1 /*
2 * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "classfile/classLoader.hpp"
28 #include "classfile/javaAssertions.hpp"
29 #include "classfile/moduleEntry.hpp"
30 #include "classfile/stringTable.hpp"
31 #include "classfile/symbolTable.hpp"
32 #include "gc/shared/gcArguments.hpp"
33 #include "gc/shared/gcConfig.hpp"
34 #include "logging/log.hpp"
35 #include "logging/logConfiguration.hpp"
36 #include "logging/logStream.hpp"
37 #include "logging/logTag.hpp"
38 #include "memory/allocation.inline.hpp"
39 #include "memory/filemap.hpp"
40 #include "oops/oop.inline.hpp"
41 #include "prims/jvmtiExport.hpp"
42 #include "runtime/arguments.hpp"
43 #include "runtime/flags/jvmFlag.hpp"
44 #include "runtime/flags/jvmFlagConstraintList.hpp"
45 #include "runtime/flags/jvmFlagWriteableList.hpp"
46 #include "runtime/flags/jvmFlagRangeList.hpp"
47 #include "runtime/globals_extension.hpp"
48 #include "runtime/java.hpp"
49 #include "runtime/os.inline.hpp"
50 #include "runtime/safepoint.hpp"
51 #include "runtime/safepointMechanism.hpp"
52 #include "runtime/vm_version.hpp"
53 #include "services/management.hpp"
54 #include "services/memTracker.hpp"
55 #include "utilities/align.hpp"
56 #include "utilities/defaultStream.hpp"
57 #include "utilities/macros.hpp"
58 #include "utilities/stringUtils.hpp"
59 #if INCLUDE_JFR
60 #include "jfr/jfr.hpp"
61 #endif
62
63 // Note: This is a special bug reporting site for the JVM
64 #ifdef VENDOR_URL_VM_BUG
65 # define DEFAULT_VENDOR_URL_BUG VENDOR_URL_VM_BUG
66 #else
67 # define DEFAULT_VENDOR_URL_BUG "http://bugreport.java.com/bugreport/crash.jsp"
68 #endif
69 #define DEFAULT_JAVA_LAUNCHER "generic"
70
71 char* Arguments::_jvm_flags_file = NULL;
72 char** Arguments::_jvm_flags_array = NULL;
73 int Arguments::_num_jvm_flags = 0;
74 char** Arguments::_jvm_args_array = NULL;
75 int Arguments::_num_jvm_args = 0;
76 char* Arguments::_java_command = NULL;
77 SystemProperty* Arguments::_system_properties = NULL;
78 const char* Arguments::_gc_log_filename = NULL;
79 size_t Arguments::_conservative_max_heap_alignment = 0;
80 Arguments::Mode Arguments::_mode = _mixed;
81 bool Arguments::_java_compiler = false;
82 bool Arguments::_xdebug_mode = false;
83 const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG;
84 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER;
85 int Arguments::_sun_java_launcher_pid = -1;
86 bool Arguments::_sun_java_launcher_is_altjvm = false;
87
88 // These parameters are reset in method parse_vm_init_args()
89 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
90 bool Arguments::_UseOnStackReplacement = UseOnStackReplacement;
91 bool Arguments::_BackgroundCompilation = BackgroundCompilation;
92 bool Arguments::_ClipInlining = ClipInlining;
93 intx Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
94 intx Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
95
96 bool Arguments::_enable_preview = false;
97
98 char* Arguments::SharedArchivePath = NULL;
99 char* Arguments::SharedDynamicArchivePath = NULL;
100
101 AgentLibraryList Arguments::_libraryList;
102 AgentLibraryList Arguments::_agentList;
103
104 // These are not set by the JDK's built-in launchers, but they can be set by
105 // programs that embed the JVM using JNI_CreateJavaVM. See comments around
106 // JavaVMOption in jni.h.
107 abort_hook_t Arguments::_abort_hook = NULL;
108 exit_hook_t Arguments::_exit_hook = NULL;
109 vfprintf_hook_t Arguments::_vfprintf_hook = NULL;
110
111
112 SystemProperty *Arguments::_sun_boot_library_path = NULL;
113 SystemProperty *Arguments::_java_library_path = NULL;
114 SystemProperty *Arguments::_java_home = NULL;
115 SystemProperty *Arguments::_java_class_path = NULL;
116 SystemProperty *Arguments::_jdk_boot_class_path_append = NULL;
117 SystemProperty *Arguments::_vm_info = NULL;
118
119 GrowableArray<ModulePatchPath*> *Arguments::_patch_mod_prefix = NULL;
120 PathString *Arguments::_system_boot_class_path = NULL;
121 bool Arguments::_has_jimage = false;
122
123 char* Arguments::_ext_dirs = NULL;
124
125 bool PathString::set_value(const char *value) {
126 if (_value != NULL) {
127 FreeHeap(_value);
128 }
129 _value = AllocateHeap(strlen(value)+1, mtArguments);
130 assert(_value != NULL, "Unable to allocate space for new path value");
131 if (_value != NULL) {
132 strcpy(_value, value);
133 } else {
134 // not able to allocate
135 return false;
136 }
137 return true;
138 }
139
140 void PathString::append_value(const char *value) {
141 char *sp;
142 size_t len = 0;
143 if (value != NULL) {
144 len = strlen(value);
145 if (_value != NULL) {
146 len += strlen(_value);
147 }
148 sp = AllocateHeap(len+2, mtArguments);
149 assert(sp != NULL, "Unable to allocate space for new append path value");
150 if (sp != NULL) {
151 if (_value != NULL) {
152 strcpy(sp, _value);
153 strcat(sp, os::path_separator());
154 strcat(sp, value);
155 FreeHeap(_value);
156 } else {
157 strcpy(sp, value);
158 }
159 _value = sp;
160 }
161 }
162 }
163
164 PathString::PathString(const char* value) {
165 if (value == NULL) {
166 _value = NULL;
167 } else {
168 _value = AllocateHeap(strlen(value)+1, mtArguments);
169 strcpy(_value, value);
170 }
171 }
172
173 PathString::~PathString() {
174 if (_value != NULL) {
175 FreeHeap(_value);
176 _value = NULL;
177 }
178 }
179
180 ModulePatchPath::ModulePatchPath(const char* module_name, const char* path) {
181 assert(module_name != NULL && path != NULL, "Invalid module name or path value");
182 size_t len = strlen(module_name) + 1;
183 _module_name = AllocateHeap(len, mtInternal);
184 strncpy(_module_name, module_name, len); // copy the trailing null
185 _path = new PathString(path);
186 }
187
188 ModulePatchPath::~ModulePatchPath() {
189 if (_module_name != NULL) {
190 FreeHeap(_module_name);
191 _module_name = NULL;
192 }
193 if (_path != NULL) {
194 delete _path;
195 _path = NULL;
196 }
197 }
198
199 SystemProperty::SystemProperty(const char* key, const char* value, bool writeable, bool internal) : PathString(value) {
200 if (key == NULL) {
201 _key = NULL;
202 } else {
203 _key = AllocateHeap(strlen(key)+1, mtArguments);
204 strcpy(_key, key);
205 }
206 _next = NULL;
207 _internal = internal;
208 _writeable = writeable;
209 }
210
211 AgentLibrary::AgentLibrary(const char* name, const char* options,
212 bool is_absolute_path, void* os_lib,
213 bool instrument_lib) {
214 _name = AllocateHeap(strlen(name)+1, mtArguments);
215 strcpy(_name, name);
216 if (options == NULL) {
217 _options = NULL;
218 } else {
219 _options = AllocateHeap(strlen(options)+1, mtArguments);
220 strcpy(_options, options);
221 }
222 _is_absolute_path = is_absolute_path;
223 _os_lib = os_lib;
224 _next = NULL;
225 _state = agent_invalid;
226 _is_static_lib = false;
227 _is_instrument_lib = instrument_lib;
228 }
229
230 // Check if head of 'option' matches 'name', and sets 'tail' to the remaining
231 // part of the option string.
232 static bool match_option(const JavaVMOption *option, const char* name,
233 const char** tail) {
234 size_t len = strlen(name);
235 if (strncmp(option->optionString, name, len) == 0) {
236 *tail = option->optionString + len;
237 return true;
238 } else {
239 return false;
240 }
241 }
242
243 // Check if 'option' matches 'name'. No "tail" is allowed.
244 static bool match_option(const JavaVMOption *option, const char* name) {
245 const char* tail = NULL;
246 bool result = match_option(option, name, &tail);
247 if (tail != NULL && *tail == '\0') {
248 return result;
249 } else {
250 return false;
251 }
252 }
253
254 // Return true if any of the strings in null-terminated array 'names' matches.
255 // If tail_allowed is true, then the tail must begin with a colon; otherwise,
256 // the option must match exactly.
257 static bool match_option(const JavaVMOption* option, const char** names, const char** tail,
258 bool tail_allowed) {
259 for (/* empty */; *names != NULL; ++names) {
260 if (match_option(option, *names, tail)) {
261 if (**tail == '\0' || (tail_allowed && **tail == ':')) {
262 return true;
263 }
264 }
265 }
266 return false;
267 }
268
269 #if INCLUDE_JFR
270 static bool _has_jfr_option = false; // is using JFR
271
272 // return true on failure
273 static bool match_jfr_option(const JavaVMOption** option) {
274 assert((*option)->optionString != NULL, "invariant");
275 char* tail = NULL;
276 if (match_option(*option, "-XX:StartFlightRecording", (const char**)&tail)) {
277 _has_jfr_option = true;
278 return Jfr::on_start_flight_recording_option(option, tail);
279 } else if (match_option(*option, "-XX:FlightRecorderOptions", (const char**)&tail)) {
280 _has_jfr_option = true;
281 return Jfr::on_flight_recorder_option(option, tail);
282 }
283 return false;
284 }
285
286 bool Arguments::has_jfr_option() {
287 return _has_jfr_option;
288 }
289 #endif
290
291 static void logOption(const char* opt) {
292 if (PrintVMOptions) {
293 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt);
294 }
295 }
296
297 bool needs_module_property_warning = false;
298
299 #define MODULE_PROPERTY_PREFIX "jdk.module."
300 #define MODULE_PROPERTY_PREFIX_LEN 11
301 #define ADDEXPORTS "addexports"
302 #define ADDEXPORTS_LEN 10
303 #define ADDREADS "addreads"
304 #define ADDREADS_LEN 8
305 #define ADDOPENS "addopens"
306 #define ADDOPENS_LEN 8
307 #define PATCH "patch"
308 #define PATCH_LEN 5
309 #define ADDMODS "addmods"
310 #define ADDMODS_LEN 7
311 #define LIMITMODS "limitmods"
312 #define LIMITMODS_LEN 9
313 #define PATH "path"
314 #define PATH_LEN 4
315 #define UPGRADE_PATH "upgrade.path"
316 #define UPGRADE_PATH_LEN 12
317
318 void Arguments::add_init_library(const char* name, char* options) {
319 _libraryList.add(new AgentLibrary(name, options, false, NULL));
320 }
321
322 void Arguments::add_init_agent(const char* name, char* options, bool absolute_path) {
323 _agentList.add(new AgentLibrary(name, options, absolute_path, NULL));
324 }
325
326 void Arguments::add_instrument_agent(const char* name, char* options, bool absolute_path) {
327 _agentList.add(new AgentLibrary(name, options, absolute_path, NULL, true));
328 }
329
330 // Late-binding agents not started via arguments
331 void Arguments::add_loaded_agent(AgentLibrary *agentLib) {
332 _agentList.add(agentLib);
333 }
334
335 // Return TRUE if option matches 'property', or 'property=', or 'property.'.
336 static bool matches_property_suffix(const char* option, const char* property, size_t len) {
337 return ((strncmp(option, property, len) == 0) &&
338 (option[len] == '=' || option[len] == '.' || option[len] == '\0'));
339 }
340
341 // Return true if property starts with "jdk.module." and its ensuing chars match
342 // any of the reserved module properties.
343 // property should be passed without the leading "-D".
344 bool Arguments::is_internal_module_property(const char* property) {
345 assert((strncmp(property, "-D", 2) != 0), "Unexpected leading -D");
346 if (strncmp(property, MODULE_PROPERTY_PREFIX, MODULE_PROPERTY_PREFIX_LEN) == 0) {
347 const char* property_suffix = property + MODULE_PROPERTY_PREFIX_LEN;
348 if (matches_property_suffix(property_suffix, ADDEXPORTS, ADDEXPORTS_LEN) ||
349 matches_property_suffix(property_suffix, ADDREADS, ADDREADS_LEN) ||
350 matches_property_suffix(property_suffix, ADDOPENS, ADDOPENS_LEN) ||
351 matches_property_suffix(property_suffix, PATCH, PATCH_LEN) ||
352 matches_property_suffix(property_suffix, ADDMODS, ADDMODS_LEN) ||
353 matches_property_suffix(property_suffix, LIMITMODS, LIMITMODS_LEN) ||
354 matches_property_suffix(property_suffix, PATH, PATH_LEN) ||
355 matches_property_suffix(property_suffix, UPGRADE_PATH, UPGRADE_PATH_LEN)) {
356 return true;
357 }
358 }
359 return false;
360 }
361
362 // Process java launcher properties.
363 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) {
364 // See if sun.java.launcher, sun.java.launcher.is_altjvm or
365 // sun.java.launcher.pid is defined.
366 // Must do this before setting up other system properties,
367 // as some of them may depend on launcher type.
368 for (int index = 0; index < args->nOptions; index++) {
369 const JavaVMOption* option = args->options + index;
370 const char* tail;
371
372 if (match_option(option, "-Dsun.java.launcher=", &tail)) {
373 process_java_launcher_argument(tail, option->extraInfo);
374 continue;
375 }
376 if (match_option(option, "-Dsun.java.launcher.is_altjvm=", &tail)) {
377 if (strcmp(tail, "true") == 0) {
378 _sun_java_launcher_is_altjvm = true;
379 }
380 continue;
381 }
382 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) {
383 _sun_java_launcher_pid = atoi(tail);
384 continue;
385 }
386 }
387 }
388
389 // Initialize system properties key and value.
390 void Arguments::init_system_properties() {
391
392 // Set up _system_boot_class_path which is not a property but
393 // relies heavily on argument processing and the jdk.boot.class.path.append
394 // property. It is used to store the underlying system boot class path.
395 _system_boot_class_path = new PathString(NULL);
396
397 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name",
398 "Java Virtual Machine Specification", false));
399 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false));
400 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false));
401 PropertyList_add(&_system_properties, new SystemProperty("jdk.debug", VM_Version::jdk_debug_level(), false));
402
403 // Initialize the vm.info now, but it will need updating after argument parsing.
404 _vm_info = new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true);
405
406 // Following are JVMTI agent writable properties.
407 // Properties values are set to NULL and they are
408 // os specific they are initialized in os::init_system_properties_values().
409 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true);
410 _java_library_path = new SystemProperty("java.library.path", NULL, true);
411 _java_home = new SystemProperty("java.home", NULL, true);
412 _java_class_path = new SystemProperty("java.class.path", "", true);
413 // jdk.boot.class.path.append is a non-writeable, internal property.
414 // It can only be set by either:
415 // - -Xbootclasspath/a:
416 // - AddToBootstrapClassLoaderSearch during JVMTI OnLoad phase
417 _jdk_boot_class_path_append = new SystemProperty("jdk.boot.class.path.append", "", false, true);
418
419 // Add to System Property list.
420 PropertyList_add(&_system_properties, _sun_boot_library_path);
421 PropertyList_add(&_system_properties, _java_library_path);
422 PropertyList_add(&_system_properties, _java_home);
423 PropertyList_add(&_system_properties, _java_class_path);
424 PropertyList_add(&_system_properties, _jdk_boot_class_path_append);
425 PropertyList_add(&_system_properties, _vm_info);
426
427 // Set OS specific system properties values
428 os::init_system_properties_values();
429 }
430
431 // Update/Initialize System properties after JDK version number is known
432 void Arguments::init_version_specific_system_properties() {
433 enum { bufsz = 16 };
434 char buffer[bufsz];
435 const char* spec_vendor = "Oracle Corporation";
436 uint32_t spec_version = JDK_Version::current().major_version();
437
438 jio_snprintf(buffer, bufsz, UINT32_FORMAT, spec_version);
439
440 PropertyList_add(&_system_properties,
441 new SystemProperty("java.vm.specification.vendor", spec_vendor, false));
442 PropertyList_add(&_system_properties,
443 new SystemProperty("java.vm.specification.version", buffer, false));
444 PropertyList_add(&_system_properties,
445 new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false));
446 }
447
448 /*
449 * -XX argument processing:
450 *
451 * -XX arguments are defined in several places, such as:
452 * globals.hpp, globals_<cpu>.hpp, globals_<os>.hpp, <compiler>_globals.hpp, or <gc>_globals.hpp.
453 * -XX arguments are parsed in parse_argument().
454 * -XX argument bounds checking is done in check_vm_args_consistency().
455 *
456 * Over time -XX arguments may change. There are mechanisms to handle common cases:
457 *
458 * ALIASED: An option that is simply another name for another option. This is often
459 * part of the process of deprecating a flag, but not all aliases need
460 * to be deprecated.
461 *
462 * Create an alias for an option by adding the old and new option names to the
463 * "aliased_jvm_flags" table. Delete the old variable from globals.hpp (etc).
464 *
465 * DEPRECATED: An option that is supported, but a warning is printed to let the user know that
466 * support may be removed in the future. Both regular and aliased options may be
467 * deprecated.
468 *
469 * Add a deprecation warning for an option (or alias) by adding an entry in the
470 * "special_jvm_flags" table and setting the "deprecated_in" field.
471 * Often an option "deprecated" in one major release will
472 * be made "obsolete" in the next. In this case the entry should also have its
473 * "obsolete_in" field set.
474 *
475 * OBSOLETE: An option that has been removed (and deleted from globals.hpp), but is still accepted
476 * on the command line. A warning is printed to let the user know that option might not
477 * be accepted in the future.
478 *
479 * Add an obsolete warning for an option by adding an entry in the "special_jvm_flags"
480 * table and setting the "obsolete_in" field.
481 *
482 * EXPIRED: A deprecated or obsolete option that has an "accept_until" version less than or equal
483 * to the current JDK version. The system will flatly refuse to admit the existence of
484 * the flag. This allows a flag to die automatically over JDK releases.
485 *
486 * Note that manual cleanup of expired options should be done at major JDK version upgrades:
487 * - Newly expired options should be removed from the special_jvm_flags and aliased_jvm_flags tables.
488 * - Newly obsolete or expired deprecated options should have their global variable
489 * definitions removed (from globals.hpp, etc) and related implementations removed.
490 *
491 * Recommended approach for removing options:
492 *
493 * To remove options commonly used by customers (e.g. product -XX options), use
494 * the 3-step model adding major release numbers to the deprecate, obsolete and expire columns.
495 *
496 * To remove internal options (e.g. diagnostic, experimental, develop options), use
497 * a 2-step model adding major release numbers to the obsolete and expire columns.
498 *
499 * To change the name of an option, use the alias table as well as a 2-step
500 * model adding major release numbers to the deprecate and expire columns.
501 * Think twice about aliasing commonly used customer options.
502 *
503 * There are times when it is appropriate to leave a future release number as undefined.
504 *
505 * Tests: Aliases should be tested in VMAliasOptions.java.
506 * Deprecated options should be tested in VMDeprecatedOptions.java.
507 */
508
509 // The special_jvm_flags table declares options that are being deprecated and/or obsoleted. The
510 // "deprecated_in" or "obsolete_in" fields may be set to "undefined", but not both.
511 // When the JDK version reaches 'deprecated_in' limit, the JVM will process this flag on
512 // the command-line as usual, but will issue a warning.
513 // When the JDK version reaches 'obsolete_in' limit, the JVM will continue accepting this flag on
514 // the command-line, while issuing a warning and ignoring the flag value.
515 // Once the JDK version reaches 'expired_in' limit, the JVM will flatly refuse to admit the
516 // existence of the flag.
517 //
518 // MANUAL CLEANUP ON JDK VERSION UPDATES:
519 // This table ensures that the handling of options will update automatically when the JDK
520 // version is incremented, but the source code needs to be cleanup up manually:
521 // - As "deprecated" options age into "obsolete" or "expired" options, the associated "globals"
522 // variable should be removed, as well as users of the variable.
523 // - As "deprecated" options age into "obsolete" options, move the entry into the
524 // "Obsolete Flags" section of the table.
525 // - All expired options should be removed from the table.
526 static SpecialFlag const special_jvm_flags[] = {
527 // -------------- Deprecated Flags --------------
528 // --- Non-alias flags - sorted by obsolete_in then expired_in:
529 { "MaxGCMinorPauseMillis", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() },
530 { "UseConcMarkSweepGC", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
531 { "MaxRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
532 { "MinRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
533 { "InitialRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
534 { "UseMembar", JDK_Version::jdk(10), JDK_Version::jdk(12), JDK_Version::undefined() },
535 { "CompilationPolicyChoice", JDK_Version::jdk(13), JDK_Version::jdk(14), JDK_Version::undefined() },
536 { "AllowJNIEnvProxy", JDK_Version::jdk(13), JDK_Version::jdk(14), JDK_Version::jdk(15) },
537 { "ThreadLocalHandshakes", JDK_Version::jdk(13), JDK_Version::jdk(14), JDK_Version::jdk(15) },
538 { "AllowRedefinitionToAddDeleteMethods", JDK_Version::jdk(13), JDK_Version::undefined(), JDK_Version::undefined() },
539 { "FlightRecorder", JDK_Version::jdk(13), JDK_Version::undefined(), JDK_Version::undefined() },
540 { "FieldsAllocationStyle", JDK_Version::jdk(14), JDK_Version::jdk(15), JDK_Version::jdk(16) },
541 { "CompactFields", JDK_Version::jdk(14), JDK_Version::jdk(15), JDK_Version::jdk(16) },
542 { "MonitorBound", JDK_Version::jdk(14), JDK_Version::jdk(15), JDK_Version::jdk(16) },
543
544 // --- Deprecated alias flags (see also aliased_jvm_flags) - sorted by obsolete_in then expired_in:
545 { "DefaultMaxRAMFraction", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() },
546 { "CreateMinidumpOnCrash", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
547 { "TLABStats", JDK_Version::jdk(12), JDK_Version::undefined(), JDK_Version::undefined() },
548
549 // -------------- Obsolete Flags - sorted by expired_in --------------
550 { "PermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::undefined() },
551 { "MaxPermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::undefined() },
552 { "SharedReadWriteSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() },
553 { "SharedReadOnlySize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() },
554 { "SharedMiscDataSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() },
555 { "SharedMiscCodeSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() },
556 { "FailOverToOldVerifier", JDK_Version::undefined(), JDK_Version::jdk(14), JDK_Version::jdk(15) },
557 { "BindGCTaskThreadsToCPUs", JDK_Version::undefined(), JDK_Version::jdk(14), JDK_Version::jdk(16) },
558 { "UseGCTaskAffinity", JDK_Version::undefined(), JDK_Version::jdk(14), JDK_Version::jdk(16) },
559
560 #ifdef TEST_VERIFY_SPECIAL_JVM_FLAGS
561 // These entries will generate build errors. Their purpose is to test the macros.
562 { "dep > obs", JDK_Version::jdk(9), JDK_Version::jdk(8), JDK_Version::undefined() },
563 { "dep > exp ", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(8) },
564 { "obs > exp ", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(8) },
565 { "not deprecated or obsolete", JDK_Version::undefined(), JDK_Version::undefined(), JDK_Version::jdk(9) },
566 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
567 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
568 #endif
569
570 { NULL, JDK_Version(0), JDK_Version(0) }
571 };
572
573 // Flags that are aliases for other flags.
574 typedef struct {
575 const char* alias_name;
576 const char* real_name;
577 } AliasedFlag;
578
579 static AliasedFlag const aliased_jvm_flags[] = {
580 { "DefaultMaxRAMFraction", "MaxRAMFraction" },
581 { "CreateMinidumpOnCrash", "CreateCoredumpOnCrash" },
582 { NULL, NULL}
583 };
584
585 // NOTE: A compatibility request will be necessary for each alias to be removed.
586 static AliasedLoggingFlag const aliased_logging_flags[] = {
587 { "PrintCompressedOopsMode", LogLevel::Info, true, LOG_TAGS(gc, heap, coops) },
588 { "PrintSharedSpaces", LogLevel::Info, true, LOG_TAGS(cds) },
589 { "TraceBiasedLocking", LogLevel::Info, true, LOG_TAGS(biasedlocking) },
590 { "TraceClassLoading", LogLevel::Info, true, LOG_TAGS(class, load) },
591 { "TraceClassLoadingPreorder", LogLevel::Debug, true, LOG_TAGS(class, preorder) },
592 { "TraceClassPaths", LogLevel::Info, true, LOG_TAGS(class, path) },
593 { "TraceClassResolution", LogLevel::Debug, true, LOG_TAGS(class, resolve) },
594 { "TraceClassUnloading", LogLevel::Info, true, LOG_TAGS(class, unload) },
595 { "TraceExceptions", LogLevel::Info, true, LOG_TAGS(exceptions) },
596 { "TraceLoaderConstraints", LogLevel::Info, true, LOG_TAGS(class, loader, constraints) },
597 { "TraceMonitorInflation", LogLevel::Trace, true, LOG_TAGS(monitorinflation) },
598 { "TraceSafepointCleanupTime", LogLevel::Info, true, LOG_TAGS(safepoint, cleanup) },
599 { "TraceJVMTIObjectTagging", LogLevel::Debug, true, LOG_TAGS(jvmti, objecttagging) },
600 { "TraceRedefineClasses", LogLevel::Info, false, LOG_TAGS(redefine, class) },
601 { "TraceNMethodInstalls", LogLevel::Info, true, LOG_TAGS(nmethod, install) },
602 { NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG) }
603 };
604
605 #ifndef PRODUCT
606 // These options are removed in jdk9. Remove this code for jdk10.
607 static AliasedFlag const removed_develop_logging_flags[] = {
608 { "TraceClassInitialization", "-Xlog:class+init" },
609 { "TraceClassLoaderData", "-Xlog:class+loader+data" },
610 { "TraceDefaultMethods", "-Xlog:defaultmethods=debug" },
611 { "TraceItables", "-Xlog:itables=debug" },
612 { "TraceMonitorMismatch", "-Xlog:monitormismatch=info" },
613 { "TraceSafepoint", "-Xlog:safepoint=debug" },
614 { "TraceStartupTime", "-Xlog:startuptime" },
615 { "TraceVMOperation", "-Xlog:vmoperation=debug" },
616 { "PrintVtables", "-Xlog:vtables=debug" },
617 { "VerboseVerification", "-Xlog:verification" },
618 { NULL, NULL }
619 };
620 #endif //PRODUCT
621
622 // Return true if "v" is less than "other", where "other" may be "undefined".
623 static bool version_less_than(JDK_Version v, JDK_Version other) {
624 assert(!v.is_undefined(), "must be defined");
625 if (!other.is_undefined() && v.compare(other) >= 0) {
626 return false;
627 } else {
628 return true;
629 }
630 }
631
632 static bool lookup_special_flag(const char *flag_name, SpecialFlag& flag) {
633 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
634 if ((strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
635 flag = special_jvm_flags[i];
636 return true;
637 }
638 }
639 return false;
640 }
641
642 bool Arguments::is_obsolete_flag(const char *flag_name, JDK_Version* version) {
643 assert(version != NULL, "Must provide a version buffer");
644 SpecialFlag flag;
645 if (lookup_special_flag(flag_name, flag)) {
646 if (!flag.obsolete_in.is_undefined()) {
647 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) {
648 *version = flag.obsolete_in;
649 return true;
650 }
651 }
652 }
653 return false;
654 }
655
656 int Arguments::is_deprecated_flag(const char *flag_name, JDK_Version* version) {
657 assert(version != NULL, "Must provide a version buffer");
658 SpecialFlag flag;
659 if (lookup_special_flag(flag_name, flag)) {
660 if (!flag.deprecated_in.is_undefined()) {
661 if (version_less_than(JDK_Version::current(), flag.obsolete_in) &&
662 version_less_than(JDK_Version::current(), flag.expired_in)) {
663 *version = flag.deprecated_in;
664 return 1;
665 } else {
666 return -1;
667 }
668 }
669 }
670 return 0;
671 }
672
673 #ifndef PRODUCT
674 const char* Arguments::removed_develop_logging_flag_name(const char* name){
675 for (size_t i = 0; removed_develop_logging_flags[i].alias_name != NULL; i++) {
676 const AliasedFlag& flag = removed_develop_logging_flags[i];
677 if (strcmp(flag.alias_name, name) == 0) {
678 return flag.real_name;
679 }
680 }
681 return NULL;
682 }
683 #endif // PRODUCT
684
685 const char* Arguments::real_flag_name(const char *flag_name) {
686 for (size_t i = 0; aliased_jvm_flags[i].alias_name != NULL; i++) {
687 const AliasedFlag& flag_status = aliased_jvm_flags[i];
688 if (strcmp(flag_status.alias_name, flag_name) == 0) {
689 return flag_status.real_name;
690 }
691 }
692 return flag_name;
693 }
694
695 #ifdef ASSERT
696 static bool lookup_special_flag(const char *flag_name, size_t skip_index) {
697 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
698 if ((i != skip_index) && (strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
699 return true;
700 }
701 }
702 return false;
703 }
704
705 // Verifies the correctness of the entries in the special_jvm_flags table.
706 // If there is a semantic error (i.e. a bug in the table) such as the obsoletion
707 // version being earlier than the deprecation version, then a warning is issued
708 // and verification fails - by returning false. If it is detected that the table
709 // is out of date, with respect to the current version, then a warning is issued
710 // but verification does not fail. This allows the VM to operate when the version
711 // is first updated, without needing to update all the impacted flags at the
712 // same time.
713 static bool verify_special_jvm_flags() {
714 bool success = true;
715 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
716 const SpecialFlag& flag = special_jvm_flags[i];
717 if (lookup_special_flag(flag.name, i)) {
718 warning("Duplicate special flag declaration \"%s\"", flag.name);
719 success = false;
720 }
721 if (flag.deprecated_in.is_undefined() &&
722 flag.obsolete_in.is_undefined()) {
723 warning("Special flag entry \"%s\" must declare version deprecated and/or obsoleted in.", flag.name);
724 success = false;
725 }
726
727 if (!flag.deprecated_in.is_undefined()) {
728 if (!version_less_than(flag.deprecated_in, flag.obsolete_in)) {
729 warning("Special flag entry \"%s\" must be deprecated before obsoleted.", flag.name);
730 success = false;
731 }
732
733 if (!version_less_than(flag.deprecated_in, flag.expired_in)) {
734 warning("Special flag entry \"%s\" must be deprecated before expired.", flag.name);
735 success = false;
736 }
737 }
738
739 if (!flag.obsolete_in.is_undefined()) {
740 if (!version_less_than(flag.obsolete_in, flag.expired_in)) {
741 warning("Special flag entry \"%s\" must be obsoleted before expired.", flag.name);
742 success = false;
743 }
744
745 // if flag has become obsolete it should not have a "globals" flag defined anymore.
746 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) {
747 if (JVMFlag::find_declared_flag(flag.name) != NULL) {
748 // Temporarily disable the warning: 8196739
749 // warning("Global variable for obsolete special flag entry \"%s\" should be removed", flag.name);
750 }
751 }
752 }
753
754 if (!flag.expired_in.is_undefined()) {
755 // if flag has become expired it should not have a "globals" flag defined anymore.
756 if (!version_less_than(JDK_Version::current(), flag.expired_in)) {
757 if (JVMFlag::find_declared_flag(flag.name) != NULL) {
758 // Temporarily disable the warning: 8196739
759 // warning("Global variable for expired flag entry \"%s\" should be removed", flag.name);
760 }
761 }
762 }
763
764 }
765 return success;
766 }
767 #endif
768
769 // Parses a size specification string.
770 bool Arguments::atojulong(const char *s, julong* result) {
771 julong n = 0;
772
773 // First char must be a digit. Don't allow negative numbers or leading spaces.
774 if (!isdigit(*s)) {
775 return false;
776 }
777
778 bool is_hex = (s[0] == '0' && (s[1] == 'x' || s[1] == 'X'));
779 char* remainder;
780 errno = 0;
781 n = strtoull(s, &remainder, (is_hex ? 16 : 10));
782 if (errno != 0) {
783 return false;
784 }
785
786 // Fail if no number was read at all or if the remainder contains more than a single non-digit character.
787 if (remainder == s || strlen(remainder) > 1) {
788 return false;
789 }
790
791 switch (*remainder) {
792 case 'T': case 't':
793 *result = n * G * K;
794 // Check for overflow.
795 if (*result/((julong)G * K) != n) return false;
796 return true;
797 case 'G': case 'g':
798 *result = n * G;
799 if (*result/G != n) return false;
800 return true;
801 case 'M': case 'm':
802 *result = n * M;
803 if (*result/M != n) return false;
804 return true;
805 case 'K': case 'k':
806 *result = n * K;
807 if (*result/K != n) return false;
808 return true;
809 case '\0':
810 *result = n;
811 return true;
812 default:
813 return false;
814 }
815 }
816
817 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size, julong max_size) {
818 if (size < min_size) return arg_too_small;
819 if (size > max_size) return arg_too_big;
820 return arg_in_range;
821 }
822
823 // Describe an argument out of range error
824 void Arguments::describe_range_error(ArgsRange errcode) {
825 switch(errcode) {
826 case arg_too_big:
827 jio_fprintf(defaultStream::error_stream(),
828 "The specified size exceeds the maximum "
829 "representable size.\n");
830 break;
831 case arg_too_small:
832 case arg_unreadable:
833 case arg_in_range:
834 // do nothing for now
835 break;
836 default:
837 ShouldNotReachHere();
838 }
839 }
840
841 static bool set_bool_flag(JVMFlag* flag, bool value, JVMFlag::Flags origin) {
842 if (JVMFlag::boolAtPut(flag, &value, origin) == JVMFlag::SUCCESS) {
843 return true;
844 } else {
845 return false;
846 }
847 }
848
849 static bool set_fp_numeric_flag(JVMFlag* flag, char* value, JVMFlag::Flags origin) {
850 char* end;
851 errno = 0;
852 double v = strtod(value, &end);
853 if ((errno != 0) || (*end != 0)) {
854 return false;
855 }
856
857 if (JVMFlag::doubleAtPut(flag, &v, origin) == JVMFlag::SUCCESS) {
858 return true;
859 }
860 return false;
861 }
862
863 static bool set_numeric_flag(JVMFlag* flag, char* value, JVMFlag::Flags origin) {
864 julong v;
865 int int_v;
866 intx intx_v;
867 bool is_neg = false;
868
869 if (flag == NULL) {
870 return false;
871 }
872
873 // Check the sign first since atojulong() parses only unsigned values.
874 if (*value == '-') {
875 if (!flag->is_intx() && !flag->is_int()) {
876 return false;
877 }
878 value++;
879 is_neg = true;
880 }
881 if (!Arguments::atojulong(value, &v)) {
882 return false;
883 }
884 if (flag->is_int()) {
885 int_v = (int) v;
886 if (is_neg) {
887 int_v = -int_v;
888 }
889 return JVMFlag::intAtPut(flag, &int_v, origin) == JVMFlag::SUCCESS;
890 } else if (flag->is_uint()) {
891 uint uint_v = (uint) v;
892 return JVMFlag::uintAtPut(flag, &uint_v, origin) == JVMFlag::SUCCESS;
893 } else if (flag->is_intx()) {
894 intx_v = (intx) v;
895 if (is_neg) {
896 intx_v = -intx_v;
897 }
898 return JVMFlag::intxAtPut(flag, &intx_v, origin) == JVMFlag::SUCCESS;
899 } else if (flag->is_uintx()) {
900 uintx uintx_v = (uintx) v;
901 return JVMFlag::uintxAtPut(flag, &uintx_v, origin) == JVMFlag::SUCCESS;
902 } else if (flag->is_uint64_t()) {
903 uint64_t uint64_t_v = (uint64_t) v;
904 return JVMFlag::uint64_tAtPut(flag, &uint64_t_v, origin) == JVMFlag::SUCCESS;
905 } else if (flag->is_size_t()) {
906 size_t size_t_v = (size_t) v;
907 return JVMFlag::size_tAtPut(flag, &size_t_v, origin) == JVMFlag::SUCCESS;
908 } else if (flag->is_double()) {
909 double double_v = (double) v;
910 return JVMFlag::doubleAtPut(flag, &double_v, origin) == JVMFlag::SUCCESS;
911 } else {
912 return false;
913 }
914 }
915
916 static bool set_string_flag(JVMFlag* flag, const char* value, JVMFlag::Flags origin) {
917 if (JVMFlag::ccstrAtPut(flag, &value, origin) != JVMFlag::SUCCESS) return false;
918 // Contract: JVMFlag always returns a pointer that needs freeing.
919 FREE_C_HEAP_ARRAY(char, value);
920 return true;
921 }
922
923 static bool append_to_string_flag(JVMFlag* flag, const char* new_value, JVMFlag::Flags origin) {
924 const char* old_value = "";
925 if (JVMFlag::ccstrAt(flag, &old_value) != JVMFlag::SUCCESS) return false;
926 size_t old_len = old_value != NULL ? strlen(old_value) : 0;
927 size_t new_len = strlen(new_value);
928 const char* value;
929 char* free_this_too = NULL;
930 if (old_len == 0) {
931 value = new_value;
932 } else if (new_len == 0) {
933 value = old_value;
934 } else {
935 size_t length = old_len + 1 + new_len + 1;
936 char* buf = NEW_C_HEAP_ARRAY(char, length, mtArguments);
937 // each new setting adds another LINE to the switch:
938 jio_snprintf(buf, length, "%s\n%s", old_value, new_value);
939 value = buf;
940 free_this_too = buf;
941 }
942 (void) JVMFlag::ccstrAtPut(flag, &value, origin);
943 // JVMFlag always returns a pointer that needs freeing.
944 FREE_C_HEAP_ARRAY(char, value);
945 // JVMFlag made its own copy, so I must delete my own temp. buffer.
946 FREE_C_HEAP_ARRAY(char, free_this_too);
947 return true;
948 }
949
950 const char* Arguments::handle_aliases_and_deprecation(const char* arg, bool warn) {
951 const char* real_name = real_flag_name(arg);
952 JDK_Version since = JDK_Version();
953 switch (is_deprecated_flag(arg, &since)) {
954 case -1:
955 return NULL; // obsolete or expired, don't process normally
956 case 0:
957 return real_name;
958 case 1: {
959 if (warn) {
960 char version[256];
961 since.to_string(version, sizeof(version));
962 if (real_name != arg) {
963 warning("Option %s was deprecated in version %s and will likely be removed in a future release. Use option %s instead.",
964 arg, version, real_name);
965 } else {
966 warning("Option %s was deprecated in version %s and will likely be removed in a future release.",
967 arg, version);
968 }
969 }
970 return real_name;
971 }
972 }
973 ShouldNotReachHere();
974 return NULL;
975 }
976
977 void log_deprecated_flag(const char* name, bool on, AliasedLoggingFlag alf) {
978 LogTagType tagSet[] = {alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5};
979 // Set tagset string buffer at max size of 256, large enough for any alias tagset
980 const int max_tagset_size = 256;
981 int max_tagset_len = max_tagset_size - 1;
982 char tagset_buffer[max_tagset_size];
983 tagset_buffer[0] = '\0';
984
985 // Write tag-set for aliased logging option, in string list form
986 int max_tags = sizeof(tagSet)/sizeof(tagSet[0]);
987 for (int i = 0; i < max_tags && tagSet[i] != LogTag::__NO_TAG; i++) {
988 if (i > 0) {
989 strncat(tagset_buffer, "+", max_tagset_len - strlen(tagset_buffer));
990 }
991 strncat(tagset_buffer, LogTag::name(tagSet[i]), max_tagset_len - strlen(tagset_buffer));
992 }
993 if (!alf.exactMatch) {
994 strncat(tagset_buffer, "*", max_tagset_len - strlen(tagset_buffer));
995 }
996 log_warning(arguments)("-XX:%s%s is deprecated. Will use -Xlog:%s=%s instead.",
997 (on) ? "+" : "-",
998 name,
999 tagset_buffer,
1000 (on) ? LogLevel::name(alf.level) : "off");
1001 }
1002
1003 AliasedLoggingFlag Arguments::catch_logging_aliases(const char* name, bool on){
1004 for (size_t i = 0; aliased_logging_flags[i].alias_name != NULL; i++) {
1005 const AliasedLoggingFlag& alf = aliased_logging_flags[i];
1006 if (strcmp(alf.alias_name, name) == 0) {
1007 log_deprecated_flag(name, on, alf);
1008 return alf;
1009 }
1010 }
1011 AliasedLoggingFlag a = {NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG)};
1012 return a;
1013 }
1014
1015 bool Arguments::parse_argument(const char* arg, JVMFlag::Flags origin) {
1016
1017 // range of acceptable characters spelled out for portability reasons
1018 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]"
1019 #define BUFLEN 255
1020 char name[BUFLEN+1];
1021 char dummy;
1022 const char* real_name;
1023 bool warn_if_deprecated = true;
1024
1025 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
1026 AliasedLoggingFlag alf = catch_logging_aliases(name, false);
1027 if (alf.alias_name != NULL){
1028 LogConfiguration::configure_stdout(LogLevel::Off, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
1029 return true;
1030 }
1031 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1032 if (real_name == NULL) {
1033 return false;
1034 }
1035 JVMFlag* flag = JVMFlag::find_flag(real_name);
1036 return set_bool_flag(flag, false, origin);
1037 }
1038 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
1039 AliasedLoggingFlag alf = catch_logging_aliases(name, true);
1040 if (alf.alias_name != NULL){
1041 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
1042 return true;
1043 }
1044 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1045 if (real_name == NULL) {
1046 return false;
1047 }
1048 JVMFlag* flag = JVMFlag::find_flag(real_name);
1049 return set_bool_flag(flag, true, origin);
1050 }
1051
1052 char punct;
1053 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') {
1054 const char* value = strchr(arg, '=') + 1;
1055
1056 // this scanf pattern matches both strings (handled here) and numbers (handled later))
1057 AliasedLoggingFlag alf = catch_logging_aliases(name, true);
1058 if (alf.alias_name != NULL) {
1059 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
1060 return true;
1061 }
1062 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1063 if (real_name == NULL) {
1064 return false;
1065 }
1066 JVMFlag* flag = JVMFlag::find_flag(real_name);
1067 if (flag != NULL && flag->is_ccstr()) {
1068 if (flag->ccstr_accumulates()) {
1069 return append_to_string_flag(flag, value, origin);
1070 } else {
1071 if (value[0] == '\0') {
1072 value = NULL;
1073 }
1074 return set_string_flag(flag, value, origin);
1075 }
1076 } else {
1077 warn_if_deprecated = false; // if arg is deprecated, we've already done warning...
1078 }
1079 }
1080
1081 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') {
1082 const char* value = strchr(arg, '=') + 1;
1083 // -XX:Foo:=xxx will reset the string flag to the given value.
1084 if (value[0] == '\0') {
1085 value = NULL;
1086 }
1087 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1088 if (real_name == NULL) {
1089 return false;
1090 }
1091 JVMFlag* flag = JVMFlag::find_flag(real_name);
1092 return set_string_flag(flag, value, origin);
1093 }
1094
1095 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.eE+]"
1096 #define SIGNED_NUMBER_RANGE "[-0123456789]"
1097 #define NUMBER_RANGE "[0123456789eE+-]"
1098 char value[BUFLEN + 1];
1099 char value2[BUFLEN + 1];
1100 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) {
1101 // Looks like a floating-point number -- try again with more lenient format string
1102 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) {
1103 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1104 if (real_name == NULL) {
1105 return false;
1106 }
1107 JVMFlag* flag = JVMFlag::find_flag(real_name);
1108 return set_fp_numeric_flag(flag, value, origin);
1109 }
1110 }
1111
1112 #define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]"
1113 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) {
1114 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1115 if (real_name == NULL) {
1116 return false;
1117 }
1118 JVMFlag* flag = JVMFlag::find_flag(real_name);
1119 return set_numeric_flag(flag, value, origin);
1120 }
1121
1122 return false;
1123 }
1124
1125 void Arguments::add_string(char*** bldarray, int* count, const char* arg) {
1126 assert(bldarray != NULL, "illegal argument");
1127
1128 if (arg == NULL) {
1129 return;
1130 }
1131
1132 int new_count = *count + 1;
1133
1134 // expand the array and add arg to the last element
1135 if (*bldarray == NULL) {
1136 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtArguments);
1137 } else {
1138 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtArguments);
1139 }
1140 (*bldarray)[*count] = os::strdup_check_oom(arg);
1141 *count = new_count;
1142 }
1143
1144 void Arguments::build_jvm_args(const char* arg) {
1145 add_string(&_jvm_args_array, &_num_jvm_args, arg);
1146 }
1147
1148 void Arguments::build_jvm_flags(const char* arg) {
1149 add_string(&_jvm_flags_array, &_num_jvm_flags, arg);
1150 }
1151
1152 // utility function to return a string that concatenates all
1153 // strings in a given char** array
1154 const char* Arguments::build_resource_string(char** args, int count) {
1155 if (args == NULL || count == 0) {
1156 return NULL;
1157 }
1158 size_t length = 0;
1159 for (int i = 0; i < count; i++) {
1160 length += strlen(args[i]) + 1; // add 1 for a space or NULL terminating character
1161 }
1162 char* s = NEW_RESOURCE_ARRAY(char, length);
1163 char* dst = s;
1164 for (int j = 0; j < count; j++) {
1165 size_t offset = strlen(args[j]) + 1; // add 1 for a space or NULL terminating character
1166 jio_snprintf(dst, length, "%s ", args[j]); // jio_snprintf will replace the last space character with NULL character
1167 dst += offset;
1168 length -= offset;
1169 }
1170 return (const char*) s;
1171 }
1172
1173 void Arguments::print_on(outputStream* st) {
1174 st->print_cr("VM Arguments:");
1175 if (num_jvm_flags() > 0) {
1176 st->print("jvm_flags: "); print_jvm_flags_on(st);
1177 st->cr();
1178 }
1179 if (num_jvm_args() > 0) {
1180 st->print("jvm_args: "); print_jvm_args_on(st);
1181 st->cr();
1182 }
1183 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>");
1184 if (_java_class_path != NULL) {
1185 char* path = _java_class_path->value();
1186 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path );
1187 }
1188 st->print_cr("Launcher Type: %s", _sun_java_launcher);
1189 }
1190
1191 void Arguments::print_summary_on(outputStream* st) {
1192 // Print the command line. Environment variables that are helpful for
1193 // reproducing the problem are written later in the hs_err file.
1194 // flags are from setting file
1195 if (num_jvm_flags() > 0) {
1196 st->print_raw("Settings File: ");
1197 print_jvm_flags_on(st);
1198 st->cr();
1199 }
1200 // args are the command line and environment variable arguments.
1201 st->print_raw("Command Line: ");
1202 if (num_jvm_args() > 0) {
1203 print_jvm_args_on(st);
1204 }
1205 // this is the classfile and any arguments to the java program
1206 if (java_command() != NULL) {
1207 st->print("%s", java_command());
1208 }
1209 st->cr();
1210 }
1211
1212 void Arguments::print_jvm_flags_on(outputStream* st) {
1213 if (_num_jvm_flags > 0) {
1214 for (int i=0; i < _num_jvm_flags; i++) {
1215 st->print("%s ", _jvm_flags_array[i]);
1216 }
1217 }
1218 }
1219
1220 void Arguments::print_jvm_args_on(outputStream* st) {
1221 if (_num_jvm_args > 0) {
1222 for (int i=0; i < _num_jvm_args; i++) {
1223 st->print("%s ", _jvm_args_array[i]);
1224 }
1225 }
1226 }
1227
1228 bool Arguments::process_argument(const char* arg,
1229 jboolean ignore_unrecognized,
1230 JVMFlag::Flags origin) {
1231 JDK_Version since = JDK_Version();
1232
1233 if (parse_argument(arg, origin)) {
1234 return true;
1235 }
1236
1237 // Determine if the flag has '+', '-', or '=' characters.
1238 bool has_plus_minus = (*arg == '+' || *arg == '-');
1239 const char* const argname = has_plus_minus ? arg + 1 : arg;
1240
1241 size_t arg_len;
1242 const char* equal_sign = strchr(argname, '=');
1243 if (equal_sign == NULL) {
1244 arg_len = strlen(argname);
1245 } else {
1246 arg_len = equal_sign - argname;
1247 }
1248
1249 // Only make the obsolete check for valid arguments.
1250 if (arg_len <= BUFLEN) {
1251 // Construct a string which consists only of the argument name without '+', '-', or '='.
1252 char stripped_argname[BUFLEN+1]; // +1 for '\0'
1253 jio_snprintf(stripped_argname, arg_len+1, "%s", argname); // +1 for '\0'
1254 if (is_obsolete_flag(stripped_argname, &since)) {
1255 char version[256];
1256 since.to_string(version, sizeof(version));
1257 warning("Ignoring option %s; support was removed in %s", stripped_argname, version);
1258 return true;
1259 }
1260 #ifndef PRODUCT
1261 else {
1262 const char* replacement;
1263 if ((replacement = removed_develop_logging_flag_name(stripped_argname)) != NULL){
1264 log_warning(arguments)("%s has been removed. Please use %s instead.",
1265 stripped_argname,
1266 replacement);
1267 return false;
1268 }
1269 }
1270 #endif //PRODUCT
1271 }
1272
1273 // For locked flags, report a custom error message if available.
1274 // Otherwise, report the standard unrecognized VM option.
1275 const JVMFlag* found_flag = JVMFlag::find_declared_flag((const char*)argname, arg_len);
1276 if (found_flag != NULL) {
1277 char locked_message_buf[BUFLEN];
1278 JVMFlag::MsgType msg_type = found_flag->get_locked_message(locked_message_buf, BUFLEN);
1279 if (strlen(locked_message_buf) == 0) {
1280 if (found_flag->is_bool() && !has_plus_minus) {
1281 jio_fprintf(defaultStream::error_stream(),
1282 "Missing +/- setting for VM option '%s'\n", argname);
1283 } else if (!found_flag->is_bool() && has_plus_minus) {
1284 jio_fprintf(defaultStream::error_stream(),
1285 "Unexpected +/- setting in VM option '%s'\n", argname);
1286 } else {
1287 jio_fprintf(defaultStream::error_stream(),
1288 "Improperly specified VM option '%s'\n", argname);
1289 }
1290 } else {
1291 #ifdef PRODUCT
1292 bool mismatched = ((msg_type == JVMFlag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD) ||
1293 (msg_type == JVMFlag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD));
1294 if (ignore_unrecognized && mismatched) {
1295 return true;
1296 }
1297 #endif
1298 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf);
1299 }
1300 } else {
1301 if (ignore_unrecognized) {
1302 return true;
1303 }
1304 jio_fprintf(defaultStream::error_stream(),
1305 "Unrecognized VM option '%s'\n", argname);
1306 JVMFlag* fuzzy_matched = JVMFlag::fuzzy_match((const char*)argname, arg_len, true);
1307 if (fuzzy_matched != NULL) {
1308 jio_fprintf(defaultStream::error_stream(),
1309 "Did you mean '%s%s%s'? ",
1310 (fuzzy_matched->is_bool()) ? "(+/-)" : "",
1311 fuzzy_matched->_name,
1312 (fuzzy_matched->is_bool()) ? "" : "=<value>");
1313 }
1314 }
1315
1316 // allow for commandline "commenting out" options like -XX:#+Verbose
1317 return arg[0] == '#';
1318 }
1319
1320 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) {
1321 FILE* stream = fopen(file_name, "rb");
1322 if (stream == NULL) {
1323 if (should_exist) {
1324 jio_fprintf(defaultStream::error_stream(),
1325 "Could not open settings file %s\n", file_name);
1326 return false;
1327 } else {
1328 return true;
1329 }
1330 }
1331
1332 char token[1024];
1333 int pos = 0;
1334
1335 bool in_white_space = true;
1336 bool in_comment = false;
1337 bool in_quote = false;
1338 char quote_c = 0;
1339 bool result = true;
1340
1341 int c = getc(stream);
1342 while(c != EOF && pos < (int)(sizeof(token)-1)) {
1343 if (in_white_space) {
1344 if (in_comment) {
1345 if (c == '\n') in_comment = false;
1346 } else {
1347 if (c == '#') in_comment = true;
1348 else if (!isspace(c)) {
1349 in_white_space = false;
1350 token[pos++] = c;
1351 }
1352 }
1353 } else {
1354 if (c == '\n' || (!in_quote && isspace(c))) {
1355 // token ends at newline, or at unquoted whitespace
1356 // this allows a way to include spaces in string-valued options
1357 token[pos] = '\0';
1358 logOption(token);
1359 result &= process_argument(token, ignore_unrecognized, JVMFlag::CONFIG_FILE);
1360 build_jvm_flags(token);
1361 pos = 0;
1362 in_white_space = true;
1363 in_quote = false;
1364 } else if (!in_quote && (c == '\'' || c == '"')) {
1365 in_quote = true;
1366 quote_c = c;
1367 } else if (in_quote && (c == quote_c)) {
1368 in_quote = false;
1369 } else {
1370 token[pos++] = c;
1371 }
1372 }
1373 c = getc(stream);
1374 }
1375 if (pos > 0) {
1376 token[pos] = '\0';
1377 result &= process_argument(token, ignore_unrecognized, JVMFlag::CONFIG_FILE);
1378 build_jvm_flags(token);
1379 }
1380 fclose(stream);
1381 return result;
1382 }
1383
1384 //=============================================================================================================
1385 // Parsing of properties (-D)
1386
1387 const char* Arguments::get_property(const char* key) {
1388 return PropertyList_get_value(system_properties(), key);
1389 }
1390
1391 bool Arguments::add_property(const char* prop, PropertyWriteable writeable, PropertyInternal internal) {
1392 const char* eq = strchr(prop, '=');
1393 const char* key;
1394 const char* value = "";
1395
1396 if (eq == NULL) {
1397 // property doesn't have a value, thus use passed string
1398 key = prop;
1399 } else {
1400 // property have a value, thus extract it and save to the
1401 // allocated string
1402 size_t key_len = eq - prop;
1403 char* tmp_key = AllocateHeap(key_len + 1, mtArguments);
1404
1405 jio_snprintf(tmp_key, key_len + 1, "%s", prop);
1406 key = tmp_key;
1407
1408 value = &prop[key_len + 1];
1409 }
1410
1411 if (strcmp(key, "java.compiler") == 0) {
1412 process_java_compiler_argument(value);
1413 // Record value in Arguments, but let it get passed to Java.
1414 } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 ||
1415 strcmp(key, "sun.java.launcher.pid") == 0) {
1416 // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are
1417 // private and are processed in process_sun_java_launcher_properties();
1418 // the sun.java.launcher property is passed on to the java application
1419 } else if (strcmp(key, "sun.boot.library.path") == 0) {
1420 // append is true, writable is true, internal is false
1421 PropertyList_unique_add(&_system_properties, key, value, AppendProperty,
1422 WriteableProperty, ExternalProperty);
1423 } else {
1424 if (strcmp(key, "sun.java.command") == 0) {
1425 char *old_java_command = _java_command;
1426 _java_command = os::strdup_check_oom(value, mtArguments);
1427 if (old_java_command != NULL) {
1428 os::free(old_java_command);
1429 }
1430 } else if (strcmp(key, "java.vendor.url.bug") == 0) {
1431 const char* old_java_vendor_url_bug = _java_vendor_url_bug;
1432 // save it in _java_vendor_url_bug, so JVM fatal error handler can access
1433 // its value without going through the property list or making a Java call.
1434 _java_vendor_url_bug = os::strdup_check_oom(value, mtArguments);
1435 if (old_java_vendor_url_bug != DEFAULT_VENDOR_URL_BUG) {
1436 assert(old_java_vendor_url_bug != NULL, "_java_vendor_url_bug is NULL");
1437 os::free((void *)old_java_vendor_url_bug);
1438 }
1439 }
1440
1441 // Create new property and add at the end of the list
1442 PropertyList_unique_add(&_system_properties, key, value, AddProperty, writeable, internal);
1443 }
1444
1445 if (key != prop) {
1446 // SystemProperty copy passed value, thus free previously allocated
1447 // memory
1448 FreeHeap((void *)key);
1449 }
1450
1451 return true;
1452 }
1453
1454 #if INCLUDE_CDS
1455 const char* unsupported_properties[] = { "jdk.module.limitmods",
1456 "jdk.module.upgrade.path",
1457 "jdk.module.patch.0" };
1458 const char* unsupported_options[] = { "--limit-modules",
1459 "--upgrade-module-path",
1460 "--patch-module"
1461 };
1462 void Arguments::check_unsupported_dumping_properties() {
1463 assert(DumpSharedSpaces || DynamicDumpSharedSpaces,
1464 "this function is only used with CDS dump time");
1465 assert(ARRAY_SIZE(unsupported_properties) == ARRAY_SIZE(unsupported_options), "must be");
1466 // If a vm option is found in the unsupported_options array, vm will exit with an error message.
1467 SystemProperty* sp = system_properties();
1468 while (sp != NULL) {
1469 for (uint i = 0; i < ARRAY_SIZE(unsupported_properties); i++) {
1470 if (strcmp(sp->key(), unsupported_properties[i]) == 0) {
1471 vm_exit_during_initialization(
1472 "Cannot use the following option when dumping the shared archive", unsupported_options[i]);
1473 }
1474 }
1475 sp = sp->next();
1476 }
1477
1478 // Check for an exploded module build in use with -Xshare:dump.
1479 if (!has_jimage()) {
1480 vm_exit_during_initialization("Dumping the shared archive is not supported with an exploded module build");
1481 }
1482 }
1483
1484 bool Arguments::check_unsupported_cds_runtime_properties() {
1485 assert(UseSharedSpaces, "this function is only used with -Xshare:{on,auto}");
1486 assert(ARRAY_SIZE(unsupported_properties) == ARRAY_SIZE(unsupported_options), "must be");
1487 if (ArchiveClassesAtExit != NULL) {
1488 // dynamic dumping, just return false for now.
1489 // check_unsupported_dumping_properties() will be called later to check the same set of
1490 // properties, and will exit the VM with the correct error message if the unsupported properties
1491 // are used.
1492 return false;
1493 }
1494 for (uint i = 0; i < ARRAY_SIZE(unsupported_properties); i++) {
1495 if (get_property(unsupported_properties[i]) != NULL) {
1496 if (RequireSharedSpaces) {
1497 warning("CDS is disabled when the %s option is specified.", unsupported_options[i]);
1498 }
1499 return true;
1500 }
1501 }
1502 return false;
1503 }
1504 #endif
1505
1506 //===========================================================================================================
1507 // Setting int/mixed/comp mode flags
1508
1509 void Arguments::set_mode_flags(Mode mode) {
1510 // Set up default values for all flags.
1511 // If you add a flag to any of the branches below,
1512 // add a default value for it here.
1513 set_java_compiler(false);
1514 _mode = mode;
1515
1516 // Ensure Agent_OnLoad has the correct initial values.
1517 // This may not be the final mode; mode may change later in onload phase.
1518 PropertyList_unique_add(&_system_properties, "java.vm.info",
1519 VM_Version::vm_info_string(), AddProperty, UnwriteableProperty, ExternalProperty);
1520
1521 UseInterpreter = true;
1522 UseCompiler = true;
1523 UseLoopCounter = true;
1524
1525 // Default values may be platform/compiler dependent -
1526 // use the saved values
1527 ClipInlining = Arguments::_ClipInlining;
1528 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods;
1529 UseOnStackReplacement = Arguments::_UseOnStackReplacement;
1530 BackgroundCompilation = Arguments::_BackgroundCompilation;
1531 if (TieredCompilation) {
1532 if (FLAG_IS_DEFAULT(Tier3InvokeNotifyFreqLog)) {
1533 Tier3InvokeNotifyFreqLog = Arguments::_Tier3InvokeNotifyFreqLog;
1534 }
1535 if (FLAG_IS_DEFAULT(Tier4InvocationThreshold)) {
1536 Tier4InvocationThreshold = Arguments::_Tier4InvocationThreshold;
1537 }
1538 }
1539
1540 // Change from defaults based on mode
1541 switch (mode) {
1542 default:
1543 ShouldNotReachHere();
1544 break;
1545 case _int:
1546 UseCompiler = false;
1547 UseLoopCounter = false;
1548 AlwaysCompileLoopMethods = false;
1549 UseOnStackReplacement = false;
1550 break;
1551 case _mixed:
1552 // same as default
1553 break;
1554 case _comp:
1555 UseInterpreter = false;
1556 BackgroundCompilation = false;
1557 ClipInlining = false;
1558 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more.
1559 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and
1560 // compile a level 4 (C2) and then continue executing it.
1561 if (TieredCompilation) {
1562 Tier3InvokeNotifyFreqLog = 0;
1563 Tier4InvocationThreshold = 0;
1564 }
1565 break;
1566 }
1567 }
1568
1569 // Conflict: required to use shared spaces (-Xshare:on), but
1570 // incompatible command line options were chosen.
1571 static void no_shared_spaces(const char* message) {
1572 if (RequireSharedSpaces) {
1573 jio_fprintf(defaultStream::error_stream(),
1574 "Class data sharing is inconsistent with other specified options.\n");
1575 vm_exit_during_initialization("Unable to use shared archive", message);
1576 } else {
1577 FLAG_SET_DEFAULT(UseSharedSpaces, false);
1578 }
1579 }
1580
1581 void set_object_alignment() {
1582 // Object alignment.
1583 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2");
1584 MinObjAlignmentInBytes = ObjectAlignmentInBytes;
1585 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small");
1586 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize;
1587 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect");
1588 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1;
1589
1590 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes);
1591 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize;
1592
1593 // Oop encoding heap max
1594 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes;
1595
1596 if (SurvivorAlignmentInBytes == 0) {
1597 SurvivorAlignmentInBytes = ObjectAlignmentInBytes;
1598 }
1599 }
1600
1601 size_t Arguments::max_heap_for_compressed_oops() {
1602 // Avoid sign flip.
1603 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size");
1604 // We need to fit both the NULL page and the heap into the memory budget, while
1605 // keeping alignment constraints of the heap. To guarantee the latter, as the
1606 // NULL page is located before the heap, we pad the NULL page to the conservative
1607 // maximum alignment that the GC may ever impose upon the heap.
1608 size_t displacement_due_to_null_page = align_up((size_t)os::vm_page_size(),
1609 _conservative_max_heap_alignment);
1610
1611 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page);
1612 NOT_LP64(ShouldNotReachHere(); return 0);
1613 }
1614
1615 void Arguments::set_use_compressed_oops() {
1616 #ifndef ZERO
1617 #ifdef _LP64
1618 // MaxHeapSize is not set up properly at this point, but
1619 // the only value that can override MaxHeapSize if we are
1620 // to use UseCompressedOops are InitialHeapSize and MinHeapSize.
1621 size_t max_heap_size = MAX3(MaxHeapSize, InitialHeapSize, MinHeapSize);
1622
1623 if (max_heap_size <= max_heap_for_compressed_oops()) {
1624 #if !defined(COMPILER1) || defined(TIERED)
1625 if (FLAG_IS_DEFAULT(UseCompressedOops)) {
1626 FLAG_SET_ERGO(UseCompressedOops, true);
1627 }
1628 #endif
1629 } else {
1630 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) {
1631 warning("Max heap size too large for Compressed Oops");
1632 FLAG_SET_DEFAULT(UseCompressedOops, false);
1633 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1634 }
1635 }
1636 #endif // _LP64
1637 #endif // ZERO
1638 }
1639
1640
1641 // NOTE: set_use_compressed_klass_ptrs() must be called after calling
1642 // set_use_compressed_oops().
1643 void Arguments::set_use_compressed_klass_ptrs() {
1644 #ifndef ZERO
1645 #ifdef _LP64
1646 // UseCompressedOops must be on for UseCompressedClassPointers to be on.
1647 if (!UseCompressedOops) {
1648 if (UseCompressedClassPointers) {
1649 warning("UseCompressedClassPointers requires UseCompressedOops");
1650 }
1651 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1652 } else {
1653 // Turn on UseCompressedClassPointers too
1654 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) {
1655 FLAG_SET_ERGO(UseCompressedClassPointers, true);
1656 }
1657 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs.
1658 if (UseCompressedClassPointers) {
1659 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) {
1660 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers");
1661 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1662 }
1663 }
1664 }
1665 #endif // _LP64
1666 #endif // !ZERO
1667 }
1668
1669 void Arguments::set_conservative_max_heap_alignment() {
1670 // The conservative maximum required alignment for the heap is the maximum of
1671 // the alignments imposed by several sources: any requirements from the heap
1672 // itself and the maximum page size we may run the VM with.
1673 size_t heap_alignment = GCConfig::arguments()->conservative_max_heap_alignment();
1674 _conservative_max_heap_alignment = MAX4(heap_alignment,
1675 (size_t)os::vm_allocation_granularity(),
1676 os::max_page_size(),
1677 GCArguments::compute_heap_alignment());
1678 }
1679
1680 jint Arguments::set_ergonomics_flags() {
1681 GCConfig::initialize();
1682
1683 set_conservative_max_heap_alignment();
1684
1685 #ifndef ZERO
1686 #ifdef _LP64
1687 set_use_compressed_oops();
1688
1689 // set_use_compressed_klass_ptrs() must be called after calling
1690 // set_use_compressed_oops().
1691 set_use_compressed_klass_ptrs();
1692
1693 // Also checks that certain machines are slower with compressed oops
1694 // in vm_version initialization code.
1695 #endif // _LP64
1696 #endif // !ZERO
1697
1698 return JNI_OK;
1699 }
1700
1701 julong Arguments::limit_by_allocatable_memory(julong limit) {
1702 julong max_allocatable;
1703 julong result = limit;
1704 if (os::has_allocatable_memory_limit(&max_allocatable)) {
1705 result = MIN2(result, max_allocatable / MaxVirtMemFraction);
1706 }
1707 return result;
1708 }
1709
1710 // Use static initialization to get the default before parsing
1711 static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress;
1712
1713 void Arguments::set_heap_size() {
1714 julong phys_mem;
1715
1716 // If the user specified one of these options, they
1717 // want specific memory sizing so do not limit memory
1718 // based on compressed oops addressability.
1719 // Also, memory limits will be calculated based on
1720 // available os physical memory, not our MaxRAM limit,
1721 // unless MaxRAM is also specified.
1722 bool override_coop_limit = (!FLAG_IS_DEFAULT(MaxRAMPercentage) ||
1723 !FLAG_IS_DEFAULT(MaxRAMFraction) ||
1724 !FLAG_IS_DEFAULT(MinRAMPercentage) ||
1725 !FLAG_IS_DEFAULT(MinRAMFraction) ||
1726 !FLAG_IS_DEFAULT(InitialRAMPercentage) ||
1727 !FLAG_IS_DEFAULT(InitialRAMFraction) ||
1728 !FLAG_IS_DEFAULT(MaxRAM));
1729 if (override_coop_limit) {
1730 if (FLAG_IS_DEFAULT(MaxRAM)) {
1731 phys_mem = os::physical_memory();
1732 FLAG_SET_ERGO(MaxRAM, (uint64_t)phys_mem);
1733 } else {
1734 phys_mem = (julong)MaxRAM;
1735 }
1736 } else {
1737 phys_mem = FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM)
1738 : (julong)MaxRAM;
1739 }
1740
1741
1742 // Convert deprecated flags
1743 if (FLAG_IS_DEFAULT(MaxRAMPercentage) &&
1744 !FLAG_IS_DEFAULT(MaxRAMFraction))
1745 MaxRAMPercentage = 100.0 / MaxRAMFraction;
1746
1747 if (FLAG_IS_DEFAULT(MinRAMPercentage) &&
1748 !FLAG_IS_DEFAULT(MinRAMFraction))
1749 MinRAMPercentage = 100.0 / MinRAMFraction;
1750
1751 if (FLAG_IS_DEFAULT(InitialRAMPercentage) &&
1752 !FLAG_IS_DEFAULT(InitialRAMFraction))
1753 InitialRAMPercentage = 100.0 / InitialRAMFraction;
1754
1755 // If the maximum heap size has not been set with -Xmx,
1756 // then set it as fraction of the size of physical memory,
1757 // respecting the maximum and minimum sizes of the heap.
1758 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
1759 julong reasonable_max = (julong)((phys_mem * MaxRAMPercentage) / 100);
1760 const julong reasonable_min = (julong)((phys_mem * MinRAMPercentage) / 100);
1761 if (reasonable_min < MaxHeapSize) {
1762 // Small physical memory, so use a minimum fraction of it for the heap
1763 reasonable_max = reasonable_min;
1764 } else {
1765 // Not-small physical memory, so require a heap at least
1766 // as large as MaxHeapSize
1767 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize);
1768 }
1769
1770 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) {
1771 // Limit the heap size to ErgoHeapSizeLimit
1772 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit);
1773 }
1774
1775 #ifdef _LP64
1776 if (UseCompressedOops) {
1777 // Limit the heap size to the maximum possible when using compressed oops
1778 julong max_coop_heap = (julong)max_heap_for_compressed_oops();
1779
1780 // HeapBaseMinAddress can be greater than default but not less than.
1781 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) {
1782 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) {
1783 // matches compressed oops printing flags
1784 log_debug(gc, heap, coops)("HeapBaseMinAddress must be at least " SIZE_FORMAT
1785 " (" SIZE_FORMAT "G) which is greater than value given " SIZE_FORMAT,
1786 DefaultHeapBaseMinAddress,
1787 DefaultHeapBaseMinAddress/G,
1788 HeapBaseMinAddress);
1789 FLAG_SET_ERGO(HeapBaseMinAddress, DefaultHeapBaseMinAddress);
1790 }
1791 }
1792
1793 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) {
1794 // Heap should be above HeapBaseMinAddress to get zero based compressed oops
1795 // but it should be not less than default MaxHeapSize.
1796 max_coop_heap -= HeapBaseMinAddress;
1797 }
1798
1799 // If user specified flags prioritizing os physical
1800 // memory limits, then disable compressed oops if
1801 // limits exceed max_coop_heap and UseCompressedOops
1802 // was not specified.
1803 if (reasonable_max > max_coop_heap) {
1804 if (FLAG_IS_ERGO(UseCompressedOops) && override_coop_limit) {
1805 log_info(cds)("UseCompressedOops and UseCompressedClassPointers have been disabled due to"
1806 " max heap " SIZE_FORMAT " > compressed oop heap " SIZE_FORMAT ". "
1807 "Please check the setting of MaxRAMPercentage %5.2f."
1808 ,(size_t)reasonable_max, (size_t)max_coop_heap, MaxRAMPercentage);
1809 FLAG_SET_ERGO(UseCompressedOops, false);
1810 FLAG_SET_ERGO(UseCompressedClassPointers, false);
1811 } else {
1812 reasonable_max = MIN2(reasonable_max, max_coop_heap);
1813 }
1814 }
1815 }
1816 #endif // _LP64
1817
1818 reasonable_max = limit_by_allocatable_memory(reasonable_max);
1819
1820 if (!FLAG_IS_DEFAULT(InitialHeapSize)) {
1821 // An initial heap size was specified on the command line,
1822 // so be sure that the maximum size is consistent. Done
1823 // after call to limit_by_allocatable_memory because that
1824 // method might reduce the allocation size.
1825 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize);
1826 } else if (!FLAG_IS_DEFAULT(MinHeapSize)) {
1827 reasonable_max = MAX2(reasonable_max, (julong)MinHeapSize);
1828 }
1829
1830 log_trace(gc, heap)(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max);
1831 FLAG_SET_ERGO(MaxHeapSize, (size_t)reasonable_max);
1832 }
1833
1834 // If the minimum or initial heap_size have not been set or requested to be set
1835 // ergonomically, set them accordingly.
1836 if (InitialHeapSize == 0 || MinHeapSize == 0) {
1837 julong reasonable_minimum = (julong)(OldSize + NewSize);
1838
1839 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize);
1840
1841 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum);
1842
1843 if (InitialHeapSize == 0) {
1844 julong reasonable_initial = (julong)((phys_mem * InitialRAMPercentage) / 100);
1845
1846 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)MinHeapSize);
1847 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize);
1848
1849 reasonable_initial = limit_by_allocatable_memory(reasonable_initial);
1850
1851 FLAG_SET_ERGO(InitialHeapSize, (size_t)reasonable_initial);
1852 log_trace(gc, heap)(" Initial heap size " SIZE_FORMAT, InitialHeapSize);
1853 }
1854 // If the minimum heap size has not been set (via -Xms or -XX:MinHeapSize),
1855 // synchronize with InitialHeapSize to avoid errors with the default value.
1856 if (MinHeapSize == 0) {
1857 FLAG_SET_ERGO(MinHeapSize, MIN2((size_t)reasonable_minimum, InitialHeapSize));
1858 log_trace(gc, heap)(" Minimum heap size " SIZE_FORMAT, MinHeapSize);
1859 }
1860 }
1861 }
1862
1863 // This option inspects the machine and attempts to set various
1864 // parameters to be optimal for long-running, memory allocation
1865 // intensive jobs. It is intended for machines with large
1866 // amounts of cpu and memory.
1867 jint Arguments::set_aggressive_heap_flags() {
1868 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit
1869 // VM, but we may not be able to represent the total physical memory
1870 // available (like having 8gb of memory on a box but using a 32bit VM).
1871 // Thus, we need to make sure we're using a julong for intermediate
1872 // calculations.
1873 julong initHeapSize;
1874 julong total_memory = os::physical_memory();
1875
1876 if (total_memory < (julong) 256 * M) {
1877 jio_fprintf(defaultStream::error_stream(),
1878 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n");
1879 vm_exit(1);
1880 }
1881
1882 // The heap size is half of available memory, or (at most)
1883 // all of possible memory less 160mb (leaving room for the OS
1884 // when using ISM). This is the maximum; because adaptive sizing
1885 // is turned on below, the actual space used may be smaller.
1886
1887 initHeapSize = MIN2(total_memory / (julong) 2,
1888 total_memory - (julong) 160 * M);
1889
1890 initHeapSize = limit_by_allocatable_memory(initHeapSize);
1891
1892 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
1893 if (FLAG_SET_CMDLINE(MaxHeapSize, initHeapSize) != JVMFlag::SUCCESS) {
1894 return JNI_EINVAL;
1895 }
1896 if (FLAG_SET_CMDLINE(InitialHeapSize, initHeapSize) != JVMFlag::SUCCESS) {
1897 return JNI_EINVAL;
1898 }
1899 if (FLAG_SET_CMDLINE(MinHeapSize, initHeapSize) != JVMFlag::SUCCESS) {
1900 return JNI_EINVAL;
1901 }
1902 }
1903 if (FLAG_IS_DEFAULT(NewSize)) {
1904 // Make the young generation 3/8ths of the total heap.
1905 if (FLAG_SET_CMDLINE(NewSize,
1906 ((julong) MaxHeapSize / (julong) 8) * (julong) 3) != JVMFlag::SUCCESS) {
1907 return JNI_EINVAL;
1908 }
1909 if (FLAG_SET_CMDLINE(MaxNewSize, NewSize) != JVMFlag::SUCCESS) {
1910 return JNI_EINVAL;
1911 }
1912 }
1913
1914 #if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
1915 FLAG_SET_DEFAULT(UseLargePages, true);
1916 #endif
1917
1918 // Increase some data structure sizes for efficiency
1919 if (FLAG_SET_CMDLINE(BaseFootPrintEstimate, MaxHeapSize) != JVMFlag::SUCCESS) {
1920 return JNI_EINVAL;
1921 }
1922 if (FLAG_SET_CMDLINE(ResizeTLAB, false) != JVMFlag::SUCCESS) {
1923 return JNI_EINVAL;
1924 }
1925 if (FLAG_SET_CMDLINE(TLABSize, 256 * K) != JVMFlag::SUCCESS) {
1926 return JNI_EINVAL;
1927 }
1928
1929 // See the OldPLABSize comment below, but replace 'after promotion'
1930 // with 'after copying'. YoungPLABSize is the size of the survivor
1931 // space per-gc-thread buffers. The default is 4kw.
1932 if (FLAG_SET_CMDLINE(YoungPLABSize, 256 * K) != JVMFlag::SUCCESS) { // Note: this is in words
1933 return JNI_EINVAL;
1934 }
1935
1936 // OldPLABSize is the size of the buffers in the old gen that
1937 // UseParallelGC uses to promote live data that doesn't fit in the
1938 // survivor spaces. At any given time, there's one for each gc thread.
1939 // The default size is 1kw. These buffers are rarely used, since the
1940 // survivor spaces are usually big enough. For specjbb, however, there
1941 // are occasions when there's lots of live data in the young gen
1942 // and we end up promoting some of it. We don't have a definite
1943 // explanation for why bumping OldPLABSize helps, but the theory
1944 // is that a bigger PLAB results in retaining something like the
1945 // original allocation order after promotion, which improves mutator
1946 // locality. A minor effect may be that larger PLABs reduce the
1947 // number of PLAB allocation events during gc. The value of 8kw
1948 // was arrived at by experimenting with specjbb.
1949 if (FLAG_SET_CMDLINE(OldPLABSize, 8 * K) != JVMFlag::SUCCESS) { // Note: this is in words
1950 return JNI_EINVAL;
1951 }
1952
1953 // Enable parallel GC and adaptive generation sizing
1954 if (FLAG_SET_CMDLINE(UseParallelGC, true) != JVMFlag::SUCCESS) {
1955 return JNI_EINVAL;
1956 }
1957
1958 // Encourage steady state memory management
1959 if (FLAG_SET_CMDLINE(ThresholdTolerance, 100) != JVMFlag::SUCCESS) {
1960 return JNI_EINVAL;
1961 }
1962
1963 // This appears to improve mutator locality
1964 if (FLAG_SET_CMDLINE(ScavengeBeforeFullGC, false) != JVMFlag::SUCCESS) {
1965 return JNI_EINVAL;
1966 }
1967
1968 return JNI_OK;
1969 }
1970
1971 // This must be called after ergonomics.
1972 void Arguments::set_bytecode_flags() {
1973 if (!RewriteBytecodes) {
1974 FLAG_SET_DEFAULT(RewriteFrequentPairs, false);
1975 }
1976 }
1977
1978 // Aggressive optimization flags
1979 jint Arguments::set_aggressive_opts_flags() {
1980 #ifdef COMPILER2
1981 if (AggressiveUnboxing) {
1982 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
1983 FLAG_SET_DEFAULT(EliminateAutoBox, true);
1984 } else if (!EliminateAutoBox) {
1985 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled");
1986 AggressiveUnboxing = false;
1987 }
1988 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) {
1989 FLAG_SET_DEFAULT(DoEscapeAnalysis, true);
1990 } else if (!DoEscapeAnalysis) {
1991 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled");
1992 AggressiveUnboxing = false;
1993 }
1994 }
1995 if (!FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
1996 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
1997 FLAG_SET_DEFAULT(EliminateAutoBox, true);
1998 }
1999 // Feed the cache size setting into the JDK
2000 char buffer[1024];
2001 jio_snprintf(buffer, 1024, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax);
2002 if (!add_property(buffer)) {
2003 return JNI_ENOMEM;
2004 }
2005 }
2006 #endif
2007
2008 return JNI_OK;
2009 }
2010
2011 //===========================================================================================================
2012 // Parsing of java.compiler property
2013
2014 void Arguments::process_java_compiler_argument(const char* arg) {
2015 // For backwards compatibility, Djava.compiler=NONE or ""
2016 // causes us to switch to -Xint mode UNLESS -Xdebug
2017 // is also specified.
2018 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) {
2019 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen.
2020 }
2021 }
2022
2023 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) {
2024 _sun_java_launcher = os::strdup_check_oom(launcher);
2025 }
2026
2027 bool Arguments::created_by_java_launcher() {
2028 assert(_sun_java_launcher != NULL, "property must have value");
2029 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0;
2030 }
2031
2032 bool Arguments::sun_java_launcher_is_altjvm() {
2033 return _sun_java_launcher_is_altjvm;
2034 }
2035
2036 //===========================================================================================================
2037 // Parsing of main arguments
2038
2039 unsigned int addreads_count = 0;
2040 unsigned int addexports_count = 0;
2041 unsigned int addopens_count = 0;
2042 unsigned int addmods_count = 0;
2043 unsigned int patch_mod_count = 0;
2044
2045 // Check the consistency of vm_init_args
2046 bool Arguments::check_vm_args_consistency() {
2047 // Method for adding checks for flag consistency.
2048 // The intent is to warn the user of all possible conflicts,
2049 // before returning an error.
2050 // Note: Needs platform-dependent factoring.
2051 bool status = true;
2052
2053 if (TLABRefillWasteFraction == 0) {
2054 jio_fprintf(defaultStream::error_stream(),
2055 "TLABRefillWasteFraction should be a denominator, "
2056 "not " SIZE_FORMAT "\n",
2057 TLABRefillWasteFraction);
2058 status = false;
2059 }
2060
2061 if (PrintNMTStatistics) {
2062 #if INCLUDE_NMT
2063 if (MemTracker::tracking_level() == NMT_off) {
2064 #endif // INCLUDE_NMT
2065 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled");
2066 PrintNMTStatistics = false;
2067 #if INCLUDE_NMT
2068 }
2069 #endif
2070 }
2071
2072 status = CompilerConfig::check_args_consistency(status);
2073 #if INCLUDE_JVMCI
2074 if (status && EnableJVMCI) {
2075 PropertyList_unique_add(&_system_properties, "jdk.internal.vm.ci.enabled", "true",
2076 AddProperty, UnwriteableProperty, InternalProperty);
2077 if (!create_numbered_property("jdk.module.addmods", "jdk.internal.vm.ci", addmods_count++)) {
2078 return false;
2079 }
2080 }
2081 #endif
2082
2083 #ifndef SUPPORT_RESERVED_STACK_AREA
2084 if (StackReservedPages != 0) {
2085 FLAG_SET_CMDLINE(StackReservedPages, 0);
2086 warning("Reserved Stack Area not supported on this platform");
2087 }
2088 #endif
2089
2090 if (!FLAG_IS_DEFAULT(AllocateHeapAt)) {
2091 if ((UseNUMAInterleaving && !FLAG_IS_DEFAULT(UseNUMAInterleaving)) || (UseNUMA && !FLAG_IS_DEFAULT(UseNUMA))) {
2092 log_warning(arguments) ("NUMA support for Heap depends on the file system when AllocateHeapAt option is used.\n");
2093 }
2094 }
2095
2096 status = status && GCArguments::check_args_consistency();
2097
2098 return status;
2099 }
2100
2101 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore,
2102 const char* option_type) {
2103 if (ignore) return false;
2104
2105 const char* spacer = " ";
2106 if (option_type == NULL) {
2107 option_type = ++spacer; // Set both to the empty string.
2108 }
2109
2110 jio_fprintf(defaultStream::error_stream(),
2111 "Unrecognized %s%soption: %s\n", option_type, spacer,
2112 option->optionString);
2113 return true;
2114 }
2115
2116 static const char* user_assertion_options[] = {
2117 "-da", "-ea", "-disableassertions", "-enableassertions", 0
2118 };
2119
2120 static const char* system_assertion_options[] = {
2121 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0
2122 };
2123
2124 bool Arguments::parse_uintx(const char* value,
2125 uintx* uintx_arg,
2126 uintx min_size) {
2127
2128 // Check the sign first since atojulong() parses only unsigned values.
2129 bool value_is_positive = !(*value == '-');
2130
2131 if (value_is_positive) {
2132 julong n;
2133 bool good_return = atojulong(value, &n);
2134 if (good_return) {
2135 bool above_minimum = n >= min_size;
2136 bool value_is_too_large = n > max_uintx;
2137
2138 if (above_minimum && !value_is_too_large) {
2139 *uintx_arg = n;
2140 return true;
2141 }
2142 }
2143 }
2144 return false;
2145 }
2146
2147 bool Arguments::create_property(const char* prop_name, const char* prop_value, PropertyInternal internal) {
2148 size_t prop_len = strlen(prop_name) + strlen(prop_value) + 2;
2149 char* property = AllocateHeap(prop_len, mtArguments);
2150 int ret = jio_snprintf(property, prop_len, "%s=%s", prop_name, prop_value);
2151 if (ret < 0 || ret >= (int)prop_len) {
2152 FreeHeap(property);
2153 return false;
2154 }
2155 bool added = add_property(property, UnwriteableProperty, internal);
2156 FreeHeap(property);
2157 return added;
2158 }
2159
2160 bool Arguments::create_numbered_property(const char* prop_base_name, const char* prop_value, unsigned int count) {
2161 const unsigned int props_count_limit = 1000;
2162 const int max_digits = 3;
2163 const int extra_symbols_count = 3; // includes '.', '=', '\0'
2164
2165 // Make sure count is < props_count_limit. Otherwise, memory allocation will be too small.
2166 if (count < props_count_limit) {
2167 size_t prop_len = strlen(prop_base_name) + strlen(prop_value) + max_digits + extra_symbols_count;
2168 char* property = AllocateHeap(prop_len, mtArguments);
2169 int ret = jio_snprintf(property, prop_len, "%s.%d=%s", prop_base_name, count, prop_value);
2170 if (ret < 0 || ret >= (int)prop_len) {
2171 FreeHeap(property);
2172 jio_fprintf(defaultStream::error_stream(), "Failed to create property %s.%d=%s\n", prop_base_name, count, prop_value);
2173 return false;
2174 }
2175 bool added = add_property(property, UnwriteableProperty, InternalProperty);
2176 FreeHeap(property);
2177 return added;
2178 }
2179
2180 jio_fprintf(defaultStream::error_stream(), "Property count limit exceeded: %s, limit=%d\n", prop_base_name, props_count_limit);
2181 return false;
2182 }
2183
2184 Arguments::ArgsRange Arguments::parse_memory_size(const char* s,
2185 julong* long_arg,
2186 julong min_size,
2187 julong max_size) {
2188 if (!atojulong(s, long_arg)) return arg_unreadable;
2189 return check_memory_size(*long_arg, min_size, max_size);
2190 }
2191
2192 // Parse JavaVMInitArgs structure
2193
2194 jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args,
2195 const JavaVMInitArgs *java_options_args,
2196 const JavaVMInitArgs *cmd_line_args) {
2197 bool patch_mod_javabase = false;
2198
2199 // Save default settings for some mode flags
2200 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
2201 Arguments::_UseOnStackReplacement = UseOnStackReplacement;
2202 Arguments::_ClipInlining = ClipInlining;
2203 Arguments::_BackgroundCompilation = BackgroundCompilation;
2204 if (TieredCompilation) {
2205 Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
2206 Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
2207 }
2208
2209 // Setup flags for mixed which is the default
2210 set_mode_flags(_mixed);
2211
2212 // Parse args structure generated from JAVA_TOOL_OPTIONS environment
2213 // variable (if present).
2214 jint result = parse_each_vm_init_arg(java_tool_options_args, &patch_mod_javabase, JVMFlag::ENVIRON_VAR);
2215 if (result != JNI_OK) {
2216 return result;
2217 }
2218
2219 // Parse args structure generated from the command line flags.
2220 result = parse_each_vm_init_arg(cmd_line_args, &patch_mod_javabase, JVMFlag::COMMAND_LINE);
2221 if (result != JNI_OK) {
2222 return result;
2223 }
2224
2225 // Parse args structure generated from the _JAVA_OPTIONS environment
2226 // variable (if present) (mimics classic VM)
2227 result = parse_each_vm_init_arg(java_options_args, &patch_mod_javabase, JVMFlag::ENVIRON_VAR);
2228 if (result != JNI_OK) {
2229 return result;
2230 }
2231
2232 // We need to ensure processor and memory resources have been properly
2233 // configured - which may rely on arguments we just processed - before
2234 // doing the final argument processing. Any argument processing that
2235 // needs to know about processor and memory resources must occur after
2236 // this point.
2237
2238 os::init_container_support();
2239
2240 // Do final processing now that all arguments have been parsed
2241 result = finalize_vm_init_args(patch_mod_javabase);
2242 if (result != JNI_OK) {
2243 return result;
2244 }
2245
2246 return JNI_OK;
2247 }
2248
2249 // Checks if name in command-line argument -agent{lib,path}:name[=options]
2250 // represents a valid JDWP agent. is_path==true denotes that we
2251 // are dealing with -agentpath (case where name is a path), otherwise with
2252 // -agentlib
2253 bool valid_jdwp_agent(char *name, bool is_path) {
2254 char *_name;
2255 const char *_jdwp = "jdwp";
2256 size_t _len_jdwp, _len_prefix;
2257
2258 if (is_path) {
2259 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) {
2260 return false;
2261 }
2262
2263 _name++; // skip past last path separator
2264 _len_prefix = strlen(JNI_LIB_PREFIX);
2265
2266 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) {
2267 return false;
2268 }
2269
2270 _name += _len_prefix;
2271 _len_jdwp = strlen(_jdwp);
2272
2273 if (strncmp(_name, _jdwp, _len_jdwp) == 0) {
2274 _name += _len_jdwp;
2275 }
2276 else {
2277 return false;
2278 }
2279
2280 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) {
2281 return false;
2282 }
2283
2284 return true;
2285 }
2286
2287 if (strcmp(name, _jdwp) == 0) {
2288 return true;
2289 }
2290
2291 return false;
2292 }
2293
2294 int Arguments::process_patch_mod_option(const char* patch_mod_tail, bool* patch_mod_javabase) {
2295 // --patch-module=<module>=<file>(<pathsep><file>)*
2296 assert(patch_mod_tail != NULL, "Unexpected NULL patch-module value");
2297 // Find the equal sign between the module name and the path specification
2298 const char* module_equal = strchr(patch_mod_tail, '=');
2299 if (module_equal == NULL) {
2300 jio_fprintf(defaultStream::output_stream(), "Missing '=' in --patch-module specification\n");
2301 return JNI_ERR;
2302 } else {
2303 // Pick out the module name
2304 size_t module_len = module_equal - patch_mod_tail;
2305 char* module_name = NEW_C_HEAP_ARRAY_RETURN_NULL(char, module_len+1, mtArguments);
2306 if (module_name != NULL) {
2307 memcpy(module_name, patch_mod_tail, module_len);
2308 *(module_name + module_len) = '\0';
2309 // The path piece begins one past the module_equal sign
2310 add_patch_mod_prefix(module_name, module_equal + 1, patch_mod_javabase);
2311 FREE_C_HEAP_ARRAY(char, module_name);
2312 if (!create_numbered_property("jdk.module.patch", patch_mod_tail, patch_mod_count++)) {
2313 return JNI_ENOMEM;
2314 }
2315 } else {
2316 return JNI_ENOMEM;
2317 }
2318 }
2319 return JNI_OK;
2320 }
2321
2322 // Parse -Xss memory string parameter and convert to ThreadStackSize in K.
2323 jint Arguments::parse_xss(const JavaVMOption* option, const char* tail, intx* out_ThreadStackSize) {
2324 // The min and max sizes match the values in globals.hpp, but scaled
2325 // with K. The values have been chosen so that alignment with page
2326 // size doesn't change the max value, which makes the conversions
2327 // back and forth between Xss value and ThreadStackSize value easier.
2328 // The values have also been chosen to fit inside a 32-bit signed type.
2329 const julong min_ThreadStackSize = 0;
2330 const julong max_ThreadStackSize = 1 * M;
2331
2332 const julong min_size = min_ThreadStackSize * K;
2333 const julong max_size = max_ThreadStackSize * K;
2334
2335 assert(is_aligned(max_size, os::vm_page_size()), "Implementation assumption");
2336
2337 julong size = 0;
2338 ArgsRange errcode = parse_memory_size(tail, &size, min_size, max_size);
2339 if (errcode != arg_in_range) {
2340 bool silent = (option == NULL); // Allow testing to silence error messages
2341 if (!silent) {
2342 jio_fprintf(defaultStream::error_stream(),
2343 "Invalid thread stack size: %s\n", option->optionString);
2344 describe_range_error(errcode);
2345 }
2346 return JNI_EINVAL;
2347 }
2348
2349 // Internally track ThreadStackSize in units of 1024 bytes.
2350 const julong size_aligned = align_up(size, K);
2351 assert(size <= size_aligned,
2352 "Overflow: " JULONG_FORMAT " " JULONG_FORMAT,
2353 size, size_aligned);
2354
2355 const julong size_in_K = size_aligned / K;
2356 assert(size_in_K < (julong)max_intx,
2357 "size_in_K doesn't fit in the type of ThreadStackSize: " JULONG_FORMAT,
2358 size_in_K);
2359
2360 // Check that code expanding ThreadStackSize to a page aligned number of bytes won't overflow.
2361 const julong max_expanded = align_up(size_in_K * K, os::vm_page_size());
2362 assert(max_expanded < max_uintx && max_expanded >= size_in_K,
2363 "Expansion overflowed: " JULONG_FORMAT " " JULONG_FORMAT,
2364 max_expanded, size_in_K);
2365
2366 *out_ThreadStackSize = (intx)size_in_K;
2367
2368 return JNI_OK;
2369 }
2370
2371 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, bool* patch_mod_javabase, JVMFlag::Flags origin) {
2372 // For match_option to return remaining or value part of option string
2373 const char* tail;
2374
2375 // iterate over arguments
2376 for (int index = 0; index < args->nOptions; index++) {
2377 bool is_absolute_path = false; // for -agentpath vs -agentlib
2378
2379 const JavaVMOption* option = args->options + index;
2380
2381 if (!match_option(option, "-Djava.class.path", &tail) &&
2382 !match_option(option, "-Dsun.java.command", &tail) &&
2383 !match_option(option, "-Dsun.java.launcher", &tail)) {
2384
2385 // add all jvm options to the jvm_args string. This string
2386 // is used later to set the java.vm.args PerfData string constant.
2387 // the -Djava.class.path and the -Dsun.java.command options are
2388 // omitted from jvm_args string as each have their own PerfData
2389 // string constant object.
2390 build_jvm_args(option->optionString);
2391 }
2392
2393 // -verbose:[class/module/gc/jni]
2394 if (match_option(option, "-verbose", &tail)) {
2395 if (!strcmp(tail, ":class") || !strcmp(tail, "")) {
2396 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, load));
2397 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, unload));
2398 } else if (!strcmp(tail, ":module")) {
2399 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, load));
2400 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, unload));
2401 } else if (!strcmp(tail, ":gc")) {
2402 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
2403 } else if (!strcmp(tail, ":jni")) {
2404 if (FLAG_SET_CMDLINE(PrintJNIResolving, true) != JVMFlag::SUCCESS) {
2405 return JNI_EINVAL;
2406 }
2407 }
2408 // -da / -ea / -disableassertions / -enableassertions
2409 // These accept an optional class/package name separated by a colon, e.g.,
2410 // -da:java.lang.Thread.
2411 } else if (match_option(option, user_assertion_options, &tail, true)) {
2412 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2413 if (*tail == '\0') {
2414 JavaAssertions::setUserClassDefault(enable);
2415 } else {
2416 assert(*tail == ':', "bogus match by match_option()");
2417 JavaAssertions::addOption(tail + 1, enable);
2418 }
2419 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions
2420 } else if (match_option(option, system_assertion_options, &tail, false)) {
2421 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2422 JavaAssertions::setSystemClassDefault(enable);
2423 // -bootclasspath:
2424 } else if (match_option(option, "-Xbootclasspath:", &tail)) {
2425 jio_fprintf(defaultStream::output_stream(),
2426 "-Xbootclasspath is no longer a supported option.\n");
2427 return JNI_EINVAL;
2428 // -bootclasspath/a:
2429 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) {
2430 Arguments::append_sysclasspath(tail);
2431 // -bootclasspath/p:
2432 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) {
2433 jio_fprintf(defaultStream::output_stream(),
2434 "-Xbootclasspath/p is no longer a supported option.\n");
2435 return JNI_EINVAL;
2436 // -Xrun
2437 } else if (match_option(option, "-Xrun", &tail)) {
2438 if (tail != NULL) {
2439 const char* pos = strchr(tail, ':');
2440 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2441 char* name = NEW_C_HEAP_ARRAY(char, len + 1, mtArguments);
2442 jio_snprintf(name, len + 1, "%s", tail);
2443
2444 char *options = NULL;
2445 if(pos != NULL) {
2446 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied.
2447 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtArguments), pos+1, len2);
2448 }
2449 #if !INCLUDE_JVMTI
2450 if (strcmp(name, "jdwp") == 0) {
2451 jio_fprintf(defaultStream::error_stream(),
2452 "Debugging agents are not supported in this VM\n");
2453 return JNI_ERR;
2454 }
2455 #endif // !INCLUDE_JVMTI
2456 add_init_library(name, options);
2457 }
2458 } else if (match_option(option, "--add-reads=", &tail)) {
2459 if (!create_numbered_property("jdk.module.addreads", tail, addreads_count++)) {
2460 return JNI_ENOMEM;
2461 }
2462 } else if (match_option(option, "--add-exports=", &tail)) {
2463 if (!create_numbered_property("jdk.module.addexports", tail, addexports_count++)) {
2464 return JNI_ENOMEM;
2465 }
2466 } else if (match_option(option, "--add-opens=", &tail)) {
2467 if (!create_numbered_property("jdk.module.addopens", tail, addopens_count++)) {
2468 return JNI_ENOMEM;
2469 }
2470 } else if (match_option(option, "--add-modules=", &tail)) {
2471 if (!create_numbered_property("jdk.module.addmods", tail, addmods_count++)) {
2472 return JNI_ENOMEM;
2473 }
2474 } else if (match_option(option, "--limit-modules=", &tail)) {
2475 if (!create_property("jdk.module.limitmods", tail, InternalProperty)) {
2476 return JNI_ENOMEM;
2477 }
2478 } else if (match_option(option, "--module-path=", &tail)) {
2479 if (!create_property("jdk.module.path", tail, ExternalProperty)) {
2480 return JNI_ENOMEM;
2481 }
2482 } else if (match_option(option, "--upgrade-module-path=", &tail)) {
2483 if (!create_property("jdk.module.upgrade.path", tail, ExternalProperty)) {
2484 return JNI_ENOMEM;
2485 }
2486 } else if (match_option(option, "--patch-module=", &tail)) {
2487 // --patch-module=<module>=<file>(<pathsep><file>)*
2488 int res = process_patch_mod_option(tail, patch_mod_javabase);
2489 if (res != JNI_OK) {
2490 return res;
2491 }
2492 } else if (match_option(option, "--illegal-access=", &tail)) {
2493 if (!create_property("jdk.module.illegalAccess", tail, ExternalProperty)) {
2494 return JNI_ENOMEM;
2495 }
2496 // -agentlib and -agentpath
2497 } else if (match_option(option, "-agentlib:", &tail) ||
2498 (is_absolute_path = match_option(option, "-agentpath:", &tail))) {
2499 if(tail != NULL) {
2500 const char* pos = strchr(tail, '=');
2501 char* name;
2502 if (pos == NULL) {
2503 name = os::strdup_check_oom(tail, mtArguments);
2504 } else {
2505 size_t len = pos - tail;
2506 name = NEW_C_HEAP_ARRAY(char, len + 1, mtArguments);
2507 memcpy(name, tail, len);
2508 name[len] = '\0';
2509 }
2510
2511 char *options = NULL;
2512 if(pos != NULL) {
2513 options = os::strdup_check_oom(pos + 1, mtArguments);
2514 }
2515 #if !INCLUDE_JVMTI
2516 if (valid_jdwp_agent(name, is_absolute_path)) {
2517 jio_fprintf(defaultStream::error_stream(),
2518 "Debugging agents are not supported in this VM\n");
2519 return JNI_ERR;
2520 }
2521 #endif // !INCLUDE_JVMTI
2522 add_init_agent(name, options, is_absolute_path);
2523 }
2524 // -javaagent
2525 } else if (match_option(option, "-javaagent:", &tail)) {
2526 #if !INCLUDE_JVMTI
2527 jio_fprintf(defaultStream::error_stream(),
2528 "Instrumentation agents are not supported in this VM\n");
2529 return JNI_ERR;
2530 #else
2531 if (tail != NULL) {
2532 size_t length = strlen(tail) + 1;
2533 char *options = NEW_C_HEAP_ARRAY(char, length, mtArguments);
2534 jio_snprintf(options, length, "%s", tail);
2535 add_instrument_agent("instrument", options, false);
2536 // java agents need module java.instrument
2537 if (!create_numbered_property("jdk.module.addmods", "java.instrument", addmods_count++)) {
2538 return JNI_ENOMEM;
2539 }
2540 }
2541 #endif // !INCLUDE_JVMTI
2542 // --enable_preview
2543 } else if (match_option(option, "--enable-preview")) {
2544 set_enable_preview();
2545 // -Xnoclassgc
2546 } else if (match_option(option, "-Xnoclassgc")) {
2547 if (FLAG_SET_CMDLINE(ClassUnloading, false) != JVMFlag::SUCCESS) {
2548 return JNI_EINVAL;
2549 }
2550 // -Xconcgc
2551 } else if (match_option(option, "-Xconcgc")) {
2552 if (FLAG_SET_CMDLINE(UseConcMarkSweepGC, true) != JVMFlag::SUCCESS) {
2553 return JNI_EINVAL;
2554 }
2555 handle_extra_cms_flags("-Xconcgc uses UseConcMarkSweepGC");
2556 // -Xnoconcgc
2557 } else if (match_option(option, "-Xnoconcgc")) {
2558 if (FLAG_SET_CMDLINE(UseConcMarkSweepGC, false) != JVMFlag::SUCCESS) {
2559 return JNI_EINVAL;
2560 }
2561 handle_extra_cms_flags("-Xnoconcgc uses UseConcMarkSweepGC");
2562 // -Xbatch
2563 } else if (match_option(option, "-Xbatch")) {
2564 if (FLAG_SET_CMDLINE(BackgroundCompilation, false) != JVMFlag::SUCCESS) {
2565 return JNI_EINVAL;
2566 }
2567 // -Xmn for compatibility with other JVM vendors
2568 } else if (match_option(option, "-Xmn", &tail)) {
2569 julong long_initial_young_size = 0;
2570 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1);
2571 if (errcode != arg_in_range) {
2572 jio_fprintf(defaultStream::error_stream(),
2573 "Invalid initial young generation size: %s\n", option->optionString);
2574 describe_range_error(errcode);
2575 return JNI_EINVAL;
2576 }
2577 if (FLAG_SET_CMDLINE(MaxNewSize, (size_t)long_initial_young_size) != JVMFlag::SUCCESS) {
2578 return JNI_EINVAL;
2579 }
2580 if (FLAG_SET_CMDLINE(NewSize, (size_t)long_initial_young_size) != JVMFlag::SUCCESS) {
2581 return JNI_EINVAL;
2582 }
2583 // -Xms
2584 } else if (match_option(option, "-Xms", &tail)) {
2585 julong size = 0;
2586 // an initial heap size of 0 means automatically determine
2587 ArgsRange errcode = parse_memory_size(tail, &size, 0);
2588 if (errcode != arg_in_range) {
2589 jio_fprintf(defaultStream::error_stream(),
2590 "Invalid initial heap size: %s\n", option->optionString);
2591 describe_range_error(errcode);
2592 return JNI_EINVAL;
2593 }
2594 if (FLAG_SET_CMDLINE(MinHeapSize, (size_t)size) != JVMFlag::SUCCESS) {
2595 return JNI_EINVAL;
2596 }
2597 if (FLAG_SET_CMDLINE(InitialHeapSize, (size_t)size) != JVMFlag::SUCCESS) {
2598 return JNI_EINVAL;
2599 }
2600 // -Xmx
2601 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) {
2602 julong long_max_heap_size = 0;
2603 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1);
2604 if (errcode != arg_in_range) {
2605 jio_fprintf(defaultStream::error_stream(),
2606 "Invalid maximum heap size: %s\n", option->optionString);
2607 describe_range_error(errcode);
2608 return JNI_EINVAL;
2609 }
2610 if (FLAG_SET_CMDLINE(MaxHeapSize, (size_t)long_max_heap_size) != JVMFlag::SUCCESS) {
2611 return JNI_EINVAL;
2612 }
2613 // Xmaxf
2614 } else if (match_option(option, "-Xmaxf", &tail)) {
2615 char* err;
2616 int maxf = (int)(strtod(tail, &err) * 100);
2617 if (*err != '\0' || *tail == '\0') {
2618 jio_fprintf(defaultStream::error_stream(),
2619 "Bad max heap free percentage size: %s\n",
2620 option->optionString);
2621 return JNI_EINVAL;
2622 } else {
2623 if (FLAG_SET_CMDLINE(MaxHeapFreeRatio, maxf) != JVMFlag::SUCCESS) {
2624 return JNI_EINVAL;
2625 }
2626 }
2627 // Xminf
2628 } else if (match_option(option, "-Xminf", &tail)) {
2629 char* err;
2630 int minf = (int)(strtod(tail, &err) * 100);
2631 if (*err != '\0' || *tail == '\0') {
2632 jio_fprintf(defaultStream::error_stream(),
2633 "Bad min heap free percentage size: %s\n",
2634 option->optionString);
2635 return JNI_EINVAL;
2636 } else {
2637 if (FLAG_SET_CMDLINE(MinHeapFreeRatio, minf) != JVMFlag::SUCCESS) {
2638 return JNI_EINVAL;
2639 }
2640 }
2641 // -Xss
2642 } else if (match_option(option, "-Xss", &tail)) {
2643 intx value = 0;
2644 jint err = parse_xss(option, tail, &value);
2645 if (err != JNI_OK) {
2646 return err;
2647 }
2648 if (FLAG_SET_CMDLINE(ThreadStackSize, value) != JVMFlag::SUCCESS) {
2649 return JNI_EINVAL;
2650 }
2651 } else if (match_option(option, "-Xmaxjitcodesize", &tail) ||
2652 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) {
2653 julong long_ReservedCodeCacheSize = 0;
2654
2655 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1);
2656 if (errcode != arg_in_range) {
2657 jio_fprintf(defaultStream::error_stream(),
2658 "Invalid maximum code cache size: %s.\n", option->optionString);
2659 return JNI_EINVAL;
2660 }
2661 if (FLAG_SET_CMDLINE(ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != JVMFlag::SUCCESS) {
2662 return JNI_EINVAL;
2663 }
2664 // -green
2665 } else if (match_option(option, "-green")) {
2666 jio_fprintf(defaultStream::error_stream(),
2667 "Green threads support not available\n");
2668 return JNI_EINVAL;
2669 // -native
2670 } else if (match_option(option, "-native")) {
2671 // HotSpot always uses native threads, ignore silently for compatibility
2672 // -Xrs
2673 } else if (match_option(option, "-Xrs")) {
2674 // Classic/EVM option, new functionality
2675 if (FLAG_SET_CMDLINE(ReduceSignalUsage, true) != JVMFlag::SUCCESS) {
2676 return JNI_EINVAL;
2677 }
2678 // -Xprof
2679 } else if (match_option(option, "-Xprof")) {
2680 char version[256];
2681 // Obsolete in JDK 10
2682 JDK_Version::jdk(10).to_string(version, sizeof(version));
2683 warning("Ignoring option %s; support was removed in %s", option->optionString, version);
2684 // -Xinternalversion
2685 } else if (match_option(option, "-Xinternalversion")) {
2686 jio_fprintf(defaultStream::output_stream(), "%s\n",
2687 VM_Version::internal_vm_info_string());
2688 vm_exit(0);
2689 #ifndef PRODUCT
2690 // -Xprintflags
2691 } else if (match_option(option, "-Xprintflags")) {
2692 JVMFlag::printFlags(tty, false);
2693 vm_exit(0);
2694 #endif
2695 // -D
2696 } else if (match_option(option, "-D", &tail)) {
2697 const char* value;
2698 if (match_option(option, "-Djava.endorsed.dirs=", &value) &&
2699 *value!= '\0' && strcmp(value, "\"\"") != 0) {
2700 // abort if -Djava.endorsed.dirs is set
2701 jio_fprintf(defaultStream::output_stream(),
2702 "-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n"
2703 "in modular form will be supported via the concept of upgradeable modules.\n", value);
2704 return JNI_EINVAL;
2705 }
2706 if (match_option(option, "-Djava.ext.dirs=", &value) &&
2707 *value != '\0' && strcmp(value, "\"\"") != 0) {
2708 // abort if -Djava.ext.dirs is set
2709 jio_fprintf(defaultStream::output_stream(),
2710 "-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value);
2711 return JNI_EINVAL;
2712 }
2713 // Check for module related properties. They must be set using the modules
2714 // options. For example: use "--add-modules=java.sql", not
2715 // "-Djdk.module.addmods=java.sql"
2716 if (is_internal_module_property(option->optionString + 2)) {
2717 needs_module_property_warning = true;
2718 continue;
2719 }
2720
2721 if (!add_property(tail)) {
2722 return JNI_ENOMEM;
2723 }
2724 // Out of the box management support
2725 if (match_option(option, "-Dcom.sun.management", &tail)) {
2726 #if INCLUDE_MANAGEMENT
2727 if (FLAG_SET_CMDLINE(ManagementServer, true) != JVMFlag::SUCCESS) {
2728 return JNI_EINVAL;
2729 }
2730 // management agent in module jdk.management.agent
2731 if (!create_numbered_property("jdk.module.addmods", "jdk.management.agent", addmods_count++)) {
2732 return JNI_ENOMEM;
2733 }
2734 #else
2735 jio_fprintf(defaultStream::output_stream(),
2736 "-Dcom.sun.management is not supported in this VM.\n");
2737 return JNI_ERR;
2738 #endif
2739 }
2740 // -Xint
2741 } else if (match_option(option, "-Xint")) {
2742 set_mode_flags(_int);
2743 // -Xmixed
2744 } else if (match_option(option, "-Xmixed")) {
2745 set_mode_flags(_mixed);
2746 // -Xcomp
2747 } else if (match_option(option, "-Xcomp")) {
2748 // for testing the compiler; turn off all flags that inhibit compilation
2749 set_mode_flags(_comp);
2750 // -Xshare:dump
2751 } else if (match_option(option, "-Xshare:dump")) {
2752 if (FLAG_SET_CMDLINE(DumpSharedSpaces, true) != JVMFlag::SUCCESS) {
2753 return JNI_EINVAL;
2754 }
2755 // -Xshare:on
2756 } else if (match_option(option, "-Xshare:on")) {
2757 if (FLAG_SET_CMDLINE(UseSharedSpaces, true) != JVMFlag::SUCCESS) {
2758 return JNI_EINVAL;
2759 }
2760 if (FLAG_SET_CMDLINE(RequireSharedSpaces, true) != JVMFlag::SUCCESS) {
2761 return JNI_EINVAL;
2762 }
2763 // -Xshare:auto || -XX:ArchiveClassesAtExit=<archive file>
2764 } else if (match_option(option, "-Xshare:auto")) {
2765 if (FLAG_SET_CMDLINE(UseSharedSpaces, true) != JVMFlag::SUCCESS) {
2766 return JNI_EINVAL;
2767 }
2768 if (FLAG_SET_CMDLINE(RequireSharedSpaces, false) != JVMFlag::SUCCESS) {
2769 return JNI_EINVAL;
2770 }
2771 // -Xshare:off
2772 } else if (match_option(option, "-Xshare:off")) {
2773 if (FLAG_SET_CMDLINE(UseSharedSpaces, false) != JVMFlag::SUCCESS) {
2774 return JNI_EINVAL;
2775 }
2776 if (FLAG_SET_CMDLINE(RequireSharedSpaces, false) != JVMFlag::SUCCESS) {
2777 return JNI_EINVAL;
2778 }
2779 // -Xverify
2780 } else if (match_option(option, "-Xverify", &tail)) {
2781 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) {
2782 if (FLAG_SET_CMDLINE(BytecodeVerificationLocal, true) != JVMFlag::SUCCESS) {
2783 return JNI_EINVAL;
2784 }
2785 if (FLAG_SET_CMDLINE(BytecodeVerificationRemote, true) != JVMFlag::SUCCESS) {
2786 return JNI_EINVAL;
2787 }
2788 } else if (strcmp(tail, ":remote") == 0) {
2789 if (FLAG_SET_CMDLINE(BytecodeVerificationLocal, false) != JVMFlag::SUCCESS) {
2790 return JNI_EINVAL;
2791 }
2792 if (FLAG_SET_CMDLINE(BytecodeVerificationRemote, true) != JVMFlag::SUCCESS) {
2793 return JNI_EINVAL;
2794 }
2795 } else if (strcmp(tail, ":none") == 0) {
2796 if (FLAG_SET_CMDLINE(BytecodeVerificationLocal, false) != JVMFlag::SUCCESS) {
2797 return JNI_EINVAL;
2798 }
2799 if (FLAG_SET_CMDLINE(BytecodeVerificationRemote, false) != JVMFlag::SUCCESS) {
2800 return JNI_EINVAL;
2801 }
2802 warning("Options -Xverify:none and -noverify were deprecated in JDK 13 and will likely be removed in a future release.");
2803 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) {
2804 return JNI_EINVAL;
2805 }
2806 // -Xdebug
2807 } else if (match_option(option, "-Xdebug")) {
2808 // note this flag has been used, then ignore
2809 set_xdebug_mode(true);
2810 // -Xnoagent
2811 } else if (match_option(option, "-Xnoagent")) {
2812 // For compatibility with classic. HotSpot refuses to load the old style agent.dll.
2813 } else if (match_option(option, "-Xloggc:", &tail)) {
2814 // Deprecated flag to redirect GC output to a file. -Xloggc:<filename>
2815 log_warning(gc)("-Xloggc is deprecated. Will use -Xlog:gc:%s instead.", tail);
2816 _gc_log_filename = os::strdup_check_oom(tail);
2817 } else if (match_option(option, "-Xlog", &tail)) {
2818 bool ret = false;
2819 if (strcmp(tail, ":help") == 0) {
2820 fileStream stream(defaultStream::output_stream());
2821 LogConfiguration::print_command_line_help(&stream);
2822 vm_exit(0);
2823 } else if (strcmp(tail, ":disable") == 0) {
2824 LogConfiguration::disable_logging();
2825 ret = true;
2826 } else if (*tail == '\0') {
2827 ret = LogConfiguration::parse_command_line_arguments();
2828 assert(ret, "-Xlog without arguments should never fail to parse");
2829 } else if (*tail == ':') {
2830 ret = LogConfiguration::parse_command_line_arguments(tail + 1);
2831 }
2832 if (ret == false) {
2833 jio_fprintf(defaultStream::error_stream(),
2834 "Invalid -Xlog option '-Xlog%s', see error log for details.\n",
2835 tail);
2836 return JNI_EINVAL;
2837 }
2838 // JNI hooks
2839 } else if (match_option(option, "-Xcheck", &tail)) {
2840 if (!strcmp(tail, ":jni")) {
2841 #if !INCLUDE_JNI_CHECK
2842 warning("JNI CHECKING is not supported in this VM");
2843 #else
2844 CheckJNICalls = true;
2845 #endif // INCLUDE_JNI_CHECK
2846 } else if (is_bad_option(option, args->ignoreUnrecognized,
2847 "check")) {
2848 return JNI_EINVAL;
2849 }
2850 } else if (match_option(option, "vfprintf")) {
2851 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo);
2852 } else if (match_option(option, "exit")) {
2853 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo);
2854 } else if (match_option(option, "abort")) {
2855 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo);
2856 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure;
2857 // and the last option wins.
2858 } else if (match_option(option, "-XX:+NeverTenure")) {
2859 if (FLAG_SET_CMDLINE(NeverTenure, true) != JVMFlag::SUCCESS) {
2860 return JNI_EINVAL;
2861 }
2862 if (FLAG_SET_CMDLINE(AlwaysTenure, false) != JVMFlag::SUCCESS) {
2863 return JNI_EINVAL;
2864 }
2865 if (FLAG_SET_CMDLINE(MaxTenuringThreshold, markWord::max_age + 1) != JVMFlag::SUCCESS) {
2866 return JNI_EINVAL;
2867 }
2868 } else if (match_option(option, "-XX:+AlwaysTenure")) {
2869 if (FLAG_SET_CMDLINE(NeverTenure, false) != JVMFlag::SUCCESS) {
2870 return JNI_EINVAL;
2871 }
2872 if (FLAG_SET_CMDLINE(AlwaysTenure, true) != JVMFlag::SUCCESS) {
2873 return JNI_EINVAL;
2874 }
2875 if (FLAG_SET_CMDLINE(MaxTenuringThreshold, 0) != JVMFlag::SUCCESS) {
2876 return JNI_EINVAL;
2877 }
2878 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) {
2879 uintx max_tenuring_thresh = 0;
2880 if (!parse_uintx(tail, &max_tenuring_thresh, 0)) {
2881 jio_fprintf(defaultStream::error_stream(),
2882 "Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail);
2883 return JNI_EINVAL;
2884 }
2885
2886 if (FLAG_SET_CMDLINE(MaxTenuringThreshold, max_tenuring_thresh) != JVMFlag::SUCCESS) {
2887 return JNI_EINVAL;
2888 }
2889
2890 if (MaxTenuringThreshold == 0) {
2891 if (FLAG_SET_CMDLINE(NeverTenure, false) != JVMFlag::SUCCESS) {
2892 return JNI_EINVAL;
2893 }
2894 if (FLAG_SET_CMDLINE(AlwaysTenure, true) != JVMFlag::SUCCESS) {
2895 return JNI_EINVAL;
2896 }
2897 } else {
2898 if (FLAG_SET_CMDLINE(NeverTenure, false) != JVMFlag::SUCCESS) {
2899 return JNI_EINVAL;
2900 }
2901 if (FLAG_SET_CMDLINE(AlwaysTenure, false) != JVMFlag::SUCCESS) {
2902 return JNI_EINVAL;
2903 }
2904 }
2905 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) {
2906 if (FLAG_SET_CMDLINE(DisplayVMOutputToStdout, false) != JVMFlag::SUCCESS) {
2907 return JNI_EINVAL;
2908 }
2909 if (FLAG_SET_CMDLINE(DisplayVMOutputToStderr, true) != JVMFlag::SUCCESS) {
2910 return JNI_EINVAL;
2911 }
2912 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) {
2913 if (FLAG_SET_CMDLINE(DisplayVMOutputToStderr, false) != JVMFlag::SUCCESS) {
2914 return JNI_EINVAL;
2915 }
2916 if (FLAG_SET_CMDLINE(DisplayVMOutputToStdout, true) != JVMFlag::SUCCESS) {
2917 return JNI_EINVAL;
2918 }
2919 } else if (match_option(option, "-XX:+ErrorFileToStderr")) {
2920 if (FLAG_SET_CMDLINE(ErrorFileToStdout, false) != JVMFlag::SUCCESS) {
2921 return JNI_EINVAL;
2922 }
2923 if (FLAG_SET_CMDLINE(ErrorFileToStderr, true) != JVMFlag::SUCCESS) {
2924 return JNI_EINVAL;
2925 }
2926 } else if (match_option(option, "-XX:+ErrorFileToStdout")) {
2927 if (FLAG_SET_CMDLINE(ErrorFileToStderr, false) != JVMFlag::SUCCESS) {
2928 return JNI_EINVAL;
2929 }
2930 if (FLAG_SET_CMDLINE(ErrorFileToStdout, true) != JVMFlag::SUCCESS) {
2931 return JNI_EINVAL;
2932 }
2933 } else if (match_option(option, "-XX:+ExtendedDTraceProbes")) {
2934 #if defined(DTRACE_ENABLED)
2935 if (FLAG_SET_CMDLINE(ExtendedDTraceProbes, true) != JVMFlag::SUCCESS) {
2936 return JNI_EINVAL;
2937 }
2938 if (FLAG_SET_CMDLINE(DTraceMethodProbes, true) != JVMFlag::SUCCESS) {
2939 return JNI_EINVAL;
2940 }
2941 if (FLAG_SET_CMDLINE(DTraceAllocProbes, true) != JVMFlag::SUCCESS) {
2942 return JNI_EINVAL;
2943 }
2944 if (FLAG_SET_CMDLINE(DTraceMonitorProbes, true) != JVMFlag::SUCCESS) {
2945 return JNI_EINVAL;
2946 }
2947 #else // defined(DTRACE_ENABLED)
2948 jio_fprintf(defaultStream::error_stream(),
2949 "ExtendedDTraceProbes flag is not applicable for this configuration\n");
2950 return JNI_EINVAL;
2951 #endif // defined(DTRACE_ENABLED)
2952 #ifdef ASSERT
2953 } else if (match_option(option, "-XX:+FullGCALot")) {
2954 if (FLAG_SET_CMDLINE(FullGCALot, true) != JVMFlag::SUCCESS) {
2955 return JNI_EINVAL;
2956 }
2957 // disable scavenge before parallel mark-compact
2958 if (FLAG_SET_CMDLINE(ScavengeBeforeFullGC, false) != JVMFlag::SUCCESS) {
2959 return JNI_EINVAL;
2960 }
2961 #endif
2962 #if !INCLUDE_MANAGEMENT
2963 } else if (match_option(option, "-XX:+ManagementServer")) {
2964 jio_fprintf(defaultStream::error_stream(),
2965 "ManagementServer is not supported in this VM.\n");
2966 return JNI_ERR;
2967 #endif // INCLUDE_MANAGEMENT
2968 #if INCLUDE_JFR
2969 } else if (match_jfr_option(&option)) {
2970 return JNI_EINVAL;
2971 #endif
2972 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx
2973 // Skip -XX:Flags= and -XX:VMOptionsFile= since those cases have
2974 // already been handled
2975 if ((strncmp(tail, "Flags=", strlen("Flags=")) != 0) &&
2976 (strncmp(tail, "VMOptionsFile=", strlen("VMOptionsFile=")) != 0)) {
2977 if (!process_argument(tail, args->ignoreUnrecognized, origin)) {
2978 return JNI_EINVAL;
2979 }
2980 }
2981 // Unknown option
2982 } else if (is_bad_option(option, args->ignoreUnrecognized)) {
2983 return JNI_ERR;
2984 }
2985 }
2986
2987 // PrintSharedArchiveAndExit will turn on
2988 // -Xshare:on
2989 // -Xlog:class+path=info
2990 if (PrintSharedArchiveAndExit) {
2991 if (FLAG_SET_CMDLINE(UseSharedSpaces, true) != JVMFlag::SUCCESS) {
2992 return JNI_EINVAL;
2993 }
2994 if (FLAG_SET_CMDLINE(RequireSharedSpaces, true) != JVMFlag::SUCCESS) {
2995 return JNI_EINVAL;
2996 }
2997 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, path));
2998 }
2999
3000 fix_appclasspath();
3001
3002 return JNI_OK;
3003 }
3004
3005 void Arguments::add_patch_mod_prefix(const char* module_name, const char* path, bool* patch_mod_javabase) {
3006 // For java.base check for duplicate --patch-module options being specified on the command line.
3007 // This check is only required for java.base, all other duplicate module specifications
3008 // will be checked during module system initialization. The module system initialization
3009 // will throw an ExceptionInInitializerError if this situation occurs.
3010 if (strcmp(module_name, JAVA_BASE_NAME) == 0) {
3011 if (*patch_mod_javabase) {
3012 vm_exit_during_initialization("Cannot specify " JAVA_BASE_NAME " more than once to --patch-module");
3013 } else {
3014 *patch_mod_javabase = true;
3015 }
3016 }
3017
3018 // Create GrowableArray lazily, only if --patch-module has been specified
3019 if (_patch_mod_prefix == NULL) {
3020 _patch_mod_prefix = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<ModulePatchPath*>(10, true);
3021 }
3022
3023 _patch_mod_prefix->push(new ModulePatchPath(module_name, path));
3024 }
3025
3026 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled)
3027 //
3028 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar
3029 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar".
3030 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty
3031 // path is treated as the current directory.
3032 //
3033 // This causes problems with CDS, which requires that all directories specified in the classpath
3034 // must be empty. In most cases, applications do NOT want to load classes from the current
3035 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up
3036 // scripts compatible with CDS.
3037 void Arguments::fix_appclasspath() {
3038 if (IgnoreEmptyClassPaths) {
3039 const char separator = *os::path_separator();
3040 const char* src = _java_class_path->value();
3041
3042 // skip over all the leading empty paths
3043 while (*src == separator) {
3044 src ++;
3045 }
3046
3047 char* copy = os::strdup_check_oom(src, mtArguments);
3048
3049 // trim all trailing empty paths
3050 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) {
3051 *tail = '\0';
3052 }
3053
3054 char from[3] = {separator, separator, '\0'};
3055 char to [2] = {separator, '\0'};
3056 while (StringUtils::replace_no_expand(copy, from, to) > 0) {
3057 // Keep replacing "::" -> ":" until we have no more "::" (non-windows)
3058 // Keep replacing ";;" -> ";" until we have no more ";;" (windows)
3059 }
3060
3061 _java_class_path->set_writeable_value(copy);
3062 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore
3063 }
3064 }
3065
3066 jint Arguments::finalize_vm_init_args(bool patch_mod_javabase) {
3067 // check if the default lib/endorsed directory exists; if so, error
3068 char path[JVM_MAXPATHLEN];
3069 const char* fileSep = os::file_separator();
3070 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep);
3071
3072 DIR* dir = os::opendir(path);
3073 if (dir != NULL) {
3074 jio_fprintf(defaultStream::output_stream(),
3075 "<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n"
3076 "in modular form will be supported via the concept of upgradeable modules.\n");
3077 os::closedir(dir);
3078 return JNI_ERR;
3079 }
3080
3081 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep);
3082 dir = os::opendir(path);
3083 if (dir != NULL) {
3084 jio_fprintf(defaultStream::output_stream(),
3085 "<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; "
3086 "Use -classpath instead.\n.");
3087 os::closedir(dir);
3088 return JNI_ERR;
3089 }
3090
3091 // This must be done after all arguments have been processed
3092 // and the container support has been initialized since AggressiveHeap
3093 // relies on the amount of total memory available.
3094 if (AggressiveHeap) {
3095 jint result = set_aggressive_heap_flags();
3096 if (result != JNI_OK) {
3097 return result;
3098 }
3099 }
3100
3101 // This must be done after all arguments have been processed.
3102 // java_compiler() true means set to "NONE" or empty.
3103 if (java_compiler() && !xdebug_mode()) {
3104 // For backwards compatibility, we switch to interpreted mode if
3105 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was
3106 // not specified.
3107 set_mode_flags(_int);
3108 }
3109
3110 // CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode),
3111 // but like -Xint, leave compilation thresholds unaffected.
3112 // With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well.
3113 if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) {
3114 set_mode_flags(_int);
3115 }
3116
3117 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set
3118 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) {
3119 FLAG_SET_ERGO(InitialTenuringThreshold, MaxTenuringThreshold);
3120 }
3121
3122 #if !COMPILER2_OR_JVMCI
3123 // Don't degrade server performance for footprint
3124 if (FLAG_IS_DEFAULT(UseLargePages) &&
3125 MaxHeapSize < LargePageHeapSizeThreshold) {
3126 // No need for large granularity pages w/small heaps.
3127 // Note that large pages are enabled/disabled for both the
3128 // Java heap and the code cache.
3129 FLAG_SET_DEFAULT(UseLargePages, false);
3130 }
3131
3132 UNSUPPORTED_OPTION(ProfileInterpreter);
3133 NOT_PRODUCT(UNSUPPORTED_OPTION(TraceProfileInterpreter));
3134 #endif
3135
3136 #ifndef TIERED
3137 // Tiered compilation is undefined.
3138 UNSUPPORTED_OPTION(TieredCompilation);
3139 #endif
3140
3141 if (!check_vm_args_consistency()) {
3142 return JNI_ERR;
3143 }
3144
3145 #if INCLUDE_CDS
3146 if (DumpSharedSpaces) {
3147 // Disable biased locking now as it interferes with the clean up of
3148 // the archived Klasses and Java string objects (at dump time only).
3149 UseBiasedLocking = false;
3150
3151 // Compiler threads may concurrently update the class metadata (such as method entries), so it's
3152 // unsafe with DumpSharedSpaces (which modifies the class metadata in place). Let's disable
3153 // compiler just to be safe.
3154 //
3155 // Note: this is not a concern for DynamicDumpSharedSpaces, which makes a copy of the class metadata
3156 // instead of modifying them in place. The copy is inaccessible to the compiler.
3157 // TODO: revisit the following for the static archive case.
3158 set_mode_flags(_int);
3159 }
3160 if (DumpSharedSpaces || ArchiveClassesAtExit != NULL) {
3161 // Always verify non-system classes during CDS dump
3162 if (!BytecodeVerificationRemote) {
3163 BytecodeVerificationRemote = true;
3164 log_info(cds)("All non-system classes will be verified (-Xverify:remote) during CDS dump time.");
3165 }
3166 }
3167 if (ArchiveClassesAtExit == NULL) {
3168 FLAG_SET_DEFAULT(DynamicDumpSharedSpaces, false);
3169 }
3170 if (UseSharedSpaces && patch_mod_javabase) {
3171 no_shared_spaces("CDS is disabled when " JAVA_BASE_NAME " module is patched.");
3172 }
3173 if (UseSharedSpaces && !DumpSharedSpaces && check_unsupported_cds_runtime_properties()) {
3174 FLAG_SET_DEFAULT(UseSharedSpaces, false);
3175 }
3176 #endif
3177
3178 #ifndef CAN_SHOW_REGISTERS_ON_ASSERT
3179 UNSUPPORTED_OPTION(ShowRegistersOnAssert);
3180 #endif // CAN_SHOW_REGISTERS_ON_ASSERT
3181
3182 return JNI_OK;
3183 }
3184
3185 // Helper class for controlling the lifetime of JavaVMInitArgs
3186 // objects. The contents of the JavaVMInitArgs are guaranteed to be
3187 // deleted on the destruction of the ScopedVMInitArgs object.
3188 class ScopedVMInitArgs : public StackObj {
3189 private:
3190 JavaVMInitArgs _args;
3191 char* _container_name;
3192 bool _is_set;
3193 char* _vm_options_file_arg;
3194
3195 public:
3196 ScopedVMInitArgs(const char *container_name) {
3197 _args.version = JNI_VERSION_1_2;
3198 _args.nOptions = 0;
3199 _args.options = NULL;
3200 _args.ignoreUnrecognized = false;
3201 _container_name = (char *)container_name;
3202 _is_set = false;
3203 _vm_options_file_arg = NULL;
3204 }
3205
3206 // Populates the JavaVMInitArgs object represented by this
3207 // ScopedVMInitArgs object with the arguments in options. The
3208 // allocated memory is deleted by the destructor. If this method
3209 // returns anything other than JNI_OK, then this object is in a
3210 // partially constructed state, and should be abandoned.
3211 jint set_args(GrowableArray<JavaVMOption>* options) {
3212 _is_set = true;
3213 JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL(
3214 JavaVMOption, options->length(), mtArguments);
3215 if (options_arr == NULL) {
3216 return JNI_ENOMEM;
3217 }
3218 _args.options = options_arr;
3219
3220 for (int i = 0; i < options->length(); i++) {
3221 options_arr[i] = options->at(i);
3222 options_arr[i].optionString = os::strdup(options_arr[i].optionString);
3223 if (options_arr[i].optionString == NULL) {
3224 // Rely on the destructor to do cleanup.
3225 _args.nOptions = i;
3226 return JNI_ENOMEM;
3227 }
3228 }
3229
3230 _args.nOptions = options->length();
3231 _args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions;
3232 return JNI_OK;
3233 }
3234
3235 JavaVMInitArgs* get() { return &_args; }
3236 char* container_name() { return _container_name; }
3237 bool is_set() { return _is_set; }
3238 bool found_vm_options_file_arg() { return _vm_options_file_arg != NULL; }
3239 char* vm_options_file_arg() { return _vm_options_file_arg; }
3240
3241 void set_vm_options_file_arg(const char *vm_options_file_arg) {
3242 if (_vm_options_file_arg != NULL) {
3243 os::free(_vm_options_file_arg);
3244 }
3245 _vm_options_file_arg = os::strdup_check_oom(vm_options_file_arg);
3246 }
3247
3248 ~ScopedVMInitArgs() {
3249 if (_vm_options_file_arg != NULL) {
3250 os::free(_vm_options_file_arg);
3251 }
3252 if (_args.options == NULL) return;
3253 for (int i = 0; i < _args.nOptions; i++) {
3254 os::free(_args.options[i].optionString);
3255 }
3256 FREE_C_HEAP_ARRAY(JavaVMOption, _args.options);
3257 }
3258
3259 // Insert options into this option list, to replace option at
3260 // vm_options_file_pos (-XX:VMOptionsFile)
3261 jint insert(const JavaVMInitArgs* args,
3262 const JavaVMInitArgs* args_to_insert,
3263 const int vm_options_file_pos) {
3264 assert(_args.options == NULL, "shouldn't be set yet");
3265 assert(args_to_insert->nOptions != 0, "there should be args to insert");
3266 assert(vm_options_file_pos != -1, "vm_options_file_pos should be set");
3267
3268 int length = args->nOptions + args_to_insert->nOptions - 1;
3269 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments)
3270 GrowableArray<JavaVMOption>(length, true); // Construct new option array
3271 for (int i = 0; i < args->nOptions; i++) {
3272 if (i == vm_options_file_pos) {
3273 // insert the new options starting at the same place as the
3274 // -XX:VMOptionsFile option
3275 for (int j = 0; j < args_to_insert->nOptions; j++) {
3276 options->push(args_to_insert->options[j]);
3277 }
3278 } else {
3279 options->push(args->options[i]);
3280 }
3281 }
3282 // make into options array
3283 jint result = set_args(options);
3284 delete options;
3285 return result;
3286 }
3287 };
3288
3289 jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) {
3290 return parse_options_environment_variable("_JAVA_OPTIONS", args);
3291 }
3292
3293 jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) {
3294 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args);
3295 }
3296
3297 jint Arguments::parse_options_environment_variable(const char* name,
3298 ScopedVMInitArgs* vm_args) {
3299 char *buffer = ::getenv(name);
3300
3301 // Don't check this environment variable if user has special privileges
3302 // (e.g. unix su command).
3303 if (buffer == NULL || os::have_special_privileges()) {
3304 return JNI_OK;
3305 }
3306
3307 if ((buffer = os::strdup(buffer)) == NULL) {
3308 return JNI_ENOMEM;
3309 }
3310
3311 jio_fprintf(defaultStream::error_stream(),
3312 "Picked up %s: %s\n", name, buffer);
3313
3314 int retcode = parse_options_buffer(name, buffer, strlen(buffer), vm_args);
3315
3316 os::free(buffer);
3317 return retcode;
3318 }
3319
3320 jint Arguments::parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args) {
3321 // read file into buffer
3322 int fd = ::open(file_name, O_RDONLY);
3323 if (fd < 0) {
3324 jio_fprintf(defaultStream::error_stream(),
3325 "Could not open options file '%s'\n",
3326 file_name);
3327 return JNI_ERR;
3328 }
3329
3330 struct stat stbuf;
3331 int retcode = os::stat(file_name, &stbuf);
3332 if (retcode != 0) {
3333 jio_fprintf(defaultStream::error_stream(),
3334 "Could not stat options file '%s'\n",
3335 file_name);
3336 os::close(fd);
3337 return JNI_ERR;
3338 }
3339
3340 if (stbuf.st_size == 0) {
3341 // tell caller there is no option data and that is ok
3342 os::close(fd);
3343 return JNI_OK;
3344 }
3345
3346 // '+ 1' for NULL termination even with max bytes
3347 size_t bytes_alloc = stbuf.st_size + 1;
3348
3349 char *buf = NEW_C_HEAP_ARRAY_RETURN_NULL(char, bytes_alloc, mtArguments);
3350 if (NULL == buf) {
3351 jio_fprintf(defaultStream::error_stream(),
3352 "Could not allocate read buffer for options file parse\n");
3353 os::close(fd);
3354 return JNI_ENOMEM;
3355 }
3356
3357 memset(buf, 0, bytes_alloc);
3358
3359 // Fill buffer
3360 ssize_t bytes_read = os::read(fd, (void *)buf, (unsigned)bytes_alloc);
3361 os::close(fd);
3362 if (bytes_read < 0) {
3363 FREE_C_HEAP_ARRAY(char, buf);
3364 jio_fprintf(defaultStream::error_stream(),
3365 "Could not read options file '%s'\n", file_name);
3366 return JNI_ERR;
3367 }
3368
3369 if (bytes_read == 0) {
3370 // tell caller there is no option data and that is ok
3371 FREE_C_HEAP_ARRAY(char, buf);
3372 return JNI_OK;
3373 }
3374
3375 retcode = parse_options_buffer(file_name, buf, bytes_read, vm_args);
3376
3377 FREE_C_HEAP_ARRAY(char, buf);
3378 return retcode;
3379 }
3380
3381 jint Arguments::parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args) {
3382 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<JavaVMOption>(2, true); // Construct option array
3383
3384 // some pointers to help with parsing
3385 char *buffer_end = buffer + buf_len;
3386 char *opt_hd = buffer;
3387 char *wrt = buffer;
3388 char *rd = buffer;
3389
3390 // parse all options
3391 while (rd < buffer_end) {
3392 // skip leading white space from the input string
3393 while (rd < buffer_end && isspace(*rd)) {
3394 rd++;
3395 }
3396
3397 if (rd >= buffer_end) {
3398 break;
3399 }
3400
3401 // Remember this is where we found the head of the token.
3402 opt_hd = wrt;
3403
3404 // Tokens are strings of non white space characters separated
3405 // by one or more white spaces.
3406 while (rd < buffer_end && !isspace(*rd)) {
3407 if (*rd == '\'' || *rd == '"') { // handle a quoted string
3408 int quote = *rd; // matching quote to look for
3409 rd++; // don't copy open quote
3410 while (rd < buffer_end && *rd != quote) {
3411 // include everything (even spaces)
3412 // up until the close quote
3413 *wrt++ = *rd++; // copy to option string
3414 }
3415
3416 if (rd < buffer_end) {
3417 rd++; // don't copy close quote
3418 } else {
3419 // did not see closing quote
3420 jio_fprintf(defaultStream::error_stream(),
3421 "Unmatched quote in %s\n", name);
3422 delete options;
3423 return JNI_ERR;
3424 }
3425 } else {
3426 *wrt++ = *rd++; // copy to option string
3427 }
3428 }
3429
3430 // steal a white space character and set it to NULL
3431 *wrt++ = '\0';
3432 // We now have a complete token
3433
3434 JavaVMOption option;
3435 option.optionString = opt_hd;
3436 option.extraInfo = NULL;
3437
3438 options->append(option); // Fill in option
3439
3440 rd++; // Advance to next character
3441 }
3442
3443 // Fill out JavaVMInitArgs structure.
3444 jint status = vm_args->set_args(options);
3445
3446 delete options;
3447 return status;
3448 }
3449
3450 void Arguments::set_shared_spaces_flags() {
3451 if (DumpSharedSpaces) {
3452 if (RequireSharedSpaces) {
3453 warning("Cannot dump shared archive while using shared archive");
3454 }
3455 UseSharedSpaces = false;
3456 #ifdef _LP64
3457 if (!UseCompressedOops || !UseCompressedClassPointers) {
3458 vm_exit_during_initialization(
3459 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL);
3460 }
3461 } else {
3462 if (!UseCompressedOops || !UseCompressedClassPointers) {
3463 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces.");
3464 }
3465 #endif
3466 }
3467 }
3468
3469 #if INCLUDE_CDS
3470 // Sharing support
3471 // Construct the path to the archive
3472 char* Arguments::get_default_shared_archive_path() {
3473 char *default_archive_path;
3474 char jvm_path[JVM_MAXPATHLEN];
3475 os::jvm_path(jvm_path, sizeof(jvm_path));
3476 char *end = strrchr(jvm_path, *os::file_separator());
3477 if (end != NULL) *end = '\0';
3478 size_t jvm_path_len = strlen(jvm_path);
3479 size_t file_sep_len = strlen(os::file_separator());
3480 const size_t len = jvm_path_len + file_sep_len + 20;
3481 default_archive_path = NEW_C_HEAP_ARRAY(char, len, mtArguments);
3482 if (default_archive_path != NULL) {
3483 jio_snprintf(default_archive_path, len, "%s%sclasses.jsa",
3484 jvm_path, os::file_separator());
3485 }
3486 return default_archive_path;
3487 }
3488
3489 int Arguments::num_archives(const char* archive_path) {
3490 if (archive_path == NULL) {
3491 return 0;
3492 }
3493 int npaths = 1;
3494 char* p = (char*)archive_path;
3495 while (*p != '\0') {
3496 if (*p == os::path_separator()[0]) {
3497 npaths++;
3498 }
3499 p++;
3500 }
3501 return npaths;
3502 }
3503
3504 void Arguments::extract_shared_archive_paths(const char* archive_path,
3505 char** base_archive_path,
3506 char** top_archive_path) {
3507 char* begin_ptr = (char*)archive_path;
3508 char* end_ptr = strchr((char*)archive_path, os::path_separator()[0]);
3509 if (end_ptr == NULL || end_ptr == begin_ptr) {
3510 vm_exit_during_initialization("Base archive was not specified", archive_path);
3511 }
3512 size_t len = end_ptr - begin_ptr;
3513 char* cur_path = NEW_C_HEAP_ARRAY(char, len + 1, mtInternal);
3514 strncpy(cur_path, begin_ptr, len);
3515 cur_path[len] = '\0';
3516 FileMapInfo::check_archive((const char*)cur_path, true /*is_static*/);
3517 *base_archive_path = cur_path;
3518
3519 begin_ptr = ++end_ptr;
3520 if (*begin_ptr == '\0') {
3521 vm_exit_during_initialization("Top archive was not specified", archive_path);
3522 }
3523 end_ptr = strchr(begin_ptr, '\0');
3524 assert(end_ptr != NULL, "sanity");
3525 len = end_ptr - begin_ptr;
3526 cur_path = NEW_C_HEAP_ARRAY(char, len + 1, mtInternal);
3527 strncpy(cur_path, begin_ptr, len + 1);
3528 //cur_path[len] = '\0';
3529 FileMapInfo::check_archive((const char*)cur_path, false /*is_static*/);
3530 *top_archive_path = cur_path;
3531 }
3532
3533 bool Arguments::init_shared_archive_paths() {
3534 if (ArchiveClassesAtExit != NULL) {
3535 if (DumpSharedSpaces) {
3536 vm_exit_during_initialization("-XX:ArchiveClassesAtExit cannot be used with -Xshare:dump");
3537 }
3538 if (FLAG_SET_CMDLINE(DynamicDumpSharedSpaces, true) != JVMFlag::SUCCESS) {
3539 return false;
3540 }
3541 check_unsupported_dumping_properties();
3542 SharedDynamicArchivePath = os::strdup_check_oom(ArchiveClassesAtExit, mtArguments);
3543 }
3544 if (SharedArchiveFile == NULL) {
3545 SharedArchivePath = get_default_shared_archive_path();
3546 } else {
3547 int archives = num_archives(SharedArchiveFile);
3548 if (DynamicDumpSharedSpaces || DumpSharedSpaces) {
3549 if (archives > 1) {
3550 vm_exit_during_initialization(
3551 "Cannot have more than 1 archive file specified in -XX:SharedArchiveFile during CDS dumping");
3552 }
3553 if (DynamicDumpSharedSpaces) {
3554 if (os::same_files(SharedArchiveFile, ArchiveClassesAtExit)) {
3555 vm_exit_during_initialization(
3556 "Cannot have the same archive file specified for -XX:SharedArchiveFile and -XX:ArchiveClassesAtExit",
3557 SharedArchiveFile);
3558 }
3559 }
3560 }
3561 if (!DynamicDumpSharedSpaces && !DumpSharedSpaces){
3562 if (archives > 2) {
3563 vm_exit_during_initialization(
3564 "Cannot have more than 2 archive files specified in the -XX:SharedArchiveFile option");
3565 }
3566 if (archives == 1) {
3567 char* temp_archive_path = os::strdup_check_oom(SharedArchiveFile, mtArguments);
3568 int name_size;
3569 bool success =
3570 FileMapInfo::get_base_archive_name_from_header(temp_archive_path, &name_size, &SharedArchivePath);
3571 if (!success) {
3572 SharedArchivePath = temp_archive_path;
3573 } else {
3574 SharedDynamicArchivePath = temp_archive_path;
3575 }
3576 } else {
3577 extract_shared_archive_paths((const char*)SharedArchiveFile,
3578 &SharedArchivePath, &SharedDynamicArchivePath);
3579 }
3580 } else { // CDS dumping
3581 SharedArchivePath = os::strdup_check_oom(SharedArchiveFile, mtArguments);
3582 }
3583 }
3584 return (SharedArchivePath != NULL);
3585 }
3586 #endif // INCLUDE_CDS
3587
3588 #ifndef PRODUCT
3589 // Determine whether LogVMOutput should be implicitly turned on.
3590 static bool use_vm_log() {
3591 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) ||
3592 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods ||
3593 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers ||
3594 PrintAssembly || TraceDeoptimization || TraceDependencies ||
3595 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) {
3596 return true;
3597 }
3598
3599 #ifdef COMPILER1
3600 if (PrintC1Statistics) {
3601 return true;
3602 }
3603 #endif // COMPILER1
3604
3605 #ifdef COMPILER2
3606 if (PrintOptoAssembly || PrintOptoStatistics) {
3607 return true;
3608 }
3609 #endif // COMPILER2
3610
3611 return false;
3612 }
3613
3614 #endif // PRODUCT
3615
3616 bool Arguments::args_contains_vm_options_file_arg(const JavaVMInitArgs* args) {
3617 for (int index = 0; index < args->nOptions; index++) {
3618 const JavaVMOption* option = args->options + index;
3619 const char* tail;
3620 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
3621 return true;
3622 }
3623 }
3624 return false;
3625 }
3626
3627 jint Arguments::insert_vm_options_file(const JavaVMInitArgs* args,
3628 const char* vm_options_file,
3629 const int vm_options_file_pos,
3630 ScopedVMInitArgs* vm_options_file_args,
3631 ScopedVMInitArgs* args_out) {
3632 jint code = parse_vm_options_file(vm_options_file, vm_options_file_args);
3633 if (code != JNI_OK) {
3634 return code;
3635 }
3636
3637 if (vm_options_file_args->get()->nOptions < 1) {
3638 return JNI_OK;
3639 }
3640
3641 if (args_contains_vm_options_file_arg(vm_options_file_args->get())) {
3642 jio_fprintf(defaultStream::error_stream(),
3643 "A VM options file may not refer to a VM options file. "
3644 "Specification of '-XX:VMOptionsFile=<file-name>' in the "
3645 "options file '%s' in options container '%s' is an error.\n",
3646 vm_options_file_args->vm_options_file_arg(),
3647 vm_options_file_args->container_name());
3648 return JNI_EINVAL;
3649 }
3650
3651 return args_out->insert(args, vm_options_file_args->get(),
3652 vm_options_file_pos);
3653 }
3654
3655 // Expand -XX:VMOptionsFile found in args_in as needed.
3656 // mod_args and args_out parameters may return values as needed.
3657 jint Arguments::expand_vm_options_as_needed(const JavaVMInitArgs* args_in,
3658 ScopedVMInitArgs* mod_args,
3659 JavaVMInitArgs** args_out) {
3660 jint code = match_special_option_and_act(args_in, mod_args);
3661 if (code != JNI_OK) {
3662 return code;
3663 }
3664
3665 if (mod_args->is_set()) {
3666 // args_in contains -XX:VMOptionsFile and mod_args contains the
3667 // original options from args_in along with the options expanded
3668 // from the VMOptionsFile. Return a short-hand to the caller.
3669 *args_out = mod_args->get();
3670 } else {
3671 *args_out = (JavaVMInitArgs *)args_in; // no changes so use args_in
3672 }
3673 return JNI_OK;
3674 }
3675
3676 jint Arguments::match_special_option_and_act(const JavaVMInitArgs* args,
3677 ScopedVMInitArgs* args_out) {
3678 // Remaining part of option string
3679 const char* tail;
3680 ScopedVMInitArgs vm_options_file_args(args_out->container_name());
3681
3682 for (int index = 0; index < args->nOptions; index++) {
3683 const JavaVMOption* option = args->options + index;
3684 if (match_option(option, "-XX:Flags=", &tail)) {
3685 Arguments::set_jvm_flags_file(tail);
3686 continue;
3687 }
3688 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
3689 if (vm_options_file_args.found_vm_options_file_arg()) {
3690 jio_fprintf(defaultStream::error_stream(),
3691 "The option '%s' is already specified in the options "
3692 "container '%s' so the specification of '%s' in the "
3693 "same options container is an error.\n",
3694 vm_options_file_args.vm_options_file_arg(),
3695 vm_options_file_args.container_name(),
3696 option->optionString);
3697 return JNI_EINVAL;
3698 }
3699 vm_options_file_args.set_vm_options_file_arg(option->optionString);
3700 // If there's a VMOptionsFile, parse that
3701 jint code = insert_vm_options_file(args, tail, index,
3702 &vm_options_file_args, args_out);
3703 if (code != JNI_OK) {
3704 return code;
3705 }
3706 args_out->set_vm_options_file_arg(vm_options_file_args.vm_options_file_arg());
3707 if (args_out->is_set()) {
3708 // The VMOptions file inserted some options so switch 'args'
3709 // to the new set of options, and continue processing which
3710 // preserves "last option wins" semantics.
3711 args = args_out->get();
3712 // The first option from the VMOptionsFile replaces the
3713 // current option. So we back track to process the
3714 // replacement option.
3715 index--;
3716 }
3717 continue;
3718 }
3719 if (match_option(option, "-XX:+PrintVMOptions")) {
3720 PrintVMOptions = true;
3721 continue;
3722 }
3723 if (match_option(option, "-XX:-PrintVMOptions")) {
3724 PrintVMOptions = false;
3725 continue;
3726 }
3727 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) {
3728 IgnoreUnrecognizedVMOptions = true;
3729 continue;
3730 }
3731 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) {
3732 IgnoreUnrecognizedVMOptions = false;
3733 continue;
3734 }
3735 if (match_option(option, "-XX:+PrintFlagsInitial")) {
3736 JVMFlag::printFlags(tty, false);
3737 vm_exit(0);
3738 }
3739 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) {
3740 #if INCLUDE_NMT
3741 // The launcher did not setup nmt environment variable properly.
3742 if (!MemTracker::check_launcher_nmt_support(tail)) {
3743 warning("Native Memory Tracking did not setup properly, using wrong launcher?");
3744 }
3745
3746 // Verify if nmt option is valid.
3747 if (MemTracker::verify_nmt_option()) {
3748 // Late initialization, still in single-threaded mode.
3749 if (MemTracker::tracking_level() >= NMT_summary) {
3750 MemTracker::init();
3751 }
3752 } else {
3753 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL);
3754 }
3755 continue;
3756 #else
3757 jio_fprintf(defaultStream::error_stream(),
3758 "Native Memory Tracking is not supported in this VM\n");
3759 return JNI_ERR;
3760 #endif
3761 }
3762
3763 #ifndef PRODUCT
3764 if (match_option(option, "-XX:+PrintFlagsWithComments")) {
3765 JVMFlag::printFlags(tty, true);
3766 vm_exit(0);
3767 }
3768 #endif
3769 }
3770 return JNI_OK;
3771 }
3772
3773 static void print_options(const JavaVMInitArgs *args) {
3774 const char* tail;
3775 for (int index = 0; index < args->nOptions; index++) {
3776 const JavaVMOption *option = args->options + index;
3777 if (match_option(option, "-XX:", &tail)) {
3778 logOption(tail);
3779 }
3780 }
3781 }
3782
3783 bool Arguments::handle_deprecated_print_gc_flags() {
3784 if (PrintGC) {
3785 log_warning(gc)("-XX:+PrintGC is deprecated. Will use -Xlog:gc instead.");
3786 }
3787 if (PrintGCDetails) {
3788 log_warning(gc)("-XX:+PrintGCDetails is deprecated. Will use -Xlog:gc* instead.");
3789 }
3790
3791 if (_gc_log_filename != NULL) {
3792 // -Xloggc was used to specify a filename
3793 const char* gc_conf = PrintGCDetails ? "gc*" : "gc";
3794
3795 LogTarget(Error, logging) target;
3796 LogStream errstream(target);
3797 return LogConfiguration::parse_log_arguments(_gc_log_filename, gc_conf, NULL, NULL, &errstream);
3798 } else if (PrintGC || PrintGCDetails) {
3799 LogConfiguration::configure_stdout(LogLevel::Info, !PrintGCDetails, LOG_TAGS(gc));
3800 }
3801 return true;
3802 }
3803
3804 void Arguments::handle_extra_cms_flags(const char* msg) {
3805 SpecialFlag flag;
3806 const char *flag_name = "UseConcMarkSweepGC";
3807 if (lookup_special_flag(flag_name, flag)) {
3808 handle_aliases_and_deprecation(flag_name, /* print warning */ true);
3809 warning("%s", msg);
3810 }
3811 }
3812
3813 // Parse entry point called from JNI_CreateJavaVM
3814
3815 jint Arguments::parse(const JavaVMInitArgs* initial_cmd_args) {
3816 assert(verify_special_jvm_flags(), "deprecated and obsolete flag table inconsistent");
3817
3818 // Initialize ranges, constraints and writeables
3819 JVMFlagRangeList::init();
3820 JVMFlagConstraintList::init();
3821 JVMFlagWriteableList::init();
3822
3823 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed.
3824 const char* hotspotrc = ".hotspotrc";
3825 bool settings_file_specified = false;
3826 bool needs_hotspotrc_warning = false;
3827 ScopedVMInitArgs initial_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
3828 ScopedVMInitArgs initial_java_options_args("env_var='_JAVA_OPTIONS'");
3829
3830 // Pointers to current working set of containers
3831 JavaVMInitArgs* cur_cmd_args;
3832 JavaVMInitArgs* cur_java_options_args;
3833 JavaVMInitArgs* cur_java_tool_options_args;
3834
3835 // Containers for modified/expanded options
3836 ScopedVMInitArgs mod_cmd_args("cmd_line_args");
3837 ScopedVMInitArgs mod_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
3838 ScopedVMInitArgs mod_java_options_args("env_var='_JAVA_OPTIONS'");
3839
3840
3841 jint code =
3842 parse_java_tool_options_environment_variable(&initial_java_tool_options_args);
3843 if (code != JNI_OK) {
3844 return code;
3845 }
3846
3847 code = parse_java_options_environment_variable(&initial_java_options_args);
3848 if (code != JNI_OK) {
3849 return code;
3850 }
3851
3852 code = expand_vm_options_as_needed(initial_java_tool_options_args.get(),
3853 &mod_java_tool_options_args,
3854 &cur_java_tool_options_args);
3855 if (code != JNI_OK) {
3856 return code;
3857 }
3858
3859 code = expand_vm_options_as_needed(initial_cmd_args,
3860 &mod_cmd_args,
3861 &cur_cmd_args);
3862 if (code != JNI_OK) {
3863 return code;
3864 }
3865
3866 code = expand_vm_options_as_needed(initial_java_options_args.get(),
3867 &mod_java_options_args,
3868 &cur_java_options_args);
3869 if (code != JNI_OK) {
3870 return code;
3871 }
3872
3873 const char* flags_file = Arguments::get_jvm_flags_file();
3874 settings_file_specified = (flags_file != NULL);
3875
3876 if (IgnoreUnrecognizedVMOptions) {
3877 cur_cmd_args->ignoreUnrecognized = true;
3878 cur_java_tool_options_args->ignoreUnrecognized = true;
3879 cur_java_options_args->ignoreUnrecognized = true;
3880 }
3881
3882 // Parse specified settings file
3883 if (settings_file_specified) {
3884 if (!process_settings_file(flags_file, true,
3885 cur_cmd_args->ignoreUnrecognized)) {
3886 return JNI_EINVAL;
3887 }
3888 } else {
3889 #ifdef ASSERT
3890 // Parse default .hotspotrc settings file
3891 if (!process_settings_file(".hotspotrc", false,
3892 cur_cmd_args->ignoreUnrecognized)) {
3893 return JNI_EINVAL;
3894 }
3895 #else
3896 struct stat buf;
3897 if (os::stat(hotspotrc, &buf) == 0) {
3898 needs_hotspotrc_warning = true;
3899 }
3900 #endif
3901 }
3902
3903 if (PrintVMOptions) {
3904 print_options(cur_java_tool_options_args);
3905 print_options(cur_cmd_args);
3906 print_options(cur_java_options_args);
3907 }
3908
3909 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS
3910 jint result = parse_vm_init_args(cur_java_tool_options_args,
3911 cur_java_options_args,
3912 cur_cmd_args);
3913
3914 if (result != JNI_OK) {
3915 return result;
3916 }
3917
3918 #if INCLUDE_CDS
3919 // Initialize shared archive paths which could include both base and dynamic archive paths
3920 if (!init_shared_archive_paths()) {
3921 return JNI_ENOMEM;
3922 }
3923 #endif
3924
3925 // Delay warning until here so that we've had a chance to process
3926 // the -XX:-PrintWarnings flag
3927 if (needs_hotspotrc_warning) {
3928 warning("%s file is present but has been ignored. "
3929 "Run with -XX:Flags=%s to load the file.",
3930 hotspotrc, hotspotrc);
3931 }
3932
3933 if (needs_module_property_warning) {
3934 warning("Ignoring system property options whose names match the '-Djdk.module.*'."
3935 " names that are reserved for internal use.");
3936 }
3937
3938 #if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
3939 UNSUPPORTED_OPTION(UseLargePages);
3940 #endif
3941
3942 #if defined(AIX)
3943 UNSUPPORTED_OPTION_NULL(AllocateHeapAt);
3944 UNSUPPORTED_OPTION_NULL(AllocateOldGenAt);
3945 #endif
3946
3947 #ifndef PRODUCT
3948 if (TraceBytecodesAt != 0) {
3949 TraceBytecodes = true;
3950 }
3951 if (CountCompiledCalls) {
3952 if (UseCounterDecay) {
3953 warning("UseCounterDecay disabled because CountCalls is set");
3954 UseCounterDecay = false;
3955 }
3956 }
3957 #endif // PRODUCT
3958
3959 if (ScavengeRootsInCode == 0) {
3960 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) {
3961 warning("Forcing ScavengeRootsInCode non-zero");
3962 }
3963 ScavengeRootsInCode = 1;
3964 }
3965
3966 if (!handle_deprecated_print_gc_flags()) {
3967 return JNI_EINVAL;
3968 }
3969
3970 // Set object alignment values.
3971 set_object_alignment();
3972
3973 #if !INCLUDE_CDS
3974 if (DumpSharedSpaces || RequireSharedSpaces) {
3975 jio_fprintf(defaultStream::error_stream(),
3976 "Shared spaces are not supported in this VM\n");
3977 return JNI_ERR;
3978 }
3979 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) ||
3980 log_is_enabled(Info, cds)) {
3981 warning("Shared spaces are not supported in this VM");
3982 FLAG_SET_DEFAULT(UseSharedSpaces, false);
3983 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(cds));
3984 }
3985 no_shared_spaces("CDS Disabled");
3986 #endif // INCLUDE_CDS
3987
3988 return JNI_OK;
3989 }
3990
3991 jint Arguments::apply_ergo() {
3992 // Set flags based on ergonomics.
3993 jint result = set_ergonomics_flags();
3994 if (result != JNI_OK) return result;
3995
3996 // Set heap size based on available physical memory
3997 set_heap_size();
3998
3999 GCConfig::arguments()->initialize();
4000
4001 set_shared_spaces_flags();
4002
4003 // Initialize Metaspace flags and alignments
4004 Metaspace::ergo_initialize();
4005
4006 // Set compiler flags after GC is selected and GC specific
4007 // flags (LoopStripMiningIter) are set.
4008 CompilerConfig::ergo_initialize();
4009
4010 // Set bytecode rewriting flags
4011 set_bytecode_flags();
4012
4013 // Set flags if aggressive optimization flags are enabled
4014 jint code = set_aggressive_opts_flags();
4015 if (code != JNI_OK) {
4016 return code;
4017 }
4018
4019 // Turn off biased locking for locking debug mode flags,
4020 // which are subtly different from each other but neither works with
4021 // biased locking
4022 if (UseHeavyMonitors
4023 #ifdef COMPILER1
4024 || !UseFastLocking
4025 #endif // COMPILER1
4026 #if INCLUDE_JVMCI
4027 || !JVMCIUseFastLocking
4028 #endif
4029 ) {
4030 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) {
4031 // flag set to true on command line; warn the user that they
4032 // can't enable biased locking here
4033 warning("Biased Locking is not supported with locking debug flags"
4034 "; ignoring UseBiasedLocking flag." );
4035 }
4036 UseBiasedLocking = false;
4037 }
4038
4039 #ifdef CC_INTERP
4040 // Clear flags not supported on zero.
4041 FLAG_SET_DEFAULT(ProfileInterpreter, false);
4042 FLAG_SET_DEFAULT(UseBiasedLocking, false);
4043 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false));
4044 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false));
4045 #endif // CC_INTERP
4046
4047 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) {
4048 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output");
4049 DebugNonSafepoints = true;
4050 }
4051
4052 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) {
4053 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used");
4054 }
4055
4056 // Treat the odd case where local verification is enabled but remote
4057 // verification is not as if both were enabled.
4058 if (BytecodeVerificationLocal && !BytecodeVerificationRemote) {
4059 log_info(verification)("Turning on remote verification because local verification is on");
4060 FLAG_SET_DEFAULT(BytecodeVerificationRemote, true);
4061 }
4062
4063 #ifndef PRODUCT
4064 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) {
4065 if (use_vm_log()) {
4066 LogVMOutput = true;
4067 }
4068 }
4069 #endif // PRODUCT
4070
4071 if (PrintCommandLineFlags) {
4072 JVMFlag::printSetFlags(tty);
4073 }
4074
4075 // Apply CPU specific policy for the BiasedLocking
4076 if (UseBiasedLocking) {
4077 if (!VM_Version::use_biased_locking() &&
4078 !(FLAG_IS_CMDLINE(UseBiasedLocking))) {
4079 UseBiasedLocking = false;
4080 }
4081 }
4082 #ifdef COMPILER2
4083 if (!UseBiasedLocking) {
4084 UseOptoBiasInlining = false;
4085 }
4086 #endif
4087
4088 #if defined(IA32)
4089 // Only server compiler can optimize safepoints well enough.
4090 if (!is_server_compilation_mode_vm()) {
4091 FLAG_SET_ERGO_IF_DEFAULT(ThreadLocalHandshakes, false);
4092 }
4093 #endif
4094
4095 // ThreadLocalHandshakesConstraintFunc handles the constraints.
4096 if (FLAG_IS_DEFAULT(ThreadLocalHandshakes) || !SafepointMechanism::supports_thread_local_poll()) {
4097 log_debug(ergo)("ThreadLocalHandshakes %s", ThreadLocalHandshakes ? "enabled." : "disabled.");
4098 } else {
4099 log_info(ergo)("ThreadLocalHandshakes %s", ThreadLocalHandshakes ? "enabled." : "disabled.");
4100 }
4101
4102 return JNI_OK;
4103 }
4104
4105 jint Arguments::adjust_after_os() {
4106 if (UseNUMA) {
4107 if (!FLAG_IS_DEFAULT(AllocateHeapAt)) {
4108 FLAG_SET_ERGO(UseNUMA, false);
4109 } else if (UseParallelGC || UseParallelOldGC) {
4110 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) {
4111 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M);
4112 }
4113 }
4114 // UseNUMAInterleaving is set to ON for all collectors and
4115 // platforms when UseNUMA is set to ON. NUMA-aware collectors
4116 // such as Parallel GC for Linux and Solaris or G1 GC for Linux will
4117 // interleave old gen and survivor spaces on top of NUMA
4118 // allocation policy for the eden space.
4119 // Non NUMA-aware collectors such as CMS and Serial-GC on
4120 // all platforms and ParallelGC on Windows will interleave all
4121 // of the heap spaces across NUMA nodes.
4122 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) {
4123 FLAG_SET_ERGO(UseNUMAInterleaving, true);
4124 }
4125 }
4126 return JNI_OK;
4127 }
4128
4129 int Arguments::PropertyList_count(SystemProperty* pl) {
4130 int count = 0;
4131 while(pl != NULL) {
4132 count++;
4133 pl = pl->next();
4134 }
4135 return count;
4136 }
4137
4138 // Return the number of readable properties.
4139 int Arguments::PropertyList_readable_count(SystemProperty* pl) {
4140 int count = 0;
4141 while(pl != NULL) {
4142 if (pl->is_readable()) {
4143 count++;
4144 }
4145 pl = pl->next();
4146 }
4147 return count;
4148 }
4149
4150 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) {
4151 assert(key != NULL, "just checking");
4152 SystemProperty* prop;
4153 for (prop = pl; prop != NULL; prop = prop->next()) {
4154 if (strcmp(key, prop->key()) == 0) return prop->value();
4155 }
4156 return NULL;
4157 }
4158
4159 // Return the value of the requested property provided that it is a readable property.
4160 const char* Arguments::PropertyList_get_readable_value(SystemProperty *pl, const char* key) {
4161 assert(key != NULL, "just checking");
4162 SystemProperty* prop;
4163 // Return the property value if the keys match and the property is not internal or
4164 // it's the special internal property "jdk.boot.class.path.append".
4165 for (prop = pl; prop != NULL; prop = prop->next()) {
4166 if (strcmp(key, prop->key()) == 0) {
4167 if (!prop->internal()) {
4168 return prop->value();
4169 } else if (strcmp(key, "jdk.boot.class.path.append") == 0) {
4170 return prop->value();
4171 } else {
4172 // Property is internal and not jdk.boot.class.path.append so return NULL.
4173 return NULL;
4174 }
4175 }
4176 }
4177 return NULL;
4178 }
4179
4180 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) {
4181 int count = 0;
4182 const char* ret_val = NULL;
4183
4184 while(pl != NULL) {
4185 if(count >= index) {
4186 ret_val = pl->key();
4187 break;
4188 }
4189 count++;
4190 pl = pl->next();
4191 }
4192
4193 return ret_val;
4194 }
4195
4196 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) {
4197 int count = 0;
4198 char* ret_val = NULL;
4199
4200 while(pl != NULL) {
4201 if(count >= index) {
4202 ret_val = pl->value();
4203 break;
4204 }
4205 count++;
4206 pl = pl->next();
4207 }
4208
4209 return ret_val;
4210 }
4211
4212 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) {
4213 SystemProperty* p = *plist;
4214 if (p == NULL) {
4215 *plist = new_p;
4216 } else {
4217 while (p->next() != NULL) {
4218 p = p->next();
4219 }
4220 p->set_next(new_p);
4221 }
4222 }
4223
4224 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v,
4225 bool writeable, bool internal) {
4226 if (plist == NULL)
4227 return;
4228
4229 SystemProperty* new_p = new SystemProperty(k, v, writeable, internal);
4230 PropertyList_add(plist, new_p);
4231 }
4232
4233 void Arguments::PropertyList_add(SystemProperty *element) {
4234 PropertyList_add(&_system_properties, element);
4235 }
4236
4237 // This add maintains unique property key in the list.
4238 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v,
4239 PropertyAppendable append, PropertyWriteable writeable,
4240 PropertyInternal internal) {
4241 if (plist == NULL)
4242 return;
4243
4244 // If property key exist then update with new value.
4245 SystemProperty* prop;
4246 for (prop = *plist; prop != NULL; prop = prop->next()) {
4247 if (strcmp(k, prop->key()) == 0) {
4248 if (append == AppendProperty) {
4249 prop->append_value(v);
4250 } else {
4251 prop->set_value(v);
4252 }
4253 return;
4254 }
4255 }
4256
4257 PropertyList_add(plist, k, v, writeable == WriteableProperty, internal == InternalProperty);
4258 }
4259
4260 // Copies src into buf, replacing "%%" with "%" and "%p" with pid
4261 // Returns true if all of the source pointed by src has been copied over to
4262 // the destination buffer pointed by buf. Otherwise, returns false.
4263 // Notes:
4264 // 1. If the length (buflen) of the destination buffer excluding the
4265 // NULL terminator character is not long enough for holding the expanded
4266 // pid characters, it also returns false instead of returning the partially
4267 // expanded one.
4268 // 2. The passed in "buflen" should be large enough to hold the null terminator.
4269 bool Arguments::copy_expand_pid(const char* src, size_t srclen,
4270 char* buf, size_t buflen) {
4271 const char* p = src;
4272 char* b = buf;
4273 const char* src_end = &src[srclen];
4274 char* buf_end = &buf[buflen - 1];
4275
4276 while (p < src_end && b < buf_end) {
4277 if (*p == '%') {
4278 switch (*(++p)) {
4279 case '%': // "%%" ==> "%"
4280 *b++ = *p++;
4281 break;
4282 case 'p': { // "%p" ==> current process id
4283 // buf_end points to the character before the last character so
4284 // that we could write '\0' to the end of the buffer.
4285 size_t buf_sz = buf_end - b + 1;
4286 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id());
4287
4288 // if jio_snprintf fails or the buffer is not long enough to hold
4289 // the expanded pid, returns false.
4290 if (ret < 0 || ret >= (int)buf_sz) {
4291 return false;
4292 } else {
4293 b += ret;
4294 assert(*b == '\0', "fail in copy_expand_pid");
4295 if (p == src_end && b == buf_end + 1) {
4296 // reach the end of the buffer.
4297 return true;
4298 }
4299 }
4300 p++;
4301 break;
4302 }
4303 default :
4304 *b++ = '%';
4305 }
4306 } else {
4307 *b++ = *p++;
4308 }
4309 }
4310 *b = '\0';
4311 return (p == src_end); // return false if not all of the source was copied
4312 }