Mercurial > hg > truffle
annotate src/share/vm/classfile/classLoader.cpp @ 1972:f95d63e2154a
6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
author | stefank |
---|---|
date | Tue, 23 Nov 2010 13:22:55 -0800 |
parents | d5d065957597 |
children | 828eafbd85cc |
rev | line source |
---|---|
0 | 1 /* |
1644
2a47bd84841f
6965184: possible races in make_not_entrant_or_zombie
never
parents:
1552
diff
changeset
|
2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1188
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1188
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1188
diff
changeset
|
21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/classFileParser.hpp" | |
27 #include "classfile/classFileStream.hpp" | |
28 #include "classfile/classLoader.hpp" | |
29 #include "classfile/javaClasses.hpp" | |
30 #include "classfile/systemDictionary.hpp" | |
31 #include "classfile/vmSymbols.hpp" | |
32 #include "compiler/compileBroker.hpp" | |
33 #include "gc_interface/collectedHeap.inline.hpp" | |
34 #include "interpreter/bytecodeStream.hpp" | |
35 #include "interpreter/oopMapCache.hpp" | |
36 #include "memory/allocation.inline.hpp" | |
37 #include "memory/generation.hpp" | |
38 #include "memory/oopFactory.hpp" | |
39 #include "memory/universe.inline.hpp" | |
40 #include "oops/constantPoolKlass.hpp" | |
41 #include "oops/instanceKlass.hpp" | |
42 #include "oops/instanceRefKlass.hpp" | |
43 #include "oops/oop.inline.hpp" | |
44 #include "oops/symbolOop.hpp" | |
45 #include "prims/jvm_misc.hpp" | |
46 #include "runtime/arguments.hpp" | |
47 #include "runtime/compilationPolicy.hpp" | |
48 #include "runtime/fprofiler.hpp" | |
49 #include "runtime/handles.hpp" | |
50 #include "runtime/handles.inline.hpp" | |
51 #include "runtime/hpi.hpp" | |
52 #include "runtime/init.hpp" | |
53 #include "runtime/interfaceSupport.hpp" | |
54 #include "runtime/java.hpp" | |
55 #include "runtime/javaCalls.hpp" | |
56 #include "runtime/threadCritical.hpp" | |
57 #include "runtime/timer.hpp" | |
58 #include "services/management.hpp" | |
59 #include "services/threadService.hpp" | |
60 #include "utilities/events.hpp" | |
61 #include "utilities/hashtable.hpp" | |
62 #include "utilities/hashtable.inline.hpp" | |
63 #ifdef TARGET_OS_FAMILY_linux | |
64 # include "hpi_linux.hpp" | |
65 # include "os_linux.inline.hpp" | |
66 #endif | |
67 #ifdef TARGET_OS_FAMILY_solaris | |
68 # include "hpi_solaris.hpp" | |
69 # include "os_solaris.inline.hpp" | |
70 #endif | |
71 #ifdef TARGET_OS_FAMILY_windows | |
72 # include "hpi_windows.hpp" | |
73 # include "os_windows.inline.hpp" | |
74 #endif | |
0 | 75 |
76 | |
77 // Entry points in zip.dll for loading zip/jar file entries | |
78 | |
79 typedef void * * (JNICALL *ZipOpen_t)(const char *name, char **pmsg); | |
80 typedef void (JNICALL *ZipClose_t)(jzfile *zip); | |
81 typedef jzentry* (JNICALL *FindEntry_t)(jzfile *zip, const char *name, jint *sizeP, jint *nameLen); | |
82 typedef jboolean (JNICALL *ReadEntry_t)(jzfile *zip, jzentry *entry, unsigned char *buf, char *namebuf); | |
83 typedef jboolean (JNICALL *ReadMappedEntry_t)(jzfile *zip, jzentry *entry, unsigned char **buf, char *namebuf); | |
84 typedef jzentry* (JNICALL *GetNextEntry_t)(jzfile *zip, jint n); | |
85 | |
86 static ZipOpen_t ZipOpen = NULL; | |
87 static ZipClose_t ZipClose = NULL; | |
88 static FindEntry_t FindEntry = NULL; | |
89 static ReadEntry_t ReadEntry = NULL; | |
90 static ReadMappedEntry_t ReadMappedEntry = NULL; | |
91 static GetNextEntry_t GetNextEntry = NULL; | |
92 static canonicalize_fn_t CanonicalizeEntry = NULL; | |
93 | |
94 // Globals | |
95 | |
96 PerfCounter* ClassLoader::_perf_accumulated_time = NULL; | |
97 PerfCounter* ClassLoader::_perf_classes_inited = NULL; | |
98 PerfCounter* ClassLoader::_perf_class_init_time = NULL; | |
875
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
99 PerfCounter* ClassLoader::_perf_class_init_selftime = NULL; |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
100 PerfCounter* ClassLoader::_perf_classes_verified = NULL; |
0 | 101 PerfCounter* ClassLoader::_perf_class_verify_time = NULL; |
875
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
102 PerfCounter* ClassLoader::_perf_class_verify_selftime = NULL; |
0 | 103 PerfCounter* ClassLoader::_perf_classes_linked = NULL; |
104 PerfCounter* ClassLoader::_perf_class_link_time = NULL; | |
875
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
105 PerfCounter* ClassLoader::_perf_class_link_selftime = NULL; |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
106 PerfCounter* ClassLoader::_perf_class_parse_time = NULL; |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
107 PerfCounter* ClassLoader::_perf_class_parse_selftime = NULL; |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
108 PerfCounter* ClassLoader::_perf_sys_class_lookup_time = NULL; |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
109 PerfCounter* ClassLoader::_perf_shared_classload_time = NULL; |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
110 PerfCounter* ClassLoader::_perf_sys_classload_time = NULL; |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
111 PerfCounter* ClassLoader::_perf_app_classload_time = NULL; |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
112 PerfCounter* ClassLoader::_perf_app_classload_selftime = NULL; |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
113 PerfCounter* ClassLoader::_perf_app_classload_count = NULL; |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
114 PerfCounter* ClassLoader::_perf_define_appclasses = NULL; |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
115 PerfCounter* ClassLoader::_perf_define_appclass_time = NULL; |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
116 PerfCounter* ClassLoader::_perf_define_appclass_selftime = NULL; |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
117 PerfCounter* ClassLoader::_perf_app_classfile_bytes_read = NULL; |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
118 PerfCounter* ClassLoader::_perf_sys_classfile_bytes_read = NULL; |
0 | 119 PerfCounter* ClassLoader::_sync_systemLoaderLockContentionRate = NULL; |
120 PerfCounter* ClassLoader::_sync_nonSystemLoaderLockContentionRate = NULL; | |
121 PerfCounter* ClassLoader::_sync_JVMFindLoadedClassLockFreeCounter = NULL; | |
122 PerfCounter* ClassLoader::_sync_JVMDefineClassLockFreeCounter = NULL; | |
123 PerfCounter* ClassLoader::_sync_JNIDefineClassLockFreeCounter = NULL; | |
124 PerfCounter* ClassLoader::_unsafe_defineClassCallCounter = NULL; | |
125 PerfCounter* ClassLoader::_isUnsyncloadClass = NULL; | |
126 PerfCounter* ClassLoader::_load_instance_class_failCounter = NULL; | |
127 | |
128 ClassPathEntry* ClassLoader::_first_entry = NULL; | |
129 ClassPathEntry* ClassLoader::_last_entry = NULL; | |
130 PackageHashtable* ClassLoader::_package_hash_table = NULL; | |
131 | |
132 // helper routines | |
133 bool string_starts_with(const char* str, const char* str_to_find) { | |
134 size_t str_len = strlen(str); | |
135 size_t str_to_find_len = strlen(str_to_find); | |
136 if (str_to_find_len > str_len) { | |
137 return false; | |
138 } | |
139 return (strncmp(str, str_to_find, str_to_find_len) == 0); | |
140 } | |
141 | |
142 bool string_ends_with(const char* str, const char* str_to_find) { | |
143 size_t str_len = strlen(str); | |
144 size_t str_to_find_len = strlen(str_to_find); | |
145 if (str_to_find_len > str_len) { | |
146 return false; | |
147 } | |
148 return (strncmp(str + (str_len - str_to_find_len), str_to_find, str_to_find_len) == 0); | |
149 } | |
150 | |
151 | |
152 MetaIndex::MetaIndex(char** meta_package_names, int num_meta_package_names) { | |
153 if (num_meta_package_names == 0) { | |
154 _meta_package_names = NULL; | |
155 _num_meta_package_names = 0; | |
156 } else { | |
157 _meta_package_names = NEW_C_HEAP_ARRAY(char*, num_meta_package_names); | |
158 _num_meta_package_names = num_meta_package_names; | |
159 memcpy(_meta_package_names, meta_package_names, num_meta_package_names * sizeof(char*)); | |
160 } | |
161 } | |
162 | |
163 | |
164 MetaIndex::~MetaIndex() { | |
165 FREE_C_HEAP_ARRAY(char*, _meta_package_names); | |
166 } | |
167 | |
168 | |
169 bool MetaIndex::may_contain(const char* class_name) { | |
170 if ( _num_meta_package_names == 0) { | |
171 return false; | |
172 } | |
173 size_t class_name_len = strlen(class_name); | |
174 for (int i = 0; i < _num_meta_package_names; i++) { | |
175 char* pkg = _meta_package_names[i]; | |
176 size_t pkg_len = strlen(pkg); | |
177 size_t min_len = MIN2(class_name_len, pkg_len); | |
178 if (!strncmp(class_name, pkg, min_len)) { | |
179 return true; | |
180 } | |
181 } | |
182 return false; | |
183 } | |
184 | |
185 | |
186 ClassPathEntry::ClassPathEntry() { | |
187 set_next(NULL); | |
188 } | |
189 | |
190 | |
191 bool ClassPathEntry::is_lazy() { | |
192 return false; | |
193 } | |
194 | |
195 ClassPathDirEntry::ClassPathDirEntry(char* dir) : ClassPathEntry() { | |
196 _dir = NEW_C_HEAP_ARRAY(char, strlen(dir)+1); | |
197 strcpy(_dir, dir); | |
198 } | |
199 | |
200 | |
201 ClassFileStream* ClassPathDirEntry::open_stream(const char* name) { | |
202 // construct full path name | |
203 char path[JVM_MAXPATHLEN]; | |
204 if (jio_snprintf(path, sizeof(path), "%s%s%s", _dir, os::file_separator(), name) == -1) { | |
205 return NULL; | |
206 } | |
207 // check if file exists | |
208 struct stat st; | |
209 if (os::stat(path, &st) == 0) { | |
210 // found file, open it | |
211 int file_handle = hpi::open(path, 0, 0); | |
212 if (file_handle != -1) { | |
213 // read contents into resource array | |
214 u1* buffer = NEW_RESOURCE_ARRAY(u1, st.st_size); | |
215 size_t num_read = os::read(file_handle, (char*) buffer, st.st_size); | |
216 // close file | |
217 hpi::close(file_handle); | |
218 // construct ClassFileStream | |
219 if (num_read == (size_t)st.st_size) { | |
875
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
220 if (UsePerfData) { |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
221 ClassLoader::perf_sys_classfile_bytes_read()->inc(num_read); |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
222 } |
0 | 223 return new ClassFileStream(buffer, st.st_size, _dir); // Resource allocated |
224 } | |
225 } | |
226 } | |
227 return NULL; | |
228 } | |
229 | |
230 | |
231 ClassPathZipEntry::ClassPathZipEntry(jzfile* zip, const char* zip_name) : ClassPathEntry() { | |
232 _zip = zip; | |
233 _zip_name = NEW_C_HEAP_ARRAY(char, strlen(zip_name)+1); | |
234 strcpy(_zip_name, zip_name); | |
235 } | |
236 | |
237 ClassPathZipEntry::~ClassPathZipEntry() { | |
238 if (ZipClose != NULL) { | |
239 (*ZipClose)(_zip); | |
240 } | |
241 FREE_C_HEAP_ARRAY(char, _zip_name); | |
242 } | |
243 | |
244 ClassFileStream* ClassPathZipEntry::open_stream(const char* name) { | |
245 // enable call to C land | |
246 JavaThread* thread = JavaThread::current(); | |
247 ThreadToNativeFromVM ttn(thread); | |
248 // check whether zip archive contains name | |
249 jint filesize, name_len; | |
250 jzentry* entry = (*FindEntry)(_zip, name, &filesize, &name_len); | |
251 if (entry == NULL) return NULL; | |
252 u1* buffer; | |
253 char name_buf[128]; | |
254 char* filename; | |
255 if (name_len < 128) { | |
256 filename = name_buf; | |
257 } else { | |
258 filename = NEW_RESOURCE_ARRAY(char, name_len + 1); | |
259 } | |
260 | |
261 // file found, get pointer to class in mmaped jar file. | |
262 if (ReadMappedEntry == NULL || | |
263 !(*ReadMappedEntry)(_zip, entry, &buffer, filename)) { | |
264 // mmaped access not available, perhaps due to compression, | |
265 // read contents into resource array | |
266 buffer = NEW_RESOURCE_ARRAY(u1, filesize); | |
267 if (!(*ReadEntry)(_zip, entry, buffer, filename)) return NULL; | |
268 } | |
875
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
269 if (UsePerfData) { |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
270 ClassLoader::perf_sys_classfile_bytes_read()->inc(filesize); |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
271 } |
0 | 272 // return result |
273 return new ClassFileStream(buffer, filesize, _zip_name); // Resource allocated | |
274 } | |
275 | |
276 // invoke function for each entry in the zip file | |
277 void ClassPathZipEntry::contents_do(void f(const char* name, void* context), void* context) { | |
278 JavaThread* thread = JavaThread::current(); | |
279 HandleMark handle_mark(thread); | |
280 ThreadToNativeFromVM ttn(thread); | |
281 for (int n = 0; ; n++) { | |
282 jzentry * ze = ((*GetNextEntry)(_zip, n)); | |
283 if (ze == NULL) break; | |
284 (*f)(ze->name, context); | |
285 } | |
286 } | |
287 | |
288 LazyClassPathEntry::LazyClassPathEntry(char* path, struct stat st) : ClassPathEntry() { | |
289 _path = strdup(path); | |
290 _st = st; | |
291 _meta_index = NULL; | |
292 _resolved_entry = NULL; | |
293 } | |
294 | |
295 bool LazyClassPathEntry::is_jar_file() { | |
296 return ((_st.st_mode & S_IFREG) == S_IFREG); | |
297 } | |
298 | |
299 ClassPathEntry* LazyClassPathEntry::resolve_entry() { | |
300 if (_resolved_entry != NULL) { | |
301 return (ClassPathEntry*) _resolved_entry; | |
302 } | |
303 ClassPathEntry* new_entry = NULL; | |
304 ClassLoader::create_class_path_entry(_path, _st, &new_entry, false); | |
305 assert(new_entry != NULL, "earlier code should have caught this"); | |
306 { | |
307 ThreadCritical tc; | |
308 if (_resolved_entry == NULL) { | |
309 _resolved_entry = new_entry; | |
310 return new_entry; | |
311 } | |
312 } | |
313 assert(_resolved_entry != NULL, "bug in MT-safe resolution logic"); | |
314 delete new_entry; | |
315 return (ClassPathEntry*) _resolved_entry; | |
316 } | |
317 | |
318 ClassFileStream* LazyClassPathEntry::open_stream(const char* name) { | |
319 if (_meta_index != NULL && | |
320 !_meta_index->may_contain(name)) { | |
321 return NULL; | |
322 } | |
323 return resolve_entry()->open_stream(name); | |
324 } | |
325 | |
326 bool LazyClassPathEntry::is_lazy() { | |
327 return true; | |
328 } | |
329 | |
330 static void print_meta_index(LazyClassPathEntry* entry, | |
331 GrowableArray<char*>& meta_packages) { | |
332 tty->print("[Meta index for %s=", entry->name()); | |
333 for (int i = 0; i < meta_packages.length(); i++) { | |
334 if (i > 0) tty->print(" "); | |
335 tty->print(meta_packages.at(i)); | |
336 } | |
337 tty->print_cr("]"); | |
338 } | |
339 | |
340 | |
341 void ClassLoader::setup_meta_index() { | |
342 // Set up meta index which allows us to open boot jars lazily if | |
343 // class data sharing is enabled | |
344 const char* known_version = "% VERSION 2"; | |
345 char* meta_index_path = Arguments::get_meta_index_path(); | |
346 char* meta_index_dir = Arguments::get_meta_index_dir(); | |
347 FILE* file = fopen(meta_index_path, "r"); | |
348 int line_no = 0; | |
349 if (file != NULL) { | |
350 ResourceMark rm; | |
351 LazyClassPathEntry* cur_entry = NULL; | |
352 GrowableArray<char*> boot_class_path_packages(10); | |
353 char package_name[256]; | |
354 bool skipCurrentJar = false; | |
355 while (fgets(package_name, sizeof(package_name), file) != NULL) { | |
356 ++line_no; | |
357 // Remove trailing newline | |
358 package_name[strlen(package_name) - 1] = '\0'; | |
359 switch(package_name[0]) { | |
360 case '%': | |
361 { | |
362 if ((line_no == 1) && (strcmp(package_name, known_version) != 0)) { | |
363 if (TraceClassLoading && Verbose) { | |
364 tty->print("[Unsupported meta index version]"); | |
365 } | |
366 fclose(file); | |
367 return; | |
368 } | |
369 } | |
370 | |
371 // These directives indicate jar files which contain only | |
372 // classes, only non-classfile resources, or a combination of | |
373 // the two. See src/share/classes/sun/misc/MetaIndex.java and | |
374 // make/tools/MetaIndex/BuildMetaIndex.java in the J2SE | |
375 // workspace. | |
376 case '#': | |
377 case '!': | |
378 case '@': | |
379 { | |
380 // Hand off current packages to current lazy entry (if any) | |
381 if ((cur_entry != NULL) && | |
382 (boot_class_path_packages.length() > 0)) { | |
383 if (TraceClassLoading && Verbose) { | |
384 print_meta_index(cur_entry, boot_class_path_packages); | |
385 } | |
386 MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0), | |
387 boot_class_path_packages.length()); | |
388 cur_entry->set_meta_index(index); | |
389 } | |
390 cur_entry = NULL; | |
391 boot_class_path_packages.clear(); | |
392 | |
393 // Find lazy entry corresponding to this jar file | |
394 for (ClassPathEntry* entry = _first_entry; entry != NULL; entry = entry->next()) { | |
395 if (entry->is_lazy() && | |
396 string_starts_with(entry->name(), meta_index_dir) && | |
397 string_ends_with(entry->name(), &package_name[2])) { | |
398 cur_entry = (LazyClassPathEntry*) entry; | |
399 break; | |
400 } | |
401 } | |
402 | |
403 // If the first character is '@', it indicates the following jar | |
404 // file is a resource only jar file in which case, we should skip | |
405 // reading the subsequent entries since the resource loading is | |
406 // totally handled by J2SE side. | |
407 if (package_name[0] == '@') { | |
408 if (cur_entry != NULL) { | |
409 cur_entry->set_meta_index(new MetaIndex(NULL, 0)); | |
410 } | |
411 cur_entry = NULL; | |
412 skipCurrentJar = true; | |
413 } else { | |
414 skipCurrentJar = false; | |
415 } | |
416 | |
417 break; | |
418 } | |
419 | |
420 default: | |
421 { | |
422 if (!skipCurrentJar && cur_entry != NULL) { | |
423 char* new_name = strdup(package_name); | |
424 boot_class_path_packages.append(new_name); | |
425 } | |
426 } | |
427 } | |
428 } | |
429 // Hand off current packages to current lazy entry (if any) | |
430 if ((cur_entry != NULL) && | |
431 (boot_class_path_packages.length() > 0)) { | |
432 if (TraceClassLoading && Verbose) { | |
433 print_meta_index(cur_entry, boot_class_path_packages); | |
434 } | |
435 MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0), | |
436 boot_class_path_packages.length()); | |
437 cur_entry->set_meta_index(index); | |
438 } | |
439 fclose(file); | |
440 } | |
441 } | |
442 | |
443 void ClassLoader::setup_bootstrap_search_path() { | |
444 assert(_first_entry == NULL, "should not setup bootstrap class search path twice"); | |
445 char* sys_class_path = os::strdup(Arguments::get_sysclasspath()); | |
446 if (TraceClassLoading && Verbose) { | |
447 tty->print_cr("[Bootstrap loader class path=%s]", sys_class_path); | |
448 } | |
449 | |
450 int len = (int)strlen(sys_class_path); | |
451 int end = 0; | |
452 | |
453 // Iterate over class path entries | |
454 for (int start = 0; start < len; start = end) { | |
455 while (sys_class_path[end] && sys_class_path[end] != os::path_separator()[0]) { | |
456 end++; | |
457 } | |
458 char* path = NEW_C_HEAP_ARRAY(char, end-start+1); | |
459 strncpy(path, &sys_class_path[start], end-start); | |
460 path[end-start] = '\0'; | |
461 update_class_path_entry_list(path, false); | |
462 FREE_C_HEAP_ARRAY(char, path); | |
463 while (sys_class_path[end] == os::path_separator()[0]) { | |
464 end++; | |
465 } | |
466 } | |
467 } | |
468 | |
469 void ClassLoader::create_class_path_entry(char *path, struct stat st, ClassPathEntry **new_entry, bool lazy) { | |
470 JavaThread* thread = JavaThread::current(); | |
471 if (lazy) { | |
472 *new_entry = new LazyClassPathEntry(path, st); | |
473 return; | |
474 } | |
475 if ((st.st_mode & S_IFREG) == S_IFREG) { | |
476 // Regular file, should be a zip file | |
477 // Canonicalized filename | |
478 char canonical_path[JVM_MAXPATHLEN]; | |
479 if (!get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) { | |
480 // This matches the classic VM | |
481 EXCEPTION_MARK; | |
482 THROW_MSG(vmSymbols::java_io_IOException(), "Bad pathname"); | |
483 } | |
484 char* error_msg = NULL; | |
485 jzfile* zip; | |
486 { | |
487 // enable call to C land | |
488 ThreadToNativeFromVM ttn(thread); | |
489 HandleMark hm(thread); | |
490 zip = (*ZipOpen)(canonical_path, &error_msg); | |
491 } | |
492 if (zip != NULL && error_msg == NULL) { | |
493 *new_entry = new ClassPathZipEntry(zip, path); | |
494 if (TraceClassLoading) { | |
495 tty->print_cr("[Opened %s]", path); | |
496 } | |
497 } else { | |
498 ResourceMark rm(thread); | |
499 char *msg; | |
500 if (error_msg == NULL) { | |
501 msg = NEW_RESOURCE_ARRAY(char, strlen(path) + 128); ; | |
502 jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path); | |
503 } else { | |
504 int len = (int)(strlen(path) + strlen(error_msg) + 128); | |
505 msg = NEW_RESOURCE_ARRAY(char, len); ; | |
506 jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path); | |
507 } | |
508 EXCEPTION_MARK; | |
509 THROW_MSG(vmSymbols::java_lang_ClassNotFoundException(), msg); | |
510 } | |
511 } else { | |
512 // Directory | |
513 *new_entry = new ClassPathDirEntry(path); | |
514 if (TraceClassLoading) { | |
515 tty->print_cr("[Path %s]", path); | |
516 } | |
517 } | |
518 } | |
519 | |
520 | |
521 // Create a class path zip entry for a given path (return NULL if not found | |
522 // or zip/JAR file cannot be opened) | |
523 ClassPathZipEntry* ClassLoader::create_class_path_zip_entry(const char *path) { | |
524 // check for a regular file | |
525 struct stat st; | |
526 if (os::stat(path, &st) == 0) { | |
527 if ((st.st_mode & S_IFREG) == S_IFREG) { | |
528 char orig_path[JVM_MAXPATHLEN]; | |
529 char canonical_path[JVM_MAXPATHLEN]; | |
530 | |
531 strcpy(orig_path, path); | |
532 if (get_canonical_path(orig_path, canonical_path, JVM_MAXPATHLEN)) { | |
533 char* error_msg = NULL; | |
534 jzfile* zip; | |
535 { | |
536 // enable call to C land | |
537 JavaThread* thread = JavaThread::current(); | |
538 ThreadToNativeFromVM ttn(thread); | |
539 HandleMark hm(thread); | |
540 zip = (*ZipOpen)(canonical_path, &error_msg); | |
541 } | |
542 if (zip != NULL && error_msg == NULL) { | |
543 // create using canonical path | |
544 return new ClassPathZipEntry(zip, canonical_path); | |
545 } | |
546 } | |
547 } | |
548 } | |
549 return NULL; | |
550 } | |
551 | |
552 // returns true if entry already on class path | |
553 bool ClassLoader::contains_entry(ClassPathEntry *entry) { | |
554 ClassPathEntry* e = _first_entry; | |
555 while (e != NULL) { | |
556 // assume zip entries have been canonicalized | |
557 if (strcmp(entry->name(), e->name()) == 0) { | |
558 return true; | |
559 } | |
560 e = e->next(); | |
561 } | |
562 return false; | |
563 } | |
564 | |
565 void ClassLoader::add_to_list(ClassPathEntry *new_entry) { | |
566 if (new_entry != NULL) { | |
567 if (_last_entry == NULL) { | |
568 _first_entry = _last_entry = new_entry; | |
569 } else { | |
570 _last_entry->set_next(new_entry); | |
571 _last_entry = new_entry; | |
572 } | |
573 } | |
574 } | |
575 | |
576 void ClassLoader::update_class_path_entry_list(const char *path, | |
577 bool check_for_duplicates) { | |
578 struct stat st; | |
579 if (os::stat((char *)path, &st) == 0) { | |
580 // File or directory found | |
581 ClassPathEntry* new_entry = NULL; | |
582 create_class_path_entry((char *)path, st, &new_entry, LazyBootClassLoader); | |
583 // The kernel VM adds dynamically to the end of the classloader path and | |
584 // doesn't reorder the bootclasspath which would break java.lang.Package | |
585 // (see PackageInfo). | |
586 // Add new entry to linked list | |
587 if (!check_for_duplicates || !contains_entry(new_entry)) { | |
588 add_to_list(new_entry); | |
589 } | |
590 } | |
591 } | |
592 | |
593 void ClassLoader::print_bootclasspath() { | |
594 ClassPathEntry* e = _first_entry; | |
595 tty->print("[bootclasspath= "); | |
596 while (e != NULL) { | |
597 tty->print("%s ;", e->name()); | |
598 e = e->next(); | |
599 } | |
600 tty->print_cr("]"); | |
601 } | |
602 | |
603 void ClassLoader::load_zip_library() { | |
604 assert(ZipOpen == NULL, "should not load zip library twice"); | |
605 // First make sure native library is loaded | |
606 os::native_java_library(); | |
607 // Load zip library | |
608 char path[JVM_MAXPATHLEN]; | |
609 char ebuf[1024]; | |
610 hpi::dll_build_name(path, sizeof(path), Arguments::get_dll_dir(), "zip"); | |
611 void* handle = hpi::dll_load(path, ebuf, sizeof ebuf); | |
612 if (handle == NULL) { | |
613 vm_exit_during_initialization("Unable to load ZIP library", path); | |
614 } | |
615 // Lookup zip entry points | |
616 ZipOpen = CAST_TO_FN_PTR(ZipOpen_t, hpi::dll_lookup(handle, "ZIP_Open")); | |
617 ZipClose = CAST_TO_FN_PTR(ZipClose_t, hpi::dll_lookup(handle, "ZIP_Close")); | |
618 FindEntry = CAST_TO_FN_PTR(FindEntry_t, hpi::dll_lookup(handle, "ZIP_FindEntry")); | |
619 ReadEntry = CAST_TO_FN_PTR(ReadEntry_t, hpi::dll_lookup(handle, "ZIP_ReadEntry")); | |
620 ReadMappedEntry = CAST_TO_FN_PTR(ReadMappedEntry_t, hpi::dll_lookup(handle, "ZIP_ReadMappedEntry")); | |
621 GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, hpi::dll_lookup(handle, "ZIP_GetNextEntry")); | |
622 | |
623 // ZIP_Close is not exported on Windows in JDK5.0 so don't abort if ZIP_Close is NULL | |
624 if (ZipOpen == NULL || FindEntry == NULL || ReadEntry == NULL || GetNextEntry == NULL) { | |
625 vm_exit_during_initialization("Corrupted ZIP library", path); | |
626 } | |
627 | |
628 // Lookup canonicalize entry in libjava.dll | |
629 void *javalib_handle = os::native_java_library(); | |
630 CanonicalizeEntry = CAST_TO_FN_PTR(canonicalize_fn_t, hpi::dll_lookup(javalib_handle, "Canonicalize")); | |
631 // This lookup only works on 1.3. Do not check for non-null here | |
632 } | |
633 | |
634 // PackageInfo data exists in order to support the java.lang.Package | |
635 // class. A Package object provides information about a java package | |
636 // (version, vendor, etc.) which originates in the manifest of the jar | |
637 // file supplying the package. For application classes, the ClassLoader | |
638 // object takes care of this. | |
639 | |
640 // For system (boot) classes, the Java code in the Package class needs | |
641 // to be able to identify which source jar file contained the boot | |
642 // class, so that it can extract the manifest from it. This table | |
643 // identifies java packages with jar files in the boot classpath. | |
644 | |
645 // Because the boot classpath cannot change, the classpath index is | |
646 // sufficient to identify the source jar file or directory. (Since | |
647 // directories have no manifests, the directory name is not required, | |
648 // but is available.) | |
649 | |
650 // When using sharing -- the pathnames of entries in the boot classpath | |
651 // may not be the same at runtime as they were when the archive was | |
652 // created (NFS, Samba, etc.). The actual files and directories named | |
653 // in the classpath must be the same files, in the same order, even | |
654 // though the exact name is not the same. | |
655 | |
656 class PackageInfo: public BasicHashtableEntry { | |
657 public: | |
658 const char* _pkgname; // Package name | |
659 int _classpath_index; // Index of directory or JAR file loaded from | |
660 | |
661 PackageInfo* next() { | |
662 return (PackageInfo*)BasicHashtableEntry::next(); | |
663 } | |
664 | |
665 const char* pkgname() { return _pkgname; } | |
666 void set_pkgname(char* pkgname) { _pkgname = pkgname; } | |
667 | |
668 const char* filename() { | |
669 return ClassLoader::classpath_entry(_classpath_index)->name(); | |
670 } | |
671 | |
672 void set_index(int index) { | |
673 _classpath_index = index; | |
674 } | |
675 }; | |
676 | |
677 | |
678 class PackageHashtable : public BasicHashtable { | |
679 private: | |
680 inline unsigned int compute_hash(const char *s, int n) { | |
681 unsigned int val = 0; | |
682 while (--n >= 0) { | |
683 val = *s++ + 31 * val; | |
684 } | |
685 return val; | |
686 } | |
687 | |
688 PackageInfo* bucket(int index) { | |
689 return (PackageInfo*)BasicHashtable::bucket(index); | |
690 } | |
691 | |
692 PackageInfo* get_entry(int index, unsigned int hash, | |
693 const char* pkgname, size_t n) { | |
694 for (PackageInfo* pp = bucket(index); pp != NULL; pp = pp->next()) { | |
695 if (pp->hash() == hash && | |
696 strncmp(pkgname, pp->pkgname(), n) == 0 && | |
697 pp->pkgname()[n] == '\0') { | |
698 return pp; | |
699 } | |
700 } | |
701 return NULL; | |
702 } | |
703 | |
704 public: | |
705 PackageHashtable(int table_size) | |
706 : BasicHashtable(table_size, sizeof(PackageInfo)) {} | |
707 | |
708 PackageHashtable(int table_size, HashtableBucket* t, int number_of_entries) | |
709 : BasicHashtable(table_size, sizeof(PackageInfo), t, number_of_entries) {} | |
710 | |
711 PackageInfo* get_entry(const char* pkgname, int n) { | |
712 unsigned int hash = compute_hash(pkgname, n); | |
713 return get_entry(hash_to_index(hash), hash, pkgname, n); | |
714 } | |
715 | |
716 PackageInfo* new_entry(char* pkgname, int n) { | |
717 unsigned int hash = compute_hash(pkgname, n); | |
718 PackageInfo* pp; | |
719 pp = (PackageInfo*)BasicHashtable::new_entry(hash); | |
720 pp->set_pkgname(pkgname); | |
721 return pp; | |
722 } | |
723 | |
724 void add_entry(PackageInfo* pp) { | |
725 int index = hash_to_index(pp->hash()); | |
726 BasicHashtable::add_entry(index, pp); | |
727 } | |
728 | |
729 void copy_pkgnames(const char** packages) { | |
730 int n = 0; | |
731 for (int i = 0; i < table_size(); ++i) { | |
732 for (PackageInfo* pp = bucket(i); pp != NULL; pp = pp->next()) { | |
733 packages[n++] = pp->pkgname(); | |
734 } | |
735 } | |
736 assert(n == number_of_entries(), "just checking"); | |
737 } | |
738 | |
739 void copy_table(char** top, char* end, PackageHashtable* table); | |
740 }; | |
741 | |
742 | |
743 void PackageHashtable::copy_table(char** top, char* end, | |
744 PackageHashtable* table) { | |
745 // Copy (relocate) the table to the shared space. | |
746 BasicHashtable::copy_table(top, end); | |
747 | |
748 // Calculate the space needed for the package name strings. | |
749 int i; | |
750 int n = 0; | |
751 for (i = 0; i < table_size(); ++i) { | |
752 for (PackageInfo* pp = table->bucket(i); | |
753 pp != NULL; | |
754 pp = pp->next()) { | |
755 n += (int)(strlen(pp->pkgname()) + 1); | |
756 } | |
757 } | |
758 if (*top + n + sizeof(intptr_t) >= end) { | |
759 warning("\nThe shared miscellaneous data space is not large " | |
760 "enough to \npreload requested classes. Use " | |
761 "-XX:SharedMiscDataSize= to increase \nthe initial " | |
762 "size of the miscellaneous data space.\n"); | |
763 exit(2); | |
764 } | |
765 | |
766 // Copy the table data (the strings) to the shared space. | |
767 n = align_size_up(n, sizeof(HeapWord)); | |
768 *(intptr_t*)(*top) = n; | |
769 *top += sizeof(intptr_t); | |
770 | |
771 for (i = 0; i < table_size(); ++i) { | |
772 for (PackageInfo* pp = table->bucket(i); | |
773 pp != NULL; | |
774 pp = pp->next()) { | |
775 int n1 = (int)(strlen(pp->pkgname()) + 1); | |
776 pp->set_pkgname((char*)memcpy(*top, pp->pkgname(), n1)); | |
777 *top += n1; | |
778 } | |
779 } | |
780 *top = (char*)align_size_up((intptr_t)*top, sizeof(HeapWord)); | |
781 } | |
782 | |
783 | |
784 void ClassLoader::copy_package_info_buckets(char** top, char* end) { | |
785 _package_hash_table->copy_buckets(top, end); | |
786 } | |
787 | |
788 void ClassLoader::copy_package_info_table(char** top, char* end) { | |
789 _package_hash_table->copy_table(top, end, _package_hash_table); | |
790 } | |
791 | |
792 | |
793 PackageInfo* ClassLoader::lookup_package(const char *pkgname) { | |
794 const char *cp = strrchr(pkgname, '/'); | |
795 if (cp != NULL) { | |
796 // Package prefix found | |
797 int n = cp - pkgname + 1; | |
798 return _package_hash_table->get_entry(pkgname, n); | |
799 } | |
800 return NULL; | |
801 } | |
802 | |
803 | |
804 bool ClassLoader::add_package(const char *pkgname, int classpath_index, TRAPS) { | |
805 assert(pkgname != NULL, "just checking"); | |
806 // Bootstrap loader no longer holds system loader lock obj serializing | |
807 // load_instance_class and thereby add_package | |
808 { | |
809 MutexLocker ml(PackageTable_lock, THREAD); | |
810 // First check for previously loaded entry | |
811 PackageInfo* pp = lookup_package(pkgname); | |
812 if (pp != NULL) { | |
813 // Existing entry found, check source of package | |
814 pp->set_index(classpath_index); | |
815 return true; | |
816 } | |
817 | |
818 const char *cp = strrchr(pkgname, '/'); | |
819 if (cp != NULL) { | |
820 // Package prefix found | |
821 int n = cp - pkgname + 1; | |
822 | |
823 char* new_pkgname = NEW_C_HEAP_ARRAY(char, n + 1); | |
824 if (new_pkgname == NULL) { | |
825 return false; | |
826 } | |
827 | |
828 memcpy(new_pkgname, pkgname, n); | |
829 new_pkgname[n] = '\0'; | |
830 pp = _package_hash_table->new_entry(new_pkgname, n); | |
831 pp->set_index(classpath_index); | |
832 | |
833 // Insert into hash table | |
834 _package_hash_table->add_entry(pp); | |
835 } | |
836 return true; | |
837 } | |
838 } | |
839 | |
840 | |
841 oop ClassLoader::get_system_package(const char* name, TRAPS) { | |
842 PackageInfo* pp; | |
843 { | |
844 MutexLocker ml(PackageTable_lock, THREAD); | |
845 pp = lookup_package(name); | |
846 } | |
847 if (pp == NULL) { | |
848 return NULL; | |
849 } else { | |
850 Handle p = java_lang_String::create_from_str(pp->filename(), THREAD); | |
851 return p(); | |
852 } | |
853 } | |
854 | |
855 | |
856 objArrayOop ClassLoader::get_system_packages(TRAPS) { | |
857 ResourceMark rm(THREAD); | |
858 int nof_entries; | |
859 const char** packages; | |
860 { | |
861 MutexLocker ml(PackageTable_lock, THREAD); | |
862 // Allocate resource char* array containing package names | |
863 nof_entries = _package_hash_table->number_of_entries(); | |
864 if ((packages = NEW_RESOURCE_ARRAY(const char*, nof_entries)) == NULL) { | |
865 return NULL; | |
866 } | |
867 _package_hash_table->copy_pkgnames(packages); | |
868 } | |
869 // Allocate objArray and fill with java.lang.String | |
1142 | 870 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 871 nof_entries, CHECK_0); |
872 objArrayHandle result(THREAD, r); | |
873 for (int i = 0; i < nof_entries; i++) { | |
874 Handle str = java_lang_String::create_from_str(packages[i], CHECK_0); | |
875 result->obj_at_put(i, str()); | |
876 } | |
877 | |
878 return result(); | |
879 } | |
880 | |
881 | |
882 instanceKlassHandle ClassLoader::load_classfile(symbolHandle h_name, TRAPS) { | |
883 ResourceMark rm(THREAD); | |
884 EventMark m("loading class " INTPTR_FORMAT, (address)h_name()); | |
885 ThreadProfilerMark tpm(ThreadProfilerMark::classLoaderRegion); | |
886 | |
887 stringStream st; | |
888 // st.print() uses too much stack space while handling a StackOverflowError | |
889 // st.print("%s.class", h_name->as_utf8()); | |
890 st.print_raw(h_name->as_utf8()); | |
891 st.print_raw(".class"); | |
892 char* name = st.as_string(); | |
893 | |
894 // Lookup stream for parsing .class file | |
895 ClassFileStream* stream = NULL; | |
896 int classpath_index = 0; | |
897 { | |
875
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
898 PerfClassTraceTime vmtimer(perf_sys_class_lookup_time(), |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
899 ((JavaThread*) THREAD)->get_thread_stat()->perf_timers_addr(), |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
900 PerfClassTraceTime::CLASS_LOAD); |
0 | 901 ClassPathEntry* e = _first_entry; |
902 while (e != NULL) { | |
903 stream = e->open_stream(name); | |
904 if (stream != NULL) { | |
905 break; | |
906 } | |
907 e = e->next(); | |
908 ++classpath_index; | |
909 } | |
910 } | |
911 | |
912 instanceKlassHandle h(THREAD, klassOop(NULL)); | |
913 if (stream != NULL) { | |
914 | |
915 // class file found, parse it | |
916 ClassFileParser parser(stream); | |
917 Handle class_loader; | |
918 Handle protection_domain; | |
919 symbolHandle parsed_name; | |
920 instanceKlassHandle result = parser.parseClassFile(h_name, | |
921 class_loader, | |
922 protection_domain, | |
923 parsed_name, | |
973
ad6585fd4087
6830542: Performance: JVM_DefineClass already verified.
acorn
parents:
882
diff
changeset
|
924 false, |
0 | 925 CHECK_(h)); |
926 | |
927 // add to package table | |
928 if (add_package(name, classpath_index, THREAD)) { | |
929 h = result; | |
930 } | |
931 } | |
932 | |
933 return h; | |
934 } | |
935 | |
936 | |
937 void ClassLoader::create_package_info_table(HashtableBucket *t, int length, | |
938 int number_of_entries) { | |
939 assert(_package_hash_table == NULL, "One package info table allowed."); | |
940 assert(length == package_hash_table_size * sizeof(HashtableBucket), | |
941 "bad shared package info size."); | |
942 _package_hash_table = new PackageHashtable(package_hash_table_size, t, | |
943 number_of_entries); | |
944 } | |
945 | |
946 | |
947 void ClassLoader::create_package_info_table() { | |
948 assert(_package_hash_table == NULL, "shouldn't have one yet"); | |
949 _package_hash_table = new PackageHashtable(package_hash_table_size); | |
950 } | |
951 | |
952 | |
953 // Initialize the class loader's access to methods in libzip. Parse and | |
954 // process the boot classpath into a list ClassPathEntry objects. Once | |
955 // this list has been created, it must not change order (see class PackageInfo) | |
956 // it can be appended to and is by jvmti and the kernel vm. | |
957 | |
958 void ClassLoader::initialize() { | |
959 assert(_package_hash_table == NULL, "should have been initialized by now."); | |
960 EXCEPTION_MARK; | |
961 | |
962 if (UsePerfData) { | |
963 // jvmstat performance counters | |
964 NEWPERFTICKCOUNTER(_perf_accumulated_time, SUN_CLS, "time"); | |
965 NEWPERFTICKCOUNTER(_perf_class_init_time, SUN_CLS, "classInitTime"); | |
875
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
966 NEWPERFTICKCOUNTER(_perf_class_init_selftime, SUN_CLS, "classInitTime.self"); |
0 | 967 NEWPERFTICKCOUNTER(_perf_class_verify_time, SUN_CLS, "classVerifyTime"); |
875
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
968 NEWPERFTICKCOUNTER(_perf_class_verify_selftime, SUN_CLS, "classVerifyTime.self"); |
0 | 969 NEWPERFTICKCOUNTER(_perf_class_link_time, SUN_CLS, "classLinkedTime"); |
875
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
970 NEWPERFTICKCOUNTER(_perf_class_link_selftime, SUN_CLS, "classLinkedTime.self"); |
0 | 971 NEWPERFEVENTCOUNTER(_perf_classes_inited, SUN_CLS, "initializedClasses"); |
972 NEWPERFEVENTCOUNTER(_perf_classes_linked, SUN_CLS, "linkedClasses"); | |
875
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
973 NEWPERFEVENTCOUNTER(_perf_classes_verified, SUN_CLS, "verifiedClasses"); |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
974 |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
975 NEWPERFTICKCOUNTER(_perf_class_parse_time, SUN_CLS, "parseClassTime"); |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
976 NEWPERFTICKCOUNTER(_perf_class_parse_selftime, SUN_CLS, "parseClassTime.self"); |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
977 NEWPERFTICKCOUNTER(_perf_sys_class_lookup_time, SUN_CLS, "lookupSysClassTime"); |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
978 NEWPERFTICKCOUNTER(_perf_shared_classload_time, SUN_CLS, "sharedClassLoadTime"); |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
979 NEWPERFTICKCOUNTER(_perf_sys_classload_time, SUN_CLS, "sysClassLoadTime"); |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
980 NEWPERFTICKCOUNTER(_perf_app_classload_time, SUN_CLS, "appClassLoadTime"); |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
981 NEWPERFTICKCOUNTER(_perf_app_classload_selftime, SUN_CLS, "appClassLoadTime.self"); |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
982 NEWPERFEVENTCOUNTER(_perf_app_classload_count, SUN_CLS, "appClassLoadCount"); |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
983 NEWPERFTICKCOUNTER(_perf_define_appclasses, SUN_CLS, "defineAppClasses"); |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
984 NEWPERFTICKCOUNTER(_perf_define_appclass_time, SUN_CLS, "defineAppClassTime"); |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
985 NEWPERFTICKCOUNTER(_perf_define_appclass_selftime, SUN_CLS, "defineAppClassTime.self"); |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
986 NEWPERFBYTECOUNTER(_perf_app_classfile_bytes_read, SUN_CLS, "appClassBytes"); |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
987 NEWPERFBYTECOUNTER(_perf_sys_classfile_bytes_read, SUN_CLS, "sysClassBytes"); |
6a93908f268f
6857194: Add hotspot perf counters to aid class loading performance measurement
mchung
parents:
723
diff
changeset
|
988 |
0 | 989 |
990 // The following performance counters are added for measuring the impact | |
991 // of the bug fix of 6365597. They are mainly focused on finding out | |
992 // the behavior of system & user-defined classloader lock, whether | |
993 // ClassLoader.loadClass/findClass is being called synchronized or not. | |
994 // Also two additional counters are created to see whether 'UnsyncloadClass' | |
995 // flag is being set or not and how many times load_instance_class call | |
996 // fails with linkageError etc. | |
997 NEWPERFEVENTCOUNTER(_sync_systemLoaderLockContentionRate, SUN_CLS, | |
998 "systemLoaderLockContentionRate"); | |
999 NEWPERFEVENTCOUNTER(_sync_nonSystemLoaderLockContentionRate, SUN_CLS, | |
1000 "nonSystemLoaderLockContentionRate"); | |
1001 NEWPERFEVENTCOUNTER(_sync_JVMFindLoadedClassLockFreeCounter, SUN_CLS, | |
1002 "jvmFindLoadedClassNoLockCalls"); | |
1003 NEWPERFEVENTCOUNTER(_sync_JVMDefineClassLockFreeCounter, SUN_CLS, | |
1004 "jvmDefineClassNoLockCalls"); | |
1005 | |
1006 NEWPERFEVENTCOUNTER(_sync_JNIDefineClassLockFreeCounter, SUN_CLS, | |
1007 "jniDefineClassNoLockCalls"); | |
1008 | |
1009 NEWPERFEVENTCOUNTER(_unsafe_defineClassCallCounter, SUN_CLS, | |
1010 "unsafeDefineClassCalls"); | |
1011 | |
1012 NEWPERFEVENTCOUNTER(_isUnsyncloadClass, SUN_CLS, "isUnsyncloadClassSet"); | |
1013 NEWPERFEVENTCOUNTER(_load_instance_class_failCounter, SUN_CLS, | |
1014 "loadInstanceClassFailRate"); | |
1015 | |
1016 // increment the isUnsyncloadClass counter if UnsyncloadClass is set. | |
1017 if (UnsyncloadClass) { | |
1018 _isUnsyncloadClass->inc(); | |
1019 } | |
1020 } | |
1021 | |
1022 // lookup zip library entry points | |
1023 load_zip_library(); | |
1024 // initialize search path | |
1025 setup_bootstrap_search_path(); | |
1026 if (LazyBootClassLoader) { | |
1027 // set up meta index which makes boot classpath initialization lazier | |
1028 setup_meta_index(); | |
1029 } | |
1030 } | |
1031 | |
1032 | |
1033 jlong ClassLoader::classloader_time_ms() { | |
1034 return UsePerfData ? | |
1035 Management::ticks_to_ms(_perf_accumulated_time->get_value()) : -1; | |
1036 } | |
1037 | |
1038 jlong ClassLoader::class_init_count() { | |
1039 return UsePerfData ? _perf_classes_inited->get_value() : -1; | |
1040 } | |
1041 | |
1042 jlong ClassLoader::class_init_time_ms() { | |
1043 return UsePerfData ? | |
1044 Management::ticks_to_ms(_perf_class_init_time->get_value()) : -1; | |
1045 } | |
1046 | |
1047 jlong ClassLoader::class_verify_time_ms() { | |
1048 return UsePerfData ? | |
1049 Management::ticks_to_ms(_perf_class_verify_time->get_value()) : -1; | |
1050 } | |
1051 | |
1052 jlong ClassLoader::class_link_count() { | |
1053 return UsePerfData ? _perf_classes_linked->get_value() : -1; | |
1054 } | |
1055 | |
1056 jlong ClassLoader::class_link_time_ms() { | |
1057 return UsePerfData ? | |
1058 Management::ticks_to_ms(_perf_class_link_time->get_value()) : -1; | |
1059 } | |
1060 | |
1061 int ClassLoader::compute_Object_vtable() { | |
1062 // hardwired for JDK1.2 -- would need to duplicate class file parsing | |
1063 // code to determine actual value from file | |
1064 // Would be value '11' if finals were in vtable | |
1065 int JDK_1_2_Object_vtable_size = 5; | |
1066 return JDK_1_2_Object_vtable_size * vtableEntry::size(); | |
1067 } | |
1068 | |
1069 | |
1070 void classLoader_init() { | |
1071 ClassLoader::initialize(); | |
1072 } | |
1073 | |
1074 | |
1075 bool ClassLoader::get_canonical_path(char* orig, char* out, int len) { | |
1076 assert(orig != NULL && out != NULL && len > 0, "bad arguments"); | |
1077 if (CanonicalizeEntry != NULL) { | |
1078 JNIEnv* env = JavaThread::current()->jni_environment(); | |
1079 if ((CanonicalizeEntry)(env, hpi::native_path(orig), out, len) < 0) { | |
1080 return false; | |
1081 } | |
1082 } else { | |
1083 // On JDK 1.2.2 the Canonicalize does not exist, so just do nothing | |
1084 strncpy(out, orig, len); | |
1085 out[len - 1] = '\0'; | |
1086 } | |
1087 return true; | |
1088 } | |
1089 | |
1090 #ifndef PRODUCT | |
1091 | |
1092 void ClassLoader::verify() { | |
1093 _package_hash_table->verify(); | |
1094 } | |
1095 | |
1096 | |
1097 // CompileTheWorld | |
1098 // | |
1099 // Iterates over all class path entries and forces compilation of all methods | |
1100 // in all classes found. Currently, only zip/jar archives are searched. | |
1101 // | |
1102 // The classes are loaded by the Java level bootstrap class loader, and the | |
1103 // initializer is called. If DelayCompilationDuringStartup is true (default), | |
1104 // the interpreter will run the initialization code. Note that forcing | |
1105 // initialization in this way could potentially lead to initialization order | |
1106 // problems, in which case we could just force the initialization bit to be set. | |
1107 | |
1108 | |
1109 // We need to iterate over the contents of a zip/jar file, so we replicate the | |
1110 // jzcell and jzfile definitions from zip_util.h but rename jzfile to real_jzfile, | |
1111 // since jzfile already has a void* definition. | |
1112 // | |
1113 // Note that this is only used in debug mode. | |
1114 // | |
1115 // HotSpot integration note: | |
1116 // Matches zip_util.h 1.14 99/06/01 from jdk1.3 beta H build | |
1117 | |
1118 | |
1119 // JDK 1.3 version | |
1120 typedef struct real_jzentry13 { /* Zip file entry */ | |
1121 char *name; /* entry name */ | |
1122 jint time; /* modification time */ | |
1123 jint size; /* size of uncompressed data */ | |
1124 jint csize; /* size of compressed data (zero if uncompressed) */ | |
1125 jint crc; /* crc of uncompressed data */ | |
1126 char *comment; /* optional zip file comment */ | |
1127 jbyte *extra; /* optional extra data */ | |
1128 jint pos; /* position of LOC header (if negative) or data */ | |
1129 } real_jzentry13; | |
1130 | |
1131 typedef struct real_jzfile13 { /* Zip file */ | |
1132 char *name; /* zip file name */ | |
1133 jint refs; /* number of active references */ | |
1134 jint fd; /* open file descriptor */ | |
1135 void *lock; /* read lock */ | |
1136 char *comment; /* zip file comment */ | |
1137 char *msg; /* zip error message */ | |
1138 void *entries; /* array of hash cells */ | |
1139 jint total; /* total number of entries */ | |
1140 unsigned short *table; /* Hash chain heads: indexes into entries */ | |
1141 jint tablelen; /* number of hash eads */ | |
1142 real_jzfile13 *next; /* next zip file in search list */ | |
1143 jzentry *cache; /* we cache the most recently freed jzentry */ | |
1144 /* Information on metadata names in META-INF directory */ | |
1145 char **metanames; /* array of meta names (may have null names) */ | |
1146 jint metacount; /* number of slots in metanames array */ | |
1147 /* If there are any per-entry comments, they are in the comments array */ | |
1148 char **comments; | |
1149 } real_jzfile13; | |
1150 | |
1151 // JDK 1.2 version | |
1152 typedef struct real_jzentry12 { /* Zip file entry */ | |
1153 char *name; /* entry name */ | |
1154 jint time; /* modification time */ | |
1155 jint size; /* size of uncompressed data */ | |
1156 jint csize; /* size of compressed data (zero if uncompressed) */ | |
1157 jint crc; /* crc of uncompressed data */ | |
1158 char *comment; /* optional zip file comment */ | |
1159 jbyte *extra; /* optional extra data */ | |
1160 jint pos; /* position of LOC header (if negative) or data */ | |
1161 struct real_jzentry12 *next; /* next entry in hash table */ | |
1162 } real_jzentry12; | |
1163 | |
1164 typedef struct real_jzfile12 { /* Zip file */ | |
1165 char *name; /* zip file name */ | |
1166 jint refs; /* number of active references */ | |
1167 jint fd; /* open file descriptor */ | |
1168 void *lock; /* read lock */ | |
1169 char *comment; /* zip file comment */ | |
1170 char *msg; /* zip error message */ | |
1171 real_jzentry12 *entries; /* array of zip entries */ | |
1172 jint total; /* total number of entries */ | |
1173 real_jzentry12 **table; /* hash table of entries */ | |
1174 jint tablelen; /* number of buckets */ | |
1175 jzfile *next; /* next zip file in search list */ | |
1176 } real_jzfile12; | |
1177 | |
1178 | |
1179 void ClassPathDirEntry::compile_the_world(Handle loader, TRAPS) { | |
1180 // For now we only compile all methods in all classes in zip/jar files | |
1181 tty->print_cr("CompileTheWorld : Skipped classes in %s", _dir); | |
1182 tty->cr(); | |
1183 } | |
1184 | |
1185 | |
1186 bool ClassPathDirEntry::is_rt_jar() { | |
1187 return false; | |
1188 } | |
1189 | |
1190 void ClassPathZipEntry::compile_the_world(Handle loader, TRAPS) { | |
1191 if (JDK_Version::is_jdk12x_version()) { | |
1192 compile_the_world12(loader, THREAD); | |
1193 } else { | |
1194 compile_the_world13(loader, THREAD); | |
1195 } | |
1196 if (HAS_PENDING_EXCEPTION) { | |
1197 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { | |
1198 CLEAR_PENDING_EXCEPTION; | |
1199 tty->print_cr("\nCompileTheWorld : Ran out of memory\n"); | |
1200 size_t used = Universe::heap()->permanent_used(); | |
1201 size_t capacity = Universe::heap()->permanent_capacity(); | |
1202 tty->print_cr("Permanent generation used %dK of %dK", used/K, capacity/K); | |
1203 tty->print_cr("Increase size by setting e.g. -XX:MaxPermSize=%dK\n", capacity*2/K); | |
1204 } else { | |
1205 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n"); | |
1206 } | |
1207 } | |
1208 } | |
1209 | |
1210 // Version that works for JDK 1.3.x | |
1211 void ClassPathZipEntry::compile_the_world13(Handle loader, TRAPS) { | |
1212 real_jzfile13* zip = (real_jzfile13*) _zip; | |
1213 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name); | |
1214 tty->cr(); | |
1215 // Iterate over all entries in zip file | |
1216 for (int n = 0; ; n++) { | |
1217 real_jzentry13 * ze = (real_jzentry13 *)((*GetNextEntry)(_zip, n)); | |
1218 if (ze == NULL) break; | |
1219 ClassLoader::compile_the_world_in(ze->name, loader, CHECK); | |
1220 } | |
1221 } | |
1222 | |
1223 | |
1224 // Version that works for JDK 1.2.x | |
1225 void ClassPathZipEntry::compile_the_world12(Handle loader, TRAPS) { | |
1226 real_jzfile12* zip = (real_jzfile12*) _zip; | |
1227 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name); | |
1228 tty->cr(); | |
1229 // Iterate over all entries in zip file | |
1230 for (int n = 0; ; n++) { | |
1231 real_jzentry12 * ze = (real_jzentry12 *)((*GetNextEntry)(_zip, n)); | |
1232 if (ze == NULL) break; | |
1233 ClassLoader::compile_the_world_in(ze->name, loader, CHECK); | |
1234 } | |
1235 } | |
1236 | |
1237 bool ClassPathZipEntry::is_rt_jar() { | |
1238 if (JDK_Version::is_jdk12x_version()) { | |
1239 return is_rt_jar12(); | |
1240 } else { | |
1241 return is_rt_jar13(); | |
1242 } | |
1243 } | |
1244 | |
1245 // JDK 1.3 version | |
1246 bool ClassPathZipEntry::is_rt_jar13() { | |
1247 real_jzfile13* zip = (real_jzfile13*) _zip; | |
1248 int len = (int)strlen(zip->name); | |
1249 // Check whether zip name ends in "rt.jar" | |
1250 // This will match other archives named rt.jar as well, but this is | |
1251 // only used for debugging. | |
1252 return (len >= 6) && (strcasecmp(zip->name + len - 6, "rt.jar") == 0); | |
1253 } | |
1254 | |
1255 // JDK 1.2 version | |
1256 bool ClassPathZipEntry::is_rt_jar12() { | |
1257 real_jzfile12* zip = (real_jzfile12*) _zip; | |
1258 int len = (int)strlen(zip->name); | |
1259 // Check whether zip name ends in "rt.jar" | |
1260 // This will match other archives named rt.jar as well, but this is | |
1261 // only used for debugging. | |
1262 return (len >= 6) && (strcasecmp(zip->name + len - 6, "rt.jar") == 0); | |
1263 } | |
1264 | |
1265 void LazyClassPathEntry::compile_the_world(Handle loader, TRAPS) { | |
1266 resolve_entry()->compile_the_world(loader, CHECK); | |
1267 } | |
1268 | |
1269 bool LazyClassPathEntry::is_rt_jar() { | |
1270 return resolve_entry()->is_rt_jar(); | |
1271 } | |
1272 | |
1273 void ClassLoader::compile_the_world() { | |
1274 EXCEPTION_MARK; | |
1275 HandleMark hm(THREAD); | |
1276 ResourceMark rm(THREAD); | |
1277 // Make sure we don't run with background compilation | |
1278 BackgroundCompilation = false; | |
1279 // Find bootstrap loader | |
1280 Handle system_class_loader (THREAD, SystemDictionary::java_system_loader()); | |
1281 // Iterate over all bootstrap class path entries | |
1282 ClassPathEntry* e = _first_entry; | |
1283 while (e != NULL) { | |
1284 // We stop at rt.jar, unless it is the first bootstrap path entry | |
1285 if (e->is_rt_jar() && e != _first_entry) break; | |
1286 e->compile_the_world(system_class_loader, CATCH); | |
1287 e = e->next(); | |
1288 } | |
1289 tty->print_cr("CompileTheWorld : Done"); | |
1290 { | |
1291 // Print statistics as if before normal exit: | |
1292 extern void print_statistics(); | |
1293 print_statistics(); | |
1294 } | |
1295 vm_exit(0); | |
1296 } | |
1297 | |
1298 int ClassLoader::_compile_the_world_counter = 0; | |
1188
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1142
diff
changeset
|
1299 static int _codecache_sweep_counter = 0; |
0 | 1300 |
1301 void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) { | |
1302 int len = (int)strlen(name); | |
1303 if (len > 6 && strcmp(".class", name + len - 6) == 0) { | |
1304 // We have a .class file | |
1305 char buffer[2048]; | |
1306 strncpy(buffer, name, len - 6); | |
1307 buffer[len-6] = 0; | |
1308 // If the file has a period after removing .class, it's not really a | |
1309 // valid class file. The class loader will check everything else. | |
1310 if (strchr(buffer, '.') == NULL) { | |
1311 _compile_the_world_counter++; | |
723 | 1312 if (_compile_the_world_counter > CompileTheWorldStopAt) return; |
1313 | |
1314 // Construct name without extension | |
1315 symbolHandle sym = oopFactory::new_symbol_handle(buffer, CHECK); | |
1316 // Use loader to load and initialize class | |
1317 klassOop ik = SystemDictionary::resolve_or_null(sym, loader, Handle(), THREAD); | |
1318 instanceKlassHandle k (THREAD, ik); | |
1319 if (k.not_null() && !HAS_PENDING_EXCEPTION) { | |
1320 k->initialize(THREAD); | |
1321 } | |
1322 bool exception_occurred = HAS_PENDING_EXCEPTION; | |
1323 CLEAR_PENDING_EXCEPTION; | |
1324 if (CompileTheWorldPreloadClasses && k.not_null()) { | |
1325 constantPoolKlass::preload_and_initialize_all_classes(k->constants(), THREAD); | |
1326 if (HAS_PENDING_EXCEPTION) { | |
1327 // If something went wrong in preloading we just ignore it | |
1328 CLEAR_PENDING_EXCEPTION; | |
1329 tty->print_cr("Preloading failed for (%d) %s", _compile_the_world_counter, buffer); | |
0 | 1330 } |
723 | 1331 } |
1332 | |
1333 if (_compile_the_world_counter >= CompileTheWorldStartAt) { | |
0 | 1334 if (k.is_null() || (exception_occurred && !CompileTheWorldIgnoreInitErrors)) { |
1335 // If something went wrong (e.g. ExceptionInInitializerError) we skip this class | |
1336 tty->print_cr("CompileTheWorld (%d) : Skipping %s", _compile_the_world_counter, buffer); | |
1337 } else { | |
1338 tty->print_cr("CompileTheWorld (%d) : %s", _compile_the_world_counter, buffer); | |
1339 // Preload all classes to get around uncommon traps | |
1340 // Iterate over all methods in class | |
1341 for (int n = 0; n < k->methods()->length(); n++) { | |
1342 methodHandle m (THREAD, methodOop(k->methods()->obj_at(n))); | |
1783 | 1343 if (CompilationPolicy::can_be_compiled(m)) { |
1188
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1142
diff
changeset
|
1344 |
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1142
diff
changeset
|
1345 if (++_codecache_sweep_counter == CompileTheWorldSafepointInterval) { |
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1142
diff
changeset
|
1346 // Give sweeper a chance to keep up with CTW |
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1142
diff
changeset
|
1347 VM_ForceSafepoint op; |
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1142
diff
changeset
|
1348 VMThread::execute(&op); |
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1142
diff
changeset
|
1349 _codecache_sweep_counter = 0; |
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1142
diff
changeset
|
1350 } |
0 | 1351 // Force compilation |
1783 | 1352 CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_initial_compile, |
0 | 1353 methodHandle(), 0, "CTW", THREAD); |
1354 if (HAS_PENDING_EXCEPTION) { | |
1355 CLEAR_PENDING_EXCEPTION; | |
1356 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_counter, m->name()->as_C_string()); | |
1357 } | |
723 | 1358 if (TieredCompilation) { |
1359 // Clobber the first compile and force second tier compilation | |
1360 nmethod* nm = m->code(); | |
1361 if (nm != NULL) { | |
1362 // Throw out the code so that the code cache doesn't fill up | |
1363 nm->make_not_entrant(); | |
1364 m->clear_code(); | |
1365 } | |
1783 | 1366 CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_full_optimization, |
723 | 1367 methodHandle(), 0, "CTW", THREAD); |
1368 if (HAS_PENDING_EXCEPTION) { | |
1369 CLEAR_PENDING_EXCEPTION; | |
1370 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_counter, m->name()->as_C_string()); | |
1371 } | |
0 | 1372 } |
1373 } | |
723 | 1374 |
1375 nmethod* nm = m->code(); | |
1376 if (nm != NULL) { | |
1377 // Throw out the code so that the code cache doesn't fill up | |
1378 nm->make_not_entrant(); | |
1379 m->clear_code(); | |
0 | 1380 } |
1381 } | |
1382 } | |
1383 } | |
1384 } | |
1385 } | |
1386 } | |
1387 | |
1388 #endif //PRODUCT |