1 /*
2 * Copyright (c) 1997, 2017, 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 "jvm.h"
27 #include "classfile/classLoader.hpp"
28 #include "classfile/javaAssertions.hpp"
29 #include "classfile/moduleEntry.hpp"
30 #include "classfile/stringTable.hpp"
31 #include "classfile/symbolTable.hpp"
32 #include "gc/shared/cardTableRS.hpp"
33 #include "gc/shared/genCollectedHeap.hpp"
34 #include "gc/shared/referenceProcessor.hpp"
35 #include "gc/shared/taskqueue.hpp"
36 #include "logging/log.hpp"
37 #include "logging/logConfiguration.hpp"
38 #include "logging/logStream.hpp"
39 #include "logging/logTag.hpp"
40 #include "memory/allocation.inline.hpp"
41 #include "memory/universe.inline.hpp"
42 #include "oops/oop.inline.hpp"
43 #include "prims/jvmtiExport.hpp"
44 #include "runtime/arguments.hpp"
45 #include "runtime/arguments_ext.hpp"
46 #include "runtime/commandLineFlagConstraintList.hpp"
47 #include "runtime/commandLineFlagWriteableList.hpp"
48 #include "runtime/commandLineFlagRangeList.hpp"
49 #include "runtime/globals.hpp"
50 #include "runtime/globals_extension.hpp"
51 #include "runtime/java.hpp"
52 #include "runtime/os.hpp"
53 #include "runtime/vm_version.hpp"
54 #include "services/management.hpp"
55 #include "services/memTracker.hpp"
56 #include "utilities/align.hpp"
57 #include "utilities/defaultStream.hpp"
58 #include "utilities/macros.hpp"
59 #include "utilities/stringUtils.hpp"
60 #if INCLUDE_JVMCI
61 #include "jvmci/jvmciRuntime.hpp"
62 #endif
63 #if INCLUDE_ALL_GCS
64 #include "gc/cms/compactibleFreeListSpace.hpp"
65 #include "gc/g1/g1CollectedHeap.inline.hpp"
66 #include "gc/parallel/parallelScavengeHeap.hpp"
67 #endif // INCLUDE_ALL_GCS
68
69 // Note: This is a special bug reporting site for the JVM
70 #define DEFAULT_VENDOR_URL_BUG "http://bugreport.java.com/bugreport/crash.jsp"
71 #define DEFAULT_JAVA_LAUNCHER "generic"
72
73 char* Arguments::_jvm_flags_file = NULL;
74 char** Arguments::_jvm_flags_array = NULL;
75 int Arguments::_num_jvm_flags = 0;
76 char** Arguments::_jvm_args_array = NULL;
77 int Arguments::_num_jvm_args = 0;
78 char* Arguments::_java_command = NULL;
79 SystemProperty* Arguments::_system_properties = NULL;
80 const char* Arguments::_gc_log_filename = NULL;
81 size_t Arguments::_conservative_max_heap_alignment = 0;
82 size_t Arguments::_min_heap_size = 0;
83 Arguments::Mode Arguments::_mode = _mixed;
84 bool Arguments::_java_compiler = false;
85 bool Arguments::_xdebug_mode = false;
86 const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG;
87 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER;
88 int Arguments::_sun_java_launcher_pid = -1;
89 bool Arguments::_sun_java_launcher_is_altjvm = false;
90
91 // These parameters are reset in method parse_vm_init_args()
92 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
93 bool Arguments::_UseOnStackReplacement = UseOnStackReplacement;
94 bool Arguments::_BackgroundCompilation = BackgroundCompilation;
95 bool Arguments::_ClipInlining = ClipInlining;
96 intx Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
97 intx Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
98
99 char* Arguments::SharedArchivePath = NULL;
100
101 AgentLibraryList Arguments::_libraryList;
102 AgentLibraryList Arguments::_agentList;
103
104 abort_hook_t Arguments::_abort_hook = NULL;
105 exit_hook_t Arguments::_exit_hook = NULL;
106 vfprintf_hook_t Arguments::_vfprintf_hook = NULL;
107
108
109 SystemProperty *Arguments::_sun_boot_library_path = NULL;
110 SystemProperty *Arguments::_java_library_path = NULL;
111 SystemProperty *Arguments::_java_home = NULL;
112 SystemProperty *Arguments::_java_class_path = NULL;
113 SystemProperty *Arguments::_jdk_boot_class_path_append = NULL;
114
115 GrowableArray<ModulePatchPath*> *Arguments::_patch_mod_prefix = NULL;
116 PathString *Arguments::_system_boot_class_path = NULL;
117 bool Arguments::_has_jimage = false;
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 bool needs_module_property_warning = false;
167
168 #define MODULE_PROPERTY_PREFIX "jdk.module."
169 #define MODULE_PROPERTY_PREFIX_LEN 11
170 #define ADDEXPORTS "addexports"
171 #define ADDEXPORTS_LEN 10
172 #define ADDREADS "addreads"
173 #define ADDREADS_LEN 8
174 #define ADDOPENS "addopens"
175 #define ADDOPENS_LEN 8
176 #define PATCH "patch"
177 #define PATCH_LEN 5
178 #define ADDMODS "addmods"
179 #define ADDMODS_LEN 7
180 #define LIMITMODS "limitmods"
181 #define LIMITMODS_LEN 9
182 #define PATH "path"
183 #define PATH_LEN 4
184 #define UPGRADE_PATH "upgrade.path"
185 #define UPGRADE_PATH_LEN 12
186
187 // Return TRUE if option matches 'property', or 'property=', or 'property.'.
188 static bool matches_property_suffix(const char* option, const char* property, size_t len) {
189 return ((strncmp(option, property, len) == 0) &&
190 (option[len] == '=' || option[len] == '.' || option[len] == '\0'));
191 }
192
193 // Return true if property starts with "jdk.module." and its ensuing chars match
194 // any of the reserved module properties.
195 // property should be passed without the leading "-D".
196 bool Arguments::is_internal_module_property(const char* property) {
197 assert((strncmp(property, "-D", 2) != 0), "Unexpected leading -D");
198 if (strncmp(property, MODULE_PROPERTY_PREFIX, MODULE_PROPERTY_PREFIX_LEN) == 0) {
199 const char* property_suffix = property + MODULE_PROPERTY_PREFIX_LEN;
200 if (matches_property_suffix(property_suffix, ADDEXPORTS, ADDEXPORTS_LEN) ||
201 matches_property_suffix(property_suffix, ADDREADS, ADDREADS_LEN) ||
202 matches_property_suffix(property_suffix, ADDOPENS, ADDOPENS_LEN) ||
203 matches_property_suffix(property_suffix, PATCH, PATCH_LEN) ||
204 matches_property_suffix(property_suffix, ADDMODS, ADDMODS_LEN) ||
205 matches_property_suffix(property_suffix, LIMITMODS, LIMITMODS_LEN) ||
206 matches_property_suffix(property_suffix, PATH, PATH_LEN) ||
207 matches_property_suffix(property_suffix, UPGRADE_PATH, UPGRADE_PATH_LEN)) {
208 return true;
209 }
210 }
211 return false;
212 }
213
214 // Process java launcher properties.
215 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) {
216 // See if sun.java.launcher, sun.java.launcher.is_altjvm or
217 // sun.java.launcher.pid is defined.
218 // Must do this before setting up other system properties,
219 // as some of them may depend on launcher type.
220 for (int index = 0; index < args->nOptions; index++) {
221 const JavaVMOption* option = args->options + index;
222 const char* tail;
223
224 if (match_option(option, "-Dsun.java.launcher=", &tail)) {
225 process_java_launcher_argument(tail, option->extraInfo);
226 continue;
227 }
228 if (match_option(option, "-Dsun.java.launcher.is_altjvm=", &tail)) {
229 if (strcmp(tail, "true") == 0) {
230 _sun_java_launcher_is_altjvm = true;
231 }
232 continue;
233 }
234 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) {
235 _sun_java_launcher_pid = atoi(tail);
236 continue;
237 }
238 }
239 }
240
241 // Initialize system properties key and value.
242 void Arguments::init_system_properties() {
243
244 // Set up _system_boot_class_path which is not a property but
245 // relies heavily on argument processing and the jdk.boot.class.path.append
246 // property. It is used to store the underlying system boot class path.
247 _system_boot_class_path = new PathString(NULL);
248
249 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name",
250 "Java Virtual Machine Specification", false));
251 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false));
252 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false));
253 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true));
254 PropertyList_add(&_system_properties, new SystemProperty("jdk.debug", VM_Version::jdk_debug_level(), false));
255
256 // Following are JVMTI agent writable properties.
257 // Properties values are set to NULL and they are
258 // os specific they are initialized in os::init_system_properties_values().
259 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true);
260 _java_library_path = new SystemProperty("java.library.path", NULL, true);
261 _java_home = new SystemProperty("java.home", NULL, true);
262 _java_class_path = new SystemProperty("java.class.path", "", true);
263 // jdk.boot.class.path.append is a non-writeable, internal property.
264 // It can only be set by either:
265 // - -Xbootclasspath/a:
266 // - AddToBootstrapClassLoaderSearch during JVMTI OnLoad phase
267 _jdk_boot_class_path_append = new SystemProperty("jdk.boot.class.path.append", "", false, true);
268
269 // Add to System Property list.
270 PropertyList_add(&_system_properties, _sun_boot_library_path);
271 PropertyList_add(&_system_properties, _java_library_path);
272 PropertyList_add(&_system_properties, _java_home);
273 PropertyList_add(&_system_properties, _java_class_path);
274 PropertyList_add(&_system_properties, _jdk_boot_class_path_append);
275
276 // Set OS specific system properties values
277 os::init_system_properties_values();
278 }
279
280 // Update/Initialize System properties after JDK version number is known
281 void Arguments::init_version_specific_system_properties() {
282 enum { bufsz = 16 };
283 char buffer[bufsz];
284 const char* spec_vendor = "Oracle Corporation";
285 uint32_t spec_version = JDK_Version::current().major_version();
286
287 jio_snprintf(buffer, bufsz, UINT32_FORMAT, spec_version);
288
289 PropertyList_add(&_system_properties,
290 new SystemProperty("java.vm.specification.vendor", spec_vendor, false));
291 PropertyList_add(&_system_properties,
292 new SystemProperty("java.vm.specification.version", buffer, false));
293 PropertyList_add(&_system_properties,
294 new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false));
295 }
296
297 /*
298 * -XX argument processing:
299 *
300 * -XX arguments are defined in several places, such as:
301 * globals.hpp, globals_<cpu>.hpp, globals_<os>.hpp, <compiler>_globals.hpp, or <gc>_globals.hpp.
302 * -XX arguments are parsed in parse_argument().
303 * -XX argument bounds checking is done in check_vm_args_consistency().
304 *
305 * Over time -XX arguments may change. There are mechanisms to handle common cases:
306 *
307 * ALIASED: An option that is simply another name for another option. This is often
308 * part of the process of deprecating a flag, but not all aliases need
309 * to be deprecated.
310 *
311 * Create an alias for an option by adding the old and new option names to the
312 * "aliased_jvm_flags" table. Delete the old variable from globals.hpp (etc).
313 *
314 * DEPRECATED: An option that is supported, but a warning is printed to let the user know that
315 * support may be removed in the future. Both regular and aliased options may be
316 * deprecated.
317 *
318 * Add a deprecation warning for an option (or alias) by adding an entry in the
319 * "special_jvm_flags" table and setting the "deprecated_in" field.
320 * Often an option "deprecated" in one major release will
321 * be made "obsolete" in the next. In this case the entry should also have its
322 * "obsolete_in" field set.
323 *
324 * OBSOLETE: An option that has been removed (and deleted from globals.hpp), but is still accepted
325 * on the command line. A warning is printed to let the user know that option might not
326 * be accepted in the future.
327 *
328 * Add an obsolete warning for an option by adding an entry in the "special_jvm_flags"
329 * table and setting the "obsolete_in" field.
330 *
331 * EXPIRED: A deprecated or obsolete option that has an "accept_until" version less than or equal
332 * to the current JDK version. The system will flatly refuse to admit the existence of
333 * the flag. This allows a flag to die automatically over JDK releases.
334 *
335 * Note that manual cleanup of expired options should be done at major JDK version upgrades:
336 * - Newly expired options should be removed from the special_jvm_flags and aliased_jvm_flags tables.
337 * - Newly obsolete or expired deprecated options should have their global variable
338 * definitions removed (from globals.hpp, etc) and related implementations removed.
339 *
340 * Recommended approach for removing options:
341 *
342 * To remove options commonly used by customers (e.g. product, commercial -XX options), use
343 * the 3-step model adding major release numbers to the deprecate, obsolete and expire columns.
344 *
345 * To remove internal options (e.g. diagnostic, experimental, develop options), use
346 * a 2-step model adding major release numbers to the obsolete and expire columns.
347 *
348 * To change the name of an option, use the alias table as well as a 2-step
349 * model adding major release numbers to the deprecate and expire columns.
350 * Think twice about aliasing commonly used customer options.
351 *
352 * There are times when it is appropriate to leave a future release number as undefined.
353 *
354 * Tests: Aliases should be tested in VMAliasOptions.java.
355 * Deprecated options should be tested in VMDeprecatedOptions.java.
356 */
357
358 // The special_jvm_flags table declares options that are being deprecated and/or obsoleted. The
359 // "deprecated_in" or "obsolete_in" fields may be set to "undefined", but not both.
360 // When the JDK version reaches 'deprecated_in' limit, the JVM will process this flag on
361 // the command-line as usual, but will issue a warning.
362 // When the JDK version reaches 'obsolete_in' limit, the JVM will continue accepting this flag on
363 // the command-line, while issuing a warning and ignoring the flag value.
364 // Once the JDK version reaches 'expired_in' limit, the JVM will flatly refuse to admit the
365 // existence of the flag.
366 //
367 // MANUAL CLEANUP ON JDK VERSION UPDATES:
368 // This table ensures that the handling of options will update automatically when the JDK
369 // version is incremented, but the source code needs to be cleanup up manually:
370 // - As "deprecated" options age into "obsolete" or "expired" options, the associated "globals"
371 // variable should be removed, as well as users of the variable.
372 // - As "deprecated" options age into "obsolete" options, move the entry into the
373 // "Obsolete Flags" section of the table.
374 // - All expired options should be removed from the table.
375 static SpecialFlag const special_jvm_flags[] = {
376 // -------------- Deprecated Flags --------------
377 // --- Non-alias flags - sorted by obsolete_in then expired_in:
378 { "MaxGCMinorPauseMillis", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() },
379 { "UseConcMarkSweepGC", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
380 { "AssumeMP", JDK_Version::jdk(10),JDK_Version::undefined(), JDK_Version::undefined() },
381 { "MonitorInUseLists", JDK_Version::jdk(10),JDK_Version::undefined(), JDK_Version::undefined() },
382 { "MaxRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
383 { "MinRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
384 { "InitialRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
385 { "IgnoreUnverifiableClassesDuringDump", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
386
387 // --- Deprecated alias flags (see also aliased_jvm_flags) - sorted by obsolete_in then expired_in:
388 { "DefaultMaxRAMFraction", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() },
389 { "CreateMinidumpOnCrash", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
390 { "MustCallLoadClassInternal", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
391 { "UnsyncloadClass", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
392
393 // -------------- Obsolete Flags - sorted by expired_in --------------
394 { "ConvertSleepToYield", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) },
395 { "ConvertYieldToSleep", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) },
396 { "MinSleepInterval", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) },
397 { "PermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::undefined() },
398 { "MaxPermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::undefined() },
399
400 #ifdef TEST_VERIFY_SPECIAL_JVM_FLAGS
401 { "dep > obs", JDK_Version::jdk(9), JDK_Version::jdk(8), JDK_Version::undefined() },
402 { "dep > exp ", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(8) },
403 { "obs > exp ", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(8) },
404 { "not deprecated or obsolete", JDK_Version::undefined(), JDK_Version::undefined(), JDK_Version::jdk(9) },
405 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
406 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
407 { "BytecodeVerificationRemote", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::undefined() },
408 #endif
409
410 { NULL, JDK_Version(0), JDK_Version(0) }
411 };
412
413 // Flags that are aliases for other flags.
414 typedef struct {
415 const char* alias_name;
416 const char* real_name;
417 } AliasedFlag;
418
419 static AliasedFlag const aliased_jvm_flags[] = {
420 { "DefaultMaxRAMFraction", "MaxRAMFraction" },
421 { "CreateMinidumpOnCrash", "CreateCoredumpOnCrash" },
422 { NULL, NULL}
423 };
424
425 // NOTE: A compatibility request will be necessary for each alias to be removed.
426 static AliasedLoggingFlag const aliased_logging_flags[] = {
427 { "PrintCompressedOopsMode", LogLevel::Info, true, LOG_TAGS(gc, heap, coops) },
428 { "PrintSharedSpaces", LogLevel::Info, true, LOG_TAGS(cds) },
429 { "TraceBiasedLocking", LogLevel::Info, true, LOG_TAGS(biasedlocking) },
430 { "TraceClassLoading", LogLevel::Info, true, LOG_TAGS(class, load) },
431 { "TraceClassLoadingPreorder", LogLevel::Debug, true, LOG_TAGS(class, preorder) },
432 { "TraceClassPaths", LogLevel::Info, true, LOG_TAGS(class, path) },
433 { "TraceClassResolution", LogLevel::Debug, true, LOG_TAGS(class, resolve) },
434 { "TraceClassUnloading", LogLevel::Info, true, LOG_TAGS(class, unload) },
435 { "TraceExceptions", LogLevel::Info, true, LOG_TAGS(exceptions) },
436 { "TraceLoaderConstraints", LogLevel::Info, true, LOG_TAGS(class, loader, constraints) },
437 { "TraceMonitorInflation", LogLevel::Debug, true, LOG_TAGS(monitorinflation) },
438 { "TraceSafepointCleanupTime", LogLevel::Info, true, LOG_TAGS(safepoint, cleanup) },
439 { "TraceJVMTIObjectTagging", LogLevel::Debug, true, LOG_TAGS(jvmti, objecttagging) },
440 { "TraceRedefineClasses", LogLevel::Info, false, LOG_TAGS(redefine, class) },
441 { NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG) }
442 };
443
444 #ifndef PRODUCT
445 // These options are removed in jdk9. Remove this code for jdk10.
446 static AliasedFlag const removed_develop_logging_flags[] = {
447 { "TraceClassInitialization", "-Xlog:class+init" },
448 { "TraceClassLoaderData", "-Xlog:class+loader+data" },
449 { "TraceDefaultMethods", "-Xlog:defaultmethods=debug" },
450 { "TraceItables", "-Xlog:itables=debug" },
451 { "TraceMonitorMismatch", "-Xlog:monitormismatch=info" },
452 { "TraceSafepoint", "-Xlog:safepoint=debug" },
453 { "TraceStartupTime", "-Xlog:startuptime" },
454 { "TraceVMOperation", "-Xlog:vmoperation=debug" },
455 { "PrintVtables", "-Xlog:vtables=debug" },
456 { "VerboseVerification", "-Xlog:verification" },
457 { NULL, NULL }
458 };
459 #endif //PRODUCT
460
461 // Return true if "v" is less than "other", where "other" may be "undefined".
462 static bool version_less_than(JDK_Version v, JDK_Version other) {
463 assert(!v.is_undefined(), "must be defined");
464 if (!other.is_undefined() && v.compare(other) >= 0) {
465 return false;
466 } else {
467 return true;
468 }
469 }
470
471 extern bool lookup_special_flag_ext(const char *flag_name, SpecialFlag& flag);
472
473 static bool lookup_special_flag(const char *flag_name, SpecialFlag& flag) {
474 // Allow extensions to have priority
475 if (lookup_special_flag_ext(flag_name, flag)) {
476 return true;
477 }
478
479 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
480 if ((strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
481 flag = special_jvm_flags[i];
482 return true;
483 }
484 }
485 return false;
486 }
487
488 bool Arguments::is_obsolete_flag(const char *flag_name, JDK_Version* version) {
489 assert(version != NULL, "Must provide a version buffer");
490 SpecialFlag flag;
491 if (lookup_special_flag(flag_name, flag)) {
492 if (!flag.obsolete_in.is_undefined()) {
493 if (version_less_than(JDK_Version::current(), flag.expired_in)) {
494 *version = flag.obsolete_in;
495 return true;
496 }
497 }
498 }
499 return false;
500 }
501
502 int Arguments::is_deprecated_flag(const char *flag_name, JDK_Version* version) {
503 assert(version != NULL, "Must provide a version buffer");
504 SpecialFlag flag;
505 if (lookup_special_flag(flag_name, flag)) {
506 if (!flag.deprecated_in.is_undefined()) {
507 if (version_less_than(JDK_Version::current(), flag.obsolete_in) &&
508 version_less_than(JDK_Version::current(), flag.expired_in)) {
509 *version = flag.deprecated_in;
510 return 1;
511 } else {
512 return -1;
513 }
514 }
515 }
516 return 0;
517 }
518
519 #ifndef PRODUCT
520 const char* Arguments::removed_develop_logging_flag_name(const char* name){
521 for (size_t i = 0; removed_develop_logging_flags[i].alias_name != NULL; i++) {
522 const AliasedFlag& flag = removed_develop_logging_flags[i];
523 if (strcmp(flag.alias_name, name) == 0) {
524 return flag.real_name;
525 }
526 }
527 return NULL;
528 }
529 #endif // PRODUCT
530
531 const char* Arguments::real_flag_name(const char *flag_name) {
532 for (size_t i = 0; aliased_jvm_flags[i].alias_name != NULL; i++) {
533 const AliasedFlag& flag_status = aliased_jvm_flags[i];
534 if (strcmp(flag_status.alias_name, flag_name) == 0) {
535 return flag_status.real_name;
536 }
537 }
538 return flag_name;
539 }
540
541 #ifdef ASSERT
542 static bool lookup_special_flag(const char *flag_name, size_t skip_index) {
543 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
544 if ((i != skip_index) && (strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
545 return true;
546 }
547 }
548 return false;
549 }
550
551 static bool verify_special_jvm_flags() {
552 bool success = true;
553 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
554 const SpecialFlag& flag = special_jvm_flags[i];
555 if (lookup_special_flag(flag.name, i)) {
556 warning("Duplicate special flag declaration \"%s\"", flag.name);
557 success = false;
558 }
559 if (flag.deprecated_in.is_undefined() &&
560 flag.obsolete_in.is_undefined()) {
561 warning("Special flag entry \"%s\" must declare version deprecated and/or obsoleted in.", flag.name);
562 success = false;
563 }
564
565 if (!flag.deprecated_in.is_undefined()) {
566 if (!version_less_than(flag.deprecated_in, flag.obsolete_in)) {
567 warning("Special flag entry \"%s\" must be deprecated before obsoleted.", flag.name);
568 success = false;
569 }
570
571 if (!version_less_than(flag.deprecated_in, flag.expired_in)) {
572 warning("Special flag entry \"%s\" must be deprecated before expired.", flag.name);
573 success = false;
574 }
575 }
576
577 if (!flag.obsolete_in.is_undefined()) {
578 if (!version_less_than(flag.obsolete_in, flag.expired_in)) {
579 warning("Special flag entry \"%s\" must be obsoleted before expired.", flag.name);
580 success = false;
581 }
582
583 // if flag has become obsolete it should not have a "globals" flag defined anymore.
584 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) {
585 if (Flag::find_flag(flag.name) != NULL) {
586 warning("Global variable for obsolete special flag entry \"%s\" should be removed", flag.name);
587 success = false;
588 }
589 }
590 }
591
592 if (!flag.expired_in.is_undefined()) {
593 // if flag has become expired it should not have a "globals" flag defined anymore.
594 if (!version_less_than(JDK_Version::current(), flag.expired_in)) {
595 if (Flag::find_flag(flag.name) != NULL) {
596 warning("Global variable for expired flag entry \"%s\" should be removed", flag.name);
597 success = false;
598 }
599 }
600 }
601
602 }
603 return success;
604 }
605 #endif
606
607 // Parses a size specification string.
608 bool Arguments::atojulong(const char *s, julong* result) {
609 julong n = 0;
610
611 // First char must be a digit. Don't allow negative numbers or leading spaces.
612 if (!isdigit(*s)) {
613 return false;
614 }
615
616 bool is_hex = (s[0] == '0' && (s[1] == 'x' || s[1] == 'X'));
617 char* remainder;
618 errno = 0;
619 n = strtoull(s, &remainder, (is_hex ? 16 : 10));
620 if (errno != 0) {
621 return false;
622 }
623
624 // Fail if no number was read at all or if the remainder contains more than a single non-digit character.
625 if (remainder == s || strlen(remainder) > 1) {
626 return false;
627 }
628
629 switch (*remainder) {
630 case 'T': case 't':
631 *result = n * G * K;
632 // Check for overflow.
633 if (*result/((julong)G * K) != n) return false;
634 return true;
635 case 'G': case 'g':
636 *result = n * G;
637 if (*result/G != n) return false;
638 return true;
639 case 'M': case 'm':
640 *result = n * M;
641 if (*result/M != n) return false;
642 return true;
643 case 'K': case 'k':
644 *result = n * K;
645 if (*result/K != n) return false;
646 return true;
647 case '\0':
648 *result = n;
649 return true;
650 default:
651 return false;
652 }
653 }
654
655 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size, julong max_size) {
656 if (size < min_size) return arg_too_small;
657 if (size > max_size) return arg_too_big;
658 return arg_in_range;
659 }
660
661 // Describe an argument out of range error
662 void Arguments::describe_range_error(ArgsRange errcode) {
663 switch(errcode) {
664 case arg_too_big:
665 jio_fprintf(defaultStream::error_stream(),
666 "The specified size exceeds the maximum "
667 "representable size.\n");
668 break;
669 case arg_too_small:
670 case arg_unreadable:
671 case arg_in_range:
672 // do nothing for now
673 break;
674 default:
675 ShouldNotReachHere();
676 }
677 }
678
679 static bool set_bool_flag(const char* name, bool value, Flag::Flags origin) {
680 if (CommandLineFlags::boolAtPut(name, &value, origin) == Flag::SUCCESS) {
681 return true;
682 } else {
683 return false;
684 }
685 }
686
687 static bool set_fp_numeric_flag(const char* name, char* value, Flag::Flags origin) {
688 char* end;
689 errno = 0;
690 double v = strtod(value, &end);
691 if ((errno != 0) || (*end != 0)) {
692 return false;
693 }
694
695 if (CommandLineFlags::doubleAtPut(name, &v, origin) == Flag::SUCCESS) {
696 return true;
697 }
698 return false;
699 }
700
701 static bool set_numeric_flag(const char* name, char* value, Flag::Flags origin) {
702 julong v;
703 int int_v;
704 intx intx_v;
705 bool is_neg = false;
706 Flag* result = Flag::find_flag(name, strlen(name));
707
708 if (result == NULL) {
709 return false;
710 }
711
712 // Check the sign first since atojulong() parses only unsigned values.
713 if (*value == '-') {
714 if (!result->is_intx() && !result->is_int()) {
715 return false;
716 }
717 value++;
718 is_neg = true;
719 }
720 if (!Arguments::atojulong(value, &v)) {
721 return false;
722 }
723 if (result->is_int()) {
724 int_v = (int) v;
725 if (is_neg) {
726 int_v = -int_v;
727 }
728 return CommandLineFlags::intAtPut(result, &int_v, origin) == Flag::SUCCESS;
729 } else if (result->is_uint()) {
730 uint uint_v = (uint) v;
731 return CommandLineFlags::uintAtPut(result, &uint_v, origin) == Flag::SUCCESS;
732 } else if (result->is_intx()) {
733 intx_v = (intx) v;
734 if (is_neg) {
735 intx_v = -intx_v;
736 }
737 return CommandLineFlags::intxAtPut(result, &intx_v, origin) == Flag::SUCCESS;
738 } else if (result->is_uintx()) {
739 uintx uintx_v = (uintx) v;
740 return CommandLineFlags::uintxAtPut(result, &uintx_v, origin) == Flag::SUCCESS;
741 } else if (result->is_uint64_t()) {
742 uint64_t uint64_t_v = (uint64_t) v;
743 return CommandLineFlags::uint64_tAtPut(result, &uint64_t_v, origin) == Flag::SUCCESS;
744 } else if (result->is_size_t()) {
745 size_t size_t_v = (size_t) v;
746 return CommandLineFlags::size_tAtPut(result, &size_t_v, origin) == Flag::SUCCESS;
747 } else if (result->is_double()) {
748 double double_v = (double) v;
749 return CommandLineFlags::doubleAtPut(result, &double_v, origin) == Flag::SUCCESS;
750 } else {
751 return false;
752 }
753 }
754
755 static bool set_string_flag(const char* name, const char* value, Flag::Flags origin) {
756 if (CommandLineFlags::ccstrAtPut(name, &value, origin) != Flag::SUCCESS) return false;
757 // Contract: CommandLineFlags always returns a pointer that needs freeing.
758 FREE_C_HEAP_ARRAY(char, value);
759 return true;
760 }
761
762 static bool append_to_string_flag(const char* name, const char* new_value, Flag::Flags origin) {
763 const char* old_value = "";
764 if (CommandLineFlags::ccstrAt(name, &old_value) != Flag::SUCCESS) return false;
765 size_t old_len = old_value != NULL ? strlen(old_value) : 0;
766 size_t new_len = strlen(new_value);
767 const char* value;
768 char* free_this_too = NULL;
769 if (old_len == 0) {
770 value = new_value;
771 } else if (new_len == 0) {
772 value = old_value;
773 } else {
774 size_t length = old_len + 1 + new_len + 1;
775 char* buf = NEW_C_HEAP_ARRAY(char, length, mtArguments);
776 // each new setting adds another LINE to the switch:
777 jio_snprintf(buf, length, "%s\n%s", old_value, new_value);
778 value = buf;
779 free_this_too = buf;
780 }
781 (void) CommandLineFlags::ccstrAtPut(name, &value, origin);
782 // CommandLineFlags always returns a pointer that needs freeing.
783 FREE_C_HEAP_ARRAY(char, value);
784 if (free_this_too != NULL) {
785 // CommandLineFlags made its own copy, so I must delete my own temp. buffer.
786 FREE_C_HEAP_ARRAY(char, free_this_too);
787 }
788 return true;
789 }
790
791 const char* Arguments::handle_aliases_and_deprecation(const char* arg, bool warn) {
792 const char* real_name = real_flag_name(arg);
793 JDK_Version since = JDK_Version();
794 switch (is_deprecated_flag(arg, &since)) {
795 case -1:
796 return NULL; // obsolete or expired, don't process normally
797 case 0:
798 return real_name;
799 case 1: {
800 if (warn) {
801 char version[256];
802 since.to_string(version, sizeof(version));
803 if (real_name != arg) {
804 warning("Option %s was deprecated in version %s and will likely be removed in a future release. Use option %s instead.",
805 arg, version, real_name);
806 } else {
807 warning("Option %s was deprecated in version %s and will likely be removed in a future release.",
808 arg, version);
809 }
810 }
811 return real_name;
812 }
813 }
814 ShouldNotReachHere();
815 return NULL;
816 }
817
818 void log_deprecated_flag(const char* name, bool on, AliasedLoggingFlag alf) {
819 LogTagType tagSet[] = {alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5};
820 // Set tagset string buffer at max size of 256, large enough for any alias tagset
821 const int max_tagset_size = 256;
822 int max_tagset_len = max_tagset_size - 1;
823 char tagset_buffer[max_tagset_size];
824 tagset_buffer[0] = '\0';
825
826 // Write tag-set for aliased logging option, in string list form
827 int max_tags = sizeof(tagSet)/sizeof(tagSet[0]);
828 for (int i = 0; i < max_tags && tagSet[i] != LogTag::__NO_TAG; i++) {
829 if (i > 0) {
830 strncat(tagset_buffer, "+", max_tagset_len - strlen(tagset_buffer));
831 }
832 strncat(tagset_buffer, LogTag::name(tagSet[i]), max_tagset_len - strlen(tagset_buffer));
833 }
834 if (!alf.exactMatch) {
835 strncat(tagset_buffer, "*", max_tagset_len - strlen(tagset_buffer));
836 }
837 log_warning(arguments)("-XX:%s%s is deprecated. Will use -Xlog:%s=%s instead.",
838 (on) ? "+" : "-",
839 name,
840 tagset_buffer,
841 (on) ? LogLevel::name(alf.level) : "off");
842 }
843
844 AliasedLoggingFlag Arguments::catch_logging_aliases(const char* name, bool on){
845 for (size_t i = 0; aliased_logging_flags[i].alias_name != NULL; i++) {
846 const AliasedLoggingFlag& alf = aliased_logging_flags[i];
847 if (strcmp(alf.alias_name, name) == 0) {
848 log_deprecated_flag(name, on, alf);
849 return alf;
850 }
851 }
852 AliasedLoggingFlag a = {NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG)};
853 return a;
854 }
855
856 bool Arguments::parse_argument(const char* arg, Flag::Flags origin) {
857
858 // range of acceptable characters spelled out for portability reasons
859 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]"
860 #define BUFLEN 255
861 char name[BUFLEN+1];
862 char dummy;
863 const char* real_name;
864 bool warn_if_deprecated = true;
865
866 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
867 AliasedLoggingFlag alf = catch_logging_aliases(name, false);
868 if (alf.alias_name != NULL){
869 LogConfiguration::configure_stdout(LogLevel::Off, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
870 return true;
871 }
872 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
873 if (real_name == NULL) {
874 return false;
875 }
876 return set_bool_flag(real_name, false, origin);
877 }
878 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
879 AliasedLoggingFlag alf = catch_logging_aliases(name, true);
880 if (alf.alias_name != NULL){
881 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
882 return true;
883 }
884 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
885 if (real_name == NULL) {
886 return false;
887 }
888 return set_bool_flag(real_name, true, origin);
889 }
890
891 char punct;
892 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') {
893 const char* value = strchr(arg, '=') + 1;
894 Flag* flag;
895
896 // this scanf pattern matches both strings (handled here) and numbers (handled later))
897 AliasedLoggingFlag alf = catch_logging_aliases(name, true);
898 if (alf.alias_name != NULL) {
899 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
900 return true;
901 }
902 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
903 if (real_name == NULL) {
904 return false;
905 }
906 flag = Flag::find_flag(real_name);
907 if (flag != NULL && flag->is_ccstr()) {
908 if (flag->ccstr_accumulates()) {
909 return append_to_string_flag(real_name, value, origin);
910 } else {
911 if (value[0] == '\0') {
912 value = NULL;
913 }
914 return set_string_flag(real_name, value, origin);
915 }
916 } else {
917 warn_if_deprecated = false; // if arg is deprecated, we've already done warning...
918 }
919 }
920
921 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') {
922 const char* value = strchr(arg, '=') + 1;
923 // -XX:Foo:=xxx will reset the string flag to the given value.
924 if (value[0] == '\0') {
925 value = NULL;
926 }
927 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
928 if (real_name == NULL) {
929 return false;
930 }
931 return set_string_flag(real_name, value, origin);
932 }
933
934 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.eE+]"
935 #define SIGNED_NUMBER_RANGE "[-0123456789]"
936 #define NUMBER_RANGE "[0123456789eE+-]"
937 char value[BUFLEN + 1];
938 char value2[BUFLEN + 1];
939 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) {
940 // Looks like a floating-point number -- try again with more lenient format string
941 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) {
942 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
943 if (real_name == NULL) {
944 return false;
945 }
946 return set_fp_numeric_flag(real_name, value, origin);
947 }
948 }
949
950 #define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]"
951 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) {
952 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
953 if (real_name == NULL) {
954 return false;
955 }
956 return set_numeric_flag(real_name, value, origin);
957 }
958
959 return false;
960 }
961
962 void Arguments::add_string(char*** bldarray, int* count, const char* arg) {
963 assert(bldarray != NULL, "illegal argument");
964
965 if (arg == NULL) {
966 return;
967 }
968
969 int new_count = *count + 1;
970
971 // expand the array and add arg to the last element
972 if (*bldarray == NULL) {
973 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtArguments);
974 } else {
975 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtArguments);
976 }
977 (*bldarray)[*count] = os::strdup_check_oom(arg);
978 *count = new_count;
979 }
980
981 void Arguments::build_jvm_args(const char* arg) {
982 add_string(&_jvm_args_array, &_num_jvm_args, arg);
983 }
984
985 void Arguments::build_jvm_flags(const char* arg) {
986 add_string(&_jvm_flags_array, &_num_jvm_flags, arg);
987 }
988
989 // utility function to return a string that concatenates all
990 // strings in a given char** array
991 const char* Arguments::build_resource_string(char** args, int count) {
992 if (args == NULL || count == 0) {
993 return NULL;
994 }
995 size_t length = 0;
996 for (int i = 0; i < count; i++) {
997 length += strlen(args[i]) + 1; // add 1 for a space or NULL terminating character
998 }
999 char* s = NEW_RESOURCE_ARRAY(char, length);
1000 char* dst = s;
1001 for (int j = 0; j < count; j++) {
1002 size_t offset = strlen(args[j]) + 1; // add 1 for a space or NULL terminating character
1003 jio_snprintf(dst, length, "%s ", args[j]); // jio_snprintf will replace the last space character with NULL character
1004 dst += offset;
1005 length -= offset;
1006 }
1007 return (const char*) s;
1008 }
1009
1010 void Arguments::print_on(outputStream* st) {
1011 st->print_cr("VM Arguments:");
1012 if (num_jvm_flags() > 0) {
1013 st->print("jvm_flags: "); print_jvm_flags_on(st);
1014 st->cr();
1015 }
1016 if (num_jvm_args() > 0) {
1017 st->print("jvm_args: "); print_jvm_args_on(st);
1018 st->cr();
1019 }
1020 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>");
1021 if (_java_class_path != NULL) {
1022 char* path = _java_class_path->value();
1023 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path );
1024 }
1025 st->print_cr("Launcher Type: %s", _sun_java_launcher);
1026 }
1027
1028 void Arguments::print_summary_on(outputStream* st) {
1029 // Print the command line. Environment variables that are helpful for
1030 // reproducing the problem are written later in the hs_err file.
1031 // flags are from setting file
1032 if (num_jvm_flags() > 0) {
1033 st->print_raw("Settings File: ");
1034 print_jvm_flags_on(st);
1035 st->cr();
1036 }
1037 // args are the command line and environment variable arguments.
1038 st->print_raw("Command Line: ");
1039 if (num_jvm_args() > 0) {
1040 print_jvm_args_on(st);
1041 }
1042 // this is the classfile and any arguments to the java program
1043 if (java_command() != NULL) {
1044 st->print("%s", java_command());
1045 }
1046 st->cr();
1047 }
1048
1049 void Arguments::print_jvm_flags_on(outputStream* st) {
1050 if (_num_jvm_flags > 0) {
1051 for (int i=0; i < _num_jvm_flags; i++) {
1052 st->print("%s ", _jvm_flags_array[i]);
1053 }
1054 }
1055 }
1056
1057 void Arguments::print_jvm_args_on(outputStream* st) {
1058 if (_num_jvm_args > 0) {
1059 for (int i=0; i < _num_jvm_args; i++) {
1060 st->print("%s ", _jvm_args_array[i]);
1061 }
1062 }
1063 }
1064
1065 bool Arguments::process_argument(const char* arg,
1066 jboolean ignore_unrecognized,
1067 Flag::Flags origin) {
1068 JDK_Version since = JDK_Version();
1069
1070 if (parse_argument(arg, origin)) {
1071 return true;
1072 }
1073
1074 // Determine if the flag has '+', '-', or '=' characters.
1075 bool has_plus_minus = (*arg == '+' || *arg == '-');
1076 const char* const argname = has_plus_minus ? arg + 1 : arg;
1077
1078 size_t arg_len;
1079 const char* equal_sign = strchr(argname, '=');
1080 if (equal_sign == NULL) {
1081 arg_len = strlen(argname);
1082 } else {
1083 arg_len = equal_sign - argname;
1084 }
1085
1086 // Only make the obsolete check for valid arguments.
1087 if (arg_len <= BUFLEN) {
1088 // Construct a string which consists only of the argument name without '+', '-', or '='.
1089 char stripped_argname[BUFLEN+1]; // +1 for '\0'
1090 jio_snprintf(stripped_argname, arg_len+1, "%s", argname); // +1 for '\0'
1091 if (is_obsolete_flag(stripped_argname, &since)) {
1092 char version[256];
1093 since.to_string(version, sizeof(version));
1094 warning("Ignoring option %s; support was removed in %s", stripped_argname, version);
1095 return true;
1096 }
1097 #ifndef PRODUCT
1098 else {
1099 const char* replacement;
1100 if ((replacement = removed_develop_logging_flag_name(stripped_argname)) != NULL){
1101 log_warning(arguments)("%s has been removed. Please use %s instead.",
1102 stripped_argname,
1103 replacement);
1104 return false;
1105 }
1106 }
1107 #endif //PRODUCT
1108 }
1109
1110 // For locked flags, report a custom error message if available.
1111 // Otherwise, report the standard unrecognized VM option.
1112 Flag* found_flag = Flag::find_flag((const char*)argname, arg_len, true, true);
1113 if (found_flag != NULL) {
1114 char locked_message_buf[BUFLEN];
1115 Flag::MsgType msg_type = found_flag->get_locked_message(locked_message_buf, BUFLEN);
1116 if (strlen(locked_message_buf) == 0) {
1117 if (found_flag->is_bool() && !has_plus_minus) {
1118 jio_fprintf(defaultStream::error_stream(),
1119 "Missing +/- setting for VM option '%s'\n", argname);
1120 } else if (!found_flag->is_bool() && has_plus_minus) {
1121 jio_fprintf(defaultStream::error_stream(),
1122 "Unexpected +/- setting in VM option '%s'\n", argname);
1123 } else {
1124 jio_fprintf(defaultStream::error_stream(),
1125 "Improperly specified VM option '%s'\n", argname);
1126 }
1127 } else {
1128 #ifdef PRODUCT
1129 bool mismatched = ((msg_type == Flag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD) ||
1130 (msg_type == Flag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD));
1131 if (ignore_unrecognized && mismatched) {
1132 return true;
1133 }
1134 #endif
1135 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf);
1136 }
1137 } else {
1138 if (ignore_unrecognized) {
1139 return true;
1140 }
1141 jio_fprintf(defaultStream::error_stream(),
1142 "Unrecognized VM option '%s'\n", argname);
1143 Flag* fuzzy_matched = Flag::fuzzy_match((const char*)argname, arg_len, true);
1144 if (fuzzy_matched != NULL) {
1145 jio_fprintf(defaultStream::error_stream(),
1146 "Did you mean '%s%s%s'? ",
1147 (fuzzy_matched->is_bool()) ? "(+/-)" : "",
1148 fuzzy_matched->_name,
1149 (fuzzy_matched->is_bool()) ? "" : "=<value>");
1150 }
1151 }
1152
1153 // allow for commandline "commenting out" options like -XX:#+Verbose
1154 return arg[0] == '#';
1155 }
1156
1157 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) {
1158 FILE* stream = fopen(file_name, "rb");
1159 if (stream == NULL) {
1160 if (should_exist) {
1161 jio_fprintf(defaultStream::error_stream(),
1162 "Could not open settings file %s\n", file_name);
1163 return false;
1164 } else {
1165 return true;
1166 }
1167 }
1168
1169 char token[1024];
1170 int pos = 0;
1171
1172 bool in_white_space = true;
1173 bool in_comment = false;
1174 bool in_quote = false;
1175 char quote_c = 0;
1176 bool result = true;
1177
1178 int c = getc(stream);
1179 while(c != EOF && pos < (int)(sizeof(token)-1)) {
1180 if (in_white_space) {
1181 if (in_comment) {
1182 if (c == '\n') in_comment = false;
1183 } else {
1184 if (c == '#') in_comment = true;
1185 else if (!isspace(c)) {
1186 in_white_space = false;
1187 token[pos++] = c;
1188 }
1189 }
1190 } else {
1191 if (c == '\n' || (!in_quote && isspace(c))) {
1192 // token ends at newline, or at unquoted whitespace
1193 // this allows a way to include spaces in string-valued options
1194 token[pos] = '\0';
1195 logOption(token);
1196 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
1197 build_jvm_flags(token);
1198 pos = 0;
1199 in_white_space = true;
1200 in_quote = false;
1201 } else if (!in_quote && (c == '\'' || c == '"')) {
1202 in_quote = true;
1203 quote_c = c;
1204 } else if (in_quote && (c == quote_c)) {
1205 in_quote = false;
1206 } else {
1207 token[pos++] = c;
1208 }
1209 }
1210 c = getc(stream);
1211 }
1212 if (pos > 0) {
1213 token[pos] = '\0';
1214 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
1215 build_jvm_flags(token);
1216 }
1217 fclose(stream);
1218 return result;
1219 }
1220
1221 //=============================================================================================================
1222 // Parsing of properties (-D)
1223
1224 const char* Arguments::get_property(const char* key) {
1225 return PropertyList_get_value(system_properties(), key);
1226 }
1227
1228 bool Arguments::add_property(const char* prop, PropertyWriteable writeable, PropertyInternal internal) {
1229 const char* eq = strchr(prop, '=');
1230 const char* key;
1231 const char* value = "";
1232
1233 if (eq == NULL) {
1234 // property doesn't have a value, thus use passed string
1235 key = prop;
1236 } else {
1237 // property have a value, thus extract it and save to the
1238 // allocated string
1239 size_t key_len = eq - prop;
1240 char* tmp_key = AllocateHeap(key_len + 1, mtArguments);
1241
1242 jio_snprintf(tmp_key, key_len + 1, "%s", prop);
1243 key = tmp_key;
1244
1245 value = &prop[key_len + 1];
1246 }
1247
1248 if (strcmp(key, "java.compiler") == 0) {
1249 process_java_compiler_argument(value);
1250 // Record value in Arguments, but let it get passed to Java.
1251 } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 ||
1252 strcmp(key, "sun.java.launcher.pid") == 0) {
1253 // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are
1254 // private and are processed in process_sun_java_launcher_properties();
1255 // the sun.java.launcher property is passed on to the java application
1256 } else if (strcmp(key, "sun.boot.library.path") == 0) {
1257 // append is true, writable is true, internal is false
1258 PropertyList_unique_add(&_system_properties, key, value, AppendProperty,
1259 WriteableProperty, ExternalProperty);
1260 } else {
1261 if (strcmp(key, "sun.java.command") == 0) {
1262 char *old_java_command = _java_command;
1263 _java_command = os::strdup_check_oom(value, mtArguments);
1264 if (old_java_command != NULL) {
1265 os::free(old_java_command);
1266 }
1267 } else if (strcmp(key, "java.vendor.url.bug") == 0) {
1268 const char* old_java_vendor_url_bug = _java_vendor_url_bug;
1269 // save it in _java_vendor_url_bug, so JVM fatal error handler can access
1270 // its value without going through the property list or making a Java call.
1271 _java_vendor_url_bug = os::strdup_check_oom(value, mtArguments);
1272 if (old_java_vendor_url_bug != DEFAULT_VENDOR_URL_BUG) {
1273 assert(old_java_vendor_url_bug != NULL, "_java_vendor_url_bug is NULL");
1274 os::free((void *)old_java_vendor_url_bug);
1275 }
1276 }
1277
1278 // Create new property and add at the end of the list
1279 PropertyList_unique_add(&_system_properties, key, value, AddProperty, writeable, internal);
1280 }
1281
1282 if (key != prop) {
1283 // SystemProperty copy passed value, thus free previously allocated
1284 // memory
1285 FreeHeap((void *)key);
1286 }
1287
1288 return true;
1289 }
1290
1291 #if INCLUDE_CDS
1292 void Arguments::check_unsupported_dumping_properties() {
1293 assert(DumpSharedSpaces, "this function is only used with -Xshare:dump");
1294 const char* unsupported_properties[] = { "jdk.module.main",
1295 "jdk.module.limitmods",
1296 "jdk.module.path",
1297 "jdk.module.upgrade.path",
1298 "jdk.module.patch.0" };
1299 const char* unsupported_options[] = { "-m", // cannot use at dump time
1300 "--limit-modules", // ignored at dump time
1301 "--module-path", // ignored at dump time
1302 "--upgrade-module-path", // ignored at dump time
1303 "--patch-module" // ignored at dump time
1304 };
1305 assert(ARRAY_SIZE(unsupported_properties) == ARRAY_SIZE(unsupported_options), "must be");
1306 // If a vm option is found in the unsupported_options array with index less than the info_idx,
1307 // vm will exit with an error message. Otherwise, it will print an informational message if
1308 // -Xlog:cds is enabled.
1309 uint info_idx = 1;
1310 SystemProperty* sp = system_properties();
1311 while (sp != NULL) {
1312 for (uint i = 0; i < ARRAY_SIZE(unsupported_properties); i++) {
1313 if (strcmp(sp->key(), unsupported_properties[i]) == 0) {
1314 if (i < info_idx) {
1315 vm_exit_during_initialization(
1316 "Cannot use the following option when dumping the shared archive", unsupported_options[i]);
1317 } else {
1318 log_info(cds)("Info: the %s option is ignored when dumping the shared archive",
1319 unsupported_options[i]);
1320 }
1321 }
1322 }
1323 sp = sp->next();
1324 }
1325
1326 // Check for an exploded module build in use with -Xshare:dump.
1327 if (!has_jimage()) {
1328 vm_exit_during_initialization("Dumping the shared archive is not supported with an exploded module build");
1329 }
1330 }
1331 #endif
1332
1333 //===========================================================================================================
1334 // Setting int/mixed/comp mode flags
1335
1336 void Arguments::set_mode_flags(Mode mode) {
1337 // Set up default values for all flags.
1338 // If you add a flag to any of the branches below,
1339 // add a default value for it here.
1340 set_java_compiler(false);
1341 _mode = mode;
1342
1343 // Ensure Agent_OnLoad has the correct initial values.
1344 // This may not be the final mode; mode may change later in onload phase.
1345 PropertyList_unique_add(&_system_properties, "java.vm.info",
1346 VM_Version::vm_info_string(), AddProperty, UnwriteableProperty, ExternalProperty);
1347
1348 UseInterpreter = true;
1349 UseCompiler = true;
1350 UseLoopCounter = true;
1351
1352 // Default values may be platform/compiler dependent -
1353 // use the saved values
1354 ClipInlining = Arguments::_ClipInlining;
1355 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods;
1356 UseOnStackReplacement = Arguments::_UseOnStackReplacement;
1357 BackgroundCompilation = Arguments::_BackgroundCompilation;
1358 if (TieredCompilation) {
1359 if (FLAG_IS_DEFAULT(Tier3InvokeNotifyFreqLog)) {
1360 Tier3InvokeNotifyFreqLog = Arguments::_Tier3InvokeNotifyFreqLog;
1361 }
1362 if (FLAG_IS_DEFAULT(Tier4InvocationThreshold)) {
1363 Tier4InvocationThreshold = Arguments::_Tier4InvocationThreshold;
1364 }
1365 }
1366
1367 // Change from defaults based on mode
1368 switch (mode) {
1369 default:
1370 ShouldNotReachHere();
1371 break;
1372 case _int:
1373 UseCompiler = false;
1374 UseLoopCounter = false;
1375 AlwaysCompileLoopMethods = false;
1376 UseOnStackReplacement = false;
1377 break;
1378 case _mixed:
1379 // same as default
1380 break;
1381 case _comp:
1382 UseInterpreter = false;
1383 BackgroundCompilation = false;
1384 ClipInlining = false;
1385 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more.
1386 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and
1387 // compile a level 4 (C2) and then continue executing it.
1388 if (TieredCompilation) {
1389 Tier3InvokeNotifyFreqLog = 0;
1390 Tier4InvocationThreshold = 0;
1391 }
1392 break;
1393 }
1394 }
1395
1396 // Conflict: required to use shared spaces (-Xshare:on), but
1397 // incompatible command line options were chosen.
1398 static void no_shared_spaces(const char* message) {
1399 if (RequireSharedSpaces) {
1400 jio_fprintf(defaultStream::error_stream(),
1401 "Class data sharing is inconsistent with other specified options.\n");
1402 vm_exit_during_initialization("Unable to use shared archive.", message);
1403 } else {
1404 FLAG_SET_DEFAULT(UseSharedSpaces, false);
1405 }
1406 }
1407
1408 // Returns threshold scaled with the value of scale.
1409 // If scale < 0.0, threshold is returned without scaling.
1410 intx Arguments::scaled_compile_threshold(intx threshold, double scale) {
1411 if (scale == 1.0 || scale < 0.0) {
1412 return threshold;
1413 } else {
1414 return (intx)(threshold * scale);
1415 }
1416 }
1417
1418 // Returns freq_log scaled with the value of scale.
1419 // Returned values are in the range of [0, InvocationCounter::number_of_count_bits + 1].
1420 // If scale < 0.0, freq_log is returned without scaling.
1421 intx Arguments::scaled_freq_log(intx freq_log, double scale) {
1422 // Check if scaling is necessary or if negative value was specified.
1423 if (scale == 1.0 || scale < 0.0) {
1424 return freq_log;
1425 }
1426 // Check values to avoid calculating log2 of 0.
1427 if (scale == 0.0 || freq_log == 0) {
1428 return 0;
1429 }
1430 // Determine the maximum notification frequency value currently supported.
1431 // The largest mask value that the interpreter/C1 can handle is
1432 // of length InvocationCounter::number_of_count_bits. Mask values are always
1433 // one bit shorter then the value of the notification frequency. Set
1434 // max_freq_bits accordingly.
1435 intx max_freq_bits = InvocationCounter::number_of_count_bits + 1;
1436 intx scaled_freq = scaled_compile_threshold((intx)1 << freq_log, scale);
1437 if (scaled_freq == 0) {
1438 // Return 0 right away to avoid calculating log2 of 0.
1439 return 0;
1440 } else if (scaled_freq > nth_bit(max_freq_bits)) {
1441 return max_freq_bits;
1442 } else {
1443 return log2_intptr(scaled_freq);
1444 }
1445 }
1446
1447 void Arguments::set_tiered_flags() {
1448 // With tiered, set default policy to AdvancedThresholdPolicy, which is 3.
1449 if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) {
1450 FLAG_SET_DEFAULT(CompilationPolicyChoice, 3);
1451 }
1452 if (CompilationPolicyChoice < 2) {
1453 vm_exit_during_initialization(
1454 "Incompatible compilation policy selected", NULL);
1455 }
1456 // Increase the code cache size - tiered compiles a lot more.
1457 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
1458 FLAG_SET_ERGO(uintx, ReservedCodeCacheSize,
1459 MIN2(CODE_CACHE_DEFAULT_LIMIT, ReservedCodeCacheSize * 5));
1460 }
1461 // Enable SegmentedCodeCache if TieredCompilation is enabled and ReservedCodeCacheSize >= 240M
1462 if (FLAG_IS_DEFAULT(SegmentedCodeCache) && ReservedCodeCacheSize >= 240*M) {
1463 FLAG_SET_ERGO(bool, SegmentedCodeCache, true);
1464 }
1465 if (!UseInterpreter) { // -Xcomp
1466 Tier3InvokeNotifyFreqLog = 0;
1467 Tier4InvocationThreshold = 0;
1468 }
1469
1470 if (CompileThresholdScaling < 0) {
1471 vm_exit_during_initialization("Negative value specified for CompileThresholdScaling", NULL);
1472 }
1473
1474 // Scale tiered compilation thresholds.
1475 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves compilation thresholds unchanged.
1476 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
1477 FLAG_SET_ERGO(intx, Tier0InvokeNotifyFreqLog, scaled_freq_log(Tier0InvokeNotifyFreqLog));
1478 FLAG_SET_ERGO(intx, Tier0BackedgeNotifyFreqLog, scaled_freq_log(Tier0BackedgeNotifyFreqLog));
1479
1480 FLAG_SET_ERGO(intx, Tier3InvocationThreshold, scaled_compile_threshold(Tier3InvocationThreshold));
1481 FLAG_SET_ERGO(intx, Tier3MinInvocationThreshold, scaled_compile_threshold(Tier3MinInvocationThreshold));
1482 FLAG_SET_ERGO(intx, Tier3CompileThreshold, scaled_compile_threshold(Tier3CompileThreshold));
1483 FLAG_SET_ERGO(intx, Tier3BackEdgeThreshold, scaled_compile_threshold(Tier3BackEdgeThreshold));
1484
1485 // Tier2{Invocation,MinInvocation,Compile,Backedge}Threshold should be scaled here
1486 // once these thresholds become supported.
1487
1488 FLAG_SET_ERGO(intx, Tier2InvokeNotifyFreqLog, scaled_freq_log(Tier2InvokeNotifyFreqLog));
1489 FLAG_SET_ERGO(intx, Tier2BackedgeNotifyFreqLog, scaled_freq_log(Tier2BackedgeNotifyFreqLog));
1490
1491 FLAG_SET_ERGO(intx, Tier3InvokeNotifyFreqLog, scaled_freq_log(Tier3InvokeNotifyFreqLog));
1492 FLAG_SET_ERGO(intx, Tier3BackedgeNotifyFreqLog, scaled_freq_log(Tier3BackedgeNotifyFreqLog));
1493
1494 FLAG_SET_ERGO(intx, Tier23InlineeNotifyFreqLog, scaled_freq_log(Tier23InlineeNotifyFreqLog));
1495
1496 FLAG_SET_ERGO(intx, Tier4InvocationThreshold, scaled_compile_threshold(Tier4InvocationThreshold));
1497 FLAG_SET_ERGO(intx, Tier4MinInvocationThreshold, scaled_compile_threshold(Tier4MinInvocationThreshold));
1498 FLAG_SET_ERGO(intx, Tier4CompileThreshold, scaled_compile_threshold(Tier4CompileThreshold));
1499 FLAG_SET_ERGO(intx, Tier4BackEdgeThreshold, scaled_compile_threshold(Tier4BackEdgeThreshold));
1500 }
1501 }
1502
1503 #if INCLUDE_ALL_GCS
1504 static void disable_adaptive_size_policy(const char* collector_name) {
1505 if (UseAdaptiveSizePolicy) {
1506 if (FLAG_IS_CMDLINE(UseAdaptiveSizePolicy)) {
1507 warning("Disabling UseAdaptiveSizePolicy; it is incompatible with %s.",
1508 collector_name);
1509 }
1510 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false);
1511 }
1512 }
1513
1514 void Arguments::set_parnew_gc_flags() {
1515 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC && !UseG1GC,
1516 "control point invariant");
1517 assert(UseConcMarkSweepGC, "CMS is expected to be on here");
1518
1519 if (FLAG_IS_DEFAULT(ParallelGCThreads)) {
1520 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads());
1521 assert(ParallelGCThreads > 0, "We should always have at least one thread by default");
1522 } else if (ParallelGCThreads == 0) {
1523 jio_fprintf(defaultStream::error_stream(),
1524 "The ParNew GC can not be combined with -XX:ParallelGCThreads=0\n");
1525 vm_exit(1);
1526 }
1527
1528 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 respectively,
1529 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration
1530 // we set them to 1024 and 1024.
1531 // See CR 6362902.
1532 if (FLAG_IS_DEFAULT(YoungPLABSize)) {
1533 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024);
1534 }
1535 if (FLAG_IS_DEFAULT(OldPLABSize)) {
1536 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024);
1537 }
1538
1539 // When using compressed oops, we use local overflow stacks,
1540 // rather than using a global overflow list chained through
1541 // the klass word of the object's pre-image.
1542 if (UseCompressedOops && !ParGCUseLocalOverflow) {
1543 if (!FLAG_IS_DEFAULT(ParGCUseLocalOverflow)) {
1544 warning("Forcing +ParGCUseLocalOverflow: needed if using compressed references");
1545 }
1546 FLAG_SET_DEFAULT(ParGCUseLocalOverflow, true);
1547 }
1548 assert(ParGCUseLocalOverflow || !UseCompressedOops, "Error");
1549 }
1550
1551 // Adjust some sizes to suit CMS and/or ParNew needs; these work well on
1552 // sparc/solaris for certain applications, but would gain from
1553 // further optimization and tuning efforts, and would almost
1554 // certainly gain from analysis of platform and environment.
1555 void Arguments::set_cms_and_parnew_gc_flags() {
1556 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC, "Error");
1557 assert(UseConcMarkSweepGC, "CMS is expected to be on here");
1558
1559 // Turn off AdaptiveSizePolicy by default for cms until it is complete.
1560 disable_adaptive_size_policy("UseConcMarkSweepGC");
1561
1562 set_parnew_gc_flags();
1563
1564 size_t max_heap = align_down(MaxHeapSize,
1565 CardTableRS::ct_max_alignment_constraint());
1566
1567 // Now make adjustments for CMS
1568 intx tenuring_default = (intx)6;
1569 size_t young_gen_per_worker = CMSYoungGenPerWorker;
1570
1571 // Preferred young gen size for "short" pauses:
1572 // upper bound depends on # of threads and NewRatio.
1573 const size_t preferred_max_new_size_unaligned =
1574 MIN2(max_heap/(NewRatio+1), ScaleForWordSize(young_gen_per_worker * ParallelGCThreads));
1575 size_t preferred_max_new_size =
1576 align_up(preferred_max_new_size_unaligned, os::vm_page_size());
1577
1578 // Unless explicitly requested otherwise, size young gen
1579 // for "short" pauses ~ CMSYoungGenPerWorker*ParallelGCThreads
1580
1581 // If either MaxNewSize or NewRatio is set on the command line,
1582 // assume the user is trying to set the size of the young gen.
1583 if (FLAG_IS_DEFAULT(MaxNewSize) && FLAG_IS_DEFAULT(NewRatio)) {
1584
1585 // Set MaxNewSize to our calculated preferred_max_new_size unless
1586 // NewSize was set on the command line and it is larger than
1587 // preferred_max_new_size.
1588 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line
1589 FLAG_SET_ERGO(size_t, MaxNewSize, MAX2(NewSize, preferred_max_new_size));
1590 } else {
1591 FLAG_SET_ERGO(size_t, MaxNewSize, preferred_max_new_size);
1592 }
1593 log_trace(gc, heap)("CMS ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize);
1594
1595 // Code along this path potentially sets NewSize and OldSize
1596 log_trace(gc, heap)("CMS set min_heap_size: " SIZE_FORMAT " initial_heap_size: " SIZE_FORMAT " max_heap: " SIZE_FORMAT,
1597 min_heap_size(), InitialHeapSize, max_heap);
1598 size_t min_new = preferred_max_new_size;
1599 if (FLAG_IS_CMDLINE(NewSize)) {
1600 min_new = NewSize;
1601 }
1602 if (max_heap > min_new && min_heap_size() > min_new) {
1603 // Unless explicitly requested otherwise, make young gen
1604 // at least min_new, and at most preferred_max_new_size.
1605 if (FLAG_IS_DEFAULT(NewSize)) {
1606 FLAG_SET_ERGO(size_t, NewSize, MAX2(NewSize, min_new));
1607 FLAG_SET_ERGO(size_t, NewSize, MIN2(preferred_max_new_size, NewSize));
1608 log_trace(gc, heap)("CMS ergo set NewSize: " SIZE_FORMAT, NewSize);
1609 }
1610 // Unless explicitly requested otherwise, size old gen
1611 // so it's NewRatio x of NewSize.
1612 if (FLAG_IS_DEFAULT(OldSize)) {
1613 if (max_heap > NewSize) {
1614 FLAG_SET_ERGO(size_t, OldSize, MIN2(NewRatio*NewSize, max_heap - NewSize));
1615 log_trace(gc, heap)("CMS ergo set OldSize: " SIZE_FORMAT, OldSize);
1616 }
1617 }
1618 }
1619 }
1620 // Unless explicitly requested otherwise, definitely
1621 // promote all objects surviving "tenuring_default" scavenges.
1622 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) &&
1623 FLAG_IS_DEFAULT(SurvivorRatio)) {
1624 FLAG_SET_ERGO(uintx, MaxTenuringThreshold, tenuring_default);
1625 }
1626 // If we decided above (or user explicitly requested)
1627 // `promote all' (via MaxTenuringThreshold := 0),
1628 // prefer minuscule survivor spaces so as not to waste
1629 // space for (non-existent) survivors
1630 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) {
1631 FLAG_SET_ERGO(uintx, SurvivorRatio, MAX2((uintx)1024, SurvivorRatio));
1632 }
1633
1634 // OldPLABSize is interpreted in CMS as not the size of the PLAB in words,
1635 // but rather the number of free blocks of a given size that are used when
1636 // replenishing the local per-worker free list caches.
1637 if (FLAG_IS_DEFAULT(OldPLABSize)) {
1638 if (!FLAG_IS_DEFAULT(ResizeOldPLAB) && !ResizeOldPLAB) {
1639 // OldPLAB sizing manually turned off: Use a larger default setting,
1640 // unless it was manually specified. This is because a too-low value
1641 // will slow down scavenges.
1642 FLAG_SET_ERGO(size_t, OldPLABSize, CompactibleFreeListSpaceLAB::_default_static_old_plab_size); // default value before 6631166
1643 } else {
1644 FLAG_SET_DEFAULT(OldPLABSize, CompactibleFreeListSpaceLAB::_default_dynamic_old_plab_size); // old CMSParPromoteBlocksToClaim default
1645 }
1646 }
1647
1648 // If either of the static initialization defaults have changed, note this
1649 // modification.
1650 if (!FLAG_IS_DEFAULT(OldPLABSize) || !FLAG_IS_DEFAULT(OldPLABWeight)) {
1651 CompactibleFreeListSpaceLAB::modify_initialization(OldPLABSize, OldPLABWeight);
1652 }
1653
1654 log_trace(gc)("MarkStackSize: %uk MarkStackSizeMax: %uk", (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K));
1655 }
1656 #endif // INCLUDE_ALL_GCS
1657
1658 void set_object_alignment() {
1659 // Object alignment.
1660 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2");
1661 MinObjAlignmentInBytes = ObjectAlignmentInBytes;
1662 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small");
1663 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize;
1664 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect");
1665 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1;
1666
1667 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes);
1668 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize;
1669
1670 // Oop encoding heap max
1671 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes;
1672
1673 if (SurvivorAlignmentInBytes == 0) {
1674 SurvivorAlignmentInBytes = ObjectAlignmentInBytes;
1675 }
1676
1677 #if INCLUDE_ALL_GCS
1678 // Set CMS global values
1679 CompactibleFreeListSpace::set_cms_values();
1680 #endif // INCLUDE_ALL_GCS
1681 }
1682
1683 size_t Arguments::max_heap_for_compressed_oops() {
1684 // Avoid sign flip.
1685 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size");
1686 // We need to fit both the NULL page and the heap into the memory budget, while
1687 // keeping alignment constraints of the heap. To guarantee the latter, as the
1688 // NULL page is located before the heap, we pad the NULL page to the conservative
1689 // maximum alignment that the GC may ever impose upon the heap.
1690 size_t displacement_due_to_null_page = align_up((size_t)os::vm_page_size(),
1691 _conservative_max_heap_alignment);
1692
1693 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page);
1694 NOT_LP64(ShouldNotReachHere(); return 0);
1695 }
1696
1697 void Arguments::set_use_compressed_oops() {
1698 #ifndef ZERO
1699 #ifdef _LP64
1700 // MaxHeapSize is not set up properly at this point, but
1701 // the only value that can override MaxHeapSize if we are
1702 // to use UseCompressedOops is InitialHeapSize.
1703 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize);
1704
1705 if (max_heap_size <= max_heap_for_compressed_oops()) {
1706 #if !defined(COMPILER1) || defined(TIERED)
1707 if (FLAG_IS_DEFAULT(UseCompressedOops)) {
1708 FLAG_SET_ERGO(bool, UseCompressedOops, true);
1709 }
1710 #endif
1711 } else {
1712 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) {
1713 warning("Max heap size too large for Compressed Oops");
1714 FLAG_SET_DEFAULT(UseCompressedOops, false);
1715 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1716 }
1717 }
1718 #endif // _LP64
1719 #endif // ZERO
1720 }
1721
1722
1723 // NOTE: set_use_compressed_klass_ptrs() must be called after calling
1724 // set_use_compressed_oops().
1725 void Arguments::set_use_compressed_klass_ptrs() {
1726 #ifndef ZERO
1727 #ifdef _LP64
1728 // UseCompressedOops must be on for UseCompressedClassPointers to be on.
1729 if (!UseCompressedOops) {
1730 if (UseCompressedClassPointers) {
1731 warning("UseCompressedClassPointers requires UseCompressedOops");
1732 }
1733 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1734 } else {
1735 // Turn on UseCompressedClassPointers too
1736 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) {
1737 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true);
1738 }
1739 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs.
1740 if (UseCompressedClassPointers) {
1741 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) {
1742 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers");
1743 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1744 }
1745 }
1746 }
1747 #endif // _LP64
1748 #endif // !ZERO
1749 }
1750
1751 void Arguments::set_conservative_max_heap_alignment() {
1752 // The conservative maximum required alignment for the heap is the maximum of
1753 // the alignments imposed by several sources: any requirements from the heap
1754 // itself, the collector policy and the maximum page size we may run the VM
1755 // with.
1756 size_t heap_alignment = GenCollectedHeap::conservative_max_heap_alignment();
1757 #if INCLUDE_ALL_GCS
1758 if (UseParallelGC) {
1759 heap_alignment = ParallelScavengeHeap::conservative_max_heap_alignment();
1760 } else if (UseG1GC) {
1761 heap_alignment = G1CollectedHeap::conservative_max_heap_alignment();
1762 }
1763 #endif // INCLUDE_ALL_GCS
1764 _conservative_max_heap_alignment = MAX4(heap_alignment,
1765 (size_t)os::vm_allocation_granularity(),
1766 os::max_page_size(),
1767 CollectorPolicy::compute_heap_alignment());
1768 }
1769
1770 bool Arguments::gc_selected() {
1771 #if INCLUDE_ALL_GCS
1772 return UseSerialGC || UseParallelGC || UseParallelOldGC || UseConcMarkSweepGC || UseG1GC;
1773 #else
1774 return UseSerialGC;
1775 #endif // INCLUDE_ALL_GCS
1776 }
1777
1778 #ifdef TIERED
1779 bool Arguments::compilation_mode_selected() {
1780 return !FLAG_IS_DEFAULT(TieredCompilation) || !FLAG_IS_DEFAULT(TieredStopAtLevel) ||
1781 !FLAG_IS_DEFAULT(UseAOT) JVMCI_ONLY(|| !FLAG_IS_DEFAULT(EnableJVMCI) || !FLAG_IS_DEFAULT(UseJVMCICompiler));
1782
1783 }
1784
1785 void Arguments::select_compilation_mode_ergonomically() {
1786 #if defined(_WINDOWS) && !defined(_LP64)
1787 if (FLAG_IS_DEFAULT(NeverActAsServerClassMachine)) {
1788 FLAG_SET_ERGO(bool, NeverActAsServerClassMachine, true);
1789 }
1790 #endif
1791 if (NeverActAsServerClassMachine) {
1792 set_client_compilation_mode();
1793 }
1794 }
1795 #endif //TIERED
1796
1797 void Arguments::select_gc_ergonomically() {
1798 #if INCLUDE_ALL_GCS
1799 if (os::is_server_class_machine()) {
1800 FLAG_SET_ERGO_IF_DEFAULT(bool, UseG1GC, true);
1801 } else {
1802 FLAG_SET_ERGO_IF_DEFAULT(bool, UseSerialGC, true);
1803 }
1804 #else
1805 UNSUPPORTED_OPTION(UseG1GC);
1806 UNSUPPORTED_OPTION(UseParallelGC);
1807 UNSUPPORTED_OPTION(UseParallelOldGC);
1808 UNSUPPORTED_OPTION(UseConcMarkSweepGC);
1809 FLAG_SET_ERGO_IF_DEFAULT(bool, UseSerialGC, true);
1810 #endif // INCLUDE_ALL_GCS
1811 }
1812
1813 void Arguments::select_gc() {
1814 if (!gc_selected()) {
1815 select_gc_ergonomically();
1816 if (!gc_selected()) {
1817 vm_exit_during_initialization("Garbage collector not selected (default collector explicitly disabled)", NULL);
1818 }
1819 }
1820 }
1821
1822 #if INCLUDE_JVMCI
1823 void Arguments::set_jvmci_specific_flags() {
1824 if (UseJVMCICompiler) {
1825 if (FLAG_IS_DEFAULT(TypeProfileWidth)) {
1826 FLAG_SET_DEFAULT(TypeProfileWidth, 8);
1827 }
1828 if (FLAG_IS_DEFAULT(OnStackReplacePercentage)) {
1829 FLAG_SET_DEFAULT(OnStackReplacePercentage, 933);
1830 }
1831 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
1832 FLAG_SET_DEFAULT(ReservedCodeCacheSize, 64*M);
1833 }
1834 if (FLAG_IS_DEFAULT(InitialCodeCacheSize)) {
1835 FLAG_SET_DEFAULT(InitialCodeCacheSize, 16*M);
1836 }
1837 if (FLAG_IS_DEFAULT(MetaspaceSize)) {
1838 FLAG_SET_DEFAULT(MetaspaceSize, 12*M);
1839 }
1840 if (FLAG_IS_DEFAULT(NewSizeThreadIncrease)) {
1841 FLAG_SET_DEFAULT(NewSizeThreadIncrease, 4*K);
1842 }
1843 if (TieredStopAtLevel != CompLevel_full_optimization) {
1844 // Currently JVMCI compiler can only work at the full optimization level
1845 warning("forcing TieredStopAtLevel to full optimization because JVMCI is enabled");
1846 TieredStopAtLevel = CompLevel_full_optimization;
1847 }
1848 if (FLAG_IS_DEFAULT(TypeProfileLevel)) {
1849 FLAG_SET_DEFAULT(TypeProfileLevel, 0);
1850 }
1851 }
1852 }
1853 #endif
1854
1855 void Arguments::set_ergonomics_flags() {
1856 #ifdef TIERED
1857 if (!compilation_mode_selected()) {
1858 select_compilation_mode_ergonomically();
1859 }
1860 #endif
1861 select_gc();
1862
1863 #if defined(COMPILER2) || INCLUDE_JVMCI
1864 // Shared spaces work fine with other GCs but causes bytecode rewriting
1865 // to be disabled, which hurts interpreter performance and decreases
1866 // server performance. When -server is specified, keep the default off
1867 // unless it is asked for. Future work: either add bytecode rewriting
1868 // at link time, or rewrite bytecodes in non-shared methods.
1869 if (is_server_compilation_mode_vm() && !DumpSharedSpaces && !RequireSharedSpaces &&
1870 (FLAG_IS_DEFAULT(UseSharedSpaces) || !UseSharedSpaces)) {
1871 no_shared_spaces("COMPILER2 default: -Xshare:auto | off, have to manually setup to on.");
1872 }
1873 #endif
1874
1875 set_conservative_max_heap_alignment();
1876
1877 #ifndef ZERO
1878 #ifdef _LP64
1879 set_use_compressed_oops();
1880
1881 // set_use_compressed_klass_ptrs() must be called after calling
1882 // set_use_compressed_oops().
1883 set_use_compressed_klass_ptrs();
1884
1885 // Also checks that certain machines are slower with compressed oops
1886 // in vm_version initialization code.
1887 #endif // _LP64
1888 #endif // !ZERO
1889
1890 }
1891
1892 void Arguments::set_parallel_gc_flags() {
1893 assert(UseParallelGC || UseParallelOldGC, "Error");
1894 // Enable ParallelOld unless it was explicitly disabled (cmd line or rc file).
1895 if (FLAG_IS_DEFAULT(UseParallelOldGC)) {
1896 FLAG_SET_DEFAULT(UseParallelOldGC, true);
1897 }
1898 FLAG_SET_DEFAULT(UseParallelGC, true);
1899
1900 // If no heap maximum was requested explicitly, use some reasonable fraction
1901 // of the physical memory, up to a maximum of 1GB.
1902 FLAG_SET_DEFAULT(ParallelGCThreads,
1903 Abstract_VM_Version::parallel_worker_threads());
1904 if (ParallelGCThreads == 0) {
1905 jio_fprintf(defaultStream::error_stream(),
1906 "The Parallel GC can not be combined with -XX:ParallelGCThreads=0\n");
1907 vm_exit(1);
1908 }
1909
1910 if (UseAdaptiveSizePolicy) {
1911 // We don't want to limit adaptive heap sizing's freedom to adjust the heap
1912 // unless the user actually sets these flags.
1913 if (FLAG_IS_DEFAULT(MinHeapFreeRatio)) {
1914 FLAG_SET_DEFAULT(MinHeapFreeRatio, 0);
1915 }
1916 if (FLAG_IS_DEFAULT(MaxHeapFreeRatio)) {
1917 FLAG_SET_DEFAULT(MaxHeapFreeRatio, 100);
1918 }
1919 }
1920
1921 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the
1922 // SurvivorRatio has been set, reset their default values to SurvivorRatio +
1923 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger.
1924 // See CR 6362902 for details.
1925 if (!FLAG_IS_DEFAULT(SurvivorRatio)) {
1926 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) {
1927 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2);
1928 }
1929 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) {
1930 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2);
1931 }
1932 }
1933
1934 if (UseParallelOldGC) {
1935 // Par compact uses lower default values since they are treated as
1936 // minimums. These are different defaults because of the different
1937 // interpretation and are not ergonomically set.
1938 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) {
1939 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1);
1940 }
1941 }
1942 }
1943
1944 void Arguments::set_g1_gc_flags() {
1945 assert(UseG1GC, "Error");
1946 #if defined(COMPILER1) || INCLUDE_JVMCI
1947 FastTLABRefill = false;
1948 #endif
1949 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads());
1950 if (ParallelGCThreads == 0) {
1951 assert(!FLAG_IS_DEFAULT(ParallelGCThreads), "The default value for ParallelGCThreads should not be 0.");
1952 vm_exit_during_initialization("The flag -XX:+UseG1GC can not be combined with -XX:ParallelGCThreads=0", NULL);
1953 }
1954
1955 #if INCLUDE_ALL_GCS
1956 if (FLAG_IS_DEFAULT(G1ConcRefinementThreads)) {
1957 FLAG_SET_ERGO(uint, G1ConcRefinementThreads, ParallelGCThreads);
1958 }
1959 #endif
1960
1961 // MarkStackSize will be set (if it hasn't been set by the user)
1962 // when concurrent marking is initialized.
1963 // Its value will be based upon the number of parallel marking threads.
1964 // But we do set the maximum mark stack size here.
1965 if (FLAG_IS_DEFAULT(MarkStackSizeMax)) {
1966 FLAG_SET_DEFAULT(MarkStackSizeMax, 128 * TASKQUEUE_SIZE);
1967 }
1968
1969 if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) {
1970 // In G1, we want the default GC overhead goal to be higher than
1971 // it is for PS, or the heap might be expanded too aggressively.
1972 // We set it here to ~8%.
1973 FLAG_SET_DEFAULT(GCTimeRatio, 12);
1974 }
1975
1976 // Below, we might need to calculate the pause time interval based on
1977 // the pause target. When we do so we are going to give G1 maximum
1978 // flexibility and allow it to do pauses when it needs to. So, we'll
1979 // arrange that the pause interval to be pause time target + 1 to
1980 // ensure that a) the pause time target is maximized with respect to
1981 // the pause interval and b) we maintain the invariant that pause
1982 // time target < pause interval. If the user does not want this
1983 // maximum flexibility, they will have to set the pause interval
1984 // explicitly.
1985
1986 if (FLAG_IS_DEFAULT(MaxGCPauseMillis)) {
1987 // The default pause time target in G1 is 200ms
1988 FLAG_SET_DEFAULT(MaxGCPauseMillis, 200);
1989 }
1990
1991 // Then, if the interval parameter was not set, set it according to
1992 // the pause time target (this will also deal with the case when the
1993 // pause time target is the default value).
1994 if (FLAG_IS_DEFAULT(GCPauseIntervalMillis)) {
1995 FLAG_SET_DEFAULT(GCPauseIntervalMillis, MaxGCPauseMillis + 1);
1996 }
1997
1998 log_trace(gc)("MarkStackSize: %uk MarkStackSizeMax: %uk", (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K));
1999 }
2000
2001 void Arguments::set_gc_specific_flags() {
2002 #if INCLUDE_ALL_GCS
2003 // Set per-collector flags
2004 if (UseParallelGC || UseParallelOldGC) {
2005 set_parallel_gc_flags();
2006 } else if (UseConcMarkSweepGC) {
2007 set_cms_and_parnew_gc_flags();
2008 } else if (UseG1GC) {
2009 set_g1_gc_flags();
2010 }
2011 if (MinHeapFreeRatio == 100) {
2012 // Keeping the heap 100% free is hard ;-) so limit it to 99%.
2013 FLAG_SET_ERGO(uintx, MinHeapFreeRatio, 99);
2014 }
2015
2016 // If class unloading is disabled, also disable concurrent class unloading.
2017 if (!ClassUnloading) {
2018 FLAG_SET_CMDLINE(bool, CMSClassUnloadingEnabled, false);
2019 FLAG_SET_CMDLINE(bool, ClassUnloadingWithConcurrentMark, false);
2020 }
2021 #endif // INCLUDE_ALL_GCS
2022 }
2023
2024 julong Arguments::limit_by_allocatable_memory(julong limit) {
2025 julong max_allocatable;
2026 julong result = limit;
2027 if (os::has_allocatable_memory_limit(&max_allocatable)) {
2028 result = MIN2(result, max_allocatable / MaxVirtMemFraction);
2029 }
2030 return result;
2031 }
2032
2033 // Use static initialization to get the default before parsing
2034 static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress;
2035
2036 void Arguments::set_heap_size() {
2037 julong phys_mem =
2038 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM)
2039 : (julong)MaxRAM;
2040
2041 // Experimental support for CGroup memory limits
2042 if (UseCGroupMemoryLimitForHeap) {
2043 // This is a rough indicator that a CGroup limit may be in force
2044 // for this process
2045 const char* lim_file = "/sys/fs/cgroup/memory/memory.limit_in_bytes";
2046 FILE *fp = fopen(lim_file, "r");
2047 if (fp != NULL) {
2048 julong cgroup_max = 0;
2049 int ret = fscanf(fp, JULONG_FORMAT, &cgroup_max);
2050 if (ret == 1 && cgroup_max > 0) {
2051 // If unlimited, cgroup_max will be a very large, but unspecified
2052 // value, so use initial phys_mem as a limit
2053 log_info(gc, heap)("Setting phys_mem to the min of cgroup limit ("
2054 JULONG_FORMAT "MB) and initial phys_mem ("
2055 JULONG_FORMAT "MB)", cgroup_max/M, phys_mem/M);
2056 phys_mem = MIN2(cgroup_max, phys_mem);
2057 } else {
2058 warning("Unable to read/parse cgroup memory limit from %s: %s",
2059 lim_file, errno != 0 ? strerror(errno) : "unknown error");
2060 }
2061 fclose(fp);
2062 } else {
2063 warning("Unable to open cgroup memory limit file %s (%s)", lim_file, strerror(errno));
2064 }
2065 }
2066
2067 // Convert deprecated flags
2068 if (FLAG_IS_DEFAULT(MaxRAMPercentage) &&
2069 !FLAG_IS_DEFAULT(MaxRAMFraction))
2070 MaxRAMPercentage = 100.0 / MaxRAMFraction;
2071
2072 if (FLAG_IS_DEFAULT(MinRAMPercentage) &&
2073 !FLAG_IS_DEFAULT(MinRAMFraction))
2074 MinRAMPercentage = 100.0 / MinRAMFraction;
2075
2076 if (FLAG_IS_DEFAULT(InitialRAMPercentage) &&
2077 !FLAG_IS_DEFAULT(InitialRAMFraction))
2078 InitialRAMPercentage = 100.0 / InitialRAMFraction;
2079
2080 // If the maximum heap size has not been set with -Xmx,
2081 // then set it as fraction of the size of physical memory,
2082 // respecting the maximum and minimum sizes of the heap.
2083 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
2084 julong reasonable_max = (julong)((phys_mem * MaxRAMPercentage) / 100);
2085 if (phys_mem <= (julong)((MaxHeapSize * MinRAMPercentage) / 100)) {
2086 // Small physical memory, so use a minimum fraction of it for the heap
2087 reasonable_max = (julong)((phys_mem * MinRAMPercentage) / 100);
2088 } else {
2089 // Not-small physical memory, so require a heap at least
2090 // as large as MaxHeapSize
2091 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize);
2092 }
2093
2094 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) {
2095 // Limit the heap size to ErgoHeapSizeLimit
2096 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit);
2097 }
2098 if (UseCompressedOops) {
2099 // Limit the heap size to the maximum possible when using compressed oops
2100 julong max_coop_heap = (julong)max_heap_for_compressed_oops();
2101
2102 // HeapBaseMinAddress can be greater than default but not less than.
2103 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) {
2104 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) {
2105 // matches compressed oops printing flags
2106 log_debug(gc, heap, coops)("HeapBaseMinAddress must be at least " SIZE_FORMAT
2107 " (" SIZE_FORMAT "G) which is greater than value given " SIZE_FORMAT,
2108 DefaultHeapBaseMinAddress,
2109 DefaultHeapBaseMinAddress/G,
2110 HeapBaseMinAddress);
2111 FLAG_SET_ERGO(size_t, HeapBaseMinAddress, DefaultHeapBaseMinAddress);
2112 }
2113 }
2114
2115 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) {
2116 // Heap should be above HeapBaseMinAddress to get zero based compressed oops
2117 // but it should be not less than default MaxHeapSize.
2118 max_coop_heap -= HeapBaseMinAddress;
2119 }
2120 reasonable_max = MIN2(reasonable_max, max_coop_heap);
2121 }
2122 reasonable_max = limit_by_allocatable_memory(reasonable_max);
2123
2124 if (!FLAG_IS_DEFAULT(InitialHeapSize)) {
2125 // An initial heap size was specified on the command line,
2126 // so be sure that the maximum size is consistent. Done
2127 // after call to limit_by_allocatable_memory because that
2128 // method might reduce the allocation size.
2129 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize);
2130 }
2131
2132 log_trace(gc, heap)(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max);
2133 FLAG_SET_ERGO(size_t, MaxHeapSize, (size_t)reasonable_max);
2134 }
2135
2136 // If the minimum or initial heap_size have not been set or requested to be set
2137 // ergonomically, set them accordingly.
2138 if (InitialHeapSize == 0 || min_heap_size() == 0) {
2139 julong reasonable_minimum = (julong)(OldSize + NewSize);
2140
2141 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize);
2142
2143 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum);
2144
2145 if (InitialHeapSize == 0) {
2146 julong reasonable_initial = (julong)((phys_mem * InitialRAMPercentage) / 100);
2147
2148 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size());
2149 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize);
2150
2151 reasonable_initial = limit_by_allocatable_memory(reasonable_initial);
2152
2153 log_trace(gc, heap)(" Initial heap size " SIZE_FORMAT, (size_t)reasonable_initial);
2154 FLAG_SET_ERGO(size_t, InitialHeapSize, (size_t)reasonable_initial);
2155 }
2156 // If the minimum heap size has not been set (via -Xms),
2157 // synchronize with InitialHeapSize to avoid errors with the default value.
2158 if (min_heap_size() == 0) {
2159 set_min_heap_size(MIN2((size_t)reasonable_minimum, InitialHeapSize));
2160 log_trace(gc, heap)(" Minimum heap size " SIZE_FORMAT, min_heap_size());
2161 }
2162 }
2163 }
2164
2165 // This option inspects the machine and attempts to set various
2166 // parameters to be optimal for long-running, memory allocation
2167 // intensive jobs. It is intended for machines with large
2168 // amounts of cpu and memory.
2169 jint Arguments::set_aggressive_heap_flags() {
2170 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit
2171 // VM, but we may not be able to represent the total physical memory
2172 // available (like having 8gb of memory on a box but using a 32bit VM).
2173 // Thus, we need to make sure we're using a julong for intermediate
2174 // calculations.
2175 julong initHeapSize;
2176 julong total_memory = os::physical_memory();
2177
2178 if (total_memory < (julong) 256 * M) {
2179 jio_fprintf(defaultStream::error_stream(),
2180 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n");
2181 vm_exit(1);
2182 }
2183
2184 // The heap size is half of available memory, or (at most)
2185 // all of possible memory less 160mb (leaving room for the OS
2186 // when using ISM). This is the maximum; because adaptive sizing
2187 // is turned on below, the actual space used may be smaller.
2188
2189 initHeapSize = MIN2(total_memory / (julong) 2,
2190 total_memory - (julong) 160 * M);
2191
2192 initHeapSize = limit_by_allocatable_memory(initHeapSize);
2193
2194 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
2195 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, initHeapSize) != Flag::SUCCESS) {
2196 return JNI_EINVAL;
2197 }
2198 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, initHeapSize) != Flag::SUCCESS) {
2199 return JNI_EINVAL;
2200 }
2201 // Currently the minimum size and the initial heap sizes are the same.
2202 set_min_heap_size(initHeapSize);
2203 }
2204 if (FLAG_IS_DEFAULT(NewSize)) {
2205 // Make the young generation 3/8ths of the total heap.
2206 if (FLAG_SET_CMDLINE(size_t, NewSize,
2207 ((julong) MaxHeapSize / (julong) 8) * (julong) 3) != Flag::SUCCESS) {
2208 return JNI_EINVAL;
2209 }
2210 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, NewSize) != Flag::SUCCESS) {
2211 return JNI_EINVAL;
2212 }
2213 }
2214
2215 #if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
2216 FLAG_SET_DEFAULT(UseLargePages, true);
2217 #endif
2218
2219 // Increase some data structure sizes for efficiency
2220 if (FLAG_SET_CMDLINE(size_t, BaseFootPrintEstimate, MaxHeapSize) != Flag::SUCCESS) {
2221 return JNI_EINVAL;
2222 }
2223 if (FLAG_SET_CMDLINE(bool, ResizeTLAB, false) != Flag::SUCCESS) {
2224 return JNI_EINVAL;
2225 }
2226 if (FLAG_SET_CMDLINE(size_t, TLABSize, 256 * K) != Flag::SUCCESS) {
2227 return JNI_EINVAL;
2228 }
2229
2230 // See the OldPLABSize comment below, but replace 'after promotion'
2231 // with 'after copying'. YoungPLABSize is the size of the survivor
2232 // space per-gc-thread buffers. The default is 4kw.
2233 if (FLAG_SET_CMDLINE(size_t, YoungPLABSize, 256 * K) != Flag::SUCCESS) { // Note: this is in words
2234 return JNI_EINVAL;
2235 }
2236
2237 // OldPLABSize is the size of the buffers in the old gen that
2238 // UseParallelGC uses to promote live data that doesn't fit in the
2239 // survivor spaces. At any given time, there's one for each gc thread.
2240 // The default size is 1kw. These buffers are rarely used, since the
2241 // survivor spaces are usually big enough. For specjbb, however, there
2242 // are occasions when there's lots of live data in the young gen
2243 // and we end up promoting some of it. We don't have a definite
2244 // explanation for why bumping OldPLABSize helps, but the theory
2245 // is that a bigger PLAB results in retaining something like the
2246 // original allocation order after promotion, which improves mutator
2247 // locality. A minor effect may be that larger PLABs reduce the
2248 // number of PLAB allocation events during gc. The value of 8kw
2249 // was arrived at by experimenting with specjbb.
2250 if (FLAG_SET_CMDLINE(size_t, OldPLABSize, 8 * K) != Flag::SUCCESS) { // Note: this is in words
2251 return JNI_EINVAL;
2252 }
2253
2254 // Enable parallel GC and adaptive generation sizing
2255 if (FLAG_SET_CMDLINE(bool, UseParallelGC, true) != Flag::SUCCESS) {
2256 return JNI_EINVAL;
2257 }
2258
2259 // Encourage steady state memory management
2260 if (FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100) != Flag::SUCCESS) {
2261 return JNI_EINVAL;
2262 }
2263
2264 // This appears to improve mutator locality
2265 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
2266 return JNI_EINVAL;
2267 }
2268
2269 // Get around early Solaris scheduling bug
2270 // (affinity vs other jobs on system)
2271 // but disallow DR and offlining (5008695).
2272 if (FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true) != Flag::SUCCESS) {
2273 return JNI_EINVAL;
2274 }
2275
2276 return JNI_OK;
2277 }
2278
2279 // This must be called after ergonomics.
2280 void Arguments::set_bytecode_flags() {
2281 if (!RewriteBytecodes) {
2282 FLAG_SET_DEFAULT(RewriteFrequentPairs, false);
2283 }
2284 }
2285
2286 // Aggressive optimization flags -XX:+AggressiveOpts
2287 jint Arguments::set_aggressive_opts_flags() {
2288 #ifdef COMPILER2
2289 if (AggressiveUnboxing) {
2290 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
2291 FLAG_SET_DEFAULT(EliminateAutoBox, true);
2292 } else if (!EliminateAutoBox) {
2293 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled");
2294 AggressiveUnboxing = false;
2295 }
2296 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) {
2297 FLAG_SET_DEFAULT(DoEscapeAnalysis, true);
2298 } else if (!DoEscapeAnalysis) {
2299 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled");
2300 AggressiveUnboxing = false;
2301 }
2302 }
2303 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
2304 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
2305 FLAG_SET_DEFAULT(EliminateAutoBox, true);
2306 }
2307 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
2308 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000);
2309 }
2310
2311 // Feed the cache size setting into the JDK
2312 char buffer[1024];
2313 jio_snprintf(buffer, 1024, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax);
2314 if (!add_property(buffer)) {
2315 return JNI_ENOMEM;
2316 }
2317 }
2318 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) {
2319 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500);
2320 }
2321 #endif
2322
2323 if (AggressiveOpts) {
2324 // Sample flag setting code
2325 // if (FLAG_IS_DEFAULT(EliminateZeroing)) {
2326 // FLAG_SET_DEFAULT(EliminateZeroing, true);
2327 // }
2328 }
2329
2330 return JNI_OK;
2331 }
2332
2333 //===========================================================================================================
2334 // Parsing of java.compiler property
2335
2336 void Arguments::process_java_compiler_argument(const char* arg) {
2337 // For backwards compatibility, Djava.compiler=NONE or ""
2338 // causes us to switch to -Xint mode UNLESS -Xdebug
2339 // is also specified.
2340 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) {
2341 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen.
2342 }
2343 }
2344
2345 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) {
2346 _sun_java_launcher = os::strdup_check_oom(launcher);
2347 }
2348
2349 bool Arguments::created_by_java_launcher() {
2350 assert(_sun_java_launcher != NULL, "property must have value");
2351 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0;
2352 }
2353
2354 bool Arguments::sun_java_launcher_is_altjvm() {
2355 return _sun_java_launcher_is_altjvm;
2356 }
2357
2358 //===========================================================================================================
2359 // Parsing of main arguments
2360
2361 #if INCLUDE_JVMCI
2362 // Check consistency of jvmci vm argument settings.
2363 bool Arguments::check_jvmci_args_consistency() {
2364 return JVMCIGlobals::check_jvmci_flags_are_consistent();
2365 }
2366 #endif //INCLUDE_JVMCI
2367
2368 // Check consistency of GC selection
2369 bool Arguments::check_gc_consistency() {
2370 // Ensure that the user has not selected conflicting sets
2371 // of collectors.
2372 uint i = 0;
2373 if (UseSerialGC) i++;
2374 if (UseConcMarkSweepGC) i++;
2375 if (UseParallelGC || UseParallelOldGC) i++;
2376 if (UseG1GC) i++;
2377 if (i > 1) {
2378 jio_fprintf(defaultStream::error_stream(),
2379 "Conflicting collector combinations in option list; "
2380 "please refer to the release notes for the combinations "
2381 "allowed\n");
2382 return false;
2383 }
2384
2385 return true;
2386 }
2387
2388 // Check the consistency of vm_init_args
2389 bool Arguments::check_vm_args_consistency() {
2390 // Method for adding checks for flag consistency.
2391 // The intent is to warn the user of all possible conflicts,
2392 // before returning an error.
2393 // Note: Needs platform-dependent factoring.
2394 bool status = true;
2395
2396 if (TLABRefillWasteFraction == 0) {
2397 jio_fprintf(defaultStream::error_stream(),
2398 "TLABRefillWasteFraction should be a denominator, "
2399 "not " SIZE_FORMAT "\n",
2400 TLABRefillWasteFraction);
2401 status = false;
2402 }
2403
2404 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) {
2405 MarkSweepAlwaysCompactCount = 1; // Move objects every gc.
2406 }
2407
2408 if (!(UseParallelGC || UseParallelOldGC) && FLAG_IS_DEFAULT(ScavengeBeforeFullGC)) {
2409 FLAG_SET_DEFAULT(ScavengeBeforeFullGC, false);
2410 }
2411
2412 if (GCTimeLimit == 100) {
2413 // Turn off gc-overhead-limit-exceeded checks
2414 FLAG_SET_DEFAULT(UseGCOverheadLimit, false);
2415 }
2416
2417 status = status && check_gc_consistency();
2418
2419 // CMS space iteration, which FLSVerifyAllHeapreferences entails,
2420 // insists that we hold the requisite locks so that the iteration is
2421 // MT-safe. For the verification at start-up and shut-down, we don't
2422 // yet have a good way of acquiring and releasing these locks,
2423 // which are not visible at the CollectedHeap level. We want to
2424 // be able to acquire these locks and then do the iteration rather
2425 // than just disable the lock verification. This will be fixed under
2426 // bug 4788986.
2427 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) {
2428 if (VerifyDuringStartup) {
2429 warning("Heap verification at start-up disabled "
2430 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
2431 VerifyDuringStartup = false; // Disable verification at start-up
2432 }
2433
2434 if (VerifyBeforeExit) {
2435 warning("Heap verification at shutdown disabled "
2436 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
2437 VerifyBeforeExit = false; // Disable verification at shutdown
2438 }
2439 }
2440
2441 if (PrintNMTStatistics) {
2442 #if INCLUDE_NMT
2443 if (MemTracker::tracking_level() == NMT_off) {
2444 #endif // INCLUDE_NMT
2445 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled");
2446 PrintNMTStatistics = false;
2447 #if INCLUDE_NMT
2448 }
2449 #endif
2450 }
2451
2452 #if INCLUDE_JVMCI
2453 status = status && check_jvmci_args_consistency();
2454
2455 if (EnableJVMCI) {
2456 PropertyList_unique_add(&_system_properties, "jdk.internal.vm.ci.enabled", "true",
2457 AddProperty, UnwriteableProperty, InternalProperty);
2458
2459 if (!ScavengeRootsInCode) {
2460 warning("forcing ScavengeRootsInCode non-zero because JVMCI is enabled");
2461 ScavengeRootsInCode = 1;
2462 }
2463 }
2464 #endif
2465
2466 // Check lower bounds of the code cache
2467 // Template Interpreter code is approximately 3X larger in debug builds.
2468 uint min_code_cache_size = CodeCacheMinimumUseSpace DEBUG_ONLY(* 3);
2469 if (InitialCodeCacheSize < (uintx)os::vm_page_size()) {
2470 jio_fprintf(defaultStream::error_stream(),
2471 "Invalid InitialCodeCacheSize=%dK. Must be at least %dK.\n", InitialCodeCacheSize/K,
2472 os::vm_page_size()/K);
2473 status = false;
2474 } else if (ReservedCodeCacheSize < InitialCodeCacheSize) {
2475 jio_fprintf(defaultStream::error_stream(),
2476 "Invalid ReservedCodeCacheSize: %dK. Must be at least InitialCodeCacheSize=%dK.\n",
2477 ReservedCodeCacheSize/K, InitialCodeCacheSize/K);
2478 status = false;
2479 } else if (ReservedCodeCacheSize < min_code_cache_size) {
2480 jio_fprintf(defaultStream::error_stream(),
2481 "Invalid ReservedCodeCacheSize=%dK. Must be at least %uK.\n", ReservedCodeCacheSize/K,
2482 min_code_cache_size/K);
2483 status = false;
2484 } else if (ReservedCodeCacheSize > CODE_CACHE_SIZE_LIMIT) {
2485 // Code cache size larger than CODE_CACHE_SIZE_LIMIT is not supported.
2486 jio_fprintf(defaultStream::error_stream(),
2487 "Invalid ReservedCodeCacheSize=%dM. Must be at most %uM.\n", ReservedCodeCacheSize/M,
2488 CODE_CACHE_SIZE_LIMIT/M);
2489 status = false;
2490 } else if (NonNMethodCodeHeapSize < min_code_cache_size) {
2491 jio_fprintf(defaultStream::error_stream(),
2492 "Invalid NonNMethodCodeHeapSize=%dK. Must be at least %uK.\n", NonNMethodCodeHeapSize/K,
2493 min_code_cache_size/K);
2494 status = false;
2495 }
2496
2497 #ifdef _LP64
2498 if (!FLAG_IS_DEFAULT(CICompilerCount) && !FLAG_IS_DEFAULT(CICompilerCountPerCPU) && CICompilerCountPerCPU) {
2499 warning("The VM option CICompilerCountPerCPU overrides CICompilerCount.");
2500 }
2501 #endif
2502
2503 #ifndef SUPPORT_RESERVED_STACK_AREA
2504 if (StackReservedPages != 0) {
2505 FLAG_SET_CMDLINE(intx, StackReservedPages, 0);
2506 warning("Reserved Stack Area not supported on this platform");
2507 }
2508 #endif
2509
2510 if (BackgroundCompilation && (CompileTheWorld || ReplayCompiles)) {
2511 if (!FLAG_IS_DEFAULT(BackgroundCompilation)) {
2512 warning("BackgroundCompilation disabled due to CompileTheWorld or ReplayCompiles options.");
2513 }
2514 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false);
2515 }
2516 if (UseCompiler && is_interpreter_only()) {
2517 if (!FLAG_IS_DEFAULT(UseCompiler)) {
2518 warning("UseCompiler disabled due to -Xint.");
2519 }
2520 FLAG_SET_CMDLINE(bool, UseCompiler, false);
2521 }
2522 #ifdef COMPILER2
2523 if (PostLoopMultiversioning && !RangeCheckElimination) {
2524 if (!FLAG_IS_DEFAULT(PostLoopMultiversioning)) {
2525 warning("PostLoopMultiversioning disabled because RangeCheckElimination is disabled.");
2526 }
2527 FLAG_SET_CMDLINE(bool, PostLoopMultiversioning, false);
2528 }
2529 #endif
2530 return status;
2531 }
2532
2533 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore,
2534 const char* option_type) {
2535 if (ignore) return false;
2536
2537 const char* spacer = " ";
2538 if (option_type == NULL) {
2539 option_type = ++spacer; // Set both to the empty string.
2540 }
2541
2542 if (os::obsolete_option(option)) {
2543 jio_fprintf(defaultStream::error_stream(),
2544 "Obsolete %s%soption: %s\n", option_type, spacer,
2545 option->optionString);
2546 return false;
2547 } else {
2548 jio_fprintf(defaultStream::error_stream(),
2549 "Unrecognized %s%soption: %s\n", option_type, spacer,
2550 option->optionString);
2551 return true;
2552 }
2553 }
2554
2555 static const char* user_assertion_options[] = {
2556 "-da", "-ea", "-disableassertions", "-enableassertions", 0
2557 };
2558
2559 static const char* system_assertion_options[] = {
2560 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0
2561 };
2562
2563 bool Arguments::parse_uintx(const char* value,
2564 uintx* uintx_arg,
2565 uintx min_size) {
2566
2567 // Check the sign first since atojulong() parses only unsigned values.
2568 bool value_is_positive = !(*value == '-');
2569
2570 if (value_is_positive) {
2571 julong n;
2572 bool good_return = atojulong(value, &n);
2573 if (good_return) {
2574 bool above_minimum = n >= min_size;
2575 bool value_is_too_large = n > max_uintx;
2576
2577 if (above_minimum && !value_is_too_large) {
2578 *uintx_arg = n;
2579 return true;
2580 }
2581 }
2582 }
2583 return false;
2584 }
2585
2586 unsigned int addreads_count = 0;
2587 unsigned int addexports_count = 0;
2588 unsigned int addopens_count = 0;
2589 unsigned int addmods_count = 0;
2590 unsigned int patch_mod_count = 0;
2591
2592 bool Arguments::create_property(const char* prop_name, const char* prop_value, PropertyInternal internal) {
2593 size_t prop_len = strlen(prop_name) + strlen(prop_value) + 2;
2594 char* property = AllocateHeap(prop_len, mtArguments);
2595 int ret = jio_snprintf(property, prop_len, "%s=%s", prop_name, prop_value);
2596 if (ret < 0 || ret >= (int)prop_len) {
2597 FreeHeap(property);
2598 return false;
2599 }
2600 bool added = add_property(property, UnwriteableProperty, internal);
2601 FreeHeap(property);
2602 return added;
2603 }
2604
2605 bool Arguments::create_numbered_property(const char* prop_base_name, const char* prop_value, unsigned int count) {
2606 const unsigned int props_count_limit = 1000;
2607 const int max_digits = 3;
2608 const int extra_symbols_count = 3; // includes '.', '=', '\0'
2609
2610 // Make sure count is < props_count_limit. Otherwise, memory allocation will be too small.
2611 if (count < props_count_limit) {
2612 size_t prop_len = strlen(prop_base_name) + strlen(prop_value) + max_digits + extra_symbols_count;
2613 char* property = AllocateHeap(prop_len, mtArguments);
2614 int ret = jio_snprintf(property, prop_len, "%s.%d=%s", prop_base_name, count, prop_value);
2615 if (ret < 0 || ret >= (int)prop_len) {
2616 FreeHeap(property);
2617 jio_fprintf(defaultStream::error_stream(), "Failed to create property %s.%d=%s\n", prop_base_name, count, prop_value);
2618 return false;
2619 }
2620 bool added = add_property(property, UnwriteableProperty, InternalProperty);
2621 FreeHeap(property);
2622 return added;
2623 }
2624
2625 jio_fprintf(defaultStream::error_stream(), "Property count limit exceeded: %s, limit=%d\n", prop_base_name, props_count_limit);
2626 return false;
2627 }
2628
2629 Arguments::ArgsRange Arguments::parse_memory_size(const char* s,
2630 julong* long_arg,
2631 julong min_size,
2632 julong max_size) {
2633 if (!atojulong(s, long_arg)) return arg_unreadable;
2634 return check_memory_size(*long_arg, min_size, max_size);
2635 }
2636
2637 // Parse JavaVMInitArgs structure
2638
2639 jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args,
2640 const JavaVMInitArgs *java_options_args,
2641 const JavaVMInitArgs *cmd_line_args) {
2642 bool patch_mod_javabase = false;
2643
2644 // Save default settings for some mode flags
2645 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
2646 Arguments::_UseOnStackReplacement = UseOnStackReplacement;
2647 Arguments::_ClipInlining = ClipInlining;
2648 Arguments::_BackgroundCompilation = BackgroundCompilation;
2649 if (TieredCompilation) {
2650 Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
2651 Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
2652 }
2653
2654 // Setup flags for mixed which is the default
2655 set_mode_flags(_mixed);
2656
2657 // Parse args structure generated from JAVA_TOOL_OPTIONS environment
2658 // variable (if present).
2659 jint result = parse_each_vm_init_arg(java_tool_options_args, &patch_mod_javabase, Flag::ENVIRON_VAR);
2660 if (result != JNI_OK) {
2661 return result;
2662 }
2663
2664 // Parse args structure generated from the command line flags.
2665 result = parse_each_vm_init_arg(cmd_line_args, &patch_mod_javabase, Flag::COMMAND_LINE);
2666 if (result != JNI_OK) {
2667 return result;
2668 }
2669
2670 // Parse args structure generated from the _JAVA_OPTIONS environment
2671 // variable (if present) (mimics classic VM)
2672 result = parse_each_vm_init_arg(java_options_args, &patch_mod_javabase, Flag::ENVIRON_VAR);
2673 if (result != JNI_OK) {
2674 return result;
2675 }
2676
2677 // Do final processing now that all arguments have been parsed
2678 result = finalize_vm_init_args(patch_mod_javabase);
2679 if (result != JNI_OK) {
2680 return result;
2681 }
2682
2683 return JNI_OK;
2684 }
2685
2686 // Checks if name in command-line argument -agent{lib,path}:name[=options]
2687 // represents a valid JDWP agent. is_path==true denotes that we
2688 // are dealing with -agentpath (case where name is a path), otherwise with
2689 // -agentlib
2690 bool valid_jdwp_agent(char *name, bool is_path) {
2691 char *_name;
2692 const char *_jdwp = "jdwp";
2693 size_t _len_jdwp, _len_prefix;
2694
2695 if (is_path) {
2696 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) {
2697 return false;
2698 }
2699
2700 _name++; // skip past last path separator
2701 _len_prefix = strlen(JNI_LIB_PREFIX);
2702
2703 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) {
2704 return false;
2705 }
2706
2707 _name += _len_prefix;
2708 _len_jdwp = strlen(_jdwp);
2709
2710 if (strncmp(_name, _jdwp, _len_jdwp) == 0) {
2711 _name += _len_jdwp;
2712 }
2713 else {
2714 return false;
2715 }
2716
2717 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) {
2718 return false;
2719 }
2720
2721 return true;
2722 }
2723
2724 if (strcmp(name, _jdwp) == 0) {
2725 return true;
2726 }
2727
2728 return false;
2729 }
2730
2731 int Arguments::process_patch_mod_option(const char* patch_mod_tail, bool* patch_mod_javabase) {
2732 // --patch-module=<module>=<file>(<pathsep><file>)*
2733 assert(patch_mod_tail != NULL, "Unexpected NULL patch-module value");
2734 // Find the equal sign between the module name and the path specification
2735 const char* module_equal = strchr(patch_mod_tail, '=');
2736 if (module_equal == NULL) {
2737 jio_fprintf(defaultStream::output_stream(), "Missing '=' in --patch-module specification\n");
2738 return JNI_ERR;
2739 } else {
2740 // Pick out the module name
2741 size_t module_len = module_equal - patch_mod_tail;
2742 char* module_name = NEW_C_HEAP_ARRAY_RETURN_NULL(char, module_len+1, mtArguments);
2743 if (module_name != NULL) {
2744 memcpy(module_name, patch_mod_tail, module_len);
2745 *(module_name + module_len) = '\0';
2746 // The path piece begins one past the module_equal sign
2747 add_patch_mod_prefix(module_name, module_equal + 1, patch_mod_javabase);
2748 FREE_C_HEAP_ARRAY(char, module_name);
2749 if (!create_numbered_property("jdk.module.patch", patch_mod_tail, patch_mod_count++)) {
2750 return JNI_ENOMEM;
2751 }
2752 } else {
2753 return JNI_ENOMEM;
2754 }
2755 }
2756 return JNI_OK;
2757 }
2758
2759 // Parse -Xss memory string parameter and convert to ThreadStackSize in K.
2760 jint Arguments::parse_xss(const JavaVMOption* option, const char* tail, intx* out_ThreadStackSize) {
2761 // The min and max sizes match the values in globals.hpp, but scaled
2762 // with K. The values have been chosen so that alignment with page
2763 // size doesn't change the max value, which makes the conversions
2764 // back and forth between Xss value and ThreadStackSize value easier.
2765 // The values have also been chosen to fit inside a 32-bit signed type.
2766 const julong min_ThreadStackSize = 0;
2767 const julong max_ThreadStackSize = 1 * M;
2768
2769 const julong min_size = min_ThreadStackSize * K;
2770 const julong max_size = max_ThreadStackSize * K;
2771
2772 assert(is_aligned(max_size, os::vm_page_size()), "Implementation assumption");
2773
2774 julong size = 0;
2775 ArgsRange errcode = parse_memory_size(tail, &size, min_size, max_size);
2776 if (errcode != arg_in_range) {
2777 bool silent = (option == NULL); // Allow testing to silence error messages
2778 if (!silent) {
2779 jio_fprintf(defaultStream::error_stream(),
2780 "Invalid thread stack size: %s\n", option->optionString);
2781 describe_range_error(errcode);
2782 }
2783 return JNI_EINVAL;
2784 }
2785
2786 // Internally track ThreadStackSize in units of 1024 bytes.
2787 const julong size_aligned = align_up(size, K);
2788 assert(size <= size_aligned,
2789 "Overflow: " JULONG_FORMAT " " JULONG_FORMAT,
2790 size, size_aligned);
2791
2792 const julong size_in_K = size_aligned / K;
2793 assert(size_in_K < (julong)max_intx,
2794 "size_in_K doesn't fit in the type of ThreadStackSize: " JULONG_FORMAT,
2795 size_in_K);
2796
2797 // Check that code expanding ThreadStackSize to a page aligned number of bytes won't overflow.
2798 const julong max_expanded = align_up(size_in_K * K, os::vm_page_size());
2799 assert(max_expanded < max_uintx && max_expanded >= size_in_K,
2800 "Expansion overflowed: " JULONG_FORMAT " " JULONG_FORMAT,
2801 max_expanded, size_in_K);
2802
2803 *out_ThreadStackSize = (intx)size_in_K;
2804
2805 return JNI_OK;
2806 }
2807
2808 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, bool* patch_mod_javabase, Flag::Flags origin) {
2809 // For match_option to return remaining or value part of option string
2810 const char* tail;
2811
2812 // iterate over arguments
2813 for (int index = 0; index < args->nOptions; index++) {
2814 bool is_absolute_path = false; // for -agentpath vs -agentlib
2815
2816 const JavaVMOption* option = args->options + index;
2817
2818 if (!match_option(option, "-Djava.class.path", &tail) &&
2819 !match_option(option, "-Dsun.java.command", &tail) &&
2820 !match_option(option, "-Dsun.java.launcher", &tail)) {
2821
2822 // add all jvm options to the jvm_args string. This string
2823 // is used later to set the java.vm.args PerfData string constant.
2824 // the -Djava.class.path and the -Dsun.java.command options are
2825 // omitted from jvm_args string as each have their own PerfData
2826 // string constant object.
2827 build_jvm_args(option->optionString);
2828 }
2829
2830 // -verbose:[class/module/gc/jni]
2831 if (match_option(option, "-verbose", &tail)) {
2832 if (!strcmp(tail, ":class") || !strcmp(tail, "")) {
2833 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, load));
2834 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, unload));
2835 } else if (!strcmp(tail, ":module")) {
2836 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, load));
2837 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, unload));
2838 } else if (!strcmp(tail, ":gc")) {
2839 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
2840 } else if (!strcmp(tail, ":jni")) {
2841 if (FLAG_SET_CMDLINE(bool, PrintJNIResolving, true) != Flag::SUCCESS) {
2842 return JNI_EINVAL;
2843 }
2844 }
2845 // -da / -ea / -disableassertions / -enableassertions
2846 // These accept an optional class/package name separated by a colon, e.g.,
2847 // -da:java.lang.Thread.
2848 } else if (match_option(option, user_assertion_options, &tail, true)) {
2849 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2850 if (*tail == '\0') {
2851 JavaAssertions::setUserClassDefault(enable);
2852 } else {
2853 assert(*tail == ':', "bogus match by match_option()");
2854 JavaAssertions::addOption(tail + 1, enable);
2855 }
2856 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions
2857 } else if (match_option(option, system_assertion_options, &tail, false)) {
2858 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2859 JavaAssertions::setSystemClassDefault(enable);
2860 // -bootclasspath:
2861 } else if (match_option(option, "-Xbootclasspath:", &tail)) {
2862 jio_fprintf(defaultStream::output_stream(),
2863 "-Xbootclasspath is no longer a supported option.\n");
2864 return JNI_EINVAL;
2865 // -bootclasspath/a:
2866 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) {
2867 Arguments::append_sysclasspath(tail);
2868 // -bootclasspath/p:
2869 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) {
2870 jio_fprintf(defaultStream::output_stream(),
2871 "-Xbootclasspath/p is no longer a supported option.\n");
2872 return JNI_EINVAL;
2873 // -Xrun
2874 } else if (match_option(option, "-Xrun", &tail)) {
2875 if (tail != NULL) {
2876 const char* pos = strchr(tail, ':');
2877 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2878 char* name = NEW_C_HEAP_ARRAY(char, len + 1, mtArguments);
2879 jio_snprintf(name, len + 1, "%s", tail);
2880
2881 char *options = NULL;
2882 if(pos != NULL) {
2883 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied.
2884 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtArguments), pos+1, len2);
2885 }
2886 #if !INCLUDE_JVMTI
2887 if (strcmp(name, "jdwp") == 0) {
2888 jio_fprintf(defaultStream::error_stream(),
2889 "Debugging agents are not supported in this VM\n");
2890 return JNI_ERR;
2891 }
2892 #endif // !INCLUDE_JVMTI
2893 add_init_library(name, options);
2894 }
2895 } else if (match_option(option, "--add-reads=", &tail)) {
2896 if (!create_numbered_property("jdk.module.addreads", tail, addreads_count++)) {
2897 return JNI_ENOMEM;
2898 }
2899 } else if (match_option(option, "--add-exports=", &tail)) {
2900 if (!create_numbered_property("jdk.module.addexports", tail, addexports_count++)) {
2901 return JNI_ENOMEM;
2902 }
2903 } else if (match_option(option, "--add-opens=", &tail)) {
2904 if (!create_numbered_property("jdk.module.addopens", tail, addopens_count++)) {
2905 return JNI_ENOMEM;
2906 }
2907 } else if (match_option(option, "--add-modules=", &tail)) {
2908 if (!create_numbered_property("jdk.module.addmods", tail, addmods_count++)) {
2909 return JNI_ENOMEM;
2910 }
2911 } else if (match_option(option, "--limit-modules=", &tail)) {
2912 if (!create_property("jdk.module.limitmods", tail, InternalProperty)) {
2913 return JNI_ENOMEM;
2914 }
2915 } else if (match_option(option, "--module-path=", &tail)) {
2916 if (!create_property("jdk.module.path", tail, ExternalProperty)) {
2917 return JNI_ENOMEM;
2918 }
2919 } else if (match_option(option, "--upgrade-module-path=", &tail)) {
2920 if (!create_property("jdk.module.upgrade.path", tail, ExternalProperty)) {
2921 return JNI_ENOMEM;
2922 }
2923 } else if (match_option(option, "--patch-module=", &tail)) {
2924 // --patch-module=<module>=<file>(<pathsep><file>)*
2925 int res = process_patch_mod_option(tail, patch_mod_javabase);
2926 if (res != JNI_OK) {
2927 return res;
2928 }
2929 } else if (match_option(option, "--illegal-access=", &tail)) {
2930 if (!create_property("jdk.module.illegalAccess", tail, ExternalProperty)) {
2931 return JNI_ENOMEM;
2932 }
2933 // -agentlib and -agentpath
2934 } else if (match_option(option, "-agentlib:", &tail) ||
2935 (is_absolute_path = match_option(option, "-agentpath:", &tail))) {
2936 if(tail != NULL) {
2937 const char* pos = strchr(tail, '=');
2938 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2939 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtArguments), tail, len);
2940 name[len] = '\0';
2941
2942 char *options = NULL;
2943 if(pos != NULL) {
2944 options = os::strdup_check_oom(pos + 1, mtArguments);
2945 }
2946 #if !INCLUDE_JVMTI
2947 if (valid_jdwp_agent(name, is_absolute_path)) {
2948 jio_fprintf(defaultStream::error_stream(),
2949 "Debugging agents are not supported in this VM\n");
2950 return JNI_ERR;
2951 }
2952 #endif // !INCLUDE_JVMTI
2953 add_init_agent(name, options, is_absolute_path);
2954 }
2955 // -javaagent
2956 } else if (match_option(option, "-javaagent:", &tail)) {
2957 #if !INCLUDE_JVMTI
2958 jio_fprintf(defaultStream::error_stream(),
2959 "Instrumentation agents are not supported in this VM\n");
2960 return JNI_ERR;
2961 #else
2962 if (tail != NULL) {
2963 size_t length = strlen(tail) + 1;
2964 char *options = NEW_C_HEAP_ARRAY(char, length, mtArguments);
2965 jio_snprintf(options, length, "%s", tail);
2966 add_init_agent("instrument", options, false);
2967 // java agents need module java.instrument
2968 if (!create_numbered_property("jdk.module.addmods", "java.instrument", addmods_count++)) {
2969 return JNI_ENOMEM;
2970 }
2971 }
2972 #endif // !INCLUDE_JVMTI
2973 // -Xnoclassgc
2974 } else if (match_option(option, "-Xnoclassgc")) {
2975 if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != Flag::SUCCESS) {
2976 return JNI_EINVAL;
2977 }
2978 // -Xconcgc
2979 } else if (match_option(option, "-Xconcgc")) {
2980 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true) != Flag::SUCCESS) {
2981 return JNI_EINVAL;
2982 }
2983 handle_extra_cms_flags("-Xconcgc uses UseConcMarkSweepGC");
2984 // -Xnoconcgc
2985 } else if (match_option(option, "-Xnoconcgc")) {
2986 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false) != Flag::SUCCESS) {
2987 return JNI_EINVAL;
2988 }
2989 handle_extra_cms_flags("-Xnoconcgc uses UseConcMarkSweepGC");
2990 // -Xbatch
2991 } else if (match_option(option, "-Xbatch")) {
2992 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
2993 return JNI_EINVAL;
2994 }
2995 // -Xmn for compatibility with other JVM vendors
2996 } else if (match_option(option, "-Xmn", &tail)) {
2997 julong long_initial_young_size = 0;
2998 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1);
2999 if (errcode != arg_in_range) {
3000 jio_fprintf(defaultStream::error_stream(),
3001 "Invalid initial young generation size: %s\n", option->optionString);
3002 describe_range_error(errcode);
3003 return JNI_EINVAL;
3004 }
3005 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
3006 return JNI_EINVAL;
3007 }
3008 if (FLAG_SET_CMDLINE(size_t, NewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
3009 return JNI_EINVAL;
3010 }
3011 // -Xms
3012 } else if (match_option(option, "-Xms", &tail)) {
3013 julong long_initial_heap_size = 0;
3014 // an initial heap size of 0 means automatically determine
3015 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0);
3016 if (errcode != arg_in_range) {
3017 jio_fprintf(defaultStream::error_stream(),
3018 "Invalid initial heap size: %s\n", option->optionString);
3019 describe_range_error(errcode);
3020 return JNI_EINVAL;
3021 }
3022 set_min_heap_size((size_t)long_initial_heap_size);
3023 // Currently the minimum size and the initial heap sizes are the same.
3024 // Can be overridden with -XX:InitialHeapSize.
3025 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, (size_t)long_initial_heap_size) != Flag::SUCCESS) {
3026 return JNI_EINVAL;
3027 }
3028 // -Xmx
3029 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) {
3030 julong long_max_heap_size = 0;
3031 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1);
3032 if (errcode != arg_in_range) {
3033 jio_fprintf(defaultStream::error_stream(),
3034 "Invalid maximum heap size: %s\n", option->optionString);
3035 describe_range_error(errcode);
3036 return JNI_EINVAL;
3037 }
3038 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, (size_t)long_max_heap_size) != Flag::SUCCESS) {
3039 return JNI_EINVAL;
3040 }
3041 // Xmaxf
3042 } else if (match_option(option, "-Xmaxf", &tail)) {
3043 char* err;
3044 int maxf = (int)(strtod(tail, &err) * 100);
3045 if (*err != '\0' || *tail == '\0') {
3046 jio_fprintf(defaultStream::error_stream(),
3047 "Bad max heap free percentage size: %s\n",
3048 option->optionString);
3049 return JNI_EINVAL;
3050 } else {
3051 if (FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf) != Flag::SUCCESS) {
3052 return JNI_EINVAL;
3053 }
3054 }
3055 // Xminf
3056 } else if (match_option(option, "-Xminf", &tail)) {
3057 char* err;
3058 int minf = (int)(strtod(tail, &err) * 100);
3059 if (*err != '\0' || *tail == '\0') {
3060 jio_fprintf(defaultStream::error_stream(),
3061 "Bad min heap free percentage size: %s\n",
3062 option->optionString);
3063 return JNI_EINVAL;
3064 } else {
3065 if (FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf) != Flag::SUCCESS) {
3066 return JNI_EINVAL;
3067 }
3068 }
3069 // -Xss
3070 } else if (match_option(option, "-Xss", &tail)) {
3071 intx value = 0;
3072 jint err = parse_xss(option, tail, &value);
3073 if (err != JNI_OK) {
3074 return err;
3075 }
3076 if (FLAG_SET_CMDLINE(intx, ThreadStackSize, value) != Flag::SUCCESS) {
3077 return JNI_EINVAL;
3078 }
3079 } else if (match_option(option, "-XX:CodeCacheExpansionSize=", &tail)) {
3080 julong long_CodeCacheExpansionSize = 0;
3081 ArgsRange errcode = parse_memory_size(tail, &long_CodeCacheExpansionSize, os::vm_page_size());
3082 if (errcode != arg_in_range) {
3083 jio_fprintf(defaultStream::error_stream(),
3084 "Invalid argument: %s. Must be at least %luK.\n", option->optionString,
3085 os::vm_page_size()/K);
3086 return JNI_EINVAL;
3087 }
3088 if (FLAG_SET_CMDLINE(uintx, CodeCacheExpansionSize, (uintx)long_CodeCacheExpansionSize) != Flag::SUCCESS) {
3089 return JNI_EINVAL;
3090 }
3091 } else if (match_option(option, "-Xmaxjitcodesize", &tail) ||
3092 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) {
3093 julong long_ReservedCodeCacheSize = 0;
3094
3095 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1);
3096 if (errcode != arg_in_range) {
3097 jio_fprintf(defaultStream::error_stream(),
3098 "Invalid maximum code cache size: %s.\n", option->optionString);
3099 return JNI_EINVAL;
3100 }
3101 if (FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != Flag::SUCCESS) {
3102 return JNI_EINVAL;
3103 }
3104 // -XX:NonNMethodCodeHeapSize=
3105 } else if (match_option(option, "-XX:NonNMethodCodeHeapSize=", &tail)) {
3106 julong long_NonNMethodCodeHeapSize = 0;
3107
3108 ArgsRange errcode = parse_memory_size(tail, &long_NonNMethodCodeHeapSize, 1);
3109 if (errcode != arg_in_range) {
3110 jio_fprintf(defaultStream::error_stream(),
3111 "Invalid maximum non-nmethod code heap size: %s.\n", option->optionString);
3112 return JNI_EINVAL;
3113 }
3114 if (FLAG_SET_CMDLINE(uintx, NonNMethodCodeHeapSize, (uintx)long_NonNMethodCodeHeapSize) != Flag::SUCCESS) {
3115 return JNI_EINVAL;
3116 }
3117 // -XX:ProfiledCodeHeapSize=
3118 } else if (match_option(option, "-XX:ProfiledCodeHeapSize=", &tail)) {
3119 julong long_ProfiledCodeHeapSize = 0;
3120
3121 ArgsRange errcode = parse_memory_size(tail, &long_ProfiledCodeHeapSize, 1);
3122 if (errcode != arg_in_range) {
3123 jio_fprintf(defaultStream::error_stream(),
3124 "Invalid maximum profiled code heap size: %s.\n", option->optionString);
3125 return JNI_EINVAL;
3126 }
3127 if (FLAG_SET_CMDLINE(uintx, ProfiledCodeHeapSize, (uintx)long_ProfiledCodeHeapSize) != Flag::SUCCESS) {
3128 return JNI_EINVAL;
3129 }
3130 // -XX:NonProfiledCodeHeapSizee=
3131 } else if (match_option(option, "-XX:NonProfiledCodeHeapSize=", &tail)) {
3132 julong long_NonProfiledCodeHeapSize = 0;
3133
3134 ArgsRange errcode = parse_memory_size(tail, &long_NonProfiledCodeHeapSize, 1);
3135 if (errcode != arg_in_range) {
3136 jio_fprintf(defaultStream::error_stream(),
3137 "Invalid maximum non-profiled code heap size: %s.\n", option->optionString);
3138 return JNI_EINVAL;
3139 }
3140 if (FLAG_SET_CMDLINE(uintx, NonProfiledCodeHeapSize, (uintx)long_NonProfiledCodeHeapSize) != Flag::SUCCESS) {
3141 return JNI_EINVAL;
3142 }
3143 // -green
3144 } else if (match_option(option, "-green")) {
3145 jio_fprintf(defaultStream::error_stream(),
3146 "Green threads support not available\n");
3147 return JNI_EINVAL;
3148 // -native
3149 } else if (match_option(option, "-native")) {
3150 // HotSpot always uses native threads, ignore silently for compatibility
3151 // -Xrs
3152 } else if (match_option(option, "-Xrs")) {
3153 // Classic/EVM option, new functionality
3154 if (FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true) != Flag::SUCCESS) {
3155 return JNI_EINVAL;
3156 }
3157 // -Xprof
3158 } else if (match_option(option, "-Xprof")) {
3159 char version[256];
3160 // Obsolete in JDK 10
3161 JDK_Version::jdk(10).to_string(version, sizeof(version));
3162 warning("Ignoring option %s; support was removed in %s", option->optionString, version);
3163 // -Xconcurrentio
3164 } else if (match_option(option, "-Xconcurrentio")) {
3165 if (FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true) != Flag::SUCCESS) {
3166 return JNI_EINVAL;
3167 }
3168 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
3169 return JNI_EINVAL;
3170 }
3171 if (FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1) != Flag::SUCCESS) {
3172 return JNI_EINVAL;
3173 }
3174 if (FLAG_SET_CMDLINE(bool, UseTLAB, false) != Flag::SUCCESS) {
3175 return JNI_EINVAL;
3176 }
3177 if (FLAG_SET_CMDLINE(size_t, NewSizeThreadIncrease, 16 * K) != Flag::SUCCESS) { // 20Kb per thread added to new generation
3178 return JNI_EINVAL;
3179 }
3180
3181 // -Xinternalversion
3182 } else if (match_option(option, "-Xinternalversion")) {
3183 jio_fprintf(defaultStream::output_stream(), "%s\n",
3184 VM_Version::internal_vm_info_string());
3185 vm_exit(0);
3186 #ifndef PRODUCT
3187 // -Xprintflags
3188 } else if (match_option(option, "-Xprintflags")) {
3189 CommandLineFlags::printFlags(tty, false);
3190 vm_exit(0);
3191 #endif
3192 // -D
3193 } else if (match_option(option, "-D", &tail)) {
3194 const char* value;
3195 if (match_option(option, "-Djava.endorsed.dirs=", &value) &&
3196 *value!= '\0' && strcmp(value, "\"\"") != 0) {
3197 // abort if -Djava.endorsed.dirs is set
3198 jio_fprintf(defaultStream::output_stream(),
3199 "-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n"
3200 "in modular form will be supported via the concept of upgradeable modules.\n", value);
3201 return JNI_EINVAL;
3202 }
3203 if (match_option(option, "-Djava.ext.dirs=", &value) &&
3204 *value != '\0' && strcmp(value, "\"\"") != 0) {
3205 // abort if -Djava.ext.dirs is set
3206 jio_fprintf(defaultStream::output_stream(),
3207 "-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value);
3208 return JNI_EINVAL;
3209 }
3210 // Check for module related properties. They must be set using the modules
3211 // options. For example: use "--add-modules=java.sql", not
3212 // "-Djdk.module.addmods=java.sql"
3213 if (is_internal_module_property(option->optionString + 2)) {
3214 needs_module_property_warning = true;
3215 continue;
3216 }
3217
3218 if (!add_property(tail)) {
3219 return JNI_ENOMEM;
3220 }
3221 // Out of the box management support
3222 if (match_option(option, "-Dcom.sun.management", &tail)) {
3223 #if INCLUDE_MANAGEMENT
3224 if (FLAG_SET_CMDLINE(bool, ManagementServer, true) != Flag::SUCCESS) {
3225 return JNI_EINVAL;
3226 }
3227 // management agent in module jdk.management.agent
3228 if (!create_numbered_property("jdk.module.addmods", "jdk.management.agent", addmods_count++)) {
3229 return JNI_ENOMEM;
3230 }
3231 #else
3232 jio_fprintf(defaultStream::output_stream(),
3233 "-Dcom.sun.management is not supported in this VM.\n");
3234 return JNI_ERR;
3235 #endif
3236 }
3237 // -Xint
3238 } else if (match_option(option, "-Xint")) {
3239 set_mode_flags(_int);
3240 // -Xmixed
3241 } else if (match_option(option, "-Xmixed")) {
3242 set_mode_flags(_mixed);
3243 // -Xcomp
3244 } else if (match_option(option, "-Xcomp")) {
3245 // for testing the compiler; turn off all flags that inhibit compilation
3246 set_mode_flags(_comp);
3247 // -Xshare:dump
3248 } else if (match_option(option, "-Xshare:dump")) {
3249 if (FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true) != Flag::SUCCESS) {
3250 return JNI_EINVAL;
3251 }
3252 set_mode_flags(_int); // Prevent compilation, which creates objects
3253 // -Xshare:on
3254 } else if (match_option(option, "-Xshare:on")) {
3255 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
3256 return JNI_EINVAL;
3257 }
3258 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
3259 return JNI_EINVAL;
3260 }
3261 // -Xshare:auto
3262 } else if (match_option(option, "-Xshare:auto")) {
3263 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
3264 return JNI_EINVAL;
3265 }
3266 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
3267 return JNI_EINVAL;
3268 }
3269 // -Xshare:off
3270 } else if (match_option(option, "-Xshare:off")) {
3271 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, false) != Flag::SUCCESS) {
3272 return JNI_EINVAL;
3273 }
3274 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
3275 return JNI_EINVAL;
3276 }
3277 // -Xverify
3278 } else if (match_option(option, "-Xverify", &tail)) {
3279 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) {
3280 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true) != Flag::SUCCESS) {
3281 return JNI_EINVAL;
3282 }
3283 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
3284 return JNI_EINVAL;
3285 }
3286 } else if (strcmp(tail, ":remote") == 0) {
3287 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
3288 return JNI_EINVAL;
3289 }
3290 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
3291 return JNI_EINVAL;
3292 }
3293 } else if (strcmp(tail, ":none") == 0) {
3294 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
3295 return JNI_EINVAL;
3296 }
3297 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false) != Flag::SUCCESS) {
3298 return JNI_EINVAL;
3299 }
3300 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) {
3301 return JNI_EINVAL;
3302 }
3303 // -Xdebug
3304 } else if (match_option(option, "-Xdebug")) {
3305 // note this flag has been used, then ignore
3306 set_xdebug_mode(true);
3307 // -Xnoagent
3308 } else if (match_option(option, "-Xnoagent")) {
3309 // For compatibility with classic. HotSpot refuses to load the old style agent.dll.
3310 } else if (match_option(option, "-Xloggc:", &tail)) {
3311 // Deprecated flag to redirect GC output to a file. -Xloggc:<filename>
3312 log_warning(gc)("-Xloggc is deprecated. Will use -Xlog:gc:%s instead.", tail);
3313 _gc_log_filename = os::strdup_check_oom(tail);
3314 } else if (match_option(option, "-Xlog", &tail)) {
3315 bool ret = false;
3316 if (strcmp(tail, ":help") == 0) {
3317 LogConfiguration::print_command_line_help(defaultStream::output_stream());
3318 vm_exit(0);
3319 } else if (strcmp(tail, ":disable") == 0) {
3320 LogConfiguration::disable_logging();
3321 ret = true;
3322 } else if (*tail == '\0') {
3323 ret = LogConfiguration::parse_command_line_arguments();
3324 assert(ret, "-Xlog without arguments should never fail to parse");
3325 } else if (*tail == ':') {
3326 ret = LogConfiguration::parse_command_line_arguments(tail + 1);
3327 }
3328 if (ret == false) {
3329 jio_fprintf(defaultStream::error_stream(),
3330 "Invalid -Xlog option '-Xlog%s'\n",
3331 tail);
3332 return JNI_EINVAL;
3333 }
3334 // JNI hooks
3335 } else if (match_option(option, "-Xcheck", &tail)) {
3336 if (!strcmp(tail, ":jni")) {
3337 #if !INCLUDE_JNI_CHECK
3338 warning("JNI CHECKING is not supported in this VM");
3339 #else
3340 CheckJNICalls = true;
3341 #endif // INCLUDE_JNI_CHECK
3342 } else if (is_bad_option(option, args->ignoreUnrecognized,
3343 "check")) {
3344 return JNI_EINVAL;
3345 }
3346 } else if (match_option(option, "vfprintf")) {
3347 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo);
3348 } else if (match_option(option, "exit")) {
3349 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo);
3350 } else if (match_option(option, "abort")) {
3351 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo);
3352 // -XX:+AggressiveHeap
3353 } else if (match_option(option, "-XX:+AggressiveHeap")) {
3354 jint result = set_aggressive_heap_flags();
3355 if (result != JNI_OK) {
3356 return result;
3357 }
3358 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure;
3359 // and the last option wins.
3360 } else if (match_option(option, "-XX:+NeverTenure")) {
3361 if (FLAG_SET_CMDLINE(bool, NeverTenure, true) != Flag::SUCCESS) {
3362 return JNI_EINVAL;
3363 }
3364 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
3365 return JNI_EINVAL;
3366 }
3367 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1) != Flag::SUCCESS) {
3368 return JNI_EINVAL;
3369 }
3370 } else if (match_option(option, "-XX:+AlwaysTenure")) {
3371 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3372 return JNI_EINVAL;
3373 }
3374 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
3375 return JNI_EINVAL;
3376 }
3377 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0) != Flag::SUCCESS) {
3378 return JNI_EINVAL;
3379 }
3380 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) {
3381 uintx max_tenuring_thresh = 0;
3382 if (!parse_uintx(tail, &max_tenuring_thresh, 0)) {
3383 jio_fprintf(defaultStream::error_stream(),
3384 "Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail);
3385 return JNI_EINVAL;
3386 }
3387
3388 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh) != Flag::SUCCESS) {
3389 return JNI_EINVAL;
3390 }
3391
3392 if (MaxTenuringThreshold == 0) {
3393 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3394 return JNI_EINVAL;
3395 }
3396 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
3397 return JNI_EINVAL;
3398 }
3399 } else {
3400 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3401 return JNI_EINVAL;
3402 }
3403 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
3404 return JNI_EINVAL;
3405 }
3406 }
3407 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) {
3408 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false) != Flag::SUCCESS) {
3409 return JNI_EINVAL;
3410 }
3411 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true) != Flag::SUCCESS) {
3412 return JNI_EINVAL;
3413 }
3414 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) {
3415 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false) != Flag::SUCCESS) {
3416 return JNI_EINVAL;
3417 }
3418 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true) != Flag::SUCCESS) {
3419 return JNI_EINVAL;
3420 }
3421 } else if (match_option(option, "-XX:+ExtendedDTraceProbes")) {
3422 #if defined(DTRACE_ENABLED)
3423 if (FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true) != Flag::SUCCESS) {
3424 return JNI_EINVAL;
3425 }
3426 if (FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true) != Flag::SUCCESS) {
3427 return JNI_EINVAL;
3428 }
3429 if (FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true) != Flag::SUCCESS) {
3430 return JNI_EINVAL;
3431 }
3432 if (FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true) != Flag::SUCCESS) {
3433 return JNI_EINVAL;
3434 }
3435 #else // defined(DTRACE_ENABLED)
3436 jio_fprintf(defaultStream::error_stream(),
3437 "ExtendedDTraceProbes flag is not applicable for this configuration\n");
3438 return JNI_EINVAL;
3439 #endif // defined(DTRACE_ENABLED)
3440 #ifdef ASSERT
3441 } else if (match_option(option, "-XX:+FullGCALot")) {
3442 if (FLAG_SET_CMDLINE(bool, FullGCALot, true) != Flag::SUCCESS) {
3443 return JNI_EINVAL;
3444 }
3445 // disable scavenge before parallel mark-compact
3446 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
3447 return JNI_EINVAL;
3448 }
3449 #endif
3450 #if !INCLUDE_MANAGEMENT
3451 } else if (match_option(option, "-XX:+ManagementServer")) {
3452 jio_fprintf(defaultStream::error_stream(),
3453 "ManagementServer is not supported in this VM.\n");
3454 return JNI_ERR;
3455 #endif // INCLUDE_MANAGEMENT
3456 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx
3457 // Skip -XX:Flags= and -XX:VMOptionsFile= since those cases have
3458 // already been handled
3459 if ((strncmp(tail, "Flags=", strlen("Flags=")) != 0) &&
3460 (strncmp(tail, "VMOptionsFile=", strlen("VMOptionsFile=")) != 0)) {
3461 if (!process_argument(tail, args->ignoreUnrecognized, origin)) {
3462 return JNI_EINVAL;
3463 }
3464 }
3465 // Unknown option
3466 } else if (is_bad_option(option, args->ignoreUnrecognized)) {
3467 return JNI_ERR;
3468 }
3469 }
3470
3471 // PrintSharedArchiveAndExit will turn on
3472 // -Xshare:on
3473 // -Xlog:class+path=info
3474 if (PrintSharedArchiveAndExit) {
3475 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
3476 return JNI_EINVAL;
3477 }
3478 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
3479 return JNI_EINVAL;
3480 }
3481 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, path));
3482 }
3483
3484 // Change the default value for flags which have different default values
3485 // when working with older JDKs.
3486 #ifdef LINUX
3487 if (JDK_Version::current().compare_major(6) <= 0 &&
3488 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) {
3489 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false);
3490 }
3491 #endif // LINUX
3492 fix_appclasspath();
3493 return JNI_OK;
3494 }
3495
3496 void Arguments::add_patch_mod_prefix(const char* module_name, const char* path, bool* patch_mod_javabase) {
3497 // For java.base check for duplicate --patch-module options being specified on the command line.
3498 // This check is only required for java.base, all other duplicate module specifications
3499 // will be checked during module system initialization. The module system initialization
3500 // will throw an ExceptionInInitializerError if this situation occurs.
3501 if (strcmp(module_name, JAVA_BASE_NAME) == 0) {
3502 if (*patch_mod_javabase) {
3503 vm_exit_during_initialization("Cannot specify " JAVA_BASE_NAME " more than once to --patch-module");
3504 } else {
3505 *patch_mod_javabase = true;
3506 }
3507 }
3508
3509 // Create GrowableArray lazily, only if --patch-module has been specified
3510 if (_patch_mod_prefix == NULL) {
3511 _patch_mod_prefix = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<ModulePatchPath*>(10, true);
3512 }
3513
3514 _patch_mod_prefix->push(new ModulePatchPath(module_name, path));
3515 }
3516
3517 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled)
3518 //
3519 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar
3520 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar".
3521 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty
3522 // path is treated as the current directory.
3523 //
3524 // This causes problems with CDS, which requires that all directories specified in the classpath
3525 // must be empty. In most cases, applications do NOT want to load classes from the current
3526 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up
3527 // scripts compatible with CDS.
3528 void Arguments::fix_appclasspath() {
3529 if (IgnoreEmptyClassPaths) {
3530 const char separator = *os::path_separator();
3531 const char* src = _java_class_path->value();
3532
3533 // skip over all the leading empty paths
3534 while (*src == separator) {
3535 src ++;
3536 }
3537
3538 char* copy = os::strdup_check_oom(src, mtArguments);
3539
3540 // trim all trailing empty paths
3541 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) {
3542 *tail = '\0';
3543 }
3544
3545 char from[3] = {separator, separator, '\0'};
3546 char to [2] = {separator, '\0'};
3547 while (StringUtils::replace_no_expand(copy, from, to) > 0) {
3548 // Keep replacing "::" -> ":" until we have no more "::" (non-windows)
3549 // Keep replacing ";;" -> ";" until we have no more ";;" (windows)
3550 }
3551
3552 _java_class_path->set_writeable_value(copy);
3553 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore
3554 }
3555 }
3556
3557 static bool has_jar_files(const char* directory) {
3558 DIR* dir = os::opendir(directory);
3559 if (dir == NULL) return false;
3560
3561 struct dirent *entry;
3562 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtArguments);
3563 bool hasJarFile = false;
3564 while (!hasJarFile && (entry = os::readdir(dir, (dirent *) dbuf)) != NULL) {
3565 const char* name = entry->d_name;
3566 const char* ext = name + strlen(name) - 4;
3567 hasJarFile = ext > name && (os::file_name_strcmp(ext, ".jar") == 0);
3568 }
3569 FREE_C_HEAP_ARRAY(char, dbuf);
3570 os::closedir(dir);
3571 return hasJarFile ;
3572 }
3573
3574 static int check_non_empty_dirs(const char* path) {
3575 const char separator = *os::path_separator();
3576 const char* const end = path + strlen(path);
3577 int nonEmptyDirs = 0;
3578 while (path < end) {
3579 const char* tmp_end = strchr(path, separator);
3580 if (tmp_end == NULL) {
3581 if (has_jar_files(path)) {
3582 nonEmptyDirs++;
3583 jio_fprintf(defaultStream::output_stream(),
3584 "Non-empty directory: %s\n", path);
3585 }
3586 path = end;
3587 } else {
3588 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1, mtArguments);
3589 memcpy(dirpath, path, tmp_end - path);
3590 dirpath[tmp_end - path] = '\0';
3591 if (has_jar_files(dirpath)) {
3592 nonEmptyDirs++;
3593 jio_fprintf(defaultStream::output_stream(),
3594 "Non-empty directory: %s\n", dirpath);
3595 }
3596 FREE_C_HEAP_ARRAY(char, dirpath);
3597 path = tmp_end + 1;
3598 }
3599 }
3600 return nonEmptyDirs;
3601 }
3602
3603 jint Arguments::finalize_vm_init_args(bool patch_mod_javabase) {
3604 // check if the default lib/endorsed directory exists; if so, error
3605 char path[JVM_MAXPATHLEN];
3606 const char* fileSep = os::file_separator();
3607 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep);
3608
3609 if (CheckEndorsedAndExtDirs) {
3610 int nonEmptyDirs = 0;
3611 // check endorsed directory
3612 nonEmptyDirs += check_non_empty_dirs(path);
3613 // check the extension directories
3614 nonEmptyDirs += check_non_empty_dirs(Arguments::get_ext_dirs());
3615 if (nonEmptyDirs > 0) {
3616 return JNI_ERR;
3617 }
3618 }
3619
3620 DIR* dir = os::opendir(path);
3621 if (dir != NULL) {
3622 jio_fprintf(defaultStream::output_stream(),
3623 "<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n"
3624 "in modular form will be supported via the concept of upgradeable modules.\n");
3625 os::closedir(dir);
3626 return JNI_ERR;
3627 }
3628
3629 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep);
3630 dir = os::opendir(path);
3631 if (dir != NULL) {
3632 jio_fprintf(defaultStream::output_stream(),
3633 "<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; "
3634 "Use -classpath instead.\n.");
3635 os::closedir(dir);
3636 return JNI_ERR;
3637 }
3638
3639 // This must be done after all arguments have been processed.
3640 // java_compiler() true means set to "NONE" or empty.
3641 if (java_compiler() && !xdebug_mode()) {
3642 // For backwards compatibility, we switch to interpreted mode if
3643 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was
3644 // not specified.
3645 set_mode_flags(_int);
3646 }
3647
3648 // CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode),
3649 // but like -Xint, leave compilation thresholds unaffected.
3650 // With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well.
3651 if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) {
3652 set_mode_flags(_int);
3653 }
3654
3655 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set
3656 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) {
3657 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold);
3658 }
3659
3660 #if !defined(COMPILER2) && !INCLUDE_JVMCI
3661 // Don't degrade server performance for footprint
3662 if (FLAG_IS_DEFAULT(UseLargePages) &&
3663 MaxHeapSize < LargePageHeapSizeThreshold) {
3664 // No need for large granularity pages w/small heaps.
3665 // Note that large pages are enabled/disabled for both the
3666 // Java heap and the code cache.
3667 FLAG_SET_DEFAULT(UseLargePages, false);
3668 }
3669
3670 #elif defined(COMPILER2)
3671 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) {
3672 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1);
3673 }
3674 #endif
3675
3676 #if !defined(COMPILER2) && !INCLUDE_JVMCI
3677 UNSUPPORTED_OPTION(ProfileInterpreter);
3678 NOT_PRODUCT(UNSUPPORTED_OPTION(TraceProfileInterpreter));
3679 #endif
3680
3681 #ifndef TIERED
3682 // Tiered compilation is undefined.
3683 UNSUPPORTED_OPTION(TieredCompilation);
3684 #endif
3685
3686 #if INCLUDE_JVMCI
3687 if (EnableJVMCI &&
3688 !create_numbered_property("jdk.module.addmods", "jdk.internal.vm.ci", addmods_count++)) {
3689 return JNI_ENOMEM;
3690 }
3691 #endif
3692
3693 // If we are running in a headless jre, force java.awt.headless property
3694 // to be true unless the property has already been set.
3695 // Also allow the OS environment variable JAVA_AWT_HEADLESS to set headless state.
3696 if (os::is_headless_jre()) {
3697 const char* headless = Arguments::get_property("java.awt.headless");
3698 if (headless == NULL) {
3699 const char *headless_env = ::getenv("JAVA_AWT_HEADLESS");
3700 if (headless_env == NULL) {
3701 if (!add_property("java.awt.headless=true")) {
3702 return JNI_ENOMEM;
3703 }
3704 } else {
3705 char buffer[256];
3706 jio_snprintf(buffer, sizeof(buffer), "java.awt.headless=%s", headless_env);
3707 if (!add_property(buffer)) {
3708 return JNI_ENOMEM;
3709 }
3710 }
3711 }
3712 }
3713
3714 if (!check_vm_args_consistency()) {
3715 return JNI_ERR;
3716 }
3717
3718 #if INCLUDE_JVMCI
3719 if (UseJVMCICompiler) {
3720 Compilation_mode = CompMode_server;
3721 }
3722 #endif
3723
3724 #if INCLUDE_CDS
3725 if (DumpSharedSpaces) {
3726 // Disable biased locking now as it interferes with the clean up of
3727 // the archived Klasses and Java string objects (at dump time only).
3728 UseBiasedLocking = false;
3729 }
3730 if (UseSharedSpaces && patch_mod_javabase) {
3731 no_shared_spaces("CDS is disabled when " JAVA_BASE_NAME " module is patched.");
3732 }
3733 #endif
3734
3735 return JNI_OK;
3736 }
3737
3738 // Helper class for controlling the lifetime of JavaVMInitArgs
3739 // objects. The contents of the JavaVMInitArgs are guaranteed to be
3740 // deleted on the destruction of the ScopedVMInitArgs object.
3741 class ScopedVMInitArgs : public StackObj {
3742 private:
3743 JavaVMInitArgs _args;
3744 char* _container_name;
3745 bool _is_set;
3746 char* _vm_options_file_arg;
3747
3748 public:
3749 ScopedVMInitArgs(const char *container_name) {
3750 _args.version = JNI_VERSION_1_2;
3751 _args.nOptions = 0;
3752 _args.options = NULL;
3753 _args.ignoreUnrecognized = false;
3754 _container_name = (char *)container_name;
3755 _is_set = false;
3756 _vm_options_file_arg = NULL;
3757 }
3758
3759 // Populates the JavaVMInitArgs object represented by this
3760 // ScopedVMInitArgs object with the arguments in options. The
3761 // allocated memory is deleted by the destructor. If this method
3762 // returns anything other than JNI_OK, then this object is in a
3763 // partially constructed state, and should be abandoned.
3764 jint set_args(GrowableArray<JavaVMOption>* options) {
3765 _is_set = true;
3766 JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL(
3767 JavaVMOption, options->length(), mtArguments);
3768 if (options_arr == NULL) {
3769 return JNI_ENOMEM;
3770 }
3771 _args.options = options_arr;
3772
3773 for (int i = 0; i < options->length(); i++) {
3774 options_arr[i] = options->at(i);
3775 options_arr[i].optionString = os::strdup(options_arr[i].optionString);
3776 if (options_arr[i].optionString == NULL) {
3777 // Rely on the destructor to do cleanup.
3778 _args.nOptions = i;
3779 return JNI_ENOMEM;
3780 }
3781 }
3782
3783 _args.nOptions = options->length();
3784 _args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions;
3785 return JNI_OK;
3786 }
3787
3788 JavaVMInitArgs* get() { return &_args; }
3789 char* container_name() { return _container_name; }
3790 bool is_set() { return _is_set; }
3791 bool found_vm_options_file_arg() { return _vm_options_file_arg != NULL; }
3792 char* vm_options_file_arg() { return _vm_options_file_arg; }
3793
3794 void set_vm_options_file_arg(const char *vm_options_file_arg) {
3795 if (_vm_options_file_arg != NULL) {
3796 os::free(_vm_options_file_arg);
3797 }
3798 _vm_options_file_arg = os::strdup_check_oom(vm_options_file_arg);
3799 }
3800
3801 ~ScopedVMInitArgs() {
3802 if (_vm_options_file_arg != NULL) {
3803 os::free(_vm_options_file_arg);
3804 }
3805 if (_args.options == NULL) return;
3806 for (int i = 0; i < _args.nOptions; i++) {
3807 os::free(_args.options[i].optionString);
3808 }
3809 FREE_C_HEAP_ARRAY(JavaVMOption, _args.options);
3810 }
3811
3812 // Insert options into this option list, to replace option at
3813 // vm_options_file_pos (-XX:VMOptionsFile)
3814 jint insert(const JavaVMInitArgs* args,
3815 const JavaVMInitArgs* args_to_insert,
3816 const int vm_options_file_pos) {
3817 assert(_args.options == NULL, "shouldn't be set yet");
3818 assert(args_to_insert->nOptions != 0, "there should be args to insert");
3819 assert(vm_options_file_pos != -1, "vm_options_file_pos should be set");
3820
3821 int length = args->nOptions + args_to_insert->nOptions - 1;
3822 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments)
3823 GrowableArray<JavaVMOption>(length, true); // Construct new option array
3824 for (int i = 0; i < args->nOptions; i++) {
3825 if (i == vm_options_file_pos) {
3826 // insert the new options starting at the same place as the
3827 // -XX:VMOptionsFile option
3828 for (int j = 0; j < args_to_insert->nOptions; j++) {
3829 options->push(args_to_insert->options[j]);
3830 }
3831 } else {
3832 options->push(args->options[i]);
3833 }
3834 }
3835 // make into options array
3836 jint result = set_args(options);
3837 delete options;
3838 return result;
3839 }
3840 };
3841
3842 jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) {
3843 return parse_options_environment_variable("_JAVA_OPTIONS", args);
3844 }
3845
3846 jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) {
3847 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args);
3848 }
3849
3850 jint Arguments::parse_options_environment_variable(const char* name,
3851 ScopedVMInitArgs* vm_args) {
3852 char *buffer = ::getenv(name);
3853
3854 // Don't check this environment variable if user has special privileges
3855 // (e.g. unix su command).
3856 if (buffer == NULL || os::have_special_privileges()) {
3857 return JNI_OK;
3858 }
3859
3860 if ((buffer = os::strdup(buffer)) == NULL) {
3861 return JNI_ENOMEM;
3862 }
3863
3864 jio_fprintf(defaultStream::error_stream(),
3865 "Picked up %s: %s\n", name, buffer);
3866
3867 int retcode = parse_options_buffer(name, buffer, strlen(buffer), vm_args);
3868
3869 os::free(buffer);
3870 return retcode;
3871 }
3872
3873 jint Arguments::parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args) {
3874 // read file into buffer
3875 int fd = ::open(file_name, O_RDONLY);
3876 if (fd < 0) {
3877 jio_fprintf(defaultStream::error_stream(),
3878 "Could not open options file '%s'\n",
3879 file_name);
3880 return JNI_ERR;
3881 }
3882
3883 struct stat stbuf;
3884 int retcode = os::stat(file_name, &stbuf);
3885 if (retcode != 0) {
3886 jio_fprintf(defaultStream::error_stream(),
3887 "Could not stat options file '%s'\n",
3888 file_name);
3889 os::close(fd);
3890 return JNI_ERR;
3891 }
3892
3893 if (stbuf.st_size == 0) {
3894 // tell caller there is no option data and that is ok
3895 os::close(fd);
3896 return JNI_OK;
3897 }
3898
3899 // '+ 1' for NULL termination even with max bytes
3900 size_t bytes_alloc = stbuf.st_size + 1;
3901
3902 char *buf = NEW_C_HEAP_ARRAY_RETURN_NULL(char, bytes_alloc, mtArguments);
3903 if (NULL == buf) {
3904 jio_fprintf(defaultStream::error_stream(),
3905 "Could not allocate read buffer for options file parse\n");
3906 os::close(fd);
3907 return JNI_ENOMEM;
3908 }
3909
3910 memset(buf, 0, bytes_alloc);
3911
3912 // Fill buffer
3913 // Use ::read() instead of os::read because os::read()
3914 // might do a thread state transition
3915 // and it is too early for that here
3916
3917 ssize_t bytes_read = ::read(fd, (void *)buf, (unsigned)bytes_alloc);
3918 os::close(fd);
3919 if (bytes_read < 0) {
3920 FREE_C_HEAP_ARRAY(char, buf);
3921 jio_fprintf(defaultStream::error_stream(),
3922 "Could not read options file '%s'\n", file_name);
3923 return JNI_ERR;
3924 }
3925
3926 if (bytes_read == 0) {
3927 // tell caller there is no option data and that is ok
3928 FREE_C_HEAP_ARRAY(char, buf);
3929 return JNI_OK;
3930 }
3931
3932 retcode = parse_options_buffer(file_name, buf, bytes_read, vm_args);
3933
3934 FREE_C_HEAP_ARRAY(char, buf);
3935 return retcode;
3936 }
3937
3938 jint Arguments::parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args) {
3939 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<JavaVMOption>(2, true); // Construct option array
3940
3941 // some pointers to help with parsing
3942 char *buffer_end = buffer + buf_len;
3943 char *opt_hd = buffer;
3944 char *wrt = buffer;
3945 char *rd = buffer;
3946
3947 // parse all options
3948 while (rd < buffer_end) {
3949 // skip leading white space from the input string
3950 while (rd < buffer_end && isspace(*rd)) {
3951 rd++;
3952 }
3953
3954 if (rd >= buffer_end) {
3955 break;
3956 }
3957
3958 // Remember this is where we found the head of the token.
3959 opt_hd = wrt;
3960
3961 // Tokens are strings of non white space characters separated
3962 // by one or more white spaces.
3963 while (rd < buffer_end && !isspace(*rd)) {
3964 if (*rd == '\'' || *rd == '"') { // handle a quoted string
3965 int quote = *rd; // matching quote to look for
3966 rd++; // don't copy open quote
3967 while (rd < buffer_end && *rd != quote) {
3968 // include everything (even spaces)
3969 // up until the close quote
3970 *wrt++ = *rd++; // copy to option string
3971 }
3972
3973 if (rd < buffer_end) {
3974 rd++; // don't copy close quote
3975 } else {
3976 // did not see closing quote
3977 jio_fprintf(defaultStream::error_stream(),
3978 "Unmatched quote in %s\n", name);
3979 delete options;
3980 return JNI_ERR;
3981 }
3982 } else {
3983 *wrt++ = *rd++; // copy to option string
3984 }
3985 }
3986
3987 // steal a white space character and set it to NULL
3988 *wrt++ = '\0';
3989 // We now have a complete token
3990
3991 JavaVMOption option;
3992 option.optionString = opt_hd;
3993 option.extraInfo = NULL;
3994
3995 options->append(option); // Fill in option
3996
3997 rd++; // Advance to next character
3998 }
3999
4000 // Fill out JavaVMInitArgs structure.
4001 jint status = vm_args->set_args(options);
4002
4003 delete options;
4004 return status;
4005 }
4006
4007 void Arguments::set_shared_spaces_flags() {
4008 if (DumpSharedSpaces) {
4009 if (FailOverToOldVerifier) {
4010 // Don't fall back to the old verifier on verification failure. If a
4011 // class fails verification with the split verifier, it might fail the
4012 // CDS runtime verifier constraint check. In that case, we don't want
4013 // to share the class. We only archive classes that pass the split verifier.
4014 FLAG_SET_DEFAULT(FailOverToOldVerifier, false);
4015 }
4016
4017 if (RequireSharedSpaces) {
4018 warning("Cannot dump shared archive while using shared archive");
4019 }
4020 UseSharedSpaces = false;
4021 #ifdef _LP64
4022 if (!UseCompressedOops || !UseCompressedClassPointers) {
4023 vm_exit_during_initialization(
4024 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL);
4025 }
4026 } else {
4027 if (!UseCompressedOops || !UseCompressedClassPointers) {
4028 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces.");
4029 }
4030 #endif
4031 }
4032 }
4033
4034 // Sharing support
4035 // Construct the path to the archive
4036 static char* get_shared_archive_path() {
4037 char *shared_archive_path;
4038 if (SharedArchiveFile == NULL) {
4039 char jvm_path[JVM_MAXPATHLEN];
4040 os::jvm_path(jvm_path, sizeof(jvm_path));
4041 char *end = strrchr(jvm_path, *os::file_separator());
4042 if (end != NULL) *end = '\0';
4043 size_t jvm_path_len = strlen(jvm_path);
4044 size_t file_sep_len = strlen(os::file_separator());
4045 const size_t len = jvm_path_len + file_sep_len + 20;
4046 shared_archive_path = NEW_C_HEAP_ARRAY(char, len, mtArguments);
4047 if (shared_archive_path != NULL) {
4048 jio_snprintf(shared_archive_path, len, "%s%sclasses.jsa",
4049 jvm_path, os::file_separator());
4050 }
4051 } else {
4052 shared_archive_path = os::strdup_check_oom(SharedArchiveFile, mtArguments);
4053 }
4054 return shared_archive_path;
4055 }
4056
4057 #ifndef PRODUCT
4058 // Determine whether LogVMOutput should be implicitly turned on.
4059 static bool use_vm_log() {
4060 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) ||
4061 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods ||
4062 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers ||
4063 PrintAssembly || TraceDeoptimization || TraceDependencies ||
4064 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) {
4065 return true;
4066 }
4067
4068 #ifdef COMPILER1
4069 if (PrintC1Statistics) {
4070 return true;
4071 }
4072 #endif // COMPILER1
4073
4074 #ifdef COMPILER2
4075 if (PrintOptoAssembly || PrintOptoStatistics) {
4076 return true;
4077 }
4078 #endif // COMPILER2
4079
4080 return false;
4081 }
4082
4083 #endif // PRODUCT
4084
4085 bool Arguments::args_contains_vm_options_file_arg(const JavaVMInitArgs* args) {
4086 for (int index = 0; index < args->nOptions; index++) {
4087 const JavaVMOption* option = args->options + index;
4088 const char* tail;
4089 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
4090 return true;
4091 }
4092 }
4093 return false;
4094 }
4095
4096 jint Arguments::insert_vm_options_file(const JavaVMInitArgs* args,
4097 const char* vm_options_file,
4098 const int vm_options_file_pos,
4099 ScopedVMInitArgs* vm_options_file_args,
4100 ScopedVMInitArgs* args_out) {
4101 jint code = parse_vm_options_file(vm_options_file, vm_options_file_args);
4102 if (code != JNI_OK) {
4103 return code;
4104 }
4105
4106 if (vm_options_file_args->get()->nOptions < 1) {
4107 return JNI_OK;
4108 }
4109
4110 if (args_contains_vm_options_file_arg(vm_options_file_args->get())) {
4111 jio_fprintf(defaultStream::error_stream(),
4112 "A VM options file may not refer to a VM options file. "
4113 "Specification of '-XX:VMOptionsFile=<file-name>' in the "
4114 "options file '%s' in options container '%s' is an error.\n",
4115 vm_options_file_args->vm_options_file_arg(),
4116 vm_options_file_args->container_name());
4117 return JNI_EINVAL;
4118 }
4119
4120 return args_out->insert(args, vm_options_file_args->get(),
4121 vm_options_file_pos);
4122 }
4123
4124 // Expand -XX:VMOptionsFile found in args_in as needed.
4125 // mod_args and args_out parameters may return values as needed.
4126 jint Arguments::expand_vm_options_as_needed(const JavaVMInitArgs* args_in,
4127 ScopedVMInitArgs* mod_args,
4128 JavaVMInitArgs** args_out) {
4129 jint code = match_special_option_and_act(args_in, mod_args);
4130 if (code != JNI_OK) {
4131 return code;
4132 }
4133
4134 if (mod_args->is_set()) {
4135 // args_in contains -XX:VMOptionsFile and mod_args contains the
4136 // original options from args_in along with the options expanded
4137 // from the VMOptionsFile. Return a short-hand to the caller.
4138 *args_out = mod_args->get();
4139 } else {
4140 *args_out = (JavaVMInitArgs *)args_in; // no changes so use args_in
4141 }
4142 return JNI_OK;
4143 }
4144
4145 jint Arguments::match_special_option_and_act(const JavaVMInitArgs* args,
4146 ScopedVMInitArgs* args_out) {
4147 // Remaining part of option string
4148 const char* tail;
4149 ScopedVMInitArgs vm_options_file_args(args_out->container_name());
4150
4151 for (int index = 0; index < args->nOptions; index++) {
4152 const JavaVMOption* option = args->options + index;
4153 if (ArgumentsExt::process_options(option)) {
4154 continue;
4155 }
4156 if (match_option(option, "-XX:Flags=", &tail)) {
4157 Arguments::set_jvm_flags_file(tail);
4158 continue;
4159 }
4160 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
4161 if (vm_options_file_args.found_vm_options_file_arg()) {
4162 jio_fprintf(defaultStream::error_stream(),
4163 "The option '%s' is already specified in the options "
4164 "container '%s' so the specification of '%s' in the "
4165 "same options container is an error.\n",
4166 vm_options_file_args.vm_options_file_arg(),
4167 vm_options_file_args.container_name(),
4168 option->optionString);
4169 return JNI_EINVAL;
4170 }
4171 vm_options_file_args.set_vm_options_file_arg(option->optionString);
4172 // If there's a VMOptionsFile, parse that
4173 jint code = insert_vm_options_file(args, tail, index,
4174 &vm_options_file_args, args_out);
4175 if (code != JNI_OK) {
4176 return code;
4177 }
4178 args_out->set_vm_options_file_arg(vm_options_file_args.vm_options_file_arg());
4179 if (args_out->is_set()) {
4180 // The VMOptions file inserted some options so switch 'args'
4181 // to the new set of options, and continue processing which
4182 // preserves "last option wins" semantics.
4183 args = args_out->get();
4184 // The first option from the VMOptionsFile replaces the
4185 // current option. So we back track to process the
4186 // replacement option.
4187 index--;
4188 }
4189 continue;
4190 }
4191 if (match_option(option, "-XX:+PrintVMOptions")) {
4192 PrintVMOptions = true;
4193 continue;
4194 }
4195 if (match_option(option, "-XX:-PrintVMOptions")) {
4196 PrintVMOptions = false;
4197 continue;
4198 }
4199 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) {
4200 IgnoreUnrecognizedVMOptions = true;
4201 continue;
4202 }
4203 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) {
4204 IgnoreUnrecognizedVMOptions = false;
4205 continue;
4206 }
4207 if (match_option(option, "-XX:+PrintFlagsInitial")) {
4208 CommandLineFlags::printFlags(tty, false);
4209 vm_exit(0);
4210 }
4211 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) {
4212 #if INCLUDE_NMT
4213 // The launcher did not setup nmt environment variable properly.
4214 if (!MemTracker::check_launcher_nmt_support(tail)) {
4215 warning("Native Memory Tracking did not setup properly, using wrong launcher?");
4216 }
4217
4218 // Verify if nmt option is valid.
4219 if (MemTracker::verify_nmt_option()) {
4220 // Late initialization, still in single-threaded mode.
4221 if (MemTracker::tracking_level() >= NMT_summary) {
4222 MemTracker::init();
4223 }
4224 } else {
4225 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL);
4226 }
4227 continue;
4228 #else
4229 jio_fprintf(defaultStream::error_stream(),
4230 "Native Memory Tracking is not supported in this VM\n");
4231 return JNI_ERR;
4232 #endif
4233 }
4234
4235 #ifndef PRODUCT
4236 if (match_option(option, "-XX:+PrintFlagsWithComments")) {
4237 CommandLineFlags::printFlags(tty, true);
4238 vm_exit(0);
4239 }
4240 #endif
4241 }
4242 return JNI_OK;
4243 }
4244
4245 static void print_options(const JavaVMInitArgs *args) {
4246 const char* tail;
4247 for (int index = 0; index < args->nOptions; index++) {
4248 const JavaVMOption *option = args->options + index;
4249 if (match_option(option, "-XX:", &tail)) {
4250 logOption(tail);
4251 }
4252 }
4253 }
4254
4255 bool Arguments::handle_deprecated_print_gc_flags() {
4256 if (PrintGC) {
4257 log_warning(gc)("-XX:+PrintGC is deprecated. Will use -Xlog:gc instead.");
4258 }
4259 if (PrintGCDetails) {
4260 log_warning(gc)("-XX:+PrintGCDetails is deprecated. Will use -Xlog:gc* instead.");
4261 }
4262
4263 if (_gc_log_filename != NULL) {
4264 // -Xloggc was used to specify a filename
4265 const char* gc_conf = PrintGCDetails ? "gc*" : "gc";
4266
4267 LogTarget(Error, logging) target;
4268 LogStream errstream(target);
4269 return LogConfiguration::parse_log_arguments(_gc_log_filename, gc_conf, NULL, NULL, &errstream);
4270 } else if (PrintGC || PrintGCDetails) {
4271 LogConfiguration::configure_stdout(LogLevel::Info, !PrintGCDetails, LOG_TAGS(gc));
4272 }
4273 return true;
4274 }
4275
4276 void Arguments::handle_extra_cms_flags(const char* msg) {
4277 SpecialFlag flag;
4278 const char *flag_name = "UseConcMarkSweepGC";
4279 if (lookup_special_flag(flag_name, flag)) {
4280 handle_aliases_and_deprecation(flag_name, /* print warning */ true);
4281 warning("%s", msg);
4282 }
4283 }
4284
4285 // Parse entry point called from JNI_CreateJavaVM
4286
4287 jint Arguments::parse(const JavaVMInitArgs* initial_cmd_args) {
4288 assert(verify_special_jvm_flags(), "deprecated and obsolete flag table inconsistent");
4289
4290 // Initialize ranges, constraints and writeables
4291 CommandLineFlagRangeList::init();
4292 CommandLineFlagConstraintList::init();
4293 CommandLineFlagWriteableList::init();
4294
4295 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed.
4296 const char* hotspotrc = ".hotspotrc";
4297 bool settings_file_specified = false;
4298 bool needs_hotspotrc_warning = false;
4299 ScopedVMInitArgs initial_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
4300 ScopedVMInitArgs initial_java_options_args("env_var='_JAVA_OPTIONS'");
4301
4302 // Pointers to current working set of containers
4303 JavaVMInitArgs* cur_cmd_args;
4304 JavaVMInitArgs* cur_java_options_args;
4305 JavaVMInitArgs* cur_java_tool_options_args;
4306
4307 // Containers for modified/expanded options
4308 ScopedVMInitArgs mod_cmd_args("cmd_line_args");
4309 ScopedVMInitArgs mod_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
4310 ScopedVMInitArgs mod_java_options_args("env_var='_JAVA_OPTIONS'");
4311
4312
4313 jint code =
4314 parse_java_tool_options_environment_variable(&initial_java_tool_options_args);
4315 if (code != JNI_OK) {
4316 return code;
4317 }
4318
4319 code = parse_java_options_environment_variable(&initial_java_options_args);
4320 if (code != JNI_OK) {
4321 return code;
4322 }
4323
4324 code = expand_vm_options_as_needed(initial_java_tool_options_args.get(),
4325 &mod_java_tool_options_args,
4326 &cur_java_tool_options_args);
4327 if (code != JNI_OK) {
4328 return code;
4329 }
4330
4331 code = expand_vm_options_as_needed(initial_cmd_args,
4332 &mod_cmd_args,
4333 &cur_cmd_args);
4334 if (code != JNI_OK) {
4335 return code;
4336 }
4337
4338 code = expand_vm_options_as_needed(initial_java_options_args.get(),
4339 &mod_java_options_args,
4340 &cur_java_options_args);
4341 if (code != JNI_OK) {
4342 return code;
4343 }
4344
4345 const char* flags_file = Arguments::get_jvm_flags_file();
4346 settings_file_specified = (flags_file != NULL);
4347
4348 if (IgnoreUnrecognizedVMOptions) {
4349 cur_cmd_args->ignoreUnrecognized = true;
4350 cur_java_tool_options_args->ignoreUnrecognized = true;
4351 cur_java_options_args->ignoreUnrecognized = true;
4352 }
4353
4354 // Parse specified settings file
4355 if (settings_file_specified) {
4356 if (!process_settings_file(flags_file, true,
4357 cur_cmd_args->ignoreUnrecognized)) {
4358 return JNI_EINVAL;
4359 }
4360 } else {
4361 #ifdef ASSERT
4362 // Parse default .hotspotrc settings file
4363 if (!process_settings_file(".hotspotrc", false,
4364 cur_cmd_args->ignoreUnrecognized)) {
4365 return JNI_EINVAL;
4366 }
4367 #else
4368 struct stat buf;
4369 if (os::stat(hotspotrc, &buf) == 0) {
4370 needs_hotspotrc_warning = true;
4371 }
4372 #endif
4373 }
4374
4375 if (PrintVMOptions) {
4376 print_options(cur_java_tool_options_args);
4377 print_options(cur_cmd_args);
4378 print_options(cur_java_options_args);
4379 }
4380
4381 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS
4382 jint result = parse_vm_init_args(cur_java_tool_options_args,
4383 cur_java_options_args,
4384 cur_cmd_args);
4385
4386 if (result != JNI_OK) {
4387 return result;
4388 }
4389
4390 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed.
4391 SharedArchivePath = get_shared_archive_path();
4392 if (SharedArchivePath == NULL) {
4393 return JNI_ENOMEM;
4394 }
4395
4396 // Set up VerifySharedSpaces
4397 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) {
4398 VerifySharedSpaces = true;
4399 }
4400
4401 // Delay warning until here so that we've had a chance to process
4402 // the -XX:-PrintWarnings flag
4403 if (needs_hotspotrc_warning) {
4404 warning("%s file is present but has been ignored. "
4405 "Run with -XX:Flags=%s to load the file.",
4406 hotspotrc, hotspotrc);
4407 }
4408
4409 if (needs_module_property_warning) {
4410 warning("Ignoring system property options whose names match the '-Djdk.module.*'."
4411 " names that are reserved for internal use.");
4412 }
4413
4414 #if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
4415 UNSUPPORTED_OPTION(UseLargePages);
4416 #endif
4417
4418 ArgumentsExt::report_unsupported_options();
4419
4420 #ifndef PRODUCT
4421 if (TraceBytecodesAt != 0) {
4422 TraceBytecodes = true;
4423 }
4424 if (CountCompiledCalls) {
4425 if (UseCounterDecay) {
4426 warning("UseCounterDecay disabled because CountCalls is set");
4427 UseCounterDecay = false;
4428 }
4429 }
4430 #endif // PRODUCT
4431
4432 if (ScavengeRootsInCode == 0) {
4433 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) {
4434 warning("Forcing ScavengeRootsInCode non-zero");
4435 }
4436 ScavengeRootsInCode = 1;
4437 }
4438
4439 if (!handle_deprecated_print_gc_flags()) {
4440 return JNI_EINVAL;
4441 }
4442
4443 // Set object alignment values.
4444 set_object_alignment();
4445
4446 #if !INCLUDE_CDS
4447 if (DumpSharedSpaces || RequireSharedSpaces) {
4448 jio_fprintf(defaultStream::error_stream(),
4449 "Shared spaces are not supported in this VM\n");
4450 return JNI_ERR;
4451 }
4452 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) ||
4453 log_is_enabled(Info, cds)) {
4454 warning("Shared spaces are not supported in this VM");
4455 FLAG_SET_DEFAULT(UseSharedSpaces, false);
4456 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(cds));
4457 }
4458 no_shared_spaces("CDS Disabled");
4459 #endif // INCLUDE_CDS
4460
4461 return JNI_OK;
4462 }
4463
4464 jint Arguments::apply_ergo() {
4465 // Set flags based on ergonomics.
4466 set_ergonomics_flags();
4467
4468 #if INCLUDE_JVMCI
4469 set_jvmci_specific_flags();
4470 #endif
4471
4472 set_shared_spaces_flags();
4473
4474 // Check the GC selections again.
4475 if (!check_gc_consistency()) {
4476 return JNI_EINVAL;
4477 }
4478
4479 if (TieredCompilation) {
4480 set_tiered_flags();
4481 } else {
4482 int max_compilation_policy_choice = 1;
4483 #ifdef COMPILER2
4484 if (is_server_compilation_mode_vm()) {
4485 max_compilation_policy_choice = 2;
4486 }
4487 #endif
4488 // Check if the policy is valid.
4489 if (CompilationPolicyChoice >= max_compilation_policy_choice) {
4490 vm_exit_during_initialization(
4491 "Incompatible compilation policy selected", NULL);
4492 }
4493 // Scale CompileThreshold
4494 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves CompileThreshold unchanged.
4495 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
4496 FLAG_SET_ERGO(intx, CompileThreshold, scaled_compile_threshold(CompileThreshold));
4497 }
4498 }
4499
4500 #ifdef COMPILER2
4501 #ifndef PRODUCT
4502 if (PrintIdealGraphLevel > 0) {
4503 FLAG_SET_ERGO(bool, PrintIdealGraph, true);
4504 }
4505 #endif
4506 #endif
4507
4508 // Set heap size based on available physical memory
4509 set_heap_size();
4510
4511 ArgumentsExt::set_gc_specific_flags();
4512
4513 // Initialize Metaspace flags and alignments
4514 Metaspace::ergo_initialize();
4515
4516 // Set bytecode rewriting flags
4517 set_bytecode_flags();
4518
4519 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled
4520 jint code = set_aggressive_opts_flags();
4521 if (code != JNI_OK) {
4522 return code;
4523 }
4524
4525 // Turn off biased locking for locking debug mode flags,
4526 // which are subtly different from each other but neither works with
4527 // biased locking
4528 if (UseHeavyMonitors
4529 #ifdef COMPILER1
4530 || !UseFastLocking
4531 #endif // COMPILER1
4532 #if INCLUDE_JVMCI
4533 || !JVMCIUseFastLocking
4534 #endif
4535 ) {
4536 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) {
4537 // flag set to true on command line; warn the user that they
4538 // can't enable biased locking here
4539 warning("Biased Locking is not supported with locking debug flags"
4540 "; ignoring UseBiasedLocking flag." );
4541 }
4542 UseBiasedLocking = false;
4543 }
4544
4545 #ifdef CC_INTERP
4546 // Clear flags not supported on zero.
4547 FLAG_SET_DEFAULT(ProfileInterpreter, false);
4548 FLAG_SET_DEFAULT(UseBiasedLocking, false);
4549 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false));
4550 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false));
4551 #endif // CC_INTERP
4552
4553 #ifdef COMPILER2
4554 if (!EliminateLocks) {
4555 EliminateNestedLocks = false;
4556 }
4557 if (!Inline) {
4558 IncrementalInline = false;
4559 }
4560 #ifndef PRODUCT
4561 if (!IncrementalInline) {
4562 AlwaysIncrementalInline = false;
4563 }
4564 #endif
4565 if (!UseTypeSpeculation && FLAG_IS_DEFAULT(TypeProfileLevel)) {
4566 // nothing to use the profiling, turn if off
4567 FLAG_SET_DEFAULT(TypeProfileLevel, 0);
4568 }
4569 #endif
4570
4571 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) {
4572 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output");
4573 DebugNonSafepoints = true;
4574 }
4575
4576 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) {
4577 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used");
4578 }
4579
4580 if (UseOnStackReplacement && !UseLoopCounter) {
4581 warning("On-stack-replacement requires loop counters; enabling loop counters");
4582 FLAG_SET_DEFAULT(UseLoopCounter, true);
4583 }
4584
4585 #ifndef PRODUCT
4586 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) {
4587 if (use_vm_log()) {
4588 LogVMOutput = true;
4589 }
4590 }
4591 #endif // PRODUCT
4592
4593 if (PrintCommandLineFlags) {
4594 CommandLineFlags::printSetFlags(tty);
4595 }
4596
4597 // Apply CPU specific policy for the BiasedLocking
4598 if (UseBiasedLocking) {
4599 if (!VM_Version::use_biased_locking() &&
4600 !(FLAG_IS_CMDLINE(UseBiasedLocking))) {
4601 UseBiasedLocking = false;
4602 }
4603 }
4604 #ifdef COMPILER2
4605 if (!UseBiasedLocking || EmitSync != 0) {
4606 UseOptoBiasInlining = false;
4607 }
4608 #endif
4609
4610 return JNI_OK;
4611 }
4612
4613 jint Arguments::adjust_after_os() {
4614 if (UseNUMA) {
4615 if (UseParallelGC || UseParallelOldGC) {
4616 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) {
4617 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M);
4618 }
4619 }
4620 // UseNUMAInterleaving is set to ON for all collectors and
4621 // platforms when UseNUMA is set to ON. NUMA-aware collectors
4622 // such as the parallel collector for Linux and Solaris will
4623 // interleave old gen and survivor spaces on top of NUMA
4624 // allocation policy for the eden space.
4625 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on
4626 // all platforms and ParallelGC on Windows will interleave all
4627 // of the heap spaces across NUMA nodes.
4628 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) {
4629 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true);
4630 }
4631 }
4632 return JNI_OK;
4633 }
4634
4635 int Arguments::PropertyList_count(SystemProperty* pl) {
4636 int count = 0;
4637 while(pl != NULL) {
4638 count++;
4639 pl = pl->next();
4640 }
4641 return count;
4642 }
4643
4644 // Return the number of readable properties.
4645 int Arguments::PropertyList_readable_count(SystemProperty* pl) {
4646 int count = 0;
4647 while(pl != NULL) {
4648 if (pl->is_readable()) {
4649 count++;
4650 }
4651 pl = pl->next();
4652 }
4653 return count;
4654 }
4655
4656 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) {
4657 assert(key != NULL, "just checking");
4658 SystemProperty* prop;
4659 for (prop = pl; prop != NULL; prop = prop->next()) {
4660 if (strcmp(key, prop->key()) == 0) return prop->value();
4661 }
4662 return NULL;
4663 }
4664
4665 // Return the value of the requested property provided that it is a readable property.
4666 const char* Arguments::PropertyList_get_readable_value(SystemProperty *pl, const char* key) {
4667 assert(key != NULL, "just checking");
4668 SystemProperty* prop;
4669 // Return the property value if the keys match and the property is not internal or
4670 // it's the special internal property "jdk.boot.class.path.append".
4671 for (prop = pl; prop != NULL; prop = prop->next()) {
4672 if (strcmp(key, prop->key()) == 0) {
4673 if (!prop->internal()) {
4674 return prop->value();
4675 } else if (strcmp(key, "jdk.boot.class.path.append") == 0) {
4676 return prop->value();
4677 } else {
4678 // Property is internal and not jdk.boot.class.path.append so return NULL.
4679 return NULL;
4680 }
4681 }
4682 }
4683 return NULL;
4684 }
4685
4686 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) {
4687 int count = 0;
4688 const char* ret_val = NULL;
4689
4690 while(pl != NULL) {
4691 if(count >= index) {
4692 ret_val = pl->key();
4693 break;
4694 }
4695 count++;
4696 pl = pl->next();
4697 }
4698
4699 return ret_val;
4700 }
4701
4702 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) {
4703 int count = 0;
4704 char* ret_val = NULL;
4705
4706 while(pl != NULL) {
4707 if(count >= index) {
4708 ret_val = pl->value();
4709 break;
4710 }
4711 count++;
4712 pl = pl->next();
4713 }
4714
4715 return ret_val;
4716 }
4717
4718 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) {
4719 SystemProperty* p = *plist;
4720 if (p == NULL) {
4721 *plist = new_p;
4722 } else {
4723 while (p->next() != NULL) {
4724 p = p->next();
4725 }
4726 p->set_next(new_p);
4727 }
4728 }
4729
4730 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v,
4731 bool writeable, bool internal) {
4732 if (plist == NULL)
4733 return;
4734
4735 SystemProperty* new_p = new SystemProperty(k, v, writeable, internal);
4736 PropertyList_add(plist, new_p);
4737 }
4738
4739 void Arguments::PropertyList_add(SystemProperty *element) {
4740 PropertyList_add(&_system_properties, element);
4741 }
4742
4743 // This add maintains unique property key in the list.
4744 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v,
4745 PropertyAppendable append, PropertyWriteable writeable,
4746 PropertyInternal internal) {
4747 if (plist == NULL)
4748 return;
4749
4750 // If property key exist then update with new value.
4751 SystemProperty* prop;
4752 for (prop = *plist; prop != NULL; prop = prop->next()) {
4753 if (strcmp(k, prop->key()) == 0) {
4754 if (append == AppendProperty) {
4755 prop->append_value(v);
4756 } else {
4757 prop->set_value(v);
4758 }
4759 return;
4760 }
4761 }
4762
4763 PropertyList_add(plist, k, v, writeable == WriteableProperty, internal == InternalProperty);
4764 }
4765
4766 // Copies src into buf, replacing "%%" with "%" and "%p" with pid
4767 // Returns true if all of the source pointed by src has been copied over to
4768 // the destination buffer pointed by buf. Otherwise, returns false.
4769 // Notes:
4770 // 1. If the length (buflen) of the destination buffer excluding the
4771 // NULL terminator character is not long enough for holding the expanded
4772 // pid characters, it also returns false instead of returning the partially
4773 // expanded one.
4774 // 2. The passed in "buflen" should be large enough to hold the null terminator.
4775 bool Arguments::copy_expand_pid(const char* src, size_t srclen,
4776 char* buf, size_t buflen) {
4777 const char* p = src;
4778 char* b = buf;
4779 const char* src_end = &src[srclen];
4780 char* buf_end = &buf[buflen - 1];
4781
4782 while (p < src_end && b < buf_end) {
4783 if (*p == '%') {
4784 switch (*(++p)) {
4785 case '%': // "%%" ==> "%"
4786 *b++ = *p++;
4787 break;
4788 case 'p': { // "%p" ==> current process id
4789 // buf_end points to the character before the last character so
4790 // that we could write '\0' to the end of the buffer.
4791 size_t buf_sz = buf_end - b + 1;
4792 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id());
4793
4794 // if jio_snprintf fails or the buffer is not long enough to hold
4795 // the expanded pid, returns false.
4796 if (ret < 0 || ret >= (int)buf_sz) {
4797 return false;
4798 } else {
4799 b += ret;
4800 assert(*b == '\0', "fail in copy_expand_pid");
4801 if (p == src_end && b == buf_end + 1) {
4802 // reach the end of the buffer.
4803 return true;
4804 }
4805 }
4806 p++;
4807 break;
4808 }
4809 default :
4810 *b++ = '%';
4811 }
4812 } else {
4813 *b++ = *p++;
4814 }
4815 }
4816 *b = '\0';
4817 return (p == src_end); // return false if not all of the source was copied
4818 }