1 /*
   2  * Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
   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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 #include "precompiled.hpp"
  25 #include "jvm.h"
  26 #include "asm/codeBuffer.hpp"
  27 #include "classfile/javaClasses.inline.hpp"
  28 #include "code/codeCache.hpp"
  29 #include "code/compiledMethod.inline.hpp"
  30 #include "compiler/compileBroker.hpp"
  31 #include "compiler/disassembler.hpp"
  32 #include "jvmci/jvmciRuntime.hpp"
  33 #include "jvmci/jvmciCompilerToVM.hpp"
  34 #include "jvmci/jvmciCompiler.hpp"
  35 #include "jvmci/jvmciJavaClasses.hpp"
  36 #include "jvmci/jvmciEnv.hpp"
  37 #include "logging/log.hpp"
  38 #include "memory/allocation.inline.hpp"
  39 #include "memory/oopFactory.hpp"
  40 #include "memory/resourceArea.hpp"
  41 #include "oops/oop.inline.hpp"
  42 #include "oops/objArrayOop.inline.hpp"
  43 #include "runtime/biasedLocking.hpp"
  44 #include "runtime/frame.inline.hpp"
  45 #include "runtime/interfaceSupport.inline.hpp"
  46 #include "runtime/jniHandles.inline.hpp"
  47 #include "runtime/reflection.hpp"
  48 #include "runtime/sharedRuntime.hpp"
  49 #include "runtime/threadSMR.hpp"
  50 #include "utilities/debug.hpp"
  51 #include "utilities/defaultStream.hpp"
  52 #include "utilities/macros.hpp"
  53 #if INCLUDE_G1GC
  54 #include "gc/g1/g1ThreadLocalData.hpp"
  55 #endif // INCLUDE_G1GC
  56 
  57 #if defined(_MSC_VER)
  58 #define strtoll _strtoi64
  59 #endif
  60 
  61 jobject JVMCIRuntime::_HotSpotJVMCIRuntime_instance = NULL;
  62 bool JVMCIRuntime::_HotSpotJVMCIRuntime_initialized = false;
  63 bool JVMCIRuntime::_well_known_classes_initialized = false;
  64 JVMCIRuntime::CompLevelAdjustment JVMCIRuntime::_comp_level_adjustment = JVMCIRuntime::none;
  65 bool JVMCIRuntime::_shutdown_called = false;
  66 
  67 BasicType JVMCIRuntime::kindToBasicType(Handle kind, TRAPS) {
  68   if (kind.is_null()) {
  69     THROW_(vmSymbols::java_lang_NullPointerException(), T_ILLEGAL);
  70   }
  71   jchar ch = JavaKind::typeChar(kind);
  72   switch(ch) {
  73     case 'Z': return T_BOOLEAN;
  74     case 'B': return T_BYTE;
  75     case 'S': return T_SHORT;
  76     case 'C': return T_CHAR;
  77     case 'I': return T_INT;
  78     case 'F': return T_FLOAT;
  79     case 'J': return T_LONG;
  80     case 'D': return T_DOUBLE;
  81     case 'A': return T_OBJECT;
  82     case '-': return T_ILLEGAL;
  83     default:
  84       JVMCI_ERROR_(T_ILLEGAL, "unexpected Kind: %c", ch);
  85   }
  86 }
  87 
  88 // Simple helper to see if the caller of a runtime stub which
  89 // entered the VM has been deoptimized
  90 
  91 static bool caller_is_deopted() {
  92   JavaThread* thread = JavaThread::current();
  93   RegisterMap reg_map(thread, false);
  94   frame runtime_frame = thread->last_frame();
  95   frame caller_frame = runtime_frame.sender(&reg_map);
  96   assert(caller_frame.is_compiled_frame(), "must be compiled");
  97   return caller_frame.is_deoptimized_frame();
  98 }
  99 
 100 // Stress deoptimization
 101 static void deopt_caller() {
 102   if ( !caller_is_deopted()) {
 103     JavaThread* thread = JavaThread::current();
 104     RegisterMap reg_map(thread, false);
 105     frame runtime_frame = thread->last_frame();
 106     frame caller_frame = runtime_frame.sender(&reg_map);
 107     Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
 108     assert(caller_is_deopted(), "Must be deoptimized");
 109   }
 110 }
 111 
 112 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_instance(JavaThread* thread, Klass* klass))
 113   JRT_BLOCK;
 114   assert(klass->is_klass(), "not a class");
 115   Handle holder(THREAD, klass->klass_holder()); // keep the klass alive
 116   InstanceKlass* ik = InstanceKlass::cast(klass);
 117   ik->check_valid_for_instantiation(true, CHECK);
 118   // make sure klass is initialized
 119   ik->initialize(CHECK);
 120   // allocate instance and return via TLS
 121   oop obj = ik->allocate_instance(CHECK);
 122   thread->set_vm_result(obj);
 123   JRT_BLOCK_END;
 124   SharedRuntime::on_slowpath_allocation_exit(thread);
 125 JRT_END
 126 
 127 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_array(JavaThread* thread, Klass* array_klass, jint length))
 128   JRT_BLOCK;
 129   // Note: no handle for klass needed since they are not used
 130   //       anymore after new_objArray() and no GC can happen before.
 131   //       (This may have to change if this code changes!)
 132   assert(array_klass->is_klass(), "not a class");
 133   oop obj;
 134   if (array_klass->is_typeArray_klass()) {
 135     BasicType elt_type = TypeArrayKlass::cast(array_klass)->element_type();
 136     obj = oopFactory::new_typeArray(elt_type, length, CHECK);
 137   } else {
 138     Handle holder(THREAD, array_klass->klass_holder()); // keep the klass alive
 139     Klass* elem_klass = ObjArrayKlass::cast(array_klass)->element_klass();
 140     obj = oopFactory::new_objArray(elem_klass, length, CHECK);
 141   }
 142   thread->set_vm_result(obj);
 143   // This is pretty rare but this runtime patch is stressful to deoptimization
 144   // if we deoptimize here so force a deopt to stress the path.
 145   if (DeoptimizeALot) {
 146     static int deopts = 0;
 147     // Alternate between deoptimizing and raising an error (which will also cause a deopt)
 148     if (deopts++ % 2 == 0) {
 149       ResourceMark rm(THREAD);
 150       THROW(vmSymbols::java_lang_OutOfMemoryError());
 151     } else {
 152       deopt_caller();
 153     }
 154   }
 155   JRT_BLOCK_END;
 156   SharedRuntime::on_slowpath_allocation_exit(thread);
 157 JRT_END
 158 
 159 JRT_ENTRY(void, JVMCIRuntime::new_multi_array(JavaThread* thread, Klass* klass, int rank, jint* dims))
 160   assert(klass->is_klass(), "not a class");
 161   assert(rank >= 1, "rank must be nonzero");
 162   Handle holder(THREAD, klass->klass_holder()); // keep the klass alive
 163   oop obj = ArrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK);
 164   thread->set_vm_result(obj);
 165 JRT_END
 166 
 167 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_array(JavaThread* thread, oopDesc* element_mirror, jint length))
 168   oop obj = Reflection::reflect_new_array(element_mirror, length, CHECK);
 169   thread->set_vm_result(obj);
 170 JRT_END
 171 
 172 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_instance(JavaThread* thread, oopDesc* type_mirror))
 173   InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(type_mirror));
 174 
 175   if (klass == NULL) {
 176     ResourceMark rm(THREAD);
 177     THROW(vmSymbols::java_lang_InstantiationException());
 178   }
 179 
 180   // Create new instance (the receiver)
 181   klass->check_valid_for_instantiation(false, CHECK);
 182 
 183   // Make sure klass gets initialized
 184   klass->initialize(CHECK);
 185 
 186   oop obj = klass->allocate_instance(CHECK);
 187   thread->set_vm_result(obj);
 188 JRT_END
 189 
 190 extern void vm_exit(int code);
 191 
 192 // Enter this method from compiled code handler below. This is where we transition
 193 // to VM mode. This is done as a helper routine so that the method called directly
 194 // from compiled code does not have to transition to VM. This allows the entry
 195 // method to see if the nmethod that we have just looked up a handler for has
 196 // been deoptimized while we were in the vm. This simplifies the assembly code
 197 // cpu directories.
 198 //
 199 // We are entering here from exception stub (via the entry method below)
 200 // If there is a compiled exception handler in this method, we will continue there;
 201 // otherwise we will unwind the stack and continue at the caller of top frame method
 202 // Note: we enter in Java using a special JRT wrapper. This wrapper allows us to
 203 // control the area where we can allow a safepoint. After we exit the safepoint area we can
 204 // check to see if the handler we are going to return is now in a nmethod that has
 205 // been deoptimized. If that is the case we return the deopt blob
 206 // unpack_with_exception entry instead. This makes life for the exception blob easier
 207 // because making that same check and diverting is painful from assembly language.
 208 JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* thread, oopDesc* ex, address pc, CompiledMethod*& cm))
 209   // Reset method handle flag.
 210   thread->set_is_method_handle_return(false);
 211 
 212   Handle exception(thread, ex);
 213   cm = CodeCache::find_compiled(pc);
 214   assert(cm != NULL, "this is not a compiled method");
 215   // Adjust the pc as needed/
 216   if (cm->is_deopt_pc(pc)) {
 217     RegisterMap map(thread, false);
 218     frame exception_frame = thread->last_frame().sender(&map);
 219     // if the frame isn't deopted then pc must not correspond to the caller of last_frame
 220     assert(exception_frame.is_deoptimized_frame(), "must be deopted");
 221     pc = exception_frame.pc();
 222   }
 223 #ifdef ASSERT
 224   assert(exception.not_null(), "NULL exceptions should be handled by throw_exception");
 225   // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
 226   if (!(exception->is_a(SystemDictionary::Throwable_klass()))) {
 227     if (ExitVMOnVerifyError) vm_exit(-1);
 228     ShouldNotReachHere();
 229   }
 230 #endif
 231 
 232   // Check the stack guard pages and reenable them if necessary and there is
 233   // enough space on the stack to do so.  Use fast exceptions only if the guard
 234   // pages are enabled.
 235   bool guard_pages_enabled = thread->stack_guards_enabled();
 236   if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack();
 237 
 238   if (JvmtiExport::can_post_on_exceptions()) {
 239     // To ensure correct notification of exception catches and throws
 240     // we have to deoptimize here.  If we attempted to notify the
 241     // catches and throws during this exception lookup it's possible
 242     // we could deoptimize on the way out of the VM and end back in
 243     // the interpreter at the throw site.  This would result in double
 244     // notifications since the interpreter would also notify about
 245     // these same catches and throws as it unwound the frame.
 246 
 247     RegisterMap reg_map(thread);
 248     frame stub_frame = thread->last_frame();
 249     frame caller_frame = stub_frame.sender(&reg_map);
 250 
 251     // We don't really want to deoptimize the nmethod itself since we
 252     // can actually continue in the exception handler ourselves but I
 253     // don't see an easy way to have the desired effect.
 254     Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
 255     assert(caller_is_deopted(), "Must be deoptimized");
 256 
 257     return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
 258   }
 259 
 260   // ExceptionCache is used only for exceptions at call sites and not for implicit exceptions
 261   if (guard_pages_enabled) {
 262     address fast_continuation = cm->handler_for_exception_and_pc(exception, pc);
 263     if (fast_continuation != NULL) {
 264       // Set flag if return address is a method handle call site.
 265       thread->set_is_method_handle_return(cm->is_method_handle_return(pc));
 266       return fast_continuation;
 267     }
 268   }
 269 
 270   // If the stack guard pages are enabled, check whether there is a handler in
 271   // the current method.  Otherwise (guard pages disabled), force an unwind and
 272   // skip the exception cache update (i.e., just leave continuation==NULL).
 273   address continuation = NULL;
 274   if (guard_pages_enabled) {
 275 
 276     // New exception handling mechanism can support inlined methods
 277     // with exception handlers since the mappings are from PC to PC
 278 
 279     // debugging support
 280     // tracing
 281     if (log_is_enabled(Info, exceptions)) {
 282       ResourceMark rm;
 283       stringStream tempst;
 284       assert(cm->method() != NULL, "Unexpected null method()");
 285       tempst.print("compiled method <%s>\n"
 286                    " at PC" INTPTR_FORMAT " for thread " INTPTR_FORMAT,
 287                    cm->method()->print_value_string(), p2i(pc), p2i(thread));
 288       Exceptions::log_exception(exception, tempst);
 289     }
 290     // for AbortVMOnException flag
 291     NOT_PRODUCT(Exceptions::debug_check_abort(exception));
 292 
 293     // Clear out the exception oop and pc since looking up an
 294     // exception handler can cause class loading, which might throw an
 295     // exception and those fields are expected to be clear during
 296     // normal bytecode execution.
 297     thread->clear_exception_oop_and_pc();
 298 
 299     bool recursive_exception = false;
 300     continuation = SharedRuntime::compute_compiled_exc_handler(cm, pc, exception, false, false, recursive_exception);
 301     // If an exception was thrown during exception dispatch, the exception oop may have changed
 302     thread->set_exception_oop(exception());
 303     thread->set_exception_pc(pc);
 304 
 305     // the exception cache is used only by non-implicit exceptions
 306     // Update the exception cache only when there didn't happen
 307     // another exception during the computation of the compiled
 308     // exception handler. Checking for exception oop equality is not
 309     // sufficient because some exceptions are pre-allocated and reused.
 310     if (continuation != NULL && !recursive_exception && !SharedRuntime::deopt_blob()->contains(continuation)) {
 311       cm->add_handler_for_exception_and_pc(exception, pc, continuation);
 312     }
 313   }
 314 
 315   // Set flag if return address is a method handle call site.
 316   thread->set_is_method_handle_return(cm->is_method_handle_return(pc));
 317 
 318   if (log_is_enabled(Info, exceptions)) {
 319     ResourceMark rm;
 320     log_info(exceptions)("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT
 321                          " for exception thrown at PC " PTR_FORMAT,
 322                          p2i(thread), p2i(continuation), p2i(pc));
 323   }
 324 
 325   return continuation;
 326 JRT_END
 327 
 328 // Enter this method from compiled code only if there is a Java exception handler
 329 // in the method handling the exception.
 330 // We are entering here from exception stub. We don't do a normal VM transition here.
 331 // We do it in a helper. This is so we can check to see if the nmethod we have just
 332 // searched for an exception handler has been deoptimized in the meantime.
 333 address JVMCIRuntime::exception_handler_for_pc(JavaThread* thread) {
 334   oop exception = thread->exception_oop();
 335   address pc = thread->exception_pc();
 336   // Still in Java mode
 337   DEBUG_ONLY(ResetNoHandleMark rnhm);
 338   CompiledMethod* cm = NULL;
 339   address continuation = NULL;
 340   {
 341     // Enter VM mode by calling the helper
 342     ResetNoHandleMark rnhm;
 343     continuation = exception_handler_for_pc_helper(thread, exception, pc, cm);
 344   }
 345   // Back in JAVA, use no oops DON'T safepoint
 346 
 347   // Now check to see if the compiled method we were called from is now deoptimized.
 348   // If so we must return to the deopt blob and deoptimize the nmethod
 349   if (cm != NULL && caller_is_deopted()) {
 350     continuation = SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
 351   }
 352 
 353   assert(continuation != NULL, "no handler found");
 354   return continuation;
 355 }
 356 
 357 JRT_ENTRY_NO_ASYNC(void, JVMCIRuntime::monitorenter(JavaThread* thread, oopDesc* obj, BasicLock* lock))
 358   IF_TRACE_jvmci_3 {
 359     char type[O_BUFLEN];
 360     obj->klass()->name()->as_C_string(type, O_BUFLEN);
 361     markOop mark = obj->mark();
 362     TRACE_jvmci_3("%s: entered locking slow case with obj=" INTPTR_FORMAT ", type=%s, mark=" INTPTR_FORMAT ", lock=" INTPTR_FORMAT, thread->name(), p2i(obj), type, p2i(mark), p2i(lock));
 363     tty->flush();
 364   }
 365 #ifdef ASSERT
 366   if (PrintBiasedLockingStatistics) {
 367     Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
 368   }
 369 #endif
 370   Handle h_obj(thread, obj);
 371   if (UseBiasedLocking) {
 372     // Retry fast entry if bias is revoked to avoid unnecessary inflation
 373     ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK);
 374   } else {
 375     if (JVMCIUseFastLocking) {
 376       // When using fast locking, the compiled code has already tried the fast case
 377       ObjectSynchronizer::slow_enter(h_obj, lock, THREAD);
 378     } else {
 379       ObjectSynchronizer::fast_enter(h_obj, lock, false, THREAD);
 380     }
 381   }
 382   TRACE_jvmci_3("%s: exiting locking slow with obj=" INTPTR_FORMAT, thread->name(), p2i(obj));
 383 JRT_END
 384 
 385 JRT_LEAF(void, JVMCIRuntime::monitorexit(JavaThread* thread, oopDesc* obj, BasicLock* lock))
 386   assert(thread == JavaThread::current(), "threads must correspond");
 387   assert(thread->last_Java_sp(), "last_Java_sp must be set");
 388   // monitorexit is non-blocking (leaf routine) => no exceptions can be thrown
 389   EXCEPTION_MARK;
 390 
 391 #ifdef DEBUG
 392   if (!oopDesc::is_oop(obj)) {
 393     ResetNoHandleMark rhm;
 394     nmethod* method = thread->last_frame().cb()->as_nmethod_or_null();
 395     if (method != NULL) {
 396       tty->print_cr("ERROR in monitorexit in method %s wrong obj " INTPTR_FORMAT, method->name(), p2i(obj));
 397     }
 398     thread->print_stack_on(tty);
 399     assert(false, "invalid lock object pointer dected");
 400   }
 401 #endif
 402 
 403   if (JVMCIUseFastLocking) {
 404     // When using fast locking, the compiled code has already tried the fast case
 405     ObjectSynchronizer::slow_exit(obj, lock, THREAD);
 406   } else {
 407     ObjectSynchronizer::fast_exit(obj, lock, THREAD);
 408   }
 409   IF_TRACE_jvmci_3 {
 410     char type[O_BUFLEN];
 411     obj->klass()->name()->as_C_string(type, O_BUFLEN);
 412     TRACE_jvmci_3("%s: exited locking slow case with obj=" INTPTR_FORMAT ", type=%s, mark=" INTPTR_FORMAT ", lock=" INTPTR_FORMAT, thread->name(), p2i(obj), type, p2i(obj->mark()), p2i(lock));
 413     tty->flush();
 414   }
 415 JRT_END
 416 
 417 // Object.notify() fast path, caller does slow path
 418 JRT_LEAF(jboolean, JVMCIRuntime::object_notify(JavaThread *thread, oopDesc* obj))
 419 
 420   // Very few notify/notifyAll operations find any threads on the waitset, so
 421   // the dominant fast-path is to simply return.
 422   // Relatedly, it's critical that notify/notifyAll be fast in order to
 423   // reduce lock hold times.
 424   if (!SafepointSynchronize::is_synchronizing()) {
 425     if (ObjectSynchronizer::quick_notify(obj, thread, false)) {
 426       return true;
 427     }
 428   }
 429   return false; // caller must perform slow path
 430 
 431 JRT_END
 432 
 433 // Object.notifyAll() fast path, caller does slow path
 434 JRT_LEAF(jboolean, JVMCIRuntime::object_notifyAll(JavaThread *thread, oopDesc* obj))
 435 
 436   if (!SafepointSynchronize::is_synchronizing() ) {
 437     if (ObjectSynchronizer::quick_notify(obj, thread, true)) {
 438       return true;
 439     }
 440   }
 441   return false; // caller must perform slow path
 442 
 443 JRT_END
 444 
 445 JRT_ENTRY(void, JVMCIRuntime::throw_and_post_jvmti_exception(JavaThread* thread, const char* exception, const char* message))
 446   TempNewSymbol symbol = SymbolTable::new_symbol(exception, CHECK);
 447   SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, message);
 448 JRT_END
 449 
 450 JRT_ENTRY(void, JVMCIRuntime::throw_klass_external_name_exception(JavaThread* thread, const char* exception, Klass* klass))
 451   ResourceMark rm(thread);
 452   TempNewSymbol symbol = SymbolTable::new_symbol(exception, CHECK);
 453   SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, klass->external_name());
 454 JRT_END
 455 
 456 JRT_ENTRY(void, JVMCIRuntime::throw_class_cast_exception(JavaThread* thread, const char* exception, Klass* caster_klass, Klass* target_klass))
 457   ResourceMark rm(thread);
 458   const char* message = SharedRuntime::generate_class_cast_message(caster_klass, target_klass);
 459   TempNewSymbol symbol = SymbolTable::new_symbol(exception, CHECK);
 460   SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, message);
 461 JRT_END
 462 
 463 JRT_LEAF(void, JVMCIRuntime::log_object(JavaThread* thread, oopDesc* obj, bool as_string, bool newline))
 464   ttyLocker ttyl;
 465 
 466   if (obj == NULL) {
 467     tty->print("NULL");
 468   } else if (oopDesc::is_oop_or_null(obj, true) && (!as_string || !java_lang_String::is_instance(obj))) {
 469     if (oopDesc::is_oop_or_null(obj, true)) {
 470       char buf[O_BUFLEN];
 471       tty->print("%s@" INTPTR_FORMAT, obj->klass()->name()->as_C_string(buf, O_BUFLEN), p2i(obj));
 472     } else {
 473       tty->print(INTPTR_FORMAT, p2i(obj));
 474     }
 475   } else {
 476     ResourceMark rm;
 477     assert(obj != NULL && java_lang_String::is_instance(obj), "must be");
 478     char *buf = java_lang_String::as_utf8_string(obj);
 479     tty->print_raw(buf);
 480   }
 481   if (newline) {
 482     tty->cr();
 483   }
 484 JRT_END
 485 
 486 #if INCLUDE_G1GC
 487 
 488 JRT_LEAF(void, JVMCIRuntime::write_barrier_pre(JavaThread* thread, oopDesc* obj))
 489   G1ThreadLocalData::satb_mark_queue(thread).enqueue(obj);
 490 JRT_END
 491 
 492 JRT_LEAF(void, JVMCIRuntime::write_barrier_post(JavaThread* thread, void* card_addr))
 493   G1ThreadLocalData::dirty_card_queue(thread).enqueue(card_addr);
 494 JRT_END
 495 
 496 #endif // INCLUDE_G1GC
 497 
 498 JRT_LEAF(jboolean, JVMCIRuntime::validate_object(JavaThread* thread, oopDesc* parent, oopDesc* child))
 499   bool ret = true;
 500   if(!Universe::heap()->is_in_closed_subset(parent)) {
 501     tty->print_cr("Parent Object " INTPTR_FORMAT " not in heap", p2i(parent));
 502     parent->print();
 503     ret=false;
 504   }
 505   if(!Universe::heap()->is_in_closed_subset(child)) {
 506     tty->print_cr("Child Object " INTPTR_FORMAT " not in heap", p2i(child));
 507     child->print();
 508     ret=false;
 509   }
 510   return (jint)ret;
 511 JRT_END
 512 
 513 JRT_ENTRY(void, JVMCIRuntime::vm_error(JavaThread* thread, jlong where, jlong format, jlong value))
 514   ResourceMark rm;
 515   const char *error_msg = where == 0L ? "<internal JVMCI error>" : (char*) (address) where;
 516   char *detail_msg = NULL;
 517   if (format != 0L) {
 518     const char* buf = (char*) (address) format;
 519     size_t detail_msg_length = strlen(buf) * 2;
 520     detail_msg = (char *) NEW_RESOURCE_ARRAY(u_char, detail_msg_length);
 521     jio_snprintf(detail_msg, detail_msg_length, buf, value);
 522     report_vm_error(__FILE__, __LINE__, error_msg, "%s", detail_msg);
 523   } else {
 524     report_vm_error(__FILE__, __LINE__, error_msg);
 525   }
 526 JRT_END
 527 
 528 JRT_LEAF(oopDesc*, JVMCIRuntime::load_and_clear_exception(JavaThread* thread))
 529   oop exception = thread->exception_oop();
 530   assert(exception != NULL, "npe");
 531   thread->set_exception_oop(NULL);
 532   thread->set_exception_pc(0);
 533   return exception;
 534 JRT_END
 535 
 536 PRAGMA_DIAG_PUSH
 537 PRAGMA_FORMAT_NONLITERAL_IGNORED
 538 JRT_LEAF(void, JVMCIRuntime::log_printf(JavaThread* thread, const char* format, jlong v1, jlong v2, jlong v3))
 539   ResourceMark rm;
 540   tty->print(format, v1, v2, v3);
 541 JRT_END
 542 PRAGMA_DIAG_POP
 543 
 544 static void decipher(jlong v, bool ignoreZero) {
 545   if (v != 0 || !ignoreZero) {
 546     void* p = (void *)(address) v;
 547     CodeBlob* cb = CodeCache::find_blob(p);
 548     if (cb) {
 549       if (cb->is_nmethod()) {
 550         char buf[O_BUFLEN];
 551         tty->print("%s [" INTPTR_FORMAT "+" JLONG_FORMAT "]", cb->as_nmethod_or_null()->method()->name_and_sig_as_C_string(buf, O_BUFLEN), p2i(cb->code_begin()), (jlong)((address)v - cb->code_begin()));
 552         return;
 553       }
 554       cb->print_value_on(tty);
 555       return;
 556     }
 557     if (Universe::heap()->is_in(p)) {
 558       oop obj = oop(p);
 559       obj->print_value_on(tty);
 560       return;
 561     }
 562     tty->print(INTPTR_FORMAT " [long: " JLONG_FORMAT ", double %lf, char %c]",p2i((void *)v), (jlong)v, (jdouble)v, (char)v);
 563   }
 564 }
 565 
 566 PRAGMA_DIAG_PUSH
 567 PRAGMA_FORMAT_NONLITERAL_IGNORED
 568 JRT_LEAF(void, JVMCIRuntime::vm_message(jboolean vmError, jlong format, jlong v1, jlong v2, jlong v3))
 569   ResourceMark rm;
 570   const char *buf = (const char*) (address) format;
 571   if (vmError) {
 572     if (buf != NULL) {
 573       fatal(buf, v1, v2, v3);
 574     } else {
 575       fatal("<anonymous error>");
 576     }
 577   } else if (buf != NULL) {
 578     tty->print(buf, v1, v2, v3);
 579   } else {
 580     assert(v2 == 0, "v2 != 0");
 581     assert(v3 == 0, "v3 != 0");
 582     decipher(v1, false);
 583   }
 584 JRT_END
 585 PRAGMA_DIAG_POP
 586 
 587 JRT_LEAF(void, JVMCIRuntime::log_primitive(JavaThread* thread, jchar typeChar, jlong value, jboolean newline))
 588   union {
 589       jlong l;
 590       jdouble d;
 591       jfloat f;
 592   } uu;
 593   uu.l = value;
 594   switch (typeChar) {
 595     case 'Z': tty->print(value == 0 ? "false" : "true"); break;
 596     case 'B': tty->print("%d", (jbyte) value); break;
 597     case 'C': tty->print("%c", (jchar) value); break;
 598     case 'S': tty->print("%d", (jshort) value); break;
 599     case 'I': tty->print("%d", (jint) value); break;
 600     case 'F': tty->print("%f", uu.f); break;
 601     case 'J': tty->print(JLONG_FORMAT, value); break;
 602     case 'D': tty->print("%lf", uu.d); break;
 603     default: assert(false, "unknown typeChar"); break;
 604   }
 605   if (newline) {
 606     tty->cr();
 607   }
 608 JRT_END
 609 
 610 JRT_ENTRY(jint, JVMCIRuntime::identity_hash_code(JavaThread* thread, oopDesc* obj))
 611   return (jint) obj->identity_hash();
 612 JRT_END
 613 
 614 JRT_ENTRY(jboolean, JVMCIRuntime::thread_is_interrupted(JavaThread* thread, oopDesc* receiver, jboolean clear_interrupted))
 615   Handle receiverHandle(thread, receiver);
 616   // A nested ThreadsListHandle may require the Threads_lock which
 617   // requires thread_in_vm which is why this method cannot be JRT_LEAF.
 618   ThreadsListHandle tlh;
 619 
 620   JavaThread* receiverThread = java_lang_Thread::thread(receiverHandle());
 621   if (receiverThread == NULL || (EnableThreadSMRExtraValidityChecks && !tlh.includes(receiverThread))) {
 622     // The other thread may exit during this process, which is ok so return false.
 623     return JNI_FALSE;
 624   } else {
 625     return (jint) Thread::is_interrupted(receiverThread, clear_interrupted != 0);
 626   }
 627 JRT_END
 628 
 629 JRT_ENTRY(int, JVMCIRuntime::test_deoptimize_call_int(JavaThread* thread, int value))
 630   deopt_caller();
 631   return value;
 632 JRT_END
 633 
 634 void JVMCIRuntime::force_initialization(TRAPS) {
 635   JVMCIRuntime::initialize_well_known_classes(CHECK);
 636 
 637   ResourceMark rm;
 638   TempNewSymbol getCompiler = SymbolTable::new_symbol("getCompiler", CHECK);
 639   TempNewSymbol sig = SymbolTable::new_symbol("()Ljdk/vm/ci/runtime/JVMCICompiler;", CHECK);
 640   Handle jvmciRuntime = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK);
 641   JavaValue result(T_OBJECT);
 642   JavaCalls::call_virtual(&result, jvmciRuntime, HotSpotJVMCIRuntime::klass(), getCompiler, sig, CHECK);
 643 }
 644 
 645 // private static JVMCIRuntime JVMCI.initializeRuntime()
 646 JVM_ENTRY(jobject, JVM_GetJVMCIRuntime(JNIEnv *env, jclass c))
 647   if (!EnableJVMCI) {
 648     THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled")
 649   }
 650   JVMCIRuntime::initialize_HotSpotJVMCIRuntime(CHECK_NULL);
 651   jobject ret = JVMCIRuntime::get_HotSpotJVMCIRuntime_jobject(CHECK_NULL);
 652   return ret;
 653 JVM_END
 654 
 655 Handle JVMCIRuntime::callStatic(const char* className, const char* methodName, const char* signature, JavaCallArguments* args, TRAPS) {
 656   TempNewSymbol name = SymbolTable::new_symbol(className, CHECK_(Handle()));
 657   Klass* klass = SystemDictionary::resolve_or_fail(name, true, CHECK_(Handle()));
 658   TempNewSymbol runtime = SymbolTable::new_symbol(methodName, CHECK_(Handle()));
 659   TempNewSymbol sig = SymbolTable::new_symbol(signature, CHECK_(Handle()));
 660   JavaValue result(T_OBJECT);
 661   if (args == NULL) {
 662     JavaCalls::call_static(&result, klass, runtime, sig, CHECK_(Handle()));
 663   } else {
 664     JavaCalls::call_static(&result, klass, runtime, sig, args, CHECK_(Handle()));
 665   }
 666   return Handle(THREAD, (oop)result.get_jobject());
 667 }
 668 
 669 Handle JVMCIRuntime::get_HotSpotJVMCIRuntime(TRAPS) {
 670   initialize_JVMCI(CHECK_(Handle()));
 671   return Handle(THREAD, JNIHandles::resolve_non_null(_HotSpotJVMCIRuntime_instance));
 672 }
 673 
 674 void JVMCIRuntime::initialize_HotSpotJVMCIRuntime(TRAPS) {
 675   guarantee(!_HotSpotJVMCIRuntime_initialized, "cannot reinitialize HotSpotJVMCIRuntime");
 676   JVMCIRuntime::initialize_well_known_classes(CHECK);
 677   // This should only be called in the context of the JVMCI class being initialized
 678   InstanceKlass* klass = SystemDictionary::JVMCI_klass();
 679   guarantee(klass->is_being_initialized() && klass->is_reentrant_initialization(THREAD),
 680          "HotSpotJVMCIRuntime initialization should only be triggered through JVMCI initialization");
 681 
 682   Handle result = callStatic("jdk/vm/ci/hotspot/HotSpotJVMCIRuntime",
 683                              "runtime",
 684                              "()Ljdk/vm/ci/hotspot/HotSpotJVMCIRuntime;", NULL, CHECK);
 685   int adjustment = HotSpotJVMCIRuntime::compilationLevelAdjustment(result);
 686   assert(adjustment >= JVMCIRuntime::none &&
 687          adjustment <= JVMCIRuntime::by_full_signature,
 688          "compilation level adjustment out of bounds");
 689   _comp_level_adjustment = (CompLevelAdjustment) adjustment;
 690   _HotSpotJVMCIRuntime_initialized = true;
 691   _HotSpotJVMCIRuntime_instance = JNIHandles::make_global(result);
 692 }
 693 
 694 void JVMCIRuntime::initialize_JVMCI(TRAPS) {
 695   if (JNIHandles::resolve(_HotSpotJVMCIRuntime_instance) == NULL) {
 696     callStatic("jdk/vm/ci/runtime/JVMCI",
 697                "getRuntime",
 698                "()Ljdk/vm/ci/runtime/JVMCIRuntime;", NULL, CHECK);
 699   }
 700   assert(_HotSpotJVMCIRuntime_initialized == true, "what?");
 701 }
 702 
 703 bool JVMCIRuntime::can_initialize_JVMCI() {
 704   // Initializing JVMCI requires the module system to be initialized past phase 3.
 705   // The JVMCI API itself isn't available until phase 2 and ServiceLoader (which
 706   // JVMCI initialization requires) isn't usable until after phase 3. Testing
 707   // whether the system loader is initialized satisfies all these invariants.
 708   if (SystemDictionary::java_system_loader() == NULL) {
 709     return false;
 710   }
 711   assert(Universe::is_module_initialized(), "must be");
 712   return true;
 713 }
 714 
 715 void JVMCIRuntime::initialize_well_known_classes(TRAPS) {
 716   if (JVMCIRuntime::_well_known_classes_initialized == false) {
 717     guarantee(can_initialize_JVMCI(), "VM is not yet sufficiently booted to initialize JVMCI");
 718     SystemDictionary::WKID scan = SystemDictionary::FIRST_JVMCI_WKID;
 719     SystemDictionary::resolve_wk_klasses_through(SystemDictionary::LAST_JVMCI_WKID, scan, CHECK);
 720     JVMCIJavaClasses::compute_offsets(CHECK);
 721     JVMCIRuntime::_well_known_classes_initialized = true;
 722   }
 723 }
 724 
 725 void JVMCIRuntime::metadata_do(void f(Metadata*)) {
 726   // For simplicity, the existence of HotSpotJVMCIMetaAccessContext in
 727   // the SystemDictionary well known classes should ensure the other
 728   // classes have already been loaded, so make sure their order in the
 729   // table enforces that.
 730   assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedJavaMethodImpl) <
 731          SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
 732   assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotConstantPool) <
 733          SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
 734   assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedObjectTypeImpl) <
 735          SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
 736 
 737   if (HotSpotJVMCIMetaAccessContext::klass() == NULL ||
 738       !HotSpotJVMCIMetaAccessContext::klass()->is_linked()) {
 739     // Nothing could be registered yet
 740     return;
 741   }
 742 
 743   // WeakReference<HotSpotJVMCIMetaAccessContext>[]
 744   objArrayOop allContexts = HotSpotJVMCIMetaAccessContext::allContexts();
 745   if (allContexts == NULL) {
 746     return;
 747   }
 748 
 749   // These must be loaded at this point but the linking state doesn't matter.
 750   assert(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass() != NULL, "must be loaded");
 751   assert(SystemDictionary::HotSpotConstantPool_klass() != NULL, "must be loaded");
 752   assert(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass() != NULL, "must be loaded");
 753 
 754   for (int i = 0; i < allContexts->length(); i++) {
 755     oop ref = allContexts->obj_at(i);
 756     if (ref != NULL) {
 757       oop referent = java_lang_ref_Reference::referent(ref);
 758       if (referent != NULL) {
 759         // Chunked Object[] with last element pointing to next chunk
 760         objArrayOop metadataRoots = HotSpotJVMCIMetaAccessContext::metadataRoots(referent);
 761         while (metadataRoots != NULL) {
 762           for (int typeIndex = 0; typeIndex < metadataRoots->length() - 1; typeIndex++) {
 763             oop reference = metadataRoots->obj_at(typeIndex);
 764             if (reference == NULL) {
 765               continue;
 766             }
 767             oop metadataRoot = java_lang_ref_Reference::referent(reference);
 768             if (metadataRoot == NULL) {
 769               continue;
 770             }
 771             if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass())) {
 772               Method* method = CompilerToVM::asMethod(metadataRoot);
 773               f(method);
 774             } else if (metadataRoot->is_a(SystemDictionary::HotSpotConstantPool_klass())) {
 775               ConstantPool* constantPool = CompilerToVM::asConstantPool(metadataRoot);
 776               f(constantPool);
 777             } else if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass())) {
 778               Klass* klass = CompilerToVM::asKlass(metadataRoot);
 779               f(klass);
 780             } else {
 781               metadataRoot->print();
 782               ShouldNotReachHere();
 783             }
 784           }
 785           metadataRoots = (objArrayOop)metadataRoots->obj_at(metadataRoots->length() - 1);
 786           assert(metadataRoots == NULL || metadataRoots->is_objArray(), "wrong type");
 787         }
 788       }
 789     }
 790   }
 791 }
 792 
 793 // private static void CompilerToVM.registerNatives()
 794 JVM_ENTRY(void, JVM_RegisterJVMCINatives(JNIEnv *env, jclass c2vmClass))
 795   if (!EnableJVMCI) {
 796     THROW_MSG(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled");
 797   }
 798 
 799 #ifdef _LP64
 800 #ifndef SPARC
 801   uintptr_t heap_end = (uintptr_t) Universe::heap()->reserved_region().end();
 802   uintptr_t allocation_end = heap_end + ((uintptr_t)16) * 1024 * 1024 * 1024;
 803   guarantee(heap_end < allocation_end, "heap end too close to end of address space (might lead to erroneous TLAB allocations)");
 804 #endif // !SPARC
 805 #else
 806   fatal("check TLAB allocation code for address space conflicts");
 807 #endif // _LP64
 808 
 809   JVMCIRuntime::initialize_well_known_classes(CHECK);
 810 
 811   {
 812     ThreadToNativeFromVM trans(thread);
 813     env->RegisterNatives(c2vmClass, CompilerToVM::methods, CompilerToVM::methods_count());
 814   }
 815 JVM_END
 816 
 817 void JVMCIRuntime::shutdown(TRAPS) {
 818   if (_HotSpotJVMCIRuntime_instance != NULL) {
 819     _shutdown_called = true;
 820     HandleMark hm(THREAD);
 821     Handle receiver = get_HotSpotJVMCIRuntime(CHECK);
 822     JavaValue result(T_VOID);
 823     JavaCallArguments args;
 824     args.push_oop(receiver);
 825     JavaCalls::call_special(&result, receiver->klass(), vmSymbols::shutdown_method_name(), vmSymbols::void_method_signature(), &args, CHECK);
 826   }
 827 }
 828 
 829 CompLevel JVMCIRuntime::adjust_comp_level_inner(const methodHandle& method, bool is_osr, CompLevel level, JavaThread* thread) {
 830   JVMCICompiler* compiler = JVMCICompiler::instance(false, thread);
 831   if (compiler != NULL && compiler->is_bootstrapping()) {
 832     return level;
 833   }
 834   if (!is_HotSpotJVMCIRuntime_initialized() || _comp_level_adjustment == JVMCIRuntime::none) {
 835     // JVMCI cannot participate in compilation scheduling until
 836     // JVMCI is initialized and indicates it wants to participate.
 837     return level;
 838   }
 839 
 840 #define CHECK_RETURN THREAD); \
 841   if (HAS_PENDING_EXCEPTION) { \
 842     Handle exception(THREAD, PENDING_EXCEPTION); \
 843     CLEAR_PENDING_EXCEPTION; \
 844   \
 845     if (exception->is_a(SystemDictionary::ThreadDeath_klass())) { \
 846       /* In the special case of ThreadDeath, we need to reset the */ \
 847       /* pending async exception so that it is propagated.        */ \
 848       thread->set_pending_async_exception(exception()); \
 849       return level; \
 850     } \
 851     tty->print("Uncaught exception while adjusting compilation level: "); \
 852     java_lang_Throwable::print(exception(), tty); \
 853     tty->cr(); \
 854     java_lang_Throwable::print_stack_trace(exception, tty); \
 855     if (HAS_PENDING_EXCEPTION) { \
 856       CLEAR_PENDING_EXCEPTION; \
 857     } \
 858     return level; \
 859   } \
 860   (void)(0
 861 
 862 
 863   Thread* THREAD = thread;
 864   HandleMark hm;
 865   Handle receiver = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK_RETURN);
 866   Handle name;
 867   Handle sig;
 868   if (_comp_level_adjustment == JVMCIRuntime::by_full_signature) {
 869     name = java_lang_String::create_from_symbol(method->name(), CHECK_RETURN);
 870     sig = java_lang_String::create_from_symbol(method->signature(), CHECK_RETURN);
 871   } else {
 872     name = Handle();
 873     sig = Handle();
 874   }
 875 
 876   JavaValue result(T_INT);
 877   JavaCallArguments args;
 878   args.push_oop(receiver);
 879   args.push_oop(Handle(THREAD, method->method_holder()->java_mirror()));
 880   args.push_oop(name);
 881   args.push_oop(sig);
 882   args.push_int(is_osr);
 883   args.push_int(level);
 884   JavaCalls::call_special(&result, receiver->klass(), vmSymbols::adjustCompilationLevel_name(),
 885                           vmSymbols::adjustCompilationLevel_signature(), &args, CHECK_RETURN);
 886 
 887   int comp_level = result.get_jint();
 888   if (comp_level < CompLevel_none || comp_level > CompLevel_full_optimization) {
 889     assert(false, "compilation level out of bounds");
 890     return level;
 891   }
 892   return (CompLevel) comp_level;
 893 #undef CHECK_RETURN
 894 }
 895 
 896 void JVMCIRuntime::bootstrap_finished(TRAPS) {
 897   HandleMark hm(THREAD);
 898   Handle receiver = get_HotSpotJVMCIRuntime(CHECK);
 899   JavaValue result(T_VOID);
 900   JavaCallArguments args;
 901   args.push_oop(receiver);
 902   JavaCalls::call_special(&result, receiver->klass(), vmSymbols::bootstrapFinished_method_name(), vmSymbols::void_method_signature(), &args, CHECK);
 903 }