1 /*
2 * Copyright (c) 1997, 2012, 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
25 #include "precompiled.hpp"
26 #include "code/codeCache.hpp"
27 #include "code/debugInfoRec.hpp"
28 #include "code/nmethod.hpp"
29 #include "code/pcDesc.hpp"
30 #include "code/scopeDesc.hpp"
31 #include "interpreter/interpreter.hpp"
32 #include "interpreter/oopMapCache.hpp"
33 #include "oops/instanceKlass.hpp"
34 #include "oops/oop.inline.hpp"
35 #include "runtime/basicLock.hpp"
36 #include "runtime/handles.inline.hpp"
37 #include "runtime/monitorChunk.hpp"
38 #include "runtime/signature.hpp"
39 #include "runtime/stubRoutines.hpp"
40 #include "runtime/vframeArray.hpp"
41 #include "runtime/vframe_hp.hpp"
42 #ifdef COMPILER2
43 #include "opto/matcher.hpp"
44 #endif
45
46
47 // ------------- compiledVFrame --------------
48
49 StackValueCollection* compiledVFrame::locals() const {
50 // Natives has no scope
51 if (scope() == NULL) return new StackValueCollection(0);
52 GrowableArray<ScopeValue*>* scv_list = scope()->locals();
53 if (scv_list == NULL) return new StackValueCollection(0);
54
55 // scv_list is the list of ScopeValues describing the JVM stack state.
56 // There is one scv_list entry for every JVM stack state in use.
57 int length = scv_list->length();
58 StackValueCollection* result = new StackValueCollection(length);
59 // In rare instances set_locals may have occurred in which case
60 // there are local values that are not described by the ScopeValue anymore
61 GrowableArray<jvmtiDeferredLocalVariable*>* deferred = NULL;
62 GrowableArray<jvmtiDeferredLocalVariableSet*>* list = thread()->deferred_locals();
63 if (list != NULL ) {
64 // In real life this never happens or is typically a single element search
65 for (int i = 0; i < list->length(); i++) {
66 if (list->at(i)->matches((vframe*)this)) {
67 deferred = list->at(i)->locals();
68 break;
69 }
70 }
71 }
72
73 for( int i = 0; i < length; i++ ) {
74 result->add( create_stack_value(scv_list->at(i)) );
75 }
76
77 // Replace specified locals with any deferred writes that are present
78 if (deferred != NULL) {
79 for ( int l = 0; l < deferred->length() ; l ++) {
80 jvmtiDeferredLocalVariable* val = deferred->at(l);
81 switch (val->type()) {
82 case T_BOOLEAN:
83 result->set_int_at(val->index(), val->value().z);
84 break;
85 case T_CHAR:
86 result->set_int_at(val->index(), val->value().c);
87 break;
88 case T_FLOAT:
89 result->set_float_at(val->index(), val->value().f);
90 break;
91 case T_DOUBLE:
92 result->set_double_at(val->index(), val->value().d);
93 break;
94 case T_BYTE:
95 result->set_int_at(val->index(), val->value().b);
96 break;
97 case T_SHORT:
98 result->set_int_at(val->index(), val->value().s);
99 break;
100 case T_INT:
101 result->set_int_at(val->index(), val->value().i);
102 break;
103 case T_LONG:
104 result->set_long_at(val->index(), val->value().j);
105 break;
106 case T_OBJECT:
107 {
108 Handle obj((oop)val->value().l);
109 result->set_obj_at(val->index(), obj);
110 }
111 break;
112 default:
113 ShouldNotReachHere();
114 }
115 }
116 }
117
118 return result;
119 }
120
121
122 void compiledVFrame::set_locals(StackValueCollection* values) const {
123
124 fatal("Should use update_local for each local update");
125 }
126
127 void compiledVFrame::update_local(BasicType type, int index, jvalue value) {
128
129 #ifdef ASSERT
130
131 assert(fr().is_deoptimized_frame(), "frame must be scheduled for deoptimization");
132 #endif /* ASSERT */
133 GrowableArray<jvmtiDeferredLocalVariableSet*>* deferred = thread()->deferred_locals();
134 if (deferred != NULL ) {
135 // See if this vframe has already had locals with deferred writes
136 int f;
137 for ( f = 0 ; f < deferred->length() ; f++ ) {
138 if (deferred->at(f)->matches(this)) {
139 // Matching, vframe now see if the local already had deferred write
140 GrowableArray<jvmtiDeferredLocalVariable*>* locals = deferred->at(f)->locals();
141 int l;
142 for (l = 0 ; l < locals->length() ; l++ ) {
143 if (locals->at(l)->index() == index) {
144 locals->at(l)->set_value(value);
145 return;
146 }
147 }
148 // No matching local already present. Push a new value onto the deferred collection
149 locals->push(new jvmtiDeferredLocalVariable(index, type, value));
150 return;
151 }
152 }
153 // No matching vframe must push a new vframe
154 } else {
155 // No deferred updates pending for this thread.
156 // allocate in C heap
157 deferred = new(ResourceObj::C_HEAP, mtCompiler) GrowableArray<jvmtiDeferredLocalVariableSet*> (1, true);
158 thread()->set_deferred_locals(deferred);
159 }
160 deferred->push(new jvmtiDeferredLocalVariableSet(method(), bci(), fr().id()));
161 assert(deferred->top()->id() == fr().id(), "Huh? Must match");
162 deferred->top()->set_local_at(index, type, value);
163 }
164
165 StackValueCollection* compiledVFrame::expressions() const {
166 // Natives has no scope
167 if (scope() == NULL) return new StackValueCollection(0);
168 GrowableArray<ScopeValue*>* scv_list = scope()->expressions();
169 if (scv_list == NULL) return new StackValueCollection(0);
170
171 // scv_list is the list of ScopeValues describing the JVM stack state.
172 // There is one scv_list entry for every JVM stack state in use.
173 int length = scv_list->length();
174 StackValueCollection* result = new StackValueCollection(length);
175 for( int i = 0; i < length; i++ )
176 result->add( create_stack_value(scv_list->at(i)) );
177
178 return result;
179 }
180
181
182 // The implementation of the following two methods was factorized into the
183 // class StackValue because it is also used from within deoptimization.cpp for
184 // rematerialization and relocking of non-escaping objects.
185
186 StackValue *compiledVFrame::create_stack_value(ScopeValue *sv) const {
187 return StackValue::create_stack_value(&_fr, register_map(), sv);
188 }
189
190 BasicLock* compiledVFrame::resolve_monitor_lock(Location location) const {
191 return StackValue::resolve_monitor_lock(&_fr, location);
192 }
193
194
195 GrowableArray<MonitorInfo*>* compiledVFrame::monitors() const {
196 // Natives has no scope
197 if (scope() == NULL) {
198 nmethod* nm = code();
199 Method* method = nm->method();
200 assert(method->is_native(), "");
201 if (!method->is_synchronized()) {
202 return new GrowableArray<MonitorInfo*>(0);
203 }
204 // This monitor is really only needed for UseBiasedLocking, but
205 // return it in all cases for now as it might be useful for stack
206 // traces and tools as well
207 GrowableArray<MonitorInfo*> *monitors = new GrowableArray<MonitorInfo*>(1);
208 // Casting away const
209 frame& fr = (frame&) _fr;
210 MonitorInfo* info = new MonitorInfo(
211 fr.get_native_receiver(), fr.get_native_monitor(), false, false);
212 monitors->push(info);
213 return monitors;
214 }
215 GrowableArray<MonitorValue*>* monitors = scope()->monitors();
216 if (monitors == NULL) {
217 return new GrowableArray<MonitorInfo*>(0);
218 }
219 GrowableArray<MonitorInfo*>* result = new GrowableArray<MonitorInfo*>(monitors->length());
220 for (int index = 0; index < monitors->length(); index++) {
221 MonitorValue* mv = monitors->at(index);
222 ScopeValue* ov = mv->owner();
223 StackValue *owner_sv = create_stack_value(ov); // it is an oop
224 if (ov->is_object() && owner_sv->obj_is_scalar_replaced()) { // The owner object was scalar replaced
225 assert(mv->eliminated(), "monitor should be eliminated for scalar replaced object");
226 // Put klass for scalar replaced object.
227 ScopeValue* kv = ((ObjectValue *)ov)->klass();
228 assert(kv->is_constant_oop(), "klass should be oop constant for scalar replaced object");
229 Handle k(((ConstantOopReadValue*)kv)->value()());
230 assert(java_lang_Class::is_instance(k()), "must be");
231 result->push(new MonitorInfo(k(), resolve_monitor_lock(mv->basic_lock()),
232 mv->eliminated(), true));
233 } else {
234 result->push(new MonitorInfo(owner_sv->get_obj()(), resolve_monitor_lock(mv->basic_lock()),
235 mv->eliminated(), false));
236 }
237 }
238 return result;
239 }
240
241
242 compiledVFrame::compiledVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread, nmethod* nm)
243 : javaVFrame(fr, reg_map, thread) {
244 _scope = NULL;
245 // Compiled method (native stub or Java code)
246 // native wrappers have no scope data, it is implied
247 if (!nm->is_native_method()) {
248 _scope = nm->scope_desc_at(_fr.pc());
249 }
250 }
251
252 compiledVFrame::compiledVFrame(const frame* fr, const RegisterMap* reg_map, JavaThread* thread, ScopeDesc* scope)
253 : javaVFrame(fr, reg_map, thread) {
254 _scope = scope;
255 guarantee(_scope != NULL, "scope must be present");
256 }
257
258
259 bool compiledVFrame::is_top() const {
260 // FIX IT: Remove this when new native stubs are in place
261 if (scope() == NULL) return true;
262 return scope()->is_top();
263 }
264
265
266 nmethod* compiledVFrame::code() const {
267 return CodeCache::find_nmethod(_fr.pc());
268 }
269
270
271 Method* compiledVFrame::method() const {
272 if (scope() == NULL) {
273 // native nmethods have no scope the method is implied
274 nmethod* nm = code();
275 assert(nm->is_native_method(), "must be native");
276 return nm->method();
277 }
278 return scope()->method();
279 }
280
281
282 int compiledVFrame::bci() const {
283 int raw = raw_bci();
284 return raw == SynchronizationEntryBCI ? 0 : raw;
285 }
286
287
288 int compiledVFrame::raw_bci() const {
289 if (scope() == NULL) {
290 // native nmethods have no scope the method/bci is implied
291 nmethod* nm = code();
292 assert(nm->is_native_method(), "must be native");
293 return 0;
294 }
295 return scope()->bci();
296 }
297
298 bool compiledVFrame::should_reexecute() const {
299 if (scope() == NULL) {
300 // native nmethods have no scope the method/bci is implied
301 nmethod* nm = code();
302 assert(nm->is_native_method(), "must be native");
303 return false;
304 }
305 return scope()->should_reexecute();
306 }
307
308 vframe* compiledVFrame::sender() const {
309 const frame f = fr();
310 if (scope() == NULL) {
311 // native nmethods have no scope the method/bci is implied
312 nmethod* nm = code();
313 assert(nm->is_native_method(), "must be native");
314 return vframe::sender();
315 } else {
316 return scope()->is_top()
317 ? vframe::sender()
318 : new compiledVFrame(&f, register_map(), thread(), scope()->sender());
319 }
320 }
321
322 jvmtiDeferredLocalVariableSet::jvmtiDeferredLocalVariableSet(Method* method, int bci, intptr_t* id) {
323 _method = method;
324 _bci = bci;
325 _id = id;
326 // Alway will need at least one, must be on C heap
327 _locals = new(ResourceObj::C_HEAP, mtCompiler) GrowableArray<jvmtiDeferredLocalVariable*> (1, true);
328 }
329
330 jvmtiDeferredLocalVariableSet::~jvmtiDeferredLocalVariableSet() {
331 for (int i = 0; i < _locals->length() ; i++ ) {
332 delete _locals->at(i);
333 }
334 // Free growableArray and c heap for elements
335 delete _locals;
336 }
337
338 bool jvmtiDeferredLocalVariableSet::matches(vframe* vf) {
339 if (!vf->is_compiled_frame()) return false;
340 compiledVFrame* cvf = (compiledVFrame*)vf;
341 return cvf->fr().id() == id() && cvf->method() == method() && cvf->bci() == bci();
342 }
343
344 void jvmtiDeferredLocalVariableSet::set_local_at(int idx, BasicType type, jvalue val) {
345 int i;
346 for ( i = 0 ; i < locals()->length() ; i++ ) {
347 if ( locals()->at(i)->index() == idx) {
348 assert(locals()->at(i)->type() == type, "Wrong type");
349 locals()->at(i)->set_value(val);
350 return;
351 }
352 }
353 locals()->push(new jvmtiDeferredLocalVariable(idx, type, val));
354 }
355
356 void jvmtiDeferredLocalVariableSet::oops_do(OopClosure* f) {
357 // The Method* is on the stack so a live activation keeps it alive
358 // either by mirror in interpreter or code in compiled code.
359 for ( int i = 0; i < locals()->length(); i++ ) {
360 if ( locals()->at(i)->type() == T_OBJECT) {
361 f->do_oop(locals()->at(i)->oop_addr());
362 }
363 }
364 }
365
366 jvmtiDeferredLocalVariable::jvmtiDeferredLocalVariable(int index, BasicType type, jvalue value) {
367 _index = index;
368 _type = type;
369 _value = value;
370 }
371
372
373 #ifndef PRODUCT
374 void compiledVFrame::verify() const {
375 Unimplemented();
376 }
377 #endif // PRODUCT