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 { "EmitSync", JDK_Version::undefined(), JDK_Version::jdk(12), JDK_Version::jdk(13) },
578 { "SyncVerbose", JDK_Version::undefined(), JDK_Version::jdk(12), JDK_Version::jdk(13) },
579 { "SyncFlags", JDK_Version::undefined(), JDK_Version::jdk(12), JDK_Version::jdk(13) },
580 { "SyncKnobs", JDK_Version::undefined(), JDK_Version::jdk(12), JDK_Version::jdk(13) },
581
582 #ifdef TEST_VERIFY_SPECIAL_JVM_FLAGS
583 { "dep > obs", JDK_Version::jdk(9), JDK_Version::jdk(8), JDK_Version::undefined() },
584 { "dep > exp ", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(8) },
585 { "obs > exp ", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(8) },
586 { "not deprecated or obsolete", JDK_Version::undefined(), JDK_Version::undefined(), JDK_Version::jdk(9) },
587 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
588 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
589 { "BytecodeVerificationRemote", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::undefined() },
590 #endif
591
592 { NULL, JDK_Version(0), JDK_Version(0) }
593 };
594
595 // Flags that are aliases for other flags.
596 typedef struct {
597 const char* alias_name;
598 const char* real_name;
599 } AliasedFlag;
600
601 static AliasedFlag const aliased_jvm_flags[] = {
602 { "DefaultMaxRAMFraction", "MaxRAMFraction" },
603 { "CreateMinidumpOnCrash", "CreateCoredumpOnCrash" },
604 { NULL, NULL}
605 };
606
607 // NOTE: A compatibility request will be necessary for each alias to be removed.
608 static AliasedLoggingFlag const aliased_logging_flags[] = {
609 { "PrintCompressedOopsMode", LogLevel::Info, true, LOG_TAGS(gc, heap, coops) },
610 { "PrintSharedSpaces", LogLevel::Info, true, LOG_TAGS(cds) },
611 { "TraceBiasedLocking", LogLevel::Info, true, LOG_TAGS(biasedlocking) },
612 { "TraceClassLoading", LogLevel::Info, true, LOG_TAGS(class, load) },
613 { "TraceClassLoadingPreorder", LogLevel::Debug, true, LOG_TAGS(class, preorder) },
614 { "TraceClassPaths", LogLevel::Info, true, LOG_TAGS(class, path) },
615 { "TraceClassResolution", LogLevel::Debug, true, LOG_TAGS(class, resolve) },
616 { "TraceClassUnloading", LogLevel::Info, true, LOG_TAGS(class, unload) },
617 { "TraceExceptions", LogLevel::Info, true, LOG_TAGS(exceptions) },
618 { "TraceLoaderConstraints", LogLevel::Info, true, LOG_TAGS(class, loader, constraints) },
619 { "TraceMonitorInflation", LogLevel::Debug, true, LOG_TAGS(monitorinflation) },
620 { "TraceSafepointCleanupTime", LogLevel::Info, true, LOG_TAGS(safepoint, cleanup) },
621 { "TraceJVMTIObjectTagging", LogLevel::Debug, true, LOG_TAGS(jvmti, objecttagging) },
622 { "TraceRedefineClasses", LogLevel::Info, false, LOG_TAGS(redefine, class) },
623 { NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG) }
624 };
625
626 #ifndef PRODUCT
627 // These options are removed in jdk9. Remove this code for jdk10.
628 static AliasedFlag const removed_develop_logging_flags[] = {
629 { "TraceClassInitialization", "-Xlog:class+init" },
630 { "TraceClassLoaderData", "-Xlog:class+loader+data" },
631 { "TraceDefaultMethods", "-Xlog:defaultmethods=debug" },
632 { "TraceItables", "-Xlog:itables=debug" },
633 { "TraceMonitorMismatch", "-Xlog:monitormismatch=info" },
634 { "TraceSafepoint", "-Xlog:safepoint=debug" },
635 { "TraceStartupTime", "-Xlog:startuptime" },
636 { "TraceVMOperation", "-Xlog:vmoperation=debug" },
637 { "PrintVtables", "-Xlog:vtables=debug" },
638 { "VerboseVerification", "-Xlog:verification" },
639 { NULL, NULL }
640 };
641 #endif //PRODUCT
642
643 // Return true if "v" is less than "other", where "other" may be "undefined".
644 static bool version_less_than(JDK_Version v, JDK_Version other) {
645 assert(!v.is_undefined(), "must be defined");
646 if (!other.is_undefined() && v.compare(other) >= 0) {
647 return false;
648 } else {
649 return true;
650 }
651 }
652
653 extern bool lookup_special_flag_ext(const char *flag_name, SpecialFlag& flag);
654
655 static bool lookup_special_flag(const char *flag_name, SpecialFlag& flag) {
656 // Allow extensions to have priority
657 if (lookup_special_flag_ext(flag_name, flag)) {
658 return true;
659 }
660
661 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
662 if ((strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
663 flag = special_jvm_flags[i];
664 return true;
665 }
666 }
667 return false;
668 }
669
670 bool Arguments::is_obsolete_flag(const char *flag_name, JDK_Version* version) {
671 assert(version != NULL, "Must provide a version buffer");
672 SpecialFlag flag;
673 if (lookup_special_flag(flag_name, flag)) {
674 if (!flag.obsolete_in.is_undefined()) {
675 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) {
676 *version = flag.obsolete_in;
677 return true;
678 }
679 }
680 }
681 return false;
682 }
683
684 int Arguments::is_deprecated_flag(const char *flag_name, JDK_Version* version) {
685 assert(version != NULL, "Must provide a version buffer");
686 SpecialFlag flag;
687 if (lookup_special_flag(flag_name, flag)) {
688 if (!flag.deprecated_in.is_undefined()) {
689 if (version_less_than(JDK_Version::current(), flag.obsolete_in) &&
690 version_less_than(JDK_Version::current(), flag.expired_in)) {
691 *version = flag.deprecated_in;
692 return 1;
693 } else {
694 return -1;
695 }
696 }
697 }
698 return 0;
699 }
700
701 #ifndef PRODUCT
702 const char* Arguments::removed_develop_logging_flag_name(const char* name){
703 for (size_t i = 0; removed_develop_logging_flags[i].alias_name != NULL; i++) {
704 const AliasedFlag& flag = removed_develop_logging_flags[i];
705 if (strcmp(flag.alias_name, name) == 0) {
706 return flag.real_name;
707 }
708 }
709 return NULL;
710 }
711 #endif // PRODUCT
712
713 const char* Arguments::real_flag_name(const char *flag_name) {
714 for (size_t i = 0; aliased_jvm_flags[i].alias_name != NULL; i++) {
715 const AliasedFlag& flag_status = aliased_jvm_flags[i];
716 if (strcmp(flag_status.alias_name, flag_name) == 0) {
717 return flag_status.real_name;
718 }
719 }
720 return flag_name;
721 }
722
723 #ifdef ASSERT
724 static bool lookup_special_flag(const char *flag_name, size_t skip_index) {
725 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
726 if ((i != skip_index) && (strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
727 return true;
728 }
729 }
730 return false;
731 }
732
733 // Verifies the correctness of the entries in the special_jvm_flags table.
734 // If there is a semantic error (i.e. a bug in the table) such as the obsoletion
735 // version being earlier than the deprecation version, then a warning is issued
736 // and verification fails - by returning false. If it is detected that the table
737 // is out of date, with respect to the current version, then a warning is issued
738 // but verification does not fail. This allows the VM to operate when the version
739 // is first updated, without needing to update all the impacted flags at the
740 // same time.
741 static bool verify_special_jvm_flags() {
742 bool success = true;
743 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
744 const SpecialFlag& flag = special_jvm_flags[i];
745 if (lookup_special_flag(flag.name, i)) {
746 warning("Duplicate special flag declaration \"%s\"", flag.name);
747 success = false;
748 }
749 if (flag.deprecated_in.is_undefined() &&
750 flag.obsolete_in.is_undefined()) {
751 warning("Special flag entry \"%s\" must declare version deprecated and/or obsoleted in.", flag.name);
752 success = false;
753 }
754
755 if (!flag.deprecated_in.is_undefined()) {
756 if (!version_less_than(flag.deprecated_in, flag.obsolete_in)) {
757 warning("Special flag entry \"%s\" must be deprecated before obsoleted.", flag.name);
758 success = false;
759 }
760
761 if (!version_less_than(flag.deprecated_in, flag.expired_in)) {
762 warning("Special flag entry \"%s\" must be deprecated before expired.", flag.name);
763 success = false;
764 }
765 }
766
767 if (!flag.obsolete_in.is_undefined()) {
768 if (!version_less_than(flag.obsolete_in, flag.expired_in)) {
769 warning("Special flag entry \"%s\" must be obsoleted before expired.", flag.name);
770 success = false;
771 }
772
773 // if flag has become obsolete it should not have a "globals" flag defined anymore.
774 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) {
775 if (JVMFlag::find_flag(flag.name) != NULL) {
776 // Temporarily disable the warning: 8196739
777 // warning("Global variable for obsolete special flag entry \"%s\" should be removed", flag.name);
778 }
779 }
780 }
781
782 if (!flag.expired_in.is_undefined()) {
783 // if flag has become expired it should not have a "globals" flag defined anymore.
784 if (!version_less_than(JDK_Version::current(), flag.expired_in)) {
785 if (JVMFlag::find_flag(flag.name) != NULL) {
786 // Temporarily disable the warning: 8196739
787 // warning("Global variable for expired flag entry \"%s\" should be removed", flag.name);
788 }
789 }
790 }
791
792 }
793 return success;
794 }
795 #endif
796
797 // Parses a size specification string.
798 bool Arguments::atojulong(const char *s, julong* result) {
799 julong n = 0;
800
801 // First char must be a digit. Don't allow negative numbers or leading spaces.
802 if (!isdigit(*s)) {
803 return false;
804 }
805
806 bool is_hex = (s[0] == '0' && (s[1] == 'x' || s[1] == 'X'));
807 char* remainder;
808 errno = 0;
809 n = strtoull(s, &remainder, (is_hex ? 16 : 10));
810 if (errno != 0) {
811 return false;
812 }
813
814 // Fail if no number was read at all or if the remainder contains more than a single non-digit character.
815 if (remainder == s || strlen(remainder) > 1) {
816 return false;
817 }
818
819 switch (*remainder) {
820 case 'T': case 't':
821 *result = n * G * K;
822 // Check for overflow.
823 if (*result/((julong)G * K) != n) return false;
824 return true;
825 case 'G': case 'g':
826 *result = n * G;
827 if (*result/G != n) return false;
828 return true;
829 case 'M': case 'm':
830 *result = n * M;
831 if (*result/M != n) return false;
832 return true;
833 case 'K': case 'k':
834 *result = n * K;
835 if (*result/K != n) return false;
836 return true;
837 case '\0':
838 *result = n;
839 return true;
840 default:
841 return false;
842 }
843 }
844
845 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size, julong max_size) {
846 if (size < min_size) return arg_too_small;
847 if (size > max_size) return arg_too_big;
848 return arg_in_range;
849 }
850
851 // Describe an argument out of range error
852 void Arguments::describe_range_error(ArgsRange errcode) {
853 switch(errcode) {
854 case arg_too_big:
855 jio_fprintf(defaultStream::error_stream(),
856 "The specified size exceeds the maximum "
857 "representable size.\n");
858 break;
859 case arg_too_small:
860 case arg_unreadable:
861 case arg_in_range:
862 // do nothing for now
863 break;
864 default:
865 ShouldNotReachHere();
866 }
867 }
868
869 static bool set_bool_flag(const char* name, bool value, JVMFlag::Flags origin) {
870 if (JVMFlag::boolAtPut(name, &value, origin) == JVMFlag::SUCCESS) {
871 return true;
872 } else {
873 return false;
874 }
875 }
876
877 static bool set_fp_numeric_flag(const char* name, char* value, JVMFlag::Flags origin) {
878 char* end;
879 errno = 0;
880 double v = strtod(value, &end);
881 if ((errno != 0) || (*end != 0)) {
882 return false;
883 }
884
885 if (JVMFlag::doubleAtPut(name, &v, origin) == JVMFlag::SUCCESS) {
886 return true;
887 }
888 return false;
889 }
890
891 static bool set_numeric_flag(const char* name, char* value, JVMFlag::Flags origin) {
892 julong v;
893 int int_v;
894 intx intx_v;
895 bool is_neg = false;
896 JVMFlag* result = JVMFlag::find_flag(name, strlen(name));
897
898 if (result == NULL) {
899 return false;
900 }
901
902 // Check the sign first since atojulong() parses only unsigned values.
903 if (*value == '-') {
904 if (!result->is_intx() && !result->is_int()) {
905 return false;
906 }
907 value++;
908 is_neg = true;
909 }
910 if (!Arguments::atojulong(value, &v)) {
911 return false;
912 }
913 if (result->is_int()) {
914 int_v = (int) v;
915 if (is_neg) {
916 int_v = -int_v;
917 }
918 return JVMFlag::intAtPut(result, &int_v, origin) == JVMFlag::SUCCESS;
919 } else if (result->is_uint()) {
920 uint uint_v = (uint) v;
921 return JVMFlag::uintAtPut(result, &uint_v, origin) == JVMFlag::SUCCESS;
922 } else if (result->is_intx()) {
923 intx_v = (intx) v;
924 if (is_neg) {
925 intx_v = -intx_v;
926 }
927 return JVMFlag::intxAtPut(result, &intx_v, origin) == JVMFlag::SUCCESS;
928 } else if (result->is_uintx()) {
929 uintx uintx_v = (uintx) v;
930 return JVMFlag::uintxAtPut(result, &uintx_v, origin) == JVMFlag::SUCCESS;
931 } else if (result->is_uint64_t()) {
932 uint64_t uint64_t_v = (uint64_t) v;
933 return JVMFlag::uint64_tAtPut(result, &uint64_t_v, origin) == JVMFlag::SUCCESS;
934 } else if (result->is_size_t()) {
935 size_t size_t_v = (size_t) v;
936 return JVMFlag::size_tAtPut(result, &size_t_v, origin) == JVMFlag::SUCCESS;
937 } else if (result->is_double()) {
938 double double_v = (double) v;
939 return JVMFlag::doubleAtPut(result, &double_v, origin) == JVMFlag::SUCCESS;
940 } else {
941 return false;
942 }
943 }
944
945 static bool set_string_flag(const char* name, const char* value, JVMFlag::Flags origin) {
946 if (JVMFlag::ccstrAtPut(name, &value, origin) != JVMFlag::SUCCESS) return false;
947 // Contract: JVMFlag always returns a pointer that needs freeing.
948 FREE_C_HEAP_ARRAY(char, value);
949 return true;
950 }
951
952 static bool append_to_string_flag(const char* name, const char* new_value, JVMFlag::Flags origin) {
953 const char* old_value = "";
954 if (JVMFlag::ccstrAt(name, &old_value) != JVMFlag::SUCCESS) return false;
955 size_t old_len = old_value != NULL ? strlen(old_value) : 0;
956 size_t new_len = strlen(new_value);
957 const char* value;
958 char* free_this_too = NULL;
959 if (old_len == 0) {
960 value = new_value;
961 } else if (new_len == 0) {
962 value = old_value;
963 } else {
964 size_t length = old_len + 1 + new_len + 1;
965 char* buf = NEW_C_HEAP_ARRAY(char, length, mtArguments);
966 // each new setting adds another LINE to the switch:
967 jio_snprintf(buf, length, "%s\n%s", old_value, new_value);
968 value = buf;
969 free_this_too = buf;
970 }
971 (void) JVMFlag::ccstrAtPut(name, &value, origin);
972 // JVMFlag always returns a pointer that needs freeing.
973 FREE_C_HEAP_ARRAY(char, value);
974 if (free_this_too != NULL) {
975 // JVMFlag made its own copy, so I must delete my own temp. buffer.
976 FREE_C_HEAP_ARRAY(char, free_this_too);
977 }
978 return true;
979 }
980
981 const char* Arguments::handle_aliases_and_deprecation(const char* arg, bool warn) {
982 const char* real_name = real_flag_name(arg);
983 JDK_Version since = JDK_Version();
984 switch (is_deprecated_flag(arg, &since)) {
985 case -1:
986 return NULL; // obsolete or expired, don't process normally
987 case 0:
988 return real_name;
989 case 1: {
990 if (warn) {
991 char version[256];
992 since.to_string(version, sizeof(version));
993 if (real_name != arg) {
994 warning("Option %s was deprecated in version %s and will likely be removed in a future release. Use option %s instead.",
995 arg, version, real_name);
996 } else {
997 warning("Option %s was deprecated in version %s and will likely be removed in a future release.",
998 arg, version);
999 }
1000 }
1001 return real_name;
1002 }
1003 }
1004 ShouldNotReachHere();
1005 return NULL;
1006 }
1007
1008 void log_deprecated_flag(const char* name, bool on, AliasedLoggingFlag alf) {
1009 LogTagType tagSet[] = {alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5};
1010 // Set tagset string buffer at max size of 256, large enough for any alias tagset
1011 const int max_tagset_size = 256;
1012 int max_tagset_len = max_tagset_size - 1;
1013 char tagset_buffer[max_tagset_size];
1014 tagset_buffer[0] = '\0';
1015
1016 // Write tag-set for aliased logging option, in string list form
1017 int max_tags = sizeof(tagSet)/sizeof(tagSet[0]);
1018 for (int i = 0; i < max_tags && tagSet[i] != LogTag::__NO_TAG; i++) {
1019 if (i > 0) {
1020 strncat(tagset_buffer, "+", max_tagset_len - strlen(tagset_buffer));
1021 }
1022 strncat(tagset_buffer, LogTag::name(tagSet[i]), max_tagset_len - strlen(tagset_buffer));
1023 }
1024 if (!alf.exactMatch) {
1025 strncat(tagset_buffer, "*", max_tagset_len - strlen(tagset_buffer));
1026 }
1027 log_warning(arguments)("-XX:%s%s is deprecated. Will use -Xlog:%s=%s instead.",
1028 (on) ? "+" : "-",
1029 name,
1030 tagset_buffer,
1031 (on) ? LogLevel::name(alf.level) : "off");
1032 }
1033
1034 AliasedLoggingFlag Arguments::catch_logging_aliases(const char* name, bool on){
1035 for (size_t i = 0; aliased_logging_flags[i].alias_name != NULL; i++) {
1036 const AliasedLoggingFlag& alf = aliased_logging_flags[i];
1037 if (strcmp(alf.alias_name, name) == 0) {
1038 log_deprecated_flag(name, on, alf);
1039 return alf;
1040 }
1041 }
1042 AliasedLoggingFlag a = {NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG)};
1043 return a;
1044 }
1045
1046 bool Arguments::parse_argument(const char* arg, JVMFlag::Flags origin) {
1047
1048 // range of acceptable characters spelled out for portability reasons
1049 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]"
1050 #define BUFLEN 255
1051 char name[BUFLEN+1];
1052 char dummy;
1053 const char* real_name;
1054 bool warn_if_deprecated = true;
1055
1056 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
1057 AliasedLoggingFlag alf = catch_logging_aliases(name, false);
1058 if (alf.alias_name != NULL){
1059 LogConfiguration::configure_stdout(LogLevel::Off, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
1060 return true;
1061 }
1062 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1063 if (real_name == NULL) {
1064 return false;
1065 }
1066 return set_bool_flag(real_name, false, origin);
1067 }
1068 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
1069 AliasedLoggingFlag alf = catch_logging_aliases(name, true);
1070 if (alf.alias_name != NULL){
1071 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
1072 return true;
1073 }
1074 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1075 if (real_name == NULL) {
1076 return false;
1077 }
1078 return set_bool_flag(real_name, true, origin);
1079 }
1080
1081 char punct;
1082 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') {
1083 const char* value = strchr(arg, '=') + 1;
1084 JVMFlag* flag;
1085
1086 // this scanf pattern matches both strings (handled here) and numbers (handled later))
1087 AliasedLoggingFlag alf = catch_logging_aliases(name, true);
1088 if (alf.alias_name != NULL) {
1089 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
1090 return true;
1091 }
1092 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1093 if (real_name == NULL) {
1094 return false;
1095 }
1096 flag = JVMFlag::find_flag(real_name);
1097 if (flag != NULL && flag->is_ccstr()) {
1098 if (flag->ccstr_accumulates()) {
1099 return append_to_string_flag(real_name, value, origin);
1100 } else {
1101 if (value[0] == '\0') {
1102 value = NULL;
1103 }
1104 return set_string_flag(real_name, value, origin);
1105 }
1106 } else {
1107 warn_if_deprecated = false; // if arg is deprecated, we've already done warning...
1108 }
1109 }
1110
1111 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') {
1112 const char* value = strchr(arg, '=') + 1;
1113 // -XX:Foo:=xxx will reset the string flag to the given value.
1114 if (value[0] == '\0') {
1115 value = NULL;
1116 }
1117 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1118 if (real_name == NULL) {
1119 return false;
1120 }
1121 return set_string_flag(real_name, value, origin);
1122 }
1123
1124 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.eE+]"
1125 #define SIGNED_NUMBER_RANGE "[-0123456789]"
1126 #define NUMBER_RANGE "[0123456789eE+-]"
1127 char value[BUFLEN + 1];
1128 char value2[BUFLEN + 1];
1129 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) {
1130 // Looks like a floating-point number -- try again with more lenient format string
1131 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) {
1132 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1133 if (real_name == NULL) {
1134 return false;
1135 }
1136 return set_fp_numeric_flag(real_name, value, origin);
1137 }
1138 }
1139
1140 #define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]"
1141 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) {
1142 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1143 if (real_name == NULL) {
1144 return false;
1145 }
1146 return set_numeric_flag(real_name, value, origin);
1147 }
1148
1149 return false;
1150 }
1151
1152 void Arguments::add_string(char*** bldarray, int* count, const char* arg) {
1153 assert(bldarray != NULL, "illegal argument");
1154
1155 if (arg == NULL) {
1156 return;
1157 }
1158
1159 int new_count = *count + 1;
1160
1161 // expand the array and add arg to the last element
1162 if (*bldarray == NULL) {
1163 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtArguments);
1164 } else {
1165 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtArguments);
1166 }
1167 (*bldarray)[*count] = os::strdup_check_oom(arg);
1168 *count = new_count;
1169 }
1170
1171 void Arguments::build_jvm_args(const char* arg) {
1172 add_string(&_jvm_args_array, &_num_jvm_args, arg);
1173 }
1174
1175 void Arguments::build_jvm_flags(const char* arg) {
1176 add_string(&_jvm_flags_array, &_num_jvm_flags, arg);
1177 }
1178
1179 // utility function to return a string that concatenates all
1180 // strings in a given char** array
1181 const char* Arguments::build_resource_string(char** args, int count) {
1182 if (args == NULL || count == 0) {
1183 return NULL;
1184 }
1185 size_t length = 0;
1186 for (int i = 0; i < count; i++) {
1187 length += strlen(args[i]) + 1; // add 1 for a space or NULL terminating character
1188 }
1189 char* s = NEW_RESOURCE_ARRAY(char, length);
1190 char* dst = s;
1191 for (int j = 0; j < count; j++) {
1192 size_t offset = strlen(args[j]) + 1; // add 1 for a space or NULL terminating character
1193 jio_snprintf(dst, length, "%s ", args[j]); // jio_snprintf will replace the last space character with NULL character
1194 dst += offset;
1195 length -= offset;
1196 }
1197 return (const char*) s;
1198 }
1199
1200 void Arguments::print_on(outputStream* st) {
1201 st->print_cr("VM Arguments:");
1202 if (num_jvm_flags() > 0) {
1203 st->print("jvm_flags: "); print_jvm_flags_on(st);
1204 st->cr();
1205 }
1206 if (num_jvm_args() > 0) {
1207 st->print("jvm_args: "); print_jvm_args_on(st);
1208 st->cr();
1209 }
1210 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>");
1211 if (_java_class_path != NULL) {
1212 char* path = _java_class_path->value();
1213 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path );
1214 }
1215 st->print_cr("Launcher Type: %s", _sun_java_launcher);
1216 }
1217
1218 void Arguments::print_summary_on(outputStream* st) {
1219 // Print the command line. Environment variables that are helpful for
1220 // reproducing the problem are written later in the hs_err file.
1221 // flags are from setting file
1222 if (num_jvm_flags() > 0) {
1223 st->print_raw("Settings File: ");
1224 print_jvm_flags_on(st);
1225 st->cr();
1226 }
1227 // args are the command line and environment variable arguments.
1228 st->print_raw("Command Line: ");
1229 if (num_jvm_args() > 0) {
1230 print_jvm_args_on(st);
1231 }
1232 // this is the classfile and any arguments to the java program
1233 if (java_command() != NULL) {
1234 st->print("%s", java_command());
1235 }
1236 st->cr();
1237 }
1238
1239 void Arguments::print_jvm_flags_on(outputStream* st) {
1240 if (_num_jvm_flags > 0) {
1241 for (int i=0; i < _num_jvm_flags; i++) {
1242 st->print("%s ", _jvm_flags_array[i]);
1243 }
1244 }
1245 }
1246
1247 void Arguments::print_jvm_args_on(outputStream* st) {
1248 if (_num_jvm_args > 0) {
1249 for (int i=0; i < _num_jvm_args; i++) {
1250 st->print("%s ", _jvm_args_array[i]);
1251 }
1252 }
1253 }
1254
1255 bool Arguments::process_argument(const char* arg,
1256 jboolean ignore_unrecognized,
1257 JVMFlag::Flags origin) {
1258 JDK_Version since = JDK_Version();
1259
1260 if (parse_argument(arg, origin)) {
1261 return true;
1262 }
1263
1264 // Determine if the flag has '+', '-', or '=' characters.
1265 bool has_plus_minus = (*arg == '+' || *arg == '-');
1266 const char* const argname = has_plus_minus ? arg + 1 : arg;
1267
1268 size_t arg_len;
1269 const char* equal_sign = strchr(argname, '=');
1270 if (equal_sign == NULL) {
1271 arg_len = strlen(argname);
1272 } else {
1273 arg_len = equal_sign - argname;
1274 }
1275
1276 // Only make the obsolete check for valid arguments.
1277 if (arg_len <= BUFLEN) {
1278 // Construct a string which consists only of the argument name without '+', '-', or '='.
1279 char stripped_argname[BUFLEN+1]; // +1 for '\0'
1280 jio_snprintf(stripped_argname, arg_len+1, "%s", argname); // +1 for '\0'
1281 if (is_obsolete_flag(stripped_argname, &since)) {
1282 char version[256];
1283 since.to_string(version, sizeof(version));
1284 warning("Ignoring option %s; support was removed in %s", stripped_argname, version);
1285 return true;
1286 }
1287 #ifndef PRODUCT
1288 else {
1289 const char* replacement;
1290 if ((replacement = removed_develop_logging_flag_name(stripped_argname)) != NULL){
1291 log_warning(arguments)("%s has been removed. Please use %s instead.",
1292 stripped_argname,
1293 replacement);
1294 return false;
1295 }
1296 }
1297 #endif //PRODUCT
1298 }
1299
1300 // For locked flags, report a custom error message if available.
1301 // Otherwise, report the standard unrecognized VM option.
1302 JVMFlag* found_flag = JVMFlag::find_flag((const char*)argname, arg_len, true, true);
1303 if (found_flag != NULL) {
1304 char locked_message_buf[BUFLEN];
1305 JVMFlag::MsgType msg_type = found_flag->get_locked_message(locked_message_buf, BUFLEN);
1306 if (strlen(locked_message_buf) == 0) {
1307 if (found_flag->is_bool() && !has_plus_minus) {
1308 jio_fprintf(defaultStream::error_stream(),
1309 "Missing +/- setting for VM option '%s'\n", argname);
1310 } else if (!found_flag->is_bool() && has_plus_minus) {
1311 jio_fprintf(defaultStream::error_stream(),
1312 "Unexpected +/- setting in VM option '%s'\n", argname);
1313 } else {
1314 jio_fprintf(defaultStream::error_stream(),
1315 "Improperly specified VM option '%s'\n", argname);
1316 }
1317 } else {
1318 #ifdef PRODUCT
1319 bool mismatched = ((msg_type == JVMFlag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD) ||
1320 (msg_type == JVMFlag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD));
1321 if (ignore_unrecognized && mismatched) {
1322 return true;
1323 }
1324 #endif
1325 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf);
1326 }
1327 } else {
1328 if (ignore_unrecognized) {
1329 return true;
1330 }
1331 jio_fprintf(defaultStream::error_stream(),
1332 "Unrecognized VM option '%s'\n", argname);
1333 JVMFlag* fuzzy_matched = JVMFlag::fuzzy_match((const char*)argname, arg_len, true);
1334 if (fuzzy_matched != NULL) {
1335 jio_fprintf(defaultStream::error_stream(),
1336 "Did you mean '%s%s%s'? ",
1337 (fuzzy_matched->is_bool()) ? "(+/-)" : "",
1338 fuzzy_matched->_name,
1339 (fuzzy_matched->is_bool()) ? "" : "=<value>");
1340 }
1341 }
1342
1343 // allow for commandline "commenting out" options like -XX:#+Verbose
1344 return arg[0] == '#';
1345 }
1346
1347 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) {
1348 FILE* stream = fopen(file_name, "rb");
1349 if (stream == NULL) {
1350 if (should_exist) {
1351 jio_fprintf(defaultStream::error_stream(),
1352 "Could not open settings file %s\n", file_name);
1353 return false;
1354 } else {
1355 return true;
1356 }
1357 }
1358
1359 char token[1024];
1360 int pos = 0;
1361
1362 bool in_white_space = true;
1363 bool in_comment = false;
1364 bool in_quote = false;
1365 char quote_c = 0;
1366 bool result = true;
1367
1368 int c = getc(stream);
1369 while(c != EOF && pos < (int)(sizeof(token)-1)) {
1370 if (in_white_space) {
1371 if (in_comment) {
1372 if (c == '\n') in_comment = false;
1373 } else {
1374 if (c == '#') in_comment = true;
1375 else if (!isspace(c)) {
1376 in_white_space = false;
1377 token[pos++] = c;
1378 }
1379 }
1380 } else {
1381 if (c == '\n' || (!in_quote && isspace(c))) {
1382 // token ends at newline, or at unquoted whitespace
1383 // this allows a way to include spaces in string-valued options
1384 token[pos] = '\0';
1385 logOption(token);
1386 result &= process_argument(token, ignore_unrecognized, JVMFlag::CONFIG_FILE);
1387 build_jvm_flags(token);
1388 pos = 0;
1389 in_white_space = true;
1390 in_quote = false;
1391 } else if (!in_quote && (c == '\'' || c == '"')) {
1392 in_quote = true;
1393 quote_c = c;
1394 } else if (in_quote && (c == quote_c)) {
1395 in_quote = false;
1396 } else {
1397 token[pos++] = c;
1398 }
1399 }
1400 c = getc(stream);
1401 }
1402 if (pos > 0) {
1403 token[pos] = '\0';
1404 result &= process_argument(token, ignore_unrecognized, JVMFlag::CONFIG_FILE);
1405 build_jvm_flags(token);
1406 }
1407 fclose(stream);
1408 return result;
1409 }
1410
1411 //=============================================================================================================
1412 // Parsing of properties (-D)
1413
1414 const char* Arguments::get_property(const char* key) {
1415 return PropertyList_get_value(system_properties(), key);
1416 }
1417
1418 bool Arguments::add_property(const char* prop, PropertyWriteable writeable, PropertyInternal internal) {
1419 const char* eq = strchr(prop, '=');
1420 const char* key;
1421 const char* value = "";
1422
1423 if (eq == NULL) {
1424 // property doesn't have a value, thus use passed string
1425 key = prop;
1426 } else {
1427 // property have a value, thus extract it and save to the
1428 // allocated string
1429 size_t key_len = eq - prop;
1430 char* tmp_key = AllocateHeap(key_len + 1, mtArguments);
1431
1432 jio_snprintf(tmp_key, key_len + 1, "%s", prop);
1433 key = tmp_key;
1434
1435 value = &prop[key_len + 1];
1436 }
1437
1438 if (strcmp(key, "java.compiler") == 0) {
1439 process_java_compiler_argument(value);
1440 // Record value in Arguments, but let it get passed to Java.
1441 } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 ||
1442 strcmp(key, "sun.java.launcher.pid") == 0) {
1443 // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are
1444 // private and are processed in process_sun_java_launcher_properties();
1445 // the sun.java.launcher property is passed on to the java application
1446 } else if (strcmp(key, "sun.boot.library.path") == 0) {
1447 // append is true, writable is true, internal is false
1448 PropertyList_unique_add(&_system_properties, key, value, AppendProperty,
1449 WriteableProperty, ExternalProperty);
1450 } else {
1451 if (strcmp(key, "sun.java.command") == 0) {
1452 char *old_java_command = _java_command;
1453 _java_command = os::strdup_check_oom(value, mtArguments);
1454 if (old_java_command != NULL) {
1455 os::free(old_java_command);
1456 }
1457 } else if (strcmp(key, "java.vendor.url.bug") == 0) {
1458 const char* old_java_vendor_url_bug = _java_vendor_url_bug;
1459 // save it in _java_vendor_url_bug, so JVM fatal error handler can access
1460 // its value without going through the property list or making a Java call.
1461 _java_vendor_url_bug = os::strdup_check_oom(value, mtArguments);
1462 if (old_java_vendor_url_bug != DEFAULT_VENDOR_URL_BUG) {
1463 assert(old_java_vendor_url_bug != NULL, "_java_vendor_url_bug is NULL");
1464 os::free((void *)old_java_vendor_url_bug);
1465 }
1466 }
1467
1468 // Create new property and add at the end of the list
1469 PropertyList_unique_add(&_system_properties, key, value, AddProperty, writeable, internal);
1470 }
1471
1472 if (key != prop) {
1473 // SystemProperty copy passed value, thus free previously allocated
1474 // memory
1475 FreeHeap((void *)key);
1476 }
1477
1478 return true;
1479 }
1480
1481 #if INCLUDE_CDS
1482 const char* unsupported_properties[] = { "jdk.module.limitmods",
1483 "jdk.module.upgrade.path",
1484 "jdk.module.patch.0" };
1485 const char* unsupported_options[] = { "--limit-modules",
1486 "--upgrade-module-path",
1487 "--patch-module"
1488 };
1489 void Arguments::check_unsupported_dumping_properties() {
1490 assert(DumpSharedSpaces, "this function is only used with -Xshare:dump");
1491 assert(ARRAY_SIZE(unsupported_properties) == ARRAY_SIZE(unsupported_options), "must be");
1492 // If a vm option is found in the unsupported_options array, vm will exit with an error message.
1493 SystemProperty* sp = system_properties();
1494 while (sp != NULL) {
1495 for (uint i = 0; i < ARRAY_SIZE(unsupported_properties); i++) {
1496 if (strcmp(sp->key(), unsupported_properties[i]) == 0) {
1497 vm_exit_during_initialization(
1498 "Cannot use the following option when dumping the shared archive", unsupported_options[i]);
1499 }
1500 }
1501 sp = sp->next();
1502 }
1503
1504 // Check for an exploded module build in use with -Xshare:dump.
1505 if (!has_jimage()) {
1506 vm_exit_during_initialization("Dumping the shared archive is not supported with an exploded module build");
1507 }
1508 }
1509
1510 bool Arguments::check_unsupported_cds_runtime_properties() {
1511 assert(UseSharedSpaces, "this function is only used with -Xshare:{on,auto}");
1512 assert(ARRAY_SIZE(unsupported_properties) == ARRAY_SIZE(unsupported_options), "must be");
1513 for (uint i = 0; i < ARRAY_SIZE(unsupported_properties); i++) {
1514 if (get_property(unsupported_properties[i]) != NULL) {
1515 if (RequireSharedSpaces) {
1516 warning("CDS is disabled when the %s option is specified.", unsupported_options[i]);
1517 }
1518 return true;
1519 }
1520 }
1521 return false;
1522 }
1523 #endif
1524
1525 //===========================================================================================================
1526 // Setting int/mixed/comp mode flags
1527
1528 void Arguments::set_mode_flags(Mode mode) {
1529 // Set up default values for all flags.
1530 // If you add a flag to any of the branches below,
1531 // add a default value for it here.
1532 set_java_compiler(false);
1533 _mode = mode;
1534
1535 // Ensure Agent_OnLoad has the correct initial values.
1536 // This may not be the final mode; mode may change later in onload phase.
1537 PropertyList_unique_add(&_system_properties, "java.vm.info",
1538 VM_Version::vm_info_string(), AddProperty, UnwriteableProperty, ExternalProperty);
1539
1540 UseInterpreter = true;
1541 UseCompiler = true;
1542 UseLoopCounter = true;
1543
1544 // Default values may be platform/compiler dependent -
1545 // use the saved values
1546 ClipInlining = Arguments::_ClipInlining;
1547 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods;
1548 UseOnStackReplacement = Arguments::_UseOnStackReplacement;
1549 BackgroundCompilation = Arguments::_BackgroundCompilation;
1550 if (TieredCompilation) {
1551 if (FLAG_IS_DEFAULT(Tier3InvokeNotifyFreqLog)) {
1552 Tier3InvokeNotifyFreqLog = Arguments::_Tier3InvokeNotifyFreqLog;
1553 }
1554 if (FLAG_IS_DEFAULT(Tier4InvocationThreshold)) {
1555 Tier4InvocationThreshold = Arguments::_Tier4InvocationThreshold;
1556 }
1557 }
1558
1559 // Change from defaults based on mode
1560 switch (mode) {
1561 default:
1562 ShouldNotReachHere();
1563 break;
1564 case _int:
1565 UseCompiler = false;
1566 UseLoopCounter = false;
1567 AlwaysCompileLoopMethods = false;
1568 UseOnStackReplacement = false;
1569 break;
1570 case _mixed:
1571 // same as default
1572 break;
1573 case _comp:
1574 UseInterpreter = false;
1575 BackgroundCompilation = false;
1576 ClipInlining = false;
1577 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more.
1578 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and
1579 // compile a level 4 (C2) and then continue executing it.
1580 if (TieredCompilation) {
1581 Tier3InvokeNotifyFreqLog = 0;
1582 Tier4InvocationThreshold = 0;
1583 }
1584 break;
1585 }
1586 }
1587
1588 // Conflict: required to use shared spaces (-Xshare:on), but
1589 // incompatible command line options were chosen.
1590 static void no_shared_spaces(const char* message) {
1591 if (RequireSharedSpaces) {
1592 jio_fprintf(defaultStream::error_stream(),
1593 "Class data sharing is inconsistent with other specified options.\n");
1594 vm_exit_during_initialization("Unable to use shared archive", message);
1595 } else {
1596 FLAG_SET_DEFAULT(UseSharedSpaces, false);
1597 }
1598 }
1599
1600 void set_object_alignment() {
1601 // Object alignment.
1602 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2");
1603 MinObjAlignmentInBytes = ObjectAlignmentInBytes;
1604 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small");
1605 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize;
1606 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect");
1607 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1;
1608
1609 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes);
1610 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize;
1611
1612 // Oop encoding heap max
1613 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes;
1614
1615 if (SurvivorAlignmentInBytes == 0) {
1616 SurvivorAlignmentInBytes = ObjectAlignmentInBytes;
1617 }
1618 }
1619
1620 size_t Arguments::max_heap_for_compressed_oops() {
1621 // Avoid sign flip.
1622 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size");
1623 // We need to fit both the NULL page and the heap into the memory budget, while
1624 // keeping alignment constraints of the heap. To guarantee the latter, as the
1625 // NULL page is located before the heap, we pad the NULL page to the conservative
1626 // maximum alignment that the GC may ever impose upon the heap.
1627 size_t displacement_due_to_null_page = align_up((size_t)os::vm_page_size(),
1628 _conservative_max_heap_alignment);
1629
1630 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page);
1631 NOT_LP64(ShouldNotReachHere(); return 0);
1632 }
1633
1634 void Arguments::set_use_compressed_oops() {
1635 #ifndef ZERO
1636 #ifdef _LP64
1637 // MaxHeapSize is not set up properly at this point, but
1638 // the only value that can override MaxHeapSize if we are
1639 // to use UseCompressedOops is InitialHeapSize.
1640 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize);
1641
1642 if (max_heap_size <= max_heap_for_compressed_oops()) {
1643 #if !defined(COMPILER1) || defined(TIERED)
1644 if (FLAG_IS_DEFAULT(UseCompressedOops)) {
1645 FLAG_SET_ERGO(bool, UseCompressedOops, true);
1646 }
1647 #endif
1648 } else {
1649 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) {
1650 warning("Max heap size too large for Compressed Oops");
1651 FLAG_SET_DEFAULT(UseCompressedOops, false);
1652 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1653 }
1654 }
1655 #endif // _LP64
1656 #endif // ZERO
1657 }
1658
1659
1660 // NOTE: set_use_compressed_klass_ptrs() must be called after calling
1661 // set_use_compressed_oops().
1662 void Arguments::set_use_compressed_klass_ptrs() {
1663 #ifndef ZERO
1664 #ifdef _LP64
1665 // UseCompressedOops must be on for UseCompressedClassPointers to be on.
1666 if (!UseCompressedOops) {
1667 if (UseCompressedClassPointers) {
1668 warning("UseCompressedClassPointers requires UseCompressedOops");
1669 }
1670 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1671 } else {
1672 // Turn on UseCompressedClassPointers too
1673 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) {
1674 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true);
1675 }
1676 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs.
1677 if (UseCompressedClassPointers) {
1678 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) {
1679 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers");
1680 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1681 }
1682 }
1683 }
1684 #endif // _LP64
1685 #endif // !ZERO
1686 }
1687
1688 void Arguments::set_conservative_max_heap_alignment() {
1689 // The conservative maximum required alignment for the heap is the maximum of
1690 // the alignments imposed by several sources: any requirements from the heap
1691 // itself, the collector policy and the maximum page size we may run the VM
1692 // with.
1693 size_t heap_alignment = GCConfig::arguments()->conservative_max_heap_alignment();
1694 _conservative_max_heap_alignment = MAX4(heap_alignment,
1695 (size_t)os::vm_allocation_granularity(),
1696 os::max_page_size(),
1697 CollectorPolicy::compute_heap_alignment());
1698 }
1699
1700 jint Arguments::set_ergonomics_flags() {
1701 GCConfig::initialize();
1702
1703 set_conservative_max_heap_alignment();
1704
1705 #ifndef ZERO
1706 #ifdef _LP64
1707 set_use_compressed_oops();
1708
1709 // set_use_compressed_klass_ptrs() must be called after calling
1710 // set_use_compressed_oops().
1711 set_use_compressed_klass_ptrs();
1712
1713 // Also checks that certain machines are slower with compressed oops
1714 // in vm_version initialization code.
1715 #endif // _LP64
1716 #endif // !ZERO
1717
1718 return JNI_OK;
1719 }
1720
1721 julong Arguments::limit_by_allocatable_memory(julong limit) {
1722 julong max_allocatable;
1723 julong result = limit;
1724 if (os::has_allocatable_memory_limit(&max_allocatable)) {
1725 result = MIN2(result, max_allocatable / MaxVirtMemFraction);
1726 }
1727 return result;
1728 }
1729
1730 // Use static initialization to get the default before parsing
1731 static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress;
1732
1733 void Arguments::set_heap_size() {
1734 julong phys_mem =
1735 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM)
1736 : (julong)MaxRAM;
1737
1738 // Convert deprecated flags
1739 if (FLAG_IS_DEFAULT(MaxRAMPercentage) &&
1740 !FLAG_IS_DEFAULT(MaxRAMFraction))
1741 MaxRAMPercentage = 100.0 / MaxRAMFraction;
1742
1743 if (FLAG_IS_DEFAULT(MinRAMPercentage) &&
1744 !FLAG_IS_DEFAULT(MinRAMFraction))
1745 MinRAMPercentage = 100.0 / MinRAMFraction;
1746
1747 if (FLAG_IS_DEFAULT(InitialRAMPercentage) &&
1748 !FLAG_IS_DEFAULT(InitialRAMFraction))
1749 InitialRAMPercentage = 100.0 / InitialRAMFraction;
1750
1751 // If the maximum heap size has not been set with -Xmx,
1752 // then set it as fraction of the size of physical memory,
1753 // respecting the maximum and minimum sizes of the heap.
1754 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
1755 julong reasonable_max = (julong)((phys_mem * MaxRAMPercentage) / 100);
1756 const julong reasonable_min = (julong)((phys_mem * MinRAMPercentage) / 100);
1757 if (reasonable_min < MaxHeapSize) {
1758 // Small physical memory, so use a minimum fraction of it for the heap
1759 reasonable_max = reasonable_min;
1760 } else {
1761 // Not-small physical memory, so require a heap at least
1762 // as large as MaxHeapSize
1763 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize);
1764 }
1765
1766 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) {
1767 // Limit the heap size to ErgoHeapSizeLimit
1768 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit);
1769 }
1770 if (UseCompressedOops) {
1771 // Limit the heap size to the maximum possible when using compressed oops
1772 julong max_coop_heap = (julong)max_heap_for_compressed_oops();
1773
1774 // HeapBaseMinAddress can be greater than default but not less than.
1775 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) {
1776 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) {
1777 // matches compressed oops printing flags
1778 log_debug(gc, heap, coops)("HeapBaseMinAddress must be at least " SIZE_FORMAT
1779 " (" SIZE_FORMAT "G) which is greater than value given " SIZE_FORMAT,
1780 DefaultHeapBaseMinAddress,
1781 DefaultHeapBaseMinAddress/G,
1782 HeapBaseMinAddress);
1783 FLAG_SET_ERGO(size_t, HeapBaseMinAddress, DefaultHeapBaseMinAddress);
1784 }
1785 }
1786
1787 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) {
1788 // Heap should be above HeapBaseMinAddress to get zero based compressed oops
1789 // but it should be not less than default MaxHeapSize.
1790 max_coop_heap -= HeapBaseMinAddress;
1791 }
1792 reasonable_max = MIN2(reasonable_max, max_coop_heap);
1793 }
1794 reasonable_max = limit_by_allocatable_memory(reasonable_max);
1795
1796 if (!FLAG_IS_DEFAULT(InitialHeapSize)) {
1797 // An initial heap size was specified on the command line,
1798 // so be sure that the maximum size is consistent. Done
1799 // after call to limit_by_allocatable_memory because that
1800 // method might reduce the allocation size.
1801 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize);
1802 }
1803
1804 log_trace(gc, heap)(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max);
1805 FLAG_SET_ERGO(size_t, MaxHeapSize, (size_t)reasonable_max);
1806 }
1807
1808 // If the minimum or initial heap_size have not been set or requested to be set
1809 // ergonomically, set them accordingly.
1810 if (InitialHeapSize == 0 || min_heap_size() == 0) {
1811 julong reasonable_minimum = (julong)(OldSize + NewSize);
1812
1813 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize);
1814
1815 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum);
1816
1817 if (InitialHeapSize == 0) {
1818 julong reasonable_initial = (julong)((phys_mem * InitialRAMPercentage) / 100);
1819
1820 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size());
1821 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize);
1822
1823 reasonable_initial = limit_by_allocatable_memory(reasonable_initial);
1824
1825 log_trace(gc, heap)(" Initial heap size " SIZE_FORMAT, (size_t)reasonable_initial);
1826 FLAG_SET_ERGO(size_t, InitialHeapSize, (size_t)reasonable_initial);
1827 }
1828 // If the minimum heap size has not been set (via -Xms),
1829 // synchronize with InitialHeapSize to avoid errors with the default value.
1830 if (min_heap_size() == 0) {
1831 set_min_heap_size(MIN2((size_t)reasonable_minimum, InitialHeapSize));
1832 log_trace(gc, heap)(" Minimum heap size " SIZE_FORMAT, min_heap_size());
1833 }
1834 }
1835 }
1836
1837 // This option inspects the machine and attempts to set various
1838 // parameters to be optimal for long-running, memory allocation
1839 // intensive jobs. It is intended for machines with large
1840 // amounts of cpu and memory.
1841 jint Arguments::set_aggressive_heap_flags() {
1842 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit
1843 // VM, but we may not be able to represent the total physical memory
1844 // available (like having 8gb of memory on a box but using a 32bit VM).
1845 // Thus, we need to make sure we're using a julong for intermediate
1846 // calculations.
1847 julong initHeapSize;
1848 julong total_memory = os::physical_memory();
1849
1850 if (total_memory < (julong) 256 * M) {
1851 jio_fprintf(defaultStream::error_stream(),
1852 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n");
1853 vm_exit(1);
1854 }
1855
1856 // The heap size is half of available memory, or (at most)
1857 // all of possible memory less 160mb (leaving room for the OS
1858 // when using ISM). This is the maximum; because adaptive sizing
1859 // is turned on below, the actual space used may be smaller.
1860
1861 initHeapSize = MIN2(total_memory / (julong) 2,
1862 total_memory - (julong) 160 * M);
1863
1864 initHeapSize = limit_by_allocatable_memory(initHeapSize);
1865
1866 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
1867 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, initHeapSize) != JVMFlag::SUCCESS) {
1868 return JNI_EINVAL;
1869 }
1870 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, initHeapSize) != JVMFlag::SUCCESS) {
1871 return JNI_EINVAL;
1872 }
1873 // Currently the minimum size and the initial heap sizes are the same.
1874 set_min_heap_size(initHeapSize);
1875 }
1876 if (FLAG_IS_DEFAULT(NewSize)) {
1877 // Make the young generation 3/8ths of the total heap.
1878 if (FLAG_SET_CMDLINE(size_t, NewSize,
1879 ((julong) MaxHeapSize / (julong) 8) * (julong) 3) != JVMFlag::SUCCESS) {
1880 return JNI_EINVAL;
1881 }
1882 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, NewSize) != JVMFlag::SUCCESS) {
1883 return JNI_EINVAL;
1884 }
1885 }
1886
1887 #if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
1888 FLAG_SET_DEFAULT(UseLargePages, true);
1889 #endif
1890
1891 // Increase some data structure sizes for efficiency
1892 if (FLAG_SET_CMDLINE(size_t, BaseFootPrintEstimate, MaxHeapSize) != JVMFlag::SUCCESS) {
1893 return JNI_EINVAL;
1894 }
1895 if (FLAG_SET_CMDLINE(bool, ResizeTLAB, false) != JVMFlag::SUCCESS) {
1896 return JNI_EINVAL;
1897 }
1898 if (FLAG_SET_CMDLINE(size_t, TLABSize, 256 * K) != JVMFlag::SUCCESS) {
1899 return JNI_EINVAL;
1900 }
1901
1902 // See the OldPLABSize comment below, but replace 'after promotion'
1903 // with 'after copying'. YoungPLABSize is the size of the survivor
1904 // space per-gc-thread buffers. The default is 4kw.
1905 if (FLAG_SET_CMDLINE(size_t, YoungPLABSize, 256 * K) != JVMFlag::SUCCESS) { // Note: this is in words
1906 return JNI_EINVAL;
1907 }
1908
1909 // OldPLABSize is the size of the buffers in the old gen that
1910 // UseParallelGC uses to promote live data that doesn't fit in the
1911 // survivor spaces. At any given time, there's one for each gc thread.
1912 // The default size is 1kw. These buffers are rarely used, since the
1913 // survivor spaces are usually big enough. For specjbb, however, there
1914 // are occasions when there's lots of live data in the young gen
1915 // and we end up promoting some of it. We don't have a definite
1916 // explanation for why bumping OldPLABSize helps, but the theory
1917 // is that a bigger PLAB results in retaining something like the
1918 // original allocation order after promotion, which improves mutator
1919 // locality. A minor effect may be that larger PLABs reduce the
1920 // number of PLAB allocation events during gc. The value of 8kw
1921 // was arrived at by experimenting with specjbb.
1922 if (FLAG_SET_CMDLINE(size_t, OldPLABSize, 8 * K) != JVMFlag::SUCCESS) { // Note: this is in words
1923 return JNI_EINVAL;
1924 }
1925
1926 // Enable parallel GC and adaptive generation sizing
1927 if (FLAG_SET_CMDLINE(bool, UseParallelGC, true) != JVMFlag::SUCCESS) {
1928 return JNI_EINVAL;
1929 }
1930
1931 // Encourage steady state memory management
1932 if (FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100) != JVMFlag::SUCCESS) {
1933 return JNI_EINVAL;
1934 }
1935
1936 // This appears to improve mutator locality
1937 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != JVMFlag::SUCCESS) {
1938 return JNI_EINVAL;
1939 }
1940
1941 // Get around early Solaris scheduling bug
1942 // (affinity vs other jobs on system)
1943 // but disallow DR and offlining (5008695).
1944 if (FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true) != JVMFlag::SUCCESS) {
1945 return JNI_EINVAL;
1946 }
1947
1948 return JNI_OK;
1949 }
1950
1951 // This must be called after ergonomics.
1952 void Arguments::set_bytecode_flags() {
1953 if (!RewriteBytecodes) {
1954 FLAG_SET_DEFAULT(RewriteFrequentPairs, false);
1955 }
1956 }
1957
1958 // Aggressive optimization flags -XX:+AggressiveOpts
1959 jint Arguments::set_aggressive_opts_flags() {
1960 #ifdef COMPILER2
1961 if (AggressiveUnboxing) {
1962 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
1963 FLAG_SET_DEFAULT(EliminateAutoBox, true);
1964 } else if (!EliminateAutoBox) {
1965 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled");
1966 AggressiveUnboxing = false;
1967 }
1968 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) {
1969 FLAG_SET_DEFAULT(DoEscapeAnalysis, true);
1970 } else if (!DoEscapeAnalysis) {
1971 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled");
1972 AggressiveUnboxing = false;
1973 }
1974 }
1975 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
1976 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
1977 FLAG_SET_DEFAULT(EliminateAutoBox, true);
1978 }
1979 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
1980 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000);
1981 }
1982
1983 // Feed the cache size setting into the JDK
1984 char buffer[1024];
1985 jio_snprintf(buffer, 1024, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax);
1986 if (!add_property(buffer)) {
1987 return JNI_ENOMEM;
1988 }
1989 }
1990 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) {
1991 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500);
1992 }
1993 #endif
1994
1995 if (AggressiveOpts) {
1996 // Sample flag setting code
1997 // if (FLAG_IS_DEFAULT(EliminateZeroing)) {
1998 // FLAG_SET_DEFAULT(EliminateZeroing, true);
1999 // }
2000 }
2001
2002 return JNI_OK;
2003 }
2004
2005 //===========================================================================================================
2006 // Parsing of java.compiler property
2007
2008 void Arguments::process_java_compiler_argument(const char* arg) {
2009 // For backwards compatibility, Djava.compiler=NONE or ""
2010 // causes us to switch to -Xint mode UNLESS -Xdebug
2011 // is also specified.
2012 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) {
2013 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen.
2014 }
2015 }
2016
2017 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) {
2018 _sun_java_launcher = os::strdup_check_oom(launcher);
2019 }
2020
2021 bool Arguments::created_by_java_launcher() {
2022 assert(_sun_java_launcher != NULL, "property must have value");
2023 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0;
2024 }
2025
2026 bool Arguments::sun_java_launcher_is_altjvm() {
2027 return _sun_java_launcher_is_altjvm;
2028 }
2029
2030 //===========================================================================================================
2031 // Parsing of main arguments
2032
2033 unsigned int addreads_count = 0;
2034 unsigned int addexports_count = 0;
2035 unsigned int addopens_count = 0;
2036 unsigned int addmods_count = 0;
2037 unsigned int patch_mod_count = 0;
2038
2039 // Check the consistency of vm_init_args
2040 bool Arguments::check_vm_args_consistency() {
2041 // Method for adding checks for flag consistency.
2042 // The intent is to warn the user of all possible conflicts,
2043 // before returning an error.
2044 // Note: Needs platform-dependent factoring.
2045 bool status = true;
2046
2047 if (TLABRefillWasteFraction == 0) {
2048 jio_fprintf(defaultStream::error_stream(),
2049 "TLABRefillWasteFraction should be a denominator, "
2050 "not " SIZE_FORMAT "\n",
2051 TLABRefillWasteFraction);
2052 status = false;
2053 }
2054
2055 if (PrintNMTStatistics) {
2056 #if INCLUDE_NMT
2057 if (MemTracker::tracking_level() == NMT_off) {
2058 #endif // INCLUDE_NMT
2059 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled");
2060 PrintNMTStatistics = false;
2061 #if INCLUDE_NMT
2062 }
2063 #endif
2064 }
2065
2066 status = CompilerConfig::check_args_consistency(status);
2067 #if INCLUDE_JVMCI
2068 if (status && EnableJVMCI) {
2069 PropertyList_unique_add(&_system_properties, "jdk.internal.vm.ci.enabled", "true",
2070 AddProperty, UnwriteableProperty, InternalProperty);
2071 if (!create_numbered_property("jdk.module.addmods", "jdk.internal.vm.ci", addmods_count++)) {
2072 return false;
2073 }
2074 }
2075 #endif
2076
2077 #ifndef SUPPORT_RESERVED_STACK_AREA
2078 if (StackReservedPages != 0) {
2079 FLAG_SET_CMDLINE(intx, StackReservedPages, 0);
2080 warning("Reserved Stack Area not supported on this platform");
2081 }
2082 #endif
2083
2084 if (!FLAG_IS_DEFAULT(AllocateHeapAt)) {
2085 if ((UseNUMAInterleaving && !FLAG_IS_DEFAULT(UseNUMAInterleaving)) || (UseNUMA && !FLAG_IS_DEFAULT(UseNUMA))) {
2086 log_warning(arguments) ("NUMA support for Heap depends on the file system when AllocateHeapAt option is used.\n");
2087 }
2088 }
2089 return status;
2090 }
2091
2092 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore,
2093 const char* option_type) {
2094 if (ignore) return false;
2095
2096 const char* spacer = " ";
2097 if (option_type == NULL) {
2098 option_type = ++spacer; // Set both to the empty string.
2099 }
2100
2101 if (os::obsolete_option(option)) {
2102 jio_fprintf(defaultStream::error_stream(),
2103 "Obsolete %s%soption: %s\n", option_type, spacer,
2104 option->optionString);
2105 return false;
2106 } else {
2107 jio_fprintf(defaultStream::error_stream(),
2108 "Unrecognized %s%soption: %s\n", option_type, spacer,
2109 option->optionString);
2110 return true;
2111 }
2112 }
2113
2114 static const char* user_assertion_options[] = {
2115 "-da", "-ea", "-disableassertions", "-enableassertions", 0
2116 };
2117
2118 static const char* system_assertion_options[] = {
2119 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0
2120 };
2121
2122 bool Arguments::parse_uintx(const char* value,
2123 uintx* uintx_arg,
2124 uintx min_size) {
2125
2126 // Check the sign first since atojulong() parses only unsigned values.
2127 bool value_is_positive = !(*value == '-');
2128
2129 if (value_is_positive) {
2130 julong n;
2131 bool good_return = atojulong(value, &n);
2132 if (good_return) {
2133 bool above_minimum = n >= min_size;
2134 bool value_is_too_large = n > max_uintx;
2135
2136 if (above_minimum && !value_is_too_large) {
2137 *uintx_arg = n;
2138 return true;
2139 }
2140 }
2141 }
2142 return false;
2143 }
2144
2145 bool Arguments::create_property(const char* prop_name, const char* prop_value, PropertyInternal internal) {
2146 size_t prop_len = strlen(prop_name) + strlen(prop_value) + 2;
2147 char* property = AllocateHeap(prop_len, mtArguments);
2148 int ret = jio_snprintf(property, prop_len, "%s=%s", prop_name, prop_value);
2149 if (ret < 0 || ret >= (int)prop_len) {
2150 FreeHeap(property);
2151 return false;
2152 }
2153 bool added = add_property(property, UnwriteableProperty, internal);
2154 FreeHeap(property);
2155 return added;
2156 }
2157
2158 bool Arguments::create_numbered_property(const char* prop_base_name, const char* prop_value, unsigned int count) {
2159 const unsigned int props_count_limit = 1000;
2160 const int max_digits = 3;
2161 const int extra_symbols_count = 3; // includes '.', '=', '\0'
2162
2163 // Make sure count is < props_count_limit. Otherwise, memory allocation will be too small.
2164 if (count < props_count_limit) {
2165 size_t prop_len = strlen(prop_base_name) + strlen(prop_value) + max_digits + extra_symbols_count;
2166 char* property = AllocateHeap(prop_len, mtArguments);
2167 int ret = jio_snprintf(property, prop_len, "%s.%d=%s", prop_base_name, count, prop_value);
2168 if (ret < 0 || ret >= (int)prop_len) {
2169 FreeHeap(property);
2170 jio_fprintf(defaultStream::error_stream(), "Failed to create property %s.%d=%s\n", prop_base_name, count, prop_value);
2171 return false;
2172 }
2173 bool added = add_property(property, UnwriteableProperty, InternalProperty);
2174 FreeHeap(property);
2175 return added;
2176 }
2177
2178 jio_fprintf(defaultStream::error_stream(), "Property count limit exceeded: %s, limit=%d\n", prop_base_name, props_count_limit);
2179 return false;
2180 }
2181
2182 Arguments::ArgsRange Arguments::parse_memory_size(const char* s,
2183 julong* long_arg,
2184 julong min_size,
2185 julong max_size) {
2186 if (!atojulong(s, long_arg)) return arg_unreadable;
2187 return check_memory_size(*long_arg, min_size, max_size);
2188 }
2189
2190 // Parse JavaVMInitArgs structure
2191
2192 jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args,
2193 const JavaVMInitArgs *java_options_args,
2194 const JavaVMInitArgs *cmd_line_args) {
2195 bool patch_mod_javabase = false;
2196
2197 // Save default settings for some mode flags
2198 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
2199 Arguments::_UseOnStackReplacement = UseOnStackReplacement;
2200 Arguments::_ClipInlining = ClipInlining;
2201 Arguments::_BackgroundCompilation = BackgroundCompilation;
2202 if (TieredCompilation) {
2203 Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
2204 Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
2205 }
2206
2207 // Setup flags for mixed which is the default
2208 set_mode_flags(_mixed);
2209
2210 // Parse args structure generated from JAVA_TOOL_OPTIONS environment
2211 // variable (if present).
2212 jint result = parse_each_vm_init_arg(java_tool_options_args, &patch_mod_javabase, JVMFlag::ENVIRON_VAR);
2213 if (result != JNI_OK) {
2214 return result;
2215 }
2216
2217 // Parse args structure generated from the command line flags.
2218 result = parse_each_vm_init_arg(cmd_line_args, &patch_mod_javabase, JVMFlag::COMMAND_LINE);
2219 if (result != JNI_OK) {
2220 return result;
2221 }
2222
2223 // Parse args structure generated from the _JAVA_OPTIONS environment
2224 // variable (if present) (mimics classic VM)
2225 result = parse_each_vm_init_arg(java_options_args, &patch_mod_javabase, JVMFlag::ENVIRON_VAR);
2226 if (result != JNI_OK) {
2227 return result;
2228 }
2229
2230 // We need to ensure processor and memory resources have been properly
2231 // configured - which may rely on arguments we just processed - before
2232 // doing the final argument processing. Any argument processing that
2233 // needs to know about processor and memory resources must occur after
2234 // this point.
2235
2236 os::init_container_support();
2237
2238 // Do final processing now that all arguments have been parsed
2239 result = finalize_vm_init_args(patch_mod_javabase);
2240 if (result != JNI_OK) {
2241 return result;
2242 }
2243
2244 return JNI_OK;
2245 }
2246
2247 // Checks if name in command-line argument -agent{lib,path}:name[=options]
2248 // represents a valid JDWP agent. is_path==true denotes that we
2249 // are dealing with -agentpath (case where name is a path), otherwise with
2250 // -agentlib
2251 bool valid_jdwp_agent(char *name, bool is_path) {
2252 char *_name;
2253 const char *_jdwp = "jdwp";
2254 size_t _len_jdwp, _len_prefix;
2255
2256 if (is_path) {
2257 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) {
2258 return false;
2259 }
2260
2261 _name++; // skip past last path separator
2262 _len_prefix = strlen(JNI_LIB_PREFIX);
2263
2264 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) {
2265 return false;
2266 }
2267
2268 _name += _len_prefix;
2269 _len_jdwp = strlen(_jdwp);
2270
2271 if (strncmp(_name, _jdwp, _len_jdwp) == 0) {
2272 _name += _len_jdwp;
2273 }
2274 else {
2275 return false;
2276 }
2277
2278 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) {
2279 return false;
2280 }
2281
2282 return true;
2283 }
2284
2285 if (strcmp(name, _jdwp) == 0) {
2286 return true;
2287 }
2288
2289 return false;
2290 }
2291
2292 int Arguments::process_patch_mod_option(const char* patch_mod_tail, bool* patch_mod_javabase) {
2293 // --patch-module=<module>=<file>(<pathsep><file>)*
2294 assert(patch_mod_tail != NULL, "Unexpected NULL patch-module value");
2295 // Find the equal sign between the module name and the path specification
2296 const char* module_equal = strchr(patch_mod_tail, '=');
2297 if (module_equal == NULL) {
2298 jio_fprintf(defaultStream::output_stream(), "Missing '=' in --patch-module specification\n");
2299 return JNI_ERR;
2300 } else {
2301 // Pick out the module name
2302 size_t module_len = module_equal - patch_mod_tail;
2303 char* module_name = NEW_C_HEAP_ARRAY_RETURN_NULL(char, module_len+1, mtArguments);
2304 if (module_name != NULL) {
2305 memcpy(module_name, patch_mod_tail, module_len);
2306 *(module_name + module_len) = '\0';
2307 // The path piece begins one past the module_equal sign
2308 add_patch_mod_prefix(module_name, module_equal + 1, patch_mod_javabase);
2309 FREE_C_HEAP_ARRAY(char, module_name);
2310 if (!create_numbered_property("jdk.module.patch", patch_mod_tail, patch_mod_count++)) {
2311 return JNI_ENOMEM;
2312 }
2313 } else {
2314 return JNI_ENOMEM;
2315 }
2316 }
2317 return JNI_OK;
2318 }
2319
2320 // Parse -Xss memory string parameter and convert to ThreadStackSize in K.
2321 jint Arguments::parse_xss(const JavaVMOption* option, const char* tail, intx* out_ThreadStackSize) {
2322 // The min and max sizes match the values in globals.hpp, but scaled
2323 // with K. The values have been chosen so that alignment with page
2324 // size doesn't change the max value, which makes the conversions
2325 // back and forth between Xss value and ThreadStackSize value easier.
2326 // The values have also been chosen to fit inside a 32-bit signed type.
2327 const julong min_ThreadStackSize = 0;
2328 const julong max_ThreadStackSize = 1 * M;
2329
2330 const julong min_size = min_ThreadStackSize * K;
2331 const julong max_size = max_ThreadStackSize * K;
2332
2333 assert(is_aligned(max_size, os::vm_page_size()), "Implementation assumption");
2334
2335 julong size = 0;
2336 ArgsRange errcode = parse_memory_size(tail, &size, min_size, max_size);
2337 if (errcode != arg_in_range) {
2338 bool silent = (option == NULL); // Allow testing to silence error messages
2339 if (!silent) {
2340 jio_fprintf(defaultStream::error_stream(),
2341 "Invalid thread stack size: %s\n", option->optionString);
2342 describe_range_error(errcode);
2343 }
2344 return JNI_EINVAL;
2345 }
2346
2347 // Internally track ThreadStackSize in units of 1024 bytes.
2348 const julong size_aligned = align_up(size, K);
2349 assert(size <= size_aligned,
2350 "Overflow: " JULONG_FORMAT " " JULONG_FORMAT,
2351 size, size_aligned);
2352
2353 const julong size_in_K = size_aligned / K;
2354 assert(size_in_K < (julong)max_intx,
2355 "size_in_K doesn't fit in the type of ThreadStackSize: " JULONG_FORMAT,
2356 size_in_K);
2357
2358 // Check that code expanding ThreadStackSize to a page aligned number of bytes won't overflow.
2359 const julong max_expanded = align_up(size_in_K * K, os::vm_page_size());
2360 assert(max_expanded < max_uintx && max_expanded >= size_in_K,
2361 "Expansion overflowed: " JULONG_FORMAT " " JULONG_FORMAT,
2362 max_expanded, size_in_K);
2363
2364 *out_ThreadStackSize = (intx)size_in_K;
2365
2366 return JNI_OK;
2367 }
2368
2369 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, bool* patch_mod_javabase, JVMFlag::Flags origin) {
2370 // For match_option to return remaining or value part of option string
2371 const char* tail;
2372
2373 // iterate over arguments
2374 for (int index = 0; index < args->nOptions; index++) {
2375 bool is_absolute_path = false; // for -agentpath vs -agentlib
2376
2377 const JavaVMOption* option = args->options + index;
2378
2379 if (!match_option(option, "-Djava.class.path", &tail) &&
2380 !match_option(option, "-Dsun.java.command", &tail) &&
2381 !match_option(option, "-Dsun.java.launcher", &tail)) {
2382
2383 // add all jvm options to the jvm_args string. This string
2384 // is used later to set the java.vm.args PerfData string constant.
2385 // the -Djava.class.path and the -Dsun.java.command options are
2386 // omitted from jvm_args string as each have their own PerfData
2387 // string constant object.
2388 build_jvm_args(option->optionString);
2389 }
2390
2391 // -verbose:[class/module/gc/jni]
2392 if (match_option(option, "-verbose", &tail)) {
2393 if (!strcmp(tail, ":class") || !strcmp(tail, "")) {
2394 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, load));
2395 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, unload));
2396 } else if (!strcmp(tail, ":module")) {
2397 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, load));
2398 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, unload));
2399 } else if (!strcmp(tail, ":gc")) {
2400 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
2401 } else if (!strcmp(tail, ":jni")) {
2402 if (FLAG_SET_CMDLINE(bool, PrintJNIResolving, true) != JVMFlag::SUCCESS) {
2403 return JNI_EINVAL;
2404 }
2405 }
2406 // -da / -ea / -disableassertions / -enableassertions
2407 // These accept an optional class/package name separated by a colon, e.g.,
2408 // -da:java.lang.Thread.
2409 } else if (match_option(option, user_assertion_options, &tail, true)) {
2410 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2411 if (*tail == '\0') {
2412 JavaAssertions::setUserClassDefault(enable);
2413 } else {
2414 assert(*tail == ':', "bogus match by match_option()");
2415 JavaAssertions::addOption(tail + 1, enable);
2416 }
2417 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions
2418 } else if (match_option(option, system_assertion_options, &tail, false)) {
2419 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2420 JavaAssertions::setSystemClassDefault(enable);
2421 // -bootclasspath:
2422 } else if (match_option(option, "-Xbootclasspath:", &tail)) {
2423 jio_fprintf(defaultStream::output_stream(),
2424 "-Xbootclasspath is no longer a supported option.\n");
2425 return JNI_EINVAL;
2426 // -bootclasspath/a:
2427 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) {
2428 Arguments::append_sysclasspath(tail);
2429 // -bootclasspath/p:
2430 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) {
2431 jio_fprintf(defaultStream::output_stream(),
2432 "-Xbootclasspath/p is no longer a supported option.\n");
2433 return JNI_EINVAL;
2434 // -Xrun
2435 } else if (match_option(option, "-Xrun", &tail)) {
2436 if (tail != NULL) {
2437 const char* pos = strchr(tail, ':');
2438 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2439 char* name = NEW_C_HEAP_ARRAY(char, len + 1, mtArguments);
2440 jio_snprintf(name, len + 1, "%s", tail);
2441
2442 char *options = NULL;
2443 if(pos != NULL) {
2444 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied.
2445 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtArguments), pos+1, len2);
2446 }
2447 #if !INCLUDE_JVMTI
2448 if (strcmp(name, "jdwp") == 0) {
2449 jio_fprintf(defaultStream::error_stream(),
2450 "Debugging agents are not supported in this VM\n");
2451 return JNI_ERR;
2452 }
2453 #endif // !INCLUDE_JVMTI
2454 add_init_library(name, options);
2455 }
2456 } else if (match_option(option, "--add-reads=", &tail)) {
2457 if (!create_numbered_property("jdk.module.addreads", tail, addreads_count++)) {
2458 return JNI_ENOMEM;
2459 }
2460 } else if (match_option(option, "--add-exports=", &tail)) {
2461 if (!create_numbered_property("jdk.module.addexports", tail, addexports_count++)) {
2462 return JNI_ENOMEM;
2463 }
2464 } else if (match_option(option, "--add-opens=", &tail)) {
2465 if (!create_numbered_property("jdk.module.addopens", tail, addopens_count++)) {
2466 return JNI_ENOMEM;
2467 }
2468 } else if (match_option(option, "--add-modules=", &tail)) {
2469 if (!create_numbered_property("jdk.module.addmods", tail, addmods_count++)) {
2470 return JNI_ENOMEM;
2471 }
2472 } else if (match_option(option, "--limit-modules=", &tail)) {
2473 if (!create_property("jdk.module.limitmods", tail, InternalProperty)) {
2474 return JNI_ENOMEM;
2475 }
2476 } else if (match_option(option, "--module-path=", &tail)) {
2477 if (!create_property("jdk.module.path", tail, ExternalProperty)) {
2478 return JNI_ENOMEM;
2479 }
2480 } else if (match_option(option, "--upgrade-module-path=", &tail)) {
2481 if (!create_property("jdk.module.upgrade.path", tail, ExternalProperty)) {
2482 return JNI_ENOMEM;
2483 }
2484 } else if (match_option(option, "--patch-module=", &tail)) {
2485 // --patch-module=<module>=<file>(<pathsep><file>)*
2486 int res = process_patch_mod_option(tail, patch_mod_javabase);
2487 if (res != JNI_OK) {
2488 return res;
2489 }
2490 } else if (match_option(option, "--illegal-access=", &tail)) {
2491 if (!create_property("jdk.module.illegalAccess", tail, ExternalProperty)) {
2492 return JNI_ENOMEM;
2493 }
2494 // -agentlib and -agentpath
2495 } else if (match_option(option, "-agentlib:", &tail) ||
2496 (is_absolute_path = match_option(option, "-agentpath:", &tail))) {
2497 if(tail != NULL) {
2498 const char* pos = strchr(tail, '=');
2499 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2500 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtArguments), tail, len);
2501 name[len] = '\0';
2502
2503 char *options = NULL;
2504 if(pos != NULL) {
2505 options = os::strdup_check_oom(pos + 1, mtArguments);
2506 }
2507 #if !INCLUDE_JVMTI
2508 if (valid_jdwp_agent(name, is_absolute_path)) {
2509 jio_fprintf(defaultStream::error_stream(),
2510 "Debugging agents are not supported in this VM\n");
2511 return JNI_ERR;
2512 }
2513 #endif // !INCLUDE_JVMTI
2514 add_init_agent(name, options, is_absolute_path);
2515 }
2516 // -javaagent
2517 } else if (match_option(option, "-javaagent:", &tail)) {
2518 #if !INCLUDE_JVMTI
2519 jio_fprintf(defaultStream::error_stream(),
2520 "Instrumentation agents are not supported in this VM\n");
2521 return JNI_ERR;
2522 #else
2523 if (tail != NULL) {
2524 size_t length = strlen(tail) + 1;
2525 char *options = NEW_C_HEAP_ARRAY(char, length, mtArguments);
2526 jio_snprintf(options, length, "%s", tail);
2527 add_instrument_agent("instrument", options, false);
2528 // java agents need module java.instrument
2529 if (!create_numbered_property("jdk.module.addmods", "java.instrument", addmods_count++)) {
2530 return JNI_ENOMEM;
2531 }
2532 }
2533 #endif // !INCLUDE_JVMTI
2534 // --enable_preview
2535 } else if (match_option(option, "--enable-preview")) {
2536 set_enable_preview();
2537 // -Xnoclassgc
2538 } else if (match_option(option, "-Xnoclassgc")) {
2539 if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != JVMFlag::SUCCESS) {
2540 return JNI_EINVAL;
2541 }
2542 // -Xconcgc
2543 } else if (match_option(option, "-Xconcgc")) {
2544 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true) != JVMFlag::SUCCESS) {
2545 return JNI_EINVAL;
2546 }
2547 handle_extra_cms_flags("-Xconcgc uses UseConcMarkSweepGC");
2548 // -Xnoconcgc
2549 } else if (match_option(option, "-Xnoconcgc")) {
2550 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false) != JVMFlag::SUCCESS) {
2551 return JNI_EINVAL;
2552 }
2553 handle_extra_cms_flags("-Xnoconcgc uses UseConcMarkSweepGC");
2554 // -Xbatch
2555 } else if (match_option(option, "-Xbatch")) {
2556 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != JVMFlag::SUCCESS) {
2557 return JNI_EINVAL;
2558 }
2559 // -Xmn for compatibility with other JVM vendors
2560 } else if (match_option(option, "-Xmn", &tail)) {
2561 julong long_initial_young_size = 0;
2562 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1);
2563 if (errcode != arg_in_range) {
2564 jio_fprintf(defaultStream::error_stream(),
2565 "Invalid initial young generation size: %s\n", option->optionString);
2566 describe_range_error(errcode);
2567 return JNI_EINVAL;
2568 }
2569 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, (size_t)long_initial_young_size) != JVMFlag::SUCCESS) {
2570 return JNI_EINVAL;
2571 }
2572 if (FLAG_SET_CMDLINE(size_t, NewSize, (size_t)long_initial_young_size) != JVMFlag::SUCCESS) {
2573 return JNI_EINVAL;
2574 }
2575 // -Xms
2576 } else if (match_option(option, "-Xms", &tail)) {
2577 julong long_initial_heap_size = 0;
2578 // an initial heap size of 0 means automatically determine
2579 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0);
2580 if (errcode != arg_in_range) {
2581 jio_fprintf(defaultStream::error_stream(),
2582 "Invalid initial heap size: %s\n", option->optionString);
2583 describe_range_error(errcode);
2584 return JNI_EINVAL;
2585 }
2586 set_min_heap_size((size_t)long_initial_heap_size);
2587 // Currently the minimum size and the initial heap sizes are the same.
2588 // Can be overridden with -XX:InitialHeapSize.
2589 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, (size_t)long_initial_heap_size) != JVMFlag::SUCCESS) {
2590 return JNI_EINVAL;
2591 }
2592 // -Xmx
2593 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) {
2594 julong long_max_heap_size = 0;
2595 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1);
2596 if (errcode != arg_in_range) {
2597 jio_fprintf(defaultStream::error_stream(),
2598 "Invalid maximum heap size: %s\n", option->optionString);
2599 describe_range_error(errcode);
2600 return JNI_EINVAL;
2601 }
2602 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, (size_t)long_max_heap_size) != JVMFlag::SUCCESS) {
2603 return JNI_EINVAL;
2604 }
2605 // Xmaxf
2606 } else if (match_option(option, "-Xmaxf", &tail)) {
2607 char* err;
2608 int maxf = (int)(strtod(tail, &err) * 100);
2609 if (*err != '\0' || *tail == '\0') {
2610 jio_fprintf(defaultStream::error_stream(),
2611 "Bad max heap free percentage size: %s\n",
2612 option->optionString);
2613 return JNI_EINVAL;
2614 } else {
2615 if (FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf) != JVMFlag::SUCCESS) {
2616 return JNI_EINVAL;
2617 }
2618 }
2619 // Xminf
2620 } else if (match_option(option, "-Xminf", &tail)) {
2621 char* err;
2622 int minf = (int)(strtod(tail, &err) * 100);
2623 if (*err != '\0' || *tail == '\0') {
2624 jio_fprintf(defaultStream::error_stream(),
2625 "Bad min heap free percentage size: %s\n",
2626 option->optionString);
2627 return JNI_EINVAL;
2628 } else {
2629 if (FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf) != JVMFlag::SUCCESS) {
2630 return JNI_EINVAL;
2631 }
2632 }
2633 // -Xss
2634 } else if (match_option(option, "-Xss", &tail)) {
2635 intx value = 0;
2636 jint err = parse_xss(option, tail, &value);
2637 if (err != JNI_OK) {
2638 return err;
2639 }
2640 if (FLAG_SET_CMDLINE(intx, ThreadStackSize, value) != JVMFlag::SUCCESS) {
2641 return JNI_EINVAL;
2642 }
2643 } else if (match_option(option, "-Xmaxjitcodesize", &tail) ||
2644 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) {
2645 julong long_ReservedCodeCacheSize = 0;
2646
2647 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1);
2648 if (errcode != arg_in_range) {
2649 jio_fprintf(defaultStream::error_stream(),
2650 "Invalid maximum code cache size: %s.\n", option->optionString);
2651 return JNI_EINVAL;
2652 }
2653 if (FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != JVMFlag::SUCCESS) {
2654 return JNI_EINVAL;
2655 }
2656 // -green
2657 } else if (match_option(option, "-green")) {
2658 jio_fprintf(defaultStream::error_stream(),
2659 "Green threads support not available\n");
2660 return JNI_EINVAL;
2661 // -native
2662 } else if (match_option(option, "-native")) {
2663 // HotSpot always uses native threads, ignore silently for compatibility
2664 // -Xrs
2665 } else if (match_option(option, "-Xrs")) {
2666 // Classic/EVM option, new functionality
2667 if (FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true) != JVMFlag::SUCCESS) {
2668 return JNI_EINVAL;
2669 }
2670 // -Xprof
2671 } else if (match_option(option, "-Xprof")) {
2672 char version[256];
2673 // Obsolete in JDK 10
2674 JDK_Version::jdk(10).to_string(version, sizeof(version));
2675 warning("Ignoring option %s; support was removed in %s", option->optionString, version);
2676 // -Xconcurrentio
2677 } else if (match_option(option, "-Xconcurrentio")) {
2678 if (FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true) != JVMFlag::SUCCESS) {
2679 return JNI_EINVAL;
2680 }
2681 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != JVMFlag::SUCCESS) {
2682 return JNI_EINVAL;
2683 }
2684 SafepointSynchronize::set_defer_thr_suspend_loop_count();
2685 if (FLAG_SET_CMDLINE(bool, UseTLAB, false) != JVMFlag::SUCCESS) {
2686 return JNI_EINVAL;
2687 }
2688 if (FLAG_SET_CMDLINE(size_t, NewSizeThreadIncrease, 16 * K) != JVMFlag::SUCCESS) { // 20Kb per thread added to new generation
2689 return JNI_EINVAL;
2690 }
2691
2692 // -Xinternalversion
2693 } else if (match_option(option, "-Xinternalversion")) {
2694 jio_fprintf(defaultStream::output_stream(), "%s\n",
2695 VM_Version::internal_vm_info_string());
2696 vm_exit(0);
2697 #ifndef PRODUCT
2698 // -Xprintflags
2699 } else if (match_option(option, "-Xprintflags")) {
2700 JVMFlag::printFlags(tty, false);
2701 vm_exit(0);
2702 #endif
2703 // -D
2704 } else if (match_option(option, "-D", &tail)) {
2705 const char* value;
2706 if (match_option(option, "-Djava.endorsed.dirs=", &value) &&
2707 *value!= '\0' && strcmp(value, "\"\"") != 0) {
2708 // abort if -Djava.endorsed.dirs is set
2709 jio_fprintf(defaultStream::output_stream(),
2710 "-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n"
2711 "in modular form will be supported via the concept of upgradeable modules.\n", value);
2712 return JNI_EINVAL;
2713 }
2714 if (match_option(option, "-Djava.ext.dirs=", &value) &&
2715 *value != '\0' && strcmp(value, "\"\"") != 0) {
2716 // abort if -Djava.ext.dirs is set
2717 jio_fprintf(defaultStream::output_stream(),
2718 "-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value);
2719 return JNI_EINVAL;
2720 }
2721 // Check for module related properties. They must be set using the modules
2722 // options. For example: use "--add-modules=java.sql", not
2723 // "-Djdk.module.addmods=java.sql"
2724 if (is_internal_module_property(option->optionString + 2)) {
2725 needs_module_property_warning = true;
2726 continue;
2727 }
2728
2729 if (!add_property(tail)) {
2730 return JNI_ENOMEM;
2731 }
2732 // Out of the box management support
2733 if (match_option(option, "-Dcom.sun.management", &tail)) {
2734 #if INCLUDE_MANAGEMENT
2735 if (FLAG_SET_CMDLINE(bool, ManagementServer, true) != JVMFlag::SUCCESS) {
2736 return JNI_EINVAL;
2737 }
2738 // management agent in module jdk.management.agent
2739 if (!create_numbered_property("jdk.module.addmods", "jdk.management.agent", addmods_count++)) {
2740 return JNI_ENOMEM;
2741 }
2742 #else
2743 jio_fprintf(defaultStream::output_stream(),
2744 "-Dcom.sun.management is not supported in this VM.\n");
2745 return JNI_ERR;
2746 #endif
2747 }
2748 // -Xint
2749 } else if (match_option(option, "-Xint")) {
2750 set_mode_flags(_int);
2751 // -Xmixed
2752 } else if (match_option(option, "-Xmixed")) {
2753 set_mode_flags(_mixed);
2754 // -Xcomp
2755 } else if (match_option(option, "-Xcomp")) {
2756 // for testing the compiler; turn off all flags that inhibit compilation
2757 set_mode_flags(_comp);
2758 // -Xshare:dump
2759 } else if (match_option(option, "-Xshare:dump")) {
2760 if (FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true) != JVMFlag::SUCCESS) {
2761 return JNI_EINVAL;
2762 }
2763 set_mode_flags(_int); // Prevent compilation, which creates objects
2764 // -Xshare:on
2765 } else if (match_option(option, "-Xshare:on")) {
2766 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != JVMFlag::SUCCESS) {
2767 return JNI_EINVAL;
2768 }
2769 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != JVMFlag::SUCCESS) {
2770 return JNI_EINVAL;
2771 }
2772 // -Xshare:auto
2773 } else if (match_option(option, "-Xshare:auto")) {
2774 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != JVMFlag::SUCCESS) {
2775 return JNI_EINVAL;
2776 }
2777 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != JVMFlag::SUCCESS) {
2778 return JNI_EINVAL;
2779 }
2780 // -Xshare:off
2781 } else if (match_option(option, "-Xshare:off")) {
2782 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, false) != JVMFlag::SUCCESS) {
2783 return JNI_EINVAL;
2784 }
2785 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != JVMFlag::SUCCESS) {
2786 return JNI_EINVAL;
2787 }
2788 // -Xverify
2789 } else if (match_option(option, "-Xverify", &tail)) {
2790 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) {
2791 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true) != JVMFlag::SUCCESS) {
2792 return JNI_EINVAL;
2793 }
2794 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != JVMFlag::SUCCESS) {
2795 return JNI_EINVAL;
2796 }
2797 } else if (strcmp(tail, ":remote") == 0) {
2798 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != JVMFlag::SUCCESS) {
2799 return JNI_EINVAL;
2800 }
2801 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != JVMFlag::SUCCESS) {
2802 return JNI_EINVAL;
2803 }
2804 } else if (strcmp(tail, ":none") == 0) {
2805 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != JVMFlag::SUCCESS) {
2806 return JNI_EINVAL;
2807 }
2808 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false) != JVMFlag::SUCCESS) {
2809 return JNI_EINVAL;
2810 }
2811 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) {
2812 return JNI_EINVAL;
2813 }
2814 // -Xdebug
2815 } else if (match_option(option, "-Xdebug")) {
2816 // note this flag has been used, then ignore
2817 set_xdebug_mode(true);
2818 // -Xnoagent
2819 } else if (match_option(option, "-Xnoagent")) {
2820 // For compatibility with classic. HotSpot refuses to load the old style agent.dll.
2821 } else if (match_option(option, "-Xloggc:", &tail)) {
2822 // Deprecated flag to redirect GC output to a file. -Xloggc:<filename>
2823 log_warning(gc)("-Xloggc is deprecated. Will use -Xlog:gc:%s instead.", tail);
2824 _gc_log_filename = os::strdup_check_oom(tail);
2825 } else if (match_option(option, "-Xlog", &tail)) {
2826 bool ret = false;
2827 if (strcmp(tail, ":help") == 0) {
2828 fileStream stream(defaultStream::output_stream());
2829 LogConfiguration::print_command_line_help(&stream);
2830 vm_exit(0);
2831 } else if (strcmp(tail, ":disable") == 0) {
2832 LogConfiguration::disable_logging();
2833 ret = true;
2834 } else if (*tail == '\0') {
2835 ret = LogConfiguration::parse_command_line_arguments();
2836 assert(ret, "-Xlog without arguments should never fail to parse");
2837 } else if (*tail == ':') {
2838 ret = LogConfiguration::parse_command_line_arguments(tail + 1);
2839 }
2840 if (ret == false) {
2841 jio_fprintf(defaultStream::error_stream(),
2842 "Invalid -Xlog option '-Xlog%s', see error log for details.\n",
2843 tail);
2844 return JNI_EINVAL;
2845 }
2846 // JNI hooks
2847 } else if (match_option(option, "-Xcheck", &tail)) {
2848 if (!strcmp(tail, ":jni")) {
2849 #if !INCLUDE_JNI_CHECK
2850 warning("JNI CHECKING is not supported in this VM");
2851 #else
2852 CheckJNICalls = true;
2853 #endif // INCLUDE_JNI_CHECK
2854 } else if (is_bad_option(option, args->ignoreUnrecognized,
2855 "check")) {
2856 return JNI_EINVAL;
2857 }
2858 } else if (match_option(option, "vfprintf")) {
2859 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo);
2860 } else if (match_option(option, "exit")) {
2861 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo);
2862 } else if (match_option(option, "abort")) {
2863 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo);
2864 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure;
2865 // and the last option wins.
2866 } else if (match_option(option, "-XX:+NeverTenure")) {
2867 if (FLAG_SET_CMDLINE(bool, NeverTenure, true) != JVMFlag::SUCCESS) {
2868 return JNI_EINVAL;
2869 }
2870 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != JVMFlag::SUCCESS) {
2871 return JNI_EINVAL;
2872 }
2873 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1) != JVMFlag::SUCCESS) {
2874 return JNI_EINVAL;
2875 }
2876 } else if (match_option(option, "-XX:+AlwaysTenure")) {
2877 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != JVMFlag::SUCCESS) {
2878 return JNI_EINVAL;
2879 }
2880 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != JVMFlag::SUCCESS) {
2881 return JNI_EINVAL;
2882 }
2883 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0) != JVMFlag::SUCCESS) {
2884 return JNI_EINVAL;
2885 }
2886 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) {
2887 uintx max_tenuring_thresh = 0;
2888 if (!parse_uintx(tail, &max_tenuring_thresh, 0)) {
2889 jio_fprintf(defaultStream::error_stream(),
2890 "Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail);
2891 return JNI_EINVAL;
2892 }
2893
2894 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh) != JVMFlag::SUCCESS) {
2895 return JNI_EINVAL;
2896 }
2897
2898 if (MaxTenuringThreshold == 0) {
2899 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != JVMFlag::SUCCESS) {
2900 return JNI_EINVAL;
2901 }
2902 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != JVMFlag::SUCCESS) {
2903 return JNI_EINVAL;
2904 }
2905 } else {
2906 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != JVMFlag::SUCCESS) {
2907 return JNI_EINVAL;
2908 }
2909 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != JVMFlag::SUCCESS) {
2910 return JNI_EINVAL;
2911 }
2912 }
2913 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) {
2914 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false) != JVMFlag::SUCCESS) {
2915 return JNI_EINVAL;
2916 }
2917 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true) != JVMFlag::SUCCESS) {
2918 return JNI_EINVAL;
2919 }
2920 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) {
2921 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false) != JVMFlag::SUCCESS) {
2922 return JNI_EINVAL;
2923 }
2924 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true) != JVMFlag::SUCCESS) {
2925 return JNI_EINVAL;
2926 }
2927 } else if (match_option(option, "-XX:+ExtendedDTraceProbes")) {
2928 #if defined(DTRACE_ENABLED)
2929 if (FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true) != JVMFlag::SUCCESS) {
2930 return JNI_EINVAL;
2931 }
2932 if (FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true) != JVMFlag::SUCCESS) {
2933 return JNI_EINVAL;
2934 }
2935 if (FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true) != JVMFlag::SUCCESS) {
2936 return JNI_EINVAL;
2937 }
2938 if (FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true) != JVMFlag::SUCCESS) {
2939 return JNI_EINVAL;
2940 }
2941 #else // defined(DTRACE_ENABLED)
2942 jio_fprintf(defaultStream::error_stream(),
2943 "ExtendedDTraceProbes flag is not applicable for this configuration\n");
2944 return JNI_EINVAL;
2945 #endif // defined(DTRACE_ENABLED)
2946 #ifdef ASSERT
2947 } else if (match_option(option, "-XX:+FullGCALot")) {
2948 if (FLAG_SET_CMDLINE(bool, FullGCALot, true) != JVMFlag::SUCCESS) {
2949 return JNI_EINVAL;
2950 }
2951 // disable scavenge before parallel mark-compact
2952 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != JVMFlag::SUCCESS) {
2953 return JNI_EINVAL;
2954 }
2955 #endif
2956 #if !INCLUDE_MANAGEMENT
2957 } else if (match_option(option, "-XX:+ManagementServer")) {
2958 jio_fprintf(defaultStream::error_stream(),
2959 "ManagementServer is not supported in this VM.\n");
2960 return JNI_ERR;
2961 #endif // INCLUDE_MANAGEMENT
2962 #if INCLUDE_JFR
2963 } else if (match_jfr_option(&option)) {
2964 return JNI_EINVAL;
2965 #endif
2966 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx
2967 // Skip -XX:Flags= and -XX:VMOptionsFile= since those cases have
2968 // already been handled
2969 if ((strncmp(tail, "Flags=", strlen("Flags=")) != 0) &&
2970 (strncmp(tail, "VMOptionsFile=", strlen("VMOptionsFile=")) != 0)) {
2971 if (!process_argument(tail, args->ignoreUnrecognized, origin)) {
2972 return JNI_EINVAL;
2973 }
2974 }
2975 // Unknown option
2976 } else if (is_bad_option(option, args->ignoreUnrecognized)) {
2977 return JNI_ERR;
2978 }
2979 }
2980
2981 // PrintSharedArchiveAndExit will turn on
2982 // -Xshare:on
2983 // -Xlog:class+path=info
2984 if (PrintSharedArchiveAndExit) {
2985 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != JVMFlag::SUCCESS) {
2986 return JNI_EINVAL;
2987 }
2988 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != JVMFlag::SUCCESS) {
2989 return JNI_EINVAL;
2990 }
2991 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, path));
2992 }
2993
2994 // Change the default value for flags which have different default values
2995 // when working with older JDKs.
2996 #ifdef LINUX
2997 if (JDK_Version::current().compare_major(6) <= 0 &&
2998 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) {
2999 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false);
3000 }
3001 #endif // LINUX
3002 fix_appclasspath();
3003 return JNI_OK;
3004 }
3005
3006 void Arguments::add_patch_mod_prefix(const char* module_name, const char* path, bool* patch_mod_javabase) {
3007 // For java.base check for duplicate --patch-module options being specified on the command line.
3008 // This check is only required for java.base, all other duplicate module specifications
3009 // will be checked during module system initialization. The module system initialization
3010 // will throw an ExceptionInInitializerError if this situation occurs.
3011 if (strcmp(module_name, JAVA_BASE_NAME) == 0) {
3012 if (*patch_mod_javabase) {
3013 vm_exit_during_initialization("Cannot specify " JAVA_BASE_NAME " more than once to --patch-module");
3014 } else {
3015 *patch_mod_javabase = true;
3016 }
3017 }
3018
3019 // Create GrowableArray lazily, only if --patch-module has been specified
3020 if (_patch_mod_prefix == NULL) {
3021 _patch_mod_prefix = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<ModulePatchPath*>(10, true);
3022 }
3023
3024 _patch_mod_prefix->push(new ModulePatchPath(module_name, path));
3025 }
3026
3027 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled)
3028 //
3029 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar
3030 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar".
3031 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty
3032 // path is treated as the current directory.
3033 //
3034 // This causes problems with CDS, which requires that all directories specified in the classpath
3035 // must be empty. In most cases, applications do NOT want to load classes from the current
3036 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up
3037 // scripts compatible with CDS.
3038 void Arguments::fix_appclasspath() {
3039 if (IgnoreEmptyClassPaths) {
3040 const char separator = *os::path_separator();
3041 const char* src = _java_class_path->value();
3042
3043 // skip over all the leading empty paths
3044 while (*src == separator) {
3045 src ++;
3046 }
3047
3048 char* copy = os::strdup_check_oom(src, mtArguments);
3049
3050 // trim all trailing empty paths
3051 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) {
3052 *tail = '\0';
3053 }
3054
3055 char from[3] = {separator, separator, '\0'};
3056 char to [2] = {separator, '\0'};
3057 while (StringUtils::replace_no_expand(copy, from, to) > 0) {
3058 // Keep replacing "::" -> ":" until we have no more "::" (non-windows)
3059 // Keep replacing ";;" -> ";" until we have no more ";;" (windows)
3060 }
3061
3062 _java_class_path->set_writeable_value(copy);
3063 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore
3064 }
3065 }
3066
3067 jint Arguments::finalize_vm_init_args(bool patch_mod_javabase) {
3068 // check if the default lib/endorsed directory exists; if so, error
3069 char path[JVM_MAXPATHLEN];
3070 const char* fileSep = os::file_separator();
3071 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep);
3072
3073 DIR* dir = os::opendir(path);
3074 if (dir != NULL) {
3075 jio_fprintf(defaultStream::output_stream(),
3076 "<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n"
3077 "in modular form will be supported via the concept of upgradeable modules.\n");
3078 os::closedir(dir);
3079 return JNI_ERR;
3080 }
3081
3082 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep);
3083 dir = os::opendir(path);
3084 if (dir != NULL) {
3085 jio_fprintf(defaultStream::output_stream(),
3086 "<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; "
3087 "Use -classpath instead.\n.");
3088 os::closedir(dir);
3089 return JNI_ERR;
3090 }
3091
3092 // This must be done after all arguments have been processed
3093 // and the container support has been initialized since AggressiveHeap
3094 // relies on the amount of total memory available.
3095 if (AggressiveHeap) {
3096 jint result = set_aggressive_heap_flags();
3097 if (result != JNI_OK) {
3098 return result;
3099 }
3100 }
3101
3102 // This must be done after all arguments have been processed.
3103 // java_compiler() true means set to "NONE" or empty.
3104 if (java_compiler() && !xdebug_mode()) {
3105 // For backwards compatibility, we switch to interpreted mode if
3106 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was
3107 // not specified.
3108 set_mode_flags(_int);
3109 }
3110
3111 // CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode),
3112 // but like -Xint, leave compilation thresholds unaffected.
3113 // With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well.
3114 if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) {
3115 set_mode_flags(_int);
3116 }
3117
3118 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set
3119 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) {
3120 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold);
3121 }
3122
3123 #if !COMPILER2_OR_JVMCI
3124 // Don't degrade server performance for footprint
3125 if (FLAG_IS_DEFAULT(UseLargePages) &&
3126 MaxHeapSize < LargePageHeapSizeThreshold) {
3127 // No need for large granularity pages w/small heaps.
3128 // Note that large pages are enabled/disabled for both the
3129 // Java heap and the code cache.
3130 FLAG_SET_DEFAULT(UseLargePages, false);
3131 }
3132
3133 UNSUPPORTED_OPTION(ProfileInterpreter);
3134 NOT_PRODUCT(UNSUPPORTED_OPTION(TraceProfileInterpreter));
3135 #endif
3136
3137 #ifndef TIERED
3138 // Tiered compilation is undefined.
3139 UNSUPPORTED_OPTION(TieredCompilation);
3140 #endif
3141
3142 if (!check_vm_args_consistency()) {
3143 return JNI_ERR;
3144 }
3145
3146 #if INCLUDE_CDS
3147 if (DumpSharedSpaces) {
3148 // Disable biased locking now as it interferes with the clean up of
3149 // the archived Klasses and Java string objects (at dump time only).
3150 UseBiasedLocking = false;
3151
3152 // Always verify non-system classes during CDS dump
3153 if (!BytecodeVerificationRemote) {
3154 BytecodeVerificationRemote = true;
3155 log_info(cds)("All non-system classes will be verified (-Xverify:remote) during CDS dump time.");
3156 }
3157 }
3158 if (UseSharedSpaces && patch_mod_javabase) {
3159 no_shared_spaces("CDS is disabled when " JAVA_BASE_NAME " module is patched.");
3160 }
3161 if (UseSharedSpaces && !DumpSharedSpaces && check_unsupported_cds_runtime_properties()) {
3162 FLAG_SET_DEFAULT(UseSharedSpaces, false);
3163 }
3164 #endif
3165
3166 #ifndef CAN_SHOW_REGISTERS_ON_ASSERT
3167 UNSUPPORTED_OPTION(ShowRegistersOnAssert);
3168 #endif // CAN_SHOW_REGISTERS_ON_ASSERT
3169
3170 return JNI_OK;
3171 }
3172
3173 // Helper class for controlling the lifetime of JavaVMInitArgs
3174 // objects. The contents of the JavaVMInitArgs are guaranteed to be
3175 // deleted on the destruction of the ScopedVMInitArgs object.
3176 class ScopedVMInitArgs : public StackObj {
3177 private:
3178 JavaVMInitArgs _args;
3179 char* _container_name;
3180 bool _is_set;
3181 char* _vm_options_file_arg;
3182
3183 public:
3184 ScopedVMInitArgs(const char *container_name) {
3185 _args.version = JNI_VERSION_1_2;
3186 _args.nOptions = 0;
3187 _args.options = NULL;
3188 _args.ignoreUnrecognized = false;
3189 _container_name = (char *)container_name;
3190 _is_set = false;
3191 _vm_options_file_arg = NULL;
3192 }
3193
3194 // Populates the JavaVMInitArgs object represented by this
3195 // ScopedVMInitArgs object with the arguments in options. The
3196 // allocated memory is deleted by the destructor. If this method
3197 // returns anything other than JNI_OK, then this object is in a
3198 // partially constructed state, and should be abandoned.
3199 jint set_args(GrowableArray<JavaVMOption>* options) {
3200 _is_set = true;
3201 JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL(
3202 JavaVMOption, options->length(), mtArguments);
3203 if (options_arr == NULL) {
3204 return JNI_ENOMEM;
3205 }
3206 _args.options = options_arr;
3207
3208 for (int i = 0; i < options->length(); i++) {
3209 options_arr[i] = options->at(i);
3210 options_arr[i].optionString = os::strdup(options_arr[i].optionString);
3211 if (options_arr[i].optionString == NULL) {
3212 // Rely on the destructor to do cleanup.
3213 _args.nOptions = i;
3214 return JNI_ENOMEM;
3215 }
3216 }
3217
3218 _args.nOptions = options->length();
3219 _args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions;
3220 return JNI_OK;
3221 }
3222
3223 JavaVMInitArgs* get() { return &_args; }
3224 char* container_name() { return _container_name; }
3225 bool is_set() { return _is_set; }
3226 bool found_vm_options_file_arg() { return _vm_options_file_arg != NULL; }
3227 char* vm_options_file_arg() { return _vm_options_file_arg; }
3228
3229 void set_vm_options_file_arg(const char *vm_options_file_arg) {
3230 if (_vm_options_file_arg != NULL) {
3231 os::free(_vm_options_file_arg);
3232 }
3233 _vm_options_file_arg = os::strdup_check_oom(vm_options_file_arg);
3234 }
3235
3236 ~ScopedVMInitArgs() {
3237 if (_vm_options_file_arg != NULL) {
3238 os::free(_vm_options_file_arg);
3239 }
3240 if (_args.options == NULL) return;
3241 for (int i = 0; i < _args.nOptions; i++) {
3242 os::free(_args.options[i].optionString);
3243 }
3244 FREE_C_HEAP_ARRAY(JavaVMOption, _args.options);
3245 }
3246
3247 // Insert options into this option list, to replace option at
3248 // vm_options_file_pos (-XX:VMOptionsFile)
3249 jint insert(const JavaVMInitArgs* args,
3250 const JavaVMInitArgs* args_to_insert,
3251 const int vm_options_file_pos) {
3252 assert(_args.options == NULL, "shouldn't be set yet");
3253 assert(args_to_insert->nOptions != 0, "there should be args to insert");
3254 assert(vm_options_file_pos != -1, "vm_options_file_pos should be set");
3255
3256 int length = args->nOptions + args_to_insert->nOptions - 1;
3257 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments)
3258 GrowableArray<JavaVMOption>(length, true); // Construct new option array
3259 for (int i = 0; i < args->nOptions; i++) {
3260 if (i == vm_options_file_pos) {
3261 // insert the new options starting at the same place as the
3262 // -XX:VMOptionsFile option
3263 for (int j = 0; j < args_to_insert->nOptions; j++) {
3264 options->push(args_to_insert->options[j]);
3265 }
3266 } else {
3267 options->push(args->options[i]);
3268 }
3269 }
3270 // make into options array
3271 jint result = set_args(options);
3272 delete options;
3273 return result;
3274 }
3275 };
3276
3277 jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) {
3278 return parse_options_environment_variable("_JAVA_OPTIONS", args);
3279 }
3280
3281 jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) {
3282 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args);
3283 }
3284
3285 jint Arguments::parse_options_environment_variable(const char* name,
3286 ScopedVMInitArgs* vm_args) {
3287 char *buffer = ::getenv(name);
3288
3289 // Don't check this environment variable if user has special privileges
3290 // (e.g. unix su command).
3291 if (buffer == NULL || os::have_special_privileges()) {
3292 return JNI_OK;
3293 }
3294
3295 if ((buffer = os::strdup(buffer)) == NULL) {
3296 return JNI_ENOMEM;
3297 }
3298
3299 jio_fprintf(defaultStream::error_stream(),
3300 "Picked up %s: %s\n", name, buffer);
3301
3302 int retcode = parse_options_buffer(name, buffer, strlen(buffer), vm_args);
3303
3304 os::free(buffer);
3305 return retcode;
3306 }
3307
3308 jint Arguments::parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args) {
3309 // read file into buffer
3310 int fd = ::open(file_name, O_RDONLY);
3311 if (fd < 0) {
3312 jio_fprintf(defaultStream::error_stream(),
3313 "Could not open options file '%s'\n",
3314 file_name);
3315 return JNI_ERR;
3316 }
3317
3318 struct stat stbuf;
3319 int retcode = os::stat(file_name, &stbuf);
3320 if (retcode != 0) {
3321 jio_fprintf(defaultStream::error_stream(),
3322 "Could not stat options file '%s'\n",
3323 file_name);
3324 os::close(fd);
3325 return JNI_ERR;
3326 }
3327
3328 if (stbuf.st_size == 0) {
3329 // tell caller there is no option data and that is ok
3330 os::close(fd);
3331 return JNI_OK;
3332 }
3333
3334 // '+ 1' for NULL termination even with max bytes
3335 size_t bytes_alloc = stbuf.st_size + 1;
3336
3337 char *buf = NEW_C_HEAP_ARRAY_RETURN_NULL(char, bytes_alloc, mtArguments);
3338 if (NULL == buf) {
3339 jio_fprintf(defaultStream::error_stream(),
3340 "Could not allocate read buffer for options file parse\n");
3341 os::close(fd);
3342 return JNI_ENOMEM;
3343 }
3344
3345 memset(buf, 0, bytes_alloc);
3346
3347 // Fill buffer
3348 // Use ::read() instead of os::read because os::read()
3349 // might do a thread state transition
3350 // and it is too early for that here
3351
3352 ssize_t bytes_read = ::read(fd, (void *)buf, (unsigned)bytes_alloc);
3353 os::close(fd);
3354 if (bytes_read < 0) {
3355 FREE_C_HEAP_ARRAY(char, buf);
3356 jio_fprintf(defaultStream::error_stream(),
3357 "Could not read options file '%s'\n", file_name);
3358 return JNI_ERR;
3359 }
3360
3361 if (bytes_read == 0) {
3362 // tell caller there is no option data and that is ok
3363 FREE_C_HEAP_ARRAY(char, buf);
3364 return JNI_OK;
3365 }
3366
3367 retcode = parse_options_buffer(file_name, buf, bytes_read, vm_args);
3368
3369 FREE_C_HEAP_ARRAY(char, buf);
3370 return retcode;
3371 }
3372
3373 jint Arguments::parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args) {
3374 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<JavaVMOption>(2, true); // Construct option array
3375
3376 // some pointers to help with parsing
3377 char *buffer_end = buffer + buf_len;
3378 char *opt_hd = buffer;
3379 char *wrt = buffer;
3380 char *rd = buffer;
3381
3382 // parse all options
3383 while (rd < buffer_end) {
3384 // skip leading white space from the input string
3385 while (rd < buffer_end && isspace(*rd)) {
3386 rd++;
3387 }
3388
3389 if (rd >= buffer_end) {
3390 break;
3391 }
3392
3393 // Remember this is where we found the head of the token.
3394 opt_hd = wrt;
3395
3396 // Tokens are strings of non white space characters separated
3397 // by one or more white spaces.
3398 while (rd < buffer_end && !isspace(*rd)) {
3399 if (*rd == '\'' || *rd == '"') { // handle a quoted string
3400 int quote = *rd; // matching quote to look for
3401 rd++; // don't copy open quote
3402 while (rd < buffer_end && *rd != quote) {
3403 // include everything (even spaces)
3404 // up until the close quote
3405 *wrt++ = *rd++; // copy to option string
3406 }
3407
3408 if (rd < buffer_end) {
3409 rd++; // don't copy close quote
3410 } else {
3411 // did not see closing quote
3412 jio_fprintf(defaultStream::error_stream(),
3413 "Unmatched quote in %s\n", name);
3414 delete options;
3415 return JNI_ERR;
3416 }
3417 } else {
3418 *wrt++ = *rd++; // copy to option string
3419 }
3420 }
3421
3422 // steal a white space character and set it to NULL
3423 *wrt++ = '\0';
3424 // We now have a complete token
3425
3426 JavaVMOption option;
3427 option.optionString = opt_hd;
3428 option.extraInfo = NULL;
3429
3430 options->append(option); // Fill in option
3431
3432 rd++; // Advance to next character
3433 }
3434
3435 // Fill out JavaVMInitArgs structure.
3436 jint status = vm_args->set_args(options);
3437
3438 delete options;
3439 return status;
3440 }
3441
3442 void Arguments::set_shared_spaces_flags() {
3443 if (DumpSharedSpaces) {
3444 if (FailOverToOldVerifier) {
3445 // Don't fall back to the old verifier on verification failure. If a
3446 // class fails verification with the split verifier, it might fail the
3447 // CDS runtime verifier constraint check. In that case, we don't want
3448 // to share the class. We only archive classes that pass the split verifier.
3449 FLAG_SET_DEFAULT(FailOverToOldVerifier, false);
3450 }
3451
3452 if (RequireSharedSpaces) {
3453 warning("Cannot dump shared archive while using shared archive");
3454 }
3455 UseSharedSpaces = false;
3456 #ifdef _LP64
3457 if (!UseCompressedOops || !UseCompressedClassPointers) {
3458 vm_exit_during_initialization(
3459 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL);
3460 }
3461 } else {
3462 if (!UseCompressedOops || !UseCompressedClassPointers) {
3463 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces.");
3464 }
3465 #endif
3466 }
3467 }
3468
3469 // Sharing support
3470 // Construct the path to the archive
3471 static char* get_shared_archive_path() {
3472 char *shared_archive_path;
3473 if (SharedArchiveFile == NULL) {
3474 char jvm_path[JVM_MAXPATHLEN];
3475 os::jvm_path(jvm_path, sizeof(jvm_path));
3476 char *end = strrchr(jvm_path, *os::file_separator());
3477 if (end != NULL) *end = '\0';
3478 size_t jvm_path_len = strlen(jvm_path);
3479 size_t file_sep_len = strlen(os::file_separator());
3480 const size_t len = jvm_path_len + file_sep_len + 20;
3481 shared_archive_path = NEW_C_HEAP_ARRAY(char, len, mtArguments);
3482 if (shared_archive_path != NULL) {
3483 jio_snprintf(shared_archive_path, len, "%s%sclasses.jsa",
3484 jvm_path, os::file_separator());
3485 }
3486 } else {
3487 shared_archive_path = os::strdup_check_oom(SharedArchiveFile, mtArguments);
3488 }
3489 return shared_archive_path;
3490 }
3491
3492 #ifndef PRODUCT
3493 // Determine whether LogVMOutput should be implicitly turned on.
3494 static bool use_vm_log() {
3495 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) ||
3496 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods ||
3497 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers ||
3498 PrintAssembly || TraceDeoptimization || TraceDependencies ||
3499 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) {
3500 return true;
3501 }
3502
3503 #ifdef COMPILER1
3504 if (PrintC1Statistics) {
3505 return true;
3506 }
3507 #endif // COMPILER1
3508
3509 #ifdef COMPILER2
3510 if (PrintOptoAssembly || PrintOptoStatistics) {
3511 return true;
3512 }
3513 #endif // COMPILER2
3514
3515 return false;
3516 }
3517
3518 #endif // PRODUCT
3519
3520 bool Arguments::args_contains_vm_options_file_arg(const JavaVMInitArgs* args) {
3521 for (int index = 0; index < args->nOptions; index++) {
3522 const JavaVMOption* option = args->options + index;
3523 const char* tail;
3524 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
3525 return true;
3526 }
3527 }
3528 return false;
3529 }
3530
3531 jint Arguments::insert_vm_options_file(const JavaVMInitArgs* args,
3532 const char* vm_options_file,
3533 const int vm_options_file_pos,
3534 ScopedVMInitArgs* vm_options_file_args,
3535 ScopedVMInitArgs* args_out) {
3536 jint code = parse_vm_options_file(vm_options_file, vm_options_file_args);
3537 if (code != JNI_OK) {
3538 return code;
3539 }
3540
3541 if (vm_options_file_args->get()->nOptions < 1) {
3542 return JNI_OK;
3543 }
3544
3545 if (args_contains_vm_options_file_arg(vm_options_file_args->get())) {
3546 jio_fprintf(defaultStream::error_stream(),
3547 "A VM options file may not refer to a VM options file. "
3548 "Specification of '-XX:VMOptionsFile=<file-name>' in the "
3549 "options file '%s' in options container '%s' is an error.\n",
3550 vm_options_file_args->vm_options_file_arg(),
3551 vm_options_file_args->container_name());
3552 return JNI_EINVAL;
3553 }
3554
3555 return args_out->insert(args, vm_options_file_args->get(),
3556 vm_options_file_pos);
3557 }
3558
3559 // Expand -XX:VMOptionsFile found in args_in as needed.
3560 // mod_args and args_out parameters may return values as needed.
3561 jint Arguments::expand_vm_options_as_needed(const JavaVMInitArgs* args_in,
3562 ScopedVMInitArgs* mod_args,
3563 JavaVMInitArgs** args_out) {
3564 jint code = match_special_option_and_act(args_in, mod_args);
3565 if (code != JNI_OK) {
3566 return code;
3567 }
3568
3569 if (mod_args->is_set()) {
3570 // args_in contains -XX:VMOptionsFile and mod_args contains the
3571 // original options from args_in along with the options expanded
3572 // from the VMOptionsFile. Return a short-hand to the caller.
3573 *args_out = mod_args->get();
3574 } else {
3575 *args_out = (JavaVMInitArgs *)args_in; // no changes so use args_in
3576 }
3577 return JNI_OK;
3578 }
3579
3580 jint Arguments::match_special_option_and_act(const JavaVMInitArgs* args,
3581 ScopedVMInitArgs* args_out) {
3582 // Remaining part of option string
3583 const char* tail;
3584 ScopedVMInitArgs vm_options_file_args(args_out->container_name());
3585
3586 for (int index = 0; index < args->nOptions; index++) {
3587 const JavaVMOption* option = args->options + index;
3588 if (ArgumentsExt::process_options(option)) {
3589 continue;
3590 }
3591 if (match_option(option, "-XX:Flags=", &tail)) {
3592 Arguments::set_jvm_flags_file(tail);
3593 continue;
3594 }
3595 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
3596 if (vm_options_file_args.found_vm_options_file_arg()) {
3597 jio_fprintf(defaultStream::error_stream(),
3598 "The option '%s' is already specified in the options "
3599 "container '%s' so the specification of '%s' in the "
3600 "same options container is an error.\n",
3601 vm_options_file_args.vm_options_file_arg(),
3602 vm_options_file_args.container_name(),
3603 option->optionString);
3604 return JNI_EINVAL;
3605 }
3606 vm_options_file_args.set_vm_options_file_arg(option->optionString);
3607 // If there's a VMOptionsFile, parse that
3608 jint code = insert_vm_options_file(args, tail, index,
3609 &vm_options_file_args, args_out);
3610 if (code != JNI_OK) {
3611 return code;
3612 }
3613 args_out->set_vm_options_file_arg(vm_options_file_args.vm_options_file_arg());
3614 if (args_out->is_set()) {
3615 // The VMOptions file inserted some options so switch 'args'
3616 // to the new set of options, and continue processing which
3617 // preserves "last option wins" semantics.
3618 args = args_out->get();
3619 // The first option from the VMOptionsFile replaces the
3620 // current option. So we back track to process the
3621 // replacement option.
3622 index--;
3623 }
3624 continue;
3625 }
3626 if (match_option(option, "-XX:+PrintVMOptions")) {
3627 PrintVMOptions = true;
3628 continue;
3629 }
3630 if (match_option(option, "-XX:-PrintVMOptions")) {
3631 PrintVMOptions = false;
3632 continue;
3633 }
3634 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) {
3635 IgnoreUnrecognizedVMOptions = true;
3636 continue;
3637 }
3638 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) {
3639 IgnoreUnrecognizedVMOptions = false;
3640 continue;
3641 }
3642 if (match_option(option, "-XX:+PrintFlagsInitial")) {
3643 JVMFlag::printFlags(tty, false);
3644 vm_exit(0);
3645 }
3646 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) {
3647 #if INCLUDE_NMT
3648 // The launcher did not setup nmt environment variable properly.
3649 if (!MemTracker::check_launcher_nmt_support(tail)) {
3650 warning("Native Memory Tracking did not setup properly, using wrong launcher?");
3651 }
3652
3653 // Verify if nmt option is valid.
3654 if (MemTracker::verify_nmt_option()) {
3655 // Late initialization, still in single-threaded mode.
3656 if (MemTracker::tracking_level() >= NMT_summary) {
3657 MemTracker::init();
3658 }
3659 } else {
3660 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL);
3661 }
3662 continue;
3663 #else
3664 jio_fprintf(defaultStream::error_stream(),
3665 "Native Memory Tracking is not supported in this VM\n");
3666 return JNI_ERR;
3667 #endif
3668 }
3669
3670 #ifndef PRODUCT
3671 if (match_option(option, "-XX:+PrintFlagsWithComments")) {
3672 JVMFlag::printFlags(tty, true);
3673 vm_exit(0);
3674 }
3675 #endif
3676 }
3677 return JNI_OK;
3678 }
3679
3680 static void print_options(const JavaVMInitArgs *args) {
3681 const char* tail;
3682 for (int index = 0; index < args->nOptions; index++) {
3683 const JavaVMOption *option = args->options + index;
3684 if (match_option(option, "-XX:", &tail)) {
3685 logOption(tail);
3686 }
3687 }
3688 }
3689
3690 bool Arguments::handle_deprecated_print_gc_flags() {
3691 if (PrintGC) {
3692 log_warning(gc)("-XX:+PrintGC is deprecated. Will use -Xlog:gc instead.");
3693 }
3694 if (PrintGCDetails) {
3695 log_warning(gc)("-XX:+PrintGCDetails is deprecated. Will use -Xlog:gc* instead.");
3696 }
3697
3698 if (_gc_log_filename != NULL) {
3699 // -Xloggc was used to specify a filename
3700 const char* gc_conf = PrintGCDetails ? "gc*" : "gc";
3701
3702 LogTarget(Error, logging) target;
3703 LogStream errstream(target);
3704 return LogConfiguration::parse_log_arguments(_gc_log_filename, gc_conf, NULL, NULL, &errstream);
3705 } else if (PrintGC || PrintGCDetails) {
3706 LogConfiguration::configure_stdout(LogLevel::Info, !PrintGCDetails, LOG_TAGS(gc));
3707 }
3708 return true;
3709 }
3710
3711 void Arguments::handle_extra_cms_flags(const char* msg) {
3712 SpecialFlag flag;
3713 const char *flag_name = "UseConcMarkSweepGC";
3714 if (lookup_special_flag(flag_name, flag)) {
3715 handle_aliases_and_deprecation(flag_name, /* print warning */ true);
3716 warning("%s", msg);
3717 }
3718 }
3719
3720 // Parse entry point called from JNI_CreateJavaVM
3721
3722 jint Arguments::parse(const JavaVMInitArgs* initial_cmd_args) {
3723 assert(verify_special_jvm_flags(), "deprecated and obsolete flag table inconsistent");
3724
3725 // Initialize ranges, constraints and writeables
3726 JVMFlagRangeList::init();
3727 JVMFlagConstraintList::init();
3728 JVMFlagWriteableList::init();
3729
3730 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed.
3731 const char* hotspotrc = ".hotspotrc";
3732 bool settings_file_specified = false;
3733 bool needs_hotspotrc_warning = false;
3734 ScopedVMInitArgs initial_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
3735 ScopedVMInitArgs initial_java_options_args("env_var='_JAVA_OPTIONS'");
3736
3737 // Pointers to current working set of containers
3738 JavaVMInitArgs* cur_cmd_args;
3739 JavaVMInitArgs* cur_java_options_args;
3740 JavaVMInitArgs* cur_java_tool_options_args;
3741
3742 // Containers for modified/expanded options
3743 ScopedVMInitArgs mod_cmd_args("cmd_line_args");
3744 ScopedVMInitArgs mod_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
3745 ScopedVMInitArgs mod_java_options_args("env_var='_JAVA_OPTIONS'");
3746
3747
3748 jint code =
3749 parse_java_tool_options_environment_variable(&initial_java_tool_options_args);
3750 if (code != JNI_OK) {
3751 return code;
3752 }
3753
3754 code = parse_java_options_environment_variable(&initial_java_options_args);
3755 if (code != JNI_OK) {
3756 return code;
3757 }
3758
3759 code = expand_vm_options_as_needed(initial_java_tool_options_args.get(),
3760 &mod_java_tool_options_args,
3761 &cur_java_tool_options_args);
3762 if (code != JNI_OK) {
3763 return code;
3764 }
3765
3766 code = expand_vm_options_as_needed(initial_cmd_args,
3767 &mod_cmd_args,
3768 &cur_cmd_args);
3769 if (code != JNI_OK) {
3770 return code;
3771 }
3772
3773 code = expand_vm_options_as_needed(initial_java_options_args.get(),
3774 &mod_java_options_args,
3775 &cur_java_options_args);
3776 if (code != JNI_OK) {
3777 return code;
3778 }
3779
3780 const char* flags_file = Arguments::get_jvm_flags_file();
3781 settings_file_specified = (flags_file != NULL);
3782
3783 if (IgnoreUnrecognizedVMOptions) {
3784 cur_cmd_args->ignoreUnrecognized = true;
3785 cur_java_tool_options_args->ignoreUnrecognized = true;
3786 cur_java_options_args->ignoreUnrecognized = true;
3787 }
3788
3789 // Parse specified settings file
3790 if (settings_file_specified) {
3791 if (!process_settings_file(flags_file, true,
3792 cur_cmd_args->ignoreUnrecognized)) {
3793 return JNI_EINVAL;
3794 }
3795 } else {
3796 #ifdef ASSERT
3797 // Parse default .hotspotrc settings file
3798 if (!process_settings_file(".hotspotrc", false,
3799 cur_cmd_args->ignoreUnrecognized)) {
3800 return JNI_EINVAL;
3801 }
3802 #else
3803 struct stat buf;
3804 if (os::stat(hotspotrc, &buf) == 0) {
3805 needs_hotspotrc_warning = true;
3806 }
3807 #endif
3808 }
3809
3810 if (PrintVMOptions) {
3811 print_options(cur_java_tool_options_args);
3812 print_options(cur_cmd_args);
3813 print_options(cur_java_options_args);
3814 }
3815
3816 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS
3817 jint result = parse_vm_init_args(cur_java_tool_options_args,
3818 cur_java_options_args,
3819 cur_cmd_args);
3820
3821 if (result != JNI_OK) {
3822 return result;
3823 }
3824
3825 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed.
3826 SharedArchivePath = get_shared_archive_path();
3827 if (SharedArchivePath == NULL) {
3828 return JNI_ENOMEM;
3829 }
3830
3831 // Set up VerifySharedSpaces
3832 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) {
3833 VerifySharedSpaces = true;
3834 }
3835
3836 // Delay warning until here so that we've had a chance to process
3837 // the -XX:-PrintWarnings flag
3838 if (needs_hotspotrc_warning) {
3839 warning("%s file is present but has been ignored. "
3840 "Run with -XX:Flags=%s to load the file.",
3841 hotspotrc, hotspotrc);
3842 }
3843
3844 if (needs_module_property_warning) {
3845 warning("Ignoring system property options whose names match the '-Djdk.module.*'."
3846 " names that are reserved for internal use.");
3847 }
3848
3849 #if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
3850 UNSUPPORTED_OPTION(UseLargePages);
3851 #endif
3852
3853 ArgumentsExt::report_unsupported_options();
3854
3855 #ifndef PRODUCT
3856 if (TraceBytecodesAt != 0) {
3857 TraceBytecodes = true;
3858 }
3859 if (CountCompiledCalls) {
3860 if (UseCounterDecay) {
3861 warning("UseCounterDecay disabled because CountCalls is set");
3862 UseCounterDecay = false;
3863 }
3864 }
3865 #endif // PRODUCT
3866
3867 if (ScavengeRootsInCode == 0) {
3868 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) {
3869 warning("Forcing ScavengeRootsInCode non-zero");
3870 }
3871 ScavengeRootsInCode = 1;
3872 }
3873
3874 if (!handle_deprecated_print_gc_flags()) {
3875 return JNI_EINVAL;
3876 }
3877
3878 // Set object alignment values.
3879 set_object_alignment();
3880
3881 #if !INCLUDE_CDS
3882 if (DumpSharedSpaces || RequireSharedSpaces) {
3883 jio_fprintf(defaultStream::error_stream(),
3884 "Shared spaces are not supported in this VM\n");
3885 return JNI_ERR;
3886 }
3887 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) ||
3888 log_is_enabled(Info, cds)) {
3889 warning("Shared spaces are not supported in this VM");
3890 FLAG_SET_DEFAULT(UseSharedSpaces, false);
3891 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(cds));
3892 }
3893 no_shared_spaces("CDS Disabled");
3894 #endif // INCLUDE_CDS
3895
3896 return JNI_OK;
3897 }
3898
3899 jint Arguments::apply_ergo() {
3900 // Set flags based on ergonomics.
3901 jint result = set_ergonomics_flags();
3902 if (result != JNI_OK) return result;
3903
3904 // Set heap size based on available physical memory
3905 set_heap_size();
3906
3907 GCConfig::arguments()->initialize();
3908
3909 set_shared_spaces_flags();
3910
3911 // Initialize Metaspace flags and alignments
3912 Metaspace::ergo_initialize();
3913
3914 // Set compiler flags after GC is selected and GC specific
3915 // flags (LoopStripMiningIter) are set.
3916 CompilerConfig::ergo_initialize();
3917
3918 // Set bytecode rewriting flags
3919 set_bytecode_flags();
3920
3921 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled
3922 jint code = set_aggressive_opts_flags();
3923 if (code != JNI_OK) {
3924 return code;
3925 }
3926
3927 // Turn off biased locking for locking debug mode flags,
3928 // which are subtly different from each other but neither works with
3929 // biased locking
3930 if (UseHeavyMonitors
3931 #ifdef COMPILER1
3932 || !UseFastLocking
3933 #endif // COMPILER1
3934 #if INCLUDE_JVMCI
3935 || !JVMCIUseFastLocking
3936 #endif
3937 ) {
3938 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) {
3939 // flag set to true on command line; warn the user that they
3940 // can't enable biased locking here
3941 warning("Biased Locking is not supported with locking debug flags"
3942 "; ignoring UseBiasedLocking flag." );
3943 }
3944 UseBiasedLocking = false;
3945 }
3946
3947 #ifdef CC_INTERP
3948 // Clear flags not supported on zero.
3949 FLAG_SET_DEFAULT(ProfileInterpreter, false);
3950 FLAG_SET_DEFAULT(UseBiasedLocking, false);
3951 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false));
3952 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false));
3953 #endif // CC_INTERP
3954
3955 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) {
3956 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output");
3957 DebugNonSafepoints = true;
3958 }
3959
3960 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) {
3961 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used");
3962 }
3963
3964 #ifndef PRODUCT
3965 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) {
3966 if (use_vm_log()) {
3967 LogVMOutput = true;
3968 }
3969 }
3970 #endif // PRODUCT
3971
3972 if (PrintCommandLineFlags) {
3973 JVMFlag::printSetFlags(tty);
3974 }
3975
3976 // Apply CPU specific policy for the BiasedLocking
3977 if (UseBiasedLocking) {
3978 if (!VM_Version::use_biased_locking() &&
3979 !(FLAG_IS_CMDLINE(UseBiasedLocking))) {
3980 UseBiasedLocking = false;
3981 }
3982 }
3983 #ifdef COMPILER2
3984 if (!UseBiasedLocking) {
3985 UseOptoBiasInlining = false;
3986 }
3987 #endif
3988
3989 #if defined(IA32)
3990 // Only server compiler can optimize safepoints well enough.
3991 if (!is_server_compilation_mode_vm()) {
3992 FLAG_SET_ERGO_IF_DEFAULT(bool, ThreadLocalHandshakes, false);
3993 }
3994 #endif
3995
3996 // ThreadLocalHandshakesConstraintFunc handles the constraints.
3997 if (FLAG_IS_DEFAULT(ThreadLocalHandshakes) || !SafepointMechanism::supports_thread_local_poll()) {
3998 log_debug(ergo)("ThreadLocalHandshakes %s", ThreadLocalHandshakes ? "enabled." : "disabled.");
3999 } else {
4000 log_info(ergo)("ThreadLocalHandshakes %s", ThreadLocalHandshakes ? "enabled." : "disabled.");
4001 }
4002
4003 return JNI_OK;
4004 }
4005
4006 jint Arguments::adjust_after_os() {
4007 if (UseNUMA) {
4008 if (!FLAG_IS_DEFAULT(AllocateHeapAt)) {
4009 FLAG_SET_ERGO(bool, UseNUMA, false);
4010 } else if (UseParallelGC || UseParallelOldGC) {
4011 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) {
4012 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M);
4013 }
4014 }
4015 // UseNUMAInterleaving is set to ON for all collectors and
4016 // platforms when UseNUMA is set to ON. NUMA-aware collectors
4017 // such as the parallel collector for Linux and Solaris will
4018 // interleave old gen and survivor spaces on top of NUMA
4019 // allocation policy for the eden space.
4020 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on
4021 // all platforms and ParallelGC on Windows will interleave all
4022 // of the heap spaces across NUMA nodes.
4023 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) {
4024 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true);
4025 }
4026 }
4027 return JNI_OK;
4028 }
4029
4030 int Arguments::PropertyList_count(SystemProperty* pl) {
4031 int count = 0;
4032 while(pl != NULL) {
4033 count++;
4034 pl = pl->next();
4035 }
4036 return count;
4037 }
4038
4039 // Return the number of readable properties.
4040 int Arguments::PropertyList_readable_count(SystemProperty* pl) {
4041 int count = 0;
4042 while(pl != NULL) {
4043 if (pl->is_readable()) {
4044 count++;
4045 }
4046 pl = pl->next();
4047 }
4048 return count;
4049 }
4050
4051 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) {
4052 assert(key != NULL, "just checking");
4053 SystemProperty* prop;
4054 for (prop = pl; prop != NULL; prop = prop->next()) {
4055 if (strcmp(key, prop->key()) == 0) return prop->value();
4056 }
4057 return NULL;
4058 }
4059
4060 // Return the value of the requested property provided that it is a readable property.
4061 const char* Arguments::PropertyList_get_readable_value(SystemProperty *pl, const char* key) {
4062 assert(key != NULL, "just checking");
4063 SystemProperty* prop;
4064 // Return the property value if the keys match and the property is not internal or
4065 // it's the special internal property "jdk.boot.class.path.append".
4066 for (prop = pl; prop != NULL; prop = prop->next()) {
4067 if (strcmp(key, prop->key()) == 0) {
4068 if (!prop->internal()) {
4069 return prop->value();
4070 } else if (strcmp(key, "jdk.boot.class.path.append") == 0) {
4071 return prop->value();
4072 } else {
4073 // Property is internal and not jdk.boot.class.path.append so return NULL.
4074 return NULL;
4075 }
4076 }
4077 }
4078 return NULL;
4079 }
4080
4081 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) {
4082 int count = 0;
4083 const char* ret_val = NULL;
4084
4085 while(pl != NULL) {
4086 if(count >= index) {
4087 ret_val = pl->key();
4088 break;
4089 }
4090 count++;
4091 pl = pl->next();
4092 }
4093
4094 return ret_val;
4095 }
4096
4097 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) {
4098 int count = 0;
4099 char* ret_val = NULL;
4100
4101 while(pl != NULL) {
4102 if(count >= index) {
4103 ret_val = pl->value();
4104 break;
4105 }
4106 count++;
4107 pl = pl->next();
4108 }
4109
4110 return ret_val;
4111 }
4112
4113 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) {
4114 SystemProperty* p = *plist;
4115 if (p == NULL) {
4116 *plist = new_p;
4117 } else {
4118 while (p->next() != NULL) {
4119 p = p->next();
4120 }
4121 p->set_next(new_p);
4122 }
4123 }
4124
4125 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v,
4126 bool writeable, bool internal) {
4127 if (plist == NULL)
4128 return;
4129
4130 SystemProperty* new_p = new SystemProperty(k, v, writeable, internal);
4131 PropertyList_add(plist, new_p);
4132 }
4133
4134 void Arguments::PropertyList_add(SystemProperty *element) {
4135 PropertyList_add(&_system_properties, element);
4136 }
4137
4138 // This add maintains unique property key in the list.
4139 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v,
4140 PropertyAppendable append, PropertyWriteable writeable,
4141 PropertyInternal internal) {
4142 if (plist == NULL)
4143 return;
4144
4145 // If property key exist then update with new value.
4146 SystemProperty* prop;
4147 for (prop = *plist; prop != NULL; prop = prop->next()) {
4148 if (strcmp(k, prop->key()) == 0) {
4149 if (append == AppendProperty) {
4150 prop->append_value(v);
4151 } else {
4152 prop->set_value(v);
4153 }
4154 return;
4155 }
4156 }
4157
4158 PropertyList_add(plist, k, v, writeable == WriteableProperty, internal == InternalProperty);
4159 }
4160
4161 // Copies src into buf, replacing "%%" with "%" and "%p" with pid
4162 // Returns true if all of the source pointed by src has been copied over to
4163 // the destination buffer pointed by buf. Otherwise, returns false.
4164 // Notes:
4165 // 1. If the length (buflen) of the destination buffer excluding the
4166 // NULL terminator character is not long enough for holding the expanded
4167 // pid characters, it also returns false instead of returning the partially
4168 // expanded one.
4169 // 2. The passed in "buflen" should be large enough to hold the null terminator.
4170 bool Arguments::copy_expand_pid(const char* src, size_t srclen,
4171 char* buf, size_t buflen) {
4172 const char* p = src;
4173 char* b = buf;
4174 const char* src_end = &src[srclen];
4175 char* buf_end = &buf[buflen - 1];
4176
4177 while (p < src_end && b < buf_end) {
4178 if (*p == '%') {
4179 switch (*(++p)) {
4180 case '%': // "%%" ==> "%"
4181 *b++ = *p++;
4182 break;
4183 case 'p': { // "%p" ==> current process id
4184 // buf_end points to the character before the last character so
4185 // that we could write '\0' to the end of the buffer.
4186 size_t buf_sz = buf_end - b + 1;
4187 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id());
4188
4189 // if jio_snprintf fails or the buffer is not long enough to hold
4190 // the expanded pid, returns false.
4191 if (ret < 0 || ret >= (int)buf_sz) {
4192 return false;
4193 } else {
4194 b += ret;
4195 assert(*b == '\0', "fail in copy_expand_pid");
4196 if (p == src_end && b == buf_end + 1) {
4197 // reach the end of the buffer.
4198 return true;
4199 }
4200 }
4201 p++;
4202 break;
4203 }
4204 default :
4205 *b++ = '%';
4206 }
4207 } else {
4208 *b++ = *p++;
4209 }
4210 }
4211 *b = '\0';
4212 return (p == src_end); // return false if not all of the source was copied
4213 }