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 "logging/log.hpp"
35 #include "memory/oopFactory.hpp"
36 #include "oops/oop.inline.hpp"
37 #include "oops/objArrayOop.inline.hpp"
38 #include "prims/jvm.h"
39 #include "runtime/biasedLocking.hpp"
40 #include "runtime/interfaceSupport.hpp"
41 #include "runtime/reflection.hpp"
42 #include "runtime/sharedRuntime.hpp"
43 #include "utilities/debug.hpp"
44 #include "utilities/defaultStream.hpp"
45
46 #if defined(_MSC_VER)
47 #define strtoll _strtoi64
48 #endif
49
50 jobject JVMCIRuntime::_HotSpotJVMCIRuntime_instance = NULL;
51 bool JVMCIRuntime::_HotSpotJVMCIRuntime_initialized = false;
52 bool JVMCIRuntime::_well_known_classes_initialized = false;
53 const char* JVMCIRuntime::_compiler = NULL;
54 int JVMCIRuntime::_options_count = 0;
55 SystemProperty** JVMCIRuntime::_options = NULL;
56 int JVMCIRuntime::_trivial_prefixes_count = 0;
57 char** JVMCIRuntime::_trivial_prefixes = NULL;
58 bool JVMCIRuntime::_shutdown_called = false;
59
60 static const char* OPTION_PREFIX = "jvmci.option.";
61 static const size_t OPTION_PREFIX_LEN = strlen(OPTION_PREFIX);
62
63 BasicType JVMCIRuntime::kindToBasicType(Handle kind, TRAPS) {
64 if (kind.is_null()) {
65 THROW_(vmSymbols::java_lang_NullPointerException(), T_ILLEGAL);
66 }
67 jchar ch = JavaKind::typeChar(kind);
68 switch(ch) {
69 case 'z': return T_BOOLEAN;
70 case 'b': return T_BYTE;
71 case 's': return T_SHORT;
72 case 'c': return T_CHAR;
73 case 'i': return T_INT;
74 case 'f': return T_FLOAT;
75 case 'j': return T_LONG;
76 case 'd': return T_DOUBLE;
77 case 'a': return T_OBJECT;
78 case '-': return T_ILLEGAL;
79 default:
80 JVMCI_ERROR_(T_ILLEGAL, "unexpected Kind: %c", ch);
81 }
82 }
83
84 // Simple helper to see if the caller of a runtime stub which
85 // entered the VM has been deoptimized
86
87 static bool caller_is_deopted() {
88 JavaThread* thread = JavaThread::current();
89 RegisterMap reg_map(thread, false);
90 frame runtime_frame = thread->last_frame();
91 frame caller_frame = runtime_frame.sender(®_map);
92 assert(caller_frame.is_compiled_frame(), "must be compiled");
93 return caller_frame.is_deoptimized_frame();
94 }
95
96 // Stress deoptimization
97 static void deopt_caller() {
98 if ( !caller_is_deopted()) {
99 JavaThread* thread = JavaThread::current();
100 RegisterMap reg_map(thread, false);
101 frame runtime_frame = thread->last_frame();
102 frame caller_frame = runtime_frame.sender(®_map);
103 Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
104 assert(caller_is_deopted(), "Must be deoptimized");
105 }
106 }
107
108 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_instance(JavaThread* thread, Klass* klass))
109 JRT_BLOCK;
110 assert(klass->is_klass(), "not a class");
111 instanceKlassHandle h(thread, klass);
112 h->check_valid_for_instantiation(true, CHECK);
113 // make sure klass is initialized
114 h->initialize(CHECK);
115 // allocate instance and return via TLS
116 oop obj = h->allocate_instance(CHECK);
117 thread->set_vm_result(obj);
118 JRT_BLOCK_END;
119
120 if (ReduceInitialCardMarks) {
121 new_store_pre_barrier(thread);
122 }
123 JRT_END
124
125 JRT_BLOCK_ENTRY(void, JVMCIRuntime::new_array(JavaThread* thread, Klass* array_klass, jint length))
126 JRT_BLOCK;
127 // Note: no handle for klass needed since they are not used
128 // anymore after new_objArray() and no GC can happen before.
129 // (This may have to change if this code changes!)
130 assert(array_klass->is_klass(), "not a class");
131 oop obj;
132 if (array_klass->is_typeArray_klass()) {
133 BasicType elt_type = TypeArrayKlass::cast(array_klass)->element_type();
134 obj = oopFactory::new_typeArray(elt_type, length, CHECK);
135 } else {
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 }
157 JRT_END
158
159 void 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
176 JRT_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 oop obj = ArrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK);
180 thread->set_vm_result(obj);
181 JRT_END
182
183 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_array(JavaThread* thread, oopDesc* element_mirror, jint length))
184 oop obj = Reflection::reflect_new_array(element_mirror, length, CHECK);
185 thread->set_vm_result(obj);
186 JRT_END
187
188 JRT_ENTRY(void, JVMCIRuntime::dynamic_new_instance(JavaThread* thread, oopDesc* type_mirror))
189 instanceKlassHandle klass(THREAD, java_lang_Class::as_Klass(type_mirror));
190
191 if (klass == NULL) {
192 ResourceMark rm(THREAD);
193 THROW(vmSymbols::java_lang_InstantiationException());
194 }
195
196 // Create new instance (the receiver)
197 klass->check_valid_for_instantiation(false, CHECK);
198
199 // Make sure klass gets initialized
200 klass->initialize(CHECK);
201
202 oop obj = klass->allocate_instance(CHECK);
203 thread->set_vm_result(obj);
204 JRT_END
205
206 extern void vm_exit(int code);
207
208 // Enter this method from compiled code handler below. This is where we transition
209 // to VM mode. This is done as a helper routine so that the method called directly
210 // from compiled code does not have to transition to VM. This allows the entry
211 // method to see if the nmethod that we have just looked up a handler for has
212 // been deoptimized while we were in the vm. This simplifies the assembly code
213 // cpu directories.
214 //
215 // We are entering here from exception stub (via the entry method below)
216 // If there is a compiled exception handler in this method, we will continue there;
217 // otherwise we will unwind the stack and continue at the caller of top frame method
218 // Note: we enter in Java using a special JRT wrapper. This wrapper allows us to
219 // control the area where we can allow a safepoint. After we exit the safepoint area we can
220 // check to see if the handler we are going to return is now in a nmethod that has
221 // been deoptimized. If that is the case we return the deopt blob
222 // unpack_with_exception entry instead. This makes life for the exception blob easier
223 // because making that same check and diverting is painful from assembly language.
224 JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* thread, oopDesc* ex, address pc, nmethod*& nm))
225 // Reset method handle flag.
226 thread->set_is_method_handle_return(false);
227
228 Handle exception(thread, ex);
229 nm = CodeCache::find_nmethod(pc);
230 assert(nm != NULL, "this is not a compiled method");
231 // Adjust the pc as needed/
232 if (nm->is_deopt_pc(pc)) {
233 RegisterMap map(thread, false);
234 frame exception_frame = thread->last_frame().sender(&map);
235 // if the frame isn't deopted then pc must not correspond to the caller of last_frame
236 assert(exception_frame.is_deoptimized_frame(), "must be deopted");
237 pc = exception_frame.pc();
238 }
239 #ifdef ASSERT
240 assert(exception.not_null(), "NULL exceptions should be handled by throw_exception");
241 assert(exception->is_oop(), "just checking");
242 // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
243 if (!(exception->is_a(SystemDictionary::Throwable_klass()))) {
244 if (ExitVMOnVerifyError) vm_exit(-1);
245 ShouldNotReachHere();
246 }
247 #endif
248
249 // Check the stack guard pages and reenable them if necessary and there is
250 // enough space on the stack to do so. Use fast exceptions only if the guard
251 // pages are enabled.
252 bool guard_pages_enabled = thread->stack_guards_enabled();
253 if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack();
254
255 if (JvmtiExport::can_post_on_exceptions()) {
256 // To ensure correct notification of exception catches and throws
257 // we have to deoptimize here. If we attempted to notify the
258 // catches and throws during this exception lookup it's possible
259 // we could deoptimize on the way out of the VM and end back in
260 // the interpreter at the throw site. This would result in double
261 // notifications since the interpreter would also notify about
262 // these same catches and throws as it unwound the frame.
263
264 RegisterMap reg_map(thread);
265 frame stub_frame = thread->last_frame();
266 frame caller_frame = stub_frame.sender(®_map);
267
268 // We don't really want to deoptimize the nmethod itself since we
269 // can actually continue in the exception handler ourselves but I
270 // don't see an easy way to have the desired effect.
271 Deoptimization::deoptimize_frame(thread, caller_frame.id(), Deoptimization::Reason_constraint);
272 assert(caller_is_deopted(), "Must be deoptimized");
273
274 return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
275 }
276
277 // ExceptionCache is used only for exceptions at call sites and not for implicit exceptions
278 if (guard_pages_enabled) {
279 address fast_continuation = nm->handler_for_exception_and_pc(exception, pc);
280 if (fast_continuation != NULL) {
281 // Set flag if return address is a method handle call site.
282 thread->set_is_method_handle_return(nm->is_method_handle_return(pc));
283 return fast_continuation;
284 }
285 }
286
287 // If the stack guard pages are enabled, check whether there is a handler in
288 // the current method. Otherwise (guard pages disabled), force an unwind and
289 // skip the exception cache update (i.e., just leave continuation==NULL).
290 address continuation = NULL;
291 if (guard_pages_enabled) {
292
293 // New exception handling mechanism can support inlined methods
294 // with exception handlers since the mappings are from PC to PC
295
296 // debugging support
297 // tracing
298 if (log_is_enabled(Info, exceptions)) {
299 ResourceMark rm;
300 log_info(exceptions)("Exception <%s> (" INTPTR_FORMAT ") thrown in"
301 " compiled method <%s> at PC " INTPTR_FORMAT
302 " for thread " INTPTR_FORMAT,
303 exception->print_value_string(),
304 p2i((address)exception()),
305 nm->method()->print_value_string(), p2i(pc),
306 p2i(thread));
307 }
308 // for AbortVMOnException flag
309 NOT_PRODUCT(Exceptions::debug_check_abort(exception));
310
311 // Clear out the exception oop and pc since looking up an
312 // exception handler can cause class loading, which might throw an
313 // exception and those fields are expected to be clear during
314 // normal bytecode execution.
315 thread->clear_exception_oop_and_pc();
316
317 continuation = SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, false, false);
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 if (continuation != NULL && !SharedRuntime::deopt_blob()->contains(continuation)) {
324 nm->add_handler_for_exception_and_pc(exception, pc, continuation);
325 }
326 }
327
328 // Set flag if return address is a method handle call site.
329 thread->set_is_method_handle_return(nm->is_method_handle_return(pc));
330
331 if (log_is_enabled(Info, exceptions)) {
332 ResourceMark rm;
333 log_info(exceptions)("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT
334 " for exception thrown at PC " PTR_FORMAT,
335 p2i(thread), p2i(continuation), p2i(pc));
336 }
337
338 return continuation;
339 JRT_END
340
341 // Enter this method from compiled code only if there is a Java exception handler
342 // in the method handling the exception.
343 // We are entering here from exception stub. We don't do a normal VM transition here.
344 // We do it in a helper. This is so we can check to see if the nmethod we have just
345 // searched for an exception handler has been deoptimized in the meantime.
346 address JVMCIRuntime::exception_handler_for_pc(JavaThread* thread) {
347 oop exception = thread->exception_oop();
348 address pc = thread->exception_pc();
349 // Still in Java mode
350 DEBUG_ONLY(ResetNoHandleMark rnhm);
351 nmethod* nm = NULL;
352 address continuation = NULL;
353 {
354 // Enter VM mode by calling the helper
355 ResetNoHandleMark rnhm;
356 continuation = exception_handler_for_pc_helper(thread, exception, pc, nm);
357 }
358 // Back in JAVA, use no oops DON'T safepoint
359
360 // Now check to see if the compiled method we were called from is now deoptimized.
361 // If so we must return to the deopt blob and deoptimize the nmethod
362 if (nm != NULL && caller_is_deopted()) {
363 continuation = SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
364 }
365
366 assert(continuation != NULL, "no handler found");
367 return continuation;
368 }
369
370 JRT_ENTRY(void, JVMCIRuntime::create_null_exception(JavaThread* thread))
371 SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException());
372 thread->set_vm_result(PENDING_EXCEPTION);
373 CLEAR_PENDING_EXCEPTION;
374 JRT_END
375
376 JRT_ENTRY(void, JVMCIRuntime::create_out_of_bounds_exception(JavaThread* thread, jint index))
377 char message[jintAsStringSize];
378 sprintf(message, "%d", index);
379 SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), message);
380 thread->set_vm_result(PENDING_EXCEPTION);
381 CLEAR_PENDING_EXCEPTION;
382 JRT_END
383
384 JRT_ENTRY_NO_ASYNC(void, JVMCIRuntime::monitorenter(JavaThread* thread, oopDesc* obj, BasicLock* lock))
385 IF_TRACE_jvmci_3 {
386 char type[O_BUFLEN];
387 obj->klass()->name()->as_C_string(type, O_BUFLEN);
388 markOop mark = obj->mark();
389 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));
390 tty->flush();
391 }
392 #ifdef ASSERT
393 if (PrintBiasedLockingStatistics) {
394 Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
395 }
396 #endif
397 Handle h_obj(thread, obj);
398 assert(h_obj()->is_oop(), "must be NULL or an object");
399 if (UseBiasedLocking) {
400 // Retry fast entry if bias is revoked to avoid unnecessary inflation
401 ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK);
402 } else {
403 if (JVMCIUseFastLocking) {
404 // When using fast locking, the compiled code has already tried the fast case
405 ObjectSynchronizer::slow_enter(h_obj, lock, THREAD);
406 } else {
407 ObjectSynchronizer::fast_enter(h_obj, lock, false, THREAD);
408 }
409 }
410 TRACE_jvmci_3("%s: exiting locking slow with obj=" INTPTR_FORMAT, thread->name(), p2i(obj));
411 JRT_END
412
413 JRT_LEAF(void, JVMCIRuntime::monitorexit(JavaThread* thread, oopDesc* obj, BasicLock* lock))
414 assert(thread == JavaThread::current(), "threads must correspond");
415 assert(thread->last_Java_sp(), "last_Java_sp must be set");
416 // monitorexit is non-blocking (leaf routine) => no exceptions can be thrown
417 EXCEPTION_MARK;
418
419 #ifdef DEBUG
420 if (!obj->is_oop()) {
421 ResetNoHandleMark rhm;
422 nmethod* method = thread->last_frame().cb()->as_nmethod_or_null();
423 if (method != NULL) {
424 tty->print_cr("ERROR in monitorexit in method %s wrong obj " INTPTR_FORMAT, method->name(), p2i(obj));
425 }
426 thread->print_stack_on(tty);
427 assert(false, "invalid lock object pointer dected");
428 }
429 #endif
430
431 if (JVMCIUseFastLocking) {
432 // When using fast locking, the compiled code has already tried the fast case
433 ObjectSynchronizer::slow_exit(obj, lock, THREAD);
434 } else {
435 ObjectSynchronizer::fast_exit(obj, lock, THREAD);
436 }
437 IF_TRACE_jvmci_3 {
438 char type[O_BUFLEN];
439 obj->klass()->name()->as_C_string(type, O_BUFLEN);
440 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));
441 tty->flush();
442 }
443 JRT_END
444
445 JRT_LEAF(void, JVMCIRuntime::log_object(JavaThread* thread, oopDesc* obj, bool as_string, bool newline))
446 ttyLocker ttyl;
447
448 if (obj == NULL) {
449 tty->print("NULL");
450 } else if (obj->is_oop_or_null(true) && (!as_string || !java_lang_String::is_instance(obj))) {
451 if (obj->is_oop_or_null(true)) {
452 char buf[O_BUFLEN];
453 tty->print("%s@" INTPTR_FORMAT, obj->klass()->name()->as_C_string(buf, O_BUFLEN), p2i(obj));
454 } else {
455 tty->print(INTPTR_FORMAT, p2i(obj));
456 }
457 } else {
458 ResourceMark rm;
459 assert(obj != NULL && java_lang_String::is_instance(obj), "must be");
460 char *buf = java_lang_String::as_utf8_string(obj);
461 tty->print_raw(buf);
462 }
463 if (newline) {
464 tty->cr();
465 }
466 JRT_END
467
468 JRT_LEAF(void, JVMCIRuntime::write_barrier_pre(JavaThread* thread, oopDesc* obj))
469 thread->satb_mark_queue().enqueue(obj);
470 JRT_END
471
472 JRT_LEAF(void, JVMCIRuntime::write_barrier_post(JavaThread* thread, void* card_addr))
473 thread->dirty_card_queue().enqueue(card_addr);
474 JRT_END
475
476 JRT_LEAF(jboolean, JVMCIRuntime::validate_object(JavaThread* thread, oopDesc* parent, oopDesc* child))
477 bool ret = true;
478 if(!Universe::heap()->is_in_closed_subset(parent)) {
479 tty->print_cr("Parent Object " INTPTR_FORMAT " not in heap", p2i(parent));
480 parent->print();
481 ret=false;
482 }
483 if(!Universe::heap()->is_in_closed_subset(child)) {
484 tty->print_cr("Child Object " INTPTR_FORMAT " not in heap", p2i(child));
485 child->print();
486 ret=false;
487 }
488 return (jint)ret;
489 JRT_END
490
491 JRT_ENTRY(void, JVMCIRuntime::vm_error(JavaThread* thread, jlong where, jlong format, jlong value))
492 ResourceMark rm;
493 const char *error_msg = where == 0L ? "<internal JVMCI error>" : (char*) (address) where;
494 char *detail_msg = NULL;
495 if (format != 0L) {
496 const char* buf = (char*) (address) format;
497 size_t detail_msg_length = strlen(buf) * 2;
498 detail_msg = (char *) NEW_RESOURCE_ARRAY(u_char, detail_msg_length);
499 jio_snprintf(detail_msg, detail_msg_length, buf, value);
500 report_vm_error(__FILE__, __LINE__, error_msg, "%s", detail_msg);
501 } else {
502 report_vm_error(__FILE__, __LINE__, error_msg);
503 }
504 JRT_END
505
506 JRT_LEAF(oopDesc*, JVMCIRuntime::load_and_clear_exception(JavaThread* thread))
507 oop exception = thread->exception_oop();
508 assert(exception != NULL, "npe");
509 thread->set_exception_oop(NULL);
510 thread->set_exception_pc(0);
511 return exception;
512 JRT_END
513
514 PRAGMA_DIAG_PUSH
515 PRAGMA_FORMAT_NONLITERAL_IGNORED
516 JRT_LEAF(void, JVMCIRuntime::log_printf(JavaThread* thread, oopDesc* format, jlong v1, jlong v2, jlong v3))
517 ResourceMark rm;
518 assert(format != NULL && java_lang_String::is_instance(format), "must be");
519 char *buf = java_lang_String::as_utf8_string(format);
520 tty->print((const char*)buf, v1, v2, v3);
521 JRT_END
522 PRAGMA_DIAG_POP
523
524 static void decipher(jlong v, bool ignoreZero) {
525 if (v != 0 || !ignoreZero) {
526 void* p = (void *)(address) v;
527 CodeBlob* cb = CodeCache::find_blob(p);
528 if (cb) {
529 if (cb->is_nmethod()) {
530 char buf[O_BUFLEN];
531 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()));
532 return;
533 }
534 cb->print_value_on(tty);
535 return;
536 }
537 if (Universe::heap()->is_in(p)) {
538 oop obj = oop(p);
539 obj->print_value_on(tty);
540 return;
541 }
542 tty->print(INTPTR_FORMAT " [long: " JLONG_FORMAT ", double %lf, char %c]",p2i((void *)v), (jlong)v, (jdouble)v, (char)v);
543 }
544 }
545
546 PRAGMA_DIAG_PUSH
547 PRAGMA_FORMAT_NONLITERAL_IGNORED
548 JRT_LEAF(void, JVMCIRuntime::vm_message(jboolean vmError, jlong format, jlong v1, jlong v2, jlong v3))
549 ResourceMark rm;
550 const char *buf = (const char*) (address) format;
551 if (vmError) {
552 if (buf != NULL) {
553 fatal(buf, v1, v2, v3);
554 } else {
555 fatal("<anonymous error>");
556 }
557 } else if (buf != NULL) {
558 tty->print(buf, v1, v2, v3);
559 } else {
560 assert(v2 == 0, "v2 != 0");
561 assert(v3 == 0, "v3 != 0");
562 decipher(v1, false);
563 }
564 JRT_END
565 PRAGMA_DIAG_POP
566
567 JRT_LEAF(void, JVMCIRuntime::log_primitive(JavaThread* thread, jchar typeChar, jlong value, jboolean newline))
568 union {
569 jlong l;
570 jdouble d;
571 jfloat f;
572 } uu;
573 uu.l = value;
574 switch (typeChar) {
575 case 'z': tty->print(value == 0 ? "false" : "true"); break;
576 case 'b': tty->print("%d", (jbyte) value); break;
577 case 'c': tty->print("%c", (jchar) value); break;
578 case 's': tty->print("%d", (jshort) value); break;
579 case 'i': tty->print("%d", (jint) value); break;
580 case 'f': tty->print("%f", uu.f); break;
581 case 'j': tty->print(JLONG_FORMAT, value); break;
582 case 'd': tty->print("%lf", uu.d); break;
583 default: assert(false, "unknown typeChar"); break;
584 }
585 if (newline) {
586 tty->cr();
587 }
588 JRT_END
589
590 JRT_ENTRY(jint, JVMCIRuntime::identity_hash_code(JavaThread* thread, oopDesc* obj))
591 return (jint) obj->identity_hash();
592 JRT_END
593
594 JRT_ENTRY(jboolean, JVMCIRuntime::thread_is_interrupted(JavaThread* thread, oopDesc* receiver, jboolean clear_interrupted))
595 // Ensure that the C++ Thread and OSThread structures aren't freed before we operate.
596 // This locking requires thread_in_vm which is why this method cannot be JRT_LEAF.
597 Handle receiverHandle(thread, receiver);
598 MutexLockerEx ml(thread->threadObj() == (void*)receiver ? NULL : Threads_lock);
599 JavaThread* receiverThread = java_lang_Thread::thread(receiverHandle());
600 if (receiverThread == NULL) {
601 // The other thread may exit during this process, which is ok so return false.
602 return JNI_FALSE;
603 } else {
604 return (jint) Thread::is_interrupted(receiverThread, clear_interrupted != 0);
605 }
606 JRT_END
607
608 JRT_ENTRY(jint, JVMCIRuntime::test_deoptimize_call_int(JavaThread* thread, int value))
609 deopt_caller();
610 return value;
611 JRT_END
612
613 // private static JVMCIRuntime JVMCI.initializeRuntime()
614 JVM_ENTRY(jobject, JVM_GetJVMCIRuntime(JNIEnv *env, jclass c))
615 if (!EnableJVMCI) {
616 THROW_MSG_NULL(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled")
617 }
618 JVMCIRuntime::initialize_HotSpotJVMCIRuntime(CHECK_NULL);
619 jobject ret = JVMCIRuntime::get_HotSpotJVMCIRuntime_jobject(CHECK_NULL);
620 return ret;
621 JVM_END
622
623 Handle JVMCIRuntime::callStatic(const char* className, const char* methodName, const char* signature, JavaCallArguments* args, TRAPS) {
624 guarantee(!_HotSpotJVMCIRuntime_initialized, "cannot reinitialize HotSpotJVMCIRuntime");
625
626 TempNewSymbol name = SymbolTable::new_symbol(className, CHECK_(Handle()));
627 KlassHandle klass = SystemDictionary::resolve_or_fail(name, true, CHECK_(Handle()));
628 TempNewSymbol runtime = SymbolTable::new_symbol(methodName, CHECK_(Handle()));
629 TempNewSymbol sig = SymbolTable::new_symbol(signature, CHECK_(Handle()));
630 JavaValue result(T_OBJECT);
631 if (args == NULL) {
632 JavaCalls::call_static(&result, klass, runtime, sig, CHECK_(Handle()));
633 } else {
634 JavaCalls::call_static(&result, klass, runtime, sig, args, CHECK_(Handle()));
635 }
636 return Handle((oop)result.get_jobject());
637 }
638
639 static bool jvmci_options_file_exists() {
640 const char* home = Arguments::get_java_home();
641 size_t path_len = strlen(home) + strlen("/lib/jvmci.options") + 1;
642 char path[JVM_MAXPATHLEN];
643 char sep = os::file_separator()[0];
644 jio_snprintf(path, JVM_MAXPATHLEN, "%s%clib%cjvmci.options", home, sep, sep);
645 struct stat st;
646 return os::stat(path, &st) == 0;
647 }
648
649 void JVMCIRuntime::initialize_HotSpotJVMCIRuntime(TRAPS) {
650 if (JNIHandles::resolve(_HotSpotJVMCIRuntime_instance) == NULL) {
651 #ifdef ASSERT
652 // This should only be called in the context of the JVMCI class being initialized
653 TempNewSymbol name = SymbolTable::new_symbol("jdk/vm/ci/runtime/JVMCI", CHECK);
654 Klass* k = SystemDictionary::resolve_or_null(name, CHECK);
655 instanceKlassHandle klass = InstanceKlass::cast(k);
656 assert(klass->is_being_initialized() && klass->is_reentrant_initialization(THREAD),
657 "HotSpotJVMCIRuntime initialization should only be triggered through JVMCI initialization");
658 #endif
659
660 bool parseOptionsFile = jvmci_options_file_exists();
661 if (_options != NULL || parseOptionsFile) {
662 JavaCallArguments args;
663 objArrayOop options;
664 if (_options != NULL) {
665 options = oopFactory::new_objArray(SystemDictionary::String_klass(), _options_count * 2, CHECK);
666 for (int i = 0; i < _options_count; i++) {
667 SystemProperty* prop = _options[i];
668 oop name = java_lang_String::create_oop_from_str(prop->key() + OPTION_PREFIX_LEN, CHECK);
669 const char* prop_value = prop->value() != NULL ? prop->value() : "";
670 oop value = java_lang_String::create_oop_from_str(prop_value, CHECK);
671 options->obj_at_put(i * 2, name);
672 options->obj_at_put((i * 2) + 1, value);
673 }
674 } else {
675 options = NULL;
676 }
677 args.push_oop(options);
678 args.push_int(parseOptionsFile);
679 callStatic("jdk/vm/ci/options/OptionsParser",
680 "parseOptionsFromVM",
681 "([Ljava/lang/String;Z)Ljava/lang/Boolean;", &args, CHECK);
682 }
683
684 if (_compiler != NULL) {
685 JavaCallArguments args;
686 oop compiler = java_lang_String::create_oop_from_str(_compiler, CHECK);
687 args.push_oop(compiler);
688 callStatic("jdk/vm/ci/hotspot/HotSpotJVMCICompilerConfig",
689 "selectCompiler",
690 "(Ljava/lang/String;)Ljava/lang/Boolean;", &args, CHECK);
691 }
692
693 Handle result = callStatic("jdk/vm/ci/hotspot/HotSpotJVMCIRuntime",
694 "runtime",
695 "()Ljdk/vm/ci/hotspot/HotSpotJVMCIRuntime;", NULL, CHECK);
696 objArrayOop trivial_prefixes = HotSpotJVMCIRuntime::trivialPrefixes(result);
697 if (trivial_prefixes != NULL) {
698 char** prefixes = NEW_C_HEAP_ARRAY(char*, trivial_prefixes->length(), mtCompiler);
699 for (int i = 0; i < trivial_prefixes->length(); i++) {
700 oop str = trivial_prefixes->obj_at(i);
701 if (str == NULL) {
702 THROW(vmSymbols::java_lang_NullPointerException());
703 } else {
704 prefixes[i] = strdup(java_lang_String::as_utf8_string(str));
705 }
706 }
707 _trivial_prefixes = prefixes;
708 _trivial_prefixes_count = trivial_prefixes->length();
709 }
710 _HotSpotJVMCIRuntime_initialized = true;
711 _HotSpotJVMCIRuntime_instance = JNIHandles::make_global(result());
712 }
713 }
714
715 void JVMCIRuntime::initialize_JVMCI(TRAPS) {
716 if (JNIHandles::resolve(_HotSpotJVMCIRuntime_instance) == NULL) {
717 callStatic("jdk/vm/ci/runtime/JVMCI",
718 "getRuntime",
719 "()Ljdk/vm/ci/runtime/JVMCIRuntime;", NULL, CHECK);
720 }
721 assert(_HotSpotJVMCIRuntime_initialized == true, "what?");
722 }
723
724 void JVMCIRuntime::initialize_well_known_classes(TRAPS) {
725 if (JVMCIRuntime::_well_known_classes_initialized == false) {
726 SystemDictionary::WKID scan = SystemDictionary::FIRST_JVMCI_WKID;
727 SystemDictionary::initialize_wk_klasses_through(SystemDictionary::LAST_JVMCI_WKID, scan, CHECK);
728 JVMCIJavaClasses::compute_offsets(CHECK);
729 JVMCIRuntime::_well_known_classes_initialized = true;
730 }
731 }
732
733 void JVMCIRuntime::metadata_do(void f(Metadata*)) {
734 // For simplicity, the existence of HotSpotJVMCIMetaAccessContext in
735 // the SystemDictionary well known classes should ensure the other
736 // classes have already been loaded, so make sure their order in the
737 // table enforces that.
738 assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedJavaMethodImpl) <
739 SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
740 assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotConstantPool) <
741 SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
742 assert(SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotResolvedObjectTypeImpl) <
743 SystemDictionary::WK_KLASS_ENUM_NAME(jdk_vm_ci_hotspot_HotSpotJVMCIMetaAccessContext), "must be loaded earlier");
744
745 if (HotSpotJVMCIMetaAccessContext::klass() == NULL ||
746 !HotSpotJVMCIMetaAccessContext::klass()->is_linked()) {
747 // Nothing could be registered yet
748 return;
749 }
750
751 // WeakReference<HotSpotJVMCIMetaAccessContext>[]
752 objArrayOop allContexts = HotSpotJVMCIMetaAccessContext::allContexts();
753 if (allContexts == NULL) {
754 return;
755 }
756
757 // These must be loaded at this point but the linking state doesn't matter.
758 assert(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass() != NULL, "must be loaded");
759 assert(SystemDictionary::HotSpotConstantPool_klass() != NULL, "must be loaded");
760 assert(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass() != NULL, "must be loaded");
761
762 for (int i = 0; i < allContexts->length(); i++) {
763 oop ref = allContexts->obj_at(i);
764 if (ref != NULL) {
765 oop referent = java_lang_ref_Reference::referent(ref);
766 if (referent != NULL) {
767 // Chunked Object[] with last element pointing to next chunk
768 objArrayOop metadataRoots = HotSpotJVMCIMetaAccessContext::metadataRoots(referent);
769 while (metadataRoots != NULL) {
770 for (int typeIndex = 0; typeIndex < metadataRoots->length() - 1; typeIndex++) {
771 oop reference = metadataRoots->obj_at(typeIndex);
772 if (reference == NULL) {
773 continue;
774 }
775 oop metadataRoot = java_lang_ref_Reference::referent(reference);
776 if (metadataRoot == NULL) {
777 continue;
778 }
779 if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedJavaMethodImpl_klass())) {
780 Method* method = CompilerToVM::asMethod(metadataRoot);
781 f(method);
782 } else if (metadataRoot->is_a(SystemDictionary::HotSpotConstantPool_klass())) {
783 ConstantPool* constantPool = CompilerToVM::asConstantPool(metadataRoot);
784 f(constantPool);
785 } else if (metadataRoot->is_a(SystemDictionary::HotSpotResolvedObjectTypeImpl_klass())) {
786 Klass* klass = CompilerToVM::asKlass(metadataRoot);
787 f(klass);
788 } else {
789 metadataRoot->print();
790 ShouldNotReachHere();
791 }
792 }
793 metadataRoots = (objArrayOop)metadataRoots->obj_at(metadataRoots->length() - 1);
794 assert(metadataRoots == NULL || metadataRoots->is_objArray(), "wrong type");
795 }
796 }
797 }
798 }
799 }
800
801 // private static void CompilerToVM.registerNatives()
802 JVM_ENTRY(void, JVM_RegisterJVMCINatives(JNIEnv *env, jclass c2vmClass))
803 if (!EnableJVMCI) {
804 THROW_MSG(vmSymbols::java_lang_InternalError(), "JVMCI is not enabled");
805 }
806
807 #ifdef _LP64
808 #ifndef TARGET_ARCH_sparc
809 uintptr_t heap_end = (uintptr_t) Universe::heap()->reserved_region().end();
810 uintptr_t allocation_end = heap_end + ((uintptr_t)16) * 1024 * 1024 * 1024;
811 guarantee(heap_end < allocation_end, "heap end too close to end of address space (might lead to erroneous TLAB allocations)");
812 #endif // TARGET_ARCH_sparc
813 #else
814 fatal("check TLAB allocation code for address space conflicts");
815 #endif
816
817 JVMCIRuntime::initialize_well_known_classes(CHECK);
818
819 {
820 ThreadToNativeFromVM trans(thread);
821
822 // Ensure _non_oop_bits is initialized
823 Universe::non_oop_word();
824
825 env->RegisterNatives(c2vmClass, CompilerToVM::methods, CompilerToVM::methods_count());
826 }
827 JVM_END
828
829 /**
830 * Closure for parsing a line from a *.properties file in jre/lib/jvmci/properties.
831 * The line must match the regular expression "[^=]+=.*". That is one or more
832 * characters other than '=' followed by '=' followed by zero or more characters.
833 * Everything before the '=' is the property name and everything after '=' is the value.
834 * Lines that start with '#' are treated as comments and ignored.
835 * No special processing of whitespace or any escape characters is performed.
836 * The last definition of a property "wins" (i.e., it overrides all earlier
837 * definitions of the property).
838 */
839 class JVMCIPropertiesFileClosure : public ParseClosure {
840 SystemProperty** _plist;
841 public:
842 JVMCIPropertiesFileClosure(SystemProperty** plist) : _plist(plist) {}
843 void do_line(char* line) {
844 if (line[0] == '#') {
845 // skip comment
846 return;
847 }
848 size_t len = strlen(line);
849 char* sep = strchr(line, '=');
850 if (sep == NULL) {
851 warn_and_abort("invalid format: could not find '=' character");
852 return;
853 }
854 if (sep == line) {
855 warn_and_abort("invalid format: name cannot be empty");
856 return;
857 }
858 *sep = '\0';
859 const char* name = line;
860 char* value = sep + 1;
861 Arguments::PropertyList_unique_add(_plist, name, value);
862 }
863 };
864
865 void JVMCIRuntime::init_system_properties(SystemProperty** plist) {
866 char jvmciDir[JVM_MAXPATHLEN];
867 const char* fileSep = os::file_separator();
868 jio_snprintf(jvmciDir, sizeof(jvmciDir), "%s%slib%sjvmci",
869 Arguments::get_java_home(), fileSep, fileSep, fileSep);
870 DIR* dir = os::opendir(jvmciDir);
871 if (dir != NULL) {
872 struct dirent *entry;
873 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(jvmciDir), mtInternal);
874 JVMCIPropertiesFileClosure closure(plist);
875 const unsigned suffix_len = (unsigned)strlen(".properties");
876 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL && !closure.is_aborted()) {
877 const char* name = entry->d_name;
878 if (strlen(name) > suffix_len && strcmp(name + strlen(name) - suffix_len, ".properties") == 0) {
879 char propertiesFilePath[JVM_MAXPATHLEN];
880 jio_snprintf(propertiesFilePath, sizeof(propertiesFilePath), "%s%s%s",jvmciDir, fileSep, name);
881 JVMCIRuntime::parse_lines(propertiesFilePath, &closure, false);
882 }
883 }
884 FREE_C_HEAP_ARRAY(char, dbuf);
885 os::closedir(dir);
886 }
887 }
888
889 #define CHECK_WARN_ABORT_(message) THREAD); \
890 if (HAS_PENDING_EXCEPTION) { \
891 warning(message); \
892 char buf[512]; \
893 jio_snprintf(buf, 512, "Uncaught exception at %s:%d", __FILE__, __LINE__); \
894 JVMCIRuntime::abort_on_pending_exception(PENDING_EXCEPTION, buf); \
895 return; \
896 } \
897 (void)(0
898
899 void JVMCIRuntime::save_compiler(const char* compiler) {
900 assert(compiler != NULL, "npe");
901 assert(_compiler == NULL, "cannot reassign JVMCI compiler");
902 _compiler = compiler;
903 }
904
905 void JVMCIRuntime::maybe_print_flags(TRAPS) {
906 if (_options != NULL) {
907 for (int i = 0; i < _options_count; i++) {
908 SystemProperty* p = _options[i];
909 const char* name = p->key() + OPTION_PREFIX_LEN;
910 if (strcmp(name, "PrintFlags") == 0 || strcmp(name, "ShowFlags") == 0) {
911 JVMCIRuntime::initialize_well_known_classes(CHECK);
912 HandleMark hm;
913 ResourceMark rm;
914 JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK);
915 return;
916 }
917 }
918 }
919 }
920
921 void JVMCIRuntime::save_options(SystemProperty* props) {
922 int count = 0;
923 SystemProperty* first = NULL;
924 for (SystemProperty* p = props; p != NULL; p = p->next()) {
925 if (strncmp(p->key(), OPTION_PREFIX, OPTION_PREFIX_LEN) == 0) {
926 if (first == NULL) {
927 first = p;
928 }
929 count++;
930 }
931 }
932 if (count != 0) {
933 _options_count = count;
934 _options = NEW_C_HEAP_ARRAY(SystemProperty*, count, mtCompiler);
935 _options[0] = first;
936 SystemProperty** insert_pos = _options + 1;
937 for (SystemProperty* p = first->next(); p != NULL; p = p->next()) {
938 if (strncmp(p->key(), OPTION_PREFIX, OPTION_PREFIX_LEN) == 0) {
939 *insert_pos = p;
940 insert_pos++;
941 }
942 }
943 assert (insert_pos - _options == count, "must be");
944 }
945 }
946
947 void JVMCIRuntime::shutdown() {
948 if (_HotSpotJVMCIRuntime_instance != NULL) {
949 _shutdown_called = true;
950 JavaThread* THREAD = JavaThread::current();
951 HandleMark hm(THREAD);
952 Handle receiver = get_HotSpotJVMCIRuntime(CHECK_ABORT);
953 JavaValue result(T_VOID);
954 JavaCallArguments args;
955 args.push_oop(receiver);
956 JavaCalls::call_special(&result, receiver->klass(), vmSymbols::shutdown_method_name(), vmSymbols::void_method_signature(), &args, CHECK_ABORT);
957 }
958 }
959
960 bool JVMCIRuntime::treat_as_trivial(Method* method) {
961 if (_HotSpotJVMCIRuntime_initialized) {
962 oop loader = method->method_holder()->class_loader();
963 if (loader == NULL) {
964 for (int i = 0; i < _trivial_prefixes_count; i++) {
965 if (method->method_holder()->name()->starts_with(_trivial_prefixes[i])) {
966 return true;
967 }
968 }
969 }
970 }
971 return false;
972 }
973
974 void JVMCIRuntime::call_printStackTrace(Handle exception, Thread* thread) {
975 assert(exception->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
976 JavaValue result(T_VOID);
977 JavaCalls::call_virtual(&result,
978 exception,
979 KlassHandle(thread,
980 SystemDictionary::Throwable_klass()),
981 vmSymbols::printStackTrace_name(),
982 vmSymbols::void_method_signature(),
983 thread);
984 }
985
986 void JVMCIRuntime::abort_on_pending_exception(Handle exception, const char* message, bool dump_core) {
987 Thread* THREAD = Thread::current();
988 CLEAR_PENDING_EXCEPTION;
989 tty->print_raw_cr(message);
990 call_printStackTrace(exception, THREAD);
991
992 // Give other aborting threads to also print their stack traces.
993 // This can be very useful when debugging class initialization
994 // failures.
995 os::sleep(THREAD, 200, false);
996
997 vm_abort(dump_core);
998 }
999
1000 void JVMCIRuntime::parse_lines(char* path, ParseClosure* closure, bool warnStatFailure) {
1001 struct stat st;
1002 if (::stat(path, &st) == 0 && (st.st_mode & S_IFREG) == S_IFREG) { // exists & is regular file
1003 int file_handle = ::open(path, os::default_file_open_flags(), 0);
1004 if (file_handle != -1) {
1005 char* buffer = NEW_C_HEAP_ARRAY(char, st.st_size + 1, mtInternal);
1006 int num_read;
1007 num_read = (int) ::read(file_handle, (char*) buffer, st.st_size);
1008 if (num_read == -1) {
1009 warning("Error reading file %s due to %s", path, strerror(errno));
1010 } else if (num_read != st.st_size) {
1011 warning("Only read %d of " SIZE_FORMAT " bytes from %s", num_read, (size_t) st.st_size, path);
1012 }
1013 ::close(file_handle);
1014 closure->set_filename(path);
1015 if (num_read == st.st_size) {
1016 buffer[num_read] = '\0';
1017
1018 char* line = buffer;
1019 while (line - buffer < num_read && !closure->is_aborted()) {
1020 // find line end (\r, \n or \r\n)
1021 char* nextline = NULL;
1022 char* cr = strchr(line, '\r');
1023 char* lf = strchr(line, '\n');
1024 if (cr != NULL && lf != NULL) {
1025 char* min = MIN2(cr, lf);
1026 *min = '\0';
1027 if (lf == cr + 1) {
1028 nextline = lf + 1;
1029 } else {
1030 nextline = min + 1;
1031 }
1032 } else if (cr != NULL) {
1033 *cr = '\0';
1034 nextline = cr + 1;
1035 } else if (lf != NULL) {
1036 *lf = '\0';
1037 nextline = lf + 1;
1038 }
1039 // trim left
1040 while (*line == ' ' || *line == '\t') line++;
1041 char* end = line + strlen(line);
1042 // trim right
1043 while (end > line && (*(end -1) == ' ' || *(end -1) == '\t')) end--;
1044 *end = '\0';
1045 // skip comments and empty lines
1046 if (*line != '#' && strlen(line) > 0) {
1047 closure->parse_line(line);
1048 }
1049 if (nextline != NULL) {
1050 line = nextline;
1051 } else {
1052 // File without newline at the end
1053 break;
1054 }
1055 }
1056 }
1057 FREE_C_HEAP_ARRAY(char, buffer);
1058 } else {
1059 warning("Error opening file %s due to %s", path, strerror(errno));
1060 }
1061 } else if (warnStatFailure) {
1062 warning("Could not stat file %s due to %s", path, strerror(errno));
1063 }
1064 }