Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/arguments.cpp @ 1147:75bd253e25dd
6637203: Classunloading messages go to stdout rather than Xloggc file, causing hangs when stdout is closed
Summary: Decoupled TraceClassUnloading from verbose:gc, JVMTI_VERBOSE_GC and PrintGC[Details], making it settable in a manner identical to TraceClassLoading. Reverted an inadvertent change of TraceClassUnloading output in a previous changeset from gclog back to tty.
Reviewed-by: coleenp, dholmes, jmasa, poonam
author | ysr |
---|---|
date | Mon, 04 Jan 2010 14:51:26 -0800 |
parents | e018e6884bd8 |
children | 0579c695832f |
rev | line source |
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0 | 1 /* |
579 | 2 * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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::_min_heap_size = 0; | |
41 Arguments::Mode Arguments::_mode = _mixed; | |
42 bool Arguments::_java_compiler = false; | |
43 bool Arguments::_xdebug_mode = false; | |
44 const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG; | |
45 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER; | |
46 int Arguments::_sun_java_launcher_pid = -1; | |
47 | |
48 // These parameters are reset in method parse_vm_init_args(JavaVMInitArgs*) | |
49 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; | |
50 bool Arguments::_UseOnStackReplacement = UseOnStackReplacement; | |
51 bool Arguments::_BackgroundCompilation = BackgroundCompilation; | |
52 bool Arguments::_ClipInlining = ClipInlining; | |
53 intx Arguments::_Tier2CompileThreshold = Tier2CompileThreshold; | |
54 | |
55 char* Arguments::SharedArchivePath = NULL; | |
56 | |
57 AgentLibraryList Arguments::_libraryList; | |
58 AgentLibraryList Arguments::_agentList; | |
59 | |
60 abort_hook_t Arguments::_abort_hook = NULL; | |
61 exit_hook_t Arguments::_exit_hook = NULL; | |
62 vfprintf_hook_t Arguments::_vfprintf_hook = NULL; | |
63 | |
64 | |
65 SystemProperty *Arguments::_java_ext_dirs = NULL; | |
66 SystemProperty *Arguments::_java_endorsed_dirs = NULL; | |
67 SystemProperty *Arguments::_sun_boot_library_path = NULL; | |
68 SystemProperty *Arguments::_java_library_path = NULL; | |
69 SystemProperty *Arguments::_java_home = NULL; | |
70 SystemProperty *Arguments::_java_class_path = NULL; | |
71 SystemProperty *Arguments::_sun_boot_class_path = NULL; | |
72 | |
73 char* Arguments::_meta_index_path = NULL; | |
74 char* Arguments::_meta_index_dir = NULL; | |
75 | |
76 static bool force_client_mode = false; | |
77 | |
78 // Check if head of 'option' matches 'name', and sets 'tail' remaining part of option string | |
79 | |
80 static bool match_option(const JavaVMOption *option, const char* name, | |
81 const char** tail) { | |
82 int len = (int)strlen(name); | |
83 if (strncmp(option->optionString, name, len) == 0) { | |
84 *tail = option->optionString + len; | |
85 return true; | |
86 } else { | |
87 return false; | |
88 } | |
89 } | |
90 | |
91 static void logOption(const char* opt) { | |
92 if (PrintVMOptions) { | |
93 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt); | |
94 } | |
95 } | |
96 | |
97 // Process java launcher properties. | |
98 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) { | |
99 // See if sun.java.launcher or sun.java.launcher.pid is defined. | |
100 // Must do this before setting up other system properties, | |
101 // as some of them may depend on launcher type. | |
102 for (int index = 0; index < args->nOptions; index++) { | |
103 const JavaVMOption* option = args->options + index; | |
104 const char* tail; | |
105 | |
106 if (match_option(option, "-Dsun.java.launcher=", &tail)) { | |
107 process_java_launcher_argument(tail, option->extraInfo); | |
108 continue; | |
109 } | |
110 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) { | |
111 _sun_java_launcher_pid = atoi(tail); | |
112 continue; | |
113 } | |
114 } | |
115 } | |
116 | |
117 // Initialize system properties key and value. | |
118 void Arguments::init_system_properties() { | |
119 | |
120 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.version", "1.0", false)); | |
121 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name", | |
122 "Java Virtual Machine Specification", false)); | |
123 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.vendor", | |
124 "Sun Microsystems Inc.", false)); | |
125 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false)); | |
126 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false)); | |
127 PropertyList_add(&_system_properties, new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false)); | |
128 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true)); | |
129 | |
130 // following are JVMTI agent writeable properties. | |
131 // Properties values are set to NULL and they are | |
132 // os specific they are initialized in os::init_system_properties_values(). | |
133 _java_ext_dirs = new SystemProperty("java.ext.dirs", NULL, true); | |
134 _java_endorsed_dirs = new SystemProperty("java.endorsed.dirs", NULL, true); | |
135 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true); | |
136 _java_library_path = new SystemProperty("java.library.path", NULL, true); | |
137 _java_home = new SystemProperty("java.home", NULL, true); | |
138 _sun_boot_class_path = new SystemProperty("sun.boot.class.path", NULL, true); | |
139 | |
140 _java_class_path = new SystemProperty("java.class.path", "", true); | |
141 | |
142 // Add to System Property list. | |
143 PropertyList_add(&_system_properties, _java_ext_dirs); | |
144 PropertyList_add(&_system_properties, _java_endorsed_dirs); | |
145 PropertyList_add(&_system_properties, _sun_boot_library_path); | |
146 PropertyList_add(&_system_properties, _java_library_path); | |
147 PropertyList_add(&_system_properties, _java_home); | |
148 PropertyList_add(&_system_properties, _java_class_path); | |
149 PropertyList_add(&_system_properties, _sun_boot_class_path); | |
150 | |
151 // Set OS specific system properties values | |
152 os::init_system_properties_values(); | |
153 } | |
154 | |
242 | 155 /** |
156 * Provide a slightly more user-friendly way of eliminating -XX flags. | |
157 * When a flag is eliminated, it can be added to this list in order to | |
158 * continue accepting this flag on the command-line, while issuing a warning | |
159 * and ignoring the value. Once the JDK version reaches the 'accept_until' | |
160 * limit, we flatly refuse to admit the existence of the flag. This allows | |
161 * a flag to die correctly over JDK releases using HSX. | |
162 */ | |
163 typedef struct { | |
164 const char* name; | |
165 JDK_Version obsoleted_in; // when the flag went away | |
166 JDK_Version accept_until; // which version to start denying the existence | |
167 } ObsoleteFlag; | |
0 | 168 |
242 | 169 static ObsoleteFlag obsolete_jvm_flags[] = { |
170 { "UseTrainGC", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
171 { "UseSpecialLargeObjectHandling", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
172 { "UseOversizedCarHandling", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
173 { "TraceCarAllocation", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
174 { "PrintTrainGCProcessingStats", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
175 { "LogOfCarSpaceSize", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
176 { "OversizedCarThreshold", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
177 { "MinTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
178 { "DefaultTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
179 { "MaxTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
180 { "DelayTickAdjustment", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
181 { "ProcessingToTenuringRatio", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
182 { "MinTrainLength", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
183 { "AppendRatio", JDK_Version::jdk_update(6,10), JDK_Version::jdk(7) }, | |
1064 | 184 { "DefaultMaxRAM", JDK_Version::jdk_update(6,18), JDK_Version::jdk(7) }, |
185 { "DefaultInitialRAMFraction", | |
186 JDK_Version::jdk_update(6,18), JDK_Version::jdk(7) }, | |
242 | 187 { NULL, JDK_Version(0), JDK_Version(0) } |
188 }; | |
189 | |
190 // Returns true if the flag is obsolete and fits into the range specified | |
191 // for being ignored. In the case that the flag is ignored, the 'version' | |
192 // value is filled in with the version number when the flag became | |
193 // obsolete so that that value can be displayed to the user. | |
194 bool Arguments::is_newly_obsolete(const char *s, JDK_Version* version) { | |
0 | 195 int i = 0; |
242 | 196 assert(version != NULL, "Must provide a version buffer"); |
197 while (obsolete_jvm_flags[i].name != NULL) { | |
198 const ObsoleteFlag& flag_status = obsolete_jvm_flags[i]; | |
0 | 199 // <flag>=xxx form |
200 // [-|+]<flag> form | |
242 | 201 if ((strncmp(flag_status.name, s, strlen(flag_status.name)) == 0) || |
0 | 202 ((s[0] == '+' || s[0] == '-') && |
242 | 203 (strncmp(flag_status.name, &s[1], strlen(flag_status.name)) == 0))) { |
204 if (JDK_Version::current().compare(flag_status.accept_until) == -1) { | |
205 *version = flag_status.obsoleted_in; | |
206 return true; | |
207 } | |
0 | 208 } |
209 i++; | |
210 } | |
211 return false; | |
212 } | |
213 | |
214 // Constructs the system class path (aka boot class path) from the following | |
215 // components, in order: | |
216 // | |
217 // prefix // from -Xbootclasspath/p:... | |
218 // endorsed // the expansion of -Djava.endorsed.dirs=... | |
219 // base // from os::get_system_properties() or -Xbootclasspath= | |
220 // suffix // from -Xbootclasspath/a:... | |
221 // | |
222 // java.endorsed.dirs is a list of directories; any jar or zip files in the | |
223 // directories are added to the sysclasspath just before the base. | |
224 // | |
225 // This could be AllStatic, but it isn't needed after argument processing is | |
226 // complete. | |
227 class SysClassPath: public StackObj { | |
228 public: | |
229 SysClassPath(const char* base); | |
230 ~SysClassPath(); | |
231 | |
232 inline void set_base(const char* base); | |
233 inline void add_prefix(const char* prefix); | |
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234 inline void add_suffix_to_prefix(const char* suffix); |
0 | 235 inline void add_suffix(const char* suffix); |
236 inline void reset_path(const char* base); | |
237 | |
238 // Expand the jar/zip files in each directory listed by the java.endorsed.dirs | |
239 // property. Must be called after all command-line arguments have been | |
240 // processed (in particular, -Djava.endorsed.dirs=...) and before calling | |
241 // combined_path(). | |
242 void expand_endorsed(); | |
243 | |
244 inline const char* get_base() const { return _items[_scp_base]; } | |
245 inline const char* get_prefix() const { return _items[_scp_prefix]; } | |
246 inline const char* get_suffix() const { return _items[_scp_suffix]; } | |
247 inline const char* get_endorsed() const { return _items[_scp_endorsed]; } | |
248 | |
249 // Combine all the components into a single c-heap-allocated string; caller | |
250 // must free the string if/when no longer needed. | |
251 char* combined_path(); | |
252 | |
253 private: | |
254 // Utility routines. | |
255 static char* add_to_path(const char* path, const char* str, bool prepend); | |
256 static char* add_jars_to_path(char* path, const char* directory); | |
257 | |
258 inline void reset_item_at(int index); | |
259 | |
260 // Array indices for the items that make up the sysclasspath. All except the | |
261 // base are allocated in the C heap and freed by this class. | |
262 enum { | |
263 _scp_prefix, // from -Xbootclasspath/p:... | |
264 _scp_endorsed, // the expansion of -Djava.endorsed.dirs=... | |
265 _scp_base, // the default sysclasspath | |
266 _scp_suffix, // from -Xbootclasspath/a:... | |
267 _scp_nitems // the number of items, must be last. | |
268 }; | |
269 | |
270 const char* _items[_scp_nitems]; | |
271 DEBUG_ONLY(bool _expansion_done;) | |
272 }; | |
273 | |
274 SysClassPath::SysClassPath(const char* base) { | |
275 memset(_items, 0, sizeof(_items)); | |
276 _items[_scp_base] = base; | |
277 DEBUG_ONLY(_expansion_done = false;) | |
278 } | |
279 | |
280 SysClassPath::~SysClassPath() { | |
281 // Free everything except the base. | |
282 for (int i = 0; i < _scp_nitems; ++i) { | |
283 if (i != _scp_base) reset_item_at(i); | |
284 } | |
285 DEBUG_ONLY(_expansion_done = false;) | |
286 } | |
287 | |
288 inline void SysClassPath::set_base(const char* base) { | |
289 _items[_scp_base] = base; | |
290 } | |
291 | |
292 inline void SysClassPath::add_prefix(const char* prefix) { | |
293 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], prefix, true); | |
294 } | |
295 | |
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296 inline void SysClassPath::add_suffix_to_prefix(const char* suffix) { |
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297 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], suffix, false); |
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298 } |
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299 |
0 | 300 inline void SysClassPath::add_suffix(const char* suffix) { |
301 _items[_scp_suffix] = add_to_path(_items[_scp_suffix], suffix, false); | |
302 } | |
303 | |
304 inline void SysClassPath::reset_item_at(int index) { | |
305 assert(index < _scp_nitems && index != _scp_base, "just checking"); | |
306 if (_items[index] != NULL) { | |
307 FREE_C_HEAP_ARRAY(char, _items[index]); | |
308 _items[index] = NULL; | |
309 } | |
310 } | |
311 | |
312 inline void SysClassPath::reset_path(const char* base) { | |
313 // Clear the prefix and suffix. | |
314 reset_item_at(_scp_prefix); | |
315 reset_item_at(_scp_suffix); | |
316 set_base(base); | |
317 } | |
318 | |
319 //------------------------------------------------------------------------------ | |
320 | |
321 void SysClassPath::expand_endorsed() { | |
322 assert(_items[_scp_endorsed] == NULL, "can only be called once."); | |
323 | |
324 const char* path = Arguments::get_property("java.endorsed.dirs"); | |
325 if (path == NULL) { | |
326 path = Arguments::get_endorsed_dir(); | |
327 assert(path != NULL, "no default for java.endorsed.dirs"); | |
328 } | |
329 | |
330 char* expanded_path = NULL; | |
331 const char separator = *os::path_separator(); | |
332 const char* const end = path + strlen(path); | |
333 while (path < end) { | |
334 const char* tmp_end = strchr(path, separator); | |
335 if (tmp_end == NULL) { | |
336 expanded_path = add_jars_to_path(expanded_path, path); | |
337 path = end; | |
338 } else { | |
339 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1); | |
340 memcpy(dirpath, path, tmp_end - path); | |
341 dirpath[tmp_end - path] = '\0'; | |
342 expanded_path = add_jars_to_path(expanded_path, dirpath); | |
343 FREE_C_HEAP_ARRAY(char, dirpath); | |
344 path = tmp_end + 1; | |
345 } | |
346 } | |
347 _items[_scp_endorsed] = expanded_path; | |
348 DEBUG_ONLY(_expansion_done = true;) | |
349 } | |
350 | |
351 // Combine the bootclasspath elements, some of which may be null, into a single | |
352 // c-heap-allocated string. | |
353 char* SysClassPath::combined_path() { | |
354 assert(_items[_scp_base] != NULL, "empty default sysclasspath"); | |
355 assert(_expansion_done, "must call expand_endorsed() first."); | |
356 | |
357 size_t lengths[_scp_nitems]; | |
358 size_t total_len = 0; | |
359 | |
360 const char separator = *os::path_separator(); | |
361 | |
362 // Get the lengths. | |
363 int i; | |
364 for (i = 0; i < _scp_nitems; ++i) { | |
365 if (_items[i] != NULL) { | |
366 lengths[i] = strlen(_items[i]); | |
367 // Include space for the separator char (or a NULL for the last item). | |
368 total_len += lengths[i] + 1; | |
369 } | |
370 } | |
371 assert(total_len > 0, "empty sysclasspath not allowed"); | |
372 | |
373 // Copy the _items to a single string. | |
374 char* cp = NEW_C_HEAP_ARRAY(char, total_len); | |
375 char* cp_tmp = cp; | |
376 for (i = 0; i < _scp_nitems; ++i) { | |
377 if (_items[i] != NULL) { | |
378 memcpy(cp_tmp, _items[i], lengths[i]); | |
379 cp_tmp += lengths[i]; | |
380 *cp_tmp++ = separator; | |
381 } | |
382 } | |
383 *--cp_tmp = '\0'; // Replace the extra separator. | |
384 return cp; | |
385 } | |
386 | |
387 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null. | |
388 char* | |
389 SysClassPath::add_to_path(const char* path, const char* str, bool prepend) { | |
390 char *cp; | |
391 | |
392 assert(str != NULL, "just checking"); | |
393 if (path == NULL) { | |
394 size_t len = strlen(str) + 1; | |
395 cp = NEW_C_HEAP_ARRAY(char, len); | |
396 memcpy(cp, str, len); // copy the trailing null | |
397 } else { | |
398 const char separator = *os::path_separator(); | |
399 size_t old_len = strlen(path); | |
400 size_t str_len = strlen(str); | |
401 size_t len = old_len + str_len + 2; | |
402 | |
403 if (prepend) { | |
404 cp = NEW_C_HEAP_ARRAY(char, len); | |
405 char* cp_tmp = cp; | |
406 memcpy(cp_tmp, str, str_len); | |
407 cp_tmp += str_len; | |
408 *cp_tmp = separator; | |
409 memcpy(++cp_tmp, path, old_len + 1); // copy the trailing null | |
410 FREE_C_HEAP_ARRAY(char, path); | |
411 } else { | |
412 cp = REALLOC_C_HEAP_ARRAY(char, path, len); | |
413 char* cp_tmp = cp + old_len; | |
414 *cp_tmp = separator; | |
415 memcpy(++cp_tmp, str, str_len + 1); // copy the trailing null | |
416 } | |
417 } | |
418 return cp; | |
419 } | |
420 | |
421 // Scan the directory and append any jar or zip files found to path. | |
422 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null. | |
423 char* SysClassPath::add_jars_to_path(char* path, const char* directory) { | |
424 DIR* dir = os::opendir(directory); | |
425 if (dir == NULL) return path; | |
426 | |
427 char dir_sep[2] = { '\0', '\0' }; | |
428 size_t directory_len = strlen(directory); | |
429 const char fileSep = *os::file_separator(); | |
430 if (directory[directory_len - 1] != fileSep) dir_sep[0] = fileSep; | |
431 | |
432 /* Scan the directory for jars/zips, appending them to path. */ | |
433 struct dirent *entry; | |
434 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory)); | |
435 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL) { | |
436 const char* name = entry->d_name; | |
437 const char* ext = name + strlen(name) - 4; | |
438 bool isJarOrZip = ext > name && | |
439 (os::file_name_strcmp(ext, ".jar") == 0 || | |
440 os::file_name_strcmp(ext, ".zip") == 0); | |
441 if (isJarOrZip) { | |
442 char* jarpath = NEW_C_HEAP_ARRAY(char, directory_len + 2 + strlen(name)); | |
443 sprintf(jarpath, "%s%s%s", directory, dir_sep, name); | |
444 path = add_to_path(path, jarpath, false); | |
445 FREE_C_HEAP_ARRAY(char, jarpath); | |
446 } | |
447 } | |
448 FREE_C_HEAP_ARRAY(char, dbuf); | |
449 os::closedir(dir); | |
450 return path; | |
451 } | |
452 | |
453 // Parses a memory size specification string. | |
489
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454 static bool atomull(const char *s, julong* result) { |
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455 julong n = 0; |
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456 int args_read = sscanf(s, os::julong_format_specifier(), &n); |
0 | 457 if (args_read != 1) { |
458 return false; | |
459 } | |
460 while (*s != '\0' && isdigit(*s)) { | |
461 s++; | |
462 } | |
463 // 4705540: illegal if more characters are found after the first non-digit | |
464 if (strlen(s) > 1) { | |
465 return false; | |
466 } | |
467 switch (*s) { | |
468 case 'T': case 't': | |
469 *result = n * G * K; | |
489
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470 // Check for overflow. |
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471 if (*result/((julong)G * K) != n) return false; |
0 | 472 return true; |
473 case 'G': case 'g': | |
474 *result = n * G; | |
489
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475 if (*result/G != n) return false; |
0 | 476 return true; |
477 case 'M': case 'm': | |
478 *result = n * M; | |
489
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479 if (*result/M != n) return false; |
0 | 480 return true; |
481 case 'K': case 'k': | |
482 *result = n * K; | |
489
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483 if (*result/K != n) return false; |
0 | 484 return true; |
485 case '\0': | |
486 *result = n; | |
487 return true; | |
488 default: | |
489 return false; | |
490 } | |
491 } | |
492 | |
489
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493 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size) { |
0 | 494 if (size < min_size) return arg_too_small; |
495 // Check that size will fit in a size_t (only relevant on 32-bit) | |
489
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496 if (size > max_uintx) return arg_too_big; |
0 | 497 return arg_in_range; |
498 } | |
499 | |
500 // Describe an argument out of range error | |
501 void Arguments::describe_range_error(ArgsRange errcode) { | |
502 switch(errcode) { | |
503 case arg_too_big: | |
504 jio_fprintf(defaultStream::error_stream(), | |
505 "The specified size exceeds the maximum " | |
506 "representable size.\n"); | |
507 break; | |
508 case arg_too_small: | |
509 case arg_unreadable: | |
510 case arg_in_range: | |
511 // do nothing for now | |
512 break; | |
513 default: | |
514 ShouldNotReachHere(); | |
515 } | |
516 } | |
517 | |
518 static bool set_bool_flag(char* name, bool value, FlagValueOrigin origin) { | |
519 return CommandLineFlags::boolAtPut(name, &value, origin); | |
520 } | |
521 | |
522 static bool set_fp_numeric_flag(char* name, char* value, FlagValueOrigin origin) { | |
523 double v; | |
524 if (sscanf(value, "%lf", &v) != 1) { | |
525 return false; | |
526 } | |
527 | |
528 if (CommandLineFlags::doubleAtPut(name, &v, origin)) { | |
529 return true; | |
530 } | |
531 return false; | |
532 } | |
533 | |
534 static bool set_numeric_flag(char* name, char* value, FlagValueOrigin origin) { | |
489
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535 julong v; |
0 | 536 intx intx_v; |
537 bool is_neg = false; | |
489
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538 // Check the sign first since atomull() parses only unsigned values. |
0 | 539 if (*value == '-') { |
540 if (!CommandLineFlags::intxAt(name, &intx_v)) { | |
541 return false; | |
542 } | |
543 value++; | |
544 is_neg = true; | |
545 } | |
489
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546 if (!atomull(value, &v)) { |
0 | 547 return false; |
548 } | |
549 intx_v = (intx) v; | |
550 if (is_neg) { | |
551 intx_v = -intx_v; | |
552 } | |
553 if (CommandLineFlags::intxAtPut(name, &intx_v, origin)) { | |
554 return true; | |
555 } | |
556 uintx uintx_v = (uintx) v; | |
557 if (!is_neg && CommandLineFlags::uintxAtPut(name, &uintx_v, origin)) { | |
558 return true; | |
559 } | |
1064 | 560 uint64_t uint64_t_v = (uint64_t) v; |
561 if (!is_neg && CommandLineFlags::uint64_tAtPut(name, &uint64_t_v, origin)) { | |
562 return true; | |
563 } | |
0 | 564 return false; |
565 } | |
566 | |
567 static bool set_string_flag(char* name, const char* value, FlagValueOrigin origin) { | |
568 if (!CommandLineFlags::ccstrAtPut(name, &value, origin)) return false; | |
569 // Contract: CommandLineFlags always returns a pointer that needs freeing. | |
570 FREE_C_HEAP_ARRAY(char, value); | |
571 return true; | |
572 } | |
573 | |
574 static bool append_to_string_flag(char* name, const char* new_value, FlagValueOrigin origin) { | |
575 const char* old_value = ""; | |
576 if (!CommandLineFlags::ccstrAt(name, &old_value)) return false; | |
577 size_t old_len = old_value != NULL ? strlen(old_value) : 0; | |
578 size_t new_len = strlen(new_value); | |
579 const char* value; | |
580 char* free_this_too = NULL; | |
581 if (old_len == 0) { | |
582 value = new_value; | |
583 } else if (new_len == 0) { | |
584 value = old_value; | |
585 } else { | |
586 char* buf = NEW_C_HEAP_ARRAY(char, old_len + 1 + new_len + 1); | |
587 // each new setting adds another LINE to the switch: | |
588 sprintf(buf, "%s\n%s", old_value, new_value); | |
589 value = buf; | |
590 free_this_too = buf; | |
591 } | |
592 (void) CommandLineFlags::ccstrAtPut(name, &value, origin); | |
593 // CommandLineFlags always returns a pointer that needs freeing. | |
594 FREE_C_HEAP_ARRAY(char, value); | |
595 if (free_this_too != NULL) { | |
596 // CommandLineFlags made its own copy, so I must delete my own temp. buffer. | |
597 FREE_C_HEAP_ARRAY(char, free_this_too); | |
598 } | |
599 return true; | |
600 } | |
601 | |
602 bool Arguments::parse_argument(const char* arg, FlagValueOrigin origin) { | |
603 | |
604 // range of acceptable characters spelled out for portability reasons | |
605 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]" | |
606 #define BUFLEN 255 | |
607 char name[BUFLEN+1]; | |
608 char dummy; | |
609 | |
610 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { | |
611 return set_bool_flag(name, false, origin); | |
612 } | |
613 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { | |
614 return set_bool_flag(name, true, origin); | |
615 } | |
616 | |
617 char punct; | |
618 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') { | |
619 const char* value = strchr(arg, '=') + 1; | |
620 Flag* flag = Flag::find_flag(name, strlen(name)); | |
621 if (flag != NULL && flag->is_ccstr()) { | |
622 if (flag->ccstr_accumulates()) { | |
623 return append_to_string_flag(name, value, origin); | |
624 } else { | |
625 if (value[0] == '\0') { | |
626 value = NULL; | |
627 } | |
628 return set_string_flag(name, value, origin); | |
629 } | |
630 } | |
631 } | |
632 | |
633 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') { | |
634 const char* value = strchr(arg, '=') + 1; | |
635 // -XX:Foo:=xxx will reset the string flag to the given value. | |
636 if (value[0] == '\0') { | |
637 value = NULL; | |
638 } | |
639 return set_string_flag(name, value, origin); | |
640 } | |
641 | |
642 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.]" | |
643 #define SIGNED_NUMBER_RANGE "[-0123456789]" | |
644 #define NUMBER_RANGE "[0123456789]" | |
645 char value[BUFLEN + 1]; | |
646 char value2[BUFLEN + 1]; | |
647 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) { | |
648 // Looks like a floating-point number -- try again with more lenient format string | |
649 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) { | |
650 return set_fp_numeric_flag(name, value, origin); | |
651 } | |
652 } | |
653 | |
654 #define VALUE_RANGE "[-kmgtKMGT0123456789]" | |
655 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) { | |
656 return set_numeric_flag(name, value, origin); | |
657 } | |
658 | |
659 return false; | |
660 } | |
661 | |
662 void Arguments::add_string(char*** bldarray, int* count, const char* arg) { | |
663 assert(bldarray != NULL, "illegal argument"); | |
664 | |
665 if (arg == NULL) { | |
666 return; | |
667 } | |
668 | |
669 int index = *count; | |
670 | |
671 // expand the array and add arg to the last element | |
672 (*count)++; | |
673 if (*bldarray == NULL) { | |
674 *bldarray = NEW_C_HEAP_ARRAY(char*, *count); | |
675 } else { | |
676 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, *count); | |
677 } | |
678 (*bldarray)[index] = strdup(arg); | |
679 } | |
680 | |
681 void Arguments::build_jvm_args(const char* arg) { | |
682 add_string(&_jvm_args_array, &_num_jvm_args, arg); | |
683 } | |
684 | |
685 void Arguments::build_jvm_flags(const char* arg) { | |
686 add_string(&_jvm_flags_array, &_num_jvm_flags, arg); | |
687 } | |
688 | |
689 // utility function to return a string that concatenates all | |
690 // strings in a given char** array | |
691 const char* Arguments::build_resource_string(char** args, int count) { | |
692 if (args == NULL || count == 0) { | |
693 return NULL; | |
694 } | |
695 size_t length = strlen(args[0]) + 1; // add 1 for the null terminator | |
696 for (int i = 1; i < count; i++) { | |
697 length += strlen(args[i]) + 1; // add 1 for a space | |
698 } | |
699 char* s = NEW_RESOURCE_ARRAY(char, length); | |
700 strcpy(s, args[0]); | |
701 for (int j = 1; j < count; j++) { | |
702 strcat(s, " "); | |
703 strcat(s, args[j]); | |
704 } | |
705 return (const char*) s; | |
706 } | |
707 | |
708 void Arguments::print_on(outputStream* st) { | |
709 st->print_cr("VM Arguments:"); | |
710 if (num_jvm_flags() > 0) { | |
711 st->print("jvm_flags: "); print_jvm_flags_on(st); | |
712 } | |
713 if (num_jvm_args() > 0) { | |
714 st->print("jvm_args: "); print_jvm_args_on(st); | |
715 } | |
716 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>"); | |
717 st->print_cr("Launcher Type: %s", _sun_java_launcher); | |
718 } | |
719 | |
720 void Arguments::print_jvm_flags_on(outputStream* st) { | |
721 if (_num_jvm_flags > 0) { | |
722 for (int i=0; i < _num_jvm_flags; i++) { | |
723 st->print("%s ", _jvm_flags_array[i]); | |
724 } | |
725 st->print_cr(""); | |
726 } | |
727 } | |
728 | |
729 void Arguments::print_jvm_args_on(outputStream* st) { | |
730 if (_num_jvm_args > 0) { | |
731 for (int i=0; i < _num_jvm_args; i++) { | |
732 st->print("%s ", _jvm_args_array[i]); | |
733 } | |
734 st->print_cr(""); | |
735 } | |
736 } | |
737 | |
242 | 738 bool Arguments::process_argument(const char* arg, |
739 jboolean ignore_unrecognized, FlagValueOrigin origin) { | |
740 | |
741 JDK_Version since = JDK_Version(); | |
0 | 742 |
743 if (parse_argument(arg, origin)) { | |
744 // do nothing | |
242 | 745 } else if (is_newly_obsolete(arg, &since)) { |
746 enum { bufsize = 256 }; | |
747 char buffer[bufsize]; | |
748 since.to_string(buffer, bufsize); | |
0 | 749 jio_fprintf(defaultStream::error_stream(), |
242 | 750 "Warning: The flag %s has been EOL'd as of %s and will" |
751 " be ignored\n", arg, buffer); | |
0 | 752 } else { |
753 if (!ignore_unrecognized) { | |
754 jio_fprintf(defaultStream::error_stream(), | |
755 "Unrecognized VM option '%s'\n", arg); | |
756 // allow for commandline "commenting out" options like -XX:#+Verbose | |
757 if (strlen(arg) == 0 || arg[0] != '#') { | |
758 return false; | |
759 } | |
760 } | |
761 } | |
762 return true; | |
763 } | |
764 | |
765 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) { | |
766 FILE* stream = fopen(file_name, "rb"); | |
767 if (stream == NULL) { | |
768 if (should_exist) { | |
769 jio_fprintf(defaultStream::error_stream(), | |
770 "Could not open settings file %s\n", file_name); | |
771 return false; | |
772 } else { | |
773 return true; | |
774 } | |
775 } | |
776 | |
777 char token[1024]; | |
778 int pos = 0; | |
779 | |
780 bool in_white_space = true; | |
781 bool in_comment = false; | |
782 bool in_quote = false; | |
783 char quote_c = 0; | |
784 bool result = true; | |
785 | |
786 int c = getc(stream); | |
787 while(c != EOF) { | |
788 if (in_white_space) { | |
789 if (in_comment) { | |
790 if (c == '\n') in_comment = false; | |
791 } else { | |
792 if (c == '#') in_comment = true; | |
793 else if (!isspace(c)) { | |
794 in_white_space = false; | |
795 token[pos++] = c; | |
796 } | |
797 } | |
798 } else { | |
799 if (c == '\n' || (!in_quote && isspace(c))) { | |
800 // token ends at newline, or at unquoted whitespace | |
801 // this allows a way to include spaces in string-valued options | |
802 token[pos] = '\0'; | |
803 logOption(token); | |
804 result &= process_argument(token, ignore_unrecognized, CONFIG_FILE); | |
805 build_jvm_flags(token); | |
806 pos = 0; | |
807 in_white_space = true; | |
808 in_quote = false; | |
809 } else if (!in_quote && (c == '\'' || c == '"')) { | |
810 in_quote = true; | |
811 quote_c = c; | |
812 } else if (in_quote && (c == quote_c)) { | |
813 in_quote = false; | |
814 } else { | |
815 token[pos++] = c; | |
816 } | |
817 } | |
818 c = getc(stream); | |
819 } | |
820 if (pos > 0) { | |
821 token[pos] = '\0'; | |
822 result &= process_argument(token, ignore_unrecognized, CONFIG_FILE); | |
823 build_jvm_flags(token); | |
824 } | |
825 fclose(stream); | |
826 return result; | |
827 } | |
828 | |
829 //============================================================================================================= | |
830 // Parsing of properties (-D) | |
831 | |
832 const char* Arguments::get_property(const char* key) { | |
833 return PropertyList_get_value(system_properties(), key); | |
834 } | |
835 | |
836 bool Arguments::add_property(const char* prop) { | |
837 const char* eq = strchr(prop, '='); | |
838 char* key; | |
839 // ns must be static--its address may be stored in a SystemProperty object. | |
840 const static char ns[1] = {0}; | |
841 char* value = (char *)ns; | |
842 | |
843 size_t key_len = (eq == NULL) ? strlen(prop) : (eq - prop); | |
844 key = AllocateHeap(key_len + 1, "add_property"); | |
845 strncpy(key, prop, key_len); | |
846 key[key_len] = '\0'; | |
847 | |
848 if (eq != NULL) { | |
849 size_t value_len = strlen(prop) - key_len - 1; | |
850 value = AllocateHeap(value_len + 1, "add_property"); | |
851 strncpy(value, &prop[key_len + 1], value_len + 1); | |
852 } | |
853 | |
854 if (strcmp(key, "java.compiler") == 0) { | |
855 process_java_compiler_argument(value); | |
856 FreeHeap(key); | |
857 if (eq != NULL) { | |
858 FreeHeap(value); | |
859 } | |
860 return true; | |
691 | 861 } else if (strcmp(key, "sun.java.command") == 0) { |
0 | 862 _java_command = value; |
863 | |
864 // don't add this property to the properties exposed to the java application | |
865 FreeHeap(key); | |
866 return true; | |
691 | 867 } else if (strcmp(key, "sun.java.launcher.pid") == 0) { |
0 | 868 // launcher.pid property is private and is processed |
869 // in process_sun_java_launcher_properties(); | |
870 // the sun.java.launcher property is passed on to the java application | |
871 FreeHeap(key); | |
872 if (eq != NULL) { | |
873 FreeHeap(value); | |
874 } | |
875 return true; | |
691 | 876 } else if (strcmp(key, "java.vendor.url.bug") == 0) { |
0 | 877 // save it in _java_vendor_url_bug, so JVM fatal error handler can access |
878 // its value without going through the property list or making a Java call. | |
879 _java_vendor_url_bug = value; | |
691 | 880 } else if (strcmp(key, "sun.boot.library.path") == 0) { |
881 PropertyList_unique_add(&_system_properties, key, value, true); | |
882 return true; | |
0 | 883 } |
884 // Create new property and add at the end of the list | |
885 PropertyList_unique_add(&_system_properties, key, value); | |
886 return true; | |
887 } | |
888 | |
889 //=========================================================================================================== | |
890 // Setting int/mixed/comp mode flags | |
891 | |
892 void Arguments::set_mode_flags(Mode mode) { | |
893 // Set up default values for all flags. | |
894 // If you add a flag to any of the branches below, | |
895 // add a default value for it here. | |
896 set_java_compiler(false); | |
897 _mode = mode; | |
898 | |
899 // Ensure Agent_OnLoad has the correct initial values. | |
900 // This may not be the final mode; mode may change later in onload phase. | |
901 PropertyList_unique_add(&_system_properties, "java.vm.info", | |
691 | 902 (char*)Abstract_VM_Version::vm_info_string(), false); |
0 | 903 |
904 UseInterpreter = true; | |
905 UseCompiler = true; | |
906 UseLoopCounter = true; | |
907 | |
908 // Default values may be platform/compiler dependent - | |
909 // use the saved values | |
910 ClipInlining = Arguments::_ClipInlining; | |
911 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods; | |
912 UseOnStackReplacement = Arguments::_UseOnStackReplacement; | |
913 BackgroundCompilation = Arguments::_BackgroundCompilation; | |
914 Tier2CompileThreshold = Arguments::_Tier2CompileThreshold; | |
915 | |
916 // Change from defaults based on mode | |
917 switch (mode) { | |
918 default: | |
919 ShouldNotReachHere(); | |
920 break; | |
921 case _int: | |
922 UseCompiler = false; | |
923 UseLoopCounter = false; | |
924 AlwaysCompileLoopMethods = false; | |
925 UseOnStackReplacement = false; | |
926 break; | |
927 case _mixed: | |
928 // same as default | |
929 break; | |
930 case _comp: | |
931 UseInterpreter = false; | |
932 BackgroundCompilation = false; | |
933 ClipInlining = false; | |
934 break; | |
935 } | |
936 } | |
937 | |
938 // Conflict: required to use shared spaces (-Xshare:on), but | |
939 // incompatible command line options were chosen. | |
940 | |
941 static void no_shared_spaces() { | |
942 if (RequireSharedSpaces) { | |
943 jio_fprintf(defaultStream::error_stream(), | |
944 "Class data sharing is inconsistent with other specified options.\n"); | |
945 vm_exit_during_initialization("Unable to use shared archive.", NULL); | |
946 } else { | |
947 FLAG_SET_DEFAULT(UseSharedSpaces, false); | |
948 } | |
949 } | |
950 | |
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951 #ifndef KERNEL |
0 | 952 // If the user has chosen ParallelGCThreads > 0, we set UseParNewGC |
953 // if it's not explictly set or unset. If the user has chosen | |
954 // UseParNewGC and not explicitly set ParallelGCThreads we | |
955 // set it, unless this is a single cpu machine. | |
956 void Arguments::set_parnew_gc_flags() { | |
1064 | 957 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC && !UseG1GC, |
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958 "control point invariant"); |
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959 assert(UseParNewGC, "Error"); |
0 | 960 |
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961 // Turn off AdaptiveSizePolicy by default for parnew until it is |
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962 // complete. |
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963 if (FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) { |
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964 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); |
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965 } |
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966 |
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967 if (ParallelGCThreads == 0) { |
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968 FLAG_SET_DEFAULT(ParallelGCThreads, |
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969 Abstract_VM_Version::parallel_worker_threads()); |
1064 | 970 if (ParallelGCThreads == 1) { |
0 | 971 FLAG_SET_DEFAULT(UseParNewGC, false); |
1064 | 972 FLAG_SET_DEFAULT(ParallelGCThreads, 0); |
0 | 973 } |
974 } | |
1064 | 975 if (UseParNewGC) { |
976 // CDS doesn't work with ParNew yet | |
0 | 977 no_shared_spaces(); |
978 | |
695 | 979 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 respectively, |
0 | 980 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration |
981 // we set them to 1024 and 1024. | |
982 // See CR 6362902. | |
983 if (FLAG_IS_DEFAULT(YoungPLABSize)) { | |
984 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024); | |
985 } | |
986 if (FLAG_IS_DEFAULT(OldPLABSize)) { | |
987 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024); | |
988 } | |
989 | |
1064 | 990 // AlwaysTenure flag should make ParNew promote all at first collection. |
0 | 991 // See CR 6362902. |
992 if (AlwaysTenure) { | |
993 FLAG_SET_CMDLINE(intx, MaxTenuringThreshold, 0); | |
994 } | |
695 | 995 // When using compressed oops, we use local overflow stacks, |
996 // rather than using a global overflow list chained through | |
997 // the klass word of the object's pre-image. | |
998 if (UseCompressedOops && !ParGCUseLocalOverflow) { | |
999 if (!FLAG_IS_DEFAULT(ParGCUseLocalOverflow)) { | |
1000 warning("Forcing +ParGCUseLocalOverflow: needed if using compressed references"); | |
1001 } | |
1002 FLAG_SET_DEFAULT(ParGCUseLocalOverflow, true); | |
1003 } | |
1004 assert(ParGCUseLocalOverflow || !UseCompressedOops, "Error"); | |
0 | 1005 } |
1006 } | |
1007 | |
1008 // Adjust some sizes to suit CMS and/or ParNew needs; these work well on | |
1009 // sparc/solaris for certain applications, but would gain from | |
1010 // further optimization and tuning efforts, and would almost | |
1011 // certainly gain from analysis of platform and environment. | |
1012 void Arguments::set_cms_and_parnew_gc_flags() { | |
1064 | 1013 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC, "Error"); |
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1014 assert(UseConcMarkSweepGC, "CMS is expected to be on here"); |
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1015 |
0 | 1016 // If we are using CMS, we prefer to UseParNewGC, |
1017 // unless explicitly forbidden. | |
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1018 if (FLAG_IS_DEFAULT(UseParNewGC)) { |
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1019 FLAG_SET_ERGO(bool, UseParNewGC, true); |
0 | 1020 } |
1021 | |
1022 // Turn off AdaptiveSizePolicy by default for cms until it is | |
10
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1023 // complete. |
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1024 if (FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) { |
0 | 1025 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); |
1026 } | |
1027 | |
1028 // In either case, adjust ParallelGCThreads and/or UseParNewGC | |
1029 // as needed. | |
10
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1030 if (UseParNewGC) { |
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1031 set_parnew_gc_flags(); |
0 | 1032 } |
1033 | |
1034 // Now make adjustments for CMS | |
1035 size_t young_gen_per_worker; | |
1036 intx new_ratio; | |
1037 size_t min_new_default; | |
1038 intx tenuring_default; | |
1039 if (CMSUseOldDefaults) { // old defaults: "old" as of 6.0 | |
1040 if FLAG_IS_DEFAULT(CMSYoungGenPerWorker) { | |
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1041 FLAG_SET_ERGO(intx, CMSYoungGenPerWorker, 4*M); |
0 | 1042 } |
1043 young_gen_per_worker = 4*M; | |
1044 new_ratio = (intx)15; | |
1045 min_new_default = 4*M; | |
1046 tenuring_default = (intx)0; | |
1047 } else { // new defaults: "new" as of 6.0 | |
1048 young_gen_per_worker = CMSYoungGenPerWorker; | |
1049 new_ratio = (intx)7; | |
1050 min_new_default = 16*M; | |
1051 tenuring_default = (intx)4; | |
1052 } | |
1053 | |
1054 // Preferred young gen size for "short" pauses | |
1055 const uintx parallel_gc_threads = | |
1056 (ParallelGCThreads == 0 ? 1 : ParallelGCThreads); | |
1057 const size_t preferred_max_new_size_unaligned = | |
1058 ScaleForWordSize(young_gen_per_worker * parallel_gc_threads); | |
1059 const size_t preferred_max_new_size = | |
1060 align_size_up(preferred_max_new_size_unaligned, os::vm_page_size()); | |
1061 | |
1062 // Unless explicitly requested otherwise, size young gen | |
1063 // for "short" pauses ~ 4M*ParallelGCThreads | |
886
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1064 |
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1065 // If either MaxNewSize or NewRatio is set on the command line, |
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1066 // assume the user is trying to set the size of the young gen. |
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1067 |
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1068 if (FLAG_IS_DEFAULT(MaxNewSize) && FLAG_IS_DEFAULT(NewRatio)) { |
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1069 |
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1070 // Set MaxNewSize to our calculated preferred_max_new_size unless |
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1071 // NewSize was set on the command line and it is larger than |
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1072 // preferred_max_new_size. |
0 | 1073 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line |
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1074 FLAG_SET_ERGO(uintx, MaxNewSize, MAX2(NewSize, preferred_max_new_size)); |
0 | 1075 } else { |
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1076 FLAG_SET_ERGO(uintx, MaxNewSize, preferred_max_new_size); |
0 | 1077 } |
1064 | 1078 if (PrintGCDetails && Verbose) { |
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1079 // Too early to use gclog_or_tty |
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1080 tty->print_cr("Ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize); |
886
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1081 } |
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1082 |
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1083 // Unless explicitly requested otherwise, prefer a large |
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1084 // Old to Young gen size so as to shift the collection load |
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1085 // to the old generation concurrent collector |
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1086 |
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1087 // If this is only guarded by FLAG_IS_DEFAULT(NewRatio) |
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1088 // then NewSize and OldSize may be calculated. That would |
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1089 // generally lead to some differences with ParNewGC for which |
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1090 // there was no obvious reason. Also limit to the case where |
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1091 // MaxNewSize has not been set. |
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1092 |
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1093 FLAG_SET_ERGO(intx, NewRatio, MAX2(NewRatio, new_ratio)); |
0 | 1094 |
886
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1095 // Code along this path potentially sets NewSize and OldSize |
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1096 |
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1097 // Calculate the desired minimum size of the young gen but if |
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1098 // NewSize has been set on the command line, use it here since |
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1099 // it should be the final value. |
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1100 size_t min_new; |
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1101 if (FLAG_IS_DEFAULT(NewSize)) { |
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1102 min_new = align_size_up(ScaleForWordSize(min_new_default), |
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1103 os::vm_page_size()); |
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1104 } else { |
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1105 min_new = NewSize; |
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1106 } |
1064 | 1107 size_t prev_initial_size = InitialHeapSize; |
1108 if (prev_initial_size != 0 && prev_initial_size < min_new + OldSize) { | |
1109 FLAG_SET_ERGO(uintx, InitialHeapSize, min_new + OldSize); | |
0 | 1110 // Currently minimum size and the initial heap sizes are the same. |
1064 | 1111 set_min_heap_size(InitialHeapSize); |
0 | 1112 if (PrintGCDetails && Verbose) { |
1113 warning("Initial heap size increased to " SIZE_FORMAT " M from " | |
1114 SIZE_FORMAT " M; use -XX:NewSize=... for finer control.", | |
1064 | 1115 InitialHeapSize/M, prev_initial_size/M); |
0 | 1116 } |
1117 } | |
886
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1118 |
0 | 1119 // MaxHeapSize is aligned down in collectorPolicy |
886
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1120 size_t max_heap = |
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1121 align_size_down(MaxHeapSize, |
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1122 CardTableRS::ct_max_alignment_constraint()); |
0 | 1123 |
1064 | 1124 if (PrintGCDetails && Verbose) { |
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1125 // Too early to use gclog_or_tty |
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1126 tty->print_cr("CMS set min_heap_size: " SIZE_FORMAT |
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1127 " initial_heap_size: " SIZE_FORMAT |
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1128 " max_heap: " SIZE_FORMAT, |
1064 | 1129 min_heap_size(), InitialHeapSize, max_heap); |
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1130 } |
0 | 1131 if (max_heap > min_new) { |
1132 // Unless explicitly requested otherwise, make young gen | |
1133 // at least min_new, and at most preferred_max_new_size. | |
1134 if (FLAG_IS_DEFAULT(NewSize)) { | |
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1135 FLAG_SET_ERGO(uintx, NewSize, MAX2(NewSize, min_new)); |
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1136 FLAG_SET_ERGO(uintx, NewSize, MIN2(preferred_max_new_size, NewSize)); |
1064 | 1137 if (PrintGCDetails && Verbose) { |
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1138 // Too early to use gclog_or_tty |
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1139 tty->print_cr("Ergo set NewSize: " SIZE_FORMAT, NewSize); |
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1140 } |
0 | 1141 } |
1142 // Unless explicitly requested otherwise, size old gen | |
1143 // so that it's at least 3X of NewSize to begin with; | |
1144 // later NewRatio will decide how it grows; see above. | |
1145 if (FLAG_IS_DEFAULT(OldSize)) { | |
1146 if (max_heap > NewSize) { | |
1064 | 1147 FLAG_SET_ERGO(uintx, OldSize, MIN2(3*NewSize, max_heap - NewSize)); |
1148 if (PrintGCDetails && Verbose) { | |
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1149 // Too early to use gclog_or_tty |
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1150 tty->print_cr("Ergo set OldSize: " SIZE_FORMAT, OldSize); |
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1151 } |
0 | 1152 } |
1153 } | |
1154 } | |
1155 } | |
1156 // Unless explicitly requested otherwise, definitely | |
1157 // promote all objects surviving "tenuring_default" scavenges. | |
1158 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) && | |
1159 FLAG_IS_DEFAULT(SurvivorRatio)) { | |
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1160 FLAG_SET_ERGO(intx, MaxTenuringThreshold, tenuring_default); |
0 | 1161 } |
1162 // If we decided above (or user explicitly requested) | |
1163 // `promote all' (via MaxTenuringThreshold := 0), | |
1164 // prefer minuscule survivor spaces so as not to waste | |
1165 // space for (non-existent) survivors | |
1166 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) { | |
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1167 FLAG_SET_ERGO(intx, SurvivorRatio, MAX2((intx)1024, SurvivorRatio)); |
0 | 1168 } |
1169 // If OldPLABSize is set and CMSParPromoteBlocksToClaim is not, | |
1170 // set CMSParPromoteBlocksToClaim equal to OldPLABSize. | |
1171 // This is done in order to make ParNew+CMS configuration to work | |
1172 // with YoungPLABSize and OldPLABSize options. | |
1173 // See CR 6362902. | |
1174 if (!FLAG_IS_DEFAULT(OldPLABSize)) { | |
1175 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) { | |
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1176 // OldPLABSize is not the default value but CMSParPromoteBlocksToClaim |
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1177 // is. In this situtation let CMSParPromoteBlocksToClaim follow |
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1178 // the value (either from the command line or ergonomics) of |
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1179 // OldPLABSize. Following OldPLABSize is an ergonomics decision. |
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1180 FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, OldPLABSize); |
1145
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1181 } else { |
0 | 1182 // OldPLABSize and CMSParPromoteBlocksToClaim are both set. |
1183 // CMSParPromoteBlocksToClaim is a collector-specific flag, so | |
1184 // we'll let it to take precedence. | |
1185 jio_fprintf(defaultStream::error_stream(), | |
886
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1186 "Both OldPLABSize and CMSParPromoteBlocksToClaim" |
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1187 " options are specified for the CMS collector." |
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1188 " CMSParPromoteBlocksToClaim will take precedence.\n"); |
0 | 1189 } |
1190 } | |
1145
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1191 if (!FLAG_IS_DEFAULT(ResizeOldPLAB) && !ResizeOldPLAB) { |
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1192 // OldPLAB sizing manually turned off: Use a larger default setting, |
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1193 // unless it was manually specified. This is because a too-low value |
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1194 // will slow down scavenges. |
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1195 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) { |
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1196 FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, 50); // default value before 6631166 |
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1197 } |
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1198 } |
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1199 // Overwrite OldPLABSize which is the variable we will internally use everywhere. |
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1200 FLAG_SET_ERGO(uintx, OldPLABSize, CMSParPromoteBlocksToClaim); |
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1201 // If either of the static initialization defaults have changed, note this |
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1202 // modification. |
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1203 if (!FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim) || !FLAG_IS_DEFAULT(OldPLABWeight)) { |
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1204 CFLS_LAB::modify_initialization(OldPLABSize, OldPLABWeight); |
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1205 } |
0 | 1206 } |
1145
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1207 #endif // KERNEL |
0 | 1208 |
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1209 inline uintx max_heap_for_compressed_oops() { |
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1210 LP64_ONLY(return oopDesc::OopEncodingHeapMax - MaxPermSize - os::vm_page_size()); |
1064 | 1211 NOT_LP64(ShouldNotReachHere(); return 0); |
135
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1212 } |
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1213 |
0 | 1214 bool Arguments::should_auto_select_low_pause_collector() { |
1215 if (UseAutoGCSelectPolicy && | |
1216 !FLAG_IS_DEFAULT(MaxGCPauseMillis) && | |
1217 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) { | |
1218 if (PrintGCDetails) { | |
1219 // Cannot use gclog_or_tty yet. | |
1220 tty->print_cr("Automatic selection of the low pause collector" | |
1221 " based on pause goal of %d (ms)", MaxGCPauseMillis); | |
1222 } | |
1223 return true; | |
1224 } | |
1225 return false; | |
1226 } | |
1227 | |
1228 void Arguments::set_ergonomics_flags() { | |
1229 // Parallel GC is not compatible with sharing. If one specifies | |
1064 | 1230 // that they want sharing explicitly, do not set ergonomics flags. |
0 | 1231 if (DumpSharedSpaces || ForceSharedSpaces) { |
1232 return; | |
1233 } | |
1234 | |
1235 if (os::is_server_class_machine() && !force_client_mode ) { | |
1236 // If no other collector is requested explicitly, | |
1237 // let the VM select the collector based on | |
1238 // machine class and automatic selection policy. | |
1239 if (!UseSerialGC && | |
1240 !UseConcMarkSweepGC && | |
342
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1241 !UseG1GC && |
0 | 1242 !UseParNewGC && |
1243 !DumpSharedSpaces && | |
1244 FLAG_IS_DEFAULT(UseParallelGC)) { | |
1245 if (should_auto_select_low_pause_collector()) { | |
1246 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true); | |
1247 } else { | |
1248 FLAG_SET_ERGO(bool, UseParallelGC, true); | |
1249 } | |
1250 no_shared_spaces(); | |
1251 } | |
1252 } | |
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1253 |
1010 | 1254 #ifndef ZERO |
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1255 #ifdef _LP64 |
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1256 // Check that UseCompressedOops can be set with the max heap size allocated |
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1257 // by ergonomics. |
187 | 1258 if (MaxHeapSize <= max_heap_for_compressed_oops()) { |
1060 | 1259 #ifndef COMPILER1 |
932 | 1260 if (FLAG_IS_DEFAULT(UseCompressedOops) && !UseG1GC) { |
1261 FLAG_SET_ERGO(bool, UseCompressedOops, true); | |
113
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1262 } |
1060 | 1263 #endif |
325
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1264 #ifdef _WIN64 |
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1265 if (UseLargePages && UseCompressedOops) { |
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1266 // Cannot allocate guard pages for implicit checks in indexed addressing |
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1267 // mode, when large pages are specified on windows. |
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1268 // This flag could be switched ON if narrow oop base address is set to 0, |
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1269 // see code in Universe::initialize_heap(). |
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1270 Universe::set_narrow_oop_use_implicit_null_checks(false); |
325
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1271 } |
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1272 #endif // _WIN64 |
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1273 } else { |
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1274 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) { |
344 | 1275 warning("Max heap size too large for Compressed Oops"); |
113
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1276 FLAG_SET_DEFAULT(UseCompressedOops, false); |
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1277 } |
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1278 } |
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1279 // Also checks that certain machines are slower with compressed oops |
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1280 // in vm_version initialization code. |
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1281 #endif // _LP64 |
1010 | 1282 #endif // !ZERO |
0 | 1283 } |
1284 | |
1285 void Arguments::set_parallel_gc_flags() { | |
342
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1286 assert(UseParallelGC || UseParallelOldGC, "Error"); |
0 | 1287 // If parallel old was requested, automatically enable parallel scavenge. |
1288 if (UseParallelOldGC && !UseParallelGC && FLAG_IS_DEFAULT(UseParallelGC)) { | |
1289 FLAG_SET_DEFAULT(UseParallelGC, true); | |
1290 } | |
1291 | |
1292 // If no heap maximum was requested explicitly, use some reasonable fraction | |
1293 // of the physical memory, up to a maximum of 1GB. | |
1294 if (UseParallelGC) { | |
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1295 FLAG_SET_ERGO(uintx, ParallelGCThreads, |
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1296 Abstract_VM_Version::parallel_worker_threads()); |
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1297 |
0 | 1298 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the |
1299 // SurvivorRatio has been set, reset their default values to SurvivorRatio + | |
1300 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger. | |
1301 // See CR 6362902 for details. | |
1302 if (!FLAG_IS_DEFAULT(SurvivorRatio)) { | |
1303 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) { | |
1304 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2); | |
1305 } | |
1306 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) { | |
1307 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2); | |
1308 } | |
1309 } | |
1310 | |
1311 if (UseParallelOldGC) { | |
1312 // Par compact uses lower default values since they are treated as | |
13
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1313 // minimums. These are different defaults because of the different |
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1314 // interpretation and are not ergonomically set. |
0 | 1315 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) { |
13
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1316 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1); |
0 | 1317 } |
1318 if (FLAG_IS_DEFAULT(PermMarkSweepDeadRatio)) { | |
13
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1319 FLAG_SET_DEFAULT(PermMarkSweepDeadRatio, 5); |
0 | 1320 } |
1321 } | |
1322 } | |
1323 } | |
1324 | |
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1325 void Arguments::set_g1_gc_flags() { |
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1326 assert(UseG1GC, "Error"); |
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1327 #ifdef COMPILER1 |
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1328 FastTLABRefill = false; |
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1329 #endif |
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1330 FLAG_SET_DEFAULT(ParallelGCThreads, |
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1331 Abstract_VM_Version::parallel_worker_threads()); |
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1332 if (ParallelGCThreads == 0) { |
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1333 FLAG_SET_DEFAULT(ParallelGCThreads, |
751 | 1334 Abstract_VM_Version::parallel_worker_threads()); |
342
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1335 } |
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1336 no_shared_spaces(); |
751 | 1337 |
1338 // Set the maximum pause time goal to be a reasonable default. | |
1339 if (FLAG_IS_DEFAULT(MaxGCPauseMillis)) { | |
1340 FLAG_SET_DEFAULT(MaxGCPauseMillis, 200); | |
1341 } | |
342
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1342 } |
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1343 |
1064 | 1344 void Arguments::set_heap_size() { |
1345 if (!FLAG_IS_DEFAULT(DefaultMaxRAMFraction)) { | |
1346 // Deprecated flag | |
1347 FLAG_SET_CMDLINE(uintx, MaxRAMFraction, DefaultMaxRAMFraction); | |
1348 } | |
1349 | |
1350 const julong phys_mem = | |
1351 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM) | |
1352 : (julong)MaxRAM; | |
1353 | |
1354 // If the maximum heap size has not been set with -Xmx, | |
1355 // then set it as fraction of the size of physical memory, | |
1356 // respecting the maximum and minimum sizes of the heap. | |
342
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1357 if (FLAG_IS_DEFAULT(MaxHeapSize)) { |
1064 | 1358 julong reasonable_max = phys_mem / MaxRAMFraction; |
1359 | |
1360 if (phys_mem <= MaxHeapSize * MinRAMFraction) { | |
1361 // Small physical memory, so use a minimum fraction of it for the heap | |
1362 reasonable_max = phys_mem / MinRAMFraction; | |
1363 } else { | |
1364 // Not-small physical memory, so require a heap at least | |
1365 // as large as MaxHeapSize | |
1366 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize); | |
1367 } | |
1368 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) { | |
1369 // Limit the heap size to ErgoHeapSizeLimit | |
1370 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit); | |
342
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1371 } |
1064 | 1372 if (UseCompressedOops) { |
1373 // Limit the heap size to the maximum possible when using compressed oops | |
1374 reasonable_max = MIN2(reasonable_max, (julong)max_heap_for_compressed_oops()); | |
1375 } | |
1376 reasonable_max = os::allocatable_physical_memory(reasonable_max); | |
1377 | |
1378 if (!FLAG_IS_DEFAULT(InitialHeapSize)) { | |
1379 // An initial heap size was specified on the command line, | |
1380 // so be sure that the maximum size is consistent. Done | |
1381 // after call to allocatable_physical_memory because that | |
1382 // method might reduce the allocation size. | |
1383 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize); | |
1384 } | |
1385 | |
342
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1386 if (PrintGCDetails && Verbose) { |
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1387 // Cannot use gclog_or_tty yet. |
1064 | 1388 tty->print_cr(" Maximum heap size " SIZE_FORMAT, reasonable_max); |
342
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1389 } |
1064 | 1390 FLAG_SET_ERGO(uintx, MaxHeapSize, (uintx)reasonable_max); |
1391 } | |
1392 | |
1393 // If the initial_heap_size has not been set with InitialHeapSize | |
1394 // or -Xms, then set it as fraction of the size of physical memory, | |
1395 // respecting the maximum and minimum sizes of the heap. | |
1396 if (FLAG_IS_DEFAULT(InitialHeapSize)) { | |
1074
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1397 julong reasonable_minimum = (julong)(OldSize + NewSize); |
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1398 |
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1399 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize); |
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1400 |
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1401 reasonable_minimum = os::allocatable_physical_memory(reasonable_minimum); |
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1402 |
1064 | 1403 julong reasonable_initial = phys_mem / InitialRAMFraction; |
1404 | |
1074
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1405 reasonable_initial = MAX2(reasonable_initial, reasonable_minimum); |
1064 | 1406 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize); |
1407 | |
1408 reasonable_initial = os::allocatable_physical_memory(reasonable_initial); | |
1409 | |
1410 if (PrintGCDetails && Verbose) { | |
1411 // Cannot use gclog_or_tty yet. | |
1412 tty->print_cr(" Initial heap size " SIZE_FORMAT, (uintx)reasonable_initial); | |
1074
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1413 tty->print_cr(" Minimum heap size " SIZE_FORMAT, (uintx)reasonable_minimum); |
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1414 } |
1064 | 1415 FLAG_SET_ERGO(uintx, InitialHeapSize, (uintx)reasonable_initial); |
1074
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1416 set_min_heap_size((uintx)reasonable_minimum); |
342
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1417 } |
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1418 } |
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1419 |
0 | 1420 // This must be called after ergonomics because we want bytecode rewriting |
1421 // if the server compiler is used, or if UseSharedSpaces is disabled. | |
1422 void Arguments::set_bytecode_flags() { | |
1423 // Better not attempt to store into a read-only space. | |
1424 if (UseSharedSpaces) { | |
1425 FLAG_SET_DEFAULT(RewriteBytecodes, false); | |
1426 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); | |
1427 } | |
1428 | |
1429 if (!RewriteBytecodes) { | |
1430 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); | |
1431 } | |
1432 } | |
1433 | |
1434 // Aggressive optimization flags -XX:+AggressiveOpts | |
1435 void Arguments::set_aggressive_opts_flags() { | |
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1436 #ifdef COMPILER2 |
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1437 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) { |
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1438 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { |
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1439 FLAG_SET_DEFAULT(EliminateAutoBox, true); |
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1440 } |
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1441 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) { |
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1442 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000); |
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1443 } |
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1444 |
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|
1445 // Feed the cache size setting into the JDK |
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|
1446 char buffer[1024]; |
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|
1447 sprintf(buffer, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax); |
17
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|
1448 add_property(buffer); |
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|
1449 } |
65 | 1450 if (AggressiveOpts && FLAG_IS_DEFAULT(DoEscapeAnalysis)) { |
1451 FLAG_SET_DEFAULT(DoEscapeAnalysis, true); | |
1452 } | |
416
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1453 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) { |
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1454 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500); |
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|
1455 } |
17
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1456 #endif |
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|
1457 |
0 | 1458 if (AggressiveOpts) { |
61 | 1459 // Sample flag setting code |
1460 // if (FLAG_IS_DEFAULT(EliminateZeroing)) { | |
1461 // FLAG_SET_DEFAULT(EliminateZeroing, true); | |
1462 // } | |
0 | 1463 } |
1464 } | |
1465 | |
1466 //=========================================================================================================== | |
1467 // Parsing of java.compiler property | |
1468 | |
1469 void Arguments::process_java_compiler_argument(char* arg) { | |
1470 // For backwards compatibility, Djava.compiler=NONE or "" | |
1471 // causes us to switch to -Xint mode UNLESS -Xdebug | |
1472 // is also specified. | |
1473 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) { | |
1474 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen. | |
1475 } | |
1476 } | |
1477 | |
1478 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) { | |
1479 _sun_java_launcher = strdup(launcher); | |
1480 } | |
1481 | |
1482 bool Arguments::created_by_java_launcher() { | |
1483 assert(_sun_java_launcher != NULL, "property must have value"); | |
1484 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0; | |
1485 } | |
1486 | |
1487 //=========================================================================================================== | |
1488 // Parsing of main arguments | |
1489 | |
1490 bool Arguments::verify_percentage(uintx value, const char* name) { | |
1491 if (value <= 100) { | |
1492 return true; | |
1493 } | |
1494 jio_fprintf(defaultStream::error_stream(), | |
1495 "%s of " UINTX_FORMAT " is invalid; must be between 0 and 100\n", | |
1496 name, value); | |
1497 return false; | |
1498 } | |
1499 | |
1064 | 1500 static void force_serial_gc() { |
0 | 1501 FLAG_SET_DEFAULT(UseSerialGC, true); |
1502 FLAG_SET_DEFAULT(UseParNewGC, false); | |
1503 FLAG_SET_DEFAULT(UseConcMarkSweepGC, false); | |
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1504 FLAG_SET_DEFAULT(CMSIncrementalMode, false); // special CMS suboption |
0 | 1505 FLAG_SET_DEFAULT(UseParallelGC, false); |
1506 FLAG_SET_DEFAULT(UseParallelOldGC, false); | |
342
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1507 FLAG_SET_DEFAULT(UseG1GC, false); |
0 | 1508 } |
1509 | |
1510 static bool verify_serial_gc_flags() { | |
1511 return (UseSerialGC && | |
945
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1512 !(UseParNewGC || (UseConcMarkSweepGC || CMSIncrementalMode) || UseG1GC || |
342
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1513 UseParallelGC || UseParallelOldGC)); |
0 | 1514 } |
1515 | |
10
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|
1516 // Check consistency of GC selection |
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|
1517 bool Arguments::check_gc_consistency() { |
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|
1518 bool status = true; |
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|
1519 // Ensure that the user has not selected conflicting sets |
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|
1520 // of collectors. [Note: this check is merely a user convenience; |
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1521 // collectors over-ride each other so that only a non-conflicting |
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1522 // set is selected; however what the user gets is not what they |
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1523 // may have expected from the combination they asked for. It's |
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|
1524 // better to reduce user confusion by not allowing them to |
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|
1525 // select conflicting combinations. |
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|
1526 uint i = 0; |
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|
1527 if (UseSerialGC) i++; |
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|
1528 if (UseConcMarkSweepGC || UseParNewGC) i++; |
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|
1529 if (UseParallelGC || UseParallelOldGC) i++; |
845
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6700789: G1: Enable use of compressed oops with G1 heaps
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|
1530 if (UseG1GC) i++; |
10
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1531 if (i > 1) { |
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|
1532 jio_fprintf(defaultStream::error_stream(), |
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|
1533 "Conflicting collector combinations in option list; " |
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|
1534 "please refer to the release notes for the combinations " |
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|
1535 "allowed\n"); |
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|
1536 status = false; |
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|
1537 } |
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|
1538 |
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|
1539 return status; |
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|
1540 } |
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|
1541 |
0 | 1542 // Check the consistency of vm_init_args |
1543 bool Arguments::check_vm_args_consistency() { | |
1544 // Method for adding checks for flag consistency. | |
1545 // The intent is to warn the user of all possible conflicts, | |
1546 // before returning an error. | |
1547 // Note: Needs platform-dependent factoring. | |
1548 bool status = true; | |
1549 | |
1550 #if ( (defined(COMPILER2) && defined(SPARC))) | |
1551 // NOTE: The call to VM_Version_init depends on the fact that VM_Version_init | |
1552 // on sparc doesn't require generation of a stub as is the case on, e.g., | |
1553 // x86. Normally, VM_Version_init must be called from init_globals in | |
1554 // init.cpp, which is called by the initial java thread *after* arguments | |
1555 // have been parsed. VM_Version_init gets called twice on sparc. | |
1556 extern void VM_Version_init(); | |
1557 VM_Version_init(); | |
1558 if (!VM_Version::has_v9()) { | |
1559 jio_fprintf(defaultStream::error_stream(), | |
1560 "V8 Machine detected, Server requires V9\n"); | |
1561 status = false; | |
1562 } | |
1563 #endif /* COMPILER2 && SPARC */ | |
1564 | |
1565 // Allow both -XX:-UseStackBanging and -XX:-UseBoundThreads in non-product | |
1566 // builds so the cost of stack banging can be measured. | |
1567 #if (defined(PRODUCT) && defined(SOLARIS)) | |
1568 if (!UseBoundThreads && !UseStackBanging) { | |
1569 jio_fprintf(defaultStream::error_stream(), | |
1570 "-UseStackBanging conflicts with -UseBoundThreads\n"); | |
1571 | |
1572 status = false; | |
1573 } | |
1574 #endif | |
1575 | |
1576 if (TLABRefillWasteFraction == 0) { | |
1577 jio_fprintf(defaultStream::error_stream(), | |
1578 "TLABRefillWasteFraction should be a denominator, " | |
1579 "not " SIZE_FORMAT "\n", | |
1580 TLABRefillWasteFraction); | |
1581 status = false; | |
1582 } | |
1583 | |
10
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1584 status = status && verify_percentage(MaxLiveObjectEvacuationRatio, |
0 | 1585 "MaxLiveObjectEvacuationRatio"); |
10
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|
1586 status = status && verify_percentage(AdaptiveSizePolicyWeight, |
0 | 1587 "AdaptiveSizePolicyWeight"); |
10
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|
1588 status = status && verify_percentage(AdaptivePermSizeWeight, "AdaptivePermSizeWeight"); |
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|
1589 status = status && verify_percentage(ThresholdTolerance, "ThresholdTolerance"); |
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1590 status = status && verify_percentage(MinHeapFreeRatio, "MinHeapFreeRatio"); |
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|
1591 status = status && verify_percentage(MaxHeapFreeRatio, "MaxHeapFreeRatio"); |
0 | 1592 |
1593 if (MinHeapFreeRatio > MaxHeapFreeRatio) { | |
1594 jio_fprintf(defaultStream::error_stream(), | |
1595 "MinHeapFreeRatio (" UINTX_FORMAT ") must be less than or " | |
1596 "equal to MaxHeapFreeRatio (" UINTX_FORMAT ")\n", | |
1597 MinHeapFreeRatio, MaxHeapFreeRatio); | |
1598 status = false; | |
1599 } | |
1600 // Keeping the heap 100% free is hard ;-) so limit it to 99%. | |
1601 MinHeapFreeRatio = MIN2(MinHeapFreeRatio, (uintx) 99); | |
1602 | |
1603 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) { | |
1604 MarkSweepAlwaysCompactCount = 1; // Move objects every gc. | |
1605 } | |
1606 | |
483
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|
1607 if (UseParallelOldGC && ParallelOldGCSplitALot) { |
0f773163217d
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diff
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|
1608 // Settings to encourage splitting. |
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diff
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|
1609 if (!FLAG_IS_CMDLINE(NewRatio)) { |
0f773163217d
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diff
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|
1610 FLAG_SET_CMDLINE(intx, NewRatio, 2); |
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diff
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|
1611 } |
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|
1612 if (!FLAG_IS_CMDLINE(ScavengeBeforeFullGC)) { |
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diff
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|
1613 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); |
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diff
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|
1614 } |
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|
1615 } |
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|
1616 |
10
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1617 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); |
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1618 status = status && verify_percentage(GCTimeLimit, "GCTimeLimit"); |
0 | 1619 if (GCTimeLimit == 100) { |
1620 // Turn off gc-overhead-limit-exceeded checks | |
1621 FLAG_SET_DEFAULT(UseGCOverheadLimit, false); | |
1622 } | |
1623 | |
10
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1624 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); |
0 | 1625 |
1626 // Check user specified sharing option conflict with Parallel GC | |
945
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1627 bool cannot_share = ((UseConcMarkSweepGC || CMSIncrementalMode) || UseG1GC || UseParNewGC || |
342
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1628 UseParallelGC || UseParallelOldGC || |
0 | 1629 SOLARIS_ONLY(UseISM) NOT_SOLARIS(UseLargePages)); |
1630 | |
1631 if (cannot_share) { | |
1632 // Either force sharing on by forcing the other options off, or | |
1633 // force sharing off. | |
1634 if (DumpSharedSpaces || ForceSharedSpaces) { | |
945
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|
1635 jio_fprintf(defaultStream::error_stream(), |
1064 | 1636 "Reverting to Serial GC because of %s\n", |
945
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|
1637 ForceSharedSpaces ? " -Xshare:on" : "-Xshare:dump"); |
1064 | 1638 force_serial_gc(); |
0 | 1639 FLAG_SET_DEFAULT(SOLARIS_ONLY(UseISM) NOT_SOLARIS(UseLargePages), false); |
1640 } else { | |
1064 | 1641 if (UseSharedSpaces && Verbose) { |
945
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|
1642 jio_fprintf(defaultStream::error_stream(), |
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1643 "Turning off use of shared archive because of " |
1064 | 1644 "choice of garbage collector or large pages\n"); |
945
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|
1645 } |
0 | 1646 no_shared_spaces(); |
1647 } | |
1648 } | |
1649 | |
10
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|
1650 status = status && check_gc_consistency(); |
0 | 1651 |
1652 if (_has_alloc_profile) { | |
1653 if (UseParallelGC || UseParallelOldGC) { | |
1654 jio_fprintf(defaultStream::error_stream(), | |
1655 "error: invalid argument combination.\n" | |
1656 "Allocation profiling (-Xaprof) cannot be used together with " | |
1657 "Parallel GC (-XX:+UseParallelGC or -XX:+UseParallelOldGC).\n"); | |
1658 status = false; | |
1659 } | |
1660 if (UseConcMarkSweepGC) { | |
1661 jio_fprintf(defaultStream::error_stream(), | |
1662 "error: invalid argument combination.\n" | |
1663 "Allocation profiling (-Xaprof) cannot be used together with " | |
1664 "the CMS collector (-XX:+UseConcMarkSweepGC).\n"); | |
1665 status = false; | |
1666 } | |
1667 } | |
1668 | |
1669 if (CMSIncrementalMode) { | |
1670 if (!UseConcMarkSweepGC) { | |
1671 jio_fprintf(defaultStream::error_stream(), | |
1672 "error: invalid argument combination.\n" | |
1673 "The CMS collector (-XX:+UseConcMarkSweepGC) must be " | |
1674 "selected in order\nto use CMSIncrementalMode.\n"); | |
1675 status = false; | |
1676 } else { | |
10
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|
1677 status = status && verify_percentage(CMSIncrementalDutyCycle, |
0 | 1678 "CMSIncrementalDutyCycle"); |
10
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|
1679 status = status && verify_percentage(CMSIncrementalDutyCycleMin, |
0 | 1680 "CMSIncrementalDutyCycleMin"); |
10
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|
1681 status = status && verify_percentage(CMSIncrementalSafetyFactor, |
0 | 1682 "CMSIncrementalSafetyFactor"); |
10
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|
1683 status = status && verify_percentage(CMSIncrementalOffset, |
0 | 1684 "CMSIncrementalOffset"); |
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|
1685 status = status && verify_percentage(CMSExpAvgFactor, |
0 | 1686 "CMSExpAvgFactor"); |
1687 // If it was not set on the command line, set | |
1688 // CMSInitiatingOccupancyFraction to 1 so icms can initiate cycles early. | |
1689 if (CMSInitiatingOccupancyFraction < 0) { | |
1690 FLAG_SET_DEFAULT(CMSInitiatingOccupancyFraction, 1); | |
1691 } | |
1692 } | |
1693 } | |
1694 | |
1695 // CMS space iteration, which FLSVerifyAllHeapreferences entails, | |
1696 // insists that we hold the requisite locks so that the iteration is | |
1697 // MT-safe. For the verification at start-up and shut-down, we don't | |
1698 // yet have a good way of acquiring and releasing these locks, | |
1699 // which are not visible at the CollectedHeap level. We want to | |
1700 // be able to acquire these locks and then do the iteration rather | |
1701 // than just disable the lock verification. This will be fixed under | |
1702 // bug 4788986. | |
1703 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) { | |
1704 if (VerifyGCStartAt == 0) { | |
1705 warning("Heap verification at start-up disabled " | |
1706 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); | |
1707 VerifyGCStartAt = 1; // Disable verification at start-up | |
1708 } | |
1709 if (VerifyBeforeExit) { | |
1710 warning("Heap verification at shutdown disabled " | |
1711 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); | |
1712 VerifyBeforeExit = false; // Disable verification at shutdown | |
1713 } | |
1714 } | |
1715 | |
1716 // Note: only executed in non-PRODUCT mode | |
1717 if (!UseAsyncConcMarkSweepGC && | |
1718 (ExplicitGCInvokesConcurrent || | |
1719 ExplicitGCInvokesConcurrentAndUnloadsClasses)) { | |
1720 jio_fprintf(defaultStream::error_stream(), | |
1721 "error: +ExplictGCInvokesConcurrent[AndUnloadsClasses] conflicts" | |
1722 " with -UseAsyncConcMarkSweepGC"); | |
1723 status = false; | |
1724 } | |
1725 | |
1726 return status; | |
1727 } | |
1728 | |
1729 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore, | |
1730 const char* option_type) { | |
1731 if (ignore) return false; | |
1732 | |
1733 const char* spacer = " "; | |
1734 if (option_type == NULL) { | |
1735 option_type = ++spacer; // Set both to the empty string. | |
1736 } | |
1737 | |
1738 if (os::obsolete_option(option)) { | |
1739 jio_fprintf(defaultStream::error_stream(), | |
1740 "Obsolete %s%soption: %s\n", option_type, spacer, | |
1741 option->optionString); | |
1742 return false; | |
1743 } else { | |
1744 jio_fprintf(defaultStream::error_stream(), | |
1745 "Unrecognized %s%soption: %s\n", option_type, spacer, | |
1746 option->optionString); | |
1747 return true; | |
1748 } | |
1749 } | |
1750 | |
1751 static const char* user_assertion_options[] = { | |
1752 "-da", "-ea", "-disableassertions", "-enableassertions", 0 | |
1753 }; | |
1754 | |
1755 static const char* system_assertion_options[] = { | |
1756 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0 | |
1757 }; | |
1758 | |
1759 // Return true if any of the strings in null-terminated array 'names' matches. | |
1760 // If tail_allowed is true, then the tail must begin with a colon; otherwise, | |
1761 // the option must match exactly. | |
1762 static bool match_option(const JavaVMOption* option, const char** names, const char** tail, | |
1763 bool tail_allowed) { | |
1764 for (/* empty */; *names != NULL; ++names) { | |
1765 if (match_option(option, *names, tail)) { | |
1766 if (**tail == '\0' || tail_allowed && **tail == ':') { | |
1767 return true; | |
1768 } | |
1769 } | |
1770 } | |
1771 return false; | |
1772 } | |
1773 | |
1774 Arguments::ArgsRange Arguments::parse_memory_size(const char* s, | |
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1775 julong* long_arg, |
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1776 julong min_size) { |
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1777 if (!atomull(s, long_arg)) return arg_unreadable; |
0 | 1778 return check_memory_size(*long_arg, min_size); |
1779 } | |
1780 | |
1781 // Parse JavaVMInitArgs structure | |
1782 | |
1783 jint Arguments::parse_vm_init_args(const JavaVMInitArgs* args) { | |
1784 // For components of the system classpath. | |
1785 SysClassPath scp(Arguments::get_sysclasspath()); | |
1786 bool scp_assembly_required = false; | |
1787 | |
1788 // Save default settings for some mode flags | |
1789 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; | |
1790 Arguments::_UseOnStackReplacement = UseOnStackReplacement; | |
1791 Arguments::_ClipInlining = ClipInlining; | |
1792 Arguments::_BackgroundCompilation = BackgroundCompilation; | |
1793 Arguments::_Tier2CompileThreshold = Tier2CompileThreshold; | |
1794 | |
1795 // Parse JAVA_TOOL_OPTIONS environment variable (if present) | |
1796 jint result = parse_java_tool_options_environment_variable(&scp, &scp_assembly_required); | |
1797 if (result != JNI_OK) { | |
1798 return result; | |
1799 } | |
1800 | |
1801 // Parse JavaVMInitArgs structure passed in | |
1802 result = parse_each_vm_init_arg(args, &scp, &scp_assembly_required, COMMAND_LINE); | |
1803 if (result != JNI_OK) { | |
1804 return result; | |
1805 } | |
1806 | |
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1807 if (AggressiveOpts) { |
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1808 // Insert alt-rt.jar between user-specified bootclasspath |
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1809 // prefix and the default bootclasspath. os::set_boot_path() |
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1810 // uses meta_index_dir as the default bootclasspath directory. |
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1811 const char* altclasses_jar = "alt-rt.jar"; |
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1812 size_t altclasses_path_len = strlen(get_meta_index_dir()) + 1 + |
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1813 strlen(altclasses_jar); |
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1814 char* altclasses_path = NEW_C_HEAP_ARRAY(char, altclasses_path_len); |
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1815 strcpy(altclasses_path, get_meta_index_dir()); |
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1816 strcat(altclasses_path, altclasses_jar); |
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1817 scp.add_suffix_to_prefix(altclasses_path); |
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1818 scp_assembly_required = true; |
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1819 FREE_C_HEAP_ARRAY(char, altclasses_path); |
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1820 } |
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1821 |
0 | 1822 // Parse _JAVA_OPTIONS environment variable (if present) (mimics classic VM) |
1823 result = parse_java_options_environment_variable(&scp, &scp_assembly_required); | |
1824 if (result != JNI_OK) { | |
1825 return result; | |
1826 } | |
1827 | |
1828 // Do final processing now that all arguments have been parsed | |
1829 result = finalize_vm_init_args(&scp, scp_assembly_required); | |
1830 if (result != JNI_OK) { | |
1831 return result; | |
1832 } | |
1833 | |
1834 return JNI_OK; | |
1835 } | |
1836 | |
1837 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, | |
1838 SysClassPath* scp_p, | |
1839 bool* scp_assembly_required_p, | |
1840 FlagValueOrigin origin) { | |
1841 // Remaining part of option string | |
1842 const char* tail; | |
1843 | |
1844 // iterate over arguments | |
1845 for (int index = 0; index < args->nOptions; index++) { | |
1846 bool is_absolute_path = false; // for -agentpath vs -agentlib | |
1847 | |
1848 const JavaVMOption* option = args->options + index; | |
1849 | |
1850 if (!match_option(option, "-Djava.class.path", &tail) && | |
1851 !match_option(option, "-Dsun.java.command", &tail) && | |
1852 !match_option(option, "-Dsun.java.launcher", &tail)) { | |
1853 | |
1854 // add all jvm options to the jvm_args string. This string | |
1855 // is used later to set the java.vm.args PerfData string constant. | |
1856 // the -Djava.class.path and the -Dsun.java.command options are | |
1857 // omitted from jvm_args string as each have their own PerfData | |
1858 // string constant object. | |
1859 build_jvm_args(option->optionString); | |
1860 } | |
1861 | |
1862 // -verbose:[class/gc/jni] | |
1863 if (match_option(option, "-verbose", &tail)) { | |
1864 if (!strcmp(tail, ":class") || !strcmp(tail, "")) { | |
1865 FLAG_SET_CMDLINE(bool, TraceClassLoading, true); | |
1866 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); | |
1867 } else if (!strcmp(tail, ":gc")) { | |
1868 FLAG_SET_CMDLINE(bool, PrintGC, true); | |
1869 } else if (!strcmp(tail, ":jni")) { | |
1870 FLAG_SET_CMDLINE(bool, PrintJNIResolving, true); | |
1871 } | |
1872 // -da / -ea / -disableassertions / -enableassertions | |
1873 // These accept an optional class/package name separated by a colon, e.g., | |
1874 // -da:java.lang.Thread. | |
1875 } else if (match_option(option, user_assertion_options, &tail, true)) { | |
1876 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' | |
1877 if (*tail == '\0') { | |
1878 JavaAssertions::setUserClassDefault(enable); | |
1879 } else { | |
1880 assert(*tail == ':', "bogus match by match_option()"); | |
1881 JavaAssertions::addOption(tail + 1, enable); | |
1882 } | |
1883 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions | |
1884 } else if (match_option(option, system_assertion_options, &tail, false)) { | |
1885 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' | |
1886 JavaAssertions::setSystemClassDefault(enable); | |
1887 // -bootclasspath: | |
1888 } else if (match_option(option, "-Xbootclasspath:", &tail)) { | |
1889 scp_p->reset_path(tail); | |
1890 *scp_assembly_required_p = true; | |
1891 // -bootclasspath/a: | |
1892 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) { | |
1893 scp_p->add_suffix(tail); | |
1894 *scp_assembly_required_p = true; | |
1895 // -bootclasspath/p: | |
1896 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) { | |
1897 scp_p->add_prefix(tail); | |
1898 *scp_assembly_required_p = true; | |
1899 // -Xrun | |
1900 } else if (match_option(option, "-Xrun", &tail)) { | |
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1901 if (tail != NULL) { |
0 | 1902 const char* pos = strchr(tail, ':'); |
1903 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; | |
1904 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); | |
1905 name[len] = '\0'; | |
1906 | |
1907 char *options = NULL; | |
1908 if(pos != NULL) { | |
1909 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied. | |
1910 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2), pos+1, len2); | |
1911 } | |
1912 #ifdef JVMTI_KERNEL | |
1913 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { | |
1914 warning("profiling and debugging agents are not supported with Kernel VM"); | |
1915 } else | |
1916 #endif // JVMTI_KERNEL | |
1917 add_init_library(name, options); | |
1918 } | |
1919 // -agentlib and -agentpath | |
1920 } else if (match_option(option, "-agentlib:", &tail) || | |
1921 (is_absolute_path = match_option(option, "-agentpath:", &tail))) { | |
1922 if(tail != NULL) { | |
1923 const char* pos = strchr(tail, '='); | |
1924 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; | |
1925 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); | |
1926 name[len] = '\0'; | |
1927 | |
1928 char *options = NULL; | |
1929 if(pos != NULL) { | |
1930 options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(pos + 1) + 1), pos + 1); | |
1931 } | |
1932 #ifdef JVMTI_KERNEL | |
1933 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { | |
1934 warning("profiling and debugging agents are not supported with Kernel VM"); | |
1935 } else | |
1936 #endif // JVMTI_KERNEL | |
1937 add_init_agent(name, options, is_absolute_path); | |
1938 | |
1939 } | |
1940 // -javaagent | |
1941 } else if (match_option(option, "-javaagent:", &tail)) { | |
1942 if(tail != NULL) { | |
1943 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1), tail); | |
1944 add_init_agent("instrument", options, false); | |
1945 } | |
1946 // -Xnoclassgc | |
1947 } else if (match_option(option, "-Xnoclassgc", &tail)) { | |
1948 FLAG_SET_CMDLINE(bool, ClassUnloading, false); | |
1949 // -Xincgc: i-CMS | |
1950 } else if (match_option(option, "-Xincgc", &tail)) { | |
1951 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); | |
1952 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, true); | |
1953 // -Xnoincgc: no i-CMS | |
1954 } else if (match_option(option, "-Xnoincgc", &tail)) { | |
1955 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); | |
1956 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, false); | |
1957 // -Xconcgc | |
1958 } else if (match_option(option, "-Xconcgc", &tail)) { | |
1959 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); | |
1960 // -Xnoconcgc | |
1961 } else if (match_option(option, "-Xnoconcgc", &tail)) { | |
1962 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); | |
1963 // -Xbatch | |
1964 } else if (match_option(option, "-Xbatch", &tail)) { | |
1965 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); | |
1966 // -Xmn for compatibility with other JVM vendors | |
1967 } else if (match_option(option, "-Xmn", &tail)) { | |
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1968 julong long_initial_eden_size = 0; |
0 | 1969 ArgsRange errcode = parse_memory_size(tail, &long_initial_eden_size, 1); |
1970 if (errcode != arg_in_range) { | |
1971 jio_fprintf(defaultStream::error_stream(), | |
1972 "Invalid initial eden size: %s\n", option->optionString); | |
1973 describe_range_error(errcode); | |
1974 return JNI_EINVAL; | |
1975 } | |
1064 | 1976 FLAG_SET_CMDLINE(uintx, MaxNewSize, (uintx)long_initial_eden_size); |
1977 FLAG_SET_CMDLINE(uintx, NewSize, (uintx)long_initial_eden_size); | |
0 | 1978 // -Xms |
1979 } else if (match_option(option, "-Xms", &tail)) { | |
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1980 julong long_initial_heap_size = 0; |
0 | 1981 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 1); |
1982 if (errcode != arg_in_range) { | |
1983 jio_fprintf(defaultStream::error_stream(), | |
1984 "Invalid initial heap size: %s\n", option->optionString); | |
1985 describe_range_error(errcode); | |
1986 return JNI_EINVAL; | |
1987 } | |
1064 | 1988 FLAG_SET_CMDLINE(uintx, InitialHeapSize, (uintx)long_initial_heap_size); |
0 | 1989 // Currently the minimum size and the initial heap sizes are the same. |
1064 | 1990 set_min_heap_size(InitialHeapSize); |
0 | 1991 // -Xmx |
1992 } else if (match_option(option, "-Xmx", &tail)) { | |
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1993 julong long_max_heap_size = 0; |
0 | 1994 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1); |
1995 if (errcode != arg_in_range) { | |
1996 jio_fprintf(defaultStream::error_stream(), | |
1997 "Invalid maximum heap size: %s\n", option->optionString); | |
1998 describe_range_error(errcode); | |
1999 return JNI_EINVAL; | |
2000 } | |
1064 | 2001 FLAG_SET_CMDLINE(uintx, MaxHeapSize, (uintx)long_max_heap_size); |
0 | 2002 // Xmaxf |
2003 } else if (match_option(option, "-Xmaxf", &tail)) { | |
2004 int maxf = (int)(atof(tail) * 100); | |
2005 if (maxf < 0 || maxf > 100) { | |
2006 jio_fprintf(defaultStream::error_stream(), | |
2007 "Bad max heap free percentage size: %s\n", | |
2008 option->optionString); | |
2009 return JNI_EINVAL; | |
2010 } else { | |
2011 FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf); | |
2012 } | |
2013 // Xminf | |
2014 } else if (match_option(option, "-Xminf", &tail)) { | |
2015 int minf = (int)(atof(tail) * 100); | |
2016 if (minf < 0 || minf > 100) { | |
2017 jio_fprintf(defaultStream::error_stream(), | |
2018 "Bad min heap free percentage size: %s\n", | |
2019 option->optionString); | |
2020 return JNI_EINVAL; | |
2021 } else { | |
2022 FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf); | |
2023 } | |
2024 // -Xss | |
2025 } else if (match_option(option, "-Xss", &tail)) { | |
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2026 julong long_ThreadStackSize = 0; |
0 | 2027 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000); |
2028 if (errcode != arg_in_range) { | |
2029 jio_fprintf(defaultStream::error_stream(), | |
2030 "Invalid thread stack size: %s\n", option->optionString); | |
2031 describe_range_error(errcode); | |
2032 return JNI_EINVAL; | |
2033 } | |
2034 // Internally track ThreadStackSize in units of 1024 bytes. | |
2035 FLAG_SET_CMDLINE(intx, ThreadStackSize, | |
2036 round_to((int)long_ThreadStackSize, K) / K); | |
2037 // -Xoss | |
2038 } else if (match_option(option, "-Xoss", &tail)) { | |
2039 // HotSpot does not have separate native and Java stacks, ignore silently for compatibility | |
2040 // -Xmaxjitcodesize | |
2041 } else if (match_option(option, "-Xmaxjitcodesize", &tail)) { | |
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2042 julong long_ReservedCodeCacheSize = 0; |
0 | 2043 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, |
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2044 (size_t)InitialCodeCacheSize); |
0 | 2045 if (errcode != arg_in_range) { |
2046 jio_fprintf(defaultStream::error_stream(), | |
2047 "Invalid maximum code cache size: %s\n", | |
2048 option->optionString); | |
2049 describe_range_error(errcode); | |
2050 return JNI_EINVAL; | |
2051 } | |
2052 FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize); | |
2053 // -green | |
2054 } else if (match_option(option, "-green", &tail)) { | |
2055 jio_fprintf(defaultStream::error_stream(), | |
2056 "Green threads support not available\n"); | |
2057 return JNI_EINVAL; | |
2058 // -native | |
2059 } else if (match_option(option, "-native", &tail)) { | |
2060 // HotSpot always uses native threads, ignore silently for compatibility | |
2061 // -Xsqnopause | |
2062 } else if (match_option(option, "-Xsqnopause", &tail)) { | |
2063 // EVM option, ignore silently for compatibility | |
2064 // -Xrs | |
2065 } else if (match_option(option, "-Xrs", &tail)) { | |
2066 // Classic/EVM option, new functionality | |
2067 FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true); | |
2068 } else if (match_option(option, "-Xusealtsigs", &tail)) { | |
2069 // change default internal VM signals used - lower case for back compat | |
2070 FLAG_SET_CMDLINE(bool, UseAltSigs, true); | |
2071 // -Xoptimize | |
2072 } else if (match_option(option, "-Xoptimize", &tail)) { | |
2073 // EVM option, ignore silently for compatibility | |
2074 // -Xprof | |
2075 } else if (match_option(option, "-Xprof", &tail)) { | |
2076 #ifndef FPROF_KERNEL | |
2077 _has_profile = true; | |
2078 #else // FPROF_KERNEL | |
2079 // do we have to exit? | |
2080 warning("Kernel VM does not support flat profiling."); | |
2081 #endif // FPROF_KERNEL | |
2082 // -Xaprof | |
2083 } else if (match_option(option, "-Xaprof", &tail)) { | |
2084 _has_alloc_profile = true; | |
2085 // -Xconcurrentio | |
2086 } else if (match_option(option, "-Xconcurrentio", &tail)) { | |
2087 FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true); | |
2088 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); | |
2089 FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1); | |
2090 FLAG_SET_CMDLINE(bool, UseTLAB, false); | |
2091 FLAG_SET_CMDLINE(uintx, NewSizeThreadIncrease, 16 * K); // 20Kb per thread added to new generation | |
2092 | |
2093 // -Xinternalversion | |
2094 } else if (match_option(option, "-Xinternalversion", &tail)) { | |
2095 jio_fprintf(defaultStream::output_stream(), "%s\n", | |
2096 VM_Version::internal_vm_info_string()); | |
2097 vm_exit(0); | |
2098 #ifndef PRODUCT | |
2099 // -Xprintflags | |
2100 } else if (match_option(option, "-Xprintflags", &tail)) { | |
2101 CommandLineFlags::printFlags(); | |
2102 vm_exit(0); | |
2103 #endif | |
2104 // -D | |
2105 } else if (match_option(option, "-D", &tail)) { | |
2106 if (!add_property(tail)) { | |
2107 return JNI_ENOMEM; | |
2108 } | |
2109 // Out of the box management support | |
2110 if (match_option(option, "-Dcom.sun.management", &tail)) { | |
2111 FLAG_SET_CMDLINE(bool, ManagementServer, true); | |
2112 } | |
2113 // -Xint | |
2114 } else if (match_option(option, "-Xint", &tail)) { | |
2115 set_mode_flags(_int); | |
2116 // -Xmixed | |
2117 } else if (match_option(option, "-Xmixed", &tail)) { | |
2118 set_mode_flags(_mixed); | |
2119 // -Xcomp | |
2120 } else if (match_option(option, "-Xcomp", &tail)) { | |
2121 // for testing the compiler; turn off all flags that inhibit compilation | |
2122 set_mode_flags(_comp); | |
2123 | |
2124 // -Xshare:dump | |
2125 } else if (match_option(option, "-Xshare:dump", &tail)) { | |
2126 #ifdef TIERED | |
2127 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); | |
2128 set_mode_flags(_int); // Prevent compilation, which creates objects | |
2129 #elif defined(COMPILER2) | |
2130 vm_exit_during_initialization( | |
2131 "Dumping a shared archive is not supported on the Server JVM.", NULL); | |
2132 #elif defined(KERNEL) | |
2133 vm_exit_during_initialization( | |
2134 "Dumping a shared archive is not supported on the Kernel JVM.", NULL); | |
2135 #else | |
2136 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); | |
2137 set_mode_flags(_int); // Prevent compilation, which creates objects | |
2138 #endif | |
2139 // -Xshare:on | |
2140 } else if (match_option(option, "-Xshare:on", &tail)) { | |
2141 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); | |
2142 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true); | |
2143 #ifdef TIERED | |
2144 FLAG_SET_CMDLINE(bool, ForceSharedSpaces, true); | |
2145 #endif // TIERED | |
2146 // -Xshare:auto | |
2147 } else if (match_option(option, "-Xshare:auto", &tail)) { | |
2148 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); | |
2149 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); | |
2150 // -Xshare:off | |
2151 } else if (match_option(option, "-Xshare:off", &tail)) { | |
2152 FLAG_SET_CMDLINE(bool, UseSharedSpaces, false); | |
2153 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); | |
2154 | |
2155 // -Xverify | |
2156 } else if (match_option(option, "-Xverify", &tail)) { | |
2157 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) { | |
2158 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true); | |
2159 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); | |
2160 } else if (strcmp(tail, ":remote") == 0) { | |
2161 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); | |
2162 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); | |
2163 } else if (strcmp(tail, ":none") == 0) { | |
2164 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); | |
2165 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false); | |
2166 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) { | |
2167 return JNI_EINVAL; | |
2168 } | |
2169 // -Xdebug | |
2170 } else if (match_option(option, "-Xdebug", &tail)) { | |
2171 // note this flag has been used, then ignore | |
2172 set_xdebug_mode(true); | |
2173 // -Xnoagent | |
2174 } else if (match_option(option, "-Xnoagent", &tail)) { | |
2175 // For compatibility with classic. HotSpot refuses to load the old style agent.dll. | |
2176 } else if (match_option(option, "-Xboundthreads", &tail)) { | |
2177 // Bind user level threads to kernel threads (Solaris only) | |
2178 FLAG_SET_CMDLINE(bool, UseBoundThreads, true); | |
2179 } else if (match_option(option, "-Xloggc:", &tail)) { | |
2180 // Redirect GC output to the file. -Xloggc:<filename> | |
2181 // ostream_init_log(), when called will use this filename | |
2182 // to initialize a fileStream. | |
2183 _gc_log_filename = strdup(tail); | |
2184 FLAG_SET_CMDLINE(bool, PrintGC, true); | |
2185 FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true); | |
2186 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); | |
2187 | |
2188 // JNI hooks | |
2189 } else if (match_option(option, "-Xcheck", &tail)) { | |
2190 if (!strcmp(tail, ":jni")) { | |
2191 CheckJNICalls = true; | |
2192 } else if (is_bad_option(option, args->ignoreUnrecognized, | |
2193 "check")) { | |
2194 return JNI_EINVAL; | |
2195 } | |
2196 } else if (match_option(option, "vfprintf", &tail)) { | |
2197 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo); | |
2198 } else if (match_option(option, "exit", &tail)) { | |
2199 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo); | |
2200 } else if (match_option(option, "abort", &tail)) { | |
2201 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo); | |
2202 // -XX:+AggressiveHeap | |
2203 } else if (match_option(option, "-XX:+AggressiveHeap", &tail)) { | |
2204 | |
2205 // This option inspects the machine and attempts to set various | |
2206 // parameters to be optimal for long-running, memory allocation | |
2207 // intensive jobs. It is intended for machines with large | |
2208 // amounts of cpu and memory. | |
2209 | |
2210 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit | |
2211 // VM, but we may not be able to represent the total physical memory | |
2212 // available (like having 8gb of memory on a box but using a 32bit VM). | |
2213 // Thus, we need to make sure we're using a julong for intermediate | |
2214 // calculations. | |
2215 julong initHeapSize; | |
2216 julong total_memory = os::physical_memory(); | |
2217 | |
2218 if (total_memory < (julong)256*M) { | |
2219 jio_fprintf(defaultStream::error_stream(), | |
2220 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n"); | |
2221 vm_exit(1); | |
2222 } | |
2223 | |
2224 // The heap size is half of available memory, or (at most) | |
2225 // all of possible memory less 160mb (leaving room for the OS | |
2226 // when using ISM). This is the maximum; because adaptive sizing | |
2227 // is turned on below, the actual space used may be smaller. | |
2228 | |
2229 initHeapSize = MIN2(total_memory / (julong)2, | |
2230 total_memory - (julong)160*M); | |
2231 | |
2232 // Make sure that if we have a lot of memory we cap the 32 bit | |
2233 // process space. The 64bit VM version of this function is a nop. | |
2234 initHeapSize = os::allocatable_physical_memory(initHeapSize); | |
2235 | |
2236 // The perm gen is separate but contiguous with the | |
2237 // object heap (and is reserved with it) so subtract it | |
2238 // from the heap size. | |
2239 if (initHeapSize > MaxPermSize) { | |
2240 initHeapSize = initHeapSize - MaxPermSize; | |
2241 } else { | |
2242 warning("AggressiveHeap and MaxPermSize values may conflict"); | |
2243 } | |
2244 | |
2245 if (FLAG_IS_DEFAULT(MaxHeapSize)) { | |
2246 FLAG_SET_CMDLINE(uintx, MaxHeapSize, initHeapSize); | |
1064 | 2247 FLAG_SET_CMDLINE(uintx, InitialHeapSize, initHeapSize); |
0 | 2248 // Currently the minimum size and the initial heap sizes are the same. |
1064 | 2249 set_min_heap_size(initHeapSize); |
0 | 2250 } |
2251 if (FLAG_IS_DEFAULT(NewSize)) { | |
2252 // Make the young generation 3/8ths of the total heap. | |
2253 FLAG_SET_CMDLINE(uintx, NewSize, | |
2254 ((julong)MaxHeapSize / (julong)8) * (julong)3); | |
2255 FLAG_SET_CMDLINE(uintx, MaxNewSize, NewSize); | |
2256 } | |
2257 | |
2258 FLAG_SET_DEFAULT(UseLargePages, true); | |
2259 | |
2260 // Increase some data structure sizes for efficiency | |
2261 FLAG_SET_CMDLINE(uintx, BaseFootPrintEstimate, MaxHeapSize); | |
2262 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); | |
2263 FLAG_SET_CMDLINE(uintx, TLABSize, 256*K); | |
2264 | |
2265 // See the OldPLABSize comment below, but replace 'after promotion' | |
2266 // with 'after copying'. YoungPLABSize is the size of the survivor | |
2267 // space per-gc-thread buffers. The default is 4kw. | |
2268 FLAG_SET_CMDLINE(uintx, YoungPLABSize, 256*K); // Note: this is in words | |
2269 | |
2270 // OldPLABSize is the size of the buffers in the old gen that | |
2271 // UseParallelGC uses to promote live data that doesn't fit in the | |
2272 // survivor spaces. At any given time, there's one for each gc thread. | |
2273 // The default size is 1kw. These buffers are rarely used, since the | |
2274 // survivor spaces are usually big enough. For specjbb, however, there | |
2275 // are occasions when there's lots of live data in the young gen | |
2276 // and we end up promoting some of it. We don't have a definite | |
2277 // explanation for why bumping OldPLABSize helps, but the theory | |
2278 // is that a bigger PLAB results in retaining something like the | |
2279 // original allocation order after promotion, which improves mutator | |
2280 // locality. A minor effect may be that larger PLABs reduce the | |
2281 // number of PLAB allocation events during gc. The value of 8kw | |
2282 // was arrived at by experimenting with specjbb. | |
2283 FLAG_SET_CMDLINE(uintx, OldPLABSize, 8*K); // Note: this is in words | |
2284 | |
2285 // CompilationPolicyChoice=0 causes the server compiler to adopt | |
2286 // a more conservative which-method-do-I-compile policy when one | |
2287 // of the counters maintained by the interpreter trips. The | |
2288 // result is reduced startup time and improved specjbb and | |
2289 // alacrity performance. Zero is the default, but we set it | |
2290 // explicitly here in case the default changes. | |
2291 // See runtime/compilationPolicy.*. | |
2292 FLAG_SET_CMDLINE(intx, CompilationPolicyChoice, 0); | |
2293 | |
2294 // Enable parallel GC and adaptive generation sizing | |
2295 FLAG_SET_CMDLINE(bool, UseParallelGC, true); | |
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2296 FLAG_SET_DEFAULT(ParallelGCThreads, |
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2297 Abstract_VM_Version::parallel_worker_threads()); |
0 | 2298 |
2299 // Encourage steady state memory management | |
2300 FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100); | |
2301 | |
2302 // This appears to improve mutator locality | |
2303 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); | |
2304 | |
2305 // Get around early Solaris scheduling bug | |
2306 // (affinity vs other jobs on system) | |
2307 // but disallow DR and offlining (5008695). | |
2308 FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true); | |
2309 | |
2310 } else if (match_option(option, "-XX:+NeverTenure", &tail)) { | |
2311 // The last option must always win. | |
2312 FLAG_SET_CMDLINE(bool, AlwaysTenure, false); | |
2313 FLAG_SET_CMDLINE(bool, NeverTenure, true); | |
2314 } else if (match_option(option, "-XX:+AlwaysTenure", &tail)) { | |
2315 // The last option must always win. | |
2316 FLAG_SET_CMDLINE(bool, NeverTenure, false); | |
2317 FLAG_SET_CMDLINE(bool, AlwaysTenure, true); | |
2318 } else if (match_option(option, "-XX:+CMSPermGenSweepingEnabled", &tail) || | |
2319 match_option(option, "-XX:-CMSPermGenSweepingEnabled", &tail)) { | |
2320 jio_fprintf(defaultStream::error_stream(), | |
2321 "Please use CMSClassUnloadingEnabled in place of " | |
2322 "CMSPermGenSweepingEnabled in the future\n"); | |
2323 } else if (match_option(option, "-XX:+UseGCTimeLimit", &tail)) { | |
2324 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, true); | |
2325 jio_fprintf(defaultStream::error_stream(), | |
2326 "Please use -XX:+UseGCOverheadLimit in place of " | |
2327 "-XX:+UseGCTimeLimit in the future\n"); | |
2328 } else if (match_option(option, "-XX:-UseGCTimeLimit", &tail)) { | |
2329 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, false); | |
2330 jio_fprintf(defaultStream::error_stream(), | |
2331 "Please use -XX:-UseGCOverheadLimit in place of " | |
2332 "-XX:-UseGCTimeLimit in the future\n"); | |
2333 // The TLE options are for compatibility with 1.3 and will be | |
2334 // removed without notice in a future release. These options | |
2335 // are not to be documented. | |
2336 } else if (match_option(option, "-XX:MaxTLERatio=", &tail)) { | |
2337 // No longer used. | |
2338 } else if (match_option(option, "-XX:+ResizeTLE", &tail)) { | |
2339 FLAG_SET_CMDLINE(bool, ResizeTLAB, true); | |
2340 } else if (match_option(option, "-XX:-ResizeTLE", &tail)) { | |
2341 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); | |
2342 } else if (match_option(option, "-XX:+PrintTLE", &tail)) { | |
2343 FLAG_SET_CMDLINE(bool, PrintTLAB, true); | |
2344 } else if (match_option(option, "-XX:-PrintTLE", &tail)) { | |
2345 FLAG_SET_CMDLINE(bool, PrintTLAB, false); | |
2346 } else if (match_option(option, "-XX:TLEFragmentationRatio=", &tail)) { | |
2347 // No longer used. | |
2348 } else if (match_option(option, "-XX:TLESize=", &tail)) { | |
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2349 julong long_tlab_size = 0; |
0 | 2350 ArgsRange errcode = parse_memory_size(tail, &long_tlab_size, 1); |
2351 if (errcode != arg_in_range) { | |
2352 jio_fprintf(defaultStream::error_stream(), | |
2353 "Invalid TLAB size: %s\n", option->optionString); | |
2354 describe_range_error(errcode); | |
2355 return JNI_EINVAL; | |
2356 } | |
2357 FLAG_SET_CMDLINE(uintx, TLABSize, long_tlab_size); | |
2358 } else if (match_option(option, "-XX:TLEThreadRatio=", &tail)) { | |
2359 // No longer used. | |
2360 } else if (match_option(option, "-XX:+UseTLE", &tail)) { | |
2361 FLAG_SET_CMDLINE(bool, UseTLAB, true); | |
2362 } else if (match_option(option, "-XX:-UseTLE", &tail)) { | |
2363 FLAG_SET_CMDLINE(bool, UseTLAB, false); | |
2364 SOLARIS_ONLY( | |
2365 } else if (match_option(option, "-XX:+UsePermISM", &tail)) { | |
2366 warning("-XX:+UsePermISM is obsolete."); | |
2367 FLAG_SET_CMDLINE(bool, UseISM, true); | |
2368 } else if (match_option(option, "-XX:-UsePermISM", &tail)) { | |
2369 FLAG_SET_CMDLINE(bool, UseISM, false); | |
2370 ) | |
2371 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr", &tail)) { | |
2372 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false); | |
2373 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true); | |
2374 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout", &tail)) { | |
2375 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false); | |
2376 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true); | |
2377 } else if (match_option(option, "-XX:+ExtendedDTraceProbes", &tail)) { | |
2378 #ifdef SOLARIS | |
2379 FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true); | |
2380 FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true); | |
2381 FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true); | |
2382 FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true); | |
2383 #else // ndef SOLARIS | |
2384 jio_fprintf(defaultStream::error_stream(), | |
2385 "ExtendedDTraceProbes flag is only applicable on Solaris\n"); | |
2386 return JNI_EINVAL; | |
2387 #endif // ndef SOLARIS | |
2388 #ifdef ASSERT | |
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2389 } else if (match_option(option, "-XX:+FullGCALot", &tail)) { |
0 | 2390 FLAG_SET_CMDLINE(bool, FullGCALot, true); |
2391 // disable scavenge before parallel mark-compact | |
2392 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); | |
2393 #endif | |
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2394 } else if (match_option(option, "-XX:CMSParPromoteBlocksToClaim=", &tail)) { |
0 | 2395 julong cms_blocks_to_claim = (julong)atol(tail); |
2396 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); | |
2397 jio_fprintf(defaultStream::error_stream(), | |
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2398 "Please use -XX:OldPLABSize in place of " |
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2399 "-XX:CMSParPromoteBlocksToClaim in the future\n"); |
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2400 } else if (match_option(option, "-XX:ParCMSPromoteBlocksToClaim=", &tail)) { |
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2401 julong cms_blocks_to_claim = (julong)atol(tail); |
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2402 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); |
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2403 jio_fprintf(defaultStream::error_stream(), |
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2404 "Please use -XX:OldPLABSize in place of " |
0 | 2405 "-XX:ParCMSPromoteBlocksToClaim in the future\n"); |
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2406 } else if (match_option(option, "-XX:ParallelGCOldGenAllocBufferSize=", &tail)) { |
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2407 julong old_plab_size = 0; |
0 | 2408 ArgsRange errcode = parse_memory_size(tail, &old_plab_size, 1); |
2409 if (errcode != arg_in_range) { | |
2410 jio_fprintf(defaultStream::error_stream(), | |
2411 "Invalid old PLAB size: %s\n", option->optionString); | |
2412 describe_range_error(errcode); | |
2413 return JNI_EINVAL; | |
2414 } | |
489
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2415 FLAG_SET_CMDLINE(uintx, OldPLABSize, old_plab_size); |
0 | 2416 jio_fprintf(defaultStream::error_stream(), |
2417 "Please use -XX:OldPLABSize in place of " | |
2418 "-XX:ParallelGCOldGenAllocBufferSize in the future\n"); | |
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|
2419 } else if (match_option(option, "-XX:ParallelGCToSpaceAllocBufferSize=", &tail)) { |
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2420 julong young_plab_size = 0; |
0 | 2421 ArgsRange errcode = parse_memory_size(tail, &young_plab_size, 1); |
2422 if (errcode != arg_in_range) { | |
2423 jio_fprintf(defaultStream::error_stream(), | |
2424 "Invalid young PLAB size: %s\n", option->optionString); | |
2425 describe_range_error(errcode); | |
2426 return JNI_EINVAL; | |
2427 } | |
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|
2428 FLAG_SET_CMDLINE(uintx, YoungPLABSize, young_plab_size); |
0 | 2429 jio_fprintf(defaultStream::error_stream(), |
2430 "Please use -XX:YoungPLABSize in place of " | |
2431 "-XX:ParallelGCToSpaceAllocBufferSize in the future\n"); | |
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|
2432 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx |
0 | 2433 // Skip -XX:Flags= since that case has already been handled |
2434 if (strncmp(tail, "Flags=", strlen("Flags=")) != 0) { | |
2435 if (!process_argument(tail, args->ignoreUnrecognized, origin)) { | |
2436 return JNI_EINVAL; | |
2437 } | |
2438 } | |
2439 // Unknown option | |
2440 } else if (is_bad_option(option, args->ignoreUnrecognized)) { | |
2441 return JNI_ERR; | |
2442 } | |
2443 } | |
449
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2444 // Change the default value for flags which have different default values |
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2445 // when working with older JDKs. |
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|
2446 if (JDK_Version::current().compare_major(6) <= 0 && |
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|
2447 FLAG_IS_DEFAULT(UseVMInterruptibleIO)) { |
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2448 FLAG_SET_DEFAULT(UseVMInterruptibleIO, true); |
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2449 } |
0 | 2450 return JNI_OK; |
2451 } | |
2452 | |
2453 jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) { | |
2454 // This must be done after all -D arguments have been processed. | |
2455 scp_p->expand_endorsed(); | |
2456 | |
2457 if (scp_assembly_required || scp_p->get_endorsed() != NULL) { | |
2458 // Assemble the bootclasspath elements into the final path. | |
2459 Arguments::set_sysclasspath(scp_p->combined_path()); | |
2460 } | |
2461 | |
2462 // This must be done after all arguments have been processed. | |
2463 // java_compiler() true means set to "NONE" or empty. | |
2464 if (java_compiler() && !xdebug_mode()) { | |
2465 // For backwards compatibility, we switch to interpreted mode if | |
2466 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was | |
2467 // not specified. | |
2468 set_mode_flags(_int); | |
2469 } | |
2470 if (CompileThreshold == 0) { | |
2471 set_mode_flags(_int); | |
2472 } | |
2473 | |
2474 #ifdef TIERED | |
2475 // If we are using tiered compilation in the tiered vm then c1 will | |
2476 // do the profiling and we don't want to waste that time in the | |
2477 // interpreter. | |
2478 if (TieredCompilation) { | |
2479 ProfileInterpreter = false; | |
2480 } else { | |
2481 // Since we are running vanilla server we must adjust the compile threshold | |
2482 // unless the user has already adjusted it because the default threshold assumes | |
2483 // we will run tiered. | |
2484 | |
2485 if (FLAG_IS_DEFAULT(CompileThreshold)) { | |
2486 CompileThreshold = Tier2CompileThreshold; | |
2487 } | |
2488 } | |
2489 #endif // TIERED | |
2490 | |
2491 #ifndef COMPILER2 | |
2492 // Don't degrade server performance for footprint | |
2493 if (FLAG_IS_DEFAULT(UseLargePages) && | |
2494 MaxHeapSize < LargePageHeapSizeThreshold) { | |
2495 // No need for large granularity pages w/small heaps. | |
2496 // Note that large pages are enabled/disabled for both the | |
2497 // Java heap and the code cache. | |
2498 FLAG_SET_DEFAULT(UseLargePages, false); | |
2499 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseMPSS, false)); | |
2500 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseISM, false)); | |
2501 } | |
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2502 |
0 | 2503 #else |
2504 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) { | |
2505 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1); | |
2506 } | |
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2507 // Temporary disable bulk zeroing reduction with G1. See CR 6627983. |
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2508 if (UseG1GC) { |
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2509 FLAG_SET_DEFAULT(ReduceBulkZeroing, false); |
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2510 } |
0 | 2511 #endif |
2512 | |
2513 if (!check_vm_args_consistency()) { | |
2514 return JNI_ERR; | |
2515 } | |
2516 | |
2517 return JNI_OK; | |
2518 } | |
2519 | |
2520 jint Arguments::parse_java_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { | |
2521 return parse_options_environment_variable("_JAVA_OPTIONS", scp_p, | |
2522 scp_assembly_required_p); | |
2523 } | |
2524 | |
2525 jint Arguments::parse_java_tool_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { | |
2526 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", scp_p, | |
2527 scp_assembly_required_p); | |
2528 } | |
2529 | |
2530 jint Arguments::parse_options_environment_variable(const char* name, SysClassPath* scp_p, bool* scp_assembly_required_p) { | |
2531 const int N_MAX_OPTIONS = 64; | |
2532 const int OPTION_BUFFER_SIZE = 1024; | |
2533 char buffer[OPTION_BUFFER_SIZE]; | |
2534 | |
2535 // The variable will be ignored if it exceeds the length of the buffer. | |
2536 // Don't check this variable if user has special privileges | |
2537 // (e.g. unix su command). | |
2538 if (os::getenv(name, buffer, sizeof(buffer)) && | |
2539 !os::have_special_privileges()) { | |
2540 JavaVMOption options[N_MAX_OPTIONS]; // Construct option array | |
2541 jio_fprintf(defaultStream::error_stream(), | |
2542 "Picked up %s: %s\n", name, buffer); | |
2543 char* rd = buffer; // pointer to the input string (rd) | |
2544 int i; | |
2545 for (i = 0; i < N_MAX_OPTIONS;) { // repeat for all options in the input string | |
2546 while (isspace(*rd)) rd++; // skip whitespace | |
2547 if (*rd == 0) break; // we re done when the input string is read completely | |
2548 | |
2549 // The output, option string, overwrites the input string. | |
2550 // Because of quoting, the pointer to the option string (wrt) may lag the pointer to | |
2551 // input string (rd). | |
2552 char* wrt = rd; | |
2553 | |
2554 options[i++].optionString = wrt; // Fill in option | |
2555 while (*rd != 0 && !isspace(*rd)) { // unquoted strings terminate with a space or NULL | |
2556 if (*rd == '\'' || *rd == '"') { // handle a quoted string | |
2557 int quote = *rd; // matching quote to look for | |
2558 rd++; // don't copy open quote | |
2559 while (*rd != quote) { // include everything (even spaces) up until quote | |
2560 if (*rd == 0) { // string termination means unmatched string | |
2561 jio_fprintf(defaultStream::error_stream(), | |
2562 "Unmatched quote in %s\n", name); | |
2563 return JNI_ERR; | |
2564 } | |
2565 *wrt++ = *rd++; // copy to option string | |
2566 } | |
2567 rd++; // don't copy close quote | |
2568 } else { | |
2569 *wrt++ = *rd++; // copy to option string | |
2570 } | |
2571 } | |
2572 // Need to check if we're done before writing a NULL, | |
2573 // because the write could be to the byte that rd is pointing to. | |
2574 if (*rd++ == 0) { | |
2575 *wrt = 0; | |
2576 break; | |
2577 } | |
2578 *wrt = 0; // Zero terminate option | |
2579 } | |
2580 // Construct JavaVMInitArgs structure and parse as if it was part of the command line | |
2581 JavaVMInitArgs vm_args; | |
2582 vm_args.version = JNI_VERSION_1_2; | |
2583 vm_args.options = options; | |
2584 vm_args.nOptions = i; | |
564 | 2585 vm_args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions; |
0 | 2586 |
2587 if (PrintVMOptions) { | |
2588 const char* tail; | |
2589 for (int i = 0; i < vm_args.nOptions; i++) { | |
2590 const JavaVMOption *option = vm_args.options + i; | |
2591 if (match_option(option, "-XX:", &tail)) { | |
2592 logOption(tail); | |
2593 } | |
2594 } | |
2595 } | |
2596 | |
2597 return(parse_each_vm_init_arg(&vm_args, scp_p, scp_assembly_required_p, ENVIRON_VAR)); | |
2598 } | |
2599 return JNI_OK; | |
2600 } | |
2601 | |
2602 // Parse entry point called from JNI_CreateJavaVM | |
2603 | |
2604 jint Arguments::parse(const JavaVMInitArgs* args) { | |
2605 | |
2606 // Sharing support | |
2607 // Construct the path to the archive | |
2608 char jvm_path[JVM_MAXPATHLEN]; | |
2609 os::jvm_path(jvm_path, sizeof(jvm_path)); | |
2610 #ifdef TIERED | |
2611 if (strstr(jvm_path, "client") != NULL) { | |
2612 force_client_mode = true; | |
2613 } | |
2614 #endif // TIERED | |
2615 char *end = strrchr(jvm_path, *os::file_separator()); | |
2616 if (end != NULL) *end = '\0'; | |
2617 char *shared_archive_path = NEW_C_HEAP_ARRAY(char, strlen(jvm_path) + | |
2618 strlen(os::file_separator()) + 20); | |
2619 if (shared_archive_path == NULL) return JNI_ENOMEM; | |
2620 strcpy(shared_archive_path, jvm_path); | |
2621 strcat(shared_archive_path, os::file_separator()); | |
2622 strcat(shared_archive_path, "classes"); | |
2623 DEBUG_ONLY(strcat(shared_archive_path, "_g");) | |
2624 strcat(shared_archive_path, ".jsa"); | |
2625 SharedArchivePath = shared_archive_path; | |
2626 | |
2627 // Remaining part of option string | |
2628 const char* tail; | |
2629 | |
2630 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed. | |
2631 bool settings_file_specified = false; | |
564 | 2632 const char* flags_file; |
0 | 2633 int index; |
2634 for (index = 0; index < args->nOptions; index++) { | |
2635 const JavaVMOption *option = args->options + index; | |
2636 if (match_option(option, "-XX:Flags=", &tail)) { | |
564 | 2637 flags_file = tail; |
0 | 2638 settings_file_specified = true; |
2639 } | |
2640 if (match_option(option, "-XX:+PrintVMOptions", &tail)) { | |
2641 PrintVMOptions = true; | |
2642 } | |
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2643 if (match_option(option, "-XX:-PrintVMOptions", &tail)) { |
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2644 PrintVMOptions = false; |
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2645 } |
564 | 2646 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions", &tail)) { |
2647 IgnoreUnrecognizedVMOptions = true; | |
2648 } | |
2649 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions", &tail)) { | |
2650 IgnoreUnrecognizedVMOptions = false; | |
2651 } | |
2652 } | |
2653 | |
2654 if (IgnoreUnrecognizedVMOptions) { | |
2655 // uncast const to modify the flag args->ignoreUnrecognized | |
2656 *(jboolean*)(&args->ignoreUnrecognized) = true; | |
2657 } | |
2658 | |
2659 // Parse specified settings file | |
2660 if (settings_file_specified) { | |
2661 if (!process_settings_file(flags_file, true, args->ignoreUnrecognized)) { | |
2662 return JNI_EINVAL; | |
2663 } | |
0 | 2664 } |
2665 | |
2666 // Parse default .hotspotrc settings file | |
2667 if (!settings_file_specified) { | |
2668 if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) { | |
2669 return JNI_EINVAL; | |
2670 } | |
2671 } | |
2672 | |
2673 if (PrintVMOptions) { | |
2674 for (index = 0; index < args->nOptions; index++) { | |
2675 const JavaVMOption *option = args->options + index; | |
2676 if (match_option(option, "-XX:", &tail)) { | |
2677 logOption(tail); | |
2678 } | |
2679 } | |
2680 } | |
2681 | |
2682 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS | |
2683 jint result = parse_vm_init_args(args); | |
2684 if (result != JNI_OK) { | |
2685 return result; | |
2686 } | |
2687 | |
2688 #ifndef PRODUCT | |
2689 if (TraceBytecodesAt != 0) { | |
2690 TraceBytecodes = true; | |
2691 } | |
2692 if (CountCompiledCalls) { | |
2693 if (UseCounterDecay) { | |
2694 warning("UseCounterDecay disabled because CountCalls is set"); | |
2695 UseCounterDecay = false; | |
2696 } | |
2697 } | |
2698 #endif // PRODUCT | |
2699 | |
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2700 if (EnableInvokeDynamic && !EnableMethodHandles) { |
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|
2701 if (!FLAG_IS_DEFAULT(EnableMethodHandles)) { |
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2702 warning("forcing EnableMethodHandles true because EnableInvokeDynamic is true"); |
726
be93aad57795
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|
2703 } |
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|
2704 EnableMethodHandles = true; |
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|
2705 } |
710 | 2706 if (EnableMethodHandles && !AnonymousClasses) { |
2707 if (!FLAG_IS_DEFAULT(AnonymousClasses)) { | |
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2708 warning("forcing AnonymousClasses true because EnableMethodHandles is true"); |
710 | 2709 } |
2710 AnonymousClasses = true; | |
2711 } | |
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2712 if ((EnableMethodHandles || AnonymousClasses) && ScavengeRootsInCode == 0) { |
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2713 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) { |
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|
2714 warning("forcing ScavengeRootsInCode non-zero because EnableMethodHandles or AnonymousClasses is true"); |
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|
2715 } |
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|
2716 ScavengeRootsInCode = 1; |
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|
2717 } |
710 | 2718 |
0 | 2719 if (PrintGCDetails) { |
2720 // Turn on -verbose:gc options as well | |
2721 PrintGC = true; | |
2722 } | |
2723 | |
1060 | 2724 #if defined(_LP64) && defined(COMPILER1) |
2725 UseCompressedOops = false; | |
2726 #endif | |
2727 | |
0 | 2728 #ifdef SERIALGC |
1064 | 2729 force_serial_gc(); |
0 | 2730 #endif // SERIALGC |
2731 #ifdef KERNEL | |
2732 no_shared_spaces(); | |
2733 #endif // KERNEL | |
2734 | |
2735 // Set flags based on ergonomics. | |
2736 set_ergonomics_flags(); | |
2737 | |
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|
2738 // Check the GC selections again. |
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|
2739 if (!check_gc_consistency()) { |
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|
2740 return JNI_EINVAL; |
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|
2741 } |
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|
2742 |
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|
2743 #ifndef KERNEL |
1064 | 2744 if (UseConcMarkSweepGC) { |
2745 // Set flags for CMS and ParNew. Check UseConcMarkSweep first | |
2746 // to ensure that when both UseConcMarkSweepGC and UseParNewGC | |
2747 // are true, we don't call set_parnew_gc_flags() as well. | |
10
28372612af5e
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|
2748 set_cms_and_parnew_gc_flags(); |
1064 | 2749 } else { |
2750 // Set heap size based on available physical memory | |
2751 set_heap_size(); | |
2752 // Set per-collector flags | |
2753 if (UseParallelGC || UseParallelOldGC) { | |
2754 set_parallel_gc_flags(); | |
2755 } else if (UseParNewGC) { | |
2756 set_parnew_gc_flags(); | |
2757 } else if (UseG1GC) { | |
2758 set_g1_gc_flags(); | |
2759 } | |
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2760 } |
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2761 #endif // KERNEL |
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2762 |
0 | 2763 #ifdef SERIALGC |
2764 assert(verify_serial_gc_flags(), "SerialGC unset"); | |
2765 #endif // SERIALGC | |
2766 | |
2767 // Set bytecode rewriting flags | |
2768 set_bytecode_flags(); | |
2769 | |
2770 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled. | |
2771 set_aggressive_opts_flags(); | |
2772 | |
2773 #ifdef CC_INTERP | |
2774 // Biased locking is not implemented with c++ interpreter | |
2775 FLAG_SET_DEFAULT(UseBiasedLocking, false); | |
2776 #endif /* CC_INTERP */ | |
2777 | |
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a1980da045cc
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|
2778 #ifdef COMPILER2 |
a1980da045cc
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|
2779 if (!UseBiasedLocking || EmitSync != 0) { |
a1980da045cc
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|
2780 UseOptoBiasInlining = false; |
a1980da045cc
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|
2781 } |
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|
2782 #endif |
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2783 |
0 | 2784 if (PrintCommandLineFlags) { |
2785 CommandLineFlags::printSetFlags(); | |
2786 } | |
2787 | |
10
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2788 #ifdef ASSERT |
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|
2789 if (PrintFlagsFinal) { |
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|
2790 CommandLineFlags::printFlags(); |
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|
2791 } |
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|
2792 #endif |
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|
2793 |
0 | 2794 return JNI_OK; |
2795 } | |
2796 | |
2797 int Arguments::PropertyList_count(SystemProperty* pl) { | |
2798 int count = 0; | |
2799 while(pl != NULL) { | |
2800 count++; | |
2801 pl = pl->next(); | |
2802 } | |
2803 return count; | |
2804 } | |
2805 | |
2806 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) { | |
2807 assert(key != NULL, "just checking"); | |
2808 SystemProperty* prop; | |
2809 for (prop = pl; prop != NULL; prop = prop->next()) { | |
2810 if (strcmp(key, prop->key()) == 0) return prop->value(); | |
2811 } | |
2812 return NULL; | |
2813 } | |
2814 | |
2815 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) { | |
2816 int count = 0; | |
2817 const char* ret_val = NULL; | |
2818 | |
2819 while(pl != NULL) { | |
2820 if(count >= index) { | |
2821 ret_val = pl->key(); | |
2822 break; | |
2823 } | |
2824 count++; | |
2825 pl = pl->next(); | |
2826 } | |
2827 | |
2828 return ret_val; | |
2829 } | |
2830 | |
2831 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) { | |
2832 int count = 0; | |
2833 char* ret_val = NULL; | |
2834 | |
2835 while(pl != NULL) { | |
2836 if(count >= index) { | |
2837 ret_val = pl->value(); | |
2838 break; | |
2839 } | |
2840 count++; | |
2841 pl = pl->next(); | |
2842 } | |
2843 | |
2844 return ret_val; | |
2845 } | |
2846 | |
2847 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) { | |
2848 SystemProperty* p = *plist; | |
2849 if (p == NULL) { | |
2850 *plist = new_p; | |
2851 } else { | |
2852 while (p->next() != NULL) { | |
2853 p = p->next(); | |
2854 } | |
2855 p->set_next(new_p); | |
2856 } | |
2857 } | |
2858 | |
2859 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, char* v) { | |
2860 if (plist == NULL) | |
2861 return; | |
2862 | |
2863 SystemProperty* new_p = new SystemProperty(k, v, true); | |
2864 PropertyList_add(plist, new_p); | |
2865 } | |
2866 | |
2867 // This add maintains unique property key in the list. | |
691 | 2868 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, char* v, jboolean append) { |
0 | 2869 if (plist == NULL) |
2870 return; | |
2871 | |
2872 // If property key exist then update with new value. | |
2873 SystemProperty* prop; | |
2874 for (prop = *plist; prop != NULL; prop = prop->next()) { | |
2875 if (strcmp(k, prop->key()) == 0) { | |
691 | 2876 if (append) { |
2877 prop->append_value(v); | |
2878 } else { | |
2879 prop->set_value(v); | |
2880 } | |
0 | 2881 return; |
2882 } | |
2883 } | |
2884 | |
2885 PropertyList_add(plist, k, v); | |
2886 } | |
2887 | |
2888 #ifdef KERNEL | |
2889 char *Arguments::get_kernel_properties() { | |
2890 // Find properties starting with kernel and append them to string | |
2891 // We need to find out how long they are first because the URL's that they | |
2892 // might point to could get long. | |
2893 int length = 0; | |
2894 SystemProperty* prop; | |
2895 for (prop = _system_properties; prop != NULL; prop = prop->next()) { | |
2896 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { | |
2897 length += (strlen(prop->key()) + strlen(prop->value()) + 5); // "-D =" | |
2898 } | |
2899 } | |
2900 // Add one for null terminator. | |
2901 char *props = AllocateHeap(length + 1, "get_kernel_properties"); | |
2902 if (length != 0) { | |
2903 int pos = 0; | |
2904 for (prop = _system_properties; prop != NULL; prop = prop->next()) { | |
2905 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { | |
2906 jio_snprintf(&props[pos], length-pos, | |
2907 "-D%s=%s ", prop->key(), prop->value()); | |
2908 pos = strlen(props); | |
2909 } | |
2910 } | |
2911 } | |
2912 // null terminate props in case of null | |
2913 props[length] = '\0'; | |
2914 return props; | |
2915 } | |
2916 #endif // KERNEL | |
2917 | |
2918 // Copies src into buf, replacing "%%" with "%" and "%p" with pid | |
2919 // Returns true if all of the source pointed by src has been copied over to | |
2920 // the destination buffer pointed by buf. Otherwise, returns false. | |
2921 // Notes: | |
2922 // 1. If the length (buflen) of the destination buffer excluding the | |
2923 // NULL terminator character is not long enough for holding the expanded | |
2924 // pid characters, it also returns false instead of returning the partially | |
2925 // expanded one. | |
2926 // 2. The passed in "buflen" should be large enough to hold the null terminator. | |
2927 bool Arguments::copy_expand_pid(const char* src, size_t srclen, | |
2928 char* buf, size_t buflen) { | |
2929 const char* p = src; | |
2930 char* b = buf; | |
2931 const char* src_end = &src[srclen]; | |
2932 char* buf_end = &buf[buflen - 1]; | |
2933 | |
2934 while (p < src_end && b < buf_end) { | |
2935 if (*p == '%') { | |
2936 switch (*(++p)) { | |
2937 case '%': // "%%" ==> "%" | |
2938 *b++ = *p++; | |
2939 break; | |
2940 case 'p': { // "%p" ==> current process id | |
2941 // buf_end points to the character before the last character so | |
2942 // that we could write '\0' to the end of the buffer. | |
2943 size_t buf_sz = buf_end - b + 1; | |
2944 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id()); | |
2945 | |
2946 // if jio_snprintf fails or the buffer is not long enough to hold | |
2947 // the expanded pid, returns false. | |
2948 if (ret < 0 || ret >= (int)buf_sz) { | |
2949 return false; | |
2950 } else { | |
2951 b += ret; | |
2952 assert(*b == '\0', "fail in copy_expand_pid"); | |
2953 if (p == src_end && b == buf_end + 1) { | |
2954 // reach the end of the buffer. | |
2955 return true; | |
2956 } | |
2957 } | |
2958 p++; | |
2959 break; | |
2960 } | |
2961 default : | |
2962 *b++ = '%'; | |
2963 } | |
2964 } else { | |
2965 *b++ = *p++; | |
2966 } | |
2967 } | |
2968 *b = '\0'; | |
2969 return (p == src_end); // return false if not all of the source was copied | |
2970 } |