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