1 /*
   2  * Copyright (c) 2012, 2016, 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 "asm/codeBuffer.hpp"
  26 #include "classfile/javaClasses.inline.hpp"
  27 #include "code/codeCache.hpp"
  28 #include "compiler/compileBroker.hpp"
  29 #include "compiler/disassembler.hpp"
  30 #include "jvmci/jvmciRuntime.hpp"
  31 #include "jvmci/jvmciCompilerToVM.hpp"
  32 #include "jvmci/jvmciCompiler.hpp"
  33 #include "jvmci/jvmciJavaClasses.hpp"
  34 #include "jvmci/jvmciEnv.hpp"
  35 #include "logging/log.hpp"
  36 #include "memory/oopFactory.hpp"
  37 #include "memory/resourceArea.hpp"
  38 #include "oops/oop.inline.hpp"
  39 #include "oops/objArrayOop.inline.hpp"
  40 #include "prims/jvm.h"
  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 
  48 #if defined(_MSC_VER)
  49 #define strtoll _strtoi64
  50 #endif
  51 
  52 jobject JVMCIRuntime::_HotSpotJVMCIRuntime_instance = NULL;
  53 bool JVMCIRuntime::_HotSpotJVMCIRuntime_initialized = false;
  54 bool JVMCIRuntime::_well_known_classes_initialized = false;
  55 const char* JVMCIRuntime::_compiler = NULL;
  56 int JVMCIRuntime::_trivial_prefixes_count = 0;
  57 char** JVMCIRuntime::_trivial_prefixes = NULL;
  58 bool JVMCIRuntime::_shutdown_called = false;
  59 
  60 BasicType JVMCIRuntime::kindToBasicType(Handle kind, TRAPS) {
  61   if (kind.is_null()) {
  62     THROW_(vmSymbols::java_lang_NullPointerException(), T_ILLEGAL);
  63   }
  64   jchar ch = JavaKind::typeChar(kind);
  65   switch(ch) {
  66     case 'z': return T_BOOLEAN;
  67     case 'b': return T_BYTE;
  68     case 's': return T_SHORT;
  69     case 'c': return T_CHAR;
  70     case 'i': return T_INT;
  71     case 'f': return T_FLOAT;
  72     case 'j': return T_LONG;
  73     case 'd': return T_DOUBLE;
  74     case 'a': return T_OBJECT;
  75     case '-': return T_ILLEGAL;
  76     default:
  77       JVMCI_ERROR_(T_ILLEGAL, "unexpected Kind: %c", ch);
  78   }
  79 }
  80 
  81 // Simple helper to see if the caller of a runtime stub which
  82 // entered the VM has been deoptimized
  83 
  84 static bool caller_is_deopted() {
  85   JavaThread* thread = JavaThread::current();
  86   RegisterMap reg_map(thread, false);
  87   frame runtime_frame = thread->last_frame();
  88   frame caller_frame = runtime_frame.sender(&reg_map);
  89   assert(caller_frame.is_compiled_frame(), "must be compiled");
  90   return caller_frame.is_deoptimized_frame();
  91 }
  92 
  93 // Stress deoptimization
  94 static void deopt_caller() {
  95   if ( !caller_is_deopted()) {
  96     JavaThread* thread = JavaThread::current();
  97     RegisterMap reg_map(thread, false);
  98     frame runtime_frame = thread->last_frame();
  99     frame caller_frame = runtime_frame.sender(&reg_map);
 100     Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
 101     assert(caller_is_deopted(), "Must be deoptimized");
 102   }
 103 }
 104 
 105 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_instance(JavaThread* thread, Klass* klass))
 106   JRT_BLOCK;
 107   assert(klass->is_klass(), "not a class");
 108   instanceKlassHandle h(thread, klass);
 109   h->check_valid_for_instantiation(true, CHECK);
 110   // make sure klass is initialized
 111   h->initialize(CHECK);
 112   // allocate instance and return via TLS
 113   oop obj = h->allocate_instance(CHECK);
 114   thread->set_vm_result(obj);
 115   JRT_BLOCK_END;
 116 
 117   if (ReduceInitialCardMarks) {
 118     new_store_pre_barrier(thread);
 119   }
 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     Klass* elem_klass = ObjArrayKlass::cast(array_klass)->element_klass();
 134     obj = oopFactory::new_objArray(elem_klass, length, CHECK);
 135   }
 136   thread->set_vm_result(obj);
 137   // This is pretty rare but this runtime patch is stressful to deoptimization
 138   // if we deoptimize here so force a deopt to stress the path.
 139   if (DeoptimizeALot) {
 140     static int deopts = 0;
 141     // Alternate between deoptimizing and raising an error (which will also cause a deopt)
 142     if (deopts++ % 2 == 0) {
 143       ResourceMark rm(THREAD);
 144       THROW(vmSymbols::java_lang_OutOfMemoryError());
 145     } else {
 146       deopt_caller();
 147     }
 148   }
 149   JRT_BLOCK_END;
 150 
 151   if (ReduceInitialCardMarks) {
 152     new_store_pre_barrier(thread);
 153   }
 154 JRT_END
 155 
 156 void JVMCIRuntime::new_store_pre_barrier(JavaThread* thread) {
 157   // After any safepoint, just before going back to compiled code,
 158   // we inform the GC that we will be doing initializing writes to
 159   // this object in the future without emitting card-marks, so
 160   // GC may take any compensating steps.
 161   // NOTE: Keep this code consistent with GraphKit::store_barrier.
 162 
 163   oop new_obj = thread->vm_result();
 164   if (new_obj == NULL)  return;
 165 
 166   assert(Universe::heap()->can_elide_tlab_store_barriers(),
 167          "compiler must check this first");
 168   // GC may decide to give back a safer copy of new_obj.
 169   new_obj = Universe::heap()->new_store_pre_barrier(thread, new_obj);
 170   thread->set_vm_result(new_obj);
 171 }
 172 
 173 JRT_ENTRY(void, JVMCIRuntime::new_multi_array(JavaThread* thread, Klass* klass, int rank, jint* dims))
 174   assert(klass->is_klass(), "not a class");
 175   assert(rank >= 1, "rank must be nonzero");
 176   oop obj = ArrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK);
 177   thread->set_vm_result(obj);
 178 JRT_END
 179 
 180 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_array(JavaThread* thread, oopDesc* element_mirror, jint length))
 181   oop obj = Reflection::reflect_new_array(element_mirror, length, CHECK);
 182   thread->set_vm_result(obj);
 183 JRT_END
 184 
 185 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_instance(JavaThread* thread, oopDesc* type_mirror))
 186   instanceKlassHandle klass(THREAD, java_lang_Class::as_Klass(type_mirror));
 187 
 188   if (klass == NULL) {
 189     ResourceMark rm(THREAD);
 190     THROW(vmSymbols::java_lang_InstantiationException());
 191   }
 192 
 193   // Create new instance (the receiver)
 194   klass->check_valid_for_instantiation(false, CHECK);
 195 
 196   // Make sure klass gets initialized
 197   klass->initialize(CHECK);
 198 
 199   oop obj = klass->allocate_instance(CHECK);
 200   thread->set_vm_result(obj);
 201 JRT_END
 202 
 203 extern void vm_exit(int code);
 204 
 205 // Enter this method from compiled code handler below. This is where we transition
 206 // to VM mode. This is done as a helper routine so that the method called directly
 207 // from compiled code does not have to transition to VM. This allows the entry
 208 // method to see if the nmethod that we have just looked up a handler for has
 209 // been deoptimized while we were in the vm. This simplifies the assembly code
 210 // cpu directories.
 211 //
 212 // We are entering here from exception stub (via the entry method below)
 213 // If there is a compiled exception handler in this method, we will continue there;
 214 // otherwise we will unwind the stack and continue at the caller of top frame method
 215 // Note: we enter in Java using a special JRT wrapper. This wrapper allows us to
 216 // control the area where we can allow a safepoint. After we exit the safepoint area we can
 217 // check to see if the handler we are going to return is now in a nmethod that has
 218 // been deoptimized. If that is the case we return the deopt blob
 219 // unpack_with_exception entry instead. This makes life for the exception blob easier
 220 // because making that same check and diverting is painful from assembly language.
 221 JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* thread, oopDesc* ex, address pc, nmethod*& nm))
 222   // Reset method handle flag.
 223   thread->set_is_method_handle_return(false);
 224 
 225   Handle exception(thread, ex);
 226   nm = CodeCache::find_nmethod(pc);
 227   assert(nm != NULL, "this is not a compiled method");
 228   // Adjust the pc as needed/
 229   if (nm->is_deopt_pc(pc)) {
 230     RegisterMap map(thread, false);
 231     frame exception_frame = thread->last_frame().sender(&map);
 232     // if the frame isn't deopted then pc must not correspond to the caller of last_frame
 233     assert(exception_frame.is_deoptimized_frame(), "must be deopted");
 234     pc = exception_frame.pc();
 235   }
 236 #ifdef ASSERT
 237   assert(exception.not_null(), "NULL exceptions should be handled by throw_exception");
 238   assert(exception->is_oop(), "just checking");
 239   // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
 240   if (!(exception->is_a(SystemDictionary::Throwable_klass()))) {
 241     if (ExitVMOnVerifyError) vm_exit(-1);
 242     ShouldNotReachHere();
 243   }
 244 #endif
 245 
 246   // Check the stack guard pages and reenable them if necessary and there is
 247   // enough space on the stack to do so.  Use fast exceptions only if the guard
 248   // pages are enabled.
 249   bool guard_pages_enabled = thread->stack_guards_enabled();
 250   if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack();
 251 
 252   if (JvmtiExport::can_post_on_exceptions()) {
 253     // To ensure correct notification of exception catches and throws
 254     // we have to deoptimize here.  If we attempted to notify the
 255     // catches and throws during this exception lookup it's possible
 256     // we could deoptimize on the way out of the VM and end back in
 257     // the interpreter at the throw site.  This would result in double
 258     // notifications since the interpreter would also notify about
 259     // these same catches and throws as it unwound the frame.
 260 
 261     RegisterMap reg_map(thread);
 262     frame stub_frame = thread->last_frame();
 263     frame caller_frame = stub_frame.sender(&reg_map);
 264 
 265     // We don't really want to deoptimize the nmethod itself since we
 266     // can actually continue in the exception handler ourselves but I
 267     // don't see an easy way to have the desired effect.
 268     Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
 269     assert(caller_is_deopted(), "Must be deoptimized");
 270 
 271     return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
 272   }
 273 
 274   // ExceptionCache is used only for exceptions at call sites and not for implicit exceptions
 275   if (guard_pages_enabled) {
 276     address fast_continuation = nm->handler_for_exception_and_pc(exception, pc);
 277     if (fast_continuation != NULL) {
 278       // Set flag if return address is a method handle call site.
 279       thread->set_is_method_handle_return(nm->is_method_handle_return(pc));
 280       return fast_continuation;
 281     }
 282   }
 283 
 284   // If the stack guard pages are enabled, check whether there is a handler in
 285   // the current method.  Otherwise (guard pages disabled), force an unwind and
 286   // skip the exception cache update (i.e., just leave continuation==NULL).
 287   address continuation = NULL;
 288   if (guard_pages_enabled) {
 289 
 290     // New exception handling mechanism can support inlined methods
 291     // with exception handlers since the mappings are from PC to PC
 292 
 293     // debugging support
 294     // tracing
 295     if (log_is_enabled(Info, exceptions)) {
 296       ResourceMark rm;
 297       stringStream tempst;
 298       tempst.print("compiled method <%s>\n"
 299                    " at PC" INTPTR_FORMAT " for thread " INTPTR_FORMAT,
 300                    nm->method()->print_value_string(), p2i(pc), p2i(thread));
 301       Exceptions::log_exception(exception, tempst);
 302     }
 303     // for AbortVMOnException flag
 304     NOT_PRODUCT(Exceptions::debug_check_abort(exception));
 305 
 306     // Clear out the exception oop and pc since looking up an
 307     // exception handler can cause class loading, which might throw an
 308     // exception and those fields are expected to be clear during
 309     // normal bytecode execution.
 310     thread->clear_exception_oop_and_pc();
 311 
 312     continuation = SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, false, false);
 313     // If an exception was thrown during exception dispatch, the exception oop may have changed
 314     thread->set_exception_oop(exception());
 315     thread->set_exception_pc(pc);
 316 
 317     // the exception cache is used only by non-implicit exceptions
 318     if (continuation != NULL && !SharedRuntime::deopt_blob()->contains(continuation)) {
 319       nm->add_handler_for_exception_and_pc(exception, pc, continuation);
 320     }
 321   }
 322 
 323   // Set flag if return address is a method handle call site.
 324   thread->set_is_method_handle_return(nm->is_method_handle_return(pc));
 325 
 326   if (log_is_enabled(Info, exceptions)) {
 327     ResourceMark rm;
 328     log_info(exceptions)("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT
 329                          " for exception thrown at PC " PTR_FORMAT,
 330                          p2i(thread), p2i(continuation), p2i(pc));
 331   }
 332 
 333   return continuation;
 334 JRT_END
 335 
 336 // Enter this method from compiled code only if there is a Java exception handler
 337 // in the method handling the exception.
 338 // We are entering here from exception stub. We don't do a normal VM transition here.
 339 // We do it in a helper. This is so we can check to see if the nmethod we have just
 340 // searched for an exception handler has been deoptimized in the meantime.
 341 address JVMCIRuntime::exception_handler_for_pc(JavaThread* thread) {
 342   oop exception = thread->exception_oop();
 343   address pc = thread->exception_pc();
 344   // Still in Java mode
 345   DEBUG_ONLY(ResetNoHandleMark rnhm);
 346   nmethod* nm = NULL;
 347   address continuation = NULL;
 348   {
 349     // Enter VM mode by calling the helper
 350     ResetNoHandleMark rnhm;
 351     continuation = exception_handler_for_pc_helper(thread, exception, pc, nm);
 352   }
 353   // Back in JAVA, use no oops DON'T safepoint
 354 
 355   // Now check to see if the compiled method we were called from is now deoptimized.
 356   // If so we must return to the deopt blob and deoptimize the nmethod
 357   if (nm != NULL && caller_is_deopted()) {
 358     continuation = SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
 359   }
 360 
 361   assert(continuation != NULL, "no handler found");
 362   return continuation;
 363 }
 364 
 365 JRT_ENTRY(void, JVMCIRuntime::create_null_exception(JavaThread* thread))
 366   SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException());
 367   thread->set_vm_result(PENDING_EXCEPTION);
 368   CLEAR_PENDING_EXCEPTION;
 369 JRT_END
 370 
 371 JRT_ENTRY(void, JVMCIRuntime::create_out_of_bounds_exception(JavaThread* thread, jint index))
 372   char message[jintAsStringSize];
 373   sprintf(message, "%d", index);
 374   SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), message);
 375   thread->set_vm_result(PENDING_EXCEPTION);
 376   CLEAR_PENDING_EXCEPTION;
 377 JRT_END
 378 
 379 JRT_ENTRY_NO_ASYNC(void, JVMCIRuntime::monitorenter(JavaThread* thread, oopDesc* obj, BasicLock* lock))
 380   IF_TRACE_jvmci_3 {
 381     char type[O_BUFLEN];
 382     obj->klass()->name()->as_C_string(type, O_BUFLEN);
 383     markOop mark = obj->mark();
 384     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));
 385     tty->flush();
 386   }
 387 #ifdef ASSERT
 388   if (PrintBiasedLockingStatistics) {
 389     Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
 390   }
 391 #endif
 392   Handle h_obj(thread, obj);
 393   assert(h_obj()->is_oop(), "must be NULL or an object");
 394   if (UseBiasedLocking) {
 395     // Retry fast entry if bias is revoked to avoid unnecessary inflation
 396     ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK);
 397   } else {
 398     if (JVMCIUseFastLocking) {
 399       // When using fast locking, the compiled code has already tried the fast case
 400       ObjectSynchronizer::slow_enter(h_obj, lock, THREAD);
 401     } else {
 402       ObjectSynchronizer::fast_enter(h_obj, lock, false, THREAD);
 403     }
 404   }
 405   TRACE_jvmci_3("%s: exiting locking slow with obj=" INTPTR_FORMAT, thread->name(), p2i(obj));
 406 JRT_END
 407 
 408 JRT_LEAF(void, JVMCIRuntime::monitorexit(JavaThread* thread, oopDesc* obj, BasicLock* lock))
 409   assert(thread == JavaThread::current(), "threads must correspond");
 410   assert(thread->last_Java_sp(), "last_Java_sp must be set");
 411   // monitorexit is non-blocking (leaf routine) => no exceptions can be thrown
 412   EXCEPTION_MARK;
 413 
 414 #ifdef DEBUG
 415   if (!obj->is_oop()) {
 416     ResetNoHandleMark rhm;
 417     nmethod* method = thread->last_frame().cb()->as_nmethod_or_null();
 418     if (method != NULL) {
 419       tty->print_cr("ERROR in monitorexit in method %s wrong obj " INTPTR_FORMAT, method->name(), p2i(obj));
 420     }
 421     thread->print_stack_on(tty);
 422     assert(false, "invalid lock object pointer dected");
 423   }
 424 #endif
 425 
 426   if (JVMCIUseFastLocking) {
 427     // When using fast locking, the compiled code has already tried the fast case
 428     ObjectSynchronizer::slow_exit(obj, lock, THREAD);
 429   } else {
 430     ObjectSynchronizer::fast_exit(obj, lock, THREAD);
 431   }
 432   IF_TRACE_jvmci_3 {
 433     char type[O_BUFLEN];
 434     obj->klass()->name()->as_C_string(type, O_BUFLEN);
 435     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));
 436     tty->flush();
 437   }
 438 JRT_END
 439 
 440 JRT_LEAF(void, JVMCIRuntime::log_object(JavaThread* thread, oopDesc* obj, bool as_string, bool newline))
 441   ttyLocker ttyl;
 442 
 443   if (obj == NULL) {
 444     tty->print("NULL");
 445   } else if (obj->is_oop_or_null(true) && (!as_string || !java_lang_String::is_instance(obj))) {
 446     if (obj->is_oop_or_null(true)) {
 447       char buf[O_BUFLEN];
 448       tty->print("%s@" INTPTR_FORMAT, obj->klass()->name()->as_C_string(buf, O_BUFLEN), p2i(obj));
 449     } else {
 450       tty->print(INTPTR_FORMAT, p2i(obj));
 451     }
 452   } else {
 453     ResourceMark rm;
 454     assert(obj != NULL && java_lang_String::is_instance(obj), "must be");
 455     char *buf = java_lang_String::as_utf8_string(obj);
 456     tty->print_raw(buf);
 457   }
 458   if (newline) {
 459     tty->cr();
 460   }
 461 JRT_END
 462 
 463 JRT_LEAF(void, JVMCIRuntime::write_barrier_pre(JavaThread* thread, oopDesc* obj))
 464   thread->satb_mark_queue().enqueue(obj);
 465 JRT_END
 466 
 467 JRT_LEAF(void, JVMCIRuntime::write_barrier_post(JavaThread* thread, void* card_addr))
 468   thread->dirty_card_queue().enqueue(card_addr);
 469 JRT_END
 470 
 471 JRT_LEAF(jboolean, JVMCIRuntime::validate_object(JavaThread* thread, oopDesc* parent, oopDesc* child))
 472   bool ret = true;
 473   if(!Universe::heap()->is_in_closed_subset(parent)) {
 474     tty->print_cr("Parent Object " INTPTR_FORMAT " not in heap", p2i(parent));
 475     parent->print();
 476     ret=false;
 477   }
 478   if(!Universe::heap()->is_in_closed_subset(child)) {
 479     tty->print_cr("Child Object " INTPTR_FORMAT " not in heap", p2i(child));
 480     child->print();
 481     ret=false;
 482   }
 483   return (jint)ret;
 484 JRT_END
 485 
 486 JRT_ENTRY(void, JVMCIRuntime::vm_error(JavaThread* thread, jlong where, jlong format, jlong value))
 487   ResourceMark rm;
 488   const char *error_msg = where == 0L ? "<internal JVMCI error>" : (char*) (address) where;
 489   char *detail_msg = NULL;
 490   if (format != 0L) {
 491     const char* buf = (char*) (address) format;
 492     size_t detail_msg_length = strlen(buf) * 2;
 493     detail_msg = (char *) NEW_RESOURCE_ARRAY(u_char, detail_msg_length);
 494     jio_snprintf(detail_msg, detail_msg_length, buf, value);
 495     report_vm_error(__FILE__, __LINE__, error_msg, "%s", detail_msg);
 496   } else {
 497     report_vm_error(__FILE__, __LINE__, error_msg);
 498   }
 499 JRT_END
 500 
 501 JRT_LEAF(oopDesc*, JVMCIRuntime::load_and_clear_exception(JavaThread* thread))
 502   oop exception = thread->exception_oop();
 503   assert(exception != NULL, "npe");
 504   thread->set_exception_oop(NULL);
 505   thread->set_exception_pc(0);
 506   return exception;
 507 JRT_END
 508 
 509 PRAGMA_DIAG_PUSH
 510 PRAGMA_FORMAT_NONLITERAL_IGNORED
 511 JRT_LEAF(void, JVMCIRuntime::log_printf(JavaThread* thread, oopDesc* format, jlong v1, jlong v2, jlong v3))
 512   ResourceMark rm;
 513   assert(format != NULL && java_lang_String::is_instance(format), "must be");
 514   char *buf = java_lang_String::as_utf8_string(format);
 515   tty->print((const char*)buf, v1, v2, v3);
 516 JRT_END
 517 PRAGMA_DIAG_POP
 518 
 519 static void decipher(jlong v, bool ignoreZero) {
 520   if (v != 0 || !ignoreZero) {
 521     void* p = (void *)(address) v;
 522     CodeBlob* cb = CodeCache::find_blob(p);
 523     if (cb) {
 524       if (cb->is_nmethod()) {
 525         char buf[O_BUFLEN];
 526         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()));
 527         return;
 528       }
 529       cb->print_value_on(tty);
 530       return;
 531     }
 532     if (Universe::heap()->is_in(p)) {
 533       oop obj = oop(p);
 534       obj->print_value_on(tty);
 535       return;
 536     }
 537     tty->print(INTPTR_FORMAT " [long: " JLONG_FORMAT ", double %lf, char %c]",p2i((void *)v), (jlong)v, (jdouble)v, (char)v);
 538   }
 539 }
 540 
 541 PRAGMA_DIAG_PUSH
 542 PRAGMA_FORMAT_NONLITERAL_IGNORED
 543 JRT_LEAF(void, JVMCIRuntime::vm_message(jboolean vmError, jlong format, jlong v1, jlong v2, jlong v3))
 544   ResourceMark rm;
 545   const char *buf = (const char*) (address) format;
 546   if (vmError) {
 547     if (buf != NULL) {
 548       fatal(buf, v1, v2, v3);
 549     } else {
 550       fatal("<anonymous error>");
 551     }
 552   } else if (buf != NULL) {
 553     tty->print(buf, v1, v2, v3);
 554   } else {
 555     assert(v2 == 0, "v2 != 0");
 556     assert(v3 == 0, "v3 != 0");
 557     decipher(v1, false);
 558   }
 559 JRT_END
 560 PRAGMA_DIAG_POP
 561 
 562 JRT_LEAF(void, JVMCIRuntime::log_primitive(JavaThread* thread, jchar typeChar, jlong value, jboolean newline))
 563   union {
 564       jlong l;
 565       jdouble d;
 566       jfloat f;
 567   } uu;
 568   uu.l = value;
 569   switch (typeChar) {
 570     case 'z': tty->print(value == 0 ? "false" : "true"); break;
 571     case 'b': tty->print("%d", (jbyte) value); break;
 572     case 'c': tty->print("%c", (jchar) value); break;
 573     case 's': tty->print("%d", (jshort) value); break;
 574     case 'i': tty->print("%d", (jint) value); break;
 575     case 'f': tty->print("%f", uu.f); break;
 576     case 'j': tty->print(JLONG_FORMAT, value); break;
 577     case 'd': tty->print("%lf", uu.d); break;
 578     default: assert(false, "unknown typeChar"); break;
 579   }
 580   if (newline) {
 581     tty->cr();
 582   }
 583 JRT_END
 584 
 585 JRT_ENTRY(jint, JVMCIRuntime::identity_hash_code(JavaThread* thread, oopDesc* obj))
 586   return (jint) obj->identity_hash();
 587 JRT_END
 588 
 589 JRT_ENTRY(jboolean, JVMCIRuntime::thread_is_interrupted(JavaThread* thread, oopDesc* receiver, jboolean clear_interrupted))
 590   // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
 591   // This locking requires thread_in_vm which is why this method cannot be JRT_LEAF.
 592   Handle receiverHandle(thread, receiver);
 593   MutexLockerEx ml(thread->threadObj() == (void*)receiver ? NULL : Threads_lock);
 594   JavaThread* receiverThread = java_lang_Thread::thread(receiverHandle());
 595   if (receiverThread == NULL) {
 596     // The other thread may exit during this process, which is ok so return false.
 597     return JNI_FALSE;
 598   } else {
 599     return (jint) Thread::is_interrupted(receiverThread, clear_interrupted != 0);
 600   }
 601 JRT_END
 602 
 603 JRT_ENTRY(jint, JVMCIRuntime::test_deoptimize_call_int(JavaThread* thread, int value))
 604   deopt_caller();
 605   return value;
 606 JRT_END
 607 
 608 // private static JVMCIRuntime JVMCI.initializeRuntime()
 609 JVM_ENTRY(jobject, JVM_GetJVMCIRuntime(JNIEnv *env, jclass c))
 610   if (!EnableJVMCI) {
 611     THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled")
 612   }
 613   JVMCIRuntime::initialize_HotSpotJVMCIRuntime(CHECK_NULL);
 614   jobject ret = JVMCIRuntime::get_HotSpotJVMCIRuntime_jobject(CHECK_NULL);
 615   return ret;
 616 JVM_END
 617 
 618 Handle JVMCIRuntime::callStatic(const char* className, const char* methodName, const char* signature, JavaCallArguments* args, TRAPS) {
 619   guarantee(!_HotSpotJVMCIRuntime_initialized, "cannot reinitialize HotSpotJVMCIRuntime");
 620 
 621   TempNewSymbol name = SymbolTable::new_symbol(className, CHECK_(Handle()));
 622   KlassHandle klass = SystemDictionary::resolve_or_fail(name, true, CHECK_(Handle()));
 623   TempNewSymbol runtime = SymbolTable::new_symbol(methodName, CHECK_(Handle()));
 624   TempNewSymbol sig = SymbolTable::new_symbol(signature, CHECK_(Handle()));
 625   JavaValue result(T_OBJECT);
 626   if (args == NULL) {
 627     JavaCalls::call_static(&result, klass, runtime, sig, CHECK_(Handle()));
 628   } else {
 629     JavaCalls::call_static(&result, klass, runtime, sig, args, CHECK_(Handle()));
 630   }
 631   return Handle((oop)result.get_jobject());
 632 }
 633 
 634 void JVMCIRuntime::initialize_HotSpotJVMCIRuntime(TRAPS) {
 635   if (JNIHandles::resolve(_HotSpotJVMCIRuntime_instance) == NULL) {
 636     ResourceMark rm;
 637 #ifdef ASSERT
 638     // This should only be called in the context of the JVMCI class being initialized
 639     TempNewSymbol name = SymbolTable::new_symbol("jdk/vm/ci/runtime/JVMCI", CHECK);
 640     Klass* k = SystemDictionary::resolve_or_null(name, CHECK);
 641     instanceKlassHandle klass = InstanceKlass::cast(k);
 642     assert(klass->is_being_initialized() && klass->is_reentrant_initialization(THREAD),
 643            "HotSpotJVMCIRuntime initialization should only be triggered through JVMCI initialization");
 644 #endif
 645 
 646     if (_compiler != NULL) {
 647       JavaCallArguments args;
 648       oop compiler = java_lang_String::create_oop_from_str(_compiler, CHECK);
 649       args.push_oop(compiler);
 650       callStatic("jdk/vm/ci/hotspot/HotSpotJVMCICompilerConfig",
 651                  "selectCompiler",
 652                  "(Ljava/lang/String;)Ljava/lang/Boolean;", &args, CHECK);
 653     }
 654 
 655     Handle result = callStatic("jdk/vm/ci/hotspot/HotSpotJVMCIRuntime",
 656                                "runtime",
 657                                "()Ljdk/vm/ci/hotspot/HotSpotJVMCIRuntime;", NULL, CHECK);
 658     objArrayOop trivial_prefixes = HotSpotJVMCIRuntime::trivialPrefixes(result);
 659     if (trivial_prefixes != NULL) {
 660       char** prefixes = NEW_C_HEAP_ARRAY(char*, trivial_prefixes->length(), mtCompiler);
 661       for (int i = 0; i < trivial_prefixes->length(); i++) {
 662         oop str = trivial_prefixes->obj_at(i);
 663         if (str == NULL) {
 664           THROW(vmSymbols::java_lang_NullPointerException());
 665         } else {
 666           prefixes[i] = strdup(java_lang_String::as_utf8_string(str));
 667         }
 668       }
 669       _trivial_prefixes = prefixes;
 670       _trivial_prefixes_count = trivial_prefixes->length();
 671     }
 672     _HotSpotJVMCIRuntime_initialized = true;
 673     _HotSpotJVMCIRuntime_instance = JNIHandles::make_global(result());
 674   }
 675 }
 676 
 677 void JVMCIRuntime::initialize_JVMCI(TRAPS) {
 678   if (JNIHandles::resolve(_HotSpotJVMCIRuntime_instance) == NULL) {
 679     callStatic("jdk/vm/ci/runtime/JVMCI",
 680                "getRuntime",
 681                "()Ljdk/vm/ci/runtime/JVMCIRuntime;", NULL, CHECK);
 682   }
 683   assert(_HotSpotJVMCIRuntime_initialized == true, "what?");
 684 }
 685 
 686 void JVMCIRuntime::initialize_well_known_classes(TRAPS) {
 687   if (JVMCIRuntime::_well_known_classes_initialized == false) {
 688     SystemDictionary::WKID scan = SystemDictionary::FIRST_JVMCI_WKID;
 689     SystemDictionary::initialize_wk_klasses_through(SystemDictionary::LAST_JVMCI_WKID, scan, CHECK);
 690     JVMCIJavaClasses::compute_offsets(CHECK);
 691     JVMCIRuntime::_well_known_classes_initialized = true;
 692   }
 693 }
 694 
 695 void JVMCIRuntime::metadata_do(void f(Metadata*)) {
 696   // For simplicity, the existence of HotSpotJVMCIMetaAccessContext in
 697   // the SystemDictionary well known classes should ensure the other
 698   // classes have already been loaded, so make sure their order in the
 699   // table enforces that.
 700   assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedJavaMethodImpl) <
 701          SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
 702   assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotConstantPool) <
 703          SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
 704   assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedObjectTypeImpl) <
 705          SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
 706 
 707   if (HotSpotJVMCIMetaAccessContext::klass() == NULL ||
 708       !HotSpotJVMCIMetaAccessContext::klass()->is_linked()) {
 709     // Nothing could be registered yet
 710     return;
 711   }
 712 
 713   // WeakReference<HotSpotJVMCIMetaAccessContext>[]
 714   objArrayOop allContexts = HotSpotJVMCIMetaAccessContext::allContexts();
 715   if (allContexts == NULL) {
 716     return;
 717   }
 718 
 719   // These must be loaded at this point but the linking state doesn't matter.
 720   assert(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass() != NULL, "must be loaded");
 721   assert(SystemDictionary::HotSpotConstantPool_klass() != NULL, "must be loaded");
 722   assert(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass() != NULL, "must be loaded");
 723 
 724   for (int i = 0; i < allContexts->length(); i++) {
 725     oop ref = allContexts->obj_at(i);
 726     if (ref != NULL) {
 727       oop referent = java_lang_ref_Reference::referent(ref);
 728       if (referent != NULL) {
 729         // Chunked Object[] with last element pointing to next chunk
 730         objArrayOop metadataRoots = HotSpotJVMCIMetaAccessContext::metadataRoots(referent);
 731         while (metadataRoots != NULL) {
 732           for (int typeIndex = 0; typeIndex < metadataRoots->length() - 1; typeIndex++) {
 733             oop reference = metadataRoots->obj_at(typeIndex);
 734             if (reference == NULL) {
 735               continue;
 736             }
 737             oop metadataRoot = java_lang_ref_Reference::referent(reference);
 738             if (metadataRoot == NULL) {
 739               continue;
 740             }
 741             if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass())) {
 742               Method* method = CompilerToVM::asMethod(metadataRoot);
 743               f(method);
 744             } else if (metadataRoot->is_a(SystemDictionary::HotSpotConstantPool_klass())) {
 745               ConstantPool* constantPool = CompilerToVM::asConstantPool(metadataRoot);
 746               f(constantPool);
 747             } else if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass())) {
 748               Klass* klass = CompilerToVM::asKlass(metadataRoot);
 749               f(klass);
 750             } else {
 751               metadataRoot->print();
 752               ShouldNotReachHere();
 753             }
 754           }
 755           metadataRoots = (objArrayOop)metadataRoots->obj_at(metadataRoots->length() - 1);
 756           assert(metadataRoots == NULL || metadataRoots->is_objArray(), "wrong type");
 757         }
 758       }
 759     }
 760   }
 761 }
 762 
 763 // private static void CompilerToVM.registerNatives()
 764 JVM_ENTRY(void, JVM_RegisterJVMCINatives(JNIEnv *env, jclass c2vmClass))
 765   if (!EnableJVMCI) {
 766     THROW_MSG(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled");
 767   }
 768 
 769 #ifdef _LP64
 770 #ifndef TARGET_ARCH_sparc
 771   uintptr_t heap_end = (uintptr_t) Universe::heap()->reserved_region().end();
 772   uintptr_t allocation_end = heap_end + ((uintptr_t)16) * 1024 * 1024 * 1024;
 773   guarantee(heap_end < allocation_end, "heap end too close to end of address space (might lead to erroneous TLAB allocations)");
 774 #endif // TARGET_ARCH_sparc
 775 #else
 776   fatal("check TLAB allocation code for address space conflicts");
 777 #endif
 778 
 779   JVMCIRuntime::initialize_well_known_classes(CHECK);
 780 
 781   {
 782     ThreadToNativeFromVM trans(thread);
 783     env->RegisterNatives(c2vmClass, CompilerToVM::methods, CompilerToVM::methods_count());
 784   }
 785 JVM_END
 786 
 787 /**
 788  * Closure for parsing a line from a *.properties file in jre/lib/jvmci/properties.
 789  * The line must match the regular expression "[^=]+=.*". That is one or more
 790  * characters other than '=' followed by '=' followed by zero or more characters.
 791  * Everything before the '=' is the property name and everything after '=' is the value.
 792  * Lines that start with '#' are treated as comments and ignored.
 793  * No special processing of whitespace or any escape characters is performed.
 794  * The last definition of a property "wins" (i.e., it overrides all earlier
 795  * definitions of the property).
 796  */
 797 class JVMCIPropertiesFileClosure : public ParseClosure {
 798   SystemProperty** _plist;
 799 public:
 800   JVMCIPropertiesFileClosure(SystemProperty** plist) : _plist(plist) {}
 801   void do_line(char* line) {
 802     if (line[0] == '#') {
 803       // skip comment
 804       return;
 805     }
 806     size_t len = strlen(line);
 807     char* sep = strchr(line, '=');
 808     if (sep == NULL) {
 809       warn_and_abort("invalid format: could not find '=' character");
 810       return;
 811     }
 812     if (sep == line) {
 813       warn_and_abort("invalid format: name cannot be empty");
 814       return;
 815     }
 816     *sep = '\0';
 817     const char* name = line;
 818     char* value = sep + 1;
 819     Arguments::PropertyList_unique_add(_plist, name, value);
 820   }
 821 };
 822 
 823 void JVMCIRuntime::init_system_properties(SystemProperty** plist) {
 824   char jvmciDir[JVM_MAXPATHLEN];
 825   const char* fileSep = os::file_separator();
 826   jio_snprintf(jvmciDir, sizeof(jvmciDir), "%s%slib%sjvmci",
 827                Arguments::get_java_home(), fileSep, fileSep, fileSep);
 828   DIR* dir = os::opendir(jvmciDir);
 829   if (dir != NULL) {
 830     struct dirent *entry;
 831     char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(jvmciDir), mtInternal);
 832     JVMCIPropertiesFileClosure closure(plist);
 833     const unsigned suffix_len = (unsigned)strlen(".properties");
 834     while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL && !closure.is_aborted()) {
 835       const char* name = entry->d_name;
 836       if (strlen(name) > suffix_len && strcmp(name + strlen(name) - suffix_len, ".properties") == 0) {
 837         char propertiesFilePath[JVM_MAXPATHLEN];
 838         jio_snprintf(propertiesFilePath, sizeof(propertiesFilePath), "%s%s%s",jvmciDir, fileSep, name);
 839         JVMCIRuntime::parse_lines(propertiesFilePath, &closure, false);
 840       }
 841     }
 842     FREE_C_HEAP_ARRAY(char, dbuf);
 843     os::closedir(dir);
 844   }
 845 }
 846 
 847 #define CHECK_WARN_ABORT_(message) THREAD); \
 848   if (HAS_PENDING_EXCEPTION) { \
 849     warning(message); \
 850     char buf[512]; \
 851     jio_snprintf(buf, 512, "Uncaught exception at %s:%d", __FILE__, __LINE__); \
 852     JVMCIRuntime::abort_on_pending_exception(PENDING_EXCEPTION, buf); \
 853     return; \
 854   } \
 855   (void)(0
 856 
 857 void JVMCIRuntime::save_compiler(const char* compiler) {
 858   assert(compiler != NULL, "npe");
 859   assert(_compiler == NULL, "cannot reassign JVMCI compiler");
 860   _compiler = compiler;
 861 }
 862 
 863 void JVMCIRuntime::shutdown(TRAPS) {
 864   if (_HotSpotJVMCIRuntime_instance != NULL) {
 865     _shutdown_called = true;
 866     HandleMark hm(THREAD);
 867     Handle receiver = get_HotSpotJVMCIRuntime(CHECK);
 868     JavaValue result(T_VOID);
 869     JavaCallArguments args;
 870     args.push_oop(receiver);
 871     JavaCalls::call_special(&result, receiver->klass(), vmSymbols::shutdown_method_name(), vmSymbols::void_method_signature(), &args, CHECK);
 872   }
 873 }
 874 
 875 bool JVMCIRuntime::treat_as_trivial(Method* method) {
 876   if (_HotSpotJVMCIRuntime_initialized) {
 877     oop loader = method->method_holder()->class_loader();
 878     if (loader == NULL) {
 879       for (int i = 0; i < _trivial_prefixes_count; i++) {
 880         if (method->method_holder()->name()->starts_with(_trivial_prefixes[i])) {
 881           return true;
 882         }
 883       }
 884     }
 885   }
 886   return false;
 887 }
 888 
 889 void JVMCIRuntime::parse_lines(char* path, ParseClosure* closure, bool warnStatFailure) {
 890   struct stat st;
 891   if (::stat(path, &st) == 0 && (st.st_mode & S_IFREG) == S_IFREG) { // exists & is regular file
 892     int file_handle = ::open(path, os::default_file_open_flags(), 0);
 893     if (file_handle != -1) {
 894       char* buffer = NEW_C_HEAP_ARRAY(char, st.st_size + 1, mtInternal);
 895       int num_read;
 896       num_read = (int) ::read(file_handle, (char*) buffer, st.st_size);
 897       if (num_read == -1) {
 898         warning("Error reading file %s due to %s", path, strerror(errno));
 899       } else if (num_read != st.st_size) {
 900         warning("Only read %d of " SIZE_FORMAT " bytes from %s", num_read, (size_t) st.st_size, path);
 901       }
 902       ::close(file_handle);
 903       closure->set_filename(path);
 904       if (num_read == st.st_size) {
 905         buffer[num_read] = '\0';
 906 
 907         char* line = buffer;
 908         while (line - buffer < num_read && !closure->is_aborted()) {
 909           // find line end (\r, \n or \r\n)
 910           char* nextline = NULL;
 911           char* cr = strchr(line, '\r');
 912           char* lf = strchr(line, '\n');
 913           if (cr != NULL && lf != NULL) {
 914             char* min = MIN2(cr, lf);
 915             *min = '\0';
 916             if (lf == cr + 1) {
 917               nextline = lf + 1;
 918             } else {
 919               nextline = min + 1;
 920             }
 921           } else if (cr != NULL) {
 922             *cr = '\0';
 923             nextline = cr + 1;
 924           } else if (lf != NULL) {
 925             *lf = '\0';
 926             nextline = lf + 1;
 927           }
 928           // trim left
 929           while (*line == ' ' || *line == '\t') line++;
 930           char* end = line + strlen(line);
 931           // trim right
 932           while (end > line && (*(end -1) == ' ' || *(end -1) == '\t')) end--;
 933           *end = '\0';
 934           // skip comments and empty lines
 935           if (*line != '#' && strlen(line) > 0) {
 936             closure->parse_line(line);
 937           }
 938           if (nextline != NULL) {
 939             line = nextline;
 940           } else {
 941             // File without newline at the end
 942             break;
 943           }
 944         }
 945       }
 946       FREE_C_HEAP_ARRAY(char, buffer);
 947     } else {
 948       warning("Error opening file %s due to %s", path, strerror(errno));
 949     }
 950   } else if (warnStatFailure) {
 951     warning("Could not stat file %s due to %s", path, strerror(errno));
 952   }
 953 }