1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "classfile/classLoader.hpp"
28 #include "classfile/javaAssertions.hpp"
29 #include "classfile/moduleEntry.hpp"
30 #include "classfile/stringTable.hpp"
31 #include "classfile/symbolTable.hpp"
32 #include "gc/shared/collectorPolicy.hpp"
33 #include "gc/shared/gcArguments.hpp"
34 #include "gc/shared/gcConfig.hpp"
35 #include "logging/log.hpp"
36 #include "logging/logConfiguration.hpp"
37 #include "logging/logStream.hpp"
38 #include "logging/logTag.hpp"
39 #include "memory/allocation.inline.hpp"
40 #include "memory/universe.hpp"
41 #include "oops/oop.inline.hpp"
42 #include "prims/jvmtiExport.hpp"
43 #include "runtime/arguments.hpp"
44 #include "runtime/arguments_ext.hpp"
45 #include "runtime/flags/jvmFlag.hpp"
46 #include "runtime/flags/jvmFlagConstraintList.hpp"
47 #include "runtime/flags/jvmFlagWriteableList.hpp"
48 #include "runtime/flags/jvmFlagRangeList.hpp"
49 #include "runtime/globals_extension.hpp"
50 #include "runtime/java.hpp"
51 #include "runtime/os.inline.hpp"
52 #include "runtime/safepoint.hpp"
53 #include "runtime/safepointMechanism.hpp"
54 #include "runtime/vm_version.hpp"
55 #include "services/management.hpp"
56 #include "services/memTracker.hpp"
57 #include "utilities/align.hpp"
58 #include "utilities/defaultStream.hpp"
59 #include "utilities/macros.hpp"
60 #include "utilities/stringUtils.hpp"
61 #if INCLUDE_JVMCI
62 #include "jvmci/jvmciRuntime.hpp"
63 #endif
64 #if INCLUDE_JFR
65 #include "jfr/jfr.hpp"
66 #endif
67
68 // Note: This is a special bug reporting site for the JVM
69 #ifdef VENDOR_URL_VM_BUG
70 # define DEFAULT_VENDOR_URL_BUG VENDOR_URL_VM_BUG
71 #else
72 # define DEFAULT_VENDOR_URL_BUG "http://bugreport.java.com/bugreport/crash.jsp"
73 #endif
74 #define DEFAULT_JAVA_LAUNCHER "generic"
75
76 char* Arguments::_jvm_flags_file = NULL;
77 char** Arguments::_jvm_flags_array = NULL;
78 int Arguments::_num_jvm_flags = 0;
79 char** Arguments::_jvm_args_array = NULL;
80 int Arguments::_num_jvm_args = 0;
81 char* Arguments::_java_command = NULL;
82 SystemProperty* Arguments::_system_properties = NULL;
83 const char* Arguments::_gc_log_filename = NULL;
84 size_t Arguments::_conservative_max_heap_alignment = 0;
85 size_t Arguments::_min_heap_size = 0;
86 Arguments::Mode Arguments::_mode = _mixed;
87 bool Arguments::_java_compiler = false;
88 bool Arguments::_xdebug_mode = false;
89 const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG;
90 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER;
91 int Arguments::_sun_java_launcher_pid = -1;
92 bool Arguments::_sun_java_launcher_is_altjvm = false;
93
94 // These parameters are reset in method parse_vm_init_args()
95 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
96 bool Arguments::_UseOnStackReplacement = UseOnStackReplacement;
97 bool Arguments::_BackgroundCompilation = BackgroundCompilation;
98 bool Arguments::_ClipInlining = ClipInlining;
99 intx Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
100 intx Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
101
102 bool Arguments::_enable_preview = false;
103
104 char* Arguments::SharedArchivePath = NULL;
105
106 AgentLibraryList Arguments::_libraryList;
107 AgentLibraryList Arguments::_agentList;
108
109 abort_hook_t Arguments::_abort_hook = NULL;
110 exit_hook_t Arguments::_exit_hook = NULL;
111 vfprintf_hook_t Arguments::_vfprintf_hook = NULL;
112
113
114 SystemProperty *Arguments::_sun_boot_library_path = NULL;
115 SystemProperty *Arguments::_java_library_path = NULL;
116 SystemProperty *Arguments::_java_home = NULL;
117 SystemProperty *Arguments::_java_class_path = NULL;
118 SystemProperty *Arguments::_jdk_boot_class_path_append = NULL;
119 SystemProperty *Arguments::_vm_info = NULL;
120
121 GrowableArray<ModulePatchPath*> *Arguments::_patch_mod_prefix = NULL;
122 PathString *Arguments::_system_boot_class_path = NULL;
123 bool Arguments::_has_jimage = false;
124
125 char* Arguments::_ext_dirs = NULL;
126
127 bool PathString::set_value(const char *value) {
128 if (_value != NULL) {
129 FreeHeap(_value);
130 }
131 _value = AllocateHeap(strlen(value)+1, mtArguments);
132 assert(_value != NULL, "Unable to allocate space for new path value");
133 if (_value != NULL) {
134 strcpy(_value, value);
135 } else {
136 // not able to allocate
137 return false;
138 }
139 return true;
140 }
141
142 void PathString::append_value(const char *value) {
143 char *sp;
144 size_t len = 0;
145 if (value != NULL) {
146 len = strlen(value);
147 if (_value != NULL) {
148 len += strlen(_value);
149 }
150 sp = AllocateHeap(len+2, mtArguments);
151 assert(sp != NULL, "Unable to allocate space for new append path value");
152 if (sp != NULL) {
153 if (_value != NULL) {
154 strcpy(sp, _value);
155 strcat(sp, os::path_separator());
156 strcat(sp, value);
157 FreeHeap(_value);
158 } else {
159 strcpy(sp, value);
160 }
161 _value = sp;
162 }
163 }
164 }
165
166 PathString::PathString(const char* value) {
167 if (value == NULL) {
168 _value = NULL;
169 } else {
170 _value = AllocateHeap(strlen(value)+1, mtArguments);
171 strcpy(_value, value);
172 }
173 }
174
175 PathString::~PathString() {
176 if (_value != NULL) {
177 FreeHeap(_value);
178 _value = NULL;
179 }
180 }
181
182 ModulePatchPath::ModulePatchPath(const char* module_name, const char* path) {
183 assert(module_name != NULL && path != NULL, "Invalid module name or path value");
184 size_t len = strlen(module_name) + 1;
185 _module_name = AllocateHeap(len, mtInternal);
186 strncpy(_module_name, module_name, len); // copy the trailing null
187 _path = new PathString(path);
188 }
189
190 ModulePatchPath::~ModulePatchPath() {
191 if (_module_name != NULL) {
192 FreeHeap(_module_name);
193 _module_name = NULL;
194 }
195 if (_path != NULL) {
196 delete _path;
197 _path = NULL;
198 }
199 }
200
201 SystemProperty::SystemProperty(const char* key, const char* value, bool writeable, bool internal) : PathString(value) {
202 if (key == NULL) {
203 _key = NULL;
204 } else {
205 _key = AllocateHeap(strlen(key)+1, mtArguments);
206 strcpy(_key, key);
207 }
208 _next = NULL;
209 _internal = internal;
210 _writeable = writeable;
211 }
212
213 AgentLibrary::AgentLibrary(const char* name, const char* options,
214 bool is_absolute_path, void* os_lib,
215 bool instrument_lib) {
216 _name = AllocateHeap(strlen(name)+1, mtArguments);
217 strcpy(_name, name);
218 if (options == NULL) {
219 _options = NULL;
220 } else {
221 _options = AllocateHeap(strlen(options)+1, mtArguments);
222 strcpy(_options, options);
223 }
224 _is_absolute_path = is_absolute_path;
225 _os_lib = os_lib;
226 _next = NULL;
227 _state = agent_invalid;
228 _is_static_lib = false;
229 _is_instrument_lib = instrument_lib;
230 }
231
232 // Check if head of 'option' matches 'name', and sets 'tail' to the remaining
233 // part of the option string.
234 static bool match_option(const JavaVMOption *option, const char* name,
235 const char** tail) {
236 size_t len = strlen(name);
237 if (strncmp(option->optionString, name, len) == 0) {
238 *tail = option->optionString + len;
239 return true;
240 } else {
241 return false;
242 }
243 }
244
245 // Check if 'option' matches 'name'. No "tail" is allowed.
246 static bool match_option(const JavaVMOption *option, const char* name) {
247 const char* tail = NULL;
248 bool result = match_option(option, name, &tail);
249 if (tail != NULL && *tail == '\0') {
250 return result;
251 } else {
252 return false;
253 }
254 }
255
256 // Return true if any of the strings in null-terminated array 'names' matches.
257 // If tail_allowed is true, then the tail must begin with a colon; otherwise,
258 // the option must match exactly.
259 static bool match_option(const JavaVMOption* option, const char** names, const char** tail,
260 bool tail_allowed) {
261 for (/* empty */; *names != NULL; ++names) {
262 if (match_option(option, *names, tail)) {
263 if (**tail == '\0' || (tail_allowed && **tail == ':')) {
264 return true;
265 }
266 }
267 }
268 return false;
269 }
270
271 #if INCLUDE_JFR
272 // return true on failure
273 static bool match_jfr_option(const JavaVMOption** option) {
274 assert((*option)->optionString != NULL, "invariant");
275 char* tail = NULL;
276 if (match_option(*option, "-XX:StartFlightRecording", (const char**)&tail)) {
277 return Jfr::on_start_flight_recording_option(option, tail);
278 } else if (match_option(*option, "-XX:FlightRecorderOptions", (const char**)&tail)) {
279 return Jfr::on_flight_recorder_option(option, tail);
280 }
281 return false;
282 }
283 #endif
284
285 static void logOption(const char* opt) {
286 if (PrintVMOptions) {
287 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt);
288 }
289 }
290
291 bool needs_module_property_warning = false;
292
293 #define MODULE_PROPERTY_PREFIX "jdk.module."
294 #define MODULE_PROPERTY_PREFIX_LEN 11
295 #define ADDEXPORTS "addexports"
296 #define ADDEXPORTS_LEN 10
297 #define ADDREADS "addreads"
298 #define ADDREADS_LEN 8
299 #define ADDOPENS "addopens"
300 #define ADDOPENS_LEN 8
301 #define PATCH "patch"
302 #define PATCH_LEN 5
303 #define ADDMODS "addmods"
304 #define ADDMODS_LEN 7
305 #define LIMITMODS "limitmods"
306 #define LIMITMODS_LEN 9
307 #define PATH "path"
308 #define PATH_LEN 4
309 #define UPGRADE_PATH "upgrade.path"
310 #define UPGRADE_PATH_LEN 12
311
312 void Arguments::add_init_library(const char* name, char* options) {
313 _libraryList.add(new AgentLibrary(name, options, false, NULL));
314 }
315
316 void Arguments::add_init_agent(const char* name, char* options, bool absolute_path) {
317 _agentList.add(new AgentLibrary(name, options, absolute_path, NULL));
318 }
319
320 void Arguments::add_instrument_agent(const char* name, char* options, bool absolute_path) {
321 _agentList.add(new AgentLibrary(name, options, absolute_path, NULL, true));
322 }
323
324 // Late-binding agents not started via arguments
325 void Arguments::add_loaded_agent(AgentLibrary *agentLib) {
326 _agentList.add(agentLib);
327 }
328
329 void Arguments::add_loaded_agent(const char* name, char* options, bool absolute_path, void* os_lib) {
330 _agentList.add(new AgentLibrary(name, options, absolute_path, os_lib));
331 }
332
333 // Return TRUE if option matches 'property', or 'property=', or 'property.'.
334 static bool matches_property_suffix(const char* option, const char* property, size_t len) {
335 return ((strncmp(option, property, len) == 0) &&
336 (option[len] == '=' || option[len] == '.' || option[len] == '\0'));
337 }
338
339 // Return true if property starts with "jdk.module." and its ensuing chars match
340 // any of the reserved module properties.
341 // property should be passed without the leading "-D".
342 bool Arguments::is_internal_module_property(const char* property) {
343 assert((strncmp(property, "-D", 2) != 0), "Unexpected leading -D");
344 if (strncmp(property, MODULE_PROPERTY_PREFIX, MODULE_PROPERTY_PREFIX_LEN) == 0) {
345 const char* property_suffix = property + MODULE_PROPERTY_PREFIX_LEN;
346 if (matches_property_suffix(property_suffix, ADDEXPORTS, ADDEXPORTS_LEN) ||
347 matches_property_suffix(property_suffix, ADDREADS, ADDREADS_LEN) ||
348 matches_property_suffix(property_suffix, ADDOPENS, ADDOPENS_LEN) ||
349 matches_property_suffix(property_suffix, PATCH, PATCH_LEN) ||
350 matches_property_suffix(property_suffix, ADDMODS, ADDMODS_LEN) ||
351 matches_property_suffix(property_suffix, LIMITMODS, LIMITMODS_LEN) ||
352 matches_property_suffix(property_suffix, PATH, PATH_LEN) ||
353 matches_property_suffix(property_suffix, UPGRADE_PATH, UPGRADE_PATH_LEN)) {
354 return true;
355 }
356 }
357 return false;
358 }
359
360 // Process java launcher properties.
361 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) {
362 // See if sun.java.launcher, sun.java.launcher.is_altjvm or
363 // sun.java.launcher.pid is defined.
364 // Must do this before setting up other system properties,
365 // as some of them may depend on launcher type.
366 for (int index = 0; index < args->nOptions; index++) {
367 const JavaVMOption* option = args->options + index;
368 const char* tail;
369
370 if (match_option(option, "-Dsun.java.launcher=", &tail)) {
371 process_java_launcher_argument(tail, option->extraInfo);
372 continue;
373 }
374 if (match_option(option, "-Dsun.java.launcher.is_altjvm=", &tail)) {
375 if (strcmp(tail, "true") == 0) {
376 _sun_java_launcher_is_altjvm = true;
377 }
378 continue;
379 }
380 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) {
381 _sun_java_launcher_pid = atoi(tail);
382 continue;
383 }
384 }
385 }
386
387 // Initialize system properties key and value.
388 void Arguments::init_system_properties() {
389
390 // Set up _system_boot_class_path which is not a property but
391 // relies heavily on argument processing and the jdk.boot.class.path.append
392 // property. It is used to store the underlying system boot class path.
393 _system_boot_class_path = new PathString(NULL);
394
395 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name",
396 "Java Virtual Machine Specification", false));
397 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false));
398 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false));
399 PropertyList_add(&_system_properties, new SystemProperty("jdk.debug", VM_Version::jdk_debug_level(), false));
400
401 // Initialize the vm.info now, but it will need updating after argument parsing.
402 _vm_info = new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true);
403
404 // Following are JVMTI agent writable properties.
405 // Properties values are set to NULL and they are
406 // os specific they are initialized in os::init_system_properties_values().
407 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true);
408 _java_library_path = new SystemProperty("java.library.path", NULL, true);
409 _java_home = new SystemProperty("java.home", NULL, true);
410 _java_class_path = new SystemProperty("java.class.path", "", true);
411 // jdk.boot.class.path.append is a non-writeable, internal property.
412 // It can only be set by either:
413 // - -Xbootclasspath/a:
414 // - AddToBootstrapClassLoaderSearch during JVMTI OnLoad phase
415 _jdk_boot_class_path_append = new SystemProperty("jdk.boot.class.path.append", "", false, true);
416
417 // Add to System Property list.
418 PropertyList_add(&_system_properties, _sun_boot_library_path);
419 PropertyList_add(&_system_properties, _java_library_path);
420 PropertyList_add(&_system_properties, _java_home);
421 PropertyList_add(&_system_properties, _java_class_path);
422 PropertyList_add(&_system_properties, _jdk_boot_class_path_append);
423 PropertyList_add(&_system_properties, _vm_info);
424
425 // Set OS specific system properties values
426 os::init_system_properties_values();
427 }
428
429 // Update/Initialize System properties after JDK version number is known
430 void Arguments::init_version_specific_system_properties() {
431 enum { bufsz = 16 };
432 char buffer[bufsz];
433 const char* spec_vendor = "Oracle Corporation";
434 uint32_t spec_version = JDK_Version::current().major_version();
435
436 jio_snprintf(buffer, bufsz, UINT32_FORMAT, spec_version);
437
438 PropertyList_add(&_system_properties,
439 new SystemProperty("java.vm.specification.vendor", spec_vendor, false));
440 PropertyList_add(&_system_properties,
441 new SystemProperty("java.vm.specification.version", buffer, false));
442 PropertyList_add(&_system_properties,
443 new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false));
444 }
445
446 /*
447 * -XX argument processing:
448 *
449 * -XX arguments are defined in several places, such as:
450 * globals.hpp, globals_<cpu>.hpp, globals_<os>.hpp, <compiler>_globals.hpp, or <gc>_globals.hpp.
451 * -XX arguments are parsed in parse_argument().
452 * -XX argument bounds checking is done in check_vm_args_consistency().
453 *
454 * Over time -XX arguments may change. There are mechanisms to handle common cases:
455 *
456 * ALIASED: An option that is simply another name for another option. This is often
457 * part of the process of deprecating a flag, but not all aliases need
458 * to be deprecated.
459 *
460 * Create an alias for an option by adding the old and new option names to the
461 * "aliased_jvm_flags" table. Delete the old variable from globals.hpp (etc).
462 *
463 * DEPRECATED: An option that is supported, but a warning is printed to let the user know that
464 * support may be removed in the future. Both regular and aliased options may be
465 * deprecated.
466 *
467 * Add a deprecation warning for an option (or alias) by adding an entry in the
468 * "special_jvm_flags" table and setting the "deprecated_in" field.
469 * Often an option "deprecated" in one major release will
470 * be made "obsolete" in the next. In this case the entry should also have its
471 * "obsolete_in" field set.
472 *
473 * OBSOLETE: An option that has been removed (and deleted from globals.hpp), but is still accepted
474 * on the command line. A warning is printed to let the user know that option might not
475 * be accepted in the future.
476 *
477 * Add an obsolete warning for an option by adding an entry in the "special_jvm_flags"
478 * table and setting the "obsolete_in" field.
479 *
480 * EXPIRED: A deprecated or obsolete option that has an "accept_until" version less than or equal
481 * to the current JDK version. The system will flatly refuse to admit the existence of
482 * the flag. This allows a flag to die automatically over JDK releases.
483 *
484 * Note that manual cleanup of expired options should be done at major JDK version upgrades:
485 * - Newly expired options should be removed from the special_jvm_flags and aliased_jvm_flags tables.
486 * - Newly obsolete or expired deprecated options should have their global variable
487 * definitions removed (from globals.hpp, etc) and related implementations removed.
488 *
489 * Recommended approach for removing options:
490 *
491 * To remove options commonly used by customers (e.g. product -XX options), use
492 * the 3-step model adding major release numbers to the deprecate, obsolete and expire columns.
493 *
494 * To remove internal options (e.g. diagnostic, experimental, develop options), use
495 * a 2-step model adding major release numbers to the obsolete and expire columns.
496 *
497 * To change the name of an option, use the alias table as well as a 2-step
498 * model adding major release numbers to the deprecate and expire columns.
499 * Think twice about aliasing commonly used customer options.
500 *
501 * There are times when it is appropriate to leave a future release number as undefined.
502 *
503 * Tests: Aliases should be tested in VMAliasOptions.java.
504 * Deprecated options should be tested in VMDeprecatedOptions.java.
505 */
506
507 // The special_jvm_flags table declares options that are being deprecated and/or obsoleted. The
508 // "deprecated_in" or "obsolete_in" fields may be set to "undefined", but not both.
509 // When the JDK version reaches 'deprecated_in' limit, the JVM will process this flag on
510 // the command-line as usual, but will issue a warning.
511 // When the JDK version reaches 'obsolete_in' limit, the JVM will continue accepting this flag on
512 // the command-line, while issuing a warning and ignoring the flag value.
513 // Once the JDK version reaches 'expired_in' limit, the JVM will flatly refuse to admit the
514 // existence of the flag.
515 //
516 // MANUAL CLEANUP ON JDK VERSION UPDATES:
517 // This table ensures that the handling of options will update automatically when the JDK
518 // version is incremented, but the source code needs to be cleanup up manually:
519 // - As "deprecated" options age into "obsolete" or "expired" options, the associated "globals"
520 // variable should be removed, as well as users of the variable.
521 // - As "deprecated" options age into "obsolete" options, move the entry into the
522 // "Obsolete Flags" section of the table.
523 // - All expired options should be removed from the table.
524 static SpecialFlag const special_jvm_flags[] = {
525 // -------------- Deprecated Flags --------------
526 // --- Non-alias flags - sorted by obsolete_in then expired_in:
527 { "MaxGCMinorPauseMillis", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() },
528 { "UseConcMarkSweepGC", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
529 { "AssumeMP", JDK_Version::jdk(10),JDK_Version::undefined(), JDK_Version::undefined() },
530 { "MonitorInUseLists", JDK_Version::jdk(10),JDK_Version::undefined(), JDK_Version::undefined() },
531 { "MaxRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
532 { "MinRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
533 { "InitialRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
534 { "UseMembar", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
535 { "IgnoreUnverifiableClassesDuringDump", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
536 { "CompilerThreadHintNoPreempt", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
537 { "VMThreadHintNoPreempt", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
538 { "AggressiveOpts", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
539
540 // --- Deprecated alias flags (see also aliased_jvm_flags) - sorted by obsolete_in then expired_in:
541 { "DefaultMaxRAMFraction", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() },
542 { "CreateMinidumpOnCrash", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
543 { "MustCallLoadClassInternal", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
544 { "UnsyncloadClass", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
545
546 // -------------- Obsolete Flags - sorted by expired_in --------------
547 { "CheckAssertionStatusDirectives",JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
548 { "PrintMallocFree", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
549 { "PrintMalloc", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
550 { "ShowSafepointMsgs", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
551 { "FastTLABRefill", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
552 { "SafepointSpinBeforeYield", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
553 { "CheckEndorsedAndExtDirs", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
554 { "DeferThrSuspendLoopCount", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
555 { "DeferPollingPageLoopCount", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
556 { "TraceScavenge", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
557 { "PermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::undefined() },
558 { "MaxPermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::undefined() },
559 { "SharedReadWriteSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() },
560 { "SharedReadOnlySize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() },
561 { "SharedMiscDataSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() },
562 { "SharedMiscCodeSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() },
563 { "UseUTCFileTimestamp", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
564 { "InlineNotify", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
565 { "EnableTracing", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
566 { "UseLockedTracing", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
567 { "NativeMonitorTimeout", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
568 { "NativeMonitorSpinLimit", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
569 { "NativeMonitorFlags", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
570 { "UnlinkSymbolsALot", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
571 { "AllowNonVirtualCalls", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
572 { "PrintSafepointStatistics", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
573 { "PrintSafepointStatisticsTimeout",JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
574 { "PrintSafepointStatisticsCount", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
575 { "TransmitErrorReport", JDK_Version::undefined(), JDK_Version::jdk(12), JDK_Version::jdk(13) },
576 { "ErrorReportServer", JDK_Version::undefined(), JDK_Version::jdk(12), JDK_Version::jdk(13) },
577
578 #ifdef TEST_VERIFY_SPECIAL_JVM_FLAGS
579 { "dep > obs", JDK_Version::jdk(9), JDK_Version::jdk(8), JDK_Version::undefined() },
580 { "dep > exp ", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(8) },
581 { "obs > exp ", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(8) },
582 { "not deprecated or obsolete", JDK_Version::undefined(), JDK_Version::undefined(), JDK_Version::jdk(9) },
583 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
584 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
585 { "BytecodeVerificationRemote", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::undefined() },
586 #endif
587
588 { NULL, JDK_Version(0), JDK_Version(0) }
589 };
590
591 // Flags that are aliases for other flags.
592 typedef struct {
593 const char* alias_name;
594 const char* real_name;
595 } AliasedFlag;
596
597 static AliasedFlag const aliased_jvm_flags[] = {
598 { "DefaultMaxRAMFraction", "MaxRAMFraction" },
599 { "CreateMinidumpOnCrash", "CreateCoredumpOnCrash" },
600 { NULL, NULL}
601 };
602
603 // NOTE: A compatibility request will be necessary for each alias to be removed.
604 static AliasedLoggingFlag const aliased_logging_flags[] = {
605 { "PrintCompressedOopsMode", LogLevel::Info, true, LOG_TAGS(gc, heap, coops) },
606 { "PrintSharedSpaces", LogLevel::Info, true, LOG_TAGS(cds) },
607 { "TraceBiasedLocking", LogLevel::Info, true, LOG_TAGS(biasedlocking) },
608 { "TraceClassLoading", LogLevel::Info, true, LOG_TAGS(class, load) },
609 { "TraceClassLoadingPreorder", LogLevel::Debug, true, LOG_TAGS(class, preorder) },
610 { "TraceClassPaths", LogLevel::Info, true, LOG_TAGS(class, path) },
611 { "TraceClassResolution", LogLevel::Debug, true, LOG_TAGS(class, resolve) },
612 { "TraceClassUnloading", LogLevel::Info, true, LOG_TAGS(class, unload) },
613 { "TraceExceptions", LogLevel::Info, true, LOG_TAGS(exceptions) },
614 { "TraceLoaderConstraints", LogLevel::Info, true, LOG_TAGS(class, loader, constraints) },
615 { "TraceMonitorInflation", LogLevel::Debug, true, LOG_TAGS(monitorinflation) },
616 { "TraceSafepointCleanupTime", LogLevel::Info, true, LOG_TAGS(safepoint, cleanup) },
617 { "TraceJVMTIObjectTagging", LogLevel::Debug, true, LOG_TAGS(jvmti, objecttagging) },
618 { "TraceRedefineClasses", LogLevel::Info, false, LOG_TAGS(redefine, class) },
619 { NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG) }
620 };
621
622 #ifndef PRODUCT
623 // These options are removed in jdk9. Remove this code for jdk10.
624 static AliasedFlag const removed_develop_logging_flags[] = {
625 { "TraceClassInitialization", "-Xlog:class+init" },
626 { "TraceClassLoaderData", "-Xlog:class+loader+data" },
627 { "TraceDefaultMethods", "-Xlog:defaultmethods=debug" },
628 { "TraceItables", "-Xlog:itables=debug" },
629 { "TraceMonitorMismatch", "-Xlog:monitormismatch=info" },
630 { "TraceSafepoint", "-Xlog:safepoint=debug" },
631 { "TraceStartupTime", "-Xlog:startuptime" },
632 { "TraceVMOperation", "-Xlog:vmoperation=debug" },
633 { "PrintVtables", "-Xlog:vtables=debug" },
634 { "VerboseVerification", "-Xlog:verification" },
635 { NULL, NULL }
636 };
637 #endif //PRODUCT
638
639 // Return true if "v" is less than "other", where "other" may be "undefined".
640 static bool version_less_than(JDK_Version v, JDK_Version other) {
641 assert(!v.is_undefined(), "must be defined");
642 if (!other.is_undefined() && v.compare(other) >= 0) {
643 return false;
644 } else {
645 return true;
646 }
647 }
648
649 extern bool lookup_special_flag_ext(const char *flag_name, SpecialFlag& flag);
650
651 static bool lookup_special_flag(const char *flag_name, SpecialFlag& flag) {
652 // Allow extensions to have priority
653 if (lookup_special_flag_ext(flag_name, flag)) {
654 return true;
655 }
656
657 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
658 if ((strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
659 flag = special_jvm_flags[i];
660 return true;
661 }
662 }
663 return false;
664 }
665
666 bool Arguments::is_obsolete_flag(const char *flag_name, JDK_Version* version) {
667 assert(version != NULL, "Must provide a version buffer");
668 SpecialFlag flag;
669 if (lookup_special_flag(flag_name, flag)) {
670 if (!flag.obsolete_in.is_undefined()) {
671 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) {
672 *version = flag.obsolete_in;
673 return true;
674 }
675 }
676 }
677 return false;
678 }
679
680 int Arguments::is_deprecated_flag(const char *flag_name, JDK_Version* version) {
681 assert(version != NULL, "Must provide a version buffer");
682 SpecialFlag flag;
683 if (lookup_special_flag(flag_name, flag)) {
684 if (!flag.deprecated_in.is_undefined()) {
685 if (version_less_than(JDK_Version::current(), flag.obsolete_in) &&
686 version_less_than(JDK_Version::current(), flag.expired_in)) {
687 *version = flag.deprecated_in;
688 return 1;
689 } else {
690 return -1;
691 }
692 }
693 }
694 return 0;
695 }
696
697 #ifndef PRODUCT
698 const char* Arguments::removed_develop_logging_flag_name(const char* name){
699 for (size_t i = 0; removed_develop_logging_flags[i].alias_name != NULL; i++) {
700 const AliasedFlag& flag = removed_develop_logging_flags[i];
701 if (strcmp(flag.alias_name, name) == 0) {
702 return flag.real_name;
703 }
704 }
705 return NULL;
706 }
707 #endif // PRODUCT
708
709 const char* Arguments::real_flag_name(const char *flag_name) {
710 for (size_t i = 0; aliased_jvm_flags[i].alias_name != NULL; i++) {
711 const AliasedFlag& flag_status = aliased_jvm_flags[i];
712 if (strcmp(flag_status.alias_name, flag_name) == 0) {
713 return flag_status.real_name;
714 }
715 }
716 return flag_name;
717 }
718
719 #ifdef ASSERT
720 static bool lookup_special_flag(const char *flag_name, size_t skip_index) {
721 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
722 if ((i != skip_index) && (strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
723 return true;
724 }
725 }
726 return false;
727 }
728
729 // Verifies the correctness of the entries in the special_jvm_flags table.
730 // If there is a semantic error (i.e. a bug in the table) such as the obsoletion
731 // version being earlier than the deprecation version, then a warning is issued
732 // and verification fails - by returning false. If it is detected that the table
733 // is out of date, with respect to the current version, then a warning is issued
734 // but verification does not fail. This allows the VM to operate when the version
735 // is first updated, without needing to update all the impacted flags at the
736 // same time.
737 static bool verify_special_jvm_flags() {
738 bool success = true;
739 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
740 const SpecialFlag& flag = special_jvm_flags[i];
741 if (lookup_special_flag(flag.name, i)) {
742 warning("Duplicate special flag declaration \"%s\"", flag.name);
743 success = false;
744 }
745 if (flag.deprecated_in.is_undefined() &&
746 flag.obsolete_in.is_undefined()) {
747 warning("Special flag entry \"%s\" must declare version deprecated and/or obsoleted in.", flag.name);
748 success = false;
749 }
750
751 if (!flag.deprecated_in.is_undefined()) {
752 if (!version_less_than(flag.deprecated_in, flag.obsolete_in)) {
753 warning("Special flag entry \"%s\" must be deprecated before obsoleted.", flag.name);
754 success = false;
755 }
756
757 if (!version_less_than(flag.deprecated_in, flag.expired_in)) {
758 warning("Special flag entry \"%s\" must be deprecated before expired.", flag.name);
759 success = false;
760 }
761 }
762
763 if (!flag.obsolete_in.is_undefined()) {
764 if (!version_less_than(flag.obsolete_in, flag.expired_in)) {
765 warning("Special flag entry \"%s\" must be obsoleted before expired.", flag.name);
766 success = false;
767 }
768
769 // if flag has become obsolete it should not have a "globals" flag defined anymore.
770 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) {
771 if (JVMFlag::find_flag(flag.name) != NULL) {
772 // Temporarily disable the warning: 8196739
773 // warning("Global variable for obsolete special flag entry \"%s\" should be removed", flag.name);
774 }
775 }
776 }
777
778 if (!flag.expired_in.is_undefined()) {
779 // if flag has become expired it should not have a "globals" flag defined anymore.
780 if (!version_less_than(JDK_Version::current(), flag.expired_in)) {
781 if (JVMFlag::find_flag(flag.name) != NULL) {
782 // Temporarily disable the warning: 8196739
783 // warning("Global variable for expired flag entry \"%s\" should be removed", flag.name);
784 }
785 }
786 }
787
788 }
789 return success;
790 }
791 #endif
792
793 // Parses a size specification string.
794 bool Arguments::atojulong(const char *s, julong* result) {
795 julong n = 0;
796
797 // First char must be a digit. Don't allow negative numbers or leading spaces.
798 if (!isdigit(*s)) {
799 return false;
800 }
801
802 bool is_hex = (s[0] == '0' && (s[1] == 'x' || s[1] == 'X'));
803 char* remainder;
804 errno = 0;
805 n = strtoull(s, &remainder, (is_hex ? 16 : 10));
806 if (errno != 0) {
807 return false;
808 }
809
810 // Fail if no number was read at all or if the remainder contains more than a single non-digit character.
811 if (remainder == s || strlen(remainder) > 1) {
812 return false;
813 }
814
815 switch (*remainder) {
816 case 'T': case 't':
817 *result = n * G * K;
818 // Check for overflow.
819 if (*result/((julong)G * K) != n) return false;
820 return true;
821 case 'G': case 'g':
822 *result = n * G;
823 if (*result/G != n) return false;
824 return true;
825 case 'M': case 'm':
826 *result = n * M;
827 if (*result/M != n) return false;
828 return true;
829 case 'K': case 'k':
830 *result = n * K;
831 if (*result/K != n) return false;
832 return true;
833 case '\0':
834 *result = n;
835 return true;
836 default:
837 return false;
838 }
839 }
840
841 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size, julong max_size) {
842 if (size < min_size) return arg_too_small;
843 if (size > max_size) return arg_too_big;
844 return arg_in_range;
845 }
846
847 // Describe an argument out of range error
848 void Arguments::describe_range_error(ArgsRange errcode) {
849 switch(errcode) {
850 case arg_too_big:
851 jio_fprintf(defaultStream::error_stream(),
852 "The specified size exceeds the maximum "
853 "representable size.\n");
854 break;
855 case arg_too_small:
856 case arg_unreadable:
857 case arg_in_range:
858 // do nothing for now
859 break;
860 default:
861 ShouldNotReachHere();
862 }
863 }
864
865 static bool set_bool_flag(const char* name, bool value, JVMFlag::Flags origin) {
866 if (JVMFlag::boolAtPut(name, &value, origin) == JVMFlag::SUCCESS) {
867 return true;
868 } else {
869 return false;
870 }
871 }
872
873 static bool set_fp_numeric_flag(const char* name, char* value, JVMFlag::Flags origin) {
874 char* end;
875 errno = 0;
876 double v = strtod(value, &end);
877 if ((errno != 0) || (*end != 0)) {
878 return false;
879 }
880
881 if (JVMFlag::doubleAtPut(name, &v, origin) == JVMFlag::SUCCESS) {
882 return true;
883 }
884 return false;
885 }
886
887 static bool set_numeric_flag(const char* name, char* value, JVMFlag::Flags origin) {
888 julong v;
889 int int_v;
890 intx intx_v;
891 bool is_neg = false;
892 JVMFlag* result = JVMFlag::find_flag(name, strlen(name));
893
894 if (result == NULL) {
895 return false;
896 }
897
898 // Check the sign first since atojulong() parses only unsigned values.
899 if (*value == '-') {
900 if (!result->is_intx() && !result->is_int()) {
901 return false;
902 }
903 value++;
904 is_neg = true;
905 }
906 if (!Arguments::atojulong(value, &v)) {
907 return false;
908 }
909 if (result->is_int()) {
910 int_v = (int) v;
911 if (is_neg) {
912 int_v = -int_v;
913 }
914 return JVMFlag::intAtPut(result, &int_v, origin) == JVMFlag::SUCCESS;
915 } else if (result->is_uint()) {
916 uint uint_v = (uint) v;
917 return JVMFlag::uintAtPut(result, &uint_v, origin) == JVMFlag::SUCCESS;
918 } else if (result->is_intx()) {
919 intx_v = (intx) v;
920 if (is_neg) {
921 intx_v = -intx_v;
922 }
923 return JVMFlag::intxAtPut(result, &intx_v, origin) == JVMFlag::SUCCESS;
924 } else if (result->is_uintx()) {
925 uintx uintx_v = (uintx) v;
926 return JVMFlag::uintxAtPut(result, &uintx_v, origin) == JVMFlag::SUCCESS;
927 } else if (result->is_uint64_t()) {
928 uint64_t uint64_t_v = (uint64_t) v;
929 return JVMFlag::uint64_tAtPut(result, &uint64_t_v, origin) == JVMFlag::SUCCESS;
930 } else if (result->is_size_t()) {
931 size_t size_t_v = (size_t) v;
932 return JVMFlag::size_tAtPut(result, &size_t_v, origin) == JVMFlag::SUCCESS;
933 } else if (result->is_double()) {
934 double double_v = (double) v;
935 return JVMFlag::doubleAtPut(result, &double_v, origin) == JVMFlag::SUCCESS;
936 } else {
937 return false;
938 }
939 }
940
941 static bool set_string_flag(const char* name, const char* value, JVMFlag::Flags origin) {
942 if (JVMFlag::ccstrAtPut(name, &value, origin) != JVMFlag::SUCCESS) return false;
943 // Contract: JVMFlag always returns a pointer that needs freeing.
944 FREE_C_HEAP_ARRAY(char, value);
945 return true;
946 }
947
948 static bool append_to_string_flag(const char* name, const char* new_value, JVMFlag::Flags origin) {
949 const char* old_value = "";
950 if (JVMFlag::ccstrAt(name, &old_value) != JVMFlag::SUCCESS) return false;
951 size_t old_len = old_value != NULL ? strlen(old_value) : 0;
952 size_t new_len = strlen(new_value);
953 const char* value;
954 char* free_this_too = NULL;
955 if (old_len == 0) {
956 value = new_value;
957 } else if (new_len == 0) {
958 value = old_value;
959 } else {
960 size_t length = old_len + 1 + new_len + 1;
961 char* buf = NEW_C_HEAP_ARRAY(char, length, mtArguments);
962 // each new setting adds another LINE to the switch:
963 jio_snprintf(buf, length, "%s\n%s", old_value, new_value);
964 value = buf;
965 free_this_too = buf;
966 }
967 (void) JVMFlag::ccstrAtPut(name, &value, origin);
968 // JVMFlag always returns a pointer that needs freeing.
969 FREE_C_HEAP_ARRAY(char, value);
970 if (free_this_too != NULL) {
971 // JVMFlag made its own copy, so I must delete my own temp. buffer.
972 FREE_C_HEAP_ARRAY(char, free_this_too);
973 }
974 return true;
975 }
976
977 const char* Arguments::handle_aliases_and_deprecation(const char* arg, bool warn) {
978 const char* real_name = real_flag_name(arg);
979 JDK_Version since = JDK_Version();
980 switch (is_deprecated_flag(arg, &since)) {
981 case -1:
982 return NULL; // obsolete or expired, don't process normally
983 case 0:
984 return real_name;
985 case 1: {
986 if (warn) {
987 char version[256];
988 since.to_string(version, sizeof(version));
989 if (real_name != arg) {
990 warning("Option %s was deprecated in version %s and will likely be removed in a future release. Use option %s instead.",
991 arg, version, real_name);
992 } else {
993 warning("Option %s was deprecated in version %s and will likely be removed in a future release.",
994 arg, version);
995 }
996 }
997 return real_name;
998 }
999 }
1000 ShouldNotReachHere();
1001 return NULL;
1002 }
1003
1004 void log_deprecated_flag(const char* name, bool on, AliasedLoggingFlag alf) {
1005 LogTagType tagSet[] = {alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5};
1006 // Set tagset string buffer at max size of 256, large enough for any alias tagset
1007 const int max_tagset_size = 256;
1008 int max_tagset_len = max_tagset_size - 1;
1009 char tagset_buffer[max_tagset_size];
1010 tagset_buffer[0] = '\0';
1011
1012 // Write tag-set for aliased logging option, in string list form
1013 int max_tags = sizeof(tagSet)/sizeof(tagSet[0]);
1014 for (int i = 0; i < max_tags && tagSet[i] != LogTag::__NO_TAG; i++) {
1015 if (i > 0) {
1016 strncat(tagset_buffer, "+", max_tagset_len - strlen(tagset_buffer));
1017 }
1018 strncat(tagset_buffer, LogTag::name(tagSet[i]), max_tagset_len - strlen(tagset_buffer));
1019 }
1020 if (!alf.exactMatch) {
1021 strncat(tagset_buffer, "*", max_tagset_len - strlen(tagset_buffer));
1022 }
1023 log_warning(arguments)("-XX:%s%s is deprecated. Will use -Xlog:%s=%s instead.",
1024 (on) ? "+" : "-",
1025 name,
1026 tagset_buffer,
1027 (on) ? LogLevel::name(alf.level) : "off");
1028 }
1029
1030 AliasedLoggingFlag Arguments::catch_logging_aliases(const char* name, bool on){
1031 for (size_t i = 0; aliased_logging_flags[i].alias_name != NULL; i++) {
1032 const AliasedLoggingFlag& alf = aliased_logging_flags[i];
1033 if (strcmp(alf.alias_name, name) == 0) {
1034 log_deprecated_flag(name, on, alf);
1035 return alf;
1036 }
1037 }
1038 AliasedLoggingFlag a = {NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG)};
1039 return a;
1040 }
1041
1042 bool Arguments::parse_argument(const char* arg, JVMFlag::Flags origin) {
1043
1044 // range of acceptable characters spelled out for portability reasons
1045 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]"
1046 #define BUFLEN 255
1047 char name[BUFLEN+1];
1048 char dummy;
1049 const char* real_name;
1050 bool warn_if_deprecated = true;
1051
1052 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
1053 AliasedLoggingFlag alf = catch_logging_aliases(name, false);
1054 if (alf.alias_name != NULL){
1055 LogConfiguration::configure_stdout(LogLevel::Off, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
1056 return true;
1057 }
1058 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1059 if (real_name == NULL) {
1060 return false;
1061 }
1062 return set_bool_flag(real_name, false, origin);
1063 }
1064 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
1065 AliasedLoggingFlag alf = catch_logging_aliases(name, true);
1066 if (alf.alias_name != NULL){
1067 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
1068 return true;
1069 }
1070 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1071 if (real_name == NULL) {
1072 return false;
1073 }
1074 return set_bool_flag(real_name, true, origin);
1075 }
1076
1077 char punct;
1078 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') {
1079 const char* value = strchr(arg, '=') + 1;
1080 JVMFlag* flag;
1081
1082 // this scanf pattern matches both strings (handled here) and numbers (handled later))
1083 AliasedLoggingFlag alf = catch_logging_aliases(name, true);
1084 if (alf.alias_name != NULL) {
1085 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
1086 return true;
1087 }
1088 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1089 if (real_name == NULL) {
1090 return false;
1091 }
1092 flag = JVMFlag::find_flag(real_name);
1093 if (flag != NULL && flag->is_ccstr()) {
1094 if (flag->ccstr_accumulates()) {
1095 return append_to_string_flag(real_name, value, origin);
1096 } else {
1097 if (value[0] == '\0') {
1098 value = NULL;
1099 }
1100 return set_string_flag(real_name, value, origin);
1101 }
1102 } else {
1103 warn_if_deprecated = false; // if arg is deprecated, we've already done warning...
1104 }
1105 }
1106
1107 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') {
1108 const char* value = strchr(arg, '=') + 1;
1109 // -XX:Foo:=xxx will reset the string flag to the given value.
1110 if (value[0] == '\0') {
1111 value = NULL;
1112 }
1113 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1114 if (real_name == NULL) {
1115 return false;
1116 }
1117 return set_string_flag(real_name, value, origin);
1118 }
1119
1120 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.eE+]"
1121 #define SIGNED_NUMBER_RANGE "[-0123456789]"
1122 #define NUMBER_RANGE "[0123456789eE+-]"
1123 char value[BUFLEN + 1];
1124 char value2[BUFLEN + 1];
1125 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) {
1126 // Looks like a floating-point number -- try again with more lenient format string
1127 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) {
1128 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1129 if (real_name == NULL) {
1130 return false;
1131 }
1132 return set_fp_numeric_flag(real_name, value, origin);
1133 }
1134 }
1135
1136 #define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]"
1137 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) {
1138 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1139 if (real_name == NULL) {
1140 return false;
1141 }
1142 return set_numeric_flag(real_name, value, origin);
1143 }
1144
1145 return false;
1146 }
1147
1148 void Arguments::add_string(char*** bldarray, int* count, const char* arg) {
1149 assert(bldarray != NULL, "illegal argument");
1150
1151 if (arg == NULL) {
1152 return;
1153 }
1154
1155 int new_count = *count + 1;
1156
1157 // expand the array and add arg to the last element
1158 if (*bldarray == NULL) {
1159 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtArguments);
1160 } else {
1161 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtArguments);
1162 }
1163 (*bldarray)[*count] = os::strdup_check_oom(arg);
1164 *count = new_count;
1165 }
1166
1167 void Arguments::build_jvm_args(const char* arg) {
1168 add_string(&_jvm_args_array, &_num_jvm_args, arg);
1169 }
1170
1171 void Arguments::build_jvm_flags(const char* arg) {
1172 add_string(&_jvm_flags_array, &_num_jvm_flags, arg);
1173 }
1174
1175 // utility function to return a string that concatenates all
1176 // strings in a given char** array
1177 const char* Arguments::build_resource_string(char** args, int count) {
1178 if (args == NULL || count == 0) {
1179 return NULL;
1180 }
1181 size_t length = 0;
1182 for (int i = 0; i < count; i++) {
1183 length += strlen(args[i]) + 1; // add 1 for a space or NULL terminating character
1184 }
1185 char* s = NEW_RESOURCE_ARRAY(char, length);
1186 char* dst = s;
1187 for (int j = 0; j < count; j++) {
1188 size_t offset = strlen(args[j]) + 1; // add 1 for a space or NULL terminating character
1189 jio_snprintf(dst, length, "%s ", args[j]); // jio_snprintf will replace the last space character with NULL character
1190 dst += offset;
1191 length -= offset;
1192 }
1193 return (const char*) s;
1194 }
1195
1196 void Arguments::print_on(outputStream* st) {
1197 st->print_cr("VM Arguments:");
1198 if (num_jvm_flags() > 0) {
1199 st->print("jvm_flags: "); print_jvm_flags_on(st);
1200 st->cr();
1201 }
1202 if (num_jvm_args() > 0) {
1203 st->print("jvm_args: "); print_jvm_args_on(st);
1204 st->cr();
1205 }
1206 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>");
1207 if (_java_class_path != NULL) {
1208 char* path = _java_class_path->value();
1209 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path );
1210 }
1211 st->print_cr("Launcher Type: %s", _sun_java_launcher);
1212 }
1213
1214 void Arguments::print_summary_on(outputStream* st) {
1215 // Print the command line. Environment variables that are helpful for
1216 // reproducing the problem are written later in the hs_err file.
1217 // flags are from setting file
1218 if (num_jvm_flags() > 0) {
1219 st->print_raw("Settings File: ");
1220 print_jvm_flags_on(st);
1221 st->cr();
1222 }
1223 // args are the command line and environment variable arguments.
1224 st->print_raw("Command Line: ");
1225 if (num_jvm_args() > 0) {
1226 print_jvm_args_on(st);
1227 }
1228 // this is the classfile and any arguments to the java program
1229 if (java_command() != NULL) {
1230 st->print("%s", java_command());
1231 }
1232 st->cr();
1233 }
1234
1235 void Arguments::print_jvm_flags_on(outputStream* st) {
1236 if (_num_jvm_flags > 0) {
1237 for (int i=0; i < _num_jvm_flags; i++) {
1238 st->print("%s ", _jvm_flags_array[i]);
1239 }
1240 }
1241 }
1242
1243 void Arguments::print_jvm_args_on(outputStream* st) {
1244 if (_num_jvm_args > 0) {
1245 for (int i=0; i < _num_jvm_args; i++) {
1246 st->print("%s ", _jvm_args_array[i]);
1247 }
1248 }
1249 }
1250
1251 bool Arguments::process_argument(const char* arg,
1252 jboolean ignore_unrecognized,
1253 JVMFlag::Flags origin) {
1254 JDK_Version since = JDK_Version();
1255
1256 if (parse_argument(arg, origin)) {
1257 return true;
1258 }
1259
1260 // Determine if the flag has '+', '-', or '=' characters.
1261 bool has_plus_minus = (*arg == '+' || *arg == '-');
1262 const char* const argname = has_plus_minus ? arg + 1 : arg;
1263
1264 size_t arg_len;
1265 const char* equal_sign = strchr(argname, '=');
1266 if (equal_sign == NULL) {
1267 arg_len = strlen(argname);
1268 } else {
1269 arg_len = equal_sign - argname;
1270 }
1271
1272 // Only make the obsolete check for valid arguments.
1273 if (arg_len <= BUFLEN) {
1274 // Construct a string which consists only of the argument name without '+', '-', or '='.
1275 char stripped_argname[BUFLEN+1]; // +1 for '\0'
1276 jio_snprintf(stripped_argname, arg_len+1, "%s", argname); // +1 for '\0'
1277 if (is_obsolete_flag(stripped_argname, &since)) {
1278 char version[256];
1279 since.to_string(version, sizeof(version));
1280 warning("Ignoring option %s; support was removed in %s", stripped_argname, version);
1281 return true;
1282 }
1283 #ifndef PRODUCT
1284 else {
1285 const char* replacement;
1286 if ((replacement = removed_develop_logging_flag_name(stripped_argname)) != NULL){
1287 log_warning(arguments)("%s has been removed. Please use %s instead.",
1288 stripped_argname,
1289 replacement);
1290 return false;
1291 }
1292 }
1293 #endif //PRODUCT
1294 }
1295
1296 // For locked flags, report a custom error message if available.
1297 // Otherwise, report the standard unrecognized VM option.
1298 JVMFlag* found_flag = JVMFlag::find_flag((const char*)argname, arg_len, true, true);
1299 if (found_flag != NULL) {
1300 char locked_message_buf[BUFLEN];
1301 JVMFlag::MsgType msg_type = found_flag->get_locked_message(locked_message_buf, BUFLEN);
1302 if (strlen(locked_message_buf) == 0) {
1303 if (found_flag->is_bool() && !has_plus_minus) {
1304 jio_fprintf(defaultStream::error_stream(),
1305 "Missing +/- setting for VM option '%s'\n", argname);
1306 } else if (!found_flag->is_bool() && has_plus_minus) {
1307 jio_fprintf(defaultStream::error_stream(),
1308 "Unexpected +/- setting in VM option '%s'\n", argname);
1309 } else {
1310 jio_fprintf(defaultStream::error_stream(),
1311 "Improperly specified VM option '%s'\n", argname);
1312 }
1313 } else {
1314 #ifdef PRODUCT
1315 bool mismatched = ((msg_type == JVMFlag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD) ||
1316 (msg_type == JVMFlag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD));
1317 if (ignore_unrecognized && mismatched) {
1318 return true;
1319 }
1320 #endif
1321 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf);
1322 }
1323 } else {
1324 if (ignore_unrecognized) {
1325 return true;
1326 }
1327 jio_fprintf(defaultStream::error_stream(),
1328 "Unrecognized VM option '%s'\n", argname);
1329 JVMFlag* fuzzy_matched = JVMFlag::fuzzy_match((const char*)argname, arg_len, true);
1330 if (fuzzy_matched != NULL) {
1331 jio_fprintf(defaultStream::error_stream(),
1332 "Did you mean '%s%s%s'? ",
1333 (fuzzy_matched->is_bool()) ? "(+/-)" : "",
1334 fuzzy_matched->_name,
1335 (fuzzy_matched->is_bool()) ? "" : "=<value>");
1336 }
1337 }
1338
1339 // allow for commandline "commenting out" options like -XX:#+Verbose
1340 return arg[0] == '#';
1341 }
1342
1343 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) {
1344 FILE* stream = fopen(file_name, "rb");
1345 if (stream == NULL) {
1346 if (should_exist) {
1347 jio_fprintf(defaultStream::error_stream(),
1348 "Could not open settings file %s\n", file_name);
1349 return false;
1350 } else {
1351 return true;
1352 }
1353 }
1354
1355 char token[1024];
1356 int pos = 0;
1357
1358 bool in_white_space = true;
1359 bool in_comment = false;
1360 bool in_quote = false;
1361 char quote_c = 0;
1362 bool result = true;
1363
1364 int c = getc(stream);
1365 while(c != EOF && pos < (int)(sizeof(token)-1)) {
1366 if (in_white_space) {
1367 if (in_comment) {
1368 if (c == '\n') in_comment = false;
1369 } else {
1370 if (c == '#') in_comment = true;
1371 else if (!isspace(c)) {
1372 in_white_space = false;
1373 token[pos++] = c;
1374 }
1375 }
1376 } else {
1377 if (c == '\n' || (!in_quote && isspace(c))) {
1378 // token ends at newline, or at unquoted whitespace
1379 // this allows a way to include spaces in string-valued options
1380 token[pos] = '\0';
1381 logOption(token);
1382 result &= process_argument(token, ignore_unrecognized, JVMFlag::CONFIG_FILE);
1383 build_jvm_flags(token);
1384 pos = 0;
1385 in_white_space = true;
1386 in_quote = false;
1387 } else if (!in_quote && (c == '\'' || c == '"')) {
1388 in_quote = true;
1389 quote_c = c;
1390 } else if (in_quote && (c == quote_c)) {
1391 in_quote = false;
1392 } else {
1393 token[pos++] = c;
1394 }
1395 }
1396 c = getc(stream);
1397 }
1398 if (pos > 0) {
1399 token[pos] = '\0';
1400 result &= process_argument(token, ignore_unrecognized, JVMFlag::CONFIG_FILE);
1401 build_jvm_flags(token);
1402 }
1403 fclose(stream);
1404 return result;
1405 }
1406
1407 //=============================================================================================================
1408 // Parsing of properties (-D)
1409
1410 const char* Arguments::get_property(const char* key) {
1411 return PropertyList_get_value(system_properties(), key);
1412 }
1413
1414 bool Arguments::add_property(const char* prop, PropertyWriteable writeable, PropertyInternal internal) {
1415 const char* eq = strchr(prop, '=');
1416 const char* key;
1417 const char* value = "";
1418
1419 if (eq == NULL) {
1420 // property doesn't have a value, thus use passed string
1421 key = prop;
1422 } else {
1423 // property have a value, thus extract it and save to the
1424 // allocated string
1425 size_t key_len = eq - prop;
1426 char* tmp_key = AllocateHeap(key_len + 1, mtArguments);
1427
1428 jio_snprintf(tmp_key, key_len + 1, "%s", prop);
1429 key = tmp_key;
1430
1431 value = &prop[key_len + 1];
1432 }
1433
1434 if (strcmp(key, "java.compiler") == 0) {
1435 process_java_compiler_argument(value);
1436 // Record value in Arguments, but let it get passed to Java.
1437 } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 ||
1438 strcmp(key, "sun.java.launcher.pid") == 0) {
1439 // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are
1440 // private and are processed in process_sun_java_launcher_properties();
1441 // the sun.java.launcher property is passed on to the java application
1442 } else if (strcmp(key, "sun.boot.library.path") == 0) {
1443 // append is true, writable is true, internal is false
1444 PropertyList_unique_add(&_system_properties, key, value, AppendProperty,
1445 WriteableProperty, ExternalProperty);
1446 } else {
1447 if (strcmp(key, "sun.java.command") == 0) {
1448 char *old_java_command = _java_command;
1449 _java_command = os::strdup_check_oom(value, mtArguments);
1450 if (old_java_command != NULL) {
1451 os::free(old_java_command);
1452 }
1453 } else if (strcmp(key, "java.vendor.url.bug") == 0) {
1454 const char* old_java_vendor_url_bug = _java_vendor_url_bug;
1455 // save it in _java_vendor_url_bug, so JVM fatal error handler can access
1456 // its value without going through the property list or making a Java call.
1457 _java_vendor_url_bug = os::strdup_check_oom(value, mtArguments);
1458 if (old_java_vendor_url_bug != DEFAULT_VENDOR_URL_BUG) {
1459 assert(old_java_vendor_url_bug != NULL, "_java_vendor_url_bug is NULL");
1460 os::free((void *)old_java_vendor_url_bug);
1461 }
1462 }
1463
1464 // Create new property and add at the end of the list
1465 PropertyList_unique_add(&_system_properties, key, value, AddProperty, writeable, internal);
1466 }
1467
1468 if (key != prop) {
1469 // SystemProperty copy passed value, thus free previously allocated
1470 // memory
1471 FreeHeap((void *)key);
1472 }
1473
1474 return true;
1475 }
1476
1477 #if INCLUDE_CDS
1478 const char* unsupported_properties[] = { "jdk.module.limitmods",
1479 "jdk.module.upgrade.path",
1480 "jdk.module.patch.0" };
1481 const char* unsupported_options[] = { "--limit-modules",
1482 "--upgrade-module-path",
1483 "--patch-module"
1484 };
1485 void Arguments::check_unsupported_dumping_properties() {
1486 assert(DumpSharedSpaces, "this function is only used with -Xshare:dump");
1487 assert(ARRAY_SIZE(unsupported_properties) == ARRAY_SIZE(unsupported_options), "must be");
1488 // If a vm option is found in the unsupported_options array, vm will exit with an error message.
1489 SystemProperty* sp = system_properties();
1490 while (sp != NULL) {
1491 for (uint i = 0; i < ARRAY_SIZE(unsupported_properties); i++) {
1492 if (strcmp(sp->key(), unsupported_properties[i]) == 0) {
1493 vm_exit_during_initialization(
1494 "Cannot use the following option when dumping the shared archive", unsupported_options[i]);
1495 }
1496 }
1497 sp = sp->next();
1498 }
1499
1500 // Check for an exploded module build in use with -Xshare:dump.
1501 if (!has_jimage()) {
1502 vm_exit_during_initialization("Dumping the shared archive is not supported with an exploded module build");
1503 }
1504 }
1505
1506 bool Arguments::check_unsupported_cds_runtime_properties() {
1507 assert(UseSharedSpaces, "this function is only used with -Xshare:{on,auto}");
1508 assert(ARRAY_SIZE(unsupported_properties) == ARRAY_SIZE(unsupported_options), "must be");
1509 for (uint i = 0; i < ARRAY_SIZE(unsupported_properties); i++) {
1510 if (get_property(unsupported_properties[i]) != NULL) {
1511 if (RequireSharedSpaces) {
1512 warning("CDS is disabled when the %s option is specified.", unsupported_options[i]);
1513 }
1514 return true;
1515 }
1516 }
1517 return false;
1518 }
1519 #endif
1520
1521 //===========================================================================================================
1522 // Setting int/mixed/comp mode flags
1523
1524 void Arguments::set_mode_flags(Mode mode) {
1525 // Set up default values for all flags.
1526 // If you add a flag to any of the branches below,
1527 // add a default value for it here.
1528 set_java_compiler(false);
1529 _mode = mode;
1530
1531 // Ensure Agent_OnLoad has the correct initial values.
1532 // This may not be the final mode; mode may change later in onload phase.
1533 PropertyList_unique_add(&_system_properties, "java.vm.info",
1534 VM_Version::vm_info_string(), AddProperty, UnwriteableProperty, ExternalProperty);
1535
1536 UseInterpreter = true;
1537 UseCompiler = true;
1538 UseLoopCounter = true;
1539
1540 // Default values may be platform/compiler dependent -
1541 // use the saved values
1542 ClipInlining = Arguments::_ClipInlining;
1543 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods;
1544 UseOnStackReplacement = Arguments::_UseOnStackReplacement;
1545 BackgroundCompilation = Arguments::_BackgroundCompilation;
1546 if (TieredCompilation) {
1547 if (FLAG_IS_DEFAULT(Tier3InvokeNotifyFreqLog)) {
1548 Tier3InvokeNotifyFreqLog = Arguments::_Tier3InvokeNotifyFreqLog;
1549 }
1550 if (FLAG_IS_DEFAULT(Tier4InvocationThreshold)) {
1551 Tier4InvocationThreshold = Arguments::_Tier4InvocationThreshold;
1552 }
1553 }
1554
1555 // Change from defaults based on mode
1556 switch (mode) {
1557 default:
1558 ShouldNotReachHere();
1559 break;
1560 case _int:
1561 UseCompiler = false;
1562 UseLoopCounter = false;
1563 AlwaysCompileLoopMethods = false;
1564 UseOnStackReplacement = false;
1565 break;
1566 case _mixed:
1567 // same as default
1568 break;
1569 case _comp:
1570 UseInterpreter = false;
1571 BackgroundCompilation = false;
1572 ClipInlining = false;
1573 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more.
1574 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and
1575 // compile a level 4 (C2) and then continue executing it.
1576 if (TieredCompilation) {
1577 Tier3InvokeNotifyFreqLog = 0;
1578 Tier4InvocationThreshold = 0;
1579 }
1580 break;
1581 }
1582 }
1583
1584 // Conflict: required to use shared spaces (-Xshare:on), but
1585 // incompatible command line options were chosen.
1586 static void no_shared_spaces(const char* message) {
1587 if (RequireSharedSpaces) {
1588 jio_fprintf(defaultStream::error_stream(),
1589 "Class data sharing is inconsistent with other specified options.\n");
1590 vm_exit_during_initialization("Unable to use shared archive", message);
1591 } else {
1592 FLAG_SET_DEFAULT(UseSharedSpaces, false);
1593 }
1594 }
1595
1596 void set_object_alignment() {
1597 // Object alignment.
1598 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2");
1599 MinObjAlignmentInBytes = ObjectAlignmentInBytes;
1600 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small");
1601 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize;
1602 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect");
1603 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1;
1604
1605 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes);
1606 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize;
1607
1608 // Oop encoding heap max
1609 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes;
1610
1611 if (SurvivorAlignmentInBytes == 0) {
1612 SurvivorAlignmentInBytes = ObjectAlignmentInBytes;
1613 }
1614 }
1615
1616 size_t Arguments::max_heap_for_compressed_oops() {
1617 // Avoid sign flip.
1618 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size");
1619 // We need to fit both the NULL page and the heap into the memory budget, while
1620 // keeping alignment constraints of the heap. To guarantee the latter, as the
1621 // NULL page is located before the heap, we pad the NULL page to the conservative
1622 // maximum alignment that the GC may ever impose upon the heap.
1623 size_t displacement_due_to_null_page = align_up((size_t)os::vm_page_size(),
1624 _conservative_max_heap_alignment);
1625
1626 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page);
1627 NOT_LP64(ShouldNotReachHere(); return 0);
1628 }
1629
1630 void Arguments::set_use_compressed_oops() {
1631 #ifndef ZERO
1632 #ifdef _LP64
1633 // MaxHeapSize is not set up properly at this point, but
1634 // the only value that can override MaxHeapSize if we are
1635 // to use UseCompressedOops is InitialHeapSize.
1636 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize);
1637
1638 if (max_heap_size <= max_heap_for_compressed_oops()) {
1639 #if !defined(COMPILER1) || defined(TIERED)
1640 if (FLAG_IS_DEFAULT(UseCompressedOops)) {
1641 FLAG_SET_ERGO(bool, UseCompressedOops, true);
1642 }
1643 #endif
1644 } else {
1645 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) {
1646 warning("Max heap size too large for Compressed Oops");
1647 FLAG_SET_DEFAULT(UseCompressedOops, false);
1648 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1649 }
1650 }
1651 #endif // _LP64
1652 #endif // ZERO
1653 }
1654
1655
1656 // NOTE: set_use_compressed_klass_ptrs() must be called after calling
1657 // set_use_compressed_oops().
1658 void Arguments::set_use_compressed_klass_ptrs() {
1659 #ifndef ZERO
1660 #ifdef _LP64
1661 // UseCompressedOops must be on for UseCompressedClassPointers to be on.
1662 if (!UseCompressedOops) {
1663 if (UseCompressedClassPointers) {
1664 warning("UseCompressedClassPointers requires UseCompressedOops");
1665 }
1666 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1667 } else {
1668 // Turn on UseCompressedClassPointers too
1669 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) {
1670 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true);
1671 }
1672 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs.
1673 if (UseCompressedClassPointers) {
1674 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) {
1675 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers");
1676 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1677 }
1678 }
1679 }
1680 #endif // _LP64
1681 #endif // !ZERO
1682 }
1683
1684 void Arguments::set_conservative_max_heap_alignment() {
1685 // The conservative maximum required alignment for the heap is the maximum of
1686 // the alignments imposed by several sources: any requirements from the heap
1687 // itself, the collector policy and the maximum page size we may run the VM
1688 // with.
1689 size_t heap_alignment = GCConfig::arguments()->conservative_max_heap_alignment();
1690 _conservative_max_heap_alignment = MAX4(heap_alignment,
1691 (size_t)os::vm_allocation_granularity(),
1692 os::max_page_size(),
1693 CollectorPolicy::compute_heap_alignment());
1694 }
1695
1696 jint Arguments::set_ergonomics_flags() {
1697 GCConfig::initialize();
1698
1699 set_conservative_max_heap_alignment();
1700
1701 #ifndef ZERO
1702 #ifdef _LP64
1703 set_use_compressed_oops();
1704
1705 // set_use_compressed_klass_ptrs() must be called after calling
1706 // set_use_compressed_oops().
1707 set_use_compressed_klass_ptrs();
1708
1709 // Also checks that certain machines are slower with compressed oops
1710 // in vm_version initialization code.
1711 #endif // _LP64
1712 #endif // !ZERO
1713
1714 return JNI_OK;
1715 }
1716
1717 julong Arguments::limit_by_allocatable_memory(julong limit) {
1718 julong max_allocatable;
1719 julong result = limit;
1720 if (os::has_allocatable_memory_limit(&max_allocatable)) {
1721 result = MIN2(result, max_allocatable / MaxVirtMemFraction);
1722 }
1723 return result;
1724 }
1725
1726 // Use static initialization to get the default before parsing
1727 static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress;
1728
1729 void Arguments::set_heap_size() {
1730 julong phys_mem =
1731 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM)
1732 : (julong)MaxRAM;
1733
1734 // Convert deprecated flags
1735 if (FLAG_IS_DEFAULT(MaxRAMPercentage) &&
1736 !FLAG_IS_DEFAULT(MaxRAMFraction))
1737 MaxRAMPercentage = 100.0 / MaxRAMFraction;
1738
1739 if (FLAG_IS_DEFAULT(MinRAMPercentage) &&
1740 !FLAG_IS_DEFAULT(MinRAMFraction))
1741 MinRAMPercentage = 100.0 / MinRAMFraction;
1742
1743 if (FLAG_IS_DEFAULT(InitialRAMPercentage) &&
1744 !FLAG_IS_DEFAULT(InitialRAMFraction))
1745 InitialRAMPercentage = 100.0 / InitialRAMFraction;
1746
1747 // If the maximum heap size has not been set with -Xmx,
1748 // then set it as fraction of the size of physical memory,
1749 // respecting the maximum and minimum sizes of the heap.
1750 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
1751 julong reasonable_max = (julong)((phys_mem * MaxRAMPercentage) / 100);
1752 const julong reasonable_min = (julong)((phys_mem * MinRAMPercentage) / 100);
1753 if (reasonable_min < MaxHeapSize) {
1754 // Small physical memory, so use a minimum fraction of it for the heap
1755 reasonable_max = reasonable_min;
1756 } else {
1757 // Not-small physical memory, so require a heap at least
1758 // as large as MaxHeapSize
1759 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize);
1760 }
1761
1762 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) {
1763 // Limit the heap size to ErgoHeapSizeLimit
1764 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit);
1765 }
1766 if (UseCompressedOops) {
1767 // Limit the heap size to the maximum possible when using compressed oops
1768 julong max_coop_heap = (julong)max_heap_for_compressed_oops();
1769
1770 // HeapBaseMinAddress can be greater than default but not less than.
1771 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) {
1772 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) {
1773 // matches compressed oops printing flags
1774 log_debug(gc, heap, coops)("HeapBaseMinAddress must be at least " SIZE_FORMAT
1775 " (" SIZE_FORMAT "G) which is greater than value given " SIZE_FORMAT,
1776 DefaultHeapBaseMinAddress,
1777 DefaultHeapBaseMinAddress/G,
1778 HeapBaseMinAddress);
1779 FLAG_SET_ERGO(size_t, HeapBaseMinAddress, DefaultHeapBaseMinAddress);
1780 }
1781 }
1782
1783 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) {
1784 // Heap should be above HeapBaseMinAddress to get zero based compressed oops
1785 // but it should be not less than default MaxHeapSize.
1786 max_coop_heap -= HeapBaseMinAddress;
1787 }
1788 reasonable_max = MIN2(reasonable_max, max_coop_heap);
1789 }
1790 reasonable_max = limit_by_allocatable_memory(reasonable_max);
1791
1792 if (!FLAG_IS_DEFAULT(InitialHeapSize)) {
1793 // An initial heap size was specified on the command line,
1794 // so be sure that the maximum size is consistent. Done
1795 // after call to limit_by_allocatable_memory because that
1796 // method might reduce the allocation size.
1797 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize);
1798 }
1799
1800 log_trace(gc, heap)(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max);
1801 FLAG_SET_ERGO(size_t, MaxHeapSize, (size_t)reasonable_max);
1802 }
1803
1804 // If the minimum or initial heap_size have not been set or requested to be set
1805 // ergonomically, set them accordingly.
1806 if (InitialHeapSize == 0 || min_heap_size() == 0) {
1807 julong reasonable_minimum = (julong)(OldSize + NewSize);
1808
1809 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize);
1810
1811 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum);
1812
1813 if (InitialHeapSize == 0) {
1814 julong reasonable_initial = (julong)((phys_mem * InitialRAMPercentage) / 100);
1815
1816 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size());
1817 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize);
1818
1819 reasonable_initial = limit_by_allocatable_memory(reasonable_initial);
1820
1821 log_trace(gc, heap)(" Initial heap size " SIZE_FORMAT, (size_t)reasonable_initial);
1822 FLAG_SET_ERGO(size_t, InitialHeapSize, (size_t)reasonable_initial);
1823 }
1824 // If the minimum heap size has not been set (via -Xms),
1825 // synchronize with InitialHeapSize to avoid errors with the default value.
1826 if (min_heap_size() == 0) {
1827 set_min_heap_size(MIN2((size_t)reasonable_minimum, InitialHeapSize));
1828 log_trace(gc, heap)(" Minimum heap size " SIZE_FORMAT, min_heap_size());
1829 }
1830 }
1831 }
1832
1833 // This option inspects the machine and attempts to set various
1834 // parameters to be optimal for long-running, memory allocation
1835 // intensive jobs. It is intended for machines with large
1836 // amounts of cpu and memory.
1837 jint Arguments::set_aggressive_heap_flags() {
1838 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit
1839 // VM, but we may not be able to represent the total physical memory
1840 // available (like having 8gb of memory on a box but using a 32bit VM).
1841 // Thus, we need to make sure we're using a julong for intermediate
1842 // calculations.
1843 julong initHeapSize;
1844 julong total_memory = os::physical_memory();
1845
1846 if (total_memory < (julong) 256 * M) {
1847 jio_fprintf(defaultStream::error_stream(),
1848 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n");
1849 vm_exit(1);
1850 }
1851
1852 // The heap size is half of available memory, or (at most)
1853 // all of possible memory less 160mb (leaving room for the OS
1854 // when using ISM). This is the maximum; because adaptive sizing
1855 // is turned on below, the actual space used may be smaller.
1856
1857 initHeapSize = MIN2(total_memory / (julong) 2,
1858 total_memory - (julong) 160 * M);
1859
1860 initHeapSize = limit_by_allocatable_memory(initHeapSize);
1861
1862 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
1863 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, initHeapSize) != JVMFlag::SUCCESS) {
1864 return JNI_EINVAL;
1865 }
1866 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, initHeapSize) != JVMFlag::SUCCESS) {
1867 return JNI_EINVAL;
1868 }
1869 // Currently the minimum size and the initial heap sizes are the same.
1870 set_min_heap_size(initHeapSize);
1871 }
1872 if (FLAG_IS_DEFAULT(NewSize)) {
1873 // Make the young generation 3/8ths of the total heap.
1874 if (FLAG_SET_CMDLINE(size_t, NewSize,
1875 ((julong) MaxHeapSize / (julong) 8) * (julong) 3) != JVMFlag::SUCCESS) {
1876 return JNI_EINVAL;
1877 }
1878 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, NewSize) != JVMFlag::SUCCESS) {
1879 return JNI_EINVAL;
1880 }
1881 }
1882
1883 #if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
1884 FLAG_SET_DEFAULT(UseLargePages, true);
1885 #endif
1886
1887 // Increase some data structure sizes for efficiency
1888 if (FLAG_SET_CMDLINE(size_t, BaseFootPrintEstimate, MaxHeapSize) != JVMFlag::SUCCESS) {
1889 return JNI_EINVAL;
1890 }
1891 if (FLAG_SET_CMDLINE(bool, ResizeTLAB, false) != JVMFlag::SUCCESS) {
1892 return JNI_EINVAL;
1893 }
1894 if (FLAG_SET_CMDLINE(size_t, TLABSize, 256 * K) != JVMFlag::SUCCESS) {
1895 return JNI_EINVAL;
1896 }
1897
1898 // See the OldPLABSize comment below, but replace 'after promotion'
1899 // with 'after copying'. YoungPLABSize is the size of the survivor
1900 // space per-gc-thread buffers. The default is 4kw.
1901 if (FLAG_SET_CMDLINE(size_t, YoungPLABSize, 256 * K) != JVMFlag::SUCCESS) { // Note: this is in words
1902 return JNI_EINVAL;
1903 }
1904
1905 // OldPLABSize is the size of the buffers in the old gen that
1906 // UseParallelGC uses to promote live data that doesn't fit in the
1907 // survivor spaces. At any given time, there's one for each gc thread.
1908 // The default size is 1kw. These buffers are rarely used, since the
1909 // survivor spaces are usually big enough. For specjbb, however, there
1910 // are occasions when there's lots of live data in the young gen
1911 // and we end up promoting some of it. We don't have a definite
1912 // explanation for why bumping OldPLABSize helps, but the theory
1913 // is that a bigger PLAB results in retaining something like the
1914 // original allocation order after promotion, which improves mutator
1915 // locality. A minor effect may be that larger PLABs reduce the
1916 // number of PLAB allocation events during gc. The value of 8kw
1917 // was arrived at by experimenting with specjbb.
1918 if (FLAG_SET_CMDLINE(size_t, OldPLABSize, 8 * K) != JVMFlag::SUCCESS) { // Note: this is in words
1919 return JNI_EINVAL;
1920 }
1921
1922 // Enable parallel GC and adaptive generation sizing
1923 if (FLAG_SET_CMDLINE(bool, UseParallelGC, true) != JVMFlag::SUCCESS) {
1924 return JNI_EINVAL;
1925 }
1926
1927 // Encourage steady state memory management
1928 if (FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100) != JVMFlag::SUCCESS) {
1929 return JNI_EINVAL;
1930 }
1931
1932 // This appears to improve mutator locality
1933 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != JVMFlag::SUCCESS) {
1934 return JNI_EINVAL;
1935 }
1936
1937 // Get around early Solaris scheduling bug
1938 // (affinity vs other jobs on system)
1939 // but disallow DR and offlining (5008695).
1940 if (FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true) != JVMFlag::SUCCESS) {
1941 return JNI_EINVAL;
1942 }
1943
1944 return JNI_OK;
1945 }
1946
1947 // This must be called after ergonomics.
1948 void Arguments::set_bytecode_flags() {
1949 if (!RewriteBytecodes) {
1950 FLAG_SET_DEFAULT(RewriteFrequentPairs, false);
1951 }
1952 }
1953
1954 // Aggressive optimization flags -XX:+AggressiveOpts
1955 jint Arguments::set_aggressive_opts_flags() {
1956 #ifdef COMPILER2
1957 if (AggressiveUnboxing) {
1958 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
1959 FLAG_SET_DEFAULT(EliminateAutoBox, true);
1960 } else if (!EliminateAutoBox) {
1961 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled");
1962 AggressiveUnboxing = false;
1963 }
1964 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) {
1965 FLAG_SET_DEFAULT(DoEscapeAnalysis, true);
1966 } else if (!DoEscapeAnalysis) {
1967 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled");
1968 AggressiveUnboxing = false;
1969 }
1970 }
1971 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
1972 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
1973 FLAG_SET_DEFAULT(EliminateAutoBox, true);
1974 }
1975 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
1976 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000);
1977 }
1978
1979 // Feed the cache size setting into the JDK
1980 char buffer[1024];
1981 jio_snprintf(buffer, 1024, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax);
1982 if (!add_property(buffer)) {
1983 return JNI_ENOMEM;
1984 }
1985 }
1986 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) {
1987 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500);
1988 }
1989 #endif
1990
1991 if (AggressiveOpts) {
1992 // Sample flag setting code
1993 // if (FLAG_IS_DEFAULT(EliminateZeroing)) {
1994 // FLAG_SET_DEFAULT(EliminateZeroing, true);
1995 // }
1996 }
1997
1998 return JNI_OK;
1999 }
2000
2001 //===========================================================================================================
2002 // Parsing of java.compiler property
2003
2004 void Arguments::process_java_compiler_argument(const char* arg) {
2005 // For backwards compatibility, Djava.compiler=NONE or ""
2006 // causes us to switch to -Xint mode UNLESS -Xdebug
2007 // is also specified.
2008 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) {
2009 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen.
2010 }
2011 }
2012
2013 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) {
2014 _sun_java_launcher = os::strdup_check_oom(launcher);
2015 }
2016
2017 bool Arguments::created_by_java_launcher() {
2018 assert(_sun_java_launcher != NULL, "property must have value");
2019 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0;
2020 }
2021
2022 bool Arguments::sun_java_launcher_is_altjvm() {
2023 return _sun_java_launcher_is_altjvm;
2024 }
2025
2026 //===========================================================================================================
2027 // Parsing of main arguments
2028
2029 unsigned int addreads_count = 0;
2030 unsigned int addexports_count = 0;
2031 unsigned int addopens_count = 0;
2032 unsigned int addmods_count = 0;
2033 unsigned int patch_mod_count = 0;
2034
2035 // Check the consistency of vm_init_args
2036 bool Arguments::check_vm_args_consistency() {
2037 // Method for adding checks for flag consistency.
2038 // The intent is to warn the user of all possible conflicts,
2039 // before returning an error.
2040 // Note: Needs platform-dependent factoring.
2041 bool status = true;
2042
2043 if (TLABRefillWasteFraction == 0) {
2044 jio_fprintf(defaultStream::error_stream(),
2045 "TLABRefillWasteFraction should be a denominator, "
2046 "not " SIZE_FORMAT "\n",
2047 TLABRefillWasteFraction);
2048 status = false;
2049 }
2050
2051 if (PrintNMTStatistics) {
2052 #if INCLUDE_NMT
2053 if (MemTracker::tracking_level() == NMT_off) {
2054 #endif // INCLUDE_NMT
2055 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled");
2056 PrintNMTStatistics = false;
2057 #if INCLUDE_NMT
2058 }
2059 #endif
2060 }
2061
2062 status = CompilerConfig::check_args_consistency(status);
2063 #if INCLUDE_JVMCI
2064 if (status && EnableJVMCI) {
2065 PropertyList_unique_add(&_system_properties, "jdk.internal.vm.ci.enabled", "true",
2066 AddProperty, UnwriteableProperty, InternalProperty);
2067 if (!create_numbered_property("jdk.module.addmods", "jdk.internal.vm.ci", addmods_count++)) {
2068 return false;
2069 }
2070 }
2071 #endif
2072
2073 #ifndef SUPPORT_RESERVED_STACK_AREA
2074 if (StackReservedPages != 0) {
2075 FLAG_SET_CMDLINE(intx, StackReservedPages, 0);
2076 warning("Reserved Stack Area not supported on this platform");
2077 }
2078 #endif
2079
2080 if (!FLAG_IS_DEFAULT(AllocateHeapAt)) {
2081 if ((UseNUMAInterleaving && !FLAG_IS_DEFAULT(UseNUMAInterleaving)) || (UseNUMA && !FLAG_IS_DEFAULT(UseNUMA))) {
2082 log_warning(arguments) ("NUMA support for Heap depends on the file system when AllocateHeapAt option is used.\n");
2083 }
2084 }
2085
2086 // FIXME
2087 //if (LP64_ONLY(false &&) !FLAG_IS_DEFAULT(ValueTypePassFieldsAsArgs)) {
2088 if (!FLAG_IS_DEFAULT(ValueTypePassFieldsAsArgs)) {
2089 FLAG_SET_CMDLINE(bool, ValueTypePassFieldsAsArgs, false);
2090 warning("ValueTypePassFieldsAsArgs is not supported on this platform");
2091 }
2092
2093 // FIXME
2094 //if (LP64_ONLY(false &&) !FLAG_IS_DEFAULT(ValueTypeReturnedAsFields)) {
2095 if (!FLAG_IS_DEFAULT(ValueTypeReturnedAsFields)) {
2096 FLAG_SET_CMDLINE(bool, ValueTypeReturnedAsFields, false);
2097 warning("ValueTypeReturnedAsFields is not supported on this platform");
2098 }
2099
2100 if (EnableValhalla) {
2101 // C1 has no support for value types
2102 if (!FLAG_IS_DEFAULT(TieredCompilation)) {
2103 warning("TieredCompilation disabled because value types are not supported by C1");
2104 }
2105 FLAG_SET_CMDLINE(bool, TieredCompilation, false);
2106 } else {
2107 FLAG_SET_CMDLINE(bool, ValueArrayFlatten, false);
2108 }
2109
2110 return status;
2111 }
2112
2113 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore,
2114 const char* option_type) {
2115 if (ignore) return false;
2116
2117 const char* spacer = " ";
2118 if (option_type == NULL) {
2119 option_type = ++spacer; // Set both to the empty string.
2120 }
2121
2122 if (os::obsolete_option(option)) {
2123 jio_fprintf(defaultStream::error_stream(),
2124 "Obsolete %s%soption: %s\n", option_type, spacer,
2125 option->optionString);
2126 return false;
2127 } else {
2128 jio_fprintf(defaultStream::error_stream(),
2129 "Unrecognized %s%soption: %s\n", option_type, spacer,
2130 option->optionString);
2131 return true;
2132 }
2133 }
2134
2135 static const char* user_assertion_options[] = {
2136 "-da", "-ea", "-disableassertions", "-enableassertions", 0
2137 };
2138
2139 static const char* system_assertion_options[] = {
2140 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0
2141 };
2142
2143 bool Arguments::parse_uintx(const char* value,
2144 uintx* uintx_arg,
2145 uintx min_size) {
2146
2147 // Check the sign first since atojulong() parses only unsigned values.
2148 bool value_is_positive = !(*value == '-');
2149
2150 if (value_is_positive) {
2151 julong n;
2152 bool good_return = atojulong(value, &n);
2153 if (good_return) {
2154 bool above_minimum = n >= min_size;
2155 bool value_is_too_large = n > max_uintx;
2156
2157 if (above_minimum && !value_is_too_large) {
2158 *uintx_arg = n;
2159 return true;
2160 }
2161 }
2162 }
2163 return false;
2164 }
2165
2166 bool Arguments::create_property(const char* prop_name, const char* prop_value, PropertyInternal internal) {
2167 size_t prop_len = strlen(prop_name) + strlen(prop_value) + 2;
2168 char* property = AllocateHeap(prop_len, mtArguments);
2169 int ret = jio_snprintf(property, prop_len, "%s=%s", prop_name, prop_value);
2170 if (ret < 0 || ret >= (int)prop_len) {
2171 FreeHeap(property);
2172 return false;
2173 }
2174 bool added = add_property(property, UnwriteableProperty, internal);
2175 FreeHeap(property);
2176 return added;
2177 }
2178
2179 bool Arguments::create_numbered_property(const char* prop_base_name, const char* prop_value, unsigned int count) {
2180 const unsigned int props_count_limit = 1000;
2181 const int max_digits = 3;
2182 const int extra_symbols_count = 3; // includes '.', '=', '\0'
2183
2184 // Make sure count is < props_count_limit. Otherwise, memory allocation will be too small.
2185 if (count < props_count_limit) {
2186 size_t prop_len = strlen(prop_base_name) + strlen(prop_value) + max_digits + extra_symbols_count;
2187 char* property = AllocateHeap(prop_len, mtArguments);
2188 int ret = jio_snprintf(property, prop_len, "%s.%d=%s", prop_base_name, count, prop_value);
2189 if (ret < 0 || ret >= (int)prop_len) {
2190 FreeHeap(property);
2191 jio_fprintf(defaultStream::error_stream(), "Failed to create property %s.%d=%s\n", prop_base_name, count, prop_value);
2192 return false;
2193 }
2194 bool added = add_property(property, UnwriteableProperty, InternalProperty);
2195 FreeHeap(property);
2196 return added;
2197 }
2198
2199 jio_fprintf(defaultStream::error_stream(), "Property count limit exceeded: %s, limit=%d\n", prop_base_name, props_count_limit);
2200 return false;
2201 }
2202
2203 Arguments::ArgsRange Arguments::parse_memory_size(const char* s,
2204 julong* long_arg,
2205 julong min_size,
2206 julong max_size) {
2207 if (!atojulong(s, long_arg)) return arg_unreadable;
2208 return check_memory_size(*long_arg, min_size, max_size);
2209 }
2210
2211 // Parse JavaVMInitArgs structure
2212
2213 jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args,
2214 const JavaVMInitArgs *java_options_args,
2215 const JavaVMInitArgs *cmd_line_args) {
2216 bool patch_mod_javabase = false;
2217
2218 // Save default settings for some mode flags
2219 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
2220 Arguments::_UseOnStackReplacement = UseOnStackReplacement;
2221 Arguments::_ClipInlining = ClipInlining;
2222 Arguments::_BackgroundCompilation = BackgroundCompilation;
2223 if (TieredCompilation) {
2224 Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
2225 Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
2226 }
2227
2228 // Setup flags for mixed which is the default
2229 set_mode_flags(_mixed);
2230
2231 // Parse args structure generated from JAVA_TOOL_OPTIONS environment
2232 // variable (if present).
2233 jint result = parse_each_vm_init_arg(java_tool_options_args, &patch_mod_javabase, JVMFlag::ENVIRON_VAR);
2234 if (result != JNI_OK) {
2235 return result;
2236 }
2237
2238 // Parse args structure generated from the command line flags.
2239 result = parse_each_vm_init_arg(cmd_line_args, &patch_mod_javabase, JVMFlag::COMMAND_LINE);
2240 if (result != JNI_OK) {
2241 return result;
2242 }
2243
2244 // Parse args structure generated from the _JAVA_OPTIONS environment
2245 // variable (if present) (mimics classic VM)
2246 result = parse_each_vm_init_arg(java_options_args, &patch_mod_javabase, JVMFlag::ENVIRON_VAR);
2247 if (result != JNI_OK) {
2248 return result;
2249 }
2250
2251 // We need to ensure processor and memory resources have been properly
2252 // configured - which may rely on arguments we just processed - before
2253 // doing the final argument processing. Any argument processing that
2254 // needs to know about processor and memory resources must occur after
2255 // this point.
2256
2257 os::init_container_support();
2258
2259 // Do final processing now that all arguments have been parsed
2260 result = finalize_vm_init_args(patch_mod_javabase);
2261 if (result != JNI_OK) {
2262 return result;
2263 }
2264
2265 return JNI_OK;
2266 }
2267
2268 // Checks if name in command-line argument -agent{lib,path}:name[=options]
2269 // represents a valid JDWP agent. is_path==true denotes that we
2270 // are dealing with -agentpath (case where name is a path), otherwise with
2271 // -agentlib
2272 bool valid_jdwp_agent(char *name, bool is_path) {
2273 char *_name;
2274 const char *_jdwp = "jdwp";
2275 size_t _len_jdwp, _len_prefix;
2276
2277 if (is_path) {
2278 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) {
2279 return false;
2280 }
2281
2282 _name++; // skip past last path separator
2283 _len_prefix = strlen(JNI_LIB_PREFIX);
2284
2285 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) {
2286 return false;
2287 }
2288
2289 _name += _len_prefix;
2290 _len_jdwp = strlen(_jdwp);
2291
2292 if (strncmp(_name, _jdwp, _len_jdwp) == 0) {
2293 _name += _len_jdwp;
2294 }
2295 else {
2296 return false;
2297 }
2298
2299 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) {
2300 return false;
2301 }
2302
2303 return true;
2304 }
2305
2306 if (strcmp(name, _jdwp) == 0) {
2307 return true;
2308 }
2309
2310 return false;
2311 }
2312
2313 int Arguments::process_patch_mod_option(const char* patch_mod_tail, bool* patch_mod_javabase) {
2314 // --patch-module=<module>=<file>(<pathsep><file>)*
2315 assert(patch_mod_tail != NULL, "Unexpected NULL patch-module value");
2316 // Find the equal sign between the module name and the path specification
2317 const char* module_equal = strchr(patch_mod_tail, '=');
2318 if (module_equal == NULL) {
2319 jio_fprintf(defaultStream::output_stream(), "Missing '=' in --patch-module specification\n");
2320 return JNI_ERR;
2321 } else {
2322 // Pick out the module name
2323 size_t module_len = module_equal - patch_mod_tail;
2324 char* module_name = NEW_C_HEAP_ARRAY_RETURN_NULL(char, module_len+1, mtArguments);
2325 if (module_name != NULL) {
2326 memcpy(module_name, patch_mod_tail, module_len);
2327 *(module_name + module_len) = '\0';
2328 // The path piece begins one past the module_equal sign
2329 add_patch_mod_prefix(module_name, module_equal + 1, patch_mod_javabase);
2330 FREE_C_HEAP_ARRAY(char, module_name);
2331 if (!create_numbered_property("jdk.module.patch", patch_mod_tail, patch_mod_count++)) {
2332 return JNI_ENOMEM;
2333 }
2334 } else {
2335 return JNI_ENOMEM;
2336 }
2337 }
2338 return JNI_OK;
2339 }
2340
2341 // Parse -Xss memory string parameter and convert to ThreadStackSize in K.
2342 jint Arguments::parse_xss(const JavaVMOption* option, const char* tail, intx* out_ThreadStackSize) {
2343 // The min and max sizes match the values in globals.hpp, but scaled
2344 // with K. The values have been chosen so that alignment with page
2345 // size doesn't change the max value, which makes the conversions
2346 // back and forth between Xss value and ThreadStackSize value easier.
2347 // The values have also been chosen to fit inside a 32-bit signed type.
2348 const julong min_ThreadStackSize = 0;
2349 const julong max_ThreadStackSize = 1 * M;
2350
2351 const julong min_size = min_ThreadStackSize * K;
2352 const julong max_size = max_ThreadStackSize * K;
2353
2354 assert(is_aligned(max_size, os::vm_page_size()), "Implementation assumption");
2355
2356 julong size = 0;
2357 ArgsRange errcode = parse_memory_size(tail, &size, min_size, max_size);
2358 if (errcode != arg_in_range) {
2359 bool silent = (option == NULL); // Allow testing to silence error messages
2360 if (!silent) {
2361 jio_fprintf(defaultStream::error_stream(),
2362 "Invalid thread stack size: %s\n", option->optionString);
2363 describe_range_error(errcode);
2364 }
2365 return JNI_EINVAL;
2366 }
2367
2368 // Internally track ThreadStackSize in units of 1024 bytes.
2369 const julong size_aligned = align_up(size, K);
2370 assert(size <= size_aligned,
2371 "Overflow: " JULONG_FORMAT " " JULONG_FORMAT,
2372 size, size_aligned);
2373
2374 const julong size_in_K = size_aligned / K;
2375 assert(size_in_K < (julong)max_intx,
2376 "size_in_K doesn't fit in the type of ThreadStackSize: " JULONG_FORMAT,
2377 size_in_K);
2378
2379 // Check that code expanding ThreadStackSize to a page aligned number of bytes won't overflow.
2380 const julong max_expanded = align_up(size_in_K * K, os::vm_page_size());
2381 assert(max_expanded < max_uintx && max_expanded >= size_in_K,
2382 "Expansion overflowed: " JULONG_FORMAT " " JULONG_FORMAT,
2383 max_expanded, size_in_K);
2384
2385 *out_ThreadStackSize = (intx)size_in_K;
2386
2387 return JNI_OK;
2388 }
2389
2390 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, bool* patch_mod_javabase, JVMFlag::Flags origin) {
2391 // For match_option to return remaining or value part of option string
2392 const char* tail;
2393
2394 // iterate over arguments
2395 for (int index = 0; index < args->nOptions; index++) {
2396 bool is_absolute_path = false; // for -agentpath vs -agentlib
2397
2398 const JavaVMOption* option = args->options + index;
2399
2400 if (!match_option(option, "-Djava.class.path", &tail) &&
2401 !match_option(option, "-Dsun.java.command", &tail) &&
2402 !match_option(option, "-Dsun.java.launcher", &tail)) {
2403
2404 // add all jvm options to the jvm_args string. This string
2405 // is used later to set the java.vm.args PerfData string constant.
2406 // the -Djava.class.path and the -Dsun.java.command options are
2407 // omitted from jvm_args string as each have their own PerfData
2408 // string constant object.
2409 build_jvm_args(option->optionString);
2410 }
2411
2412 // -verbose:[class/module/gc/jni]
2413 if (match_option(option, "-verbose", &tail)) {
2414 if (!strcmp(tail, ":class") || !strcmp(tail, "")) {
2415 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, load));
2416 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, unload));
2417 } else if (!strcmp(tail, ":module")) {
2418 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, load));
2419 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, unload));
2420 } else if (!strcmp(tail, ":gc")) {
2421 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
2422 } else if (!strcmp(tail, ":jni")) {
2423 if (FLAG_SET_CMDLINE(bool, PrintJNIResolving, true) != JVMFlag::SUCCESS) {
2424 return JNI_EINVAL;
2425 }
2426 }
2427 // -da / -ea / -disableassertions / -enableassertions
2428 // These accept an optional class/package name separated by a colon, e.g.,
2429 // -da:java.lang.Thread.
2430 } else if (match_option(option, user_assertion_options, &tail, true)) {
2431 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2432 if (*tail == '\0') {
2433 JavaAssertions::setUserClassDefault(enable);
2434 } else {
2435 assert(*tail == ':', "bogus match by match_option()");
2436 JavaAssertions::addOption(tail + 1, enable);
2437 }
2438 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions
2439 } else if (match_option(option, system_assertion_options, &tail, false)) {
2440 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2441 JavaAssertions::setSystemClassDefault(enable);
2442 // -bootclasspath:
2443 } else if (match_option(option, "-Xbootclasspath:", &tail)) {
2444 jio_fprintf(defaultStream::output_stream(),
2445 "-Xbootclasspath is no longer a supported option.\n");
2446 return JNI_EINVAL;
2447 // -bootclasspath/a:
2448 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) {
2449 Arguments::append_sysclasspath(tail);
2450 // -bootclasspath/p:
2451 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) {
2452 jio_fprintf(defaultStream::output_stream(),
2453 "-Xbootclasspath/p is no longer a supported option.\n");
2454 return JNI_EINVAL;
2455 // -Xrun
2456 } else if (match_option(option, "-Xrun", &tail)) {
2457 if (tail != NULL) {
2458 const char* pos = strchr(tail, ':');
2459 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2460 char* name = NEW_C_HEAP_ARRAY(char, len + 1, mtArguments);
2461 jio_snprintf(name, len + 1, "%s", tail);
2462
2463 char *options = NULL;
2464 if(pos != NULL) {
2465 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied.
2466 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtArguments), pos+1, len2);
2467 }
2468 #if !INCLUDE_JVMTI
2469 if (strcmp(name, "jdwp") == 0) {
2470 jio_fprintf(defaultStream::error_stream(),
2471 "Debugging agents are not supported in this VM\n");
2472 return JNI_ERR;
2473 }
2474 #endif // !INCLUDE_JVMTI
2475 add_init_library(name, options);
2476 }
2477 } else if (match_option(option, "--add-reads=", &tail)) {
2478 if (!create_numbered_property("jdk.module.addreads", tail, addreads_count++)) {
2479 return JNI_ENOMEM;
2480 }
2481 } else if (match_option(option, "--add-exports=", &tail)) {
2482 if (!create_numbered_property("jdk.module.addexports", tail, addexports_count++)) {
2483 return JNI_ENOMEM;
2484 }
2485 } else if (match_option(option, "--add-opens=", &tail)) {
2486 if (!create_numbered_property("jdk.module.addopens", tail, addopens_count++)) {
2487 return JNI_ENOMEM;
2488 }
2489 } else if (match_option(option, "--add-modules=", &tail)) {
2490 if (!create_numbered_property("jdk.module.addmods", tail, addmods_count++)) {
2491 return JNI_ENOMEM;
2492 }
2493 } else if (match_option(option, "--limit-modules=", &tail)) {
2494 if (!create_property("jdk.module.limitmods", tail, InternalProperty)) {
2495 return JNI_ENOMEM;
2496 }
2497 } else if (match_option(option, "--module-path=", &tail)) {
2498 if (!create_property("jdk.module.path", tail, ExternalProperty)) {
2499 return JNI_ENOMEM;
2500 }
2501 } else if (match_option(option, "--upgrade-module-path=", &tail)) {
2502 if (!create_property("jdk.module.upgrade.path", tail, ExternalProperty)) {
2503 return JNI_ENOMEM;
2504 }
2505 } else if (match_option(option, "--patch-module=", &tail)) {
2506 // --patch-module=<module>=<file>(<pathsep><file>)*
2507 int res = process_patch_mod_option(tail, patch_mod_javabase);
2508 if (res != JNI_OK) {
2509 return res;
2510 }
2511 } else if (match_option(option, "--illegal-access=", &tail)) {
2512 if (!create_property("jdk.module.illegalAccess", tail, ExternalProperty)) {
2513 return JNI_ENOMEM;
2514 }
2515 // -agentlib and -agentpath
2516 } else if (match_option(option, "-agentlib:", &tail) ||
2517 (is_absolute_path = match_option(option, "-agentpath:", &tail))) {
2518 if(tail != NULL) {
2519 const char* pos = strchr(tail, '=');
2520 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2521 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtArguments), tail, len);
2522 name[len] = '\0';
2523
2524 char *options = NULL;
2525 if(pos != NULL) {
2526 options = os::strdup_check_oom(pos + 1, mtArguments);
2527 }
2528 #if !INCLUDE_JVMTI
2529 if (valid_jdwp_agent(name, is_absolute_path)) {
2530 jio_fprintf(defaultStream::error_stream(),
2531 "Debugging agents are not supported in this VM\n");
2532 return JNI_ERR;
2533 }
2534 #endif // !INCLUDE_JVMTI
2535 add_init_agent(name, options, is_absolute_path);
2536 }
2537 // -javaagent
2538 } else if (match_option(option, "-javaagent:", &tail)) {
2539 #if !INCLUDE_JVMTI
2540 jio_fprintf(defaultStream::error_stream(),
2541 "Instrumentation agents are not supported in this VM\n");
2542 return JNI_ERR;
2543 #else
2544 if (tail != NULL) {
2545 size_t length = strlen(tail) + 1;
2546 char *options = NEW_C_HEAP_ARRAY(char, length, mtArguments);
2547 jio_snprintf(options, length, "%s", tail);
2548 add_instrument_agent("instrument", options, false);
2549 // java agents need module java.instrument
2550 if (!create_numbered_property("jdk.module.addmods", "java.instrument", addmods_count++)) {
2551 return JNI_ENOMEM;
2552 }
2553 }
2554 #endif // !INCLUDE_JVMTI
2555 // --enable_preview
2556 } else if (match_option(option, "--enable-preview")) {
2557 set_enable_preview();
2558 // -Xnoclassgc
2559 } else if (match_option(option, "-Xnoclassgc")) {
2560 if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != JVMFlag::SUCCESS) {
2561 return JNI_EINVAL;
2562 }
2563 // -Xconcgc
2564 } else if (match_option(option, "-Xconcgc")) {
2565 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true) != JVMFlag::SUCCESS) {
2566 return JNI_EINVAL;
2567 }
2568 handle_extra_cms_flags("-Xconcgc uses UseConcMarkSweepGC");
2569 // -Xnoconcgc
2570 } else if (match_option(option, "-Xnoconcgc")) {
2571 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false) != JVMFlag::SUCCESS) {
2572 return JNI_EINVAL;
2573 }
2574 handle_extra_cms_flags("-Xnoconcgc uses UseConcMarkSweepGC");
2575 // -Xbatch
2576 } else if (match_option(option, "-Xbatch")) {
2577 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != JVMFlag::SUCCESS) {
2578 return JNI_EINVAL;
2579 }
2580 // -Xmn for compatibility with other JVM vendors
2581 } else if (match_option(option, "-Xmn", &tail)) {
2582 julong long_initial_young_size = 0;
2583 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1);
2584 if (errcode != arg_in_range) {
2585 jio_fprintf(defaultStream::error_stream(),
2586 "Invalid initial young generation size: %s\n", option->optionString);
2587 describe_range_error(errcode);
2588 return JNI_EINVAL;
2589 }
2590 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, (size_t)long_initial_young_size) != JVMFlag::SUCCESS) {
2591 return JNI_EINVAL;
2592 }
2593 if (FLAG_SET_CMDLINE(size_t, NewSize, (size_t)long_initial_young_size) != JVMFlag::SUCCESS) {
2594 return JNI_EINVAL;
2595 }
2596 // -Xms
2597 } else if (match_option(option, "-Xms", &tail)) {
2598 julong long_initial_heap_size = 0;
2599 // an initial heap size of 0 means automatically determine
2600 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0);
2601 if (errcode != arg_in_range) {
2602 jio_fprintf(defaultStream::error_stream(),
2603 "Invalid initial heap size: %s\n", option->optionString);
2604 describe_range_error(errcode);
2605 return JNI_EINVAL;
2606 }
2607 set_min_heap_size((size_t)long_initial_heap_size);
2608 // Currently the minimum size and the initial heap sizes are the same.
2609 // Can be overridden with -XX:InitialHeapSize.
2610 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, (size_t)long_initial_heap_size) != JVMFlag::SUCCESS) {
2611 return JNI_EINVAL;
2612 }
2613 // -Xmx
2614 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) {
2615 julong long_max_heap_size = 0;
2616 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1);
2617 if (errcode != arg_in_range) {
2618 jio_fprintf(defaultStream::error_stream(),
2619 "Invalid maximum heap size: %s\n", option->optionString);
2620 describe_range_error(errcode);
2621 return JNI_EINVAL;
2622 }
2623 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, (size_t)long_max_heap_size) != JVMFlag::SUCCESS) {
2624 return JNI_EINVAL;
2625 }
2626 // Xmaxf
2627 } else if (match_option(option, "-Xmaxf", &tail)) {
2628 char* err;
2629 int maxf = (int)(strtod(tail, &err) * 100);
2630 if (*err != '\0' || *tail == '\0') {
2631 jio_fprintf(defaultStream::error_stream(),
2632 "Bad max heap free percentage size: %s\n",
2633 option->optionString);
2634 return JNI_EINVAL;
2635 } else {
2636 if (FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf) != JVMFlag::SUCCESS) {
2637 return JNI_EINVAL;
2638 }
2639 }
2640 // Xminf
2641 } else if (match_option(option, "-Xminf", &tail)) {
2642 char* err;
2643 int minf = (int)(strtod(tail, &err) * 100);
2644 if (*err != '\0' || *tail == '\0') {
2645 jio_fprintf(defaultStream::error_stream(),
2646 "Bad min heap free percentage size: %s\n",
2647 option->optionString);
2648 return JNI_EINVAL;
2649 } else {
2650 if (FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf) != JVMFlag::SUCCESS) {
2651 return JNI_EINVAL;
2652 }
2653 }
2654 // -Xss
2655 } else if (match_option(option, "-Xss", &tail)) {
2656 intx value = 0;
2657 jint err = parse_xss(option, tail, &value);
2658 if (err != JNI_OK) {
2659 return err;
2660 }
2661 if (FLAG_SET_CMDLINE(intx, ThreadStackSize, value) != JVMFlag::SUCCESS) {
2662 return JNI_EINVAL;
2663 }
2664 } else if (match_option(option, "-Xmaxjitcodesize", &tail) ||
2665 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) {
2666 julong long_ReservedCodeCacheSize = 0;
2667
2668 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1);
2669 if (errcode != arg_in_range) {
2670 jio_fprintf(defaultStream::error_stream(),
2671 "Invalid maximum code cache size: %s.\n", option->optionString);
2672 return JNI_EINVAL;
2673 }
2674 if (FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != JVMFlag::SUCCESS) {
2675 return JNI_EINVAL;
2676 }
2677 // -green
2678 } else if (match_option(option, "-green")) {
2679 jio_fprintf(defaultStream::error_stream(),
2680 "Green threads support not available\n");
2681 return JNI_EINVAL;
2682 // -native
2683 } else if (match_option(option, "-native")) {
2684 // HotSpot always uses native threads, ignore silently for compatibility
2685 // -Xrs
2686 } else if (match_option(option, "-Xrs")) {
2687 // Classic/EVM option, new functionality
2688 if (FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true) != JVMFlag::SUCCESS) {
2689 return JNI_EINVAL;
2690 }
2691 // -Xprof
2692 } else if (match_option(option, "-Xprof")) {
2693 char version[256];
2694 // Obsolete in JDK 10
2695 JDK_Version::jdk(10).to_string(version, sizeof(version));
2696 warning("Ignoring option %s; support was removed in %s", option->optionString, version);
2697 // -Xconcurrentio
2698 } else if (match_option(option, "-Xconcurrentio")) {
2699 if (FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true) != JVMFlag::SUCCESS) {
2700 return JNI_EINVAL;
2701 }
2702 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != JVMFlag::SUCCESS) {
2703 return JNI_EINVAL;
2704 }
2705 SafepointSynchronize::set_defer_thr_suspend_loop_count();
2706 if (FLAG_SET_CMDLINE(bool, UseTLAB, false) != JVMFlag::SUCCESS) {
2707 return JNI_EINVAL;
2708 }
2709 if (FLAG_SET_CMDLINE(size_t, NewSizeThreadIncrease, 16 * K) != JVMFlag::SUCCESS) { // 20Kb per thread added to new generation
2710 return JNI_EINVAL;
2711 }
2712
2713 // -Xinternalversion
2714 } else if (match_option(option, "-Xinternalversion")) {
2715 jio_fprintf(defaultStream::output_stream(), "%s\n",
2716 VM_Version::internal_vm_info_string());
2717 vm_exit(0);
2718 #ifndef PRODUCT
2719 // -Xprintflags
2720 } else if (match_option(option, "-Xprintflags")) {
2721 JVMFlag::printFlags(tty, false);
2722 vm_exit(0);
2723 #endif
2724 // -D
2725 } else if (match_option(option, "-D", &tail)) {
2726 const char* value;
2727 if (match_option(option, "-Djava.endorsed.dirs=", &value) &&
2728 *value!= '\0' && strcmp(value, "\"\"") != 0) {
2729 // abort if -Djava.endorsed.dirs is set
2730 jio_fprintf(defaultStream::output_stream(),
2731 "-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n"
2732 "in modular form will be supported via the concept of upgradeable modules.\n", value);
2733 return JNI_EINVAL;
2734 }
2735 if (match_option(option, "-Djava.ext.dirs=", &value) &&
2736 *value != '\0' && strcmp(value, "\"\"") != 0) {
2737 // abort if -Djava.ext.dirs is set
2738 jio_fprintf(defaultStream::output_stream(),
2739 "-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value);
2740 return JNI_EINVAL;
2741 }
2742 // Check for module related properties. They must be set using the modules
2743 // options. For example: use "--add-modules=java.sql", not
2744 // "-Djdk.module.addmods=java.sql"
2745 if (is_internal_module_property(option->optionString + 2)) {
2746 needs_module_property_warning = true;
2747 continue;
2748 }
2749
2750 if (!add_property(tail)) {
2751 return JNI_ENOMEM;
2752 }
2753 // Out of the box management support
2754 if (match_option(option, "-Dcom.sun.management", &tail)) {
2755 #if INCLUDE_MANAGEMENT
2756 if (FLAG_SET_CMDLINE(bool, ManagementServer, true) != JVMFlag::SUCCESS) {
2757 return JNI_EINVAL;
2758 }
2759 // management agent in module jdk.management.agent
2760 if (!create_numbered_property("jdk.module.addmods", "jdk.management.agent", addmods_count++)) {
2761 return JNI_ENOMEM;
2762 }
2763 #else
2764 jio_fprintf(defaultStream::output_stream(),
2765 "-Dcom.sun.management is not supported in this VM.\n");
2766 return JNI_ERR;
2767 #endif
2768 }
2769 // -Xint
2770 } else if (match_option(option, "-Xint")) {
2771 set_mode_flags(_int);
2772 // -Xmixed
2773 } else if (match_option(option, "-Xmixed")) {
2774 set_mode_flags(_mixed);
2775 // -Xcomp
2776 } else if (match_option(option, "-Xcomp")) {
2777 // for testing the compiler; turn off all flags that inhibit compilation
2778 set_mode_flags(_comp);
2779 // -Xshare:dump
2780 } else if (match_option(option, "-Xshare:dump")) {
2781 if (FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true) != JVMFlag::SUCCESS) {
2782 return JNI_EINVAL;
2783 }
2784 set_mode_flags(_int); // Prevent compilation, which creates objects
2785 // -Xshare:on
2786 } else if (match_option(option, "-Xshare:on")) {
2787 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != JVMFlag::SUCCESS) {
2788 return JNI_EINVAL;
2789 }
2790 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != JVMFlag::SUCCESS) {
2791 return JNI_EINVAL;
2792 }
2793 // -Xshare:auto
2794 } else if (match_option(option, "-Xshare:auto")) {
2795 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != JVMFlag::SUCCESS) {
2796 return JNI_EINVAL;
2797 }
2798 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != JVMFlag::SUCCESS) {
2799 return JNI_EINVAL;
2800 }
2801 // -Xshare:off
2802 } else if (match_option(option, "-Xshare:off")) {
2803 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, false) != JVMFlag::SUCCESS) {
2804 return JNI_EINVAL;
2805 }
2806 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != JVMFlag::SUCCESS) {
2807 return JNI_EINVAL;
2808 }
2809 // -Xverify
2810 } else if (match_option(option, "-Xverify", &tail)) {
2811 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) {
2812 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true) != JVMFlag::SUCCESS) {
2813 return JNI_EINVAL;
2814 }
2815 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != JVMFlag::SUCCESS) {
2816 return JNI_EINVAL;
2817 }
2818 } else if (strcmp(tail, ":remote") == 0) {
2819 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != JVMFlag::SUCCESS) {
2820 return JNI_EINVAL;
2821 }
2822 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != JVMFlag::SUCCESS) {
2823 return JNI_EINVAL;
2824 }
2825 } else if (strcmp(tail, ":none") == 0) {
2826 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != JVMFlag::SUCCESS) {
2827 return JNI_EINVAL;
2828 }
2829 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false) != JVMFlag::SUCCESS) {
2830 return JNI_EINVAL;
2831 }
2832 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) {
2833 return JNI_EINVAL;
2834 }
2835 // -Xdebug
2836 } else if (match_option(option, "-Xdebug")) {
2837 // note this flag has been used, then ignore
2838 set_xdebug_mode(true);
2839 // -Xnoagent
2840 } else if (match_option(option, "-Xnoagent")) {
2841 // For compatibility with classic. HotSpot refuses to load the old style agent.dll.
2842 } else if (match_option(option, "-Xloggc:", &tail)) {
2843 // Deprecated flag to redirect GC output to a file. -Xloggc:<filename>
2844 log_warning(gc)("-Xloggc is deprecated. Will use -Xlog:gc:%s instead.", tail);
2845 _gc_log_filename = os::strdup_check_oom(tail);
2846 } else if (match_option(option, "-Xlog", &tail)) {
2847 bool ret = false;
2848 if (strcmp(tail, ":help") == 0) {
2849 fileStream stream(defaultStream::output_stream());
2850 LogConfiguration::print_command_line_help(&stream);
2851 vm_exit(0);
2852 } else if (strcmp(tail, ":disable") == 0) {
2853 LogConfiguration::disable_logging();
2854 ret = true;
2855 } else if (*tail == '\0') {
2856 ret = LogConfiguration::parse_command_line_arguments();
2857 assert(ret, "-Xlog without arguments should never fail to parse");
2858 } else if (*tail == ':') {
2859 ret = LogConfiguration::parse_command_line_arguments(tail + 1);
2860 }
2861 if (ret == false) {
2862 jio_fprintf(defaultStream::error_stream(),
2863 "Invalid -Xlog option '-Xlog%s', see error log for details.\n",
2864 tail);
2865 return JNI_EINVAL;
2866 }
2867 // JNI hooks
2868 } else if (match_option(option, "-Xcheck", &tail)) {
2869 if (!strcmp(tail, ":jni")) {
2870 #if !INCLUDE_JNI_CHECK
2871 warning("JNI CHECKING is not supported in this VM");
2872 #else
2873 CheckJNICalls = true;
2874 #endif // INCLUDE_JNI_CHECK
2875 } else if (is_bad_option(option, args->ignoreUnrecognized,
2876 "check")) {
2877 return JNI_EINVAL;
2878 }
2879 } else if (match_option(option, "vfprintf")) {
2880 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo);
2881 } else if (match_option(option, "exit")) {
2882 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo);
2883 } else if (match_option(option, "abort")) {
2884 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo);
2885 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure;
2886 // and the last option wins.
2887 } else if (match_option(option, "-XX:+NeverTenure")) {
2888 if (FLAG_SET_CMDLINE(bool, NeverTenure, true) != JVMFlag::SUCCESS) {
2889 return JNI_EINVAL;
2890 }
2891 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != JVMFlag::SUCCESS) {
2892 return JNI_EINVAL;
2893 }
2894 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1) != JVMFlag::SUCCESS) {
2895 return JNI_EINVAL;
2896 }
2897 } else if (match_option(option, "-XX:+AlwaysTenure")) {
2898 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != JVMFlag::SUCCESS) {
2899 return JNI_EINVAL;
2900 }
2901 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != JVMFlag::SUCCESS) {
2902 return JNI_EINVAL;
2903 }
2904 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0) != JVMFlag::SUCCESS) {
2905 return JNI_EINVAL;
2906 }
2907 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) {
2908 uintx max_tenuring_thresh = 0;
2909 if (!parse_uintx(tail, &max_tenuring_thresh, 0)) {
2910 jio_fprintf(defaultStream::error_stream(),
2911 "Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail);
2912 return JNI_EINVAL;
2913 }
2914
2915 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh) != JVMFlag::SUCCESS) {
2916 return JNI_EINVAL;
2917 }
2918
2919 if (MaxTenuringThreshold == 0) {
2920 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != JVMFlag::SUCCESS) {
2921 return JNI_EINVAL;
2922 }
2923 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != JVMFlag::SUCCESS) {
2924 return JNI_EINVAL;
2925 }
2926 } else {
2927 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != JVMFlag::SUCCESS) {
2928 return JNI_EINVAL;
2929 }
2930 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != JVMFlag::SUCCESS) {
2931 return JNI_EINVAL;
2932 }
2933 }
2934 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) {
2935 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false) != JVMFlag::SUCCESS) {
2936 return JNI_EINVAL;
2937 }
2938 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true) != JVMFlag::SUCCESS) {
2939 return JNI_EINVAL;
2940 }
2941 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) {
2942 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false) != JVMFlag::SUCCESS) {
2943 return JNI_EINVAL;
2944 }
2945 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true) != JVMFlag::SUCCESS) {
2946 return JNI_EINVAL;
2947 }
2948 } else if (match_option(option, "-XX:+ExtendedDTraceProbes")) {
2949 #if defined(DTRACE_ENABLED)
2950 if (FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true) != JVMFlag::SUCCESS) {
2951 return JNI_EINVAL;
2952 }
2953 if (FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true) != JVMFlag::SUCCESS) {
2954 return JNI_EINVAL;
2955 }
2956 if (FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true) != JVMFlag::SUCCESS) {
2957 return JNI_EINVAL;
2958 }
2959 if (FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true) != JVMFlag::SUCCESS) {
2960 return JNI_EINVAL;
2961 }
2962 #else // defined(DTRACE_ENABLED)
2963 jio_fprintf(defaultStream::error_stream(),
2964 "ExtendedDTraceProbes flag is not applicable for this configuration\n");
2965 return JNI_EINVAL;
2966 #endif // defined(DTRACE_ENABLED)
2967 #ifdef ASSERT
2968 } else if (match_option(option, "-XX:+FullGCALot")) {
2969 if (FLAG_SET_CMDLINE(bool, FullGCALot, true) != JVMFlag::SUCCESS) {
2970 return JNI_EINVAL;
2971 }
2972 // disable scavenge before parallel mark-compact
2973 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != JVMFlag::SUCCESS) {
2974 return JNI_EINVAL;
2975 }
2976 #endif
2977 #if !INCLUDE_MANAGEMENT
2978 } else if (match_option(option, "-XX:+ManagementServer")) {
2979 jio_fprintf(defaultStream::error_stream(),
2980 "ManagementServer is not supported in this VM.\n");
2981 return JNI_ERR;
2982 #endif // INCLUDE_MANAGEMENT
2983 #if INCLUDE_JFR
2984 } else if (match_jfr_option(&option)) {
2985 return JNI_EINVAL;
2986 #endif
2987 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx
2988 // Skip -XX:Flags= and -XX:VMOptionsFile= since those cases have
2989 // already been handled
2990 if ((strncmp(tail, "Flags=", strlen("Flags=")) != 0) &&
2991 (strncmp(tail, "VMOptionsFile=", strlen("VMOptionsFile=")) != 0)) {
2992 if (!process_argument(tail, args->ignoreUnrecognized, origin)) {
2993 return JNI_EINVAL;
2994 }
2995 }
2996 // Unknown option
2997 } else if (is_bad_option(option, args->ignoreUnrecognized)) {
2998 return JNI_ERR;
2999 }
3000 }
3001
3002 if (EnableValhalla) {
3003 if (!create_property("valhalla.enableValhalla", "true", InternalProperty)) {
3004 return JNI_ENOMEM;
3005 }
3006 }
3007
3008 // PrintSharedArchiveAndExit will turn on
3009 // -Xshare:on
3010 // -Xlog:class+path=info
3011 if (PrintSharedArchiveAndExit) {
3012 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != JVMFlag::SUCCESS) {
3013 return JNI_EINVAL;
3014 }
3015 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != JVMFlag::SUCCESS) {
3016 return JNI_EINVAL;
3017 }
3018 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, path));
3019 }
3020
3021 // Change the default value for flags which have different default values
3022 // when working with older JDKs.
3023 #ifdef LINUX
3024 if (JDK_Version::current().compare_major(6) <= 0 &&
3025 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) {
3026 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false);
3027 }
3028 #endif // LINUX
3029 fix_appclasspath();
3030 return JNI_OK;
3031 }
3032
3033 void Arguments::add_patch_mod_prefix(const char* module_name, const char* path, bool* patch_mod_javabase) {
3034 // For java.base check for duplicate --patch-module options being specified on the command line.
3035 // This check is only required for java.base, all other duplicate module specifications
3036 // will be checked during module system initialization. The module system initialization
3037 // will throw an ExceptionInInitializerError if this situation occurs.
3038 if (strcmp(module_name, JAVA_BASE_NAME) == 0) {
3039 if (*patch_mod_javabase) {
3040 vm_exit_during_initialization("Cannot specify " JAVA_BASE_NAME " more than once to --patch-module");
3041 } else {
3042 *patch_mod_javabase = true;
3043 }
3044 }
3045
3046 // Create GrowableArray lazily, only if --patch-module has been specified
3047 if (_patch_mod_prefix == NULL) {
3048 _patch_mod_prefix = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<ModulePatchPath*>(10, true);
3049 }
3050
3051 _patch_mod_prefix->push(new ModulePatchPath(module_name, path));
3052 }
3053
3054 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled)
3055 //
3056 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar
3057 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar".
3058 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty
3059 // path is treated as the current directory.
3060 //
3061 // This causes problems with CDS, which requires that all directories specified in the classpath
3062 // must be empty. In most cases, applications do NOT want to load classes from the current
3063 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up
3064 // scripts compatible with CDS.
3065 void Arguments::fix_appclasspath() {
3066 if (IgnoreEmptyClassPaths) {
3067 const char separator = *os::path_separator();
3068 const char* src = _java_class_path->value();
3069
3070 // skip over all the leading empty paths
3071 while (*src == separator) {
3072 src ++;
3073 }
3074
3075 char* copy = os::strdup_check_oom(src, mtArguments);
3076
3077 // trim all trailing empty paths
3078 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) {
3079 *tail = '\0';
3080 }
3081
3082 char from[3] = {separator, separator, '\0'};
3083 char to [2] = {separator, '\0'};
3084 while (StringUtils::replace_no_expand(copy, from, to) > 0) {
3085 // Keep replacing "::" -> ":" until we have no more "::" (non-windows)
3086 // Keep replacing ";;" -> ";" until we have no more ";;" (windows)
3087 }
3088
3089 _java_class_path->set_writeable_value(copy);
3090 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore
3091 }
3092 }
3093
3094 jint Arguments::finalize_vm_init_args(bool patch_mod_javabase) {
3095 // check if the default lib/endorsed directory exists; if so, error
3096 char path[JVM_MAXPATHLEN];
3097 const char* fileSep = os::file_separator();
3098 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep);
3099
3100 DIR* dir = os::opendir(path);
3101 if (dir != NULL) {
3102 jio_fprintf(defaultStream::output_stream(),
3103 "<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n"
3104 "in modular form will be supported via the concept of upgradeable modules.\n");
3105 os::closedir(dir);
3106 return JNI_ERR;
3107 }
3108
3109 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep);
3110 dir = os::opendir(path);
3111 if (dir != NULL) {
3112 jio_fprintf(defaultStream::output_stream(),
3113 "<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; "
3114 "Use -classpath instead.\n.");
3115 os::closedir(dir);
3116 return JNI_ERR;
3117 }
3118
3119 // This must be done after all arguments have been processed
3120 // and the container support has been initialized since AggressiveHeap
3121 // relies on the amount of total memory available.
3122 if (AggressiveHeap) {
3123 jint result = set_aggressive_heap_flags();
3124 if (result != JNI_OK) {
3125 return result;
3126 }
3127 }
3128
3129 // This must be done after all arguments have been processed.
3130 // java_compiler() true means set to "NONE" or empty.
3131 if (java_compiler() && !xdebug_mode()) {
3132 // For backwards compatibility, we switch to interpreted mode if
3133 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was
3134 // not specified.
3135 set_mode_flags(_int);
3136 }
3137
3138 // CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode),
3139 // but like -Xint, leave compilation thresholds unaffected.
3140 // With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well.
3141 if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) {
3142 set_mode_flags(_int);
3143 }
3144
3145 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set
3146 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) {
3147 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold);
3148 }
3149
3150 #if !COMPILER2_OR_JVMCI
3151 // Don't degrade server performance for footprint
3152 if (FLAG_IS_DEFAULT(UseLargePages) &&
3153 MaxHeapSize < LargePageHeapSizeThreshold) {
3154 // No need for large granularity pages w/small heaps.
3155 // Note that large pages are enabled/disabled for both the
3156 // Java heap and the code cache.
3157 FLAG_SET_DEFAULT(UseLargePages, false);
3158 }
3159
3160 UNSUPPORTED_OPTION(ProfileInterpreter);
3161 NOT_PRODUCT(UNSUPPORTED_OPTION(TraceProfileInterpreter));
3162 #endif
3163
3164 #ifndef TIERED
3165 // Tiered compilation is undefined.
3166 UNSUPPORTED_OPTION(TieredCompilation);
3167 #endif
3168
3169 if (!check_vm_args_consistency()) {
3170 return JNI_ERR;
3171 }
3172
3173 #if INCLUDE_CDS
3174 if (DumpSharedSpaces) {
3175 // Disable biased locking now as it interferes with the clean up of
3176 // the archived Klasses and Java string objects (at dump time only).
3177 UseBiasedLocking = false;
3178
3179 // Always verify non-system classes during CDS dump
3180 if (!BytecodeVerificationRemote) {
3181 BytecodeVerificationRemote = true;
3182 log_info(cds)("All non-system classes will be verified (-Xverify:remote) during CDS dump time.");
3183 }
3184 }
3185 if (UseSharedSpaces && patch_mod_javabase) {
3186 no_shared_spaces("CDS is disabled when " JAVA_BASE_NAME " module is patched.");
3187 }
3188 if (UseSharedSpaces && !DumpSharedSpaces && check_unsupported_cds_runtime_properties()) {
3189 FLAG_SET_DEFAULT(UseSharedSpaces, false);
3190 }
3191 #endif
3192
3193 #ifndef CAN_SHOW_REGISTERS_ON_ASSERT
3194 UNSUPPORTED_OPTION(ShowRegistersOnAssert);
3195 #endif // CAN_SHOW_REGISTERS_ON_ASSERT
3196
3197 return JNI_OK;
3198 }
3199
3200 // Helper class for controlling the lifetime of JavaVMInitArgs
3201 // objects. The contents of the JavaVMInitArgs are guaranteed to be
3202 // deleted on the destruction of the ScopedVMInitArgs object.
3203 class ScopedVMInitArgs : public StackObj {
3204 private:
3205 JavaVMInitArgs _args;
3206 char* _container_name;
3207 bool _is_set;
3208 char* _vm_options_file_arg;
3209
3210 public:
3211 ScopedVMInitArgs(const char *container_name) {
3212 _args.version = JNI_VERSION_1_2;
3213 _args.nOptions = 0;
3214 _args.options = NULL;
3215 _args.ignoreUnrecognized = false;
3216 _container_name = (char *)container_name;
3217 _is_set = false;
3218 _vm_options_file_arg = NULL;
3219 }
3220
3221 // Populates the JavaVMInitArgs object represented by this
3222 // ScopedVMInitArgs object with the arguments in options. The
3223 // allocated memory is deleted by the destructor. If this method
3224 // returns anything other than JNI_OK, then this object is in a
3225 // partially constructed state, and should be abandoned.
3226 jint set_args(GrowableArray<JavaVMOption>* options) {
3227 _is_set = true;
3228 JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL(
3229 JavaVMOption, options->length(), mtArguments);
3230 if (options_arr == NULL) {
3231 return JNI_ENOMEM;
3232 }
3233 _args.options = options_arr;
3234
3235 for (int i = 0; i < options->length(); i++) {
3236 options_arr[i] = options->at(i);
3237 options_arr[i].optionString = os::strdup(options_arr[i].optionString);
3238 if (options_arr[i].optionString == NULL) {
3239 // Rely on the destructor to do cleanup.
3240 _args.nOptions = i;
3241 return JNI_ENOMEM;
3242 }
3243 }
3244
3245 _args.nOptions = options->length();
3246 _args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions;
3247 return JNI_OK;
3248 }
3249
3250 JavaVMInitArgs* get() { return &_args; }
3251 char* container_name() { return _container_name; }
3252 bool is_set() { return _is_set; }
3253 bool found_vm_options_file_arg() { return _vm_options_file_arg != NULL; }
3254 char* vm_options_file_arg() { return _vm_options_file_arg; }
3255
3256 void set_vm_options_file_arg(const char *vm_options_file_arg) {
3257 if (_vm_options_file_arg != NULL) {
3258 os::free(_vm_options_file_arg);
3259 }
3260 _vm_options_file_arg = os::strdup_check_oom(vm_options_file_arg);
3261 }
3262
3263 ~ScopedVMInitArgs() {
3264 if (_vm_options_file_arg != NULL) {
3265 os::free(_vm_options_file_arg);
3266 }
3267 if (_args.options == NULL) return;
3268 for (int i = 0; i < _args.nOptions; i++) {
3269 os::free(_args.options[i].optionString);
3270 }
3271 FREE_C_HEAP_ARRAY(JavaVMOption, _args.options);
3272 }
3273
3274 // Insert options into this option list, to replace option at
3275 // vm_options_file_pos (-XX:VMOptionsFile)
3276 jint insert(const JavaVMInitArgs* args,
3277 const JavaVMInitArgs* args_to_insert,
3278 const int vm_options_file_pos) {
3279 assert(_args.options == NULL, "shouldn't be set yet");
3280 assert(args_to_insert->nOptions != 0, "there should be args to insert");
3281 assert(vm_options_file_pos != -1, "vm_options_file_pos should be set");
3282
3283 int length = args->nOptions + args_to_insert->nOptions - 1;
3284 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments)
3285 GrowableArray<JavaVMOption>(length, true); // Construct new option array
3286 for (int i = 0; i < args->nOptions; i++) {
3287 if (i == vm_options_file_pos) {
3288 // insert the new options starting at the same place as the
3289 // -XX:VMOptionsFile option
3290 for (int j = 0; j < args_to_insert->nOptions; j++) {
3291 options->push(args_to_insert->options[j]);
3292 }
3293 } else {
3294 options->push(args->options[i]);
3295 }
3296 }
3297 // make into options array
3298 jint result = set_args(options);
3299 delete options;
3300 return result;
3301 }
3302 };
3303
3304 jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) {
3305 return parse_options_environment_variable("_JAVA_OPTIONS", args);
3306 }
3307
3308 jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) {
3309 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args);
3310 }
3311
3312 jint Arguments::parse_options_environment_variable(const char* name,
3313 ScopedVMInitArgs* vm_args) {
3314 char *buffer = ::getenv(name);
3315
3316 // Don't check this environment variable if user has special privileges
3317 // (e.g. unix su command).
3318 if (buffer == NULL || os::have_special_privileges()) {
3319 return JNI_OK;
3320 }
3321
3322 if ((buffer = os::strdup(buffer)) == NULL) {
3323 return JNI_ENOMEM;
3324 }
3325
3326 jio_fprintf(defaultStream::error_stream(),
3327 "Picked up %s: %s\n", name, buffer);
3328
3329 int retcode = parse_options_buffer(name, buffer, strlen(buffer), vm_args);
3330
3331 os::free(buffer);
3332 return retcode;
3333 }
3334
3335 jint Arguments::parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args) {
3336 // read file into buffer
3337 int fd = ::open(file_name, O_RDONLY);
3338 if (fd < 0) {
3339 jio_fprintf(defaultStream::error_stream(),
3340 "Could not open options file '%s'\n",
3341 file_name);
3342 return JNI_ERR;
3343 }
3344
3345 struct stat stbuf;
3346 int retcode = os::stat(file_name, &stbuf);
3347 if (retcode != 0) {
3348 jio_fprintf(defaultStream::error_stream(),
3349 "Could not stat options file '%s'\n",
3350 file_name);
3351 os::close(fd);
3352 return JNI_ERR;
3353 }
3354
3355 if (stbuf.st_size == 0) {
3356 // tell caller there is no option data and that is ok
3357 os::close(fd);
3358 return JNI_OK;
3359 }
3360
3361 // '+ 1' for NULL termination even with max bytes
3362 size_t bytes_alloc = stbuf.st_size + 1;
3363
3364 char *buf = NEW_C_HEAP_ARRAY_RETURN_NULL(char, bytes_alloc, mtArguments);
3365 if (NULL == buf) {
3366 jio_fprintf(defaultStream::error_stream(),
3367 "Could not allocate read buffer for options file parse\n");
3368 os::close(fd);
3369 return JNI_ENOMEM;
3370 }
3371
3372 memset(buf, 0, bytes_alloc);
3373
3374 // Fill buffer
3375 // Use ::read() instead of os::read because os::read()
3376 // might do a thread state transition
3377 // and it is too early for that here
3378
3379 ssize_t bytes_read = ::read(fd, (void *)buf, (unsigned)bytes_alloc);
3380 os::close(fd);
3381 if (bytes_read < 0) {
3382 FREE_C_HEAP_ARRAY(char, buf);
3383 jio_fprintf(defaultStream::error_stream(),
3384 "Could not read options file '%s'\n", file_name);
3385 return JNI_ERR;
3386 }
3387
3388 if (bytes_read == 0) {
3389 // tell caller there is no option data and that is ok
3390 FREE_C_HEAP_ARRAY(char, buf);
3391 return JNI_OK;
3392 }
3393
3394 retcode = parse_options_buffer(file_name, buf, bytes_read, vm_args);
3395
3396 FREE_C_HEAP_ARRAY(char, buf);
3397 return retcode;
3398 }
3399
3400 jint Arguments::parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args) {
3401 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<JavaVMOption>(2, true); // Construct option array
3402
3403 // some pointers to help with parsing
3404 char *buffer_end = buffer + buf_len;
3405 char *opt_hd = buffer;
3406 char *wrt = buffer;
3407 char *rd = buffer;
3408
3409 // parse all options
3410 while (rd < buffer_end) {
3411 // skip leading white space from the input string
3412 while (rd < buffer_end && isspace(*rd)) {
3413 rd++;
3414 }
3415
3416 if (rd >= buffer_end) {
3417 break;
3418 }
3419
3420 // Remember this is where we found the head of the token.
3421 opt_hd = wrt;
3422
3423 // Tokens are strings of non white space characters separated
3424 // by one or more white spaces.
3425 while (rd < buffer_end && !isspace(*rd)) {
3426 if (*rd == '\'' || *rd == '"') { // handle a quoted string
3427 int quote = *rd; // matching quote to look for
3428 rd++; // don't copy open quote
3429 while (rd < buffer_end && *rd != quote) {
3430 // include everything (even spaces)
3431 // up until the close quote
3432 *wrt++ = *rd++; // copy to option string
3433 }
3434
3435 if (rd < buffer_end) {
3436 rd++; // don't copy close quote
3437 } else {
3438 // did not see closing quote
3439 jio_fprintf(defaultStream::error_stream(),
3440 "Unmatched quote in %s\n", name);
3441 delete options;
3442 return JNI_ERR;
3443 }
3444 } else {
3445 *wrt++ = *rd++; // copy to option string
3446 }
3447 }
3448
3449 // steal a white space character and set it to NULL
3450 *wrt++ = '\0';
3451 // We now have a complete token
3452
3453 JavaVMOption option;
3454 option.optionString = opt_hd;
3455 option.extraInfo = NULL;
3456
3457 options->append(option); // Fill in option
3458
3459 rd++; // Advance to next character
3460 }
3461
3462 // Fill out JavaVMInitArgs structure.
3463 jint status = vm_args->set_args(options);
3464
3465 delete options;
3466 return status;
3467 }
3468
3469 void Arguments::set_shared_spaces_flags() {
3470 if (DumpSharedSpaces) {
3471 if (FailOverToOldVerifier) {
3472 // Don't fall back to the old verifier on verification failure. If a
3473 // class fails verification with the split verifier, it might fail the
3474 // CDS runtime verifier constraint check. In that case, we don't want
3475 // to share the class. We only archive classes that pass the split verifier.
3476 FLAG_SET_DEFAULT(FailOverToOldVerifier, false);
3477 }
3478
3479 if (RequireSharedSpaces) {
3480 warning("Cannot dump shared archive while using shared archive");
3481 }
3482 UseSharedSpaces = false;
3483 #ifdef _LP64
3484 if (!UseCompressedOops || !UseCompressedClassPointers) {
3485 vm_exit_during_initialization(
3486 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL);
3487 }
3488 } else {
3489 if (!UseCompressedOops || !UseCompressedClassPointers) {
3490 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces.");
3491 }
3492 #endif
3493 }
3494 }
3495
3496 // Sharing support
3497 // Construct the path to the archive
3498 static char* get_shared_archive_path() {
3499 char *shared_archive_path;
3500 if (SharedArchiveFile == NULL) {
3501 char jvm_path[JVM_MAXPATHLEN];
3502 os::jvm_path(jvm_path, sizeof(jvm_path));
3503 char *end = strrchr(jvm_path, *os::file_separator());
3504 if (end != NULL) *end = '\0';
3505 size_t jvm_path_len = strlen(jvm_path);
3506 size_t file_sep_len = strlen(os::file_separator());
3507 const size_t len = jvm_path_len + file_sep_len + 20;
3508 shared_archive_path = NEW_C_HEAP_ARRAY(char, len, mtArguments);
3509 if (shared_archive_path != NULL) {
3510 jio_snprintf(shared_archive_path, len, "%s%sclasses.jsa",
3511 jvm_path, os::file_separator());
3512 }
3513 } else {
3514 shared_archive_path = os::strdup_check_oom(SharedArchiveFile, mtArguments);
3515 }
3516 return shared_archive_path;
3517 }
3518
3519 #ifndef PRODUCT
3520 // Determine whether LogVMOutput should be implicitly turned on.
3521 static bool use_vm_log() {
3522 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) ||
3523 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods ||
3524 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers ||
3525 PrintAssembly || TraceDeoptimization || TraceDependencies ||
3526 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) {
3527 return true;
3528 }
3529
3530 #ifdef COMPILER1
3531 if (PrintC1Statistics) {
3532 return true;
3533 }
3534 #endif // COMPILER1
3535
3536 #ifdef COMPILER2
3537 if (PrintOptoAssembly || PrintOptoStatistics) {
3538 return true;
3539 }
3540 #endif // COMPILER2
3541
3542 return false;
3543 }
3544
3545 #endif // PRODUCT
3546
3547 bool Arguments::args_contains_vm_options_file_arg(const JavaVMInitArgs* args) {
3548 for (int index = 0; index < args->nOptions; index++) {
3549 const JavaVMOption* option = args->options + index;
3550 const char* tail;
3551 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
3552 return true;
3553 }
3554 }
3555 return false;
3556 }
3557
3558 jint Arguments::insert_vm_options_file(const JavaVMInitArgs* args,
3559 const char* vm_options_file,
3560 const int vm_options_file_pos,
3561 ScopedVMInitArgs* vm_options_file_args,
3562 ScopedVMInitArgs* args_out) {
3563 jint code = parse_vm_options_file(vm_options_file, vm_options_file_args);
3564 if (code != JNI_OK) {
3565 return code;
3566 }
3567
3568 if (vm_options_file_args->get()->nOptions < 1) {
3569 return JNI_OK;
3570 }
3571
3572 if (args_contains_vm_options_file_arg(vm_options_file_args->get())) {
3573 jio_fprintf(defaultStream::error_stream(),
3574 "A VM options file may not refer to a VM options file. "
3575 "Specification of '-XX:VMOptionsFile=<file-name>' in the "
3576 "options file '%s' in options container '%s' is an error.\n",
3577 vm_options_file_args->vm_options_file_arg(),
3578 vm_options_file_args->container_name());
3579 return JNI_EINVAL;
3580 }
3581
3582 return args_out->insert(args, vm_options_file_args->get(),
3583 vm_options_file_pos);
3584 }
3585
3586 // Expand -XX:VMOptionsFile found in args_in as needed.
3587 // mod_args and args_out parameters may return values as needed.
3588 jint Arguments::expand_vm_options_as_needed(const JavaVMInitArgs* args_in,
3589 ScopedVMInitArgs* mod_args,
3590 JavaVMInitArgs** args_out) {
3591 jint code = match_special_option_and_act(args_in, mod_args);
3592 if (code != JNI_OK) {
3593 return code;
3594 }
3595
3596 if (mod_args->is_set()) {
3597 // args_in contains -XX:VMOptionsFile and mod_args contains the
3598 // original options from args_in along with the options expanded
3599 // from the VMOptionsFile. Return a short-hand to the caller.
3600 *args_out = mod_args->get();
3601 } else {
3602 *args_out = (JavaVMInitArgs *)args_in; // no changes so use args_in
3603 }
3604 return JNI_OK;
3605 }
3606
3607 jint Arguments::match_special_option_and_act(const JavaVMInitArgs* args,
3608 ScopedVMInitArgs* args_out) {
3609 // Remaining part of option string
3610 const char* tail;
3611 ScopedVMInitArgs vm_options_file_args(args_out->container_name());
3612
3613 for (int index = 0; index < args->nOptions; index++) {
3614 const JavaVMOption* option = args->options + index;
3615 if (ArgumentsExt::process_options(option)) {
3616 continue;
3617 }
3618 if (match_option(option, "-XX:Flags=", &tail)) {
3619 Arguments::set_jvm_flags_file(tail);
3620 continue;
3621 }
3622 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
3623 if (vm_options_file_args.found_vm_options_file_arg()) {
3624 jio_fprintf(defaultStream::error_stream(),
3625 "The option '%s' is already specified in the options "
3626 "container '%s' so the specification of '%s' in the "
3627 "same options container is an error.\n",
3628 vm_options_file_args.vm_options_file_arg(),
3629 vm_options_file_args.container_name(),
3630 option->optionString);
3631 return JNI_EINVAL;
3632 }
3633 vm_options_file_args.set_vm_options_file_arg(option->optionString);
3634 // If there's a VMOptionsFile, parse that
3635 jint code = insert_vm_options_file(args, tail, index,
3636 &vm_options_file_args, args_out);
3637 if (code != JNI_OK) {
3638 return code;
3639 }
3640 args_out->set_vm_options_file_arg(vm_options_file_args.vm_options_file_arg());
3641 if (args_out->is_set()) {
3642 // The VMOptions file inserted some options so switch 'args'
3643 // to the new set of options, and continue processing which
3644 // preserves "last option wins" semantics.
3645 args = args_out->get();
3646 // The first option from the VMOptionsFile replaces the
3647 // current option. So we back track to process the
3648 // replacement option.
3649 index--;
3650 }
3651 continue;
3652 }
3653 if (match_option(option, "-XX:+PrintVMOptions")) {
3654 PrintVMOptions = true;
3655 continue;
3656 }
3657 if (match_option(option, "-XX:-PrintVMOptions")) {
3658 PrintVMOptions = false;
3659 continue;
3660 }
3661 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) {
3662 IgnoreUnrecognizedVMOptions = true;
3663 continue;
3664 }
3665 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) {
3666 IgnoreUnrecognizedVMOptions = false;
3667 continue;
3668 }
3669 if (match_option(option, "-XX:+PrintFlagsInitial")) {
3670 JVMFlag::printFlags(tty, false);
3671 vm_exit(0);
3672 }
3673 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) {
3674 #if INCLUDE_NMT
3675 // The launcher did not setup nmt environment variable properly.
3676 if (!MemTracker::check_launcher_nmt_support(tail)) {
3677 warning("Native Memory Tracking did not setup properly, using wrong launcher?");
3678 }
3679
3680 // Verify if nmt option is valid.
3681 if (MemTracker::verify_nmt_option()) {
3682 // Late initialization, still in single-threaded mode.
3683 if (MemTracker::tracking_level() >= NMT_summary) {
3684 MemTracker::init();
3685 }
3686 } else {
3687 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL);
3688 }
3689 continue;
3690 #else
3691 jio_fprintf(defaultStream::error_stream(),
3692 "Native Memory Tracking is not supported in this VM\n");
3693 return JNI_ERR;
3694 #endif
3695 }
3696
3697 #ifndef PRODUCT
3698 if (match_option(option, "-XX:+PrintFlagsWithComments")) {
3699 JVMFlag::printFlags(tty, true);
3700 vm_exit(0);
3701 }
3702 #endif
3703 }
3704 return JNI_OK;
3705 }
3706
3707 static void print_options(const JavaVMInitArgs *args) {
3708 const char* tail;
3709 for (int index = 0; index < args->nOptions; index++) {
3710 const JavaVMOption *option = args->options + index;
3711 if (match_option(option, "-XX:", &tail)) {
3712 logOption(tail);
3713 }
3714 }
3715 }
3716
3717 bool Arguments::handle_deprecated_print_gc_flags() {
3718 if (PrintGC) {
3719 log_warning(gc)("-XX:+PrintGC is deprecated. Will use -Xlog:gc instead.");
3720 }
3721 if (PrintGCDetails) {
3722 log_warning(gc)("-XX:+PrintGCDetails is deprecated. Will use -Xlog:gc* instead.");
3723 }
3724
3725 if (_gc_log_filename != NULL) {
3726 // -Xloggc was used to specify a filename
3727 const char* gc_conf = PrintGCDetails ? "gc*" : "gc";
3728
3729 LogTarget(Error, logging) target;
3730 LogStream errstream(target);
3731 return LogConfiguration::parse_log_arguments(_gc_log_filename, gc_conf, NULL, NULL, &errstream);
3732 } else if (PrintGC || PrintGCDetails) {
3733 LogConfiguration::configure_stdout(LogLevel::Info, !PrintGCDetails, LOG_TAGS(gc));
3734 }
3735 return true;
3736 }
3737
3738 void Arguments::handle_extra_cms_flags(const char* msg) {
3739 SpecialFlag flag;
3740 const char *flag_name = "UseConcMarkSweepGC";
3741 if (lookup_special_flag(flag_name, flag)) {
3742 handle_aliases_and_deprecation(flag_name, /* print warning */ true);
3743 warning("%s", msg);
3744 }
3745 }
3746
3747 // Parse entry point called from JNI_CreateJavaVM
3748
3749 jint Arguments::parse(const JavaVMInitArgs* initial_cmd_args) {
3750 assert(verify_special_jvm_flags(), "deprecated and obsolete flag table inconsistent");
3751
3752 // Initialize ranges, constraints and writeables
3753 JVMFlagRangeList::init();
3754 JVMFlagConstraintList::init();
3755 JVMFlagWriteableList::init();
3756
3757 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed.
3758 const char* hotspotrc = ".hotspotrc";
3759 bool settings_file_specified = false;
3760 bool needs_hotspotrc_warning = false;
3761 ScopedVMInitArgs initial_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
3762 ScopedVMInitArgs initial_java_options_args("env_var='_JAVA_OPTIONS'");
3763
3764 // Pointers to current working set of containers
3765 JavaVMInitArgs* cur_cmd_args;
3766 JavaVMInitArgs* cur_java_options_args;
3767 JavaVMInitArgs* cur_java_tool_options_args;
3768
3769 // Containers for modified/expanded options
3770 ScopedVMInitArgs mod_cmd_args("cmd_line_args");
3771 ScopedVMInitArgs mod_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
3772 ScopedVMInitArgs mod_java_options_args("env_var='_JAVA_OPTIONS'");
3773
3774
3775 jint code =
3776 parse_java_tool_options_environment_variable(&initial_java_tool_options_args);
3777 if (code != JNI_OK) {
3778 return code;
3779 }
3780
3781 code = parse_java_options_environment_variable(&initial_java_options_args);
3782 if (code != JNI_OK) {
3783 return code;
3784 }
3785
3786 code = expand_vm_options_as_needed(initial_java_tool_options_args.get(),
3787 &mod_java_tool_options_args,
3788 &cur_java_tool_options_args);
3789 if (code != JNI_OK) {
3790 return code;
3791 }
3792
3793 code = expand_vm_options_as_needed(initial_cmd_args,
3794 &mod_cmd_args,
3795 &cur_cmd_args);
3796 if (code != JNI_OK) {
3797 return code;
3798 }
3799
3800 code = expand_vm_options_as_needed(initial_java_options_args.get(),
3801 &mod_java_options_args,
3802 &cur_java_options_args);
3803 if (code != JNI_OK) {
3804 return code;
3805 }
3806
3807 const char* flags_file = Arguments::get_jvm_flags_file();
3808 settings_file_specified = (flags_file != NULL);
3809
3810 if (IgnoreUnrecognizedVMOptions) {
3811 cur_cmd_args->ignoreUnrecognized = true;
3812 cur_java_tool_options_args->ignoreUnrecognized = true;
3813 cur_java_options_args->ignoreUnrecognized = true;
3814 }
3815
3816 // Parse specified settings file
3817 if (settings_file_specified) {
3818 if (!process_settings_file(flags_file, true,
3819 cur_cmd_args->ignoreUnrecognized)) {
3820 return JNI_EINVAL;
3821 }
3822 } else {
3823 #ifdef ASSERT
3824 // Parse default .hotspotrc settings file
3825 if (!process_settings_file(".hotspotrc", false,
3826 cur_cmd_args->ignoreUnrecognized)) {
3827 return JNI_EINVAL;
3828 }
3829 #else
3830 struct stat buf;
3831 if (os::stat(hotspotrc, &buf) == 0) {
3832 needs_hotspotrc_warning = true;
3833 }
3834 #endif
3835 }
3836
3837 if (PrintVMOptions) {
3838 print_options(cur_java_tool_options_args);
3839 print_options(cur_cmd_args);
3840 print_options(cur_java_options_args);
3841 }
3842
3843 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS
3844 jint result = parse_vm_init_args(cur_java_tool_options_args,
3845 cur_java_options_args,
3846 cur_cmd_args);
3847
3848 if (result != JNI_OK) {
3849 return result;
3850 }
3851
3852 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed.
3853 SharedArchivePath = get_shared_archive_path();
3854 if (SharedArchivePath == NULL) {
3855 return JNI_ENOMEM;
3856 }
3857
3858 // Set up VerifySharedSpaces
3859 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) {
3860 VerifySharedSpaces = true;
3861 }
3862
3863 // Delay warning until here so that we've had a chance to process
3864 // the -XX:-PrintWarnings flag
3865 if (needs_hotspotrc_warning) {
3866 warning("%s file is present but has been ignored. "
3867 "Run with -XX:Flags=%s to load the file.",
3868 hotspotrc, hotspotrc);
3869 }
3870
3871 if (needs_module_property_warning) {
3872 warning("Ignoring system property options whose names match the '-Djdk.module.*'."
3873 " names that are reserved for internal use.");
3874 }
3875
3876 #if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
3877 UNSUPPORTED_OPTION(UseLargePages);
3878 #endif
3879
3880 ArgumentsExt::report_unsupported_options();
3881
3882 #ifndef PRODUCT
3883 if (TraceBytecodesAt != 0) {
3884 TraceBytecodes = true;
3885 }
3886 if (CountCompiledCalls) {
3887 if (UseCounterDecay) {
3888 warning("UseCounterDecay disabled because CountCalls is set");
3889 UseCounterDecay = false;
3890 }
3891 }
3892 #endif // PRODUCT
3893
3894 if (ScavengeRootsInCode == 0) {
3895 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) {
3896 warning("Forcing ScavengeRootsInCode non-zero");
3897 }
3898 ScavengeRootsInCode = 1;
3899 }
3900
3901 if (!handle_deprecated_print_gc_flags()) {
3902 return JNI_EINVAL;
3903 }
3904
3905 // Set object alignment values.
3906 set_object_alignment();
3907
3908 #if !INCLUDE_CDS
3909 if (DumpSharedSpaces || RequireSharedSpaces) {
3910 jio_fprintf(defaultStream::error_stream(),
3911 "Shared spaces are not supported in this VM\n");
3912 return JNI_ERR;
3913 }
3914 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) ||
3915 log_is_enabled(Info, cds)) {
3916 warning("Shared spaces are not supported in this VM");
3917 FLAG_SET_DEFAULT(UseSharedSpaces, false);
3918 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(cds));
3919 }
3920 no_shared_spaces("CDS Disabled");
3921 #endif // INCLUDE_CDS
3922
3923 return JNI_OK;
3924 }
3925
3926 jint Arguments::apply_ergo() {
3927 // Set flags based on ergonomics.
3928 jint result = set_ergonomics_flags();
3929 if (result != JNI_OK) return result;
3930
3931 // Set heap size based on available physical memory
3932 set_heap_size();
3933
3934 GCConfig::arguments()->initialize();
3935
3936 set_shared_spaces_flags();
3937
3938 // Initialize Metaspace flags and alignments
3939 Metaspace::ergo_initialize();
3940
3941 // Set compiler flags after GC is selected and GC specific
3942 // flags (LoopStripMiningIter) are set.
3943 CompilerConfig::ergo_initialize();
3944
3945 // Set bytecode rewriting flags
3946 set_bytecode_flags();
3947
3948 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled
3949 jint code = set_aggressive_opts_flags();
3950 if (code != JNI_OK) {
3951 return code;
3952 }
3953
3954 // Turn off biased locking for locking debug mode flags,
3955 // which are subtly different from each other but neither works with
3956 // biased locking
3957 if (UseHeavyMonitors
3958 #ifdef COMPILER1
3959 || !UseFastLocking
3960 #endif // COMPILER1
3961 #if INCLUDE_JVMCI
3962 || !JVMCIUseFastLocking
3963 #endif
3964 ) {
3965 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) {
3966 // flag set to true on command line; warn the user that they
3967 // can't enable biased locking here
3968 warning("Biased Locking is not supported with locking debug flags"
3969 "; ignoring UseBiasedLocking flag." );
3970 }
3971 UseBiasedLocking = false;
3972 }
3973
3974 #ifdef CC_INTERP
3975 // Clear flags not supported on zero.
3976 FLAG_SET_DEFAULT(ProfileInterpreter, false);
3977 FLAG_SET_DEFAULT(UseBiasedLocking, false);
3978 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false));
3979 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false));
3980 #endif // CC_INTERP
3981
3982 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) {
3983 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output");
3984 DebugNonSafepoints = true;
3985 }
3986
3987 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) {
3988 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used");
3989 }
3990
3991 if (!EnableValhalla || is_interpreter_only()) {
3992 // Disable calling convention optimizations if value types are not supported
3993 ValueTypePassFieldsAsArgs = false;
3994 ValueTypeReturnedAsFields = false;
3995 }
3996
3997 #ifndef PRODUCT
3998 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) {
3999 if (use_vm_log()) {
4000 LogVMOutput = true;
4001 }
4002 }
4003 #endif // PRODUCT
4004
4005 if (PrintCommandLineFlags) {
4006 JVMFlag::printSetFlags(tty);
4007 }
4008
4009 // Apply CPU specific policy for the BiasedLocking
4010 if (UseBiasedLocking) {
4011 if (!VM_Version::use_biased_locking() &&
4012 !(FLAG_IS_CMDLINE(UseBiasedLocking))) {
4013 UseBiasedLocking = false;
4014 }
4015 }
4016 #ifdef COMPILER2
4017 if (!UseBiasedLocking || EmitSync != 0) {
4018 UseOptoBiasInlining = false;
4019 }
4020 #endif
4021
4022 #if defined(IA32)
4023 // Only server compiler can optimize safepoints well enough.
4024 if (!is_server_compilation_mode_vm()) {
4025 FLAG_SET_ERGO_IF_DEFAULT(bool, ThreadLocalHandshakes, false);
4026 }
4027 #endif
4028
4029 // ThreadLocalHandshakesConstraintFunc handles the constraints.
4030 if (FLAG_IS_DEFAULT(ThreadLocalHandshakes) || !SafepointMechanism::supports_thread_local_poll()) {
4031 log_debug(ergo)("ThreadLocalHandshakes %s", ThreadLocalHandshakes ? "enabled." : "disabled.");
4032 } else {
4033 log_info(ergo)("ThreadLocalHandshakes %s", ThreadLocalHandshakes ? "enabled." : "disabled.");
4034 }
4035
4036 return JNI_OK;
4037 }
4038
4039 jint Arguments::adjust_after_os() {
4040 if (UseNUMA) {
4041 if (!FLAG_IS_DEFAULT(AllocateHeapAt)) {
4042 FLAG_SET_ERGO(bool, UseNUMA, false);
4043 } else if (UseParallelGC || UseParallelOldGC) {
4044 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) {
4045 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M);
4046 }
4047 }
4048 // UseNUMAInterleaving is set to ON for all collectors and
4049 // platforms when UseNUMA is set to ON. NUMA-aware collectors
4050 // such as the parallel collector for Linux and Solaris will
4051 // interleave old gen and survivor spaces on top of NUMA
4052 // allocation policy for the eden space.
4053 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on
4054 // all platforms and ParallelGC on Windows will interleave all
4055 // of the heap spaces across NUMA nodes.
4056 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) {
4057 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true);
4058 }
4059 }
4060 return JNI_OK;
4061 }
4062
4063 int Arguments::PropertyList_count(SystemProperty* pl) {
4064 int count = 0;
4065 while(pl != NULL) {
4066 count++;
4067 pl = pl->next();
4068 }
4069 return count;
4070 }
4071
4072 // Return the number of readable properties.
4073 int Arguments::PropertyList_readable_count(SystemProperty* pl) {
4074 int count = 0;
4075 while(pl != NULL) {
4076 if (pl->is_readable()) {
4077 count++;
4078 }
4079 pl = pl->next();
4080 }
4081 return count;
4082 }
4083
4084 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) {
4085 assert(key != NULL, "just checking");
4086 SystemProperty* prop;
4087 for (prop = pl; prop != NULL; prop = prop->next()) {
4088 if (strcmp(key, prop->key()) == 0) return prop->value();
4089 }
4090 return NULL;
4091 }
4092
4093 // Return the value of the requested property provided that it is a readable property.
4094 const char* Arguments::PropertyList_get_readable_value(SystemProperty *pl, const char* key) {
4095 assert(key != NULL, "just checking");
4096 SystemProperty* prop;
4097 // Return the property value if the keys match and the property is not internal or
4098 // it's the special internal property "jdk.boot.class.path.append".
4099 for (prop = pl; prop != NULL; prop = prop->next()) {
4100 if (strcmp(key, prop->key()) == 0) {
4101 if (!prop->internal()) {
4102 return prop->value();
4103 } else if (strcmp(key, "jdk.boot.class.path.append") == 0) {
4104 return prop->value();
4105 } else {
4106 // Property is internal and not jdk.boot.class.path.append so return NULL.
4107 return NULL;
4108 }
4109 }
4110 }
4111 return NULL;
4112 }
4113
4114 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) {
4115 int count = 0;
4116 const char* ret_val = NULL;
4117
4118 while(pl != NULL) {
4119 if(count >= index) {
4120 ret_val = pl->key();
4121 break;
4122 }
4123 count++;
4124 pl = pl->next();
4125 }
4126
4127 return ret_val;
4128 }
4129
4130 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) {
4131 int count = 0;
4132 char* ret_val = NULL;
4133
4134 while(pl != NULL) {
4135 if(count >= index) {
4136 ret_val = pl->value();
4137 break;
4138 }
4139 count++;
4140 pl = pl->next();
4141 }
4142
4143 return ret_val;
4144 }
4145
4146 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) {
4147 SystemProperty* p = *plist;
4148 if (p == NULL) {
4149 *plist = new_p;
4150 } else {
4151 while (p->next() != NULL) {
4152 p = p->next();
4153 }
4154 p->set_next(new_p);
4155 }
4156 }
4157
4158 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v,
4159 bool writeable, bool internal) {
4160 if (plist == NULL)
4161 return;
4162
4163 SystemProperty* new_p = new SystemProperty(k, v, writeable, internal);
4164 PropertyList_add(plist, new_p);
4165 }
4166
4167 void Arguments::PropertyList_add(SystemProperty *element) {
4168 PropertyList_add(&_system_properties, element);
4169 }
4170
4171 // This add maintains unique property key in the list.
4172 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v,
4173 PropertyAppendable append, PropertyWriteable writeable,
4174 PropertyInternal internal) {
4175 if (plist == NULL)
4176 return;
4177
4178 // If property key exist then update with new value.
4179 SystemProperty* prop;
4180 for (prop = *plist; prop != NULL; prop = prop->next()) {
4181 if (strcmp(k, prop->key()) == 0) {
4182 if (append == AppendProperty) {
4183 prop->append_value(v);
4184 } else {
4185 prop->set_value(v);
4186 }
4187 return;
4188 }
4189 }
4190
4191 PropertyList_add(plist, k, v, writeable == WriteableProperty, internal == InternalProperty);
4192 }
4193
4194 // Copies src into buf, replacing "%%" with "%" and "%p" with pid
4195 // Returns true if all of the source pointed by src has been copied over to
4196 // the destination buffer pointed by buf. Otherwise, returns false.
4197 // Notes:
4198 // 1. If the length (buflen) of the destination buffer excluding the
4199 // NULL terminator character is not long enough for holding the expanded
4200 // pid characters, it also returns false instead of returning the partially
4201 // expanded one.
4202 // 2. The passed in "buflen" should be large enough to hold the null terminator.
4203 bool Arguments::copy_expand_pid(const char* src, size_t srclen,
4204 char* buf, size_t buflen) {
4205 const char* p = src;
4206 char* b = buf;
4207 const char* src_end = &src[srclen];
4208 char* buf_end = &buf[buflen - 1];
4209
4210 while (p < src_end && b < buf_end) {
4211 if (*p == '%') {
4212 switch (*(++p)) {
4213 case '%': // "%%" ==> "%"
4214 *b++ = *p++;
4215 break;
4216 case 'p': { // "%p" ==> current process id
4217 // buf_end points to the character before the last character so
4218 // that we could write '\0' to the end of the buffer.
4219 size_t buf_sz = buf_end - b + 1;
4220 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id());
4221
4222 // if jio_snprintf fails or the buffer is not long enough to hold
4223 // the expanded pid, returns false.
4224 if (ret < 0 || ret >= (int)buf_sz) {
4225 return false;
4226 } else {
4227 b += ret;
4228 assert(*b == '\0', "fail in copy_expand_pid");
4229 if (p == src_end && b == buf_end + 1) {
4230 // reach the end of the buffer.
4231 return true;
4232 }
4233 }
4234 p++;
4235 break;
4236 }
4237 default :
4238 *b++ = '%';
4239 }
4240 } else {
4241 *b++ = *p++;
4242 }
4243 }
4244 *b = '\0';
4245 return (p == src_end); // return false if not all of the source was copied
4246 }