1 /*
   2  * Copyright (c) 1999, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright 2008, 2009, 2010 Red Hat, Inc.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #include "precompiled.hpp"
  27 #include "runtime/atomic.inline.hpp"
  28 #include "runtime/biasedLocking.hpp"
  29 #include "runtime/deoptimization.hpp"
  30 #include "runtime/thread.hpp"
  31 #include "shark/llvmHeaders.hpp"
  32 #include "shark/sharkRuntime.hpp"
  33 #include "utilities/macros.hpp"
  34 #ifdef ZERO
  35 # include "stack_zero.inline.hpp"
  36 #endif
  37 
  38 using namespace llvm;
  39 
  40 JRT_ENTRY(int, SharkRuntime::find_exception_handler(JavaThread* thread,
  41                                                     int*        indexes,
  42                                                     int         num_indexes))
  43   constantPoolHandle pool(thread, method(thread)->constants());
  44   KlassHandle exc_klass(thread, ((oop) tos_at(thread, 0))->klass());
  45 
  46   for (int i = 0; i < num_indexes; i++) {
  47     Klass* tmp = pool->klass_at(indexes[i], CHECK_0);
  48     KlassHandle chk_klass(thread, tmp);
  49 
  50     if (exc_klass() == chk_klass())
  51       return i;
  52 
  53     if (exc_klass()->is_subtype_of(chk_klass()))
  54       return i;
  55   }
  56 
  57   return -1;
  58 JRT_END
  59 
  60 JRT_ENTRY(void, SharkRuntime::monitorenter(JavaThread*      thread,
  61                                            BasicObjectLock* lock))
  62   if (PrintBiasedLockingStatistics)
  63     Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
  64 
  65   Handle object(thread, lock->obj());
  66   assert(Universe::heap()->is_in_reserved_or_null(object()), "should be");
  67   if (UseBiasedLocking) {
  68     // Retry fast entry if bias is revoked to avoid unnecessary inflation
  69     ObjectSynchronizer::fast_enter(object, lock->lock(), true, CHECK);
  70   } else {
  71     ObjectSynchronizer::slow_enter(object, lock->lock(), CHECK);
  72   }
  73   assert(Universe::heap()->is_in_reserved_or_null(lock->obj()), "should be");
  74 JRT_END
  75 
  76 JRT_ENTRY(void, SharkRuntime::monitorexit(JavaThread*      thread,
  77                                           BasicObjectLock* lock))
  78   Handle object(thread, lock->obj());
  79   assert(Universe::heap()->is_in_reserved_or_null(object()), "should be");
  80   if (lock == NULL || object()->is_unlocked()) {
  81     THROW(vmSymbols::java_lang_IllegalMonitorStateException());
  82   }
  83   ObjectSynchronizer::slow_exit(object(), lock->lock(), thread);
  84 JRT_END
  85 
  86 JRT_ENTRY(void, SharkRuntime::new_instance(JavaThread* thread, int index))
  87   Klass* k_oop = method(thread)->constants()->klass_at(index, CHECK);
  88   instanceKlassHandle klass(THREAD, k_oop);
  89 
  90   // Make sure we are not instantiating an abstract klass
  91   klass->check_valid_for_instantiation(true, CHECK);
  92 
  93   // Make sure klass is initialized
  94   klass->initialize(CHECK);
  95 
  96   // At this point the class may not be fully initialized
  97   // because of recursive initialization. If it is fully
  98   // initialized & has_finalized is not set, we rewrite
  99   // it into its fast version (Note: no locking is needed
 100   // here since this is an atomic byte write and can be
 101   // done more than once).
 102   //
 103   // Note: In case of classes with has_finalized we don't
 104   //       rewrite since that saves us an extra check in
 105   //       the fast version which then would call the
 106   //       slow version anyway (and do a call back into
 107   //       Java).
 108   //       If we have a breakpoint, then we don't rewrite
 109   //       because the _breakpoint bytecode would be lost.
 110   oop obj = klass->allocate_instance(CHECK);
 111   thread->set_vm_result(obj);
 112 JRT_END
 113 
 114 JRT_ENTRY(void, SharkRuntime::newarray(JavaThread* thread,
 115                                        BasicType   type,
 116                                        int         size))
 117   oop obj = oopFactory::new_typeArray(type, size, CHECK);
 118   thread->set_vm_result(obj);
 119 JRT_END
 120 
 121 JRT_ENTRY(void, SharkRuntime::anewarray(JavaThread* thread,
 122                                         int         index,
 123                                         int         size))
 124   Klass* klass = method(thread)->constants()->klass_at(index, CHECK);
 125   objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
 126   thread->set_vm_result(obj);
 127 JRT_END
 128 
 129 JRT_ENTRY(void, SharkRuntime::multianewarray(JavaThread* thread,
 130                                              int         index,
 131                                              int         ndims,
 132                                              int*        dims))
 133   Klass* klass = method(thread)->constants()->klass_at(index, CHECK);
 134   oop obj = ArrayKlass::cast(klass)->multi_allocate(ndims, dims, CHECK);
 135   thread->set_vm_result(obj);
 136 JRT_END
 137 
 138 JRT_ENTRY(void, SharkRuntime::register_finalizer(JavaThread* thread,
 139                                                  oop         object))
 140   assert(object->is_oop(), "should be");
 141   assert(object->klass()->has_finalizer(), "should have");
 142   InstanceKlass::register_finalizer(instanceOop(object), CHECK);
 143 JRT_END
 144 
 145 JRT_ENTRY(void, SharkRuntime::throw_ArithmeticException(JavaThread* thread,
 146                                                         const char* file,
 147                                                         int         line))
 148   Exceptions::_throw_msg(
 149     thread, file, line,
 150     vmSymbols::java_lang_ArithmeticException(),
 151     "");
 152 JRT_END
 153 
 154 JRT_ENTRY(void, SharkRuntime::throw_ArrayIndexOutOfBoundsException(
 155                                                      JavaThread* thread,
 156                                                      const char* file,
 157                                                      int         line,
 158                                                      int         index))
 159   char msg[jintAsStringSize];
 160   snprintf(msg, sizeof(msg), "%d", index);
 161   Exceptions::_throw_msg(
 162     thread, file, line,
 163     vmSymbols::java_lang_ArrayIndexOutOfBoundsException(),
 164     msg);
 165 JRT_END
 166 
 167 JRT_ENTRY(void, SharkRuntime::throw_ClassCastException(JavaThread* thread,
 168                                                        const char* file,
 169                                                        int         line))
 170   Exceptions::_throw_msg(
 171     thread, file, line,
 172     vmSymbols::java_lang_ClassCastException(),
 173     "");
 174 JRT_END
 175 
 176 JRT_ENTRY(void, SharkRuntime::throw_NullPointerException(JavaThread* thread,
 177                                                          const char* file,
 178                                                          int         line))
 179   Exceptions::_throw_msg(
 180     thread, file, line,
 181     vmSymbols::java_lang_NullPointerException(),
 182     "");
 183 JRT_END
 184 
 185 // Non-VM calls
 186 // Nothing in these must ever GC!
 187 
 188 void SharkRuntime::dump(const char *name, intptr_t value) {
 189   oop valueOop = (oop) value;
 190   tty->print("%s = ", name);
 191   if (valueOop->is_oop(true))
 192     valueOop->print_on(tty);
 193   else if (value >= ' ' && value <= '~')
 194     tty->print("'%c' (%d)", value, value);
 195   else
 196     tty->print("%p", value);
 197   tty->print_cr("");
 198 }
 199 
 200 bool SharkRuntime::is_subtype_of(Klass* check_klass, Klass* object_klass) {
 201   return object_klass->is_subtype_of(check_klass);
 202 }
 203 
 204 int SharkRuntime::uncommon_trap(JavaThread* thread, int trap_request) {
 205   Thread *THREAD = thread;
 206 
 207   // In C2, uncommon_trap_blob creates a frame, so all the various
 208   // deoptimization functions expect to find the frame of the method
 209   // being deopted one frame down on the stack.  We create a dummy
 210   // frame to mirror this.
 211   FakeStubFrame *stubframe = FakeStubFrame::build(CHECK_0);
 212   thread->push_zero_frame(stubframe);
 213 
 214   // Initiate the trap
 215   thread->set_last_Java_frame();
 216   Deoptimization::UnrollBlock *urb =
 217     Deoptimization::uncommon_trap(thread, trap_request, Deoptimization::Unpack_uncommon_trap);
 218   thread->reset_last_Java_frame();
 219   assert(urb->unpack_kind() == Deoptimization::Unpack_uncommon_trap, "expected Unpack_uncommon_trap");
 220 
 221   // Pop our dummy frame and the frame being deoptimized
 222   thread->pop_zero_frame();
 223   thread->pop_zero_frame();
 224 
 225   // Push skeleton frames
 226   int number_of_frames = urb->number_of_frames();
 227   for (int i = 0; i < number_of_frames; i++) {
 228     intptr_t size = urb->frame_sizes()[i];
 229     InterpreterFrame *frame = InterpreterFrame::build(size, CHECK_0);
 230     thread->push_zero_frame(frame);
 231   }
 232 
 233   // Push another dummy frame
 234   stubframe = FakeStubFrame::build(CHECK_0);
 235   thread->push_zero_frame(stubframe);
 236 
 237   // Fill in the skeleton frames
 238   thread->set_last_Java_frame();
 239   Deoptimization::unpack_frames(thread, Deoptimization::Unpack_uncommon_trap);
 240   thread->reset_last_Java_frame();
 241 
 242   // Pop our dummy frame
 243   thread->pop_zero_frame();
 244 
 245   // Fall back into the interpreter
 246   return number_of_frames;
 247 }
 248 
 249 FakeStubFrame* FakeStubFrame::build(TRAPS) {
 250   ZeroStack *stack = ((JavaThread *) THREAD)->zero_stack();
 251   stack->overflow_check(header_words, CHECK_NULL);
 252 
 253   stack->push(0); // next_frame, filled in later
 254   intptr_t *fp = stack->sp();
 255   assert(fp - stack->sp() == next_frame_off, "should be");
 256 
 257   stack->push(FAKE_STUB_FRAME);
 258   assert(fp - stack->sp() == frame_type_off, "should be");
 259 
 260   return (FakeStubFrame *) fp;
 261 }