optimized virtual | |
| 1622 if (TraceCallFixup) { | |
| 1204 | 1623 tty->print("fixup callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); |
| 0 | 1624 moop->print_short_name(tty); |
| 1625 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
| 1626 } | |
| 1627 call->set_destination_mt_safe(entry_point); | |
| 1628 } else { | |
| 1629 if (TraceCallFixup) { | |
| 1630 tty->print("failed to fixup callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); | |
| 1631 moop->print_short_name(tty); | |
| 1632 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
| 1633 } | |
| 1634 // assert is too strong could also be resolve destinations. | |
| 1635 // assert(InlineCacheBuffer::contains(destination) || VtableStubs::contains(destination), "must be"); | |
| 1636 } | |
| 1637 } else { | |
| 1638 if (TraceCallFixup) { | |
| 1204 | 1639 tty->print("already patched callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); |
| 0 | 1640 moop->print_short_name(tty); |
| 1641 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
| 1642 } | |
| 1643 } | |
| 1644 } | |
| 1645 } | |
| 1646 | |
| 1647 IRT_END | |
| 1648 | |
| 1649 | |
| 1650 // same as JVM_Arraycopy, but called directly from compiled code | |
| 1651 JRT_ENTRY(void, SharedRuntime::slow_arraycopy_C(oopDesc* src, jint src_pos, | |
| 1652 oopDesc* dest, jint dest_pos, | |
| 1653 jint length, | |
| 1654 JavaThread* thread)) { | |
| 1655 #ifndef PRODUCT | |
| 1656 _slow_array_copy_ctr++; | |
| 1657 #endif | |
| 1658 // Check if we have null pointers | |
| 1659 if (src == NULL || dest == NULL) { | |
| 1660 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 1661 } | |
| 1662 // Do the copy. The casts to arrayOop are necessary to the copy_array API, | |
| 1663 // even though the copy_array API also performs dynamic checks to ensure | |
| 1664 // that src and dest are truly arrays (and are conformable). | |
| 1665 // The copy_array mechanism is awkward and could be removed, but | |
| 1666 // the compilers don't call this function except as a last resort, | |
| 1667 // so it probably doesn't matter. | |
| 1668 Klass::cast(src->klass())->copy_array((arrayOopDesc*)src, src_pos, | |
| 1669 (arrayOopDesc*)dest, dest_pos, | |
| 1670 length, thread); | |
| 1671 } | |
| 1672 JRT_END | |
| 1673 | |
| 1674 char* SharedRuntime::generate_class_cast_message( | |
| 1675 JavaThread* thread, const char* objName) { | |
| 1676 | |
| 1677 // Get target class name from the checkcast instruction | |
| 1678 vframeStream vfst(thread, true); | |
| 1679 assert(!vfst.at_end(), "Java frame must exist"); | |
| 2142 | 1680 Bytecode_checkcast cc(vfst.method(), vfst.method()->bcp_from(vfst.bci())); |
| 0 | 1681 Klass* targetKlass = Klass::cast(vfst.method()->constants()->klass_at( |
| 2142 | 1682 cc.index(), thread)); |
| 0 | 1683 return generate_class_cast_message(objName, targetKlass->external_name()); |
| 1684 } | |
| 1685 | |
| 710 | 1686 char* SharedRuntime::generate_wrong_method_type_message(JavaThread* thread, |
| 1687 oopDesc* required, | |
| 1688 oopDesc* actual) { | |
|
1793
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1689 if (TraceMethodHandles) { |
|
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1690 tty->print_cr("WrongMethodType thread="PTR_FORMAT" req="PTR_FORMAT" act="PTR_FORMAT"", |
|
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1691 thread, required, actual); |
|
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1692 } |
|
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1693 assert(EnableInvokeDynamic, ""); |
| 710 | 1694 oop singleKlass = wrong_method_type_is_for_single_argument(thread, required); |
|
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|
1695 char* message = NULL; |
| 710 | 1696 if (singleKlass != NULL) { |
| 1697 const char* objName = "argument or return value"; | |
| 1698 if (actual != NULL) { | |
| 1699 // be flexible about the junk passed in: | |
| 1700 klassOop ak = (actual->is_klass() | |
| 1701 ? (klassOop)actual | |
| 1702 : actual->klass()); | |
| 1703 objName = Klass::cast(ak)->external_name(); | |
| 1704 } | |
| 1705 Klass* targetKlass = Klass::cast(required->is_klass() | |
| 1706 ? (klassOop)required | |
| 1707 : java_lang_Class::as_klassOop(required)); | |
|
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1708 message = generate_class_cast_message(objName, targetKlass->external_name()); |
| 710 | 1709 } else { |
| 1710 // %%% need to get the MethodType string, without messing around too much | |
|
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|
1711 const char* desc = NULL; |
| 710 | 1712 // Get a signature from the invoke instruction |
| 1713 const char* mhName = "method handle"; | |
| 1714 const char* targetType = "the required signature"; | |
|
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1715 int targetArity = -1, mhArity = -1; |
| 710 | 1716 vframeStream vfst(thread, true); |
| 1717 if (!vfst.at_end()) { | |
| 2142 | 1718 Bytecode_invoke call(vfst.method(), vfst.bci()); |
| 710 | 1719 methodHandle target; |
| 1720 { | |
| 1721 EXCEPTION_MARK; | |
| 2142 | 1722 target = call.static_target(THREAD); |
| 710 | 1723 if (HAS_PENDING_EXCEPTION) { CLEAR_PENDING_EXCEPTION; } |
| 1724 } | |
| 1725 if (target.not_null() | |
| 1726 && target->is_method_handle_invoke() | |
| 1727 && required == target->method_handle_type()) { | |
| 1728 targetType = target->signature()->as_C_string(); | |
|
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|
1729 targetArity = ArgumentCount(target->signature()).size(); |
| 710 | 1730 } |
| 1731 } | |
|
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|
1732 KlassHandle kignore; int dmf_flags = 0; |
|
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|
1733 methodHandle actual_method = MethodHandles::decode_method(actual, kignore, dmf_flags); |
|
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1734 if ((dmf_flags & ~(MethodHandles::_dmf_has_receiver | |
|
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|
1735 MethodHandles::_dmf_does_dispatch | |
|
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|
1736 MethodHandles::_dmf_from_interface)) != 0) |
|
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|
1737 actual_method = methodHandle(); // MH does extra binds, drops, etc. |
|
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1738 bool has_receiver = ((dmf_flags & MethodHandles::_dmf_has_receiver) != 0); |
|
3274
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|
1739 if (actual_method.not_null()) { |
|
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1740 mhName = actual_method->signature()->as_C_string(); |
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1741 mhArity = ArgumentCount(actual_method->signature()).size(); |
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1742 if (!actual_method->is_static()) mhArity += 1; |
|
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1743 } else if (java_lang_invoke_MethodHandle::is_instance(actual)) { |
|
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1744 oopDesc* mhType = java_lang_invoke_MethodHandle::type(actual); |
|
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1745 mhArity = java_lang_invoke_MethodType::ptype_count(mhType); |
|
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1746 stringStream st; |
|
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1747 java_lang_invoke_MethodType::print_signature(mhType, &st); |
|
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1748 mhName = st.as_string(); |
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1749 } |
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1750 if (targetArity != -1 && targetArity != mhArity) { |
|
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1751 if (has_receiver && targetArity == mhArity-1) |
|
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1752 desc = " cannot be called without a receiver argument as "; |
| 710 | 1753 else |
|
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1754 desc = " cannot be called with a different arity as "; |
| 710 | 1755 } |
|
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|
1756 message = generate_class_cast_message(mhName, targetType, |
|
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1757 desc != NULL ? desc : |
|
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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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2049 case T_VOID: |
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2050 return in; |
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2051 |
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2052 default: |
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2053 ShouldNotReachHere(); |
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2054 return T_CONFLICT; |
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2055 } |
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2056 } |
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2057 |
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2058 public: |
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2059 AdapterFingerPrint(int total_args_passed, BasicType* sig_bt) { |
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2060 // The fingerprint is based on the BasicType signature encoded |
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2061 // into an array of ints with four entries per int. |
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2062 int* ptr; |
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2063 int len = (total_args_passed + 3) >> 2; |
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2064 if (len <= (int)(sizeof(_value._compact) / sizeof(int))) { |
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2065 _value._compact[0] = _value._compact[1] = _value._compact[2] = 0; |
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2066 // Storing the signature encoded as signed chars hits about 98% |
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2067 // of the time. |
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2068 _length = -len; |
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2069 ptr = _value._compact; |
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2070 } else { |
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2071 _length = len; |
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2072 _value._fingerprint = NEW_C_HEAP_ARRAY(int, _length); |
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2073 ptr = _value._fingerprint; |
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2074 } |
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2075 |
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2076 // Now pack the BasicTypes with 4 per int |
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2077 int sig_index = 0; |
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2078 for (int index = 0; index < len; index++) { |
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2079 int value = 0; |
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2080 for (int byte = 0; byte < 4; byte++) { |
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2081 if (sig_index < total_args_passed) { |
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2082 value = (value << 4) | adapter_encoding(sig_bt[sig_index++]); |
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2083 } |
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2084 } |
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2085 ptr[index] = value; |
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2086 } |
|
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2087 } |
|
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2088 |
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2089 ~AdapterFingerPrint() { |
|
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2090 if (_length > 0) { |
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2091 FREE_C_HEAP_ARRAY(int, _value._fingerprint); |
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2092 } |
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2093 } |
|
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2094 |
|
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2095 int value(int index) { |
|
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2096 if (_length < 0) { |
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2097 return _value._compact[index]; |
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2098 } |
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2099 return _value._fingerprint[index]; |
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2100 } |
|
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2101 int length() { |
|
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diff
changeset
|
2102 if (_length < 0) return -_length; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2103 return _length; |
|
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parents:
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diff
changeset
|
2104 } |
|
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diff
changeset
|
2105 |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2106 bool is_compact() { |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2107 return _length <= 0; |
|
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never
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1142
diff
changeset
|
2108 } |
|
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parents:
1142
diff
changeset
|
2109 |
|
cf0685d550f1
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diff
changeset
|
2110 unsigned int compute_hash() { |
|
1207
74c848d437ab
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1205
diff
changeset
|
2111 int hash = 0; |
|
1187
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changeset
|
2112 for (int i = 0; i < length(); i++) { |
|
1207
74c848d437ab
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|
2113 int v = value(i); |
|
1187
cf0685d550f1
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|
2114 hash = (hash << 8) ^ v ^ (hash >> 5); |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
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|
2115 } |
|
cf0685d550f1
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diff
changeset
|
2116 return (unsigned int)hash; |
|
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changeset
|
2117 } |
|
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changeset
|
2118 |
|
cf0685d550f1
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diff
changeset
|
2119 const char* as_string() { |
|
cf0685d550f1
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diff
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|
2120 stringStream st; |
|
cf0685d550f1
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|
2121 for (int i = 0; i < length(); i++) { |
|
cf0685d550f1
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|
2122 st.print(PTR_FORMAT, value(i)); |
|
cf0685d550f1
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diff
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|
2123 } |
|
cf0685d550f1
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changeset
|
2124 return st.as_string(); |
|
cf0685d550f1
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never
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changeset
|
2125 } |
|
cf0685d550f1
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changeset
|
2126 |
|
cf0685d550f1
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changeset
|
2127 bool equals(AdapterFingerPrint* other) { |
|
cf0685d550f1
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|
2128 if (other->_length != _length) { |
|
cf0685d550f1
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diff
changeset
|
2129 return false; |
|
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diff
changeset
|
2130 } |
|
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changeset
|
2131 if (_length < 0) { |
|
1207
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|
2132 return _value._compact[0] == other->_value._compact[0] && |
|
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|
2133 _value._compact[1] == other->_value._compact[1] && |
|
74c848d437ab
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|
2134 _value._compact[2] == other->_value._compact[2]; |
|
1187
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|
2135 } else { |
|
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changeset
|
2136 for (int i = 0; i < _length; i++) { |
|
cf0685d550f1
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changeset
|
2137 if (_value._fingerprint[i] != other->_value._fingerprint[i]) { |
|
cf0685d550f1
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diff
changeset
|
2138 return false; |
|
cf0685d550f1
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never
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diff
changeset
|
2139 } |
|
cf0685d550f1
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diff
changeset
|
2140 } |
|
cf0685d550f1
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parents:
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diff
changeset
|
2141 } |
|
cf0685d550f1
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diff
changeset
|
2142 return true; |
|
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never
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diff
changeset
|
2143 } |
|
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diff
changeset
|
2144 }; |
|
cf0685d550f1
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diff
changeset
|
2145 |
|
cf0685d550f1
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diff
changeset
|
2146 |
|
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changeset
|
2147 // A hashtable mapping from AdapterFingerPrints to AdapterHandlerEntries |
|
cf0685d550f1
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|
2148 class AdapterHandlerTable : public BasicHashtable { |
|
cf0685d550f1
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diff
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|
2149 friend class AdapterHandlerTableIterator; |
|
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changeset
|
2150 |
|
cf0685d550f1
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diff
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|
2151 private: |
|
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never
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1142
diff
changeset
|
2152 |
|
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
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1257
diff
changeset
|
2153 #ifndef PRODUCT |
|
1187
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|
2154 static int _lookups; // number of calls to lookup |
|
cf0685d550f1
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|
2155 static int _buckets; // number of buckets checked |
|
cf0685d550f1
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|
2156 static int _equals; // number of buckets checked with matching hash |
|
cf0685d550f1
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|
2157 static int _hits; // number of successful lookups |
|
cf0685d550f1
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|
2158 static int _compact; // number of equals calls with compact signature |
|
cf0685d550f1
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changeset
|
2159 #endif |
|
cf0685d550f1
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never
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diff
changeset
|
2160 |
|
cf0685d550f1
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diff
changeset
|
2161 AdapterHandlerEntry* bucket(int i) { |
|
cf0685d550f1
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changeset
|
2162 return (AdapterHandlerEntry*)BasicHashtable::bucket(i); |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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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
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diff
changeset
|
2165 public: |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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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:
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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
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diff
changeset
|
2170 AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) { |
|
cf0685d550f1
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never
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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:
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diff
changeset
|
2177 void add(AdapterHandlerEntry* entry) { |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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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:
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diff
changeset
|
2179 add_entry(index, entry); |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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diff
changeset
|
2180 } |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2181 |
|
1207
74c848d437ab
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diff
changeset
|
2182 void free_entry(AdapterHandlerEntry* entry) { |
|
74c848d437ab
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parents:
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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
never
parents:
1205
diff
changeset
|
2185 } |
|
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2186 |
|
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2187 // Find a entry with the same fingerprint if it exists |
|
1207
74c848d437ab
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never
parents:
1205
diff
changeset
|
2188 AdapterHandlerEntry* lookup(int total_args_passed, BasicType* sig_bt) { |
|
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
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1257
diff
changeset
|
2189 NOT_PRODUCT(_lookups++); |
|
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2190 AdapterFingerPrint fp(total_args_passed, sig_bt); |
|
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2191 unsigned int hash = fp.compute_hash(); |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2192 int index = hash_to_index(hash); |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2193 for (AdapterHandlerEntry* e = bucket(index); e != NULL; e = e->next()) { |
|
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
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1257
diff
changeset
|
2194 NOT_PRODUCT(_buckets++); |
|
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2195 if (e->hash() == hash) { |
|
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
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1257
diff
changeset
|
2196 NOT_PRODUCT(_equals++); |
|
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2197 if (fp.equals(e->fingerprint())) { |
|
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
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1257
diff
changeset
|
2198 #ifndef PRODUCT |
|
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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diff
changeset
|
2199 if (fp.is_compact()) _compact++; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2200 _hits++; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2201 #endif |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2202 return e; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2203 } |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2204 } |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2205 } |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2206 return NULL; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2207 } |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2208 |
|
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
diff
changeset
|
2209 #ifndef PRODUCT |
|
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2210 void print_statistics() { |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2211 ResourceMark rm; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2212 int longest = 0; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2213 int empty = 0; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2214 int total = 0; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2215 int nonempty = 0; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2216 for (int index = 0; index < table_size(); index++) { |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2217 int count = 0; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2218 for (AdapterHandlerEntry* e = bucket(index); e != NULL; e = e->next()) { |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2219 count++; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2220 } |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2221 if (count != 0) nonempty++; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2222 if (count == 0) empty++; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2223 if (count > longest) longest = count; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2224 total += count; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2225 } |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2226 tty->print_cr("AdapterHandlerTable: empty %d longest %d total %d average %f", |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2227 empty, longest, total, total / (double)nonempty); |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2228 tty->print_cr("AdapterHandlerTable: lookups %d buckets %d equals %d hits %d compact %d", |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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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 |
|
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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 |
|
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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++; |
|
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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 | |
|
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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; |
|
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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() { | |
|
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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(); | |
|
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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 | |
|
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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 | |
|
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|
2332 ResourceMark rm; |
|
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|
2333 |
| 1748 | 2334 NOT_PRODUCT(int insts_size); |
|
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|
2335 AdapterBlob* B = NULL; |
|
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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 |
|
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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, |
|
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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), |
|
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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); |
|
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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), | |
|
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|
2445 "%s(%s)@" PTR_FORMAT, |
|
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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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changeset
|
2490 if (length != _code_length) { |
|
74c848d437ab
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changeset
|
2491 return false; |
|
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|
2492 } |
|
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diff
changeset
|
2493 for (int i = 0; i < length; i++) { |
|
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diff
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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. | |
|
2405
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|
2507 nmethod *AdapterHandlerLibrary::create_native_wrapper(methodHandle method, int compile_id) { |
| 0 | 2508 ResourceMark rm; |
| 2509 nmethod* nm = NULL; | |
| 2510 | |
| 2511 assert(method->has_native_function(), "must have something valid to call!"); | |
| 2512 | |
| 2513 { | |
| 2514 // perform the work while holding the lock, but perform any printing outside the lock | |
| 2515 MutexLocker mu(AdapterHandlerLibrary_lock); | |
| 2516 // See if somebody beat us to it | |
| 2517 nm = method->code(); | |
| 2518 if (nm) { | |
| 2519 return nm; | |
| 2520 } | |
| 2521 | |
|
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|
2522 ResourceMark rm; |
| 0 | 2523 |
|
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|
2524 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
|
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|
2525 if (buf != NULL) { |
| 1748 | 2526 CodeBuffer buffer(buf); |
|
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|
2527 double locs_buf[20]; |
|
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changeset
|
2528 buffer.insts()->initialize_shared_locs((relocInfo*)locs_buf, sizeof(locs_buf) / sizeof(relocInfo)); |
|
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|
2529 MacroAssembler _masm(&buffer); |
|
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|
2530 |
|
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|
2531 // Fill in the signature array, for the calling-convention call. |
|
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|
2532 int total_args_passed = method->size_of_parameters(); |
| 0 | 2533 |
|
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|
2534 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType,total_args_passed); |
|
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|
2535 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair,total_args_passed); |
|
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|
2536 int i=0; |
|
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|
2537 if( !method->is_static() ) // Pass in receiver first |
|
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|
2538 sig_bt[i++] = T_OBJECT; |
|
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|
2539 SignatureStream ss(method->signature()); |
|
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|
2540 for( ; !ss.at_return_type(); ss.next()) { |
|
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|
2541 sig_bt[i++] = ss.type(); // Collect remaining bits of signature |
|
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|
2542 if( ss.type() == T_LONG || ss.type() == T_DOUBLE ) |
|
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|
2543 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
|
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|
2544 } |
|
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|
2545 assert( i==total_args_passed, "" ); |
|
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|
2546 BasicType ret_type = ss.type(); |
|
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|
2547 |
|
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|
2548 // Now get the compiled-Java layout as input arguments |
|
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|
2549 int comp_args_on_stack; |
|
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|
2550 comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed, false); |
|
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|
2551 |
|
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|
2552 // Generate the compiled-to-native wrapper code |
|
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|
2553 nm = SharedRuntime::generate_native_wrapper(&_masm, |
|
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|
2554 method, |
|
2405
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|
2555 compile_id, |
|
742
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changeset
|
2556 total_args_passed, |
|
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changeset
|
2557 comp_args_on_stack, |
|
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2558 sig_bt,regs, |
|
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2559 ret_type); |
| 0 | 2560 } |
| 2561 } | |
| 2562 | |
| 2563 // Must unlock before calling set_code | |
|
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2564 |
| 0 | 2565 // Install the generated code. |
| 2566 if (nm != NULL) { | |
|
2405
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2567 if (PrintCompilation) { |
|
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|
2568 ttyLocker ttyl; |
|
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|
2569 CompileTask::print_compilation(tty, nm, method->is_static() ? "(static)" : ""); |
|
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|
2570 } |
| 0 | 2571 method->set_code(method, nm); |
| 2572 nm->post_compiled_method_load_event(); | |
| 2573 } else { | |
| 2574 // CodeCache is full, disable compilation | |
| 1202 | 2575 CompileBroker::handle_full_code_cache(); |
| 0 | 2576 } |
| 2577 return nm; | |
| 2578 } | |
| 2579 | |
|
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2580 #ifdef HAVE_DTRACE_H |
|
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2581 // Create a dtrace nmethod for this method. The wrapper converts the |
|
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2582 // java compiled calling convention to the native convention, makes a dummy call |
|
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2583 // (actually nops for the size of the call instruction, which become a trap if |
|
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2584 // probe is enabled). The returns to the caller. Since this all looks like a |
|
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2585 // leaf no thread transition is needed. |
|
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2586 |
|
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2587 nmethod *AdapterHandlerLibrary::create_dtrace_nmethod(methodHandle method) { |
|
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2588 ResourceMark rm; |
|
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2589 nmethod* nm = NULL; |
|
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2590 |
|
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2591 if (PrintCompilation) { |
|
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2592 ttyLocker ttyl; |
|
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2593 tty->print("--- n%s "); |
|
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2594 method->print_short_name(tty); |
|
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2595 if (method->is_static()) { |
|
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2596 tty->print(" (static)"); |
|
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2597 } |
|
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|
2598 tty->cr(); |
|
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2599 } |
|
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|
2600 |
|
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|
2601 { |
|
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|
2602 // perform the work while holding the lock, but perform any printing |
|
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2603 // outside the lock |
|
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2604 MutexLocker mu(AdapterHandlerLibrary_lock); |
|
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2605 // See if somebody beat us to it |
|
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2606 nm = method->code(); |
|
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2607 if (nm) { |
|
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|
2608 return nm; |
|
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|
2609 } |
|
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|
2610 |
|
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|
2611 ResourceMark rm; |
|
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|
2612 |
|
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|
2613 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
|
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2614 if (buf != NULL) { |
| 1748 | 2615 CodeBuffer buffer(buf); |
|
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|
2616 // Need a few relocation entries |
|
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|
2617 double locs_buf[20]; |
|
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|
2618 buffer.insts()->initialize_shared_locs( |
|
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2619 (relocInfo*)locs_buf, sizeof(locs_buf) / sizeof(relocInfo)); |
|
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2620 MacroAssembler _masm(&buffer); |
|
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2621 |
|
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2622 // Generate the compiled-to-native wrapper code |
|
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2623 nm = SharedRuntime::generate_dtrace_nmethod(&_masm, method); |
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2624 } |
|
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2625 } |
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|
2626 return nm; |
|
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|
2627 } |
|
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2628 |
|
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|
2629 // the dtrace method needs to convert java lang string to utf8 string. |
|
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2630 void SharedRuntime::get_utf(oopDesc* src, address dst) { |
|
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2631 typeArrayOop jlsValue = java_lang_String::value(src); |
|
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2632 int jlsOffset = java_lang_String::offset(src); |
|
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2633 int jlsLen = java_lang_String::length(src); |
|
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2634 jchar* jlsPos = (jlsLen == 0) ? NULL : |
|
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2635 jlsValue->char_at_addr(jlsOffset); |
|
2192
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2636 assert(typeArrayKlass::cast(jlsValue->klass())->element_type() == T_CHAR, "compressed string"); |
|
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2637 (void) UNICODE::as_utf8(jlsPos, jlsLen, (char *)dst, max_dtrace_string_size); |
|
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2638 } |
|
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|
2639 #endif // ndef HAVE_DTRACE_H |
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2640 |
| 0 | 2641 // ------------------------------------------------------------------------- |
| 2642 // Java-Java calling convention | |
| 2643 // (what you use when Java calls Java) | |
| 2644 | |
| 2645 //------------------------------name_for_receiver---------------------------------- | |
| 2646 // For a given signature, return the VMReg for parameter 0. | |
| 2647 VMReg SharedRuntime::name_for_receiver() { | |
| 2648 VMRegPair regs; | |
| 2649 BasicType sig_bt = T_OBJECT; | |
| 2650 (void) java_calling_convention(&sig_bt, ®s, 1, true); | |
| 2651 // Return argument 0 register. In the LP64 build pointers | |
| 2652 // take 2 registers, but the VM wants only the 'main' name. | |
| 2653 return regs.first(); | |
| 2654 } | |
| 2655 | |
|
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2656 VMRegPair *SharedRuntime::find_callee_arguments(Symbol* sig, bool has_receiver, int* arg_size) { |
| 0 | 2657 // This method is returning a data structure allocating as a |
| 2658 // ResourceObject, so do not put any ResourceMarks in here. | |
| 2659 char *s = sig->as_C_string(); | |
| 2660 int len = (int)strlen(s); | |
| 2661 *s++; len--; // Skip opening paren | |
| 2662 char *t = s+len; | |
| 2663 while( *(--t) != ')' ) ; // Find close paren | |
| 2664 | |
| 2665 BasicType *sig_bt = NEW_RESOURCE_ARRAY( BasicType, 256 ); | |
| 2666 VMRegPair *regs = NEW_RESOURCE_ARRAY( VMRegPair, 256 ); | |
| 2667 int cnt = 0; | |
|
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|
2668 if (has_receiver) { |
| 0 | 2669 sig_bt[cnt++] = T_OBJECT; // Receiver is argument 0; not in signature |
| 2670 } | |
| 2671 | |
| 2672 while( s < t ) { | |
| 2673 switch( *s++ ) { // Switch on signature character | |
| 2674 case 'B': sig_bt[cnt++] = T_BYTE; break; | |
| 2675 case 'C': sig_bt[cnt++] = T_CHAR; break; | |
| 2676 case 'D': sig_bt[cnt++] = T_DOUBLE; sig_bt[cnt++] = T_VOID; break; | |
| 2677 case 'F': sig_bt[cnt++] = T_FLOAT; break; | |
| 2678 case 'I': sig_bt[cnt++] = T_INT; break; | |
| 2679 case 'J': sig_bt[cnt++] = T_LONG; sig_bt[cnt++] = T_VOID; break; | |
| 2680 case 'S': sig_bt[cnt++] = T_SHORT; break; | |
| 2681 case 'Z': sig_bt[cnt++] = T_BOOLEAN; break; | |
| 2682 case 'V': sig_bt[cnt++] = T_VOID; break; | |
| 2683 case 'L': // Oop | |
| 2684 while( *s++ != ';' ) ; // Skip signature | |
| 2685 sig_bt[cnt++] = T_OBJECT; | |
| 2686 break; | |
| 2687 case '[': { // Array | |
| 2688 do { // Skip optional size | |
| 2689 while( *s >= '0' && *s <= '9' ) s++; | |
| 2690 } while( *s++ == '[' ); // Nested arrays? | |
| 2691 // Skip element type | |
| 2692 if( s[-1] == 'L' ) | |
| 2693 while( *s++ != ';' ) ; // Skip signature | |
| 2694 sig_bt[cnt++] = T_ARRAY; | |
| 2695 break; | |
| 2696 } | |
| 2697 default : ShouldNotReachHere(); | |
| 2698 } | |
| 2699 } | |
| 2700 assert( cnt < 256, "grow table size" ); | |
| 2701 | |
| 2702 int comp_args_on_stack; | |
| 2703 comp_args_on_stack = java_calling_convention(sig_bt, regs, cnt, true); | |
| 2704 | |
| 2705 // the calling convention doesn't count out_preserve_stack_slots so | |
| 2706 // we must add that in to get "true" stack offsets. | |
| 2707 | |
| 2708 if (comp_args_on_stack) { | |
| 2709 for (int i = 0; i < cnt; i++) { | |
| 2710 VMReg reg1 = regs[i].first(); | |
| 2711 if( reg1->is_stack()) { | |
| 2712 // Yuck | |
| 2713 reg1 = reg1->bias(out_preserve_stack_slots()); | |
| 2714 } | |
| 2715 VMReg reg2 = regs[i].second(); | |
| 2716 if( reg2->is_stack()) { | |
| 2717 // Yuck | |
| 2718 reg2 = reg2->bias(out_preserve_stack_slots()); | |
| 2719 } | |
| 2720 regs[i].set_pair(reg2, reg1); | |
| 2721 } | |
| 2722 } | |
| 2723 | |
| 2724 // results | |
| 2725 *arg_size = cnt; | |
| 2726 return regs; | |
| 2727 } | |
| 2728 | |
| 2729 // OSR Migration Code | |
| 2730 // | |
| 2731 // This code is used convert interpreter frames into compiled frames. It is | |
| 2732 // called from very start of a compiled OSR nmethod. A temp array is | |
| 2733 // allocated to hold the interesting bits of the interpreter frame. All | |
| 2734 // active locks are inflated to allow them to move. The displaced headers and | |
| 2735 // active interpeter locals are copied into the temp buffer. Then we return | |
| 2736 // back to the compiled code. The compiled code then pops the current | |
| 2737 // interpreter frame off the stack and pushes a new compiled frame. Then it | |
| 2738 // copies the interpreter locals and displaced headers where it wants. | |
| 2739 // Finally it calls back to free the temp buffer. | |
| 2740 // | |
| 2741 // All of this is done NOT at any Safepoint, nor is any safepoint or GC allowed. | |
| 2742 | |
| 2743 JRT_LEAF(intptr_t*, SharedRuntime::OSR_migration_begin( JavaThread *thread) ) | |
| 2744 | |
| 2745 #ifdef IA64 | |
| 2746 ShouldNotReachHere(); // NYI | |
| 2747 #endif /* IA64 */ | |
| 2748 | |
| 2749 // | |
| 2750 // This code is dependent on the memory layout of the interpreter local | |
| 2751 // array and the monitors. On all of our platforms the layout is identical | |
| 2752 // so this code is shared. If some platform lays the their arrays out | |
| 2753 // differently then this code could move to platform specific code or | |
| 2754 // the code here could be modified to copy items one at a time using | |
| 2755 // frame accessor methods and be platform independent. | |
| 2756 | |
| 2757 frame fr = thread->last_frame(); | |
| 2758 assert( fr.is_interpreted_frame(), "" ); | |
| 2759 assert( fr.interpreter_frame_expression_stack_size()==0, "only handle empty stacks" ); | |
| 2760 | |
| 2761 // Figure out how many monitors are active. | |
| 2762 int active_monitor_count = 0; | |
| 2763 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); | |
| 2764 kptr < fr.interpreter_frame_monitor_begin(); | |
| 2765 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { | |
| 2766 if( kptr->obj() != NULL ) active_monitor_count++; | |
| 2767 } | |
| 2768 | |
| 2769 // QQQ we could place number of active monitors in the array so that compiled code | |
| 2770 // could double check it. | |
| 2771 | |
| 2772 methodOop moop = fr.interpreter_frame_method(); | |
| 2773 int max_locals = moop->max_locals(); | |
| 2774 // Allocate temp buffer, 1 word per local & 2 per active monitor | |
| 2775 int buf_size_words = max_locals + active_monitor_count*2; | |
| 2776 intptr_t *buf = NEW_C_HEAP_ARRAY(intptr_t,buf_size_words); | |
| 2777 | |
| 2778 // Copy the locals. Order is preserved so that loading of longs works. | |
| 2779 // Since there's no GC I can copy the oops blindly. | |
| 2780 assert( sizeof(HeapWord)==sizeof(intptr_t), "fix this code"); | |
| 1506 | 2781 Copy::disjoint_words((HeapWord*)fr.interpreter_frame_local_at(max_locals-1), |
| 0 | 2782 (HeapWord*)&buf[0], |
| 2783 max_locals); | |
| 2784 | |
| 2785 // Inflate locks. Copy the displaced headers. Be careful, there can be holes. | |
| 2786 int i = max_locals; | |
| 2787 for( BasicObjectLock *kptr2 = fr.interpreter_frame_monitor_end(); | |
| 2788 kptr2 < fr.interpreter_frame_monitor_begin(); | |
| 2789 kptr2 = fr.next_monitor_in_interpreter_frame(kptr2) ) { | |
| 2790 if( kptr2->obj() != NULL) { // Avoid 'holes' in the monitor array | |
| 2791 BasicLock *lock = kptr2->lock(); | |
| 2792 // Inflate so the displaced header becomes position-independent | |
| 2793 if (lock->displaced_header()->is_unlocked()) | |
| 2794 ObjectSynchronizer::inflate_helper(kptr2->obj()); | |
| 2795 // Now the displaced header is free to move | |
| 2796 buf[i++] = (intptr_t)lock->displaced_header(); | |
| 2797 buf[i++] = (intptr_t)kptr2->obj(); | |
| 2798 } | |
| 2799 } | |
| 2800 assert( i - max_locals == active_monitor_count*2, "found the expected number of monitors" ); | |
| 2801 | |
| 2802 return buf; | |
| 2803 JRT_END | |
| 2804 | |
| 2805 JRT_LEAF(void, SharedRuntime::OSR_migration_end( intptr_t* buf) ) | |
| 2806 FREE_C_HEAP_ARRAY(intptr_t,buf); | |
| 2807 JRT_END | |
| 2808 | |
| 2809 bool AdapterHandlerLibrary::contains(CodeBlob* b) { | |
|
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2810 AdapterHandlerTableIterator iter(_adapters); |
|
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2811 while (iter.has_next()) { |
|
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|
2812 AdapterHandlerEntry* a = iter.next(); |
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2813 if ( b == CodeCache::find_blob(a->get_i2c_entry()) ) return true; |
| 0 | 2814 } |
| 2815 return false; | |
| 2816 } | |
| 2817 | |
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2818 void AdapterHandlerLibrary::print_handler_on(outputStream* st, CodeBlob* b) { |
|
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2819 AdapterHandlerTableIterator iter(_adapters); |
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2820 while (iter.has_next()) { |
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2821 AdapterHandlerEntry* a = iter.next(); |
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2822 if ( b == CodeCache::find_blob(a->get_i2c_entry()) ) { |
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2823 st->print("Adapter for signature: "); |
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2824 st->print_cr("%s i2c: " INTPTR_FORMAT " c2i: " INTPTR_FORMAT " c2iUV: " INTPTR_FORMAT, |
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2825 a->fingerprint()->as_string(), |
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2826 a->get_i2c_entry(), a->get_c2i_entry(), a->get_c2i_unverified_entry()); |
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2827 |
| 0 | 2828 return; |
| 2829 } | |
| 2830 } | |
| 2831 assert(false, "Should have found handler"); | |
| 2832 } | |
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2833 |
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2834 #ifndef PRODUCT |
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2835 |
|
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2836 void AdapterHandlerLibrary::print_statistics() { |
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2837 _adapters->print_statistics(); |
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2838 } |
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2839 |
| 0 | 2840 #endif /* PRODUCT */ |