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
120 GrowableArray<ModulePatchPath*> *Arguments::_patch_mod_prefix = NULL;
121 PathString *Arguments::_system_boot_class_path = NULL;
122 bool Arguments::_has_jimage = false;
123
124 char* Arguments::_ext_dirs = NULL;
125
126 bool PathString::set_value(const char *value) {
127 if (_value != NULL) {
128 FreeHeap(_value);
129 }
130 _value = AllocateHeap(strlen(value)+1, mtArguments);
131 assert(_value != NULL, "Unable to allocate space for new path value");
132 if (_value != NULL) {
133 strcpy(_value, value);
134 } else {
135 // not able to allocate
136 return false;
137 }
138 return true;
139 }
140
141 void PathString::append_value(const char *value) {
142 char *sp;
143 size_t len = 0;
144 if (value != NULL) {
145 len = strlen(value);
146 if (_value != NULL) {
147 len += strlen(_value);
148 }
149 sp = AllocateHeap(len+2, mtArguments);
150 assert(sp != NULL, "Unable to allocate space for new append path value");
151 if (sp != NULL) {
152 if (_value != NULL) {
153 strcpy(sp, _value);
154 strcat(sp, os::path_separator());
155 strcat(sp, value);
156 FreeHeap(_value);
157 } else {
158 strcpy(sp, value);
159 }
160 _value = sp;
161 }
162 }
163 }
164
165 PathString::PathString(const char* value) {
166 if (value == NULL) {
167 _value = NULL;
168 } else {
169 _value = AllocateHeap(strlen(value)+1, mtArguments);
170 strcpy(_value, value);
171 }
172 }
173
174 PathString::~PathString() {
175 if (_value != NULL) {
176 FreeHeap(_value);
177 _value = NULL;
178 }
179 }
180
181 ModulePatchPath::ModulePatchPath(const char* module_name, const char* path) {
182 assert(module_name != NULL && path != NULL, "Invalid module name or path value");
183 size_t len = strlen(module_name) + 1;
184 _module_name = AllocateHeap(len, mtInternal);
185 strncpy(_module_name, module_name, len); // copy the trailing null
186 _path = new PathString(path);
187 }
188
189 ModulePatchPath::~ModulePatchPath() {
190 if (_module_name != NULL) {
191 FreeHeap(_module_name);
192 _module_name = NULL;
193 }
194 if (_path != NULL) {
195 delete _path;
196 _path = NULL;
197 }
198 }
199
200 SystemProperty::SystemProperty(const char* key, const char* value, bool writeable, bool internal) : PathString(value) {
201 if (key == NULL) {
202 _key = NULL;
203 } else {
204 _key = AllocateHeap(strlen(key)+1, mtArguments);
205 strcpy(_key, key);
206 }
207 _next = NULL;
208 _internal = internal;
209 _writeable = writeable;
210 }
211
212 AgentLibrary::AgentLibrary(const char* name, const char* options,
213 bool is_absolute_path, void* os_lib,
214 bool instrument_lib) {
215 _name = AllocateHeap(strlen(name)+1, mtArguments);
216 strcpy(_name, name);
217 if (options == NULL) {
218 _options = NULL;
219 } else {
220 _options = AllocateHeap(strlen(options)+1, mtArguments);
221 strcpy(_options, options);
222 }
223 _is_absolute_path = is_absolute_path;
224 _os_lib = os_lib;
225 _next = NULL;
226 _state = agent_invalid;
227 _is_static_lib = false;
228 _is_instrument_lib = instrument_lib;
229 }
230
231 // Check if head of 'option' matches 'name', and sets 'tail' to the remaining
232 // part of the option string.
233 static bool match_option(const JavaVMOption *option, const char* name,
234 const char** tail) {
235 size_t len = strlen(name);
236 if (strncmp(option->optionString, name, len) == 0) {
237 *tail = option->optionString + len;
238 return true;
239 } else {
240 return false;
241 }
242 }
243
244 // Check if 'option' matches 'name'. No "tail" is allowed.
245 static bool match_option(const JavaVMOption *option, const char* name) {
246 const char* tail = NULL;
247 bool result = match_option(option, name, &tail);
248 if (tail != NULL && *tail == '\0') {
249 return result;
250 } else {
251 return false;
252 }
253 }
254
255 // Return true if any of the strings in null-terminated array 'names' matches.
256 // If tail_allowed is true, then the tail must begin with a colon; otherwise,
257 // the option must match exactly.
258 static bool match_option(const JavaVMOption* option, const char** names, const char** tail,
259 bool tail_allowed) {
260 for (/* empty */; *names != NULL; ++names) {
261 if (match_option(option, *names, tail)) {
262 if (**tail == '\0' || (tail_allowed && **tail == ':')) {
263 return true;
264 }
265 }
266 }
267 return false;
268 }
269
270 #if INCLUDE_JFR
271 // return true on failure
272 static bool match_jfr_option(const JavaVMOption** option) {
273 assert((*option)->optionString != NULL, "invariant");
274 char* tail = NULL;
275 if (match_option(*option, "-XX:StartFlightRecording", (const char**)&tail)) {
276 return Jfr::on_start_flight_recording_option(option, tail);
277 } else if (match_option(*option, "-XX:FlightRecorderOptions", (const char**)&tail)) {
278 return Jfr::on_flight_recorder_option(option, tail);
279 }
280 return false;
281 }
282 #endif
283
284 static void logOption(const char* opt) {
285 if (PrintVMOptions) {
286 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt);
287 }
288 }
289
290 bool needs_module_property_warning = false;
291
292 #define MODULE_PROPERTY_PREFIX "jdk.module."
293 #define MODULE_PROPERTY_PREFIX_LEN 11
294 #define ADDEXPORTS "addexports"
295 #define ADDEXPORTS_LEN 10
296 #define ADDREADS "addreads"
297 #define ADDREADS_LEN 8
298 #define ADDOPENS "addopens"
299 #define ADDOPENS_LEN 8
300 #define PATCH "patch"
301 #define PATCH_LEN 5
302 #define ADDMODS "addmods"
303 #define ADDMODS_LEN 7
304 #define LIMITMODS "limitmods"
305 #define LIMITMODS_LEN 9
306 #define PATH "path"
307 #define PATH_LEN 4
308 #define UPGRADE_PATH "upgrade.path"
309 #define UPGRADE_PATH_LEN 12
310
311 void Arguments::add_init_library(const char* name, char* options) {
312 _libraryList.add(new AgentLibrary(name, options, false, NULL));
313 }
314
315 void Arguments::add_init_agent(const char* name, char* options, bool absolute_path) {
316 _agentList.add(new AgentLibrary(name, options, absolute_path, NULL));
317 }
318
319 void Arguments::add_instrument_agent(const char* name, char* options, bool absolute_path) {
320 _agentList.add(new AgentLibrary(name, options, absolute_path, NULL, true));
321 }
322
323 // Late-binding agents not started via arguments
324 void Arguments::add_loaded_agent(AgentLibrary *agentLib) {
325 _agentList.add(agentLib);
326 }
327
328 void Arguments::add_loaded_agent(const char* name, char* options, bool absolute_path, void* os_lib) {
329 _agentList.add(new AgentLibrary(name, options, absolute_path, os_lib));
330 }
331
332 // Return TRUE if option matches 'property', or 'property=', or 'property.'.
333 static bool matches_property_suffix(const char* option, const char* property, size_t len) {
334 return ((strncmp(option, property, len) == 0) &&
335 (option[len] == '=' || option[len] == '.' || option[len] == '\0'));
336 }
337
338 // Return true if property starts with "jdk.module." and its ensuing chars match
339 // any of the reserved module properties.
340 // property should be passed without the leading "-D".
341 bool Arguments::is_internal_module_property(const char* property) {
342 assert((strncmp(property, "-D", 2) != 0), "Unexpected leading -D");
343 if (strncmp(property, MODULE_PROPERTY_PREFIX, MODULE_PROPERTY_PREFIX_LEN) == 0) {
344 const char* property_suffix = property + MODULE_PROPERTY_PREFIX_LEN;
345 if (matches_property_suffix(property_suffix, ADDEXPORTS, ADDEXPORTS_LEN) ||
346 matches_property_suffix(property_suffix, ADDREADS, ADDREADS_LEN) ||
347 matches_property_suffix(property_suffix, ADDOPENS, ADDOPENS_LEN) ||
348 matches_property_suffix(property_suffix, PATCH, PATCH_LEN) ||
349 matches_property_suffix(property_suffix, ADDMODS, ADDMODS_LEN) ||
350 matches_property_suffix(property_suffix, LIMITMODS, LIMITMODS_LEN) ||
351 matches_property_suffix(property_suffix, PATH, PATH_LEN) ||
352 matches_property_suffix(property_suffix, UPGRADE_PATH, UPGRADE_PATH_LEN)) {
353 return true;
354 }
355 }
356 return false;
357 }
358
359 // Process java launcher properties.
360 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) {
361 // See if sun.java.launcher, sun.java.launcher.is_altjvm or
362 // sun.java.launcher.pid is defined.
363 // Must do this before setting up other system properties,
364 // as some of them may depend on launcher type.
365 for (int index = 0; index < args->nOptions; index++) {
366 const JavaVMOption* option = args->options + index;
367 const char* tail;
368
369 if (match_option(option, "-Dsun.java.launcher=", &tail)) {
370 process_java_launcher_argument(tail, option->extraInfo);
371 continue;
372 }
373 if (match_option(option, "-Dsun.java.launcher.is_altjvm=", &tail)) {
374 if (strcmp(tail, "true") == 0) {
375 _sun_java_launcher_is_altjvm = true;
376 }
377 continue;
378 }
379 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) {
380 _sun_java_launcher_pid = atoi(tail);
381 continue;
382 }
383 }
384 }
385
386 // Initialize system properties key and value.
387 void Arguments::init_system_properties() {
388
389 // Set up _system_boot_class_path which is not a property but
390 // relies heavily on argument processing and the jdk.boot.class.path.append
391 // property. It is used to store the underlying system boot class path.
392 _system_boot_class_path = new PathString(NULL);
393
394 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name",
395 "Java Virtual Machine Specification", false));
396 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false));
397 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false));
398 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true));
399 PropertyList_add(&_system_properties, new SystemProperty("jdk.debug", VM_Version::jdk_debug_level(), false));
400
401 // Following are JVMTI agent writable properties.
402 // Properties values are set to NULL and they are
403 // os specific they are initialized in os::init_system_properties_values().
404 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true);
405 _java_library_path = new SystemProperty("java.library.path", NULL, true);
406 _java_home = new SystemProperty("java.home", NULL, true);
407 _java_class_path = new SystemProperty("java.class.path", "", true);
408 // jdk.boot.class.path.append is a non-writeable, internal property.
409 // It can only be set by either:
410 // - -Xbootclasspath/a:
411 // - AddToBootstrapClassLoaderSearch during JVMTI OnLoad phase
412 _jdk_boot_class_path_append = new SystemProperty("jdk.boot.class.path.append", "", false, true);
413
414 // Add to System Property list.
415 PropertyList_add(&_system_properties, _sun_boot_library_path);
416 PropertyList_add(&_system_properties, _java_library_path);
417 PropertyList_add(&_system_properties, _java_home);
418 PropertyList_add(&_system_properties, _java_class_path);
419 PropertyList_add(&_system_properties, _jdk_boot_class_path_append);
420
421 // Set OS specific system properties values
422 os::init_system_properties_values();
423 }
424
425 // Update/Initialize System properties after JDK version number is known
426 void Arguments::init_version_specific_system_properties() {
427 enum { bufsz = 16 };
428 char buffer[bufsz];
429 const char* spec_vendor = "Oracle Corporation";
430 uint32_t spec_version = JDK_Version::current().major_version();
431
432 jio_snprintf(buffer, bufsz, UINT32_FORMAT, spec_version);
433
434 PropertyList_add(&_system_properties,
435 new SystemProperty("java.vm.specification.vendor", spec_vendor, false));
436 PropertyList_add(&_system_properties,
437 new SystemProperty("java.vm.specification.version", buffer, false));
438 PropertyList_add(&_system_properties,
439 new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false));
440 }
441
442 /*
443 * -XX argument processing:
444 *
445 * -XX arguments are defined in several places, such as:
446 * globals.hpp, globals_<cpu>.hpp, globals_<os>.hpp, <compiler>_globals.hpp, or <gc>_globals.hpp.
447 * -XX arguments are parsed in parse_argument().
448 * -XX argument bounds checking is done in check_vm_args_consistency().
449 *
450 * Over time -XX arguments may change. There are mechanisms to handle common cases:
451 *
452 * ALIASED: An option that is simply another name for another option. This is often
453 * part of the process of deprecating a flag, but not all aliases need
454 * to be deprecated.
455 *
456 * Create an alias for an option by adding the old and new option names to the
457 * "aliased_jvm_flags" table. Delete the old variable from globals.hpp (etc).
458 *
459 * DEPRECATED: An option that is supported, but a warning is printed to let the user know that
460 * support may be removed in the future. Both regular and aliased options may be
461 * deprecated.
462 *
463 * Add a deprecation warning for an option (or alias) by adding an entry in the
464 * "special_jvm_flags" table and setting the "deprecated_in" field.
465 * Often an option "deprecated" in one major release will
466 * be made "obsolete" in the next. In this case the entry should also have its
467 * "obsolete_in" field set.
468 *
469 * OBSOLETE: An option that has been removed (and deleted from globals.hpp), but is still accepted
470 * on the command line. A warning is printed to let the user know that option might not
471 * be accepted in the future.
472 *
473 * Add an obsolete warning for an option by adding an entry in the "special_jvm_flags"
474 * table and setting the "obsolete_in" field.
475 *
476 * EXPIRED: A deprecated or obsolete option that has an "accept_until" version less than or equal
477 * to the current JDK version. The system will flatly refuse to admit the existence of
478 * the flag. This allows a flag to die automatically over JDK releases.
479 *
480 * Note that manual cleanup of expired options should be done at major JDK version upgrades:
481 * - Newly expired options should be removed from the special_jvm_flags and aliased_jvm_flags tables.
482 * - Newly obsolete or expired deprecated options should have their global variable
483 * definitions removed (from globals.hpp, etc) and related implementations removed.
484 *
485 * Recommended approach for removing options:
486 *
487 * To remove options commonly used by customers (e.g. product, commercial -XX options), use
488 * the 3-step model adding major release numbers to the deprecate, obsolete and expire columns.
489 *
490 * To remove internal options (e.g. diagnostic, experimental, develop options), use
491 * a 2-step model adding major release numbers to the obsolete and expire columns.
492 *
493 * To change the name of an option, use the alias table as well as a 2-step
494 * model adding major release numbers to the deprecate and expire columns.
495 * Think twice about aliasing commonly used customer options.
496 *
497 * There are times when it is appropriate to leave a future release number as undefined.
498 *
499 * Tests: Aliases should be tested in VMAliasOptions.java.
500 * Deprecated options should be tested in VMDeprecatedOptions.java.
501 */
502
503 // The special_jvm_flags table declares options that are being deprecated and/or obsoleted. The
504 // "deprecated_in" or "obsolete_in" fields may be set to "undefined", but not both.
505 // When the JDK version reaches 'deprecated_in' limit, the JVM will process this flag on
506 // the command-line as usual, but will issue a warning.
507 // When the JDK version reaches 'obsolete_in' limit, the JVM will continue accepting this flag on
508 // the command-line, while issuing a warning and ignoring the flag value.
509 // Once the JDK version reaches 'expired_in' limit, the JVM will flatly refuse to admit the
510 // existence of the flag.
511 //
512 // MANUAL CLEANUP ON JDK VERSION UPDATES:
513 // This table ensures that the handling of options will update automatically when the JDK
514 // version is incremented, but the source code needs to be cleanup up manually:
515 // - As "deprecated" options age into "obsolete" or "expired" options, the associated "globals"
516 // variable should be removed, as well as users of the variable.
517 // - As "deprecated" options age into "obsolete" options, move the entry into the
518 // "Obsolete Flags" section of the table.
519 // - All expired options should be removed from the table.
520 static SpecialFlag const special_jvm_flags[] = {
521 // -------------- Deprecated Flags --------------
522 // --- Non-alias flags - sorted by obsolete_in then expired_in:
523 { "MaxGCMinorPauseMillis", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() },
524 { "UseConcMarkSweepGC", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
525 { "AssumeMP", JDK_Version::jdk(10),JDK_Version::undefined(), JDK_Version::undefined() },
526 { "MonitorInUseLists", JDK_Version::jdk(10),JDK_Version::undefined(), JDK_Version::undefined() },
527 { "MaxRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
528 { "MinRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
529 { "InitialRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
530 { "UseMembar", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
531 { "IgnoreUnverifiableClassesDuringDump", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
532 { "CompilerThreadHintNoPreempt", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
533 { "VMThreadHintNoPreempt", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
534 { "PrintSafepointStatistics", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
535 { "PrintSafepointStatisticsTimeout", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
536 { "PrintSafepointStatisticsCount",JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
537 { "AggressiveOpts", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
538 { "AllowNonVirtualCalls", 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 { "UseAppCDS", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
565 { "InlineNotify", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
566 { "EnableTracing", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
567 { "UseLockedTracing", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
568
569 #ifdef TEST_VERIFY_SPECIAL_JVM_FLAGS
570 { "dep > obs", JDK_Version::jdk(9), JDK_Version::jdk(8), JDK_Version::undefined() },
571 { "dep > exp ", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(8) },
572 { "obs > exp ", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(8) },
573 { "not deprecated or obsolete", JDK_Version::undefined(), JDK_Version::undefined(), JDK_Version::jdk(9) },
574 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
575 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
576 { "BytecodeVerificationRemote", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::undefined() },
577 #endif
578
579 { NULL, JDK_Version(0), JDK_Version(0) }
580 };
581
582 // Flags that are aliases for other flags.
583 typedef struct {
584 const char* alias_name;
585 const char* real_name;
586 } AliasedFlag;
587
588 static AliasedFlag const aliased_jvm_flags[] = {
589 { "DefaultMaxRAMFraction", "MaxRAMFraction" },
590 { "CreateMinidumpOnCrash", "CreateCoredumpOnCrash" },
591 { NULL, NULL}
592 };
593
594 // NOTE: A compatibility request will be necessary for each alias to be removed.
595 static AliasedLoggingFlag const aliased_logging_flags[] = {
596 { "PrintCompressedOopsMode", LogLevel::Info, true, LOG_TAGS(gc, heap, coops) },
597 { "PrintSharedSpaces", LogLevel::Info, true, LOG_TAGS(cds) },
598 { "TraceBiasedLocking", LogLevel::Info, true, LOG_TAGS(biasedlocking) },
599 { "TraceClassLoading", LogLevel::Info, true, LOG_TAGS(class, load) },
600 { "TraceClassLoadingPreorder", LogLevel::Debug, true, LOG_TAGS(class, preorder) },
601 { "TraceClassPaths", LogLevel::Info, true, LOG_TAGS(class, path) },
602 { "TraceClassResolution", LogLevel::Debug, true, LOG_TAGS(class, resolve) },
603 { "TraceClassUnloading", LogLevel::Info, true, LOG_TAGS(class, unload) },
604 { "TraceExceptions", LogLevel::Info, true, LOG_TAGS(exceptions) },
605 { "TraceLoaderConstraints", LogLevel::Info, true, LOG_TAGS(class, loader, constraints) },
606 { "TraceMonitorInflation", LogLevel::Debug, true, LOG_TAGS(monitorinflation) },
607 { "TraceSafepointCleanupTime", LogLevel::Info, true, LOG_TAGS(safepoint, cleanup) },
608 { "TraceJVMTIObjectTagging", LogLevel::Debug, true, LOG_TAGS(jvmti, objecttagging) },
609 { "TraceRedefineClasses", LogLevel::Info, false, LOG_TAGS(redefine, class) },
610 { NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG) }
611 };
612
613 #ifndef PRODUCT
614 // These options are removed in jdk9. Remove this code for jdk10.
615 static AliasedFlag const removed_develop_logging_flags[] = {
616 { "TraceClassInitialization", "-Xlog:class+init" },
617 { "TraceClassLoaderData", "-Xlog:class+loader+data" },
618 { "TraceDefaultMethods", "-Xlog:defaultmethods=debug" },
619 { "TraceItables", "-Xlog:itables=debug" },
620 { "TraceMonitorMismatch", "-Xlog:monitormismatch=info" },
621 { "TraceSafepoint", "-Xlog:safepoint=debug" },
622 { "TraceStartupTime", "-Xlog:startuptime" },
623 { "TraceVMOperation", "-Xlog:vmoperation=debug" },
624 { "PrintVtables", "-Xlog:vtables=debug" },
625 { "VerboseVerification", "-Xlog:verification" },
626 { NULL, NULL }
627 };
628 #endif //PRODUCT
629
630 // Return true if "v" is less than "other", where "other" may be "undefined".
631 static bool version_less_than(JDK_Version v, JDK_Version other) {
632 assert(!v.is_undefined(), "must be defined");
633 if (!other.is_undefined() && v.compare(other) >= 0) {
634 return false;
635 } else {
636 return true;
637 }
638 }
639
640 extern bool lookup_special_flag_ext(const char *flag_name, SpecialFlag& flag);
641
642 static bool lookup_special_flag(const char *flag_name, SpecialFlag& flag) {
643 // Allow extensions to have priority
644 if (lookup_special_flag_ext(flag_name, flag)) {
645 return true;
646 }
647
648 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
649 if ((strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
650 flag = special_jvm_flags[i];
651 return true;
652 }
653 }
654 return false;
655 }
656
657 bool Arguments::is_obsolete_flag(const char *flag_name, JDK_Version* version) {
658 assert(version != NULL, "Must provide a version buffer");
659 SpecialFlag flag;
660 if (lookup_special_flag(flag_name, flag)) {
661 if (!flag.obsolete_in.is_undefined()) {
662 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) {
663 *version = flag.obsolete_in;
664 return true;
665 }
666 }
667 }
668 return false;
669 }
670
671 int Arguments::is_deprecated_flag(const char *flag_name, JDK_Version* version) {
672 assert(version != NULL, "Must provide a version buffer");
673 SpecialFlag flag;
674 if (lookup_special_flag(flag_name, flag)) {
675 if (!flag.deprecated_in.is_undefined()) {
676 if (version_less_than(JDK_Version::current(), flag.obsolete_in) &&
677 version_less_than(JDK_Version::current(), flag.expired_in)) {
678 *version = flag.deprecated_in;
679 return 1;
680 } else {
681 return -1;
682 }
683 }
684 }
685 return 0;
686 }
687
688 #ifndef PRODUCT
689 const char* Arguments::removed_develop_logging_flag_name(const char* name){
690 for (size_t i = 0; removed_develop_logging_flags[i].alias_name != NULL; i++) {
691 const AliasedFlag& flag = removed_develop_logging_flags[i];
692 if (strcmp(flag.alias_name, name) == 0) {
693 return flag.real_name;
694 }
695 }
696 return NULL;
697 }
698 #endif // PRODUCT
699
700 const char* Arguments::real_flag_name(const char *flag_name) {
701 for (size_t i = 0; aliased_jvm_flags[i].alias_name != NULL; i++) {
702 const AliasedFlag& flag_status = aliased_jvm_flags[i];
703 if (strcmp(flag_status.alias_name, flag_name) == 0) {
704 return flag_status.real_name;
705 }
706 }
707 return flag_name;
708 }
709
710 #ifdef ASSERT
711 static bool lookup_special_flag(const char *flag_name, size_t skip_index) {
712 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
713 if ((i != skip_index) && (strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
714 return true;
715 }
716 }
717 return false;
718 }
719
720 // Verifies the correctness of the entries in the special_jvm_flags table.
721 // If there is a semantic error (i.e. a bug in the table) such as the obsoletion
722 // version being earlier than the deprecation version, then a warning is issued
723 // and verification fails - by returning false. If it is detected that the table
724 // is out of date, with respect to the current version, then a warning is issued
725 // but verification does not fail. This allows the VM to operate when the version
726 // is first updated, without needing to update all the impacted flags at the
727 // same time.
728 static bool verify_special_jvm_flags() {
729 bool success = true;
730 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
731 const SpecialFlag& flag = special_jvm_flags[i];
732 if (lookup_special_flag(flag.name, i)) {
733 warning("Duplicate special flag declaration \"%s\"", flag.name);
734 success = false;
735 }
736 if (flag.deprecated_in.is_undefined() &&
737 flag.obsolete_in.is_undefined()) {
738 warning("Special flag entry \"%s\" must declare version deprecated and/or obsoleted in.", flag.name);
739 success = false;
740 }
741
742 if (!flag.deprecated_in.is_undefined()) {
743 if (!version_less_than(flag.deprecated_in, flag.obsolete_in)) {
744 warning("Special flag entry \"%s\" must be deprecated before obsoleted.", flag.name);
745 success = false;
746 }
747
748 if (!version_less_than(flag.deprecated_in, flag.expired_in)) {
749 warning("Special flag entry \"%s\" must be deprecated before expired.", flag.name);
750 success = false;
751 }
752 }
753
754 if (!flag.obsolete_in.is_undefined()) {
755 if (!version_less_than(flag.obsolete_in, flag.expired_in)) {
756 warning("Special flag entry \"%s\" must be obsoleted before expired.", flag.name);
757 success = false;
758 }
759
760 // if flag has become obsolete it should not have a "globals" flag defined anymore.
761 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) {
762 if (JVMFlag::find_flag(flag.name) != NULL) {
763 // Temporarily disable the warning: 8196739
764 // warning("Global variable for obsolete special flag entry \"%s\" should be removed", flag.name);
765 }
766 }
767 }
768
769 if (!flag.expired_in.is_undefined()) {
770 // if flag has become expired it should not have a "globals" flag defined anymore.
771 if (!version_less_than(JDK_Version::current(), flag.expired_in)) {
772 if (JVMFlag::find_flag(flag.name) != NULL) {
773 // Temporarily disable the warning: 8196739
774 // warning("Global variable for expired flag entry \"%s\" should be removed", flag.name);
775 }
776 }
777 }
778
779 }
780 return success;
781 }
782 #endif
783
784 // Parses a size specification string.
785 bool Arguments::atojulong(const char *s, julong* result) {
786 julong n = 0;
787
788 // First char must be a digit. Don't allow negative numbers or leading spaces.
789 if (!isdigit(*s)) {
790 return false;
791 }
792
793 bool is_hex = (s[0] == '0' && (s[1] == 'x' || s[1] == 'X'));
794 char* remainder;
795 errno = 0;
796 n = strtoull(s, &remainder, (is_hex ? 16 : 10));
797 if (errno != 0) {
798 return false;
799 }
800
801 // Fail if no number was read at all or if the remainder contains more than a single non-digit character.
802 if (remainder == s || strlen(remainder) > 1) {
803 return false;
804 }
805
806 switch (*remainder) {
807 case 'T': case 't':
808 *result = n * G * K;
809 // Check for overflow.
810 if (*result/((julong)G * K) != n) return false;
811 return true;
812 case 'G': case 'g':
813 *result = n * G;
814 if (*result/G != n) return false;
815 return true;
816 case 'M': case 'm':
817 *result = n * M;
818 if (*result/M != n) return false;
819 return true;
820 case 'K': case 'k':
821 *result = n * K;
822 if (*result/K != n) return false;
823 return true;
824 case '\0':
825 *result = n;
826 return true;
827 default:
828 return false;
829 }
830 }
831
832 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size, julong max_size) {
833 if (size < min_size) return arg_too_small;
834 if (size > max_size) return arg_too_big;
835 return arg_in_range;
836 }
837
838 // Describe an argument out of range error
839 void Arguments::describe_range_error(ArgsRange errcode) {
840 switch(errcode) {
841 case arg_too_big:
842 jio_fprintf(defaultStream::error_stream(),
843 "The specified size exceeds the maximum "
844 "representable size.\n");
845 break;
846 case arg_too_small:
847 case arg_unreadable:
848 case arg_in_range:
849 // do nothing for now
850 break;
851 default:
852 ShouldNotReachHere();
853 }
854 }
855
856 static bool set_bool_flag(const char* name, bool value, JVMFlag::Flags origin) {
857 if (JVMFlag::boolAtPut(name, &value, origin) == JVMFlag::SUCCESS) {
858 return true;
859 } else {
860 return false;
861 }
862 }
863
864 static bool set_fp_numeric_flag(const char* name, char* value, JVMFlag::Flags origin) {
865 char* end;
866 errno = 0;
867 double v = strtod(value, &end);
868 if ((errno != 0) || (*end != 0)) {
869 return false;
870 }
871
872 if (JVMFlag::doubleAtPut(name, &v, origin) == JVMFlag::SUCCESS) {
873 return true;
874 }
875 return false;
876 }
877
878 static bool set_numeric_flag(const char* name, char* value, JVMFlag::Flags origin) {
879 julong v;
880 int int_v;
881 intx intx_v;
882 bool is_neg = false;
883 JVMFlag* result = JVMFlag::find_flag(name, strlen(name));
884
885 if (result == NULL) {
886 return false;
887 }
888
889 // Check the sign first since atojulong() parses only unsigned values.
890 if (*value == '-') {
891 if (!result->is_intx() && !result->is_int()) {
892 return false;
893 }
894 value++;
895 is_neg = true;
896 }
897 if (!Arguments::atojulong(value, &v)) {
898 return false;
899 }
900 if (result->is_int()) {
901 int_v = (int) v;
902 if (is_neg) {
903 int_v = -int_v;
904 }
905 return JVMFlag::intAtPut(result, &int_v, origin) == JVMFlag::SUCCESS;
906 } else if (result->is_uint()) {
907 uint uint_v = (uint) v;
908 return JVMFlag::uintAtPut(result, &uint_v, origin) == JVMFlag::SUCCESS;
909 } else if (result->is_intx()) {
910 intx_v = (intx) v;
911 if (is_neg) {
912 intx_v = -intx_v;
913 }
914 return JVMFlag::intxAtPut(result, &intx_v, origin) == JVMFlag::SUCCESS;
915 } else if (result->is_uintx()) {
916 uintx uintx_v = (uintx) v;
917 return JVMFlag::uintxAtPut(result, &uintx_v, origin) == JVMFlag::SUCCESS;
918 } else if (result->is_uint64_t()) {
919 uint64_t uint64_t_v = (uint64_t) v;
920 return JVMFlag::uint64_tAtPut(result, &uint64_t_v, origin) == JVMFlag::SUCCESS;
921 } else if (result->is_size_t()) {
922 size_t size_t_v = (size_t) v;
923 return JVMFlag::size_tAtPut(result, &size_t_v, origin) == JVMFlag::SUCCESS;
924 } else if (result->is_double()) {
925 double double_v = (double) v;
926 return JVMFlag::doubleAtPut(result, &double_v, origin) == JVMFlag::SUCCESS;
927 } else {
928 return false;
929 }
930 }
931
932 static bool set_string_flag(const char* name, const char* value, JVMFlag::Flags origin) {
933 if (JVMFlag::ccstrAtPut(name, &value, origin) != JVMFlag::SUCCESS) return false;
934 // Contract: JVMFlag always returns a pointer that needs freeing.
935 FREE_C_HEAP_ARRAY(char, value);
936 return true;
937 }
938
939 static bool append_to_string_flag(const char* name, const char* new_value, JVMFlag::Flags origin) {
940 const char* old_value = "";
941 if (JVMFlag::ccstrAt(name, &old_value) != JVMFlag::SUCCESS) return false;
942 size_t old_len = old_value != NULL ? strlen(old_value) : 0;
943 size_t new_len = strlen(new_value);
944 const char* value;
945 char* free_this_too = NULL;
946 if (old_len == 0) {
947 value = new_value;
948 } else if (new_len == 0) {
949 value = old_value;
950 } else {
951 size_t length = old_len + 1 + new_len + 1;
952 char* buf = NEW_C_HEAP_ARRAY(char, length, mtArguments);
953 // each new setting adds another LINE to the switch:
954 jio_snprintf(buf, length, "%s\n%s", old_value, new_value);
955 value = buf;
956 free_this_too = buf;
957 }
958 (void) JVMFlag::ccstrAtPut(name, &value, origin);
959 // JVMFlag always returns a pointer that needs freeing.
960 FREE_C_HEAP_ARRAY(char, value);
961 if (free_this_too != NULL) {
962 // JVMFlag made its own copy, so I must delete my own temp. buffer.
963 FREE_C_HEAP_ARRAY(char, free_this_too);
964 }
965 return true;
966 }
967
968 const char* Arguments::handle_aliases_and_deprecation(const char* arg, bool warn) {
969 const char* real_name = real_flag_name(arg);
970 JDK_Version since = JDK_Version();
971 switch (is_deprecated_flag(arg, &since)) {
972 case -1:
973 return NULL; // obsolete or expired, don't process normally
974 case 0:
975 return real_name;
976 case 1: {
977 if (warn) {
978 char version[256];
979 since.to_string(version, sizeof(version));
980 if (real_name != arg) {
981 warning("Option %s was deprecated in version %s and will likely be removed in a future release. Use option %s instead.",
982 arg, version, real_name);
983 } else {
984 warning("Option %s was deprecated in version %s and will likely be removed in a future release.",
985 arg, version);
986 }
987 }
988 return real_name;
989 }
990 }
991 ShouldNotReachHere();
992 return NULL;
993 }
994
995 void log_deprecated_flag(const char* name, bool on, AliasedLoggingFlag alf) {
996 LogTagType tagSet[] = {alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5};
997 // Set tagset string buffer at max size of 256, large enough for any alias tagset
998 const int max_tagset_size = 256;
999 int max_tagset_len = max_tagset_size - 1;
1000 char tagset_buffer[max_tagset_size];
1001 tagset_buffer[0] = '\0';
1002
1003 // Write tag-set for aliased logging option, in string list form
1004 int max_tags = sizeof(tagSet)/sizeof(tagSet[0]);
1005 for (int i = 0; i < max_tags && tagSet[i] != LogTag::__NO_TAG; i++) {
1006 if (i > 0) {
1007 strncat(tagset_buffer, "+", max_tagset_len - strlen(tagset_buffer));
1008 }
1009 strncat(tagset_buffer, LogTag::name(tagSet[i]), max_tagset_len - strlen(tagset_buffer));
1010 }
1011 if (!alf.exactMatch) {
1012 strncat(tagset_buffer, "*", max_tagset_len - strlen(tagset_buffer));
1013 }
1014 log_warning(arguments)("-XX:%s%s is deprecated. Will use -Xlog:%s=%s instead.",
1015 (on) ? "+" : "-",
1016 name,
1017 tagset_buffer,
1018 (on) ? LogLevel::name(alf.level) : "off");
1019 }
1020
1021 AliasedLoggingFlag Arguments::catch_logging_aliases(const char* name, bool on){
1022 for (size_t i = 0; aliased_logging_flags[i].alias_name != NULL; i++) {
1023 const AliasedLoggingFlag& alf = aliased_logging_flags[i];
1024 if (strcmp(alf.alias_name, name) == 0) {
1025 log_deprecated_flag(name, on, alf);
1026 return alf;
1027 }
1028 }
1029 AliasedLoggingFlag a = {NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG)};
1030 return a;
1031 }
1032
1033 bool Arguments::parse_argument(const char* arg, JVMFlag::Flags origin) {
1034
1035 // range of acceptable characters spelled out for portability reasons
1036 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]"
1037 #define BUFLEN 255
1038 char name[BUFLEN+1];
1039 char dummy;
1040 const char* real_name;
1041 bool warn_if_deprecated = true;
1042
1043 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
1044 AliasedLoggingFlag alf = catch_logging_aliases(name, false);
1045 if (alf.alias_name != NULL){
1046 LogConfiguration::configure_stdout(LogLevel::Off, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
1047 return true;
1048 }
1049 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1050 if (real_name == NULL) {
1051 return false;
1052 }
1053 return set_bool_flag(real_name, false, origin);
1054 }
1055 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
1056 AliasedLoggingFlag alf = catch_logging_aliases(name, true);
1057 if (alf.alias_name != NULL){
1058 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
1059 return true;
1060 }
1061 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1062 if (real_name == NULL) {
1063 return false;
1064 }
1065 return set_bool_flag(real_name, true, origin);
1066 }
1067
1068 char punct;
1069 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') {
1070 const char* value = strchr(arg, '=') + 1;
1071 JVMFlag* flag;
1072
1073 // this scanf pattern matches both strings (handled here) and numbers (handled later))
1074 AliasedLoggingFlag alf = catch_logging_aliases(name, true);
1075 if (alf.alias_name != NULL) {
1076 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
1077 return true;
1078 }
1079 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1080 if (real_name == NULL) {
1081 return false;
1082 }
1083 flag = JVMFlag::find_flag(real_name);
1084 if (flag != NULL && flag->is_ccstr()) {
1085 if (flag->ccstr_accumulates()) {
1086 return append_to_string_flag(real_name, value, origin);
1087 } else {
1088 if (value[0] == '\0') {
1089 value = NULL;
1090 }
1091 return set_string_flag(real_name, value, origin);
1092 }
1093 } else {
1094 warn_if_deprecated = false; // if arg is deprecated, we've already done warning...
1095 }
1096 }
1097
1098 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') {
1099 const char* value = strchr(arg, '=') + 1;
1100 // -XX:Foo:=xxx will reset the string flag to the given value.
1101 if (value[0] == '\0') {
1102 value = NULL;
1103 }
1104 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1105 if (real_name == NULL) {
1106 return false;
1107 }
1108 return set_string_flag(real_name, value, origin);
1109 }
1110
1111 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.eE+]"
1112 #define SIGNED_NUMBER_RANGE "[-0123456789]"
1113 #define NUMBER_RANGE "[0123456789eE+-]"
1114 char value[BUFLEN + 1];
1115 char value2[BUFLEN + 1];
1116 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) {
1117 // Looks like a floating-point number -- try again with more lenient format string
1118 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) {
1119 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1120 if (real_name == NULL) {
1121 return false;
1122 }
1123 return set_fp_numeric_flag(real_name, value, origin);
1124 }
1125 }
1126
1127 #define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]"
1128 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) {
1129 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1130 if (real_name == NULL) {
1131 return false;
1132 }
1133 return set_numeric_flag(real_name, value, origin);
1134 }
1135
1136 return false;
1137 }
1138
1139 void Arguments::add_string(char*** bldarray, int* count, const char* arg) {
1140 assert(bldarray != NULL, "illegal argument");
1141
1142 if (arg == NULL) {
1143 return;
1144 }
1145
1146 int new_count = *count + 1;
1147
1148 // expand the array and add arg to the last element
1149 if (*bldarray == NULL) {
1150 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtArguments);
1151 } else {
1152 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtArguments);
1153 }
1154 (*bldarray)[*count] = os::strdup_check_oom(arg);
1155 *count = new_count;
1156 }
1157
1158 void Arguments::build_jvm_args(const char* arg) {
1159 add_string(&_jvm_args_array, &_num_jvm_args, arg);
1160 }
1161
1162 void Arguments::build_jvm_flags(const char* arg) {
1163 add_string(&_jvm_flags_array, &_num_jvm_flags, arg);
1164 }
1165
1166 // utility function to return a string that concatenates all
1167 // strings in a given char** array
1168 const char* Arguments::build_resource_string(char** args, int count) {
1169 if (args == NULL || count == 0) {
1170 return NULL;
1171 }
1172 size_t length = 0;
1173 for (int i = 0; i < count; i++) {
1174 length += strlen(args[i]) + 1; // add 1 for a space or NULL terminating character
1175 }
1176 char* s = NEW_RESOURCE_ARRAY(char, length);
1177 char* dst = s;
1178 for (int j = 0; j < count; j++) {
1179 size_t offset = strlen(args[j]) + 1; // add 1 for a space or NULL terminating character
1180 jio_snprintf(dst, length, "%s ", args[j]); // jio_snprintf will replace the last space character with NULL character
1181 dst += offset;
1182 length -= offset;
1183 }
1184 return (const char*) s;
1185 }
1186
1187 void Arguments::print_on(outputStream* st) {
1188 st->print_cr("VM Arguments:");
1189 if (num_jvm_flags() > 0) {
1190 st->print("jvm_flags: "); print_jvm_flags_on(st);
1191 st->cr();
1192 }
1193 if (num_jvm_args() > 0) {
1194 st->print("jvm_args: "); print_jvm_args_on(st);
1195 st->cr();
1196 }
1197 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>");
1198 if (_java_class_path != NULL) {
1199 char* path = _java_class_path->value();
1200 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path );
1201 }
1202 st->print_cr("Launcher Type: %s", _sun_java_launcher);
1203 }
1204
1205 void Arguments::print_summary_on(outputStream* st) {
1206 // Print the command line. Environment variables that are helpful for
1207 // reproducing the problem are written later in the hs_err file.
1208 // flags are from setting file
1209 if (num_jvm_flags() > 0) {
1210 st->print_raw("Settings File: ");
1211 print_jvm_flags_on(st);
1212 st->cr();
1213 }
1214 // args are the command line and environment variable arguments.
1215 st->print_raw("Command Line: ");
1216 if (num_jvm_args() > 0) {
1217 print_jvm_args_on(st);
1218 }
1219 // this is the classfile and any arguments to the java program
1220 if (java_command() != NULL) {
1221 st->print("%s", java_command());
1222 }
1223 st->cr();
1224 }
1225
1226 void Arguments::print_jvm_flags_on(outputStream* st) {
1227 if (_num_jvm_flags > 0) {
1228 for (int i=0; i < _num_jvm_flags; i++) {
1229 st->print("%s ", _jvm_flags_array[i]);
1230 }
1231 }
1232 }
1233
1234 void Arguments::print_jvm_args_on(outputStream* st) {
1235 if (_num_jvm_args > 0) {
1236 for (int i=0; i < _num_jvm_args; i++) {
1237 st->print("%s ", _jvm_args_array[i]);
1238 }
1239 }
1240 }
1241
1242 bool Arguments::process_argument(const char* arg,
1243 jboolean ignore_unrecognized,
1244 JVMFlag::Flags origin) {
1245 JDK_Version since = JDK_Version();
1246
1247 if (parse_argument(arg, origin)) {
1248 return true;
1249 }
1250
1251 // Determine if the flag has '+', '-', or '=' characters.
1252 bool has_plus_minus = (*arg == '+' || *arg == '-');
1253 const char* const argname = has_plus_minus ? arg + 1 : arg;
1254
1255 size_t arg_len;
1256 const char* equal_sign = strchr(argname, '=');
1257 if (equal_sign == NULL) {
1258 arg_len = strlen(argname);
1259 } else {
1260 arg_len = equal_sign - argname;
1261 }
1262
1263 // Only make the obsolete check for valid arguments.
1264 if (arg_len <= BUFLEN) {
1265 // Construct a string which consists only of the argument name without '+', '-', or '='.
1266 char stripped_argname[BUFLEN+1]; // +1 for '\0'
1267 jio_snprintf(stripped_argname, arg_len+1, "%s", argname); // +1 for '\0'
1268 if (is_obsolete_flag(stripped_argname, &since)) {
1269 if (strcmp(stripped_argname, "UseAppCDS") != 0) {
1270 char version[256];
1271 since.to_string(version, sizeof(version));
1272 warning("Ignoring option %s; support was removed in %s", stripped_argname, version);
1273 } else {
1274 warning("Ignoring obsolete option UseAppCDS; AppCDS is automatically enabled");
1275 }
1276 return true;
1277 }
1278 #ifndef PRODUCT
1279 else {
1280 const char* replacement;
1281 if ((replacement = removed_develop_logging_flag_name(stripped_argname)) != NULL){
1282 log_warning(arguments)("%s has been removed. Please use %s instead.",
1283 stripped_argname,
1284 replacement);
1285 return false;
1286 }
1287 }
1288 #endif //PRODUCT
1289 }
1290
1291 // For locked flags, report a custom error message if available.
1292 // Otherwise, report the standard unrecognized VM option.
1293 JVMFlag* found_flag = JVMFlag::find_flag((const char*)argname, arg_len, true, true);
1294 if (found_flag != NULL) {
1295 char locked_message_buf[BUFLEN];
1296 JVMFlag::MsgType msg_type = found_flag->get_locked_message(locked_message_buf, BUFLEN);
1297 if (strlen(locked_message_buf) == 0) {
1298 if (found_flag->is_bool() && !has_plus_minus) {
1299 jio_fprintf(defaultStream::error_stream(),
1300 "Missing +/- setting for VM option '%s'\n", argname);
1301 } else if (!found_flag->is_bool() && has_plus_minus) {
1302 jio_fprintf(defaultStream::error_stream(),
1303 "Unexpected +/- setting in VM option '%s'\n", argname);
1304 } else {
1305 jio_fprintf(defaultStream::error_stream(),
1306 "Improperly specified VM option '%s'\n", argname);
1307 }
1308 } else {
1309 #ifdef PRODUCT
1310 bool mismatched = ((msg_type == JVMFlag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD) ||
1311 (msg_type == JVMFlag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD));
1312 if (ignore_unrecognized && mismatched) {
1313 return true;
1314 }
1315 #endif
1316 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf);
1317 }
1318 } else {
1319 if (ignore_unrecognized) {
1320 return true;
1321 }
1322 jio_fprintf(defaultStream::error_stream(),
1323 "Unrecognized VM option '%s'\n", argname);
1324 JVMFlag* fuzzy_matched = JVMFlag::fuzzy_match((const char*)argname, arg_len, true);
1325 if (fuzzy_matched != NULL) {
1326 jio_fprintf(defaultStream::error_stream(),
1327 "Did you mean '%s%s%s'? ",
1328 (fuzzy_matched->is_bool()) ? "(+/-)" : "",
1329 fuzzy_matched->_name,
1330 (fuzzy_matched->is_bool()) ? "" : "=<value>");
1331 }
1332 }
1333
1334 // allow for commandline "commenting out" options like -XX:#+Verbose
1335 return arg[0] == '#';
1336 }
1337
1338 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) {
1339 FILE* stream = fopen(file_name, "rb");
1340 if (stream == NULL) {
1341 if (should_exist) {
1342 jio_fprintf(defaultStream::error_stream(),
1343 "Could not open settings file %s\n", file_name);
1344 return false;
1345 } else {
1346 return true;
1347 }
1348 }
1349
1350 char token[1024];
1351 int pos = 0;
1352
1353 bool in_white_space = true;
1354 bool in_comment = false;
1355 bool in_quote = false;
1356 char quote_c = 0;
1357 bool result = true;
1358
1359 int c = getc(stream);
1360 while(c != EOF && pos < (int)(sizeof(token)-1)) {
1361 if (in_white_space) {
1362 if (in_comment) {
1363 if (c == '\n') in_comment = false;
1364 } else {
1365 if (c == '#') in_comment = true;
1366 else if (!isspace(c)) {
1367 in_white_space = false;
1368 token[pos++] = c;
1369 }
1370 }
1371 } else {
1372 if (c == '\n' || (!in_quote && isspace(c))) {
1373 // token ends at newline, or at unquoted whitespace
1374 // this allows a way to include spaces in string-valued options
1375 token[pos] = '\0';
1376 logOption(token);
1377 result &= process_argument(token, ignore_unrecognized, JVMFlag::CONFIG_FILE);
1378 build_jvm_flags(token);
1379 pos = 0;
1380 in_white_space = true;
1381 in_quote = false;
1382 } else if (!in_quote && (c == '\'' || c == '"')) {
1383 in_quote = true;
1384 quote_c = c;
1385 } else if (in_quote && (c == quote_c)) {
1386 in_quote = false;
1387 } else {
1388 token[pos++] = c;
1389 }
1390 }
1391 c = getc(stream);
1392 }
1393 if (pos > 0) {
1394 token[pos] = '\0';
1395 result &= process_argument(token, ignore_unrecognized, JVMFlag::CONFIG_FILE);
1396 build_jvm_flags(token);
1397 }
1398 fclose(stream);
1399 return result;
1400 }
1401
1402 //=============================================================================================================
1403 // Parsing of properties (-D)
1404
1405 const char* Arguments::get_property(const char* key) {
1406 return PropertyList_get_value(system_properties(), key);
1407 }
1408
1409 bool Arguments::add_property(const char* prop, PropertyWriteable writeable, PropertyInternal internal) {
1410 const char* eq = strchr(prop, '=');
1411 const char* key;
1412 const char* value = "";
1413
1414 if (eq == NULL) {
1415 // property doesn't have a value, thus use passed string
1416 key = prop;
1417 } else {
1418 // property have a value, thus extract it and save to the
1419 // allocated string
1420 size_t key_len = eq - prop;
1421 char* tmp_key = AllocateHeap(key_len + 1, mtArguments);
1422
1423 jio_snprintf(tmp_key, key_len + 1, "%s", prop);
1424 key = tmp_key;
1425
1426 value = &prop[key_len + 1];
1427 }
1428
1429 if (strcmp(key, "java.compiler") == 0) {
1430 process_java_compiler_argument(value);
1431 // Record value in Arguments, but let it get passed to Java.
1432 } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 ||
1433 strcmp(key, "sun.java.launcher.pid") == 0) {
1434 // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are
1435 // private and are processed in process_sun_java_launcher_properties();
1436 // the sun.java.launcher property is passed on to the java application
1437 } else if (strcmp(key, "sun.boot.library.path") == 0) {
1438 // append is true, writable is true, internal is false
1439 PropertyList_unique_add(&_system_properties, key, value, AppendProperty,
1440 WriteableProperty, ExternalProperty);
1441 } else {
1442 if (strcmp(key, "sun.java.command") == 0) {
1443 char *old_java_command = _java_command;
1444 _java_command = os::strdup_check_oom(value, mtArguments);
1445 if (old_java_command != NULL) {
1446 os::free(old_java_command);
1447 }
1448 } else if (strcmp(key, "java.vendor.url.bug") == 0) {
1449 const char* old_java_vendor_url_bug = _java_vendor_url_bug;
1450 // save it in _java_vendor_url_bug, so JVM fatal error handler can access
1451 // its value without going through the property list or making a Java call.
1452 _java_vendor_url_bug = os::strdup_check_oom(value, mtArguments);
1453 if (old_java_vendor_url_bug != DEFAULT_VENDOR_URL_BUG) {
1454 assert(old_java_vendor_url_bug != NULL, "_java_vendor_url_bug is NULL");
1455 os::free((void *)old_java_vendor_url_bug);
1456 }
1457 }
1458
1459 // Create new property and add at the end of the list
1460 PropertyList_unique_add(&_system_properties, key, value, AddProperty, writeable, internal);
1461 }
1462
1463 if (key != prop) {
1464 // SystemProperty copy passed value, thus free previously allocated
1465 // memory
1466 FreeHeap((void *)key);
1467 }
1468
1469 return true;
1470 }
1471
1472 #if INCLUDE_CDS
1473 const char* unsupported_properties[] = { "jdk.module.limitmods",
1474 "jdk.module.upgrade.path",
1475 "jdk.module.patch.0" };
1476 const char* unsupported_options[] = { "--limit-modules",
1477 "--upgrade-module-path",
1478 "--patch-module"
1479 };
1480 void Arguments::check_unsupported_dumping_properties() {
1481 assert(DumpSharedSpaces, "this function is only used with -Xshare:dump");
1482 assert(ARRAY_SIZE(unsupported_properties) == ARRAY_SIZE(unsupported_options), "must be");
1483 // If a vm option is found in the unsupported_options array, vm will exit with an error message.
1484 SystemProperty* sp = system_properties();
1485 while (sp != NULL) {
1486 for (uint i = 0; i < ARRAY_SIZE(unsupported_properties); i++) {
1487 if (strcmp(sp->key(), unsupported_properties[i]) == 0) {
1488 vm_exit_during_initialization(
1489 "Cannot use the following option when dumping the shared archive", unsupported_options[i]);
1490 }
1491 }
1492 sp = sp->next();
1493 }
1494
1495 // Check for an exploded module build in use with -Xshare:dump.
1496 if (!has_jimage()) {
1497 vm_exit_during_initialization("Dumping the shared archive is not supported with an exploded module build");
1498 }
1499 }
1500
1501 bool Arguments::check_unsupported_cds_runtime_properties() {
1502 assert(UseSharedSpaces, "this function is only used with -Xshare:{on,auto}");
1503 assert(ARRAY_SIZE(unsupported_properties) == ARRAY_SIZE(unsupported_options), "must be");
1504 for (uint i = 0; i < ARRAY_SIZE(unsupported_properties); i++) {
1505 if (get_property(unsupported_properties[i]) != NULL) {
1506 if (RequireSharedSpaces) {
1507 warning("CDS is disabled when the %s option is specified.", unsupported_options[i]);
1508 }
1509 return true;
1510 }
1511 }
1512 return false;
1513 }
1514 #endif
1515
1516 //===========================================================================================================
1517 // Setting int/mixed/comp mode flags
1518
1519 void Arguments::set_mode_flags(Mode mode) {
1520 // Set up default values for all flags.
1521 // If you add a flag to any of the branches below,
1522 // add a default value for it here.
1523 set_java_compiler(false);
1524 _mode = mode;
1525
1526 // Ensure Agent_OnLoad has the correct initial values.
1527 // This may not be the final mode; mode may change later in onload phase.
1528 PropertyList_unique_add(&_system_properties, "java.vm.info",
1529 VM_Version::vm_info_string(), AddProperty, UnwriteableProperty, ExternalProperty);
1530
1531 UseInterpreter = true;
1532 UseCompiler = true;
1533 UseLoopCounter = true;
1534
1535 // Default values may be platform/compiler dependent -
1536 // use the saved values
1537 ClipInlining = Arguments::_ClipInlining;
1538 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods;
1539 UseOnStackReplacement = Arguments::_UseOnStackReplacement;
1540 BackgroundCompilation = Arguments::_BackgroundCompilation;
1541 if (TieredCompilation) {
1542 if (FLAG_IS_DEFAULT(Tier3InvokeNotifyFreqLog)) {
1543 Tier3InvokeNotifyFreqLog = Arguments::_Tier3InvokeNotifyFreqLog;
1544 }
1545 if (FLAG_IS_DEFAULT(Tier4InvocationThreshold)) {
1546 Tier4InvocationThreshold = Arguments::_Tier4InvocationThreshold;
1547 }
1548 }
1549
1550 // Change from defaults based on mode
1551 switch (mode) {
1552 default:
1553 ShouldNotReachHere();
1554 break;
1555 case _int:
1556 UseCompiler = false;
1557 UseLoopCounter = false;
1558 AlwaysCompileLoopMethods = false;
1559 UseOnStackReplacement = false;
1560 break;
1561 case _mixed:
1562 // same as default
1563 break;
1564 case _comp:
1565 UseInterpreter = false;
1566 BackgroundCompilation = false;
1567 ClipInlining = false;
1568 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more.
1569 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and
1570 // compile a level 4 (C2) and then continue executing it.
1571 if (TieredCompilation) {
1572 Tier3InvokeNotifyFreqLog = 0;
1573 Tier4InvocationThreshold = 0;
1574 }
1575 break;
1576 }
1577 }
1578
1579 // Conflict: required to use shared spaces (-Xshare:on), but
1580 // incompatible command line options were chosen.
1581 static void no_shared_spaces(const char* message) {
1582 if (RequireSharedSpaces) {
1583 jio_fprintf(defaultStream::error_stream(),
1584 "Class data sharing is inconsistent with other specified options.\n");
1585 vm_exit_during_initialization("Unable to use shared archive.", message);
1586 } else {
1587 FLAG_SET_DEFAULT(UseSharedSpaces, false);
1588 }
1589 }
1590
1591 // Returns threshold scaled with the value of scale.
1592 // If scale < 0.0, threshold is returned without scaling.
1593 intx Arguments::scaled_compile_threshold(intx threshold, double scale) {
1594 if (scale == 1.0 || scale < 0.0) {
1595 return threshold;
1596 } else {
1597 return (intx)(threshold * scale);
1598 }
1599 }
1600
1601 // Returns freq_log scaled with the value of scale.
1602 // Returned values are in the range of [0, InvocationCounter::number_of_count_bits + 1].
1603 // If scale < 0.0, freq_log is returned without scaling.
1604 intx Arguments::scaled_freq_log(intx freq_log, double scale) {
1605 // Check if scaling is necessary or if negative value was specified.
1606 if (scale == 1.0 || scale < 0.0) {
1607 return freq_log;
1608 }
1609 // Check values to avoid calculating log2 of 0.
1610 if (scale == 0.0 || freq_log == 0) {
1611 return 0;
1612 }
1613 // Determine the maximum notification frequency value currently supported.
1614 // The largest mask value that the interpreter/C1 can handle is
1615 // of length InvocationCounter::number_of_count_bits. Mask values are always
1616 // one bit shorter then the value of the notification frequency. Set
1617 // max_freq_bits accordingly.
1618 intx max_freq_bits = InvocationCounter::number_of_count_bits + 1;
1619 intx scaled_freq = scaled_compile_threshold((intx)1 << freq_log, scale);
1620 if (scaled_freq == 0) {
1621 // Return 0 right away to avoid calculating log2 of 0.
1622 return 0;
1623 } else if (scaled_freq > nth_bit(max_freq_bits)) {
1624 return max_freq_bits;
1625 } else {
1626 return log2_intptr(scaled_freq);
1627 }
1628 }
1629
1630 void Arguments::set_tiered_flags() {
1631 // With tiered, set default policy to SimpleThresholdPolicy, which is 2.
1632 if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) {
1633 FLAG_SET_DEFAULT(CompilationPolicyChoice, 2);
1634 }
1635 if (CompilationPolicyChoice < 2) {
1636 vm_exit_during_initialization(
1637 "Incompatible compilation policy selected", NULL);
1638 }
1639 // Increase the code cache size - tiered compiles a lot more.
1640 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
1641 FLAG_SET_ERGO(uintx, ReservedCodeCacheSize,
1642 MIN2(CODE_CACHE_DEFAULT_LIMIT, ReservedCodeCacheSize * 5));
1643 }
1644 // Enable SegmentedCodeCache if TieredCompilation is enabled and ReservedCodeCacheSize >= 240M
1645 if (FLAG_IS_DEFAULT(SegmentedCodeCache) && ReservedCodeCacheSize >= 240*M) {
1646 FLAG_SET_ERGO(bool, SegmentedCodeCache, true);
1647 }
1648 if (!UseInterpreter) { // -Xcomp
1649 Tier3InvokeNotifyFreqLog = 0;
1650 Tier4InvocationThreshold = 0;
1651 }
1652
1653 if (CompileThresholdScaling < 0) {
1654 vm_exit_during_initialization("Negative value specified for CompileThresholdScaling", NULL);
1655 }
1656
1657 // Scale tiered compilation thresholds.
1658 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves compilation thresholds unchanged.
1659 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
1660 FLAG_SET_ERGO(intx, Tier0InvokeNotifyFreqLog, scaled_freq_log(Tier0InvokeNotifyFreqLog));
1661 FLAG_SET_ERGO(intx, Tier0BackedgeNotifyFreqLog, scaled_freq_log(Tier0BackedgeNotifyFreqLog));
1662
1663 FLAG_SET_ERGO(intx, Tier3InvocationThreshold, scaled_compile_threshold(Tier3InvocationThreshold));
1664 FLAG_SET_ERGO(intx, Tier3MinInvocationThreshold, scaled_compile_threshold(Tier3MinInvocationThreshold));
1665 FLAG_SET_ERGO(intx, Tier3CompileThreshold, scaled_compile_threshold(Tier3CompileThreshold));
1666 FLAG_SET_ERGO(intx, Tier3BackEdgeThreshold, scaled_compile_threshold(Tier3BackEdgeThreshold));
1667
1668 // Tier2{Invocation,MinInvocation,Compile,Backedge}Threshold should be scaled here
1669 // once these thresholds become supported.
1670
1671 FLAG_SET_ERGO(intx, Tier2InvokeNotifyFreqLog, scaled_freq_log(Tier2InvokeNotifyFreqLog));
1672 FLAG_SET_ERGO(intx, Tier2BackedgeNotifyFreqLog, scaled_freq_log(Tier2BackedgeNotifyFreqLog));
1673
1674 FLAG_SET_ERGO(intx, Tier3InvokeNotifyFreqLog, scaled_freq_log(Tier3InvokeNotifyFreqLog));
1675 FLAG_SET_ERGO(intx, Tier3BackedgeNotifyFreqLog, scaled_freq_log(Tier3BackedgeNotifyFreqLog));
1676
1677 FLAG_SET_ERGO(intx, Tier23InlineeNotifyFreqLog, scaled_freq_log(Tier23InlineeNotifyFreqLog));
1678
1679 FLAG_SET_ERGO(intx, Tier4InvocationThreshold, scaled_compile_threshold(Tier4InvocationThreshold));
1680 FLAG_SET_ERGO(intx, Tier4MinInvocationThreshold, scaled_compile_threshold(Tier4MinInvocationThreshold));
1681 FLAG_SET_ERGO(intx, Tier4CompileThreshold, scaled_compile_threshold(Tier4CompileThreshold));
1682 FLAG_SET_ERGO(intx, Tier4BackEdgeThreshold, scaled_compile_threshold(Tier4BackEdgeThreshold));
1683 }
1684 }
1685
1686 void set_object_alignment() {
1687 // Object alignment.
1688 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2");
1689 MinObjAlignmentInBytes = ObjectAlignmentInBytes;
1690 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small");
1691 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize;
1692 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect");
1693 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1;
1694
1695 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes);
1696 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize;
1697
1698 // Oop encoding heap max
1699 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes;
1700
1701 if (SurvivorAlignmentInBytes == 0) {
1702 SurvivorAlignmentInBytes = ObjectAlignmentInBytes;
1703 }
1704 }
1705
1706 size_t Arguments::max_heap_for_compressed_oops() {
1707 // Avoid sign flip.
1708 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size");
1709 // We need to fit both the NULL page and the heap into the memory budget, while
1710 // keeping alignment constraints of the heap. To guarantee the latter, as the
1711 // NULL page is located before the heap, we pad the NULL page to the conservative
1712 // maximum alignment that the GC may ever impose upon the heap.
1713 size_t displacement_due_to_null_page = align_up((size_t)os::vm_page_size(),
1714 _conservative_max_heap_alignment);
1715
1716 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page);
1717 NOT_LP64(ShouldNotReachHere(); return 0);
1718 }
1719
1720 void Arguments::set_use_compressed_oops() {
1721 #ifndef ZERO
1722 #ifdef _LP64
1723 // MaxHeapSize is not set up properly at this point, but
1724 // the only value that can override MaxHeapSize if we are
1725 // to use UseCompressedOops is InitialHeapSize.
1726 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize);
1727
1728 if (max_heap_size <= max_heap_for_compressed_oops()) {
1729 #if !defined(COMPILER1) || defined(TIERED)
1730 if (FLAG_IS_DEFAULT(UseCompressedOops)) {
1731 FLAG_SET_ERGO(bool, UseCompressedOops, true);
1732 }
1733 #endif
1734 } else {
1735 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) {
1736 warning("Max heap size too large for Compressed Oops");
1737 FLAG_SET_DEFAULT(UseCompressedOops, false);
1738 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1739 }
1740 }
1741 #endif // _LP64
1742 #endif // ZERO
1743 }
1744
1745
1746 // NOTE: set_use_compressed_klass_ptrs() must be called after calling
1747 // set_use_compressed_oops().
1748 void Arguments::set_use_compressed_klass_ptrs() {
1749 #ifndef ZERO
1750 #ifdef _LP64
1751 // UseCompressedOops must be on for UseCompressedClassPointers to be on.
1752 if (!UseCompressedOops) {
1753 if (UseCompressedClassPointers) {
1754 warning("UseCompressedClassPointers requires UseCompressedOops");
1755 }
1756 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1757 } else {
1758 // Turn on UseCompressedClassPointers too
1759 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) {
1760 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true);
1761 }
1762 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs.
1763 if (UseCompressedClassPointers) {
1764 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) {
1765 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers");
1766 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1767 }
1768 }
1769 }
1770 #endif // _LP64
1771 #endif // !ZERO
1772 }
1773
1774 void Arguments::set_conservative_max_heap_alignment() {
1775 // The conservative maximum required alignment for the heap is the maximum of
1776 // the alignments imposed by several sources: any requirements from the heap
1777 // itself, the collector policy and the maximum page size we may run the VM
1778 // with.
1779 size_t heap_alignment = GCConfig::arguments()->conservative_max_heap_alignment();
1780 _conservative_max_heap_alignment = MAX4(heap_alignment,
1781 (size_t)os::vm_allocation_granularity(),
1782 os::max_page_size(),
1783 CollectorPolicy::compute_heap_alignment());
1784 }
1785
1786 #ifdef TIERED
1787 bool Arguments::compilation_mode_selected() {
1788 return !FLAG_IS_DEFAULT(TieredCompilation) || !FLAG_IS_DEFAULT(TieredStopAtLevel) ||
1789 !FLAG_IS_DEFAULT(UseAOT) JVMCI_ONLY(|| !FLAG_IS_DEFAULT(EnableJVMCI) || !FLAG_IS_DEFAULT(UseJVMCICompiler));
1790
1791 }
1792
1793 void Arguments::select_compilation_mode_ergonomically() {
1794 #if defined(_WINDOWS) && !defined(_LP64)
1795 if (FLAG_IS_DEFAULT(NeverActAsServerClassMachine)) {
1796 FLAG_SET_ERGO(bool, NeverActAsServerClassMachine, true);
1797 }
1798 #endif
1799 if (NeverActAsServerClassMachine) {
1800 set_client_compilation_mode();
1801 }
1802 }
1803 #endif //TIERED
1804
1805 #if INCLUDE_JVMCI
1806 void Arguments::set_jvmci_specific_flags() {
1807 if (UseJVMCICompiler) {
1808 if (FLAG_IS_DEFAULT(TypeProfileWidth)) {
1809 FLAG_SET_DEFAULT(TypeProfileWidth, 8);
1810 }
1811 if (FLAG_IS_DEFAULT(OnStackReplacePercentage)) {
1812 FLAG_SET_DEFAULT(OnStackReplacePercentage, 933);
1813 }
1814 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
1815 FLAG_SET_DEFAULT(ReservedCodeCacheSize, 64*M);
1816 }
1817 if (FLAG_IS_DEFAULT(InitialCodeCacheSize)) {
1818 FLAG_SET_DEFAULT(InitialCodeCacheSize, 16*M);
1819 }
1820 if (FLAG_IS_DEFAULT(MetaspaceSize)) {
1821 FLAG_SET_DEFAULT(MetaspaceSize, 12*M);
1822 }
1823 if (FLAG_IS_DEFAULT(NewSizeThreadIncrease)) {
1824 FLAG_SET_DEFAULT(NewSizeThreadIncrease, 4*K);
1825 }
1826 if (TieredStopAtLevel != CompLevel_full_optimization) {
1827 // Currently JVMCI compiler can only work at the full optimization level
1828 warning("forcing TieredStopAtLevel to full optimization because JVMCI is enabled");
1829 TieredStopAtLevel = CompLevel_full_optimization;
1830 }
1831 if (FLAG_IS_DEFAULT(TypeProfileLevel)) {
1832 FLAG_SET_DEFAULT(TypeProfileLevel, 0);
1833 }
1834 }
1835 }
1836 #endif
1837
1838 jint Arguments::set_ergonomics_flags() {
1839 #ifdef TIERED
1840 if (!compilation_mode_selected()) {
1841 select_compilation_mode_ergonomically();
1842 }
1843 #endif
1844
1845 GCConfig::initialize();
1846
1847 #if defined(IA32)
1848 // Only server compiler can optimize safepoints well enough.
1849 if (!is_server_compilation_mode_vm()) {
1850 FLAG_SET_ERGO_IF_DEFAULT(bool, ThreadLocalHandshakes, false);
1851 }
1852 #endif
1853
1854 set_conservative_max_heap_alignment();
1855
1856 #ifndef ZERO
1857 #ifdef _LP64
1858 set_use_compressed_oops();
1859
1860 // set_use_compressed_klass_ptrs() must be called after calling
1861 // set_use_compressed_oops().
1862 set_use_compressed_klass_ptrs();
1863
1864 // Also checks that certain machines are slower with compressed oops
1865 // in vm_version initialization code.
1866 #endif // _LP64
1867 #endif // !ZERO
1868
1869 return JNI_OK;
1870 }
1871
1872 julong Arguments::limit_by_allocatable_memory(julong limit) {
1873 julong max_allocatable;
1874 julong result = limit;
1875 if (os::has_allocatable_memory_limit(&max_allocatable)) {
1876 result = MIN2(result, max_allocatable / MaxVirtMemFraction);
1877 }
1878 return result;
1879 }
1880
1881 // Use static initialization to get the default before parsing
1882 static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress;
1883
1884 void Arguments::set_heap_size() {
1885 julong phys_mem =
1886 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM)
1887 : (julong)MaxRAM;
1888
1889 // Convert deprecated flags
1890 if (FLAG_IS_DEFAULT(MaxRAMPercentage) &&
1891 !FLAG_IS_DEFAULT(MaxRAMFraction))
1892 MaxRAMPercentage = 100.0 / MaxRAMFraction;
1893
1894 if (FLAG_IS_DEFAULT(MinRAMPercentage) &&
1895 !FLAG_IS_DEFAULT(MinRAMFraction))
1896 MinRAMPercentage = 100.0 / MinRAMFraction;
1897
1898 if (FLAG_IS_DEFAULT(InitialRAMPercentage) &&
1899 !FLAG_IS_DEFAULT(InitialRAMFraction))
1900 InitialRAMPercentage = 100.0 / InitialRAMFraction;
1901
1902 // If the maximum heap size has not been set with -Xmx,
1903 // then set it as fraction of the size of physical memory,
1904 // respecting the maximum and minimum sizes of the heap.
1905 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
1906 julong reasonable_max = (julong)((phys_mem * MaxRAMPercentage) / 100);
1907 const julong reasonable_min = (julong)((phys_mem * MinRAMPercentage) / 100);
1908 if (reasonable_min < MaxHeapSize) {
1909 // Small physical memory, so use a minimum fraction of it for the heap
1910 reasonable_max = reasonable_min;
1911 } else {
1912 // Not-small physical memory, so require a heap at least
1913 // as large as MaxHeapSize
1914 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize);
1915 }
1916
1917 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) {
1918 // Limit the heap size to ErgoHeapSizeLimit
1919 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit);
1920 }
1921 if (UseCompressedOops) {
1922 // Limit the heap size to the maximum possible when using compressed oops
1923 julong max_coop_heap = (julong)max_heap_for_compressed_oops();
1924
1925 // HeapBaseMinAddress can be greater than default but not less than.
1926 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) {
1927 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) {
1928 // matches compressed oops printing flags
1929 log_debug(gc, heap, coops)("HeapBaseMinAddress must be at least " SIZE_FORMAT
1930 " (" SIZE_FORMAT "G) which is greater than value given " SIZE_FORMAT,
1931 DefaultHeapBaseMinAddress,
1932 DefaultHeapBaseMinAddress/G,
1933 HeapBaseMinAddress);
1934 FLAG_SET_ERGO(size_t, HeapBaseMinAddress, DefaultHeapBaseMinAddress);
1935 }
1936 }
1937
1938 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) {
1939 // Heap should be above HeapBaseMinAddress to get zero based compressed oops
1940 // but it should be not less than default MaxHeapSize.
1941 max_coop_heap -= HeapBaseMinAddress;
1942 }
1943 reasonable_max = MIN2(reasonable_max, max_coop_heap);
1944 }
1945 reasonable_max = limit_by_allocatable_memory(reasonable_max);
1946
1947 if (!FLAG_IS_DEFAULT(InitialHeapSize)) {
1948 // An initial heap size was specified on the command line,
1949 // so be sure that the maximum size is consistent. Done
1950 // after call to limit_by_allocatable_memory because that
1951 // method might reduce the allocation size.
1952 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize);
1953 }
1954
1955 log_trace(gc, heap)(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max);
1956 FLAG_SET_ERGO(size_t, MaxHeapSize, (size_t)reasonable_max);
1957 }
1958
1959 // If the minimum or initial heap_size have not been set or requested to be set
1960 // ergonomically, set them accordingly.
1961 if (InitialHeapSize == 0 || min_heap_size() == 0) {
1962 julong reasonable_minimum = (julong)(OldSize + NewSize);
1963
1964 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize);
1965
1966 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum);
1967
1968 if (InitialHeapSize == 0) {
1969 julong reasonable_initial = (julong)((phys_mem * InitialRAMPercentage) / 100);
1970
1971 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size());
1972 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize);
1973
1974 reasonable_initial = limit_by_allocatable_memory(reasonable_initial);
1975
1976 log_trace(gc, heap)(" Initial heap size " SIZE_FORMAT, (size_t)reasonable_initial);
1977 FLAG_SET_ERGO(size_t, InitialHeapSize, (size_t)reasonable_initial);
1978 }
1979 // If the minimum heap size has not been set (via -Xms),
1980 // synchronize with InitialHeapSize to avoid errors with the default value.
1981 if (min_heap_size() == 0) {
1982 set_min_heap_size(MIN2((size_t)reasonable_minimum, InitialHeapSize));
1983 log_trace(gc, heap)(" Minimum heap size " SIZE_FORMAT, min_heap_size());
1984 }
1985 }
1986 }
1987
1988 // This option inspects the machine and attempts to set various
1989 // parameters to be optimal for long-running, memory allocation
1990 // intensive jobs. It is intended for machines with large
1991 // amounts of cpu and memory.
1992 jint Arguments::set_aggressive_heap_flags() {
1993 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit
1994 // VM, but we may not be able to represent the total physical memory
1995 // available (like having 8gb of memory on a box but using a 32bit VM).
1996 // Thus, we need to make sure we're using a julong for intermediate
1997 // calculations.
1998 julong initHeapSize;
1999 julong total_memory = os::physical_memory();
2000
2001 if (total_memory < (julong) 256 * M) {
2002 jio_fprintf(defaultStream::error_stream(),
2003 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n");
2004 vm_exit(1);
2005 }
2006
2007 // The heap size is half of available memory, or (at most)
2008 // all of possible memory less 160mb (leaving room for the OS
2009 // when using ISM). This is the maximum; because adaptive sizing
2010 // is turned on below, the actual space used may be smaller.
2011
2012 initHeapSize = MIN2(total_memory / (julong) 2,
2013 total_memory - (julong) 160 * M);
2014
2015 initHeapSize = limit_by_allocatable_memory(initHeapSize);
2016
2017 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
2018 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, initHeapSize) != JVMFlag::SUCCESS) {
2019 return JNI_EINVAL;
2020 }
2021 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, initHeapSize) != JVMFlag::SUCCESS) {
2022 return JNI_EINVAL;
2023 }
2024 // Currently the minimum size and the initial heap sizes are the same.
2025 set_min_heap_size(initHeapSize);
2026 }
2027 if (FLAG_IS_DEFAULT(NewSize)) {
2028 // Make the young generation 3/8ths of the total heap.
2029 if (FLAG_SET_CMDLINE(size_t, NewSize,
2030 ((julong) MaxHeapSize / (julong) 8) * (julong) 3) != JVMFlag::SUCCESS) {
2031 return JNI_EINVAL;
2032 }
2033 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, NewSize) != JVMFlag::SUCCESS) {
2034 return JNI_EINVAL;
2035 }
2036 }
2037
2038 #if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
2039 FLAG_SET_DEFAULT(UseLargePages, true);
2040 #endif
2041
2042 // Increase some data structure sizes for efficiency
2043 if (FLAG_SET_CMDLINE(size_t, BaseFootPrintEstimate, MaxHeapSize) != JVMFlag::SUCCESS) {
2044 return JNI_EINVAL;
2045 }
2046 if (FLAG_SET_CMDLINE(bool, ResizeTLAB, false) != JVMFlag::SUCCESS) {
2047 return JNI_EINVAL;
2048 }
2049 if (FLAG_SET_CMDLINE(size_t, TLABSize, 256 * K) != JVMFlag::SUCCESS) {
2050 return JNI_EINVAL;
2051 }
2052
2053 // See the OldPLABSize comment below, but replace 'after promotion'
2054 // with 'after copying'. YoungPLABSize is the size of the survivor
2055 // space per-gc-thread buffers. The default is 4kw.
2056 if (FLAG_SET_CMDLINE(size_t, YoungPLABSize, 256 * K) != JVMFlag::SUCCESS) { // Note: this is in words
2057 return JNI_EINVAL;
2058 }
2059
2060 // OldPLABSize is the size of the buffers in the old gen that
2061 // UseParallelGC uses to promote live data that doesn't fit in the
2062 // survivor spaces. At any given time, there's one for each gc thread.
2063 // The default size is 1kw. These buffers are rarely used, since the
2064 // survivor spaces are usually big enough. For specjbb, however, there
2065 // are occasions when there's lots of live data in the young gen
2066 // and we end up promoting some of it. We don't have a definite
2067 // explanation for why bumping OldPLABSize helps, but the theory
2068 // is that a bigger PLAB results in retaining something like the
2069 // original allocation order after promotion, which improves mutator
2070 // locality. A minor effect may be that larger PLABs reduce the
2071 // number of PLAB allocation events during gc. The value of 8kw
2072 // was arrived at by experimenting with specjbb.
2073 if (FLAG_SET_CMDLINE(size_t, OldPLABSize, 8 * K) != JVMFlag::SUCCESS) { // Note: this is in words
2074 return JNI_EINVAL;
2075 }
2076
2077 // Enable parallel GC and adaptive generation sizing
2078 if (FLAG_SET_CMDLINE(bool, UseParallelGC, true) != JVMFlag::SUCCESS) {
2079 return JNI_EINVAL;
2080 }
2081
2082 // Encourage steady state memory management
2083 if (FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100) != JVMFlag::SUCCESS) {
2084 return JNI_EINVAL;
2085 }
2086
2087 // This appears to improve mutator locality
2088 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != JVMFlag::SUCCESS) {
2089 return JNI_EINVAL;
2090 }
2091
2092 // Get around early Solaris scheduling bug
2093 // (affinity vs other jobs on system)
2094 // but disallow DR and offlining (5008695).
2095 if (FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true) != JVMFlag::SUCCESS) {
2096 return JNI_EINVAL;
2097 }
2098
2099 return JNI_OK;
2100 }
2101
2102 // This must be called after ergonomics.
2103 void Arguments::set_bytecode_flags() {
2104 if (!RewriteBytecodes) {
2105 FLAG_SET_DEFAULT(RewriteFrequentPairs, false);
2106 }
2107 }
2108
2109 // Aggressive optimization flags -XX:+AggressiveOpts
2110 jint Arguments::set_aggressive_opts_flags() {
2111 #ifdef COMPILER2
2112 if (AggressiveUnboxing) {
2113 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
2114 FLAG_SET_DEFAULT(EliminateAutoBox, true);
2115 } else if (!EliminateAutoBox) {
2116 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled");
2117 AggressiveUnboxing = false;
2118 }
2119 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) {
2120 FLAG_SET_DEFAULT(DoEscapeAnalysis, true);
2121 } else if (!DoEscapeAnalysis) {
2122 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled");
2123 AggressiveUnboxing = false;
2124 }
2125 }
2126 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
2127 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
2128 FLAG_SET_DEFAULT(EliminateAutoBox, true);
2129 }
2130 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
2131 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000);
2132 }
2133
2134 // Feed the cache size setting into the JDK
2135 char buffer[1024];
2136 jio_snprintf(buffer, 1024, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax);
2137 if (!add_property(buffer)) {
2138 return JNI_ENOMEM;
2139 }
2140 }
2141 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) {
2142 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500);
2143 }
2144 #endif
2145
2146 if (AggressiveOpts) {
2147 // Sample flag setting code
2148 // if (FLAG_IS_DEFAULT(EliminateZeroing)) {
2149 // FLAG_SET_DEFAULT(EliminateZeroing, true);
2150 // }
2151 }
2152
2153 return JNI_OK;
2154 }
2155
2156 //===========================================================================================================
2157 // Parsing of java.compiler property
2158
2159 void Arguments::process_java_compiler_argument(const char* arg) {
2160 // For backwards compatibility, Djava.compiler=NONE or ""
2161 // causes us to switch to -Xint mode UNLESS -Xdebug
2162 // is also specified.
2163 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) {
2164 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen.
2165 }
2166 }
2167
2168 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) {
2169 _sun_java_launcher = os::strdup_check_oom(launcher);
2170 }
2171
2172 bool Arguments::created_by_java_launcher() {
2173 assert(_sun_java_launcher != NULL, "property must have value");
2174 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0;
2175 }
2176
2177 bool Arguments::sun_java_launcher_is_altjvm() {
2178 return _sun_java_launcher_is_altjvm;
2179 }
2180
2181 //===========================================================================================================
2182 // Parsing of main arguments
2183
2184 #if INCLUDE_JVMCI
2185 // Check consistency of jvmci vm argument settings.
2186 bool Arguments::check_jvmci_args_consistency() {
2187 return JVMCIGlobals::check_jvmci_flags_are_consistent();
2188 }
2189 #endif //INCLUDE_JVMCI
2190
2191 // Check the consistency of vm_init_args
2192 bool Arguments::check_vm_args_consistency() {
2193 // Method for adding checks for flag consistency.
2194 // The intent is to warn the user of all possible conflicts,
2195 // before returning an error.
2196 // Note: Needs platform-dependent factoring.
2197 bool status = true;
2198
2199 if (TLABRefillWasteFraction == 0) {
2200 jio_fprintf(defaultStream::error_stream(),
2201 "TLABRefillWasteFraction should be a denominator, "
2202 "not " SIZE_FORMAT "\n",
2203 TLABRefillWasteFraction);
2204 status = false;
2205 }
2206
2207 if (PrintNMTStatistics) {
2208 #if INCLUDE_NMT
2209 if (MemTracker::tracking_level() == NMT_off) {
2210 #endif // INCLUDE_NMT
2211 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled");
2212 PrintNMTStatistics = false;
2213 #if INCLUDE_NMT
2214 }
2215 #endif
2216 }
2217
2218 #if INCLUDE_JVMCI
2219 status = status && check_jvmci_args_consistency();
2220
2221 if (EnableJVMCI) {
2222 PropertyList_unique_add(&_system_properties, "jdk.internal.vm.ci.enabled", "true",
2223 AddProperty, UnwriteableProperty, InternalProperty);
2224
2225 if (!ScavengeRootsInCode) {
2226 warning("forcing ScavengeRootsInCode non-zero because JVMCI is enabled");
2227 ScavengeRootsInCode = 1;
2228 }
2229 }
2230 #endif
2231
2232 // Check lower bounds of the code cache
2233 // Template Interpreter code is approximately 3X larger in debug builds.
2234 uint min_code_cache_size = CodeCacheMinimumUseSpace DEBUG_ONLY(* 3);
2235 if (ReservedCodeCacheSize < InitialCodeCacheSize) {
2236 jio_fprintf(defaultStream::error_stream(),
2237 "Invalid ReservedCodeCacheSize: %dK. Must be at least InitialCodeCacheSize=%dK.\n",
2238 ReservedCodeCacheSize/K, InitialCodeCacheSize/K);
2239 status = false;
2240 } else if (ReservedCodeCacheSize < min_code_cache_size) {
2241 jio_fprintf(defaultStream::error_stream(),
2242 "Invalid ReservedCodeCacheSize=%dK. Must be at least %uK.\n", ReservedCodeCacheSize/K,
2243 min_code_cache_size/K);
2244 status = false;
2245 } else if (ReservedCodeCacheSize > CODE_CACHE_SIZE_LIMIT) {
2246 // Code cache size larger than CODE_CACHE_SIZE_LIMIT is not supported.
2247 jio_fprintf(defaultStream::error_stream(),
2248 "Invalid ReservedCodeCacheSize=%dM. Must be at most %uM.\n", ReservedCodeCacheSize/M,
2249 CODE_CACHE_SIZE_LIMIT/M);
2250 status = false;
2251 } else if (NonNMethodCodeHeapSize < min_code_cache_size) {
2252 jio_fprintf(defaultStream::error_stream(),
2253 "Invalid NonNMethodCodeHeapSize=%dK. Must be at least %uK.\n", NonNMethodCodeHeapSize/K,
2254 min_code_cache_size/K);
2255 status = false;
2256 }
2257
2258 #ifdef _LP64
2259 if (!FLAG_IS_DEFAULT(CICompilerCount) && !FLAG_IS_DEFAULT(CICompilerCountPerCPU) && CICompilerCountPerCPU) {
2260 warning("The VM option CICompilerCountPerCPU overrides CICompilerCount.");
2261 }
2262 #endif
2263
2264 #ifndef SUPPORT_RESERVED_STACK_AREA
2265 if (StackReservedPages != 0) {
2266 FLAG_SET_CMDLINE(intx, StackReservedPages, 0);
2267 warning("Reserved Stack Area not supported on this platform");
2268 }
2269 #endif
2270
2271 if (BackgroundCompilation && (CompileTheWorld || ReplayCompiles)) {
2272 if (!FLAG_IS_DEFAULT(BackgroundCompilation)) {
2273 warning("BackgroundCompilation disabled due to CompileTheWorld or ReplayCompiles options.");
2274 }
2275 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false);
2276 }
2277 if (UseCompiler && is_interpreter_only()) {
2278 if (!FLAG_IS_DEFAULT(UseCompiler)) {
2279 warning("UseCompiler disabled due to -Xint.");
2280 }
2281 FLAG_SET_CMDLINE(bool, UseCompiler, false);
2282 }
2283 #ifdef COMPILER2
2284 if (PostLoopMultiversioning && !RangeCheckElimination) {
2285 if (!FLAG_IS_DEFAULT(PostLoopMultiversioning)) {
2286 warning("PostLoopMultiversioning disabled because RangeCheckElimination is disabled.");
2287 }
2288 FLAG_SET_CMDLINE(bool, PostLoopMultiversioning, false);
2289 }
2290 if (UseCountedLoopSafepoints && LoopStripMiningIter == 0) {
2291 if (!FLAG_IS_DEFAULT(UseCountedLoopSafepoints) || !FLAG_IS_DEFAULT(LoopStripMiningIter)) {
2292 warning("When counted loop safepoints are enabled, LoopStripMiningIter must be at least 1 (a safepoint every 1 iteration): setting it to 1");
2293 }
2294 LoopStripMiningIter = 1;
2295 } else if (!UseCountedLoopSafepoints && LoopStripMiningIter > 0) {
2296 if (!FLAG_IS_DEFAULT(UseCountedLoopSafepoints) || !FLAG_IS_DEFAULT(LoopStripMiningIter)) {
2297 warning("Disabling counted safepoints implies no loop strip mining: setting LoopStripMiningIter to 0");
2298 }
2299 LoopStripMiningIter = 0;
2300 }
2301 #endif
2302 if (!FLAG_IS_DEFAULT(AllocateHeapAt)) {
2303 if ((UseNUMAInterleaving && !FLAG_IS_DEFAULT(UseNUMAInterleaving)) || (UseNUMA && !FLAG_IS_DEFAULT(UseNUMA))) {
2304 log_warning(arguments) ("NUMA support for Heap depends on the file system when AllocateHeapAt option is used.\n");
2305 }
2306 }
2307 return status;
2308 }
2309
2310 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore,
2311 const char* option_type) {
2312 if (ignore) return false;
2313
2314 const char* spacer = " ";
2315 if (option_type == NULL) {
2316 option_type = ++spacer; // Set both to the empty string.
2317 }
2318
2319 if (os::obsolete_option(option)) {
2320 jio_fprintf(defaultStream::error_stream(),
2321 "Obsolete %s%soption: %s\n", option_type, spacer,
2322 option->optionString);
2323 return false;
2324 } else {
2325 jio_fprintf(defaultStream::error_stream(),
2326 "Unrecognized %s%soption: %s\n", option_type, spacer,
2327 option->optionString);
2328 return true;
2329 }
2330 }
2331
2332 static const char* user_assertion_options[] = {
2333 "-da", "-ea", "-disableassertions", "-enableassertions", 0
2334 };
2335
2336 static const char* system_assertion_options[] = {
2337 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0
2338 };
2339
2340 bool Arguments::parse_uintx(const char* value,
2341 uintx* uintx_arg,
2342 uintx min_size) {
2343
2344 // Check the sign first since atojulong() parses only unsigned values.
2345 bool value_is_positive = !(*value == '-');
2346
2347 if (value_is_positive) {
2348 julong n;
2349 bool good_return = atojulong(value, &n);
2350 if (good_return) {
2351 bool above_minimum = n >= min_size;
2352 bool value_is_too_large = n > max_uintx;
2353
2354 if (above_minimum && !value_is_too_large) {
2355 *uintx_arg = n;
2356 return true;
2357 }
2358 }
2359 }
2360 return false;
2361 }
2362
2363 unsigned int addreads_count = 0;
2364 unsigned int addexports_count = 0;
2365 unsigned int addopens_count = 0;
2366 unsigned int addmods_count = 0;
2367 unsigned int patch_mod_count = 0;
2368
2369 bool Arguments::create_property(const char* prop_name, const char* prop_value, PropertyInternal internal) {
2370 size_t prop_len = strlen(prop_name) + strlen(prop_value) + 2;
2371 char* property = AllocateHeap(prop_len, mtArguments);
2372 int ret = jio_snprintf(property, prop_len, "%s=%s", prop_name, prop_value);
2373 if (ret < 0 || ret >= (int)prop_len) {
2374 FreeHeap(property);
2375 return false;
2376 }
2377 bool added = add_property(property, UnwriteableProperty, internal);
2378 FreeHeap(property);
2379 return added;
2380 }
2381
2382 bool Arguments::create_numbered_property(const char* prop_base_name, const char* prop_value, unsigned int count) {
2383 const unsigned int props_count_limit = 1000;
2384 const int max_digits = 3;
2385 const int extra_symbols_count = 3; // includes '.', '=', '\0'
2386
2387 // Make sure count is < props_count_limit. Otherwise, memory allocation will be too small.
2388 if (count < props_count_limit) {
2389 size_t prop_len = strlen(prop_base_name) + strlen(prop_value) + max_digits + extra_symbols_count;
2390 char* property = AllocateHeap(prop_len, mtArguments);
2391 int ret = jio_snprintf(property, prop_len, "%s.%d=%s", prop_base_name, count, prop_value);
2392 if (ret < 0 || ret >= (int)prop_len) {
2393 FreeHeap(property);
2394 jio_fprintf(defaultStream::error_stream(), "Failed to create property %s.%d=%s\n", prop_base_name, count, prop_value);
2395 return false;
2396 }
2397 bool added = add_property(property, UnwriteableProperty, InternalProperty);
2398 FreeHeap(property);
2399 return added;
2400 }
2401
2402 jio_fprintf(defaultStream::error_stream(), "Property count limit exceeded: %s, limit=%d\n", prop_base_name, props_count_limit);
2403 return false;
2404 }
2405
2406 Arguments::ArgsRange Arguments::parse_memory_size(const char* s,
2407 julong* long_arg,
2408 julong min_size,
2409 julong max_size) {
2410 if (!atojulong(s, long_arg)) return arg_unreadable;
2411 return check_memory_size(*long_arg, min_size, max_size);
2412 }
2413
2414 // Parse JavaVMInitArgs structure
2415
2416 jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args,
2417 const JavaVMInitArgs *java_options_args,
2418 const JavaVMInitArgs *cmd_line_args) {
2419 bool patch_mod_javabase = false;
2420
2421 // Save default settings for some mode flags
2422 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
2423 Arguments::_UseOnStackReplacement = UseOnStackReplacement;
2424 Arguments::_ClipInlining = ClipInlining;
2425 Arguments::_BackgroundCompilation = BackgroundCompilation;
2426 if (TieredCompilation) {
2427 Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
2428 Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
2429 }
2430
2431 // Setup flags for mixed which is the default
2432 set_mode_flags(_mixed);
2433
2434 // Parse args structure generated from JAVA_TOOL_OPTIONS environment
2435 // variable (if present).
2436 jint result = parse_each_vm_init_arg(java_tool_options_args, &patch_mod_javabase, JVMFlag::ENVIRON_VAR);
2437 if (result != JNI_OK) {
2438 return result;
2439 }
2440
2441 // Parse args structure generated from the command line flags.
2442 result = parse_each_vm_init_arg(cmd_line_args, &patch_mod_javabase, JVMFlag::COMMAND_LINE);
2443 if (result != JNI_OK) {
2444 return result;
2445 }
2446
2447 // Parse args structure generated from the _JAVA_OPTIONS environment
2448 // variable (if present) (mimics classic VM)
2449 result = parse_each_vm_init_arg(java_options_args, &patch_mod_javabase, JVMFlag::ENVIRON_VAR);
2450 if (result != JNI_OK) {
2451 return result;
2452 }
2453
2454 // We need to ensure processor and memory resources have been properly
2455 // configured - which may rely on arguments we just processed - before
2456 // doing the final argument processing. Any argument processing that
2457 // needs to know about processor and memory resources must occur after
2458 // this point.
2459
2460 os::init_container_support();
2461
2462 // Do final processing now that all arguments have been parsed
2463 result = finalize_vm_init_args(patch_mod_javabase);
2464 if (result != JNI_OK) {
2465 return result;
2466 }
2467
2468 return JNI_OK;
2469 }
2470
2471 // Checks if name in command-line argument -agent{lib,path}:name[=options]
2472 // represents a valid JDWP agent. is_path==true denotes that we
2473 // are dealing with -agentpath (case where name is a path), otherwise with
2474 // -agentlib
2475 bool valid_jdwp_agent(char *name, bool is_path) {
2476 char *_name;
2477 const char *_jdwp = "jdwp";
2478 size_t _len_jdwp, _len_prefix;
2479
2480 if (is_path) {
2481 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) {
2482 return false;
2483 }
2484
2485 _name++; // skip past last path separator
2486 _len_prefix = strlen(JNI_LIB_PREFIX);
2487
2488 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) {
2489 return false;
2490 }
2491
2492 _name += _len_prefix;
2493 _len_jdwp = strlen(_jdwp);
2494
2495 if (strncmp(_name, _jdwp, _len_jdwp) == 0) {
2496 _name += _len_jdwp;
2497 }
2498 else {
2499 return false;
2500 }
2501
2502 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) {
2503 return false;
2504 }
2505
2506 return true;
2507 }
2508
2509 if (strcmp(name, _jdwp) == 0) {
2510 return true;
2511 }
2512
2513 return false;
2514 }
2515
2516 int Arguments::process_patch_mod_option(const char* patch_mod_tail, bool* patch_mod_javabase) {
2517 // --patch-module=<module>=<file>(<pathsep><file>)*
2518 assert(patch_mod_tail != NULL, "Unexpected NULL patch-module value");
2519 // Find the equal sign between the module name and the path specification
2520 const char* module_equal = strchr(patch_mod_tail, '=');
2521 if (module_equal == NULL) {
2522 jio_fprintf(defaultStream::output_stream(), "Missing '=' in --patch-module specification\n");
2523 return JNI_ERR;
2524 } else {
2525 // Pick out the module name
2526 size_t module_len = module_equal - patch_mod_tail;
2527 char* module_name = NEW_C_HEAP_ARRAY_RETURN_NULL(char, module_len+1, mtArguments);
2528 if (module_name != NULL) {
2529 memcpy(module_name, patch_mod_tail, module_len);
2530 *(module_name + module_len) = '\0';
2531 // The path piece begins one past the module_equal sign
2532 add_patch_mod_prefix(module_name, module_equal + 1, patch_mod_javabase);
2533 FREE_C_HEAP_ARRAY(char, module_name);
2534 if (!create_numbered_property("jdk.module.patch", patch_mod_tail, patch_mod_count++)) {
2535 return JNI_ENOMEM;
2536 }
2537 } else {
2538 return JNI_ENOMEM;
2539 }
2540 }
2541 return JNI_OK;
2542 }
2543
2544 // Parse -Xss memory string parameter and convert to ThreadStackSize in K.
2545 jint Arguments::parse_xss(const JavaVMOption* option, const char* tail, intx* out_ThreadStackSize) {
2546 // The min and max sizes match the values in globals.hpp, but scaled
2547 // with K. The values have been chosen so that alignment with page
2548 // size doesn't change the max value, which makes the conversions
2549 // back and forth between Xss value and ThreadStackSize value easier.
2550 // The values have also been chosen to fit inside a 32-bit signed type.
2551 const julong min_ThreadStackSize = 0;
2552 const julong max_ThreadStackSize = 1 * M;
2553
2554 const julong min_size = min_ThreadStackSize * K;
2555 const julong max_size = max_ThreadStackSize * K;
2556
2557 assert(is_aligned(max_size, os::vm_page_size()), "Implementation assumption");
2558
2559 julong size = 0;
2560 ArgsRange errcode = parse_memory_size(tail, &size, min_size, max_size);
2561 if (errcode != arg_in_range) {
2562 bool silent = (option == NULL); // Allow testing to silence error messages
2563 if (!silent) {
2564 jio_fprintf(defaultStream::error_stream(),
2565 "Invalid thread stack size: %s\n", option->optionString);
2566 describe_range_error(errcode);
2567 }
2568 return JNI_EINVAL;
2569 }
2570
2571 // Internally track ThreadStackSize in units of 1024 bytes.
2572 const julong size_aligned = align_up(size, K);
2573 assert(size <= size_aligned,
2574 "Overflow: " JULONG_FORMAT " " JULONG_FORMAT,
2575 size, size_aligned);
2576
2577 const julong size_in_K = size_aligned / K;
2578 assert(size_in_K < (julong)max_intx,
2579 "size_in_K doesn't fit in the type of ThreadStackSize: " JULONG_FORMAT,
2580 size_in_K);
2581
2582 // Check that code expanding ThreadStackSize to a page aligned number of bytes won't overflow.
2583 const julong max_expanded = align_up(size_in_K * K, os::vm_page_size());
2584 assert(max_expanded < max_uintx && max_expanded >= size_in_K,
2585 "Expansion overflowed: " JULONG_FORMAT " " JULONG_FORMAT,
2586 max_expanded, size_in_K);
2587
2588 *out_ThreadStackSize = (intx)size_in_K;
2589
2590 return JNI_OK;
2591 }
2592
2593 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, bool* patch_mod_javabase, JVMFlag::Flags origin) {
2594 // For match_option to return remaining or value part of option string
2595 const char* tail;
2596
2597 // iterate over arguments
2598 for (int index = 0; index < args->nOptions; index++) {
2599 bool is_absolute_path = false; // for -agentpath vs -agentlib
2600
2601 const JavaVMOption* option = args->options + index;
2602
2603 if (!match_option(option, "-Djava.class.path", &tail) &&
2604 !match_option(option, "-Dsun.java.command", &tail) &&
2605 !match_option(option, "-Dsun.java.launcher", &tail)) {
2606
2607 // add all jvm options to the jvm_args string. This string
2608 // is used later to set the java.vm.args PerfData string constant.
2609 // the -Djava.class.path and the -Dsun.java.command options are
2610 // omitted from jvm_args string as each have their own PerfData
2611 // string constant object.
2612 build_jvm_args(option->optionString);
2613 }
2614
2615 // -verbose:[class/module/gc/jni]
2616 if (match_option(option, "-verbose", &tail)) {
2617 if (!strcmp(tail, ":class") || !strcmp(tail, "")) {
2618 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, load));
2619 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, unload));
2620 } else if (!strcmp(tail, ":module")) {
2621 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, load));
2622 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, unload));
2623 } else if (!strcmp(tail, ":gc")) {
2624 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
2625 } else if (!strcmp(tail, ":jni")) {
2626 if (FLAG_SET_CMDLINE(bool, PrintJNIResolving, true) != JVMFlag::SUCCESS) {
2627 return JNI_EINVAL;
2628 }
2629 }
2630 // -da / -ea / -disableassertions / -enableassertions
2631 // These accept an optional class/package name separated by a colon, e.g.,
2632 // -da:java.lang.Thread.
2633 } else if (match_option(option, user_assertion_options, &tail, true)) {
2634 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2635 if (*tail == '\0') {
2636 JavaAssertions::setUserClassDefault(enable);
2637 } else {
2638 assert(*tail == ':', "bogus match by match_option()");
2639 JavaAssertions::addOption(tail + 1, enable);
2640 }
2641 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions
2642 } else if (match_option(option, system_assertion_options, &tail, false)) {
2643 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2644 JavaAssertions::setSystemClassDefault(enable);
2645 // -bootclasspath:
2646 } else if (match_option(option, "-Xbootclasspath:", &tail)) {
2647 jio_fprintf(defaultStream::output_stream(),
2648 "-Xbootclasspath is no longer a supported option.\n");
2649 return JNI_EINVAL;
2650 // -bootclasspath/a:
2651 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) {
2652 Arguments::append_sysclasspath(tail);
2653 // -bootclasspath/p:
2654 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) {
2655 jio_fprintf(defaultStream::output_stream(),
2656 "-Xbootclasspath/p is no longer a supported option.\n");
2657 return JNI_EINVAL;
2658 // -Xrun
2659 } else if (match_option(option, "-Xrun", &tail)) {
2660 if (tail != NULL) {
2661 const char* pos = strchr(tail, ':');
2662 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2663 char* name = NEW_C_HEAP_ARRAY(char, len + 1, mtArguments);
2664 jio_snprintf(name, len + 1, "%s", tail);
2665
2666 char *options = NULL;
2667 if(pos != NULL) {
2668 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied.
2669 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtArguments), pos+1, len2);
2670 }
2671 #if !INCLUDE_JVMTI
2672 if (strcmp(name, "jdwp") == 0) {
2673 jio_fprintf(defaultStream::error_stream(),
2674 "Debugging agents are not supported in this VM\n");
2675 return JNI_ERR;
2676 }
2677 #endif // !INCLUDE_JVMTI
2678 add_init_library(name, options);
2679 }
2680 } else if (match_option(option, "--add-reads=", &tail)) {
2681 if (!create_numbered_property("jdk.module.addreads", tail, addreads_count++)) {
2682 return JNI_ENOMEM;
2683 }
2684 } else if (match_option(option, "--add-exports=", &tail)) {
2685 if (!create_numbered_property("jdk.module.addexports", tail, addexports_count++)) {
2686 return JNI_ENOMEM;
2687 }
2688 } else if (match_option(option, "--add-opens=", &tail)) {
2689 if (!create_numbered_property("jdk.module.addopens", tail, addopens_count++)) {
2690 return JNI_ENOMEM;
2691 }
2692 } else if (match_option(option, "--add-modules=", &tail)) {
2693 if (!create_numbered_property("jdk.module.addmods", tail, addmods_count++)) {
2694 return JNI_ENOMEM;
2695 }
2696 } else if (match_option(option, "--limit-modules=", &tail)) {
2697 if (!create_property("jdk.module.limitmods", tail, InternalProperty)) {
2698 return JNI_ENOMEM;
2699 }
2700 } else if (match_option(option, "--module-path=", &tail)) {
2701 if (!create_property("jdk.module.path", tail, ExternalProperty)) {
2702 return JNI_ENOMEM;
2703 }
2704 } else if (match_option(option, "--upgrade-module-path=", &tail)) {
2705 if (!create_property("jdk.module.upgrade.path", tail, ExternalProperty)) {
2706 return JNI_ENOMEM;
2707 }
2708 } else if (match_option(option, "--patch-module=", &tail)) {
2709 // --patch-module=<module>=<file>(<pathsep><file>)*
2710 int res = process_patch_mod_option(tail, patch_mod_javabase);
2711 if (res != JNI_OK) {
2712 return res;
2713 }
2714 } else if (match_option(option, "--illegal-access=", &tail)) {
2715 if (!create_property("jdk.module.illegalAccess", tail, ExternalProperty)) {
2716 return JNI_ENOMEM;
2717 }
2718 // -agentlib and -agentpath
2719 } else if (match_option(option, "-agentlib:", &tail) ||
2720 (is_absolute_path = match_option(option, "-agentpath:", &tail))) {
2721 if(tail != NULL) {
2722 const char* pos = strchr(tail, '=');
2723 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2724 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtArguments), tail, len);
2725 name[len] = '\0';
2726
2727 char *options = NULL;
2728 if(pos != NULL) {
2729 options = os::strdup_check_oom(pos + 1, mtArguments);
2730 }
2731 #if !INCLUDE_JVMTI
2732 if (valid_jdwp_agent(name, is_absolute_path)) {
2733 jio_fprintf(defaultStream::error_stream(),
2734 "Debugging agents are not supported in this VM\n");
2735 return JNI_ERR;
2736 }
2737 #endif // !INCLUDE_JVMTI
2738 add_init_agent(name, options, is_absolute_path);
2739 }
2740 // -javaagent
2741 } else if (match_option(option, "-javaagent:", &tail)) {
2742 #if !INCLUDE_JVMTI
2743 jio_fprintf(defaultStream::error_stream(),
2744 "Instrumentation agents are not supported in this VM\n");
2745 return JNI_ERR;
2746 #else
2747 if (tail != NULL) {
2748 size_t length = strlen(tail) + 1;
2749 char *options = NEW_C_HEAP_ARRAY(char, length, mtArguments);
2750 jio_snprintf(options, length, "%s", tail);
2751 add_instrument_agent("instrument", options, false);
2752 // java agents need module java.instrument
2753 if (!create_numbered_property("jdk.module.addmods", "java.instrument", addmods_count++)) {
2754 return JNI_ENOMEM;
2755 }
2756 }
2757 #endif // !INCLUDE_JVMTI
2758 // --enable_preview
2759 } else if (match_option(option, "--enable-preview")) {
2760 set_enable_preview();
2761 // -Xnoclassgc
2762 } else if (match_option(option, "-Xnoclassgc")) {
2763 if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != JVMFlag::SUCCESS) {
2764 return JNI_EINVAL;
2765 }
2766 // -Xconcgc
2767 } else if (match_option(option, "-Xconcgc")) {
2768 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true) != JVMFlag::SUCCESS) {
2769 return JNI_EINVAL;
2770 }
2771 handle_extra_cms_flags("-Xconcgc uses UseConcMarkSweepGC");
2772 // -Xnoconcgc
2773 } else if (match_option(option, "-Xnoconcgc")) {
2774 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false) != JVMFlag::SUCCESS) {
2775 return JNI_EINVAL;
2776 }
2777 handle_extra_cms_flags("-Xnoconcgc uses UseConcMarkSweepGC");
2778 // -Xbatch
2779 } else if (match_option(option, "-Xbatch")) {
2780 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != JVMFlag::SUCCESS) {
2781 return JNI_EINVAL;
2782 }
2783 // -Xmn for compatibility with other JVM vendors
2784 } else if (match_option(option, "-Xmn", &tail)) {
2785 julong long_initial_young_size = 0;
2786 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1);
2787 if (errcode != arg_in_range) {
2788 jio_fprintf(defaultStream::error_stream(),
2789 "Invalid initial young generation size: %s\n", option->optionString);
2790 describe_range_error(errcode);
2791 return JNI_EINVAL;
2792 }
2793 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, (size_t)long_initial_young_size) != JVMFlag::SUCCESS) {
2794 return JNI_EINVAL;
2795 }
2796 if (FLAG_SET_CMDLINE(size_t, NewSize, (size_t)long_initial_young_size) != JVMFlag::SUCCESS) {
2797 return JNI_EINVAL;
2798 }
2799 // -Xms
2800 } else if (match_option(option, "-Xms", &tail)) {
2801 julong long_initial_heap_size = 0;
2802 // an initial heap size of 0 means automatically determine
2803 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0);
2804 if (errcode != arg_in_range) {
2805 jio_fprintf(defaultStream::error_stream(),
2806 "Invalid initial heap size: %s\n", option->optionString);
2807 describe_range_error(errcode);
2808 return JNI_EINVAL;
2809 }
2810 set_min_heap_size((size_t)long_initial_heap_size);
2811 // Currently the minimum size and the initial heap sizes are the same.
2812 // Can be overridden with -XX:InitialHeapSize.
2813 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, (size_t)long_initial_heap_size) != JVMFlag::SUCCESS) {
2814 return JNI_EINVAL;
2815 }
2816 // -Xmx
2817 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) {
2818 julong long_max_heap_size = 0;
2819 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1);
2820 if (errcode != arg_in_range) {
2821 jio_fprintf(defaultStream::error_stream(),
2822 "Invalid maximum heap size: %s\n", option->optionString);
2823 describe_range_error(errcode);
2824 return JNI_EINVAL;
2825 }
2826 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, (size_t)long_max_heap_size) != JVMFlag::SUCCESS) {
2827 return JNI_EINVAL;
2828 }
2829 // Xmaxf
2830 } else if (match_option(option, "-Xmaxf", &tail)) {
2831 char* err;
2832 int maxf = (int)(strtod(tail, &err) * 100);
2833 if (*err != '\0' || *tail == '\0') {
2834 jio_fprintf(defaultStream::error_stream(),
2835 "Bad max heap free percentage size: %s\n",
2836 option->optionString);
2837 return JNI_EINVAL;
2838 } else {
2839 if (FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf) != JVMFlag::SUCCESS) {
2840 return JNI_EINVAL;
2841 }
2842 }
2843 // Xminf
2844 } else if (match_option(option, "-Xminf", &tail)) {
2845 char* err;
2846 int minf = (int)(strtod(tail, &err) * 100);
2847 if (*err != '\0' || *tail == '\0') {
2848 jio_fprintf(defaultStream::error_stream(),
2849 "Bad min heap free percentage size: %s\n",
2850 option->optionString);
2851 return JNI_EINVAL;
2852 } else {
2853 if (FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf) != JVMFlag::SUCCESS) {
2854 return JNI_EINVAL;
2855 }
2856 }
2857 // -Xss
2858 } else if (match_option(option, "-Xss", &tail)) {
2859 intx value = 0;
2860 jint err = parse_xss(option, tail, &value);
2861 if (err != JNI_OK) {
2862 return err;
2863 }
2864 if (FLAG_SET_CMDLINE(intx, ThreadStackSize, value) != JVMFlag::SUCCESS) {
2865 return JNI_EINVAL;
2866 }
2867 } else if (match_option(option, "-Xmaxjitcodesize", &tail) ||
2868 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) {
2869 julong long_ReservedCodeCacheSize = 0;
2870
2871 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1);
2872 if (errcode != arg_in_range) {
2873 jio_fprintf(defaultStream::error_stream(),
2874 "Invalid maximum code cache size: %s.\n", option->optionString);
2875 return JNI_EINVAL;
2876 }
2877 if (FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != JVMFlag::SUCCESS) {
2878 return JNI_EINVAL;
2879 }
2880 // -green
2881 } else if (match_option(option, "-green")) {
2882 jio_fprintf(defaultStream::error_stream(),
2883 "Green threads support not available\n");
2884 return JNI_EINVAL;
2885 // -native
2886 } else if (match_option(option, "-native")) {
2887 // HotSpot always uses native threads, ignore silently for compatibility
2888 // -Xrs
2889 } else if (match_option(option, "-Xrs")) {
2890 // Classic/EVM option, new functionality
2891 if (FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true) != JVMFlag::SUCCESS) {
2892 return JNI_EINVAL;
2893 }
2894 // -Xprof
2895 } else if (match_option(option, "-Xprof")) {
2896 char version[256];
2897 // Obsolete in JDK 10
2898 JDK_Version::jdk(10).to_string(version, sizeof(version));
2899 warning("Ignoring option %s; support was removed in %s", option->optionString, version);
2900 // -Xconcurrentio
2901 } else if (match_option(option, "-Xconcurrentio")) {
2902 if (FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true) != JVMFlag::SUCCESS) {
2903 return JNI_EINVAL;
2904 }
2905 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != JVMFlag::SUCCESS) {
2906 return JNI_EINVAL;
2907 }
2908 SafepointSynchronize::set_defer_thr_suspend_loop_count();
2909 if (FLAG_SET_CMDLINE(bool, UseTLAB, false) != JVMFlag::SUCCESS) {
2910 return JNI_EINVAL;
2911 }
2912 if (FLAG_SET_CMDLINE(size_t, NewSizeThreadIncrease, 16 * K) != JVMFlag::SUCCESS) { // 20Kb per thread added to new generation
2913 return JNI_EINVAL;
2914 }
2915
2916 // -Xinternalversion
2917 } else if (match_option(option, "-Xinternalversion")) {
2918 jio_fprintf(defaultStream::output_stream(), "%s\n",
2919 VM_Version::internal_vm_info_string());
2920 vm_exit(0);
2921 #ifndef PRODUCT
2922 // -Xprintflags
2923 } else if (match_option(option, "-Xprintflags")) {
2924 JVMFlag::printFlags(tty, false);
2925 vm_exit(0);
2926 #endif
2927 // -D
2928 } else if (match_option(option, "-D", &tail)) {
2929 const char* value;
2930 if (match_option(option, "-Djava.endorsed.dirs=", &value) &&
2931 *value!= '\0' && strcmp(value, "\"\"") != 0) {
2932 // abort if -Djava.endorsed.dirs is set
2933 jio_fprintf(defaultStream::output_stream(),
2934 "-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n"
2935 "in modular form will be supported via the concept of upgradeable modules.\n", value);
2936 return JNI_EINVAL;
2937 }
2938 if (match_option(option, "-Djava.ext.dirs=", &value) &&
2939 *value != '\0' && strcmp(value, "\"\"") != 0) {
2940 // abort if -Djava.ext.dirs is set
2941 jio_fprintf(defaultStream::output_stream(),
2942 "-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value);
2943 return JNI_EINVAL;
2944 }
2945 // Check for module related properties. They must be set using the modules
2946 // options. For example: use "--add-modules=java.sql", not
2947 // "-Djdk.module.addmods=java.sql"
2948 if (is_internal_module_property(option->optionString + 2)) {
2949 needs_module_property_warning = true;
2950 continue;
2951 }
2952
2953 if (!add_property(tail)) {
2954 return JNI_ENOMEM;
2955 }
2956 // Out of the box management support
2957 if (match_option(option, "-Dcom.sun.management", &tail)) {
2958 #if INCLUDE_MANAGEMENT
2959 if (FLAG_SET_CMDLINE(bool, ManagementServer, true) != JVMFlag::SUCCESS) {
2960 return JNI_EINVAL;
2961 }
2962 // management agent in module jdk.management.agent
2963 if (!create_numbered_property("jdk.module.addmods", "jdk.management.agent", addmods_count++)) {
2964 return JNI_ENOMEM;
2965 }
2966 #else
2967 jio_fprintf(defaultStream::output_stream(),
2968 "-Dcom.sun.management is not supported in this VM.\n");
2969 return JNI_ERR;
2970 #endif
2971 }
2972 // -Xint
2973 } else if (match_option(option, "-Xint")) {
2974 set_mode_flags(_int);
2975 // -Xmixed
2976 } else if (match_option(option, "-Xmixed")) {
2977 set_mode_flags(_mixed);
2978 // -Xcomp
2979 } else if (match_option(option, "-Xcomp")) {
2980 // for testing the compiler; turn off all flags that inhibit compilation
2981 set_mode_flags(_comp);
2982 // -Xshare:dump
2983 } else if (match_option(option, "-Xshare:dump")) {
2984 if (FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true) != JVMFlag::SUCCESS) {
2985 return JNI_EINVAL;
2986 }
2987 set_mode_flags(_int); // Prevent compilation, which creates objects
2988 // -Xshare:on
2989 } else if (match_option(option, "-Xshare:on")) {
2990 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != JVMFlag::SUCCESS) {
2991 return JNI_EINVAL;
2992 }
2993 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != JVMFlag::SUCCESS) {
2994 return JNI_EINVAL;
2995 }
2996 // -Xshare:auto
2997 } else if (match_option(option, "-Xshare:auto")) {
2998 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != JVMFlag::SUCCESS) {
2999 return JNI_EINVAL;
3000 }
3001 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != JVMFlag::SUCCESS) {
3002 return JNI_EINVAL;
3003 }
3004 // -Xshare:off
3005 } else if (match_option(option, "-Xshare:off")) {
3006 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, false) != JVMFlag::SUCCESS) {
3007 return JNI_EINVAL;
3008 }
3009 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != JVMFlag::SUCCESS) {
3010 return JNI_EINVAL;
3011 }
3012 // -Xverify
3013 } else if (match_option(option, "-Xverify", &tail)) {
3014 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) {
3015 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true) != JVMFlag::SUCCESS) {
3016 return JNI_EINVAL;
3017 }
3018 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != JVMFlag::SUCCESS) {
3019 return JNI_EINVAL;
3020 }
3021 } else if (strcmp(tail, ":remote") == 0) {
3022 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != JVMFlag::SUCCESS) {
3023 return JNI_EINVAL;
3024 }
3025 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != JVMFlag::SUCCESS) {
3026 return JNI_EINVAL;
3027 }
3028 } else if (strcmp(tail, ":none") == 0) {
3029 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != JVMFlag::SUCCESS) {
3030 return JNI_EINVAL;
3031 }
3032 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false) != JVMFlag::SUCCESS) {
3033 return JNI_EINVAL;
3034 }
3035 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) {
3036 return JNI_EINVAL;
3037 }
3038 // -Xdebug
3039 } else if (match_option(option, "-Xdebug")) {
3040 // note this flag has been used, then ignore
3041 set_xdebug_mode(true);
3042 // -Xnoagent
3043 } else if (match_option(option, "-Xnoagent")) {
3044 // For compatibility with classic. HotSpot refuses to load the old style agent.dll.
3045 } else if (match_option(option, "-Xloggc:", &tail)) {
3046 // Deprecated flag to redirect GC output to a file. -Xloggc:<filename>
3047 log_warning(gc)("-Xloggc is deprecated. Will use -Xlog:gc:%s instead.", tail);
3048 _gc_log_filename = os::strdup_check_oom(tail);
3049 } else if (match_option(option, "-Xlog", &tail)) {
3050 bool ret = false;
3051 if (strcmp(tail, ":help") == 0) {
3052 fileStream stream(defaultStream::output_stream());
3053 LogConfiguration::print_command_line_help(&stream);
3054 vm_exit(0);
3055 } else if (strcmp(tail, ":disable") == 0) {
3056 LogConfiguration::disable_logging();
3057 ret = true;
3058 } else if (*tail == '\0') {
3059 ret = LogConfiguration::parse_command_line_arguments();
3060 assert(ret, "-Xlog without arguments should never fail to parse");
3061 } else if (*tail == ':') {
3062 ret = LogConfiguration::parse_command_line_arguments(tail + 1);
3063 }
3064 if (ret == false) {
3065 jio_fprintf(defaultStream::error_stream(),
3066 "Invalid -Xlog option '-Xlog%s', see error log for details.\n",
3067 tail);
3068 return JNI_EINVAL;
3069 }
3070 // JNI hooks
3071 } else if (match_option(option, "-Xcheck", &tail)) {
3072 if (!strcmp(tail, ":jni")) {
3073 #if !INCLUDE_JNI_CHECK
3074 warning("JNI CHECKING is not supported in this VM");
3075 #else
3076 CheckJNICalls = true;
3077 #endif // INCLUDE_JNI_CHECK
3078 } else if (is_bad_option(option, args->ignoreUnrecognized,
3079 "check")) {
3080 return JNI_EINVAL;
3081 }
3082 } else if (match_option(option, "vfprintf")) {
3083 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo);
3084 } else if (match_option(option, "exit")) {
3085 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo);
3086 } else if (match_option(option, "abort")) {
3087 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo);
3088 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure;
3089 // and the last option wins.
3090 } else if (match_option(option, "-XX:+NeverTenure")) {
3091 if (FLAG_SET_CMDLINE(bool, NeverTenure, true) != JVMFlag::SUCCESS) {
3092 return JNI_EINVAL;
3093 }
3094 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != JVMFlag::SUCCESS) {
3095 return JNI_EINVAL;
3096 }
3097 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1) != JVMFlag::SUCCESS) {
3098 return JNI_EINVAL;
3099 }
3100 } else if (match_option(option, "-XX:+AlwaysTenure")) {
3101 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != JVMFlag::SUCCESS) {
3102 return JNI_EINVAL;
3103 }
3104 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != JVMFlag::SUCCESS) {
3105 return JNI_EINVAL;
3106 }
3107 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0) != JVMFlag::SUCCESS) {
3108 return JNI_EINVAL;
3109 }
3110 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) {
3111 uintx max_tenuring_thresh = 0;
3112 if (!parse_uintx(tail, &max_tenuring_thresh, 0)) {
3113 jio_fprintf(defaultStream::error_stream(),
3114 "Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail);
3115 return JNI_EINVAL;
3116 }
3117
3118 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh) != JVMFlag::SUCCESS) {
3119 return JNI_EINVAL;
3120 }
3121
3122 if (MaxTenuringThreshold == 0) {
3123 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != JVMFlag::SUCCESS) {
3124 return JNI_EINVAL;
3125 }
3126 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != JVMFlag::SUCCESS) {
3127 return JNI_EINVAL;
3128 }
3129 } else {
3130 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != JVMFlag::SUCCESS) {
3131 return JNI_EINVAL;
3132 }
3133 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != JVMFlag::SUCCESS) {
3134 return JNI_EINVAL;
3135 }
3136 }
3137 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) {
3138 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false) != JVMFlag::SUCCESS) {
3139 return JNI_EINVAL;
3140 }
3141 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true) != JVMFlag::SUCCESS) {
3142 return JNI_EINVAL;
3143 }
3144 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) {
3145 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false) != JVMFlag::SUCCESS) {
3146 return JNI_EINVAL;
3147 }
3148 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true) != JVMFlag::SUCCESS) {
3149 return JNI_EINVAL;
3150 }
3151 } else if (match_option(option, "-XX:+ExtendedDTraceProbes")) {
3152 #if defined(DTRACE_ENABLED)
3153 if (FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true) != JVMFlag::SUCCESS) {
3154 return JNI_EINVAL;
3155 }
3156 if (FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true) != JVMFlag::SUCCESS) {
3157 return JNI_EINVAL;
3158 }
3159 if (FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true) != JVMFlag::SUCCESS) {
3160 return JNI_EINVAL;
3161 }
3162 if (FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true) != JVMFlag::SUCCESS) {
3163 return JNI_EINVAL;
3164 }
3165 #else // defined(DTRACE_ENABLED)
3166 jio_fprintf(defaultStream::error_stream(),
3167 "ExtendedDTraceProbes flag is not applicable for this configuration\n");
3168 return JNI_EINVAL;
3169 #endif // defined(DTRACE_ENABLED)
3170 #ifdef ASSERT
3171 } else if (match_option(option, "-XX:+FullGCALot")) {
3172 if (FLAG_SET_CMDLINE(bool, FullGCALot, true) != JVMFlag::SUCCESS) {
3173 return JNI_EINVAL;
3174 }
3175 // disable scavenge before parallel mark-compact
3176 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != JVMFlag::SUCCESS) {
3177 return JNI_EINVAL;
3178 }
3179 #endif
3180 #if !INCLUDE_MANAGEMENT
3181 } else if (match_option(option, "-XX:+ManagementServer")) {
3182 jio_fprintf(defaultStream::error_stream(),
3183 "ManagementServer is not supported in this VM.\n");
3184 return JNI_ERR;
3185 #endif // INCLUDE_MANAGEMENT
3186 #if INCLUDE_JFR
3187 } else if (match_jfr_option(&option)) {
3188 return JNI_EINVAL;
3189 #endif
3190 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx
3191 // Skip -XX:Flags= and -XX:VMOptionsFile= since those cases have
3192 // already been handled
3193 if ((strncmp(tail, "Flags=", strlen("Flags=")) != 0) &&
3194 (strncmp(tail, "VMOptionsFile=", strlen("VMOptionsFile=")) != 0)) {
3195 if (!process_argument(tail, args->ignoreUnrecognized, origin)) {
3196 return JNI_EINVAL;
3197 }
3198 }
3199 // Unknown option
3200 } else if (is_bad_option(option, args->ignoreUnrecognized)) {
3201 return JNI_ERR;
3202 }
3203 }
3204
3205 // PrintSharedArchiveAndExit will turn on
3206 // -Xshare:on
3207 // -Xlog:class+path=info
3208 if (PrintSharedArchiveAndExit) {
3209 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != JVMFlag::SUCCESS) {
3210 return JNI_EINVAL;
3211 }
3212 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != JVMFlag::SUCCESS) {
3213 return JNI_EINVAL;
3214 }
3215 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, path));
3216 }
3217
3218 // Change the default value for flags which have different default values
3219 // when working with older JDKs.
3220 #ifdef LINUX
3221 if (JDK_Version::current().compare_major(6) <= 0 &&
3222 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) {
3223 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false);
3224 }
3225 #endif // LINUX
3226 fix_appclasspath();
3227 return JNI_OK;
3228 }
3229
3230 void Arguments::add_patch_mod_prefix(const char* module_name, const char* path, bool* patch_mod_javabase) {
3231 // For java.base check for duplicate --patch-module options being specified on the command line.
3232 // This check is only required for java.base, all other duplicate module specifications
3233 // will be checked during module system initialization. The module system initialization
3234 // will throw an ExceptionInInitializerError if this situation occurs.
3235 if (strcmp(module_name, JAVA_BASE_NAME) == 0) {
3236 if (*patch_mod_javabase) {
3237 vm_exit_during_initialization("Cannot specify " JAVA_BASE_NAME " more than once to --patch-module");
3238 } else {
3239 *patch_mod_javabase = true;
3240 }
3241 }
3242
3243 // Create GrowableArray lazily, only if --patch-module has been specified
3244 if (_patch_mod_prefix == NULL) {
3245 _patch_mod_prefix = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<ModulePatchPath*>(10, true);
3246 }
3247
3248 _patch_mod_prefix->push(new ModulePatchPath(module_name, path));
3249 }
3250
3251 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled)
3252 //
3253 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar
3254 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar".
3255 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty
3256 // path is treated as the current directory.
3257 //
3258 // This causes problems with CDS, which requires that all directories specified in the classpath
3259 // must be empty. In most cases, applications do NOT want to load classes from the current
3260 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up
3261 // scripts compatible with CDS.
3262 void Arguments::fix_appclasspath() {
3263 if (IgnoreEmptyClassPaths) {
3264 const char separator = *os::path_separator();
3265 const char* src = _java_class_path->value();
3266
3267 // skip over all the leading empty paths
3268 while (*src == separator) {
3269 src ++;
3270 }
3271
3272 char* copy = os::strdup_check_oom(src, mtArguments);
3273
3274 // trim all trailing empty paths
3275 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) {
3276 *tail = '\0';
3277 }
3278
3279 char from[3] = {separator, separator, '\0'};
3280 char to [2] = {separator, '\0'};
3281 while (StringUtils::replace_no_expand(copy, from, to) > 0) {
3282 // Keep replacing "::" -> ":" until we have no more "::" (non-windows)
3283 // Keep replacing ";;" -> ";" until we have no more ";;" (windows)
3284 }
3285
3286 _java_class_path->set_writeable_value(copy);
3287 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore
3288 }
3289 }
3290
3291 jint Arguments::finalize_vm_init_args(bool patch_mod_javabase) {
3292 // check if the default lib/endorsed directory exists; if so, error
3293 char path[JVM_MAXPATHLEN];
3294 const char* fileSep = os::file_separator();
3295 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep);
3296
3297 DIR* dir = os::opendir(path);
3298 if (dir != NULL) {
3299 jio_fprintf(defaultStream::output_stream(),
3300 "<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n"
3301 "in modular form will be supported via the concept of upgradeable modules.\n");
3302 os::closedir(dir);
3303 return JNI_ERR;
3304 }
3305
3306 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep);
3307 dir = os::opendir(path);
3308 if (dir != NULL) {
3309 jio_fprintf(defaultStream::output_stream(),
3310 "<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; "
3311 "Use -classpath instead.\n.");
3312 os::closedir(dir);
3313 return JNI_ERR;
3314 }
3315
3316 // This must be done after all arguments have been processed
3317 // and the container support has been initialized since AggressiveHeap
3318 // relies on the amount of total memory available.
3319 if (AggressiveHeap) {
3320 jint result = set_aggressive_heap_flags();
3321 if (result != JNI_OK) {
3322 return result;
3323 }
3324 }
3325
3326 // This must be done after all arguments have been processed.
3327 // java_compiler() true means set to "NONE" or empty.
3328 if (java_compiler() && !xdebug_mode()) {
3329 // For backwards compatibility, we switch to interpreted mode if
3330 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was
3331 // not specified.
3332 set_mode_flags(_int);
3333 }
3334
3335 // CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode),
3336 // but like -Xint, leave compilation thresholds unaffected.
3337 // With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well.
3338 if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) {
3339 set_mode_flags(_int);
3340 }
3341
3342 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set
3343 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) {
3344 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold);
3345 }
3346
3347 #if !COMPILER2_OR_JVMCI
3348 // Don't degrade server performance for footprint
3349 if (FLAG_IS_DEFAULT(UseLargePages) &&
3350 MaxHeapSize < LargePageHeapSizeThreshold) {
3351 // No need for large granularity pages w/small heaps.
3352 // Note that large pages are enabled/disabled for both the
3353 // Java heap and the code cache.
3354 FLAG_SET_DEFAULT(UseLargePages, false);
3355 }
3356
3357 #elif defined(COMPILER2)
3358 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) {
3359 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1);
3360 }
3361 #endif
3362
3363 #if !COMPILER2_OR_JVMCI
3364 UNSUPPORTED_OPTION(ProfileInterpreter);
3365 NOT_PRODUCT(UNSUPPORTED_OPTION(TraceProfileInterpreter));
3366 #endif
3367
3368 #ifndef TIERED
3369 // Tiered compilation is undefined.
3370 UNSUPPORTED_OPTION(TieredCompilation);
3371 #endif
3372
3373 if (!check_vm_args_consistency()) {
3374 return JNI_ERR;
3375 }
3376
3377 #if INCLUDE_JVMCI
3378 if (EnableJVMCI &&
3379 !create_numbered_property("jdk.module.addmods", "jdk.internal.vm.ci", addmods_count++)) {
3380 return JNI_ENOMEM;
3381 }
3382 #endif
3383
3384 #if INCLUDE_JVMCI
3385 if (UseJVMCICompiler) {
3386 Compilation_mode = CompMode_server;
3387 }
3388 #endif
3389
3390 #if INCLUDE_CDS
3391 if (DumpSharedSpaces) {
3392 // Disable biased locking now as it interferes with the clean up of
3393 // the archived Klasses and Java string objects (at dump time only).
3394 UseBiasedLocking = false;
3395
3396 // Always verify non-system classes during CDS dump
3397 if (!BytecodeVerificationRemote) {
3398 BytecodeVerificationRemote = true;
3399 log_info(cds)("All non-system classes will be verified (-Xverify:remote) during CDS dump time.");
3400 }
3401 }
3402 if (UseSharedSpaces && patch_mod_javabase) {
3403 no_shared_spaces("CDS is disabled when " JAVA_BASE_NAME " module is patched.");
3404 }
3405 if (UseSharedSpaces && !DumpSharedSpaces && check_unsupported_cds_runtime_properties()) {
3406 FLAG_SET_DEFAULT(UseSharedSpaces, false);
3407 }
3408 #endif
3409
3410 #ifndef CAN_SHOW_REGISTERS_ON_ASSERT
3411 UNSUPPORTED_OPTION(ShowRegistersOnAssert);
3412 #endif // CAN_SHOW_REGISTERS_ON_ASSERT
3413
3414 return JNI_OK;
3415 }
3416
3417 // Helper class for controlling the lifetime of JavaVMInitArgs
3418 // objects. The contents of the JavaVMInitArgs are guaranteed to be
3419 // deleted on the destruction of the ScopedVMInitArgs object.
3420 class ScopedVMInitArgs : public StackObj {
3421 private:
3422 JavaVMInitArgs _args;
3423 char* _container_name;
3424 bool _is_set;
3425 char* _vm_options_file_arg;
3426
3427 public:
3428 ScopedVMInitArgs(const char *container_name) {
3429 _args.version = JNI_VERSION_1_2;
3430 _args.nOptions = 0;
3431 _args.options = NULL;
3432 _args.ignoreUnrecognized = false;
3433 _container_name = (char *)container_name;
3434 _is_set = false;
3435 _vm_options_file_arg = NULL;
3436 }
3437
3438 // Populates the JavaVMInitArgs object represented by this
3439 // ScopedVMInitArgs object with the arguments in options. The
3440 // allocated memory is deleted by the destructor. If this method
3441 // returns anything other than JNI_OK, then this object is in a
3442 // partially constructed state, and should be abandoned.
3443 jint set_args(GrowableArray<JavaVMOption>* options) {
3444 _is_set = true;
3445 JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL(
3446 JavaVMOption, options->length(), mtArguments);
3447 if (options_arr == NULL) {
3448 return JNI_ENOMEM;
3449 }
3450 _args.options = options_arr;
3451
3452 for (int i = 0; i < options->length(); i++) {
3453 options_arr[i] = options->at(i);
3454 options_arr[i].optionString = os::strdup(options_arr[i].optionString);
3455 if (options_arr[i].optionString == NULL) {
3456 // Rely on the destructor to do cleanup.
3457 _args.nOptions = i;
3458 return JNI_ENOMEM;
3459 }
3460 }
3461
3462 _args.nOptions = options->length();
3463 _args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions;
3464 return JNI_OK;
3465 }
3466
3467 JavaVMInitArgs* get() { return &_args; }
3468 char* container_name() { return _container_name; }
3469 bool is_set() { return _is_set; }
3470 bool found_vm_options_file_arg() { return _vm_options_file_arg != NULL; }
3471 char* vm_options_file_arg() { return _vm_options_file_arg; }
3472
3473 void set_vm_options_file_arg(const char *vm_options_file_arg) {
3474 if (_vm_options_file_arg != NULL) {
3475 os::free(_vm_options_file_arg);
3476 }
3477 _vm_options_file_arg = os::strdup_check_oom(vm_options_file_arg);
3478 }
3479
3480 ~ScopedVMInitArgs() {
3481 if (_vm_options_file_arg != NULL) {
3482 os::free(_vm_options_file_arg);
3483 }
3484 if (_args.options == NULL) return;
3485 for (int i = 0; i < _args.nOptions; i++) {
3486 os::free(_args.options[i].optionString);
3487 }
3488 FREE_C_HEAP_ARRAY(JavaVMOption, _args.options);
3489 }
3490
3491 // Insert options into this option list, to replace option at
3492 // vm_options_file_pos (-XX:VMOptionsFile)
3493 jint insert(const JavaVMInitArgs* args,
3494 const JavaVMInitArgs* args_to_insert,
3495 const int vm_options_file_pos) {
3496 assert(_args.options == NULL, "shouldn't be set yet");
3497 assert(args_to_insert->nOptions != 0, "there should be args to insert");
3498 assert(vm_options_file_pos != -1, "vm_options_file_pos should be set");
3499
3500 int length = args->nOptions + args_to_insert->nOptions - 1;
3501 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments)
3502 GrowableArray<JavaVMOption>(length, true); // Construct new option array
3503 for (int i = 0; i < args->nOptions; i++) {
3504 if (i == vm_options_file_pos) {
3505 // insert the new options starting at the same place as the
3506 // -XX:VMOptionsFile option
3507 for (int j = 0; j < args_to_insert->nOptions; j++) {
3508 options->push(args_to_insert->options[j]);
3509 }
3510 } else {
3511 options->push(args->options[i]);
3512 }
3513 }
3514 // make into options array
3515 jint result = set_args(options);
3516 delete options;
3517 return result;
3518 }
3519 };
3520
3521 jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) {
3522 return parse_options_environment_variable("_JAVA_OPTIONS", args);
3523 }
3524
3525 jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) {
3526 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args);
3527 }
3528
3529 jint Arguments::parse_options_environment_variable(const char* name,
3530 ScopedVMInitArgs* vm_args) {
3531 char *buffer = ::getenv(name);
3532
3533 // Don't check this environment variable if user has special privileges
3534 // (e.g. unix su command).
3535 if (buffer == NULL || os::have_special_privileges()) {
3536 return JNI_OK;
3537 }
3538
3539 if ((buffer = os::strdup(buffer)) == NULL) {
3540 return JNI_ENOMEM;
3541 }
3542
3543 jio_fprintf(defaultStream::error_stream(),
3544 "Picked up %s: %s\n", name, buffer);
3545
3546 int retcode = parse_options_buffer(name, buffer, strlen(buffer), vm_args);
3547
3548 os::free(buffer);
3549 return retcode;
3550 }
3551
3552 jint Arguments::parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args) {
3553 // read file into buffer
3554 int fd = ::open(file_name, O_RDONLY);
3555 if (fd < 0) {
3556 jio_fprintf(defaultStream::error_stream(),
3557 "Could not open options file '%s'\n",
3558 file_name);
3559 return JNI_ERR;
3560 }
3561
3562 struct stat stbuf;
3563 int retcode = os::stat(file_name, &stbuf);
3564 if (retcode != 0) {
3565 jio_fprintf(defaultStream::error_stream(),
3566 "Could not stat options file '%s'\n",
3567 file_name);
3568 os::close(fd);
3569 return JNI_ERR;
3570 }
3571
3572 if (stbuf.st_size == 0) {
3573 // tell caller there is no option data and that is ok
3574 os::close(fd);
3575 return JNI_OK;
3576 }
3577
3578 // '+ 1' for NULL termination even with max bytes
3579 size_t bytes_alloc = stbuf.st_size + 1;
3580
3581 char *buf = NEW_C_HEAP_ARRAY_RETURN_NULL(char, bytes_alloc, mtArguments);
3582 if (NULL == buf) {
3583 jio_fprintf(defaultStream::error_stream(),
3584 "Could not allocate read buffer for options file parse\n");
3585 os::close(fd);
3586 return JNI_ENOMEM;
3587 }
3588
3589 memset(buf, 0, bytes_alloc);
3590
3591 // Fill buffer
3592 // Use ::read() instead of os::read because os::read()
3593 // might do a thread state transition
3594 // and it is too early for that here
3595
3596 ssize_t bytes_read = ::read(fd, (void *)buf, (unsigned)bytes_alloc);
3597 os::close(fd);
3598 if (bytes_read < 0) {
3599 FREE_C_HEAP_ARRAY(char, buf);
3600 jio_fprintf(defaultStream::error_stream(),
3601 "Could not read options file '%s'\n", file_name);
3602 return JNI_ERR;
3603 }
3604
3605 if (bytes_read == 0) {
3606 // tell caller there is no option data and that is ok
3607 FREE_C_HEAP_ARRAY(char, buf);
3608 return JNI_OK;
3609 }
3610
3611 retcode = parse_options_buffer(file_name, buf, bytes_read, vm_args);
3612
3613 FREE_C_HEAP_ARRAY(char, buf);
3614 return retcode;
3615 }
3616
3617 jint Arguments::parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args) {
3618 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<JavaVMOption>(2, true); // Construct option array
3619
3620 // some pointers to help with parsing
3621 char *buffer_end = buffer + buf_len;
3622 char *opt_hd = buffer;
3623 char *wrt = buffer;
3624 char *rd = buffer;
3625
3626 // parse all options
3627 while (rd < buffer_end) {
3628 // skip leading white space from the input string
3629 while (rd < buffer_end && isspace(*rd)) {
3630 rd++;
3631 }
3632
3633 if (rd >= buffer_end) {
3634 break;
3635 }
3636
3637 // Remember this is where we found the head of the token.
3638 opt_hd = wrt;
3639
3640 // Tokens are strings of non white space characters separated
3641 // by one or more white spaces.
3642 while (rd < buffer_end && !isspace(*rd)) {
3643 if (*rd == '\'' || *rd == '"') { // handle a quoted string
3644 int quote = *rd; // matching quote to look for
3645 rd++; // don't copy open quote
3646 while (rd < buffer_end && *rd != quote) {
3647 // include everything (even spaces)
3648 // up until the close quote
3649 *wrt++ = *rd++; // copy to option string
3650 }
3651
3652 if (rd < buffer_end) {
3653 rd++; // don't copy close quote
3654 } else {
3655 // did not see closing quote
3656 jio_fprintf(defaultStream::error_stream(),
3657 "Unmatched quote in %s\n", name);
3658 delete options;
3659 return JNI_ERR;
3660 }
3661 } else {
3662 *wrt++ = *rd++; // copy to option string
3663 }
3664 }
3665
3666 // steal a white space character and set it to NULL
3667 *wrt++ = '\0';
3668 // We now have a complete token
3669
3670 JavaVMOption option;
3671 option.optionString = opt_hd;
3672 option.extraInfo = NULL;
3673
3674 options->append(option); // Fill in option
3675
3676 rd++; // Advance to next character
3677 }
3678
3679 // Fill out JavaVMInitArgs structure.
3680 jint status = vm_args->set_args(options);
3681
3682 delete options;
3683 return status;
3684 }
3685
3686 void Arguments::set_shared_spaces_flags() {
3687 if (DumpSharedSpaces) {
3688 if (FailOverToOldVerifier) {
3689 // Don't fall back to the old verifier on verification failure. If a
3690 // class fails verification with the split verifier, it might fail the
3691 // CDS runtime verifier constraint check. In that case, we don't want
3692 // to share the class. We only archive classes that pass the split verifier.
3693 FLAG_SET_DEFAULT(FailOverToOldVerifier, false);
3694 }
3695
3696 if (RequireSharedSpaces) {
3697 warning("Cannot dump shared archive while using shared archive");
3698 }
3699 UseSharedSpaces = false;
3700 #ifdef _LP64
3701 if (!UseCompressedOops || !UseCompressedClassPointers) {
3702 vm_exit_during_initialization(
3703 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL);
3704 }
3705 } else {
3706 if (!UseCompressedOops || !UseCompressedClassPointers) {
3707 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces.");
3708 }
3709 #endif
3710 }
3711 }
3712
3713 // Sharing support
3714 // Construct the path to the archive
3715 static char* get_shared_archive_path() {
3716 char *shared_archive_path;
3717 if (SharedArchiveFile == NULL) {
3718 char jvm_path[JVM_MAXPATHLEN];
3719 os::jvm_path(jvm_path, sizeof(jvm_path));
3720 char *end = strrchr(jvm_path, *os::file_separator());
3721 if (end != NULL) *end = '\0';
3722 size_t jvm_path_len = strlen(jvm_path);
3723 size_t file_sep_len = strlen(os::file_separator());
3724 const size_t len = jvm_path_len + file_sep_len + 20;
3725 shared_archive_path = NEW_C_HEAP_ARRAY(char, len, mtArguments);
3726 if (shared_archive_path != NULL) {
3727 jio_snprintf(shared_archive_path, len, "%s%sclasses.jsa",
3728 jvm_path, os::file_separator());
3729 }
3730 } else {
3731 shared_archive_path = os::strdup_check_oom(SharedArchiveFile, mtArguments);
3732 }
3733 return shared_archive_path;
3734 }
3735
3736 #ifndef PRODUCT
3737 // Determine whether LogVMOutput should be implicitly turned on.
3738 static bool use_vm_log() {
3739 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) ||
3740 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods ||
3741 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers ||
3742 PrintAssembly || TraceDeoptimization || TraceDependencies ||
3743 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) {
3744 return true;
3745 }
3746
3747 #ifdef COMPILER1
3748 if (PrintC1Statistics) {
3749 return true;
3750 }
3751 #endif // COMPILER1
3752
3753 #ifdef COMPILER2
3754 if (PrintOptoAssembly || PrintOptoStatistics) {
3755 return true;
3756 }
3757 #endif // COMPILER2
3758
3759 return false;
3760 }
3761
3762 #endif // PRODUCT
3763
3764 bool Arguments::args_contains_vm_options_file_arg(const JavaVMInitArgs* args) {
3765 for (int index = 0; index < args->nOptions; index++) {
3766 const JavaVMOption* option = args->options + index;
3767 const char* tail;
3768 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
3769 return true;
3770 }
3771 }
3772 return false;
3773 }
3774
3775 jint Arguments::insert_vm_options_file(const JavaVMInitArgs* args,
3776 const char* vm_options_file,
3777 const int vm_options_file_pos,
3778 ScopedVMInitArgs* vm_options_file_args,
3779 ScopedVMInitArgs* args_out) {
3780 jint code = parse_vm_options_file(vm_options_file, vm_options_file_args);
3781 if (code != JNI_OK) {
3782 return code;
3783 }
3784
3785 if (vm_options_file_args->get()->nOptions < 1) {
3786 return JNI_OK;
3787 }
3788
3789 if (args_contains_vm_options_file_arg(vm_options_file_args->get())) {
3790 jio_fprintf(defaultStream::error_stream(),
3791 "A VM options file may not refer to a VM options file. "
3792 "Specification of '-XX:VMOptionsFile=<file-name>' in the "
3793 "options file '%s' in options container '%s' is an error.\n",
3794 vm_options_file_args->vm_options_file_arg(),
3795 vm_options_file_args->container_name());
3796 return JNI_EINVAL;
3797 }
3798
3799 return args_out->insert(args, vm_options_file_args->get(),
3800 vm_options_file_pos);
3801 }
3802
3803 // Expand -XX:VMOptionsFile found in args_in as needed.
3804 // mod_args and args_out parameters may return values as needed.
3805 jint Arguments::expand_vm_options_as_needed(const JavaVMInitArgs* args_in,
3806 ScopedVMInitArgs* mod_args,
3807 JavaVMInitArgs** args_out) {
3808 jint code = match_special_option_and_act(args_in, mod_args);
3809 if (code != JNI_OK) {
3810 return code;
3811 }
3812
3813 if (mod_args->is_set()) {
3814 // args_in contains -XX:VMOptionsFile and mod_args contains the
3815 // original options from args_in along with the options expanded
3816 // from the VMOptionsFile. Return a short-hand to the caller.
3817 *args_out = mod_args->get();
3818 } else {
3819 *args_out = (JavaVMInitArgs *)args_in; // no changes so use args_in
3820 }
3821 return JNI_OK;
3822 }
3823
3824 jint Arguments::match_special_option_and_act(const JavaVMInitArgs* args,
3825 ScopedVMInitArgs* args_out) {
3826 // Remaining part of option string
3827 const char* tail;
3828 ScopedVMInitArgs vm_options_file_args(args_out->container_name());
3829
3830 for (int index = 0; index < args->nOptions; index++) {
3831 const JavaVMOption* option = args->options + index;
3832 if (ArgumentsExt::process_options(option)) {
3833 continue;
3834 }
3835 if (match_option(option, "-XX:Flags=", &tail)) {
3836 Arguments::set_jvm_flags_file(tail);
3837 continue;
3838 }
3839 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
3840 if (vm_options_file_args.found_vm_options_file_arg()) {
3841 jio_fprintf(defaultStream::error_stream(),
3842 "The option '%s' is already specified in the options "
3843 "container '%s' so the specification of '%s' in the "
3844 "same options container is an error.\n",
3845 vm_options_file_args.vm_options_file_arg(),
3846 vm_options_file_args.container_name(),
3847 option->optionString);
3848 return JNI_EINVAL;
3849 }
3850 vm_options_file_args.set_vm_options_file_arg(option->optionString);
3851 // If there's a VMOptionsFile, parse that
3852 jint code = insert_vm_options_file(args, tail, index,
3853 &vm_options_file_args, args_out);
3854 if (code != JNI_OK) {
3855 return code;
3856 }
3857 args_out->set_vm_options_file_arg(vm_options_file_args.vm_options_file_arg());
3858 if (args_out->is_set()) {
3859 // The VMOptions file inserted some options so switch 'args'
3860 // to the new set of options, and continue processing which
3861 // preserves "last option wins" semantics.
3862 args = args_out->get();
3863 // The first option from the VMOptionsFile replaces the
3864 // current option. So we back track to process the
3865 // replacement option.
3866 index--;
3867 }
3868 continue;
3869 }
3870 if (match_option(option, "-XX:+PrintVMOptions")) {
3871 PrintVMOptions = true;
3872 continue;
3873 }
3874 if (match_option(option, "-XX:-PrintVMOptions")) {
3875 PrintVMOptions = false;
3876 continue;
3877 }
3878 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) {
3879 IgnoreUnrecognizedVMOptions = true;
3880 continue;
3881 }
3882 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) {
3883 IgnoreUnrecognizedVMOptions = false;
3884 continue;
3885 }
3886 if (match_option(option, "-XX:+PrintFlagsInitial")) {
3887 JVMFlag::printFlags(tty, false);
3888 vm_exit(0);
3889 }
3890 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) {
3891 #if INCLUDE_NMT
3892 // The launcher did not setup nmt environment variable properly.
3893 if (!MemTracker::check_launcher_nmt_support(tail)) {
3894 warning("Native Memory Tracking did not setup properly, using wrong launcher?");
3895 }
3896
3897 // Verify if nmt option is valid.
3898 if (MemTracker::verify_nmt_option()) {
3899 // Late initialization, still in single-threaded mode.
3900 if (MemTracker::tracking_level() >= NMT_summary) {
3901 MemTracker::init();
3902 }
3903 } else {
3904 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL);
3905 }
3906 continue;
3907 #else
3908 jio_fprintf(defaultStream::error_stream(),
3909 "Native Memory Tracking is not supported in this VM\n");
3910 return JNI_ERR;
3911 #endif
3912 }
3913
3914 #ifndef PRODUCT
3915 if (match_option(option, "-XX:+PrintFlagsWithComments")) {
3916 JVMFlag::printFlags(tty, true);
3917 vm_exit(0);
3918 }
3919 #endif
3920 }
3921 return JNI_OK;
3922 }
3923
3924 static void print_options(const JavaVMInitArgs *args) {
3925 const char* tail;
3926 for (int index = 0; index < args->nOptions; index++) {
3927 const JavaVMOption *option = args->options + index;
3928 if (match_option(option, "-XX:", &tail)) {
3929 logOption(tail);
3930 }
3931 }
3932 }
3933
3934 bool Arguments::handle_deprecated_print_gc_flags() {
3935 if (PrintGC) {
3936 log_warning(gc)("-XX:+PrintGC is deprecated. Will use -Xlog:gc instead.");
3937 }
3938 if (PrintGCDetails) {
3939 log_warning(gc)("-XX:+PrintGCDetails is deprecated. Will use -Xlog:gc* instead.");
3940 }
3941
3942 if (_gc_log_filename != NULL) {
3943 // -Xloggc was used to specify a filename
3944 const char* gc_conf = PrintGCDetails ? "gc*" : "gc";
3945
3946 LogTarget(Error, logging) target;
3947 LogStream errstream(target);
3948 return LogConfiguration::parse_log_arguments(_gc_log_filename, gc_conf, NULL, NULL, &errstream);
3949 } else if (PrintGC || PrintGCDetails) {
3950 LogConfiguration::configure_stdout(LogLevel::Info, !PrintGCDetails, LOG_TAGS(gc));
3951 }
3952 return true;
3953 }
3954
3955 void Arguments::handle_extra_cms_flags(const char* msg) {
3956 SpecialFlag flag;
3957 const char *flag_name = "UseConcMarkSweepGC";
3958 if (lookup_special_flag(flag_name, flag)) {
3959 handle_aliases_and_deprecation(flag_name, /* print warning */ true);
3960 warning("%s", msg);
3961 }
3962 }
3963
3964 // Parse entry point called from JNI_CreateJavaVM
3965
3966 jint Arguments::parse(const JavaVMInitArgs* initial_cmd_args) {
3967 assert(verify_special_jvm_flags(), "deprecated and obsolete flag table inconsistent");
3968
3969 // Initialize ranges, constraints and writeables
3970 JVMFlagRangeList::init();
3971 JVMFlagConstraintList::init();
3972 JVMFlagWriteableList::init();
3973
3974 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed.
3975 const char* hotspotrc = ".hotspotrc";
3976 bool settings_file_specified = false;
3977 bool needs_hotspotrc_warning = false;
3978 ScopedVMInitArgs initial_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
3979 ScopedVMInitArgs initial_java_options_args("env_var='_JAVA_OPTIONS'");
3980
3981 // Pointers to current working set of containers
3982 JavaVMInitArgs* cur_cmd_args;
3983 JavaVMInitArgs* cur_java_options_args;
3984 JavaVMInitArgs* cur_java_tool_options_args;
3985
3986 // Containers for modified/expanded options
3987 ScopedVMInitArgs mod_cmd_args("cmd_line_args");
3988 ScopedVMInitArgs mod_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
3989 ScopedVMInitArgs mod_java_options_args("env_var='_JAVA_OPTIONS'");
3990
3991
3992 jint code =
3993 parse_java_tool_options_environment_variable(&initial_java_tool_options_args);
3994 if (code != JNI_OK) {
3995 return code;
3996 }
3997
3998 code = parse_java_options_environment_variable(&initial_java_options_args);
3999 if (code != JNI_OK) {
4000 return code;
4001 }
4002
4003 code = expand_vm_options_as_needed(initial_java_tool_options_args.get(),
4004 &mod_java_tool_options_args,
4005 &cur_java_tool_options_args);
4006 if (code != JNI_OK) {
4007 return code;
4008 }
4009
4010 code = expand_vm_options_as_needed(initial_cmd_args,
4011 &mod_cmd_args,
4012 &cur_cmd_args);
4013 if (code != JNI_OK) {
4014 return code;
4015 }
4016
4017 code = expand_vm_options_as_needed(initial_java_options_args.get(),
4018 &mod_java_options_args,
4019 &cur_java_options_args);
4020 if (code != JNI_OK) {
4021 return code;
4022 }
4023
4024 const char* flags_file = Arguments::get_jvm_flags_file();
4025 settings_file_specified = (flags_file != NULL);
4026
4027 if (IgnoreUnrecognizedVMOptions) {
4028 cur_cmd_args->ignoreUnrecognized = true;
4029 cur_java_tool_options_args->ignoreUnrecognized = true;
4030 cur_java_options_args->ignoreUnrecognized = true;
4031 }
4032
4033 // Parse specified settings file
4034 if (settings_file_specified) {
4035 if (!process_settings_file(flags_file, true,
4036 cur_cmd_args->ignoreUnrecognized)) {
4037 return JNI_EINVAL;
4038 }
4039 } else {
4040 #ifdef ASSERT
4041 // Parse default .hotspotrc settings file
4042 if (!process_settings_file(".hotspotrc", false,
4043 cur_cmd_args->ignoreUnrecognized)) {
4044 return JNI_EINVAL;
4045 }
4046 #else
4047 struct stat buf;
4048 if (os::stat(hotspotrc, &buf) == 0) {
4049 needs_hotspotrc_warning = true;
4050 }
4051 #endif
4052 }
4053
4054 if (PrintVMOptions) {
4055 print_options(cur_java_tool_options_args);
4056 print_options(cur_cmd_args);
4057 print_options(cur_java_options_args);
4058 }
4059
4060 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS
4061 jint result = parse_vm_init_args(cur_java_tool_options_args,
4062 cur_java_options_args,
4063 cur_cmd_args);
4064
4065 if (result != JNI_OK) {
4066 return result;
4067 }
4068
4069 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed.
4070 SharedArchivePath = get_shared_archive_path();
4071 if (SharedArchivePath == NULL) {
4072 return JNI_ENOMEM;
4073 }
4074
4075 // Set up VerifySharedSpaces
4076 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) {
4077 VerifySharedSpaces = true;
4078 }
4079
4080 // Delay warning until here so that we've had a chance to process
4081 // the -XX:-PrintWarnings flag
4082 if (needs_hotspotrc_warning) {
4083 warning("%s file is present but has been ignored. "
4084 "Run with -XX:Flags=%s to load the file.",
4085 hotspotrc, hotspotrc);
4086 }
4087
4088 if (needs_module_property_warning) {
4089 warning("Ignoring system property options whose names match the '-Djdk.module.*'."
4090 " names that are reserved for internal use.");
4091 }
4092
4093 #if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
4094 UNSUPPORTED_OPTION(UseLargePages);
4095 #endif
4096
4097 ArgumentsExt::report_unsupported_options();
4098
4099 #ifndef PRODUCT
4100 if (TraceBytecodesAt != 0) {
4101 TraceBytecodes = true;
4102 }
4103 if (CountCompiledCalls) {
4104 if (UseCounterDecay) {
4105 warning("UseCounterDecay disabled because CountCalls is set");
4106 UseCounterDecay = false;
4107 }
4108 }
4109 #endif // PRODUCT
4110
4111 if (ScavengeRootsInCode == 0) {
4112 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) {
4113 warning("Forcing ScavengeRootsInCode non-zero");
4114 }
4115 ScavengeRootsInCode = 1;
4116 }
4117
4118 if (!handle_deprecated_print_gc_flags()) {
4119 return JNI_EINVAL;
4120 }
4121
4122 // Set object alignment values.
4123 set_object_alignment();
4124
4125 #if !INCLUDE_CDS
4126 if (DumpSharedSpaces || RequireSharedSpaces) {
4127 jio_fprintf(defaultStream::error_stream(),
4128 "Shared spaces are not supported in this VM\n");
4129 return JNI_ERR;
4130 }
4131 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) ||
4132 log_is_enabled(Info, cds)) {
4133 warning("Shared spaces are not supported in this VM");
4134 FLAG_SET_DEFAULT(UseSharedSpaces, false);
4135 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(cds));
4136 }
4137 no_shared_spaces("CDS Disabled");
4138 #endif // INCLUDE_CDS
4139
4140 return JNI_OK;
4141 }
4142
4143 jint Arguments::apply_ergo() {
4144 // Set flags based on ergonomics.
4145 jint result = set_ergonomics_flags();
4146 if (result != JNI_OK) return result;
4147
4148 #if INCLUDE_JVMCI
4149 set_jvmci_specific_flags();
4150 #endif
4151
4152 set_shared_spaces_flags();
4153
4154 if (TieredCompilation) {
4155 set_tiered_flags();
4156 } else {
4157 int max_compilation_policy_choice = 1;
4158 #ifdef COMPILER2
4159 if (is_server_compilation_mode_vm()) {
4160 max_compilation_policy_choice = 2;
4161 }
4162 #endif
4163 // Check if the policy is valid.
4164 if (CompilationPolicyChoice >= max_compilation_policy_choice) {
4165 vm_exit_during_initialization(
4166 "Incompatible compilation policy selected", NULL);
4167 }
4168 // Scale CompileThreshold
4169 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves CompileThreshold unchanged.
4170 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
4171 FLAG_SET_ERGO(intx, CompileThreshold, scaled_compile_threshold(CompileThreshold));
4172 }
4173 }
4174
4175 #ifdef COMPILER2
4176 #ifndef PRODUCT
4177 if (PrintIdealGraphLevel > 0) {
4178 FLAG_SET_ERGO(bool, PrintIdealGraph, true);
4179 }
4180 #endif
4181 #endif
4182
4183 // Set heap size based on available physical memory
4184 set_heap_size();
4185
4186 GCConfig::arguments()->initialize();
4187
4188 // Initialize Metaspace flags and alignments
4189 Metaspace::ergo_initialize();
4190
4191 // Set bytecode rewriting flags
4192 set_bytecode_flags();
4193
4194 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled
4195 jint code = set_aggressive_opts_flags();
4196 if (code != JNI_OK) {
4197 return code;
4198 }
4199
4200 // Turn off biased locking for locking debug mode flags,
4201 // which are subtly different from each other but neither works with
4202 // biased locking
4203 if (UseHeavyMonitors
4204 #ifdef COMPILER1
4205 || !UseFastLocking
4206 #endif // COMPILER1
4207 #if INCLUDE_JVMCI
4208 || !JVMCIUseFastLocking
4209 #endif
4210 ) {
4211 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) {
4212 // flag set to true on command line; warn the user that they
4213 // can't enable biased locking here
4214 warning("Biased Locking is not supported with locking debug flags"
4215 "; ignoring UseBiasedLocking flag." );
4216 }
4217 UseBiasedLocking = false;
4218 }
4219
4220 #ifdef CC_INTERP
4221 // Clear flags not supported on zero.
4222 FLAG_SET_DEFAULT(ProfileInterpreter, false);
4223 FLAG_SET_DEFAULT(UseBiasedLocking, false);
4224 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false));
4225 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false));
4226 #endif // CC_INTERP
4227
4228 #ifdef COMPILER2
4229 if (!EliminateLocks) {
4230 EliminateNestedLocks = false;
4231 }
4232 if (!Inline) {
4233 IncrementalInline = false;
4234 }
4235 #ifndef PRODUCT
4236 if (!IncrementalInline) {
4237 AlwaysIncrementalInline = false;
4238 }
4239 #endif
4240 if (!UseTypeSpeculation && FLAG_IS_DEFAULT(TypeProfileLevel)) {
4241 // nothing to use the profiling, turn if off
4242 FLAG_SET_DEFAULT(TypeProfileLevel, 0);
4243 }
4244 if (FLAG_IS_DEFAULT(LoopStripMiningIterShortLoop)) {
4245 // blind guess
4246 LoopStripMiningIterShortLoop = LoopStripMiningIter / 10;
4247 }
4248 #endif
4249
4250 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) {
4251 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output");
4252 DebugNonSafepoints = true;
4253 }
4254
4255 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) {
4256 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used");
4257 }
4258
4259 if (UseOnStackReplacement && !UseLoopCounter) {
4260 warning("On-stack-replacement requires loop counters; enabling loop counters");
4261 FLAG_SET_DEFAULT(UseLoopCounter, true);
4262 }
4263
4264 #ifndef PRODUCT
4265 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) {
4266 if (use_vm_log()) {
4267 LogVMOutput = true;
4268 }
4269 }
4270 #endif // PRODUCT
4271
4272 if (PrintCommandLineFlags) {
4273 JVMFlag::printSetFlags(tty);
4274 }
4275
4276 // Apply CPU specific policy for the BiasedLocking
4277 if (UseBiasedLocking) {
4278 if (!VM_Version::use_biased_locking() &&
4279 !(FLAG_IS_CMDLINE(UseBiasedLocking))) {
4280 UseBiasedLocking = false;
4281 }
4282 }
4283 #ifdef COMPILER2
4284 if (!UseBiasedLocking || EmitSync != 0) {
4285 UseOptoBiasInlining = false;
4286 }
4287 #endif
4288
4289 // ThreadLocalHandshakesConstraintFunc handles the constraints.
4290 if (FLAG_IS_DEFAULT(ThreadLocalHandshakes) || !SafepointMechanism::supports_thread_local_poll()) {
4291 log_debug(ergo)("ThreadLocalHandshakes %s", ThreadLocalHandshakes ? "enabled." : "disabled.");
4292 } else {
4293 log_info(ergo)("ThreadLocalHandshakes %s", ThreadLocalHandshakes ? "enabled." : "disabled.");
4294 }
4295
4296 return JNI_OK;
4297 }
4298
4299 jint Arguments::adjust_after_os() {
4300 if (UseNUMA) {
4301 if (!FLAG_IS_DEFAULT(AllocateHeapAt)) {
4302 FLAG_SET_ERGO(bool, UseNUMA, false);
4303 } else if (UseParallelGC || UseParallelOldGC) {
4304 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) {
4305 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M);
4306 }
4307 }
4308 // UseNUMAInterleaving is set to ON for all collectors and
4309 // platforms when UseNUMA is set to ON. NUMA-aware collectors
4310 // such as the parallel collector for Linux and Solaris will
4311 // interleave old gen and survivor spaces on top of NUMA
4312 // allocation policy for the eden space.
4313 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on
4314 // all platforms and ParallelGC on Windows will interleave all
4315 // of the heap spaces across NUMA nodes.
4316 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) {
4317 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true);
4318 }
4319 }
4320 return JNI_OK;
4321 }
4322
4323 int Arguments::PropertyList_count(SystemProperty* pl) {
4324 int count = 0;
4325 while(pl != NULL) {
4326 count++;
4327 pl = pl->next();
4328 }
4329 return count;
4330 }
4331
4332 // Return the number of readable properties.
4333 int Arguments::PropertyList_readable_count(SystemProperty* pl) {
4334 int count = 0;
4335 while(pl != NULL) {
4336 if (pl->is_readable()) {
4337 count++;
4338 }
4339 pl = pl->next();
4340 }
4341 return count;
4342 }
4343
4344 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) {
4345 assert(key != NULL, "just checking");
4346 SystemProperty* prop;
4347 for (prop = pl; prop != NULL; prop = prop->next()) {
4348 if (strcmp(key, prop->key()) == 0) return prop->value();
4349 }
4350 return NULL;
4351 }
4352
4353 // Return the value of the requested property provided that it is a readable property.
4354 const char* Arguments::PropertyList_get_readable_value(SystemProperty *pl, const char* key) {
4355 assert(key != NULL, "just checking");
4356 SystemProperty* prop;
4357 // Return the property value if the keys match and the property is not internal or
4358 // it's the special internal property "jdk.boot.class.path.append".
4359 for (prop = pl; prop != NULL; prop = prop->next()) {
4360 if (strcmp(key, prop->key()) == 0) {
4361 if (!prop->internal()) {
4362 return prop->value();
4363 } else if (strcmp(key, "jdk.boot.class.path.append") == 0) {
4364 return prop->value();
4365 } else {
4366 // Property is internal and not jdk.boot.class.path.append so return NULL.
4367 return NULL;
4368 }
4369 }
4370 }
4371 return NULL;
4372 }
4373
4374 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) {
4375 int count = 0;
4376 const char* ret_val = NULL;
4377
4378 while(pl != NULL) {
4379 if(count >= index) {
4380 ret_val = pl->key();
4381 break;
4382 }
4383 count++;
4384 pl = pl->next();
4385 }
4386
4387 return ret_val;
4388 }
4389
4390 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) {
4391 int count = 0;
4392 char* ret_val = NULL;
4393
4394 while(pl != NULL) {
4395 if(count >= index) {
4396 ret_val = pl->value();
4397 break;
4398 }
4399 count++;
4400 pl = pl->next();
4401 }
4402
4403 return ret_val;
4404 }
4405
4406 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) {
4407 SystemProperty* p = *plist;
4408 if (p == NULL) {
4409 *plist = new_p;
4410 } else {
4411 while (p->next() != NULL) {
4412 p = p->next();
4413 }
4414 p->set_next(new_p);
4415 }
4416 }
4417
4418 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v,
4419 bool writeable, bool internal) {
4420 if (plist == NULL)
4421 return;
4422
4423 SystemProperty* new_p = new SystemProperty(k, v, writeable, internal);
4424 PropertyList_add(plist, new_p);
4425 }
4426
4427 void Arguments::PropertyList_add(SystemProperty *element) {
4428 PropertyList_add(&_system_properties, element);
4429 }
4430
4431 // This add maintains unique property key in the list.
4432 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v,
4433 PropertyAppendable append, PropertyWriteable writeable,
4434 PropertyInternal internal) {
4435 if (plist == NULL)
4436 return;
4437
4438 // If property key exist then update with new value.
4439 SystemProperty* prop;
4440 for (prop = *plist; prop != NULL; prop = prop->next()) {
4441 if (strcmp(k, prop->key()) == 0) {
4442 if (append == AppendProperty) {
4443 prop->append_value(v);
4444 } else {
4445 prop->set_value(v);
4446 }
4447 return;
4448 }
4449 }
4450
4451 PropertyList_add(plist, k, v, writeable == WriteableProperty, internal == InternalProperty);
4452 }
4453
4454 // Update existing property with new value.
4455 void Arguments::PropertyList_update_value(SystemProperty* plist, const char* k, const char* v) {
4456 SystemProperty* prop;
4457 for (prop = plist; prop != NULL; prop = prop->next()) {
4458 if (strcmp(k, prop->key()) == 0) {
4459 prop->set_value(v);
4460 return;
4461 }
4462 }
4463 assert(false, "invalid property");
4464 }
4465
4466 // Copies src into buf, replacing "%%" with "%" and "%p" with pid
4467 // Returns true if all of the source pointed by src has been copied over to
4468 // the destination buffer pointed by buf. Otherwise, returns false.
4469 // Notes:
4470 // 1. If the length (buflen) of the destination buffer excluding the
4471 // NULL terminator character is not long enough for holding the expanded
4472 // pid characters, it also returns false instead of returning the partially
4473 // expanded one.
4474 // 2. The passed in "buflen" should be large enough to hold the null terminator.
4475 bool Arguments::copy_expand_pid(const char* src, size_t srclen,
4476 char* buf, size_t buflen) {
4477 const char* p = src;
4478 char* b = buf;
4479 const char* src_end = &src[srclen];
4480 char* buf_end = &buf[buflen - 1];
4481
4482 while (p < src_end && b < buf_end) {
4483 if (*p == '%') {
4484 switch (*(++p)) {
4485 case '%': // "%%" ==> "%"
4486 *b++ = *p++;
4487 break;
4488 case 'p': { // "%p" ==> current process id
4489 // buf_end points to the character before the last character so
4490 // that we could write '\0' to the end of the buffer.
4491 size_t buf_sz = buf_end - b + 1;
4492 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id());
4493
4494 // if jio_snprintf fails or the buffer is not long enough to hold
4495 // the expanded pid, returns false.
4496 if (ret < 0 || ret >= (int)buf_sz) {
4497 return false;
4498 } else {
4499 b += ret;
4500 assert(*b == '\0', "fail in copy_expand_pid");
4501 if (p == src_end && b == buf_end + 1) {
4502 // reach the end of the buffer.
4503 return true;
4504 }
4505 }
4506 p++;
4507 break;
4508 }
4509 default :
4510 *b++ = '%';
4511 }
4512 } else {
4513 *b++ = *p++;
4514 }
4515 }
4516 *b = '\0';
4517 return (p == src_end); // return false if not all of the source was copied
4518 }