Mercurial > hg > graal-jvmci-8
annotate src/share/vm/classfile/classLoader.cpp @ 6100:71afdabfd05b
7168280: Eliminate the generic signature index slot from field array for field without generic signature.
Summary: Only allocate the generic signature index slot in the field array for field with generic signature attribute.
Reviewed-by: coleenp, dlong
author | jiangli |
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date | Mon, 21 May 2012 14:10:35 -0400 |
parents | f08d439fab8c |
children | 04b9a2566eec d2a62e0f25eb |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2011, 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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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" | |
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44 #include "oops/symbol.hpp" |
1972 | 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/init.hpp" | |
52 #include "runtime/interfaceSupport.hpp" | |
53 #include "runtime/java.hpp" | |
54 #include "runtime/javaCalls.hpp" | |
55 #include "runtime/threadCritical.hpp" | |
56 #include "runtime/timer.hpp" | |
57 #include "services/management.hpp" | |
58 #include "services/threadService.hpp" | |
59 #include "utilities/events.hpp" | |
60 #include "utilities/hashtable.hpp" | |
61 #include "utilities/hashtable.inline.hpp" | |
62 #ifdef TARGET_OS_FAMILY_linux | |
63 # include "os_linux.inline.hpp" | |
64 #endif | |
65 #ifdef TARGET_OS_FAMILY_solaris | |
66 # include "os_solaris.inline.hpp" | |
67 #endif | |
68 #ifdef TARGET_OS_FAMILY_windows | |
69 # include "os_windows.inline.hpp" | |
70 #endif | |
3960 | 71 #ifdef TARGET_OS_FAMILY_bsd |
72 # include "os_bsd.inline.hpp" | |
73 #endif | |
0 | 74 |
75 | |
76 // Entry points in zip.dll for loading zip/jar file entries | |
77 | |
78 typedef void * * (JNICALL *ZipOpen_t)(const char *name, char **pmsg); | |
79 typedef void (JNICALL *ZipClose_t)(jzfile *zip); | |
80 typedef jzentry* (JNICALL *FindEntry_t)(jzfile *zip, const char *name, jint *sizeP, jint *nameLen); | |
81 typedef jboolean (JNICALL *ReadEntry_t)(jzfile *zip, jzentry *entry, unsigned char *buf, char *namebuf); | |
82 typedef jboolean (JNICALL *ReadMappedEntry_t)(jzfile *zip, jzentry *entry, unsigned char **buf, char *namebuf); | |
83 typedef jzentry* (JNICALL *GetNextEntry_t)(jzfile *zip, jint n); | |
84 | |
85 static ZipOpen_t ZipOpen = NULL; | |
86 static ZipClose_t ZipClose = NULL; | |
87 static FindEntry_t FindEntry = NULL; | |
88 static ReadEntry_t ReadEntry = NULL; | |
89 static ReadMappedEntry_t ReadMappedEntry = NULL; | |
90 static GetNextEntry_t GetNextEntry = NULL; | |
91 static canonicalize_fn_t CanonicalizeEntry = NULL; | |
92 | |
93 // Globals | |
94 | |
95 PerfCounter* ClassLoader::_perf_accumulated_time = NULL; | |
96 PerfCounter* ClassLoader::_perf_classes_inited = NULL; | |
97 PerfCounter* ClassLoader::_perf_class_init_time = NULL; | |
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98 PerfCounter* ClassLoader::_perf_class_init_selftime = NULL; |
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99 PerfCounter* ClassLoader::_perf_classes_verified = NULL; |
0 | 100 PerfCounter* ClassLoader::_perf_class_verify_time = NULL; |
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101 PerfCounter* ClassLoader::_perf_class_verify_selftime = NULL; |
0 | 102 PerfCounter* ClassLoader::_perf_classes_linked = NULL; |
103 PerfCounter* ClassLoader::_perf_class_link_time = NULL; | |
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104 PerfCounter* ClassLoader::_perf_class_link_selftime = NULL; |
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105 PerfCounter* ClassLoader::_perf_class_parse_time = NULL; |
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106 PerfCounter* ClassLoader::_perf_class_parse_selftime = NULL; |
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107 PerfCounter* ClassLoader::_perf_sys_class_lookup_time = NULL; |
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108 PerfCounter* ClassLoader::_perf_shared_classload_time = NULL; |
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109 PerfCounter* ClassLoader::_perf_sys_classload_time = NULL; |
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110 PerfCounter* ClassLoader::_perf_app_classload_time = NULL; |
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111 PerfCounter* ClassLoader::_perf_app_classload_selftime = NULL; |
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112 PerfCounter* ClassLoader::_perf_app_classload_count = NULL; |
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113 PerfCounter* ClassLoader::_perf_define_appclasses = NULL; |
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114 PerfCounter* ClassLoader::_perf_define_appclass_time = NULL; |
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115 PerfCounter* ClassLoader::_perf_define_appclass_selftime = NULL; |
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116 PerfCounter* ClassLoader::_perf_app_classfile_bytes_read = NULL; |
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117 PerfCounter* ClassLoader::_perf_sys_classfile_bytes_read = NULL; |
0 | 118 PerfCounter* ClassLoader::_sync_systemLoaderLockContentionRate = NULL; |
119 PerfCounter* ClassLoader::_sync_nonSystemLoaderLockContentionRate = NULL; | |
120 PerfCounter* ClassLoader::_sync_JVMFindLoadedClassLockFreeCounter = NULL; | |
121 PerfCounter* ClassLoader::_sync_JVMDefineClassLockFreeCounter = NULL; | |
122 PerfCounter* ClassLoader::_sync_JNIDefineClassLockFreeCounter = NULL; | |
123 PerfCounter* ClassLoader::_unsafe_defineClassCallCounter = NULL; | |
124 PerfCounter* ClassLoader::_isUnsyncloadClass = NULL; | |
125 PerfCounter* ClassLoader::_load_instance_class_failCounter = NULL; | |
126 | |
127 ClassPathEntry* ClassLoader::_first_entry = NULL; | |
128 ClassPathEntry* ClassLoader::_last_entry = NULL; | |
129 PackageHashtable* ClassLoader::_package_hash_table = NULL; | |
130 | |
131 // helper routines | |
132 bool string_starts_with(const char* str, const char* str_to_find) { | |
133 size_t str_len = strlen(str); | |
134 size_t str_to_find_len = strlen(str_to_find); | |
135 if (str_to_find_len > str_len) { | |
136 return false; | |
137 } | |
138 return (strncmp(str, str_to_find, str_to_find_len) == 0); | |
139 } | |
140 | |
141 bool string_ends_with(const char* str, const char* str_to_find) { | |
142 size_t str_len = strlen(str); | |
143 size_t str_to_find_len = strlen(str_to_find); | |
144 if (str_to_find_len > str_len) { | |
145 return false; | |
146 } | |
147 return (strncmp(str + (str_len - str_to_find_len), str_to_find, str_to_find_len) == 0); | |
148 } | |
149 | |
150 | |
151 MetaIndex::MetaIndex(char** meta_package_names, int num_meta_package_names) { | |
152 if (num_meta_package_names == 0) { | |
153 _meta_package_names = NULL; | |
154 _num_meta_package_names = 0; | |
155 } else { | |
156 _meta_package_names = NEW_C_HEAP_ARRAY(char*, num_meta_package_names); | |
157 _num_meta_package_names = num_meta_package_names; | |
158 memcpy(_meta_package_names, meta_package_names, num_meta_package_names * sizeof(char*)); | |
159 } | |
160 } | |
161 | |
162 | |
163 MetaIndex::~MetaIndex() { | |
164 FREE_C_HEAP_ARRAY(char*, _meta_package_names); | |
165 } | |
166 | |
167 | |
168 bool MetaIndex::may_contain(const char* class_name) { | |
169 if ( _num_meta_package_names == 0) { | |
170 return false; | |
171 } | |
172 size_t class_name_len = strlen(class_name); | |
173 for (int i = 0; i < _num_meta_package_names; i++) { | |
174 char* pkg = _meta_package_names[i]; | |
175 size_t pkg_len = strlen(pkg); | |
176 size_t min_len = MIN2(class_name_len, pkg_len); | |
177 if (!strncmp(class_name, pkg, min_len)) { | |
178 return true; | |
179 } | |
180 } | |
181 return false; | |
182 } | |
183 | |
184 | |
185 ClassPathEntry::ClassPathEntry() { | |
186 set_next(NULL); | |
187 } | |
188 | |
189 | |
190 bool ClassPathEntry::is_lazy() { | |
191 return false; | |
192 } | |
193 | |
194 ClassPathDirEntry::ClassPathDirEntry(char* dir) : ClassPathEntry() { | |
195 _dir = NEW_C_HEAP_ARRAY(char, strlen(dir)+1); | |
196 strcpy(_dir, dir); | |
197 } | |
198 | |
199 | |
200 ClassFileStream* ClassPathDirEntry::open_stream(const char* name) { | |
201 // construct full path name | |
202 char path[JVM_MAXPATHLEN]; | |
203 if (jio_snprintf(path, sizeof(path), "%s%s%s", _dir, os::file_separator(), name) == -1) { | |
204 return NULL; | |
205 } | |
206 // check if file exists | |
207 struct stat st; | |
208 if (os::stat(path, &st) == 0) { | |
209 // found file, open it | |
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210 int file_handle = os::open(path, 0, 0); |
0 | 211 if (file_handle != -1) { |
212 // read contents into resource array | |
213 u1* buffer = NEW_RESOURCE_ARRAY(u1, st.st_size); | |
214 size_t num_read = os::read(file_handle, (char*) buffer, st.st_size); | |
215 // close file | |
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216 os::close(file_handle); |
0 | 217 // construct ClassFileStream |
218 if (num_read == (size_t)st.st_size) { | |
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219 if (UsePerfData) { |
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220 ClassLoader::perf_sys_classfile_bytes_read()->inc(num_read); |
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221 } |
0 | 222 return new ClassFileStream(buffer, st.st_size, _dir); // Resource allocated |
223 } | |
224 } | |
225 } | |
226 return NULL; | |
227 } | |
228 | |
229 | |
230 ClassPathZipEntry::ClassPathZipEntry(jzfile* zip, const char* zip_name) : ClassPathEntry() { | |
231 _zip = zip; | |
232 _zip_name = NEW_C_HEAP_ARRAY(char, strlen(zip_name)+1); | |
233 strcpy(_zip_name, zip_name); | |
234 } | |
235 | |
236 ClassPathZipEntry::~ClassPathZipEntry() { | |
237 if (ZipClose != NULL) { | |
238 (*ZipClose)(_zip); | |
239 } | |
240 FREE_C_HEAP_ARRAY(char, _zip_name); | |
241 } | |
242 | |
243 ClassFileStream* ClassPathZipEntry::open_stream(const char* name) { | |
244 // enable call to C land | |
245 JavaThread* thread = JavaThread::current(); | |
246 ThreadToNativeFromVM ttn(thread); | |
247 // check whether zip archive contains name | |
248 jint filesize, name_len; | |
249 jzentry* entry = (*FindEntry)(_zip, name, &filesize, &name_len); | |
250 if (entry == NULL) return NULL; | |
251 u1* buffer; | |
252 char name_buf[128]; | |
253 char* filename; | |
254 if (name_len < 128) { | |
255 filename = name_buf; | |
256 } else { | |
257 filename = NEW_RESOURCE_ARRAY(char, name_len + 1); | |
258 } | |
259 | |
260 // file found, get pointer to class in mmaped jar file. | |
261 if (ReadMappedEntry == NULL || | |
262 !(*ReadMappedEntry)(_zip, entry, &buffer, filename)) { | |
263 // mmaped access not available, perhaps due to compression, | |
264 // read contents into resource array | |
265 buffer = NEW_RESOURCE_ARRAY(u1, filesize); | |
266 if (!(*ReadEntry)(_zip, entry, buffer, filename)) return NULL; | |
267 } | |
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268 if (UsePerfData) { |
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269 ClassLoader::perf_sys_classfile_bytes_read()->inc(filesize); |
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270 } |
0 | 271 // return result |
272 return new ClassFileStream(buffer, filesize, _zip_name); // Resource allocated | |
273 } | |
274 | |
275 // invoke function for each entry in the zip file | |
276 void ClassPathZipEntry::contents_do(void f(const char* name, void* context), void* context) { | |
277 JavaThread* thread = JavaThread::current(); | |
278 HandleMark handle_mark(thread); | |
279 ThreadToNativeFromVM ttn(thread); | |
280 for (int n = 0; ; n++) { | |
281 jzentry * ze = ((*GetNextEntry)(_zip, n)); | |
282 if (ze == NULL) break; | |
283 (*f)(ze->name, context); | |
284 } | |
285 } | |
286 | |
287 LazyClassPathEntry::LazyClassPathEntry(char* path, struct stat st) : ClassPathEntry() { | |
288 _path = strdup(path); | |
289 _st = st; | |
290 _meta_index = NULL; | |
291 _resolved_entry = NULL; | |
292 } | |
293 | |
294 bool LazyClassPathEntry::is_jar_file() { | |
295 return ((_st.st_mode & S_IFREG) == S_IFREG); | |
296 } | |
297 | |
298 ClassPathEntry* LazyClassPathEntry::resolve_entry() { | |
299 if (_resolved_entry != NULL) { | |
300 return (ClassPathEntry*) _resolved_entry; | |
301 } | |
302 ClassPathEntry* new_entry = NULL; | |
303 ClassLoader::create_class_path_entry(_path, _st, &new_entry, false); | |
304 assert(new_entry != NULL, "earlier code should have caught this"); | |
305 { | |
306 ThreadCritical tc; | |
307 if (_resolved_entry == NULL) { | |
308 _resolved_entry = new_entry; | |
309 return new_entry; | |
310 } | |
311 } | |
312 assert(_resolved_entry != NULL, "bug in MT-safe resolution logic"); | |
313 delete new_entry; | |
314 return (ClassPathEntry*) _resolved_entry; | |
315 } | |
316 | |
317 ClassFileStream* LazyClassPathEntry::open_stream(const char* name) { | |
318 if (_meta_index != NULL && | |
319 !_meta_index->may_contain(name)) { | |
320 return NULL; | |
321 } | |
322 return resolve_entry()->open_stream(name); | |
323 } | |
324 | |
325 bool LazyClassPathEntry::is_lazy() { | |
326 return true; | |
327 } | |
328 | |
329 static void print_meta_index(LazyClassPathEntry* entry, | |
330 GrowableArray<char*>& meta_packages) { | |
331 tty->print("[Meta index for %s=", entry->name()); | |
332 for (int i = 0; i < meta_packages.length(); i++) { | |
333 if (i > 0) tty->print(" "); | |
334 tty->print(meta_packages.at(i)); | |
335 } | |
336 tty->print_cr("]"); | |
337 } | |
338 | |
339 | |
340 void ClassLoader::setup_meta_index() { | |
341 // Set up meta index which allows us to open boot jars lazily if | |
342 // class data sharing is enabled | |
343 const char* known_version = "% VERSION 2"; | |
344 char* meta_index_path = Arguments::get_meta_index_path(); | |
345 char* meta_index_dir = Arguments::get_meta_index_dir(); | |
346 FILE* file = fopen(meta_index_path, "r"); | |
347 int line_no = 0; | |
348 if (file != NULL) { | |
349 ResourceMark rm; | |
350 LazyClassPathEntry* cur_entry = NULL; | |
351 GrowableArray<char*> boot_class_path_packages(10); | |
352 char package_name[256]; | |
353 bool skipCurrentJar = false; | |
354 while (fgets(package_name, sizeof(package_name), file) != NULL) { | |
355 ++line_no; | |
356 // Remove trailing newline | |
357 package_name[strlen(package_name) - 1] = '\0'; | |
358 switch(package_name[0]) { | |
359 case '%': | |
360 { | |
361 if ((line_no == 1) && (strcmp(package_name, known_version) != 0)) { | |
362 if (TraceClassLoading && Verbose) { | |
363 tty->print("[Unsupported meta index version]"); | |
364 } | |
365 fclose(file); | |
366 return; | |
367 } | |
368 } | |
369 | |
370 // These directives indicate jar files which contain only | |
371 // classes, only non-classfile resources, or a combination of | |
372 // the two. See src/share/classes/sun/misc/MetaIndex.java and | |
373 // make/tools/MetaIndex/BuildMetaIndex.java in the J2SE | |
374 // workspace. | |
375 case '#': | |
376 case '!': | |
377 case '@': | |
378 { | |
379 // Hand off current packages to current lazy entry (if any) | |
380 if ((cur_entry != NULL) && | |
381 (boot_class_path_packages.length() > 0)) { | |
382 if (TraceClassLoading && Verbose) { | |
383 print_meta_index(cur_entry, boot_class_path_packages); | |
384 } | |
385 MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0), | |
386 boot_class_path_packages.length()); | |
387 cur_entry->set_meta_index(index); | |
388 } | |
389 cur_entry = NULL; | |
390 boot_class_path_packages.clear(); | |
391 | |
392 // Find lazy entry corresponding to this jar file | |
393 for (ClassPathEntry* entry = _first_entry; entry != NULL; entry = entry->next()) { | |
394 if (entry->is_lazy() && | |
395 string_starts_with(entry->name(), meta_index_dir) && | |
396 string_ends_with(entry->name(), &package_name[2])) { | |
397 cur_entry = (LazyClassPathEntry*) entry; | |
398 break; | |
399 } | |
400 } | |
401 | |
402 // If the first character is '@', it indicates the following jar | |
403 // file is a resource only jar file in which case, we should skip | |
404 // reading the subsequent entries since the resource loading is | |
405 // totally handled by J2SE side. | |
406 if (package_name[0] == '@') { | |
407 if (cur_entry != NULL) { | |
408 cur_entry->set_meta_index(new MetaIndex(NULL, 0)); | |
409 } | |
410 cur_entry = NULL; | |
411 skipCurrentJar = true; | |
412 } else { | |
413 skipCurrentJar = false; | |
414 } | |
415 | |
416 break; | |
417 } | |
418 | |
419 default: | |
420 { | |
421 if (!skipCurrentJar && cur_entry != NULL) { | |
422 char* new_name = strdup(package_name); | |
423 boot_class_path_packages.append(new_name); | |
424 } | |
425 } | |
426 } | |
427 } | |
428 // Hand off current packages to current lazy entry (if any) | |
429 if ((cur_entry != NULL) && | |
430 (boot_class_path_packages.length() > 0)) { | |
431 if (TraceClassLoading && Verbose) { | |
432 print_meta_index(cur_entry, boot_class_path_packages); | |
433 } | |
434 MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0), | |
435 boot_class_path_packages.length()); | |
436 cur_entry->set_meta_index(index); | |
437 } | |
438 fclose(file); | |
439 } | |
440 } | |
441 | |
442 void ClassLoader::setup_bootstrap_search_path() { | |
443 assert(_first_entry == NULL, "should not setup bootstrap class search path twice"); | |
444 char* sys_class_path = os::strdup(Arguments::get_sysclasspath()); | |
445 if (TraceClassLoading && Verbose) { | |
446 tty->print_cr("[Bootstrap loader class path=%s]", sys_class_path); | |
447 } | |
448 | |
449 int len = (int)strlen(sys_class_path); | |
450 int end = 0; | |
451 | |
452 // Iterate over class path entries | |
453 for (int start = 0; start < len; start = end) { | |
454 while (sys_class_path[end] && sys_class_path[end] != os::path_separator()[0]) { | |
455 end++; | |
456 } | |
457 char* path = NEW_C_HEAP_ARRAY(char, end-start+1); | |
458 strncpy(path, &sys_class_path[start], end-start); | |
459 path[end-start] = '\0'; | |
460 update_class_path_entry_list(path, false); | |
461 FREE_C_HEAP_ARRAY(char, path); | |
462 while (sys_class_path[end] == os::path_separator()[0]) { | |
463 end++; | |
464 } | |
465 } | |
466 } | |
467 | |
468 void ClassLoader::create_class_path_entry(char *path, struct stat st, ClassPathEntry **new_entry, bool lazy) { | |
469 JavaThread* thread = JavaThread::current(); | |
470 if (lazy) { | |
471 *new_entry = new LazyClassPathEntry(path, st); | |
472 return; | |
473 } | |
474 if ((st.st_mode & S_IFREG) == S_IFREG) { | |
475 // Regular file, should be a zip file | |
476 // Canonicalized filename | |
477 char canonical_path[JVM_MAXPATHLEN]; | |
478 if (!get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) { | |
479 // This matches the classic VM | |
480 EXCEPTION_MARK; | |
481 THROW_MSG(vmSymbols::java_io_IOException(), "Bad pathname"); | |
482 } | |
483 char* error_msg = NULL; | |
484 jzfile* zip; | |
485 { | |
486 // enable call to C land | |
487 ThreadToNativeFromVM ttn(thread); | |
488 HandleMark hm(thread); | |
489 zip = (*ZipOpen)(canonical_path, &error_msg); | |
490 } | |
491 if (zip != NULL && error_msg == NULL) { | |
492 *new_entry = new ClassPathZipEntry(zip, path); | |
493 if (TraceClassLoading) { | |
494 tty->print_cr("[Opened %s]", path); | |
495 } | |
496 } else { | |
497 ResourceMark rm(thread); | |
498 char *msg; | |
499 if (error_msg == NULL) { | |
500 msg = NEW_RESOURCE_ARRAY(char, strlen(path) + 128); ; | |
501 jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path); | |
502 } else { | |
503 int len = (int)(strlen(path) + strlen(error_msg) + 128); | |
504 msg = NEW_RESOURCE_ARRAY(char, len); ; | |
505 jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path); | |
506 } | |
507 EXCEPTION_MARK; | |
508 THROW_MSG(vmSymbols::java_lang_ClassNotFoundException(), msg); | |
509 } | |
510 } else { | |
511 // Directory | |
512 *new_entry = new ClassPathDirEntry(path); | |
513 if (TraceClassLoading) { | |
514 tty->print_cr("[Path %s]", path); | |
515 } | |
516 } | |
517 } | |
518 | |
519 | |
520 // Create a class path zip entry for a given path (return NULL if not found | |
521 // or zip/JAR file cannot be opened) | |
522 ClassPathZipEntry* ClassLoader::create_class_path_zip_entry(const char *path) { | |
523 // check for a regular file | |
524 struct stat st; | |
525 if (os::stat(path, &st) == 0) { | |
526 if ((st.st_mode & S_IFREG) == S_IFREG) { | |
527 char orig_path[JVM_MAXPATHLEN]; | |
528 char canonical_path[JVM_MAXPATHLEN]; | |
529 | |
530 strcpy(orig_path, path); | |
531 if (get_canonical_path(orig_path, canonical_path, JVM_MAXPATHLEN)) { | |
532 char* error_msg = NULL; | |
533 jzfile* zip; | |
534 { | |
535 // enable call to C land | |
536 JavaThread* thread = JavaThread::current(); | |
537 ThreadToNativeFromVM ttn(thread); | |
538 HandleMark hm(thread); | |
539 zip = (*ZipOpen)(canonical_path, &error_msg); | |
540 } | |
541 if (zip != NULL && error_msg == NULL) { | |
542 // create using canonical path | |
543 return new ClassPathZipEntry(zip, canonical_path); | |
544 } | |
545 } | |
546 } | |
547 } | |
548 return NULL; | |
549 } | |
550 | |
551 // returns true if entry already on class path | |
552 bool ClassLoader::contains_entry(ClassPathEntry *entry) { | |
553 ClassPathEntry* e = _first_entry; | |
554 while (e != NULL) { | |
555 // assume zip entries have been canonicalized | |
556 if (strcmp(entry->name(), e->name()) == 0) { | |
557 return true; | |
558 } | |
559 e = e->next(); | |
560 } | |
561 return false; | |
562 } | |
563 | |
564 void ClassLoader::add_to_list(ClassPathEntry *new_entry) { | |
565 if (new_entry != NULL) { | |
566 if (_last_entry == NULL) { | |
567 _first_entry = _last_entry = new_entry; | |
568 } else { | |
569 _last_entry->set_next(new_entry); | |
570 _last_entry = new_entry; | |
571 } | |
572 } | |
573 } | |
574 | |
575 void ClassLoader::update_class_path_entry_list(const char *path, | |
576 bool check_for_duplicates) { | |
577 struct stat st; | |
578 if (os::stat((char *)path, &st) == 0) { | |
579 // File or directory found | |
580 ClassPathEntry* new_entry = NULL; | |
581 create_class_path_entry((char *)path, st, &new_entry, LazyBootClassLoader); | |
582 // The kernel VM adds dynamically to the end of the classloader path and | |
583 // doesn't reorder the bootclasspath which would break java.lang.Package | |
584 // (see PackageInfo). | |
585 // Add new entry to linked list | |
586 if (!check_for_duplicates || !contains_entry(new_entry)) { | |
587 add_to_list(new_entry); | |
588 } | |
589 } | |
590 } | |
591 | |
592 void ClassLoader::print_bootclasspath() { | |
593 ClassPathEntry* e = _first_entry; | |
594 tty->print("[bootclasspath= "); | |
595 while (e != NULL) { | |
596 tty->print("%s ;", e->name()); | |
597 e = e->next(); | |
598 } | |
599 tty->print_cr("]"); | |
600 } | |
601 | |
602 void ClassLoader::load_zip_library() { | |
603 assert(ZipOpen == NULL, "should not load zip library twice"); | |
604 // First make sure native library is loaded | |
605 os::native_java_library(); | |
606 // Load zip library | |
607 char path[JVM_MAXPATHLEN]; | |
608 char ebuf[1024]; | |
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609 os::dll_build_name(path, sizeof(path), Arguments::get_dll_dir(), "zip"); |
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610 void* handle = os::dll_load(path, ebuf, sizeof ebuf); |
0 | 611 if (handle == NULL) { |
612 vm_exit_during_initialization("Unable to load ZIP library", path); | |
613 } | |
614 // Lookup zip entry points | |
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615 ZipOpen = CAST_TO_FN_PTR(ZipOpen_t, os::dll_lookup(handle, "ZIP_Open")); |
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616 ZipClose = CAST_TO_FN_PTR(ZipClose_t, os::dll_lookup(handle, "ZIP_Close")); |
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617 FindEntry = CAST_TO_FN_PTR(FindEntry_t, os::dll_lookup(handle, "ZIP_FindEntry")); |
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618 ReadEntry = CAST_TO_FN_PTR(ReadEntry_t, os::dll_lookup(handle, "ZIP_ReadEntry")); |
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619 ReadMappedEntry = CAST_TO_FN_PTR(ReadMappedEntry_t, os::dll_lookup(handle, "ZIP_ReadMappedEntry")); |
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620 GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, os::dll_lookup(handle, "ZIP_GetNextEntry")); |
0 | 621 |
622 // ZIP_Close is not exported on Windows in JDK5.0 so don't abort if ZIP_Close is NULL | |
623 if (ZipOpen == NULL || FindEntry == NULL || ReadEntry == NULL || GetNextEntry == NULL) { | |
624 vm_exit_during_initialization("Corrupted ZIP library", path); | |
625 } | |
626 | |
627 // Lookup canonicalize entry in libjava.dll | |
628 void *javalib_handle = os::native_java_library(); | |
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629 CanonicalizeEntry = CAST_TO_FN_PTR(canonicalize_fn_t, os::dll_lookup(javalib_handle, "Canonicalize")); |
0 | 630 // This lookup only works on 1.3. Do not check for non-null here |
631 } | |
632 | |
633 // PackageInfo data exists in order to support the java.lang.Package | |
634 // class. A Package object provides information about a java package | |
635 // (version, vendor, etc.) which originates in the manifest of the jar | |
636 // file supplying the package. For application classes, the ClassLoader | |
637 // object takes care of this. | |
638 | |
639 // For system (boot) classes, the Java code in the Package class needs | |
640 // to be able to identify which source jar file contained the boot | |
641 // class, so that it can extract the manifest from it. This table | |
642 // identifies java packages with jar files in the boot classpath. | |
643 | |
644 // Because the boot classpath cannot change, the classpath index is | |
645 // sufficient to identify the source jar file or directory. (Since | |
646 // directories have no manifests, the directory name is not required, | |
647 // but is available.) | |
648 | |
649 // When using sharing -- the pathnames of entries in the boot classpath | |
650 // may not be the same at runtime as they were when the archive was | |
651 // created (NFS, Samba, etc.). The actual files and directories named | |
652 // in the classpath must be the same files, in the same order, even | |
653 // though the exact name is not the same. | |
654 | |
655 class PackageInfo: public BasicHashtableEntry { | |
656 public: | |
657 const char* _pkgname; // Package name | |
658 int _classpath_index; // Index of directory or JAR file loaded from | |
659 | |
660 PackageInfo* next() { | |
661 return (PackageInfo*)BasicHashtableEntry::next(); | |
662 } | |
663 | |
664 const char* pkgname() { return _pkgname; } | |
665 void set_pkgname(char* pkgname) { _pkgname = pkgname; } | |
666 | |
667 const char* filename() { | |
668 return ClassLoader::classpath_entry(_classpath_index)->name(); | |
669 } | |
670 | |
671 void set_index(int index) { | |
672 _classpath_index = index; | |
673 } | |
674 }; | |
675 | |
676 | |
677 class PackageHashtable : public BasicHashtable { | |
678 private: | |
679 inline unsigned int compute_hash(const char *s, int n) { | |
680 unsigned int val = 0; | |
681 while (--n >= 0) { | |
682 val = *s++ + 31 * val; | |
683 } | |
684 return val; | |
685 } | |
686 | |
687 PackageInfo* bucket(int index) { | |
688 return (PackageInfo*)BasicHashtable::bucket(index); | |
689 } | |
690 | |
691 PackageInfo* get_entry(int index, unsigned int hash, | |
692 const char* pkgname, size_t n) { | |
693 for (PackageInfo* pp = bucket(index); pp != NULL; pp = pp->next()) { | |
694 if (pp->hash() == hash && | |
695 strncmp(pkgname, pp->pkgname(), n) == 0 && | |
696 pp->pkgname()[n] == '\0') { | |
697 return pp; | |
698 } | |
699 } | |
700 return NULL; | |
701 } | |
702 | |
703 public: | |
704 PackageHashtable(int table_size) | |
705 : BasicHashtable(table_size, sizeof(PackageInfo)) {} | |
706 | |
707 PackageHashtable(int table_size, HashtableBucket* t, int number_of_entries) | |
708 : BasicHashtable(table_size, sizeof(PackageInfo), t, number_of_entries) {} | |
709 | |
710 PackageInfo* get_entry(const char* pkgname, int n) { | |
711 unsigned int hash = compute_hash(pkgname, n); | |
712 return get_entry(hash_to_index(hash), hash, pkgname, n); | |
713 } | |
714 | |
715 PackageInfo* new_entry(char* pkgname, int n) { | |
716 unsigned int hash = compute_hash(pkgname, n); | |
717 PackageInfo* pp; | |
718 pp = (PackageInfo*)BasicHashtable::new_entry(hash); | |
719 pp->set_pkgname(pkgname); | |
720 return pp; | |
721 } | |
722 | |
723 void add_entry(PackageInfo* pp) { | |
724 int index = hash_to_index(pp->hash()); | |
725 BasicHashtable::add_entry(index, pp); | |
726 } | |
727 | |
728 void copy_pkgnames(const char** packages) { | |
729 int n = 0; | |
730 for (int i = 0; i < table_size(); ++i) { | |
731 for (PackageInfo* pp = bucket(i); pp != NULL; pp = pp->next()) { | |
732 packages[n++] = pp->pkgname(); | |
733 } | |
734 } | |
735 assert(n == number_of_entries(), "just checking"); | |
736 } | |
737 | |
738 void copy_table(char** top, char* end, PackageHashtable* table); | |
739 }; | |
740 | |
741 | |
742 void PackageHashtable::copy_table(char** top, char* end, | |
743 PackageHashtable* table) { | |
744 // Copy (relocate) the table to the shared space. | |
745 BasicHashtable::copy_table(top, end); | |
746 | |
747 // Calculate the space needed for the package name strings. | |
748 int i; | |
749 int n = 0; | |
750 for (i = 0; i < table_size(); ++i) { | |
751 for (PackageInfo* pp = table->bucket(i); | |
752 pp != NULL; | |
753 pp = pp->next()) { | |
754 n += (int)(strlen(pp->pkgname()) + 1); | |
755 } | |
756 } | |
757 if (*top + n + sizeof(intptr_t) >= end) { | |
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758 report_out_of_shared_space(SharedMiscData); |
0 | 759 } |
760 | |
761 // Copy the table data (the strings) to the shared space. | |
762 n = align_size_up(n, sizeof(HeapWord)); | |
763 *(intptr_t*)(*top) = n; | |
764 *top += sizeof(intptr_t); | |
765 | |
766 for (i = 0; i < table_size(); ++i) { | |
767 for (PackageInfo* pp = table->bucket(i); | |
768 pp != NULL; | |
769 pp = pp->next()) { | |
770 int n1 = (int)(strlen(pp->pkgname()) + 1); | |
771 pp->set_pkgname((char*)memcpy(*top, pp->pkgname(), n1)); | |
772 *top += n1; | |
773 } | |
774 } | |
775 *top = (char*)align_size_up((intptr_t)*top, sizeof(HeapWord)); | |
776 } | |
777 | |
778 | |
779 void ClassLoader::copy_package_info_buckets(char** top, char* end) { | |
780 _package_hash_table->copy_buckets(top, end); | |
781 } | |
782 | |
783 void ClassLoader::copy_package_info_table(char** top, char* end) { | |
784 _package_hash_table->copy_table(top, end, _package_hash_table); | |
785 } | |
786 | |
787 | |
788 PackageInfo* ClassLoader::lookup_package(const char *pkgname) { | |
789 const char *cp = strrchr(pkgname, '/'); | |
790 if (cp != NULL) { | |
791 // Package prefix found | |
792 int n = cp - pkgname + 1; | |
793 return _package_hash_table->get_entry(pkgname, n); | |
794 } | |
795 return NULL; | |
796 } | |
797 | |
798 | |
799 bool ClassLoader::add_package(const char *pkgname, int classpath_index, TRAPS) { | |
800 assert(pkgname != NULL, "just checking"); | |
801 // Bootstrap loader no longer holds system loader lock obj serializing | |
802 // load_instance_class and thereby add_package | |
803 { | |
804 MutexLocker ml(PackageTable_lock, THREAD); | |
805 // First check for previously loaded entry | |
806 PackageInfo* pp = lookup_package(pkgname); | |
807 if (pp != NULL) { | |
808 // Existing entry found, check source of package | |
809 pp->set_index(classpath_index); | |
810 return true; | |
811 } | |
812 | |
813 const char *cp = strrchr(pkgname, '/'); | |
814 if (cp != NULL) { | |
815 // Package prefix found | |
816 int n = cp - pkgname + 1; | |
817 | |
818 char* new_pkgname = NEW_C_HEAP_ARRAY(char, n + 1); | |
819 if (new_pkgname == NULL) { | |
820 return false; | |
821 } | |
822 | |
823 memcpy(new_pkgname, pkgname, n); | |
824 new_pkgname[n] = '\0'; | |
825 pp = _package_hash_table->new_entry(new_pkgname, n); | |
826 pp->set_index(classpath_index); | |
827 | |
828 // Insert into hash table | |
829 _package_hash_table->add_entry(pp); | |
830 } | |
831 return true; | |
832 } | |
833 } | |
834 | |
835 | |
836 oop ClassLoader::get_system_package(const char* name, TRAPS) { | |
837 PackageInfo* pp; | |
838 { | |
839 MutexLocker ml(PackageTable_lock, THREAD); | |
840 pp = lookup_package(name); | |
841 } | |
842 if (pp == NULL) { | |
843 return NULL; | |
844 } else { | |
845 Handle p = java_lang_String::create_from_str(pp->filename(), THREAD); | |
846 return p(); | |
847 } | |
848 } | |
849 | |
850 | |
851 objArrayOop ClassLoader::get_system_packages(TRAPS) { | |
852 ResourceMark rm(THREAD); | |
853 int nof_entries; | |
854 const char** packages; | |
855 { | |
856 MutexLocker ml(PackageTable_lock, THREAD); | |
857 // Allocate resource char* array containing package names | |
858 nof_entries = _package_hash_table->number_of_entries(); | |
859 if ((packages = NEW_RESOURCE_ARRAY(const char*, nof_entries)) == NULL) { | |
860 return NULL; | |
861 } | |
862 _package_hash_table->copy_pkgnames(packages); | |
863 } | |
864 // Allocate objArray and fill with java.lang.String | |
1142 | 865 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), |
0 | 866 nof_entries, CHECK_0); |
867 objArrayHandle result(THREAD, r); | |
868 for (int i = 0; i < nof_entries; i++) { | |
869 Handle str = java_lang_String::create_from_str(packages[i], CHECK_0); | |
870 result->obj_at_put(i, str()); | |
871 } | |
872 | |
873 return result(); | |
874 } | |
875 | |
876 | |
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877 instanceKlassHandle ClassLoader::load_classfile(Symbol* h_name, TRAPS) { |
0 | 878 ResourceMark rm(THREAD); |
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879 EventMark m("loading class " INTPTR_FORMAT, (address)h_name); |
0 | 880 ThreadProfilerMark tpm(ThreadProfilerMark::classLoaderRegion); |
881 | |
882 stringStream st; | |
883 // st.print() uses too much stack space while handling a StackOverflowError | |
884 // st.print("%s.class", h_name->as_utf8()); | |
885 st.print_raw(h_name->as_utf8()); | |
886 st.print_raw(".class"); | |
887 char* name = st.as_string(); | |
888 | |
889 // Lookup stream for parsing .class file | |
890 ClassFileStream* stream = NULL; | |
891 int classpath_index = 0; | |
892 { | |
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893 PerfClassTraceTime vmtimer(perf_sys_class_lookup_time(), |
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894 ((JavaThread*) THREAD)->get_thread_stat()->perf_timers_addr(), |
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895 PerfClassTraceTime::CLASS_LOAD); |
0 | 896 ClassPathEntry* e = _first_entry; |
897 while (e != NULL) { | |
898 stream = e->open_stream(name); | |
899 if (stream != NULL) { | |
900 break; | |
901 } | |
902 e = e->next(); | |
903 ++classpath_index; | |
904 } | |
905 } | |
906 | |
907 instanceKlassHandle h(THREAD, klassOop(NULL)); | |
908 if (stream != NULL) { | |
909 | |
910 // class file found, parse it | |
911 ClassFileParser parser(stream); | |
912 Handle class_loader; | |
913 Handle protection_domain; | |
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914 TempNewSymbol parsed_name = NULL; |
0 | 915 instanceKlassHandle result = parser.parseClassFile(h_name, |
916 class_loader, | |
917 protection_domain, | |
918 parsed_name, | |
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919 false, |
0 | 920 CHECK_(h)); |
921 | |
922 // add to package table | |
923 if (add_package(name, classpath_index, THREAD)) { | |
924 h = result; | |
925 } | |
926 } | |
927 | |
928 return h; | |
929 } | |
930 | |
931 | |
932 void ClassLoader::create_package_info_table(HashtableBucket *t, int length, | |
933 int number_of_entries) { | |
934 assert(_package_hash_table == NULL, "One package info table allowed."); | |
935 assert(length == package_hash_table_size * sizeof(HashtableBucket), | |
936 "bad shared package info size."); | |
937 _package_hash_table = new PackageHashtable(package_hash_table_size, t, | |
938 number_of_entries); | |
939 } | |
940 | |
941 | |
942 void ClassLoader::create_package_info_table() { | |
943 assert(_package_hash_table == NULL, "shouldn't have one yet"); | |
944 _package_hash_table = new PackageHashtable(package_hash_table_size); | |
945 } | |
946 | |
947 | |
948 // Initialize the class loader's access to methods in libzip. Parse and | |
949 // process the boot classpath into a list ClassPathEntry objects. Once | |
950 // this list has been created, it must not change order (see class PackageInfo) | |
951 // it can be appended to and is by jvmti and the kernel vm. | |
952 | |
953 void ClassLoader::initialize() { | |
954 assert(_package_hash_table == NULL, "should have been initialized by now."); | |
955 EXCEPTION_MARK; | |
956 | |
957 if (UsePerfData) { | |
958 // jvmstat performance counters | |
959 NEWPERFTICKCOUNTER(_perf_accumulated_time, SUN_CLS, "time"); | |
960 NEWPERFTICKCOUNTER(_perf_class_init_time, SUN_CLS, "classInitTime"); | |
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961 NEWPERFTICKCOUNTER(_perf_class_init_selftime, SUN_CLS, "classInitTime.self"); |
0 | 962 NEWPERFTICKCOUNTER(_perf_class_verify_time, SUN_CLS, "classVerifyTime"); |
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963 NEWPERFTICKCOUNTER(_perf_class_verify_selftime, SUN_CLS, "classVerifyTime.self"); |
0 | 964 NEWPERFTICKCOUNTER(_perf_class_link_time, SUN_CLS, "classLinkedTime"); |
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965 NEWPERFTICKCOUNTER(_perf_class_link_selftime, SUN_CLS, "classLinkedTime.self"); |
0 | 966 NEWPERFEVENTCOUNTER(_perf_classes_inited, SUN_CLS, "initializedClasses"); |
967 NEWPERFEVENTCOUNTER(_perf_classes_linked, SUN_CLS, "linkedClasses"); | |
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968 NEWPERFEVENTCOUNTER(_perf_classes_verified, SUN_CLS, "verifiedClasses"); |
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969 |
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970 NEWPERFTICKCOUNTER(_perf_class_parse_time, SUN_CLS, "parseClassTime"); |
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971 NEWPERFTICKCOUNTER(_perf_class_parse_selftime, SUN_CLS, "parseClassTime.self"); |
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972 NEWPERFTICKCOUNTER(_perf_sys_class_lookup_time, SUN_CLS, "lookupSysClassTime"); |
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973 NEWPERFTICKCOUNTER(_perf_shared_classload_time, SUN_CLS, "sharedClassLoadTime"); |
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974 NEWPERFTICKCOUNTER(_perf_sys_classload_time, SUN_CLS, "sysClassLoadTime"); |
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975 NEWPERFTICKCOUNTER(_perf_app_classload_time, SUN_CLS, "appClassLoadTime"); |
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976 NEWPERFTICKCOUNTER(_perf_app_classload_selftime, SUN_CLS, "appClassLoadTime.self"); |
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977 NEWPERFEVENTCOUNTER(_perf_app_classload_count, SUN_CLS, "appClassLoadCount"); |
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978 NEWPERFTICKCOUNTER(_perf_define_appclasses, SUN_CLS, "defineAppClasses"); |
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979 NEWPERFTICKCOUNTER(_perf_define_appclass_time, SUN_CLS, "defineAppClassTime"); |
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980 NEWPERFTICKCOUNTER(_perf_define_appclass_selftime, SUN_CLS, "defineAppClassTime.self"); |
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981 NEWPERFBYTECOUNTER(_perf_app_classfile_bytes_read, SUN_CLS, "appClassBytes"); |
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982 NEWPERFBYTECOUNTER(_perf_sys_classfile_bytes_read, SUN_CLS, "sysClassBytes"); |
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983 |
0 | 984 |
985 // The following performance counters are added for measuring the impact | |
986 // of the bug fix of 6365597. They are mainly focused on finding out | |
987 // the behavior of system & user-defined classloader lock, whether | |
988 // ClassLoader.loadClass/findClass is being called synchronized or not. | |
989 // Also two additional counters are created to see whether 'UnsyncloadClass' | |
990 // flag is being set or not and how many times load_instance_class call | |
991 // fails with linkageError etc. | |
992 NEWPERFEVENTCOUNTER(_sync_systemLoaderLockContentionRate, SUN_CLS, | |
993 "systemLoaderLockContentionRate"); | |
994 NEWPERFEVENTCOUNTER(_sync_nonSystemLoaderLockContentionRate, SUN_CLS, | |
995 "nonSystemLoaderLockContentionRate"); | |
996 NEWPERFEVENTCOUNTER(_sync_JVMFindLoadedClassLockFreeCounter, SUN_CLS, | |
997 "jvmFindLoadedClassNoLockCalls"); | |
998 NEWPERFEVENTCOUNTER(_sync_JVMDefineClassLockFreeCounter, SUN_CLS, | |
999 "jvmDefineClassNoLockCalls"); | |
1000 | |
1001 NEWPERFEVENTCOUNTER(_sync_JNIDefineClassLockFreeCounter, SUN_CLS, | |
1002 "jniDefineClassNoLockCalls"); | |
1003 | |
1004 NEWPERFEVENTCOUNTER(_unsafe_defineClassCallCounter, SUN_CLS, | |
1005 "unsafeDefineClassCalls"); | |
1006 | |
1007 NEWPERFEVENTCOUNTER(_isUnsyncloadClass, SUN_CLS, "isUnsyncloadClassSet"); | |
1008 NEWPERFEVENTCOUNTER(_load_instance_class_failCounter, SUN_CLS, | |
1009 "loadInstanceClassFailRate"); | |
1010 | |
1011 // increment the isUnsyncloadClass counter if UnsyncloadClass is set. | |
1012 if (UnsyncloadClass) { | |
1013 _isUnsyncloadClass->inc(); | |
1014 } | |
1015 } | |
1016 | |
1017 // lookup zip library entry points | |
1018 load_zip_library(); | |
1019 // initialize search path | |
1020 setup_bootstrap_search_path(); | |
1021 if (LazyBootClassLoader) { | |
1022 // set up meta index which makes boot classpath initialization lazier | |
1023 setup_meta_index(); | |
1024 } | |
1025 } | |
1026 | |
1027 | |
1028 jlong ClassLoader::classloader_time_ms() { | |
1029 return UsePerfData ? | |
1030 Management::ticks_to_ms(_perf_accumulated_time->get_value()) : -1; | |
1031 } | |
1032 | |
1033 jlong ClassLoader::class_init_count() { | |
1034 return UsePerfData ? _perf_classes_inited->get_value() : -1; | |
1035 } | |
1036 | |
1037 jlong ClassLoader::class_init_time_ms() { | |
1038 return UsePerfData ? | |
1039 Management::ticks_to_ms(_perf_class_init_time->get_value()) : -1; | |
1040 } | |
1041 | |
1042 jlong ClassLoader::class_verify_time_ms() { | |
1043 return UsePerfData ? | |
1044 Management::ticks_to_ms(_perf_class_verify_time->get_value()) : -1; | |
1045 } | |
1046 | |
1047 jlong ClassLoader::class_link_count() { | |
1048 return UsePerfData ? _perf_classes_linked->get_value() : -1; | |
1049 } | |
1050 | |
1051 jlong ClassLoader::class_link_time_ms() { | |
1052 return UsePerfData ? | |
1053 Management::ticks_to_ms(_perf_class_link_time->get_value()) : -1; | |
1054 } | |
1055 | |
1056 int ClassLoader::compute_Object_vtable() { | |
1057 // hardwired for JDK1.2 -- would need to duplicate class file parsing | |
1058 // code to determine actual value from file | |
1059 // Would be value '11' if finals were in vtable | |
1060 int JDK_1_2_Object_vtable_size = 5; | |
1061 return JDK_1_2_Object_vtable_size * vtableEntry::size(); | |
1062 } | |
1063 | |
1064 | |
1065 void classLoader_init() { | |
1066 ClassLoader::initialize(); | |
1067 } | |
1068 | |
1069 | |
1070 bool ClassLoader::get_canonical_path(char* orig, char* out, int len) { | |
1071 assert(orig != NULL && out != NULL && len > 0, "bad arguments"); | |
1072 if (CanonicalizeEntry != NULL) { | |
1073 JNIEnv* env = JavaThread::current()->jni_environment(); | |
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1074 if ((CanonicalizeEntry)(env, os::native_path(orig), out, len) < 0) { |
0 | 1075 return false; |
1076 } | |
1077 } else { | |
1078 // On JDK 1.2.2 the Canonicalize does not exist, so just do nothing | |
1079 strncpy(out, orig, len); | |
1080 out[len - 1] = '\0'; | |
1081 } | |
1082 return true; | |
1083 } | |
1084 | |
1085 #ifndef PRODUCT | |
1086 | |
1087 void ClassLoader::verify() { | |
1088 _package_hash_table->verify(); | |
1089 } | |
1090 | |
1091 | |
1092 // CompileTheWorld | |
1093 // | |
1094 // Iterates over all class path entries and forces compilation of all methods | |
1095 // in all classes found. Currently, only zip/jar archives are searched. | |
1096 // | |
1097 // The classes are loaded by the Java level bootstrap class loader, and the | |
1098 // initializer is called. If DelayCompilationDuringStartup is true (default), | |
1099 // the interpreter will run the initialization code. Note that forcing | |
1100 // initialization in this way could potentially lead to initialization order | |
1101 // problems, in which case we could just force the initialization bit to be set. | |
1102 | |
1103 | |
1104 // We need to iterate over the contents of a zip/jar file, so we replicate the | |
1105 // jzcell and jzfile definitions from zip_util.h but rename jzfile to real_jzfile, | |
1106 // since jzfile already has a void* definition. | |
1107 // | |
1108 // Note that this is only used in debug mode. | |
1109 // | |
1110 // HotSpot integration note: | |
1111 // Matches zip_util.h 1.14 99/06/01 from jdk1.3 beta H build | |
1112 | |
1113 | |
1114 // JDK 1.3 version | |
1115 typedef struct real_jzentry13 { /* Zip file entry */ | |
1116 char *name; /* entry name */ | |
1117 jint time; /* modification time */ | |
1118 jint size; /* size of uncompressed data */ | |
1119 jint csize; /* size of compressed data (zero if uncompressed) */ | |
1120 jint crc; /* crc of uncompressed data */ | |
1121 char *comment; /* optional zip file comment */ | |
1122 jbyte *extra; /* optional extra data */ | |
1123 jint pos; /* position of LOC header (if negative) or data */ | |
1124 } real_jzentry13; | |
1125 | |
1126 typedef struct real_jzfile13 { /* Zip file */ | |
1127 char *name; /* zip file name */ | |
1128 jint refs; /* number of active references */ | |
1129 jint fd; /* open file descriptor */ | |
1130 void *lock; /* read lock */ | |
1131 char *comment; /* zip file comment */ | |
1132 char *msg; /* zip error message */ | |
1133 void *entries; /* array of hash cells */ | |
1134 jint total; /* total number of entries */ | |
1135 unsigned short *table; /* Hash chain heads: indexes into entries */ | |
1136 jint tablelen; /* number of hash eads */ | |
1137 real_jzfile13 *next; /* next zip file in search list */ | |
1138 jzentry *cache; /* we cache the most recently freed jzentry */ | |
1139 /* Information on metadata names in META-INF directory */ | |
1140 char **metanames; /* array of meta names (may have null names) */ | |
1141 jint metacount; /* number of slots in metanames array */ | |
1142 /* If there are any per-entry comments, they are in the comments array */ | |
1143 char **comments; | |
1144 } real_jzfile13; | |
1145 | |
1146 // JDK 1.2 version | |
1147 typedef struct real_jzentry12 { /* Zip file entry */ | |
1148 char *name; /* entry name */ | |
1149 jint time; /* modification time */ | |
1150 jint size; /* size of uncompressed data */ | |
1151 jint csize; /* size of compressed data (zero if uncompressed) */ | |
1152 jint crc; /* crc of uncompressed data */ | |
1153 char *comment; /* optional zip file comment */ | |
1154 jbyte *extra; /* optional extra data */ | |
1155 jint pos; /* position of LOC header (if negative) or data */ | |
1156 struct real_jzentry12 *next; /* next entry in hash table */ | |
1157 } real_jzentry12; | |
1158 | |
1159 typedef struct real_jzfile12 { /* Zip file */ | |
1160 char *name; /* zip file name */ | |
1161 jint refs; /* number of active references */ | |
1162 jint fd; /* open file descriptor */ | |
1163 void *lock; /* read lock */ | |
1164 char *comment; /* zip file comment */ | |
1165 char *msg; /* zip error message */ | |
1166 real_jzentry12 *entries; /* array of zip entries */ | |
1167 jint total; /* total number of entries */ | |
1168 real_jzentry12 **table; /* hash table of entries */ | |
1169 jint tablelen; /* number of buckets */ | |
1170 jzfile *next; /* next zip file in search list */ | |
1171 } real_jzfile12; | |
1172 | |
1173 | |
1174 void ClassPathDirEntry::compile_the_world(Handle loader, TRAPS) { | |
1175 // For now we only compile all methods in all classes in zip/jar files | |
1176 tty->print_cr("CompileTheWorld : Skipped classes in %s", _dir); | |
1177 tty->cr(); | |
1178 } | |
1179 | |
1180 | |
1181 bool ClassPathDirEntry::is_rt_jar() { | |
1182 return false; | |
1183 } | |
1184 | |
1185 void ClassPathZipEntry::compile_the_world(Handle loader, TRAPS) { | |
1186 if (JDK_Version::is_jdk12x_version()) { | |
1187 compile_the_world12(loader, THREAD); | |
1188 } else { | |
1189 compile_the_world13(loader, THREAD); | |
1190 } | |
1191 if (HAS_PENDING_EXCEPTION) { | |
1192 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { | |
1193 CLEAR_PENDING_EXCEPTION; | |
1194 tty->print_cr("\nCompileTheWorld : Ran out of memory\n"); | |
1195 size_t used = Universe::heap()->permanent_used(); | |
1196 size_t capacity = Universe::heap()->permanent_capacity(); | |
1197 tty->print_cr("Permanent generation used %dK of %dK", used/K, capacity/K); | |
1198 tty->print_cr("Increase size by setting e.g. -XX:MaxPermSize=%dK\n", capacity*2/K); | |
1199 } else { | |
1200 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n"); | |
1201 } | |
1202 } | |
1203 } | |
1204 | |
1205 // Version that works for JDK 1.3.x | |
1206 void ClassPathZipEntry::compile_the_world13(Handle loader, TRAPS) { | |
1207 real_jzfile13* zip = (real_jzfile13*) _zip; | |
1208 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name); | |
1209 tty->cr(); | |
1210 // Iterate over all entries in zip file | |
1211 for (int n = 0; ; n++) { | |
1212 real_jzentry13 * ze = (real_jzentry13 *)((*GetNextEntry)(_zip, n)); | |
1213 if (ze == NULL) break; | |
1214 ClassLoader::compile_the_world_in(ze->name, loader, CHECK); | |
1215 } | |
1216 } | |
1217 | |
1218 | |
1219 // Version that works for JDK 1.2.x | |
1220 void ClassPathZipEntry::compile_the_world12(Handle loader, TRAPS) { | |
1221 real_jzfile12* zip = (real_jzfile12*) _zip; | |
1222 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name); | |
1223 tty->cr(); | |
1224 // Iterate over all entries in zip file | |
1225 for (int n = 0; ; n++) { | |
1226 real_jzentry12 * ze = (real_jzentry12 *)((*GetNextEntry)(_zip, n)); | |
1227 if (ze == NULL) break; | |
1228 ClassLoader::compile_the_world_in(ze->name, loader, CHECK); | |
1229 } | |
1230 } | |
1231 | |
1232 bool ClassPathZipEntry::is_rt_jar() { | |
1233 if (JDK_Version::is_jdk12x_version()) { | |
1234 return is_rt_jar12(); | |
1235 } else { | |
1236 return is_rt_jar13(); | |
1237 } | |
1238 } | |
1239 | |
1240 // JDK 1.3 version | |
1241 bool ClassPathZipEntry::is_rt_jar13() { | |
1242 real_jzfile13* zip = (real_jzfile13*) _zip; | |
1243 int len = (int)strlen(zip->name); | |
1244 // Check whether zip name ends in "rt.jar" | |
1245 // This will match other archives named rt.jar as well, but this is | |
1246 // only used for debugging. | |
1247 return (len >= 6) && (strcasecmp(zip->name + len - 6, "rt.jar") == 0); | |
1248 } | |
1249 | |
1250 // JDK 1.2 version | |
1251 bool ClassPathZipEntry::is_rt_jar12() { | |
1252 real_jzfile12* zip = (real_jzfile12*) _zip; | |
1253 int len = (int)strlen(zip->name); | |
1254 // Check whether zip name ends in "rt.jar" | |
1255 // This will match other archives named rt.jar as well, but this is | |
1256 // only used for debugging. | |
1257 return (len >= 6) && (strcasecmp(zip->name + len - 6, "rt.jar") == 0); | |
1258 } | |
1259 | |
1260 void LazyClassPathEntry::compile_the_world(Handle loader, TRAPS) { | |
1261 resolve_entry()->compile_the_world(loader, CHECK); | |
1262 } | |
1263 | |
1264 bool LazyClassPathEntry::is_rt_jar() { | |
1265 return resolve_entry()->is_rt_jar(); | |
1266 } | |
1267 | |
1268 void ClassLoader::compile_the_world() { | |
1269 EXCEPTION_MARK; | |
1270 HandleMark hm(THREAD); | |
1271 ResourceMark rm(THREAD); | |
1272 // Make sure we don't run with background compilation | |
1273 BackgroundCompilation = false; | |
1274 // Find bootstrap loader | |
1275 Handle system_class_loader (THREAD, SystemDictionary::java_system_loader()); | |
1276 // Iterate over all bootstrap class path entries | |
1277 ClassPathEntry* e = _first_entry; | |
1278 while (e != NULL) { | |
1279 // We stop at rt.jar, unless it is the first bootstrap path entry | |
1280 if (e->is_rt_jar() && e != _first_entry) break; | |
1281 e->compile_the_world(system_class_loader, CATCH); | |
1282 e = e->next(); | |
1283 } | |
1284 tty->print_cr("CompileTheWorld : Done"); | |
1285 { | |
1286 // Print statistics as if before normal exit: | |
1287 extern void print_statistics(); | |
1288 print_statistics(); | |
1289 } | |
1290 vm_exit(0); | |
1291 } | |
1292 | |
1293 int ClassLoader::_compile_the_world_counter = 0; | |
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1294 static int _codecache_sweep_counter = 0; |
0 | 1295 |
2257 | 1296 // Filter out all exceptions except OOMs |
1297 static void clear_pending_exception_if_not_oom(TRAPS) { | |
1298 if (HAS_PENDING_EXCEPTION && | |
1299 !PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { | |
1300 CLEAR_PENDING_EXCEPTION; | |
1301 } | |
1302 // The CHECK at the caller will propagate the exception out | |
1303 } | |
1304 | |
0 | 1305 void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) { |
1306 int len = (int)strlen(name); | |
1307 if (len > 6 && strcmp(".class", name + len - 6) == 0) { | |
1308 // We have a .class file | |
1309 char buffer[2048]; | |
1310 strncpy(buffer, name, len - 6); | |
1311 buffer[len-6] = 0; | |
1312 // If the file has a period after removing .class, it's not really a | |
1313 // valid class file. The class loader will check everything else. | |
1314 if (strchr(buffer, '.') == NULL) { | |
1315 _compile_the_world_counter++; | |
723 | 1316 if (_compile_the_world_counter > CompileTheWorldStopAt) return; |
1317 | |
1318 // Construct name without extension | |
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1319 TempNewSymbol sym = SymbolTable::new_symbol(buffer, CHECK); |
723 | 1320 // Use loader to load and initialize class |
1321 klassOop ik = SystemDictionary::resolve_or_null(sym, loader, Handle(), THREAD); | |
1322 instanceKlassHandle k (THREAD, ik); | |
1323 if (k.not_null() && !HAS_PENDING_EXCEPTION) { | |
1324 k->initialize(THREAD); | |
1325 } | |
1326 bool exception_occurred = HAS_PENDING_EXCEPTION; | |
2257 | 1327 clear_pending_exception_if_not_oom(CHECK); |
723 | 1328 if (CompileTheWorldPreloadClasses && k.not_null()) { |
1329 constantPoolKlass::preload_and_initialize_all_classes(k->constants(), THREAD); | |
1330 if (HAS_PENDING_EXCEPTION) { | |
1331 // If something went wrong in preloading we just ignore it | |
2257 | 1332 clear_pending_exception_if_not_oom(CHECK); |
723 | 1333 tty->print_cr("Preloading failed for (%d) %s", _compile_the_world_counter, buffer); |
0 | 1334 } |
723 | 1335 } |
1336 | |
1337 if (_compile_the_world_counter >= CompileTheWorldStartAt) { | |
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1338 if (k.is_null() || exception_occurred) { |
0 | 1339 // If something went wrong (e.g. ExceptionInInitializerError) we skip this class |
1340 tty->print_cr("CompileTheWorld (%d) : Skipping %s", _compile_the_world_counter, buffer); | |
1341 } else { | |
1342 tty->print_cr("CompileTheWorld (%d) : %s", _compile_the_world_counter, buffer); | |
1343 // Preload all classes to get around uncommon traps | |
1344 // Iterate over all methods in class | |
1345 for (int n = 0; n < k->methods()->length(); n++) { | |
1346 methodHandle m (THREAD, methodOop(k->methods()->obj_at(n))); | |
1783 | 1347 if (CompilationPolicy::can_be_compiled(m)) { |
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1348 |
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1349 if (++_codecache_sweep_counter == CompileTheWorldSafepointInterval) { |
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1350 // Give sweeper a chance to keep up with CTW |
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1351 VM_ForceSafepoint op; |
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1352 VMThread::execute(&op); |
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1353 _codecache_sweep_counter = 0; |
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1354 } |
0 | 1355 // Force compilation |
3837
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1356 CompileBroker::compile_method(m, InvocationEntryBci, CompilationPolicy::policy()->initial_compile_level(), |
0 | 1357 methodHandle(), 0, "CTW", THREAD); |
1358 if (HAS_PENDING_EXCEPTION) { | |
2257 | 1359 clear_pending_exception_if_not_oom(CHECK); |
0 | 1360 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_counter, m->name()->as_C_string()); |
1361 } | |
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1362 if (TieredCompilation && TieredStopAtLevel >= CompLevel_full_optimization) { |
723 | 1363 // Clobber the first compile and force second tier compilation |
1364 nmethod* nm = m->code(); | |
1365 if (nm != NULL) { | |
1366 // Throw out the code so that the code cache doesn't fill up | |
1367 nm->make_not_entrant(); | |
1368 m->clear_code(); | |
1369 } | |
1783 | 1370 CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_full_optimization, |
723 | 1371 methodHandle(), 0, "CTW", THREAD); |
1372 if (HAS_PENDING_EXCEPTION) { | |
2257 | 1373 clear_pending_exception_if_not_oom(CHECK); |
723 | 1374 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_counter, m->name()->as_C_string()); |
1375 } | |
0 | 1376 } |
1377 } | |
723 | 1378 |
1379 nmethod* nm = m->code(); | |
1380 if (nm != NULL) { | |
1381 // Throw out the code so that the code cache doesn't fill up | |
1382 nm->make_not_entrant(); | |
1383 m->clear_code(); | |
0 | 1384 } |
1385 } | |
1386 } | |
1387 } | |
1388 } | |
1389 } | |
1390 } | |
1391 | |
1392 #endif //PRODUCT | |
2139
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1393 |
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1394 // Please keep following two functions at end of this file. With them placed at top or in middle of the file, |
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1395 // they could get inlined by agressive compiler, an unknown trick, see bug 6966589. |
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1396 void PerfClassTraceTime::initialize() { |
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1397 if (!UsePerfData) return; |
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1398 |
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1399 if (_eventp != NULL) { |
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1400 // increment the event counter |
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1401 _eventp->inc(); |
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1402 } |
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1403 |
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1404 // stop the current active thread-local timer to measure inclusive time |
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1405 _prev_active_event = -1; |
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1406 for (int i=0; i < EVENT_TYPE_COUNT; i++) { |
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1407 if (_timers[i].is_active()) { |
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1408 assert(_prev_active_event == -1, "should have only one active timer"); |
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1409 _prev_active_event = i; |
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1410 _timers[i].stop(); |
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1411 } |
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1412 } |
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1413 |
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1414 if (_recursion_counters == NULL || (_recursion_counters[_event_type])++ == 0) { |
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1415 // start the inclusive timer if not recursively called |
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1416 _t.start(); |
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1417 } |
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1418 |
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1419 // start thread-local timer of the given event type |
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1420 if (!_timers[_event_type].is_active()) { |
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1421 _timers[_event_type].start(); |
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1422 } |
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1423 } |
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1424 |
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1425 PerfClassTraceTime::~PerfClassTraceTime() { |
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1426 if (!UsePerfData) return; |
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|
1427 |
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1428 // stop the thread-local timer as the event completes |
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1429 // and resume the thread-local timer of the event next on the stack |
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1430 _timers[_event_type].stop(); |
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1431 jlong selftime = _timers[_event_type].ticks(); |
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|
1432 |
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1433 if (_prev_active_event >= 0) { |
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1434 _timers[_prev_active_event].start(); |
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1435 } |
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1436 |
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1437 if (_recursion_counters != NULL && --(_recursion_counters[_event_type]) > 0) return; |
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1438 |
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1439 // increment the counters only on the leaf call |
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1440 _t.stop(); |
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1441 _timep->inc(_t.ticks()); |
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1442 if (_selftimep != NULL) { |
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|
1443 _selftimep->inc(selftime); |
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1444 } |
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1445 // add all class loading related event selftime to the accumulated time counter |
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1446 ClassLoader::perf_accumulated_time()->inc(selftime); |
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|
1447 |
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1448 // reset the timer |
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|
1449 _timers[_event_type].reset(); |
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1450 } |