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