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