Mercurial > hg > truffle
annotate src/share/vm/runtime/sharedRuntime.cpp @ 1429:abc670a709dc
* -XX:TraceC1X=0...5 controls the native c1x tracing
* -Dc1x.debug=true turns on the logging proxies and lots of log output on the java side
* provide more information about types to the compiler (type hierarchy, etc)
* provide exception handler tables to the compiler
* add exception handlers to the nmethod
* correct implementation of ExceptionObject
* exception handling/unwinding entry points
* modified versions of handle/unwind exception stubs using standard calling conventions
* exception throwing
* implicit null pointer exception, implicit div by 0 exception
* arraystore/classcast/arrayindex exceptions
* checkcast implementation
* newarray, anewarray, multinewarray implementation
* correct new instance initialization
* access to java class mirrors (for ldc)
* unresolved methods
* class resolving - class patching (asssembly prototype copying)
| author | Lukas Stadler <lukas.stadler@oracle.com> |
|---|---|
| date | Tue, 31 Aug 2010 22:13:30 -0700 |
| parents | 9f5b60a14736 |
| children | 72cfb36c6bb2 |
| rev | line source |
|---|---|
| 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 | |
| 1295 | 259 address SharedRuntime::raw_exception_handler_for_return_address(JavaThread* thread, address return_address) { |
| 0 | 260 assert(frame::verify_return_pc(return_address), "must be a return pc"); |
| 261 | |
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262 // Reset MethodHandle flag. |
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263 thread->set_is_method_handle_return(false); |
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264 |
| 0 | 265 // the fastest case first |
| 266 CodeBlob* blob = CodeCache::find_blob(return_address); | |
| 267 if (blob != NULL && blob->is_nmethod()) { | |
| 268 nmethod* code = (nmethod*)blob; | |
| 269 assert(code != NULL, "nmethod must be present"); | |
| 1295 | 270 // Check if the return address is a MethodHandle call site. |
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271 thread->set_is_method_handle_return(code->is_method_handle_return(return_address)); |
| 0 | 272 // native nmethods don't have exception handlers |
| 273 assert(!code->is_native_method(), "no exception handler"); | |
| 274 assert(code->header_begin() != code->exception_begin(), "no exception handler"); | |
| 275 if (code->is_deopt_pc(return_address)) { | |
| 276 return SharedRuntime::deopt_blob()->unpack_with_exception(); | |
| 277 } else { | |
| 278 return code->exception_begin(); | |
| 279 } | |
| 280 } | |
| 281 | |
| 282 // Entry code | |
| 283 if (StubRoutines::returns_to_call_stub(return_address)) { | |
| 284 return StubRoutines::catch_exception_entry(); | |
| 285 } | |
| 286 // Interpreted code | |
| 287 if (Interpreter::contains(return_address)) { | |
| 288 return Interpreter::rethrow_exception_entry(); | |
| 289 } | |
| 290 | |
| 291 // Compiled code | |
| 292 if (CodeCache::contains(return_address)) { | |
| 293 CodeBlob* blob = CodeCache::find_blob(return_address); | |
| 294 if (blob->is_nmethod()) { | |
| 295 nmethod* code = (nmethod*)blob; | |
| 296 assert(code != NULL, "nmethod must be present"); | |
| 1295 | 297 // Check if the return address is a MethodHandle call site. |
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298 thread->set_is_method_handle_return(code->is_method_handle_return(return_address)); |
| 0 | 299 assert(code->header_begin() != code->exception_begin(), "no exception handler"); |
| 300 return code->exception_begin(); | |
| 301 } | |
| 302 if (blob->is_runtime_stub()) { | |
| 303 ShouldNotReachHere(); // callers are responsible for skipping runtime stub frames | |
| 304 } | |
| 305 } | |
| 306 guarantee(!VtableStubs::contains(return_address), "NULL exceptions in vtables should have been handled already!"); | |
| 307 #ifndef PRODUCT | |
| 308 { ResourceMark rm; | |
| 309 tty->print_cr("No exception handler found for exception at " INTPTR_FORMAT " - potential problems:", return_address); | |
| 310 tty->print_cr("a) exception happened in (new?) code stubs/buffers that is not handled here"); | |
| 311 tty->print_cr("b) other problem"); | |
| 312 } | |
| 313 #endif // PRODUCT | |
| 314 ShouldNotReachHere(); | |
| 315 return NULL; | |
| 316 } | |
| 317 | |
| 318 | |
| 1295 | 319 JRT_LEAF(address, SharedRuntime::exception_handler_for_return_address(JavaThread* thread, address return_address)) |
| 320 return raw_exception_handler_for_return_address(thread, return_address); | |
| 0 | 321 JRT_END |
| 322 | |
| 1295 | 323 |
| 0 | 324 address SharedRuntime::get_poll_stub(address pc) { |
| 325 address stub; | |
| 326 // Look up the code blob | |
| 327 CodeBlob *cb = CodeCache::find_blob(pc); | |
| 328 | |
| 329 // Should be an nmethod | |
| 330 assert( cb && cb->is_nmethod(), "safepoint polling: pc must refer to an nmethod" ); | |
| 331 | |
| 332 // Look up the relocation information | |
| 333 assert( ((nmethod*)cb)->is_at_poll_or_poll_return(pc), | |
| 334 "safepoint polling: type must be poll" ); | |
| 335 | |
| 336 assert( ((NativeInstruction*)pc)->is_safepoint_poll(), | |
| 337 "Only polling locations are used for safepoint"); | |
| 338 | |
| 339 bool at_poll_return = ((nmethod*)cb)->is_at_poll_return(pc); | |
| 340 if (at_poll_return) { | |
| 341 assert(SharedRuntime::polling_page_return_handler_blob() != NULL, | |
| 342 "polling page return stub not created yet"); | |
| 343 stub = SharedRuntime::polling_page_return_handler_blob()->instructions_begin(); | |
| 344 } else { | |
| 345 assert(SharedRuntime::polling_page_safepoint_handler_blob() != NULL, | |
| 346 "polling page safepoint stub not created yet"); | |
| 347 stub = SharedRuntime::polling_page_safepoint_handler_blob()->instructions_begin(); | |
| 348 } | |
| 349 #ifndef PRODUCT | |
| 350 if( TraceSafepoint ) { | |
| 351 char buf[256]; | |
| 352 jio_snprintf(buf, sizeof(buf), | |
| 353 "... found polling page %s exception at pc = " | |
| 354 INTPTR_FORMAT ", stub =" INTPTR_FORMAT, | |
| 355 at_poll_return ? "return" : "loop", | |
| 356 (intptr_t)pc, (intptr_t)stub); | |
| 357 tty->print_raw_cr(buf); | |
| 358 } | |
| 359 #endif // PRODUCT | |
| 360 return stub; | |
| 361 } | |
| 362 | |
| 363 | |
| 364 oop SharedRuntime::retrieve_receiver( symbolHandle sig, frame caller ) { | |
| 365 assert(caller.is_interpreted_frame(), ""); | |
| 366 int args_size = ArgumentSizeComputer(sig).size() + 1; | |
| 367 assert(args_size <= caller.interpreter_frame_expression_stack_size(), "receiver must be on interpreter stack"); | |
| 368 oop result = (oop) *caller.interpreter_frame_tos_at(args_size - 1); | |
| 369 assert(Universe::heap()->is_in(result) && result->is_oop(), "receiver must be an oop"); | |
| 370 return result; | |
| 371 } | |
| 372 | |
| 373 | |
| 374 void SharedRuntime::throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception) { | |
|
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375 if (JvmtiExport::can_post_on_exceptions()) { |
| 0 | 376 vframeStream vfst(thread, true); |
| 377 methodHandle method = methodHandle(thread, vfst.method()); | |
| 378 address bcp = method()->bcp_from(vfst.bci()); | |
| 379 JvmtiExport::post_exception_throw(thread, method(), bcp, h_exception()); | |
| 380 } | |
| 381 Exceptions::_throw(thread, __FILE__, __LINE__, h_exception); | |
| 382 } | |
| 383 | |
| 384 void SharedRuntime::throw_and_post_jvmti_exception(JavaThread *thread, symbolOop name, const char *message) { | |
| 385 Handle h_exception = Exceptions::new_exception(thread, name, message); | |
| 386 throw_and_post_jvmti_exception(thread, h_exception); | |
| 387 } | |
| 388 | |
|
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389 // The interpreter code to call this tracing function is only |
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390 // called/generated when TraceRedefineClasses has the right bits |
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391 // set. Since obsolete methods are never compiled, we don't have |
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392 // to modify the compilers to generate calls to this function. |
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393 // |
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394 JRT_LEAF(int, SharedRuntime::rc_trace_method_entry( |
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395 JavaThread* thread, methodOopDesc* method)) |
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396 assert(RC_TRACE_IN_RANGE(0x00001000, 0x00002000), "wrong call"); |
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397 |
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398 if (method->is_obsolete()) { |
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399 // We are calling an obsolete method, but this is not necessarily |
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400 // an error. Our method could have been redefined just after we |
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401 // fetched the methodOop from the constant pool. |
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402 |
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403 // RC_TRACE macro has an embedded ResourceMark |
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404 RC_TRACE_WITH_THREAD(0x00001000, thread, |
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405 ("calling obsolete method '%s'", |
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406 method->name_and_sig_as_C_string())); |
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407 if (RC_TRACE_ENABLED(0x00002000)) { |
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408 // this option is provided to debug calls to obsolete methods |
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409 guarantee(false, "faulting at call to an obsolete method."); |
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410 } |
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411 } |
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412 return 0; |
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413 JRT_END |
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414 |
| 0 | 415 // ret_pc points into caller; we are returning caller's exception handler |
| 416 // for given exception | |
| 417 address SharedRuntime::compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception, | |
| 418 bool force_unwind, bool top_frame_only) { | |
| 419 assert(nm != NULL, "must exist"); | |
| 420 ResourceMark rm; | |
| 421 | |
| 422 ScopeDesc* sd = nm->scope_desc_at(ret_pc); | |
| 423 // determine handler bci, if any | |
| 424 EXCEPTION_MARK; | |
| 425 | |
| 426 int handler_bci = -1; | |
| 427 int scope_depth = 0; | |
| 428 if (!force_unwind) { | |
| 429 int bci = sd->bci(); | |
| 430 do { | |
| 431 bool skip_scope_increment = false; | |
| 432 // exception handler lookup | |
| 433 KlassHandle ek (THREAD, exception->klass()); | |
| 434 handler_bci = sd->method()->fast_exception_handler_bci_for(ek, bci, THREAD); | |
| 435 if (HAS_PENDING_EXCEPTION) { | |
| 436 // We threw an exception while trying to find the exception handler. | |
| 437 // Transfer the new exception to the exception handle which will | |
| 438 // be set into thread local storage, and do another lookup for an | |
| 439 // exception handler for this exception, this time starting at the | |
| 440 // BCI of the exception handler which caused the exception to be | |
| 441 // thrown (bugs 4307310 and 4546590). Set "exception" reference | |
| 442 // argument to ensure that the correct exception is thrown (4870175). | |
| 443 exception = Handle(THREAD, PENDING_EXCEPTION); | |
| 444 CLEAR_PENDING_EXCEPTION; | |
| 445 if (handler_bci >= 0) { | |
| 446 bci = handler_bci; | |
| 447 handler_bci = -1; | |
| 448 skip_scope_increment = true; | |
| 449 } | |
| 450 } | |
| 451 if (!top_frame_only && handler_bci < 0 && !skip_scope_increment) { | |
| 452 sd = sd->sender(); | |
| 453 if (sd != NULL) { | |
| 454 bci = sd->bci(); | |
| 455 } | |
| 456 ++scope_depth; | |
| 457 } | |
| 458 } while (!top_frame_only && handler_bci < 0 && sd != NULL); | |
| 459 } | |
| 460 | |
| 461 // found handling method => lookup exception handler | |
| 462 int catch_pco = ret_pc - nm->instructions_begin(); | |
| 463 | |
| 464 ExceptionHandlerTable table(nm); | |
| 465 HandlerTableEntry *t = table.entry_for(catch_pco, handler_bci, scope_depth); | |
| 466 if (t == NULL && (nm->is_compiled_by_c1() || handler_bci != -1)) { | |
| 467 // Allow abbreviated catch tables. The idea is to allow a method | |
| 468 // to materialize its exceptions without committing to the exact | |
| 469 // routing of exceptions. In particular this is needed for adding | |
| 470 // a synthethic handler to unlock monitors when inlining | |
| 471 // synchonized methods since the unlock path isn't represented in | |
| 472 // the bytecodes. | |
| 473 t = table.entry_for(catch_pco, -1, 0); | |
| 474 } | |
| 475 | |
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476 #ifdef COMPILER1 |
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477 if (t == NULL && nm->is_compiled_by_c1()) { |
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478 assert(nm->unwind_handler_begin() != NULL, ""); |
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479 return nm->unwind_handler_begin(); |
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480 } |
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481 #endif |
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482 |
| 0 | 483 if (t == NULL) { |
| 484 tty->print_cr("MISSING EXCEPTION HANDLER for pc " INTPTR_FORMAT " and handler bci %d", ret_pc, handler_bci); | |
| 485 tty->print_cr(" Exception:"); | |
| 486 exception->print(); | |
| 487 tty->cr(); | |
| 488 tty->print_cr(" Compiled exception table :"); | |
| 489 table.print(); | |
| 490 nm->print_code(); | |
| 491 guarantee(false, "missing exception handler"); | |
| 492 return NULL; | |
| 493 } | |
| 494 | |
| 495 return nm->instructions_begin() + t->pco(); | |
| 496 } | |
| 497 | |
| 498 JRT_ENTRY(void, SharedRuntime::throw_AbstractMethodError(JavaThread* thread)) | |
| 499 // These errors occur only at call sites | |
| 500 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_AbstractMethodError()); | |
| 501 JRT_END | |
| 502 | |
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503 JRT_ENTRY(void, SharedRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) |
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504 // These errors occur only at call sites |
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505 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_IncompatibleClassChangeError(), "vtable stub"); |
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506 JRT_END |
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507 |
| 0 | 508 JRT_ENTRY(void, SharedRuntime::throw_ArithmeticException(JavaThread* thread)) |
| 509 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArithmeticException(), "/ by zero"); | |
| 510 JRT_END | |
| 511 | |
| 512 JRT_ENTRY(void, SharedRuntime::throw_NullPointerException(JavaThread* thread)) | |
| 513 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException()); | |
| 514 JRT_END | |
| 515 | |
| 516 JRT_ENTRY(void, SharedRuntime::throw_NullPointerException_at_call(JavaThread* thread)) | |
| 517 // This entry point is effectively only used for NullPointerExceptions which occur at inline | |
| 518 // cache sites (when the callee activation is not yet set up) so we are at a call site | |
| 519 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException()); | |
| 520 JRT_END | |
| 521 | |
| 522 JRT_ENTRY(void, SharedRuntime::throw_StackOverflowError(JavaThread* thread)) | |
| 523 // We avoid using the normal exception construction in this case because | |
| 524 // it performs an upcall to Java, and we're already out of stack space. | |
| 525 klassOop k = SystemDictionary::StackOverflowError_klass(); | |
| 526 oop exception_oop = instanceKlass::cast(k)->allocate_instance(CHECK); | |
| 527 Handle exception (thread, exception_oop); | |
| 528 if (StackTraceInThrowable) { | |
| 529 java_lang_Throwable::fill_in_stack_trace(exception); | |
| 530 } | |
| 531 throw_and_post_jvmti_exception(thread, exception); | |
| 532 JRT_END | |
| 533 | |
| 534 address SharedRuntime::continuation_for_implicit_exception(JavaThread* thread, | |
| 535 address pc, | |
| 536 SharedRuntime::ImplicitExceptionKind exception_kind) | |
| 537 { | |
| 538 address target_pc = NULL; | |
| 539 | |
| 540 if (Interpreter::contains(pc)) { | |
| 541 #ifdef CC_INTERP | |
| 542 // C++ interpreter doesn't throw implicit exceptions | |
| 543 ShouldNotReachHere(); | |
| 544 #else | |
| 545 switch (exception_kind) { | |
| 546 case IMPLICIT_NULL: return Interpreter::throw_NullPointerException_entry(); | |
| 547 case IMPLICIT_DIVIDE_BY_ZERO: return Interpreter::throw_ArithmeticException_entry(); | |
| 548 case STACK_OVERFLOW: return Interpreter::throw_StackOverflowError_entry(); | |
| 549 default: ShouldNotReachHere(); | |
| 550 } | |
| 551 #endif // !CC_INTERP | |
| 552 } else { | |
| 553 switch (exception_kind) { | |
| 554 case STACK_OVERFLOW: { | |
| 555 // Stack overflow only occurs upon frame setup; the callee is | |
| 556 // going to be unwound. Dispatch to a shared runtime stub | |
| 557 // which will cause the StackOverflowError to be fabricated | |
| 558 // and processed. | |
| 559 // For stack overflow in deoptimization blob, cleanup thread. | |
| 560 if (thread->deopt_mark() != NULL) { | |
| 561 Deoptimization::cleanup_deopt_info(thread, NULL); | |
| 562 } | |
| 563 return StubRoutines::throw_StackOverflowError_entry(); | |
| 564 } | |
| 565 | |
| 566 case IMPLICIT_NULL: { | |
| 567 if (VtableStubs::contains(pc)) { | |
| 568 // We haven't yet entered the callee frame. Fabricate an | |
| 569 // exception and begin dispatching it in the caller. Since | |
| 570 // the caller was at a call site, it's safe to destroy all | |
| 571 // caller-saved registers, as these entry points do. | |
| 572 VtableStub* vt_stub = VtableStubs::stub_containing(pc); | |
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573 |
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574 // If vt_stub is NULL, then return NULL to signal handler to report the SEGV error. |
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575 if (vt_stub == NULL) return NULL; |
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576 |
| 0 | 577 if (vt_stub->is_abstract_method_error(pc)) { |
| 578 assert(!vt_stub->is_vtable_stub(), "should never see AbstractMethodErrors from vtable-type VtableStubs"); | |
| 579 return StubRoutines::throw_AbstractMethodError_entry(); | |
| 580 } else { | |
| 581 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
| 582 } | |
| 583 } else { | |
| 584 CodeBlob* cb = CodeCache::find_blob(pc); | |
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585 |
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586 // If code blob is NULL, then return NULL to signal handler to report the SEGV error. |
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587 if (cb == NULL) return NULL; |
| 0 | 588 |
| 589 // Exception happened in CodeCache. Must be either: | |
| 590 // 1. Inline-cache check in C2I handler blob, | |
| 591 // 2. Inline-cache check in nmethod, or | |
| 592 // 3. Implict null exception in nmethod | |
| 593 | |
| 594 if (!cb->is_nmethod()) { | |
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595 guarantee(cb->is_adapter_blob() || cb->is_method_handles_adapter_blob(), |
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596 "exception happened outside interpreter, nmethods and vtable stubs (1)"); |
| 0 | 597 // There is no handler here, so we will simply unwind. |
| 598 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
| 599 } | |
| 600 | |
| 601 // Otherwise, it's an nmethod. Consult its exception handlers. | |
| 602 nmethod* nm = (nmethod*)cb; | |
| 603 if (nm->inlinecache_check_contains(pc)) { | |
| 604 // exception happened inside inline-cache check code | |
| 605 // => the nmethod is not yet active (i.e., the frame | |
| 606 // is not set up yet) => use return address pushed by | |
| 607 // caller => don't push another return address | |
| 608 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
| 609 } | |
| 610 | |
| 611 #ifndef PRODUCT | |
| 612 _implicit_null_throws++; | |
| 613 #endif | |
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614 if (UseC1X) { |
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615 target_pc = Runtime1::entry_for(Runtime1::c1x_global_implicit_null_id); |
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616 } else { |
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617 target_pc = nm->continuation_for_implicit_exception(pc); |
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618 } |
| 1250 | 619 // If there's an unexpected fault, target_pc might be NULL, |
| 620 // in which case we want to fall through into the normal | |
| 621 // error handling code. | |
| 0 | 622 } |
| 623 | |
| 624 break; // fall through | |
| 625 } | |
| 626 | |
| 627 | |
| 628 case IMPLICIT_DIVIDE_BY_ZERO: { | |
| 629 nmethod* nm = CodeCache::find_nmethod(pc); | |
| 630 guarantee(nm != NULL, "must have containing nmethod for implicit division-by-zero exceptions"); | |
| 631 #ifndef PRODUCT | |
| 632 _implicit_div0_throws++; | |
| 633 #endif | |
|
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634 if (UseC1X) { |
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635 target_pc = Runtime1::entry_for(Runtime1::c1x_throw_div0_exception_id); |
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636 } else { |
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637 target_pc = nm->continuation_for_implicit_exception(pc); |
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638 } |
| 1250 | 639 // If there's an unexpected fault, target_pc might be NULL, |
| 640 // in which case we want to fall through into the normal | |
| 641 // error handling code. | |
| 0 | 642 break; // fall through |
| 643 } | |
| 644 | |
| 645 default: ShouldNotReachHere(); | |
| 646 } | |
| 647 | |
| 648 assert(exception_kind == IMPLICIT_NULL || exception_kind == IMPLICIT_DIVIDE_BY_ZERO, "wrong implicit exception kind"); | |
| 649 | |
| 650 // for AbortVMOnException flag | |
| 651 NOT_PRODUCT(Exceptions::debug_check_abort("java.lang.NullPointerException")); | |
| 652 if (exception_kind == IMPLICIT_NULL) { | |
| 653 Events::log("Implicit null exception at " INTPTR_FORMAT " to " INTPTR_FORMAT, pc, target_pc); | |
| 654 } else { | |
| 655 Events::log("Implicit division by zero exception at " INTPTR_FORMAT " to " INTPTR_FORMAT, pc, target_pc); | |
| 656 } | |
| 657 return target_pc; | |
| 658 } | |
| 659 | |
| 660 ShouldNotReachHere(); | |
| 661 return NULL; | |
| 662 } | |
| 663 | |
| 664 | |
| 665 JNI_ENTRY(void, throw_unsatisfied_link_error(JNIEnv* env, ...)) | |
| 666 { | |
| 667 THROW(vmSymbols::java_lang_UnsatisfiedLinkError()); | |
| 668 } | |
| 669 JNI_END | |
| 670 | |
| 671 | |
| 672 address SharedRuntime::native_method_throw_unsatisfied_link_error_entry() { | |
| 673 return CAST_FROM_FN_PTR(address, &throw_unsatisfied_link_error); | |
| 674 } | |
| 675 | |
| 676 | |
| 677 #ifndef PRODUCT | |
| 678 JRT_ENTRY(intptr_t, SharedRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2)) | |
| 679 const frame f = thread->last_frame(); | |
| 680 assert(f.is_interpreted_frame(), "must be an interpreted frame"); | |
| 681 #ifndef PRODUCT | |
| 682 methodHandle mh(THREAD, f.interpreter_frame_method()); | |
| 683 BytecodeTracer::trace(mh, f.interpreter_frame_bcp(), tos, tos2); | |
| 684 #endif // !PRODUCT | |
| 685 return preserve_this_value; | |
| 686 JRT_END | |
| 687 #endif // !PRODUCT | |
| 688 | |
| 689 | |
| 690 JRT_ENTRY(void, SharedRuntime::yield_all(JavaThread* thread, int attempts)) | |
| 691 os::yield_all(attempts); | |
| 692 JRT_END | |
| 693 | |
| 694 | |
| 695 JRT_ENTRY_NO_ASYNC(void, SharedRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) | |
| 696 assert(obj->is_oop(), "must be a valid oop"); | |
| 697 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise"); | |
| 698 instanceKlass::register_finalizer(instanceOop(obj), CHECK); | |
| 699 JRT_END | |
| 700 | |
| 701 | |
| 702 jlong SharedRuntime::get_java_tid(Thread* thread) { | |
| 703 if (thread != NULL) { | |
| 704 if (thread->is_Java_thread()) { | |
| 705 oop obj = ((JavaThread*)thread)->threadObj(); | |
| 706 return (obj == NULL) ? 0 : java_lang_Thread::thread_id(obj); | |
| 707 } | |
| 708 } | |
| 709 return 0; | |
| 710 } | |
| 711 | |
| 712 /** | |
| 713 * This function ought to be a void function, but cannot be because | |
| 714 * it gets turned into a tail-call on sparc, which runs into dtrace bug | |
| 715 * 6254741. Once that is fixed we can remove the dummy return value. | |
| 716 */ | |
| 717 int SharedRuntime::dtrace_object_alloc(oopDesc* o) { | |
| 718 return dtrace_object_alloc_base(Thread::current(), o); | |
| 719 } | |
| 720 | |
| 721 int SharedRuntime::dtrace_object_alloc_base(Thread* thread, oopDesc* o) { | |
| 722 assert(DTraceAllocProbes, "wrong call"); | |
| 723 Klass* klass = o->blueprint(); | |
| 724 int size = o->size(); | |
| 725 symbolOop name = klass->name(); | |
| 726 HS_DTRACE_PROBE4(hotspot, object__alloc, get_java_tid(thread), | |
| 727 name->bytes(), name->utf8_length(), size * HeapWordSize); | |
| 728 return 0; | |
| 729 } | |
| 730 | |
| 731 JRT_LEAF(int, SharedRuntime::dtrace_method_entry( | |
| 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__entry, 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 JRT_LEAF(int, SharedRuntime::dtrace_method_exit( | |
| 745 JavaThread* thread, methodOopDesc* method)) | |
| 746 assert(DTraceMethodProbes, "wrong call"); | |
| 747 symbolOop kname = method->klass_name(); | |
| 748 symbolOop name = method->name(); | |
| 749 symbolOop sig = method->signature(); | |
| 750 HS_DTRACE_PROBE7(hotspot, method__return, get_java_tid(thread), | |
| 751 kname->bytes(), kname->utf8_length(), | |
| 752 name->bytes(), name->utf8_length(), | |
| 753 sig->bytes(), sig->utf8_length()); | |
| 754 return 0; | |
| 755 JRT_END | |
| 756 | |
| 757 | |
| 758 // Finds receiver, CallInfo (i.e. receiver method), and calling bytecode) | |
| 759 // for a call current in progress, i.e., arguments has been pushed on stack | |
| 760 // put callee has not been invoked yet. Used by: resolve virtual/static, | |
| 761 // vtable updates, etc. Caller frame must be compiled. | |
| 762 Handle SharedRuntime::find_callee_info(JavaThread* thread, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS) { | |
| 763 ResourceMark rm(THREAD); | |
| 764 | |
| 765 // last java frame on stack (which includes native call frames) | |
| 766 vframeStream vfst(thread, true); // Do not skip and javaCalls | |
| 767 | |
| 768 return find_callee_info_helper(thread, vfst, bc, callinfo, CHECK_(Handle())); | |
| 769 } | |
| 770 | |
| 771 | |
| 772 // Finds receiver, CallInfo (i.e. receiver method), and calling bytecode | |
| 773 // for a call current in progress, i.e., arguments has been pushed on stack | |
| 774 // but callee has not been invoked yet. Caller frame must be compiled. | |
| 775 Handle SharedRuntime::find_callee_info_helper(JavaThread* thread, | |
| 776 vframeStream& vfst, | |
| 777 Bytecodes::Code& bc, | |
| 778 CallInfo& callinfo, TRAPS) { | |
| 779 Handle receiver; | |
| 780 Handle nullHandle; //create a handy null handle for exception returns | |
| 781 | |
| 782 assert(!vfst.at_end(), "Java frame must exist"); | |
| 783 | |
| 784 // Find caller and bci from vframe | |
| 785 methodHandle caller (THREAD, vfst.method()); | |
| 786 int bci = vfst.bci(); | |
| 787 | |
| 788 // Find bytecode | |
| 789 Bytecode_invoke* bytecode = Bytecode_invoke_at(caller, bci); | |
| 790 bc = bytecode->adjusted_invoke_code(); | |
| 791 int bytecode_index = bytecode->index(); | |
| 792 | |
| 793 // Find receiver for non-static call | |
| 794 if (bc != Bytecodes::_invokestatic) { | |
| 795 // This register map must be update since we need to find the receiver for | |
| 796 // compiled frames. The receiver might be in a register. | |
| 797 RegisterMap reg_map2(thread); | |
| 798 frame stubFrame = thread->last_frame(); | |
| 799 // Caller-frame is a compiled frame | |
| 800 frame callerFrame = stubFrame.sender(®_map2); | |
| 801 | |
| 802 methodHandle callee = bytecode->static_target(CHECK_(nullHandle)); | |
| 803 if (callee.is_null()) { | |
| 804 THROW_(vmSymbols::java_lang_NoSuchMethodException(), nullHandle); | |
| 805 } | |
| 806 // Retrieve from a compiled argument list | |
| 807 receiver = Handle(THREAD, callerFrame.retrieve_receiver(®_map2)); | |
| 808 | |
| 809 if (receiver.is_null()) { | |
| 810 THROW_(vmSymbols::java_lang_NullPointerException(), nullHandle); | |
| 811 } | |
| 812 } | |
| 813 | |
| 814 // Resolve method. This is parameterized by bytecode. | |
| 815 constantPoolHandle constants (THREAD, caller->constants()); | |
| 816 assert (receiver.is_null() || receiver->is_oop(), "wrong receiver"); | |
| 817 LinkResolver::resolve_invoke(callinfo, receiver, constants, bytecode_index, bc, CHECK_(nullHandle)); | |
| 818 | |
| 819 #ifdef ASSERT | |
| 820 // Check that the receiver klass is of the right subtype and that it is initialized for virtual calls | |
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821 if (bc != Bytecodes::_invokestatic && bc != Bytecodes::_invokedynamic) { |
| 0 | 822 assert(receiver.not_null(), "should have thrown exception"); |
| 823 KlassHandle receiver_klass (THREAD, receiver->klass()); | |
| 824 klassOop rk = constants->klass_ref_at(bytecode_index, CHECK_(nullHandle)); | |
| 825 // klass is already loaded | |
| 826 KlassHandle static_receiver_klass (THREAD, rk); | |
| 827 assert(receiver_klass->is_subtype_of(static_receiver_klass()), "actual receiver must be subclass of static receiver klass"); | |
| 828 if (receiver_klass->oop_is_instance()) { | |
| 829 if (instanceKlass::cast(receiver_klass())->is_not_initialized()) { | |
| 830 tty->print_cr("ERROR: Klass not yet initialized!!"); | |
| 831 receiver_klass.print(); | |
| 832 } | |
| 833 assert (!instanceKlass::cast(receiver_klass())->is_not_initialized(), "receiver_klass must be initialized"); | |
| 834 } | |
| 835 } | |
| 836 #endif | |
| 837 | |
| 838 return receiver; | |
| 839 } | |
| 840 | |
| 841 methodHandle SharedRuntime::find_callee_method(JavaThread* thread, TRAPS) { | |
| 842 ResourceMark rm(THREAD); | |
| 843 // We need first to check if any Java activations (compiled, interpreted) | |
| 844 // exist on the stack since last JavaCall. If not, we need | |
| 845 // to get the target method from the JavaCall wrapper. | |
| 846 vframeStream vfst(thread, true); // Do not skip any javaCalls | |
| 847 methodHandle callee_method; | |
| 848 if (vfst.at_end()) { | |
| 849 // No Java frames were found on stack since we did the JavaCall. | |
| 850 // Hence the stack can only contain an entry_frame. We need to | |
| 851 // find the target method from the stub frame. | |
| 852 RegisterMap reg_map(thread, false); | |
| 853 frame fr = thread->last_frame(); | |
| 854 assert(fr.is_runtime_frame(), "must be a runtimeStub"); | |
| 855 fr = fr.sender(®_map); | |
| 856 assert(fr.is_entry_frame(), "must be"); | |
| 857 // fr is now pointing to the entry frame. | |
| 858 callee_method = methodHandle(THREAD, fr.entry_frame_call_wrapper()->callee_method()); | |
| 859 assert(fr.entry_frame_call_wrapper()->receiver() == NULL || !callee_method->is_static(), "non-null receiver for static call??"); | |
| 860 } else { | |
| 861 Bytecodes::Code bc; | |
| 862 CallInfo callinfo; | |
| 863 find_callee_info_helper(thread, vfst, bc, callinfo, CHECK_(methodHandle())); | |
| 864 callee_method = callinfo.selected_method(); | |
| 865 } | |
| 866 assert(callee_method()->is_method(), "must be"); | |
| 867 return callee_method; | |
| 868 } | |
| 869 | |
| 870 // Resolves a call. | |
| 871 methodHandle SharedRuntime::resolve_helper(JavaThread *thread, | |
| 872 bool is_virtual, | |
| 873 bool is_optimized, TRAPS) { | |
| 874 methodHandle callee_method; | |
| 875 callee_method = resolve_sub_helper(thread, is_virtual, is_optimized, THREAD); | |
| 876 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { | |
| 877 int retry_count = 0; | |
| 878 while (!HAS_PENDING_EXCEPTION && callee_method->is_old() && | |
| 1142 | 879 callee_method->method_holder() != SystemDictionary::Object_klass()) { |
| 0 | 880 // If has a pending exception then there is no need to re-try to |
| 881 // resolve this method. | |
| 882 // If the method has been redefined, we need to try again. | |
| 883 // Hack: we have no way to update the vtables of arrays, so don't | |
| 884 // require that java.lang.Object has been updated. | |
| 885 | |
| 886 // It is very unlikely that method is redefined more than 100 times | |
| 887 // in the middle of resolve. If it is looping here more than 100 times | |
| 888 // means then there could be a bug here. | |
| 889 guarantee((retry_count++ < 100), | |
| 890 "Could not resolve to latest version of redefined method"); | |
| 891 // method is redefined in the middle of resolve so re-try. | |
| 892 callee_method = resolve_sub_helper(thread, is_virtual, is_optimized, THREAD); | |
| 893 } | |
| 894 } | |
| 895 return callee_method; | |
| 896 } | |
| 897 | |
| 898 // Resolves a call. The compilers generate code for calls that go here | |
| 899 // and are patched with the real destination of the call. | |
| 900 methodHandle SharedRuntime::resolve_sub_helper(JavaThread *thread, | |
| 901 bool is_virtual, | |
| 902 bool is_optimized, TRAPS) { | |
| 903 | |
| 904 ResourceMark rm(thread); | |
| 905 RegisterMap cbl_map(thread, false); | |
| 906 frame caller_frame = thread->last_frame().sender(&cbl_map); | |
| 907 | |
| 1295 | 908 CodeBlob* caller_cb = caller_frame.cb(); |
| 909 guarantee(caller_cb != NULL && caller_cb->is_nmethod(), "must be called from nmethod"); | |
| 910 nmethod* caller_nm = caller_cb->as_nmethod_or_null(); | |
| 0 | 911 // make sure caller is not getting deoptimized |
| 912 // and removed before we are done with it. | |
| 913 // CLEANUP - with lazy deopt shouldn't need this lock | |
| 1295 | 914 nmethodLocker caller_lock(caller_nm); |
| 0 | 915 |
| 916 | |
| 917 // determine call info & receiver | |
| 918 // note: a) receiver is NULL for static calls | |
| 919 // b) an exception is thrown if receiver is NULL for non-static calls | |
| 920 CallInfo call_info; | |
| 921 Bytecodes::Code invoke_code = Bytecodes::_illegal; | |
| 922 Handle receiver = find_callee_info(thread, invoke_code, | |
| 923 call_info, CHECK_(methodHandle())); | |
| 924 methodHandle callee_method = call_info.selected_method(); | |
| 925 | |
| 926 assert((!is_virtual && invoke_code == Bytecodes::_invokestatic) || | |
| 927 ( is_virtual && invoke_code != Bytecodes::_invokestatic), "inconsistent bytecode"); | |
| 928 | |
| 929 #ifndef PRODUCT | |
| 930 // tracing/debugging/statistics | |
| 931 int *addr = (is_optimized) ? (&_resolve_opt_virtual_ctr) : | |
| 932 (is_virtual) ? (&_resolve_virtual_ctr) : | |
| 933 (&_resolve_static_ctr); | |
| 934 Atomic::inc(addr); | |
| 935 | |
| 936 if (TraceCallFixup) { | |
| 937 ResourceMark rm(thread); | |
| 938 tty->print("resolving %s%s (%s) call to", | |
| 939 (is_optimized) ? "optimized " : "", (is_virtual) ? "virtual" : "static", | |
| 940 Bytecodes::name(invoke_code)); | |
| 941 callee_method->print_short_name(tty); | |
| 942 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
| 943 } | |
| 944 #endif | |
| 945 | |
| 1295 | 946 // JSR 292 |
| 947 // If the resolved method is a MethodHandle invoke target the call | |
| 948 // site must be a MethodHandle call site. | |
| 949 if (callee_method->is_method_handle_invoke()) { | |
| 950 assert(caller_nm->is_method_handle_return(caller_frame.pc()), "must be MH call site"); | |
| 951 } | |
| 952 | |
| 0 | 953 // Compute entry points. This might require generation of C2I converter |
| 954 // frames, so we cannot be holding any locks here. Furthermore, the | |
| 955 // computation of the entry points is independent of patching the call. We | |
| 956 // always return the entry-point, but we only patch the stub if the call has | |
| 957 // not been deoptimized. Return values: For a virtual call this is an | |
| 958 // (cached_oop, destination address) pair. For a static call/optimized | |
| 959 // virtual this is just a destination address. | |
| 960 | |
| 961 StaticCallInfo static_call_info; | |
| 962 CompiledICInfo virtual_call_info; | |
| 963 | |
| 964 // Make sure the callee nmethod does not get deoptimized and removed before | |
| 965 // we are done patching the code. | |
| 1295 | 966 nmethod* callee_nm = callee_method->code(); |
| 967 nmethodLocker nl_callee(callee_nm); | |
| 0 | 968 #ifdef ASSERT |
| 1295 | 969 address dest_entry_point = callee_nm == NULL ? 0 : callee_nm->entry_point(); // used below |
| 0 | 970 #endif |
| 971 | |
| 972 if (is_virtual) { | |
| 973 assert(receiver.not_null(), "sanity check"); | |
| 974 bool static_bound = call_info.resolved_method()->can_be_statically_bound(); | |
| 975 KlassHandle h_klass(THREAD, receiver->klass()); | |
| 976 CompiledIC::compute_monomorphic_entry(callee_method, h_klass, | |
| 977 is_optimized, static_bound, virtual_call_info, | |
| 978 CHECK_(methodHandle())); | |
| 979 } else { | |
| 980 // static call | |
| 981 CompiledStaticCall::compute_entry(callee_method, static_call_info); | |
| 982 } | |
| 983 | |
| 984 // grab lock, check for deoptimization and potentially patch caller | |
| 985 { | |
| 986 MutexLocker ml_patch(CompiledIC_lock); | |
| 987 | |
| 988 // Now that we are ready to patch if the methodOop was redefined then | |
| 989 // don't update call site and let the caller retry. | |
| 990 | |
| 991 if (!callee_method->is_old()) { | |
| 992 #ifdef ASSERT | |
| 993 // We must not try to patch to jump to an already unloaded method. | |
| 994 if (dest_entry_point != 0) { | |
| 995 assert(CodeCache::find_blob(dest_entry_point) != NULL, | |
| 996 "should not unload nmethod while locked"); | |
| 997 } | |
| 998 #endif | |
| 999 if (is_virtual) { | |
| 1000 CompiledIC* inline_cache = CompiledIC_before(caller_frame.pc()); | |
| 1001 if (inline_cache->is_clean()) { | |
| 1002 inline_cache->set_to_monomorphic(virtual_call_info); | |
| 1003 } | |
| 1004 } else { | |
| 1005 CompiledStaticCall* ssc = compiledStaticCall_before(caller_frame.pc()); | |
| 1006 if (ssc->is_clean()) ssc->set(static_call_info); | |
| 1007 } | |
| 1008 } | |
| 1009 | |
| 1010 } // unlock CompiledIC_lock | |
| 1011 | |
| 1012 return callee_method; | |
| 1013 } | |
| 1014 | |
| 1015 | |
| 1016 // Inline caches exist only in compiled code | |
| 1017 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_ic_miss(JavaThread* thread)) | |
| 1018 #ifdef ASSERT | |
| 1019 RegisterMap reg_map(thread, false); | |
| 1020 frame stub_frame = thread->last_frame(); | |
| 1021 assert(stub_frame.is_runtime_frame(), "sanity check"); | |
| 1022 frame caller_frame = stub_frame.sender(®_map); | |
| 1023 assert(!caller_frame.is_interpreted_frame() && !caller_frame.is_entry_frame(), "unexpected frame"); | |
| 1024 #endif /* ASSERT */ | |
| 1025 | |
| 1026 methodHandle callee_method; | |
| 1027 JRT_BLOCK | |
| 1028 callee_method = SharedRuntime::handle_ic_miss_helper(thread, CHECK_NULL); | |
| 1029 // Return methodOop through TLS | |
| 1030 thread->set_vm_result(callee_method()); | |
| 1031 JRT_BLOCK_END | |
| 1032 // return compiled code entry point after potential safepoints | |
| 1033 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
| 1034 return callee_method->verified_code_entry(); | |
| 1035 JRT_END | |
| 1036 | |
| 1037 | |
| 1038 // Handle call site that has been made non-entrant | |
| 1039 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method(JavaThread* thread)) | |
| 1040 // 6243940 We might end up in here if the callee is deoptimized | |
| 1041 // as we race to call it. We don't want to take a safepoint if | |
| 1042 // the caller was interpreted because the caller frame will look | |
| 1043 // interpreted to the stack walkers and arguments are now | |
| 1044 // "compiled" so it is much better to make this transition | |
| 1045 // invisible to the stack walking code. The i2c path will | |
| 1046 // place the callee method in the callee_target. It is stashed | |
| 1047 // there because if we try and find the callee by normal means a | |
| 1048 // safepoint is possible and have trouble gc'ing the compiled args. | |
| 1049 RegisterMap reg_map(thread, false); | |
| 1050 frame stub_frame = thread->last_frame(); | |
| 1051 assert(stub_frame.is_runtime_frame(), "sanity check"); | |
| 1052 frame caller_frame = stub_frame.sender(®_map); | |
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1054 // MethodHandle invokes don't have a CompiledIC and should always |
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1055 // simply redispatch to the callee_target. |
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1056 address sender_pc = caller_frame.pc(); |
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1057 CodeBlob* sender_cb = caller_frame.cb(); |
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1058 nmethod* sender_nm = sender_cb->as_nmethod_or_null(); |
| 1204 | 1059 bool is_mh_invoke_via_adapter = false; // Direct c2c call or via adapter? |
| 1060 if (sender_nm != NULL && sender_nm->is_method_handle_return(sender_pc)) { | |
| 1061 // If the callee_target is set, then we have come here via an i2c | |
| 1062 // adapter. | |
| 1063 methodOop callee = thread->callee_target(); | |
| 1064 if (callee != NULL) { | |
| 1065 assert(callee->is_method(), "sanity"); | |
| 1066 is_mh_invoke_via_adapter = true; | |
| 1067 } | |
| 1068 } | |
|
1135
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1069 |
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1070 if (caller_frame.is_interpreted_frame() || |
| 1204 | 1071 caller_frame.is_entry_frame() || |
| 1072 is_mh_invoke_via_adapter) { | |
| 0 | 1073 methodOop callee = thread->callee_target(); |
| 1074 guarantee(callee != NULL && callee->is_method(), "bad handshake"); | |
| 1075 thread->set_vm_result(callee); | |
| 1076 thread->set_callee_target(NULL); | |
| 1077 return callee->get_c2i_entry(); | |
| 1078 } | |
| 1079 | |
| 1080 // Must be compiled to compiled path which is safe to stackwalk | |
| 1081 methodHandle callee_method; | |
| 1082 JRT_BLOCK | |
| 1083 // Force resolving of caller (if we called from compiled frame) | |
| 1084 callee_method = SharedRuntime::reresolve_call_site(thread, CHECK_NULL); | |
| 1085 thread->set_vm_result(callee_method()); | |
| 1086 JRT_BLOCK_END | |
| 1087 // return compiled code entry point after potential safepoints | |
| 1088 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
| 1089 return callee_method->verified_code_entry(); | |
| 1090 JRT_END | |
| 1091 | |
| 1092 | |
| 1093 // resolve a static call and patch code | |
| 1094 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_static_call_C(JavaThread *thread )) | |
| 1095 methodHandle callee_method; | |
| 1096 JRT_BLOCK | |
| 1097 callee_method = SharedRuntime::resolve_helper(thread, false, false, CHECK_NULL); | |
| 1098 thread->set_vm_result(callee_method()); | |
| 1099 JRT_BLOCK_END | |
| 1100 // return compiled code entry point after potential safepoints | |
| 1101 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
| 1102 return callee_method->verified_code_entry(); | |
| 1103 JRT_END | |
| 1104 | |
| 1105 | |
| 1106 // resolve virtual call and update inline cache to monomorphic | |
| 1107 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_virtual_call_C(JavaThread *thread )) | |
| 1108 methodHandle callee_method; | |
| 1109 JRT_BLOCK | |
| 1110 callee_method = SharedRuntime::resolve_helper(thread, true, false, CHECK_NULL); | |
| 1111 thread->set_vm_result(callee_method()); | |
| 1112 JRT_BLOCK_END | |
| 1113 // return compiled code entry point after potential safepoints | |
| 1114 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
| 1115 return callee_method->verified_code_entry(); | |
| 1116 JRT_END | |
| 1117 | |
| 1118 | |
| 1119 // Resolve a virtual call that can be statically bound (e.g., always | |
| 1120 // monomorphic, so it has no inline cache). Patch code to resolved target. | |
| 1121 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_opt_virtual_call_C(JavaThread *thread)) | |
| 1122 methodHandle callee_method; | |
| 1123 JRT_BLOCK | |
| 1124 callee_method = SharedRuntime::resolve_helper(thread, true, true, CHECK_NULL); | |
| 1125 thread->set_vm_result(callee_method()); | |
| 1126 JRT_BLOCK_END | |
| 1127 // return compiled code entry point after potential safepoints | |
| 1128 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
| 1129 return callee_method->verified_code_entry(); | |
| 1130 JRT_END | |
| 1131 | |
| 1132 | |
| 1133 | |
| 1134 | |
| 1135 | |
| 1136 methodHandle SharedRuntime::handle_ic_miss_helper(JavaThread *thread, TRAPS) { | |
| 1137 ResourceMark rm(thread); | |
| 1138 CallInfo call_info; | |
| 1139 Bytecodes::Code bc; | |
| 1140 | |
| 1141 // receiver is NULL for static calls. An exception is thrown for NULL | |
| 1142 // receivers for non-static calls | |
| 1143 Handle receiver = find_callee_info(thread, bc, call_info, | |
| 1144 CHECK_(methodHandle())); | |
| 1145 // Compiler1 can produce virtual call sites that can actually be statically bound | |
| 1146 // If we fell thru to below we would think that the site was going megamorphic | |
| 1147 // when in fact the site can never miss. Worse because we'd think it was megamorphic | |
| 1148 // we'd try and do a vtable dispatch however methods that can be statically bound | |
| 1149 // don't have vtable entries (vtable_index < 0) and we'd blow up. So we force a | |
| 1150 // reresolution of the call site (as if we did a handle_wrong_method and not an | |
| 1151 // plain ic_miss) and the site will be converted to an optimized virtual call site | |
| 1152 // never to miss again. I don't believe C2 will produce code like this but if it | |
| 1153 // did this would still be the correct thing to do for it too, hence no ifdef. | |
| 1154 // | |
| 1155 if (call_info.resolved_method()->can_be_statically_bound()) { | |
| 1156 methodHandle callee_method = SharedRuntime::reresolve_call_site(thread, CHECK_(methodHandle())); | |
| 1157 if (TraceCallFixup) { | |
| 1158 RegisterMap reg_map(thread, false); | |
| 1159 frame caller_frame = thread->last_frame().sender(®_map); | |
| 1160 ResourceMark rm(thread); | |
| 1161 tty->print("converting IC miss to reresolve (%s) call to", Bytecodes::name(bc)); | |
| 1162 callee_method->print_short_name(tty); | |
| 1163 tty->print_cr(" from pc: " INTPTR_FORMAT, caller_frame.pc()); | |
| 1164 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
| 1165 } | |
| 1166 return callee_method; | |
| 1167 } | |
| 1168 | |
| 1169 methodHandle callee_method = call_info.selected_method(); | |
| 1170 | |
| 1171 bool should_be_mono = false; | |
| 1172 | |
| 1173 #ifndef PRODUCT | |
| 1174 Atomic::inc(&_ic_miss_ctr); | |
| 1175 | |
| 1176 // Statistics & Tracing | |
| 1177 if (TraceCallFixup) { | |
| 1178 ResourceMark rm(thread); | |
| 1179 tty->print("IC miss (%s) call to", Bytecodes::name(bc)); | |
| 1180 callee_method->print_short_name(tty); | |
| 1181 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
| 1182 } | |
| 1183 | |
| 1184 if (ICMissHistogram) { | |
| 1185 MutexLocker m(VMStatistic_lock); | |
| 1186 RegisterMap reg_map(thread, false); | |
| 1187 frame f = thread->last_frame().real_sender(®_map);// skip runtime stub | |
| 1188 // produce statistics under the lock | |
| 1189 trace_ic_miss(f.pc()); | |
| 1190 } | |
| 1191 #endif | |
| 1192 | |
| 1193 // install an event collector so that when a vtable stub is created the | |
| 1194 // profiler can be notified via a DYNAMIC_CODE_GENERATED event. The | |
| 1195 // event can't be posted when the stub is created as locks are held | |
| 1196 // - instead the event will be deferred until the event collector goes | |
| 1197 // out of scope. | |
| 1198 JvmtiDynamicCodeEventCollector event_collector; | |
| 1199 | |
| 1200 // Update inline cache to megamorphic. Skip update if caller has been | |
| 1201 // made non-entrant or we are called from interpreted. | |
| 1202 { MutexLocker ml_patch (CompiledIC_lock); | |
| 1203 RegisterMap reg_map(thread, false); | |
| 1204 frame caller_frame = thread->last_frame().sender(®_map); | |
| 1205 CodeBlob* cb = caller_frame.cb(); | |
| 1206 if (cb->is_nmethod() && ((nmethod*)cb)->is_in_use()) { | |
| 1207 // Not a non-entrant nmethod, so find inline_cache | |
| 1208 CompiledIC* inline_cache = CompiledIC_before(caller_frame.pc()); | |
| 1209 bool should_be_mono = false; | |
| 1210 if (inline_cache->is_optimized()) { | |
| 1211 if (TraceCallFixup) { | |
| 1212 ResourceMark rm(thread); | |
| 1213 tty->print("OPTIMIZED IC miss (%s) call to", Bytecodes::name(bc)); | |
| 1214 callee_method->print_short_name(tty); | |
| 1215 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
| 1216 } | |
| 1217 should_be_mono = true; | |
| 1218 } else { | |
| 1219 compiledICHolderOop ic_oop = (compiledICHolderOop) inline_cache->cached_oop(); | |
| 1220 if ( ic_oop != NULL && ic_oop->is_compiledICHolder()) { | |
| 1221 | |
| 1222 if (receiver()->klass() == ic_oop->holder_klass()) { | |
| 1223 // This isn't a real miss. We must have seen that compiled code | |
| 1224 // is now available and we want the call site converted to a | |
| 1225 // monomorphic compiled call site. | |
| 1226 // We can't assert for callee_method->code() != NULL because it | |
| 1227 // could have been deoptimized in the meantime | |
| 1228 if (TraceCallFixup) { | |
| 1229 ResourceMark rm(thread); | |
| 1230 tty->print("FALSE IC miss (%s) converting to compiled call to", Bytecodes::name(bc)); | |
| 1231 callee_method->print_short_name(tty); | |
| 1232 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
| 1233 } | |
| 1234 should_be_mono = true; | |
| 1235 } | |
| 1236 } | |
| 1237 } | |
| 1238 | |
| 1239 if (should_be_mono) { | |
| 1240 | |
| 1241 // We have a path that was monomorphic but was going interpreted | |
| 1242 // and now we have (or had) a compiled entry. We correct the IC | |
| 1243 // by using a new icBuffer. | |
| 1244 CompiledICInfo info; | |
| 1245 KlassHandle receiver_klass(THREAD, receiver()->klass()); | |
| 1246 inline_cache->compute_monomorphic_entry(callee_method, | |
| 1247 receiver_klass, | |
| 1248 inline_cache->is_optimized(), | |
| 1249 false, | |
| 1250 info, CHECK_(methodHandle())); | |
| 1251 inline_cache->set_to_monomorphic(info); | |
| 1252 } else if (!inline_cache->is_megamorphic() && !inline_cache->is_clean()) { | |
| 1253 // Change to megamorphic | |
| 1254 inline_cache->set_to_megamorphic(&call_info, bc, CHECK_(methodHandle())); | |
| 1255 } else { | |
| 1256 // Either clean or megamorphic | |
| 1257 } | |
| 1258 } | |
| 1259 } // Release CompiledIC_lock | |
| 1260 | |
| 1261 return callee_method; | |
| 1262 } | |
| 1263 | |
| 1264 // | |
| 1265 // Resets a call-site in compiled code so it will get resolved again. | |
| 1266 // This routines handles both virtual call sites, optimized virtual call | |
| 1267 // sites, and static call sites. Typically used to change a call sites | |
| 1268 // destination from compiled to interpreted. | |
| 1269 // | |
| 1270 methodHandle SharedRuntime::reresolve_call_site(JavaThread *thread, TRAPS) { | |
| 1271 ResourceMark rm(thread); | |
| 1272 RegisterMap reg_map(thread, false); | |
| 1273 frame stub_frame = thread->last_frame(); | |
| 1274 assert(stub_frame.is_runtime_frame(), "must be a runtimeStub"); | |
| 1275 frame caller = stub_frame.sender(®_map); | |
| 1276 | |
| 1277 // Do nothing if the frame isn't a live compiled frame. | |
| 1278 // nmethod could be deoptimized by the time we get here | |
| 1279 // so no update to the caller is needed. | |
| 1280 | |
| 1281 if (caller.is_compiled_frame() && !caller.is_deoptimized_frame()) { | |
| 1282 | |
| 1283 address pc = caller.pc(); | |
| 1284 Events::log("update call-site at pc " INTPTR_FORMAT, pc); | |
| 1285 | |
| 1286 // Default call_addr is the location of the "basic" call. | |
| 1287 // Determine the address of the call we a reresolving. With | |
| 1288 // Inline Caches we will always find a recognizable call. | |
| 1289 // With Inline Caches disabled we may or may not find a | |
| 1290 // recognizable call. We will always find a call for static | |
| 1291 // calls and for optimized virtual calls. For vanilla virtual | |
| 1292 // calls it depends on the state of the UseInlineCaches switch. | |
| 1293 // | |
| 1294 // With Inline Caches disabled we can get here for a virtual call | |
| 1295 // for two reasons: | |
| 1296 // 1 - calling an abstract method. The vtable for abstract methods | |
| 1297 // will run us thru handle_wrong_method and we will eventually | |
| 1298 // end up in the interpreter to throw the ame. | |
| 1299 // 2 - a racing deoptimization. We could be doing a vanilla vtable | |
| 1300 // call and between the time we fetch the entry address and | |
| 1301 // we jump to it the target gets deoptimized. Similar to 1 | |
| 1302 // we will wind up in the interprter (thru a c2i with c2). | |
| 1303 // | |
| 1304 address call_addr = NULL; | |
| 1305 { | |
| 1306 // Get call instruction under lock because another thread may be | |
| 1307 // busy patching it. | |
| 1308 MutexLockerEx ml_patch(Patching_lock, Mutex::_no_safepoint_check_flag); | |
| 1309 // Location of call instruction | |
| 1310 if (NativeCall::is_call_before(pc)) { | |
| 1311 NativeCall *ncall = nativeCall_before(pc); | |
| 1312 call_addr = ncall->instruction_address(); | |
| 1313 } | |
| 1314 } | |
| 1315 | |
| 1316 // Check for static or virtual call | |
| 1317 bool is_static_call = false; | |
| 1318 nmethod* caller_nm = CodeCache::find_nmethod(pc); | |
| 1319 // Make sure nmethod doesn't get deoptimized and removed until | |
| 1320 // this is done with it. | |
| 1321 // CLEANUP - with lazy deopt shouldn't need this lock | |
| 1322 nmethodLocker nmlock(caller_nm); | |
| 1323 | |
| 1324 if (call_addr != NULL) { | |
| 1325 RelocIterator iter(caller_nm, call_addr, call_addr+1); | |
| 1326 int ret = iter.next(); // Get item | |
| 1327 if (ret) { | |
| 1328 assert(iter.addr() == call_addr, "must find call"); | |
| 1329 if (iter.type() == relocInfo::static_call_type) { | |
| 1330 is_static_call = true; | |
| 1331 } else { | |
| 1332 assert(iter.type() == relocInfo::virtual_call_type || | |
| 1333 iter.type() == relocInfo::opt_virtual_call_type | |
| 1334 , "unexpected relocInfo. type"); | |
| 1335 } | |
| 1336 } else { | |
| 1337 assert(!UseInlineCaches, "relocation info. must exist for this address"); | |
| 1338 } | |
| 1339 | |
| 1340 // Cleaning the inline cache will force a new resolve. This is more robust | |
| 1341 // than directly setting it to the new destination, since resolving of calls | |
| 1342 // is always done through the same code path. (experience shows that it | |
| 1343 // leads to very hard to track down bugs, if an inline cache gets updated | |
| 1344 // to a wrong method). It should not be performance critical, since the | |
| 1345 // resolve is only done once. | |
| 1346 | |
| 1347 MutexLocker ml(CompiledIC_lock); | |
| 1348 // | |
| 1349 // We do not patch the call site if the nmethod has been made non-entrant | |
| 1350 // as it is a waste of time | |
| 1351 // | |
| 1352 if (caller_nm->is_in_use()) { | |
| 1353 if (is_static_call) { | |
| 1354 CompiledStaticCall* ssc= compiledStaticCall_at(call_addr); | |
| 1355 ssc->set_to_clean(); | |
| 1356 } else { | |
| 1357 // compiled, dispatched call (which used to call an interpreted method) | |
| 1358 CompiledIC* inline_cache = CompiledIC_at(call_addr); | |
| 1359 inline_cache->set_to_clean(); | |
| 1360 } | |
| 1361 } | |
| 1362 } | |
| 1363 | |
| 1364 } | |
| 1365 | |
| 1366 methodHandle callee_method = find_callee_method(thread, CHECK_(methodHandle())); | |
| 1367 | |
| 1368 | |
| 1369 #ifndef PRODUCT | |
| 1370 Atomic::inc(&_wrong_method_ctr); | |
| 1371 | |
| 1372 if (TraceCallFixup) { | |
| 1373 ResourceMark rm(thread); | |
| 1374 tty->print("handle_wrong_method reresolving call to"); | |
| 1375 callee_method->print_short_name(tty); | |
| 1376 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
| 1377 } | |
| 1378 #endif | |
| 1379 | |
| 1380 return callee_method; | |
| 1381 } | |
| 1382 | |
| 1383 // --------------------------------------------------------------------------- | |
| 1384 // We are calling the interpreter via a c2i. Normally this would mean that | |
| 1385 // we were called by a compiled method. However we could have lost a race | |
| 1386 // where we went int -> i2c -> c2i and so the caller could in fact be | |
| 1205 | 1387 // interpreted. If the caller is compiled we attempt to patch the caller |
| 0 | 1388 // so he no longer calls into the interpreter. |
| 1389 IRT_LEAF(void, SharedRuntime::fixup_callers_callsite(methodOopDesc* method, address caller_pc)) | |
| 1390 methodOop moop(method); | |
| 1391 | |
| 1392 address entry_point = moop->from_compiled_entry(); | |
| 1393 | |
| 1394 // It's possible that deoptimization can occur at a call site which hasn't | |
| 1395 // been resolved yet, in which case this function will be called from | |
| 1396 // an nmethod that has been patched for deopt and we can ignore the | |
| 1397 // request for a fixup. | |
| 1398 // Also it is possible that we lost a race in that from_compiled_entry | |
| 1399 // is now back to the i2c in that case we don't need to patch and if | |
| 1400 // we did we'd leap into space because the callsite needs to use | |
| 1401 // "to interpreter" stub in order to load up the methodOop. Don't | |
| 1402 // ask me how I know this... | |
| 1403 | |
| 1404 CodeBlob* cb = CodeCache::find_blob(caller_pc); | |
| 1205 | 1405 if (!cb->is_nmethod() || entry_point == moop->get_c2i_entry()) { |
| 1406 return; | |
| 1407 } | |
| 1408 | |
| 1409 // The check above makes sure this is a nmethod. | |
| 1410 nmethod* nm = cb->as_nmethod_or_null(); | |
| 1411 assert(nm, "must be"); | |
| 1412 | |
| 1413 // Don't fixup MethodHandle call sites as c2i/i2c adapters are used | |
| 1414 // to implement MethodHandle actions. | |
| 1415 if (nm->is_method_handle_return(caller_pc)) { | |
| 0 | 1416 return; |
| 1417 } | |
| 1418 | |
| 1419 // There is a benign race here. We could be attempting to patch to a compiled | |
| 1420 // entry point at the same time the callee is being deoptimized. If that is | |
| 1421 // the case then entry_point may in fact point to a c2i and we'd patch the | |
| 1422 // call site with the same old data. clear_code will set code() to NULL | |
| 1423 // at the end of it. If we happen to see that NULL then we can skip trying | |
| 1424 // to patch. If we hit the window where the callee has a c2i in the | |
| 1425 // from_compiled_entry and the NULL isn't present yet then we lose the race | |
| 1426 // and patch the code with the same old data. Asi es la vida. | |
| 1427 | |
| 1428 if (moop->code() == NULL) return; | |
| 1429 | |
| 1205 | 1430 if (nm->is_in_use()) { |
| 0 | 1431 |
| 1432 // Expect to find a native call there (unless it was no-inline cache vtable dispatch) | |
| 1433 MutexLockerEx ml_patch(Patching_lock, Mutex::_no_safepoint_check_flag); | |
| 1434 if (NativeCall::is_call_before(caller_pc + frame::pc_return_offset)) { | |
| 1435 NativeCall *call = nativeCall_before(caller_pc + frame::pc_return_offset); | |
| 1436 // | |
| 1437 // bug 6281185. We might get here after resolving a call site to a vanilla | |
| 1438 // virtual call. Because the resolvee uses the verified entry it may then | |
| 1439 // see compiled code and attempt to patch the site by calling us. This would | |
| 1440 // then incorrectly convert the call site to optimized and its downhill from | |
| 1441 // there. If you're lucky you'll get the assert in the bugid, if not you've | |
| 1442 // just made a call site that could be megamorphic into a monomorphic site | |
| 1443 // for the rest of its life! Just another racing bug in the life of | |
| 1444 // fixup_callers_callsite ... | |
| 1445 // | |
| 1446 RelocIterator iter(cb, call->instruction_address(), call->next_instruction_address()); | |
| 1447 iter.next(); | |
| 1448 assert(iter.has_current(), "must have a reloc at java call site"); | |
| 1449 relocInfo::relocType typ = iter.reloc()->type(); | |
| 1450 if ( typ != relocInfo::static_call_type && | |
| 1451 typ != relocInfo::opt_virtual_call_type && | |
| 1452 typ != relocInfo::static_stub_type) { | |
| 1453 return; | |
| 1454 } | |
| 1455 address destination = call->destination(); | |
| 1456 if (destination != entry_point) { | |
| 1457 CodeBlob* callee = CodeCache::find_blob(destination); | |
| 1458 // callee == cb seems weird. It means calling interpreter thru stub. | |
| 1459 if (callee == cb || callee->is_adapter_blob()) { | |
| 1460 // static call or optimized virtual | |
| 1461 if (TraceCallFixup) { | |
| 1204 | 1462 tty->print("fixup callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); |
| 0 | 1463 moop->print_short_name(tty); |
| 1464 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
| 1465 } | |
| 1466 call->set_destination_mt_safe(entry_point); | |
| 1467 } else { | |
| 1468 if (TraceCallFixup) { | |
| 1469 tty->print("failed to fixup callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); | |
| 1470 moop->print_short_name(tty); | |
| 1471 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
| 1472 } | |
| 1473 // assert is too strong could also be resolve destinations. | |
| 1474 // assert(InlineCacheBuffer::contains(destination) || VtableStubs::contains(destination), "must be"); | |
| 1475 } | |
| 1476 } else { | |
| 1477 if (TraceCallFixup) { | |
| 1204 | 1478 tty->print("already patched callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); |
| 0 | 1479 moop->print_short_name(tty); |
| 1480 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
| 1481 } | |
| 1482 } | |
| 1483 } | |
| 1484 } | |
| 1485 | |
| 1486 IRT_END | |
| 1487 | |
| 1488 | |
| 1489 // same as JVM_Arraycopy, but called directly from compiled code | |
| 1490 JRT_ENTRY(void, SharedRuntime::slow_arraycopy_C(oopDesc* src, jint src_pos, | |
| 1491 oopDesc* dest, jint dest_pos, | |
| 1492 jint length, | |
| 1493 JavaThread* thread)) { | |
| 1494 #ifndef PRODUCT | |
| 1495 _slow_array_copy_ctr++; | |
| 1496 #endif | |
| 1497 // Check if we have null pointers | |
| 1498 if (src == NULL || dest == NULL) { | |
| 1499 THROW(vmSymbols::java_lang_NullPointerException()); | |
| 1500 } | |
| 1501 // Do the copy. The casts to arrayOop are necessary to the copy_array API, | |
| 1502 // even though the copy_array API also performs dynamic checks to ensure | |
| 1503 // that src and dest are truly arrays (and are conformable). | |
| 1504 // The copy_array mechanism is awkward and could be removed, but | |
| 1505 // the compilers don't call this function except as a last resort, | |
| 1506 // so it probably doesn't matter. | |
| 1507 Klass::cast(src->klass())->copy_array((arrayOopDesc*)src, src_pos, | |
| 1508 (arrayOopDesc*)dest, dest_pos, | |
| 1509 length, thread); | |
| 1510 } | |
| 1511 JRT_END | |
| 1512 | |
| 1513 char* SharedRuntime::generate_class_cast_message( | |
| 1514 JavaThread* thread, const char* objName) { | |
| 1515 | |
| 1516 // Get target class name from the checkcast instruction | |
| 1517 vframeStream vfst(thread, true); | |
| 1518 assert(!vfst.at_end(), "Java frame must exist"); | |
| 1519 Bytecode_checkcast* cc = Bytecode_checkcast_at( | |
| 1520 vfst.method()->bcp_from(vfst.bci())); | |
| 1521 Klass* targetKlass = Klass::cast(vfst.method()->constants()->klass_at( | |
| 1522 cc->index(), thread)); | |
| 1523 return generate_class_cast_message(objName, targetKlass->external_name()); | |
| 1524 } | |
| 1525 | |
| 710 | 1526 char* SharedRuntime::generate_wrong_method_type_message(JavaThread* thread, |
| 1527 oopDesc* required, | |
| 1528 oopDesc* actual) { | |
| 1529 assert(EnableMethodHandles, ""); | |
| 1530 oop singleKlass = wrong_method_type_is_for_single_argument(thread, required); | |
| 1531 if (singleKlass != NULL) { | |
| 1532 const char* objName = "argument or return value"; | |
| 1533 if (actual != NULL) { | |
| 1534 // be flexible about the junk passed in: | |
| 1535 klassOop ak = (actual->is_klass() | |
| 1536 ? (klassOop)actual | |
| 1537 : actual->klass()); | |
| 1538 objName = Klass::cast(ak)->external_name(); | |
| 1539 } | |
| 1540 Klass* targetKlass = Klass::cast(required->is_klass() | |
| 1541 ? (klassOop)required | |
| 1542 : java_lang_Class::as_klassOop(required)); | |
| 1543 return generate_class_cast_message(objName, targetKlass->external_name()); | |
| 1544 } else { | |
| 1545 // %%% need to get the MethodType string, without messing around too much | |
| 1546 // Get a signature from the invoke instruction | |
| 1547 const char* mhName = "method handle"; | |
| 1548 const char* targetType = "the required signature"; | |
| 1549 vframeStream vfst(thread, true); | |
| 1550 if (!vfst.at_end()) { | |
| 1551 Bytecode_invoke* call = Bytecode_invoke_at(vfst.method(), vfst.bci()); | |
| 1552 methodHandle target; | |
| 1553 { | |
| 1554 EXCEPTION_MARK; | |
| 1555 target = call->static_target(THREAD); | |
| 1556 if (HAS_PENDING_EXCEPTION) { CLEAR_PENDING_EXCEPTION; } | |
| 1557 } | |
| 1558 if (target.not_null() | |
| 1559 && target->is_method_handle_invoke() | |
| 1560 && required == target->method_handle_type()) { | |
| 1561 targetType = target->signature()->as_C_string(); | |
| 1562 } | |
| 1563 } | |
| 1564 klassOop kignore; int fignore; | |
| 1565 methodOop actual_method = MethodHandles::decode_method(actual, | |
| 1566 kignore, fignore); | |
| 1567 if (actual_method != NULL) { | |
| 1568 if (actual_method->name() == vmSymbols::invoke_name()) | |
| 1569 mhName = "$"; | |
| 1570 else | |
| 1571 mhName = actual_method->signature()->as_C_string(); | |
| 1572 if (mhName[0] == '$') | |
| 1573 mhName = actual_method->signature()->as_C_string(); | |
| 1574 } | |
| 1575 return generate_class_cast_message(mhName, targetType, | |
| 1576 " cannot be called as "); | |
| 1577 } | |
| 1578 } | |
| 1579 | |
| 1580 oop SharedRuntime::wrong_method_type_is_for_single_argument(JavaThread* thr, | |
| 1581 oopDesc* required) { | |
| 1582 if (required == NULL) return NULL; | |
| 1142 | 1583 if (required->klass() == SystemDictionary::Class_klass()) |
| 710 | 1584 return required; |
| 1585 if (required->is_klass()) | |
| 1586 return Klass::cast(klassOop(required))->java_mirror(); | |
| 1587 return NULL; | |
| 1588 } | |
| 1589 | |
| 1590 | |
| 0 | 1591 char* SharedRuntime::generate_class_cast_message( |
| 710 | 1592 const char* objName, const char* targetKlassName, const char* desc) { |
| 0 | 1593 size_t msglen = strlen(objName) + strlen(desc) + strlen(targetKlassName) + 1; |
| 1594 | |
| 53 | 1595 char* message = NEW_RESOURCE_ARRAY(char, msglen); |
| 0 | 1596 if (NULL == message) { |
| 53 | 1597 // Shouldn't happen, but don't cause even more problems if it does |
| 0 | 1598 message = const_cast<char*>(objName); |
| 1599 } else { | |
| 1600 jio_snprintf(message, msglen, "%s%s%s", objName, desc, targetKlassName); | |
| 1601 } | |
| 1602 return message; | |
| 1603 } | |
| 1604 | |
| 1605 JRT_LEAF(void, SharedRuntime::reguard_yellow_pages()) | |
| 1606 (void) JavaThread::current()->reguard_stack(); | |
| 1607 JRT_END | |
| 1608 | |
| 1609 | |
| 1610 // Handles the uncommon case in locking, i.e., contention or an inflated lock. | |
| 1611 #ifndef PRODUCT | |
| 1612 int SharedRuntime::_monitor_enter_ctr=0; | |
| 1613 #endif | |
| 1614 JRT_ENTRY_NO_ASYNC(void, SharedRuntime::complete_monitor_locking_C(oopDesc* _obj, BasicLock* lock, JavaThread* thread)) | |
| 1615 oop obj(_obj); | |
| 1616 #ifndef PRODUCT | |
| 1617 _monitor_enter_ctr++; // monitor enter slow | |
| 1618 #endif | |
| 1619 if (PrintBiasedLockingStatistics) { | |
| 1620 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); | |
| 1621 } | |
| 1622 Handle h_obj(THREAD, obj); | |
| 1623 if (UseBiasedLocking) { | |
| 1624 // Retry fast entry if bias is revoked to avoid unnecessary inflation | |
| 1625 ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK); | |
| 1626 } else { | |
| 1627 ObjectSynchronizer::slow_enter(h_obj, lock, CHECK); | |
| 1628 } | |
| 1629 assert(!HAS_PENDING_EXCEPTION, "Should have no exception here"); | |
| 1630 JRT_END | |
| 1631 | |
| 1632 #ifndef PRODUCT | |
| 1633 int SharedRuntime::_monitor_exit_ctr=0; | |
| 1634 #endif | |
| 1635 // Handles the uncommon cases of monitor unlocking in compiled code | |
| 1636 JRT_LEAF(void, SharedRuntime::complete_monitor_unlocking_C(oopDesc* _obj, BasicLock* lock)) | |
| 1637 oop obj(_obj); | |
| 1638 #ifndef PRODUCT | |
| 1639 _monitor_exit_ctr++; // monitor exit slow | |
| 1640 #endif | |
| 1641 Thread* THREAD = JavaThread::current(); | |
| 1642 // I'm not convinced we need the code contained by MIGHT_HAVE_PENDING anymore | |
| 1643 // testing was unable to ever fire the assert that guarded it so I have removed it. | |
| 1644 assert(!HAS_PENDING_EXCEPTION, "Do we need code below anymore?"); | |
| 1645 #undef MIGHT_HAVE_PENDING | |
| 1646 #ifdef MIGHT_HAVE_PENDING | |
| 1647 // Save and restore any pending_exception around the exception mark. | |
| 1648 // While the slow_exit must not throw an exception, we could come into | |
| 1649 // this routine with one set. | |
| 1650 oop pending_excep = NULL; | |
| 1651 const char* pending_file; | |
| 1652 int pending_line; | |
| 1653 if (HAS_PENDING_EXCEPTION) { | |
| 1654 pending_excep = PENDING_EXCEPTION; | |
| 1655 pending_file = THREAD->exception_file(); | |
| 1656 pending_line = THREAD->exception_line(); | |
| 1657 CLEAR_PENDING_EXCEPTION; | |
| 1658 } | |
| 1659 #endif /* MIGHT_HAVE_PENDING */ | |
| 1660 | |
| 1661 { | |
| 1662 // Exit must be non-blocking, and therefore no exceptions can be thrown. | |
| 1663 EXCEPTION_MARK; | |
| 1664 ObjectSynchronizer::slow_exit(obj, lock, THREAD); | |
| 1665 } | |
| 1666 | |
| 1667 #ifdef MIGHT_HAVE_PENDING | |
| 1668 if (pending_excep != NULL) { | |
| 1669 THREAD->set_pending_exception(pending_excep, pending_file, pending_line); | |
| 1670 } | |
| 1671 #endif /* MIGHT_HAVE_PENDING */ | |
| 1672 JRT_END | |
| 1673 | |
| 1674 #ifndef PRODUCT | |
| 1675 | |
| 1676 void SharedRuntime::print_statistics() { | |
| 1677 ttyLocker ttyl; | |
| 1678 if (xtty != NULL) xtty->head("statistics type='SharedRuntime'"); | |
| 1679 | |
| 1680 if (_monitor_enter_ctr ) tty->print_cr("%5d monitor enter slow", _monitor_enter_ctr); | |
| 1681 if (_monitor_exit_ctr ) tty->print_cr("%5d monitor exit slow", _monitor_exit_ctr); | |
| 1682 if (_throw_null_ctr) tty->print_cr("%5d implicit null throw", _throw_null_ctr); | |
| 1683 | |
| 1684 SharedRuntime::print_ic_miss_histogram(); | |
| 1685 | |
| 1686 if (CountRemovableExceptions) { | |
| 1687 if (_nof_removable_exceptions > 0) { | |
| 1688 Unimplemented(); // this counter is not yet incremented | |
| 1689 tty->print_cr("Removable exceptions: %d", _nof_removable_exceptions); | |
| 1690 } | |
| 1691 } | |
| 1692 | |
| 1693 // Dump the JRT_ENTRY counters | |
| 1694 if( _new_instance_ctr ) tty->print_cr("%5d new instance requires GC", _new_instance_ctr); | |
| 1695 if( _new_array_ctr ) tty->print_cr("%5d new array requires GC", _new_array_ctr); | |
| 1696 if( _multi1_ctr ) tty->print_cr("%5d multianewarray 1 dim", _multi1_ctr); | |
| 1697 if( _multi2_ctr ) tty->print_cr("%5d multianewarray 2 dim", _multi2_ctr); | |
| 1698 if( _multi3_ctr ) tty->print_cr("%5d multianewarray 3 dim", _multi3_ctr); | |
| 1699 if( _multi4_ctr ) tty->print_cr("%5d multianewarray 4 dim", _multi4_ctr); | |
| 1700 if( _multi5_ctr ) tty->print_cr("%5d multianewarray 5 dim", _multi5_ctr); | |
| 1701 | |
| 1702 tty->print_cr("%5d inline cache miss in compiled", _ic_miss_ctr ); | |
| 1703 tty->print_cr("%5d wrong method", _wrong_method_ctr ); | |
| 1704 tty->print_cr("%5d unresolved static call site", _resolve_static_ctr ); | |
| 1705 tty->print_cr("%5d unresolved virtual call site", _resolve_virtual_ctr ); | |
| 1706 tty->print_cr("%5d unresolved opt virtual call site", _resolve_opt_virtual_ctr ); | |
| 1707 | |
| 1708 if( _mon_enter_stub_ctr ) tty->print_cr("%5d monitor enter stub", _mon_enter_stub_ctr ); | |
| 1709 if( _mon_exit_stub_ctr ) tty->print_cr("%5d monitor exit stub", _mon_exit_stub_ctr ); | |
| 1710 if( _mon_enter_ctr ) tty->print_cr("%5d monitor enter slow", _mon_enter_ctr ); | |
| 1711 if( _mon_exit_ctr ) tty->print_cr("%5d monitor exit slow", _mon_exit_ctr ); | |
| 1712 if( _partial_subtype_ctr) tty->print_cr("%5d slow partial subtype", _partial_subtype_ctr ); | |
| 1713 if( _jbyte_array_copy_ctr ) tty->print_cr("%5d byte array copies", _jbyte_array_copy_ctr ); | |
| 1714 if( _jshort_array_copy_ctr ) tty->print_cr("%5d short array copies", _jshort_array_copy_ctr ); | |
| 1715 if( _jint_array_copy_ctr ) tty->print_cr("%5d int array copies", _jint_array_copy_ctr ); | |
| 1716 if( _jlong_array_copy_ctr ) tty->print_cr("%5d long array copies", _jlong_array_copy_ctr ); | |
| 1717 if( _oop_array_copy_ctr ) tty->print_cr("%5d oop array copies", _oop_array_copy_ctr ); | |
| 1718 if( _checkcast_array_copy_ctr ) tty->print_cr("%5d checkcast array copies", _checkcast_array_copy_ctr ); | |
| 1719 if( _unsafe_array_copy_ctr ) tty->print_cr("%5d unsafe array copies", _unsafe_array_copy_ctr ); | |
| 1720 if( _generic_array_copy_ctr ) tty->print_cr("%5d generic array copies", _generic_array_copy_ctr ); | |
| 1721 if( _slow_array_copy_ctr ) tty->print_cr("%5d slow array copies", _slow_array_copy_ctr ); | |
| 1722 if( _find_handler_ctr ) tty->print_cr("%5d find exception handler", _find_handler_ctr ); | |
| 1723 if( _rethrow_ctr ) tty->print_cr("%5d rethrow handler", _rethrow_ctr ); | |
| 1724 | |
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1725 AdapterHandlerLibrary::print_statistics(); |
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1726 |
| 0 | 1727 if (xtty != NULL) xtty->tail("statistics"); |
| 1728 } | |
| 1729 | |
| 1730 inline double percent(int x, int y) { | |
| 1731 return 100.0 * x / MAX2(y, 1); | |
| 1732 } | |
| 1733 | |
| 1734 class MethodArityHistogram { | |
| 1735 public: | |
| 1736 enum { MAX_ARITY = 256 }; | |
| 1737 private: | |
| 1738 static int _arity_histogram[MAX_ARITY]; // histogram of #args | |
| 1739 static int _size_histogram[MAX_ARITY]; // histogram of arg size in words | |
| 1740 static int _max_arity; // max. arity seen | |
| 1741 static int _max_size; // max. arg size seen | |
| 1742 | |
| 1743 static void add_method_to_histogram(nmethod* nm) { | |
| 1744 methodOop m = nm->method(); | |
| 1745 ArgumentCount args(m->signature()); | |
| 1746 int arity = args.size() + (m->is_static() ? 0 : 1); | |
| 1747 int argsize = m->size_of_parameters(); | |
| 1748 arity = MIN2(arity, MAX_ARITY-1); | |
| 1749 argsize = MIN2(argsize, MAX_ARITY-1); | |
| 1750 int count = nm->method()->compiled_invocation_count(); | |
| 1751 _arity_histogram[arity] += count; | |
| 1752 _size_histogram[argsize] += count; | |
| 1753 _max_arity = MAX2(_max_arity, arity); | |
| 1754 _max_size = MAX2(_max_size, argsize); | |
| 1755 } | |
| 1756 | |
| 1757 void print_histogram_helper(int n, int* histo, const char* name) { | |
| 1758 const int N = MIN2(5, n); | |
| 1759 tty->print_cr("\nHistogram of call arity (incl. rcvr, calls to compiled methods only):"); | |
| 1760 double sum = 0; | |
| 1761 double weighted_sum = 0; | |
| 1762 int i; | |
| 1763 for (i = 0; i <= n; i++) { sum += histo[i]; weighted_sum += i*histo[i]; } | |
| 1764 double rest = sum; | |
| 1765 double percent = sum / 100; | |
| 1766 for (i = 0; i <= N; i++) { | |
| 1767 rest -= histo[i]; | |
| 1768 tty->print_cr("%4d: %7d (%5.1f%%)", i, histo[i], histo[i] / percent); | |
| 1769 } | |
| 1770 tty->print_cr("rest: %7d (%5.1f%%))", (int)rest, rest / percent); | |
| 1771 tty->print_cr("(avg. %s = %3.1f, max = %d)", name, weighted_sum / sum, n); | |
| 1772 } | |
| 1773 | |
| 1774 void print_histogram() { | |
| 1775 tty->print_cr("\nHistogram of call arity (incl. rcvr, calls to compiled methods only):"); | |
| 1776 print_histogram_helper(_max_arity, _arity_histogram, "arity"); | |
| 1777 tty->print_cr("\nSame for parameter size (in words):"); | |
| 1778 print_histogram_helper(_max_size, _size_histogram, "size"); | |
| 1779 tty->cr(); | |
| 1780 } | |
| 1781 | |
| 1782 public: | |
| 1783 MethodArityHistogram() { | |
| 1784 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 1785 _max_arity = _max_size = 0; | |
| 1786 for (int i = 0; i < MAX_ARITY; i++) _arity_histogram[i] = _size_histogram [i] = 0; | |
| 1787 CodeCache::nmethods_do(add_method_to_histogram); | |
| 1788 print_histogram(); | |
| 1789 } | |
| 1790 }; | |
| 1791 | |
| 1792 int MethodArityHistogram::_arity_histogram[MethodArityHistogram::MAX_ARITY]; | |
| 1793 int MethodArityHistogram::_size_histogram[MethodArityHistogram::MAX_ARITY]; | |
| 1794 int MethodArityHistogram::_max_arity; | |
| 1795 int MethodArityHistogram::_max_size; | |
| 1796 | |
| 1797 void SharedRuntime::print_call_statistics(int comp_total) { | |
| 1798 tty->print_cr("Calls from compiled code:"); | |
| 1799 int total = _nof_normal_calls + _nof_interface_calls + _nof_static_calls; | |
| 1800 int mono_c = _nof_normal_calls - _nof_optimized_calls - _nof_megamorphic_calls; | |
| 1801 int mono_i = _nof_interface_calls - _nof_optimized_interface_calls - _nof_megamorphic_interface_calls; | |
| 1802 tty->print_cr("\t%9d (%4.1f%%) total non-inlined ", total, percent(total, total)); | |
| 1803 tty->print_cr("\t%9d (%4.1f%%) virtual calls ", _nof_normal_calls, percent(_nof_normal_calls, total)); | |
| 1804 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_calls, percent(_nof_inlined_calls, _nof_normal_calls)); | |
| 1805 tty->print_cr("\t %9d (%3.0f%%) optimized ", _nof_optimized_calls, percent(_nof_optimized_calls, _nof_normal_calls)); | |
| 1806 tty->print_cr("\t %9d (%3.0f%%) monomorphic ", mono_c, percent(mono_c, _nof_normal_calls)); | |
| 1807 tty->print_cr("\t %9d (%3.0f%%) megamorphic ", _nof_megamorphic_calls, percent(_nof_megamorphic_calls, _nof_normal_calls)); | |
| 1808 tty->print_cr("\t%9d (%4.1f%%) interface calls ", _nof_interface_calls, percent(_nof_interface_calls, total)); | |
| 1809 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_interface_calls, percent(_nof_inlined_interface_calls, _nof_interface_calls)); | |
| 1810 tty->print_cr("\t %9d (%3.0f%%) optimized ", _nof_optimized_interface_calls, percent(_nof_optimized_interface_calls, _nof_interface_calls)); | |
| 1811 tty->print_cr("\t %9d (%3.0f%%) monomorphic ", mono_i, percent(mono_i, _nof_interface_calls)); | |
| 1812 tty->print_cr("\t %9d (%3.0f%%) megamorphic ", _nof_megamorphic_interface_calls, percent(_nof_megamorphic_interface_calls, _nof_interface_calls)); | |
| 1813 tty->print_cr("\t%9d (%4.1f%%) static/special calls", _nof_static_calls, percent(_nof_static_calls, total)); | |
| 1814 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_static_calls, percent(_nof_inlined_static_calls, _nof_static_calls)); | |
| 1815 tty->cr(); | |
| 1816 tty->print_cr("Note 1: counter updates are not MT-safe."); | |
| 1817 tty->print_cr("Note 2: %% in major categories are relative to total non-inlined calls;"); | |
| 1818 tty->print_cr(" %% in nested categories are relative to their category"); | |
| 1819 tty->print_cr(" (and thus add up to more than 100%% with inlining)"); | |
| 1820 tty->cr(); | |
| 1821 | |
| 1822 MethodArityHistogram h; | |
| 1823 } | |
| 1824 #endif | |
| 1825 | |
| 1826 | |
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1827 // A simple wrapper class around the calling convention information |
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1828 // that allows sharing of adapters for the same calling convention. |
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1829 class AdapterFingerPrint : public CHeapObj { |
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1830 private: |
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1831 union { |
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1832 int _compact[3]; |
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1833 int* _fingerprint; |
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1834 } _value; |
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1835 int _length; // A negative length indicates the fingerprint is in the compact form, |
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1836 // Otherwise _value._fingerprint is the array. |
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1837 |
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1838 // Remap BasicTypes that are handled equivalently by the adapters. |
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1839 // These are correct for the current system but someday it might be |
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1840 // necessary to make this mapping platform dependent. |
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1841 static BasicType adapter_encoding(BasicType in) { |
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1842 assert((~0xf & in) == 0, "must fit in 4 bits"); |
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1843 switch(in) { |
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1844 case T_BOOLEAN: |
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1845 case T_BYTE: |
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1846 case T_SHORT: |
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1847 case T_CHAR: |
|
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1848 // There are all promoted to T_INT in the calling convention |
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|
1849 return T_INT; |
|
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|
1850 |
|
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|
1851 case T_OBJECT: |
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|
1852 case T_ARRAY: |
|
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|
1853 if (!TaggedStackInterpreter) { |
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|
1854 #ifdef _LP64 |
|
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|
1855 return T_LONG; |
|
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|
1856 #else |
|
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|
1857 return T_INT; |
|
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|
1858 #endif |
|
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|
1859 } |
|
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|
1860 return T_OBJECT; |
|
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|
1861 |
|
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|
1862 case T_INT: |
|
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|
1863 case T_LONG: |
|
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|
1864 case T_FLOAT: |
|
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|
1865 case T_DOUBLE: |
|
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|
1866 case T_VOID: |
|
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|
1867 return in; |
|
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|
1868 |
|
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|
1869 default: |
|
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|
1870 ShouldNotReachHere(); |
|
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|
1871 return T_CONFLICT; |
|
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|
1872 } |
|
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|
1873 } |
|
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|
1874 |
|
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|
1875 public: |
|
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|
1876 AdapterFingerPrint(int total_args_passed, BasicType* sig_bt) { |
|
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|
1877 // The fingerprint is based on the BasicType signature encoded |
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|
1878 // into an array of ints with four entries per int. |
|
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|
1879 int* ptr; |
|
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|
1880 int len = (total_args_passed + 3) >> 2; |
|
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1881 if (len <= (int)(sizeof(_value._compact) / sizeof(int))) { |
|
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1882 _value._compact[0] = _value._compact[1] = _value._compact[2] = 0; |
|
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|
1883 // Storing the signature encoded as signed chars hits about 98% |
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|
1884 // of the time. |
|
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|
1885 _length = -len; |
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|
1886 ptr = _value._compact; |
|
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|
1887 } else { |
|
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|
1888 _length = len; |
|
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|
1889 _value._fingerprint = NEW_C_HEAP_ARRAY(int, _length); |
|
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|
1890 ptr = _value._fingerprint; |
|
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|
1891 } |
|
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|
1892 |
|
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|
1893 // Now pack the BasicTypes with 4 per int |
|
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|
1894 int sig_index = 0; |
|
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|
1895 for (int index = 0; index < len; index++) { |
|
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|
1896 int value = 0; |
|
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|
1897 for (int byte = 0; byte < 4; byte++) { |
|
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|
1898 if (sig_index < total_args_passed) { |
|
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|
1899 value = (value << 4) | adapter_encoding(sig_bt[sig_index++]); |
|
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|
1900 } |
|
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|
1901 } |
|
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|
1902 ptr[index] = value; |
|
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|
1903 } |
|
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|
1904 } |
|
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|
1905 |
|
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|
1906 ~AdapterFingerPrint() { |
|
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|
1907 if (_length > 0) { |
|
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|
1908 FREE_C_HEAP_ARRAY(int, _value._fingerprint); |
|
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|
1909 } |
|
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|
1910 } |
|
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|
1911 |
|
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|
1912 int value(int index) { |
|
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|
1913 if (_length < 0) { |
|
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|
1914 return _value._compact[index]; |
|
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|
1915 } |
|
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|
1916 return _value._fingerprint[index]; |
|
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|
1917 } |
|
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|
1918 int length() { |
|
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|
1919 if (_length < 0) return -_length; |
|
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|
1920 return _length; |
|
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|
1921 } |
|
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|
1922 |
|
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|
1923 bool is_compact() { |
|
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|
1924 return _length <= 0; |
|
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|
1925 } |
|
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|
1926 |
|
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|
1927 unsigned int compute_hash() { |
|
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|
1928 int hash = 0; |
|
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|
1929 for (int i = 0; i < length(); i++) { |
|
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|
1930 int v = value(i); |
|
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|
1931 hash = (hash << 8) ^ v ^ (hash >> 5); |
|
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|
1932 } |
|
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|
1933 return (unsigned int)hash; |
|
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|
1934 } |
|
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|
1935 |
|
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|
1936 const char* as_string() { |
|
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|
1937 stringStream st; |
|
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|
1938 for (int i = 0; i < length(); i++) { |
|
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|
1939 st.print(PTR_FORMAT, value(i)); |
|
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|
1940 } |
|
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|
1941 return st.as_string(); |
|
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|
1942 } |
|
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|
1943 |
|
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|
1944 bool equals(AdapterFingerPrint* other) { |
|
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|
1945 if (other->_length != _length) { |
|
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|
1946 return false; |
|
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|
1947 } |
|
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|
1948 if (_length < 0) { |
|
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|
1949 return _value._compact[0] == other->_value._compact[0] && |
|
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|
1950 _value._compact[1] == other->_value._compact[1] && |
|
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|
1951 _value._compact[2] == other->_value._compact[2]; |
|
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|
1952 } else { |
|
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|
1953 for (int i = 0; i < _length; i++) { |
|
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1954 if (_value._fingerprint[i] != other->_value._fingerprint[i]) { |
|
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|
1955 return false; |
|
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|
1956 } |
|
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|
1957 } |
|
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|
1958 } |
|
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|
1959 return true; |
|
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|
1960 } |
|
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|
1961 }; |
|
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|
1962 |
|
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|
1963 |
|
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|
1964 // A hashtable mapping from AdapterFingerPrints to AdapterHandlerEntries |
|
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|
1965 class AdapterHandlerTable : public BasicHashtable { |
|
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|
1966 friend class AdapterHandlerTableIterator; |
|
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|
1967 |
|
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|
1968 private: |
|
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|
1969 |
|
1263
e7b1cc79bd25
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kvn
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1257
diff
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|
1970 #ifndef PRODUCT |
|
1187
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|
1971 static int _lookups; // number of calls to lookup |
|
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|
1972 static int _buckets; // number of buckets checked |
|
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|
1973 static int _equals; // number of buckets checked with matching hash |
|
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|
1974 static int _hits; // number of successful lookups |
|
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|
1975 static int _compact; // number of equals calls with compact signature |
|
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|
1976 #endif |
|
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|
1977 |
|
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|
1978 AdapterHandlerEntry* bucket(int i) { |
|
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|
1979 return (AdapterHandlerEntry*)BasicHashtable::bucket(i); |
|
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|
1980 } |
|
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|
1981 |
|
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|
1982 public: |
|
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|
1983 AdapterHandlerTable() |
|
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|
1984 : BasicHashtable(293, sizeof(AdapterHandlerEntry)) { } |
|
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|
1985 |
|
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|
1986 // Create a new entry suitable for insertion in the table |
|
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|
1987 AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) { |
|
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|
1988 AdapterHandlerEntry* entry = (AdapterHandlerEntry*)BasicHashtable::new_entry(fingerprint->compute_hash()); |
|
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|
1989 entry->init(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
|
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|
1990 return entry; |
|
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|
1991 } |
|
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|
1992 |
|
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|
1993 // Insert an entry into the table |
|
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|
1994 void add(AdapterHandlerEntry* entry) { |
|
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|
1995 int index = hash_to_index(entry->hash()); |
|
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|
1996 add_entry(index, entry); |
|
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|
1997 } |
|
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|
1998 |
|
1207
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1205
diff
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|
1999 void free_entry(AdapterHandlerEntry* entry) { |
|
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parents:
1205
diff
changeset
|
2000 entry->deallocate(); |
|
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never
parents:
1205
diff
changeset
|
2001 BasicHashtable::free_entry(entry); |
|
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parents:
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diff
changeset
|
2002 } |
|
74c848d437ab
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never
parents:
1205
diff
changeset
|
2003 |
|
1187
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|
2004 // Find a entry with the same fingerprint if it exists |
|
1207
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parents:
1205
diff
changeset
|
2005 AdapterHandlerEntry* lookup(int total_args_passed, BasicType* sig_bt) { |
|
1263
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|
2006 NOT_PRODUCT(_lookups++); |
|
1207
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parents:
1205
diff
changeset
|
2007 AdapterFingerPrint fp(total_args_passed, sig_bt); |
|
1187
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|
2008 unsigned int hash = fp.compute_hash(); |
|
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|
2009 int index = hash_to_index(hash); |
|
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changeset
|
2010 for (AdapterHandlerEntry* e = bucket(index); e != NULL; e = e->next()) { |
|
1263
e7b1cc79bd25
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|
2011 NOT_PRODUCT(_buckets++); |
|
1187
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|
2012 if (e->hash() == hash) { |
|
1263
e7b1cc79bd25
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diff
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|
2013 NOT_PRODUCT(_equals++); |
|
1187
cf0685d550f1
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|
2014 if (fp.equals(e->fingerprint())) { |
|
1263
e7b1cc79bd25
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diff
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|
2015 #ifndef PRODUCT |
|
1187
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changeset
|
2016 if (fp.is_compact()) _compact++; |
|
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diff
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|
2017 _hits++; |
|
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|
2018 #endif |
|
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|
2019 return e; |
|
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diff
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|
2020 } |
|
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diff
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|
2021 } |
|
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diff
changeset
|
2022 } |
|
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diff
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|
2023 return NULL; |
|
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never
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diff
changeset
|
2024 } |
|
cf0685d550f1
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diff
changeset
|
2025 |
|
1263
e7b1cc79bd25
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1257
diff
changeset
|
2026 #ifndef PRODUCT |
|
1187
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diff
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|
2027 void print_statistics() { |
|
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never
parents:
1142
diff
changeset
|
2028 ResourceMark rm; |
|
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never
parents:
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diff
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|
2029 int longest = 0; |
|
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diff
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|
2030 int empty = 0; |
|
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never
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diff
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|
2031 int total = 0; |
|
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diff
changeset
|
2032 int nonempty = 0; |
|
cf0685d550f1
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parents:
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diff
changeset
|
2033 for (int index = 0; index < table_size(); index++) { |
|
cf0685d550f1
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diff
changeset
|
2034 int count = 0; |
|
cf0685d550f1
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diff
changeset
|
2035 for (AdapterHandlerEntry* e = bucket(index); e != NULL; e = e->next()) { |
|
cf0685d550f1
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diff
changeset
|
2036 count++; |
|
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never
parents:
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diff
changeset
|
2037 } |
|
cf0685d550f1
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never
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diff
changeset
|
2038 if (count != 0) nonempty++; |
|
cf0685d550f1
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never
parents:
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diff
changeset
|
2039 if (count == 0) empty++; |
|
cf0685d550f1
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never
parents:
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diff
changeset
|
2040 if (count > longest) longest = count; |
|
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never
parents:
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diff
changeset
|
2041 total += count; |
|
cf0685d550f1
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never
parents:
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diff
changeset
|
2042 } |
|
cf0685d550f1
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never
parents:
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diff
changeset
|
2043 tty->print_cr("AdapterHandlerTable: empty %d longest %d total %d average %f", |
|
cf0685d550f1
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diff
changeset
|
2044 empty, longest, total, total / (double)nonempty); |
|
cf0685d550f1
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never
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diff
changeset
|
2045 tty->print_cr("AdapterHandlerTable: lookups %d buckets %d equals %d hits %d compact %d", |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2046 _lookups, _buckets, _equals, _hits, _compact); |
|
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
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1257
diff
changeset
|
2047 } |
|
1187
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never
parents:
1142
diff
changeset
|
2048 #endif |
|
cf0685d550f1
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never
parents:
1142
diff
changeset
|
2049 }; |
|
cf0685d550f1
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never
parents:
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diff
changeset
|
2050 |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2051 |
|
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
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1257
diff
changeset
|
2052 #ifndef PRODUCT |
|
1187
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6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2053 |
|
cf0685d550f1
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never
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diff
changeset
|
2054 int AdapterHandlerTable::_lookups; |
|
cf0685d550f1
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diff
changeset
|
2055 int AdapterHandlerTable::_buckets; |
|
cf0685d550f1
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never
parents:
1142
diff
changeset
|
2056 int AdapterHandlerTable::_equals; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2057 int AdapterHandlerTable::_hits; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2058 int AdapterHandlerTable::_compact; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2059 |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2060 class AdapterHandlerTableIterator : public StackObj { |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2061 private: |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2062 AdapterHandlerTable* _table; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2063 int _index; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2064 AdapterHandlerEntry* _current; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2065 |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2066 void scan() { |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2067 while (_index < _table->table_size()) { |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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diff
changeset
|
2068 AdapterHandlerEntry* a = _table->bucket(_index); |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2069 if (a != NULL) { |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2070 _current = a; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2071 return; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2072 } |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2073 _index++; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2074 } |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2075 } |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2076 |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2077 public: |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2078 AdapterHandlerTableIterator(AdapterHandlerTable* table): _table(table), _index(0), _current(NULL) { |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2079 scan(); |
|
cf0685d550f1
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never
parents:
1142
diff
changeset
|
2080 } |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2081 bool has_next() { |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2082 return _current != NULL; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2083 } |
|
cf0685d550f1
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never
parents:
1142
diff
changeset
|
2084 AdapterHandlerEntry* next() { |
|
cf0685d550f1
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never
parents:
1142
diff
changeset
|
2085 if (_current != NULL) { |
|
cf0685d550f1
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never
parents:
1142
diff
changeset
|
2086 AdapterHandlerEntry* result = _current; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2087 _current = _current->next(); |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2088 if (_current == NULL) scan(); |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2089 return result; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2090 } else { |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2091 return NULL; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2092 } |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2093 } |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2094 }; |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2095 #endif |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2096 |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2097 |
| 0 | 2098 // --------------------------------------------------------------------------- |
| 2099 // Implementation of AdapterHandlerLibrary | |
|
1187
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1142
diff
changeset
|
2100 AdapterHandlerTable* AdapterHandlerLibrary::_adapters = NULL; |
|
cf0685d550f1
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never
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1142
diff
changeset
|
2101 AdapterHandlerEntry* AdapterHandlerLibrary::_abstract_method_handler = NULL; |
| 0 | 2102 const int AdapterHandlerLibrary_size = 16*K; |
|
742
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
kvn
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710
diff
changeset
|
2103 BufferBlob* AdapterHandlerLibrary::_buffer = NULL; |
|
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
kvn
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diff
changeset
|
2104 |
|
45463a04ca27
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kvn
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diff
changeset
|
2105 BufferBlob* AdapterHandlerLibrary::buffer_blob() { |
|
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
kvn
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710
diff
changeset
|
2106 // Should be called only when AdapterHandlerLibrary_lock is active. |
|
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
kvn
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710
diff
changeset
|
2107 if (_buffer == NULL) // Initialize lazily |
|
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
kvn
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710
diff
changeset
|
2108 _buffer = BufferBlob::create("adapters", AdapterHandlerLibrary_size); |
|
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
kvn
parents:
710
diff
changeset
|
2109 return _buffer; |
|
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2110 } |
| 0 | 2111 |
| 2112 void AdapterHandlerLibrary::initialize() { | |
|
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2113 if (_adapters != NULL) return; |
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2114 _adapters = new AdapterHandlerTable(); |
| 0 | 2115 |
| 2116 // Create a special handler for abstract methods. Abstract methods | |
| 2117 // are never compiled so an i2c entry is somewhat meaningless, but | |
| 2118 // fill it in with something appropriate just in case. Pass handle | |
| 2119 // wrong method for the c2i transitions. | |
| 2120 address wrong_method = SharedRuntime::get_handle_wrong_method_stub(); | |
|
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2121 _abstract_method_handler = AdapterHandlerLibrary::new_entry(new AdapterFingerPrint(0, NULL), |
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2122 StubRoutines::throw_AbstractMethodError_entry(), |
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2123 wrong_method, wrong_method); |
| 0 | 2124 } |
| 2125 | |
|
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2126 AdapterHandlerEntry* AdapterHandlerLibrary::new_entry(AdapterFingerPrint* fingerprint, |
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2127 address i2c_entry, |
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2128 address c2i_entry, |
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2129 address c2i_unverified_entry) { |
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2130 return _adapters->new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
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2131 } |
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2132 |
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|
2133 AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(methodHandle method) { |
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2134 // Use customized signature handler. Need to lock around updates to |
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2135 // the AdapterHandlerTable (it is not safe for concurrent readers |
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2136 // and a single writer: this could be fixed if it becomes a |
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2137 // problem). |
| 0 | 2138 |
| 2139 // Get the address of the ic_miss handlers before we grab the | |
| 2140 // AdapterHandlerLibrary_lock. This fixes bug 6236259 which | |
| 2141 // was caused by the initialization of the stubs happening | |
| 2142 // while we held the lock and then notifying jvmti while | |
| 2143 // holding it. This just forces the initialization to be a little | |
| 2144 // earlier. | |
| 2145 address ic_miss = SharedRuntime::get_ic_miss_stub(); | |
| 2146 assert(ic_miss != NULL, "must have handler"); | |
| 2147 | |
|
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|
2148 ResourceMark rm; |
|
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|
2149 |
|
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2150 NOT_PRODUCT(int code_size); |
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2151 AdapterBlob* B = NULL; |
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2152 AdapterHandlerEntry* entry = NULL; |
|
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2153 AdapterFingerPrint* fingerprint = NULL; |
| 0 | 2154 { |
| 2155 MutexLocker mu(AdapterHandlerLibrary_lock); | |
| 2156 // make sure data structure is initialized | |
| 2157 initialize(); | |
| 2158 | |
| 2159 if (method->is_abstract()) { | |
|
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2160 return _abstract_method_handler; |
| 0 | 2161 } |
| 2162 | |
|
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2163 // Fill in the signature array, for the calling-convention call. |
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2164 int total_args_passed = method->size_of_parameters(); // All args on stack |
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2165 |
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|
2166 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed); |
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2167 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed); |
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2168 int i = 0; |
|
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|
2169 if (!method->is_static()) // Pass in receiver first |
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|
2170 sig_bt[i++] = T_OBJECT; |
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2171 for (SignatureStream ss(method->signature()); !ss.at_return_type(); ss.next()) { |
|
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2172 sig_bt[i++] = ss.type(); // Collect remaining bits of signature |
|
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2173 if (ss.type() == T_LONG || ss.type() == T_DOUBLE) |
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|
2174 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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2175 } |
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2176 assert(i == total_args_passed, ""); |
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2177 |
|
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2178 // Lookup method signature's fingerprint |
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2179 entry = _adapters->lookup(total_args_passed, sig_bt); |
|
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2180 |
|
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|
2181 #ifdef ASSERT |
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|
2182 AdapterHandlerEntry* shared_entry = NULL; |
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2183 if (VerifyAdapterSharing && entry != NULL) { |
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|
2184 shared_entry = entry; |
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|
2185 entry = NULL; |
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|
2186 } |
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|
2187 #endif |
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2188 |
|
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2189 if (entry != NULL) { |
|
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|
2190 return entry; |
| 0 | 2191 } |
| 2192 | |
|
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2193 // Get a description of the compiled java calling convention and the largest used (VMReg) stack slot usage |
|
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2194 int comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed, false); |
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2195 |
|
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2196 // Make a C heap allocated version of the fingerprint to store in the adapter |
|
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2197 fingerprint = new AdapterFingerPrint(total_args_passed, sig_bt); |
|
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2198 |
| 0 | 2199 // Create I2C & C2I handlers |
| 2200 | |
|
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2201 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
|
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2202 if (buf != NULL) { |
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2203 CodeBuffer buffer(buf->instructions_begin(), buf->instructions_size()); |
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|
2204 short buffer_locs[20]; |
|
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|
2205 buffer.insts()->initialize_shared_locs((relocInfo*)buffer_locs, |
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2206 sizeof(buffer_locs)/sizeof(relocInfo)); |
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2207 MacroAssembler _masm(&buffer); |
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2208 |
|
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2209 entry = SharedRuntime::generate_i2c2i_adapters(&_masm, |
|
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|
2210 total_args_passed, |
|
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|
2211 comp_args_on_stack, |
|
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|
2212 sig_bt, |
|
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2213 regs, |
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|
2214 fingerprint); |
| 0 | 2215 |
|
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|
2216 #ifdef ASSERT |
|
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|
2217 if (VerifyAdapterSharing) { |
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2218 if (shared_entry != NULL) { |
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|
2219 assert(shared_entry->compare_code(buf->instructions_begin(), buffer.code_size(), total_args_passed, sig_bt), |
|
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|
2220 "code must match"); |
|
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|
2221 // Release the one just created and return the original |
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|
2222 _adapters->free_entry(entry); |
|
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|
2223 return shared_entry; |
|
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|
2224 } else { |
|
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|
2225 entry->save_code(buf->instructions_begin(), buffer.code_size(), total_args_passed, sig_bt); |
|
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|
2226 } |
|
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|
2227 } |
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|
2228 #endif |
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2229 |
|
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2230 B = AdapterBlob::create(&buffer); |
|
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2231 NOT_PRODUCT(code_size = buffer.code_size()); |
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2232 } |
| 28 | 2233 if (B == NULL) { |
| 2234 // CodeCache is full, disable compilation | |
| 2235 // Ought to log this but compile log is only per compile thread | |
| 2236 // and we're some non descript Java thread. | |
| 1202 | 2237 MutexUnlocker mu(AdapterHandlerLibrary_lock); |
| 2238 CompileBroker::handle_full_code_cache(); | |
|
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2239 return NULL; // Out of CodeCache space |
| 28 | 2240 } |
| 0 | 2241 entry->relocate(B->instructions_begin()); |
| 2242 #ifndef PRODUCT | |
| 2243 // debugging suppport | |
| 2244 if (PrintAdapterHandlers) { | |
| 2245 tty->cr(); | |
|
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2246 tty->print_cr("i2c argument handler #%d for: %s %s (fingerprint = %s, %d bytes generated)", |
|
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2247 _adapters->number_of_entries(), (method->is_static() ? "static" : "receiver"), |
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|
2248 method->signature()->as_C_string(), fingerprint->as_string(), code_size ); |
| 0 | 2249 tty->print_cr("c2i argument handler starts at %p",entry->get_c2i_entry()); |
|
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2250 Disassembler::decode(entry->get_i2c_entry(), entry->get_i2c_entry() + code_size); |
| 0 | 2251 } |
| 2252 #endif | |
| 2253 | |
|
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|
2254 _adapters->add(entry); |
| 0 | 2255 } |
| 2256 // Outside of the lock | |
| 2257 if (B != NULL) { | |
| 2258 char blob_id[256]; | |
| 2259 jio_snprintf(blob_id, | |
| 2260 sizeof(blob_id), | |
|
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2261 "%s(%s)@" PTR_FORMAT, |
|
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2262 B->name(), |
|
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|
2263 fingerprint->as_string(), |
| 0 | 2264 B->instructions_begin()); |
| 2265 VTune::register_stub(blob_id, B->instructions_begin(), B->instructions_end()); | |
| 2266 Forte::register_stub(blob_id, B->instructions_begin(), B->instructions_end()); | |
| 2267 | |
| 2268 if (JvmtiExport::should_post_dynamic_code_generated()) { | |
| 2269 JvmtiExport::post_dynamic_code_generated(blob_id, | |
| 2270 B->instructions_begin(), | |
| 2271 B->instructions_end()); | |
| 2272 } | |
| 2273 } | |
|
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|
2274 return entry; |
| 0 | 2275 } |
| 2276 | |
| 2277 void AdapterHandlerEntry::relocate(address new_base) { | |
| 2278 ptrdiff_t delta = new_base - _i2c_entry; | |
| 2279 _i2c_entry += delta; | |
| 2280 _c2i_entry += delta; | |
| 2281 _c2i_unverified_entry += delta; | |
| 2282 } | |
| 2283 | |
|
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2284 |
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2285 void AdapterHandlerEntry::deallocate() { |
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2286 delete _fingerprint; |
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|
2287 #ifdef ASSERT |
|
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|
2288 if (_saved_code) FREE_C_HEAP_ARRAY(unsigned char, _saved_code); |
|
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|
2289 if (_saved_sig) FREE_C_HEAP_ARRAY(Basictype, _saved_sig); |
|
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|
2290 #endif |
|
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|
2291 } |
|
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|
2292 |
|
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|
2293 |
|
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diff
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|
2294 #ifdef ASSERT |
|
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|
2295 // Capture the code before relocation so that it can be compared |
|
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|
2296 // against other versions. If the code is captured after relocation |
|
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|
2297 // then relative instructions won't be equivalent. |
|
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|
2298 void AdapterHandlerEntry::save_code(unsigned char* buffer, int length, int total_args_passed, BasicType* sig_bt) { |
|
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|
2299 _saved_code = NEW_C_HEAP_ARRAY(unsigned char, length); |
|
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|
2300 _code_length = length; |
|
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|
2301 memcpy(_saved_code, buffer, length); |
|
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|
2302 _total_args_passed = total_args_passed; |
|
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|
2303 _saved_sig = NEW_C_HEAP_ARRAY(BasicType, _total_args_passed); |
|
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|
2304 memcpy(_saved_sig, sig_bt, _total_args_passed * sizeof(BasicType)); |
|
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|
2305 } |
|
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|
2306 |
|
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|
2307 |
|
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|
2308 bool AdapterHandlerEntry::compare_code(unsigned char* buffer, int length, int total_args_passed, BasicType* sig_bt) { |
|
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|
2309 if (length != _code_length) { |
|
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|
2310 return false; |
|
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|
2311 } |
|
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|
2312 for (int i = 0; i < length; i++) { |
|
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|
2313 if (buffer[i] != _saved_code[i]) { |
|
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|
2314 return false; |
|
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|
2315 } |
|
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|
2316 } |
|
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|
2317 return true; |
|
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|
2318 } |
|
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|
2319 #endif |
|
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|
2320 |
|
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|
2321 |
| 0 | 2322 // Create a native wrapper for this native method. The wrapper converts the |
| 2323 // java compiled calling convention to the native convention, handlizes | |
| 2324 // arguments, and transitions to native. On return from the native we transition | |
| 2325 // back to java blocking if a safepoint is in progress. | |
| 2326 nmethod *AdapterHandlerLibrary::create_native_wrapper(methodHandle method) { | |
| 2327 ResourceMark rm; | |
| 2328 nmethod* nm = NULL; | |
| 2329 | |
| 2330 if (PrintCompilation) { | |
| 2331 ttyLocker ttyl; | |
| 2332 tty->print("--- n%s ", (method->is_synchronized() ? "s" : " ")); | |
| 2333 method->print_short_name(tty); | |
| 2334 if (method->is_static()) { | |
| 2335 tty->print(" (static)"); | |
| 2336 } | |
| 2337 tty->cr(); | |
| 2338 } | |
| 2339 | |
| 2340 assert(method->has_native_function(), "must have something valid to call!"); | |
| 2341 | |
| 2342 { | |
| 2343 // perform the work while holding the lock, but perform any printing outside the lock | |
| 2344 MutexLocker mu(AdapterHandlerLibrary_lock); | |
| 2345 // See if somebody beat us to it | |
| 2346 nm = method->code(); | |
| 2347 if (nm) { | |
| 2348 return nm; | |
| 2349 } | |
| 2350 | |
|
742
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|
2351 ResourceMark rm; |
| 0 | 2352 |
|
742
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|
2353 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
|
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|
2354 if (buf != NULL) { |
|
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|
2355 CodeBuffer buffer(buf->instructions_begin(), buf->instructions_size()); |
|
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|
2356 double locs_buf[20]; |
|
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|
2357 buffer.insts()->initialize_shared_locs((relocInfo*)locs_buf, sizeof(locs_buf) / sizeof(relocInfo)); |
|
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2358 MacroAssembler _masm(&buffer); |
|
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|
2359 |
|
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|
2360 // Fill in the signature array, for the calling-convention call. |
|
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|
2361 int total_args_passed = method->size_of_parameters(); |
| 0 | 2362 |
|
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2363 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType,total_args_passed); |
|
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2364 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair,total_args_passed); |
|
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|
2365 int i=0; |
|
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|
2366 if( !method->is_static() ) // Pass in receiver first |
|
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|
2367 sig_bt[i++] = T_OBJECT; |
|
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|
2368 SignatureStream ss(method->signature()); |
|
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|
2369 for( ; !ss.at_return_type(); ss.next()) { |
|
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|
2370 sig_bt[i++] = ss.type(); // Collect remaining bits of signature |
|
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2371 if( ss.type() == T_LONG || ss.type() == T_DOUBLE ) |
|
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|
2372 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
|
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|
2373 } |
|
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|
2374 assert( i==total_args_passed, "" ); |
|
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|
2375 BasicType ret_type = ss.type(); |
|
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|
2376 |
|
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|
2377 // Now get the compiled-Java layout as input arguments |
|
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|
2378 int comp_args_on_stack; |
|
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|
2379 comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed, false); |
|
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|
2380 |
|
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|
2381 // Generate the compiled-to-native wrapper code |
|
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|
2382 nm = SharedRuntime::generate_native_wrapper(&_masm, |
|
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|
2383 method, |
|
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|
2384 total_args_passed, |
|
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|
2385 comp_args_on_stack, |
|
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|
2386 sig_bt,regs, |
|
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|
2387 ret_type); |
| 0 | 2388 } |
| 2389 } | |
| 2390 | |
| 2391 // Must unlock before calling set_code | |
| 2392 // Install the generated code. | |
| 2393 if (nm != NULL) { | |
| 2394 method->set_code(method, nm); | |
| 2395 nm->post_compiled_method_load_event(); | |
| 2396 } else { | |
| 2397 // CodeCache is full, disable compilation | |
| 2398 // Ought to log this but compile log is only per compile thread | |
| 2399 // and we're some non descript Java thread. | |
| 1202 | 2400 MutexUnlocker mu(AdapterHandlerLibrary_lock); |
| 2401 CompileBroker::handle_full_code_cache(); | |
| 0 | 2402 } |
| 2403 return nm; | |
| 2404 } | |
| 2405 | |
|
116
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|
2406 #ifdef HAVE_DTRACE_H |
|
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|
2407 // Create a dtrace nmethod for this method. The wrapper converts the |
|
018d5b58dd4f
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|
2408 // java compiled calling convention to the native convention, makes a dummy call |
|
018d5b58dd4f
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|
2409 // (actually nops for the size of the call instruction, which become a trap if |
|
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|
2410 // probe is enabled). The returns to the caller. Since this all looks like a |
|
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|
2411 // leaf no thread transition is needed. |
|
018d5b58dd4f
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|
2412 |
|
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|
2413 nmethod *AdapterHandlerLibrary::create_dtrace_nmethod(methodHandle method) { |
|
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|
2414 ResourceMark rm; |
|
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|
2415 nmethod* nm = NULL; |
|
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|
2416 |
|
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|
2417 if (PrintCompilation) { |
|
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|
2418 ttyLocker ttyl; |
|
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|
2419 tty->print("--- n%s "); |
|
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|
2420 method->print_short_name(tty); |
|
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|
2421 if (method->is_static()) { |
|
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|
2422 tty->print(" (static)"); |
|
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|
2423 } |
|
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|
2424 tty->cr(); |
|
018d5b58dd4f
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|
2425 } |
|
018d5b58dd4f
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|
2426 |
|
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|
2427 { |
|
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|
2428 // perform the work while holding the lock, but perform any printing |
|
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|
2429 // outside the lock |
|
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|
2430 MutexLocker mu(AdapterHandlerLibrary_lock); |
|
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|
2431 // See if somebody beat us to it |
|
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|
2432 nm = method->code(); |
|
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|
2433 if (nm) { |
|
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|
2434 return nm; |
|
018d5b58dd4f
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|
2435 } |
|
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|
2436 |
|
742
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|
2437 ResourceMark rm; |
|
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|
2438 |
|
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|
2439 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
|
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|
2440 if (buf != NULL) { |
|
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|
2441 CodeBuffer buffer(buf->instructions_begin(), buf->instructions_size()); |
|
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|
2442 // Need a few relocation entries |
|
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|
2443 double locs_buf[20]; |
|
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|
2444 buffer.insts()->initialize_shared_locs( |
|
116
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|
2445 (relocInfo*)locs_buf, sizeof(locs_buf) / sizeof(relocInfo)); |
|
742
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|
2446 MacroAssembler _masm(&buffer); |
|
116
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|
2447 |
|
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|
2448 // Generate the compiled-to-native wrapper code |
|
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|
2449 nm = SharedRuntime::generate_dtrace_nmethod(&_masm, method); |
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2450 } |
|
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2451 } |
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2452 return nm; |
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2453 } |
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2454 |
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2455 // the dtrace method needs to convert java lang string to utf8 string. |
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2456 void SharedRuntime::get_utf(oopDesc* src, address dst) { |
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2457 typeArrayOop jlsValue = java_lang_String::value(src); |
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2458 int jlsOffset = java_lang_String::offset(src); |
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2459 int jlsLen = java_lang_String::length(src); |
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2460 jchar* jlsPos = (jlsLen == 0) ? NULL : |
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2461 jlsValue->char_at_addr(jlsOffset); |
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2462 (void) UNICODE::as_utf8(jlsPos, jlsLen, (char *)dst, max_dtrace_string_size); |
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2463 } |
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2464 #endif // ndef HAVE_DTRACE_H |
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2465 |
| 0 | 2466 // ------------------------------------------------------------------------- |
| 2467 // Java-Java calling convention | |
| 2468 // (what you use when Java calls Java) | |
| 2469 | |
| 2470 //------------------------------name_for_receiver---------------------------------- | |
| 2471 // For a given signature, return the VMReg for parameter 0. | |
| 2472 VMReg SharedRuntime::name_for_receiver() { | |
| 2473 VMRegPair regs; | |
| 2474 BasicType sig_bt = T_OBJECT; | |
| 2475 (void) java_calling_convention(&sig_bt, ®s, 1, true); | |
| 2476 // Return argument 0 register. In the LP64 build pointers | |
| 2477 // take 2 registers, but the VM wants only the 'main' name. | |
| 2478 return regs.first(); | |
| 2479 } | |
| 2480 | |
|
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2481 VMRegPair *SharedRuntime::find_callee_arguments(symbolOop sig, bool has_receiver, int* arg_size) { |
| 0 | 2482 // This method is returning a data structure allocating as a |
| 2483 // ResourceObject, so do not put any ResourceMarks in here. | |
| 2484 char *s = sig->as_C_string(); | |
| 2485 int len = (int)strlen(s); | |
| 2486 *s++; len--; // Skip opening paren | |
| 2487 char *t = s+len; | |
| 2488 while( *(--t) != ')' ) ; // Find close paren | |
| 2489 | |
| 2490 BasicType *sig_bt = NEW_RESOURCE_ARRAY( BasicType, 256 ); | |
| 2491 VMRegPair *regs = NEW_RESOURCE_ARRAY( VMRegPair, 256 ); | |
| 2492 int cnt = 0; | |
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2493 if (has_receiver) { |
| 0 | 2494 sig_bt[cnt++] = T_OBJECT; // Receiver is argument 0; not in signature |
| 2495 } | |
| 2496 | |
| 2497 while( s < t ) { | |
| 2498 switch( *s++ ) { // Switch on signature character | |
| 2499 case 'B': sig_bt[cnt++] = T_BYTE; break; | |
| 2500 case 'C': sig_bt[cnt++] = T_CHAR; break; | |
| 2501 case 'D': sig_bt[cnt++] = T_DOUBLE; sig_bt[cnt++] = T_VOID; break; | |
| 2502 case 'F': sig_bt[cnt++] = T_FLOAT; break; | |
| 2503 case 'I': sig_bt[cnt++] = T_INT; break; | |
| 2504 case 'J': sig_bt[cnt++] = T_LONG; sig_bt[cnt++] = T_VOID; break; | |
| 2505 case 'S': sig_bt[cnt++] = T_SHORT; break; | |
| 2506 case 'Z': sig_bt[cnt++] = T_BOOLEAN; break; | |
| 2507 case 'V': sig_bt[cnt++] = T_VOID; break; | |
| 2508 case 'L': // Oop | |
| 2509 while( *s++ != ';' ) ; // Skip signature | |
| 2510 sig_bt[cnt++] = T_OBJECT; | |
| 2511 break; | |
| 2512 case '[': { // Array | |
| 2513 do { // Skip optional size | |
| 2514 while( *s >= '0' && *s <= '9' ) s++; | |
| 2515 } while( *s++ == '[' ); // Nested arrays? | |
| 2516 // Skip element type | |
| 2517 if( s[-1] == 'L' ) | |
| 2518 while( *s++ != ';' ) ; // Skip signature | |
| 2519 sig_bt[cnt++] = T_ARRAY; | |
| 2520 break; | |
| 2521 } | |
| 2522 default : ShouldNotReachHere(); | |
| 2523 } | |
| 2524 } | |
| 2525 assert( cnt < 256, "grow table size" ); | |
| 2526 | |
| 2527 int comp_args_on_stack; | |
| 2528 comp_args_on_stack = java_calling_convention(sig_bt, regs, cnt, true); | |
| 2529 | |
| 2530 // the calling convention doesn't count out_preserve_stack_slots so | |
| 2531 // we must add that in to get "true" stack offsets. | |
| 2532 | |
| 2533 if (comp_args_on_stack) { | |
| 2534 for (int i = 0; i < cnt; i++) { | |
| 2535 VMReg reg1 = regs[i].first(); | |
| 2536 if( reg1->is_stack()) { | |
| 2537 // Yuck | |
| 2538 reg1 = reg1->bias(out_preserve_stack_slots()); | |
| 2539 } | |
| 2540 VMReg reg2 = regs[i].second(); | |
| 2541 if( reg2->is_stack()) { | |
| 2542 // Yuck | |
| 2543 reg2 = reg2->bias(out_preserve_stack_slots()); | |
| 2544 } | |
| 2545 regs[i].set_pair(reg2, reg1); | |
| 2546 } | |
| 2547 } | |
| 2548 | |
| 2549 // results | |
| 2550 *arg_size = cnt; | |
| 2551 return regs; | |
| 2552 } | |
| 2553 | |
| 2554 // OSR Migration Code | |
| 2555 // | |
| 2556 // This code is used convert interpreter frames into compiled frames. It is | |
| 2557 // called from very start of a compiled OSR nmethod. A temp array is | |
| 2558 // allocated to hold the interesting bits of the interpreter frame. All | |
| 2559 // active locks are inflated to allow them to move. The displaced headers and | |
| 2560 // active interpeter locals are copied into the temp buffer. Then we return | |
| 2561 // back to the compiled code. The compiled code then pops the current | |
| 2562 // interpreter frame off the stack and pushes a new compiled frame. Then it | |
| 2563 // copies the interpreter locals and displaced headers where it wants. | |
| 2564 // Finally it calls back to free the temp buffer. | |
| 2565 // | |
| 2566 // All of this is done NOT at any Safepoint, nor is any safepoint or GC allowed. | |
| 2567 | |
| 2568 JRT_LEAF(intptr_t*, SharedRuntime::OSR_migration_begin( JavaThread *thread) ) | |
| 2569 | |
| 2570 #ifdef IA64 | |
| 2571 ShouldNotReachHere(); // NYI | |
| 2572 #endif /* IA64 */ | |
| 2573 | |
| 2574 // | |
| 2575 // This code is dependent on the memory layout of the interpreter local | |
| 2576 // array and the monitors. On all of our platforms the layout is identical | |
| 2577 // so this code is shared. If some platform lays the their arrays out | |
| 2578 // differently then this code could move to platform specific code or | |
| 2579 // the code here could be modified to copy items one at a time using | |
| 2580 // frame accessor methods and be platform independent. | |
| 2581 | |
| 2582 frame fr = thread->last_frame(); | |
| 2583 assert( fr.is_interpreted_frame(), "" ); | |
| 2584 assert( fr.interpreter_frame_expression_stack_size()==0, "only handle empty stacks" ); | |
| 2585 | |
| 2586 // Figure out how many monitors are active. | |
| 2587 int active_monitor_count = 0; | |
| 2588 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); | |
| 2589 kptr < fr.interpreter_frame_monitor_begin(); | |
| 2590 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { | |
| 2591 if( kptr->obj() != NULL ) active_monitor_count++; | |
| 2592 } | |
| 2593 | |
| 2594 // QQQ we could place number of active monitors in the array so that compiled code | |
| 2595 // could double check it. | |
| 2596 | |
| 2597 methodOop moop = fr.interpreter_frame_method(); | |
| 2598 int max_locals = moop->max_locals(); | |
| 2599 // Allocate temp buffer, 1 word per local & 2 per active monitor | |
| 2600 int buf_size_words = max_locals + active_monitor_count*2; | |
| 2601 intptr_t *buf = NEW_C_HEAP_ARRAY(intptr_t,buf_size_words); | |
| 2602 | |
| 2603 // Copy the locals. Order is preserved so that loading of longs works. | |
| 2604 // Since there's no GC I can copy the oops blindly. | |
| 2605 assert( sizeof(HeapWord)==sizeof(intptr_t), "fix this code"); | |
| 2606 if (TaggedStackInterpreter) { | |
| 2607 for (int i = 0; i < max_locals; i++) { | |
| 2608 // copy only each local separately to the buffer avoiding the tag | |
| 2609 buf[i] = *fr.interpreter_frame_local_at(max_locals-i-1); | |
| 2610 } | |
| 2611 } else { | |
| 2612 Copy::disjoint_words( | |
| 2613 (HeapWord*)fr.interpreter_frame_local_at(max_locals-1), | |
| 2614 (HeapWord*)&buf[0], | |
| 2615 max_locals); | |
| 2616 } | |
| 2617 | |
| 2618 // Inflate locks. Copy the displaced headers. Be careful, there can be holes. | |
| 2619 int i = max_locals; | |
| 2620 for( BasicObjectLock *kptr2 = fr.interpreter_frame_monitor_end(); | |
| 2621 kptr2 < fr.interpreter_frame_monitor_begin(); | |
| 2622 kptr2 = fr.next_monitor_in_interpreter_frame(kptr2) ) { | |
| 2623 if( kptr2->obj() != NULL) { // Avoid 'holes' in the monitor array | |
| 2624 BasicLock *lock = kptr2->lock(); | |
| 2625 // Inflate so the displaced header becomes position-independent | |
| 2626 if (lock->displaced_header()->is_unlocked()) | |
| 2627 ObjectSynchronizer::inflate_helper(kptr2->obj()); | |
| 2628 // Now the displaced header is free to move | |
| 2629 buf[i++] = (intptr_t)lock->displaced_header(); | |
| 2630 buf[i++] = (intptr_t)kptr2->obj(); | |
| 2631 } | |
| 2632 } | |
| 2633 assert( i - max_locals == active_monitor_count*2, "found the expected number of monitors" ); | |
| 2634 | |
| 2635 return buf; | |
| 2636 JRT_END | |
| 2637 | |
| 2638 JRT_LEAF(void, SharedRuntime::OSR_migration_end( intptr_t* buf) ) | |
| 2639 FREE_C_HEAP_ARRAY(intptr_t,buf); | |
| 2640 JRT_END | |
| 2641 | |
| 2642 #ifndef PRODUCT | |
| 2643 bool AdapterHandlerLibrary::contains(CodeBlob* b) { | |
|
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2644 AdapterHandlerTableIterator iter(_adapters); |
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2645 while (iter.has_next()) { |
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2646 AdapterHandlerEntry* a = iter.next(); |
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2647 if ( b == CodeCache::find_blob(a->get_i2c_entry()) ) return true; |
| 0 | 2648 } |
| 2649 return false; | |
| 2650 } | |
| 2651 | |
| 2652 void AdapterHandlerLibrary::print_handler(CodeBlob* b) { | |
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2653 AdapterHandlerTableIterator iter(_adapters); |
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2654 while (iter.has_next()) { |
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2655 AdapterHandlerEntry* a = iter.next(); |
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2656 if ( b == CodeCache::find_blob(a->get_i2c_entry()) ) { |
| 0 | 2657 tty->print("Adapter for signature: "); |
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2658 tty->print_cr("%s i2c: " INTPTR_FORMAT " c2i: " INTPTR_FORMAT " c2iUV: " INTPTR_FORMAT, |
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2659 a->fingerprint()->as_string(), |
| 0 | 2660 a->get_i2c_entry(), a->get_c2i_entry(), a->get_c2i_unverified_entry()); |
| 2661 return; | |
| 2662 } | |
| 2663 } | |
| 2664 assert(false, "Should have found handler"); | |
| 2665 } | |
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2666 |
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2667 void AdapterHandlerLibrary::print_statistics() { |
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2668 _adapters->print_statistics(); |
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2669 } |
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2670 |
| 0 | 2671 #endif /* PRODUCT */ |