Mercurial > hg > truffle
annotate src/share/vm/runtime/arguments.cpp @ 10:28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
Summary: Use the same default number of GC threads as used by ParNewGC and ConcMarkSweepGC (i.e., the 5/8th rule).
Reviewed-by: ysr, tonyp
author | jmasa |
---|---|
date | Fri, 22 Feb 2008 17:17:14 -0800 |
parents | a61af66fc99e |
children | 183f41cf8bfe |
rev | line source |
---|---|
0 | 1 /* |
2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_arguments.cpp.incl" | |
27 | |
28 #define DEFAULT_VENDOR_URL_BUG "http://java.sun.com/webapps/bugreport/crash.jsp" | |
29 #define DEFAULT_JAVA_LAUNCHER "generic" | |
30 | |
31 char** Arguments::_jvm_flags_array = NULL; | |
32 int Arguments::_num_jvm_flags = 0; | |
33 char** Arguments::_jvm_args_array = NULL; | |
34 int Arguments::_num_jvm_args = 0; | |
35 char* Arguments::_java_command = NULL; | |
36 SystemProperty* Arguments::_system_properties = NULL; | |
37 const char* Arguments::_gc_log_filename = NULL; | |
38 bool Arguments::_has_profile = false; | |
39 bool Arguments::_has_alloc_profile = false; | |
40 uintx Arguments::_initial_heap_size = 0; | |
41 uintx Arguments::_min_heap_size = 0; | |
42 Arguments::Mode Arguments::_mode = _mixed; | |
43 bool Arguments::_java_compiler = false; | |
44 bool Arguments::_xdebug_mode = false; | |
45 const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG; | |
46 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER; | |
47 int Arguments::_sun_java_launcher_pid = -1; | |
48 | |
49 // These parameters are reset in method parse_vm_init_args(JavaVMInitArgs*) | |
50 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; | |
51 bool Arguments::_UseOnStackReplacement = UseOnStackReplacement; | |
52 bool Arguments::_BackgroundCompilation = BackgroundCompilation; | |
53 bool Arguments::_ClipInlining = ClipInlining; | |
54 intx Arguments::_Tier2CompileThreshold = Tier2CompileThreshold; | |
55 | |
56 char* Arguments::SharedArchivePath = NULL; | |
57 | |
58 AgentLibraryList Arguments::_libraryList; | |
59 AgentLibraryList Arguments::_agentList; | |
60 | |
61 abort_hook_t Arguments::_abort_hook = NULL; | |
62 exit_hook_t Arguments::_exit_hook = NULL; | |
63 vfprintf_hook_t Arguments::_vfprintf_hook = NULL; | |
64 | |
65 | |
66 SystemProperty *Arguments::_java_ext_dirs = NULL; | |
67 SystemProperty *Arguments::_java_endorsed_dirs = NULL; | |
68 SystemProperty *Arguments::_sun_boot_library_path = NULL; | |
69 SystemProperty *Arguments::_java_library_path = NULL; | |
70 SystemProperty *Arguments::_java_home = NULL; | |
71 SystemProperty *Arguments::_java_class_path = NULL; | |
72 SystemProperty *Arguments::_sun_boot_class_path = NULL; | |
73 | |
74 char* Arguments::_meta_index_path = NULL; | |
75 char* Arguments::_meta_index_dir = NULL; | |
76 | |
77 static bool force_client_mode = false; | |
78 | |
79 // Check if head of 'option' matches 'name', and sets 'tail' remaining part of option string | |
80 | |
81 static bool match_option(const JavaVMOption *option, const char* name, | |
82 const char** tail) { | |
83 int len = (int)strlen(name); | |
84 if (strncmp(option->optionString, name, len) == 0) { | |
85 *tail = option->optionString + len; | |
86 return true; | |
87 } else { | |
88 return false; | |
89 } | |
90 } | |
91 | |
92 static void logOption(const char* opt) { | |
93 if (PrintVMOptions) { | |
94 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt); | |
95 } | |
96 } | |
97 | |
98 // Process java launcher properties. | |
99 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) { | |
100 // See if sun.java.launcher or sun.java.launcher.pid is defined. | |
101 // Must do this before setting up other system properties, | |
102 // as some of them may depend on launcher type. | |
103 for (int index = 0; index < args->nOptions; index++) { | |
104 const JavaVMOption* option = args->options + index; | |
105 const char* tail; | |
106 | |
107 if (match_option(option, "-Dsun.java.launcher=", &tail)) { | |
108 process_java_launcher_argument(tail, option->extraInfo); | |
109 continue; | |
110 } | |
111 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) { | |
112 _sun_java_launcher_pid = atoi(tail); | |
113 continue; | |
114 } | |
115 } | |
116 } | |
117 | |
118 // Initialize system properties key and value. | |
119 void Arguments::init_system_properties() { | |
120 | |
121 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.version", "1.0", false)); | |
122 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name", | |
123 "Java Virtual Machine Specification", false)); | |
124 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.vendor", | |
125 "Sun Microsystems Inc.", false)); | |
126 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false)); | |
127 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false)); | |
128 PropertyList_add(&_system_properties, new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false)); | |
129 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true)); | |
130 | |
131 // following are JVMTI agent writeable properties. | |
132 // Properties values are set to NULL and they are | |
133 // os specific they are initialized in os::init_system_properties_values(). | |
134 _java_ext_dirs = new SystemProperty("java.ext.dirs", NULL, true); | |
135 _java_endorsed_dirs = new SystemProperty("java.endorsed.dirs", NULL, true); | |
136 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true); | |
137 _java_library_path = new SystemProperty("java.library.path", NULL, true); | |
138 _java_home = new SystemProperty("java.home", NULL, true); | |
139 _sun_boot_class_path = new SystemProperty("sun.boot.class.path", NULL, true); | |
140 | |
141 _java_class_path = new SystemProperty("java.class.path", "", true); | |
142 | |
143 // Add to System Property list. | |
144 PropertyList_add(&_system_properties, _java_ext_dirs); | |
145 PropertyList_add(&_system_properties, _java_endorsed_dirs); | |
146 PropertyList_add(&_system_properties, _sun_boot_library_path); | |
147 PropertyList_add(&_system_properties, _java_library_path); | |
148 PropertyList_add(&_system_properties, _java_home); | |
149 PropertyList_add(&_system_properties, _java_class_path); | |
150 PropertyList_add(&_system_properties, _sun_boot_class_path); | |
151 | |
152 // Set OS specific system properties values | |
153 os::init_system_properties_values(); | |
154 } | |
155 | |
156 // String containing commands that will be ignored and cause a | |
157 // warning to be issued. These commands should be accepted | |
158 // for 1.6 but not 1.7. The string should be cleared at the | |
159 // beginning of 1.7. | |
160 static const char* obsolete_jvm_flags_1_5_0[] = { | |
161 "UseTrainGC", | |
162 "UseSpecialLargeObjectHandling", | |
163 "UseOversizedCarHandling", | |
164 "TraceCarAllocation", | |
165 "PrintTrainGCProcessingStats", | |
166 "LogOfCarSpaceSize", | |
167 "OversizedCarThreshold", | |
168 "MinTickInterval", | |
169 "DefaultTickInterval", | |
170 "MaxTickInterval", | |
171 "DelayTickAdjustment", | |
172 "ProcessingToTenuringRatio", | |
173 "MinTrainLength", | |
174 0}; | |
175 | |
176 bool Arguments::made_obsolete_in_1_5_0(const char *s) { | |
177 int i = 0; | |
178 while (obsolete_jvm_flags_1_5_0[i] != NULL) { | |
179 // <flag>=xxx form | |
180 // [-|+]<flag> form | |
181 if ((strncmp(obsolete_jvm_flags_1_5_0[i], s, | |
182 strlen(obsolete_jvm_flags_1_5_0[i])) == 0) || | |
183 ((s[0] == '+' || s[0] == '-') && | |
184 (strncmp(obsolete_jvm_flags_1_5_0[i], &s[1], | |
185 strlen(obsolete_jvm_flags_1_5_0[i])) == 0))) { | |
186 return true; | |
187 } | |
188 i++; | |
189 } | |
190 return false; | |
191 } | |
192 | |
193 // Constructs the system class path (aka boot class path) from the following | |
194 // components, in order: | |
195 // | |
196 // prefix // from -Xbootclasspath/p:... | |
197 // endorsed // the expansion of -Djava.endorsed.dirs=... | |
198 // base // from os::get_system_properties() or -Xbootclasspath= | |
199 // suffix // from -Xbootclasspath/a:... | |
200 // | |
201 // java.endorsed.dirs is a list of directories; any jar or zip files in the | |
202 // directories are added to the sysclasspath just before the base. | |
203 // | |
204 // This could be AllStatic, but it isn't needed after argument processing is | |
205 // complete. | |
206 class SysClassPath: public StackObj { | |
207 public: | |
208 SysClassPath(const char* base); | |
209 ~SysClassPath(); | |
210 | |
211 inline void set_base(const char* base); | |
212 inline void add_prefix(const char* prefix); | |
213 inline void add_suffix(const char* suffix); | |
214 inline void reset_path(const char* base); | |
215 | |
216 // Expand the jar/zip files in each directory listed by the java.endorsed.dirs | |
217 // property. Must be called after all command-line arguments have been | |
218 // processed (in particular, -Djava.endorsed.dirs=...) and before calling | |
219 // combined_path(). | |
220 void expand_endorsed(); | |
221 | |
222 inline const char* get_base() const { return _items[_scp_base]; } | |
223 inline const char* get_prefix() const { return _items[_scp_prefix]; } | |
224 inline const char* get_suffix() const { return _items[_scp_suffix]; } | |
225 inline const char* get_endorsed() const { return _items[_scp_endorsed]; } | |
226 | |
227 // Combine all the components into a single c-heap-allocated string; caller | |
228 // must free the string if/when no longer needed. | |
229 char* combined_path(); | |
230 | |
231 private: | |
232 // Utility routines. | |
233 static char* add_to_path(const char* path, const char* str, bool prepend); | |
234 static char* add_jars_to_path(char* path, const char* directory); | |
235 | |
236 inline void reset_item_at(int index); | |
237 | |
238 // Array indices for the items that make up the sysclasspath. All except the | |
239 // base are allocated in the C heap and freed by this class. | |
240 enum { | |
241 _scp_prefix, // from -Xbootclasspath/p:... | |
242 _scp_endorsed, // the expansion of -Djava.endorsed.dirs=... | |
243 _scp_base, // the default sysclasspath | |
244 _scp_suffix, // from -Xbootclasspath/a:... | |
245 _scp_nitems // the number of items, must be last. | |
246 }; | |
247 | |
248 const char* _items[_scp_nitems]; | |
249 DEBUG_ONLY(bool _expansion_done;) | |
250 }; | |
251 | |
252 SysClassPath::SysClassPath(const char* base) { | |
253 memset(_items, 0, sizeof(_items)); | |
254 _items[_scp_base] = base; | |
255 DEBUG_ONLY(_expansion_done = false;) | |
256 } | |
257 | |
258 SysClassPath::~SysClassPath() { | |
259 // Free everything except the base. | |
260 for (int i = 0; i < _scp_nitems; ++i) { | |
261 if (i != _scp_base) reset_item_at(i); | |
262 } | |
263 DEBUG_ONLY(_expansion_done = false;) | |
264 } | |
265 | |
266 inline void SysClassPath::set_base(const char* base) { | |
267 _items[_scp_base] = base; | |
268 } | |
269 | |
270 inline void SysClassPath::add_prefix(const char* prefix) { | |
271 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], prefix, true); | |
272 } | |
273 | |
274 inline void SysClassPath::add_suffix(const char* suffix) { | |
275 _items[_scp_suffix] = add_to_path(_items[_scp_suffix], suffix, false); | |
276 } | |
277 | |
278 inline void SysClassPath::reset_item_at(int index) { | |
279 assert(index < _scp_nitems && index != _scp_base, "just checking"); | |
280 if (_items[index] != NULL) { | |
281 FREE_C_HEAP_ARRAY(char, _items[index]); | |
282 _items[index] = NULL; | |
283 } | |
284 } | |
285 | |
286 inline void SysClassPath::reset_path(const char* base) { | |
287 // Clear the prefix and suffix. | |
288 reset_item_at(_scp_prefix); | |
289 reset_item_at(_scp_suffix); | |
290 set_base(base); | |
291 } | |
292 | |
293 //------------------------------------------------------------------------------ | |
294 | |
295 void SysClassPath::expand_endorsed() { | |
296 assert(_items[_scp_endorsed] == NULL, "can only be called once."); | |
297 | |
298 const char* path = Arguments::get_property("java.endorsed.dirs"); | |
299 if (path == NULL) { | |
300 path = Arguments::get_endorsed_dir(); | |
301 assert(path != NULL, "no default for java.endorsed.dirs"); | |
302 } | |
303 | |
304 char* expanded_path = NULL; | |
305 const char separator = *os::path_separator(); | |
306 const char* const end = path + strlen(path); | |
307 while (path < end) { | |
308 const char* tmp_end = strchr(path, separator); | |
309 if (tmp_end == NULL) { | |
310 expanded_path = add_jars_to_path(expanded_path, path); | |
311 path = end; | |
312 } else { | |
313 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1); | |
314 memcpy(dirpath, path, tmp_end - path); | |
315 dirpath[tmp_end - path] = '\0'; | |
316 expanded_path = add_jars_to_path(expanded_path, dirpath); | |
317 FREE_C_HEAP_ARRAY(char, dirpath); | |
318 path = tmp_end + 1; | |
319 } | |
320 } | |
321 _items[_scp_endorsed] = expanded_path; | |
322 DEBUG_ONLY(_expansion_done = true;) | |
323 } | |
324 | |
325 // Combine the bootclasspath elements, some of which may be null, into a single | |
326 // c-heap-allocated string. | |
327 char* SysClassPath::combined_path() { | |
328 assert(_items[_scp_base] != NULL, "empty default sysclasspath"); | |
329 assert(_expansion_done, "must call expand_endorsed() first."); | |
330 | |
331 size_t lengths[_scp_nitems]; | |
332 size_t total_len = 0; | |
333 | |
334 const char separator = *os::path_separator(); | |
335 | |
336 // Get the lengths. | |
337 int i; | |
338 for (i = 0; i < _scp_nitems; ++i) { | |
339 if (_items[i] != NULL) { | |
340 lengths[i] = strlen(_items[i]); | |
341 // Include space for the separator char (or a NULL for the last item). | |
342 total_len += lengths[i] + 1; | |
343 } | |
344 } | |
345 assert(total_len > 0, "empty sysclasspath not allowed"); | |
346 | |
347 // Copy the _items to a single string. | |
348 char* cp = NEW_C_HEAP_ARRAY(char, total_len); | |
349 char* cp_tmp = cp; | |
350 for (i = 0; i < _scp_nitems; ++i) { | |
351 if (_items[i] != NULL) { | |
352 memcpy(cp_tmp, _items[i], lengths[i]); | |
353 cp_tmp += lengths[i]; | |
354 *cp_tmp++ = separator; | |
355 } | |
356 } | |
357 *--cp_tmp = '\0'; // Replace the extra separator. | |
358 return cp; | |
359 } | |
360 | |
361 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null. | |
362 char* | |
363 SysClassPath::add_to_path(const char* path, const char* str, bool prepend) { | |
364 char *cp; | |
365 | |
366 assert(str != NULL, "just checking"); | |
367 if (path == NULL) { | |
368 size_t len = strlen(str) + 1; | |
369 cp = NEW_C_HEAP_ARRAY(char, len); | |
370 memcpy(cp, str, len); // copy the trailing null | |
371 } else { | |
372 const char separator = *os::path_separator(); | |
373 size_t old_len = strlen(path); | |
374 size_t str_len = strlen(str); | |
375 size_t len = old_len + str_len + 2; | |
376 | |
377 if (prepend) { | |
378 cp = NEW_C_HEAP_ARRAY(char, len); | |
379 char* cp_tmp = cp; | |
380 memcpy(cp_tmp, str, str_len); | |
381 cp_tmp += str_len; | |
382 *cp_tmp = separator; | |
383 memcpy(++cp_tmp, path, old_len + 1); // copy the trailing null | |
384 FREE_C_HEAP_ARRAY(char, path); | |
385 } else { | |
386 cp = REALLOC_C_HEAP_ARRAY(char, path, len); | |
387 char* cp_tmp = cp + old_len; | |
388 *cp_tmp = separator; | |
389 memcpy(++cp_tmp, str, str_len + 1); // copy the trailing null | |
390 } | |
391 } | |
392 return cp; | |
393 } | |
394 | |
395 // Scan the directory and append any jar or zip files found to path. | |
396 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null. | |
397 char* SysClassPath::add_jars_to_path(char* path, const char* directory) { | |
398 DIR* dir = os::opendir(directory); | |
399 if (dir == NULL) return path; | |
400 | |
401 char dir_sep[2] = { '\0', '\0' }; | |
402 size_t directory_len = strlen(directory); | |
403 const char fileSep = *os::file_separator(); | |
404 if (directory[directory_len - 1] != fileSep) dir_sep[0] = fileSep; | |
405 | |
406 /* Scan the directory for jars/zips, appending them to path. */ | |
407 struct dirent *entry; | |
408 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory)); | |
409 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL) { | |
410 const char* name = entry->d_name; | |
411 const char* ext = name + strlen(name) - 4; | |
412 bool isJarOrZip = ext > name && | |
413 (os::file_name_strcmp(ext, ".jar") == 0 || | |
414 os::file_name_strcmp(ext, ".zip") == 0); | |
415 if (isJarOrZip) { | |
416 char* jarpath = NEW_C_HEAP_ARRAY(char, directory_len + 2 + strlen(name)); | |
417 sprintf(jarpath, "%s%s%s", directory, dir_sep, name); | |
418 path = add_to_path(path, jarpath, false); | |
419 FREE_C_HEAP_ARRAY(char, jarpath); | |
420 } | |
421 } | |
422 FREE_C_HEAP_ARRAY(char, dbuf); | |
423 os::closedir(dir); | |
424 return path; | |
425 } | |
426 | |
427 // Parses a memory size specification string. | |
428 static bool atomll(const char *s, jlong* result) { | |
429 jlong n = 0; | |
430 int args_read = sscanf(s, os::jlong_format_specifier(), &n); | |
431 if (args_read != 1) { | |
432 return false; | |
433 } | |
434 while (*s != '\0' && isdigit(*s)) { | |
435 s++; | |
436 } | |
437 // 4705540: illegal if more characters are found after the first non-digit | |
438 if (strlen(s) > 1) { | |
439 return false; | |
440 } | |
441 switch (*s) { | |
442 case 'T': case 't': | |
443 *result = n * G * K; | |
444 return true; | |
445 case 'G': case 'g': | |
446 *result = n * G; | |
447 return true; | |
448 case 'M': case 'm': | |
449 *result = n * M; | |
450 return true; | |
451 case 'K': case 'k': | |
452 *result = n * K; | |
453 return true; | |
454 case '\0': | |
455 *result = n; | |
456 return true; | |
457 default: | |
458 return false; | |
459 } | |
460 } | |
461 | |
462 Arguments::ArgsRange Arguments::check_memory_size(jlong size, jlong min_size) { | |
463 if (size < min_size) return arg_too_small; | |
464 // Check that size will fit in a size_t (only relevant on 32-bit) | |
465 if ((julong) size > max_uintx) return arg_too_big; | |
466 return arg_in_range; | |
467 } | |
468 | |
469 // Describe an argument out of range error | |
470 void Arguments::describe_range_error(ArgsRange errcode) { | |
471 switch(errcode) { | |
472 case arg_too_big: | |
473 jio_fprintf(defaultStream::error_stream(), | |
474 "The specified size exceeds the maximum " | |
475 "representable size.\n"); | |
476 break; | |
477 case arg_too_small: | |
478 case arg_unreadable: | |
479 case arg_in_range: | |
480 // do nothing for now | |
481 break; | |
482 default: | |
483 ShouldNotReachHere(); | |
484 } | |
485 } | |
486 | |
487 static bool set_bool_flag(char* name, bool value, FlagValueOrigin origin) { | |
488 return CommandLineFlags::boolAtPut(name, &value, origin); | |
489 } | |
490 | |
491 | |
492 static bool set_fp_numeric_flag(char* name, char* value, FlagValueOrigin origin) { | |
493 double v; | |
494 if (sscanf(value, "%lf", &v) != 1) { | |
495 return false; | |
496 } | |
497 | |
498 if (CommandLineFlags::doubleAtPut(name, &v, origin)) { | |
499 return true; | |
500 } | |
501 return false; | |
502 } | |
503 | |
504 | |
505 static bool set_numeric_flag(char* name, char* value, FlagValueOrigin origin) { | |
506 jlong v; | |
507 intx intx_v; | |
508 bool is_neg = false; | |
509 // Check the sign first since atomll() parses only unsigned values. | |
510 if (*value == '-') { | |
511 if (!CommandLineFlags::intxAt(name, &intx_v)) { | |
512 return false; | |
513 } | |
514 value++; | |
515 is_neg = true; | |
516 } | |
517 if (!atomll(value, &v)) { | |
518 return false; | |
519 } | |
520 intx_v = (intx) v; | |
521 if (is_neg) { | |
522 intx_v = -intx_v; | |
523 } | |
524 if (CommandLineFlags::intxAtPut(name, &intx_v, origin)) { | |
525 return true; | |
526 } | |
527 uintx uintx_v = (uintx) v; | |
528 if (!is_neg && CommandLineFlags::uintxAtPut(name, &uintx_v, origin)) { | |
529 return true; | |
530 } | |
531 return false; | |
532 } | |
533 | |
534 | |
535 static bool set_string_flag(char* name, const char* value, FlagValueOrigin origin) { | |
536 if (!CommandLineFlags::ccstrAtPut(name, &value, origin)) return false; | |
537 // Contract: CommandLineFlags always returns a pointer that needs freeing. | |
538 FREE_C_HEAP_ARRAY(char, value); | |
539 return true; | |
540 } | |
541 | |
542 static bool append_to_string_flag(char* name, const char* new_value, FlagValueOrigin origin) { | |
543 const char* old_value = ""; | |
544 if (!CommandLineFlags::ccstrAt(name, &old_value)) return false; | |
545 size_t old_len = old_value != NULL ? strlen(old_value) : 0; | |
546 size_t new_len = strlen(new_value); | |
547 const char* value; | |
548 char* free_this_too = NULL; | |
549 if (old_len == 0) { | |
550 value = new_value; | |
551 } else if (new_len == 0) { | |
552 value = old_value; | |
553 } else { | |
554 char* buf = NEW_C_HEAP_ARRAY(char, old_len + 1 + new_len + 1); | |
555 // each new setting adds another LINE to the switch: | |
556 sprintf(buf, "%s\n%s", old_value, new_value); | |
557 value = buf; | |
558 free_this_too = buf; | |
559 } | |
560 (void) CommandLineFlags::ccstrAtPut(name, &value, origin); | |
561 // CommandLineFlags always returns a pointer that needs freeing. | |
562 FREE_C_HEAP_ARRAY(char, value); | |
563 if (free_this_too != NULL) { | |
564 // CommandLineFlags made its own copy, so I must delete my own temp. buffer. | |
565 FREE_C_HEAP_ARRAY(char, free_this_too); | |
566 } | |
567 return true; | |
568 } | |
569 | |
570 | |
571 bool Arguments::parse_argument(const char* arg, FlagValueOrigin origin) { | |
572 | |
573 // range of acceptable characters spelled out for portability reasons | |
574 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]" | |
575 #define BUFLEN 255 | |
576 char name[BUFLEN+1]; | |
577 char dummy; | |
578 | |
579 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { | |
580 return set_bool_flag(name, false, origin); | |
581 } | |
582 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { | |
583 return set_bool_flag(name, true, origin); | |
584 } | |
585 | |
586 char punct; | |
587 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') { | |
588 const char* value = strchr(arg, '=') + 1; | |
589 Flag* flag = Flag::find_flag(name, strlen(name)); | |
590 if (flag != NULL && flag->is_ccstr()) { | |
591 if (flag->ccstr_accumulates()) { | |
592 return append_to_string_flag(name, value, origin); | |
593 } else { | |
594 if (value[0] == '\0') { | |
595 value = NULL; | |
596 } | |
597 return set_string_flag(name, value, origin); | |
598 } | |
599 } | |
600 } | |
601 | |
602 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') { | |
603 const char* value = strchr(arg, '=') + 1; | |
604 // -XX:Foo:=xxx will reset the string flag to the given value. | |
605 if (value[0] == '\0') { | |
606 value = NULL; | |
607 } | |
608 return set_string_flag(name, value, origin); | |
609 } | |
610 | |
611 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.]" | |
612 #define SIGNED_NUMBER_RANGE "[-0123456789]" | |
613 #define NUMBER_RANGE "[0123456789]" | |
614 char value[BUFLEN + 1]; | |
615 char value2[BUFLEN + 1]; | |
616 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) { | |
617 // Looks like a floating-point number -- try again with more lenient format string | |
618 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) { | |
619 return set_fp_numeric_flag(name, value, origin); | |
620 } | |
621 } | |
622 | |
623 #define VALUE_RANGE "[-kmgtKMGT0123456789]" | |
624 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) { | |
625 return set_numeric_flag(name, value, origin); | |
626 } | |
627 | |
628 return false; | |
629 } | |
630 | |
631 | |
632 void Arguments::add_string(char*** bldarray, int* count, const char* arg) { | |
633 assert(bldarray != NULL, "illegal argument"); | |
634 | |
635 if (arg == NULL) { | |
636 return; | |
637 } | |
638 | |
639 int index = *count; | |
640 | |
641 // expand the array and add arg to the last element | |
642 (*count)++; | |
643 if (*bldarray == NULL) { | |
644 *bldarray = NEW_C_HEAP_ARRAY(char*, *count); | |
645 } else { | |
646 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, *count); | |
647 } | |
648 (*bldarray)[index] = strdup(arg); | |
649 } | |
650 | |
651 void Arguments::build_jvm_args(const char* arg) { | |
652 add_string(&_jvm_args_array, &_num_jvm_args, arg); | |
653 } | |
654 | |
655 void Arguments::build_jvm_flags(const char* arg) { | |
656 add_string(&_jvm_flags_array, &_num_jvm_flags, arg); | |
657 } | |
658 | |
659 // utility function to return a string that concatenates all | |
660 // strings in a given char** array | |
661 const char* Arguments::build_resource_string(char** args, int count) { | |
662 if (args == NULL || count == 0) { | |
663 return NULL; | |
664 } | |
665 size_t length = strlen(args[0]) + 1; // add 1 for the null terminator | |
666 for (int i = 1; i < count; i++) { | |
667 length += strlen(args[i]) + 1; // add 1 for a space | |
668 } | |
669 char* s = NEW_RESOURCE_ARRAY(char, length); | |
670 strcpy(s, args[0]); | |
671 for (int j = 1; j < count; j++) { | |
672 strcat(s, " "); | |
673 strcat(s, args[j]); | |
674 } | |
675 return (const char*) s; | |
676 } | |
677 | |
678 void Arguments::print_on(outputStream* st) { | |
679 st->print_cr("VM Arguments:"); | |
680 if (num_jvm_flags() > 0) { | |
681 st->print("jvm_flags: "); print_jvm_flags_on(st); | |
682 } | |
683 if (num_jvm_args() > 0) { | |
684 st->print("jvm_args: "); print_jvm_args_on(st); | |
685 } | |
686 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>"); | |
687 st->print_cr("Launcher Type: %s", _sun_java_launcher); | |
688 } | |
689 | |
690 void Arguments::print_jvm_flags_on(outputStream* st) { | |
691 if (_num_jvm_flags > 0) { | |
692 for (int i=0; i < _num_jvm_flags; i++) { | |
693 st->print("%s ", _jvm_flags_array[i]); | |
694 } | |
695 st->print_cr(""); | |
696 } | |
697 } | |
698 | |
699 void Arguments::print_jvm_args_on(outputStream* st) { | |
700 if (_num_jvm_args > 0) { | |
701 for (int i=0; i < _num_jvm_args; i++) { | |
702 st->print("%s ", _jvm_args_array[i]); | |
703 } | |
704 st->print_cr(""); | |
705 } | |
706 } | |
707 | |
708 bool Arguments::process_argument(const char* arg, jboolean ignore_unrecognized, FlagValueOrigin origin) { | |
709 | |
710 if (parse_argument(arg, origin)) { | |
711 // do nothing | |
712 } else if (made_obsolete_in_1_5_0(arg)) { | |
713 jio_fprintf(defaultStream::error_stream(), | |
714 "Warning: The flag %s has been EOL'd as of 1.5.0 and will" | |
715 " be ignored\n", arg); | |
716 } else { | |
717 if (!ignore_unrecognized) { | |
718 jio_fprintf(defaultStream::error_stream(), | |
719 "Unrecognized VM option '%s'\n", arg); | |
720 // allow for commandline "commenting out" options like -XX:#+Verbose | |
721 if (strlen(arg) == 0 || arg[0] != '#') { | |
722 return false; | |
723 } | |
724 } | |
725 } | |
726 return true; | |
727 } | |
728 | |
729 | |
730 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) { | |
731 FILE* stream = fopen(file_name, "rb"); | |
732 if (stream == NULL) { | |
733 if (should_exist) { | |
734 jio_fprintf(defaultStream::error_stream(), | |
735 "Could not open settings file %s\n", file_name); | |
736 return false; | |
737 } else { | |
738 return true; | |
739 } | |
740 } | |
741 | |
742 char token[1024]; | |
743 int pos = 0; | |
744 | |
745 bool in_white_space = true; | |
746 bool in_comment = false; | |
747 bool in_quote = false; | |
748 char quote_c = 0; | |
749 bool result = true; | |
750 | |
751 int c = getc(stream); | |
752 while(c != EOF) { | |
753 if (in_white_space) { | |
754 if (in_comment) { | |
755 if (c == '\n') in_comment = false; | |
756 } else { | |
757 if (c == '#') in_comment = true; | |
758 else if (!isspace(c)) { | |
759 in_white_space = false; | |
760 token[pos++] = c; | |
761 } | |
762 } | |
763 } else { | |
764 if (c == '\n' || (!in_quote && isspace(c))) { | |
765 // token ends at newline, or at unquoted whitespace | |
766 // this allows a way to include spaces in string-valued options | |
767 token[pos] = '\0'; | |
768 logOption(token); | |
769 result &= process_argument(token, ignore_unrecognized, CONFIG_FILE); | |
770 build_jvm_flags(token); | |
771 pos = 0; | |
772 in_white_space = true; | |
773 in_quote = false; | |
774 } else if (!in_quote && (c == '\'' || c == '"')) { | |
775 in_quote = true; | |
776 quote_c = c; | |
777 } else if (in_quote && (c == quote_c)) { | |
778 in_quote = false; | |
779 } else { | |
780 token[pos++] = c; | |
781 } | |
782 } | |
783 c = getc(stream); | |
784 } | |
785 if (pos > 0) { | |
786 token[pos] = '\0'; | |
787 result &= process_argument(token, ignore_unrecognized, CONFIG_FILE); | |
788 build_jvm_flags(token); | |
789 } | |
790 fclose(stream); | |
791 return result; | |
792 } | |
793 | |
794 //============================================================================================================= | |
795 // Parsing of properties (-D) | |
796 | |
797 const char* Arguments::get_property(const char* key) { | |
798 return PropertyList_get_value(system_properties(), key); | |
799 } | |
800 | |
801 bool Arguments::add_property(const char* prop) { | |
802 const char* eq = strchr(prop, '='); | |
803 char* key; | |
804 // ns must be static--its address may be stored in a SystemProperty object. | |
805 const static char ns[1] = {0}; | |
806 char* value = (char *)ns; | |
807 | |
808 size_t key_len = (eq == NULL) ? strlen(prop) : (eq - prop); | |
809 key = AllocateHeap(key_len + 1, "add_property"); | |
810 strncpy(key, prop, key_len); | |
811 key[key_len] = '\0'; | |
812 | |
813 if (eq != NULL) { | |
814 size_t value_len = strlen(prop) - key_len - 1; | |
815 value = AllocateHeap(value_len + 1, "add_property"); | |
816 strncpy(value, &prop[key_len + 1], value_len + 1); | |
817 } | |
818 | |
819 if (strcmp(key, "java.compiler") == 0) { | |
820 process_java_compiler_argument(value); | |
821 FreeHeap(key); | |
822 if (eq != NULL) { | |
823 FreeHeap(value); | |
824 } | |
825 return true; | |
826 } | |
827 else if (strcmp(key, "sun.java.command") == 0) { | |
828 | |
829 _java_command = value; | |
830 | |
831 // don't add this property to the properties exposed to the java application | |
832 FreeHeap(key); | |
833 return true; | |
834 } | |
835 else if (strcmp(key, "sun.java.launcher.pid") == 0) { | |
836 // launcher.pid property is private and is processed | |
837 // in process_sun_java_launcher_properties(); | |
838 // the sun.java.launcher property is passed on to the java application | |
839 FreeHeap(key); | |
840 if (eq != NULL) { | |
841 FreeHeap(value); | |
842 } | |
843 return true; | |
844 } | |
845 else if (strcmp(key, "java.vendor.url.bug") == 0) { | |
846 // save it in _java_vendor_url_bug, so JVM fatal error handler can access | |
847 // its value without going through the property list or making a Java call. | |
848 _java_vendor_url_bug = value; | |
849 } | |
850 | |
851 // Create new property and add at the end of the list | |
852 PropertyList_unique_add(&_system_properties, key, value); | |
853 return true; | |
854 } | |
855 | |
856 //=========================================================================================================== | |
857 // Setting int/mixed/comp mode flags | |
858 | |
859 void Arguments::set_mode_flags(Mode mode) { | |
860 // Set up default values for all flags. | |
861 // If you add a flag to any of the branches below, | |
862 // add a default value for it here. | |
863 set_java_compiler(false); | |
864 _mode = mode; | |
865 | |
866 // Ensure Agent_OnLoad has the correct initial values. | |
867 // This may not be the final mode; mode may change later in onload phase. | |
868 PropertyList_unique_add(&_system_properties, "java.vm.info", | |
869 (char*)Abstract_VM_Version::vm_info_string()); | |
870 | |
871 UseInterpreter = true; | |
872 UseCompiler = true; | |
873 UseLoopCounter = true; | |
874 | |
875 // Default values may be platform/compiler dependent - | |
876 // use the saved values | |
877 ClipInlining = Arguments::_ClipInlining; | |
878 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods; | |
879 UseOnStackReplacement = Arguments::_UseOnStackReplacement; | |
880 BackgroundCompilation = Arguments::_BackgroundCompilation; | |
881 Tier2CompileThreshold = Arguments::_Tier2CompileThreshold; | |
882 | |
883 // Change from defaults based on mode | |
884 switch (mode) { | |
885 default: | |
886 ShouldNotReachHere(); | |
887 break; | |
888 case _int: | |
889 UseCompiler = false; | |
890 UseLoopCounter = false; | |
891 AlwaysCompileLoopMethods = false; | |
892 UseOnStackReplacement = false; | |
893 break; | |
894 case _mixed: | |
895 // same as default | |
896 break; | |
897 case _comp: | |
898 UseInterpreter = false; | |
899 BackgroundCompilation = false; | |
900 ClipInlining = false; | |
901 break; | |
902 } | |
903 } | |
904 | |
905 | |
906 // Conflict: required to use shared spaces (-Xshare:on), but | |
907 // incompatible command line options were chosen. | |
908 | |
909 static void no_shared_spaces() { | |
910 if (RequireSharedSpaces) { | |
911 jio_fprintf(defaultStream::error_stream(), | |
912 "Class data sharing is inconsistent with other specified options.\n"); | |
913 vm_exit_during_initialization("Unable to use shared archive.", NULL); | |
914 } else { | |
915 FLAG_SET_DEFAULT(UseSharedSpaces, false); | |
916 } | |
917 } | |
918 | |
919 | |
920 // If the user has chosen ParallelGCThreads > 0, we set UseParNewGC | |
921 // if it's not explictly set or unset. If the user has chosen | |
922 // UseParNewGC and not explicitly set ParallelGCThreads we | |
923 // set it, unless this is a single cpu machine. | |
924 void Arguments::set_parnew_gc_flags() { | |
925 assert(!UseSerialGC && !UseParallelGC, "control point invariant"); | |
926 | |
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927 // Turn off AdaptiveSizePolicy by default for parnew until it is |
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928 // complete. |
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929 if (UseParNewGC && |
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930 FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) { |
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931 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); |
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932 } |
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933 |
0 | 934 if (FLAG_IS_DEFAULT(UseParNewGC) && ParallelGCThreads > 1) { |
935 FLAG_SET_DEFAULT(UseParNewGC, true); | |
936 } else if (UseParNewGC && ParallelGCThreads == 0) { | |
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937 FLAG_SET_DEFAULT(ParallelGCThreads, |
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938 Abstract_VM_Version::parallel_worker_threads()); |
0 | 939 if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) { |
940 FLAG_SET_DEFAULT(UseParNewGC, false); | |
941 } | |
942 } | |
943 if (!UseParNewGC) { | |
944 FLAG_SET_DEFAULT(ParallelGCThreads, 0); | |
945 } else { | |
946 no_shared_spaces(); | |
947 | |
948 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 correspondinly, | |
949 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration | |
950 // we set them to 1024 and 1024. | |
951 // See CR 6362902. | |
952 if (FLAG_IS_DEFAULT(YoungPLABSize)) { | |
953 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024); | |
954 } | |
955 if (FLAG_IS_DEFAULT(OldPLABSize)) { | |
956 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024); | |
957 } | |
958 | |
959 // AlwaysTenure flag should make ParNew to promote all at first collection. | |
960 // See CR 6362902. | |
961 if (AlwaysTenure) { | |
962 FLAG_SET_CMDLINE(intx, MaxTenuringThreshold, 0); | |
963 } | |
964 } | |
965 } | |
966 | |
967 // Adjust some sizes to suit CMS and/or ParNew needs; these work well on | |
968 // sparc/solaris for certain applications, but would gain from | |
969 // further optimization and tuning efforts, and would almost | |
970 // certainly gain from analysis of platform and environment. | |
971 void Arguments::set_cms_and_parnew_gc_flags() { | |
972 if (UseSerialGC || UseParallelGC) { | |
973 return; | |
974 } | |
975 | |
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976 assert(UseConcMarkSweepGC, "CMS is expected to be on here"); |
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977 |
0 | 978 // If we are using CMS, we prefer to UseParNewGC, |
979 // unless explicitly forbidden. | |
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980 if (!UseParNewGC && FLAG_IS_DEFAULT(UseParNewGC)) { |
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981 FLAG_SET_ERGO(bool, UseParNewGC, true); |
0 | 982 } |
983 | |
984 // Turn off AdaptiveSizePolicy by default for cms until it is | |
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985 // complete. |
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986 if (FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) { |
0 | 987 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); |
988 } | |
989 | |
990 // In either case, adjust ParallelGCThreads and/or UseParNewGC | |
991 // as needed. | |
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992 if (UseParNewGC) { |
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993 set_parnew_gc_flags(); |
0 | 994 } |
995 | |
996 // Now make adjustments for CMS | |
997 size_t young_gen_per_worker; | |
998 intx new_ratio; | |
999 size_t min_new_default; | |
1000 intx tenuring_default; | |
1001 if (CMSUseOldDefaults) { // old defaults: "old" as of 6.0 | |
1002 if FLAG_IS_DEFAULT(CMSYoungGenPerWorker) { | |
1003 FLAG_SET_DEFAULT(CMSYoungGenPerWorker, 4*M); | |
1004 } | |
1005 young_gen_per_worker = 4*M; | |
1006 new_ratio = (intx)15; | |
1007 min_new_default = 4*M; | |
1008 tenuring_default = (intx)0; | |
1009 } else { // new defaults: "new" as of 6.0 | |
1010 young_gen_per_worker = CMSYoungGenPerWorker; | |
1011 new_ratio = (intx)7; | |
1012 min_new_default = 16*M; | |
1013 tenuring_default = (intx)4; | |
1014 } | |
1015 | |
1016 // Preferred young gen size for "short" pauses | |
1017 const uintx parallel_gc_threads = | |
1018 (ParallelGCThreads == 0 ? 1 : ParallelGCThreads); | |
1019 const size_t preferred_max_new_size_unaligned = | |
1020 ScaleForWordSize(young_gen_per_worker * parallel_gc_threads); | |
1021 const size_t preferred_max_new_size = | |
1022 align_size_up(preferred_max_new_size_unaligned, os::vm_page_size()); | |
1023 | |
1024 // Unless explicitly requested otherwise, size young gen | |
1025 // for "short" pauses ~ 4M*ParallelGCThreads | |
1026 if (FLAG_IS_DEFAULT(MaxNewSize)) { // MaxNewSize not set at command-line | |
1027 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line | |
1028 FLAG_SET_DEFAULT(MaxNewSize, MAX2(NewSize, preferred_max_new_size)); | |
1029 } else { | |
1030 FLAG_SET_DEFAULT(MaxNewSize, preferred_max_new_size); | |
1031 } | |
1032 } | |
1033 // Unless explicitly requested otherwise, prefer a large | |
1034 // Old to Young gen size so as to shift the collection load | |
1035 // to the old generation concurrent collector | |
1036 if (FLAG_IS_DEFAULT(NewRatio)) { | |
1037 FLAG_SET_DEFAULT(NewRatio, MAX2(NewRatio, new_ratio)); | |
1038 | |
1039 size_t min_new = align_size_up(ScaleForWordSize(min_new_default), os::vm_page_size()); | |
1040 size_t prev_initial_size = initial_heap_size(); | |
1041 if (prev_initial_size != 0 && prev_initial_size < min_new+OldSize) { | |
1042 set_initial_heap_size(min_new+OldSize); | |
1043 // Currently minimum size and the initial heap sizes are the same. | |
1044 set_min_heap_size(initial_heap_size()); | |
1045 if (PrintGCDetails && Verbose) { | |
1046 warning("Initial heap size increased to " SIZE_FORMAT " M from " | |
1047 SIZE_FORMAT " M; use -XX:NewSize=... for finer control.", | |
1048 initial_heap_size()/M, prev_initial_size/M); | |
1049 } | |
1050 } | |
1051 // MaxHeapSize is aligned down in collectorPolicy | |
1052 size_t max_heap = align_size_down(MaxHeapSize, | |
1053 CardTableRS::ct_max_alignment_constraint()); | |
1054 | |
1055 if (max_heap > min_new) { | |
1056 // Unless explicitly requested otherwise, make young gen | |
1057 // at least min_new, and at most preferred_max_new_size. | |
1058 if (FLAG_IS_DEFAULT(NewSize)) { | |
1059 FLAG_SET_DEFAULT(NewSize, MAX2(NewSize, min_new)); | |
1060 FLAG_SET_DEFAULT(NewSize, MIN2(preferred_max_new_size, NewSize)); | |
1061 } | |
1062 // Unless explicitly requested otherwise, size old gen | |
1063 // so that it's at least 3X of NewSize to begin with; | |
1064 // later NewRatio will decide how it grows; see above. | |
1065 if (FLAG_IS_DEFAULT(OldSize)) { | |
1066 if (max_heap > NewSize) { | |
1067 FLAG_SET_DEFAULT(OldSize, MIN2(3*NewSize, max_heap - NewSize)); | |
1068 } | |
1069 } | |
1070 } | |
1071 } | |
1072 // Unless explicitly requested otherwise, definitely | |
1073 // promote all objects surviving "tenuring_default" scavenges. | |
1074 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) && | |
1075 FLAG_IS_DEFAULT(SurvivorRatio)) { | |
1076 FLAG_SET_DEFAULT(MaxTenuringThreshold, tenuring_default); | |
1077 } | |
1078 // If we decided above (or user explicitly requested) | |
1079 // `promote all' (via MaxTenuringThreshold := 0), | |
1080 // prefer minuscule survivor spaces so as not to waste | |
1081 // space for (non-existent) survivors | |
1082 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) { | |
1083 FLAG_SET_DEFAULT(SurvivorRatio, MAX2((intx)1024, SurvivorRatio)); | |
1084 } | |
1085 // If OldPLABSize is set and CMSParPromoteBlocksToClaim is not, | |
1086 // set CMSParPromoteBlocksToClaim equal to OldPLABSize. | |
1087 // This is done in order to make ParNew+CMS configuration to work | |
1088 // with YoungPLABSize and OldPLABSize options. | |
1089 // See CR 6362902. | |
1090 if (!FLAG_IS_DEFAULT(OldPLABSize)) { | |
1091 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) { | |
1092 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, OldPLABSize); | |
1093 } | |
1094 else { | |
1095 // OldPLABSize and CMSParPromoteBlocksToClaim are both set. | |
1096 // CMSParPromoteBlocksToClaim is a collector-specific flag, so | |
1097 // we'll let it to take precedence. | |
1098 jio_fprintf(defaultStream::error_stream(), | |
1099 "Both OldPLABSize and CMSParPromoteBlocksToClaim options are specified " | |
1100 "for the CMS collector. CMSParPromoteBlocksToClaim will take precedence.\n"); | |
1101 } | |
1102 } | |
1103 } | |
1104 | |
1105 bool Arguments::should_auto_select_low_pause_collector() { | |
1106 if (UseAutoGCSelectPolicy && | |
1107 !FLAG_IS_DEFAULT(MaxGCPauseMillis) && | |
1108 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) { | |
1109 if (PrintGCDetails) { | |
1110 // Cannot use gclog_or_tty yet. | |
1111 tty->print_cr("Automatic selection of the low pause collector" | |
1112 " based on pause goal of %d (ms)", MaxGCPauseMillis); | |
1113 } | |
1114 return true; | |
1115 } | |
1116 return false; | |
1117 } | |
1118 | |
1119 void Arguments::set_ergonomics_flags() { | |
1120 // Parallel GC is not compatible with sharing. If one specifies | |
1121 // that they want sharing explicitly, do not set ergonmics flags. | |
1122 if (DumpSharedSpaces || ForceSharedSpaces) { | |
1123 return; | |
1124 } | |
1125 | |
1126 if (os::is_server_class_machine() && !force_client_mode ) { | |
1127 // If no other collector is requested explicitly, | |
1128 // let the VM select the collector based on | |
1129 // machine class and automatic selection policy. | |
1130 if (!UseSerialGC && | |
1131 !UseConcMarkSweepGC && | |
1132 !UseParNewGC && | |
1133 !DumpSharedSpaces && | |
1134 FLAG_IS_DEFAULT(UseParallelGC)) { | |
1135 if (should_auto_select_low_pause_collector()) { | |
1136 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true); | |
1137 } else { | |
1138 FLAG_SET_ERGO(bool, UseParallelGC, true); | |
1139 } | |
1140 no_shared_spaces(); | |
1141 } | |
1142 } | |
1143 } | |
1144 | |
1145 void Arguments::set_parallel_gc_flags() { | |
1146 // If parallel old was requested, automatically enable parallel scavenge. | |
1147 if (UseParallelOldGC && !UseParallelGC && FLAG_IS_DEFAULT(UseParallelGC)) { | |
1148 FLAG_SET_DEFAULT(UseParallelGC, true); | |
1149 } | |
1150 | |
1151 // If no heap maximum was requested explicitly, use some reasonable fraction | |
1152 // of the physical memory, up to a maximum of 1GB. | |
1153 if (UseParallelGC) { | |
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1154 FLAG_SET_ERGO(uintx, ParallelGCThreads, |
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1155 Abstract_VM_Version::parallel_worker_threads()); |
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1156 |
0 | 1157 if (FLAG_IS_DEFAULT(MaxHeapSize)) { |
1158 const uint64_t reasonable_fraction = | |
1159 os::physical_memory() / DefaultMaxRAMFraction; | |
1160 const uint64_t maximum_size = (uint64_t) DefaultMaxRAM; | |
1161 size_t reasonable_max = | |
1162 (size_t) os::allocatable_physical_memory(reasonable_fraction); | |
1163 if (reasonable_max > maximum_size) { | |
1164 reasonable_max = maximum_size; | |
1165 } | |
1166 if (PrintGCDetails && Verbose) { | |
1167 // Cannot use gclog_or_tty yet. | |
1168 tty->print_cr(" Max heap size for server class platform " | |
1169 SIZE_FORMAT, reasonable_max); | |
1170 } | |
1171 // If the initial_heap_size has not been set with -Xms, | |
1172 // then set it as fraction of size of physical memory | |
1173 // respecting the maximum and minimum sizes of the heap. | |
1174 if (initial_heap_size() == 0) { | |
1175 const uint64_t reasonable_initial_fraction = | |
1176 os::physical_memory() / DefaultInitialRAMFraction; | |
1177 const size_t reasonable_initial = | |
1178 (size_t) os::allocatable_physical_memory(reasonable_initial_fraction); | |
1179 const size_t minimum_size = NewSize + OldSize; | |
1180 set_initial_heap_size(MAX2(MIN2(reasonable_initial, reasonable_max), | |
1181 minimum_size)); | |
1182 // Currently the minimum size and the initial heap sizes are the same. | |
1183 set_min_heap_size(initial_heap_size()); | |
1184 if (PrintGCDetails && Verbose) { | |
1185 // Cannot use gclog_or_tty yet. | |
1186 tty->print_cr(" Initial heap size for server class platform " | |
1187 SIZE_FORMAT, initial_heap_size()); | |
1188 } | |
1189 } else { | |
1190 // An minimum size was specified on the command line. Be sure | |
1191 // that the maximum size is consistent. | |
1192 if (initial_heap_size() > reasonable_max) { | |
1193 reasonable_max = initial_heap_size(); | |
1194 } | |
1195 } | |
1196 FLAG_SET_ERGO(uintx, MaxHeapSize, (uintx) reasonable_max); | |
1197 } | |
1198 | |
1199 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the | |
1200 // SurvivorRatio has been set, reset their default values to SurvivorRatio + | |
1201 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger. | |
1202 // See CR 6362902 for details. | |
1203 if (!FLAG_IS_DEFAULT(SurvivorRatio)) { | |
1204 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) { | |
1205 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2); | |
1206 } | |
1207 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) { | |
1208 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2); | |
1209 } | |
1210 } | |
1211 | |
1212 if (UseParallelOldGC) { | |
1213 // Par compact uses lower default values since they are treated as | |
1214 // minimums. | |
1215 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) { | |
1216 MarkSweepDeadRatio = 1; | |
1217 } | |
1218 if (FLAG_IS_DEFAULT(PermMarkSweepDeadRatio)) { | |
1219 PermMarkSweepDeadRatio = 5; | |
1220 } | |
1221 } | |
1222 } | |
1223 } | |
1224 | |
1225 // This must be called after ergonomics because we want bytecode rewriting | |
1226 // if the server compiler is used, or if UseSharedSpaces is disabled. | |
1227 void Arguments::set_bytecode_flags() { | |
1228 // Better not attempt to store into a read-only space. | |
1229 if (UseSharedSpaces) { | |
1230 FLAG_SET_DEFAULT(RewriteBytecodes, false); | |
1231 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); | |
1232 } | |
1233 | |
1234 if (!RewriteBytecodes) { | |
1235 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); | |
1236 } | |
1237 } | |
1238 | |
1239 // Aggressive optimization flags -XX:+AggressiveOpts | |
1240 void Arguments::set_aggressive_opts_flags() { | |
1241 if (AggressiveOpts) { | |
1242 NOT_WINDOWS( | |
1243 // No measured benefit on Windows | |
1244 if (FLAG_IS_DEFAULT(CacheTimeMillis)) { | |
1245 FLAG_SET_DEFAULT(CacheTimeMillis, true); | |
1246 } | |
1247 ) | |
1248 } | |
1249 } | |
1250 | |
1251 //=========================================================================================================== | |
1252 // Parsing of java.compiler property | |
1253 | |
1254 void Arguments::process_java_compiler_argument(char* arg) { | |
1255 // For backwards compatibility, Djava.compiler=NONE or "" | |
1256 // causes us to switch to -Xint mode UNLESS -Xdebug | |
1257 // is also specified. | |
1258 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) { | |
1259 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen. | |
1260 } | |
1261 } | |
1262 | |
1263 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) { | |
1264 _sun_java_launcher = strdup(launcher); | |
1265 } | |
1266 | |
1267 bool Arguments::created_by_java_launcher() { | |
1268 assert(_sun_java_launcher != NULL, "property must have value"); | |
1269 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0; | |
1270 } | |
1271 | |
1272 //=========================================================================================================== | |
1273 // Parsing of main arguments | |
1274 | |
1275 bool Arguments::verify_percentage(uintx value, const char* name) { | |
1276 if (value <= 100) { | |
1277 return true; | |
1278 } | |
1279 jio_fprintf(defaultStream::error_stream(), | |
1280 "%s of " UINTX_FORMAT " is invalid; must be between 0 and 100\n", | |
1281 name, value); | |
1282 return false; | |
1283 } | |
1284 | |
1285 static void set_serial_gc_flags() { | |
1286 FLAG_SET_DEFAULT(UseSerialGC, true); | |
1287 FLAG_SET_DEFAULT(UseParNewGC, false); | |
1288 FLAG_SET_DEFAULT(UseConcMarkSweepGC, false); | |
1289 FLAG_SET_DEFAULT(UseParallelGC, false); | |
1290 FLAG_SET_DEFAULT(UseParallelOldGC, false); | |
1291 } | |
1292 | |
1293 static bool verify_serial_gc_flags() { | |
1294 return (UseSerialGC && | |
1295 !(UseParNewGC || UseConcMarkSweepGC || UseParallelGC || | |
1296 UseParallelOldGC)); | |
1297 } | |
1298 | |
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1299 // Check consistency of GC selection |
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1300 bool Arguments::check_gc_consistency() { |
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1301 bool status = true; |
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1302 // Ensure that the user has not selected conflicting sets |
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1303 // of collectors. [Note: this check is merely a user convenience; |
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1304 // collectors over-ride each other so that only a non-conflicting |
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1305 // set is selected; however what the user gets is not what they |
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1306 // may have expected from the combination they asked for. It's |
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1307 // better to reduce user confusion by not allowing them to |
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1308 // select conflicting combinations. |
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1309 uint i = 0; |
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1310 if (UseSerialGC) i++; |
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1311 if (UseConcMarkSweepGC || UseParNewGC) i++; |
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1312 if (UseParallelGC || UseParallelOldGC) i++; |
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1313 if (i > 1) { |
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1314 jio_fprintf(defaultStream::error_stream(), |
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1315 "Conflicting collector combinations in option list; " |
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1316 "please refer to the release notes for the combinations " |
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1317 "allowed\n"); |
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1318 status = false; |
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1319 } |
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1320 |
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1321 return status; |
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1322 } |
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1323 |
0 | 1324 // Check the consistency of vm_init_args |
1325 bool Arguments::check_vm_args_consistency() { | |
1326 // Method for adding checks for flag consistency. | |
1327 // The intent is to warn the user of all possible conflicts, | |
1328 // before returning an error. | |
1329 // Note: Needs platform-dependent factoring. | |
1330 bool status = true; | |
1331 | |
1332 #if ( (defined(COMPILER2) && defined(SPARC))) | |
1333 // NOTE: The call to VM_Version_init depends on the fact that VM_Version_init | |
1334 // on sparc doesn't require generation of a stub as is the case on, e.g., | |
1335 // x86. Normally, VM_Version_init must be called from init_globals in | |
1336 // init.cpp, which is called by the initial java thread *after* arguments | |
1337 // have been parsed. VM_Version_init gets called twice on sparc. | |
1338 extern void VM_Version_init(); | |
1339 VM_Version_init(); | |
1340 if (!VM_Version::has_v9()) { | |
1341 jio_fprintf(defaultStream::error_stream(), | |
1342 "V8 Machine detected, Server requires V9\n"); | |
1343 status = false; | |
1344 } | |
1345 #endif /* COMPILER2 && SPARC */ | |
1346 | |
1347 // Allow both -XX:-UseStackBanging and -XX:-UseBoundThreads in non-product | |
1348 // builds so the cost of stack banging can be measured. | |
1349 #if (defined(PRODUCT) && defined(SOLARIS)) | |
1350 if (!UseBoundThreads && !UseStackBanging) { | |
1351 jio_fprintf(defaultStream::error_stream(), | |
1352 "-UseStackBanging conflicts with -UseBoundThreads\n"); | |
1353 | |
1354 status = false; | |
1355 } | |
1356 #endif | |
1357 | |
1358 if (TLABRefillWasteFraction == 0) { | |
1359 jio_fprintf(defaultStream::error_stream(), | |
1360 "TLABRefillWasteFraction should be a denominator, " | |
1361 "not " SIZE_FORMAT "\n", | |
1362 TLABRefillWasteFraction); | |
1363 status = false; | |
1364 } | |
1365 | |
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1366 status = status && verify_percentage(MaxLiveObjectEvacuationRatio, |
0 | 1367 "MaxLiveObjectEvacuationRatio"); |
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1368 status = status && verify_percentage(AdaptiveSizePolicyWeight, |
0 | 1369 "AdaptiveSizePolicyWeight"); |
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1370 status = status && verify_percentage(AdaptivePermSizeWeight, "AdaptivePermSizeWeight"); |
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1371 status = status && verify_percentage(ThresholdTolerance, "ThresholdTolerance"); |
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1372 status = status && verify_percentage(MinHeapFreeRatio, "MinHeapFreeRatio"); |
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1373 status = status && verify_percentage(MaxHeapFreeRatio, "MaxHeapFreeRatio"); |
0 | 1374 |
1375 if (MinHeapFreeRatio > MaxHeapFreeRatio) { | |
1376 jio_fprintf(defaultStream::error_stream(), | |
1377 "MinHeapFreeRatio (" UINTX_FORMAT ") must be less than or " | |
1378 "equal to MaxHeapFreeRatio (" UINTX_FORMAT ")\n", | |
1379 MinHeapFreeRatio, MaxHeapFreeRatio); | |
1380 status = false; | |
1381 } | |
1382 // Keeping the heap 100% free is hard ;-) so limit it to 99%. | |
1383 MinHeapFreeRatio = MIN2(MinHeapFreeRatio, (uintx) 99); | |
1384 | |
1385 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) { | |
1386 MarkSweepAlwaysCompactCount = 1; // Move objects every gc. | |
1387 } | |
1388 | |
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1389 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); |
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1390 status = status && verify_percentage(GCTimeLimit, "GCTimeLimit"); |
0 | 1391 if (GCTimeLimit == 100) { |
1392 // Turn off gc-overhead-limit-exceeded checks | |
1393 FLAG_SET_DEFAULT(UseGCOverheadLimit, false); | |
1394 } | |
1395 | |
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1396 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); |
0 | 1397 |
1398 // Check user specified sharing option conflict with Parallel GC | |
1399 bool cannot_share = (UseConcMarkSweepGC || UseParallelGC || | |
1400 UseParallelOldGC || UseParNewGC || | |
1401 SOLARIS_ONLY(UseISM) NOT_SOLARIS(UseLargePages)); | |
1402 | |
1403 if (cannot_share) { | |
1404 // Either force sharing on by forcing the other options off, or | |
1405 // force sharing off. | |
1406 if (DumpSharedSpaces || ForceSharedSpaces) { | |
1407 set_serial_gc_flags(); | |
1408 FLAG_SET_DEFAULT(SOLARIS_ONLY(UseISM) NOT_SOLARIS(UseLargePages), false); | |
1409 } else { | |
1410 no_shared_spaces(); | |
1411 } | |
1412 } | |
1413 | |
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1414 status = status && check_gc_consistency(); |
0 | 1415 |
1416 if (_has_alloc_profile) { | |
1417 if (UseParallelGC || UseParallelOldGC) { | |
1418 jio_fprintf(defaultStream::error_stream(), | |
1419 "error: invalid argument combination.\n" | |
1420 "Allocation profiling (-Xaprof) cannot be used together with " | |
1421 "Parallel GC (-XX:+UseParallelGC or -XX:+UseParallelOldGC).\n"); | |
1422 status = false; | |
1423 } | |
1424 if (UseConcMarkSweepGC) { | |
1425 jio_fprintf(defaultStream::error_stream(), | |
1426 "error: invalid argument combination.\n" | |
1427 "Allocation profiling (-Xaprof) cannot be used together with " | |
1428 "the CMS collector (-XX:+UseConcMarkSweepGC).\n"); | |
1429 status = false; | |
1430 } | |
1431 } | |
1432 | |
1433 if (CMSIncrementalMode) { | |
1434 if (!UseConcMarkSweepGC) { | |
1435 jio_fprintf(defaultStream::error_stream(), | |
1436 "error: invalid argument combination.\n" | |
1437 "The CMS collector (-XX:+UseConcMarkSweepGC) must be " | |
1438 "selected in order\nto use CMSIncrementalMode.\n"); | |
1439 status = false; | |
1440 } else if (!UseTLAB) { | |
1441 jio_fprintf(defaultStream::error_stream(), | |
1442 "error: CMSIncrementalMode requires thread-local " | |
1443 "allocation buffers\n(-XX:+UseTLAB).\n"); | |
1444 status = false; | |
1445 } else { | |
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1446 status = status && verify_percentage(CMSIncrementalDutyCycle, |
0 | 1447 "CMSIncrementalDutyCycle"); |
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1448 status = status && verify_percentage(CMSIncrementalDutyCycleMin, |
0 | 1449 "CMSIncrementalDutyCycleMin"); |
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1450 status = status && verify_percentage(CMSIncrementalSafetyFactor, |
0 | 1451 "CMSIncrementalSafetyFactor"); |
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1452 status = status && verify_percentage(CMSIncrementalOffset, |
0 | 1453 "CMSIncrementalOffset"); |
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1454 status = status && verify_percentage(CMSExpAvgFactor, |
0 | 1455 "CMSExpAvgFactor"); |
1456 // If it was not set on the command line, set | |
1457 // CMSInitiatingOccupancyFraction to 1 so icms can initiate cycles early. | |
1458 if (CMSInitiatingOccupancyFraction < 0) { | |
1459 FLAG_SET_DEFAULT(CMSInitiatingOccupancyFraction, 1); | |
1460 } | |
1461 } | |
1462 } | |
1463 | |
1464 if (UseNUMA && !UseTLAB) { | |
1465 jio_fprintf(defaultStream::error_stream(), | |
1466 "error: NUMA allocator (-XX:+UseNUMA) requires thread-local " | |
1467 "allocation\nbuffers (-XX:+UseTLAB).\n"); | |
1468 status = false; | |
1469 } | |
1470 | |
1471 // CMS space iteration, which FLSVerifyAllHeapreferences entails, | |
1472 // insists that we hold the requisite locks so that the iteration is | |
1473 // MT-safe. For the verification at start-up and shut-down, we don't | |
1474 // yet have a good way of acquiring and releasing these locks, | |
1475 // which are not visible at the CollectedHeap level. We want to | |
1476 // be able to acquire these locks and then do the iteration rather | |
1477 // than just disable the lock verification. This will be fixed under | |
1478 // bug 4788986. | |
1479 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) { | |
1480 if (VerifyGCStartAt == 0) { | |
1481 warning("Heap verification at start-up disabled " | |
1482 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); | |
1483 VerifyGCStartAt = 1; // Disable verification at start-up | |
1484 } | |
1485 if (VerifyBeforeExit) { | |
1486 warning("Heap verification at shutdown disabled " | |
1487 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); | |
1488 VerifyBeforeExit = false; // Disable verification at shutdown | |
1489 } | |
1490 } | |
1491 | |
1492 // Note: only executed in non-PRODUCT mode | |
1493 if (!UseAsyncConcMarkSweepGC && | |
1494 (ExplicitGCInvokesConcurrent || | |
1495 ExplicitGCInvokesConcurrentAndUnloadsClasses)) { | |
1496 jio_fprintf(defaultStream::error_stream(), | |
1497 "error: +ExplictGCInvokesConcurrent[AndUnloadsClasses] conflicts" | |
1498 " with -UseAsyncConcMarkSweepGC"); | |
1499 status = false; | |
1500 } | |
1501 | |
1502 return status; | |
1503 } | |
1504 | |
1505 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore, | |
1506 const char* option_type) { | |
1507 if (ignore) return false; | |
1508 | |
1509 const char* spacer = " "; | |
1510 if (option_type == NULL) { | |
1511 option_type = ++spacer; // Set both to the empty string. | |
1512 } | |
1513 | |
1514 if (os::obsolete_option(option)) { | |
1515 jio_fprintf(defaultStream::error_stream(), | |
1516 "Obsolete %s%soption: %s\n", option_type, spacer, | |
1517 option->optionString); | |
1518 return false; | |
1519 } else { | |
1520 jio_fprintf(defaultStream::error_stream(), | |
1521 "Unrecognized %s%soption: %s\n", option_type, spacer, | |
1522 option->optionString); | |
1523 return true; | |
1524 } | |
1525 } | |
1526 | |
1527 static const char* user_assertion_options[] = { | |
1528 "-da", "-ea", "-disableassertions", "-enableassertions", 0 | |
1529 }; | |
1530 | |
1531 static const char* system_assertion_options[] = { | |
1532 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0 | |
1533 }; | |
1534 | |
1535 // Return true if any of the strings in null-terminated array 'names' matches. | |
1536 // If tail_allowed is true, then the tail must begin with a colon; otherwise, | |
1537 // the option must match exactly. | |
1538 static bool match_option(const JavaVMOption* option, const char** names, const char** tail, | |
1539 bool tail_allowed) { | |
1540 for (/* empty */; *names != NULL; ++names) { | |
1541 if (match_option(option, *names, tail)) { | |
1542 if (**tail == '\0' || tail_allowed && **tail == ':') { | |
1543 return true; | |
1544 } | |
1545 } | |
1546 } | |
1547 return false; | |
1548 } | |
1549 | |
1550 Arguments::ArgsRange Arguments::parse_memory_size(const char* s, | |
1551 jlong* long_arg, | |
1552 jlong min_size) { | |
1553 if (!atomll(s, long_arg)) return arg_unreadable; | |
1554 return check_memory_size(*long_arg, min_size); | |
1555 } | |
1556 | |
1557 // Parse JavaVMInitArgs structure | |
1558 | |
1559 jint Arguments::parse_vm_init_args(const JavaVMInitArgs* args) { | |
1560 // For components of the system classpath. | |
1561 SysClassPath scp(Arguments::get_sysclasspath()); | |
1562 bool scp_assembly_required = false; | |
1563 | |
1564 // Save default settings for some mode flags | |
1565 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; | |
1566 Arguments::_UseOnStackReplacement = UseOnStackReplacement; | |
1567 Arguments::_ClipInlining = ClipInlining; | |
1568 Arguments::_BackgroundCompilation = BackgroundCompilation; | |
1569 Arguments::_Tier2CompileThreshold = Tier2CompileThreshold; | |
1570 | |
1571 // Parse JAVA_TOOL_OPTIONS environment variable (if present) | |
1572 jint result = parse_java_tool_options_environment_variable(&scp, &scp_assembly_required); | |
1573 if (result != JNI_OK) { | |
1574 return result; | |
1575 } | |
1576 | |
1577 // Parse JavaVMInitArgs structure passed in | |
1578 result = parse_each_vm_init_arg(args, &scp, &scp_assembly_required, COMMAND_LINE); | |
1579 if (result != JNI_OK) { | |
1580 return result; | |
1581 } | |
1582 | |
1583 // Parse _JAVA_OPTIONS environment variable (if present) (mimics classic VM) | |
1584 result = parse_java_options_environment_variable(&scp, &scp_assembly_required); | |
1585 if (result != JNI_OK) { | |
1586 return result; | |
1587 } | |
1588 | |
1589 // Do final processing now that all arguments have been parsed | |
1590 result = finalize_vm_init_args(&scp, scp_assembly_required); | |
1591 if (result != JNI_OK) { | |
1592 return result; | |
1593 } | |
1594 | |
1595 return JNI_OK; | |
1596 } | |
1597 | |
1598 | |
1599 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, | |
1600 SysClassPath* scp_p, | |
1601 bool* scp_assembly_required_p, | |
1602 FlagValueOrigin origin) { | |
1603 // Remaining part of option string | |
1604 const char* tail; | |
1605 | |
1606 // iterate over arguments | |
1607 for (int index = 0; index < args->nOptions; index++) { | |
1608 bool is_absolute_path = false; // for -agentpath vs -agentlib | |
1609 | |
1610 const JavaVMOption* option = args->options + index; | |
1611 | |
1612 if (!match_option(option, "-Djava.class.path", &tail) && | |
1613 !match_option(option, "-Dsun.java.command", &tail) && | |
1614 !match_option(option, "-Dsun.java.launcher", &tail)) { | |
1615 | |
1616 // add all jvm options to the jvm_args string. This string | |
1617 // is used later to set the java.vm.args PerfData string constant. | |
1618 // the -Djava.class.path and the -Dsun.java.command options are | |
1619 // omitted from jvm_args string as each have their own PerfData | |
1620 // string constant object. | |
1621 build_jvm_args(option->optionString); | |
1622 } | |
1623 | |
1624 // -verbose:[class/gc/jni] | |
1625 if (match_option(option, "-verbose", &tail)) { | |
1626 if (!strcmp(tail, ":class") || !strcmp(tail, "")) { | |
1627 FLAG_SET_CMDLINE(bool, TraceClassLoading, true); | |
1628 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); | |
1629 } else if (!strcmp(tail, ":gc")) { | |
1630 FLAG_SET_CMDLINE(bool, PrintGC, true); | |
1631 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); | |
1632 } else if (!strcmp(tail, ":jni")) { | |
1633 FLAG_SET_CMDLINE(bool, PrintJNIResolving, true); | |
1634 } | |
1635 // -da / -ea / -disableassertions / -enableassertions | |
1636 // These accept an optional class/package name separated by a colon, e.g., | |
1637 // -da:java.lang.Thread. | |
1638 } else if (match_option(option, user_assertion_options, &tail, true)) { | |
1639 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' | |
1640 if (*tail == '\0') { | |
1641 JavaAssertions::setUserClassDefault(enable); | |
1642 } else { | |
1643 assert(*tail == ':', "bogus match by match_option()"); | |
1644 JavaAssertions::addOption(tail + 1, enable); | |
1645 } | |
1646 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions | |
1647 } else if (match_option(option, system_assertion_options, &tail, false)) { | |
1648 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' | |
1649 JavaAssertions::setSystemClassDefault(enable); | |
1650 // -bootclasspath: | |
1651 } else if (match_option(option, "-Xbootclasspath:", &tail)) { | |
1652 scp_p->reset_path(tail); | |
1653 *scp_assembly_required_p = true; | |
1654 // -bootclasspath/a: | |
1655 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) { | |
1656 scp_p->add_suffix(tail); | |
1657 *scp_assembly_required_p = true; | |
1658 // -bootclasspath/p: | |
1659 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) { | |
1660 scp_p->add_prefix(tail); | |
1661 *scp_assembly_required_p = true; | |
1662 // -Xrun | |
1663 } else if (match_option(option, "-Xrun", &tail)) { | |
1664 if(tail != NULL) { | |
1665 const char* pos = strchr(tail, ':'); | |
1666 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; | |
1667 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); | |
1668 name[len] = '\0'; | |
1669 | |
1670 char *options = NULL; | |
1671 if(pos != NULL) { | |
1672 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied. | |
1673 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2), pos+1, len2); | |
1674 } | |
1675 #ifdef JVMTI_KERNEL | |
1676 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { | |
1677 warning("profiling and debugging agents are not supported with Kernel VM"); | |
1678 } else | |
1679 #endif // JVMTI_KERNEL | |
1680 add_init_library(name, options); | |
1681 } | |
1682 // -agentlib and -agentpath | |
1683 } else if (match_option(option, "-agentlib:", &tail) || | |
1684 (is_absolute_path = match_option(option, "-agentpath:", &tail))) { | |
1685 if(tail != NULL) { | |
1686 const char* pos = strchr(tail, '='); | |
1687 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; | |
1688 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); | |
1689 name[len] = '\0'; | |
1690 | |
1691 char *options = NULL; | |
1692 if(pos != NULL) { | |
1693 options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(pos + 1) + 1), pos + 1); | |
1694 } | |
1695 #ifdef JVMTI_KERNEL | |
1696 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { | |
1697 warning("profiling and debugging agents are not supported with Kernel VM"); | |
1698 } else | |
1699 #endif // JVMTI_KERNEL | |
1700 add_init_agent(name, options, is_absolute_path); | |
1701 | |
1702 } | |
1703 // -javaagent | |
1704 } else if (match_option(option, "-javaagent:", &tail)) { | |
1705 if(tail != NULL) { | |
1706 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1), tail); | |
1707 add_init_agent("instrument", options, false); | |
1708 } | |
1709 // -Xnoclassgc | |
1710 } else if (match_option(option, "-Xnoclassgc", &tail)) { | |
1711 FLAG_SET_CMDLINE(bool, ClassUnloading, false); | |
1712 // -Xincgc: i-CMS | |
1713 } else if (match_option(option, "-Xincgc", &tail)) { | |
1714 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); | |
1715 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, true); | |
1716 // -Xnoincgc: no i-CMS | |
1717 } else if (match_option(option, "-Xnoincgc", &tail)) { | |
1718 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); | |
1719 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, false); | |
1720 // -Xconcgc | |
1721 } else if (match_option(option, "-Xconcgc", &tail)) { | |
1722 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); | |
1723 // -Xnoconcgc | |
1724 } else if (match_option(option, "-Xnoconcgc", &tail)) { | |
1725 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); | |
1726 // -Xbatch | |
1727 } else if (match_option(option, "-Xbatch", &tail)) { | |
1728 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); | |
1729 // -Xmn for compatibility with other JVM vendors | |
1730 } else if (match_option(option, "-Xmn", &tail)) { | |
1731 jlong long_initial_eden_size = 0; | |
1732 ArgsRange errcode = parse_memory_size(tail, &long_initial_eden_size, 1); | |
1733 if (errcode != arg_in_range) { | |
1734 jio_fprintf(defaultStream::error_stream(), | |
1735 "Invalid initial eden size: %s\n", option->optionString); | |
1736 describe_range_error(errcode); | |
1737 return JNI_EINVAL; | |
1738 } | |
1739 FLAG_SET_CMDLINE(uintx, MaxNewSize, (size_t) long_initial_eden_size); | |
1740 FLAG_SET_CMDLINE(uintx, NewSize, (size_t) long_initial_eden_size); | |
1741 // -Xms | |
1742 } else if (match_option(option, "-Xms", &tail)) { | |
1743 jlong long_initial_heap_size = 0; | |
1744 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 1); | |
1745 if (errcode != arg_in_range) { | |
1746 jio_fprintf(defaultStream::error_stream(), | |
1747 "Invalid initial heap size: %s\n", option->optionString); | |
1748 describe_range_error(errcode); | |
1749 return JNI_EINVAL; | |
1750 } | |
1751 set_initial_heap_size((size_t) long_initial_heap_size); | |
1752 // Currently the minimum size and the initial heap sizes are the same. | |
1753 set_min_heap_size(initial_heap_size()); | |
1754 // -Xmx | |
1755 } else if (match_option(option, "-Xmx", &tail)) { | |
1756 jlong long_max_heap_size = 0; | |
1757 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1); | |
1758 if (errcode != arg_in_range) { | |
1759 jio_fprintf(defaultStream::error_stream(), | |
1760 "Invalid maximum heap size: %s\n", option->optionString); | |
1761 describe_range_error(errcode); | |
1762 return JNI_EINVAL; | |
1763 } | |
1764 FLAG_SET_CMDLINE(uintx, MaxHeapSize, (size_t) long_max_heap_size); | |
1765 // Xmaxf | |
1766 } else if (match_option(option, "-Xmaxf", &tail)) { | |
1767 int maxf = (int)(atof(tail) * 100); | |
1768 if (maxf < 0 || maxf > 100) { | |
1769 jio_fprintf(defaultStream::error_stream(), | |
1770 "Bad max heap free percentage size: %s\n", | |
1771 option->optionString); | |
1772 return JNI_EINVAL; | |
1773 } else { | |
1774 FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf); | |
1775 } | |
1776 // Xminf | |
1777 } else if (match_option(option, "-Xminf", &tail)) { | |
1778 int minf = (int)(atof(tail) * 100); | |
1779 if (minf < 0 || minf > 100) { | |
1780 jio_fprintf(defaultStream::error_stream(), | |
1781 "Bad min heap free percentage size: %s\n", | |
1782 option->optionString); | |
1783 return JNI_EINVAL; | |
1784 } else { | |
1785 FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf); | |
1786 } | |
1787 // -Xss | |
1788 } else if (match_option(option, "-Xss", &tail)) { | |
1789 jlong long_ThreadStackSize = 0; | |
1790 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000); | |
1791 if (errcode != arg_in_range) { | |
1792 jio_fprintf(defaultStream::error_stream(), | |
1793 "Invalid thread stack size: %s\n", option->optionString); | |
1794 describe_range_error(errcode); | |
1795 return JNI_EINVAL; | |
1796 } | |
1797 // Internally track ThreadStackSize in units of 1024 bytes. | |
1798 FLAG_SET_CMDLINE(intx, ThreadStackSize, | |
1799 round_to((int)long_ThreadStackSize, K) / K); | |
1800 // -Xoss | |
1801 } else if (match_option(option, "-Xoss", &tail)) { | |
1802 // HotSpot does not have separate native and Java stacks, ignore silently for compatibility | |
1803 // -Xmaxjitcodesize | |
1804 } else if (match_option(option, "-Xmaxjitcodesize", &tail)) { | |
1805 jlong long_ReservedCodeCacheSize = 0; | |
1806 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, | |
1807 InitialCodeCacheSize); | |
1808 if (errcode != arg_in_range) { | |
1809 jio_fprintf(defaultStream::error_stream(), | |
1810 "Invalid maximum code cache size: %s\n", | |
1811 option->optionString); | |
1812 describe_range_error(errcode); | |
1813 return JNI_EINVAL; | |
1814 } | |
1815 FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize); | |
1816 // -green | |
1817 } else if (match_option(option, "-green", &tail)) { | |
1818 jio_fprintf(defaultStream::error_stream(), | |
1819 "Green threads support not available\n"); | |
1820 return JNI_EINVAL; | |
1821 // -native | |
1822 } else if (match_option(option, "-native", &tail)) { | |
1823 // HotSpot always uses native threads, ignore silently for compatibility | |
1824 // -Xsqnopause | |
1825 } else if (match_option(option, "-Xsqnopause", &tail)) { | |
1826 // EVM option, ignore silently for compatibility | |
1827 // -Xrs | |
1828 } else if (match_option(option, "-Xrs", &tail)) { | |
1829 // Classic/EVM option, new functionality | |
1830 FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true); | |
1831 } else if (match_option(option, "-Xusealtsigs", &tail)) { | |
1832 // change default internal VM signals used - lower case for back compat | |
1833 FLAG_SET_CMDLINE(bool, UseAltSigs, true); | |
1834 // -Xoptimize | |
1835 } else if (match_option(option, "-Xoptimize", &tail)) { | |
1836 // EVM option, ignore silently for compatibility | |
1837 // -Xprof | |
1838 } else if (match_option(option, "-Xprof", &tail)) { | |
1839 #ifndef FPROF_KERNEL | |
1840 _has_profile = true; | |
1841 #else // FPROF_KERNEL | |
1842 // do we have to exit? | |
1843 warning("Kernel VM does not support flat profiling."); | |
1844 #endif // FPROF_KERNEL | |
1845 // -Xaprof | |
1846 } else if (match_option(option, "-Xaprof", &tail)) { | |
1847 _has_alloc_profile = true; | |
1848 // -Xconcurrentio | |
1849 } else if (match_option(option, "-Xconcurrentio", &tail)) { | |
1850 FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true); | |
1851 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); | |
1852 FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1); | |
1853 FLAG_SET_CMDLINE(bool, UseTLAB, false); | |
1854 FLAG_SET_CMDLINE(uintx, NewSizeThreadIncrease, 16 * K); // 20Kb per thread added to new generation | |
1855 | |
1856 // -Xinternalversion | |
1857 } else if (match_option(option, "-Xinternalversion", &tail)) { | |
1858 jio_fprintf(defaultStream::output_stream(), "%s\n", | |
1859 VM_Version::internal_vm_info_string()); | |
1860 vm_exit(0); | |
1861 #ifndef PRODUCT | |
1862 // -Xprintflags | |
1863 } else if (match_option(option, "-Xprintflags", &tail)) { | |
1864 CommandLineFlags::printFlags(); | |
1865 vm_exit(0); | |
1866 #endif | |
1867 // -D | |
1868 } else if (match_option(option, "-D", &tail)) { | |
1869 if (!add_property(tail)) { | |
1870 return JNI_ENOMEM; | |
1871 } | |
1872 // Out of the box management support | |
1873 if (match_option(option, "-Dcom.sun.management", &tail)) { | |
1874 FLAG_SET_CMDLINE(bool, ManagementServer, true); | |
1875 } | |
1876 // -Xint | |
1877 } else if (match_option(option, "-Xint", &tail)) { | |
1878 set_mode_flags(_int); | |
1879 // -Xmixed | |
1880 } else if (match_option(option, "-Xmixed", &tail)) { | |
1881 set_mode_flags(_mixed); | |
1882 // -Xcomp | |
1883 } else if (match_option(option, "-Xcomp", &tail)) { | |
1884 // for testing the compiler; turn off all flags that inhibit compilation | |
1885 set_mode_flags(_comp); | |
1886 | |
1887 // -Xshare:dump | |
1888 } else if (match_option(option, "-Xshare:dump", &tail)) { | |
1889 #ifdef TIERED | |
1890 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); | |
1891 set_mode_flags(_int); // Prevent compilation, which creates objects | |
1892 #elif defined(COMPILER2) | |
1893 vm_exit_during_initialization( | |
1894 "Dumping a shared archive is not supported on the Server JVM.", NULL); | |
1895 #elif defined(KERNEL) | |
1896 vm_exit_during_initialization( | |
1897 "Dumping a shared archive is not supported on the Kernel JVM.", NULL); | |
1898 #else | |
1899 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); | |
1900 set_mode_flags(_int); // Prevent compilation, which creates objects | |
1901 #endif | |
1902 // -Xshare:on | |
1903 } else if (match_option(option, "-Xshare:on", &tail)) { | |
1904 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); | |
1905 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true); | |
1906 #ifdef TIERED | |
1907 FLAG_SET_CMDLINE(bool, ForceSharedSpaces, true); | |
1908 #endif // TIERED | |
1909 // -Xshare:auto | |
1910 } else if (match_option(option, "-Xshare:auto", &tail)) { | |
1911 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); | |
1912 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); | |
1913 // -Xshare:off | |
1914 } else if (match_option(option, "-Xshare:off", &tail)) { | |
1915 FLAG_SET_CMDLINE(bool, UseSharedSpaces, false); | |
1916 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); | |
1917 | |
1918 // -Xverify | |
1919 } else if (match_option(option, "-Xverify", &tail)) { | |
1920 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) { | |
1921 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true); | |
1922 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); | |
1923 } else if (strcmp(tail, ":remote") == 0) { | |
1924 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); | |
1925 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); | |
1926 } else if (strcmp(tail, ":none") == 0) { | |
1927 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); | |
1928 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false); | |
1929 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) { | |
1930 return JNI_EINVAL; | |
1931 } | |
1932 // -Xdebug | |
1933 } else if (match_option(option, "-Xdebug", &tail)) { | |
1934 // note this flag has been used, then ignore | |
1935 set_xdebug_mode(true); | |
1936 // -Xnoagent | |
1937 } else if (match_option(option, "-Xnoagent", &tail)) { | |
1938 // For compatibility with classic. HotSpot refuses to load the old style agent.dll. | |
1939 } else if (match_option(option, "-Xboundthreads", &tail)) { | |
1940 // Bind user level threads to kernel threads (Solaris only) | |
1941 FLAG_SET_CMDLINE(bool, UseBoundThreads, true); | |
1942 } else if (match_option(option, "-Xloggc:", &tail)) { | |
1943 // Redirect GC output to the file. -Xloggc:<filename> | |
1944 // ostream_init_log(), when called will use this filename | |
1945 // to initialize a fileStream. | |
1946 _gc_log_filename = strdup(tail); | |
1947 FLAG_SET_CMDLINE(bool, PrintGC, true); | |
1948 FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true); | |
1949 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); | |
1950 | |
1951 // JNI hooks | |
1952 } else if (match_option(option, "-Xcheck", &tail)) { | |
1953 if (!strcmp(tail, ":jni")) { | |
1954 CheckJNICalls = true; | |
1955 } else if (is_bad_option(option, args->ignoreUnrecognized, | |
1956 "check")) { | |
1957 return JNI_EINVAL; | |
1958 } | |
1959 } else if (match_option(option, "vfprintf", &tail)) { | |
1960 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo); | |
1961 } else if (match_option(option, "exit", &tail)) { | |
1962 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo); | |
1963 } else if (match_option(option, "abort", &tail)) { | |
1964 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo); | |
1965 // -XX:+AggressiveHeap | |
1966 } else if (match_option(option, "-XX:+AggressiveHeap", &tail)) { | |
1967 | |
1968 // This option inspects the machine and attempts to set various | |
1969 // parameters to be optimal for long-running, memory allocation | |
1970 // intensive jobs. It is intended for machines with large | |
1971 // amounts of cpu and memory. | |
1972 | |
1973 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit | |
1974 // VM, but we may not be able to represent the total physical memory | |
1975 // available (like having 8gb of memory on a box but using a 32bit VM). | |
1976 // Thus, we need to make sure we're using a julong for intermediate | |
1977 // calculations. | |
1978 julong initHeapSize; | |
1979 julong total_memory = os::physical_memory(); | |
1980 | |
1981 if (total_memory < (julong)256*M) { | |
1982 jio_fprintf(defaultStream::error_stream(), | |
1983 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n"); | |
1984 vm_exit(1); | |
1985 } | |
1986 | |
1987 // The heap size is half of available memory, or (at most) | |
1988 // all of possible memory less 160mb (leaving room for the OS | |
1989 // when using ISM). This is the maximum; because adaptive sizing | |
1990 // is turned on below, the actual space used may be smaller. | |
1991 | |
1992 initHeapSize = MIN2(total_memory / (julong)2, | |
1993 total_memory - (julong)160*M); | |
1994 | |
1995 // Make sure that if we have a lot of memory we cap the 32 bit | |
1996 // process space. The 64bit VM version of this function is a nop. | |
1997 initHeapSize = os::allocatable_physical_memory(initHeapSize); | |
1998 | |
1999 // The perm gen is separate but contiguous with the | |
2000 // object heap (and is reserved with it) so subtract it | |
2001 // from the heap size. | |
2002 if (initHeapSize > MaxPermSize) { | |
2003 initHeapSize = initHeapSize - MaxPermSize; | |
2004 } else { | |
2005 warning("AggressiveHeap and MaxPermSize values may conflict"); | |
2006 } | |
2007 | |
2008 if (FLAG_IS_DEFAULT(MaxHeapSize)) { | |
2009 FLAG_SET_CMDLINE(uintx, MaxHeapSize, initHeapSize); | |
2010 set_initial_heap_size(MaxHeapSize); | |
2011 // Currently the minimum size and the initial heap sizes are the same. | |
2012 set_min_heap_size(initial_heap_size()); | |
2013 } | |
2014 if (FLAG_IS_DEFAULT(NewSize)) { | |
2015 // Make the young generation 3/8ths of the total heap. | |
2016 FLAG_SET_CMDLINE(uintx, NewSize, | |
2017 ((julong)MaxHeapSize / (julong)8) * (julong)3); | |
2018 FLAG_SET_CMDLINE(uintx, MaxNewSize, NewSize); | |
2019 } | |
2020 | |
2021 FLAG_SET_DEFAULT(UseLargePages, true); | |
2022 | |
2023 // Increase some data structure sizes for efficiency | |
2024 FLAG_SET_CMDLINE(uintx, BaseFootPrintEstimate, MaxHeapSize); | |
2025 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); | |
2026 FLAG_SET_CMDLINE(uintx, TLABSize, 256*K); | |
2027 | |
2028 // See the OldPLABSize comment below, but replace 'after promotion' | |
2029 // with 'after copying'. YoungPLABSize is the size of the survivor | |
2030 // space per-gc-thread buffers. The default is 4kw. | |
2031 FLAG_SET_CMDLINE(uintx, YoungPLABSize, 256*K); // Note: this is in words | |
2032 | |
2033 // OldPLABSize is the size of the buffers in the old gen that | |
2034 // UseParallelGC uses to promote live data that doesn't fit in the | |
2035 // survivor spaces. At any given time, there's one for each gc thread. | |
2036 // The default size is 1kw. These buffers are rarely used, since the | |
2037 // survivor spaces are usually big enough. For specjbb, however, there | |
2038 // are occasions when there's lots of live data in the young gen | |
2039 // and we end up promoting some of it. We don't have a definite | |
2040 // explanation for why bumping OldPLABSize helps, but the theory | |
2041 // is that a bigger PLAB results in retaining something like the | |
2042 // original allocation order after promotion, which improves mutator | |
2043 // locality. A minor effect may be that larger PLABs reduce the | |
2044 // number of PLAB allocation events during gc. The value of 8kw | |
2045 // was arrived at by experimenting with specjbb. | |
2046 FLAG_SET_CMDLINE(uintx, OldPLABSize, 8*K); // Note: this is in words | |
2047 | |
2048 // CompilationPolicyChoice=0 causes the server compiler to adopt | |
2049 // a more conservative which-method-do-I-compile policy when one | |
2050 // of the counters maintained by the interpreter trips. The | |
2051 // result is reduced startup time and improved specjbb and | |
2052 // alacrity performance. Zero is the default, but we set it | |
2053 // explicitly here in case the default changes. | |
2054 // See runtime/compilationPolicy.*. | |
2055 FLAG_SET_CMDLINE(intx, CompilationPolicyChoice, 0); | |
2056 | |
2057 // Enable parallel GC and adaptive generation sizing | |
2058 FLAG_SET_CMDLINE(bool, UseParallelGC, true); | |
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2059 FLAG_SET_DEFAULT(ParallelGCThreads, |
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2060 Abstract_VM_Version::parallel_worker_threads()); |
0 | 2061 |
2062 // Encourage steady state memory management | |
2063 FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100); | |
2064 | |
2065 // This appears to improve mutator locality | |
2066 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); | |
2067 | |
2068 // Get around early Solaris scheduling bug | |
2069 // (affinity vs other jobs on system) | |
2070 // but disallow DR and offlining (5008695). | |
2071 FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true); | |
2072 | |
2073 } else if (match_option(option, "-XX:+NeverTenure", &tail)) { | |
2074 // The last option must always win. | |
2075 FLAG_SET_CMDLINE(bool, AlwaysTenure, false); | |
2076 FLAG_SET_CMDLINE(bool, NeverTenure, true); | |
2077 } else if (match_option(option, "-XX:+AlwaysTenure", &tail)) { | |
2078 // The last option must always win. | |
2079 FLAG_SET_CMDLINE(bool, NeverTenure, false); | |
2080 FLAG_SET_CMDLINE(bool, AlwaysTenure, true); | |
2081 } else if (match_option(option, "-XX:+CMSPermGenSweepingEnabled", &tail) || | |
2082 match_option(option, "-XX:-CMSPermGenSweepingEnabled", &tail)) { | |
2083 jio_fprintf(defaultStream::error_stream(), | |
2084 "Please use CMSClassUnloadingEnabled in place of " | |
2085 "CMSPermGenSweepingEnabled in the future\n"); | |
2086 } else if (match_option(option, "-XX:+UseGCTimeLimit", &tail)) { | |
2087 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, true); | |
2088 jio_fprintf(defaultStream::error_stream(), | |
2089 "Please use -XX:+UseGCOverheadLimit in place of " | |
2090 "-XX:+UseGCTimeLimit in the future\n"); | |
2091 } else if (match_option(option, "-XX:-UseGCTimeLimit", &tail)) { | |
2092 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, false); | |
2093 jio_fprintf(defaultStream::error_stream(), | |
2094 "Please use -XX:-UseGCOverheadLimit in place of " | |
2095 "-XX:-UseGCTimeLimit in the future\n"); | |
2096 // The TLE options are for compatibility with 1.3 and will be | |
2097 // removed without notice in a future release. These options | |
2098 // are not to be documented. | |
2099 } else if (match_option(option, "-XX:MaxTLERatio=", &tail)) { | |
2100 // No longer used. | |
2101 } else if (match_option(option, "-XX:+ResizeTLE", &tail)) { | |
2102 FLAG_SET_CMDLINE(bool, ResizeTLAB, true); | |
2103 } else if (match_option(option, "-XX:-ResizeTLE", &tail)) { | |
2104 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); | |
2105 } else if (match_option(option, "-XX:+PrintTLE", &tail)) { | |
2106 FLAG_SET_CMDLINE(bool, PrintTLAB, true); | |
2107 } else if (match_option(option, "-XX:-PrintTLE", &tail)) { | |
2108 FLAG_SET_CMDLINE(bool, PrintTLAB, false); | |
2109 } else if (match_option(option, "-XX:TLEFragmentationRatio=", &tail)) { | |
2110 // No longer used. | |
2111 } else if (match_option(option, "-XX:TLESize=", &tail)) { | |
2112 jlong long_tlab_size = 0; | |
2113 ArgsRange errcode = parse_memory_size(tail, &long_tlab_size, 1); | |
2114 if (errcode != arg_in_range) { | |
2115 jio_fprintf(defaultStream::error_stream(), | |
2116 "Invalid TLAB size: %s\n", option->optionString); | |
2117 describe_range_error(errcode); | |
2118 return JNI_EINVAL; | |
2119 } | |
2120 FLAG_SET_CMDLINE(uintx, TLABSize, long_tlab_size); | |
2121 } else if (match_option(option, "-XX:TLEThreadRatio=", &tail)) { | |
2122 // No longer used. | |
2123 } else if (match_option(option, "-XX:+UseTLE", &tail)) { | |
2124 FLAG_SET_CMDLINE(bool, UseTLAB, true); | |
2125 } else if (match_option(option, "-XX:-UseTLE", &tail)) { | |
2126 FLAG_SET_CMDLINE(bool, UseTLAB, false); | |
2127 SOLARIS_ONLY( | |
2128 } else if (match_option(option, "-XX:+UsePermISM", &tail)) { | |
2129 warning("-XX:+UsePermISM is obsolete."); | |
2130 FLAG_SET_CMDLINE(bool, UseISM, true); | |
2131 } else if (match_option(option, "-XX:-UsePermISM", &tail)) { | |
2132 FLAG_SET_CMDLINE(bool, UseISM, false); | |
2133 ) | |
2134 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr", &tail)) { | |
2135 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false); | |
2136 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true); | |
2137 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout", &tail)) { | |
2138 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false); | |
2139 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true); | |
2140 } else if (match_option(option, "-XX:+ExtendedDTraceProbes", &tail)) { | |
2141 #ifdef SOLARIS | |
2142 FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true); | |
2143 FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true); | |
2144 FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true); | |
2145 FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true); | |
2146 #else // ndef SOLARIS | |
2147 jio_fprintf(defaultStream::error_stream(), | |
2148 "ExtendedDTraceProbes flag is only applicable on Solaris\n"); | |
2149 return JNI_EINVAL; | |
2150 #endif // ndef SOLARIS | |
2151 } else | |
2152 #ifdef ASSERT | |
2153 if (match_option(option, "-XX:+FullGCALot", &tail)) { | |
2154 FLAG_SET_CMDLINE(bool, FullGCALot, true); | |
2155 // disable scavenge before parallel mark-compact | |
2156 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); | |
2157 } else | |
2158 #endif | |
2159 if (match_option(option, "-XX:ParCMSPromoteBlocksToClaim=", &tail)) { | |
2160 julong cms_blocks_to_claim = (julong)atol(tail); | |
2161 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); | |
2162 jio_fprintf(defaultStream::error_stream(), | |
2163 "Please use -XX:CMSParPromoteBlocksToClaim in place of " | |
2164 "-XX:ParCMSPromoteBlocksToClaim in the future\n"); | |
2165 } else | |
2166 if (match_option(option, "-XX:ParallelGCOldGenAllocBufferSize=", &tail)) { | |
2167 jlong old_plab_size = 0; | |
2168 ArgsRange errcode = parse_memory_size(tail, &old_plab_size, 1); | |
2169 if (errcode != arg_in_range) { | |
2170 jio_fprintf(defaultStream::error_stream(), | |
2171 "Invalid old PLAB size: %s\n", option->optionString); | |
2172 describe_range_error(errcode); | |
2173 return JNI_EINVAL; | |
2174 } | |
2175 FLAG_SET_CMDLINE(uintx, OldPLABSize, (julong)old_plab_size); | |
2176 jio_fprintf(defaultStream::error_stream(), | |
2177 "Please use -XX:OldPLABSize in place of " | |
2178 "-XX:ParallelGCOldGenAllocBufferSize in the future\n"); | |
2179 } else | |
2180 if (match_option(option, "-XX:ParallelGCToSpaceAllocBufferSize=", &tail)) { | |
2181 jlong young_plab_size = 0; | |
2182 ArgsRange errcode = parse_memory_size(tail, &young_plab_size, 1); | |
2183 if (errcode != arg_in_range) { | |
2184 jio_fprintf(defaultStream::error_stream(), | |
2185 "Invalid young PLAB size: %s\n", option->optionString); | |
2186 describe_range_error(errcode); | |
2187 return JNI_EINVAL; | |
2188 } | |
2189 FLAG_SET_CMDLINE(uintx, YoungPLABSize, (julong)young_plab_size); | |
2190 jio_fprintf(defaultStream::error_stream(), | |
2191 "Please use -XX:YoungPLABSize in place of " | |
2192 "-XX:ParallelGCToSpaceAllocBufferSize in the future\n"); | |
2193 } else | |
2194 if (match_option(option, "-XX:", &tail)) { // -XX:xxxx | |
2195 // Skip -XX:Flags= since that case has already been handled | |
2196 if (strncmp(tail, "Flags=", strlen("Flags=")) != 0) { | |
2197 if (!process_argument(tail, args->ignoreUnrecognized, origin)) { | |
2198 return JNI_EINVAL; | |
2199 } | |
2200 } | |
2201 // Unknown option | |
2202 } else if (is_bad_option(option, args->ignoreUnrecognized)) { | |
2203 return JNI_ERR; | |
2204 } | |
2205 } | |
2206 | |
2207 return JNI_OK; | |
2208 } | |
2209 | |
2210 jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) { | |
2211 // This must be done after all -D arguments have been processed. | |
2212 scp_p->expand_endorsed(); | |
2213 | |
2214 if (scp_assembly_required || scp_p->get_endorsed() != NULL) { | |
2215 // Assemble the bootclasspath elements into the final path. | |
2216 Arguments::set_sysclasspath(scp_p->combined_path()); | |
2217 } | |
2218 | |
2219 // This must be done after all arguments have been processed. | |
2220 // java_compiler() true means set to "NONE" or empty. | |
2221 if (java_compiler() && !xdebug_mode()) { | |
2222 // For backwards compatibility, we switch to interpreted mode if | |
2223 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was | |
2224 // not specified. | |
2225 set_mode_flags(_int); | |
2226 } | |
2227 if (CompileThreshold == 0) { | |
2228 set_mode_flags(_int); | |
2229 } | |
2230 | |
2231 #ifdef TIERED | |
2232 // If we are using tiered compilation in the tiered vm then c1 will | |
2233 // do the profiling and we don't want to waste that time in the | |
2234 // interpreter. | |
2235 if (TieredCompilation) { | |
2236 ProfileInterpreter = false; | |
2237 } else { | |
2238 // Since we are running vanilla server we must adjust the compile threshold | |
2239 // unless the user has already adjusted it because the default threshold assumes | |
2240 // we will run tiered. | |
2241 | |
2242 if (FLAG_IS_DEFAULT(CompileThreshold)) { | |
2243 CompileThreshold = Tier2CompileThreshold; | |
2244 } | |
2245 } | |
2246 #endif // TIERED | |
2247 | |
2248 #ifndef COMPILER2 | |
2249 // Don't degrade server performance for footprint | |
2250 if (FLAG_IS_DEFAULT(UseLargePages) && | |
2251 MaxHeapSize < LargePageHeapSizeThreshold) { | |
2252 // No need for large granularity pages w/small heaps. | |
2253 // Note that large pages are enabled/disabled for both the | |
2254 // Java heap and the code cache. | |
2255 FLAG_SET_DEFAULT(UseLargePages, false); | |
2256 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseMPSS, false)); | |
2257 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseISM, false)); | |
2258 } | |
2259 #else | |
2260 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) { | |
2261 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1); | |
2262 } | |
2263 #endif | |
2264 | |
2265 if (!check_vm_args_consistency()) { | |
2266 return JNI_ERR; | |
2267 } | |
2268 | |
2269 return JNI_OK; | |
2270 } | |
2271 | |
2272 jint Arguments::parse_java_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { | |
2273 return parse_options_environment_variable("_JAVA_OPTIONS", scp_p, | |
2274 scp_assembly_required_p); | |
2275 } | |
2276 | |
2277 jint Arguments::parse_java_tool_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { | |
2278 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", scp_p, | |
2279 scp_assembly_required_p); | |
2280 } | |
2281 | |
2282 jint Arguments::parse_options_environment_variable(const char* name, SysClassPath* scp_p, bool* scp_assembly_required_p) { | |
2283 const int N_MAX_OPTIONS = 64; | |
2284 const int OPTION_BUFFER_SIZE = 1024; | |
2285 char buffer[OPTION_BUFFER_SIZE]; | |
2286 | |
2287 // The variable will be ignored if it exceeds the length of the buffer. | |
2288 // Don't check this variable if user has special privileges | |
2289 // (e.g. unix su command). | |
2290 if (os::getenv(name, buffer, sizeof(buffer)) && | |
2291 !os::have_special_privileges()) { | |
2292 JavaVMOption options[N_MAX_OPTIONS]; // Construct option array | |
2293 jio_fprintf(defaultStream::error_stream(), | |
2294 "Picked up %s: %s\n", name, buffer); | |
2295 char* rd = buffer; // pointer to the input string (rd) | |
2296 int i; | |
2297 for (i = 0; i < N_MAX_OPTIONS;) { // repeat for all options in the input string | |
2298 while (isspace(*rd)) rd++; // skip whitespace | |
2299 if (*rd == 0) break; // we re done when the input string is read completely | |
2300 | |
2301 // The output, option string, overwrites the input string. | |
2302 // Because of quoting, the pointer to the option string (wrt) may lag the pointer to | |
2303 // input string (rd). | |
2304 char* wrt = rd; | |
2305 | |
2306 options[i++].optionString = wrt; // Fill in option | |
2307 while (*rd != 0 && !isspace(*rd)) { // unquoted strings terminate with a space or NULL | |
2308 if (*rd == '\'' || *rd == '"') { // handle a quoted string | |
2309 int quote = *rd; // matching quote to look for | |
2310 rd++; // don't copy open quote | |
2311 while (*rd != quote) { // include everything (even spaces) up until quote | |
2312 if (*rd == 0) { // string termination means unmatched string | |
2313 jio_fprintf(defaultStream::error_stream(), | |
2314 "Unmatched quote in %s\n", name); | |
2315 return JNI_ERR; | |
2316 } | |
2317 *wrt++ = *rd++; // copy to option string | |
2318 } | |
2319 rd++; // don't copy close quote | |
2320 } else { | |
2321 *wrt++ = *rd++; // copy to option string | |
2322 } | |
2323 } | |
2324 // Need to check if we're done before writing a NULL, | |
2325 // because the write could be to the byte that rd is pointing to. | |
2326 if (*rd++ == 0) { | |
2327 *wrt = 0; | |
2328 break; | |
2329 } | |
2330 *wrt = 0; // Zero terminate option | |
2331 } | |
2332 // Construct JavaVMInitArgs structure and parse as if it was part of the command line | |
2333 JavaVMInitArgs vm_args; | |
2334 vm_args.version = JNI_VERSION_1_2; | |
2335 vm_args.options = options; | |
2336 vm_args.nOptions = i; | |
2337 vm_args.ignoreUnrecognized = false; | |
2338 | |
2339 if (PrintVMOptions) { | |
2340 const char* tail; | |
2341 for (int i = 0; i < vm_args.nOptions; i++) { | |
2342 const JavaVMOption *option = vm_args.options + i; | |
2343 if (match_option(option, "-XX:", &tail)) { | |
2344 logOption(tail); | |
2345 } | |
2346 } | |
2347 } | |
2348 | |
2349 return(parse_each_vm_init_arg(&vm_args, scp_p, scp_assembly_required_p, ENVIRON_VAR)); | |
2350 } | |
2351 return JNI_OK; | |
2352 } | |
2353 | |
2354 // Parse entry point called from JNI_CreateJavaVM | |
2355 | |
2356 jint Arguments::parse(const JavaVMInitArgs* args) { | |
2357 | |
2358 // Sharing support | |
2359 // Construct the path to the archive | |
2360 char jvm_path[JVM_MAXPATHLEN]; | |
2361 os::jvm_path(jvm_path, sizeof(jvm_path)); | |
2362 #ifdef TIERED | |
2363 if (strstr(jvm_path, "client") != NULL) { | |
2364 force_client_mode = true; | |
2365 } | |
2366 #endif // TIERED | |
2367 char *end = strrchr(jvm_path, *os::file_separator()); | |
2368 if (end != NULL) *end = '\0'; | |
2369 char *shared_archive_path = NEW_C_HEAP_ARRAY(char, strlen(jvm_path) + | |
2370 strlen(os::file_separator()) + 20); | |
2371 if (shared_archive_path == NULL) return JNI_ENOMEM; | |
2372 strcpy(shared_archive_path, jvm_path); | |
2373 strcat(shared_archive_path, os::file_separator()); | |
2374 strcat(shared_archive_path, "classes"); | |
2375 DEBUG_ONLY(strcat(shared_archive_path, "_g");) | |
2376 strcat(shared_archive_path, ".jsa"); | |
2377 SharedArchivePath = shared_archive_path; | |
2378 | |
2379 // Remaining part of option string | |
2380 const char* tail; | |
2381 | |
2382 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed. | |
2383 bool settings_file_specified = false; | |
2384 int index; | |
2385 for (index = 0; index < args->nOptions; index++) { | |
2386 const JavaVMOption *option = args->options + index; | |
2387 if (match_option(option, "-XX:Flags=", &tail)) { | |
2388 if (!process_settings_file(tail, true, args->ignoreUnrecognized)) { | |
2389 return JNI_EINVAL; | |
2390 } | |
2391 settings_file_specified = true; | |
2392 } | |
2393 if (match_option(option, "-XX:+PrintVMOptions", &tail)) { | |
2394 PrintVMOptions = true; | |
2395 } | |
2396 } | |
2397 | |
2398 // Parse default .hotspotrc settings file | |
2399 if (!settings_file_specified) { | |
2400 if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) { | |
2401 return JNI_EINVAL; | |
2402 } | |
2403 } | |
2404 | |
2405 if (PrintVMOptions) { | |
2406 for (index = 0; index < args->nOptions; index++) { | |
2407 const JavaVMOption *option = args->options + index; | |
2408 if (match_option(option, "-XX:", &tail)) { | |
2409 logOption(tail); | |
2410 } | |
2411 } | |
2412 } | |
2413 | |
2414 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS | |
2415 jint result = parse_vm_init_args(args); | |
2416 if (result != JNI_OK) { | |
2417 return result; | |
2418 } | |
2419 | |
2420 #ifndef PRODUCT | |
2421 if (TraceBytecodesAt != 0) { | |
2422 TraceBytecodes = true; | |
2423 } | |
2424 if (CountCompiledCalls) { | |
2425 if (UseCounterDecay) { | |
2426 warning("UseCounterDecay disabled because CountCalls is set"); | |
2427 UseCounterDecay = false; | |
2428 } | |
2429 } | |
2430 #endif // PRODUCT | |
2431 | |
2432 if (PrintGCDetails) { | |
2433 // Turn on -verbose:gc options as well | |
2434 PrintGC = true; | |
2435 if (FLAG_IS_DEFAULT(TraceClassUnloading)) { | |
2436 TraceClassUnloading = true; | |
2437 } | |
2438 } | |
2439 | |
2440 #ifdef SERIALGC | |
2441 set_serial_gc_flags(); | |
2442 #endif // SERIALGC | |
2443 #ifdef KERNEL | |
2444 no_shared_spaces(); | |
2445 #endif // KERNEL | |
2446 | |
2447 // Set flags based on ergonomics. | |
2448 set_ergonomics_flags(); | |
2449 | |
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2450 // Check the GC selections again. |
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2451 if (!check_gc_consistency()) { |
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2452 return JNI_EINVAL; |
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2453 } |
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2454 |
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2455 if (UseParallelGC) { |
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2456 // Set some flags for ParallelGC if needed. |
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2457 set_parallel_gc_flags(); |
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2458 } else if (UseConcMarkSweepGC) { |
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2459 // Set some flags for CMS |
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2460 set_cms_and_parnew_gc_flags(); |
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2461 } else if (UseParNewGC) { |
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2462 // Set some flags for ParNew |
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2463 set_parnew_gc_flags(); |
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2464 } |
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2465 |
0 | 2466 #ifdef SERIALGC |
2467 assert(verify_serial_gc_flags(), "SerialGC unset"); | |
2468 #endif // SERIALGC | |
2469 | |
2470 // Set bytecode rewriting flags | |
2471 set_bytecode_flags(); | |
2472 | |
2473 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled. | |
2474 set_aggressive_opts_flags(); | |
2475 | |
2476 #ifdef CC_INTERP | |
2477 // Biased locking is not implemented with c++ interpreter | |
2478 FLAG_SET_DEFAULT(UseBiasedLocking, false); | |
2479 #endif /* CC_INTERP */ | |
2480 | |
2481 if (PrintCommandLineFlags) { | |
2482 CommandLineFlags::printSetFlags(); | |
2483 } | |
2484 | |
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2485 #ifdef ASSERT |
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2486 if (PrintFlagsFinal) { |
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2487 CommandLineFlags::printFlags(); |
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2488 } |
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2489 #endif |
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2490 |
0 | 2491 return JNI_OK; |
2492 } | |
2493 | |
2494 int Arguments::PropertyList_count(SystemProperty* pl) { | |
2495 int count = 0; | |
2496 while(pl != NULL) { | |
2497 count++; | |
2498 pl = pl->next(); | |
2499 } | |
2500 return count; | |
2501 } | |
2502 | |
2503 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) { | |
2504 assert(key != NULL, "just checking"); | |
2505 SystemProperty* prop; | |
2506 for (prop = pl; prop != NULL; prop = prop->next()) { | |
2507 if (strcmp(key, prop->key()) == 0) return prop->value(); | |
2508 } | |
2509 return NULL; | |
2510 } | |
2511 | |
2512 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) { | |
2513 int count = 0; | |
2514 const char* ret_val = NULL; | |
2515 | |
2516 while(pl != NULL) { | |
2517 if(count >= index) { | |
2518 ret_val = pl->key(); | |
2519 break; | |
2520 } | |
2521 count++; | |
2522 pl = pl->next(); | |
2523 } | |
2524 | |
2525 return ret_val; | |
2526 } | |
2527 | |
2528 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) { | |
2529 int count = 0; | |
2530 char* ret_val = NULL; | |
2531 | |
2532 while(pl != NULL) { | |
2533 if(count >= index) { | |
2534 ret_val = pl->value(); | |
2535 break; | |
2536 } | |
2537 count++; | |
2538 pl = pl->next(); | |
2539 } | |
2540 | |
2541 return ret_val; | |
2542 } | |
2543 | |
2544 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) { | |
2545 SystemProperty* p = *plist; | |
2546 if (p == NULL) { | |
2547 *plist = new_p; | |
2548 } else { | |
2549 while (p->next() != NULL) { | |
2550 p = p->next(); | |
2551 } | |
2552 p->set_next(new_p); | |
2553 } | |
2554 } | |
2555 | |
2556 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, char* v) { | |
2557 if (plist == NULL) | |
2558 return; | |
2559 | |
2560 SystemProperty* new_p = new SystemProperty(k, v, true); | |
2561 PropertyList_add(plist, new_p); | |
2562 } | |
2563 | |
2564 // This add maintains unique property key in the list. | |
2565 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, char* v) { | |
2566 if (plist == NULL) | |
2567 return; | |
2568 | |
2569 // If property key exist then update with new value. | |
2570 SystemProperty* prop; | |
2571 for (prop = *plist; prop != NULL; prop = prop->next()) { | |
2572 if (strcmp(k, prop->key()) == 0) { | |
2573 prop->set_value(v); | |
2574 return; | |
2575 } | |
2576 } | |
2577 | |
2578 PropertyList_add(plist, k, v); | |
2579 } | |
2580 | |
2581 #ifdef KERNEL | |
2582 char *Arguments::get_kernel_properties() { | |
2583 // Find properties starting with kernel and append them to string | |
2584 // We need to find out how long they are first because the URL's that they | |
2585 // might point to could get long. | |
2586 int length = 0; | |
2587 SystemProperty* prop; | |
2588 for (prop = _system_properties; prop != NULL; prop = prop->next()) { | |
2589 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { | |
2590 length += (strlen(prop->key()) + strlen(prop->value()) + 5); // "-D =" | |
2591 } | |
2592 } | |
2593 // Add one for null terminator. | |
2594 char *props = AllocateHeap(length + 1, "get_kernel_properties"); | |
2595 if (length != 0) { | |
2596 int pos = 0; | |
2597 for (prop = _system_properties; prop != NULL; prop = prop->next()) { | |
2598 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { | |
2599 jio_snprintf(&props[pos], length-pos, | |
2600 "-D%s=%s ", prop->key(), prop->value()); | |
2601 pos = strlen(props); | |
2602 } | |
2603 } | |
2604 } | |
2605 // null terminate props in case of null | |
2606 props[length] = '\0'; | |
2607 return props; | |
2608 } | |
2609 #endif // KERNEL | |
2610 | |
2611 // Copies src into buf, replacing "%%" with "%" and "%p" with pid | |
2612 // Returns true if all of the source pointed by src has been copied over to | |
2613 // the destination buffer pointed by buf. Otherwise, returns false. | |
2614 // Notes: | |
2615 // 1. If the length (buflen) of the destination buffer excluding the | |
2616 // NULL terminator character is not long enough for holding the expanded | |
2617 // pid characters, it also returns false instead of returning the partially | |
2618 // expanded one. | |
2619 // 2. The passed in "buflen" should be large enough to hold the null terminator. | |
2620 bool Arguments::copy_expand_pid(const char* src, size_t srclen, | |
2621 char* buf, size_t buflen) { | |
2622 const char* p = src; | |
2623 char* b = buf; | |
2624 const char* src_end = &src[srclen]; | |
2625 char* buf_end = &buf[buflen - 1]; | |
2626 | |
2627 while (p < src_end && b < buf_end) { | |
2628 if (*p == '%') { | |
2629 switch (*(++p)) { | |
2630 case '%': // "%%" ==> "%" | |
2631 *b++ = *p++; | |
2632 break; | |
2633 case 'p': { // "%p" ==> current process id | |
2634 // buf_end points to the character before the last character so | |
2635 // that we could write '\0' to the end of the buffer. | |
2636 size_t buf_sz = buf_end - b + 1; | |
2637 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id()); | |
2638 | |
2639 // if jio_snprintf fails or the buffer is not long enough to hold | |
2640 // the expanded pid, returns false. | |
2641 if (ret < 0 || ret >= (int)buf_sz) { | |
2642 return false; | |
2643 } else { | |
2644 b += ret; | |
2645 assert(*b == '\0', "fail in copy_expand_pid"); | |
2646 if (p == src_end && b == buf_end + 1) { | |
2647 // reach the end of the buffer. | |
2648 return true; | |
2649 } | |
2650 } | |
2651 p++; | |
2652 break; | |
2653 } | |
2654 default : | |
2655 *b++ = '%'; | |
2656 } | |
2657 } else { | |
2658 *b++ = *p++; | |
2659 } | |
2660 } | |
2661 *b = '\0'; | |
2662 return (p == src_end); // return false if not all of the source was copied | |
2663 } |