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 { "JNIDetachReleasesMonitors", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
368
369 #ifdef TEST_VERIFY_SPECIAL_JVM_FLAGS
370 { "dep > obs", JDK_Version::jdk(9), JDK_Version::jdk(8), JDK_Version::undefined() },
371 { "dep > exp ", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(8) },
372 { "obs > exp ", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(8) },
373 { "not deprecated or obsolete", JDK_Version::undefined(), JDK_Version::undefined(), JDK_Version::jdk(9) },
374 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
375 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
376 { "BytecodeVerificationRemote", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::undefined() },
377 #endif
378
379 { NULL, JDK_Version(0), JDK_Version(0) }
380 };
381
382 // Flags that are aliases for other flags.
383 typedef struct {
384 const char* alias_name;
385 const char* real_name;
386 } AliasedFlag;
387
388 static AliasedFlag const aliased_jvm_flags[] = {
389 { "DefaultMaxRAMFraction", "MaxRAMFraction" },
390 { "CMSMarkStackSizeMax", "MarkStackSizeMax" },
391 { "CMSMarkStackSize", "MarkStackSize" },
392 { "G1MarkStackSize", "MarkStackSize" },
393 { "ParallelMarkingThreads", "ConcGCThreads" },
394 { "ParallelCMSThreads", "ConcGCThreads" },
395 { "CreateMinidumpOnCrash", "CreateCoredumpOnCrash" },
396 { NULL, NULL}
397 };
398
399 // Return true if "v" is less than "other", where "other" may be "undefined".
400 static bool version_less_than(JDK_Version v, JDK_Version other) {
401 assert(!v.is_undefined(), "must be defined");
402 if (!other.is_undefined() && v.compare(other) >= 0) {
403 return false;
404 } else {
405 return true;
406 }
407 }
408
409 static bool lookup_special_flag(const char *flag_name, SpecialFlag& flag) {
410 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
411 if ((strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
412 flag = special_jvm_flags[i];
413 return true;
414 }
415 }
416 return false;
417 }
418
419 bool Arguments::is_obsolete_flag(const char *flag_name, JDK_Version* version) {
420 assert(version != NULL, "Must provide a version buffer");
421 SpecialFlag flag;
422 if (lookup_special_flag(flag_name, flag)) {
423 if (!flag.obsolete_in.is_undefined()) {
424 if (version_less_than(JDK_Version::current(), flag.expired_in)) {
425 *version = flag.obsolete_in;
426 return true;
427 }
428 }
429 }
430 return false;
431 }
432
433 int Arguments::is_deprecated_flag(const char *flag_name, JDK_Version* version) {
434 assert(version != NULL, "Must provide a version buffer");
435 SpecialFlag flag;
436 if (lookup_special_flag(flag_name, flag)) {
437 if (!flag.deprecated_in.is_undefined()) {
438 if (version_less_than(JDK_Version::current(), flag.obsolete_in) &&
439 version_less_than(JDK_Version::current(), flag.expired_in)) {
440 *version = flag.deprecated_in;
441 return 1;
442 } else {
443 return -1;
444 }
445 }
446 }
447 return 0;
448 }
449
450 const char* Arguments::real_flag_name(const char *flag_name) {
451 for (size_t i = 0; aliased_jvm_flags[i].alias_name != NULL; i++) {
452 const AliasedFlag& flag_status = aliased_jvm_flags[i];
453 if (strcmp(flag_status.alias_name, flag_name) == 0) {
454 return flag_status.real_name;
455 }
456 }
457 return flag_name;
458 }
459
460 #ifndef PRODUCT
461 static bool lookup_special_flag(const char *flag_name, size_t skip_index) {
462 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
463 if ((i != skip_index) && (strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
464 return true;
465 }
466 }
467 return false;
468 }
469
470 static bool verify_special_jvm_flags() {
471 bool success = true;
472 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
473 const SpecialFlag& flag = special_jvm_flags[i];
474 if (lookup_special_flag(flag.name, i)) {
475 warning("Duplicate special flag declaration \"%s\"", flag.name);
476 success = false;
477 }
478 if (flag.deprecated_in.is_undefined() &&
479 flag.obsolete_in.is_undefined()) {
480 warning("Special flag entry \"%s\" must declare version deprecated and/or obsoleted in.", flag.name);
481 success = false;
482 }
483
484 if (!flag.deprecated_in.is_undefined()) {
485 if (!version_less_than(flag.deprecated_in, flag.obsolete_in)) {
486 warning("Special flag entry \"%s\" must be deprecated before obsoleted.", flag.name);
487 success = false;
488 }
489
490 if (!version_less_than(flag.deprecated_in, flag.expired_in)) {
491 warning("Special flag entry \"%s\" must be deprecated before expired.", flag.name);
492 success = false;
493 }
494 }
495
496 if (!flag.obsolete_in.is_undefined()) {
497 if (!version_less_than(flag.obsolete_in, flag.expired_in)) {
498 warning("Special flag entry \"%s\" must be obsoleted before expired.", flag.name);
499 success = false;
500 }
501
502 // if flag has become obsolete it should not have a "globals" flag defined anymore.
503 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) {
504 if (Flag::find_flag(flag.name) != NULL) {
505 warning("Global variable for obsolete special flag entry \"%s\" should be removed", flag.name);
506 success = false;
507 }
508 }
509 }
510
511 if (!flag.expired_in.is_undefined()) {
512 // if flag has become expired it should not have a "globals" flag defined anymore.
513 if (!version_less_than(JDK_Version::current(), flag.expired_in)) {
514 if (Flag::find_flag(flag.name) != NULL) {
515 warning("Global variable for expired flag entry \"%s\" should be removed", flag.name);
516 success = false;
517 }
518 }
519 }
520
521 }
522 return success;
523 }
524 #endif
525
526 // Constructs the system class path (aka boot class path) from the following
527 // components, in order:
528 //
529 // prefix // from -Xbootclasspath/p:...
530 // base // from os::get_system_properties() or -Xbootclasspath=
531 // suffix // from -Xbootclasspath/a:...
532 //
533 // This could be AllStatic, but it isn't needed after argument processing is
534 // complete.
535 class SysClassPath: public StackObj {
536 public:
537 SysClassPath(const char* base);
538 ~SysClassPath();
539
540 inline void set_base(const char* base);
541 inline void add_prefix(const char* prefix);
542 inline void add_suffix_to_prefix(const char* suffix);
543 inline void add_suffix(const char* suffix);
544 inline void reset_path(const char* base);
545
546 inline const char* get_base() const { return _items[_scp_base]; }
547 inline const char* get_prefix() const { return _items[_scp_prefix]; }
548 inline const char* get_suffix() const { return _items[_scp_suffix]; }
549
550 // Combine all the components into a single c-heap-allocated string; caller
551 // must free the string if/when no longer needed.
552 char* combined_path();
553
554 private:
555 // Utility routines.
556 static char* add_to_path(const char* path, const char* str, bool prepend);
557 static char* add_jars_to_path(char* path, const char* directory);
558
559 inline void reset_item_at(int index);
560
561 // Array indices for the items that make up the sysclasspath. All except the
562 // base are allocated in the C heap and freed by this class.
563 enum {
564 _scp_prefix, // from -Xbootclasspath/p:...
565 _scp_base, // the default sysclasspath
566 _scp_suffix, // from -Xbootclasspath/a:...
567 _scp_nitems // the number of items, must be last.
568 };
569
570 const char* _items[_scp_nitems];
571 };
572
573 SysClassPath::SysClassPath(const char* base) {
574 memset(_items, 0, sizeof(_items));
575 _items[_scp_base] = base;
576 }
577
578 SysClassPath::~SysClassPath() {
579 // Free everything except the base.
580 for (int i = 0; i < _scp_nitems; ++i) {
581 if (i != _scp_base) reset_item_at(i);
582 }
583 }
584
585 inline void SysClassPath::set_base(const char* base) {
586 _items[_scp_base] = base;
587 }
588
589 inline void SysClassPath::add_prefix(const char* prefix) {
590 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], prefix, true);
591 }
592
593 inline void SysClassPath::add_suffix_to_prefix(const char* suffix) {
594 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], suffix, false);
595 }
596
597 inline void SysClassPath::add_suffix(const char* suffix) {
598 _items[_scp_suffix] = add_to_path(_items[_scp_suffix], suffix, false);
599 }
600
601 inline void SysClassPath::reset_item_at(int index) {
602 assert(index < _scp_nitems && index != _scp_base, "just checking");
603 if (_items[index] != NULL) {
604 FREE_C_HEAP_ARRAY(char, _items[index]);
605 _items[index] = NULL;
606 }
607 }
608
609 inline void SysClassPath::reset_path(const char* base) {
610 // Clear the prefix and suffix.
611 reset_item_at(_scp_prefix);
612 reset_item_at(_scp_suffix);
613 set_base(base);
614 }
615
616 //------------------------------------------------------------------------------
617
618
619 // Combine the bootclasspath elements, some of which may be null, into a single
620 // c-heap-allocated string.
621 char* SysClassPath::combined_path() {
622 assert(_items[_scp_base] != NULL, "empty default sysclasspath");
623
624 size_t lengths[_scp_nitems];
625 size_t total_len = 0;
626
627 const char separator = *os::path_separator();
628
629 // Get the lengths.
630 int i;
631 for (i = 0; i < _scp_nitems; ++i) {
632 if (_items[i] != NULL) {
633 lengths[i] = strlen(_items[i]);
634 // Include space for the separator char (or a NULL for the last item).
635 total_len += lengths[i] + 1;
636 }
637 }
638 assert(total_len > 0, "empty sysclasspath not allowed");
639
640 // Copy the _items to a single string.
641 char* cp = NEW_C_HEAP_ARRAY(char, total_len, mtInternal);
642 char* cp_tmp = cp;
643 for (i = 0; i < _scp_nitems; ++i) {
644 if (_items[i] != NULL) {
645 memcpy(cp_tmp, _items[i], lengths[i]);
646 cp_tmp += lengths[i];
647 *cp_tmp++ = separator;
648 }
649 }
650 *--cp_tmp = '\0'; // Replace the extra separator.
651 return cp;
652 }
653
654 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null.
655 char*
656 SysClassPath::add_to_path(const char* path, const char* str, bool prepend) {
657 char *cp;
658
659 assert(str != NULL, "just checking");
660 if (path == NULL) {
661 size_t len = strlen(str) + 1;
662 cp = NEW_C_HEAP_ARRAY(char, len, mtInternal);
663 memcpy(cp, str, len); // copy the trailing null
664 } else {
665 const char separator = *os::path_separator();
666 size_t old_len = strlen(path);
667 size_t str_len = strlen(str);
668 size_t len = old_len + str_len + 2;
669
670 if (prepend) {
671 cp = NEW_C_HEAP_ARRAY(char, len, mtInternal);
672 char* cp_tmp = cp;
673 memcpy(cp_tmp, str, str_len);
674 cp_tmp += str_len;
675 *cp_tmp = separator;
676 memcpy(++cp_tmp, path, old_len + 1); // copy the trailing null
677 FREE_C_HEAP_ARRAY(char, path);
678 } else {
679 cp = REALLOC_C_HEAP_ARRAY(char, path, len, mtInternal);
680 char* cp_tmp = cp + old_len;
681 *cp_tmp = separator;
682 memcpy(++cp_tmp, str, str_len + 1); // copy the trailing null
683 }
684 }
685 return cp;
686 }
687
688 // Scan the directory and append any jar or zip files found to path.
689 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null.
690 char* SysClassPath::add_jars_to_path(char* path, const char* directory) {
691 DIR* dir = os::opendir(directory);
692 if (dir == NULL) return path;
693
694 char dir_sep[2] = { '\0', '\0' };
695 size_t directory_len = strlen(directory);
696 const char fileSep = *os::file_separator();
697 if (directory[directory_len - 1] != fileSep) dir_sep[0] = fileSep;
698
699 /* Scan the directory for jars/zips, appending them to path. */
700 struct dirent *entry;
701 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtInternal);
702 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL) {
703 const char* name = entry->d_name;
704 const char* ext = name + strlen(name) - 4;
705 bool isJarOrZip = ext > name &&
706 (os::file_name_strcmp(ext, ".jar") == 0 ||
707 os::file_name_strcmp(ext, ".zip") == 0);
708 if (isJarOrZip) {
709 char* jarpath = NEW_C_HEAP_ARRAY(char, directory_len + 2 + strlen(name), mtInternal);
710 sprintf(jarpath, "%s%s%s", directory, dir_sep, name);
711 path = add_to_path(path, jarpath, false);
712 FREE_C_HEAP_ARRAY(char, jarpath);
713 }
714 }
715 FREE_C_HEAP_ARRAY(char, dbuf);
716 os::closedir(dir);
717 return path;
718 }
719
720 // Parses a memory size specification string.
721 static bool atomull(const char *s, julong* result) {
722 julong n = 0;
723 int args_read = 0;
724 bool is_hex = false;
725 // Skip leading 0[xX] for hexadecimal
726 if (*s =='0' && (*(s+1) == 'x' || *(s+1) == 'X')) {
727 s += 2;
728 is_hex = true;
729 args_read = sscanf(s, JULONG_FORMAT_X, &n);
730 } else {
731 args_read = sscanf(s, JULONG_FORMAT, &n);
732 }
733 if (args_read != 1) {
734 return false;
735 }
736 while (*s != '\0' && (isdigit(*s) || (is_hex && isxdigit(*s)))) {
737 s++;
738 }
739 // 4705540: illegal if more characters are found after the first non-digit
740 if (strlen(s) > 1) {
741 return false;
742 }
743 switch (*s) {
744 case 'T': case 't':
745 *result = n * G * K;
746 // Check for overflow.
747 if (*result/((julong)G * K) != n) return false;
748 return true;
749 case 'G': case 'g':
750 *result = n * G;
751 if (*result/G != n) return false;
752 return true;
753 case 'M': case 'm':
754 *result = n * M;
755 if (*result/M != n) return false;
756 return true;
757 case 'K': case 'k':
758 *result = n * K;
759 if (*result/K != n) return false;
760 return true;
761 case '\0':
762 *result = n;
763 return true;
764 default:
765 return false;
766 }
767 }
768
769 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size) {
770 if (size < min_size) return arg_too_small;
771 // Check that size will fit in a size_t (only relevant on 32-bit)
772 if (size > max_uintx) return arg_too_big;
773 return arg_in_range;
774 }
775
776 // Describe an argument out of range error
777 void Arguments::describe_range_error(ArgsRange errcode) {
778 switch(errcode) {
779 case arg_too_big:
780 jio_fprintf(defaultStream::error_stream(),
781 "The specified size exceeds the maximum "
782 "representable size.\n");
783 break;
784 case arg_too_small:
785 case arg_unreadable:
786 case arg_in_range:
787 // do nothing for now
788 break;
789 default:
790 ShouldNotReachHere();
791 }
792 }
793
794 static bool set_bool_flag(const char* name, bool value, Flag::Flags origin) {
795 if (CommandLineFlags::boolAtPut(name, &value, origin) == Flag::SUCCESS) {
796 return true;
797 } else {
798 return false;
799 }
800 }
801
802 static bool set_fp_numeric_flag(const char* name, char* value, Flag::Flags origin) {
803 char* end;
804 errno = 0;
805 double v = strtod(value, &end);
806 if ((errno != 0) || (*end != 0)) {
807 return false;
808 }
809
810 if (CommandLineFlags::doubleAtPut(name, &v, origin) == Flag::SUCCESS) {
811 return true;
812 }
813 return false;
814 }
815
816 static bool set_numeric_flag(const char* name, char* value, Flag::Flags origin) {
817 julong v;
818 int int_v;
819 intx intx_v;
820 bool is_neg = false;
821 Flag* result = Flag::find_flag(name, strlen(name));
822
823 if (result == NULL) {
824 return false;
825 }
826
827 // Check the sign first since atomull() parses only unsigned values.
828 if (*value == '-') {
829 if (!result->is_intx() && !result->is_int()) {
830 return false;
831 }
832 value++;
833 is_neg = true;
834 }
835 if (!atomull(value, &v)) {
836 return false;
837 }
838 if (result->is_int()) {
839 int_v = (int) v;
840 if (is_neg) {
841 int_v = -int_v;
842 }
843 return CommandLineFlags::intAtPut(result, &int_v, origin) == Flag::SUCCESS;
844 } else if (result->is_uint()) {
845 uint uint_v = (uint) v;
846 return CommandLineFlags::uintAtPut(result, &uint_v, origin) == Flag::SUCCESS;
847 } else if (result->is_intx()) {
848 intx_v = (intx) v;
849 if (is_neg) {
850 intx_v = -intx_v;
851 }
852 return CommandLineFlags::intxAtPut(result, &intx_v, origin) == Flag::SUCCESS;
853 } else if (result->is_uintx()) {
854 uintx uintx_v = (uintx) v;
855 return CommandLineFlags::uintxAtPut(result, &uintx_v, origin) == Flag::SUCCESS;
856 } else if (result->is_uint64_t()) {
857 uint64_t uint64_t_v = (uint64_t) v;
858 return CommandLineFlags::uint64_tAtPut(result, &uint64_t_v, origin) == Flag::SUCCESS;
859 } else if (result->is_size_t()) {
860 size_t size_t_v = (size_t) v;
861 return CommandLineFlags::size_tAtPut(result, &size_t_v, origin) == Flag::SUCCESS;
862 } else {
863 return false;
864 }
865 }
866
867 static bool set_string_flag(const char* name, const char* value, Flag::Flags origin) {
868 if (CommandLineFlags::ccstrAtPut(name, &value, origin) != Flag::SUCCESS) return false;
869 // Contract: CommandLineFlags always returns a pointer that needs freeing.
870 FREE_C_HEAP_ARRAY(char, value);
871 return true;
872 }
873
874 static bool append_to_string_flag(const char* name, const char* new_value, Flag::Flags origin) {
875 const char* old_value = "";
876 if (CommandLineFlags::ccstrAt(name, &old_value) != Flag::SUCCESS) return false;
877 size_t old_len = old_value != NULL ? strlen(old_value) : 0;
878 size_t new_len = strlen(new_value);
879 const char* value;
880 char* free_this_too = NULL;
881 if (old_len == 0) {
882 value = new_value;
883 } else if (new_len == 0) {
884 value = old_value;
885 } else {
886 char* buf = NEW_C_HEAP_ARRAY(char, old_len + 1 + new_len + 1, mtInternal);
887 // each new setting adds another LINE to the switch:
888 sprintf(buf, "%s\n%s", old_value, new_value);
889 value = buf;
890 free_this_too = buf;
891 }
892 (void) CommandLineFlags::ccstrAtPut(name, &value, origin);
893 // CommandLineFlags always returns a pointer that needs freeing.
894 FREE_C_HEAP_ARRAY(char, value);
895 if (free_this_too != NULL) {
896 // CommandLineFlags made its own copy, so I must delete my own temp. buffer.
897 FREE_C_HEAP_ARRAY(char, free_this_too);
898 }
899 return true;
900 }
901
902 const char* Arguments::handle_aliases_and_deprecation(const char* arg, bool warn) {
903 const char* real_name = real_flag_name(arg);
904 JDK_Version since = JDK_Version();
905 switch (is_deprecated_flag(arg, &since)) {
906 case -1:
907 return NULL; // obsolete or expired, don't process normally
908 case 0:
909 return real_name;
910 case 1: {
911 if (warn) {
912 char version[256];
913 since.to_string(version, sizeof(version));
914 if (real_name != arg) {
915 warning("Option %s was deprecated in version %s and will likely be removed in a future release. Use option %s instead.",
916 arg, version, real_name);
917 } else {
918 warning("Option %s was deprecated in version %s and will likely be removed in a future release.",
919 arg, version);
920 }
921 }
922 return real_name;
923 }
924 }
925 ShouldNotReachHere();
926 return NULL;
927 }
928
929 bool Arguments::parse_argument(const char* arg, Flag::Flags origin) {
930
931 // range of acceptable characters spelled out for portability reasons
932 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]"
933 #define BUFLEN 255
934 char name[BUFLEN+1];
935 char dummy;
936 const char* real_name;
937 bool warn_if_deprecated = true;
938
939 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
940 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
941 if (real_name == NULL) {
942 return false;
943 }
944 return set_bool_flag(real_name, false, origin);
945 }
946 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
947 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
948 if (real_name == NULL) {
949 return false;
950 }
951 return set_bool_flag(real_name, true, origin);
952 }
953
954 char punct;
955 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') {
956 const char* value = strchr(arg, '=') + 1;
957 Flag* flag;
958
959 // this scanf pattern matches both strings (handled here) and numbers (handled later))
960 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
961 if (real_name == NULL) {
962 return false;
963 }
964 flag = Flag::find_flag(real_name);
965 if (flag != NULL && flag->is_ccstr()) {
966 if (flag->ccstr_accumulates()) {
967 return append_to_string_flag(real_name, value, origin);
968 } else {
969 if (value[0] == '\0') {
970 value = NULL;
971 }
972 return set_string_flag(real_name, value, origin);
973 }
974 } else {
975 warn_if_deprecated = false; // if arg is deprecated, we've already done warning...
976 }
977 }
978
979 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') {
980 const char* value = strchr(arg, '=') + 1;
981 // -XX:Foo:=xxx will reset the string flag to the given value.
982 if (value[0] == '\0') {
983 value = NULL;
984 }
985 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
986 if (real_name == NULL) {
987 return false;
988 }
989 return set_string_flag(real_name, value, origin);
990 }
991
992 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.eE+]"
993 #define SIGNED_NUMBER_RANGE "[-0123456789]"
994 #define NUMBER_RANGE "[0123456789eE+-]"
995 char value[BUFLEN + 1];
996 char value2[BUFLEN + 1];
997 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) {
998 // Looks like a floating-point number -- try again with more lenient format string
999 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) {
1000 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1001 if (real_name == NULL) {
1002 return false;
1003 }
1004 return set_fp_numeric_flag(real_name, value, origin);
1005 }
1006 }
1007
1008 #define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]"
1009 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) {
1010 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1011 if (real_name == NULL) {
1012 return false;
1013 }
1014 return set_numeric_flag(real_name, value, origin);
1015 }
1016
1017 return false;
1018 }
1019
1020 void Arguments::add_string(char*** bldarray, int* count, const char* arg) {
1021 assert(bldarray != NULL, "illegal argument");
1022
1023 if (arg == NULL) {
1024 return;
1025 }
1026
1027 int new_count = *count + 1;
1028
1029 // expand the array and add arg to the last element
1030 if (*bldarray == NULL) {
1031 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtInternal);
1032 } else {
1033 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtInternal);
1034 }
1035 (*bldarray)[*count] = os::strdup_check_oom(arg);
1036 *count = new_count;
1037 }
1038
1039 void Arguments::build_jvm_args(const char* arg) {
1040 add_string(&_jvm_args_array, &_num_jvm_args, arg);
1041 }
1042
1043 void Arguments::build_jvm_flags(const char* arg) {
1044 add_string(&_jvm_flags_array, &_num_jvm_flags, arg);
1045 }
1046
1047 // utility function to return a string that concatenates all
1048 // strings in a given char** array
1049 const char* Arguments::build_resource_string(char** args, int count) {
1050 if (args == NULL || count == 0) {
1051 return NULL;
1052 }
1053 size_t length = strlen(args[0]) + 1; // add 1 for the null terminator
1054 for (int i = 1; i < count; i++) {
1055 length += strlen(args[i]) + 1; // add 1 for a space
1056 }
1057 char* s = NEW_RESOURCE_ARRAY(char, length);
1058 strcpy(s, args[0]);
1059 for (int j = 1; j < count; j++) {
1060 strcat(s, " ");
1061 strcat(s, args[j]);
1062 }
1063 return (const char*) s;
1064 }
1065
1066 void Arguments::print_on(outputStream* st) {
1067 st->print_cr("VM Arguments:");
1068 if (num_jvm_flags() > 0) {
1069 st->print("jvm_flags: "); print_jvm_flags_on(st);
1070 st->cr();
1071 }
1072 if (num_jvm_args() > 0) {
1073 st->print("jvm_args: "); print_jvm_args_on(st);
1074 st->cr();
1075 }
1076 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>");
1077 if (_java_class_path != NULL) {
1078 char* path = _java_class_path->value();
1079 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path );
1080 }
1081 st->print_cr("Launcher Type: %s", _sun_java_launcher);
1082 }
1083
1084 void Arguments::print_summary_on(outputStream* st) {
1085 // Print the command line. Environment variables that are helpful for
1086 // reproducing the problem are written later in the hs_err file.
1087 // flags are from setting file
1088 if (num_jvm_flags() > 0) {
1089 st->print_raw("Settings File: ");
1090 print_jvm_flags_on(st);
1091 st->cr();
1092 }
1093 // args are the command line and environment variable arguments.
1094 st->print_raw("Command Line: ");
1095 if (num_jvm_args() > 0) {
1096 print_jvm_args_on(st);
1097 }
1098 // this is the classfile and any arguments to the java program
1099 if (java_command() != NULL) {
1100 st->print("%s", java_command());
1101 }
1102 st->cr();
1103 }
1104
1105 void Arguments::print_jvm_flags_on(outputStream* st) {
1106 if (_num_jvm_flags > 0) {
1107 for (int i=0; i < _num_jvm_flags; i++) {
1108 st->print("%s ", _jvm_flags_array[i]);
1109 }
1110 }
1111 }
1112
1113 void Arguments::print_jvm_args_on(outputStream* st) {
1114 if (_num_jvm_args > 0) {
1115 for (int i=0; i < _num_jvm_args; i++) {
1116 st->print("%s ", _jvm_args_array[i]);
1117 }
1118 }
1119 }
1120
1121 bool Arguments::process_argument(const char* arg,
1122 jboolean ignore_unrecognized,
1123 Flag::Flags origin) {
1124 JDK_Version since = JDK_Version();
1125
1126 if (parse_argument(arg, origin)) {
1127 return true;
1128 }
1129
1130 // Determine if the flag has '+', '-', or '=' characters.
1131 bool has_plus_minus = (*arg == '+' || *arg == '-');
1132 const char* const argname = has_plus_minus ? arg + 1 : arg;
1133
1134 size_t arg_len;
1135 const char* equal_sign = strchr(argname, '=');
1136 if (equal_sign == NULL) {
1137 arg_len = strlen(argname);
1138 } else {
1139 arg_len = equal_sign - argname;
1140 }
1141
1142 // Only make the obsolete check for valid arguments.
1143 if (arg_len <= BUFLEN) {
1144 // Construct a string which consists only of the argument name without '+', '-', or '='.
1145 char stripped_argname[BUFLEN+1];
1146 strncpy(stripped_argname, argname, arg_len);
1147 stripped_argname[arg_len] = '\0'; // strncpy may not null terminate.
1148
1149 if (is_obsolete_flag(stripped_argname, &since)) {
1150 char version[256];
1151 since.to_string(version, sizeof(version));
1152 warning("Ignoring option %s; support was removed in %s", stripped_argname, version);
1153 return true;
1154 }
1155 }
1156
1157 // For locked flags, report a custom error message if available.
1158 // Otherwise, report the standard unrecognized VM option.
1159 Flag* found_flag = Flag::find_flag((const char*)argname, arg_len, true, true);
1160 if (found_flag != NULL) {
1161 char locked_message_buf[BUFLEN];
1162 Flag::MsgType msg_type = found_flag->get_locked_message(locked_message_buf, BUFLEN);
1163 if (strlen(locked_message_buf) == 0) {
1164 if (found_flag->is_bool() && !has_plus_minus) {
1165 jio_fprintf(defaultStream::error_stream(),
1166 "Missing +/- setting for VM option '%s'\n", argname);
1167 } else if (!found_flag->is_bool() && has_plus_minus) {
1168 jio_fprintf(defaultStream::error_stream(),
1169 "Unexpected +/- setting in VM option '%s'\n", argname);
1170 } else {
1171 jio_fprintf(defaultStream::error_stream(),
1172 "Improperly specified VM option '%s'\n", argname);
1173 }
1174 } else {
1175 #ifdef PRODUCT
1176 bool mismatched = ((msg_type == Flag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD) ||
1177 (msg_type == Flag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD));
1178 if (ignore_unrecognized && mismatched) {
1179 return true;
1180 }
1181 #endif
1182 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf);
1183 }
1184 } else {
1185 if (ignore_unrecognized) {
1186 return true;
1187 }
1188 jio_fprintf(defaultStream::error_stream(),
1189 "Unrecognized VM option '%s'\n", argname);
1190 Flag* fuzzy_matched = Flag::fuzzy_match((const char*)argname, arg_len, true);
1191 if (fuzzy_matched != NULL) {
1192 jio_fprintf(defaultStream::error_stream(),
1193 "Did you mean '%s%s%s'? ",
1194 (fuzzy_matched->is_bool()) ? "(+/-)" : "",
1195 fuzzy_matched->_name,
1196 (fuzzy_matched->is_bool()) ? "" : "=<value>");
1197 }
1198 }
1199
1200 // allow for commandline "commenting out" options like -XX:#+Verbose
1201 return arg[0] == '#';
1202 }
1203
1204 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) {
1205 FILE* stream = fopen(file_name, "rb");
1206 if (stream == NULL) {
1207 if (should_exist) {
1208 jio_fprintf(defaultStream::error_stream(),
1209 "Could not open settings file %s\n", file_name);
1210 return false;
1211 } else {
1212 return true;
1213 }
1214 }
1215
1216 char token[1024];
1217 int pos = 0;
1218
1219 bool in_white_space = true;
1220 bool in_comment = false;
1221 bool in_quote = false;
1222 char quote_c = 0;
1223 bool result = true;
1224
1225 int c = getc(stream);
1226 while(c != EOF && pos < (int)(sizeof(token)-1)) {
1227 if (in_white_space) {
1228 if (in_comment) {
1229 if (c == '\n') in_comment = false;
1230 } else {
1231 if (c == '#') in_comment = true;
1232 else if (!isspace(c)) {
1233 in_white_space = false;
1234 token[pos++] = c;
1235 }
1236 }
1237 } else {
1238 if (c == '\n' || (!in_quote && isspace(c))) {
1239 // token ends at newline, or at unquoted whitespace
1240 // this allows a way to include spaces in string-valued options
1241 token[pos] = '\0';
1242 logOption(token);
1243 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
1244 build_jvm_flags(token);
1245 pos = 0;
1246 in_white_space = true;
1247 in_quote = false;
1248 } else if (!in_quote && (c == '\'' || c == '"')) {
1249 in_quote = true;
1250 quote_c = c;
1251 } else if (in_quote && (c == quote_c)) {
1252 in_quote = false;
1253 } else {
1254 token[pos++] = c;
1255 }
1256 }
1257 c = getc(stream);
1258 }
1259 if (pos > 0) {
1260 token[pos] = '\0';
1261 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
1262 build_jvm_flags(token);
1263 }
1264 fclose(stream);
1265 return result;
1266 }
1267
1268 //=============================================================================================================
1269 // Parsing of properties (-D)
1270
1271 const char* Arguments::get_property(const char* key) {
1272 return PropertyList_get_value(system_properties(), key);
1273 }
1274
1275 bool Arguments::add_property(const char* prop) {
1276 const char* eq = strchr(prop, '=');
1277 const char* key;
1278 const char* value = "";
1279
1280 if (eq == NULL) {
1281 // property doesn't have a value, thus use passed string
1282 key = prop;
1283 } else {
1284 // property have a value, thus extract it and save to the
1285 // allocated string
1286 size_t key_len = eq - prop;
1287 char* tmp_key = AllocateHeap(key_len + 1, mtInternal);
1288
1289 strncpy(tmp_key, prop, key_len);
1290 tmp_key[key_len] = '\0';
1291 key = tmp_key;
1292
1293 value = &prop[key_len + 1];
1294 }
1295
1296 if (strcmp(key, "java.compiler") == 0) {
1297 process_java_compiler_argument(value);
1298 // Record value in Arguments, but let it get passed to Java.
1299 } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 ||
1300 strcmp(key, "sun.java.launcher.pid") == 0) {
1301 // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are
1302 // private and are processed in process_sun_java_launcher_properties();
1303 // the sun.java.launcher property is passed on to the java application
1304 } else if (strcmp(key, "sun.boot.library.path") == 0) {
1305 PropertyList_unique_add(&_system_properties, key, value, true);
1306 } else {
1307 if (strcmp(key, "sun.java.command") == 0) {
1308 if (_java_command != NULL) {
1309 os::free(_java_command);
1310 }
1311 _java_command = os::strdup_check_oom(value, mtInternal);
1312 } else if (strcmp(key, "java.vendor.url.bug") == 0) {
1313 if (_java_vendor_url_bug != DEFAULT_VENDOR_URL_BUG) {
1314 assert(_java_vendor_url_bug != NULL, "_java_vendor_url_bug is NULL");
1315 os::free((void *)_java_vendor_url_bug);
1316 }
1317 // save it in _java_vendor_url_bug, so JVM fatal error handler can access
1318 // its value without going through the property list or making a Java call.
1319 _java_vendor_url_bug = os::strdup_check_oom(value, mtInternal);
1320 }
1321
1322 // Create new property and add at the end of the list
1323 PropertyList_unique_add(&_system_properties, key, value);
1324 }
1325
1326 if (key != prop) {
1327 // SystemProperty copy passed value, thus free previously allocated
1328 // memory
1329 FreeHeap((void *)key);
1330 }
1331
1332 return true;
1333 }
1334
1335 //===========================================================================================================
1336 // Setting int/mixed/comp mode flags
1337
1338 void Arguments::set_mode_flags(Mode mode) {
1339 // Set up default values for all flags.
1340 // If you add a flag to any of the branches below,
1341 // add a default value for it here.
1342 set_java_compiler(false);
1343 _mode = mode;
1344
1345 // Ensure Agent_OnLoad has the correct initial values.
1346 // This may not be the final mode; mode may change later in onload phase.
1347 PropertyList_unique_add(&_system_properties, "java.vm.info",
1348 VM_Version::vm_info_string(), false);
1349
1350 UseInterpreter = true;
1351 UseCompiler = true;
1352 UseLoopCounter = true;
1353
1354 // Default values may be platform/compiler dependent -
1355 // use the saved values
1356 ClipInlining = Arguments::_ClipInlining;
1357 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods;
1358 UseOnStackReplacement = Arguments::_UseOnStackReplacement;
1359 BackgroundCompilation = Arguments::_BackgroundCompilation;
1360 if (TieredCompilation) {
1361 if (FLAG_IS_DEFAULT(Tier3InvokeNotifyFreqLog)) {
1362 Tier3InvokeNotifyFreqLog = Arguments::_Tier3InvokeNotifyFreqLog;
1363 }
1364 if (FLAG_IS_DEFAULT(Tier4InvocationThreshold)) {
1365 Tier4InvocationThreshold = Arguments::_Tier4InvocationThreshold;
1366 }
1367 }
1368
1369 // Change from defaults based on mode
1370 switch (mode) {
1371 default:
1372 ShouldNotReachHere();
1373 break;
1374 case _int:
1375 UseCompiler = false;
1376 UseLoopCounter = false;
1377 AlwaysCompileLoopMethods = false;
1378 UseOnStackReplacement = false;
1379 break;
1380 case _mixed:
1381 // same as default
1382 break;
1383 case _comp:
1384 UseInterpreter = false;
1385 BackgroundCompilation = false;
1386 ClipInlining = false;
1387 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more.
1388 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and
1389 // compile a level 4 (C2) and then continue executing it.
1390 if (TieredCompilation) {
1391 Tier3InvokeNotifyFreqLog = 0;
1392 Tier4InvocationThreshold = 0;
1393 }
1394 break;
1395 }
1396 }
1397
1398 #if defined(COMPILER2) || INCLUDE_JVMCI || defined(_LP64) || !INCLUDE_CDS
1399 // Conflict: required to use shared spaces (-Xshare:on), but
1400 // incompatible command line options were chosen.
1401
1402 static void no_shared_spaces(const char* message) {
1403 if (RequireSharedSpaces) {
1404 jio_fprintf(defaultStream::error_stream(),
1405 "Class data sharing is inconsistent with other specified options.\n");
1406 vm_exit_during_initialization("Unable to use shared archive.", message);
1407 } else {
1408 FLAG_SET_DEFAULT(UseSharedSpaces, false);
1409 }
1410 }
1411 #endif
1412
1413 // Returns threshold scaled with the value of scale.
1414 // If scale < 0.0, threshold is returned without scaling.
1415 intx Arguments::scaled_compile_threshold(intx threshold, double scale) {
1416 if (scale == 1.0 || scale < 0.0) {
1417 return threshold;
1418 } else {
1419 return (intx)(threshold * scale);
1420 }
1421 }
1422
1423 // Returns freq_log scaled with the value of scale.
1424 // Returned values are in the range of [0, InvocationCounter::number_of_count_bits + 1].
1425 // If scale < 0.0, freq_log is returned without scaling.
1426 intx Arguments::scaled_freq_log(intx freq_log, double scale) {
1427 // Check if scaling is necessary or if negative value was specified.
1428 if (scale == 1.0 || scale < 0.0) {
1429 return freq_log;
1430 }
1431 // Check values to avoid calculating log2 of 0.
1432 if (scale == 0.0 || freq_log == 0) {
1433 return 0;
1434 }
1435 // Determine the maximum notification frequency value currently supported.
1436 // The largest mask value that the interpreter/C1 can handle is
1437 // of length InvocationCounter::number_of_count_bits. Mask values are always
1438 // one bit shorter then the value of the notification frequency. Set
1439 // max_freq_bits accordingly.
1440 intx max_freq_bits = InvocationCounter::number_of_count_bits + 1;
1441 intx scaled_freq = scaled_compile_threshold((intx)1 << freq_log, scale);
1442 if (scaled_freq == 0) {
1443 // Return 0 right away to avoid calculating log2 of 0.
1444 return 0;
1445 } else if (scaled_freq > nth_bit(max_freq_bits)) {
1446 return max_freq_bits;
1447 } else {
1448 return log2_intptr(scaled_freq);
1449 }
1450 }
1451
1452 void Arguments::set_tiered_flags() {
1453 // With tiered, set default policy to AdvancedThresholdPolicy, which is 3.
1454 if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) {
1455 FLAG_SET_DEFAULT(CompilationPolicyChoice, 3);
1456 }
1457 if (CompilationPolicyChoice < 2) {
1458 vm_exit_during_initialization(
1459 "Incompatible compilation policy selected", NULL);
1460 }
1461 // Increase the code cache size - tiered compiles a lot more.
1462 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
1463 FLAG_SET_ERGO(uintx, ReservedCodeCacheSize,
1464 MIN2(CODE_CACHE_DEFAULT_LIMIT, ReservedCodeCacheSize * 5));
1465 }
1466 // Enable SegmentedCodeCache if TieredCompilation is enabled and ReservedCodeCacheSize >= 240M
1467 if (FLAG_IS_DEFAULT(SegmentedCodeCache) && ReservedCodeCacheSize >= 240*M) {
1468 FLAG_SET_ERGO(bool, SegmentedCodeCache, true);
1469
1470 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
1471 // Multiply sizes by 5 but fix NonNMethodCodeHeapSize (distribute among non-profiled and profiled code heap)
1472 if (FLAG_IS_DEFAULT(ProfiledCodeHeapSize)) {
1473 FLAG_SET_ERGO(uintx, ProfiledCodeHeapSize, ProfiledCodeHeapSize * 5 + NonNMethodCodeHeapSize * 2);
1474 }
1475 if (FLAG_IS_DEFAULT(NonProfiledCodeHeapSize)) {
1476 FLAG_SET_ERGO(uintx, NonProfiledCodeHeapSize, NonProfiledCodeHeapSize * 5 + NonNMethodCodeHeapSize * 2);
1477 }
1478 // Check consistency of code heap sizes
1479 if ((NonNMethodCodeHeapSize + NonProfiledCodeHeapSize + ProfiledCodeHeapSize) != ReservedCodeCacheSize) {
1480 jio_fprintf(defaultStream::error_stream(),
1481 "Invalid code heap sizes: NonNMethodCodeHeapSize(%dK) + ProfiledCodeHeapSize(%dK) + NonProfiledCodeHeapSize(%dK) = %dK. Must be equal to ReservedCodeCacheSize = %uK.\n",
1482 NonNMethodCodeHeapSize/K, ProfiledCodeHeapSize/K, NonProfiledCodeHeapSize/K,
1483 (NonNMethodCodeHeapSize + ProfiledCodeHeapSize + NonProfiledCodeHeapSize)/K, ReservedCodeCacheSize/K);
1484 vm_exit(1);
1485 }
1486 }
1487 }
1488 if (!UseInterpreter) { // -Xcomp
1489 Tier3InvokeNotifyFreqLog = 0;
1490 Tier4InvocationThreshold = 0;
1491 }
1492
1493 if (CompileThresholdScaling < 0) {
1494 vm_exit_during_initialization("Negative value specified for CompileThresholdScaling", NULL);
1495 }
1496
1497 // Scale tiered compilation thresholds.
1498 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves compilation thresholds unchanged.
1499 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
1500 FLAG_SET_ERGO(intx, Tier0InvokeNotifyFreqLog, scaled_freq_log(Tier0InvokeNotifyFreqLog));
1501 FLAG_SET_ERGO(intx, Tier0BackedgeNotifyFreqLog, scaled_freq_log(Tier0BackedgeNotifyFreqLog));
1502
1503 FLAG_SET_ERGO(intx, Tier3InvocationThreshold, scaled_compile_threshold(Tier3InvocationThreshold));
1504 FLAG_SET_ERGO(intx, Tier3MinInvocationThreshold, scaled_compile_threshold(Tier3MinInvocationThreshold));
1505 FLAG_SET_ERGO(intx, Tier3CompileThreshold, scaled_compile_threshold(Tier3CompileThreshold));
1506 FLAG_SET_ERGO(intx, Tier3BackEdgeThreshold, scaled_compile_threshold(Tier3BackEdgeThreshold));
1507
1508 // Tier2{Invocation,MinInvocation,Compile,Backedge}Threshold should be scaled here
1509 // once these thresholds become supported.
1510
1511 FLAG_SET_ERGO(intx, Tier2InvokeNotifyFreqLog, scaled_freq_log(Tier2InvokeNotifyFreqLog));
1512 FLAG_SET_ERGO(intx, Tier2BackedgeNotifyFreqLog, scaled_freq_log(Tier2BackedgeNotifyFreqLog));
1513
1514 FLAG_SET_ERGO(intx, Tier3InvokeNotifyFreqLog, scaled_freq_log(Tier3InvokeNotifyFreqLog));
1515 FLAG_SET_ERGO(intx, Tier3BackedgeNotifyFreqLog, scaled_freq_log(Tier3BackedgeNotifyFreqLog));
1516
1517 FLAG_SET_ERGO(intx, Tier23InlineeNotifyFreqLog, scaled_freq_log(Tier23InlineeNotifyFreqLog));
1518
1519 FLAG_SET_ERGO(intx, Tier4InvocationThreshold, scaled_compile_threshold(Tier4InvocationThreshold));
1520 FLAG_SET_ERGO(intx, Tier4MinInvocationThreshold, scaled_compile_threshold(Tier4MinInvocationThreshold));
1521 FLAG_SET_ERGO(intx, Tier4CompileThreshold, scaled_compile_threshold(Tier4CompileThreshold));
1522 FLAG_SET_ERGO(intx, Tier4BackEdgeThreshold, scaled_compile_threshold(Tier4BackEdgeThreshold));
1523 }
1524 }
1525
1526 #if INCLUDE_ALL_GCS
1527 static void disable_adaptive_size_policy(const char* collector_name) {
1528 if (UseAdaptiveSizePolicy) {
1529 if (FLAG_IS_CMDLINE(UseAdaptiveSizePolicy)) {
1530 warning("Disabling UseAdaptiveSizePolicy; it is incompatible with %s.",
1531 collector_name);
1532 }
1533 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false);
1534 }
1535 }
1536
1537 void Arguments::set_parnew_gc_flags() {
1538 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC && !UseG1GC,
1539 "control point invariant");
1540 assert(UseConcMarkSweepGC, "CMS is expected to be on here");
1541 assert(UseParNewGC, "ParNew should always be used with CMS");
1542
1543 if (FLAG_IS_DEFAULT(ParallelGCThreads)) {
1544 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads());
1545 assert(ParallelGCThreads > 0, "We should always have at least one thread by default");
1546 } else if (ParallelGCThreads == 0) {
1547 jio_fprintf(defaultStream::error_stream(),
1548 "The ParNew GC can not be combined with -XX:ParallelGCThreads=0\n");
1549 vm_exit(1);
1550 }
1551
1552 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 respectively,
1553 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration
1554 // we set them to 1024 and 1024.
1555 // See CR 6362902.
1556 if (FLAG_IS_DEFAULT(YoungPLABSize)) {
1557 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024);
1558 }
1559 if (FLAG_IS_DEFAULT(OldPLABSize)) {
1560 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024);
1561 }
1562
1563 // When using compressed oops, we use local overflow stacks,
1564 // rather than using a global overflow list chained through
1565 // the klass word of the object's pre-image.
1566 if (UseCompressedOops && !ParGCUseLocalOverflow) {
1567 if (!FLAG_IS_DEFAULT(ParGCUseLocalOverflow)) {
1568 warning("Forcing +ParGCUseLocalOverflow: needed if using compressed references");
1569 }
1570 FLAG_SET_DEFAULT(ParGCUseLocalOverflow, true);
1571 }
1572 assert(ParGCUseLocalOverflow || !UseCompressedOops, "Error");
1573 }
1574
1575 // Adjust some sizes to suit CMS and/or ParNew needs; these work well on
1576 // sparc/solaris for certain applications, but would gain from
1577 // further optimization and tuning efforts, and would almost
1578 // certainly gain from analysis of platform and environment.
1579 void Arguments::set_cms_and_parnew_gc_flags() {
1580 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC, "Error");
1581 assert(UseConcMarkSweepGC, "CMS is expected to be on here");
1582 assert(UseParNewGC, "ParNew should always be used with CMS");
1583
1584 // Turn off AdaptiveSizePolicy by default for cms until it is complete.
1585 disable_adaptive_size_policy("UseConcMarkSweepGC");
1586
1587 set_parnew_gc_flags();
1588
1589 size_t max_heap = align_size_down(MaxHeapSize,
1590 CardTableRS::ct_max_alignment_constraint());
1591
1592 // Now make adjustments for CMS
1593 intx tenuring_default = (intx)6;
1594 size_t young_gen_per_worker = CMSYoungGenPerWorker;
1595
1596 // Preferred young gen size for "short" pauses:
1597 // upper bound depends on # of threads and NewRatio.
1598 const size_t preferred_max_new_size_unaligned =
1599 MIN2(max_heap/(NewRatio+1), ScaleForWordSize(young_gen_per_worker * ParallelGCThreads));
1600 size_t preferred_max_new_size =
1601 align_size_up(preferred_max_new_size_unaligned, os::vm_page_size());
1602
1603 // Unless explicitly requested otherwise, size young gen
1604 // for "short" pauses ~ CMSYoungGenPerWorker*ParallelGCThreads
1605
1606 // If either MaxNewSize or NewRatio is set on the command line,
1607 // assume the user is trying to set the size of the young gen.
1608 if (FLAG_IS_DEFAULT(MaxNewSize) && FLAG_IS_DEFAULT(NewRatio)) {
1609
1610 // Set MaxNewSize to our calculated preferred_max_new_size unless
1611 // NewSize was set on the command line and it is larger than
1612 // preferred_max_new_size.
1613 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line
1614 FLAG_SET_ERGO(size_t, MaxNewSize, MAX2(NewSize, preferred_max_new_size));
1615 } else {
1616 FLAG_SET_ERGO(size_t, MaxNewSize, preferred_max_new_size);
1617 }
1618 if (PrintGCDetails && Verbose) {
1619 // Too early to use gclog_or_tty
1620 tty->print_cr("CMS ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize);
1621 }
1622
1623 // Code along this path potentially sets NewSize and OldSize
1624 if (PrintGCDetails && Verbose) {
1625 // Too early to use gclog_or_tty
1626 tty->print_cr("CMS set min_heap_size: " SIZE_FORMAT
1627 " initial_heap_size: " SIZE_FORMAT
1628 " max_heap: " SIZE_FORMAT,
1629 min_heap_size(), InitialHeapSize, max_heap);
1630 }
1631 size_t min_new = preferred_max_new_size;
1632 if (FLAG_IS_CMDLINE(NewSize)) {
1633 min_new = NewSize;
1634 }
1635 if (max_heap > min_new && min_heap_size() > min_new) {
1636 // Unless explicitly requested otherwise, make young gen
1637 // at least min_new, and at most preferred_max_new_size.
1638 if (FLAG_IS_DEFAULT(NewSize)) {
1639 FLAG_SET_ERGO(size_t, NewSize, MAX2(NewSize, min_new));
1640 FLAG_SET_ERGO(size_t, NewSize, MIN2(preferred_max_new_size, NewSize));
1641 if (PrintGCDetails && Verbose) {
1642 // Too early to use gclog_or_tty
1643 tty->print_cr("CMS ergo set NewSize: " SIZE_FORMAT, NewSize);
1644 }
1645 }
1646 // Unless explicitly requested otherwise, size old gen
1647 // so it's NewRatio x of NewSize.
1648 if (FLAG_IS_DEFAULT(OldSize)) {
1649 if (max_heap > NewSize) {
1650 FLAG_SET_ERGO(size_t, OldSize, MIN2(NewRatio*NewSize, max_heap - NewSize));
1651 if (PrintGCDetails && Verbose) {
1652 // Too early to use gclog_or_tty
1653 tty->print_cr("CMS ergo set OldSize: " SIZE_FORMAT, OldSize);
1654 }
1655 }
1656 }
1657 }
1658 }
1659 // Unless explicitly requested otherwise, definitely
1660 // promote all objects surviving "tenuring_default" scavenges.
1661 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) &&
1662 FLAG_IS_DEFAULT(SurvivorRatio)) {
1663 FLAG_SET_ERGO(uintx, MaxTenuringThreshold, tenuring_default);
1664 }
1665 // If we decided above (or user explicitly requested)
1666 // `promote all' (via MaxTenuringThreshold := 0),
1667 // prefer minuscule survivor spaces so as not to waste
1668 // space for (non-existent) survivors
1669 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) {
1670 FLAG_SET_ERGO(uintx, SurvivorRatio, MAX2((uintx)1024, SurvivorRatio));
1671 }
1672
1673 // OldPLABSize is interpreted in CMS as not the size of the PLAB in words,
1674 // but rather the number of free blocks of a given size that are used when
1675 // replenishing the local per-worker free list caches.
1676 if (FLAG_IS_DEFAULT(OldPLABSize)) {
1677 if (!FLAG_IS_DEFAULT(ResizeOldPLAB) && !ResizeOldPLAB) {
1678 // OldPLAB sizing manually turned off: Use a larger default setting,
1679 // unless it was manually specified. This is because a too-low value
1680 // will slow down scavenges.
1681 FLAG_SET_ERGO(size_t, OldPLABSize, CFLS_LAB::_default_static_old_plab_size); // default value before 6631166
1682 } else {
1683 FLAG_SET_DEFAULT(OldPLABSize, CFLS_LAB::_default_dynamic_old_plab_size); // old CMSParPromoteBlocksToClaim default
1684 }
1685 }
1686
1687 // If either of the static initialization defaults have changed, note this
1688 // modification.
1689 if (!FLAG_IS_DEFAULT(OldPLABSize) || !FLAG_IS_DEFAULT(OldPLABWeight)) {
1690 CFLS_LAB::modify_initialization(OldPLABSize, OldPLABWeight);
1691 }
1692
1693 if (!ClassUnloading) {
1694 FLAG_SET_CMDLINE(bool, CMSClassUnloadingEnabled, false);
1695 FLAG_SET_CMDLINE(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false);
1696 }
1697
1698 if (PrintGCDetails && Verbose) {
1699 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk",
1700 (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K));
1701 tty->print_cr("ConcGCThreads: %u", ConcGCThreads);
1702 }
1703 }
1704 #endif // INCLUDE_ALL_GCS
1705
1706 void set_object_alignment() {
1707 // Object alignment.
1708 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2");
1709 MinObjAlignmentInBytes = ObjectAlignmentInBytes;
1710 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small");
1711 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize;
1712 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect");
1713 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1;
1714
1715 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes);
1716 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize;
1717
1718 // Oop encoding heap max
1719 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes;
1720
1721 if (SurvivorAlignmentInBytes == 0) {
1722 SurvivorAlignmentInBytes = ObjectAlignmentInBytes;
1723 }
1724
1725 #if INCLUDE_ALL_GCS
1726 // Set CMS global values
1727 CompactibleFreeListSpace::set_cms_values();
1728 #endif // INCLUDE_ALL_GCS
1729 }
1730
1731 size_t Arguments::max_heap_for_compressed_oops() {
1732 // Avoid sign flip.
1733 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size");
1734 // We need to fit both the NULL page and the heap into the memory budget, while
1735 // keeping alignment constraints of the heap. To guarantee the latter, as the
1736 // NULL page is located before the heap, we pad the NULL page to the conservative
1737 // maximum alignment that the GC may ever impose upon the heap.
1738 size_t displacement_due_to_null_page = align_size_up_(os::vm_page_size(),
1739 _conservative_max_heap_alignment);
1740
1741 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page);
1742 NOT_LP64(ShouldNotReachHere(); return 0);
1743 }
1744
1745 bool Arguments::should_auto_select_low_pause_collector() {
1746 if (UseAutoGCSelectPolicy &&
1747 !FLAG_IS_DEFAULT(MaxGCPauseMillis) &&
1748 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) {
1749 if (PrintGCDetails) {
1750 // Cannot use gclog_or_tty yet.
1751 tty->print_cr("Automatic selection of the low pause collector"
1752 " based on pause goal of %d (ms)", (int) MaxGCPauseMillis);
1753 }
1754 return true;
1755 }
1756 return false;
1757 }
1758
1759 void Arguments::set_use_compressed_oops() {
1760 #ifndef ZERO
1761 #ifdef _LP64
1762 // MaxHeapSize is not set up properly at this point, but
1763 // the only value that can override MaxHeapSize if we are
1764 // to use UseCompressedOops is InitialHeapSize.
1765 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize);
1766
1767 if (max_heap_size <= max_heap_for_compressed_oops()) {
1768 #if !defined(COMPILER1) || defined(TIERED)
1769 if (FLAG_IS_DEFAULT(UseCompressedOops)) {
1770 FLAG_SET_ERGO(bool, UseCompressedOops, true);
1771 }
1772 #endif
1773 } else {
1774 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) {
1775 warning("Max heap size too large for Compressed Oops");
1776 FLAG_SET_DEFAULT(UseCompressedOops, false);
1777 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1778 }
1779 }
1780 #endif // _LP64
1781 #endif // ZERO
1782 }
1783
1784
1785 // NOTE: set_use_compressed_klass_ptrs() must be called after calling
1786 // set_use_compressed_oops().
1787 void Arguments::set_use_compressed_klass_ptrs() {
1788 #ifndef ZERO
1789 #ifdef _LP64
1790 // UseCompressedOops must be on for UseCompressedClassPointers to be on.
1791 if (!UseCompressedOops) {
1792 if (UseCompressedClassPointers) {
1793 warning("UseCompressedClassPointers requires UseCompressedOops");
1794 }
1795 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1796 } else {
1797 // Turn on UseCompressedClassPointers too
1798 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) {
1799 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true);
1800 }
1801 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs.
1802 if (UseCompressedClassPointers) {
1803 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) {
1804 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers");
1805 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1806 }
1807 }
1808 }
1809 #endif // _LP64
1810 #endif // !ZERO
1811 }
1812
1813 void Arguments::set_conservative_max_heap_alignment() {
1814 // The conservative maximum required alignment for the heap is the maximum of
1815 // the alignments imposed by several sources: any requirements from the heap
1816 // itself, the collector policy and the maximum page size we may run the VM
1817 // with.
1818 size_t heap_alignment = GenCollectedHeap::conservative_max_heap_alignment();
1819 #if INCLUDE_ALL_GCS
1820 if (UseParallelGC) {
1821 heap_alignment = ParallelScavengeHeap::conservative_max_heap_alignment();
1822 } else if (UseG1GC) {
1823 heap_alignment = G1CollectedHeap::conservative_max_heap_alignment();
1824 }
1825 #endif // INCLUDE_ALL_GCS
1826 _conservative_max_heap_alignment = MAX4(heap_alignment,
1827 (size_t)os::vm_allocation_granularity(),
1828 os::max_page_size(),
1829 CollectorPolicy::compute_heap_alignment());
1830 }
1831
1832 void Arguments::select_gc_ergonomically() {
1833 if (os::is_server_class_machine()) {
1834 if (should_auto_select_low_pause_collector()) {
1835 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true);
1836 } else {
1837 #if defined(JAVASE_EMBEDDED)
1838 FLAG_SET_ERGO(bool, UseParallelGC, true);
1839 #else
1840 FLAG_SET_ERGO(bool, UseG1GC, true);
1841 #endif
1842 }
1843 } else {
1844 FLAG_SET_ERGO(bool, UseSerialGC, true);
1845 }
1846 }
1847
1848 void Arguments::select_gc() {
1849 if (!gc_selected()) {
1850 select_gc_ergonomically();
1851 guarantee(gc_selected(), "No GC selected");
1852 }
1853 }
1854
1855 void Arguments::set_ergonomics_flags() {
1856 select_gc();
1857
1858 #if defined(COMPILER2) || INCLUDE_JVMCI
1859 // Shared spaces work fine with other GCs but causes bytecode rewriting
1860 // to be disabled, which hurts interpreter performance and decreases
1861 // server performance. When -server is specified, keep the default off
1862 // unless it is asked for. Future work: either add bytecode rewriting
1863 // at link time, or rewrite bytecodes in non-shared methods.
1864 if (!DumpSharedSpaces && !RequireSharedSpaces &&
1865 (FLAG_IS_DEFAULT(UseSharedSpaces) || !UseSharedSpaces)) {
1866 no_shared_spaces("COMPILER2 default: -Xshare:auto | off, have to manually setup to on.");
1867 }
1868 #endif
1869
1870 set_conservative_max_heap_alignment();
1871
1872 #ifndef ZERO
1873 #ifdef _LP64
1874 set_use_compressed_oops();
1875
1876 // set_use_compressed_klass_ptrs() must be called after calling
1877 // set_use_compressed_oops().
1878 set_use_compressed_klass_ptrs();
1879
1880 // Also checks that certain machines are slower with compressed oops
1881 // in vm_version initialization code.
1882 #endif // _LP64
1883 #endif // !ZERO
1884
1885 CodeCacheExtensions::set_ergonomics_flags();
1886 }
1887
1888 void Arguments::set_parallel_gc_flags() {
1889 assert(UseParallelGC || UseParallelOldGC, "Error");
1890 // Enable ParallelOld unless it was explicitly disabled (cmd line or rc file).
1891 if (FLAG_IS_DEFAULT(UseParallelOldGC)) {
1892 FLAG_SET_DEFAULT(UseParallelOldGC, true);
1893 }
1894 FLAG_SET_DEFAULT(UseParallelGC, true);
1895
1896 // If no heap maximum was requested explicitly, use some reasonable fraction
1897 // of the physical memory, up to a maximum of 1GB.
1898 FLAG_SET_DEFAULT(ParallelGCThreads,
1899 Abstract_VM_Version::parallel_worker_threads());
1900 if (ParallelGCThreads == 0) {
1901 jio_fprintf(defaultStream::error_stream(),
1902 "The Parallel GC can not be combined with -XX:ParallelGCThreads=0\n");
1903 vm_exit(1);
1904 }
1905
1906 if (UseAdaptiveSizePolicy) {
1907 // We don't want to limit adaptive heap sizing's freedom to adjust the heap
1908 // unless the user actually sets these flags.
1909 if (FLAG_IS_DEFAULT(MinHeapFreeRatio)) {
1910 FLAG_SET_DEFAULT(MinHeapFreeRatio, 0);
1911 }
1912 if (FLAG_IS_DEFAULT(MaxHeapFreeRatio)) {
1913 FLAG_SET_DEFAULT(MaxHeapFreeRatio, 100);
1914 }
1915 }
1916
1917 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the
1918 // SurvivorRatio has been set, reset their default values to SurvivorRatio +
1919 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger.
1920 // See CR 6362902 for details.
1921 if (!FLAG_IS_DEFAULT(SurvivorRatio)) {
1922 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) {
1923 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2);
1924 }
1925 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) {
1926 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2);
1927 }
1928 }
1929
1930 if (UseParallelOldGC) {
1931 // Par compact uses lower default values since they are treated as
1932 // minimums. These are different defaults because of the different
1933 // interpretation and are not ergonomically set.
1934 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) {
1935 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1);
1936 }
1937 }
1938 }
1939
1940 void Arguments::set_g1_gc_flags() {
1941 assert(UseG1GC, "Error");
1942 #if defined(COMPILER1) || INCLUDE_JVMCI
1943 FastTLABRefill = false;
1944 #endif
1945 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads());
1946 if (ParallelGCThreads == 0) {
1947 assert(!FLAG_IS_DEFAULT(ParallelGCThreads), "The default value for ParallelGCThreads should not be 0.");
1948 vm_exit_during_initialization("The flag -XX:+UseG1GC can not be combined with -XX:ParallelGCThreads=0", NULL);
1949 }
1950
1951 #if INCLUDE_ALL_GCS
1952 if (G1ConcRefinementThreads == 0) {
1953 FLAG_SET_DEFAULT(G1ConcRefinementThreads, ParallelGCThreads);
1954 }
1955 #endif
1956
1957 // MarkStackSize will be set (if it hasn't been set by the user)
1958 // when concurrent marking is initialized.
1959 // Its value will be based upon the number of parallel marking threads.
1960 // But we do set the maximum mark stack size here.
1961 if (FLAG_IS_DEFAULT(MarkStackSizeMax)) {
1962 FLAG_SET_DEFAULT(MarkStackSizeMax, 128 * TASKQUEUE_SIZE);
1963 }
1964
1965 if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) {
1966 // In G1, we want the default GC overhead goal to be higher than
1967 // say in PS. So we set it here to 10%. Otherwise the heap might
1968 // be expanded more aggressively than we would like it to. In
1969 // fact, even 10% seems to not be high enough in some cases
1970 // (especially small GC stress tests that the main thing they do
1971 // is allocation). We might consider increase it further.
1972 FLAG_SET_DEFAULT(GCTimeRatio, 9);
1973 }
1974
1975 if (PrintGCDetails && Verbose) {
1976 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk",
1977 (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K));
1978 tty->print_cr("ConcGCThreads: %u", ConcGCThreads);
1979 }
1980 }
1981
1982 #if !INCLUDE_ALL_GCS
1983 #ifdef ASSERT
1984 static bool verify_serial_gc_flags() {
1985 return (UseSerialGC &&
1986 !(UseParNewGC || (UseConcMarkSweepGC) || UseG1GC ||
1987 UseParallelGC || UseParallelOldGC));
1988 }
1989 #endif // ASSERT
1990 #endif // INCLUDE_ALL_GCS
1991
1992 void Arguments::set_gc_specific_flags() {
1993 #if INCLUDE_ALL_GCS
1994 // Set per-collector flags
1995 if (UseParallelGC || UseParallelOldGC) {
1996 set_parallel_gc_flags();
1997 } else if (UseConcMarkSweepGC) {
1998 set_cms_and_parnew_gc_flags();
1999 } else if (UseG1GC) {
2000 set_g1_gc_flags();
2001 }
2002 if (AssumeMP && !UseSerialGC) {
2003 if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) {
2004 warning("If the number of processors is expected to increase from one, then"
2005 " you should configure the number of parallel GC threads appropriately"
2006 " using -XX:ParallelGCThreads=N");
2007 }
2008 }
2009 if (MinHeapFreeRatio == 100) {
2010 // Keeping the heap 100% free is hard ;-) so limit it to 99%.
2011 FLAG_SET_ERGO(uintx, MinHeapFreeRatio, 99);
2012 }
2013 #else // INCLUDE_ALL_GCS
2014 assert(verify_serial_gc_flags(), "SerialGC unset");
2015 #endif // INCLUDE_ALL_GCS
2016 }
2017
2018 julong Arguments::limit_by_allocatable_memory(julong limit) {
2019 julong max_allocatable;
2020 julong result = limit;
2021 if (os::has_allocatable_memory_limit(&max_allocatable)) {
2022 result = MIN2(result, max_allocatable / MaxVirtMemFraction);
2023 }
2024 return result;
2025 }
2026
2027 // Use static initialization to get the default before parsing
2028 static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress;
2029
2030 void Arguments::set_heap_size() {
2031 const julong phys_mem =
2032 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM)
2033 : (julong)MaxRAM;
2034
2035 // If the maximum heap size has not been set with -Xmx,
2036 // then set it as fraction of the size of physical memory,
2037 // respecting the maximum and minimum sizes of the heap.
2038 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
2039 julong reasonable_max = phys_mem / MaxRAMFraction;
2040
2041 if (phys_mem <= MaxHeapSize * MinRAMFraction) {
2042 // Small physical memory, so use a minimum fraction of it for the heap
2043 reasonable_max = phys_mem / MinRAMFraction;
2044 } else {
2045 // Not-small physical memory, so require a heap at least
2046 // as large as MaxHeapSize
2047 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize);
2048 }
2049 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) {
2050 // Limit the heap size to ErgoHeapSizeLimit
2051 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit);
2052 }
2053 if (UseCompressedOops) {
2054 // Limit the heap size to the maximum possible when using compressed oops
2055 julong max_coop_heap = (julong)max_heap_for_compressed_oops();
2056
2057 // HeapBaseMinAddress can be greater than default but not less than.
2058 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) {
2059 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) {
2060 // matches compressed oops printing flags
2061 if (PrintCompressedOopsMode || (PrintMiscellaneous && Verbose)) {
2062 jio_fprintf(defaultStream::error_stream(),
2063 "HeapBaseMinAddress must be at least " SIZE_FORMAT
2064 " (" SIZE_FORMAT "G) which is greater than value given "
2065 SIZE_FORMAT "\n",
2066 DefaultHeapBaseMinAddress,
2067 DefaultHeapBaseMinAddress/G,
2068 HeapBaseMinAddress);
2069 }
2070 FLAG_SET_ERGO(size_t, HeapBaseMinAddress, DefaultHeapBaseMinAddress);
2071 }
2072 }
2073
2074 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) {
2075 // Heap should be above HeapBaseMinAddress to get zero based compressed oops
2076 // but it should be not less than default MaxHeapSize.
2077 max_coop_heap -= HeapBaseMinAddress;
2078 }
2079 reasonable_max = MIN2(reasonable_max, max_coop_heap);
2080 }
2081 reasonable_max = limit_by_allocatable_memory(reasonable_max);
2082
2083 if (!FLAG_IS_DEFAULT(InitialHeapSize)) {
2084 // An initial heap size was specified on the command line,
2085 // so be sure that the maximum size is consistent. Done
2086 // after call to limit_by_allocatable_memory because that
2087 // method might reduce the allocation size.
2088 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize);
2089 }
2090
2091 if (PrintGCDetails && Verbose) {
2092 // Cannot use gclog_or_tty yet.
2093 tty->print_cr(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max);
2094 }
2095 FLAG_SET_ERGO(size_t, MaxHeapSize, (size_t)reasonable_max);
2096 }
2097
2098 // If the minimum or initial heap_size have not been set or requested to be set
2099 // ergonomically, set them accordingly.
2100 if (InitialHeapSize == 0 || min_heap_size() == 0) {
2101 julong reasonable_minimum = (julong)(OldSize + NewSize);
2102
2103 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize);
2104
2105 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum);
2106
2107 if (InitialHeapSize == 0) {
2108 julong reasonable_initial = phys_mem / InitialRAMFraction;
2109
2110 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size());
2111 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize);
2112
2113 reasonable_initial = limit_by_allocatable_memory(reasonable_initial);
2114
2115 if (PrintGCDetails && Verbose) {
2116 // Cannot use gclog_or_tty yet.
2117 tty->print_cr(" Initial heap size " SIZE_FORMAT, (size_t)reasonable_initial);
2118 }
2119 FLAG_SET_ERGO(size_t, InitialHeapSize, (size_t)reasonable_initial);
2120 }
2121 // If the minimum heap size has not been set (via -Xms),
2122 // synchronize with InitialHeapSize to avoid errors with the default value.
2123 if (min_heap_size() == 0) {
2124 set_min_heap_size(MIN2((size_t)reasonable_minimum, InitialHeapSize));
2125 if (PrintGCDetails && Verbose) {
2126 // Cannot use gclog_or_tty yet.
2127 tty->print_cr(" Minimum heap size " SIZE_FORMAT, min_heap_size());
2128 }
2129 }
2130 }
2131 }
2132
2133 // This option inspects the machine and attempts to set various
2134 // parameters to be optimal for long-running, memory allocation
2135 // intensive jobs. It is intended for machines with large
2136 // amounts of cpu and memory.
2137 jint Arguments::set_aggressive_heap_flags() {
2138 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit
2139 // VM, but we may not be able to represent the total physical memory
2140 // available (like having 8gb of memory on a box but using a 32bit VM).
2141 // Thus, we need to make sure we're using a julong for intermediate
2142 // calculations.
2143 julong initHeapSize;
2144 julong total_memory = os::physical_memory();
2145
2146 if (total_memory < (julong) 256 * M) {
2147 jio_fprintf(defaultStream::error_stream(),
2148 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n");
2149 vm_exit(1);
2150 }
2151
2152 // The heap size is half of available memory, or (at most)
2153 // all of possible memory less 160mb (leaving room for the OS
2154 // when using ISM). This is the maximum; because adaptive sizing
2155 // is turned on below, the actual space used may be smaller.
2156
2157 initHeapSize = MIN2(total_memory / (julong) 2,
2158 total_memory - (julong) 160 * M);
2159
2160 initHeapSize = limit_by_allocatable_memory(initHeapSize);
2161
2162 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
2163 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, initHeapSize) != Flag::SUCCESS) {
2164 return JNI_EINVAL;
2165 }
2166 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, initHeapSize) != Flag::SUCCESS) {
2167 return JNI_EINVAL;
2168 }
2169 // Currently the minimum size and the initial heap sizes are the same.
2170 set_min_heap_size(initHeapSize);
2171 }
2172 if (FLAG_IS_DEFAULT(NewSize)) {
2173 // Make the young generation 3/8ths of the total heap.
2174 if (FLAG_SET_CMDLINE(size_t, NewSize,
2175 ((julong) MaxHeapSize / (julong) 8) * (julong) 3) != Flag::SUCCESS) {
2176 return JNI_EINVAL;
2177 }
2178 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, NewSize) != Flag::SUCCESS) {
2179 return JNI_EINVAL;
2180 }
2181 }
2182
2183 #if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
2184 FLAG_SET_DEFAULT(UseLargePages, true);
2185 #endif
2186
2187 // Increase some data structure sizes for efficiency
2188 if (FLAG_SET_CMDLINE(size_t, BaseFootPrintEstimate, MaxHeapSize) != Flag::SUCCESS) {
2189 return JNI_EINVAL;
2190 }
2191 if (FLAG_SET_CMDLINE(bool, ResizeTLAB, false) != Flag::SUCCESS) {
2192 return JNI_EINVAL;
2193 }
2194 if (FLAG_SET_CMDLINE(size_t, TLABSize, 256 * K) != Flag::SUCCESS) {
2195 return JNI_EINVAL;
2196 }
2197
2198 // See the OldPLABSize comment below, but replace 'after promotion'
2199 // with 'after copying'. YoungPLABSize is the size of the survivor
2200 // space per-gc-thread buffers. The default is 4kw.
2201 if (FLAG_SET_CMDLINE(size_t, YoungPLABSize, 256 * K) != Flag::SUCCESS) { // Note: this is in words
2202 return JNI_EINVAL;
2203 }
2204
2205 // OldPLABSize is the size of the buffers in the old gen that
2206 // UseParallelGC uses to promote live data that doesn't fit in the
2207 // survivor spaces. At any given time, there's one for each gc thread.
2208 // The default size is 1kw. These buffers are rarely used, since the
2209 // survivor spaces are usually big enough. For specjbb, however, there
2210 // are occasions when there's lots of live data in the young gen
2211 // and we end up promoting some of it. We don't have a definite
2212 // explanation for why bumping OldPLABSize helps, but the theory
2213 // is that a bigger PLAB results in retaining something like the
2214 // original allocation order after promotion, which improves mutator
2215 // locality. A minor effect may be that larger PLABs reduce the
2216 // number of PLAB allocation events during gc. The value of 8kw
2217 // was arrived at by experimenting with specjbb.
2218 if (FLAG_SET_CMDLINE(size_t, OldPLABSize, 8 * K) != Flag::SUCCESS) { // Note: this is in words
2219 return JNI_EINVAL;
2220 }
2221
2222 // Enable parallel GC and adaptive generation sizing
2223 if (FLAG_SET_CMDLINE(bool, UseParallelGC, true) != Flag::SUCCESS) {
2224 return JNI_EINVAL;
2225 }
2226 FLAG_SET_DEFAULT(ParallelGCThreads,
2227 Abstract_VM_Version::parallel_worker_threads());
2228
2229 // Encourage steady state memory management
2230 if (FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100) != Flag::SUCCESS) {
2231 return JNI_EINVAL;
2232 }
2233
2234 // This appears to improve mutator locality
2235 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
2236 return JNI_EINVAL;
2237 }
2238
2239 // Get around early Solaris scheduling bug
2240 // (affinity vs other jobs on system)
2241 // but disallow DR and offlining (5008695).
2242 if (FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true) != Flag::SUCCESS) {
2243 return JNI_EINVAL;
2244 }
2245
2246 return JNI_OK;
2247 }
2248
2249 // This must be called after ergonomics.
2250 void Arguments::set_bytecode_flags() {
2251 if (!RewriteBytecodes) {
2252 FLAG_SET_DEFAULT(RewriteFrequentPairs, false);
2253 }
2254 }
2255
2256 // Aggressive optimization flags -XX:+AggressiveOpts
2257 jint Arguments::set_aggressive_opts_flags() {
2258 #ifdef COMPILER2
2259 if (AggressiveUnboxing) {
2260 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
2261 FLAG_SET_DEFAULT(EliminateAutoBox, true);
2262 } else if (!EliminateAutoBox) {
2263 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled");
2264 AggressiveUnboxing = false;
2265 }
2266 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) {
2267 FLAG_SET_DEFAULT(DoEscapeAnalysis, true);
2268 } else if (!DoEscapeAnalysis) {
2269 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled");
2270 AggressiveUnboxing = false;
2271 }
2272 }
2273 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
2274 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
2275 FLAG_SET_DEFAULT(EliminateAutoBox, true);
2276 }
2277 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
2278 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000);
2279 }
2280
2281 // Feed the cache size setting into the JDK
2282 char buffer[1024];
2283 sprintf(buffer, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax);
2284 if (!add_property(buffer)) {
2285 return JNI_ENOMEM;
2286 }
2287 }
2288 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) {
2289 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500);
2290 }
2291 #endif
2292
2293 if (AggressiveOpts) {
2294 // Sample flag setting code
2295 // if (FLAG_IS_DEFAULT(EliminateZeroing)) {
2296 // FLAG_SET_DEFAULT(EliminateZeroing, true);
2297 // }
2298 }
2299
2300 return JNI_OK;
2301 }
2302
2303 //===========================================================================================================
2304 // Parsing of java.compiler property
2305
2306 void Arguments::process_java_compiler_argument(const char* arg) {
2307 // For backwards compatibility, Djava.compiler=NONE or ""
2308 // causes us to switch to -Xint mode UNLESS -Xdebug
2309 // is also specified.
2310 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) {
2311 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen.
2312 }
2313 }
2314
2315 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) {
2316 _sun_java_launcher = os::strdup_check_oom(launcher);
2317 }
2318
2319 bool Arguments::created_by_java_launcher() {
2320 assert(_sun_java_launcher != NULL, "property must have value");
2321 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0;
2322 }
2323
2324 bool Arguments::sun_java_launcher_is_altjvm() {
2325 return _sun_java_launcher_is_altjvm;
2326 }
2327
2328 //===========================================================================================================
2329 // Parsing of main arguments
2330
2331 // check if do gclog rotation
2332 // +UseGCLogFileRotation is a must,
2333 // no gc log rotation when log file not supplied or
2334 // NumberOfGCLogFiles is 0
2335 void check_gclog_consistency() {
2336 if (UseGCLogFileRotation) {
2337 if ((Arguments::gc_log_filename() == NULL) || (NumberOfGCLogFiles == 0)) {
2338 jio_fprintf(defaultStream::output_stream(),
2339 "To enable GC log rotation, use -Xloggc:<filename> -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=<num_of_files>\n"
2340 "where num_of_file > 0\n"
2341 "GC log rotation is turned off\n");
2342 UseGCLogFileRotation = false;
2343 }
2344 }
2345
2346 if (UseGCLogFileRotation && (GCLogFileSize != 0) && (GCLogFileSize < 8*K)) {
2347 if (FLAG_SET_CMDLINE(size_t, GCLogFileSize, 8*K) == Flag::SUCCESS) {
2348 jio_fprintf(defaultStream::output_stream(),
2349 "GCLogFileSize changed to minimum 8K\n");
2350 }
2351 }
2352 }
2353
2354 // This function is called for -Xloggc:<filename>, it can be used
2355 // to check if a given file name(or string) conforms to the following
2356 // specification:
2357 // A valid string only contains "[A-Z][a-z][0-9].-_%[p|t]"
2358 // %p and %t only allowed once. We only limit usage of filename not path
2359 bool is_filename_valid(const char *file_name) {
2360 const char* p = file_name;
2361 char file_sep = os::file_separator()[0];
2362 const char* cp;
2363 // skip prefix path
2364 for (cp = file_name; *cp != '\0'; cp++) {
2365 if (*cp == '/' || *cp == file_sep) {
2366 p = cp + 1;
2367 }
2368 }
2369
2370 int count_p = 0;
2371 int count_t = 0;
2372 while (*p != '\0') {
2373 if ((*p >= '0' && *p <= '9') ||
2374 (*p >= 'A' && *p <= 'Z') ||
2375 (*p >= 'a' && *p <= 'z') ||
2376 *p == '-' ||
2377 *p == '_' ||
2378 *p == '.') {
2379 p++;
2380 continue;
2381 }
2382 if (*p == '%') {
2383 if(*(p + 1) == 'p') {
2384 p += 2;
2385 count_p ++;
2386 continue;
2387 }
2388 if (*(p + 1) == 't') {
2389 p += 2;
2390 count_t ++;
2391 continue;
2392 }
2393 }
2394 return false;
2395 }
2396 return count_p < 2 && count_t < 2;
2397 }
2398
2399 // Check consistency of GC selection
2400 bool Arguments::check_gc_consistency() {
2401 check_gclog_consistency();
2402 // Ensure that the user has not selected conflicting sets
2403 // of collectors.
2404 uint i = 0;
2405 if (UseSerialGC) i++;
2406 if (UseConcMarkSweepGC) i++;
2407 if (UseParallelGC || UseParallelOldGC) i++;
2408 if (UseG1GC) i++;
2409 if (i > 1) {
2410 jio_fprintf(defaultStream::error_stream(),
2411 "Conflicting collector combinations in option list; "
2412 "please refer to the release notes for the combinations "
2413 "allowed\n");
2414 return false;
2415 }
2416
2417 if (UseConcMarkSweepGC && !UseParNewGC) {
2418 jio_fprintf(defaultStream::error_stream(),
2419 "It is not possible to combine the DefNew young collector with the CMS collector.\n");
2420 return false;
2421 }
2422
2423 if (UseParNewGC && !UseConcMarkSweepGC) {
2424 jio_fprintf(defaultStream::error_stream(),
2425 "It is not possible to combine the ParNew young collector with any collector other than CMS.\n");
2426 return false;
2427 }
2428
2429 return true;
2430 }
2431
2432 // Check the consistency of vm_init_args
2433 bool Arguments::check_vm_args_consistency() {
2434 // Method for adding checks for flag consistency.
2435 // The intent is to warn the user of all possible conflicts,
2436 // before returning an error.
2437 // Note: Needs platform-dependent factoring.
2438 bool status = true;
2439
2440 if (TLABRefillWasteFraction == 0) {
2441 jio_fprintf(defaultStream::error_stream(),
2442 "TLABRefillWasteFraction should be a denominator, "
2443 "not " SIZE_FORMAT "\n",
2444 TLABRefillWasteFraction);
2445 status = false;
2446 }
2447
2448 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) {
2449 MarkSweepAlwaysCompactCount = 1; // Move objects every gc.
2450 }
2451
2452 if (!(UseParallelGC || UseParallelOldGC) && FLAG_IS_DEFAULT(ScavengeBeforeFullGC)) {
2453 FLAG_SET_DEFAULT(ScavengeBeforeFullGC, false);
2454 }
2455
2456 if (GCTimeLimit == 100) {
2457 // Turn off gc-overhead-limit-exceeded checks
2458 FLAG_SET_DEFAULT(UseGCOverheadLimit, false);
2459 }
2460
2461 status = status && check_gc_consistency();
2462
2463 // CMS space iteration, which FLSVerifyAllHeapreferences entails,
2464 // insists that we hold the requisite locks so that the iteration is
2465 // MT-safe. For the verification at start-up and shut-down, we don't
2466 // yet have a good way of acquiring and releasing these locks,
2467 // which are not visible at the CollectedHeap level. We want to
2468 // be able to acquire these locks and then do the iteration rather
2469 // than just disable the lock verification. This will be fixed under
2470 // bug 4788986.
2471 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) {
2472 if (VerifyDuringStartup) {
2473 warning("Heap verification at start-up disabled "
2474 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
2475 VerifyDuringStartup = false; // Disable verification at start-up
2476 }
2477
2478 if (VerifyBeforeExit) {
2479 warning("Heap verification at shutdown disabled "
2480 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
2481 VerifyBeforeExit = false; // Disable verification at shutdown
2482 }
2483 }
2484
2485 if (PrintNMTStatistics) {
2486 #if INCLUDE_NMT
2487 if (MemTracker::tracking_level() == NMT_off) {
2488 #endif // INCLUDE_NMT
2489 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled");
2490 PrintNMTStatistics = false;
2491 #if INCLUDE_NMT
2492 }
2493 #endif
2494 }
2495 #if INCLUDE_JVMCI
2496 if (EnableJVMCI) {
2497 if (!ScavengeRootsInCode) {
2498 warning("forcing ScavengeRootsInCode non-zero because JVMCI is enabled");
2499 ScavengeRootsInCode = 1;
2500 }
2501 if (FLAG_IS_DEFAULT(TypeProfileLevel)) {
2502 TypeProfileLevel = 0;
2503 }
2504 if (UseJVMCICompiler) {
2505 if (FLAG_IS_DEFAULT(TypeProfileWidth)) {
2506 TypeProfileWidth = 8;
2507 }
2508 }
2509 }
2510 #endif
2511
2512 // Check lower bounds of the code cache
2513 // Template Interpreter code is approximately 3X larger in debug builds.
2514 uint min_code_cache_size = CodeCacheMinimumUseSpace DEBUG_ONLY(* 3);
2515 if (InitialCodeCacheSize < (uintx)os::vm_page_size()) {
2516 jio_fprintf(defaultStream::error_stream(),
2517 "Invalid InitialCodeCacheSize=%dK. Must be at least %dK.\n", InitialCodeCacheSize/K,
2518 os::vm_page_size()/K);
2519 status = false;
2520 } else if (ReservedCodeCacheSize < InitialCodeCacheSize) {
2521 jio_fprintf(defaultStream::error_stream(),
2522 "Invalid ReservedCodeCacheSize: %dK. Must be at least InitialCodeCacheSize=%dK.\n",
2523 ReservedCodeCacheSize/K, InitialCodeCacheSize/K);
2524 status = false;
2525 } else if (ReservedCodeCacheSize < min_code_cache_size) {
2526 jio_fprintf(defaultStream::error_stream(),
2527 "Invalid ReservedCodeCacheSize=%dK. Must be at least %uK.\n", ReservedCodeCacheSize/K,
2528 min_code_cache_size/K);
2529 status = false;
2530 } else if (ReservedCodeCacheSize > CODE_CACHE_SIZE_LIMIT) {
2531 // Code cache size larger than CODE_CACHE_SIZE_LIMIT is not supported.
2532 jio_fprintf(defaultStream::error_stream(),
2533 "Invalid ReservedCodeCacheSize=%dM. Must be at most %uM.\n", ReservedCodeCacheSize/M,
2534 CODE_CACHE_SIZE_LIMIT/M);
2535 status = false;
2536 } else if (NonNMethodCodeHeapSize < min_code_cache_size){
2537 jio_fprintf(defaultStream::error_stream(),
2538 "Invalid NonNMethodCodeHeapSize=%dK. Must be at least %uK.\n", NonNMethodCodeHeapSize/K,
2539 min_code_cache_size/K);
2540 status = false;
2541 } else if ((!FLAG_IS_DEFAULT(NonNMethodCodeHeapSize) || !FLAG_IS_DEFAULT(ProfiledCodeHeapSize) || !FLAG_IS_DEFAULT(NonProfiledCodeHeapSize))
2542 && (NonNMethodCodeHeapSize + NonProfiledCodeHeapSize + ProfiledCodeHeapSize) != ReservedCodeCacheSize) {
2543 jio_fprintf(defaultStream::error_stream(),
2544 "Invalid code heap sizes: NonNMethodCodeHeapSize(%dK) + ProfiledCodeHeapSize(%dK) + NonProfiledCodeHeapSize(%dK) = %dK. Must be equal to ReservedCodeCacheSize = %uK.\n",
2545 NonNMethodCodeHeapSize/K, ProfiledCodeHeapSize/K, NonProfiledCodeHeapSize/K,
2546 (NonNMethodCodeHeapSize + ProfiledCodeHeapSize + NonProfiledCodeHeapSize)/K, ReservedCodeCacheSize/K);
2547 status = false;
2548 }
2549
2550 if (!FLAG_IS_DEFAULT(CICompilerCount) && !FLAG_IS_DEFAULT(CICompilerCountPerCPU) && CICompilerCountPerCPU) {
2551 warning("The VM option CICompilerCountPerCPU overrides CICompilerCount.");
2552 }
2553
2554 return status;
2555 }
2556
2557 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore,
2558 const char* option_type) {
2559 if (ignore) return false;
2560
2561 const char* spacer = " ";
2562 if (option_type == NULL) {
2563 option_type = ++spacer; // Set both to the empty string.
2564 }
2565
2566 if (os::obsolete_option(option)) {
2567 jio_fprintf(defaultStream::error_stream(),
2568 "Obsolete %s%soption: %s\n", option_type, spacer,
2569 option->optionString);
2570 return false;
2571 } else {
2572 jio_fprintf(defaultStream::error_stream(),
2573 "Unrecognized %s%soption: %s\n", option_type, spacer,
2574 option->optionString);
2575 return true;
2576 }
2577 }
2578
2579 static const char* user_assertion_options[] = {
2580 "-da", "-ea", "-disableassertions", "-enableassertions", 0
2581 };
2582
2583 static const char* system_assertion_options[] = {
2584 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0
2585 };
2586
2587 bool Arguments::parse_uintx(const char* value,
2588 uintx* uintx_arg,
2589 uintx min_size) {
2590
2591 // Check the sign first since atomull() parses only unsigned values.
2592 bool value_is_positive = !(*value == '-');
2593
2594 if (value_is_positive) {
2595 julong n;
2596 bool good_return = atomull(value, &n);
2597 if (good_return) {
2598 bool above_minimum = n >= min_size;
2599 bool value_is_too_large = n > max_uintx;
2600
2601 if (above_minimum && !value_is_too_large) {
2602 *uintx_arg = n;
2603 return true;
2604 }
2605 }
2606 }
2607 return false;
2608 }
2609
2610 Arguments::ArgsRange Arguments::parse_memory_size(const char* s,
2611 julong* long_arg,
2612 julong min_size) {
2613 if (!atomull(s, long_arg)) return arg_unreadable;
2614 return check_memory_size(*long_arg, min_size);
2615 }
2616
2617 // Parse JavaVMInitArgs structure
2618
2619 jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args,
2620 const JavaVMInitArgs *java_options_args,
2621 const JavaVMInitArgs *cmd_line_args) {
2622 // For components of the system classpath.
2623 SysClassPath scp(Arguments::get_sysclasspath());
2624 bool scp_assembly_required = false;
2625
2626 // Save default settings for some mode flags
2627 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
2628 Arguments::_UseOnStackReplacement = UseOnStackReplacement;
2629 Arguments::_ClipInlining = ClipInlining;
2630 Arguments::_BackgroundCompilation = BackgroundCompilation;
2631 if (TieredCompilation) {
2632 Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
2633 Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
2634 }
2635
2636 // Setup flags for mixed which is the default
2637 set_mode_flags(_mixed);
2638
2639 // Parse args structure generated from JAVA_TOOL_OPTIONS environment
2640 // variable (if present).
2641 jint result = parse_each_vm_init_arg(
2642 java_tool_options_args, &scp, &scp_assembly_required, Flag::ENVIRON_VAR);
2643 if (result != JNI_OK) {
2644 return result;
2645 }
2646
2647 // Parse args structure generated from the command line flags.
2648 result = parse_each_vm_init_arg(cmd_line_args, &scp, &scp_assembly_required,
2649 Flag::COMMAND_LINE);
2650 if (result != JNI_OK) {
2651 return result;
2652 }
2653
2654 // Parse args structure generated from the _JAVA_OPTIONS environment
2655 // variable (if present) (mimics classic VM)
2656 result = parse_each_vm_init_arg(
2657 java_options_args, &scp, &scp_assembly_required, Flag::ENVIRON_VAR);
2658 if (result != JNI_OK) {
2659 return result;
2660 }
2661
2662 // Do final processing now that all arguments have been parsed
2663 result = finalize_vm_init_args(&scp, scp_assembly_required);
2664 if (result != JNI_OK) {
2665 return result;
2666 }
2667
2668 return JNI_OK;
2669 }
2670
2671 // Checks if name in command-line argument -agent{lib,path}:name[=options]
2672 // represents a valid JDWP agent. is_path==true denotes that we
2673 // are dealing with -agentpath (case where name is a path), otherwise with
2674 // -agentlib
2675 bool valid_jdwp_agent(char *name, bool is_path) {
2676 char *_name;
2677 const char *_jdwp = "jdwp";
2678 size_t _len_jdwp, _len_prefix;
2679
2680 if (is_path) {
2681 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) {
2682 return false;
2683 }
2684
2685 _name++; // skip past last path separator
2686 _len_prefix = strlen(JNI_LIB_PREFIX);
2687
2688 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) {
2689 return false;
2690 }
2691
2692 _name += _len_prefix;
2693 _len_jdwp = strlen(_jdwp);
2694
2695 if (strncmp(_name, _jdwp, _len_jdwp) == 0) {
2696 _name += _len_jdwp;
2697 }
2698 else {
2699 return false;
2700 }
2701
2702 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) {
2703 return false;
2704 }
2705
2706 return true;
2707 }
2708
2709 if (strcmp(name, _jdwp) == 0) {
2710 return true;
2711 }
2712
2713 return false;
2714 }
2715
2716 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args,
2717 SysClassPath* scp_p,
2718 bool* scp_assembly_required_p,
2719 Flag::Flags origin) {
2720 // Remaining part of option string
2721 const char* tail;
2722
2723 // iterate over arguments
2724 for (int index = 0; index < args->nOptions; index++) {
2725 bool is_absolute_path = false; // for -agentpath vs -agentlib
2726
2727 const JavaVMOption* option = args->options + index;
2728
2729 if (!match_option(option, "-Djava.class.path", &tail) &&
2730 !match_option(option, "-Dsun.java.command", &tail) &&
2731 !match_option(option, "-Dsun.java.launcher", &tail)) {
2732
2733 // add all jvm options to the jvm_args string. This string
2734 // is used later to set the java.vm.args PerfData string constant.
2735 // the -Djava.class.path and the -Dsun.java.command options are
2736 // omitted from jvm_args string as each have their own PerfData
2737 // string constant object.
2738 build_jvm_args(option->optionString);
2739 }
2740
2741 // -verbose:[class/gc/jni]
2742 if (match_option(option, "-verbose", &tail)) {
2743 if (!strcmp(tail, ":class") || !strcmp(tail, "")) {
2744 if (FLAG_SET_CMDLINE(bool, TraceClassLoading, true) != Flag::SUCCESS) {
2745 return JNI_EINVAL;
2746 }
2747 if (FLAG_SET_CMDLINE(bool, TraceClassUnloading, true) != Flag::SUCCESS) {
2748 return JNI_EINVAL;
2749 }
2750 } else if (!strcmp(tail, ":gc")) {
2751 if (FLAG_SET_CMDLINE(bool, PrintGC, true) != Flag::SUCCESS) {
2752 return JNI_EINVAL;
2753 }
2754 } else if (!strcmp(tail, ":jni")) {
2755 if (FLAG_SET_CMDLINE(bool, PrintJNIResolving, true) != Flag::SUCCESS) {
2756 return JNI_EINVAL;
2757 }
2758 }
2759 // -da / -ea / -disableassertions / -enableassertions
2760 // These accept an optional class/package name separated by a colon, e.g.,
2761 // -da:java.lang.Thread.
2762 } else if (match_option(option, user_assertion_options, &tail, true)) {
2763 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2764 if (*tail == '\0') {
2765 JavaAssertions::setUserClassDefault(enable);
2766 } else {
2767 assert(*tail == ':', "bogus match by match_option()");
2768 JavaAssertions::addOption(tail + 1, enable);
2769 }
2770 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions
2771 } else if (match_option(option, system_assertion_options, &tail, false)) {
2772 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2773 JavaAssertions::setSystemClassDefault(enable);
2774 // -bootclasspath:
2775 } else if (match_option(option, "-Xbootclasspath:", &tail)) {
2776 scp_p->reset_path(tail);
2777 *scp_assembly_required_p = true;
2778 // -bootclasspath/a:
2779 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) {
2780 scp_p->add_suffix(tail);
2781 *scp_assembly_required_p = true;
2782 // -bootclasspath/p:
2783 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) {
2784 scp_p->add_prefix(tail);
2785 *scp_assembly_required_p = true;
2786 // -Xrun
2787 } else if (match_option(option, "-Xrun", &tail)) {
2788 if (tail != NULL) {
2789 const char* pos = strchr(tail, ':');
2790 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2791 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len);
2792 name[len] = '\0';
2793
2794 char *options = NULL;
2795 if(pos != NULL) {
2796 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied.
2797 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtInternal), pos+1, len2);
2798 }
2799 #if !INCLUDE_JVMTI
2800 if (strcmp(name, "jdwp") == 0) {
2801 jio_fprintf(defaultStream::error_stream(),
2802 "Debugging agents are not supported in this VM\n");
2803 return JNI_ERR;
2804 }
2805 #endif // !INCLUDE_JVMTI
2806 add_init_library(name, options);
2807 }
2808 // -agentlib and -agentpath
2809 } else if (match_option(option, "-agentlib:", &tail) ||
2810 (is_absolute_path = match_option(option, "-agentpath:", &tail))) {
2811 if(tail != NULL) {
2812 const char* pos = strchr(tail, '=');
2813 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2814 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len);
2815 name[len] = '\0';
2816
2817 char *options = NULL;
2818 if(pos != NULL) {
2819 options = os::strdup_check_oom(pos + 1, mtInternal);
2820 }
2821 #if !INCLUDE_JVMTI
2822 if (valid_jdwp_agent(name, is_absolute_path)) {
2823 jio_fprintf(defaultStream::error_stream(),
2824 "Debugging agents are not supported in this VM\n");
2825 return JNI_ERR;
2826 }
2827 #endif // !INCLUDE_JVMTI
2828 add_init_agent(name, options, is_absolute_path);
2829 }
2830 // -javaagent
2831 } else if (match_option(option, "-javaagent:", &tail)) {
2832 #if !INCLUDE_JVMTI
2833 jio_fprintf(defaultStream::error_stream(),
2834 "Instrumentation agents are not supported in this VM\n");
2835 return JNI_ERR;
2836 #else
2837 if(tail != NULL) {
2838 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1, mtInternal), tail);
2839 add_init_agent("instrument", options, false);
2840 }
2841 #endif // !INCLUDE_JVMTI
2842 // -Xnoclassgc
2843 } else if (match_option(option, "-Xnoclassgc")) {
2844 if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != Flag::SUCCESS) {
2845 return JNI_EINVAL;
2846 }
2847 // -Xconcgc
2848 } else if (match_option(option, "-Xconcgc")) {
2849 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true) != Flag::SUCCESS) {
2850 return JNI_EINVAL;
2851 }
2852 // -Xnoconcgc
2853 } else if (match_option(option, "-Xnoconcgc")) {
2854 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false) != Flag::SUCCESS) {
2855 return JNI_EINVAL;
2856 }
2857 // -Xbatch
2858 } else if (match_option(option, "-Xbatch")) {
2859 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
2860 return JNI_EINVAL;
2861 }
2862 // -Xmn for compatibility with other JVM vendors
2863 } else if (match_option(option, "-Xmn", &tail)) {
2864 julong long_initial_young_size = 0;
2865 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1);
2866 if (errcode != arg_in_range) {
2867 jio_fprintf(defaultStream::error_stream(),
2868 "Invalid initial young generation size: %s\n", option->optionString);
2869 describe_range_error(errcode);
2870 return JNI_EINVAL;
2871 }
2872 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
2873 return JNI_EINVAL;
2874 }
2875 if (FLAG_SET_CMDLINE(size_t, NewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
2876 return JNI_EINVAL;
2877 }
2878 // -Xms
2879 } else if (match_option(option, "-Xms", &tail)) {
2880 julong long_initial_heap_size = 0;
2881 // an initial heap size of 0 means automatically determine
2882 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0);
2883 if (errcode != arg_in_range) {
2884 jio_fprintf(defaultStream::error_stream(),
2885 "Invalid initial heap size: %s\n", option->optionString);
2886 describe_range_error(errcode);
2887 return JNI_EINVAL;
2888 }
2889 set_min_heap_size((size_t)long_initial_heap_size);
2890 // Currently the minimum size and the initial heap sizes are the same.
2891 // Can be overridden with -XX:InitialHeapSize.
2892 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, (size_t)long_initial_heap_size) != Flag::SUCCESS) {
2893 return JNI_EINVAL;
2894 }
2895 // -Xmx
2896 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) {
2897 julong long_max_heap_size = 0;
2898 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1);
2899 if (errcode != arg_in_range) {
2900 jio_fprintf(defaultStream::error_stream(),
2901 "Invalid maximum heap size: %s\n", option->optionString);
2902 describe_range_error(errcode);
2903 return JNI_EINVAL;
2904 }
2905 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, (size_t)long_max_heap_size) != Flag::SUCCESS) {
2906 return JNI_EINVAL;
2907 }
2908 // Xmaxf
2909 } else if (match_option(option, "-Xmaxf", &tail)) {
2910 char* err;
2911 int maxf = (int)(strtod(tail, &err) * 100);
2912 if (*err != '\0' || *tail == '\0') {
2913 jio_fprintf(defaultStream::error_stream(),
2914 "Bad max heap free percentage size: %s\n",
2915 option->optionString);
2916 return JNI_EINVAL;
2917 } else {
2918 if (FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf) != Flag::SUCCESS) {
2919 return JNI_EINVAL;
2920 }
2921 }
2922 // Xminf
2923 } else if (match_option(option, "-Xminf", &tail)) {
2924 char* err;
2925 int minf = (int)(strtod(tail, &err) * 100);
2926 if (*err != '\0' || *tail == '\0') {
2927 jio_fprintf(defaultStream::error_stream(),
2928 "Bad min heap free percentage size: %s\n",
2929 option->optionString);
2930 return JNI_EINVAL;
2931 } else {
2932 if (FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf) != Flag::SUCCESS) {
2933 return JNI_EINVAL;
2934 }
2935 }
2936 // -Xss
2937 } else if (match_option(option, "-Xss", &tail)) {
2938 julong long_ThreadStackSize = 0;
2939 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000);
2940 if (errcode != arg_in_range) {
2941 jio_fprintf(defaultStream::error_stream(),
2942 "Invalid thread stack size: %s\n", option->optionString);
2943 describe_range_error(errcode);
2944 return JNI_EINVAL;
2945 }
2946 // Internally track ThreadStackSize in units of 1024 bytes.
2947 if (FLAG_SET_CMDLINE(intx, ThreadStackSize,
2948 round_to((int)long_ThreadStackSize, K) / K) != Flag::SUCCESS) {
2949 return JNI_EINVAL;
2950 }
2951 // -Xoss, -Xsqnopause, -Xoptimize, -Xboundthreads
2952 } else if (match_option(option, "-Xoss", &tail) ||
2953 match_option(option, "-Xsqnopause") ||
2954 match_option(option, "-Xoptimize") ||
2955 match_option(option, "-Xboundthreads")) {
2956 // All these options are deprecated in JDK 9 and will be removed in a future release
2957 char version[256];
2958 JDK_Version::jdk(9).to_string(version, sizeof(version));
2959 warning("Ignoring option %s; support was removed in %s", option->optionString, version);
2960 } else if (match_option(option, "-XX:CodeCacheExpansionSize=", &tail)) {
2961 julong long_CodeCacheExpansionSize = 0;
2962 ArgsRange errcode = parse_memory_size(tail, &long_CodeCacheExpansionSize, os::vm_page_size());
2963 if (errcode != arg_in_range) {
2964 jio_fprintf(defaultStream::error_stream(),
2965 "Invalid argument: %s. Must be at least %luK.\n", option->optionString,
2966 os::vm_page_size()/K);
2967 return JNI_EINVAL;
2968 }
2969 if (FLAG_SET_CMDLINE(uintx, CodeCacheExpansionSize, (uintx)long_CodeCacheExpansionSize) != Flag::SUCCESS) {
2970 return JNI_EINVAL;
2971 }
2972 } else if (match_option(option, "-Xmaxjitcodesize", &tail) ||
2973 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) {
2974 julong long_ReservedCodeCacheSize = 0;
2975
2976 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1);
2977 if (errcode != arg_in_range) {
2978 jio_fprintf(defaultStream::error_stream(),
2979 "Invalid maximum code cache size: %s.\n", option->optionString);
2980 return JNI_EINVAL;
2981 }
2982 if (FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != Flag::SUCCESS) {
2983 return JNI_EINVAL;
2984 }
2985 // -XX:NonNMethodCodeHeapSize=
2986 } else if (match_option(option, "-XX:NonNMethodCodeHeapSize=", &tail)) {
2987 julong long_NonNMethodCodeHeapSize = 0;
2988
2989 ArgsRange errcode = parse_memory_size(tail, &long_NonNMethodCodeHeapSize, 1);
2990 if (errcode != arg_in_range) {
2991 jio_fprintf(defaultStream::error_stream(),
2992 "Invalid maximum non-nmethod code heap size: %s.\n", option->optionString);
2993 return JNI_EINVAL;
2994 }
2995 if (FLAG_SET_CMDLINE(uintx, NonNMethodCodeHeapSize, (uintx)long_NonNMethodCodeHeapSize) != Flag::SUCCESS) {
2996 return JNI_EINVAL;
2997 }
2998 // -XX:ProfiledCodeHeapSize=
2999 } else if (match_option(option, "-XX:ProfiledCodeHeapSize=", &tail)) {
3000 julong long_ProfiledCodeHeapSize = 0;
3001
3002 ArgsRange errcode = parse_memory_size(tail, &long_ProfiledCodeHeapSize, 1);
3003 if (errcode != arg_in_range) {
3004 jio_fprintf(defaultStream::error_stream(),
3005 "Invalid maximum profiled code heap size: %s.\n", option->optionString);
3006 return JNI_EINVAL;
3007 }
3008 if (FLAG_SET_CMDLINE(uintx, ProfiledCodeHeapSize, (uintx)long_ProfiledCodeHeapSize) != Flag::SUCCESS) {
3009 return JNI_EINVAL;
3010 }
3011 // -XX:NonProfiledCodeHeapSizee=
3012 } else if (match_option(option, "-XX:NonProfiledCodeHeapSize=", &tail)) {
3013 julong long_NonProfiledCodeHeapSize = 0;
3014
3015 ArgsRange errcode = parse_memory_size(tail, &long_NonProfiledCodeHeapSize, 1);
3016 if (errcode != arg_in_range) {
3017 jio_fprintf(defaultStream::error_stream(),
3018 "Invalid maximum non-profiled code heap size: %s.\n", option->optionString);
3019 return JNI_EINVAL;
3020 }
3021 if (FLAG_SET_CMDLINE(uintx, NonProfiledCodeHeapSize, (uintx)long_NonProfiledCodeHeapSize) != Flag::SUCCESS) {
3022 return JNI_EINVAL;
3023 }
3024 // -green
3025 } else if (match_option(option, "-green")) {
3026 jio_fprintf(defaultStream::error_stream(),
3027 "Green threads support not available\n");
3028 return JNI_EINVAL;
3029 // -native
3030 } else if (match_option(option, "-native")) {
3031 // HotSpot always uses native threads, ignore silently for compatibility
3032 // -Xrs
3033 } else if (match_option(option, "-Xrs")) {
3034 // Classic/EVM option, new functionality
3035 if (FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true) != Flag::SUCCESS) {
3036 return JNI_EINVAL;
3037 }
3038 } else if (match_option(option, "-Xusealtsigs")) {
3039 // change default internal VM signals used - lower case for back compat
3040 if (FLAG_SET_CMDLINE(bool, UseAltSigs, true) != Flag::SUCCESS) {
3041 return JNI_EINVAL;
3042 }
3043 // -Xprof
3044 } else if (match_option(option, "-Xprof")) {
3045 #if INCLUDE_FPROF
3046 _has_profile = true;
3047 #else // INCLUDE_FPROF
3048 jio_fprintf(defaultStream::error_stream(),
3049 "Flat profiling is not supported in this VM.\n");
3050 return JNI_ERR;
3051 #endif // INCLUDE_FPROF
3052 // -Xconcurrentio
3053 } else if (match_option(option, "-Xconcurrentio")) {
3054 if (FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true) != Flag::SUCCESS) {
3055 return JNI_EINVAL;
3056 }
3057 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
3058 return JNI_EINVAL;
3059 }
3060 if (FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1) != Flag::SUCCESS) {
3061 return JNI_EINVAL;
3062 }
3063 if (FLAG_SET_CMDLINE(bool, UseTLAB, false) != Flag::SUCCESS) {
3064 return JNI_EINVAL;
3065 }
3066 if (FLAG_SET_CMDLINE(size_t, NewSizeThreadIncrease, 16 * K) != Flag::SUCCESS) { // 20Kb per thread added to new generation
3067 return JNI_EINVAL;
3068 }
3069
3070 // -Xinternalversion
3071 } else if (match_option(option, "-Xinternalversion")) {
3072 jio_fprintf(defaultStream::output_stream(), "%s\n",
3073 VM_Version::internal_vm_info_string());
3074 vm_exit(0);
3075 #ifndef PRODUCT
3076 // -Xprintflags
3077 } else if (match_option(option, "-Xprintflags")) {
3078 CommandLineFlags::printFlags(tty, false);
3079 vm_exit(0);
3080 #endif
3081 // -D
3082 } else if (match_option(option, "-D", &tail)) {
3083 const char* value;
3084 if (match_option(option, "-Djava.endorsed.dirs=", &value) &&
3085 *value!= '\0' && strcmp(value, "\"\"") != 0) {
3086 // abort if -Djava.endorsed.dirs is set
3087 jio_fprintf(defaultStream::output_stream(),
3088 "-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n"
3089 "in modular form will be supported via the concept of upgradeable modules.\n", value);
3090 return JNI_EINVAL;
3091 }
3092 if (match_option(option, "-Djava.ext.dirs=", &value) &&
3093 *value != '\0' && strcmp(value, "\"\"") != 0) {
3094 // abort if -Djava.ext.dirs is set
3095 jio_fprintf(defaultStream::output_stream(),
3096 "-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value);
3097 return JNI_EINVAL;
3098 }
3099
3100 if (!add_property(tail)) {
3101 return JNI_ENOMEM;
3102 }
3103 // Out of the box management support
3104 if (match_option(option, "-Dcom.sun.management", &tail)) {
3105 #if INCLUDE_MANAGEMENT
3106 if (FLAG_SET_CMDLINE(bool, ManagementServer, true) != Flag::SUCCESS) {
3107 return JNI_EINVAL;
3108 }
3109 #else
3110 jio_fprintf(defaultStream::output_stream(),
3111 "-Dcom.sun.management is not supported in this VM.\n");
3112 return JNI_ERR;
3113 #endif
3114 }
3115 // -Xint
3116 } else if (match_option(option, "-Xint")) {
3117 set_mode_flags(_int);
3118 // -Xmixed
3119 } else if (match_option(option, "-Xmixed")) {
3120 set_mode_flags(_mixed);
3121 // -Xcomp
3122 } else if (match_option(option, "-Xcomp")) {
3123 // for testing the compiler; turn off all flags that inhibit compilation
3124 set_mode_flags(_comp);
3125 // -Xshare:dump
3126 } else if (match_option(option, "-Xshare:dump")) {
3127 if (FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true) != Flag::SUCCESS) {
3128 return JNI_EINVAL;
3129 }
3130 set_mode_flags(_int); // Prevent compilation, which creates objects
3131 // -Xshare:on
3132 } else if (match_option(option, "-Xshare:on")) {
3133 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
3134 return JNI_EINVAL;
3135 }
3136 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
3137 return JNI_EINVAL;
3138 }
3139 // -Xshare:auto
3140 } else if (match_option(option, "-Xshare:auto")) {
3141 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
3142 return JNI_EINVAL;
3143 }
3144 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
3145 return JNI_EINVAL;
3146 }
3147 // -Xshare:off
3148 } else if (match_option(option, "-Xshare:off")) {
3149 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, false) != Flag::SUCCESS) {
3150 return JNI_EINVAL;
3151 }
3152 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
3153 return JNI_EINVAL;
3154 }
3155 // -Xverify
3156 } else if (match_option(option, "-Xverify", &tail)) {
3157 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) {
3158 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true) != Flag::SUCCESS) {
3159 return JNI_EINVAL;
3160 }
3161 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
3162 return JNI_EINVAL;
3163 }
3164 } else if (strcmp(tail, ":remote") == 0) {
3165 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
3166 return JNI_EINVAL;
3167 }
3168 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
3169 return JNI_EINVAL;
3170 }
3171 } else if (strcmp(tail, ":none") == 0) {
3172 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
3173 return JNI_EINVAL;
3174 }
3175 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false) != Flag::SUCCESS) {
3176 return JNI_EINVAL;
3177 }
3178 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) {
3179 return JNI_EINVAL;
3180 }
3181 // -Xdebug
3182 } else if (match_option(option, "-Xdebug")) {
3183 // note this flag has been used, then ignore
3184 set_xdebug_mode(true);
3185 // -Xnoagent
3186 } else if (match_option(option, "-Xnoagent")) {
3187 // For compatibility with classic. HotSpot refuses to load the old style agent.dll.
3188 } else if (match_option(option, "-Xloggc:", &tail)) {
3189 // Redirect GC output to the file. -Xloggc:<filename>
3190 // ostream_init_log(), when called will use this filename
3191 // to initialize a fileStream.
3192 _gc_log_filename = os::strdup_check_oom(tail);
3193 if (!is_filename_valid(_gc_log_filename)) {
3194 jio_fprintf(defaultStream::output_stream(),
3195 "Invalid file name for use with -Xloggc: Filename can only contain the "
3196 "characters [A-Z][a-z][0-9]-_.%%[p|t] but it has been %s\n"
3197 "Note %%p or %%t can only be used once\n", _gc_log_filename);
3198 return JNI_EINVAL;
3199 }
3200 if (FLAG_SET_CMDLINE(bool, PrintGC, true) != Flag::SUCCESS) {
3201 return JNI_EINVAL;
3202 }
3203 if (FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true) != Flag::SUCCESS) {
3204 return JNI_EINVAL;
3205 }
3206 } else if (match_option(option, "-Xlog", &tail)) {
3207 bool ret = false;
3208 if (strcmp(tail, ":help") == 0) {
3209 LogConfiguration::print_command_line_help(defaultStream::output_stream());
3210 vm_exit(0);
3211 } else if (strcmp(tail, ":disable") == 0) {
3212 LogConfiguration::disable_logging();
3213 ret = true;
3214 } else if (*tail == '\0') {
3215 ret = LogConfiguration::parse_command_line_arguments();
3216 assert(ret, "-Xlog without arguments should never fail to parse");
3217 } else if (*tail == ':') {
3218 ret = LogConfiguration::parse_command_line_arguments(tail + 1);
3219 }
3220 if (ret == false) {
3221 jio_fprintf(defaultStream::error_stream(),
3222 "Invalid -Xlog option '-Xlog%s'\n",
3223 tail);
3224 return JNI_EINVAL;
3225 }
3226 // JNI hooks
3227 } else if (match_option(option, "-Xcheck", &tail)) {
3228 if (!strcmp(tail, ":jni")) {
3229 #if !INCLUDE_JNI_CHECK
3230 warning("JNI CHECKING is not supported in this VM");
3231 #else
3232 CheckJNICalls = true;
3233 #endif // INCLUDE_JNI_CHECK
3234 } else if (is_bad_option(option, args->ignoreUnrecognized,
3235 "check")) {
3236 return JNI_EINVAL;
3237 }
3238 } else if (match_option(option, "vfprintf")) {
3239 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo);
3240 } else if (match_option(option, "exit")) {
3241 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo);
3242 } else if (match_option(option, "abort")) {
3243 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo);
3244 // -XX:+AggressiveHeap
3245 } else if (match_option(option, "-XX:+AggressiveHeap")) {
3246 jint result = set_aggressive_heap_flags();
3247 if (result != JNI_OK) {
3248 return result;
3249 }
3250 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure;
3251 // and the last option wins.
3252 } else if (match_option(option, "-XX:+NeverTenure")) {
3253 if (FLAG_SET_CMDLINE(bool, NeverTenure, true) != Flag::SUCCESS) {
3254 return JNI_EINVAL;
3255 }
3256 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
3257 return JNI_EINVAL;
3258 }
3259 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1) != Flag::SUCCESS) {
3260 return JNI_EINVAL;
3261 }
3262 } else if (match_option(option, "-XX:+AlwaysTenure")) {
3263 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3264 return JNI_EINVAL;
3265 }
3266 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
3267 return JNI_EINVAL;
3268 }
3269 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0) != Flag::SUCCESS) {
3270 return JNI_EINVAL;
3271 }
3272 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) {
3273 uintx max_tenuring_thresh = 0;
3274 if (!parse_uintx(tail, &max_tenuring_thresh, 0)) {
3275 jio_fprintf(defaultStream::error_stream(),
3276 "Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail);
3277 return JNI_EINVAL;
3278 }
3279
3280 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh) != Flag::SUCCESS) {
3281 return JNI_EINVAL;
3282 }
3283
3284 if (MaxTenuringThreshold == 0) {
3285 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3286 return JNI_EINVAL;
3287 }
3288 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
3289 return JNI_EINVAL;
3290 }
3291 } else {
3292 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3293 return JNI_EINVAL;
3294 }
3295 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
3296 return JNI_EINVAL;
3297 }
3298 }
3299 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) {
3300 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false) != Flag::SUCCESS) {
3301 return JNI_EINVAL;
3302 }
3303 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true) != Flag::SUCCESS) {
3304 return JNI_EINVAL;
3305 }
3306 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) {
3307 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false) != Flag::SUCCESS) {
3308 return JNI_EINVAL;
3309 }
3310 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true) != Flag::SUCCESS) {
3311 return JNI_EINVAL;
3312 }
3313 } else if (match_option(option, "-XX:+ExtendedDTraceProbes")) {
3314 #if defined(DTRACE_ENABLED)
3315 if (FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true) != Flag::SUCCESS) {
3316 return JNI_EINVAL;
3317 }
3318 if (FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true) != Flag::SUCCESS) {
3319 return JNI_EINVAL;
3320 }
3321 if (FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true) != Flag::SUCCESS) {
3322 return JNI_EINVAL;
3323 }
3324 if (FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true) != Flag::SUCCESS) {
3325 return JNI_EINVAL;
3326 }
3327 #else // defined(DTRACE_ENABLED)
3328 jio_fprintf(defaultStream::error_stream(),
3329 "ExtendedDTraceProbes flag is not applicable for this configuration\n");
3330 return JNI_EINVAL;
3331 #endif // defined(DTRACE_ENABLED)
3332 #ifdef ASSERT
3333 } else if (match_option(option, "-XX:+FullGCALot")) {
3334 if (FLAG_SET_CMDLINE(bool, FullGCALot, true) != Flag::SUCCESS) {
3335 return JNI_EINVAL;
3336 }
3337 // disable scavenge before parallel mark-compact
3338 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
3339 return JNI_EINVAL;
3340 }
3341 #endif
3342 #if !INCLUDE_MANAGEMENT
3343 } else if (match_option(option, "-XX:+ManagementServer")) {
3344 jio_fprintf(defaultStream::error_stream(),
3345 "ManagementServer is not supported in this VM.\n");
3346 return JNI_ERR;
3347 #endif // INCLUDE_MANAGEMENT
3348 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx
3349 // Skip -XX:Flags= and -XX:VMOptionsFile= since those cases have
3350 // already been handled
3351 if ((strncmp(tail, "Flags=", strlen("Flags=")) != 0) &&
3352 (strncmp(tail, "VMOptionsFile=", strlen("VMOptionsFile=")) != 0)) {
3353 if (!process_argument(tail, args->ignoreUnrecognized, origin)) {
3354 return JNI_EINVAL;
3355 }
3356 }
3357 // Unknown option
3358 } else if (is_bad_option(option, args->ignoreUnrecognized)) {
3359 return JNI_ERR;
3360 }
3361 }
3362
3363 // PrintSharedArchiveAndExit will turn on
3364 // -Xshare:on
3365 // -XX:+TraceClassPaths
3366 if (PrintSharedArchiveAndExit) {
3367 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
3368 return JNI_EINVAL;
3369 }
3370 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
3371 return JNI_EINVAL;
3372 }
3373 if (FLAG_SET_CMDLINE(bool, TraceClassPaths, true) != Flag::SUCCESS) {
3374 return JNI_EINVAL;
3375 }
3376 }
3377
3378 // Change the default value for flags which have different default values
3379 // when working with older JDKs.
3380 #ifdef LINUX
3381 if (JDK_Version::current().compare_major(6) <= 0 &&
3382 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) {
3383 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false);
3384 }
3385 #endif // LINUX
3386 fix_appclasspath();
3387 return JNI_OK;
3388 }
3389
3390 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled)
3391 //
3392 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar
3393 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar".
3394 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty
3395 // path is treated as the current directory.
3396 //
3397 // This causes problems with CDS, which requires that all directories specified in the classpath
3398 // must be empty. In most cases, applications do NOT want to load classes from the current
3399 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up
3400 // scripts compatible with CDS.
3401 void Arguments::fix_appclasspath() {
3402 if (IgnoreEmptyClassPaths) {
3403 const char separator = *os::path_separator();
3404 const char* src = _java_class_path->value();
3405
3406 // skip over all the leading empty paths
3407 while (*src == separator) {
3408 src ++;
3409 }
3410
3411 char* copy = os::strdup_check_oom(src, mtInternal);
3412
3413 // trim all trailing empty paths
3414 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) {
3415 *tail = '\0';
3416 }
3417
3418 char from[3] = {separator, separator, '\0'};
3419 char to [2] = {separator, '\0'};
3420 while (StringUtils::replace_no_expand(copy, from, to) > 0) {
3421 // Keep replacing "::" -> ":" until we have no more "::" (non-windows)
3422 // Keep replacing ";;" -> ";" until we have no more ";;" (windows)
3423 }
3424
3425 _java_class_path->set_value(copy);
3426 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore
3427 }
3428
3429 if (!PrintSharedArchiveAndExit) {
3430 ClassLoader::trace_class_path("[classpath: ", _java_class_path->value());
3431 }
3432 }
3433
3434 static bool has_jar_files(const char* directory) {
3435 DIR* dir = os::opendir(directory);
3436 if (dir == NULL) return false;
3437
3438 struct dirent *entry;
3439 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtInternal);
3440 bool hasJarFile = false;
3441 while (!hasJarFile && (entry = os::readdir(dir, (dirent *) dbuf)) != NULL) {
3442 const char* name = entry->d_name;
3443 const char* ext = name + strlen(name) - 4;
3444 hasJarFile = ext > name && (os::file_name_strcmp(ext, ".jar") == 0);
3445 }
3446 FREE_C_HEAP_ARRAY(char, dbuf);
3447 os::closedir(dir);
3448 return hasJarFile ;
3449 }
3450
3451 static int check_non_empty_dirs(const char* path) {
3452 const char separator = *os::path_separator();
3453 const char* const end = path + strlen(path);
3454 int nonEmptyDirs = 0;
3455 while (path < end) {
3456 const char* tmp_end = strchr(path, separator);
3457 if (tmp_end == NULL) {
3458 if (has_jar_files(path)) {
3459 nonEmptyDirs++;
3460 jio_fprintf(defaultStream::output_stream(),
3461 "Non-empty directory: %s\n", path);
3462 }
3463 path = end;
3464 } else {
3465 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1, mtInternal);
3466 memcpy(dirpath, path, tmp_end - path);
3467 dirpath[tmp_end - path] = '\0';
3468 if (has_jar_files(dirpath)) {
3469 nonEmptyDirs++;
3470 jio_fprintf(defaultStream::output_stream(),
3471 "Non-empty directory: %s\n", dirpath);
3472 }
3473 FREE_C_HEAP_ARRAY(char, dirpath);
3474 path = tmp_end + 1;
3475 }
3476 }
3477 return nonEmptyDirs;
3478 }
3479
3480 jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) {
3481 // check if the default lib/endorsed directory exists; if so, error
3482 char path[JVM_MAXPATHLEN];
3483 const char* fileSep = os::file_separator();
3484 sprintf(path, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep);
3485
3486 #if INCLUDE_JVMCI
3487 jint res = JVMCIRuntime::save_options(_system_properties);
3488 if (res != JNI_OK) {
3489 return res;
3490 }
3491
3492 if (EnableJVMCI) {
3493 // Append lib/jvmci/*.jar to boot class path
3494 char jvmciDir[JVM_MAXPATHLEN];
3495 const char* fileSep = os::file_separator();
3496 jio_snprintf(jvmciDir, sizeof(jvmciDir), "%s%slib%sjvmci", Arguments::get_java_home(), fileSep, fileSep);
3497 DIR* dir = os::opendir(jvmciDir);
3498 if (dir != NULL) {
3499 struct dirent *entry;
3500 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(jvmciDir), mtInternal);
3501 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL) {
3502 const char* name = entry->d_name;
3503 const char* ext = name + strlen(name) - 4;
3504 if (ext > name && strcmp(ext, ".jar") == 0) {
3505 char fileName[JVM_MAXPATHLEN];
3506 jio_snprintf(fileName, sizeof(fileName), "%s%s%s", jvmciDir, fileSep, name);
3507 scp_p->add_suffix(fileName);
3508 scp_assembly_required = true;
3509 }
3510 }
3511 FREE_C_HEAP_ARRAY(char, dbuf);
3512 os::closedir(dir);
3513 }
3514 }
3515 #endif // INCLUDE_JVMCI
3516
3517 if (CheckEndorsedAndExtDirs) {
3518 int nonEmptyDirs = 0;
3519 // check endorsed directory
3520 nonEmptyDirs += check_non_empty_dirs(path);
3521 // check the extension directories
3522 nonEmptyDirs += check_non_empty_dirs(Arguments::get_ext_dirs());
3523 if (nonEmptyDirs > 0) {
3524 return JNI_ERR;
3525 }
3526 }
3527
3528 DIR* dir = os::opendir(path);
3529 if (dir != NULL) {
3530 jio_fprintf(defaultStream::output_stream(),
3531 "<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n"
3532 "in modular form will be supported via the concept of upgradeable modules.\n");
3533 os::closedir(dir);
3534 return JNI_ERR;
3535 }
3536
3537 sprintf(path, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep);
3538 dir = os::opendir(path);
3539 if (dir != NULL) {
3540 jio_fprintf(defaultStream::output_stream(),
3541 "<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; "
3542 "Use -classpath instead.\n.");
3543 os::closedir(dir);
3544 return JNI_ERR;
3545 }
3546
3547 if (scp_assembly_required) {
3548 // Assemble the bootclasspath elements into the final path.
3549 char *combined_path = scp_p->combined_path();
3550 Arguments::set_sysclasspath(combined_path);
3551 FREE_C_HEAP_ARRAY(char, combined_path);
3552 }
3553
3554 // This must be done after all arguments have been processed.
3555 // java_compiler() true means set to "NONE" or empty.
3556 if (java_compiler() && !xdebug_mode()) {
3557 // For backwards compatibility, we switch to interpreted mode if
3558 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was
3559 // not specified.
3560 set_mode_flags(_int);
3561 }
3562
3563 // CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode),
3564 // but like -Xint, leave compilation thresholds unaffected.
3565 // With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well.
3566 if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) {
3567 set_mode_flags(_int);
3568 }
3569
3570 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set
3571 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) {
3572 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold);
3573 }
3574
3575 #if !defined(COMPILER2) && !INCLUDE_JVMCI
3576 // Don't degrade server performance for footprint
3577 if (FLAG_IS_DEFAULT(UseLargePages) &&
3578 MaxHeapSize < LargePageHeapSizeThreshold) {
3579 // No need for large granularity pages w/small heaps.
3580 // Note that large pages are enabled/disabled for both the
3581 // Java heap and the code cache.
3582 FLAG_SET_DEFAULT(UseLargePages, false);
3583 }
3584
3585 #elif defined(COMPILER2)
3586 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) {
3587 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1);
3588 }
3589 #endif
3590
3591 #ifndef TIERED
3592 // Tiered compilation is undefined.
3593 UNSUPPORTED_OPTION(TieredCompilation, "TieredCompilation");
3594 #endif
3595
3596 // If we are running in a headless jre, force java.awt.headless property
3597 // to be true unless the property has already been set.
3598 // Also allow the OS environment variable JAVA_AWT_HEADLESS to set headless state.
3599 if (os::is_headless_jre()) {
3600 const char* headless = Arguments::get_property("java.awt.headless");
3601 if (headless == NULL) {
3602 const char *headless_env = ::getenv("JAVA_AWT_HEADLESS");
3603 if (headless_env == NULL) {
3604 if (!add_property("java.awt.headless=true")) {
3605 return JNI_ENOMEM;
3606 }
3607 } else {
3608 char buffer[256];
3609 jio_snprintf(buffer, sizeof(buffer), "java.awt.headless=%s", headless_env);
3610 if (!add_property(buffer)) {
3611 return JNI_ENOMEM;
3612 }
3613 }
3614 }
3615 }
3616
3617 if (UseConcMarkSweepGC && FLAG_IS_DEFAULT(UseParNewGC) && !UseParNewGC) {
3618 // CMS can only be used with ParNew
3619 FLAG_SET_ERGO(bool, UseParNewGC, true);
3620 }
3621
3622 if (!check_vm_args_consistency()) {
3623 return JNI_ERR;
3624 }
3625
3626 return JNI_OK;
3627 }
3628
3629 // Helper class for controlling the lifetime of JavaVMInitArgs
3630 // objects. The contents of the JavaVMInitArgs are guaranteed to be
3631 // deleted on the destruction of the ScopedVMInitArgs object.
3632 class ScopedVMInitArgs : public StackObj {
3633 private:
3634 JavaVMInitArgs _args;
3635 bool _is_set;
3636
3637 public:
3638 ScopedVMInitArgs() {
3639 _args.version = JNI_VERSION_1_2;
3640 _args.nOptions = 0;
3641 _args.options = NULL;
3642 _args.ignoreUnrecognized = false;
3643 _is_set = false;
3644 }
3645
3646 // Populates the JavaVMInitArgs object represented by this
3647 // ScopedVMInitArgs object with the arguments in options. The
3648 // allocated memory is deleted by the destructor. If this method
3649 // returns anything other than JNI_OK, then this object is in a
3650 // partially constructed state, and should be abandoned.
3651 jint set_args(GrowableArray<JavaVMOption>* options) {
3652 _is_set = true;
3653 JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL(
3654 JavaVMOption, options->length(), mtInternal);
3655 if (options_arr == NULL) {
3656 return JNI_ENOMEM;
3657 }
3658 _args.options = options_arr;
3659
3660 for (int i = 0; i < options->length(); i++) {
3661 options_arr[i] = options->at(i);
3662 options_arr[i].optionString = os::strdup(options_arr[i].optionString);
3663 if (options_arr[i].optionString == NULL) {
3664 // Rely on the destructor to do cleanup.
3665 _args.nOptions = i;
3666 return JNI_ENOMEM;
3667 }
3668 }
3669
3670 _args.nOptions = options->length();
3671 _args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions;
3672 return JNI_OK;
3673 }
3674
3675 JavaVMInitArgs* get() { return &_args; }
3676 bool is_set() { return _is_set; }
3677
3678 ~ScopedVMInitArgs() {
3679 if (_args.options == NULL) return;
3680 for (int i = 0; i < _args.nOptions; i++) {
3681 os::free(_args.options[i].optionString);
3682 }
3683 FREE_C_HEAP_ARRAY(JavaVMOption, _args.options);
3684 }
3685
3686 // Insert options into this option list, to replace option at
3687 // vm_options_file_pos (-XX:VMOptionsFile)
3688 jint insert(const JavaVMInitArgs* args,
3689 const JavaVMInitArgs* args_to_insert,
3690 const int vm_options_file_pos) {
3691 assert(_args.options == NULL, "shouldn't be set yet");
3692 assert(args_to_insert->nOptions != 0, "there should be args to insert");
3693 assert(vm_options_file_pos != -1, "vm_options_file_pos should be set");
3694
3695 int length = args->nOptions + args_to_insert->nOptions - 1;
3696 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtInternal)
3697 GrowableArray<JavaVMOption>(length, true); // Construct new option array
3698 for (int i = 0; i < args->nOptions; i++) {
3699 if (i == vm_options_file_pos) {
3700 // insert the new options starting at the same place as the
3701 // -XX:VMOptionsFile option
3702 for (int j = 0; j < args_to_insert->nOptions; j++) {
3703 options->push(args_to_insert->options[j]);
3704 }
3705 } else {
3706 options->push(args->options[i]);
3707 }
3708 }
3709 // make into options array
3710 jint result = set_args(options);
3711 delete options;
3712 return result;
3713 }
3714 };
3715
3716 jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) {
3717 return parse_options_environment_variable("_JAVA_OPTIONS", args);
3718 }
3719
3720 jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) {
3721 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args);
3722 }
3723
3724 jint Arguments::parse_options_environment_variable(const char* name,
3725 ScopedVMInitArgs* vm_args) {
3726 char *buffer = ::getenv(name);
3727
3728 // Don't check this environment variable if user has special privileges
3729 // (e.g. unix su command).
3730 if (buffer == NULL || os::have_special_privileges()) {
3731 return JNI_OK;
3732 }
3733
3734 if ((buffer = os::strdup(buffer)) == NULL) {
3735 return JNI_ENOMEM;
3736 }
3737
3738 int retcode = parse_options_buffer(name, buffer, strlen(buffer), vm_args);
3739
3740 os::free(buffer);
3741 return retcode;
3742 }
3743
3744 jint Arguments::parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args) {
3745 // read file into buffer
3746 int fd = ::open(file_name, O_RDONLY);
3747 if (fd < 0) {
3748 jio_fprintf(defaultStream::error_stream(),
3749 "Could not open options file '%s'\n",
3750 file_name);
3751 return JNI_ERR;
3752 }
3753
3754 struct stat stbuf;
3755 int retcode = os::stat(file_name, &stbuf);
3756 if (retcode != 0) {
3757 jio_fprintf(defaultStream::error_stream(),
3758 "Could not stat options file '%s'\n",
3759 file_name);
3760 os::close(fd);
3761 return JNI_ERR;
3762 }
3763
3764 if (stbuf.st_size == 0) {
3765 // tell caller there is no option data and that is ok
3766 os::close(fd);
3767 return JNI_OK;
3768 }
3769
3770 // '+ 1' for NULL termination even with max bytes
3771 size_t bytes_alloc = stbuf.st_size + 1;
3772
3773 char *buf = NEW_C_HEAP_ARRAY_RETURN_NULL(char, bytes_alloc, mtInternal);
3774 if (NULL == buf) {
3775 jio_fprintf(defaultStream::error_stream(),
3776 "Could not allocate read buffer for options file parse\n");
3777 os::close(fd);
3778 return JNI_ENOMEM;
3779 }
3780
3781 memset(buf, 0, bytes_alloc);
3782
3783 // Fill buffer
3784 // Use ::read() instead of os::read because os::read()
3785 // might do a thread state transition
3786 // and it is too early for that here
3787
3788 ssize_t bytes_read = ::read(fd, (void *)buf, (unsigned)bytes_alloc);
3789 os::close(fd);
3790 if (bytes_read < 0) {
3791 FREE_C_HEAP_ARRAY(char, buf);
3792 jio_fprintf(defaultStream::error_stream(),
3793 "Could not read options file '%s'\n", file_name);
3794 return JNI_ERR;
3795 }
3796
3797 if (bytes_read == 0) {
3798 // tell caller there is no option data and that is ok
3799 FREE_C_HEAP_ARRAY(char, buf);
3800 return JNI_OK;
3801 }
3802
3803 retcode = parse_options_buffer(file_name, buf, bytes_read, vm_args);
3804
3805 FREE_C_HEAP_ARRAY(char, buf);
3806 return retcode;
3807 }
3808
3809 jint Arguments::parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args) {
3810 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JavaVMOption>(2, true); // Construct option array
3811
3812 // some pointers to help with parsing
3813 char *buffer_end = buffer + buf_len;
3814 char *opt_hd = buffer;
3815 char *wrt = buffer;
3816 char *rd = buffer;
3817
3818 // parse all options
3819 while (rd < buffer_end) {
3820 // skip leading white space from the input string
3821 while (rd < buffer_end && isspace(*rd)) {
3822 rd++;
3823 }
3824
3825 if (rd >= buffer_end) {
3826 break;
3827 }
3828
3829 // Remember this is where we found the head of the token.
3830 opt_hd = wrt;
3831
3832 // Tokens are strings of non white space characters separated
3833 // by one or more white spaces.
3834 while (rd < buffer_end && !isspace(*rd)) {
3835 if (*rd == '\'' || *rd == '"') { // handle a quoted string
3836 int quote = *rd; // matching quote to look for
3837 rd++; // don't copy open quote
3838 while (rd < buffer_end && *rd != quote) {
3839 // include everything (even spaces)
3840 // up until the close quote
3841 *wrt++ = *rd++; // copy to option string
3842 }
3843
3844 if (rd < buffer_end) {
3845 rd++; // don't copy close quote
3846 } else {
3847 // did not see closing quote
3848 jio_fprintf(defaultStream::error_stream(),
3849 "Unmatched quote in %s\n", name);
3850 delete options;
3851 return JNI_ERR;
3852 }
3853 } else {
3854 *wrt++ = *rd++; // copy to option string
3855 }
3856 }
3857
3858 // steal a white space character and set it to NULL
3859 *wrt++ = '\0';
3860 // We now have a complete token
3861
3862 JavaVMOption option;
3863 option.optionString = opt_hd;
3864 option.extraInfo = NULL;
3865
3866 options->append(option); // Fill in option
3867
3868 rd++; // Advance to next character
3869 }
3870
3871 // Fill out JavaVMInitArgs structure.
3872 jint status = vm_args->set_args(options);
3873
3874 delete options;
3875 return status;
3876 }
3877
3878 void Arguments::set_shared_spaces_flags() {
3879 if (DumpSharedSpaces) {
3880 if (RequireSharedSpaces) {
3881 warning("Cannot dump shared archive while using shared archive");
3882 }
3883 UseSharedSpaces = false;
3884 #ifdef _LP64
3885 if (!UseCompressedOops || !UseCompressedClassPointers) {
3886 vm_exit_during_initialization(
3887 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL);
3888 }
3889 } else {
3890 if (!UseCompressedOops || !UseCompressedClassPointers) {
3891 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces.");
3892 }
3893 #endif
3894 }
3895 }
3896
3897 #if !INCLUDE_ALL_GCS
3898 static void force_serial_gc() {
3899 FLAG_SET_DEFAULT(UseSerialGC, true);
3900 UNSUPPORTED_GC_OPTION(UseG1GC);
3901 UNSUPPORTED_GC_OPTION(UseParallelGC);
3902 UNSUPPORTED_GC_OPTION(UseParallelOldGC);
3903 UNSUPPORTED_GC_OPTION(UseConcMarkSweepGC);
3904 UNSUPPORTED_GC_OPTION(UseParNewGC);
3905 }
3906 #endif // INCLUDE_ALL_GCS
3907
3908 // Sharing support
3909 // Construct the path to the archive
3910 static char* get_shared_archive_path() {
3911 char *shared_archive_path;
3912 if (SharedArchiveFile == NULL) {
3913 char jvm_path[JVM_MAXPATHLEN];
3914 os::jvm_path(jvm_path, sizeof(jvm_path));
3915 char *end = strrchr(jvm_path, *os::file_separator());
3916 if (end != NULL) *end = '\0';
3917 size_t jvm_path_len = strlen(jvm_path);
3918 size_t file_sep_len = strlen(os::file_separator());
3919 const size_t len = jvm_path_len + file_sep_len + 20;
3920 shared_archive_path = NEW_C_HEAP_ARRAY(char, len, mtInternal);
3921 if (shared_archive_path != NULL) {
3922 jio_snprintf(shared_archive_path, len, "%s%sclasses.jsa",
3923 jvm_path, os::file_separator());
3924 }
3925 } else {
3926 shared_archive_path = os::strdup_check_oom(SharedArchiveFile, mtInternal);
3927 }
3928 return shared_archive_path;
3929 }
3930
3931 #ifndef PRODUCT
3932 // Determine whether LogVMOutput should be implicitly turned on.
3933 static bool use_vm_log() {
3934 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) ||
3935 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods ||
3936 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers ||
3937 PrintAssembly || TraceDeoptimization || TraceDependencies ||
3938 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) {
3939 return true;
3940 }
3941
3942 #ifdef COMPILER1
3943 if (PrintC1Statistics) {
3944 return true;
3945 }
3946 #endif // COMPILER1
3947
3948 #ifdef COMPILER2
3949 if (PrintOptoAssembly || PrintOptoStatistics) {
3950 return true;
3951 }
3952 #endif // COMPILER2
3953
3954 return false;
3955 }
3956
3957 #endif // PRODUCT
3958
3959 jint Arguments::insert_vm_options_file(const JavaVMInitArgs* args,
3960 char** flags_file,
3961 char** vm_options_file,
3962 const int vm_options_file_pos,
3963 ScopedVMInitArgs *vm_options_file_args,
3964 ScopedVMInitArgs* args_out) {
3965 jint code = parse_vm_options_file(*vm_options_file, vm_options_file_args);
3966 if (code != JNI_OK) {
3967 return code;
3968 }
3969
3970 if (vm_options_file_args->get()->nOptions < 1) {
3971 return JNI_OK;
3972 }
3973
3974 return args_out->insert(args, vm_options_file_args->get(),
3975 vm_options_file_pos);
3976 }
3977
3978 jint Arguments::match_special_option_and_act(const JavaVMInitArgs* args,
3979 char ** flags_file,
3980 char ** vm_options_file,
3981 ScopedVMInitArgs* vm_options_file_args,
3982 ScopedVMInitArgs* args_out) {
3983 // Remaining part of option string
3984 const char* tail;
3985 int vm_options_file_pos = -1;
3986
3987 for (int index = 0; index < args->nOptions; index++) {
3988 const JavaVMOption* option = args->options + index;
3989 if (ArgumentsExt::process_options(option)) {
3990 continue;
3991 }
3992 if (match_option(option, "-XX:Flags=", &tail)) {
3993 *flags_file = (char *) tail;
3994 if (*flags_file == NULL) {
3995 jio_fprintf(defaultStream::error_stream(),
3996 "Cannot copy flags_file name.\n");
3997 return JNI_ENOMEM;
3998 }
3999 continue;
4000 }
4001 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
4002 if (vm_options_file != NULL) {
4003 // The caller accepts -XX:VMOptionsFile
4004 if (*vm_options_file != NULL) {
4005 jio_fprintf(defaultStream::error_stream(),
4006 "The VM Options file can only be specified once and "
4007 "only on the command line.\n");
4008 return JNI_EINVAL;
4009 }
4010
4011 *vm_options_file = (char *) tail;
4012 vm_options_file_pos = index; // save position of -XX:VMOptionsFile
4013 // If there's a VMOptionsFile, parse that (also can set flags_file)
4014 jint code = insert_vm_options_file(args, flags_file, vm_options_file,
4015 vm_options_file_pos,
4016 vm_options_file_args, args_out);
4017 if (code != JNI_OK) {
4018 return code;
4019 }
4020 if (args_out->is_set()) {
4021 // The VMOptions file inserted some options so switch 'args'
4022 // to the new set of options, and continue processing which
4023 // preserves "last option wins" semantics.
4024 args = args_out->get();
4025 // The first option from the VMOptionsFile replaces the
4026 // current option. So we back track to process the
4027 // replacement option.
4028 index--;
4029 }
4030 } else {
4031 jio_fprintf(defaultStream::error_stream(),
4032 "VM options file is only supported on the command line\n");
4033 return JNI_EINVAL;
4034 }
4035 continue;
4036 }
4037 if (match_option(option, "-XX:+PrintVMOptions")) {
4038 PrintVMOptions = true;
4039 continue;
4040 }
4041 if (match_option(option, "-XX:-PrintVMOptions")) {
4042 PrintVMOptions = false;
4043 continue;
4044 }
4045 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) {
4046 IgnoreUnrecognizedVMOptions = true;
4047 continue;
4048 }
4049 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) {
4050 IgnoreUnrecognizedVMOptions = false;
4051 continue;
4052 }
4053 if (match_option(option, "-XX:+PrintFlagsInitial")) {
4054 CommandLineFlags::printFlags(tty, false);
4055 vm_exit(0);
4056 }
4057 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) {
4058 #if INCLUDE_NMT
4059 // The launcher did not setup nmt environment variable properly.
4060 if (!MemTracker::check_launcher_nmt_support(tail)) {
4061 warning("Native Memory Tracking did not setup properly, using wrong launcher?");
4062 }
4063
4064 // Verify if nmt option is valid.
4065 if (MemTracker::verify_nmt_option()) {
4066 // Late initialization, still in single-threaded mode.
4067 if (MemTracker::tracking_level() >= NMT_summary) {
4068 MemTracker::init();
4069 }
4070 } else {
4071 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL);
4072 }
4073 continue;
4074 #else
4075 jio_fprintf(defaultStream::error_stream(),
4076 "Native Memory Tracking is not supported in this VM\n");
4077 return JNI_ERR;
4078 #endif
4079 }
4080
4081 #ifndef PRODUCT
4082 if (match_option(option, "-XX:+PrintFlagsWithComments")) {
4083 CommandLineFlags::printFlags(tty, true);
4084 vm_exit(0);
4085 }
4086 #endif
4087 }
4088 return JNI_OK;
4089 }
4090
4091 static void print_options(const JavaVMInitArgs *args) {
4092 const char* tail;
4093 for (int index = 0; index < args->nOptions; index++) {
4094 const JavaVMOption *option = args->options + index;
4095 if (match_option(option, "-XX:", &tail)) {
4096 logOption(tail);
4097 }
4098 }
4099 }
4100
4101 // Parse entry point called from JNI_CreateJavaVM
4102
4103 jint Arguments::parse(const JavaVMInitArgs* args) {
4104 assert(verify_special_jvm_flags(), "deprecated and obsolete flag table inconsistent");
4105
4106 // Initialize ranges and constraints
4107 CommandLineFlagRangeList::init();
4108 CommandLineFlagConstraintList::init();
4109
4110 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed.
4111 const char* hotspotrc = ".hotspotrc";
4112 char* flags_file = NULL;
4113 char* vm_options_file = NULL;
4114 bool settings_file_specified = false;
4115 bool needs_hotspotrc_warning = false;
4116 ScopedVMInitArgs java_tool_options_args;
4117 ScopedVMInitArgs java_options_args;
4118 ScopedVMInitArgs modified_cmd_line_args;
4119 // Pass in vm_options_file_args to keep memory for flags_file from being
4120 // deallocated if found in the vm options file.
4121 ScopedVMInitArgs vm_options_file_args;
4122
4123 jint code =
4124 parse_java_tool_options_environment_variable(&java_tool_options_args);
4125 if (code != JNI_OK) {
4126 return code;
4127 }
4128
4129 code = parse_java_options_environment_variable(&java_options_args);
4130 if (code != JNI_OK) {
4131 return code;
4132 }
4133
4134 code = match_special_option_and_act(java_tool_options_args.get(),
4135 &flags_file, NULL, NULL, NULL);
4136 if (code != JNI_OK) {
4137 return code;
4138 }
4139
4140 code = match_special_option_and_act(args, &flags_file, &vm_options_file,
4141 &vm_options_file_args,
4142 &modified_cmd_line_args);
4143 if (code != JNI_OK) {
4144 return code;
4145 }
4146
4147
4148 // The command line arguments have been modified to include VMOptionsFile arguments.
4149 if (modified_cmd_line_args.is_set()) {
4150 args = modified_cmd_line_args.get();
4151 }
4152
4153 code = match_special_option_and_act(java_options_args.get(), &flags_file,
4154 NULL, NULL, NULL);
4155 if (code != JNI_OK) {
4156 return code;
4157 }
4158
4159 settings_file_specified = (flags_file != NULL);
4160
4161 if (IgnoreUnrecognizedVMOptions) {
4162 // uncast const to modify the flag args->ignoreUnrecognized
4163 *(jboolean*)(&args->ignoreUnrecognized) = true;
4164 java_tool_options_args.get()->ignoreUnrecognized = true;
4165 java_options_args.get()->ignoreUnrecognized = true;
4166 }
4167
4168 // Parse specified settings file
4169 if (settings_file_specified) {
4170 if (!process_settings_file(flags_file, true, args->ignoreUnrecognized)) {
4171 return JNI_EINVAL;
4172 }
4173 } else {
4174 #ifdef ASSERT
4175 // Parse default .hotspotrc settings file
4176 if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) {
4177 return JNI_EINVAL;
4178 }
4179 #else
4180 struct stat buf;
4181 if (os::stat(hotspotrc, &buf) == 0) {
4182 needs_hotspotrc_warning = true;
4183 }
4184 #endif
4185 }
4186
4187 if (PrintVMOptions) {
4188 print_options(java_tool_options_args.get());
4189 print_options(args);
4190 print_options(java_options_args.get());
4191 }
4192
4193 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS
4194 jint result = parse_vm_init_args(java_tool_options_args.get(),
4195 java_options_args.get(),
4196 args); // command line arguments
4197
4198 if (result != JNI_OK) {
4199 return result;
4200 }
4201
4202 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed.
4203 SharedArchivePath = get_shared_archive_path();
4204 if (SharedArchivePath == NULL) {
4205 return JNI_ENOMEM;
4206 }
4207
4208 // Set up VerifySharedSpaces
4209 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) {
4210 VerifySharedSpaces = true;
4211 }
4212
4213 // Delay warning until here so that we've had a chance to process
4214 // the -XX:-PrintWarnings flag
4215 if (needs_hotspotrc_warning) {
4216 warning("%s file is present but has been ignored. "
4217 "Run with -XX:Flags=%s to load the file.",
4218 hotspotrc, hotspotrc);
4219 }
4220
4221 #if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
4222 UNSUPPORTED_OPTION(UseLargePages, "-XX:+UseLargePages");
4223 #endif
4224
4225 ArgumentsExt::report_unsupported_options();
4226
4227 #ifndef PRODUCT
4228 if (TraceBytecodesAt != 0) {
4229 TraceBytecodes = true;
4230 }
4231 if (CountCompiledCalls) {
4232 if (UseCounterDecay) {
4233 warning("UseCounterDecay disabled because CountCalls is set");
4234 UseCounterDecay = false;
4235 }
4236 }
4237 #endif // PRODUCT
4238
4239 if (ScavengeRootsInCode == 0) {
4240 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) {
4241 warning("Forcing ScavengeRootsInCode non-zero");
4242 }
4243 ScavengeRootsInCode = 1;
4244 }
4245
4246 if (PrintGCDetails) {
4247 // Turn on -verbose:gc options as well
4248 PrintGC = true;
4249 }
4250
4251 // Set object alignment values.
4252 set_object_alignment();
4253
4254 #if !INCLUDE_ALL_GCS
4255 force_serial_gc();
4256 #endif // INCLUDE_ALL_GCS
4257 #if !INCLUDE_CDS
4258 if (DumpSharedSpaces || RequireSharedSpaces) {
4259 jio_fprintf(defaultStream::error_stream(),
4260 "Shared spaces are not supported in this VM\n");
4261 return JNI_ERR;
4262 }
4263 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) || PrintSharedSpaces) {
4264 warning("Shared spaces are not supported in this VM");
4265 FLAG_SET_DEFAULT(UseSharedSpaces, false);
4266 FLAG_SET_DEFAULT(PrintSharedSpaces, false);
4267 }
4268 no_shared_spaces("CDS Disabled");
4269 #endif // INCLUDE_CDS
4270
4271 return JNI_OK;
4272 }
4273
4274 jint Arguments::apply_ergo() {
4275
4276 // Set flags based on ergonomics.
4277 set_ergonomics_flags();
4278
4279 set_shared_spaces_flags();
4280
4281 // Check the GC selections again.
4282 if (!check_gc_consistency()) {
4283 return JNI_EINVAL;
4284 }
4285
4286 if (TieredCompilation) {
4287 set_tiered_flags();
4288 } else {
4289 int max_compilation_policy_choice = 1;
4290 #ifdef COMPILER2
4291 max_compilation_policy_choice = 2;
4292 #endif
4293 // Check if the policy is valid.
4294 if (CompilationPolicyChoice >= max_compilation_policy_choice) {
4295 vm_exit_during_initialization(
4296 "Incompatible compilation policy selected", NULL);
4297 }
4298 // Scale CompileThreshold
4299 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves CompileThreshold unchanged.
4300 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
4301 FLAG_SET_ERGO(intx, CompileThreshold, scaled_compile_threshold(CompileThreshold));
4302 }
4303 }
4304
4305 #ifdef COMPILER2
4306 #ifndef PRODUCT
4307 if (PrintIdealGraphLevel > 0) {
4308 FLAG_SET_ERGO(bool, PrintIdealGraph, true);
4309 }
4310 #endif
4311 #endif
4312
4313 // Set heap size based on available physical memory
4314 set_heap_size();
4315
4316 ArgumentsExt::set_gc_specific_flags();
4317
4318 // Initialize Metaspace flags and alignments
4319 Metaspace::ergo_initialize();
4320
4321 // Set bytecode rewriting flags
4322 set_bytecode_flags();
4323
4324 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled
4325 jint code = set_aggressive_opts_flags();
4326 if (code != JNI_OK) {
4327 return code;
4328 }
4329
4330 // Turn off biased locking for locking debug mode flags,
4331 // which are subtly different from each other but neither works with
4332 // biased locking
4333 if (UseHeavyMonitors
4334 #ifdef COMPILER1
4335 || !UseFastLocking
4336 #endif // COMPILER1
4337 #if INCLUDE_JVMCI
4338 || !JVMCIUseFastLocking
4339 #endif
4340 ) {
4341 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) {
4342 // flag set to true on command line; warn the user that they
4343 // can't enable biased locking here
4344 warning("Biased Locking is not supported with locking debug flags"
4345 "; ignoring UseBiasedLocking flag." );
4346 }
4347 UseBiasedLocking = false;
4348 }
4349
4350 #ifdef ZERO
4351 // Clear flags not supported on zero.
4352 FLAG_SET_DEFAULT(ProfileInterpreter, false);
4353 FLAG_SET_DEFAULT(UseBiasedLocking, false);
4354 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false));
4355 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false));
4356 #endif // CC_INTERP
4357
4358 #ifdef COMPILER2
4359 if (!EliminateLocks) {
4360 EliminateNestedLocks = false;
4361 }
4362 if (!Inline) {
4363 IncrementalInline = false;
4364 }
4365 #ifndef PRODUCT
4366 if (!IncrementalInline) {
4367 AlwaysIncrementalInline = false;
4368 }
4369 #endif
4370 if (!UseTypeSpeculation && FLAG_IS_DEFAULT(TypeProfileLevel)) {
4371 // nothing to use the profiling, turn if off
4372 FLAG_SET_DEFAULT(TypeProfileLevel, 0);
4373 }
4374 #endif
4375
4376 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) {
4377 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output");
4378 DebugNonSafepoints = true;
4379 }
4380
4381 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) {
4382 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used");
4383 }
4384
4385 #ifndef PRODUCT
4386 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) {
4387 if (use_vm_log()) {
4388 LogVMOutput = true;
4389 }
4390 }
4391 #endif // PRODUCT
4392
4393 if (PrintCommandLineFlags) {
4394 CommandLineFlags::printSetFlags(tty);
4395 }
4396
4397 // Apply CPU specific policy for the BiasedLocking
4398 if (UseBiasedLocking) {
4399 if (!VM_Version::use_biased_locking() &&
4400 !(FLAG_IS_CMDLINE(UseBiasedLocking))) {
4401 UseBiasedLocking = false;
4402 }
4403 }
4404 #ifdef COMPILER2
4405 if (!UseBiasedLocking || EmitSync != 0) {
4406 UseOptoBiasInlining = false;
4407 }
4408 #endif
4409
4410 return JNI_OK;
4411 }
4412
4413 jint Arguments::adjust_after_os() {
4414 if (UseNUMA) {
4415 if (UseParallelGC || UseParallelOldGC) {
4416 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) {
4417 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M);
4418 }
4419 }
4420 // UseNUMAInterleaving is set to ON for all collectors and
4421 // platforms when UseNUMA is set to ON. NUMA-aware collectors
4422 // such as the parallel collector for Linux and Solaris will
4423 // interleave old gen and survivor spaces on top of NUMA
4424 // allocation policy for the eden space.
4425 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on
4426 // all platforms and ParallelGC on Windows will interleave all
4427 // of the heap spaces across NUMA nodes.
4428 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) {
4429 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true);
4430 }
4431 }
4432 return JNI_OK;
4433 }
4434
4435 int Arguments::PropertyList_count(SystemProperty* pl) {
4436 int count = 0;
4437 while(pl != NULL) {
4438 count++;
4439 pl = pl->next();
4440 }
4441 return count;
4442 }
4443
4444 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) {
4445 assert(key != NULL, "just checking");
4446 SystemProperty* prop;
4447 for (prop = pl; prop != NULL; prop = prop->next()) {
4448 if (strcmp(key, prop->key()) == 0) return prop->value();
4449 }
4450 return NULL;
4451 }
4452
4453 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) {
4454 int count = 0;
4455 const char* ret_val = NULL;
4456
4457 while(pl != NULL) {
4458 if(count >= index) {
4459 ret_val = pl->key();
4460 break;
4461 }
4462 count++;
4463 pl = pl->next();
4464 }
4465
4466 return ret_val;
4467 }
4468
4469 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) {
4470 int count = 0;
4471 char* ret_val = NULL;
4472
4473 while(pl != NULL) {
4474 if(count >= index) {
4475 ret_val = pl->value();
4476 break;
4477 }
4478 count++;
4479 pl = pl->next();
4480 }
4481
4482 return ret_val;
4483 }
4484
4485 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) {
4486 SystemProperty* p = *plist;
4487 if (p == NULL) {
4488 *plist = new_p;
4489 } else {
4490 while (p->next() != NULL) {
4491 p = p->next();
4492 }
4493 p->set_next(new_p);
4494 }
4495 }
4496
4497 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v) {
4498 if (plist == NULL)
4499 return;
4500
4501 SystemProperty* new_p = new SystemProperty(k, v, true);
4502 PropertyList_add(plist, new_p);
4503 }
4504
4505 void Arguments::PropertyList_add(SystemProperty *element) {
4506 PropertyList_add(&_system_properties, element);
4507 }
4508
4509 // This add maintains unique property key in the list.
4510 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v, jboolean append) {
4511 if (plist == NULL)
4512 return;
4513
4514 // If property key exist then update with new value.
4515 SystemProperty* prop;
4516 for (prop = *plist; prop != NULL; prop = prop->next()) {
4517 if (strcmp(k, prop->key()) == 0) {
4518 if (append) {
4519 prop->append_value(v);
4520 } else {
4521 prop->set_value(v);
4522 }
4523 return;
4524 }
4525 }
4526
4527 PropertyList_add(plist, k, v);
4528 }
4529
4530 // Copies src into buf, replacing "%%" with "%" and "%p" with pid
4531 // Returns true if all of the source pointed by src has been copied over to
4532 // the destination buffer pointed by buf. Otherwise, returns false.
4533 // Notes:
4534 // 1. If the length (buflen) of the destination buffer excluding the
4535 // NULL terminator character is not long enough for holding the expanded
4536 // pid characters, it also returns false instead of returning the partially
4537 // expanded one.
4538 // 2. The passed in "buflen" should be large enough to hold the null terminator.
4539 bool Arguments::copy_expand_pid(const char* src, size_t srclen,
4540 char* buf, size_t buflen) {
4541 const char* p = src;
4542 char* b = buf;
4543 const char* src_end = &src[srclen];
4544 char* buf_end = &buf[buflen - 1];
4545
4546 while (p < src_end && b < buf_end) {
4547 if (*p == '%') {
4548 switch (*(++p)) {
4549 case '%': // "%%" ==> "%"
4550 *b++ = *p++;
4551 break;
4552 case 'p': { // "%p" ==> current process id
4553 // buf_end points to the character before the last character so
4554 // that we could write '\0' to the end of the buffer.
4555 size_t buf_sz = buf_end - b + 1;
4556 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id());
4557
4558 // if jio_snprintf fails or the buffer is not long enough to hold
4559 // the expanded pid, returns false.
4560 if (ret < 0 || ret >= (int)buf_sz) {
4561 return false;
4562 } else {
4563 b += ret;
4564 assert(*b == '\0', "fail in copy_expand_pid");
4565 if (p == src_end && b == buf_end + 1) {
4566 // reach the end of the buffer.
4567 return true;
4568 }
4569 }
4570 p++;
4571 break;
4572 }
4573 default :
4574 *b++ = '%';
4575 }
4576 } else {
4577 *b++ = *p++;
4578 }
4579 }
4580 *b = '\0';
4581 return (p == src_end); // return false if not all of the source was copied
4582 }