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src/share/vm/runtime/interfaceSupport.hpp@7ee622712fcf (annotated)

src/share/vm/runtime/interfaceSupport.hpp

Tue, 04 Mar 2008 09:44:24 -0500

author
sbohne
date
Tue, 04 Mar 2008 09:44:24 -0500
changeset 493
7ee622712fcf
parent 435
a61af66fc99e
child 1907
c18cbe5936b8
permissions
-rw-r--r--

6666698: EnableBiasedLocking with BiasedLockingStartupDelay can block Watcher thread
Summary: Enqueue VM_EnableBiasedLocking operation asynchronously
Reviewed-by: never, xlu, kbr, acorn

duke@435 1 /*
duke@435 2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
duke@435 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435 4 *
duke@435 5 * This code is free software; you can redistribute it and/or modify it
duke@435 6 * under the terms of the GNU General Public License version 2 only, as
duke@435 7 * published by the Free Software Foundation.
duke@435 8 *
duke@435 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@435 13 * accompanied this code).
duke@435 14 *
duke@435 15 * You should have received a copy of the GNU General Public License version
duke@435 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@435 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435 18 *
duke@435 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435 20 * CA 95054 USA or visit www.sun.com if you need additional information or
duke@435 21 * have any questions.
duke@435 22 *
duke@435 23 */
duke@435 24
duke@435 25 // Wrapper for all entry points to the virtual machine.
duke@435 26 // The HandleMarkCleaner is a faster version of HandleMark.
duke@435 27 // It relies on the fact that there is a HandleMark further
duke@435 28 // down the stack (in JavaCalls::call_helper), and just resets
duke@435 29 // to the saved values in that HandleMark.
duke@435 30
duke@435 31 class HandleMarkCleaner: public StackObj {
duke@435 32 private:
duke@435 33 Thread* _thread;
duke@435 34 public:
duke@435 35 HandleMarkCleaner(Thread* thread) {
duke@435 36 _thread = thread;
duke@435 37 _thread->last_handle_mark()->push();
duke@435 38 }
duke@435 39 ~HandleMarkCleaner() {
duke@435 40 _thread->last_handle_mark()->pop_and_restore();
duke@435 41 }
duke@435 42
duke@435 43 private:
duke@435 44 inline void* operator new(size_t size, void* ptr) {
duke@435 45 return ptr;
duke@435 46 }
duke@435 47 };
duke@435 48
duke@435 49 // InterfaceSupport provides functionality used by the __LEAF and __ENTRY
duke@435 50 // macros. These macros are used to guard entry points into the VM and
duke@435 51 // perform checks upon leave of the VM.
duke@435 52
duke@435 53
duke@435 54 class InterfaceSupport: AllStatic {
duke@435 55 # ifdef ASSERT
duke@435 56 public:
duke@435 57 static long _scavenge_alot_counter;
duke@435 58 static long _fullgc_alot_counter;
duke@435 59 static long _number_of_calls;
duke@435 60 static long _fullgc_alot_invocation;
duke@435 61
duke@435 62 // tracing
duke@435 63 static void trace(const char* result_type, const char* header);
duke@435 64
duke@435 65 // Helper methods used to implement +ScavengeALot and +FullGCALot
duke@435 66 static void check_gc_alot() { if (ScavengeALot || FullGCALot) gc_alot(); }
duke@435 67 static void gc_alot();
duke@435 68
duke@435 69 static void walk_stack_from(vframe* start_vf);
duke@435 70 static void walk_stack();
duke@435 71
duke@435 72 # ifdef ENABLE_ZAP_DEAD_LOCALS
duke@435 73 static void zap_dead_locals_old();
duke@435 74 # endif
duke@435 75
duke@435 76 static void zombieAll();
duke@435 77 static void deoptimizeAll();
duke@435 78 static void stress_derived_pointers();
duke@435 79 static void verify_stack();
duke@435 80 static void verify_last_frame();
duke@435 81 # endif
duke@435 82
duke@435 83 public:
duke@435 84 // OS dependent stuff
duke@435 85 #include "incls/_interfaceSupport_pd.hpp.incl"
duke@435 86 };
duke@435 87
duke@435 88
duke@435 89 // Basic class for all thread transition classes.
duke@435 90
duke@435 91 class ThreadStateTransition : public StackObj {
duke@435 92 protected:
duke@435 93 JavaThread* _thread;
duke@435 94 public:
duke@435 95 ThreadStateTransition(JavaThread *thread) {
duke@435 96 _thread = thread;
duke@435 97 assert(thread != NULL && thread->is_Java_thread(), "must be Java thread");
duke@435 98 }
duke@435 99
duke@435 100 // Change threadstate in a manner, so safepoint can detect changes.
duke@435 101 // Time-critical: called on exit from every runtime routine
duke@435 102 static inline void transition(JavaThread *thread, JavaThreadState from, JavaThreadState to) {
duke@435 103 assert(from != _thread_in_Java, "use transition_from_java");
duke@435 104 assert(from != _thread_in_native, "use transition_from_native");
duke@435 105 assert((from & 1) == 0 && (to & 1) == 0, "odd numbers are transitions states");
duke@435 106 assert(thread->thread_state() == from, "coming from wrong thread state");
duke@435 107 // Change to transition state (assumes total store ordering! -Urs)
duke@435 108 thread->set_thread_state((JavaThreadState)(from + 1));
duke@435 109
duke@435 110 // Make sure new state is seen by VM thread
duke@435 111 if (os::is_MP()) {
duke@435 112 if (UseMembar) {
duke@435 113 // Force a fence between the write above and read below
duke@435 114 OrderAccess::fence();
duke@435 115 } else {
duke@435 116 // store to serialize page so VM thread can do pseudo remote membar
duke@435 117 os::write_memory_serialize_page(thread);
duke@435 118 }
duke@435 119 }
duke@435 120
duke@435 121 if (SafepointSynchronize::do_call_back()) {
duke@435 122 SafepointSynchronize::block(thread);
duke@435 123 }
duke@435 124 thread->set_thread_state(to);
duke@435 125
duke@435 126 CHECK_UNHANDLED_OOPS_ONLY(thread->clear_unhandled_oops();)
duke@435 127 }
duke@435 128
duke@435 129 // transition_and_fence must be used on any thread state transition
duke@435 130 // where there might not be a Java call stub on the stack, in
duke@435 131 // particular on Windows where the Structured Exception Handler is
duke@435 132 // set up in the call stub. os::write_memory_serialize_page() can
duke@435 133 // fault and we can't recover from it on Windows without a SEH in
duke@435 134 // place.
duke@435 135 static inline void transition_and_fence(JavaThread *thread, JavaThreadState from, JavaThreadState to) {
duke@435 136 assert(thread->thread_state() == from, "coming from wrong thread state");
duke@435 137 assert((from & 1) == 0 && (to & 1) == 0, "odd numbers are transitions states");
duke@435 138 // Change to transition state (assumes total store ordering! -Urs)
duke@435 139 thread->set_thread_state((JavaThreadState)(from + 1));
duke@435 140
duke@435 141 // Make sure new state is seen by VM thread
duke@435 142 if (os::is_MP()) {
duke@435 143 if (UseMembar) {
duke@435 144 // Force a fence between the write above and read below
duke@435 145 OrderAccess::fence();
duke@435 146 } else {
duke@435 147 // Must use this rather than serialization page in particular on Windows
duke@435 148 InterfaceSupport::serialize_memory(thread);
duke@435 149 }
duke@435 150 }
duke@435 151
duke@435 152 if (SafepointSynchronize::do_call_back()) {
duke@435 153 SafepointSynchronize::block(thread);
duke@435 154 }
duke@435 155 thread->set_thread_state(to);
duke@435 156
duke@435 157 CHECK_UNHANDLED_OOPS_ONLY(thread->clear_unhandled_oops();)
duke@435 158 }
duke@435 159
duke@435 160 // Same as above, but assumes from = _thread_in_Java. This is simpler, since we
duke@435 161 // never block on entry to the VM. This will break the code, since e.g. preserve arguments
duke@435 162 // have not been setup.
duke@435 163 static inline void transition_from_java(JavaThread *thread, JavaThreadState to) {
duke@435 164 assert(thread->thread_state() == _thread_in_Java, "coming from wrong thread state");
duke@435 165 thread->set_thread_state(to);
duke@435 166 }
duke@435 167
duke@435 168 static inline void transition_from_native(JavaThread *thread, JavaThreadState to) {
duke@435 169 assert((to & 1) == 0, "odd numbers are transitions states");
duke@435 170 assert(thread->thread_state() == _thread_in_native, "coming from wrong thread state");
duke@435 171 // Change to transition state (assumes total store ordering! -Urs)
duke@435 172 thread->set_thread_state(_thread_in_native_trans);
duke@435 173
duke@435 174 // Make sure new state is seen by GC thread
duke@435 175 if (os::is_MP()) {
duke@435 176 if (UseMembar) {
duke@435 177 // Force a fence between the write above and read below
duke@435 178 OrderAccess::fence();
duke@435 179 } else {
duke@435 180 // Must use this rather than serialization page in particular on Windows
duke@435 181 InterfaceSupport::serialize_memory(thread);
duke@435 182 }
duke@435 183 }
duke@435 184
duke@435 185 // We never install asynchronous exceptions when coming (back) in
duke@435 186 // to the runtime from native code because the runtime is not set
duke@435 187 // up to handle exceptions floating around at arbitrary points.
duke@435 188 if (SafepointSynchronize::do_call_back() || thread->is_suspend_after_native()) {
duke@435 189 JavaThread::check_safepoint_and_suspend_for_native_trans(thread);
duke@435 190
duke@435 191 // Clear unhandled oops anywhere where we could block, even if we don't.
duke@435 192 CHECK_UNHANDLED_OOPS_ONLY(thread->clear_unhandled_oops();)
duke@435 193 }
duke@435 194
duke@435 195 thread->set_thread_state(to);
duke@435 196 }
duke@435 197 protected:
duke@435 198 void trans(JavaThreadState from, JavaThreadState to) { transition(_thread, from, to); }
duke@435 199 void trans_from_java(JavaThreadState to) { transition_from_java(_thread, to); }
duke@435 200 void trans_from_native(JavaThreadState to) { transition_from_native(_thread, to); }
duke@435 201 void trans_and_fence(JavaThreadState from, JavaThreadState to) { transition_and_fence(_thread, from, to); }
duke@435 202 };
duke@435 203
duke@435 204
duke@435 205 class ThreadInVMfromJava : public ThreadStateTransition {
duke@435 206 public:
duke@435 207 ThreadInVMfromJava(JavaThread* thread) : ThreadStateTransition(thread) {
duke@435 208 trans_from_java(_thread_in_vm);
duke@435 209 }
duke@435 210 ~ThreadInVMfromJava() {
duke@435 211 trans(_thread_in_vm, _thread_in_Java);
duke@435 212 // Check for pending. async. exceptions or suspends.
duke@435 213 if (_thread->has_special_runtime_exit_condition()) _thread->handle_special_runtime_exit_condition();
duke@435 214 }
duke@435 215 };
duke@435 216
duke@435 217
duke@435 218 class ThreadInVMfromUnknown {
duke@435 219 private:
duke@435 220 JavaThread* _thread;
duke@435 221 public:
duke@435 222 ThreadInVMfromUnknown() : _thread(NULL) {
duke@435 223 Thread* t = Thread::current();
duke@435 224 if (t->is_Java_thread()) {
duke@435 225 JavaThread* t2 = (JavaThread*) t;
duke@435 226 if (t2->thread_state() == _thread_in_native) {
duke@435 227 _thread = t2;
duke@435 228 ThreadStateTransition::transition_from_native(t2, _thread_in_vm);
duke@435 229 // Used to have a HandleMarkCleaner but that is dangerous as
duke@435 230 // it could free a handle in our (indirect, nested) caller.
duke@435 231 // We expect any handles will be short lived and figure we
duke@435 232 // don't need an actual HandleMark.
duke@435 233 }
duke@435 234 }
duke@435 235 }
duke@435 236 ~ThreadInVMfromUnknown() {
duke@435 237 if (_thread) {
duke@435 238 ThreadStateTransition::transition_and_fence(_thread, _thread_in_vm, _thread_in_native);
duke@435 239 }
duke@435 240 }
duke@435 241 };
duke@435 242
duke@435 243
duke@435 244 class ThreadInVMfromNative : public ThreadStateTransition {
duke@435 245 public:
duke@435 246 ThreadInVMfromNative(JavaThread* thread) : ThreadStateTransition(thread) {
duke@435 247 trans_from_native(_thread_in_vm);
duke@435 248 }
duke@435 249 ~ThreadInVMfromNative() {
duke@435 250 trans_and_fence(_thread_in_vm, _thread_in_native);
duke@435 251 }
duke@435 252 };
duke@435 253
duke@435 254
duke@435 255 class ThreadToNativeFromVM : public ThreadStateTransition {
duke@435 256 public:
duke@435 257 ThreadToNativeFromVM(JavaThread *thread) : ThreadStateTransition(thread) {
duke@435 258 // We are leaving the VM at this point and going directly to native code.
duke@435 259 // Block, if we are in the middle of a safepoint synchronization.
duke@435 260 assert(!thread->owns_locks(), "must release all locks when leaving VM");
duke@435 261 thread->frame_anchor()->make_walkable(thread);
duke@435 262 trans_and_fence(_thread_in_vm, _thread_in_native);
duke@435 263 // Check for pending. async. exceptions or suspends.
duke@435 264 if (_thread->has_special_runtime_exit_condition()) _thread->handle_special_runtime_exit_condition(false);
duke@435 265 }
duke@435 266
duke@435 267 ~ThreadToNativeFromVM() {
duke@435 268 trans_from_native(_thread_in_vm);
duke@435 269 // We don't need to clear_walkable because it will happen automagically when we return to java
duke@435 270 }
duke@435 271 };
duke@435 272
duke@435 273
duke@435 274 class ThreadBlockInVM : public ThreadStateTransition {
duke@435 275 public:
duke@435 276 ThreadBlockInVM(JavaThread *thread)
duke@435 277 : ThreadStateTransition(thread) {
duke@435 278 // Once we are blocked vm expects stack to be walkable
duke@435 279 thread->frame_anchor()->make_walkable(thread);
duke@435 280 trans_and_fence(_thread_in_vm, _thread_blocked);
duke@435 281 }
duke@435 282 ~ThreadBlockInVM() {
duke@435 283 trans_and_fence(_thread_blocked, _thread_in_vm);
duke@435 284 // We don't need to clear_walkable because it will happen automagically when we return to java
duke@435 285 }
duke@435 286 };
duke@435 287
duke@435 288
duke@435 289 // This special transition class is only used to prevent asynchronous exceptions
duke@435 290 // from being installed on vm exit in situations where we can't tolerate them.
duke@435 291 // See bugs: 4324348, 4854693, 4998314, 5040492, 5050705.
duke@435 292 class ThreadInVMfromJavaNoAsyncException : public ThreadStateTransition {
duke@435 293 public:
duke@435 294 ThreadInVMfromJavaNoAsyncException(JavaThread* thread) : ThreadStateTransition(thread) {
duke@435 295 trans_from_java(_thread_in_vm);
duke@435 296 }
duke@435 297 ~ThreadInVMfromJavaNoAsyncException() {
duke@435 298 trans(_thread_in_vm, _thread_in_Java);
duke@435 299 // NOTE: We do not check for pending. async. exceptions.
duke@435 300 // If we did and moved the pending async exception over into the
duke@435 301 // pending exception field, we would need to deopt (currently C2
duke@435 302 // only). However, to do so would require that we transition back
duke@435 303 // to the _thread_in_vm state. Instead we postpone the handling of
duke@435 304 // the async exception.
duke@435 305
duke@435 306 // Check for pending. suspends only.
duke@435 307 if (_thread->has_special_runtime_exit_condition())
duke@435 308 _thread->handle_special_runtime_exit_condition(false);
duke@435 309 }
duke@435 310 };
duke@435 311
duke@435 312 // Debug class instantiated in JRT_ENTRY and ITR_ENTRY macro.
duke@435 313 // Can be used to verify properties on enter/exit of the VM.
duke@435 314
duke@435 315 #ifdef ASSERT
duke@435 316 class VMEntryWrapper {
duke@435 317 public:
duke@435 318 VMEntryWrapper() {
duke@435 319 if (VerifyLastFrame) {
duke@435 320 InterfaceSupport::verify_last_frame();
duke@435 321 }
duke@435 322 }
duke@435 323
duke@435 324 ~VMEntryWrapper() {
duke@435 325 InterfaceSupport::check_gc_alot();
duke@435 326 if (WalkStackALot) {
duke@435 327 InterfaceSupport::walk_stack();
duke@435 328 }
duke@435 329 #ifdef ENABLE_ZAP_DEAD_LOCALS
duke@435 330 if (ZapDeadLocalsOld) {
duke@435 331 InterfaceSupport::zap_dead_locals_old();
duke@435 332 }
duke@435 333 #endif
duke@435 334 #ifdef COMPILER2
duke@435 335 // This option is not used by Compiler 1
duke@435 336 if (StressDerivedPointers) {
duke@435 337 InterfaceSupport::stress_derived_pointers();
duke@435 338 }
duke@435 339 #endif
duke@435 340 if (DeoptimizeALot || DeoptimizeRandom) {
duke@435 341 InterfaceSupport::deoptimizeAll();
duke@435 342 }
duke@435 343 if (ZombieALot) {
duke@435 344 InterfaceSupport::zombieAll();
duke@435 345 }
duke@435 346 // do verification AFTER potential deoptimization
duke@435 347 if (VerifyStack) {
duke@435 348 InterfaceSupport::verify_stack();
duke@435 349 }
duke@435 350
duke@435 351 }
duke@435 352 };
duke@435 353
duke@435 354
duke@435 355 class VMNativeEntryWrapper {
duke@435 356 public:
duke@435 357 VMNativeEntryWrapper() {
duke@435 358 if (GCALotAtAllSafepoints) InterfaceSupport::check_gc_alot();
duke@435 359 }
duke@435 360
duke@435 361 ~VMNativeEntryWrapper() {
duke@435 362 if (GCALotAtAllSafepoints) InterfaceSupport::check_gc_alot();
duke@435 363 }
duke@435 364 };
duke@435 365
duke@435 366 #endif
duke@435 367
duke@435 368
duke@435 369 // VM-internal runtime interface support
duke@435 370
duke@435 371 #ifdef ASSERT
duke@435 372
duke@435 373 class RuntimeHistogramElement : public HistogramElement {
duke@435 374 public:
duke@435 375 RuntimeHistogramElement(const char* name);
duke@435 376 };
duke@435 377
duke@435 378 #define TRACE_CALL(result_type, header) \
duke@435 379 InterfaceSupport::_number_of_calls++; \
duke@435 380 if (TraceRuntimeCalls) \
duke@435 381 InterfaceSupport::trace(#result_type, #header); \
duke@435 382 if (CountRuntimeCalls) { \
duke@435 383 static RuntimeHistogramElement* e = new RuntimeHistogramElement(#header); \
duke@435 384 if (e != NULL) e->increment_count(); \
duke@435 385 }
duke@435 386 #else
duke@435 387 #define TRACE_CALL(result_type, header) \
duke@435 388 /* do nothing */
duke@435 389 #endif
duke@435 390
duke@435 391
duke@435 392 // LEAF routines do not lock, GC or throw exceptions
duke@435 393
duke@435 394 #define __LEAF(result_type, header) \
duke@435 395 TRACE_CALL(result_type, header) \
duke@435 396 debug_only(NoHandleMark __hm;) \
duke@435 397 /* begin of body */
duke@435 398
duke@435 399
duke@435 400 // ENTRY routines may lock, GC and throw exceptions
duke@435 401
duke@435 402 #define __ENTRY(result_type, header, thread) \
duke@435 403 TRACE_CALL(result_type, header) \
duke@435 404 HandleMarkCleaner __hm(thread); \
duke@435 405 Thread* THREAD = thread; \
duke@435 406 /* begin of body */
duke@435 407
duke@435 408
duke@435 409 // QUICK_ENTRY routines behave like ENTRY but without a handle mark
duke@435 410
duke@435 411 #define __QUICK_ENTRY(result_type, header, thread) \
duke@435 412 TRACE_CALL(result_type, header) \
duke@435 413 debug_only(NoHandleMark __hm;) \
duke@435 414 Thread* THREAD = thread; \
duke@435 415 /* begin of body */
duke@435 416
duke@435 417
duke@435 418 // Definitions for IRT (Interpreter Runtime)
duke@435 419 // (thread is an argument passed in to all these routines)
duke@435 420
duke@435 421 #define IRT_ENTRY(result_type, header) \
duke@435 422 result_type header { \
duke@435 423 ThreadInVMfromJava __tiv(thread); \
duke@435 424 __ENTRY(result_type, header, thread) \
duke@435 425 debug_only(VMEntryWrapper __vew;)
duke@435 426
duke@435 427
duke@435 428 #define IRT_LEAF(result_type, header) \
duke@435 429 result_type header { \
duke@435 430 __LEAF(result_type, header) \
duke@435 431 debug_only(No_Safepoint_Verifier __nspv(true);)
duke@435 432
duke@435 433
duke@435 434 #define IRT_ENTRY_NO_ASYNC(result_type, header) \
duke@435 435 result_type header { \
duke@435 436 ThreadInVMfromJavaNoAsyncException __tiv(thread); \
duke@435 437 __ENTRY(result_type, header, thread) \
duke@435 438 debug_only(VMEntryWrapper __vew;)
duke@435 439
duke@435 440 // Another special case for nmethod_entry_point so the nmethod that the
duke@435 441 // interpreter is about to branch to doesn't get flushed before as we
duke@435 442 // branch to it's interpreter_entry_point. Skip stress testing here too.
duke@435 443 // Also we don't allow async exceptions because it is just too painful.
duke@435 444 #define IRT_ENTRY_FOR_NMETHOD(result_type, header) \
duke@435 445 result_type header { \
duke@435 446 nmethodLocker _nmlock(nm); \
duke@435 447 ThreadInVMfromJavaNoAsyncException __tiv(thread); \
duke@435 448 __ENTRY(result_type, header, thread)
duke@435 449
duke@435 450 #define IRT_END }
duke@435 451
duke@435 452
duke@435 453 // Definitions for JRT (Java (Compiler/Shared) Runtime)
duke@435 454
duke@435 455 #define JRT_ENTRY(result_type, header) \
duke@435 456 result_type header { \
duke@435 457 ThreadInVMfromJava __tiv(thread); \
duke@435 458 __ENTRY(result_type, header, thread) \
duke@435 459 debug_only(VMEntryWrapper __vew;)
duke@435 460
duke@435 461
duke@435 462 #define JRT_LEAF(result_type, header) \
duke@435 463 result_type header { \
duke@435 464 __LEAF(result_type, header) \
duke@435 465 debug_only(JRT_Leaf_Verifier __jlv;)
duke@435 466
duke@435 467
duke@435 468 #define JRT_ENTRY_NO_ASYNC(result_type, header) \
duke@435 469 result_type header { \
duke@435 470 ThreadInVMfromJavaNoAsyncException __tiv(thread); \
duke@435 471 __ENTRY(result_type, header, thread) \
duke@435 472 debug_only(VMEntryWrapper __vew;)
duke@435 473
duke@435 474 // Same as JRT Entry but allows for return value after the safepoint
duke@435 475 // to get back into Java from the VM
duke@435 476 #define JRT_BLOCK_ENTRY(result_type, header) \
duke@435 477 result_type header { \
duke@435 478 TRACE_CALL(result_type, header) \
duke@435 479 HandleMarkCleaner __hm(thread);
duke@435 480
duke@435 481 #define JRT_BLOCK \
duke@435 482 { \
duke@435 483 ThreadInVMfromJava __tiv(thread); \
duke@435 484 Thread* THREAD = thread; \
duke@435 485 debug_only(VMEntryWrapper __vew;)
duke@435 486
duke@435 487 #define JRT_BLOCK_END }
duke@435 488
duke@435 489 #define JRT_END }
duke@435 490
duke@435 491 // Definitions for JNI
duke@435 492
duke@435 493 #define JNI_ENTRY(result_type, header) \
duke@435 494 JNI_ENTRY_NO_PRESERVE(result_type, header) \
duke@435 495 WeakPreserveExceptionMark __wem(thread);
duke@435 496
duke@435 497 #define JNI_ENTRY_NO_PRESERVE(result_type, header) \
duke@435 498 extern "C" { \
duke@435 499 result_type JNICALL header { \
duke@435 500 JavaThread* thread=JavaThread::thread_from_jni_environment(env); \
duke@435 501 assert( !VerifyJNIEnvThread || (thread == Thread::current()), "JNIEnv is only valid in same thread"); \
duke@435 502 ThreadInVMfromNative __tiv(thread); \
duke@435 503 debug_only(VMNativeEntryWrapper __vew;) \
duke@435 504 __ENTRY(result_type, header, thread)
duke@435 505
duke@435 506
duke@435 507 // Ensure that the VMNativeEntryWrapper constructor, which can cause
duke@435 508 // a GC, is called outside the NoHandleMark (set via __QUICK_ENTRY).
duke@435 509 #define JNI_QUICK_ENTRY(result_type, header) \
duke@435 510 extern "C" { \
duke@435 511 result_type JNICALL header { \
duke@435 512 JavaThread* thread=JavaThread::thread_from_jni_environment(env); \
duke@435 513 assert( !VerifyJNIEnvThread || (thread == Thread::current()), "JNIEnv is only valid in same thread"); \
duke@435 514 ThreadInVMfromNative __tiv(thread); \
duke@435 515 debug_only(VMNativeEntryWrapper __vew;) \
duke@435 516 __QUICK_ENTRY(result_type, header, thread)
duke@435 517
duke@435 518
duke@435 519 #define JNI_LEAF(result_type, header) \
duke@435 520 extern "C" { \
duke@435 521 result_type JNICALL header { \
duke@435 522 JavaThread* thread=JavaThread::thread_from_jni_environment(env); \
duke@435 523 assert( !VerifyJNIEnvThread || (thread == Thread::current()), "JNIEnv is only valid in same thread"); \
duke@435 524 __LEAF(result_type, header)
duke@435 525
duke@435 526
duke@435 527 // Close the routine and the extern "C"
duke@435 528 #define JNI_END } }
duke@435 529
duke@435 530
duke@435 531
duke@435 532 // Definitions for JVM
duke@435 533
duke@435 534 #define JVM_ENTRY(result_type, header) \
duke@435 535 extern "C" { \
duke@435 536 result_type JNICALL header { \
duke@435 537 JavaThread* thread=JavaThread::thread_from_jni_environment(env); \
duke@435 538 ThreadInVMfromNative __tiv(thread); \
duke@435 539 debug_only(VMNativeEntryWrapper __vew;) \
duke@435 540 __ENTRY(result_type, header, thread)
duke@435 541
duke@435 542
duke@435 543 #define JVM_ENTRY_NO_ENV(result_type, header) \
duke@435 544 extern "C" { \
duke@435 545 result_type JNICALL header { \
duke@435 546 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); \
duke@435 547 ThreadInVMfromNative __tiv(thread); \
duke@435 548 debug_only(VMNativeEntryWrapper __vew;) \
duke@435 549 __ENTRY(result_type, header, thread)
duke@435 550
duke@435 551
duke@435 552 #define JVM_QUICK_ENTRY(result_type, header) \
duke@435 553 extern "C" { \
duke@435 554 result_type JNICALL header { \
duke@435 555 JavaThread* thread=JavaThread::thread_from_jni_environment(env); \
duke@435 556 ThreadInVMfromNative __tiv(thread); \
duke@435 557 debug_only(VMNativeEntryWrapper __vew;) \
duke@435 558 __QUICK_ENTRY(result_type, header, thread)
duke@435 559
duke@435 560
duke@435 561 #define JVM_LEAF(result_type, header) \
duke@435 562 extern "C" { \
duke@435 563 result_type JNICALL header { \
duke@435 564 VM_Exit::block_if_vm_exited(); \
duke@435 565 __LEAF(result_type, header)
duke@435 566
duke@435 567
duke@435 568 #define JVM_END } }

Mercurial Repository: jdk8-mips64-public/hotspot

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