Mercurial > hg > truffle
annotate src/share/vm/runtime/arguments.cpp @ 2366:1fb790245268
6820066: Check that -XX:ParGCArrayScanChunk has a value larger than zero.
Summary: Check that -XX:ParGCArrayScanChunk has a value larger than zero.
Reviewed-by: johnc, jmasa, ysr
author | jwilhelm |
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date | Fri, 11 Mar 2011 16:35:18 +0100 |
parents | a2c2eac1ca62 |
children | dde920245681 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/javaAssertions.hpp" | |
27 #include "compiler/compilerOracle.hpp" | |
28 #include "memory/allocation.inline.hpp" | |
29 #include "memory/cardTableRS.hpp" | |
30 #include "memory/referenceProcessor.hpp" | |
31 #include "memory/universe.inline.hpp" | |
32 #include "oops/oop.inline.hpp" | |
33 #include "prims/jvmtiExport.hpp" | |
34 #include "runtime/arguments.hpp" | |
35 #include "runtime/globals_extension.hpp" | |
36 #include "runtime/java.hpp" | |
37 #include "services/management.hpp" | |
38 #include "utilities/defaultStream.hpp" | |
39 #include "utilities/taskqueue.hpp" | |
40 #ifdef TARGET_ARCH_x86 | |
41 # include "vm_version_x86.hpp" | |
42 #endif | |
43 #ifdef TARGET_ARCH_sparc | |
44 # include "vm_version_sparc.hpp" | |
45 #endif | |
46 #ifdef TARGET_ARCH_zero | |
47 # include "vm_version_zero.hpp" | |
48 #endif | |
49 #ifdef TARGET_OS_FAMILY_linux | |
50 # include "os_linux.inline.hpp" | |
51 #endif | |
52 #ifdef TARGET_OS_FAMILY_solaris | |
53 # include "os_solaris.inline.hpp" | |
54 #endif | |
55 #ifdef TARGET_OS_FAMILY_windows | |
56 # include "os_windows.inline.hpp" | |
57 #endif | |
58 #ifndef SERIALGC | |
59 #include "gc_implementation/concurrentMarkSweep/compactibleFreeListSpace.hpp" | |
60 #endif | |
0 | 61 |
62 #define DEFAULT_VENDOR_URL_BUG "http://java.sun.com/webapps/bugreport/crash.jsp" | |
63 #define DEFAULT_JAVA_LAUNCHER "generic" | |
64 | |
65 char** Arguments::_jvm_flags_array = NULL; | |
66 int Arguments::_num_jvm_flags = 0; | |
67 char** Arguments::_jvm_args_array = NULL; | |
68 int Arguments::_num_jvm_args = 0; | |
69 char* Arguments::_java_command = NULL; | |
70 SystemProperty* Arguments::_system_properties = NULL; | |
71 const char* Arguments::_gc_log_filename = NULL; | |
72 bool Arguments::_has_profile = false; | |
73 bool Arguments::_has_alloc_profile = false; | |
74 uintx Arguments::_min_heap_size = 0; | |
75 Arguments::Mode Arguments::_mode = _mixed; | |
76 bool Arguments::_java_compiler = false; | |
77 bool Arguments::_xdebug_mode = false; | |
78 const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG; | |
79 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER; | |
80 int Arguments::_sun_java_launcher_pid = -1; | |
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81 bool Arguments::_created_by_gamma_launcher = false; |
0 | 82 |
83 // These parameters are reset in method parse_vm_init_args(JavaVMInitArgs*) | |
84 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; | |
85 bool Arguments::_UseOnStackReplacement = UseOnStackReplacement; | |
86 bool Arguments::_BackgroundCompilation = BackgroundCompilation; | |
87 bool Arguments::_ClipInlining = ClipInlining; | |
88 | |
89 char* Arguments::SharedArchivePath = NULL; | |
90 | |
91 AgentLibraryList Arguments::_libraryList; | |
92 AgentLibraryList Arguments::_agentList; | |
93 | |
94 abort_hook_t Arguments::_abort_hook = NULL; | |
95 exit_hook_t Arguments::_exit_hook = NULL; | |
96 vfprintf_hook_t Arguments::_vfprintf_hook = NULL; | |
97 | |
98 | |
99 SystemProperty *Arguments::_java_ext_dirs = NULL; | |
100 SystemProperty *Arguments::_java_endorsed_dirs = NULL; | |
101 SystemProperty *Arguments::_sun_boot_library_path = NULL; | |
102 SystemProperty *Arguments::_java_library_path = NULL; | |
103 SystemProperty *Arguments::_java_home = NULL; | |
104 SystemProperty *Arguments::_java_class_path = NULL; | |
105 SystemProperty *Arguments::_sun_boot_class_path = NULL; | |
106 | |
107 char* Arguments::_meta_index_path = NULL; | |
108 char* Arguments::_meta_index_dir = NULL; | |
109 | |
110 static bool force_client_mode = false; | |
111 | |
112 // Check if head of 'option' matches 'name', and sets 'tail' remaining part of option string | |
113 | |
114 static bool match_option(const JavaVMOption *option, const char* name, | |
115 const char** tail) { | |
116 int len = (int)strlen(name); | |
117 if (strncmp(option->optionString, name, len) == 0) { | |
118 *tail = option->optionString + len; | |
119 return true; | |
120 } else { | |
121 return false; | |
122 } | |
123 } | |
124 | |
125 static void logOption(const char* opt) { | |
126 if (PrintVMOptions) { | |
127 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt); | |
128 } | |
129 } | |
130 | |
131 // Process java launcher properties. | |
132 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) { | |
133 // See if sun.java.launcher or sun.java.launcher.pid is defined. | |
134 // Must do this before setting up other system properties, | |
135 // as some of them may depend on launcher type. | |
136 for (int index = 0; index < args->nOptions; index++) { | |
137 const JavaVMOption* option = args->options + index; | |
138 const char* tail; | |
139 | |
140 if (match_option(option, "-Dsun.java.launcher=", &tail)) { | |
141 process_java_launcher_argument(tail, option->extraInfo); | |
142 continue; | |
143 } | |
144 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) { | |
145 _sun_java_launcher_pid = atoi(tail); | |
146 continue; | |
147 } | |
148 } | |
149 } | |
150 | |
151 // Initialize system properties key and value. | |
152 void Arguments::init_system_properties() { | |
153 | |
154 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name", | |
155 "Java Virtual Machine Specification", false)); | |
156 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false)); | |
157 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false)); | |
158 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true)); | |
159 | |
160 // following are JVMTI agent writeable properties. | |
161 // Properties values are set to NULL and they are | |
162 // os specific they are initialized in os::init_system_properties_values(). | |
163 _java_ext_dirs = new SystemProperty("java.ext.dirs", NULL, true); | |
164 _java_endorsed_dirs = new SystemProperty("java.endorsed.dirs", NULL, true); | |
165 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true); | |
166 _java_library_path = new SystemProperty("java.library.path", NULL, true); | |
167 _java_home = new SystemProperty("java.home", NULL, true); | |
168 _sun_boot_class_path = new SystemProperty("sun.boot.class.path", NULL, true); | |
169 | |
170 _java_class_path = new SystemProperty("java.class.path", "", true); | |
171 | |
172 // Add to System Property list. | |
173 PropertyList_add(&_system_properties, _java_ext_dirs); | |
174 PropertyList_add(&_system_properties, _java_endorsed_dirs); | |
175 PropertyList_add(&_system_properties, _sun_boot_library_path); | |
176 PropertyList_add(&_system_properties, _java_library_path); | |
177 PropertyList_add(&_system_properties, _java_home); | |
178 PropertyList_add(&_system_properties, _java_class_path); | |
179 PropertyList_add(&_system_properties, _sun_boot_class_path); | |
180 | |
181 // Set OS specific system properties values | |
182 os::init_system_properties_values(); | |
183 } | |
184 | |
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185 |
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186 // Update/Initialize System properties after JDK version number is known |
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187 void Arguments::init_version_specific_system_properties() { |
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188 enum { bufsz = 16 }; |
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189 char buffer[bufsz]; |
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190 const char* spec_vendor = "Sun Microsystems Inc."; |
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191 uint32_t spec_version = 0; |
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192 |
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193 if (JDK_Version::is_gte_jdk17x_version()) { |
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194 spec_vendor = "Oracle Corporation"; |
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195 spec_version = JDK_Version::current().major_version(); |
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196 } |
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197 jio_snprintf(buffer, bufsz, "1." UINT32_FORMAT, spec_version); |
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198 |
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199 PropertyList_add(&_system_properties, |
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200 new SystemProperty("java.vm.specification.vendor", spec_vendor, false)); |
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201 PropertyList_add(&_system_properties, |
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202 new SystemProperty("java.vm.specification.version", buffer, false)); |
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203 PropertyList_add(&_system_properties, |
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204 new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false)); |
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205 } |
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206 |
242 | 207 /** |
208 * Provide a slightly more user-friendly way of eliminating -XX flags. | |
209 * When a flag is eliminated, it can be added to this list in order to | |
210 * continue accepting this flag on the command-line, while issuing a warning | |
211 * and ignoring the value. Once the JDK version reaches the 'accept_until' | |
212 * limit, we flatly refuse to admit the existence of the flag. This allows | |
213 * a flag to die correctly over JDK releases using HSX. | |
214 */ | |
215 typedef struct { | |
216 const char* name; | |
217 JDK_Version obsoleted_in; // when the flag went away | |
218 JDK_Version accept_until; // which version to start denying the existence | |
219 } ObsoleteFlag; | |
0 | 220 |
242 | 221 static ObsoleteFlag obsolete_jvm_flags[] = { |
222 { "UseTrainGC", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
223 { "UseSpecialLargeObjectHandling", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
224 { "UseOversizedCarHandling", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
225 { "TraceCarAllocation", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
226 { "PrintTrainGCProcessingStats", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
227 { "LogOfCarSpaceSize", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
228 { "OversizedCarThreshold", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
229 { "MinTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
230 { "DefaultTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
231 { "MaxTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
232 { "DelayTickAdjustment", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
233 { "ProcessingToTenuringRatio", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
234 { "MinTrainLength", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
235 { "AppendRatio", JDK_Version::jdk_update(6,10), JDK_Version::jdk(7) }, | |
1064 | 236 { "DefaultMaxRAM", JDK_Version::jdk_update(6,18), JDK_Version::jdk(7) }, |
237 { "DefaultInitialRAMFraction", | |
238 JDK_Version::jdk_update(6,18), JDK_Version::jdk(7) }, | |
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239 { "UseDepthFirstScavengeOrder", |
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240 JDK_Version::jdk_update(6,22), JDK_Version::jdk(7) }, |
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241 { "HandlePromotionFailure", |
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242 JDK_Version::jdk_update(6,24), JDK_Version::jdk(8) }, |
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243 { "MaxLiveObjectEvacuationRatio", |
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244 JDK_Version::jdk_update(6,24), JDK_Version::jdk(8) }, |
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245 { "ForceSharedSpaces", JDK_Version::jdk_update(6,25), JDK_Version::jdk(8) }, |
242 | 246 { NULL, JDK_Version(0), JDK_Version(0) } |
247 }; | |
248 | |
249 // Returns true if the flag is obsolete and fits into the range specified | |
250 // for being ignored. In the case that the flag is ignored, the 'version' | |
251 // value is filled in with the version number when the flag became | |
252 // obsolete so that that value can be displayed to the user. | |
253 bool Arguments::is_newly_obsolete(const char *s, JDK_Version* version) { | |
0 | 254 int i = 0; |
242 | 255 assert(version != NULL, "Must provide a version buffer"); |
256 while (obsolete_jvm_flags[i].name != NULL) { | |
257 const ObsoleteFlag& flag_status = obsolete_jvm_flags[i]; | |
0 | 258 // <flag>=xxx form |
259 // [-|+]<flag> form | |
242 | 260 if ((strncmp(flag_status.name, s, strlen(flag_status.name)) == 0) || |
0 | 261 ((s[0] == '+' || s[0] == '-') && |
242 | 262 (strncmp(flag_status.name, &s[1], strlen(flag_status.name)) == 0))) { |
263 if (JDK_Version::current().compare(flag_status.accept_until) == -1) { | |
264 *version = flag_status.obsoleted_in; | |
265 return true; | |
266 } | |
0 | 267 } |
268 i++; | |
269 } | |
270 return false; | |
271 } | |
272 | |
273 // Constructs the system class path (aka boot class path) from the following | |
274 // components, in order: | |
275 // | |
276 // prefix // from -Xbootclasspath/p:... | |
277 // endorsed // the expansion of -Djava.endorsed.dirs=... | |
278 // base // from os::get_system_properties() or -Xbootclasspath= | |
279 // suffix // from -Xbootclasspath/a:... | |
280 // | |
281 // java.endorsed.dirs is a list of directories; any jar or zip files in the | |
282 // directories are added to the sysclasspath just before the base. | |
283 // | |
284 // This could be AllStatic, but it isn't needed after argument processing is | |
285 // complete. | |
286 class SysClassPath: public StackObj { | |
287 public: | |
288 SysClassPath(const char* base); | |
289 ~SysClassPath(); | |
290 | |
291 inline void set_base(const char* base); | |
292 inline void add_prefix(const char* prefix); | |
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293 inline void add_suffix_to_prefix(const char* suffix); |
0 | 294 inline void add_suffix(const char* suffix); |
295 inline void reset_path(const char* base); | |
296 | |
297 // Expand the jar/zip files in each directory listed by the java.endorsed.dirs | |
298 // property. Must be called after all command-line arguments have been | |
299 // processed (in particular, -Djava.endorsed.dirs=...) and before calling | |
300 // combined_path(). | |
301 void expand_endorsed(); | |
302 | |
303 inline const char* get_base() const { return _items[_scp_base]; } | |
304 inline const char* get_prefix() const { return _items[_scp_prefix]; } | |
305 inline const char* get_suffix() const { return _items[_scp_suffix]; } | |
306 inline const char* get_endorsed() const { return _items[_scp_endorsed]; } | |
307 | |
308 // Combine all the components into a single c-heap-allocated string; caller | |
309 // must free the string if/when no longer needed. | |
310 char* combined_path(); | |
311 | |
312 private: | |
313 // Utility routines. | |
314 static char* add_to_path(const char* path, const char* str, bool prepend); | |
315 static char* add_jars_to_path(char* path, const char* directory); | |
316 | |
317 inline void reset_item_at(int index); | |
318 | |
319 // Array indices for the items that make up the sysclasspath. All except the | |
320 // base are allocated in the C heap and freed by this class. | |
321 enum { | |
322 _scp_prefix, // from -Xbootclasspath/p:... | |
323 _scp_endorsed, // the expansion of -Djava.endorsed.dirs=... | |
324 _scp_base, // the default sysclasspath | |
325 _scp_suffix, // from -Xbootclasspath/a:... | |
326 _scp_nitems // the number of items, must be last. | |
327 }; | |
328 | |
329 const char* _items[_scp_nitems]; | |
330 DEBUG_ONLY(bool _expansion_done;) | |
331 }; | |
332 | |
333 SysClassPath::SysClassPath(const char* base) { | |
334 memset(_items, 0, sizeof(_items)); | |
335 _items[_scp_base] = base; | |
336 DEBUG_ONLY(_expansion_done = false;) | |
337 } | |
338 | |
339 SysClassPath::~SysClassPath() { | |
340 // Free everything except the base. | |
341 for (int i = 0; i < _scp_nitems; ++i) { | |
342 if (i != _scp_base) reset_item_at(i); | |
343 } | |
344 DEBUG_ONLY(_expansion_done = false;) | |
345 } | |
346 | |
347 inline void SysClassPath::set_base(const char* base) { | |
348 _items[_scp_base] = base; | |
349 } | |
350 | |
351 inline void SysClassPath::add_prefix(const char* prefix) { | |
352 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], prefix, true); | |
353 } | |
354 | |
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355 inline void SysClassPath::add_suffix_to_prefix(const char* suffix) { |
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356 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], suffix, false); |
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357 } |
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358 |
0 | 359 inline void SysClassPath::add_suffix(const char* suffix) { |
360 _items[_scp_suffix] = add_to_path(_items[_scp_suffix], suffix, false); | |
361 } | |
362 | |
363 inline void SysClassPath::reset_item_at(int index) { | |
364 assert(index < _scp_nitems && index != _scp_base, "just checking"); | |
365 if (_items[index] != NULL) { | |
366 FREE_C_HEAP_ARRAY(char, _items[index]); | |
367 _items[index] = NULL; | |
368 } | |
369 } | |
370 | |
371 inline void SysClassPath::reset_path(const char* base) { | |
372 // Clear the prefix and suffix. | |
373 reset_item_at(_scp_prefix); | |
374 reset_item_at(_scp_suffix); | |
375 set_base(base); | |
376 } | |
377 | |
378 //------------------------------------------------------------------------------ | |
379 | |
380 void SysClassPath::expand_endorsed() { | |
381 assert(_items[_scp_endorsed] == NULL, "can only be called once."); | |
382 | |
383 const char* path = Arguments::get_property("java.endorsed.dirs"); | |
384 if (path == NULL) { | |
385 path = Arguments::get_endorsed_dir(); | |
386 assert(path != NULL, "no default for java.endorsed.dirs"); | |
387 } | |
388 | |
389 char* expanded_path = NULL; | |
390 const char separator = *os::path_separator(); | |
391 const char* const end = path + strlen(path); | |
392 while (path < end) { | |
393 const char* tmp_end = strchr(path, separator); | |
394 if (tmp_end == NULL) { | |
395 expanded_path = add_jars_to_path(expanded_path, path); | |
396 path = end; | |
397 } else { | |
398 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1); | |
399 memcpy(dirpath, path, tmp_end - path); | |
400 dirpath[tmp_end - path] = '\0'; | |
401 expanded_path = add_jars_to_path(expanded_path, dirpath); | |
402 FREE_C_HEAP_ARRAY(char, dirpath); | |
403 path = tmp_end + 1; | |
404 } | |
405 } | |
406 _items[_scp_endorsed] = expanded_path; | |
407 DEBUG_ONLY(_expansion_done = true;) | |
408 } | |
409 | |
410 // Combine the bootclasspath elements, some of which may be null, into a single | |
411 // c-heap-allocated string. | |
412 char* SysClassPath::combined_path() { | |
413 assert(_items[_scp_base] != NULL, "empty default sysclasspath"); | |
414 assert(_expansion_done, "must call expand_endorsed() first."); | |
415 | |
416 size_t lengths[_scp_nitems]; | |
417 size_t total_len = 0; | |
418 | |
419 const char separator = *os::path_separator(); | |
420 | |
421 // Get the lengths. | |
422 int i; | |
423 for (i = 0; i < _scp_nitems; ++i) { | |
424 if (_items[i] != NULL) { | |
425 lengths[i] = strlen(_items[i]); | |
426 // Include space for the separator char (or a NULL for the last item). | |
427 total_len += lengths[i] + 1; | |
428 } | |
429 } | |
430 assert(total_len > 0, "empty sysclasspath not allowed"); | |
431 | |
432 // Copy the _items to a single string. | |
433 char* cp = NEW_C_HEAP_ARRAY(char, total_len); | |
434 char* cp_tmp = cp; | |
435 for (i = 0; i < _scp_nitems; ++i) { | |
436 if (_items[i] != NULL) { | |
437 memcpy(cp_tmp, _items[i], lengths[i]); | |
438 cp_tmp += lengths[i]; | |
439 *cp_tmp++ = separator; | |
440 } | |
441 } | |
442 *--cp_tmp = '\0'; // Replace the extra separator. | |
443 return cp; | |
444 } | |
445 | |
446 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null. | |
447 char* | |
448 SysClassPath::add_to_path(const char* path, const char* str, bool prepend) { | |
449 char *cp; | |
450 | |
451 assert(str != NULL, "just checking"); | |
452 if (path == NULL) { | |
453 size_t len = strlen(str) + 1; | |
454 cp = NEW_C_HEAP_ARRAY(char, len); | |
455 memcpy(cp, str, len); // copy the trailing null | |
456 } else { | |
457 const char separator = *os::path_separator(); | |
458 size_t old_len = strlen(path); | |
459 size_t str_len = strlen(str); | |
460 size_t len = old_len + str_len + 2; | |
461 | |
462 if (prepend) { | |
463 cp = NEW_C_HEAP_ARRAY(char, len); | |
464 char* cp_tmp = cp; | |
465 memcpy(cp_tmp, str, str_len); | |
466 cp_tmp += str_len; | |
467 *cp_tmp = separator; | |
468 memcpy(++cp_tmp, path, old_len + 1); // copy the trailing null | |
469 FREE_C_HEAP_ARRAY(char, path); | |
470 } else { | |
471 cp = REALLOC_C_HEAP_ARRAY(char, path, len); | |
472 char* cp_tmp = cp + old_len; | |
473 *cp_tmp = separator; | |
474 memcpy(++cp_tmp, str, str_len + 1); // copy the trailing null | |
475 } | |
476 } | |
477 return cp; | |
478 } | |
479 | |
480 // Scan the directory and append any jar or zip files found to path. | |
481 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null. | |
482 char* SysClassPath::add_jars_to_path(char* path, const char* directory) { | |
483 DIR* dir = os::opendir(directory); | |
484 if (dir == NULL) return path; | |
485 | |
486 char dir_sep[2] = { '\0', '\0' }; | |
487 size_t directory_len = strlen(directory); | |
488 const char fileSep = *os::file_separator(); | |
489 if (directory[directory_len - 1] != fileSep) dir_sep[0] = fileSep; | |
490 | |
491 /* Scan the directory for jars/zips, appending them to path. */ | |
492 struct dirent *entry; | |
493 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory)); | |
494 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL) { | |
495 const char* name = entry->d_name; | |
496 const char* ext = name + strlen(name) - 4; | |
497 bool isJarOrZip = ext > name && | |
498 (os::file_name_strcmp(ext, ".jar") == 0 || | |
499 os::file_name_strcmp(ext, ".zip") == 0); | |
500 if (isJarOrZip) { | |
501 char* jarpath = NEW_C_HEAP_ARRAY(char, directory_len + 2 + strlen(name)); | |
502 sprintf(jarpath, "%s%s%s", directory, dir_sep, name); | |
503 path = add_to_path(path, jarpath, false); | |
504 FREE_C_HEAP_ARRAY(char, jarpath); | |
505 } | |
506 } | |
507 FREE_C_HEAP_ARRAY(char, dbuf); | |
508 os::closedir(dir); | |
509 return path; | |
510 } | |
511 | |
512 // Parses a memory size specification string. | |
489
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513 static bool atomull(const char *s, julong* result) { |
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514 julong n = 0; |
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515 int args_read = sscanf(s, os::julong_format_specifier(), &n); |
0 | 516 if (args_read != 1) { |
517 return false; | |
518 } | |
519 while (*s != '\0' && isdigit(*s)) { | |
520 s++; | |
521 } | |
522 // 4705540: illegal if more characters are found after the first non-digit | |
523 if (strlen(s) > 1) { | |
524 return false; | |
525 } | |
526 switch (*s) { | |
527 case 'T': case 't': | |
528 *result = n * G * K; | |
489
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529 // Check for overflow. |
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530 if (*result/((julong)G * K) != n) return false; |
0 | 531 return true; |
532 case 'G': case 'g': | |
533 *result = n * G; | |
489
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534 if (*result/G != n) return false; |
0 | 535 return true; |
536 case 'M': case 'm': | |
537 *result = n * M; | |
489
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538 if (*result/M != n) return false; |
0 | 539 return true; |
540 case 'K': case 'k': | |
541 *result = n * K; | |
489
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542 if (*result/K != n) return false; |
0 | 543 return true; |
544 case '\0': | |
545 *result = n; | |
546 return true; | |
547 default: | |
548 return false; | |
549 } | |
550 } | |
551 | |
489
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552 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size) { |
0 | 553 if (size < min_size) return arg_too_small; |
554 // Check that size will fit in a size_t (only relevant on 32-bit) | |
489
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555 if (size > max_uintx) return arg_too_big; |
0 | 556 return arg_in_range; |
557 } | |
558 | |
559 // Describe an argument out of range error | |
560 void Arguments::describe_range_error(ArgsRange errcode) { | |
561 switch(errcode) { | |
562 case arg_too_big: | |
563 jio_fprintf(defaultStream::error_stream(), | |
564 "The specified size exceeds the maximum " | |
565 "representable size.\n"); | |
566 break; | |
567 case arg_too_small: | |
568 case arg_unreadable: | |
569 case arg_in_range: | |
570 // do nothing for now | |
571 break; | |
572 default: | |
573 ShouldNotReachHere(); | |
574 } | |
575 } | |
576 | |
577 static bool set_bool_flag(char* name, bool value, FlagValueOrigin origin) { | |
578 return CommandLineFlags::boolAtPut(name, &value, origin); | |
579 } | |
580 | |
581 static bool set_fp_numeric_flag(char* name, char* value, FlagValueOrigin origin) { | |
582 double v; | |
583 if (sscanf(value, "%lf", &v) != 1) { | |
584 return false; | |
585 } | |
586 | |
587 if (CommandLineFlags::doubleAtPut(name, &v, origin)) { | |
588 return true; | |
589 } | |
590 return false; | |
591 } | |
592 | |
593 static bool set_numeric_flag(char* name, char* value, FlagValueOrigin origin) { | |
489
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594 julong v; |
0 | 595 intx intx_v; |
596 bool is_neg = false; | |
489
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597 // Check the sign first since atomull() parses only unsigned values. |
0 | 598 if (*value == '-') { |
599 if (!CommandLineFlags::intxAt(name, &intx_v)) { | |
600 return false; | |
601 } | |
602 value++; | |
603 is_neg = true; | |
604 } | |
489
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605 if (!atomull(value, &v)) { |
0 | 606 return false; |
607 } | |
608 intx_v = (intx) v; | |
609 if (is_neg) { | |
610 intx_v = -intx_v; | |
611 } | |
612 if (CommandLineFlags::intxAtPut(name, &intx_v, origin)) { | |
613 return true; | |
614 } | |
615 uintx uintx_v = (uintx) v; | |
616 if (!is_neg && CommandLineFlags::uintxAtPut(name, &uintx_v, origin)) { | |
617 return true; | |
618 } | |
1064 | 619 uint64_t uint64_t_v = (uint64_t) v; |
620 if (!is_neg && CommandLineFlags::uint64_tAtPut(name, &uint64_t_v, origin)) { | |
621 return true; | |
622 } | |
0 | 623 return false; |
624 } | |
625 | |
626 static bool set_string_flag(char* name, const char* value, FlagValueOrigin origin) { | |
627 if (!CommandLineFlags::ccstrAtPut(name, &value, origin)) return false; | |
628 // Contract: CommandLineFlags always returns a pointer that needs freeing. | |
629 FREE_C_HEAP_ARRAY(char, value); | |
630 return true; | |
631 } | |
632 | |
633 static bool append_to_string_flag(char* name, const char* new_value, FlagValueOrigin origin) { | |
634 const char* old_value = ""; | |
635 if (!CommandLineFlags::ccstrAt(name, &old_value)) return false; | |
636 size_t old_len = old_value != NULL ? strlen(old_value) : 0; | |
637 size_t new_len = strlen(new_value); | |
638 const char* value; | |
639 char* free_this_too = NULL; | |
640 if (old_len == 0) { | |
641 value = new_value; | |
642 } else if (new_len == 0) { | |
643 value = old_value; | |
644 } else { | |
645 char* buf = NEW_C_HEAP_ARRAY(char, old_len + 1 + new_len + 1); | |
646 // each new setting adds another LINE to the switch: | |
647 sprintf(buf, "%s\n%s", old_value, new_value); | |
648 value = buf; | |
649 free_this_too = buf; | |
650 } | |
651 (void) CommandLineFlags::ccstrAtPut(name, &value, origin); | |
652 // CommandLineFlags always returns a pointer that needs freeing. | |
653 FREE_C_HEAP_ARRAY(char, value); | |
654 if (free_this_too != NULL) { | |
655 // CommandLineFlags made its own copy, so I must delete my own temp. buffer. | |
656 FREE_C_HEAP_ARRAY(char, free_this_too); | |
657 } | |
658 return true; | |
659 } | |
660 | |
661 bool Arguments::parse_argument(const char* arg, FlagValueOrigin origin) { | |
662 | |
663 // range of acceptable characters spelled out for portability reasons | |
664 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]" | |
665 #define BUFLEN 255 | |
666 char name[BUFLEN+1]; | |
667 char dummy; | |
668 | |
669 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { | |
670 return set_bool_flag(name, false, origin); | |
671 } | |
672 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { | |
673 return set_bool_flag(name, true, origin); | |
674 } | |
675 | |
676 char punct; | |
677 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') { | |
678 const char* value = strchr(arg, '=') + 1; | |
679 Flag* flag = Flag::find_flag(name, strlen(name)); | |
680 if (flag != NULL && flag->is_ccstr()) { | |
681 if (flag->ccstr_accumulates()) { | |
682 return append_to_string_flag(name, value, origin); | |
683 } else { | |
684 if (value[0] == '\0') { | |
685 value = NULL; | |
686 } | |
687 return set_string_flag(name, value, origin); | |
688 } | |
689 } | |
690 } | |
691 | |
692 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') { | |
693 const char* value = strchr(arg, '=') + 1; | |
694 // -XX:Foo:=xxx will reset the string flag to the given value. | |
695 if (value[0] == '\0') { | |
696 value = NULL; | |
697 } | |
698 return set_string_flag(name, value, origin); | |
699 } | |
700 | |
701 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.]" | |
702 #define SIGNED_NUMBER_RANGE "[-0123456789]" | |
703 #define NUMBER_RANGE "[0123456789]" | |
704 char value[BUFLEN + 1]; | |
705 char value2[BUFLEN + 1]; | |
706 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) { | |
707 // Looks like a floating-point number -- try again with more lenient format string | |
708 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) { | |
709 return set_fp_numeric_flag(name, value, origin); | |
710 } | |
711 } | |
712 | |
713 #define VALUE_RANGE "[-kmgtKMGT0123456789]" | |
714 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) { | |
715 return set_numeric_flag(name, value, origin); | |
716 } | |
717 | |
718 return false; | |
719 } | |
720 | |
721 void Arguments::add_string(char*** bldarray, int* count, const char* arg) { | |
722 assert(bldarray != NULL, "illegal argument"); | |
723 | |
724 if (arg == NULL) { | |
725 return; | |
726 } | |
727 | |
728 int index = *count; | |
729 | |
730 // expand the array and add arg to the last element | |
731 (*count)++; | |
732 if (*bldarray == NULL) { | |
733 *bldarray = NEW_C_HEAP_ARRAY(char*, *count); | |
734 } else { | |
735 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, *count); | |
736 } | |
737 (*bldarray)[index] = strdup(arg); | |
738 } | |
739 | |
740 void Arguments::build_jvm_args(const char* arg) { | |
741 add_string(&_jvm_args_array, &_num_jvm_args, arg); | |
742 } | |
743 | |
744 void Arguments::build_jvm_flags(const char* arg) { | |
745 add_string(&_jvm_flags_array, &_num_jvm_flags, arg); | |
746 } | |
747 | |
748 // utility function to return a string that concatenates all | |
749 // strings in a given char** array | |
750 const char* Arguments::build_resource_string(char** args, int count) { | |
751 if (args == NULL || count == 0) { | |
752 return NULL; | |
753 } | |
754 size_t length = strlen(args[0]) + 1; // add 1 for the null terminator | |
755 for (int i = 1; i < count; i++) { | |
756 length += strlen(args[i]) + 1; // add 1 for a space | |
757 } | |
758 char* s = NEW_RESOURCE_ARRAY(char, length); | |
759 strcpy(s, args[0]); | |
760 for (int j = 1; j < count; j++) { | |
761 strcat(s, " "); | |
762 strcat(s, args[j]); | |
763 } | |
764 return (const char*) s; | |
765 } | |
766 | |
767 void Arguments::print_on(outputStream* st) { | |
768 st->print_cr("VM Arguments:"); | |
769 if (num_jvm_flags() > 0) { | |
770 st->print("jvm_flags: "); print_jvm_flags_on(st); | |
771 } | |
772 if (num_jvm_args() > 0) { | |
773 st->print("jvm_args: "); print_jvm_args_on(st); | |
774 } | |
775 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>"); | |
776 st->print_cr("Launcher Type: %s", _sun_java_launcher); | |
777 } | |
778 | |
779 void Arguments::print_jvm_flags_on(outputStream* st) { | |
780 if (_num_jvm_flags > 0) { | |
781 for (int i=0; i < _num_jvm_flags; i++) { | |
782 st->print("%s ", _jvm_flags_array[i]); | |
783 } | |
784 st->print_cr(""); | |
785 } | |
786 } | |
787 | |
788 void Arguments::print_jvm_args_on(outputStream* st) { | |
789 if (_num_jvm_args > 0) { | |
790 for (int i=0; i < _num_jvm_args; i++) { | |
791 st->print("%s ", _jvm_args_array[i]); | |
792 } | |
793 st->print_cr(""); | |
794 } | |
795 } | |
796 | |
242 | 797 bool Arguments::process_argument(const char* arg, |
798 jboolean ignore_unrecognized, FlagValueOrigin origin) { | |
799 | |
800 JDK_Version since = JDK_Version(); | |
0 | 801 |
802 if (parse_argument(arg, origin)) { | |
803 // do nothing | |
242 | 804 } else if (is_newly_obsolete(arg, &since)) { |
805 enum { bufsize = 256 }; | |
806 char buffer[bufsize]; | |
807 since.to_string(buffer, bufsize); | |
0 | 808 jio_fprintf(defaultStream::error_stream(), |
242 | 809 "Warning: The flag %s has been EOL'd as of %s and will" |
810 " be ignored\n", arg, buffer); | |
0 | 811 } else { |
812 if (!ignore_unrecognized) { | |
813 jio_fprintf(defaultStream::error_stream(), | |
814 "Unrecognized VM option '%s'\n", arg); | |
815 // allow for commandline "commenting out" options like -XX:#+Verbose | |
816 if (strlen(arg) == 0 || arg[0] != '#') { | |
817 return false; | |
818 } | |
819 } | |
820 } | |
821 return true; | |
822 } | |
823 | |
824 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) { | |
825 FILE* stream = fopen(file_name, "rb"); | |
826 if (stream == NULL) { | |
827 if (should_exist) { | |
828 jio_fprintf(defaultStream::error_stream(), | |
829 "Could not open settings file %s\n", file_name); | |
830 return false; | |
831 } else { | |
832 return true; | |
833 } | |
834 } | |
835 | |
836 char token[1024]; | |
837 int pos = 0; | |
838 | |
839 bool in_white_space = true; | |
840 bool in_comment = false; | |
841 bool in_quote = false; | |
842 char quote_c = 0; | |
843 bool result = true; | |
844 | |
845 int c = getc(stream); | |
846 while(c != EOF) { | |
847 if (in_white_space) { | |
848 if (in_comment) { | |
849 if (c == '\n') in_comment = false; | |
850 } else { | |
851 if (c == '#') in_comment = true; | |
852 else if (!isspace(c)) { | |
853 in_white_space = false; | |
854 token[pos++] = c; | |
855 } | |
856 } | |
857 } else { | |
858 if (c == '\n' || (!in_quote && isspace(c))) { | |
859 // token ends at newline, or at unquoted whitespace | |
860 // this allows a way to include spaces in string-valued options | |
861 token[pos] = '\0'; | |
862 logOption(token); | |
863 result &= process_argument(token, ignore_unrecognized, CONFIG_FILE); | |
864 build_jvm_flags(token); | |
865 pos = 0; | |
866 in_white_space = true; | |
867 in_quote = false; | |
868 } else if (!in_quote && (c == '\'' || c == '"')) { | |
869 in_quote = true; | |
870 quote_c = c; | |
871 } else if (in_quote && (c == quote_c)) { | |
872 in_quote = false; | |
873 } else { | |
874 token[pos++] = c; | |
875 } | |
876 } | |
877 c = getc(stream); | |
878 } | |
879 if (pos > 0) { | |
880 token[pos] = '\0'; | |
881 result &= process_argument(token, ignore_unrecognized, CONFIG_FILE); | |
882 build_jvm_flags(token); | |
883 } | |
884 fclose(stream); | |
885 return result; | |
886 } | |
887 | |
888 //============================================================================================================= | |
889 // Parsing of properties (-D) | |
890 | |
891 const char* Arguments::get_property(const char* key) { | |
892 return PropertyList_get_value(system_properties(), key); | |
893 } | |
894 | |
895 bool Arguments::add_property(const char* prop) { | |
896 const char* eq = strchr(prop, '='); | |
897 char* key; | |
898 // ns must be static--its address may be stored in a SystemProperty object. | |
899 const static char ns[1] = {0}; | |
900 char* value = (char *)ns; | |
901 | |
902 size_t key_len = (eq == NULL) ? strlen(prop) : (eq - prop); | |
903 key = AllocateHeap(key_len + 1, "add_property"); | |
904 strncpy(key, prop, key_len); | |
905 key[key_len] = '\0'; | |
906 | |
907 if (eq != NULL) { | |
908 size_t value_len = strlen(prop) - key_len - 1; | |
909 value = AllocateHeap(value_len + 1, "add_property"); | |
910 strncpy(value, &prop[key_len + 1], value_len + 1); | |
911 } | |
912 | |
913 if (strcmp(key, "java.compiler") == 0) { | |
914 process_java_compiler_argument(value); | |
915 FreeHeap(key); | |
916 if (eq != NULL) { | |
917 FreeHeap(value); | |
918 } | |
919 return true; | |
691 | 920 } else if (strcmp(key, "sun.java.command") == 0) { |
0 | 921 _java_command = value; |
922 | |
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923 // Record value in Arguments, but let it get passed to Java. |
691 | 924 } else if (strcmp(key, "sun.java.launcher.pid") == 0) { |
0 | 925 // launcher.pid property is private and is processed |
926 // in process_sun_java_launcher_properties(); | |
927 // the sun.java.launcher property is passed on to the java application | |
928 FreeHeap(key); | |
929 if (eq != NULL) { | |
930 FreeHeap(value); | |
931 } | |
932 return true; | |
691 | 933 } else if (strcmp(key, "java.vendor.url.bug") == 0) { |
0 | 934 // save it in _java_vendor_url_bug, so JVM fatal error handler can access |
935 // its value without going through the property list or making a Java call. | |
936 _java_vendor_url_bug = value; | |
691 | 937 } else if (strcmp(key, "sun.boot.library.path") == 0) { |
938 PropertyList_unique_add(&_system_properties, key, value, true); | |
939 return true; | |
0 | 940 } |
941 // Create new property and add at the end of the list | |
942 PropertyList_unique_add(&_system_properties, key, value); | |
943 return true; | |
944 } | |
945 | |
946 //=========================================================================================================== | |
947 // Setting int/mixed/comp mode flags | |
948 | |
949 void Arguments::set_mode_flags(Mode mode) { | |
950 // Set up default values for all flags. | |
951 // If you add a flag to any of the branches below, | |
952 // add a default value for it here. | |
953 set_java_compiler(false); | |
954 _mode = mode; | |
955 | |
956 // Ensure Agent_OnLoad has the correct initial values. | |
957 // This may not be the final mode; mode may change later in onload phase. | |
958 PropertyList_unique_add(&_system_properties, "java.vm.info", | |
691 | 959 (char*)Abstract_VM_Version::vm_info_string(), false); |
0 | 960 |
961 UseInterpreter = true; | |
962 UseCompiler = true; | |
963 UseLoopCounter = true; | |
964 | |
965 // Default values may be platform/compiler dependent - | |
966 // use the saved values | |
967 ClipInlining = Arguments::_ClipInlining; | |
968 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods; | |
969 UseOnStackReplacement = Arguments::_UseOnStackReplacement; | |
970 BackgroundCompilation = Arguments::_BackgroundCompilation; | |
971 | |
972 // Change from defaults based on mode | |
973 switch (mode) { | |
974 default: | |
975 ShouldNotReachHere(); | |
976 break; | |
977 case _int: | |
978 UseCompiler = false; | |
979 UseLoopCounter = false; | |
980 AlwaysCompileLoopMethods = false; | |
981 UseOnStackReplacement = false; | |
982 break; | |
983 case _mixed: | |
984 // same as default | |
985 break; | |
986 case _comp: | |
987 UseInterpreter = false; | |
988 BackgroundCompilation = false; | |
989 ClipInlining = false; | |
990 break; | |
991 } | |
992 } | |
993 | |
994 // Conflict: required to use shared spaces (-Xshare:on), but | |
995 // incompatible command line options were chosen. | |
996 | |
997 static void no_shared_spaces() { | |
998 if (RequireSharedSpaces) { | |
999 jio_fprintf(defaultStream::error_stream(), | |
1000 "Class data sharing is inconsistent with other specified options.\n"); | |
1001 vm_exit_during_initialization("Unable to use shared archive.", NULL); | |
1002 } else { | |
1003 FLAG_SET_DEFAULT(UseSharedSpaces, false); | |
1004 } | |
1005 } | |
1006 | |
1783 | 1007 void Arguments::set_tiered_flags() { |
1008 if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) { | |
1009 FLAG_SET_DEFAULT(CompilationPolicyChoice, 2); | |
1010 } | |
1011 if (CompilationPolicyChoice < 2) { | |
1012 vm_exit_during_initialization( | |
1013 "Incompatible compilation policy selected", NULL); | |
1014 } | |
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1015 // Increase the code cache size - tiered compiles a lot more. |
1783 | 1016 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) { |
1017 FLAG_SET_DEFAULT(ReservedCodeCacheSize, ReservedCodeCacheSize * 2); | |
1018 } | |
1019 } | |
1020 | |
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1021 #ifndef KERNEL |
0 | 1022 // If the user has chosen ParallelGCThreads > 0, we set UseParNewGC |
1023 // if it's not explictly set or unset. If the user has chosen | |
1024 // UseParNewGC and not explicitly set ParallelGCThreads we | |
1025 // set it, unless this is a single cpu machine. | |
1026 void Arguments::set_parnew_gc_flags() { | |
1064 | 1027 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC && !UseG1GC, |
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1028 "control point invariant"); |
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1029 assert(UseParNewGC, "Error"); |
0 | 1030 |
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1031 // Turn off AdaptiveSizePolicy by default for parnew until it is |
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1032 // complete. |
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1033 if (FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) { |
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1034 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); |
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1035 } |
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1036 |
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1037 if (ParallelGCThreads == 0) { |
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1038 FLAG_SET_DEFAULT(ParallelGCThreads, |
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1039 Abstract_VM_Version::parallel_worker_threads()); |
1064 | 1040 if (ParallelGCThreads == 1) { |
0 | 1041 FLAG_SET_DEFAULT(UseParNewGC, false); |
1064 | 1042 FLAG_SET_DEFAULT(ParallelGCThreads, 0); |
0 | 1043 } |
1044 } | |
1064 | 1045 if (UseParNewGC) { |
1046 // CDS doesn't work with ParNew yet | |
0 | 1047 no_shared_spaces(); |
1048 | |
695 | 1049 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 respectively, |
0 | 1050 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration |
1051 // we set them to 1024 and 1024. | |
1052 // See CR 6362902. | |
1053 if (FLAG_IS_DEFAULT(YoungPLABSize)) { | |
1054 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024); | |
1055 } | |
1056 if (FLAG_IS_DEFAULT(OldPLABSize)) { | |
1057 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024); | |
1058 } | |
1059 | |
1064 | 1060 // AlwaysTenure flag should make ParNew promote all at first collection. |
0 | 1061 // See CR 6362902. |
1062 if (AlwaysTenure) { | |
1063 FLAG_SET_CMDLINE(intx, MaxTenuringThreshold, 0); | |
1064 } | |
695 | 1065 // When using compressed oops, we use local overflow stacks, |
1066 // rather than using a global overflow list chained through | |
1067 // the klass word of the object's pre-image. | |
1068 if (UseCompressedOops && !ParGCUseLocalOverflow) { | |
1069 if (!FLAG_IS_DEFAULT(ParGCUseLocalOverflow)) { | |
1070 warning("Forcing +ParGCUseLocalOverflow: needed if using compressed references"); | |
1071 } | |
1072 FLAG_SET_DEFAULT(ParGCUseLocalOverflow, true); | |
1073 } | |
1074 assert(ParGCUseLocalOverflow || !UseCompressedOops, "Error"); | |
0 | 1075 } |
1076 } | |
1077 | |
1078 // Adjust some sizes to suit CMS and/or ParNew needs; these work well on | |
1079 // sparc/solaris for certain applications, but would gain from | |
1080 // further optimization and tuning efforts, and would almost | |
1081 // certainly gain from analysis of platform and environment. | |
1082 void Arguments::set_cms_and_parnew_gc_flags() { | |
1064 | 1083 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC, "Error"); |
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1084 assert(UseConcMarkSweepGC, "CMS is expected to be on here"); |
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1085 |
0 | 1086 // If we are using CMS, we prefer to UseParNewGC, |
1087 // unless explicitly forbidden. | |
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1088 if (FLAG_IS_DEFAULT(UseParNewGC)) { |
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1089 FLAG_SET_ERGO(bool, UseParNewGC, true); |
0 | 1090 } |
1091 | |
1092 // Turn off AdaptiveSizePolicy by default for cms until it is | |
10
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1093 // complete. |
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1094 if (FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) { |
0 | 1095 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); |
1096 } | |
1097 | |
1098 // In either case, adjust ParallelGCThreads and/or UseParNewGC | |
1099 // as needed. | |
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1100 if (UseParNewGC) { |
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1101 set_parnew_gc_flags(); |
0 | 1102 } |
1103 | |
1104 // Now make adjustments for CMS | |
1105 size_t young_gen_per_worker; | |
1106 intx new_ratio; | |
1107 size_t min_new_default; | |
1108 intx tenuring_default; | |
1109 if (CMSUseOldDefaults) { // old defaults: "old" as of 6.0 | |
1110 if FLAG_IS_DEFAULT(CMSYoungGenPerWorker) { | |
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1111 FLAG_SET_ERGO(intx, CMSYoungGenPerWorker, 4*M); |
0 | 1112 } |
1113 young_gen_per_worker = 4*M; | |
1114 new_ratio = (intx)15; | |
1115 min_new_default = 4*M; | |
1116 tenuring_default = (intx)0; | |
1117 } else { // new defaults: "new" as of 6.0 | |
1118 young_gen_per_worker = CMSYoungGenPerWorker; | |
1119 new_ratio = (intx)7; | |
1120 min_new_default = 16*M; | |
1121 tenuring_default = (intx)4; | |
1122 } | |
1123 | |
1124 // Preferred young gen size for "short" pauses | |
1125 const uintx parallel_gc_threads = | |
1126 (ParallelGCThreads == 0 ? 1 : ParallelGCThreads); | |
1127 const size_t preferred_max_new_size_unaligned = | |
1128 ScaleForWordSize(young_gen_per_worker * parallel_gc_threads); | |
1129 const size_t preferred_max_new_size = | |
1130 align_size_up(preferred_max_new_size_unaligned, os::vm_page_size()); | |
1131 | |
1132 // Unless explicitly requested otherwise, size young gen | |
1133 // for "short" pauses ~ 4M*ParallelGCThreads | |
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1134 |
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1135 // If either MaxNewSize or NewRatio is set on the command line, |
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1136 // assume the user is trying to set the size of the young gen. |
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1137 |
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1138 if (FLAG_IS_DEFAULT(MaxNewSize) && FLAG_IS_DEFAULT(NewRatio)) { |
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1139 |
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1140 // Set MaxNewSize to our calculated preferred_max_new_size unless |
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1141 // NewSize was set on the command line and it is larger than |
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1142 // preferred_max_new_size. |
0 | 1143 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line |
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1144 FLAG_SET_ERGO(uintx, MaxNewSize, MAX2(NewSize, preferred_max_new_size)); |
0 | 1145 } else { |
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1146 FLAG_SET_ERGO(uintx, MaxNewSize, preferred_max_new_size); |
0 | 1147 } |
1064 | 1148 if (PrintGCDetails && Verbose) { |
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1149 // Too early to use gclog_or_tty |
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1150 tty->print_cr("Ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize); |
886
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1151 } |
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1152 |
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1153 // Unless explicitly requested otherwise, prefer a large |
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1154 // Old to Young gen size so as to shift the collection load |
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1155 // to the old generation concurrent collector |
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1156 |
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1157 // If this is only guarded by FLAG_IS_DEFAULT(NewRatio) |
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1158 // then NewSize and OldSize may be calculated. That would |
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1159 // generally lead to some differences with ParNewGC for which |
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1160 // there was no obvious reason. Also limit to the case where |
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1161 // MaxNewSize has not been set. |
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1162 |
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1163 FLAG_SET_ERGO(intx, NewRatio, MAX2(NewRatio, new_ratio)); |
0 | 1164 |
886
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1165 // Code along this path potentially sets NewSize and OldSize |
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1166 |
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1167 // Calculate the desired minimum size of the young gen but if |
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1168 // NewSize has been set on the command line, use it here since |
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1169 // it should be the final value. |
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1170 size_t min_new; |
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1171 if (FLAG_IS_DEFAULT(NewSize)) { |
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1172 min_new = align_size_up(ScaleForWordSize(min_new_default), |
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1173 os::vm_page_size()); |
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1174 } else { |
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1175 min_new = NewSize; |
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1176 } |
1064 | 1177 size_t prev_initial_size = InitialHeapSize; |
1178 if (prev_initial_size != 0 && prev_initial_size < min_new + OldSize) { | |
1179 FLAG_SET_ERGO(uintx, InitialHeapSize, min_new + OldSize); | |
0 | 1180 // Currently minimum size and the initial heap sizes are the same. |
1064 | 1181 set_min_heap_size(InitialHeapSize); |
0 | 1182 if (PrintGCDetails && Verbose) { |
1183 warning("Initial heap size increased to " SIZE_FORMAT " M from " | |
1184 SIZE_FORMAT " M; use -XX:NewSize=... for finer control.", | |
1064 | 1185 InitialHeapSize/M, prev_initial_size/M); |
0 | 1186 } |
1187 } | |
886
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1188 |
0 | 1189 // MaxHeapSize is aligned down in collectorPolicy |
886
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1190 size_t max_heap = |
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1191 align_size_down(MaxHeapSize, |
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1192 CardTableRS::ct_max_alignment_constraint()); |
0 | 1193 |
1064 | 1194 if (PrintGCDetails && Verbose) { |
13
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1195 // Too early to use gclog_or_tty |
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1196 tty->print_cr("CMS set min_heap_size: " SIZE_FORMAT |
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1197 " initial_heap_size: " SIZE_FORMAT |
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1198 " max_heap: " SIZE_FORMAT, |
1064 | 1199 min_heap_size(), InitialHeapSize, max_heap); |
13
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1200 } |
0 | 1201 if (max_heap > min_new) { |
1202 // Unless explicitly requested otherwise, make young gen | |
1203 // at least min_new, and at most preferred_max_new_size. | |
1204 if (FLAG_IS_DEFAULT(NewSize)) { | |
13
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1205 FLAG_SET_ERGO(uintx, NewSize, MAX2(NewSize, min_new)); |
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1206 FLAG_SET_ERGO(uintx, NewSize, MIN2(preferred_max_new_size, NewSize)); |
1064 | 1207 if (PrintGCDetails && Verbose) { |
13
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1208 // Too early to use gclog_or_tty |
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1209 tty->print_cr("Ergo set NewSize: " SIZE_FORMAT, NewSize); |
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1210 } |
0 | 1211 } |
1212 // Unless explicitly requested otherwise, size old gen | |
1213 // so that it's at least 3X of NewSize to begin with; | |
1214 // later NewRatio will decide how it grows; see above. | |
1215 if (FLAG_IS_DEFAULT(OldSize)) { | |
1216 if (max_heap > NewSize) { | |
1064 | 1217 FLAG_SET_ERGO(uintx, OldSize, MIN2(3*NewSize, max_heap - NewSize)); |
1218 if (PrintGCDetails && Verbose) { | |
13
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1219 // Too early to use gclog_or_tty |
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1220 tty->print_cr("Ergo set OldSize: " SIZE_FORMAT, OldSize); |
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1221 } |
0 | 1222 } |
1223 } | |
1224 } | |
1225 } | |
1226 // Unless explicitly requested otherwise, definitely | |
1227 // promote all objects surviving "tenuring_default" scavenges. | |
1228 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) && | |
1229 FLAG_IS_DEFAULT(SurvivorRatio)) { | |
13
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1230 FLAG_SET_ERGO(intx, MaxTenuringThreshold, tenuring_default); |
0 | 1231 } |
1232 // If we decided above (or user explicitly requested) | |
1233 // `promote all' (via MaxTenuringThreshold := 0), | |
1234 // prefer minuscule survivor spaces so as not to waste | |
1235 // space for (non-existent) survivors | |
1236 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) { | |
13
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1237 FLAG_SET_ERGO(intx, SurvivorRatio, MAX2((intx)1024, SurvivorRatio)); |
0 | 1238 } |
1239 // If OldPLABSize is set and CMSParPromoteBlocksToClaim is not, | |
1240 // set CMSParPromoteBlocksToClaim equal to OldPLABSize. | |
1241 // This is done in order to make ParNew+CMS configuration to work | |
1242 // with YoungPLABSize and OldPLABSize options. | |
1243 // See CR 6362902. | |
1244 if (!FLAG_IS_DEFAULT(OldPLABSize)) { | |
1245 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) { | |
13
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1246 // OldPLABSize is not the default value but CMSParPromoteBlocksToClaim |
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1247 // is. In this situtation let CMSParPromoteBlocksToClaim follow |
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1248 // the value (either from the command line or ergonomics) of |
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1249 // OldPLABSize. Following OldPLABSize is an ergonomics decision. |
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1250 FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, OldPLABSize); |
1145
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1251 } else { |
0 | 1252 // OldPLABSize and CMSParPromoteBlocksToClaim are both set. |
1253 // CMSParPromoteBlocksToClaim is a collector-specific flag, so | |
1254 // we'll let it to take precedence. | |
1255 jio_fprintf(defaultStream::error_stream(), | |
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1256 "Both OldPLABSize and CMSParPromoteBlocksToClaim" |
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1257 " options are specified for the CMS collector." |
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1258 " CMSParPromoteBlocksToClaim will take precedence.\n"); |
0 | 1259 } |
1260 } | |
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1261 if (!FLAG_IS_DEFAULT(ResizeOldPLAB) && !ResizeOldPLAB) { |
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1262 // OldPLAB sizing manually turned off: Use a larger default setting, |
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1263 // unless it was manually specified. This is because a too-low value |
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1264 // will slow down scavenges. |
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1265 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) { |
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1266 FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, 50); // default value before 6631166 |
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1267 } |
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1268 } |
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1269 // Overwrite OldPLABSize which is the variable we will internally use everywhere. |
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1270 FLAG_SET_ERGO(uintx, OldPLABSize, CMSParPromoteBlocksToClaim); |
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1271 // If either of the static initialization defaults have changed, note this |
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1272 // modification. |
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1273 if (!FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim) || !FLAG_IS_DEFAULT(OldPLABWeight)) { |
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1274 CFLS_LAB::modify_initialization(OldPLABSize, OldPLABWeight); |
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1275 } |
1284 | 1276 if (PrintGCDetails && Verbose) { |
1277 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk", | |
1278 MarkStackSize / K, MarkStackSizeMax / K); | |
1279 tty->print_cr("ConcGCThreads: %u", ConcGCThreads); | |
1280 } | |
0 | 1281 } |
1145
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1282 #endif // KERNEL |
0 | 1283 |
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1284 void set_object_alignment() { |
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1285 // Object alignment. |
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1286 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2"); |
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1287 MinObjAlignmentInBytes = ObjectAlignmentInBytes; |
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1288 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small"); |
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1289 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize; |
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1290 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect"); |
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1291 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1; |
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1292 |
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1293 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes); |
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1294 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize; |
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1295 |
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1296 // Oop encoding heap max |
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1297 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes; |
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1298 |
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1299 #ifndef KERNEL |
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1300 // Set CMS global values |
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1301 CompactibleFreeListSpace::set_cms_values(); |
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1302 #endif // KERNEL |
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1303 } |
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1304 |
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1305 bool verify_object_alignment() { |
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1306 // Object alignment. |
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1307 if (!is_power_of_2(ObjectAlignmentInBytes)) { |
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1308 jio_fprintf(defaultStream::error_stream(), |
1829
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1309 "error: ObjectAlignmentInBytes=%d must be power of 2\n", |
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1310 (int)ObjectAlignmentInBytes); |
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1311 return false; |
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1312 } |
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1313 if ((int)ObjectAlignmentInBytes < BytesPerLong) { |
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1314 jio_fprintf(defaultStream::error_stream(), |
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1315 "error: ObjectAlignmentInBytes=%d must be greater or equal %d\n", |
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1316 (int)ObjectAlignmentInBytes, BytesPerLong); |
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1317 return false; |
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1318 } |
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1319 // It does not make sense to have big object alignment |
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1320 // since a space lost due to alignment will be greater |
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1321 // then a saved space from compressed oops. |
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1322 if ((int)ObjectAlignmentInBytes > 256) { |
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1323 jio_fprintf(defaultStream::error_stream(), |
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1324 "error: ObjectAlignmentInBytes=%d must not be greater then 256\n", |
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1325 (int)ObjectAlignmentInBytes); |
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1326 return false; |
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1327 } |
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1328 // In case page size is very small. |
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1329 if ((int)ObjectAlignmentInBytes >= os::vm_page_size()) { |
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1330 jio_fprintf(defaultStream::error_stream(), |
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1331 "error: ObjectAlignmentInBytes=%d must be less then page size %d\n", |
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1332 (int)ObjectAlignmentInBytes, os::vm_page_size()); |
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1333 return false; |
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1334 } |
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1335 return true; |
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1336 } |
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1337 |
135
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1338 inline uintx max_heap_for_compressed_oops() { |
1963 | 1339 // Avoid sign flip. |
1340 if (OopEncodingHeapMax < MaxPermSize + os::vm_page_size()) { | |
1341 return 0; | |
1342 } | |
1343 LP64_ONLY(return OopEncodingHeapMax - MaxPermSize - os::vm_page_size()); | |
1064 | 1344 NOT_LP64(ShouldNotReachHere(); return 0); |
135
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1345 } |
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1346 |
0 | 1347 bool Arguments::should_auto_select_low_pause_collector() { |
1348 if (UseAutoGCSelectPolicy && | |
1349 !FLAG_IS_DEFAULT(MaxGCPauseMillis) && | |
1350 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) { | |
1351 if (PrintGCDetails) { | |
1352 // Cannot use gclog_or_tty yet. | |
1353 tty->print_cr("Automatic selection of the low pause collector" | |
1354 " based on pause goal of %d (ms)", MaxGCPauseMillis); | |
1355 } | |
1356 return true; | |
1357 } | |
1358 return false; | |
1359 } | |
1360 | |
1361 void Arguments::set_ergonomics_flags() { | |
1362 // Parallel GC is not compatible with sharing. If one specifies | |
1064 | 1363 // that they want sharing explicitly, do not set ergonomics flags. |
2362
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1364 if (DumpSharedSpaces || RequireSharedSpaces) { |
0 | 1365 return; |
1366 } | |
1367 | |
1368 if (os::is_server_class_machine() && !force_client_mode ) { | |
1369 // If no other collector is requested explicitly, | |
1370 // let the VM select the collector based on | |
1371 // machine class and automatic selection policy. | |
1372 if (!UseSerialGC && | |
1373 !UseConcMarkSweepGC && | |
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1374 !UseG1GC && |
0 | 1375 !UseParNewGC && |
1376 !DumpSharedSpaces && | |
1377 FLAG_IS_DEFAULT(UseParallelGC)) { | |
1378 if (should_auto_select_low_pause_collector()) { | |
1379 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true); | |
1380 } else { | |
1381 FLAG_SET_ERGO(bool, UseParallelGC, true); | |
1382 } | |
1383 no_shared_spaces(); | |
1384 } | |
1385 } | |
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1386 |
1010 | 1387 #ifndef ZERO |
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1388 #ifdef _LP64 |
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1389 // Check that UseCompressedOops can be set with the max heap size allocated |
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1390 // by ergonomics. |
187 | 1391 if (MaxHeapSize <= max_heap_for_compressed_oops()) { |
1783 | 1392 #if !defined(COMPILER1) || defined(TIERED) |
2228 | 1393 if (FLAG_IS_DEFAULT(UseCompressedOops)) { |
932 | 1394 FLAG_SET_ERGO(bool, UseCompressedOops, true); |
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1395 } |
1060 | 1396 #endif |
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1397 #ifdef _WIN64 |
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1398 if (UseLargePages && UseCompressedOops) { |
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1399 // Cannot allocate guard pages for implicit checks in indexed addressing |
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1400 // mode, when large pages are specified on windows. |
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1401 // This flag could be switched ON if narrow oop base address is set to 0, |
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1402 // see code in Universe::initialize_heap(). |
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1403 Universe::set_narrow_oop_use_implicit_null_checks(false); |
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1404 } |
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1405 #endif // _WIN64 |
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1406 } else { |
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1407 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) { |
344 | 1408 warning("Max heap size too large for Compressed Oops"); |
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1409 FLAG_SET_DEFAULT(UseCompressedOops, false); |
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1410 } |
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1411 } |
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1412 // Also checks that certain machines are slower with compressed oops |
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1413 // in vm_version initialization code. |
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1414 #endif // _LP64 |
1010 | 1415 #endif // !ZERO |
0 | 1416 } |
1417 | |
1418 void Arguments::set_parallel_gc_flags() { | |
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1419 assert(UseParallelGC || UseParallelOldGC, "Error"); |
0 | 1420 // If parallel old was requested, automatically enable parallel scavenge. |
1421 if (UseParallelOldGC && !UseParallelGC && FLAG_IS_DEFAULT(UseParallelGC)) { | |
1422 FLAG_SET_DEFAULT(UseParallelGC, true); | |
1423 } | |
1424 | |
1425 // If no heap maximum was requested explicitly, use some reasonable fraction | |
1426 // of the physical memory, up to a maximum of 1GB. | |
1427 if (UseParallelGC) { | |
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1428 FLAG_SET_ERGO(uintx, ParallelGCThreads, |
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1429 Abstract_VM_Version::parallel_worker_threads()); |
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1430 |
0 | 1431 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the |
1432 // SurvivorRatio has been set, reset their default values to SurvivorRatio + | |
1433 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger. | |
1434 // See CR 6362902 for details. | |
1435 if (!FLAG_IS_DEFAULT(SurvivorRatio)) { | |
1436 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) { | |
1437 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2); | |
1438 } | |
1439 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) { | |
1440 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2); | |
1441 } | |
1442 } | |
1443 | |
1444 if (UseParallelOldGC) { | |
1445 // Par compact uses lower default values since they are treated as | |
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1446 // minimums. These are different defaults because of the different |
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1447 // interpretation and are not ergonomically set. |
0 | 1448 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) { |
13
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1449 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1); |
0 | 1450 } |
1451 if (FLAG_IS_DEFAULT(PermMarkSweepDeadRatio)) { | |
13
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1452 FLAG_SET_DEFAULT(PermMarkSweepDeadRatio, 5); |
0 | 1453 } |
1454 } | |
1455 } | |
1456 } | |
1457 | |
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1458 void Arguments::set_g1_gc_flags() { |
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1459 assert(UseG1GC, "Error"); |
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1460 #ifdef COMPILER1 |
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1461 FastTLABRefill = false; |
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1462 #endif |
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1463 FLAG_SET_DEFAULT(ParallelGCThreads, |
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1464 Abstract_VM_Version::parallel_worker_threads()); |
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1465 if (ParallelGCThreads == 0) { |
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1466 FLAG_SET_DEFAULT(ParallelGCThreads, |
751 | 1467 Abstract_VM_Version::parallel_worker_threads()); |
342
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1468 } |
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1469 no_shared_spaces(); |
751 | 1470 |
1284 | 1471 if (FLAG_IS_DEFAULT(MarkStackSize)) { |
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1472 FLAG_SET_DEFAULT(MarkStackSize, 128 * TASKQUEUE_SIZE); |
1284 | 1473 } |
1474 if (PrintGCDetails && Verbose) { | |
1475 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk", | |
1476 MarkStackSize / K, MarkStackSizeMax / K); | |
1477 tty->print_cr("ConcGCThreads: %u", ConcGCThreads); | |
1478 } | |
1356 | 1479 |
1480 if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) { | |
1481 // In G1, we want the default GC overhead goal to be higher than | |
1482 // say in PS. So we set it here to 10%. Otherwise the heap might | |
1483 // be expanded more aggressively than we would like it to. In | |
1484 // fact, even 10% seems to not be high enough in some cases | |
1485 // (especially small GC stress tests that the main thing they do | |
1486 // is allocation). We might consider increase it further. | |
1487 FLAG_SET_DEFAULT(GCTimeRatio, 9); | |
1488 } | |
342
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1489 } |
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1490 |
1064 | 1491 void Arguments::set_heap_size() { |
1492 if (!FLAG_IS_DEFAULT(DefaultMaxRAMFraction)) { | |
1493 // Deprecated flag | |
1494 FLAG_SET_CMDLINE(uintx, MaxRAMFraction, DefaultMaxRAMFraction); | |
1495 } | |
1496 | |
1497 const julong phys_mem = | |
1498 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM) | |
1499 : (julong)MaxRAM; | |
1500 | |
1501 // If the maximum heap size has not been set with -Xmx, | |
1502 // then set it as fraction of the size of physical memory, | |
1503 // respecting the maximum and minimum sizes of the heap. | |
342
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1504 if (FLAG_IS_DEFAULT(MaxHeapSize)) { |
1064 | 1505 julong reasonable_max = phys_mem / MaxRAMFraction; |
1506 | |
1507 if (phys_mem <= MaxHeapSize * MinRAMFraction) { | |
1508 // Small physical memory, so use a minimum fraction of it for the heap | |
1509 reasonable_max = phys_mem / MinRAMFraction; | |
1510 } else { | |
1511 // Not-small physical memory, so require a heap at least | |
1512 // as large as MaxHeapSize | |
1513 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize); | |
1514 } | |
1515 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) { | |
1516 // Limit the heap size to ErgoHeapSizeLimit | |
1517 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit); | |
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1518 } |
1064 | 1519 if (UseCompressedOops) { |
1520 // Limit the heap size to the maximum possible when using compressed oops | |
1963 | 1521 julong max_coop_heap = (julong)max_heap_for_compressed_oops(); |
1522 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) { | |
1523 // Heap should be above HeapBaseMinAddress to get zero based compressed oops | |
1524 // but it should be not less than default MaxHeapSize. | |
1525 max_coop_heap -= HeapBaseMinAddress; | |
1526 } | |
1527 reasonable_max = MIN2(reasonable_max, max_coop_heap); | |
1064 | 1528 } |
1529 reasonable_max = os::allocatable_physical_memory(reasonable_max); | |
1530 | |
1531 if (!FLAG_IS_DEFAULT(InitialHeapSize)) { | |
1532 // An initial heap size was specified on the command line, | |
1533 // so be sure that the maximum size is consistent. Done | |
1534 // after call to allocatable_physical_memory because that | |
1535 // method might reduce the allocation size. | |
1536 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize); | |
1537 } | |
1538 | |
342
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1539 if (PrintGCDetails && Verbose) { |
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1540 // Cannot use gclog_or_tty yet. |
1064 | 1541 tty->print_cr(" Maximum heap size " SIZE_FORMAT, reasonable_max); |
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1542 } |
1064 | 1543 FLAG_SET_ERGO(uintx, MaxHeapSize, (uintx)reasonable_max); |
1544 } | |
1545 | |
1546 // If the initial_heap_size has not been set with InitialHeapSize | |
1547 // or -Xms, then set it as fraction of the size of physical memory, | |
1548 // respecting the maximum and minimum sizes of the heap. | |
1549 if (FLAG_IS_DEFAULT(InitialHeapSize)) { | |
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1550 julong reasonable_minimum = (julong)(OldSize + NewSize); |
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1551 |
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1552 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize); |
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1553 |
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1554 reasonable_minimum = os::allocatable_physical_memory(reasonable_minimum); |
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1555 |
1064 | 1556 julong reasonable_initial = phys_mem / InitialRAMFraction; |
1557 | |
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1558 reasonable_initial = MAX2(reasonable_initial, reasonable_minimum); |
1064 | 1559 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize); |
1560 | |
1561 reasonable_initial = os::allocatable_physical_memory(reasonable_initial); | |
1562 | |
1563 if (PrintGCDetails && Verbose) { | |
1564 // Cannot use gclog_or_tty yet. | |
1565 tty->print_cr(" Initial heap size " SIZE_FORMAT, (uintx)reasonable_initial); | |
1074
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1566 tty->print_cr(" Minimum heap size " SIZE_FORMAT, (uintx)reasonable_minimum); |
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1567 } |
1064 | 1568 FLAG_SET_ERGO(uintx, InitialHeapSize, (uintx)reasonable_initial); |
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1569 set_min_heap_size((uintx)reasonable_minimum); |
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1570 } |
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1571 } |
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1572 |
0 | 1573 // This must be called after ergonomics because we want bytecode rewriting |
1574 // if the server compiler is used, or if UseSharedSpaces is disabled. | |
1575 void Arguments::set_bytecode_flags() { | |
1576 // Better not attempt to store into a read-only space. | |
1577 if (UseSharedSpaces) { | |
1578 FLAG_SET_DEFAULT(RewriteBytecodes, false); | |
1579 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); | |
1580 } | |
1581 | |
1582 if (!RewriteBytecodes) { | |
1583 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); | |
1584 } | |
1585 } | |
1586 | |
1587 // Aggressive optimization flags -XX:+AggressiveOpts | |
1588 void Arguments::set_aggressive_opts_flags() { | |
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1589 #ifdef COMPILER2 |
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1590 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) { |
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1591 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { |
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1592 FLAG_SET_DEFAULT(EliminateAutoBox, true); |
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1593 } |
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1594 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) { |
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1595 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000); |
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1596 } |
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1597 |
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1598 // Feed the cache size setting into the JDK |
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1599 char buffer[1024]; |
513
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1600 sprintf(buffer, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax); |
17
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1601 add_property(buffer); |
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1602 } |
65 | 1603 if (AggressiveOpts && FLAG_IS_DEFAULT(DoEscapeAnalysis)) { |
1604 FLAG_SET_DEFAULT(DoEscapeAnalysis, true); | |
1605 } | |
416
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|
1606 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) { |
b6cfd754403d
6649622: HotSpot Biased locking needs tuning on latest CPUs
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parents:
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diff
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|
1607 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500); |
b6cfd754403d
6649622: HotSpot Biased locking needs tuning on latest CPUs
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diff
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|
1608 } |
1622 | 1609 if (AggressiveOpts && FLAG_IS_DEFAULT(OptimizeStringConcat)) { |
1610 FLAG_SET_DEFAULT(OptimizeStringConcat, true); | |
1611 } | |
1763 | 1612 if (AggressiveOpts && FLAG_IS_DEFAULT(OptimizeFill)) { |
1613 FLAG_SET_DEFAULT(OptimizeFill, true); | |
1614 } | |
17
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
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parents:
0
diff
changeset
|
1615 #endif |
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6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
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parents:
0
diff
changeset
|
1616 |
0 | 1617 if (AggressiveOpts) { |
61 | 1618 // Sample flag setting code |
1619 // if (FLAG_IS_DEFAULT(EliminateZeroing)) { | |
1620 // FLAG_SET_DEFAULT(EliminateZeroing, true); | |
1621 // } | |
0 | 1622 } |
1623 } | |
1624 | |
1625 //=========================================================================================================== | |
1626 // Parsing of java.compiler property | |
1627 | |
1628 void Arguments::process_java_compiler_argument(char* arg) { | |
1629 // For backwards compatibility, Djava.compiler=NONE or "" | |
1630 // causes us to switch to -Xint mode UNLESS -Xdebug | |
1631 // is also specified. | |
1632 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) { | |
1633 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen. | |
1634 } | |
1635 } | |
1636 | |
1637 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) { | |
1638 _sun_java_launcher = strdup(launcher); | |
2302
da091bb67459
7022037: Pause when exiting if debugger is attached on windows
sla
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2243
diff
changeset
|
1639 if (strcmp("gamma", _sun_java_launcher) == 0) { |
da091bb67459
7022037: Pause when exiting if debugger is attached on windows
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parents:
2243
diff
changeset
|
1640 _created_by_gamma_launcher = true; |
da091bb67459
7022037: Pause when exiting if debugger is attached on windows
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2243
diff
changeset
|
1641 } |
0 | 1642 } |
1643 | |
1644 bool Arguments::created_by_java_launcher() { | |
1645 assert(_sun_java_launcher != NULL, "property must have value"); | |
1646 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0; | |
1647 } | |
1648 | |
2302
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7022037: Pause when exiting if debugger is attached on windows
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2243
diff
changeset
|
1649 bool Arguments::created_by_gamma_launcher() { |
da091bb67459
7022037: Pause when exiting if debugger is attached on windows
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parents:
2243
diff
changeset
|
1650 return _created_by_gamma_launcher; |
da091bb67459
7022037: Pause when exiting if debugger is attached on windows
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parents:
2243
diff
changeset
|
1651 } |
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2243
diff
changeset
|
1652 |
0 | 1653 //=========================================================================================================== |
1654 // Parsing of main arguments | |
1655 | |
1244
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1656 bool Arguments::verify_interval(uintx val, uintx min, |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
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parents:
1188
diff
changeset
|
1657 uintx max, const char* name) { |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1658 // 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
|
1659 // false, otherwise. |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1660 if (val >= min && val <= max) { |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1661 return true; |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1662 } |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1663 jio_fprintf(defaultStream::error_stream(), |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1664 "%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
|
1665 " and " UINTX_FORMAT "\n", |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1666 name, val, min, max); |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1667 return false; |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1668 } |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1669 |
1744
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1670 bool Arguments::verify_min_value(intx val, intx min, const char* name) { |
2366
1fb790245268
6820066: Check that -XX:ParGCArrayScanChunk has a value larger than zero.
jwilhelm
parents:
2362
diff
changeset
|
1671 // Returns true if given value is at least specified min threshold |
1744
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1672 // false, otherwise. |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
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1681
diff
changeset
|
1673 if (val >= min ) { |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1674 return true; |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
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1681
diff
changeset
|
1675 } |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1676 jio_fprintf(defaultStream::error_stream(), |
2366
1fb790245268
6820066: Check that -XX:ParGCArrayScanChunk has a value larger than zero.
jwilhelm
parents:
2362
diff
changeset
|
1677 "%s of " INTX_FORMAT " is invalid; must be at least " INTX_FORMAT "\n", |
1744
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1678 name, val, min); |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1679 return false; |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
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parents:
1681
diff
changeset
|
1680 } |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1681 |
0 | 1682 bool Arguments::verify_percentage(uintx value, const char* name) { |
1683 if (value <= 100) { | |
1684 return true; | |
1685 } | |
1686 jio_fprintf(defaultStream::error_stream(), | |
1687 "%s of " UINTX_FORMAT " is invalid; must be between 0 and 100\n", | |
1688 name, value); | |
1689 return false; | |
1690 } | |
1691 | |
1064 | 1692 static void force_serial_gc() { |
0 | 1693 FLAG_SET_DEFAULT(UseSerialGC, true); |
1694 FLAG_SET_DEFAULT(UseParNewGC, false); | |
1695 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
|
1696 FLAG_SET_DEFAULT(CMSIncrementalMode, false); // special CMS suboption |
0 | 1697 FLAG_SET_DEFAULT(UseParallelGC, false); |
1698 FLAG_SET_DEFAULT(UseParallelOldGC, false); | |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
135
diff
changeset
|
1699 FLAG_SET_DEFAULT(UseG1GC, false); |
0 | 1700 } |
1701 | |
1702 static bool verify_serial_gc_flags() { | |
1703 return (UseSerialGC && | |
945
68ef3fdcdb76
6872136: CMS: confusing message may be printed when a collector is switched off implicitly
ysr
parents:
932
diff
changeset
|
1704 !(UseParNewGC || (UseConcMarkSweepGC || CMSIncrementalMode) || UseG1GC || |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
135
diff
changeset
|
1705 UseParallelGC || UseParallelOldGC)); |
0 | 1706 } |
1707 | |
10
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1708 // Check consistency of GC selection |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1709 bool Arguments::check_gc_consistency() { |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1710 bool status = true; |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1711 // 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
|
1712 // 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
|
1713 // 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
|
1714 // 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
|
1715 // 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
|
1716 // 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
|
1717 // select conflicting combinations. |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1718 uint i = 0; |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1719 if (UseSerialGC) i++; |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1720 if (UseConcMarkSweepGC || UseParNewGC) i++; |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1721 if (UseParallelGC || UseParallelOldGC) i++; |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
751
diff
changeset
|
1722 if (UseG1GC) i++; |
10
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1723 if (i > 1) { |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1724 jio_fprintf(defaultStream::error_stream(), |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1725 "Conflicting collector combinations in option list; " |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1726 "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
|
1727 "allowed\n"); |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1728 status = false; |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1729 } |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1730 |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1731 return status; |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1732 } |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1733 |
1744
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1734 // Check stack pages settings |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1735 bool Arguments::check_stack_pages() |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1736 { |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1737 bool status = true; |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1738 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
|
1739 status = status && verify_min_value(StackRedPages, 1, "StackRedPages"); |
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1864
diff
changeset
|
1740 // 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
|
1741 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
|
1742 return status; |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
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parents:
1681
diff
changeset
|
1743 } |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
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1681
diff
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|
1744 |
0 | 1745 // Check the consistency of vm_init_args |
1746 bool Arguments::check_vm_args_consistency() { | |
1747 // Method for adding checks for flag consistency. | |
1748 // The intent is to warn the user of all possible conflicts, | |
1749 // before returning an error. | |
1750 // Note: Needs platform-dependent factoring. | |
1751 bool status = true; | |
1752 | |
1753 #if ( (defined(COMPILER2) && defined(SPARC))) | |
1754 // NOTE: The call to VM_Version_init depends on the fact that VM_Version_init | |
1755 // on sparc doesn't require generation of a stub as is the case on, e.g., | |
1756 // x86. Normally, VM_Version_init must be called from init_globals in | |
1757 // init.cpp, which is called by the initial java thread *after* arguments | |
1758 // have been parsed. VM_Version_init gets called twice on sparc. | |
1759 extern void VM_Version_init(); | |
1760 VM_Version_init(); | |
1761 if (!VM_Version::has_v9()) { | |
1762 jio_fprintf(defaultStream::error_stream(), | |
1763 "V8 Machine detected, Server requires V9\n"); | |
1764 status = false; | |
1765 } | |
1766 #endif /* COMPILER2 && SPARC */ | |
1767 | |
1768 // Allow both -XX:-UseStackBanging and -XX:-UseBoundThreads in non-product | |
1769 // builds so the cost of stack banging can be measured. | |
1770 #if (defined(PRODUCT) && defined(SOLARIS)) | |
1771 if (!UseBoundThreads && !UseStackBanging) { | |
1772 jio_fprintf(defaultStream::error_stream(), | |
1773 "-UseStackBanging conflicts with -UseBoundThreads\n"); | |
1774 | |
1775 status = false; | |
1776 } | |
1777 #endif | |
1778 | |
1779 if (TLABRefillWasteFraction == 0) { | |
1780 jio_fprintf(defaultStream::error_stream(), | |
1781 "TLABRefillWasteFraction should be a denominator, " | |
1782 "not " SIZE_FORMAT "\n", | |
1783 TLABRefillWasteFraction); | |
1784 status = false; | |
1785 } | |
1786 | |
10
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
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|
1787 status = status && verify_percentage(AdaptiveSizePolicyWeight, |
0 | 1788 "AdaptiveSizePolicyWeight"); |
10
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1789 status = status && verify_percentage(AdaptivePermSizeWeight, "AdaptivePermSizeWeight"); |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1790 status = status && verify_percentage(ThresholdTolerance, "ThresholdTolerance"); |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1791 status = status && verify_percentage(MinHeapFreeRatio, "MinHeapFreeRatio"); |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1792 status = status && verify_percentage(MaxHeapFreeRatio, "MaxHeapFreeRatio"); |
0 | 1793 |
1794 if (MinHeapFreeRatio > MaxHeapFreeRatio) { | |
1795 jio_fprintf(defaultStream::error_stream(), | |
1796 "MinHeapFreeRatio (" UINTX_FORMAT ") must be less than or " | |
1797 "equal to MaxHeapFreeRatio (" UINTX_FORMAT ")\n", | |
1798 MinHeapFreeRatio, MaxHeapFreeRatio); | |
1799 status = false; | |
1800 } | |
1801 // Keeping the heap 100% free is hard ;-) so limit it to 99%. | |
1802 MinHeapFreeRatio = MIN2(MinHeapFreeRatio, (uintx) 99); | |
1803 | |
1804 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) { | |
1805 MarkSweepAlwaysCompactCount = 1; // Move objects every gc. | |
1806 } | |
1807 | |
483
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
449
diff
changeset
|
1808 if (UseParallelOldGC && ParallelOldGCSplitALot) { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
449
diff
changeset
|
1809 // Settings to encourage splitting. |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
449
diff
changeset
|
1810 if (!FLAG_IS_CMDLINE(NewRatio)) { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
449
diff
changeset
|
1811 FLAG_SET_CMDLINE(intx, NewRatio, 2); |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
449
diff
changeset
|
1812 } |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
449
diff
changeset
|
1813 if (!FLAG_IS_CMDLINE(ScavengeBeforeFullGC)) { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
449
diff
changeset
|
1814 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); |
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1815 } |
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1816 } |
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1817 |
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1818 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); |
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1819 status = status && verify_percentage(GCTimeLimit, "GCTimeLimit"); |
0 | 1820 if (GCTimeLimit == 100) { |
1821 // Turn off gc-overhead-limit-exceeded checks | |
1822 FLAG_SET_DEFAULT(UseGCOverheadLimit, false); | |
1823 } | |
1824 | |
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1825 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); |
0 | 1826 |
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1827 status = status && check_gc_consistency(); |
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1828 status = status && check_stack_pages(); |
0 | 1829 |
1830 if (_has_alloc_profile) { | |
1831 if (UseParallelGC || UseParallelOldGC) { | |
1832 jio_fprintf(defaultStream::error_stream(), | |
1833 "error: invalid argument combination.\n" | |
1834 "Allocation profiling (-Xaprof) cannot be used together with " | |
1835 "Parallel GC (-XX:+UseParallelGC or -XX:+UseParallelOldGC).\n"); | |
1836 status = false; | |
1837 } | |
1838 if (UseConcMarkSweepGC) { | |
1839 jio_fprintf(defaultStream::error_stream(), | |
1840 "error: invalid argument combination.\n" | |
1841 "Allocation profiling (-Xaprof) cannot be used together with " | |
1842 "the CMS collector (-XX:+UseConcMarkSweepGC).\n"); | |
1843 status = false; | |
1844 } | |
1845 } | |
1846 | |
1847 if (CMSIncrementalMode) { | |
1848 if (!UseConcMarkSweepGC) { | |
1849 jio_fprintf(defaultStream::error_stream(), | |
1850 "error: invalid argument combination.\n" | |
1851 "The CMS collector (-XX:+UseConcMarkSweepGC) must be " | |
1852 "selected in order\nto use CMSIncrementalMode.\n"); | |
1853 status = false; | |
1854 } else { | |
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1855 status = status && verify_percentage(CMSIncrementalDutyCycle, |
0 | 1856 "CMSIncrementalDutyCycle"); |
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1857 status = status && verify_percentage(CMSIncrementalDutyCycleMin, |
0 | 1858 "CMSIncrementalDutyCycleMin"); |
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1859 status = status && verify_percentage(CMSIncrementalSafetyFactor, |
0 | 1860 "CMSIncrementalSafetyFactor"); |
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1861 status = status && verify_percentage(CMSIncrementalOffset, |
0 | 1862 "CMSIncrementalOffset"); |
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1863 status = status && verify_percentage(CMSExpAvgFactor, |
0 | 1864 "CMSExpAvgFactor"); |
1865 // If it was not set on the command line, set | |
1866 // CMSInitiatingOccupancyFraction to 1 so icms can initiate cycles early. | |
1867 if (CMSInitiatingOccupancyFraction < 0) { | |
1868 FLAG_SET_DEFAULT(CMSInitiatingOccupancyFraction, 1); | |
1869 } | |
1870 } | |
1871 } | |
1872 | |
1873 // CMS space iteration, which FLSVerifyAllHeapreferences entails, | |
1874 // insists that we hold the requisite locks so that the iteration is | |
1875 // MT-safe. For the verification at start-up and shut-down, we don't | |
1876 // yet have a good way of acquiring and releasing these locks, | |
1877 // which are not visible at the CollectedHeap level. We want to | |
1878 // be able to acquire these locks and then do the iteration rather | |
1879 // than just disable the lock verification. This will be fixed under | |
1880 // bug 4788986. | |
1881 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) { | |
1882 if (VerifyGCStartAt == 0) { | |
1883 warning("Heap verification at start-up disabled " | |
1884 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); | |
1885 VerifyGCStartAt = 1; // Disable verification at start-up | |
1886 } | |
1887 if (VerifyBeforeExit) { | |
1888 warning("Heap verification at shutdown disabled " | |
1889 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); | |
1890 VerifyBeforeExit = false; // Disable verification at shutdown | |
1891 } | |
1892 } | |
1893 | |
1894 // Note: only executed in non-PRODUCT mode | |
1895 if (!UseAsyncConcMarkSweepGC && | |
1896 (ExplicitGCInvokesConcurrent || | |
1897 ExplicitGCInvokesConcurrentAndUnloadsClasses)) { | |
1898 jio_fprintf(defaultStream::error_stream(), | |
1899 "error: +ExplictGCInvokesConcurrent[AndUnloadsClasses] conflicts" | |
1900 " with -UseAsyncConcMarkSweepGC"); | |
1901 status = false; | |
1902 } | |
1903 | |
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1904 status = status && verify_min_value(ParGCArrayScanChunk, 1, "ParGCArrayScanChunk"); |
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1905 |
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1906 #ifndef SERIALGC |
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1907 if (UseG1GC) { |
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1908 status = status && verify_percentage(InitiatingHeapOccupancyPercent, |
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1909 "InitiatingHeapOccupancyPercent"); |
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1910 status = status && verify_min_value(G1RefProcDrainInterval, 1, |
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1911 "G1RefProcDrainInterval"); |
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1912 status = status && verify_min_value((intx)G1ConcMarkStepDurationMillis, 1, |
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1913 "G1ConcMarkStepDurationMillis"); |
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1914 } |
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1915 #endif |
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1916 |
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1917 status = status && verify_interval(RefDiscoveryPolicy, |
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1918 ReferenceProcessor::DiscoveryPolicyMin, |
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1919 ReferenceProcessor::DiscoveryPolicyMax, |
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1920 "RefDiscoveryPolicy"); |
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1921 |
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1922 // Limit the lower bound of this flag to 1 as it is used in a division |
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1923 // expression. |
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1924 status = status && verify_interval(TLABWasteTargetPercent, |
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1925 1, 100, "TLABWasteTargetPercent"); |
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1926 |
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1927 status = status && verify_object_alignment(); |
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1928 |
0 | 1929 return status; |
1930 } | |
1931 | |
1932 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore, | |
1933 const char* option_type) { | |
1934 if (ignore) return false; | |
1935 | |
1936 const char* spacer = " "; | |
1937 if (option_type == NULL) { | |
1938 option_type = ++spacer; // Set both to the empty string. | |
1939 } | |
1940 | |
1941 if (os::obsolete_option(option)) { | |
1942 jio_fprintf(defaultStream::error_stream(), | |
1943 "Obsolete %s%soption: %s\n", option_type, spacer, | |
1944 option->optionString); | |
1945 return false; | |
1946 } else { | |
1947 jio_fprintf(defaultStream::error_stream(), | |
1948 "Unrecognized %s%soption: %s\n", option_type, spacer, | |
1949 option->optionString); | |
1950 return true; | |
1951 } | |
1952 } | |
1953 | |
1954 static const char* user_assertion_options[] = { | |
1955 "-da", "-ea", "-disableassertions", "-enableassertions", 0 | |
1956 }; | |
1957 | |
1958 static const char* system_assertion_options[] = { | |
1959 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0 | |
1960 }; | |
1961 | |
1962 // Return true if any of the strings in null-terminated array 'names' matches. | |
1963 // If tail_allowed is true, then the tail must begin with a colon; otherwise, | |
1964 // the option must match exactly. | |
1965 static bool match_option(const JavaVMOption* option, const char** names, const char** tail, | |
1966 bool tail_allowed) { | |
1967 for (/* empty */; *names != NULL; ++names) { | |
1968 if (match_option(option, *names, tail)) { | |
1969 if (**tail == '\0' || tail_allowed && **tail == ':') { | |
1970 return true; | |
1971 } | |
1972 } | |
1973 } | |
1974 return false; | |
1975 } | |
1976 | |
1284 | 1977 bool Arguments::parse_uintx(const char* value, |
1978 uintx* uintx_arg, | |
1979 uintx min_size) { | |
1980 | |
1981 // Check the sign first since atomull() parses only unsigned values. | |
1982 bool value_is_positive = !(*value == '-'); | |
1983 | |
1984 if (value_is_positive) { | |
1985 julong n; | |
1986 bool good_return = atomull(value, &n); | |
1987 if (good_return) { | |
1988 bool above_minimum = n >= min_size; | |
1989 bool value_is_too_large = n > max_uintx; | |
1990 | |
1991 if (above_minimum && !value_is_too_large) { | |
1992 *uintx_arg = n; | |
1993 return true; | |
1994 } | |
1995 } | |
1996 } | |
1997 return false; | |
1998 } | |
1999 | |
0 | 2000 Arguments::ArgsRange Arguments::parse_memory_size(const char* s, |
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2001 julong* long_arg, |
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|
2002 julong min_size) { |
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2003 if (!atomull(s, long_arg)) return arg_unreadable; |
0 | 2004 return check_memory_size(*long_arg, min_size); |
2005 } | |
2006 | |
2007 // Parse JavaVMInitArgs structure | |
2008 | |
2009 jint Arguments::parse_vm_init_args(const JavaVMInitArgs* args) { | |
2010 // For components of the system classpath. | |
2011 SysClassPath scp(Arguments::get_sysclasspath()); | |
2012 bool scp_assembly_required = false; | |
2013 | |
2014 // Save default settings for some mode flags | |
2015 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; | |
2016 Arguments::_UseOnStackReplacement = UseOnStackReplacement; | |
2017 Arguments::_ClipInlining = ClipInlining; | |
2018 Arguments::_BackgroundCompilation = BackgroundCompilation; | |
2019 | |
2020 // Parse JAVA_TOOL_OPTIONS environment variable (if present) | |
2021 jint result = parse_java_tool_options_environment_variable(&scp, &scp_assembly_required); | |
2022 if (result != JNI_OK) { | |
2023 return result; | |
2024 } | |
2025 | |
2026 // Parse JavaVMInitArgs structure passed in | |
2027 result = parse_each_vm_init_arg(args, &scp, &scp_assembly_required, COMMAND_LINE); | |
2028 if (result != JNI_OK) { | |
2029 return result; | |
2030 } | |
2031 | |
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2032 if (AggressiveOpts) { |
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2033 // Insert alt-rt.jar between user-specified bootclasspath |
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2034 // prefix and the default bootclasspath. os::set_boot_path() |
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2035 // uses meta_index_dir as the default bootclasspath directory. |
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2036 const char* altclasses_jar = "alt-rt.jar"; |
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2037 size_t altclasses_path_len = strlen(get_meta_index_dir()) + 1 + |
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2038 strlen(altclasses_jar); |
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2039 char* altclasses_path = NEW_C_HEAP_ARRAY(char, altclasses_path_len); |
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2040 strcpy(altclasses_path, get_meta_index_dir()); |
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2041 strcat(altclasses_path, altclasses_jar); |
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2042 scp.add_suffix_to_prefix(altclasses_path); |
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2043 scp_assembly_required = true; |
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|
2044 FREE_C_HEAP_ARRAY(char, altclasses_path); |
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2045 } |
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2046 |
0 | 2047 // Parse _JAVA_OPTIONS environment variable (if present) (mimics classic VM) |
2048 result = parse_java_options_environment_variable(&scp, &scp_assembly_required); | |
2049 if (result != JNI_OK) { | |
2050 return result; | |
2051 } | |
2052 | |
2053 // Do final processing now that all arguments have been parsed | |
2054 result = finalize_vm_init_args(&scp, scp_assembly_required); | |
2055 if (result != JNI_OK) { | |
2056 return result; | |
2057 } | |
2058 | |
2059 return JNI_OK; | |
2060 } | |
2061 | |
2062 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, | |
2063 SysClassPath* scp_p, | |
2064 bool* scp_assembly_required_p, | |
2065 FlagValueOrigin origin) { | |
2066 // Remaining part of option string | |
2067 const char* tail; | |
2068 | |
2069 // iterate over arguments | |
2070 for (int index = 0; index < args->nOptions; index++) { | |
2071 bool is_absolute_path = false; // for -agentpath vs -agentlib | |
2072 | |
2073 const JavaVMOption* option = args->options + index; | |
2074 | |
2075 if (!match_option(option, "-Djava.class.path", &tail) && | |
2076 !match_option(option, "-Dsun.java.command", &tail) && | |
2077 !match_option(option, "-Dsun.java.launcher", &tail)) { | |
2078 | |
2079 // add all jvm options to the jvm_args string. This string | |
2080 // is used later to set the java.vm.args PerfData string constant. | |
2081 // the -Djava.class.path and the -Dsun.java.command options are | |
2082 // omitted from jvm_args string as each have their own PerfData | |
2083 // string constant object. | |
2084 build_jvm_args(option->optionString); | |
2085 } | |
2086 | |
2087 // -verbose:[class/gc/jni] | |
2088 if (match_option(option, "-verbose", &tail)) { | |
2089 if (!strcmp(tail, ":class") || !strcmp(tail, "")) { | |
2090 FLAG_SET_CMDLINE(bool, TraceClassLoading, true); | |
2091 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); | |
2092 } else if (!strcmp(tail, ":gc")) { | |
2093 FLAG_SET_CMDLINE(bool, PrintGC, true); | |
2094 } else if (!strcmp(tail, ":jni")) { | |
2095 FLAG_SET_CMDLINE(bool, PrintJNIResolving, true); | |
2096 } | |
2097 // -da / -ea / -disableassertions / -enableassertions | |
2098 // These accept an optional class/package name separated by a colon, e.g., | |
2099 // -da:java.lang.Thread. | |
2100 } else if (match_option(option, user_assertion_options, &tail, true)) { | |
2101 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' | |
2102 if (*tail == '\0') { | |
2103 JavaAssertions::setUserClassDefault(enable); | |
2104 } else { | |
2105 assert(*tail == ':', "bogus match by match_option()"); | |
2106 JavaAssertions::addOption(tail + 1, enable); | |
2107 } | |
2108 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions | |
2109 } else if (match_option(option, system_assertion_options, &tail, false)) { | |
2110 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' | |
2111 JavaAssertions::setSystemClassDefault(enable); | |
2112 // -bootclasspath: | |
2113 } else if (match_option(option, "-Xbootclasspath:", &tail)) { | |
2114 scp_p->reset_path(tail); | |
2115 *scp_assembly_required_p = true; | |
2116 // -bootclasspath/a: | |
2117 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) { | |
2118 scp_p->add_suffix(tail); | |
2119 *scp_assembly_required_p = true; | |
2120 // -bootclasspath/p: | |
2121 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) { | |
2122 scp_p->add_prefix(tail); | |
2123 *scp_assembly_required_p = true; | |
2124 // -Xrun | |
2125 } else if (match_option(option, "-Xrun", &tail)) { | |
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2126 if (tail != NULL) { |
0 | 2127 const char* pos = strchr(tail, ':'); |
2128 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; | |
2129 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); | |
2130 name[len] = '\0'; | |
2131 | |
2132 char *options = NULL; | |
2133 if(pos != NULL) { | |
2134 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied. | |
2135 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2), pos+1, len2); | |
2136 } | |
2137 #ifdef JVMTI_KERNEL | |
2138 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { | |
2139 warning("profiling and debugging agents are not supported with Kernel VM"); | |
2140 } else | |
2141 #endif // JVMTI_KERNEL | |
2142 add_init_library(name, options); | |
2143 } | |
2144 // -agentlib and -agentpath | |
2145 } else if (match_option(option, "-agentlib:", &tail) || | |
2146 (is_absolute_path = match_option(option, "-agentpath:", &tail))) { | |
2147 if(tail != NULL) { | |
2148 const char* pos = strchr(tail, '='); | |
2149 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; | |
2150 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); | |
2151 name[len] = '\0'; | |
2152 | |
2153 char *options = NULL; | |
2154 if(pos != NULL) { | |
2155 options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(pos + 1) + 1), pos + 1); | |
2156 } | |
2157 #ifdef JVMTI_KERNEL | |
2158 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { | |
2159 warning("profiling and debugging agents are not supported with Kernel VM"); | |
2160 } else | |
2161 #endif // JVMTI_KERNEL | |
2162 add_init_agent(name, options, is_absolute_path); | |
2163 | |
2164 } | |
2165 // -javaagent | |
2166 } else if (match_option(option, "-javaagent:", &tail)) { | |
2167 if(tail != NULL) { | |
2168 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1), tail); | |
2169 add_init_agent("instrument", options, false); | |
2170 } | |
2171 // -Xnoclassgc | |
2172 } else if (match_option(option, "-Xnoclassgc", &tail)) { | |
2173 FLAG_SET_CMDLINE(bool, ClassUnloading, false); | |
2174 // -Xincgc: i-CMS | |
2175 } else if (match_option(option, "-Xincgc", &tail)) { | |
2176 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); | |
2177 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, true); | |
2178 // -Xnoincgc: no i-CMS | |
2179 } else if (match_option(option, "-Xnoincgc", &tail)) { | |
2180 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); | |
2181 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, false); | |
2182 // -Xconcgc | |
2183 } else if (match_option(option, "-Xconcgc", &tail)) { | |
2184 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); | |
2185 // -Xnoconcgc | |
2186 } else if (match_option(option, "-Xnoconcgc", &tail)) { | |
2187 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); | |
2188 // -Xbatch | |
2189 } else if (match_option(option, "-Xbatch", &tail)) { | |
2190 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); | |
2191 // -Xmn for compatibility with other JVM vendors | |
2192 } else if (match_option(option, "-Xmn", &tail)) { | |
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2193 julong long_initial_eden_size = 0; |
0 | 2194 ArgsRange errcode = parse_memory_size(tail, &long_initial_eden_size, 1); |
2195 if (errcode != arg_in_range) { | |
2196 jio_fprintf(defaultStream::error_stream(), | |
2197 "Invalid initial eden size: %s\n", option->optionString); | |
2198 describe_range_error(errcode); | |
2199 return JNI_EINVAL; | |
2200 } | |
1064 | 2201 FLAG_SET_CMDLINE(uintx, MaxNewSize, (uintx)long_initial_eden_size); |
2202 FLAG_SET_CMDLINE(uintx, NewSize, (uintx)long_initial_eden_size); | |
0 | 2203 // -Xms |
2204 } else if (match_option(option, "-Xms", &tail)) { | |
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2205 julong long_initial_heap_size = 0; |
0 | 2206 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 1); |
2207 if (errcode != arg_in_range) { | |
2208 jio_fprintf(defaultStream::error_stream(), | |
2209 "Invalid initial heap size: %s\n", option->optionString); | |
2210 describe_range_error(errcode); | |
2211 return JNI_EINVAL; | |
2212 } | |
1064 | 2213 FLAG_SET_CMDLINE(uintx, InitialHeapSize, (uintx)long_initial_heap_size); |
0 | 2214 // Currently the minimum size and the initial heap sizes are the same. |
1064 | 2215 set_min_heap_size(InitialHeapSize); |
0 | 2216 // -Xmx |
2217 } else if (match_option(option, "-Xmx", &tail)) { | |
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2218 julong long_max_heap_size = 0; |
0 | 2219 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1); |
2220 if (errcode != arg_in_range) { | |
2221 jio_fprintf(defaultStream::error_stream(), | |
2222 "Invalid maximum heap size: %s\n", option->optionString); | |
2223 describe_range_error(errcode); | |
2224 return JNI_EINVAL; | |
2225 } | |
1064 | 2226 FLAG_SET_CMDLINE(uintx, MaxHeapSize, (uintx)long_max_heap_size); |
0 | 2227 // Xmaxf |
2228 } else if (match_option(option, "-Xmaxf", &tail)) { | |
2229 int maxf = (int)(atof(tail) * 100); | |
2230 if (maxf < 0 || maxf > 100) { | |
2231 jio_fprintf(defaultStream::error_stream(), | |
2232 "Bad max heap free percentage size: %s\n", | |
2233 option->optionString); | |
2234 return JNI_EINVAL; | |
2235 } else { | |
2236 FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf); | |
2237 } | |
2238 // Xminf | |
2239 } else if (match_option(option, "-Xminf", &tail)) { | |
2240 int minf = (int)(atof(tail) * 100); | |
2241 if (minf < 0 || minf > 100) { | |
2242 jio_fprintf(defaultStream::error_stream(), | |
2243 "Bad min heap free percentage size: %s\n", | |
2244 option->optionString); | |
2245 return JNI_EINVAL; | |
2246 } else { | |
2247 FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf); | |
2248 } | |
2249 // -Xss | |
2250 } else if (match_option(option, "-Xss", &tail)) { | |
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2251 julong long_ThreadStackSize = 0; |
0 | 2252 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000); |
2253 if (errcode != arg_in_range) { | |
2254 jio_fprintf(defaultStream::error_stream(), | |
2255 "Invalid thread stack size: %s\n", option->optionString); | |
2256 describe_range_error(errcode); | |
2257 return JNI_EINVAL; | |
2258 } | |
2259 // Internally track ThreadStackSize in units of 1024 bytes. | |
2260 FLAG_SET_CMDLINE(intx, ThreadStackSize, | |
2261 round_to((int)long_ThreadStackSize, K) / K); | |
2262 // -Xoss | |
2263 } else if (match_option(option, "-Xoss", &tail)) { | |
2264 // HotSpot does not have separate native and Java stacks, ignore silently for compatibility | |
2265 // -Xmaxjitcodesize | |
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2266 } else if (match_option(option, "-Xmaxjitcodesize", &tail) || |
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2267 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) { |
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2268 julong long_ReservedCodeCacheSize = 0; |
0 | 2269 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, |
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2270 (size_t)InitialCodeCacheSize); |
0 | 2271 if (errcode != arg_in_range) { |
2272 jio_fprintf(defaultStream::error_stream(), | |
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2273 "Invalid maximum code cache size: %s. Should be greater than InitialCodeCacheSize=%dK\n", |
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2274 option->optionString, InitialCodeCacheSize/K); |
0 | 2275 describe_range_error(errcode); |
2276 return JNI_EINVAL; | |
2277 } | |
2278 FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize); | |
2279 // -green | |
2280 } else if (match_option(option, "-green", &tail)) { | |
2281 jio_fprintf(defaultStream::error_stream(), | |
2282 "Green threads support not available\n"); | |
2283 return JNI_EINVAL; | |
2284 // -native | |
2285 } else if (match_option(option, "-native", &tail)) { | |
2286 // HotSpot always uses native threads, ignore silently for compatibility | |
2287 // -Xsqnopause | |
2288 } else if (match_option(option, "-Xsqnopause", &tail)) { | |
2289 // EVM option, ignore silently for compatibility | |
2290 // -Xrs | |
2291 } else if (match_option(option, "-Xrs", &tail)) { | |
2292 // Classic/EVM option, new functionality | |
2293 FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true); | |
2294 } else if (match_option(option, "-Xusealtsigs", &tail)) { | |
2295 // change default internal VM signals used - lower case for back compat | |
2296 FLAG_SET_CMDLINE(bool, UseAltSigs, true); | |
2297 // -Xoptimize | |
2298 } else if (match_option(option, "-Xoptimize", &tail)) { | |
2299 // EVM option, ignore silently for compatibility | |
2300 // -Xprof | |
2301 } else if (match_option(option, "-Xprof", &tail)) { | |
2302 #ifndef FPROF_KERNEL | |
2303 _has_profile = true; | |
2304 #else // FPROF_KERNEL | |
2305 // do we have to exit? | |
2306 warning("Kernel VM does not support flat profiling."); | |
2307 #endif // FPROF_KERNEL | |
2308 // -Xaprof | |
2309 } else if (match_option(option, "-Xaprof", &tail)) { | |
2310 _has_alloc_profile = true; | |
2311 // -Xconcurrentio | |
2312 } else if (match_option(option, "-Xconcurrentio", &tail)) { | |
2313 FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true); | |
2314 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); | |
2315 FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1); | |
2316 FLAG_SET_CMDLINE(bool, UseTLAB, false); | |
2317 FLAG_SET_CMDLINE(uintx, NewSizeThreadIncrease, 16 * K); // 20Kb per thread added to new generation | |
2318 | |
2319 // -Xinternalversion | |
2320 } else if (match_option(option, "-Xinternalversion", &tail)) { | |
2321 jio_fprintf(defaultStream::output_stream(), "%s\n", | |
2322 VM_Version::internal_vm_info_string()); | |
2323 vm_exit(0); | |
2324 #ifndef PRODUCT | |
2325 // -Xprintflags | |
2326 } else if (match_option(option, "-Xprintflags", &tail)) { | |
2327 CommandLineFlags::printFlags(); | |
2328 vm_exit(0); | |
2329 #endif | |
2330 // -D | |
2331 } else if (match_option(option, "-D", &tail)) { | |
2332 if (!add_property(tail)) { | |
2333 return JNI_ENOMEM; | |
2334 } | |
2335 // Out of the box management support | |
2336 if (match_option(option, "-Dcom.sun.management", &tail)) { | |
2337 FLAG_SET_CMDLINE(bool, ManagementServer, true); | |
2338 } | |
2339 // -Xint | |
2340 } else if (match_option(option, "-Xint", &tail)) { | |
2341 set_mode_flags(_int); | |
2342 // -Xmixed | |
2343 } else if (match_option(option, "-Xmixed", &tail)) { | |
2344 set_mode_flags(_mixed); | |
2345 // -Xcomp | |
2346 } else if (match_option(option, "-Xcomp", &tail)) { | |
2347 // for testing the compiler; turn off all flags that inhibit compilation | |
2348 set_mode_flags(_comp); | |
2349 | |
2350 // -Xshare:dump | |
2351 } else if (match_option(option, "-Xshare:dump", &tail)) { | |
2352 #ifdef TIERED | |
2353 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); | |
2354 set_mode_flags(_int); // Prevent compilation, which creates objects | |
2355 #elif defined(COMPILER2) | |
2356 vm_exit_during_initialization( | |
2357 "Dumping a shared archive is not supported on the Server JVM.", NULL); | |
2358 #elif defined(KERNEL) | |
2359 vm_exit_during_initialization( | |
2360 "Dumping a shared archive is not supported on the Kernel JVM.", NULL); | |
2361 #else | |
2362 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); | |
2363 set_mode_flags(_int); // Prevent compilation, which creates objects | |
2364 #endif | |
2365 // -Xshare:on | |
2366 } else if (match_option(option, "-Xshare:on", &tail)) { | |
2367 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); | |
2368 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true); | |
2369 // -Xshare:auto | |
2370 } else if (match_option(option, "-Xshare:auto", &tail)) { | |
2371 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); | |
2372 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); | |
2373 // -Xshare:off | |
2374 } else if (match_option(option, "-Xshare:off", &tail)) { | |
2375 FLAG_SET_CMDLINE(bool, UseSharedSpaces, false); | |
2376 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); | |
2377 | |
2378 // -Xverify | |
2379 } else if (match_option(option, "-Xverify", &tail)) { | |
2380 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) { | |
2381 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true); | |
2382 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); | |
2383 } else if (strcmp(tail, ":remote") == 0) { | |
2384 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); | |
2385 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); | |
2386 } else if (strcmp(tail, ":none") == 0) { | |
2387 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); | |
2388 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false); | |
2389 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) { | |
2390 return JNI_EINVAL; | |
2391 } | |
2392 // -Xdebug | |
2393 } else if (match_option(option, "-Xdebug", &tail)) { | |
2394 // note this flag has been used, then ignore | |
2395 set_xdebug_mode(true); | |
2396 // -Xnoagent | |
2397 } else if (match_option(option, "-Xnoagent", &tail)) { | |
2398 // For compatibility with classic. HotSpot refuses to load the old style agent.dll. | |
2399 } else if (match_option(option, "-Xboundthreads", &tail)) { | |
2400 // Bind user level threads to kernel threads (Solaris only) | |
2401 FLAG_SET_CMDLINE(bool, UseBoundThreads, true); | |
2402 } else if (match_option(option, "-Xloggc:", &tail)) { | |
2403 // Redirect GC output to the file. -Xloggc:<filename> | |
2404 // ostream_init_log(), when called will use this filename | |
2405 // to initialize a fileStream. | |
2406 _gc_log_filename = strdup(tail); | |
2407 FLAG_SET_CMDLINE(bool, PrintGC, true); | |
2408 FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true); | |
2409 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); | |
2410 | |
2411 // JNI hooks | |
2412 } else if (match_option(option, "-Xcheck", &tail)) { | |
2413 if (!strcmp(tail, ":jni")) { | |
2414 CheckJNICalls = true; | |
2415 } else if (is_bad_option(option, args->ignoreUnrecognized, | |
2416 "check")) { | |
2417 return JNI_EINVAL; | |
2418 } | |
2419 } else if (match_option(option, "vfprintf", &tail)) { | |
2420 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo); | |
2421 } else if (match_option(option, "exit", &tail)) { | |
2422 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo); | |
2423 } else if (match_option(option, "abort", &tail)) { | |
2424 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo); | |
2425 // -XX:+AggressiveHeap | |
2426 } else if (match_option(option, "-XX:+AggressiveHeap", &tail)) { | |
2427 | |
2428 // This option inspects the machine and attempts to set various | |
2429 // parameters to be optimal for long-running, memory allocation | |
2430 // intensive jobs. It is intended for machines with large | |
2431 // amounts of cpu and memory. | |
2432 | |
2433 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit | |
2434 // VM, but we may not be able to represent the total physical memory | |
2435 // available (like having 8gb of memory on a box but using a 32bit VM). | |
2436 // Thus, we need to make sure we're using a julong for intermediate | |
2437 // calculations. | |
2438 julong initHeapSize; | |
2439 julong total_memory = os::physical_memory(); | |
2440 | |
2441 if (total_memory < (julong)256*M) { | |
2442 jio_fprintf(defaultStream::error_stream(), | |
2443 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n"); | |
2444 vm_exit(1); | |
2445 } | |
2446 | |
2447 // The heap size is half of available memory, or (at most) | |
2448 // all of possible memory less 160mb (leaving room for the OS | |
2449 // when using ISM). This is the maximum; because adaptive sizing | |
2450 // is turned on below, the actual space used may be smaller. | |
2451 | |
2452 initHeapSize = MIN2(total_memory / (julong)2, | |
2453 total_memory - (julong)160*M); | |
2454 | |
2455 // Make sure that if we have a lot of memory we cap the 32 bit | |
2456 // process space. The 64bit VM version of this function is a nop. | |
2457 initHeapSize = os::allocatable_physical_memory(initHeapSize); | |
2458 | |
2459 // The perm gen is separate but contiguous with the | |
2460 // object heap (and is reserved with it) so subtract it | |
2461 // from the heap size. | |
2462 if (initHeapSize > MaxPermSize) { | |
2463 initHeapSize = initHeapSize - MaxPermSize; | |
2464 } else { | |
2465 warning("AggressiveHeap and MaxPermSize values may conflict"); | |
2466 } | |
2467 | |
2468 if (FLAG_IS_DEFAULT(MaxHeapSize)) { | |
2469 FLAG_SET_CMDLINE(uintx, MaxHeapSize, initHeapSize); | |
1064 | 2470 FLAG_SET_CMDLINE(uintx, InitialHeapSize, initHeapSize); |
0 | 2471 // Currently the minimum size and the initial heap sizes are the same. |
1064 | 2472 set_min_heap_size(initHeapSize); |
0 | 2473 } |
2474 if (FLAG_IS_DEFAULT(NewSize)) { | |
2475 // Make the young generation 3/8ths of the total heap. | |
2476 FLAG_SET_CMDLINE(uintx, NewSize, | |
2477 ((julong)MaxHeapSize / (julong)8) * (julong)3); | |
2478 FLAG_SET_CMDLINE(uintx, MaxNewSize, NewSize); | |
2479 } | |
2480 | |
2481 FLAG_SET_DEFAULT(UseLargePages, true); | |
2482 | |
2483 // Increase some data structure sizes for efficiency | |
2484 FLAG_SET_CMDLINE(uintx, BaseFootPrintEstimate, MaxHeapSize); | |
2485 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); | |
2486 FLAG_SET_CMDLINE(uintx, TLABSize, 256*K); | |
2487 | |
2488 // See the OldPLABSize comment below, but replace 'after promotion' | |
2489 // with 'after copying'. YoungPLABSize is the size of the survivor | |
2490 // space per-gc-thread buffers. The default is 4kw. | |
2491 FLAG_SET_CMDLINE(uintx, YoungPLABSize, 256*K); // Note: this is in words | |
2492 | |
2493 // OldPLABSize is the size of the buffers in the old gen that | |
2494 // UseParallelGC uses to promote live data that doesn't fit in the | |
2495 // survivor spaces. At any given time, there's one for each gc thread. | |
2496 // The default size is 1kw. These buffers are rarely used, since the | |
2497 // survivor spaces are usually big enough. For specjbb, however, there | |
2498 // are occasions when there's lots of live data in the young gen | |
2499 // and we end up promoting some of it. We don't have a definite | |
2500 // explanation for why bumping OldPLABSize helps, but the theory | |
2501 // is that a bigger PLAB results in retaining something like the | |
2502 // original allocation order after promotion, which improves mutator | |
2503 // locality. A minor effect may be that larger PLABs reduce the | |
2504 // number of PLAB allocation events during gc. The value of 8kw | |
2505 // was arrived at by experimenting with specjbb. | |
2506 FLAG_SET_CMDLINE(uintx, OldPLABSize, 8*K); // Note: this is in words | |
2507 | |
2508 // CompilationPolicyChoice=0 causes the server compiler to adopt | |
2509 // a more conservative which-method-do-I-compile policy when one | |
2510 // of the counters maintained by the interpreter trips. The | |
2511 // result is reduced startup time and improved specjbb and | |
2512 // alacrity performance. Zero is the default, but we set it | |
2513 // explicitly here in case the default changes. | |
2514 // See runtime/compilationPolicy.*. | |
2515 FLAG_SET_CMDLINE(intx, CompilationPolicyChoice, 0); | |
2516 | |
2517 // Enable parallel GC and adaptive generation sizing | |
2518 FLAG_SET_CMDLINE(bool, UseParallelGC, true); | |
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2519 FLAG_SET_DEFAULT(ParallelGCThreads, |
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2520 Abstract_VM_Version::parallel_worker_threads()); |
0 | 2521 |
2522 // Encourage steady state memory management | |
2523 FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100); | |
2524 | |
2525 // This appears to improve mutator locality | |
2526 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); | |
2527 | |
2528 // Get around early Solaris scheduling bug | |
2529 // (affinity vs other jobs on system) | |
2530 // but disallow DR and offlining (5008695). | |
2531 FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true); | |
2532 | |
2533 } else if (match_option(option, "-XX:+NeverTenure", &tail)) { | |
2534 // The last option must always win. | |
2535 FLAG_SET_CMDLINE(bool, AlwaysTenure, false); | |
2536 FLAG_SET_CMDLINE(bool, NeverTenure, true); | |
2537 } else if (match_option(option, "-XX:+AlwaysTenure", &tail)) { | |
2538 // The last option must always win. | |
2539 FLAG_SET_CMDLINE(bool, NeverTenure, false); | |
2540 FLAG_SET_CMDLINE(bool, AlwaysTenure, true); | |
2541 } else if (match_option(option, "-XX:+CMSPermGenSweepingEnabled", &tail) || | |
2542 match_option(option, "-XX:-CMSPermGenSweepingEnabled", &tail)) { | |
2543 jio_fprintf(defaultStream::error_stream(), | |
2544 "Please use CMSClassUnloadingEnabled in place of " | |
2545 "CMSPermGenSweepingEnabled in the future\n"); | |
2546 } else if (match_option(option, "-XX:+UseGCTimeLimit", &tail)) { | |
2547 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, true); | |
2548 jio_fprintf(defaultStream::error_stream(), | |
2549 "Please use -XX:+UseGCOverheadLimit in place of " | |
2550 "-XX:+UseGCTimeLimit in the future\n"); | |
2551 } else if (match_option(option, "-XX:-UseGCTimeLimit", &tail)) { | |
2552 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, false); | |
2553 jio_fprintf(defaultStream::error_stream(), | |
2554 "Please use -XX:-UseGCOverheadLimit in place of " | |
2555 "-XX:-UseGCTimeLimit in the future\n"); | |
2556 // The TLE options are for compatibility with 1.3 and will be | |
2557 // removed without notice in a future release. These options | |
2558 // are not to be documented. | |
2559 } else if (match_option(option, "-XX:MaxTLERatio=", &tail)) { | |
2560 // No longer used. | |
2561 } else if (match_option(option, "-XX:+ResizeTLE", &tail)) { | |
2562 FLAG_SET_CMDLINE(bool, ResizeTLAB, true); | |
2563 } else if (match_option(option, "-XX:-ResizeTLE", &tail)) { | |
2564 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); | |
2565 } else if (match_option(option, "-XX:+PrintTLE", &tail)) { | |
2566 FLAG_SET_CMDLINE(bool, PrintTLAB, true); | |
2567 } else if (match_option(option, "-XX:-PrintTLE", &tail)) { | |
2568 FLAG_SET_CMDLINE(bool, PrintTLAB, false); | |
2569 } else if (match_option(option, "-XX:TLEFragmentationRatio=", &tail)) { | |
2570 // No longer used. | |
2571 } else if (match_option(option, "-XX:TLESize=", &tail)) { | |
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2572 julong long_tlab_size = 0; |
0 | 2573 ArgsRange errcode = parse_memory_size(tail, &long_tlab_size, 1); |
2574 if (errcode != arg_in_range) { | |
2575 jio_fprintf(defaultStream::error_stream(), | |
2576 "Invalid TLAB size: %s\n", option->optionString); | |
2577 describe_range_error(errcode); | |
2578 return JNI_EINVAL; | |
2579 } | |
2580 FLAG_SET_CMDLINE(uintx, TLABSize, long_tlab_size); | |
2581 } else if (match_option(option, "-XX:TLEThreadRatio=", &tail)) { | |
2582 // No longer used. | |
2583 } else if (match_option(option, "-XX:+UseTLE", &tail)) { | |
2584 FLAG_SET_CMDLINE(bool, UseTLAB, true); | |
2585 } else if (match_option(option, "-XX:-UseTLE", &tail)) { | |
2586 FLAG_SET_CMDLINE(bool, UseTLAB, false); | |
2587 SOLARIS_ONLY( | |
2588 } else if (match_option(option, "-XX:+UsePermISM", &tail)) { | |
2589 warning("-XX:+UsePermISM is obsolete."); | |
2590 FLAG_SET_CMDLINE(bool, UseISM, true); | |
2591 } else if (match_option(option, "-XX:-UsePermISM", &tail)) { | |
2592 FLAG_SET_CMDLINE(bool, UseISM, false); | |
2593 ) | |
2594 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr", &tail)) { | |
2595 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false); | |
2596 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true); | |
2597 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout", &tail)) { | |
2598 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false); | |
2599 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true); | |
2600 } else if (match_option(option, "-XX:+ExtendedDTraceProbes", &tail)) { | |
2601 #ifdef SOLARIS | |
2602 FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true); | |
2603 FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true); | |
2604 FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true); | |
2605 FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true); | |
2606 #else // ndef SOLARIS | |
2607 jio_fprintf(defaultStream::error_stream(), | |
2608 "ExtendedDTraceProbes flag is only applicable on Solaris\n"); | |
2609 return JNI_EINVAL; | |
2610 #endif // ndef SOLARIS | |
2611 #ifdef ASSERT | |
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2612 } else if (match_option(option, "-XX:+FullGCALot", &tail)) { |
0 | 2613 FLAG_SET_CMDLINE(bool, FullGCALot, true); |
2614 // disable scavenge before parallel mark-compact | |
2615 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); | |
2616 #endif | |
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2617 } else if (match_option(option, "-XX:CMSParPromoteBlocksToClaim=", &tail)) { |
0 | 2618 julong cms_blocks_to_claim = (julong)atol(tail); |
2619 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); | |
2620 jio_fprintf(defaultStream::error_stream(), | |
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2621 "Please use -XX:OldPLABSize in place of " |
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2622 "-XX:CMSParPromoteBlocksToClaim in the future\n"); |
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6631166: CMS: better heuristics when combatting fragmentation
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2623 } else if (match_option(option, "-XX:ParCMSPromoteBlocksToClaim=", &tail)) { |
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6631166: CMS: better heuristics when combatting fragmentation
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|
2624 julong cms_blocks_to_claim = (julong)atol(tail); |
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|
2625 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); |
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|
2626 jio_fprintf(defaultStream::error_stream(), |
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|
2627 "Please use -XX:OldPLABSize in place of " |
0 | 2628 "-XX:ParCMSPromoteBlocksToClaim in the future\n"); |
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|
2629 } else if (match_option(option, "-XX:ParallelGCOldGenAllocBufferSize=", &tail)) { |
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2630 julong old_plab_size = 0; |
0 | 2631 ArgsRange errcode = parse_memory_size(tail, &old_plab_size, 1); |
2632 if (errcode != arg_in_range) { | |
2633 jio_fprintf(defaultStream::error_stream(), | |
2634 "Invalid old PLAB size: %s\n", option->optionString); | |
2635 describe_range_error(errcode); | |
2636 return JNI_EINVAL; | |
2637 } | |
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|
2638 FLAG_SET_CMDLINE(uintx, OldPLABSize, old_plab_size); |
0 | 2639 jio_fprintf(defaultStream::error_stream(), |
2640 "Please use -XX:OldPLABSize in place of " | |
2641 "-XX:ParallelGCOldGenAllocBufferSize in the future\n"); | |
1145
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|
2642 } else if (match_option(option, "-XX:ParallelGCToSpaceAllocBufferSize=", &tail)) { |
489
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2643 julong young_plab_size = 0; |
0 | 2644 ArgsRange errcode = parse_memory_size(tail, &young_plab_size, 1); |
2645 if (errcode != arg_in_range) { | |
2646 jio_fprintf(defaultStream::error_stream(), | |
2647 "Invalid young PLAB size: %s\n", option->optionString); | |
2648 describe_range_error(errcode); | |
2649 return JNI_EINVAL; | |
2650 } | |
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diff
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|
2651 FLAG_SET_CMDLINE(uintx, YoungPLABSize, young_plab_size); |
0 | 2652 jio_fprintf(defaultStream::error_stream(), |
2653 "Please use -XX:YoungPLABSize in place of " | |
2654 "-XX:ParallelGCToSpaceAllocBufferSize in the future\n"); | |
1284 | 2655 } else if (match_option(option, "-XX:CMSMarkStackSize=", &tail) || |
2656 match_option(option, "-XX:G1MarkStackSize=", &tail)) { | |
2657 julong stack_size = 0; | |
2658 ArgsRange errcode = parse_memory_size(tail, &stack_size, 1); | |
2659 if (errcode != arg_in_range) { | |
2660 jio_fprintf(defaultStream::error_stream(), | |
2661 "Invalid mark stack size: %s\n", option->optionString); | |
2662 describe_range_error(errcode); | |
2663 return JNI_EINVAL; | |
2664 } | |
2665 FLAG_SET_CMDLINE(uintx, MarkStackSize, stack_size); | |
2666 } else if (match_option(option, "-XX:CMSMarkStackSizeMax=", &tail)) { | |
2667 julong max_stack_size = 0; | |
2668 ArgsRange errcode = parse_memory_size(tail, &max_stack_size, 1); | |
2669 if (errcode != arg_in_range) { | |
2670 jio_fprintf(defaultStream::error_stream(), | |
2671 "Invalid maximum mark stack size: %s\n", | |
2672 option->optionString); | |
2673 describe_range_error(errcode); | |
2674 return JNI_EINVAL; | |
2675 } | |
2676 FLAG_SET_CMDLINE(uintx, MarkStackSizeMax, max_stack_size); | |
2677 } else if (match_option(option, "-XX:ParallelMarkingThreads=", &tail) || | |
2678 match_option(option, "-XX:ParallelCMSThreads=", &tail)) { | |
2679 uintx conc_threads = 0; | |
2680 if (!parse_uintx(tail, &conc_threads, 1)) { | |
2681 jio_fprintf(defaultStream::error_stream(), | |
2682 "Invalid concurrent threads: %s\n", option->optionString); | |
2683 return JNI_EINVAL; | |
2684 } | |
2685 FLAG_SET_CMDLINE(uintx, ConcGCThreads, conc_threads); | |
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|
2686 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx |
0 | 2687 // Skip -XX:Flags= since that case has already been handled |
2688 if (strncmp(tail, "Flags=", strlen("Flags=")) != 0) { | |
2689 if (!process_argument(tail, args->ignoreUnrecognized, origin)) { | |
2690 return JNI_EINVAL; | |
2691 } | |
2692 } | |
2693 // Unknown option | |
2694 } else if (is_bad_option(option, args->ignoreUnrecognized)) { | |
2695 return JNI_ERR; | |
2696 } | |
2697 } | |
449
171e581e8161
6554406: Change switch UseVMInterruptibleIO default to false (sol)
xlu
parents:
420
diff
changeset
|
2698 // Change the default value for flags which have different default values |
171e581e8161
6554406: Change switch UseVMInterruptibleIO default to false (sol)
xlu
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420
diff
changeset
|
2699 // when working with older JDKs. |
171e581e8161
6554406: Change switch UseVMInterruptibleIO default to false (sol)
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diff
changeset
|
2700 if (JDK_Version::current().compare_major(6) <= 0 && |
171e581e8161
6554406: Change switch UseVMInterruptibleIO default to false (sol)
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420
diff
changeset
|
2701 FLAG_IS_DEFAULT(UseVMInterruptibleIO)) { |
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6554406: Change switch UseVMInterruptibleIO default to false (sol)
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420
diff
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|
2702 FLAG_SET_DEFAULT(UseVMInterruptibleIO, true); |
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6554406: Change switch UseVMInterruptibleIO default to false (sol)
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diff
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|
2703 } |
1679
3d90023429ec
6888526: Linux getCurrentThreadCpuTime is drastically slower than Windows
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1628
diff
changeset
|
2704 #ifdef LINUX |
3d90023429ec
6888526: Linux getCurrentThreadCpuTime is drastically slower than Windows
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diff
changeset
|
2705 if (JDK_Version::current().compare_major(6) <= 0 && |
3d90023429ec
6888526: Linux getCurrentThreadCpuTime is drastically slower than Windows
aph
parents:
1628
diff
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|
2706 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) { |
3d90023429ec
6888526: Linux getCurrentThreadCpuTime is drastically slower than Windows
aph
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1628
diff
changeset
|
2707 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false); |
3d90023429ec
6888526: Linux getCurrentThreadCpuTime is drastically slower than Windows
aph
parents:
1628
diff
changeset
|
2708 } |
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6888526: Linux getCurrentThreadCpuTime is drastically slower than Windows
aph
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1628
diff
changeset
|
2709 #endif // LINUX |
0 | 2710 return JNI_OK; |
2711 } | |
2712 | |
2713 jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) { | |
2714 // This must be done after all -D arguments have been processed. | |
2715 scp_p->expand_endorsed(); | |
2716 | |
2717 if (scp_assembly_required || scp_p->get_endorsed() != NULL) { | |
2718 // Assemble the bootclasspath elements into the final path. | |
2719 Arguments::set_sysclasspath(scp_p->combined_path()); | |
2720 } | |
2721 | |
2722 // This must be done after all arguments have been processed. | |
2723 // java_compiler() true means set to "NONE" or empty. | |
2724 if (java_compiler() && !xdebug_mode()) { | |
2725 // For backwards compatibility, we switch to interpreted mode if | |
2726 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was | |
2727 // not specified. | |
2728 set_mode_flags(_int); | |
2729 } | |
2730 if (CompileThreshold == 0) { | |
2731 set_mode_flags(_int); | |
2732 } | |
2733 | |
2734 #ifndef COMPILER2 | |
2735 // Don't degrade server performance for footprint | |
2736 if (FLAG_IS_DEFAULT(UseLargePages) && | |
2737 MaxHeapSize < LargePageHeapSizeThreshold) { | |
2738 // No need for large granularity pages w/small heaps. | |
2739 // Note that large pages are enabled/disabled for both the | |
2740 // Java heap and the code cache. | |
2741 FLAG_SET_DEFAULT(UseLargePages, false); | |
2742 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseMPSS, false)); | |
2743 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseISM, false)); | |
2744 } | |
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6711316: Open source the Garbage-First garbage collector
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diff
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|
2745 |
1251
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1188
diff
changeset
|
2746 // Tiered compilation is undefined with C1. |
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1188
diff
changeset
|
2747 TieredCompilation = false; |
0 | 2748 #else |
2749 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) { | |
2750 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1); | |
2751 } | |
342
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|
2752 // Temporary disable bulk zeroing reduction with G1. See CR 6627983. |
37f87013dfd8
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diff
changeset
|
2753 if (UseG1GC) { |
37f87013dfd8
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diff
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|
2754 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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|
2755 } |
0 | 2756 #endif |
2757 | |
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126ea7725993
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1679
diff
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|
2758 // If we are running in a headless jre, force java.awt.headless property |
126ea7725993
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diff
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|
2759 // to be true unless the property has already been set. |
126ea7725993
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1679
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|
2760 // 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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|
2761 if (os::is_headless_jre()) { |
126ea7725993
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1679
diff
changeset
|
2762 const char* headless = Arguments::get_property("java.awt.headless"); |
126ea7725993
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1679
diff
changeset
|
2763 if (headless == NULL) { |
126ea7725993
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bobv
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1679
diff
changeset
|
2764 char envbuffer[128]; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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1679
diff
changeset
|
2765 if (!os::getenv("JAVA_AWT_HEADLESS", envbuffer, sizeof(envbuffer))) { |
126ea7725993
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diff
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|
2766 if (!add_property("java.awt.headless=true")) { |
126ea7725993
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bobv
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1679
diff
changeset
|
2767 return JNI_ENOMEM; |
126ea7725993
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diff
changeset
|
2768 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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1679
diff
changeset
|
2769 } else { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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1679
diff
changeset
|
2770 char buffer[256]; |
126ea7725993
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bobv
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1679
diff
changeset
|
2771 strcpy(buffer, "java.awt.headless="); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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1679
diff
changeset
|
2772 strcat(buffer, envbuffer); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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diff
changeset
|
2773 if (!add_property(buffer)) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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1679
diff
changeset
|
2774 return JNI_ENOMEM; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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diff
changeset
|
2775 } |
126ea7725993
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1679
diff
changeset
|
2776 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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1679
diff
changeset
|
2777 } |
126ea7725993
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|
2778 } |
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|
2779 |
0 | 2780 if (!check_vm_args_consistency()) { |
2781 return JNI_ERR; | |
2782 } | |
2783 | |
2784 return JNI_OK; | |
2785 } | |
2786 | |
2787 jint Arguments::parse_java_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { | |
2788 return parse_options_environment_variable("_JAVA_OPTIONS", scp_p, | |
2789 scp_assembly_required_p); | |
2790 } | |
2791 | |
2792 jint Arguments::parse_java_tool_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { | |
2793 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", scp_p, | |
2794 scp_assembly_required_p); | |
2795 } | |
2796 | |
2797 jint Arguments::parse_options_environment_variable(const char* name, SysClassPath* scp_p, bool* scp_assembly_required_p) { | |
2798 const int N_MAX_OPTIONS = 64; | |
2799 const int OPTION_BUFFER_SIZE = 1024; | |
2800 char buffer[OPTION_BUFFER_SIZE]; | |
2801 | |
2802 // The variable will be ignored if it exceeds the length of the buffer. | |
2803 // Don't check this variable if user has special privileges | |
2804 // (e.g. unix su command). | |
2805 if (os::getenv(name, buffer, sizeof(buffer)) && | |
2806 !os::have_special_privileges()) { | |
2807 JavaVMOption options[N_MAX_OPTIONS]; // Construct option array | |
2808 jio_fprintf(defaultStream::error_stream(), | |
2809 "Picked up %s: %s\n", name, buffer); | |
2810 char* rd = buffer; // pointer to the input string (rd) | |
2811 int i; | |
2812 for (i = 0; i < N_MAX_OPTIONS;) { // repeat for all options in the input string | |
2813 while (isspace(*rd)) rd++; // skip whitespace | |
2814 if (*rd == 0) break; // we re done when the input string is read completely | |
2815 | |
2816 // The output, option string, overwrites the input string. | |
2817 // Because of quoting, the pointer to the option string (wrt) may lag the pointer to | |
2818 // input string (rd). | |
2819 char* wrt = rd; | |
2820 | |
2821 options[i++].optionString = wrt; // Fill in option | |
2822 while (*rd != 0 && !isspace(*rd)) { // unquoted strings terminate with a space or NULL | |
2823 if (*rd == '\'' || *rd == '"') { // handle a quoted string | |
2824 int quote = *rd; // matching quote to look for | |
2825 rd++; // don't copy open quote | |
2826 while (*rd != quote) { // include everything (even spaces) up until quote | |
2827 if (*rd == 0) { // string termination means unmatched string | |
2828 jio_fprintf(defaultStream::error_stream(), | |
2829 "Unmatched quote in %s\n", name); | |
2830 return JNI_ERR; | |
2831 } | |
2832 *wrt++ = *rd++; // copy to option string | |
2833 } | |
2834 rd++; // don't copy close quote | |
2835 } else { | |
2836 *wrt++ = *rd++; // copy to option string | |
2837 } | |
2838 } | |
2839 // Need to check if we're done before writing a NULL, | |
2840 // because the write could be to the byte that rd is pointing to. | |
2841 if (*rd++ == 0) { | |
2842 *wrt = 0; | |
2843 break; | |
2844 } | |
2845 *wrt = 0; // Zero terminate option | |
2846 } | |
2847 // Construct JavaVMInitArgs structure and parse as if it was part of the command line | |
2848 JavaVMInitArgs vm_args; | |
2849 vm_args.version = JNI_VERSION_1_2; | |
2850 vm_args.options = options; | |
2851 vm_args.nOptions = i; | |
564 | 2852 vm_args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions; |
0 | 2853 |
2854 if (PrintVMOptions) { | |
2855 const char* tail; | |
2856 for (int i = 0; i < vm_args.nOptions; i++) { | |
2857 const JavaVMOption *option = vm_args.options + i; | |
2858 if (match_option(option, "-XX:", &tail)) { | |
2859 logOption(tail); | |
2860 } | |
2861 } | |
2862 } | |
2863 | |
2864 return(parse_each_vm_init_arg(&vm_args, scp_p, scp_assembly_required_p, ENVIRON_VAR)); | |
2865 } | |
2866 return JNI_OK; | |
2867 } | |
2868 | |
2362
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2302
diff
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|
2869 void Arguments::set_shared_spaces_flags() { |
a2c2eac1ca62
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diff
changeset
|
2870 // Check whether class data sharing settings conflict with GC, compressed oops |
a2c2eac1ca62
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jcoomes
parents:
2302
diff
changeset
|
2871 // or page size, and fix them up. Explicit sharing options override other |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2872 // settings. |
a2c2eac1ca62
7018056: large pages not always enabled by default
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2302
diff
changeset
|
2873 const bool cannot_share = UseConcMarkSweepGC || CMSIncrementalMode || |
a2c2eac1ca62
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diff
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|
2874 UseG1GC || UseParNewGC || UseParallelGC || UseParallelOldGC || |
a2c2eac1ca62
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diff
changeset
|
2875 UseCompressedOops || UseLargePages && FLAG_IS_CMDLINE(UseLargePages); |
a2c2eac1ca62
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diff
changeset
|
2876 const bool must_share = DumpSharedSpaces || RequireSharedSpaces; |
a2c2eac1ca62
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diff
changeset
|
2877 const bool might_share = must_share || UseSharedSpaces; |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2878 if (cannot_share) { |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2879 if (must_share) { |
a2c2eac1ca62
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jcoomes
parents:
2302
diff
changeset
|
2880 warning("selecting serial gc and disabling large pages %s" |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2881 "because of %s", "" LP64_ONLY("and compressed oops "), |
a2c2eac1ca62
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parents:
2302
diff
changeset
|
2882 DumpSharedSpaces ? "-Xshare:dump" : "-Xshare:on"); |
a2c2eac1ca62
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jcoomes
parents:
2302
diff
changeset
|
2883 force_serial_gc(); |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
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diff
changeset
|
2884 FLAG_SET_CMDLINE(bool, UseLargePages, false); |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2885 LP64_ONLY(FLAG_SET_CMDLINE(bool, UseCompressedOops, false)); |
a2c2eac1ca62
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jcoomes
parents:
2302
diff
changeset
|
2886 } else { |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2887 if (UseSharedSpaces && Verbose) { |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2888 warning("turning off use of shared archive because of " |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2889 "choice of garbage collector or large pages"); |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2890 } |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2891 no_shared_spaces(); |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2892 } |
a2c2eac1ca62
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2302
diff
changeset
|
2893 } else if (UseLargePages && might_share) { |
a2c2eac1ca62
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parents:
2302
diff
changeset
|
2894 // Disable large pages to allow shared spaces. This is sub-optimal, since |
a2c2eac1ca62
7018056: large pages not always enabled by default
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parents:
2302
diff
changeset
|
2895 // there may not even be a shared archive to use. |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
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diff
changeset
|
2896 FLAG_SET_DEFAULT(UseLargePages, false); |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2897 } |
a2c2eac1ca62
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jcoomes
parents:
2302
diff
changeset
|
2898 } |
1891
9de67bf4244d
6996136: VM crash in src/share/vm/runtime/virtualspace.cpp:424
iveresov
parents:
1890
diff
changeset
|
2899 |
0 | 2900 // Parse entry point called from JNI_CreateJavaVM |
2901 | |
2902 jint Arguments::parse(const JavaVMInitArgs* args) { | |
2903 | |
2904 // Sharing support | |
2905 // Construct the path to the archive | |
2906 char jvm_path[JVM_MAXPATHLEN]; | |
2907 os::jvm_path(jvm_path, sizeof(jvm_path)); | |
2908 #ifdef TIERED | |
2909 if (strstr(jvm_path, "client") != NULL) { | |
2910 force_client_mode = true; | |
2911 } | |
2912 #endif // TIERED | |
2913 char *end = strrchr(jvm_path, *os::file_separator()); | |
2914 if (end != NULL) *end = '\0'; | |
2915 char *shared_archive_path = NEW_C_HEAP_ARRAY(char, strlen(jvm_path) + | |
2916 strlen(os::file_separator()) + 20); | |
2917 if (shared_archive_path == NULL) return JNI_ENOMEM; | |
2918 strcpy(shared_archive_path, jvm_path); | |
2919 strcat(shared_archive_path, os::file_separator()); | |
2920 strcat(shared_archive_path, "classes"); | |
2921 DEBUG_ONLY(strcat(shared_archive_path, "_g");) | |
2922 strcat(shared_archive_path, ".jsa"); | |
2923 SharedArchivePath = shared_archive_path; | |
2924 | |
2925 // Remaining part of option string | |
2926 const char* tail; | |
2927 | |
2928 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed. | |
2929 bool settings_file_specified = false; | |
564 | 2930 const char* flags_file; |
0 | 2931 int index; |
2932 for (index = 0; index < args->nOptions; index++) { | |
2933 const JavaVMOption *option = args->options + index; | |
2934 if (match_option(option, "-XX:Flags=", &tail)) { | |
564 | 2935 flags_file = tail; |
0 | 2936 settings_file_specified = true; |
2937 } | |
2938 if (match_option(option, "-XX:+PrintVMOptions", &tail)) { | |
2939 PrintVMOptions = true; | |
2940 } | |
253
b0fe4deeb9fb
6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents:
196
diff
changeset
|
2941 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
|
2942 PrintVMOptions = false; |
b0fe4deeb9fb
6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents:
196
diff
changeset
|
2943 } |
564 | 2944 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions", &tail)) { |
2945 IgnoreUnrecognizedVMOptions = true; | |
2946 } | |
2947 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions", &tail)) { | |
2948 IgnoreUnrecognizedVMOptions = false; | |
2949 } | |
1150 | 2950 if (match_option(option, "-XX:+PrintFlagsInitial", &tail)) { |
2951 CommandLineFlags::printFlags(); | |
2952 vm_exit(0); | |
2953 } | |
1768
6ee479178066
6979444: add command line option to print command line flags descriptions
ikrylov
parents:
1745
diff
changeset
|
2954 |
6ee479178066
6979444: add command line option to print command line flags descriptions
ikrylov
parents:
1745
diff
changeset
|
2955 #ifndef PRODUCT |
6ee479178066
6979444: add command line option to print command line flags descriptions
ikrylov
parents:
1745
diff
changeset
|
2956 if (match_option(option, "-XX:+PrintFlagsWithComments", &tail)) { |
6ee479178066
6979444: add command line option to print command line flags descriptions
ikrylov
parents:
1745
diff
changeset
|
2957 CommandLineFlags::printFlags(true); |
6ee479178066
6979444: add command line option to print command line flags descriptions
ikrylov
parents:
1745
diff
changeset
|
2958 vm_exit(0); |
6ee479178066
6979444: add command line option to print command line flags descriptions
ikrylov
parents:
1745
diff
changeset
|
2959 } |
6ee479178066
6979444: add command line option to print command line flags descriptions
ikrylov
parents:
1745
diff
changeset
|
2960 #endif |
564 | 2961 } |
2962 | |
2963 if (IgnoreUnrecognizedVMOptions) { | |
2964 // uncast const to modify the flag args->ignoreUnrecognized | |
2965 *(jboolean*)(&args->ignoreUnrecognized) = true; | |
2966 } | |
2967 | |
2968 // Parse specified settings file | |
2969 if (settings_file_specified) { | |
2970 if (!process_settings_file(flags_file, true, args->ignoreUnrecognized)) { | |
2971 return JNI_EINVAL; | |
2972 } | |
0 | 2973 } |
2974 | |
2975 // Parse default .hotspotrc settings file | |
2976 if (!settings_file_specified) { | |
2977 if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) { | |
2978 return JNI_EINVAL; | |
2979 } | |
2980 } | |
2981 | |
2982 if (PrintVMOptions) { | |
2983 for (index = 0; index < args->nOptions; index++) { | |
2984 const JavaVMOption *option = args->options + index; | |
2985 if (match_option(option, "-XX:", &tail)) { | |
2986 logOption(tail); | |
2987 } | |
2988 } | |
2989 } | |
2990 | |
2991 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS | |
2992 jint result = parse_vm_init_args(args); | |
2993 if (result != JNI_OK) { | |
2994 return result; | |
2995 } | |
2996 | |
2997 #ifndef PRODUCT | |
2998 if (TraceBytecodesAt != 0) { | |
2999 TraceBytecodes = true; | |
3000 } | |
3001 if (CountCompiledCalls) { | |
3002 if (UseCounterDecay) { | |
3003 warning("UseCounterDecay disabled because CountCalls is set"); | |
3004 UseCounterDecay = false; | |
3005 } | |
3006 } | |
3007 #endif // PRODUCT | |
3008 | |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
712
diff
changeset
|
3009 if (EnableInvokeDynamic && !EnableMethodHandles) { |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
712
diff
changeset
|
3010 if (!FLAG_IS_DEFAULT(EnableMethodHandles)) { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
3011 warning("forcing EnableMethodHandles true because EnableInvokeDynamic is true"); |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
712
diff
changeset
|
3012 } |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
712
diff
changeset
|
3013 EnableMethodHandles = true; |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
712
diff
changeset
|
3014 } |
710 | 3015 if (EnableMethodHandles && !AnonymousClasses) { |
3016 if (!FLAG_IS_DEFAULT(AnonymousClasses)) { | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
3017 warning("forcing AnonymousClasses true because EnableMethodHandles is true"); |
710 | 3018 } |
3019 AnonymousClasses = true; | |
3020 } | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
3021 if ((EnableMethodHandles || AnonymousClasses) && ScavengeRootsInCode == 0) { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
3022 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
3023 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
|
3024 } |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
3025 ScavengeRootsInCode = 1; |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
3026 } |
710 | 3027 |
0 | 3028 if (PrintGCDetails) { |
3029 // Turn on -verbose:gc options as well | |
3030 PrintGC = true; | |
3031 } | |
3032 | |
1571
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
1506
diff
changeset
|
3033 // 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
|
3034 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
|
3035 |
0 | 3036 #ifdef SERIALGC |
1064 | 3037 force_serial_gc(); |
0 | 3038 #endif // SERIALGC |
3039 #ifdef KERNEL | |
3040 no_shared_spaces(); | |
3041 #endif // KERNEL | |
3042 | |
3043 // Set flags based on ergonomics. | |
3044 set_ergonomics_flags(); | |
3045 | |
2362
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
3046 set_shared_spaces_flags(); |
1135
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
3047 |
10
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
3048 // Check the GC selections again. |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
3049 if (!check_gc_consistency()) { |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
3050 return JNI_EINVAL; |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
3051 } |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
3052 |
1783 | 3053 if (TieredCompilation) { |
3054 set_tiered_flags(); | |
3055 } else { | |
3056 // Check if the policy is valid. Policies 0 and 1 are valid for non-tiered setup. | |
3057 if (CompilationPolicyChoice >= 2) { | |
3058 vm_exit_during_initialization( | |
3059 "Incompatible compilation policy selected", NULL); | |
3060 } | |
3061 } | |
3062 | |
1145
e018e6884bd8
6631166: CMS: better heuristics when combatting fragmentation
ysr
parents:
1074
diff
changeset
|
3063 #ifndef KERNEL |
1064 | 3064 if (UseConcMarkSweepGC) { |
3065 // Set flags for CMS and ParNew. Check UseConcMarkSweep first | |
3066 // to ensure that when both UseConcMarkSweepGC and UseParNewGC | |
3067 // 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
|
3068 set_cms_and_parnew_gc_flags(); |
1064 | 3069 } else { |
3070 // Set heap size based on available physical memory | |
3071 set_heap_size(); | |
3072 // Set per-collector flags | |
3073 if (UseParallelGC || UseParallelOldGC) { | |
3074 set_parallel_gc_flags(); | |
3075 } else if (UseParNewGC) { | |
3076 set_parnew_gc_flags(); | |
3077 } else if (UseG1GC) { | |
3078 set_g1_gc_flags(); | |
3079 } | |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
135
diff
changeset
|
3080 } |
1145
e018e6884bd8
6631166: CMS: better heuristics when combatting fragmentation
ysr
parents:
1074
diff
changeset
|
3081 #endif // KERNEL |
10
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
3082 |
0 | 3083 #ifdef SERIALGC |
3084 assert(verify_serial_gc_flags(), "SerialGC unset"); | |
3085 #endif // SERIALGC | |
3086 | |
3087 // Set bytecode rewriting flags | |
3088 set_bytecode_flags(); | |
3089 | |
3090 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled. | |
3091 set_aggressive_opts_flags(); | |
3092 | |
2239
c08677f98289
6840152: JVM crashes when heavyweight monitors are used
coleenp
parents:
2176
diff
changeset
|
3093 // Turn off biased locking for locking debug mode flags, |
c08677f98289
6840152: JVM crashes when heavyweight monitors are used
coleenp
parents:
2176
diff
changeset
|
3094 // which are subtlely different from each other but neither works with |
c08677f98289
6840152: JVM crashes when heavyweight monitors are used
coleenp
parents:
2176
diff
changeset
|
3095 // biased locking. |
c08677f98289
6840152: JVM crashes when heavyweight monitors are used
coleenp
parents:
2176
diff
changeset
|
3096 if (!UseFastLocking || UseHeavyMonitors) { |
c08677f98289
6840152: JVM crashes when heavyweight monitors are used
coleenp
parents:
2176
diff
changeset
|
3097 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) { |
c08677f98289
6840152: JVM crashes when heavyweight monitors are used
coleenp
parents:
2176
diff
changeset
|
3098 // flag set to true on command line; warn the user that they |
c08677f98289
6840152: JVM crashes when heavyweight monitors are used
coleenp
parents:
2176
diff
changeset
|
3099 // can't enable biased locking here |
c08677f98289
6840152: JVM crashes when heavyweight monitors are used
coleenp
parents:
2176
diff
changeset
|
3100 warning("Biased Locking is not supported with locking debug flags" |
c08677f98289
6840152: JVM crashes when heavyweight monitors are used
coleenp
parents:
2176
diff
changeset
|
3101 "; ignoring UseBiasedLocking flag." ); |
c08677f98289
6840152: JVM crashes when heavyweight monitors are used
coleenp
parents:
2176
diff
changeset
|
3102 } |
c08677f98289
6840152: JVM crashes when heavyweight monitors are used
coleenp
parents:
2176
diff
changeset
|
3103 UseBiasedLocking = false; |
c08677f98289
6840152: JVM crashes when heavyweight monitors are used
coleenp
parents:
2176
diff
changeset
|
3104 } |
c08677f98289
6840152: JVM crashes when heavyweight monitors are used
coleenp
parents:
2176
diff
changeset
|
3105 |
0 | 3106 #ifdef CC_INTERP |
1131 | 3107 // Clear flags not supported by the C++ interpreter |
3108 FLAG_SET_DEFAULT(ProfileInterpreter, false); | |
0 | 3109 FLAG_SET_DEFAULT(UseBiasedLocking, false); |
1131 | 3110 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false)); |
3111 #endif // CC_INTERP | |
3112 | |
420
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
kvn
parents:
416
diff
changeset
|
3113 #ifdef COMPILER2 |
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
kvn
parents:
416
diff
changeset
|
3114 if (!UseBiasedLocking || EmitSync != 0) { |
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
kvn
parents:
416
diff
changeset
|
3115 UseOptoBiasInlining = false; |
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
kvn
parents:
416
diff
changeset
|
3116 } |
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
kvn
parents:
416
diff
changeset
|
3117 #endif |
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
kvn
parents:
416
diff
changeset
|
3118 |
1155
4e6abf09f540
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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|
3119 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) { |
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3120 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output"); |
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3121 DebugNonSafepoints = true; |
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3122 } |
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|
3123 |
1188
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3124 #ifndef PRODUCT |
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3125 if (CompileTheWorld) { |
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3126 // Force NmethodSweeper to sweep whole CodeCache each time. |
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3127 if (FLAG_IS_DEFAULT(NmethodSweepFraction)) { |
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3128 NmethodSweepFraction = 1; |
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3129 } |
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3130 } |
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|
3131 #endif |
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3132 |
0 | 3133 if (PrintCommandLineFlags) { |
3134 CommandLineFlags::printSetFlags(); | |
3135 } | |
3136 | |
1681
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6953477: Increase portability and flexibility of building Hotspot
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3137 // Apply CPU specific policy for the BiasedLocking |
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3138 if (UseBiasedLocking) { |
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3139 if (!VM_Version::use_biased_locking() && |
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|
3140 !(FLAG_IS_CMDLINE(UseBiasedLocking))) { |
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3141 UseBiasedLocking = false; |
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3142 } |
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|
3143 } |
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|
3144 |
2302
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3145 // set PauseAtExit if the gamma launcher was used and a debugger is attached |
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3146 // but only if not already set on the commandline |
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3147 if (Arguments::created_by_gamma_launcher() && os::is_debugger_attached()) { |
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3148 bool set = false; |
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3149 CommandLineFlags::wasSetOnCmdline("PauseAtExit", &set); |
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|
3150 if (!set) { |
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|
3151 FLAG_SET_DEFAULT(PauseAtExit, true); |
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|
3152 } |
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|
3153 } |
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|
3154 |
0 | 3155 return JNI_OK; |
3156 } | |
3157 | |
3158 int Arguments::PropertyList_count(SystemProperty* pl) { | |
3159 int count = 0; | |
3160 while(pl != NULL) { | |
3161 count++; | |
3162 pl = pl->next(); | |
3163 } | |
3164 return count; | |
3165 } | |
3166 | |
3167 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) { | |
3168 assert(key != NULL, "just checking"); | |
3169 SystemProperty* prop; | |
3170 for (prop = pl; prop != NULL; prop = prop->next()) { | |
3171 if (strcmp(key, prop->key()) == 0) return prop->value(); | |
3172 } | |
3173 return NULL; | |
3174 } | |
3175 | |
3176 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) { | |
3177 int count = 0; | |
3178 const char* ret_val = NULL; | |
3179 | |
3180 while(pl != NULL) { | |
3181 if(count >= index) { | |
3182 ret_val = pl->key(); | |
3183 break; | |
3184 } | |
3185 count++; | |
3186 pl = pl->next(); | |
3187 } | |
3188 | |
3189 return ret_val; | |
3190 } | |
3191 | |
3192 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) { | |
3193 int count = 0; | |
3194 char* ret_val = NULL; | |
3195 | |
3196 while(pl != NULL) { | |
3197 if(count >= index) { | |
3198 ret_val = pl->value(); | |
3199 break; | |
3200 } | |
3201 count++; | |
3202 pl = pl->next(); | |
3203 } | |
3204 | |
3205 return ret_val; | |
3206 } | |
3207 | |
3208 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) { | |
3209 SystemProperty* p = *plist; | |
3210 if (p == NULL) { | |
3211 *plist = new_p; | |
3212 } else { | |
3213 while (p->next() != NULL) { | |
3214 p = p->next(); | |
3215 } | |
3216 p->set_next(new_p); | |
3217 } | |
3218 } | |
3219 | |
3220 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, char* v) { | |
3221 if (plist == NULL) | |
3222 return; | |
3223 | |
3224 SystemProperty* new_p = new SystemProperty(k, v, true); | |
3225 PropertyList_add(plist, new_p); | |
3226 } | |
3227 | |
3228 // This add maintains unique property key in the list. | |
691 | 3229 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, char* v, jboolean append) { |
0 | 3230 if (plist == NULL) |
3231 return; | |
3232 | |
3233 // If property key exist then update with new value. | |
3234 SystemProperty* prop; | |
3235 for (prop = *plist; prop != NULL; prop = prop->next()) { | |
3236 if (strcmp(k, prop->key()) == 0) { | |
691 | 3237 if (append) { |
3238 prop->append_value(v); | |
3239 } else { | |
3240 prop->set_value(v); | |
3241 } | |
0 | 3242 return; |
3243 } | |
3244 } | |
3245 | |
3246 PropertyList_add(plist, k, v); | |
3247 } | |
3248 | |
3249 #ifdef KERNEL | |
3250 char *Arguments::get_kernel_properties() { | |
3251 // Find properties starting with kernel and append them to string | |
3252 // We need to find out how long they are first because the URL's that they | |
3253 // might point to could get long. | |
3254 int length = 0; | |
3255 SystemProperty* prop; | |
3256 for (prop = _system_properties; prop != NULL; prop = prop->next()) { | |
3257 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { | |
3258 length += (strlen(prop->key()) + strlen(prop->value()) + 5); // "-D =" | |
3259 } | |
3260 } | |
3261 // Add one for null terminator. | |
3262 char *props = AllocateHeap(length + 1, "get_kernel_properties"); | |
3263 if (length != 0) { | |
3264 int pos = 0; | |
3265 for (prop = _system_properties; prop != NULL; prop = prop->next()) { | |
3266 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { | |
3267 jio_snprintf(&props[pos], length-pos, | |
3268 "-D%s=%s ", prop->key(), prop->value()); | |
3269 pos = strlen(props); | |
3270 } | |
3271 } | |
3272 } | |
3273 // null terminate props in case of null | |
3274 props[length] = '\0'; | |
3275 return props; | |
3276 } | |
3277 #endif // KERNEL | |
3278 | |
3279 // Copies src into buf, replacing "%%" with "%" and "%p" with pid | |
3280 // Returns true if all of the source pointed by src has been copied over to | |
3281 // the destination buffer pointed by buf. Otherwise, returns false. | |
3282 // Notes: | |
3283 // 1. If the length (buflen) of the destination buffer excluding the | |
3284 // NULL terminator character is not long enough for holding the expanded | |
3285 // pid characters, it also returns false instead of returning the partially | |
3286 // expanded one. | |
3287 // 2. The passed in "buflen" should be large enough to hold the null terminator. | |
3288 bool Arguments::copy_expand_pid(const char* src, size_t srclen, | |
3289 char* buf, size_t buflen) { | |
3290 const char* p = src; | |
3291 char* b = buf; | |
3292 const char* src_end = &src[srclen]; | |
3293 char* buf_end = &buf[buflen - 1]; | |
3294 | |
3295 while (p < src_end && b < buf_end) { | |
3296 if (*p == '%') { | |
3297 switch (*(++p)) { | |
3298 case '%': // "%%" ==> "%" | |
3299 *b++ = *p++; | |
3300 break; | |
3301 case 'p': { // "%p" ==> current process id | |
3302 // buf_end points to the character before the last character so | |
3303 // that we could write '\0' to the end of the buffer. | |
3304 size_t buf_sz = buf_end - b + 1; | |
3305 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id()); | |
3306 | |
3307 // if jio_snprintf fails or the buffer is not long enough to hold | |
3308 // the expanded pid, returns false. | |
3309 if (ret < 0 || ret >= (int)buf_sz) { | |
3310 return false; | |
3311 } else { | |
3312 b += ret; | |
3313 assert(*b == '\0', "fail in copy_expand_pid"); | |
3314 if (p == src_end && b == buf_end + 1) { | |
3315 // reach the end of the buffer. | |
3316 return true; | |
3317 } | |
3318 } | |
3319 p++; | |
3320 break; | |
3321 } | |
3322 default : | |
3323 *b++ = '%'; | |
3324 } | |
3325 } else { | |
3326 *b++ = *p++; | |
3327 } | |
3328 } | |
3329 *b = '\0'; | |
3330 return (p == src_end); // return false if not all of the source was copied | |
3331 } |