1 /*
2 * Copyright (c) 1997, 2018, 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/collectorPolicy.hpp"
33 #include "gc/shared/gcArguments.hpp"
34 #include "gc/shared/gcConfig.hpp"
35 #include "logging/log.hpp"
36 #include "logging/logConfiguration.hpp"
37 #include "logging/logStream.hpp"
38 #include "logging/logTag.hpp"
39 #include "memory/allocation.inline.hpp"
40 #include "memory/universe.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "prims/jvmtiExport.hpp"
43 #include "runtime/arguments.hpp"
44 #include "runtime/arguments_ext.hpp"
45 #include "runtime/flags/jvmFlag.hpp"
46 #include "runtime/flags/jvmFlagConstraintList.hpp"
47 #include "runtime/flags/jvmFlagWriteableList.hpp"
48 #include "runtime/flags/jvmFlagRangeList.hpp"
49 #include "runtime/globals_extension.hpp"
50 #include "runtime/java.hpp"
51 #include "runtime/os.inline.hpp"
52 #include "runtime/safepoint.hpp"
53 #include "runtime/safepointMechanism.hpp"
54 #include "runtime/vm_version.hpp"
55 #include "services/management.hpp"
56 #include "services/memTracker.hpp"
57 #include "utilities/align.hpp"
58 #include "utilities/defaultStream.hpp"
59 #include "utilities/macros.hpp"
60 #include "utilities/stringUtils.hpp"
61 #if INCLUDE_JVMCI
62 #include "jvmci/jvmciRuntime.hpp"
63 #endif
64 #if INCLUDE_JFR
65 #include "jfr/jfr.hpp"
66 #endif
67
68 // Note: This is a special bug reporting site for the JVM
69 #ifdef VENDOR_URL_VM_BUG
70 # define DEFAULT_VENDOR_URL_BUG VENDOR_URL_VM_BUG
71 #else
72 # define DEFAULT_VENDOR_URL_BUG "http://bugreport.java.com/bugreport/crash.jsp"
73 #endif
74 #define DEFAULT_JAVA_LAUNCHER "generic"
75
76 char* Arguments::_jvm_flags_file = NULL;
77 char** Arguments::_jvm_flags_array = NULL;
78 int Arguments::_num_jvm_flags = 0;
79 char** Arguments::_jvm_args_array = NULL;
80 int Arguments::_num_jvm_args = 0;
81 char* Arguments::_java_command = NULL;
82 SystemProperty* Arguments::_system_properties = NULL;
83 const char* Arguments::_gc_log_filename = NULL;
84 size_t Arguments::_conservative_max_heap_alignment = 0;
85 size_t Arguments::_min_heap_size = 0;
86 Arguments::Mode Arguments::_mode = _mixed;
87 bool Arguments::_java_compiler = false;
88 bool Arguments::_xdebug_mode = false;
89 const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG;
90 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER;
91 int Arguments::_sun_java_launcher_pid = -1;
92 bool Arguments::_sun_java_launcher_is_altjvm = false;
93
94 // These parameters are reset in method parse_vm_init_args()
95 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
96 bool Arguments::_UseOnStackReplacement = UseOnStackReplacement;
97 bool Arguments::_BackgroundCompilation = BackgroundCompilation;
98 bool Arguments::_ClipInlining = ClipInlining;
99 intx Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
100 intx Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
101
102 bool Arguments::_enable_preview = false;
103
104 char* Arguments::SharedArchivePath = NULL;
105
106 AgentLibraryList Arguments::_libraryList;
107 AgentLibraryList Arguments::_agentList;
108
109 abort_hook_t Arguments::_abort_hook = NULL;
110 exit_hook_t Arguments::_exit_hook = NULL;
111 vfprintf_hook_t Arguments::_vfprintf_hook = NULL;
112
113
114 SystemProperty *Arguments::_sun_boot_library_path = NULL;
115 SystemProperty *Arguments::_java_library_path = NULL;
116 SystemProperty *Arguments::_java_home = NULL;
117 SystemProperty *Arguments::_java_class_path = NULL;
118 SystemProperty *Arguments::_jdk_boot_class_path_append = NULL;
119 SystemProperty *Arguments::_vm_info = NULL;
120
121 GrowableArray<ModulePatchPath*> *Arguments::_patch_mod_prefix = NULL;
122 PathString *Arguments::_system_boot_class_path = NULL;
123 bool Arguments::_has_jimage = false;
124
125 char* Arguments::_ext_dirs = NULL;
126
127 bool PathString::set_value(const char *value) {
128 if (_value != NULL) {
129 FreeHeap(_value);
130 }
131 _value = AllocateHeap(strlen(value)+1, mtArguments);
132 assert(_value != NULL, "Unable to allocate space for new path value");
133 if (_value != NULL) {
134 strcpy(_value, value);
135 } else {
136 // not able to allocate
137 return false;
138 }
139 return true;
140 }
141
142 void PathString::append_value(const char *value) {
143 char *sp;
144 size_t len = 0;
145 if (value != NULL) {
146 len = strlen(value);
147 if (_value != NULL) {
148 len += strlen(_value);
149 }
150 sp = AllocateHeap(len+2, mtArguments);
151 assert(sp != NULL, "Unable to allocate space for new append path value");
152 if (sp != NULL) {
153 if (_value != NULL) {
154 strcpy(sp, _value);
155 strcat(sp, os::path_separator());
156 strcat(sp, value);
157 FreeHeap(_value);
158 } else {
159 strcpy(sp, value);
160 }
161 _value = sp;
162 }
163 }
164 }
165
166 PathString::PathString(const char* value) {
167 if (value == NULL) {
168 _value = NULL;
169 } else {
170 _value = AllocateHeap(strlen(value)+1, mtArguments);
171 strcpy(_value, value);
172 }
173 }
174
175 PathString::~PathString() {
176 if (_value != NULL) {
177 FreeHeap(_value);
178 _value = NULL;
179 }
180 }
181
182 ModulePatchPath::ModulePatchPath(const char* module_name, const char* path) {
183 assert(module_name != NULL && path != NULL, "Invalid module name or path value");
184 size_t len = strlen(module_name) + 1;
185 _module_name = AllocateHeap(len, mtInternal);
186 strncpy(_module_name, module_name, len); // copy the trailing null
187 _path = new PathString(path);
188 }
189
190 ModulePatchPath::~ModulePatchPath() {
191 if (_module_name != NULL) {
192 FreeHeap(_module_name);
193 _module_name = NULL;
194 }
195 if (_path != NULL) {
196 delete _path;
197 _path = NULL;
198 }
199 }
200
201 SystemProperty::SystemProperty(const char* key, const char* value, bool writeable, bool internal) : PathString(value) {
202 if (key == NULL) {
203 _key = NULL;
204 } else {
205 _key = AllocateHeap(strlen(key)+1, mtArguments);
206 strcpy(_key, key);
207 }
208 _next = NULL;
209 _internal = internal;
210 _writeable = writeable;
211 }
212
213 AgentLibrary::AgentLibrary(const char* name, const char* options,
214 bool is_absolute_path, void* os_lib,
215 bool instrument_lib) {
216 _name = AllocateHeap(strlen(name)+1, mtArguments);
217 strcpy(_name, name);
218 if (options == NULL) {
219 _options = NULL;
220 } else {
221 _options = AllocateHeap(strlen(options)+1, mtArguments);
222 strcpy(_options, options);
223 }
224 _is_absolute_path = is_absolute_path;
225 _os_lib = os_lib;
226 _next = NULL;
227 _state = agent_invalid;
228 _is_static_lib = false;
229 _is_instrument_lib = instrument_lib;
230 }
231
232 // Check if head of 'option' matches 'name', and sets 'tail' to the remaining
233 // part of the option string.
234 static bool match_option(const JavaVMOption *option, const char* name,
235 const char** tail) {
236 size_t len = strlen(name);
237 if (strncmp(option->optionString, name, len) == 0) {
238 *tail = option->optionString + len;
239 return true;
240 } else {
241 return false;
242 }
243 }
244
245 // Check if 'option' matches 'name'. No "tail" is allowed.
246 static bool match_option(const JavaVMOption *option, const char* name) {
247 const char* tail = NULL;
248 bool result = match_option(option, name, &tail);
249 if (tail != NULL && *tail == '\0') {
250 return result;
251 } else {
252 return false;
253 }
254 }
255
256 // Return true if any of the strings in null-terminated array 'names' matches.
257 // If tail_allowed is true, then the tail must begin with a colon; otherwise,
258 // the option must match exactly.
259 static bool match_option(const JavaVMOption* option, const char** names, const char** tail,
260 bool tail_allowed) {
261 for (/* empty */; *names != NULL; ++names) {
262 if (match_option(option, *names, tail)) {
263 if (**tail == '\0' || (tail_allowed && **tail == ':')) {
264 return true;
265 }
266 }
267 }
268 return false;
269 }
270
271 #if INCLUDE_JFR
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 return Jfr::on_start_flight_recording_option(option, tail);
278 } else if (match_option(*option, "-XX:FlightRecorderOptions", (const char**)&tail)) {
279 return Jfr::on_flight_recorder_option(option, tail);
280 }
281 return false;
282 }
283 #endif
284
285 static void logOption(const char* opt) {
286 if (PrintVMOptions) {
287 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt);
288 }
289 }
290
291 bool needs_module_property_warning = false;
292
293 #define MODULE_PROPERTY_PREFIX "jdk.module."
294 #define MODULE_PROPERTY_PREFIX_LEN 11
295 #define ADDEXPORTS "addexports"
296 #define ADDEXPORTS_LEN 10
297 #define ADDREADS "addreads"
298 #define ADDREADS_LEN 8
299 #define ADDOPENS "addopens"
300 #define ADDOPENS_LEN 8
301 #define PATCH "patch"
302 #define PATCH_LEN 5
303 #define ADDMODS "addmods"
304 #define ADDMODS_LEN 7
305 #define LIMITMODS "limitmods"
306 #define LIMITMODS_LEN 9
307 #define PATH "path"
308 #define PATH_LEN 4
309 #define UPGRADE_PATH "upgrade.path"
310 #define UPGRADE_PATH_LEN 12
311
312 void Arguments::add_init_library(const char* name, char* options) {
313 _libraryList.add(new AgentLibrary(name, options, false, NULL));
314 }
315
316 void Arguments::add_init_agent(const char* name, char* options, bool absolute_path) {
317 _agentList.add(new AgentLibrary(name, options, absolute_path, NULL));
318 }
319
320 void Arguments::add_instrument_agent(const char* name, char* options, bool absolute_path) {
321 _agentList.add(new AgentLibrary(name, options, absolute_path, NULL, true));
322 }
323
324 // Late-binding agents not started via arguments
325 void Arguments::add_loaded_agent(AgentLibrary *agentLib) {
326 _agentList.add(agentLib);
327 }
328
329 void Arguments::add_loaded_agent(const char* name, char* options, bool absolute_path, void* os_lib) {
330 _agentList.add(new AgentLibrary(name, options, absolute_path, os_lib));
331 }
332
333 // Return TRUE if option matches 'property', or 'property=', or 'property.'.
334 static bool matches_property_suffix(const char* option, const char* property, size_t len) {
335 return ((strncmp(option, property, len) == 0) &&
336 (option[len] == '=' || option[len] == '.' || option[len] == '\0'));
337 }
338
339 // Return true if property starts with "jdk.module." and its ensuing chars match
340 // any of the reserved module properties.
341 // property should be passed without the leading "-D".
342 bool Arguments::is_internal_module_property(const char* property) {
343 assert((strncmp(property, "-D", 2) != 0), "Unexpected leading -D");
344 if (strncmp(property, MODULE_PROPERTY_PREFIX, MODULE_PROPERTY_PREFIX_LEN) == 0) {
345 const char* property_suffix = property + MODULE_PROPERTY_PREFIX_LEN;
346 if (matches_property_suffix(property_suffix, ADDEXPORTS, ADDEXPORTS_LEN) ||
347 matches_property_suffix(property_suffix, ADDREADS, ADDREADS_LEN) ||
348 matches_property_suffix(property_suffix, ADDOPENS, ADDOPENS_LEN) ||
349 matches_property_suffix(property_suffix, PATCH, PATCH_LEN) ||
350 matches_property_suffix(property_suffix, ADDMODS, ADDMODS_LEN) ||
351 matches_property_suffix(property_suffix, LIMITMODS, LIMITMODS_LEN) ||
352 matches_property_suffix(property_suffix, PATH, PATH_LEN) ||
353 matches_property_suffix(property_suffix, UPGRADE_PATH, UPGRADE_PATH_LEN)) {
354 return true;
355 }
356 }
357 return false;
358 }
359
360 // Process java launcher properties.
361 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) {
362 // See if sun.java.launcher, sun.java.launcher.is_altjvm or
363 // sun.java.launcher.pid is defined.
364 // Must do this before setting up other system properties,
365 // as some of them may depend on launcher type.
366 for (int index = 0; index < args->nOptions; index++) {
367 const JavaVMOption* option = args->options + index;
368 const char* tail;
369
370 if (match_option(option, "-Dsun.java.launcher=", &tail)) {
371 process_java_launcher_argument(tail, option->extraInfo);
372 continue;
373 }
374 if (match_option(option, "-Dsun.java.launcher.is_altjvm=", &tail)) {
375 if (strcmp(tail, "true") == 0) {
376 _sun_java_launcher_is_altjvm = true;
377 }
378 continue;
379 }
380 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) {
381 _sun_java_launcher_pid = atoi(tail);
382 continue;
383 }
384 }
385 }
386
387 // Initialize system properties key and value.
388 void Arguments::init_system_properties() {
389
390 // Set up _system_boot_class_path which is not a property but
391 // relies heavily on argument processing and the jdk.boot.class.path.append
392 // property. It is used to store the underlying system boot class path.
393 _system_boot_class_path = new PathString(NULL);
394
395 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name",
396 "Java Virtual Machine Specification", false));
397 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false));
398 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false));
399 PropertyList_add(&_system_properties, new SystemProperty("jdk.debug", VM_Version::jdk_debug_level(), false));
400
401 // Initialize the vm.info now, but it will need updating after argument parsing.
402 _vm_info = new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true);
403
404 // Following are JVMTI agent writable properties.
405 // Properties values are set to NULL and they are
406 // os specific they are initialized in os::init_system_properties_values().
407 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true);
408 _java_library_path = new SystemProperty("java.library.path", NULL, true);
409 _java_home = new SystemProperty("java.home", NULL, true);
410 _java_class_path = new SystemProperty("java.class.path", "", true);
411 // jdk.boot.class.path.append is a non-writeable, internal property.
412 // It can only be set by either:
413 // - -Xbootclasspath/a:
414 // - AddToBootstrapClassLoaderSearch during JVMTI OnLoad phase
415 _jdk_boot_class_path_append = new SystemProperty("jdk.boot.class.path.append", "", false, true);
416
417 // Add to System Property list.
418 PropertyList_add(&_system_properties, _sun_boot_library_path);
419 PropertyList_add(&_system_properties, _java_library_path);
420 PropertyList_add(&_system_properties, _java_home);
421 PropertyList_add(&_system_properties, _java_class_path);
422 PropertyList_add(&_system_properties, _jdk_boot_class_path_append);
423 PropertyList_add(&_system_properties, _vm_info);
424
425 // Set OS specific system properties values
426 os::init_system_properties_values();
427 }
428
429 // Update/Initialize System properties after JDK version number is known
430 void Arguments::init_version_specific_system_properties() {
431 enum { bufsz = 16 };
432 char buffer[bufsz];
433 const char* spec_vendor = "Oracle Corporation";
434 uint32_t spec_version = JDK_Version::current().major_version();
435
436 jio_snprintf(buffer, bufsz, UINT32_FORMAT, spec_version);
437
438 PropertyList_add(&_system_properties,
439 new SystemProperty("java.vm.specification.vendor", spec_vendor, false));
440 PropertyList_add(&_system_properties,
441 new SystemProperty("java.vm.specification.version", buffer, false));
442 PropertyList_add(&_system_properties,
443 new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false));
444 }
445
446 /*
447 * -XX argument processing:
448 *
449 * -XX arguments are defined in several places, such as:
450 * globals.hpp, globals_<cpu>.hpp, globals_<os>.hpp, <compiler>_globals.hpp, or <gc>_globals.hpp.
451 * -XX arguments are parsed in parse_argument().
452 * -XX argument bounds checking is done in check_vm_args_consistency().
453 *
454 * Over time -XX arguments may change. There are mechanisms to handle common cases:
455 *
456 * ALIASED: An option that is simply another name for another option. This is often
457 * part of the process of deprecating a flag, but not all aliases need
458 * to be deprecated.
459 *
460 * Create an alias for an option by adding the old and new option names to the
461 * "aliased_jvm_flags" table. Delete the old variable from globals.hpp (etc).
462 *
463 * DEPRECATED: An option that is supported, but a warning is printed to let the user know that
464 * support may be removed in the future. Both regular and aliased options may be
465 * deprecated.
466 *
467 * Add a deprecation warning for an option (or alias) by adding an entry in the
468 * "special_jvm_flags" table and setting the "deprecated_in" field.
469 * Often an option "deprecated" in one major release will
470 * be made "obsolete" in the next. In this case the entry should also have its
471 * "obsolete_in" field set.
472 *
473 * OBSOLETE: An option that has been removed (and deleted from globals.hpp), but is still accepted
474 * on the command line. A warning is printed to let the user know that option might not
475 * be accepted in the future.
476 *
477 * Add an obsolete warning for an option by adding an entry in the "special_jvm_flags"
478 * table and setting the "obsolete_in" field.
479 *
480 * EXPIRED: A deprecated or obsolete option that has an "accept_until" version less than or equal
481 * to the current JDK version. The system will flatly refuse to admit the existence of
482 * the flag. This allows a flag to die automatically over JDK releases.
483 *
484 * Note that manual cleanup of expired options should be done at major JDK version upgrades:
485 * - Newly expired options should be removed from the special_jvm_flags and aliased_jvm_flags tables.
486 * - Newly obsolete or expired deprecated options should have their global variable
487 * definitions removed (from globals.hpp, etc) and related implementations removed.
488 *
489 * Recommended approach for removing options:
490 *
491 * To remove options commonly used by customers (e.g. product -XX options), use
492 * the 3-step model adding major release numbers to the deprecate, obsolete and expire columns.
493 *
494 * To remove internal options (e.g. diagnostic, experimental, develop options), use
495 * a 2-step model adding major release numbers to the obsolete and expire columns.
496 *
497 * To change the name of an option, use the alias table as well as a 2-step
498 * model adding major release numbers to the deprecate and expire columns.
499 * Think twice about aliasing commonly used customer options.
500 *
501 * There are times when it is appropriate to leave a future release number as undefined.
502 *
503 * Tests: Aliases should be tested in VMAliasOptions.java.
504 * Deprecated options should be tested in VMDeprecatedOptions.java.
505 */
506
507 // The special_jvm_flags table declares options that are being deprecated and/or obsoleted. The
508 // "deprecated_in" or "obsolete_in" fields may be set to "undefined", but not both.
509 // When the JDK version reaches 'deprecated_in' limit, the JVM will process this flag on
510 // the command-line as usual, but will issue a warning.
511 // When the JDK version reaches 'obsolete_in' limit, the JVM will continue accepting this flag on
512 // the command-line, while issuing a warning and ignoring the flag value.
513 // Once the JDK version reaches 'expired_in' limit, the JVM will flatly refuse to admit the
514 // existence of the flag.
515 //
516 // MANUAL CLEANUP ON JDK VERSION UPDATES:
517 // This table ensures that the handling of options will update automatically when the JDK
518 // version is incremented, but the source code needs to be cleanup up manually:
519 // - As "deprecated" options age into "obsolete" or "expired" options, the associated "globals"
520 // variable should be removed, as well as users of the variable.
521 // - As "deprecated" options age into "obsolete" options, move the entry into the
522 // "Obsolete Flags" section of the table.
523 // - All expired options should be removed from the table.
524 static SpecialFlag const special_jvm_flags[] = {
525 // -------------- Deprecated Flags --------------
526 // --- Non-alias flags - sorted by obsolete_in then expired_in:
527 { "MaxGCMinorPauseMillis", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() },
528 { "UseConcMarkSweepGC", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
529 { "AssumeMP", JDK_Version::jdk(10),JDK_Version::undefined(), JDK_Version::undefined() },
530 { "MonitorInUseLists", JDK_Version::jdk(10),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::undefined(), JDK_Version::undefined() },
535 { "IgnoreUnverifiableClassesDuringDump", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
536 { "CompilerThreadHintNoPreempt", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
537 { "VMThreadHintNoPreempt", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
538 { "AggressiveOpts", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
539
540 // --- Deprecated alias flags (see also aliased_jvm_flags) - sorted by obsolete_in then expired_in:
541 { "DefaultMaxRAMFraction", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() },
542 { "CreateMinidumpOnCrash", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
543 { "MustCallLoadClassInternal", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
544 { "UnsyncloadClass", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
545
546 // -------------- Obsolete Flags - sorted by expired_in --------------
547 { "CheckAssertionStatusDirectives",JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
548 { "PrintMallocFree", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
549 { "PrintMalloc", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
550 { "ShowSafepointMsgs", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
551 { "FastTLABRefill", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
552 { "SafepointSpinBeforeYield", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
553 { "CheckEndorsedAndExtDirs", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
554 { "DeferThrSuspendLoopCount", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
555 { "DeferPollingPageLoopCount", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
556 { "TraceScavenge", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
557 { "PermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::undefined() },
558 { "MaxPermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::undefined() },
559 { "SharedReadWriteSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() },
560 { "SharedReadOnlySize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() },
561 { "SharedMiscDataSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() },
562 { "SharedMiscCodeSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() },
563 { "UseUTCFileTimestamp", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
564 { "InlineNotify", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
565 { "EnableTracing", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
566 { "UseLockedTracing", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
567 { "NativeMonitorTimeout", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
568 { "NativeMonitorSpinLimit", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
569 { "NativeMonitorFlags", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
570 { "UnlinkSymbolsALot", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
571 { "AllowNonVirtualCalls", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
572 { "PrintSafepointStatistics", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
573 { "PrintSafepointStatisticsTimeout",JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
574 { "PrintSafepointStatisticsCount", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
575 { "TransmitErrorReport", JDK_Version::undefined(), JDK_Version::jdk(12), JDK_Version::jdk(13) },
576 { "ErrorReportServer", JDK_Version::undefined(), JDK_Version::jdk(12), JDK_Version::jdk(13) },
577
578 #ifdef TEST_VERIFY_SPECIAL_JVM_FLAGS
579 { "dep > obs", JDK_Version::jdk(9), JDK_Version::jdk(8), JDK_Version::undefined() },
580 { "dep > exp ", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(8) },
581 { "obs > exp ", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(8) },
582 { "not deprecated or obsolete", JDK_Version::undefined(), JDK_Version::undefined(), JDK_Version::jdk(9) },
583 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
584 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
585 { "BytecodeVerificationRemote", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::undefined() },
586 #endif
587
588 { NULL, JDK_Version(0), JDK_Version(0) }
589 };
590
591 // Flags that are aliases for other flags.
592 typedef struct {
593 const char* alias_name;
594 const char* real_name;
595 } AliasedFlag;
596
597 static AliasedFlag const aliased_jvm_flags[] = {
598 { "DefaultMaxRAMFraction", "MaxRAMFraction" },
599 { "CreateMinidumpOnCrash", "CreateCoredumpOnCrash" },
600 { NULL, NULL}
601 };
602
603 // NOTE: A compatibility request will be necessary for each alias to be removed.
604 static AliasedLoggingFlag const aliased_logging_flags[] = {
605 { "PrintCompressedOopsMode", LogLevel::Info, true, LOG_TAGS(gc, heap, coops) },
606 { "PrintSharedSpaces", LogLevel::Info, true, LOG_TAGS(cds) },
607 { "TraceBiasedLocking", LogLevel::Info, true, LOG_TAGS(biasedlocking) },
608 { "TraceClassLoading", LogLevel::Info, true, LOG_TAGS(class, load) },
609 { "TraceClassLoadingPreorder", LogLevel::Debug, true, LOG_TAGS(class, preorder) },
610 { "TraceClassPaths", LogLevel::Info, true, LOG_TAGS(class, path) },
611 { "TraceClassResolution", LogLevel::Debug, true, LOG_TAGS(class, resolve) },
612 { "TraceClassUnloading", LogLevel::Info, true, LOG_TAGS(class, unload) },
613 { "TraceExceptions", LogLevel::Info, true, LOG_TAGS(exceptions) },
614 { "TraceLoaderConstraints", LogLevel::Info, true, LOG_TAGS(class, loader, constraints) },
615 { "TraceMonitorInflation", LogLevel::Debug, true, LOG_TAGS(monitorinflation) },
616 { "TraceSafepointCleanupTime", LogLevel::Info, true, LOG_TAGS(safepoint, cleanup) },
617 { "TraceJVMTIObjectTagging", LogLevel::Debug, true, LOG_TAGS(jvmti, objecttagging) },
618 { "TraceRedefineClasses", LogLevel::Info, false, LOG_TAGS(redefine, class) },
619 { NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG) }
620 };
621
622 #ifndef PRODUCT
623 // These options are removed in jdk9. Remove this code for jdk10.
624 static AliasedFlag const removed_develop_logging_flags[] = {
625 { "TraceClassInitialization", "-Xlog:class+init" },
626 { "TraceClassLoaderData", "-Xlog:class+loader+data" },
627 { "TraceDefaultMethods", "-Xlog:defaultmethods=debug" },
628 { "TraceItables", "-Xlog:itables=debug" },
629 { "TraceMonitorMismatch", "-Xlog:monitormismatch=info" },
630 { "TraceSafepoint", "-Xlog:safepoint=debug" },
631 { "TraceStartupTime", "-Xlog:startuptime" },
632 { "TraceVMOperation", "-Xlog:vmoperation=debug" },
633 { "PrintVtables", "-Xlog:vtables=debug" },
634 { "VerboseVerification", "-Xlog:verification" },
635 { NULL, NULL }
636 };
637 #endif //PRODUCT
638
639 // Return true if "v" is less than "other", where "other" may be "undefined".
640 static bool version_less_than(JDK_Version v, JDK_Version other) {
641 assert(!v.is_undefined(), "must be defined");
642 if (!other.is_undefined() && v.compare(other) >= 0) {
643 return false;
644 } else {
645 return true;
646 }
647 }
648
649 extern bool lookup_special_flag_ext(const char *flag_name, SpecialFlag& flag);
650
651 static bool lookup_special_flag(const char *flag_name, SpecialFlag& flag) {
652 // Allow extensions to have priority
653 if (lookup_special_flag_ext(flag_name, flag)) {
654 return true;
655 }
656
657 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
658 if ((strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
659 flag = special_jvm_flags[i];
660 return true;
661 }
662 }
663 return false;
664 }
665
666 bool Arguments::is_obsolete_flag(const char *flag_name, JDK_Version* version) {
667 assert(version != NULL, "Must provide a version buffer");
668 SpecialFlag flag;
669 if (lookup_special_flag(flag_name, flag)) {
670 if (!flag.obsolete_in.is_undefined()) {
671 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) {
672 *version = flag.obsolete_in;
673 return true;
674 }
675 }
676 }
677 return false;
678 }
679
680 int Arguments::is_deprecated_flag(const char *flag_name, JDK_Version* version) {
681 assert(version != NULL, "Must provide a version buffer");
682 SpecialFlag flag;
683 if (lookup_special_flag(flag_name, flag)) {
684 if (!flag.deprecated_in.is_undefined()) {
685 if (version_less_than(JDK_Version::current(), flag.obsolete_in) &&
686 version_less_than(JDK_Version::current(), flag.expired_in)) {
687 *version = flag.deprecated_in;
688 return 1;
689 } else {
690 return -1;
691 }
692 }
693 }
694 return 0;
695 }
696
697 #ifndef PRODUCT
698 const char* Arguments::removed_develop_logging_flag_name(const char* name){
699 for (size_t i = 0; removed_develop_logging_flags[i].alias_name != NULL; i++) {
700 const AliasedFlag& flag = removed_develop_logging_flags[i];
701 if (strcmp(flag.alias_name, name) == 0) {
702 return flag.real_name;
703 }
704 }
705 return NULL;
706 }
707 #endif // PRODUCT
708
709 const char* Arguments::real_flag_name(const char *flag_name) {
710 for (size_t i = 0; aliased_jvm_flags[i].alias_name != NULL; i++) {
711 const AliasedFlag& flag_status = aliased_jvm_flags[i];
712 if (strcmp(flag_status.alias_name, flag_name) == 0) {
713 return flag_status.real_name;
714 }
715 }
716 return flag_name;
717 }
718
719 #ifdef ASSERT
720 static bool lookup_special_flag(const char *flag_name, size_t skip_index) {
721 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
722 if ((i != skip_index) && (strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
723 return true;
724 }
725 }
726 return false;
727 }
728
729 // Verifies the correctness of the entries in the special_jvm_flags table.
730 // If there is a semantic error (i.e. a bug in the table) such as the obsoletion
731 // version being earlier than the deprecation version, then a warning is issued
732 // and verification fails - by returning false. If it is detected that the table
733 // is out of date, with respect to the current version, then a warning is issued
734 // but verification does not fail. This allows the VM to operate when the version
735 // is first updated, without needing to update all the impacted flags at the
736 // same time.
737 static bool verify_special_jvm_flags() {
738 bool success = true;
739 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
740 const SpecialFlag& flag = special_jvm_flags[i];
741 if (lookup_special_flag(flag.name, i)) {
742 warning("Duplicate special flag declaration \"%s\"", flag.name);
743 success = false;
744 }
745 if (flag.deprecated_in.is_undefined() &&
746 flag.obsolete_in.is_undefined()) {
747 warning("Special flag entry \"%s\" must declare version deprecated and/or obsoleted in.", flag.name);
748 success = false;
749 }
750
751 if (!flag.deprecated_in.is_undefined()) {
752 if (!version_less_than(flag.deprecated_in, flag.obsolete_in)) {
753 warning("Special flag entry \"%s\" must be deprecated before obsoleted.", flag.name);
754 success = false;
755 }
756
757 if (!version_less_than(flag.deprecated_in, flag.expired_in)) {
758 warning("Special flag entry \"%s\" must be deprecated before expired.", flag.name);
759 success = false;
760 }
761 }
762
763 if (!flag.obsolete_in.is_undefined()) {
764 if (!version_less_than(flag.obsolete_in, flag.expired_in)) {
765 warning("Special flag entry \"%s\" must be obsoleted before expired.", flag.name);
766 success = false;
767 }
768
769 // if flag has become obsolete it should not have a "globals" flag defined anymore.
770 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) {
771 if (JVMFlag::find_flag(flag.name) != NULL) {
772 // Temporarily disable the warning: 8196739
773 // warning("Global variable for obsolete special flag entry \"%s\" should be removed", flag.name);
774 }
775 }
776 }
777
778 if (!flag.expired_in.is_undefined()) {
779 // if flag has become expired it should not have a "globals" flag defined anymore.
780 if (!version_less_than(JDK_Version::current(), flag.expired_in)) {
781 if (JVMFlag::find_flag(flag.name) != NULL) {
782 // Temporarily disable the warning: 8196739
783 // warning("Global variable for expired flag entry \"%s\" should be removed", flag.name);
784 }
785 }
786 }
787
788 }
789 return success;
790 }
791 #endif
792
793 // Parses a size specification string.
794 bool Arguments::atojulong(const char *s, julong* result) {
795 julong n = 0;
796
797 // First char must be a digit. Don't allow negative numbers or leading spaces.
798 if (!isdigit(*s)) {
799 return false;
800 }
801
802 bool is_hex = (s[0] == '0' && (s[1] == 'x' || s[1] == 'X'));
803 char* remainder;
804 errno = 0;
805 n = strtoull(s, &remainder, (is_hex ? 16 : 10));
806 if (errno != 0) {
807 return false;
808 }
809
810 // Fail if no number was read at all or if the remainder contains more than a single non-digit character.
811 if (remainder == s || strlen(remainder) > 1) {
812 return false;
813 }
814
815 switch (*remainder) {
816 case 'T': case 't':
817 *result = n * G * K;
818 // Check for overflow.
819 if (*result/((julong)G * K) != n) return false;
820 return true;
821 case 'G': case 'g':
822 *result = n * G;
823 if (*result/G != n) return false;
824 return true;
825 case 'M': case 'm':
826 *result = n * M;
827 if (*result/M != n) return false;
828 return true;
829 case 'K': case 'k':
830 *result = n * K;
831 if (*result/K != n) return false;
832 return true;
833 case '\0':
834 *result = n;
835 return true;
836 default:
837 return false;
838 }
839 }
840
841 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size, julong max_size) {
842 if (size < min_size) return arg_too_small;
843 if (size > max_size) return arg_too_big;
844 return arg_in_range;
845 }
846
847 // Describe an argument out of range error
848 void Arguments::describe_range_error(ArgsRange errcode) {
849 switch(errcode) {
850 case arg_too_big:
851 jio_fprintf(defaultStream::error_stream(),
852 "The specified size exceeds the maximum "
853 "representable size.\n");
854 break;
855 case arg_too_small:
856 case arg_unreadable:
857 case arg_in_range:
858 // do nothing for now
859 break;
860 default:
861 ShouldNotReachHere();
862 }
863 }
864
865 static bool set_bool_flag(const char* name, bool value, JVMFlag::Flags origin) {
866 if (JVMFlag::boolAtPut(name, &value, origin) == JVMFlag::SUCCESS) {
867 return true;
868 } else {
869 return false;
870 }
871 }
872
873 static bool set_fp_numeric_flag(const char* name, char* value, JVMFlag::Flags origin) {
874 char* end;
875 errno = 0;
876 double v = strtod(value, &end);
877 if ((errno != 0) || (*end != 0)) {
878 return false;
879 }
880
881 if (JVMFlag::doubleAtPut(name, &v, origin) == JVMFlag::SUCCESS) {
882 return true;
883 }
884 return false;
885 }
886
887 static bool set_numeric_flag(const char* name, char* value, JVMFlag::Flags origin) {
888 julong v;
889 int int_v;
890 intx intx_v;
891 bool is_neg = false;
892 JVMFlag* result = JVMFlag::find_flag(name, strlen(name));
893
894 if (result == NULL) {
895 return false;
896 }
897
898 // Check the sign first since atojulong() parses only unsigned values.
899 if (*value == '-') {
900 if (!result->is_intx() && !result->is_int()) {
901 return false;
902 }
903 value++;
904 is_neg = true;
905 }
906 if (!Arguments::atojulong(value, &v)) {
907 return false;
908 }
909 if (result->is_int()) {
910 int_v = (int) v;
911 if (is_neg) {
912 int_v = -int_v;
913 }
914 return JVMFlag::intAtPut(result, &int_v, origin) == JVMFlag::SUCCESS;
915 } else if (result->is_uint()) {
916 uint uint_v = (uint) v;
917 return JVMFlag::uintAtPut(result, &uint_v, origin) == JVMFlag::SUCCESS;
918 } else if (result->is_intx()) {
919 intx_v = (intx) v;
920 if (is_neg) {
921 intx_v = -intx_v;
922 }
923 return JVMFlag::intxAtPut(result, &intx_v, origin) == JVMFlag::SUCCESS;
924 } else if (result->is_uintx()) {
925 uintx uintx_v = (uintx) v;
926 return JVMFlag::uintxAtPut(result, &uintx_v, origin) == JVMFlag::SUCCESS;
927 } else if (result->is_uint64_t()) {
928 uint64_t uint64_t_v = (uint64_t) v;
929 return JVMFlag::uint64_tAtPut(result, &uint64_t_v, origin) == JVMFlag::SUCCESS;
930 } else if (result->is_size_t()) {
931 size_t size_t_v = (size_t) v;
932 return JVMFlag::size_tAtPut(result, &size_t_v, origin) == JVMFlag::SUCCESS;
933 } else if (result->is_double()) {
934 double double_v = (double) v;
935 return JVMFlag::doubleAtPut(result, &double_v, origin) == JVMFlag::SUCCESS;
936 } else {
937 return false;
938 }
939 }
940
941 static bool set_string_flag(const char* name, const char* value, JVMFlag::Flags origin) {
942 if (JVMFlag::ccstrAtPut(name, &value, origin) != JVMFlag::SUCCESS) return false;
943 // Contract: JVMFlag always returns a pointer that needs freeing.
944 FREE_C_HEAP_ARRAY(char, value);
945 return true;
946 }
947
948 static bool append_to_string_flag(const char* name, const char* new_value, JVMFlag::Flags origin) {
949 const char* old_value = "";
950 if (JVMFlag::ccstrAt(name, &old_value) != JVMFlag::SUCCESS) return false;
951 size_t old_len = old_value != NULL ? strlen(old_value) : 0;
952 size_t new_len = strlen(new_value);
953 const char* value;
954 char* free_this_too = NULL;
955 if (old_len == 0) {
956 value = new_value;
957 } else if (new_len == 0) {
958 value = old_value;
959 } else {
960 size_t length = old_len + 1 + new_len + 1;
961 char* buf = NEW_C_HEAP_ARRAY(char, length, mtArguments);
962 // each new setting adds another LINE to the switch:
963 jio_snprintf(buf, length, "%s\n%s", old_value, new_value);
964 value = buf;
965 free_this_too = buf;
966 }
967 (void) JVMFlag::ccstrAtPut(name, &value, origin);
968 // JVMFlag always returns a pointer that needs freeing.
969 FREE_C_HEAP_ARRAY(char, value);
970 if (free_this_too != NULL) {
971 // JVMFlag made its own copy, so I must delete my own temp. buffer.
972 FREE_C_HEAP_ARRAY(char, free_this_too);
973 }
974 return true;
975 }
976
977 const char* Arguments::handle_aliases_and_deprecation(const char* arg, bool warn) {
978 const char* real_name = real_flag_name(arg);
979 JDK_Version since = JDK_Version();
980 switch (is_deprecated_flag(arg, &since)) {
981 case -1:
982 return NULL; // obsolete or expired, don't process normally
983 case 0:
984 return real_name;
985 case 1: {
986 if (warn) {
987 char version[256];
988 since.to_string(version, sizeof(version));
989 if (real_name != arg) {
990 warning("Option %s was deprecated in version %s and will likely be removed in a future release. Use option %s instead.",
991 arg, version, real_name);
992 } else {
993 warning("Option %s was deprecated in version %s and will likely be removed in a future release.",
994 arg, version);
995 }
996 }
997 return real_name;
998 }
999 }
1000 ShouldNotReachHere();
1001 return NULL;
1002 }
1003
1004 void log_deprecated_flag(const char* name, bool on, AliasedLoggingFlag alf) {
1005 LogTagType tagSet[] = {alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5};
1006 // Set tagset string buffer at max size of 256, large enough for any alias tagset
1007 const int max_tagset_size = 256;
1008 int max_tagset_len = max_tagset_size - 1;
1009 char tagset_buffer[max_tagset_size];
1010 tagset_buffer[0] = '\0';
1011
1012 // Write tag-set for aliased logging option, in string list form
1013 int max_tags = sizeof(tagSet)/sizeof(tagSet[0]);
1014 for (int i = 0; i < max_tags && tagSet[i] != LogTag::__NO_TAG; i++) {
1015 if (i > 0) {
1016 strncat(tagset_buffer, "+", max_tagset_len - strlen(tagset_buffer));
1017 }
1018 strncat(tagset_buffer, LogTag::name(tagSet[i]), max_tagset_len - strlen(tagset_buffer));
1019 }
1020 if (!alf.exactMatch) {
1021 strncat(tagset_buffer, "*", max_tagset_len - strlen(tagset_buffer));
1022 }
1023 log_warning(arguments)("-XX:%s%s is deprecated. Will use -Xlog:%s=%s instead.",
1024 (on) ? "+" : "-",
1025 name,
1026 tagset_buffer,
1027 (on) ? LogLevel::name(alf.level) : "off");
1028 }
1029
1030 AliasedLoggingFlag Arguments::catch_logging_aliases(const char* name, bool on){
1031 for (size_t i = 0; aliased_logging_flags[i].alias_name != NULL; i++) {
1032 const AliasedLoggingFlag& alf = aliased_logging_flags[i];
1033 if (strcmp(alf.alias_name, name) == 0) {
1034 log_deprecated_flag(name, on, alf);
1035 return alf;
1036 }
1037 }
1038 AliasedLoggingFlag a = {NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG)};
1039 return a;
1040 }
1041
1042 bool Arguments::parse_argument(const char* arg, JVMFlag::Flags origin) {
1043
1044 // range of acceptable characters spelled out for portability reasons
1045 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]"
1046 #define BUFLEN 255
1047 char name[BUFLEN+1];
1048 char dummy;
1049 const char* real_name;
1050 bool warn_if_deprecated = true;
1051
1052 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
1053 AliasedLoggingFlag alf = catch_logging_aliases(name, false);
1054 if (alf.alias_name != NULL){
1055 LogConfiguration::configure_stdout(LogLevel::Off, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
1056 return true;
1057 }
1058 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1059 if (real_name == NULL) {
1060 return false;
1061 }
1062 return set_bool_flag(real_name, false, origin);
1063 }
1064 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
1065 AliasedLoggingFlag alf = catch_logging_aliases(name, true);
1066 if (alf.alias_name != NULL){
1067 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
1068 return true;
1069 }
1070 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1071 if (real_name == NULL) {
1072 return false;
1073 }
1074 return set_bool_flag(real_name, true, origin);
1075 }
1076
1077 char punct;
1078 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') {
1079 const char* value = strchr(arg, '=') + 1;
1080 JVMFlag* flag;
1081
1082 // this scanf pattern matches both strings (handled here) and numbers (handled later))
1083 AliasedLoggingFlag alf = catch_logging_aliases(name, true);
1084 if (alf.alias_name != NULL) {
1085 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
1086 return true;
1087 }
1088 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1089 if (real_name == NULL) {
1090 return false;
1091 }
1092 flag = JVMFlag::find_flag(real_name);
1093 if (flag != NULL && flag->is_ccstr()) {
1094 if (flag->ccstr_accumulates()) {
1095 return append_to_string_flag(real_name, value, origin);
1096 } else {
1097 if (value[0] == '\0') {
1098 value = NULL;
1099 }
1100 return set_string_flag(real_name, value, origin);
1101 }
1102 } else {
1103 warn_if_deprecated = false; // if arg is deprecated, we've already done warning...
1104 }
1105 }
1106
1107 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') {
1108 const char* value = strchr(arg, '=') + 1;
1109 // -XX:Foo:=xxx will reset the string flag to the given value.
1110 if (value[0] == '\0') {
1111 value = NULL;
1112 }
1113 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1114 if (real_name == NULL) {
1115 return false;
1116 }
1117 return set_string_flag(real_name, value, origin);
1118 }
1119
1120 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.eE+]"
1121 #define SIGNED_NUMBER_RANGE "[-0123456789]"
1122 #define NUMBER_RANGE "[0123456789eE+-]"
1123 char value[BUFLEN + 1];
1124 char value2[BUFLEN + 1];
1125 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) {
1126 // Looks like a floating-point number -- try again with more lenient format string
1127 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) {
1128 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1129 if (real_name == NULL) {
1130 return false;
1131 }
1132 return set_fp_numeric_flag(real_name, value, origin);
1133 }
1134 }
1135
1136 #define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]"
1137 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) {
1138 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1139 if (real_name == NULL) {
1140 return false;
1141 }
1142 return set_numeric_flag(real_name, value, origin);
1143 }
1144
1145 return false;
1146 }
1147
1148 void Arguments::add_string(char*** bldarray, int* count, const char* arg) {
1149 assert(bldarray != NULL, "illegal argument");
1150
1151 if (arg == NULL) {
1152 return;
1153 }
1154
1155 int new_count = *count + 1;
1156
1157 // expand the array and add arg to the last element
1158 if (*bldarray == NULL) {
1159 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtArguments);
1160 } else {
1161 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtArguments);
1162 }
1163 (*bldarray)[*count] = os::strdup_check_oom(arg);
1164 *count = new_count;
1165 }
1166
1167 void Arguments::build_jvm_args(const char* arg) {
1168 add_string(&_jvm_args_array, &_num_jvm_args, arg);
1169 }
1170
1171 void Arguments::build_jvm_flags(const char* arg) {
1172 add_string(&_jvm_flags_array, &_num_jvm_flags, arg);
1173 }
1174
1175 // utility function to return a string that concatenates all
1176 // strings in a given char** array
1177 const char* Arguments::build_resource_string(char** args, int count) {
1178 if (args == NULL || count == 0) {
1179 return NULL;
1180 }
1181 size_t length = 0;
1182 for (int i = 0; i < count; i++) {
1183 length += strlen(args[i]) + 1; // add 1 for a space or NULL terminating character
1184 }
1185 char* s = NEW_RESOURCE_ARRAY(char, length);
1186 char* dst = s;
1187 for (int j = 0; j < count; j++) {
1188 size_t offset = strlen(args[j]) + 1; // add 1 for a space or NULL terminating character
1189 jio_snprintf(dst, length, "%s ", args[j]); // jio_snprintf will replace the last space character with NULL character
1190 dst += offset;
1191 length -= offset;
1192 }
1193 return (const char*) s;
1194 }
1195
1196 void Arguments::print_on(outputStream* st) {
1197 st->print_cr("VM Arguments:");
1198 if (num_jvm_flags() > 0) {
1199 st->print("jvm_flags: "); print_jvm_flags_on(st);
1200 st->cr();
1201 }
1202 if (num_jvm_args() > 0) {
1203 st->print("jvm_args: "); print_jvm_args_on(st);
1204 st->cr();
1205 }
1206 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>");
1207 if (_java_class_path != NULL) {
1208 char* path = _java_class_path->value();
1209 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path );
1210 }
1211 st->print_cr("Launcher Type: %s", _sun_java_launcher);
1212 }
1213
1214 void Arguments::print_summary_on(outputStream* st) {
1215 // Print the command line. Environment variables that are helpful for
1216 // reproducing the problem are written later in the hs_err file.
1217 // flags are from setting file
1218 if (num_jvm_flags() > 0) {
1219 st->print_raw("Settings File: ");
1220 print_jvm_flags_on(st);
1221 st->cr();
1222 }
1223 // args are the command line and environment variable arguments.
1224 st->print_raw("Command Line: ");
1225 if (num_jvm_args() > 0) {
1226 print_jvm_args_on(st);
1227 }
1228 // this is the classfile and any arguments to the java program
1229 if (java_command() != NULL) {
1230 st->print("%s", java_command());
1231 }
1232 st->cr();
1233 }
1234
1235 void Arguments::print_jvm_flags_on(outputStream* st) {
1236 if (_num_jvm_flags > 0) {
1237 for (int i=0; i < _num_jvm_flags; i++) {
1238 st->print("%s ", _jvm_flags_array[i]);
1239 }
1240 }
1241 }
1242
1243 void Arguments::print_jvm_args_on(outputStream* st) {
1244 if (_num_jvm_args > 0) {
1245 for (int i=0; i < _num_jvm_args; i++) {
1246 st->print("%s ", _jvm_args_array[i]);
1247 }
1248 }
1249 }
1250
1251 bool Arguments::process_argument(const char* arg,
1252 jboolean ignore_unrecognized,
1253 JVMFlag::Flags origin) {
1254 JDK_Version since = JDK_Version();
1255
1256 if (parse_argument(arg, origin)) {
1257 return true;
1258 }
1259
1260 // Determine if the flag has '+', '-', or '=' characters.
1261 bool has_plus_minus = (*arg == '+' || *arg == '-');
1262 const char* const argname = has_plus_minus ? arg + 1 : arg;
1263
1264 size_t arg_len;
1265 const char* equal_sign = strchr(argname, '=');
1266 if (equal_sign == NULL) {
1267 arg_len = strlen(argname);
1268 } else {
1269 arg_len = equal_sign - argname;
1270 }
1271
1272 // Only make the obsolete check for valid arguments.
1273 if (arg_len <= BUFLEN) {
1274 // Construct a string which consists only of the argument name without '+', '-', or '='.
1275 char stripped_argname[BUFLEN+1]; // +1 for '\0'
1276 jio_snprintf(stripped_argname, arg_len+1, "%s", argname); // +1 for '\0'
1277 if (is_obsolete_flag(stripped_argname, &since)) {
1278 char version[256];
1279 since.to_string(version, sizeof(version));
1280 warning("Ignoring option %s; support was removed in %s", stripped_argname, version);
1281 return true;
1282 }
1283 #ifndef PRODUCT
1284 else {
1285 const char* replacement;
1286 if ((replacement = removed_develop_logging_flag_name(stripped_argname)) != NULL){
1287 log_warning(arguments)("%s has been removed. Please use %s instead.",
1288 stripped_argname,
1289 replacement);
1290 return false;
1291 }
1292 }
1293 #endif //PRODUCT
1294 }
1295
1296 // For locked flags, report a custom error message if available.
1297 // Otherwise, report the standard unrecognized VM option.
1298 JVMFlag* found_flag = JVMFlag::find_flag((const char*)argname, arg_len, true, true);
1299 if (found_flag != NULL) {
1300 char locked_message_buf[BUFLEN];
1301 JVMFlag::MsgType msg_type = found_flag->get_locked_message(locked_message_buf, BUFLEN);
1302 if (strlen(locked_message_buf) == 0) {
1303 if (found_flag->is_bool() && !has_plus_minus) {
1304 jio_fprintf(defaultStream::error_stream(),
1305 "Missing +/- setting for VM option '%s'\n", argname);
1306 } else if (!found_flag->is_bool() && has_plus_minus) {
1307 jio_fprintf(defaultStream::error_stream(),
1308 "Unexpected +/- setting in VM option '%s'\n", argname);
1309 } else {
1310 jio_fprintf(defaultStream::error_stream(),
1311 "Improperly specified VM option '%s'\n", argname);
1312 }
1313 } else {
1314 #ifdef PRODUCT
1315 bool mismatched = ((msg_type == JVMFlag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD) ||
1316 (msg_type == JVMFlag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD));
1317 if (ignore_unrecognized && mismatched) {
1318 return true;
1319 }
1320 #endif
1321 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf);
1322 }
1323 } else {
1324 if (ignore_unrecognized) {
1325 return true;
1326 }
1327 jio_fprintf(defaultStream::error_stream(),
1328 "Unrecognized VM option '%s'\n", argname);
1329 JVMFlag* fuzzy_matched = JVMFlag::fuzzy_match((const char*)argname, arg_len, true);
1330 if (fuzzy_matched != NULL) {
1331 jio_fprintf(defaultStream::error_stream(),
1332 "Did you mean '%s%s%s'? ",
1333 (fuzzy_matched->is_bool()) ? "(+/-)" : "",
1334 fuzzy_matched->_name,
1335 (fuzzy_matched->is_bool()) ? "" : "=<value>");
1336 }
1337 }
1338
1339 // allow for commandline "commenting out" options like -XX:#+Verbose
1340 return arg[0] == '#';
1341 }
1342
1343 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) {
1344 FILE* stream = fopen(file_name, "rb");
1345 if (stream == NULL) {
1346 if (should_exist) {
1347 jio_fprintf(defaultStream::error_stream(),
1348 "Could not open settings file %s\n", file_name);
1349 return false;
1350 } else {
1351 return true;
1352 }
1353 }
1354
1355 char token[1024];
1356 int pos = 0;
1357
1358 bool in_white_space = true;
1359 bool in_comment = false;
1360 bool in_quote = false;
1361 char quote_c = 0;
1362 bool result = true;
1363
1364 int c = getc(stream);
1365 while(c != EOF && pos < (int)(sizeof(token)-1)) {
1366 if (in_white_space) {
1367 if (in_comment) {
1368 if (c == '\n') in_comment = false;
1369 } else {
1370 if (c == '#') in_comment = true;
1371 else if (!isspace(c)) {
1372 in_white_space = false;
1373 token[pos++] = c;
1374 }
1375 }
1376 } else {
1377 if (c == '\n' || (!in_quote && isspace(c))) {
1378 // token ends at newline, or at unquoted whitespace
1379 // this allows a way to include spaces in string-valued options
1380 token[pos] = '\0';
1381 logOption(token);
1382 result &= process_argument(token, ignore_unrecognized, JVMFlag::CONFIG_FILE);
1383 build_jvm_flags(token);
1384 pos = 0;
1385 in_white_space = true;
1386 in_quote = false;
1387 } else if (!in_quote && (c == '\'' || c == '"')) {
1388 in_quote = true;
1389 quote_c = c;
1390 } else if (in_quote && (c == quote_c)) {
1391 in_quote = false;
1392 } else {
1393 token[pos++] = c;
1394 }
1395 }
1396 c = getc(stream);
1397 }
1398 if (pos > 0) {
1399 token[pos] = '\0';
1400 result &= process_argument(token, ignore_unrecognized, JVMFlag::CONFIG_FILE);
1401 build_jvm_flags(token);
1402 }
1403 fclose(stream);
1404 return result;
1405 }
1406
1407 //=============================================================================================================
1408 // Parsing of properties (-D)
1409
1410 const char* Arguments::get_property(const char* key) {
1411 return PropertyList_get_value(system_properties(), key);
1412 }
1413
1414 bool Arguments::add_property(const char* prop, PropertyWriteable writeable, PropertyInternal internal) {
1415 const char* eq = strchr(prop, '=');
1416 const char* key;
1417 const char* value = "";
1418
1419 if (eq == NULL) {
1420 // property doesn't have a value, thus use passed string
1421 key = prop;
1422 } else {
1423 // property have a value, thus extract it and save to the
1424 // allocated string
1425 size_t key_len = eq - prop;
1426 char* tmp_key = AllocateHeap(key_len + 1, mtArguments);
1427
1428 jio_snprintf(tmp_key, key_len + 1, "%s", prop);
1429 key = tmp_key;
1430
1431 value = &prop[key_len + 1];
1432 }
1433
1434 if (strcmp(key, "java.compiler") == 0) {
1435 process_java_compiler_argument(value);
1436 // Record value in Arguments, but let it get passed to Java.
1437 } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 ||
1438 strcmp(key, "sun.java.launcher.pid") == 0) {
1439 // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are
1440 // private and are processed in process_sun_java_launcher_properties();
1441 // the sun.java.launcher property is passed on to the java application
1442 } else if (strcmp(key, "sun.boot.library.path") == 0) {
1443 // append is true, writable is true, internal is false
1444 PropertyList_unique_add(&_system_properties, key, value, AppendProperty,
1445 WriteableProperty, ExternalProperty);
1446 } else {
1447 if (strcmp(key, "sun.java.command") == 0) {
1448 char *old_java_command = _java_command;
1449 _java_command = os::strdup_check_oom(value, mtArguments);
1450 if (old_java_command != NULL) {
1451 os::free(old_java_command);
1452 }
1453 } else if (strcmp(key, "java.vendor.url.bug") == 0) {
1454 const char* old_java_vendor_url_bug = _java_vendor_url_bug;
1455 // save it in _java_vendor_url_bug, so JVM fatal error handler can access
1456 // its value without going through the property list or making a Java call.
1457 _java_vendor_url_bug = os::strdup_check_oom(value, mtArguments);
1458 if (old_java_vendor_url_bug != DEFAULT_VENDOR_URL_BUG) {
1459 assert(old_java_vendor_url_bug != NULL, "_java_vendor_url_bug is NULL");
1460 os::free((void *)old_java_vendor_url_bug);
1461 }
1462 }
1463
1464 // Create new property and add at the end of the list
1465 PropertyList_unique_add(&_system_properties, key, value, AddProperty, writeable, internal);
1466 }
1467
1468 if (key != prop) {
1469 // SystemProperty copy passed value, thus free previously allocated
1470 // memory
1471 FreeHeap((void *)key);
1472 }
1473
1474 return true;
1475 }
1476
1477 #if INCLUDE_CDS
1478 const char* unsupported_properties[] = { "jdk.module.limitmods",
1479 "jdk.module.upgrade.path",
1480 "jdk.module.patch.0" };
1481 const char* unsupported_options[] = { "--limit-modules",
1482 "--upgrade-module-path",
1483 "--patch-module"
1484 };
1485 void Arguments::check_unsupported_dumping_properties() {
1486 assert(DumpSharedSpaces, "this function is only used with -Xshare:dump");
1487 assert(ARRAY_SIZE(unsupported_properties) == ARRAY_SIZE(unsupported_options), "must be");
1488 // If a vm option is found in the unsupported_options array, vm will exit with an error message.
1489 SystemProperty* sp = system_properties();
1490 while (sp != NULL) {
1491 for (uint i = 0; i < ARRAY_SIZE(unsupported_properties); i++) {
1492 if (strcmp(sp->key(), unsupported_properties[i]) == 0) {
1493 vm_exit_during_initialization(
1494 "Cannot use the following option when dumping the shared archive", unsupported_options[i]);
1495 }
1496 }
1497 sp = sp->next();
1498 }
1499
1500 // Check for an exploded module build in use with -Xshare:dump.
1501 if (!has_jimage()) {
1502 vm_exit_during_initialization("Dumping the shared archive is not supported with an exploded module build");
1503 }
1504 }
1505
1506 bool Arguments::check_unsupported_cds_runtime_properties() {
1507 assert(UseSharedSpaces, "this function is only used with -Xshare:{on,auto}");
1508 assert(ARRAY_SIZE(unsupported_properties) == ARRAY_SIZE(unsupported_options), "must be");
1509 for (uint i = 0; i < ARRAY_SIZE(unsupported_properties); i++) {
1510 if (get_property(unsupported_properties[i]) != NULL) {
1511 if (RequireSharedSpaces) {
1512 warning("CDS is disabled when the %s option is specified.", unsupported_options[i]);
1513 }
1514 return true;
1515 }
1516 }
1517 return false;
1518 }
1519 #endif
1520
1521 //===========================================================================================================
1522 // Setting int/mixed/comp mode flags
1523
1524 void Arguments::set_mode_flags(Mode mode) {
1525 // Set up default values for all flags.
1526 // If you add a flag to any of the branches below,
1527 // add a default value for it here.
1528 set_java_compiler(false);
1529 _mode = mode;
1530
1531 // Ensure Agent_OnLoad has the correct initial values.
1532 // This may not be the final mode; mode may change later in onload phase.
1533 PropertyList_unique_add(&_system_properties, "java.vm.info",
1534 VM_Version::vm_info_string(), AddProperty, UnwriteableProperty, ExternalProperty);
1535
1536 UseInterpreter = true;
1537 UseCompiler = true;
1538 UseLoopCounter = true;
1539
1540 // Default values may be platform/compiler dependent -
1541 // use the saved values
1542 ClipInlining = Arguments::_ClipInlining;
1543 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods;
1544 UseOnStackReplacement = Arguments::_UseOnStackReplacement;
1545 BackgroundCompilation = Arguments::_BackgroundCompilation;
1546 if (TieredCompilation) {
1547 if (FLAG_IS_DEFAULT(Tier3InvokeNotifyFreqLog)) {
1548 Tier3InvokeNotifyFreqLog = Arguments::_Tier3InvokeNotifyFreqLog;
1549 }
1550 if (FLAG_IS_DEFAULT(Tier4InvocationThreshold)) {
1551 Tier4InvocationThreshold = Arguments::_Tier4InvocationThreshold;
1552 }
1553 }
1554
1555 // Change from defaults based on mode
1556 switch (mode) {
1557 default:
1558 ShouldNotReachHere();
1559 break;
1560 case _int:
1561 UseCompiler = false;
1562 UseLoopCounter = false;
1563 AlwaysCompileLoopMethods = false;
1564 UseOnStackReplacement = false;
1565 break;
1566 case _mixed:
1567 // same as default
1568 break;
1569 case _comp:
1570 UseInterpreter = false;
1571 BackgroundCompilation = false;
1572 ClipInlining = false;
1573 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more.
1574 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and
1575 // compile a level 4 (C2) and then continue executing it.
1576 if (TieredCompilation) {
1577 Tier3InvokeNotifyFreqLog = 0;
1578 Tier4InvocationThreshold = 0;
1579 }
1580 break;
1581 }
1582 }
1583
1584 // Conflict: required to use shared spaces (-Xshare:on), but
1585 // incompatible command line options were chosen.
1586 static void no_shared_spaces(const char* message) {
1587 if (RequireSharedSpaces) {
1588 jio_fprintf(defaultStream::error_stream(),
1589 "Class data sharing is inconsistent with other specified options.\n");
1590 vm_exit_during_initialization("Unable to use shared archive", message);
1591 } else {
1592 FLAG_SET_DEFAULT(UseSharedSpaces, false);
1593 }
1594 }
1595
1596 void set_object_alignment() {
1597 // Object alignment.
1598 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2");
1599 MinObjAlignmentInBytes = ObjectAlignmentInBytes;
1600 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small");
1601 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize;
1602 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect");
1603 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1;
1604
1605 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes);
1606 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize;
1607
1608 // Oop encoding heap max
1609 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes;
1610
1611 if (SurvivorAlignmentInBytes == 0) {
1612 SurvivorAlignmentInBytes = ObjectAlignmentInBytes;
1613 }
1614 }
1615
1616 size_t Arguments::max_heap_for_compressed_oops() {
1617 // Avoid sign flip.
1618 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size");
1619 // We need to fit both the NULL page and the heap into the memory budget, while
1620 // keeping alignment constraints of the heap. To guarantee the latter, as the
1621 // NULL page is located before the heap, we pad the NULL page to the conservative
1622 // maximum alignment that the GC may ever impose upon the heap.
1623 size_t displacement_due_to_null_page = align_up((size_t)os::vm_page_size(),
1624 _conservative_max_heap_alignment);
1625
1626 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page);
1627 NOT_LP64(ShouldNotReachHere(); return 0);
1628 }
1629
1630 void Arguments::set_use_compressed_oops() {
1631 #ifndef ZERO
1632 #ifdef _LP64
1633 // MaxHeapSize is not set up properly at this point, but
1634 // the only value that can override MaxHeapSize if we are
1635 // to use UseCompressedOops is InitialHeapSize.
1636 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize);
1637
1638 if (max_heap_size <= max_heap_for_compressed_oops()) {
1639 #if !defined(COMPILER1) || defined(TIERED)
1640 if (FLAG_IS_DEFAULT(UseCompressedOops)) {
1641 FLAG_SET_ERGO(bool, UseCompressedOops, true);
1642 }
1643 #endif
1644 } else {
1645 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) {
1646 warning("Max heap size too large for Compressed Oops");
1647 FLAG_SET_DEFAULT(UseCompressedOops, false);
1648 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1649 }
1650 }
1651 #endif // _LP64
1652 #endif // ZERO
1653 }
1654
1655
1656 // NOTE: set_use_compressed_klass_ptrs() must be called after calling
1657 // set_use_compressed_oops().
1658 void Arguments::set_use_compressed_klass_ptrs() {
1659 #ifndef ZERO
1660 #ifdef _LP64
1661 // UseCompressedOops must be on for UseCompressedClassPointers to be on.
1662 if (!UseCompressedOops) {
1663 if (UseCompressedClassPointers) {
1664 warning("UseCompressedClassPointers requires UseCompressedOops");
1665 }
1666 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1667 } else {
1668 // Turn on UseCompressedClassPointers too
1669 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) {
1670 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true);
1671 }
1672 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs.
1673 if (UseCompressedClassPointers) {
1674 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) {
1675 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers");
1676 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1677 }
1678 }
1679 }
1680 #endif // _LP64
1681 #endif // !ZERO
1682 }
1683
1684 void Arguments::set_conservative_max_heap_alignment() {
1685 // The conservative maximum required alignment for the heap is the maximum of
1686 // the alignments imposed by several sources: any requirements from the heap
1687 // itself, the collector policy and the maximum page size we may run the VM
1688 // with.
1689 size_t heap_alignment = GCConfig::arguments()->conservative_max_heap_alignment();
1690 _conservative_max_heap_alignment = MAX4(heap_alignment,
1691 (size_t)os::vm_allocation_granularity(),
1692 os::max_page_size(),
1693 CollectorPolicy::compute_heap_alignment());
1694 }
1695
1696 jint Arguments::set_ergonomics_flags() {
1697 GCConfig::initialize();
1698
1699 set_conservative_max_heap_alignment();
1700
1701 #ifndef ZERO
1702 #ifdef _LP64
1703 set_use_compressed_oops();
1704
1705 // set_use_compressed_klass_ptrs() must be called after calling
1706 // set_use_compressed_oops().
1707 set_use_compressed_klass_ptrs();
1708
1709 // Also checks that certain machines are slower with compressed oops
1710 // in vm_version initialization code.
1711 #endif // _LP64
1712 #endif // !ZERO
1713
1714 return JNI_OK;
1715 }
1716
1717 julong Arguments::limit_by_allocatable_memory(julong limit) {
1718 julong max_allocatable;
1719 julong result = limit;
1720 if (os::has_allocatable_memory_limit(&max_allocatable)) {
1721 result = MIN2(result, max_allocatable / MaxVirtMemFraction);
1722 }
1723 return result;
1724 }
1725
1726 // Use static initialization to get the default before parsing
1727 static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress;
1728
1729 void Arguments::set_heap_size() {
1730 julong phys_mem =
1731 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM)
1732 : (julong)MaxRAM;
1733
1734 // Convert deprecated flags
1735 if (FLAG_IS_DEFAULT(MaxRAMPercentage) &&
1736 !FLAG_IS_DEFAULT(MaxRAMFraction))
1737 MaxRAMPercentage = 100.0 / MaxRAMFraction;
1738
1739 if (FLAG_IS_DEFAULT(MinRAMPercentage) &&
1740 !FLAG_IS_DEFAULT(MinRAMFraction))
1741 MinRAMPercentage = 100.0 / MinRAMFraction;
1742
1743 if (FLAG_IS_DEFAULT(InitialRAMPercentage) &&
1744 !FLAG_IS_DEFAULT(InitialRAMFraction))
1745 InitialRAMPercentage = 100.0 / InitialRAMFraction;
1746
1747 // If the maximum heap size has not been set with -Xmx,
1748 // then set it as fraction of the size of physical memory,
1749 // respecting the maximum and minimum sizes of the heap.
1750 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
1751 julong reasonable_max = (julong)((phys_mem * MaxRAMPercentage) / 100);
1752 const julong reasonable_min = (julong)((phys_mem * MinRAMPercentage) / 100);
1753 if (reasonable_min < MaxHeapSize) {
1754 // Small physical memory, so use a minimum fraction of it for the heap
1755 reasonable_max = reasonable_min;
1756 } else {
1757 // Not-small physical memory, so require a heap at least
1758 // as large as MaxHeapSize
1759 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize);
1760 }
1761
1762 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) {
1763 // Limit the heap size to ErgoHeapSizeLimit
1764 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit);
1765 }
1766 if (UseCompressedOops) {
1767 // Limit the heap size to the maximum possible when using compressed oops
1768 julong max_coop_heap = (julong)max_heap_for_compressed_oops();
1769
1770 // HeapBaseMinAddress can be greater than default but not less than.
1771 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) {
1772 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) {
1773 // matches compressed oops printing flags
1774 log_debug(gc, heap, coops)("HeapBaseMinAddress must be at least " SIZE_FORMAT
1775 " (" SIZE_FORMAT "G) which is greater than value given " SIZE_FORMAT,
1776 DefaultHeapBaseMinAddress,
1777 DefaultHeapBaseMinAddress/G,
1778 HeapBaseMinAddress);
1779 FLAG_SET_ERGO(size_t, HeapBaseMinAddress, DefaultHeapBaseMinAddress);
1780 }
1781 }
1782
1783 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) {
1784 // Heap should be above HeapBaseMinAddress to get zero based compressed oops
1785 // but it should be not less than default MaxHeapSize.
1786 max_coop_heap -= HeapBaseMinAddress;
1787 }
1788 reasonable_max = MIN2(reasonable_max, max_coop_heap);
1789 }
1790 reasonable_max = limit_by_allocatable_memory(reasonable_max);
1791
1792 if (!FLAG_IS_DEFAULT(InitialHeapSize)) {
1793 // An initial heap size was specified on the command line,
1794 // so be sure that the maximum size is consistent. Done
1795 // after call to limit_by_allocatable_memory because that
1796 // method might reduce the allocation size.
1797 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize);
1798 }
1799
1800 log_trace(gc, heap)(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max);
1801 FLAG_SET_ERGO(size_t, MaxHeapSize, (size_t)reasonable_max);
1802 }
1803
1804 // If the minimum or initial heap_size have not been set or requested to be set
1805 // ergonomically, set them accordingly.
1806 if (InitialHeapSize == 0 || min_heap_size() == 0) {
1807 julong reasonable_minimum = (julong)(OldSize + NewSize);
1808
1809 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize);
1810
1811 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum);
1812
1813 if (InitialHeapSize == 0) {
1814 julong reasonable_initial = (julong)((phys_mem * InitialRAMPercentage) / 100);
1815
1816 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size());
1817 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize);
1818
1819 reasonable_initial = limit_by_allocatable_memory(reasonable_initial);
1820
1821 log_trace(gc, heap)(" Initial heap size " SIZE_FORMAT, (size_t)reasonable_initial);
1822 FLAG_SET_ERGO(size_t, InitialHeapSize, (size_t)reasonable_initial);
1823 }
1824 // If the minimum heap size has not been set (via -Xms),
1825 // synchronize with InitialHeapSize to avoid errors with the default value.
1826 if (min_heap_size() == 0) {
1827 set_min_heap_size(MIN2((size_t)reasonable_minimum, InitialHeapSize));
1828 log_trace(gc, heap)(" Minimum heap size " SIZE_FORMAT, min_heap_size());
1829 }
1830 }
1831 }
1832
1833 // This option inspects the machine and attempts to set various
1834 // parameters to be optimal for long-running, memory allocation
1835 // intensive jobs. It is intended for machines with large
1836 // amounts of cpu and memory.
1837 jint Arguments::set_aggressive_heap_flags() {
1838 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit
1839 // VM, but we may not be able to represent the total physical memory
1840 // available (like having 8gb of memory on a box but using a 32bit VM).
1841 // Thus, we need to make sure we're using a julong for intermediate
1842 // calculations.
1843 julong initHeapSize;
1844 julong total_memory = os::physical_memory();
1845
1846 if (total_memory < (julong) 256 * M) {
1847 jio_fprintf(defaultStream::error_stream(),
1848 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n");
1849 vm_exit(1);
1850 }
1851
1852 // The heap size is half of available memory, or (at most)
1853 // all of possible memory less 160mb (leaving room for the OS
1854 // when using ISM). This is the maximum; because adaptive sizing
1855 // is turned on below, the actual space used may be smaller.
1856
1857 initHeapSize = MIN2(total_memory / (julong) 2,
1858 total_memory - (julong) 160 * M);
1859
1860 initHeapSize = limit_by_allocatable_memory(initHeapSize);
1861
1862 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
1863 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, initHeapSize) != JVMFlag::SUCCESS) {
1864 return JNI_EINVAL;
1865 }
1866 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, initHeapSize) != JVMFlag::SUCCESS) {
1867 return JNI_EINVAL;
1868 }
1869 // Currently the minimum size and the initial heap sizes are the same.
1870 set_min_heap_size(initHeapSize);
1871 }
1872 if (FLAG_IS_DEFAULT(NewSize)) {
1873 // Make the young generation 3/8ths of the total heap.
1874 if (FLAG_SET_CMDLINE(size_t, NewSize,
1875 ((julong) MaxHeapSize / (julong) 8) * (julong) 3) != JVMFlag::SUCCESS) {
1876 return JNI_EINVAL;
1877 }
1878 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, NewSize) != JVMFlag::SUCCESS) {
1879 return JNI_EINVAL;
1880 }
1881 }
1882
1883 #if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
1884 FLAG_SET_DEFAULT(UseLargePages, true);
1885 #endif
1886
1887 // Increase some data structure sizes for efficiency
1888 if (FLAG_SET_CMDLINE(size_t, BaseFootPrintEstimate, MaxHeapSize) != JVMFlag::SUCCESS) {
1889 return JNI_EINVAL;
1890 }
1891 if (FLAG_SET_CMDLINE(bool, ResizeTLAB, false) != JVMFlag::SUCCESS) {
1892 return JNI_EINVAL;
1893 }
1894 if (FLAG_SET_CMDLINE(size_t, TLABSize, 256 * K) != JVMFlag::SUCCESS) {
1895 return JNI_EINVAL;
1896 }
1897
1898 // See the OldPLABSize comment below, but replace 'after promotion'
1899 // with 'after copying'. YoungPLABSize is the size of the survivor
1900 // space per-gc-thread buffers. The default is 4kw.
1901 if (FLAG_SET_CMDLINE(size_t, YoungPLABSize, 256 * K) != JVMFlag::SUCCESS) { // Note: this is in words
1902 return JNI_EINVAL;
1903 }
1904
1905 // OldPLABSize is the size of the buffers in the old gen that
1906 // UseParallelGC uses to promote live data that doesn't fit in the
1907 // survivor spaces. At any given time, there's one for each gc thread.
1908 // The default size is 1kw. These buffers are rarely used, since the
1909 // survivor spaces are usually big enough. For specjbb, however, there
1910 // are occasions when there's lots of live data in the young gen
1911 // and we end up promoting some of it. We don't have a definite
1912 // explanation for why bumping OldPLABSize helps, but the theory
1913 // is that a bigger PLAB results in retaining something like the
1914 // original allocation order after promotion, which improves mutator
1915 // locality. A minor effect may be that larger PLABs reduce the
1916 // number of PLAB allocation events during gc. The value of 8kw
1917 // was arrived at by experimenting with specjbb.
1918 if (FLAG_SET_CMDLINE(size_t, OldPLABSize, 8 * K) != JVMFlag::SUCCESS) { // Note: this is in words
1919 return JNI_EINVAL;
1920 }
1921
1922 // Enable parallel GC and adaptive generation sizing
1923 if (FLAG_SET_CMDLINE(bool, UseParallelGC, true) != JVMFlag::SUCCESS) {
1924 return JNI_EINVAL;
1925 }
1926
1927 // Encourage steady state memory management
1928 if (FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100) != JVMFlag::SUCCESS) {
1929 return JNI_EINVAL;
1930 }
1931
1932 // This appears to improve mutator locality
1933 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != JVMFlag::SUCCESS) {
1934 return JNI_EINVAL;
1935 }
1936
1937 // Get around early Solaris scheduling bug
1938 // (affinity vs other jobs on system)
1939 // but disallow DR and offlining (5008695).
1940 if (FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true) != JVMFlag::SUCCESS) {
1941 return JNI_EINVAL;
1942 }
1943
1944 return JNI_OK;
1945 }
1946
1947 // This must be called after ergonomics.
1948 void Arguments::set_bytecode_flags() {
1949 if (!RewriteBytecodes) {
1950 FLAG_SET_DEFAULT(RewriteFrequentPairs, false);
1951 }
1952 }
1953
1954 // Aggressive optimization flags -XX:+AggressiveOpts
1955 jint Arguments::set_aggressive_opts_flags() {
1956 #ifdef COMPILER2
1957 if (AggressiveUnboxing) {
1958 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
1959 FLAG_SET_DEFAULT(EliminateAutoBox, true);
1960 } else if (!EliminateAutoBox) {
1961 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled");
1962 AggressiveUnboxing = false;
1963 }
1964 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) {
1965 FLAG_SET_DEFAULT(DoEscapeAnalysis, true);
1966 } else if (!DoEscapeAnalysis) {
1967 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled");
1968 AggressiveUnboxing = false;
1969 }
1970 }
1971 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
1972 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
1973 FLAG_SET_DEFAULT(EliminateAutoBox, true);
1974 }
1975 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
1976 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000);
1977 }
1978
1979 // Feed the cache size setting into the JDK
1980 char buffer[1024];
1981 jio_snprintf(buffer, 1024, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax);
1982 if (!add_property(buffer)) {
1983 return JNI_ENOMEM;
1984 }
1985 }
1986 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) {
1987 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500);
1988 }
1989 #endif
1990
1991 if (AggressiveOpts) {
1992 // Sample flag setting code
1993 // if (FLAG_IS_DEFAULT(EliminateZeroing)) {
1994 // FLAG_SET_DEFAULT(EliminateZeroing, true);
1995 // }
1996 }
1997
1998 return JNI_OK;
1999 }
2000
2001 //===========================================================================================================
2002 // Parsing of java.compiler property
2003
2004 void Arguments::process_java_compiler_argument(const char* arg) {
2005 // For backwards compatibility, Djava.compiler=NONE or ""
2006 // causes us to switch to -Xint mode UNLESS -Xdebug
2007 // is also specified.
2008 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) {
2009 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen.
2010 }
2011 }
2012
2013 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) {
2014 _sun_java_launcher = os::strdup_check_oom(launcher);
2015 }
2016
2017 bool Arguments::created_by_java_launcher() {
2018 assert(_sun_java_launcher != NULL, "property must have value");
2019 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0;
2020 }
2021
2022 bool Arguments::sun_java_launcher_is_altjvm() {
2023 return _sun_java_launcher_is_altjvm;
2024 }
2025
2026 //===========================================================================================================
2027 // Parsing of main arguments
2028
2029 unsigned int addreads_count = 0;
2030 unsigned int addexports_count = 0;
2031 unsigned int addopens_count = 0;
2032 unsigned int addmods_count = 0;
2033 unsigned int patch_mod_count = 0;
2034
2035 // Check the consistency of vm_init_args
2036 bool Arguments::check_vm_args_consistency() {
2037 // Method for adding checks for flag consistency.
2038 // The intent is to warn the user of all possible conflicts,
2039 // before returning an error.
2040 // Note: Needs platform-dependent factoring.
2041 bool status = true;
2042
2043 if (TLABRefillWasteFraction == 0) {
2044 jio_fprintf(defaultStream::error_stream(),
2045 "TLABRefillWasteFraction should be a denominator, "
2046 "not " SIZE_FORMAT "\n",
2047 TLABRefillWasteFraction);
2048 status = false;
2049 }
2050
2051 if (PrintNMTStatistics) {
2052 #if INCLUDE_NMT
2053 if (MemTracker::tracking_level() == NMT_off) {
2054 #endif // INCLUDE_NMT
2055 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled");
2056 PrintNMTStatistics = false;
2057 #if INCLUDE_NMT
2058 }
2059 #endif
2060 }
2061
2062 status = CompilerConfig::check_args_consistency(status);
2063 #if INCLUDE_JVMCI
2064 if (status && EnableJVMCI) {
2065 PropertyList_unique_add(&_system_properties, "jdk.internal.vm.ci.enabled", "true",
2066 AddProperty, UnwriteableProperty, InternalProperty);
2067 if (!create_numbered_property("jdk.module.addmods", "jdk.internal.vm.ci", addmods_count++)) {
2068 return false;
2069 }
2070 }
2071 #endif
2072
2073 #ifndef SUPPORT_RESERVED_STACK_AREA
2074 if (StackReservedPages != 0) {
2075 FLAG_SET_CMDLINE(intx, StackReservedPages, 0);
2076 warning("Reserved Stack Area not supported on this platform");
2077 }
2078 #endif
2079
2080 if (!FLAG_IS_DEFAULT(AllocateHeapAt)) {
2081 if ((UseNUMAInterleaving && !FLAG_IS_DEFAULT(UseNUMAInterleaving)) || (UseNUMA && !FLAG_IS_DEFAULT(UseNUMA))) {
2082 log_warning(arguments) ("NUMA support for Heap depends on the file system when AllocateHeapAt option is used.\n");
2083 }
2084 }
2085 return status;
2086 }
2087
2088 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore,
2089 const char* option_type) {
2090 if (ignore) return false;
2091
2092 const char* spacer = " ";
2093 if (option_type == NULL) {
2094 option_type = ++spacer; // Set both to the empty string.
2095 }
2096
2097 if (os::obsolete_option(option)) {
2098 jio_fprintf(defaultStream::error_stream(),
2099 "Obsolete %s%soption: %s\n", option_type, spacer,
2100 option->optionString);
2101 return false;
2102 } else {
2103 jio_fprintf(defaultStream::error_stream(),
2104 "Unrecognized %s%soption: %s\n", option_type, spacer,
2105 option->optionString);
2106 return true;
2107 }
2108 }
2109
2110 static const char* user_assertion_options[] = {
2111 "-da", "-ea", "-disableassertions", "-enableassertions", 0
2112 };
2113
2114 static const char* system_assertion_options[] = {
2115 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0
2116 };
2117
2118 bool Arguments::parse_uintx(const char* value,
2119 uintx* uintx_arg,
2120 uintx min_size) {
2121
2122 // Check the sign first since atojulong() parses only unsigned values.
2123 bool value_is_positive = !(*value == '-');
2124
2125 if (value_is_positive) {
2126 julong n;
2127 bool good_return = atojulong(value, &n);
2128 if (good_return) {
2129 bool above_minimum = n >= min_size;
2130 bool value_is_too_large = n > max_uintx;
2131
2132 if (above_minimum && !value_is_too_large) {
2133 *uintx_arg = n;
2134 return true;
2135 }
2136 }
2137 }
2138 return false;
2139 }
2140
2141 bool Arguments::create_property(const char* prop_name, const char* prop_value, PropertyInternal internal) {
2142 size_t prop_len = strlen(prop_name) + strlen(prop_value) + 2;
2143 char* property = AllocateHeap(prop_len, mtArguments);
2144 int ret = jio_snprintf(property, prop_len, "%s=%s", prop_name, prop_value);
2145 if (ret < 0 || ret >= (int)prop_len) {
2146 FreeHeap(property);
2147 return false;
2148 }
2149 bool added = add_property(property, UnwriteableProperty, internal);
2150 FreeHeap(property);
2151 return added;
2152 }
2153
2154 bool Arguments::create_numbered_property(const char* prop_base_name, const char* prop_value, unsigned int count) {
2155 const unsigned int props_count_limit = 1000;
2156 const int max_digits = 3;
2157 const int extra_symbols_count = 3; // includes '.', '=', '\0'
2158
2159 // Make sure count is < props_count_limit. Otherwise, memory allocation will be too small.
2160 if (count < props_count_limit) {
2161 size_t prop_len = strlen(prop_base_name) + strlen(prop_value) + max_digits + extra_symbols_count;
2162 char* property = AllocateHeap(prop_len, mtArguments);
2163 int ret = jio_snprintf(property, prop_len, "%s.%d=%s", prop_base_name, count, prop_value);
2164 if (ret < 0 || ret >= (int)prop_len) {
2165 FreeHeap(property);
2166 jio_fprintf(defaultStream::error_stream(), "Failed to create property %s.%d=%s\n", prop_base_name, count, prop_value);
2167 return false;
2168 }
2169 bool added = add_property(property, UnwriteableProperty, InternalProperty);
2170 FreeHeap(property);
2171 return added;
2172 }
2173
2174 jio_fprintf(defaultStream::error_stream(), "Property count limit exceeded: %s, limit=%d\n", prop_base_name, props_count_limit);
2175 return false;
2176 }
2177
2178 Arguments::ArgsRange Arguments::parse_memory_size(const char* s,
2179 julong* long_arg,
2180 julong min_size,
2181 julong max_size) {
2182 if (!atojulong(s, long_arg)) return arg_unreadable;
2183 return check_memory_size(*long_arg, min_size, max_size);
2184 }
2185
2186 // Parse JavaVMInitArgs structure
2187
2188 jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args,
2189 const JavaVMInitArgs *java_options_args,
2190 const JavaVMInitArgs *cmd_line_args) {
2191 bool patch_mod_javabase = false;
2192
2193 // Save default settings for some mode flags
2194 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
2195 Arguments::_UseOnStackReplacement = UseOnStackReplacement;
2196 Arguments::_ClipInlining = ClipInlining;
2197 Arguments::_BackgroundCompilation = BackgroundCompilation;
2198 if (TieredCompilation) {
2199 Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
2200 Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
2201 }
2202
2203 // Setup flags for mixed which is the default
2204 set_mode_flags(_mixed);
2205
2206 // Parse args structure generated from JAVA_TOOL_OPTIONS environment
2207 // variable (if present).
2208 jint result = parse_each_vm_init_arg(java_tool_options_args, &patch_mod_javabase, JVMFlag::ENVIRON_VAR);
2209 if (result != JNI_OK) {
2210 return result;
2211 }
2212
2213 // Parse args structure generated from the command line flags.
2214 result = parse_each_vm_init_arg(cmd_line_args, &patch_mod_javabase, JVMFlag::COMMAND_LINE);
2215 if (result != JNI_OK) {
2216 return result;
2217 }
2218
2219 // Parse args structure generated from the _JAVA_OPTIONS environment
2220 // variable (if present) (mimics classic VM)
2221 result = parse_each_vm_init_arg(java_options_args, &patch_mod_javabase, JVMFlag::ENVIRON_VAR);
2222 if (result != JNI_OK) {
2223 return result;
2224 }
2225
2226 // We need to ensure processor and memory resources have been properly
2227 // configured - which may rely on arguments we just processed - before
2228 // doing the final argument processing. Any argument processing that
2229 // needs to know about processor and memory resources must occur after
2230 // this point.
2231
2232 os::init_container_support();
2233
2234 // Do final processing now that all arguments have been parsed
2235 result = finalize_vm_init_args(patch_mod_javabase);
2236 if (result != JNI_OK) {
2237 return result;
2238 }
2239
2240 return JNI_OK;
2241 }
2242
2243 // Checks if name in command-line argument -agent{lib,path}:name[=options]
2244 // represents a valid JDWP agent. is_path==true denotes that we
2245 // are dealing with -agentpath (case where name is a path), otherwise with
2246 // -agentlib
2247 bool valid_jdwp_agent(char *name, bool is_path) {
2248 char *_name;
2249 const char *_jdwp = "jdwp";
2250 size_t _len_jdwp, _len_prefix;
2251
2252 if (is_path) {
2253 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) {
2254 return false;
2255 }
2256
2257 _name++; // skip past last path separator
2258 _len_prefix = strlen(JNI_LIB_PREFIX);
2259
2260 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) {
2261 return false;
2262 }
2263
2264 _name += _len_prefix;
2265 _len_jdwp = strlen(_jdwp);
2266
2267 if (strncmp(_name, _jdwp, _len_jdwp) == 0) {
2268 _name += _len_jdwp;
2269 }
2270 else {
2271 return false;
2272 }
2273
2274 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) {
2275 return false;
2276 }
2277
2278 return true;
2279 }
2280
2281 if (strcmp(name, _jdwp) == 0) {
2282 return true;
2283 }
2284
2285 return false;
2286 }
2287
2288 int Arguments::process_patch_mod_option(const char* patch_mod_tail, bool* patch_mod_javabase) {
2289 // --patch-module=<module>=<file>(<pathsep><file>)*
2290 assert(patch_mod_tail != NULL, "Unexpected NULL patch-module value");
2291 // Find the equal sign between the module name and the path specification
2292 const char* module_equal = strchr(patch_mod_tail, '=');
2293 if (module_equal == NULL) {
2294 jio_fprintf(defaultStream::output_stream(), "Missing '=' in --patch-module specification\n");
2295 return JNI_ERR;
2296 } else {
2297 // Pick out the module name
2298 size_t module_len = module_equal - patch_mod_tail;
2299 char* module_name = NEW_C_HEAP_ARRAY_RETURN_NULL(char, module_len+1, mtArguments);
2300 if (module_name != NULL) {
2301 memcpy(module_name, patch_mod_tail, module_len);
2302 *(module_name + module_len) = '\0';
2303 // The path piece begins one past the module_equal sign
2304 add_patch_mod_prefix(module_name, module_equal + 1, patch_mod_javabase);
2305 FREE_C_HEAP_ARRAY(char, module_name);
2306 if (!create_numbered_property("jdk.module.patch", patch_mod_tail, patch_mod_count++)) {
2307 return JNI_ENOMEM;
2308 }
2309 } else {
2310 return JNI_ENOMEM;
2311 }
2312 }
2313 return JNI_OK;
2314 }
2315
2316 // Parse -Xss memory string parameter and convert to ThreadStackSize in K.
2317 jint Arguments::parse_xss(const JavaVMOption* option, const char* tail, intx* out_ThreadStackSize) {
2318 // The min and max sizes match the values in globals.hpp, but scaled
2319 // with K. The values have been chosen so that alignment with page
2320 // size doesn't change the max value, which makes the conversions
2321 // back and forth between Xss value and ThreadStackSize value easier.
2322 // The values have also been chosen to fit inside a 32-bit signed type.
2323 const julong min_ThreadStackSize = 0;
2324 const julong max_ThreadStackSize = 1 * M;
2325
2326 const julong min_size = min_ThreadStackSize * K;
2327 const julong max_size = max_ThreadStackSize * K;
2328
2329 assert(is_aligned(max_size, os::vm_page_size()), "Implementation assumption");
2330
2331 julong size = 0;
2332 ArgsRange errcode = parse_memory_size(tail, &size, min_size, max_size);
2333 if (errcode != arg_in_range) {
2334 bool silent = (option == NULL); // Allow testing to silence error messages
2335 if (!silent) {
2336 jio_fprintf(defaultStream::error_stream(),
2337 "Invalid thread stack size: %s\n", option->optionString);
2338 describe_range_error(errcode);
2339 }
2340 return JNI_EINVAL;
2341 }
2342
2343 // Internally track ThreadStackSize in units of 1024 bytes.
2344 const julong size_aligned = align_up(size, K);
2345 assert(size <= size_aligned,
2346 "Overflow: " JULONG_FORMAT " " JULONG_FORMAT,
2347 size, size_aligned);
2348
2349 const julong size_in_K = size_aligned / K;
2350 assert(size_in_K < (julong)max_intx,
2351 "size_in_K doesn't fit in the type of ThreadStackSize: " JULONG_FORMAT,
2352 size_in_K);
2353
2354 // Check that code expanding ThreadStackSize to a page aligned number of bytes won't overflow.
2355 const julong max_expanded = align_up(size_in_K * K, os::vm_page_size());
2356 assert(max_expanded < max_uintx && max_expanded >= size_in_K,
2357 "Expansion overflowed: " JULONG_FORMAT " " JULONG_FORMAT,
2358 max_expanded, size_in_K);
2359
2360 *out_ThreadStackSize = (intx)size_in_K;
2361
2362 return JNI_OK;
2363 }
2364
2365 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, bool* patch_mod_javabase, JVMFlag::Flags origin) {
2366 // For match_option to return remaining or value part of option string
2367 const char* tail;
2368
2369 // iterate over arguments
2370 for (int index = 0; index < args->nOptions; index++) {
2371 bool is_absolute_path = false; // for -agentpath vs -agentlib
2372
2373 const JavaVMOption* option = args->options + index;
2374
2375 if (!match_option(option, "-Djava.class.path", &tail) &&
2376 !match_option(option, "-Dsun.java.command", &tail) &&
2377 !match_option(option, "-Dsun.java.launcher", &tail)) {
2378
2379 // add all jvm options to the jvm_args string. This string
2380 // is used later to set the java.vm.args PerfData string constant.
2381 // the -Djava.class.path and the -Dsun.java.command options are
2382 // omitted from jvm_args string as each have their own PerfData
2383 // string constant object.
2384 build_jvm_args(option->optionString);
2385 }
2386
2387 // -verbose:[class/module/gc/jni]
2388 if (match_option(option, "-verbose", &tail)) {
2389 if (!strcmp(tail, ":class") || !strcmp(tail, "")) {
2390 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, load));
2391 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, unload));
2392 } else if (!strcmp(tail, ":module")) {
2393 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, load));
2394 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, unload));
2395 } else if (!strcmp(tail, ":gc")) {
2396 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
2397 } else if (!strcmp(tail, ":jni")) {
2398 if (FLAG_SET_CMDLINE(bool, PrintJNIResolving, true) != JVMFlag::SUCCESS) {
2399 return JNI_EINVAL;
2400 }
2401 }
2402 // -da / -ea / -disableassertions / -enableassertions
2403 // These accept an optional class/package name separated by a colon, e.g.,
2404 // -da:java.lang.Thread.
2405 } else if (match_option(option, user_assertion_options, &tail, true)) {
2406 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2407 if (*tail == '\0') {
2408 JavaAssertions::setUserClassDefault(enable);
2409 } else {
2410 assert(*tail == ':', "bogus match by match_option()");
2411 JavaAssertions::addOption(tail + 1, enable);
2412 }
2413 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions
2414 } else if (match_option(option, system_assertion_options, &tail, false)) {
2415 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2416 JavaAssertions::setSystemClassDefault(enable);
2417 // -bootclasspath:
2418 } else if (match_option(option, "-Xbootclasspath:", &tail)) {
2419 jio_fprintf(defaultStream::output_stream(),
2420 "-Xbootclasspath is no longer a supported option.\n");
2421 return JNI_EINVAL;
2422 // -bootclasspath/a:
2423 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) {
2424 Arguments::append_sysclasspath(tail);
2425 // -bootclasspath/p:
2426 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) {
2427 jio_fprintf(defaultStream::output_stream(),
2428 "-Xbootclasspath/p is no longer a supported option.\n");
2429 return JNI_EINVAL;
2430 // -Xrun
2431 } else if (match_option(option, "-Xrun", &tail)) {
2432 if (tail != NULL) {
2433 const char* pos = strchr(tail, ':');
2434 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2435 char* name = NEW_C_HEAP_ARRAY(char, len + 1, mtArguments);
2436 jio_snprintf(name, len + 1, "%s", tail);
2437
2438 char *options = NULL;
2439 if(pos != NULL) {
2440 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied.
2441 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtArguments), pos+1, len2);
2442 }
2443 #if !INCLUDE_JVMTI
2444 if (strcmp(name, "jdwp") == 0) {
2445 jio_fprintf(defaultStream::error_stream(),
2446 "Debugging agents are not supported in this VM\n");
2447 return JNI_ERR;
2448 }
2449 #endif // !INCLUDE_JVMTI
2450 add_init_library(name, options);
2451 }
2452 } else if (match_option(option, "--add-reads=", &tail)) {
2453 if (!create_numbered_property("jdk.module.addreads", tail, addreads_count++)) {
2454 return JNI_ENOMEM;
2455 }
2456 } else if (match_option(option, "--add-exports=", &tail)) {
2457 if (!create_numbered_property("jdk.module.addexports", tail, addexports_count++)) {
2458 return JNI_ENOMEM;
2459 }
2460 } else if (match_option(option, "--add-opens=", &tail)) {
2461 if (!create_numbered_property("jdk.module.addopens", tail, addopens_count++)) {
2462 return JNI_ENOMEM;
2463 }
2464 } else if (match_option(option, "--add-modules=", &tail)) {
2465 if (!create_numbered_property("jdk.module.addmods", tail, addmods_count++)) {
2466 return JNI_ENOMEM;
2467 }
2468 } else if (match_option(option, "--limit-modules=", &tail)) {
2469 if (!create_property("jdk.module.limitmods", tail, InternalProperty)) {
2470 return JNI_ENOMEM;
2471 }
2472 } else if (match_option(option, "--module-path=", &tail)) {
2473 if (!create_property("jdk.module.path", tail, ExternalProperty)) {
2474 return JNI_ENOMEM;
2475 }
2476 } else if (match_option(option, "--upgrade-module-path=", &tail)) {
2477 if (!create_property("jdk.module.upgrade.path", tail, ExternalProperty)) {
2478 return JNI_ENOMEM;
2479 }
2480 } else if (match_option(option, "--patch-module=", &tail)) {
2481 // --patch-module=<module>=<file>(<pathsep><file>)*
2482 int res = process_patch_mod_option(tail, patch_mod_javabase);
2483 if (res != JNI_OK) {
2484 return res;
2485 }
2486 } else if (match_option(option, "--illegal-access=", &tail)) {
2487 if (!create_property("jdk.module.illegalAccess", tail, ExternalProperty)) {
2488 return JNI_ENOMEM;
2489 }
2490 // -agentlib and -agentpath
2491 } else if (match_option(option, "-agentlib:", &tail) ||
2492 (is_absolute_path = match_option(option, "-agentpath:", &tail))) {
2493 if(tail != NULL) {
2494 const char* pos = strchr(tail, '=');
2495 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2496 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtArguments), tail, len);
2497 name[len] = '\0';
2498
2499 char *options = NULL;
2500 if(pos != NULL) {
2501 options = os::strdup_check_oom(pos + 1, mtArguments);
2502 }
2503 #if !INCLUDE_JVMTI
2504 if (valid_jdwp_agent(name, is_absolute_path)) {
2505 jio_fprintf(defaultStream::error_stream(),
2506 "Debugging agents are not supported in this VM\n");
2507 return JNI_ERR;
2508 }
2509 #endif // !INCLUDE_JVMTI
2510 add_init_agent(name, options, is_absolute_path);
2511 }
2512 // -javaagent
2513 } else if (match_option(option, "-javaagent:", &tail)) {
2514 #if !INCLUDE_JVMTI
2515 jio_fprintf(defaultStream::error_stream(),
2516 "Instrumentation agents are not supported in this VM\n");
2517 return JNI_ERR;
2518 #else
2519 if (tail != NULL) {
2520 size_t length = strlen(tail) + 1;
2521 char *options = NEW_C_HEAP_ARRAY(char, length, mtArguments);
2522 jio_snprintf(options, length, "%s", tail);
2523 add_instrument_agent("instrument", options, false);
2524 // java agents need module java.instrument
2525 if (!create_numbered_property("jdk.module.addmods", "java.instrument", addmods_count++)) {
2526 return JNI_ENOMEM;
2527 }
2528 }
2529 #endif // !INCLUDE_JVMTI
2530 // --enable_preview
2531 } else if (match_option(option, "--enable-preview")) {
2532 set_enable_preview();
2533 // -Xnoclassgc
2534 } else if (match_option(option, "-Xnoclassgc")) {
2535 if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != JVMFlag::SUCCESS) {
2536 return JNI_EINVAL;
2537 }
2538 // -Xconcgc
2539 } else if (match_option(option, "-Xconcgc")) {
2540 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true) != JVMFlag::SUCCESS) {
2541 return JNI_EINVAL;
2542 }
2543 handle_extra_cms_flags("-Xconcgc uses UseConcMarkSweepGC");
2544 // -Xnoconcgc
2545 } else if (match_option(option, "-Xnoconcgc")) {
2546 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false) != JVMFlag::SUCCESS) {
2547 return JNI_EINVAL;
2548 }
2549 handle_extra_cms_flags("-Xnoconcgc uses UseConcMarkSweepGC");
2550 // -Xbatch
2551 } else if (match_option(option, "-Xbatch")) {
2552 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != JVMFlag::SUCCESS) {
2553 return JNI_EINVAL;
2554 }
2555 // -Xmn for compatibility with other JVM vendors
2556 } else if (match_option(option, "-Xmn", &tail)) {
2557 julong long_initial_young_size = 0;
2558 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1);
2559 if (errcode != arg_in_range) {
2560 jio_fprintf(defaultStream::error_stream(),
2561 "Invalid initial young generation size: %s\n", option->optionString);
2562 describe_range_error(errcode);
2563 return JNI_EINVAL;
2564 }
2565 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, (size_t)long_initial_young_size) != JVMFlag::SUCCESS) {
2566 return JNI_EINVAL;
2567 }
2568 if (FLAG_SET_CMDLINE(size_t, NewSize, (size_t)long_initial_young_size) != JVMFlag::SUCCESS) {
2569 return JNI_EINVAL;
2570 }
2571 // -Xms
2572 } else if (match_option(option, "-Xms", &tail)) {
2573 julong long_initial_heap_size = 0;
2574 // an initial heap size of 0 means automatically determine
2575 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0);
2576 if (errcode != arg_in_range) {
2577 jio_fprintf(defaultStream::error_stream(),
2578 "Invalid initial heap size: %s\n", option->optionString);
2579 describe_range_error(errcode);
2580 return JNI_EINVAL;
2581 }
2582 set_min_heap_size((size_t)long_initial_heap_size);
2583 // Currently the minimum size and the initial heap sizes are the same.
2584 // Can be overridden with -XX:InitialHeapSize.
2585 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, (size_t)long_initial_heap_size) != JVMFlag::SUCCESS) {
2586 return JNI_EINVAL;
2587 }
2588 // -Xmx
2589 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) {
2590 julong long_max_heap_size = 0;
2591 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1);
2592 if (errcode != arg_in_range) {
2593 jio_fprintf(defaultStream::error_stream(),
2594 "Invalid maximum heap size: %s\n", option->optionString);
2595 describe_range_error(errcode);
2596 return JNI_EINVAL;
2597 }
2598 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, (size_t)long_max_heap_size) != JVMFlag::SUCCESS) {
2599 return JNI_EINVAL;
2600 }
2601 // Xmaxf
2602 } else if (match_option(option, "-Xmaxf", &tail)) {
2603 char* err;
2604 int maxf = (int)(strtod(tail, &err) * 100);
2605 if (*err != '\0' || *tail == '\0') {
2606 jio_fprintf(defaultStream::error_stream(),
2607 "Bad max heap free percentage size: %s\n",
2608 option->optionString);
2609 return JNI_EINVAL;
2610 } else {
2611 if (FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf) != JVMFlag::SUCCESS) {
2612 return JNI_EINVAL;
2613 }
2614 }
2615 // Xminf
2616 } else if (match_option(option, "-Xminf", &tail)) {
2617 char* err;
2618 int minf = (int)(strtod(tail, &err) * 100);
2619 if (*err != '\0' || *tail == '\0') {
2620 jio_fprintf(defaultStream::error_stream(),
2621 "Bad min heap free percentage size: %s\n",
2622 option->optionString);
2623 return JNI_EINVAL;
2624 } else {
2625 if (FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf) != JVMFlag::SUCCESS) {
2626 return JNI_EINVAL;
2627 }
2628 }
2629 // -Xss
2630 } else if (match_option(option, "-Xss", &tail)) {
2631 intx value = 0;
2632 jint err = parse_xss(option, tail, &value);
2633 if (err != JNI_OK) {
2634 return err;
2635 }
2636 if (FLAG_SET_CMDLINE(intx, ThreadStackSize, value) != JVMFlag::SUCCESS) {
2637 return JNI_EINVAL;
2638 }
2639 } else if (match_option(option, "-Xmaxjitcodesize", &tail) ||
2640 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) {
2641 julong long_ReservedCodeCacheSize = 0;
2642
2643 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1);
2644 if (errcode != arg_in_range) {
2645 jio_fprintf(defaultStream::error_stream(),
2646 "Invalid maximum code cache size: %s.\n", option->optionString);
2647 return JNI_EINVAL;
2648 }
2649 if (FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != JVMFlag::SUCCESS) {
2650 return JNI_EINVAL;
2651 }
2652 // -green
2653 } else if (match_option(option, "-green")) {
2654 jio_fprintf(defaultStream::error_stream(),
2655 "Green threads support not available\n");
2656 return JNI_EINVAL;
2657 // -native
2658 } else if (match_option(option, "-native")) {
2659 // HotSpot always uses native threads, ignore silently for compatibility
2660 // -Xrs
2661 } else if (match_option(option, "-Xrs")) {
2662 // Classic/EVM option, new functionality
2663 if (FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true) != JVMFlag::SUCCESS) {
2664 return JNI_EINVAL;
2665 }
2666 // -Xprof
2667 } else if (match_option(option, "-Xprof")) {
2668 char version[256];
2669 // Obsolete in JDK 10
2670 JDK_Version::jdk(10).to_string(version, sizeof(version));
2671 warning("Ignoring option %s; support was removed in %s", option->optionString, version);
2672 // -Xconcurrentio
2673 } else if (match_option(option, "-Xconcurrentio")) {
2674 if (FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true) != JVMFlag::SUCCESS) {
2675 return JNI_EINVAL;
2676 }
2677 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != JVMFlag::SUCCESS) {
2678 return JNI_EINVAL;
2679 }
2680 SafepointSynchronize::set_defer_thr_suspend_loop_count();
2681 if (FLAG_SET_CMDLINE(bool, UseTLAB, false) != JVMFlag::SUCCESS) {
2682 return JNI_EINVAL;
2683 }
2684 if (FLAG_SET_CMDLINE(size_t, NewSizeThreadIncrease, 16 * K) != JVMFlag::SUCCESS) { // 20Kb per thread added to new generation
2685 return JNI_EINVAL;
2686 }
2687
2688 // -Xinternalversion
2689 } else if (match_option(option, "-Xinternalversion")) {
2690 jio_fprintf(defaultStream::output_stream(), "%s\n",
2691 VM_Version::internal_vm_info_string());
2692 vm_exit(0);
2693 #ifndef PRODUCT
2694 // -Xprintflags
2695 } else if (match_option(option, "-Xprintflags")) {
2696 JVMFlag::printFlags(tty, false);
2697 vm_exit(0);
2698 #endif
2699 // -D
2700 } else if (match_option(option, "-D", &tail)) {
2701 const char* value;
2702 if (match_option(option, "-Djava.endorsed.dirs=", &value) &&
2703 *value!= '\0' && strcmp(value, "\"\"") != 0) {
2704 // abort if -Djava.endorsed.dirs is set
2705 jio_fprintf(defaultStream::output_stream(),
2706 "-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n"
2707 "in modular form will be supported via the concept of upgradeable modules.\n", value);
2708 return JNI_EINVAL;
2709 }
2710 if (match_option(option, "-Djava.ext.dirs=", &value) &&
2711 *value != '\0' && strcmp(value, "\"\"") != 0) {
2712 // abort if -Djava.ext.dirs is set
2713 jio_fprintf(defaultStream::output_stream(),
2714 "-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value);
2715 return JNI_EINVAL;
2716 }
2717 // Check for module related properties. They must be set using the modules
2718 // options. For example: use "--add-modules=java.sql", not
2719 // "-Djdk.module.addmods=java.sql"
2720 if (is_internal_module_property(option->optionString + 2)) {
2721 needs_module_property_warning = true;
2722 continue;
2723 }
2724
2725 if (!add_property(tail)) {
2726 return JNI_ENOMEM;
2727 }
2728 // Out of the box management support
2729 if (match_option(option, "-Dcom.sun.management", &tail)) {
2730 #if INCLUDE_MANAGEMENT
2731 if (FLAG_SET_CMDLINE(bool, ManagementServer, true) != JVMFlag::SUCCESS) {
2732 return JNI_EINVAL;
2733 }
2734 // management agent in module jdk.management.agent
2735 if (!create_numbered_property("jdk.module.addmods", "jdk.management.agent", addmods_count++)) {
2736 return JNI_ENOMEM;
2737 }
2738 #else
2739 jio_fprintf(defaultStream::output_stream(),
2740 "-Dcom.sun.management is not supported in this VM.\n");
2741 return JNI_ERR;
2742 #endif
2743 }
2744 // -Xint
2745 } else if (match_option(option, "-Xint")) {
2746 set_mode_flags(_int);
2747 // -Xmixed
2748 } else if (match_option(option, "-Xmixed")) {
2749 set_mode_flags(_mixed);
2750 // -Xcomp
2751 } else if (match_option(option, "-Xcomp")) {
2752 // for testing the compiler; turn off all flags that inhibit compilation
2753 set_mode_flags(_comp);
2754 // -Xshare:dump
2755 } else if (match_option(option, "-Xshare:dump")) {
2756 if (FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true) != JVMFlag::SUCCESS) {
2757 return JNI_EINVAL;
2758 }
2759 set_mode_flags(_int); // Prevent compilation, which creates objects
2760 // -Xshare:on
2761 } else if (match_option(option, "-Xshare:on")) {
2762 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != JVMFlag::SUCCESS) {
2763 return JNI_EINVAL;
2764 }
2765 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != JVMFlag::SUCCESS) {
2766 return JNI_EINVAL;
2767 }
2768 // -Xshare:auto
2769 } else if (match_option(option, "-Xshare:auto")) {
2770 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != JVMFlag::SUCCESS) {
2771 return JNI_EINVAL;
2772 }
2773 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != JVMFlag::SUCCESS) {
2774 return JNI_EINVAL;
2775 }
2776 // -Xshare:off
2777 } else if (match_option(option, "-Xshare:off")) {
2778 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, false) != JVMFlag::SUCCESS) {
2779 return JNI_EINVAL;
2780 }
2781 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != JVMFlag::SUCCESS) {
2782 return JNI_EINVAL;
2783 }
2784 // -Xverify
2785 } else if (match_option(option, "-Xverify", &tail)) {
2786 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) {
2787 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true) != JVMFlag::SUCCESS) {
2788 return JNI_EINVAL;
2789 }
2790 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != JVMFlag::SUCCESS) {
2791 return JNI_EINVAL;
2792 }
2793 } else if (strcmp(tail, ":remote") == 0) {
2794 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != JVMFlag::SUCCESS) {
2795 return JNI_EINVAL;
2796 }
2797 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != JVMFlag::SUCCESS) {
2798 return JNI_EINVAL;
2799 }
2800 } else if (strcmp(tail, ":none") == 0) {
2801 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != JVMFlag::SUCCESS) {
2802 return JNI_EINVAL;
2803 }
2804 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false) != JVMFlag::SUCCESS) {
2805 return JNI_EINVAL;
2806 }
2807 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) {
2808 return JNI_EINVAL;
2809 }
2810 // -Xdebug
2811 } else if (match_option(option, "-Xdebug")) {
2812 // note this flag has been used, then ignore
2813 set_xdebug_mode(true);
2814 // -Xnoagent
2815 } else if (match_option(option, "-Xnoagent")) {
2816 // For compatibility with classic. HotSpot refuses to load the old style agent.dll.
2817 } else if (match_option(option, "-Xloggc:", &tail)) {
2818 // Deprecated flag to redirect GC output to a file. -Xloggc:<filename>
2819 log_warning(gc)("-Xloggc is deprecated. Will use -Xlog:gc:%s instead.", tail);
2820 _gc_log_filename = os::strdup_check_oom(tail);
2821 } else if (match_option(option, "-Xlog", &tail)) {
2822 bool ret = false;
2823 if (strcmp(tail, ":help") == 0) {
2824 fileStream stream(defaultStream::output_stream());
2825 LogConfiguration::print_command_line_help(&stream);
2826 vm_exit(0);
2827 } else if (strcmp(tail, ":disable") == 0) {
2828 LogConfiguration::disable_logging();
2829 ret = true;
2830 } else if (*tail == '\0') {
2831 ret = LogConfiguration::parse_command_line_arguments();
2832 assert(ret, "-Xlog without arguments should never fail to parse");
2833 } else if (*tail == ':') {
2834 ret = LogConfiguration::parse_command_line_arguments(tail + 1);
2835 }
2836 if (ret == false) {
2837 jio_fprintf(defaultStream::error_stream(),
2838 "Invalid -Xlog option '-Xlog%s', see error log for details.\n",
2839 tail);
2840 return JNI_EINVAL;
2841 }
2842 // JNI hooks
2843 } else if (match_option(option, "-Xcheck", &tail)) {
2844 if (!strcmp(tail, ":jni")) {
2845 #if !INCLUDE_JNI_CHECK
2846 warning("JNI CHECKING is not supported in this VM");
2847 #else
2848 CheckJNICalls = true;
2849 #endif // INCLUDE_JNI_CHECK
2850 } else if (is_bad_option(option, args->ignoreUnrecognized,
2851 "check")) {
2852 return JNI_EINVAL;
2853 }
2854 } else if (match_option(option, "vfprintf")) {
2855 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo);
2856 } else if (match_option(option, "exit")) {
2857 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo);
2858 } else if (match_option(option, "abort")) {
2859 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo);
2860 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure;
2861 // and the last option wins.
2862 } else if (match_option(option, "-XX:+NeverTenure")) {
2863 if (FLAG_SET_CMDLINE(bool, NeverTenure, true) != JVMFlag::SUCCESS) {
2864 return JNI_EINVAL;
2865 }
2866 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != JVMFlag::SUCCESS) {
2867 return JNI_EINVAL;
2868 }
2869 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1) != JVMFlag::SUCCESS) {
2870 return JNI_EINVAL;
2871 }
2872 } else if (match_option(option, "-XX:+AlwaysTenure")) {
2873 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != JVMFlag::SUCCESS) {
2874 return JNI_EINVAL;
2875 }
2876 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != JVMFlag::SUCCESS) {
2877 return JNI_EINVAL;
2878 }
2879 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0) != JVMFlag::SUCCESS) {
2880 return JNI_EINVAL;
2881 }
2882 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) {
2883 uintx max_tenuring_thresh = 0;
2884 if (!parse_uintx(tail, &max_tenuring_thresh, 0)) {
2885 jio_fprintf(defaultStream::error_stream(),
2886 "Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail);
2887 return JNI_EINVAL;
2888 }
2889
2890 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh) != JVMFlag::SUCCESS) {
2891 return JNI_EINVAL;
2892 }
2893
2894 if (MaxTenuringThreshold == 0) {
2895 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != JVMFlag::SUCCESS) {
2896 return JNI_EINVAL;
2897 }
2898 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != JVMFlag::SUCCESS) {
2899 return JNI_EINVAL;
2900 }
2901 } else {
2902 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != JVMFlag::SUCCESS) {
2903 return JNI_EINVAL;
2904 }
2905 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != JVMFlag::SUCCESS) {
2906 return JNI_EINVAL;
2907 }
2908 }
2909 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) {
2910 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false) != JVMFlag::SUCCESS) {
2911 return JNI_EINVAL;
2912 }
2913 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true) != JVMFlag::SUCCESS) {
2914 return JNI_EINVAL;
2915 }
2916 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) {
2917 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false) != JVMFlag::SUCCESS) {
2918 return JNI_EINVAL;
2919 }
2920 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true) != JVMFlag::SUCCESS) {
2921 return JNI_EINVAL;
2922 }
2923 } else if (match_option(option, "-XX:+ExtendedDTraceProbes")) {
2924 #if defined(DTRACE_ENABLED)
2925 if (FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true) != JVMFlag::SUCCESS) {
2926 return JNI_EINVAL;
2927 }
2928 if (FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true) != JVMFlag::SUCCESS) {
2929 return JNI_EINVAL;
2930 }
2931 if (FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true) != JVMFlag::SUCCESS) {
2932 return JNI_EINVAL;
2933 }
2934 if (FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true) != JVMFlag::SUCCESS) {
2935 return JNI_EINVAL;
2936 }
2937 #else // defined(DTRACE_ENABLED)
2938 jio_fprintf(defaultStream::error_stream(),
2939 "ExtendedDTraceProbes flag is not applicable for this configuration\n");
2940 return JNI_EINVAL;
2941 #endif // defined(DTRACE_ENABLED)
2942 #ifdef ASSERT
2943 } else if (match_option(option, "-XX:+FullGCALot")) {
2944 if (FLAG_SET_CMDLINE(bool, FullGCALot, true) != JVMFlag::SUCCESS) {
2945 return JNI_EINVAL;
2946 }
2947 // disable scavenge before parallel mark-compact
2948 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != JVMFlag::SUCCESS) {
2949 return JNI_EINVAL;
2950 }
2951 #endif
2952 #if !INCLUDE_MANAGEMENT
2953 } else if (match_option(option, "-XX:+ManagementServer")) {
2954 jio_fprintf(defaultStream::error_stream(),
2955 "ManagementServer is not supported in this VM.\n");
2956 return JNI_ERR;
2957 #endif // INCLUDE_MANAGEMENT
2958 #if INCLUDE_JFR
2959 } else if (match_jfr_option(&option)) {
2960 return JNI_EINVAL;
2961 #endif
2962 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx
2963 // Skip -XX:Flags= and -XX:VMOptionsFile= since those cases have
2964 // already been handled
2965 if ((strncmp(tail, "Flags=", strlen("Flags=")) != 0) &&
2966 (strncmp(tail, "VMOptionsFile=", strlen("VMOptionsFile=")) != 0)) {
2967 if (!process_argument(tail, args->ignoreUnrecognized, origin)) {
2968 return JNI_EINVAL;
2969 }
2970 }
2971 // Unknown option
2972 } else if (is_bad_option(option, args->ignoreUnrecognized)) {
2973 return JNI_ERR;
2974 }
2975 }
2976
2977 // PrintSharedArchiveAndExit will turn on
2978 // -Xshare:on
2979 // -Xlog:class+path=info
2980 if (PrintSharedArchiveAndExit) {
2981 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != JVMFlag::SUCCESS) {
2982 return JNI_EINVAL;
2983 }
2984 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != JVMFlag::SUCCESS) {
2985 return JNI_EINVAL;
2986 }
2987 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, path));
2988 }
2989
2990 // Change the default value for flags which have different default values
2991 // when working with older JDKs.
2992 #ifdef LINUX
2993 if (JDK_Version::current().compare_major(6) <= 0 &&
2994 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) {
2995 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false);
2996 }
2997 #endif // LINUX
2998 fix_appclasspath();
2999 return JNI_OK;
3000 }
3001
3002 void Arguments::add_patch_mod_prefix(const char* module_name, const char* path, bool* patch_mod_javabase) {
3003 // For java.base check for duplicate --patch-module options being specified on the command line.
3004 // This check is only required for java.base, all other duplicate module specifications
3005 // will be checked during module system initialization. The module system initialization
3006 // will throw an ExceptionInInitializerError if this situation occurs.
3007 if (strcmp(module_name, JAVA_BASE_NAME) == 0) {
3008 if (*patch_mod_javabase) {
3009 vm_exit_during_initialization("Cannot specify " JAVA_BASE_NAME " more than once to --patch-module");
3010 } else {
3011 *patch_mod_javabase = true;
3012 }
3013 }
3014
3015 // Create GrowableArray lazily, only if --patch-module has been specified
3016 if (_patch_mod_prefix == NULL) {
3017 _patch_mod_prefix = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<ModulePatchPath*>(10, true);
3018 }
3019
3020 _patch_mod_prefix->push(new ModulePatchPath(module_name, path));
3021 }
3022
3023 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled)
3024 //
3025 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar
3026 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar".
3027 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty
3028 // path is treated as the current directory.
3029 //
3030 // This causes problems with CDS, which requires that all directories specified in the classpath
3031 // must be empty. In most cases, applications do NOT want to load classes from the current
3032 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up
3033 // scripts compatible with CDS.
3034 void Arguments::fix_appclasspath() {
3035 if (IgnoreEmptyClassPaths) {
3036 const char separator = *os::path_separator();
3037 const char* src = _java_class_path->value();
3038
3039 // skip over all the leading empty paths
3040 while (*src == separator) {
3041 src ++;
3042 }
3043
3044 char* copy = os::strdup_check_oom(src, mtArguments);
3045
3046 // trim all trailing empty paths
3047 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) {
3048 *tail = '\0';
3049 }
3050
3051 char from[3] = {separator, separator, '\0'};
3052 char to [2] = {separator, '\0'};
3053 while (StringUtils::replace_no_expand(copy, from, to) > 0) {
3054 // Keep replacing "::" -> ":" until we have no more "::" (non-windows)
3055 // Keep replacing ";;" -> ";" until we have no more ";;" (windows)
3056 }
3057
3058 _java_class_path->set_writeable_value(copy);
3059 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore
3060 }
3061 }
3062
3063 jint Arguments::finalize_vm_init_args(bool patch_mod_javabase) {
3064 // check if the default lib/endorsed directory exists; if so, error
3065 char path[JVM_MAXPATHLEN];
3066 const char* fileSep = os::file_separator();
3067 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep);
3068
3069 DIR* dir = os::opendir(path);
3070 if (dir != NULL) {
3071 jio_fprintf(defaultStream::output_stream(),
3072 "<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n"
3073 "in modular form will be supported via the concept of upgradeable modules.\n");
3074 os::closedir(dir);
3075 return JNI_ERR;
3076 }
3077
3078 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep);
3079 dir = os::opendir(path);
3080 if (dir != NULL) {
3081 jio_fprintf(defaultStream::output_stream(),
3082 "<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; "
3083 "Use -classpath instead.\n.");
3084 os::closedir(dir);
3085 return JNI_ERR;
3086 }
3087
3088 // This must be done after all arguments have been processed
3089 // and the container support has been initialized since AggressiveHeap
3090 // relies on the amount of total memory available.
3091 if (AggressiveHeap) {
3092 jint result = set_aggressive_heap_flags();
3093 if (result != JNI_OK) {
3094 return result;
3095 }
3096 }
3097
3098 // This must be done after all arguments have been processed.
3099 // java_compiler() true means set to "NONE" or empty.
3100 if (java_compiler() && !xdebug_mode()) {
3101 // For backwards compatibility, we switch to interpreted mode if
3102 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was
3103 // not specified.
3104 set_mode_flags(_int);
3105 }
3106
3107 // CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode),
3108 // but like -Xint, leave compilation thresholds unaffected.
3109 // With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well.
3110 if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) {
3111 set_mode_flags(_int);
3112 }
3113
3114 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set
3115 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) {
3116 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold);
3117 }
3118
3119 #if !COMPILER2_OR_JVMCI
3120 // Don't degrade server performance for footprint
3121 if (FLAG_IS_DEFAULT(UseLargePages) &&
3122 MaxHeapSize < LargePageHeapSizeThreshold) {
3123 // No need for large granularity pages w/small heaps.
3124 // Note that large pages are enabled/disabled for both the
3125 // Java heap and the code cache.
3126 FLAG_SET_DEFAULT(UseLargePages, false);
3127 }
3128
3129 UNSUPPORTED_OPTION(ProfileInterpreter);
3130 NOT_PRODUCT(UNSUPPORTED_OPTION(TraceProfileInterpreter));
3131 #endif
3132
3133 #ifndef TIERED
3134 // Tiered compilation is undefined.
3135 UNSUPPORTED_OPTION(TieredCompilation);
3136 #endif
3137
3138 if (!check_vm_args_consistency()) {
3139 return JNI_ERR;
3140 }
3141
3142 #if INCLUDE_CDS
3143 if (DumpSharedSpaces) {
3144 // Disable biased locking now as it interferes with the clean up of
3145 // the archived Klasses and Java string objects (at dump time only).
3146 UseBiasedLocking = false;
3147
3148 // Always verify non-system classes during CDS dump
3149 if (!BytecodeVerificationRemote) {
3150 BytecodeVerificationRemote = true;
3151 log_info(cds)("All non-system classes will be verified (-Xverify:remote) during CDS dump time.");
3152 }
3153 }
3154 if (UseSharedSpaces && patch_mod_javabase) {
3155 no_shared_spaces("CDS is disabled when " JAVA_BASE_NAME " module is patched.");
3156 }
3157 if (UseSharedSpaces && !DumpSharedSpaces && check_unsupported_cds_runtime_properties()) {
3158 FLAG_SET_DEFAULT(UseSharedSpaces, false);
3159 }
3160 #endif
3161
3162 #ifndef CAN_SHOW_REGISTERS_ON_ASSERT
3163 UNSUPPORTED_OPTION(ShowRegistersOnAssert);
3164 #endif // CAN_SHOW_REGISTERS_ON_ASSERT
3165
3166 return JNI_OK;
3167 }
3168
3169 // Helper class for controlling the lifetime of JavaVMInitArgs
3170 // objects. The contents of the JavaVMInitArgs are guaranteed to be
3171 // deleted on the destruction of the ScopedVMInitArgs object.
3172 class ScopedVMInitArgs : public StackObj {
3173 private:
3174 JavaVMInitArgs _args;
3175 char* _container_name;
3176 bool _is_set;
3177 char* _vm_options_file_arg;
3178
3179 public:
3180 ScopedVMInitArgs(const char *container_name) {
3181 _args.version = JNI_VERSION_1_2;
3182 _args.nOptions = 0;
3183 _args.options = NULL;
3184 _args.ignoreUnrecognized = false;
3185 _container_name = (char *)container_name;
3186 _is_set = false;
3187 _vm_options_file_arg = NULL;
3188 }
3189
3190 // Populates the JavaVMInitArgs object represented by this
3191 // ScopedVMInitArgs object with the arguments in options. The
3192 // allocated memory is deleted by the destructor. If this method
3193 // returns anything other than JNI_OK, then this object is in a
3194 // partially constructed state, and should be abandoned.
3195 jint set_args(GrowableArray<JavaVMOption>* options) {
3196 _is_set = true;
3197 JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL(
3198 JavaVMOption, options->length(), mtArguments);
3199 if (options_arr == NULL) {
3200 return JNI_ENOMEM;
3201 }
3202 _args.options = options_arr;
3203
3204 for (int i = 0; i < options->length(); i++) {
3205 options_arr[i] = options->at(i);
3206 options_arr[i].optionString = os::strdup(options_arr[i].optionString);
3207 if (options_arr[i].optionString == NULL) {
3208 // Rely on the destructor to do cleanup.
3209 _args.nOptions = i;
3210 return JNI_ENOMEM;
3211 }
3212 }
3213
3214 _args.nOptions = options->length();
3215 _args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions;
3216 return JNI_OK;
3217 }
3218
3219 JavaVMInitArgs* get() { return &_args; }
3220 char* container_name() { return _container_name; }
3221 bool is_set() { return _is_set; }
3222 bool found_vm_options_file_arg() { return _vm_options_file_arg != NULL; }
3223 char* vm_options_file_arg() { return _vm_options_file_arg; }
3224
3225 void set_vm_options_file_arg(const char *vm_options_file_arg) {
3226 if (_vm_options_file_arg != NULL) {
3227 os::free(_vm_options_file_arg);
3228 }
3229 _vm_options_file_arg = os::strdup_check_oom(vm_options_file_arg);
3230 }
3231
3232 ~ScopedVMInitArgs() {
3233 if (_vm_options_file_arg != NULL) {
3234 os::free(_vm_options_file_arg);
3235 }
3236 if (_args.options == NULL) return;
3237 for (int i = 0; i < _args.nOptions; i++) {
3238 os::free(_args.options[i].optionString);
3239 }
3240 FREE_C_HEAP_ARRAY(JavaVMOption, _args.options);
3241 }
3242
3243 // Insert options into this option list, to replace option at
3244 // vm_options_file_pos (-XX:VMOptionsFile)
3245 jint insert(const JavaVMInitArgs* args,
3246 const JavaVMInitArgs* args_to_insert,
3247 const int vm_options_file_pos) {
3248 assert(_args.options == NULL, "shouldn't be set yet");
3249 assert(args_to_insert->nOptions != 0, "there should be args to insert");
3250 assert(vm_options_file_pos != -1, "vm_options_file_pos should be set");
3251
3252 int length = args->nOptions + args_to_insert->nOptions - 1;
3253 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments)
3254 GrowableArray<JavaVMOption>(length, true); // Construct new option array
3255 for (int i = 0; i < args->nOptions; i++) {
3256 if (i == vm_options_file_pos) {
3257 // insert the new options starting at the same place as the
3258 // -XX:VMOptionsFile option
3259 for (int j = 0; j < args_to_insert->nOptions; j++) {
3260 options->push(args_to_insert->options[j]);
3261 }
3262 } else {
3263 options->push(args->options[i]);
3264 }
3265 }
3266 // make into options array
3267 jint result = set_args(options);
3268 delete options;
3269 return result;
3270 }
3271 };
3272
3273 jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) {
3274 return parse_options_environment_variable("_JAVA_OPTIONS", args);
3275 }
3276
3277 jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) {
3278 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args);
3279 }
3280
3281 jint Arguments::parse_options_environment_variable(const char* name,
3282 ScopedVMInitArgs* vm_args) {
3283 char *buffer = ::getenv(name);
3284
3285 // Don't check this environment variable if user has special privileges
3286 // (e.g. unix su command).
3287 if (buffer == NULL || os::have_special_privileges()) {
3288 return JNI_OK;
3289 }
3290
3291 if ((buffer = os::strdup(buffer)) == NULL) {
3292 return JNI_ENOMEM;
3293 }
3294
3295 jio_fprintf(defaultStream::error_stream(),
3296 "Picked up %s: %s\n", name, buffer);
3297
3298 int retcode = parse_options_buffer(name, buffer, strlen(buffer), vm_args);
3299
3300 os::free(buffer);
3301 return retcode;
3302 }
3303
3304 jint Arguments::parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args) {
3305 // read file into buffer
3306 int fd = ::open(file_name, O_RDONLY);
3307 if (fd < 0) {
3308 jio_fprintf(defaultStream::error_stream(),
3309 "Could not open options file '%s'\n",
3310 file_name);
3311 return JNI_ERR;
3312 }
3313
3314 struct stat stbuf;
3315 int retcode = os::stat(file_name, &stbuf);
3316 if (retcode != 0) {
3317 jio_fprintf(defaultStream::error_stream(),
3318 "Could not stat options file '%s'\n",
3319 file_name);
3320 os::close(fd);
3321 return JNI_ERR;
3322 }
3323
3324 if (stbuf.st_size == 0) {
3325 // tell caller there is no option data and that is ok
3326 os::close(fd);
3327 return JNI_OK;
3328 }
3329
3330 // '+ 1' for NULL termination even with max bytes
3331 size_t bytes_alloc = stbuf.st_size + 1;
3332
3333 char *buf = NEW_C_HEAP_ARRAY_RETURN_NULL(char, bytes_alloc, mtArguments);
3334 if (NULL == buf) {
3335 jio_fprintf(defaultStream::error_stream(),
3336 "Could not allocate read buffer for options file parse\n");
3337 os::close(fd);
3338 return JNI_ENOMEM;
3339 }
3340
3341 memset(buf, 0, bytes_alloc);
3342
3343 // Fill buffer
3344 // Use ::read() instead of os::read because os::read()
3345 // might do a thread state transition
3346 // and it is too early for that here
3347
3348 ssize_t bytes_read = ::read(fd, (void *)buf, (unsigned)bytes_alloc);
3349 os::close(fd);
3350 if (bytes_read < 0) {
3351 FREE_C_HEAP_ARRAY(char, buf);
3352 jio_fprintf(defaultStream::error_stream(),
3353 "Could not read options file '%s'\n", file_name);
3354 return JNI_ERR;
3355 }
3356
3357 if (bytes_read == 0) {
3358 // tell caller there is no option data and that is ok
3359 FREE_C_HEAP_ARRAY(char, buf);
3360 return JNI_OK;
3361 }
3362
3363 retcode = parse_options_buffer(file_name, buf, bytes_read, vm_args);
3364
3365 FREE_C_HEAP_ARRAY(char, buf);
3366 return retcode;
3367 }
3368
3369 jint Arguments::parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args) {
3370 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<JavaVMOption>(2, true); // Construct option array
3371
3372 // some pointers to help with parsing
3373 char *buffer_end = buffer + buf_len;
3374 char *opt_hd = buffer;
3375 char *wrt = buffer;
3376 char *rd = buffer;
3377
3378 // parse all options
3379 while (rd < buffer_end) {
3380 // skip leading white space from the input string
3381 while (rd < buffer_end && isspace(*rd)) {
3382 rd++;
3383 }
3384
3385 if (rd >= buffer_end) {
3386 break;
3387 }
3388
3389 // Remember this is where we found the head of the token.
3390 opt_hd = wrt;
3391
3392 // Tokens are strings of non white space characters separated
3393 // by one or more white spaces.
3394 while (rd < buffer_end && !isspace(*rd)) {
3395 if (*rd == '\'' || *rd == '"') { // handle a quoted string
3396 int quote = *rd; // matching quote to look for
3397 rd++; // don't copy open quote
3398 while (rd < buffer_end && *rd != quote) {
3399 // include everything (even spaces)
3400 // up until the close quote
3401 *wrt++ = *rd++; // copy to option string
3402 }
3403
3404 if (rd < buffer_end) {
3405 rd++; // don't copy close quote
3406 } else {
3407 // did not see closing quote
3408 jio_fprintf(defaultStream::error_stream(),
3409 "Unmatched quote in %s\n", name);
3410 delete options;
3411 return JNI_ERR;
3412 }
3413 } else {
3414 *wrt++ = *rd++; // copy to option string
3415 }
3416 }
3417
3418 // steal a white space character and set it to NULL
3419 *wrt++ = '\0';
3420 // We now have a complete token
3421
3422 JavaVMOption option;
3423 option.optionString = opt_hd;
3424 option.extraInfo = NULL;
3425
3426 options->append(option); // Fill in option
3427
3428 rd++; // Advance to next character
3429 }
3430
3431 // Fill out JavaVMInitArgs structure.
3432 jint status = vm_args->set_args(options);
3433
3434 delete options;
3435 return status;
3436 }
3437
3438 void Arguments::set_shared_spaces_flags() {
3439 if (DumpSharedSpaces) {
3440 if (FailOverToOldVerifier) {
3441 // Don't fall back to the old verifier on verification failure. If a
3442 // class fails verification with the split verifier, it might fail the
3443 // CDS runtime verifier constraint check. In that case, we don't want
3444 // to share the class. We only archive classes that pass the split verifier.
3445 FLAG_SET_DEFAULT(FailOverToOldVerifier, false);
3446 }
3447
3448 if (RequireSharedSpaces) {
3449 warning("Cannot dump shared archive while using shared archive");
3450 }
3451 UseSharedSpaces = false;
3452 #ifdef _LP64
3453 if (!UseCompressedOops || !UseCompressedClassPointers) {
3454 vm_exit_during_initialization(
3455 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL);
3456 }
3457 } else {
3458 if (!UseCompressedOops || !UseCompressedClassPointers) {
3459 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces.");
3460 }
3461 #endif
3462 }
3463 }
3464
3465 // Sharing support
3466 // Construct the path to the archive
3467 static char* get_shared_archive_path() {
3468 char *shared_archive_path;
3469 if (SharedArchiveFile == NULL) {
3470 char jvm_path[JVM_MAXPATHLEN];
3471 os::jvm_path(jvm_path, sizeof(jvm_path));
3472 char *end = strrchr(jvm_path, *os::file_separator());
3473 if (end != NULL) *end = '\0';
3474 size_t jvm_path_len = strlen(jvm_path);
3475 size_t file_sep_len = strlen(os::file_separator());
3476 const size_t len = jvm_path_len + file_sep_len + 20;
3477 shared_archive_path = NEW_C_HEAP_ARRAY(char, len, mtArguments);
3478 if (shared_archive_path != NULL) {
3479 jio_snprintf(shared_archive_path, len, "%s%sclasses.jsa",
3480 jvm_path, os::file_separator());
3481 }
3482 } else {
3483 shared_archive_path = os::strdup_check_oom(SharedArchiveFile, mtArguments);
3484 }
3485 return shared_archive_path;
3486 }
3487
3488 #ifndef PRODUCT
3489 // Determine whether LogVMOutput should be implicitly turned on.
3490 static bool use_vm_log() {
3491 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) ||
3492 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods ||
3493 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers ||
3494 PrintAssembly || TraceDeoptimization || TraceDependencies ||
3495 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) {
3496 return true;
3497 }
3498
3499 #ifdef COMPILER1
3500 if (PrintC1Statistics) {
3501 return true;
3502 }
3503 #endif // COMPILER1
3504
3505 #ifdef COMPILER2
3506 if (PrintOptoAssembly || PrintOptoStatistics) {
3507 return true;
3508 }
3509 #endif // COMPILER2
3510
3511 return false;
3512 }
3513
3514 #endif // PRODUCT
3515
3516 bool Arguments::args_contains_vm_options_file_arg(const JavaVMInitArgs* args) {
3517 for (int index = 0; index < args->nOptions; index++) {
3518 const JavaVMOption* option = args->options + index;
3519 const char* tail;
3520 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
3521 return true;
3522 }
3523 }
3524 return false;
3525 }
3526
3527 jint Arguments::insert_vm_options_file(const JavaVMInitArgs* args,
3528 const char* vm_options_file,
3529 const int vm_options_file_pos,
3530 ScopedVMInitArgs* vm_options_file_args,
3531 ScopedVMInitArgs* args_out) {
3532 jint code = parse_vm_options_file(vm_options_file, vm_options_file_args);
3533 if (code != JNI_OK) {
3534 return code;
3535 }
3536
3537 if (vm_options_file_args->get()->nOptions < 1) {
3538 return JNI_OK;
3539 }
3540
3541 if (args_contains_vm_options_file_arg(vm_options_file_args->get())) {
3542 jio_fprintf(defaultStream::error_stream(),
3543 "A VM options file may not refer to a VM options file. "
3544 "Specification of '-XX:VMOptionsFile=<file-name>' in the "
3545 "options file '%s' in options container '%s' is an error.\n",
3546 vm_options_file_args->vm_options_file_arg(),
3547 vm_options_file_args->container_name());
3548 return JNI_EINVAL;
3549 }
3550
3551 return args_out->insert(args, vm_options_file_args->get(),
3552 vm_options_file_pos);
3553 }
3554
3555 // Expand -XX:VMOptionsFile found in args_in as needed.
3556 // mod_args and args_out parameters may return values as needed.
3557 jint Arguments::expand_vm_options_as_needed(const JavaVMInitArgs* args_in,
3558 ScopedVMInitArgs* mod_args,
3559 JavaVMInitArgs** args_out) {
3560 jint code = match_special_option_and_act(args_in, mod_args);
3561 if (code != JNI_OK) {
3562 return code;
3563 }
3564
3565 if (mod_args->is_set()) {
3566 // args_in contains -XX:VMOptionsFile and mod_args contains the
3567 // original options from args_in along with the options expanded
3568 // from the VMOptionsFile. Return a short-hand to the caller.
3569 *args_out = mod_args->get();
3570 } else {
3571 *args_out = (JavaVMInitArgs *)args_in; // no changes so use args_in
3572 }
3573 return JNI_OK;
3574 }
3575
3576 jint Arguments::match_special_option_and_act(const JavaVMInitArgs* args,
3577 ScopedVMInitArgs* args_out) {
3578 // Remaining part of option string
3579 const char* tail;
3580 ScopedVMInitArgs vm_options_file_args(args_out->container_name());
3581
3582 for (int index = 0; index < args->nOptions; index++) {
3583 const JavaVMOption* option = args->options + index;
3584 if (ArgumentsExt::process_options(option)) {
3585 continue;
3586 }
3587 if (match_option(option, "-XX:Flags=", &tail)) {
3588 Arguments::set_jvm_flags_file(tail);
3589 continue;
3590 }
3591 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
3592 if (vm_options_file_args.found_vm_options_file_arg()) {
3593 jio_fprintf(defaultStream::error_stream(),
3594 "The option '%s' is already specified in the options "
3595 "container '%s' so the specification of '%s' in the "
3596 "same options container is an error.\n",
3597 vm_options_file_args.vm_options_file_arg(),
3598 vm_options_file_args.container_name(),
3599 option->optionString);
3600 return JNI_EINVAL;
3601 }
3602 vm_options_file_args.set_vm_options_file_arg(option->optionString);
3603 // If there's a VMOptionsFile, parse that
3604 jint code = insert_vm_options_file(args, tail, index,
3605 &vm_options_file_args, args_out);
3606 if (code != JNI_OK) {
3607 return code;
3608 }
3609 args_out->set_vm_options_file_arg(vm_options_file_args.vm_options_file_arg());
3610 if (args_out->is_set()) {
3611 // The VMOptions file inserted some options so switch 'args'
3612 // to the new set of options, and continue processing which
3613 // preserves "last option wins" semantics.
3614 args = args_out->get();
3615 // The first option from the VMOptionsFile replaces the
3616 // current option. So we back track to process the
3617 // replacement option.
3618 index--;
3619 }
3620 continue;
3621 }
3622 if (match_option(option, "-XX:+PrintVMOptions")) {
3623 PrintVMOptions = true;
3624 continue;
3625 }
3626 if (match_option(option, "-XX:-PrintVMOptions")) {
3627 PrintVMOptions = false;
3628 continue;
3629 }
3630 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) {
3631 IgnoreUnrecognizedVMOptions = true;
3632 continue;
3633 }
3634 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) {
3635 IgnoreUnrecognizedVMOptions = false;
3636 continue;
3637 }
3638 if (match_option(option, "-XX:+PrintFlagsInitial")) {
3639 JVMFlag::printFlags(tty, false);
3640 vm_exit(0);
3641 }
3642 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) {
3643 #if INCLUDE_NMT
3644 // The launcher did not setup nmt environment variable properly.
3645 if (!MemTracker::check_launcher_nmt_support(tail)) {
3646 warning("Native Memory Tracking did not setup properly, using wrong launcher?");
3647 }
3648
3649 // Verify if nmt option is valid.
3650 if (MemTracker::verify_nmt_option()) {
3651 // Late initialization, still in single-threaded mode.
3652 if (MemTracker::tracking_level() >= NMT_summary) {
3653 MemTracker::init();
3654 }
3655 } else {
3656 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL);
3657 }
3658 continue;
3659 #else
3660 jio_fprintf(defaultStream::error_stream(),
3661 "Native Memory Tracking is not supported in this VM\n");
3662 return JNI_ERR;
3663 #endif
3664 }
3665
3666 #ifndef PRODUCT
3667 if (match_option(option, "-XX:+PrintFlagsWithComments")) {
3668 JVMFlag::printFlags(tty, true);
3669 vm_exit(0);
3670 }
3671 #endif
3672 }
3673 return JNI_OK;
3674 }
3675
3676 static void print_options(const JavaVMInitArgs *args) {
3677 const char* tail;
3678 for (int index = 0; index < args->nOptions; index++) {
3679 const JavaVMOption *option = args->options + index;
3680 if (match_option(option, "-XX:", &tail)) {
3681 logOption(tail);
3682 }
3683 }
3684 }
3685
3686 bool Arguments::handle_deprecated_print_gc_flags() {
3687 if (PrintGC) {
3688 log_warning(gc)("-XX:+PrintGC is deprecated. Will use -Xlog:gc instead.");
3689 }
3690 if (PrintGCDetails) {
3691 log_warning(gc)("-XX:+PrintGCDetails is deprecated. Will use -Xlog:gc* instead.");
3692 }
3693
3694 if (_gc_log_filename != NULL) {
3695 // -Xloggc was used to specify a filename
3696 const char* gc_conf = PrintGCDetails ? "gc*" : "gc";
3697
3698 LogTarget(Error, logging) target;
3699 LogStream errstream(target);
3700 return LogConfiguration::parse_log_arguments(_gc_log_filename, gc_conf, NULL, NULL, &errstream);
3701 } else if (PrintGC || PrintGCDetails) {
3702 LogConfiguration::configure_stdout(LogLevel::Info, !PrintGCDetails, LOG_TAGS(gc));
3703 }
3704 return true;
3705 }
3706
3707 void Arguments::handle_extra_cms_flags(const char* msg) {
3708 SpecialFlag flag;
3709 const char *flag_name = "UseConcMarkSweepGC";
3710 if (lookup_special_flag(flag_name, flag)) {
3711 handle_aliases_and_deprecation(flag_name, /* print warning */ true);
3712 warning("%s", msg);
3713 }
3714 }
3715
3716 // Parse entry point called from JNI_CreateJavaVM
3717
3718 jint Arguments::parse(const JavaVMInitArgs* initial_cmd_args) {
3719 assert(verify_special_jvm_flags(), "deprecated and obsolete flag table inconsistent");
3720
3721 // Initialize ranges, constraints and writeables
3722 JVMFlagRangeList::init();
3723 JVMFlagConstraintList::init();
3724 JVMFlagWriteableList::init();
3725
3726 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed.
3727 const char* hotspotrc = ".hotspotrc";
3728 bool settings_file_specified = false;
3729 bool needs_hotspotrc_warning = false;
3730 ScopedVMInitArgs initial_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
3731 ScopedVMInitArgs initial_java_options_args("env_var='_JAVA_OPTIONS'");
3732
3733 // Pointers to current working set of containers
3734 JavaVMInitArgs* cur_cmd_args;
3735 JavaVMInitArgs* cur_java_options_args;
3736 JavaVMInitArgs* cur_java_tool_options_args;
3737
3738 // Containers for modified/expanded options
3739 ScopedVMInitArgs mod_cmd_args("cmd_line_args");
3740 ScopedVMInitArgs mod_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
3741 ScopedVMInitArgs mod_java_options_args("env_var='_JAVA_OPTIONS'");
3742
3743
3744 jint code =
3745 parse_java_tool_options_environment_variable(&initial_java_tool_options_args);
3746 if (code != JNI_OK) {
3747 return code;
3748 }
3749
3750 code = parse_java_options_environment_variable(&initial_java_options_args);
3751 if (code != JNI_OK) {
3752 return code;
3753 }
3754
3755 code = expand_vm_options_as_needed(initial_java_tool_options_args.get(),
3756 &mod_java_tool_options_args,
3757 &cur_java_tool_options_args);
3758 if (code != JNI_OK) {
3759 return code;
3760 }
3761
3762 code = expand_vm_options_as_needed(initial_cmd_args,
3763 &mod_cmd_args,
3764 &cur_cmd_args);
3765 if (code != JNI_OK) {
3766 return code;
3767 }
3768
3769 code = expand_vm_options_as_needed(initial_java_options_args.get(),
3770 &mod_java_options_args,
3771 &cur_java_options_args);
3772 if (code != JNI_OK) {
3773 return code;
3774 }
3775
3776 const char* flags_file = Arguments::get_jvm_flags_file();
3777 settings_file_specified = (flags_file != NULL);
3778
3779 if (IgnoreUnrecognizedVMOptions) {
3780 cur_cmd_args->ignoreUnrecognized = true;
3781 cur_java_tool_options_args->ignoreUnrecognized = true;
3782 cur_java_options_args->ignoreUnrecognized = true;
3783 }
3784
3785 // Parse specified settings file
3786 if (settings_file_specified) {
3787 if (!process_settings_file(flags_file, true,
3788 cur_cmd_args->ignoreUnrecognized)) {
3789 return JNI_EINVAL;
3790 }
3791 } else {
3792 #ifdef ASSERT
3793 // Parse default .hotspotrc settings file
3794 if (!process_settings_file(".hotspotrc", false,
3795 cur_cmd_args->ignoreUnrecognized)) {
3796 return JNI_EINVAL;
3797 }
3798 #else
3799 struct stat buf;
3800 if (os::stat(hotspotrc, &buf) == 0) {
3801 needs_hotspotrc_warning = true;
3802 }
3803 #endif
3804 }
3805
3806 if (PrintVMOptions) {
3807 print_options(cur_java_tool_options_args);
3808 print_options(cur_cmd_args);
3809 print_options(cur_java_options_args);
3810 }
3811
3812 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS
3813 jint result = parse_vm_init_args(cur_java_tool_options_args,
3814 cur_java_options_args,
3815 cur_cmd_args);
3816
3817 if (result != JNI_OK) {
3818 return result;
3819 }
3820
3821 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed.
3822 SharedArchivePath = get_shared_archive_path();
3823 if (SharedArchivePath == NULL) {
3824 return JNI_ENOMEM;
3825 }
3826
3827 // Set up VerifySharedSpaces
3828 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) {
3829 VerifySharedSpaces = true;
3830 }
3831
3832 // Delay warning until here so that we've had a chance to process
3833 // the -XX:-PrintWarnings flag
3834 if (needs_hotspotrc_warning) {
3835 warning("%s file is present but has been ignored. "
3836 "Run with -XX:Flags=%s to load the file.",
3837 hotspotrc, hotspotrc);
3838 }
3839
3840 if (needs_module_property_warning) {
3841 warning("Ignoring system property options whose names match the '-Djdk.module.*'."
3842 " names that are reserved for internal use.");
3843 }
3844
3845 #if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
3846 UNSUPPORTED_OPTION(UseLargePages);
3847 #endif
3848
3849 ArgumentsExt::report_unsupported_options();
3850
3851 #ifndef PRODUCT
3852 if (TraceBytecodesAt != 0) {
3853 TraceBytecodes = true;
3854 }
3855 if (CountCompiledCalls) {
3856 if (UseCounterDecay) {
3857 warning("UseCounterDecay disabled because CountCalls is set");
3858 UseCounterDecay = false;
3859 }
3860 }
3861 #endif // PRODUCT
3862
3863 if (ScavengeRootsInCode == 0) {
3864 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) {
3865 warning("Forcing ScavengeRootsInCode non-zero");
3866 }
3867 ScavengeRootsInCode = 1;
3868 }
3869
3870 if (!handle_deprecated_print_gc_flags()) {
3871 return JNI_EINVAL;
3872 }
3873
3874 // Set object alignment values.
3875 set_object_alignment();
3876
3877 #if !INCLUDE_CDS
3878 if (DumpSharedSpaces || RequireSharedSpaces) {
3879 jio_fprintf(defaultStream::error_stream(),
3880 "Shared spaces are not supported in this VM\n");
3881 return JNI_ERR;
3882 }
3883 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) ||
3884 log_is_enabled(Info, cds)) {
3885 warning("Shared spaces are not supported in this VM");
3886 FLAG_SET_DEFAULT(UseSharedSpaces, false);
3887 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(cds));
3888 }
3889 no_shared_spaces("CDS Disabled");
3890 #endif // INCLUDE_CDS
3891
3892 return JNI_OK;
3893 }
3894
3895 jint Arguments::apply_ergo() {
3896 // Set flags based on ergonomics.
3897 jint result = set_ergonomics_flags();
3898 if (result != JNI_OK) return result;
3899
3900 // Set heap size based on available physical memory
3901 set_heap_size();
3902
3903 GCConfig::arguments()->initialize();
3904
3905 set_shared_spaces_flags();
3906
3907 // Initialize Metaspace flags and alignments
3908 Metaspace::ergo_initialize();
3909
3910 // Set compiler flags after GC is selected and GC specific
3911 // flags (LoopStripMiningIter) are set.
3912 CompilerConfig::ergo_initialize();
3913
3914 // Set bytecode rewriting flags
3915 set_bytecode_flags();
3916
3917 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled
3918 jint code = set_aggressive_opts_flags();
3919 if (code != JNI_OK) {
3920 return code;
3921 }
3922
3923 // Turn off biased locking for locking debug mode flags,
3924 // which are subtly different from each other but neither works with
3925 // biased locking
3926 if (UseHeavyMonitors
3927 #ifdef COMPILER1
3928 || !UseFastLocking
3929 #endif // COMPILER1
3930 #if INCLUDE_JVMCI
3931 || !JVMCIUseFastLocking
3932 #endif
3933 ) {
3934 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) {
3935 // flag set to true on command line; warn the user that they
3936 // can't enable biased locking here
3937 warning("Biased Locking is not supported with locking debug flags"
3938 "; ignoring UseBiasedLocking flag." );
3939 }
3940 UseBiasedLocking = false;
3941 }
3942
3943 #ifdef CC_INTERP
3944 // Clear flags not supported on zero.
3945 FLAG_SET_DEFAULT(ProfileInterpreter, false);
3946 FLAG_SET_DEFAULT(UseBiasedLocking, false);
3947 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false));
3948 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false));
3949 #endif // CC_INTERP
3950
3951 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) {
3952 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output");
3953 DebugNonSafepoints = true;
3954 }
3955
3956 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) {
3957 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used");
3958 }
3959
3960 #ifndef PRODUCT
3961 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) {
3962 if (use_vm_log()) {
3963 LogVMOutput = true;
3964 }
3965 }
3966 #endif // PRODUCT
3967
3968 if (PrintCommandLineFlags) {
3969 JVMFlag::printSetFlags(tty);
3970 }
3971
3972 // Apply CPU specific policy for the BiasedLocking
3973 if (UseBiasedLocking) {
3974 if (!VM_Version::use_biased_locking() &&
3975 !(FLAG_IS_CMDLINE(UseBiasedLocking))) {
3976 UseBiasedLocking = false;
3977 }
3978 }
3979 #ifdef COMPILER2
3980 if (!UseBiasedLocking || EmitSync != 0) {
3981 UseOptoBiasInlining = false;
3982 }
3983 #endif
3984
3985 #if defined(IA32)
3986 // Only server compiler can optimize safepoints well enough.
3987 if (!is_server_compilation_mode_vm()) {
3988 FLAG_SET_ERGO_IF_DEFAULT(bool, ThreadLocalHandshakes, false);
3989 }
3990 #endif
3991
3992 // ThreadLocalHandshakesConstraintFunc handles the constraints.
3993 if (FLAG_IS_DEFAULT(ThreadLocalHandshakes) || !SafepointMechanism::supports_thread_local_poll()) {
3994 log_debug(ergo)("ThreadLocalHandshakes %s", ThreadLocalHandshakes ? "enabled." : "disabled.");
3995 } else {
3996 log_info(ergo)("ThreadLocalHandshakes %s", ThreadLocalHandshakes ? "enabled." : "disabled.");
3997 }
3998
3999 return JNI_OK;
4000 }
4001
4002 jint Arguments::adjust_after_os() {
4003 if (UseNUMA) {
4004 if (!FLAG_IS_DEFAULT(AllocateHeapAt)) {
4005 FLAG_SET_ERGO(bool, UseNUMA, false);
4006 } else if (UseParallelGC || UseParallelOldGC) {
4007 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) {
4008 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M);
4009 }
4010 }
4011 // UseNUMAInterleaving is set to ON for all collectors and
4012 // platforms when UseNUMA is set to ON. NUMA-aware collectors
4013 // such as the parallel collector for Linux and Solaris will
4014 // interleave old gen and survivor spaces on top of NUMA
4015 // allocation policy for the eden space.
4016 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on
4017 // all platforms and ParallelGC on Windows will interleave all
4018 // of the heap spaces across NUMA nodes.
4019 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) {
4020 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true);
4021 }
4022 }
4023 return JNI_OK;
4024 }
4025
4026 int Arguments::PropertyList_count(SystemProperty* pl) {
4027 int count = 0;
4028 while(pl != NULL) {
4029 count++;
4030 pl = pl->next();
4031 }
4032 return count;
4033 }
4034
4035 // Return the number of readable properties.
4036 int Arguments::PropertyList_readable_count(SystemProperty* pl) {
4037 int count = 0;
4038 while(pl != NULL) {
4039 if (pl->is_readable()) {
4040 count++;
4041 }
4042 pl = pl->next();
4043 }
4044 return count;
4045 }
4046
4047 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) {
4048 assert(key != NULL, "just checking");
4049 SystemProperty* prop;
4050 for (prop = pl; prop != NULL; prop = prop->next()) {
4051 if (strcmp(key, prop->key()) == 0) return prop->value();
4052 }
4053 return NULL;
4054 }
4055
4056 // Return the value of the requested property provided that it is a readable property.
4057 const char* Arguments::PropertyList_get_readable_value(SystemProperty *pl, const char* key) {
4058 assert(key != NULL, "just checking");
4059 SystemProperty* prop;
4060 // Return the property value if the keys match and the property is not internal or
4061 // it's the special internal property "jdk.boot.class.path.append".
4062 for (prop = pl; prop != NULL; prop = prop->next()) {
4063 if (strcmp(key, prop->key()) == 0) {
4064 if (!prop->internal()) {
4065 return prop->value();
4066 } else if (strcmp(key, "jdk.boot.class.path.append") == 0) {
4067 return prop->value();
4068 } else {
4069 // Property is internal and not jdk.boot.class.path.append so return NULL.
4070 return NULL;
4071 }
4072 }
4073 }
4074 return NULL;
4075 }
4076
4077 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) {
4078 int count = 0;
4079 const char* ret_val = NULL;
4080
4081 while(pl != NULL) {
4082 if(count >= index) {
4083 ret_val = pl->key();
4084 break;
4085 }
4086 count++;
4087 pl = pl->next();
4088 }
4089
4090 return ret_val;
4091 }
4092
4093 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) {
4094 int count = 0;
4095 char* ret_val = NULL;
4096
4097 while(pl != NULL) {
4098 if(count >= index) {
4099 ret_val = pl->value();
4100 break;
4101 }
4102 count++;
4103 pl = pl->next();
4104 }
4105
4106 return ret_val;
4107 }
4108
4109 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) {
4110 SystemProperty* p = *plist;
4111 if (p == NULL) {
4112 *plist = new_p;
4113 } else {
4114 while (p->next() != NULL) {
4115 p = p->next();
4116 }
4117 p->set_next(new_p);
4118 }
4119 }
4120
4121 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v,
4122 bool writeable, bool internal) {
4123 if (plist == NULL)
4124 return;
4125
4126 SystemProperty* new_p = new SystemProperty(k, v, writeable, internal);
4127 PropertyList_add(plist, new_p);
4128 }
4129
4130 void Arguments::PropertyList_add(SystemProperty *element) {
4131 PropertyList_add(&_system_properties, element);
4132 }
4133
4134 // This add maintains unique property key in the list.
4135 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v,
4136 PropertyAppendable append, PropertyWriteable writeable,
4137 PropertyInternal internal) {
4138 if (plist == NULL)
4139 return;
4140
4141 // If property key exist then update with new value.
4142 SystemProperty* prop;
4143 for (prop = *plist; prop != NULL; prop = prop->next()) {
4144 if (strcmp(k, prop->key()) == 0) {
4145 if (append == AppendProperty) {
4146 prop->append_value(v);
4147 } else {
4148 prop->set_value(v);
4149 }
4150 return;
4151 }
4152 }
4153
4154 PropertyList_add(plist, k, v, writeable == WriteableProperty, internal == InternalProperty);
4155 }
4156
4157 // Copies src into buf, replacing "%%" with "%" and "%p" with pid
4158 // Returns true if all of the source pointed by src has been copied over to
4159 // the destination buffer pointed by buf. Otherwise, returns false.
4160 // Notes:
4161 // 1. If the length (buflen) of the destination buffer excluding the
4162 // NULL terminator character is not long enough for holding the expanded
4163 // pid characters, it also returns false instead of returning the partially
4164 // expanded one.
4165 // 2. The passed in "buflen" should be large enough to hold the null terminator.
4166 bool Arguments::copy_expand_pid(const char* src, size_t srclen,
4167 char* buf, size_t buflen) {
4168 const char* p = src;
4169 char* b = buf;
4170 const char* src_end = &src[srclen];
4171 char* buf_end = &buf[buflen - 1];
4172
4173 while (p < src_end && b < buf_end) {
4174 if (*p == '%') {
4175 switch (*(++p)) {
4176 case '%': // "%%" ==> "%"
4177 *b++ = *p++;
4178 break;
4179 case 'p': { // "%p" ==> current process id
4180 // buf_end points to the character before the last character so
4181 // that we could write '\0' to the end of the buffer.
4182 size_t buf_sz = buf_end - b + 1;
4183 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id());
4184
4185 // if jio_snprintf fails or the buffer is not long enough to hold
4186 // the expanded pid, returns false.
4187 if (ret < 0 || ret >= (int)buf_sz) {
4188 return false;
4189 } else {
4190 b += ret;
4191 assert(*b == '\0', "fail in copy_expand_pid");
4192 if (p == src_end && b == buf_end + 1) {
4193 // reach the end of the buffer.
4194 return true;
4195 }
4196 }
4197 p++;
4198 break;
4199 }
4200 default :
4201 *b++ = '%';
4202 }
4203 } else {
4204 *b++ = *p++;
4205 }
4206 }
4207 *b = '\0';
4208 return (p == src_end); // return false if not all of the source was copied
4209 }