1 /*
2 * Copyright (c) 2012, 2015, 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 "code/codeCache.hpp"
27 #include "compiler/compileBroker.hpp"
28 #include "compiler/disassembler.hpp"
29 #include "jvmci/jvmciRuntime.hpp"
30 #include "jvmci/jvmciCompilerToVM.hpp"
31 #include "jvmci/jvmciCompiler.hpp"
32 #include "jvmci/jvmciJavaClasses.hpp"
33 #include "jvmci/jvmciEnv.hpp"
34 #include "memory/oopFactory.hpp"
35 #include "oops/oop.inline.hpp"
36 #include "oops/objArrayOop.inline.hpp"
37 #include "prims/jvm.h"
38 #include "runtime/biasedLocking.hpp"
39 #include "runtime/interfaceSupport.hpp"
40 #include "runtime/reflection.hpp"
41 #include "runtime/sharedRuntime.hpp"
42 #include "utilities/debug.hpp"
43 #include "utilities/defaultStream.hpp"
44
45 #if defined(_MSC_VER)
46 #define strtoll _strtoi64
47 #endif
48
49 jobject JVMCIRuntime::_HotSpotJVMCIRuntime_instance = NULL;
50 bool JVMCIRuntime::_HotSpotJVMCIRuntime_initialized = false;
51 bool JVMCIRuntime::_well_known_classes_initialized = false;
52 const char* JVMCIRuntime::_compiler = NULL;
53 int JVMCIRuntime::_options_count = 0;
54 SystemProperty** JVMCIRuntime::_options = NULL;
55 int JVMCIRuntime::_trivial_prefixes_count = 0;
56 char** JVMCIRuntime::_trivial_prefixes = NULL;
57 bool JVMCIRuntime::_shutdown_called = false;
58
59 static const char* OPTION_PREFIX = "jvmci.option.";
60 static const size_t OPTION_PREFIX_LEN = strlen(OPTION_PREFIX);
61
62 BasicType JVMCIRuntime::kindToBasicType(Handle kind, TRAPS) {
63 if (kind.is_null()) {
64 THROW_(vmSymbols::java_lang_NullPointerException(), T_ILLEGAL);
65 }
66 jchar ch = JavaKind::typeChar(kind);
67 switch(ch) {
68 case 'z': return T_BOOLEAN;
69 case 'b': return T_BYTE;
70 case 's': return T_SHORT;
71 case 'c': return T_CHAR;
72 case 'i': return T_INT;
73 case 'f': return T_FLOAT;
74 case 'j': return T_LONG;
75 case 'd': return T_DOUBLE;
76 case 'a': return T_OBJECT;
77 case '-': return T_ILLEGAL;
78 default:
79 JVMCI_ERROR_(T_ILLEGAL, "unexpected Kind: %c", ch);
80 }
81 }
82
83 // Simple helper to see if the caller of a runtime stub which
84 // entered the VM has been deoptimized
85
86 static bool caller_is_deopted() {
87 JavaThread* thread = JavaThread::current();
88 RegisterMap reg_map(thread, false);
89 frame runtime_frame = thread->last_frame();
90 frame caller_frame = runtime_frame.sender(®_map);
91 assert(caller_frame.is_compiled_frame(), "must be compiled");
92 return caller_frame.is_deoptimized_frame();
93 }
94
95 // Stress deoptimization
96 static void deopt_caller() {
97 if ( !caller_is_deopted()) {
98 JavaThread* thread = JavaThread::current();
99 RegisterMap reg_map(thread, false);
100 frame runtime_frame = thread->last_frame();
101 frame caller_frame = runtime_frame.sender(®_map);
102 Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
103 assert(caller_is_deopted(), "Must be deoptimized");
104 }
105 }
106
107 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_instance(JavaThread* thread, Klass* klass))
108 JRT_BLOCK;
109 assert(klass->is_klass(), "not a class");
110 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 }
122 JRT_END
123
124 JRT_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 Klass* elem_klass = ObjArrayKlass::cast(array_klass)->element_klass();
136 obj = oopFactory::new_objArray(elem_klass, length, CHECK);
137 }
138 thread->set_vm_result(obj);
139 // This is pretty rare but this runtime patch is stressful to deoptimization
140 // if we deoptimize here so force a deopt to stress the path.
141 if (DeoptimizeALot) {
142 static int deopts = 0;
143 // Alternate between deoptimizing and raising an error (which will also cause a deopt)
144 if (deopts++ % 2 == 0) {
145 ResourceMark rm(THREAD);
146 THROW(vmSymbols::java_lang_OutOfMemoryError());
147 } else {
148 deopt_caller();
149 }
150 }
151 JRT_BLOCK_END;
152
153 if (ReduceInitialCardMarks) {
154 new_store_pre_barrier(thread);
155 }
156 JRT_END
157
158 void JVMCIRuntime::new_store_pre_barrier(JavaThread* thread) {
159 // After any safepoint, just before going back to compiled code,
160 // we inform the GC that we will be doing initializing writes to
161 // this object in the future without emitting card-marks, so
162 // GC may take any compensating steps.
163 // NOTE: Keep this code consistent with GraphKit::store_barrier.
164
165 oop new_obj = thread->vm_result();
166 if (new_obj == NULL) return;
167
168 assert(Universe::heap()->can_elide_tlab_store_barriers(),
169 "compiler must check this first");
170 // GC may decide to give back a safer copy of new_obj.
171 new_obj = Universe::heap()->new_store_pre_barrier(thread, new_obj);
172 thread->set_vm_result(new_obj);
173 }
174
175 JRT_ENTRY(void, JVMCIRuntime::new_multi_array(JavaThread* thread, Klass* klass, int rank, jint* dims))
176 assert(klass->is_klass(), "not a class");
177 assert(rank >= 1, "rank must be nonzero");
178 oop obj = ArrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK);
179 thread->set_vm_result(obj);
180 JRT_END
181
182 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_array(JavaThread* thread, oopDesc* element_mirror, jint length))
183 oop obj = Reflection::reflect_new_array(element_mirror, length, CHECK);
184 thread->set_vm_result(obj);
185 JRT_END
186
187 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_instance(JavaThread* thread, oopDesc* type_mirror))
188 instanceKlassHandle klass(THREAD, java_lang_Class::as_Klass(type_mirror));
189
190 if (klass == NULL) {
191 ResourceMark rm(THREAD);
192 THROW(vmSymbols::java_lang_InstantiationException());
193 }
194
195 // Create new instance (the receiver)
196 klass->check_valid_for_instantiation(false, CHECK);
197
198 // Make sure klass gets initialized
199 klass->initialize(CHECK);
200
201 oop obj = klass->allocate_instance(CHECK);
202 thread->set_vm_result(obj);
203 JRT_END
204
205 extern void vm_exit(int code);
206
207 // Enter this method from compiled code handler below. This is where we transition
208 // to VM mode. This is done as a helper routine so that the method called directly
209 // from compiled code does not have to transition to VM. This allows the entry
210 // method to see if the nmethod that we have just looked up a handler for has
211 // been deoptimized while we were in the vm. This simplifies the assembly code
212 // cpu directories.
213 //
214 // We are entering here from exception stub (via the entry method below)
215 // If there is a compiled exception handler in this method, we will continue there;
216 // otherwise we will unwind the stack and continue at the caller of top frame method
217 // Note: we enter in Java using a special JRT wrapper. This wrapper allows us to
218 // control the area where we can allow a safepoint. After we exit the safepoint area we can
219 // check to see if the handler we are going to return is now in a nmethod that has
220 // been deoptimized. If that is the case we return the deopt blob
221 // unpack_with_exception entry instead. This makes life for the exception blob easier
222 // because making that same check and diverting is painful from assembly language.
223 JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* thread, oopDesc* ex, address pc, nmethod*& nm))
224 // Reset method handle flag.
225 thread->set_is_method_handle_return(false);
226
227 Handle exception(thread, ex);
228 nm = CodeCache::find_nmethod(pc);
229 assert(nm != NULL, "this is not a compiled method");
230 // Adjust the pc as needed/
231 if (nm->is_deopt_pc(pc)) {
232 RegisterMap map(thread, false);
233 frame exception_frame = thread->last_frame().sender(&map);
234 // if the frame isn't deopted then pc must not correspond to the caller of last_frame
235 assert(exception_frame.is_deoptimized_frame(), "must be deopted");
236 pc = exception_frame.pc();
237 }
238 #ifdef ASSERT
239 assert(exception.not_null(), "NULL exceptions should be handled by throw_exception");
240 assert(exception->is_oop(), "just checking");
241 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
242 if (!(exception->is_a(SystemDictionary::Throwable_klass()))) {
243 if (ExitVMOnVerifyError) vm_exit(-1);
244 ShouldNotReachHere();
245 }
246 #endif
247
248 // Check the stack guard pages and reenable them if necessary and there is
249 // enough space on the stack to do so. Use fast exceptions only if the guard
250 // pages are enabled.
251 bool guard_pages_enabled = thread->stack_guards_enabled();
252 if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack();
253
254 if (JvmtiExport::can_post_on_exceptions()) {
255 // To ensure correct notification of exception catches and throws
256 // we have to deoptimize here. If we attempted to notify the
257 // catches and throws during this exception lookup it's possible
258 // we could deoptimize on the way out of the VM and end back in
259 // the interpreter at the throw site. This would result in double
260 // notifications since the interpreter would also notify about
261 // these same catches and throws as it unwound the frame.
262
263 RegisterMap reg_map(thread);
264 frame stub_frame = thread->last_frame();
265 frame caller_frame = stub_frame.sender(®_map);
266
267 // We don't really want to deoptimize the nmethod itself since we
268 // can actually continue in the exception handler ourselves but I
269 // don't see an easy way to have the desired effect.
270 Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
271 assert(caller_is_deopted(), "Must be deoptimized");
272
273 return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
274 }
275
276 // ExceptionCache is used only for exceptions at call sites and not for implicit exceptions
277 if (guard_pages_enabled) {
278 address fast_continuation = nm->handler_for_exception_and_pc(exception, pc);
279 if (fast_continuation != NULL) {
280 // Set flag if return address is a method handle call site.
281 thread->set_is_method_handle_return(nm->is_method_handle_return(pc));
282 return fast_continuation;
283 }
284 }
285
286 // If the stack guard pages are enabled, check whether there is a handler in
287 // the current method. Otherwise (guard pages disabled), force an unwind and
288 // skip the exception cache update (i.e., just leave continuation==NULL).
289 address continuation = NULL;
290 if (guard_pages_enabled) {
291
292 // New exception handling mechanism can support inlined methods
293 // with exception handlers since the mappings are from PC to PC
294
295 // debugging support
296 // tracing
297 if (TraceExceptions) {
298 ttyLocker ttyl;
299 ResourceMark rm;
300 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ") thrown in compiled method <%s> at PC " INTPTR_FORMAT " for thread " INTPTR_FORMAT "",
301 exception->print_value_string(), p2i((address)exception()), nm->method()->print_value_string(), p2i(pc), p2i(thread));
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 (TraceExceptions) {
327 ttyLocker ttyl;
328 ResourceMark rm;
329 tty->print_cr("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT " 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 static bool jvmci_options_file_exists() {
635 const char* home = Arguments::get_java_home();
636 size_t path_len = strlen(home) + strlen("/lib/jvmci.options") + 1;
637 char path[JVM_MAXPATHLEN];
638 char sep = os::file_separator()[0];
639 jio_snprintf(path, JVM_MAXPATHLEN, "%s%clib%cjvmci.options", home, sep, sep);
640 struct stat st;
641 return os::stat(path, &st) == 0;
642 }
643
644 void JVMCIRuntime::initialize_HotSpotJVMCIRuntime(TRAPS) {
645 if (JNIHandles::resolve(_HotSpotJVMCIRuntime_instance) == NULL) {
646 #ifdef ASSERT
647 // This should only be called in the context of the JVMCI class being initialized
648 TempNewSymbol name = SymbolTable::new_symbol("jdk/vm/ci/runtime/JVMCI", CHECK);
649 Klass* k = SystemDictionary::resolve_or_null(name, CHECK);
650 instanceKlassHandle klass = InstanceKlass::cast(k);
651 assert(klass->is_being_initialized() && klass->is_reentrant_initialization(THREAD),
652 "HotSpotJVMCIRuntime initialization should only be triggered through JVMCI initialization");
653 #endif
654
655 bool parseOptionsFile = jvmci_options_file_exists();
656 if (_options != NULL || parseOptionsFile) {
657 JavaCallArguments args;
658 objArrayOop options;
659 if (_options != NULL) {
660 options = oopFactory::new_objArray(SystemDictionary::String_klass(), _options_count * 2, CHECK);
661 for (int i = 0; i < _options_count; i++) {
662 SystemProperty* prop = _options[i];
663 oop name = java_lang_String::create_oop_from_str(prop->key() + OPTION_PREFIX_LEN, CHECK);
664 const char* prop_value = prop->value() != NULL ? prop->value() : "";
665 oop value = java_lang_String::create_oop_from_str(prop_value, CHECK);
666 options->obj_at_put(i * 2, name);
667 options->obj_at_put((i * 2) + 1, value);
668 }
669 } else {
670 options = NULL;
671 }
672 args.push_oop(options);
673 args.push_int(parseOptionsFile);
674 callStatic("jdk/vm/ci/options/OptionsParser",
675 "parseOptionsFromVM",
676 "([Ljava/lang/String;Z)Ljava/lang/Boolean;", &args, CHECK);
677 }
678
679 if (_compiler != NULL) {
680 JavaCallArguments args;
681 oop compiler = java_lang_String::create_oop_from_str(_compiler, CHECK);
682 args.push_oop(compiler);
683 callStatic("jdk/vm/ci/hotspot/HotSpotJVMCICompilerConfig",
684 "selectCompiler",
685 "(Ljava/lang/String;)Ljava/lang/Boolean;", &args, CHECK);
686 }
687
688 Handle result = callStatic("jdk/vm/ci/hotspot/HotSpotJVMCIRuntime",
689 "runtime",
690 "()Ljdk/vm/ci/hotspot/HotSpotJVMCIRuntime;", NULL, CHECK);
691 objArrayOop trivial_prefixes = HotSpotJVMCIRuntime::trivialPrefixes(result);
692 if (trivial_prefixes != NULL) {
693 char** prefixes = NEW_C_HEAP_ARRAY(char*, trivial_prefixes->length(), mtCompiler);
694 for (int i = 0; i < trivial_prefixes->length(); i++) {
695 oop str = trivial_prefixes->obj_at(i);
696 if (str == NULL) {
697 THROW(vmSymbols::java_lang_NullPointerException());
698 } else {
699 prefixes[i] = strdup(java_lang_String::as_utf8_string(str));
700 }
701 }
702 _trivial_prefixes = prefixes;
703 _trivial_prefixes_count = trivial_prefixes->length();
704 }
705 _HotSpotJVMCIRuntime_initialized = true;
706 _HotSpotJVMCIRuntime_instance = JNIHandles::make_global(result());
707 }
708 }
709
710 void JVMCIRuntime::initialize_JVMCI(TRAPS) {
711 if (JNIHandles::resolve(_HotSpotJVMCIRuntime_instance) == NULL) {
712 callStatic("jdk/vm/ci/runtime/JVMCI",
713 "getRuntime",
714 "()Ljdk/vm/ci/runtime/JVMCIRuntime;", NULL, CHECK);
715 }
716 assert(_HotSpotJVMCIRuntime_initialized == true, "what?");
717 }
718
719 void JVMCIRuntime::initialize_well_known_classes(TRAPS) {
720 if (JVMCIRuntime::_well_known_classes_initialized == false) {
721 SystemDictionary::WKID scan = SystemDictionary::FIRST_JVMCI_WKID;
722 SystemDictionary::initialize_wk_klasses_through(SystemDictionary::LAST_JVMCI_WKID, scan, CHECK);
723 JVMCIJavaClasses::compute_offsets(CHECK);
724 JVMCIRuntime::_well_known_classes_initialized = true;
725 }
726 }
727
728 void JVMCIRuntime::metadata_do(void f(Metadata*)) {
729 // For simplicity, the existence of HotSpotJVMCIMetaAccessContext in
730 // the SystemDictionary well known classes should ensure the other
731 // classes have already been loaded, so make sure their order in the
732 // table enforces that.
733 assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedJavaMethodImpl) <
734 SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
735 assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotConstantPool) <
736 SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
737 assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedObjectTypeImpl) <
738 SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
739
740 if (HotSpotJVMCIMetaAccessContext::klass() == NULL ||
741 !HotSpotJVMCIMetaAccessContext::klass()->is_linked()) {
742 // Nothing could be registered yet
743 return;
744 }
745
746 // WeakReference<HotSpotJVMCIMetaAccessContext>[]
747 objArrayOop allContexts = HotSpotJVMCIMetaAccessContext::allContexts();
748 if (allContexts == NULL) {
749 return;
750 }
751
752 // These must be loaded at this point but the linking state doesn't matter.
753 assert(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass() != NULL, "must be loaded");
754 assert(SystemDictionary::HotSpotConstantPool_klass() != NULL, "must be loaded");
755 assert(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass() != NULL, "must be loaded");
756
757 for (int i = 0; i < allContexts->length(); i++) {
758 oop ref = allContexts->obj_at(i);
759 if (ref != NULL) {
760 oop referent = java_lang_ref_Reference::referent(ref);
761 if (referent != NULL) {
762 // Chunked Object[] with last element pointing to next chunk
763 objArrayOop metadataRoots = HotSpotJVMCIMetaAccessContext::metadataRoots(referent);
764 while (metadataRoots != NULL) {
765 for (int typeIndex = 0; typeIndex < metadataRoots->length() - 1; typeIndex++) {
766 oop reference = metadataRoots->obj_at(typeIndex);
767 if (reference == NULL) {
768 continue;
769 }
770 oop metadataRoot = java_lang_ref_Reference::referent(reference);
771 if (metadataRoot == NULL) {
772 continue;
773 }
774 if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass())) {
775 Method* method = CompilerToVM::asMethod(metadataRoot);
776 f(method);
777 } else if (metadataRoot->is_a(SystemDictionary::HotSpotConstantPool_klass())) {
778 ConstantPool* constantPool = CompilerToVM::asConstantPool(metadataRoot);
779 f(constantPool);
780 } else if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass())) {
781 Klass* klass = CompilerToVM::asKlass(metadataRoot);
782 f(klass);
783 } else {
784 metadataRoot->print();
785 ShouldNotReachHere();
786 }
787 }
788 metadataRoots = (objArrayOop)metadataRoots->obj_at(metadataRoots->length() - 1);
789 assert(metadataRoots == NULL || metadataRoots->is_objArray(), "wrong type");
790 }
791 }
792 }
793 }
794 }
795
796 // private static void CompilerToVM.registerNatives()
797 JVM_ENTRY(void, JVM_RegisterJVMCINatives(JNIEnv *env, jclass c2vmClass))
798 if (!EnableJVMCI) {
799 THROW_MSG(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled");
800 }
801
802 #ifdef _LP64
803 #ifndef TARGET_ARCH_sparc
804 uintptr_t heap_end = (uintptr_t) Universe::heap()->reserved_region().end();
805 uintptr_t allocation_end = heap_end + ((uintptr_t)16) * 1024 * 1024 * 1024;
806 guarantee(heap_end < allocation_end, "heap end too close to end of address space (might lead to erroneous TLAB allocations)");
807 #endif // TARGET_ARCH_sparc
808 #else
809 fatal("check TLAB allocation code for address space conflicts");
810 #endif
811
812 JVMCIRuntime::initialize_well_known_classes(CHECK);
813
814 {
815 ThreadToNativeFromVM trans(thread);
816 env->RegisterNatives(c2vmClass, CompilerToVM::methods, CompilerToVM::methods_count());
817 }
818 JVM_END
819
820 /**
821 * Closure for parsing a line from a *.properties file in jre/lib/jvmci/properties.
822 * The line must match the regular expression "[^=]+=.*". That is one or more
823 * characters other than '=' followed by '=' followed by zero or more characters.
824 * Everything before the '=' is the property name and everything after '=' is the value.
825 * Lines that start with '#' are treated as comments and ignored.
826 * No special processing of whitespace or any escape characters is performed.
827 * The last definition of a property "wins" (i.e., it overrides all earlier
828 * definitions of the property).
829 */
830 class JVMCIPropertiesFileClosure : public ParseClosure {
831 SystemProperty** _plist;
832 public:
833 JVMCIPropertiesFileClosure(SystemProperty** plist) : _plist(plist) {}
834 void do_line(char* line) {
835 if (line[0] == '#') {
836 // skip comment
837 return;
838 }
839 size_t len = strlen(line);
840 char* sep = strchr(line, '=');
841 if (sep == NULL) {
842 warn_and_abort("invalid format: could not find '=' character");
843 return;
844 }
845 if (sep == line) {
846 warn_and_abort("invalid format: name cannot be empty");
847 return;
848 }
849 *sep = '\0';
850 const char* name = line;
851 char* value = sep + 1;
852 Arguments::PropertyList_unique_add(_plist, name, value);
853 }
854 };
855
856 void JVMCIRuntime::init_system_properties(SystemProperty** plist) {
857 char jvmciDir[JVM_MAXPATHLEN];
858 const char* fileSep = os::file_separator();
859 jio_snprintf(jvmciDir, sizeof(jvmciDir), "%s%slib%sjvmci",
860 Arguments::get_java_home(), fileSep, fileSep, fileSep);
861 DIR* dir = os::opendir(jvmciDir);
862 if (dir != NULL) {
863 struct dirent *entry;
864 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(jvmciDir), mtInternal);
865 JVMCIPropertiesFileClosure closure(plist);
866 const unsigned suffix_len = (unsigned)strlen(".properties");
867 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL && !closure.is_aborted()) {
868 const char* name = entry->d_name;
869 if (strlen(name) > suffix_len && strcmp(name + strlen(name) - suffix_len, ".properties") == 0) {
870 char propertiesFilePath[JVM_MAXPATHLEN];
871 jio_snprintf(propertiesFilePath, sizeof(propertiesFilePath), "%s%s%s",jvmciDir, fileSep, name);
872 JVMCIRuntime::parse_lines(propertiesFilePath, &closure, false);
873 }
874 }
875 FREE_C_HEAP_ARRAY(char, dbuf);
876 os::closedir(dir);
877 }
878 }
879
880 #define CHECK_WARN_ABORT_(message) THREAD); \
881 if (HAS_PENDING_EXCEPTION) { \
882 warning(message); \
883 char buf[512]; \
884 jio_snprintf(buf, 512, "Uncaught exception at %s:%d", __FILE__, __LINE__); \
885 JVMCIRuntime::abort_on_pending_exception(PENDING_EXCEPTION, buf); \
886 return; \
887 } \
888 (void)(0
889
890 void JVMCIRuntime::save_compiler(const char* compiler) {
891 assert(compiler != NULL, "npe");
892 assert(_compiler == NULL, "cannot reassign JVMCI compiler");
893 _compiler = compiler;
894 }
895
896 void JVMCIRuntime::maybe_print_flags(TRAPS) {
897 if (_options != NULL) {
898 for (int i = 0; i < _options_count; i++) {
899 SystemProperty* p = _options[i];
900 const char* name = p->key() + OPTION_PREFIX_LEN;
901 if (strcmp(name, "PrintFlags") == 0 || strcmp(name, "ShowFlags") == 0) {
902 JVMCIRuntime::initialize_well_known_classes(CHECK);
903 HandleMark hm;
904 ResourceMark rm;
905 JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK);
906 return;
907 }
908 }
909 }
910 }
911
912 void JVMCIRuntime::save_options(SystemProperty* props) {
913 int count = 0;
914 SystemProperty* first = NULL;
915 for (SystemProperty* p = props; p != NULL; p = p->next()) {
916 if (strncmp(p->key(), OPTION_PREFIX, OPTION_PREFIX_LEN) == 0) {
917 if (first == NULL) {
918 first = p;
919 }
920 count++;
921 }
922 }
923 if (count != 0) {
924 _options_count = count;
925 _options = NEW_C_HEAP_ARRAY(SystemProperty*, count, mtCompiler);
926 _options[0] = first;
927 SystemProperty** insert_pos = _options + 1;
928 for (SystemProperty* p = first->next(); p != NULL; p = p->next()) {
929 if (strncmp(p->key(), OPTION_PREFIX, OPTION_PREFIX_LEN) == 0) {
930 *insert_pos = p;
931 insert_pos++;
932 }
933 }
934 assert (insert_pos - _options == count, "must be");
935 }
936 }
937
938 void JVMCIRuntime::shutdown() {
939 if (_HotSpotJVMCIRuntime_instance != NULL) {
940 _shutdown_called = true;
941 JavaThread* THREAD = JavaThread::current();
942 HandleMark hm(THREAD);
943 Handle receiver = get_HotSpotJVMCIRuntime(CHECK_ABORT);
944 JavaValue result(T_VOID);
945 JavaCallArguments args;
946 args.push_oop(receiver);
947 JavaCalls::call_special(&result, receiver->klass(), vmSymbols::shutdown_method_name(), vmSymbols::void_method_signature(), &args, CHECK_ABORT);
948 }
949 }
950
951 bool JVMCIRuntime::treat_as_trivial(Method* method) {
952 if (_HotSpotJVMCIRuntime_initialized) {
953 oop loader = method->method_holder()->class_loader();
954 if (loader == NULL) {
955 for (int i = 0; i < _trivial_prefixes_count; i++) {
956 if (method->method_holder()->name()->starts_with(_trivial_prefixes[i])) {
957 return true;
958 }
959 }
960 }
961 }
962 return false;
963 }
964
965 void JVMCIRuntime::call_printStackTrace(Handle exception, Thread* thread) {
966 assert(exception->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
967 JavaValue result(T_VOID);
968 JavaCalls::call_virtual(&result,
969 exception,
970 KlassHandle(thread,
971 SystemDictionary::Throwable_klass()),
972 vmSymbols::printStackTrace_name(),
973 vmSymbols::void_method_signature(),
974 thread);
975 }
976
977 void JVMCIRuntime::abort_on_pending_exception(Handle exception, const char* message, bool dump_core) {
978 Thread* THREAD = Thread::current();
979 CLEAR_PENDING_EXCEPTION;
980 tty->print_raw_cr(message);
981 call_printStackTrace(exception, THREAD);
982
983 // Give other aborting threads to also print their stack traces.
984 // This can be very useful when debugging class initialization
985 // failures.
986 os::sleep(THREAD, 200, false);
987
988 vm_abort(dump_core);
989 }
990
991 void JVMCIRuntime::parse_lines(char* path, ParseClosure* closure, bool warnStatFailure) {
992 struct stat st;
993 if (::stat(path, &st) == 0 && (st.st_mode & S_IFREG) == S_IFREG) { // exists & is regular file
994 int file_handle = ::open(path, os::default_file_open_flags(), 0);
995 if (file_handle != -1) {
996 char* buffer = NEW_C_HEAP_ARRAY(char, st.st_size + 1, mtInternal);
997 int num_read;
998 num_read = (int) ::read(file_handle, (char*) buffer, st.st_size);
999 if (num_read == -1) {
1000 warning("Error reading file %s due to %s", path, strerror(errno));
1001 } else if (num_read != st.st_size) {
1002 warning("Only read %d of " SIZE_FORMAT " bytes from %s", num_read, (size_t) st.st_size, path);
1003 }
1004 ::close(file_handle);
1005 closure->set_filename(path);
1006 if (num_read == st.st_size) {
1007 buffer[num_read] = '\0';
1008
1009 char* line = buffer;
1010 while (line - buffer < num_read && !closure->is_aborted()) {
1011 // find line end (\r, \n or \r\n)
1012 char* nextline = NULL;
1013 char* cr = strchr(line, '\r');
1014 char* lf = strchr(line, '\n');
1015 if (cr != NULL && lf != NULL) {
1016 char* min = MIN2(cr, lf);
1017 *min = '\0';
1018 if (lf == cr + 1) {
1019 nextline = lf + 1;
1020 } else {
1021 nextline = min + 1;
1022 }
1023 } else if (cr != NULL) {
1024 *cr = '\0';
1025 nextline = cr + 1;
1026 } else if (lf != NULL) {
1027 *lf = '\0';
1028 nextline = lf + 1;
1029 }
1030 // trim left
1031 while (*line == ' ' || *line == '\t') line++;
1032 char* end = line + strlen(line);
1033 // trim right
1034 while (end > line && (*(end -1) == ' ' || *(end -1) == '\t')) end--;
1035 *end = '\0';
1036 // skip comments and empty lines
1037 if (*line != '#' && strlen(line) > 0) {
1038 closure->parse_line(line);
1039 }
1040 if (nextline != NULL) {
1041 line = nextline;
1042 } else {
1043 // File without newline at the end
1044 break;
1045 }
1046 }
1047 }
1048 FREE_C_HEAP_ARRAY(char, buffer);
1049 } else {
1050 warning("Error opening file %s due to %s", path, strerror(errno));
1051 }
1052 } else if (warnStatFailure) {
1053 warning("Could not stat file %s due to %s", path, strerror(errno));
1054 }
1055 }