Mercurial > hg > truffle
annotate src/share/vm/runtime/sharedRuntime.cpp @ 1250:3f5b7efb9642
6920293: OptimizeStringConcat causing core dumps
Reviewed-by: kvn, twisti
| author | never |
|---|---|
| date | Fri, 05 Feb 2010 11:07:40 -0800 |
| parents | 74c848d437ab |
| children | 7b4415a18c8a |
| rev | line source |
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| 0 | 1 /* |
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2 * Copyright 1997-2010 Sun Microsystems, Inc. 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_sharedRuntime.cpp.incl" | |
| 27 #include <math.h> | |
| 28 | |
| 29 HS_DTRACE_PROBE_DECL4(hotspot, object__alloc, Thread*, char*, int, size_t); | |
| 30 HS_DTRACE_PROBE_DECL7(hotspot, method__entry, int, | |
| 31 char*, int, char*, int, char*, int); | |
| 32 HS_DTRACE_PROBE_DECL7(hotspot, method__return, int, | |
| 33 char*, int, char*, int, char*, int); | |
| 34 | |
| 35 // Implementation of SharedRuntime | |
| 36 | |
| 37 #ifndef PRODUCT | |
| 38 // For statistics | |
| 39 int SharedRuntime::_ic_miss_ctr = 0; | |
| 40 int SharedRuntime::_wrong_method_ctr = 0; | |
| 41 int SharedRuntime::_resolve_static_ctr = 0; | |
| 42 int SharedRuntime::_resolve_virtual_ctr = 0; | |
| 43 int SharedRuntime::_resolve_opt_virtual_ctr = 0; | |
| 44 int SharedRuntime::_implicit_null_throws = 0; | |
| 45 int SharedRuntime::_implicit_div0_throws = 0; | |
| 46 int SharedRuntime::_throw_null_ctr = 0; | |
| 47 | |
| 48 int SharedRuntime::_nof_normal_calls = 0; | |
| 49 int SharedRuntime::_nof_optimized_calls = 0; | |
| 50 int SharedRuntime::_nof_inlined_calls = 0; | |
| 51 int SharedRuntime::_nof_megamorphic_calls = 0; | |
| 52 int SharedRuntime::_nof_static_calls = 0; | |
| 53 int SharedRuntime::_nof_inlined_static_calls = 0; | |
| 54 int SharedRuntime::_nof_interface_calls = 0; | |
| 55 int SharedRuntime::_nof_optimized_interface_calls = 0; | |
| 56 int SharedRuntime::_nof_inlined_interface_calls = 0; | |
| 57 int SharedRuntime::_nof_megamorphic_interface_calls = 0; | |
| 58 int SharedRuntime::_nof_removable_exceptions = 0; | |
| 59 | |
| 60 int SharedRuntime::_new_instance_ctr=0; | |
| 61 int SharedRuntime::_new_array_ctr=0; | |
| 62 int SharedRuntime::_multi1_ctr=0; | |
| 63 int SharedRuntime::_multi2_ctr=0; | |
| 64 int SharedRuntime::_multi3_ctr=0; | |
| 65 int SharedRuntime::_multi4_ctr=0; | |
| 66 int SharedRuntime::_multi5_ctr=0; | |
| 67 int SharedRuntime::_mon_enter_stub_ctr=0; | |
| 68 int SharedRuntime::_mon_exit_stub_ctr=0; | |
| 69 int SharedRuntime::_mon_enter_ctr=0; | |
| 70 int SharedRuntime::_mon_exit_ctr=0; | |
| 71 int SharedRuntime::_partial_subtype_ctr=0; | |
| 72 int SharedRuntime::_jbyte_array_copy_ctr=0; | |
| 73 int SharedRuntime::_jshort_array_copy_ctr=0; | |
| 74 int SharedRuntime::_jint_array_copy_ctr=0; | |
| 75 int SharedRuntime::_jlong_array_copy_ctr=0; | |
| 76 int SharedRuntime::_oop_array_copy_ctr=0; | |
| 77 int SharedRuntime::_checkcast_array_copy_ctr=0; | |
| 78 int SharedRuntime::_unsafe_array_copy_ctr=0; | |
| 79 int SharedRuntime::_generic_array_copy_ctr=0; | |
| 80 int SharedRuntime::_slow_array_copy_ctr=0; | |
| 81 int SharedRuntime::_find_handler_ctr=0; | |
| 82 int SharedRuntime::_rethrow_ctr=0; | |
| 83 | |
| 84 int SharedRuntime::_ICmiss_index = 0; | |
| 85 int SharedRuntime::_ICmiss_count[SharedRuntime::maxICmiss_count]; | |
| 86 address SharedRuntime::_ICmiss_at[SharedRuntime::maxICmiss_count]; | |
| 87 | |
| 88 void SharedRuntime::trace_ic_miss(address at) { | |
| 89 for (int i = 0; i < _ICmiss_index; i++) { | |
| 90 if (_ICmiss_at[i] == at) { | |
| 91 _ICmiss_count[i]++; | |
| 92 return; | |
| 93 } | |
| 94 } | |
| 95 int index = _ICmiss_index++; | |
| 96 if (_ICmiss_index >= maxICmiss_count) _ICmiss_index = maxICmiss_count - 1; | |
| 97 _ICmiss_at[index] = at; | |
| 98 _ICmiss_count[index] = 1; | |
| 99 } | |
| 100 | |
| 101 void SharedRuntime::print_ic_miss_histogram() { | |
| 102 if (ICMissHistogram) { | |
| 103 tty->print_cr ("IC Miss Histogram:"); | |
| 104 int tot_misses = 0; | |
| 105 for (int i = 0; i < _ICmiss_index; i++) { | |
| 106 tty->print_cr(" at: " INTPTR_FORMAT " nof: %d", _ICmiss_at[i], _ICmiss_count[i]); | |
| 107 tot_misses += _ICmiss_count[i]; | |
| 108 } | |
| 109 tty->print_cr ("Total IC misses: %7d", tot_misses); | |
| 110 } | |
| 111 } | |
| 112 #endif // PRODUCT | |
| 113 | |
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114 #ifndef SERIALGC |
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115 |
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116 // G1 write-barrier pre: executed before a pointer store. |
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117 JRT_LEAF(void, SharedRuntime::g1_wb_pre(oopDesc* orig, JavaThread *thread)) |
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118 if (orig == NULL) { |
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119 assert(false, "should be optimized out"); |
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120 return; |
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121 } |
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122 assert(orig->is_oop(true /* ignore mark word */), "Error"); |
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123 // store the original value that was in the field reference |
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124 thread->satb_mark_queue().enqueue(orig); |
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125 JRT_END |
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126 |
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127 // G1 write-barrier post: executed after a pointer store. |
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128 JRT_LEAF(void, SharedRuntime::g1_wb_post(void* card_addr, JavaThread* thread)) |
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129 thread->dirty_card_queue().enqueue(card_addr); |
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130 JRT_END |
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131 |
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132 #endif // !SERIALGC |
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133 |
| 0 | 134 |
| 135 JRT_LEAF(jlong, SharedRuntime::lmul(jlong y, jlong x)) | |
| 136 return x * y; | |
| 137 JRT_END | |
| 138 | |
| 139 | |
| 140 JRT_LEAF(jlong, SharedRuntime::ldiv(jlong y, jlong x)) | |
| 141 if (x == min_jlong && y == CONST64(-1)) { | |
| 142 return x; | |
| 143 } else { | |
| 144 return x / y; | |
| 145 } | |
| 146 JRT_END | |
| 147 | |
| 148 | |
| 149 JRT_LEAF(jlong, SharedRuntime::lrem(jlong y, jlong x)) | |
| 150 if (x == min_jlong && y == CONST64(-1)) { | |
| 151 return 0; | |
| 152 } else { | |
| 153 return x % y; | |
| 154 } | |
| 155 JRT_END | |
| 156 | |
| 157 | |
| 158 const juint float_sign_mask = 0x7FFFFFFF; | |
| 159 const juint float_infinity = 0x7F800000; | |
| 160 const julong double_sign_mask = CONST64(0x7FFFFFFFFFFFFFFF); | |
| 161 const julong double_infinity = CONST64(0x7FF0000000000000); | |
| 162 | |
| 163 JRT_LEAF(jfloat, SharedRuntime::frem(jfloat x, jfloat y)) | |
| 164 #ifdef _WIN64 | |
| 165 // 64-bit Windows on amd64 returns the wrong values for | |
| 166 // infinity operands. | |
| 167 union { jfloat f; juint i; } xbits, ybits; | |
| 168 xbits.f = x; | |
| 169 ybits.f = y; | |
| 170 // x Mod Infinity == x unless x is infinity | |
| 171 if ( ((xbits.i & float_sign_mask) != float_infinity) && | |
| 172 ((ybits.i & float_sign_mask) == float_infinity) ) { | |
| 173 return x; | |
| 174 } | |
| 175 #endif | |
| 176 return ((jfloat)fmod((double)x,(double)y)); | |
| 177 JRT_END | |
| 178 | |
| 179 | |
| 180 JRT_LEAF(jdouble, SharedRuntime::drem(jdouble x, jdouble y)) | |
| 181 #ifdef _WIN64 | |
| 182 union { jdouble d; julong l; } xbits, ybits; | |
| 183 xbits.d = x; | |
| 184 ybits.d = y; | |
| 185 // x Mod Infinity == x unless x is infinity | |
| 186 if ( ((xbits.l & double_sign_mask) != double_infinity) && | |
| 187 ((ybits.l & double_sign_mask) == double_infinity) ) { | |
| 188 return x; | |
| 189 } | |
| 190 #endif | |
| 191 return ((jdouble)fmod((double)x,(double)y)); | |
| 192 JRT_END | |
| 193 | |
| 194 | |
| 195 JRT_LEAF(jint, SharedRuntime::f2i(jfloat x)) | |
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196 if (g_isnan(x)) |
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197 return 0; |
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198 if (x >= (jfloat) max_jint) |
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199 return max_jint; |
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200 if (x <= (jfloat) min_jint) |
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201 return min_jint; |
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202 return (jint) x; |
| 0 | 203 JRT_END |
| 204 | |
| 205 | |
| 206 JRT_LEAF(jlong, SharedRuntime::f2l(jfloat x)) | |
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207 if (g_isnan(x)) |
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208 return 0; |
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209 if (x >= (jfloat) max_jlong) |
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210 return max_jlong; |
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211 if (x <= (jfloat) min_jlong) |
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212 return min_jlong; |
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213 return (jlong) x; |
| 0 | 214 JRT_END |
| 215 | |
| 216 | |
| 217 JRT_LEAF(jint, SharedRuntime::d2i(jdouble x)) | |
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218 if (g_isnan(x)) |
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219 return 0; |
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220 if (x >= (jdouble) max_jint) |
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221 return max_jint; |
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222 if (x <= (jdouble) min_jint) |
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223 return min_jint; |
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224 return (jint) x; |
| 0 | 225 JRT_END |
| 226 | |
| 227 | |
| 228 JRT_LEAF(jlong, SharedRuntime::d2l(jdouble x)) | |
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229 if (g_isnan(x)) |
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230 return 0; |
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231 if (x >= (jdouble) max_jlong) |
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232 return max_jlong; |
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233 if (x <= (jdouble) min_jlong) |
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234 return min_jlong; |
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235 return (jlong) x; |
| 0 | 236 JRT_END |
| 237 | |
| 238 | |
| 239 JRT_LEAF(jfloat, SharedRuntime::d2f(jdouble x)) | |
| 240 return (jfloat)x; | |
| 241 JRT_END | |
| 242 | |
| 243 | |
| 244 JRT_LEAF(jfloat, SharedRuntime::l2f(jlong x)) | |
| 245 return (jfloat)x; | |
| 246 JRT_END | |
| 247 | |
| 248 | |
| 249 JRT_LEAF(jdouble, SharedRuntime::l2d(jlong x)) | |
| 250 return (jdouble)x; | |
| 251 JRT_END | |
| 252 | |
| 253 // Exception handling accross interpreter/compiler boundaries | |
| 254 // | |
| 255 // exception_handler_for_return_address(...) returns the continuation address. | |
| 256 // The continuation address is the entry point of the exception handler of the | |
| 257 // previous frame depending on the return address. | |
| 258 | |
| 259 address SharedRuntime::raw_exception_handler_for_return_address(address return_address) { | |
| 260 assert(frame::verify_return_pc(return_address), "must be a return pc"); | |
| 261 | |
| 262 // the fastest case first | |
| 263 CodeBlob* blob = CodeCache::find_blob(return_address); | |
| 264 if (blob != NULL && blob->is_nmethod()) { | |
| 265 nmethod* code = (nmethod*)blob; | |
| 266 assert(code != NULL, "nmethod must be present"); | |
| 267 // native nmethods don't have exception handlers | |
| 268 assert(!code->is_native_method(), "no exception handler"); | |
| 269 assert(code->header_begin() != code->exception_begin(), "no exception handler"); | |
| 270 if (code->is_deopt_pc(return_address)) { | |
| 271 return SharedRuntime::deopt_blob()->unpack_with_exception(); | |
| 272 } else { | |
| 273 return code->exception_begin(); | |
| 274 } | |
| 275 } | |
| 276 | |
| 277 // Entry code | |
| 278 if (StubRoutines::returns_to_call_stub(return_address)) { | |
| 279 return StubRoutines::catch_exception_entry(); | |
| 280 } | |
| 281 // Interpreted code | |
| 282 if (Interpreter::contains(return_address)) { | |
| 283 return Interpreter::rethrow_exception_entry(); | |
| 284 } | |
| 285 | |
| 286 // Compiled code | |
| 287 if (CodeCache::contains(return_address)) { | |
| 288 CodeBlob* blob = CodeCache::find_blob(return_address); | |
| 289 if (blob->is_nmethod()) { | |
| 290 nmethod* code = (nmethod*)blob; | |
| 291 assert(code != NULL, "nmethod must be present"); | |
| 292 assert(code->header_begin() != code->exception_begin(), "no exception handler"); | |
| 293 return code->exception_begin(); | |
| 294 } | |
| 295 if (blob->is_runtime_stub()) { | |
| 296 ShouldNotReachHere(); // callers are responsible for skipping runtime stub frames | |
| 297 } | |
| 298 } | |
| 299 guarantee(!VtableStubs::contains(return_address), "NULL exceptions in vtables should have been handled already!"); | |
| 300 #ifndef PRODUCT | |
| 301 { ResourceMark rm; | |
| 302 tty->print_cr("No exception handler found for exception at " INTPTR_FORMAT " - potential problems:", return_address); | |
| 303 tty->print_cr("a) exception happened in (new?) code stubs/buffers that is not handled here"); | |
| 304 tty->print_cr("b) other problem"); | |
| 305 } | |
| 306 #endif // PRODUCT | |
| 307 ShouldNotReachHere(); | |
| 308 return NULL; | |
| 309 } | |
| 310 | |
| 311 | |
| 312 JRT_LEAF(address, SharedRuntime::exception_handler_for_return_address(address return_address)) | |
| 313 return raw_exception_handler_for_return_address(return_address); | |
| 314 JRT_END | |
| 315 | |
| 316 address SharedRuntime::get_poll_stub(address pc) { | |
| 317 address stub; | |
| 318 // Look up the code blob | |
| 319 CodeBlob *cb = CodeCache::find_blob(pc); | |
| 320 | |
| 321 // Should be an nmethod | |
| 322 assert( cb && cb->is_nmethod(), "safepoint polling: pc must refer to an nmethod" ); | |
| 323 | |
| 324 // Look up the relocation information | |
| 325 assert( ((nmethod*)cb)->is_at_poll_or_poll_return(pc), | |
| 326 "safepoint polling: type must be poll" ); | |
| 327 | |
| 328 assert( ((NativeInstruction*)pc)->is_safepoint_poll(), | |
| 329 "Only polling locations are used for safepoint"); | |
| 330 | |
| 331 bool at_poll_return = ((nmethod*)cb)->is_at_poll_return(pc); | |
| 332 if (at_poll_return) { | |
| 333 assert(SharedRuntime::polling_page_return_handler_blob() != NULL, | |
| 334 "polling page return stub not created yet"); | |
| 335 stub = SharedRuntime::polling_page_return_handler_blob()->instructions_begin(); | |
| 336 } else { | |
| 337 assert(SharedRuntime::polling_page_safepoint_handler_blob() != NULL, | |
| 338 "polling page safepoint stub not created yet"); | |
| 339 stub = SharedRuntime::polling_page_safepoint_handler_blob()->instructions_begin(); | |
| 340 } | |
| 341 #ifndef PRODUCT | |
| 342 if( TraceSafepoint ) { | |
| 343 char buf[256]; | |
| 344 jio_snprintf(buf, sizeof(buf), | |
| 345 "... found polling page %s exception at pc = " | |
| 346 INTPTR_FORMAT ", stub =" INTPTR_FORMAT, | |
| 347 at_poll_return ? "return" : "loop", | |
| 348 (intptr_t)pc, (intptr_t)stub); | |
| 349 tty->print_raw_cr(buf); | |
| 350 } | |
| 351 #endif // PRODUCT | |
| 352 return stub; | |
| 353 } | |
| 354 | |
| 355 | |
| 356 oop SharedRuntime::retrieve_receiver( symbolHandle sig, frame caller ) { | |
| 357 assert(caller.is_interpreted_frame(), ""); | |
| 358 int args_size = ArgumentSizeComputer(sig).size() + 1; | |
| 359 assert(args_size <= caller.interpreter_frame_expression_stack_size(), "receiver must be on interpreter stack"); | |
| 360 oop result = (oop) *caller.interpreter_frame_tos_at(args_size - 1); | |
| 361 assert(Universe::heap()->is_in(result) && result->is_oop(), "receiver must be an oop"); | |
| 362 return result; | |
| 363 } | |
| 364 | |
| 365 | |
| 366 void SharedRuntime::throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception) { | |
| 367 if (JvmtiExport::can_post_exceptions()) { | |
| 368 vframeStream vfst(thread, true); | |
| 369 methodHandle method = methodHandle(thread, vfst.method()); | |
| 370 address bcp = method()->bcp_from(vfst.bci()); | |
| 371 JvmtiExport::post_exception_throw(thread, method(), bcp, h_exception()); | |
| 372 } | |
| 373 Exceptions::_throw(thread, __FILE__, __LINE__, h_exception); | |
| 374 } | |
| 375 | |
| 376 void SharedRuntime::throw_and_post_jvmti_exception(JavaThread *thread, symbolOop name, const char *message) { | |
| 377 Handle h_exception = Exceptions::new_exception(thread, name, message); | |
| 378 throw_and_post_jvmti_exception(thread, h_exception); | |
| 379 } | |
| 380 | |
|
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381 // The interpreter code to call this tracing function is only |
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382 // called/generated when TraceRedefineClasses has the right bits |
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383 // set. Since obsolete methods are never compiled, we don't have |
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384 // to modify the compilers to generate calls to this function. |
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385 // |
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386 JRT_LEAF(int, SharedRuntime::rc_trace_method_entry( |
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387 JavaThread* thread, methodOopDesc* method)) |
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388 assert(RC_TRACE_IN_RANGE(0x00001000, 0x00002000), "wrong call"); |
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389 |
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390 if (method->is_obsolete()) { |
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391 // We are calling an obsolete method, but this is not necessarily |
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392 // an error. Our method could have been redefined just after we |
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393 // fetched the methodOop from the constant pool. |
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394 |
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395 // RC_TRACE macro has an embedded ResourceMark |
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396 RC_TRACE_WITH_THREAD(0x00001000, thread, |
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397 ("calling obsolete method '%s'", |
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398 method->name_and_sig_as_C_string())); |
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399 if (RC_TRACE_ENABLED(0x00002000)) { |
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400 // this option is provided to debug calls to obsolete methods |
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401 guarantee(false, "faulting at call to an obsolete method."); |
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402 } |
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403 } |
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404 return 0; |
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405 JRT_END |
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406 |
| 0 | 407 // ret_pc points into caller; we are returning caller's exception handler |
| 408 // for given exception | |
| 409 address SharedRuntime::compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception, | |
| 410 bool force_unwind, bool top_frame_only) { | |
| 411 assert(nm != NULL, "must exist"); | |
| 412 ResourceMark rm; | |
| 413 | |
| 414 ScopeDesc* sd = nm->scope_desc_at(ret_pc); | |
| 415 // determine handler bci, if any | |
| 416 EXCEPTION_MARK; | |
| 417 | |
| 418 int handler_bci = -1; | |
| 419 int scope_depth = 0; | |
| 420 if (!force_unwind) { | |
| 421 int bci = sd->bci(); | |
| 422 do { | |
| 423 bool skip_scope_increment = false; | |
| 424 // exception handler lookup | |
| 425 KlassHandle ek (THREAD, exception->klass()); | |
| 426 handler_bci = sd->method()->fast_exception_handler_bci_for(ek, bci, THREAD); | |
| 427 if (HAS_PENDING_EXCEPTION) { | |
| 428 // We threw an exception while trying to find the exception handler. | |
| 429 // Transfer the new exception to the exception handle which will | |
| 430 // be set into thread local storage, and do another lookup for an | |
| 431 // exception handler for this exception, this time starting at the | |
| 432 // BCI of the exception handler which caused the exception to be | |
| 433 // thrown (bugs 4307310 and 4546590). Set "exception" reference | |
| 434 // argument to ensure that the correct exception is thrown (4870175). | |
| 435 exception = Handle(THREAD, PENDING_EXCEPTION); | |
| 436 CLEAR_PENDING_EXCEPTION; | |
| 437 if (handler_bci >= 0) { | |
| 438 bci = handler_bci; | |
| 439 handler_bci = -1; | |
| 440 skip_scope_increment = true; | |
| 441 } | |
| 442 } | |
| 443 if (!top_frame_only && handler_bci < 0 && !skip_scope_increment) { | |
| 444 sd = sd->sender(); | |
| 445 if (sd != NULL) { | |
| 446 bci = sd->bci(); | |
| 447 } | |
| 448 ++scope_depth; | |
| 449 } | |
| 450 } while (!top_frame_only && handler_bci < 0 && sd != NULL); | |
| 451 } | |
| 452 | |
| 453 // found handling method => lookup exception handler | |
| 454 int catch_pco = ret_pc - nm->instructions_begin(); | |
| 455 | |
| 456 ExceptionHandlerTable table(nm); | |
| 457 HandlerTableEntry *t = table.entry_for(catch_pco, handler_bci, scope_depth); | |
| 458 if (t == NULL && (nm->is_compiled_by_c1() || handler_bci != -1)) { | |
| 459 // Allow abbreviated catch tables. The idea is to allow a method | |
| 460 // to materialize its exceptions without committing to the exact | |
| 461 // routing of exceptions. In particular this is needed for adding | |
| 462 // a synthethic handler to unlock monitors when inlining | |
| 463 // synchonized methods since the unlock path isn't represented in | |
| 464 // the bytecodes. | |
| 465 t = table.entry_for(catch_pco, -1, 0); | |
| 466 } | |
| 467 | |
| 468 #ifdef COMPILER1 | |
| 469 if (nm->is_compiled_by_c1() && t == NULL && handler_bci == -1) { | |
| 470 // Exception is not handled by this frame so unwind. Note that | |
| 471 // this is not the same as how C2 does this. C2 emits a table | |
| 472 // entry that dispatches to the unwind code in the nmethod. | |
| 473 return NULL; | |
| 474 } | |
| 475 #endif /* COMPILER1 */ | |
| 476 | |
| 477 | |
| 478 if (t == NULL) { | |
| 479 tty->print_cr("MISSING EXCEPTION HANDLER for pc " INTPTR_FORMAT " and handler bci %d", ret_pc, handler_bci); | |
| 480 tty->print_cr(" Exception:"); | |
| 481 exception->print(); | |
| 482 tty->cr(); | |
| 483 tty->print_cr(" Compiled exception table :"); | |
| 484 table.print(); | |
| 485 nm->print_code(); | |
| 486 guarantee(false, "missing exception handler"); | |
| 487 return NULL; | |
| 488 } | |
| 489 | |
| 490 return nm->instructions_begin() + t->pco(); | |
| 491 } | |
| 492 | |
| 493 JRT_ENTRY(void, SharedRuntime::throw_AbstractMethodError(JavaThread* thread)) | |
| 494 // These errors occur only at call sites | |
| 495 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_AbstractMethodError()); | |
| 496 JRT_END | |
| 497 | |
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498 JRT_ENTRY(void, SharedRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) |
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499 // These errors occur only at call sites |
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500 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_IncompatibleClassChangeError(), "vtable stub"); |
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501 JRT_END |
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502 |
| 0 | 503 JRT_ENTRY(void, SharedRuntime::throw_ArithmeticException(JavaThread* thread)) |
| 504 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArithmeticException(), "/ by zero"); | |
| 505 JRT_END | |
| 506 | |
| 507 JRT_ENTRY(void, SharedRuntime::throw_NullPointerException(JavaThread* thread)) | |
| 508 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException()); | |
| 509 JRT_END | |
| 510 | |
| 511 JRT_ENTRY(void, SharedRuntime::throw_NullPointerException_at_call(JavaThread* thread)) | |
| 512 // This entry point is effectively only used for NullPointerExceptions which occur at inline | |
| 513 // cache sites (when the callee activation is not yet set up) so we are at a call site | |
| 514 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException()); | |
| 515 JRT_END | |
| 516 | |
| 517 JRT_ENTRY(void, SharedRuntime::throw_StackOverflowError(JavaThread* thread)) | |
| 518 // We avoid using the normal exception construction in this case because | |
| 519 // it performs an upcall to Java, and we're already out of stack space. | |
| 520 klassOop k = SystemDictionary::StackOverflowError_klass(); | |
| 521 oop exception_oop = instanceKlass::cast(k)->allocate_instance(CHECK); | |
| 522 Handle exception (thread, exception_oop); | |
| 523 if (StackTraceInThrowable) { | |
| 524 java_lang_Throwable::fill_in_stack_trace(exception); | |
| 525 } | |
| 526 throw_and_post_jvmti_exception(thread, exception); | |
| 527 JRT_END | |
| 528 | |
| 529 address SharedRuntime::continuation_for_implicit_exception(JavaThread* thread, | |
| 530 address pc, | |
| 531 SharedRuntime::ImplicitExceptionKind exception_kind) | |
| 532 { | |
| 533 address target_pc = NULL; | |
| 534 | |
| 535 if (Interpreter::contains(pc)) { | |
| 536 #ifdef CC_INTERP | |
| 537 // C++ interpreter doesn't throw implicit exceptions | |
| 538 ShouldNotReachHere(); | |
| 539 #else | |
| 540 switch (exception_kind) { | |
| 541 case IMPLICIT_NULL: return Interpreter::throw_NullPointerException_entry(); | |
| 542 case IMPLICIT_DIVIDE_BY_ZERO: return Interpreter::throw_ArithmeticException_entry(); | |
| 543 case STACK_OVERFLOW: return Interpreter::throw_StackOverflowError_entry(); | |
| 544 default: ShouldNotReachHere(); | |
| 545 } | |
| 546 #endif // !CC_INTERP | |
| 547 } else { | |
| 548 switch (exception_kind) { | |
| 549 case STACK_OVERFLOW: { | |
| 550 // Stack overflow only occurs upon frame setup; the callee is | |
| 551 // going to be unwound. Dispatch to a shared runtime stub | |
| 552 // which will cause the StackOverflowError to be fabricated | |
| 553 // and processed. | |
| 554 // For stack overflow in deoptimization blob, cleanup thread. | |
| 555 if (thread->deopt_mark() != NULL) { | |
| 556 Deoptimization::cleanup_deopt_info(thread, NULL); | |
| 557 } | |
| 558 return StubRoutines::throw_StackOverflowError_entry(); | |
| 559 } | |
| 560 | |
| 561 case IMPLICIT_NULL: { | |
| 562 if (VtableStubs::contains(pc)) { | |
| 563 // We haven't yet entered the callee frame. Fabricate an | |
| 564 // exception and begin dispatching it in the caller. Since | |
| 565 // the caller was at a call site, it's safe to destroy all | |
| 566 // caller-saved registers, as these entry points do. | |
| 567 VtableStub* vt_stub = VtableStubs::stub_containing(pc); | |
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568 |
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569 // If vt_stub is NULL, then return NULL to signal handler to report the SEGV error. |
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570 if (vt_stub == NULL) return NULL; |
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571 |
| 0 | 572 if (vt_stub->is_abstract_method_error(pc)) { |
| 573 assert(!vt_stub->is_vtable_stub(), "should never see AbstractMethodErrors from vtable-type VtableStubs"); | |
| 574 return StubRoutines::throw_AbstractMethodError_entry(); | |
| 575 } else { | |
| 576 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
| 577 } | |
| 578 } else { | |
| 579 CodeBlob* cb = CodeCache::find_blob(pc); | |
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580 |
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581 // If code blob is NULL, then return NULL to signal handler to report the SEGV error. |
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582 if (cb == NULL) return NULL; |
| 0 | 583 |
| 584 // Exception happened in CodeCache. Must be either: | |
| 585 // 1. Inline-cache check in C2I handler blob, | |
| 586 // 2. Inline-cache check in nmethod, or | |
| 587 // 3. Implict null exception in nmethod | |
| 588 | |
| 589 if (!cb->is_nmethod()) { | |
| 590 guarantee(cb->is_adapter_blob(), | |
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591 "exception happened outside interpreter, nmethods and vtable stubs (1)"); |
| 0 | 592 // There is no handler here, so we will simply unwind. |
| 593 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
| 594 } | |
| 595 | |
| 596 // Otherwise, it's an nmethod. Consult its exception handlers. | |
| 597 nmethod* nm = (nmethod*)cb; | |
| 598 if (nm->inlinecache_check_contains(pc)) { | |
| 599 // exception happened inside inline-cache check code | |
| 600 // => the nmethod is not yet active (i.e., the frame | |
| 601 // is not set up yet) => use return address pushed by | |
| 602 // caller => don't push another return address | |
| 603 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
| 604 } | |
| 605 | |
| 606 #ifndef PRODUCT | |
| 607 _implicit_null_throws++; | |
| 608 #endif | |
| 609 target_pc = nm->continuation_for_implicit_exception(pc); | |
| 1250 | 610 // If there's an unexpected fault, target_pc might be NULL, |
| 611 // in which case we want to fall through into the normal | |
| 612 // error handling code. | |
| 0 | 613 } |
| 614 | |
| 615 break; // fall through | |
| 616 } | |
| 617 | |
| 618 | |
| 619 case IMPLICIT_DIVIDE_BY_ZERO: { | |
| 620 nmethod* nm = CodeCache::find_nmethod(pc); | |
| 621 guarantee(nm != NULL, "must have containing nmethod for implicit division-by-zero exceptions"); | |
| 622 #ifndef PRODUCT | |
| 623 _implicit_div0_throws++; | |
| 624 #endif | |
| 625 target_pc = nm->continuation_for_implicit_exception(pc); | |
| 1250 | 626 // If there's an unexpected fault, target_pc might be NULL, |
| 627 // in which case we want to fall through into the normal | |
| 628 // error handling code. | |
| 0 | 629 break; // fall through |
| 630 } | |
| 631 | |
| 632 default: ShouldNotReachHere(); | |
| 633 } | |
| 634 | |
| 635 assert(exception_kind == IMPLICIT_NULL || exception_kind == IMPLICIT_DIVIDE_BY_ZERO, "wrong implicit exception kind"); | |
| 636 | |
| 637 // for AbortVMOnException flag | |
| 638 NOT_PRODUCT(Exceptions::debug_check_abort("java.lang.NullPointerException")); | |
| 639 if (exception_kind == IMPLICIT_NULL) { | |
| 640 Events::log("Implicit null exception at " INTPTR_FORMAT " to " INTPTR_FORMAT, pc, target_pc); | |
| 641 } else { | |
| 642 Events::log("Implicit division by zero exception at " INTPTR_FORMAT " to " INTPTR_FORMAT, pc, target_pc); | |
| 643 } | |
| 644 return target_pc; | |
| 645 } | |
| 646 | |
| 647 ShouldNotReachHere(); | |
| 648 return NULL; | |
| 649 } | |
| 650 | |
| 651 | |
| 652 JNI_ENTRY(void, throw_unsatisfied_link_error(JNIEnv* env, ...)) | |
| 653 { | |
| 654 THROW(vmSymbols::java_lang_UnsatisfiedLinkError()); | |
| 655 } | |
| 656 JNI_END | |
| 657 | |
| 658 | |
| 659 address SharedRuntime::native_method_throw_unsatisfied_link_error_entry() { | |
| 660 return CAST_FROM_FN_PTR(address, &throw_unsatisfied_link_error); | |
| 661 } | |
| 662 | |
| 663 | |
| 664 #ifndef PRODUCT | |
| 665 JRT_ENTRY(intptr_t, SharedRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2)) | |
| 666 const frame f = thread->last_frame(); | |
| 667 assert(f.is_interpreted_frame(), "must be an interpreted frame"); | |
| 668 #ifndef PRODUCT | |
| 669 methodHandle mh(THREAD, f.interpreter_frame_method()); | |
| 670 BytecodeTracer::trace(mh, f.interpreter_frame_bcp(), tos, tos2); | |
| 671 #endif // !PRODUCT | |
| 672 return preserve_this_value; | |
| 673 JRT_END | |
| 674 #endif // !PRODUCT | |
| 675 | |
| 676 | |
| 677 JRT_ENTRY(void, SharedRuntime::yield_all(JavaThread* thread, int attempts)) | |
| 678 os::yield_all(attempts); | |
| 679 JRT_END | |
| 680 | |
| 681 | |
| 682 JRT_ENTRY_NO_ASYNC(void, SharedRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) | |
| 683 assert(obj->is_oop(), "must be a valid oop"); | |
| 684 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise"); | |
| 685 instanceKlass::register_finalizer(instanceOop(obj), CHECK); | |
| 686 JRT_END | |
| 687 | |
| 688 | |
| 689 jlong SharedRuntime::get_java_tid(Thread* thread) { | |
| 690 if (thread != NULL) { | |
| 691 if (thread->is_Java_thread()) { | |
| 692 oop obj = ((JavaThread*)thread)->threadObj(); | |
| 693 return (obj == NULL) ? 0 : java_lang_Thread::thread_id(obj); | |
| 694 } | |
| 695 } | |
| 696 return 0; | |
| 697 } | |
| 698 | |
| 699 /** | |
| 700 * This function ought to be a void function, but cannot be because | |
| 701 * it gets turned into a tail-call on sparc, which runs into dtrace bug | |
| 702 * 6254741. Once that is fixed we can remove the dummy return value. | |
| 703 */ | |
| 704 int SharedRuntime::dtrace_object_alloc(oopDesc* o) { | |
| 705 return dtrace_object_alloc_base(Thread::current(), o); | |
| 706 } | |
| 707 | |
| 708 int SharedRuntime::dtrace_object_alloc_base(Thread* thread, oopDesc* o) { | |
| 709 assert(DTraceAllocProbes, "wrong call"); | |
| 710 Klass* klass = o->blueprint(); | |
| 711 int size = o->size(); | |
| 712 symbolOop name = klass->name(); | |
| 713 HS_DTRACE_PROBE4(hotspot, object__alloc, get_java_tid(thread), | |
| 714 name->bytes(), name->utf8_length(), size * HeapWordSize); | |
| 715 return 0; | |
| 716 } | |
| 717 | |
| 718 JRT_LEAF(int, SharedRuntime::dtrace_method_entry( | |
| 719 JavaThread* thread, methodOopDesc* method)) | |
| 720 assert(DTraceMethodProbes, "wrong call"); | |
| 721 symbolOop kname = method->klass_name(); | |
| 722 symbolOop name = method->name(); | |
| 723 symbolOop sig = method->signature(); | |
| 724 HS_DTRACE_PROBE7(hotspot, method__entry, get_java_tid(thread), | |
| 725 kname->bytes(), kname->utf8_length(), | |
| 726 name->bytes(), name->utf8_length(), | |
| 727 sig->bytes(), sig->utf8_length()); | |
| 728 return 0; | |
| 729 JRT_END | |
| 730 | |
| 731 JRT_LEAF(int, SharedRuntime::dtrace_method_exit( | |
| 732 JavaThread* thread, methodOopDesc* method)) | |
| 733 assert(DTraceMethodProbes, "wrong call"); | |
| 734 symbolOop kname = method->klass_name(); | |
| 735 symbolOop name = method->name(); | |
| 736 symbolOop sig = method->signature(); | |
| 737 HS_DTRACE_PROBE7(hotspot, method__return, get_java_tid(thread), | |
| 738 kname->bytes(), kname->utf8_length(), | |
| 739 name->bytes(), name->utf8_length(), | |
| 740 sig->bytes(), sig->utf8_length()); | |
| 741 return 0; | |
| 742 JRT_END | |
| 743 | |
| 744 | |
| 745 // Finds receiver, CallInfo (i.e. receiver method), and calling bytecode) | |
| 746 // for a call current in progress, i.e., arguments has been pushed on stack | |
| 747 // put callee has not been invoked yet. Used by: resolve virtual/static, | |
| 748 // vtable updates, etc. Caller frame must be compiled. | |
| 749 Handle SharedRuntime::find_callee_info(JavaThread* thread, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS) { | |
| 750 ResourceMark rm(THREAD); | |
| 751 | |
| 752 // last java frame on stack (which includes native call frames) | |
| 753 vframeStream vfst(thread, true); // Do not skip and javaCalls | |
| 754 | |
| 755 return find_callee_info_helper(thread, vfst, bc, callinfo, CHECK_(Handle())); | |
| 756 } | |
| 757 | |
| 758 | |
| 759 // Finds receiver, CallInfo (i.e. receiver method), and calling bytecode | |
| 760 // for a call current in progress, i.e., arguments has been pushed on stack | |
| 761 // but callee has not been invoked yet. Caller frame must be compiled. | |
| 762 Handle SharedRuntime::find_callee_info_helper(JavaThread* thread, | |
| 763 vframeStream& vfst, | |
| 764 Bytecodes::Code& bc, | |
| 765 CallInfo& callinfo, TRAPS) { | |
| 766 Handle receiver; | |
| 767 Handle nullHandle; //create a handy null handle for exception returns | |
| 768 | |
| 769 assert(!vfst.at_end(), "Java frame must exist"); | |
| 770 | |
| 771 // Find caller and bci from vframe | |
| 772 methodHandle caller (THREAD, vfst.method()); | |
| 773 int bci = vfst.bci(); | |
| 774 | |
| 775 // Find bytecode | |
| 776 Bytecode_invoke* bytecode = Bytecode_invoke_at(caller, bci); | |
| 777 bc = bytecode->adjusted_invoke_code(); | |
| 778 int bytecode_index = bytecode->index(); | |
| 779 | |
| 780 // Find receiver for non-static call | |
| 781 if (bc != Bytecodes::_invokestatic) { | |
| 782 // This register map must be update since we need to find the receiver for | |
| 783 // compiled frames. The receiver might be in a register. | |
| 784 RegisterMap reg_map2(thread); | |
| 785 frame stubFrame = thread->last_frame(); | |
| 786 // Caller-frame is a compiled frame | |
| 787 frame callerFrame = stubFrame.sender(®_map2); | |
| 788 | |
| 789 methodHandle callee = bytecode->static_target(CHECK_(nullHandle)); | |
| 790 if (callee.is_null()) { | |
| 791 THROW_(vmSymbols::java_lang_NoSuchMethodException(), nullHandle); | |
| 792 } | |
| 793 // Retrieve from a compiled argument list | |
| 794 receiver = Handle(THREAD, callerFrame.retrieve_receiver(®_map2)); | |
| 795 | |
| 796 if (receiver.is_null()) { | |
| 797 THROW_(vmSymbols::java_lang_NullPointerException(), nullHandle); | |
| 798 } | |
| 799 } | |
| 800 | |
| 801 // Resolve method. This is parameterized by bytecode. | |
| 802 constantPoolHandle constants (THREAD, caller->constants()); | |
| 803 assert (receiver.is_null() || receiver->is_oop(), "wrong receiver"); | |
| 804 LinkResolver::resolve_invoke(callinfo, receiver, constants, bytecode_index, bc, CHECK_(nullHandle)); | |
| 805 | |
| 806 #ifdef ASSERT | |
| 807 // Check that the receiver klass is of the right subtype and that it is initialized for virtual calls | |
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808 if (bc != Bytecodes::_invokestatic && bc != Bytecodes::_invokedynamic) { |
| 0 | 809 assert(receiver.not_null(), "should have thrown exception"); |
| 810 KlassHandle receiver_klass (THREAD, receiver->klass()); | |
| 811 klassOop rk = constants->klass_ref_at(bytecode_index, CHECK_(nullHandle)); | |
| 812 // klass is already loaded | |
| 813 KlassHandle static_receiver_klass (THREAD, rk); | |
| 814 assert(receiver_klass->is_subtype_of(static_receiver_klass()), "actual receiver must be subclass of static receiver klass"); | |
| 815 if (receiver_klass->oop_is_instance()) { | |
| 816 if (instanceKlass::cast(receiver_klass())->is_not_initialized()) { | |
| 817 tty->print_cr("ERROR: Klass not yet initialized!!"); | |
| 818 receiver_klass.print(); | |
| 819 } | |
| 820 assert (!instanceKlass::cast(receiver_klass())->is_not_initialized(), "receiver_klass must be initialized"); | |
| 821 } | |
| 822 } | |
| 823 #endif | |
| 824 | |
| 825 return receiver; | |
| 826 } | |
| 827 | |
| 828 methodHandle SharedRuntime::find_callee_method(JavaThread* thread, TRAPS) { | |
| 829 ResourceMark rm(THREAD); | |
| 830 // We need first to check if any Java activations (compiled, interpreted) | |
| 831 // exist on the stack since last JavaCall. If not, we need | |
| 832 // to get the target method from the JavaCall wrapper. | |
| 833 vframeStream vfst(thread, true); // Do not skip any javaCalls | |
| 834 methodHandle callee_method; | |
| 835 if (vfst.at_end()) { | |
| 836 // No Java frames were found on stack since we did the JavaCall. | |
| 837 // Hence the stack can only contain an entry_frame. We need to | |
| 838 // find the target method from the stub frame. | |
| 839 RegisterMap reg_map(thread, false); | |
| 840 frame fr = thread->last_frame(); | |
| 841 assert(fr.is_runtime_frame(), "must be a runtimeStub"); | |
| 842 fr = fr.sender(®_map); | |
| 843 assert(fr.is_entry_frame(), "must be"); | |
| 844 // fr is now pointing to the entry frame. | |
| 845 callee_method = methodHandle(THREAD, fr.entry_frame_call_wrapper()->callee_method()); | |
| 846 assert(fr.entry_frame_call_wrapper()->receiver() == NULL || !callee_method->is_static(), "non-null receiver for static call??"); | |
| 847 } else { | |
| 848 Bytecodes::Code bc; | |
| 849 CallInfo callinfo; | |
| 850 find_callee_info_helper(thread, vfst, bc, callinfo, CHECK_(methodHandle())); | |
| 851 callee_method = callinfo.selected_method(); | |
| 852 } | |
| 853 assert(callee_method()->is_method(), "must be"); | |
| 854 return callee_method; | |
| 855 } | |
| 856 | |
| 857 // Resolves a call. | |
| 858 methodHandle SharedRuntime::resolve_helper(JavaThread *thread, | |
| 859 bool is_virtual, | |
| 860 bool is_optimized, TRAPS) { | |
| 861 methodHandle callee_method; | |
| 862 callee_method = resolve_sub_helper(thread, is_virtual, is_optimized, THREAD); | |
| 863 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { | |
| 864 int retry_count = 0; | |
| 865 while (!HAS_PENDING_EXCEPTION && callee_method->is_old() && | |
| 1142 | 866 callee_method->method_holder() != SystemDictionary::Object_klass()) { |
| 0 | 867 // If has a pending exception then there is no need to re-try to |
| 868 // resolve this method. | |
| 869 // If the method has been redefined, we need to try again. | |
| 870 // Hack: we have no way to update the vtables of arrays, so don't | |
| 871 // require that java.lang.Object has been updated. | |
| 872 | |
| 873 // It is very unlikely that method is redefined more than 100 times | |
| 874 // in the middle of resolve. If it is looping here more than 100 times | |
| 875 // means then there could be a bug here. | |
| 876 guarantee((retry_count++ < 100), | |
| 877 "Could not resolve to latest version of redefined method"); | |
| 878 // method is redefined in the middle of resolve so re-try. | |
| 879 callee_method = resolve_sub_helper(thread, is_virtual, is_optimized, THREAD); | |
| 880 } | |
| 881 } | |
| 882 return callee_method; | |
| 883 } | |
| 884 | |
| 885 // Resolves a call. The compilers generate code for calls that go here | |
| 886 // and are patched with the real destination of the call. | |
| 887 methodHandle SharedRuntime::resolve_sub_helper(JavaThread *thread, | |
| 888 bool is_virtual, | |
| 889 bool is_optimized, TRAPS) { | |
| 890 | |
| 891 ResourceMark rm(thread); | |
| 892 RegisterMap cbl_map(thread, false); | |
| 893 frame caller_frame = thread->last_frame().sender(&cbl_map); | |
| 894 | |
| 895 CodeBlob* cb = caller_frame.cb(); | |
| 896 guarantee(cb != NULL && cb->is_nmethod(), "must be called from nmethod"); | |
| 897 // make sure caller is not getting deoptimized | |
| 898 // and removed before we are done with it. | |
| 899 // CLEANUP - with lazy deopt shouldn't need this lock | |
| 900 nmethodLocker caller_lock((nmethod*)cb); | |
| 901 | |
| 902 | |
| 903 // determine call info & receiver | |
| 904 // note: a) receiver is NULL for static calls | |
| 905 // b) an exception is thrown if receiver is NULL for non-static calls | |
| 906 CallInfo call_info; | |
| 907 Bytecodes::Code invoke_code = Bytecodes::_illegal; | |
| 908 Handle receiver = find_callee_info(thread, invoke_code, | |
| 909 call_info, CHECK_(methodHandle())); | |
| 910 methodHandle callee_method = call_info.selected_method(); | |
| 911 | |
| 912 assert((!is_virtual && invoke_code == Bytecodes::_invokestatic) || | |
| 913 ( is_virtual && invoke_code != Bytecodes::_invokestatic), "inconsistent bytecode"); | |
| 914 | |
| 915 #ifndef PRODUCT | |
| 916 // tracing/debugging/statistics | |
| 917 int *addr = (is_optimized) ? (&_resolve_opt_virtual_ctr) : | |
| 918 (is_virtual) ? (&_resolve_virtual_ctr) : | |
| 919 (&_resolve_static_ctr); | |
| 920 Atomic::inc(addr); | |
| 921 | |
| 922 if (TraceCallFixup) { | |
| 923 ResourceMark rm(thread); | |
| 924 tty->print("resolving %s%s (%s) call to", | |
| 925 (is_optimized) ? "optimized " : "", (is_virtual) ? "virtual" : "static", | |
| 926 Bytecodes::name(invoke_code)); | |
| 927 callee_method->print_short_name(tty); | |
| 928 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
| 929 } | |
| 930 #endif | |
| 931 | |
| 932 // Compute entry points. This might require generation of C2I converter | |
| 933 // frames, so we cannot be holding any locks here. Furthermore, the | |
| 934 // computation of the entry points is independent of patching the call. We | |
| 935 // always return the entry-point, but we only patch the stub if the call has | |
| 936 // not been deoptimized. Return values: For a virtual call this is an | |
| 937 // (cached_oop, destination address) pair. For a static call/optimized | |
| 938 // virtual this is just a destination address. | |
| 939 | |
| 940 StaticCallInfo static_call_info; | |
| 941 CompiledICInfo virtual_call_info; | |
| 942 | |
| 943 | |
| 944 // Make sure the callee nmethod does not get deoptimized and removed before | |
| 945 // we are done patching the code. | |
| 946 nmethod* nm = callee_method->code(); | |
| 947 nmethodLocker nl_callee(nm); | |
| 948 #ifdef ASSERT | |
| 949 address dest_entry_point = nm == NULL ? 0 : nm->entry_point(); // used below | |
| 950 #endif | |
| 951 | |
| 952 if (is_virtual) { | |
| 953 assert(receiver.not_null(), "sanity check"); | |
| 954 bool static_bound = call_info.resolved_method()->can_be_statically_bound(); | |
| 955 KlassHandle h_klass(THREAD, receiver->klass()); | |
| 956 CompiledIC::compute_monomorphic_entry(callee_method, h_klass, | |
| 957 is_optimized, static_bound, virtual_call_info, | |
| 958 CHECK_(methodHandle())); | |
| 959 } else { | |
| 960 // static call | |
| 961 CompiledStaticCall::compute_entry(callee_method, static_call_info); | |
| 962 } | |
| 963 | |
| 964 // grab lock, check for deoptimization and potentially patch caller | |
| 965 { | |
| 966 MutexLocker ml_patch(CompiledIC_lock); | |
| 967 | |
| 968 // Now that we are ready to patch if the methodOop was redefined then | |
| 969 // don't update call site and let the caller retry. | |
| 970 | |
| 971 if (!callee_method->is_old()) { | |
| 972 #ifdef ASSERT | |
| 973 // We must not try to patch to jump to an already unloaded method. | |
| 974 if (dest_entry_point != 0) { | |
| 975 assert(CodeCache::find_blob(dest_entry_point) != NULL, | |
| 976 "should not unload nmethod while locked"); | |
| 977 } | |
| 978 #endif | |
| 979 if (is_virtual) { | |
| 980 CompiledIC* inline_cache = CompiledIC_before(caller_frame.pc()); | |
| 981 if (inline_cache->is_clean()) { | |
| 982 inline_cache->set_to_monomorphic(virtual_call_info); | |
| 983 } | |
| 984 } else { | |
| 985 CompiledStaticCall* ssc = compiledStaticCall_before(caller_frame.pc()); | |
| 986 if (ssc->is_clean()) ssc->set(static_call_info); | |
| 987 } | |
| 988 } | |
| 989 | |
| 990 } // unlock CompiledIC_lock | |
| 991 | |
| 992 return callee_method; | |
| 993 } | |
| 994 | |
| 995 | |
| 996 // Inline caches exist only in compiled code | |
| 997 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_ic_miss(JavaThread* thread)) | |
| 998 #ifdef ASSERT | |
| 999 RegisterMap reg_map(thread, false); | |
| 1000 frame stub_frame = thread->last_frame(); | |
| 1001 assert(stub_frame.is_runtime_frame(), "sanity check"); | |
| 1002 frame caller_frame = stub_frame.sender(®_map); | |
| 1003 assert(!caller_frame.is_interpreted_frame() && !caller_frame.is_entry_frame(), "unexpected frame"); | |
| 1004 #endif /* ASSERT */ | |
| 1005 | |
| 1006 methodHandle callee_method; | |
| 1007 JRT_BLOCK | |
| 1008 callee_method = SharedRuntime::handle_ic_miss_helper(thread, CHECK_NULL); | |
| 1009 // Return methodOop through TLS | |
| 1010 thread->set_vm_result(callee_method()); | |
| 1011 JRT_BLOCK_END | |
| 1012 // return compiled code entry point after potential safepoints | |
| 1013 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
| 1014 return callee_method->verified_code_entry(); | |
| 1015 JRT_END | |
| 1016 | |
| 1017 | |
| 1018 // Handle call site that has been made non-entrant | |
| 1019 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method(JavaThread* thread)) | |
| 1020 // 6243940 We might end up in here if the callee is deoptimized | |
| 1021 // as we race to call it. We don't want to take a safepoint if | |
| 1022 // the caller was interpreted because the caller frame will look | |
| 1023 // interpreted to the stack walkers and arguments are now | |
| 1024 // "compiled" so it is much better to make this transition | |
| 1025 // invisible to the stack walking code. The i2c path will | |
| 1026 // place the callee method in the callee_target. It is stashed | |
| 1027 // there because if we try and find the callee by normal means a | |
| 1028 // safepoint is possible and have trouble gc'ing the compiled args. | |
| 1029 RegisterMap reg_map(thread, false); | |
| 1030 frame stub_frame = thread->last_frame(); | |
| 1031 assert(stub_frame.is_runtime_frame(), "sanity check"); | |
| 1032 frame caller_frame = stub_frame.sender(®_map); | |
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1033 |
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1034 // MethodHandle invokes don't have a CompiledIC and should always |
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1035 // simply redispatch to the callee_target. |
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1036 address sender_pc = caller_frame.pc(); |
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1037 CodeBlob* sender_cb = caller_frame.cb(); |
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1038 nmethod* sender_nm = sender_cb->as_nmethod_or_null(); |
| 1204 | 1039 bool is_mh_invoke_via_adapter = false; // Direct c2c call or via adapter? |
| 1040 if (sender_nm != NULL && sender_nm->is_method_handle_return(sender_pc)) { | |
| 1041 // If the callee_target is set, then we have come here via an i2c | |
| 1042 // adapter. | |
| 1043 methodOop callee = thread->callee_target(); | |
| 1044 if (callee != NULL) { | |
| 1045 assert(callee->is_method(), "sanity"); | |
| 1046 is_mh_invoke_via_adapter = true; | |
| 1047 } | |
| 1048 } | |
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1049 |
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1050 if (caller_frame.is_interpreted_frame() || |
| 1204 | 1051 caller_frame.is_entry_frame() || |
| 1052 is_mh_invoke_via_adapter) { | |
| 0 | 1053 methodOop callee = thread->callee_target(); |
| 1054 guarantee(callee != NULL && callee->is_method(), "bad handshake"); | |
| 1055 thread->set_vm_result(callee); | |
| 1056 thread->set_callee_target(NULL); | |
| 1057 return callee->get_c2i_entry(); | |
| 1058 } | |
| 1059 | |
| 1060 // Must be compiled to compiled path which is safe to stackwalk | |
| 1061 methodHandle callee_method; | |
| 1062 JRT_BLOCK | |
| 1063 // Force resolving of caller (if we called from compiled frame) | |
| 1064 callee_method = SharedRuntime::reresolve_call_site(thread, CHECK_NULL); | |
| 1065 thread->set_vm_result(callee_method()); | |
| 1066 JRT_BLOCK_END | |
| 1067 // return compiled code entry point after potential safepoints | |
| 1068 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
| 1069 return callee_method->verified_code_entry(); | |
| 1070 JRT_END | |
| 1071 | |
| 1072 | |
| 1073 // resolve a static call and patch code | |
| 1074 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_static_call_C(JavaThread *thread )) | |
| 1075 methodHandle callee_method; | |
| 1076 JRT_BLOCK | |
| 1077 callee_method = SharedRuntime::resolve_helper(thread, false, false, CHECK_NULL); | |
| 1078 thread->set_vm_result(callee_method()); | |
| 1079 JRT_BLOCK_END | |
| 1080 // return compiled code entry point after potential safepoints | |
| 1081 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
| 1082 return callee_method->verified_code_entry(); | |
| 1083 JRT_END | |
| 1084 | |
| 1085 | |
| 1086 // resolve virtual call and update inline cache to monomorphic | |
| 1087 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_virtual_call_C(JavaThread *thread )) | |
| 1088 methodHandle callee_method; | |
| 1089 JRT_BLOCK | |
| 1090 callee_method = SharedRuntime::resolve_helper(thread, true, false, CHECK_NULL); | |
| 1091 thread->set_vm_result(callee_method()); | |
| 1092 JRT_BLOCK_END | |
| 1093 // return compiled code entry point after potential safepoints | |
| 1094 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
| 1095 return callee_method->verified_code_entry(); | |
| 1096 JRT_END | |
| 1097 | |
| 1098 | |
| 1099 // Resolve a virtual call that can be statically bound (e.g., always | |
| 1100 // monomorphic, so it has no inline cache). Patch code to resolved target. | |
| 1101 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_opt_virtual_call_C(JavaThread *thread)) | |
| 1102 methodHandle callee_method; | |
| 1103 JRT_BLOCK | |
| 1104 callee_method = SharedRuntime::resolve_helper(thread, true, true, CHECK_NULL); | |
| 1105 thread->set_vm_result(callee_method()); | |
| 1106 JRT_BLOCK_END | |
| 1107 // return compiled code entry point after potential safepoints | |
| 1108 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
| 1109 return callee_method->verified_code_entry(); | |
| 1110 JRT_END | |
| 1111 | |
| 1112 | |
| 1113 | |
| 1114 | |
| 1115 | |
| 1116 methodHandle SharedRuntime::handle_ic_miss_helper(JavaThread *thread, TRAPS) { | |
| 1117 ResourceMark rm(thread); | |
| 1118 CallInfo call_info; | |
| 1119 Bytecodes::Code bc; | |
| 1120 | |
| 1121 // receiver is NULL for static calls. An exception is thrown for NULL | |
| 1122 // receivers for non-static calls | |
| 1123 Handle receiver = find_callee_info(thread, bc, call_info, | |
| 1124 CHECK_(methodHandle())); | |
| 1125 // Compiler1 can produce virtual call sites that can actually be statically bound | |
| 1126 // If we fell thru to below we would think that the site was going megamorphic | |
| 1127 // when in fact the site can never miss. Worse because we'd think it was megamorphic | |
| 1128 // we'd try and do a vtable dispatch however methods that can be statically bound | |
| 1129 // don't have vtable entries (vtable_index < 0) and we'd blow up. So we force a | |
| 1130 // reresolution of the call site (as if we did a handle_wrong_method and not an | |
| 1131 // plain ic_miss) and the site will be converted to an optimized virtual call site | |
| 1132 // never to miss again. I don't believe C2 will produce code like this but if it | |
| 1133 // did this would still be the correct thing to do for it too, hence no ifdef. | |
| 1134 // | |
| 1135 if (call_info.resolved_method()->can_be_statically_bound()) { | |
| 1136 methodHandle callee_method = SharedRuntime::reresolve_call_site(thread, CHECK_(methodHandle())); | |
| 1137 if (TraceCallFixup) { | |
| 1138 RegisterMap reg_map(thread, false); | |
| 1139 frame caller_frame = thread->last_frame().sender(®_map); | |
| 1140 ResourceMark rm(thread); | |
| 1141 tty->print("converting IC miss to reresolve (%s) call to", Bytecodes::name(bc)); | |
| 1142 callee_method->print_short_name(tty); | |
| 1143 tty->print_cr(" from pc: " INTPTR_FORMAT, caller_frame.pc()); | |
| 1144 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
| 1145 } | |
| 1146 return callee_method; | |
| 1147 } | |
| 1148 | |
| 1149 methodHandle callee_method = call_info.selected_method(); | |
| 1150 | |
| 1151 bool should_be_mono = false; | |
| 1152 | |
| 1153 #ifndef PRODUCT | |
| 1154 Atomic::inc(&_ic_miss_ctr); | |
| 1155 | |
| 1156 // Statistics & Tracing | |
| 1157 if (TraceCallFixup) { | |
| 1158 ResourceMark rm(thread); | |
| 1159 tty->print("IC miss (%s) call to", Bytecodes::name(bc)); | |
| 1160 callee_method->print_short_name(tty); | |
| 1161 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
| 1162 } | |
| 1163 | |
| 1164 if (ICMissHistogram) { | |
| 1165 MutexLocker m(VMStatistic_lock); | |
| 1166 RegisterMap reg_map(thread, false); | |
| 1167 frame f = thread->last_frame().real_sender(®_map);// skip runtime stub | |
| 1168 // produce statistics under the lock | |
| 1169 trace_ic_miss(f.pc()); | |
| 1170 } | |
| 1171 #endif | |
| 1172 | |
| 1173 // install an event collector so that when a vtable stub is created the | |
| 1174 // profiler can be notified via a DYNAMIC_CODE_GENERATED event. The | |
| 1175 // event can't be posted when the stub is created as locks are held | |
| 1176 // - instead the event will be deferred until the event collector goes | |
| 1177 // out of scope. | |
| 1178 JvmtiDynamicCodeEventCollector event_collector; | |
| 1179 | |
| 1180 // Update inline cache to megamorphic. Skip update if caller has been | |
| 1181 // made non-entrant or we are called from interpreted. | |
| 1182 { MutexLocker ml_patch (CompiledIC_lock); | |
| 1183 RegisterMap reg_map(thread, false); | |
| 1184 frame caller_frame = thread->last_frame().sender(®_map); | |
| 1185 CodeBlob* cb = caller_frame.cb(); | |
| 1186 if (cb->is_nmethod() && ((nmethod*)cb)->is_in_use()) { | |
| 1187 // Not a non-entrant nmethod, so find inline_cache | |
| 1188 CompiledIC* inline_cache = CompiledIC_before(caller_frame.pc()); | |
| 1189 bool should_be_mono = false; | |
| 1190 if (inline_cache->is_optimized()) { | |
| 1191 if (TraceCallFixup) { | |
| 1192 ResourceMark rm(thread); | |
| 1193 tty->print("OPTIMIZED IC miss (%s) call to", Bytecodes::name(bc)); | |
| 1194 callee_method->print_short_name(tty); | |
| 1195 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
| 1196 } | |
| 1197 should_be_mono = true; | |
| 1198 } else { | |
| 1199 compiledICHolderOop ic_oop = (compiledICHolderOop) inline_cache->cached_oop(); | |
| 1200 if ( ic_oop != NULL && ic_oop->is_compiledICHolder()) { | |
| 1201 | |
| 1202 if (receiver()->klass() == ic_oop->holder_klass()) { | |
| 1203 // This isn't a real miss. We must have seen that compiled code | |
| 1204 // is now available and we want the call site converted to a | |
| 1205 // monomorphic compiled call site. | |
| 1206 // We can't assert for callee_method->code() != NULL because it | |
| 1207 // could have been deoptimized in the meantime | |
| 1208 if (TraceCallFixup) { | |
| 1209 ResourceMark rm(thread); | |
| 1210 tty->print("FALSE IC miss (%s) converting to compiled call to", Bytecodes::name(bc)); | |
| 1211 callee_method->print_short_name(tty); | |
| 1212 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
| 1213 } | |
| 1214 should_be_mono = true; | |
| 1215 } | |
| 1216 } | |
| 1217 } | |
| 1218 | |
| 1219 if (should_be_mono) { | |
| 1220 | |
| 1221 // We have a path that was monomorphic but was going interpreted | |
| 1222 // and now we have (or had) a compiled entry. We correct the IC | |
| 1223 // by using a new icBuffer. | |
| 1224 CompiledICInfo info; | |
| 1225 KlassHandle receiver_klass(THREAD, receiver()->klass()); | |
| 1226 inline_cache->compute_monomorphic_entry(callee_method, | |
| 1227 receiver_klass, | |
| 1228 inline_cache->is_optimized(), | |
| 1229 false, | |
| 1230 info, CHECK_(methodHandle())); | |
| 1231 inline_cache->set_to_monomorphic(info); | |
| 1232 } else if (!inline_cache->is_megamorphic() && !inline_cache->is_clean()) { | |
| 1233 // Change to megamorphic | |
| 1234 inline_cache->set_to_megamorphic(&call_info, bc, CHECK_(methodHandle())); | |
| 1235 } else { | |
| 1236 // Either clean or megamorphic | |
| 1237 } | |
| 1238 } | |
| 1239 } // Release CompiledIC_lock | |
| 1240 | |
| 1241 return callee_method; | |
| 1242 } | |
| 1243 | |
| 1244 // | |
| 1245 // Resets a call-site in compiled code so it will get resolved again. | |
| 1246 // This routines handles both virtual call sites, optimized virtual call | |
| 1247 // sites, and static call sites. Typically used to change a call sites | |
| 1248 // destination from compiled to interpreted. | |
| 1249 // | |
| 1250 methodHandle SharedRuntime::reresolve_call_site(JavaThread *thread, TRAPS) { | |
| 1251 ResourceMark rm(thread); | |
| 1252 RegisterMap reg_map(thread, false); | |
| 1253 frame stub_frame = thread->last_frame(); | |
| 1254 assert(stub_frame.is_runtime_frame(), "must be a runtimeStub"); | |
| 1255 frame caller = stub_frame.sender(®_map); | |
| 1256 | |
| 1257 // Do nothing if the frame isn't a live compiled frame. | |
| 1258 // nmethod could be deoptimized by the time we get here | |
| 1259 // so no update to the caller is needed. | |
| 1260 | |
| 1261 if (caller.is_compiled_frame() && !caller.is_deoptimized_frame()) { | |
| 1262 | |
| 1263 address pc = caller.pc(); | |
| 1264 Events::log("update call-site at pc " INTPTR_FORMAT, pc); | |
| 1265 | |
| 1266 // Default call_addr is the location of the "basic" call. | |
| 1267 // Determine the address of the call we a reresolving. With | |
| 1268 // Inline Caches we will always find a recognizable call. | |
| 1269 // With Inline Caches disabled we may or may not find a | |
| 1270 // recognizable call. We will always find a call for static | |
| 1271 // calls and for optimized virtual calls. For vanilla virtual | |
| 1272 // calls it depends on the state of the UseInlineCaches switch. | |
| 1273 // | |
| 1274 // With Inline Caches disabled we can get here for a virtual call | |
| 1275 // for two reasons: | |
| 1276 // 1 - calling an abstract method. The vtable for abstract methods | |
| 1277 // will run us thru handle_wrong_method and we will eventually | |
| 1278 // end up in the interpreter to throw the ame. | |
| 1279 // 2 - a racing deoptimization. We could be doing a vanilla vtable | |
| 1280 // call and between the time we fetch the entry address and | |
| 1281 // we jump to it the target gets deoptimized. Similar to 1 | |
| 1282 // we will wind up in the interprter (thru a c2i with c2). | |
| 1283 // | |
| 1284 address call_addr = NULL; | |
| 1285 { | |
| 1286 // Get call instruction under lock because another thread may be | |
| 1287 // busy patching it. | |
| 1288 MutexLockerEx ml_patch(Patching_lock, Mutex::_no_safepoint_check_flag); | |
| 1289 // Location of call instruction | |
| 1290 if (NativeCall::is_call_before(pc)) { | |
| 1291 NativeCall *ncall = nativeCall_before(pc); | |
| 1292 call_addr = ncall->instruction_address(); | |
| 1293 } | |
| 1294 } | |
| 1295 | |
| 1296 // Check for static or virtual call | |
| 1297 bool is_static_call = false; | |
| 1298 nmethod* caller_nm = CodeCache::find_nmethod(pc); | |
| 1299 // Make sure nmethod doesn't get deoptimized and removed until | |
| 1300 // this is done with it. | |
| 1301 // CLEANUP - with lazy deopt shouldn't need this lock | |
| 1302 nmethodLocker nmlock(caller_nm); | |
| 1303 | |
| 1304 if (call_addr != NULL) { | |
| 1305 RelocIterator iter(caller_nm, call_addr, call_addr+1); | |
| 1306 int ret = iter.next(); // Get item | |
| 1307 if (ret) { | |
| 1308 assert(iter.addr() == call_addr, "must find call"); | |
| 1309 if (iter.type() == relocInfo::static_call_type) { | |
| 1310 is_static_call = true; | |
| 1311 } else { | |
| 1312 assert(iter.type() == relocInfo::virtual_call_type || | |
| 1313 iter.type() == relocInfo::opt_virtual_call_type | |
| 1314 , "unexpected relocInfo. type"); | |
| 1315 } | |
| 1316 } else { | |
| 1317 assert(!UseInlineCaches, "relocation info. must exist for this address"); | |
| 1318 } | |
| 1319 | |
| 1320 // Cleaning the inline cache will force a new resolve. This is more robust | |
| 1321 // than directly setting it to the new destination, since resolving of calls | |
| 1322 // is always done through the same code path. (experience shows that it | |
| 1323 // leads to very hard to track down bugs, if an inline cache gets updated | |
| 1324 // to a wrong method). It should not be performance critical, since the | |
| 1325 // resolve is only done once. | |
| 1326 | |
| 1327 MutexLocker ml(CompiledIC_lock); | |
| 1328 // | |
| 1329 // We do not patch the call site if the nmethod has been made non-entrant | |
| 1330 // as it is a waste of time | |
| 1331 // | |
| 1332 if (caller_nm->is_in_use()) { | |
| 1333 if (is_static_call) { | |
| 1334 CompiledStaticCall* ssc= compiledStaticCall_at(call_addr); | |
| 1335 ssc->set_to_clean(); | |
| 1336 } else { | |
| 1337 // compiled, dispatched call (which used to call an interpreted method) | |
| 1338 CompiledIC* inline_cache = CompiledIC_at(call_addr); | |
| 1339 inline_cache->set_to_clean(); | |
| 1340 } | |
| 1341 } | |
| 1342 } | |
| 1343 | |
| 1344 } | |
| 1345 | |
| 1346 methodHandle callee_method = find_callee_method(thread, CHECK_(methodHandle())); | |
| 1347 | |
| 1348 | |
| 1349 #ifndef PRODUCT | |
| 1350 Atomic::inc(&_wrong_method_ctr); | |
| 1351 | |
| 1352 if (TraceCallFixup) { | |
| 1353 ResourceMark rm(thread); | |
| 1354 tty->print("handle_wrong_method reresolving call to"); | |
| 1355 callee_method->print_short_name(tty); | |
| 1356 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
| 1357 } | |
| 1358 #endif | |
| 1359 | |
| 1360 return callee_method; | |
| 1361 } | |
| 1362 | |
| 1363 // --------------------------------------------------------------------------- | |
| 1364 // We are calling the interpreter via a c2i. Normally this would mean that | |
| 1365 // we were called by a compiled method. However we could have lost a race | |
| 1366 // where we went int -> i2c -> c2i and so the caller could in fact be | |
| 1205 | 1367 // interpreted. If the caller is compiled we attempt to patch the caller |
| 0 | 1368 // so he no longer calls into the interpreter. |
| 1369 IRT_LEAF(void, SharedRuntime::fixup_callers_callsite(methodOopDesc* method, address caller_pc)) | |
| 1370 methodOop moop(method); | |
| 1371 | |
| 1372 address entry_point = moop->from_compiled_entry(); | |
| 1373 | |
| 1374 // It's possible that deoptimization can occur at a call site which hasn't | |
| 1375 // been resolved yet, in which case this function will be called from | |
| 1376 // an nmethod that has been patched for deopt and we can ignore the | |
| 1377 // request for a fixup. | |
| 1378 // Also it is possible that we lost a race in that from_compiled_entry | |
| 1379 // is now back to the i2c in that case we don't need to patch and if | |
| 1380 // we did we'd leap into space because the callsite needs to use | |
| 1381 // "to interpreter" stub in order to load up the methodOop. Don't | |
| 1382 // ask me how I know this... | |
| 1383 | |
| 1384 CodeBlob* cb = CodeCache::find_blob(caller_pc); | |
| 1205 | 1385 if (!cb->is_nmethod() || entry_point == moop->get_c2i_entry()) { |
| 1386 return; | |
| 1387 } | |
| 1388 | |
| 1389 // The check above makes sure this is a nmethod. | |
| 1390 nmethod* nm = cb->as_nmethod_or_null(); | |
| 1391 assert(nm, "must be"); | |
| 1392 | |
| 1393 // Don't fixup MethodHandle call sites as c2i/i2c adapters are used | |
| 1394 // to implement MethodHandle actions. | |
| 1395 if (nm->is_method_handle_return(caller_pc)) { | |
| 0 | 1396 return; |
| 1397 } | |
| 1398 | |
| 1399 // There is a benign race here. We could be attempting to patch to a compiled | |
| 1400 // entry point at the same time the callee is being deoptimized. If that is | |
| 1401 // the case then entry_point may in fact point to a c2i and we'd patch the | |
| 1402 // call site with the same old data. clear_code will set code() to NULL | |
| 1403 // at the end of it. If we happen to see that NULL then we can skip trying | |
| 1404 // to patch. If we hit the window where the callee has a c2i in the | |
| 1405 // from_compiled_entry and the NULL isn't present yet then we lose the race | |
| 1406 // and patch the code with the same old data. Asi es la vida. | |
| 1407 | |
| 1408 if (moop->code() == NULL) return; | |
| 1409 | |
| 1205 | 1410 if (nm->is_in_use()) { |
| 0 | 1411 |
| 1412 // Expect to find a native call there (unless it was no-inline cache vtable dispatch) | |
| 1413 MutexLockerEx ml_patch(Patching_lock, Mutex::_no_safepoint_check_flag); | |
| 1414 if (NativeCall::is_call_before(caller_pc + frame::pc_return_offset)) { | |
| 1415 NativeCall *call = nativeCall_before(caller_pc + frame::pc_return_offset); | |
| 1416 // | |
| 1417 // bug 6281185. We might get here after resolving a call site to a vanilla | |
| 1418 // virtual call. Because the resolvee uses the verified entry it may then | |
| 1419 // see compiled code and attempt to patch the site by calling us. This would | |
| 1420 // then incorrectly convert the call site to optimized and its downhill from | |
| 1421 // there. If you're lucky you'll get the assert in the bugid, if not you've | |
| 1422 // just made a call site that could be megamorphic into a monomorphic site | |
| 1423 // for the rest of its life! Just another racing bug in the life of | |
| 1424 // fixup_callers_callsite ... | |
| 1425 // | |
| 1426 RelocIterator iter(cb, call->instruction_address(), call->next_instruction_address()); | |
| 1427 iter.next(); | |
| 1428 assert(iter.has_current(), "must have a reloc at java call site"); | |
| 1429 relocInfo::relocType typ = iter.reloc()->type(); | |
| 1430 if ( typ != relocInfo::static_call_type && | |
| 1431 typ != relocInfo::opt_virtual_call_type && | |
| 1432 typ != relocInfo::static_stub_type) { | |
| 1433 return; | |
| 1434 } | |
| 1435 address destination = call->destination(); | |
| 1436 if (destination != entry_point) { | |
| 1437 CodeBlob* callee = CodeCache::find_blob(destination); | |
| 1438 // callee == cb seems weird. It means calling interpreter thru stub. | |
| 1439 if (callee == cb || callee->is_adapter_blob()) { | |
| 1440 // static call or optimized virtual | |
| 1441 if (TraceCallFixup) { | |
| 1204 | 1442 tty->print("fixup callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); |
| 0 | 1443 moop->print_short_name(tty); |
| 1444 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
| 1445 } | |
| 1446 call->set_destination_mt_safe(entry_point); | |
| 1447 } else { | |
| 1448 if (TraceCallFixup) { | |
| 1449 tty->print("failed to fixup callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); | |
| 1450 moop->print_short_name(tty); | |
| 1451 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
| 1452 } | |
| 1453 // assert is too strong could also be resolve destinations. | |
| 1454 // assert(InlineCacheBuffer::contains(destination) || VtableStubs::contains(destination), "must be"); | |
| 1455 } | |
| 1456 } else { | |
| 1457 if (TraceCallFixup) { | |
| 1204 | 1458 tty->print("already patched callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); |
| 0 | 1459 moop->print_short_name(tty); |
| 1460 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
| 1461 } | |
| 1462 } | |
| 1463 } | |
| 1464 } | |
| 1465 | |
| 1466 IRT_END | |
| 1467 | |
| 1468 | |
| 1469 // same as JVM_Arraycopy, but called directly from compiled code | |
| 1470 JRT_ENTRY(void, SharedRuntime::slow_arraycopy_C(oopDesc* src, jint src_pos, | |
| 1471 oopDesc* dest, jint dest_pos, | |
| 1472 jint length, | |
| 1473 JavaThread* thread)) { | |
| 1474 #ifndef PRODUCT | |
| 1475 _slow_array_copy_ctr++; | |
| 1476 #endif | |
| 1477 // Check if we have null pointers | |
| 1478 if (src == NULL || dest == NULL) { | |
| 1479 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 1480 } | |
| 1481 // Do the copy. The casts to arrayOop are necessary to the copy_array API, | |
| 1482 // even though the copy_array API also performs dynamic checks to ensure | |
| 1483 // that src and dest are truly arrays (and are conformable). | |
| 1484 // The copy_array mechanism is awkward and could be removed, but | |
| 1485 // the compilers don't call this function except as a last resort, | |
| 1486 // so it probably doesn't matter. | |
| 1487 Klass::cast(src->klass())->copy_array((arrayOopDesc*)src, src_pos, | |
| 1488 (arrayOopDesc*)dest, dest_pos, | |
| 1489 length, thread); | |
| 1490 } | |
| 1491 JRT_END | |
| 1492 | |
| 1493 char* SharedRuntime::generate_class_cast_message( | |
| 1494 JavaThread* thread, const char* objName) { | |
| 1495 | |
| 1496 // Get target class name from the checkcast instruction | |
| 1497 vframeStream vfst(thread, true); | |
| 1498 assert(!vfst.at_end(), "Java frame must exist"); | |
| 1499 Bytecode_checkcast* cc = Bytecode_checkcast_at( | |
| 1500 vfst.method()->bcp_from(vfst.bci())); | |
| 1501 Klass* targetKlass = Klass::cast(vfst.method()->constants()->klass_at( | |
| 1502 cc->index(), thread)); | |
| 1503 return generate_class_cast_message(objName, targetKlass->external_name()); | |
| 1504 } | |
| 1505 | |
| 710 | 1506 char* SharedRuntime::generate_wrong_method_type_message(JavaThread* thread, |
| 1507 oopDesc* required, | |
| 1508 oopDesc* actual) { | |
| 1509 assert(EnableMethodHandles, ""); | |
| 1510 oop singleKlass = wrong_method_type_is_for_single_argument(thread, required); | |
| 1511 if (singleKlass != NULL) { | |
| 1512 const char* objName = "argument or return value"; | |
| 1513 if (actual != NULL) { | |
| 1514 // be flexible about the junk passed in: | |
| 1515 klassOop ak = (actual->is_klass() | |
| 1516 ? (klassOop)actual | |
| 1517 : actual->klass()); | |
| 1518 objName = Klass::cast(ak)->external_name(); | |
| 1519 } | |
| 1520 Klass* targetKlass = Klass::cast(required->is_klass() | |
| 1521 ? (klassOop)required | |
| 1522 : java_lang_Class::as_klassOop(required)); | |
| 1523 return generate_class_cast_message(objName, targetKlass->external_name()); | |
| 1524 } else { | |
| 1525 // %%% need to get the MethodType string, without messing around too much | |
| 1526 // Get a signature from the invoke instruction | |
| 1527 const char* mhName = "method handle"; | |
| 1528 const char* targetType = "the required signature"; | |
| 1529 vframeStream vfst(thread, true); | |
| 1530 if (!vfst.at_end()) { | |
| 1531 Bytecode_invoke* call = Bytecode_invoke_at(vfst.method(), vfst.bci()); | |
| 1532 methodHandle target; | |
| 1533 { | |
| 1534 EXCEPTION_MARK; | |
| 1535 target = call->static_target(THREAD); | |
| 1536 if (HAS_PENDING_EXCEPTION) { CLEAR_PENDING_EXCEPTION; } | |
| 1537 } | |
| 1538 if (target.not_null() | |
| 1539 && target->is_method_handle_invoke() | |
| 1540 && required == target->method_handle_type()) { | |
| 1541 targetType = target->signature()->as_C_string(); | |
| 1542 } | |
| 1543 } | |
| 1544 klassOop kignore; int fignore; | |
| 1545 methodOop actual_method = MethodHandles::decode_method(actual, | |
| 1546 kignore, fignore); | |
| 1547 if (actual_method != NULL) { | |
| 1548 if (actual_method->name() == vmSymbols::invoke_name()) | |
| 1549 mhName = "$"; | |
| 1550 else | |
| 1551 mhName = actual_method->signature()->as_C_string(); | |
| 1552 if (mhName[0] == '$') | |
| 1553 mhName = actual_method->signature()->as_C_string(); | |
| 1554 } | |
| 1555 return generate_class_cast_message(mhName, targetType, | |
| 1556 " cannot be called as "); | |
| 1557 } | |
| 1558 } | |
| 1559 | |
| 1560 oop SharedRuntime::wrong_method_type_is_for_single_argument(JavaThread* thr, | |
| 1561 oopDesc* required) { | |
| 1562 if (required == NULL) return NULL; | |
| 1142 | 1563 if (required->klass() == SystemDictionary::Class_klass()) |
| 710 | 1564 return required; |
| 1565 if (required->is_klass()) | |
| 1566 return Klass::cast(klassOop(required))->java_mirror(); | |
| 1567 return NULL; | |
| 1568 } | |
| 1569 | |
| 1570 | |
| 0 | 1571 char* SharedRuntime::generate_class_cast_message( |
| 710 | 1572 const char* objName, const char* targetKlassName, const char* desc) { |
| 0 | 1573 size_t msglen = strlen(objName) + strlen(desc) + strlen(targetKlassName) + 1; |
| 1574 | |
| 53 | 1575 char* message = NEW_RESOURCE_ARRAY(char, msglen); |
| 0 | 1576 if (NULL == message) { |
| 53 | 1577 // Shouldn't happen, but don't cause even more problems if it does |
| 0 | 1578 message = const_cast<char*>(objName); |
| 1579 } else { | |
| 1580 jio_snprintf(message, msglen, "%s%s%s", objName, desc, targetKlassName); | |
| 1581 } | |
| 1582 return message; | |
| 1583 } | |
| 1584 | |
| 1585 JRT_LEAF(void, SharedRuntime::reguard_yellow_pages()) | |
| 1586 (void) JavaThread::current()->reguard_stack(); | |
| 1587 JRT_END | |
| 1588 | |
| 1589 | |
| 1590 // Handles the uncommon case in locking, i.e., contention or an inflated lock. | |
| 1591 #ifndef PRODUCT | |
| 1592 int SharedRuntime::_monitor_enter_ctr=0; | |
| 1593 #endif | |
| 1594 JRT_ENTRY_NO_ASYNC(void, SharedRuntime::complete_monitor_locking_C(oopDesc* _obj, BasicLock* lock, JavaThread* thread)) | |
| 1595 oop obj(_obj); | |
| 1596 #ifndef PRODUCT | |
| 1597 _monitor_enter_ctr++; // monitor enter slow | |
| 1598 #endif | |
| 1599 if (PrintBiasedLockingStatistics) { | |
| 1600 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); | |
| 1601 } | |
| 1602 Handle h_obj(THREAD, obj); | |
| 1603 if (UseBiasedLocking) { | |
| 1604 // Retry fast entry if bias is revoked to avoid unnecessary inflation | |
| 1605 ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK); | |
| 1606 } else { | |
| 1607 ObjectSynchronizer::slow_enter(h_obj, lock, CHECK); | |
| 1608 } | |
| 1609 assert(!HAS_PENDING_EXCEPTION, "Should have no exception here"); | |
| 1610 JRT_END | |
| 1611 | |
| 1612 #ifndef PRODUCT | |
| 1613 int SharedRuntime::_monitor_exit_ctr=0; | |
| 1614 #endif | |
| 1615 // Handles the uncommon cases of monitor unlocking in compiled code | |
| 1616 JRT_LEAF(void, SharedRuntime::complete_monitor_unlocking_C(oopDesc* _obj, BasicLock* lock)) | |
| 1617 oop obj(_obj); | |
| 1618 #ifndef PRODUCT | |
| 1619 _monitor_exit_ctr++; // monitor exit slow | |
| 1620 #endif | |
| 1621 Thread* THREAD = JavaThread::current(); | |
| 1622 // I'm not convinced we need the code contained by MIGHT_HAVE_PENDING anymore | |
| 1623 // testing was unable to ever fire the assert that guarded it so I have removed it. | |
| 1624 assert(!HAS_PENDING_EXCEPTION, "Do we need code below anymore?"); | |
| 1625 #undef MIGHT_HAVE_PENDING | |
| 1626 #ifdef MIGHT_HAVE_PENDING | |
| 1627 // Save and restore any pending_exception around the exception mark. | |
| 1628 // While the slow_exit must not throw an exception, we could come into | |
| 1629 // this routine with one set. | |
| 1630 oop pending_excep = NULL; | |
| 1631 const char* pending_file; | |
| 1632 int pending_line; | |
| 1633 if (HAS_PENDING_EXCEPTION) { | |
| 1634 pending_excep = PENDING_EXCEPTION; | |
| 1635 pending_file = THREAD->exception_file(); | |
| 1636 pending_line = THREAD->exception_line(); | |
| 1637 CLEAR_PENDING_EXCEPTION; | |
| 1638 } | |
| 1639 #endif /* MIGHT_HAVE_PENDING */ | |
| 1640 | |
| 1641 { | |
| 1642 // Exit must be non-blocking, and therefore no exceptions can be thrown. | |
| 1643 EXCEPTION_MARK; | |
| 1644 ObjectSynchronizer::slow_exit(obj, lock, THREAD); | |
| 1645 } | |
| 1646 | |
| 1647 #ifdef MIGHT_HAVE_PENDING | |
| 1648 if (pending_excep != NULL) { | |
| 1649 THREAD->set_pending_exception(pending_excep, pending_file, pending_line); | |
| 1650 } | |
| 1651 #endif /* MIGHT_HAVE_PENDING */ | |
| 1652 JRT_END | |
| 1653 | |
| 1654 #ifndef PRODUCT | |
| 1655 | |
| 1656 void SharedRuntime::print_statistics() { | |
| 1657 ttyLocker ttyl; | |
| 1658 if (xtty != NULL) xtty->head("statistics type='SharedRuntime'"); | |
| 1659 | |
| 1660 if (_monitor_enter_ctr ) tty->print_cr("%5d monitor enter slow", _monitor_enter_ctr); | |
| 1661 if (_monitor_exit_ctr ) tty->print_cr("%5d monitor exit slow", _monitor_exit_ctr); | |
| 1662 if (_throw_null_ctr) tty->print_cr("%5d implicit null throw", _throw_null_ctr); | |
| 1663 | |
| 1664 SharedRuntime::print_ic_miss_histogram(); | |
| 1665 | |
| 1666 if (CountRemovableExceptions) { | |
| 1667 if (_nof_removable_exceptions > 0) { | |
| 1668 Unimplemented(); // this counter is not yet incremented | |
| 1669 tty->print_cr("Removable exceptions: %d", _nof_removable_exceptions); | |
| 1670 } | |
| 1671 } | |
| 1672 | |
| 1673 // Dump the JRT_ENTRY counters | |
| 1674 if( _new_instance_ctr ) tty->print_cr("%5d new instance requires GC", _new_instance_ctr); | |
| 1675 if( _new_array_ctr ) tty->print_cr("%5d new array requires GC", _new_array_ctr); | |
| 1676 if( _multi1_ctr ) tty->print_cr("%5d multianewarray 1 dim", _multi1_ctr); | |
| 1677 if( _multi2_ctr ) tty->print_cr("%5d multianewarray 2 dim", _multi2_ctr); | |
| 1678 if( _multi3_ctr ) tty->print_cr("%5d multianewarray 3 dim", _multi3_ctr); | |
| 1679 if( _multi4_ctr ) tty->print_cr("%5d multianewarray 4 dim", _multi4_ctr); | |
| 1680 if( _multi5_ctr ) tty->print_cr("%5d multianewarray 5 dim", _multi5_ctr); | |
| 1681 | |
| 1682 tty->print_cr("%5d inline cache miss in compiled", _ic_miss_ctr ); | |
| 1683 tty->print_cr("%5d wrong method", _wrong_method_ctr ); | |
| 1684 tty->print_cr("%5d unresolved static call site", _resolve_static_ctr ); | |
| 1685 tty->print_cr("%5d unresolved virtual call site", _resolve_virtual_ctr ); | |
| 1686 tty->print_cr("%5d unresolved opt virtual call site", _resolve_opt_virtual_ctr ); | |
| 1687 | |
| 1688 if( _mon_enter_stub_ctr ) tty->print_cr("%5d monitor enter stub", _mon_enter_stub_ctr ); | |
| 1689 if( _mon_exit_stub_ctr ) tty->print_cr("%5d monitor exit stub", _mon_exit_stub_ctr ); | |
| 1690 if( _mon_enter_ctr ) tty->print_cr("%5d monitor enter slow", _mon_enter_ctr ); | |
| 1691 if( _mon_exit_ctr ) tty->print_cr("%5d monitor exit slow", _mon_exit_ctr ); | |
| 1692 if( _partial_subtype_ctr) tty->print_cr("%5d slow partial subtype", _partial_subtype_ctr ); | |
| 1693 if( _jbyte_array_copy_ctr ) tty->print_cr("%5d byte array copies", _jbyte_array_copy_ctr ); | |
| 1694 if( _jshort_array_copy_ctr ) tty->print_cr("%5d short array copies", _jshort_array_copy_ctr ); | |
| 1695 if( _jint_array_copy_ctr ) tty->print_cr("%5d int array copies", _jint_array_copy_ctr ); | |
| 1696 if( _jlong_array_copy_ctr ) tty->print_cr("%5d long array copies", _jlong_array_copy_ctr ); | |
| 1697 if( _oop_array_copy_ctr ) tty->print_cr("%5d oop array copies", _oop_array_copy_ctr ); | |
| 1698 if( _checkcast_array_copy_ctr ) tty->print_cr("%5d checkcast array copies", _checkcast_array_copy_ctr ); | |
| 1699 if( _unsafe_array_copy_ctr ) tty->print_cr("%5d unsafe array copies", _unsafe_array_copy_ctr ); | |
| 1700 if( _generic_array_copy_ctr ) tty->print_cr("%5d generic array copies", _generic_array_copy_ctr ); | |
| 1701 if( _slow_array_copy_ctr ) tty->print_cr("%5d slow array copies", _slow_array_copy_ctr ); | |
| 1702 if( _find_handler_ctr ) tty->print_cr("%5d find exception handler", _find_handler_ctr ); | |
| 1703 if( _rethrow_ctr ) tty->print_cr("%5d rethrow handler", _rethrow_ctr ); | |
| 1704 | |
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1705 AdapterHandlerLibrary::print_statistics(); |
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1706 |
| 0 | 1707 if (xtty != NULL) xtty->tail("statistics"); |
| 1708 } | |
| 1709 | |
| 1710 inline double percent(int x, int y) { | |
| 1711 return 100.0 * x / MAX2(y, 1); | |
| 1712 } | |
| 1713 | |
| 1714 class MethodArityHistogram { | |
| 1715 public: | |
| 1716 enum { MAX_ARITY = 256 }; | |
| 1717 private: | |
| 1718 static int _arity_histogram[MAX_ARITY]; // histogram of #args | |
| 1719 static int _size_histogram[MAX_ARITY]; // histogram of arg size in words | |
| 1720 static int _max_arity; // max. arity seen | |
| 1721 static int _max_size; // max. arg size seen | |
| 1722 | |
| 1723 static void add_method_to_histogram(nmethod* nm) { | |
| 1724 methodOop m = nm->method(); | |
| 1725 ArgumentCount args(m->signature()); | |
| 1726 int arity = args.size() + (m->is_static() ? 0 : 1); | |
| 1727 int argsize = m->size_of_parameters(); | |
| 1728 arity = MIN2(arity, MAX_ARITY-1); | |
| 1729 argsize = MIN2(argsize, MAX_ARITY-1); | |
| 1730 int count = nm->method()->compiled_invocation_count(); | |
| 1731 _arity_histogram[arity] += count; | |
| 1732 _size_histogram[argsize] += count; | |
| 1733 _max_arity = MAX2(_max_arity, arity); | |
| 1734 _max_size = MAX2(_max_size, argsize); | |
| 1735 } | |
| 1736 | |
| 1737 void print_histogram_helper(int n, int* histo, const char* name) { | |
| 1738 const int N = MIN2(5, n); | |
| 1739 tty->print_cr("\nHistogram of call arity (incl. rcvr, calls to compiled methods only):"); | |
| 1740 double sum = 0; | |
| 1741 double weighted_sum = 0; | |
| 1742 int i; | |
| 1743 for (i = 0; i <= n; i++) { sum += histo[i]; weighted_sum += i*histo[i]; } | |
| 1744 double rest = sum; | |
| 1745 double percent = sum / 100; | |
| 1746 for (i = 0; i <= N; i++) { | |
| 1747 rest -= histo[i]; | |
| 1748 tty->print_cr("%4d: %7d (%5.1f%%)", i, histo[i], histo[i] / percent); | |
| 1749 } | |
| 1750 tty->print_cr("rest: %7d (%5.1f%%))", (int)rest, rest / percent); | |
| 1751 tty->print_cr("(avg. %s = %3.1f, max = %d)", name, weighted_sum / sum, n); | |
| 1752 } | |
| 1753 | |
| 1754 void print_histogram() { | |
| 1755 tty->print_cr("\nHistogram of call arity (incl. rcvr, calls to compiled methods only):"); | |
| 1756 print_histogram_helper(_max_arity, _arity_histogram, "arity"); | |
| 1757 tty->print_cr("\nSame for parameter size (in words):"); | |
| 1758 print_histogram_helper(_max_size, _size_histogram, "size"); | |
| 1759 tty->cr(); | |
| 1760 } | |
| 1761 | |
| 1762 public: | |
| 1763 MethodArityHistogram() { | |
| 1764 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 1765 _max_arity = _max_size = 0; | |
| 1766 for (int i = 0; i < MAX_ARITY; i++) _arity_histogram[i] = _size_histogram [i] = 0; | |
| 1767 CodeCache::nmethods_do(add_method_to_histogram); | |
| 1768 print_histogram(); | |
| 1769 } | |
| 1770 }; | |
| 1771 | |
| 1772 int MethodArityHistogram::_arity_histogram[MethodArityHistogram::MAX_ARITY]; | |
| 1773 int MethodArityHistogram::_size_histogram[MethodArityHistogram::MAX_ARITY]; | |
| 1774 int MethodArityHistogram::_max_arity; | |
| 1775 int MethodArityHistogram::_max_size; | |
| 1776 | |
| 1777 void SharedRuntime::print_call_statistics(int comp_total) { | |
| 1778 tty->print_cr("Calls from compiled code:"); | |
| 1779 int total = _nof_normal_calls + _nof_interface_calls + _nof_static_calls; | |
| 1780 int mono_c = _nof_normal_calls - _nof_optimized_calls - _nof_megamorphic_calls; | |
| 1781 int mono_i = _nof_interface_calls - _nof_optimized_interface_calls - _nof_megamorphic_interface_calls; | |
| 1782 tty->print_cr("\t%9d (%4.1f%%) total non-inlined ", total, percent(total, total)); | |
| 1783 tty->print_cr("\t%9d (%4.1f%%) virtual calls ", _nof_normal_calls, percent(_nof_normal_calls, total)); | |
| 1784 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_calls, percent(_nof_inlined_calls, _nof_normal_calls)); | |
| 1785 tty->print_cr("\t %9d (%3.0f%%) optimized ", _nof_optimized_calls, percent(_nof_optimized_calls, _nof_normal_calls)); | |
| 1786 tty->print_cr("\t %9d (%3.0f%%) monomorphic ", mono_c, percent(mono_c, _nof_normal_calls)); | |
| 1787 tty->print_cr("\t %9d (%3.0f%%) megamorphic ", _nof_megamorphic_calls, percent(_nof_megamorphic_calls, _nof_normal_calls)); | |
| 1788 tty->print_cr("\t%9d (%4.1f%%) interface calls ", _nof_interface_calls, percent(_nof_interface_calls, total)); | |
| 1789 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_interface_calls, percent(_nof_inlined_interface_calls, _nof_interface_calls)); | |
| 1790 tty->print_cr("\t %9d (%3.0f%%) optimized ", _nof_optimized_interface_calls, percent(_nof_optimized_interface_calls, _nof_interface_calls)); | |
| 1791 tty->print_cr("\t %9d (%3.0f%%) monomorphic ", mono_i, percent(mono_i, _nof_interface_calls)); | |
| 1792 tty->print_cr("\t %9d (%3.0f%%) megamorphic ", _nof_megamorphic_interface_calls, percent(_nof_megamorphic_interface_calls, _nof_interface_calls)); | |
| 1793 tty->print_cr("\t%9d (%4.1f%%) static/special calls", _nof_static_calls, percent(_nof_static_calls, total)); | |
| 1794 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_static_calls, percent(_nof_inlined_static_calls, _nof_static_calls)); | |
| 1795 tty->cr(); | |
| 1796 tty->print_cr("Note 1: counter updates are not MT-safe."); | |
| 1797 tty->print_cr("Note 2: %% in major categories are relative to total non-inlined calls;"); | |
| 1798 tty->print_cr(" %% in nested categories are relative to their category"); | |
| 1799 tty->print_cr(" (and thus add up to more than 100%% with inlining)"); | |
| 1800 tty->cr(); | |
| 1801 | |
| 1802 MethodArityHistogram h; | |
| 1803 } | |
| 1804 #endif | |
| 1805 | |
| 1806 | |
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1807 // A simple wrapper class around the calling convention information |
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1808 // that allows sharing of adapters for the same calling convention. |
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1809 class AdapterFingerPrint : public CHeapObj { |
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1810 private: |
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1811 union { |
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1812 int _compact[3]; |
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1813 int* _fingerprint; |
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1814 } _value; |
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1815 int _length; // A negative length indicates the fingerprint is in the compact form, |
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1816 // Otherwise _value._fingerprint is the array. |
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1817 |
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1818 // Remap BasicTypes that are handled equivalently by the adapters. |
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1819 // These are correct for the current system but someday it might be |
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1820 // necessary to make this mapping platform dependent. |
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1821 static BasicType adapter_encoding(BasicType in) { |
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1822 assert((~0xf & in) == 0, "must fit in 4 bits"); |
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1823 switch(in) { |
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1824 case T_BOOLEAN: |
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1825 case T_BYTE: |
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1826 case T_SHORT: |
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1827 case T_CHAR: |
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1828 // There are all promoted to T_INT in the calling convention |
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1829 return T_INT; |
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1830 |
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1831 case T_OBJECT: |
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1832 case T_ARRAY: |
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1833 if (!TaggedStackInterpreter) { |
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1834 #ifdef _LP64 |
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1835 return T_LONG; |
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1836 #else |
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1837 return T_INT; |
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1838 #endif |
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1839 } |
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1840 return T_OBJECT; |
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1841 |
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1842 case T_INT: |
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1843 case T_LONG: |
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1844 case T_FLOAT: |
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1845 case T_DOUBLE: |
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1846 case T_VOID: |
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1847 return in; |
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1848 |
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1849 default: |
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1850 ShouldNotReachHere(); |
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1851 return T_CONFLICT; |
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1852 } |
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1853 } |
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1854 |
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1855 public: |
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1856 AdapterFingerPrint(int total_args_passed, BasicType* sig_bt) { |
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1857 // The fingerprint is based on the BasicType signature encoded |
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1858 // into an array of ints with four entries per int. |
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1859 int* ptr; |
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1860 int len = (total_args_passed + 3) >> 2; |
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1861 if (len <= (int)(sizeof(_value._compact) / sizeof(int))) { |
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1862 _value._compact[0] = _value._compact[1] = _value._compact[2] = 0; |
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1863 // Storing the signature encoded as signed chars hits about 98% |
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1864 // of the time. |
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|
1865 _length = -len; |
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|
1866 ptr = _value._compact; |
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|
1867 } else { |
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|
1868 _length = len; |
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1869 _value._fingerprint = NEW_C_HEAP_ARRAY(int, _length); |
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1870 ptr = _value._fingerprint; |
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1871 } |
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1872 |
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1873 // Now pack the BasicTypes with 4 per int |
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1874 int sig_index = 0; |
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1875 for (int index = 0; index < len; index++) { |
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1876 int value = 0; |
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1877 for (int byte = 0; byte < 4; byte++) { |
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1878 if (sig_index < total_args_passed) { |
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1879 value = (value << 4) | adapter_encoding(sig_bt[sig_index++]); |
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1880 } |
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1881 } |
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1882 ptr[index] = value; |
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1883 } |
|
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1884 } |
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1885 |
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1886 ~AdapterFingerPrint() { |
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1887 if (_length > 0) { |
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1888 FREE_C_HEAP_ARRAY(int, _value._fingerprint); |
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1889 } |
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1890 } |
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1891 |
|
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1892 int value(int index) { |
|
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1893 if (_length < 0) { |
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1894 return _value._compact[index]; |
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1895 } |
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1896 return _value._fingerprint[index]; |
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1897 } |
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1898 int length() { |
|
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1899 if (_length < 0) return -_length; |
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1900 return _length; |
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1901 } |
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1902 |
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|
1903 bool is_compact() { |
|
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1904 return _length <= 0; |
|
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|
1905 } |
|
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1906 |
|
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1907 unsigned int compute_hash() { |
|
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1908 int hash = 0; |
|
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1909 for (int i = 0; i < length(); i++) { |
|
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1910 int v = value(i); |
|
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1911 hash = (hash << 8) ^ v ^ (hash >> 5); |
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1912 } |
|
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1913 return (unsigned int)hash; |
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1914 } |
|
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1915 |
|
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|
1916 const char* as_string() { |
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|
1917 stringStream st; |
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1918 for (int i = 0; i < length(); i++) { |
|
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1919 st.print(PTR_FORMAT, value(i)); |
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1920 } |
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1921 return st.as_string(); |
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1922 } |
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1923 |
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1924 bool equals(AdapterFingerPrint* other) { |
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1925 if (other->_length != _length) { |
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1926 return false; |
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1927 } |
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1928 if (_length < 0) { |
|
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1929 return _value._compact[0] == other->_value._compact[0] && |
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1930 _value._compact[1] == other->_value._compact[1] && |
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1931 _value._compact[2] == other->_value._compact[2]; |
|
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1932 } else { |
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1933 for (int i = 0; i < _length; i++) { |
|
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1934 if (_value._fingerprint[i] != other->_value._fingerprint[i]) { |
|
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1935 return false; |
|
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1936 } |
|
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1937 } |
|
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1938 } |
|
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1939 return true; |
|
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1940 } |
|
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1941 }; |
|
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1942 |
|
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1943 |
|
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1944 // A hashtable mapping from AdapterFingerPrints to AdapterHandlerEntries |
|
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1945 class AdapterHandlerTable : public BasicHashtable { |
|
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1946 friend class AdapterHandlerTableIterator; |
|
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1947 |
|
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1948 private: |
|
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1949 |
|
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1950 #ifdef ASSERT |
|
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1951 static int _lookups; // number of calls to lookup |
|
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1952 static int _buckets; // number of buckets checked |
|
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1953 static int _equals; // number of buckets checked with matching hash |
|
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1954 static int _hits; // number of successful lookups |
|
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1955 static int _compact; // number of equals calls with compact signature |
|
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1956 #endif |
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1957 |
|
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1958 AdapterHandlerEntry* bucket(int i) { |
|
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1959 return (AdapterHandlerEntry*)BasicHashtable::bucket(i); |
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1960 } |
|
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1961 |
|
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1962 public: |
|
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1963 AdapterHandlerTable() |
|
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1964 : BasicHashtable(293, sizeof(AdapterHandlerEntry)) { } |
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1965 |
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1966 // Create a new entry suitable for insertion in the table |
|
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1967 AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) { |
|
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1968 AdapterHandlerEntry* entry = (AdapterHandlerEntry*)BasicHashtable::new_entry(fingerprint->compute_hash()); |
|
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1969 entry->init(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
|
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1970 return entry; |
|
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1971 } |
|
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|
1972 |
|
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1973 // Insert an entry into the table |
|
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1974 void add(AdapterHandlerEntry* entry) { |
|
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1975 int index = hash_to_index(entry->hash()); |
|
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1976 add_entry(index, entry); |
|
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|
1977 } |
|
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|
1978 |
|
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1979 void free_entry(AdapterHandlerEntry* entry) { |
|
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1980 entry->deallocate(); |
|
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1981 BasicHashtable::free_entry(entry); |
|
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|
1982 } |
|
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|
1983 |
|
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1984 // Find a entry with the same fingerprint if it exists |
|
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1985 AdapterHandlerEntry* lookup(int total_args_passed, BasicType* sig_bt) { |
|
1187
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1986 debug_only(_lookups++); |
|
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1987 AdapterFingerPrint fp(total_args_passed, sig_bt); |
|
1187
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1988 unsigned int hash = fp.compute_hash(); |
|
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1989 int index = hash_to_index(hash); |
|
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1990 for (AdapterHandlerEntry* e = bucket(index); e != NULL; e = e->next()) { |
|
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1991 debug_only(_buckets++); |
|
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1992 if (e->hash() == hash) { |
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1993 debug_only(_equals++); |
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1994 if (fp.equals(e->fingerprint())) { |
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1995 #ifdef ASSERT |
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1996 if (fp.is_compact()) _compact++; |
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1997 _hits++; |
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1998 #endif |
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1999 return e; |
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2000 } |
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2001 } |
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2002 } |
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2003 return NULL; |
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2004 } |
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2005 |
|
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2006 void print_statistics() { |
|
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2007 ResourceMark rm; |
|
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2008 int longest = 0; |
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2009 int empty = 0; |
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2010 int total = 0; |
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|
2011 int nonempty = 0; |
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2012 for (int index = 0; index < table_size(); index++) { |
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2013 int count = 0; |
|
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2014 for (AdapterHandlerEntry* e = bucket(index); e != NULL; e = e->next()) { |
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2015 count++; |
|
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|
2016 } |
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2017 if (count != 0) nonempty++; |
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2018 if (count == 0) empty++; |
|
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2019 if (count > longest) longest = count; |
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2020 total += count; |
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2021 } |
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2022 tty->print_cr("AdapterHandlerTable: empty %d longest %d total %d average %f", |
|
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2023 empty, longest, total, total / (double)nonempty); |
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2024 #ifdef ASSERT |
|
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2025 tty->print_cr("AdapterHandlerTable: lookups %d buckets %d equals %d hits %d compact %d", |
|
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2026 _lookups, _buckets, _equals, _hits, _compact); |
|
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2027 #endif |
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|
2028 } |
|
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|
2029 }; |
|
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|
2030 |
|
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|
2031 |
|
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|
2032 #ifdef ASSERT |
|
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|
2033 |
|
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|
2034 int AdapterHandlerTable::_lookups; |
|
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2035 int AdapterHandlerTable::_buckets; |
|
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2036 int AdapterHandlerTable::_equals; |
|
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2037 int AdapterHandlerTable::_hits; |
|
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|
2038 int AdapterHandlerTable::_compact; |
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2039 |
|
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2040 class AdapterHandlerTableIterator : public StackObj { |
|
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2041 private: |
|
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|
2042 AdapterHandlerTable* _table; |
|
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|
2043 int _index; |
|
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2044 AdapterHandlerEntry* _current; |
|
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|
2045 |
|
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|
2046 void scan() { |
|
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2047 while (_index < _table->table_size()) { |
|
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2048 AdapterHandlerEntry* a = _table->bucket(_index); |
|
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2049 if (a != NULL) { |
|
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|
2050 _current = a; |
|
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|
2051 return; |
|
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|
2052 } |
|
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|
2053 _index++; |
|
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|
2054 } |
|
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|
2055 } |
|
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|
2056 |
|
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|
2057 public: |
|
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2058 AdapterHandlerTableIterator(AdapterHandlerTable* table): _table(table), _index(0), _current(NULL) { |
|
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|
2059 scan(); |
|
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|
2060 } |
|
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|
2061 bool has_next() { |
|
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|
2062 return _current != NULL; |
|
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|
2063 } |
|
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|
2064 AdapterHandlerEntry* next() { |
|
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|
2065 if (_current != NULL) { |
|
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|
2066 AdapterHandlerEntry* result = _current; |
|
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|
2067 _current = _current->next(); |
|
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|
2068 if (_current == NULL) scan(); |
|
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|
2069 return result; |
|
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|
2070 } else { |
|
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|
2071 return NULL; |
|
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|
2072 } |
|
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|
2073 } |
|
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|
2074 }; |
|
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|
2075 #endif |
|
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|
2076 |
|
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|
2077 |
| 0 | 2078 // --------------------------------------------------------------------------- |
| 2079 // Implementation of AdapterHandlerLibrary | |
| 2080 const char* AdapterHandlerEntry::name = "I2C/C2I adapters"; | |
|
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2081 AdapterHandlerTable* AdapterHandlerLibrary::_adapters = NULL; |
|
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2082 AdapterHandlerEntry* AdapterHandlerLibrary::_abstract_method_handler = NULL; |
| 0 | 2083 const int AdapterHandlerLibrary_size = 16*K; |
|
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2084 BufferBlob* AdapterHandlerLibrary::_buffer = NULL; |
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2085 |
|
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2086 BufferBlob* AdapterHandlerLibrary::buffer_blob() { |
|
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2087 // Should be called only when AdapterHandlerLibrary_lock is active. |
|
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2088 if (_buffer == NULL) // Initialize lazily |
|
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2089 _buffer = BufferBlob::create("adapters", AdapterHandlerLibrary_size); |
|
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2090 return _buffer; |
|
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|
2091 } |
| 0 | 2092 |
| 2093 void AdapterHandlerLibrary::initialize() { | |
|
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2094 if (_adapters != NULL) return; |
|
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2095 _adapters = new AdapterHandlerTable(); |
| 0 | 2096 |
| 2097 // Create a special handler for abstract methods. Abstract methods | |
| 2098 // are never compiled so an i2c entry is somewhat meaningless, but | |
| 2099 // fill it in with something appropriate just in case. Pass handle | |
| 2100 // wrong method for the c2i transitions. | |
| 2101 address wrong_method = SharedRuntime::get_handle_wrong_method_stub(); | |
|
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2102 _abstract_method_handler = AdapterHandlerLibrary::new_entry(new AdapterFingerPrint(0, NULL), |
|
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|
2103 StubRoutines::throw_AbstractMethodError_entry(), |
|
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|
2104 wrong_method, wrong_method); |
| 0 | 2105 } |
| 2106 | |
|
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2107 AdapterHandlerEntry* AdapterHandlerLibrary::new_entry(AdapterFingerPrint* fingerprint, |
|
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|
2108 address i2c_entry, |
|
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|
2109 address c2i_entry, |
|
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|
2110 address c2i_unverified_entry) { |
|
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|
2111 return _adapters->new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
|
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|
2112 } |
|
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|
2113 |
|
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|
2114 AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(methodHandle method) { |
|
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|
2115 // Use customized signature handler. Need to lock around updates to |
|
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2116 // the AdapterHandlerTable (it is not safe for concurrent readers |
|
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2117 // and a single writer: this could be fixed if it becomes a |
|
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|
2118 // problem). |
| 0 | 2119 |
| 2120 // Get the address of the ic_miss handlers before we grab the | |
| 2121 // AdapterHandlerLibrary_lock. This fixes bug 6236259 which | |
| 2122 // was caused by the initialization of the stubs happening | |
| 2123 // while we held the lock and then notifying jvmti while | |
| 2124 // holding it. This just forces the initialization to be a little | |
| 2125 // earlier. | |
| 2126 address ic_miss = SharedRuntime::get_ic_miss_stub(); | |
| 2127 assert(ic_miss != NULL, "must have handler"); | |
| 2128 | |
|
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|
2129 ResourceMark rm; |
|
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|
2130 |
|
742
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2131 NOT_PRODUCT(int code_size); |
| 0 | 2132 BufferBlob *B = NULL; |
|
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2133 AdapterHandlerEntry* entry = NULL; |
|
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|
2134 AdapterFingerPrint* fingerprint = NULL; |
| 0 | 2135 { |
| 2136 MutexLocker mu(AdapterHandlerLibrary_lock); | |
| 2137 // make sure data structure is initialized | |
| 2138 initialize(); | |
| 2139 | |
| 2140 if (method->is_abstract()) { | |
|
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|
2141 return _abstract_method_handler; |
| 0 | 2142 } |
| 2143 | |
|
1187
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|
2144 // Fill in the signature array, for the calling-convention call. |
|
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2145 int total_args_passed = method->size_of_parameters(); // All args on stack |
|
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|
2146 |
|
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|
2147 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed); |
|
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|
2148 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed); |
|
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|
2149 int i = 0; |
|
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|
2150 if (!method->is_static()) // Pass in receiver first |
|
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|
2151 sig_bt[i++] = T_OBJECT; |
|
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|
2152 for (SignatureStream ss(method->signature()); !ss.at_return_type(); ss.next()) { |
|
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|
2153 sig_bt[i++] = ss.type(); // Collect remaining bits of signature |
|
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|
2154 if (ss.type() == T_LONG || ss.type() == T_DOUBLE) |
|
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|
2155 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
|
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|
2156 } |
|
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|
2157 assert(i == total_args_passed, ""); |
|
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|
2158 |
|
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|
2159 // Lookup method signature's fingerprint |
|
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|
2160 entry = _adapters->lookup(total_args_passed, sig_bt); |
|
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|
2161 |
|
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|
2162 #ifdef ASSERT |
|
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|
2163 AdapterHandlerEntry* shared_entry = NULL; |
|
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|
2164 if (VerifyAdapterSharing && entry != NULL) { |
|
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|
2165 shared_entry = entry; |
|
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|
2166 entry = NULL; |
|
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|
2167 } |
|
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|
2168 #endif |
|
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|
2169 |
|
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|
2170 if (entry != NULL) { |
|
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|
2171 return entry; |
| 0 | 2172 } |
| 2173 | |
|
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|
2174 // Get a description of the compiled java calling convention and the largest used (VMReg) stack slot usage |
|
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2175 int comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed, false); |
|
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|
2176 |
|
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|
2177 // Make a C heap allocated version of the fingerprint to store in the adapter |
|
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|
2178 fingerprint = new AdapterFingerPrint(total_args_passed, sig_bt); |
|
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|
2179 |
| 0 | 2180 // Create I2C & C2I handlers |
| 2181 | |
|
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2182 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
|
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|
2183 if (buf != NULL) { |
|
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|
2184 CodeBuffer buffer(buf->instructions_begin(), buf->instructions_size()); |
|
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|
2185 short buffer_locs[20]; |
|
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|
2186 buffer.insts()->initialize_shared_locs((relocInfo*)buffer_locs, |
|
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2187 sizeof(buffer_locs)/sizeof(relocInfo)); |
|
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|
2188 MacroAssembler _masm(&buffer); |
|
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|
2189 |
|
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2190 entry = SharedRuntime::generate_i2c2i_adapters(&_masm, |
|
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|
2191 total_args_passed, |
|
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|
2192 comp_args_on_stack, |
|
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|
2193 sig_bt, |
|
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|
2194 regs, |
|
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|
2195 fingerprint); |
| 0 | 2196 |
|
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|
2197 #ifdef ASSERT |
|
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|
2198 if (VerifyAdapterSharing) { |
|
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|
2199 if (shared_entry != NULL) { |
|
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|
2200 assert(shared_entry->compare_code(buf->instructions_begin(), buffer.code_size(), total_args_passed, sig_bt), |
|
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|
2201 "code must match"); |
|
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|
2202 // Release the one just created and return the original |
|
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|
2203 _adapters->free_entry(entry); |
|
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|
2204 return shared_entry; |
|
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|
2205 } else { |
|
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|
2206 entry->save_code(buf->instructions_begin(), buffer.code_size(), total_args_passed, sig_bt); |
|
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|
2207 } |
|
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|
2208 } |
|
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|
2209 #endif |
|
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|
2210 |
|
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|
2211 B = BufferBlob::create(AdapterHandlerEntry::name, &buffer); |
|
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|
2212 NOT_PRODUCT(code_size = buffer.code_size()); |
|
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|
2213 } |
| 28 | 2214 if (B == NULL) { |
| 2215 // CodeCache is full, disable compilation | |
| 2216 // Ought to log this but compile log is only per compile thread | |
| 2217 // and we're some non descript Java thread. | |
| 1202 | 2218 MutexUnlocker mu(AdapterHandlerLibrary_lock); |
| 2219 CompileBroker::handle_full_code_cache(); | |
|
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|
2220 return NULL; // Out of CodeCache space |
| 28 | 2221 } |
| 0 | 2222 entry->relocate(B->instructions_begin()); |
| 2223 #ifndef PRODUCT | |
| 2224 // debugging suppport | |
| 2225 if (PrintAdapterHandlers) { | |
| 2226 tty->cr(); | |
|
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|
2227 tty->print_cr("i2c argument handler #%d for: %s %s (fingerprint = %s, %d bytes generated)", |
|
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|
2228 _adapters->number_of_entries(), (method->is_static() ? "static" : "receiver"), |
|
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|
2229 method->signature()->as_C_string(), fingerprint->as_string(), code_size ); |
| 0 | 2230 tty->print_cr("c2i argument handler starts at %p",entry->get_c2i_entry()); |
|
742
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|
2231 Disassembler::decode(entry->get_i2c_entry(), entry->get_i2c_entry() + code_size); |
| 0 | 2232 } |
| 2233 #endif | |
| 2234 | |
|
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|
2235 _adapters->add(entry); |
| 0 | 2236 } |
| 2237 // Outside of the lock | |
| 2238 if (B != NULL) { | |
| 2239 char blob_id[256]; | |
| 2240 jio_snprintf(blob_id, | |
| 2241 sizeof(blob_id), | |
|
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|
2242 "%s(%s)@" PTR_FORMAT, |
| 0 | 2243 AdapterHandlerEntry::name, |
|
1187
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|
2244 fingerprint->as_string(), |
| 0 | 2245 B->instructions_begin()); |
| 2246 VTune::register_stub(blob_id, B->instructions_begin(), B->instructions_end()); | |
| 2247 Forte::register_stub(blob_id, B->instructions_begin(), B->instructions_end()); | |
| 2248 | |
| 2249 if (JvmtiExport::should_post_dynamic_code_generated()) { | |
| 2250 JvmtiExport::post_dynamic_code_generated(blob_id, | |
| 2251 B->instructions_begin(), | |
| 2252 B->instructions_end()); | |
| 2253 } | |
| 2254 } | |
|
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|
2255 return entry; |
| 0 | 2256 } |
| 2257 | |
| 2258 void AdapterHandlerEntry::relocate(address new_base) { | |
| 2259 ptrdiff_t delta = new_base - _i2c_entry; | |
| 2260 _i2c_entry += delta; | |
| 2261 _c2i_entry += delta; | |
| 2262 _c2i_unverified_entry += delta; | |
| 2263 } | |
| 2264 | |
|
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|
2265 |
|
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|
2266 void AdapterHandlerEntry::deallocate() { |
|
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|
2267 delete _fingerprint; |
|
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|
2268 #ifdef ASSERT |
|
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|
2269 if (_saved_code) FREE_C_HEAP_ARRAY(unsigned char, _saved_code); |
|
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|
2270 if (_saved_sig) FREE_C_HEAP_ARRAY(Basictype, _saved_sig); |
|
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|
2271 #endif |
|
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|
2272 } |
|
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|
2273 |
|
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|
2274 |
|
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|
2275 #ifdef ASSERT |
|
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|
2276 // Capture the code before relocation so that it can be compared |
|
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|
2277 // against other versions. If the code is captured after relocation |
|
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|
2278 // then relative instructions won't be equivalent. |
|
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|
2279 void AdapterHandlerEntry::save_code(unsigned char* buffer, int length, int total_args_passed, BasicType* sig_bt) { |
|
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|
2280 _saved_code = NEW_C_HEAP_ARRAY(unsigned char, length); |
|
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|
2281 _code_length = length; |
|
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|
2282 memcpy(_saved_code, buffer, length); |
|
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|
2283 _total_args_passed = total_args_passed; |
|
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|
2284 _saved_sig = NEW_C_HEAP_ARRAY(BasicType, _total_args_passed); |
|
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|
2285 memcpy(_saved_sig, sig_bt, _total_args_passed * sizeof(BasicType)); |
|
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|
2286 } |
|
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|
2287 |
|
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|
2288 |
|
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|
2289 bool AdapterHandlerEntry::compare_code(unsigned char* buffer, int length, int total_args_passed, BasicType* sig_bt) { |
|
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|
2290 if (length != _code_length) { |
|
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|
2291 return false; |
|
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|
2292 } |
|
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|
2293 for (int i = 0; i < length; i++) { |
|
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2294 if (buffer[i] != _saved_code[i]) { |
|
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|
2295 return false; |
|
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|
2296 } |
|
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|
2297 } |
|
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|
2298 return true; |
|
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|
2299 } |
|
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|
2300 #endif |
|
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2301 |
|
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2302 |
| 0 | 2303 // Create a native wrapper for this native method. The wrapper converts the |
| 2304 // java compiled calling convention to the native convention, handlizes | |
| 2305 // arguments, and transitions to native. On return from the native we transition | |
| 2306 // back to java blocking if a safepoint is in progress. | |
| 2307 nmethod *AdapterHandlerLibrary::create_native_wrapper(methodHandle method) { | |
| 2308 ResourceMark rm; | |
| 2309 nmethod* nm = NULL; | |
| 2310 | |
| 2311 if (PrintCompilation) { | |
| 2312 ttyLocker ttyl; | |
| 2313 tty->print("--- n%s ", (method->is_synchronized() ? "s" : " ")); | |
| 2314 method->print_short_name(tty); | |
| 2315 if (method->is_static()) { | |
| 2316 tty->print(" (static)"); | |
| 2317 } | |
| 2318 tty->cr(); | |
| 2319 } | |
| 2320 | |
| 2321 assert(method->has_native_function(), "must have something valid to call!"); | |
| 2322 | |
| 2323 { | |
| 2324 // perform the work while holding the lock, but perform any printing outside the lock | |
| 2325 MutexLocker mu(AdapterHandlerLibrary_lock); | |
| 2326 // See if somebody beat us to it | |
| 2327 nm = method->code(); | |
| 2328 if (nm) { | |
| 2329 return nm; | |
| 2330 } | |
| 2331 | |
|
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2332 ResourceMark rm; |
| 0 | 2333 |
|
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2334 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
|
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2335 if (buf != NULL) { |
|
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2336 CodeBuffer buffer(buf->instructions_begin(), buf->instructions_size()); |
|
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2337 double locs_buf[20]; |
|
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2338 buffer.insts()->initialize_shared_locs((relocInfo*)locs_buf, sizeof(locs_buf) / sizeof(relocInfo)); |
|
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2339 MacroAssembler _masm(&buffer); |
|
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2340 |
|
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2341 // Fill in the signature array, for the calling-convention call. |
|
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2342 int total_args_passed = method->size_of_parameters(); |
| 0 | 2343 |
|
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2344 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType,total_args_passed); |
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2345 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair,total_args_passed); |
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2346 int i=0; |
|
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2347 if( !method->is_static() ) // Pass in receiver first |
|
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2348 sig_bt[i++] = T_OBJECT; |
|
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2349 SignatureStream ss(method->signature()); |
|
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2350 for( ; !ss.at_return_type(); ss.next()) { |
|
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2351 sig_bt[i++] = ss.type(); // Collect remaining bits of signature |
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2352 if( ss.type() == T_LONG || ss.type() == T_DOUBLE ) |
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2353 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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2354 } |
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2355 assert( i==total_args_passed, "" ); |
|
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2356 BasicType ret_type = ss.type(); |
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2357 |
|
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2358 // Now get the compiled-Java layout as input arguments |
|
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2359 int comp_args_on_stack; |
|
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2360 comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed, false); |
|
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2361 |
|
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2362 // Generate the compiled-to-native wrapper code |
|
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2363 nm = SharedRuntime::generate_native_wrapper(&_masm, |
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2364 method, |
|
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|
2365 total_args_passed, |
|
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|
2366 comp_args_on_stack, |
|
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|
2367 sig_bt,regs, |
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|
2368 ret_type); |
| 0 | 2369 } |
| 2370 } | |
| 2371 | |
| 2372 // Must unlock before calling set_code | |
| 2373 // Install the generated code. | |
| 2374 if (nm != NULL) { | |
| 2375 method->set_code(method, nm); | |
| 2376 nm->post_compiled_method_load_event(); | |
| 2377 } else { | |
| 2378 // CodeCache is full, disable compilation | |
| 2379 // Ought to log this but compile log is only per compile thread | |
| 2380 // and we're some non descript Java thread. | |
| 1202 | 2381 MutexUnlocker mu(AdapterHandlerLibrary_lock); |
| 2382 CompileBroker::handle_full_code_cache(); | |
| 0 | 2383 } |
| 2384 return nm; | |
| 2385 } | |
| 2386 | |
|
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2387 #ifdef HAVE_DTRACE_H |
|
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2388 // Create a dtrace nmethod for this method. The wrapper converts the |
|
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2389 // java compiled calling convention to the native convention, makes a dummy call |
|
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2390 // (actually nops for the size of the call instruction, which become a trap if |
|
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2391 // probe is enabled). The returns to the caller. Since this all looks like a |
|
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2392 // leaf no thread transition is needed. |
|
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2393 |
|
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2394 nmethod *AdapterHandlerLibrary::create_dtrace_nmethod(methodHandle method) { |
|
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2395 ResourceMark rm; |
|
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2396 nmethod* nm = NULL; |
|
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2397 |
|
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2398 if (PrintCompilation) { |
|
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2399 ttyLocker ttyl; |
|
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2400 tty->print("--- n%s "); |
|
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2401 method->print_short_name(tty); |
|
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2402 if (method->is_static()) { |
|
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2403 tty->print(" (static)"); |
|
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2404 } |
|
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2405 tty->cr(); |
|
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2406 } |
|
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|
2407 |
|
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|
2408 { |
|
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|
2409 // perform the work while holding the lock, but perform any printing |
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2410 // outside the lock |
|
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2411 MutexLocker mu(AdapterHandlerLibrary_lock); |
|
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2412 // See if somebody beat us to it |
|
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2413 nm = method->code(); |
|
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2414 if (nm) { |
|
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2415 return nm; |
|
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|
2416 } |
|
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|
2417 |
|
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|
2418 ResourceMark rm; |
|
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|
2419 |
|
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|
2420 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
|
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|
2421 if (buf != NULL) { |
|
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|
2422 CodeBuffer buffer(buf->instructions_begin(), buf->instructions_size()); |
|
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|
2423 // Need a few relocation entries |
|
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|
2424 double locs_buf[20]; |
|
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|
2425 buffer.insts()->initialize_shared_locs( |
|
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2426 (relocInfo*)locs_buf, sizeof(locs_buf) / sizeof(relocInfo)); |
|
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2427 MacroAssembler _masm(&buffer); |
|
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2428 |
|
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|
2429 // Generate the compiled-to-native wrapper code |
|
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|
2430 nm = SharedRuntime::generate_dtrace_nmethod(&_masm, method); |
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|
2431 } |
|
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2432 } |
|
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|
2433 return nm; |
|
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|
2434 } |
|
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|
2435 |
|
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|
2436 // the dtrace method needs to convert java lang string to utf8 string. |
|
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2437 void SharedRuntime::get_utf(oopDesc* src, address dst) { |
|
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2438 typeArrayOop jlsValue = java_lang_String::value(src); |
|
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2439 int jlsOffset = java_lang_String::offset(src); |
|
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2440 int jlsLen = java_lang_String::length(src); |
|
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2441 jchar* jlsPos = (jlsLen == 0) ? NULL : |
|
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2442 jlsValue->char_at_addr(jlsOffset); |
|
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2443 (void) UNICODE::as_utf8(jlsPos, jlsLen, (char *)dst, max_dtrace_string_size); |
|
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2444 } |
|
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|
2445 #endif // ndef HAVE_DTRACE_H |
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2446 |
| 0 | 2447 // ------------------------------------------------------------------------- |
| 2448 // Java-Java calling convention | |
| 2449 // (what you use when Java calls Java) | |
| 2450 | |
| 2451 //------------------------------name_for_receiver---------------------------------- | |
| 2452 // For a given signature, return the VMReg for parameter 0. | |
| 2453 VMReg SharedRuntime::name_for_receiver() { | |
| 2454 VMRegPair regs; | |
| 2455 BasicType sig_bt = T_OBJECT; | |
| 2456 (void) java_calling_convention(&sig_bt, ®s, 1, true); | |
| 2457 // Return argument 0 register. In the LP64 build pointers | |
| 2458 // take 2 registers, but the VM wants only the 'main' name. | |
| 2459 return regs.first(); | |
| 2460 } | |
| 2461 | |
|
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2462 VMRegPair *SharedRuntime::find_callee_arguments(symbolOop sig, bool has_receiver, int* arg_size) { |
| 0 | 2463 // This method is returning a data structure allocating as a |
| 2464 // ResourceObject, so do not put any ResourceMarks in here. | |
| 2465 char *s = sig->as_C_string(); | |
| 2466 int len = (int)strlen(s); | |
| 2467 *s++; len--; // Skip opening paren | |
| 2468 char *t = s+len; | |
| 2469 while( *(--t) != ')' ) ; // Find close paren | |
| 2470 | |
| 2471 BasicType *sig_bt = NEW_RESOURCE_ARRAY( BasicType, 256 ); | |
| 2472 VMRegPair *regs = NEW_RESOURCE_ARRAY( VMRegPair, 256 ); | |
| 2473 int cnt = 0; | |
|
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2474 if (has_receiver) { |
| 0 | 2475 sig_bt[cnt++] = T_OBJECT; // Receiver is argument 0; not in signature |
| 2476 } | |
| 2477 | |
| 2478 while( s < t ) { | |
| 2479 switch( *s++ ) { // Switch on signature character | |
| 2480 case 'B': sig_bt[cnt++] = T_BYTE; break; | |
| 2481 case 'C': sig_bt[cnt++] = T_CHAR; break; | |
| 2482 case 'D': sig_bt[cnt++] = T_DOUBLE; sig_bt[cnt++] = T_VOID; break; | |
| 2483 case 'F': sig_bt[cnt++] = T_FLOAT; break; | |
| 2484 case 'I': sig_bt[cnt++] = T_INT; break; | |
| 2485 case 'J': sig_bt[cnt++] = T_LONG; sig_bt[cnt++] = T_VOID; break; | |
| 2486 case 'S': sig_bt[cnt++] = T_SHORT; break; | |
| 2487 case 'Z': sig_bt[cnt++] = T_BOOLEAN; break; | |
| 2488 case 'V': sig_bt[cnt++] = T_VOID; break; | |
| 2489 case 'L': // Oop | |
| 2490 while( *s++ != ';' ) ; // Skip signature | |
| 2491 sig_bt[cnt++] = T_OBJECT; | |
| 2492 break; | |
| 2493 case '[': { // Array | |
| 2494 do { // Skip optional size | |
| 2495 while( *s >= '0' && *s <= '9' ) s++; | |
| 2496 } while( *s++ == '[' ); // Nested arrays? | |
| 2497 // Skip element type | |
| 2498 if( s[-1] == 'L' ) | |
| 2499 while( *s++ != ';' ) ; // Skip signature | |
| 2500 sig_bt[cnt++] = T_ARRAY; | |
| 2501 break; | |
| 2502 } | |
| 2503 default : ShouldNotReachHere(); | |
| 2504 } | |
| 2505 } | |
| 2506 assert( cnt < 256, "grow table size" ); | |
| 2507 | |
| 2508 int comp_args_on_stack; | |
| 2509 comp_args_on_stack = java_calling_convention(sig_bt, regs, cnt, true); | |
| 2510 | |
| 2511 // the calling convention doesn't count out_preserve_stack_slots so | |
| 2512 // we must add that in to get "true" stack offsets. | |
| 2513 | |
| 2514 if (comp_args_on_stack) { | |
| 2515 for (int i = 0; i < cnt; i++) { | |
| 2516 VMReg reg1 = regs[i].first(); | |
| 2517 if( reg1->is_stack()) { | |
| 2518 // Yuck | |
| 2519 reg1 = reg1->bias(out_preserve_stack_slots()); | |
| 2520 } | |
| 2521 VMReg reg2 = regs[i].second(); | |
| 2522 if( reg2->is_stack()) { | |
| 2523 // Yuck | |
| 2524 reg2 = reg2->bias(out_preserve_stack_slots()); | |
| 2525 } | |
| 2526 regs[i].set_pair(reg2, reg1); | |
| 2527 } | |
| 2528 } | |
| 2529 | |
| 2530 // results | |
| 2531 *arg_size = cnt; | |
| 2532 return regs; | |
| 2533 } | |
| 2534 | |
| 2535 // OSR Migration Code | |
| 2536 // | |
| 2537 // This code is used convert interpreter frames into compiled frames. It is | |
| 2538 // called from very start of a compiled OSR nmethod. A temp array is | |
| 2539 // allocated to hold the interesting bits of the interpreter frame. All | |
| 2540 // active locks are inflated to allow them to move. The displaced headers and | |
| 2541 // active interpeter locals are copied into the temp buffer. Then we return | |
| 2542 // back to the compiled code. The compiled code then pops the current | |
| 2543 // interpreter frame off the stack and pushes a new compiled frame. Then it | |
| 2544 // copies the interpreter locals and displaced headers where it wants. | |
| 2545 // Finally it calls back to free the temp buffer. | |
| 2546 // | |
| 2547 // All of this is done NOT at any Safepoint, nor is any safepoint or GC allowed. | |
| 2548 | |
| 2549 JRT_LEAF(intptr_t*, SharedRuntime::OSR_migration_begin( JavaThread *thread) ) | |
| 2550 | |
| 2551 #ifdef IA64 | |
| 2552 ShouldNotReachHere(); // NYI | |
| 2553 #endif /* IA64 */ | |
| 2554 | |
| 2555 // | |
| 2556 // This code is dependent on the memory layout of the interpreter local | |
| 2557 // array and the monitors. On all of our platforms the layout is identical | |
| 2558 // so this code is shared. If some platform lays the their arrays out | |
| 2559 // differently then this code could move to platform specific code or | |
| 2560 // the code here could be modified to copy items one at a time using | |
| 2561 // frame accessor methods and be platform independent. | |
| 2562 | |
| 2563 frame fr = thread->last_frame(); | |
| 2564 assert( fr.is_interpreted_frame(), "" ); | |
| 2565 assert( fr.interpreter_frame_expression_stack_size()==0, "only handle empty stacks" ); | |
| 2566 | |
| 2567 // Figure out how many monitors are active. | |
| 2568 int active_monitor_count = 0; | |
| 2569 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); | |
| 2570 kptr < fr.interpreter_frame_monitor_begin(); | |
| 2571 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { | |
| 2572 if( kptr->obj() != NULL ) active_monitor_count++; | |
| 2573 } | |
| 2574 | |
| 2575 // QQQ we could place number of active monitors in the array so that compiled code | |
| 2576 // could double check it. | |
| 2577 | |
| 2578 methodOop moop = fr.interpreter_frame_method(); | |
| 2579 int max_locals = moop->max_locals(); | |
| 2580 // Allocate temp buffer, 1 word per local & 2 per active monitor | |
| 2581 int buf_size_words = max_locals + active_monitor_count*2; | |
| 2582 intptr_t *buf = NEW_C_HEAP_ARRAY(intptr_t,buf_size_words); | |
| 2583 | |
| 2584 // Copy the locals. Order is preserved so that loading of longs works. | |
| 2585 // Since there's no GC I can copy the oops blindly. | |
| 2586 assert( sizeof(HeapWord)==sizeof(intptr_t), "fix this code"); | |
| 2587 if (TaggedStackInterpreter) { | |
| 2588 for (int i = 0; i < max_locals; i++) { | |
| 2589 // copy only each local separately to the buffer avoiding the tag | |
| 2590 buf[i] = *fr.interpreter_frame_local_at(max_locals-i-1); | |
| 2591 } | |
| 2592 } else { | |
| 2593 Copy::disjoint_words( | |
| 2594 (HeapWord*)fr.interpreter_frame_local_at(max_locals-1), | |
| 2595 (HeapWord*)&buf[0], | |
| 2596 max_locals); | |
| 2597 } | |
| 2598 | |
| 2599 // Inflate locks. Copy the displaced headers. Be careful, there can be holes. | |
| 2600 int i = max_locals; | |
| 2601 for( BasicObjectLock *kptr2 = fr.interpreter_frame_monitor_end(); | |
| 2602 kptr2 < fr.interpreter_frame_monitor_begin(); | |
| 2603 kptr2 = fr.next_monitor_in_interpreter_frame(kptr2) ) { | |
| 2604 if( kptr2->obj() != NULL) { // Avoid 'holes' in the monitor array | |
| 2605 BasicLock *lock = kptr2->lock(); | |
| 2606 // Inflate so the displaced header becomes position-independent | |
| 2607 if (lock->displaced_header()->is_unlocked()) | |
| 2608 ObjectSynchronizer::inflate_helper(kptr2->obj()); | |
| 2609 // Now the displaced header is free to move | |
| 2610 buf[i++] = (intptr_t)lock->displaced_header(); | |
| 2611 buf[i++] = (intptr_t)kptr2->obj(); | |
| 2612 } | |
| 2613 } | |
| 2614 assert( i - max_locals == active_monitor_count*2, "found the expected number of monitors" ); | |
| 2615 | |
| 2616 return buf; | |
| 2617 JRT_END | |
| 2618 | |
| 2619 JRT_LEAF(void, SharedRuntime::OSR_migration_end( intptr_t* buf) ) | |
| 2620 FREE_C_HEAP_ARRAY(intptr_t,buf); | |
| 2621 JRT_END | |
| 2622 | |
| 2623 #ifndef PRODUCT | |
| 2624 bool AdapterHandlerLibrary::contains(CodeBlob* b) { | |
|
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2625 AdapterHandlerTableIterator iter(_adapters); |
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2626 while (iter.has_next()) { |
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2627 AdapterHandlerEntry* a = iter.next(); |
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2628 if ( b == CodeCache::find_blob(a->get_i2c_entry()) ) return true; |
| 0 | 2629 } |
| 2630 return false; | |
| 2631 } | |
| 2632 | |
| 2633 void AdapterHandlerLibrary::print_handler(CodeBlob* b) { | |
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2634 AdapterHandlerTableIterator iter(_adapters); |
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2635 while (iter.has_next()) { |
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2636 AdapterHandlerEntry* a = iter.next(); |
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2637 if ( b == CodeCache::find_blob(a->get_i2c_entry()) ) { |
| 0 | 2638 tty->print("Adapter for signature: "); |
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2639 tty->print_cr("%s i2c: " INTPTR_FORMAT " c2i: " INTPTR_FORMAT " c2iUV: " INTPTR_FORMAT, |
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2640 a->fingerprint()->as_string(), |
| 0 | 2641 a->get_i2c_entry(), a->get_c2i_entry(), a->get_c2i_unverified_entry()); |
| 2642 return; | |
| 2643 } | |
| 2644 } | |
| 2645 assert(false, "Should have found handler"); | |
| 2646 } | |
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2647 |
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2648 void AdapterHandlerLibrary::print_statistics() { |
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2649 _adapters->print_statistics(); |
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2650 } |
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2651 |
| 0 | 2652 #endif /* PRODUCT */ |