1 /*
   2  * Copyright (c) 2012, 2017, 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 "compiler/compileBroker.hpp"
  30 #include "compiler/disassembler.hpp"
  31 #include "jvmci/jvmciRuntime.hpp"
  32 #include "jvmci/jvmciCompilerToVM.hpp"
  33 #include "jvmci/jvmciCompiler.hpp"
  34 #include "jvmci/jvmciJavaClasses.hpp"
  35 #include "jvmci/jvmciEnv.hpp"
  36 #include "logging/log.hpp"
  37 #include "memory/oopFactory.hpp"
  38 #include "memory/resourceArea.hpp"
  39 #include "oops/oop.inline.hpp"
  40 #include "oops/objArrayOop.inline.hpp"
  41 #include "runtime/biasedLocking.hpp"
  42 #include "runtime/interfaceSupport.hpp"
  43 #include "runtime/reflection.hpp"
  44 #include "runtime/sharedRuntime.hpp"
  45 #include "utilities/debug.hpp"
  46 #include "utilities/defaultStream.hpp"
  47 #include "utilities/macros.hpp"
  48 
  49 #if defined(_MSC_VER)
  50 #define strtoll _strtoi64
  51 #endif
  52 
  53 jobject JVMCIRuntime::_HotSpotJVMCIRuntime_instance = NULL;
  54 bool JVMCIRuntime::_HotSpotJVMCIRuntime_initialized = false;
  55 bool JVMCIRuntime::_well_known_classes_initialized = false;
  56 int JVMCIRuntime::_trivial_prefixes_count = 0;
  57 char** JVMCIRuntime::_trivial_prefixes = NULL;
  58 JVMCIRuntime::CompLevelAdjustment JVMCIRuntime::_comp_level_adjustment = JVMCIRuntime::none;
  59 bool JVMCIRuntime::_shutdown_called = false;
  60 
  61 BasicType JVMCIRuntime::kindToBasicType(Handle kind, TRAPS) {
  62   if (kind.is_null()) {
  63     THROW_(vmSymbols::java_lang_NullPointerException(), T_ILLEGAL);
  64   }
  65   jchar ch = JavaKind::typeChar(kind);
  66   switch(ch) {
  67     case 'Z': return T_BOOLEAN;
  68     case 'B': return T_BYTE;
  69     case 'S': return T_SHORT;
  70     case 'C': return T_CHAR;
  71     case 'I': return T_INT;
  72     case 'F': return T_FLOAT;
  73     case 'J': return T_LONG;
  74     case 'D': return T_DOUBLE;
  75     case 'A': return T_OBJECT;
  76     case '-': return T_ILLEGAL;
  77     default:
  78       JVMCI_ERROR_(T_ILLEGAL, "unexpected Kind: %c", ch);
  79   }
  80 }
  81 
  82 // Simple helper to see if the caller of a runtime stub which
  83 // entered the VM has been deoptimized
  84 
  85 static bool caller_is_deopted() {
  86   JavaThread* thread = JavaThread::current();
  87   RegisterMap reg_map(thread, false);
  88   frame runtime_frame = thread->last_frame();
  89   frame caller_frame = runtime_frame.sender(&reg_map);
  90   assert(caller_frame.is_compiled_frame(), "must be compiled");
  91   return caller_frame.is_deoptimized_frame();
  92 }
  93 
  94 // Stress deoptimization
  95 static void deopt_caller() {
  96   if ( !caller_is_deopted()) {
  97     JavaThread* thread = JavaThread::current();
  98     RegisterMap reg_map(thread, false);
  99     frame runtime_frame = thread->last_frame();
 100     frame caller_frame = runtime_frame.sender(&reg_map);
 101     Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
 102     assert(caller_is_deopted(), "Must be deoptimized");
 103   }
 104 }
 105 
 106 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_instance(JavaThread* thread, Klass* klass))
 107   JRT_BLOCK;
 108   assert(klass->is_klass(), "not a class");
 109   Handle holder(THREAD, klass->klass_holder()); // keep the klass alive
 110   InstanceKlass* ik = InstanceKlass::cast(klass);
 111   ik->check_valid_for_instantiation(true, CHECK);
 112   // make sure klass is initialized
 113   ik->initialize(CHECK);
 114   // allocate instance and return via TLS
 115   oop obj = ik->allocate_instance(CHECK);
 116   thread->set_vm_result(obj);
 117   JRT_BLOCK_END;
 118 
 119   if (ReduceInitialCardMarks) {
 120     new_store_pre_barrier(thread);
 121   }
 122 JRT_END
 123 
 124 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_array(JavaThread* thread, Klass* array_klass, jint length))
 125   JRT_BLOCK;
 126   // Note: no handle for klass needed since they are not used
 127   //       anymore after new_objArray() and no GC can happen before.
 128   //       (This may have to change if this code changes!)
 129   assert(array_klass->is_klass(), "not a class");
 130   oop obj;
 131   if (array_klass->is_typeArray_klass()) {
 132     BasicType elt_type = TypeArrayKlass::cast(array_klass)->element_type();
 133     obj = oopFactory::new_typeArray(elt_type, length, CHECK);
 134   } else {
 135     Handle holder(THREAD, array_klass->klass_holder()); // keep the klass alive
 136     Klass* elem_klass = ObjArrayKlass::cast(array_klass)->element_klass();
 137     obj = oopFactory::new_objArray(elem_klass, length, CHECK);
 138   }
 139   thread->set_vm_result(obj);
 140   // This is pretty rare but this runtime patch is stressful to deoptimization
 141   // if we deoptimize here so force a deopt to stress the path.
 142   if (DeoptimizeALot) {
 143     static int deopts = 0;
 144     // Alternate between deoptimizing and raising an error (which will also cause a deopt)
 145     if (deopts++ % 2 == 0) {
 146       ResourceMark rm(THREAD);
 147       THROW(vmSymbols::java_lang_OutOfMemoryError());
 148     } else {
 149       deopt_caller();
 150     }
 151   }
 152   JRT_BLOCK_END;
 153 
 154   if (ReduceInitialCardMarks) {
 155     new_store_pre_barrier(thread);
 156   }
 157 JRT_END
 158 
 159 void JVMCIRuntime::new_store_pre_barrier(JavaThread* thread) {
 160   // After any safepoint, just before going back to compiled code,
 161   // we inform the GC that we will be doing initializing writes to
 162   // this object in the future without emitting card-marks, so
 163   // GC may take any compensating steps.
 164   // NOTE: Keep this code consistent with GraphKit::store_barrier.
 165 
 166   oop new_obj = thread->vm_result();
 167   if (new_obj == NULL)  return;
 168 
 169   assert(Universe::heap()->can_elide_tlab_store_barriers(),
 170          "compiler must check this first");
 171   // GC may decide to give back a safer copy of new_obj.
 172   new_obj = Universe::heap()->new_store_pre_barrier(thread, new_obj);
 173   thread->set_vm_result(new_obj);
 174 }
 175 
 176 JRT_ENTRY(void, JVMCIRuntime::new_multi_array(JavaThread* thread, Klass* klass, int rank, jint* dims))
 177   assert(klass->is_klass(), "not a class");
 178   assert(rank >= 1, "rank must be nonzero");
 179   Handle holder(THREAD, klass->klass_holder()); // keep the klass alive
 180   oop obj = ArrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK);
 181   thread->set_vm_result(obj);
 182 JRT_END
 183 
 184 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_array(JavaThread* thread, oopDesc* element_mirror, jint length))
 185   oop obj = Reflection::reflect_new_array(element_mirror, length, CHECK);
 186   thread->set_vm_result(obj);
 187 JRT_END
 188 
 189 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_instance(JavaThread* thread, oopDesc* type_mirror))
 190   InstanceKlass* klass = InstanceKlass::cast(java_lang_Class::as_Klass(type_mirror));
 191 
 192   if (klass == NULL) {
 193     ResourceMark rm(THREAD);
 194     THROW(vmSymbols::java_lang_InstantiationException());
 195   }
 196 
 197   // Create new instance (the receiver)
 198   klass->check_valid_for_instantiation(false, CHECK);
 199 
 200   // Make sure klass gets initialized
 201   klass->initialize(CHECK);
 202 
 203   oop obj = klass->allocate_instance(CHECK);
 204   thread->set_vm_result(obj);
 205 JRT_END
 206 
 207 extern void vm_exit(int code);
 208 
 209 // Enter this method from compiled code handler below. This is where we transition
 210 // to VM mode. This is done as a helper routine so that the method called directly
 211 // from compiled code does not have to transition to VM. This allows the entry
 212 // method to see if the nmethod that we have just looked up a handler for has
 213 // been deoptimized while we were in the vm. This simplifies the assembly code
 214 // cpu directories.
 215 //
 216 // We are entering here from exception stub (via the entry method below)
 217 // If there is a compiled exception handler in this method, we will continue there;
 218 // otherwise we will unwind the stack and continue at the caller of top frame method
 219 // Note: we enter in Java using a special JRT wrapper. This wrapper allows us to
 220 // control the area where we can allow a safepoint. After we exit the safepoint area we can
 221 // check to see if the handler we are going to return is now in a nmethod that has
 222 // been deoptimized. If that is the case we return the deopt blob
 223 // unpack_with_exception entry instead. This makes life for the exception blob easier
 224 // because making that same check and diverting is painful from assembly language.
 225 JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* thread, oopDesc* ex, address pc, CompiledMethod*& cm))
 226   // Reset method handle flag.
 227   thread->set_is_method_handle_return(false);
 228 
 229   Handle exception(thread, ex);
 230   cm = CodeCache::find_compiled(pc);
 231   assert(cm != NULL, "this is not a compiled method");
 232   // Adjust the pc as needed/
 233   if (cm->is_deopt_pc(pc)) {
 234     RegisterMap map(thread, false);
 235     frame exception_frame = thread->last_frame().sender(&map);
 236     // if the frame isn't deopted then pc must not correspond to the caller of last_frame
 237     assert(exception_frame.is_deoptimized_frame(), "must be deopted");
 238     pc = exception_frame.pc();
 239   }
 240 #ifdef ASSERT
 241   assert(exception.not_null(), "NULL exceptions should be handled by throw_exception");
 242   // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
 243   if (!(exception->is_a(SystemDictionary::Throwable_klass()))) {
 244     if (ExitVMOnVerifyError) vm_exit(-1);
 245     ShouldNotReachHere();
 246   }
 247 #endif
 248 
 249   // Check the stack guard pages and reenable them if necessary and there is
 250   // enough space on the stack to do so.  Use fast exceptions only if the guard
 251   // pages are enabled.
 252   bool guard_pages_enabled = thread->stack_guards_enabled();
 253   if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack();
 254 
 255   if (JvmtiExport::can_post_on_exceptions()) {
 256     // To ensure correct notification of exception catches and throws
 257     // we have to deoptimize here.  If we attempted to notify the
 258     // catches and throws during this exception lookup it's possible
 259     // we could deoptimize on the way out of the VM and end back in
 260     // the interpreter at the throw site.  This would result in double
 261     // notifications since the interpreter would also notify about
 262     // these same catches and throws as it unwound the frame.
 263 
 264     RegisterMap reg_map(thread);
 265     frame stub_frame = thread->last_frame();
 266     frame caller_frame = stub_frame.sender(&reg_map);
 267 
 268     // We don't really want to deoptimize the nmethod itself since we
 269     // can actually continue in the exception handler ourselves but I
 270     // don't see an easy way to have the desired effect.
 271     Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
 272     assert(caller_is_deopted(), "Must be deoptimized");
 273 
 274     return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
 275   }
 276 
 277   // ExceptionCache is used only for exceptions at call sites and not for implicit exceptions
 278   if (guard_pages_enabled) {
 279     address fast_continuation = cm->handler_for_exception_and_pc(exception, pc);
 280     if (fast_continuation != NULL) {
 281       // Set flag if return address is a method handle call site.
 282       thread->set_is_method_handle_return(cm->is_method_handle_return(pc));
 283       return fast_continuation;
 284     }
 285   }
 286 
 287   // If the stack guard pages are enabled, check whether there is a handler in
 288   // the current method.  Otherwise (guard pages disabled), force an unwind and
 289   // skip the exception cache update (i.e., just leave continuation==NULL).
 290   address continuation = NULL;
 291   if (guard_pages_enabled) {
 292 
 293     // New exception handling mechanism can support inlined methods
 294     // with exception handlers since the mappings are from PC to PC
 295 
 296     // debugging support
 297     // tracing
 298     if (log_is_enabled(Info, exceptions)) {
 299       ResourceMark rm;
 300       stringStream tempst;
 301       tempst.print("compiled method <%s>\n"
 302                    " at PC" INTPTR_FORMAT " for thread " INTPTR_FORMAT,
 303                    cm->method()->print_value_string(), p2i(pc), p2i(thread));
 304       Exceptions::log_exception(exception, tempst);
 305     }
 306     // for AbortVMOnException flag
 307     NOT_PRODUCT(Exceptions::debug_check_abort(exception));
 308 
 309     // Clear out the exception oop and pc since looking up an
 310     // exception handler can cause class loading, which might throw an
 311     // exception and those fields are expected to be clear during
 312     // normal bytecode execution.
 313     thread->clear_exception_oop_and_pc();
 314 
 315     bool recursive_exception = false;
 316     continuation = SharedRuntime::compute_compiled_exc_handler(cm, pc, exception, false, false, recursive_exception);
 317     // If an exception was thrown during exception dispatch, the exception oop may have changed
 318     thread->set_exception_oop(exception());
 319     thread->set_exception_pc(pc);
 320 
 321     // the exception cache is used only by non-implicit exceptions
 322     // Update the exception cache only when there didn't happen
 323     // another exception during the computation of the compiled
 324     // exception handler. Checking for exception oop equality is not
 325     // sufficient because some exceptions are pre-allocated and reused.
 326     if (continuation != NULL && !recursive_exception && !SharedRuntime::deopt_blob()->contains(continuation)) {
 327       cm->add_handler_for_exception_and_pc(exception, pc, continuation);
 328     }
 329   }
 330 
 331   // Set flag if return address is a method handle call site.
 332   thread->set_is_method_handle_return(cm->is_method_handle_return(pc));
 333 
 334   if (log_is_enabled(Info, exceptions)) {
 335     ResourceMark rm;
 336     log_info(exceptions)("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT
 337                          " for exception thrown at PC " PTR_FORMAT,
 338                          p2i(thread), p2i(continuation), p2i(pc));
 339   }
 340 
 341   return continuation;
 342 JRT_END
 343 
 344 // Enter this method from compiled code only if there is a Java exception handler
 345 // in the method handling the exception.
 346 // We are entering here from exception stub. We don't do a normal VM transition here.
 347 // We do it in a helper. This is so we can check to see if the nmethod we have just
 348 // searched for an exception handler has been deoptimized in the meantime.
 349 address JVMCIRuntime::exception_handler_for_pc(JavaThread* thread) {
 350   oop exception = thread->exception_oop();
 351   address pc = thread->exception_pc();
 352   // Still in Java mode
 353   DEBUG_ONLY(ResetNoHandleMark rnhm);
 354   CompiledMethod* cm = NULL;
 355   address continuation = NULL;
 356   {
 357     // Enter VM mode by calling the helper
 358     ResetNoHandleMark rnhm;
 359     continuation = exception_handler_for_pc_helper(thread, exception, pc, cm);
 360   }
 361   // Back in JAVA, use no oops DON'T safepoint
 362 
 363   // Now check to see if the compiled method we were called from is now deoptimized.
 364   // If so we must return to the deopt blob and deoptimize the nmethod
 365   if (cm != NULL && caller_is_deopted()) {
 366     continuation = SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
 367   }
 368 
 369   assert(continuation != NULL, "no handler found");
 370   return continuation;
 371 }
 372 
 373 JRT_ENTRY_NO_ASYNC(void, JVMCIRuntime::monitorenter(JavaThread* thread, oopDesc* obj, BasicLock* lock))
 374   IF_TRACE_jvmci_3 {
 375     char type[O_BUFLEN];
 376     obj->klass()->name()->as_C_string(type, O_BUFLEN);
 377     markOop mark = obj->mark();
 378     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));
 379     tty->flush();
 380   }
 381 #ifdef ASSERT
 382   if (PrintBiasedLockingStatistics) {
 383     Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
 384   }
 385 #endif
 386   Handle h_obj(thread, obj);
 387   if (UseBiasedLocking) {
 388     // Retry fast entry if bias is revoked to avoid unnecessary inflation
 389     ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK);
 390   } else {
 391     if (JVMCIUseFastLocking) {
 392       // When using fast locking, the compiled code has already tried the fast case
 393       ObjectSynchronizer::slow_enter(h_obj, lock, THREAD);
 394     } else {
 395       ObjectSynchronizer::fast_enter(h_obj, lock, false, THREAD);
 396     }
 397   }
 398   TRACE_jvmci_3("%s: exiting locking slow with obj=" INTPTR_FORMAT, thread->name(), p2i(obj));
 399 JRT_END
 400 
 401 JRT_LEAF(void, JVMCIRuntime::monitorexit(JavaThread* thread, oopDesc* obj, BasicLock* lock))
 402   assert(thread == JavaThread::current(), "threads must correspond");
 403   assert(thread->last_Java_sp(), "last_Java_sp must be set");
 404   // monitorexit is non-blocking (leaf routine) => no exceptions can be thrown
 405   EXCEPTION_MARK;
 406 
 407 #ifdef DEBUG
 408   if (!oopDesc::is_oop(obj)) {
 409     ResetNoHandleMark rhm;
 410     nmethod* method = thread->last_frame().cb()->as_nmethod_or_null();
 411     if (method != NULL) {
 412       tty->print_cr("ERROR in monitorexit in method %s wrong obj " INTPTR_FORMAT, method->name(), p2i(obj));
 413     }
 414     thread->print_stack_on(tty);
 415     assert(false, "invalid lock object pointer dected");
 416   }
 417 #endif
 418 
 419   if (JVMCIUseFastLocking) {
 420     // When using fast locking, the compiled code has already tried the fast case
 421     ObjectSynchronizer::slow_exit(obj, lock, THREAD);
 422   } else {
 423     ObjectSynchronizer::fast_exit(obj, lock, THREAD);
 424   }
 425   IF_TRACE_jvmci_3 {
 426     char type[O_BUFLEN];
 427     obj->klass()->name()->as_C_string(type, O_BUFLEN);
 428     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));
 429     tty->flush();
 430   }
 431 JRT_END
 432 
 433 JRT_ENTRY(void, JVMCIRuntime::throw_and_post_jvmti_exception(JavaThread* thread, const char* exception, const char* message))
 434   TempNewSymbol symbol = SymbolTable::new_symbol(exception, CHECK);
 435   SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, message);
 436 JRT_END
 437 
 438 JRT_ENTRY(void, JVMCIRuntime::throw_klass_external_name_exception(JavaThread* thread, const char* exception, Klass* klass))
 439   ResourceMark rm(thread);
 440   TempNewSymbol symbol = SymbolTable::new_symbol(exception, CHECK);
 441   SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, klass->external_name());
 442 JRT_END
 443 
 444 JRT_ENTRY(void, JVMCIRuntime::throw_class_cast_exception(JavaThread* thread, const char* exception, Klass* caster_klass, Klass* target_klass))
 445   ResourceMark rm(thread);
 446   const char* message = SharedRuntime::generate_class_cast_message(caster_klass, target_klass);
 447   TempNewSymbol symbol = SymbolTable::new_symbol(exception, CHECK);
 448   SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, message);
 449 JRT_END
 450 
 451 JRT_LEAF(void, JVMCIRuntime::log_object(JavaThread* thread, oopDesc* obj, bool as_string, bool newline))
 452   ttyLocker ttyl;
 453 
 454   if (obj == NULL) {
 455     tty->print("NULL");
 456   } else if (oopDesc::is_oop_or_null(obj, true) && (!as_string || !java_lang_String::is_instance(obj))) {
 457     if (oopDesc::is_oop_or_null(obj, true)) {
 458       char buf[O_BUFLEN];
 459       tty->print("%s@" INTPTR_FORMAT, obj->klass()->name()->as_C_string(buf, O_BUFLEN), p2i(obj));
 460     } else {
 461       tty->print(INTPTR_FORMAT, p2i(obj));
 462     }
 463   } else {
 464     ResourceMark rm;
 465     assert(obj != NULL && java_lang_String::is_instance(obj), "must be");
 466     char *buf = java_lang_String::as_utf8_string(obj);
 467     tty->print_raw(buf);
 468   }
 469   if (newline) {
 470     tty->cr();
 471   }
 472 JRT_END
 473 
 474 JRT_LEAF(void, JVMCIRuntime::write_barrier_pre(JavaThread* thread, oopDesc* obj))
 475   thread->satb_mark_queue().enqueue(obj);
 476 JRT_END
 477 
 478 JRT_LEAF(void, JVMCIRuntime::write_barrier_post(JavaThread* thread, void* card_addr))
 479   thread->dirty_card_queue().enqueue(card_addr);
 480 JRT_END
 481 
 482 JRT_LEAF(jboolean, JVMCIRuntime::validate_object(JavaThread* thread, oopDesc* parent, oopDesc* child))
 483   bool ret = true;
 484   if(!Universe::heap()->is_in_closed_subset(parent)) {
 485     tty->print_cr("Parent Object " INTPTR_FORMAT " not in heap", p2i(parent));
 486     parent->print();
 487     ret=false;
 488   }
 489   if(!Universe::heap()->is_in_closed_subset(child)) {
 490     tty->print_cr("Child Object " INTPTR_FORMAT " not in heap", p2i(child));
 491     child->print();
 492     ret=false;
 493   }
 494   return (jint)ret;
 495 JRT_END
 496 
 497 JRT_ENTRY(void, JVMCIRuntime::vm_error(JavaThread* thread, jlong where, jlong format, jlong value))
 498   ResourceMark rm;
 499   const char *error_msg = where == 0L ? "<internal JVMCI error>" : (char*) (address) where;
 500   char *detail_msg = NULL;
 501   if (format != 0L) {
 502     const char* buf = (char*) (address) format;
 503     size_t detail_msg_length = strlen(buf) * 2;
 504     detail_msg = (char *) NEW_RESOURCE_ARRAY(u_char, detail_msg_length);
 505     jio_snprintf(detail_msg, detail_msg_length, buf, value);
 506     report_vm_error(__FILE__, __LINE__, error_msg, "%s", detail_msg);
 507   } else {
 508     report_vm_error(__FILE__, __LINE__, error_msg);
 509   }
 510 JRT_END
 511 
 512 JRT_LEAF(oopDesc*, JVMCIRuntime::load_and_clear_exception(JavaThread* thread))
 513   oop exception = thread->exception_oop();
 514   assert(exception != NULL, "npe");
 515   thread->set_exception_oop(NULL);
 516   thread->set_exception_pc(0);
 517   return exception;
 518 JRT_END
 519 
 520 PRAGMA_DIAG_PUSH
 521 PRAGMA_FORMAT_NONLITERAL_IGNORED
 522 JRT_LEAF(void, JVMCIRuntime::log_printf(JavaThread* thread, oopDesc* format, jlong v1, jlong v2, jlong v3))
 523   ResourceMark rm;
 524   assert(format != NULL && java_lang_String::is_instance(format), "must be");
 525   char *buf = java_lang_String::as_utf8_string(format);
 526   tty->print((const char*)buf, v1, v2, v3);
 527 JRT_END
 528 PRAGMA_DIAG_POP
 529 
 530 static void decipher(jlong v, bool ignoreZero) {
 531   if (v != 0 || !ignoreZero) {
 532     void* p = (void *)(address) v;
 533     CodeBlob* cb = CodeCache::find_blob(p);
 534     if (cb) {
 535       if (cb->is_nmethod()) {
 536         char buf[O_BUFLEN];
 537         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()));
 538         return;
 539       }
 540       cb->print_value_on(tty);
 541       return;
 542     }
 543     if (Universe::heap()->is_in(p)) {
 544       oop obj = oop(p);
 545       obj->print_value_on(tty);
 546       return;
 547     }
 548     tty->print(INTPTR_FORMAT " [long: " JLONG_FORMAT ", double %lf, char %c]",p2i((void *)v), (jlong)v, (jdouble)v, (char)v);
 549   }
 550 }
 551 
 552 PRAGMA_DIAG_PUSH
 553 PRAGMA_FORMAT_NONLITERAL_IGNORED
 554 JRT_LEAF(void, JVMCIRuntime::vm_message(jboolean vmError, jlong format, jlong v1, jlong v2, jlong v3))
 555   ResourceMark rm;
 556   const char *buf = (const char*) (address) format;
 557   if (vmError) {
 558     if (buf != NULL) {
 559       fatal(buf, v1, v2, v3);
 560     } else {
 561       fatal("<anonymous error>");
 562     }
 563   } else if (buf != NULL) {
 564     tty->print(buf, v1, v2, v3);
 565   } else {
 566     assert(v2 == 0, "v2 != 0");
 567     assert(v3 == 0, "v3 != 0");
 568     decipher(v1, false);
 569   }
 570 JRT_END
 571 PRAGMA_DIAG_POP
 572 
 573 JRT_LEAF(void, JVMCIRuntime::log_primitive(JavaThread* thread, jchar typeChar, jlong value, jboolean newline))
 574   union {
 575       jlong l;
 576       jdouble d;
 577       jfloat f;
 578   } uu;
 579   uu.l = value;
 580   switch (typeChar) {
 581     case 'Z': tty->print(value == 0 ? "false" : "true"); break;
 582     case 'B': tty->print("%d", (jbyte) value); break;
 583     case 'C': tty->print("%c", (jchar) value); break;
 584     case 'S': tty->print("%d", (jshort) value); break;
 585     case 'I': tty->print("%d", (jint) value); break;
 586     case 'F': tty->print("%f", uu.f); break;
 587     case 'J': tty->print(JLONG_FORMAT, value); break;
 588     case 'D': tty->print("%lf", uu.d); break;
 589     default: assert(false, "unknown typeChar"); break;
 590   }
 591   if (newline) {
 592     tty->cr();
 593   }
 594 JRT_END
 595 
 596 JRT_ENTRY(jint, JVMCIRuntime::identity_hash_code(JavaThread* thread, oopDesc* obj))
 597   return (jint) obj->identity_hash();
 598 JRT_END
 599 
 600 JRT_ENTRY(jboolean, JVMCIRuntime::thread_is_interrupted(JavaThread* thread, oopDesc* receiver, jboolean clear_interrupted))
 601   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
 602   // This locking requires thread_in_vm which is why this method cannot be JRT_LEAF.
 603   Handle receiverHandle(thread, receiver);
 604   MutexLockerEx ml(thread->threadObj() == (void*)receiver ? NULL : Threads_lock);
 605   JavaThread* receiverThread = java_lang_Thread::thread(receiverHandle());
 606   if (receiverThread == NULL) {
 607     // The other thread may exit during this process, which is ok so return false.
 608     return JNI_FALSE;
 609   } else {
 610     return (jint) Thread::is_interrupted(receiverThread, clear_interrupted != 0);
 611   }
 612 JRT_END
 613 
 614 JRT_ENTRY(int, JVMCIRuntime::test_deoptimize_call_int(JavaThread* thread, int value))
 615   deopt_caller();
 616   return value;
 617 JRT_END
 618 
 619 void JVMCIRuntime::force_initialization(TRAPS) {
 620   JVMCIRuntime::initialize_well_known_classes(CHECK);
 621 
 622   ResourceMark rm;
 623   TempNewSymbol getCompiler = SymbolTable::new_symbol("getCompiler", CHECK);
 624   TempNewSymbol sig = SymbolTable::new_symbol("()Ljdk/vm/ci/runtime/JVMCICompiler;", CHECK);
 625   Handle jvmciRuntime = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK);
 626   JavaValue result(T_OBJECT);
 627   JavaCalls::call_virtual(&result, jvmciRuntime, HotSpotJVMCIRuntime::klass(), getCompiler, sig, CHECK);
 628 }
 629 
 630 // private static JVMCIRuntime JVMCI.initializeRuntime()
 631 JVM_ENTRY(jobject, JVM_GetJVMCIRuntime(JNIEnv *env, jclass c))
 632   if (!EnableJVMCI) {
 633     THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled")
 634   }
 635   JVMCIRuntime::initialize_HotSpotJVMCIRuntime(CHECK_NULL);
 636   jobject ret = JVMCIRuntime::get_HotSpotJVMCIRuntime_jobject(CHECK_NULL);
 637   return ret;
 638 JVM_END
 639 
 640 Handle JVMCIRuntime::callStatic(const char* className, const char* methodName, const char* signature, JavaCallArguments* args, TRAPS) {
 641   TempNewSymbol name = SymbolTable::new_symbol(className, CHECK_(Handle()));
 642   Klass* klass = SystemDictionary::resolve_or_fail(name, true, CHECK_(Handle()));
 643   TempNewSymbol runtime = SymbolTable::new_symbol(methodName, CHECK_(Handle()));
 644   TempNewSymbol sig = SymbolTable::new_symbol(signature, CHECK_(Handle()));
 645   JavaValue result(T_OBJECT);
 646   if (args == NULL) {
 647     JavaCalls::call_static(&result, klass, runtime, sig, CHECK_(Handle()));
 648   } else {
 649     JavaCalls::call_static(&result, klass, runtime, sig, args, CHECK_(Handle()));
 650   }
 651   return Handle(THREAD, (oop)result.get_jobject());
 652 }
 653 
 654 void JVMCIRuntime::initialize_HotSpotJVMCIRuntime(TRAPS) {
 655   guarantee(!_HotSpotJVMCIRuntime_initialized, "cannot reinitialize HotSpotJVMCIRuntime");
 656   JVMCIRuntime::initialize_well_known_classes(CHECK);
 657   // This should only be called in the context of the JVMCI class being initialized
 658   InstanceKlass* klass = SystemDictionary::JVMCI_klass();
 659   guarantee(klass->is_being_initialized() && klass->is_reentrant_initialization(THREAD),
 660          "HotSpotJVMCIRuntime initialization should only be triggered through JVMCI initialization");
 661 
 662   Handle result = callStatic("jdk/vm/ci/hotspot/HotSpotJVMCIRuntime",
 663                              "runtime",
 664                              "()Ljdk/vm/ci/hotspot/HotSpotJVMCIRuntime;", NULL, CHECK);
 665   objArrayOop trivial_prefixes = HotSpotJVMCIRuntime::trivialPrefixes(result);
 666   if (trivial_prefixes != NULL) {
 667     char** prefixes = NEW_C_HEAP_ARRAY(char*, trivial_prefixes->length(), mtCompiler);
 668     for (int i = 0; i < trivial_prefixes->length(); i++) {
 669       oop str = trivial_prefixes->obj_at(i);
 670       if (str == NULL) {
 671         THROW(vmSymbols::java_lang_NullPointerException());
 672       } else {
 673         prefixes[i] = strdup(java_lang_String::as_utf8_string(str));
 674       }
 675     }
 676     _trivial_prefixes = prefixes;
 677     _trivial_prefixes_count = trivial_prefixes->length();
 678   }
 679   int adjustment = HotSpotJVMCIRuntime::compilationLevelAdjustment(result);
 680   assert(adjustment >= JVMCIRuntime::none &&
 681          adjustment <= JVMCIRuntime::by_full_signature,
 682          "compilation level adjustment out of bounds");
 683   _comp_level_adjustment = (CompLevelAdjustment) adjustment;
 684   _HotSpotJVMCIRuntime_initialized = true;
 685   _HotSpotJVMCIRuntime_instance = JNIHandles::make_global(result);
 686 }
 687 
 688 void JVMCIRuntime::initialize_JVMCI(TRAPS) {
 689   if (JNIHandles::resolve(_HotSpotJVMCIRuntime_instance) == NULL) {
 690     callStatic("jdk/vm/ci/runtime/JVMCI",
 691                "getRuntime",
 692                "()Ljdk/vm/ci/runtime/JVMCIRuntime;", NULL, CHECK);
 693   }
 694   assert(_HotSpotJVMCIRuntime_initialized == true, "what?");
 695 }
 696 
 697 bool JVMCIRuntime::can_initialize_JVMCI() {
 698   // Initializing JVMCI requires the module system to be initialized past phase 3.
 699   // The JVMCI API itself isn't available until phase 2 and ServiceLoader (which
 700   // JVMCI initialization requires) isn't usable until after phase 3. Testing
 701   // whether the system loader is initialized satisfies all these invariants.
 702   if (SystemDictionary::java_system_loader() == NULL) {
 703     return false;
 704   }
 705   assert(Universe::is_module_initialized(), "must be");
 706   return true;
 707 }
 708 
 709 void JVMCIRuntime::initialize_well_known_classes(TRAPS) {
 710   if (JVMCIRuntime::_well_known_classes_initialized == false) {
 711     guarantee(can_initialize_JVMCI(), "VM is not yet sufficiently booted to initialize JVMCI");
 712     SystemDictionary::WKID scan = SystemDictionary::FIRST_JVMCI_WKID;
 713     SystemDictionary::initialize_wk_klasses_through(SystemDictionary::LAST_JVMCI_WKID, scan, CHECK);
 714     JVMCIJavaClasses::compute_offsets(CHECK);
 715     JVMCIRuntime::_well_known_classes_initialized = true;
 716   }
 717 }
 718 
 719 void JVMCIRuntime::metadata_do(void f(Metadata*)) {
 720   // For simplicity, the existence of HotSpotJVMCIMetaAccessContext in
 721   // the SystemDictionary well known classes should ensure the other
 722   // classes have already been loaded, so make sure their order in the
 723   // table enforces that.
 724   assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedJavaMethodImpl) <
 725          SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
 726   assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotConstantPool) <
 727          SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
 728   assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedObjectTypeImpl) <
 729          SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
 730 
 731   if (HotSpotJVMCIMetaAccessContext::klass() == NULL ||
 732       !HotSpotJVMCIMetaAccessContext::klass()->is_linked()) {
 733     // Nothing could be registered yet
 734     return;
 735   }
 736 
 737   // WeakReference<HotSpotJVMCIMetaAccessContext>[]
 738   objArrayOop allContexts = HotSpotJVMCIMetaAccessContext::allContexts();
 739   if (allContexts == NULL) {
 740     return;
 741   }
 742 
 743   // These must be loaded at this point but the linking state doesn't matter.
 744   assert(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass() != NULL, "must be loaded");
 745   assert(SystemDictionary::HotSpotConstantPool_klass() != NULL, "must be loaded");
 746   assert(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass() != NULL, "must be loaded");
 747 
 748   for (int i = 0; i < allContexts->length(); i++) {
 749     oop ref = allContexts->obj_at(i);
 750     if (ref != NULL) {
 751       oop referent = java_lang_ref_Reference::referent(ref);
 752       if (referent != NULL) {
 753         // Chunked Object[] with last element pointing to next chunk
 754         objArrayOop metadataRoots = HotSpotJVMCIMetaAccessContext::metadataRoots(referent);
 755         while (metadataRoots != NULL) {
 756           for (int typeIndex = 0; typeIndex < metadataRoots->length() - 1; typeIndex++) {
 757             oop reference = metadataRoots->obj_at(typeIndex);
 758             if (reference == NULL) {
 759               continue;
 760             }
 761             oop metadataRoot = java_lang_ref_Reference::referent(reference);
 762             if (metadataRoot == NULL) {
 763               continue;
 764             }
 765             if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass())) {
 766               Method* method = CompilerToVM::asMethod(metadataRoot);
 767               f(method);
 768             } else if (metadataRoot->is_a(SystemDictionary::HotSpotConstantPool_klass())) {
 769               ConstantPool* constantPool = CompilerToVM::asConstantPool(metadataRoot);
 770               f(constantPool);
 771             } else if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass())) {
 772               Klass* klass = CompilerToVM::asKlass(metadataRoot);
 773               f(klass);
 774             } else {
 775               metadataRoot->print();
 776               ShouldNotReachHere();
 777             }
 778           }
 779           metadataRoots = (objArrayOop)metadataRoots->obj_at(metadataRoots->length() - 1);
 780           assert(metadataRoots == NULL || metadataRoots->is_objArray(), "wrong type");
 781         }
 782       }
 783     }
 784   }
 785 }
 786 
 787 // private static void CompilerToVM.registerNatives()
 788 JVM_ENTRY(void, JVM_RegisterJVMCINatives(JNIEnv *env, jclass c2vmClass))
 789   if (!EnableJVMCI) {
 790     THROW_MSG(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled");
 791   }
 792 
 793 #ifdef _LP64
 794 #ifndef SPARC
 795   uintptr_t heap_end = (uintptr_t) Universe::heap()->reserved_region().end();
 796   uintptr_t allocation_end = heap_end + ((uintptr_t)16) * 1024 * 1024 * 1024;
 797   guarantee(heap_end < allocation_end, "heap end too close to end of address space (might lead to erroneous TLAB allocations)");
 798 #endif // !SPARC
 799 #else
 800   fatal("check TLAB allocation code for address space conflicts");
 801 #endif // _LP64
 802 
 803   JVMCIRuntime::initialize_well_known_classes(CHECK);
 804 
 805   {
 806     ThreadToNativeFromVM trans(thread);
 807     env->RegisterNatives(c2vmClass, CompilerToVM::methods, CompilerToVM::methods_count());
 808   }
 809 JVM_END
 810 
 811 void JVMCIRuntime::shutdown(TRAPS) {
 812   if (_HotSpotJVMCIRuntime_instance != NULL) {
 813     _shutdown_called = true;
 814     HandleMark hm(THREAD);
 815     Handle receiver = get_HotSpotJVMCIRuntime(CHECK);
 816     JavaValue result(T_VOID);
 817     JavaCallArguments args;
 818     args.push_oop(receiver);
 819     JavaCalls::call_special(&result, receiver->klass(), vmSymbols::shutdown_method_name(), vmSymbols::void_method_signature(), &args, CHECK);
 820   }
 821 }
 822 
 823 CompLevel JVMCIRuntime::adjust_comp_level_inner(const methodHandle& method, bool is_osr, CompLevel level, JavaThread* thread) {
 824   JVMCICompiler* compiler = JVMCICompiler::instance(false, thread);
 825   if (compiler != NULL && compiler->is_bootstrapping()) {
 826     return level;
 827   }
 828   if (!is_HotSpotJVMCIRuntime_initialized() || !_comp_level_adjustment) {
 829     // JVMCI cannot participate in compilation scheduling until
 830     // JVMCI is initialized and indicates it wants to participate.
 831     return level;
 832   }
 833 
 834 #define CHECK_RETURN THREAD); \
 835 if (HAS_PENDING_EXCEPTION) { \
 836   Handle exception(THREAD, PENDING_EXCEPTION); \
 837   CLEAR_PENDING_EXCEPTION; \
 838 \
 839   java_lang_Throwable::java_printStackTrace(exception, THREAD); \
 840   if (HAS_PENDING_EXCEPTION) { \
 841     CLEAR_PENDING_EXCEPTION; \
 842   } \
 843   return level; \
 844 } \
 845 (void)(0
 846 
 847 
 848   Thread* THREAD = thread;
 849   HandleMark hm;
 850   Handle receiver = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK_RETURN);
 851   Handle name;
 852   Handle sig;
 853   if (_comp_level_adjustment == JVMCIRuntime::by_full_signature) {
 854     name = java_lang_String::create_from_symbol(method->name(), CHECK_RETURN);
 855     sig = java_lang_String::create_from_symbol(method->signature(), CHECK_RETURN);
 856   } else {
 857     name = Handle();
 858     sig = Handle();
 859   }
 860 
 861   JavaValue result(T_INT);
 862   JavaCallArguments args;
 863   args.push_oop(receiver);
 864   args.push_oop(Handle(THREAD, method->method_holder()->java_mirror()));
 865   args.push_oop(name);
 866   args.push_oop(sig);
 867   args.push_int(is_osr);
 868   args.push_int(level);
 869   JavaCalls::call_special(&result, receiver->klass(), vmSymbols::adjustCompilationLevel_name(),
 870                           vmSymbols::adjustCompilationLevel_signature(), &args, CHECK_RETURN);
 871 
 872   int comp_level = result.get_jint();
 873   if (comp_level < CompLevel_none || comp_level > CompLevel_full_optimization) {
 874     assert(false, "compilation level out of bounds");
 875     return level;
 876   }
 877   return (CompLevel) comp_level;
 878 #undef CHECK_RETURN
 879 }
 880 
 881 void JVMCIRuntime::bootstrap_finished(TRAPS) {
 882   HandleMark hm(THREAD);
 883   Handle receiver = get_HotSpotJVMCIRuntime(CHECK);
 884   JavaValue result(T_VOID);
 885   JavaCallArguments args;
 886   args.push_oop(receiver);
 887   JavaCalls::call_special(&result, receiver->klass(), vmSymbols::bootstrapFinished_method_name(), vmSymbols::void_method_signature(), &args, CHECK);
 888 }
 889 
 890 bool JVMCIRuntime::treat_as_trivial(Method* method) {
 891   if (_HotSpotJVMCIRuntime_initialized) {
 892     for (int i = 0; i < _trivial_prefixes_count; i++) {
 893       if (method->method_holder()->name()->starts_with(_trivial_prefixes[i])) {
 894         return true;
 895       }
 896     }
 897   }
 898   return false;
 899 }