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 "classfile/classLoader.hpp"
27 #include "classfile/javaAssertions.hpp"
28 #include "classfile/moduleEntry.hpp"
29 #include "classfile/stringTable.hpp"
30 #include "classfile/symbolTable.hpp"
31 #include "gc/shared/gcArguments.hpp"
32 #include "gc/shared/genCollectedHeap.hpp"
33 #include "gc/shared/referenceProcessor.hpp"
34 #include "gc/shared/taskqueue.hpp"
35 #include "logging/log.hpp"
36 #include "logging/logConfiguration.hpp"
37 #include "logging/logStream.hpp"
38 #include "logging/logTag.hpp"
39 #include "memory/allocation.inline.hpp"
40 #include "memory/universe.inline.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "prims/jvm.h"
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
64 // Note: This is a special bug reporting site for the JVM
65 #define DEFAULT_VENDOR_URL_BUG "http://bugreport.java.com/bugreport/crash.jsp"
66 #define DEFAULT_JAVA_LAUNCHER "generic"
67
68 char* Arguments::_jvm_flags_file = NULL;
69 char** Arguments::_jvm_flags_array = NULL;
70 int Arguments::_num_jvm_flags = 0;
71 char** Arguments::_jvm_args_array = NULL;
72 int Arguments::_num_jvm_args = 0;
73 char* Arguments::_java_command = NULL;
74 SystemProperty* Arguments::_system_properties = NULL;
75 const char* Arguments::_gc_log_filename = NULL;
76 size_t Arguments::_conservative_max_heap_alignment = 0;
77 size_t Arguments::_min_heap_size = 0;
78 Arguments::Mode Arguments::_mode = _mixed;
79 bool Arguments::_java_compiler = false;
80 bool Arguments::_xdebug_mode = false;
81 const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG;
82 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER;
83 int Arguments::_sun_java_launcher_pid = -1;
84 bool Arguments::_sun_java_launcher_is_altjvm = false;
85
86 // These parameters are reset in method parse_vm_init_args()
87 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
88 bool Arguments::_UseOnStackReplacement = UseOnStackReplacement;
89 bool Arguments::_BackgroundCompilation = BackgroundCompilation;
90 bool Arguments::_ClipInlining = ClipInlining;
91 intx Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
92 intx Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
93
94 char* Arguments::SharedArchivePath = NULL;
95
96 AgentLibraryList Arguments::_libraryList;
97 AgentLibraryList Arguments::_agentList;
98
99 abort_hook_t Arguments::_abort_hook = NULL;
100 exit_hook_t Arguments::_exit_hook = NULL;
101 vfprintf_hook_t Arguments::_vfprintf_hook = NULL;
102
103
104 SystemProperty *Arguments::_sun_boot_library_path = NULL;
105 SystemProperty *Arguments::_java_library_path = NULL;
106 SystemProperty *Arguments::_java_home = NULL;
107 SystemProperty *Arguments::_java_class_path = NULL;
108 SystemProperty *Arguments::_jdk_boot_class_path_append = NULL;
109
110 GrowableArray<ModulePatchPath*> *Arguments::_patch_mod_prefix = NULL;
111 PathString *Arguments::_system_boot_class_path = NULL;
112 bool Arguments::_has_jimage = false;
113
114 char* Arguments::_ext_dirs = NULL;
115
116 // Check if head of 'option' matches 'name', and sets 'tail' to the remaining
117 // part of the option string.
118 static bool match_option(const JavaVMOption *option, const char* name,
119 const char** tail) {
120 size_t len = strlen(name);
121 if (strncmp(option->optionString, name, len) == 0) {
122 *tail = option->optionString + len;
123 return true;
124 } else {
125 return false;
126 }
127 }
128
129 // Check if 'option' matches 'name'. No "tail" is allowed.
130 static bool match_option(const JavaVMOption *option, const char* name) {
131 const char* tail = NULL;
132 bool result = match_option(option, name, &tail);
133 if (tail != NULL && *tail == '\0') {
134 return result;
135 } else {
136 return false;
137 }
138 }
139
140 // Return true if any of the strings in null-terminated array 'names' matches.
141 // If tail_allowed is true, then the tail must begin with a colon; otherwise,
142 // the option must match exactly.
143 static bool match_option(const JavaVMOption* option, const char** names, const char** tail,
144 bool tail_allowed) {
145 for (/* empty */; *names != NULL; ++names) {
146 if (match_option(option, *names, tail)) {
147 if (**tail == '\0' || (tail_allowed && **tail == ':')) {
148 return true;
149 }
150 }
151 }
152 return false;
153 }
154
155 static void logOption(const char* opt) {
156 if (PrintVMOptions) {
157 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt);
158 }
159 }
160
161 bool needs_module_property_warning = false;
162
163 #define MODULE_PROPERTY_PREFIX "jdk.module."
164 #define MODULE_PROPERTY_PREFIX_LEN 11
165 #define ADDEXPORTS "addexports"
166 #define ADDEXPORTS_LEN 10
167 #define ADDREADS "addreads"
168 #define ADDREADS_LEN 8
169 #define ADDOPENS "addopens"
170 #define ADDOPENS_LEN 8
171 #define PATCH "patch"
172 #define PATCH_LEN 5
173 #define ADDMODS "addmods"
174 #define ADDMODS_LEN 7
175 #define LIMITMODS "limitmods"
176 #define LIMITMODS_LEN 9
177 #define PATH "path"
178 #define PATH_LEN 4
179 #define UPGRADE_PATH "upgrade.path"
180 #define UPGRADE_PATH_LEN 12
181
182 // Return TRUE if option matches 'property', or 'property=', or 'property.'.
183 static bool matches_property_suffix(const char* option, const char* property, size_t len) {
184 return ((strncmp(option, property, len) == 0) &&
185 (option[len] == '=' || option[len] == '.' || option[len] == '\0'));
186 }
187
188 // Return true if property starts with "jdk.module." and its ensuing chars match
189 // any of the reserved module properties.
190 // property should be passed without the leading "-D".
191 bool Arguments::is_internal_module_property(const char* property) {
192 assert((strncmp(property, "-D", 2) != 0), "Unexpected leading -D");
193 if (strncmp(property, MODULE_PROPERTY_PREFIX, MODULE_PROPERTY_PREFIX_LEN) == 0) {
194 const char* property_suffix = property + MODULE_PROPERTY_PREFIX_LEN;
195 if (matches_property_suffix(property_suffix, ADDEXPORTS, ADDEXPORTS_LEN) ||
196 matches_property_suffix(property_suffix, ADDREADS, ADDREADS_LEN) ||
197 matches_property_suffix(property_suffix, ADDOPENS, ADDOPENS_LEN) ||
198 matches_property_suffix(property_suffix, PATCH, PATCH_LEN) ||
199 matches_property_suffix(property_suffix, ADDMODS, ADDMODS_LEN) ||
200 matches_property_suffix(property_suffix, LIMITMODS, LIMITMODS_LEN) ||
201 matches_property_suffix(property_suffix, PATH, PATH_LEN) ||
202 matches_property_suffix(property_suffix, UPGRADE_PATH, UPGRADE_PATH_LEN)) {
203 return true;
204 }
205 }
206 return false;
207 }
208
209 // Process java launcher properties.
210 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) {
211 // See if sun.java.launcher, sun.java.launcher.is_altjvm or
212 // sun.java.launcher.pid is defined.
213 // Must do this before setting up other system properties,
214 // as some of them may depend on launcher type.
215 for (int index = 0; index < args->nOptions; index++) {
216 const JavaVMOption* option = args->options + index;
217 const char* tail;
218
219 if (match_option(option, "-Dsun.java.launcher=", &tail)) {
220 process_java_launcher_argument(tail, option->extraInfo);
221 continue;
222 }
223 if (match_option(option, "-Dsun.java.launcher.is_altjvm=", &tail)) {
224 if (strcmp(tail, "true") == 0) {
225 _sun_java_launcher_is_altjvm = true;
226 }
227 continue;
228 }
229 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) {
230 _sun_java_launcher_pid = atoi(tail);
231 continue;
232 }
233 }
234 }
235
236 // Initialize system properties key and value.
237 void Arguments::init_system_properties() {
238
239 // Set up _system_boot_class_path which is not a property but
240 // relies heavily on argument processing and the jdk.boot.class.path.append
241 // property. It is used to store the underlying system boot class path.
242 _system_boot_class_path = new PathString(NULL);
243
244 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name",
245 "Java Virtual Machine Specification", false));
246 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false));
247 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false));
248 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true));
249 PropertyList_add(&_system_properties, new SystemProperty("jdk.debug", VM_Version::jdk_debug_level(), false));
250
251 // Following are JVMTI agent writable properties.
252 // Properties values are set to NULL and they are
253 // os specific they are initialized in os::init_system_properties_values().
254 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true);
255 _java_library_path = new SystemProperty("java.library.path", NULL, true);
256 _java_home = new SystemProperty("java.home", NULL, true);
257 _java_class_path = new SystemProperty("java.class.path", "", true);
258 // jdk.boot.class.path.append is a non-writeable, internal property.
259 // It can only be set by either:
260 // - -Xbootclasspath/a:
261 // - AddToBootstrapClassLoaderSearch during JVMTI OnLoad phase
262 _jdk_boot_class_path_append = new SystemProperty("jdk.boot.class.path.append", "", false, true);
263
264 // Add to System Property list.
265 PropertyList_add(&_system_properties, _sun_boot_library_path);
266 PropertyList_add(&_system_properties, _java_library_path);
267 PropertyList_add(&_system_properties, _java_home);
268 PropertyList_add(&_system_properties, _java_class_path);
269 PropertyList_add(&_system_properties, _jdk_boot_class_path_append);
270
271 // Set OS specific system properties values
272 os::init_system_properties_values();
273 }
274
275 // Update/Initialize System properties after JDK version number is known
276 void Arguments::init_version_specific_system_properties() {
277 enum { bufsz = 16 };
278 char buffer[bufsz];
279 const char* spec_vendor = "Oracle Corporation";
280 uint32_t spec_version = JDK_Version::current().major_version();
281
282 jio_snprintf(buffer, bufsz, UINT32_FORMAT, spec_version);
283
284 PropertyList_add(&_system_properties,
285 new SystemProperty("java.vm.specification.vendor", spec_vendor, false));
286 PropertyList_add(&_system_properties,
287 new SystemProperty("java.vm.specification.version", buffer, false));
288 PropertyList_add(&_system_properties,
289 new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false));
290 }
291
292 /*
293 * -XX argument processing:
294 *
295 * -XX arguments are defined in several places, such as:
296 * globals.hpp, globals_<cpu>.hpp, globals_<os>.hpp, <compiler>_globals.hpp, or <gc>_globals.hpp.
297 * -XX arguments are parsed in parse_argument().
298 * -XX argument bounds checking is done in check_vm_args_consistency().
299 *
300 * Over time -XX arguments may change. There are mechanisms to handle common cases:
301 *
302 * ALIASED: An option that is simply another name for another option. This is often
303 * part of the process of deprecating a flag, but not all aliases need
304 * to be deprecated.
305 *
306 * Create an alias for an option by adding the old and new option names to the
307 * "aliased_jvm_flags" table. Delete the old variable from globals.hpp (etc).
308 *
309 * DEPRECATED: An option that is supported, but a warning is printed to let the user know that
310 * support may be removed in the future. Both regular and aliased options may be
311 * deprecated.
312 *
313 * Add a deprecation warning for an option (or alias) by adding an entry in the
314 * "special_jvm_flags" table and setting the "deprecated_in" field.
315 * Often an option "deprecated" in one major release will
316 * be made "obsolete" in the next. In this case the entry should also have its
317 * "obsolete_in" field set.
318 *
319 * OBSOLETE: An option that has been removed (and deleted from globals.hpp), but is still accepted
320 * on the command line. A warning is printed to let the user know that option might not
321 * be accepted in the future.
322 *
323 * Add an obsolete warning for an option by adding an entry in the "special_jvm_flags"
324 * table and setting the "obsolete_in" field.
325 *
326 * EXPIRED: A deprecated or obsolete option that has an "accept_until" version less than or equal
327 * to the current JDK version. The system will flatly refuse to admit the existence of
328 * the flag. This allows a flag to die automatically over JDK releases.
329 *
330 * Note that manual cleanup of expired options should be done at major JDK version upgrades:
331 * - Newly expired options should be removed from the special_jvm_flags and aliased_jvm_flags tables.
332 * - Newly obsolete or expired deprecated options should have their global variable
333 * definitions removed (from globals.hpp, etc) and related implementations removed.
334 *
335 * Recommended approach for removing options:
336 *
337 * To remove options commonly used by customers (e.g. product, commercial -XX options), use
338 * the 3-step model adding major release numbers to the deprecate, obsolete and expire columns.
339 *
340 * To remove internal options (e.g. diagnostic, experimental, develop options), use
341 * a 2-step model adding major release numbers to the obsolete and expire columns.
342 *
343 * To change the name of an option, use the alias table as well as a 2-step
344 * model adding major release numbers to the deprecate and expire columns.
345 * Think twice about aliasing commonly used customer options.
346 *
347 * There are times when it is appropriate to leave a future release number as undefined.
348 *
349 * Tests: Aliases should be tested in VMAliasOptions.java.
350 * Deprecated options should be tested in VMDeprecatedOptions.java.
351 */
352
353 // The special_jvm_flags table declares options that are being deprecated and/or obsoleted. The
354 // "deprecated_in" or "obsolete_in" fields may be set to "undefined", but not both.
355 // When the JDK version reaches 'deprecated_in' limit, the JVM will process this flag on
356 // the command-line as usual, but will issue a warning.
357 // When the JDK version reaches 'obsolete_in' limit, the JVM will continue accepting this flag on
358 // the command-line, while issuing a warning and ignoring the flag value.
359 // Once the JDK version reaches 'expired_in' limit, the JVM will flatly refuse to admit the
360 // existence of the flag.
361 //
362 // MANUAL CLEANUP ON JDK VERSION UPDATES:
363 // This table ensures that the handling of options will update automatically when the JDK
364 // version is incremented, but the source code needs to be cleanup up manually:
365 // - As "deprecated" options age into "obsolete" or "expired" options, the associated "globals"
366 // variable should be removed, as well as users of the variable.
367 // - As "deprecated" options age into "obsolete" options, move the entry into the
368 // "Obsolete Flags" section of the table.
369 // - All expired options should be removed from the table.
370 static SpecialFlag const special_jvm_flags[] = {
371 // -------------- Deprecated Flags --------------
372 // --- Non-alias flags - sorted by obsolete_in then expired_in:
373 { "MaxGCMinorPauseMillis", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() },
374 { "UseConcMarkSweepGC", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
375 { "AssumeMP", JDK_Version::jdk(10),JDK_Version::undefined(), JDK_Version::undefined() },
376 { "MonitorInUseLists", JDK_Version::jdk(10),JDK_Version::undefined(), JDK_Version::undefined() },
377 { "MaxRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
378 { "MinRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
379 { "InitialRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
380
381 // --- Deprecated alias flags (see also aliased_jvm_flags) - sorted by obsolete_in then expired_in:
382 { "DefaultMaxRAMFraction", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() },
383 { "CreateMinidumpOnCrash", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
384 { "MustCallLoadClassInternal", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
385 { "UnsyncloadClass", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
386
387 // -------------- Obsolete Flags - sorted by expired_in --------------
388 { "ConvertSleepToYield", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) },
389 { "ConvertYieldToSleep", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) },
390 { "MinSleepInterval", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) },
391 { "PermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::undefined() },
392 { "MaxPermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::undefined() },
393
394 #ifdef TEST_VERIFY_SPECIAL_JVM_FLAGS
395 { "dep > obs", JDK_Version::jdk(9), JDK_Version::jdk(8), JDK_Version::undefined() },
396 { "dep > exp ", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(8) },
397 { "obs > exp ", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(8) },
398 { "not deprecated or obsolete", JDK_Version::undefined(), JDK_Version::undefined(), JDK_Version::jdk(9) },
399 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
400 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
401 { "BytecodeVerificationRemote", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::undefined() },
402 #endif
403
404 { NULL, JDK_Version(0), JDK_Version(0) }
405 };
406
407 // Flags that are aliases for other flags.
408 typedef struct {
409 const char* alias_name;
410 const char* real_name;
411 } AliasedFlag;
412
413 static AliasedFlag const aliased_jvm_flags[] = {
414 { "DefaultMaxRAMFraction", "MaxRAMFraction" },
415 { "CreateMinidumpOnCrash", "CreateCoredumpOnCrash" },
416 { NULL, NULL}
417 };
418
419 // NOTE: A compatibility request will be necessary for each alias to be removed.
420 static AliasedLoggingFlag const aliased_logging_flags[] = {
421 { "PrintCompressedOopsMode", LogLevel::Info, true, LOG_TAGS(gc, heap, coops) },
422 { "PrintSharedSpaces", LogLevel::Info, true, LOG_TAGS(cds) },
423 { "TraceBiasedLocking", LogLevel::Info, true, LOG_TAGS(biasedlocking) },
424 { "TraceClassLoading", LogLevel::Info, true, LOG_TAGS(class, load) },
425 { "TraceClassLoadingPreorder", LogLevel::Debug, true, LOG_TAGS(class, preorder) },
426 { "TraceClassPaths", LogLevel::Info, true, LOG_TAGS(class, path) },
427 { "TraceClassResolution", LogLevel::Debug, true, LOG_TAGS(class, resolve) },
428 { "TraceClassUnloading", LogLevel::Info, true, LOG_TAGS(class, unload) },
429 { "TraceExceptions", LogLevel::Info, true, LOG_TAGS(exceptions) },
430 { "TraceLoaderConstraints", LogLevel::Info, true, LOG_TAGS(class, loader, constraints) },
431 { "TraceMonitorInflation", LogLevel::Debug, true, LOG_TAGS(monitorinflation) },
432 { "TraceSafepointCleanupTime", LogLevel::Info, true, LOG_TAGS(safepoint, cleanup) },
433 { "TraceJVMTIObjectTagging", LogLevel::Debug, true, LOG_TAGS(jvmti, objecttagging) },
434 { "TraceRedefineClasses", LogLevel::Info, false, LOG_TAGS(redefine, class) },
435 { NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG) }
436 };
437
438 #ifndef PRODUCT
439 // These options are removed in jdk9. Remove this code for jdk10.
440 static AliasedFlag const removed_develop_logging_flags[] = {
441 { "TraceClassInitialization", "-Xlog:class+init" },
442 { "TraceClassLoaderData", "-Xlog:class+loader+data" },
443 { "TraceDefaultMethods", "-Xlog:defaultmethods=debug" },
444 { "TraceItables", "-Xlog:itables=debug" },
445 { "TraceMonitorMismatch", "-Xlog:monitormismatch=info" },
446 { "TraceSafepoint", "-Xlog:safepoint=debug" },
447 { "TraceStartupTime", "-Xlog:startuptime" },
448 { "TraceVMOperation", "-Xlog:vmoperation=debug" },
449 { "PrintVtables", "-Xlog:vtables=debug" },
450 { "VerboseVerification", "-Xlog:verification" },
451 { NULL, NULL }
452 };
453 #endif //PRODUCT
454
455 // Return true if "v" is less than "other", where "other" may be "undefined".
456 static bool version_less_than(JDK_Version v, JDK_Version other) {
457 assert(!v.is_undefined(), "must be defined");
458 if (!other.is_undefined() && v.compare(other) >= 0) {
459 return false;
460 } else {
461 return true;
462 }
463 }
464
465 extern bool lookup_special_flag_ext(const char *flag_name, SpecialFlag& flag);
466
467 static bool lookup_special_flag(const char *flag_name, SpecialFlag& flag) {
468 // Allow extensions to have priority
469 if (lookup_special_flag_ext(flag_name, flag)) {
470 return true;
471 }
472
473 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
474 if ((strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
475 flag = special_jvm_flags[i];
476 return true;
477 }
478 }
479 return false;
480 }
481
482 bool Arguments::is_obsolete_flag(const char *flag_name, JDK_Version* version) {
483 assert(version != NULL, "Must provide a version buffer");
484 SpecialFlag flag;
485 if (lookup_special_flag(flag_name, flag)) {
486 if (!flag.obsolete_in.is_undefined()) {
487 if (version_less_than(JDK_Version::current(), flag.expired_in)) {
488 *version = flag.obsolete_in;
489 return true;
490 }
491 }
492 }
493 return false;
494 }
495
496 int Arguments::is_deprecated_flag(const char *flag_name, JDK_Version* version) {
497 assert(version != NULL, "Must provide a version buffer");
498 SpecialFlag flag;
499 if (lookup_special_flag(flag_name, flag)) {
500 if (!flag.deprecated_in.is_undefined()) {
501 if (version_less_than(JDK_Version::current(), flag.obsolete_in) &&
502 version_less_than(JDK_Version::current(), flag.expired_in)) {
503 *version = flag.deprecated_in;
504 return 1;
505 } else {
506 return -1;
507 }
508 }
509 }
510 return 0;
511 }
512
513 #ifndef PRODUCT
514 const char* Arguments::removed_develop_logging_flag_name(const char* name){
515 for (size_t i = 0; removed_develop_logging_flags[i].alias_name != NULL; i++) {
516 const AliasedFlag& flag = removed_develop_logging_flags[i];
517 if (strcmp(flag.alias_name, name) == 0) {
518 return flag.real_name;
519 }
520 }
521 return NULL;
522 }
523 #endif // PRODUCT
524
525 const char* Arguments::real_flag_name(const char *flag_name) {
526 for (size_t i = 0; aliased_jvm_flags[i].alias_name != NULL; i++) {
527 const AliasedFlag& flag_status = aliased_jvm_flags[i];
528 if (strcmp(flag_status.alias_name, flag_name) == 0) {
529 return flag_status.real_name;
530 }
531 }
532 return flag_name;
533 }
534
535 #ifdef ASSERT
536 static bool lookup_special_flag(const char *flag_name, size_t skip_index) {
537 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
538 if ((i != skip_index) && (strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
539 return true;
540 }
541 }
542 return false;
543 }
544
545 static bool verify_special_jvm_flags() {
546 bool success = true;
547 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
548 const SpecialFlag& flag = special_jvm_flags[i];
549 if (lookup_special_flag(flag.name, i)) {
550 warning("Duplicate special flag declaration \"%s\"", flag.name);
551 success = false;
552 }
553 if (flag.deprecated_in.is_undefined() &&
554 flag.obsolete_in.is_undefined()) {
555 warning("Special flag entry \"%s\" must declare version deprecated and/or obsoleted in.", flag.name);
556 success = false;
557 }
558
559 if (!flag.deprecated_in.is_undefined()) {
560 if (!version_less_than(flag.deprecated_in, flag.obsolete_in)) {
561 warning("Special flag entry \"%s\" must be deprecated before obsoleted.", flag.name);
562 success = false;
563 }
564
565 if (!version_less_than(flag.deprecated_in, flag.expired_in)) {
566 warning("Special flag entry \"%s\" must be deprecated before expired.", flag.name);
567 success = false;
568 }
569 }
570
571 if (!flag.obsolete_in.is_undefined()) {
572 if (!version_less_than(flag.obsolete_in, flag.expired_in)) {
573 warning("Special flag entry \"%s\" must be obsoleted before expired.", flag.name);
574 success = false;
575 }
576
577 // if flag has become obsolete it should not have a "globals" flag defined anymore.
578 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) {
579 if (Flag::find_flag(flag.name) != NULL) {
580 warning("Global variable for obsolete special flag entry \"%s\" should be removed", flag.name);
581 success = false;
582 }
583 }
584 }
585
586 if (!flag.expired_in.is_undefined()) {
587 // if flag has become expired it should not have a "globals" flag defined anymore.
588 if (!version_less_than(JDK_Version::current(), flag.expired_in)) {
589 if (Flag::find_flag(flag.name) != NULL) {
590 warning("Global variable for expired flag entry \"%s\" should be removed", flag.name);
591 success = false;
592 }
593 }
594 }
595
596 }
597 return success;
598 }
599 #endif
600
601 // Parses a size specification string.
602 bool Arguments::atojulong(const char *s, julong* result) {
603 julong n = 0;
604
605 // First char must be a digit. Don't allow negative numbers or leading spaces.
606 if (!isdigit(*s)) {
607 return false;
608 }
609
610 bool is_hex = (s[0] == '0' && (s[1] == 'x' || s[1] == 'X'));
611 char* remainder;
612 errno = 0;
613 n = strtoull(s, &remainder, (is_hex ? 16 : 10));
614 if (errno != 0) {
615 return false;
616 }
617
618 // Fail if no number was read at all or if the remainder contains more than a single non-digit character.
619 if (remainder == s || strlen(remainder) > 1) {
620 return false;
621 }
622
623 switch (*remainder) {
624 case 'T': case 't':
625 *result = n * G * K;
626 // Check for overflow.
627 if (*result/((julong)G * K) != n) return false;
628 return true;
629 case 'G': case 'g':
630 *result = n * G;
631 if (*result/G != n) return false;
632 return true;
633 case 'M': case 'm':
634 *result = n * M;
635 if (*result/M != n) return false;
636 return true;
637 case 'K': case 'k':
638 *result = n * K;
639 if (*result/K != n) return false;
640 return true;
641 case '\0':
642 *result = n;
643 return true;
644 default:
645 return false;
646 }
647 }
648
649 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size, julong max_size) {
650 if (size < min_size) return arg_too_small;
651 if (size > max_size) return arg_too_big;
652 return arg_in_range;
653 }
654
655 // Describe an argument out of range error
656 void Arguments::describe_range_error(ArgsRange errcode) {
657 switch(errcode) {
658 case arg_too_big:
659 jio_fprintf(defaultStream::error_stream(),
660 "The specified size exceeds the maximum "
661 "representable size.\n");
662 break;
663 case arg_too_small:
664 case arg_unreadable:
665 case arg_in_range:
666 // do nothing for now
667 break;
668 default:
669 ShouldNotReachHere();
670 }
671 }
672
673 static bool set_bool_flag(const char* name, bool value, Flag::Flags origin) {
674 if (CommandLineFlags::boolAtPut(name, &value, origin) == Flag::SUCCESS) {
675 return true;
676 } else {
677 return false;
678 }
679 }
680
681 static bool set_fp_numeric_flag(const char* name, char* value, Flag::Flags origin) {
682 char* end;
683 errno = 0;
684 double v = strtod(value, &end);
685 if ((errno != 0) || (*end != 0)) {
686 return false;
687 }
688
689 if (CommandLineFlags::doubleAtPut(name, &v, origin) == Flag::SUCCESS) {
690 return true;
691 }
692 return false;
693 }
694
695 static bool set_numeric_flag(const char* name, char* value, Flag::Flags origin) {
696 julong v;
697 int int_v;
698 intx intx_v;
699 bool is_neg = false;
700 Flag* result = Flag::find_flag(name, strlen(name));
701
702 if (result == NULL) {
703 return false;
704 }
705
706 // Check the sign first since atojulong() parses only unsigned values.
707 if (*value == '-') {
708 if (!result->is_intx() && !result->is_int()) {
709 return false;
710 }
711 value++;
712 is_neg = true;
713 }
714 if (!Arguments::atojulong(value, &v)) {
715 return false;
716 }
717 if (result->is_int()) {
718 int_v = (int) v;
719 if (is_neg) {
720 int_v = -int_v;
721 }
722 return CommandLineFlags::intAtPut(result, &int_v, origin) == Flag::SUCCESS;
723 } else if (result->is_uint()) {
724 uint uint_v = (uint) v;
725 return CommandLineFlags::uintAtPut(result, &uint_v, origin) == Flag::SUCCESS;
726 } else if (result->is_intx()) {
727 intx_v = (intx) v;
728 if (is_neg) {
729 intx_v = -intx_v;
730 }
731 return CommandLineFlags::intxAtPut(result, &intx_v, origin) == Flag::SUCCESS;
732 } else if (result->is_uintx()) {
733 uintx uintx_v = (uintx) v;
734 return CommandLineFlags::uintxAtPut(result, &uintx_v, origin) == Flag::SUCCESS;
735 } else if (result->is_uint64_t()) {
736 uint64_t uint64_t_v = (uint64_t) v;
737 return CommandLineFlags::uint64_tAtPut(result, &uint64_t_v, origin) == Flag::SUCCESS;
738 } else if (result->is_size_t()) {
739 size_t size_t_v = (size_t) v;
740 return CommandLineFlags::size_tAtPut(result, &size_t_v, origin) == Flag::SUCCESS;
741 } else if (result->is_double()) {
742 double double_v = (double) v;
743 return CommandLineFlags::doubleAtPut(result, &double_v, origin) == Flag::SUCCESS;
744 } else {
745 return false;
746 }
747 }
748
749 static bool set_string_flag(const char* name, const char* value, Flag::Flags origin) {
750 if (CommandLineFlags::ccstrAtPut(name, &value, origin) != Flag::SUCCESS) return false;
751 // Contract: CommandLineFlags always returns a pointer that needs freeing.
752 FREE_C_HEAP_ARRAY(char, value);
753 return true;
754 }
755
756 static bool append_to_string_flag(const char* name, const char* new_value, Flag::Flags origin) {
757 const char* old_value = "";
758 if (CommandLineFlags::ccstrAt(name, &old_value) != Flag::SUCCESS) return false;
759 size_t old_len = old_value != NULL ? strlen(old_value) : 0;
760 size_t new_len = strlen(new_value);
761 const char* value;
762 char* free_this_too = NULL;
763 if (old_len == 0) {
764 value = new_value;
765 } else if (new_len == 0) {
766 value = old_value;
767 } else {
768 size_t length = old_len + 1 + new_len + 1;
769 char* buf = NEW_C_HEAP_ARRAY(char, length, mtArguments);
770 // each new setting adds another LINE to the switch:
771 jio_snprintf(buf, length, "%s\n%s", old_value, new_value);
772 value = buf;
773 free_this_too = buf;
774 }
775 (void) CommandLineFlags::ccstrAtPut(name, &value, origin);
776 // CommandLineFlags always returns a pointer that needs freeing.
777 FREE_C_HEAP_ARRAY(char, value);
778 if (free_this_too != NULL) {
779 // CommandLineFlags made its own copy, so I must delete my own temp. buffer.
780 FREE_C_HEAP_ARRAY(char, free_this_too);
781 }
782 return true;
783 }
784
785 const char* Arguments::handle_aliases_and_deprecation(const char* arg, bool warn) {
786 const char* real_name = real_flag_name(arg);
787 JDK_Version since = JDK_Version();
788 switch (is_deprecated_flag(arg, &since)) {
789 case -1:
790 return NULL; // obsolete or expired, don't process normally
791 case 0:
792 return real_name;
793 case 1: {
794 if (warn) {
795 char version[256];
796 since.to_string(version, sizeof(version));
797 if (real_name != arg) {
798 warning("Option %s was deprecated in version %s and will likely be removed in a future release. Use option %s instead.",
799 arg, version, real_name);
800 } else {
801 warning("Option %s was deprecated in version %s and will likely be removed in a future release.",
802 arg, version);
803 }
804 }
805 return real_name;
806 }
807 }
808 ShouldNotReachHere();
809 return NULL;
810 }
811
812 void log_deprecated_flag(const char* name, bool on, AliasedLoggingFlag alf) {
813 LogTagType tagSet[] = {alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5};
814 // Set tagset string buffer at max size of 256, large enough for any alias tagset
815 const int max_tagset_size = 256;
816 int max_tagset_len = max_tagset_size - 1;
817 char tagset_buffer[max_tagset_size];
818 tagset_buffer[0] = '\0';
819
820 // Write tag-set for aliased logging option, in string list form
821 int max_tags = sizeof(tagSet)/sizeof(tagSet[0]);
822 for (int i = 0; i < max_tags && tagSet[i] != LogTag::__NO_TAG; i++) {
823 if (i > 0) {
824 strncat(tagset_buffer, "+", max_tagset_len - strlen(tagset_buffer));
825 }
826 strncat(tagset_buffer, LogTag::name(tagSet[i]), max_tagset_len - strlen(tagset_buffer));
827 }
828 if (!alf.exactMatch) {
829 strncat(tagset_buffer, "*", max_tagset_len - strlen(tagset_buffer));
830 }
831 log_warning(arguments)("-XX:%s%s is deprecated. Will use -Xlog:%s=%s instead.",
832 (on) ? "+" : "-",
833 name,
834 tagset_buffer,
835 (on) ? LogLevel::name(alf.level) : "off");
836 }
837
838 AliasedLoggingFlag Arguments::catch_logging_aliases(const char* name, bool on){
839 for (size_t i = 0; aliased_logging_flags[i].alias_name != NULL; i++) {
840 const AliasedLoggingFlag& alf = aliased_logging_flags[i];
841 if (strcmp(alf.alias_name, name) == 0) {
842 log_deprecated_flag(name, on, alf);
843 return alf;
844 }
845 }
846 AliasedLoggingFlag a = {NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG)};
847 return a;
848 }
849
850 bool Arguments::parse_argument(const char* arg, Flag::Flags origin) {
851
852 // range of acceptable characters spelled out for portability reasons
853 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]"
854 #define BUFLEN 255
855 char name[BUFLEN+1];
856 char dummy;
857 const char* real_name;
858 bool warn_if_deprecated = true;
859
860 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
861 AliasedLoggingFlag alf = catch_logging_aliases(name, false);
862 if (alf.alias_name != NULL){
863 LogConfiguration::configure_stdout(LogLevel::Off, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
864 return true;
865 }
866 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
867 if (real_name == NULL) {
868 return false;
869 }
870 return set_bool_flag(real_name, false, origin);
871 }
872 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
873 AliasedLoggingFlag alf = catch_logging_aliases(name, true);
874 if (alf.alias_name != NULL){
875 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
876 return true;
877 }
878 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
879 if (real_name == NULL) {
880 return false;
881 }
882 return set_bool_flag(real_name, true, origin);
883 }
884
885 char punct;
886 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') {
887 const char* value = strchr(arg, '=') + 1;
888 Flag* flag;
889
890 // this scanf pattern matches both strings (handled here) and numbers (handled later))
891 AliasedLoggingFlag alf = catch_logging_aliases(name, true);
892 if (alf.alias_name != NULL) {
893 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
894 return true;
895 }
896 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
897 if (real_name == NULL) {
898 return false;
899 }
900 flag = Flag::find_flag(real_name);
901 if (flag != NULL && flag->is_ccstr()) {
902 if (flag->ccstr_accumulates()) {
903 return append_to_string_flag(real_name, value, origin);
904 } else {
905 if (value[0] == '\0') {
906 value = NULL;
907 }
908 return set_string_flag(real_name, value, origin);
909 }
910 } else {
911 warn_if_deprecated = false; // if arg is deprecated, we've already done warning...
912 }
913 }
914
915 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') {
916 const char* value = strchr(arg, '=') + 1;
917 // -XX:Foo:=xxx will reset the string flag to the given value.
918 if (value[0] == '\0') {
919 value = NULL;
920 }
921 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
922 if (real_name == NULL) {
923 return false;
924 }
925 return set_string_flag(real_name, value, origin);
926 }
927
928 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.eE+]"
929 #define SIGNED_NUMBER_RANGE "[-0123456789]"
930 #define NUMBER_RANGE "[0123456789eE+-]"
931 char value[BUFLEN + 1];
932 char value2[BUFLEN + 1];
933 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) {
934 // Looks like a floating-point number -- try again with more lenient format string
935 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) {
936 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
937 if (real_name == NULL) {
938 return false;
939 }
940 return set_fp_numeric_flag(real_name, value, origin);
941 }
942 }
943
944 #define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]"
945 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) {
946 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
947 if (real_name == NULL) {
948 return false;
949 }
950 return set_numeric_flag(real_name, value, origin);
951 }
952
953 return false;
954 }
955
956 void Arguments::add_string(char*** bldarray, int* count, const char* arg) {
957 assert(bldarray != NULL, "illegal argument");
958
959 if (arg == NULL) {
960 return;
961 }
962
963 int new_count = *count + 1;
964
965 // expand the array and add arg to the last element
966 if (*bldarray == NULL) {
967 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtArguments);
968 } else {
969 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtArguments);
970 }
971 (*bldarray)[*count] = os::strdup_check_oom(arg);
972 *count = new_count;
973 }
974
975 void Arguments::build_jvm_args(const char* arg) {
976 add_string(&_jvm_args_array, &_num_jvm_args, arg);
977 }
978
979 void Arguments::build_jvm_flags(const char* arg) {
980 add_string(&_jvm_flags_array, &_num_jvm_flags, arg);
981 }
982
983 // utility function to return a string that concatenates all
984 // strings in a given char** array
985 const char* Arguments::build_resource_string(char** args, int count) {
986 if (args == NULL || count == 0) {
987 return NULL;
988 }
989 size_t length = 0;
990 for (int i = 0; i < count; i++) {
991 length += strlen(args[i]) + 1; // add 1 for a space or NULL terminating character
992 }
993 char* s = NEW_RESOURCE_ARRAY(char, length);
994 char* dst = s;
995 for (int j = 0; j < count; j++) {
996 size_t offset = strlen(args[j]) + 1; // add 1 for a space or NULL terminating character
997 jio_snprintf(dst, length, "%s ", args[j]); // jio_snprintf will replace the last space character with NULL character
998 dst += offset;
999 length -= offset;
1000 }
1001 return (const char*) s;
1002 }
1003
1004 void Arguments::print_on(outputStream* st) {
1005 st->print_cr("VM Arguments:");
1006 if (num_jvm_flags() > 0) {
1007 st->print("jvm_flags: "); print_jvm_flags_on(st);
1008 st->cr();
1009 }
1010 if (num_jvm_args() > 0) {
1011 st->print("jvm_args: "); print_jvm_args_on(st);
1012 st->cr();
1013 }
1014 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>");
1015 if (_java_class_path != NULL) {
1016 char* path = _java_class_path->value();
1017 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path );
1018 }
1019 st->print_cr("Launcher Type: %s", _sun_java_launcher);
1020 }
1021
1022 void Arguments::print_summary_on(outputStream* st) {
1023 // Print the command line. Environment variables that are helpful for
1024 // reproducing the problem are written later in the hs_err file.
1025 // flags are from setting file
1026 if (num_jvm_flags() > 0) {
1027 st->print_raw("Settings File: ");
1028 print_jvm_flags_on(st);
1029 st->cr();
1030 }
1031 // args are the command line and environment variable arguments.
1032 st->print_raw("Command Line: ");
1033 if (num_jvm_args() > 0) {
1034 print_jvm_args_on(st);
1035 }
1036 // this is the classfile and any arguments to the java program
1037 if (java_command() != NULL) {
1038 st->print("%s", java_command());
1039 }
1040 st->cr();
1041 }
1042
1043 void Arguments::print_jvm_flags_on(outputStream* st) {
1044 if (_num_jvm_flags > 0) {
1045 for (int i=0; i < _num_jvm_flags; i++) {
1046 st->print("%s ", _jvm_flags_array[i]);
1047 }
1048 }
1049 }
1050
1051 void Arguments::print_jvm_args_on(outputStream* st) {
1052 if (_num_jvm_args > 0) {
1053 for (int i=0; i < _num_jvm_args; i++) {
1054 st->print("%s ", _jvm_args_array[i]);
1055 }
1056 }
1057 }
1058
1059 bool Arguments::process_argument(const char* arg,
1060 jboolean ignore_unrecognized,
1061 Flag::Flags origin) {
1062 JDK_Version since = JDK_Version();
1063
1064 if (parse_argument(arg, origin)) {
1065 return true;
1066 }
1067
1068 // Determine if the flag has '+', '-', or '=' characters.
1069 bool has_plus_minus = (*arg == '+' || *arg == '-');
1070 const char* const argname = has_plus_minus ? arg + 1 : arg;
1071
1072 size_t arg_len;
1073 const char* equal_sign = strchr(argname, '=');
1074 if (equal_sign == NULL) {
1075 arg_len = strlen(argname);
1076 } else {
1077 arg_len = equal_sign - argname;
1078 }
1079
1080 // Only make the obsolete check for valid arguments.
1081 if (arg_len <= BUFLEN) {
1082 // Construct a string which consists only of the argument name without '+', '-', or '='.
1083 char stripped_argname[BUFLEN+1]; // +1 for '\0'
1084 jio_snprintf(stripped_argname, arg_len+1, "%s", argname); // +1 for '\0'
1085 if (is_obsolete_flag(stripped_argname, &since)) {
1086 char version[256];
1087 since.to_string(version, sizeof(version));
1088 warning("Ignoring option %s; support was removed in %s", stripped_argname, version);
1089 return true;
1090 }
1091 #ifndef PRODUCT
1092 else {
1093 const char* replacement;
1094 if ((replacement = removed_develop_logging_flag_name(stripped_argname)) != NULL){
1095 log_warning(arguments)("%s has been removed. Please use %s instead.",
1096 stripped_argname,
1097 replacement);
1098 return false;
1099 }
1100 }
1101 #endif //PRODUCT
1102 }
1103
1104 // For locked flags, report a custom error message if available.
1105 // Otherwise, report the standard unrecognized VM option.
1106 Flag* found_flag = Flag::find_flag((const char*)argname, arg_len, true, true);
1107 if (found_flag != NULL) {
1108 char locked_message_buf[BUFLEN];
1109 Flag::MsgType msg_type = found_flag->get_locked_message(locked_message_buf, BUFLEN);
1110 if (strlen(locked_message_buf) == 0) {
1111 if (found_flag->is_bool() && !has_plus_minus) {
1112 jio_fprintf(defaultStream::error_stream(),
1113 "Missing +/- setting for VM option '%s'\n", argname);
1114 } else if (!found_flag->is_bool() && has_plus_minus) {
1115 jio_fprintf(defaultStream::error_stream(),
1116 "Unexpected +/- setting in VM option '%s'\n", argname);
1117 } else {
1118 jio_fprintf(defaultStream::error_stream(),
1119 "Improperly specified VM option '%s'\n", argname);
1120 }
1121 } else {
1122 #ifdef PRODUCT
1123 bool mismatched = ((msg_type == Flag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD) ||
1124 (msg_type == Flag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD));
1125 if (ignore_unrecognized && mismatched) {
1126 return true;
1127 }
1128 #endif
1129 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf);
1130 }
1131 } else {
1132 if (ignore_unrecognized) {
1133 return true;
1134 }
1135 jio_fprintf(defaultStream::error_stream(),
1136 "Unrecognized VM option '%s'\n", argname);
1137 Flag* fuzzy_matched = Flag::fuzzy_match((const char*)argname, arg_len, true);
1138 if (fuzzy_matched != NULL) {
1139 jio_fprintf(defaultStream::error_stream(),
1140 "Did you mean '%s%s%s'? ",
1141 (fuzzy_matched->is_bool()) ? "(+/-)" : "",
1142 fuzzy_matched->_name,
1143 (fuzzy_matched->is_bool()) ? "" : "=<value>");
1144 }
1145 }
1146
1147 // allow for commandline "commenting out" options like -XX:#+Verbose
1148 return arg[0] == '#';
1149 }
1150
1151 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) {
1152 FILE* stream = fopen(file_name, "rb");
1153 if (stream == NULL) {
1154 if (should_exist) {
1155 jio_fprintf(defaultStream::error_stream(),
1156 "Could not open settings file %s\n", file_name);
1157 return false;
1158 } else {
1159 return true;
1160 }
1161 }
1162
1163 char token[1024];
1164 int pos = 0;
1165
1166 bool in_white_space = true;
1167 bool in_comment = false;
1168 bool in_quote = false;
1169 char quote_c = 0;
1170 bool result = true;
1171
1172 int c = getc(stream);
1173 while(c != EOF && pos < (int)(sizeof(token)-1)) {
1174 if (in_white_space) {
1175 if (in_comment) {
1176 if (c == '\n') in_comment = false;
1177 } else {
1178 if (c == '#') in_comment = true;
1179 else if (!isspace(c)) {
1180 in_white_space = false;
1181 token[pos++] = c;
1182 }
1183 }
1184 } else {
1185 if (c == '\n' || (!in_quote && isspace(c))) {
1186 // token ends at newline, or at unquoted whitespace
1187 // this allows a way to include spaces in string-valued options
1188 token[pos] = '\0';
1189 logOption(token);
1190 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
1191 build_jvm_flags(token);
1192 pos = 0;
1193 in_white_space = true;
1194 in_quote = false;
1195 } else if (!in_quote && (c == '\'' || c == '"')) {
1196 in_quote = true;
1197 quote_c = c;
1198 } else if (in_quote && (c == quote_c)) {
1199 in_quote = false;
1200 } else {
1201 token[pos++] = c;
1202 }
1203 }
1204 c = getc(stream);
1205 }
1206 if (pos > 0) {
1207 token[pos] = '\0';
1208 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
1209 build_jvm_flags(token);
1210 }
1211 fclose(stream);
1212 return result;
1213 }
1214
1215 //=============================================================================================================
1216 // Parsing of properties (-D)
1217
1218 const char* Arguments::get_property(const char* key) {
1219 return PropertyList_get_value(system_properties(), key);
1220 }
1221
1222 bool Arguments::add_property(const char* prop, PropertyWriteable writeable, PropertyInternal internal) {
1223 const char* eq = strchr(prop, '=');
1224 const char* key;
1225 const char* value = "";
1226
1227 if (eq == NULL) {
1228 // property doesn't have a value, thus use passed string
1229 key = prop;
1230 } else {
1231 // property have a value, thus extract it and save to the
1232 // allocated string
1233 size_t key_len = eq - prop;
1234 char* tmp_key = AllocateHeap(key_len + 1, mtArguments);
1235
1236 jio_snprintf(tmp_key, key_len + 1, "%s", prop);
1237 key = tmp_key;
1238
1239 value = &prop[key_len + 1];
1240 }
1241
1242 if (strcmp(key, "java.compiler") == 0) {
1243 process_java_compiler_argument(value);
1244 // Record value in Arguments, but let it get passed to Java.
1245 } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 ||
1246 strcmp(key, "sun.java.launcher.pid") == 0) {
1247 // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are
1248 // private and are processed in process_sun_java_launcher_properties();
1249 // the sun.java.launcher property is passed on to the java application
1250 } else if (strcmp(key, "sun.boot.library.path") == 0) {
1251 // append is true, writable is true, internal is false
1252 PropertyList_unique_add(&_system_properties, key, value, AppendProperty,
1253 WriteableProperty, ExternalProperty);
1254 } else {
1255 if (strcmp(key, "sun.java.command") == 0) {
1256 char *old_java_command = _java_command;
1257 _java_command = os::strdup_check_oom(value, mtArguments);
1258 if (old_java_command != NULL) {
1259 os::free(old_java_command);
1260 }
1261 } else if (strcmp(key, "java.vendor.url.bug") == 0) {
1262 const char* old_java_vendor_url_bug = _java_vendor_url_bug;
1263 // save it in _java_vendor_url_bug, so JVM fatal error handler can access
1264 // its value without going through the property list or making a Java call.
1265 _java_vendor_url_bug = os::strdup_check_oom(value, mtArguments);
1266 if (old_java_vendor_url_bug != DEFAULT_VENDOR_URL_BUG) {
1267 assert(old_java_vendor_url_bug != NULL, "_java_vendor_url_bug is NULL");
1268 os::free((void *)old_java_vendor_url_bug);
1269 }
1270 }
1271
1272 // Create new property and add at the end of the list
1273 PropertyList_unique_add(&_system_properties, key, value, AddProperty, writeable, internal);
1274 }
1275
1276 if (key != prop) {
1277 // SystemProperty copy passed value, thus free previously allocated
1278 // memory
1279 FreeHeap((void *)key);
1280 }
1281
1282 return true;
1283 }
1284
1285 #if INCLUDE_CDS
1286 void Arguments::check_unsupported_dumping_properties() {
1287 assert(DumpSharedSpaces, "this function is only used with -Xshare:dump");
1288 const char* unsupported_properties[] = { "jdk.module.main",
1289 "jdk.module.limitmods",
1290 "jdk.module.path",
1291 "jdk.module.upgrade.path",
1292 "jdk.module.patch.0" };
1293 const char* unsupported_options[] = { "-m", // cannot use at dump time
1294 "--limit-modules", // ignored at dump time
1295 "--module-path", // ignored at dump time
1296 "--upgrade-module-path", // ignored at dump time
1297 "--patch-module" // ignored at dump time
1298 };
1299 assert(ARRAY_SIZE(unsupported_properties) == ARRAY_SIZE(unsupported_options), "must be");
1300 // If a vm option is found in the unsupported_options array with index less than the info_idx,
1301 // vm will exit with an error message. Otherwise, it will print an informational message if
1302 // -Xlog:cds is enabled.
1303 uint info_idx = 1;
1304 SystemProperty* sp = system_properties();
1305 while (sp != NULL) {
1306 for (uint i = 0; i < ARRAY_SIZE(unsupported_properties); i++) {
1307 if (strcmp(sp->key(), unsupported_properties[i]) == 0) {
1308 if (i < info_idx) {
1309 vm_exit_during_initialization(
1310 "Cannot use the following option when dumping the shared archive", unsupported_options[i]);
1311 } else {
1312 log_info(cds)("Info: the %s option is ignored when dumping the shared archive",
1313 unsupported_options[i]);
1314 }
1315 }
1316 }
1317 sp = sp->next();
1318 }
1319
1320 // Check for an exploded module build in use with -Xshare:dump.
1321 if (!has_jimage()) {
1322 vm_exit_during_initialization("Dumping the shared archive is not supported with an exploded module build");
1323 }
1324 }
1325 #endif
1326
1327 //===========================================================================================================
1328 // Setting int/mixed/comp mode flags
1329
1330 void Arguments::set_mode_flags(Mode mode) {
1331 // Set up default values for all flags.
1332 // If you add a flag to any of the branches below,
1333 // add a default value for it here.
1334 set_java_compiler(false);
1335 _mode = mode;
1336
1337 // Ensure Agent_OnLoad has the correct initial values.
1338 // This may not be the final mode; mode may change later in onload phase.
1339 PropertyList_unique_add(&_system_properties, "java.vm.info",
1340 VM_Version::vm_info_string(), AddProperty, UnwriteableProperty, ExternalProperty);
1341
1342 UseInterpreter = true;
1343 UseCompiler = true;
1344 UseLoopCounter = true;
1345
1346 // Default values may be platform/compiler dependent -
1347 // use the saved values
1348 ClipInlining = Arguments::_ClipInlining;
1349 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods;
1350 UseOnStackReplacement = Arguments::_UseOnStackReplacement;
1351 BackgroundCompilation = Arguments::_BackgroundCompilation;
1352 if (TieredCompilation) {
1353 if (FLAG_IS_DEFAULT(Tier3InvokeNotifyFreqLog)) {
1354 Tier3InvokeNotifyFreqLog = Arguments::_Tier3InvokeNotifyFreqLog;
1355 }
1356 if (FLAG_IS_DEFAULT(Tier4InvocationThreshold)) {
1357 Tier4InvocationThreshold = Arguments::_Tier4InvocationThreshold;
1358 }
1359 }
1360
1361 // Change from defaults based on mode
1362 switch (mode) {
1363 default:
1364 ShouldNotReachHere();
1365 break;
1366 case _int:
1367 UseCompiler = false;
1368 UseLoopCounter = false;
1369 AlwaysCompileLoopMethods = false;
1370 UseOnStackReplacement = false;
1371 break;
1372 case _mixed:
1373 // same as default
1374 break;
1375 case _comp:
1376 UseInterpreter = false;
1377 BackgroundCompilation = false;
1378 ClipInlining = false;
1379 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more.
1380 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and
1381 // compile a level 4 (C2) and then continue executing it.
1382 if (TieredCompilation) {
1383 Tier3InvokeNotifyFreqLog = 0;
1384 Tier4InvocationThreshold = 0;
1385 }
1386 break;
1387 }
1388 }
1389
1390 // Conflict: required to use shared spaces (-Xshare:on), but
1391 // incompatible command line options were chosen.
1392 static void no_shared_spaces(const char* message) {
1393 if (RequireSharedSpaces) {
1394 jio_fprintf(defaultStream::error_stream(),
1395 "Class data sharing is inconsistent with other specified options.\n");
1396 vm_exit_during_initialization("Unable to use shared archive.", message);
1397 } else {
1398 FLAG_SET_DEFAULT(UseSharedSpaces, false);
1399 }
1400 }
1401
1402 // Returns threshold scaled with the value of scale.
1403 // If scale < 0.0, threshold is returned without scaling.
1404 intx Arguments::scaled_compile_threshold(intx threshold, double scale) {
1405 if (scale == 1.0 || scale < 0.0) {
1406 return threshold;
1407 } else {
1408 return (intx)(threshold * scale);
1409 }
1410 }
1411
1412 // Returns freq_log scaled with the value of scale.
1413 // Returned values are in the range of [0, InvocationCounter::number_of_count_bits + 1].
1414 // If scale < 0.0, freq_log is returned without scaling.
1415 intx Arguments::scaled_freq_log(intx freq_log, double scale) {
1416 // Check if scaling is necessary or if negative value was specified.
1417 if (scale == 1.0 || scale < 0.0) {
1418 return freq_log;
1419 }
1420 // Check values to avoid calculating log2 of 0.
1421 if (scale == 0.0 || freq_log == 0) {
1422 return 0;
1423 }
1424 // Determine the maximum notification frequency value currently supported.
1425 // The largest mask value that the interpreter/C1 can handle is
1426 // of length InvocationCounter::number_of_count_bits. Mask values are always
1427 // one bit shorter then the value of the notification frequency. Set
1428 // max_freq_bits accordingly.
1429 intx max_freq_bits = InvocationCounter::number_of_count_bits + 1;
1430 intx scaled_freq = scaled_compile_threshold((intx)1 << freq_log, scale);
1431 if (scaled_freq == 0) {
1432 // Return 0 right away to avoid calculating log2 of 0.
1433 return 0;
1434 } else if (scaled_freq > nth_bit(max_freq_bits)) {
1435 return max_freq_bits;
1436 } else {
1437 return log2_intptr(scaled_freq);
1438 }
1439 }
1440
1441 void Arguments::set_tiered_flags() {
1442 // With tiered, set default policy to AdvancedThresholdPolicy, which is 3.
1443 if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) {
1444 FLAG_SET_DEFAULT(CompilationPolicyChoice, 3);
1445 }
1446 if (CompilationPolicyChoice < 2) {
1447 vm_exit_during_initialization(
1448 "Incompatible compilation policy selected", NULL);
1449 }
1450 // Increase the code cache size - tiered compiles a lot more.
1451 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
1452 FLAG_SET_ERGO(uintx, ReservedCodeCacheSize,
1453 MIN2(CODE_CACHE_DEFAULT_LIMIT, ReservedCodeCacheSize * 5));
1454 }
1455 // Enable SegmentedCodeCache if TieredCompilation is enabled and ReservedCodeCacheSize >= 240M
1456 if (FLAG_IS_DEFAULT(SegmentedCodeCache) && ReservedCodeCacheSize >= 240*M) {
1457 FLAG_SET_ERGO(bool, SegmentedCodeCache, true);
1458 }
1459 if (!UseInterpreter) { // -Xcomp
1460 Tier3InvokeNotifyFreqLog = 0;
1461 Tier4InvocationThreshold = 0;
1462 }
1463
1464 if (CompileThresholdScaling < 0) {
1465 vm_exit_during_initialization("Negative value specified for CompileThresholdScaling", NULL);
1466 }
1467
1468 // Scale tiered compilation thresholds.
1469 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves compilation thresholds unchanged.
1470 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
1471 FLAG_SET_ERGO(intx, Tier0InvokeNotifyFreqLog, scaled_freq_log(Tier0InvokeNotifyFreqLog));
1472 FLAG_SET_ERGO(intx, Tier0BackedgeNotifyFreqLog, scaled_freq_log(Tier0BackedgeNotifyFreqLog));
1473
1474 FLAG_SET_ERGO(intx, Tier3InvocationThreshold, scaled_compile_threshold(Tier3InvocationThreshold));
1475 FLAG_SET_ERGO(intx, Tier3MinInvocationThreshold, scaled_compile_threshold(Tier3MinInvocationThreshold));
1476 FLAG_SET_ERGO(intx, Tier3CompileThreshold, scaled_compile_threshold(Tier3CompileThreshold));
1477 FLAG_SET_ERGO(intx, Tier3BackEdgeThreshold, scaled_compile_threshold(Tier3BackEdgeThreshold));
1478
1479 // Tier2{Invocation,MinInvocation,Compile,Backedge}Threshold should be scaled here
1480 // once these thresholds become supported.
1481
1482 FLAG_SET_ERGO(intx, Tier2InvokeNotifyFreqLog, scaled_freq_log(Tier2InvokeNotifyFreqLog));
1483 FLAG_SET_ERGO(intx, Tier2BackedgeNotifyFreqLog, scaled_freq_log(Tier2BackedgeNotifyFreqLog));
1484
1485 FLAG_SET_ERGO(intx, Tier3InvokeNotifyFreqLog, scaled_freq_log(Tier3InvokeNotifyFreqLog));
1486 FLAG_SET_ERGO(intx, Tier3BackedgeNotifyFreqLog, scaled_freq_log(Tier3BackedgeNotifyFreqLog));
1487
1488 FLAG_SET_ERGO(intx, Tier23InlineeNotifyFreqLog, scaled_freq_log(Tier23InlineeNotifyFreqLog));
1489
1490 FLAG_SET_ERGO(intx, Tier4InvocationThreshold, scaled_compile_threshold(Tier4InvocationThreshold));
1491 FLAG_SET_ERGO(intx, Tier4MinInvocationThreshold, scaled_compile_threshold(Tier4MinInvocationThreshold));
1492 FLAG_SET_ERGO(intx, Tier4CompileThreshold, scaled_compile_threshold(Tier4CompileThreshold));
1493 FLAG_SET_ERGO(intx, Tier4BackEdgeThreshold, scaled_compile_threshold(Tier4BackEdgeThreshold));
1494 }
1495 }
1496
1497 void set_object_alignment() {
1498 // Object alignment.
1499 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2");
1500 MinObjAlignmentInBytes = ObjectAlignmentInBytes;
1501 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small");
1502 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize;
1503 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect");
1504 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1;
1505
1506 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes);
1507 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize;
1508
1509 // Oop encoding heap max
1510 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes;
1511
1512 if (SurvivorAlignmentInBytes == 0) {
1513 SurvivorAlignmentInBytes = ObjectAlignmentInBytes;
1514 }
1515 }
1516
1517 size_t Arguments::max_heap_for_compressed_oops() {
1518 // Avoid sign flip.
1519 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size");
1520 // We need to fit both the NULL page and the heap into the memory budget, while
1521 // keeping alignment constraints of the heap. To guarantee the latter, as the
1522 // NULL page is located before the heap, we pad the NULL page to the conservative
1523 // maximum alignment that the GC may ever impose upon the heap.
1524 size_t displacement_due_to_null_page = align_up((size_t)os::vm_page_size(),
1525 _conservative_max_heap_alignment);
1526
1527 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page);
1528 NOT_LP64(ShouldNotReachHere(); return 0);
1529 }
1530
1531 void Arguments::set_use_compressed_oops() {
1532 #ifndef ZERO
1533 #ifdef _LP64
1534 // MaxHeapSize is not set up properly at this point, but
1535 // the only value that can override MaxHeapSize if we are
1536 // to use UseCompressedOops is InitialHeapSize.
1537 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize);
1538
1539 if (max_heap_size <= max_heap_for_compressed_oops()) {
1540 #if !defined(COMPILER1) || defined(TIERED)
1541 if (FLAG_IS_DEFAULT(UseCompressedOops)) {
1542 FLAG_SET_ERGO(bool, UseCompressedOops, true);
1543 }
1544 #endif
1545 } else {
1546 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) {
1547 warning("Max heap size too large for Compressed Oops");
1548 FLAG_SET_DEFAULT(UseCompressedOops, false);
1549 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1550 }
1551 }
1552 #endif // _LP64
1553 #endif // ZERO
1554 }
1555
1556
1557 // NOTE: set_use_compressed_klass_ptrs() must be called after calling
1558 // set_use_compressed_oops().
1559 void Arguments::set_use_compressed_klass_ptrs() {
1560 #ifndef ZERO
1561 #ifdef _LP64
1562 // UseCompressedOops must be on for UseCompressedClassPointers to be on.
1563 if (!UseCompressedOops) {
1564 if (UseCompressedClassPointers) {
1565 warning("UseCompressedClassPointers requires UseCompressedOops");
1566 }
1567 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1568 } else {
1569 // Turn on UseCompressedClassPointers too
1570 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) {
1571 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true);
1572 }
1573 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs.
1574 if (UseCompressedClassPointers) {
1575 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) {
1576 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers");
1577 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1578 }
1579 }
1580 }
1581 #endif // _LP64
1582 #endif // !ZERO
1583 }
1584
1585 void Arguments::set_conservative_max_heap_alignment() {
1586 // The conservative maximum required alignment for the heap is the maximum of
1587 // the alignments imposed by several sources: any requirements from the heap
1588 // itself, the collector policy and the maximum page size we may run the VM
1589 // with.
1590 size_t heap_alignment = GCArguments::instance()->conservative_max_heap_alignment();
1591 _conservative_max_heap_alignment = MAX4(heap_alignment,
1592 (size_t)os::vm_allocation_granularity(),
1593 os::max_page_size(),
1594 CollectorPolicy::compute_heap_alignment());
1595 }
1596
1597 #ifdef TIERED
1598 bool Arguments::compilation_mode_selected() {
1599 return !FLAG_IS_DEFAULT(TieredCompilation) || !FLAG_IS_DEFAULT(TieredStopAtLevel) ||
1600 !FLAG_IS_DEFAULT(UseAOT) JVMCI_ONLY(|| !FLAG_IS_DEFAULT(EnableJVMCI) || !FLAG_IS_DEFAULT(UseJVMCICompiler));
1601
1602 }
1603
1604 void Arguments::select_compilation_mode_ergonomically() {
1605 #if defined(_WINDOWS) && !defined(_LP64)
1606 if (FLAG_IS_DEFAULT(NeverActAsServerClassMachine)) {
1607 FLAG_SET_ERGO(bool, NeverActAsServerClassMachine, true);
1608 }
1609 #endif
1610 if (NeverActAsServerClassMachine) {
1611 set_client_compilation_mode();
1612 }
1613 }
1614 #endif //TIERED
1615
1616 #if INCLUDE_JVMCI
1617 void Arguments::set_jvmci_specific_flags() {
1618 if (UseJVMCICompiler) {
1619 if (FLAG_IS_DEFAULT(TypeProfileWidth)) {
1620 FLAG_SET_DEFAULT(TypeProfileWidth, 8);
1621 }
1622 if (FLAG_IS_DEFAULT(OnStackReplacePercentage)) {
1623 FLAG_SET_DEFAULT(OnStackReplacePercentage, 933);
1624 }
1625 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
1626 FLAG_SET_DEFAULT(ReservedCodeCacheSize, 64*M);
1627 }
1628 if (FLAG_IS_DEFAULT(InitialCodeCacheSize)) {
1629 FLAG_SET_DEFAULT(InitialCodeCacheSize, 16*M);
1630 }
1631 if (FLAG_IS_DEFAULT(MetaspaceSize)) {
1632 FLAG_SET_DEFAULT(MetaspaceSize, 12*M);
1633 }
1634 if (FLAG_IS_DEFAULT(NewSizeThreadIncrease)) {
1635 FLAG_SET_DEFAULT(NewSizeThreadIncrease, 4*K);
1636 }
1637 if (TieredStopAtLevel != CompLevel_full_optimization) {
1638 // Currently JVMCI compiler can only work at the full optimization level
1639 warning("forcing TieredStopAtLevel to full optimization because JVMCI is enabled");
1640 TieredStopAtLevel = CompLevel_full_optimization;
1641 }
1642 if (FLAG_IS_DEFAULT(TypeProfileLevel)) {
1643 FLAG_SET_DEFAULT(TypeProfileLevel, 0);
1644 }
1645 }
1646 }
1647 #endif
1648
1649 jint Arguments::set_ergonomics_flags() {
1650 #ifdef TIERED
1651 if (!compilation_mode_selected()) {
1652 select_compilation_mode_ergonomically();
1653 }
1654 #endif
1655
1656 jint gc_result = GCArguments::create_instance();
1657 if (gc_result != JNI_OK) {
1658 return gc_result;
1659 }
1660
1661 #if defined(COMPILER2) || INCLUDE_JVMCI
1662 // Shared spaces work fine with other GCs but causes bytecode rewriting
1663 // to be disabled, which hurts interpreter performance and decreases
1664 // server performance. When -server is specified, keep the default off
1665 // unless it is asked for. Future work: either add bytecode rewriting
1666 // at link time, or rewrite bytecodes in non-shared methods.
1667 if (is_server_compilation_mode_vm() && !DumpSharedSpaces && !RequireSharedSpaces &&
1668 (FLAG_IS_DEFAULT(UseSharedSpaces) || !UseSharedSpaces)) {
1669 no_shared_spaces("COMPILER2 default: -Xshare:auto | off, have to manually setup to on.");
1670 }
1671 #endif
1672
1673 set_conservative_max_heap_alignment();
1674
1675 #ifndef ZERO
1676 #ifdef _LP64
1677 set_use_compressed_oops();
1678
1679 // set_use_compressed_klass_ptrs() must be called after calling
1680 // set_use_compressed_oops().
1681 set_use_compressed_klass_ptrs();
1682
1683 // Also checks that certain machines are slower with compressed oops
1684 // in vm_version initialization code.
1685 #endif // _LP64
1686 #endif // !ZERO
1687
1688 return JNI_OK;
1689 }
1690
1691 void Arguments::set_gc_specific_flags() {
1692 // Set GC flags
1693 GCArguments::instance()->initialize_flags();
1694 }
1695
1696 julong Arguments::limit_by_allocatable_memory(julong limit) {
1697 julong max_allocatable;
1698 julong result = limit;
1699 if (os::has_allocatable_memory_limit(&max_allocatable)) {
1700 result = MIN2(result, max_allocatable / MaxVirtMemFraction);
1701 }
1702 return result;
1703 }
1704
1705 // Use static initialization to get the default before parsing
1706 static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress;
1707
1708 void Arguments::set_heap_size() {
1709 julong phys_mem =
1710 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM)
1711 : (julong)MaxRAM;
1712
1713 // Experimental support for CGroup memory limits
1714 if (UseCGroupMemoryLimitForHeap) {
1715 // This is a rough indicator that a CGroup limit may be in force
1716 // for this process
1717 const char* lim_file = "/sys/fs/cgroup/memory/memory.limit_in_bytes";
1718 FILE *fp = fopen(lim_file, "r");
1719 if (fp != NULL) {
1720 julong cgroup_max = 0;
1721 int ret = fscanf(fp, JULONG_FORMAT, &cgroup_max);
1722 if (ret == 1 && cgroup_max > 0) {
1723 // If unlimited, cgroup_max will be a very large, but unspecified
1724 // value, so use initial phys_mem as a limit
1725 log_info(gc, heap)("Setting phys_mem to the min of cgroup limit ("
1726 JULONG_FORMAT "MB) and initial phys_mem ("
1727 JULONG_FORMAT "MB)", cgroup_max/M, phys_mem/M);
1728 phys_mem = MIN2(cgroup_max, phys_mem);
1729 } else {
1730 warning("Unable to read/parse cgroup memory limit from %s: %s",
1731 lim_file, errno != 0 ? strerror(errno) : "unknown error");
1732 }
1733 fclose(fp);
1734 } else {
1735 warning("Unable to open cgroup memory limit file %s (%s)", lim_file, strerror(errno));
1736 }
1737 }
1738
1739 // Convert deprecated flags
1740 if (FLAG_IS_DEFAULT(MaxRAMPercentage) &&
1741 !FLAG_IS_DEFAULT(MaxRAMFraction))
1742 MaxRAMPercentage = 100.0 / MaxRAMFraction;
1743
1744 if (FLAG_IS_DEFAULT(MinRAMPercentage) &&
1745 !FLAG_IS_DEFAULT(MinRAMFraction))
1746 MinRAMPercentage = 100.0 / MinRAMFraction;
1747
1748 if (FLAG_IS_DEFAULT(InitialRAMPercentage) &&
1749 !FLAG_IS_DEFAULT(InitialRAMFraction))
1750 InitialRAMPercentage = 100.0 / InitialRAMFraction;
1751
1752 // If the maximum heap size has not been set with -Xmx,
1753 // then set it as fraction of the size of physical memory,
1754 // respecting the maximum and minimum sizes of the heap.
1755 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
1756 julong reasonable_max = (julong)((phys_mem * MaxRAMPercentage) / 100);
1757 if (phys_mem <= (julong)((MaxHeapSize * MinRAMPercentage) / 100)) {
1758 // Small physical memory, so use a minimum fraction of it for the heap
1759 reasonable_max = (julong)((phys_mem * MinRAMPercentage) / 100);
1760 } else {
1761 // Not-small physical memory, so require a heap at least
1762 // as large as MaxHeapSize
1763 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize);
1764 }
1765
1766 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) {
1767 // Limit the heap size to ErgoHeapSizeLimit
1768 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit);
1769 }
1770 if (UseCompressedOops) {
1771 // Limit the heap size to the maximum possible when using compressed oops
1772 julong max_coop_heap = (julong)max_heap_for_compressed_oops();
1773
1774 // HeapBaseMinAddress can be greater than default but not less than.
1775 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) {
1776 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) {
1777 // matches compressed oops printing flags
1778 log_debug(gc, heap, coops)("HeapBaseMinAddress must be at least " SIZE_FORMAT
1779 " (" SIZE_FORMAT "G) which is greater than value given " SIZE_FORMAT,
1780 DefaultHeapBaseMinAddress,
1781 DefaultHeapBaseMinAddress/G,
1782 HeapBaseMinAddress);
1783 FLAG_SET_ERGO(size_t, HeapBaseMinAddress, DefaultHeapBaseMinAddress);
1784 }
1785 }
1786
1787 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) {
1788 // Heap should be above HeapBaseMinAddress to get zero based compressed oops
1789 // but it should be not less than default MaxHeapSize.
1790 max_coop_heap -= HeapBaseMinAddress;
1791 }
1792 reasonable_max = MIN2(reasonable_max, max_coop_heap);
1793 }
1794 reasonable_max = limit_by_allocatable_memory(reasonable_max);
1795
1796 if (!FLAG_IS_DEFAULT(InitialHeapSize)) {
1797 // An initial heap size was specified on the command line,
1798 // so be sure that the maximum size is consistent. Done
1799 // after call to limit_by_allocatable_memory because that
1800 // method might reduce the allocation size.
1801 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize);
1802 }
1803
1804 log_trace(gc, heap)(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max);
1805 FLAG_SET_ERGO(size_t, MaxHeapSize, (size_t)reasonable_max);
1806 }
1807
1808 // If the minimum or initial heap_size have not been set or requested to be set
1809 // ergonomically, set them accordingly.
1810 if (InitialHeapSize == 0 || min_heap_size() == 0) {
1811 julong reasonable_minimum = (julong)(OldSize + NewSize);
1812
1813 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize);
1814
1815 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum);
1816
1817 if (InitialHeapSize == 0) {
1818 julong reasonable_initial = (julong)((phys_mem * InitialRAMPercentage) / 100);
1819
1820 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size());
1821 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize);
1822
1823 reasonable_initial = limit_by_allocatable_memory(reasonable_initial);
1824
1825 log_trace(gc, heap)(" Initial heap size " SIZE_FORMAT, (size_t)reasonable_initial);
1826 FLAG_SET_ERGO(size_t, InitialHeapSize, (size_t)reasonable_initial);
1827 }
1828 // If the minimum heap size has not been set (via -Xms),
1829 // synchronize with InitialHeapSize to avoid errors with the default value.
1830 if (min_heap_size() == 0) {
1831 set_min_heap_size(MIN2((size_t)reasonable_minimum, InitialHeapSize));
1832 log_trace(gc, heap)(" Minimum heap size " SIZE_FORMAT, min_heap_size());
1833 }
1834 }
1835 }
1836
1837 // This option inspects the machine and attempts to set various
1838 // parameters to be optimal for long-running, memory allocation
1839 // intensive jobs. It is intended for machines with large
1840 // amounts of cpu and memory.
1841 jint Arguments::set_aggressive_heap_flags() {
1842 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit
1843 // VM, but we may not be able to represent the total physical memory
1844 // available (like having 8gb of memory on a box but using a 32bit VM).
1845 // Thus, we need to make sure we're using a julong for intermediate
1846 // calculations.
1847 julong initHeapSize;
1848 julong total_memory = os::physical_memory();
1849
1850 if (total_memory < (julong) 256 * M) {
1851 jio_fprintf(defaultStream::error_stream(),
1852 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n");
1853 vm_exit(1);
1854 }
1855
1856 // The heap size is half of available memory, or (at most)
1857 // all of possible memory less 160mb (leaving room for the OS
1858 // when using ISM). This is the maximum; because adaptive sizing
1859 // is turned on below, the actual space used may be smaller.
1860
1861 initHeapSize = MIN2(total_memory / (julong) 2,
1862 total_memory - (julong) 160 * M);
1863
1864 initHeapSize = limit_by_allocatable_memory(initHeapSize);
1865
1866 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
1867 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, initHeapSize) != Flag::SUCCESS) {
1868 return JNI_EINVAL;
1869 }
1870 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, initHeapSize) != Flag::SUCCESS) {
1871 return JNI_EINVAL;
1872 }
1873 // Currently the minimum size and the initial heap sizes are the same.
1874 set_min_heap_size(initHeapSize);
1875 }
1876 if (FLAG_IS_DEFAULT(NewSize)) {
1877 // Make the young generation 3/8ths of the total heap.
1878 if (FLAG_SET_CMDLINE(size_t, NewSize,
1879 ((julong) MaxHeapSize / (julong) 8) * (julong) 3) != Flag::SUCCESS) {
1880 return JNI_EINVAL;
1881 }
1882 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, NewSize) != Flag::SUCCESS) {
1883 return JNI_EINVAL;
1884 }
1885 }
1886
1887 #if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
1888 FLAG_SET_DEFAULT(UseLargePages, true);
1889 #endif
1890
1891 // Increase some data structure sizes for efficiency
1892 if (FLAG_SET_CMDLINE(size_t, BaseFootPrintEstimate, MaxHeapSize) != Flag::SUCCESS) {
1893 return JNI_EINVAL;
1894 }
1895 if (FLAG_SET_CMDLINE(bool, ResizeTLAB, false) != Flag::SUCCESS) {
1896 return JNI_EINVAL;
1897 }
1898 if (FLAG_SET_CMDLINE(size_t, TLABSize, 256 * K) != Flag::SUCCESS) {
1899 return JNI_EINVAL;
1900 }
1901
1902 // See the OldPLABSize comment below, but replace 'after promotion'
1903 // with 'after copying'. YoungPLABSize is the size of the survivor
1904 // space per-gc-thread buffers. The default is 4kw.
1905 if (FLAG_SET_CMDLINE(size_t, YoungPLABSize, 256 * K) != Flag::SUCCESS) { // Note: this is in words
1906 return JNI_EINVAL;
1907 }
1908
1909 // OldPLABSize is the size of the buffers in the old gen that
1910 // UseParallelGC uses to promote live data that doesn't fit in the
1911 // survivor spaces. At any given time, there's one for each gc thread.
1912 // The default size is 1kw. These buffers are rarely used, since the
1913 // survivor spaces are usually big enough. For specjbb, however, there
1914 // are occasions when there's lots of live data in the young gen
1915 // and we end up promoting some of it. We don't have a definite
1916 // explanation for why bumping OldPLABSize helps, but the theory
1917 // is that a bigger PLAB results in retaining something like the
1918 // original allocation order after promotion, which improves mutator
1919 // locality. A minor effect may be that larger PLABs reduce the
1920 // number of PLAB allocation events during gc. The value of 8kw
1921 // was arrived at by experimenting with specjbb.
1922 if (FLAG_SET_CMDLINE(size_t, OldPLABSize, 8 * K) != Flag::SUCCESS) { // Note: this is in words
1923 return JNI_EINVAL;
1924 }
1925
1926 // Enable parallel GC and adaptive generation sizing
1927 if (FLAG_SET_CMDLINE(bool, UseParallelGC, true) != Flag::SUCCESS) {
1928 return JNI_EINVAL;
1929 }
1930
1931 // Encourage steady state memory management
1932 if (FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100) != Flag::SUCCESS) {
1933 return JNI_EINVAL;
1934 }
1935
1936 // This appears to improve mutator locality
1937 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
1938 return JNI_EINVAL;
1939 }
1940
1941 // Get around early Solaris scheduling bug
1942 // (affinity vs other jobs on system)
1943 // but disallow DR and offlining (5008695).
1944 if (FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true) != Flag::SUCCESS) {
1945 return JNI_EINVAL;
1946 }
1947
1948 return JNI_OK;
1949 }
1950
1951 // This must be called after ergonomics.
1952 void Arguments::set_bytecode_flags() {
1953 if (!RewriteBytecodes) {
1954 FLAG_SET_DEFAULT(RewriteFrequentPairs, false);
1955 }
1956 }
1957
1958 // Aggressive optimization flags -XX:+AggressiveOpts
1959 jint Arguments::set_aggressive_opts_flags() {
1960 #ifdef COMPILER2
1961 if (AggressiveUnboxing) {
1962 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
1963 FLAG_SET_DEFAULT(EliminateAutoBox, true);
1964 } else if (!EliminateAutoBox) {
1965 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled");
1966 AggressiveUnboxing = false;
1967 }
1968 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) {
1969 FLAG_SET_DEFAULT(DoEscapeAnalysis, true);
1970 } else if (!DoEscapeAnalysis) {
1971 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled");
1972 AggressiveUnboxing = false;
1973 }
1974 }
1975 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
1976 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
1977 FLAG_SET_DEFAULT(EliminateAutoBox, true);
1978 }
1979 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
1980 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000);
1981 }
1982
1983 // Feed the cache size setting into the JDK
1984 char buffer[1024];
1985 jio_snprintf(buffer, 1024, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax);
1986 if (!add_property(buffer)) {
1987 return JNI_ENOMEM;
1988 }
1989 }
1990 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) {
1991 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500);
1992 }
1993 #endif
1994
1995 if (AggressiveOpts) {
1996 // Sample flag setting code
1997 // if (FLAG_IS_DEFAULT(EliminateZeroing)) {
1998 // FLAG_SET_DEFAULT(EliminateZeroing, true);
1999 // }
2000 }
2001
2002 return JNI_OK;
2003 }
2004
2005 //===========================================================================================================
2006 // Parsing of java.compiler property
2007
2008 void Arguments::process_java_compiler_argument(const char* arg) {
2009 // For backwards compatibility, Djava.compiler=NONE or ""
2010 // causes us to switch to -Xint mode UNLESS -Xdebug
2011 // is also specified.
2012 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) {
2013 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen.
2014 }
2015 }
2016
2017 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) {
2018 _sun_java_launcher = os::strdup_check_oom(launcher);
2019 }
2020
2021 bool Arguments::created_by_java_launcher() {
2022 assert(_sun_java_launcher != NULL, "property must have value");
2023 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0;
2024 }
2025
2026 bool Arguments::sun_java_launcher_is_altjvm() {
2027 return _sun_java_launcher_is_altjvm;
2028 }
2029
2030 //===========================================================================================================
2031 // Parsing of main arguments
2032
2033 #if INCLUDE_JVMCI
2034 // Check consistency of jvmci vm argument settings.
2035 bool Arguments::check_jvmci_args_consistency() {
2036 return JVMCIGlobals::check_jvmci_flags_are_consistent();
2037 }
2038 #endif //INCLUDE_JVMCI
2039
2040 // Check consistency of GC selection
2041 bool Arguments::check_gc_consistency() {
2042 // Ensure that the user has not selected conflicting sets
2043 // of collectors.
2044 uint i = 0;
2045 if (UseSerialGC) i++;
2046 if (UseConcMarkSweepGC) i++;
2047 if (UseParallelGC || UseParallelOldGC) i++;
2048 if (UseG1GC) i++;
2049 if (i > 1) {
2050 jio_fprintf(defaultStream::error_stream(),
2051 "Conflicting collector combinations in option list; "
2052 "please refer to the release notes for the combinations "
2053 "allowed\n");
2054 return false;
2055 }
2056
2057 return true;
2058 }
2059
2060 // Check the consistency of vm_init_args
2061 bool Arguments::check_vm_args_consistency() {
2062 // Method for adding checks for flag consistency.
2063 // The intent is to warn the user of all possible conflicts,
2064 // before returning an error.
2065 // Note: Needs platform-dependent factoring.
2066 bool status = true;
2067
2068 if (TLABRefillWasteFraction == 0) {
2069 jio_fprintf(defaultStream::error_stream(),
2070 "TLABRefillWasteFraction should be a denominator, "
2071 "not " SIZE_FORMAT "\n",
2072 TLABRefillWasteFraction);
2073 status = false;
2074 }
2075
2076 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) {
2077 MarkSweepAlwaysCompactCount = 1; // Move objects every gc.
2078 }
2079
2080 if (!(UseParallelGC || UseParallelOldGC) && FLAG_IS_DEFAULT(ScavengeBeforeFullGC)) {
2081 FLAG_SET_DEFAULT(ScavengeBeforeFullGC, false);
2082 }
2083
2084 if (GCTimeLimit == 100) {
2085 // Turn off gc-overhead-limit-exceeded checks
2086 FLAG_SET_DEFAULT(UseGCOverheadLimit, false);
2087 }
2088
2089 status = status && check_gc_consistency();
2090
2091 // CMS space iteration, which FLSVerifyAllHeapreferences entails,
2092 // insists that we hold the requisite locks so that the iteration is
2093 // MT-safe. For the verification at start-up and shut-down, we don't
2094 // yet have a good way of acquiring and releasing these locks,
2095 // which are not visible at the CollectedHeap level. We want to
2096 // be able to acquire these locks and then do the iteration rather
2097 // than just disable the lock verification. This will be fixed under
2098 // bug 4788986.
2099 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) {
2100 if (VerifyDuringStartup) {
2101 warning("Heap verification at start-up disabled "
2102 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
2103 VerifyDuringStartup = false; // Disable verification at start-up
2104 }
2105
2106 if (VerifyBeforeExit) {
2107 warning("Heap verification at shutdown disabled "
2108 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
2109 VerifyBeforeExit = false; // Disable verification at shutdown
2110 }
2111 }
2112
2113 if (PrintNMTStatistics) {
2114 #if INCLUDE_NMT
2115 if (MemTracker::tracking_level() == NMT_off) {
2116 #endif // INCLUDE_NMT
2117 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled");
2118 PrintNMTStatistics = false;
2119 #if INCLUDE_NMT
2120 }
2121 #endif
2122 }
2123
2124 #if INCLUDE_JVMCI
2125 status = status && check_jvmci_args_consistency();
2126
2127 if (EnableJVMCI) {
2128 PropertyList_unique_add(&_system_properties, "jdk.internal.vm.ci.enabled", "true",
2129 AddProperty, UnwriteableProperty, InternalProperty);
2130
2131 if (!ScavengeRootsInCode) {
2132 warning("forcing ScavengeRootsInCode non-zero because JVMCI is enabled");
2133 ScavengeRootsInCode = 1;
2134 }
2135 }
2136 #endif
2137
2138 // Check lower bounds of the code cache
2139 // Template Interpreter code is approximately 3X larger in debug builds.
2140 uint min_code_cache_size = CodeCacheMinimumUseSpace DEBUG_ONLY(* 3);
2141 if (InitialCodeCacheSize < (uintx)os::vm_page_size()) {
2142 jio_fprintf(defaultStream::error_stream(),
2143 "Invalid InitialCodeCacheSize=%dK. Must be at least %dK.\n", InitialCodeCacheSize/K,
2144 os::vm_page_size()/K);
2145 status = false;
2146 } else if (ReservedCodeCacheSize < InitialCodeCacheSize) {
2147 jio_fprintf(defaultStream::error_stream(),
2148 "Invalid ReservedCodeCacheSize: %dK. Must be at least InitialCodeCacheSize=%dK.\n",
2149 ReservedCodeCacheSize/K, InitialCodeCacheSize/K);
2150 status = false;
2151 } else if (ReservedCodeCacheSize < min_code_cache_size) {
2152 jio_fprintf(defaultStream::error_stream(),
2153 "Invalid ReservedCodeCacheSize=%dK. Must be at least %uK.\n", ReservedCodeCacheSize/K,
2154 min_code_cache_size/K);
2155 status = false;
2156 } else if (ReservedCodeCacheSize > CODE_CACHE_SIZE_LIMIT) {
2157 // Code cache size larger than CODE_CACHE_SIZE_LIMIT is not supported.
2158 jio_fprintf(defaultStream::error_stream(),
2159 "Invalid ReservedCodeCacheSize=%dM. Must be at most %uM.\n", ReservedCodeCacheSize/M,
2160 CODE_CACHE_SIZE_LIMIT/M);
2161 status = false;
2162 } else if (NonNMethodCodeHeapSize < min_code_cache_size) {
2163 jio_fprintf(defaultStream::error_stream(),
2164 "Invalid NonNMethodCodeHeapSize=%dK. Must be at least %uK.\n", NonNMethodCodeHeapSize/K,
2165 min_code_cache_size/K);
2166 status = false;
2167 }
2168
2169 #ifdef _LP64
2170 if (!FLAG_IS_DEFAULT(CICompilerCount) && !FLAG_IS_DEFAULT(CICompilerCountPerCPU) && CICompilerCountPerCPU) {
2171 warning("The VM option CICompilerCountPerCPU overrides CICompilerCount.");
2172 }
2173 #endif
2174
2175 #ifndef SUPPORT_RESERVED_STACK_AREA
2176 if (StackReservedPages != 0) {
2177 FLAG_SET_CMDLINE(intx, StackReservedPages, 0);
2178 warning("Reserved Stack Area not supported on this platform");
2179 }
2180 #endif
2181
2182 if (BackgroundCompilation && (CompileTheWorld || ReplayCompiles)) {
2183 if (!FLAG_IS_DEFAULT(BackgroundCompilation)) {
2184 warning("BackgroundCompilation disabled due to CompileTheWorld or ReplayCompiles options.");
2185 }
2186 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false);
2187 }
2188 if (UseCompiler && is_interpreter_only()) {
2189 if (!FLAG_IS_DEFAULT(UseCompiler)) {
2190 warning("UseCompiler disabled due to -Xint.");
2191 }
2192 FLAG_SET_CMDLINE(bool, UseCompiler, false);
2193 }
2194 #ifdef COMPILER2
2195 if (PostLoopMultiversioning && !RangeCheckElimination) {
2196 if (!FLAG_IS_DEFAULT(PostLoopMultiversioning)) {
2197 warning("PostLoopMultiversioning disabled because RangeCheckElimination is disabled.");
2198 }
2199 FLAG_SET_CMDLINE(bool, PostLoopMultiversioning, false);
2200 }
2201 #endif
2202 return status;
2203 }
2204
2205 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore,
2206 const char* option_type) {
2207 if (ignore) return false;
2208
2209 const char* spacer = " ";
2210 if (option_type == NULL) {
2211 option_type = ++spacer; // Set both to the empty string.
2212 }
2213
2214 if (os::obsolete_option(option)) {
2215 jio_fprintf(defaultStream::error_stream(),
2216 "Obsolete %s%soption: %s\n", option_type, spacer,
2217 option->optionString);
2218 return false;
2219 } else {
2220 jio_fprintf(defaultStream::error_stream(),
2221 "Unrecognized %s%soption: %s\n", option_type, spacer,
2222 option->optionString);
2223 return true;
2224 }
2225 }
2226
2227 static const char* user_assertion_options[] = {
2228 "-da", "-ea", "-disableassertions", "-enableassertions", 0
2229 };
2230
2231 static const char* system_assertion_options[] = {
2232 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0
2233 };
2234
2235 bool Arguments::parse_uintx(const char* value,
2236 uintx* uintx_arg,
2237 uintx min_size) {
2238
2239 // Check the sign first since atojulong() parses only unsigned values.
2240 bool value_is_positive = !(*value == '-');
2241
2242 if (value_is_positive) {
2243 julong n;
2244 bool good_return = atojulong(value, &n);
2245 if (good_return) {
2246 bool above_minimum = n >= min_size;
2247 bool value_is_too_large = n > max_uintx;
2248
2249 if (above_minimum && !value_is_too_large) {
2250 *uintx_arg = n;
2251 return true;
2252 }
2253 }
2254 }
2255 return false;
2256 }
2257
2258 unsigned int addreads_count = 0;
2259 unsigned int addexports_count = 0;
2260 unsigned int addopens_count = 0;
2261 unsigned int addmods_count = 0;
2262 unsigned int patch_mod_count = 0;
2263
2264 bool Arguments::create_property(const char* prop_name, const char* prop_value, PropertyInternal internal) {
2265 size_t prop_len = strlen(prop_name) + strlen(prop_value) + 2;
2266 char* property = AllocateHeap(prop_len, mtArguments);
2267 int ret = jio_snprintf(property, prop_len, "%s=%s", prop_name, prop_value);
2268 if (ret < 0 || ret >= (int)prop_len) {
2269 FreeHeap(property);
2270 return false;
2271 }
2272 bool added = add_property(property, UnwriteableProperty, internal);
2273 FreeHeap(property);
2274 return added;
2275 }
2276
2277 bool Arguments::create_numbered_property(const char* prop_base_name, const char* prop_value, unsigned int count) {
2278 const unsigned int props_count_limit = 1000;
2279 const int max_digits = 3;
2280 const int extra_symbols_count = 3; // includes '.', '=', '\0'
2281
2282 // Make sure count is < props_count_limit. Otherwise, memory allocation will be too small.
2283 if (count < props_count_limit) {
2284 size_t prop_len = strlen(prop_base_name) + strlen(prop_value) + max_digits + extra_symbols_count;
2285 char* property = AllocateHeap(prop_len, mtArguments);
2286 int ret = jio_snprintf(property, prop_len, "%s.%d=%s", prop_base_name, count, prop_value);
2287 if (ret < 0 || ret >= (int)prop_len) {
2288 FreeHeap(property);
2289 jio_fprintf(defaultStream::error_stream(), "Failed to create property %s.%d=%s\n", prop_base_name, count, prop_value);
2290 return false;
2291 }
2292 bool added = add_property(property, UnwriteableProperty, InternalProperty);
2293 FreeHeap(property);
2294 return added;
2295 }
2296
2297 jio_fprintf(defaultStream::error_stream(), "Property count limit exceeded: %s, limit=%d\n", prop_base_name, props_count_limit);
2298 return false;
2299 }
2300
2301 Arguments::ArgsRange Arguments::parse_memory_size(const char* s,
2302 julong* long_arg,
2303 julong min_size,
2304 julong max_size) {
2305 if (!atojulong(s, long_arg)) return arg_unreadable;
2306 return check_memory_size(*long_arg, min_size, max_size);
2307 }
2308
2309 // Parse JavaVMInitArgs structure
2310
2311 jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args,
2312 const JavaVMInitArgs *java_options_args,
2313 const JavaVMInitArgs *cmd_line_args) {
2314 bool patch_mod_javabase = false;
2315
2316 // Save default settings for some mode flags
2317 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
2318 Arguments::_UseOnStackReplacement = UseOnStackReplacement;
2319 Arguments::_ClipInlining = ClipInlining;
2320 Arguments::_BackgroundCompilation = BackgroundCompilation;
2321 if (TieredCompilation) {
2322 Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
2323 Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
2324 }
2325
2326 // Setup flags for mixed which is the default
2327 set_mode_flags(_mixed);
2328
2329 // Parse args structure generated from JAVA_TOOL_OPTIONS environment
2330 // variable (if present).
2331 jint result = parse_each_vm_init_arg(java_tool_options_args, &patch_mod_javabase, Flag::ENVIRON_VAR);
2332 if (result != JNI_OK) {
2333 return result;
2334 }
2335
2336 // Parse args structure generated from the command line flags.
2337 result = parse_each_vm_init_arg(cmd_line_args, &patch_mod_javabase, Flag::COMMAND_LINE);
2338 if (result != JNI_OK) {
2339 return result;
2340 }
2341
2342 // Parse args structure generated from the _JAVA_OPTIONS environment
2343 // variable (if present) (mimics classic VM)
2344 result = parse_each_vm_init_arg(java_options_args, &patch_mod_javabase, Flag::ENVIRON_VAR);
2345 if (result != JNI_OK) {
2346 return result;
2347 }
2348
2349 // Do final processing now that all arguments have been parsed
2350 result = finalize_vm_init_args(patch_mod_javabase);
2351 if (result != JNI_OK) {
2352 return result;
2353 }
2354
2355 return JNI_OK;
2356 }
2357
2358 // Checks if name in command-line argument -agent{lib,path}:name[=options]
2359 // represents a valid JDWP agent. is_path==true denotes that we
2360 // are dealing with -agentpath (case where name is a path), otherwise with
2361 // -agentlib
2362 bool valid_jdwp_agent(char *name, bool is_path) {
2363 char *_name;
2364 const char *_jdwp = "jdwp";
2365 size_t _len_jdwp, _len_prefix;
2366
2367 if (is_path) {
2368 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) {
2369 return false;
2370 }
2371
2372 _name++; // skip past last path separator
2373 _len_prefix = strlen(JNI_LIB_PREFIX);
2374
2375 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) {
2376 return false;
2377 }
2378
2379 _name += _len_prefix;
2380 _len_jdwp = strlen(_jdwp);
2381
2382 if (strncmp(_name, _jdwp, _len_jdwp) == 0) {
2383 _name += _len_jdwp;
2384 }
2385 else {
2386 return false;
2387 }
2388
2389 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) {
2390 return false;
2391 }
2392
2393 return true;
2394 }
2395
2396 if (strcmp(name, _jdwp) == 0) {
2397 return true;
2398 }
2399
2400 return false;
2401 }
2402
2403 int Arguments::process_patch_mod_option(const char* patch_mod_tail, bool* patch_mod_javabase) {
2404 // --patch-module=<module>=<file>(<pathsep><file>)*
2405 assert(patch_mod_tail != NULL, "Unexpected NULL patch-module value");
2406 // Find the equal sign between the module name and the path specification
2407 const char* module_equal = strchr(patch_mod_tail, '=');
2408 if (module_equal == NULL) {
2409 jio_fprintf(defaultStream::output_stream(), "Missing '=' in --patch-module specification\n");
2410 return JNI_ERR;
2411 } else {
2412 // Pick out the module name
2413 size_t module_len = module_equal - patch_mod_tail;
2414 char* module_name = NEW_C_HEAP_ARRAY_RETURN_NULL(char, module_len+1, mtArguments);
2415 if (module_name != NULL) {
2416 memcpy(module_name, patch_mod_tail, module_len);
2417 *(module_name + module_len) = '\0';
2418 // The path piece begins one past the module_equal sign
2419 add_patch_mod_prefix(module_name, module_equal + 1, patch_mod_javabase);
2420 FREE_C_HEAP_ARRAY(char, module_name);
2421 if (!create_numbered_property("jdk.module.patch", patch_mod_tail, patch_mod_count++)) {
2422 return JNI_ENOMEM;
2423 }
2424 } else {
2425 return JNI_ENOMEM;
2426 }
2427 }
2428 return JNI_OK;
2429 }
2430
2431 // Parse -Xss memory string parameter and convert to ThreadStackSize in K.
2432 jint Arguments::parse_xss(const JavaVMOption* option, const char* tail, intx* out_ThreadStackSize) {
2433 // The min and max sizes match the values in globals.hpp, but scaled
2434 // with K. The values have been chosen so that alignment with page
2435 // size doesn't change the max value, which makes the conversions
2436 // back and forth between Xss value and ThreadStackSize value easier.
2437 // The values have also been chosen to fit inside a 32-bit signed type.
2438 const julong min_ThreadStackSize = 0;
2439 const julong max_ThreadStackSize = 1 * M;
2440
2441 const julong min_size = min_ThreadStackSize * K;
2442 const julong max_size = max_ThreadStackSize * K;
2443
2444 assert(is_aligned(max_size, os::vm_page_size()), "Implementation assumption");
2445
2446 julong size = 0;
2447 ArgsRange errcode = parse_memory_size(tail, &size, min_size, max_size);
2448 if (errcode != arg_in_range) {
2449 bool silent = (option == NULL); // Allow testing to silence error messages
2450 if (!silent) {
2451 jio_fprintf(defaultStream::error_stream(),
2452 "Invalid thread stack size: %s\n", option->optionString);
2453 describe_range_error(errcode);
2454 }
2455 return JNI_EINVAL;
2456 }
2457
2458 // Internally track ThreadStackSize in units of 1024 bytes.
2459 const julong size_aligned = align_up(size, K);
2460 assert(size <= size_aligned,
2461 "Overflow: " JULONG_FORMAT " " JULONG_FORMAT,
2462 size, size_aligned);
2463
2464 const julong size_in_K = size_aligned / K;
2465 assert(size_in_K < (julong)max_intx,
2466 "size_in_K doesn't fit in the type of ThreadStackSize: " JULONG_FORMAT,
2467 size_in_K);
2468
2469 // Check that code expanding ThreadStackSize to a page aligned number of bytes won't overflow.
2470 const julong max_expanded = align_up(size_in_K * K, os::vm_page_size());
2471 assert(max_expanded < max_uintx && max_expanded >= size_in_K,
2472 "Expansion overflowed: " JULONG_FORMAT " " JULONG_FORMAT,
2473 max_expanded, size_in_K);
2474
2475 *out_ThreadStackSize = (intx)size_in_K;
2476
2477 return JNI_OK;
2478 }
2479
2480 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, bool* patch_mod_javabase, Flag::Flags origin) {
2481 // For match_option to return remaining or value part of option string
2482 const char* tail;
2483
2484 // iterate over arguments
2485 for (int index = 0; index < args->nOptions; index++) {
2486 bool is_absolute_path = false; // for -agentpath vs -agentlib
2487
2488 const JavaVMOption* option = args->options + index;
2489
2490 if (!match_option(option, "-Djava.class.path", &tail) &&
2491 !match_option(option, "-Dsun.java.command", &tail) &&
2492 !match_option(option, "-Dsun.java.launcher", &tail)) {
2493
2494 // add all jvm options to the jvm_args string. This string
2495 // is used later to set the java.vm.args PerfData string constant.
2496 // the -Djava.class.path and the -Dsun.java.command options are
2497 // omitted from jvm_args string as each have their own PerfData
2498 // string constant object.
2499 build_jvm_args(option->optionString);
2500 }
2501
2502 // -verbose:[class/module/gc/jni]
2503 if (match_option(option, "-verbose", &tail)) {
2504 if (!strcmp(tail, ":class") || !strcmp(tail, "")) {
2505 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, load));
2506 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, unload));
2507 } else if (!strcmp(tail, ":module")) {
2508 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, load));
2509 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, unload));
2510 } else if (!strcmp(tail, ":gc")) {
2511 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
2512 } else if (!strcmp(tail, ":jni")) {
2513 if (FLAG_SET_CMDLINE(bool, PrintJNIResolving, true) != Flag::SUCCESS) {
2514 return JNI_EINVAL;
2515 }
2516 }
2517 // -da / -ea / -disableassertions / -enableassertions
2518 // These accept an optional class/package name separated by a colon, e.g.,
2519 // -da:java.lang.Thread.
2520 } else if (match_option(option, user_assertion_options, &tail, true)) {
2521 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2522 if (*tail == '\0') {
2523 JavaAssertions::setUserClassDefault(enable);
2524 } else {
2525 assert(*tail == ':', "bogus match by match_option()");
2526 JavaAssertions::addOption(tail + 1, enable);
2527 }
2528 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions
2529 } else if (match_option(option, system_assertion_options, &tail, false)) {
2530 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2531 JavaAssertions::setSystemClassDefault(enable);
2532 // -bootclasspath:
2533 } else if (match_option(option, "-Xbootclasspath:", &tail)) {
2534 jio_fprintf(defaultStream::output_stream(),
2535 "-Xbootclasspath is no longer a supported option.\n");
2536 return JNI_EINVAL;
2537 // -bootclasspath/a:
2538 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) {
2539 Arguments::append_sysclasspath(tail);
2540 // -bootclasspath/p:
2541 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) {
2542 jio_fprintf(defaultStream::output_stream(),
2543 "-Xbootclasspath/p is no longer a supported option.\n");
2544 return JNI_EINVAL;
2545 // -Xrun
2546 } else if (match_option(option, "-Xrun", &tail)) {
2547 if (tail != NULL) {
2548 const char* pos = strchr(tail, ':');
2549 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2550 char* name = NEW_C_HEAP_ARRAY(char, len + 1, mtArguments);
2551 jio_snprintf(name, len + 1, "%s", tail);
2552
2553 char *options = NULL;
2554 if(pos != NULL) {
2555 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied.
2556 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtArguments), pos+1, len2);
2557 }
2558 #if !INCLUDE_JVMTI
2559 if (strcmp(name, "jdwp") == 0) {
2560 jio_fprintf(defaultStream::error_stream(),
2561 "Debugging agents are not supported in this VM\n");
2562 return JNI_ERR;
2563 }
2564 #endif // !INCLUDE_JVMTI
2565 add_init_library(name, options);
2566 }
2567 } else if (match_option(option, "--add-reads=", &tail)) {
2568 if (!create_numbered_property("jdk.module.addreads", tail, addreads_count++)) {
2569 return JNI_ENOMEM;
2570 }
2571 } else if (match_option(option, "--add-exports=", &tail)) {
2572 if (!create_numbered_property("jdk.module.addexports", tail, addexports_count++)) {
2573 return JNI_ENOMEM;
2574 }
2575 } else if (match_option(option, "--add-opens=", &tail)) {
2576 if (!create_numbered_property("jdk.module.addopens", tail, addopens_count++)) {
2577 return JNI_ENOMEM;
2578 }
2579 } else if (match_option(option, "--add-modules=", &tail)) {
2580 if (!create_numbered_property("jdk.module.addmods", tail, addmods_count++)) {
2581 return JNI_ENOMEM;
2582 }
2583 } else if (match_option(option, "--limit-modules=", &tail)) {
2584 if (!create_property("jdk.module.limitmods", tail, InternalProperty)) {
2585 return JNI_ENOMEM;
2586 }
2587 } else if (match_option(option, "--module-path=", &tail)) {
2588 if (!create_property("jdk.module.path", tail, ExternalProperty)) {
2589 return JNI_ENOMEM;
2590 }
2591 } else if (match_option(option, "--upgrade-module-path=", &tail)) {
2592 if (!create_property("jdk.module.upgrade.path", tail, ExternalProperty)) {
2593 return JNI_ENOMEM;
2594 }
2595 } else if (match_option(option, "--patch-module=", &tail)) {
2596 // --patch-module=<module>=<file>(<pathsep><file>)*
2597 int res = process_patch_mod_option(tail, patch_mod_javabase);
2598 if (res != JNI_OK) {
2599 return res;
2600 }
2601 } else if (match_option(option, "--illegal-access=", &tail)) {
2602 if (!create_property("jdk.module.illegalAccess", tail, ExternalProperty)) {
2603 return JNI_ENOMEM;
2604 }
2605 // -agentlib and -agentpath
2606 } else if (match_option(option, "-agentlib:", &tail) ||
2607 (is_absolute_path = match_option(option, "-agentpath:", &tail))) {
2608 if(tail != NULL) {
2609 const char* pos = strchr(tail, '=');
2610 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2611 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtArguments), tail, len);
2612 name[len] = '\0';
2613
2614 char *options = NULL;
2615 if(pos != NULL) {
2616 options = os::strdup_check_oom(pos + 1, mtArguments);
2617 }
2618 #if !INCLUDE_JVMTI
2619 if (valid_jdwp_agent(name, is_absolute_path)) {
2620 jio_fprintf(defaultStream::error_stream(),
2621 "Debugging agents are not supported in this VM\n");
2622 return JNI_ERR;
2623 }
2624 #endif // !INCLUDE_JVMTI
2625 add_init_agent(name, options, is_absolute_path);
2626 }
2627 // -javaagent
2628 } else if (match_option(option, "-javaagent:", &tail)) {
2629 #if !INCLUDE_JVMTI
2630 jio_fprintf(defaultStream::error_stream(),
2631 "Instrumentation agents are not supported in this VM\n");
2632 return JNI_ERR;
2633 #else
2634 if (tail != NULL) {
2635 size_t length = strlen(tail) + 1;
2636 char *options = NEW_C_HEAP_ARRAY(char, length, mtArguments);
2637 jio_snprintf(options, length, "%s", tail);
2638 add_init_agent("instrument", options, false);
2639 // java agents need module java.instrument
2640 if (!create_numbered_property("jdk.module.addmods", "java.instrument", addmods_count++)) {
2641 return JNI_ENOMEM;
2642 }
2643 }
2644 #endif // !INCLUDE_JVMTI
2645 // -Xnoclassgc
2646 } else if (match_option(option, "-Xnoclassgc")) {
2647 if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != Flag::SUCCESS) {
2648 return JNI_EINVAL;
2649 }
2650 // -Xconcgc
2651 } else if (match_option(option, "-Xconcgc")) {
2652 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true) != Flag::SUCCESS) {
2653 return JNI_EINVAL;
2654 }
2655 handle_extra_cms_flags("-Xconcgc uses UseConcMarkSweepGC");
2656 // -Xnoconcgc
2657 } else if (match_option(option, "-Xnoconcgc")) {
2658 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false) != Flag::SUCCESS) {
2659 return JNI_EINVAL;
2660 }
2661 handle_extra_cms_flags("-Xnoconcgc uses UseConcMarkSweepGC");
2662 // -Xbatch
2663 } else if (match_option(option, "-Xbatch")) {
2664 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
2665 return JNI_EINVAL;
2666 }
2667 // -Xmn for compatibility with other JVM vendors
2668 } else if (match_option(option, "-Xmn", &tail)) {
2669 julong long_initial_young_size = 0;
2670 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1);
2671 if (errcode != arg_in_range) {
2672 jio_fprintf(defaultStream::error_stream(),
2673 "Invalid initial young generation size: %s\n", option->optionString);
2674 describe_range_error(errcode);
2675 return JNI_EINVAL;
2676 }
2677 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
2678 return JNI_EINVAL;
2679 }
2680 if (FLAG_SET_CMDLINE(size_t, NewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
2681 return JNI_EINVAL;
2682 }
2683 // -Xms
2684 } else if (match_option(option, "-Xms", &tail)) {
2685 julong long_initial_heap_size = 0;
2686 // an initial heap size of 0 means automatically determine
2687 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0);
2688 if (errcode != arg_in_range) {
2689 jio_fprintf(defaultStream::error_stream(),
2690 "Invalid initial heap size: %s\n", option->optionString);
2691 describe_range_error(errcode);
2692 return JNI_EINVAL;
2693 }
2694 set_min_heap_size((size_t)long_initial_heap_size);
2695 // Currently the minimum size and the initial heap sizes are the same.
2696 // Can be overridden with -XX:InitialHeapSize.
2697 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, (size_t)long_initial_heap_size) != Flag::SUCCESS) {
2698 return JNI_EINVAL;
2699 }
2700 // -Xmx
2701 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) {
2702 julong long_max_heap_size = 0;
2703 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1);
2704 if (errcode != arg_in_range) {
2705 jio_fprintf(defaultStream::error_stream(),
2706 "Invalid maximum heap size: %s\n", option->optionString);
2707 describe_range_error(errcode);
2708 return JNI_EINVAL;
2709 }
2710 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, (size_t)long_max_heap_size) != Flag::SUCCESS) {
2711 return JNI_EINVAL;
2712 }
2713 // Xmaxf
2714 } else if (match_option(option, "-Xmaxf", &tail)) {
2715 char* err;
2716 int maxf = (int)(strtod(tail, &err) * 100);
2717 if (*err != '\0' || *tail == '\0') {
2718 jio_fprintf(defaultStream::error_stream(),
2719 "Bad max heap free percentage size: %s\n",
2720 option->optionString);
2721 return JNI_EINVAL;
2722 } else {
2723 if (FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf) != Flag::SUCCESS) {
2724 return JNI_EINVAL;
2725 }
2726 }
2727 // Xminf
2728 } else if (match_option(option, "-Xminf", &tail)) {
2729 char* err;
2730 int minf = (int)(strtod(tail, &err) * 100);
2731 if (*err != '\0' || *tail == '\0') {
2732 jio_fprintf(defaultStream::error_stream(),
2733 "Bad min heap free percentage size: %s\n",
2734 option->optionString);
2735 return JNI_EINVAL;
2736 } else {
2737 if (FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf) != Flag::SUCCESS) {
2738 return JNI_EINVAL;
2739 }
2740 }
2741 // -Xss
2742 } else if (match_option(option, "-Xss", &tail)) {
2743 intx value = 0;
2744 jint err = parse_xss(option, tail, &value);
2745 if (err != JNI_OK) {
2746 return err;
2747 }
2748 if (FLAG_SET_CMDLINE(intx, ThreadStackSize, value) != Flag::SUCCESS) {
2749 return JNI_EINVAL;
2750 }
2751 } else if (match_option(option, "-XX:CodeCacheExpansionSize=", &tail)) {
2752 julong long_CodeCacheExpansionSize = 0;
2753 ArgsRange errcode = parse_memory_size(tail, &long_CodeCacheExpansionSize, os::vm_page_size());
2754 if (errcode != arg_in_range) {
2755 jio_fprintf(defaultStream::error_stream(),
2756 "Invalid argument: %s. Must be at least %luK.\n", option->optionString,
2757 os::vm_page_size()/K);
2758 return JNI_EINVAL;
2759 }
2760 if (FLAG_SET_CMDLINE(uintx, CodeCacheExpansionSize, (uintx)long_CodeCacheExpansionSize) != Flag::SUCCESS) {
2761 return JNI_EINVAL;
2762 }
2763 } else if (match_option(option, "-Xmaxjitcodesize", &tail) ||
2764 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) {
2765 julong long_ReservedCodeCacheSize = 0;
2766
2767 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1);
2768 if (errcode != arg_in_range) {
2769 jio_fprintf(defaultStream::error_stream(),
2770 "Invalid maximum code cache size: %s.\n", option->optionString);
2771 return JNI_EINVAL;
2772 }
2773 if (FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != Flag::SUCCESS) {
2774 return JNI_EINVAL;
2775 }
2776 // -XX:NonNMethodCodeHeapSize=
2777 } else if (match_option(option, "-XX:NonNMethodCodeHeapSize=", &tail)) {
2778 julong long_NonNMethodCodeHeapSize = 0;
2779
2780 ArgsRange errcode = parse_memory_size(tail, &long_NonNMethodCodeHeapSize, 1);
2781 if (errcode != arg_in_range) {
2782 jio_fprintf(defaultStream::error_stream(),
2783 "Invalid maximum non-nmethod code heap size: %s.\n", option->optionString);
2784 return JNI_EINVAL;
2785 }
2786 if (FLAG_SET_CMDLINE(uintx, NonNMethodCodeHeapSize, (uintx)long_NonNMethodCodeHeapSize) != Flag::SUCCESS) {
2787 return JNI_EINVAL;
2788 }
2789 // -XX:ProfiledCodeHeapSize=
2790 } else if (match_option(option, "-XX:ProfiledCodeHeapSize=", &tail)) {
2791 julong long_ProfiledCodeHeapSize = 0;
2792
2793 ArgsRange errcode = parse_memory_size(tail, &long_ProfiledCodeHeapSize, 1);
2794 if (errcode != arg_in_range) {
2795 jio_fprintf(defaultStream::error_stream(),
2796 "Invalid maximum profiled code heap size: %s.\n", option->optionString);
2797 return JNI_EINVAL;
2798 }
2799 if (FLAG_SET_CMDLINE(uintx, ProfiledCodeHeapSize, (uintx)long_ProfiledCodeHeapSize) != Flag::SUCCESS) {
2800 return JNI_EINVAL;
2801 }
2802 // -XX:NonProfiledCodeHeapSizee=
2803 } else if (match_option(option, "-XX:NonProfiledCodeHeapSize=", &tail)) {
2804 julong long_NonProfiledCodeHeapSize = 0;
2805
2806 ArgsRange errcode = parse_memory_size(tail, &long_NonProfiledCodeHeapSize, 1);
2807 if (errcode != arg_in_range) {
2808 jio_fprintf(defaultStream::error_stream(),
2809 "Invalid maximum non-profiled code heap size: %s.\n", option->optionString);
2810 return JNI_EINVAL;
2811 }
2812 if (FLAG_SET_CMDLINE(uintx, NonProfiledCodeHeapSize, (uintx)long_NonProfiledCodeHeapSize) != Flag::SUCCESS) {
2813 return JNI_EINVAL;
2814 }
2815 // -green
2816 } else if (match_option(option, "-green")) {
2817 jio_fprintf(defaultStream::error_stream(),
2818 "Green threads support not available\n");
2819 return JNI_EINVAL;
2820 // -native
2821 } else if (match_option(option, "-native")) {
2822 // HotSpot always uses native threads, ignore silently for compatibility
2823 // -Xrs
2824 } else if (match_option(option, "-Xrs")) {
2825 // Classic/EVM option, new functionality
2826 if (FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true) != Flag::SUCCESS) {
2827 return JNI_EINVAL;
2828 }
2829 // -Xprof
2830 } else if (match_option(option, "-Xprof")) {
2831 char version[256];
2832 // Obsolete in JDK 10
2833 JDK_Version::jdk(10).to_string(version, sizeof(version));
2834 warning("Ignoring option %s; support was removed in %s", option->optionString, version);
2835 // -Xconcurrentio
2836 } else if (match_option(option, "-Xconcurrentio")) {
2837 if (FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true) != Flag::SUCCESS) {
2838 return JNI_EINVAL;
2839 }
2840 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
2841 return JNI_EINVAL;
2842 }
2843 if (FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1) != Flag::SUCCESS) {
2844 return JNI_EINVAL;
2845 }
2846 if (FLAG_SET_CMDLINE(bool, UseTLAB, false) != Flag::SUCCESS) {
2847 return JNI_EINVAL;
2848 }
2849 if (FLAG_SET_CMDLINE(size_t, NewSizeThreadIncrease, 16 * K) != Flag::SUCCESS) { // 20Kb per thread added to new generation
2850 return JNI_EINVAL;
2851 }
2852
2853 // -Xinternalversion
2854 } else if (match_option(option, "-Xinternalversion")) {
2855 jio_fprintf(defaultStream::output_stream(), "%s\n",
2856 VM_Version::internal_vm_info_string());
2857 vm_exit(0);
2858 #ifndef PRODUCT
2859 // -Xprintflags
2860 } else if (match_option(option, "-Xprintflags")) {
2861 CommandLineFlags::printFlags(tty, false);
2862 vm_exit(0);
2863 #endif
2864 // -D
2865 } else if (match_option(option, "-D", &tail)) {
2866 const char* value;
2867 if (match_option(option, "-Djava.endorsed.dirs=", &value) &&
2868 *value!= '\0' && strcmp(value, "\"\"") != 0) {
2869 // abort if -Djava.endorsed.dirs is set
2870 jio_fprintf(defaultStream::output_stream(),
2871 "-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n"
2872 "in modular form will be supported via the concept of upgradeable modules.\n", value);
2873 return JNI_EINVAL;
2874 }
2875 if (match_option(option, "-Djava.ext.dirs=", &value) &&
2876 *value != '\0' && strcmp(value, "\"\"") != 0) {
2877 // abort if -Djava.ext.dirs is set
2878 jio_fprintf(defaultStream::output_stream(),
2879 "-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value);
2880 return JNI_EINVAL;
2881 }
2882 // Check for module related properties. They must be set using the modules
2883 // options. For example: use "--add-modules=java.sql", not
2884 // "-Djdk.module.addmods=java.sql"
2885 if (is_internal_module_property(option->optionString + 2)) {
2886 needs_module_property_warning = true;
2887 continue;
2888 }
2889
2890 if (!add_property(tail)) {
2891 return JNI_ENOMEM;
2892 }
2893 // Out of the box management support
2894 if (match_option(option, "-Dcom.sun.management", &tail)) {
2895 #if INCLUDE_MANAGEMENT
2896 if (FLAG_SET_CMDLINE(bool, ManagementServer, true) != Flag::SUCCESS) {
2897 return JNI_EINVAL;
2898 }
2899 // management agent in module jdk.management.agent
2900 if (!create_numbered_property("jdk.module.addmods", "jdk.management.agent", addmods_count++)) {
2901 return JNI_ENOMEM;
2902 }
2903 #else
2904 jio_fprintf(defaultStream::output_stream(),
2905 "-Dcom.sun.management is not supported in this VM.\n");
2906 return JNI_ERR;
2907 #endif
2908 }
2909 // -Xint
2910 } else if (match_option(option, "-Xint")) {
2911 set_mode_flags(_int);
2912 // -Xmixed
2913 } else if (match_option(option, "-Xmixed")) {
2914 set_mode_flags(_mixed);
2915 // -Xcomp
2916 } else if (match_option(option, "-Xcomp")) {
2917 // for testing the compiler; turn off all flags that inhibit compilation
2918 set_mode_flags(_comp);
2919 // -Xshare:dump
2920 } else if (match_option(option, "-Xshare:dump")) {
2921 if (FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true) != Flag::SUCCESS) {
2922 return JNI_EINVAL;
2923 }
2924 set_mode_flags(_int); // Prevent compilation, which creates objects
2925 // -Xshare:on
2926 } else if (match_option(option, "-Xshare:on")) {
2927 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
2928 return JNI_EINVAL;
2929 }
2930 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
2931 return JNI_EINVAL;
2932 }
2933 // -Xshare:auto
2934 } else if (match_option(option, "-Xshare:auto")) {
2935 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
2936 return JNI_EINVAL;
2937 }
2938 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
2939 return JNI_EINVAL;
2940 }
2941 // -Xshare:off
2942 } else if (match_option(option, "-Xshare:off")) {
2943 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, false) != Flag::SUCCESS) {
2944 return JNI_EINVAL;
2945 }
2946 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
2947 return JNI_EINVAL;
2948 }
2949 // -Xverify
2950 } else if (match_option(option, "-Xverify", &tail)) {
2951 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) {
2952 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true) != Flag::SUCCESS) {
2953 return JNI_EINVAL;
2954 }
2955 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
2956 return JNI_EINVAL;
2957 }
2958 } else if (strcmp(tail, ":remote") == 0) {
2959 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
2960 return JNI_EINVAL;
2961 }
2962 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
2963 return JNI_EINVAL;
2964 }
2965 } else if (strcmp(tail, ":none") == 0) {
2966 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
2967 return JNI_EINVAL;
2968 }
2969 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false) != Flag::SUCCESS) {
2970 return JNI_EINVAL;
2971 }
2972 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) {
2973 return JNI_EINVAL;
2974 }
2975 // -Xdebug
2976 } else if (match_option(option, "-Xdebug")) {
2977 // note this flag has been used, then ignore
2978 set_xdebug_mode(true);
2979 // -Xnoagent
2980 } else if (match_option(option, "-Xnoagent")) {
2981 // For compatibility with classic. HotSpot refuses to load the old style agent.dll.
2982 } else if (match_option(option, "-Xloggc:", &tail)) {
2983 // Deprecated flag to redirect GC output to a file. -Xloggc:<filename>
2984 log_warning(gc)("-Xloggc is deprecated. Will use -Xlog:gc:%s instead.", tail);
2985 _gc_log_filename = os::strdup_check_oom(tail);
2986 } else if (match_option(option, "-Xlog", &tail)) {
2987 bool ret = false;
2988 if (strcmp(tail, ":help") == 0) {
2989 LogConfiguration::print_command_line_help(defaultStream::output_stream());
2990 vm_exit(0);
2991 } else if (strcmp(tail, ":disable") == 0) {
2992 LogConfiguration::disable_logging();
2993 ret = true;
2994 } else if (*tail == '\0') {
2995 ret = LogConfiguration::parse_command_line_arguments();
2996 assert(ret, "-Xlog without arguments should never fail to parse");
2997 } else if (*tail == ':') {
2998 ret = LogConfiguration::parse_command_line_arguments(tail + 1);
2999 }
3000 if (ret == false) {
3001 jio_fprintf(defaultStream::error_stream(),
3002 "Invalid -Xlog option '-Xlog%s'\n",
3003 tail);
3004 return JNI_EINVAL;
3005 }
3006 // JNI hooks
3007 } else if (match_option(option, "-Xcheck", &tail)) {
3008 if (!strcmp(tail, ":jni")) {
3009 #if !INCLUDE_JNI_CHECK
3010 warning("JNI CHECKING is not supported in this VM");
3011 #else
3012 CheckJNICalls = true;
3013 #endif // INCLUDE_JNI_CHECK
3014 } else if (is_bad_option(option, args->ignoreUnrecognized,
3015 "check")) {
3016 return JNI_EINVAL;
3017 }
3018 } else if (match_option(option, "vfprintf")) {
3019 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo);
3020 } else if (match_option(option, "exit")) {
3021 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo);
3022 } else if (match_option(option, "abort")) {
3023 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo);
3024 // -XX:+AggressiveHeap
3025 } else if (match_option(option, "-XX:+AggressiveHeap")) {
3026 jint result = set_aggressive_heap_flags();
3027 if (result != JNI_OK) {
3028 return result;
3029 }
3030 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure;
3031 // and the last option wins.
3032 } else if (match_option(option, "-XX:+NeverTenure")) {
3033 if (FLAG_SET_CMDLINE(bool, NeverTenure, true) != Flag::SUCCESS) {
3034 return JNI_EINVAL;
3035 }
3036 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
3037 return JNI_EINVAL;
3038 }
3039 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1) != Flag::SUCCESS) {
3040 return JNI_EINVAL;
3041 }
3042 } else if (match_option(option, "-XX:+AlwaysTenure")) {
3043 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3044 return JNI_EINVAL;
3045 }
3046 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
3047 return JNI_EINVAL;
3048 }
3049 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0) != Flag::SUCCESS) {
3050 return JNI_EINVAL;
3051 }
3052 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) {
3053 uintx max_tenuring_thresh = 0;
3054 if (!parse_uintx(tail, &max_tenuring_thresh, 0)) {
3055 jio_fprintf(defaultStream::error_stream(),
3056 "Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail);
3057 return JNI_EINVAL;
3058 }
3059
3060 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh) != Flag::SUCCESS) {
3061 return JNI_EINVAL;
3062 }
3063
3064 if (MaxTenuringThreshold == 0) {
3065 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3066 return JNI_EINVAL;
3067 }
3068 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
3069 return JNI_EINVAL;
3070 }
3071 } else {
3072 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3073 return JNI_EINVAL;
3074 }
3075 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
3076 return JNI_EINVAL;
3077 }
3078 }
3079 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) {
3080 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false) != Flag::SUCCESS) {
3081 return JNI_EINVAL;
3082 }
3083 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true) != Flag::SUCCESS) {
3084 return JNI_EINVAL;
3085 }
3086 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) {
3087 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false) != Flag::SUCCESS) {
3088 return JNI_EINVAL;
3089 }
3090 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true) != Flag::SUCCESS) {
3091 return JNI_EINVAL;
3092 }
3093 } else if (match_option(option, "-XX:+ExtendedDTraceProbes")) {
3094 #if defined(DTRACE_ENABLED)
3095 if (FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true) != Flag::SUCCESS) {
3096 return JNI_EINVAL;
3097 }
3098 if (FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true) != Flag::SUCCESS) {
3099 return JNI_EINVAL;
3100 }
3101 if (FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true) != Flag::SUCCESS) {
3102 return JNI_EINVAL;
3103 }
3104 if (FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true) != Flag::SUCCESS) {
3105 return JNI_EINVAL;
3106 }
3107 #else // defined(DTRACE_ENABLED)
3108 jio_fprintf(defaultStream::error_stream(),
3109 "ExtendedDTraceProbes flag is not applicable for this configuration\n");
3110 return JNI_EINVAL;
3111 #endif // defined(DTRACE_ENABLED)
3112 #ifdef ASSERT
3113 } else if (match_option(option, "-XX:+FullGCALot")) {
3114 if (FLAG_SET_CMDLINE(bool, FullGCALot, true) != Flag::SUCCESS) {
3115 return JNI_EINVAL;
3116 }
3117 // disable scavenge before parallel mark-compact
3118 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
3119 return JNI_EINVAL;
3120 }
3121 #endif
3122 #if !INCLUDE_MANAGEMENT
3123 } else if (match_option(option, "-XX:+ManagementServer")) {
3124 jio_fprintf(defaultStream::error_stream(),
3125 "ManagementServer is not supported in this VM.\n");
3126 return JNI_ERR;
3127 #endif // INCLUDE_MANAGEMENT
3128 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx
3129 // Skip -XX:Flags= and -XX:VMOptionsFile= since those cases have
3130 // already been handled
3131 if ((strncmp(tail, "Flags=", strlen("Flags=")) != 0) &&
3132 (strncmp(tail, "VMOptionsFile=", strlen("VMOptionsFile=")) != 0)) {
3133 if (!process_argument(tail, args->ignoreUnrecognized, origin)) {
3134 return JNI_EINVAL;
3135 }
3136 }
3137 // Unknown option
3138 } else if (is_bad_option(option, args->ignoreUnrecognized)) {
3139 return JNI_ERR;
3140 }
3141 }
3142
3143 // PrintSharedArchiveAndExit will turn on
3144 // -Xshare:on
3145 // -Xlog:class+path=info
3146 if (PrintSharedArchiveAndExit) {
3147 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
3148 return JNI_EINVAL;
3149 }
3150 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
3151 return JNI_EINVAL;
3152 }
3153 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, path));
3154 }
3155
3156 // Change the default value for flags which have different default values
3157 // when working with older JDKs.
3158 #ifdef LINUX
3159 if (JDK_Version::current().compare_major(6) <= 0 &&
3160 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) {
3161 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false);
3162 }
3163 #endif // LINUX
3164 fix_appclasspath();
3165 return JNI_OK;
3166 }
3167
3168 void Arguments::add_patch_mod_prefix(const char* module_name, const char* path, bool* patch_mod_javabase) {
3169 // For java.base check for duplicate --patch-module options being specified on the command line.
3170 // This check is only required for java.base, all other duplicate module specifications
3171 // will be checked during module system initialization. The module system initialization
3172 // will throw an ExceptionInInitializerError if this situation occurs.
3173 if (strcmp(module_name, JAVA_BASE_NAME) == 0) {
3174 if (*patch_mod_javabase) {
3175 vm_exit_during_initialization("Cannot specify " JAVA_BASE_NAME " more than once to --patch-module");
3176 } else {
3177 *patch_mod_javabase = true;
3178 }
3179 }
3180
3181 // Create GrowableArray lazily, only if --patch-module has been specified
3182 if (_patch_mod_prefix == NULL) {
3183 _patch_mod_prefix = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<ModulePatchPath*>(10, true);
3184 }
3185
3186 _patch_mod_prefix->push(new ModulePatchPath(module_name, path));
3187 }
3188
3189 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled)
3190 //
3191 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar
3192 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar".
3193 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty
3194 // path is treated as the current directory.
3195 //
3196 // This causes problems with CDS, which requires that all directories specified in the classpath
3197 // must be empty. In most cases, applications do NOT want to load classes from the current
3198 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up
3199 // scripts compatible with CDS.
3200 void Arguments::fix_appclasspath() {
3201 if (IgnoreEmptyClassPaths) {
3202 const char separator = *os::path_separator();
3203 const char* src = _java_class_path->value();
3204
3205 // skip over all the leading empty paths
3206 while (*src == separator) {
3207 src ++;
3208 }
3209
3210 char* copy = os::strdup_check_oom(src, mtArguments);
3211
3212 // trim all trailing empty paths
3213 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) {
3214 *tail = '\0';
3215 }
3216
3217 char from[3] = {separator, separator, '\0'};
3218 char to [2] = {separator, '\0'};
3219 while (StringUtils::replace_no_expand(copy, from, to) > 0) {
3220 // Keep replacing "::" -> ":" until we have no more "::" (non-windows)
3221 // Keep replacing ";;" -> ";" until we have no more ";;" (windows)
3222 }
3223
3224 _java_class_path->set_writeable_value(copy);
3225 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore
3226 }
3227 }
3228
3229 static bool has_jar_files(const char* directory) {
3230 DIR* dir = os::opendir(directory);
3231 if (dir == NULL) return false;
3232
3233 struct dirent *entry;
3234 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtArguments);
3235 bool hasJarFile = false;
3236 while (!hasJarFile && (entry = os::readdir(dir, (dirent *) dbuf)) != NULL) {
3237 const char* name = entry->d_name;
3238 const char* ext = name + strlen(name) - 4;
3239 hasJarFile = ext > name && (os::file_name_strcmp(ext, ".jar") == 0);
3240 }
3241 FREE_C_HEAP_ARRAY(char, dbuf);
3242 os::closedir(dir);
3243 return hasJarFile ;
3244 }
3245
3246 static int check_non_empty_dirs(const char* path) {
3247 const char separator = *os::path_separator();
3248 const char* const end = path + strlen(path);
3249 int nonEmptyDirs = 0;
3250 while (path < end) {
3251 const char* tmp_end = strchr(path, separator);
3252 if (tmp_end == NULL) {
3253 if (has_jar_files(path)) {
3254 nonEmptyDirs++;
3255 jio_fprintf(defaultStream::output_stream(),
3256 "Non-empty directory: %s\n", path);
3257 }
3258 path = end;
3259 } else {
3260 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1, mtArguments);
3261 memcpy(dirpath, path, tmp_end - path);
3262 dirpath[tmp_end - path] = '\0';
3263 if (has_jar_files(dirpath)) {
3264 nonEmptyDirs++;
3265 jio_fprintf(defaultStream::output_stream(),
3266 "Non-empty directory: %s\n", dirpath);
3267 }
3268 FREE_C_HEAP_ARRAY(char, dirpath);
3269 path = tmp_end + 1;
3270 }
3271 }
3272 return nonEmptyDirs;
3273 }
3274
3275 jint Arguments::finalize_vm_init_args(bool patch_mod_javabase) {
3276 // check if the default lib/endorsed directory exists; if so, error
3277 char path[JVM_MAXPATHLEN];
3278 const char* fileSep = os::file_separator();
3279 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep);
3280
3281 if (CheckEndorsedAndExtDirs) {
3282 int nonEmptyDirs = 0;
3283 // check endorsed directory
3284 nonEmptyDirs += check_non_empty_dirs(path);
3285 // check the extension directories
3286 nonEmptyDirs += check_non_empty_dirs(Arguments::get_ext_dirs());
3287 if (nonEmptyDirs > 0) {
3288 return JNI_ERR;
3289 }
3290 }
3291
3292 DIR* dir = os::opendir(path);
3293 if (dir != NULL) {
3294 jio_fprintf(defaultStream::output_stream(),
3295 "<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n"
3296 "in modular form will be supported via the concept of upgradeable modules.\n");
3297 os::closedir(dir);
3298 return JNI_ERR;
3299 }
3300
3301 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep);
3302 dir = os::opendir(path);
3303 if (dir != NULL) {
3304 jio_fprintf(defaultStream::output_stream(),
3305 "<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; "
3306 "Use -classpath instead.\n.");
3307 os::closedir(dir);
3308 return JNI_ERR;
3309 }
3310
3311 // This must be done after all arguments have been processed.
3312 // java_compiler() true means set to "NONE" or empty.
3313 if (java_compiler() && !xdebug_mode()) {
3314 // For backwards compatibility, we switch to interpreted mode if
3315 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was
3316 // not specified.
3317 set_mode_flags(_int);
3318 }
3319
3320 // CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode),
3321 // but like -Xint, leave compilation thresholds unaffected.
3322 // With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well.
3323 if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) {
3324 set_mode_flags(_int);
3325 }
3326
3327 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set
3328 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) {
3329 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold);
3330 }
3331
3332 #if !defined(COMPILER2) && !INCLUDE_JVMCI
3333 // Don't degrade server performance for footprint
3334 if (FLAG_IS_DEFAULT(UseLargePages) &&
3335 MaxHeapSize < LargePageHeapSizeThreshold) {
3336 // No need for large granularity pages w/small heaps.
3337 // Note that large pages are enabled/disabled for both the
3338 // Java heap and the code cache.
3339 FLAG_SET_DEFAULT(UseLargePages, false);
3340 }
3341
3342 #elif defined(COMPILER2)
3343 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) {
3344 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1);
3345 }
3346 #endif
3347
3348 #if !defined(COMPILER2) && !INCLUDE_JVMCI
3349 UNSUPPORTED_OPTION(ProfileInterpreter);
3350 NOT_PRODUCT(UNSUPPORTED_OPTION(TraceProfileInterpreter));
3351 #endif
3352
3353 #ifndef TIERED
3354 // Tiered compilation is undefined.
3355 UNSUPPORTED_OPTION(TieredCompilation);
3356 #endif
3357
3358 #if INCLUDE_JVMCI
3359 if (EnableJVMCI &&
3360 !create_numbered_property("jdk.module.addmods", "jdk.internal.vm.ci", addmods_count++)) {
3361 return JNI_ENOMEM;
3362 }
3363 #endif
3364
3365 // If we are running in a headless jre, force java.awt.headless property
3366 // to be true unless the property has already been set.
3367 // Also allow the OS environment variable JAVA_AWT_HEADLESS to set headless state.
3368 if (os::is_headless_jre()) {
3369 const char* headless = Arguments::get_property("java.awt.headless");
3370 if (headless == NULL) {
3371 const char *headless_env = ::getenv("JAVA_AWT_HEADLESS");
3372 if (headless_env == NULL) {
3373 if (!add_property("java.awt.headless=true")) {
3374 return JNI_ENOMEM;
3375 }
3376 } else {
3377 char buffer[256];
3378 jio_snprintf(buffer, sizeof(buffer), "java.awt.headless=%s", headless_env);
3379 if (!add_property(buffer)) {
3380 return JNI_ENOMEM;
3381 }
3382 }
3383 }
3384 }
3385
3386 if (!check_vm_args_consistency()) {
3387 return JNI_ERR;
3388 }
3389
3390 #if INCLUDE_JVMCI
3391 if (UseJVMCICompiler) {
3392 Compilation_mode = CompMode_server;
3393 }
3394 #endif
3395
3396 #if INCLUDE_CDS
3397 if (DumpSharedSpaces) {
3398 // Disable biased locking now as it interferes with the clean up of
3399 // the archived Klasses and Java string objects (at dump time only).
3400 UseBiasedLocking = false;
3401 }
3402 if (UseSharedSpaces && patch_mod_javabase) {
3403 no_shared_spaces("CDS is disabled when " JAVA_BASE_NAME " module is patched.");
3404 }
3405 #endif
3406
3407 return JNI_OK;
3408 }
3409
3410 // Helper class for controlling the lifetime of JavaVMInitArgs
3411 // objects. The contents of the JavaVMInitArgs are guaranteed to be
3412 // deleted on the destruction of the ScopedVMInitArgs object.
3413 class ScopedVMInitArgs : public StackObj {
3414 private:
3415 JavaVMInitArgs _args;
3416 char* _container_name;
3417 bool _is_set;
3418 char* _vm_options_file_arg;
3419
3420 public:
3421 ScopedVMInitArgs(const char *container_name) {
3422 _args.version = JNI_VERSION_1_2;
3423 _args.nOptions = 0;
3424 _args.options = NULL;
3425 _args.ignoreUnrecognized = false;
3426 _container_name = (char *)container_name;
3427 _is_set = false;
3428 _vm_options_file_arg = NULL;
3429 }
3430
3431 // Populates the JavaVMInitArgs object represented by this
3432 // ScopedVMInitArgs object with the arguments in options. The
3433 // allocated memory is deleted by the destructor. If this method
3434 // returns anything other than JNI_OK, then this object is in a
3435 // partially constructed state, and should be abandoned.
3436 jint set_args(GrowableArray<JavaVMOption>* options) {
3437 _is_set = true;
3438 JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL(
3439 JavaVMOption, options->length(), mtArguments);
3440 if (options_arr == NULL) {
3441 return JNI_ENOMEM;
3442 }
3443 _args.options = options_arr;
3444
3445 for (int i = 0; i < options->length(); i++) {
3446 options_arr[i] = options->at(i);
3447 options_arr[i].optionString = os::strdup(options_arr[i].optionString);
3448 if (options_arr[i].optionString == NULL) {
3449 // Rely on the destructor to do cleanup.
3450 _args.nOptions = i;
3451 return JNI_ENOMEM;
3452 }
3453 }
3454
3455 _args.nOptions = options->length();
3456 _args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions;
3457 return JNI_OK;
3458 }
3459
3460 JavaVMInitArgs* get() { return &_args; }
3461 char* container_name() { return _container_name; }
3462 bool is_set() { return _is_set; }
3463 bool found_vm_options_file_arg() { return _vm_options_file_arg != NULL; }
3464 char* vm_options_file_arg() { return _vm_options_file_arg; }
3465
3466 void set_vm_options_file_arg(const char *vm_options_file_arg) {
3467 if (_vm_options_file_arg != NULL) {
3468 os::free(_vm_options_file_arg);
3469 }
3470 _vm_options_file_arg = os::strdup_check_oom(vm_options_file_arg);
3471 }
3472
3473 ~ScopedVMInitArgs() {
3474 if (_vm_options_file_arg != NULL) {
3475 os::free(_vm_options_file_arg);
3476 }
3477 if (_args.options == NULL) return;
3478 for (int i = 0; i < _args.nOptions; i++) {
3479 os::free(_args.options[i].optionString);
3480 }
3481 FREE_C_HEAP_ARRAY(JavaVMOption, _args.options);
3482 }
3483
3484 // Insert options into this option list, to replace option at
3485 // vm_options_file_pos (-XX:VMOptionsFile)
3486 jint insert(const JavaVMInitArgs* args,
3487 const JavaVMInitArgs* args_to_insert,
3488 const int vm_options_file_pos) {
3489 assert(_args.options == NULL, "shouldn't be set yet");
3490 assert(args_to_insert->nOptions != 0, "there should be args to insert");
3491 assert(vm_options_file_pos != -1, "vm_options_file_pos should be set");
3492
3493 int length = args->nOptions + args_to_insert->nOptions - 1;
3494 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments)
3495 GrowableArray<JavaVMOption>(length, true); // Construct new option array
3496 for (int i = 0; i < args->nOptions; i++) {
3497 if (i == vm_options_file_pos) {
3498 // insert the new options starting at the same place as the
3499 // -XX:VMOptionsFile option
3500 for (int j = 0; j < args_to_insert->nOptions; j++) {
3501 options->push(args_to_insert->options[j]);
3502 }
3503 } else {
3504 options->push(args->options[i]);
3505 }
3506 }
3507 // make into options array
3508 jint result = set_args(options);
3509 delete options;
3510 return result;
3511 }
3512 };
3513
3514 jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) {
3515 return parse_options_environment_variable("_JAVA_OPTIONS", args);
3516 }
3517
3518 jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) {
3519 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args);
3520 }
3521
3522 jint Arguments::parse_options_environment_variable(const char* name,
3523 ScopedVMInitArgs* vm_args) {
3524 char *buffer = ::getenv(name);
3525
3526 // Don't check this environment variable if user has special privileges
3527 // (e.g. unix su command).
3528 if (buffer == NULL || os::have_special_privileges()) {
3529 return JNI_OK;
3530 }
3531
3532 if ((buffer = os::strdup(buffer)) == NULL) {
3533 return JNI_ENOMEM;
3534 }
3535
3536 jio_fprintf(defaultStream::error_stream(),
3537 "Picked up %s: %s\n", name, buffer);
3538
3539 int retcode = parse_options_buffer(name, buffer, strlen(buffer), vm_args);
3540
3541 os::free(buffer);
3542 return retcode;
3543 }
3544
3545 jint Arguments::parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args) {
3546 // read file into buffer
3547 int fd = ::open(file_name, O_RDONLY);
3548 if (fd < 0) {
3549 jio_fprintf(defaultStream::error_stream(),
3550 "Could not open options file '%s'\n",
3551 file_name);
3552 return JNI_ERR;
3553 }
3554
3555 struct stat stbuf;
3556 int retcode = os::stat(file_name, &stbuf);
3557 if (retcode != 0) {
3558 jio_fprintf(defaultStream::error_stream(),
3559 "Could not stat options file '%s'\n",
3560 file_name);
3561 os::close(fd);
3562 return JNI_ERR;
3563 }
3564
3565 if (stbuf.st_size == 0) {
3566 // tell caller there is no option data and that is ok
3567 os::close(fd);
3568 return JNI_OK;
3569 }
3570
3571 // '+ 1' for NULL termination even with max bytes
3572 size_t bytes_alloc = stbuf.st_size + 1;
3573
3574 char *buf = NEW_C_HEAP_ARRAY_RETURN_NULL(char, bytes_alloc, mtArguments);
3575 if (NULL == buf) {
3576 jio_fprintf(defaultStream::error_stream(),
3577 "Could not allocate read buffer for options file parse\n");
3578 os::close(fd);
3579 return JNI_ENOMEM;
3580 }
3581
3582 memset(buf, 0, bytes_alloc);
3583
3584 // Fill buffer
3585 // Use ::read() instead of os::read because os::read()
3586 // might do a thread state transition
3587 // and it is too early for that here
3588
3589 ssize_t bytes_read = ::read(fd, (void *)buf, (unsigned)bytes_alloc);
3590 os::close(fd);
3591 if (bytes_read < 0) {
3592 FREE_C_HEAP_ARRAY(char, buf);
3593 jio_fprintf(defaultStream::error_stream(),
3594 "Could not read options file '%s'\n", file_name);
3595 return JNI_ERR;
3596 }
3597
3598 if (bytes_read == 0) {
3599 // tell caller there is no option data and that is ok
3600 FREE_C_HEAP_ARRAY(char, buf);
3601 return JNI_OK;
3602 }
3603
3604 retcode = parse_options_buffer(file_name, buf, bytes_read, vm_args);
3605
3606 FREE_C_HEAP_ARRAY(char, buf);
3607 return retcode;
3608 }
3609
3610 jint Arguments::parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args) {
3611 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<JavaVMOption>(2, true); // Construct option array
3612
3613 // some pointers to help with parsing
3614 char *buffer_end = buffer + buf_len;
3615 char *opt_hd = buffer;
3616 char *wrt = buffer;
3617 char *rd = buffer;
3618
3619 // parse all options
3620 while (rd < buffer_end) {
3621 // skip leading white space from the input string
3622 while (rd < buffer_end && isspace(*rd)) {
3623 rd++;
3624 }
3625
3626 if (rd >= buffer_end) {
3627 break;
3628 }
3629
3630 // Remember this is where we found the head of the token.
3631 opt_hd = wrt;
3632
3633 // Tokens are strings of non white space characters separated
3634 // by one or more white spaces.
3635 while (rd < buffer_end && !isspace(*rd)) {
3636 if (*rd == '\'' || *rd == '"') { // handle a quoted string
3637 int quote = *rd; // matching quote to look for
3638 rd++; // don't copy open quote
3639 while (rd < buffer_end && *rd != quote) {
3640 // include everything (even spaces)
3641 // up until the close quote
3642 *wrt++ = *rd++; // copy to option string
3643 }
3644
3645 if (rd < buffer_end) {
3646 rd++; // don't copy close quote
3647 } else {
3648 // did not see closing quote
3649 jio_fprintf(defaultStream::error_stream(),
3650 "Unmatched quote in %s\n", name);
3651 delete options;
3652 return JNI_ERR;
3653 }
3654 } else {
3655 *wrt++ = *rd++; // copy to option string
3656 }
3657 }
3658
3659 // steal a white space character and set it to NULL
3660 *wrt++ = '\0';
3661 // We now have a complete token
3662
3663 JavaVMOption option;
3664 option.optionString = opt_hd;
3665 option.extraInfo = NULL;
3666
3667 options->append(option); // Fill in option
3668
3669 rd++; // Advance to next character
3670 }
3671
3672 // Fill out JavaVMInitArgs structure.
3673 jint status = vm_args->set_args(options);
3674
3675 delete options;
3676 return status;
3677 }
3678
3679 void Arguments::set_shared_spaces_flags() {
3680 if (DumpSharedSpaces) {
3681 if (FailOverToOldVerifier) {
3682 // Don't fall back to the old verifier on verification failure. If a
3683 // class fails verification with the split verifier, it might fail the
3684 // CDS runtime verifier constraint check. In that case, we don't want
3685 // to share the class. We only archive classes that pass the split verifier.
3686 FLAG_SET_DEFAULT(FailOverToOldVerifier, false);
3687 }
3688
3689 if (RequireSharedSpaces) {
3690 warning("Cannot dump shared archive while using shared archive");
3691 }
3692 UseSharedSpaces = false;
3693 #ifdef _LP64
3694 if (!UseCompressedOops || !UseCompressedClassPointers) {
3695 vm_exit_during_initialization(
3696 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL);
3697 }
3698 } else {
3699 if (!UseCompressedOops || !UseCompressedClassPointers) {
3700 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces.");
3701 }
3702 #endif
3703 }
3704 }
3705
3706 // Sharing support
3707 // Construct the path to the archive
3708 static char* get_shared_archive_path() {
3709 char *shared_archive_path;
3710 if (SharedArchiveFile == NULL) {
3711 char jvm_path[JVM_MAXPATHLEN];
3712 os::jvm_path(jvm_path, sizeof(jvm_path));
3713 char *end = strrchr(jvm_path, *os::file_separator());
3714 if (end != NULL) *end = '\0';
3715 size_t jvm_path_len = strlen(jvm_path);
3716 size_t file_sep_len = strlen(os::file_separator());
3717 const size_t len = jvm_path_len + file_sep_len + 20;
3718 shared_archive_path = NEW_C_HEAP_ARRAY(char, len, mtArguments);
3719 if (shared_archive_path != NULL) {
3720 jio_snprintf(shared_archive_path, len, "%s%sclasses.jsa",
3721 jvm_path, os::file_separator());
3722 }
3723 } else {
3724 shared_archive_path = os::strdup_check_oom(SharedArchiveFile, mtArguments);
3725 }
3726 return shared_archive_path;
3727 }
3728
3729 #ifndef PRODUCT
3730 // Determine whether LogVMOutput should be implicitly turned on.
3731 static bool use_vm_log() {
3732 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) ||
3733 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods ||
3734 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers ||
3735 PrintAssembly || TraceDeoptimization || TraceDependencies ||
3736 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) {
3737 return true;
3738 }
3739
3740 #ifdef COMPILER1
3741 if (PrintC1Statistics) {
3742 return true;
3743 }
3744 #endif // COMPILER1
3745
3746 #ifdef COMPILER2
3747 if (PrintOptoAssembly || PrintOptoStatistics) {
3748 return true;
3749 }
3750 #endif // COMPILER2
3751
3752 return false;
3753 }
3754
3755 #endif // PRODUCT
3756
3757 bool Arguments::args_contains_vm_options_file_arg(const JavaVMInitArgs* args) {
3758 for (int index = 0; index < args->nOptions; index++) {
3759 const JavaVMOption* option = args->options + index;
3760 const char* tail;
3761 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
3762 return true;
3763 }
3764 }
3765 return false;
3766 }
3767
3768 jint Arguments::insert_vm_options_file(const JavaVMInitArgs* args,
3769 const char* vm_options_file,
3770 const int vm_options_file_pos,
3771 ScopedVMInitArgs* vm_options_file_args,
3772 ScopedVMInitArgs* args_out) {
3773 jint code = parse_vm_options_file(vm_options_file, vm_options_file_args);
3774 if (code != JNI_OK) {
3775 return code;
3776 }
3777
3778 if (vm_options_file_args->get()->nOptions < 1) {
3779 return JNI_OK;
3780 }
3781
3782 if (args_contains_vm_options_file_arg(vm_options_file_args->get())) {
3783 jio_fprintf(defaultStream::error_stream(),
3784 "A VM options file may not refer to a VM options file. "
3785 "Specification of '-XX:VMOptionsFile=<file-name>' in the "
3786 "options file '%s' in options container '%s' is an error.\n",
3787 vm_options_file_args->vm_options_file_arg(),
3788 vm_options_file_args->container_name());
3789 return JNI_EINVAL;
3790 }
3791
3792 return args_out->insert(args, vm_options_file_args->get(),
3793 vm_options_file_pos);
3794 }
3795
3796 // Expand -XX:VMOptionsFile found in args_in as needed.
3797 // mod_args and args_out parameters may return values as needed.
3798 jint Arguments::expand_vm_options_as_needed(const JavaVMInitArgs* args_in,
3799 ScopedVMInitArgs* mod_args,
3800 JavaVMInitArgs** args_out) {
3801 jint code = match_special_option_and_act(args_in, mod_args);
3802 if (code != JNI_OK) {
3803 return code;
3804 }
3805
3806 if (mod_args->is_set()) {
3807 // args_in contains -XX:VMOptionsFile and mod_args contains the
3808 // original options from args_in along with the options expanded
3809 // from the VMOptionsFile. Return a short-hand to the caller.
3810 *args_out = mod_args->get();
3811 } else {
3812 *args_out = (JavaVMInitArgs *)args_in; // no changes so use args_in
3813 }
3814 return JNI_OK;
3815 }
3816
3817 jint Arguments::match_special_option_and_act(const JavaVMInitArgs* args,
3818 ScopedVMInitArgs* args_out) {
3819 // Remaining part of option string
3820 const char* tail;
3821 ScopedVMInitArgs vm_options_file_args(args_out->container_name());
3822
3823 for (int index = 0; index < args->nOptions; index++) {
3824 const JavaVMOption* option = args->options + index;
3825 if (ArgumentsExt::process_options(option)) {
3826 continue;
3827 }
3828 if (match_option(option, "-XX:Flags=", &tail)) {
3829 Arguments::set_jvm_flags_file(tail);
3830 continue;
3831 }
3832 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
3833 if (vm_options_file_args.found_vm_options_file_arg()) {
3834 jio_fprintf(defaultStream::error_stream(),
3835 "The option '%s' is already specified in the options "
3836 "container '%s' so the specification of '%s' in the "
3837 "same options container is an error.\n",
3838 vm_options_file_args.vm_options_file_arg(),
3839 vm_options_file_args.container_name(),
3840 option->optionString);
3841 return JNI_EINVAL;
3842 }
3843 vm_options_file_args.set_vm_options_file_arg(option->optionString);
3844 // If there's a VMOptionsFile, parse that
3845 jint code = insert_vm_options_file(args, tail, index,
3846 &vm_options_file_args, args_out);
3847 if (code != JNI_OK) {
3848 return code;
3849 }
3850 args_out->set_vm_options_file_arg(vm_options_file_args.vm_options_file_arg());
3851 if (args_out->is_set()) {
3852 // The VMOptions file inserted some options so switch 'args'
3853 // to the new set of options, and continue processing which
3854 // preserves "last option wins" semantics.
3855 args = args_out->get();
3856 // The first option from the VMOptionsFile replaces the
3857 // current option. So we back track to process the
3858 // replacement option.
3859 index--;
3860 }
3861 continue;
3862 }
3863 if (match_option(option, "-XX:+PrintVMOptions")) {
3864 PrintVMOptions = true;
3865 continue;
3866 }
3867 if (match_option(option, "-XX:-PrintVMOptions")) {
3868 PrintVMOptions = false;
3869 continue;
3870 }
3871 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) {
3872 IgnoreUnrecognizedVMOptions = true;
3873 continue;
3874 }
3875 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) {
3876 IgnoreUnrecognizedVMOptions = false;
3877 continue;
3878 }
3879 if (match_option(option, "-XX:+PrintFlagsInitial")) {
3880 CommandLineFlags::printFlags(tty, false);
3881 vm_exit(0);
3882 }
3883 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) {
3884 #if INCLUDE_NMT
3885 // The launcher did not setup nmt environment variable properly.
3886 if (!MemTracker::check_launcher_nmt_support(tail)) {
3887 warning("Native Memory Tracking did not setup properly, using wrong launcher?");
3888 }
3889
3890 // Verify if nmt option is valid.
3891 if (MemTracker::verify_nmt_option()) {
3892 // Late initialization, still in single-threaded mode.
3893 if (MemTracker::tracking_level() >= NMT_summary) {
3894 MemTracker::init();
3895 }
3896 } else {
3897 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL);
3898 }
3899 continue;
3900 #else
3901 jio_fprintf(defaultStream::error_stream(),
3902 "Native Memory Tracking is not supported in this VM\n");
3903 return JNI_ERR;
3904 #endif
3905 }
3906
3907 #ifndef PRODUCT
3908 if (match_option(option, "-XX:+PrintFlagsWithComments")) {
3909 CommandLineFlags::printFlags(tty, true);
3910 vm_exit(0);
3911 }
3912 #endif
3913 }
3914 return JNI_OK;
3915 }
3916
3917 static void print_options(const JavaVMInitArgs *args) {
3918 const char* tail;
3919 for (int index = 0; index < args->nOptions; index++) {
3920 const JavaVMOption *option = args->options + index;
3921 if (match_option(option, "-XX:", &tail)) {
3922 logOption(tail);
3923 }
3924 }
3925 }
3926
3927 bool Arguments::handle_deprecated_print_gc_flags() {
3928 if (PrintGC) {
3929 log_warning(gc)("-XX:+PrintGC is deprecated. Will use -Xlog:gc instead.");
3930 }
3931 if (PrintGCDetails) {
3932 log_warning(gc)("-XX:+PrintGCDetails is deprecated. Will use -Xlog:gc* instead.");
3933 }
3934
3935 if (_gc_log_filename != NULL) {
3936 // -Xloggc was used to specify a filename
3937 const char* gc_conf = PrintGCDetails ? "gc*" : "gc";
3938
3939 LogTarget(Error, logging) target;
3940 LogStream errstream(target);
3941 return LogConfiguration::parse_log_arguments(_gc_log_filename, gc_conf, NULL, NULL, &errstream);
3942 } else if (PrintGC || PrintGCDetails) {
3943 LogConfiguration::configure_stdout(LogLevel::Info, !PrintGCDetails, LOG_TAGS(gc));
3944 }
3945 return true;
3946 }
3947
3948 void Arguments::handle_extra_cms_flags(const char* msg) {
3949 SpecialFlag flag;
3950 const char *flag_name = "UseConcMarkSweepGC";
3951 if (lookup_special_flag(flag_name, flag)) {
3952 handle_aliases_and_deprecation(flag_name, /* print warning */ true);
3953 warning("%s", msg);
3954 }
3955 }
3956
3957 // Parse entry point called from JNI_CreateJavaVM
3958
3959 jint Arguments::parse(const JavaVMInitArgs* initial_cmd_args) {
3960 assert(verify_special_jvm_flags(), "deprecated and obsolete flag table inconsistent");
3961
3962 // Initialize ranges, constraints and writeables
3963 CommandLineFlagRangeList::init();
3964 CommandLineFlagConstraintList::init();
3965 CommandLineFlagWriteableList::init();
3966
3967 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed.
3968 const char* hotspotrc = ".hotspotrc";
3969 bool settings_file_specified = false;
3970 bool needs_hotspotrc_warning = false;
3971 ScopedVMInitArgs initial_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
3972 ScopedVMInitArgs initial_java_options_args("env_var='_JAVA_OPTIONS'");
3973
3974 // Pointers to current working set of containers
3975 JavaVMInitArgs* cur_cmd_args;
3976 JavaVMInitArgs* cur_java_options_args;
3977 JavaVMInitArgs* cur_java_tool_options_args;
3978
3979 // Containers for modified/expanded options
3980 ScopedVMInitArgs mod_cmd_args("cmd_line_args");
3981 ScopedVMInitArgs mod_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
3982 ScopedVMInitArgs mod_java_options_args("env_var='_JAVA_OPTIONS'");
3983
3984
3985 jint code =
3986 parse_java_tool_options_environment_variable(&initial_java_tool_options_args);
3987 if (code != JNI_OK) {
3988 return code;
3989 }
3990
3991 code = parse_java_options_environment_variable(&initial_java_options_args);
3992 if (code != JNI_OK) {
3993 return code;
3994 }
3995
3996 code = expand_vm_options_as_needed(initial_java_tool_options_args.get(),
3997 &mod_java_tool_options_args,
3998 &cur_java_tool_options_args);
3999 if (code != JNI_OK) {
4000 return code;
4001 }
4002
4003 code = expand_vm_options_as_needed(initial_cmd_args,
4004 &mod_cmd_args,
4005 &cur_cmd_args);
4006 if (code != JNI_OK) {
4007 return code;
4008 }
4009
4010 code = expand_vm_options_as_needed(initial_java_options_args.get(),
4011 &mod_java_options_args,
4012 &cur_java_options_args);
4013 if (code != JNI_OK) {
4014 return code;
4015 }
4016
4017 const char* flags_file = Arguments::get_jvm_flags_file();
4018 settings_file_specified = (flags_file != NULL);
4019
4020 if (IgnoreUnrecognizedVMOptions) {
4021 cur_cmd_args->ignoreUnrecognized = true;
4022 cur_java_tool_options_args->ignoreUnrecognized = true;
4023 cur_java_options_args->ignoreUnrecognized = true;
4024 }
4025
4026 // Parse specified settings file
4027 if (settings_file_specified) {
4028 if (!process_settings_file(flags_file, true,
4029 cur_cmd_args->ignoreUnrecognized)) {
4030 return JNI_EINVAL;
4031 }
4032 } else {
4033 #ifdef ASSERT
4034 // Parse default .hotspotrc settings file
4035 if (!process_settings_file(".hotspotrc", false,
4036 cur_cmd_args->ignoreUnrecognized)) {
4037 return JNI_EINVAL;
4038 }
4039 #else
4040 struct stat buf;
4041 if (os::stat(hotspotrc, &buf) == 0) {
4042 needs_hotspotrc_warning = true;
4043 }
4044 #endif
4045 }
4046
4047 if (PrintVMOptions) {
4048 print_options(cur_java_tool_options_args);
4049 print_options(cur_cmd_args);
4050 print_options(cur_java_options_args);
4051 }
4052
4053 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS
4054 jint result = parse_vm_init_args(cur_java_tool_options_args,
4055 cur_java_options_args,
4056 cur_cmd_args);
4057
4058 if (result != JNI_OK) {
4059 return result;
4060 }
4061
4062 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed.
4063 SharedArchivePath = get_shared_archive_path();
4064 if (SharedArchivePath == NULL) {
4065 return JNI_ENOMEM;
4066 }
4067
4068 // Set up VerifySharedSpaces
4069 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) {
4070 VerifySharedSpaces = true;
4071 }
4072
4073 // Delay warning until here so that we've had a chance to process
4074 // the -XX:-PrintWarnings flag
4075 if (needs_hotspotrc_warning) {
4076 warning("%s file is present but has been ignored. "
4077 "Run with -XX:Flags=%s to load the file.",
4078 hotspotrc, hotspotrc);
4079 }
4080
4081 if (needs_module_property_warning) {
4082 warning("Ignoring system property options whose names match the '-Djdk.module.*'."
4083 " names that are reserved for internal use.");
4084 }
4085
4086 #if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
4087 UNSUPPORTED_OPTION(UseLargePages);
4088 #endif
4089
4090 ArgumentsExt::report_unsupported_options();
4091
4092 #ifndef PRODUCT
4093 if (TraceBytecodesAt != 0) {
4094 TraceBytecodes = true;
4095 }
4096 if (CountCompiledCalls) {
4097 if (UseCounterDecay) {
4098 warning("UseCounterDecay disabled because CountCalls is set");
4099 UseCounterDecay = false;
4100 }
4101 }
4102 #endif // PRODUCT
4103
4104 if (ScavengeRootsInCode == 0) {
4105 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) {
4106 warning("Forcing ScavengeRootsInCode non-zero");
4107 }
4108 ScavengeRootsInCode = 1;
4109 }
4110
4111 if (!handle_deprecated_print_gc_flags()) {
4112 return JNI_EINVAL;
4113 }
4114
4115 // Set object alignment values.
4116 set_object_alignment();
4117
4118 #if !INCLUDE_CDS
4119 if (DumpSharedSpaces || RequireSharedSpaces) {
4120 jio_fprintf(defaultStream::error_stream(),
4121 "Shared spaces are not supported in this VM\n");
4122 return JNI_ERR;
4123 }
4124 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) ||
4125 log_is_enabled(Info, cds)) {
4126 warning("Shared spaces are not supported in this VM");
4127 FLAG_SET_DEFAULT(UseSharedSpaces, false);
4128 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(cds));
4129 }
4130 no_shared_spaces("CDS Disabled");
4131 #endif // INCLUDE_CDS
4132
4133 return JNI_OK;
4134 }
4135
4136 jint Arguments::apply_ergo() {
4137 // Set flags based on ergonomics.
4138 jint result = set_ergonomics_flags();
4139 if (result != JNI_OK) return result;
4140
4141 #if INCLUDE_JVMCI
4142 set_jvmci_specific_flags();
4143 #endif
4144
4145 set_shared_spaces_flags();
4146
4147 // Check the GC selections again.
4148 if (!check_gc_consistency()) {
4149 return JNI_EINVAL;
4150 }
4151
4152 if (TieredCompilation) {
4153 set_tiered_flags();
4154 } else {
4155 int max_compilation_policy_choice = 1;
4156 #ifdef COMPILER2
4157 if (is_server_compilation_mode_vm()) {
4158 max_compilation_policy_choice = 2;
4159 }
4160 #endif
4161 // Check if the policy is valid.
4162 if (CompilationPolicyChoice >= max_compilation_policy_choice) {
4163 vm_exit_during_initialization(
4164 "Incompatible compilation policy selected", NULL);
4165 }
4166 // Scale CompileThreshold
4167 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves CompileThreshold unchanged.
4168 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
4169 FLAG_SET_ERGO(intx, CompileThreshold, scaled_compile_threshold(CompileThreshold));
4170 }
4171 }
4172
4173 #ifdef COMPILER2
4174 #ifndef PRODUCT
4175 if (PrintIdealGraphLevel > 0) {
4176 FLAG_SET_ERGO(bool, PrintIdealGraph, true);
4177 }
4178 #endif
4179 #endif
4180
4181 // Set heap size based on available physical memory
4182 set_heap_size();
4183
4184 ArgumentsExt::set_gc_specific_flags();
4185
4186 // Initialize Metaspace flags and alignments
4187 Metaspace::ergo_initialize();
4188
4189 // Set bytecode rewriting flags
4190 set_bytecode_flags();
4191
4192 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled
4193 jint code = set_aggressive_opts_flags();
4194 if (code != JNI_OK) {
4195 return code;
4196 }
4197
4198 // Turn off biased locking for locking debug mode flags,
4199 // which are subtly different from each other but neither works with
4200 // biased locking
4201 if (UseHeavyMonitors
4202 #ifdef COMPILER1
4203 || !UseFastLocking
4204 #endif // COMPILER1
4205 #if INCLUDE_JVMCI
4206 || !JVMCIUseFastLocking
4207 #endif
4208 ) {
4209 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) {
4210 // flag set to true on command line; warn the user that they
4211 // can't enable biased locking here
4212 warning("Biased Locking is not supported with locking debug flags"
4213 "; ignoring UseBiasedLocking flag." );
4214 }
4215 UseBiasedLocking = false;
4216 }
4217
4218 #ifdef CC_INTERP
4219 // Clear flags not supported on zero.
4220 FLAG_SET_DEFAULT(ProfileInterpreter, false);
4221 FLAG_SET_DEFAULT(UseBiasedLocking, false);
4222 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false));
4223 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false));
4224 #endif // CC_INTERP
4225
4226 #ifdef COMPILER2
4227 if (!EliminateLocks) {
4228 EliminateNestedLocks = false;
4229 }
4230 if (!Inline) {
4231 IncrementalInline = false;
4232 }
4233 #ifndef PRODUCT
4234 if (!IncrementalInline) {
4235 AlwaysIncrementalInline = false;
4236 }
4237 #endif
4238 if (!UseTypeSpeculation && FLAG_IS_DEFAULT(TypeProfileLevel)) {
4239 // nothing to use the profiling, turn if off
4240 FLAG_SET_DEFAULT(TypeProfileLevel, 0);
4241 }
4242 #endif
4243
4244 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) {
4245 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output");
4246 DebugNonSafepoints = true;
4247 }
4248
4249 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) {
4250 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used");
4251 }
4252
4253 if (UseOnStackReplacement && !UseLoopCounter) {
4254 warning("On-stack-replacement requires loop counters; enabling loop counters");
4255 FLAG_SET_DEFAULT(UseLoopCounter, true);
4256 }
4257
4258 #ifndef PRODUCT
4259 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) {
4260 if (use_vm_log()) {
4261 LogVMOutput = true;
4262 }
4263 }
4264 #endif // PRODUCT
4265
4266 if (PrintCommandLineFlags) {
4267 CommandLineFlags::printSetFlags(tty);
4268 }
4269
4270 // Apply CPU specific policy for the BiasedLocking
4271 if (UseBiasedLocking) {
4272 if (!VM_Version::use_biased_locking() &&
4273 !(FLAG_IS_CMDLINE(UseBiasedLocking))) {
4274 UseBiasedLocking = false;
4275 }
4276 }
4277 #ifdef COMPILER2
4278 if (!UseBiasedLocking || EmitSync != 0) {
4279 UseOptoBiasInlining = false;
4280 }
4281 #endif
4282
4283 return JNI_OK;
4284 }
4285
4286 jint Arguments::adjust_after_os() {
4287 if (UseNUMA) {
4288 if (UseParallelGC || UseParallelOldGC) {
4289 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) {
4290 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M);
4291 }
4292 }
4293 // UseNUMAInterleaving is set to ON for all collectors and
4294 // platforms when UseNUMA is set to ON. NUMA-aware collectors
4295 // such as the parallel collector for Linux and Solaris will
4296 // interleave old gen and survivor spaces on top of NUMA
4297 // allocation policy for the eden space.
4298 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on
4299 // all platforms and ParallelGC on Windows will interleave all
4300 // of the heap spaces across NUMA nodes.
4301 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) {
4302 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true);
4303 }
4304 }
4305 return JNI_OK;
4306 }
4307
4308 int Arguments::PropertyList_count(SystemProperty* pl) {
4309 int count = 0;
4310 while(pl != NULL) {
4311 count++;
4312 pl = pl->next();
4313 }
4314 return count;
4315 }
4316
4317 // Return the number of readable properties.
4318 int Arguments::PropertyList_readable_count(SystemProperty* pl) {
4319 int count = 0;
4320 while(pl != NULL) {
4321 if (pl->is_readable()) {
4322 count++;
4323 }
4324 pl = pl->next();
4325 }
4326 return count;
4327 }
4328
4329 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) {
4330 assert(key != NULL, "just checking");
4331 SystemProperty* prop;
4332 for (prop = pl; prop != NULL; prop = prop->next()) {
4333 if (strcmp(key, prop->key()) == 0) return prop->value();
4334 }
4335 return NULL;
4336 }
4337
4338 // Return the value of the requested property provided that it is a readable property.
4339 const char* Arguments::PropertyList_get_readable_value(SystemProperty *pl, const char* key) {
4340 assert(key != NULL, "just checking");
4341 SystemProperty* prop;
4342 // Return the property value if the keys match and the property is not internal or
4343 // it's the special internal property "jdk.boot.class.path.append".
4344 for (prop = pl; prop != NULL; prop = prop->next()) {
4345 if (strcmp(key, prop->key()) == 0) {
4346 if (!prop->internal()) {
4347 return prop->value();
4348 } else if (strcmp(key, "jdk.boot.class.path.append") == 0) {
4349 return prop->value();
4350 } else {
4351 // Property is internal and not jdk.boot.class.path.append so return NULL.
4352 return NULL;
4353 }
4354 }
4355 }
4356 return NULL;
4357 }
4358
4359 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) {
4360 int count = 0;
4361 const char* ret_val = NULL;
4362
4363 while(pl != NULL) {
4364 if(count >= index) {
4365 ret_val = pl->key();
4366 break;
4367 }
4368 count++;
4369 pl = pl->next();
4370 }
4371
4372 return ret_val;
4373 }
4374
4375 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) {
4376 int count = 0;
4377 char* ret_val = NULL;
4378
4379 while(pl != NULL) {
4380 if(count >= index) {
4381 ret_val = pl->value();
4382 break;
4383 }
4384 count++;
4385 pl = pl->next();
4386 }
4387
4388 return ret_val;
4389 }
4390
4391 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) {
4392 SystemProperty* p = *plist;
4393 if (p == NULL) {
4394 *plist = new_p;
4395 } else {
4396 while (p->next() != NULL) {
4397 p = p->next();
4398 }
4399 p->set_next(new_p);
4400 }
4401 }
4402
4403 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v,
4404 bool writeable, bool internal) {
4405 if (plist == NULL)
4406 return;
4407
4408 SystemProperty* new_p = new SystemProperty(k, v, writeable, internal);
4409 PropertyList_add(plist, new_p);
4410 }
4411
4412 void Arguments::PropertyList_add(SystemProperty *element) {
4413 PropertyList_add(&_system_properties, element);
4414 }
4415
4416 // This add maintains unique property key in the list.
4417 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v,
4418 PropertyAppendable append, PropertyWriteable writeable,
4419 PropertyInternal internal) {
4420 if (plist == NULL)
4421 return;
4422
4423 // If property key exist then update with new value.
4424 SystemProperty* prop;
4425 for (prop = *plist; prop != NULL; prop = prop->next()) {
4426 if (strcmp(k, prop->key()) == 0) {
4427 if (append == AppendProperty) {
4428 prop->append_value(v);
4429 } else {
4430 prop->set_value(v);
4431 }
4432 return;
4433 }
4434 }
4435
4436 PropertyList_add(plist, k, v, writeable == WriteableProperty, internal == InternalProperty);
4437 }
4438
4439 // Copies src into buf, replacing "%%" with "%" and "%p" with pid
4440 // Returns true if all of the source pointed by src has been copied over to
4441 // the destination buffer pointed by buf. Otherwise, returns false.
4442 // Notes:
4443 // 1. If the length (buflen) of the destination buffer excluding the
4444 // NULL terminator character is not long enough for holding the expanded
4445 // pid characters, it also returns false instead of returning the partially
4446 // expanded one.
4447 // 2. The passed in "buflen" should be large enough to hold the null terminator.
4448 bool Arguments::copy_expand_pid(const char* src, size_t srclen,
4449 char* buf, size_t buflen) {
4450 const char* p = src;
4451 char* b = buf;
4452 const char* src_end = &src[srclen];
4453 char* buf_end = &buf[buflen - 1];
4454
4455 while (p < src_end && b < buf_end) {
4456 if (*p == '%') {
4457 switch (*(++p)) {
4458 case '%': // "%%" ==> "%"
4459 *b++ = *p++;
4460 break;
4461 case 'p': { // "%p" ==> current process id
4462 // buf_end points to the character before the last character so
4463 // that we could write '\0' to the end of the buffer.
4464 size_t buf_sz = buf_end - b + 1;
4465 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id());
4466
4467 // if jio_snprintf fails or the buffer is not long enough to hold
4468 // the expanded pid, returns false.
4469 if (ret < 0 || ret >= (int)buf_sz) {
4470 return false;
4471 } else {
4472 b += ret;
4473 assert(*b == '\0', "fail in copy_expand_pid");
4474 if (p == src_end && b == buf_end + 1) {
4475 // reach the end of the buffer.
4476 return true;
4477 }
4478 }
4479 p++;
4480 break;
4481 }
4482 default :
4483 *b++ = '%';
4484 }
4485 } else {
4486 *b++ = *p++;
4487 }
4488 }
4489 *b = '\0';
4490 return (p == src_end); // return false if not all of the source was copied
4491 }