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 bool JVMCIRuntime::_shutdown_called = false;
56
57 static const char* OPTION_PREFIX = "jvmci.option.";
58 static const size_t OPTION_PREFIX_LEN = strlen(OPTION_PREFIX);
59
60 BasicType JVMCIRuntime::kindToBasicType(jchar ch) {
61 switch(ch) {
62 case 'z': return T_BOOLEAN;
63 case 'b': return T_BYTE;
64 case 's': return T_SHORT;
65 case 'c': return T_CHAR;
66 case 'i': return T_INT;
67 case 'f': return T_FLOAT;
68 case 'j': return T_LONG;
69 case 'd': return T_DOUBLE;
70 case 'a': return T_OBJECT;
71 case '-': return T_ILLEGAL;
72 default:
73 fatal("unexpected Kind: %c", ch);
74 break;
75 }
76 return T_ILLEGAL;
77 }
78
79 // Simple helper to see if the caller of a runtime stub which
80 // entered the VM has been deoptimized
81
82 static bool caller_is_deopted() {
83 JavaThread* thread = JavaThread::current();
84 RegisterMap reg_map(thread, false);
85 frame runtime_frame = thread->last_frame();
86 frame caller_frame = runtime_frame.sender(®_map);
87 assert(caller_frame.is_compiled_frame(), "must be compiled");
88 return caller_frame.is_deoptimized_frame();
89 }
90
91 // Stress deoptimization
92 static void deopt_caller() {
93 if ( !caller_is_deopted()) {
94 JavaThread* thread = JavaThread::current();
95 RegisterMap reg_map(thread, false);
96 frame runtime_frame = thread->last_frame();
97 frame caller_frame = runtime_frame.sender(®_map);
98 Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
99 assert(caller_is_deopted(), "Must be deoptimized");
100 }
101 }
102
103 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_instance(JavaThread* thread, Klass* klass))
104 JRT_BLOCK;
105 assert(klass->is_klass(), "not a class");
106 instanceKlassHandle h(thread, klass);
107 h->check_valid_for_instantiation(true, CHECK);
108 // make sure klass is initialized
109 h->initialize(CHECK);
110 // allocate instance and return via TLS
111 oop obj = h->allocate_instance(CHECK);
112 thread->set_vm_result(obj);
113 JRT_BLOCK_END;
114
115 if (ReduceInitialCardMarks) {
116 new_store_pre_barrier(thread);
117 }
118 JRT_END
119
120 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_array(JavaThread* thread, Klass* array_klass, jint length))
121 JRT_BLOCK;
122 // Note: no handle for klass needed since they are not used
123 // anymore after new_objArray() and no GC can happen before.
124 // (This may have to change if this code changes!)
125 assert(array_klass->is_klass(), "not a class");
126 oop obj;
127 if (array_klass->oop_is_typeArray()) {
128 BasicType elt_type = TypeArrayKlass::cast(array_klass)->element_type();
129 obj = oopFactory::new_typeArray(elt_type, length, CHECK);
130 } else {
131 Klass* elem_klass = ObjArrayKlass::cast(array_klass)->element_klass();
132 obj = oopFactory::new_objArray(elem_klass, length, CHECK);
133 }
134 thread->set_vm_result(obj);
135 // This is pretty rare but this runtime patch is stressful to deoptimization
136 // if we deoptimize here so force a deopt to stress the path.
137 if (DeoptimizeALot) {
138 static int deopts = 0;
139 // Alternate between deoptimizing and raising an error (which will also cause a deopt)
140 if (deopts++ % 2 == 0) {
141 ResourceMark rm(THREAD);
142 THROW(vmSymbols::java_lang_OutOfMemoryError());
143 } else {
144 deopt_caller();
145 }
146 }
147 JRT_BLOCK_END;
148
149 if (ReduceInitialCardMarks) {
150 new_store_pre_barrier(thread);
151 }
152 JRT_END
153
154 void JVMCIRuntime::new_store_pre_barrier(JavaThread* thread) {
155 // After any safepoint, just before going back to compiled code,
156 // we inform the GC that we will be doing initializing writes to
157 // this object in the future without emitting card-marks, so
158 // GC may take any compensating steps.
159 // NOTE: Keep this code consistent with GraphKit::store_barrier.
160
161 oop new_obj = thread->vm_result();
162 if (new_obj == NULL) return;
163
164 assert(Universe::heap()->can_elide_tlab_store_barriers(),
165 "compiler must check this first");
166 // GC may decide to give back a safer copy of new_obj.
167 new_obj = Universe::heap()->new_store_pre_barrier(thread, new_obj);
168 thread->set_vm_result(new_obj);
169 }
170
171 JRT_ENTRY(void, JVMCIRuntime::new_multi_array(JavaThread* thread, Klass* klass, int rank, jint* dims))
172 assert(klass->is_klass(), "not a class");
173 assert(rank >= 1, "rank must be nonzero");
174 oop obj = ArrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK);
175 thread->set_vm_result(obj);
176 JRT_END
177
178 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_array(JavaThread* thread, oopDesc* element_mirror, jint length))
179 oop obj = Reflection::reflect_new_array(element_mirror, length, CHECK);
180 thread->set_vm_result(obj);
181 JRT_END
182
183 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_instance(JavaThread* thread, oopDesc* type_mirror))
184 instanceKlassHandle klass(THREAD, java_lang_Class::as_Klass(type_mirror));
185
186 if (klass == NULL) {
187 ResourceMark rm(THREAD);
188 THROW(vmSymbols::java_lang_InstantiationException());
189 }
190
191 // Create new instance (the receiver)
192 klass->check_valid_for_instantiation(false, CHECK);
193
194 // Make sure klass gets initialized
195 klass->initialize(CHECK);
196
197 oop obj = klass->allocate_instance(CHECK);
198 thread->set_vm_result(obj);
199 JRT_END
200
201 extern void vm_exit(int code);
202
203 // Enter this method from compiled code handler below. This is where we transition
204 // to VM mode. This is done as a helper routine so that the method called directly
205 // from compiled code does not have to transition to VM. This allows the entry
206 // method to see if the nmethod that we have just looked up a handler for has
207 // been deoptimized while we were in the vm. This simplifies the assembly code
208 // cpu directories.
209 //
210 // We are entering here from exception stub (via the entry method below)
211 // If there is a compiled exception handler in this method, we will continue there;
212 // otherwise we will unwind the stack and continue at the caller of top frame method
213 // Note: we enter in Java using a special JRT wrapper. This wrapper allows us to
214 // control the area where we can allow a safepoint. After we exit the safepoint area we can
215 // check to see if the handler we are going to return is now in a nmethod that has
216 // been deoptimized. If that is the case we return the deopt blob
217 // unpack_with_exception entry instead. This makes life for the exception blob easier
218 // because making that same check and diverting is painful from assembly language.
219 JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* thread, oopDesc* ex, address pc, nmethod*& nm))
220 // Reset method handle flag.
221 thread->set_is_method_handle_return(false);
222
223 Handle exception(thread, ex);
224 nm = CodeCache::find_nmethod(pc);
225 assert(nm != NULL, "this is not a compiled method");
226 // Adjust the pc as needed/
227 if (nm->is_deopt_pc(pc)) {
228 RegisterMap map(thread, false);
229 frame exception_frame = thread->last_frame().sender(&map);
230 // if the frame isn't deopted then pc must not correspond to the caller of last_frame
231 assert(exception_frame.is_deoptimized_frame(), "must be deopted");
232 pc = exception_frame.pc();
233 }
234 #ifdef ASSERT
235 assert(exception.not_null(), "NULL exceptions should be handled by throw_exception");
236 assert(exception->is_oop(), "just checking");
237 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
238 if (!(exception->is_a(SystemDictionary::Throwable_klass()))) {
239 if (ExitVMOnVerifyError) vm_exit(-1);
240 ShouldNotReachHere();
241 }
242 #endif
243
244 // Check the stack guard pages and reenable them if necessary and there is
245 // enough space on the stack to do so. Use fast exceptions only if the guard
246 // pages are enabled.
247 bool guard_pages_enabled = thread->stack_yellow_zone_enabled();
248 if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack();
249
250 if (JvmtiExport::can_post_on_exceptions()) {
251 // To ensure correct notification of exception catches and throws
252 // we have to deoptimize here. If we attempted to notify the
253 // catches and throws during this exception lookup it's possible
254 // we could deoptimize on the way out of the VM and end back in
255 // the interpreter at the throw site. This would result in double
256 // notifications since the interpreter would also notify about
257 // these same catches and throws as it unwound the frame.
258
259 RegisterMap reg_map(thread);
260 frame stub_frame = thread->last_frame();
261 frame caller_frame = stub_frame.sender(®_map);
262
263 // We don't really want to deoptimize the nmethod itself since we
264 // can actually continue in the exception handler ourselves but I
265 // don't see an easy way to have the desired effect.
266 Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
267 assert(caller_is_deopted(), "Must be deoptimized");
268
269 return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
270 }
271
272 // ExceptionCache is used only for exceptions at call sites and not for implicit exceptions
273 if (guard_pages_enabled) {
274 address fast_continuation = nm->handler_for_exception_and_pc(exception, pc);
275 if (fast_continuation != NULL) {
276 // Set flag if return address is a method handle call site.
277 thread->set_is_method_handle_return(nm->is_method_handle_return(pc));
278 return fast_continuation;
279 }
280 }
281
282 // If the stack guard pages are enabled, check whether there is a handler in
283 // the current method. Otherwise (guard pages disabled), force an unwind and
284 // skip the exception cache update (i.e., just leave continuation==NULL).
285 address continuation = NULL;
286 if (guard_pages_enabled) {
287
288 // New exception handling mechanism can support inlined methods
289 // with exception handlers since the mappings are from PC to PC
290
291 // debugging support
292 // tracing
293 if (TraceExceptions) {
294 ttyLocker ttyl;
295 ResourceMark rm;
296 tty->print_cr("Exception <%s> (" INTPTR_FORMAT ") thrown in compiled method <%s> at PC " INTPTR_FORMAT " for thread " INTPTR_FORMAT "",
297 exception->print_value_string(), p2i((address)exception()), nm->method()->print_value_string(), p2i(pc), p2i(thread));
298 }
299 // for AbortVMOnException flag
300 NOT_PRODUCT(Exceptions::debug_check_abort(exception));
301
302 // Clear out the exception oop and pc since looking up an
303 // exception handler can cause class loading, which might throw an
304 // exception and those fields are expected to be clear during
305 // normal bytecode execution.
306 thread->clear_exception_oop_and_pc();
307
308 continuation = SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, false, false);
309 // If an exception was thrown during exception dispatch, the exception oop may have changed
310 thread->set_exception_oop(exception());
311 thread->set_exception_pc(pc);
312
313 // the exception cache is used only by non-implicit exceptions
314 if (continuation != NULL && !SharedRuntime::deopt_blob()->contains(continuation)) {
315 nm->add_handler_for_exception_and_pc(exception, pc, continuation);
316 }
317 }
318
319 // Set flag if return address is a method handle call site.
320 thread->set_is_method_handle_return(nm->is_method_handle_return(pc));
321
322 if (TraceExceptions) {
323 ttyLocker ttyl;
324 ResourceMark rm;
325 tty->print_cr("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT " for exception thrown at PC " PTR_FORMAT,
326 p2i(thread), p2i(continuation), p2i(pc));
327 }
328
329 return continuation;
330 JRT_END
331
332 // Enter this method from compiled code only if there is a Java exception handler
333 // in the method handling the exception.
334 // We are entering here from exception stub. We don't do a normal VM transition here.
335 // We do it in a helper. This is so we can check to see if the nmethod we have just
336 // searched for an exception handler has been deoptimized in the meantime.
337 address JVMCIRuntime::exception_handler_for_pc(JavaThread* thread) {
338 oop exception = thread->exception_oop();
339 address pc = thread->exception_pc();
340 // Still in Java mode
341 DEBUG_ONLY(ResetNoHandleMark rnhm);
342 nmethod* nm = NULL;
343 address continuation = NULL;
344 {
345 // Enter VM mode by calling the helper
346 ResetNoHandleMark rnhm;
347 continuation = exception_handler_for_pc_helper(thread, exception, pc, nm);
348 }
349 // Back in JAVA, use no oops DON'T safepoint
350
351 // Now check to see if the compiled method we were called from is now deoptimized.
352 // If so we must return to the deopt blob and deoptimize the nmethod
353 if (nm != NULL && caller_is_deopted()) {
354 continuation = SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
355 }
356
357 assert(continuation != NULL, "no handler found");
358 return continuation;
359 }
360
361 JRT_ENTRY(void, JVMCIRuntime::create_null_exception(JavaThread* thread))
362 SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException());
363 thread->set_vm_result(PENDING_EXCEPTION);
364 CLEAR_PENDING_EXCEPTION;
365 JRT_END
366
367 JRT_ENTRY(void, JVMCIRuntime::create_out_of_bounds_exception(JavaThread* thread, jint index))
368 char message[jintAsStringSize];
369 sprintf(message, "%d", index);
370 SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), message);
371 thread->set_vm_result(PENDING_EXCEPTION);
372 CLEAR_PENDING_EXCEPTION;
373 JRT_END
374
375 JRT_ENTRY_NO_ASYNC(void, JVMCIRuntime::monitorenter(JavaThread* thread, oopDesc* obj, BasicLock* lock))
376 IF_TRACE_jvmci_3 {
377 char type[O_BUFLEN];
378 obj->klass()->name()->as_C_string(type, O_BUFLEN);
379 markOop mark = obj->mark();
380 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));
381 tty->flush();
382 }
383 #ifdef ASSERT
384 if (PrintBiasedLockingStatistics) {
385 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
386 }
387 #endif
388 Handle h_obj(thread, obj);
389 assert(h_obj()->is_oop(), "must be NULL or an object");
390 if (UseBiasedLocking) {
391 // Retry fast entry if bias is revoked to avoid unnecessary inflation
392 ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK);
393 } else {
394 if (JVMCIUseFastLocking) {
395 // When using fast locking, the compiled code has already tried the fast case
396 ObjectSynchronizer::slow_enter(h_obj, lock, THREAD);
397 } else {
398 ObjectSynchronizer::fast_enter(h_obj, lock, false, THREAD);
399 }
400 }
401 TRACE_jvmci_3("%s: exiting locking slow with obj=" INTPTR_FORMAT, thread->name(), p2i(obj));
402 JRT_END
403
404 JRT_LEAF(void, JVMCIRuntime::monitorexit(JavaThread* thread, oopDesc* obj, BasicLock* lock))
405 assert(thread == JavaThread::current(), "threads must correspond");
406 assert(thread->last_Java_sp(), "last_Java_sp must be set");
407 // monitorexit is non-blocking (leaf routine) => no exceptions can be thrown
408 EXCEPTION_MARK;
409
410 #ifdef DEBUG
411 if (!obj->is_oop()) {
412 ResetNoHandleMark rhm;
413 nmethod* method = thread->last_frame().cb()->as_nmethod_or_null();
414 if (method != NULL) {
415 tty->print_cr("ERROR in monitorexit in method %s wrong obj " INTPTR_FORMAT, method->name(), p2i(obj));
416 }
417 thread->print_stack_on(tty);
418 assert(false, "invalid lock object pointer dected");
419 }
420 #endif
421
422 if (JVMCIUseFastLocking) {
423 // When using fast locking, the compiled code has already tried the fast case
424 ObjectSynchronizer::slow_exit(obj, lock, THREAD);
425 } else {
426 ObjectSynchronizer::fast_exit(obj, lock, THREAD);
427 }
428 IF_TRACE_jvmci_3 {
429 char type[O_BUFLEN];
430 obj->klass()->name()->as_C_string(type, O_BUFLEN);
431 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));
432 tty->flush();
433 }
434 JRT_END
435
436 JRT_LEAF(void, JVMCIRuntime::log_object(JavaThread* thread, oopDesc* obj, jint flags))
437 bool string = mask_bits_are_true(flags, LOG_OBJECT_STRING);
438 bool addr = mask_bits_are_true(flags, LOG_OBJECT_ADDRESS);
439 bool newline = mask_bits_are_true(flags, LOG_OBJECT_NEWLINE);
440 if (!string) {
441 if (!addr && obj->is_oop_or_null(true)) {
442 char buf[O_BUFLEN];
443 tty->print("%s@" INTPTR_FORMAT, obj->klass()->name()->as_C_string(buf, O_BUFLEN), p2i(obj));
444 } else {
445 tty->print(INTPTR_FORMAT, p2i(obj));
446 }
447 } else {
448 ResourceMark rm;
449 assert(obj != NULL && java_lang_String::is_instance(obj), "must be");
450 char *buf = java_lang_String::as_utf8_string(obj);
451 tty->print_raw(buf);
452 }
453 if (newline) {
454 tty->cr();
455 }
456 JRT_END
457
458 JRT_LEAF(void, JVMCIRuntime::write_barrier_pre(JavaThread* thread, oopDesc* obj))
459 thread->satb_mark_queue().enqueue(obj);
460 JRT_END
461
462 JRT_LEAF(void, JVMCIRuntime::write_barrier_post(JavaThread* thread, void* card_addr))
463 thread->dirty_card_queue().enqueue(card_addr);
464 JRT_END
465
466 JRT_LEAF(jboolean, JVMCIRuntime::validate_object(JavaThread* thread, oopDesc* parent, oopDesc* child))
467 bool ret = true;
468 if(!Universe::heap()->is_in_closed_subset(parent)) {
469 tty->print_cr("Parent Object " INTPTR_FORMAT " not in heap", p2i(parent));
470 parent->print();
471 ret=false;
472 }
473 if(!Universe::heap()->is_in_closed_subset(child)) {
474 tty->print_cr("Child Object " INTPTR_FORMAT " not in heap", p2i(child));
475 child->print();
476 ret=false;
477 }
478 return (jint)ret;
479 JRT_END
480
481 JRT_ENTRY(void, JVMCIRuntime::vm_error(JavaThread* thread, jlong where, jlong format, jlong value))
482 ResourceMark rm;
483 const char *error_msg = where == 0L ? "<internal JVMCI error>" : (char*) (address) where;
484 char *detail_msg = NULL;
485 if (format != 0L) {
486 const char* buf = (char*) (address) format;
487 size_t detail_msg_length = strlen(buf) * 2;
488 detail_msg = (char *) NEW_RESOURCE_ARRAY(u_char, detail_msg_length);
489 jio_snprintf(detail_msg, detail_msg_length, buf, value);
490 report_vm_error(__FILE__, __LINE__, error_msg, "%s", detail_msg);
491 } else {
492 report_vm_error(__FILE__, __LINE__, error_msg);
493 }
494 JRT_END
495
496 JRT_LEAF(oopDesc*, JVMCIRuntime::load_and_clear_exception(JavaThread* thread))
497 oop exception = thread->exception_oop();
498 assert(exception != NULL, "npe");
499 thread->set_exception_oop(NULL);
500 thread->set_exception_pc(0);
501 return exception;
502 JRT_END
503
504 PRAGMA_DIAG_PUSH
505 PRAGMA_FORMAT_NONLITERAL_IGNORED
506 JRT_LEAF(void, JVMCIRuntime::log_printf(JavaThread* thread, oopDesc* format, jlong v1, jlong v2, jlong v3))
507 ResourceMark rm;
508 assert(format != NULL && java_lang_String::is_instance(format), "must be");
509 char *buf = java_lang_String::as_utf8_string(format);
510 tty->print((const char*)buf, v1, v2, v3);
511 JRT_END
512 PRAGMA_DIAG_POP
513
514 static void decipher(jlong v, bool ignoreZero) {
515 if (v != 0 || !ignoreZero) {
516 void* p = (void *)(address) v;
517 CodeBlob* cb = CodeCache::find_blob(p);
518 if (cb) {
519 if (cb->is_nmethod()) {
520 char buf[O_BUFLEN];
521 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()));
522 return;
523 }
524 cb->print_value_on(tty);
525 return;
526 }
527 if (Universe::heap()->is_in(p)) {
528 oop obj = oop(p);
529 obj->print_value_on(tty);
530 return;
531 }
532 tty->print(INTPTR_FORMAT " [long: " JLONG_FORMAT ", double %lf, char %c]",p2i((void *)v), (jlong)v, (jdouble)v, (char)v);
533 }
534 }
535
536 PRAGMA_DIAG_PUSH
537 PRAGMA_FORMAT_NONLITERAL_IGNORED
538 JRT_LEAF(void, JVMCIRuntime::vm_message(jboolean vmError, jlong format, jlong v1, jlong v2, jlong v3))
539 ResourceMark rm;
540 const char *buf = (const char*) (address) format;
541 if (vmError) {
542 if (buf != NULL) {
543 fatal(buf, v1, v2, v3);
544 } else {
545 fatal("<anonymous error>");
546 }
547 } else if (buf != NULL) {
548 tty->print(buf, v1, v2, v3);
549 } else {
550 assert(v2 == 0, "v2 != 0");
551 assert(v3 == 0, "v3 != 0");
552 decipher(v1, false);
553 }
554 JRT_END
555 PRAGMA_DIAG_POP
556
557 JRT_LEAF(void, JVMCIRuntime::log_primitive(JavaThread* thread, jchar typeChar, jlong value, jboolean newline))
558 union {
559 jlong l;
560 jdouble d;
561 jfloat f;
562 } uu;
563 uu.l = value;
564 switch (typeChar) {
565 case 'z': tty->print(value == 0 ? "false" : "true"); break;
566 case 'b': tty->print("%d", (jbyte) value); break;
567 case 'c': tty->print("%c", (jchar) value); break;
568 case 's': tty->print("%d", (jshort) value); break;
569 case 'i': tty->print("%d", (jint) value); break;
570 case 'f': tty->print("%f", uu.f); break;
571 case 'j': tty->print(JLONG_FORMAT, value); break;
572 case 'd': tty->print("%lf", uu.d); break;
573 default: assert(false, "unknown typeChar"); break;
574 }
575 if (newline) {
576 tty->cr();
577 }
578 JRT_END
579
580 JRT_ENTRY(jint, JVMCIRuntime::identity_hash_code(JavaThread* thread, oopDesc* obj))
581 return (jint) obj->identity_hash();
582 JRT_END
583
584 JRT_ENTRY(jboolean, JVMCIRuntime::thread_is_interrupted(JavaThread* thread, oopDesc* receiver, jboolean clear_interrupted))
585 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
586 // This locking requires thread_in_vm which is why this method cannot be JRT_LEAF.
587 Handle receiverHandle(thread, receiver);
588 MutexLockerEx ml(thread->threadObj() == (void*)receiver ? NULL : Threads_lock);
589 JavaThread* receiverThread = java_lang_Thread::thread(receiverHandle());
590 if (receiverThread == NULL) {
591 // The other thread may exit during this process, which is ok so return false.
592 return JNI_FALSE;
593 } else {
594 return (jint) Thread::is_interrupted(receiverThread, clear_interrupted != 0);
595 }
596 JRT_END
597
598 JRT_ENTRY(jint, JVMCIRuntime::test_deoptimize_call_int(JavaThread* thread, int value))
599 deopt_caller();
600 return value;
601 JRT_END
602
603 // private static JVMCIRuntime JVMCI.initializeRuntime()
604 JVM_ENTRY(jobject, JVM_GetJVMCIRuntime(JNIEnv *env, jclass c))
605 if (!EnableJVMCI) {
606 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled")
607 }
608 JVMCIRuntime::initialize_HotSpotJVMCIRuntime(CHECK_NULL);
609 jobject ret = JVMCIRuntime::get_HotSpotJVMCIRuntime_jobject(CHECK_NULL);
610 return ret;
611 JVM_END
612
613 Handle JVMCIRuntime::callStatic(const char* className, const char* methodName, const char* signature, JavaCallArguments* args, TRAPS) {
614 guarantee(!_HotSpotJVMCIRuntime_initialized, "cannot reinitialize HotSpotJVMCIRuntime");
615
616 TempNewSymbol name = SymbolTable::new_symbol(className, CHECK_(Handle()));
617 KlassHandle klass = SystemDictionary::resolve_or_fail(name, true, CHECK_(Handle()));
618 TempNewSymbol runtime = SymbolTable::new_symbol(methodName, CHECK_(Handle()));
619 TempNewSymbol sig = SymbolTable::new_symbol(signature, CHECK_(Handle()));
620 JavaValue result(T_OBJECT);
621 if (args == NULL) {
622 JavaCalls::call_static(&result, klass, runtime, sig, CHECK_(Handle()));
623 } else {
624 JavaCalls::call_static(&result, klass, runtime, sig, args, CHECK_(Handle()));
625 }
626 return Handle((oop)result.get_jobject());
627 }
628
629 static bool jvmci_options_file_exists() {
630 const char* home = Arguments::get_java_home();
631 size_t path_len = strlen(home) + strlen("/lib/jvmci/options") + 1;
632 char path[JVM_MAXPATHLEN];
633 char sep = os::file_separator()[0];
634 jio_snprintf(path, JVM_MAXPATHLEN, "%s%clib%cjvmci%coptions", home, sep, sep, sep);
635 struct stat st;
636 return os::stat(path, &st) == 0;
637 }
638
639 void JVMCIRuntime::initialize_HotSpotJVMCIRuntime(TRAPS) {
640 if (JNIHandles::resolve(_HotSpotJVMCIRuntime_instance) == NULL) {
641 #ifdef ASSERT
642 // This should only be called in the context of the JVMCI class being initialized
643 TempNewSymbol name = SymbolTable::new_symbol("jdk/vm/ci/runtime/JVMCI", CHECK);
644 Klass* k = SystemDictionary::resolve_or_null(name, CHECK);
645 instanceKlassHandle klass = InstanceKlass::cast(k);
646 assert(klass->is_being_initialized() && klass->is_reentrant_initialization(THREAD),
647 "HotSpotJVMCIRuntime initialization should only be triggered through JVMCI initialization");
648 #endif
649
650 bool parseOptionsFile = jvmci_options_file_exists();
651 if (_options != NULL || parseOptionsFile) {
652 JavaCallArguments args;
653 objArrayOop options;
654 if (_options != NULL) {
655 options = oopFactory::new_objArray(SystemDictionary::String_klass(), _options_count * 2, CHECK);
656 for (int i = 0; i < _options_count; i++) {
657 SystemProperty* prop = _options[i];
658 oop name = java_lang_String::create_oop_from_str(prop->key() + OPTION_PREFIX_LEN, CHECK);
659 oop value = java_lang_String::create_oop_from_str(prop->value(), CHECK);
660 options->obj_at_put(i * 2, name);
661 options->obj_at_put((i * 2) + 1, value);
662 }
663 } else {
664 options = NULL;
665 }
666 args.push_oop(options);
667 args.push_int(parseOptionsFile);
668 callStatic("jdk/vm/ci/options/OptionsParser",
669 "parseOptionsFromVM",
670 "([Ljava/lang/String;Z)Ljava/lang/Boolean;", &args, CHECK);
671 }
672
673 if (_compiler != NULL) {
674 JavaCallArguments args;
675 oop compiler = java_lang_String::create_oop_from_str(_compiler, CHECK);
676 args.push_oop(compiler);
677 callStatic("jdk/vm/ci/hotspot/HotSpotJVMCICompilerConfig",
678 "selectCompiler",
679 "(Ljava/lang/String;)Ljava/lang/Boolean;", &args, CHECK);
680 }
681
682 Handle result = callStatic("jdk/vm/ci/hotspot/HotSpotJVMCIRuntime",
683 "runtime",
684 "()Ljdk/vm/ci/hotspot/HotSpotJVMCIRuntime;", NULL, CHECK);
685 _HotSpotJVMCIRuntime_initialized = true;
686 _HotSpotJVMCIRuntime_instance = JNIHandles::make_global(result());
687 }
688 }
689
690 void 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
699 void JVMCIRuntime::initialize_well_known_classes(TRAPS) {
700 if (JVMCIRuntime::_well_known_classes_initialized == false) {
701 SystemDictionary::WKID scan = SystemDictionary::FIRST_JVMCI_WKID;
702 SystemDictionary::initialize_wk_klasses_through(SystemDictionary::LAST_JVMCI_WKID, scan, CHECK);
703 JVMCIJavaClasses::compute_offsets();
704 JVMCIRuntime::_well_known_classes_initialized = true;
705 }
706 }
707
708 void JVMCIRuntime::metadata_do(void f(Metadata*)) {
709 // For simplicity, the existence of HotSpotJVMCIMetaAccessContext in
710 // the SystemDictionary well known classes should ensure the other
711 // classes have already been loaded, so make sure their order in the
712 // table enforces that.
713 assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedJavaMethodImpl) <
714 SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
715 assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotConstantPool) <
716 SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
717 assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedObjectTypeImpl) <
718 SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
719
720 if (HotSpotJVMCIMetaAccessContext::klass() == NULL ||
721 !HotSpotJVMCIMetaAccessContext::klass()->is_linked()) {
722 // Nothing could be registered yet
723 return;
724 }
725
726 // WeakReference<HotSpotJVMCIMetaAccessContext>[]
727 objArrayOop allContexts = HotSpotJVMCIMetaAccessContext::allContexts();
728 if (allContexts == NULL) {
729 return;
730 }
731
732 // These must be loaded at this point but the linking state doesn't matter.
733 assert(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass() != NULL, "must be loaded");
734 assert(SystemDictionary::HotSpotConstantPool_klass() != NULL, "must be loaded");
735 assert(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass() != NULL, "must be loaded");
736
737 for (int i = 0; i < allContexts->length(); i++) {
738 oop ref = allContexts->obj_at(i);
739 if (ref != NULL) {
740 oop referent = java_lang_ref_Reference::referent(ref);
741 if (referent != NULL) {
742 // Chunked Object[] with last element pointing to next chunk
743 objArrayOop metadataRoots = HotSpotJVMCIMetaAccessContext::metadataRoots(referent);
744 while (metadataRoots != NULL) {
745 for (int typeIndex = 0; typeIndex < metadataRoots->length() - 1; typeIndex++) {
746 oop reference = metadataRoots->obj_at(typeIndex);
747 if (reference == NULL) {
748 continue;
749 }
750 oop metadataRoot = java_lang_ref_Reference::referent(reference);
751 if (metadataRoot == NULL) {
752 continue;
753 }
754 if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass())) {
755 Method* method = CompilerToVM::asMethod(metadataRoot);
756 f(method);
757 } else if (metadataRoot->is_a(SystemDictionary::HotSpotConstantPool_klass())) {
758 ConstantPool* constantPool = CompilerToVM::asConstantPool(metadataRoot);
759 f(constantPool);
760 } else if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass())) {
761 Klass* klass = CompilerToVM::asKlass(metadataRoot);
762 f(klass);
763 } else {
764 metadataRoot->print();
765 ShouldNotReachHere();
766 }
767 }
768 metadataRoots = (objArrayOop)metadataRoots->obj_at(metadataRoots->length() - 1);
769 assert(metadataRoots == NULL || metadataRoots->is_objArray(), "wrong type");
770 }
771 }
772 }
773 }
774 }
775
776 // private static void CompilerToVM.registerNatives()
777 JVM_ENTRY(void, JVM_RegisterJVMCINatives(JNIEnv *env, jclass c2vmClass))
778 if (!EnableJVMCI) {
779 THROW_MSG(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled");
780 }
781
782 #ifdef _LP64
783 #ifndef TARGET_ARCH_sparc
784 uintptr_t heap_end = (uintptr_t) Universe::heap()->reserved_region().end();
785 uintptr_t allocation_end = heap_end + ((uintptr_t)16) * 1024 * 1024 * 1024;
786 guarantee(heap_end < allocation_end, "heap end too close to end of address space (might lead to erroneous TLAB allocations)");
787 #endif // TARGET_ARCH_sparc
788 #else
789 fatal("check TLAB allocation code for address space conflicts");
790 #endif
791
792 JVMCIRuntime::initialize_well_known_classes(CHECK);
793
794 {
795 ThreadToNativeFromVM trans(thread);
796
797 // Ensure _non_oop_bits is initialized
798 Universe::non_oop_word();
799
800 env->RegisterNatives(c2vmClass, CompilerToVM::methods, CompilerToVM::methods_count());
801 }
802 JVM_END
803
804 /**
805 * Closure for parsing a line from a *.properties file in jre/lib/jvmci/properties.
806 * The line must match the regular expression "[^=]+=.*". That is one or more
807 * characters other than '=' followed by '=' followed by zero or more characters.
808 * Everything before the '=' is the property name and everything after '=' is the value.
809 * Lines that start with '#' are treated as comments and ignored.
810 * No special processing of whitespace or any escape characters is performed.
811 * The last definition of a property "wins" (i.e., it overrides all earlier
812 * definitions of the property).
813 */
814 class JVMCIPropertiesFileClosure : public ParseClosure {
815 SystemProperty** _plist;
816 public:
817 JVMCIPropertiesFileClosure(SystemProperty** plist) : _plist(plist) {}
818 void do_line(char* line) {
819 if (line[0] == '#') {
820 // skip comment
821 return;
822 }
823 size_t len = strlen(line);
824 char* sep = strchr(line, '=');
825 if (sep == NULL) {
826 warn_and_abort("invalid format: could not find '=' character");
827 return;
828 }
829 if (sep == line) {
830 warn_and_abort("invalid format: name cannot be empty");
831 return;
832 }
833 *sep = '\0';
834 const char* name = line;
835 char* value = sep + 1;
836 Arguments::PropertyList_unique_add(_plist, name, value);
837 }
838 };
839
840 void JVMCIRuntime::init_system_properties(SystemProperty** plist) {
841 char jvmciDir[JVM_MAXPATHLEN];
842 const char* fileSep = os::file_separator();
843 jio_snprintf(jvmciDir, sizeof(jvmciDir), "%s%slib%sjvmci",
844 Arguments::get_java_home(), fileSep, fileSep, fileSep);
845 DIR* dir = os::opendir(jvmciDir);
846 if (dir != NULL) {
847 struct dirent *entry;
848 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(jvmciDir), mtInternal);
849 JVMCIPropertiesFileClosure closure(plist);
850 const unsigned suffix_len = (unsigned)strlen(".properties");
851 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL && !closure.is_aborted()) {
852 const char* name = entry->d_name;
853 if (strlen(name) > suffix_len && strcmp(name + strlen(name) - suffix_len, ".properties") == 0) {
854 char propertiesFilePath[JVM_MAXPATHLEN];
855 jio_snprintf(propertiesFilePath, sizeof(propertiesFilePath), "%s%s%s",jvmciDir, fileSep, name);
856 JVMCIRuntime::parse_lines(propertiesFilePath, &closure, false);
857 }
858 }
859 FREE_C_HEAP_ARRAY(char, dbuf);
860 os::closedir(dir);
861 }
862 }
863
864 #define CHECK_WARN_ABORT_(message) THREAD); \
865 if (HAS_PENDING_EXCEPTION) { \
866 warning(message); \
867 char buf[512]; \
868 jio_snprintf(buf, 512, "Uncaught exception at %s:%d", __FILE__, __LINE__); \
869 JVMCIRuntime::abort_on_pending_exception(PENDING_EXCEPTION, buf); \
870 return; \
871 } \
872 (void)(0
873
874 void JVMCIRuntime::save_compiler(const char* compiler) {
875 assert(compiler != NULL, "npe");
876 assert(_compiler == NULL, "cannot reassign JVMCI compiler");
877 _compiler = compiler;
878 }
879
880 jint JVMCIRuntime::save_options(SystemProperty* props) {
881 int count = 0;
882 SystemProperty* first = NULL;
883 for (SystemProperty* p = props; p != NULL; p = p->next()) {
884 if (strncmp(p->key(), OPTION_PREFIX, OPTION_PREFIX_LEN) == 0) {
885 if (p->value() == NULL || strlen(p->value()) == 0) {
886 jio_fprintf(defaultStream::output_stream(), "JVMCI option %s must have non-zero length value\n", p->key());
887 return JNI_ERR;
888 }
889 if (first == NULL) {
890 first = p;
891 }
892 count++;
893 }
894 }
895 if (count != 0) {
896 _options_count = count;
897 _options = NEW_C_HEAP_ARRAY(SystemProperty*, count, mtCompiler);
898 _options[0] = first;
899 SystemProperty** insert_pos = _options + 1;
900 for (SystemProperty* p = first->next(); p != NULL; p = p->next()) {
901 if (strncmp(p->key(), OPTION_PREFIX, OPTION_PREFIX_LEN) == 0) {
902 *insert_pos = p;
903 insert_pos++;
904 }
905 }
906 assert (insert_pos - _options == count, "must be");
907 }
908 return JNI_OK;
909 }
910
911 void JVMCIRuntime::shutdown() {
912 if (_HotSpotJVMCIRuntime_instance != NULL) {
913 _shutdown_called = true;
914 JavaThread* THREAD = JavaThread::current();
915 HandleMark hm(THREAD);
916 Handle receiver = get_HotSpotJVMCIRuntime(CHECK_ABORT);
917 JavaValue result(T_VOID);
918 JavaCallArguments args;
919 args.push_oop(receiver);
920 JavaCalls::call_special(&result, receiver->klass(), vmSymbols::shutdown_method_name(), vmSymbols::void_method_signature(), &args, CHECK_ABORT);
921 }
922 }
923
924 void JVMCIRuntime::call_printStackTrace(Handle exception, Thread* thread) {
925 assert(exception->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
926 JavaValue result(T_VOID);
927 JavaCalls::call_virtual(&result,
928 exception,
929 KlassHandle(thread,
930 SystemDictionary::Throwable_klass()),
931 vmSymbols::printStackTrace_name(),
932 vmSymbols::void_method_signature(),
933 thread);
934 }
935
936 void JVMCIRuntime::abort_on_pending_exception(Handle exception, const char* message, bool dump_core) {
937 Thread* THREAD = Thread::current();
938 CLEAR_PENDING_EXCEPTION;
939 tty->print_raw_cr(message);
940 call_printStackTrace(exception, THREAD);
941
942 // Give other aborting threads to also print their stack traces.
943 // This can be very useful when debugging class initialization
944 // failures.
945 os::sleep(THREAD, 200, false);
946
947 vm_abort(dump_core);
948 }
949
950 void JVMCIRuntime::parse_lines(char* path, ParseClosure* closure, bool warnStatFailure) {
951 struct stat st;
952 if (os::stat(path, &st) == 0 && (st.st_mode & S_IFREG) == S_IFREG) { // exists & is regular file
953 int file_handle = os::open(path, 0, 0);
954 if (file_handle != -1) {
955 char* buffer = NEW_C_HEAP_ARRAY(char, st.st_size + 1, mtInternal);
956 int num_read;
957 num_read = (int) os::read(file_handle, (char*) buffer, st.st_size);
958 if (num_read == -1) {
959 warning("Error reading file %s due to %s", path, strerror(errno));
960 } else if (num_read != st.st_size) {
961 warning("Only read %d of " SIZE_FORMAT " bytes from %s", num_read, (size_t) st.st_size, path);
962 }
963 os::close(file_handle);
964 closure->set_filename(path);
965 if (num_read == st.st_size) {
966 buffer[num_read] = '\0';
967
968 char* line = buffer;
969 while (line - buffer < num_read && !closure->is_aborted()) {
970 // find line end (\r, \n or \r\n)
971 char* nextline = NULL;
972 char* cr = strchr(line, '\r');
973 char* lf = strchr(line, '\n');
974 if (cr != NULL && lf != NULL) {
975 char* min = MIN2(cr, lf);
976 *min = '\0';
977 if (lf == cr + 1) {
978 nextline = lf + 1;
979 } else {
980 nextline = min + 1;
981 }
982 } else if (cr != NULL) {
983 *cr = '\0';
984 nextline = cr + 1;
985 } else if (lf != NULL) {
986 *lf = '\0';
987 nextline = lf + 1;
988 }
989 // trim left
990 while (*line == ' ' || *line == '\t') line++;
991 char* end = line + strlen(line);
992 // trim right
993 while (end > line && (*(end -1) == ' ' || *(end -1) == '\t')) end--;
994 *end = '\0';
995 // skip comments and empty lines
996 if (*line != '#' && strlen(line) > 0) {
997 closure->parse_line(line);
998 }
999 if (nextline != NULL) {
1000 line = nextline;
1001 } else {
1002 // File without newline at the end
1003 break;
1004 }
1005 }
1006 }
1007 FREE_C_HEAP_ARRAY(char, buffer);
1008 } else {
1009 warning("Error opening file %s due to %s", path, strerror(errno));
1010 }
1011 } else if (warnStatFailure) {
1012 warning("Could not stat file %s due to %s", path, strerror(errno));
1013 }
1014 }