Mercurial > hg > truffle
annotate src/share/vm/runtime/arguments.cpp @ 3332:f4063a3503fc
Merge
author | kamg |
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date | Fri, 06 May 2011 11:25:16 -0400 |
parents | 6c978a541c03 567c87d484a0 |
children | 942e888897bc |
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 |
2474 | 62 // Note: This is a special bug reporting site for the JVM |
63 #define DEFAULT_VENDOR_URL_BUG "http://bugreport.sun.com/bugreport/crash.jsp" | |
0 | 64 #define DEFAULT_JAVA_LAUNCHER "generic" |
65 | |
66 char** Arguments::_jvm_flags_array = NULL; | |
67 int Arguments::_num_jvm_flags = 0; | |
68 char** Arguments::_jvm_args_array = NULL; | |
69 int Arguments::_num_jvm_args = 0; | |
70 char* Arguments::_java_command = NULL; | |
71 SystemProperty* Arguments::_system_properties = NULL; | |
72 const char* Arguments::_gc_log_filename = NULL; | |
73 bool Arguments::_has_profile = false; | |
74 bool Arguments::_has_alloc_profile = false; | |
75 uintx Arguments::_min_heap_size = 0; | |
76 Arguments::Mode Arguments::_mode = _mixed; | |
77 bool Arguments::_java_compiler = false; | |
78 bool Arguments::_xdebug_mode = false; | |
79 const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG; | |
80 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER; | |
81 int Arguments::_sun_java_launcher_pid = -1; | |
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82 bool Arguments::_created_by_gamma_launcher = false; |
0 | 83 |
84 // These parameters are reset in method parse_vm_init_args(JavaVMInitArgs*) | |
85 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; | |
86 bool Arguments::_UseOnStackReplacement = UseOnStackReplacement; | |
87 bool Arguments::_BackgroundCompilation = BackgroundCompilation; | |
88 bool Arguments::_ClipInlining = ClipInlining; | |
89 | |
90 char* Arguments::SharedArchivePath = NULL; | |
91 | |
92 AgentLibraryList Arguments::_libraryList; | |
93 AgentLibraryList Arguments::_agentList; | |
94 | |
95 abort_hook_t Arguments::_abort_hook = NULL; | |
96 exit_hook_t Arguments::_exit_hook = NULL; | |
97 vfprintf_hook_t Arguments::_vfprintf_hook = NULL; | |
98 | |
99 | |
100 SystemProperty *Arguments::_java_ext_dirs = NULL; | |
101 SystemProperty *Arguments::_java_endorsed_dirs = NULL; | |
102 SystemProperty *Arguments::_sun_boot_library_path = NULL; | |
103 SystemProperty *Arguments::_java_library_path = NULL; | |
104 SystemProperty *Arguments::_java_home = NULL; | |
105 SystemProperty *Arguments::_java_class_path = NULL; | |
106 SystemProperty *Arguments::_sun_boot_class_path = NULL; | |
107 | |
108 char* Arguments::_meta_index_path = NULL; | |
109 char* Arguments::_meta_index_dir = NULL; | |
110 | |
111 static bool force_client_mode = false; | |
112 | |
113 // Check if head of 'option' matches 'name', and sets 'tail' remaining part of option string | |
114 | |
115 static bool match_option(const JavaVMOption *option, const char* name, | |
116 const char** tail) { | |
117 int len = (int)strlen(name); | |
118 if (strncmp(option->optionString, name, len) == 0) { | |
119 *tail = option->optionString + len; | |
120 return true; | |
121 } else { | |
122 return false; | |
123 } | |
124 } | |
125 | |
126 static void logOption(const char* opt) { | |
127 if (PrintVMOptions) { | |
128 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt); | |
129 } | |
130 } | |
131 | |
132 // Process java launcher properties. | |
133 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) { | |
134 // See if sun.java.launcher or sun.java.launcher.pid is defined. | |
135 // Must do this before setting up other system properties, | |
136 // as some of them may depend on launcher type. | |
137 for (int index = 0; index < args->nOptions; index++) { | |
138 const JavaVMOption* option = args->options + index; | |
139 const char* tail; | |
140 | |
141 if (match_option(option, "-Dsun.java.launcher=", &tail)) { | |
142 process_java_launcher_argument(tail, option->extraInfo); | |
143 continue; | |
144 } | |
145 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) { | |
146 _sun_java_launcher_pid = atoi(tail); | |
147 continue; | |
148 } | |
149 } | |
150 } | |
151 | |
152 // Initialize system properties key and value. | |
153 void Arguments::init_system_properties() { | |
154 | |
155 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name", | |
156 "Java Virtual Machine Specification", false)); | |
157 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false)); | |
158 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false)); | |
159 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true)); | |
160 | |
161 // following are JVMTI agent writeable properties. | |
162 // Properties values are set to NULL and they are | |
163 // os specific they are initialized in os::init_system_properties_values(). | |
164 _java_ext_dirs = new SystemProperty("java.ext.dirs", NULL, true); | |
165 _java_endorsed_dirs = new SystemProperty("java.endorsed.dirs", NULL, true); | |
166 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true); | |
167 _java_library_path = new SystemProperty("java.library.path", NULL, true); | |
168 _java_home = new SystemProperty("java.home", NULL, true); | |
169 _sun_boot_class_path = new SystemProperty("sun.boot.class.path", NULL, true); | |
170 | |
171 _java_class_path = new SystemProperty("java.class.path", "", true); | |
172 | |
173 // Add to System Property list. | |
174 PropertyList_add(&_system_properties, _java_ext_dirs); | |
175 PropertyList_add(&_system_properties, _java_endorsed_dirs); | |
176 PropertyList_add(&_system_properties, _sun_boot_library_path); | |
177 PropertyList_add(&_system_properties, _java_library_path); | |
178 PropertyList_add(&_system_properties, _java_home); | |
179 PropertyList_add(&_system_properties, _java_class_path); | |
180 PropertyList_add(&_system_properties, _sun_boot_class_path); | |
181 | |
182 // Set OS specific system properties values | |
183 os::init_system_properties_values(); | |
184 } | |
185 | |
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186 |
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187 // Update/Initialize System properties after JDK version number is known |
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188 void Arguments::init_version_specific_system_properties() { |
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189 enum { bufsz = 16 }; |
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190 char buffer[bufsz]; |
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191 const char* spec_vendor = "Sun Microsystems Inc."; |
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192 uint32_t spec_version = 0; |
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193 |
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194 if (JDK_Version::is_gte_jdk17x_version()) { |
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195 spec_vendor = "Oracle Corporation"; |
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196 spec_version = JDK_Version::current().major_version(); |
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197 } |
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198 jio_snprintf(buffer, bufsz, "1." UINT32_FORMAT, spec_version); |
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199 |
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200 PropertyList_add(&_system_properties, |
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201 new SystemProperty("java.vm.specification.vendor", spec_vendor, false)); |
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202 PropertyList_add(&_system_properties, |
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203 new SystemProperty("java.vm.specification.version", buffer, false)); |
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204 PropertyList_add(&_system_properties, |
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205 new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false)); |
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206 } |
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207 |
242 | 208 /** |
209 * Provide a slightly more user-friendly way of eliminating -XX flags. | |
210 * When a flag is eliminated, it can be added to this list in order to | |
211 * continue accepting this flag on the command-line, while issuing a warning | |
212 * and ignoring the value. Once the JDK version reaches the 'accept_until' | |
213 * limit, we flatly refuse to admit the existence of the flag. This allows | |
214 * a flag to die correctly over JDK releases using HSX. | |
215 */ | |
216 typedef struct { | |
217 const char* name; | |
218 JDK_Version obsoleted_in; // when the flag went away | |
219 JDK_Version accept_until; // which version to start denying the existence | |
220 } ObsoleteFlag; | |
0 | 221 |
242 | 222 static ObsoleteFlag obsolete_jvm_flags[] = { |
223 { "UseTrainGC", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
224 { "UseSpecialLargeObjectHandling", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
225 { "UseOversizedCarHandling", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
226 { "TraceCarAllocation", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
227 { "PrintTrainGCProcessingStats", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
228 { "LogOfCarSpaceSize", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
229 { "OversizedCarThreshold", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
230 { "MinTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
231 { "DefaultTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
232 { "MaxTickInterval", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
233 { "DelayTickAdjustment", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
234 { "ProcessingToTenuringRatio", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
235 { "MinTrainLength", JDK_Version::jdk(5), JDK_Version::jdk(7) }, | |
236 { "AppendRatio", JDK_Version::jdk_update(6,10), JDK_Version::jdk(7) }, | |
1064 | 237 { "DefaultMaxRAM", JDK_Version::jdk_update(6,18), JDK_Version::jdk(7) }, |
238 { "DefaultInitialRAMFraction", | |
239 JDK_Version::jdk_update(6,18), JDK_Version::jdk(7) }, | |
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240 { "UseDepthFirstScavengeOrder", |
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241 JDK_Version::jdk_update(6,22), JDK_Version::jdk(7) }, |
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242 { "HandlePromotionFailure", |
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243 JDK_Version::jdk_update(6,24), JDK_Version::jdk(8) }, |
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244 { "MaxLiveObjectEvacuationRatio", |
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245 JDK_Version::jdk_update(6,24), JDK_Version::jdk(8) }, |
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246 { "ForceSharedSpaces", JDK_Version::jdk_update(6,25), JDK_Version::jdk(8) }, |
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247 { "UseParallelOldGCCompacting", |
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248 JDK_Version::jdk_update(6,27), JDK_Version::jdk(8) }, |
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249 { "UseParallelDensePrefixUpdate", |
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250 JDK_Version::jdk_update(6,27), JDK_Version::jdk(8) }, |
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251 { "UseParallelOldGCDensePrefix", |
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252 JDK_Version::jdk_update(6,27), JDK_Version::jdk(8) }, |
2460 | 253 { "AllowTransitionalJSR292", JDK_Version::jdk(7), JDK_Version::jdk(8) }, |
242 | 254 { NULL, JDK_Version(0), JDK_Version(0) } |
255 }; | |
256 | |
257 // Returns true if the flag is obsolete and fits into the range specified | |
258 // for being ignored. In the case that the flag is ignored, the 'version' | |
259 // value is filled in with the version number when the flag became | |
260 // obsolete so that that value can be displayed to the user. | |
261 bool Arguments::is_newly_obsolete(const char *s, JDK_Version* version) { | |
0 | 262 int i = 0; |
242 | 263 assert(version != NULL, "Must provide a version buffer"); |
264 while (obsolete_jvm_flags[i].name != NULL) { | |
265 const ObsoleteFlag& flag_status = obsolete_jvm_flags[i]; | |
0 | 266 // <flag>=xxx form |
267 // [-|+]<flag> form | |
242 | 268 if ((strncmp(flag_status.name, s, strlen(flag_status.name)) == 0) || |
0 | 269 ((s[0] == '+' || s[0] == '-') && |
242 | 270 (strncmp(flag_status.name, &s[1], strlen(flag_status.name)) == 0))) { |
271 if (JDK_Version::current().compare(flag_status.accept_until) == -1) { | |
272 *version = flag_status.obsoleted_in; | |
273 return true; | |
274 } | |
0 | 275 } |
276 i++; | |
277 } | |
278 return false; | |
279 } | |
280 | |
281 // Constructs the system class path (aka boot class path) from the following | |
282 // components, in order: | |
283 // | |
284 // prefix // from -Xbootclasspath/p:... | |
285 // endorsed // the expansion of -Djava.endorsed.dirs=... | |
286 // base // from os::get_system_properties() or -Xbootclasspath= | |
287 // suffix // from -Xbootclasspath/a:... | |
288 // | |
289 // java.endorsed.dirs is a list of directories; any jar or zip files in the | |
290 // directories are added to the sysclasspath just before the base. | |
291 // | |
292 // This could be AllStatic, but it isn't needed after argument processing is | |
293 // complete. | |
294 class SysClassPath: public StackObj { | |
295 public: | |
296 SysClassPath(const char* base); | |
297 ~SysClassPath(); | |
298 | |
299 inline void set_base(const char* base); | |
300 inline void add_prefix(const char* prefix); | |
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301 inline void add_suffix_to_prefix(const char* suffix); |
0 | 302 inline void add_suffix(const char* suffix); |
303 inline void reset_path(const char* base); | |
304 | |
305 // Expand the jar/zip files in each directory listed by the java.endorsed.dirs | |
306 // property. Must be called after all command-line arguments have been | |
307 // processed (in particular, -Djava.endorsed.dirs=...) and before calling | |
308 // combined_path(). | |
309 void expand_endorsed(); | |
310 | |
311 inline const char* get_base() const { return _items[_scp_base]; } | |
312 inline const char* get_prefix() const { return _items[_scp_prefix]; } | |
313 inline const char* get_suffix() const { return _items[_scp_suffix]; } | |
314 inline const char* get_endorsed() const { return _items[_scp_endorsed]; } | |
315 | |
316 // Combine all the components into a single c-heap-allocated string; caller | |
317 // must free the string if/when no longer needed. | |
318 char* combined_path(); | |
319 | |
320 private: | |
321 // Utility routines. | |
322 static char* add_to_path(const char* path, const char* str, bool prepend); | |
323 static char* add_jars_to_path(char* path, const char* directory); | |
324 | |
325 inline void reset_item_at(int index); | |
326 | |
327 // Array indices for the items that make up the sysclasspath. All except the | |
328 // base are allocated in the C heap and freed by this class. | |
329 enum { | |
330 _scp_prefix, // from -Xbootclasspath/p:... | |
331 _scp_endorsed, // the expansion of -Djava.endorsed.dirs=... | |
332 _scp_base, // the default sysclasspath | |
333 _scp_suffix, // from -Xbootclasspath/a:... | |
334 _scp_nitems // the number of items, must be last. | |
335 }; | |
336 | |
337 const char* _items[_scp_nitems]; | |
338 DEBUG_ONLY(bool _expansion_done;) | |
339 }; | |
340 | |
341 SysClassPath::SysClassPath(const char* base) { | |
342 memset(_items, 0, sizeof(_items)); | |
343 _items[_scp_base] = base; | |
344 DEBUG_ONLY(_expansion_done = false;) | |
345 } | |
346 | |
347 SysClassPath::~SysClassPath() { | |
348 // Free everything except the base. | |
349 for (int i = 0; i < _scp_nitems; ++i) { | |
350 if (i != _scp_base) reset_item_at(i); | |
351 } | |
352 DEBUG_ONLY(_expansion_done = false;) | |
353 } | |
354 | |
355 inline void SysClassPath::set_base(const char* base) { | |
356 _items[_scp_base] = base; | |
357 } | |
358 | |
359 inline void SysClassPath::add_prefix(const char* prefix) { | |
360 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], prefix, true); | |
361 } | |
362 | |
531
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363 inline void SysClassPath::add_suffix_to_prefix(const char* suffix) { |
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364 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], suffix, false); |
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365 } |
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366 |
0 | 367 inline void SysClassPath::add_suffix(const char* suffix) { |
368 _items[_scp_suffix] = add_to_path(_items[_scp_suffix], suffix, false); | |
369 } | |
370 | |
371 inline void SysClassPath::reset_item_at(int index) { | |
372 assert(index < _scp_nitems && index != _scp_base, "just checking"); | |
373 if (_items[index] != NULL) { | |
374 FREE_C_HEAP_ARRAY(char, _items[index]); | |
375 _items[index] = NULL; | |
376 } | |
377 } | |
378 | |
379 inline void SysClassPath::reset_path(const char* base) { | |
380 // Clear the prefix and suffix. | |
381 reset_item_at(_scp_prefix); | |
382 reset_item_at(_scp_suffix); | |
383 set_base(base); | |
384 } | |
385 | |
386 //------------------------------------------------------------------------------ | |
387 | |
388 void SysClassPath::expand_endorsed() { | |
389 assert(_items[_scp_endorsed] == NULL, "can only be called once."); | |
390 | |
391 const char* path = Arguments::get_property("java.endorsed.dirs"); | |
392 if (path == NULL) { | |
393 path = Arguments::get_endorsed_dir(); | |
394 assert(path != NULL, "no default for java.endorsed.dirs"); | |
395 } | |
396 | |
397 char* expanded_path = NULL; | |
398 const char separator = *os::path_separator(); | |
399 const char* const end = path + strlen(path); | |
400 while (path < end) { | |
401 const char* tmp_end = strchr(path, separator); | |
402 if (tmp_end == NULL) { | |
403 expanded_path = add_jars_to_path(expanded_path, path); | |
404 path = end; | |
405 } else { | |
406 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1); | |
407 memcpy(dirpath, path, tmp_end - path); | |
408 dirpath[tmp_end - path] = '\0'; | |
409 expanded_path = add_jars_to_path(expanded_path, dirpath); | |
410 FREE_C_HEAP_ARRAY(char, dirpath); | |
411 path = tmp_end + 1; | |
412 } | |
413 } | |
414 _items[_scp_endorsed] = expanded_path; | |
415 DEBUG_ONLY(_expansion_done = true;) | |
416 } | |
417 | |
418 // Combine the bootclasspath elements, some of which may be null, into a single | |
419 // c-heap-allocated string. | |
420 char* SysClassPath::combined_path() { | |
421 assert(_items[_scp_base] != NULL, "empty default sysclasspath"); | |
422 assert(_expansion_done, "must call expand_endorsed() first."); | |
423 | |
424 size_t lengths[_scp_nitems]; | |
425 size_t total_len = 0; | |
426 | |
427 const char separator = *os::path_separator(); | |
428 | |
429 // Get the lengths. | |
430 int i; | |
431 for (i = 0; i < _scp_nitems; ++i) { | |
432 if (_items[i] != NULL) { | |
433 lengths[i] = strlen(_items[i]); | |
434 // Include space for the separator char (or a NULL for the last item). | |
435 total_len += lengths[i] + 1; | |
436 } | |
437 } | |
438 assert(total_len > 0, "empty sysclasspath not allowed"); | |
439 | |
440 // Copy the _items to a single string. | |
441 char* cp = NEW_C_HEAP_ARRAY(char, total_len); | |
442 char* cp_tmp = cp; | |
443 for (i = 0; i < _scp_nitems; ++i) { | |
444 if (_items[i] != NULL) { | |
445 memcpy(cp_tmp, _items[i], lengths[i]); | |
446 cp_tmp += lengths[i]; | |
447 *cp_tmp++ = separator; | |
448 } | |
449 } | |
450 *--cp_tmp = '\0'; // Replace the extra separator. | |
451 return cp; | |
452 } | |
453 | |
454 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null. | |
455 char* | |
456 SysClassPath::add_to_path(const char* path, const char* str, bool prepend) { | |
457 char *cp; | |
458 | |
459 assert(str != NULL, "just checking"); | |
460 if (path == NULL) { | |
461 size_t len = strlen(str) + 1; | |
462 cp = NEW_C_HEAP_ARRAY(char, len); | |
463 memcpy(cp, str, len); // copy the trailing null | |
464 } else { | |
465 const char separator = *os::path_separator(); | |
466 size_t old_len = strlen(path); | |
467 size_t str_len = strlen(str); | |
468 size_t len = old_len + str_len + 2; | |
469 | |
470 if (prepend) { | |
471 cp = NEW_C_HEAP_ARRAY(char, len); | |
472 char* cp_tmp = cp; | |
473 memcpy(cp_tmp, str, str_len); | |
474 cp_tmp += str_len; | |
475 *cp_tmp = separator; | |
476 memcpy(++cp_tmp, path, old_len + 1); // copy the trailing null | |
477 FREE_C_HEAP_ARRAY(char, path); | |
478 } else { | |
479 cp = REALLOC_C_HEAP_ARRAY(char, path, len); | |
480 char* cp_tmp = cp + old_len; | |
481 *cp_tmp = separator; | |
482 memcpy(++cp_tmp, str, str_len + 1); // copy the trailing null | |
483 } | |
484 } | |
485 return cp; | |
486 } | |
487 | |
488 // Scan the directory and append any jar or zip files found to path. | |
489 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null. | |
490 char* SysClassPath::add_jars_to_path(char* path, const char* directory) { | |
491 DIR* dir = os::opendir(directory); | |
492 if (dir == NULL) return path; | |
493 | |
494 char dir_sep[2] = { '\0', '\0' }; | |
495 size_t directory_len = strlen(directory); | |
496 const char fileSep = *os::file_separator(); | |
497 if (directory[directory_len - 1] != fileSep) dir_sep[0] = fileSep; | |
498 | |
499 /* Scan the directory for jars/zips, appending them to path. */ | |
500 struct dirent *entry; | |
501 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory)); | |
502 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL) { | |
503 const char* name = entry->d_name; | |
504 const char* ext = name + strlen(name) - 4; | |
505 bool isJarOrZip = ext > name && | |
506 (os::file_name_strcmp(ext, ".jar") == 0 || | |
507 os::file_name_strcmp(ext, ".zip") == 0); | |
508 if (isJarOrZip) { | |
509 char* jarpath = NEW_C_HEAP_ARRAY(char, directory_len + 2 + strlen(name)); | |
510 sprintf(jarpath, "%s%s%s", directory, dir_sep, name); | |
511 path = add_to_path(path, jarpath, false); | |
512 FREE_C_HEAP_ARRAY(char, jarpath); | |
513 } | |
514 } | |
515 FREE_C_HEAP_ARRAY(char, dbuf); | |
516 os::closedir(dir); | |
517 return path; | |
518 } | |
519 | |
520 // Parses a memory size specification string. | |
489
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521 static bool atomull(const char *s, julong* result) { |
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522 julong n = 0; |
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523 int args_read = sscanf(s, os::julong_format_specifier(), &n); |
0 | 524 if (args_read != 1) { |
525 return false; | |
526 } | |
527 while (*s != '\0' && isdigit(*s)) { | |
528 s++; | |
529 } | |
530 // 4705540: illegal if more characters are found after the first non-digit | |
531 if (strlen(s) > 1) { | |
532 return false; | |
533 } | |
534 switch (*s) { | |
535 case 'T': case 't': | |
536 *result = n * G * K; | |
489
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537 // Check for overflow. |
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538 if (*result/((julong)G * K) != n) return false; |
0 | 539 return true; |
540 case 'G': case 'g': | |
541 *result = n * G; | |
489
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542 if (*result/G != n) return false; |
0 | 543 return true; |
544 case 'M': case 'm': | |
545 *result = n * M; | |
489
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546 if (*result/M != n) return false; |
0 | 547 return true; |
548 case 'K': case 'k': | |
549 *result = n * K; | |
489
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550 if (*result/K != n) return false; |
0 | 551 return true; |
552 case '\0': | |
553 *result = n; | |
554 return true; | |
555 default: | |
556 return false; | |
557 } | |
558 } | |
559 | |
489
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560 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size) { |
0 | 561 if (size < min_size) return arg_too_small; |
562 // Check that size will fit in a size_t (only relevant on 32-bit) | |
489
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563 if (size > max_uintx) return arg_too_big; |
0 | 564 return arg_in_range; |
565 } | |
566 | |
567 // Describe an argument out of range error | |
568 void Arguments::describe_range_error(ArgsRange errcode) { | |
569 switch(errcode) { | |
570 case arg_too_big: | |
571 jio_fprintf(defaultStream::error_stream(), | |
572 "The specified size exceeds the maximum " | |
573 "representable size.\n"); | |
574 break; | |
575 case arg_too_small: | |
576 case arg_unreadable: | |
577 case arg_in_range: | |
578 // do nothing for now | |
579 break; | |
580 default: | |
581 ShouldNotReachHere(); | |
582 } | |
583 } | |
584 | |
585 static bool set_bool_flag(char* name, bool value, FlagValueOrigin origin) { | |
586 return CommandLineFlags::boolAtPut(name, &value, origin); | |
587 } | |
588 | |
589 static bool set_fp_numeric_flag(char* name, char* value, FlagValueOrigin origin) { | |
590 double v; | |
591 if (sscanf(value, "%lf", &v) != 1) { | |
592 return false; | |
593 } | |
594 | |
595 if (CommandLineFlags::doubleAtPut(name, &v, origin)) { | |
596 return true; | |
597 } | |
598 return false; | |
599 } | |
600 | |
601 static bool set_numeric_flag(char* name, char* value, FlagValueOrigin origin) { | |
489
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602 julong v; |
0 | 603 intx intx_v; |
604 bool is_neg = false; | |
489
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605 // Check the sign first since atomull() parses only unsigned values. |
0 | 606 if (*value == '-') { |
607 if (!CommandLineFlags::intxAt(name, &intx_v)) { | |
608 return false; | |
609 } | |
610 value++; | |
611 is_neg = true; | |
612 } | |
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613 if (!atomull(value, &v)) { |
0 | 614 return false; |
615 } | |
616 intx_v = (intx) v; | |
617 if (is_neg) { | |
618 intx_v = -intx_v; | |
619 } | |
620 if (CommandLineFlags::intxAtPut(name, &intx_v, origin)) { | |
621 return true; | |
622 } | |
623 uintx uintx_v = (uintx) v; | |
624 if (!is_neg && CommandLineFlags::uintxAtPut(name, &uintx_v, origin)) { | |
625 return true; | |
626 } | |
1064 | 627 uint64_t uint64_t_v = (uint64_t) v; |
628 if (!is_neg && CommandLineFlags::uint64_tAtPut(name, &uint64_t_v, origin)) { | |
629 return true; | |
630 } | |
0 | 631 return false; |
632 } | |
633 | |
634 static bool set_string_flag(char* name, const char* value, FlagValueOrigin origin) { | |
635 if (!CommandLineFlags::ccstrAtPut(name, &value, origin)) return false; | |
636 // Contract: CommandLineFlags always returns a pointer that needs freeing. | |
637 FREE_C_HEAP_ARRAY(char, value); | |
638 return true; | |
639 } | |
640 | |
641 static bool append_to_string_flag(char* name, const char* new_value, FlagValueOrigin origin) { | |
642 const char* old_value = ""; | |
643 if (!CommandLineFlags::ccstrAt(name, &old_value)) return false; | |
644 size_t old_len = old_value != NULL ? strlen(old_value) : 0; | |
645 size_t new_len = strlen(new_value); | |
646 const char* value; | |
647 char* free_this_too = NULL; | |
648 if (old_len == 0) { | |
649 value = new_value; | |
650 } else if (new_len == 0) { | |
651 value = old_value; | |
652 } else { | |
653 char* buf = NEW_C_HEAP_ARRAY(char, old_len + 1 + new_len + 1); | |
654 // each new setting adds another LINE to the switch: | |
655 sprintf(buf, "%s\n%s", old_value, new_value); | |
656 value = buf; | |
657 free_this_too = buf; | |
658 } | |
659 (void) CommandLineFlags::ccstrAtPut(name, &value, origin); | |
660 // CommandLineFlags always returns a pointer that needs freeing. | |
661 FREE_C_HEAP_ARRAY(char, value); | |
662 if (free_this_too != NULL) { | |
663 // CommandLineFlags made its own copy, so I must delete my own temp. buffer. | |
664 FREE_C_HEAP_ARRAY(char, free_this_too); | |
665 } | |
666 return true; | |
667 } | |
668 | |
669 bool Arguments::parse_argument(const char* arg, FlagValueOrigin origin) { | |
670 | |
671 // range of acceptable characters spelled out for portability reasons | |
672 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]" | |
673 #define BUFLEN 255 | |
674 char name[BUFLEN+1]; | |
675 char dummy; | |
676 | |
677 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { | |
678 return set_bool_flag(name, false, origin); | |
679 } | |
680 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) { | |
681 return set_bool_flag(name, true, origin); | |
682 } | |
683 | |
684 char punct; | |
685 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') { | |
686 const char* value = strchr(arg, '=') + 1; | |
687 Flag* flag = Flag::find_flag(name, strlen(name)); | |
688 if (flag != NULL && flag->is_ccstr()) { | |
689 if (flag->ccstr_accumulates()) { | |
690 return append_to_string_flag(name, value, origin); | |
691 } else { | |
692 if (value[0] == '\0') { | |
693 value = NULL; | |
694 } | |
695 return set_string_flag(name, value, origin); | |
696 } | |
697 } | |
698 } | |
699 | |
700 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') { | |
701 const char* value = strchr(arg, '=') + 1; | |
702 // -XX:Foo:=xxx will reset the string flag to the given value. | |
703 if (value[0] == '\0') { | |
704 value = NULL; | |
705 } | |
706 return set_string_flag(name, value, origin); | |
707 } | |
708 | |
709 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.]" | |
710 #define SIGNED_NUMBER_RANGE "[-0123456789]" | |
711 #define NUMBER_RANGE "[0123456789]" | |
712 char value[BUFLEN + 1]; | |
713 char value2[BUFLEN + 1]; | |
714 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) { | |
715 // Looks like a floating-point number -- try again with more lenient format string | |
716 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) { | |
717 return set_fp_numeric_flag(name, value, origin); | |
718 } | |
719 } | |
720 | |
721 #define VALUE_RANGE "[-kmgtKMGT0123456789]" | |
722 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) { | |
723 return set_numeric_flag(name, value, origin); | |
724 } | |
725 | |
726 return false; | |
727 } | |
728 | |
729 void Arguments::add_string(char*** bldarray, int* count, const char* arg) { | |
730 assert(bldarray != NULL, "illegal argument"); | |
731 | |
732 if (arg == NULL) { | |
733 return; | |
734 } | |
735 | |
736 int index = *count; | |
737 | |
738 // expand the array and add arg to the last element | |
739 (*count)++; | |
740 if (*bldarray == NULL) { | |
741 *bldarray = NEW_C_HEAP_ARRAY(char*, *count); | |
742 } else { | |
743 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, *count); | |
744 } | |
745 (*bldarray)[index] = strdup(arg); | |
746 } | |
747 | |
748 void Arguments::build_jvm_args(const char* arg) { | |
749 add_string(&_jvm_args_array, &_num_jvm_args, arg); | |
750 } | |
751 | |
752 void Arguments::build_jvm_flags(const char* arg) { | |
753 add_string(&_jvm_flags_array, &_num_jvm_flags, arg); | |
754 } | |
755 | |
756 // utility function to return a string that concatenates all | |
757 // strings in a given char** array | |
758 const char* Arguments::build_resource_string(char** args, int count) { | |
759 if (args == NULL || count == 0) { | |
760 return NULL; | |
761 } | |
762 size_t length = strlen(args[0]) + 1; // add 1 for the null terminator | |
763 for (int i = 1; i < count; i++) { | |
764 length += strlen(args[i]) + 1; // add 1 for a space | |
765 } | |
766 char* s = NEW_RESOURCE_ARRAY(char, length); | |
767 strcpy(s, args[0]); | |
768 for (int j = 1; j < count; j++) { | |
769 strcat(s, " "); | |
770 strcat(s, args[j]); | |
771 } | |
772 return (const char*) s; | |
773 } | |
774 | |
775 void Arguments::print_on(outputStream* st) { | |
776 st->print_cr("VM Arguments:"); | |
777 if (num_jvm_flags() > 0) { | |
778 st->print("jvm_flags: "); print_jvm_flags_on(st); | |
779 } | |
780 if (num_jvm_args() > 0) { | |
781 st->print("jvm_args: "); print_jvm_args_on(st); | |
782 } | |
783 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>"); | |
784 st->print_cr("Launcher Type: %s", _sun_java_launcher); | |
785 } | |
786 | |
787 void Arguments::print_jvm_flags_on(outputStream* st) { | |
788 if (_num_jvm_flags > 0) { | |
789 for (int i=0; i < _num_jvm_flags; i++) { | |
790 st->print("%s ", _jvm_flags_array[i]); | |
791 } | |
792 st->print_cr(""); | |
793 } | |
794 } | |
795 | |
796 void Arguments::print_jvm_args_on(outputStream* st) { | |
797 if (_num_jvm_args > 0) { | |
798 for (int i=0; i < _num_jvm_args; i++) { | |
799 st->print("%s ", _jvm_args_array[i]); | |
800 } | |
801 st->print_cr(""); | |
802 } | |
803 } | |
804 | |
242 | 805 bool Arguments::process_argument(const char* arg, |
806 jboolean ignore_unrecognized, FlagValueOrigin origin) { | |
807 | |
808 JDK_Version since = JDK_Version(); | |
0 | 809 |
3250 | 810 if (parse_argument(arg, origin) || ignore_unrecognized) { |
811 return true; | |
0 | 812 } |
3250 | 813 |
814 const char * const argname = *arg == '+' || *arg == '-' ? arg + 1 : arg; | |
815 if (is_newly_obsolete(arg, &since)) { | |
816 char version[256]; | |
817 since.to_string(version, sizeof(version)); | |
818 warning("ignoring option %s; support was removed in %s", argname, version); | |
819 return true; | |
820 } | |
821 | |
822 jio_fprintf(defaultStream::error_stream(), | |
823 "Unrecognized VM option '%s'\n", argname); | |
824 // allow for commandline "commenting out" options like -XX:#+Verbose | |
825 return arg[0] == '#'; | |
0 | 826 } |
827 | |
828 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) { | |
829 FILE* stream = fopen(file_name, "rb"); | |
830 if (stream == NULL) { | |
831 if (should_exist) { | |
832 jio_fprintf(defaultStream::error_stream(), | |
833 "Could not open settings file %s\n", file_name); | |
834 return false; | |
835 } else { | |
836 return true; | |
837 } | |
838 } | |
839 | |
840 char token[1024]; | |
841 int pos = 0; | |
842 | |
843 bool in_white_space = true; | |
844 bool in_comment = false; | |
845 bool in_quote = false; | |
846 char quote_c = 0; | |
847 bool result = true; | |
848 | |
849 int c = getc(stream); | |
850 while(c != EOF) { | |
851 if (in_white_space) { | |
852 if (in_comment) { | |
853 if (c == '\n') in_comment = false; | |
854 } else { | |
855 if (c == '#') in_comment = true; | |
856 else if (!isspace(c)) { | |
857 in_white_space = false; | |
858 token[pos++] = c; | |
859 } | |
860 } | |
861 } else { | |
862 if (c == '\n' || (!in_quote && isspace(c))) { | |
863 // token ends at newline, or at unquoted whitespace | |
864 // this allows a way to include spaces in string-valued options | |
865 token[pos] = '\0'; | |
866 logOption(token); | |
867 result &= process_argument(token, ignore_unrecognized, CONFIG_FILE); | |
868 build_jvm_flags(token); | |
869 pos = 0; | |
870 in_white_space = true; | |
871 in_quote = false; | |
872 } else if (!in_quote && (c == '\'' || c == '"')) { | |
873 in_quote = true; | |
874 quote_c = c; | |
875 } else if (in_quote && (c == quote_c)) { | |
876 in_quote = false; | |
877 } else { | |
878 token[pos++] = c; | |
879 } | |
880 } | |
881 c = getc(stream); | |
882 } | |
883 if (pos > 0) { | |
884 token[pos] = '\0'; | |
885 result &= process_argument(token, ignore_unrecognized, CONFIG_FILE); | |
886 build_jvm_flags(token); | |
887 } | |
888 fclose(stream); | |
889 return result; | |
890 } | |
891 | |
892 //============================================================================================================= | |
893 // Parsing of properties (-D) | |
894 | |
895 const char* Arguments::get_property(const char* key) { | |
896 return PropertyList_get_value(system_properties(), key); | |
897 } | |
898 | |
899 bool Arguments::add_property(const char* prop) { | |
900 const char* eq = strchr(prop, '='); | |
901 char* key; | |
902 // ns must be static--its address may be stored in a SystemProperty object. | |
903 const static char ns[1] = {0}; | |
904 char* value = (char *)ns; | |
905 | |
906 size_t key_len = (eq == NULL) ? strlen(prop) : (eq - prop); | |
907 key = AllocateHeap(key_len + 1, "add_property"); | |
908 strncpy(key, prop, key_len); | |
909 key[key_len] = '\0'; | |
910 | |
911 if (eq != NULL) { | |
912 size_t value_len = strlen(prop) - key_len - 1; | |
913 value = AllocateHeap(value_len + 1, "add_property"); | |
914 strncpy(value, &prop[key_len + 1], value_len + 1); | |
915 } | |
916 | |
917 if (strcmp(key, "java.compiler") == 0) { | |
918 process_java_compiler_argument(value); | |
919 FreeHeap(key); | |
920 if (eq != NULL) { | |
921 FreeHeap(value); | |
922 } | |
923 return true; | |
691 | 924 } else if (strcmp(key, "sun.java.command") == 0) { |
0 | 925 _java_command = value; |
926 | |
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927 // Record value in Arguments, but let it get passed to Java. |
691 | 928 } else if (strcmp(key, "sun.java.launcher.pid") == 0) { |
0 | 929 // launcher.pid property is private and is processed |
930 // in process_sun_java_launcher_properties(); | |
931 // the sun.java.launcher property is passed on to the java application | |
932 FreeHeap(key); | |
933 if (eq != NULL) { | |
934 FreeHeap(value); | |
935 } | |
936 return true; | |
691 | 937 } else if (strcmp(key, "java.vendor.url.bug") == 0) { |
0 | 938 // save it in _java_vendor_url_bug, so JVM fatal error handler can access |
939 // its value without going through the property list or making a Java call. | |
940 _java_vendor_url_bug = value; | |
691 | 941 } else if (strcmp(key, "sun.boot.library.path") == 0) { |
942 PropertyList_unique_add(&_system_properties, key, value, true); | |
943 return true; | |
0 | 944 } |
945 // Create new property and add at the end of the list | |
946 PropertyList_unique_add(&_system_properties, key, value); | |
947 return true; | |
948 } | |
949 | |
950 //=========================================================================================================== | |
951 // Setting int/mixed/comp mode flags | |
952 | |
953 void Arguments::set_mode_flags(Mode mode) { | |
954 // Set up default values for all flags. | |
955 // If you add a flag to any of the branches below, | |
956 // add a default value for it here. | |
957 set_java_compiler(false); | |
958 _mode = mode; | |
959 | |
960 // Ensure Agent_OnLoad has the correct initial values. | |
961 // This may not be the final mode; mode may change later in onload phase. | |
962 PropertyList_unique_add(&_system_properties, "java.vm.info", | |
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963 (char*)VM_Version::vm_info_string(), false); |
0 | 964 |
965 UseInterpreter = true; | |
966 UseCompiler = true; | |
967 UseLoopCounter = true; | |
968 | |
2458
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969 #ifndef ZERO |
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970 // Turn these off for mixed and comp. Leave them on for Zero. |
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971 if (FLAG_IS_DEFAULT(UseFastAccessorMethods)) { |
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972 UseFastAccessorMethods = mode == _int; |
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973 } |
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974 if (FLAG_IS_DEFAULT(UseFastEmptyMethods)) { |
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975 UseFastEmptyMethods = mode == _int; |
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976 } |
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977 #endif |
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978 |
0 | 979 // Default values may be platform/compiler dependent - |
980 // use the saved values | |
981 ClipInlining = Arguments::_ClipInlining; | |
982 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods; | |
983 UseOnStackReplacement = Arguments::_UseOnStackReplacement; | |
984 BackgroundCompilation = Arguments::_BackgroundCompilation; | |
985 | |
986 // Change from defaults based on mode | |
987 switch (mode) { | |
988 default: | |
989 ShouldNotReachHere(); | |
990 break; | |
991 case _int: | |
992 UseCompiler = false; | |
993 UseLoopCounter = false; | |
994 AlwaysCompileLoopMethods = false; | |
995 UseOnStackReplacement = false; | |
996 break; | |
997 case _mixed: | |
998 // same as default | |
999 break; | |
1000 case _comp: | |
1001 UseInterpreter = false; | |
1002 BackgroundCompilation = false; | |
1003 ClipInlining = false; | |
1004 break; | |
1005 } | |
1006 } | |
1007 | |
1008 // Conflict: required to use shared spaces (-Xshare:on), but | |
1009 // incompatible command line options were chosen. | |
1010 | |
1011 static void no_shared_spaces() { | |
1012 if (RequireSharedSpaces) { | |
1013 jio_fprintf(defaultStream::error_stream(), | |
1014 "Class data sharing is inconsistent with other specified options.\n"); | |
1015 vm_exit_during_initialization("Unable to use shared archive.", NULL); | |
1016 } else { | |
1017 FLAG_SET_DEFAULT(UseSharedSpaces, false); | |
1018 } | |
1019 } | |
1020 | |
1783 | 1021 void Arguments::set_tiered_flags() { |
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1022 // With tiered, set default policy to AdvancedThresholdPolicy, which is 3. |
1783 | 1023 if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) { |
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1024 FLAG_SET_DEFAULT(CompilationPolicyChoice, 3); |
1783 | 1025 } |
1026 if (CompilationPolicyChoice < 2) { | |
1027 vm_exit_during_initialization( | |
1028 "Incompatible compilation policy selected", NULL); | |
1029 } | |
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1030 // Increase the code cache size - tiered compiles a lot more. |
1783 | 1031 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) { |
1032 FLAG_SET_DEFAULT(ReservedCodeCacheSize, ReservedCodeCacheSize * 2); | |
1033 } | |
1034 } | |
1035 | |
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1036 #ifndef KERNEL |
0 | 1037 // If the user has chosen ParallelGCThreads > 0, we set UseParNewGC |
1038 // if it's not explictly set or unset. If the user has chosen | |
1039 // UseParNewGC and not explicitly set ParallelGCThreads we | |
1040 // set it, unless this is a single cpu machine. | |
1041 void Arguments::set_parnew_gc_flags() { | |
1064 | 1042 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC && !UseG1GC, |
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1043 "control point invariant"); |
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1044 assert(UseParNewGC, "Error"); |
0 | 1045 |
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1046 // Turn off AdaptiveSizePolicy by default for parnew until it is |
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1047 // complete. |
342
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1048 if (FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) { |
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1049 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); |
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1050 } |
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1051 |
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1052 if (ParallelGCThreads == 0) { |
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1053 FLAG_SET_DEFAULT(ParallelGCThreads, |
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1054 Abstract_VM_Version::parallel_worker_threads()); |
1064 | 1055 if (ParallelGCThreads == 1) { |
0 | 1056 FLAG_SET_DEFAULT(UseParNewGC, false); |
1064 | 1057 FLAG_SET_DEFAULT(ParallelGCThreads, 0); |
0 | 1058 } |
1059 } | |
1064 | 1060 if (UseParNewGC) { |
1061 // CDS doesn't work with ParNew yet | |
0 | 1062 no_shared_spaces(); |
1063 | |
695 | 1064 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 respectively, |
0 | 1065 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration |
1066 // we set them to 1024 and 1024. | |
1067 // See CR 6362902. | |
1068 if (FLAG_IS_DEFAULT(YoungPLABSize)) { | |
1069 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024); | |
1070 } | |
1071 if (FLAG_IS_DEFAULT(OldPLABSize)) { | |
1072 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024); | |
1073 } | |
1074 | |
1064 | 1075 // AlwaysTenure flag should make ParNew promote all at first collection. |
0 | 1076 // See CR 6362902. |
1077 if (AlwaysTenure) { | |
1078 FLAG_SET_CMDLINE(intx, MaxTenuringThreshold, 0); | |
1079 } | |
695 | 1080 // When using compressed oops, we use local overflow stacks, |
1081 // rather than using a global overflow list chained through | |
1082 // the klass word of the object's pre-image. | |
1083 if (UseCompressedOops && !ParGCUseLocalOverflow) { | |
1084 if (!FLAG_IS_DEFAULT(ParGCUseLocalOverflow)) { | |
1085 warning("Forcing +ParGCUseLocalOverflow: needed if using compressed references"); | |
1086 } | |
1087 FLAG_SET_DEFAULT(ParGCUseLocalOverflow, true); | |
1088 } | |
1089 assert(ParGCUseLocalOverflow || !UseCompressedOops, "Error"); | |
0 | 1090 } |
1091 } | |
1092 | |
1093 // Adjust some sizes to suit CMS and/or ParNew needs; these work well on | |
1094 // sparc/solaris for certain applications, but would gain from | |
1095 // further optimization and tuning efforts, and would almost | |
1096 // certainly gain from analysis of platform and environment. | |
1097 void Arguments::set_cms_and_parnew_gc_flags() { | |
1064 | 1098 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC, "Error"); |
10
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1099 assert(UseConcMarkSweepGC, "CMS is expected to be on here"); |
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1100 |
0 | 1101 // If we are using CMS, we prefer to UseParNewGC, |
1102 // unless explicitly forbidden. | |
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1103 if (FLAG_IS_DEFAULT(UseParNewGC)) { |
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1104 FLAG_SET_ERGO(bool, UseParNewGC, true); |
0 | 1105 } |
1106 | |
1107 // Turn off AdaptiveSizePolicy by default for cms until it is | |
10
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1108 // complete. |
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1109 if (FLAG_IS_DEFAULT(UseAdaptiveSizePolicy)) { |
0 | 1110 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false); |
1111 } | |
1112 | |
1113 // In either case, adjust ParallelGCThreads and/or UseParNewGC | |
1114 // as needed. | |
10
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1115 if (UseParNewGC) { |
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1116 set_parnew_gc_flags(); |
0 | 1117 } |
1118 | |
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1119 // MaxHeapSize is aligned down in collectorPolicy |
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1120 size_t max_heap = align_size_down(MaxHeapSize, |
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1121 CardTableRS::ct_max_alignment_constraint()); |
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1122 |
0 | 1123 // Now make adjustments for CMS |
2368
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1124 intx tenuring_default = (intx)6; |
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1125 size_t young_gen_per_worker = CMSYoungGenPerWorker; |
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1126 |
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1127 // Preferred young gen size for "short" pauses: |
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1128 // upper bound depends on # of threads and NewRatio. |
0 | 1129 const uintx parallel_gc_threads = |
1130 (ParallelGCThreads == 0 ? 1 : ParallelGCThreads); | |
1131 const size_t preferred_max_new_size_unaligned = | |
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1132 MIN2(max_heap/(NewRatio+1), ScaleForWordSize(young_gen_per_worker * parallel_gc_threads)); |
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1133 size_t preferred_max_new_size = |
0 | 1134 align_size_up(preferred_max_new_size_unaligned, os::vm_page_size()); |
1135 | |
1136 // Unless explicitly requested otherwise, size young gen | |
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1137 // for "short" pauses ~ CMSYoungGenPerWorker*ParallelGCThreads |
886
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1138 |
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1139 // If either MaxNewSize or NewRatio is set on the command line, |
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1140 // assume the user is trying to set the size of the young gen. |
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1141 if (FLAG_IS_DEFAULT(MaxNewSize) && FLAG_IS_DEFAULT(NewRatio)) { |
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1142 |
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1143 // Set MaxNewSize to our calculated preferred_max_new_size unless |
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1144 // NewSize was set on the command line and it is larger than |
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1145 // preferred_max_new_size. |
0 | 1146 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line |
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1147 FLAG_SET_ERGO(uintx, MaxNewSize, MAX2(NewSize, preferred_max_new_size)); |
0 | 1148 } else { |
13
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1149 FLAG_SET_ERGO(uintx, MaxNewSize, preferred_max_new_size); |
0 | 1150 } |
1064 | 1151 if (PrintGCDetails && Verbose) { |
13
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1152 // Too early to use gclog_or_tty |
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1153 tty->print_cr("CMS ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize); |
886
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1154 } |
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1155 |
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1156 // Code along this path potentially sets NewSize and OldSize |
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1157 |
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1158 assert(max_heap >= InitialHeapSize, "Error"); |
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1159 assert(max_heap >= NewSize, "Error"); |
0 | 1160 |
1064 | 1161 if (PrintGCDetails && Verbose) { |
13
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1162 // Too early to use gclog_or_tty |
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1163 tty->print_cr("CMS set min_heap_size: " SIZE_FORMAT |
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1164 " initial_heap_size: " SIZE_FORMAT |
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1165 " max_heap: " SIZE_FORMAT, |
1064 | 1166 min_heap_size(), InitialHeapSize, max_heap); |
13
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1167 } |
2368
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1168 size_t min_new = preferred_max_new_size; |
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1169 if (FLAG_IS_CMDLINE(NewSize)) { |
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1170 min_new = NewSize; |
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1171 } |
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1172 if (max_heap > min_new && min_heap_size() > min_new) { |
0 | 1173 // Unless explicitly requested otherwise, make young gen |
1174 // at least min_new, and at most preferred_max_new_size. | |
1175 if (FLAG_IS_DEFAULT(NewSize)) { | |
13
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1176 FLAG_SET_ERGO(uintx, NewSize, MAX2(NewSize, min_new)); |
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1177 FLAG_SET_ERGO(uintx, NewSize, MIN2(preferred_max_new_size, NewSize)); |
1064 | 1178 if (PrintGCDetails && Verbose) { |
13
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1179 // Too early to use gclog_or_tty |
2368
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1180 tty->print_cr("CMS ergo set NewSize: " SIZE_FORMAT, NewSize); |
13
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1181 } |
0 | 1182 } |
1183 // Unless explicitly requested otherwise, size old gen | |
2368
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1184 // so it's NewRatio x of NewSize. |
0 | 1185 if (FLAG_IS_DEFAULT(OldSize)) { |
1186 if (max_heap > NewSize) { | |
2368
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1187 FLAG_SET_ERGO(uintx, OldSize, MIN2(NewRatio*NewSize, max_heap - NewSize)); |
1064 | 1188 if (PrintGCDetails && Verbose) { |
13
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1189 // Too early to use gclog_or_tty |
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1190 tty->print_cr("CMS ergo set OldSize: " SIZE_FORMAT, OldSize); |
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1191 } |
0 | 1192 } |
1193 } | |
1194 } | |
1195 } | |
1196 // Unless explicitly requested otherwise, definitely | |
1197 // promote all objects surviving "tenuring_default" scavenges. | |
1198 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) && | |
1199 FLAG_IS_DEFAULT(SurvivorRatio)) { | |
13
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1200 FLAG_SET_ERGO(intx, MaxTenuringThreshold, tenuring_default); |
0 | 1201 } |
1202 // If we decided above (or user explicitly requested) | |
1203 // `promote all' (via MaxTenuringThreshold := 0), | |
1204 // prefer minuscule survivor spaces so as not to waste | |
1205 // space for (non-existent) survivors | |
1206 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) { | |
13
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1207 FLAG_SET_ERGO(intx, SurvivorRatio, MAX2((intx)1024, SurvivorRatio)); |
0 | 1208 } |
1209 // If OldPLABSize is set and CMSParPromoteBlocksToClaim is not, | |
1210 // set CMSParPromoteBlocksToClaim equal to OldPLABSize. | |
1211 // This is done in order to make ParNew+CMS configuration to work | |
1212 // with YoungPLABSize and OldPLABSize options. | |
1213 // See CR 6362902. | |
1214 if (!FLAG_IS_DEFAULT(OldPLABSize)) { | |
1215 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) { | |
13
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1216 // OldPLABSize is not the default value but CMSParPromoteBlocksToClaim |
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1217 // is. In this situtation let CMSParPromoteBlocksToClaim follow |
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1218 // the value (either from the command line or ergonomics) of |
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1219 // OldPLABSize. Following OldPLABSize is an ergonomics decision. |
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1220 FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, OldPLABSize); |
1145
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1221 } else { |
0 | 1222 // OldPLABSize and CMSParPromoteBlocksToClaim are both set. |
1223 // CMSParPromoteBlocksToClaim is a collector-specific flag, so | |
1224 // we'll let it to take precedence. | |
1225 jio_fprintf(defaultStream::error_stream(), | |
886
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1226 "Both OldPLABSize and CMSParPromoteBlocksToClaim" |
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1227 " options are specified for the CMS collector." |
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1228 " CMSParPromoteBlocksToClaim will take precedence.\n"); |
0 | 1229 } |
1230 } | |
1145
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1231 if (!FLAG_IS_DEFAULT(ResizeOldPLAB) && !ResizeOldPLAB) { |
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1232 // OldPLAB sizing manually turned off: Use a larger default setting, |
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1233 // unless it was manually specified. This is because a too-low value |
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1234 // will slow down scavenges. |
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1235 if (FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim)) { |
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1236 FLAG_SET_ERGO(uintx, CMSParPromoteBlocksToClaim, 50); // default value before 6631166 |
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1237 } |
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1238 } |
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1239 // Overwrite OldPLABSize which is the variable we will internally use everywhere. |
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1240 FLAG_SET_ERGO(uintx, OldPLABSize, CMSParPromoteBlocksToClaim); |
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1241 // If either of the static initialization defaults have changed, note this |
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1242 // modification. |
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1243 if (!FLAG_IS_DEFAULT(CMSParPromoteBlocksToClaim) || !FLAG_IS_DEFAULT(OldPLABWeight)) { |
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1244 CFLS_LAB::modify_initialization(OldPLABSize, OldPLABWeight); |
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1245 } |
1284 | 1246 if (PrintGCDetails && Verbose) { |
1247 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk", | |
1248 MarkStackSize / K, MarkStackSizeMax / K); | |
1249 tty->print_cr("ConcGCThreads: %u", ConcGCThreads); | |
1250 } | |
0 | 1251 } |
1145
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1252 #endif // KERNEL |
0 | 1253 |
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1254 void set_object_alignment() { |
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1255 // Object alignment. |
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1256 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2"); |
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1257 MinObjAlignmentInBytes = ObjectAlignmentInBytes; |
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1258 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small"); |
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1259 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize; |
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1260 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect"); |
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1261 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1; |
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1262 |
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1263 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes); |
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1264 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize; |
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1265 |
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1266 // Oop encoding heap max |
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1267 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes; |
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1268 |
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1269 #ifndef KERNEL |
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1270 // Set CMS global values |
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1271 CompactibleFreeListSpace::set_cms_values(); |
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1272 #endif // KERNEL |
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1273 } |
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1274 |
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1275 bool verify_object_alignment() { |
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1276 // Object alignment. |
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1277 if (!is_power_of_2(ObjectAlignmentInBytes)) { |
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1278 jio_fprintf(defaultStream::error_stream(), |
1829
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1279 "error: ObjectAlignmentInBytes=%d must be power of 2\n", |
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1280 (int)ObjectAlignmentInBytes); |
1571
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1281 return false; |
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1282 } |
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1283 if ((int)ObjectAlignmentInBytes < BytesPerLong) { |
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1284 jio_fprintf(defaultStream::error_stream(), |
1829
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1285 "error: ObjectAlignmentInBytes=%d must be greater or equal %d\n", |
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1286 (int)ObjectAlignmentInBytes, BytesPerLong); |
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1287 return false; |
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1288 } |
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1289 // It does not make sense to have big object alignment |
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1290 // since a space lost due to alignment will be greater |
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1291 // then a saved space from compressed oops. |
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1292 if ((int)ObjectAlignmentInBytes > 256) { |
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1293 jio_fprintf(defaultStream::error_stream(), |
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1294 "error: ObjectAlignmentInBytes=%d must not be greater then 256\n", |
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1295 (int)ObjectAlignmentInBytes); |
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1296 return false; |
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1297 } |
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1298 // In case page size is very small. |
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1299 if ((int)ObjectAlignmentInBytes >= os::vm_page_size()) { |
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1300 jio_fprintf(defaultStream::error_stream(), |
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1301 "error: ObjectAlignmentInBytes=%d must be less then page size %d\n", |
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1302 (int)ObjectAlignmentInBytes, os::vm_page_size()); |
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1303 return false; |
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1304 } |
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1305 return true; |
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1306 } |
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1307 |
135
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1308 inline uintx max_heap_for_compressed_oops() { |
1963 | 1309 // Avoid sign flip. |
1310 if (OopEncodingHeapMax < MaxPermSize + os::vm_page_size()) { | |
1311 return 0; | |
1312 } | |
1313 LP64_ONLY(return OopEncodingHeapMax - MaxPermSize - os::vm_page_size()); | |
1064 | 1314 NOT_LP64(ShouldNotReachHere(); return 0); |
135
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1315 } |
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1316 |
0 | 1317 bool Arguments::should_auto_select_low_pause_collector() { |
1318 if (UseAutoGCSelectPolicy && | |
1319 !FLAG_IS_DEFAULT(MaxGCPauseMillis) && | |
1320 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) { | |
1321 if (PrintGCDetails) { | |
1322 // Cannot use gclog_or_tty yet. | |
1323 tty->print_cr("Automatic selection of the low pause collector" | |
1324 " based on pause goal of %d (ms)", MaxGCPauseMillis); | |
1325 } | |
1326 return true; | |
1327 } | |
1328 return false; | |
1329 } | |
1330 | |
1331 void Arguments::set_ergonomics_flags() { | |
1332 // Parallel GC is not compatible with sharing. If one specifies | |
1064 | 1333 // that they want sharing explicitly, do not set ergonomics flags. |
2362
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1334 if (DumpSharedSpaces || RequireSharedSpaces) { |
0 | 1335 return; |
1336 } | |
1337 | |
1338 if (os::is_server_class_machine() && !force_client_mode ) { | |
1339 // If no other collector is requested explicitly, | |
1340 // let the VM select the collector based on | |
1341 // machine class and automatic selection policy. | |
1342 if (!UseSerialGC && | |
1343 !UseConcMarkSweepGC && | |
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1344 !UseG1GC && |
0 | 1345 !UseParNewGC && |
1346 !DumpSharedSpaces && | |
1347 FLAG_IS_DEFAULT(UseParallelGC)) { | |
1348 if (should_auto_select_low_pause_collector()) { | |
1349 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true); | |
1350 } else { | |
1351 FLAG_SET_ERGO(bool, UseParallelGC, true); | |
1352 } | |
1353 no_shared_spaces(); | |
1354 } | |
1355 } | |
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1356 |
1010 | 1357 #ifndef ZERO |
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1358 #ifdef _LP64 |
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1359 // Check that UseCompressedOops can be set with the max heap size allocated |
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1360 // by ergonomics. |
187 | 1361 if (MaxHeapSize <= max_heap_for_compressed_oops()) { |
1783 | 1362 #if !defined(COMPILER1) || defined(TIERED) |
2228 | 1363 if (FLAG_IS_DEFAULT(UseCompressedOops)) { |
932 | 1364 FLAG_SET_ERGO(bool, UseCompressedOops, true); |
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1365 } |
1060 | 1366 #endif |
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1367 #ifdef _WIN64 |
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1368 if (UseLargePages && UseCompressedOops) { |
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1369 // Cannot allocate guard pages for implicit checks in indexed addressing |
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1370 // mode, when large pages are specified on windows. |
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1371 // This flag could be switched ON if narrow oop base address is set to 0, |
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1372 // see code in Universe::initialize_heap(). |
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1373 Universe::set_narrow_oop_use_implicit_null_checks(false); |
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1374 } |
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1375 #endif // _WIN64 |
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1376 } else { |
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1377 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) { |
344 | 1378 warning("Max heap size too large for Compressed Oops"); |
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1379 FLAG_SET_DEFAULT(UseCompressedOops, false); |
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1380 } |
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1381 } |
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1382 // Also checks that certain machines are slower with compressed oops |
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1383 // in vm_version initialization code. |
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1384 #endif // _LP64 |
1010 | 1385 #endif // !ZERO |
0 | 1386 } |
1387 | |
1388 void Arguments::set_parallel_gc_flags() { | |
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1389 assert(UseParallelGC || UseParallelOldGC, "Error"); |
0 | 1390 // If parallel old was requested, automatically enable parallel scavenge. |
1391 if (UseParallelOldGC && !UseParallelGC && FLAG_IS_DEFAULT(UseParallelGC)) { | |
1392 FLAG_SET_DEFAULT(UseParallelGC, true); | |
1393 } | |
1394 | |
1395 // If no heap maximum was requested explicitly, use some reasonable fraction | |
1396 // of the physical memory, up to a maximum of 1GB. | |
1397 if (UseParallelGC) { | |
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1398 FLAG_SET_ERGO(uintx, ParallelGCThreads, |
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1399 Abstract_VM_Version::parallel_worker_threads()); |
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1400 |
0 | 1401 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the |
1402 // SurvivorRatio has been set, reset their default values to SurvivorRatio + | |
1403 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger. | |
1404 // See CR 6362902 for details. | |
1405 if (!FLAG_IS_DEFAULT(SurvivorRatio)) { | |
1406 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) { | |
1407 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2); | |
1408 } | |
1409 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) { | |
1410 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2); | |
1411 } | |
1412 } | |
1413 | |
1414 if (UseParallelOldGC) { | |
1415 // Par compact uses lower default values since they are treated as | |
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1416 // minimums. These are different defaults because of the different |
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1417 // interpretation and are not ergonomically set. |
0 | 1418 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) { |
13
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1419 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1); |
0 | 1420 } |
1421 if (FLAG_IS_DEFAULT(PermMarkSweepDeadRatio)) { | |
13
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1422 FLAG_SET_DEFAULT(PermMarkSweepDeadRatio, 5); |
0 | 1423 } |
1424 } | |
1425 } | |
3322
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1426 if (UseNUMA) { |
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1427 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) { |
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1428 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M); |
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1429 } |
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1430 } |
0 | 1431 } |
1432 | |
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1433 void Arguments::set_g1_gc_flags() { |
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1434 assert(UseG1GC, "Error"); |
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1435 #ifdef COMPILER1 |
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1436 FastTLABRefill = false; |
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1437 #endif |
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1438 FLAG_SET_DEFAULT(ParallelGCThreads, |
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1439 Abstract_VM_Version::parallel_worker_threads()); |
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1440 if (ParallelGCThreads == 0) { |
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1441 FLAG_SET_DEFAULT(ParallelGCThreads, |
751 | 1442 Abstract_VM_Version::parallel_worker_threads()); |
342
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1443 } |
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1444 no_shared_spaces(); |
751 | 1445 |
1284 | 1446 if (FLAG_IS_DEFAULT(MarkStackSize)) { |
1311
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1447 FLAG_SET_DEFAULT(MarkStackSize, 128 * TASKQUEUE_SIZE); |
1284 | 1448 } |
1449 if (PrintGCDetails && Verbose) { | |
1450 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk", | |
1451 MarkStackSize / K, MarkStackSizeMax / K); | |
1452 tty->print_cr("ConcGCThreads: %u", ConcGCThreads); | |
1453 } | |
1356 | 1454 |
1455 if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) { | |
1456 // In G1, we want the default GC overhead goal to be higher than | |
1457 // say in PS. So we set it here to 10%. Otherwise the heap might | |
1458 // be expanded more aggressively than we would like it to. In | |
1459 // fact, even 10% seems to not be high enough in some cases | |
1460 // (especially small GC stress tests that the main thing they do | |
1461 // is allocation). We might consider increase it further. | |
1462 FLAG_SET_DEFAULT(GCTimeRatio, 9); | |
1463 } | |
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1464 } |
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1465 |
1064 | 1466 void Arguments::set_heap_size() { |
1467 if (!FLAG_IS_DEFAULT(DefaultMaxRAMFraction)) { | |
1468 // Deprecated flag | |
1469 FLAG_SET_CMDLINE(uintx, MaxRAMFraction, DefaultMaxRAMFraction); | |
1470 } | |
1471 | |
1472 const julong phys_mem = | |
1473 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM) | |
1474 : (julong)MaxRAM; | |
1475 | |
1476 // If the maximum heap size has not been set with -Xmx, | |
1477 // then set it as fraction of the size of physical memory, | |
1478 // respecting the maximum and minimum sizes of the heap. | |
342
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1479 if (FLAG_IS_DEFAULT(MaxHeapSize)) { |
1064 | 1480 julong reasonable_max = phys_mem / MaxRAMFraction; |
1481 | |
1482 if (phys_mem <= MaxHeapSize * MinRAMFraction) { | |
1483 // Small physical memory, so use a minimum fraction of it for the heap | |
1484 reasonable_max = phys_mem / MinRAMFraction; | |
1485 } else { | |
1486 // Not-small physical memory, so require a heap at least | |
1487 // as large as MaxHeapSize | |
1488 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize); | |
1489 } | |
1490 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) { | |
1491 // Limit the heap size to ErgoHeapSizeLimit | |
1492 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit); | |
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1493 } |
1064 | 1494 if (UseCompressedOops) { |
1495 // Limit the heap size to the maximum possible when using compressed oops | |
1963 | 1496 julong max_coop_heap = (julong)max_heap_for_compressed_oops(); |
1497 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) { | |
1498 // Heap should be above HeapBaseMinAddress to get zero based compressed oops | |
1499 // but it should be not less than default MaxHeapSize. | |
1500 max_coop_heap -= HeapBaseMinAddress; | |
1501 } | |
1502 reasonable_max = MIN2(reasonable_max, max_coop_heap); | |
1064 | 1503 } |
1504 reasonable_max = os::allocatable_physical_memory(reasonable_max); | |
1505 | |
1506 if (!FLAG_IS_DEFAULT(InitialHeapSize)) { | |
1507 // An initial heap size was specified on the command line, | |
1508 // so be sure that the maximum size is consistent. Done | |
1509 // after call to allocatable_physical_memory because that | |
1510 // method might reduce the allocation size. | |
1511 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize); | |
1512 } | |
1513 | |
342
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1514 if (PrintGCDetails && Verbose) { |
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1515 // Cannot use gclog_or_tty yet. |
1064 | 1516 tty->print_cr(" Maximum heap size " SIZE_FORMAT, reasonable_max); |
342
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1517 } |
1064 | 1518 FLAG_SET_ERGO(uintx, MaxHeapSize, (uintx)reasonable_max); |
1519 } | |
1520 | |
1521 // If the initial_heap_size has not been set with InitialHeapSize | |
1522 // or -Xms, then set it as fraction of the size of physical memory, | |
1523 // respecting the maximum and minimum sizes of the heap. | |
1524 if (FLAG_IS_DEFAULT(InitialHeapSize)) { | |
1074
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1525 julong reasonable_minimum = (julong)(OldSize + NewSize); |
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1526 |
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1527 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize); |
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1528 |
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1529 reasonable_minimum = os::allocatable_physical_memory(reasonable_minimum); |
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1530 |
1064 | 1531 julong reasonable_initial = phys_mem / InitialRAMFraction; |
1532 | |
1074
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1533 reasonable_initial = MAX2(reasonable_initial, reasonable_minimum); |
1064 | 1534 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize); |
1535 | |
1536 reasonable_initial = os::allocatable_physical_memory(reasonable_initial); | |
1537 | |
1538 if (PrintGCDetails && Verbose) { | |
1539 // Cannot use gclog_or_tty yet. | |
1540 tty->print_cr(" Initial heap size " SIZE_FORMAT, (uintx)reasonable_initial); | |
1074
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1541 tty->print_cr(" Minimum heap size " SIZE_FORMAT, (uintx)reasonable_minimum); |
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1542 } |
1064 | 1543 FLAG_SET_ERGO(uintx, InitialHeapSize, (uintx)reasonable_initial); |
1074
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1544 set_min_heap_size((uintx)reasonable_minimum); |
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1545 } |
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1546 } |
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1547 |
0 | 1548 // This must be called after ergonomics because we want bytecode rewriting |
1549 // if the server compiler is used, or if UseSharedSpaces is disabled. | |
1550 void Arguments::set_bytecode_flags() { | |
1551 // Better not attempt to store into a read-only space. | |
1552 if (UseSharedSpaces) { | |
1553 FLAG_SET_DEFAULT(RewriteBytecodes, false); | |
1554 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); | |
1555 } | |
1556 | |
1557 if (!RewriteBytecodes) { | |
1558 FLAG_SET_DEFAULT(RewriteFrequentPairs, false); | |
1559 } | |
1560 } | |
1561 | |
1562 // Aggressive optimization flags -XX:+AggressiveOpts | |
1563 void Arguments::set_aggressive_opts_flags() { | |
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1564 #ifdef COMPILER2 |
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1565 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) { |
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1566 if (FLAG_IS_DEFAULT(EliminateAutoBox)) { |
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1567 FLAG_SET_DEFAULT(EliminateAutoBox, true); |
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1568 } |
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1569 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) { |
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1570 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000); |
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1571 } |
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1572 |
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1573 // Feed the cache size setting into the JDK |
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1574 char buffer[1024]; |
513
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1575 sprintf(buffer, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax); |
17
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|
1576 add_property(buffer); |
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6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
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0
diff
changeset
|
1577 } |
65 | 1578 if (AggressiveOpts && FLAG_IS_DEFAULT(DoEscapeAnalysis)) { |
1579 FLAG_SET_DEFAULT(DoEscapeAnalysis, true); | |
1580 } | |
416
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6649622: HotSpot Biased locking needs tuning on latest CPUs
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parents:
363
diff
changeset
|
1581 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
changeset
|
1582 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500); |
b6cfd754403d
6649622: HotSpot Biased locking needs tuning on latest CPUs
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diff
changeset
|
1583 } |
1622 | 1584 if (AggressiveOpts && FLAG_IS_DEFAULT(OptimizeStringConcat)) { |
1585 FLAG_SET_DEFAULT(OptimizeStringConcat, true); | |
1586 } | |
1763 | 1587 if (AggressiveOpts && FLAG_IS_DEFAULT(OptimizeFill)) { |
1588 FLAG_SET_DEFAULT(OptimizeFill, true); | |
1589 } | |
17
ff5961f4c095
6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
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0
diff
changeset
|
1590 #endif |
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6395208: Elide autoboxing for calls to HashMap.get(int) and HashMap.get(long)
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0
diff
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|
1591 |
0 | 1592 if (AggressiveOpts) { |
61 | 1593 // Sample flag setting code |
1594 // if (FLAG_IS_DEFAULT(EliminateZeroing)) { | |
1595 // FLAG_SET_DEFAULT(EliminateZeroing, true); | |
1596 // } | |
0 | 1597 } |
1598 } | |
1599 | |
1600 //=========================================================================================================== | |
1601 // Parsing of java.compiler property | |
1602 | |
1603 void Arguments::process_java_compiler_argument(char* arg) { | |
1604 // For backwards compatibility, Djava.compiler=NONE or "" | |
1605 // causes us to switch to -Xint mode UNLESS -Xdebug | |
1606 // is also specified. | |
1607 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) { | |
1608 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen. | |
1609 } | |
1610 } | |
1611 | |
1612 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) { | |
1613 _sun_java_launcher = strdup(launcher); | |
2302
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7022037: Pause when exiting if debugger is attached on windows
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2243
diff
changeset
|
1614 if (strcmp("gamma", _sun_java_launcher) == 0) { |
da091bb67459
7022037: Pause when exiting if debugger is attached on windows
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diff
changeset
|
1615 _created_by_gamma_launcher = true; |
da091bb67459
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diff
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|
1616 } |
0 | 1617 } |
1618 | |
1619 bool Arguments::created_by_java_launcher() { | |
1620 assert(_sun_java_launcher != NULL, "property must have value"); | |
1621 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0; | |
1622 } | |
1623 | |
2302
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7022037: Pause when exiting if debugger is attached on windows
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diff
changeset
|
1624 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
|
1625 return _created_by_gamma_launcher; |
da091bb67459
7022037: Pause when exiting if debugger is attached on windows
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parents:
2243
diff
changeset
|
1626 } |
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diff
changeset
|
1627 |
0 | 1628 //=========================================================================================================== |
1629 // Parsing of main arguments | |
1630 | |
1244
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6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
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1188
diff
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|
1631 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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1188
diff
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|
1632 uintx max, const char* name) { |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
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1188
diff
changeset
|
1633 // 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
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1188
diff
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|
1634 // false, otherwise. |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1635 if (val >= min && val <= max) { |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1636 return true; |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1637 } |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1638 jio_fprintf(defaultStream::error_stream(), |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1639 "%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
|
1640 " and " UINTX_FORMAT "\n", |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1641 name, val, min, max); |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1642 return false; |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
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1188
diff
changeset
|
1643 } |
745c853ee57f
6885297: java -XX:RefDiscoveryPolicy=2 or -XX:TLABWasteTargetPercent=0 cause VM crash
johnc
parents:
1188
diff
changeset
|
1644 |
1744
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1645 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
|
1646 // 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
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|
1647 // false, otherwise. |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1648 if (val >= min ) { |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1649 return true; |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
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1681
diff
changeset
|
1650 } |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1651 jio_fprintf(defaultStream::error_stream(), |
2366
1fb790245268
6820066: Check that -XX:ParGCArrayScanChunk has a value larger than zero.
jwilhelm
parents:
2362
diff
changeset
|
1652 "%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
|
1653 name, val, min); |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1654 return false; |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1655 } |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1656 |
0 | 1657 bool Arguments::verify_percentage(uintx value, const char* name) { |
1658 if (value <= 100) { | |
1659 return true; | |
1660 } | |
1661 jio_fprintf(defaultStream::error_stream(), | |
1662 "%s of " UINTX_FORMAT " is invalid; must be between 0 and 100\n", | |
1663 name, value); | |
1664 return false; | |
1665 } | |
1666 | |
1064 | 1667 static void force_serial_gc() { |
0 | 1668 FLAG_SET_DEFAULT(UseSerialGC, true); |
1669 FLAG_SET_DEFAULT(UseParNewGC, false); | |
1670 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
|
1671 FLAG_SET_DEFAULT(CMSIncrementalMode, false); // special CMS suboption |
0 | 1672 FLAG_SET_DEFAULT(UseParallelGC, false); |
1673 FLAG_SET_DEFAULT(UseParallelOldGC, false); | |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
135
diff
changeset
|
1674 FLAG_SET_DEFAULT(UseG1GC, false); |
0 | 1675 } |
1676 | |
1677 static bool verify_serial_gc_flags() { | |
1678 return (UseSerialGC && | |
945
68ef3fdcdb76
6872136: CMS: confusing message may be printed when a collector is switched off implicitly
ysr
parents:
932
diff
changeset
|
1679 !(UseParNewGC || (UseConcMarkSweepGC || CMSIncrementalMode) || UseG1GC || |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
135
diff
changeset
|
1680 UseParallelGC || UseParallelOldGC)); |
0 | 1681 } |
1682 | |
10
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1683 // Check consistency of GC selection |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1684 bool Arguments::check_gc_consistency() { |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1685 bool status = true; |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1686 // 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
|
1687 // 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
|
1688 // 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
|
1689 // 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
|
1690 // 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
|
1691 // 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
|
1692 // select conflicting combinations. |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1693 uint i = 0; |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1694 if (UseSerialGC) i++; |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1695 if (UseConcMarkSweepGC || UseParNewGC) i++; |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1696 if (UseParallelGC || UseParallelOldGC) i++; |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
751
diff
changeset
|
1697 if (UseG1GC) i++; |
10
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1698 if (i > 1) { |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1699 jio_fprintf(defaultStream::error_stream(), |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1700 "Conflicting collector combinations in option list; " |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1701 "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
|
1702 "allowed\n"); |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1703 status = false; |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1704 } |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1705 |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1706 return status; |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1707 } |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1708 |
1744
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1709 // Check stack pages settings |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1710 bool Arguments::check_stack_pages() |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1711 { |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1712 bool status = true; |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1713 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
|
1714 status = status && verify_min_value(StackRedPages, 1, "StackRedPages"); |
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1864
diff
changeset
|
1715 // 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
|
1716 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
|
1717 return status; |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1718 } |
f8c5d1bdaad4
6885308: The incorrect -XX:StackRedPages, -XX:StackShadowPages, -XX:StackYellowPages could cause VM crash
ptisnovs
parents:
1681
diff
changeset
|
1719 |
0 | 1720 // Check the consistency of vm_init_args |
1721 bool Arguments::check_vm_args_consistency() { | |
1722 // Method for adding checks for flag consistency. | |
1723 // The intent is to warn the user of all possible conflicts, | |
1724 // before returning an error. | |
1725 // Note: Needs platform-dependent factoring. | |
1726 bool status = true; | |
1727 | |
1728 #if ( (defined(COMPILER2) && defined(SPARC))) | |
1729 // NOTE: The call to VM_Version_init depends on the fact that VM_Version_init | |
1730 // on sparc doesn't require generation of a stub as is the case on, e.g., | |
1731 // x86. Normally, VM_Version_init must be called from init_globals in | |
1732 // init.cpp, which is called by the initial java thread *after* arguments | |
1733 // have been parsed. VM_Version_init gets called twice on sparc. | |
1734 extern void VM_Version_init(); | |
1735 VM_Version_init(); | |
1736 if (!VM_Version::has_v9()) { | |
1737 jio_fprintf(defaultStream::error_stream(), | |
1738 "V8 Machine detected, Server requires V9\n"); | |
1739 status = false; | |
1740 } | |
1741 #endif /* COMPILER2 && SPARC */ | |
1742 | |
1743 // Allow both -XX:-UseStackBanging and -XX:-UseBoundThreads in non-product | |
1744 // builds so the cost of stack banging can be measured. | |
1745 #if (defined(PRODUCT) && defined(SOLARIS)) | |
1746 if (!UseBoundThreads && !UseStackBanging) { | |
1747 jio_fprintf(defaultStream::error_stream(), | |
1748 "-UseStackBanging conflicts with -UseBoundThreads\n"); | |
1749 | |
1750 status = false; | |
1751 } | |
1752 #endif | |
1753 | |
1754 if (TLABRefillWasteFraction == 0) { | |
1755 jio_fprintf(defaultStream::error_stream(), | |
1756 "TLABRefillWasteFraction should be a denominator, " | |
1757 "not " SIZE_FORMAT "\n", | |
1758 TLABRefillWasteFraction); | |
1759 status = false; | |
1760 } | |
1761 | |
10
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1762 status = status && verify_percentage(AdaptiveSizePolicyWeight, |
0 | 1763 "AdaptiveSizePolicyWeight"); |
10
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1764 status = status && verify_percentage(AdaptivePermSizeWeight, "AdaptivePermSizeWeight"); |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1765 status = status && verify_percentage(ThresholdTolerance, "ThresholdTolerance"); |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1766 status = status && verify_percentage(MinHeapFreeRatio, "MinHeapFreeRatio"); |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
1767 status = status && verify_percentage(MaxHeapFreeRatio, "MaxHeapFreeRatio"); |
0 | 1768 |
1769 if (MinHeapFreeRatio > MaxHeapFreeRatio) { | |
1770 jio_fprintf(defaultStream::error_stream(), | |
1771 "MinHeapFreeRatio (" UINTX_FORMAT ") must be less than or " | |
1772 "equal to MaxHeapFreeRatio (" UINTX_FORMAT ")\n", | |
1773 MinHeapFreeRatio, MaxHeapFreeRatio); | |
1774 status = false; | |
1775 } | |
1776 // Keeping the heap 100% free is hard ;-) so limit it to 99%. | |
1777 MinHeapFreeRatio = MIN2(MinHeapFreeRatio, (uintx) 99); | |
1778 | |
1779 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) { | |
1780 MarkSweepAlwaysCompactCount = 1; // Move objects every gc. | |
1781 } | |
1782 | |
483
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
449
diff
changeset
|
1783 if (UseParallelOldGC && ParallelOldGCSplitALot) { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
449
diff
changeset
|
1784 // Settings to encourage splitting. |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
449
diff
changeset
|
1785 if (!FLAG_IS_CMDLINE(NewRatio)) { |
0f773163217d
6765954: par compact - stress mode for splitting young gen spaces
jcoomes
parents:
449
diff
changeset
|
1786 FLAG_SET_CMDLINE(intx, NewRatio, 2); |
0f773163217d
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1787 } |
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1788 if (!FLAG_IS_CMDLINE(ScavengeBeforeFullGC)) { |
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1789 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); |
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1790 } |
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1791 } |
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1792 |
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1793 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); |
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1794 status = status && verify_percentage(GCTimeLimit, "GCTimeLimit"); |
0 | 1795 if (GCTimeLimit == 100) { |
1796 // Turn off gc-overhead-limit-exceeded checks | |
1797 FLAG_SET_DEFAULT(UseGCOverheadLimit, false); | |
1798 } | |
1799 | |
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1800 status = status && verify_percentage(GCHeapFreeLimit, "GCHeapFreeLimit"); |
0 | 1801 |
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1802 status = status && check_gc_consistency(); |
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1803 status = status && check_stack_pages(); |
0 | 1804 |
1805 if (_has_alloc_profile) { | |
1806 if (UseParallelGC || UseParallelOldGC) { | |
1807 jio_fprintf(defaultStream::error_stream(), | |
1808 "error: invalid argument combination.\n" | |
1809 "Allocation profiling (-Xaprof) cannot be used together with " | |
1810 "Parallel GC (-XX:+UseParallelGC or -XX:+UseParallelOldGC).\n"); | |
1811 status = false; | |
1812 } | |
1813 if (UseConcMarkSweepGC) { | |
1814 jio_fprintf(defaultStream::error_stream(), | |
1815 "error: invalid argument combination.\n" | |
1816 "Allocation profiling (-Xaprof) cannot be used together with " | |
1817 "the CMS collector (-XX:+UseConcMarkSweepGC).\n"); | |
1818 status = false; | |
1819 } | |
1820 } | |
1821 | |
1822 if (CMSIncrementalMode) { | |
1823 if (!UseConcMarkSweepGC) { | |
1824 jio_fprintf(defaultStream::error_stream(), | |
1825 "error: invalid argument combination.\n" | |
1826 "The CMS collector (-XX:+UseConcMarkSweepGC) must be " | |
1827 "selected in order\nto use CMSIncrementalMode.\n"); | |
1828 status = false; | |
1829 } else { | |
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1830 status = status && verify_percentage(CMSIncrementalDutyCycle, |
0 | 1831 "CMSIncrementalDutyCycle"); |
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1832 status = status && verify_percentage(CMSIncrementalDutyCycleMin, |
0 | 1833 "CMSIncrementalDutyCycleMin"); |
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1834 status = status && verify_percentage(CMSIncrementalSafetyFactor, |
0 | 1835 "CMSIncrementalSafetyFactor"); |
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1836 status = status && verify_percentage(CMSIncrementalOffset, |
0 | 1837 "CMSIncrementalOffset"); |
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1838 status = status && verify_percentage(CMSExpAvgFactor, |
0 | 1839 "CMSExpAvgFactor"); |
1840 // If it was not set on the command line, set | |
1841 // CMSInitiatingOccupancyFraction to 1 so icms can initiate cycles early. | |
1842 if (CMSInitiatingOccupancyFraction < 0) { | |
1843 FLAG_SET_DEFAULT(CMSInitiatingOccupancyFraction, 1); | |
1844 } | |
1845 } | |
1846 } | |
1847 | |
1848 // CMS space iteration, which FLSVerifyAllHeapreferences entails, | |
1849 // insists that we hold the requisite locks so that the iteration is | |
1850 // MT-safe. For the verification at start-up and shut-down, we don't | |
1851 // yet have a good way of acquiring and releasing these locks, | |
1852 // which are not visible at the CollectedHeap level. We want to | |
1853 // be able to acquire these locks and then do the iteration rather | |
1854 // than just disable the lock verification. This will be fixed under | |
1855 // bug 4788986. | |
1856 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) { | |
1857 if (VerifyGCStartAt == 0) { | |
1858 warning("Heap verification at start-up disabled " | |
1859 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); | |
1860 VerifyGCStartAt = 1; // Disable verification at start-up | |
1861 } | |
1862 if (VerifyBeforeExit) { | |
1863 warning("Heap verification at shutdown disabled " | |
1864 "(due to current incompatibility with FLSVerifyAllHeapReferences)"); | |
1865 VerifyBeforeExit = false; // Disable verification at shutdown | |
1866 } | |
1867 } | |
1868 | |
1869 // Note: only executed in non-PRODUCT mode | |
1870 if (!UseAsyncConcMarkSweepGC && | |
1871 (ExplicitGCInvokesConcurrent || | |
1872 ExplicitGCInvokesConcurrentAndUnloadsClasses)) { | |
1873 jio_fprintf(defaultStream::error_stream(), | |
1874 "error: +ExplictGCInvokesConcurrent[AndUnloadsClasses] conflicts" | |
1875 " with -UseAsyncConcMarkSweepGC"); | |
1876 status = false; | |
1877 } | |
1878 | |
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1879 status = status && verify_min_value(ParGCArrayScanChunk, 1, "ParGCArrayScanChunk"); |
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1880 |
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1881 #ifndef SERIALGC |
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1882 if (UseG1GC) { |
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1883 status = status && verify_percentage(InitiatingHeapOccupancyPercent, |
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1884 "InitiatingHeapOccupancyPercent"); |
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1885 status = status && verify_min_value(G1RefProcDrainInterval, 1, |
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1886 "G1RefProcDrainInterval"); |
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1887 status = status && verify_min_value((intx)G1ConcMarkStepDurationMillis, 1, |
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1888 "G1ConcMarkStepDurationMillis"); |
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1889 } |
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1890 #endif |
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1891 |
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1892 status = status && verify_interval(RefDiscoveryPolicy, |
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1893 ReferenceProcessor::DiscoveryPolicyMin, |
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1894 ReferenceProcessor::DiscoveryPolicyMax, |
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1895 "RefDiscoveryPolicy"); |
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1896 |
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1897 // Limit the lower bound of this flag to 1 as it is used in a division |
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1898 // expression. |
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1899 status = status && verify_interval(TLABWasteTargetPercent, |
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1900 1, 100, "TLABWasteTargetPercent"); |
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1901 |
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1902 status = status && verify_object_alignment(); |
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1903 |
0 | 1904 return status; |
1905 } | |
1906 | |
1907 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore, | |
1908 const char* option_type) { | |
1909 if (ignore) return false; | |
1910 | |
1911 const char* spacer = " "; | |
1912 if (option_type == NULL) { | |
1913 option_type = ++spacer; // Set both to the empty string. | |
1914 } | |
1915 | |
1916 if (os::obsolete_option(option)) { | |
1917 jio_fprintf(defaultStream::error_stream(), | |
1918 "Obsolete %s%soption: %s\n", option_type, spacer, | |
1919 option->optionString); | |
1920 return false; | |
1921 } else { | |
1922 jio_fprintf(defaultStream::error_stream(), | |
1923 "Unrecognized %s%soption: %s\n", option_type, spacer, | |
1924 option->optionString); | |
1925 return true; | |
1926 } | |
1927 } | |
1928 | |
1929 static const char* user_assertion_options[] = { | |
1930 "-da", "-ea", "-disableassertions", "-enableassertions", 0 | |
1931 }; | |
1932 | |
1933 static const char* system_assertion_options[] = { | |
1934 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0 | |
1935 }; | |
1936 | |
1937 // Return true if any of the strings in null-terminated array 'names' matches. | |
1938 // If tail_allowed is true, then the tail must begin with a colon; otherwise, | |
1939 // the option must match exactly. | |
1940 static bool match_option(const JavaVMOption* option, const char** names, const char** tail, | |
1941 bool tail_allowed) { | |
1942 for (/* empty */; *names != NULL; ++names) { | |
1943 if (match_option(option, *names, tail)) { | |
1944 if (**tail == '\0' || tail_allowed && **tail == ':') { | |
1945 return true; | |
1946 } | |
1947 } | |
1948 } | |
1949 return false; | |
1950 } | |
1951 | |
1284 | 1952 bool Arguments::parse_uintx(const char* value, |
1953 uintx* uintx_arg, | |
1954 uintx min_size) { | |
1955 | |
1956 // Check the sign first since atomull() parses only unsigned values. | |
1957 bool value_is_positive = !(*value == '-'); | |
1958 | |
1959 if (value_is_positive) { | |
1960 julong n; | |
1961 bool good_return = atomull(value, &n); | |
1962 if (good_return) { | |
1963 bool above_minimum = n >= min_size; | |
1964 bool value_is_too_large = n > max_uintx; | |
1965 | |
1966 if (above_minimum && !value_is_too_large) { | |
1967 *uintx_arg = n; | |
1968 return true; | |
1969 } | |
1970 } | |
1971 } | |
1972 return false; | |
1973 } | |
1974 | |
0 | 1975 Arguments::ArgsRange Arguments::parse_memory_size(const char* s, |
489
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1976 julong* long_arg, |
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1977 julong min_size) { |
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1978 if (!atomull(s, long_arg)) return arg_unreadable; |
0 | 1979 return check_memory_size(*long_arg, min_size); |
1980 } | |
1981 | |
1982 // Parse JavaVMInitArgs structure | |
1983 | |
1984 jint Arguments::parse_vm_init_args(const JavaVMInitArgs* args) { | |
1985 // For components of the system classpath. | |
1986 SysClassPath scp(Arguments::get_sysclasspath()); | |
1987 bool scp_assembly_required = false; | |
1988 | |
1989 // Save default settings for some mode flags | |
1990 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods; | |
1991 Arguments::_UseOnStackReplacement = UseOnStackReplacement; | |
1992 Arguments::_ClipInlining = ClipInlining; | |
1993 Arguments::_BackgroundCompilation = BackgroundCompilation; | |
1994 | |
1995 // Parse JAVA_TOOL_OPTIONS environment variable (if present) | |
1996 jint result = parse_java_tool_options_environment_variable(&scp, &scp_assembly_required); | |
1997 if (result != JNI_OK) { | |
1998 return result; | |
1999 } | |
2000 | |
2001 // Parse JavaVMInitArgs structure passed in | |
2002 result = parse_each_vm_init_arg(args, &scp, &scp_assembly_required, COMMAND_LINE); | |
2003 if (result != JNI_OK) { | |
2004 return result; | |
2005 } | |
2006 | |
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2007 if (AggressiveOpts) { |
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2008 // Insert alt-rt.jar between user-specified bootclasspath |
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2009 // prefix and the default bootclasspath. os::set_boot_path() |
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2010 // uses meta_index_dir as the default bootclasspath directory. |
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2011 const char* altclasses_jar = "alt-rt.jar"; |
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2012 size_t altclasses_path_len = strlen(get_meta_index_dir()) + 1 + |
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2013 strlen(altclasses_jar); |
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|
2014 char* altclasses_path = NEW_C_HEAP_ARRAY(char, altclasses_path_len); |
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2015 strcpy(altclasses_path, get_meta_index_dir()); |
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2016 strcat(altclasses_path, altclasses_jar); |
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2017 scp.add_suffix_to_prefix(altclasses_path); |
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2018 scp_assembly_required = true; |
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2019 FREE_C_HEAP_ARRAY(char, altclasses_path); |
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2020 } |
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2021 |
0 | 2022 // Parse _JAVA_OPTIONS environment variable (if present) (mimics classic VM) |
2023 result = parse_java_options_environment_variable(&scp, &scp_assembly_required); | |
2024 if (result != JNI_OK) { | |
2025 return result; | |
2026 } | |
2027 | |
2028 // Do final processing now that all arguments have been parsed | |
2029 result = finalize_vm_init_args(&scp, scp_assembly_required); | |
2030 if (result != JNI_OK) { | |
2031 return result; | |
2032 } | |
2033 | |
2034 return JNI_OK; | |
2035 } | |
2036 | |
2037 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, | |
2038 SysClassPath* scp_p, | |
2039 bool* scp_assembly_required_p, | |
2040 FlagValueOrigin origin) { | |
2041 // Remaining part of option string | |
2042 const char* tail; | |
2043 | |
2044 // iterate over arguments | |
2045 for (int index = 0; index < args->nOptions; index++) { | |
2046 bool is_absolute_path = false; // for -agentpath vs -agentlib | |
2047 | |
2048 const JavaVMOption* option = args->options + index; | |
2049 | |
2050 if (!match_option(option, "-Djava.class.path", &tail) && | |
2051 !match_option(option, "-Dsun.java.command", &tail) && | |
2052 !match_option(option, "-Dsun.java.launcher", &tail)) { | |
2053 | |
2054 // add all jvm options to the jvm_args string. This string | |
2055 // is used later to set the java.vm.args PerfData string constant. | |
2056 // the -Djava.class.path and the -Dsun.java.command options are | |
2057 // omitted from jvm_args string as each have their own PerfData | |
2058 // string constant object. | |
2059 build_jvm_args(option->optionString); | |
2060 } | |
2061 | |
2062 // -verbose:[class/gc/jni] | |
2063 if (match_option(option, "-verbose", &tail)) { | |
2064 if (!strcmp(tail, ":class") || !strcmp(tail, "")) { | |
2065 FLAG_SET_CMDLINE(bool, TraceClassLoading, true); | |
2066 FLAG_SET_CMDLINE(bool, TraceClassUnloading, true); | |
2067 } else if (!strcmp(tail, ":gc")) { | |
2068 FLAG_SET_CMDLINE(bool, PrintGC, true); | |
2069 } else if (!strcmp(tail, ":jni")) { | |
2070 FLAG_SET_CMDLINE(bool, PrintJNIResolving, true); | |
2071 } | |
2072 // -da / -ea / -disableassertions / -enableassertions | |
2073 // These accept an optional class/package name separated by a colon, e.g., | |
2074 // -da:java.lang.Thread. | |
2075 } else if (match_option(option, user_assertion_options, &tail, true)) { | |
2076 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' | |
2077 if (*tail == '\0') { | |
2078 JavaAssertions::setUserClassDefault(enable); | |
2079 } else { | |
2080 assert(*tail == ':', "bogus match by match_option()"); | |
2081 JavaAssertions::addOption(tail + 1, enable); | |
2082 } | |
2083 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions | |
2084 } else if (match_option(option, system_assertion_options, &tail, false)) { | |
2085 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e' | |
2086 JavaAssertions::setSystemClassDefault(enable); | |
2087 // -bootclasspath: | |
2088 } else if (match_option(option, "-Xbootclasspath:", &tail)) { | |
2089 scp_p->reset_path(tail); | |
2090 *scp_assembly_required_p = true; | |
2091 // -bootclasspath/a: | |
2092 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) { | |
2093 scp_p->add_suffix(tail); | |
2094 *scp_assembly_required_p = true; | |
2095 // -bootclasspath/p: | |
2096 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) { | |
2097 scp_p->add_prefix(tail); | |
2098 *scp_assembly_required_p = true; | |
2099 // -Xrun | |
2100 } else if (match_option(option, "-Xrun", &tail)) { | |
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2101 if (tail != NULL) { |
0 | 2102 const char* pos = strchr(tail, ':'); |
2103 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; | |
2104 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); | |
2105 name[len] = '\0'; | |
2106 | |
2107 char *options = NULL; | |
2108 if(pos != NULL) { | |
2109 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied. | |
2110 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2), pos+1, len2); | |
2111 } | |
2112 #ifdef JVMTI_KERNEL | |
2113 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { | |
2114 warning("profiling and debugging agents are not supported with Kernel VM"); | |
2115 } else | |
2116 #endif // JVMTI_KERNEL | |
2117 add_init_library(name, options); | |
2118 } | |
2119 // -agentlib and -agentpath | |
2120 } else if (match_option(option, "-agentlib:", &tail) || | |
2121 (is_absolute_path = match_option(option, "-agentpath:", &tail))) { | |
2122 if(tail != NULL) { | |
2123 const char* pos = strchr(tail, '='); | |
2124 size_t len = (pos == NULL) ? strlen(tail) : pos - tail; | |
2125 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1), tail, len); | |
2126 name[len] = '\0'; | |
2127 | |
2128 char *options = NULL; | |
2129 if(pos != NULL) { | |
2130 options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(pos + 1) + 1), pos + 1); | |
2131 } | |
2132 #ifdef JVMTI_KERNEL | |
2133 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) { | |
2134 warning("profiling and debugging agents are not supported with Kernel VM"); | |
2135 } else | |
2136 #endif // JVMTI_KERNEL | |
2137 add_init_agent(name, options, is_absolute_path); | |
2138 | |
2139 } | |
2140 // -javaagent | |
2141 } else if (match_option(option, "-javaagent:", &tail)) { | |
2142 if(tail != NULL) { | |
2143 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1), tail); | |
2144 add_init_agent("instrument", options, false); | |
2145 } | |
2146 // -Xnoclassgc | |
2147 } else if (match_option(option, "-Xnoclassgc", &tail)) { | |
2148 FLAG_SET_CMDLINE(bool, ClassUnloading, false); | |
2149 // -Xincgc: i-CMS | |
2150 } else if (match_option(option, "-Xincgc", &tail)) { | |
2151 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); | |
2152 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, true); | |
2153 // -Xnoincgc: no i-CMS | |
2154 } else if (match_option(option, "-Xnoincgc", &tail)) { | |
2155 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); | |
2156 FLAG_SET_CMDLINE(bool, CMSIncrementalMode, false); | |
2157 // -Xconcgc | |
2158 } else if (match_option(option, "-Xconcgc", &tail)) { | |
2159 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true); | |
2160 // -Xnoconcgc | |
2161 } else if (match_option(option, "-Xnoconcgc", &tail)) { | |
2162 FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false); | |
2163 // -Xbatch | |
2164 } else if (match_option(option, "-Xbatch", &tail)) { | |
2165 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); | |
2166 // -Xmn for compatibility with other JVM vendors | |
2167 } else if (match_option(option, "-Xmn", &tail)) { | |
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2168 julong long_initial_eden_size = 0; |
0 | 2169 ArgsRange errcode = parse_memory_size(tail, &long_initial_eden_size, 1); |
2170 if (errcode != arg_in_range) { | |
2171 jio_fprintf(defaultStream::error_stream(), | |
2172 "Invalid initial eden size: %s\n", option->optionString); | |
2173 describe_range_error(errcode); | |
2174 return JNI_EINVAL; | |
2175 } | |
1064 | 2176 FLAG_SET_CMDLINE(uintx, MaxNewSize, (uintx)long_initial_eden_size); |
2177 FLAG_SET_CMDLINE(uintx, NewSize, (uintx)long_initial_eden_size); | |
0 | 2178 // -Xms |
2179 } else if (match_option(option, "-Xms", &tail)) { | |
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2180 julong long_initial_heap_size = 0; |
0 | 2181 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 1); |
2182 if (errcode != arg_in_range) { | |
2183 jio_fprintf(defaultStream::error_stream(), | |
2184 "Invalid initial heap size: %s\n", option->optionString); | |
2185 describe_range_error(errcode); | |
2186 return JNI_EINVAL; | |
2187 } | |
1064 | 2188 FLAG_SET_CMDLINE(uintx, InitialHeapSize, (uintx)long_initial_heap_size); |
0 | 2189 // Currently the minimum size and the initial heap sizes are the same. |
1064 | 2190 set_min_heap_size(InitialHeapSize); |
0 | 2191 // -Xmx |
2192 } else if (match_option(option, "-Xmx", &tail)) { | |
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2193 julong long_max_heap_size = 0; |
0 | 2194 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1); |
2195 if (errcode != arg_in_range) { | |
2196 jio_fprintf(defaultStream::error_stream(), | |
2197 "Invalid maximum heap size: %s\n", option->optionString); | |
2198 describe_range_error(errcode); | |
2199 return JNI_EINVAL; | |
2200 } | |
1064 | 2201 FLAG_SET_CMDLINE(uintx, MaxHeapSize, (uintx)long_max_heap_size); |
0 | 2202 // Xmaxf |
2203 } else if (match_option(option, "-Xmaxf", &tail)) { | |
2204 int maxf = (int)(atof(tail) * 100); | |
2205 if (maxf < 0 || maxf > 100) { | |
2206 jio_fprintf(defaultStream::error_stream(), | |
2207 "Bad max heap free percentage size: %s\n", | |
2208 option->optionString); | |
2209 return JNI_EINVAL; | |
2210 } else { | |
2211 FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf); | |
2212 } | |
2213 // Xminf | |
2214 } else if (match_option(option, "-Xminf", &tail)) { | |
2215 int minf = (int)(atof(tail) * 100); | |
2216 if (minf < 0 || minf > 100) { | |
2217 jio_fprintf(defaultStream::error_stream(), | |
2218 "Bad min heap free percentage size: %s\n", | |
2219 option->optionString); | |
2220 return JNI_EINVAL; | |
2221 } else { | |
2222 FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf); | |
2223 } | |
2224 // -Xss | |
2225 } else if (match_option(option, "-Xss", &tail)) { | |
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2226 julong long_ThreadStackSize = 0; |
0 | 2227 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000); |
2228 if (errcode != arg_in_range) { | |
2229 jio_fprintf(defaultStream::error_stream(), | |
2230 "Invalid thread stack size: %s\n", option->optionString); | |
2231 describe_range_error(errcode); | |
2232 return JNI_EINVAL; | |
2233 } | |
2234 // Internally track ThreadStackSize in units of 1024 bytes. | |
2235 FLAG_SET_CMDLINE(intx, ThreadStackSize, | |
2236 round_to((int)long_ThreadStackSize, K) / K); | |
2237 // -Xoss | |
2238 } else if (match_option(option, "-Xoss", &tail)) { | |
2239 // HotSpot does not have separate native and Java stacks, ignore silently for compatibility | |
2240 // -Xmaxjitcodesize | |
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2241 } else if (match_option(option, "-Xmaxjitcodesize", &tail) || |
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2242 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) { |
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2243 julong long_ReservedCodeCacheSize = 0; |
0 | 2244 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, |
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2245 (size_t)InitialCodeCacheSize); |
0 | 2246 if (errcode != arg_in_range) { |
2247 jio_fprintf(defaultStream::error_stream(), | |
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2248 "Invalid maximum code cache size: %s. Should be greater than InitialCodeCacheSize=%dK\n", |
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2249 option->optionString, InitialCodeCacheSize/K); |
0 | 2250 describe_range_error(errcode); |
2251 return JNI_EINVAL; | |
2252 } | |
2253 FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize); | |
2254 // -green | |
2255 } else if (match_option(option, "-green", &tail)) { | |
2256 jio_fprintf(defaultStream::error_stream(), | |
2257 "Green threads support not available\n"); | |
2258 return JNI_EINVAL; | |
2259 // -native | |
2260 } else if (match_option(option, "-native", &tail)) { | |
2261 // HotSpot always uses native threads, ignore silently for compatibility | |
2262 // -Xsqnopause | |
2263 } else if (match_option(option, "-Xsqnopause", &tail)) { | |
2264 // EVM option, ignore silently for compatibility | |
2265 // -Xrs | |
2266 } else if (match_option(option, "-Xrs", &tail)) { | |
2267 // Classic/EVM option, new functionality | |
2268 FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true); | |
2269 } else if (match_option(option, "-Xusealtsigs", &tail)) { | |
2270 // change default internal VM signals used - lower case for back compat | |
2271 FLAG_SET_CMDLINE(bool, UseAltSigs, true); | |
2272 // -Xoptimize | |
2273 } else if (match_option(option, "-Xoptimize", &tail)) { | |
2274 // EVM option, ignore silently for compatibility | |
2275 // -Xprof | |
2276 } else if (match_option(option, "-Xprof", &tail)) { | |
2277 #ifndef FPROF_KERNEL | |
2278 _has_profile = true; | |
2279 #else // FPROF_KERNEL | |
2280 // do we have to exit? | |
2281 warning("Kernel VM does not support flat profiling."); | |
2282 #endif // FPROF_KERNEL | |
2283 // -Xaprof | |
2284 } else if (match_option(option, "-Xaprof", &tail)) { | |
2285 _has_alloc_profile = true; | |
2286 // -Xconcurrentio | |
2287 } else if (match_option(option, "-Xconcurrentio", &tail)) { | |
2288 FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true); | |
2289 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false); | |
2290 FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1); | |
2291 FLAG_SET_CMDLINE(bool, UseTLAB, false); | |
2292 FLAG_SET_CMDLINE(uintx, NewSizeThreadIncrease, 16 * K); // 20Kb per thread added to new generation | |
2293 | |
2294 // -Xinternalversion | |
2295 } else if (match_option(option, "-Xinternalversion", &tail)) { | |
2296 jio_fprintf(defaultStream::output_stream(), "%s\n", | |
2297 VM_Version::internal_vm_info_string()); | |
2298 vm_exit(0); | |
2299 #ifndef PRODUCT | |
2300 // -Xprintflags | |
2301 } else if (match_option(option, "-Xprintflags", &tail)) { | |
2302 CommandLineFlags::printFlags(); | |
2303 vm_exit(0); | |
2304 #endif | |
2305 // -D | |
2306 } else if (match_option(option, "-D", &tail)) { | |
2307 if (!add_property(tail)) { | |
2308 return JNI_ENOMEM; | |
2309 } | |
2310 // Out of the box management support | |
2311 if (match_option(option, "-Dcom.sun.management", &tail)) { | |
2312 FLAG_SET_CMDLINE(bool, ManagementServer, true); | |
2313 } | |
2314 // -Xint | |
2315 } else if (match_option(option, "-Xint", &tail)) { | |
2316 set_mode_flags(_int); | |
2317 // -Xmixed | |
2318 } else if (match_option(option, "-Xmixed", &tail)) { | |
2319 set_mode_flags(_mixed); | |
2320 // -Xcomp | |
2321 } else if (match_option(option, "-Xcomp", &tail)) { | |
2322 // for testing the compiler; turn off all flags that inhibit compilation | |
2323 set_mode_flags(_comp); | |
2324 | |
2325 // -Xshare:dump | |
2326 } else if (match_option(option, "-Xshare:dump", &tail)) { | |
2327 #ifdef TIERED | |
2328 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); | |
2329 set_mode_flags(_int); // Prevent compilation, which creates objects | |
2330 #elif defined(COMPILER2) | |
2331 vm_exit_during_initialization( | |
2332 "Dumping a shared archive is not supported on the Server JVM.", NULL); | |
2333 #elif defined(KERNEL) | |
2334 vm_exit_during_initialization( | |
2335 "Dumping a shared archive is not supported on the Kernel JVM.", NULL); | |
2336 #else | |
2337 FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true); | |
2338 set_mode_flags(_int); // Prevent compilation, which creates objects | |
2339 #endif | |
2340 // -Xshare:on | |
2341 } else if (match_option(option, "-Xshare:on", &tail)) { | |
2342 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); | |
2343 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true); | |
2344 // -Xshare:auto | |
2345 } else if (match_option(option, "-Xshare:auto", &tail)) { | |
2346 FLAG_SET_CMDLINE(bool, UseSharedSpaces, true); | |
2347 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); | |
2348 // -Xshare:off | |
2349 } else if (match_option(option, "-Xshare:off", &tail)) { | |
2350 FLAG_SET_CMDLINE(bool, UseSharedSpaces, false); | |
2351 FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false); | |
2352 | |
2353 // -Xverify | |
2354 } else if (match_option(option, "-Xverify", &tail)) { | |
2355 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) { | |
2356 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true); | |
2357 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); | |
2358 } else if (strcmp(tail, ":remote") == 0) { | |
2359 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); | |
2360 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true); | |
2361 } else if (strcmp(tail, ":none") == 0) { | |
2362 FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false); | |
2363 FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false); | |
2364 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) { | |
2365 return JNI_EINVAL; | |
2366 } | |
2367 // -Xdebug | |
2368 } else if (match_option(option, "-Xdebug", &tail)) { | |
2369 // note this flag has been used, then ignore | |
2370 set_xdebug_mode(true); | |
2371 // -Xnoagent | |
2372 } else if (match_option(option, "-Xnoagent", &tail)) { | |
2373 // For compatibility with classic. HotSpot refuses to load the old style agent.dll. | |
2374 } else if (match_option(option, "-Xboundthreads", &tail)) { | |
2375 // Bind user level threads to kernel threads (Solaris only) | |
2376 FLAG_SET_CMDLINE(bool, UseBoundThreads, true); | |
2377 } else if (match_option(option, "-Xloggc:", &tail)) { | |
2378 // Redirect GC output to the file. -Xloggc:<filename> | |
2379 // ostream_init_log(), when called will use this filename | |
2380 // to initialize a fileStream. | |
2381 _gc_log_filename = strdup(tail); | |
2382 FLAG_SET_CMDLINE(bool, PrintGC, true); | |
2383 FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true); | |
2384 | |
2385 // JNI hooks | |
2386 } else if (match_option(option, "-Xcheck", &tail)) { | |
2387 if (!strcmp(tail, ":jni")) { | |
2388 CheckJNICalls = true; | |
2389 } else if (is_bad_option(option, args->ignoreUnrecognized, | |
2390 "check")) { | |
2391 return JNI_EINVAL; | |
2392 } | |
2393 } else if (match_option(option, "vfprintf", &tail)) { | |
2394 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo); | |
2395 } else if (match_option(option, "exit", &tail)) { | |
2396 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo); | |
2397 } else if (match_option(option, "abort", &tail)) { | |
2398 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo); | |
2399 // -XX:+AggressiveHeap | |
2400 } else if (match_option(option, "-XX:+AggressiveHeap", &tail)) { | |
2401 | |
2402 // This option inspects the machine and attempts to set various | |
2403 // parameters to be optimal for long-running, memory allocation | |
2404 // intensive jobs. It is intended for machines with large | |
2405 // amounts of cpu and memory. | |
2406 | |
2407 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit | |
2408 // VM, but we may not be able to represent the total physical memory | |
2409 // available (like having 8gb of memory on a box but using a 32bit VM). | |
2410 // Thus, we need to make sure we're using a julong for intermediate | |
2411 // calculations. | |
2412 julong initHeapSize; | |
2413 julong total_memory = os::physical_memory(); | |
2414 | |
2415 if (total_memory < (julong)256*M) { | |
2416 jio_fprintf(defaultStream::error_stream(), | |
2417 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n"); | |
2418 vm_exit(1); | |
2419 } | |
2420 | |
2421 // The heap size is half of available memory, or (at most) | |
2422 // all of possible memory less 160mb (leaving room for the OS | |
2423 // when using ISM). This is the maximum; because adaptive sizing | |
2424 // is turned on below, the actual space used may be smaller. | |
2425 | |
2426 initHeapSize = MIN2(total_memory / (julong)2, | |
2427 total_memory - (julong)160*M); | |
2428 | |
2429 // Make sure that if we have a lot of memory we cap the 32 bit | |
2430 // process space. The 64bit VM version of this function is a nop. | |
2431 initHeapSize = os::allocatable_physical_memory(initHeapSize); | |
2432 | |
2433 // The perm gen is separate but contiguous with the | |
2434 // object heap (and is reserved with it) so subtract it | |
2435 // from the heap size. | |
2436 if (initHeapSize > MaxPermSize) { | |
2437 initHeapSize = initHeapSize - MaxPermSize; | |
2438 } else { | |
2439 warning("AggressiveHeap and MaxPermSize values may conflict"); | |
2440 } | |
2441 | |
2442 if (FLAG_IS_DEFAULT(MaxHeapSize)) { | |
2443 FLAG_SET_CMDLINE(uintx, MaxHeapSize, initHeapSize); | |
1064 | 2444 FLAG_SET_CMDLINE(uintx, InitialHeapSize, initHeapSize); |
0 | 2445 // Currently the minimum size and the initial heap sizes are the same. |
1064 | 2446 set_min_heap_size(initHeapSize); |
0 | 2447 } |
2448 if (FLAG_IS_DEFAULT(NewSize)) { | |
2449 // Make the young generation 3/8ths of the total heap. | |
2450 FLAG_SET_CMDLINE(uintx, NewSize, | |
2451 ((julong)MaxHeapSize / (julong)8) * (julong)3); | |
2452 FLAG_SET_CMDLINE(uintx, MaxNewSize, NewSize); | |
2453 } | |
2454 | |
2455 FLAG_SET_DEFAULT(UseLargePages, true); | |
2456 | |
2457 // Increase some data structure sizes for efficiency | |
2458 FLAG_SET_CMDLINE(uintx, BaseFootPrintEstimate, MaxHeapSize); | |
2459 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); | |
2460 FLAG_SET_CMDLINE(uintx, TLABSize, 256*K); | |
2461 | |
2462 // See the OldPLABSize comment below, but replace 'after promotion' | |
2463 // with 'after copying'. YoungPLABSize is the size of the survivor | |
2464 // space per-gc-thread buffers. The default is 4kw. | |
2465 FLAG_SET_CMDLINE(uintx, YoungPLABSize, 256*K); // Note: this is in words | |
2466 | |
2467 // OldPLABSize is the size of the buffers in the old gen that | |
2468 // UseParallelGC uses to promote live data that doesn't fit in the | |
2469 // survivor spaces. At any given time, there's one for each gc thread. | |
2470 // The default size is 1kw. These buffers are rarely used, since the | |
2471 // survivor spaces are usually big enough. For specjbb, however, there | |
2472 // are occasions when there's lots of live data in the young gen | |
2473 // and we end up promoting some of it. We don't have a definite | |
2474 // explanation for why bumping OldPLABSize helps, but the theory | |
2475 // is that a bigger PLAB results in retaining something like the | |
2476 // original allocation order after promotion, which improves mutator | |
2477 // locality. A minor effect may be that larger PLABs reduce the | |
2478 // number of PLAB allocation events during gc. The value of 8kw | |
2479 // was arrived at by experimenting with specjbb. | |
2480 FLAG_SET_CMDLINE(uintx, OldPLABSize, 8*K); // Note: this is in words | |
2481 | |
2482 // CompilationPolicyChoice=0 causes the server compiler to adopt | |
2483 // a more conservative which-method-do-I-compile policy when one | |
2484 // of the counters maintained by the interpreter trips. The | |
2485 // result is reduced startup time and improved specjbb and | |
2486 // alacrity performance. Zero is the default, but we set it | |
2487 // explicitly here in case the default changes. | |
2488 // See runtime/compilationPolicy.*. | |
2489 FLAG_SET_CMDLINE(intx, CompilationPolicyChoice, 0); | |
2490 | |
2491 // Enable parallel GC and adaptive generation sizing | |
2492 FLAG_SET_CMDLINE(bool, UseParallelGC, true); | |
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2493 FLAG_SET_DEFAULT(ParallelGCThreads, |
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2494 Abstract_VM_Version::parallel_worker_threads()); |
0 | 2495 |
2496 // Encourage steady state memory management | |
2497 FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100); | |
2498 | |
2499 // This appears to improve mutator locality | |
2500 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); | |
2501 | |
2502 // Get around early Solaris scheduling bug | |
2503 // (affinity vs other jobs on system) | |
2504 // but disallow DR and offlining (5008695). | |
2505 FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true); | |
2506 | |
2507 } else if (match_option(option, "-XX:+NeverTenure", &tail)) { | |
2508 // The last option must always win. | |
2509 FLAG_SET_CMDLINE(bool, AlwaysTenure, false); | |
2510 FLAG_SET_CMDLINE(bool, NeverTenure, true); | |
2511 } else if (match_option(option, "-XX:+AlwaysTenure", &tail)) { | |
2512 // The last option must always win. | |
2513 FLAG_SET_CMDLINE(bool, NeverTenure, false); | |
2514 FLAG_SET_CMDLINE(bool, AlwaysTenure, true); | |
2515 } else if (match_option(option, "-XX:+CMSPermGenSweepingEnabled", &tail) || | |
2516 match_option(option, "-XX:-CMSPermGenSweepingEnabled", &tail)) { | |
2517 jio_fprintf(defaultStream::error_stream(), | |
2518 "Please use CMSClassUnloadingEnabled in place of " | |
2519 "CMSPermGenSweepingEnabled in the future\n"); | |
2520 } else if (match_option(option, "-XX:+UseGCTimeLimit", &tail)) { | |
2521 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, true); | |
2522 jio_fprintf(defaultStream::error_stream(), | |
2523 "Please use -XX:+UseGCOverheadLimit in place of " | |
2524 "-XX:+UseGCTimeLimit in the future\n"); | |
2525 } else if (match_option(option, "-XX:-UseGCTimeLimit", &tail)) { | |
2526 FLAG_SET_CMDLINE(bool, UseGCOverheadLimit, false); | |
2527 jio_fprintf(defaultStream::error_stream(), | |
2528 "Please use -XX:-UseGCOverheadLimit in place of " | |
2529 "-XX:-UseGCTimeLimit in the future\n"); | |
2530 // The TLE options are for compatibility with 1.3 and will be | |
2531 // removed without notice in a future release. These options | |
2532 // are not to be documented. | |
2533 } else if (match_option(option, "-XX:MaxTLERatio=", &tail)) { | |
2534 // No longer used. | |
2535 } else if (match_option(option, "-XX:+ResizeTLE", &tail)) { | |
2536 FLAG_SET_CMDLINE(bool, ResizeTLAB, true); | |
2537 } else if (match_option(option, "-XX:-ResizeTLE", &tail)) { | |
2538 FLAG_SET_CMDLINE(bool, ResizeTLAB, false); | |
2539 } else if (match_option(option, "-XX:+PrintTLE", &tail)) { | |
2540 FLAG_SET_CMDLINE(bool, PrintTLAB, true); | |
2541 } else if (match_option(option, "-XX:-PrintTLE", &tail)) { | |
2542 FLAG_SET_CMDLINE(bool, PrintTLAB, false); | |
2543 } else if (match_option(option, "-XX:TLEFragmentationRatio=", &tail)) { | |
2544 // No longer used. | |
2545 } else if (match_option(option, "-XX:TLESize=", &tail)) { | |
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2546 julong long_tlab_size = 0; |
0 | 2547 ArgsRange errcode = parse_memory_size(tail, &long_tlab_size, 1); |
2548 if (errcode != arg_in_range) { | |
2549 jio_fprintf(defaultStream::error_stream(), | |
2550 "Invalid TLAB size: %s\n", option->optionString); | |
2551 describe_range_error(errcode); | |
2552 return JNI_EINVAL; | |
2553 } | |
2554 FLAG_SET_CMDLINE(uintx, TLABSize, long_tlab_size); | |
2555 } else if (match_option(option, "-XX:TLEThreadRatio=", &tail)) { | |
2556 // No longer used. | |
2557 } else if (match_option(option, "-XX:+UseTLE", &tail)) { | |
2558 FLAG_SET_CMDLINE(bool, UseTLAB, true); | |
2559 } else if (match_option(option, "-XX:-UseTLE", &tail)) { | |
2560 FLAG_SET_CMDLINE(bool, UseTLAB, false); | |
2561 SOLARIS_ONLY( | |
2562 } else if (match_option(option, "-XX:+UsePermISM", &tail)) { | |
2563 warning("-XX:+UsePermISM is obsolete."); | |
2564 FLAG_SET_CMDLINE(bool, UseISM, true); | |
2565 } else if (match_option(option, "-XX:-UsePermISM", &tail)) { | |
2566 FLAG_SET_CMDLINE(bool, UseISM, false); | |
2567 ) | |
2568 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr", &tail)) { | |
2569 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false); | |
2570 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true); | |
2571 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout", &tail)) { | |
2572 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false); | |
2573 FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true); | |
2574 } else if (match_option(option, "-XX:+ExtendedDTraceProbes", &tail)) { | |
2575 #ifdef SOLARIS | |
2576 FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true); | |
2577 FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true); | |
2578 FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true); | |
2579 FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true); | |
2580 #else // ndef SOLARIS | |
2581 jio_fprintf(defaultStream::error_stream(), | |
2582 "ExtendedDTraceProbes flag is only applicable on Solaris\n"); | |
2583 return JNI_EINVAL; | |
2584 #endif // ndef SOLARIS | |
2585 #ifdef ASSERT | |
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|
2586 } else if (match_option(option, "-XX:+FullGCALot", &tail)) { |
0 | 2587 FLAG_SET_CMDLINE(bool, FullGCALot, true); |
2588 // disable scavenge before parallel mark-compact | |
2589 FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false); | |
2590 #endif | |
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2591 } else if (match_option(option, "-XX:CMSParPromoteBlocksToClaim=", &tail)) { |
0 | 2592 julong cms_blocks_to_claim = (julong)atol(tail); |
2593 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); | |
2594 jio_fprintf(defaultStream::error_stream(), | |
1145
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2595 "Please use -XX:OldPLABSize in place of " |
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|
2596 "-XX:CMSParPromoteBlocksToClaim in the future\n"); |
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6631166: CMS: better heuristics when combatting fragmentation
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diff
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|
2597 } else if (match_option(option, "-XX:ParCMSPromoteBlocksToClaim=", &tail)) { |
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6631166: CMS: better heuristics when combatting fragmentation
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|
2598 julong cms_blocks_to_claim = (julong)atol(tail); |
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|
2599 FLAG_SET_CMDLINE(uintx, CMSParPromoteBlocksToClaim, cms_blocks_to_claim); |
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6631166: CMS: better heuristics when combatting fragmentation
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|
2600 jio_fprintf(defaultStream::error_stream(), |
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6631166: CMS: better heuristics when combatting fragmentation
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|
2601 "Please use -XX:OldPLABSize in place of " |
0 | 2602 "-XX:ParCMSPromoteBlocksToClaim in the future\n"); |
1145
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|
2603 } else if (match_option(option, "-XX:ParallelGCOldGenAllocBufferSize=", &tail)) { |
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|
2604 julong old_plab_size = 0; |
0 | 2605 ArgsRange errcode = parse_memory_size(tail, &old_plab_size, 1); |
2606 if (errcode != arg_in_range) { | |
2607 jio_fprintf(defaultStream::error_stream(), | |
2608 "Invalid old PLAB size: %s\n", option->optionString); | |
2609 describe_range_error(errcode); | |
2610 return JNI_EINVAL; | |
2611 } | |
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diff
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|
2612 FLAG_SET_CMDLINE(uintx, OldPLABSize, old_plab_size); |
0 | 2613 jio_fprintf(defaultStream::error_stream(), |
2614 "Please use -XX:OldPLABSize in place of " | |
2615 "-XX:ParallelGCOldGenAllocBufferSize in the future\n"); | |
1145
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|
2616 } else if (match_option(option, "-XX:ParallelGCToSpaceAllocBufferSize=", &tail)) { |
489
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diff
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|
2617 julong young_plab_size = 0; |
0 | 2618 ArgsRange errcode = parse_memory_size(tail, &young_plab_size, 1); |
2619 if (errcode != arg_in_range) { | |
2620 jio_fprintf(defaultStream::error_stream(), | |
2621 "Invalid young PLAB size: %s\n", option->optionString); | |
2622 describe_range_error(errcode); | |
2623 return JNI_EINVAL; | |
2624 } | |
489
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swamyv
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483
diff
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|
2625 FLAG_SET_CMDLINE(uintx, YoungPLABSize, young_plab_size); |
0 | 2626 jio_fprintf(defaultStream::error_stream(), |
2627 "Please use -XX:YoungPLABSize in place of " | |
2628 "-XX:ParallelGCToSpaceAllocBufferSize in the future\n"); | |
1284 | 2629 } else if (match_option(option, "-XX:CMSMarkStackSize=", &tail) || |
2630 match_option(option, "-XX:G1MarkStackSize=", &tail)) { | |
2631 julong stack_size = 0; | |
2632 ArgsRange errcode = parse_memory_size(tail, &stack_size, 1); | |
2633 if (errcode != arg_in_range) { | |
2634 jio_fprintf(defaultStream::error_stream(), | |
2635 "Invalid mark stack size: %s\n", option->optionString); | |
2636 describe_range_error(errcode); | |
2637 return JNI_EINVAL; | |
2638 } | |
2639 FLAG_SET_CMDLINE(uintx, MarkStackSize, stack_size); | |
2640 } else if (match_option(option, "-XX:CMSMarkStackSizeMax=", &tail)) { | |
2641 julong max_stack_size = 0; | |
2642 ArgsRange errcode = parse_memory_size(tail, &max_stack_size, 1); | |
2643 if (errcode != arg_in_range) { | |
2644 jio_fprintf(defaultStream::error_stream(), | |
2645 "Invalid maximum mark stack size: %s\n", | |
2646 option->optionString); | |
2647 describe_range_error(errcode); | |
2648 return JNI_EINVAL; | |
2649 } | |
2650 FLAG_SET_CMDLINE(uintx, MarkStackSizeMax, max_stack_size); | |
2651 } else if (match_option(option, "-XX:ParallelMarkingThreads=", &tail) || | |
2652 match_option(option, "-XX:ParallelCMSThreads=", &tail)) { | |
2653 uintx conc_threads = 0; | |
2654 if (!parse_uintx(tail, &conc_threads, 1)) { | |
2655 jio_fprintf(defaultStream::error_stream(), | |
2656 "Invalid concurrent threads: %s\n", option->optionString); | |
2657 return JNI_EINVAL; | |
2658 } | |
2659 FLAG_SET_CMDLINE(uintx, ConcGCThreads, conc_threads); | |
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1074
diff
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|
2660 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx |
0 | 2661 // Skip -XX:Flags= since that case has already been handled |
2662 if (strncmp(tail, "Flags=", strlen("Flags=")) != 0) { | |
2663 if (!process_argument(tail, args->ignoreUnrecognized, origin)) { | |
2664 return JNI_EINVAL; | |
2665 } | |
2666 } | |
2667 // Unknown option | |
2668 } else if (is_bad_option(option, args->ignoreUnrecognized)) { | |
2669 return JNI_ERR; | |
2670 } | |
2671 } | |
449
171e581e8161
6554406: Change switch UseVMInterruptibleIO default to false (sol)
xlu
parents:
420
diff
changeset
|
2672 // 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
|
2673 // when working with older JDKs. |
171e581e8161
6554406: Change switch UseVMInterruptibleIO default to false (sol)
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parents:
420
diff
changeset
|
2674 if (JDK_Version::current().compare_major(6) <= 0 && |
171e581e8161
6554406: Change switch UseVMInterruptibleIO default to false (sol)
xlu
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420
diff
changeset
|
2675 FLAG_IS_DEFAULT(UseVMInterruptibleIO)) { |
171e581e8161
6554406: Change switch UseVMInterruptibleIO default to false (sol)
xlu
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420
diff
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|
2676 FLAG_SET_DEFAULT(UseVMInterruptibleIO, true); |
171e581e8161
6554406: Change switch UseVMInterruptibleIO default to false (sol)
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420
diff
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|
2677 } |
1679
3d90023429ec
6888526: Linux getCurrentThreadCpuTime is drastically slower than Windows
aph
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1628
diff
changeset
|
2678 #ifdef LINUX |
3d90023429ec
6888526: Linux getCurrentThreadCpuTime is drastically slower than Windows
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1628
diff
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|
2679 if (JDK_Version::current().compare_major(6) <= 0 && |
3d90023429ec
6888526: Linux getCurrentThreadCpuTime is drastically slower than Windows
aph
parents:
1628
diff
changeset
|
2680 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) { |
3d90023429ec
6888526: Linux getCurrentThreadCpuTime is drastically slower than Windows
aph
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1628
diff
changeset
|
2681 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false); |
3d90023429ec
6888526: Linux getCurrentThreadCpuTime is drastically slower than Windows
aph
parents:
1628
diff
changeset
|
2682 } |
3d90023429ec
6888526: Linux getCurrentThreadCpuTime is drastically slower than Windows
aph
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1628
diff
changeset
|
2683 #endif // LINUX |
0 | 2684 return JNI_OK; |
2685 } | |
2686 | |
2687 jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) { | |
2688 // This must be done after all -D arguments have been processed. | |
2689 scp_p->expand_endorsed(); | |
2690 | |
2691 if (scp_assembly_required || scp_p->get_endorsed() != NULL) { | |
2692 // Assemble the bootclasspath elements into the final path. | |
2693 Arguments::set_sysclasspath(scp_p->combined_path()); | |
2694 } | |
2695 | |
2696 // This must be done after all arguments have been processed. | |
2697 // java_compiler() true means set to "NONE" or empty. | |
2698 if (java_compiler() && !xdebug_mode()) { | |
2699 // For backwards compatibility, we switch to interpreted mode if | |
2700 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was | |
2701 // not specified. | |
2702 set_mode_flags(_int); | |
2703 } | |
2704 if (CompileThreshold == 0) { | |
2705 set_mode_flags(_int); | |
2706 } | |
2707 | |
2708 #ifndef COMPILER2 | |
2709 // Don't degrade server performance for footprint | |
2710 if (FLAG_IS_DEFAULT(UseLargePages) && | |
2711 MaxHeapSize < LargePageHeapSizeThreshold) { | |
2712 // No need for large granularity pages w/small heaps. | |
2713 // Note that large pages are enabled/disabled for both the | |
2714 // Java heap and the code cache. | |
2715 FLAG_SET_DEFAULT(UseLargePages, false); | |
2716 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseMPSS, false)); | |
2717 SOLARIS_ONLY(FLAG_SET_DEFAULT(UseISM, false)); | |
2718 } | |
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37f87013dfd8
6711316: Open source the Garbage-First garbage collector
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135
diff
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|
2719 |
1251
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
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1188
diff
changeset
|
2720 // Tiered compilation is undefined with C1. |
576e77447e3c
6923002: assert(false,"this call site should not be polymorphic")
kvn
parents:
1188
diff
changeset
|
2721 TieredCompilation = false; |
0 | 2722 #else |
2723 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) { | |
2724 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1); | |
2725 } | |
2726 #endif | |
2727 | |
1681
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1679
diff
changeset
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2728 // If we are running in a headless jre, force java.awt.headless property |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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1679
diff
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|
2729 // to be true unless the property has already been set. |
126ea7725993
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1679
diff
changeset
|
2730 // 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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|
2731 if (os::is_headless_jre()) { |
126ea7725993
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bobv
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1679
diff
changeset
|
2732 const char* headless = Arguments::get_property("java.awt.headless"); |
126ea7725993
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1679
diff
changeset
|
2733 if (headless == NULL) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
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1679
diff
changeset
|
2734 char envbuffer[128]; |
126ea7725993
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1679
diff
changeset
|
2735 if (!os::getenv("JAVA_AWT_HEADLESS", envbuffer, sizeof(envbuffer))) { |
126ea7725993
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bobv
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diff
changeset
|
2736 if (!add_property("java.awt.headless=true")) { |
126ea7725993
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bobv
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1679
diff
changeset
|
2737 return JNI_ENOMEM; |
126ea7725993
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1679
diff
changeset
|
2738 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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1679
diff
changeset
|
2739 } else { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
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1679
diff
changeset
|
2740 char buffer[256]; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
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1679
diff
changeset
|
2741 strcpy(buffer, "java.awt.headless="); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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1679
diff
changeset
|
2742 strcat(buffer, envbuffer); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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1679
diff
changeset
|
2743 if (!add_property(buffer)) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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1679
diff
changeset
|
2744 return JNI_ENOMEM; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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1679
diff
changeset
|
2745 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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1679
diff
changeset
|
2746 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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1679
diff
changeset
|
2747 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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diff
changeset
|
2748 } |
126ea7725993
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|
2749 |
0 | 2750 if (!check_vm_args_consistency()) { |
2751 return JNI_ERR; | |
2752 } | |
2753 | |
2754 return JNI_OK; | |
2755 } | |
2756 | |
2757 jint Arguments::parse_java_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { | |
2758 return parse_options_environment_variable("_JAVA_OPTIONS", scp_p, | |
2759 scp_assembly_required_p); | |
2760 } | |
2761 | |
2762 jint Arguments::parse_java_tool_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p) { | |
2763 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", scp_p, | |
2764 scp_assembly_required_p); | |
2765 } | |
2766 | |
2767 jint Arguments::parse_options_environment_variable(const char* name, SysClassPath* scp_p, bool* scp_assembly_required_p) { | |
2768 const int N_MAX_OPTIONS = 64; | |
2769 const int OPTION_BUFFER_SIZE = 1024; | |
2770 char buffer[OPTION_BUFFER_SIZE]; | |
2771 | |
2772 // The variable will be ignored if it exceeds the length of the buffer. | |
2773 // Don't check this variable if user has special privileges | |
2774 // (e.g. unix su command). | |
2775 if (os::getenv(name, buffer, sizeof(buffer)) && | |
2776 !os::have_special_privileges()) { | |
2777 JavaVMOption options[N_MAX_OPTIONS]; // Construct option array | |
2778 jio_fprintf(defaultStream::error_stream(), | |
2779 "Picked up %s: %s\n", name, buffer); | |
2780 char* rd = buffer; // pointer to the input string (rd) | |
2781 int i; | |
2782 for (i = 0; i < N_MAX_OPTIONS;) { // repeat for all options in the input string | |
2783 while (isspace(*rd)) rd++; // skip whitespace | |
2784 if (*rd == 0) break; // we re done when the input string is read completely | |
2785 | |
2786 // The output, option string, overwrites the input string. | |
2787 // Because of quoting, the pointer to the option string (wrt) may lag the pointer to | |
2788 // input string (rd). | |
2789 char* wrt = rd; | |
2790 | |
2791 options[i++].optionString = wrt; // Fill in option | |
2792 while (*rd != 0 && !isspace(*rd)) { // unquoted strings terminate with a space or NULL | |
2793 if (*rd == '\'' || *rd == '"') { // handle a quoted string | |
2794 int quote = *rd; // matching quote to look for | |
2795 rd++; // don't copy open quote | |
2796 while (*rd != quote) { // include everything (even spaces) up until quote | |
2797 if (*rd == 0) { // string termination means unmatched string | |
2798 jio_fprintf(defaultStream::error_stream(), | |
2799 "Unmatched quote in %s\n", name); | |
2800 return JNI_ERR; | |
2801 } | |
2802 *wrt++ = *rd++; // copy to option string | |
2803 } | |
2804 rd++; // don't copy close quote | |
2805 } else { | |
2806 *wrt++ = *rd++; // copy to option string | |
2807 } | |
2808 } | |
2809 // Need to check if we're done before writing a NULL, | |
2810 // because the write could be to the byte that rd is pointing to. | |
2811 if (*rd++ == 0) { | |
2812 *wrt = 0; | |
2813 break; | |
2814 } | |
2815 *wrt = 0; // Zero terminate option | |
2816 } | |
2817 // Construct JavaVMInitArgs structure and parse as if it was part of the command line | |
2818 JavaVMInitArgs vm_args; | |
2819 vm_args.version = JNI_VERSION_1_2; | |
2820 vm_args.options = options; | |
2821 vm_args.nOptions = i; | |
564 | 2822 vm_args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions; |
0 | 2823 |
2824 if (PrintVMOptions) { | |
2825 const char* tail; | |
2826 for (int i = 0; i < vm_args.nOptions; i++) { | |
2827 const JavaVMOption *option = vm_args.options + i; | |
2828 if (match_option(option, "-XX:", &tail)) { | |
2829 logOption(tail); | |
2830 } | |
2831 } | |
2832 } | |
2833 | |
2834 return(parse_each_vm_init_arg(&vm_args, scp_p, scp_assembly_required_p, ENVIRON_VAR)); | |
2835 } | |
2836 return JNI_OK; | |
2837 } | |
2838 | |
2362
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2302
diff
changeset
|
2839 void Arguments::set_shared_spaces_flags() { |
2378 | 2840 const bool must_share = DumpSharedSpaces || RequireSharedSpaces; |
2841 const bool might_share = must_share || UseSharedSpaces; | |
2842 | |
2843 // The string table is part of the shared archive so the size must match. | |
2844 if (!FLAG_IS_DEFAULT(StringTableSize)) { | |
2845 // Disable sharing. | |
2846 if (must_share) { | |
2847 warning("disabling shared archive %s because of non-default " | |
2848 "StringTableSize", DumpSharedSpaces ? "creation" : "use"); | |
2849 } | |
2850 if (might_share) { | |
2851 FLAG_SET_DEFAULT(DumpSharedSpaces, false); | |
2852 FLAG_SET_DEFAULT(RequireSharedSpaces, false); | |
2853 FLAG_SET_DEFAULT(UseSharedSpaces, false); | |
2854 } | |
2855 return; | |
2856 } | |
2857 | |
2362
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2858 // Check whether class data sharing settings conflict with GC, compressed oops |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2859 // 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
|
2860 // settings. |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2861 const bool cannot_share = UseConcMarkSweepGC || CMSIncrementalMode || |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2862 UseG1GC || UseParNewGC || UseParallelGC || UseParallelOldGC || |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2863 UseCompressedOops || UseLargePages && FLAG_IS_CMDLINE(UseLargePages); |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2864 if (cannot_share) { |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2865 if (must_share) { |
2378 | 2866 warning("selecting serial gc and disabling large pages %s" |
2867 "because of %s", "" LP64_ONLY("and compressed oops "), | |
2868 DumpSharedSpaces ? "-Xshare:dump" : "-Xshare:on"); | |
2869 force_serial_gc(); | |
2870 FLAG_SET_CMDLINE(bool, UseLargePages, false); | |
2871 LP64_ONLY(FLAG_SET_CMDLINE(bool, UseCompressedOops, false)); | |
2362
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2872 } else { |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2873 if (UseSharedSpaces && Verbose) { |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2874 warning("turning off use of shared archive because of " |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2875 "choice of garbage collector or large pages"); |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2876 } |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2877 no_shared_spaces(); |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2878 } |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2879 } else if (UseLargePages && might_share) { |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2880 // Disable large pages to allow shared spaces. This is sub-optimal, since |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2881 // there may not even be a shared archive to use. |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2882 FLAG_SET_DEFAULT(UseLargePages, false); |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2883 } |
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
2884 } |
1891
9de67bf4244d
6996136: VM crash in src/share/vm/runtime/virtualspace.cpp:424
iveresov
parents:
1890
diff
changeset
|
2885 |
0 | 2886 // Parse entry point called from JNI_CreateJavaVM |
2887 | |
2888 jint Arguments::parse(const JavaVMInitArgs* args) { | |
2889 | |
2890 // Sharing support | |
2891 // Construct the path to the archive | |
2892 char jvm_path[JVM_MAXPATHLEN]; | |
2893 os::jvm_path(jvm_path, sizeof(jvm_path)); | |
2894 #ifdef TIERED | |
2895 if (strstr(jvm_path, "client") != NULL) { | |
2896 force_client_mode = true; | |
2897 } | |
2898 #endif // TIERED | |
2899 char *end = strrchr(jvm_path, *os::file_separator()); | |
2900 if (end != NULL) *end = '\0'; | |
2901 char *shared_archive_path = NEW_C_HEAP_ARRAY(char, strlen(jvm_path) + | |
2902 strlen(os::file_separator()) + 20); | |
2903 if (shared_archive_path == NULL) return JNI_ENOMEM; | |
2904 strcpy(shared_archive_path, jvm_path); | |
2905 strcat(shared_archive_path, os::file_separator()); | |
2906 strcat(shared_archive_path, "classes"); | |
2907 DEBUG_ONLY(strcat(shared_archive_path, "_g");) | |
2908 strcat(shared_archive_path, ".jsa"); | |
2909 SharedArchivePath = shared_archive_path; | |
2910 | |
2911 // Remaining part of option string | |
2912 const char* tail; | |
2913 | |
2914 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed. | |
2915 bool settings_file_specified = false; | |
564 | 2916 const char* flags_file; |
0 | 2917 int index; |
2918 for (index = 0; index < args->nOptions; index++) { | |
2919 const JavaVMOption *option = args->options + index; | |
2920 if (match_option(option, "-XX:Flags=", &tail)) { | |
564 | 2921 flags_file = tail; |
0 | 2922 settings_file_specified = true; |
2923 } | |
2924 if (match_option(option, "-XX:+PrintVMOptions", &tail)) { | |
2925 PrintVMOptions = true; | |
2926 } | |
253
b0fe4deeb9fb
6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents:
196
diff
changeset
|
2927 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
|
2928 PrintVMOptions = false; |
b0fe4deeb9fb
6726999: nsk/stress/jck12a/jck12a010 assert(n != null,"Bad immediate dominator info.")
kvn
parents:
196
diff
changeset
|
2929 } |
564 | 2930 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions", &tail)) { |
2931 IgnoreUnrecognizedVMOptions = true; | |
2932 } | |
2933 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions", &tail)) { | |
2934 IgnoreUnrecognizedVMOptions = false; | |
2935 } | |
1150 | 2936 if (match_option(option, "-XX:+PrintFlagsInitial", &tail)) { |
2937 CommandLineFlags::printFlags(); | |
2938 vm_exit(0); | |
2939 } | |
1768
6ee479178066
6979444: add command line option to print command line flags descriptions
ikrylov
parents:
1745
diff
changeset
|
2940 |
6ee479178066
6979444: add command line option to print command line flags descriptions
ikrylov
parents:
1745
diff
changeset
|
2941 #ifndef PRODUCT |
6ee479178066
6979444: add command line option to print command line flags descriptions
ikrylov
parents:
1745
diff
changeset
|
2942 if (match_option(option, "-XX:+PrintFlagsWithComments", &tail)) { |
6ee479178066
6979444: add command line option to print command line flags descriptions
ikrylov
parents:
1745
diff
changeset
|
2943 CommandLineFlags::printFlags(true); |
6ee479178066
6979444: add command line option to print command line flags descriptions
ikrylov
parents:
1745
diff
changeset
|
2944 vm_exit(0); |
6ee479178066
6979444: add command line option to print command line flags descriptions
ikrylov
parents:
1745
diff
changeset
|
2945 } |
6ee479178066
6979444: add command line option to print command line flags descriptions
ikrylov
parents:
1745
diff
changeset
|
2946 #endif |
564 | 2947 } |
2948 | |
2949 if (IgnoreUnrecognizedVMOptions) { | |
2950 // uncast const to modify the flag args->ignoreUnrecognized | |
2951 *(jboolean*)(&args->ignoreUnrecognized) = true; | |
2952 } | |
2953 | |
2954 // Parse specified settings file | |
2955 if (settings_file_specified) { | |
2956 if (!process_settings_file(flags_file, true, args->ignoreUnrecognized)) { | |
2957 return JNI_EINVAL; | |
2958 } | |
0 | 2959 } |
2960 | |
2961 // Parse default .hotspotrc settings file | |
2962 if (!settings_file_specified) { | |
2963 if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) { | |
2964 return JNI_EINVAL; | |
2965 } | |
2966 } | |
2967 | |
2968 if (PrintVMOptions) { | |
2969 for (index = 0; index < args->nOptions; index++) { | |
2970 const JavaVMOption *option = args->options + index; | |
2971 if (match_option(option, "-XX:", &tail)) { | |
2972 logOption(tail); | |
2973 } | |
2974 } | |
2975 } | |
2976 | |
2977 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS | |
2978 jint result = parse_vm_init_args(args); | |
2979 if (result != JNI_OK) { | |
2980 return result; | |
2981 } | |
2982 | |
2983 #ifndef PRODUCT | |
2984 if (TraceBytecodesAt != 0) { | |
2985 TraceBytecodes = true; | |
2986 } | |
2987 if (CountCompiledCalls) { | |
2988 if (UseCounterDecay) { | |
2989 warning("UseCounterDecay disabled because CountCalls is set"); | |
2990 UseCounterDecay = false; | |
2991 } | |
2992 } | |
2993 #endif // PRODUCT | |
2994 | |
2416
38fea01eb669
6817525: turn on method handle functionality by default for JSR 292
twisti
parents:
2378
diff
changeset
|
2995 // Transitional |
38fea01eb669
6817525: turn on method handle functionality by default for JSR 292
twisti
parents:
2378
diff
changeset
|
2996 if (EnableMethodHandles || AnonymousClasses) { |
38fea01eb669
6817525: turn on method handle functionality by default for JSR 292
twisti
parents:
2378
diff
changeset
|
2997 if (!EnableInvokeDynamic && !FLAG_IS_DEFAULT(EnableInvokeDynamic)) { |
38fea01eb669
6817525: turn on method handle functionality by default for JSR 292
twisti
parents:
2378
diff
changeset
|
2998 warning("EnableMethodHandles and AnonymousClasses are obsolete. Keeping EnableInvokeDynamic disabled."); |
38fea01eb669
6817525: turn on method handle functionality by default for JSR 292
twisti
parents:
2378
diff
changeset
|
2999 } else { |
38fea01eb669
6817525: turn on method handle functionality by default for JSR 292
twisti
parents:
2378
diff
changeset
|
3000 EnableInvokeDynamic = true; |
726
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
712
diff
changeset
|
3001 } |
be93aad57795
6655646: dynamic languages need dynamically linked call sites
jrose
parents:
712
diff
changeset
|
3002 } |
2416
38fea01eb669
6817525: turn on method handle functionality by default for JSR 292
twisti
parents:
2378
diff
changeset
|
3003 |
38fea01eb669
6817525: turn on method handle functionality by default for JSR 292
twisti
parents:
2378
diff
changeset
|
3004 // JSR 292 is not supported before 1.7 |
38fea01eb669
6817525: turn on method handle functionality by default for JSR 292
twisti
parents:
2378
diff
changeset
|
3005 if (!JDK_Version::is_gte_jdk17x_version()) { |
38fea01eb669
6817525: turn on method handle functionality by default for JSR 292
twisti
parents:
2378
diff
changeset
|
3006 if (EnableInvokeDynamic) { |
38fea01eb669
6817525: turn on method handle functionality by default for JSR 292
twisti
parents:
2378
diff
changeset
|
3007 if (!FLAG_IS_DEFAULT(EnableInvokeDynamic)) { |
38fea01eb669
6817525: turn on method handle functionality by default for JSR 292
twisti
parents:
2378
diff
changeset
|
3008 warning("JSR 292 is not supported before 1.7. Disabling support."); |
38fea01eb669
6817525: turn on method handle functionality by default for JSR 292
twisti
parents:
2378
diff
changeset
|
3009 } |
38fea01eb669
6817525: turn on method handle functionality by default for JSR 292
twisti
parents:
2378
diff
changeset
|
3010 EnableInvokeDynamic = false; |
710 | 3011 } |
3012 } | |
2416
38fea01eb669
6817525: turn on method handle functionality by default for JSR 292
twisti
parents:
2378
diff
changeset
|
3013 |
38fea01eb669
6817525: turn on method handle functionality by default for JSR 292
twisti
parents:
2378
diff
changeset
|
3014 if (EnableInvokeDynamic && ScavengeRootsInCode == 0) { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
3015 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) { |
2416
38fea01eb669
6817525: turn on method handle functionality by default for JSR 292
twisti
parents:
2378
diff
changeset
|
3016 warning("forcing ScavengeRootsInCode non-zero because EnableInvokeDynamic is true"); |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
3017 } |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
3018 ScavengeRootsInCode = 1; |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
932
diff
changeset
|
3019 } |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2370
diff
changeset
|
3020 if (!JavaObjectsInPerm && ScavengeRootsInCode == 0) { |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2370
diff
changeset
|
3021 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) { |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2370
diff
changeset
|
3022 warning("forcing ScavengeRootsInCode non-zero because JavaObjectsInPerm is false"); |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2370
diff
changeset
|
3023 } |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2370
diff
changeset
|
3024 ScavengeRootsInCode = 1; |
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2370
diff
changeset
|
3025 } |
710 | 3026 |
0 | 3027 if (PrintGCDetails) { |
3028 // Turn on -verbose:gc options as well | |
3029 PrintGC = true; | |
3030 } | |
3031 | |
1571
2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents:
1506
diff
changeset
|
3032 // 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
|
3033 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
|
3034 |
0 | 3035 #ifdef SERIALGC |
1064 | 3036 force_serial_gc(); |
0 | 3037 #endif // SERIALGC |
3038 #ifdef KERNEL | |
3039 no_shared_spaces(); | |
3040 #endif // KERNEL | |
3041 | |
3042 // Set flags based on ergonomics. | |
3043 set_ergonomics_flags(); | |
3044 | |
2362
a2c2eac1ca62
7018056: large pages not always enabled by default
jcoomes
parents:
2302
diff
changeset
|
3045 set_shared_spaces_flags(); |
1135
e66fd840cb6b
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
1131
diff
changeset
|
3046 |
10
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
3047 // Check the GC selections again. |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
3048 if (!check_gc_consistency()) { |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
3049 return JNI_EINVAL; |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
3050 } |
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
3051 |
1783 | 3052 if (TieredCompilation) { |
3053 set_tiered_flags(); | |
3054 } else { | |
3055 // Check if the policy is valid. Policies 0 and 1 are valid for non-tiered setup. | |
3056 if (CompilationPolicyChoice >= 2) { | |
3057 vm_exit_during_initialization( | |
3058 "Incompatible compilation policy selected", NULL); | |
3059 } | |
3060 } | |
3061 | |
1145
e018e6884bd8
6631166: CMS: better heuristics when combatting fragmentation
ysr
parents:
1074
diff
changeset
|
3062 #ifndef KERNEL |
2368
dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
ysr
parents:
2366
diff
changeset
|
3063 // Set heap size based on available physical memory |
dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
ysr
parents:
2366
diff
changeset
|
3064 set_heap_size(); |
dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
ysr
parents:
2366
diff
changeset
|
3065 // Set per-collector flags |
dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
ysr
parents:
2366
diff
changeset
|
3066 if (UseParallelGC || UseParallelOldGC) { |
dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
ysr
parents:
2366
diff
changeset
|
3067 set_parallel_gc_flags(); |
dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
ysr
parents:
2366
diff
changeset
|
3068 } else if (UseConcMarkSweepGC) { // should be done before ParNew check below |
10
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
3069 set_cms_and_parnew_gc_flags(); |
2368
dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
ysr
parents:
2366
diff
changeset
|
3070 } else if (UseParNewGC) { // skipped if CMS is set above |
dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
ysr
parents:
2366
diff
changeset
|
3071 set_parnew_gc_flags(); |
dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
ysr
parents:
2366
diff
changeset
|
3072 } else if (UseG1GC) { |
dde920245681
6896099: Integrate CMS heap ergo with default heap sizing ergo
ysr
parents:
2366
diff
changeset
|
3073 set_g1_gc_flags(); |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
135
diff
changeset
|
3074 } |
1145
e018e6884bd8
6631166: CMS: better heuristics when combatting fragmentation
ysr
parents:
1074
diff
changeset
|
3075 #endif // KERNEL |
10
28372612af5e
6362677: Change parallel GC collector default number of parallel GC threads.
jmasa
parents:
0
diff
changeset
|
3076 |
0 | 3077 #ifdef SERIALGC |
3078 assert(verify_serial_gc_flags(), "SerialGC unset"); | |
3079 #endif // SERIALGC | |
3080 | |
3081 // Set bytecode rewriting flags | |
3082 set_bytecode_flags(); | |
3083 | |
3084 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled. | |
3085 set_aggressive_opts_flags(); | |
3086 | |
2239
c08677f98289
6840152: JVM crashes when heavyweight monitors are used
coleenp
parents:
2176
diff
changeset
|
3087 // Turn off biased locking for locking debug mode flags, |
c08677f98289
6840152: JVM crashes when heavyweight monitors are used
coleenp
parents:
2176
diff
changeset
|
3088 // 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
|
3089 // biased locking. |
2331 | 3090 if (UseHeavyMonitors |
3091 #ifdef COMPILER1 | |
3092 || !UseFastLocking | |
3093 #endif // COMPILER1 | |
3094 ) { | |
2239
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3095 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) { |
c08677f98289
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changeset
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3096 // flag set to true on command line; warn the user that they |
c08677f98289
6840152: JVM crashes when heavyweight monitors are used
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|
3097 // can't enable biased locking here |
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|
3098 warning("Biased Locking is not supported with locking debug flags" |
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|
3099 "; ignoring UseBiasedLocking flag." ); |
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|
3100 } |
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6840152: JVM crashes when heavyweight monitors are used
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|
3101 UseBiasedLocking = false; |
c08677f98289
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|
3102 } |
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|
3103 |
0 | 3104 #ifdef CC_INTERP |
1131 | 3105 // Clear flags not supported by the C++ interpreter |
3106 FLAG_SET_DEFAULT(ProfileInterpreter, false); | |
0 | 3107 FLAG_SET_DEFAULT(UseBiasedLocking, false); |
1131 | 3108 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false)); |
3109 #endif // CC_INTERP | |
3110 | |
420
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
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diff
changeset
|
3111 #ifdef COMPILER2 |
a1980da045cc
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diff
changeset
|
3112 if (!UseBiasedLocking || EmitSync != 0) { |
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
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diff
changeset
|
3113 UseOptoBiasInlining = false; |
a1980da045cc
6462850: generate biased locking code in C2 ideal graph
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parents:
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diff
changeset
|
3114 } |
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6462850: generate biased locking code in C2 ideal graph
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diff
changeset
|
3115 #endif |
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changeset
|
3116 |
1155
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6912062: disassembler plugin needs to produce symbolic information in product mode
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|
3117 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) { |
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6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
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|
3118 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output"); |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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changeset
|
3119 DebugNonSafepoints = true; |
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6912062: disassembler plugin needs to produce symbolic information in product mode
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diff
changeset
|
3120 } |
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diff
changeset
|
3121 |
1188
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
kvn
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|
3122 #ifndef PRODUCT |
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|
3123 if (CompileTheWorld) { |
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
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|
3124 // Force NmethodSweeper to sweep whole CodeCache each time. |
99af867dfa05
6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
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changeset
|
3125 if (FLAG_IS_DEFAULT(NmethodSweepFraction)) { |
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6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
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changeset
|
3126 NmethodSweepFraction = 1; |
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6919886: Sweep CodeCache more aggressively to reduce its usage for CompileTheWorld
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|
3127 } |
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|
3128 } |
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|
3129 #endif |
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|
3130 |
0 | 3131 if (PrintCommandLineFlags) { |
3132 CommandLineFlags::printSetFlags(); | |
3133 } | |
3134 | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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|
3135 // Apply CPU specific policy for the BiasedLocking |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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|
3136 if (UseBiasedLocking) { |
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changeset
|
3137 if (!VM_Version::use_biased_locking() && |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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changeset
|
3138 !(FLAG_IS_CMDLINE(UseBiasedLocking))) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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|
3139 UseBiasedLocking = false; |
126ea7725993
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|
3140 } |
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6953477: Increase portability and flexibility of building Hotspot
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changeset
|
3141 } |
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6953477: Increase portability and flexibility of building Hotspot
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changeset
|
3142 |
2302
da091bb67459
7022037: Pause when exiting if debugger is attached on windows
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diff
changeset
|
3143 // set PauseAtExit if the gamma launcher was used and a debugger is attached |
da091bb67459
7022037: Pause when exiting if debugger is attached on windows
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|
3144 // but only if not already set on the commandline |
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7022037: Pause when exiting if debugger is attached on windows
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|
3145 if (Arguments::created_by_gamma_launcher() && os::is_debugger_attached()) { |
da091bb67459
7022037: Pause when exiting if debugger is attached on windows
sla
parents:
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diff
changeset
|
3146 bool set = false; |
da091bb67459
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diff
changeset
|
3147 CommandLineFlags::wasSetOnCmdline("PauseAtExit", &set); |
da091bb67459
7022037: Pause when exiting if debugger is attached on windows
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diff
changeset
|
3148 if (!set) { |
da091bb67459
7022037: Pause when exiting if debugger is attached on windows
sla
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diff
changeset
|
3149 FLAG_SET_DEFAULT(PauseAtExit, true); |
da091bb67459
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parents:
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diff
changeset
|
3150 } |
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changeset
|
3151 } |
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|
3152 |
0 | 3153 return JNI_OK; |
3154 } | |
3155 | |
3156 int Arguments::PropertyList_count(SystemProperty* pl) { | |
3157 int count = 0; | |
3158 while(pl != NULL) { | |
3159 count++; | |
3160 pl = pl->next(); | |
3161 } | |
3162 return count; | |
3163 } | |
3164 | |
3165 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) { | |
3166 assert(key != NULL, "just checking"); | |
3167 SystemProperty* prop; | |
3168 for (prop = pl; prop != NULL; prop = prop->next()) { | |
3169 if (strcmp(key, prop->key()) == 0) return prop->value(); | |
3170 } | |
3171 return NULL; | |
3172 } | |
3173 | |
3174 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) { | |
3175 int count = 0; | |
3176 const char* ret_val = NULL; | |
3177 | |
3178 while(pl != NULL) { | |
3179 if(count >= index) { | |
3180 ret_val = pl->key(); | |
3181 break; | |
3182 } | |
3183 count++; | |
3184 pl = pl->next(); | |
3185 } | |
3186 | |
3187 return ret_val; | |
3188 } | |
3189 | |
3190 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) { | |
3191 int count = 0; | |
3192 char* ret_val = NULL; | |
3193 | |
3194 while(pl != NULL) { | |
3195 if(count >= index) { | |
3196 ret_val = pl->value(); | |
3197 break; | |
3198 } | |
3199 count++; | |
3200 pl = pl->next(); | |
3201 } | |
3202 | |
3203 return ret_val; | |
3204 } | |
3205 | |
3206 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) { | |
3207 SystemProperty* p = *plist; | |
3208 if (p == NULL) { | |
3209 *plist = new_p; | |
3210 } else { | |
3211 while (p->next() != NULL) { | |
3212 p = p->next(); | |
3213 } | |
3214 p->set_next(new_p); | |
3215 } | |
3216 } | |
3217 | |
3218 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, char* v) { | |
3219 if (plist == NULL) | |
3220 return; | |
3221 | |
3222 SystemProperty* new_p = new SystemProperty(k, v, true); | |
3223 PropertyList_add(plist, new_p); | |
3224 } | |
3225 | |
3226 // This add maintains unique property key in the list. | |
691 | 3227 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, char* v, jboolean append) { |
0 | 3228 if (plist == NULL) |
3229 return; | |
3230 | |
3231 // If property key exist then update with new value. | |
3232 SystemProperty* prop; | |
3233 for (prop = *plist; prop != NULL; prop = prop->next()) { | |
3234 if (strcmp(k, prop->key()) == 0) { | |
691 | 3235 if (append) { |
3236 prop->append_value(v); | |
3237 } else { | |
3238 prop->set_value(v); | |
3239 } | |
0 | 3240 return; |
3241 } | |
3242 } | |
3243 | |
3244 PropertyList_add(plist, k, v); | |
3245 } | |
3246 | |
3247 #ifdef KERNEL | |
3248 char *Arguments::get_kernel_properties() { | |
3249 // Find properties starting with kernel and append them to string | |
3250 // We need to find out how long they are first because the URL's that they | |
3251 // might point to could get long. | |
3252 int length = 0; | |
3253 SystemProperty* prop; | |
3254 for (prop = _system_properties; prop != NULL; prop = prop->next()) { | |
3255 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { | |
3256 length += (strlen(prop->key()) + strlen(prop->value()) + 5); // "-D =" | |
3257 } | |
3258 } | |
3259 // Add one for null terminator. | |
3260 char *props = AllocateHeap(length + 1, "get_kernel_properties"); | |
3261 if (length != 0) { | |
3262 int pos = 0; | |
3263 for (prop = _system_properties; prop != NULL; prop = prop->next()) { | |
3264 if (strncmp(prop->key(), "kernel.", 7 ) == 0) { | |
3265 jio_snprintf(&props[pos], length-pos, | |
3266 "-D%s=%s ", prop->key(), prop->value()); | |
3267 pos = strlen(props); | |
3268 } | |
3269 } | |
3270 } | |
3271 // null terminate props in case of null | |
3272 props[length] = '\0'; | |
3273 return props; | |
3274 } | |
3275 #endif // KERNEL | |
3276 | |
3277 // Copies src into buf, replacing "%%" with "%" and "%p" with pid | |
3278 // Returns true if all of the source pointed by src has been copied over to | |
3279 // the destination buffer pointed by buf. Otherwise, returns false. | |
3280 // Notes: | |
3281 // 1. If the length (buflen) of the destination buffer excluding the | |
3282 // NULL terminator character is not long enough for holding the expanded | |
3283 // pid characters, it also returns false instead of returning the partially | |
3284 // expanded one. | |
3285 // 2. The passed in "buflen" should be large enough to hold the null terminator. | |
3286 bool Arguments::copy_expand_pid(const char* src, size_t srclen, | |
3287 char* buf, size_t buflen) { | |
3288 const char* p = src; | |
3289 char* b = buf; | |
3290 const char* src_end = &src[srclen]; | |
3291 char* buf_end = &buf[buflen - 1]; | |
3292 | |
3293 while (p < src_end && b < buf_end) { | |
3294 if (*p == '%') { | |
3295 switch (*(++p)) { | |
3296 case '%': // "%%" ==> "%" | |
3297 *b++ = *p++; | |
3298 break; | |
3299 case 'p': { // "%p" ==> current process id | |
3300 // buf_end points to the character before the last character so | |
3301 // that we could write '\0' to the end of the buffer. | |
3302 size_t buf_sz = buf_end - b + 1; | |
3303 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id()); | |
3304 | |
3305 // if jio_snprintf fails or the buffer is not long enough to hold | |
3306 // the expanded pid, returns false. | |
3307 if (ret < 0 || ret >= (int)buf_sz) { | |
3308 return false; | |
3309 } else { | |
3310 b += ret; | |
3311 assert(*b == '\0', "fail in copy_expand_pid"); | |
3312 if (p == src_end && b == buf_end + 1) { | |
3313 // reach the end of the buffer. | |
3314 return true; | |
3315 } | |
3316 } | |
3317 p++; | |
3318 break; | |
3319 } | |
3320 default : | |
3321 *b++ = '%'; | |
3322 } | |
3323 } else { | |
3324 *b++ = *p++; | |
3325 } | |
3326 } | |
3327 *b = '\0'; | |
3328 return (p == src_end); // return false if not all of the source was copied | |
3329 } |