Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/interfaceSupport.cpp @ 20527:8cb56c8cb30d
Merge
| author | jiangli |
|---|---|
| date | Mon, 15 Sep 2014 16:39:00 -0400 |
| parents | ce8f6bb717c9 |
| children | 4e4ebe50c8e3 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "gc_implementation/shared/markSweep.hpp" | |
| 27 #include "gc_interface/collectedHeap.hpp" | |
| 28 #include "gc_interface/collectedHeap.inline.hpp" | |
| 29 #include "memory/genCollectedHeap.hpp" | |
| 30 #include "memory/resourceArea.hpp" | |
| 31 #include "runtime/init.hpp" | |
| 32 #include "runtime/interfaceSupport.hpp" | |
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33 #include "runtime/orderAccess.inline.hpp" |
| 1972 | 34 #include "runtime/threadLocalStorage.hpp" |
| 35 #include "runtime/vframe.hpp" | |
| 36 #include "utilities/preserveException.hpp" | |
| 0 | 37 |
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38 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
| 0 | 39 |
| 40 // Implementation of InterfaceSupport | |
| 41 | |
| 42 #ifdef ASSERT | |
| 43 | |
| 44 long InterfaceSupport::_number_of_calls = 0; | |
| 45 long InterfaceSupport::_scavenge_alot_counter = 1; | |
| 46 long InterfaceSupport::_fullgc_alot_counter = 1; | |
| 47 long InterfaceSupport::_fullgc_alot_invocation = 0; | |
| 48 | |
| 49 Histogram* RuntimeHistogram; | |
| 50 | |
| 51 RuntimeHistogramElement::RuntimeHistogramElement(const char* elementName) { | |
| 52 static volatile jint RuntimeHistogram_lock = 0; | |
| 53 _name = elementName; | |
| 54 uintx count = 0; | |
| 55 | |
| 56 while (Atomic::cmpxchg(1, &RuntimeHistogram_lock, 0) != 0) { | |
| 57 while (OrderAccess::load_acquire(&RuntimeHistogram_lock) != 0) { | |
| 58 count +=1; | |
| 59 if ( (WarnOnStalledSpinLock > 0) | |
| 60 && (count % WarnOnStalledSpinLock == 0)) { | |
| 61 warning("RuntimeHistogram_lock seems to be stalled"); | |
| 62 } | |
| 63 } | |
| 64 } | |
| 65 | |
| 66 if (RuntimeHistogram == NULL) { | |
| 67 RuntimeHistogram = new Histogram("VM Runtime Call Counts",200); | |
| 68 } | |
| 69 | |
| 70 RuntimeHistogram->add_element(this); | |
| 71 Atomic::dec(&RuntimeHistogram_lock); | |
| 72 } | |
| 73 | |
| 74 void InterfaceSupport::trace(const char* result_type, const char* header) { | |
| 75 tty->print_cr("%6d %s", _number_of_calls, header); | |
| 76 } | |
| 77 | |
| 78 void InterfaceSupport::gc_alot() { | |
| 79 Thread *thread = Thread::current(); | |
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80 if (!thread->is_Java_thread()) return; // Avoid concurrent calls |
| 0 | 81 // Check for new, not quite initialized thread. A thread in new mode cannot initiate a GC. |
| 82 JavaThread *current_thread = (JavaThread *)thread; | |
| 83 if (current_thread->active_handles() == NULL) return; | |
| 84 | |
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85 // Short-circuit any possible re-entrant gc-a-lot attempt |
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86 if (thread->skip_gcalot()) return; |
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87 |
| 0 | 88 if (is_init_completed()) { |
| 89 | |
| 90 if (++_fullgc_alot_invocation < FullGCALotStart) { | |
| 91 return; | |
| 92 } | |
| 93 | |
| 94 // Use this line if you want to block at a specific point, | |
| 95 // e.g. one number_of_calls/scavenge/gc before you got into problems | |
| 96 if (FullGCALot) _fullgc_alot_counter--; | |
| 97 | |
| 98 // Check if we should force a full gc | |
| 99 if (_fullgc_alot_counter == 0) { | |
| 100 // Release dummy so objects are forced to move | |
| 101 if (!Universe::release_fullgc_alot_dummy()) { | |
| 102 warning("FullGCALot: Unable to release more dummies at bottom of heap"); | |
| 103 } | |
| 104 HandleMark hm(thread); | |
| 105 Universe::heap()->collect(GCCause::_full_gc_alot); | |
| 106 unsigned int invocations = Universe::heap()->total_full_collections(); | |
| 107 // Compute new interval | |
| 108 if (FullGCALotInterval > 1) { | |
| 109 _fullgc_alot_counter = 1+(long)((double)FullGCALotInterval*os::random()/(max_jint+1.0)); | |
| 110 if (PrintGCDetails && Verbose) { | |
| 111 tty->print_cr("Full gc no: %u\tInterval: %d", invocations, | |
| 112 _fullgc_alot_counter); | |
| 113 } | |
| 114 } else { | |
| 115 _fullgc_alot_counter = 1; | |
| 116 } | |
| 117 // Print progress message | |
| 118 if (invocations % 100 == 0) { | |
| 119 if (PrintGCDetails && Verbose) tty->print_cr("Full gc no: %u", invocations); | |
| 120 } | |
| 121 } else { | |
| 122 if (ScavengeALot) _scavenge_alot_counter--; | |
| 123 // Check if we should force a scavenge | |
| 124 if (_scavenge_alot_counter == 0) { | |
| 125 HandleMark hm(thread); | |
| 126 Universe::heap()->collect(GCCause::_scavenge_alot); | |
| 127 unsigned int invocations = Universe::heap()->total_collections() - Universe::heap()->total_full_collections(); | |
| 128 // Compute new interval | |
| 129 if (ScavengeALotInterval > 1) { | |
| 130 _scavenge_alot_counter = 1+(long)((double)ScavengeALotInterval*os::random()/(max_jint+1.0)); | |
| 131 if (PrintGCDetails && Verbose) { | |
| 132 tty->print_cr("Scavenge no: %u\tInterval: %d", invocations, | |
| 133 _scavenge_alot_counter); | |
| 134 } | |
| 135 } else { | |
| 136 _scavenge_alot_counter = 1; | |
| 137 } | |
| 138 // Print progress message | |
| 139 if (invocations % 1000 == 0) { | |
| 140 if (PrintGCDetails && Verbose) tty->print_cr("Scavenge no: %u", invocations); | |
| 141 } | |
| 142 } | |
| 143 } | |
| 144 } | |
| 145 } | |
| 146 | |
| 147 | |
| 148 vframe* vframe_array[50]; | |
| 149 int walk_stack_counter = 0; | |
| 150 | |
| 151 void InterfaceSupport::walk_stack_from(vframe* start_vf) { | |
| 152 // walk | |
| 153 int i = 0; | |
| 154 for (vframe* f = start_vf; f; f = f->sender() ) { | |
| 155 if (i < 50) vframe_array[i++] = f; | |
| 156 } | |
| 157 } | |
| 158 | |
| 159 | |
| 160 void InterfaceSupport::walk_stack() { | |
| 161 JavaThread* thread = JavaThread::current(); | |
| 162 walk_stack_counter++; | |
| 163 if (!thread->has_last_Java_frame()) return; | |
| 164 ResourceMark rm(thread); | |
| 165 RegisterMap reg_map(thread); | |
| 166 walk_stack_from(thread->last_java_vframe(®_map)); | |
| 167 } | |
| 168 | |
| 169 | |
| 170 # ifdef ENABLE_ZAP_DEAD_LOCALS | |
| 171 | |
| 172 static int zap_traversals = 0; | |
| 173 | |
| 174 void InterfaceSupport::zap_dead_locals_old() { | |
| 175 JavaThread* thread = JavaThread::current(); | |
| 176 if (zap_traversals == -1) // edit constant for debugging | |
| 177 warning("I am here"); | |
| 178 int zap_frame_count = 0; // count frames to help debugging | |
| 179 for (StackFrameStream sfs(thread); !sfs.is_done(); sfs.next()) { | |
| 180 sfs.current()->zap_dead_locals(thread, sfs.register_map()); | |
| 181 ++zap_frame_count; | |
| 182 } | |
| 183 ++zap_traversals; | |
| 184 } | |
| 185 | |
| 186 # endif | |
| 187 | |
| 188 | |
| 189 int deoptimizeAllCounter = 0; | |
| 190 int zombieAllCounter = 0; | |
| 191 | |
| 192 | |
| 193 void InterfaceSupport::zombieAll() { | |
| 194 if (is_init_completed() && zombieAllCounter > ZombieALotInterval) { | |
| 195 zombieAllCounter = 0; | |
| 196 VM_ZombieAll op; | |
| 197 VMThread::execute(&op); | |
| 198 } else { | |
| 199 zombieAllCounter++; | |
| 200 } | |
| 201 } | |
| 202 | |
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203 void InterfaceSupport::unlinkSymbols() { |
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204 VM_UnlinkSymbols op; |
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205 VMThread::execute(&op); |
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206 } |
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207 |
| 0 | 208 void InterfaceSupport::deoptimizeAll() { |
| 209 if (is_init_completed() ) { | |
| 210 if (DeoptimizeALot && deoptimizeAllCounter > DeoptimizeALotInterval) { | |
| 211 deoptimizeAllCounter = 0; | |
| 212 VM_DeoptimizeAll op; | |
| 213 VMThread::execute(&op); | |
| 214 } else if (DeoptimizeRandom && (deoptimizeAllCounter & 0x1f) == (os::random() & 0x1f)) { | |
| 215 VM_DeoptimizeAll op; | |
| 216 VMThread::execute(&op); | |
| 217 } | |
| 218 } | |
| 219 deoptimizeAllCounter++; | |
| 220 } | |
| 221 | |
| 222 | |
| 223 void InterfaceSupport::stress_derived_pointers() { | |
| 224 #ifdef COMPILER2 | |
| 225 JavaThread *thread = JavaThread::current(); | |
| 226 if (!is_init_completed()) return; | |
| 227 ResourceMark rm(thread); | |
| 228 bool found = false; | |
| 229 for (StackFrameStream sfs(thread); !sfs.is_done() && !found; sfs.next()) { | |
| 230 CodeBlob* cb = sfs.current()->cb(); | |
| 231 if (cb != NULL && cb->oop_maps() ) { | |
| 232 // Find oopmap for current method | |
| 233 OopMap* map = cb->oop_map_for_return_address(sfs.current()->pc()); | |
| 234 assert(map != NULL, "no oopmap found for pc"); | |
| 235 found = map->has_derived_pointer(); | |
| 236 } | |
| 237 } | |
| 238 if (found) { | |
| 239 // $$$ Not sure what to do here. | |
| 240 /* | |
| 241 Scavenge::invoke(0); | |
| 242 */ | |
| 243 } | |
| 244 #endif | |
| 245 } | |
| 246 | |
| 247 | |
| 248 void InterfaceSupport::verify_stack() { | |
| 249 JavaThread* thread = JavaThread::current(); | |
| 250 ResourceMark rm(thread); | |
| 251 // disabled because it throws warnings that oop maps should only be accessed | |
| 252 // in VM thread or during debugging | |
| 253 | |
| 254 if (!thread->has_pending_exception()) { | |
| 255 // verification does not work if there are pending exceptions | |
| 256 StackFrameStream sfs(thread); | |
| 257 CodeBlob* cb = sfs.current()->cb(); | |
| 258 // In case of exceptions we might not have a runtime_stub on | |
| 259 // top of stack, hence, all callee-saved registers are not going | |
| 260 // to be setup correctly, hence, we cannot do stack verify | |
| 261 if (cb != NULL && !(cb->is_runtime_stub() || cb->is_uncommon_trap_stub())) return; | |
| 262 | |
| 263 for (; !sfs.is_done(); sfs.next()) { | |
| 264 sfs.current()->verify(sfs.register_map()); | |
| 265 } | |
| 266 } | |
| 267 } | |
| 268 | |
| 269 | |
| 270 void InterfaceSupport::verify_last_frame() { | |
| 271 JavaThread* thread = JavaThread::current(); | |
| 272 ResourceMark rm(thread); | |
| 273 RegisterMap reg_map(thread); | |
| 274 frame fr = thread->last_frame(); | |
| 275 fr.verify(®_map); | |
| 276 } | |
| 277 | |
| 278 | |
| 279 #endif // ASSERT | |
| 280 | |
| 281 | |
| 282 void InterfaceSupport_init() { | |
| 283 #ifdef ASSERT | |
| 284 if (ScavengeALot || FullGCALot) { | |
| 285 srand(ScavengeALotInterval * FullGCALotInterval); | |
| 286 } | |
| 287 #endif | |
| 288 } |