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#include "utilities/macros.hpp"
48
49#if defined(_MSC_VER)
50#define strtoll _strtoi64
51#endif
52
53jobject JVMCIRuntime::_HotSpotJVMCIRuntime_instance = NULL;
54bool JVMCIRuntime::_HotSpotJVMCIRuntime_initialized = false;
55bool JVMCIRuntime::_well_known_classes_initialized = false;
56int JVMCIRuntime::_trivial_prefixes_count = 0;
57char** JVMCIRuntime::_trivial_prefixes = NULL;
58JVMCIRuntime::CompLevelAdjustment JVMCIRuntime::_comp_level_adjustment = JVMCIRuntime::none;
59bool JVMCIRuntime::_shutdown_called = false;
60
61BasicType JVMCIRuntime::kindToBasicType(Handle kind, TRAPS) {
62  if (kind.is_null()) {
63    THROW_(vmSymbols::java_lang_NullPointerException(), T_ILLEGAL);
64  }
65  jchar ch = JavaKind::typeChar(kind);
66  switch(ch) {
67    case 'Z': return T_BOOLEAN;
68    case 'B': return T_BYTE;
69    case 'S': return T_SHORT;
70    case 'C': return T_CHAR;
71    case 'I': return T_INT;
72    case 'F': return T_FLOAT;
73    case 'J': return T_LONG;
74    case 'D': return T_DOUBLE;
75    case 'A': return T_OBJECT;
76    case '-': return T_ILLEGAL;
77    default:
78      JVMCI_ERROR_(T_ILLEGAL, "unexpected Kind: %c", ch);
79  }
80}
81
82// Simple helper to see if the caller of a runtime stub which
83// entered the VM has been deoptimized
84
85static bool caller_is_deopted() {
86  JavaThread* thread = JavaThread::current();
87  RegisterMap reg_map(thread, false);
88  frame runtime_frame = thread->last_frame();
89  frame caller_frame = runtime_frame.sender(&reg_map);
90  assert(caller_frame.is_compiled_frame(), "must be compiled");
91  return caller_frame.is_deoptimized_frame();
92}
93
94// Stress deoptimization
95static void deopt_caller() {
96  if ( !caller_is_deopted()) {
97    JavaThread* thread = JavaThread::current();
98    RegisterMap reg_map(thread, false);
99    frame runtime_frame = thread->last_frame();
100    frame caller_frame = runtime_frame.sender(&reg_map);
101    Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
102    assert(caller_is_deopted(), "Must be deoptimized");
103  }
104}
105
106JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_instance(JavaThread* thread, Klass* klass))
107  JRT_BLOCK;
108  assert(klass->is_klass(), "not a class");
109  Handle holder(THREAD, klass->klass_holder()); // keep the klass alive
110  instanceKlassHandle h(thread, klass);
111  h->check_valid_for_instantiation(true, CHECK);
112  // make sure klass is initialized
113  h->initialize(CHECK);
114  // allocate instance and return via TLS
115  oop obj = h->allocate_instance(CHECK);
116  thread->set_vm_result(obj);
117  JRT_BLOCK_END;
118
119  if (ReduceInitialCardMarks) {
120    new_store_pre_barrier(thread);
121  }
122JRT_END
123
124JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_array(JavaThread* thread, Klass* array_klass, jint length))
125  JRT_BLOCK;
126  // Note: no handle for klass needed since they are not used
127  //       anymore after new_objArray() and no GC can happen before.
128  //       (This may have to change if this code changes!)
129  assert(array_klass->is_klass(), "not a class");
130  oop obj;
131  if (array_klass->is_typeArray_klass()) {
132    BasicType elt_type = TypeArrayKlass::cast(array_klass)->element_type();
133    obj = oopFactory::new_typeArray(elt_type, length, CHECK);
134  } else {
135    Handle holder(THREAD, array_klass->klass_holder()); // keep the klass alive
136    Klass* elem_klass = ObjArrayKlass::cast(array_klass)->element_klass();
137    obj = oopFactory::new_objArray(elem_klass, length, CHECK);
138  }
139  thread->set_vm_result(obj);
140  // This is pretty rare but this runtime patch is stressful to deoptimization
141  // if we deoptimize here so force a deopt to stress the path.
142  if (DeoptimizeALot) {
143    static int deopts = 0;
144    // Alternate between deoptimizing and raising an error (which will also cause a deopt)
145    if (deopts++ % 2 == 0) {
146      ResourceMark rm(THREAD);
147      THROW(vmSymbols::java_lang_OutOfMemoryError());
148    } else {
149      deopt_caller();
150    }
151  }
152  JRT_BLOCK_END;
153
154  if (ReduceInitialCardMarks) {
155    new_store_pre_barrier(thread);
156  }
157JRT_END
158
159void JVMCIRuntime::new_store_pre_barrier(JavaThread* thread) {
160  // After any safepoint, just before going back to compiled code,
161  // we inform the GC that we will be doing initializing writes to
162  // this object in the future without emitting card-marks, so
163  // GC may take any compensating steps.
164  // NOTE: Keep this code consistent with GraphKit::store_barrier.
165
166  oop new_obj = thread->vm_result();
167  if (new_obj == NULL)  return;
168
169  assert(Universe::heap()->can_elide_tlab_store_barriers(),
170         "compiler must check this first");
171  // GC may decide to give back a safer copy of new_obj.
172  new_obj = Universe::heap()->new_store_pre_barrier(thread, new_obj);
173  thread->set_vm_result(new_obj);
174}
175
176JRT_ENTRY(void, JVMCIRuntime::new_multi_array(JavaThread* thread, Klass* klass, int rank, jint* dims))
177  assert(klass->is_klass(), "not a class");
178  assert(rank >= 1, "rank must be nonzero");
179  Handle holder(THREAD, klass->klass_holder()); // keep the klass alive
180  oop obj = ArrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK);
181  thread->set_vm_result(obj);
182JRT_END
183
184JRT_ENTRY(void, JVMCIRuntime::dynamic_new_array(JavaThread* thread, oopDesc* element_mirror, jint length))
185  oop obj = Reflection::reflect_new_array(element_mirror, length, CHECK);
186  thread->set_vm_result(obj);
187JRT_END
188
189JRT_ENTRY(void, JVMCIRuntime::dynamic_new_instance(JavaThread* thread, oopDesc* type_mirror))
190  instanceKlassHandle klass(THREAD, java_lang_Class::as_Klass(type_mirror));
191
192  if (klass == NULL) {
193    ResourceMark rm(THREAD);
194    THROW(vmSymbols::java_lang_InstantiationException());
195  }
196
197  // Create new instance (the receiver)
198  klass->check_valid_for_instantiation(false, CHECK);
199
200  // Make sure klass gets initialized
201  klass->initialize(CHECK);
202
203  oop obj = klass->allocate_instance(CHECK);
204  thread->set_vm_result(obj);
205JRT_END
206
207extern void vm_exit(int code);
208
209// Enter this method from compiled code handler below. This is where we transition
210// to VM mode. This is done as a helper routine so that the method called directly
211// from compiled code does not have to transition to VM. This allows the entry
212// method to see if the nmethod that we have just looked up a handler for has
213// been deoptimized while we were in the vm. This simplifies the assembly code
214// cpu directories.
215//
216// We are entering here from exception stub (via the entry method below)
217// If there is a compiled exception handler in this method, we will continue there;
218// otherwise we will unwind the stack and continue at the caller of top frame method
219// Note: we enter in Java using a special JRT wrapper. This wrapper allows us to
220// control the area where we can allow a safepoint. After we exit the safepoint area we can
221// check to see if the handler we are going to return is now in a nmethod that has
222// been deoptimized. If that is the case we return the deopt blob
223// unpack_with_exception entry instead. This makes life for the exception blob easier
224// because making that same check and diverting is painful from assembly language.
225JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* thread, oopDesc* ex, address pc, CompiledMethod*& cm))
226  // Reset method handle flag.
227  thread->set_is_method_handle_return(false);
228
229  Handle exception(thread, ex);
230  cm = CodeCache::find_compiled(pc);
231  assert(cm != NULL, "this is not a compiled method");
232  // Adjust the pc as needed/
233  if (cm->is_deopt_pc(pc)) {
234    RegisterMap map(thread, false);
235    frame exception_frame = thread->last_frame().sender(&map);
236    // if the frame isn't deopted then pc must not correspond to the caller of last_frame
237    assert(exception_frame.is_deoptimized_frame(), "must be deopted");
238    pc = exception_frame.pc();
239  }
240#ifdef ASSERT
241  assert(exception.not_null(), "NULL exceptions should be handled by throw_exception");
242  assert(exception->is_oop(), "just checking");
243  // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
244  if (!(exception->is_a(SystemDictionary::Throwable_klass()))) {
245    if (ExitVMOnVerifyError) vm_exit(-1);
246    ShouldNotReachHere();
247  }
248#endif
249
250  // Check the stack guard pages and reenable them if necessary and there is
251  // enough space on the stack to do so.  Use fast exceptions only if the guard
252  // pages are enabled.
253  bool guard_pages_enabled = thread->stack_guards_enabled();
254  if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack();
255
256  if (JvmtiExport::can_post_on_exceptions()) {
257    // To ensure correct notification of exception catches and throws
258    // we have to deoptimize here.  If we attempted to notify the
259    // catches and throws during this exception lookup it's possible
260    // we could deoptimize on the way out of the VM and end back in
261    // the interpreter at the throw site.  This would result in double
262    // notifications since the interpreter would also notify about
263    // these same catches and throws as it unwound the frame.
264
265    RegisterMap reg_map(thread);
266    frame stub_frame = thread->last_frame();
267    frame caller_frame = stub_frame.sender(&reg_map);
268
269    // We don't really want to deoptimize the nmethod itself since we
270    // can actually continue in the exception handler ourselves but I
271    // don't see an easy way to have the desired effect.
272    Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
273    assert(caller_is_deopted(), "Must be deoptimized");
274
275    return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
276  }
277
278  // ExceptionCache is used only for exceptions at call sites and not for implicit exceptions
279  if (guard_pages_enabled) {
280    address fast_continuation = cm->handler_for_exception_and_pc(exception, pc);
281    if (fast_continuation != NULL) {
282      // Set flag if return address is a method handle call site.
283      thread->set_is_method_handle_return(cm->is_method_handle_return(pc));
284      return fast_continuation;
285    }
286  }
287
288  // If the stack guard pages are enabled, check whether there is a handler in
289  // the current method.  Otherwise (guard pages disabled), force an unwind and
290  // skip the exception cache update (i.e., just leave continuation==NULL).
291  address continuation = NULL;
292  if (guard_pages_enabled) {
293
294    // New exception handling mechanism can support inlined methods
295    // with exception handlers since the mappings are from PC to PC
296
297    // debugging support
298    // tracing
299    if (log_is_enabled(Info, exceptions)) {
300      ResourceMark rm;
301      stringStream tempst;
302      tempst.print("compiled method <%s>\n"
303                   " at PC" INTPTR_FORMAT " for thread " INTPTR_FORMAT,
304                   cm->method()->print_value_string(), p2i(pc), p2i(thread));
305      Exceptions::log_exception(exception, tempst);
306    }
307    // for AbortVMOnException flag
308    NOT_PRODUCT(Exceptions::debug_check_abort(exception));
309
310    // Clear out the exception oop and pc since looking up an
311    // exception handler can cause class loading, which might throw an
312    // exception and those fields are expected to be clear during
313    // normal bytecode execution.
314    thread->clear_exception_oop_and_pc();
315
316    bool recursive_exception = false;
317    continuation = SharedRuntime::compute_compiled_exc_handler(cm, pc, exception, false, false, recursive_exception);
318    // If an exception was thrown during exception dispatch, the exception oop may have changed
319    thread->set_exception_oop(exception());
320    thread->set_exception_pc(pc);
321
322    // the exception cache is used only by non-implicit exceptions
323    // Update the exception cache only when there didn't happen
324    // another exception during the computation of the compiled
325    // exception handler. Checking for exception oop equality is not
326    // sufficient because some exceptions are pre-allocated and reused.
327    if (continuation != NULL && !recursive_exception && !SharedRuntime::deopt_blob()->contains(continuation)) {
328      cm->add_handler_for_exception_and_pc(exception, pc, continuation);
329    }
330  }
331
332  // Set flag if return address is a method handle call site.
333  thread->set_is_method_handle_return(cm->is_method_handle_return(pc));
334
335  if (log_is_enabled(Info, exceptions)) {
336    ResourceMark rm;
337    log_info(exceptions)("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT
338                         " for exception thrown at PC " PTR_FORMAT,
339                         p2i(thread), p2i(continuation), p2i(pc));
340  }
341
342  return continuation;
343JRT_END
344
345// Enter this method from compiled code only if there is a Java exception handler
346// in the method handling the exception.
347// We are entering here from exception stub. We don't do a normal VM transition here.
348// We do it in a helper. This is so we can check to see if the nmethod we have just
349// searched for an exception handler has been deoptimized in the meantime.
350address JVMCIRuntime::exception_handler_for_pc(JavaThread* thread) {
351  oop exception = thread->exception_oop();
352  address pc = thread->exception_pc();
353  // Still in Java mode
354  DEBUG_ONLY(ResetNoHandleMark rnhm);
355  CompiledMethod* cm = NULL;
356  address continuation = NULL;
357  {
358    // Enter VM mode by calling the helper
359    ResetNoHandleMark rnhm;
360    continuation = exception_handler_for_pc_helper(thread, exception, pc, cm);
361  }
362  // Back in JAVA, use no oops DON'T safepoint
363
364  // Now check to see if the compiled method we were called from is now deoptimized.
365  // If so we must return to the deopt blob and deoptimize the nmethod
366  if (cm != NULL && caller_is_deopted()) {
367    continuation = SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
368  }
369
370  assert(continuation != NULL, "no handler found");
371  return continuation;
372}
373
374JRT_ENTRY_NO_ASYNC(void, JVMCIRuntime::monitorenter(JavaThread* thread, oopDesc* obj, BasicLock* lock))
375  IF_TRACE_jvmci_3 {
376    char type[O_BUFLEN];
377    obj->klass()->name()->as_C_string(type, O_BUFLEN);
378    markOop mark = obj->mark();
379    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));
380    tty->flush();
381  }
382#ifdef ASSERT
383  if (PrintBiasedLockingStatistics) {
384    Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
385  }
386#endif
387  Handle h_obj(thread, obj);
388  assert(h_obj()->is_oop(), "must be NULL or an object");
389  if (UseBiasedLocking) {
390    // Retry fast entry if bias is revoked to avoid unnecessary inflation
391    ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK);
392  } else {
393    if (JVMCIUseFastLocking) {
394      // When using fast locking, the compiled code has already tried the fast case
395      ObjectSynchronizer::slow_enter(h_obj, lock, THREAD);
396    } else {
397      ObjectSynchronizer::fast_enter(h_obj, lock, false, THREAD);
398    }
399  }
400  TRACE_jvmci_3("%s: exiting locking slow with obj=" INTPTR_FORMAT, thread->name(), p2i(obj));
401JRT_END
402
403JRT_LEAF(void, JVMCIRuntime::monitorexit(JavaThread* thread, oopDesc* obj, BasicLock* lock))
404  assert(thread == JavaThread::current(), "threads must correspond");
405  assert(thread->last_Java_sp(), "last_Java_sp must be set");
406  // monitorexit is non-blocking (leaf routine) => no exceptions can be thrown
407  EXCEPTION_MARK;
408
409#ifdef DEBUG
410  if (!obj->is_oop()) {
411    ResetNoHandleMark rhm;
412    nmethod* method = thread->last_frame().cb()->as_nmethod_or_null();
413    if (method != NULL) {
414      tty->print_cr("ERROR in monitorexit in method %s wrong obj " INTPTR_FORMAT, method->name(), p2i(obj));
415    }
416    thread->print_stack_on(tty);
417    assert(false, "invalid lock object pointer dected");
418  }
419#endif
420
421  if (JVMCIUseFastLocking) {
422    // When using fast locking, the compiled code has already tried the fast case
423    ObjectSynchronizer::slow_exit(obj, lock, THREAD);
424  } else {
425    ObjectSynchronizer::fast_exit(obj, lock, THREAD);
426  }
427  IF_TRACE_jvmci_3 {
428    char type[O_BUFLEN];
429    obj->klass()->name()->as_C_string(type, O_BUFLEN);
430    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));
431    tty->flush();
432  }
433JRT_END
434
435JRT_ENTRY(void, JVMCIRuntime::throw_and_post_jvmti_exception(JavaThread* thread, const char* exception, const char* message))
436  TempNewSymbol symbol = SymbolTable::new_symbol(exception, CHECK);
437  SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, message);
438JRT_END
439
440JRT_ENTRY(void, JVMCIRuntime::throw_klass_external_name_exception(JavaThread* thread, const char* exception, Klass* klass))
441  ResourceMark rm(thread);
442  TempNewSymbol symbol = SymbolTable::new_symbol(exception, CHECK);
443  SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, klass->external_name());
444JRT_END
445
446JRT_ENTRY(void, JVMCIRuntime::throw_class_cast_exception(JavaThread* thread, const char* exception, Klass* caster_klass, Klass* target_klass))
447  ResourceMark rm(thread);
448  const char* message = SharedRuntime::generate_class_cast_message(caster_klass, target_klass);
449  TempNewSymbol symbol = SymbolTable::new_symbol(exception, CHECK);
450  SharedRuntime::throw_and_post_jvmti_exception(thread, symbol, message);
451JRT_END
452
453JRT_LEAF(void, JVMCIRuntime::log_object(JavaThread* thread, oopDesc* obj, bool as_string, bool newline))
454  ttyLocker ttyl;
455
456  if (obj == NULL) {
457    tty->print("NULL");
458  } else if (obj->is_oop_or_null(true) && (!as_string || !java_lang_String::is_instance(obj))) {
459    if (obj->is_oop_or_null(true)) {
460      char buf[O_BUFLEN];
461      tty->print("%s@" INTPTR_FORMAT, obj->klass()->name()->as_C_string(buf, O_BUFLEN), p2i(obj));
462    } else {
463      tty->print(INTPTR_FORMAT, p2i(obj));
464    }
465  } else {
466    ResourceMark rm;
467    assert(obj != NULL && java_lang_String::is_instance(obj), "must be");
468    char *buf = java_lang_String::as_utf8_string(obj);
469    tty->print_raw(buf);
470  }
471  if (newline) {
472    tty->cr();
473  }
474JRT_END
475
476JRT_LEAF(void, JVMCIRuntime::write_barrier_pre(JavaThread* thread, oopDesc* obj))
477  thread->satb_mark_queue().enqueue(obj);
478JRT_END
479
480JRT_LEAF(void, JVMCIRuntime::write_barrier_post(JavaThread* thread, void* card_addr))
481  thread->dirty_card_queue().enqueue(card_addr);
482JRT_END
483
484JRT_LEAF(jboolean, JVMCIRuntime::validate_object(JavaThread* thread, oopDesc* parent, oopDesc* child))
485  bool ret = true;
486  if(!Universe::heap()->is_in_closed_subset(parent)) {
487    tty->print_cr("Parent Object " INTPTR_FORMAT " not in heap", p2i(parent));
488    parent->print();
489    ret=false;
490  }
491  if(!Universe::heap()->is_in_closed_subset(child)) {
492    tty->print_cr("Child Object " INTPTR_FORMAT " not in heap", p2i(child));
493    child->print();
494    ret=false;
495  }
496  return (jint)ret;
497JRT_END
498
499JRT_ENTRY(void, JVMCIRuntime::vm_error(JavaThread* thread, jlong where, jlong format, jlong value))
500  ResourceMark rm;
501  const char *error_msg = where == 0L ? "<internal JVMCI error>" : (char*) (address) where;
502  char *detail_msg = NULL;
503  if (format != 0L) {
504    const char* buf = (char*) (address) format;
505    size_t detail_msg_length = strlen(buf) * 2;
506    detail_msg = (char *) NEW_RESOURCE_ARRAY(u_char, detail_msg_length);
507    jio_snprintf(detail_msg, detail_msg_length, buf, value);
508    report_vm_error(__FILE__, __LINE__, error_msg, "%s", detail_msg);
509  } else {
510    report_vm_error(__FILE__, __LINE__, error_msg);
511  }
512JRT_END
513
514JRT_LEAF(oopDesc*, JVMCIRuntime::load_and_clear_exception(JavaThread* thread))
515  oop exception = thread->exception_oop();
516  assert(exception != NULL, "npe");
517  thread->set_exception_oop(NULL);
518  thread->set_exception_pc(0);
519  return exception;
520JRT_END
521
522PRAGMA_DIAG_PUSH
523PRAGMA_FORMAT_NONLITERAL_IGNORED
524JRT_LEAF(void, JVMCIRuntime::log_printf(JavaThread* thread, oopDesc* format, jlong v1, jlong v2, jlong v3))
525  ResourceMark rm;
526  assert(format != NULL && java_lang_String::is_instance(format), "must be");
527  char *buf = java_lang_String::as_utf8_string(format);
528  tty->print((const char*)buf, v1, v2, v3);
529JRT_END
530PRAGMA_DIAG_POP
531
532static void decipher(jlong v, bool ignoreZero) {
533  if (v != 0 || !ignoreZero) {
534    void* p = (void *)(address) v;
535    CodeBlob* cb = CodeCache::find_blob(p);
536    if (cb) {
537      if (cb->is_nmethod()) {
538        char buf[O_BUFLEN];
539        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()));
540        return;
541      }
542      cb->print_value_on(tty);
543      return;
544    }
545    if (Universe::heap()->is_in(p)) {
546      oop obj = oop(p);
547      obj->print_value_on(tty);
548      return;
549    }
550    tty->print(INTPTR_FORMAT " [long: " JLONG_FORMAT ", double %lf, char %c]",p2i((void *)v), (jlong)v, (jdouble)v, (char)v);
551  }
552}
553
554PRAGMA_DIAG_PUSH
555PRAGMA_FORMAT_NONLITERAL_IGNORED
556JRT_LEAF(void, JVMCIRuntime::vm_message(jboolean vmError, jlong format, jlong v1, jlong v2, jlong v3))
557  ResourceMark rm;
558  const char *buf = (const char*) (address) format;
559  if (vmError) {
560    if (buf != NULL) {
561      fatal(buf, v1, v2, v3);
562    } else {
563      fatal("<anonymous error>");
564    }
565  } else if (buf != NULL) {
566    tty->print(buf, v1, v2, v3);
567  } else {
568    assert(v2 == 0, "v2 != 0");
569    assert(v3 == 0, "v3 != 0");
570    decipher(v1, false);
571  }
572JRT_END
573PRAGMA_DIAG_POP
574
575JRT_LEAF(void, JVMCIRuntime::log_primitive(JavaThread* thread, jchar typeChar, jlong value, jboolean newline))
576  union {
577      jlong l;
578      jdouble d;
579      jfloat f;
580  } uu;
581  uu.l = value;
582  switch (typeChar) {
583    case 'Z': tty->print(value == 0 ? "false" : "true"); break;
584    case 'B': tty->print("%d", (jbyte) value); break;
585    case 'C': tty->print("%c", (jchar) value); break;
586    case 'S': tty->print("%d", (jshort) value); break;
587    case 'I': tty->print("%d", (jint) value); break;
588    case 'F': tty->print("%f", uu.f); break;
589    case 'J': tty->print(JLONG_FORMAT, value); break;
590    case 'D': tty->print("%lf", uu.d); break;
591    default: assert(false, "unknown typeChar"); break;
592  }
593  if (newline) {
594    tty->cr();
595  }
596JRT_END
597
598JRT_ENTRY(jint, JVMCIRuntime::identity_hash_code(JavaThread* thread, oopDesc* obj))
599  return (jint) obj->identity_hash();
600JRT_END
601
602JRT_ENTRY(jboolean, JVMCIRuntime::thread_is_interrupted(JavaThread* thread, oopDesc* receiver, jboolean clear_interrupted))
603  // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
604  // This locking requires thread_in_vm which is why this method cannot be JRT_LEAF.
605  Handle receiverHandle(thread, receiver);
606  MutexLockerEx ml(thread->threadObj() == (void*)receiver ? NULL : Threads_lock);
607  JavaThread* receiverThread = java_lang_Thread::thread(receiverHandle());
608  if (receiverThread == NULL) {
609    // The other thread may exit during this process, which is ok so return false.
610    return JNI_FALSE;
611  } else {
612    return (jint) Thread::is_interrupted(receiverThread, clear_interrupted != 0);
613  }
614JRT_END
615
616JRT_ENTRY(jint, JVMCIRuntime::test_deoptimize_call_int(JavaThread* thread, int value))
617  deopt_caller();
618  return value;
619JRT_END
620
621void JVMCIRuntime::force_initialization(TRAPS) {
622  JVMCIRuntime::initialize_well_known_classes(CHECK);
623
624  ResourceMark rm;
625  TempNewSymbol getCompiler = SymbolTable::new_symbol("getCompiler", CHECK);
626  TempNewSymbol sig = SymbolTable::new_symbol("()Ljdk/vm/ci/runtime/JVMCICompiler;", CHECK);
627  Handle jvmciRuntime = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK);
628  JavaValue result(T_OBJECT);
629  JavaCalls::call_virtual(&result, jvmciRuntime, HotSpotJVMCIRuntime::klass(), getCompiler, sig, CHECK);
630}
631
632// private static JVMCIRuntime JVMCI.initializeRuntime()
633JVM_ENTRY(jobject, JVM_GetJVMCIRuntime(JNIEnv *env, jclass c))
634  if (!EnableJVMCI) {
635    THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled")
636  }
637  JVMCIRuntime::initialize_HotSpotJVMCIRuntime(CHECK_NULL);
638  jobject ret = JVMCIRuntime::get_HotSpotJVMCIRuntime_jobject(CHECK_NULL);
639  return ret;
640JVM_END
641
642Handle JVMCIRuntime::callStatic(const char* className, const char* methodName, const char* signature, JavaCallArguments* args, TRAPS) {
643  TempNewSymbol name = SymbolTable::new_symbol(className, CHECK_(Handle()));
644  KlassHandle klass = SystemDictionary::resolve_or_fail(name, true, CHECK_(Handle()));
645  TempNewSymbol runtime = SymbolTable::new_symbol(methodName, CHECK_(Handle()));
646  TempNewSymbol sig = SymbolTable::new_symbol(signature, CHECK_(Handle()));
647  JavaValue result(T_OBJECT);
648  if (args == NULL) {
649    JavaCalls::call_static(&result, klass, runtime, sig, CHECK_(Handle()));
650  } else {
651    JavaCalls::call_static(&result, klass, runtime, sig, args, CHECK_(Handle()));
652  }
653  return Handle((oop)result.get_jobject());
654}
655
656void JVMCIRuntime::initialize_HotSpotJVMCIRuntime(TRAPS) {
657  guarantee(!_HotSpotJVMCIRuntime_initialized, "cannot reinitialize HotSpotJVMCIRuntime");
658  JVMCIRuntime::initialize_well_known_classes(CHECK);
659  // This should only be called in the context of the JVMCI class being initialized
660  instanceKlassHandle klass = InstanceKlass::cast(SystemDictionary::JVMCI_klass());
661  guarantee(klass->is_being_initialized() && klass->is_reentrant_initialization(THREAD),
662         "HotSpotJVMCIRuntime initialization should only be triggered through JVMCI initialization");
663
664  Handle result = callStatic("jdk/vm/ci/hotspot/HotSpotJVMCIRuntime",
665                             "runtime",
666                             "()Ljdk/vm/ci/hotspot/HotSpotJVMCIRuntime;", NULL, CHECK);
667  objArrayOop trivial_prefixes = HotSpotJVMCIRuntime::trivialPrefixes(result);
668  if (trivial_prefixes != NULL) {
669    char** prefixes = NEW_C_HEAP_ARRAY(char*, trivial_prefixes->length(), mtCompiler);
670    for (int i = 0; i < trivial_prefixes->length(); i++) {
671      oop str = trivial_prefixes->obj_at(i);
672      if (str == NULL) {
673        THROW(vmSymbols::java_lang_NullPointerException());
674      } else {
675        prefixes[i] = strdup(java_lang_String::as_utf8_string(str));
676      }
677    }
678    _trivial_prefixes = prefixes;
679    _trivial_prefixes_count = trivial_prefixes->length();
680  }
681  int adjustment = HotSpotJVMCIRuntime::compilationLevelAdjustment(result);
682  assert(adjustment >= JVMCIRuntime::none &&
683         adjustment <= JVMCIRuntime::by_full_signature,
684         "compilation level adjustment out of bounds");
685  _comp_level_adjustment = (CompLevelAdjustment) adjustment;
686  _HotSpotJVMCIRuntime_initialized = true;
687  _HotSpotJVMCIRuntime_instance = JNIHandles::make_global(result());
688}
689
690void JVMCIRuntime::initialize_JVMCI(TRAPS) {
691  if (JNIHandles::resolve(_HotSpotJVMCIRuntime_instance) == NULL) {
692    callStatic("jdk/vm/ci/runtime/JVMCI",
693               "getRuntime",
694               "()Ljdk/vm/ci/runtime/JVMCIRuntime;", NULL, CHECK);
695  }
696  assert(_HotSpotJVMCIRuntime_initialized == true, "what?");
697}
698
699bool JVMCIRuntime::can_initialize_JVMCI() {
700  // Initializing JVMCI requires the module system to be initialized past phase 3.
701  // The JVMCI API itself isn't available until phase 2 and ServiceLoader (which
702  // JVMCI initialization requires) isn't usable until after phase 3. Testing
703  // whether the system loader is initialized satisfies all these invariants.
704  if (SystemDictionary::java_system_loader() == NULL) {
705    return false;
706  }
707  assert(Universe::is_module_initialized(), "must be");
708  return true;
709}
710
711void JVMCIRuntime::initialize_well_known_classes(TRAPS) {
712  if (JVMCIRuntime::_well_known_classes_initialized == false) {
713    guarantee(can_initialize_JVMCI(), "VM is not yet sufficiently booted to initialize JVMCI");
714    SystemDictionary::WKID scan = SystemDictionary::FIRST_JVMCI_WKID;
715    SystemDictionary::initialize_wk_klasses_through(SystemDictionary::LAST_JVMCI_WKID, scan, CHECK);
716    JVMCIJavaClasses::compute_offsets(CHECK);
717    JVMCIRuntime::_well_known_classes_initialized = true;
718  }
719}
720
721void JVMCIRuntime::metadata_do(void f(Metadata*)) {
722  // For simplicity, the existence of HotSpotJVMCIMetaAccessContext in
723  // the SystemDictionary well known classes should ensure the other
724  // classes have already been loaded, so make sure their order in the
725  // table enforces that.
726  assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedJavaMethodImpl) <
727         SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
728  assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotConstantPool) <
729         SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
730  assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedObjectTypeImpl) <
731         SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
732
733  if (HotSpotJVMCIMetaAccessContext::klass() == NULL ||
734      !HotSpotJVMCIMetaAccessContext::klass()->is_linked()) {
735    // Nothing could be registered yet
736    return;
737  }
738
739  // WeakReference<HotSpotJVMCIMetaAccessContext>[]
740  objArrayOop allContexts = HotSpotJVMCIMetaAccessContext::allContexts();
741  if (allContexts == NULL) {
742    return;
743  }
744
745  // These must be loaded at this point but the linking state doesn't matter.
746  assert(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass() != NULL, "must be loaded");
747  assert(SystemDictionary::HotSpotConstantPool_klass() != NULL, "must be loaded");
748  assert(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass() != NULL, "must be loaded");
749
750  for (int i = 0; i < allContexts->length(); i++) {
751    oop ref = allContexts->obj_at(i);
752    if (ref != NULL) {
753      oop referent = java_lang_ref_Reference::referent(ref);
754      if (referent != NULL) {
755        // Chunked Object[] with last element pointing to next chunk
756        objArrayOop metadataRoots = HotSpotJVMCIMetaAccessContext::metadataRoots(referent);
757        while (metadataRoots != NULL) {
758          for (int typeIndex = 0; typeIndex < metadataRoots->length() - 1; typeIndex++) {
759            oop reference = metadataRoots->obj_at(typeIndex);
760            if (reference == NULL) {
761              continue;
762            }
763            oop metadataRoot = java_lang_ref_Reference::referent(reference);
764            if (metadataRoot == NULL) {
765              continue;
766            }
767            if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass())) {
768              Method* method = CompilerToVM::asMethod(metadataRoot);
769              f(method);
770            } else if (metadataRoot->is_a(SystemDictionary::HotSpotConstantPool_klass())) {
771              ConstantPool* constantPool = CompilerToVM::asConstantPool(metadataRoot);
772              f(constantPool);
773            } else if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass())) {
774              Klass* klass = CompilerToVM::asKlass(metadataRoot);
775              f(klass);
776            } else {
777              metadataRoot->print();
778              ShouldNotReachHere();
779            }
780          }
781          metadataRoots = (objArrayOop)metadataRoots->obj_at(metadataRoots->length() - 1);
782          assert(metadataRoots == NULL || metadataRoots->is_objArray(), "wrong type");
783        }
784      }
785    }
786  }
787}
788
789// private static void CompilerToVM.registerNatives()
790JVM_ENTRY(void, JVM_RegisterJVMCINatives(JNIEnv *env, jclass c2vmClass))
791  if (!EnableJVMCI) {
792    THROW_MSG(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled");
793  }
794
795#ifdef _LP64
796#ifndef SPARC
797  uintptr_t heap_end = (uintptr_t) Universe::heap()->reserved_region().end();
798  uintptr_t allocation_end = heap_end + ((uintptr_t)16) * 1024 * 1024 * 1024;
799  guarantee(heap_end < allocation_end, "heap end too close to end of address space (might lead to erroneous TLAB allocations)");
800#endif // !SPARC
801#else
802  fatal("check TLAB allocation code for address space conflicts");
803#endif // _LP64
804
805  JVMCIRuntime::initialize_well_known_classes(CHECK);
806
807  {
808    ThreadToNativeFromVM trans(thread);
809    env->RegisterNatives(c2vmClass, CompilerToVM::methods, CompilerToVM::methods_count());
810  }
811JVM_END
812
813void JVMCIRuntime::shutdown(TRAPS) {
814  if (_HotSpotJVMCIRuntime_instance != NULL) {
815    _shutdown_called = true;
816    HandleMark hm(THREAD);
817    Handle receiver = get_HotSpotJVMCIRuntime(CHECK);
818    JavaValue result(T_VOID);
819    JavaCallArguments args;
820    args.push_oop(receiver);
821    JavaCalls::call_special(&result, receiver->klass(), vmSymbols::shutdown_method_name(), vmSymbols::void_method_signature(), &args, CHECK);
822  }
823}
824
825CompLevel JVMCIRuntime::adjust_comp_level_inner(methodHandle method, bool is_osr, CompLevel level, JavaThread* thread) {
826  JVMCICompiler* compiler = JVMCICompiler::instance(thread);
827  if (compiler != NULL && compiler->is_bootstrapping()) {
828    return level;
829  }
830  if (!is_HotSpotJVMCIRuntime_initialized() || !_comp_level_adjustment) {
831    // JVMCI cannot participate in compilation scheduling until
832    // JVMCI is initialized and indicates it wants to participate.
833    return level;
834  }
835
836#define CHECK_RETURN THREAD); \
837if (HAS_PENDING_EXCEPTION) { \
838  Handle exception(THREAD, PENDING_EXCEPTION); \
839  CLEAR_PENDING_EXCEPTION; \
840\
841  java_lang_Throwable::java_printStackTrace(exception, THREAD); \
842  if (HAS_PENDING_EXCEPTION) { \
843    CLEAR_PENDING_EXCEPTION; \
844  } \
845  return level; \
846} \
847(void)(0
848
849
850  Thread* THREAD = thread;
851  HandleMark hm;
852  Handle receiver = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK_RETURN);
853  Handle name;
854  Handle sig;
855  if (_comp_level_adjustment == JVMCIRuntime::by_full_signature) {
856    name = java_lang_String::create_from_symbol(method->name(), CHECK_RETURN);
857    sig = java_lang_String::create_from_symbol(method->signature(), CHECK_RETURN);
858  } else {
859    name = Handle();
860    sig = Handle();
861  }
862
863  JavaValue result(T_INT);
864  JavaCallArguments args;
865  args.push_oop(receiver);
866  args.push_oop(method->method_holder()->java_mirror());
867  args.push_oop(name());
868  args.push_oop(sig());
869  args.push_int(is_osr);
870  args.push_int(level);
871  JavaCalls::call_special(&result, receiver->klass(), vmSymbols::adjustCompilationLevel_name(),
872                          vmSymbols::adjustCompilationLevel_signature(), &args, CHECK_RETURN);
873
874  int comp_level = result.get_jint();
875  if (comp_level < CompLevel_none || comp_level > CompLevel_full_optimization) {
876    assert(false, "compilation level out of bounds");
877    return level;
878  }
879  return (CompLevel) comp_level;
880#undef CHECK_RETURN
881}
882
883void JVMCIRuntime::bootstrap_finished(TRAPS) {
884  HandleMark hm(THREAD);
885  Handle receiver = get_HotSpotJVMCIRuntime(CHECK);
886  JavaValue result(T_VOID);
887  JavaCallArguments args;
888  args.push_oop(receiver);
889  JavaCalls::call_special(&result, receiver->klass(), vmSymbols::bootstrapFinished_method_name(), vmSymbols::void_method_signature(), &args, CHECK);
890}
891
892bool JVMCIRuntime::treat_as_trivial(Method* method) {
893  if (_HotSpotJVMCIRuntime_initialized) {
894    for (int i = 0; i < _trivial_prefixes_count; i++) {
895      if (method->method_holder()->name()->starts_with(_trivial_prefixes[i])) {
896        return true;
897      }
898    }
899  }
900  return false;
901}
902