sharkRuntime.cpp revision 3602:da91efe96a93 
1/*
2 * Copyright (c) 1999, 2012, 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.
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24 */
25
26#include "precompiled.hpp"
27#include "runtime/biasedLocking.hpp"
28#include "runtime/deoptimization.hpp"
29#include "runtime/thread.hpp"
30#include "shark/llvmHeaders.hpp"
31#include "shark/sharkRuntime.hpp"
32#ifdef TARGET_ARCH_zero
33# include "stack_zero.inline.hpp"
34#endif
35
36using namespace llvm;
37
38JRT_ENTRY(int, SharkRuntime::find_exception_handler(JavaThread* thread,
39                                                    int*        indexes,
40                                                    int         num_indexes))
41  constantPoolHandle pool(thread, method(thread)->constants());
42  KlassHandle exc_klass(thread, ((oop) tos_at(thread, 0))->klass());
43
44  for (int i = 0; i < num_indexes; i++) {
45    Klass* tmp = pool->klass_at(indexes[i], CHECK_0);
46    KlassHandle chk_klass(thread, tmp);
47
48    if (exc_klass() == chk_klass())
49      return i;
50
51    if (exc_klass()->is_subtype_of(chk_klass()))
52      return i;
53  }
54
55  return -1;
56JRT_END
57
58JRT_ENTRY(void, SharkRuntime::monitorenter(JavaThread*      thread,
59                                           BasicObjectLock* lock))
60  if (PrintBiasedLockingStatistics)
61    Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
62
63  Handle object(thread, lock->obj());
64  assert(Universe::heap()->is_in_reserved_or_null(object()), "should be");
65  if (UseBiasedLocking) {
66    // Retry fast entry if bias is revoked to avoid unnecessary inflation
67    ObjectSynchronizer::fast_enter(object, lock->lock(), true, CHECK);
68  } else {
69    ObjectSynchronizer::slow_enter(object, lock->lock(), CHECK);
70  }
71  assert(Universe::heap()->is_in_reserved_or_null(lock->obj()), "should be");
72JRT_END
73
74JRT_ENTRY(void, SharkRuntime::monitorexit(JavaThread*      thread,
75                                          BasicObjectLock* lock))
76  Handle object(thread, lock->obj());
77  assert(Universe::heap()->is_in_reserved_or_null(object()), "should be");
78  if (lock == NULL || object()->is_unlocked()) {
79    THROW(vmSymbols::java_lang_IllegalMonitorStateException());
80  }
81  ObjectSynchronizer::slow_exit(object(), lock->lock(), thread);
82JRT_END
83
84JRT_ENTRY(void, SharkRuntime::new_instance(JavaThread* thread, int index))
85  Klass* k_oop = method(thread)->constants()->klass_at(index, CHECK);
86  instanceKlassHandle klass(THREAD, k_oop);
87
88  // Make sure we are not instantiating an abstract klass
89  klass->check_valid_for_instantiation(true, CHECK);
90
91  // Make sure klass is initialized
92  klass->initialize(CHECK);
93
94  // At this point the class may not be fully initialized
95  // because of recursive initialization. If it is fully
96  // initialized & has_finalized is not set, we rewrite
97  // it into its fast version (Note: no locking is needed
98  // here since this is an atomic byte write and can be
99  // done more than once).
100  //
101  // Note: In case of classes with has_finalized we don't
102  //       rewrite since that saves us an extra check in
103  //       the fast version which then would call the
104  //       slow version anyway (and do a call back into
105  //       Java).
106  //       If we have a breakpoint, then we don't rewrite
107  //       because the _breakpoint bytecode would be lost.
108  oop obj = klass->allocate_instance(CHECK);
109  thread->set_vm_result(obj);
110JRT_END
111
112JRT_ENTRY(void, SharkRuntime::newarray(JavaThread* thread,
113                                       BasicType   type,
114                                       int         size))
115  oop obj = oopFactory::new_typeArray(type, size, CHECK);
116  thread->set_vm_result(obj);
117JRT_END
118
119JRT_ENTRY(void, SharkRuntime::anewarray(JavaThread* thread,
120                                        int         index,
121                                        int         size))
122  Klass* klass = method(thread)->constants()->klass_at(index, CHECK);
123  objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK);
124  thread->set_vm_result(obj);
125JRT_END
126
127JRT_ENTRY(void, SharkRuntime::multianewarray(JavaThread* thread,
128                                             int         index,
129                                             int         ndims,
130                                             int*        dims))
131  Klass* klass = method(thread)->constants()->klass_at(index, CHECK);
132  oop obj = arrayKlass::cast(klass)->multi_allocate(ndims, dims, CHECK);
133  thread->set_vm_result(obj);
134JRT_END
135
136JRT_ENTRY(void, SharkRuntime::register_finalizer(JavaThread* thread,
137                                                 oop         object))
138  assert(object->is_oop(), "should be");
139  assert(object->klass()->has_finalizer(), "should have");
140  InstanceKlass::register_finalizer(instanceOop(object), CHECK);
141JRT_END
142
143JRT_ENTRY(void, SharkRuntime::throw_ArithmeticException(JavaThread* thread,
144                                                        const char* file,
145                                                        int         line))
146  Exceptions::_throw_msg(
147    thread, file, line,
148    vmSymbols::java_lang_ArithmeticException(),
149    "");
150JRT_END
151
152JRT_ENTRY(void, SharkRuntime::throw_ArrayIndexOutOfBoundsException(
153                                                     JavaThread* thread,
154                                                     const char* file,
155                                                     int         line,
156                                                     int         index))
157  char msg[jintAsStringSize];
158  snprintf(msg, sizeof(msg), "%d", index);
159  Exceptions::_throw_msg(
160    thread, file, line,
161    vmSymbols::java_lang_ArrayIndexOutOfBoundsException(),
162    msg);
163JRT_END
164
165JRT_ENTRY(void, SharkRuntime::throw_ClassCastException(JavaThread* thread,
166                                                       const char* file,
167                                                       int         line))
168  Exceptions::_throw_msg(
169    thread, file, line,
170    vmSymbols::java_lang_ClassCastException(),
171    "");
172JRT_END
173
174JRT_ENTRY(void, SharkRuntime::throw_NullPointerException(JavaThread* thread,
175                                                         const char* file,
176                                                         int         line))
177  Exceptions::_throw_msg(
178    thread, file, line,
179    vmSymbols::java_lang_NullPointerException(),
180    "");
181JRT_END
182
183// Non-VM calls
184// Nothing in these must ever GC!
185
186void SharkRuntime::dump(const char *name, intptr_t value) {
187  oop valueOop = (oop) value;
188  tty->print("%s = ", name);
189  if (valueOop->is_oop(true))
190    valueOop->print_on(tty);
191  else if (value >= ' ' && value <= '~')
192    tty->print("'%c' (%d)", value, value);
193  else
194    tty->print("%p", value);
195  tty->print_cr("");
196}
197
198bool SharkRuntime::is_subtype_of(Klass* check_klass, Klass* object_klass) {
199  return object_klass->is_subtype_of(check_klass);
200}
201
202int SharkRuntime::uncommon_trap(JavaThread* thread, int trap_request) {
203  Thread *THREAD = thread;
204
205  // In C2, uncommon_trap_blob creates a frame, so all the various
206  // deoptimization functions expect to find the frame of the method
207  // being deopted one frame down on the stack.  We create a dummy
208  // frame to mirror this.
209  FakeStubFrame *stubframe = FakeStubFrame::build(CHECK_0);
210  thread->push_zero_frame(stubframe);
211
212  // Initiate the trap
213  thread->set_last_Java_frame();
214  Deoptimization::UnrollBlock *urb =
215    Deoptimization::uncommon_trap(thread, trap_request);
216  thread->reset_last_Java_frame();
217
218  // Pop our dummy frame and the frame being deoptimized
219  thread->pop_zero_frame();
220  thread->pop_zero_frame();
221
222  // Push skeleton frames
223  int number_of_frames = urb->number_of_frames();
224  for (int i = 0; i < number_of_frames; i++) {
225    intptr_t size = urb->frame_sizes()[i];
226    InterpreterFrame *frame = InterpreterFrame::build(size, CHECK_0);
227    thread->push_zero_frame(frame);
228  }
229
230  // Push another dummy frame
231  stubframe = FakeStubFrame::build(CHECK_0);
232  thread->push_zero_frame(stubframe);
233
234  // Fill in the skeleton frames
235  thread->set_last_Java_frame();
236  Deoptimization::unpack_frames(thread, Deoptimization::Unpack_uncommon_trap);
237  thread->reset_last_Java_frame();
238
239  // Pop our dummy frame
240  thread->pop_zero_frame();
241
242  // Fall back into the interpreter
243  return number_of_frames;
244}
245
246FakeStubFrame* FakeStubFrame::build(TRAPS) {
247  ZeroStack *stack = ((JavaThread *) THREAD)->zero_stack();
248  stack->overflow_check(header_words, CHECK_NULL);
249
250  stack->push(0); // next_frame, filled in later
251  intptr_t *fp = stack->sp();
252  assert(fp - stack->sp() == next_frame_off, "should be");
253
254  stack->push(FAKE_STUB_FRAME);
255  assert(fp - stack->sp() == frame_type_off, "should be");
256
257  return (FakeStubFrame *) fp;
258}
259