Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/arguments.cpp @ 1679:3d90023429ec
6888526: Linux getCurrentThreadCpuTime is drastically slower than Windows
Reviewed-by: dcubed, dholmes
author | aph |
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date | Wed, 28 Jul 2010 17:38:21 +0100 |
parents | a00567c82f02 |
children | 126ea7725993 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
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. | |
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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"); |
10
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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 } | |
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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 } |
1284 | 1206 if (PrintGCDetails && Verbose) { |
1207 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk", | |
1208 MarkStackSize / K, MarkStackSizeMax / K); | |
1209 tty->print_cr("ConcGCThreads: %u", ConcGCThreads); | |
1210 } | |
0 | 1211 } |
1145
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1212 #endif // KERNEL |
0 | 1213 |
1571
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1214 void set_object_alignment() { |
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1215 // Object alignment. |
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1216 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2"); |
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1217 MinObjAlignmentInBytes = ObjectAlignmentInBytes; |
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1218 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small"); |
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1219 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize; |
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1220 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect"); |
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1221 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1; |
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1222 |
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1223 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes); |
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1224 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize; |
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1225 |
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1226 // Oop encoding heap max |
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1227 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes; |
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1228 |
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1229 #ifndef KERNEL |
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1230 // Set CMS global values |
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1231 CompactibleFreeListSpace::set_cms_values(); |
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1232 #endif // KERNEL |
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1233 } |
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1234 |
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1235 bool verify_object_alignment() { |
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1236 // Object alignment. |
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1237 if (!is_power_of_2(ObjectAlignmentInBytes)) { |
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1238 jio_fprintf(defaultStream::error_stream(), |
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1239 "error: ObjectAlignmentInBytes=%d must be power of 2", (int)ObjectAlignmentInBytes); |
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1240 return false; |
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1241 } |
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1242 if ((int)ObjectAlignmentInBytes < BytesPerLong) { |
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1243 jio_fprintf(defaultStream::error_stream(), |
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1244 "error: ObjectAlignmentInBytes=%d must be greater or equal %d", (int)ObjectAlignmentInBytes, BytesPerLong); |
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1245 return false; |
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1246 } |
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1247 return true; |
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1248 } |
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1249 |
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1250 inline uintx max_heap_for_compressed_oops() { |
1571
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1251 LP64_ONLY(return OopEncodingHeapMax - MaxPermSize - os::vm_page_size()); |
1064 | 1252 NOT_LP64(ShouldNotReachHere(); return 0); |
135
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1253 } |
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1254 |
0 | 1255 bool Arguments::should_auto_select_low_pause_collector() { |
1256 if (UseAutoGCSelectPolicy && | |
1257 !FLAG_IS_DEFAULT(MaxGCPauseMillis) && | |
1258 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) { | |
1259 if (PrintGCDetails) { | |
1260 // Cannot use gclog_or_tty yet. | |
1261 tty->print_cr("Automatic selection of the low pause collector" | |
1262 " based on pause goal of %d (ms)", MaxGCPauseMillis); | |
1263 } | |
1264 return true; | |
1265 } | |
1266 return false; | |
1267 } | |
1268 | |
1269 void Arguments::set_ergonomics_flags() { | |
1270 // Parallel GC is not compatible with sharing. If one specifies | |
1064 | 1271 // that they want sharing explicitly, do not set ergonomics flags. |
0 | 1272 if (DumpSharedSpaces || ForceSharedSpaces) { |
1273 return; | |
1274 } | |
1275 | |
1276 if (os::is_server_class_machine() && !force_client_mode ) { | |
1277 // If no other collector is requested explicitly, | |
1278 // let the VM select the collector based on | |
1279 // machine class and automatic selection policy. | |
1280 if (!UseSerialGC && | |
1281 !UseConcMarkSweepGC && | |
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1282 !UseG1GC && |
0 | 1283 !UseParNewGC && |
1284 !DumpSharedSpaces && | |
1285 FLAG_IS_DEFAULT(UseParallelGC)) { | |
1286 if (should_auto_select_low_pause_collector()) { | |
1287 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true); | |
1288 } else { | |
1289 FLAG_SET_ERGO(bool, UseParallelGC, true); | |
1290 } | |
1291 no_shared_spaces(); | |
1292 } | |
1293 } | |
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1294 |
1010 | 1295 #ifndef ZERO |
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1296 #ifdef _LP64 |
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1297 // Check that UseCompressedOops can be set with the max heap size allocated |
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1298 // by ergonomics. |
187 | 1299 if (MaxHeapSize <= max_heap_for_compressed_oops()) { |
1060 | 1300 #ifndef COMPILER1 |
932 | 1301 if (FLAG_IS_DEFAULT(UseCompressedOops) && !UseG1GC) { |
1302 FLAG_SET_ERGO(bool, UseCompressedOops, true); | |
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1303 } |
1060 | 1304 #endif |
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1305 #ifdef _WIN64 |
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1306 if (UseLargePages && UseCompressedOops) { |
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1307 // Cannot allocate guard pages for implicit checks in indexed addressing |
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1308 // mode, when large pages are specified on windows. |
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1309 // This flag could be switched ON if narrow oop base address is set to 0, |
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1310 // see code in Universe::initialize_heap(). |
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1311 Universe::set_narrow_oop_use_implicit_null_checks(false); |
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1312 } |
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1313 #endif // _WIN64 |
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1314 } else { |
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1315 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) { |
344 | 1316 warning("Max heap size too large for Compressed Oops"); |
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1317 FLAG_SET_DEFAULT(UseCompressedOops, false); |
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1318 } |
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1319 } |
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1320 // Also checks that certain machines are slower with compressed oops |
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1321 // in vm_version initialization code. |
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1322 #endif // _LP64 |
1010 | 1323 #endif // !ZERO |
0 | 1324 } |
1325 | |
1326 void Arguments::set_parallel_gc_flags() { | |
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1327 assert(UseParallelGC || UseParallelOldGC, "Error"); |
0 | 1328 // If parallel old was requested, automatically enable parallel scavenge. |
1329 if (UseParallelOldGC && !UseParallelGC && FLAG_IS_DEFAULT(UseParallelGC)) { | |
1330 FLAG_SET_DEFAULT(UseParallelGC, true); | |
1331 } | |
1332 | |
1333 // If no heap maximum was requested explicitly, use some reasonable fraction | |
1334 // of the physical memory, up to a maximum of 1GB. | |
1335 if (UseParallelGC) { | |
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1336 FLAG_SET_ERGO(uintx, ParallelGCThreads, |
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1337 Abstract_VM_Version::parallel_worker_threads()); |
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1338 |
0 | 1339 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the |
1340 // SurvivorRatio has been set, reset their default values to SurvivorRatio + | |
1341 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger. | |
1342 // See CR 6362902 for details. | |
1343 if (!FLAG_IS_DEFAULT(SurvivorRatio)) { | |
1344 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) { | |
1345 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2); | |
1346 } | |
1347 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) { | |
1348 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2); | |
1349 } | |
1350 } | |
1351 | |
1352 if (UseParallelOldGC) { | |
1353 // Par compact uses lower default values since they are treated as | |
13
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1354 // minimums. These are different defaults because of the different |
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1355 // interpretation and are not ergonomically set. |
0 | 1356 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) { |
13
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1357 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1); |
0 | 1358 } |
1359 if (FLAG_IS_DEFAULT(PermMarkSweepDeadRatio)) { | |
13
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1360 FLAG_SET_DEFAULT(PermMarkSweepDeadRatio, 5); |
0 | 1361 } |
1362 } | |
1363 } | |
1364 } | |
1365 | |
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1366 void Arguments::set_g1_gc_flags() { |
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1367 assert(UseG1GC, "Error"); |
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1368 #ifdef COMPILER1 |
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1369 FastTLABRefill = false; |
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1370 #endif |
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1371 FLAG_SET_DEFAULT(ParallelGCThreads, |
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1372 Abstract_VM_Version::parallel_worker_threads()); |
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1373 if (ParallelGCThreads == 0) { |
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1374 FLAG_SET_DEFAULT(ParallelGCThreads, |
751 | 1375 Abstract_VM_Version::parallel_worker_threads()); |
342
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1376 } |
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1377 no_shared_spaces(); |
751 | 1378 |
1284 | 1379 if (FLAG_IS_DEFAULT(MarkStackSize)) { |
1311
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1380 FLAG_SET_DEFAULT(MarkStackSize, 128 * TASKQUEUE_SIZE); |
1284 | 1381 } |
1382 if (PrintGCDetails && Verbose) { | |
1383 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk", | |
1384 MarkStackSize / K, MarkStackSizeMax / K); | |
1385 tty->print_cr("ConcGCThreads: %u", ConcGCThreads); | |
1386 } | |
1356 | 1387 |
1388 if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) { | |
1389 // In G1, we want the default GC overhead goal to be higher than | |
1390 // say in PS. So we set it here to 10%. Otherwise the heap might | |
1391 // be expanded more aggressively than we would like it to. In | |
1392 // fact, even 10% seems to not be high enough in some cases | |
1393 // (especially small GC stress tests that the main thing they do | |
1394 // is allocation). We might consider increase it further. | |
1395 FLAG_SET_DEFAULT(GCTimeRatio, 9); | |
1396 } | |
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1397 } |
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1398 |
1064 | 1399 void Arguments::set_heap_size() { |
1400 if (!FLAG_IS_DEFAULT(DefaultMaxRAMFraction)) { | |
1401 // Deprecated flag | |
1402 FLAG_SET_CMDLINE(uintx, MaxRAMFraction, DefaultMaxRAMFraction); | |
1403 } | |
1404 | |
1405 const julong phys_mem = | |
1406 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM) | |
1407 : (julong)MaxRAM; | |
1408 | |
1409 // If the maximum heap size has not been set with -Xmx, | |
1410 // then set it as fraction of the size of physical memory, | |
1411 // respecting the maximum and minimum sizes of the heap. | |
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1412 if (FLAG_IS_DEFAULT(MaxHeapSize)) { |
1064 | 1413 julong reasonable_max = phys_mem / MaxRAMFraction; |
1414 | |
1415 if (phys_mem <= MaxHeapSize * MinRAMFraction) { | |
1416 // Small physical memory, so use a minimum fraction of it for the heap | |
1417 reasonable_max = phys_mem / MinRAMFraction; | |
1418 } else { | |
1419 // Not-small physical memory, so require a heap at least | |
1420 // as large as MaxHeapSize | |
1421 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize); | |
1422 } | |
1423 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) { | |
1424 // Limit the heap size to ErgoHeapSizeLimit | |
1425 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit); | |
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1426 } |
1064 | 1427 if (UseCompressedOops) { |
1428 // Limit the heap size to the maximum possible when using compressed oops | |
1429 reasonable_max = MIN2(reasonable_max, (julong)max_heap_for_compressed_oops()); | |
1430 } | |
1431 reasonable_max = os::allocatable_physical_memory(reasonable_max); | |
1432 | |
1433 if (!FLAG_IS_DEFAULT(InitialHeapSize)) { | |
1434 // An initial heap size was specified on the command line, | |
1435 // so be sure that the maximum size is consistent. Done | |
1436 // after call to allocatable_physical_memory because that | |
1437 // method might reduce the allocation size. | |
1438 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize); | |
1439 } | |
1440 | |
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1441 if (PrintGCDetails && Verbose) { |
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1442 // Cannot use gclog_or_tty yet. |
1064 | 1443 tty->print_cr(" Maximum heap size " SIZE_FORMAT, reasonable_max); |
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1444 } |
1064 | 1445 FLAG_SET_ERGO(uintx, MaxHeapSize, (uintx)reasonable_max); |
1446 } | |
1447 | |
1448 // If the initial_heap_size has not been set with InitialHeapSize | |
1449 // or -Xms, then set it as fraction of the size of physical memory, | |
1450 // respecting the maximum and minimum sizes of the heap. | |
1451 if (FLAG_IS_DEFAULT(InitialHeapSize)) { | |
1074
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1452 julong reasonable_minimum = (julong)(OldSize + NewSize); |
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1453 |
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1454 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize); |
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1455 |
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1456 reasonable_minimum = os::allocatable_physical_memory(reasonable_minimum); |
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1457 |
1064 | 1458 julong reasonable_initial = phys_mem / InitialRAMFraction; |
1459 | |
1074
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1460 reasonable_initial = MAX2(reasonable_initial, reasonable_minimum); |
1064 | 1461 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize); |
1462 | |
1463 reasonable_initial = os::allocatable_physical_memory(reasonable_initial); | |
1464 | |
1465 if (PrintGCDetails && Verbose) { | |
1466 // Cannot use gclog_or_tty yet. | |
1467 tty->print_cr(" Initial heap size " SIZE_FORMAT, (uintx)reasonable_initial); | |
1074
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1468 tty->print_cr(" Minimum heap size " SIZE_FORMAT, (uintx)reasonable_minimum); |
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1469 } |
1064 | 1470 FLAG_SET_ERGO(uintx, InitialHeapSize, (uintx)reasonable_initial); |
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1471 set_min_heap_size((uintx)reasonable_minimum); |
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1472 } |
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1473 } |
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1474 |
0 | 1475 // This must be called after ergonomics because we want bytecode rewriting |
1476 // if the server compiler is used, or if UseSharedSpaces is disabled. | |
1477 void Arguments::set_bytecode_flags() { | |
1478 // Better not attempt to store into a read-only space. | |
1479 if (UseSharedSpaces) { | |
1480 FLAG_SET_DEFAULT(RewriteBytecodes, false); | |
1481 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); | |
1482 } | |
1483 | |
1484 if (!RewriteBytecodes) { | |
1485 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); | |
1486 } | |
1487 } | |
1488 | |
1489 // Aggressive optimization flags -XX:+AggressiveOpts | |
1490 void Arguments::set_aggressive_opts_flags() { | |
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|
1491 #ifdef COMPILER2 |
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1492 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) { |
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1493 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { |
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|
1494 FLAG_SET_DEFAULT(EliminateAutoBox, true); |
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1495 } |
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1496 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) { |
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|
1497 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000); |
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|
1498 } |
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|
1499 |
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|
1500 // Feed the cache size setting into the JDK |
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|
1501 char buffer[1024]; |
513
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|
1502 sprintf(buffer, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax); |
17
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|
1503 add_property(buffer); |
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|
1504 } |
65 | 1505 if (AggressiveOpts && FLAG_IS_DEFAULT(DoEscapeAnalysis)) { |
1506 FLAG_SET_DEFAULT(DoEscapeAnalysis, true); | |
1507 } | |
416
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|
1508 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) { |
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1509 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500); |
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|
1510 } |
1622 | 1511 if (AggressiveOpts && FLAG_IS_DEFAULT(OptimizeStringConcat)) { |
1512 FLAG_SET_DEFAULT(OptimizeStringConcat, true); | |
1513 } | |
17
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|
1514 #endif |
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|
1515 |
0 | 1516 if (AggressiveOpts) { |
61 | 1517 // Sample flag setting code |
1518 // if (FLAG_IS_DEFAULT(EliminateZeroing)) { | |
1519 // FLAG_SET_DEFAULT(EliminateZeroing, true); | |
1520 // } | |
0 | 1521 } |
1522 } | |
1523 | |
1524 //=========================================================================================================== | |
1525 // Parsing of java.compiler property | |
1526 | |
1527 void Arguments::process_java_compiler_argument(char* arg) { | |
1528 // For backwards compatibility, Djava.compiler=NONE or "" | |
1529 // causes us to switch to -Xint mode UNLESS -Xdebug | |
1530 // is also specified. | |
1531 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) { | |
1532 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen. | |
1533 } | |
1534 } | |
1535 | |
1536 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) { | |
1537 _sun_java_launcher = strdup(launcher); | |
1538 } | |
1539 | |
1540 bool Arguments::created_by_java_launcher() { | |
1541 assert(_sun_java_launcher != NULL, "property must have value"); | |
1542 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0; | |
1543 } | |
1544 | |
1545 //=========================================================================================================== | |
1546 // Parsing of main arguments | |
1547 | |
1244
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|
1548 bool Arguments::verify_interval(uintx val, uintx min, |
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|
1549 uintx max, const char* name) { |
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|
1550 // Returns true iff value is in the inclusive interval [min..max] |
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|
1551 // false, otherwise. |
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|
1552 if (val >= min && val <= max) { |
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|
1553 return true; |
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|
1554 } |
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|
1555 jio_fprintf(defaultStream::error_stream(), |
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6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
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|
1556 "%s of " UINTX_FORMAT " is invalid; must be between " UINTX_FORMAT |
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|
1557 " and " UINTX_FORMAT "\n", |
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|
1558 name, val, min, max); |
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|
1559 return false; |
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|
1560 } |
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|
1561 |
0 | 1562 bool Arguments::verify_percentage(uintx value, const char* name) { |
1563 if (value <= 100) { | |
1564 return true; | |
1565 } | |
1566 jio_fprintf(defaultStream::error_stream(), | |
1567 "%s of " UINTX_FORMAT " is invalid; must be between 0 and 100\n", | |
1568 name, value); | |
1569 return false; | |
1570 } | |
1571 | |
1064 | 1572 static void force_serial_gc() { |
0 | 1573 FLAG_SET_DEFAULT(UseSerialGC, true); |
1574 FLAG_SET_DEFAULT(UseParNewGC, false); | |
1575 FLAG_SET_DEFAULT(UseConcMarkSweepGC, false); | |
945
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|
1576 FLAG_SET_DEFAULT(CMSIncrementalMode, false); // special CMS suboption |
0 | 1577 FLAG_SET_DEFAULT(UseParallelGC, false); |
1578 FLAG_SET_DEFAULT(UseParallelOldGC, false); | |
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1579 FLAG_SET_DEFAULT(UseG1GC, false); |
0 | 1580 } |
1581 | |
1582 static bool verify_serial_gc_flags() { | |
1583 return (UseSerialGC && | |
945
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1584 !(UseParNewGC || (UseConcMarkSweepGC || CMSIncrementalMode) || UseG1GC || |
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1585 UseParallelGC || UseParallelOldGC)); |
0 | 1586 } |
1587 | |
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|
1588 // Check consistency of GC selection |
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|
1589 bool Arguments::check_gc_consistency() { |
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|
1590 bool status = true; |
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|
1591 // Ensure that the user has not selected conflicting sets |
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|
1592 // of collectors. [Note: this check is merely a user convenience; |
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1593 // collectors over-ride each other so that only a non-conflicting |
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|
1594 // set is selected; however what the user gets is not what they |
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|
1595 // may have expected from the combination they asked for. It's |
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|
1596 // better to reduce user confusion by not allowing them to |
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|
1597 // select conflicting combinations. |
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|
1598 uint i = 0; |
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|
1599 if (UseSerialGC) i++; |
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|
1600 if (UseConcMarkSweepGC || UseParNewGC) i++; |
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|
1601 if (UseParallelGC || UseParallelOldGC) i++; |
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|
1602 if (UseG1GC) i++; |
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|
1603 if (i > 1) { |
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|
1604 jio_fprintf(defaultStream::error_stream(), |
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|
1605 "Conflicting collector combinations in option list; " |
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|
1606 "please refer to the release notes for the combinations " |
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|
1607 "allowed\n"); |
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|
1608 status = false; |
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|
1609 } |
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|
1610 |
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|
1611 return status; |
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|
1612 } |
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|
1613 |
0 | 1614 // Check the consistency of vm_init_args |
1615 bool Arguments::check_vm_args_consistency() { | |
1616 // Method for adding checks for flag consistency. | |
1617 // The intent is to warn the user of all possible conflicts, | |
1618 // before returning an error. | |
1619 // Note: Needs platform-dependent factoring. | |
1620 bool status = true; | |
1621 | |
1622 #if ( (defined(COMPILER2) && defined(SPARC))) | |
1623 // NOTE: The call to VM_Version_init depends on the fact that VM_Version_init | |
1624 // on sparc doesn't require generation of a stub as is the case on, e.g., | |
1625 // x86. Normally, VM_Version_init must be called from init_globals in | |
1626 // init.cpp, which is called by the initial java thread *after* arguments | |
1627 // have been parsed. VM_Version_init gets called twice on sparc. | |
1628 extern void VM_Version_init(); | |
1629 VM_Version_init(); | |
1630 if (!VM_Version::has_v9()) { | |
1631 jio_fprintf(defaultStream::error_stream(), | |
1632 "V8 Machine detected, Server requires V9\n"); | |
1633 status = false; | |
1634 } | |
1635 #endif /* COMPILER2 && SPARC */ | |
1636 | |
1637 // Allow both -XX:-UseStackBanging and -XX:-UseBoundThreads in non-product | |
1638 // builds so the cost of stack banging can be measured. | |
1639 #if (defined(PRODUCT) && defined(SOLARIS)) | |
1640 if (!UseBoundThreads && !UseStackBanging) { | |
1641 jio_fprintf(defaultStream::error_stream(), | |
1642 "-UseStackBanging conflicts with -UseBoundThreads\n"); | |
1643 | |
1644 status = false; | |
1645 } | |
1646 #endif | |
1647 | |
1648 if (TLABRefillWasteFraction == 0) { | |
1649 jio_fprintf(defaultStream::error_stream(), | |
1650 "TLABRefillWasteFraction should be a denominator, " | |
1651 "not " SIZE_FORMAT "\n", | |
1652 TLABRefillWasteFraction); | |
1653 status = false; | |
1654 } | |
1655 | |
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1656 status = status && verify_percentage(MaxLiveObjectEvacuationRatio, |
0 | 1657 "MaxLiveObjectEvacuationRatio"); |
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1658 status = status && verify_percentage(AdaptiveSizePolicyWeight, |
0 | 1659 "AdaptiveSizePolicyWeight"); |
10
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1660 status = status && verify_percentage(AdaptivePermSizeWeight, "AdaptivePermSizeWeight"); |
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1661 status = status && verify_percentage(ThresholdTolerance, "ThresholdTolerance"); |
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1662 status = status && verify_percentage(MinHeapFreeRatio, "MinHeapFreeRatio"); |
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1663 status = status && verify_percentage(MaxHeapFreeRatio, "MaxHeapFreeRatio"); |
0 | 1664 |
1665 if (MinHeapFreeRatio > MaxHeapFreeRatio) { | |
1666 jio_fprintf(defaultStream::error_stream(), | |
1667 "MinHeapFreeRatio (" UINTX_FORMAT ") must be less than or " | |
1668 "equal to MaxHeapFreeRatio (" UINTX_FORMAT ")\n", | |
1669 MinHeapFreeRatio, MaxHeapFreeRatio); | |
1670 status = false; | |
1671 } | |
1672 // Keeping the heap 100% free is hard ;-) so limit it to 99%. | |
1673 MinHeapFreeRatio = MIN2(MinHeapFreeRatio, (uintx) 99); | |
1674 | |
1675 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) { | |
1676 MarkSweepAlwaysCompactCount = 1; // Move objects every gc. | |
1677 } | |
1678 | |
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1679 if (UseParallelOldGC && ParallelOldGCSplitALot) { |
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1680 // Settings to encourage splitting. |
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1681 if (!FLAG_IS_CMDLINE(NewRatio)) { |
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1682 FLAG_SET_CMDLINE(intx, NewRatio, 2); |
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1683 } |
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1684 if (!FLAG_IS_CMDLINE(ScavengeBeforeFullGC)) { |
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1685 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); |
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1686 } |
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1687 } |
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|
1688 |
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1689 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); |
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1690 status = status && verify_percentage(GCTimeLimit, "GCTimeLimit"); |
0 | 1691 if (GCTimeLimit == 100) { |
1692 // Turn off gc-overhead-limit-exceeded checks | |
1693 FLAG_SET_DEFAULT(UseGCOverheadLimit, false); | |
1694 } | |
1695 | |
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1696 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); |
0 | 1697 |
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1698 // Check whether user-specified sharing option conflicts with GC or page size. |
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1699 // Both sharing and large pages are enabled by default on some platforms; |
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1700 // large pages override sharing only if explicitly set on the command line. |
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1701 const bool cannot_share = UseConcMarkSweepGC || CMSIncrementalMode || |
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1702 UseG1GC || UseParNewGC || UseParallelGC || UseParallelOldGC || |
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1703 UseLargePages && FLAG_IS_CMDLINE(UseLargePages); |
0 | 1704 if (cannot_share) { |
1705 // Either force sharing on by forcing the other options off, or | |
1706 // force sharing off. | |
1707 if (DumpSharedSpaces || ForceSharedSpaces) { | |
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1708 jio_fprintf(defaultStream::error_stream(), |
1626
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1709 "Using Serial GC and default page size because of %s\n", |
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1710 ForceSharedSpaces ? "-Xshare:on" : "-Xshare:dump"); |
1064 | 1711 force_serial_gc(); |
1626
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1712 FLAG_SET_DEFAULT(UseLargePages, false); |
0 | 1713 } else { |
1064 | 1714 if (UseSharedSpaces && Verbose) { |
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1715 jio_fprintf(defaultStream::error_stream(), |
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1716 "Turning off use of shared archive because of " |
1064 | 1717 "choice of garbage collector or large pages\n"); |
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1718 } |
0 | 1719 no_shared_spaces(); |
1720 } | |
1626
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1721 } else if (UseLargePages && (UseSharedSpaces || DumpSharedSpaces)) { |
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1722 FLAG_SET_DEFAULT(UseLargePages, false); |
0 | 1723 } |
1724 | |
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1725 status = status && check_gc_consistency(); |
0 | 1726 |
1727 if (_has_alloc_profile) { | |
1728 if (UseParallelGC || UseParallelOldGC) { | |
1729 jio_fprintf(defaultStream::error_stream(), | |
1730 "error: invalid argument combination.\n" | |
1731 "Allocation profiling (-Xaprof) cannot be used together with " | |
1732 "Parallel GC (-XX:+UseParallelGC or -XX:+UseParallelOldGC).\n"); | |
1733 status = false; | |
1734 } | |
1735 if (UseConcMarkSweepGC) { | |
1736 jio_fprintf(defaultStream::error_stream(), | |
1737 "error: invalid argument combination.\n" | |
1738 "Allocation profiling (-Xaprof) cannot be used together with " | |
1739 "the CMS collector (-XX:+UseConcMarkSweepGC).\n"); | |
1740 status = false; | |
1741 } | |
1742 } | |
1743 | |
1744 if (CMSIncrementalMode) { | |
1745 if (!UseConcMarkSweepGC) { | |
1746 jio_fprintf(defaultStream::error_stream(), | |
1747 "error: invalid argument combination.\n" | |
1748 "The CMS collector (-XX:+UseConcMarkSweepGC) must be " | |
1749 "selected in order\nto use CMSIncrementalMode.\n"); | |
1750 status = false; | |
1751 } else { | |
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1752 status = status && verify_percentage(CMSIncrementalDutyCycle, |
0 | 1753 "CMSIncrementalDutyCycle"); |
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1754 status = status && verify_percentage(CMSIncrementalDutyCycleMin, |
0 | 1755 "CMSIncrementalDutyCycleMin"); |
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1756 status = status && verify_percentage(CMSIncrementalSafetyFactor, |
0 | 1757 "CMSIncrementalSafetyFactor"); |
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1758 status = status && verify_percentage(CMSIncrementalOffset, |
0 | 1759 "CMSIncrementalOffset"); |
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1760 status = status && verify_percentage(CMSExpAvgFactor, |
0 | 1761 "CMSExpAvgFactor"); |
1762 // If it was not set on the command line, set | |
1763 // CMSInitiatingOccupancyFraction to 1 so icms can initiate cycles early. | |
1764 if (CMSInitiatingOccupancyFraction < 0) { | |
1765 FLAG_SET_DEFAULT(CMSInitiatingOccupancyFraction, 1); | |
1766 } | |
1767 } | |
1768 } | |
1769 | |
1770 // CMS space iteration, which FLSVerifyAllHeapreferences entails, | |
1771 // insists that we hold the requisite locks so that the iteration is | |
1772 // MT-safe. For the verification at start-up and shut-down, we don't | |
1773 // yet have a good way of acquiring and releasing these locks, | |
1774 // which are not visible at the CollectedHeap level. We want to | |
1775 // be able to acquire these locks and then do the iteration rather | |
1776 // than just disable the lock verification. This will be fixed under | |
1777 // bug 4788986. | |
1778 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) { | |
1779 if (VerifyGCStartAt == 0) { | |
1780 warning("Heap verification at start-up disabled " | |
1781 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); | |
1782 VerifyGCStartAt = 1; // Disable verification at start-up | |
1783 } | |
1784 if (VerifyBeforeExit) { | |
1785 warning("Heap verification at shutdown disabled " | |
1786 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); | |
1787 VerifyBeforeExit = false; // Disable verification at shutdown | |
1788 } | |
1789 } | |
1790 | |
1791 // Note: only executed in non-PRODUCT mode | |
1792 if (!UseAsyncConcMarkSweepGC && | |
1793 (ExplicitGCInvokesConcurrent || | |
1794 ExplicitGCInvokesConcurrentAndUnloadsClasses)) { | |
1795 jio_fprintf(defaultStream::error_stream(), | |
1796 "error: +ExplictGCInvokesConcurrent[AndUnloadsClasses] conflicts" | |
1797 " with -UseAsyncConcMarkSweepGC"); | |
1798 status = false; | |
1799 } | |
1800 | |
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1801 if (UseG1GC) { |
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1802 status = status && verify_percentage(InitiatingHeapOccupancyPercent, |
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1803 "InitiatingHeapOccupancyPercent"); |
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1804 } |
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1805 |
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1806 status = status && verify_interval(RefDiscoveryPolicy, |
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1807 ReferenceProcessor::DiscoveryPolicyMin, |
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|
1808 ReferenceProcessor::DiscoveryPolicyMax, |
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1809 "RefDiscoveryPolicy"); |
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1810 |
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1811 // Limit the lower bound of this flag to 1 as it is used in a division |
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1812 // expression. |
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1813 status = status && verify_interval(TLABWasteTargetPercent, |
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1814 1, 100, "TLABWasteTargetPercent"); |
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1815 |
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1816 status = status && verify_object_alignment(); |
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1817 |
0 | 1818 return status; |
1819 } | |
1820 | |
1821 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore, | |
1822 const char* option_type) { | |
1823 if (ignore) return false; | |
1824 | |
1825 const char* spacer = " "; | |
1826 if (option_type == NULL) { | |
1827 option_type = ++spacer; // Set both to the empty string. | |
1828 } | |
1829 | |
1830 if (os::obsolete_option(option)) { | |
1831 jio_fprintf(defaultStream::error_stream(), | |
1832 "Obsolete %s%soption: %s\n", option_type, spacer, | |
1833 option->optionString); | |
1834 return false; | |
1835 } else { | |
1836 jio_fprintf(defaultStream::error_stream(), | |
1837 "Unrecognized %s%soption: %s\n", option_type, spacer, | |
1838 option->optionString); | |
1839 return true; | |
1840 } | |
1841 } | |
1842 | |
1843 static const char* user_assertion_options[] = { | |
1844 "-da", "-ea", "-disableassertions", "-enableassertions", 0 | |
1845 }; | |
1846 | |
1847 static const char* system_assertion_options[] = { | |
1848 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0 | |
1849 }; | |
1850 | |
1851 // Return true if any of the strings in null-terminated array 'names' matches. | |
1852 // If tail_allowed is true, then the tail must begin with a colon; otherwise, | |
1853 // the option must match exactly. | |
1854 static bool match_option(const JavaVMOption* option, const char** names, const char** tail, | |
1855 bool tail_allowed) { | |
1856 for (/* empty */; *names != NULL; ++names) { | |
1857 if (match_option(option, *names, tail)) { | |
1858 if (**tail == '\0' || tail_allowed && **tail == ':') { | |
1859 return true; | |
1860 } | |
1861 } | |
1862 } | |
1863 return false; | |
1864 } | |
1865 | |
1284 | 1866 bool Arguments::parse_uintx(const char* value, |
1867 uintx* uintx_arg, | |
1868 uintx min_size) { | |
1869 | |
1870 // Check the sign first since atomull() parses only unsigned values. | |
1871 bool value_is_positive = !(*value == '-'); | |
1872 | |
1873 if (value_is_positive) { | |
1874 julong n; | |
1875 bool good_return = atomull(value, &n); | |
1876 if (good_return) { | |
1877 bool above_minimum = n >= min_size; | |
1878 bool value_is_too_large = n > max_uintx; | |
1879 | |
1880 if (above_minimum && !value_is_too_large) { | |
1881 *uintx_arg = n; | |
1882 return true; | |
1883 } | |
1884 } | |
1885 } | |
1886 return false; | |
1887 } | |
1888 | |
0 | 1889 Arguments::ArgsRange Arguments::parse_memory_size(const char* s, |
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1890 julong* long_arg, |
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1891 julong min_size) { |
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1892 if (!atomull(s, long_arg)) return arg_unreadable; |
0 | 1893 return check_memory_size(*long_arg, min_size); |
1894 } | |
1895 | |
1896 // Parse JavaVMInitArgs structure | |
1897 | |
1898 jint Arguments::parse_vm_init_args(const JavaVMInitArgs* args) { | |
1899 // For components of the system classpath. | |
1900 SysClassPath scp(Arguments::get_sysclasspath()); | |
1901 bool scp_assembly_required = false; | |
1902 | |
1903 // Save default settings for some mode flags | |
1904 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; | |
1905 Arguments::_UseOnStackReplacement = UseOnStackReplacement; | |
1906 Arguments::_ClipInlining = ClipInlining; | |
1907 Arguments::_BackgroundCompilation = BackgroundCompilation; | |
1908 Arguments::_Tier2CompileThreshold = Tier2CompileThreshold; | |
1909 | |
1910 // Parse JAVA_TOOL_OPTIONS environment variable (if present) | |
1911 jint result = parse_java_tool_options_environment_variable(&scp, &scp_assembly_required); | |
1912 if (result != JNI_OK) { | |
1913 return result; | |
1914 } | |
1915 | |
1916 // Parse JavaVMInitArgs structure passed in | |
1917 result = parse_each_vm_init_arg(args, &scp, &scp_assembly_required, COMMAND_LINE); | |
1918 if (result != JNI_OK) { | |
1919 return result; | |
1920 } | |
1921 | |
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1922 if (AggressiveOpts) { |
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1923 // Insert alt-rt.jar between user-specified bootclasspath |
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1924 // prefix and the default bootclasspath. os::set_boot_path() |
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1925 // uses meta_index_dir as the default bootclasspath directory. |
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1926 const char* altclasses_jar = "alt-rt.jar"; |
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1927 size_t altclasses_path_len = strlen(get_meta_index_dir()) + 1 + |
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1928 strlen(altclasses_jar); |
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1929 char* altclasses_path = NEW_C_HEAP_ARRAY(char, altclasses_path_len); |
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1930 strcpy(altclasses_path, get_meta_index_dir()); |
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1931 strcat(altclasses_path, altclasses_jar); |
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1932 scp.add_suffix_to_prefix(altclasses_path); |
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1933 scp_assembly_required = true; |
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1934 FREE_C_HEAP_ARRAY(char, altclasses_path); |
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1935 } |
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1936 |
0 | 1937 // Parse _JAVA_OPTIONS environment variable (if present) (mimics classic VM) |
1938 result = parse_java_options_environment_variable(&scp, &scp_assembly_required); | |
1939 if (result != JNI_OK) { | |
1940 return result; | |
1941 } | |
1942 | |
1943 // Do final processing now that all arguments have been parsed | |
1944 result = finalize_vm_init_args(&scp, scp_assembly_required); | |
1945 if (result != JNI_OK) { | |
1946 return result; | |
1947 } | |
1948 | |
1949 return JNI_OK; | |
1950 } | |
1951 | |
1952 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, | |
1953 SysClassPath* scp_p, | |
1954 bool* scp_assembly_required_p, | |
1955 FlagValueOrigin origin) { | |
1956 // Remaining part of option string | |
1957 const char* tail; | |
1958 | |
1959 // iterate over arguments | |
1960 for (int index = 0; index < args->nOptions; index++) { | |
1961 bool is_absolute_path = false; // for -agentpath vs -agentlib | |
1962 | |
1963 const JavaVMOption* option = args->options + index; | |
1964 | |
1965 if (!match_option(option, "-Djava.class.path", &tail) && | |
1966 !match_option(option, "-Dsun.java.command", &tail) && | |
1967 !match_option(option, "-Dsun.java.launcher", &tail)) { | |
1968 | |
1969 // add all jvm options to the jvm_args string. This string | |
1970 // is used later to set the java.vm.args PerfData string constant. | |
1971 // the -Djava.class.path and the -Dsun.java.command options are | |
1972 // omitted from jvm_args string as each have their own PerfData | |
1973 // string constant object. | |
1974 build_jvm_args(option->optionString); | |
1975 } | |
1976 | |
1977 // -verbose:[class/gc/jni] | |
1978 if (match_option(option, "-verbose", &tail)) { | |
1979 if (!strcmp(tail, ":class") || !strcmp(tail, "")) { | |
1980 FLAG_SET_CMDLINE(bool, TraceClassLoading, true); | |
1981 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); | |
1982 } else if (!strcmp(tail, ":gc")) { | |
1983 FLAG_SET_CMDLINE(bool, PrintGC, true); | |
1984 } else if (!strcmp(tail, ":jni")) { | |
1985 FLAG_SET_CMDLINE(bool, PrintJNIResolving, true); | |
1986 } | |
1987 // -da / -ea / -disableassertions / -enableassertions | |
1988 // These accept an optional class/package name separated by a colon, e.g., | |
1989 // -da:java.lang.Thread. | |
1990 } else if (match_option(option, user_assertion_options, &tail, true)) { | |
1991 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' | |
1992 if (*tail == '\0') { | |
1993 JavaAssertions::setUserClassDefault(enable); | |
1994 } else { | |
1995 assert(*tail == ':', "bogus match by match_option()"); | |
1996 JavaAssertions::addOption(tail + 1, enable); | |
1997 } | |
1998 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions | |
1999 } else if (match_option(option, system_assertion_options, &tail, false)) { | |
2000 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' | |
2001 JavaAssertions::setSystemClassDefault(enable); | |
2002 // -bootclasspath: | |
2003 } else if (match_option(option, "-Xbootclasspath:", &tail)) { | |
2004 scp_p->reset_path(tail); | |
2005 *scp_assembly_required_p = true; | |
2006 // -bootclasspath/a: | |
2007 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) { | |
2008 scp_p->add_suffix(tail); | |
2009 *scp_assembly_required_p = true; | |
2010 // -bootclasspath/p: | |
2011 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) { | |
2012 scp_p->add_prefix(tail); | |
2013 *scp_assembly_required_p = true; | |
2014 // -Xrun | |
2015 } else if (match_option(option, "-Xrun", &tail)) { | |
531
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2016 if (tail != NULL) { |
0 | 2017 const char* pos = strchr(tail, ':'); |
2018 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; | |
2019 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); | |
2020 name[len] = '\0'; | |
2021 | |
2022 char *options = NULL; | |
2023 if(pos != NULL) { | |
2024 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied. | |
2025 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2), pos+1, len2); | |
2026 } | |
2027 #ifdef JVMTI_KERNEL | |
2028 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { | |
2029 warning("profiling and debugging agents are not supported with Kernel VM"); | |
2030 } else | |
2031 #endif // JVMTI_KERNEL | |
2032 add_init_library(name, options); | |
2033 } | |
2034 // -agentlib and -agentpath | |
2035 } else if (match_option(option, "-agentlib:", &tail) || | |
2036 (is_absolute_path = match_option(option, "-agentpath:", &tail))) { | |
2037 if(tail != NULL) { | |
2038 const char* pos = strchr(tail, '='); | |
2039 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; | |
2040 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); | |
2041 name[len] = '\0'; | |
2042 | |
2043 char *options = NULL; | |
2044 if(pos != NULL) { | |
2045 options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(pos + 1) + 1), pos + 1); | |
2046 } | |
2047 #ifdef JVMTI_KERNEL | |
2048 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { | |
2049 warning("profiling and debugging agents are not supported with Kernel VM"); | |
2050 } else | |
2051 #endif // JVMTI_KERNEL | |
2052 add_init_agent(name, options, is_absolute_path); | |
2053 | |
2054 } | |
2055 // -javaagent | |
2056 } else if (match_option(option, "-javaagent:", &tail)) { | |
2057 if(tail != NULL) { | |
2058 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1), tail); | |
2059 add_init_agent("instrument", options, false); | |
2060 } | |
2061 // -Xnoclassgc | |
2062 } else if (match_option(option, "-Xnoclassgc", &tail)) { | |
2063 FLAG_SET_CMDLINE(bool, ClassUnloading, false); | |
2064 // -Xincgc: i-CMS | |
2065 } else if (match_option(option, "-Xincgc", &tail)) { | |
2066 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); | |
2067 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, true); | |
2068 // -Xnoincgc: no i-CMS | |
2069 } else if (match_option(option, "-Xnoincgc", &tail)) { | |
2070 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); | |
2071 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, false); | |
2072 // -Xconcgc | |
2073 } else if (match_option(option, "-Xconcgc", &tail)) { | |
2074 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); | |
2075 // -Xnoconcgc | |
2076 } else if (match_option(option, "-Xnoconcgc", &tail)) { | |
2077 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); | |
2078 // -Xbatch | |
2079 } else if (match_option(option, "-Xbatch", &tail)) { | |
2080 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); | |
2081 // -Xmn for compatibility with other JVM vendors | |
2082 } else if (match_option(option, "-Xmn", &tail)) { | |
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2083 julong long_initial_eden_size = 0; |
0 | 2084 ArgsRange errcode = parse_memory_size(tail, &long_initial_eden_size, 1); |
2085 if (errcode != arg_in_range) { | |
2086 jio_fprintf(defaultStream::error_stream(), | |
2087 "Invalid initial eden size: %s\n", option->optionString); | |
2088 describe_range_error(errcode); | |
2089 return JNI_EINVAL; | |
2090 } | |
1064 | 2091 FLAG_SET_CMDLINE(uintx, MaxNewSize, (uintx)long_initial_eden_size); |
2092 FLAG_SET_CMDLINE(uintx, NewSize, (uintx)long_initial_eden_size); | |
0 | 2093 // -Xms |
2094 } else if (match_option(option, "-Xms", &tail)) { | |
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2095 julong long_initial_heap_size = 0; |
0 | 2096 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 1); |
2097 if (errcode != arg_in_range) { | |
2098 jio_fprintf(defaultStream::error_stream(), | |
2099 "Invalid initial heap size: %s\n", option->optionString); | |
2100 describe_range_error(errcode); | |
2101 return JNI_EINVAL; | |
2102 } | |
1064 | 2103 FLAG_SET_CMDLINE(uintx, InitialHeapSize, (uintx)long_initial_heap_size); |
0 | 2104 // Currently the minimum size and the initial heap sizes are the same. |
1064 | 2105 set_min_heap_size(InitialHeapSize); |
0 | 2106 // -Xmx |
2107 } else if (match_option(option, "-Xmx", &tail)) { | |
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2108 julong long_max_heap_size = 0; |
0 | 2109 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1); |
2110 if (errcode != arg_in_range) { | |
2111 jio_fprintf(defaultStream::error_stream(), | |
2112 "Invalid maximum heap size: %s\n", option->optionString); | |
2113 describe_range_error(errcode); | |
2114 return JNI_EINVAL; | |
2115 } | |
1064 | 2116 FLAG_SET_CMDLINE(uintx, MaxHeapSize, (uintx)long_max_heap_size); |
0 | 2117 // Xmaxf |
2118 } else if (match_option(option, "-Xmaxf", &tail)) { | |
2119 int maxf = (int)(atof(tail) * 100); | |
2120 if (maxf < 0 || maxf > 100) { | |
2121 jio_fprintf(defaultStream::error_stream(), | |
2122 "Bad max heap free percentage size: %s\n", | |
2123 option->optionString); | |
2124 return JNI_EINVAL; | |
2125 } else { | |
2126 FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf); | |
2127 } | |
2128 // Xminf | |
2129 } else if (match_option(option, "-Xminf", &tail)) { | |
2130 int minf = (int)(atof(tail) * 100); | |
2131 if (minf < 0 || minf > 100) { | |
2132 jio_fprintf(defaultStream::error_stream(), | |
2133 "Bad min heap free percentage size: %s\n", | |
2134 option->optionString); | |
2135 return JNI_EINVAL; | |
2136 } else { | |
2137 FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf); | |
2138 } | |
2139 // -Xss | |
2140 } else if (match_option(option, "-Xss", &tail)) { | |
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2141 julong long_ThreadStackSize = 0; |
0 | 2142 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000); |
2143 if (errcode != arg_in_range) { | |
2144 jio_fprintf(defaultStream::error_stream(), | |
2145 "Invalid thread stack size: %s\n", option->optionString); | |
2146 describe_range_error(errcode); | |
2147 return JNI_EINVAL; | |
2148 } | |
2149 // Internally track ThreadStackSize in units of 1024 bytes. | |
2150 FLAG_SET_CMDLINE(intx, ThreadStackSize, | |
2151 round_to((int)long_ThreadStackSize, K) / K); | |
2152 // -Xoss | |
2153 } else if (match_option(option, "-Xoss", &tail)) { | |
2154 // HotSpot does not have separate native and Java stacks, ignore silently for compatibility | |
2155 // -Xmaxjitcodesize | |
2156 } else if (match_option(option, "-Xmaxjitcodesize", &tail)) { | |
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2157 julong long_ReservedCodeCacheSize = 0; |
0 | 2158 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, |
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2159 (size_t)InitialCodeCacheSize); |
0 | 2160 if (errcode != arg_in_range) { |
2161 jio_fprintf(defaultStream::error_stream(), | |
2162 "Invalid maximum code cache size: %s\n", | |
2163 option->optionString); | |
2164 describe_range_error(errcode); | |
2165 return JNI_EINVAL; | |
2166 } | |
2167 FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize); | |
2168 // -green | |
2169 } else if (match_option(option, "-green", &tail)) { | |
2170 jio_fprintf(defaultStream::error_stream(), | |
2171 "Green threads support not available\n"); | |
2172 return JNI_EINVAL; | |
2173 // -native | |
2174 } else if (match_option(option, "-native", &tail)) { | |
2175 // HotSpot always uses native threads, ignore silently for compatibility | |
2176 // -Xsqnopause | |
2177 } else if (match_option(option, "-Xsqnopause", &tail)) { | |
2178 // EVM option, ignore silently for compatibility | |
2179 // -Xrs | |
2180 } else if (match_option(option, "-Xrs", &tail)) { | |
2181 // Classic/EVM option, new functionality | |
2182 FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true); | |
2183 } else if (match_option(option, "-Xusealtsigs", &tail)) { | |
2184 // change default internal VM signals used - lower case for back compat | |
2185 FLAG_SET_CMDLINE(bool, UseAltSigs, true); | |
2186 // -Xoptimize | |
2187 } else if (match_option(option, "-Xoptimize", &tail)) { | |
2188 // EVM option, ignore silently for compatibility | |
2189 // -Xprof | |
2190 } else if (match_option(option, "-Xprof", &tail)) { | |
2191 #ifndef FPROF_KERNEL | |
2192 _has_profile = true; | |
2193 #else // FPROF_KERNEL | |
2194 // do we have to exit? | |
2195 warning("Kernel VM does not support flat profiling."); | |
2196 #endif // FPROF_KERNEL | |
2197 // -Xaprof | |
2198 } else if (match_option(option, "-Xaprof", &tail)) { | |
2199 _has_alloc_profile = true; | |
2200 // -Xconcurrentio | |
2201 } else if (match_option(option, "-Xconcurrentio", &tail)) { | |
2202 FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true); | |
2203 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); | |
2204 FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1); | |
2205 FLAG_SET_CMDLINE(bool, UseTLAB, false); | |
2206 FLAG_SET_CMDLINE(uintx, NewSizeThreadIncrease, 16 * K); // 20Kb per thread added to new generation | |
2207 | |
2208 // -Xinternalversion | |
2209 } else if (match_option(option, "-Xinternalversion", &tail)) { | |
2210 jio_fprintf(defaultStream::output_stream(), "%s\n", | |
2211 VM_Version::internal_vm_info_string()); | |
2212 vm_exit(0); | |
2213 #ifndef PRODUCT | |
2214 // -Xprintflags | |
2215 } else if (match_option(option, "-Xprintflags", &tail)) { | |
2216 CommandLineFlags::printFlags(); | |
2217 vm_exit(0); | |
2218 #endif | |
2219 // -D | |
2220 } else if (match_option(option, "-D", &tail)) { | |
2221 if (!add_property(tail)) { | |
2222 return JNI_ENOMEM; | |
2223 } | |
2224 // Out of the box management support | |
2225 if (match_option(option, "-Dcom.sun.management", &tail)) { | |
2226 FLAG_SET_CMDLINE(bool, ManagementServer, true); | |
2227 } | |
2228 // -Xint | |
2229 } else if (match_option(option, "-Xint", &tail)) { | |
2230 set_mode_flags(_int); | |
2231 // -Xmixed | |
2232 } else if (match_option(option, "-Xmixed", &tail)) { | |
2233 set_mode_flags(_mixed); | |
2234 // -Xcomp | |
2235 } else if (match_option(option, "-Xcomp", &tail)) { | |
2236 // for testing the compiler; turn off all flags that inhibit compilation | |
2237 set_mode_flags(_comp); | |
2238 | |
2239 // -Xshare:dump | |
2240 } else if (match_option(option, "-Xshare:dump", &tail)) { | |
2241 #ifdef TIERED | |
2242 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); | |
2243 set_mode_flags(_int); // Prevent compilation, which creates objects | |
2244 #elif defined(COMPILER2) | |
2245 vm_exit_during_initialization( | |
2246 "Dumping a shared archive is not supported on the Server JVM.", NULL); | |
2247 #elif defined(KERNEL) | |
2248 vm_exit_during_initialization( | |
2249 "Dumping a shared archive is not supported on the Kernel JVM.", NULL); | |
2250 #else | |
2251 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); | |
2252 set_mode_flags(_int); // Prevent compilation, which creates objects | |
2253 #endif | |
2254 // -Xshare:on | |
2255 } else if (match_option(option, "-Xshare:on", &tail)) { | |
2256 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); | |
2257 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true); | |
2258 #ifdef TIERED | |
2259 FLAG_SET_CMDLINE(bool, ForceSharedSpaces, true); | |
2260 #endif // TIERED | |
2261 // -Xshare:auto | |
2262 } else if (match_option(option, "-Xshare:auto", &tail)) { | |
2263 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); | |
2264 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); | |
2265 // -Xshare:off | |
2266 } else if (match_option(option, "-Xshare:off", &tail)) { | |
2267 FLAG_SET_CMDLINE(bool, UseSharedSpaces, false); | |
2268 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); | |
2269 | |
2270 // -Xverify | |
2271 } else if (match_option(option, "-Xverify", &tail)) { | |
2272 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) { | |
2273 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true); | |
2274 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); | |
2275 } else if (strcmp(tail, ":remote") == 0) { | |
2276 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); | |
2277 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); | |
2278 } else if (strcmp(tail, ":none") == 0) { | |
2279 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); | |
2280 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false); | |
2281 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) { | |
2282 return JNI_EINVAL; | |
2283 } | |
2284 // -Xdebug | |
2285 } else if (match_option(option, "-Xdebug", &tail)) { | |
2286 // note this flag has been used, then ignore | |
2287 set_xdebug_mode(true); | |
2288 // -Xnoagent | |
2289 } else if (match_option(option, "-Xnoagent", &tail)) { | |
2290 // For compatibility with classic. HotSpot refuses to load the old style agent.dll. | |
2291 } else if (match_option(option, "-Xboundthreads", &tail)) { | |
2292 // Bind user level threads to kernel threads (Solaris only) | |
2293 FLAG_SET_CMDLINE(bool, UseBoundThreads, true); | |
2294 } else if (match_option(option, "-Xloggc:", &tail)) { | |
2295 // Redirect GC output to the file. -Xloggc:<filename> | |
2296 // ostream_init_log(), when called will use this filename | |
2297 // to initialize a fileStream. | |
2298 _gc_log_filename = strdup(tail); | |
2299 FLAG_SET_CMDLINE(bool, PrintGC, true); | |
2300 FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true); | |
2301 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); | |
2302 | |
2303 // JNI hooks | |
2304 } else if (match_option(option, "-Xcheck", &tail)) { | |
2305 if (!strcmp(tail, ":jni")) { | |
2306 CheckJNICalls = true; | |
2307 } else if (is_bad_option(option, args->ignoreUnrecognized, | |
2308 "check")) { | |
2309 return JNI_EINVAL; | |
2310 } | |
2311 } else if (match_option(option, "vfprintf", &tail)) { | |
2312 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo); | |
2313 } else if (match_option(option, "exit", &tail)) { | |
2314 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo); | |
2315 } else if (match_option(option, "abort", &tail)) { | |
2316 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo); | |
2317 // -XX:+AggressiveHeap | |
2318 } else if (match_option(option, "-XX:+AggressiveHeap", &tail)) { | |
2319 | |
2320 // This option inspects the machine and attempts to set various | |
2321 // parameters to be optimal for long-running, memory allocation | |
2322 // intensive jobs. It is intended for machines with large | |
2323 // amounts of cpu and memory. | |
2324 | |
2325 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit | |
2326 // VM, but we may not be able to represent the total physical memory | |
2327 // available (like having 8gb of memory on a box but using a 32bit VM). | |
2328 // Thus, we need to make sure we're using a julong for intermediate | |
2329 // calculations. | |
2330 julong initHeapSize; | |
2331 julong total_memory = os::physical_memory(); | |
2332 | |
2333 if (total_memory < (julong)256*M) { | |
2334 jio_fprintf(defaultStream::error_stream(), | |
2335 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n"); | |
2336 vm_exit(1); | |
2337 } | |
2338 | |
2339 // The heap size is half of available memory, or (at most) | |
2340 // all of possible memory less 160mb (leaving room for the OS | |
2341 // when using ISM). This is the maximum; because adaptive sizing | |
2342 // is turned on below, the actual space used may be smaller. | |
2343 | |
2344 initHeapSize = MIN2(total_memory / (julong)2, | |
2345 total_memory - (julong)160*M); | |
2346 | |
2347 // Make sure that if we have a lot of memory we cap the 32 bit | |
2348 // process space. The 64bit VM version of this function is a nop. | |
2349 initHeapSize = os::allocatable_physical_memory(initHeapSize); | |
2350 | |
2351 // The perm gen is separate but contiguous with the | |
2352 // object heap (and is reserved with it) so subtract it | |
2353 // from the heap size. | |
2354 if (initHeapSize > MaxPermSize) { | |
2355 initHeapSize = initHeapSize - MaxPermSize; | |
2356 } else { | |
2357 warning("AggressiveHeap and MaxPermSize values may conflict"); | |
2358 } | |
2359 | |
2360 if (FLAG_IS_DEFAULT(MaxHeapSize)) { | |
2361 FLAG_SET_CMDLINE(uintx, MaxHeapSize, initHeapSize); | |
1064 | 2362 FLAG_SET_CMDLINE(uintx, InitialHeapSize, initHeapSize); |
0 | 2363 // Currently the minimum size and the initial heap sizes are the same. |
1064 | 2364 set_min_heap_size(initHeapSize); |
0 | 2365 } |
2366 if (FLAG_IS_DEFAULT(NewSize)) { | |
2367 // Make the young generation 3/8ths of the total heap. | |
2368 FLAG_SET_CMDLINE(uintx, NewSize, | |
2369 ((julong)MaxHeapSize / (julong)8) * (julong)3); | |
2370 FLAG_SET_CMDLINE(uintx, MaxNewSize, NewSize); | |
2371 } | |
2372 | |
2373 FLAG_SET_DEFAULT(UseLargePages, true); | |
2374 | |
2375 // Increase some data structure sizes for efficiency | |
2376 FLAG_SET_CMDLINE(uintx, BaseFootPrintEstimate, MaxHeapSize); | |
2377 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); | |
2378 FLAG_SET_CMDLINE(uintx, TLABSize, 256*K); | |
2379 | |
2380 // See the OldPLABSize comment below, but replace 'after promotion' | |
2381 // with 'after copying'. YoungPLABSize is the size of the survivor | |
2382 // space per-gc-thread buffers. The default is 4kw. | |
2383 FLAG_SET_CMDLINE(uintx, YoungPLABSize, 256*K); // Note: this is in words | |
2384 | |
2385 // OldPLABSize is the size of the buffers in the old gen that | |
2386 // UseParallelGC uses to promote live data that doesn't fit in the | |
2387 // survivor spaces. At any given time, there's one for each gc thread. | |
2388 // The default size is 1kw. These buffers are rarely used, since the | |
2389 // survivor spaces are usually big enough. For specjbb, however, there | |
2390 // are occasions when there's lots of live data in the young gen | |
2391 // and we end up promoting some of it. We don't have a definite | |
2392 // explanation for why bumping OldPLABSize helps, but the theory | |
2393 // is that a bigger PLAB results in retaining something like the | |
2394 // original allocation order after promotion, which improves mutator | |
2395 // locality. A minor effect may be that larger PLABs reduce the | |
2396 // number of PLAB allocation events during gc. The value of 8kw | |
2397 // was arrived at by experimenting with specjbb. | |
2398 FLAG_SET_CMDLINE(uintx, OldPLABSize, 8*K); // Note: this is in words | |
2399 | |
2400 // CompilationPolicyChoice=0 causes the server compiler to adopt | |
2401 // a more conservative which-method-do-I-compile policy when one | |
2402 // of the counters maintained by the interpreter trips. The | |
2403 // result is reduced startup time and improved specjbb and | |
2404 // alacrity performance. Zero is the default, but we set it | |
2405 // explicitly here in case the default changes. | |
2406 // See runtime/compilationPolicy.*. | |
2407 FLAG_SET_CMDLINE(intx, CompilationPolicyChoice, 0); | |
2408 | |
2409 // Enable parallel GC and adaptive generation sizing | |
2410 FLAG_SET_CMDLINE(bool, UseParallelGC, true); | |
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2411 FLAG_SET_DEFAULT(ParallelGCThreads, |
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2412 Abstract_VM_Version::parallel_worker_threads()); |
0 | 2413 |
2414 // Encourage steady state memory management | |
2415 FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100); | |
2416 | |
2417 // This appears to improve mutator locality | |
2418 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); | |
2419 | |
2420 // Get around early Solaris scheduling bug | |
2421 // (affinity vs other jobs on system) | |
2422 // but disallow DR and offlining (5008695). | |
2423 FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true); | |
2424 | |
2425 } else if (match_option(option, "-XX:+NeverTenure", &tail)) { | |
2426 // The last option must always win. | |
2427 FLAG_SET_CMDLINE(bool, AlwaysTenure, false); | |
2428 FLAG_SET_CMDLINE(bool, NeverTenure, true); | |
2429 } else if (match_option(option, "-XX:+AlwaysTenure", &tail)) { | |
2430 // The last option must always win. | |
2431 FLAG_SET_CMDLINE(bool, NeverTenure, false); | |
2432 FLAG_SET_CMDLINE(bool, AlwaysTenure, true); | |
2433 } else if (match_option(option, "-XX:+CMSPermGenSweepingEnabled", &tail) || | |
2434 match_option(option, "-XX:-CMSPermGenSweepingEnabled", &tail)) { | |
2435 jio_fprintf(defaultStream::error_stream(), | |
2436 "Please use CMSClassUnloadingEnabled in place of " | |
2437 "CMSPermGenSweepingEnabled in the future\n"); | |
2438 } else if (match_option(option, "-XX:+UseGCTimeLimit", &tail)) { | |
2439 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, true); | |
2440 jio_fprintf(defaultStream::error_stream(), | |
2441 "Please use -XX:+UseGCOverheadLimit in place of " | |
2442 "-XX:+UseGCTimeLimit in the future\n"); | |
2443 } else if (match_option(option, "-XX:-UseGCTimeLimit", &tail)) { | |
2444 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, false); | |
2445 jio_fprintf(defaultStream::error_stream(), | |
2446 "Please use -XX:-UseGCOverheadLimit in place of " | |
2447 "-XX:-UseGCTimeLimit in the future\n"); | |
2448 // The TLE options are for compatibility with 1.3 and will be | |
2449 // removed without notice in a future release. These options | |
2450 // are not to be documented. | |
2451 } else if (match_option(option, "-XX:MaxTLERatio=", &tail)) { | |
2452 // No longer used. | |
2453 } else if (match_option(option, "-XX:+ResizeTLE", &tail)) { | |
2454 FLAG_SET_CMDLINE(bool, ResizeTLAB, true); | |
2455 } else if (match_option(option, "-XX:-ResizeTLE", &tail)) { | |
2456 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); | |
2457 } else if (match_option(option, "-XX:+PrintTLE", &tail)) { | |
2458 FLAG_SET_CMDLINE(bool, PrintTLAB, true); | |
2459 } else if (match_option(option, "-XX:-PrintTLE", &tail)) { | |
2460 FLAG_SET_CMDLINE(bool, PrintTLAB, false); | |
2461 } else if (match_option(option, "-XX:TLEFragmentationRatio=", &tail)) { | |
2462 // No longer used. | |
2463 } else if (match_option(option, "-XX:TLESize=", &tail)) { | |
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2464 julong long_tlab_size = 0; |
0 | 2465 ArgsRange errcode = parse_memory_size(tail, &long_tlab_size, 1); |
2466 if (errcode != arg_in_range) { | |
2467 jio_fprintf(defaultStream::error_stream(), | |
2468 "Invalid TLAB size: %s\n", option->optionString); | |
2469 describe_range_error(errcode); | |
2470 return JNI_EINVAL; | |
2471 } | |
2472 FLAG_SET_CMDLINE(uintx, TLABSize, long_tlab_size); | |
2473 } else if (match_option(option, "-XX:TLEThreadRatio=", &tail)) { | |
2474 // No longer used. | |
2475 } else if (match_option(option, "-XX:+UseTLE", &tail)) { | |
2476 FLAG_SET_CMDLINE(bool, UseTLAB, true); | |
2477 } else if (match_option(option, "-XX:-UseTLE", &tail)) { | |
2478 FLAG_SET_CMDLINE(bool, UseTLAB, false); | |
2479 SOLARIS_ONLY( | |
2480 } else if (match_option(option, "-XX:+UsePermISM", &tail)) { | |
2481 warning("-XX:+UsePermISM is obsolete."); | |
2482 FLAG_SET_CMDLINE(bool, UseISM, true); | |
2483 } else if (match_option(option, "-XX:-UsePermISM", &tail)) { | |
2484 FLAG_SET_CMDLINE(bool, UseISM, false); | |
2485 ) | |
2486 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr", &tail)) { | |
2487 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false); | |
2488 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true); | |
2489 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout", &tail)) { | |
2490 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false); | |
2491 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true); | |
2492 } else if (match_option(option, "-XX:+ExtendedDTraceProbes", &tail)) { | |
2493 #ifdef SOLARIS | |
2494 FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true); | |
2495 FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true); | |
2496 FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true); | |
2497 FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true); | |
2498 #else // ndef SOLARIS | |
2499 jio_fprintf(defaultStream::error_stream(), | |
2500 "ExtendedDTraceProbes flag is only applicable on Solaris\n"); | |
2501 return JNI_EINVAL; | |
2502 #endif // ndef SOLARIS | |
2503 #ifdef ASSERT | |
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2504 } else if (match_option(option, "-XX:+FullGCALot", &tail)) { |
0 | 2505 FLAG_SET_CMDLINE(bool, FullGCALot, true); |
2506 // disable scavenge before parallel mark-compact | |
2507 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); | |
2508 #endif | |
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2509 } else if (match_option(option, "-XX:CMSParPromoteBlocksToClaim=", &tail)) { |
0 | 2510 julong cms_blocks_to_claim = (julong)atol(tail); |
2511 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); | |
2512 jio_fprintf(defaultStream::error_stream(), | |
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2513 "Please use -XX:OldPLABSize in place of " |
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2514 "-XX:CMSParPromoteBlocksToClaim in the future\n"); |
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2515 } else if (match_option(option, "-XX:ParCMSPromoteBlocksToClaim=", &tail)) { |
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2516 julong cms_blocks_to_claim = (julong)atol(tail); |
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2517 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); |
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2518 jio_fprintf(defaultStream::error_stream(), |
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2519 "Please use -XX:OldPLABSize in place of " |
0 | 2520 "-XX:ParCMSPromoteBlocksToClaim in the future\n"); |
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2521 } else if (match_option(option, "-XX:ParallelGCOldGenAllocBufferSize=", &tail)) { |
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2522 julong old_plab_size = 0; |
0 | 2523 ArgsRange errcode = parse_memory_size(tail, &old_plab_size, 1); |
2524 if (errcode != arg_in_range) { | |
2525 jio_fprintf(defaultStream::error_stream(), | |
2526 "Invalid old PLAB size: %s\n", option->optionString); | |
2527 describe_range_error(errcode); | |
2528 return JNI_EINVAL; | |
2529 } | |
489
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|
2530 FLAG_SET_CMDLINE(uintx, OldPLABSize, old_plab_size); |
0 | 2531 jio_fprintf(defaultStream::error_stream(), |
2532 "Please use -XX:OldPLABSize in place of " | |
2533 "-XX:ParallelGCOldGenAllocBufferSize in the future\n"); | |
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|
2534 } else if (match_option(option, "-XX:ParallelGCToSpaceAllocBufferSize=", &tail)) { |
489
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2535 julong young_plab_size = 0; |
0 | 2536 ArgsRange errcode = parse_memory_size(tail, &young_plab_size, 1); |
2537 if (errcode != arg_in_range) { | |
2538 jio_fprintf(defaultStream::error_stream(), | |
2539 "Invalid young PLAB size: %s\n", option->optionString); | |
2540 describe_range_error(errcode); | |
2541 return JNI_EINVAL; | |
2542 } | |
489
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|
2543 FLAG_SET_CMDLINE(uintx, YoungPLABSize, young_plab_size); |
0 | 2544 jio_fprintf(defaultStream::error_stream(), |
2545 "Please use -XX:YoungPLABSize in place of " | |
2546 "-XX:ParallelGCToSpaceAllocBufferSize in the future\n"); | |
1284 | 2547 } else if (match_option(option, "-XX:CMSMarkStackSize=", &tail) || |
2548 match_option(option, "-XX:G1MarkStackSize=", &tail)) { | |
2549 julong stack_size = 0; | |
2550 ArgsRange errcode = parse_memory_size(tail, &stack_size, 1); | |
2551 if (errcode != arg_in_range) { | |
2552 jio_fprintf(defaultStream::error_stream(), | |
2553 "Invalid mark stack size: %s\n", option->optionString); | |
2554 describe_range_error(errcode); | |
2555 return JNI_EINVAL; | |
2556 } | |
2557 FLAG_SET_CMDLINE(uintx, MarkStackSize, stack_size); | |
2558 } else if (match_option(option, "-XX:CMSMarkStackSizeMax=", &tail)) { | |
2559 julong max_stack_size = 0; | |
2560 ArgsRange errcode = parse_memory_size(tail, &max_stack_size, 1); | |
2561 if (errcode != arg_in_range) { | |
2562 jio_fprintf(defaultStream::error_stream(), | |
2563 "Invalid maximum mark stack size: %s\n", | |
2564 option->optionString); | |
2565 describe_range_error(errcode); | |
2566 return JNI_EINVAL; | |
2567 } | |
2568 FLAG_SET_CMDLINE(uintx, MarkStackSizeMax, max_stack_size); | |
2569 } else if (match_option(option, "-XX:ParallelMarkingThreads=", &tail) || | |
2570 match_option(option, "-XX:ParallelCMSThreads=", &tail)) { | |
2571 uintx conc_threads = 0; | |
2572 if (!parse_uintx(tail, &conc_threads, 1)) { | |
2573 jio_fprintf(defaultStream::error_stream(), | |
2574 "Invalid concurrent threads: %s\n", option->optionString); | |
2575 return JNI_EINVAL; | |
2576 } | |
2577 FLAG_SET_CMDLINE(uintx, ConcGCThreads, conc_threads); | |
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2578 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx |
0 | 2579 // Skip -XX:Flags= since that case has already been handled |
2580 if (strncmp(tail, "Flags=", strlen("Flags=")) != 0) { | |
2581 if (!process_argument(tail, args->ignoreUnrecognized, origin)) { | |
2582 return JNI_EINVAL; | |
2583 } | |
2584 } | |
2585 // Unknown option | |
2586 } else if (is_bad_option(option, args->ignoreUnrecognized)) { | |
2587 return JNI_ERR; | |
2588 } | |
2589 } | |
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|
2590 // Change the default value for flags which have different default values |
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6554406: Change switch UseVMInterruptibleIO default to false (sol)
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2591 // when working with older JDKs. |
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2592 if (JDK_Version::current().compare_major(6) <= 0 && |
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2593 FLAG_IS_DEFAULT(UseVMInterruptibleIO)) { |
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2594 FLAG_SET_DEFAULT(UseVMInterruptibleIO, true); |
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2595 } |
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|
2596 #ifdef LINUX |
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2597 if (JDK_Version::current().compare_major(6) <= 0 && |
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2598 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) { |
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2599 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false); |
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|
2600 } |
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|
2601 #endif // LINUX |
0 | 2602 return JNI_OK; |
2603 } | |
2604 | |
2605 jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) { | |
2606 // This must be done after all -D arguments have been processed. | |
2607 scp_p->expand_endorsed(); | |
2608 | |
2609 if (scp_assembly_required || scp_p->get_endorsed() != NULL) { | |
2610 // Assemble the bootclasspath elements into the final path. | |
2611 Arguments::set_sysclasspath(scp_p->combined_path()); | |
2612 } | |
2613 | |
2614 // This must be done after all arguments have been processed. | |
2615 // java_compiler() true means set to "NONE" or empty. | |
2616 if (java_compiler() && !xdebug_mode()) { | |
2617 // For backwards compatibility, we switch to interpreted mode if | |
2618 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was | |
2619 // not specified. | |
2620 set_mode_flags(_int); | |
2621 } | |
2622 if (CompileThreshold == 0) { | |
2623 set_mode_flags(_int); | |
2624 } | |
2625 | |
2626 #ifdef TIERED | |
2627 // If we are using tiered compilation in the tiered vm then c1 will | |
2628 // do the profiling and we don't want to waste that time in the | |
2629 // interpreter. | |
2630 if (TieredCompilation) { | |
2631 ProfileInterpreter = false; | |
2632 } else { | |
2633 // Since we are running vanilla server we must adjust the compile threshold | |
2634 // unless the user has already adjusted it because the default threshold assumes | |
2635 // we will run tiered. | |
2636 | |
2637 if (FLAG_IS_DEFAULT(CompileThreshold)) { | |
2638 CompileThreshold = Tier2CompileThreshold; | |
2639 } | |
2640 } | |
2641 #endif // TIERED | |
2642 | |
2643 #ifndef COMPILER2 | |
2644 // Don't degrade server performance for footprint | |
2645 if (FLAG_IS_DEFAULT(UseLargePages) && | |
2646 MaxHeapSize < LargePageHeapSizeThreshold) { | |
2647 // No need for large granularity pages w/small heaps. | |
2648 // Note that large pages are enabled/disabled for both the | |
2649 // Java heap and the code cache. | |
2650 FLAG_SET_DEFAULT(UseLargePages, false); | |
2651 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseMPSS, false)); | |
2652 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseISM, false)); | |
2653 } | |
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2654 |
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2655 // Tiered compilation is undefined with C1. |
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
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|
2656 TieredCompilation = false; |
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|
2657 |
0 | 2658 #else |
2659 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) { | |
2660 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1); | |
2661 } | |
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2662 // Temporary disable bulk zeroing reduction with G1. See CR 6627983. |
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|
2663 if (UseG1GC) { |
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|
2664 FLAG_SET_DEFAULT(ReduceBulkZeroing, false); |
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2665 } |
0 | 2666 #endif |
2667 | |
2668 if (!check_vm_args_consistency()) { | |
2669 return JNI_ERR; | |
2670 } | |
2671 | |
2672 return JNI_OK; | |
2673 } | |
2674 | |
2675 jint Arguments::parse_java_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { | |
2676 return parse_options_environment_variable("_JAVA_OPTIONS", scp_p, | |
2677 scp_assembly_required_p); | |
2678 } | |
2679 | |
2680 jint Arguments::parse_java_tool_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { | |
2681 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", scp_p, | |
2682 scp_assembly_required_p); | |
2683 } | |
2684 | |
2685 jint Arguments::parse_options_environment_variable(const char* name, SysClassPath* scp_p, bool* scp_assembly_required_p) { | |
2686 const int N_MAX_OPTIONS = 64; | |
2687 const int OPTION_BUFFER_SIZE = 1024; | |
2688 char buffer[OPTION_BUFFER_SIZE]; | |
2689 | |
2690 // The variable will be ignored if it exceeds the length of the buffer. | |
2691 // Don't check this variable if user has special privileges | |
2692 // (e.g. unix su command). | |
2693 if (os::getenv(name, buffer, sizeof(buffer)) && | |
2694 !os::have_special_privileges()) { | |
2695 JavaVMOption options[N_MAX_OPTIONS]; // Construct option array | |
2696 jio_fprintf(defaultStream::error_stream(), | |
2697 "Picked up %s: %s\n", name, buffer); | |
2698 char* rd = buffer; // pointer to the input string (rd) | |
2699 int i; | |
2700 for (i = 0; i < N_MAX_OPTIONS;) { // repeat for all options in the input string | |
2701 while (isspace(*rd)) rd++; // skip whitespace | |
2702 if (*rd == 0) break; // we re done when the input string is read completely | |
2703 | |
2704 // The output, option string, overwrites the input string. | |
2705 // Because of quoting, the pointer to the option string (wrt) may lag the pointer to | |
2706 // input string (rd). | |
2707 char* wrt = rd; | |
2708 | |
2709 options[i++].optionString = wrt; // Fill in option | |
2710 while (*rd != 0 && !isspace(*rd)) { // unquoted strings terminate with a space or NULL | |
2711 if (*rd == '\'' || *rd == '"') { // handle a quoted string | |
2712 int quote = *rd; // matching quote to look for | |
2713 rd++; // don't copy open quote | |
2714 while (*rd != quote) { // include everything (even spaces) up until quote | |
2715 if (*rd == 0) { // string termination means unmatched string | |
2716 jio_fprintf(defaultStream::error_stream(), | |
2717 "Unmatched quote in %s\n", name); | |
2718 return JNI_ERR; | |
2719 } | |
2720 *wrt++ = *rd++; // copy to option string | |
2721 } | |
2722 rd++; // don't copy close quote | |
2723 } else { | |
2724 *wrt++ = *rd++; // copy to option string | |
2725 } | |
2726 } | |
2727 // Need to check if we're done before writing a NULL, | |
2728 // because the write could be to the byte that rd is pointing to. | |
2729 if (*rd++ == 0) { | |
2730 *wrt = 0; | |
2731 break; | |
2732 } | |
2733 *wrt = 0; // Zero terminate option | |
2734 } | |
2735 // Construct JavaVMInitArgs structure and parse as if it was part of the command line | |
2736 JavaVMInitArgs vm_args; | |
2737 vm_args.version = JNI_VERSION_1_2; | |
2738 vm_args.options = options; | |
2739 vm_args.nOptions = i; | |
564 | 2740 vm_args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions; |
0 | 2741 |
2742 if (PrintVMOptions) { | |
2743 const char* tail; | |
2744 for (int i = 0; i < vm_args.nOptions; i++) { | |
2745 const JavaVMOption *option = vm_args.options + i; | |
2746 if (match_option(option, "-XX:", &tail)) { | |
2747 logOption(tail); | |
2748 } | |
2749 } | |
2750 } | |
2751 | |
2752 return(parse_each_vm_init_arg(&vm_args, scp_p, scp_assembly_required_p, ENVIRON_VAR)); | |
2753 } | |
2754 return JNI_OK; | |
2755 } | |
2756 | |
2757 // Parse entry point called from JNI_CreateJavaVM | |
2758 | |
2759 jint Arguments::parse(const JavaVMInitArgs* args) { | |
2760 | |
2761 // Sharing support | |
2762 // Construct the path to the archive | |
2763 char jvm_path[JVM_MAXPATHLEN]; | |
2764 os::jvm_path(jvm_path, sizeof(jvm_path)); | |
2765 #ifdef TIERED | |
2766 if (strstr(jvm_path, "client") != NULL) { | |
2767 force_client_mode = true; | |
2768 } | |
2769 #endif // TIERED | |
2770 char *end = strrchr(jvm_path, *os::file_separator()); | |
2771 if (end != NULL) *end = '\0'; | |
2772 char *shared_archive_path = NEW_C_HEAP_ARRAY(char, strlen(jvm_path) + | |
2773 strlen(os::file_separator()) + 20); | |
2774 if (shared_archive_path == NULL) return JNI_ENOMEM; | |
2775 strcpy(shared_archive_path, jvm_path); | |
2776 strcat(shared_archive_path, os::file_separator()); | |
2777 strcat(shared_archive_path, "classes"); | |
2778 DEBUG_ONLY(strcat(shared_archive_path, "_g");) | |
2779 strcat(shared_archive_path, ".jsa"); | |
2780 SharedArchivePath = shared_archive_path; | |
2781 | |
2782 // Remaining part of option string | |
2783 const char* tail; | |
2784 | |
2785 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed. | |
2786 bool settings_file_specified = false; | |
564 | 2787 const char* flags_file; |
0 | 2788 int index; |
2789 for (index = 0; index < args->nOptions; index++) { | |
2790 const JavaVMOption *option = args->options + index; | |
2791 if (match_option(option, "-XX:Flags=", &tail)) { | |
564 | 2792 flags_file = tail; |
0 | 2793 settings_file_specified = true; |
2794 } | |
2795 if (match_option(option, "-XX:+PrintVMOptions", &tail)) { | |
2796 PrintVMOptions = true; | |
2797 } | |
253
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6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
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196
diff
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|
2798 if (match_option(option, "-XX:-PrintVMOptions", &tail)) { |
b0fe4deeb9fb
6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
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196
diff
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|
2799 PrintVMOptions = false; |
b0fe4deeb9fb
6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
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196
diff
changeset
|
2800 } |
564 | 2801 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions", &tail)) { |
2802 IgnoreUnrecognizedVMOptions = true; | |
2803 } | |
2804 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions", &tail)) { | |
2805 IgnoreUnrecognizedVMOptions = false; | |
2806 } | |
1150 | 2807 if (match_option(option, "-XX:+PrintFlagsInitial", &tail)) { |
2808 CommandLineFlags::printFlags(); | |
2809 vm_exit(0); | |
2810 } | |
564 | 2811 } |
2812 | |
2813 if (IgnoreUnrecognizedVMOptions) { | |
2814 // uncast const to modify the flag args->ignoreUnrecognized | |
2815 *(jboolean*)(&args->ignoreUnrecognized) = true; | |
2816 } | |
2817 | |
2818 // Parse specified settings file | |
2819 if (settings_file_specified) { | |
2820 if (!process_settings_file(flags_file, true, args->ignoreUnrecognized)) { | |
2821 return JNI_EINVAL; | |
2822 } | |
0 | 2823 } |
2824 | |
2825 // Parse default .hotspotrc settings file | |
2826 if (!settings_file_specified) { | |
2827 if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) { | |
2828 return JNI_EINVAL; | |
2829 } | |
2830 } | |
2831 | |
2832 if (PrintVMOptions) { | |
2833 for (index = 0; index < args->nOptions; index++) { | |
2834 const JavaVMOption *option = args->options + index; | |
2835 if (match_option(option, "-XX:", &tail)) { | |
2836 logOption(tail); | |
2837 } | |
2838 } | |
2839 } | |
2840 | |
2841 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS | |
2842 jint result = parse_vm_init_args(args); | |
2843 if (result != JNI_OK) { | |
2844 return result; | |
2845 } | |
2846 | |
2847 #ifndef PRODUCT | |
2848 if (TraceBytecodesAt != 0) { | |
2849 TraceBytecodes = true; | |
2850 } | |
2851 if (CountCompiledCalls) { | |
2852 if (UseCounterDecay) { | |
2853 warning("UseCounterDecay disabled because CountCalls is set"); | |
2854 UseCounterDecay = false; | |
2855 } | |
2856 } | |
2857 #endif // PRODUCT | |
2858 | |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
712
diff
changeset
|
2859 if (EnableInvokeDynamic && !EnableMethodHandles) { |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
712
diff
changeset
|
2860 if (!FLAG_IS_DEFAULT(EnableMethodHandles)) { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
2861 warning("forcing EnableMethodHandles true because EnableInvokeDynamic is true"); |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
712
diff
changeset
|
2862 } |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
712
diff
changeset
|
2863 EnableMethodHandles = true; |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
712
diff
changeset
|
2864 } |
710 | 2865 if (EnableMethodHandles && !AnonymousClasses) { |
2866 if (!FLAG_IS_DEFAULT(AnonymousClasses)) { | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
2867 warning("forcing AnonymousClasses true because EnableMethodHandles is true"); |
710 | 2868 } |
2869 AnonymousClasses = true; | |
2870 } | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
2871 if ((EnableMethodHandles || AnonymousClasses) && ScavengeRootsInCode == 0) { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
2872 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
2873 warning("forcing ScavengeRootsInCode non-zero because EnableMethodHandles or AnonymousClasses is true"); |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
2874 } |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
2875 ScavengeRootsInCode = 1; |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
2876 } |
1135
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
2877 #ifdef COMPILER2 |
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
2878 if (EnableInvokeDynamic && DoEscapeAnalysis) { |
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
2879 // TODO: We need to find rules for invokedynamic and EA. For now, |
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
2880 // simply disable EA by default. |
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
2881 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) { |
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
2882 DoEscapeAnalysis = false; |
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
2883 } |
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
2884 } |
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
2885 #endif |
710 | 2886 |
0 | 2887 if (PrintGCDetails) { |
2888 // Turn on -verbose:gc options as well | |
2889 PrintGC = true; | |
2890 } | |
2891 | |
1060 | 2892 #if defined(_LP64) && defined(COMPILER1) |
2893 UseCompressedOops = false; | |
2894 #endif | |
2895 | |
1571
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
1506
diff
changeset
|
2896 // Set object alignment values. |
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
1506
diff
changeset
|
2897 set_object_alignment(); |
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
1506
diff
changeset
|
2898 |
0 | 2899 #ifdef SERIALGC |
1064 | 2900 force_serial_gc(); |
0 | 2901 #endif // SERIALGC |
2902 #ifdef KERNEL | |
2903 no_shared_spaces(); | |
2904 #endif // KERNEL | |
2905 | |
2906 // Set flags based on ergonomics. | |
2907 set_ergonomics_flags(); | |
2908 | |
1135
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
2909 #ifdef _LP64 |
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
2910 // XXX JSR 292 currently does not support compressed oops. |
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
2911 if (EnableMethodHandles && UseCompressedOops) { |
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
2912 if (FLAG_IS_DEFAULT(UseCompressedOops) || FLAG_IS_ERGO(UseCompressedOops)) { |
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
2913 UseCompressedOops = false; |
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
2914 } |
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
2915 } |
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
2916 #endif // _LP64 |
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
2917 |
10
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
2918 // Check the GC selections again. |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
2919 if (!check_gc_consistency()) { |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
2920 return JNI_EINVAL; |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
2921 } |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
2922 |
1145
e018e6884bd8
6631166: CMS: better heuristics when combatting fragmentation
ysr
parents:
1074
diff
changeset
|
2923 #ifndef KERNEL |
1064 | 2924 if (UseConcMarkSweepGC) { |
2925 // Set flags for CMS and ParNew. Check UseConcMarkSweep first | |
2926 // to ensure that when both UseConcMarkSweepGC and UseParNewGC | |
2927 // are true, we don't call set_parnew_gc_flags() as well. | |
10
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
2928 set_cms_and_parnew_gc_flags(); |
1064 | 2929 } else { |
2930 // Set heap size based on available physical memory | |
2931 set_heap_size(); | |
2932 // Set per-collector flags | |
2933 if (UseParallelGC || UseParallelOldGC) { | |
2934 set_parallel_gc_flags(); | |
2935 } else if (UseParNewGC) { | |
2936 set_parnew_gc_flags(); | |
2937 } else if (UseG1GC) { | |
2938 set_g1_gc_flags(); | |
2939 } | |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
135
diff
changeset
|
2940 } |
1145
e018e6884bd8
6631166: CMS: better heuristics when combatting fragmentation
ysr
parents:
1074
diff
changeset
|
2941 #endif // KERNEL |
10
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
2942 |
0 | 2943 #ifdef SERIALGC |
2944 assert(verify_serial_gc_flags(), "SerialGC unset"); | |
2945 #endif // SERIALGC | |
2946 | |
2947 // Set bytecode rewriting flags | |
2948 set_bytecode_flags(); | |
2949 | |
2950 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled. | |
2951 set_aggressive_opts_flags(); | |
2952 | |
2953 #ifdef CC_INTERP | |
1131 | 2954 // Clear flags not supported by the C++ interpreter |
2955 FLAG_SET_DEFAULT(ProfileInterpreter, false); | |
0 | 2956 FLAG_SET_DEFAULT(UseBiasedLocking, false); |
1131 | 2957 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false)); |
2958 #endif // CC_INTERP | |
2959 | |
420
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
kvn
parents:
416
diff
changeset
|
2960 #ifdef COMPILER2 |
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
kvn
parents:
416
diff
changeset
|
2961 if (!UseBiasedLocking || EmitSync != 0) { |
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
kvn
parents:
416
diff
changeset
|
2962 UseOptoBiasInlining = false; |
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
kvn
parents:
416
diff
changeset
|
2963 } |
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
kvn
parents:
416
diff
changeset
|
2964 #endif |
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
kvn
parents:
416
diff
changeset
|
2965 |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1150
diff
changeset
|
2966 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1150
diff
changeset
|
2967 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output"); |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1150
diff
changeset
|
2968 DebugNonSafepoints = true; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1150
diff
changeset
|
2969 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1150
diff
changeset
|
2970 |
1188
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1161
diff
changeset
|
2971 #ifndef PRODUCT |
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1161
diff
changeset
|
2972 if (CompileTheWorld) { |
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1161
diff
changeset
|
2973 // Force NmethodSweeper to sweep whole CodeCache each time. |
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1161
diff
changeset
|
2974 if (FLAG_IS_DEFAULT(NmethodSweepFraction)) { |
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1161
diff
changeset
|
2975 NmethodSweepFraction = 1; |
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1161
diff
changeset
|
2976 } |
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1161
diff
changeset
|
2977 } |
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1161
diff
changeset
|
2978 #endif |
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1161
diff
changeset
|
2979 |
0 | 2980 if (PrintCommandLineFlags) { |
2981 CommandLineFlags::printSetFlags(); | |
2982 } | |
2983 | |
10
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
2984 if (PrintFlagsFinal) { |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
2985 CommandLineFlags::printFlags(); |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
2986 } |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
2987 |
0 | 2988 return JNI_OK; |
2989 } | |
2990 | |
2991 int Arguments::PropertyList_count(SystemProperty* pl) { | |
2992 int count = 0; | |
2993 while(pl != NULL) { | |
2994 count++; | |
2995 pl = pl->next(); | |
2996 } | |
2997 return count; | |
2998 } | |
2999 | |
3000 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) { | |
3001 assert(key != NULL, "just checking"); | |
3002 SystemProperty* prop; | |
3003 for (prop = pl; prop != NULL; prop = prop->next()) { | |
3004 if (strcmp(key, prop->key()) == 0) return prop->value(); | |
3005 } | |
3006 return NULL; | |
3007 } | |
3008 | |
3009 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) { | |
3010 int count = 0; | |
3011 const char* ret_val = NULL; | |
3012 | |
3013 while(pl != NULL) { | |
3014 if(count >= index) { | |
3015 ret_val = pl->key(); | |
3016 break; | |
3017 } | |
3018 count++; | |
3019 pl = pl->next(); | |
3020 } | |
3021 | |
3022 return ret_val; | |
3023 } | |
3024 | |
3025 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) { | |
3026 int count = 0; | |
3027 char* ret_val = NULL; | |
3028 | |
3029 while(pl != NULL) { | |
3030 if(count >= index) { | |
3031 ret_val = pl->value(); | |
3032 break; | |
3033 } | |
3034 count++; | |
3035 pl = pl->next(); | |
3036 } | |
3037 | |
3038 return ret_val; | |
3039 } | |
3040 | |
3041 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) { | |
3042 SystemProperty* p = *plist; | |
3043 if (p == NULL) { | |
3044 *plist = new_p; | |
3045 } else { | |
3046 while (p->next() != NULL) { | |
3047 p = p->next(); | |
3048 } | |
3049 p->set_next(new_p); | |
3050 } | |
3051 } | |
3052 | |
3053 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, char* v) { | |
3054 if (plist == NULL) | |
3055 return; | |
3056 | |
3057 SystemProperty* new_p = new SystemProperty(k, v, true); | |
3058 PropertyList_add(plist, new_p); | |
3059 } | |
3060 | |
3061 // This add maintains unique property key in the list. | |
691 | 3062 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, char* v, jboolean append) { |
0 | 3063 if (plist == NULL) |
3064 return; | |
3065 | |
3066 // If property key exist then update with new value. | |
3067 SystemProperty* prop; | |
3068 for (prop = *plist; prop != NULL; prop = prop->next()) { | |
3069 if (strcmp(k, prop->key()) == 0) { | |
691 | 3070 if (append) { |
3071 prop->append_value(v); | |
3072 } else { | |
3073 prop->set_value(v); | |
3074 } | |
0 | 3075 return; |
3076 } | |
3077 } | |
3078 | |
3079 PropertyList_add(plist, k, v); | |
3080 } | |
3081 | |
3082 #ifdef KERNEL | |
3083 char *Arguments::get_kernel_properties() { | |
3084 // Find properties starting with kernel and append them to string | |
3085 // We need to find out how long they are first because the URL's that they | |
3086 // might point to could get long. | |
3087 int length = 0; | |
3088 SystemProperty* prop; | |
3089 for (prop = _system_properties; prop != NULL; prop = prop->next()) { | |
3090 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { | |
3091 length += (strlen(prop->key()) + strlen(prop->value()) + 5); // "-D =" | |
3092 } | |
3093 } | |
3094 // Add one for null terminator. | |
3095 char *props = AllocateHeap(length + 1, "get_kernel_properties"); | |
3096 if (length != 0) { | |
3097 int pos = 0; | |
3098 for (prop = _system_properties; prop != NULL; prop = prop->next()) { | |
3099 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { | |
3100 jio_snprintf(&props[pos], length-pos, | |
3101 "-D%s=%s ", prop->key(), prop->value()); | |
3102 pos = strlen(props); | |
3103 } | |
3104 } | |
3105 } | |
3106 // null terminate props in case of null | |
3107 props[length] = '\0'; | |
3108 return props; | |
3109 } | |
3110 #endif // KERNEL | |
3111 | |
3112 // Copies src into buf, replacing "%%" with "%" and "%p" with pid | |
3113 // Returns true if all of the source pointed by src has been copied over to | |
3114 // the destination buffer pointed by buf. Otherwise, returns false. | |
3115 // Notes: | |
3116 // 1. If the length (buflen) of the destination buffer excluding the | |
3117 // NULL terminator character is not long enough for holding the expanded | |
3118 // pid characters, it also returns false instead of returning the partially | |
3119 // expanded one. | |
3120 // 2. The passed in "buflen" should be large enough to hold the null terminator. | |
3121 bool Arguments::copy_expand_pid(const char* src, size_t srclen, | |
3122 char* buf, size_t buflen) { | |
3123 const char* p = src; | |
3124 char* b = buf; | |
3125 const char* src_end = &src[srclen]; | |
3126 char* buf_end = &buf[buflen - 1]; | |
3127 | |
3128 while (p < src_end && b < buf_end) { | |
3129 if (*p == '%') { | |
3130 switch (*(++p)) { | |
3131 case '%': // "%%" ==> "%" | |
3132 *b++ = *p++; | |
3133 break; | |
3134 case 'p': { // "%p" ==> current process id | |
3135 // buf_end points to the character before the last character so | |
3136 // that we could write '\0' to the end of the buffer. | |
3137 size_t buf_sz = buf_end - b + 1; | |
3138 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id()); | |
3139 | |
3140 // if jio_snprintf fails or the buffer is not long enough to hold | |
3141 // the expanded pid, returns false. | |
3142 if (ret < 0 || ret >= (int)buf_sz) { | |
3143 return false; | |
3144 } else { | |
3145 b += ret; | |
3146 assert(*b == '\0', "fail in copy_expand_pid"); | |
3147 if (p == src_end && b == buf_end + 1) { | |
3148 // reach the end of the buffer. | |
3149 return true; | |
3150 } | |
3151 } | |
3152 p++; | |
3153 break; | |
3154 } | |
3155 default : | |
3156 *b++ = '%'; | |
3157 } | |
3158 } else { | |
3159 *b++ = *p++; | |
3160 } | |
3161 } | |
3162 *b = '\0'; | |
3163 return (p == src_end); // return false if not all of the source was copied | |
3164 } |