Mercurial > hg > truffle
annotate src/share/vm/runtime/arguments.cpp @ 1963:0ac62b4d6507
6999491: non-zero COOPs are used when they should not
Summary: HeapBaseMinAddress should be used only for a default heap size calculation.
Reviewed-by: iveresov, jcoomes, dholmes
author | kvn |
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date | Fri, 12 Nov 2010 09:51:43 -0800 |
parents | 2db84614f61d |
children | 4110c3e0c50d |
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 | |
54 char* Arguments::SharedArchivePath = NULL; | |
55 | |
56 AgentLibraryList Arguments::_libraryList; | |
57 AgentLibraryList Arguments::_agentList; | |
58 | |
59 abort_hook_t Arguments::_abort_hook = NULL; | |
60 exit_hook_t Arguments::_exit_hook = NULL; | |
61 vfprintf_hook_t Arguments::_vfprintf_hook = NULL; | |
62 | |
63 | |
64 SystemProperty *Arguments::_java_ext_dirs = NULL; | |
65 SystemProperty *Arguments::_java_endorsed_dirs = NULL; | |
66 SystemProperty *Arguments::_sun_boot_library_path = NULL; | |
67 SystemProperty *Arguments::_java_library_path = NULL; | |
68 SystemProperty *Arguments::_java_home = NULL; | |
69 SystemProperty *Arguments::_java_class_path = NULL; | |
70 SystemProperty *Arguments::_sun_boot_class_path = NULL; | |
71 | |
72 char* Arguments::_meta_index_path = NULL; | |
73 char* Arguments::_meta_index_dir = NULL; | |
74 | |
75 static bool force_client_mode = false; | |
76 | |
77 // Check if head of 'option' matches 'name', and sets 'tail' remaining part of option string | |
78 | |
79 static bool match_option(const JavaVMOption *option, const char* name, | |
80 const char** tail) { | |
81 int len = (int)strlen(name); | |
82 if (strncmp(option->optionString, name, len) == 0) { | |
83 *tail = option->optionString + len; | |
84 return true; | |
85 } else { | |
86 return false; | |
87 } | |
88 } | |
89 | |
90 static void logOption(const char* opt) { | |
91 if (PrintVMOptions) { | |
92 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt); | |
93 } | |
94 } | |
95 | |
96 // Process java launcher properties. | |
97 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) { | |
98 // See if sun.java.launcher or sun.java.launcher.pid is defined. | |
99 // Must do this before setting up other system properties, | |
100 // as some of them may depend on launcher type. | |
101 for (int index = 0; index < args->nOptions; index++) { | |
102 const JavaVMOption* option = args->options + index; | |
103 const char* tail; | |
104 | |
105 if (match_option(option, "-Dsun.java.launcher=", &tail)) { | |
106 process_java_launcher_argument(tail, option->extraInfo); | |
107 continue; | |
108 } | |
109 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) { | |
110 _sun_java_launcher_pid = atoi(tail); | |
111 continue; | |
112 } | |
113 } | |
114 } | |
115 | |
116 // Initialize system properties key and value. | |
117 void Arguments::init_system_properties() { | |
118 | |
119 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.version", "1.0", false)); | |
120 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name", | |
121 "Java Virtual Machine Specification", false)); | |
122 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false)); | |
123 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false)); | |
124 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true)); | |
125 | |
126 // following are JVMTI agent writeable properties. | |
127 // Properties values are set to NULL and they are | |
128 // os specific they are initialized in os::init_system_properties_values(). | |
129 _java_ext_dirs = new SystemProperty("java.ext.dirs", NULL, true); | |
130 _java_endorsed_dirs = new SystemProperty("java.endorsed.dirs", NULL, true); | |
131 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true); | |
132 _java_library_path = new SystemProperty("java.library.path", NULL, true); | |
133 _java_home = new SystemProperty("java.home", NULL, true); | |
134 _sun_boot_class_path = new SystemProperty("sun.boot.class.path", NULL, true); | |
135 | |
136 _java_class_path = new SystemProperty("java.class.path", "", true); | |
137 | |
138 // Add to System Property list. | |
139 PropertyList_add(&_system_properties, _java_ext_dirs); | |
140 PropertyList_add(&_system_properties, _java_endorsed_dirs); | |
141 PropertyList_add(&_system_properties, _sun_boot_library_path); | |
142 PropertyList_add(&_system_properties, _java_library_path); | |
143 PropertyList_add(&_system_properties, _java_home); | |
144 PropertyList_add(&_system_properties, _java_class_path); | |
145 PropertyList_add(&_system_properties, _sun_boot_class_path); | |
146 | |
147 // Set OS specific system properties values | |
148 os::init_system_properties_values(); | |
149 } | |
150 | |
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151 |
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152 // Update/Initialize System properties after JDK version number is known |
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153 void Arguments::init_version_specific_system_properties() { |
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154 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.vendor", |
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155 JDK_Version::is_gte_jdk17x_version() ? "Oracle Corporation" : "Sun Microsystems Inc.", false)); |
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156 PropertyList_add(&_system_properties, new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false)); |
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157 } |
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158 |
242 | 159 /** |
160 * Provide a slightly more user-friendly way of eliminating -XX flags. | |
161 * When a flag is eliminated, it can be added to this list in order to | |
162 * continue accepting this flag on the command-line, while issuing a warning | |
163 * and ignoring the value. Once the JDK version reaches the 'accept_until' | |
164 * limit, we flatly refuse to admit the existence of the flag. This allows | |
165 * a flag to die correctly over JDK releases using HSX. | |
166 */ | |
167 typedef struct { | |
168 const char* name; | |
169 JDK_Version obsoleted_in; // when the flag went away | |
170 JDK_Version accept_until; // which version to start denying the existence | |
171 } ObsoleteFlag; | |
0 | 172 |
242 | 173 static ObsoleteFlag obsolete_jvm_flags[] = { |
174 { "UseTrainGC", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
175 { "UseSpecialLargeObjectHandling", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
176 { "UseOversizedCarHandling", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
177 { "TraceCarAllocation", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
178 { "PrintTrainGCProcessingStats", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
179 { "LogOfCarSpaceSize", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
180 { "OversizedCarThreshold", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
181 { "MinTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
182 { "DefaultTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
183 { "MaxTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
184 { "DelayTickAdjustment", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
185 { "ProcessingToTenuringRatio", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
186 { "MinTrainLength", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
187 { "AppendRatio", JDK_Version::jdk_update(6,10), JDK_Version::jdk(7) }, | |
1064 | 188 { "DefaultMaxRAM", JDK_Version::jdk_update(6,18), JDK_Version::jdk(7) }, |
189 { "DefaultInitialRAMFraction", | |
190 JDK_Version::jdk_update(6,18), JDK_Version::jdk(7) }, | |
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191 { "UseDepthFirstScavengeOrder", |
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192 JDK_Version::jdk_update(6,22), JDK_Version::jdk(7) }, |
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193 { "HandlePromotionFailure", |
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194 JDK_Version::jdk_update(6,24), JDK_Version::jdk(8) }, |
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195 { "MaxLiveObjectEvacuationRatio", |
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196 JDK_Version::jdk_update(6,24), JDK_Version::jdk(8) }, |
242 | 197 { NULL, JDK_Version(0), JDK_Version(0) } |
198 }; | |
199 | |
200 // Returns true if the flag is obsolete and fits into the range specified | |
201 // for being ignored. In the case that the flag is ignored, the 'version' | |
202 // value is filled in with the version number when the flag became | |
203 // obsolete so that that value can be displayed to the user. | |
204 bool Arguments::is_newly_obsolete(const char *s, JDK_Version* version) { | |
0 | 205 int i = 0; |
242 | 206 assert(version != NULL, "Must provide a version buffer"); |
207 while (obsolete_jvm_flags[i].name != NULL) { | |
208 const ObsoleteFlag& flag_status = obsolete_jvm_flags[i]; | |
0 | 209 // <flag>=xxx form |
210 // [-|+]<flag> form | |
242 | 211 if ((strncmp(flag_status.name, s, strlen(flag_status.name)) == 0) || |
0 | 212 ((s[0] == '+' || s[0] == '-') && |
242 | 213 (strncmp(flag_status.name, &s[1], strlen(flag_status.name)) == 0))) { |
214 if (JDK_Version::current().compare(flag_status.accept_until) == -1) { | |
215 *version = flag_status.obsoleted_in; | |
216 return true; | |
217 } | |
0 | 218 } |
219 i++; | |
220 } | |
221 return false; | |
222 } | |
223 | |
224 // Constructs the system class path (aka boot class path) from the following | |
225 // components, in order: | |
226 // | |
227 // prefix // from -Xbootclasspath/p:... | |
228 // endorsed // the expansion of -Djava.endorsed.dirs=... | |
229 // base // from os::get_system_properties() or -Xbootclasspath= | |
230 // suffix // from -Xbootclasspath/a:... | |
231 // | |
232 // java.endorsed.dirs is a list of directories; any jar or zip files in the | |
233 // directories are added to the sysclasspath just before the base. | |
234 // | |
235 // This could be AllStatic, but it isn't needed after argument processing is | |
236 // complete. | |
237 class SysClassPath: public StackObj { | |
238 public: | |
239 SysClassPath(const char* base); | |
240 ~SysClassPath(); | |
241 | |
242 inline void set_base(const char* base); | |
243 inline void add_prefix(const char* prefix); | |
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244 inline void add_suffix_to_prefix(const char* suffix); |
0 | 245 inline void add_suffix(const char* suffix); |
246 inline void reset_path(const char* base); | |
247 | |
248 // Expand the jar/zip files in each directory listed by the java.endorsed.dirs | |
249 // property. Must be called after all command-line arguments have been | |
250 // processed (in particular, -Djava.endorsed.dirs=...) and before calling | |
251 // combined_path(). | |
252 void expand_endorsed(); | |
253 | |
254 inline const char* get_base() const { return _items[_scp_base]; } | |
255 inline const char* get_prefix() const { return _items[_scp_prefix]; } | |
256 inline const char* get_suffix() const { return _items[_scp_suffix]; } | |
257 inline const char* get_endorsed() const { return _items[_scp_endorsed]; } | |
258 | |
259 // Combine all the components into a single c-heap-allocated string; caller | |
260 // must free the string if/when no longer needed. | |
261 char* combined_path(); | |
262 | |
263 private: | |
264 // Utility routines. | |
265 static char* add_to_path(const char* path, const char* str, bool prepend); | |
266 static char* add_jars_to_path(char* path, const char* directory); | |
267 | |
268 inline void reset_item_at(int index); | |
269 | |
270 // Array indices for the items that make up the sysclasspath. All except the | |
271 // base are allocated in the C heap and freed by this class. | |
272 enum { | |
273 _scp_prefix, // from -Xbootclasspath/p:... | |
274 _scp_endorsed, // the expansion of -Djava.endorsed.dirs=... | |
275 _scp_base, // the default sysclasspath | |
276 _scp_suffix, // from -Xbootclasspath/a:... | |
277 _scp_nitems // the number of items, must be last. | |
278 }; | |
279 | |
280 const char* _items[_scp_nitems]; | |
281 DEBUG_ONLY(bool _expansion_done;) | |
282 }; | |
283 | |
284 SysClassPath::SysClassPath(const char* base) { | |
285 memset(_items, 0, sizeof(_items)); | |
286 _items[_scp_base] = base; | |
287 DEBUG_ONLY(_expansion_done = false;) | |
288 } | |
289 | |
290 SysClassPath::~SysClassPath() { | |
291 // Free everything except the base. | |
292 for (int i = 0; i < _scp_nitems; ++i) { | |
293 if (i != _scp_base) reset_item_at(i); | |
294 } | |
295 DEBUG_ONLY(_expansion_done = false;) | |
296 } | |
297 | |
298 inline void SysClassPath::set_base(const char* base) { | |
299 _items[_scp_base] = base; | |
300 } | |
301 | |
302 inline void SysClassPath::add_prefix(const char* prefix) { | |
303 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], prefix, true); | |
304 } | |
305 | |
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306 inline void SysClassPath::add_suffix_to_prefix(const char* suffix) { |
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307 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], suffix, false); |
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308 } |
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309 |
0 | 310 inline void SysClassPath::add_suffix(const char* suffix) { |
311 _items[_scp_suffix] = add_to_path(_items[_scp_suffix], suffix, false); | |
312 } | |
313 | |
314 inline void SysClassPath::reset_item_at(int index) { | |
315 assert(index < _scp_nitems && index != _scp_base, "just checking"); | |
316 if (_items[index] != NULL) { | |
317 FREE_C_HEAP_ARRAY(char, _items[index]); | |
318 _items[index] = NULL; | |
319 } | |
320 } | |
321 | |
322 inline void SysClassPath::reset_path(const char* base) { | |
323 // Clear the prefix and suffix. | |
324 reset_item_at(_scp_prefix); | |
325 reset_item_at(_scp_suffix); | |
326 set_base(base); | |
327 } | |
328 | |
329 //------------------------------------------------------------------------------ | |
330 | |
331 void SysClassPath::expand_endorsed() { | |
332 assert(_items[_scp_endorsed] == NULL, "can only be called once."); | |
333 | |
334 const char* path = Arguments::get_property("java.endorsed.dirs"); | |
335 if (path == NULL) { | |
336 path = Arguments::get_endorsed_dir(); | |
337 assert(path != NULL, "no default for java.endorsed.dirs"); | |
338 } | |
339 | |
340 char* expanded_path = NULL; | |
341 const char separator = *os::path_separator(); | |
342 const char* const end = path + strlen(path); | |
343 while (path < end) { | |
344 const char* tmp_end = strchr(path, separator); | |
345 if (tmp_end == NULL) { | |
346 expanded_path = add_jars_to_path(expanded_path, path); | |
347 path = end; | |
348 } else { | |
349 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1); | |
350 memcpy(dirpath, path, tmp_end - path); | |
351 dirpath[tmp_end - path] = '\0'; | |
352 expanded_path = add_jars_to_path(expanded_path, dirpath); | |
353 FREE_C_HEAP_ARRAY(char, dirpath); | |
354 path = tmp_end + 1; | |
355 } | |
356 } | |
357 _items[_scp_endorsed] = expanded_path; | |
358 DEBUG_ONLY(_expansion_done = true;) | |
359 } | |
360 | |
361 // Combine the bootclasspath elements, some of which may be null, into a single | |
362 // c-heap-allocated string. | |
363 char* SysClassPath::combined_path() { | |
364 assert(_items[_scp_base] != NULL, "empty default sysclasspath"); | |
365 assert(_expansion_done, "must call expand_endorsed() first."); | |
366 | |
367 size_t lengths[_scp_nitems]; | |
368 size_t total_len = 0; | |
369 | |
370 const char separator = *os::path_separator(); | |
371 | |
372 // Get the lengths. | |
373 int i; | |
374 for (i = 0; i < _scp_nitems; ++i) { | |
375 if (_items[i] != NULL) { | |
376 lengths[i] = strlen(_items[i]); | |
377 // Include space for the separator char (or a NULL for the last item). | |
378 total_len += lengths[i] + 1; | |
379 } | |
380 } | |
381 assert(total_len > 0, "empty sysclasspath not allowed"); | |
382 | |
383 // Copy the _items to a single string. | |
384 char* cp = NEW_C_HEAP_ARRAY(char, total_len); | |
385 char* cp_tmp = cp; | |
386 for (i = 0; i < _scp_nitems; ++i) { | |
387 if (_items[i] != NULL) { | |
388 memcpy(cp_tmp, _items[i], lengths[i]); | |
389 cp_tmp += lengths[i]; | |
390 *cp_tmp++ = separator; | |
391 } | |
392 } | |
393 *--cp_tmp = '\0'; // Replace the extra separator. | |
394 return cp; | |
395 } | |
396 | |
397 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null. | |
398 char* | |
399 SysClassPath::add_to_path(const char* path, const char* str, bool prepend) { | |
400 char *cp; | |
401 | |
402 assert(str != NULL, "just checking"); | |
403 if (path == NULL) { | |
404 size_t len = strlen(str) + 1; | |
405 cp = NEW_C_HEAP_ARRAY(char, len); | |
406 memcpy(cp, str, len); // copy the trailing null | |
407 } else { | |
408 const char separator = *os::path_separator(); | |
409 size_t old_len = strlen(path); | |
410 size_t str_len = strlen(str); | |
411 size_t len = old_len + str_len + 2; | |
412 | |
413 if (prepend) { | |
414 cp = NEW_C_HEAP_ARRAY(char, len); | |
415 char* cp_tmp = cp; | |
416 memcpy(cp_tmp, str, str_len); | |
417 cp_tmp += str_len; | |
418 *cp_tmp = separator; | |
419 memcpy(++cp_tmp, path, old_len + 1); // copy the trailing null | |
420 FREE_C_HEAP_ARRAY(char, path); | |
421 } else { | |
422 cp = REALLOC_C_HEAP_ARRAY(char, path, len); | |
423 char* cp_tmp = cp + old_len; | |
424 *cp_tmp = separator; | |
425 memcpy(++cp_tmp, str, str_len + 1); // copy the trailing null | |
426 } | |
427 } | |
428 return cp; | |
429 } | |
430 | |
431 // Scan the directory and append any jar or zip files found to path. | |
432 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null. | |
433 char* SysClassPath::add_jars_to_path(char* path, const char* directory) { | |
434 DIR* dir = os::opendir(directory); | |
435 if (dir == NULL) return path; | |
436 | |
437 char dir_sep[2] = { '\0', '\0' }; | |
438 size_t directory_len = strlen(directory); | |
439 const char fileSep = *os::file_separator(); | |
440 if (directory[directory_len - 1] != fileSep) dir_sep[0] = fileSep; | |
441 | |
442 /* Scan the directory for jars/zips, appending them to path. */ | |
443 struct dirent *entry; | |
444 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory)); | |
445 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL) { | |
446 const char* name = entry->d_name; | |
447 const char* ext = name + strlen(name) - 4; | |
448 bool isJarOrZip = ext > name && | |
449 (os::file_name_strcmp(ext, ".jar") == 0 || | |
450 os::file_name_strcmp(ext, ".zip") == 0); | |
451 if (isJarOrZip) { | |
452 char* jarpath = NEW_C_HEAP_ARRAY(char, directory_len + 2 + strlen(name)); | |
453 sprintf(jarpath, "%s%s%s", directory, dir_sep, name); | |
454 path = add_to_path(path, jarpath, false); | |
455 FREE_C_HEAP_ARRAY(char, jarpath); | |
456 } | |
457 } | |
458 FREE_C_HEAP_ARRAY(char, dbuf); | |
459 os::closedir(dir); | |
460 return path; | |
461 } | |
462 | |
463 // Parses a memory size specification string. | |
489
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464 static bool atomull(const char *s, julong* result) { |
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465 julong n = 0; |
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466 int args_read = sscanf(s, os::julong_format_specifier(), &n); |
0 | 467 if (args_read != 1) { |
468 return false; | |
469 } | |
470 while (*s != '\0' && isdigit(*s)) { | |
471 s++; | |
472 } | |
473 // 4705540: illegal if more characters are found after the first non-digit | |
474 if (strlen(s) > 1) { | |
475 return false; | |
476 } | |
477 switch (*s) { | |
478 case 'T': case 't': | |
479 *result = n * G * K; | |
489
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480 // Check for overflow. |
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481 if (*result/((julong)G * K) != n) return false; |
0 | 482 return true; |
483 case 'G': case 'g': | |
484 *result = n * G; | |
489
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485 if (*result/G != n) return false; |
0 | 486 return true; |
487 case 'M': case 'm': | |
488 *result = n * M; | |
489
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489 if (*result/M != n) return false; |
0 | 490 return true; |
491 case 'K': case 'k': | |
492 *result = n * K; | |
489
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493 if (*result/K != n) return false; |
0 | 494 return true; |
495 case '\0': | |
496 *result = n; | |
497 return true; | |
498 default: | |
499 return false; | |
500 } | |
501 } | |
502 | |
489
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503 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size) { |
0 | 504 if (size < min_size) return arg_too_small; |
505 // Check that size will fit in a size_t (only relevant on 32-bit) | |
489
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506 if (size > max_uintx) return arg_too_big; |
0 | 507 return arg_in_range; |
508 } | |
509 | |
510 // Describe an argument out of range error | |
511 void Arguments::describe_range_error(ArgsRange errcode) { | |
512 switch(errcode) { | |
513 case arg_too_big: | |
514 jio_fprintf(defaultStream::error_stream(), | |
515 "The specified size exceeds the maximum " | |
516 "representable size.\n"); | |
517 break; | |
518 case arg_too_small: | |
519 case arg_unreadable: | |
520 case arg_in_range: | |
521 // do nothing for now | |
522 break; | |
523 default: | |
524 ShouldNotReachHere(); | |
525 } | |
526 } | |
527 | |
528 static bool set_bool_flag(char* name, bool value, FlagValueOrigin origin) { | |
529 return CommandLineFlags::boolAtPut(name, &value, origin); | |
530 } | |
531 | |
532 static bool set_fp_numeric_flag(char* name, char* value, FlagValueOrigin origin) { | |
533 double v; | |
534 if (sscanf(value, "%lf", &v) != 1) { | |
535 return false; | |
536 } | |
537 | |
538 if (CommandLineFlags::doubleAtPut(name, &v, origin)) { | |
539 return true; | |
540 } | |
541 return false; | |
542 } | |
543 | |
544 static bool set_numeric_flag(char* name, char* value, FlagValueOrigin origin) { | |
489
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545 julong v; |
0 | 546 intx intx_v; |
547 bool is_neg = false; | |
489
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548 // Check the sign first since atomull() parses only unsigned values. |
0 | 549 if (*value == '-') { |
550 if (!CommandLineFlags::intxAt(name, &intx_v)) { | |
551 return false; | |
552 } | |
553 value++; | |
554 is_neg = true; | |
555 } | |
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556 if (!atomull(value, &v)) { |
0 | 557 return false; |
558 } | |
559 intx_v = (intx) v; | |
560 if (is_neg) { | |
561 intx_v = -intx_v; | |
562 } | |
563 if (CommandLineFlags::intxAtPut(name, &intx_v, origin)) { | |
564 return true; | |
565 } | |
566 uintx uintx_v = (uintx) v; | |
567 if (!is_neg && CommandLineFlags::uintxAtPut(name, &uintx_v, origin)) { | |
568 return true; | |
569 } | |
1064 | 570 uint64_t uint64_t_v = (uint64_t) v; |
571 if (!is_neg && CommandLineFlags::uint64_tAtPut(name, &uint64_t_v, origin)) { | |
572 return true; | |
573 } | |
0 | 574 return false; |
575 } | |
576 | |
577 static bool set_string_flag(char* name, const char* value, FlagValueOrigin origin) { | |
578 if (!CommandLineFlags::ccstrAtPut(name, &value, origin)) return false; | |
579 // Contract: CommandLineFlags always returns a pointer that needs freeing. | |
580 FREE_C_HEAP_ARRAY(char, value); | |
581 return true; | |
582 } | |
583 | |
584 static bool append_to_string_flag(char* name, const char* new_value, FlagValueOrigin origin) { | |
585 const char* old_value = ""; | |
586 if (!CommandLineFlags::ccstrAt(name, &old_value)) return false; | |
587 size_t old_len = old_value != NULL ? strlen(old_value) : 0; | |
588 size_t new_len = strlen(new_value); | |
589 const char* value; | |
590 char* free_this_too = NULL; | |
591 if (old_len == 0) { | |
592 value = new_value; | |
593 } else if (new_len == 0) { | |
594 value = old_value; | |
595 } else { | |
596 char* buf = NEW_C_HEAP_ARRAY(char, old_len + 1 + new_len + 1); | |
597 // each new setting adds another LINE to the switch: | |
598 sprintf(buf, "%s\n%s", old_value, new_value); | |
599 value = buf; | |
600 free_this_too = buf; | |
601 } | |
602 (void) CommandLineFlags::ccstrAtPut(name, &value, origin); | |
603 // CommandLineFlags always returns a pointer that needs freeing. | |
604 FREE_C_HEAP_ARRAY(char, value); | |
605 if (free_this_too != NULL) { | |
606 // CommandLineFlags made its own copy, so I must delete my own temp. buffer. | |
607 FREE_C_HEAP_ARRAY(char, free_this_too); | |
608 } | |
609 return true; | |
610 } | |
611 | |
612 bool Arguments::parse_argument(const char* arg, FlagValueOrigin origin) { | |
613 | |
614 // range of acceptable characters spelled out for portability reasons | |
615 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]" | |
616 #define BUFLEN 255 | |
617 char name[BUFLEN+1]; | |
618 char dummy; | |
619 | |
620 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { | |
621 return set_bool_flag(name, false, origin); | |
622 } | |
623 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { | |
624 return set_bool_flag(name, true, origin); | |
625 } | |
626 | |
627 char punct; | |
628 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') { | |
629 const char* value = strchr(arg, '=') + 1; | |
630 Flag* flag = Flag::find_flag(name, strlen(name)); | |
631 if (flag != NULL && flag->is_ccstr()) { | |
632 if (flag->ccstr_accumulates()) { | |
633 return append_to_string_flag(name, value, origin); | |
634 } else { | |
635 if (value[0] == '\0') { | |
636 value = NULL; | |
637 } | |
638 return set_string_flag(name, value, origin); | |
639 } | |
640 } | |
641 } | |
642 | |
643 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') { | |
644 const char* value = strchr(arg, '=') + 1; | |
645 // -XX:Foo:=xxx will reset the string flag to the given value. | |
646 if (value[0] == '\0') { | |
647 value = NULL; | |
648 } | |
649 return set_string_flag(name, value, origin); | |
650 } | |
651 | |
652 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.]" | |
653 #define SIGNED_NUMBER_RANGE "[-0123456789]" | |
654 #define NUMBER_RANGE "[0123456789]" | |
655 char value[BUFLEN + 1]; | |
656 char value2[BUFLEN + 1]; | |
657 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) { | |
658 // Looks like a floating-point number -- try again with more lenient format string | |
659 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) { | |
660 return set_fp_numeric_flag(name, value, origin); | |
661 } | |
662 } | |
663 | |
664 #define VALUE_RANGE "[-kmgtKMGT0123456789]" | |
665 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) { | |
666 return set_numeric_flag(name, value, origin); | |
667 } | |
668 | |
669 return false; | |
670 } | |
671 | |
672 void Arguments::add_string(char*** bldarray, int* count, const char* arg) { | |
673 assert(bldarray != NULL, "illegal argument"); | |
674 | |
675 if (arg == NULL) { | |
676 return; | |
677 } | |
678 | |
679 int index = *count; | |
680 | |
681 // expand the array and add arg to the last element | |
682 (*count)++; | |
683 if (*bldarray == NULL) { | |
684 *bldarray = NEW_C_HEAP_ARRAY(char*, *count); | |
685 } else { | |
686 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, *count); | |
687 } | |
688 (*bldarray)[index] = strdup(arg); | |
689 } | |
690 | |
691 void Arguments::build_jvm_args(const char* arg) { | |
692 add_string(&_jvm_args_array, &_num_jvm_args, arg); | |
693 } | |
694 | |
695 void Arguments::build_jvm_flags(const char* arg) { | |
696 add_string(&_jvm_flags_array, &_num_jvm_flags, arg); | |
697 } | |
698 | |
699 // utility function to return a string that concatenates all | |
700 // strings in a given char** array | |
701 const char* Arguments::build_resource_string(char** args, int count) { | |
702 if (args == NULL || count == 0) { | |
703 return NULL; | |
704 } | |
705 size_t length = strlen(args[0]) + 1; // add 1 for the null terminator | |
706 for (int i = 1; i < count; i++) { | |
707 length += strlen(args[i]) + 1; // add 1 for a space | |
708 } | |
709 char* s = NEW_RESOURCE_ARRAY(char, length); | |
710 strcpy(s, args[0]); | |
711 for (int j = 1; j < count; j++) { | |
712 strcat(s, " "); | |
713 strcat(s, args[j]); | |
714 } | |
715 return (const char*) s; | |
716 } | |
717 | |
718 void Arguments::print_on(outputStream* st) { | |
719 st->print_cr("VM Arguments:"); | |
720 if (num_jvm_flags() > 0) { | |
721 st->print("jvm_flags: "); print_jvm_flags_on(st); | |
722 } | |
723 if (num_jvm_args() > 0) { | |
724 st->print("jvm_args: "); print_jvm_args_on(st); | |
725 } | |
726 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>"); | |
727 st->print_cr("Launcher Type: %s", _sun_java_launcher); | |
728 } | |
729 | |
730 void Arguments::print_jvm_flags_on(outputStream* st) { | |
731 if (_num_jvm_flags > 0) { | |
732 for (int i=0; i < _num_jvm_flags; i++) { | |
733 st->print("%s ", _jvm_flags_array[i]); | |
734 } | |
735 st->print_cr(""); | |
736 } | |
737 } | |
738 | |
739 void Arguments::print_jvm_args_on(outputStream* st) { | |
740 if (_num_jvm_args > 0) { | |
741 for (int i=0; i < _num_jvm_args; i++) { | |
742 st->print("%s ", _jvm_args_array[i]); | |
743 } | |
744 st->print_cr(""); | |
745 } | |
746 } | |
747 | |
242 | 748 bool Arguments::process_argument(const char* arg, |
749 jboolean ignore_unrecognized, FlagValueOrigin origin) { | |
750 | |
751 JDK_Version since = JDK_Version(); | |
0 | 752 |
753 if (parse_argument(arg, origin)) { | |
754 // do nothing | |
242 | 755 } else if (is_newly_obsolete(arg, &since)) { |
756 enum { bufsize = 256 }; | |
757 char buffer[bufsize]; | |
758 since.to_string(buffer, bufsize); | |
0 | 759 jio_fprintf(defaultStream::error_stream(), |
242 | 760 "Warning: The flag %s has been EOL'd as of %s and will" |
761 " be ignored\n", arg, buffer); | |
0 | 762 } else { |
763 if (!ignore_unrecognized) { | |
764 jio_fprintf(defaultStream::error_stream(), | |
765 "Unrecognized VM option '%s'\n", arg); | |
766 // allow for commandline "commenting out" options like -XX:#+Verbose | |
767 if (strlen(arg) == 0 || arg[0] != '#') { | |
768 return false; | |
769 } | |
770 } | |
771 } | |
772 return true; | |
773 } | |
774 | |
775 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) { | |
776 FILE* stream = fopen(file_name, "rb"); | |
777 if (stream == NULL) { | |
778 if (should_exist) { | |
779 jio_fprintf(defaultStream::error_stream(), | |
780 "Could not open settings file %s\n", file_name); | |
781 return false; | |
782 } else { | |
783 return true; | |
784 } | |
785 } | |
786 | |
787 char token[1024]; | |
788 int pos = 0; | |
789 | |
790 bool in_white_space = true; | |
791 bool in_comment = false; | |
792 bool in_quote = false; | |
793 char quote_c = 0; | |
794 bool result = true; | |
795 | |
796 int c = getc(stream); | |
797 while(c != EOF) { | |
798 if (in_white_space) { | |
799 if (in_comment) { | |
800 if (c == '\n') in_comment = false; | |
801 } else { | |
802 if (c == '#') in_comment = true; | |
803 else if (!isspace(c)) { | |
804 in_white_space = false; | |
805 token[pos++] = c; | |
806 } | |
807 } | |
808 } else { | |
809 if (c == '\n' || (!in_quote && isspace(c))) { | |
810 // token ends at newline, or at unquoted whitespace | |
811 // this allows a way to include spaces in string-valued options | |
812 token[pos] = '\0'; | |
813 logOption(token); | |
814 result &= process_argument(token, ignore_unrecognized, CONFIG_FILE); | |
815 build_jvm_flags(token); | |
816 pos = 0; | |
817 in_white_space = true; | |
818 in_quote = false; | |
819 } else if (!in_quote && (c == '\'' || c == '"')) { | |
820 in_quote = true; | |
821 quote_c = c; | |
822 } else if (in_quote && (c == quote_c)) { | |
823 in_quote = false; | |
824 } else { | |
825 token[pos++] = c; | |
826 } | |
827 } | |
828 c = getc(stream); | |
829 } | |
830 if (pos > 0) { | |
831 token[pos] = '\0'; | |
832 result &= process_argument(token, ignore_unrecognized, CONFIG_FILE); | |
833 build_jvm_flags(token); | |
834 } | |
835 fclose(stream); | |
836 return result; | |
837 } | |
838 | |
839 //============================================================================================================= | |
840 // Parsing of properties (-D) | |
841 | |
842 const char* Arguments::get_property(const char* key) { | |
843 return PropertyList_get_value(system_properties(), key); | |
844 } | |
845 | |
846 bool Arguments::add_property(const char* prop) { | |
847 const char* eq = strchr(prop, '='); | |
848 char* key; | |
849 // ns must be static--its address may be stored in a SystemProperty object. | |
850 const static char ns[1] = {0}; | |
851 char* value = (char *)ns; | |
852 | |
853 size_t key_len = (eq == NULL) ? strlen(prop) : (eq - prop); | |
854 key = AllocateHeap(key_len + 1, "add_property"); | |
855 strncpy(key, prop, key_len); | |
856 key[key_len] = '\0'; | |
857 | |
858 if (eq != NULL) { | |
859 size_t value_len = strlen(prop) - key_len - 1; | |
860 value = AllocateHeap(value_len + 1, "add_property"); | |
861 strncpy(value, &prop[key_len + 1], value_len + 1); | |
862 } | |
863 | |
864 if (strcmp(key, "java.compiler") == 0) { | |
865 process_java_compiler_argument(value); | |
866 FreeHeap(key); | |
867 if (eq != NULL) { | |
868 FreeHeap(value); | |
869 } | |
870 return true; | |
691 | 871 } else if (strcmp(key, "sun.java.command") == 0) { |
0 | 872 _java_command = value; |
873 | |
874 // don't add this property to the properties exposed to the java application | |
875 FreeHeap(key); | |
876 return true; | |
691 | 877 } else if (strcmp(key, "sun.java.launcher.pid") == 0) { |
0 | 878 // launcher.pid property is private and is processed |
879 // in process_sun_java_launcher_properties(); | |
880 // the sun.java.launcher property is passed on to the java application | |
881 FreeHeap(key); | |
882 if (eq != NULL) { | |
883 FreeHeap(value); | |
884 } | |
885 return true; | |
691 | 886 } else if (strcmp(key, "java.vendor.url.bug") == 0) { |
0 | 887 // save it in _java_vendor_url_bug, so JVM fatal error handler can access |
888 // its value without going through the property list or making a Java call. | |
889 _java_vendor_url_bug = value; | |
691 | 890 } else if (strcmp(key, "sun.boot.library.path") == 0) { |
891 PropertyList_unique_add(&_system_properties, key, value, true); | |
892 return true; | |
0 | 893 } |
894 // Create new property and add at the end of the list | |
895 PropertyList_unique_add(&_system_properties, key, value); | |
896 return true; | |
897 } | |
898 | |
899 //=========================================================================================================== | |
900 // Setting int/mixed/comp mode flags | |
901 | |
902 void Arguments::set_mode_flags(Mode mode) { | |
903 // Set up default values for all flags. | |
904 // If you add a flag to any of the branches below, | |
905 // add a default value for it here. | |
906 set_java_compiler(false); | |
907 _mode = mode; | |
908 | |
909 // Ensure Agent_OnLoad has the correct initial values. | |
910 // This may not be the final mode; mode may change later in onload phase. | |
911 PropertyList_unique_add(&_system_properties, "java.vm.info", | |
691 | 912 (char*)Abstract_VM_Version::vm_info_string(), false); |
0 | 913 |
914 UseInterpreter = true; | |
915 UseCompiler = true; | |
916 UseLoopCounter = true; | |
917 | |
918 // Default values may be platform/compiler dependent - | |
919 // use the saved values | |
920 ClipInlining = Arguments::_ClipInlining; | |
921 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods; | |
922 UseOnStackReplacement = Arguments::_UseOnStackReplacement; | |
923 BackgroundCompilation = Arguments::_BackgroundCompilation; | |
924 | |
925 // Change from defaults based on mode | |
926 switch (mode) { | |
927 default: | |
928 ShouldNotReachHere(); | |
929 break; | |
930 case _int: | |
931 UseCompiler = false; | |
932 UseLoopCounter = false; | |
933 AlwaysCompileLoopMethods = false; | |
934 UseOnStackReplacement = false; | |
935 break; | |
936 case _mixed: | |
937 // same as default | |
938 break; | |
939 case _comp: | |
940 UseInterpreter = false; | |
941 BackgroundCompilation = false; | |
942 ClipInlining = false; | |
943 break; | |
944 } | |
945 } | |
946 | |
947 // Conflict: required to use shared spaces (-Xshare:on), but | |
948 // incompatible command line options were chosen. | |
949 | |
950 static void no_shared_spaces() { | |
951 if (RequireSharedSpaces) { | |
952 jio_fprintf(defaultStream::error_stream(), | |
953 "Class data sharing is inconsistent with other specified options.\n"); | |
954 vm_exit_during_initialization("Unable to use shared archive.", NULL); | |
955 } else { | |
956 FLAG_SET_DEFAULT(UseSharedSpaces, false); | |
957 } | |
958 } | |
959 | |
1891
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960 void Arguments::check_compressed_oops_compat() { |
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961 #ifdef _LP64 |
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962 assert(UseCompressedOops, "Precondition"); |
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963 # if defined(COMPILER1) && !defined(TIERED) |
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964 // Until c1 supports compressed oops turn them off. |
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965 FLAG_SET_DEFAULT(UseCompressedOops, false); |
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966 # else |
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967 // Is it on by default or set on ergonomically |
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968 bool is_on_by_default = FLAG_IS_DEFAULT(UseCompressedOops) || FLAG_IS_ERGO(UseCompressedOops); |
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969 |
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970 // Tiered currently doesn't work with compressed oops |
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971 if (TieredCompilation) { |
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972 if (is_on_by_default) { |
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973 FLAG_SET_DEFAULT(UseCompressedOops, false); |
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974 return; |
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975 } else { |
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976 vm_exit_during_initialization( |
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977 "Tiered compilation is not supported with compressed oops yet", NULL); |
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978 } |
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979 } |
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980 |
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981 // If dumping an archive or forcing its use, disable compressed oops if possible |
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982 if (DumpSharedSpaces || RequireSharedSpaces) { |
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983 if (is_on_by_default) { |
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984 FLAG_SET_DEFAULT(UseCompressedOops, false); |
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985 return; |
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986 } else { |
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987 vm_exit_during_initialization( |
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988 "Class Data Sharing is not supported with compressed oops yet", NULL); |
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989 } |
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990 } else if (UseSharedSpaces) { |
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991 // UseSharedSpaces is on by default. With compressed oops, we turn it off. |
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992 FLAG_SET_DEFAULT(UseSharedSpaces, false); |
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993 } |
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994 |
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995 # endif // defined(COMPILER1) && !defined(TIERED) |
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996 #endif // _LP64 |
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997 } |
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998 |
1783 | 999 void Arguments::set_tiered_flags() { |
1000 if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) { | |
1001 FLAG_SET_DEFAULT(CompilationPolicyChoice, 2); | |
1002 } | |
1003 if (CompilationPolicyChoice < 2) { | |
1004 vm_exit_during_initialization( | |
1005 "Incompatible compilation policy selected", NULL); | |
1006 } | |
1891
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1007 // Increase the code cache size - tiered compiles a lot more. |
1783 | 1008 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) { |
1009 FLAG_SET_DEFAULT(ReservedCodeCacheSize, ReservedCodeCacheSize * 2); | |
1010 } | |
1011 } | |
1012 | |
1145
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1013 #ifndef KERNEL |
0 | 1014 // If the user has chosen ParallelGCThreads > 0, we set UseParNewGC |
1015 // if it's not explictly set or unset. If the user has chosen | |
1016 // UseParNewGC and not explicitly set ParallelGCThreads we | |
1017 // set it, unless this is a single cpu machine. | |
1018 void Arguments::set_parnew_gc_flags() { | |
1064 | 1019 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC && !UseG1GC, |
342
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1020 "control point invariant"); |
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1021 assert(UseParNewGC, "Error"); |
0 | 1022 |
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1023 // Turn off AdaptiveSizePolicy by default for parnew until it is |
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1024 // complete. |
342
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1025 if (FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) { |
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1026 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); |
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1027 } |
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1028 |
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1029 if (ParallelGCThreads == 0) { |
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1030 FLAG_SET_DEFAULT(ParallelGCThreads, |
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1031 Abstract_VM_Version::parallel_worker_threads()); |
1064 | 1032 if (ParallelGCThreads == 1) { |
0 | 1033 FLAG_SET_DEFAULT(UseParNewGC, false); |
1064 | 1034 FLAG_SET_DEFAULT(ParallelGCThreads, 0); |
0 | 1035 } |
1036 } | |
1064 | 1037 if (UseParNewGC) { |
1038 // CDS doesn't work with ParNew yet | |
0 | 1039 no_shared_spaces(); |
1040 | |
695 | 1041 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 respectively, |
0 | 1042 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration |
1043 // we set them to 1024 and 1024. | |
1044 // See CR 6362902. | |
1045 if (FLAG_IS_DEFAULT(YoungPLABSize)) { | |
1046 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024); | |
1047 } | |
1048 if (FLAG_IS_DEFAULT(OldPLABSize)) { | |
1049 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024); | |
1050 } | |
1051 | |
1064 | 1052 // AlwaysTenure flag should make ParNew promote all at first collection. |
0 | 1053 // See CR 6362902. |
1054 if (AlwaysTenure) { | |
1055 FLAG_SET_CMDLINE(intx, MaxTenuringThreshold, 0); | |
1056 } | |
695 | 1057 // When using compressed oops, we use local overflow stacks, |
1058 // rather than using a global overflow list chained through | |
1059 // the klass word of the object's pre-image. | |
1060 if (UseCompressedOops && !ParGCUseLocalOverflow) { | |
1061 if (!FLAG_IS_DEFAULT(ParGCUseLocalOverflow)) { | |
1062 warning("Forcing +ParGCUseLocalOverflow: needed if using compressed references"); | |
1063 } | |
1064 FLAG_SET_DEFAULT(ParGCUseLocalOverflow, true); | |
1065 } | |
1066 assert(ParGCUseLocalOverflow || !UseCompressedOops, "Error"); | |
0 | 1067 } |
1068 } | |
1069 | |
1070 // Adjust some sizes to suit CMS and/or ParNew needs; these work well on | |
1071 // sparc/solaris for certain applications, but would gain from | |
1072 // further optimization and tuning efforts, and would almost | |
1073 // certainly gain from analysis of platform and environment. | |
1074 void Arguments::set_cms_and_parnew_gc_flags() { | |
1064 | 1075 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC, "Error"); |
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1076 assert(UseConcMarkSweepGC, "CMS is expected to be on here"); |
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1077 |
0 | 1078 // If we are using CMS, we prefer to UseParNewGC, |
1079 // unless explicitly forbidden. | |
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1080 if (FLAG_IS_DEFAULT(UseParNewGC)) { |
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1081 FLAG_SET_ERGO(bool, UseParNewGC, true); |
0 | 1082 } |
1083 | |
1084 // Turn off AdaptiveSizePolicy by default for cms until it is | |
10
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1085 // complete. |
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1086 if (FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) { |
0 | 1087 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); |
1088 } | |
1089 | |
1090 // In either case, adjust ParallelGCThreads and/or UseParNewGC | |
1091 // as needed. | |
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1092 if (UseParNewGC) { |
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1093 set_parnew_gc_flags(); |
0 | 1094 } |
1095 | |
1096 // Now make adjustments for CMS | |
1097 size_t young_gen_per_worker; | |
1098 intx new_ratio; | |
1099 size_t min_new_default; | |
1100 intx tenuring_default; | |
1101 if (CMSUseOldDefaults) { // old defaults: "old" as of 6.0 | |
1102 if FLAG_IS_DEFAULT(CMSYoungGenPerWorker) { | |
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1103 FLAG_SET_ERGO(intx, CMSYoungGenPerWorker, 4*M); |
0 | 1104 } |
1105 young_gen_per_worker = 4*M; | |
1106 new_ratio = (intx)15; | |
1107 min_new_default = 4*M; | |
1108 tenuring_default = (intx)0; | |
1109 } else { // new defaults: "new" as of 6.0 | |
1110 young_gen_per_worker = CMSYoungGenPerWorker; | |
1111 new_ratio = (intx)7; | |
1112 min_new_default = 16*M; | |
1113 tenuring_default = (intx)4; | |
1114 } | |
1115 | |
1116 // Preferred young gen size for "short" pauses | |
1117 const uintx parallel_gc_threads = | |
1118 (ParallelGCThreads == 0 ? 1 : ParallelGCThreads); | |
1119 const size_t preferred_max_new_size_unaligned = | |
1120 ScaleForWordSize(young_gen_per_worker * parallel_gc_threads); | |
1121 const size_t preferred_max_new_size = | |
1122 align_size_up(preferred_max_new_size_unaligned, os::vm_page_size()); | |
1123 | |
1124 // Unless explicitly requested otherwise, size young gen | |
1125 // for "short" pauses ~ 4M*ParallelGCThreads | |
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1126 |
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1127 // If either MaxNewSize or NewRatio is set on the command line, |
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1128 // assume the user is trying to set the size of the young gen. |
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1129 |
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1130 if (FLAG_IS_DEFAULT(MaxNewSize) && FLAG_IS_DEFAULT(NewRatio)) { |
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1131 |
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1132 // Set MaxNewSize to our calculated preferred_max_new_size unless |
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1133 // NewSize was set on the command line and it is larger than |
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1134 // preferred_max_new_size. |
0 | 1135 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line |
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1136 FLAG_SET_ERGO(uintx, MaxNewSize, MAX2(NewSize, preferred_max_new_size)); |
0 | 1137 } else { |
13
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1138 FLAG_SET_ERGO(uintx, MaxNewSize, preferred_max_new_size); |
0 | 1139 } |
1064 | 1140 if (PrintGCDetails && Verbose) { |
13
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1141 // Too early to use gclog_or_tty |
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1142 tty->print_cr("Ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize); |
886
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1143 } |
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1144 |
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1145 // Unless explicitly requested otherwise, prefer a large |
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1146 // Old to Young gen size so as to shift the collection load |
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1147 // to the old generation concurrent collector |
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1148 |
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1149 // If this is only guarded by FLAG_IS_DEFAULT(NewRatio) |
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1150 // then NewSize and OldSize may be calculated. That would |
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1151 // generally lead to some differences with ParNewGC for which |
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1152 // there was no obvious reason. Also limit to the case where |
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1153 // MaxNewSize has not been set. |
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1154 |
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1155 FLAG_SET_ERGO(intx, NewRatio, MAX2(NewRatio, new_ratio)); |
0 | 1156 |
886
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1157 // Code along this path potentially sets NewSize and OldSize |
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1158 |
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1159 // Calculate the desired minimum size of the young gen but if |
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1160 // NewSize has been set on the command line, use it here since |
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1161 // it should be the final value. |
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1162 size_t min_new; |
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1163 if (FLAG_IS_DEFAULT(NewSize)) { |
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1164 min_new = align_size_up(ScaleForWordSize(min_new_default), |
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1165 os::vm_page_size()); |
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1166 } else { |
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1167 min_new = NewSize; |
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1168 } |
1064 | 1169 size_t prev_initial_size = InitialHeapSize; |
1170 if (prev_initial_size != 0 && prev_initial_size < min_new + OldSize) { | |
1171 FLAG_SET_ERGO(uintx, InitialHeapSize, min_new + OldSize); | |
0 | 1172 // Currently minimum size and the initial heap sizes are the same. |
1064 | 1173 set_min_heap_size(InitialHeapSize); |
0 | 1174 if (PrintGCDetails && Verbose) { |
1175 warning("Initial heap size increased to " SIZE_FORMAT " M from " | |
1176 SIZE_FORMAT " M; use -XX:NewSize=... for finer control.", | |
1064 | 1177 InitialHeapSize/M, prev_initial_size/M); |
0 | 1178 } |
1179 } | |
886
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1180 |
0 | 1181 // MaxHeapSize is aligned down in collectorPolicy |
886
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1182 size_t max_heap = |
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1183 align_size_down(MaxHeapSize, |
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1184 CardTableRS::ct_max_alignment_constraint()); |
0 | 1185 |
1064 | 1186 if (PrintGCDetails && Verbose) { |
13
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1187 // Too early to use gclog_or_tty |
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1188 tty->print_cr("CMS set min_heap_size: " SIZE_FORMAT |
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1189 " initial_heap_size: " SIZE_FORMAT |
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1190 " max_heap: " SIZE_FORMAT, |
1064 | 1191 min_heap_size(), InitialHeapSize, max_heap); |
13
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1192 } |
0 | 1193 if (max_heap > min_new) { |
1194 // Unless explicitly requested otherwise, make young gen | |
1195 // at least min_new, and at most preferred_max_new_size. | |
1196 if (FLAG_IS_DEFAULT(NewSize)) { | |
13
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1197 FLAG_SET_ERGO(uintx, NewSize, MAX2(NewSize, min_new)); |
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1198 FLAG_SET_ERGO(uintx, NewSize, MIN2(preferred_max_new_size, NewSize)); |
1064 | 1199 if (PrintGCDetails && Verbose) { |
13
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1200 // Too early to use gclog_or_tty |
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1201 tty->print_cr("Ergo set NewSize: " SIZE_FORMAT, NewSize); |
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1202 } |
0 | 1203 } |
1204 // Unless explicitly requested otherwise, size old gen | |
1205 // so that it's at least 3X of NewSize to begin with; | |
1206 // later NewRatio will decide how it grows; see above. | |
1207 if (FLAG_IS_DEFAULT(OldSize)) { | |
1208 if (max_heap > NewSize) { | |
1064 | 1209 FLAG_SET_ERGO(uintx, OldSize, MIN2(3*NewSize, max_heap - NewSize)); |
1210 if (PrintGCDetails && Verbose) { | |
13
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1211 // Too early to use gclog_or_tty |
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1212 tty->print_cr("Ergo set OldSize: " SIZE_FORMAT, OldSize); |
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1213 } |
0 | 1214 } |
1215 } | |
1216 } | |
1217 } | |
1218 // Unless explicitly requested otherwise, definitely | |
1219 // promote all objects surviving "tenuring_default" scavenges. | |
1220 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) && | |
1221 FLAG_IS_DEFAULT(SurvivorRatio)) { | |
13
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1222 FLAG_SET_ERGO(intx, MaxTenuringThreshold, tenuring_default); |
0 | 1223 } |
1224 // If we decided above (or user explicitly requested) | |
1225 // `promote all' (via MaxTenuringThreshold := 0), | |
1226 // prefer minuscule survivor spaces so as not to waste | |
1227 // space for (non-existent) survivors | |
1228 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) { | |
13
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1229 FLAG_SET_ERGO(intx, SurvivorRatio, MAX2((intx)1024, SurvivorRatio)); |
0 | 1230 } |
1231 // If OldPLABSize is set and CMSParPromoteBlocksToClaim is not, | |
1232 // set CMSParPromoteBlocksToClaim equal to OldPLABSize. | |
1233 // This is done in order to make ParNew+CMS configuration to work | |
1234 // with YoungPLABSize and OldPLABSize options. | |
1235 // See CR 6362902. | |
1236 if (!FLAG_IS_DEFAULT(OldPLABSize)) { | |
1237 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) { | |
13
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1238 // OldPLABSize is not the default value but CMSParPromoteBlocksToClaim |
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1239 // is. In this situtation let CMSParPromoteBlocksToClaim follow |
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1240 // the value (either from the command line or ergonomics) of |
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1241 // OldPLABSize. Following OldPLABSize is an ergonomics decision. |
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1242 FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, OldPLABSize); |
1145
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1243 } else { |
0 | 1244 // OldPLABSize and CMSParPromoteBlocksToClaim are both set. |
1245 // CMSParPromoteBlocksToClaim is a collector-specific flag, so | |
1246 // we'll let it to take precedence. | |
1247 jio_fprintf(defaultStream::error_stream(), | |
886
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1248 "Both OldPLABSize and CMSParPromoteBlocksToClaim" |
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1249 " options are specified for the CMS collector." |
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1250 " CMSParPromoteBlocksToClaim will take precedence.\n"); |
0 | 1251 } |
1252 } | |
1145
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1253 if (!FLAG_IS_DEFAULT(ResizeOldPLAB) && !ResizeOldPLAB) { |
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1254 // OldPLAB sizing manually turned off: Use a larger default setting, |
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1255 // unless it was manually specified. This is because a too-low value |
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1256 // will slow down scavenges. |
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1257 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) { |
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1258 FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, 50); // default value before 6631166 |
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1259 } |
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|
1260 } |
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1261 // Overwrite OldPLABSize which is the variable we will internally use everywhere. |
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1262 FLAG_SET_ERGO(uintx, OldPLABSize, CMSParPromoteBlocksToClaim); |
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1263 // If either of the static initialization defaults have changed, note this |
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|
1264 // modification. |
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1265 if (!FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim) || !FLAG_IS_DEFAULT(OldPLABWeight)) { |
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|
1266 CFLS_LAB::modify_initialization(OldPLABSize, OldPLABWeight); |
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|
1267 } |
1284 | 1268 if (PrintGCDetails && Verbose) { |
1269 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk", | |
1270 MarkStackSize / K, MarkStackSizeMax / K); | |
1271 tty->print_cr("ConcGCThreads: %u", ConcGCThreads); | |
1272 } | |
0 | 1273 } |
1145
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1274 #endif // KERNEL |
0 | 1275 |
1571
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1276 void set_object_alignment() { |
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1277 // Object alignment. |
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|
1278 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2"); |
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1279 MinObjAlignmentInBytes = ObjectAlignmentInBytes; |
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1280 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small"); |
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1281 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize; |
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1282 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect"); |
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1283 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1; |
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1284 |
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1285 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes); |
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1286 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize; |
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1287 |
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1288 // Oop encoding heap max |
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1289 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes; |
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1290 |
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1291 #ifndef KERNEL |
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1292 // Set CMS global values |
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1293 CompactibleFreeListSpace::set_cms_values(); |
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1294 #endif // KERNEL |
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1295 } |
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1296 |
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1297 bool verify_object_alignment() { |
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1298 // Object alignment. |
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1299 if (!is_power_of_2(ObjectAlignmentInBytes)) { |
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1300 jio_fprintf(defaultStream::error_stream(), |
1829
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1301 "error: ObjectAlignmentInBytes=%d must be power of 2\n", |
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1302 (int)ObjectAlignmentInBytes); |
1571
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1303 return false; |
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1304 } |
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1305 if ((int)ObjectAlignmentInBytes < BytesPerLong) { |
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1306 jio_fprintf(defaultStream::error_stream(), |
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1307 "error: ObjectAlignmentInBytes=%d must be greater or equal %d\n", |
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1308 (int)ObjectAlignmentInBytes, BytesPerLong); |
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1309 return false; |
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1310 } |
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1311 // It does not make sense to have big object alignment |
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1312 // since a space lost due to alignment will be greater |
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1313 // then a saved space from compressed oops. |
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1314 if ((int)ObjectAlignmentInBytes > 256) { |
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1315 jio_fprintf(defaultStream::error_stream(), |
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1316 "error: ObjectAlignmentInBytes=%d must not be greater then 256\n", |
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1317 (int)ObjectAlignmentInBytes); |
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1318 return false; |
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1319 } |
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1320 // In case page size is very small. |
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1321 if ((int)ObjectAlignmentInBytes >= os::vm_page_size()) { |
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1322 jio_fprintf(defaultStream::error_stream(), |
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1323 "error: ObjectAlignmentInBytes=%d must be less then page size %d\n", |
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1324 (int)ObjectAlignmentInBytes, os::vm_page_size()); |
1571
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1325 return false; |
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1326 } |
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1327 return true; |
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1328 } |
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1329 |
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1330 inline uintx max_heap_for_compressed_oops() { |
1963 | 1331 // Avoid sign flip. |
1332 if (OopEncodingHeapMax < MaxPermSize + os::vm_page_size()) { | |
1333 return 0; | |
1334 } | |
1335 LP64_ONLY(return OopEncodingHeapMax - MaxPermSize - os::vm_page_size()); | |
1064 | 1336 NOT_LP64(ShouldNotReachHere(); return 0); |
135
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1337 } |
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1338 |
0 | 1339 bool Arguments::should_auto_select_low_pause_collector() { |
1340 if (UseAutoGCSelectPolicy && | |
1341 !FLAG_IS_DEFAULT(MaxGCPauseMillis) && | |
1342 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) { | |
1343 if (PrintGCDetails) { | |
1344 // Cannot use gclog_or_tty yet. | |
1345 tty->print_cr("Automatic selection of the low pause collector" | |
1346 " based on pause goal of %d (ms)", MaxGCPauseMillis); | |
1347 } | |
1348 return true; | |
1349 } | |
1350 return false; | |
1351 } | |
1352 | |
1353 void Arguments::set_ergonomics_flags() { | |
1354 // Parallel GC is not compatible with sharing. If one specifies | |
1064 | 1355 // that they want sharing explicitly, do not set ergonomics flags. |
0 | 1356 if (DumpSharedSpaces || ForceSharedSpaces) { |
1357 return; | |
1358 } | |
1359 | |
1360 if (os::is_server_class_machine() && !force_client_mode ) { | |
1361 // If no other collector is requested explicitly, | |
1362 // let the VM select the collector based on | |
1363 // machine class and automatic selection policy. | |
1364 if (!UseSerialGC && | |
1365 !UseConcMarkSweepGC && | |
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1366 !UseG1GC && |
0 | 1367 !UseParNewGC && |
1368 !DumpSharedSpaces && | |
1369 FLAG_IS_DEFAULT(UseParallelGC)) { | |
1370 if (should_auto_select_low_pause_collector()) { | |
1371 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true); | |
1372 } else { | |
1373 FLAG_SET_ERGO(bool, UseParallelGC, true); | |
1374 } | |
1375 no_shared_spaces(); | |
1376 } | |
1377 } | |
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1378 |
1010 | 1379 #ifndef ZERO |
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1380 #ifdef _LP64 |
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1381 // Check that UseCompressedOops can be set with the max heap size allocated |
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1382 // by ergonomics. |
187 | 1383 if (MaxHeapSize <= max_heap_for_compressed_oops()) { |
1783 | 1384 #if !defined(COMPILER1) || defined(TIERED) |
932 | 1385 if (FLAG_IS_DEFAULT(UseCompressedOops) && !UseG1GC) { |
1386 FLAG_SET_ERGO(bool, UseCompressedOops, true); | |
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1387 } |
1060 | 1388 #endif |
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1389 #ifdef _WIN64 |
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1390 if (UseLargePages && UseCompressedOops) { |
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1391 // Cannot allocate guard pages for implicit checks in indexed addressing |
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1392 // mode, when large pages are specified on windows. |
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1393 // This flag could be switched ON if narrow oop base address is set to 0, |
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1394 // see code in Universe::initialize_heap(). |
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1395 Universe::set_narrow_oop_use_implicit_null_checks(false); |
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1396 } |
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1397 #endif // _WIN64 |
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1398 } else { |
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1399 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) { |
344 | 1400 warning("Max heap size too large for Compressed Oops"); |
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1401 FLAG_SET_DEFAULT(UseCompressedOops, false); |
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1402 } |
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1403 } |
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1404 // Also checks that certain machines are slower with compressed oops |
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1405 // in vm_version initialization code. |
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1406 #endif // _LP64 |
1010 | 1407 #endif // !ZERO |
0 | 1408 } |
1409 | |
1410 void Arguments::set_parallel_gc_flags() { | |
342
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1411 assert(UseParallelGC || UseParallelOldGC, "Error"); |
0 | 1412 // If parallel old was requested, automatically enable parallel scavenge. |
1413 if (UseParallelOldGC && !UseParallelGC && FLAG_IS_DEFAULT(UseParallelGC)) { | |
1414 FLAG_SET_DEFAULT(UseParallelGC, true); | |
1415 } | |
1416 | |
1417 // If no heap maximum was requested explicitly, use some reasonable fraction | |
1418 // of the physical memory, up to a maximum of 1GB. | |
1419 if (UseParallelGC) { | |
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1420 FLAG_SET_ERGO(uintx, ParallelGCThreads, |
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1421 Abstract_VM_Version::parallel_worker_threads()); |
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1422 |
0 | 1423 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the |
1424 // SurvivorRatio has been set, reset their default values to SurvivorRatio + | |
1425 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger. | |
1426 // See CR 6362902 for details. | |
1427 if (!FLAG_IS_DEFAULT(SurvivorRatio)) { | |
1428 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) { | |
1429 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2); | |
1430 } | |
1431 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) { | |
1432 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2); | |
1433 } | |
1434 } | |
1435 | |
1436 if (UseParallelOldGC) { | |
1437 // Par compact uses lower default values since they are treated as | |
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1438 // minimums. These are different defaults because of the different |
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1439 // interpretation and are not ergonomically set. |
0 | 1440 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) { |
13
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1441 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1); |
0 | 1442 } |
1443 if (FLAG_IS_DEFAULT(PermMarkSweepDeadRatio)) { | |
13
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1444 FLAG_SET_DEFAULT(PermMarkSweepDeadRatio, 5); |
0 | 1445 } |
1446 } | |
1447 } | |
1448 } | |
1449 | |
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1450 void Arguments::set_g1_gc_flags() { |
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1451 assert(UseG1GC, "Error"); |
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1452 #ifdef COMPILER1 |
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1453 FastTLABRefill = false; |
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1454 #endif |
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1455 FLAG_SET_DEFAULT(ParallelGCThreads, |
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1456 Abstract_VM_Version::parallel_worker_threads()); |
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1457 if (ParallelGCThreads == 0) { |
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1458 FLAG_SET_DEFAULT(ParallelGCThreads, |
751 | 1459 Abstract_VM_Version::parallel_worker_threads()); |
342
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1460 } |
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1461 no_shared_spaces(); |
751 | 1462 |
1284 | 1463 if (FLAG_IS_DEFAULT(MarkStackSize)) { |
1311
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1464 FLAG_SET_DEFAULT(MarkStackSize, 128 * TASKQUEUE_SIZE); |
1284 | 1465 } |
1466 if (PrintGCDetails && Verbose) { | |
1467 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk", | |
1468 MarkStackSize / K, MarkStackSizeMax / K); | |
1469 tty->print_cr("ConcGCThreads: %u", ConcGCThreads); | |
1470 } | |
1356 | 1471 |
1472 if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) { | |
1473 // In G1, we want the default GC overhead goal to be higher than | |
1474 // say in PS. So we set it here to 10%. Otherwise the heap might | |
1475 // be expanded more aggressively than we would like it to. In | |
1476 // fact, even 10% seems to not be high enough in some cases | |
1477 // (especially small GC stress tests that the main thing they do | |
1478 // is allocation). We might consider increase it further. | |
1479 FLAG_SET_DEFAULT(GCTimeRatio, 9); | |
1480 } | |
342
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1481 } |
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1482 |
1064 | 1483 void Arguments::set_heap_size() { |
1484 if (!FLAG_IS_DEFAULT(DefaultMaxRAMFraction)) { | |
1485 // Deprecated flag | |
1486 FLAG_SET_CMDLINE(uintx, MaxRAMFraction, DefaultMaxRAMFraction); | |
1487 } | |
1488 | |
1489 const julong phys_mem = | |
1490 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM) | |
1491 : (julong)MaxRAM; | |
1492 | |
1493 // If the maximum heap size has not been set with -Xmx, | |
1494 // then set it as fraction of the size of physical memory, | |
1495 // respecting the maximum and minimum sizes of the heap. | |
342
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1496 if (FLAG_IS_DEFAULT(MaxHeapSize)) { |
1064 | 1497 julong reasonable_max = phys_mem / MaxRAMFraction; |
1498 | |
1499 if (phys_mem <= MaxHeapSize * MinRAMFraction) { | |
1500 // Small physical memory, so use a minimum fraction of it for the heap | |
1501 reasonable_max = phys_mem / MinRAMFraction; | |
1502 } else { | |
1503 // Not-small physical memory, so require a heap at least | |
1504 // as large as MaxHeapSize | |
1505 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize); | |
1506 } | |
1507 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) { | |
1508 // Limit the heap size to ErgoHeapSizeLimit | |
1509 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit); | |
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1510 } |
1064 | 1511 if (UseCompressedOops) { |
1512 // Limit the heap size to the maximum possible when using compressed oops | |
1963 | 1513 julong max_coop_heap = (julong)max_heap_for_compressed_oops(); |
1514 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) { | |
1515 // Heap should be above HeapBaseMinAddress to get zero based compressed oops | |
1516 // but it should be not less than default MaxHeapSize. | |
1517 max_coop_heap -= HeapBaseMinAddress; | |
1518 } | |
1519 reasonable_max = MIN2(reasonable_max, max_coop_heap); | |
1064 | 1520 } |
1521 reasonable_max = os::allocatable_physical_memory(reasonable_max); | |
1522 | |
1523 if (!FLAG_IS_DEFAULT(InitialHeapSize)) { | |
1524 // An initial heap size was specified on the command line, | |
1525 // so be sure that the maximum size is consistent. Done | |
1526 // after call to allocatable_physical_memory because that | |
1527 // method might reduce the allocation size. | |
1528 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize); | |
1529 } | |
1530 | |
342
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1531 if (PrintGCDetails && Verbose) { |
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1532 // Cannot use gclog_or_tty yet. |
1064 | 1533 tty->print_cr(" Maximum heap size " SIZE_FORMAT, reasonable_max); |
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1534 } |
1064 | 1535 FLAG_SET_ERGO(uintx, MaxHeapSize, (uintx)reasonable_max); |
1536 } | |
1537 | |
1538 // If the initial_heap_size has not been set with InitialHeapSize | |
1539 // or -Xms, then set it as fraction of the size of physical memory, | |
1540 // respecting the maximum and minimum sizes of the heap. | |
1541 if (FLAG_IS_DEFAULT(InitialHeapSize)) { | |
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1542 julong reasonable_minimum = (julong)(OldSize + NewSize); |
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1543 |
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1544 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize); |
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1545 |
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1546 reasonable_minimum = os::allocatable_physical_memory(reasonable_minimum); |
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1547 |
1064 | 1548 julong reasonable_initial = phys_mem / InitialRAMFraction; |
1549 | |
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1550 reasonable_initial = MAX2(reasonable_initial, reasonable_minimum); |
1064 | 1551 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize); |
1552 | |
1553 reasonable_initial = os::allocatable_physical_memory(reasonable_initial); | |
1554 | |
1555 if (PrintGCDetails && Verbose) { | |
1556 // Cannot use gclog_or_tty yet. | |
1557 tty->print_cr(" Initial heap size " SIZE_FORMAT, (uintx)reasonable_initial); | |
1074
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1558 tty->print_cr(" Minimum heap size " SIZE_FORMAT, (uintx)reasonable_minimum); |
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1559 } |
1064 | 1560 FLAG_SET_ERGO(uintx, InitialHeapSize, (uintx)reasonable_initial); |
1074
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1561 set_min_heap_size((uintx)reasonable_minimum); |
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1562 } |
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1563 } |
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1564 |
0 | 1565 // This must be called after ergonomics because we want bytecode rewriting |
1566 // if the server compiler is used, or if UseSharedSpaces is disabled. | |
1567 void Arguments::set_bytecode_flags() { | |
1568 // Better not attempt to store into a read-only space. | |
1569 if (UseSharedSpaces) { | |
1570 FLAG_SET_DEFAULT(RewriteBytecodes, false); | |
1571 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); | |
1572 } | |
1573 | |
1574 if (!RewriteBytecodes) { | |
1575 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); | |
1576 } | |
1577 } | |
1578 | |
1579 // Aggressive optimization flags -XX:+AggressiveOpts | |
1580 void Arguments::set_aggressive_opts_flags() { | |
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1581 #ifdef COMPILER2 |
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1582 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) { |
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1583 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
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0
diff
changeset
|
1584 FLAG_SET_DEFAULT(EliminateAutoBox, true); |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
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parents:
0
diff
changeset
|
1585 } |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1586 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) { |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1587 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000); |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1588 } |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1589 |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1590 // Feed the cache size setting into the JDK |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1591 char buffer[1024]; |
513
2328d1d3f8cf
6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
xlu
parents:
489
diff
changeset
|
1592 sprintf(buffer, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax); |
17
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
never
parents:
0
diff
changeset
|
1593 add_property(buffer); |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
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parents:
0
diff
changeset
|
1594 } |
65 | 1595 if (AggressiveOpts && FLAG_IS_DEFAULT(DoEscapeAnalysis)) { |
1596 FLAG_SET_DEFAULT(DoEscapeAnalysis, true); | |
1597 } | |
416
b6cfd754403d
6649622: HotSpot Biased locking needs tuning on latest CPUs
never
parents:
363
diff
changeset
|
1598 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) { |
b6cfd754403d
6649622: HotSpot Biased locking needs tuning on latest CPUs
never
parents:
363
diff
changeset
|
1599 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500); |
b6cfd754403d
6649622: HotSpot Biased locking needs tuning on latest CPUs
never
parents:
363
diff
changeset
|
1600 } |
1622 | 1601 if (AggressiveOpts && FLAG_IS_DEFAULT(OptimizeStringConcat)) { |
1602 FLAG_SET_DEFAULT(OptimizeStringConcat, true); | |
1603 } | |
1763 | 1604 if (AggressiveOpts && FLAG_IS_DEFAULT(OptimizeFill)) { |
1605 FLAG_SET_DEFAULT(OptimizeFill, true); | |
1606 } | |
17
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
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parents:
0
diff
changeset
|
1607 #endif |
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
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0
diff
changeset
|
1608 |
0 | 1609 if (AggressiveOpts) { |
61 | 1610 // Sample flag setting code |
1611 // if (FLAG_IS_DEFAULT(EliminateZeroing)) { | |
1612 // FLAG_SET_DEFAULT(EliminateZeroing, true); | |
1613 // } | |
0 | 1614 } |
1615 } | |
1616 | |
1617 //=========================================================================================================== | |
1618 // Parsing of java.compiler property | |
1619 | |
1620 void Arguments::process_java_compiler_argument(char* arg) { | |
1621 // For backwards compatibility, Djava.compiler=NONE or "" | |
1622 // causes us to switch to -Xint mode UNLESS -Xdebug | |
1623 // is also specified. | |
1624 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) { | |
1625 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen. | |
1626 } | |
1627 } | |
1628 | |
1629 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) { | |
1630 _sun_java_launcher = strdup(launcher); | |
1631 } | |
1632 | |
1633 bool Arguments::created_by_java_launcher() { | |
1634 assert(_sun_java_launcher != NULL, "property must have value"); | |
1635 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0; | |
1636 } | |
1637 | |
1638 //=========================================================================================================== | |
1639 // Parsing of main arguments | |
1640 | |
1244
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1641 bool Arguments::verify_interval(uintx val, uintx min, |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1642 uintx max, const char* name) { |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1643 // Returns true iff value is in the inclusive interval [min..max] |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1644 // false, otherwise. |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1645 if (val >= min && val <= max) { |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1646 return true; |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1647 } |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1648 jio_fprintf(defaultStream::error_stream(), |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1649 "%s of " UINTX_FORMAT " is invalid; must be between " UINTX_FORMAT |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1650 " and " UINTX_FORMAT "\n", |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1651 name, val, min, max); |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1652 return false; |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1653 } |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1654 |
1744
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1655 bool Arguments::verify_min_value(intx val, intx min, const char* name) { |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1656 // Returns true if given value is greater than specified min threshold |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1657 // false, otherwise. |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1658 if (val >= min ) { |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1659 return true; |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1660 } |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1661 jio_fprintf(defaultStream::error_stream(), |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1662 "%s of " INTX_FORMAT " is invalid; must be greater than " INTX_FORMAT "\n", |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1663 name, val, min); |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1664 return false; |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1665 } |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1666 |
0 | 1667 bool Arguments::verify_percentage(uintx value, const char* name) { |
1668 if (value <= 100) { | |
1669 return true; | |
1670 } | |
1671 jio_fprintf(defaultStream::error_stream(), | |
1672 "%s of " UINTX_FORMAT " is invalid; must be between 0 and 100\n", | |
1673 name, value); | |
1674 return false; | |
1675 } | |
1676 | |
1064 | 1677 static void force_serial_gc() { |
0 | 1678 FLAG_SET_DEFAULT(UseSerialGC, true); |
1679 FLAG_SET_DEFAULT(UseParNewGC, false); | |
1680 FLAG_SET_DEFAULT(UseConcMarkSweepGC, false); | |
945
68ef3fdcdb76
6872136: CMS: confusing message may be printed when a collector is switched off implicitly
ysr
parents:
932
diff
changeset
|
1681 FLAG_SET_DEFAULT(CMSIncrementalMode, false); // special CMS suboption |
0 | 1682 FLAG_SET_DEFAULT(UseParallelGC, false); |
1683 FLAG_SET_DEFAULT(UseParallelOldGC, false); | |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
135
diff
changeset
|
1684 FLAG_SET_DEFAULT(UseG1GC, false); |
0 | 1685 } |
1686 | |
1687 static bool verify_serial_gc_flags() { | |
1688 return (UseSerialGC && | |
945
68ef3fdcdb76
6872136: CMS: confusing message may be printed when a collector is switched off implicitly
ysr
parents:
932
diff
changeset
|
1689 !(UseParNewGC || (UseConcMarkSweepGC || CMSIncrementalMode) || UseG1GC || |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
135
diff
changeset
|
1690 UseParallelGC || UseParallelOldGC)); |
0 | 1691 } |
1692 | |
10
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1693 // Check consistency of GC selection |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1694 bool Arguments::check_gc_consistency() { |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1695 bool status = true; |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1696 // Ensure that the user has not selected conflicting sets |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1697 // of collectors. [Note: this check is merely a user convenience; |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1698 // collectors over-ride each other so that only a non-conflicting |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1699 // set is selected; however what the user gets is not what they |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1700 // may have expected from the combination they asked for. It's |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1701 // better to reduce user confusion by not allowing them to |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1702 // select conflicting combinations. |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1703 uint i = 0; |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1704 if (UseSerialGC) i++; |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1705 if (UseConcMarkSweepGC || UseParNewGC) i++; |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1706 if (UseParallelGC || UseParallelOldGC) i++; |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
751
diff
changeset
|
1707 if (UseG1GC) i++; |
10
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1708 if (i > 1) { |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1709 jio_fprintf(defaultStream::error_stream(), |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1710 "Conflicting collector combinations in option list; " |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1711 "please refer to the release notes for the combinations " |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1712 "allowed\n"); |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1713 status = false; |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1714 } |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1715 |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1716 return status; |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1717 } |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1718 |
1744
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1719 // Check stack pages settings |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1720 bool Arguments::check_stack_pages() |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1721 { |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1722 bool status = true; |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1723 status = status && verify_min_value(StackYellowPages, 1, "StackYellowPages"); |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1724 status = status && verify_min_value(StackRedPages, 1, "StackRedPages"); |
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1864
diff
changeset
|
1725 // greater stack shadow pages can't generate instruction to bang stack |
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1864
diff
changeset
|
1726 status = status && verify_interval(StackShadowPages, 1, 50, "StackShadowPages"); |
1744
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1727 return status; |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1728 } |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1729 |
0 | 1730 // Check the consistency of vm_init_args |
1731 bool Arguments::check_vm_args_consistency() { | |
1732 // Method for adding checks for flag consistency. | |
1733 // The intent is to warn the user of all possible conflicts, | |
1734 // before returning an error. | |
1735 // Note: Needs platform-dependent factoring. | |
1736 bool status = true; | |
1737 | |
1738 #if ( (defined(COMPILER2) && defined(SPARC))) | |
1739 // NOTE: The call to VM_Version_init depends on the fact that VM_Version_init | |
1740 // on sparc doesn't require generation of a stub as is the case on, e.g., | |
1741 // x86. Normally, VM_Version_init must be called from init_globals in | |
1742 // init.cpp, which is called by the initial java thread *after* arguments | |
1743 // have been parsed. VM_Version_init gets called twice on sparc. | |
1744 extern void VM_Version_init(); | |
1745 VM_Version_init(); | |
1746 if (!VM_Version::has_v9()) { | |
1747 jio_fprintf(defaultStream::error_stream(), | |
1748 "V8 Machine detected, Server requires V9\n"); | |
1749 status = false; | |
1750 } | |
1751 #endif /* COMPILER2 && SPARC */ | |
1752 | |
1753 // Allow both -XX:-UseStackBanging and -XX:-UseBoundThreads in non-product | |
1754 // builds so the cost of stack banging can be measured. | |
1755 #if (defined(PRODUCT) && defined(SOLARIS)) | |
1756 if (!UseBoundThreads && !UseStackBanging) { | |
1757 jio_fprintf(defaultStream::error_stream(), | |
1758 "-UseStackBanging conflicts with -UseBoundThreads\n"); | |
1759 | |
1760 status = false; | |
1761 } | |
1762 #endif | |
1763 | |
1764 if (TLABRefillWasteFraction == 0) { | |
1765 jio_fprintf(defaultStream::error_stream(), | |
1766 "TLABRefillWasteFraction should be a denominator, " | |
1767 "not " SIZE_FORMAT "\n", | |
1768 TLABRefillWasteFraction); | |
1769 status = false; | |
1770 } | |
1771 | |
10
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1772 status = status && verify_percentage(AdaptiveSizePolicyWeight, |
0 | 1773 "AdaptiveSizePolicyWeight"); |
10
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1774 status = status && verify_percentage(AdaptivePermSizeWeight, "AdaptivePermSizeWeight"); |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1775 status = status && verify_percentage(ThresholdTolerance, "ThresholdTolerance"); |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1776 status = status && verify_percentage(MinHeapFreeRatio, "MinHeapFreeRatio"); |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1777 status = status && verify_percentage(MaxHeapFreeRatio, "MaxHeapFreeRatio"); |
0 | 1778 |
1779 if (MinHeapFreeRatio > MaxHeapFreeRatio) { | |
1780 jio_fprintf(defaultStream::error_stream(), | |
1781 "MinHeapFreeRatio (" UINTX_FORMAT ") must be less than or " | |
1782 "equal to MaxHeapFreeRatio (" UINTX_FORMAT ")\n", | |
1783 MinHeapFreeRatio, MaxHeapFreeRatio); | |
1784 status = false; | |
1785 } | |
1786 // Keeping the heap 100% free is hard ;-) so limit it to 99%. | |
1787 MinHeapFreeRatio = MIN2(MinHeapFreeRatio, (uintx) 99); | |
1788 | |
1789 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) { | |
1790 MarkSweepAlwaysCompactCount = 1; // Move objects every gc. | |
1791 } | |
1792 | |
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1793 if (UseParallelOldGC && ParallelOldGCSplitALot) { |
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1794 // Settings to encourage splitting. |
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1795 if (!FLAG_IS_CMDLINE(NewRatio)) { |
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1796 FLAG_SET_CMDLINE(intx, NewRatio, 2); |
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1797 } |
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1798 if (!FLAG_IS_CMDLINE(ScavengeBeforeFullGC)) { |
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1799 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); |
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1800 } |
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1801 } |
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1802 |
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1803 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); |
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1804 status = status && verify_percentage(GCTimeLimit, "GCTimeLimit"); |
0 | 1805 if (GCTimeLimit == 100) { |
1806 // Turn off gc-overhead-limit-exceeded checks | |
1807 FLAG_SET_DEFAULT(UseGCOverheadLimit, false); | |
1808 } | |
1809 | |
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1810 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); |
0 | 1811 |
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1812 // Check whether user-specified sharing option conflicts with GC or page size. |
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1813 // Both sharing and large pages are enabled by default on some platforms; |
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1814 // large pages override sharing only if explicitly set on the command line. |
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1815 const bool cannot_share = UseConcMarkSweepGC || CMSIncrementalMode || |
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1816 UseG1GC || UseParNewGC || UseParallelGC || UseParallelOldGC || |
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1817 UseLargePages && FLAG_IS_CMDLINE(UseLargePages); |
0 | 1818 if (cannot_share) { |
1819 // Either force sharing on by forcing the other options off, or | |
1820 // force sharing off. | |
1821 if (DumpSharedSpaces || ForceSharedSpaces) { | |
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1822 jio_fprintf(defaultStream::error_stream(), |
1626
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1823 "Using Serial GC and default page size because of %s\n", |
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1824 ForceSharedSpaces ? "-Xshare:on" : "-Xshare:dump"); |
1064 | 1825 force_serial_gc(); |
1626
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1826 FLAG_SET_DEFAULT(UseLargePages, false); |
0 | 1827 } else { |
1064 | 1828 if (UseSharedSpaces && Verbose) { |
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1829 jio_fprintf(defaultStream::error_stream(), |
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1830 "Turning off use of shared archive because of " |
1064 | 1831 "choice of garbage collector or large pages\n"); |
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1832 } |
0 | 1833 no_shared_spaces(); |
1834 } | |
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1835 } else if (UseLargePages && (UseSharedSpaces || DumpSharedSpaces)) { |
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1836 FLAG_SET_DEFAULT(UseLargePages, false); |
0 | 1837 } |
1838 | |
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1839 status = status && check_gc_consistency(); |
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1840 status = status && check_stack_pages(); |
0 | 1841 |
1842 if (_has_alloc_profile) { | |
1843 if (UseParallelGC || UseParallelOldGC) { | |
1844 jio_fprintf(defaultStream::error_stream(), | |
1845 "error: invalid argument combination.\n" | |
1846 "Allocation profiling (-Xaprof) cannot be used together with " | |
1847 "Parallel GC (-XX:+UseParallelGC or -XX:+UseParallelOldGC).\n"); | |
1848 status = false; | |
1849 } | |
1850 if (UseConcMarkSweepGC) { | |
1851 jio_fprintf(defaultStream::error_stream(), | |
1852 "error: invalid argument combination.\n" | |
1853 "Allocation profiling (-Xaprof) cannot be used together with " | |
1854 "the CMS collector (-XX:+UseConcMarkSweepGC).\n"); | |
1855 status = false; | |
1856 } | |
1857 } | |
1858 | |
1859 if (CMSIncrementalMode) { | |
1860 if (!UseConcMarkSweepGC) { | |
1861 jio_fprintf(defaultStream::error_stream(), | |
1862 "error: invalid argument combination.\n" | |
1863 "The CMS collector (-XX:+UseConcMarkSweepGC) must be " | |
1864 "selected in order\nto use CMSIncrementalMode.\n"); | |
1865 status = false; | |
1866 } else { | |
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1867 status = status && verify_percentage(CMSIncrementalDutyCycle, |
0 | 1868 "CMSIncrementalDutyCycle"); |
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1869 status = status && verify_percentage(CMSIncrementalDutyCycleMin, |
0 | 1870 "CMSIncrementalDutyCycleMin"); |
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1871 status = status && verify_percentage(CMSIncrementalSafetyFactor, |
0 | 1872 "CMSIncrementalSafetyFactor"); |
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1873 status = status && verify_percentage(CMSIncrementalOffset, |
0 | 1874 "CMSIncrementalOffset"); |
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1875 status = status && verify_percentage(CMSExpAvgFactor, |
0 | 1876 "CMSExpAvgFactor"); |
1877 // If it was not set on the command line, set | |
1878 // CMSInitiatingOccupancyFraction to 1 so icms can initiate cycles early. | |
1879 if (CMSInitiatingOccupancyFraction < 0) { | |
1880 FLAG_SET_DEFAULT(CMSInitiatingOccupancyFraction, 1); | |
1881 } | |
1882 } | |
1883 } | |
1884 | |
1885 // CMS space iteration, which FLSVerifyAllHeapreferences entails, | |
1886 // insists that we hold the requisite locks so that the iteration is | |
1887 // MT-safe. For the verification at start-up and shut-down, we don't | |
1888 // yet have a good way of acquiring and releasing these locks, | |
1889 // which are not visible at the CollectedHeap level. We want to | |
1890 // be able to acquire these locks and then do the iteration rather | |
1891 // than just disable the lock verification. This will be fixed under | |
1892 // bug 4788986. | |
1893 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) { | |
1894 if (VerifyGCStartAt == 0) { | |
1895 warning("Heap verification at start-up disabled " | |
1896 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); | |
1897 VerifyGCStartAt = 1; // Disable verification at start-up | |
1898 } | |
1899 if (VerifyBeforeExit) { | |
1900 warning("Heap verification at shutdown disabled " | |
1901 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); | |
1902 VerifyBeforeExit = false; // Disable verification at shutdown | |
1903 } | |
1904 } | |
1905 | |
1906 // Note: only executed in non-PRODUCT mode | |
1907 if (!UseAsyncConcMarkSweepGC && | |
1908 (ExplicitGCInvokesConcurrent || | |
1909 ExplicitGCInvokesConcurrentAndUnloadsClasses)) { | |
1910 jio_fprintf(defaultStream::error_stream(), | |
1911 "error: +ExplictGCInvokesConcurrent[AndUnloadsClasses] conflicts" | |
1912 " with -UseAsyncConcMarkSweepGC"); | |
1913 status = false; | |
1914 } | |
1915 | |
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1916 if (UseG1GC) { |
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1917 status = status && verify_percentage(InitiatingHeapOccupancyPercent, |
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1918 "InitiatingHeapOccupancyPercent"); |
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1919 } |
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1920 |
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1921 status = status && verify_interval(RefDiscoveryPolicy, |
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1922 ReferenceProcessor::DiscoveryPolicyMin, |
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1923 ReferenceProcessor::DiscoveryPolicyMax, |
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1924 "RefDiscoveryPolicy"); |
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1925 |
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1926 // Limit the lower bound of this flag to 1 as it is used in a division |
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1927 // expression. |
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1928 status = status && verify_interval(TLABWasteTargetPercent, |
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1929 1, 100, "TLABWasteTargetPercent"); |
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1930 |
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1931 status = status && verify_object_alignment(); |
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1932 |
0 | 1933 return status; |
1934 } | |
1935 | |
1936 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore, | |
1937 const char* option_type) { | |
1938 if (ignore) return false; | |
1939 | |
1940 const char* spacer = " "; | |
1941 if (option_type == NULL) { | |
1942 option_type = ++spacer; // Set both to the empty string. | |
1943 } | |
1944 | |
1945 if (os::obsolete_option(option)) { | |
1946 jio_fprintf(defaultStream::error_stream(), | |
1947 "Obsolete %s%soption: %s\n", option_type, spacer, | |
1948 option->optionString); | |
1949 return false; | |
1950 } else { | |
1951 jio_fprintf(defaultStream::error_stream(), | |
1952 "Unrecognized %s%soption: %s\n", option_type, spacer, | |
1953 option->optionString); | |
1954 return true; | |
1955 } | |
1956 } | |
1957 | |
1958 static const char* user_assertion_options[] = { | |
1959 "-da", "-ea", "-disableassertions", "-enableassertions", 0 | |
1960 }; | |
1961 | |
1962 static const char* system_assertion_options[] = { | |
1963 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0 | |
1964 }; | |
1965 | |
1966 // Return true if any of the strings in null-terminated array 'names' matches. | |
1967 // If tail_allowed is true, then the tail must begin with a colon; otherwise, | |
1968 // the option must match exactly. | |
1969 static bool match_option(const JavaVMOption* option, const char** names, const char** tail, | |
1970 bool tail_allowed) { | |
1971 for (/* empty */; *names != NULL; ++names) { | |
1972 if (match_option(option, *names, tail)) { | |
1973 if (**tail == '\0' || tail_allowed && **tail == ':') { | |
1974 return true; | |
1975 } | |
1976 } | |
1977 } | |
1978 return false; | |
1979 } | |
1980 | |
1284 | 1981 bool Arguments::parse_uintx(const char* value, |
1982 uintx* uintx_arg, | |
1983 uintx min_size) { | |
1984 | |
1985 // Check the sign first since atomull() parses only unsigned values. | |
1986 bool value_is_positive = !(*value == '-'); | |
1987 | |
1988 if (value_is_positive) { | |
1989 julong n; | |
1990 bool good_return = atomull(value, &n); | |
1991 if (good_return) { | |
1992 bool above_minimum = n >= min_size; | |
1993 bool value_is_too_large = n > max_uintx; | |
1994 | |
1995 if (above_minimum && !value_is_too_large) { | |
1996 *uintx_arg = n; | |
1997 return true; | |
1998 } | |
1999 } | |
2000 } | |
2001 return false; | |
2002 } | |
2003 | |
0 | 2004 Arguments::ArgsRange Arguments::parse_memory_size(const char* s, |
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2005 julong* long_arg, |
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2006 julong min_size) { |
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2007 if (!atomull(s, long_arg)) return arg_unreadable; |
0 | 2008 return check_memory_size(*long_arg, min_size); |
2009 } | |
2010 | |
2011 // Parse JavaVMInitArgs structure | |
2012 | |
2013 jint Arguments::parse_vm_init_args(const JavaVMInitArgs* args) { | |
2014 // For components of the system classpath. | |
2015 SysClassPath scp(Arguments::get_sysclasspath()); | |
2016 bool scp_assembly_required = false; | |
2017 | |
2018 // Save default settings for some mode flags | |
2019 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; | |
2020 Arguments::_UseOnStackReplacement = UseOnStackReplacement; | |
2021 Arguments::_ClipInlining = ClipInlining; | |
2022 Arguments::_BackgroundCompilation = BackgroundCompilation; | |
2023 | |
2024 // Parse JAVA_TOOL_OPTIONS environment variable (if present) | |
2025 jint result = parse_java_tool_options_environment_variable(&scp, &scp_assembly_required); | |
2026 if (result != JNI_OK) { | |
2027 return result; | |
2028 } | |
2029 | |
2030 // Parse JavaVMInitArgs structure passed in | |
2031 result = parse_each_vm_init_arg(args, &scp, &scp_assembly_required, COMMAND_LINE); | |
2032 if (result != JNI_OK) { | |
2033 return result; | |
2034 } | |
2035 | |
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2036 if (AggressiveOpts) { |
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2037 // Insert alt-rt.jar between user-specified bootclasspath |
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2038 // prefix and the default bootclasspath. os::set_boot_path() |
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2039 // uses meta_index_dir as the default bootclasspath directory. |
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2040 const char* altclasses_jar = "alt-rt.jar"; |
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2041 size_t altclasses_path_len = strlen(get_meta_index_dir()) + 1 + |
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2042 strlen(altclasses_jar); |
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2043 char* altclasses_path = NEW_C_HEAP_ARRAY(char, altclasses_path_len); |
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2044 strcpy(altclasses_path, get_meta_index_dir()); |
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2045 strcat(altclasses_path, altclasses_jar); |
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2046 scp.add_suffix_to_prefix(altclasses_path); |
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2047 scp_assembly_required = true; |
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2048 FREE_C_HEAP_ARRAY(char, altclasses_path); |
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2049 } |
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2050 |
0 | 2051 // Parse _JAVA_OPTIONS environment variable (if present) (mimics classic VM) |
2052 result = parse_java_options_environment_variable(&scp, &scp_assembly_required); | |
2053 if (result != JNI_OK) { | |
2054 return result; | |
2055 } | |
2056 | |
2057 // Do final processing now that all arguments have been parsed | |
2058 result = finalize_vm_init_args(&scp, scp_assembly_required); | |
2059 if (result != JNI_OK) { | |
2060 return result; | |
2061 } | |
2062 | |
2063 return JNI_OK; | |
2064 } | |
2065 | |
2066 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, | |
2067 SysClassPath* scp_p, | |
2068 bool* scp_assembly_required_p, | |
2069 FlagValueOrigin origin) { | |
2070 // Remaining part of option string | |
2071 const char* tail; | |
2072 | |
2073 // iterate over arguments | |
2074 for (int index = 0; index < args->nOptions; index++) { | |
2075 bool is_absolute_path = false; // for -agentpath vs -agentlib | |
2076 | |
2077 const JavaVMOption* option = args->options + index; | |
2078 | |
2079 if (!match_option(option, "-Djava.class.path", &tail) && | |
2080 !match_option(option, "-Dsun.java.command", &tail) && | |
2081 !match_option(option, "-Dsun.java.launcher", &tail)) { | |
2082 | |
2083 // add all jvm options to the jvm_args string. This string | |
2084 // is used later to set the java.vm.args PerfData string constant. | |
2085 // the -Djava.class.path and the -Dsun.java.command options are | |
2086 // omitted from jvm_args string as each have their own PerfData | |
2087 // string constant object. | |
2088 build_jvm_args(option->optionString); | |
2089 } | |
2090 | |
2091 // -verbose:[class/gc/jni] | |
2092 if (match_option(option, "-verbose", &tail)) { | |
2093 if (!strcmp(tail, ":class") || !strcmp(tail, "")) { | |
2094 FLAG_SET_CMDLINE(bool, TraceClassLoading, true); | |
2095 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); | |
2096 } else if (!strcmp(tail, ":gc")) { | |
2097 FLAG_SET_CMDLINE(bool, PrintGC, true); | |
2098 } else if (!strcmp(tail, ":jni")) { | |
2099 FLAG_SET_CMDLINE(bool, PrintJNIResolving, true); | |
2100 } | |
2101 // -da / -ea / -disableassertions / -enableassertions | |
2102 // These accept an optional class/package name separated by a colon, e.g., | |
2103 // -da:java.lang.Thread. | |
2104 } else if (match_option(option, user_assertion_options, &tail, true)) { | |
2105 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' | |
2106 if (*tail == '\0') { | |
2107 JavaAssertions::setUserClassDefault(enable); | |
2108 } else { | |
2109 assert(*tail == ':', "bogus match by match_option()"); | |
2110 JavaAssertions::addOption(tail + 1, enable); | |
2111 } | |
2112 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions | |
2113 } else if (match_option(option, system_assertion_options, &tail, false)) { | |
2114 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' | |
2115 JavaAssertions::setSystemClassDefault(enable); | |
2116 // -bootclasspath: | |
2117 } else if (match_option(option, "-Xbootclasspath:", &tail)) { | |
2118 scp_p->reset_path(tail); | |
2119 *scp_assembly_required_p = true; | |
2120 // -bootclasspath/a: | |
2121 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) { | |
2122 scp_p->add_suffix(tail); | |
2123 *scp_assembly_required_p = true; | |
2124 // -bootclasspath/p: | |
2125 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) { | |
2126 scp_p->add_prefix(tail); | |
2127 *scp_assembly_required_p = true; | |
2128 // -Xrun | |
2129 } else if (match_option(option, "-Xrun", &tail)) { | |
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2130 if (tail != NULL) { |
0 | 2131 const char* pos = strchr(tail, ':'); |
2132 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; | |
2133 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); | |
2134 name[len] = '\0'; | |
2135 | |
2136 char *options = NULL; | |
2137 if(pos != NULL) { | |
2138 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied. | |
2139 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2), pos+1, len2); | |
2140 } | |
2141 #ifdef JVMTI_KERNEL | |
2142 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { | |
2143 warning("profiling and debugging agents are not supported with Kernel VM"); | |
2144 } else | |
2145 #endif // JVMTI_KERNEL | |
2146 add_init_library(name, options); | |
2147 } | |
2148 // -agentlib and -agentpath | |
2149 } else if (match_option(option, "-agentlib:", &tail) || | |
2150 (is_absolute_path = match_option(option, "-agentpath:", &tail))) { | |
2151 if(tail != NULL) { | |
2152 const char* pos = strchr(tail, '='); | |
2153 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; | |
2154 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); | |
2155 name[len] = '\0'; | |
2156 | |
2157 char *options = NULL; | |
2158 if(pos != NULL) { | |
2159 options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(pos + 1) + 1), pos + 1); | |
2160 } | |
2161 #ifdef JVMTI_KERNEL | |
2162 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { | |
2163 warning("profiling and debugging agents are not supported with Kernel VM"); | |
2164 } else | |
2165 #endif // JVMTI_KERNEL | |
2166 add_init_agent(name, options, is_absolute_path); | |
2167 | |
2168 } | |
2169 // -javaagent | |
2170 } else if (match_option(option, "-javaagent:", &tail)) { | |
2171 if(tail != NULL) { | |
2172 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1), tail); | |
2173 add_init_agent("instrument", options, false); | |
2174 } | |
2175 // -Xnoclassgc | |
2176 } else if (match_option(option, "-Xnoclassgc", &tail)) { | |
2177 FLAG_SET_CMDLINE(bool, ClassUnloading, false); | |
2178 // -Xincgc: i-CMS | |
2179 } else if (match_option(option, "-Xincgc", &tail)) { | |
2180 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); | |
2181 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, true); | |
2182 // -Xnoincgc: no i-CMS | |
2183 } else if (match_option(option, "-Xnoincgc", &tail)) { | |
2184 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); | |
2185 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, false); | |
2186 // -Xconcgc | |
2187 } else if (match_option(option, "-Xconcgc", &tail)) { | |
2188 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); | |
2189 // -Xnoconcgc | |
2190 } else if (match_option(option, "-Xnoconcgc", &tail)) { | |
2191 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); | |
2192 // -Xbatch | |
2193 } else if (match_option(option, "-Xbatch", &tail)) { | |
2194 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); | |
2195 // -Xmn for compatibility with other JVM vendors | |
2196 } else if (match_option(option, "-Xmn", &tail)) { | |
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2197 julong long_initial_eden_size = 0; |
0 | 2198 ArgsRange errcode = parse_memory_size(tail, &long_initial_eden_size, 1); |
2199 if (errcode != arg_in_range) { | |
2200 jio_fprintf(defaultStream::error_stream(), | |
2201 "Invalid initial eden size: %s\n", option->optionString); | |
2202 describe_range_error(errcode); | |
2203 return JNI_EINVAL; | |
2204 } | |
1064 | 2205 FLAG_SET_CMDLINE(uintx, MaxNewSize, (uintx)long_initial_eden_size); |
2206 FLAG_SET_CMDLINE(uintx, NewSize, (uintx)long_initial_eden_size); | |
0 | 2207 // -Xms |
2208 } else if (match_option(option, "-Xms", &tail)) { | |
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2209 julong long_initial_heap_size = 0; |
0 | 2210 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 1); |
2211 if (errcode != arg_in_range) { | |
2212 jio_fprintf(defaultStream::error_stream(), | |
2213 "Invalid initial heap size: %s\n", option->optionString); | |
2214 describe_range_error(errcode); | |
2215 return JNI_EINVAL; | |
2216 } | |
1064 | 2217 FLAG_SET_CMDLINE(uintx, InitialHeapSize, (uintx)long_initial_heap_size); |
0 | 2218 // Currently the minimum size and the initial heap sizes are the same. |
1064 | 2219 set_min_heap_size(InitialHeapSize); |
0 | 2220 // -Xmx |
2221 } else if (match_option(option, "-Xmx", &tail)) { | |
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2222 julong long_max_heap_size = 0; |
0 | 2223 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1); |
2224 if (errcode != arg_in_range) { | |
2225 jio_fprintf(defaultStream::error_stream(), | |
2226 "Invalid maximum heap size: %s\n", option->optionString); | |
2227 describe_range_error(errcode); | |
2228 return JNI_EINVAL; | |
2229 } | |
1064 | 2230 FLAG_SET_CMDLINE(uintx, MaxHeapSize, (uintx)long_max_heap_size); |
0 | 2231 // Xmaxf |
2232 } else if (match_option(option, "-Xmaxf", &tail)) { | |
2233 int maxf = (int)(atof(tail) * 100); | |
2234 if (maxf < 0 || maxf > 100) { | |
2235 jio_fprintf(defaultStream::error_stream(), | |
2236 "Bad max heap free percentage size: %s\n", | |
2237 option->optionString); | |
2238 return JNI_EINVAL; | |
2239 } else { | |
2240 FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf); | |
2241 } | |
2242 // Xminf | |
2243 } else if (match_option(option, "-Xminf", &tail)) { | |
2244 int minf = (int)(atof(tail) * 100); | |
2245 if (minf < 0 || minf > 100) { | |
2246 jio_fprintf(defaultStream::error_stream(), | |
2247 "Bad min heap free percentage size: %s\n", | |
2248 option->optionString); | |
2249 return JNI_EINVAL; | |
2250 } else { | |
2251 FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf); | |
2252 } | |
2253 // -Xss | |
2254 } else if (match_option(option, "-Xss", &tail)) { | |
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2255 julong long_ThreadStackSize = 0; |
0 | 2256 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000); |
2257 if (errcode != arg_in_range) { | |
2258 jio_fprintf(defaultStream::error_stream(), | |
2259 "Invalid thread stack size: %s\n", option->optionString); | |
2260 describe_range_error(errcode); | |
2261 return JNI_EINVAL; | |
2262 } | |
2263 // Internally track ThreadStackSize in units of 1024 bytes. | |
2264 FLAG_SET_CMDLINE(intx, ThreadStackSize, | |
2265 round_to((int)long_ThreadStackSize, K) / K); | |
2266 // -Xoss | |
2267 } else if (match_option(option, "-Xoss", &tail)) { | |
2268 // HotSpot does not have separate native and Java stacks, ignore silently for compatibility | |
2269 // -Xmaxjitcodesize | |
2270 } else if (match_option(option, "-Xmaxjitcodesize", &tail)) { | |
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2271 julong long_ReservedCodeCacheSize = 0; |
0 | 2272 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, |
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2273 (size_t)InitialCodeCacheSize); |
0 | 2274 if (errcode != arg_in_range) { |
2275 jio_fprintf(defaultStream::error_stream(), | |
2276 "Invalid maximum code cache size: %s\n", | |
2277 option->optionString); | |
2278 describe_range_error(errcode); | |
2279 return JNI_EINVAL; | |
2280 } | |
2281 FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize); | |
2282 // -green | |
2283 } else if (match_option(option, "-green", &tail)) { | |
2284 jio_fprintf(defaultStream::error_stream(), | |
2285 "Green threads support not available\n"); | |
2286 return JNI_EINVAL; | |
2287 // -native | |
2288 } else if (match_option(option, "-native", &tail)) { | |
2289 // HotSpot always uses native threads, ignore silently for compatibility | |
2290 // -Xsqnopause | |
2291 } else if (match_option(option, "-Xsqnopause", &tail)) { | |
2292 // EVM option, ignore silently for compatibility | |
2293 // -Xrs | |
2294 } else if (match_option(option, "-Xrs", &tail)) { | |
2295 // Classic/EVM option, new functionality | |
2296 FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true); | |
2297 } else if (match_option(option, "-Xusealtsigs", &tail)) { | |
2298 // change default internal VM signals used - lower case for back compat | |
2299 FLAG_SET_CMDLINE(bool, UseAltSigs, true); | |
2300 // -Xoptimize | |
2301 } else if (match_option(option, "-Xoptimize", &tail)) { | |
2302 // EVM option, ignore silently for compatibility | |
2303 // -Xprof | |
2304 } else if (match_option(option, "-Xprof", &tail)) { | |
2305 #ifndef FPROF_KERNEL | |
2306 _has_profile = true; | |
2307 #else // FPROF_KERNEL | |
2308 // do we have to exit? | |
2309 warning("Kernel VM does not support flat profiling."); | |
2310 #endif // FPROF_KERNEL | |
2311 // -Xaprof | |
2312 } else if (match_option(option, "-Xaprof", &tail)) { | |
2313 _has_alloc_profile = true; | |
2314 // -Xconcurrentio | |
2315 } else if (match_option(option, "-Xconcurrentio", &tail)) { | |
2316 FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true); | |
2317 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); | |
2318 FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1); | |
2319 FLAG_SET_CMDLINE(bool, UseTLAB, false); | |
2320 FLAG_SET_CMDLINE(uintx, NewSizeThreadIncrease, 16 * K); // 20Kb per thread added to new generation | |
2321 | |
2322 // -Xinternalversion | |
2323 } else if (match_option(option, "-Xinternalversion", &tail)) { | |
2324 jio_fprintf(defaultStream::output_stream(), "%s\n", | |
2325 VM_Version::internal_vm_info_string()); | |
2326 vm_exit(0); | |
2327 #ifndef PRODUCT | |
2328 // -Xprintflags | |
2329 } else if (match_option(option, "-Xprintflags", &tail)) { | |
2330 CommandLineFlags::printFlags(); | |
2331 vm_exit(0); | |
2332 #endif | |
2333 // -D | |
2334 } else if (match_option(option, "-D", &tail)) { | |
2335 if (!add_property(tail)) { | |
2336 return JNI_ENOMEM; | |
2337 } | |
2338 // Out of the box management support | |
2339 if (match_option(option, "-Dcom.sun.management", &tail)) { | |
2340 FLAG_SET_CMDLINE(bool, ManagementServer, true); | |
2341 } | |
2342 // -Xint | |
2343 } else if (match_option(option, "-Xint", &tail)) { | |
2344 set_mode_flags(_int); | |
2345 // -Xmixed | |
2346 } else if (match_option(option, "-Xmixed", &tail)) { | |
2347 set_mode_flags(_mixed); | |
2348 // -Xcomp | |
2349 } else if (match_option(option, "-Xcomp", &tail)) { | |
2350 // for testing the compiler; turn off all flags that inhibit compilation | |
2351 set_mode_flags(_comp); | |
2352 | |
2353 // -Xshare:dump | |
2354 } else if (match_option(option, "-Xshare:dump", &tail)) { | |
2355 #ifdef TIERED | |
2356 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); | |
2357 set_mode_flags(_int); // Prevent compilation, which creates objects | |
2358 #elif defined(COMPILER2) | |
2359 vm_exit_during_initialization( | |
2360 "Dumping a shared archive is not supported on the Server JVM.", NULL); | |
2361 #elif defined(KERNEL) | |
2362 vm_exit_during_initialization( | |
2363 "Dumping a shared archive is not supported on the Kernel JVM.", NULL); | |
2364 #else | |
2365 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); | |
2366 set_mode_flags(_int); // Prevent compilation, which creates objects | |
2367 #endif | |
2368 // -Xshare:on | |
2369 } else if (match_option(option, "-Xshare:on", &tail)) { | |
2370 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); | |
2371 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true); | |
2372 #ifdef TIERED | |
2373 FLAG_SET_CMDLINE(bool, ForceSharedSpaces, true); | |
2374 #endif // TIERED | |
2375 // -Xshare:auto | |
2376 } else if (match_option(option, "-Xshare:auto", &tail)) { | |
2377 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); | |
2378 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); | |
2379 // -Xshare:off | |
2380 } else if (match_option(option, "-Xshare:off", &tail)) { | |
2381 FLAG_SET_CMDLINE(bool, UseSharedSpaces, false); | |
2382 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); | |
2383 | |
2384 // -Xverify | |
2385 } else if (match_option(option, "-Xverify", &tail)) { | |
2386 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) { | |
2387 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true); | |
2388 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); | |
2389 } else if (strcmp(tail, ":remote") == 0) { | |
2390 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); | |
2391 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); | |
2392 } else if (strcmp(tail, ":none") == 0) { | |
2393 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); | |
2394 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false); | |
2395 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) { | |
2396 return JNI_EINVAL; | |
2397 } | |
2398 // -Xdebug | |
2399 } else if (match_option(option, "-Xdebug", &tail)) { | |
2400 // note this flag has been used, then ignore | |
2401 set_xdebug_mode(true); | |
2402 // -Xnoagent | |
2403 } else if (match_option(option, "-Xnoagent", &tail)) { | |
2404 // For compatibility with classic. HotSpot refuses to load the old style agent.dll. | |
2405 } else if (match_option(option, "-Xboundthreads", &tail)) { | |
2406 // Bind user level threads to kernel threads (Solaris only) | |
2407 FLAG_SET_CMDLINE(bool, UseBoundThreads, true); | |
2408 } else if (match_option(option, "-Xloggc:", &tail)) { | |
2409 // Redirect GC output to the file. -Xloggc:<filename> | |
2410 // ostream_init_log(), when called will use this filename | |
2411 // to initialize a fileStream. | |
2412 _gc_log_filename = strdup(tail); | |
2413 FLAG_SET_CMDLINE(bool, PrintGC, true); | |
2414 FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true); | |
2415 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); | |
2416 | |
2417 // JNI hooks | |
2418 } else if (match_option(option, "-Xcheck", &tail)) { | |
2419 if (!strcmp(tail, ":jni")) { | |
2420 CheckJNICalls = true; | |
2421 } else if (is_bad_option(option, args->ignoreUnrecognized, | |
2422 "check")) { | |
2423 return JNI_EINVAL; | |
2424 } | |
2425 } else if (match_option(option, "vfprintf", &tail)) { | |
2426 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo); | |
2427 } else if (match_option(option, "exit", &tail)) { | |
2428 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo); | |
2429 } else if (match_option(option, "abort", &tail)) { | |
2430 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo); | |
2431 // -XX:+AggressiveHeap | |
2432 } else if (match_option(option, "-XX:+AggressiveHeap", &tail)) { | |
2433 | |
2434 // This option inspects the machine and attempts to set various | |
2435 // parameters to be optimal for long-running, memory allocation | |
2436 // intensive jobs. It is intended for machines with large | |
2437 // amounts of cpu and memory. | |
2438 | |
2439 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit | |
2440 // VM, but we may not be able to represent the total physical memory | |
2441 // available (like having 8gb of memory on a box but using a 32bit VM). | |
2442 // Thus, we need to make sure we're using a julong for intermediate | |
2443 // calculations. | |
2444 julong initHeapSize; | |
2445 julong total_memory = os::physical_memory(); | |
2446 | |
2447 if (total_memory < (julong)256*M) { | |
2448 jio_fprintf(defaultStream::error_stream(), | |
2449 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n"); | |
2450 vm_exit(1); | |
2451 } | |
2452 | |
2453 // The heap size is half of available memory, or (at most) | |
2454 // all of possible memory less 160mb (leaving room for the OS | |
2455 // when using ISM). This is the maximum; because adaptive sizing | |
2456 // is turned on below, the actual space used may be smaller. | |
2457 | |
2458 initHeapSize = MIN2(total_memory / (julong)2, | |
2459 total_memory - (julong)160*M); | |
2460 | |
2461 // Make sure that if we have a lot of memory we cap the 32 bit | |
2462 // process space. The 64bit VM version of this function is a nop. | |
2463 initHeapSize = os::allocatable_physical_memory(initHeapSize); | |
2464 | |
2465 // The perm gen is separate but contiguous with the | |
2466 // object heap (and is reserved with it) so subtract it | |
2467 // from the heap size. | |
2468 if (initHeapSize > MaxPermSize) { | |
2469 initHeapSize = initHeapSize - MaxPermSize; | |
2470 } else { | |
2471 warning("AggressiveHeap and MaxPermSize values may conflict"); | |
2472 } | |
2473 | |
2474 if (FLAG_IS_DEFAULT(MaxHeapSize)) { | |
2475 FLAG_SET_CMDLINE(uintx, MaxHeapSize, initHeapSize); | |
1064 | 2476 FLAG_SET_CMDLINE(uintx, InitialHeapSize, initHeapSize); |
0 | 2477 // Currently the minimum size and the initial heap sizes are the same. |
1064 | 2478 set_min_heap_size(initHeapSize); |
0 | 2479 } |
2480 if (FLAG_IS_DEFAULT(NewSize)) { | |
2481 // Make the young generation 3/8ths of the total heap. | |
2482 FLAG_SET_CMDLINE(uintx, NewSize, | |
2483 ((julong)MaxHeapSize / (julong)8) * (julong)3); | |
2484 FLAG_SET_CMDLINE(uintx, MaxNewSize, NewSize); | |
2485 } | |
2486 | |
2487 FLAG_SET_DEFAULT(UseLargePages, true); | |
2488 | |
2489 // Increase some data structure sizes for efficiency | |
2490 FLAG_SET_CMDLINE(uintx, BaseFootPrintEstimate, MaxHeapSize); | |
2491 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); | |
2492 FLAG_SET_CMDLINE(uintx, TLABSize, 256*K); | |
2493 | |
2494 // See the OldPLABSize comment below, but replace 'after promotion' | |
2495 // with 'after copying'. YoungPLABSize is the size of the survivor | |
2496 // space per-gc-thread buffers. The default is 4kw. | |
2497 FLAG_SET_CMDLINE(uintx, YoungPLABSize, 256*K); // Note: this is in words | |
2498 | |
2499 // OldPLABSize is the size of the buffers in the old gen that | |
2500 // UseParallelGC uses to promote live data that doesn't fit in the | |
2501 // survivor spaces. At any given time, there's one for each gc thread. | |
2502 // The default size is 1kw. These buffers are rarely used, since the | |
2503 // survivor spaces are usually big enough. For specjbb, however, there | |
2504 // are occasions when there's lots of live data in the young gen | |
2505 // and we end up promoting some of it. We don't have a definite | |
2506 // explanation for why bumping OldPLABSize helps, but the theory | |
2507 // is that a bigger PLAB results in retaining something like the | |
2508 // original allocation order after promotion, which improves mutator | |
2509 // locality. A minor effect may be that larger PLABs reduce the | |
2510 // number of PLAB allocation events during gc. The value of 8kw | |
2511 // was arrived at by experimenting with specjbb. | |
2512 FLAG_SET_CMDLINE(uintx, OldPLABSize, 8*K); // Note: this is in words | |
2513 | |
2514 // CompilationPolicyChoice=0 causes the server compiler to adopt | |
2515 // a more conservative which-method-do-I-compile policy when one | |
2516 // of the counters maintained by the interpreter trips. The | |
2517 // result is reduced startup time and improved specjbb and | |
2518 // alacrity performance. Zero is the default, but we set it | |
2519 // explicitly here in case the default changes. | |
2520 // See runtime/compilationPolicy.*. | |
2521 FLAG_SET_CMDLINE(intx, CompilationPolicyChoice, 0); | |
2522 | |
2523 // Enable parallel GC and adaptive generation sizing | |
2524 FLAG_SET_CMDLINE(bool, UseParallelGC, true); | |
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|
2525 FLAG_SET_DEFAULT(ParallelGCThreads, |
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|
2526 Abstract_VM_Version::parallel_worker_threads()); |
0 | 2527 |
2528 // Encourage steady state memory management | |
2529 FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100); | |
2530 | |
2531 // This appears to improve mutator locality | |
2532 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); | |
2533 | |
2534 // Get around early Solaris scheduling bug | |
2535 // (affinity vs other jobs on system) | |
2536 // but disallow DR and offlining (5008695). | |
2537 FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true); | |
2538 | |
2539 } else if (match_option(option, "-XX:+NeverTenure", &tail)) { | |
2540 // The last option must always win. | |
2541 FLAG_SET_CMDLINE(bool, AlwaysTenure, false); | |
2542 FLAG_SET_CMDLINE(bool, NeverTenure, true); | |
2543 } else if (match_option(option, "-XX:+AlwaysTenure", &tail)) { | |
2544 // The last option must always win. | |
2545 FLAG_SET_CMDLINE(bool, NeverTenure, false); | |
2546 FLAG_SET_CMDLINE(bool, AlwaysTenure, true); | |
2547 } else if (match_option(option, "-XX:+CMSPermGenSweepingEnabled", &tail) || | |
2548 match_option(option, "-XX:-CMSPermGenSweepingEnabled", &tail)) { | |
2549 jio_fprintf(defaultStream::error_stream(), | |
2550 "Please use CMSClassUnloadingEnabled in place of " | |
2551 "CMSPermGenSweepingEnabled in the future\n"); | |
2552 } else if (match_option(option, "-XX:+UseGCTimeLimit", &tail)) { | |
2553 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, true); | |
2554 jio_fprintf(defaultStream::error_stream(), | |
2555 "Please use -XX:+UseGCOverheadLimit in place of " | |
2556 "-XX:+UseGCTimeLimit in the future\n"); | |
2557 } else if (match_option(option, "-XX:-UseGCTimeLimit", &tail)) { | |
2558 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, false); | |
2559 jio_fprintf(defaultStream::error_stream(), | |
2560 "Please use -XX:-UseGCOverheadLimit in place of " | |
2561 "-XX:-UseGCTimeLimit in the future\n"); | |
2562 // The TLE options are for compatibility with 1.3 and will be | |
2563 // removed without notice in a future release. These options | |
2564 // are not to be documented. | |
2565 } else if (match_option(option, "-XX:MaxTLERatio=", &tail)) { | |
2566 // No longer used. | |
2567 } else if (match_option(option, "-XX:+ResizeTLE", &tail)) { | |
2568 FLAG_SET_CMDLINE(bool, ResizeTLAB, true); | |
2569 } else if (match_option(option, "-XX:-ResizeTLE", &tail)) { | |
2570 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); | |
2571 } else if (match_option(option, "-XX:+PrintTLE", &tail)) { | |
2572 FLAG_SET_CMDLINE(bool, PrintTLAB, true); | |
2573 } else if (match_option(option, "-XX:-PrintTLE", &tail)) { | |
2574 FLAG_SET_CMDLINE(bool, PrintTLAB, false); | |
2575 } else if (match_option(option, "-XX:TLEFragmentationRatio=", &tail)) { | |
2576 // No longer used. | |
2577 } else if (match_option(option, "-XX:TLESize=", &tail)) { | |
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|
2578 julong long_tlab_size = 0; |
0 | 2579 ArgsRange errcode = parse_memory_size(tail, &long_tlab_size, 1); |
2580 if (errcode != arg_in_range) { | |
2581 jio_fprintf(defaultStream::error_stream(), | |
2582 "Invalid TLAB size: %s\n", option->optionString); | |
2583 describe_range_error(errcode); | |
2584 return JNI_EINVAL; | |
2585 } | |
2586 FLAG_SET_CMDLINE(uintx, TLABSize, long_tlab_size); | |
2587 } else if (match_option(option, "-XX:TLEThreadRatio=", &tail)) { | |
2588 // No longer used. | |
2589 } else if (match_option(option, "-XX:+UseTLE", &tail)) { | |
2590 FLAG_SET_CMDLINE(bool, UseTLAB, true); | |
2591 } else if (match_option(option, "-XX:-UseTLE", &tail)) { | |
2592 FLAG_SET_CMDLINE(bool, UseTLAB, false); | |
2593 SOLARIS_ONLY( | |
2594 } else if (match_option(option, "-XX:+UsePermISM", &tail)) { | |
2595 warning("-XX:+UsePermISM is obsolete."); | |
2596 FLAG_SET_CMDLINE(bool, UseISM, true); | |
2597 } else if (match_option(option, "-XX:-UsePermISM", &tail)) { | |
2598 FLAG_SET_CMDLINE(bool, UseISM, false); | |
2599 ) | |
2600 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr", &tail)) { | |
2601 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false); | |
2602 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true); | |
2603 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout", &tail)) { | |
2604 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false); | |
2605 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true); | |
2606 } else if (match_option(option, "-XX:+ExtendedDTraceProbes", &tail)) { | |
2607 #ifdef SOLARIS | |
2608 FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true); | |
2609 FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true); | |
2610 FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true); | |
2611 FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true); | |
2612 #else // ndef SOLARIS | |
2613 jio_fprintf(defaultStream::error_stream(), | |
2614 "ExtendedDTraceProbes flag is only applicable on Solaris\n"); | |
2615 return JNI_EINVAL; | |
2616 #endif // ndef SOLARIS | |
2617 #ifdef ASSERT | |
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1074
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|
2618 } else if (match_option(option, "-XX:+FullGCALot", &tail)) { |
0 | 2619 FLAG_SET_CMDLINE(bool, FullGCALot, true); |
2620 // disable scavenge before parallel mark-compact | |
2621 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); | |
2622 #endif | |
1145
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diff
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|
2623 } else if (match_option(option, "-XX:CMSParPromoteBlocksToClaim=", &tail)) { |
0 | 2624 julong cms_blocks_to_claim = (julong)atol(tail); |
2625 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); | |
2626 jio_fprintf(defaultStream::error_stream(), | |
1145
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6631166: CMS: better heuristics when combatting fragmentation
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1074
diff
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|
2627 "Please use -XX:OldPLABSize in place of " |
e018e6884bd8
6631166: CMS: better heuristics when combatting fragmentation
ysr
parents:
1074
diff
changeset
|
2628 "-XX:CMSParPromoteBlocksToClaim in the future\n"); |
e018e6884bd8
6631166: CMS: better heuristics when combatting fragmentation
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parents:
1074
diff
changeset
|
2629 } else if (match_option(option, "-XX:ParCMSPromoteBlocksToClaim=", &tail)) { |
e018e6884bd8
6631166: CMS: better heuristics when combatting fragmentation
ysr
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1074
diff
changeset
|
2630 julong cms_blocks_to_claim = (julong)atol(tail); |
e018e6884bd8
6631166: CMS: better heuristics when combatting fragmentation
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parents:
1074
diff
changeset
|
2631 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); |
e018e6884bd8
6631166: CMS: better heuristics when combatting fragmentation
ysr
parents:
1074
diff
changeset
|
2632 jio_fprintf(defaultStream::error_stream(), |
e018e6884bd8
6631166: CMS: better heuristics when combatting fragmentation
ysr
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1074
diff
changeset
|
2633 "Please use -XX:OldPLABSize in place of " |
0 | 2634 "-XX:ParCMSPromoteBlocksToClaim in the future\n"); |
1145
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6631166: CMS: better heuristics when combatting fragmentation
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1074
diff
changeset
|
2635 } else if (match_option(option, "-XX:ParallelGCOldGenAllocBufferSize=", &tail)) { |
489
2494ab195856
6653214: MemoryPoolMXBean.setUsageThreshold() does not support large heap sizes.
swamyv
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483
diff
changeset
|
2636 julong old_plab_size = 0; |
0 | 2637 ArgsRange errcode = parse_memory_size(tail, &old_plab_size, 1); |
2638 if (errcode != arg_in_range) { | |
2639 jio_fprintf(defaultStream::error_stream(), | |
2640 "Invalid old PLAB size: %s\n", option->optionString); | |
2641 describe_range_error(errcode); | |
2642 return JNI_EINVAL; | |
2643 } | |
489
2494ab195856
6653214: MemoryPoolMXBean.setUsageThreshold() does not support large heap sizes.
swamyv
parents:
483
diff
changeset
|
2644 FLAG_SET_CMDLINE(uintx, OldPLABSize, old_plab_size); |
0 | 2645 jio_fprintf(defaultStream::error_stream(), |
2646 "Please use -XX:OldPLABSize in place of " | |
2647 "-XX:ParallelGCOldGenAllocBufferSize in the future\n"); | |
1145
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6631166: CMS: better heuristics when combatting fragmentation
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parents:
1074
diff
changeset
|
2648 } else if (match_option(option, "-XX:ParallelGCToSpaceAllocBufferSize=", &tail)) { |
489
2494ab195856
6653214: MemoryPoolMXBean.setUsageThreshold() does not support large heap sizes.
swamyv
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483
diff
changeset
|
2649 julong young_plab_size = 0; |
0 | 2650 ArgsRange errcode = parse_memory_size(tail, &young_plab_size, 1); |
2651 if (errcode != arg_in_range) { | |
2652 jio_fprintf(defaultStream::error_stream(), | |
2653 "Invalid young PLAB size: %s\n", option->optionString); | |
2654 describe_range_error(errcode); | |
2655 return JNI_EINVAL; | |
2656 } | |
489
2494ab195856
6653214: MemoryPoolMXBean.setUsageThreshold() does not support large heap sizes.
swamyv
parents:
483
diff
changeset
|
2657 FLAG_SET_CMDLINE(uintx, YoungPLABSize, young_plab_size); |
0 | 2658 jio_fprintf(defaultStream::error_stream(), |
2659 "Please use -XX:YoungPLABSize in place of " | |
2660 "-XX:ParallelGCToSpaceAllocBufferSize in the future\n"); | |
1284 | 2661 } else if (match_option(option, "-XX:CMSMarkStackSize=", &tail) || |
2662 match_option(option, "-XX:G1MarkStackSize=", &tail)) { | |
2663 julong stack_size = 0; | |
2664 ArgsRange errcode = parse_memory_size(tail, &stack_size, 1); | |
2665 if (errcode != arg_in_range) { | |
2666 jio_fprintf(defaultStream::error_stream(), | |
2667 "Invalid mark stack size: %s\n", option->optionString); | |
2668 describe_range_error(errcode); | |
2669 return JNI_EINVAL; | |
2670 } | |
2671 FLAG_SET_CMDLINE(uintx, MarkStackSize, stack_size); | |
2672 } else if (match_option(option, "-XX:CMSMarkStackSizeMax=", &tail)) { | |
2673 julong max_stack_size = 0; | |
2674 ArgsRange errcode = parse_memory_size(tail, &max_stack_size, 1); | |
2675 if (errcode != arg_in_range) { | |
2676 jio_fprintf(defaultStream::error_stream(), | |
2677 "Invalid maximum mark stack size: %s\n", | |
2678 option->optionString); | |
2679 describe_range_error(errcode); | |
2680 return JNI_EINVAL; | |
2681 } | |
2682 FLAG_SET_CMDLINE(uintx, MarkStackSizeMax, max_stack_size); | |
2683 } else if (match_option(option, "-XX:ParallelMarkingThreads=", &tail) || | |
2684 match_option(option, "-XX:ParallelCMSThreads=", &tail)) { | |
2685 uintx conc_threads = 0; | |
2686 if (!parse_uintx(tail, &conc_threads, 1)) { | |
2687 jio_fprintf(defaultStream::error_stream(), | |
2688 "Invalid concurrent threads: %s\n", option->optionString); | |
2689 return JNI_EINVAL; | |
2690 } | |
2691 FLAG_SET_CMDLINE(uintx, ConcGCThreads, conc_threads); | |
1145
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6631166: CMS: better heuristics when combatting fragmentation
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1074
diff
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|
2692 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx |
0 | 2693 // Skip -XX:Flags= since that case has already been handled |
2694 if (strncmp(tail, "Flags=", strlen("Flags=")) != 0) { | |
2695 if (!process_argument(tail, args->ignoreUnrecognized, origin)) { | |
2696 return JNI_EINVAL; | |
2697 } | |
2698 } | |
2699 // Unknown option | |
2700 } else if (is_bad_option(option, args->ignoreUnrecognized)) { | |
2701 return JNI_ERR; | |
2702 } | |
2703 } | |
449
171e581e8161
6554406: Change switch UseVMInterruptibleIO default to false (sol)
xlu
parents:
420
diff
changeset
|
2704 // Change the default value for flags which have different default values |
171e581e8161
6554406: Change switch UseVMInterruptibleIO default to false (sol)
xlu
parents:
420
diff
changeset
|
2705 // when working with older JDKs. |
171e581e8161
6554406: Change switch UseVMInterruptibleIO default to false (sol)
xlu
parents:
420
diff
changeset
|
2706 if (JDK_Version::current().compare_major(6) <= 0 && |
171e581e8161
6554406: Change switch UseVMInterruptibleIO default to false (sol)
xlu
parents:
420
diff
changeset
|
2707 FLAG_IS_DEFAULT(UseVMInterruptibleIO)) { |
171e581e8161
6554406: Change switch UseVMInterruptibleIO default to false (sol)
xlu
parents:
420
diff
changeset
|
2708 FLAG_SET_DEFAULT(UseVMInterruptibleIO, true); |
171e581e8161
6554406: Change switch UseVMInterruptibleIO default to false (sol)
xlu
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420
diff
changeset
|
2709 } |
1679
3d90023429ec
6888526: Linux getCurrentThreadCpuTime is drastically slower than Windows
aph
parents:
1628
diff
changeset
|
2710 #ifdef LINUX |
3d90023429ec
6888526: Linux getCurrentThreadCpuTime is drastically slower than Windows
aph
parents:
1628
diff
changeset
|
2711 if (JDK_Version::current().compare_major(6) <= 0 && |
3d90023429ec
6888526: Linux getCurrentThreadCpuTime is drastically slower than Windows
aph
parents:
1628
diff
changeset
|
2712 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) { |
3d90023429ec
6888526: Linux getCurrentThreadCpuTime is drastically slower than Windows
aph
parents:
1628
diff
changeset
|
2713 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false); |
3d90023429ec
6888526: Linux getCurrentThreadCpuTime is drastically slower than Windows
aph
parents:
1628
diff
changeset
|
2714 } |
3d90023429ec
6888526: Linux getCurrentThreadCpuTime is drastically slower than Windows
aph
parents:
1628
diff
changeset
|
2715 #endif // LINUX |
0 | 2716 return JNI_OK; |
2717 } | |
2718 | |
2719 jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) { | |
2720 // This must be done after all -D arguments have been processed. | |
2721 scp_p->expand_endorsed(); | |
2722 | |
2723 if (scp_assembly_required || scp_p->get_endorsed() != NULL) { | |
2724 // Assemble the bootclasspath elements into the final path. | |
2725 Arguments::set_sysclasspath(scp_p->combined_path()); | |
2726 } | |
2727 | |
2728 // This must be done after all arguments have been processed. | |
2729 // java_compiler() true means set to "NONE" or empty. | |
2730 if (java_compiler() && !xdebug_mode()) { | |
2731 // For backwards compatibility, we switch to interpreted mode if | |
2732 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was | |
2733 // not specified. | |
2734 set_mode_flags(_int); | |
2735 } | |
2736 if (CompileThreshold == 0) { | |
2737 set_mode_flags(_int); | |
2738 } | |
2739 | |
2740 #ifndef COMPILER2 | |
2741 // Don't degrade server performance for footprint | |
2742 if (FLAG_IS_DEFAULT(UseLargePages) && | |
2743 MaxHeapSize < LargePageHeapSizeThreshold) { | |
2744 // No need for large granularity pages w/small heaps. | |
2745 // Note that large pages are enabled/disabled for both the | |
2746 // Java heap and the code cache. | |
2747 FLAG_SET_DEFAULT(UseLargePages, false); | |
2748 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseMPSS, false)); | |
2749 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseISM, false)); | |
2750 } | |
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37f87013dfd8
6711316: Open source the Garbage-First garbage collector
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135
diff
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|
2751 |
1251
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1188
diff
changeset
|
2752 // Tiered compilation is undefined with C1. |
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1188
diff
changeset
|
2753 TieredCompilation = false; |
0 | 2754 #else |
2755 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) { | |
2756 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1); | |
2757 } | |
342
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|
2758 // Temporary disable bulk zeroing reduction with G1. See CR 6627983. |
37f87013dfd8
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diff
changeset
|
2759 if (UseG1GC) { |
37f87013dfd8
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diff
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|
2760 FLAG_SET_DEFAULT(ReduceBulkZeroing, false); |
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6711316: Open source the Garbage-First garbage collector
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diff
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|
2761 } |
0 | 2762 #endif |
2763 | |
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1679
diff
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|
2764 // If we are running in a headless jre, force java.awt.headless property |
126ea7725993
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diff
changeset
|
2765 // to be true unless the property has already been set. |
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1679
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changeset
|
2766 // Also allow the OS environment variable JAVA_AWT_HEADLESS to set headless state. |
126ea7725993
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bobv
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1679
diff
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|
2767 if (os::is_headless_jre()) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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parents:
1679
diff
changeset
|
2768 const char* headless = Arguments::get_property("java.awt.headless"); |
126ea7725993
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bobv
parents:
1679
diff
changeset
|
2769 if (headless == NULL) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1679
diff
changeset
|
2770 char envbuffer[128]; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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1679
diff
changeset
|
2771 if (!os::getenv("JAVA_AWT_HEADLESS", envbuffer, sizeof(envbuffer))) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1679
diff
changeset
|
2772 if (!add_property("java.awt.headless=true")) { |
126ea7725993
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bobv
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1679
diff
changeset
|
2773 return JNI_ENOMEM; |
126ea7725993
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1679
diff
changeset
|
2774 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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1679
diff
changeset
|
2775 } else { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
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1679
diff
changeset
|
2776 char buffer[256]; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1679
diff
changeset
|
2777 strcpy(buffer, "java.awt.headless="); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1679
diff
changeset
|
2778 strcat(buffer, envbuffer); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1679
diff
changeset
|
2779 if (!add_property(buffer)) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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parents:
1679
diff
changeset
|
2780 return JNI_ENOMEM; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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1679
diff
changeset
|
2781 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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1679
diff
changeset
|
2782 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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1679
diff
changeset
|
2783 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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1679
diff
changeset
|
2784 } |
126ea7725993
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diff
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|
2785 |
0 | 2786 if (!check_vm_args_consistency()) { |
2787 return JNI_ERR; | |
2788 } | |
2789 | |
2790 return JNI_OK; | |
2791 } | |
2792 | |
2793 jint Arguments::parse_java_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { | |
2794 return parse_options_environment_variable("_JAVA_OPTIONS", scp_p, | |
2795 scp_assembly_required_p); | |
2796 } | |
2797 | |
2798 jint Arguments::parse_java_tool_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { | |
2799 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", scp_p, | |
2800 scp_assembly_required_p); | |
2801 } | |
2802 | |
2803 jint Arguments::parse_options_environment_variable(const char* name, SysClassPath* scp_p, bool* scp_assembly_required_p) { | |
2804 const int N_MAX_OPTIONS = 64; | |
2805 const int OPTION_BUFFER_SIZE = 1024; | |
2806 char buffer[OPTION_BUFFER_SIZE]; | |
2807 | |
2808 // The variable will be ignored if it exceeds the length of the buffer. | |
2809 // Don't check this variable if user has special privileges | |
2810 // (e.g. unix su command). | |
2811 if (os::getenv(name, buffer, sizeof(buffer)) && | |
2812 !os::have_special_privileges()) { | |
2813 JavaVMOption options[N_MAX_OPTIONS]; // Construct option array | |
2814 jio_fprintf(defaultStream::error_stream(), | |
2815 "Picked up %s: %s\n", name, buffer); | |
2816 char* rd = buffer; // pointer to the input string (rd) | |
2817 int i; | |
2818 for (i = 0; i < N_MAX_OPTIONS;) { // repeat for all options in the input string | |
2819 while (isspace(*rd)) rd++; // skip whitespace | |
2820 if (*rd == 0) break; // we re done when the input string is read completely | |
2821 | |
2822 // The output, option string, overwrites the input string. | |
2823 // Because of quoting, the pointer to the option string (wrt) may lag the pointer to | |
2824 // input string (rd). | |
2825 char* wrt = rd; | |
2826 | |
2827 options[i++].optionString = wrt; // Fill in option | |
2828 while (*rd != 0 && !isspace(*rd)) { // unquoted strings terminate with a space or NULL | |
2829 if (*rd == '\'' || *rd == '"') { // handle a quoted string | |
2830 int quote = *rd; // matching quote to look for | |
2831 rd++; // don't copy open quote | |
2832 while (*rd != quote) { // include everything (even spaces) up until quote | |
2833 if (*rd == 0) { // string termination means unmatched string | |
2834 jio_fprintf(defaultStream::error_stream(), | |
2835 "Unmatched quote in %s\n", name); | |
2836 return JNI_ERR; | |
2837 } | |
2838 *wrt++ = *rd++; // copy to option string | |
2839 } | |
2840 rd++; // don't copy close quote | |
2841 } else { | |
2842 *wrt++ = *rd++; // copy to option string | |
2843 } | |
2844 } | |
2845 // Need to check if we're done before writing a NULL, | |
2846 // because the write could be to the byte that rd is pointing to. | |
2847 if (*rd++ == 0) { | |
2848 *wrt = 0; | |
2849 break; | |
2850 } | |
2851 *wrt = 0; // Zero terminate option | |
2852 } | |
2853 // Construct JavaVMInitArgs structure and parse as if it was part of the command line | |
2854 JavaVMInitArgs vm_args; | |
2855 vm_args.version = JNI_VERSION_1_2; | |
2856 vm_args.options = options; | |
2857 vm_args.nOptions = i; | |
564 | 2858 vm_args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions; |
0 | 2859 |
2860 if (PrintVMOptions) { | |
2861 const char* tail; | |
2862 for (int i = 0; i < vm_args.nOptions; i++) { | |
2863 const JavaVMOption *option = vm_args.options + i; | |
2864 if (match_option(option, "-XX:", &tail)) { | |
2865 logOption(tail); | |
2866 } | |
2867 } | |
2868 } | |
2869 | |
2870 return(parse_each_vm_init_arg(&vm_args, scp_p, scp_assembly_required_p, ENVIRON_VAR)); | |
2871 } | |
2872 return JNI_OK; | |
2873 } | |
2874 | |
1891
9de67bf4244d
6996136: VM crash in src/share/vm/runtime/virtualspace.cpp:424
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parents:
1890
diff
changeset
|
2875 |
0 | 2876 // Parse entry point called from JNI_CreateJavaVM |
2877 | |
2878 jint Arguments::parse(const JavaVMInitArgs* args) { | |
2879 | |
2880 // Sharing support | |
2881 // Construct the path to the archive | |
2882 char jvm_path[JVM_MAXPATHLEN]; | |
2883 os::jvm_path(jvm_path, sizeof(jvm_path)); | |
2884 #ifdef TIERED | |
2885 if (strstr(jvm_path, "client") != NULL) { | |
2886 force_client_mode = true; | |
2887 } | |
2888 #endif // TIERED | |
2889 char *end = strrchr(jvm_path, *os::file_separator()); | |
2890 if (end != NULL) *end = '\0'; | |
2891 char *shared_archive_path = NEW_C_HEAP_ARRAY(char, strlen(jvm_path) + | |
2892 strlen(os::file_separator()) + 20); | |
2893 if (shared_archive_path == NULL) return JNI_ENOMEM; | |
2894 strcpy(shared_archive_path, jvm_path); | |
2895 strcat(shared_archive_path, os::file_separator()); | |
2896 strcat(shared_archive_path, "classes"); | |
2897 DEBUG_ONLY(strcat(shared_archive_path, "_g");) | |
2898 strcat(shared_archive_path, ".jsa"); | |
2899 SharedArchivePath = shared_archive_path; | |
2900 | |
2901 // Remaining part of option string | |
2902 const char* tail; | |
2903 | |
2904 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed. | |
2905 bool settings_file_specified = false; | |
564 | 2906 const char* flags_file; |
0 | 2907 int index; |
2908 for (index = 0; index < args->nOptions; index++) { | |
2909 const JavaVMOption *option = args->options + index; | |
2910 if (match_option(option, "-XX:Flags=", &tail)) { | |
564 | 2911 flags_file = tail; |
0 | 2912 settings_file_specified = true; |
2913 } | |
2914 if (match_option(option, "-XX:+PrintVMOptions", &tail)) { | |
2915 PrintVMOptions = true; | |
2916 } | |
253
b0fe4deeb9fb
6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
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196
diff
changeset
|
2917 if (match_option(option, "-XX:-PrintVMOptions", &tail)) { |
b0fe4deeb9fb
6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents:
196
diff
changeset
|
2918 PrintVMOptions = false; |
b0fe4deeb9fb
6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents:
196
diff
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|
2919 } |
564 | 2920 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions", &tail)) { |
2921 IgnoreUnrecognizedVMOptions = true; | |
2922 } | |
2923 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions", &tail)) { | |
2924 IgnoreUnrecognizedVMOptions = false; | |
2925 } | |
1150 | 2926 if (match_option(option, "-XX:+PrintFlagsInitial", &tail)) { |
2927 CommandLineFlags::printFlags(); | |
2928 vm_exit(0); | |
2929 } | |
1768
6ee479178066
6979444: add command line option to print command line flags descriptions
ikrylov
parents:
1745
diff
changeset
|
2930 |
6ee479178066
6979444: add command line option to print command line flags descriptions
ikrylov
parents:
1745
diff
changeset
|
2931 #ifndef PRODUCT |
6ee479178066
6979444: add command line option to print command line flags descriptions
ikrylov
parents:
1745
diff
changeset
|
2932 if (match_option(option, "-XX:+PrintFlagsWithComments", &tail)) { |
6ee479178066
6979444: add command line option to print command line flags descriptions
ikrylov
parents:
1745
diff
changeset
|
2933 CommandLineFlags::printFlags(true); |
6ee479178066
6979444: add command line option to print command line flags descriptions
ikrylov
parents:
1745
diff
changeset
|
2934 vm_exit(0); |
6ee479178066
6979444: add command line option to print command line flags descriptions
ikrylov
parents:
1745
diff
changeset
|
2935 } |
6ee479178066
6979444: add command line option to print command line flags descriptions
ikrylov
parents:
1745
diff
changeset
|
2936 #endif |
564 | 2937 } |
2938 | |
2939 if (IgnoreUnrecognizedVMOptions) { | |
2940 // uncast const to modify the flag args->ignoreUnrecognized | |
2941 *(jboolean*)(&args->ignoreUnrecognized) = true; | |
2942 } | |
2943 | |
2944 // Parse specified settings file | |
2945 if (settings_file_specified) { | |
2946 if (!process_settings_file(flags_file, true, args->ignoreUnrecognized)) { | |
2947 return JNI_EINVAL; | |
2948 } | |
0 | 2949 } |
2950 | |
2951 // Parse default .hotspotrc settings file | |
2952 if (!settings_file_specified) { | |
2953 if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) { | |
2954 return JNI_EINVAL; | |
2955 } | |
2956 } | |
2957 | |
2958 if (PrintVMOptions) { | |
2959 for (index = 0; index < args->nOptions; index++) { | |
2960 const JavaVMOption *option = args->options + index; | |
2961 if (match_option(option, "-XX:", &tail)) { | |
2962 logOption(tail); | |
2963 } | |
2964 } | |
2965 } | |
2966 | |
2967 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS | |
2968 jint result = parse_vm_init_args(args); | |
2969 if (result != JNI_OK) { | |
2970 return result; | |
2971 } | |
2972 | |
2973 #ifndef PRODUCT | |
2974 if (TraceBytecodesAt != 0) { | |
2975 TraceBytecodes = true; | |
2976 } | |
2977 if (CountCompiledCalls) { | |
2978 if (UseCounterDecay) { | |
2979 warning("UseCounterDecay disabled because CountCalls is set"); | |
2980 UseCounterDecay = false; | |
2981 } | |
2982 } | |
2983 #endif // PRODUCT | |
2984 | |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
712
diff
changeset
|
2985 if (EnableInvokeDynamic && !EnableMethodHandles) { |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
712
diff
changeset
|
2986 if (!FLAG_IS_DEFAULT(EnableMethodHandles)) { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
2987 warning("forcing EnableMethodHandles true because EnableInvokeDynamic is true"); |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
712
diff
changeset
|
2988 } |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
712
diff
changeset
|
2989 EnableMethodHandles = true; |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
712
diff
changeset
|
2990 } |
710 | 2991 if (EnableMethodHandles && !AnonymousClasses) { |
2992 if (!FLAG_IS_DEFAULT(AnonymousClasses)) { | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
2993 warning("forcing AnonymousClasses true because EnableMethodHandles is true"); |
710 | 2994 } |
2995 AnonymousClasses = true; | |
2996 } | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
2997 if ((EnableMethodHandles || AnonymousClasses) && ScavengeRootsInCode == 0) { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
2998 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
2999 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
|
3000 } |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
3001 ScavengeRootsInCode = 1; |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
3002 } |
1135
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
3003 #ifdef COMPILER2 |
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
3004 if (EnableInvokeDynamic && DoEscapeAnalysis) { |
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
3005 // 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
|
3006 // simply disable EA by default. |
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
3007 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) { |
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
3008 DoEscapeAnalysis = false; |
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
3009 } |
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
3010 } |
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
3011 #endif |
710 | 3012 |
0 | 3013 if (PrintGCDetails) { |
3014 // Turn on -verbose:gc options as well | |
3015 PrintGC = true; | |
3016 } | |
3017 | |
1571
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
1506
diff
changeset
|
3018 // 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
|
3019 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
|
3020 |
0 | 3021 #ifdef SERIALGC |
1064 | 3022 force_serial_gc(); |
0 | 3023 #endif // SERIALGC |
3024 #ifdef KERNEL | |
3025 no_shared_spaces(); | |
3026 #endif // KERNEL | |
3027 | |
3028 // Set flags based on ergonomics. | |
3029 set_ergonomics_flags(); | |
3030 | |
1135
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
3031 #ifdef _LP64 |
1891
9de67bf4244d
6996136: VM crash in src/share/vm/runtime/virtualspace.cpp:424
iveresov
parents:
1890
diff
changeset
|
3032 if (UseCompressedOops) { |
9de67bf4244d
6996136: VM crash in src/share/vm/runtime/virtualspace.cpp:424
iveresov
parents:
1890
diff
changeset
|
3033 check_compressed_oops_compat(); |
1135
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
3034 } |
1891
9de67bf4244d
6996136: VM crash in src/share/vm/runtime/virtualspace.cpp:424
iveresov
parents:
1890
diff
changeset
|
3035 #endif |
1135
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
3036 |
10
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
3037 // Check the GC selections again. |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
3038 if (!check_gc_consistency()) { |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
3039 return JNI_EINVAL; |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
3040 } |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
3041 |
1783 | 3042 if (TieredCompilation) { |
3043 set_tiered_flags(); | |
3044 } else { | |
3045 // Check if the policy is valid. Policies 0 and 1 are valid for non-tiered setup. | |
3046 if (CompilationPolicyChoice >= 2) { | |
3047 vm_exit_during_initialization( | |
3048 "Incompatible compilation policy selected", NULL); | |
3049 } | |
3050 } | |
3051 | |
1145
e018e6884bd8
6631166: CMS: better heuristics when combatting fragmentation
ysr
parents:
1074
diff
changeset
|
3052 #ifndef KERNEL |
1064 | 3053 if (UseConcMarkSweepGC) { |
3054 // Set flags for CMS and ParNew. Check UseConcMarkSweep first | |
3055 // to ensure that when both UseConcMarkSweepGC and UseParNewGC | |
3056 // 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
|
3057 set_cms_and_parnew_gc_flags(); |
1064 | 3058 } else { |
3059 // Set heap size based on available physical memory | |
3060 set_heap_size(); | |
3061 // Set per-collector flags | |
3062 if (UseParallelGC || UseParallelOldGC) { | |
3063 set_parallel_gc_flags(); | |
3064 } else if (UseParNewGC) { | |
3065 set_parnew_gc_flags(); | |
3066 } else if (UseG1GC) { | |
3067 set_g1_gc_flags(); | |
3068 } | |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
135
diff
changeset
|
3069 } |
1145
e018e6884bd8
6631166: CMS: better heuristics when combatting fragmentation
ysr
parents:
1074
diff
changeset
|
3070 #endif // KERNEL |
10
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
3071 |
0 | 3072 #ifdef SERIALGC |
3073 assert(verify_serial_gc_flags(), "SerialGC unset"); | |
3074 #endif // SERIALGC | |
3075 | |
3076 // Set bytecode rewriting flags | |
3077 set_bytecode_flags(); | |
3078 | |
3079 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled. | |
3080 set_aggressive_opts_flags(); | |
3081 | |
3082 #ifdef CC_INTERP | |
1131 | 3083 // Clear flags not supported by the C++ interpreter |
3084 FLAG_SET_DEFAULT(ProfileInterpreter, false); | |
0 | 3085 FLAG_SET_DEFAULT(UseBiasedLocking, false); |
1131 | 3086 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false)); |
3087 #endif // CC_INTERP | |
3088 | |
420
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
kvn
parents:
416
diff
changeset
|
3089 #ifdef COMPILER2 |
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
kvn
parents:
416
diff
changeset
|
3090 if (!UseBiasedLocking || EmitSync != 0) { |
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
kvn
parents:
416
diff
changeset
|
3091 UseOptoBiasInlining = false; |
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
kvn
parents:
416
diff
changeset
|
3092 } |
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
kvn
parents:
416
diff
changeset
|
3093 #endif |
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
kvn
parents:
416
diff
changeset
|
3094 |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1150
diff
changeset
|
3095 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) { |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1150
diff
changeset
|
3096 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
|
3097 DebugNonSafepoints = true; |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1150
diff
changeset
|
3098 } |
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
1150
diff
changeset
|
3099 |
1188
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1161
diff
changeset
|
3100 #ifndef PRODUCT |
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1161
diff
changeset
|
3101 if (CompileTheWorld) { |
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1161
diff
changeset
|
3102 // 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
|
3103 if (FLAG_IS_DEFAULT(NmethodSweepFraction)) { |
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1161
diff
changeset
|
3104 NmethodSweepFraction = 1; |
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1161
diff
changeset
|
3105 } |
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1161
diff
changeset
|
3106 } |
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1161
diff
changeset
|
3107 #endif |
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
parents:
1161
diff
changeset
|
3108 |
0 | 3109 if (PrintCommandLineFlags) { |
3110 CommandLineFlags::printSetFlags(); | |
3111 } | |
3112 | |
1681
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3113 // Apply CPU specific policy for the BiasedLocking |
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3114 if (UseBiasedLocking) { |
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3115 if (!VM_Version::use_biased_locking() && |
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3116 !(FLAG_IS_CMDLINE(UseBiasedLocking))) { |
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3117 UseBiasedLocking = false; |
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3118 } |
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3119 } |
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3120 |
0 | 3121 return JNI_OK; |
3122 } | |
3123 | |
3124 int Arguments::PropertyList_count(SystemProperty* pl) { | |
3125 int count = 0; | |
3126 while(pl != NULL) { | |
3127 count++; | |
3128 pl = pl->next(); | |
3129 } | |
3130 return count; | |
3131 } | |
3132 | |
3133 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) { | |
3134 assert(key != NULL, "just checking"); | |
3135 SystemProperty* prop; | |
3136 for (prop = pl; prop != NULL; prop = prop->next()) { | |
3137 if (strcmp(key, prop->key()) == 0) return prop->value(); | |
3138 } | |
3139 return NULL; | |
3140 } | |
3141 | |
3142 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) { | |
3143 int count = 0; | |
3144 const char* ret_val = NULL; | |
3145 | |
3146 while(pl != NULL) { | |
3147 if(count >= index) { | |
3148 ret_val = pl->key(); | |
3149 break; | |
3150 } | |
3151 count++; | |
3152 pl = pl->next(); | |
3153 } | |
3154 | |
3155 return ret_val; | |
3156 } | |
3157 | |
3158 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) { | |
3159 int count = 0; | |
3160 char* ret_val = NULL; | |
3161 | |
3162 while(pl != NULL) { | |
3163 if(count >= index) { | |
3164 ret_val = pl->value(); | |
3165 break; | |
3166 } | |
3167 count++; | |
3168 pl = pl->next(); | |
3169 } | |
3170 | |
3171 return ret_val; | |
3172 } | |
3173 | |
3174 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) { | |
3175 SystemProperty* p = *plist; | |
3176 if (p == NULL) { | |
3177 *plist = new_p; | |
3178 } else { | |
3179 while (p->next() != NULL) { | |
3180 p = p->next(); | |
3181 } | |
3182 p->set_next(new_p); | |
3183 } | |
3184 } | |
3185 | |
3186 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, char* v) { | |
3187 if (plist == NULL) | |
3188 return; | |
3189 | |
3190 SystemProperty* new_p = new SystemProperty(k, v, true); | |
3191 PropertyList_add(plist, new_p); | |
3192 } | |
3193 | |
3194 // This add maintains unique property key in the list. | |
691 | 3195 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, char* v, jboolean append) { |
0 | 3196 if (plist == NULL) |
3197 return; | |
3198 | |
3199 // If property key exist then update with new value. | |
3200 SystemProperty* prop; | |
3201 for (prop = *plist; prop != NULL; prop = prop->next()) { | |
3202 if (strcmp(k, prop->key()) == 0) { | |
691 | 3203 if (append) { |
3204 prop->append_value(v); | |
3205 } else { | |
3206 prop->set_value(v); | |
3207 } | |
0 | 3208 return; |
3209 } | |
3210 } | |
3211 | |
3212 PropertyList_add(plist, k, v); | |
3213 } | |
3214 | |
3215 #ifdef KERNEL | |
3216 char *Arguments::get_kernel_properties() { | |
3217 // Find properties starting with kernel and append them to string | |
3218 // We need to find out how long they are first because the URL's that they | |
3219 // might point to could get long. | |
3220 int length = 0; | |
3221 SystemProperty* prop; | |
3222 for (prop = _system_properties; prop != NULL; prop = prop->next()) { | |
3223 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { | |
3224 length += (strlen(prop->key()) + strlen(prop->value()) + 5); // "-D =" | |
3225 } | |
3226 } | |
3227 // Add one for null terminator. | |
3228 char *props = AllocateHeap(length + 1, "get_kernel_properties"); | |
3229 if (length != 0) { | |
3230 int pos = 0; | |
3231 for (prop = _system_properties; prop != NULL; prop = prop->next()) { | |
3232 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { | |
3233 jio_snprintf(&props[pos], length-pos, | |
3234 "-D%s=%s ", prop->key(), prop->value()); | |
3235 pos = strlen(props); | |
3236 } | |
3237 } | |
3238 } | |
3239 // null terminate props in case of null | |
3240 props[length] = '\0'; | |
3241 return props; | |
3242 } | |
3243 #endif // KERNEL | |
3244 | |
3245 // Copies src into buf, replacing "%%" with "%" and "%p" with pid | |
3246 // Returns true if all of the source pointed by src has been copied over to | |
3247 // the destination buffer pointed by buf. Otherwise, returns false. | |
3248 // Notes: | |
3249 // 1. If the length (buflen) of the destination buffer excluding the | |
3250 // NULL terminator character is not long enough for holding the expanded | |
3251 // pid characters, it also returns false instead of returning the partially | |
3252 // expanded one. | |
3253 // 2. The passed in "buflen" should be large enough to hold the null terminator. | |
3254 bool Arguments::copy_expand_pid(const char* src, size_t srclen, | |
3255 char* buf, size_t buflen) { | |
3256 const char* p = src; | |
3257 char* b = buf; | |
3258 const char* src_end = &src[srclen]; | |
3259 char* buf_end = &buf[buflen - 1]; | |
3260 | |
3261 while (p < src_end && b < buf_end) { | |
3262 if (*p == '%') { | |
3263 switch (*(++p)) { | |
3264 case '%': // "%%" ==> "%" | |
3265 *b++ = *p++; | |
3266 break; | |
3267 case 'p': { // "%p" ==> current process id | |
3268 // buf_end points to the character before the last character so | |
3269 // that we could write '\0' to the end of the buffer. | |
3270 size_t buf_sz = buf_end - b + 1; | |
3271 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id()); | |
3272 | |
3273 // if jio_snprintf fails or the buffer is not long enough to hold | |
3274 // the expanded pid, returns false. | |
3275 if (ret < 0 || ret >= (int)buf_sz) { | |
3276 return false; | |
3277 } else { | |
3278 b += ret; | |
3279 assert(*b == '\0', "fail in copy_expand_pid"); | |
3280 if (p == src_end && b == buf_end + 1) { | |
3281 // reach the end of the buffer. | |
3282 return true; | |
3283 } | |
3284 } | |
3285 p++; | |
3286 break; | |
3287 } | |
3288 default : | |
3289 *b++ = '%'; | |
3290 } | |
3291 } else { | |
3292 *b++ = *p++; | |
3293 } | |
3294 } | |
3295 *b = '\0'; | |
3296 return (p == src_end); // return false if not all of the source was copied | |
3297 } |