0
|
1 /*
|
|
2 * Copyright 2003-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
|
|
20 * CA 95054 USA or visit www.sun.com if you need additional information or
|
|
21 * have any questions.
|
|
22 *
|
|
23 */
|
|
24
|
|
25 # include "incls/_precompiled.incl"
|
|
26 # include "incls/_jvmtiCodeBlobEvents.cpp.incl"
|
|
27
|
|
28 // Support class to collect a list of the non-nmethod CodeBlobs in
|
|
29 // the CodeCache.
|
|
30 //
|
|
31 // This class actually creates a list of JvmtiCodeBlobDesc - each JvmtiCodeBlobDesc
|
|
32 // describes a single CodeBlob in the CodeCache. Note that collection is
|
|
33 // done to a static list - this is because CodeCache::blobs_do is defined
|
|
34 // as void CodeCache::blobs_do(void f(CodeBlob* nm)) and hence requires
|
|
35 // a C or static method.
|
|
36 //
|
|
37 // Usage :-
|
|
38 //
|
|
39 // CodeBlobCollector collector;
|
|
40 //
|
|
41 // collector.collect();
|
|
42 // JvmtiCodeBlobDesc* blob = collector.first();
|
|
43 // while (blob != NULL) {
|
|
44 // :
|
|
45 // blob = collector.next();
|
|
46 // }
|
|
47 //
|
|
48
|
|
49 class CodeBlobCollector : StackObj {
|
|
50 private:
|
|
51 GrowableArray<JvmtiCodeBlobDesc*>* _code_blobs; // collected blobs
|
|
52 int _pos; // iterator position
|
|
53
|
|
54 // used during a collection
|
|
55 static GrowableArray<JvmtiCodeBlobDesc*>* _global_code_blobs;
|
|
56 static void do_blob(CodeBlob* cb);
|
|
57 public:
|
|
58 CodeBlobCollector() {
|
|
59 _code_blobs = NULL;
|
|
60 _pos = -1;
|
|
61 }
|
|
62 ~CodeBlobCollector() {
|
|
63 if (_code_blobs != NULL) {
|
|
64 for (int i=0; i<_code_blobs->length(); i++) {
|
|
65 FreeHeap(_code_blobs->at(i));
|
|
66 }
|
|
67 delete _code_blobs;
|
|
68 }
|
|
69 }
|
|
70
|
|
71 // collect list of code blobs in the cache
|
|
72 void collect();
|
|
73
|
|
74 // iteration support - return first code blob
|
|
75 JvmtiCodeBlobDesc* first() {
|
|
76 assert(_code_blobs != NULL, "not collected");
|
|
77 if (_code_blobs->length() == 0) {
|
|
78 return NULL;
|
|
79 }
|
|
80 _pos = 0;
|
|
81 return _code_blobs->at(0);
|
|
82 }
|
|
83
|
|
84 // iteration support - return next code blob
|
|
85 JvmtiCodeBlobDesc* next() {
|
|
86 assert(_pos >= 0, "iteration not started");
|
|
87 if (_pos+1 >= _code_blobs->length()) {
|
|
88 return NULL;
|
|
89 }
|
|
90 return _code_blobs->at(++_pos);
|
|
91 }
|
|
92
|
|
93 };
|
|
94
|
|
95 // used during collection
|
|
96 GrowableArray<JvmtiCodeBlobDesc*>* CodeBlobCollector::_global_code_blobs;
|
|
97
|
|
98
|
|
99 // called for each CodeBlob in the CodeCache
|
|
100 //
|
|
101 // This function filters out nmethods as it is only interested in
|
|
102 // other CodeBlobs. This function also filters out CodeBlobs that have
|
|
103 // a duplicate starting address as previous blobs. This is needed to
|
|
104 // handle the case where multiple stubs are generated into a single
|
|
105 // BufferBlob.
|
|
106
|
|
107 void CodeBlobCollector::do_blob(CodeBlob* cb) {
|
|
108
|
|
109 // ignore nmethods
|
|
110 if (cb->is_nmethod()) {
|
|
111 return;
|
|
112 }
|
|
113
|
|
114 // check if this starting address has been seen already - the
|
|
115 // assumption is that stubs are inserted into the list before the
|
|
116 // enclosing BufferBlobs.
|
|
117 address addr = cb->instructions_begin();
|
|
118 for (int i=0; i<_global_code_blobs->length(); i++) {
|
|
119 JvmtiCodeBlobDesc* scb = _global_code_blobs->at(i);
|
|
120 if (addr == scb->code_begin()) {
|
|
121 return;
|
|
122 }
|
|
123 }
|
|
124
|
|
125 // we must name the CodeBlob - some CodeBlobs already have names :-
|
|
126 // - stubs used by compiled code to call a (static) C++ runtime routine
|
|
127 // - non-relocatable machine code such as the interpreter, stubroutines, etc.
|
|
128 // - various singleton blobs
|
|
129 //
|
|
130 // others are unnamed so we create a name :-
|
|
131 // - OSR adapter (interpreter frame that has been on-stack replaced)
|
|
132 // - I2C and C2I adapters
|
|
133 const char* name = NULL;
|
|
134 if (cb->is_runtime_stub()) {
|
|
135 name = ((RuntimeStub*)cb)->name();
|
|
136 }
|
|
137 if (cb->is_buffer_blob()) {
|
|
138 name = ((BufferBlob*)cb)->name();
|
|
139 }
|
|
140 if (cb->is_deoptimization_stub() || cb->is_safepoint_stub()) {
|
|
141 name = ((SingletonBlob*)cb)->name();
|
|
142 }
|
|
143 if (cb->is_uncommon_trap_stub() || cb->is_exception_stub()) {
|
|
144 name = ((SingletonBlob*)cb)->name();
|
|
145 }
|
|
146
|
|
147 // record the CodeBlob details as a JvmtiCodeBlobDesc
|
|
148 JvmtiCodeBlobDesc* scb = new JvmtiCodeBlobDesc(name, cb->instructions_begin(),
|
|
149 cb->instructions_end());
|
|
150 _global_code_blobs->append(scb);
|
|
151 }
|
|
152
|
|
153
|
|
154 // collects a list of CodeBlobs in the CodeCache.
|
|
155 //
|
|
156 // The created list is growable array of JvmtiCodeBlobDesc - each one describes
|
|
157 // a CodeBlob. Note that the list is static - this is because CodeBlob::blobs_do
|
|
158 // requires a a C or static function so we can't use an instance function. This
|
|
159 // isn't a problem as the iteration is serial anyway as we need the CodeCache_lock
|
|
160 // to iterate over the code cache.
|
|
161 //
|
|
162 // Note that the CodeBlobs in the CodeCache will include BufferBlobs that may
|
|
163 // contain multiple stubs. As a profiler is interested in the stubs rather than
|
|
164 // the enclosing container we first iterate over the stub code descriptors so
|
|
165 // that the stubs go into the list first. do_blob will then filter out the
|
|
166 // enclosing blobs if the starting address of the enclosing blobs matches the
|
|
167 // starting address of first stub generated in the enclosing blob.
|
|
168
|
|
169 void CodeBlobCollector::collect() {
|
|
170 assert_locked_or_safepoint(CodeCache_lock);
|
|
171 assert(_global_code_blobs == NULL, "checking");
|
|
172
|
|
173 // create the global list
|
|
174 _global_code_blobs = new (ResourceObj::C_HEAP) GrowableArray<JvmtiCodeBlobDesc*>(50,true);
|
|
175
|
|
176 // iterate over the stub code descriptors and put them in the list first.
|
|
177 int index = 0;
|
|
178 StubCodeDesc* desc;
|
|
179 while ((desc = StubCodeDesc::desc_for_index(++index)) != NULL) {
|
|
180 _global_code_blobs->append(new JvmtiCodeBlobDesc(desc->name(), desc->begin(), desc->end()));
|
|
181 }
|
|
182
|
|
183 // next iterate over all the non-nmethod code blobs and add them to
|
|
184 // the list - as noted above this will filter out duplicates and
|
|
185 // enclosing blobs.
|
|
186 CodeCache::blobs_do(do_blob);
|
|
187
|
|
188 // make the global list the instance list so that it can be used
|
|
189 // for other iterations.
|
|
190 _code_blobs = _global_code_blobs;
|
|
191 _global_code_blobs = NULL;
|
|
192 }
|
|
193
|
|
194
|
|
195 // Generate a DYNAMIC_CODE_GENERATED event for each non-nmethod code blob.
|
|
196
|
|
197 jvmtiError JvmtiCodeBlobEvents::generate_dynamic_code_events(JvmtiEnv* env) {
|
|
198 CodeBlobCollector collector;
|
|
199
|
|
200 // first collect all the code blobs
|
|
201 {
|
|
202 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
|
|
203 collector.collect();
|
|
204 }
|
|
205
|
|
206 // iterate over the collected list and post an event for each blob
|
|
207 JvmtiCodeBlobDesc* blob = collector.first();
|
|
208 while (blob != NULL) {
|
|
209 JvmtiExport::post_dynamic_code_generated(env, blob->name(), blob->code_begin(), blob->code_end());
|
|
210 blob = collector.next();
|
|
211 }
|
|
212 return JVMTI_ERROR_NONE;
|
|
213 }
|
|
214
|
|
215
|
|
216 // Support class to describe a nmethod in the CodeCache
|
|
217
|
|
218 class nmethodDesc: public CHeapObj {
|
|
219 private:
|
|
220 methodHandle _method;
|
|
221 address _code_begin;
|
|
222 address _code_end;
|
|
223 jvmtiAddrLocationMap* _map;
|
|
224 jint _map_length;
|
|
225 public:
|
|
226 nmethodDesc(methodHandle method, address code_begin, address code_end,
|
|
227 jvmtiAddrLocationMap* map, jint map_length) {
|
|
228 _method = method;
|
|
229 _code_begin = code_begin;
|
|
230 _code_end = code_end;
|
|
231 _map = map;
|
|
232 _map_length = map_length;
|
|
233 }
|
|
234 methodHandle method() const { return _method; }
|
|
235 address code_begin() const { return _code_begin; }
|
|
236 address code_end() const { return _code_end; }
|
|
237 jvmtiAddrLocationMap* map() const { return _map; }
|
|
238 jint map_length() const { return _map_length; }
|
|
239 };
|
|
240
|
|
241
|
|
242 // Support class to collect a list of the nmethod CodeBlobs in
|
|
243 // the CodeCache.
|
|
244 //
|
|
245 // Usage :-
|
|
246 //
|
|
247 // nmethodCollector collector;
|
|
248 //
|
|
249 // collector.collect();
|
|
250 // JvmtiCodeBlobDesc* blob = collector.first();
|
|
251 // while (blob != NULL) {
|
|
252 // :
|
|
253 // blob = collector.next();
|
|
254 // }
|
|
255 //
|
|
256 class nmethodCollector : StackObj {
|
|
257 private:
|
|
258 GrowableArray<nmethodDesc*>* _nmethods; // collect nmethods
|
|
259 int _pos; // iteration support
|
|
260
|
|
261 // used during a collection
|
|
262 static GrowableArray<nmethodDesc*>* _global_nmethods;
|
|
263 static void do_nmethod(nmethod* nm);
|
|
264 public:
|
|
265 nmethodCollector() {
|
|
266 _nmethods = NULL;
|
|
267 _pos = -1;
|
|
268 }
|
|
269 ~nmethodCollector() {
|
|
270 if (_nmethods != NULL) {
|
|
271 for (int i=0; i<_nmethods->length(); i++) {
|
|
272 nmethodDesc* blob = _nmethods->at(i);
|
|
273 if (blob->map()!= NULL) {
|
|
274 FREE_C_HEAP_ARRAY(jvmtiAddrLocationMap, blob->map());
|
|
275 }
|
|
276 }
|
|
277 delete _nmethods;
|
|
278 }
|
|
279 }
|
|
280
|
|
281 // collect list of nmethods in the cache
|
|
282 void collect();
|
|
283
|
|
284 // iteration support - return first code blob
|
|
285 nmethodDesc* first() {
|
|
286 assert(_nmethods != NULL, "not collected");
|
|
287 if (_nmethods->length() == 0) {
|
|
288 return NULL;
|
|
289 }
|
|
290 _pos = 0;
|
|
291 return _nmethods->at(0);
|
|
292 }
|
|
293
|
|
294 // iteration support - return next code blob
|
|
295 nmethodDesc* next() {
|
|
296 assert(_pos >= 0, "iteration not started");
|
|
297 if (_pos+1 >= _nmethods->length()) {
|
|
298 return NULL;
|
|
299 }
|
|
300 return _nmethods->at(++_pos);
|
|
301 }
|
|
302 };
|
|
303
|
|
304 // used during collection
|
|
305 GrowableArray<nmethodDesc*>* nmethodCollector::_global_nmethods;
|
|
306
|
|
307
|
|
308 // called for each nmethod in the CodeCache
|
|
309 //
|
|
310 // This function simply adds a descriptor for each nmethod to the global list.
|
|
311
|
|
312 void nmethodCollector::do_nmethod(nmethod* nm) {
|
|
313 // ignore zombies
|
|
314 if (!nm->is_alive()) {
|
|
315 return;
|
|
316 }
|
|
317
|
|
318 assert(nm->method() != NULL, "checking");
|
|
319
|
|
320 // create the location map for the nmethod.
|
|
321 jvmtiAddrLocationMap* map;
|
|
322 jint map_length;
|
|
323 JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nm, &map, &map_length);
|
|
324
|
|
325 // record the nmethod details
|
|
326 methodHandle mh(nm->method());
|
|
327 nmethodDesc* snm = new nmethodDesc(mh,
|
|
328 nm->code_begin(),
|
|
329 nm->code_end(),
|
|
330 map,
|
|
331 map_length);
|
|
332 _global_nmethods->append(snm);
|
|
333 }
|
|
334
|
|
335 // collects a list of nmethod in the CodeCache.
|
|
336 //
|
|
337 // The created list is growable array of nmethodDesc - each one describes
|
|
338 // a nmethod and includs its JVMTI address location map.
|
|
339
|
|
340 void nmethodCollector::collect() {
|
|
341 assert_locked_or_safepoint(CodeCache_lock);
|
|
342 assert(_global_nmethods == NULL, "checking");
|
|
343
|
|
344 // create the list
|
|
345 _global_nmethods = new (ResourceObj::C_HEAP) GrowableArray<nmethodDesc*>(100,true);
|
|
346
|
|
347 // any a descriptor for each nmethod to the list.
|
|
348 CodeCache::nmethods_do(do_nmethod);
|
|
349
|
|
350 // make the list the instance list
|
|
351 _nmethods = _global_nmethods;
|
|
352 _global_nmethods = NULL;
|
|
353 }
|
|
354
|
|
355 // Generate a COMPILED_METHOD_LOAD event for each nnmethod
|
|
356
|
|
357 jvmtiError JvmtiCodeBlobEvents::generate_compiled_method_load_events(JvmtiEnv* env) {
|
|
358 HandleMark hm;
|
|
359 nmethodCollector collector;
|
|
360
|
|
361 // first collect all nmethods
|
|
362 {
|
|
363 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
|
|
364 collector.collect();
|
|
365 }
|
|
366
|
|
367 // iterate over the list and post an event for each nmethod
|
|
368 nmethodDesc* nm_desc = collector.first();
|
|
369 while (nm_desc != NULL) {
|
|
370 methodOop method = nm_desc->method()();
|
|
371 jmethodID mid = method->jmethod_id();
|
|
372 assert(mid != NULL, "checking");
|
|
373 JvmtiExport::post_compiled_method_load(env, mid,
|
|
374 (jint)(nm_desc->code_end() - nm_desc->code_begin()),
|
|
375 nm_desc->code_begin(), nm_desc->map_length(),
|
|
376 nm_desc->map());
|
|
377 nm_desc = collector.next();
|
|
378 }
|
|
379 return JVMTI_ERROR_NONE;
|
|
380 }
|
|
381
|
|
382
|
|
383 // create a C-heap allocated address location map for an nmethod
|
|
384 void JvmtiCodeBlobEvents::build_jvmti_addr_location_map(nmethod *nm,
|
|
385 jvmtiAddrLocationMap** map_ptr,
|
|
386 jint *map_length_ptr)
|
|
387 {
|
|
388 ResourceMark rm;
|
|
389 jvmtiAddrLocationMap* map = NULL;
|
|
390 jint map_length = 0;
|
|
391
|
|
392
|
|
393 // Generate line numbers using PcDesc and ScopeDesc info
|
|
394 methodHandle mh(nm->method());
|
|
395
|
|
396 if (!mh->is_native()) {
|
|
397 PcDesc *pcd;
|
|
398 int pcds_in_method;
|
|
399
|
|
400 pcds_in_method = (nm->scopes_pcs_end() - nm->scopes_pcs_begin());
|
|
401 map = NEW_C_HEAP_ARRAY(jvmtiAddrLocationMap, pcds_in_method);
|
|
402
|
|
403 address scopes_data = nm->scopes_data_begin();
|
|
404 for( pcd = nm->scopes_pcs_begin(); pcd < nm->scopes_pcs_end(); ++pcd ) {
|
|
405 ScopeDesc sc0(nm, pcd->scope_decode_offset());
|
|
406 ScopeDesc *sd = &sc0;
|
|
407 while( !sd->is_top() ) { sd = sd->sender(); }
|
|
408 int bci = sd->bci();
|
|
409 if (bci != InvocationEntryBci) {
|
|
410 assert(map_length < pcds_in_method, "checking");
|
|
411 map[map_length].start_address = (const void*)pcd->real_pc(nm);
|
|
412 map[map_length].location = bci;
|
|
413 ++map_length;
|
|
414 }
|
|
415 }
|
|
416 }
|
|
417
|
|
418 *map_ptr = map;
|
|
419 *map_length_ptr = map_length;
|
|
420 }
|