1 /*
2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classLoader.hpp"
27 #include "classfile/javaAssertions.hpp"
28 #include "classfile/stringTable.hpp"
29 #include "classfile/symbolTable.hpp"
30 #include "code/codeCacheExtensions.hpp"
31 #include "gc/shared/cardTableRS.hpp"
32 #include "gc/shared/genCollectedHeap.hpp"
33 #include "gc/shared/referenceProcessor.hpp"
34 #include "gc/shared/taskqueue.hpp"
35 #include "logging/logConfiguration.hpp"
36 #include "memory/allocation.inline.hpp"
37 #include "memory/universe.inline.hpp"
38 #include "oops/oop.inline.hpp"
39 #include "prims/jvmtiExport.hpp"
40 #include "runtime/arguments.hpp"
41 #include "runtime/arguments_ext.hpp"
42 #include "runtime/commandLineFlagConstraintList.hpp"
43 #include "runtime/commandLineFlagRangeList.hpp"
44 #include "runtime/globals.hpp"
45 #include "runtime/globals_extension.hpp"
46 #include "runtime/java.hpp"
47 #include "runtime/os.hpp"
48 #include "runtime/vm_version.hpp"
49 #include "services/management.hpp"
50 #include "services/memTracker.hpp"
51 #include "utilities/defaultStream.hpp"
52 #include "utilities/macros.hpp"
53 #include "utilities/stringUtils.hpp"
54 #if INCLUDE_JVMCI
55 #include "jvmci/jvmciRuntime.hpp"
56 #endif
57 #if INCLUDE_ALL_GCS
58 #include "gc/cms/compactibleFreeListSpace.hpp"
59 #include "gc/g1/g1CollectedHeap.inline.hpp"
60 #include "gc/parallel/parallelScavengeHeap.hpp"
61 #endif // INCLUDE_ALL_GCS
62
63 // Note: This is a special bug reporting site for the JVM
64 #define DEFAULT_VENDOR_URL_BUG "http://bugreport.java.com/bugreport/crash.jsp"
65 #define DEFAULT_JAVA_LAUNCHER "generic"
66
67 #define UNSUPPORTED_GC_OPTION(gc) \
68 do { \
69 if (gc) { \
70 if (FLAG_IS_CMDLINE(gc)) { \
71 warning(#gc " is not supported in this VM. Using Serial GC."); \
72 } \
73 FLAG_SET_DEFAULT(gc, false); \
74 } \
75 } while(0)
76
77 char** Arguments::_jvm_flags_array = NULL;
78 int Arguments::_num_jvm_flags = 0;
79 char** Arguments::_jvm_args_array = NULL;
80 int Arguments::_num_jvm_args = 0;
81 char* Arguments::_java_command = NULL;
82 SystemProperty* Arguments::_system_properties = NULL;
83 const char* Arguments::_gc_log_filename = NULL;
84 bool Arguments::_has_profile = false;
85 size_t Arguments::_conservative_max_heap_alignment = 0;
86 size_t Arguments::_min_heap_size = 0;
87 Arguments::Mode Arguments::_mode = _mixed;
88 bool Arguments::_java_compiler = false;
89 bool Arguments::_xdebug_mode = false;
90 const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG;
91 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER;
92 int Arguments::_sun_java_launcher_pid = -1;
93 bool Arguments::_sun_java_launcher_is_altjvm = false;
94
95 // These parameters are reset in method parse_vm_init_args()
96 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
97 bool Arguments::_UseOnStackReplacement = UseOnStackReplacement;
98 bool Arguments::_BackgroundCompilation = BackgroundCompilation;
99 bool Arguments::_ClipInlining = ClipInlining;
100 intx Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
101 intx Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
102
103 char* Arguments::SharedArchivePath = NULL;
104
105 AgentLibraryList Arguments::_libraryList;
106 AgentLibraryList Arguments::_agentList;
107
108 abort_hook_t Arguments::_abort_hook = NULL;
109 exit_hook_t Arguments::_exit_hook = NULL;
110 vfprintf_hook_t Arguments::_vfprintf_hook = NULL;
111
112
113 SystemProperty *Arguments::_sun_boot_library_path = NULL;
114 SystemProperty *Arguments::_java_library_path = NULL;
115 SystemProperty *Arguments::_java_home = NULL;
116 SystemProperty *Arguments::_java_class_path = NULL;
117 SystemProperty *Arguments::_sun_boot_class_path = NULL;
118
119 char* Arguments::_ext_dirs = NULL;
120
121 // Check if head of 'option' matches 'name', and sets 'tail' to the remaining
122 // part of the option string.
123 static bool match_option(const JavaVMOption *option, const char* name,
124 const char** tail) {
125 size_t len = strlen(name);
126 if (strncmp(option->optionString, name, len) == 0) {
127 *tail = option->optionString + len;
128 return true;
129 } else {
130 return false;
131 }
132 }
133
134 // Check if 'option' matches 'name'. No "tail" is allowed.
135 static bool match_option(const JavaVMOption *option, const char* name) {
136 const char* tail = NULL;
137 bool result = match_option(option, name, &tail);
138 if (tail != NULL && *tail == '\0') {
139 return result;
140 } else {
141 return false;
142 }
143 }
144
145 // Return true if any of the strings in null-terminated array 'names' matches.
146 // If tail_allowed is true, then the tail must begin with a colon; otherwise,
147 // the option must match exactly.
148 static bool match_option(const JavaVMOption* option, const char** names, const char** tail,
149 bool tail_allowed) {
150 for (/* empty */; *names != NULL; ++names) {
151 if (match_option(option, *names, tail)) {
152 if (**tail == '\0' || tail_allowed && **tail == ':') {
153 return true;
154 }
155 }
156 }
157 return false;
158 }
159
160 static void logOption(const char* opt) {
161 if (PrintVMOptions) {
162 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt);
163 }
164 }
165
166 // Process java launcher properties.
167 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) {
168 // See if sun.java.launcher, sun.java.launcher.is_altjvm or
169 // sun.java.launcher.pid is defined.
170 // Must do this before setting up other system properties,
171 // as some of them may depend on launcher type.
172 for (int index = 0; index < args->nOptions; index++) {
173 const JavaVMOption* option = args->options + index;
174 const char* tail;
175
176 if (match_option(option, "-Dsun.java.launcher=", &tail)) {
177 process_java_launcher_argument(tail, option->extraInfo);
178 continue;
179 }
180 if (match_option(option, "-Dsun.java.launcher.is_altjvm=", &tail)) {
181 if (strcmp(tail, "true") == 0) {
182 _sun_java_launcher_is_altjvm = true;
183 }
184 continue;
185 }
186 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) {
187 _sun_java_launcher_pid = atoi(tail);
188 continue;
189 }
190 }
191 }
192
193 // Initialize system properties key and value.
194 void Arguments::init_system_properties() {
195 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name",
196 "Java Virtual Machine Specification", false));
197 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false));
198 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false));
199 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true));
200
201 // Following are JVMTI agent writable properties.
202 // Properties values are set to NULL and they are
203 // os specific they are initialized in os::init_system_properties_values().
204 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true);
205 _java_library_path = new SystemProperty("java.library.path", NULL, true);
206 _java_home = new SystemProperty("java.home", NULL, true);
207 _sun_boot_class_path = new SystemProperty("sun.boot.class.path", NULL, true);
208
209 _java_class_path = new SystemProperty("java.class.path", "", true);
210
211 // Add to System Property list.
212 PropertyList_add(&_system_properties, _sun_boot_library_path);
213 PropertyList_add(&_system_properties, _java_library_path);
214 PropertyList_add(&_system_properties, _java_home);
215 PropertyList_add(&_system_properties, _java_class_path);
216 PropertyList_add(&_system_properties, _sun_boot_class_path);
217
218 // Set OS specific system properties values
219 os::init_system_properties_values();
220
221 JVMCI_ONLY(JVMCIRuntime::init_system_properties(&_system_properties);)
222 }
223
224 // Update/Initialize System properties after JDK version number is known
225 void Arguments::init_version_specific_system_properties() {
226 enum { bufsz = 16 };
227 char buffer[bufsz];
228 const char* spec_vendor = "Oracle Corporation";
229 uint32_t spec_version = JDK_Version::current().major_version();
230
231 jio_snprintf(buffer, bufsz, "1." UINT32_FORMAT, spec_version);
232
233 PropertyList_add(&_system_properties,
234 new SystemProperty("java.vm.specification.vendor", spec_vendor, false));
235 PropertyList_add(&_system_properties,
236 new SystemProperty("java.vm.specification.version", buffer, false));
237 PropertyList_add(&_system_properties,
238 new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false));
239 }
240
241 /*
242 * -XX argument processing:
243 *
244 * -XX arguments are defined in several places, such as:
245 * globals.hpp, globals_<cpu>.hpp, globals_<os>.hpp, <compiler>_globals.hpp, or <gc>_globals.hpp.
246 * -XX arguments are parsed in parse_argument().
247 * -XX argument bounds checking is done in check_vm_args_consistency().
248 *
249 * Over time -XX arguments may change. There are mechanisms to handle common cases:
250 *
251 * ALIASED: An option that is simply another name for another option. This is often
252 * part of the process of deprecating a flag, but not all aliases need
253 * to be deprecated.
254 *
255 * Create an alias for an option by adding the old and new option names to the
256 * "aliased_jvm_flags" table. Delete the old variable from globals.hpp (etc).
257 *
258 * DEPRECATED: An option that is supported, but a warning is printed to let the user know that
259 * support may be removed in the future. Both regular and aliased options may be
260 * deprecated.
261 *
262 * Add a deprecation warning for an option (or alias) by adding an entry in the
263 * "special_jvm_flags" table and setting the "deprecated_in" field.
264 * Often an option "deprecated" in one major release will
265 * be made "obsolete" in the next. In this case the entry should also have it's
266 * "obsolete_in" field set.
267 *
268 * OBSOLETE: An option that has been removed (and deleted from globals.hpp), but is still accepted
269 * on the command line. A warning is printed to let the user know that option might not
270 * be accepted in the future.
271 *
272 * Add an obsolete warning for an option by adding an entry in the "special_jvm_flags"
273 * table and setting the "obsolete_in" field.
274 *
275 * EXPIRED: A deprecated or obsolete option that has an "accept_until" version less than or equal
276 * to the current JDK version. The system will flatly refuse to admit the existence of
277 * the flag. This allows a flag to die automatically over JDK releases.
278 *
279 * Note that manual cleanup of expired options should be done at major JDK version upgrades:
280 * - Newly expired options should be removed from the special_jvm_flags and aliased_jvm_flags tables.
281 * - Newly obsolete or expired deprecated options should have their global variable
282 * definitions removed (from globals.hpp, etc) and related implementations removed.
283 *
284 * Recommended approach for removing options:
285 *
286 * To remove options commonly used by customers (e.g. product, commercial -XX options), use
287 * the 3-step model adding major release numbers to the deprecate, obsolete and expire columns.
288 *
289 * To remove internal options (e.g. diagnostic, experimental, develop options), use
290 * a 2-step model adding major release numbers to the obsolete and expire columns.
291 *
292 * To change the name of an option, use the alias table as well as a 2-step
293 * model adding major release numbers to the deprecate and expire columns.
294 * Think twice about aliasing commonly used customer options.
295 *
296 * There are times when it is appropriate to leave a future release number as undefined.
297 *
298 * Tests: Aliases should be tested in VMAliasOptions.java.
299 * Deprecated options should be tested in VMDeprecatedOptions.java.
300 */
301
302 // Obsolete or deprecated -XX flag.
303 typedef struct {
304 const char* name;
305 JDK_Version deprecated_in; // When the deprecation warning started (or "undefined").
306 JDK_Version obsolete_in; // When the obsolete warning started (or "undefined").
307 JDK_Version expired_in; // When the option expires (or "undefined").
308 } SpecialFlag;
309
310 // The special_jvm_flags table declares options that are being deprecated and/or obsoleted. The
311 // "deprecated_in" or "obsolete_in" fields may be set to "undefined", but not both.
312 // When the JDK version reaches 'deprecated_in' limit, the JVM will process this flag on
313 // the command-line as usual, but will issue a warning.
314 // When the JDK version reaches 'obsolete_in' limit, the JVM will continue accepting this flag on
315 // the command-line, while issuing a warning and ignoring the flag value.
316 // Once the JDK version reaches 'expired_in' limit, the JVM will flatly refuse to admit the
317 // existence of the flag.
318 //
319 // MANUAL CLEANUP ON JDK VERSION UPDATES:
320 // This table ensures that the handling of options will update automatically when the JDK
321 // version is incremented, but the source code needs to be cleanup up manually:
322 // - As "deprecated" options age into "obsolete" or "expired" options, the associated "globals"
323 // variable should be removed, as well as users of the variable.
324 // - As "deprecated" options age into "obsolete" options, move the entry into the
325 // "Obsolete Flags" section of the table.
326 // - All expired options should be removed from the table.
327 static SpecialFlag const special_jvm_flags[] = {
328 // -------------- Deprecated Flags --------------
329 // --- Non-alias flags - sorted by obsolete_in then expired_in:
330 { "MaxGCMinorPauseMillis", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() },
331 { "UseParNewGC", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) },
332
333 // --- Deprecated alias flags (see also aliased_jvm_flags) - sorted by obsolete_in then expired_in:
334 { "DefaultMaxRAMFraction", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() },
335 { "CreateMinidumpOnCrash", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
336 { "CMSMarkStackSizeMax", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) },
337 { "CMSMarkStackSize", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) },
338 { "G1MarkStackSize", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) },
339 { "ParallelMarkingThreads", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) },
340 { "ParallelCMSThreads", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) },
341
342 // -------------- Obsolete Flags - sorted by expired_in --------------
343 { "UseOldInlining", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
344 { "SafepointPollOffset", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
345 { "UseBoundThreads", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
346 { "DefaultThreadPriority", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
347 { "NoYieldsInMicrolock", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
348 { "BackEdgeThreshold", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
349 { "UseNewReflection", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
350 { "ReflectionWrapResolutionErrors",JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
351 { "VerifyReflectionBytecodes", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
352 { "AutoShutdownNMT", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
353 { "NmethodSweepFraction", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
354 { "NmethodSweepCheckInterval", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
355 { "CodeCacheMinimumFreeSpace", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
356 #ifndef ZERO
357 { "UseFastAccessorMethods", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
358 { "UseFastEmptyMethods", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
359 #endif // ZERO
360 { "UseCompilerSafepoints", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
361 { "AdaptiveSizePausePolicy", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
362 { "ParallelGCRetainPLAB", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
363 { "ThreadSafetyMargin", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
364 { "LazyBootClassLoader", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
365 { "StarvationMonitorInterval", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
366 { "PreInflateSpin", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
367
368 #ifdef TEST_VERIFY_SPECIAL_JVM_FLAGS
369 { "dep > obs", JDK_Version::jdk(9), JDK_Version::jdk(8), JDK_Version::undefined() },
370 { "dep > exp ", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(8) },
371 { "obs > exp ", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(8) },
372 { "not deprecated or obsolete", JDK_Version::undefined(), JDK_Version::undefined(), JDK_Version::jdk(9) },
373 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
374 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
375 { "BytecodeVerificationRemote", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::undefined() },
376 #endif
377
378 { NULL, JDK_Version(0), JDK_Version(0) }
379 };
380
381 // Flags that are aliases for other flags.
382 typedef struct {
383 const char* alias_name;
384 const char* real_name;
385 } AliasedFlag;
386
387 static AliasedFlag const aliased_jvm_flags[] = {
388 { "DefaultMaxRAMFraction", "MaxRAMFraction" },
389 { "CMSMarkStackSizeMax", "MarkStackSizeMax" },
390 { "CMSMarkStackSize", "MarkStackSize" },
391 { "G1MarkStackSize", "MarkStackSize" },
392 { "ParallelMarkingThreads", "ConcGCThreads" },
393 { "ParallelCMSThreads", "ConcGCThreads" },
394 { "CreateMinidumpOnCrash", "CreateCoredumpOnCrash" },
395 { NULL, NULL}
396 };
397
398 // Return true if "v" is less than "other", where "other" may be "undefined".
399 static bool version_less_than(JDK_Version v, JDK_Version other) {
400 assert(!v.is_undefined(), "must be defined");
401 if (!other.is_undefined() && v.compare(other) >= 0) {
402 return false;
403 } else {
404 return true;
405 }
406 }
407
408 static bool lookup_special_flag(const char *flag_name, SpecialFlag& flag) {
409 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
410 if ((strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
411 flag = special_jvm_flags[i];
412 return true;
413 }
414 }
415 return false;
416 }
417
418 bool Arguments::is_obsolete_flag(const char *flag_name, JDK_Version* version) {
419 assert(version != NULL, "Must provide a version buffer");
420 SpecialFlag flag;
421 if (lookup_special_flag(flag_name, flag)) {
422 if (!flag.obsolete_in.is_undefined()) {
423 if (version_less_than(JDK_Version::current(), flag.expired_in)) {
424 *version = flag.obsolete_in;
425 return true;
426 }
427 }
428 }
429 return false;
430 }
431
432 int Arguments::is_deprecated_flag(const char *flag_name, JDK_Version* version) {
433 assert(version != NULL, "Must provide a version buffer");
434 SpecialFlag flag;
435 if (lookup_special_flag(flag_name, flag)) {
436 if (!flag.deprecated_in.is_undefined()) {
437 if (version_less_than(JDK_Version::current(), flag.obsolete_in) &&
438 version_less_than(JDK_Version::current(), flag.expired_in)) {
439 *version = flag.deprecated_in;
440 return 1;
441 } else {
442 return -1;
443 }
444 }
445 }
446 return 0;
447 }
448
449 const char* Arguments::real_flag_name(const char *flag_name) {
450 for (size_t i = 0; aliased_jvm_flags[i].alias_name != NULL; i++) {
451 const AliasedFlag& flag_status = aliased_jvm_flags[i];
452 if (strcmp(flag_status.alias_name, flag_name) == 0) {
453 return flag_status.real_name;
454 }
455 }
456 return flag_name;
457 }
458
459 #ifndef PRODUCT
460 static bool lookup_special_flag(const char *flag_name, size_t skip_index) {
461 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
462 if ((i != skip_index) && (strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
463 return true;
464 }
465 }
466 return false;
467 }
468
469 static bool verify_special_jvm_flags() {
470 bool success = true;
471 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
472 const SpecialFlag& flag = special_jvm_flags[i];
473 if (lookup_special_flag(flag.name, i)) {
474 warning("Duplicate special flag declaration \"%s\"", flag.name);
475 success = false;
476 }
477 if (flag.deprecated_in.is_undefined() &&
478 flag.obsolete_in.is_undefined()) {
479 warning("Special flag entry \"%s\" must declare version deprecated and/or obsoleted in.", flag.name);
480 success = false;
481 }
482
483 if (!flag.deprecated_in.is_undefined()) {
484 if (!version_less_than(flag.deprecated_in, flag.obsolete_in)) {
485 warning("Special flag entry \"%s\" must be deprecated before obsoleted.", flag.name);
486 success = false;
487 }
488
489 if (!version_less_than(flag.deprecated_in, flag.expired_in)) {
490 warning("Special flag entry \"%s\" must be deprecated before expired.", flag.name);
491 success = false;
492 }
493 }
494
495 if (!flag.obsolete_in.is_undefined()) {
496 if (!version_less_than(flag.obsolete_in, flag.expired_in)) {
497 warning("Special flag entry \"%s\" must be obsoleted before expired.", flag.name);
498 success = false;
499 }
500
501 // if flag has become obsolete it should not have a "globals" flag defined anymore.
502 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) {
503 if (Flag::find_flag(flag.name) != NULL) {
504 warning("Global variable for obsolete special flag entry \"%s\" should be removed", flag.name);
505 success = false;
506 }
507 }
508 }
509
510 if (!flag.expired_in.is_undefined()) {
511 // if flag has become expired it should not have a "globals" flag defined anymore.
512 if (!version_less_than(JDK_Version::current(), flag.expired_in)) {
513 if (Flag::find_flag(flag.name) != NULL) {
514 warning("Global variable for expired flag entry \"%s\" should be removed", flag.name);
515 success = false;
516 }
517 }
518 }
519
520 }
521 return success;
522 }
523 #endif
524
525 // Constructs the system class path (aka boot class path) from the following
526 // components, in order:
527 //
528 // prefix // from -Xbootclasspath/p:...
529 // base // from os::get_system_properties() or -Xbootclasspath=
530 // suffix // from -Xbootclasspath/a:...
531 //
532 // This could be AllStatic, but it isn't needed after argument processing is
533 // complete.
534 class SysClassPath: public StackObj {
535 public:
536 SysClassPath(const char* base);
537 ~SysClassPath();
538
539 inline void set_base(const char* base);
540 inline void add_prefix(const char* prefix);
541 inline void add_suffix_to_prefix(const char* suffix);
542 inline void add_suffix(const char* suffix);
543 inline void reset_path(const char* base);
544
545 inline const char* get_base() const { return _items[_scp_base]; }
546 inline const char* get_prefix() const { return _items[_scp_prefix]; }
547 inline const char* get_suffix() const { return _items[_scp_suffix]; }
548
549 // Combine all the components into a single c-heap-allocated string; caller
550 // must free the string if/when no longer needed.
551 char* combined_path();
552
553 private:
554 // Utility routines.
555 static char* add_to_path(const char* path, const char* str, bool prepend);
556 static char* add_jars_to_path(char* path, const char* directory);
557
558 inline void reset_item_at(int index);
559
560 // Array indices for the items that make up the sysclasspath. All except the
561 // base are allocated in the C heap and freed by this class.
562 enum {
563 _scp_prefix, // from -Xbootclasspath/p:...
564 _scp_base, // the default sysclasspath
565 _scp_suffix, // from -Xbootclasspath/a:...
566 _scp_nitems // the number of items, must be last.
567 };
568
569 const char* _items[_scp_nitems];
570 };
571
572 SysClassPath::SysClassPath(const char* base) {
573 memset(_items, 0, sizeof(_items));
574 _items[_scp_base] = base;
575 }
576
577 SysClassPath::~SysClassPath() {
578 // Free everything except the base.
579 for (int i = 0; i < _scp_nitems; ++i) {
580 if (i != _scp_base) reset_item_at(i);
581 }
582 }
583
584 inline void SysClassPath::set_base(const char* base) {
585 _items[_scp_base] = base;
586 }
587
588 inline void SysClassPath::add_prefix(const char* prefix) {
589 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], prefix, true);
590 }
591
592 inline void SysClassPath::add_suffix_to_prefix(const char* suffix) {
593 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], suffix, false);
594 }
595
596 inline void SysClassPath::add_suffix(const char* suffix) {
597 _items[_scp_suffix] = add_to_path(_items[_scp_suffix], suffix, false);
598 }
599
600 inline void SysClassPath::reset_item_at(int index) {
601 assert(index < _scp_nitems && index != _scp_base, "just checking");
602 if (_items[index] != NULL) {
603 FREE_C_HEAP_ARRAY(char, _items[index]);
604 _items[index] = NULL;
605 }
606 }
607
608 inline void SysClassPath::reset_path(const char* base) {
609 // Clear the prefix and suffix.
610 reset_item_at(_scp_prefix);
611 reset_item_at(_scp_suffix);
612 set_base(base);
613 }
614
615 //------------------------------------------------------------------------------
616
617
618 // Combine the bootclasspath elements, some of which may be null, into a single
619 // c-heap-allocated string.
620 char* SysClassPath::combined_path() {
621 assert(_items[_scp_base] != NULL, "empty default sysclasspath");
622
623 size_t lengths[_scp_nitems];
624 size_t total_len = 0;
625
626 const char separator = *os::path_separator();
627
628 // Get the lengths.
629 int i;
630 for (i = 0; i < _scp_nitems; ++i) {
631 if (_items[i] != NULL) {
632 lengths[i] = strlen(_items[i]);
633 // Include space for the separator char (or a NULL for the last item).
634 total_len += lengths[i] + 1;
635 }
636 }
637 assert(total_len > 0, "empty sysclasspath not allowed");
638
639 // Copy the _items to a single string.
640 char* cp = NEW_C_HEAP_ARRAY(char, total_len, mtInternal);
641 char* cp_tmp = cp;
642 for (i = 0; i < _scp_nitems; ++i) {
643 if (_items[i] != NULL) {
644 memcpy(cp_tmp, _items[i], lengths[i]);
645 cp_tmp += lengths[i];
646 *cp_tmp++ = separator;
647 }
648 }
649 *--cp_tmp = '\0'; // Replace the extra separator.
650 return cp;
651 }
652
653 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null.
654 char*
655 SysClassPath::add_to_path(const char* path, const char* str, bool prepend) {
656 char *cp;
657
658 assert(str != NULL, "just checking");
659 if (path == NULL) {
660 size_t len = strlen(str) + 1;
661 cp = NEW_C_HEAP_ARRAY(char, len, mtInternal);
662 memcpy(cp, str, len); // copy the trailing null
663 } else {
664 const char separator = *os::path_separator();
665 size_t old_len = strlen(path);
666 size_t str_len = strlen(str);
667 size_t len = old_len + str_len + 2;
668
669 if (prepend) {
670 cp = NEW_C_HEAP_ARRAY(char, len, mtInternal);
671 char* cp_tmp = cp;
672 memcpy(cp_tmp, str, str_len);
673 cp_tmp += str_len;
674 *cp_tmp = separator;
675 memcpy(++cp_tmp, path, old_len + 1); // copy the trailing null
676 FREE_C_HEAP_ARRAY(char, path);
677 } else {
678 cp = REALLOC_C_HEAP_ARRAY(char, path, len, mtInternal);
679 char* cp_tmp = cp + old_len;
680 *cp_tmp = separator;
681 memcpy(++cp_tmp, str, str_len + 1); // copy the trailing null
682 }
683 }
684 return cp;
685 }
686
687 // Scan the directory and append any jar or zip files found to path.
688 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null.
689 char* SysClassPath::add_jars_to_path(char* path, const char* directory) {
690 DIR* dir = os::opendir(directory);
691 if (dir == NULL) return path;
692
693 char dir_sep[2] = { '\0', '\0' };
694 size_t directory_len = strlen(directory);
695 const char fileSep = *os::file_separator();
696 if (directory[directory_len - 1] != fileSep) dir_sep[0] = fileSep;
697
698 /* Scan the directory for jars/zips, appending them to path. */
699 struct dirent *entry;
700 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtInternal);
701 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL) {
702 const char* name = entry->d_name;
703 const char* ext = name + strlen(name) - 4;
704 bool isJarOrZip = ext > name &&
705 (os::file_name_strcmp(ext, ".jar") == 0 ||
706 os::file_name_strcmp(ext, ".zip") == 0);
707 if (isJarOrZip) {
708 char* jarpath = NEW_C_HEAP_ARRAY(char, directory_len + 2 + strlen(name), mtInternal);
709 sprintf(jarpath, "%s%s%s", directory, dir_sep, name);
710 path = add_to_path(path, jarpath, false);
711 FREE_C_HEAP_ARRAY(char, jarpath);
712 }
713 }
714 FREE_C_HEAP_ARRAY(char, dbuf);
715 os::closedir(dir);
716 return path;
717 }
718
719 // Parses a memory size specification string.
720 static bool atomull(const char *s, julong* result) {
721 julong n = 0;
722 int args_read = 0;
723 bool is_hex = false;
724 // Skip leading 0[xX] for hexadecimal
725 if (*s =='0' && (*(s+1) == 'x' || *(s+1) == 'X')) {
726 s += 2;
727 is_hex = true;
728 args_read = sscanf(s, JULONG_FORMAT_X, &n);
729 } else {
730 args_read = sscanf(s, JULONG_FORMAT, &n);
731 }
732 if (args_read != 1) {
733 return false;
734 }
735 while (*s != '\0' && (isdigit(*s) || (is_hex && isxdigit(*s)))) {
736 s++;
737 }
738 // 4705540: illegal if more characters are found after the first non-digit
739 if (strlen(s) > 1) {
740 return false;
741 }
742 switch (*s) {
743 case 'T': case 't':
744 *result = n * G * K;
745 // Check for overflow.
746 if (*result/((julong)G * K) != n) return false;
747 return true;
748 case 'G': case 'g':
749 *result = n * G;
750 if (*result/G != n) return false;
751 return true;
752 case 'M': case 'm':
753 *result = n * M;
754 if (*result/M != n) return false;
755 return true;
756 case 'K': case 'k':
757 *result = n * K;
758 if (*result/K != n) return false;
759 return true;
760 case '\0':
761 *result = n;
762 return true;
763 default:
764 return false;
765 }
766 }
767
768 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size) {
769 if (size < min_size) return arg_too_small;
770 // Check that size will fit in a size_t (only relevant on 32-bit)
771 if (size > max_uintx) return arg_too_big;
772 return arg_in_range;
773 }
774
775 // Describe an argument out of range error
776 void Arguments::describe_range_error(ArgsRange errcode) {
777 switch(errcode) {
778 case arg_too_big:
779 jio_fprintf(defaultStream::error_stream(),
780 "The specified size exceeds the maximum "
781 "representable size.\n");
782 break;
783 case arg_too_small:
784 case arg_unreadable:
785 case arg_in_range:
786 // do nothing for now
787 break;
788 default:
789 ShouldNotReachHere();
790 }
791 }
792
793 static bool set_bool_flag(const char* name, bool value, Flag::Flags origin) {
794 if (CommandLineFlags::boolAtPut(name, &value, origin) == Flag::SUCCESS) {
795 return true;
796 } else {
797 return false;
798 }
799 }
800
801 static bool set_fp_numeric_flag(const char* name, char* value, Flag::Flags origin) {
802 char* end;
803 errno = 0;
804 double v = strtod(value, &end);
805 if ((errno != 0) || (*end != 0)) {
806 return false;
807 }
808
809 if (CommandLineFlags::doubleAtPut(name, &v, origin) == Flag::SUCCESS) {
810 return true;
811 }
812 return false;
813 }
814
815 static bool set_numeric_flag(const char* name, char* value, Flag::Flags origin) {
816 julong v;
817 int int_v;
818 intx intx_v;
819 bool is_neg = false;
820 // Check the sign first since atomull() parses only unsigned values.
821 if (*value == '-') {
822 if ((CommandLineFlags::intxAt(name, &intx_v) != Flag::SUCCESS) && (CommandLineFlags::intAt(name, &int_v) != Flag::SUCCESS)) {
823 return false;
824 }
825 value++;
826 is_neg = true;
827 }
828 if (!atomull(value, &v)) {
829 return false;
830 }
831 int_v = (int) v;
832 if (is_neg) {
833 int_v = -int_v;
834 }
835 if (CommandLineFlags::intAtPut(name, &int_v, origin) == Flag::SUCCESS) {
836 return true;
837 }
838 uint uint_v = (uint) v;
839 if (!is_neg && CommandLineFlags::uintAtPut(name, &uint_v, origin) == Flag::SUCCESS) {
840 return true;
841 }
842 intx_v = (intx) v;
843 if (is_neg) {
844 intx_v = -intx_v;
845 }
846 if (CommandLineFlags::intxAtPut(name, &intx_v, origin) == Flag::SUCCESS) {
847 return true;
848 }
849 uintx uintx_v = (uintx) v;
850 if (!is_neg && (CommandLineFlags::uintxAtPut(name, &uintx_v, origin) == Flag::SUCCESS)) {
851 return true;
852 }
853 uint64_t uint64_t_v = (uint64_t) v;
854 if (!is_neg && (CommandLineFlags::uint64_tAtPut(name, &uint64_t_v, origin) == Flag::SUCCESS)) {
855 return true;
856 }
857 size_t size_t_v = (size_t) v;
858 if (!is_neg && (CommandLineFlags::size_tAtPut(name, &size_t_v, origin) == Flag::SUCCESS)) {
859 return true;
860 }
861 return false;
862 }
863
864 static bool set_string_flag(const char* name, const char* value, Flag::Flags origin) {
865 if (CommandLineFlags::ccstrAtPut(name, &value, origin) != Flag::SUCCESS) return false;
866 // Contract: CommandLineFlags always returns a pointer that needs freeing.
867 FREE_C_HEAP_ARRAY(char, value);
868 return true;
869 }
870
871 static bool append_to_string_flag(const char* name, const char* new_value, Flag::Flags origin) {
872 const char* old_value = "";
873 if (CommandLineFlags::ccstrAt(name, &old_value) != Flag::SUCCESS) return false;
874 size_t old_len = old_value != NULL ? strlen(old_value) : 0;
875 size_t new_len = strlen(new_value);
876 const char* value;
877 char* free_this_too = NULL;
878 if (old_len == 0) {
879 value = new_value;
880 } else if (new_len == 0) {
881 value = old_value;
882 } else {
883 char* buf = NEW_C_HEAP_ARRAY(char, old_len + 1 + new_len + 1, mtInternal);
884 // each new setting adds another LINE to the switch:
885 sprintf(buf, "%s\n%s", old_value, new_value);
886 value = buf;
887 free_this_too = buf;
888 }
889 (void) CommandLineFlags::ccstrAtPut(name, &value, origin);
890 // CommandLineFlags always returns a pointer that needs freeing.
891 FREE_C_HEAP_ARRAY(char, value);
892 if (free_this_too != NULL) {
893 // CommandLineFlags made its own copy, so I must delete my own temp. buffer.
894 FREE_C_HEAP_ARRAY(char, free_this_too);
895 }
896 return true;
897 }
898
899 const char* Arguments::handle_aliases_and_deprecation(const char* arg, bool warn) {
900 const char* real_name = real_flag_name(arg);
901 JDK_Version since = JDK_Version();
902 switch (is_deprecated_flag(arg, &since)) {
903 case -1:
904 return NULL; // obsolete or expired, don't process normally
905 case 0:
906 return real_name;
907 case 1: {
908 if (warn) {
909 char version[256];
910 since.to_string(version, sizeof(version));
911 if (real_name != arg) {
912 warning("Option %s was deprecated in version %s and will likely be removed in a future release. Use option %s instead.",
913 arg, version, real_name);
914 } else {
915 warning("Option %s was deprecated in version %s and will likely be removed in a future release.",
916 arg, version);
917 }
918 }
919 return real_name;
920 }
921 }
922 ShouldNotReachHere();
923 return NULL;
924 }
925
926 bool Arguments::parse_argument(const char* arg, Flag::Flags origin) {
927
928 // range of acceptable characters spelled out for portability reasons
929 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]"
930 #define BUFLEN 255
931 char name[BUFLEN+1];
932 char dummy;
933 const char* real_name;
934 bool warn_if_deprecated = true;
935
936 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
937 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
938 if (real_name == NULL) {
939 return false;
940 }
941 return set_bool_flag(real_name, false, origin);
942 }
943 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
944 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
945 if (real_name == NULL) {
946 return false;
947 }
948 return set_bool_flag(real_name, true, origin);
949 }
950
951 char punct;
952 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') {
953 const char* value = strchr(arg, '=') + 1;
954 Flag* flag;
955
956 // this scanf pattern matches both strings (handled here) and numbers (handled later))
957 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
958 if (real_name == NULL) {
959 return false;
960 }
961 flag = Flag::find_flag(real_name);
962 if (flag != NULL && flag->is_ccstr()) {
963 if (flag->ccstr_accumulates()) {
964 return append_to_string_flag(real_name, value, origin);
965 } else {
966 if (value[0] == '\0') {
967 value = NULL;
968 }
969 return set_string_flag(real_name, value, origin);
970 }
971 } else {
972 warn_if_deprecated = false; // if arg is deprecated, we've already done warning...
973 }
974 }
975
976 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') {
977 const char* value = strchr(arg, '=') + 1;
978 // -XX:Foo:=xxx will reset the string flag to the given value.
979 if (value[0] == '\0') {
980 value = NULL;
981 }
982 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
983 if (real_name == NULL) {
984 return false;
985 }
986 return set_string_flag(real_name, value, origin);
987 }
988
989 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.eE+]"
990 #define SIGNED_NUMBER_RANGE "[-0123456789]"
991 #define NUMBER_RANGE "[0123456789eE+-]"
992 char value[BUFLEN + 1];
993 char value2[BUFLEN + 1];
994 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) {
995 // Looks like a floating-point number -- try again with more lenient format string
996 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) {
997 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
998 if (real_name == NULL) {
999 return false;
1000 }
1001 return set_fp_numeric_flag(real_name, value, origin);
1002 }
1003 }
1004
1005 #define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]"
1006 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) {
1007 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1008 if (real_name == NULL) {
1009 return false;
1010 }
1011 return set_numeric_flag(real_name, value, origin);
1012 }
1013
1014 return false;
1015 }
1016
1017 void Arguments::add_string(char*** bldarray, int* count, const char* arg) {
1018 assert(bldarray != NULL, "illegal argument");
1019
1020 if (arg == NULL) {
1021 return;
1022 }
1023
1024 int new_count = *count + 1;
1025
1026 // expand the array and add arg to the last element
1027 if (*bldarray == NULL) {
1028 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtInternal);
1029 } else {
1030 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtInternal);
1031 }
1032 (*bldarray)[*count] = os::strdup_check_oom(arg);
1033 *count = new_count;
1034 }
1035
1036 void Arguments::build_jvm_args(const char* arg) {
1037 add_string(&_jvm_args_array, &_num_jvm_args, arg);
1038 }
1039
1040 void Arguments::build_jvm_flags(const char* arg) {
1041 add_string(&_jvm_flags_array, &_num_jvm_flags, arg);
1042 }
1043
1044 // utility function to return a string that concatenates all
1045 // strings in a given char** array
1046 const char* Arguments::build_resource_string(char** args, int count) {
1047 if (args == NULL || count == 0) {
1048 return NULL;
1049 }
1050 size_t length = strlen(args[0]) + 1; // add 1 for the null terminator
1051 for (int i = 1; i < count; i++) {
1052 length += strlen(args[i]) + 1; // add 1 for a space
1053 }
1054 char* s = NEW_RESOURCE_ARRAY(char, length);
1055 strcpy(s, args[0]);
1056 for (int j = 1; j < count; j++) {
1057 strcat(s, " ");
1058 strcat(s, args[j]);
1059 }
1060 return (const char*) s;
1061 }
1062
1063 void Arguments::print_on(outputStream* st) {
1064 st->print_cr("VM Arguments:");
1065 if (num_jvm_flags() > 0) {
1066 st->print("jvm_flags: "); print_jvm_flags_on(st);
1067 st->cr();
1068 }
1069 if (num_jvm_args() > 0) {
1070 st->print("jvm_args: "); print_jvm_args_on(st);
1071 st->cr();
1072 }
1073 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>");
1074 if (_java_class_path != NULL) {
1075 char* path = _java_class_path->value();
1076 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path );
1077 }
1078 st->print_cr("Launcher Type: %s", _sun_java_launcher);
1079 }
1080
1081 void Arguments::print_summary_on(outputStream* st) {
1082 // Print the command line. Environment variables that are helpful for
1083 // reproducing the problem are written later in the hs_err file.
1084 // flags are from setting file
1085 if (num_jvm_flags() > 0) {
1086 st->print_raw("Settings File: ");
1087 print_jvm_flags_on(st);
1088 st->cr();
1089 }
1090 // args are the command line and environment variable arguments.
1091 st->print_raw("Command Line: ");
1092 if (num_jvm_args() > 0) {
1093 print_jvm_args_on(st);
1094 }
1095 // this is the classfile and any arguments to the java program
1096 if (java_command() != NULL) {
1097 st->print("%s", java_command());
1098 }
1099 st->cr();
1100 }
1101
1102 void Arguments::print_jvm_flags_on(outputStream* st) {
1103 if (_num_jvm_flags > 0) {
1104 for (int i=0; i < _num_jvm_flags; i++) {
1105 st->print("%s ", _jvm_flags_array[i]);
1106 }
1107 }
1108 }
1109
1110 void Arguments::print_jvm_args_on(outputStream* st) {
1111 if (_num_jvm_args > 0) {
1112 for (int i=0; i < _num_jvm_args; i++) {
1113 st->print("%s ", _jvm_args_array[i]);
1114 }
1115 }
1116 }
1117
1118 bool Arguments::process_argument(const char* arg,
1119 jboolean ignore_unrecognized,
1120 Flag::Flags origin) {
1121 JDK_Version since = JDK_Version();
1122
1123 if (parse_argument(arg, origin) || ignore_unrecognized) {
1124 return true;
1125 }
1126
1127 // Determine if the flag has '+', '-', or '=' characters.
1128 bool has_plus_minus = (*arg == '+' || *arg == '-');
1129 const char* const argname = has_plus_minus ? arg + 1 : arg;
1130
1131 size_t arg_len;
1132 const char* equal_sign = strchr(argname, '=');
1133 if (equal_sign == NULL) {
1134 arg_len = strlen(argname);
1135 } else {
1136 arg_len = equal_sign - argname;
1137 }
1138
1139 // Only make the obsolete check for valid arguments.
1140 if (arg_len <= BUFLEN) {
1141 // Construct a string which consists only of the argument name without '+', '-', or '='.
1142 char stripped_argname[BUFLEN+1];
1143 strncpy(stripped_argname, argname, arg_len);
1144 stripped_argname[arg_len] = '\0'; // strncpy may not null terminate.
1145
1146 if (is_obsolete_flag(stripped_argname, &since)) {
1147 char version[256];
1148 since.to_string(version, sizeof(version));
1149 warning("Ignoring option %s; support was removed in %s", stripped_argname, version);
1150 return true;
1151 }
1152 }
1153
1154 // For locked flags, report a custom error message if available.
1155 // Otherwise, report the standard unrecognized VM option.
1156 Flag* found_flag = Flag::find_flag((const char*)argname, arg_len, true, true);
1157 if (found_flag != NULL) {
1158 char locked_message_buf[BUFLEN];
1159 found_flag->get_locked_message(locked_message_buf, BUFLEN);
1160 if (strlen(locked_message_buf) == 0) {
1161 if (found_flag->is_bool() && !has_plus_minus) {
1162 jio_fprintf(defaultStream::error_stream(),
1163 "Missing +/- setting for VM option '%s'\n", argname);
1164 } else if (!found_flag->is_bool() && has_plus_minus) {
1165 jio_fprintf(defaultStream::error_stream(),
1166 "Unexpected +/- setting in VM option '%s'\n", argname);
1167 } else {
1168 jio_fprintf(defaultStream::error_stream(),
1169 "Improperly specified VM option '%s'\n", argname);
1170 }
1171 } else {
1172 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf);
1173 }
1174 } else {
1175 jio_fprintf(defaultStream::error_stream(),
1176 "Unrecognized VM option '%s'\n", argname);
1177 Flag* fuzzy_matched = Flag::fuzzy_match((const char*)argname, arg_len, true);
1178 if (fuzzy_matched != NULL) {
1179 jio_fprintf(defaultStream::error_stream(),
1180 "Did you mean '%s%s%s'? ",
1181 (fuzzy_matched->is_bool()) ? "(+/-)" : "",
1182 fuzzy_matched->_name,
1183 (fuzzy_matched->is_bool()) ? "" : "=<value>");
1184 }
1185 }
1186
1187 // allow for commandline "commenting out" options like -XX:#+Verbose
1188 return arg[0] == '#';
1189 }
1190
1191 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) {
1192 FILE* stream = fopen(file_name, "rb");
1193 if (stream == NULL) {
1194 if (should_exist) {
1195 jio_fprintf(defaultStream::error_stream(),
1196 "Could not open settings file %s\n", file_name);
1197 return false;
1198 } else {
1199 return true;
1200 }
1201 }
1202
1203 char token[1024];
1204 int pos = 0;
1205
1206 bool in_white_space = true;
1207 bool in_comment = false;
1208 bool in_quote = false;
1209 char quote_c = 0;
1210 bool result = true;
1211
1212 int c = getc(stream);
1213 while(c != EOF && pos < (int)(sizeof(token)-1)) {
1214 if (in_white_space) {
1215 if (in_comment) {
1216 if (c == '\n') in_comment = false;
1217 } else {
1218 if (c == '#') in_comment = true;
1219 else if (!isspace(c)) {
1220 in_white_space = false;
1221 token[pos++] = c;
1222 }
1223 }
1224 } else {
1225 if (c == '\n' || (!in_quote && isspace(c))) {
1226 // token ends at newline, or at unquoted whitespace
1227 // this allows a way to include spaces in string-valued options
1228 token[pos] = '\0';
1229 logOption(token);
1230 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
1231 build_jvm_flags(token);
1232 pos = 0;
1233 in_white_space = true;
1234 in_quote = false;
1235 } else if (!in_quote && (c == '\'' || c == '"')) {
1236 in_quote = true;
1237 quote_c = c;
1238 } else if (in_quote && (c == quote_c)) {
1239 in_quote = false;
1240 } else {
1241 token[pos++] = c;
1242 }
1243 }
1244 c = getc(stream);
1245 }
1246 if (pos > 0) {
1247 token[pos] = '\0';
1248 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
1249 build_jvm_flags(token);
1250 }
1251 fclose(stream);
1252 return result;
1253 }
1254
1255 //=============================================================================================================
1256 // Parsing of properties (-D)
1257
1258 const char* Arguments::get_property(const char* key) {
1259 return PropertyList_get_value(system_properties(), key);
1260 }
1261
1262 bool Arguments::add_property(const char* prop) {
1263 const char* eq = strchr(prop, '=');
1264 const char* key;
1265 const char* value = "";
1266
1267 if (eq == NULL) {
1268 // property doesn't have a value, thus use passed string
1269 key = prop;
1270 } else {
1271 // property have a value, thus extract it and save to the
1272 // allocated string
1273 size_t key_len = eq - prop;
1274 char* tmp_key = AllocateHeap(key_len + 1, mtInternal);
1275
1276 strncpy(tmp_key, prop, key_len);
1277 tmp_key[key_len] = '\0';
1278 key = tmp_key;
1279
1280 value = &prop[key_len + 1];
1281 }
1282
1283 if (strcmp(key, "java.compiler") == 0) {
1284 process_java_compiler_argument(value);
1285 // Record value in Arguments, but let it get passed to Java.
1286 } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 ||
1287 strcmp(key, "sun.java.launcher.pid") == 0) {
1288 // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are
1289 // private and are processed in process_sun_java_launcher_properties();
1290 // the sun.java.launcher property is passed on to the java application
1291 } else if (strcmp(key, "sun.boot.library.path") == 0) {
1292 PropertyList_unique_add(&_system_properties, key, value, true);
1293 } else {
1294 if (strcmp(key, "sun.java.command") == 0) {
1295 if (_java_command != NULL) {
1296 os::free(_java_command);
1297 }
1298 _java_command = os::strdup_check_oom(value, mtInternal);
1299 } else if (strcmp(key, "java.vendor.url.bug") == 0) {
1300 if (_java_vendor_url_bug != DEFAULT_VENDOR_URL_BUG) {
1301 assert(_java_vendor_url_bug != NULL, "_java_vendor_url_bug is NULL");
1302 os::free((void *)_java_vendor_url_bug);
1303 }
1304 // save it in _java_vendor_url_bug, so JVM fatal error handler can access
1305 // its value without going through the property list or making a Java call.
1306 _java_vendor_url_bug = os::strdup_check_oom(value, mtInternal);
1307 }
1308
1309 // Create new property and add at the end of the list
1310 PropertyList_unique_add(&_system_properties, key, value);
1311 }
1312
1313 if (key != prop) {
1314 // SystemProperty copy passed value, thus free previously allocated
1315 // memory
1316 FreeHeap((void *)key);
1317 }
1318
1319 return true;
1320 }
1321
1322 //===========================================================================================================
1323 // Setting int/mixed/comp mode flags
1324
1325 void Arguments::set_mode_flags(Mode mode) {
1326 // Set up default values for all flags.
1327 // If you add a flag to any of the branches below,
1328 // add a default value for it here.
1329 set_java_compiler(false);
1330 _mode = mode;
1331
1332 // Ensure Agent_OnLoad has the correct initial values.
1333 // This may not be the final mode; mode may change later in onload phase.
1334 PropertyList_unique_add(&_system_properties, "java.vm.info",
1335 VM_Version::vm_info_string(), false);
1336
1337 UseInterpreter = true;
1338 UseCompiler = true;
1339 UseLoopCounter = true;
1340
1341 // Default values may be platform/compiler dependent -
1342 // use the saved values
1343 ClipInlining = Arguments::_ClipInlining;
1344 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods;
1345 UseOnStackReplacement = Arguments::_UseOnStackReplacement;
1346 BackgroundCompilation = Arguments::_BackgroundCompilation;
1347 if (TieredCompilation) {
1348 if (FLAG_IS_DEFAULT(Tier3InvokeNotifyFreqLog)) {
1349 Tier3InvokeNotifyFreqLog = Arguments::_Tier3InvokeNotifyFreqLog;
1350 }
1351 if (FLAG_IS_DEFAULT(Tier4InvocationThreshold)) {
1352 Tier4InvocationThreshold = Arguments::_Tier4InvocationThreshold;
1353 }
1354 }
1355
1356 // Change from defaults based on mode
1357 switch (mode) {
1358 default:
1359 ShouldNotReachHere();
1360 break;
1361 case _int:
1362 UseCompiler = false;
1363 UseLoopCounter = false;
1364 AlwaysCompileLoopMethods = false;
1365 UseOnStackReplacement = false;
1366 break;
1367 case _mixed:
1368 // same as default
1369 break;
1370 case _comp:
1371 UseInterpreter = false;
1372 BackgroundCompilation = false;
1373 ClipInlining = false;
1374 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more.
1375 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and
1376 // compile a level 4 (C2) and then continue executing it.
1377 if (TieredCompilation) {
1378 Tier3InvokeNotifyFreqLog = 0;
1379 Tier4InvocationThreshold = 0;
1380 }
1381 break;
1382 }
1383 }
1384
1385 #if defined(COMPILER2) || INCLUDE_JVMCI || defined(_LP64) || !INCLUDE_CDS
1386 // Conflict: required to use shared spaces (-Xshare:on), but
1387 // incompatible command line options were chosen.
1388
1389 static void no_shared_spaces(const char* message) {
1390 if (RequireSharedSpaces) {
1391 jio_fprintf(defaultStream::error_stream(),
1392 "Class data sharing is inconsistent with other specified options.\n");
1393 vm_exit_during_initialization("Unable to use shared archive.", message);
1394 } else {
1395 FLAG_SET_DEFAULT(UseSharedSpaces, false);
1396 }
1397 }
1398 #endif
1399
1400 // Returns threshold scaled with the value of scale.
1401 // If scale < 0.0, threshold is returned without scaling.
1402 intx Arguments::scaled_compile_threshold(intx threshold, double scale) {
1403 if (scale == 1.0 || scale < 0.0) {
1404 return threshold;
1405 } else {
1406 return (intx)(threshold * scale);
1407 }
1408 }
1409
1410 // Returns freq_log scaled with the value of scale.
1411 // Returned values are in the range of [0, InvocationCounter::number_of_count_bits + 1].
1412 // If scale < 0.0, freq_log is returned without scaling.
1413 intx Arguments::scaled_freq_log(intx freq_log, double scale) {
1414 // Check if scaling is necessary or if negative value was specified.
1415 if (scale == 1.0 || scale < 0.0) {
1416 return freq_log;
1417 }
1418 // Check values to avoid calculating log2 of 0.
1419 if (scale == 0.0 || freq_log == 0) {
1420 return 0;
1421 }
1422 // Determine the maximum notification frequency value currently supported.
1423 // The largest mask value that the interpreter/C1 can handle is
1424 // of length InvocationCounter::number_of_count_bits. Mask values are always
1425 // one bit shorter then the value of the notification frequency. Set
1426 // max_freq_bits accordingly.
1427 intx max_freq_bits = InvocationCounter::number_of_count_bits + 1;
1428 intx scaled_freq = scaled_compile_threshold((intx)1 << freq_log, scale);
1429 if (scaled_freq == 0) {
1430 // Return 0 right away to avoid calculating log2 of 0.
1431 return 0;
1432 } else if (scaled_freq > nth_bit(max_freq_bits)) {
1433 return max_freq_bits;
1434 } else {
1435 return log2_intptr(scaled_freq);
1436 }
1437 }
1438
1439 void Arguments::set_tiered_flags() {
1440 // With tiered, set default policy to AdvancedThresholdPolicy, which is 3.
1441 if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) {
1442 FLAG_SET_DEFAULT(CompilationPolicyChoice, 3);
1443 }
1444 if (CompilationPolicyChoice < 2) {
1445 vm_exit_during_initialization(
1446 "Incompatible compilation policy selected", NULL);
1447 }
1448 // Increase the code cache size - tiered compiles a lot more.
1449 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
1450 FLAG_SET_ERGO(uintx, ReservedCodeCacheSize,
1451 MIN2(CODE_CACHE_DEFAULT_LIMIT, ReservedCodeCacheSize * 5));
1452 }
1453 // Enable SegmentedCodeCache if TieredCompilation is enabled and ReservedCodeCacheSize >= 240M
1454 if (FLAG_IS_DEFAULT(SegmentedCodeCache) && ReservedCodeCacheSize >= 240*M) {
1455 FLAG_SET_ERGO(bool, SegmentedCodeCache, true);
1456
1457 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
1458 // Multiply sizes by 5 but fix NonNMethodCodeHeapSize (distribute among non-profiled and profiled code heap)
1459 if (FLAG_IS_DEFAULT(ProfiledCodeHeapSize)) {
1460 FLAG_SET_ERGO(uintx, ProfiledCodeHeapSize, ProfiledCodeHeapSize * 5 + NonNMethodCodeHeapSize * 2);
1461 }
1462 if (FLAG_IS_DEFAULT(NonProfiledCodeHeapSize)) {
1463 FLAG_SET_ERGO(uintx, NonProfiledCodeHeapSize, NonProfiledCodeHeapSize * 5 + NonNMethodCodeHeapSize * 2);
1464 }
1465 // Check consistency of code heap sizes
1466 if ((NonNMethodCodeHeapSize + NonProfiledCodeHeapSize + ProfiledCodeHeapSize) != ReservedCodeCacheSize) {
1467 jio_fprintf(defaultStream::error_stream(),
1468 "Invalid code heap sizes: NonNMethodCodeHeapSize(%dK) + ProfiledCodeHeapSize(%dK) + NonProfiledCodeHeapSize(%dK) = %dK. Must be equal to ReservedCodeCacheSize = %uK.\n",
1469 NonNMethodCodeHeapSize/K, ProfiledCodeHeapSize/K, NonProfiledCodeHeapSize/K,
1470 (NonNMethodCodeHeapSize + ProfiledCodeHeapSize + NonProfiledCodeHeapSize)/K, ReservedCodeCacheSize/K);
1471 vm_exit(1);
1472 }
1473 }
1474 }
1475 if (!UseInterpreter) { // -Xcomp
1476 Tier3InvokeNotifyFreqLog = 0;
1477 Tier4InvocationThreshold = 0;
1478 }
1479
1480 if (CompileThresholdScaling < 0) {
1481 vm_exit_during_initialization("Negative value specified for CompileThresholdScaling", NULL);
1482 }
1483
1484 // Scale tiered compilation thresholds.
1485 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves compilation thresholds unchanged.
1486 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
1487 FLAG_SET_ERGO(intx, Tier0InvokeNotifyFreqLog, scaled_freq_log(Tier0InvokeNotifyFreqLog));
1488 FLAG_SET_ERGO(intx, Tier0BackedgeNotifyFreqLog, scaled_freq_log(Tier0BackedgeNotifyFreqLog));
1489
1490 FLAG_SET_ERGO(intx, Tier3InvocationThreshold, scaled_compile_threshold(Tier3InvocationThreshold));
1491 FLAG_SET_ERGO(intx, Tier3MinInvocationThreshold, scaled_compile_threshold(Tier3MinInvocationThreshold));
1492 FLAG_SET_ERGO(intx, Tier3CompileThreshold, scaled_compile_threshold(Tier3CompileThreshold));
1493 FLAG_SET_ERGO(intx, Tier3BackEdgeThreshold, scaled_compile_threshold(Tier3BackEdgeThreshold));
1494
1495 // Tier2{Invocation,MinInvocation,Compile,Backedge}Threshold should be scaled here
1496 // once these thresholds become supported.
1497
1498 FLAG_SET_ERGO(intx, Tier2InvokeNotifyFreqLog, scaled_freq_log(Tier2InvokeNotifyFreqLog));
1499 FLAG_SET_ERGO(intx, Tier2BackedgeNotifyFreqLog, scaled_freq_log(Tier2BackedgeNotifyFreqLog));
1500
1501 FLAG_SET_ERGO(intx, Tier3InvokeNotifyFreqLog, scaled_freq_log(Tier3InvokeNotifyFreqLog));
1502 FLAG_SET_ERGO(intx, Tier3BackedgeNotifyFreqLog, scaled_freq_log(Tier3BackedgeNotifyFreqLog));
1503
1504 FLAG_SET_ERGO(intx, Tier23InlineeNotifyFreqLog, scaled_freq_log(Tier23InlineeNotifyFreqLog));
1505
1506 FLAG_SET_ERGO(intx, Tier4InvocationThreshold, scaled_compile_threshold(Tier4InvocationThreshold));
1507 FLAG_SET_ERGO(intx, Tier4MinInvocationThreshold, scaled_compile_threshold(Tier4MinInvocationThreshold));
1508 FLAG_SET_ERGO(intx, Tier4CompileThreshold, scaled_compile_threshold(Tier4CompileThreshold));
1509 FLAG_SET_ERGO(intx, Tier4BackEdgeThreshold, scaled_compile_threshold(Tier4BackEdgeThreshold));
1510 }
1511 }
1512
1513 #if INCLUDE_ALL_GCS
1514 static void disable_adaptive_size_policy(const char* collector_name) {
1515 if (UseAdaptiveSizePolicy) {
1516 if (FLAG_IS_CMDLINE(UseAdaptiveSizePolicy)) {
1517 warning("Disabling UseAdaptiveSizePolicy; it is incompatible with %s.",
1518 collector_name);
1519 }
1520 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false);
1521 }
1522 }
1523
1524 void Arguments::set_parnew_gc_flags() {
1525 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC && !UseG1GC,
1526 "control point invariant");
1527 assert(UseConcMarkSweepGC, "CMS is expected to be on here");
1528 assert(UseParNewGC, "ParNew should always be used with CMS");
1529
1530 if (FLAG_IS_DEFAULT(ParallelGCThreads)) {
1531 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads());
1532 assert(ParallelGCThreads > 0, "We should always have at least one thread by default");
1533 } else if (ParallelGCThreads == 0) {
1534 jio_fprintf(defaultStream::error_stream(),
1535 "The ParNew GC can not be combined with -XX:ParallelGCThreads=0\n");
1536 vm_exit(1);
1537 }
1538
1539 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 respectively,
1540 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration
1541 // we set them to 1024 and 1024.
1542 // See CR 6362902.
1543 if (FLAG_IS_DEFAULT(YoungPLABSize)) {
1544 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024);
1545 }
1546 if (FLAG_IS_DEFAULT(OldPLABSize)) {
1547 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024);
1548 }
1549
1550 // When using compressed oops, we use local overflow stacks,
1551 // rather than using a global overflow list chained through
1552 // the klass word of the object's pre-image.
1553 if (UseCompressedOops && !ParGCUseLocalOverflow) {
1554 if (!FLAG_IS_DEFAULT(ParGCUseLocalOverflow)) {
1555 warning("Forcing +ParGCUseLocalOverflow: needed if using compressed references");
1556 }
1557 FLAG_SET_DEFAULT(ParGCUseLocalOverflow, true);
1558 }
1559 assert(ParGCUseLocalOverflow || !UseCompressedOops, "Error");
1560 }
1561
1562 // Adjust some sizes to suit CMS and/or ParNew needs; these work well on
1563 // sparc/solaris for certain applications, but would gain from
1564 // further optimization and tuning efforts, and would almost
1565 // certainly gain from analysis of platform and environment.
1566 void Arguments::set_cms_and_parnew_gc_flags() {
1567 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC, "Error");
1568 assert(UseConcMarkSweepGC, "CMS is expected to be on here");
1569 assert(UseParNewGC, "ParNew should always be used with CMS");
1570
1571 // Turn off AdaptiveSizePolicy by default for cms until it is complete.
1572 disable_adaptive_size_policy("UseConcMarkSweepGC");
1573
1574 set_parnew_gc_flags();
1575
1576 size_t max_heap = align_size_down(MaxHeapSize,
1577 CardTableRS::ct_max_alignment_constraint());
1578
1579 // Now make adjustments for CMS
1580 intx tenuring_default = (intx)6;
1581 size_t young_gen_per_worker = CMSYoungGenPerWorker;
1582
1583 // Preferred young gen size for "short" pauses:
1584 // upper bound depends on # of threads and NewRatio.
1585 const size_t preferred_max_new_size_unaligned =
1586 MIN2(max_heap/(NewRatio+1), ScaleForWordSize(young_gen_per_worker * ParallelGCThreads));
1587 size_t preferred_max_new_size =
1588 align_size_up(preferred_max_new_size_unaligned, os::vm_page_size());
1589
1590 // Unless explicitly requested otherwise, size young gen
1591 // for "short" pauses ~ CMSYoungGenPerWorker*ParallelGCThreads
1592
1593 // If either MaxNewSize or NewRatio is set on the command line,
1594 // assume the user is trying to set the size of the young gen.
1595 if (FLAG_IS_DEFAULT(MaxNewSize) && FLAG_IS_DEFAULT(NewRatio)) {
1596
1597 // Set MaxNewSize to our calculated preferred_max_new_size unless
1598 // NewSize was set on the command line and it is larger than
1599 // preferred_max_new_size.
1600 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line
1601 FLAG_SET_ERGO(size_t, MaxNewSize, MAX2(NewSize, preferred_max_new_size));
1602 } else {
1603 FLAG_SET_ERGO(size_t, MaxNewSize, preferred_max_new_size);
1604 }
1605 if (PrintGCDetails && Verbose) {
1606 // Too early to use gclog_or_tty
1607 tty->print_cr("CMS ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize);
1608 }
1609
1610 // Code along this path potentially sets NewSize and OldSize
1611 if (PrintGCDetails && Verbose) {
1612 // Too early to use gclog_or_tty
1613 tty->print_cr("CMS set min_heap_size: " SIZE_FORMAT
1614 " initial_heap_size: " SIZE_FORMAT
1615 " max_heap: " SIZE_FORMAT,
1616 min_heap_size(), InitialHeapSize, max_heap);
1617 }
1618 size_t min_new = preferred_max_new_size;
1619 if (FLAG_IS_CMDLINE(NewSize)) {
1620 min_new = NewSize;
1621 }
1622 if (max_heap > min_new && min_heap_size() > min_new) {
1623 // Unless explicitly requested otherwise, make young gen
1624 // at least min_new, and at most preferred_max_new_size.
1625 if (FLAG_IS_DEFAULT(NewSize)) {
1626 FLAG_SET_ERGO(size_t, NewSize, MAX2(NewSize, min_new));
1627 FLAG_SET_ERGO(size_t, NewSize, MIN2(preferred_max_new_size, NewSize));
1628 if (PrintGCDetails && Verbose) {
1629 // Too early to use gclog_or_tty
1630 tty->print_cr("CMS ergo set NewSize: " SIZE_FORMAT, NewSize);
1631 }
1632 }
1633 // Unless explicitly requested otherwise, size old gen
1634 // so it's NewRatio x of NewSize.
1635 if (FLAG_IS_DEFAULT(OldSize)) {
1636 if (max_heap > NewSize) {
1637 FLAG_SET_ERGO(size_t, OldSize, MIN2(NewRatio*NewSize, max_heap - NewSize));
1638 if (PrintGCDetails && Verbose) {
1639 // Too early to use gclog_or_tty
1640 tty->print_cr("CMS ergo set OldSize: " SIZE_FORMAT, OldSize);
1641 }
1642 }
1643 }
1644 }
1645 }
1646 // Unless explicitly requested otherwise, definitely
1647 // promote all objects surviving "tenuring_default" scavenges.
1648 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) &&
1649 FLAG_IS_DEFAULT(SurvivorRatio)) {
1650 FLAG_SET_ERGO(uintx, MaxTenuringThreshold, tenuring_default);
1651 }
1652 // If we decided above (or user explicitly requested)
1653 // `promote all' (via MaxTenuringThreshold := 0),
1654 // prefer minuscule survivor spaces so as not to waste
1655 // space for (non-existent) survivors
1656 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) {
1657 FLAG_SET_ERGO(uintx, SurvivorRatio, MAX2((uintx)1024, SurvivorRatio));
1658 }
1659
1660 // OldPLABSize is interpreted in CMS as not the size of the PLAB in words,
1661 // but rather the number of free blocks of a given size that are used when
1662 // replenishing the local per-worker free list caches.
1663 if (FLAG_IS_DEFAULT(OldPLABSize)) {
1664 if (!FLAG_IS_DEFAULT(ResizeOldPLAB) && !ResizeOldPLAB) {
1665 // OldPLAB sizing manually turned off: Use a larger default setting,
1666 // unless it was manually specified. This is because a too-low value
1667 // will slow down scavenges.
1668 FLAG_SET_ERGO(size_t, OldPLABSize, CFLS_LAB::_default_static_old_plab_size); // default value before 6631166
1669 } else {
1670 FLAG_SET_DEFAULT(OldPLABSize, CFLS_LAB::_default_dynamic_old_plab_size); // old CMSParPromoteBlocksToClaim default
1671 }
1672 }
1673
1674 // If either of the static initialization defaults have changed, note this
1675 // modification.
1676 if (!FLAG_IS_DEFAULT(OldPLABSize) || !FLAG_IS_DEFAULT(OldPLABWeight)) {
1677 CFLS_LAB::modify_initialization(OldPLABSize, OldPLABWeight);
1678 }
1679
1680 if (!ClassUnloading) {
1681 FLAG_SET_CMDLINE(bool, CMSClassUnloadingEnabled, false);
1682 FLAG_SET_CMDLINE(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false);
1683 }
1684
1685 if (PrintGCDetails && Verbose) {
1686 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk",
1687 (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K));
1688 tty->print_cr("ConcGCThreads: %u", ConcGCThreads);
1689 }
1690 }
1691 #endif // INCLUDE_ALL_GCS
1692
1693 void set_object_alignment() {
1694 // Object alignment.
1695 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2");
1696 MinObjAlignmentInBytes = ObjectAlignmentInBytes;
1697 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small");
1698 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize;
1699 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect");
1700 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1;
1701
1702 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes);
1703 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize;
1704
1705 // Oop encoding heap max
1706 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes;
1707
1708 if (SurvivorAlignmentInBytes == 0) {
1709 SurvivorAlignmentInBytes = ObjectAlignmentInBytes;
1710 }
1711
1712 #if INCLUDE_ALL_GCS
1713 // Set CMS global values
1714 CompactibleFreeListSpace::set_cms_values();
1715 #endif // INCLUDE_ALL_GCS
1716 }
1717
1718 size_t Arguments::max_heap_for_compressed_oops() {
1719 // Avoid sign flip.
1720 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size");
1721 // We need to fit both the NULL page and the heap into the memory budget, while
1722 // keeping alignment constraints of the heap. To guarantee the latter, as the
1723 // NULL page is located before the heap, we pad the NULL page to the conservative
1724 // maximum alignment that the GC may ever impose upon the heap.
1725 size_t displacement_due_to_null_page = align_size_up_(os::vm_page_size(),
1726 _conservative_max_heap_alignment);
1727
1728 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page);
1729 NOT_LP64(ShouldNotReachHere(); return 0);
1730 }
1731
1732 bool Arguments::should_auto_select_low_pause_collector() {
1733 if (UseAutoGCSelectPolicy &&
1734 !FLAG_IS_DEFAULT(MaxGCPauseMillis) &&
1735 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) {
1736 if (PrintGCDetails) {
1737 // Cannot use gclog_or_tty yet.
1738 tty->print_cr("Automatic selection of the low pause collector"
1739 " based on pause goal of %d (ms)", (int) MaxGCPauseMillis);
1740 }
1741 return true;
1742 }
1743 return false;
1744 }
1745
1746 void Arguments::set_use_compressed_oops() {
1747 #ifndef ZERO
1748 #ifdef _LP64
1749 // MaxHeapSize is not set up properly at this point, but
1750 // the only value that can override MaxHeapSize if we are
1751 // to use UseCompressedOops is InitialHeapSize.
1752 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize);
1753
1754 if (max_heap_size <= max_heap_for_compressed_oops()) {
1755 #if !defined(COMPILER1) || defined(TIERED)
1756 if (FLAG_IS_DEFAULT(UseCompressedOops)) {
1757 FLAG_SET_ERGO(bool, UseCompressedOops, true);
1758 }
1759 #endif
1760 } else {
1761 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) {
1762 warning("Max heap size too large for Compressed Oops");
1763 FLAG_SET_DEFAULT(UseCompressedOops, false);
1764 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1765 }
1766 }
1767 #endif // _LP64
1768 #endif // ZERO
1769 }
1770
1771
1772 // NOTE: set_use_compressed_klass_ptrs() must be called after calling
1773 // set_use_compressed_oops().
1774 void Arguments::set_use_compressed_klass_ptrs() {
1775 #ifndef ZERO
1776 #ifdef _LP64
1777 // UseCompressedOops must be on for UseCompressedClassPointers to be on.
1778 if (!UseCompressedOops) {
1779 if (UseCompressedClassPointers) {
1780 warning("UseCompressedClassPointers requires UseCompressedOops");
1781 }
1782 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1783 } else {
1784 // Turn on UseCompressedClassPointers too
1785 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) {
1786 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true);
1787 }
1788 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs.
1789 if (UseCompressedClassPointers) {
1790 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) {
1791 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers");
1792 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1793 }
1794 }
1795 }
1796 #endif // _LP64
1797 #endif // !ZERO
1798 }
1799
1800 void Arguments::set_conservative_max_heap_alignment() {
1801 // The conservative maximum required alignment for the heap is the maximum of
1802 // the alignments imposed by several sources: any requirements from the heap
1803 // itself, the collector policy and the maximum page size we may run the VM
1804 // with.
1805 size_t heap_alignment = GenCollectedHeap::conservative_max_heap_alignment();
1806 #if INCLUDE_ALL_GCS
1807 if (UseParallelGC) {
1808 heap_alignment = ParallelScavengeHeap::conservative_max_heap_alignment();
1809 } else if (UseG1GC) {
1810 heap_alignment = G1CollectedHeap::conservative_max_heap_alignment();
1811 }
1812 #endif // INCLUDE_ALL_GCS
1813 _conservative_max_heap_alignment = MAX4(heap_alignment,
1814 (size_t)os::vm_allocation_granularity(),
1815 os::max_page_size(),
1816 CollectorPolicy::compute_heap_alignment());
1817 }
1818
1819 void Arguments::select_gc_ergonomically() {
1820 if (os::is_server_class_machine()) {
1821 if (should_auto_select_low_pause_collector()) {
1822 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true);
1823 } else {
1824 #if defined(JAVASE_EMBEDDED)
1825 FLAG_SET_ERGO(bool, UseParallelGC, true);
1826 #else
1827 FLAG_SET_ERGO(bool, UseG1GC, true);
1828 #endif
1829 }
1830 } else {
1831 FLAG_SET_ERGO(bool, UseSerialGC, true);
1832 }
1833 }
1834
1835 void Arguments::select_gc() {
1836 if (!gc_selected()) {
1837 select_gc_ergonomically();
1838 guarantee(gc_selected(), "No GC selected");
1839 }
1840 }
1841
1842 void Arguments::set_ergonomics_flags() {
1843 select_gc();
1844
1845 #if defined(COMPILER2) || INCLUDE_JVMCI
1846 // Shared spaces work fine with other GCs but causes bytecode rewriting
1847 // to be disabled, which hurts interpreter performance and decreases
1848 // server performance. When -server is specified, keep the default off
1849 // unless it is asked for. Future work: either add bytecode rewriting
1850 // at link time, or rewrite bytecodes in non-shared methods.
1851 if (!DumpSharedSpaces && !RequireSharedSpaces &&
1852 (FLAG_IS_DEFAULT(UseSharedSpaces) || !UseSharedSpaces)) {
1853 no_shared_spaces("COMPILER2 default: -Xshare:auto | off, have to manually setup to on.");
1854 }
1855 #endif
1856
1857 set_conservative_max_heap_alignment();
1858
1859 #ifndef ZERO
1860 #ifdef _LP64
1861 set_use_compressed_oops();
1862
1863 // set_use_compressed_klass_ptrs() must be called after calling
1864 // set_use_compressed_oops().
1865 set_use_compressed_klass_ptrs();
1866
1867 // Also checks that certain machines are slower with compressed oops
1868 // in vm_version initialization code.
1869 #endif // _LP64
1870 #endif // !ZERO
1871
1872 CodeCacheExtensions::set_ergonomics_flags();
1873 }
1874
1875 void Arguments::set_parallel_gc_flags() {
1876 assert(UseParallelGC || UseParallelOldGC, "Error");
1877 // Enable ParallelOld unless it was explicitly disabled (cmd line or rc file).
1878 if (FLAG_IS_DEFAULT(UseParallelOldGC)) {
1879 FLAG_SET_DEFAULT(UseParallelOldGC, true);
1880 }
1881 FLAG_SET_DEFAULT(UseParallelGC, true);
1882
1883 // If no heap maximum was requested explicitly, use some reasonable fraction
1884 // of the physical memory, up to a maximum of 1GB.
1885 FLAG_SET_DEFAULT(ParallelGCThreads,
1886 Abstract_VM_Version::parallel_worker_threads());
1887 if (ParallelGCThreads == 0) {
1888 jio_fprintf(defaultStream::error_stream(),
1889 "The Parallel GC can not be combined with -XX:ParallelGCThreads=0\n");
1890 vm_exit(1);
1891 }
1892
1893 if (UseAdaptiveSizePolicy) {
1894 // We don't want to limit adaptive heap sizing's freedom to adjust the heap
1895 // unless the user actually sets these flags.
1896 if (FLAG_IS_DEFAULT(MinHeapFreeRatio)) {
1897 FLAG_SET_DEFAULT(MinHeapFreeRatio, 0);
1898 }
1899 if (FLAG_IS_DEFAULT(MaxHeapFreeRatio)) {
1900 FLAG_SET_DEFAULT(MaxHeapFreeRatio, 100);
1901 }
1902 }
1903
1904 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the
1905 // SurvivorRatio has been set, reset their default values to SurvivorRatio +
1906 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger.
1907 // See CR 6362902 for details.
1908 if (!FLAG_IS_DEFAULT(SurvivorRatio)) {
1909 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) {
1910 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2);
1911 }
1912 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) {
1913 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2);
1914 }
1915 }
1916
1917 if (UseParallelOldGC) {
1918 // Par compact uses lower default values since they are treated as
1919 // minimums. These are different defaults because of the different
1920 // interpretation and are not ergonomically set.
1921 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) {
1922 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1);
1923 }
1924 }
1925 }
1926
1927 void Arguments::set_g1_gc_flags() {
1928 assert(UseG1GC, "Error");
1929 #if defined(COMPILER1) || INCLUDE_JVMCI
1930 FastTLABRefill = false;
1931 #endif
1932 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads());
1933 if (ParallelGCThreads == 0) {
1934 assert(!FLAG_IS_DEFAULT(ParallelGCThreads), "The default value for ParallelGCThreads should not be 0.");
1935 vm_exit_during_initialization("The flag -XX:+UseG1GC can not be combined with -XX:ParallelGCThreads=0", NULL);
1936 }
1937
1938 #if INCLUDE_ALL_GCS
1939 if (G1ConcRefinementThreads == 0) {
1940 FLAG_SET_DEFAULT(G1ConcRefinementThreads, ParallelGCThreads);
1941 }
1942 #endif
1943
1944 // MarkStackSize will be set (if it hasn't been set by the user)
1945 // when concurrent marking is initialized.
1946 // Its value will be based upon the number of parallel marking threads.
1947 // But we do set the maximum mark stack size here.
1948 if (FLAG_IS_DEFAULT(MarkStackSizeMax)) {
1949 FLAG_SET_DEFAULT(MarkStackSizeMax, 128 * TASKQUEUE_SIZE);
1950 }
1951
1952 if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) {
1953 // In G1, we want the default GC overhead goal to be higher than
1954 // say in PS. So we set it here to 10%. Otherwise the heap might
1955 // be expanded more aggressively than we would like it to. In
1956 // fact, even 10% seems to not be high enough in some cases
1957 // (especially small GC stress tests that the main thing they do
1958 // is allocation). We might consider increase it further.
1959 FLAG_SET_DEFAULT(GCTimeRatio, 9);
1960 }
1961
1962 if (PrintGCDetails && Verbose) {
1963 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk",
1964 (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K));
1965 tty->print_cr("ConcGCThreads: %u", ConcGCThreads);
1966 }
1967 }
1968
1969 #if !INCLUDE_ALL_GCS
1970 #ifdef ASSERT
1971 static bool verify_serial_gc_flags() {
1972 return (UseSerialGC &&
1973 !(UseParNewGC || (UseConcMarkSweepGC) || UseG1GC ||
1974 UseParallelGC || UseParallelOldGC));
1975 }
1976 #endif // ASSERT
1977 #endif // INCLUDE_ALL_GCS
1978
1979 void Arguments::set_gc_specific_flags() {
1980 #if INCLUDE_ALL_GCS
1981 // Set per-collector flags
1982 if (UseParallelGC || UseParallelOldGC) {
1983 set_parallel_gc_flags();
1984 } else if (UseConcMarkSweepGC) {
1985 set_cms_and_parnew_gc_flags();
1986 } else if (UseG1GC) {
1987 set_g1_gc_flags();
1988 }
1989 if (AssumeMP && !UseSerialGC) {
1990 if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) {
1991 warning("If the number of processors is expected to increase from one, then"
1992 " you should configure the number of parallel GC threads appropriately"
1993 " using -XX:ParallelGCThreads=N");
1994 }
1995 }
1996 if (MinHeapFreeRatio == 100) {
1997 // Keeping the heap 100% free is hard ;-) so limit it to 99%.
1998 FLAG_SET_ERGO(uintx, MinHeapFreeRatio, 99);
1999 }
2000 #else // INCLUDE_ALL_GCS
2001 assert(verify_serial_gc_flags(), "SerialGC unset");
2002 #endif // INCLUDE_ALL_GCS
2003 }
2004
2005 julong Arguments::limit_by_allocatable_memory(julong limit) {
2006 julong max_allocatable;
2007 julong result = limit;
2008 if (os::has_allocatable_memory_limit(&max_allocatable)) {
2009 result = MIN2(result, max_allocatable / MaxVirtMemFraction);
2010 }
2011 return result;
2012 }
2013
2014 // Use static initialization to get the default before parsing
2015 static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress;
2016
2017 void Arguments::set_heap_size() {
2018 const julong phys_mem =
2019 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM)
2020 : (julong)MaxRAM;
2021
2022 // If the maximum heap size has not been set with -Xmx,
2023 // then set it as fraction of the size of physical memory,
2024 // respecting the maximum and minimum sizes of the heap.
2025 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
2026 julong reasonable_max = phys_mem / MaxRAMFraction;
2027
2028 if (phys_mem <= MaxHeapSize * MinRAMFraction) {
2029 // Small physical memory, so use a minimum fraction of it for the heap
2030 reasonable_max = phys_mem / MinRAMFraction;
2031 } else {
2032 // Not-small physical memory, so require a heap at least
2033 // as large as MaxHeapSize
2034 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize);
2035 }
2036 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) {
2037 // Limit the heap size to ErgoHeapSizeLimit
2038 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit);
2039 }
2040 if (UseCompressedOops) {
2041 // Limit the heap size to the maximum possible when using compressed oops
2042 julong max_coop_heap = (julong)max_heap_for_compressed_oops();
2043
2044 // HeapBaseMinAddress can be greater than default but not less than.
2045 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) {
2046 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) {
2047 // matches compressed oops printing flags
2048 if (PrintCompressedOopsMode || (PrintMiscellaneous && Verbose)) {
2049 jio_fprintf(defaultStream::error_stream(),
2050 "HeapBaseMinAddress must be at least " SIZE_FORMAT
2051 " (" SIZE_FORMAT "G) which is greater than value given "
2052 SIZE_FORMAT "\n",
2053 DefaultHeapBaseMinAddress,
2054 DefaultHeapBaseMinAddress/G,
2055 HeapBaseMinAddress);
2056 }
2057 FLAG_SET_ERGO(size_t, HeapBaseMinAddress, DefaultHeapBaseMinAddress);
2058 }
2059 }
2060
2061 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) {
2062 // Heap should be above HeapBaseMinAddress to get zero based compressed oops
2063 // but it should be not less than default MaxHeapSize.
2064 max_coop_heap -= HeapBaseMinAddress;
2065 }
2066 reasonable_max = MIN2(reasonable_max, max_coop_heap);
2067 }
2068 reasonable_max = limit_by_allocatable_memory(reasonable_max);
2069
2070 if (!FLAG_IS_DEFAULT(InitialHeapSize)) {
2071 // An initial heap size was specified on the command line,
2072 // so be sure that the maximum size is consistent. Done
2073 // after call to limit_by_allocatable_memory because that
2074 // method might reduce the allocation size.
2075 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize);
2076 }
2077
2078 if (PrintGCDetails && Verbose) {
2079 // Cannot use gclog_or_tty yet.
2080 tty->print_cr(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max);
2081 }
2082 FLAG_SET_ERGO(size_t, MaxHeapSize, (size_t)reasonable_max);
2083 }
2084
2085 // If the minimum or initial heap_size have not been set or requested to be set
2086 // ergonomically, set them accordingly.
2087 if (InitialHeapSize == 0 || min_heap_size() == 0) {
2088 julong reasonable_minimum = (julong)(OldSize + NewSize);
2089
2090 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize);
2091
2092 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum);
2093
2094 if (InitialHeapSize == 0) {
2095 julong reasonable_initial = phys_mem / InitialRAMFraction;
2096
2097 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size());
2098 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize);
2099
2100 reasonable_initial = limit_by_allocatable_memory(reasonable_initial);
2101
2102 if (PrintGCDetails && Verbose) {
2103 // Cannot use gclog_or_tty yet.
2104 tty->print_cr(" Initial heap size " SIZE_FORMAT, (size_t)reasonable_initial);
2105 }
2106 FLAG_SET_ERGO(size_t, InitialHeapSize, (size_t)reasonable_initial);
2107 }
2108 // If the minimum heap size has not been set (via -Xms),
2109 // synchronize with InitialHeapSize to avoid errors with the default value.
2110 if (min_heap_size() == 0) {
2111 set_min_heap_size(MIN2((size_t)reasonable_minimum, InitialHeapSize));
2112 if (PrintGCDetails && Verbose) {
2113 // Cannot use gclog_or_tty yet.
2114 tty->print_cr(" Minimum heap size " SIZE_FORMAT, min_heap_size());
2115 }
2116 }
2117 }
2118 }
2119
2120 // This option inspects the machine and attempts to set various
2121 // parameters to be optimal for long-running, memory allocation
2122 // intensive jobs. It is intended for machines with large
2123 // amounts of cpu and memory.
2124 jint Arguments::set_aggressive_heap_flags() {
2125 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit
2126 // VM, but we may not be able to represent the total physical memory
2127 // available (like having 8gb of memory on a box but using a 32bit VM).
2128 // Thus, we need to make sure we're using a julong for intermediate
2129 // calculations.
2130 julong initHeapSize;
2131 julong total_memory = os::physical_memory();
2132
2133 if (total_memory < (julong) 256 * M) {
2134 jio_fprintf(defaultStream::error_stream(),
2135 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n");
2136 vm_exit(1);
2137 }
2138
2139 // The heap size is half of available memory, or (at most)
2140 // all of possible memory less 160mb (leaving room for the OS
2141 // when using ISM). This is the maximum; because adaptive sizing
2142 // is turned on below, the actual space used may be smaller.
2143
2144 initHeapSize = MIN2(total_memory / (julong) 2,
2145 total_memory - (julong) 160 * M);
2146
2147 initHeapSize = limit_by_allocatable_memory(initHeapSize);
2148
2149 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
2150 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, initHeapSize) != Flag::SUCCESS) {
2151 return JNI_EINVAL;
2152 }
2153 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, initHeapSize) != Flag::SUCCESS) {
2154 return JNI_EINVAL;
2155 }
2156 // Currently the minimum size and the initial heap sizes are the same.
2157 set_min_heap_size(initHeapSize);
2158 }
2159 if (FLAG_IS_DEFAULT(NewSize)) {
2160 // Make the young generation 3/8ths of the total heap.
2161 if (FLAG_SET_CMDLINE(size_t, NewSize,
2162 ((julong) MaxHeapSize / (julong) 8) * (julong) 3) != Flag::SUCCESS) {
2163 return JNI_EINVAL;
2164 }
2165 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, NewSize) != Flag::SUCCESS) {
2166 return JNI_EINVAL;
2167 }
2168 }
2169
2170 #if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
2171 FLAG_SET_DEFAULT(UseLargePages, true);
2172 #endif
2173
2174 // Increase some data structure sizes for efficiency
2175 if (FLAG_SET_CMDLINE(size_t, BaseFootPrintEstimate, MaxHeapSize) != Flag::SUCCESS) {
2176 return JNI_EINVAL;
2177 }
2178 if (FLAG_SET_CMDLINE(bool, ResizeTLAB, false) != Flag::SUCCESS) {
2179 return JNI_EINVAL;
2180 }
2181 if (FLAG_SET_CMDLINE(size_t, TLABSize, 256 * K) != Flag::SUCCESS) {
2182 return JNI_EINVAL;
2183 }
2184
2185 // See the OldPLABSize comment below, but replace 'after promotion'
2186 // with 'after copying'. YoungPLABSize is the size of the survivor
2187 // space per-gc-thread buffers. The default is 4kw.
2188 if (FLAG_SET_CMDLINE(size_t, YoungPLABSize, 256 * K) != Flag::SUCCESS) { // Note: this is in words
2189 return JNI_EINVAL;
2190 }
2191
2192 // OldPLABSize is the size of the buffers in the old gen that
2193 // UseParallelGC uses to promote live data that doesn't fit in the
2194 // survivor spaces. At any given time, there's one for each gc thread.
2195 // The default size is 1kw. These buffers are rarely used, since the
2196 // survivor spaces are usually big enough. For specjbb, however, there
2197 // are occasions when there's lots of live data in the young gen
2198 // and we end up promoting some of it. We don't have a definite
2199 // explanation for why bumping OldPLABSize helps, but the theory
2200 // is that a bigger PLAB results in retaining something like the
2201 // original allocation order after promotion, which improves mutator
2202 // locality. A minor effect may be that larger PLABs reduce the
2203 // number of PLAB allocation events during gc. The value of 8kw
2204 // was arrived at by experimenting with specjbb.
2205 if (FLAG_SET_CMDLINE(size_t, OldPLABSize, 8 * K) != Flag::SUCCESS) { // Note: this is in words
2206 return JNI_EINVAL;
2207 }
2208
2209 // Enable parallel GC and adaptive generation sizing
2210 if (FLAG_SET_CMDLINE(bool, UseParallelGC, true) != Flag::SUCCESS) {
2211 return JNI_EINVAL;
2212 }
2213 FLAG_SET_DEFAULT(ParallelGCThreads,
2214 Abstract_VM_Version::parallel_worker_threads());
2215
2216 // Encourage steady state memory management
2217 if (FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100) != Flag::SUCCESS) {
2218 return JNI_EINVAL;
2219 }
2220
2221 // This appears to improve mutator locality
2222 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
2223 return JNI_EINVAL;
2224 }
2225
2226 // Get around early Solaris scheduling bug
2227 // (affinity vs other jobs on system)
2228 // but disallow DR and offlining (5008695).
2229 if (FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true) != Flag::SUCCESS) {
2230 return JNI_EINVAL;
2231 }
2232
2233 return JNI_OK;
2234 }
2235
2236 // This must be called after ergonomics.
2237 void Arguments::set_bytecode_flags() {
2238 if (!RewriteBytecodes) {
2239 FLAG_SET_DEFAULT(RewriteFrequentPairs, false);
2240 }
2241 }
2242
2243 // Aggressive optimization flags -XX:+AggressiveOpts
2244 jint Arguments::set_aggressive_opts_flags() {
2245 #ifdef COMPILER2
2246 if (AggressiveUnboxing) {
2247 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
2248 FLAG_SET_DEFAULT(EliminateAutoBox, true);
2249 } else if (!EliminateAutoBox) {
2250 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled");
2251 AggressiveUnboxing = false;
2252 }
2253 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) {
2254 FLAG_SET_DEFAULT(DoEscapeAnalysis, true);
2255 } else if (!DoEscapeAnalysis) {
2256 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled");
2257 AggressiveUnboxing = false;
2258 }
2259 }
2260 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
2261 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
2262 FLAG_SET_DEFAULT(EliminateAutoBox, true);
2263 }
2264 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
2265 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000);
2266 }
2267
2268 // Feed the cache size setting into the JDK
2269 char buffer[1024];
2270 sprintf(buffer, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax);
2271 if (!add_property(buffer)) {
2272 return JNI_ENOMEM;
2273 }
2274 }
2275 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) {
2276 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500);
2277 }
2278 #endif
2279
2280 if (AggressiveOpts) {
2281 // Sample flag setting code
2282 // if (FLAG_IS_DEFAULT(EliminateZeroing)) {
2283 // FLAG_SET_DEFAULT(EliminateZeroing, true);
2284 // }
2285 }
2286
2287 return JNI_OK;
2288 }
2289
2290 //===========================================================================================================
2291 // Parsing of java.compiler property
2292
2293 void Arguments::process_java_compiler_argument(const char* arg) {
2294 // For backwards compatibility, Djava.compiler=NONE or ""
2295 // causes us to switch to -Xint mode UNLESS -Xdebug
2296 // is also specified.
2297 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) {
2298 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen.
2299 }
2300 }
2301
2302 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) {
2303 _sun_java_launcher = os::strdup_check_oom(launcher);
2304 }
2305
2306 bool Arguments::created_by_java_launcher() {
2307 assert(_sun_java_launcher != NULL, "property must have value");
2308 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0;
2309 }
2310
2311 bool Arguments::sun_java_launcher_is_altjvm() {
2312 return _sun_java_launcher_is_altjvm;
2313 }
2314
2315 //===========================================================================================================
2316 // Parsing of main arguments
2317
2318 // check if do gclog rotation
2319 // +UseGCLogFileRotation is a must,
2320 // no gc log rotation when log file not supplied or
2321 // NumberOfGCLogFiles is 0
2322 void check_gclog_consistency() {
2323 if (UseGCLogFileRotation) {
2324 if ((Arguments::gc_log_filename() == NULL) || (NumberOfGCLogFiles == 0)) {
2325 jio_fprintf(defaultStream::output_stream(),
2326 "To enable GC log rotation, use -Xloggc:<filename> -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=<num_of_files>\n"
2327 "where num_of_file > 0\n"
2328 "GC log rotation is turned off\n");
2329 UseGCLogFileRotation = false;
2330 }
2331 }
2332
2333 if (UseGCLogFileRotation && (GCLogFileSize != 0) && (GCLogFileSize < 8*K)) {
2334 if (FLAG_SET_CMDLINE(size_t, GCLogFileSize, 8*K) == Flag::SUCCESS) {
2335 jio_fprintf(defaultStream::output_stream(),
2336 "GCLogFileSize changed to minimum 8K\n");
2337 }
2338 }
2339 }
2340
2341 // This function is called for -Xloggc:<filename>, it can be used
2342 // to check if a given file name(or string) conforms to the following
2343 // specification:
2344 // A valid string only contains "[A-Z][a-z][0-9].-_%[p|t]"
2345 // %p and %t only allowed once. We only limit usage of filename not path
2346 bool is_filename_valid(const char *file_name) {
2347 const char* p = file_name;
2348 char file_sep = os::file_separator()[0];
2349 const char* cp;
2350 // skip prefix path
2351 for (cp = file_name; *cp != '\0'; cp++) {
2352 if (*cp == '/' || *cp == file_sep) {
2353 p = cp + 1;
2354 }
2355 }
2356
2357 int count_p = 0;
2358 int count_t = 0;
2359 while (*p != '\0') {
2360 if ((*p >= '0' && *p <= '9') ||
2361 (*p >= 'A' && *p <= 'Z') ||
2362 (*p >= 'a' && *p <= 'z') ||
2363 *p == '-' ||
2364 *p == '_' ||
2365 *p == '.') {
2366 p++;
2367 continue;
2368 }
2369 if (*p == '%') {
2370 if(*(p + 1) == 'p') {
2371 p += 2;
2372 count_p ++;
2373 continue;
2374 }
2375 if (*(p + 1) == 't') {
2376 p += 2;
2377 count_t ++;
2378 continue;
2379 }
2380 }
2381 return false;
2382 }
2383 return count_p < 2 && count_t < 2;
2384 }
2385
2386 // Check consistency of GC selection
2387 bool Arguments::check_gc_consistency() {
2388 check_gclog_consistency();
2389 // Ensure that the user has not selected conflicting sets
2390 // of collectors.
2391 uint i = 0;
2392 if (UseSerialGC) i++;
2393 if (UseConcMarkSweepGC) i++;
2394 if (UseParallelGC || UseParallelOldGC) i++;
2395 if (UseG1GC) i++;
2396 if (i > 1) {
2397 jio_fprintf(defaultStream::error_stream(),
2398 "Conflicting collector combinations in option list; "
2399 "please refer to the release notes for the combinations "
2400 "allowed\n");
2401 return false;
2402 }
2403
2404 if (UseConcMarkSweepGC && !UseParNewGC) {
2405 jio_fprintf(defaultStream::error_stream(),
2406 "It is not possible to combine the DefNew young collector with the CMS collector.\n");
2407 return false;
2408 }
2409
2410 if (UseParNewGC && !UseConcMarkSweepGC) {
2411 jio_fprintf(defaultStream::error_stream(),
2412 "It is not possible to combine the ParNew young collector with any collector other than CMS.\n");
2413 return false;
2414 }
2415
2416 return true;
2417 }
2418
2419 // Check the consistency of vm_init_args
2420 bool Arguments::check_vm_args_consistency() {
2421 // Method for adding checks for flag consistency.
2422 // The intent is to warn the user of all possible conflicts,
2423 // before returning an error.
2424 // Note: Needs platform-dependent factoring.
2425 bool status = true;
2426
2427 if (TLABRefillWasteFraction == 0) {
2428 jio_fprintf(defaultStream::error_stream(),
2429 "TLABRefillWasteFraction should be a denominator, "
2430 "not " SIZE_FORMAT "\n",
2431 TLABRefillWasteFraction);
2432 status = false;
2433 }
2434
2435 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) {
2436 MarkSweepAlwaysCompactCount = 1; // Move objects every gc.
2437 }
2438
2439 if (!(UseParallelGC || UseParallelOldGC) && FLAG_IS_DEFAULT(ScavengeBeforeFullGC)) {
2440 FLAG_SET_DEFAULT(ScavengeBeforeFullGC, false);
2441 }
2442
2443 if (GCTimeLimit == 100) {
2444 // Turn off gc-overhead-limit-exceeded checks
2445 FLAG_SET_DEFAULT(UseGCOverheadLimit, false);
2446 }
2447
2448 status = status && check_gc_consistency();
2449
2450 // CMS space iteration, which FLSVerifyAllHeapreferences entails,
2451 // insists that we hold the requisite locks so that the iteration is
2452 // MT-safe. For the verification at start-up and shut-down, we don't
2453 // yet have a good way of acquiring and releasing these locks,
2454 // which are not visible at the CollectedHeap level. We want to
2455 // be able to acquire these locks and then do the iteration rather
2456 // than just disable the lock verification. This will be fixed under
2457 // bug 4788986.
2458 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) {
2459 if (VerifyDuringStartup) {
2460 warning("Heap verification at start-up disabled "
2461 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
2462 VerifyDuringStartup = false; // Disable verification at start-up
2463 }
2464
2465 if (VerifyBeforeExit) {
2466 warning("Heap verification at shutdown disabled "
2467 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
2468 VerifyBeforeExit = false; // Disable verification at shutdown
2469 }
2470 }
2471
2472 // Note: only executed in non-PRODUCT mode
2473 if (!UseAsyncConcMarkSweepGC &&
2474 (ExplicitGCInvokesConcurrent ||
2475 ExplicitGCInvokesConcurrentAndUnloadsClasses)) {
2476 jio_fprintf(defaultStream::error_stream(),
2477 "error: +ExplicitGCInvokesConcurrent[AndUnloadsClasses] conflicts"
2478 " with -UseAsyncConcMarkSweepGC");
2479 status = false;
2480 }
2481
2482 if (PrintNMTStatistics) {
2483 #if INCLUDE_NMT
2484 if (MemTracker::tracking_level() == NMT_off) {
2485 #endif // INCLUDE_NMT
2486 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled");
2487 PrintNMTStatistics = false;
2488 #if INCLUDE_NMT
2489 }
2490 #endif
2491 }
2492 #if INCLUDE_JVMCI
2493 if (EnableJVMCI) {
2494 if (!ScavengeRootsInCode) {
2495 warning("forcing ScavengeRootsInCode non-zero because JVMCI is enabled");
2496 ScavengeRootsInCode = 1;
2497 }
2498 if (FLAG_IS_DEFAULT(TypeProfileLevel)) {
2499 TypeProfileLevel = 0;
2500 }
2501 if (UseJVMCICompiler) {
2502 if (FLAG_IS_DEFAULT(TypeProfileWidth)) {
2503 TypeProfileWidth = 8;
2504 }
2505 }
2506 }
2507 #endif
2508
2509 // Check lower bounds of the code cache
2510 // Template Interpreter code is approximately 3X larger in debug builds.
2511 uint min_code_cache_size = CodeCacheMinimumUseSpace DEBUG_ONLY(* 3);
2512 if (InitialCodeCacheSize < (uintx)os::vm_page_size()) {
2513 jio_fprintf(defaultStream::error_stream(),
2514 "Invalid InitialCodeCacheSize=%dK. Must be at least %dK.\n", InitialCodeCacheSize/K,
2515 os::vm_page_size()/K);
2516 status = false;
2517 } else if (ReservedCodeCacheSize < InitialCodeCacheSize) {
2518 jio_fprintf(defaultStream::error_stream(),
2519 "Invalid ReservedCodeCacheSize: %dK. Must be at least InitialCodeCacheSize=%dK.\n",
2520 ReservedCodeCacheSize/K, InitialCodeCacheSize/K);
2521 status = false;
2522 } else if (ReservedCodeCacheSize < min_code_cache_size) {
2523 jio_fprintf(defaultStream::error_stream(),
2524 "Invalid ReservedCodeCacheSize=%dK. Must be at least %uK.\n", ReservedCodeCacheSize/K,
2525 min_code_cache_size/K);
2526 status = false;
2527 } else if (ReservedCodeCacheSize > CODE_CACHE_SIZE_LIMIT) {
2528 // Code cache size larger than CODE_CACHE_SIZE_LIMIT is not supported.
2529 jio_fprintf(defaultStream::error_stream(),
2530 "Invalid ReservedCodeCacheSize=%dM. Must be at most %uM.\n", ReservedCodeCacheSize/M,
2531 CODE_CACHE_SIZE_LIMIT/M);
2532 status = false;
2533 } else if (NonNMethodCodeHeapSize < min_code_cache_size){
2534 jio_fprintf(defaultStream::error_stream(),
2535 "Invalid NonNMethodCodeHeapSize=%dK. Must be at least %uK.\n", NonNMethodCodeHeapSize/K,
2536 min_code_cache_size/K);
2537 status = false;
2538 } else if ((!FLAG_IS_DEFAULT(NonNMethodCodeHeapSize) || !FLAG_IS_DEFAULT(ProfiledCodeHeapSize) || !FLAG_IS_DEFAULT(NonProfiledCodeHeapSize))
2539 && (NonNMethodCodeHeapSize + NonProfiledCodeHeapSize + ProfiledCodeHeapSize) != ReservedCodeCacheSize) {
2540 jio_fprintf(defaultStream::error_stream(),
2541 "Invalid code heap sizes: NonNMethodCodeHeapSize(%dK) + ProfiledCodeHeapSize(%dK) + NonProfiledCodeHeapSize(%dK) = %dK. Must be equal to ReservedCodeCacheSize = %uK.\n",
2542 NonNMethodCodeHeapSize/K, ProfiledCodeHeapSize/K, NonProfiledCodeHeapSize/K,
2543 (NonNMethodCodeHeapSize + ProfiledCodeHeapSize + NonProfiledCodeHeapSize)/K, ReservedCodeCacheSize/K);
2544 status = false;
2545 }
2546
2547 if (!FLAG_IS_DEFAULT(CICompilerCount) && !FLAG_IS_DEFAULT(CICompilerCountPerCPU) && CICompilerCountPerCPU) {
2548 warning("The VM option CICompilerCountPerCPU overrides CICompilerCount.");
2549 }
2550
2551 return status;
2552 }
2553
2554 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore,
2555 const char* option_type) {
2556 if (ignore) return false;
2557
2558 const char* spacer = " ";
2559 if (option_type == NULL) {
2560 option_type = ++spacer; // Set both to the empty string.
2561 }
2562
2563 if (os::obsolete_option(option)) {
2564 jio_fprintf(defaultStream::error_stream(),
2565 "Obsolete %s%soption: %s\n", option_type, spacer,
2566 option->optionString);
2567 return false;
2568 } else {
2569 jio_fprintf(defaultStream::error_stream(),
2570 "Unrecognized %s%soption: %s\n", option_type, spacer,
2571 option->optionString);
2572 return true;
2573 }
2574 }
2575
2576 static const char* user_assertion_options[] = {
2577 "-da", "-ea", "-disableassertions", "-enableassertions", 0
2578 };
2579
2580 static const char* system_assertion_options[] = {
2581 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0
2582 };
2583
2584 bool Arguments::parse_uintx(const char* value,
2585 uintx* uintx_arg,
2586 uintx min_size) {
2587
2588 // Check the sign first since atomull() parses only unsigned values.
2589 bool value_is_positive = !(*value == '-');
2590
2591 if (value_is_positive) {
2592 julong n;
2593 bool good_return = atomull(value, &n);
2594 if (good_return) {
2595 bool above_minimum = n >= min_size;
2596 bool value_is_too_large = n > max_uintx;
2597
2598 if (above_minimum && !value_is_too_large) {
2599 *uintx_arg = n;
2600 return true;
2601 }
2602 }
2603 }
2604 return false;
2605 }
2606
2607 Arguments::ArgsRange Arguments::parse_memory_size(const char* s,
2608 julong* long_arg,
2609 julong min_size) {
2610 if (!atomull(s, long_arg)) return arg_unreadable;
2611 return check_memory_size(*long_arg, min_size);
2612 }
2613
2614 // Parse JavaVMInitArgs structure
2615
2616 jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args,
2617 const JavaVMInitArgs *java_options_args,
2618 const JavaVMInitArgs *cmd_line_args) {
2619 // For components of the system classpath.
2620 SysClassPath scp(Arguments::get_sysclasspath());
2621 bool scp_assembly_required = false;
2622
2623 // Save default settings for some mode flags
2624 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
2625 Arguments::_UseOnStackReplacement = UseOnStackReplacement;
2626 Arguments::_ClipInlining = ClipInlining;
2627 Arguments::_BackgroundCompilation = BackgroundCompilation;
2628 if (TieredCompilation) {
2629 Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
2630 Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
2631 }
2632
2633 // Setup flags for mixed which is the default
2634 set_mode_flags(_mixed);
2635
2636 // Parse args structure generated from JAVA_TOOL_OPTIONS environment
2637 // variable (if present).
2638 jint result = parse_each_vm_init_arg(
2639 java_tool_options_args, &scp, &scp_assembly_required, Flag::ENVIRON_VAR);
2640 if (result != JNI_OK) {
2641 return result;
2642 }
2643
2644 // Parse args structure generated from the command line flags.
2645 result = parse_each_vm_init_arg(cmd_line_args, &scp, &scp_assembly_required,
2646 Flag::COMMAND_LINE);
2647 if (result != JNI_OK) {
2648 return result;
2649 }
2650
2651 // Parse args structure generated from the _JAVA_OPTIONS environment
2652 // variable (if present) (mimics classic VM)
2653 result = parse_each_vm_init_arg(
2654 java_options_args, &scp, &scp_assembly_required, Flag::ENVIRON_VAR);
2655 if (result != JNI_OK) {
2656 return result;
2657 }
2658
2659 // Do final processing now that all arguments have been parsed
2660 result = finalize_vm_init_args(&scp, scp_assembly_required);
2661 if (result != JNI_OK) {
2662 return result;
2663 }
2664
2665 return JNI_OK;
2666 }
2667
2668 // Checks if name in command-line argument -agent{lib,path}:name[=options]
2669 // represents a valid JDWP agent. is_path==true denotes that we
2670 // are dealing with -agentpath (case where name is a path), otherwise with
2671 // -agentlib
2672 bool valid_jdwp_agent(char *name, bool is_path) {
2673 char *_name;
2674 const char *_jdwp = "jdwp";
2675 size_t _len_jdwp, _len_prefix;
2676
2677 if (is_path) {
2678 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) {
2679 return false;
2680 }
2681
2682 _name++; // skip past last path separator
2683 _len_prefix = strlen(JNI_LIB_PREFIX);
2684
2685 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) {
2686 return false;
2687 }
2688
2689 _name += _len_prefix;
2690 _len_jdwp = strlen(_jdwp);
2691
2692 if (strncmp(_name, _jdwp, _len_jdwp) == 0) {
2693 _name += _len_jdwp;
2694 }
2695 else {
2696 return false;
2697 }
2698
2699 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) {
2700 return false;
2701 }
2702
2703 return true;
2704 }
2705
2706 if (strcmp(name, _jdwp) == 0) {
2707 return true;
2708 }
2709
2710 return false;
2711 }
2712
2713 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args,
2714 SysClassPath* scp_p,
2715 bool* scp_assembly_required_p,
2716 Flag::Flags origin) {
2717 // Remaining part of option string
2718 const char* tail;
2719
2720 // iterate over arguments
2721 for (int index = 0; index < args->nOptions; index++) {
2722 bool is_absolute_path = false; // for -agentpath vs -agentlib
2723
2724 const JavaVMOption* option = args->options + index;
2725
2726 if (!match_option(option, "-Djava.class.path", &tail) &&
2727 !match_option(option, "-Dsun.java.command", &tail) &&
2728 !match_option(option, "-Dsun.java.launcher", &tail)) {
2729
2730 // add all jvm options to the jvm_args string. This string
2731 // is used later to set the java.vm.args PerfData string constant.
2732 // the -Djava.class.path and the -Dsun.java.command options are
2733 // omitted from jvm_args string as each have their own PerfData
2734 // string constant object.
2735 build_jvm_args(option->optionString);
2736 }
2737
2738 // -verbose:[class/gc/jni]
2739 if (match_option(option, "-verbose", &tail)) {
2740 if (!strcmp(tail, ":class") || !strcmp(tail, "")) {
2741 if (FLAG_SET_CMDLINE(bool, TraceClassLoading, true) != Flag::SUCCESS) {
2742 return JNI_EINVAL;
2743 }
2744 if (FLAG_SET_CMDLINE(bool, TraceClassUnloading, true) != Flag::SUCCESS) {
2745 return JNI_EINVAL;
2746 }
2747 } else if (!strcmp(tail, ":gc")) {
2748 if (FLAG_SET_CMDLINE(bool, PrintGC, true) != Flag::SUCCESS) {
2749 return JNI_EINVAL;
2750 }
2751 } else if (!strcmp(tail, ":jni")) {
2752 if (FLAG_SET_CMDLINE(bool, PrintJNIResolving, true) != Flag::SUCCESS) {
2753 return JNI_EINVAL;
2754 }
2755 }
2756 // -da / -ea / -disableassertions / -enableassertions
2757 // These accept an optional class/package name separated by a colon, e.g.,
2758 // -da:java.lang.Thread.
2759 } else if (match_option(option, user_assertion_options, &tail, true)) {
2760 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2761 if (*tail == '\0') {
2762 JavaAssertions::setUserClassDefault(enable);
2763 } else {
2764 assert(*tail == ':', "bogus match by match_option()");
2765 JavaAssertions::addOption(tail + 1, enable);
2766 }
2767 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions
2768 } else if (match_option(option, system_assertion_options, &tail, false)) {
2769 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2770 JavaAssertions::setSystemClassDefault(enable);
2771 // -bootclasspath:
2772 } else if (match_option(option, "-Xbootclasspath:", &tail)) {
2773 scp_p->reset_path(tail);
2774 *scp_assembly_required_p = true;
2775 // -bootclasspath/a:
2776 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) {
2777 scp_p->add_suffix(tail);
2778 *scp_assembly_required_p = true;
2779 // -bootclasspath/p:
2780 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) {
2781 scp_p->add_prefix(tail);
2782 *scp_assembly_required_p = true;
2783 // -Xrun
2784 } else if (match_option(option, "-Xrun", &tail)) {
2785 if (tail != NULL) {
2786 const char* pos = strchr(tail, ':');
2787 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2788 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len);
2789 name[len] = '\0';
2790
2791 char *options = NULL;
2792 if(pos != NULL) {
2793 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied.
2794 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtInternal), pos+1, len2);
2795 }
2796 #if !INCLUDE_JVMTI
2797 if (strcmp(name, "jdwp") == 0) {
2798 jio_fprintf(defaultStream::error_stream(),
2799 "Debugging agents are not supported in this VM\n");
2800 return JNI_ERR;
2801 }
2802 #endif // !INCLUDE_JVMTI
2803 add_init_library(name, options);
2804 }
2805 // -agentlib and -agentpath
2806 } else if (match_option(option, "-agentlib:", &tail) ||
2807 (is_absolute_path = match_option(option, "-agentpath:", &tail))) {
2808 if(tail != NULL) {
2809 const char* pos = strchr(tail, '=');
2810 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2811 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len);
2812 name[len] = '\0';
2813
2814 char *options = NULL;
2815 if(pos != NULL) {
2816 options = os::strdup_check_oom(pos + 1, mtInternal);
2817 }
2818 #if !INCLUDE_JVMTI
2819 if (valid_jdwp_agent(name, is_absolute_path)) {
2820 jio_fprintf(defaultStream::error_stream(),
2821 "Debugging agents are not supported in this VM\n");
2822 return JNI_ERR;
2823 }
2824 #endif // !INCLUDE_JVMTI
2825 add_init_agent(name, options, is_absolute_path);
2826 }
2827 // -javaagent
2828 } else if (match_option(option, "-javaagent:", &tail)) {
2829 #if !INCLUDE_JVMTI
2830 jio_fprintf(defaultStream::error_stream(),
2831 "Instrumentation agents are not supported in this VM\n");
2832 return JNI_ERR;
2833 #else
2834 if(tail != NULL) {
2835 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1, mtInternal), tail);
2836 add_init_agent("instrument", options, false);
2837 }
2838 #endif // !INCLUDE_JVMTI
2839 // -Xnoclassgc
2840 } else if (match_option(option, "-Xnoclassgc")) {
2841 if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != Flag::SUCCESS) {
2842 return JNI_EINVAL;
2843 }
2844 // -Xconcgc
2845 } else if (match_option(option, "-Xconcgc")) {
2846 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true) != Flag::SUCCESS) {
2847 return JNI_EINVAL;
2848 }
2849 // -Xnoconcgc
2850 } else if (match_option(option, "-Xnoconcgc")) {
2851 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false) != Flag::SUCCESS) {
2852 return JNI_EINVAL;
2853 }
2854 // -Xbatch
2855 } else if (match_option(option, "-Xbatch")) {
2856 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
2857 return JNI_EINVAL;
2858 }
2859 // -Xmn for compatibility with other JVM vendors
2860 } else if (match_option(option, "-Xmn", &tail)) {
2861 julong long_initial_young_size = 0;
2862 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1);
2863 if (errcode != arg_in_range) {
2864 jio_fprintf(defaultStream::error_stream(),
2865 "Invalid initial young generation size: %s\n", option->optionString);
2866 describe_range_error(errcode);
2867 return JNI_EINVAL;
2868 }
2869 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
2870 return JNI_EINVAL;
2871 }
2872 if (FLAG_SET_CMDLINE(size_t, NewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
2873 return JNI_EINVAL;
2874 }
2875 // -Xms
2876 } else if (match_option(option, "-Xms", &tail)) {
2877 julong long_initial_heap_size = 0;
2878 // an initial heap size of 0 means automatically determine
2879 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0);
2880 if (errcode != arg_in_range) {
2881 jio_fprintf(defaultStream::error_stream(),
2882 "Invalid initial heap size: %s\n", option->optionString);
2883 describe_range_error(errcode);
2884 return JNI_EINVAL;
2885 }
2886 set_min_heap_size((size_t)long_initial_heap_size);
2887 // Currently the minimum size and the initial heap sizes are the same.
2888 // Can be overridden with -XX:InitialHeapSize.
2889 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, (size_t)long_initial_heap_size) != Flag::SUCCESS) {
2890 return JNI_EINVAL;
2891 }
2892 // -Xmx
2893 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) {
2894 julong long_max_heap_size = 0;
2895 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1);
2896 if (errcode != arg_in_range) {
2897 jio_fprintf(defaultStream::error_stream(),
2898 "Invalid maximum heap size: %s\n", option->optionString);
2899 describe_range_error(errcode);
2900 return JNI_EINVAL;
2901 }
2902 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, (size_t)long_max_heap_size) != Flag::SUCCESS) {
2903 return JNI_EINVAL;
2904 }
2905 // Xmaxf
2906 } else if (match_option(option, "-Xmaxf", &tail)) {
2907 char* err;
2908 int maxf = (int)(strtod(tail, &err) * 100);
2909 if (*err != '\0' || *tail == '\0') {
2910 jio_fprintf(defaultStream::error_stream(),
2911 "Bad max heap free percentage size: %s\n",
2912 option->optionString);
2913 return JNI_EINVAL;
2914 } else {
2915 if (FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf) != Flag::SUCCESS) {
2916 return JNI_EINVAL;
2917 }
2918 }
2919 // Xminf
2920 } else if (match_option(option, "-Xminf", &tail)) {
2921 char* err;
2922 int minf = (int)(strtod(tail, &err) * 100);
2923 if (*err != '\0' || *tail == '\0') {
2924 jio_fprintf(defaultStream::error_stream(),
2925 "Bad min heap free percentage size: %s\n",
2926 option->optionString);
2927 return JNI_EINVAL;
2928 } else {
2929 if (FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf) != Flag::SUCCESS) {
2930 return JNI_EINVAL;
2931 }
2932 }
2933 // -Xss
2934 } else if (match_option(option, "-Xss", &tail)) {
2935 julong long_ThreadStackSize = 0;
2936 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000);
2937 if (errcode != arg_in_range) {
2938 jio_fprintf(defaultStream::error_stream(),
2939 "Invalid thread stack size: %s\n", option->optionString);
2940 describe_range_error(errcode);
2941 return JNI_EINVAL;
2942 }
2943 // Internally track ThreadStackSize in units of 1024 bytes.
2944 if (FLAG_SET_CMDLINE(intx, ThreadStackSize,
2945 round_to((int)long_ThreadStackSize, K) / K) != Flag::SUCCESS) {
2946 return JNI_EINVAL;
2947 }
2948 // -Xoss, -Xsqnopause, -Xoptimize, -Xboundthreads
2949 } else if (match_option(option, "-Xoss", &tail) ||
2950 match_option(option, "-Xsqnopause") ||
2951 match_option(option, "-Xoptimize") ||
2952 match_option(option, "-Xboundthreads")) {
2953 // All these options are deprecated in JDK 9 and will be removed in a future release
2954 char version[256];
2955 JDK_Version::jdk(9).to_string(version, sizeof(version));
2956 warning("Ignoring option %s; support was removed in %s", option->optionString, version);
2957 } else if (match_option(option, "-XX:CodeCacheExpansionSize=", &tail)) {
2958 julong long_CodeCacheExpansionSize = 0;
2959 ArgsRange errcode = parse_memory_size(tail, &long_CodeCacheExpansionSize, os::vm_page_size());
2960 if (errcode != arg_in_range) {
2961 jio_fprintf(defaultStream::error_stream(),
2962 "Invalid argument: %s. Must be at least %luK.\n", option->optionString,
2963 os::vm_page_size()/K);
2964 return JNI_EINVAL;
2965 }
2966 if (FLAG_SET_CMDLINE(uintx, CodeCacheExpansionSize, (uintx)long_CodeCacheExpansionSize) != Flag::SUCCESS) {
2967 return JNI_EINVAL;
2968 }
2969 } else if (match_option(option, "-Xmaxjitcodesize", &tail) ||
2970 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) {
2971 julong long_ReservedCodeCacheSize = 0;
2972
2973 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1);
2974 if (errcode != arg_in_range) {
2975 jio_fprintf(defaultStream::error_stream(),
2976 "Invalid maximum code cache size: %s.\n", option->optionString);
2977 return JNI_EINVAL;
2978 }
2979 if (FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != Flag::SUCCESS) {
2980 return JNI_EINVAL;
2981 }
2982 // -XX:NonNMethodCodeHeapSize=
2983 } else if (match_option(option, "-XX:NonNMethodCodeHeapSize=", &tail)) {
2984 julong long_NonNMethodCodeHeapSize = 0;
2985
2986 ArgsRange errcode = parse_memory_size(tail, &long_NonNMethodCodeHeapSize, 1);
2987 if (errcode != arg_in_range) {
2988 jio_fprintf(defaultStream::error_stream(),
2989 "Invalid maximum non-nmethod code heap size: %s.\n", option->optionString);
2990 return JNI_EINVAL;
2991 }
2992 if (FLAG_SET_CMDLINE(uintx, NonNMethodCodeHeapSize, (uintx)long_NonNMethodCodeHeapSize) != Flag::SUCCESS) {
2993 return JNI_EINVAL;
2994 }
2995 // -XX:ProfiledCodeHeapSize=
2996 } else if (match_option(option, "-XX:ProfiledCodeHeapSize=", &tail)) {
2997 julong long_ProfiledCodeHeapSize = 0;
2998
2999 ArgsRange errcode = parse_memory_size(tail, &long_ProfiledCodeHeapSize, 1);
3000 if (errcode != arg_in_range) {
3001 jio_fprintf(defaultStream::error_stream(),
3002 "Invalid maximum profiled code heap size: %s.\n", option->optionString);
3003 return JNI_EINVAL;
3004 }
3005 if (FLAG_SET_CMDLINE(uintx, ProfiledCodeHeapSize, (uintx)long_ProfiledCodeHeapSize) != Flag::SUCCESS) {
3006 return JNI_EINVAL;
3007 }
3008 // -XX:NonProfiledCodeHeapSizee=
3009 } else if (match_option(option, "-XX:NonProfiledCodeHeapSize=", &tail)) {
3010 julong long_NonProfiledCodeHeapSize = 0;
3011
3012 ArgsRange errcode = parse_memory_size(tail, &long_NonProfiledCodeHeapSize, 1);
3013 if (errcode != arg_in_range) {
3014 jio_fprintf(defaultStream::error_stream(),
3015 "Invalid maximum non-profiled code heap size: %s.\n", option->optionString);
3016 return JNI_EINVAL;
3017 }
3018 if (FLAG_SET_CMDLINE(uintx, NonProfiledCodeHeapSize, (uintx)long_NonProfiledCodeHeapSize) != Flag::SUCCESS) {
3019 return JNI_EINVAL;
3020 }
3021 // -green
3022 } else if (match_option(option, "-green")) {
3023 jio_fprintf(defaultStream::error_stream(),
3024 "Green threads support not available\n");
3025 return JNI_EINVAL;
3026 // -native
3027 } else if (match_option(option, "-native")) {
3028 // HotSpot always uses native threads, ignore silently for compatibility
3029 // -Xrs
3030 } else if (match_option(option, "-Xrs")) {
3031 // Classic/EVM option, new functionality
3032 if (FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true) != Flag::SUCCESS) {
3033 return JNI_EINVAL;
3034 }
3035 } else if (match_option(option, "-Xusealtsigs")) {
3036 // change default internal VM signals used - lower case for back compat
3037 if (FLAG_SET_CMDLINE(bool, UseAltSigs, true) != Flag::SUCCESS) {
3038 return JNI_EINVAL;
3039 }
3040 // -Xprof
3041 } else if (match_option(option, "-Xprof")) {
3042 #if INCLUDE_FPROF
3043 _has_profile = true;
3044 #else // INCLUDE_FPROF
3045 jio_fprintf(defaultStream::error_stream(),
3046 "Flat profiling is not supported in this VM.\n");
3047 return JNI_ERR;
3048 #endif // INCLUDE_FPROF
3049 // -Xconcurrentio
3050 } else if (match_option(option, "-Xconcurrentio")) {
3051 if (FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true) != Flag::SUCCESS) {
3052 return JNI_EINVAL;
3053 }
3054 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
3055 return JNI_EINVAL;
3056 }
3057 if (FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1) != Flag::SUCCESS) {
3058 return JNI_EINVAL;
3059 }
3060 if (FLAG_SET_CMDLINE(bool, UseTLAB, false) != Flag::SUCCESS) {
3061 return JNI_EINVAL;
3062 }
3063 if (FLAG_SET_CMDLINE(size_t, NewSizeThreadIncrease, 16 * K) != Flag::SUCCESS) { // 20Kb per thread added to new generation
3064 return JNI_EINVAL;
3065 }
3066
3067 // -Xinternalversion
3068 } else if (match_option(option, "-Xinternalversion")) {
3069 jio_fprintf(defaultStream::output_stream(), "%s\n",
3070 VM_Version::internal_vm_info_string());
3071 vm_exit(0);
3072 #ifndef PRODUCT
3073 // -Xprintflags
3074 } else if (match_option(option, "-Xprintflags")) {
3075 CommandLineFlags::printFlags(tty, false);
3076 vm_exit(0);
3077 #endif
3078 // -D
3079 } else if (match_option(option, "-D", &tail)) {
3080 const char* value;
3081 if (match_option(option, "-Djava.endorsed.dirs=", &value) &&
3082 *value!= '\0' && strcmp(value, "\"\"") != 0) {
3083 // abort if -Djava.endorsed.dirs is set
3084 jio_fprintf(defaultStream::output_stream(),
3085 "-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n"
3086 "in modular form will be supported via the concept of upgradeable modules.\n", value);
3087 return JNI_EINVAL;
3088 }
3089 if (match_option(option, "-Djava.ext.dirs=", &value) &&
3090 *value != '\0' && strcmp(value, "\"\"") != 0) {
3091 // abort if -Djava.ext.dirs is set
3092 jio_fprintf(defaultStream::output_stream(),
3093 "-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value);
3094 return JNI_EINVAL;
3095 }
3096
3097 if (!add_property(tail)) {
3098 return JNI_ENOMEM;
3099 }
3100 // Out of the box management support
3101 if (match_option(option, "-Dcom.sun.management", &tail)) {
3102 #if INCLUDE_MANAGEMENT
3103 if (FLAG_SET_CMDLINE(bool, ManagementServer, true) != Flag::SUCCESS) {
3104 return JNI_EINVAL;
3105 }
3106 #else
3107 jio_fprintf(defaultStream::output_stream(),
3108 "-Dcom.sun.management is not supported in this VM.\n");
3109 return JNI_ERR;
3110 #endif
3111 }
3112 // -Xint
3113 } else if (match_option(option, "-Xint")) {
3114 set_mode_flags(_int);
3115 // -Xmixed
3116 } else if (match_option(option, "-Xmixed")) {
3117 set_mode_flags(_mixed);
3118 // -Xcomp
3119 } else if (match_option(option, "-Xcomp")) {
3120 // for testing the compiler; turn off all flags that inhibit compilation
3121 set_mode_flags(_comp);
3122 // -Xshare:dump
3123 } else if (match_option(option, "-Xshare:dump")) {
3124 if (FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true) != Flag::SUCCESS) {
3125 return JNI_EINVAL;
3126 }
3127 set_mode_flags(_int); // Prevent compilation, which creates objects
3128 // -Xshare:on
3129 } else if (match_option(option, "-Xshare:on")) {
3130 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
3131 return JNI_EINVAL;
3132 }
3133 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
3134 return JNI_EINVAL;
3135 }
3136 // -Xshare:auto
3137 } else if (match_option(option, "-Xshare:auto")) {
3138 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
3139 return JNI_EINVAL;
3140 }
3141 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
3142 return JNI_EINVAL;
3143 }
3144 // -Xshare:off
3145 } else if (match_option(option, "-Xshare:off")) {
3146 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, false) != Flag::SUCCESS) {
3147 return JNI_EINVAL;
3148 }
3149 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
3150 return JNI_EINVAL;
3151 }
3152 // -Xverify
3153 } else if (match_option(option, "-Xverify", &tail)) {
3154 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) {
3155 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true) != Flag::SUCCESS) {
3156 return JNI_EINVAL;
3157 }
3158 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
3159 return JNI_EINVAL;
3160 }
3161 } else if (strcmp(tail, ":remote") == 0) {
3162 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
3163 return JNI_EINVAL;
3164 }
3165 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
3166 return JNI_EINVAL;
3167 }
3168 } else if (strcmp(tail, ":none") == 0) {
3169 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
3170 return JNI_EINVAL;
3171 }
3172 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false) != Flag::SUCCESS) {
3173 return JNI_EINVAL;
3174 }
3175 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) {
3176 return JNI_EINVAL;
3177 }
3178 // -Xdebug
3179 } else if (match_option(option, "-Xdebug")) {
3180 // note this flag has been used, then ignore
3181 set_xdebug_mode(true);
3182 // -Xnoagent
3183 } else if (match_option(option, "-Xnoagent")) {
3184 // For compatibility with classic. HotSpot refuses to load the old style agent.dll.
3185 } else if (match_option(option, "-Xloggc:", &tail)) {
3186 // Redirect GC output to the file. -Xloggc:<filename>
3187 // ostream_init_log(), when called will use this filename
3188 // to initialize a fileStream.
3189 _gc_log_filename = os::strdup_check_oom(tail);
3190 if (!is_filename_valid(_gc_log_filename)) {
3191 jio_fprintf(defaultStream::output_stream(),
3192 "Invalid file name for use with -Xloggc: Filename can only contain the "
3193 "characters [A-Z][a-z][0-9]-_.%%[p|t] but it has been %s\n"
3194 "Note %%p or %%t can only be used once\n", _gc_log_filename);
3195 return JNI_EINVAL;
3196 }
3197 if (FLAG_SET_CMDLINE(bool, PrintGC, true) != Flag::SUCCESS) {
3198 return JNI_EINVAL;
3199 }
3200 if (FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true) != Flag::SUCCESS) {
3201 return JNI_EINVAL;
3202 }
3203 } else if (match_option(option, "-Xlog", &tail)) {
3204 bool ret = false;
3205 if (strcmp(tail, ":help") == 0) {
3206 LogConfiguration::print_command_line_help(defaultStream::output_stream());
3207 vm_exit(0);
3208 } else if (strcmp(tail, ":disable") == 0) {
3209 LogConfiguration::disable_logging();
3210 ret = true;
3211 } else if (*tail == '\0') {
3212 ret = LogConfiguration::parse_command_line_arguments();
3213 assert(ret, "-Xlog without arguments should never fail to parse");
3214 } else if (*tail == ':') {
3215 ret = LogConfiguration::parse_command_line_arguments(tail + 1);
3216 }
3217 if (ret == false) {
3218 jio_fprintf(defaultStream::error_stream(),
3219 "Invalid -Xlog option '-Xlog%s'\n",
3220 tail);
3221 return JNI_EINVAL;
3222 }
3223 // JNI hooks
3224 } else if (match_option(option, "-Xcheck", &tail)) {
3225 if (!strcmp(tail, ":jni")) {
3226 #if !INCLUDE_JNI_CHECK
3227 warning("JNI CHECKING is not supported in this VM");
3228 #else
3229 CheckJNICalls = true;
3230 #endif // INCLUDE_JNI_CHECK
3231 } else if (is_bad_option(option, args->ignoreUnrecognized,
3232 "check")) {
3233 return JNI_EINVAL;
3234 }
3235 } else if (match_option(option, "vfprintf")) {
3236 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo);
3237 } else if (match_option(option, "exit")) {
3238 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo);
3239 } else if (match_option(option, "abort")) {
3240 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo);
3241 // -XX:+AggressiveHeap
3242 } else if (match_option(option, "-XX:+AggressiveHeap")) {
3243 jint result = set_aggressive_heap_flags();
3244 if (result != JNI_OK) {
3245 return result;
3246 }
3247 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure;
3248 // and the last option wins.
3249 } else if (match_option(option, "-XX:+NeverTenure")) {
3250 if (FLAG_SET_CMDLINE(bool, NeverTenure, true) != Flag::SUCCESS) {
3251 return JNI_EINVAL;
3252 }
3253 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
3254 return JNI_EINVAL;
3255 }
3256 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1) != Flag::SUCCESS) {
3257 return JNI_EINVAL;
3258 }
3259 } else if (match_option(option, "-XX:+AlwaysTenure")) {
3260 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3261 return JNI_EINVAL;
3262 }
3263 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
3264 return JNI_EINVAL;
3265 }
3266 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0) != Flag::SUCCESS) {
3267 return JNI_EINVAL;
3268 }
3269 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) {
3270 uintx max_tenuring_thresh = 0;
3271 if (!parse_uintx(tail, &max_tenuring_thresh, 0)) {
3272 jio_fprintf(defaultStream::error_stream(),
3273 "Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail);
3274 return JNI_EINVAL;
3275 }
3276
3277 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh) != Flag::SUCCESS) {
3278 return JNI_EINVAL;
3279 }
3280
3281 if (MaxTenuringThreshold == 0) {
3282 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3283 return JNI_EINVAL;
3284 }
3285 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
3286 return JNI_EINVAL;
3287 }
3288 } else {
3289 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3290 return JNI_EINVAL;
3291 }
3292 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
3293 return JNI_EINVAL;
3294 }
3295 }
3296 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) {
3297 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false) != Flag::SUCCESS) {
3298 return JNI_EINVAL;
3299 }
3300 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true) != Flag::SUCCESS) {
3301 return JNI_EINVAL;
3302 }
3303 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) {
3304 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false) != Flag::SUCCESS) {
3305 return JNI_EINVAL;
3306 }
3307 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true) != Flag::SUCCESS) {
3308 return JNI_EINVAL;
3309 }
3310 } else if (match_option(option, "-XX:+ExtendedDTraceProbes")) {
3311 #if defined(DTRACE_ENABLED)
3312 if (FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true) != Flag::SUCCESS) {
3313 return JNI_EINVAL;
3314 }
3315 if (FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true) != Flag::SUCCESS) {
3316 return JNI_EINVAL;
3317 }
3318 if (FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true) != Flag::SUCCESS) {
3319 return JNI_EINVAL;
3320 }
3321 if (FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true) != Flag::SUCCESS) {
3322 return JNI_EINVAL;
3323 }
3324 #else // defined(DTRACE_ENABLED)
3325 jio_fprintf(defaultStream::error_stream(),
3326 "ExtendedDTraceProbes flag is not applicable for this configuration\n");
3327 return JNI_EINVAL;
3328 #endif // defined(DTRACE_ENABLED)
3329 #ifdef ASSERT
3330 } else if (match_option(option, "-XX:+FullGCALot")) {
3331 if (FLAG_SET_CMDLINE(bool, FullGCALot, true) != Flag::SUCCESS) {
3332 return JNI_EINVAL;
3333 }
3334 // disable scavenge before parallel mark-compact
3335 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
3336 return JNI_EINVAL;
3337 }
3338 #endif
3339 #if !INCLUDE_MANAGEMENT
3340 } else if (match_option(option, "-XX:+ManagementServer")) {
3341 jio_fprintf(defaultStream::error_stream(),
3342 "ManagementServer is not supported in this VM.\n");
3343 return JNI_ERR;
3344 #endif // INCLUDE_MANAGEMENT
3345 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx
3346 // Skip -XX:Flags= and -XX:VMOptionsFile= since those cases have
3347 // already been handled
3348 if ((strncmp(tail, "Flags=", strlen("Flags=")) != 0) &&
3349 (strncmp(tail, "VMOptionsFile=", strlen("VMOptionsFile=")) != 0)) {
3350 if (!process_argument(tail, args->ignoreUnrecognized, origin)) {
3351 return JNI_EINVAL;
3352 }
3353 }
3354 // Unknown option
3355 } else if (is_bad_option(option, args->ignoreUnrecognized)) {
3356 return JNI_ERR;
3357 }
3358 }
3359
3360 // PrintSharedArchiveAndExit will turn on
3361 // -Xshare:on
3362 // -XX:+TraceClassPaths
3363 if (PrintSharedArchiveAndExit) {
3364 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
3365 return JNI_EINVAL;
3366 }
3367 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
3368 return JNI_EINVAL;
3369 }
3370 if (FLAG_SET_CMDLINE(bool, TraceClassPaths, true) != Flag::SUCCESS) {
3371 return JNI_EINVAL;
3372 }
3373 }
3374
3375 // Change the default value for flags which have different default values
3376 // when working with older JDKs.
3377 #ifdef LINUX
3378 if (JDK_Version::current().compare_major(6) <= 0 &&
3379 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) {
3380 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false);
3381 }
3382 #endif // LINUX
3383 fix_appclasspath();
3384 return JNI_OK;
3385 }
3386
3387 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled)
3388 //
3389 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar
3390 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar".
3391 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty
3392 // path is treated as the current directory.
3393 //
3394 // This causes problems with CDS, which requires that all directories specified in the classpath
3395 // must be empty. In most cases, applications do NOT want to load classes from the current
3396 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up
3397 // scripts compatible with CDS.
3398 void Arguments::fix_appclasspath() {
3399 if (IgnoreEmptyClassPaths) {
3400 const char separator = *os::path_separator();
3401 const char* src = _java_class_path->value();
3402
3403 // skip over all the leading empty paths
3404 while (*src == separator) {
3405 src ++;
3406 }
3407
3408 char* copy = os::strdup_check_oom(src, mtInternal);
3409
3410 // trim all trailing empty paths
3411 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) {
3412 *tail = '\0';
3413 }
3414
3415 char from[3] = {separator, separator, '\0'};
3416 char to [2] = {separator, '\0'};
3417 while (StringUtils::replace_no_expand(copy, from, to) > 0) {
3418 // Keep replacing "::" -> ":" until we have no more "::" (non-windows)
3419 // Keep replacing ";;" -> ";" until we have no more ";;" (windows)
3420 }
3421
3422 _java_class_path->set_value(copy);
3423 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore
3424 }
3425
3426 if (!PrintSharedArchiveAndExit) {
3427 ClassLoader::trace_class_path("[classpath: ", _java_class_path->value());
3428 }
3429 }
3430
3431 static bool has_jar_files(const char* directory) {
3432 DIR* dir = os::opendir(directory);
3433 if (dir == NULL) return false;
3434
3435 struct dirent *entry;
3436 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtInternal);
3437 bool hasJarFile = false;
3438 while (!hasJarFile && (entry = os::readdir(dir, (dirent *) dbuf)) != NULL) {
3439 const char* name = entry->d_name;
3440 const char* ext = name + strlen(name) - 4;
3441 hasJarFile = ext > name && (os::file_name_strcmp(ext, ".jar") == 0);
3442 }
3443 FREE_C_HEAP_ARRAY(char, dbuf);
3444 os::closedir(dir);
3445 return hasJarFile ;
3446 }
3447
3448 static int check_non_empty_dirs(const char* path) {
3449 const char separator = *os::path_separator();
3450 const char* const end = path + strlen(path);
3451 int nonEmptyDirs = 0;
3452 while (path < end) {
3453 const char* tmp_end = strchr(path, separator);
3454 if (tmp_end == NULL) {
3455 if (has_jar_files(path)) {
3456 nonEmptyDirs++;
3457 jio_fprintf(defaultStream::output_stream(),
3458 "Non-empty directory: %s\n", path);
3459 }
3460 path = end;
3461 } else {
3462 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1, mtInternal);
3463 memcpy(dirpath, path, tmp_end - path);
3464 dirpath[tmp_end - path] = '\0';
3465 if (has_jar_files(dirpath)) {
3466 nonEmptyDirs++;
3467 jio_fprintf(defaultStream::output_stream(),
3468 "Non-empty directory: %s\n", dirpath);
3469 }
3470 FREE_C_HEAP_ARRAY(char, dirpath);
3471 path = tmp_end + 1;
3472 }
3473 }
3474 return nonEmptyDirs;
3475 }
3476
3477 jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) {
3478 // check if the default lib/endorsed directory exists; if so, error
3479 char path[JVM_MAXPATHLEN];
3480 const char* fileSep = os::file_separator();
3481 sprintf(path, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep);
3482
3483 #if INCLUDE_JVMCI
3484 if (EnableJVMCI) {
3485 JVMCIRuntime::save_options(_system_properties);
3486 }
3487 #endif // INCLUDE_JVMCI
3488
3489 if (CheckEndorsedAndExtDirs) {
3490 int nonEmptyDirs = 0;
3491 // check endorsed directory
3492 nonEmptyDirs += check_non_empty_dirs(path);
3493 // check the extension directories
3494 nonEmptyDirs += check_non_empty_dirs(Arguments::get_ext_dirs());
3495 if (nonEmptyDirs > 0) {
3496 return JNI_ERR;
3497 }
3498 }
3499
3500 DIR* dir = os::opendir(path);
3501 if (dir != NULL) {
3502 jio_fprintf(defaultStream::output_stream(),
3503 "<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n"
3504 "in modular form will be supported via the concept of upgradeable modules.\n");
3505 os::closedir(dir);
3506 return JNI_ERR;
3507 }
3508
3509 sprintf(path, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep);
3510 dir = os::opendir(path);
3511 if (dir != NULL) {
3512 jio_fprintf(defaultStream::output_stream(),
3513 "<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; "
3514 "Use -classpath instead.\n.");
3515 os::closedir(dir);
3516 return JNI_ERR;
3517 }
3518
3519 if (scp_assembly_required) {
3520 // Assemble the bootclasspath elements into the final path.
3521 char *combined_path = scp_p->combined_path();
3522 Arguments::set_sysclasspath(combined_path);
3523 FREE_C_HEAP_ARRAY(char, combined_path);
3524 }
3525
3526 // This must be done after all arguments have been processed.
3527 // java_compiler() true means set to "NONE" or empty.
3528 if (java_compiler() && !xdebug_mode()) {
3529 // For backwards compatibility, we switch to interpreted mode if
3530 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was
3531 // not specified.
3532 set_mode_flags(_int);
3533 }
3534
3535 // CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode),
3536 // but like -Xint, leave compilation thresholds unaffected.
3537 // With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well.
3538 if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) {
3539 set_mode_flags(_int);
3540 }
3541
3542 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set
3543 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) {
3544 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold);
3545 }
3546
3547 #if !defined(COMPILER2) && !INCLUDE_JVMCI
3548 // Don't degrade server performance for footprint
3549 if (FLAG_IS_DEFAULT(UseLargePages) &&
3550 MaxHeapSize < LargePageHeapSizeThreshold) {
3551 // No need for large granularity pages w/small heaps.
3552 // Note that large pages are enabled/disabled for both the
3553 // Java heap and the code cache.
3554 FLAG_SET_DEFAULT(UseLargePages, false);
3555 }
3556
3557 #elif defined(COMPILER2)
3558 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) {
3559 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1);
3560 }
3561 #endif
3562
3563 #ifndef TIERED
3564 // Tiered compilation is undefined.
3565 UNSUPPORTED_OPTION(TieredCompilation, "TieredCompilation");
3566 #endif
3567
3568 // If we are running in a headless jre, force java.awt.headless property
3569 // to be true unless the property has already been set.
3570 // Also allow the OS environment variable JAVA_AWT_HEADLESS to set headless state.
3571 if (os::is_headless_jre()) {
3572 const char* headless = Arguments::get_property("java.awt.headless");
3573 if (headless == NULL) {
3574 const char *headless_env = ::getenv("JAVA_AWT_HEADLESS");
3575 if (headless_env == NULL) {
3576 if (!add_property("java.awt.headless=true")) {
3577 return JNI_ENOMEM;
3578 }
3579 } else {
3580 char buffer[256];
3581 jio_snprintf(buffer, sizeof(buffer), "java.awt.headless=%s", headless_env);
3582 if (!add_property(buffer)) {
3583 return JNI_ENOMEM;
3584 }
3585 }
3586 }
3587 }
3588
3589 if (UseConcMarkSweepGC && FLAG_IS_DEFAULT(UseParNewGC) && !UseParNewGC) {
3590 // CMS can only be used with ParNew
3591 FLAG_SET_ERGO(bool, UseParNewGC, true);
3592 }
3593
3594 if (!check_vm_args_consistency()) {
3595 return JNI_ERR;
3596 }
3597
3598 return JNI_OK;
3599 }
3600
3601 // Helper class for controlling the lifetime of JavaVMInitArgs
3602 // objects. The contents of the JavaVMInitArgs are guaranteed to be
3603 // deleted on the destruction of the ScopedVMInitArgs object.
3604 class ScopedVMInitArgs : public StackObj {
3605 private:
3606 JavaVMInitArgs _args;
3607 bool _is_set;
3608
3609 public:
3610 ScopedVMInitArgs() {
3611 _args.version = JNI_VERSION_1_2;
3612 _args.nOptions = 0;
3613 _args.options = NULL;
3614 _args.ignoreUnrecognized = false;
3615 _is_set = false;
3616 }
3617
3618 // Populates the JavaVMInitArgs object represented by this
3619 // ScopedVMInitArgs object with the arguments in options. The
3620 // allocated memory is deleted by the destructor. If this method
3621 // returns anything other than JNI_OK, then this object is in a
3622 // partially constructed state, and should be abandoned.
3623 jint set_args(GrowableArray<JavaVMOption>* options) {
3624 _is_set = true;
3625 JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL(
3626 JavaVMOption, options->length(), mtInternal);
3627 if (options_arr == NULL) {
3628 return JNI_ENOMEM;
3629 }
3630 _args.options = options_arr;
3631
3632 for (int i = 0; i < options->length(); i++) {
3633 options_arr[i] = options->at(i);
3634 options_arr[i].optionString = os::strdup(options_arr[i].optionString);
3635 if (options_arr[i].optionString == NULL) {
3636 // Rely on the destructor to do cleanup.
3637 _args.nOptions = i;
3638 return JNI_ENOMEM;
3639 }
3640 }
3641
3642 _args.nOptions = options->length();
3643 _args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions;
3644 return JNI_OK;
3645 }
3646
3647 JavaVMInitArgs* get() { return &_args; }
3648 bool is_set() { return _is_set; }
3649
3650 ~ScopedVMInitArgs() {
3651 if (_args.options == NULL) return;
3652 for (int i = 0; i < _args.nOptions; i++) {
3653 os::free(_args.options[i].optionString);
3654 }
3655 FREE_C_HEAP_ARRAY(JavaVMOption, _args.options);
3656 }
3657
3658 // Insert options into this option list, to replace option at
3659 // vm_options_file_pos (-XX:VMOptionsFile)
3660 jint insert(const JavaVMInitArgs* args,
3661 const JavaVMInitArgs* args_to_insert,
3662 const int vm_options_file_pos) {
3663 assert(_args.options == NULL, "shouldn't be set yet");
3664 assert(args_to_insert->nOptions != 0, "there should be args to insert");
3665 assert(vm_options_file_pos != -1, "vm_options_file_pos should be set");
3666
3667 int length = args->nOptions + args_to_insert->nOptions - 1;
3668 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtInternal)
3669 GrowableArray<JavaVMOption>(length, true); // Construct new option array
3670 for (int i = 0; i < args->nOptions; i++) {
3671 if (i == vm_options_file_pos) {
3672 // insert the new options starting at the same place as the
3673 // -XX:VMOptionsFile option
3674 for (int j = 0; j < args_to_insert->nOptions; j++) {
3675 options->push(args_to_insert->options[j]);
3676 }
3677 } else {
3678 options->push(args->options[i]);
3679 }
3680 }
3681 // make into options array
3682 jint result = set_args(options);
3683 delete options;
3684 return result;
3685 }
3686 };
3687
3688 jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) {
3689 return parse_options_environment_variable("_JAVA_OPTIONS", args);
3690 }
3691
3692 jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) {
3693 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args);
3694 }
3695
3696 jint Arguments::parse_options_environment_variable(const char* name,
3697 ScopedVMInitArgs* vm_args) {
3698 char *buffer = ::getenv(name);
3699
3700 // Don't check this environment variable if user has special privileges
3701 // (e.g. unix su command).
3702 if (buffer == NULL || os::have_special_privileges()) {
3703 return JNI_OK;
3704 }
3705
3706 if ((buffer = os::strdup(buffer)) == NULL) {
3707 return JNI_ENOMEM;
3708 }
3709
3710 int retcode = parse_options_buffer(name, buffer, strlen(buffer), vm_args);
3711
3712 os::free(buffer);
3713 return retcode;
3714 }
3715
3716 jint Arguments::parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args) {
3717 // read file into buffer
3718 int fd = ::open(file_name, O_RDONLY);
3719 if (fd < 0) {
3720 jio_fprintf(defaultStream::error_stream(),
3721 "Could not open options file '%s'\n",
3722 file_name);
3723 return JNI_ERR;
3724 }
3725
3726 struct stat stbuf;
3727 int retcode = os::stat(file_name, &stbuf);
3728 if (retcode != 0) {
3729 jio_fprintf(defaultStream::error_stream(),
3730 "Could not stat options file '%s'\n",
3731 file_name);
3732 os::close(fd);
3733 return JNI_ERR;
3734 }
3735
3736 if (stbuf.st_size == 0) {
3737 // tell caller there is no option data and that is ok
3738 os::close(fd);
3739 return JNI_OK;
3740 }
3741
3742 // '+ 1' for NULL termination even with max bytes
3743 size_t bytes_alloc = stbuf.st_size + 1;
3744
3745 char *buf = NEW_C_HEAP_ARRAY_RETURN_NULL(char, bytes_alloc, mtInternal);
3746 if (NULL == buf) {
3747 jio_fprintf(defaultStream::error_stream(),
3748 "Could not allocate read buffer for options file parse\n");
3749 os::close(fd);
3750 return JNI_ENOMEM;
3751 }
3752
3753 memset(buf, 0, bytes_alloc);
3754
3755 // Fill buffer
3756 // Use ::read() instead of os::read because os::read()
3757 // might do a thread state transition
3758 // and it is too early for that here
3759
3760 ssize_t bytes_read = ::read(fd, (void *)buf, (unsigned)bytes_alloc);
3761 os::close(fd);
3762 if (bytes_read < 0) {
3763 FREE_C_HEAP_ARRAY(char, buf);
3764 jio_fprintf(defaultStream::error_stream(),
3765 "Could not read options file '%s'\n", file_name);
3766 return JNI_ERR;
3767 }
3768
3769 if (bytes_read == 0) {
3770 // tell caller there is no option data and that is ok
3771 FREE_C_HEAP_ARRAY(char, buf);
3772 return JNI_OK;
3773 }
3774
3775 retcode = parse_options_buffer(file_name, buf, bytes_read, vm_args);
3776
3777 FREE_C_HEAP_ARRAY(char, buf);
3778 return retcode;
3779 }
3780
3781 jint Arguments::parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args) {
3782 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JavaVMOption>(2, true); // Construct option array
3783
3784 // some pointers to help with parsing
3785 char *buffer_end = buffer + buf_len;
3786 char *opt_hd = buffer;
3787 char *wrt = buffer;
3788 char *rd = buffer;
3789
3790 // parse all options
3791 while (rd < buffer_end) {
3792 // skip leading white space from the input string
3793 while (rd < buffer_end && isspace(*rd)) {
3794 rd++;
3795 }
3796
3797 if (rd >= buffer_end) {
3798 break;
3799 }
3800
3801 // Remember this is where we found the head of the token.
3802 opt_hd = wrt;
3803
3804 // Tokens are strings of non white space characters separated
3805 // by one or more white spaces.
3806 while (rd < buffer_end && !isspace(*rd)) {
3807 if (*rd == '\'' || *rd == '"') { // handle a quoted string
3808 int quote = *rd; // matching quote to look for
3809 rd++; // don't copy open quote
3810 while (rd < buffer_end && *rd != quote) {
3811 // include everything (even spaces)
3812 // up until the close quote
3813 *wrt++ = *rd++; // copy to option string
3814 }
3815
3816 if (rd < buffer_end) {
3817 rd++; // don't copy close quote
3818 } else {
3819 // did not see closing quote
3820 jio_fprintf(defaultStream::error_stream(),
3821 "Unmatched quote in %s\n", name);
3822 delete options;
3823 return JNI_ERR;
3824 }
3825 } else {
3826 *wrt++ = *rd++; // copy to option string
3827 }
3828 }
3829
3830 // steal a white space character and set it to NULL
3831 *wrt++ = '\0';
3832 // We now have a complete token
3833
3834 JavaVMOption option;
3835 option.optionString = opt_hd;
3836
3837 options->append(option); // Fill in option
3838
3839 rd++; // Advance to next character
3840 }
3841
3842 // Fill out JavaVMInitArgs structure.
3843 jint status = vm_args->set_args(options);
3844
3845 delete options;
3846 return status;
3847 }
3848
3849 void Arguments::set_shared_spaces_flags() {
3850 if (DumpSharedSpaces) {
3851 if (RequireSharedSpaces) {
3852 warning("Cannot dump shared archive while using shared archive");
3853 }
3854 UseSharedSpaces = false;
3855 #ifdef _LP64
3856 if (!UseCompressedOops || !UseCompressedClassPointers) {
3857 vm_exit_during_initialization(
3858 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL);
3859 }
3860 } else {
3861 if (!UseCompressedOops || !UseCompressedClassPointers) {
3862 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces.");
3863 }
3864 #endif
3865 }
3866 }
3867
3868 #if !INCLUDE_ALL_GCS
3869 static void force_serial_gc() {
3870 FLAG_SET_DEFAULT(UseSerialGC, true);
3871 UNSUPPORTED_GC_OPTION(UseG1GC);
3872 UNSUPPORTED_GC_OPTION(UseParallelGC);
3873 UNSUPPORTED_GC_OPTION(UseParallelOldGC);
3874 UNSUPPORTED_GC_OPTION(UseConcMarkSweepGC);
3875 UNSUPPORTED_GC_OPTION(UseParNewGC);
3876 }
3877 #endif // INCLUDE_ALL_GCS
3878
3879 // Sharing support
3880 // Construct the path to the archive
3881 static char* get_shared_archive_path() {
3882 char *shared_archive_path;
3883 if (SharedArchiveFile == NULL) {
3884 char jvm_path[JVM_MAXPATHLEN];
3885 os::jvm_path(jvm_path, sizeof(jvm_path));
3886 char *end = strrchr(jvm_path, *os::file_separator());
3887 if (end != NULL) *end = '\0';
3888 size_t jvm_path_len = strlen(jvm_path);
3889 size_t file_sep_len = strlen(os::file_separator());
3890 const size_t len = jvm_path_len + file_sep_len + 20;
3891 shared_archive_path = NEW_C_HEAP_ARRAY(char, len, mtInternal);
3892 if (shared_archive_path != NULL) {
3893 jio_snprintf(shared_archive_path, len, "%s%sclasses.jsa",
3894 jvm_path, os::file_separator());
3895 }
3896 } else {
3897 shared_archive_path = os::strdup_check_oom(SharedArchiveFile, mtInternal);
3898 }
3899 return shared_archive_path;
3900 }
3901
3902 #ifndef PRODUCT
3903 // Determine whether LogVMOutput should be implicitly turned on.
3904 static bool use_vm_log() {
3905 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) ||
3906 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods ||
3907 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers ||
3908 PrintAssembly || TraceDeoptimization || TraceDependencies ||
3909 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) {
3910 return true;
3911 }
3912
3913 #ifdef COMPILER1
3914 if (PrintC1Statistics) {
3915 return true;
3916 }
3917 #endif // COMPILER1
3918
3919 #ifdef COMPILER2
3920 if (PrintOptoAssembly || PrintOptoStatistics) {
3921 return true;
3922 }
3923 #endif // COMPILER2
3924
3925 return false;
3926 }
3927
3928 #endif // PRODUCT
3929
3930 jint Arguments::insert_vm_options_file(const JavaVMInitArgs* args,
3931 char** flags_file,
3932 char** vm_options_file,
3933 const int vm_options_file_pos,
3934 ScopedVMInitArgs *vm_options_file_args,
3935 ScopedVMInitArgs* args_out) {
3936 jint code = parse_vm_options_file(*vm_options_file, vm_options_file_args);
3937 if (code != JNI_OK) {
3938 return code;
3939 }
3940
3941 if (vm_options_file_args->get()->nOptions < 1) {
3942 return JNI_OK;
3943 }
3944
3945 return args_out->insert(args, vm_options_file_args->get(),
3946 vm_options_file_pos);
3947 }
3948
3949 jint Arguments::match_special_option_and_act(const JavaVMInitArgs* args,
3950 char ** flags_file,
3951 char ** vm_options_file,
3952 ScopedVMInitArgs* vm_options_file_args,
3953 ScopedVMInitArgs* args_out) {
3954 // Remaining part of option string
3955 const char* tail;
3956 int vm_options_file_pos = -1;
3957
3958 for (int index = 0; index < args->nOptions; index++) {
3959 const JavaVMOption* option = args->options + index;
3960 if (ArgumentsExt::process_options(option)) {
3961 continue;
3962 }
3963 if (match_option(option, "-XX:Flags=", &tail)) {
3964 *flags_file = (char *) tail;
3965 if (*flags_file == NULL) {
3966 jio_fprintf(defaultStream::error_stream(),
3967 "Cannot copy flags_file name.\n");
3968 return JNI_ENOMEM;
3969 }
3970 continue;
3971 }
3972 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
3973 if (vm_options_file != NULL) {
3974 // The caller accepts -XX:VMOptionsFile
3975 if (*vm_options_file != NULL) {
3976 jio_fprintf(defaultStream::error_stream(),
3977 "The VM Options file can only be specified once and "
3978 "only on the command line.\n");
3979 return JNI_EINVAL;
3980 }
3981
3982 *vm_options_file = (char *) tail;
3983 vm_options_file_pos = index; // save position of -XX:VMOptionsFile
3984 // If there's a VMOptionsFile, parse that (also can set flags_file)
3985 jint code = insert_vm_options_file(args, flags_file, vm_options_file,
3986 vm_options_file_pos,
3987 vm_options_file_args, args_out);
3988 if (code != JNI_OK) {
3989 return code;
3990 }
3991 if (args_out->is_set()) {
3992 // The VMOptions file inserted some options so switch 'args'
3993 // to the new set of options, and continue processing which
3994 // preserves "last option wins" semantics.
3995 args = args_out->get();
3996 // The first option from the VMOptionsFile replaces the
3997 // current option. So we back track to process the
3998 // replacement option.
3999 index--;
4000 }
4001 } else {
4002 jio_fprintf(defaultStream::error_stream(),
4003 "VM options file is only supported on the command line\n");
4004 return JNI_EINVAL;
4005 }
4006 continue;
4007 }
4008 if (match_option(option, "-XX:+PrintVMOptions")) {
4009 PrintVMOptions = true;
4010 continue;
4011 }
4012 if (match_option(option, "-XX:-PrintVMOptions")) {
4013 PrintVMOptions = false;
4014 continue;
4015 }
4016 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) {
4017 IgnoreUnrecognizedVMOptions = true;
4018 continue;
4019 }
4020 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) {
4021 IgnoreUnrecognizedVMOptions = false;
4022 continue;
4023 }
4024 if (match_option(option, "-XX:+PrintFlagsInitial")) {
4025 CommandLineFlags::printFlags(tty, false);
4026 vm_exit(0);
4027 }
4028 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) {
4029 #if INCLUDE_NMT
4030 // The launcher did not setup nmt environment variable properly.
4031 if (!MemTracker::check_launcher_nmt_support(tail)) {
4032 warning("Native Memory Tracking did not setup properly, using wrong launcher?");
4033 }
4034
4035 // Verify if nmt option is valid.
4036 if (MemTracker::verify_nmt_option()) {
4037 // Late initialization, still in single-threaded mode.
4038 if (MemTracker::tracking_level() >= NMT_summary) {
4039 MemTracker::init();
4040 }
4041 } else {
4042 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL);
4043 }
4044 continue;
4045 #else
4046 jio_fprintf(defaultStream::error_stream(),
4047 "Native Memory Tracking is not supported in this VM\n");
4048 return JNI_ERR;
4049 #endif
4050 }
4051
4052 #ifndef PRODUCT
4053 if (match_option(option, "-XX:+PrintFlagsWithComments")) {
4054 CommandLineFlags::printFlags(tty, true);
4055 vm_exit(0);
4056 }
4057 #endif
4058 }
4059 return JNI_OK;
4060 }
4061
4062 static void print_options(const JavaVMInitArgs *args) {
4063 const char* tail;
4064 for (int index = 0; index < args->nOptions; index++) {
4065 const JavaVMOption *option = args->options + index;
4066 if (match_option(option, "-XX:", &tail)) {
4067 logOption(tail);
4068 }
4069 }
4070 }
4071
4072 // Parse entry point called from JNI_CreateJavaVM
4073
4074 jint Arguments::parse(const JavaVMInitArgs* args) {
4075 assert(verify_special_jvm_flags(), "deprecated and obsolete flag table inconsistent");
4076
4077 // Initialize ranges and constraints
4078 CommandLineFlagRangeList::init();
4079 CommandLineFlagConstraintList::init();
4080
4081 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed.
4082 const char* hotspotrc = ".hotspotrc";
4083 char* flags_file = NULL;
4084 char* vm_options_file = NULL;
4085 bool settings_file_specified = false;
4086 bool needs_hotspotrc_warning = false;
4087 ScopedVMInitArgs java_tool_options_args;
4088 ScopedVMInitArgs java_options_args;
4089 ScopedVMInitArgs modified_cmd_line_args;
4090 // Pass in vm_options_file_args to keep memory for flags_file from being
4091 // deallocated if found in the vm options file.
4092 ScopedVMInitArgs vm_options_file_args;
4093
4094 jint code =
4095 parse_java_tool_options_environment_variable(&java_tool_options_args);
4096 if (code != JNI_OK) {
4097 return code;
4098 }
4099
4100 code = parse_java_options_environment_variable(&java_options_args);
4101 if (code != JNI_OK) {
4102 return code;
4103 }
4104
4105 code = match_special_option_and_act(java_tool_options_args.get(),
4106 &flags_file, NULL, NULL, NULL);
4107 if (code != JNI_OK) {
4108 return code;
4109 }
4110
4111 code = match_special_option_and_act(args, &flags_file, &vm_options_file,
4112 &vm_options_file_args,
4113 &modified_cmd_line_args);
4114 if (code != JNI_OK) {
4115 return code;
4116 }
4117
4118
4119 // The command line arguments have been modified to include VMOptionsFile arguments.
4120 if (modified_cmd_line_args.is_set()) {
4121 args = modified_cmd_line_args.get();
4122 }
4123
4124 code = match_special_option_and_act(java_options_args.get(), &flags_file,
4125 NULL, NULL, NULL);
4126 if (code != JNI_OK) {
4127 return code;
4128 }
4129
4130 settings_file_specified = (flags_file != NULL);
4131
4132 if (IgnoreUnrecognizedVMOptions) {
4133 // uncast const to modify the flag args->ignoreUnrecognized
4134 *(jboolean*)(&args->ignoreUnrecognized) = true;
4135 java_tool_options_args.get()->ignoreUnrecognized = true;
4136 java_options_args.get()->ignoreUnrecognized = true;
4137 }
4138
4139 // Parse specified settings file
4140 if (settings_file_specified) {
4141 if (!process_settings_file(flags_file, true, args->ignoreUnrecognized)) {
4142 return JNI_EINVAL;
4143 }
4144 } else {
4145 #ifdef ASSERT
4146 // Parse default .hotspotrc settings file
4147 if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) {
4148 return JNI_EINVAL;
4149 }
4150 #else
4151 struct stat buf;
4152 if (os::stat(hotspotrc, &buf) == 0) {
4153 needs_hotspotrc_warning = true;
4154 }
4155 #endif
4156 }
4157
4158 if (PrintVMOptions) {
4159 print_options(java_tool_options_args.get());
4160 print_options(args);
4161 print_options(java_options_args.get());
4162 }
4163
4164 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS
4165 jint result = parse_vm_init_args(java_tool_options_args.get(),
4166 java_options_args.get(),
4167 args); // command line arguments
4168
4169 if (result != JNI_OK) {
4170 return result;
4171 }
4172
4173 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed.
4174 SharedArchivePath = get_shared_archive_path();
4175 if (SharedArchivePath == NULL) {
4176 return JNI_ENOMEM;
4177 }
4178
4179 // Set up VerifySharedSpaces
4180 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) {
4181 VerifySharedSpaces = true;
4182 }
4183
4184 // Delay warning until here so that we've had a chance to process
4185 // the -XX:-PrintWarnings flag
4186 if (needs_hotspotrc_warning) {
4187 warning("%s file is present but has been ignored. "
4188 "Run with -XX:Flags=%s to load the file.",
4189 hotspotrc, hotspotrc);
4190 }
4191
4192 #if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
4193 UNSUPPORTED_OPTION(UseLargePages, "-XX:+UseLargePages");
4194 #endif
4195
4196 ArgumentsExt::report_unsupported_options();
4197
4198 #ifndef PRODUCT
4199 if (TraceBytecodesAt != 0) {
4200 TraceBytecodes = true;
4201 }
4202 if (CountCompiledCalls) {
4203 if (UseCounterDecay) {
4204 warning("UseCounterDecay disabled because CountCalls is set");
4205 UseCounterDecay = false;
4206 }
4207 }
4208 #endif // PRODUCT
4209
4210 if (ScavengeRootsInCode == 0) {
4211 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) {
4212 warning("Forcing ScavengeRootsInCode non-zero");
4213 }
4214 ScavengeRootsInCode = 1;
4215 }
4216
4217 if (PrintGCDetails) {
4218 // Turn on -verbose:gc options as well
4219 PrintGC = true;
4220 }
4221
4222 // Set object alignment values.
4223 set_object_alignment();
4224
4225 #if !INCLUDE_ALL_GCS
4226 force_serial_gc();
4227 #endif // INCLUDE_ALL_GCS
4228 #if !INCLUDE_CDS
4229 if (DumpSharedSpaces || RequireSharedSpaces) {
4230 jio_fprintf(defaultStream::error_stream(),
4231 "Shared spaces are not supported in this VM\n");
4232 return JNI_ERR;
4233 }
4234 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) || PrintSharedSpaces) {
4235 warning("Shared spaces are not supported in this VM");
4236 FLAG_SET_DEFAULT(UseSharedSpaces, false);
4237 FLAG_SET_DEFAULT(PrintSharedSpaces, false);
4238 }
4239 no_shared_spaces("CDS Disabled");
4240 #endif // INCLUDE_CDS
4241
4242 return JNI_OK;
4243 }
4244
4245 jint Arguments::apply_ergo() {
4246
4247 // Set flags based on ergonomics.
4248 set_ergonomics_flags();
4249
4250 set_shared_spaces_flags();
4251
4252 // Check the GC selections again.
4253 if (!check_gc_consistency()) {
4254 return JNI_EINVAL;
4255 }
4256
4257 if (TieredCompilation) {
4258 set_tiered_flags();
4259 } else {
4260 int max_compilation_policy_choice = 1;
4261 #ifdef COMPILER2
4262 max_compilation_policy_choice = 2;
4263 #endif
4264 // Check if the policy is valid.
4265 if (CompilationPolicyChoice >= max_compilation_policy_choice) {
4266 vm_exit_during_initialization(
4267 "Incompatible compilation policy selected", NULL);
4268 }
4269 // Scale CompileThreshold
4270 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves CompileThreshold unchanged.
4271 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
4272 FLAG_SET_ERGO(intx, CompileThreshold, scaled_compile_threshold(CompileThreshold));
4273 }
4274 }
4275
4276 #ifdef COMPILER2
4277 #ifndef PRODUCT
4278 if (PrintIdealGraphLevel > 0) {
4279 FLAG_SET_ERGO(bool, PrintIdealGraph, true);
4280 }
4281 #endif
4282 #endif
4283
4284 // Set heap size based on available physical memory
4285 set_heap_size();
4286
4287 ArgumentsExt::set_gc_specific_flags();
4288
4289 // Initialize Metaspace flags and alignments
4290 Metaspace::ergo_initialize();
4291
4292 // Set bytecode rewriting flags
4293 set_bytecode_flags();
4294
4295 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled
4296 jint code = set_aggressive_opts_flags();
4297 if (code != JNI_OK) {
4298 return code;
4299 }
4300
4301 // Turn off biased locking for locking debug mode flags,
4302 // which are subtly different from each other but neither works with
4303 // biased locking
4304 if (UseHeavyMonitors
4305 #ifdef COMPILER1
4306 || !UseFastLocking
4307 #endif // COMPILER1
4308 #if INCLUDE_JVMCI
4309 || !JVMCIUseFastLocking
4310 #endif
4311 ) {
4312 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) {
4313 // flag set to true on command line; warn the user that they
4314 // can't enable biased locking here
4315 warning("Biased Locking is not supported with locking debug flags"
4316 "; ignoring UseBiasedLocking flag." );
4317 }
4318 UseBiasedLocking = false;
4319 }
4320
4321 #ifdef ZERO
4322 // Clear flags not supported on zero.
4323 FLAG_SET_DEFAULT(ProfileInterpreter, false);
4324 FLAG_SET_DEFAULT(UseBiasedLocking, false);
4325 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false));
4326 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false));
4327 #endif // CC_INTERP
4328
4329 #ifdef COMPILER2
4330 if (!EliminateLocks) {
4331 EliminateNestedLocks = false;
4332 }
4333 if (!Inline) {
4334 IncrementalInline = false;
4335 }
4336 #ifndef PRODUCT
4337 if (!IncrementalInline) {
4338 AlwaysIncrementalInline = false;
4339 }
4340 #endif
4341 if (!UseTypeSpeculation && FLAG_IS_DEFAULT(TypeProfileLevel)) {
4342 // nothing to use the profiling, turn if off
4343 FLAG_SET_DEFAULT(TypeProfileLevel, 0);
4344 }
4345 #endif
4346
4347 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) {
4348 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output");
4349 DebugNonSafepoints = true;
4350 }
4351
4352 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) {
4353 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used");
4354 }
4355
4356 #ifndef PRODUCT
4357 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) {
4358 if (use_vm_log()) {
4359 LogVMOutput = true;
4360 }
4361 }
4362 #endif // PRODUCT
4363
4364 if (PrintCommandLineFlags) {
4365 CommandLineFlags::printSetFlags(tty);
4366 }
4367
4368 // Apply CPU specific policy for the BiasedLocking
4369 if (UseBiasedLocking) {
4370 if (!VM_Version::use_biased_locking() &&
4371 !(FLAG_IS_CMDLINE(UseBiasedLocking))) {
4372 UseBiasedLocking = false;
4373 }
4374 }
4375 #ifdef COMPILER2
4376 if (!UseBiasedLocking || EmitSync != 0) {
4377 UseOptoBiasInlining = false;
4378 }
4379 #endif
4380
4381 return JNI_OK;
4382 }
4383
4384 jint Arguments::adjust_after_os() {
4385 if (UseNUMA) {
4386 if (UseParallelGC || UseParallelOldGC) {
4387 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) {
4388 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M);
4389 }
4390 }
4391 // UseNUMAInterleaving is set to ON for all collectors and
4392 // platforms when UseNUMA is set to ON. NUMA-aware collectors
4393 // such as the parallel collector for Linux and Solaris will
4394 // interleave old gen and survivor spaces on top of NUMA
4395 // allocation policy for the eden space.
4396 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on
4397 // all platforms and ParallelGC on Windows will interleave all
4398 // of the heap spaces across NUMA nodes.
4399 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) {
4400 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true);
4401 }
4402 }
4403 return JNI_OK;
4404 }
4405
4406 int Arguments::PropertyList_count(SystemProperty* pl) {
4407 int count = 0;
4408 while(pl != NULL) {
4409 count++;
4410 pl = pl->next();
4411 }
4412 return count;
4413 }
4414
4415 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) {
4416 assert(key != NULL, "just checking");
4417 SystemProperty* prop;
4418 for (prop = pl; prop != NULL; prop = prop->next()) {
4419 if (strcmp(key, prop->key()) == 0) return prop->value();
4420 }
4421 return NULL;
4422 }
4423
4424 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) {
4425 int count = 0;
4426 const char* ret_val = NULL;
4427
4428 while(pl != NULL) {
4429 if(count >= index) {
4430 ret_val = pl->key();
4431 break;
4432 }
4433 count++;
4434 pl = pl->next();
4435 }
4436
4437 return ret_val;
4438 }
4439
4440 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) {
4441 int count = 0;
4442 char* ret_val = NULL;
4443
4444 while(pl != NULL) {
4445 if(count >= index) {
4446 ret_val = pl->value();
4447 break;
4448 }
4449 count++;
4450 pl = pl->next();
4451 }
4452
4453 return ret_val;
4454 }
4455
4456 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) {
4457 SystemProperty* p = *plist;
4458 if (p == NULL) {
4459 *plist = new_p;
4460 } else {
4461 while (p->next() != NULL) {
4462 p = p->next();
4463 }
4464 p->set_next(new_p);
4465 }
4466 }
4467
4468 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v) {
4469 if (plist == NULL)
4470 return;
4471
4472 SystemProperty* new_p = new SystemProperty(k, v, true);
4473 PropertyList_add(plist, new_p);
4474 }
4475
4476 void Arguments::PropertyList_add(SystemProperty *element) {
4477 PropertyList_add(&_system_properties, element);
4478 }
4479
4480 // This add maintains unique property key in the list.
4481 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v, jboolean append) {
4482 if (plist == NULL)
4483 return;
4484
4485 // If property key exist then update with new value.
4486 SystemProperty* prop;
4487 for (prop = *plist; prop != NULL; prop = prop->next()) {
4488 if (strcmp(k, prop->key()) == 0) {
4489 if (append) {
4490 prop->append_value(v);
4491 } else {
4492 prop->set_value(v);
4493 }
4494 return;
4495 }
4496 }
4497
4498 PropertyList_add(plist, k, v);
4499 }
4500
4501 // Copies src into buf, replacing "%%" with "%" and "%p" with pid
4502 // Returns true if all of the source pointed by src has been copied over to
4503 // the destination buffer pointed by buf. Otherwise, returns false.
4504 // Notes:
4505 // 1. If the length (buflen) of the destination buffer excluding the
4506 // NULL terminator character is not long enough for holding the expanded
4507 // pid characters, it also returns false instead of returning the partially
4508 // expanded one.
4509 // 2. The passed in "buflen" should be large enough to hold the null terminator.
4510 bool Arguments::copy_expand_pid(const char* src, size_t srclen,
4511 char* buf, size_t buflen) {
4512 const char* p = src;
4513 char* b = buf;
4514 const char* src_end = &src[srclen];
4515 char* buf_end = &buf[buflen - 1];
4516
4517 while (p < src_end && b < buf_end) {
4518 if (*p == '%') {
4519 switch (*(++p)) {
4520 case '%': // "%%" ==> "%"
4521 *b++ = *p++;
4522 break;
4523 case 'p': { // "%p" ==> current process id
4524 // buf_end points to the character before the last character so
4525 // that we could write '\0' to the end of the buffer.
4526 size_t buf_sz = buf_end - b + 1;
4527 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id());
4528
4529 // if jio_snprintf fails or the buffer is not long enough to hold
4530 // the expanded pid, returns false.
4531 if (ret < 0 || ret >= (int)buf_sz) {
4532 return false;
4533 } else {
4534 b += ret;
4535 assert(*b == '\0', "fail in copy_expand_pid");
4536 if (p == src_end && b == buf_end + 1) {
4537 // reach the end of the buffer.
4538 return true;
4539 }
4540 }
4541 p++;
4542 break;
4543 }
4544 default :
4545 *b++ = '%';
4546 }
4547 } else {
4548 *b++ = *p++;
4549 }
4550 }
4551 *b = '\0';
4552 return (p == src_end); // return false if not all of the source was copied
4553 }