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/commandLineFlagConstraintList.hpp"
46 #include "runtime/commandLineFlagWriteableList.hpp"
47 #include "runtime/commandLineFlagRangeList.hpp"
48 #include "runtime/globals.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
65 // Note: This is a special bug reporting site for the JVM
66 #ifdef VENDOR_URL_VM_BUG
67 # define DEFAULT_VENDOR_URL_BUG VENDOR_URL_VM_BUG
68 #else
69 # define DEFAULT_VENDOR_URL_BUG "http://bugreport.java.com/bugreport/crash.jsp"
70 #endif
71 #define DEFAULT_JAVA_LAUNCHER "generic"
72
73 char* Arguments::_jvm_flags_file = NULL;
74 char** Arguments::_jvm_flags_array = NULL;
75 int Arguments::_num_jvm_flags = 0;
76 char** Arguments::_jvm_args_array = NULL;
77 int Arguments::_num_jvm_args = 0;
78 char* Arguments::_java_command = NULL;
79 SystemProperty* Arguments::_system_properties = NULL;
80 const char* Arguments::_gc_log_filename = NULL;
81 size_t Arguments::_conservative_max_heap_alignment = 0;
82 size_t Arguments::_min_heap_size = 0;
83 Arguments::Mode Arguments::_mode = _mixed;
84 bool Arguments::_java_compiler = false;
85 bool Arguments::_xdebug_mode = false;
86 const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG;
87 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER;
88 int Arguments::_sun_java_launcher_pid = -1;
89 bool Arguments::_sun_java_launcher_is_altjvm = false;
90
91 // These parameters are reset in method parse_vm_init_args()
92 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
93 bool Arguments::_UseOnStackReplacement = UseOnStackReplacement;
94 bool Arguments::_BackgroundCompilation = BackgroundCompilation;
95 bool Arguments::_ClipInlining = ClipInlining;
96 intx Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
97 intx Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
98
99 bool Arguments::_enable_preview = false;
100
101 char* Arguments::SharedArchivePath = NULL;
102
103 AgentLibraryList Arguments::_libraryList;
104 AgentLibraryList Arguments::_agentList;
105
106 abort_hook_t Arguments::_abort_hook = NULL;
107 exit_hook_t Arguments::_exit_hook = NULL;
108 vfprintf_hook_t Arguments::_vfprintf_hook = NULL;
109
110
111 SystemProperty *Arguments::_sun_boot_library_path = NULL;
112 SystemProperty *Arguments::_java_library_path = NULL;
113 SystemProperty *Arguments::_java_home = NULL;
114 SystemProperty *Arguments::_java_class_path = NULL;
115 SystemProperty *Arguments::_jdk_boot_class_path_append = NULL;
116
117 GrowableArray<ModulePatchPath*> *Arguments::_patch_mod_prefix = NULL;
118 PathString *Arguments::_system_boot_class_path = NULL;
119 bool Arguments::_has_jimage = false;
120
121 char* Arguments::_ext_dirs = NULL;
122
123 bool PathString::set_value(const char *value) {
124 if (_value != NULL) {
125 FreeHeap(_value);
126 }
127 _value = AllocateHeap(strlen(value)+1, mtArguments);
128 assert(_value != NULL, "Unable to allocate space for new path value");
129 if (_value != NULL) {
130 strcpy(_value, value);
131 } else {
132 // not able to allocate
133 return false;
134 }
135 return true;
136 }
137
138 void PathString::append_value(const char *value) {
139 char *sp;
140 size_t len = 0;
141 if (value != NULL) {
142 len = strlen(value);
143 if (_value != NULL) {
144 len += strlen(_value);
145 }
146 sp = AllocateHeap(len+2, mtArguments);
147 assert(sp != NULL, "Unable to allocate space for new append path value");
148 if (sp != NULL) {
149 if (_value != NULL) {
150 strcpy(sp, _value);
151 strcat(sp, os::path_separator());
152 strcat(sp, value);
153 FreeHeap(_value);
154 } else {
155 strcpy(sp, value);
156 }
157 _value = sp;
158 }
159 }
160 }
161
162 PathString::PathString(const char* value) {
163 if (value == NULL) {
164 _value = NULL;
165 } else {
166 _value = AllocateHeap(strlen(value)+1, mtArguments);
167 strcpy(_value, value);
168 }
169 }
170
171 PathString::~PathString() {
172 if (_value != NULL) {
173 FreeHeap(_value);
174 _value = NULL;
175 }
176 }
177
178 ModulePatchPath::ModulePatchPath(const char* module_name, const char* path) {
179 assert(module_name != NULL && path != NULL, "Invalid module name or path value");
180 size_t len = strlen(module_name) + 1;
181 _module_name = AllocateHeap(len, mtInternal);
182 strncpy(_module_name, module_name, len); // copy the trailing null
183 _path = new PathString(path);
184 }
185
186 ModulePatchPath::~ModulePatchPath() {
187 if (_module_name != NULL) {
188 FreeHeap(_module_name);
189 _module_name = NULL;
190 }
191 if (_path != NULL) {
192 delete _path;
193 _path = NULL;
194 }
195 }
196
197 SystemProperty::SystemProperty(const char* key, const char* value, bool writeable, bool internal) : PathString(value) {
198 if (key == NULL) {
199 _key = NULL;
200 } else {
201 _key = AllocateHeap(strlen(key)+1, mtArguments);
202 strcpy(_key, key);
203 }
204 _next = NULL;
205 _internal = internal;
206 _writeable = writeable;
207 }
208
209 AgentLibrary::AgentLibrary(const char* name, const char* options,
210 bool is_absolute_path, void* os_lib,
211 bool instrument_lib) {
212 _name = AllocateHeap(strlen(name)+1, mtArguments);
213 strcpy(_name, name);
214 if (options == NULL) {
215 _options = NULL;
216 } else {
217 _options = AllocateHeap(strlen(options)+1, mtArguments);
218 strcpy(_options, options);
219 }
220 _is_absolute_path = is_absolute_path;
221 _os_lib = os_lib;
222 _next = NULL;
223 _state = agent_invalid;
224 _is_static_lib = false;
225 _is_instrument_lib = instrument_lib;
226 }
227
228 // Check if head of 'option' matches 'name', and sets 'tail' to the remaining
229 // part of the option string.
230 static bool match_option(const JavaVMOption *option, const char* name,
231 const char** tail) {
232 size_t len = strlen(name);
233 if (strncmp(option->optionString, name, len) == 0) {
234 *tail = option->optionString + len;
235 return true;
236 } else {
237 return false;
238 }
239 }
240
241 // Check if 'option' matches 'name'. No "tail" is allowed.
242 static bool match_option(const JavaVMOption *option, const char* name) {
243 const char* tail = NULL;
244 bool result = match_option(option, name, &tail);
245 if (tail != NULL && *tail == '\0') {
246 return result;
247 } else {
248 return false;
249 }
250 }
251
252 // Return true if any of the strings in null-terminated array 'names' matches.
253 // If tail_allowed is true, then the tail must begin with a colon; otherwise,
254 // the option must match exactly.
255 static bool match_option(const JavaVMOption* option, const char** names, const char** tail,
256 bool tail_allowed) {
257 for (/* empty */; *names != NULL; ++names) {
258 if (match_option(option, *names, tail)) {
259 if (**tail == '\0' || (tail_allowed && **tail == ':')) {
260 return true;
261 }
262 }
263 }
264 return false;
265 }
266
267 static void logOption(const char* opt) {
268 if (PrintVMOptions) {
269 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt);
270 }
271 }
272
273 bool needs_module_property_warning = false;
274
275 #define MODULE_PROPERTY_PREFIX "jdk.module."
276 #define MODULE_PROPERTY_PREFIX_LEN 11
277 #define ADDEXPORTS "addexports"
278 #define ADDEXPORTS_LEN 10
279 #define ADDREADS "addreads"
280 #define ADDREADS_LEN 8
281 #define ADDOPENS "addopens"
282 #define ADDOPENS_LEN 8
283 #define PATCH "patch"
284 #define PATCH_LEN 5
285 #define ADDMODS "addmods"
286 #define ADDMODS_LEN 7
287 #define LIMITMODS "limitmods"
288 #define LIMITMODS_LEN 9
289 #define PATH "path"
290 #define PATH_LEN 4
291 #define UPGRADE_PATH "upgrade.path"
292 #define UPGRADE_PATH_LEN 12
293
294 void Arguments::add_init_library(const char* name, char* options) {
295 _libraryList.add(new AgentLibrary(name, options, false, NULL));
296 }
297
298 void Arguments::add_init_agent(const char* name, char* options, bool absolute_path) {
299 _agentList.add(new AgentLibrary(name, options, absolute_path, NULL));
300 }
301
302 void Arguments::add_instrument_agent(const char* name, char* options, bool absolute_path) {
303 _agentList.add(new AgentLibrary(name, options, absolute_path, NULL, true));
304 }
305
306 // Late-binding agents not started via arguments
307 void Arguments::add_loaded_agent(AgentLibrary *agentLib) {
308 _agentList.add(agentLib);
309 }
310
311 void Arguments::add_loaded_agent(const char* name, char* options, bool absolute_path, void* os_lib) {
312 _agentList.add(new AgentLibrary(name, options, absolute_path, os_lib));
313 }
314
315 // Return TRUE if option matches 'property', or 'property=', or 'property.'.
316 static bool matches_property_suffix(const char* option, const char* property, size_t len) {
317 return ((strncmp(option, property, len) == 0) &&
318 (option[len] == '=' || option[len] == '.' || option[len] == '\0'));
319 }
320
321 // Return true if property starts with "jdk.module." and its ensuing chars match
322 // any of the reserved module properties.
323 // property should be passed without the leading "-D".
324 bool Arguments::is_internal_module_property(const char* property) {
325 assert((strncmp(property, "-D", 2) != 0), "Unexpected leading -D");
326 if (strncmp(property, MODULE_PROPERTY_PREFIX, MODULE_PROPERTY_PREFIX_LEN) == 0) {
327 const char* property_suffix = property + MODULE_PROPERTY_PREFIX_LEN;
328 if (matches_property_suffix(property_suffix, ADDEXPORTS, ADDEXPORTS_LEN) ||
329 matches_property_suffix(property_suffix, ADDREADS, ADDREADS_LEN) ||
330 matches_property_suffix(property_suffix, ADDOPENS, ADDOPENS_LEN) ||
331 matches_property_suffix(property_suffix, PATCH, PATCH_LEN) ||
332 matches_property_suffix(property_suffix, ADDMODS, ADDMODS_LEN) ||
333 matches_property_suffix(property_suffix, LIMITMODS, LIMITMODS_LEN) ||
334 matches_property_suffix(property_suffix, PATH, PATH_LEN) ||
335 matches_property_suffix(property_suffix, UPGRADE_PATH, UPGRADE_PATH_LEN)) {
336 return true;
337 }
338 }
339 return false;
340 }
341
342 // Process java launcher properties.
343 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) {
344 // See if sun.java.launcher, sun.java.launcher.is_altjvm or
345 // sun.java.launcher.pid is defined.
346 // Must do this before setting up other system properties,
347 // as some of them may depend on launcher type.
348 for (int index = 0; index < args->nOptions; index++) {
349 const JavaVMOption* option = args->options + index;
350 const char* tail;
351
352 if (match_option(option, "-Dsun.java.launcher=", &tail)) {
353 process_java_launcher_argument(tail, option->extraInfo);
354 continue;
355 }
356 if (match_option(option, "-Dsun.java.launcher.is_altjvm=", &tail)) {
357 if (strcmp(tail, "true") == 0) {
358 _sun_java_launcher_is_altjvm = true;
359 }
360 continue;
361 }
362 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) {
363 _sun_java_launcher_pid = atoi(tail);
364 continue;
365 }
366 }
367 }
368
369 // Initialize system properties key and value.
370 void Arguments::init_system_properties() {
371
372 // Set up _system_boot_class_path which is not a property but
373 // relies heavily on argument processing and the jdk.boot.class.path.append
374 // property. It is used to store the underlying system boot class path.
375 _system_boot_class_path = new PathString(NULL);
376
377 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name",
378 "Java Virtual Machine Specification", false));
379 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false));
380 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false));
381 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true));
382 PropertyList_add(&_system_properties, new SystemProperty("jdk.debug", VM_Version::jdk_debug_level(), false));
383
384 // Following are JVMTI agent writable properties.
385 // Properties values are set to NULL and they are
386 // os specific they are initialized in os::init_system_properties_values().
387 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true);
388 _java_library_path = new SystemProperty("java.library.path", NULL, true);
389 _java_home = new SystemProperty("java.home", NULL, true);
390 _java_class_path = new SystemProperty("java.class.path", "", true);
391 // jdk.boot.class.path.append is a non-writeable, internal property.
392 // It can only be set by either:
393 // - -Xbootclasspath/a:
394 // - AddToBootstrapClassLoaderSearch during JVMTI OnLoad phase
395 _jdk_boot_class_path_append = new SystemProperty("jdk.boot.class.path.append", "", false, true);
396
397 // Add to System Property list.
398 PropertyList_add(&_system_properties, _sun_boot_library_path);
399 PropertyList_add(&_system_properties, _java_library_path);
400 PropertyList_add(&_system_properties, _java_home);
401 PropertyList_add(&_system_properties, _java_class_path);
402 PropertyList_add(&_system_properties, _jdk_boot_class_path_append);
403
404 // Set OS specific system properties values
405 os::init_system_properties_values();
406 }
407
408 // Update/Initialize System properties after JDK version number is known
409 void Arguments::init_version_specific_system_properties() {
410 enum { bufsz = 16 };
411 char buffer[bufsz];
412 const char* spec_vendor = "Oracle Corporation";
413 uint32_t spec_version = JDK_Version::current().major_version();
414
415 jio_snprintf(buffer, bufsz, UINT32_FORMAT, spec_version);
416
417 PropertyList_add(&_system_properties,
418 new SystemProperty("java.vm.specification.vendor", spec_vendor, false));
419 PropertyList_add(&_system_properties,
420 new SystemProperty("java.vm.specification.version", buffer, false));
421 PropertyList_add(&_system_properties,
422 new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false));
423 }
424
425 /*
426 * -XX argument processing:
427 *
428 * -XX arguments are defined in several places, such as:
429 * globals.hpp, globals_<cpu>.hpp, globals_<os>.hpp, <compiler>_globals.hpp, or <gc>_globals.hpp.
430 * -XX arguments are parsed in parse_argument().
431 * -XX argument bounds checking is done in check_vm_args_consistency().
432 *
433 * Over time -XX arguments may change. There are mechanisms to handle common cases:
434 *
435 * ALIASED: An option that is simply another name for another option. This is often
436 * part of the process of deprecating a flag, but not all aliases need
437 * to be deprecated.
438 *
439 * Create an alias for an option by adding the old and new option names to the
440 * "aliased_jvm_flags" table. Delete the old variable from globals.hpp (etc).
441 *
442 * DEPRECATED: An option that is supported, but a warning is printed to let the user know that
443 * support may be removed in the future. Both regular and aliased options may be
444 * deprecated.
445 *
446 * Add a deprecation warning for an option (or alias) by adding an entry in the
447 * "special_jvm_flags" table and setting the "deprecated_in" field.
448 * Often an option "deprecated" in one major release will
449 * be made "obsolete" in the next. In this case the entry should also have its
450 * "obsolete_in" field set.
451 *
452 * OBSOLETE: An option that has been removed (and deleted from globals.hpp), but is still accepted
453 * on the command line. A warning is printed to let the user know that option might not
454 * be accepted in the future.
455 *
456 * Add an obsolete warning for an option by adding an entry in the "special_jvm_flags"
457 * table and setting the "obsolete_in" field.
458 *
459 * EXPIRED: A deprecated or obsolete option that has an "accept_until" version less than or equal
460 * to the current JDK version. The system will flatly refuse to admit the existence of
461 * the flag. This allows a flag to die automatically over JDK releases.
462 *
463 * Note that manual cleanup of expired options should be done at major JDK version upgrades:
464 * - Newly expired options should be removed from the special_jvm_flags and aliased_jvm_flags tables.
465 * - Newly obsolete or expired deprecated options should have their global variable
466 * definitions removed (from globals.hpp, etc) and related implementations removed.
467 *
468 * Recommended approach for removing options:
469 *
470 * To remove options commonly used by customers (e.g. product, commercial -XX options), use
471 * the 3-step model adding major release numbers to the deprecate, obsolete and expire columns.
472 *
473 * To remove internal options (e.g. diagnostic, experimental, develop options), use
474 * a 2-step model adding major release numbers to the obsolete and expire columns.
475 *
476 * To change the name of an option, use the alias table as well as a 2-step
477 * model adding major release numbers to the deprecate and expire columns.
478 * Think twice about aliasing commonly used customer options.
479 *
480 * There are times when it is appropriate to leave a future release number as undefined.
481 *
482 * Tests: Aliases should be tested in VMAliasOptions.java.
483 * Deprecated options should be tested in VMDeprecatedOptions.java.
484 */
485
486 // The special_jvm_flags table declares options that are being deprecated and/or obsoleted. The
487 // "deprecated_in" or "obsolete_in" fields may be set to "undefined", but not both.
488 // When the JDK version reaches 'deprecated_in' limit, the JVM will process this flag on
489 // the command-line as usual, but will issue a warning.
490 // When the JDK version reaches 'obsolete_in' limit, the JVM will continue accepting this flag on
491 // the command-line, while issuing a warning and ignoring the flag value.
492 // Once the JDK version reaches 'expired_in' limit, the JVM will flatly refuse to admit the
493 // existence of the flag.
494 //
495 // MANUAL CLEANUP ON JDK VERSION UPDATES:
496 // This table ensures that the handling of options will update automatically when the JDK
497 // version is incremented, but the source code needs to be cleanup up manually:
498 // - As "deprecated" options age into "obsolete" or "expired" options, the associated "globals"
499 // variable should be removed, as well as users of the variable.
500 // - As "deprecated" options age into "obsolete" options, move the entry into the
501 // "Obsolete Flags" section of the table.
502 // - All expired options should be removed from the table.
503 static SpecialFlag const special_jvm_flags[] = {
504 // -------------- Deprecated Flags --------------
505 // --- Non-alias flags - sorted by obsolete_in then expired_in:
506 { "MaxGCMinorPauseMillis", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() },
507 { "UseConcMarkSweepGC", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
508 { "AssumeMP", JDK_Version::jdk(10),JDK_Version::undefined(), JDK_Version::undefined() },
509 { "MonitorInUseLists", JDK_Version::jdk(10),JDK_Version::undefined(), JDK_Version::undefined() },
510 { "MaxRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
511 { "MinRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
512 { "InitialRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
513 { "UseMembar", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
514 { "IgnoreUnverifiableClassesDuringDump", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
515 { "CompilerThreadHintNoPreempt", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
516 { "VMThreadHintNoPreempt", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
517 { "PrintSafepointStatistics", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
518 { "PrintSafepointStatisticsTimeout", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
519 { "PrintSafepointStatisticsCount",JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
520 { "AggressiveOpts", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
521
522 // --- Deprecated alias flags (see also aliased_jvm_flags) - sorted by obsolete_in then expired_in:
523 { "DefaultMaxRAMFraction", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() },
524 { "CreateMinidumpOnCrash", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
525 { "MustCallLoadClassInternal", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
526 { "UnsyncloadClass", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
527
528 // -------------- Obsolete Flags - sorted by expired_in --------------
529 { "ConvertSleepToYield", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) },
530 { "ConvertYieldToSleep", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) },
531 { "MinSleepInterval", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) },
532 { "CheckAssertionStatusDirectives",JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
533 { "PrintMallocFree", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
534 { "PrintMalloc", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
535 { "ShowSafepointMsgs", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
536 { "FastTLABRefill", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
537 { "SafepointSpinBeforeYield", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
538 { "CheckEndorsedAndExtDirs", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
539 { "DeferThrSuspendLoopCount", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
540 { "DeferPollingPageLoopCount", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
541 { "PermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::undefined() },
542 { "MaxPermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::undefined() },
543 { "SharedReadWriteSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() },
544 { "SharedReadOnlySize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() },
545 { "SharedMiscDataSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() },
546 { "SharedMiscCodeSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() },
547 { "UseUTCFileTimestamp", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
548 { "UseAppCDS", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
549
550 #ifdef TEST_VERIFY_SPECIAL_JVM_FLAGS
551 { "dep > obs", JDK_Version::jdk(9), JDK_Version::jdk(8), JDK_Version::undefined() },
552 { "dep > exp ", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(8) },
553 { "obs > exp ", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(8) },
554 { "not deprecated or obsolete", JDK_Version::undefined(), JDK_Version::undefined(), JDK_Version::jdk(9) },
555 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
556 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
557 { "BytecodeVerificationRemote", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::undefined() },
558 #endif
559
560 { NULL, JDK_Version(0), JDK_Version(0) }
561 };
562
563 // Flags that are aliases for other flags.
564 typedef struct {
565 const char* alias_name;
566 const char* real_name;
567 } AliasedFlag;
568
569 static AliasedFlag const aliased_jvm_flags[] = {
570 { "DefaultMaxRAMFraction", "MaxRAMFraction" },
571 { "CreateMinidumpOnCrash", "CreateCoredumpOnCrash" },
572 { NULL, NULL}
573 };
574
575 // NOTE: A compatibility request will be necessary for each alias to be removed.
576 static AliasedLoggingFlag const aliased_logging_flags[] = {
577 { "PrintCompressedOopsMode", LogLevel::Info, true, LOG_TAGS(gc, heap, coops) },
578 { "PrintSharedSpaces", LogLevel::Info, true, LOG_TAGS(cds) },
579 { "TraceBiasedLocking", LogLevel::Info, true, LOG_TAGS(biasedlocking) },
580 { "TraceClassLoading", LogLevel::Info, true, LOG_TAGS(class, load) },
581 { "TraceClassLoadingPreorder", LogLevel::Debug, true, LOG_TAGS(class, preorder) },
582 { "TraceClassPaths", LogLevel::Info, true, LOG_TAGS(class, path) },
583 { "TraceClassResolution", LogLevel::Debug, true, LOG_TAGS(class, resolve) },
584 { "TraceClassUnloading", LogLevel::Info, true, LOG_TAGS(class, unload) },
585 { "TraceExceptions", LogLevel::Info, true, LOG_TAGS(exceptions) },
586 { "TraceLoaderConstraints", LogLevel::Info, true, LOG_TAGS(class, loader, constraints) },
587 { "TraceMonitorInflation", LogLevel::Debug, true, LOG_TAGS(monitorinflation) },
588 { "TraceSafepointCleanupTime", LogLevel::Info, true, LOG_TAGS(safepoint, cleanup) },
589 { "TraceJVMTIObjectTagging", LogLevel::Debug, true, LOG_TAGS(jvmti, objecttagging) },
590 { "TraceRedefineClasses", LogLevel::Info, false, LOG_TAGS(redefine, class) },
591 { NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG) }
592 };
593
594 #ifndef PRODUCT
595 // These options are removed in jdk9. Remove this code for jdk10.
596 static AliasedFlag const removed_develop_logging_flags[] = {
597 { "TraceClassInitialization", "-Xlog:class+init" },
598 { "TraceClassLoaderData", "-Xlog:class+loader+data" },
599 { "TraceDefaultMethods", "-Xlog:defaultmethods=debug" },
600 { "TraceItables", "-Xlog:itables=debug" },
601 { "TraceMonitorMismatch", "-Xlog:monitormismatch=info" },
602 { "TraceSafepoint", "-Xlog:safepoint=debug" },
603 { "TraceStartupTime", "-Xlog:startuptime" },
604 { "TraceVMOperation", "-Xlog:vmoperation=debug" },
605 { "PrintVtables", "-Xlog:vtables=debug" },
606 { "VerboseVerification", "-Xlog:verification" },
607 { NULL, NULL }
608 };
609 #endif //PRODUCT
610
611 // Return true if "v" is less than "other", where "other" may be "undefined".
612 static bool version_less_than(JDK_Version v, JDK_Version other) {
613 assert(!v.is_undefined(), "must be defined");
614 if (!other.is_undefined() && v.compare(other) >= 0) {
615 return false;
616 } else {
617 return true;
618 }
619 }
620
621 extern bool lookup_special_flag_ext(const char *flag_name, SpecialFlag& flag);
622
623 static bool lookup_special_flag(const char *flag_name, SpecialFlag& flag) {
624 // Allow extensions to have priority
625 if (lookup_special_flag_ext(flag_name, flag)) {
626 return true;
627 }
628
629 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
630 if ((strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
631 flag = special_jvm_flags[i];
632 return true;
633 }
634 }
635 return false;
636 }
637
638 bool Arguments::is_obsolete_flag(const char *flag_name, JDK_Version* version) {
639 assert(version != NULL, "Must provide a version buffer");
640 SpecialFlag flag;
641 if (lookup_special_flag(flag_name, flag)) {
642 if (!flag.obsolete_in.is_undefined()) {
643 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) {
644 *version = flag.obsolete_in;
645 return true;
646 }
647 }
648 }
649 return false;
650 }
651
652 int Arguments::is_deprecated_flag(const char *flag_name, JDK_Version* version) {
653 assert(version != NULL, "Must provide a version buffer");
654 SpecialFlag flag;
655 if (lookup_special_flag(flag_name, flag)) {
656 if (!flag.deprecated_in.is_undefined()) {
657 if (version_less_than(JDK_Version::current(), flag.obsolete_in) &&
658 version_less_than(JDK_Version::current(), flag.expired_in)) {
659 *version = flag.deprecated_in;
660 return 1;
661 } else {
662 return -1;
663 }
664 }
665 }
666 return 0;
667 }
668
669 #ifndef PRODUCT
670 const char* Arguments::removed_develop_logging_flag_name(const char* name){
671 for (size_t i = 0; removed_develop_logging_flags[i].alias_name != NULL; i++) {
672 const AliasedFlag& flag = removed_develop_logging_flags[i];
673 if (strcmp(flag.alias_name, name) == 0) {
674 return flag.real_name;
675 }
676 }
677 return NULL;
678 }
679 #endif // PRODUCT
680
681 const char* Arguments::real_flag_name(const char *flag_name) {
682 for (size_t i = 0; aliased_jvm_flags[i].alias_name != NULL; i++) {
683 const AliasedFlag& flag_status = aliased_jvm_flags[i];
684 if (strcmp(flag_status.alias_name, flag_name) == 0) {
685 return flag_status.real_name;
686 }
687 }
688 return flag_name;
689 }
690
691 #ifdef ASSERT
692 static bool lookup_special_flag(const char *flag_name, size_t skip_index) {
693 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
694 if ((i != skip_index) && (strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
695 return true;
696 }
697 }
698 return false;
699 }
700
701 // Verifies the correctness of the entries in the special_jvm_flags table.
702 // If there is a semantic error (i.e. a bug in the table) such as the obsoletion
703 // version being earlier than the deprecation version, then a warning is issued
704 // and verification fails - by returning false. If it is detected that the table
705 // is out of date, with respect to the current version, then a warning is issued
706 // but verification does not fail. This allows the VM to operate when the version
707 // is first updated, without needing to update all the impacted flags at the
708 // same time.
709 static bool verify_special_jvm_flags() {
710 bool success = true;
711 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
712 const SpecialFlag& flag = special_jvm_flags[i];
713 if (lookup_special_flag(flag.name, i)) {
714 warning("Duplicate special flag declaration \"%s\"", flag.name);
715 success = false;
716 }
717 if (flag.deprecated_in.is_undefined() &&
718 flag.obsolete_in.is_undefined()) {
719 warning("Special flag entry \"%s\" must declare version deprecated and/or obsoleted in.", flag.name);
720 success = false;
721 }
722
723 if (!flag.deprecated_in.is_undefined()) {
724 if (!version_less_than(flag.deprecated_in, flag.obsolete_in)) {
725 warning("Special flag entry \"%s\" must be deprecated before obsoleted.", flag.name);
726 success = false;
727 }
728
729 if (!version_less_than(flag.deprecated_in, flag.expired_in)) {
730 warning("Special flag entry \"%s\" must be deprecated before expired.", flag.name);
731 success = false;
732 }
733 }
734
735 if (!flag.obsolete_in.is_undefined()) {
736 if (!version_less_than(flag.obsolete_in, flag.expired_in)) {
737 warning("Special flag entry \"%s\" must be obsoleted before expired.", flag.name);
738 success = false;
739 }
740
741 // if flag has become obsolete it should not have a "globals" flag defined anymore.
742 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) {
743 if (Flag::find_flag(flag.name) != NULL) {
744 // Temporarily disable the warning: 8196739
745 // warning("Global variable for obsolete special flag entry \"%s\" should be removed", flag.name);
746 }
747 }
748 }
749
750 if (!flag.expired_in.is_undefined()) {
751 // if flag has become expired it should not have a "globals" flag defined anymore.
752 if (!version_less_than(JDK_Version::current(), flag.expired_in)) {
753 if (Flag::find_flag(flag.name) != NULL) {
754 // Temporarily disable the warning: 8196739
755 // warning("Global variable for expired flag entry \"%s\" should be removed", flag.name);
756 }
757 }
758 }
759
760 }
761 return success;
762 }
763 #endif
764
765 // Parses a size specification string.
766 bool Arguments::atojulong(const char *s, julong* result) {
767 julong n = 0;
768
769 // First char must be a digit. Don't allow negative numbers or leading spaces.
770 if (!isdigit(*s)) {
771 return false;
772 }
773
774 bool is_hex = (s[0] == '0' && (s[1] == 'x' || s[1] == 'X'));
775 char* remainder;
776 errno = 0;
777 n = strtoull(s, &remainder, (is_hex ? 16 : 10));
778 if (errno != 0) {
779 return false;
780 }
781
782 // Fail if no number was read at all or if the remainder contains more than a single non-digit character.
783 if (remainder == s || strlen(remainder) > 1) {
784 return false;
785 }
786
787 switch (*remainder) {
788 case 'T': case 't':
789 *result = n * G * K;
790 // Check for overflow.
791 if (*result/((julong)G * K) != n) return false;
792 return true;
793 case 'G': case 'g':
794 *result = n * G;
795 if (*result/G != n) return false;
796 return true;
797 case 'M': case 'm':
798 *result = n * M;
799 if (*result/M != n) return false;
800 return true;
801 case 'K': case 'k':
802 *result = n * K;
803 if (*result/K != n) return false;
804 return true;
805 case '\0':
806 *result = n;
807 return true;
808 default:
809 return false;
810 }
811 }
812
813 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size, julong max_size) {
814 if (size < min_size) return arg_too_small;
815 if (size > max_size) return arg_too_big;
816 return arg_in_range;
817 }
818
819 // Describe an argument out of range error
820 void Arguments::describe_range_error(ArgsRange errcode) {
821 switch(errcode) {
822 case arg_too_big:
823 jio_fprintf(defaultStream::error_stream(),
824 "The specified size exceeds the maximum "
825 "representable size.\n");
826 break;
827 case arg_too_small:
828 case arg_unreadable:
829 case arg_in_range:
830 // do nothing for now
831 break;
832 default:
833 ShouldNotReachHere();
834 }
835 }
836
837 static bool set_bool_flag(const char* name, bool value, Flag::Flags origin) {
838 if (CommandLineFlags::boolAtPut(name, &value, origin) == Flag::SUCCESS) {
839 return true;
840 } else {
841 return false;
842 }
843 }
844
845 static bool set_fp_numeric_flag(const char* name, char* value, Flag::Flags origin) {
846 char* end;
847 errno = 0;
848 double v = strtod(value, &end);
849 if ((errno != 0) || (*end != 0)) {
850 return false;
851 }
852
853 if (CommandLineFlags::doubleAtPut(name, &v, origin) == Flag::SUCCESS) {
854 return true;
855 }
856 return false;
857 }
858
859 static bool set_numeric_flag(const char* name, char* value, Flag::Flags origin) {
860 julong v;
861 int int_v;
862 intx intx_v;
863 bool is_neg = false;
864 Flag* result = Flag::find_flag(name, strlen(name));
865
866 if (result == NULL) {
867 return false;
868 }
869
870 // Check the sign first since atojulong() parses only unsigned values.
871 if (*value == '-') {
872 if (!result->is_intx() && !result->is_int()) {
873 return false;
874 }
875 value++;
876 is_neg = true;
877 }
878 if (!Arguments::atojulong(value, &v)) {
879 return false;
880 }
881 if (result->is_int()) {
882 int_v = (int) v;
883 if (is_neg) {
884 int_v = -int_v;
885 }
886 return CommandLineFlags::intAtPut(result, &int_v, origin) == Flag::SUCCESS;
887 } else if (result->is_uint()) {
888 uint uint_v = (uint) v;
889 return CommandLineFlags::uintAtPut(result, &uint_v, origin) == Flag::SUCCESS;
890 } else if (result->is_intx()) {
891 intx_v = (intx) v;
892 if (is_neg) {
893 intx_v = -intx_v;
894 }
895 return CommandLineFlags::intxAtPut(result, &intx_v, origin) == Flag::SUCCESS;
896 } else if (result->is_uintx()) {
897 uintx uintx_v = (uintx) v;
898 return CommandLineFlags::uintxAtPut(result, &uintx_v, origin) == Flag::SUCCESS;
899 } else if (result->is_uint64_t()) {
900 uint64_t uint64_t_v = (uint64_t) v;
901 return CommandLineFlags::uint64_tAtPut(result, &uint64_t_v, origin) == Flag::SUCCESS;
902 } else if (result->is_size_t()) {
903 size_t size_t_v = (size_t) v;
904 return CommandLineFlags::size_tAtPut(result, &size_t_v, origin) == Flag::SUCCESS;
905 } else if (result->is_double()) {
906 double double_v = (double) v;
907 return CommandLineFlags::doubleAtPut(result, &double_v, origin) == Flag::SUCCESS;
908 } else {
909 return false;
910 }
911 }
912
913 static bool set_string_flag(const char* name, const char* value, Flag::Flags origin) {
914 if (CommandLineFlags::ccstrAtPut(name, &value, origin) != Flag::SUCCESS) return false;
915 // Contract: CommandLineFlags always returns a pointer that needs freeing.
916 FREE_C_HEAP_ARRAY(char, value);
917 return true;
918 }
919
920 static bool append_to_string_flag(const char* name, const char* new_value, Flag::Flags origin) {
921 const char* old_value = "";
922 if (CommandLineFlags::ccstrAt(name, &old_value) != Flag::SUCCESS) return false;
923 size_t old_len = old_value != NULL ? strlen(old_value) : 0;
924 size_t new_len = strlen(new_value);
925 const char* value;
926 char* free_this_too = NULL;
927 if (old_len == 0) {
928 value = new_value;
929 } else if (new_len == 0) {
930 value = old_value;
931 } else {
932 size_t length = old_len + 1 + new_len + 1;
933 char* buf = NEW_C_HEAP_ARRAY(char, length, mtArguments);
934 // each new setting adds another LINE to the switch:
935 jio_snprintf(buf, length, "%s\n%s", old_value, new_value);
936 value = buf;
937 free_this_too = buf;
938 }
939 (void) CommandLineFlags::ccstrAtPut(name, &value, origin);
940 // CommandLineFlags always returns a pointer that needs freeing.
941 FREE_C_HEAP_ARRAY(char, value);
942 if (free_this_too != NULL) {
943 // CommandLineFlags made its own copy, so I must delete my own temp. buffer.
944 FREE_C_HEAP_ARRAY(char, free_this_too);
945 }
946 return true;
947 }
948
949 const char* Arguments::handle_aliases_and_deprecation(const char* arg, bool warn) {
950 const char* real_name = real_flag_name(arg);
951 JDK_Version since = JDK_Version();
952 switch (is_deprecated_flag(arg, &since)) {
953 case -1:
954 return NULL; // obsolete or expired, don't process normally
955 case 0:
956 return real_name;
957 case 1: {
958 if (warn) {
959 char version[256];
960 since.to_string(version, sizeof(version));
961 if (real_name != arg) {
962 warning("Option %s was deprecated in version %s and will likely be removed in a future release. Use option %s instead.",
963 arg, version, real_name);
964 } else {
965 warning("Option %s was deprecated in version %s and will likely be removed in a future release.",
966 arg, version);
967 }
968 }
969 return real_name;
970 }
971 }
972 ShouldNotReachHere();
973 return NULL;
974 }
975
976 void log_deprecated_flag(const char* name, bool on, AliasedLoggingFlag alf) {
977 LogTagType tagSet[] = {alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5};
978 // Set tagset string buffer at max size of 256, large enough for any alias tagset
979 const int max_tagset_size = 256;
980 int max_tagset_len = max_tagset_size - 1;
981 char tagset_buffer[max_tagset_size];
982 tagset_buffer[0] = '\0';
983
984 // Write tag-set for aliased logging option, in string list form
985 int max_tags = sizeof(tagSet)/sizeof(tagSet[0]);
986 for (int i = 0; i < max_tags && tagSet[i] != LogTag::__NO_TAG; i++) {
987 if (i > 0) {
988 strncat(tagset_buffer, "+", max_tagset_len - strlen(tagset_buffer));
989 }
990 strncat(tagset_buffer, LogTag::name(tagSet[i]), max_tagset_len - strlen(tagset_buffer));
991 }
992 if (!alf.exactMatch) {
993 strncat(tagset_buffer, "*", max_tagset_len - strlen(tagset_buffer));
994 }
995 log_warning(arguments)("-XX:%s%s is deprecated. Will use -Xlog:%s=%s instead.",
996 (on) ? "+" : "-",
997 name,
998 tagset_buffer,
999 (on) ? LogLevel::name(alf.level) : "off");
1000 }
1001
1002 AliasedLoggingFlag Arguments::catch_logging_aliases(const char* name, bool on){
1003 for (size_t i = 0; aliased_logging_flags[i].alias_name != NULL; i++) {
1004 const AliasedLoggingFlag& alf = aliased_logging_flags[i];
1005 if (strcmp(alf.alias_name, name) == 0) {
1006 log_deprecated_flag(name, on, alf);
1007 return alf;
1008 }
1009 }
1010 AliasedLoggingFlag a = {NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG)};
1011 return a;
1012 }
1013
1014 bool Arguments::parse_argument(const char* arg, Flag::Flags origin) {
1015
1016 // range of acceptable characters spelled out for portability reasons
1017 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]"
1018 #define BUFLEN 255
1019 char name[BUFLEN+1];
1020 char dummy;
1021 const char* real_name;
1022 bool warn_if_deprecated = true;
1023
1024 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
1025 AliasedLoggingFlag alf = catch_logging_aliases(name, false);
1026 if (alf.alias_name != NULL){
1027 LogConfiguration::configure_stdout(LogLevel::Off, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
1028 return true;
1029 }
1030 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1031 if (real_name == NULL) {
1032 return false;
1033 }
1034 return set_bool_flag(real_name, false, origin);
1035 }
1036 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
1037 AliasedLoggingFlag alf = catch_logging_aliases(name, true);
1038 if (alf.alias_name != NULL){
1039 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
1040 return true;
1041 }
1042 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1043 if (real_name == NULL) {
1044 return false;
1045 }
1046 return set_bool_flag(real_name, true, origin);
1047 }
1048
1049 char punct;
1050 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') {
1051 const char* value = strchr(arg, '=') + 1;
1052 Flag* flag;
1053
1054 // this scanf pattern matches both strings (handled here) and numbers (handled later))
1055 AliasedLoggingFlag alf = catch_logging_aliases(name, true);
1056 if (alf.alias_name != NULL) {
1057 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
1058 return true;
1059 }
1060 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1061 if (real_name == NULL) {
1062 return false;
1063 }
1064 flag = Flag::find_flag(real_name);
1065 if (flag != NULL && flag->is_ccstr()) {
1066 if (flag->ccstr_accumulates()) {
1067 return append_to_string_flag(real_name, value, origin);
1068 } else {
1069 if (value[0] == '\0') {
1070 value = NULL;
1071 }
1072 return set_string_flag(real_name, value, origin);
1073 }
1074 } else {
1075 warn_if_deprecated = false; // if arg is deprecated, we've already done warning...
1076 }
1077 }
1078
1079 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') {
1080 const char* value = strchr(arg, '=') + 1;
1081 // -XX:Foo:=xxx will reset the string flag to the given value.
1082 if (value[0] == '\0') {
1083 value = NULL;
1084 }
1085 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1086 if (real_name == NULL) {
1087 return false;
1088 }
1089 return set_string_flag(real_name, value, origin);
1090 }
1091
1092 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.eE+]"
1093 #define SIGNED_NUMBER_RANGE "[-0123456789]"
1094 #define NUMBER_RANGE "[0123456789eE+-]"
1095 char value[BUFLEN + 1];
1096 char value2[BUFLEN + 1];
1097 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) {
1098 // Looks like a floating-point number -- try again with more lenient format string
1099 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) {
1100 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1101 if (real_name == NULL) {
1102 return false;
1103 }
1104 return set_fp_numeric_flag(real_name, value, origin);
1105 }
1106 }
1107
1108 #define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]"
1109 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) {
1110 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1111 if (real_name == NULL) {
1112 return false;
1113 }
1114 return set_numeric_flag(real_name, value, origin);
1115 }
1116
1117 return false;
1118 }
1119
1120 void Arguments::add_string(char*** bldarray, int* count, const char* arg) {
1121 assert(bldarray != NULL, "illegal argument");
1122
1123 if (arg == NULL) {
1124 return;
1125 }
1126
1127 int new_count = *count + 1;
1128
1129 // expand the array and add arg to the last element
1130 if (*bldarray == NULL) {
1131 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtArguments);
1132 } else {
1133 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtArguments);
1134 }
1135 (*bldarray)[*count] = os::strdup_check_oom(arg);
1136 *count = new_count;
1137 }
1138
1139 void Arguments::build_jvm_args(const char* arg) {
1140 add_string(&_jvm_args_array, &_num_jvm_args, arg);
1141 }
1142
1143 void Arguments::build_jvm_flags(const char* arg) {
1144 add_string(&_jvm_flags_array, &_num_jvm_flags, arg);
1145 }
1146
1147 // utility function to return a string that concatenates all
1148 // strings in a given char** array
1149 const char* Arguments::build_resource_string(char** args, int count) {
1150 if (args == NULL || count == 0) {
1151 return NULL;
1152 }
1153 size_t length = 0;
1154 for (int i = 0; i < count; i++) {
1155 length += strlen(args[i]) + 1; // add 1 for a space or NULL terminating character
1156 }
1157 char* s = NEW_RESOURCE_ARRAY(char, length);
1158 char* dst = s;
1159 for (int j = 0; j < count; j++) {
1160 size_t offset = strlen(args[j]) + 1; // add 1 for a space or NULL terminating character
1161 jio_snprintf(dst, length, "%s ", args[j]); // jio_snprintf will replace the last space character with NULL character
1162 dst += offset;
1163 length -= offset;
1164 }
1165 return (const char*) s;
1166 }
1167
1168 void Arguments::print_on(outputStream* st) {
1169 st->print_cr("VM Arguments:");
1170 if (num_jvm_flags() > 0) {
1171 st->print("jvm_flags: "); print_jvm_flags_on(st);
1172 st->cr();
1173 }
1174 if (num_jvm_args() > 0) {
1175 st->print("jvm_args: "); print_jvm_args_on(st);
1176 st->cr();
1177 }
1178 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>");
1179 if (_java_class_path != NULL) {
1180 char* path = _java_class_path->value();
1181 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path );
1182 }
1183 st->print_cr("Launcher Type: %s", _sun_java_launcher);
1184 }
1185
1186 void Arguments::print_summary_on(outputStream* st) {
1187 // Print the command line. Environment variables that are helpful for
1188 // reproducing the problem are written later in the hs_err file.
1189 // flags are from setting file
1190 if (num_jvm_flags() > 0) {
1191 st->print_raw("Settings File: ");
1192 print_jvm_flags_on(st);
1193 st->cr();
1194 }
1195 // args are the command line and environment variable arguments.
1196 st->print_raw("Command Line: ");
1197 if (num_jvm_args() > 0) {
1198 print_jvm_args_on(st);
1199 }
1200 // this is the classfile and any arguments to the java program
1201 if (java_command() != NULL) {
1202 st->print("%s", java_command());
1203 }
1204 st->cr();
1205 }
1206
1207 void Arguments::print_jvm_flags_on(outputStream* st) {
1208 if (_num_jvm_flags > 0) {
1209 for (int i=0; i < _num_jvm_flags; i++) {
1210 st->print("%s ", _jvm_flags_array[i]);
1211 }
1212 }
1213 }
1214
1215 void Arguments::print_jvm_args_on(outputStream* st) {
1216 if (_num_jvm_args > 0) {
1217 for (int i=0; i < _num_jvm_args; i++) {
1218 st->print("%s ", _jvm_args_array[i]);
1219 }
1220 }
1221 }
1222
1223 bool Arguments::process_argument(const char* arg,
1224 jboolean ignore_unrecognized,
1225 Flag::Flags origin) {
1226 JDK_Version since = JDK_Version();
1227
1228 if (parse_argument(arg, origin)) {
1229 return true;
1230 }
1231
1232 // Determine if the flag has '+', '-', or '=' characters.
1233 bool has_plus_minus = (*arg == '+' || *arg == '-');
1234 const char* const argname = has_plus_minus ? arg + 1 : arg;
1235
1236 size_t arg_len;
1237 const char* equal_sign = strchr(argname, '=');
1238 if (equal_sign == NULL) {
1239 arg_len = strlen(argname);
1240 } else {
1241 arg_len = equal_sign - argname;
1242 }
1243
1244 // Only make the obsolete check for valid arguments.
1245 if (arg_len <= BUFLEN) {
1246 // Construct a string which consists only of the argument name without '+', '-', or '='.
1247 char stripped_argname[BUFLEN+1]; // +1 for '\0'
1248 jio_snprintf(stripped_argname, arg_len+1, "%s", argname); // +1 for '\0'
1249 if (is_obsolete_flag(stripped_argname, &since)) {
1250 char version[256];
1251 since.to_string(version, sizeof(version));
1252 warning("Ignoring option %s; support was removed in %s", stripped_argname, version);
1253 return true;
1254 }
1255 #ifndef PRODUCT
1256 else {
1257 const char* replacement;
1258 if ((replacement = removed_develop_logging_flag_name(stripped_argname)) != NULL){
1259 log_warning(arguments)("%s has been removed. Please use %s instead.",
1260 stripped_argname,
1261 replacement);
1262 return false;
1263 }
1264 }
1265 #endif //PRODUCT
1266 }
1267
1268 // For locked flags, report a custom error message if available.
1269 // Otherwise, report the standard unrecognized VM option.
1270 Flag* found_flag = Flag::find_flag((const char*)argname, arg_len, true, true);
1271 if (found_flag != NULL) {
1272 char locked_message_buf[BUFLEN];
1273 Flag::MsgType msg_type = found_flag->get_locked_message(locked_message_buf, BUFLEN);
1274 if (strlen(locked_message_buf) == 0) {
1275 if (found_flag->is_bool() && !has_plus_minus) {
1276 jio_fprintf(defaultStream::error_stream(),
1277 "Missing +/- setting for VM option '%s'\n", argname);
1278 } else if (!found_flag->is_bool() && has_plus_minus) {
1279 jio_fprintf(defaultStream::error_stream(),
1280 "Unexpected +/- setting in VM option '%s'\n", argname);
1281 } else {
1282 jio_fprintf(defaultStream::error_stream(),
1283 "Improperly specified VM option '%s'\n", argname);
1284 }
1285 } else {
1286 #ifdef PRODUCT
1287 bool mismatched = ((msg_type == Flag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD) ||
1288 (msg_type == Flag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD));
1289 if (ignore_unrecognized && mismatched) {
1290 return true;
1291 }
1292 #endif
1293 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf);
1294 }
1295 } else {
1296 if (ignore_unrecognized) {
1297 return true;
1298 }
1299 jio_fprintf(defaultStream::error_stream(),
1300 "Unrecognized VM option '%s'\n", argname);
1301 Flag* fuzzy_matched = Flag::fuzzy_match((const char*)argname, arg_len, true);
1302 if (fuzzy_matched != NULL) {
1303 jio_fprintf(defaultStream::error_stream(),
1304 "Did you mean '%s%s%s'? ",
1305 (fuzzy_matched->is_bool()) ? "(+/-)" : "",
1306 fuzzy_matched->_name,
1307 (fuzzy_matched->is_bool()) ? "" : "=<value>");
1308 }
1309 }
1310
1311 // allow for commandline "commenting out" options like -XX:#+Verbose
1312 return arg[0] == '#';
1313 }
1314
1315 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) {
1316 FILE* stream = fopen(file_name, "rb");
1317 if (stream == NULL) {
1318 if (should_exist) {
1319 jio_fprintf(defaultStream::error_stream(),
1320 "Could not open settings file %s\n", file_name);
1321 return false;
1322 } else {
1323 return true;
1324 }
1325 }
1326
1327 char token[1024];
1328 int pos = 0;
1329
1330 bool in_white_space = true;
1331 bool in_comment = false;
1332 bool in_quote = false;
1333 char quote_c = 0;
1334 bool result = true;
1335
1336 int c = getc(stream);
1337 while(c != EOF && pos < (int)(sizeof(token)-1)) {
1338 if (in_white_space) {
1339 if (in_comment) {
1340 if (c == '\n') in_comment = false;
1341 } else {
1342 if (c == '#') in_comment = true;
1343 else if (!isspace(c)) {
1344 in_white_space = false;
1345 token[pos++] = c;
1346 }
1347 }
1348 } else {
1349 if (c == '\n' || (!in_quote && isspace(c))) {
1350 // token ends at newline, or at unquoted whitespace
1351 // this allows a way to include spaces in string-valued options
1352 token[pos] = '\0';
1353 logOption(token);
1354 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
1355 build_jvm_flags(token);
1356 pos = 0;
1357 in_white_space = true;
1358 in_quote = false;
1359 } else if (!in_quote && (c == '\'' || c == '"')) {
1360 in_quote = true;
1361 quote_c = c;
1362 } else if (in_quote && (c == quote_c)) {
1363 in_quote = false;
1364 } else {
1365 token[pos++] = c;
1366 }
1367 }
1368 c = getc(stream);
1369 }
1370 if (pos > 0) {
1371 token[pos] = '\0';
1372 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
1373 build_jvm_flags(token);
1374 }
1375 fclose(stream);
1376 return result;
1377 }
1378
1379 //=============================================================================================================
1380 // Parsing of properties (-D)
1381
1382 const char* Arguments::get_property(const char* key) {
1383 return PropertyList_get_value(system_properties(), key);
1384 }
1385
1386 bool Arguments::add_property(const char* prop, PropertyWriteable writeable, PropertyInternal internal) {
1387 const char* eq = strchr(prop, '=');
1388 const char* key;
1389 const char* value = "";
1390
1391 if (eq == NULL) {
1392 // property doesn't have a value, thus use passed string
1393 key = prop;
1394 } else {
1395 // property have a value, thus extract it and save to the
1396 // allocated string
1397 size_t key_len = eq - prop;
1398 char* tmp_key = AllocateHeap(key_len + 1, mtArguments);
1399
1400 jio_snprintf(tmp_key, key_len + 1, "%s", prop);
1401 key = tmp_key;
1402
1403 value = &prop[key_len + 1];
1404 }
1405
1406 if (strcmp(key, "java.compiler") == 0) {
1407 process_java_compiler_argument(value);
1408 // Record value in Arguments, but let it get passed to Java.
1409 } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 ||
1410 strcmp(key, "sun.java.launcher.pid") == 0) {
1411 // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are
1412 // private and are processed in process_sun_java_launcher_properties();
1413 // the sun.java.launcher property is passed on to the java application
1414 } else if (strcmp(key, "sun.boot.library.path") == 0) {
1415 // append is true, writable is true, internal is false
1416 PropertyList_unique_add(&_system_properties, key, value, AppendProperty,
1417 WriteableProperty, ExternalProperty);
1418 } else {
1419 if (strcmp(key, "sun.java.command") == 0) {
1420 char *old_java_command = _java_command;
1421 _java_command = os::strdup_check_oom(value, mtArguments);
1422 if (old_java_command != NULL) {
1423 os::free(old_java_command);
1424 }
1425 } else if (strcmp(key, "java.vendor.url.bug") == 0) {
1426 const char* old_java_vendor_url_bug = _java_vendor_url_bug;
1427 // save it in _java_vendor_url_bug, so JVM fatal error handler can access
1428 // its value without going through the property list or making a Java call.
1429 _java_vendor_url_bug = os::strdup_check_oom(value, mtArguments);
1430 if (old_java_vendor_url_bug != DEFAULT_VENDOR_URL_BUG) {
1431 assert(old_java_vendor_url_bug != NULL, "_java_vendor_url_bug is NULL");
1432 os::free((void *)old_java_vendor_url_bug);
1433 }
1434 }
1435
1436 // Create new property and add at the end of the list
1437 PropertyList_unique_add(&_system_properties, key, value, AddProperty, writeable, internal);
1438 }
1439
1440 if (key != prop) {
1441 // SystemProperty copy passed value, thus free previously allocated
1442 // memory
1443 FreeHeap((void *)key);
1444 }
1445
1446 return true;
1447 }
1448
1449 #if INCLUDE_CDS
1450 const char* unsupported_properties[] = { "jdk.module.limitmods",
1451 "jdk.module.upgrade.path",
1452 "jdk.module.patch.0" };
1453 const char* unsupported_options[] = { "--limit-modules",
1454 "--upgrade-module-path",
1455 "--patch-module"
1456 };
1457 void Arguments::check_unsupported_dumping_properties() {
1458 assert(DumpSharedSpaces, "this function is only used with -Xshare:dump");
1459 assert(ARRAY_SIZE(unsupported_properties) == ARRAY_SIZE(unsupported_options), "must be");
1460 // If a vm option is found in the unsupported_options array, vm will exit with an error message.
1461 SystemProperty* sp = system_properties();
1462 while (sp != NULL) {
1463 for (uint i = 0; i < ARRAY_SIZE(unsupported_properties); i++) {
1464 if (strcmp(sp->key(), unsupported_properties[i]) == 0) {
1465 vm_exit_during_initialization(
1466 "Cannot use the following option when dumping the shared archive", unsupported_options[i]);
1467 }
1468 }
1469 sp = sp->next();
1470 }
1471
1472 // Check for an exploded module build in use with -Xshare:dump.
1473 if (!has_jimage()) {
1474 vm_exit_during_initialization("Dumping the shared archive is not supported with an exploded module build");
1475 }
1476 }
1477
1478 bool Arguments::check_unsupported_cds_runtime_properties() {
1479 assert(UseSharedSpaces, "this function is only used with -Xshare:{on,auto}");
1480 assert(ARRAY_SIZE(unsupported_properties) == ARRAY_SIZE(unsupported_options), "must be");
1481 for (uint i = 0; i < ARRAY_SIZE(unsupported_properties); i++) {
1482 if (get_property(unsupported_properties[i]) != NULL) {
1483 if (RequireSharedSpaces) {
1484 warning("CDS is disabled when the %s option is specified.", unsupported_options[i]);
1485 }
1486 return true;
1487 }
1488 }
1489 return false;
1490 }
1491 #endif
1492
1493 //===========================================================================================================
1494 // Setting int/mixed/comp mode flags
1495
1496 void Arguments::set_mode_flags(Mode mode) {
1497 // Set up default values for all flags.
1498 // If you add a flag to any of the branches below,
1499 // add a default value for it here.
1500 set_java_compiler(false);
1501 _mode = mode;
1502
1503 // Ensure Agent_OnLoad has the correct initial values.
1504 // This may not be the final mode; mode may change later in onload phase.
1505 PropertyList_unique_add(&_system_properties, "java.vm.info",
1506 VM_Version::vm_info_string(), AddProperty, UnwriteableProperty, ExternalProperty);
1507
1508 UseInterpreter = true;
1509 UseCompiler = true;
1510 UseLoopCounter = true;
1511
1512 // Default values may be platform/compiler dependent -
1513 // use the saved values
1514 ClipInlining = Arguments::_ClipInlining;
1515 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods;
1516 UseOnStackReplacement = Arguments::_UseOnStackReplacement;
1517 BackgroundCompilation = Arguments::_BackgroundCompilation;
1518 if (TieredCompilation) {
1519 if (FLAG_IS_DEFAULT(Tier3InvokeNotifyFreqLog)) {
1520 Tier3InvokeNotifyFreqLog = Arguments::_Tier3InvokeNotifyFreqLog;
1521 }
1522 if (FLAG_IS_DEFAULT(Tier4InvocationThreshold)) {
1523 Tier4InvocationThreshold = Arguments::_Tier4InvocationThreshold;
1524 }
1525 }
1526
1527 // Change from defaults based on mode
1528 switch (mode) {
1529 default:
1530 ShouldNotReachHere();
1531 break;
1532 case _int:
1533 UseCompiler = false;
1534 UseLoopCounter = false;
1535 AlwaysCompileLoopMethods = false;
1536 UseOnStackReplacement = false;
1537 break;
1538 case _mixed:
1539 // same as default
1540 break;
1541 case _comp:
1542 UseInterpreter = false;
1543 BackgroundCompilation = false;
1544 ClipInlining = false;
1545 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more.
1546 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and
1547 // compile a level 4 (C2) and then continue executing it.
1548 if (TieredCompilation) {
1549 Tier3InvokeNotifyFreqLog = 0;
1550 Tier4InvocationThreshold = 0;
1551 }
1552 break;
1553 }
1554 }
1555
1556 // Conflict: required to use shared spaces (-Xshare:on), but
1557 // incompatible command line options were chosen.
1558 static void no_shared_spaces(const char* message) {
1559 if (RequireSharedSpaces) {
1560 jio_fprintf(defaultStream::error_stream(),
1561 "Class data sharing is inconsistent with other specified options.\n");
1562 vm_exit_during_initialization("Unable to use shared archive.", message);
1563 } else {
1564 FLAG_SET_DEFAULT(UseSharedSpaces, false);
1565 }
1566 }
1567
1568 // Returns threshold scaled with the value of scale.
1569 // If scale < 0.0, threshold is returned without scaling.
1570 intx Arguments::scaled_compile_threshold(intx threshold, double scale) {
1571 if (scale == 1.0 || scale < 0.0) {
1572 return threshold;
1573 } else {
1574 return (intx)(threshold * scale);
1575 }
1576 }
1577
1578 // Returns freq_log scaled with the value of scale.
1579 // Returned values are in the range of [0, InvocationCounter::number_of_count_bits + 1].
1580 // If scale < 0.0, freq_log is returned without scaling.
1581 intx Arguments::scaled_freq_log(intx freq_log, double scale) {
1582 // Check if scaling is necessary or if negative value was specified.
1583 if (scale == 1.0 || scale < 0.0) {
1584 return freq_log;
1585 }
1586 // Check values to avoid calculating log2 of 0.
1587 if (scale == 0.0 || freq_log == 0) {
1588 return 0;
1589 }
1590 // Determine the maximum notification frequency value currently supported.
1591 // The largest mask value that the interpreter/C1 can handle is
1592 // of length InvocationCounter::number_of_count_bits. Mask values are always
1593 // one bit shorter then the value of the notification frequency. Set
1594 // max_freq_bits accordingly.
1595 intx max_freq_bits = InvocationCounter::number_of_count_bits + 1;
1596 intx scaled_freq = scaled_compile_threshold((intx)1 << freq_log, scale);
1597 if (scaled_freq == 0) {
1598 // Return 0 right away to avoid calculating log2 of 0.
1599 return 0;
1600 } else if (scaled_freq > nth_bit(max_freq_bits)) {
1601 return max_freq_bits;
1602 } else {
1603 return log2_intptr(scaled_freq);
1604 }
1605 }
1606
1607 void Arguments::set_tiered_flags() {
1608 // With tiered, set default policy to AdvancedThresholdPolicy, which is 3.
1609 if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) {
1610 FLAG_SET_DEFAULT(CompilationPolicyChoice, 3);
1611 }
1612 if (CompilationPolicyChoice < 2) {
1613 vm_exit_during_initialization(
1614 "Incompatible compilation policy selected", NULL);
1615 }
1616 // Increase the code cache size - tiered compiles a lot more.
1617 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
1618 FLAG_SET_ERGO(uintx, ReservedCodeCacheSize,
1619 MIN2(CODE_CACHE_DEFAULT_LIMIT, ReservedCodeCacheSize * 5));
1620 }
1621 // Enable SegmentedCodeCache if TieredCompilation is enabled and ReservedCodeCacheSize >= 240M
1622 if (FLAG_IS_DEFAULT(SegmentedCodeCache) && ReservedCodeCacheSize >= 240*M) {
1623 FLAG_SET_ERGO(bool, SegmentedCodeCache, true);
1624 }
1625 if (!UseInterpreter) { // -Xcomp
1626 Tier3InvokeNotifyFreqLog = 0;
1627 Tier4InvocationThreshold = 0;
1628 }
1629
1630 if (CompileThresholdScaling < 0) {
1631 vm_exit_during_initialization("Negative value specified for CompileThresholdScaling", NULL);
1632 }
1633
1634 // Scale tiered compilation thresholds.
1635 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves compilation thresholds unchanged.
1636 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
1637 FLAG_SET_ERGO(intx, Tier0InvokeNotifyFreqLog, scaled_freq_log(Tier0InvokeNotifyFreqLog));
1638 FLAG_SET_ERGO(intx, Tier0BackedgeNotifyFreqLog, scaled_freq_log(Tier0BackedgeNotifyFreqLog));
1639
1640 FLAG_SET_ERGO(intx, Tier3InvocationThreshold, scaled_compile_threshold(Tier3InvocationThreshold));
1641 FLAG_SET_ERGO(intx, Tier3MinInvocationThreshold, scaled_compile_threshold(Tier3MinInvocationThreshold));
1642 FLAG_SET_ERGO(intx, Tier3CompileThreshold, scaled_compile_threshold(Tier3CompileThreshold));
1643 FLAG_SET_ERGO(intx, Tier3BackEdgeThreshold, scaled_compile_threshold(Tier3BackEdgeThreshold));
1644
1645 // Tier2{Invocation,MinInvocation,Compile,Backedge}Threshold should be scaled here
1646 // once these thresholds become supported.
1647
1648 FLAG_SET_ERGO(intx, Tier2InvokeNotifyFreqLog, scaled_freq_log(Tier2InvokeNotifyFreqLog));
1649 FLAG_SET_ERGO(intx, Tier2BackedgeNotifyFreqLog, scaled_freq_log(Tier2BackedgeNotifyFreqLog));
1650
1651 FLAG_SET_ERGO(intx, Tier3InvokeNotifyFreqLog, scaled_freq_log(Tier3InvokeNotifyFreqLog));
1652 FLAG_SET_ERGO(intx, Tier3BackedgeNotifyFreqLog, scaled_freq_log(Tier3BackedgeNotifyFreqLog));
1653
1654 FLAG_SET_ERGO(intx, Tier23InlineeNotifyFreqLog, scaled_freq_log(Tier23InlineeNotifyFreqLog));
1655
1656 FLAG_SET_ERGO(intx, Tier4InvocationThreshold, scaled_compile_threshold(Tier4InvocationThreshold));
1657 FLAG_SET_ERGO(intx, Tier4MinInvocationThreshold, scaled_compile_threshold(Tier4MinInvocationThreshold));
1658 FLAG_SET_ERGO(intx, Tier4CompileThreshold, scaled_compile_threshold(Tier4CompileThreshold));
1659 FLAG_SET_ERGO(intx, Tier4BackEdgeThreshold, scaled_compile_threshold(Tier4BackEdgeThreshold));
1660 }
1661 }
1662
1663 void set_object_alignment() {
1664 // Object alignment.
1665 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2");
1666 MinObjAlignmentInBytes = ObjectAlignmentInBytes;
1667 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small");
1668 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize;
1669 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect");
1670 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1;
1671
1672 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes);
1673 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize;
1674
1675 // Oop encoding heap max
1676 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes;
1677
1678 if (SurvivorAlignmentInBytes == 0) {
1679 SurvivorAlignmentInBytes = ObjectAlignmentInBytes;
1680 }
1681 }
1682
1683 size_t Arguments::max_heap_for_compressed_oops() {
1684 // Avoid sign flip.
1685 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size");
1686 // We need to fit both the NULL page and the heap into the memory budget, while
1687 // keeping alignment constraints of the heap. To guarantee the latter, as the
1688 // NULL page is located before the heap, we pad the NULL page to the conservative
1689 // maximum alignment that the GC may ever impose upon the heap.
1690 size_t displacement_due_to_null_page = align_up((size_t)os::vm_page_size(),
1691 _conservative_max_heap_alignment);
1692
1693 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page);
1694 NOT_LP64(ShouldNotReachHere(); return 0);
1695 }
1696
1697 void Arguments::set_use_compressed_oops() {
1698 #ifndef ZERO
1699 #ifdef _LP64
1700 // MaxHeapSize is not set up properly at this point, but
1701 // the only value that can override MaxHeapSize if we are
1702 // to use UseCompressedOops is InitialHeapSize.
1703 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize);
1704
1705 if (max_heap_size <= max_heap_for_compressed_oops()) {
1706 #if !defined(COMPILER1) || defined(TIERED)
1707 if (FLAG_IS_DEFAULT(UseCompressedOops)) {
1708 FLAG_SET_ERGO(bool, UseCompressedOops, true);
1709 }
1710 #endif
1711 } else {
1712 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) {
1713 warning("Max heap size too large for Compressed Oops");
1714 FLAG_SET_DEFAULT(UseCompressedOops, false);
1715 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1716 }
1717 }
1718 #endif // _LP64
1719 #endif // ZERO
1720 }
1721
1722
1723 // NOTE: set_use_compressed_klass_ptrs() must be called after calling
1724 // set_use_compressed_oops().
1725 void Arguments::set_use_compressed_klass_ptrs() {
1726 #ifndef ZERO
1727 #ifdef _LP64
1728 // UseCompressedOops must be on for UseCompressedClassPointers to be on.
1729 if (!UseCompressedOops) {
1730 if (UseCompressedClassPointers) {
1731 warning("UseCompressedClassPointers requires UseCompressedOops");
1732 }
1733 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1734 } else {
1735 // Turn on UseCompressedClassPointers too
1736 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) {
1737 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true);
1738 }
1739 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs.
1740 if (UseCompressedClassPointers) {
1741 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) {
1742 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers");
1743 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1744 }
1745 }
1746 }
1747 #endif // _LP64
1748 #endif // !ZERO
1749 }
1750
1751 void Arguments::set_conservative_max_heap_alignment() {
1752 // The conservative maximum required alignment for the heap is the maximum of
1753 // the alignments imposed by several sources: any requirements from the heap
1754 // itself, the collector policy and the maximum page size we may run the VM
1755 // with.
1756 size_t heap_alignment = GCConfig::arguments()->conservative_max_heap_alignment();
1757 _conservative_max_heap_alignment = MAX4(heap_alignment,
1758 (size_t)os::vm_allocation_granularity(),
1759 os::max_page_size(),
1760 CollectorPolicy::compute_heap_alignment());
1761 }
1762
1763 #ifdef TIERED
1764 bool Arguments::compilation_mode_selected() {
1765 return !FLAG_IS_DEFAULT(TieredCompilation) || !FLAG_IS_DEFAULT(TieredStopAtLevel) ||
1766 !FLAG_IS_DEFAULT(UseAOT) JVMCI_ONLY(|| !FLAG_IS_DEFAULT(EnableJVMCI) || !FLAG_IS_DEFAULT(UseJVMCICompiler));
1767
1768 }
1769
1770 void Arguments::select_compilation_mode_ergonomically() {
1771 #if defined(_WINDOWS) && !defined(_LP64)
1772 if (FLAG_IS_DEFAULT(NeverActAsServerClassMachine)) {
1773 FLAG_SET_ERGO(bool, NeverActAsServerClassMachine, true);
1774 }
1775 #endif
1776 if (NeverActAsServerClassMachine) {
1777 set_client_compilation_mode();
1778 }
1779 }
1780 #endif //TIERED
1781
1782 #if INCLUDE_JVMCI
1783 void Arguments::set_jvmci_specific_flags() {
1784 if (UseJVMCICompiler) {
1785 if (FLAG_IS_DEFAULT(TypeProfileWidth)) {
1786 FLAG_SET_DEFAULT(TypeProfileWidth, 8);
1787 }
1788 if (FLAG_IS_DEFAULT(OnStackReplacePercentage)) {
1789 FLAG_SET_DEFAULT(OnStackReplacePercentage, 933);
1790 }
1791 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
1792 FLAG_SET_DEFAULT(ReservedCodeCacheSize, 64*M);
1793 }
1794 if (FLAG_IS_DEFAULT(InitialCodeCacheSize)) {
1795 FLAG_SET_DEFAULT(InitialCodeCacheSize, 16*M);
1796 }
1797 if (FLAG_IS_DEFAULT(MetaspaceSize)) {
1798 FLAG_SET_DEFAULT(MetaspaceSize, 12*M);
1799 }
1800 if (FLAG_IS_DEFAULT(NewSizeThreadIncrease)) {
1801 FLAG_SET_DEFAULT(NewSizeThreadIncrease, 4*K);
1802 }
1803 if (TieredStopAtLevel != CompLevel_full_optimization) {
1804 // Currently JVMCI compiler can only work at the full optimization level
1805 warning("forcing TieredStopAtLevel to full optimization because JVMCI is enabled");
1806 TieredStopAtLevel = CompLevel_full_optimization;
1807 }
1808 if (FLAG_IS_DEFAULT(TypeProfileLevel)) {
1809 FLAG_SET_DEFAULT(TypeProfileLevel, 0);
1810 }
1811 }
1812 }
1813 #endif
1814
1815 jint Arguments::set_ergonomics_flags() {
1816 #ifdef TIERED
1817 if (!compilation_mode_selected()) {
1818 select_compilation_mode_ergonomically();
1819 }
1820 #endif
1821
1822 GCConfig::initialize();
1823
1824 #if defined(IA32)
1825 // Only server compiler can optimize safepoints well enough.
1826 if (!is_server_compilation_mode_vm()) {
1827 FLAG_SET_ERGO_IF_DEFAULT(bool, ThreadLocalHandshakes, false);
1828 }
1829 #endif
1830
1831 set_conservative_max_heap_alignment();
1832
1833 #ifndef ZERO
1834 #ifdef _LP64
1835 set_use_compressed_oops();
1836
1837 // set_use_compressed_klass_ptrs() must be called after calling
1838 // set_use_compressed_oops().
1839 set_use_compressed_klass_ptrs();
1840
1841 // Also checks that certain machines are slower with compressed oops
1842 // in vm_version initialization code.
1843 #endif // _LP64
1844 #endif // !ZERO
1845
1846 return JNI_OK;
1847 }
1848
1849 julong Arguments::limit_by_allocatable_memory(julong limit) {
1850 julong max_allocatable;
1851 julong result = limit;
1852 if (os::has_allocatable_memory_limit(&max_allocatable)) {
1853 result = MIN2(result, max_allocatable / MaxVirtMemFraction);
1854 }
1855 return result;
1856 }
1857
1858 // Use static initialization to get the default before parsing
1859 static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress;
1860
1861 void Arguments::set_heap_size() {
1862 julong phys_mem =
1863 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM)
1864 : (julong)MaxRAM;
1865
1866 // Convert deprecated flags
1867 if (FLAG_IS_DEFAULT(MaxRAMPercentage) &&
1868 !FLAG_IS_DEFAULT(MaxRAMFraction))
1869 MaxRAMPercentage = 100.0 / MaxRAMFraction;
1870
1871 if (FLAG_IS_DEFAULT(MinRAMPercentage) &&
1872 !FLAG_IS_DEFAULT(MinRAMFraction))
1873 MinRAMPercentage = 100.0 / MinRAMFraction;
1874
1875 if (FLAG_IS_DEFAULT(InitialRAMPercentage) &&
1876 !FLAG_IS_DEFAULT(InitialRAMFraction))
1877 InitialRAMPercentage = 100.0 / InitialRAMFraction;
1878
1879 // If the maximum heap size has not been set with -Xmx,
1880 // then set it as fraction of the size of physical memory,
1881 // respecting the maximum and minimum sizes of the heap.
1882 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
1883 julong reasonable_max = (julong)((phys_mem * MaxRAMPercentage) / 100);
1884 const julong reasonable_min = (julong)((phys_mem * MinRAMPercentage) / 100);
1885 if (reasonable_min < MaxHeapSize) {
1886 // Small physical memory, so use a minimum fraction of it for the heap
1887 reasonable_max = reasonable_min;
1888 } else {
1889 // Not-small physical memory, so require a heap at least
1890 // as large as MaxHeapSize
1891 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize);
1892 }
1893
1894 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) {
1895 // Limit the heap size to ErgoHeapSizeLimit
1896 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit);
1897 }
1898 if (UseCompressedOops) {
1899 // Limit the heap size to the maximum possible when using compressed oops
1900 julong max_coop_heap = (julong)max_heap_for_compressed_oops();
1901
1902 // HeapBaseMinAddress can be greater than default but not less than.
1903 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) {
1904 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) {
1905 // matches compressed oops printing flags
1906 log_debug(gc, heap, coops)("HeapBaseMinAddress must be at least " SIZE_FORMAT
1907 " (" SIZE_FORMAT "G) which is greater than value given " SIZE_FORMAT,
1908 DefaultHeapBaseMinAddress,
1909 DefaultHeapBaseMinAddress/G,
1910 HeapBaseMinAddress);
1911 FLAG_SET_ERGO(size_t, HeapBaseMinAddress, DefaultHeapBaseMinAddress);
1912 }
1913 }
1914
1915 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) {
1916 // Heap should be above HeapBaseMinAddress to get zero based compressed oops
1917 // but it should be not less than default MaxHeapSize.
1918 max_coop_heap -= HeapBaseMinAddress;
1919 }
1920 reasonable_max = MIN2(reasonable_max, max_coop_heap);
1921 }
1922 reasonable_max = limit_by_allocatable_memory(reasonable_max);
1923
1924 if (!FLAG_IS_DEFAULT(InitialHeapSize)) {
1925 // An initial heap size was specified on the command line,
1926 // so be sure that the maximum size is consistent. Done
1927 // after call to limit_by_allocatable_memory because that
1928 // method might reduce the allocation size.
1929 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize);
1930 }
1931
1932 log_trace(gc, heap)(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max);
1933 FLAG_SET_ERGO(size_t, MaxHeapSize, (size_t)reasonable_max);
1934 }
1935
1936 // If the minimum or initial heap_size have not been set or requested to be set
1937 // ergonomically, set them accordingly.
1938 if (InitialHeapSize == 0 || min_heap_size() == 0) {
1939 julong reasonable_minimum = (julong)(OldSize + NewSize);
1940
1941 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize);
1942
1943 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum);
1944
1945 if (InitialHeapSize == 0) {
1946 julong reasonable_initial = (julong)((phys_mem * InitialRAMPercentage) / 100);
1947
1948 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size());
1949 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize);
1950
1951 reasonable_initial = limit_by_allocatable_memory(reasonable_initial);
1952
1953 log_trace(gc, heap)(" Initial heap size " SIZE_FORMAT, (size_t)reasonable_initial);
1954 FLAG_SET_ERGO(size_t, InitialHeapSize, (size_t)reasonable_initial);
1955 }
1956 // If the minimum heap size has not been set (via -Xms),
1957 // synchronize with InitialHeapSize to avoid errors with the default value.
1958 if (min_heap_size() == 0) {
1959 set_min_heap_size(MIN2((size_t)reasonable_minimum, InitialHeapSize));
1960 log_trace(gc, heap)(" Minimum heap size " SIZE_FORMAT, min_heap_size());
1961 }
1962 }
1963 }
1964
1965 // This option inspects the machine and attempts to set various
1966 // parameters to be optimal for long-running, memory allocation
1967 // intensive jobs. It is intended for machines with large
1968 // amounts of cpu and memory.
1969 jint Arguments::set_aggressive_heap_flags() {
1970 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit
1971 // VM, but we may not be able to represent the total physical memory
1972 // available (like having 8gb of memory on a box but using a 32bit VM).
1973 // Thus, we need to make sure we're using a julong for intermediate
1974 // calculations.
1975 julong initHeapSize;
1976 julong total_memory = os::physical_memory();
1977
1978 if (total_memory < (julong) 256 * M) {
1979 jio_fprintf(defaultStream::error_stream(),
1980 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n");
1981 vm_exit(1);
1982 }
1983
1984 // The heap size is half of available memory, or (at most)
1985 // all of possible memory less 160mb (leaving room for the OS
1986 // when using ISM). This is the maximum; because adaptive sizing
1987 // is turned on below, the actual space used may be smaller.
1988
1989 initHeapSize = MIN2(total_memory / (julong) 2,
1990 total_memory - (julong) 160 * M);
1991
1992 initHeapSize = limit_by_allocatable_memory(initHeapSize);
1993
1994 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
1995 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, initHeapSize) != Flag::SUCCESS) {
1996 return JNI_EINVAL;
1997 }
1998 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, initHeapSize) != Flag::SUCCESS) {
1999 return JNI_EINVAL;
2000 }
2001 // Currently the minimum size and the initial heap sizes are the same.
2002 set_min_heap_size(initHeapSize);
2003 }
2004 if (FLAG_IS_DEFAULT(NewSize)) {
2005 // Make the young generation 3/8ths of the total heap.
2006 if (FLAG_SET_CMDLINE(size_t, NewSize,
2007 ((julong) MaxHeapSize / (julong) 8) * (julong) 3) != Flag::SUCCESS) {
2008 return JNI_EINVAL;
2009 }
2010 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, NewSize) != Flag::SUCCESS) {
2011 return JNI_EINVAL;
2012 }
2013 }
2014
2015 #if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
2016 FLAG_SET_DEFAULT(UseLargePages, true);
2017 #endif
2018
2019 // Increase some data structure sizes for efficiency
2020 if (FLAG_SET_CMDLINE(size_t, BaseFootPrintEstimate, MaxHeapSize) != Flag::SUCCESS) {
2021 return JNI_EINVAL;
2022 }
2023 if (FLAG_SET_CMDLINE(bool, ResizeTLAB, false) != Flag::SUCCESS) {
2024 return JNI_EINVAL;
2025 }
2026 if (FLAG_SET_CMDLINE(size_t, TLABSize, 256 * K) != Flag::SUCCESS) {
2027 return JNI_EINVAL;
2028 }
2029
2030 // See the OldPLABSize comment below, but replace 'after promotion'
2031 // with 'after copying'. YoungPLABSize is the size of the survivor
2032 // space per-gc-thread buffers. The default is 4kw.
2033 if (FLAG_SET_CMDLINE(size_t, YoungPLABSize, 256 * K) != Flag::SUCCESS) { // Note: this is in words
2034 return JNI_EINVAL;
2035 }
2036
2037 // OldPLABSize is the size of the buffers in the old gen that
2038 // UseParallelGC uses to promote live data that doesn't fit in the
2039 // survivor spaces. At any given time, there's one for each gc thread.
2040 // The default size is 1kw. These buffers are rarely used, since the
2041 // survivor spaces are usually big enough. For specjbb, however, there
2042 // are occasions when there's lots of live data in the young gen
2043 // and we end up promoting some of it. We don't have a definite
2044 // explanation for why bumping OldPLABSize helps, but the theory
2045 // is that a bigger PLAB results in retaining something like the
2046 // original allocation order after promotion, which improves mutator
2047 // locality. A minor effect may be that larger PLABs reduce the
2048 // number of PLAB allocation events during gc. The value of 8kw
2049 // was arrived at by experimenting with specjbb.
2050 if (FLAG_SET_CMDLINE(size_t, OldPLABSize, 8 * K) != Flag::SUCCESS) { // Note: this is in words
2051 return JNI_EINVAL;
2052 }
2053
2054 // Enable parallel GC and adaptive generation sizing
2055 if (FLAG_SET_CMDLINE(bool, UseParallelGC, true) != Flag::SUCCESS) {
2056 return JNI_EINVAL;
2057 }
2058
2059 // Encourage steady state memory management
2060 if (FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100) != Flag::SUCCESS) {
2061 return JNI_EINVAL;
2062 }
2063
2064 // This appears to improve mutator locality
2065 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
2066 return JNI_EINVAL;
2067 }
2068
2069 // Get around early Solaris scheduling bug
2070 // (affinity vs other jobs on system)
2071 // but disallow DR and offlining (5008695).
2072 if (FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true) != Flag::SUCCESS) {
2073 return JNI_EINVAL;
2074 }
2075
2076 return JNI_OK;
2077 }
2078
2079 // This must be called after ergonomics.
2080 void Arguments::set_bytecode_flags() {
2081 if (!RewriteBytecodes) {
2082 FLAG_SET_DEFAULT(RewriteFrequentPairs, false);
2083 }
2084 }
2085
2086 // Aggressive optimization flags -XX:+AggressiveOpts
2087 jint Arguments::set_aggressive_opts_flags() {
2088 #ifdef COMPILER2
2089 if (AggressiveUnboxing) {
2090 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
2091 FLAG_SET_DEFAULT(EliminateAutoBox, true);
2092 } else if (!EliminateAutoBox) {
2093 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled");
2094 AggressiveUnboxing = false;
2095 }
2096 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) {
2097 FLAG_SET_DEFAULT(DoEscapeAnalysis, true);
2098 } else if (!DoEscapeAnalysis) {
2099 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled");
2100 AggressiveUnboxing = false;
2101 }
2102 }
2103 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
2104 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
2105 FLAG_SET_DEFAULT(EliminateAutoBox, true);
2106 }
2107 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
2108 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000);
2109 }
2110
2111 // Feed the cache size setting into the JDK
2112 char buffer[1024];
2113 jio_snprintf(buffer, 1024, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax);
2114 if (!add_property(buffer)) {
2115 return JNI_ENOMEM;
2116 }
2117 }
2118 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) {
2119 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500);
2120 }
2121 #endif
2122
2123 if (AggressiveOpts) {
2124 // Sample flag setting code
2125 // if (FLAG_IS_DEFAULT(EliminateZeroing)) {
2126 // FLAG_SET_DEFAULT(EliminateZeroing, true);
2127 // }
2128 }
2129
2130 return JNI_OK;
2131 }
2132
2133 //===========================================================================================================
2134 // Parsing of java.compiler property
2135
2136 void Arguments::process_java_compiler_argument(const char* arg) {
2137 // For backwards compatibility, Djava.compiler=NONE or ""
2138 // causes us to switch to -Xint mode UNLESS -Xdebug
2139 // is also specified.
2140 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) {
2141 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen.
2142 }
2143 }
2144
2145 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) {
2146 _sun_java_launcher = os::strdup_check_oom(launcher);
2147 }
2148
2149 bool Arguments::created_by_java_launcher() {
2150 assert(_sun_java_launcher != NULL, "property must have value");
2151 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0;
2152 }
2153
2154 bool Arguments::sun_java_launcher_is_altjvm() {
2155 return _sun_java_launcher_is_altjvm;
2156 }
2157
2158 //===========================================================================================================
2159 // Parsing of main arguments
2160
2161 #if INCLUDE_JVMCI
2162 // Check consistency of jvmci vm argument settings.
2163 bool Arguments::check_jvmci_args_consistency() {
2164 return JVMCIGlobals::check_jvmci_flags_are_consistent();
2165 }
2166 #endif //INCLUDE_JVMCI
2167
2168 // Check the consistency of vm_init_args
2169 bool Arguments::check_vm_args_consistency() {
2170 // Method for adding checks for flag consistency.
2171 // The intent is to warn the user of all possible conflicts,
2172 // before returning an error.
2173 // Note: Needs platform-dependent factoring.
2174 bool status = true;
2175
2176 if (TLABRefillWasteFraction == 0) {
2177 jio_fprintf(defaultStream::error_stream(),
2178 "TLABRefillWasteFraction should be a denominator, "
2179 "not " SIZE_FORMAT "\n",
2180 TLABRefillWasteFraction);
2181 status = false;
2182 }
2183
2184 if (PrintNMTStatistics) {
2185 #if INCLUDE_NMT
2186 if (MemTracker::tracking_level() == NMT_off) {
2187 #endif // INCLUDE_NMT
2188 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled");
2189 PrintNMTStatistics = false;
2190 #if INCLUDE_NMT
2191 }
2192 #endif
2193 }
2194
2195 #if INCLUDE_JVMCI
2196 status = status && check_jvmci_args_consistency();
2197
2198 if (EnableJVMCI) {
2199 PropertyList_unique_add(&_system_properties, "jdk.internal.vm.ci.enabled", "true",
2200 AddProperty, UnwriteableProperty, InternalProperty);
2201
2202 if (!ScavengeRootsInCode) {
2203 warning("forcing ScavengeRootsInCode non-zero because JVMCI is enabled");
2204 ScavengeRootsInCode = 1;
2205 }
2206 }
2207 #endif
2208
2209 // Check lower bounds of the code cache
2210 // Template Interpreter code is approximately 3X larger in debug builds.
2211 uint min_code_cache_size = CodeCacheMinimumUseSpace DEBUG_ONLY(* 3);
2212 if (ReservedCodeCacheSize < InitialCodeCacheSize) {
2213 jio_fprintf(defaultStream::error_stream(),
2214 "Invalid ReservedCodeCacheSize: %dK. Must be at least InitialCodeCacheSize=%dK.\n",
2215 ReservedCodeCacheSize/K, InitialCodeCacheSize/K);
2216 status = false;
2217 } else if (ReservedCodeCacheSize < min_code_cache_size) {
2218 jio_fprintf(defaultStream::error_stream(),
2219 "Invalid ReservedCodeCacheSize=%dK. Must be at least %uK.\n", ReservedCodeCacheSize/K,
2220 min_code_cache_size/K);
2221 status = false;
2222 } else if (ReservedCodeCacheSize > CODE_CACHE_SIZE_LIMIT) {
2223 // Code cache size larger than CODE_CACHE_SIZE_LIMIT is not supported.
2224 jio_fprintf(defaultStream::error_stream(),
2225 "Invalid ReservedCodeCacheSize=%dM. Must be at most %uM.\n", ReservedCodeCacheSize/M,
2226 CODE_CACHE_SIZE_LIMIT/M);
2227 status = false;
2228 } else if (NonNMethodCodeHeapSize < min_code_cache_size) {
2229 jio_fprintf(defaultStream::error_stream(),
2230 "Invalid NonNMethodCodeHeapSize=%dK. Must be at least %uK.\n", NonNMethodCodeHeapSize/K,
2231 min_code_cache_size/K);
2232 status = false;
2233 }
2234
2235 #ifdef _LP64
2236 if (!FLAG_IS_DEFAULT(CICompilerCount) && !FLAG_IS_DEFAULT(CICompilerCountPerCPU) && CICompilerCountPerCPU) {
2237 warning("The VM option CICompilerCountPerCPU overrides CICompilerCount.");
2238 }
2239 #endif
2240
2241 #ifndef SUPPORT_RESERVED_STACK_AREA
2242 if (StackReservedPages != 0) {
2243 FLAG_SET_CMDLINE(intx, StackReservedPages, 0);
2244 warning("Reserved Stack Area not supported on this platform");
2245 }
2246 #endif
2247
2248 if (BackgroundCompilation && (CompileTheWorld || ReplayCompiles)) {
2249 if (!FLAG_IS_DEFAULT(BackgroundCompilation)) {
2250 warning("BackgroundCompilation disabled due to CompileTheWorld or ReplayCompiles options.");
2251 }
2252 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false);
2253 }
2254 if (UseCompiler && is_interpreter_only()) {
2255 if (!FLAG_IS_DEFAULT(UseCompiler)) {
2256 warning("UseCompiler disabled due to -Xint.");
2257 }
2258 FLAG_SET_CMDLINE(bool, UseCompiler, false);
2259 }
2260 #ifdef COMPILER2
2261 if (PostLoopMultiversioning && !RangeCheckElimination) {
2262 if (!FLAG_IS_DEFAULT(PostLoopMultiversioning)) {
2263 warning("PostLoopMultiversioning disabled because RangeCheckElimination is disabled.");
2264 }
2265 FLAG_SET_CMDLINE(bool, PostLoopMultiversioning, false);
2266 }
2267 if (UseCountedLoopSafepoints && LoopStripMiningIter == 0) {
2268 if (!FLAG_IS_DEFAULT(UseCountedLoopSafepoints) || !FLAG_IS_DEFAULT(LoopStripMiningIter)) {
2269 warning("When counted loop safepoints are enabled, LoopStripMiningIter must be at least 1 (a safepoint every 1 iteration): setting it to 1");
2270 }
2271 LoopStripMiningIter = 1;
2272 } else if (!UseCountedLoopSafepoints && LoopStripMiningIter > 0) {
2273 if (!FLAG_IS_DEFAULT(UseCountedLoopSafepoints) || !FLAG_IS_DEFAULT(LoopStripMiningIter)) {
2274 warning("Disabling counted safepoints implies no loop strip mining: setting LoopStripMiningIter to 0");
2275 }
2276 LoopStripMiningIter = 0;
2277 }
2278 #endif
2279 if (!FLAG_IS_DEFAULT(AllocateHeapAt)) {
2280 if ((UseNUMAInterleaving && !FLAG_IS_DEFAULT(UseNUMAInterleaving)) || (UseNUMA && !FLAG_IS_DEFAULT(UseNUMA))) {
2281 log_warning(arguments) ("NUMA support for Heap depends on the file system when AllocateHeapAt option is used.\n");
2282 }
2283 }
2284 return status;
2285 }
2286
2287 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore,
2288 const char* option_type) {
2289 if (ignore) return false;
2290
2291 const char* spacer = " ";
2292 if (option_type == NULL) {
2293 option_type = ++spacer; // Set both to the empty string.
2294 }
2295
2296 if (os::obsolete_option(option)) {
2297 jio_fprintf(defaultStream::error_stream(),
2298 "Obsolete %s%soption: %s\n", option_type, spacer,
2299 option->optionString);
2300 return false;
2301 } else {
2302 jio_fprintf(defaultStream::error_stream(),
2303 "Unrecognized %s%soption: %s\n", option_type, spacer,
2304 option->optionString);
2305 return true;
2306 }
2307 }
2308
2309 static const char* user_assertion_options[] = {
2310 "-da", "-ea", "-disableassertions", "-enableassertions", 0
2311 };
2312
2313 static const char* system_assertion_options[] = {
2314 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0
2315 };
2316
2317 bool Arguments::parse_uintx(const char* value,
2318 uintx* uintx_arg,
2319 uintx min_size) {
2320
2321 // Check the sign first since atojulong() parses only unsigned values.
2322 bool value_is_positive = !(*value == '-');
2323
2324 if (value_is_positive) {
2325 julong n;
2326 bool good_return = atojulong(value, &n);
2327 if (good_return) {
2328 bool above_minimum = n >= min_size;
2329 bool value_is_too_large = n > max_uintx;
2330
2331 if (above_minimum && !value_is_too_large) {
2332 *uintx_arg = n;
2333 return true;
2334 }
2335 }
2336 }
2337 return false;
2338 }
2339
2340 unsigned int addreads_count = 0;
2341 unsigned int addexports_count = 0;
2342 unsigned int addopens_count = 0;
2343 unsigned int addmods_count = 0;
2344 unsigned int patch_mod_count = 0;
2345
2346 bool Arguments::create_property(const char* prop_name, const char* prop_value, PropertyInternal internal) {
2347 size_t prop_len = strlen(prop_name) + strlen(prop_value) + 2;
2348 char* property = AllocateHeap(prop_len, mtArguments);
2349 int ret = jio_snprintf(property, prop_len, "%s=%s", prop_name, prop_value);
2350 if (ret < 0 || ret >= (int)prop_len) {
2351 FreeHeap(property);
2352 return false;
2353 }
2354 bool added = add_property(property, UnwriteableProperty, internal);
2355 FreeHeap(property);
2356 return added;
2357 }
2358
2359 bool Arguments::create_numbered_property(const char* prop_base_name, const char* prop_value, unsigned int count) {
2360 const unsigned int props_count_limit = 1000;
2361 const int max_digits = 3;
2362 const int extra_symbols_count = 3; // includes '.', '=', '\0'
2363
2364 // Make sure count is < props_count_limit. Otherwise, memory allocation will be too small.
2365 if (count < props_count_limit) {
2366 size_t prop_len = strlen(prop_base_name) + strlen(prop_value) + max_digits + extra_symbols_count;
2367 char* property = AllocateHeap(prop_len, mtArguments);
2368 int ret = jio_snprintf(property, prop_len, "%s.%d=%s", prop_base_name, count, prop_value);
2369 if (ret < 0 || ret >= (int)prop_len) {
2370 FreeHeap(property);
2371 jio_fprintf(defaultStream::error_stream(), "Failed to create property %s.%d=%s\n", prop_base_name, count, prop_value);
2372 return false;
2373 }
2374 bool added = add_property(property, UnwriteableProperty, InternalProperty);
2375 FreeHeap(property);
2376 return added;
2377 }
2378
2379 jio_fprintf(defaultStream::error_stream(), "Property count limit exceeded: %s, limit=%d\n", prop_base_name, props_count_limit);
2380 return false;
2381 }
2382
2383 Arguments::ArgsRange Arguments::parse_memory_size(const char* s,
2384 julong* long_arg,
2385 julong min_size,
2386 julong max_size) {
2387 if (!atojulong(s, long_arg)) return arg_unreadable;
2388 return check_memory_size(*long_arg, min_size, max_size);
2389 }
2390
2391 // Parse JavaVMInitArgs structure
2392
2393 jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args,
2394 const JavaVMInitArgs *java_options_args,
2395 const JavaVMInitArgs *cmd_line_args) {
2396 bool patch_mod_javabase = false;
2397
2398 // Save default settings for some mode flags
2399 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
2400 Arguments::_UseOnStackReplacement = UseOnStackReplacement;
2401 Arguments::_ClipInlining = ClipInlining;
2402 Arguments::_BackgroundCompilation = BackgroundCompilation;
2403 if (TieredCompilation) {
2404 Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
2405 Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
2406 }
2407
2408 // Setup flags for mixed which is the default
2409 set_mode_flags(_mixed);
2410
2411 // Parse args structure generated from JAVA_TOOL_OPTIONS environment
2412 // variable (if present).
2413 jint result = parse_each_vm_init_arg(java_tool_options_args, &patch_mod_javabase, Flag::ENVIRON_VAR);
2414 if (result != JNI_OK) {
2415 return result;
2416 }
2417
2418 // Parse args structure generated from the command line flags.
2419 result = parse_each_vm_init_arg(cmd_line_args, &patch_mod_javabase, Flag::COMMAND_LINE);
2420 if (result != JNI_OK) {
2421 return result;
2422 }
2423
2424 // Parse args structure generated from the _JAVA_OPTIONS environment
2425 // variable (if present) (mimics classic VM)
2426 result = parse_each_vm_init_arg(java_options_args, &patch_mod_javabase, Flag::ENVIRON_VAR);
2427 if (result != JNI_OK) {
2428 return result;
2429 }
2430
2431 // We need to ensure processor and memory resources have been properly
2432 // configured - which may rely on arguments we just processed - before
2433 // doing the final argument processing. Any argument processing that
2434 // needs to know about processor and memory resources must occur after
2435 // this point.
2436
2437 os::init_container_support();
2438
2439 // Do final processing now that all arguments have been parsed
2440 result = finalize_vm_init_args(patch_mod_javabase);
2441 if (result != JNI_OK) {
2442 return result;
2443 }
2444
2445 return JNI_OK;
2446 }
2447
2448 // Checks if name in command-line argument -agent{lib,path}:name[=options]
2449 // represents a valid JDWP agent. is_path==true denotes that we
2450 // are dealing with -agentpath (case where name is a path), otherwise with
2451 // -agentlib
2452 bool valid_jdwp_agent(char *name, bool is_path) {
2453 char *_name;
2454 const char *_jdwp = "jdwp";
2455 size_t _len_jdwp, _len_prefix;
2456
2457 if (is_path) {
2458 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) {
2459 return false;
2460 }
2461
2462 _name++; // skip past last path separator
2463 _len_prefix = strlen(JNI_LIB_PREFIX);
2464
2465 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) {
2466 return false;
2467 }
2468
2469 _name += _len_prefix;
2470 _len_jdwp = strlen(_jdwp);
2471
2472 if (strncmp(_name, _jdwp, _len_jdwp) == 0) {
2473 _name += _len_jdwp;
2474 }
2475 else {
2476 return false;
2477 }
2478
2479 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) {
2480 return false;
2481 }
2482
2483 return true;
2484 }
2485
2486 if (strcmp(name, _jdwp) == 0) {
2487 return true;
2488 }
2489
2490 return false;
2491 }
2492
2493 int Arguments::process_patch_mod_option(const char* patch_mod_tail, bool* patch_mod_javabase) {
2494 // --patch-module=<module>=<file>(<pathsep><file>)*
2495 assert(patch_mod_tail != NULL, "Unexpected NULL patch-module value");
2496 // Find the equal sign between the module name and the path specification
2497 const char* module_equal = strchr(patch_mod_tail, '=');
2498 if (module_equal == NULL) {
2499 jio_fprintf(defaultStream::output_stream(), "Missing '=' in --patch-module specification\n");
2500 return JNI_ERR;
2501 } else {
2502 // Pick out the module name
2503 size_t module_len = module_equal - patch_mod_tail;
2504 char* module_name = NEW_C_HEAP_ARRAY_RETURN_NULL(char, module_len+1, mtArguments);
2505 if (module_name != NULL) {
2506 memcpy(module_name, patch_mod_tail, module_len);
2507 *(module_name + module_len) = '\0';
2508 // The path piece begins one past the module_equal sign
2509 add_patch_mod_prefix(module_name, module_equal + 1, patch_mod_javabase);
2510 FREE_C_HEAP_ARRAY(char, module_name);
2511 if (!create_numbered_property("jdk.module.patch", patch_mod_tail, patch_mod_count++)) {
2512 return JNI_ENOMEM;
2513 }
2514 } else {
2515 return JNI_ENOMEM;
2516 }
2517 }
2518 return JNI_OK;
2519 }
2520
2521 // Parse -Xss memory string parameter and convert to ThreadStackSize in K.
2522 jint Arguments::parse_xss(const JavaVMOption* option, const char* tail, intx* out_ThreadStackSize) {
2523 // The min and max sizes match the values in globals.hpp, but scaled
2524 // with K. The values have been chosen so that alignment with page
2525 // size doesn't change the max value, which makes the conversions
2526 // back and forth between Xss value and ThreadStackSize value easier.
2527 // The values have also been chosen to fit inside a 32-bit signed type.
2528 const julong min_ThreadStackSize = 0;
2529 const julong max_ThreadStackSize = 1 * M;
2530
2531 const julong min_size = min_ThreadStackSize * K;
2532 const julong max_size = max_ThreadStackSize * K;
2533
2534 assert(is_aligned(max_size, os::vm_page_size()), "Implementation assumption");
2535
2536 julong size = 0;
2537 ArgsRange errcode = parse_memory_size(tail, &size, min_size, max_size);
2538 if (errcode != arg_in_range) {
2539 bool silent = (option == NULL); // Allow testing to silence error messages
2540 if (!silent) {
2541 jio_fprintf(defaultStream::error_stream(),
2542 "Invalid thread stack size: %s\n", option->optionString);
2543 describe_range_error(errcode);
2544 }
2545 return JNI_EINVAL;
2546 }
2547
2548 // Internally track ThreadStackSize in units of 1024 bytes.
2549 const julong size_aligned = align_up(size, K);
2550 assert(size <= size_aligned,
2551 "Overflow: " JULONG_FORMAT " " JULONG_FORMAT,
2552 size, size_aligned);
2553
2554 const julong size_in_K = size_aligned / K;
2555 assert(size_in_K < (julong)max_intx,
2556 "size_in_K doesn't fit in the type of ThreadStackSize: " JULONG_FORMAT,
2557 size_in_K);
2558
2559 // Check that code expanding ThreadStackSize to a page aligned number of bytes won't overflow.
2560 const julong max_expanded = align_up(size_in_K * K, os::vm_page_size());
2561 assert(max_expanded < max_uintx && max_expanded >= size_in_K,
2562 "Expansion overflowed: " JULONG_FORMAT " " JULONG_FORMAT,
2563 max_expanded, size_in_K);
2564
2565 *out_ThreadStackSize = (intx)size_in_K;
2566
2567 return JNI_OK;
2568 }
2569
2570 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, bool* patch_mod_javabase, Flag::Flags origin) {
2571 // For match_option to return remaining or value part of option string
2572 const char* tail;
2573
2574 // iterate over arguments
2575 for (int index = 0; index < args->nOptions; index++) {
2576 bool is_absolute_path = false; // for -agentpath vs -agentlib
2577
2578 const JavaVMOption* option = args->options + index;
2579
2580 if (!match_option(option, "-Djava.class.path", &tail) &&
2581 !match_option(option, "-Dsun.java.command", &tail) &&
2582 !match_option(option, "-Dsun.java.launcher", &tail)) {
2583
2584 // add all jvm options to the jvm_args string. This string
2585 // is used later to set the java.vm.args PerfData string constant.
2586 // the -Djava.class.path and the -Dsun.java.command options are
2587 // omitted from jvm_args string as each have their own PerfData
2588 // string constant object.
2589 build_jvm_args(option->optionString);
2590 }
2591
2592 // -verbose:[class/module/gc/jni]
2593 if (match_option(option, "-verbose", &tail)) {
2594 if (!strcmp(tail, ":class") || !strcmp(tail, "")) {
2595 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, load));
2596 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, unload));
2597 } else if (!strcmp(tail, ":module")) {
2598 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, load));
2599 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, unload));
2600 } else if (!strcmp(tail, ":gc")) {
2601 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
2602 } else if (!strcmp(tail, ":jni")) {
2603 if (FLAG_SET_CMDLINE(bool, PrintJNIResolving, true) != Flag::SUCCESS) {
2604 return JNI_EINVAL;
2605 }
2606 }
2607 // -da / -ea / -disableassertions / -enableassertions
2608 // These accept an optional class/package name separated by a colon, e.g.,
2609 // -da:java.lang.Thread.
2610 } else if (match_option(option, user_assertion_options, &tail, true)) {
2611 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2612 if (*tail == '\0') {
2613 JavaAssertions::setUserClassDefault(enable);
2614 } else {
2615 assert(*tail == ':', "bogus match by match_option()");
2616 JavaAssertions::addOption(tail + 1, enable);
2617 }
2618 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions
2619 } else if (match_option(option, system_assertion_options, &tail, false)) {
2620 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2621 JavaAssertions::setSystemClassDefault(enable);
2622 // -bootclasspath:
2623 } else if (match_option(option, "-Xbootclasspath:", &tail)) {
2624 jio_fprintf(defaultStream::output_stream(),
2625 "-Xbootclasspath is no longer a supported option.\n");
2626 return JNI_EINVAL;
2627 // -bootclasspath/a:
2628 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) {
2629 Arguments::append_sysclasspath(tail);
2630 // -bootclasspath/p:
2631 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) {
2632 jio_fprintf(defaultStream::output_stream(),
2633 "-Xbootclasspath/p is no longer a supported option.\n");
2634 return JNI_EINVAL;
2635 // -Xrun
2636 } else if (match_option(option, "-Xrun", &tail)) {
2637 if (tail != NULL) {
2638 const char* pos = strchr(tail, ':');
2639 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2640 char* name = NEW_C_HEAP_ARRAY(char, len + 1, mtArguments);
2641 jio_snprintf(name, len + 1, "%s", tail);
2642
2643 char *options = NULL;
2644 if(pos != NULL) {
2645 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied.
2646 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtArguments), pos+1, len2);
2647 }
2648 #if !INCLUDE_JVMTI
2649 if (strcmp(name, "jdwp") == 0) {
2650 jio_fprintf(defaultStream::error_stream(),
2651 "Debugging agents are not supported in this VM\n");
2652 return JNI_ERR;
2653 }
2654 #endif // !INCLUDE_JVMTI
2655 add_init_library(name, options);
2656 }
2657 } else if (match_option(option, "--add-reads=", &tail)) {
2658 if (!create_numbered_property("jdk.module.addreads", tail, addreads_count++)) {
2659 return JNI_ENOMEM;
2660 }
2661 } else if (match_option(option, "--add-exports=", &tail)) {
2662 if (!create_numbered_property("jdk.module.addexports", tail, addexports_count++)) {
2663 return JNI_ENOMEM;
2664 }
2665 } else if (match_option(option, "--add-opens=", &tail)) {
2666 if (!create_numbered_property("jdk.module.addopens", tail, addopens_count++)) {
2667 return JNI_ENOMEM;
2668 }
2669 } else if (match_option(option, "--add-modules=", &tail)) {
2670 if (!create_numbered_property("jdk.module.addmods", tail, addmods_count++)) {
2671 return JNI_ENOMEM;
2672 }
2673 } else if (match_option(option, "--limit-modules=", &tail)) {
2674 if (!create_property("jdk.module.limitmods", tail, InternalProperty)) {
2675 return JNI_ENOMEM;
2676 }
2677 } else if (match_option(option, "--module-path=", &tail)) {
2678 if (!create_property("jdk.module.path", tail, ExternalProperty)) {
2679 return JNI_ENOMEM;
2680 }
2681 } else if (match_option(option, "--upgrade-module-path=", &tail)) {
2682 if (!create_property("jdk.module.upgrade.path", tail, ExternalProperty)) {
2683 return JNI_ENOMEM;
2684 }
2685 } else if (match_option(option, "--patch-module=", &tail)) {
2686 // --patch-module=<module>=<file>(<pathsep><file>)*
2687 int res = process_patch_mod_option(tail, patch_mod_javabase);
2688 if (res != JNI_OK) {
2689 return res;
2690 }
2691 } else if (match_option(option, "--illegal-access=", &tail)) {
2692 if (!create_property("jdk.module.illegalAccess", tail, ExternalProperty)) {
2693 return JNI_ENOMEM;
2694 }
2695 // -agentlib and -agentpath
2696 } else if (match_option(option, "-agentlib:", &tail) ||
2697 (is_absolute_path = match_option(option, "-agentpath:", &tail))) {
2698 if(tail != NULL) {
2699 const char* pos = strchr(tail, '=');
2700 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2701 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtArguments), tail, len);
2702 name[len] = '\0';
2703
2704 char *options = NULL;
2705 if(pos != NULL) {
2706 options = os::strdup_check_oom(pos + 1, mtArguments);
2707 }
2708 #if !INCLUDE_JVMTI
2709 if (valid_jdwp_agent(name, is_absolute_path)) {
2710 jio_fprintf(defaultStream::error_stream(),
2711 "Debugging agents are not supported in this VM\n");
2712 return JNI_ERR;
2713 }
2714 #endif // !INCLUDE_JVMTI
2715 add_init_agent(name, options, is_absolute_path);
2716 }
2717 // -javaagent
2718 } else if (match_option(option, "-javaagent:", &tail)) {
2719 #if !INCLUDE_JVMTI
2720 jio_fprintf(defaultStream::error_stream(),
2721 "Instrumentation agents are not supported in this VM\n");
2722 return JNI_ERR;
2723 #else
2724 if (tail != NULL) {
2725 size_t length = strlen(tail) + 1;
2726 char *options = NEW_C_HEAP_ARRAY(char, length, mtArguments);
2727 jio_snprintf(options, length, "%s", tail);
2728 add_instrument_agent("instrument", options, false);
2729 // java agents need module java.instrument
2730 if (!create_numbered_property("jdk.module.addmods", "java.instrument", addmods_count++)) {
2731 return JNI_ENOMEM;
2732 }
2733 }
2734 #endif // !INCLUDE_JVMTI
2735 // --enable_preview
2736 } else if (match_option(option, "--enable-preview")) {
2737 set_enable_preview();
2738 // -Xnoclassgc
2739 } else if (match_option(option, "-Xnoclassgc")) {
2740 if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != Flag::SUCCESS) {
2741 return JNI_EINVAL;
2742 }
2743 // -Xconcgc
2744 } else if (match_option(option, "-Xconcgc")) {
2745 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true) != Flag::SUCCESS) {
2746 return JNI_EINVAL;
2747 }
2748 handle_extra_cms_flags("-Xconcgc uses UseConcMarkSweepGC");
2749 // -Xnoconcgc
2750 } else if (match_option(option, "-Xnoconcgc")) {
2751 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false) != Flag::SUCCESS) {
2752 return JNI_EINVAL;
2753 }
2754 handle_extra_cms_flags("-Xnoconcgc uses UseConcMarkSweepGC");
2755 // -Xbatch
2756 } else if (match_option(option, "-Xbatch")) {
2757 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
2758 return JNI_EINVAL;
2759 }
2760 // -Xmn for compatibility with other JVM vendors
2761 } else if (match_option(option, "-Xmn", &tail)) {
2762 julong long_initial_young_size = 0;
2763 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1);
2764 if (errcode != arg_in_range) {
2765 jio_fprintf(defaultStream::error_stream(),
2766 "Invalid initial young generation size: %s\n", option->optionString);
2767 describe_range_error(errcode);
2768 return JNI_EINVAL;
2769 }
2770 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
2771 return JNI_EINVAL;
2772 }
2773 if (FLAG_SET_CMDLINE(size_t, NewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
2774 return JNI_EINVAL;
2775 }
2776 // -Xms
2777 } else if (match_option(option, "-Xms", &tail)) {
2778 julong long_initial_heap_size = 0;
2779 // an initial heap size of 0 means automatically determine
2780 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0);
2781 if (errcode != arg_in_range) {
2782 jio_fprintf(defaultStream::error_stream(),
2783 "Invalid initial heap size: %s\n", option->optionString);
2784 describe_range_error(errcode);
2785 return JNI_EINVAL;
2786 }
2787 set_min_heap_size((size_t)long_initial_heap_size);
2788 // Currently the minimum size and the initial heap sizes are the same.
2789 // Can be overridden with -XX:InitialHeapSize.
2790 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, (size_t)long_initial_heap_size) != Flag::SUCCESS) {
2791 return JNI_EINVAL;
2792 }
2793 // -Xmx
2794 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) {
2795 julong long_max_heap_size = 0;
2796 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1);
2797 if (errcode != arg_in_range) {
2798 jio_fprintf(defaultStream::error_stream(),
2799 "Invalid maximum heap size: %s\n", option->optionString);
2800 describe_range_error(errcode);
2801 return JNI_EINVAL;
2802 }
2803 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, (size_t)long_max_heap_size) != Flag::SUCCESS) {
2804 return JNI_EINVAL;
2805 }
2806 // Xmaxf
2807 } else if (match_option(option, "-Xmaxf", &tail)) {
2808 char* err;
2809 int maxf = (int)(strtod(tail, &err) * 100);
2810 if (*err != '\0' || *tail == '\0') {
2811 jio_fprintf(defaultStream::error_stream(),
2812 "Bad max heap free percentage size: %s\n",
2813 option->optionString);
2814 return JNI_EINVAL;
2815 } else {
2816 if (FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf) != Flag::SUCCESS) {
2817 return JNI_EINVAL;
2818 }
2819 }
2820 // Xminf
2821 } else if (match_option(option, "-Xminf", &tail)) {
2822 char* err;
2823 int minf = (int)(strtod(tail, &err) * 100);
2824 if (*err != '\0' || *tail == '\0') {
2825 jio_fprintf(defaultStream::error_stream(),
2826 "Bad min heap free percentage size: %s\n",
2827 option->optionString);
2828 return JNI_EINVAL;
2829 } else {
2830 if (FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf) != Flag::SUCCESS) {
2831 return JNI_EINVAL;
2832 }
2833 }
2834 // -Xss
2835 } else if (match_option(option, "-Xss", &tail)) {
2836 intx value = 0;
2837 jint err = parse_xss(option, tail, &value);
2838 if (err != JNI_OK) {
2839 return err;
2840 }
2841 if (FLAG_SET_CMDLINE(intx, ThreadStackSize, value) != Flag::SUCCESS) {
2842 return JNI_EINVAL;
2843 }
2844 } else if (match_option(option, "-Xmaxjitcodesize", &tail) ||
2845 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) {
2846 julong long_ReservedCodeCacheSize = 0;
2847
2848 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1);
2849 if (errcode != arg_in_range) {
2850 jio_fprintf(defaultStream::error_stream(),
2851 "Invalid maximum code cache size: %s.\n", option->optionString);
2852 return JNI_EINVAL;
2853 }
2854 if (FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != Flag::SUCCESS) {
2855 return JNI_EINVAL;
2856 }
2857 // -green
2858 } else if (match_option(option, "-green")) {
2859 jio_fprintf(defaultStream::error_stream(),
2860 "Green threads support not available\n");
2861 return JNI_EINVAL;
2862 // -native
2863 } else if (match_option(option, "-native")) {
2864 // HotSpot always uses native threads, ignore silently for compatibility
2865 // -Xrs
2866 } else if (match_option(option, "-Xrs")) {
2867 // Classic/EVM option, new functionality
2868 if (FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true) != Flag::SUCCESS) {
2869 return JNI_EINVAL;
2870 }
2871 // -Xprof
2872 } else if (match_option(option, "-Xprof")) {
2873 char version[256];
2874 // Obsolete in JDK 10
2875 JDK_Version::jdk(10).to_string(version, sizeof(version));
2876 warning("Ignoring option %s; support was removed in %s", option->optionString, version);
2877 // -Xconcurrentio
2878 } else if (match_option(option, "-Xconcurrentio")) {
2879 if (FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true) != Flag::SUCCESS) {
2880 return JNI_EINVAL;
2881 }
2882 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
2883 return JNI_EINVAL;
2884 }
2885 SafepointSynchronize::set_defer_thr_suspend_loop_count();
2886 if (FLAG_SET_CMDLINE(bool, UseTLAB, false) != Flag::SUCCESS) {
2887 return JNI_EINVAL;
2888 }
2889 if (FLAG_SET_CMDLINE(size_t, NewSizeThreadIncrease, 16 * K) != Flag::SUCCESS) { // 20Kb per thread added to new generation
2890 return JNI_EINVAL;
2891 }
2892
2893 // -Xinternalversion
2894 } else if (match_option(option, "-Xinternalversion")) {
2895 jio_fprintf(defaultStream::output_stream(), "%s\n",
2896 VM_Version::internal_vm_info_string());
2897 vm_exit(0);
2898 #ifndef PRODUCT
2899 // -Xprintflags
2900 } else if (match_option(option, "-Xprintflags")) {
2901 CommandLineFlags::printFlags(tty, false);
2902 vm_exit(0);
2903 #endif
2904 // -D
2905 } else if (match_option(option, "-D", &tail)) {
2906 const char* value;
2907 if (match_option(option, "-Djava.endorsed.dirs=", &value) &&
2908 *value!= '\0' && strcmp(value, "\"\"") != 0) {
2909 // abort if -Djava.endorsed.dirs is set
2910 jio_fprintf(defaultStream::output_stream(),
2911 "-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n"
2912 "in modular form will be supported via the concept of upgradeable modules.\n", value);
2913 return JNI_EINVAL;
2914 }
2915 if (match_option(option, "-Djava.ext.dirs=", &value) &&
2916 *value != '\0' && strcmp(value, "\"\"") != 0) {
2917 // abort if -Djava.ext.dirs is set
2918 jio_fprintf(defaultStream::output_stream(),
2919 "-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value);
2920 return JNI_EINVAL;
2921 }
2922 // Check for module related properties. They must be set using the modules
2923 // options. For example: use "--add-modules=java.sql", not
2924 // "-Djdk.module.addmods=java.sql"
2925 if (is_internal_module_property(option->optionString + 2)) {
2926 needs_module_property_warning = true;
2927 continue;
2928 }
2929
2930 if (!add_property(tail)) {
2931 return JNI_ENOMEM;
2932 }
2933 // Out of the box management support
2934 if (match_option(option, "-Dcom.sun.management", &tail)) {
2935 #if INCLUDE_MANAGEMENT
2936 if (FLAG_SET_CMDLINE(bool, ManagementServer, true) != Flag::SUCCESS) {
2937 return JNI_EINVAL;
2938 }
2939 // management agent in module jdk.management.agent
2940 if (!create_numbered_property("jdk.module.addmods", "jdk.management.agent", addmods_count++)) {
2941 return JNI_ENOMEM;
2942 }
2943 #else
2944 jio_fprintf(defaultStream::output_stream(),
2945 "-Dcom.sun.management is not supported in this VM.\n");
2946 return JNI_ERR;
2947 #endif
2948 }
2949 // -Xint
2950 } else if (match_option(option, "-Xint")) {
2951 set_mode_flags(_int);
2952 // -Xmixed
2953 } else if (match_option(option, "-Xmixed")) {
2954 set_mode_flags(_mixed);
2955 // -Xcomp
2956 } else if (match_option(option, "-Xcomp")) {
2957 // for testing the compiler; turn off all flags that inhibit compilation
2958 set_mode_flags(_comp);
2959 // -Xshare:dump
2960 } else if (match_option(option, "-Xshare:dump")) {
2961 if (FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true) != Flag::SUCCESS) {
2962 return JNI_EINVAL;
2963 }
2964 set_mode_flags(_int); // Prevent compilation, which creates objects
2965 // -Xshare:on
2966 } else if (match_option(option, "-Xshare:on")) {
2967 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
2968 return JNI_EINVAL;
2969 }
2970 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
2971 return JNI_EINVAL;
2972 }
2973 // -Xshare:auto
2974 } else if (match_option(option, "-Xshare:auto")) {
2975 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
2976 return JNI_EINVAL;
2977 }
2978 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
2979 return JNI_EINVAL;
2980 }
2981 // -Xshare:off
2982 } else if (match_option(option, "-Xshare:off")) {
2983 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, false) != Flag::SUCCESS) {
2984 return JNI_EINVAL;
2985 }
2986 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
2987 return JNI_EINVAL;
2988 }
2989 // -Xverify
2990 } else if (match_option(option, "-Xverify", &tail)) {
2991 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) {
2992 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true) != Flag::SUCCESS) {
2993 return JNI_EINVAL;
2994 }
2995 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
2996 return JNI_EINVAL;
2997 }
2998 } else if (strcmp(tail, ":remote") == 0) {
2999 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
3000 return JNI_EINVAL;
3001 }
3002 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
3003 return JNI_EINVAL;
3004 }
3005 } else if (strcmp(tail, ":none") == 0) {
3006 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
3007 return JNI_EINVAL;
3008 }
3009 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false) != Flag::SUCCESS) {
3010 return JNI_EINVAL;
3011 }
3012 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) {
3013 return JNI_EINVAL;
3014 }
3015 // -Xdebug
3016 } else if (match_option(option, "-Xdebug")) {
3017 // note this flag has been used, then ignore
3018 set_xdebug_mode(true);
3019 // -Xnoagent
3020 } else if (match_option(option, "-Xnoagent")) {
3021 // For compatibility with classic. HotSpot refuses to load the old style agent.dll.
3022 } else if (match_option(option, "-Xloggc:", &tail)) {
3023 // Deprecated flag to redirect GC output to a file. -Xloggc:<filename>
3024 log_warning(gc)("-Xloggc is deprecated. Will use -Xlog:gc:%s instead.", tail);
3025 _gc_log_filename = os::strdup_check_oom(tail);
3026 } else if (match_option(option, "-Xlog", &tail)) {
3027 bool ret = false;
3028 if (strcmp(tail, ":help") == 0) {
3029 fileStream stream(defaultStream::output_stream());
3030 LogConfiguration::print_command_line_help(&stream);
3031 vm_exit(0);
3032 } else if (strcmp(tail, ":disable") == 0) {
3033 LogConfiguration::disable_logging();
3034 ret = true;
3035 } else if (*tail == '\0') {
3036 ret = LogConfiguration::parse_command_line_arguments();
3037 assert(ret, "-Xlog without arguments should never fail to parse");
3038 } else if (*tail == ':') {
3039 ret = LogConfiguration::parse_command_line_arguments(tail + 1);
3040 }
3041 if (ret == false) {
3042 jio_fprintf(defaultStream::error_stream(),
3043 "Invalid -Xlog option '-Xlog%s', see error log for details.\n",
3044 tail);
3045 return JNI_EINVAL;
3046 }
3047 // JNI hooks
3048 } else if (match_option(option, "-Xcheck", &tail)) {
3049 if (!strcmp(tail, ":jni")) {
3050 #if !INCLUDE_JNI_CHECK
3051 warning("JNI CHECKING is not supported in this VM");
3052 #else
3053 CheckJNICalls = true;
3054 #endif // INCLUDE_JNI_CHECK
3055 } else if (is_bad_option(option, args->ignoreUnrecognized,
3056 "check")) {
3057 return JNI_EINVAL;
3058 }
3059 } else if (match_option(option, "vfprintf")) {
3060 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo);
3061 } else if (match_option(option, "exit")) {
3062 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo);
3063 } else if (match_option(option, "abort")) {
3064 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo);
3065 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure;
3066 // and the last option wins.
3067 } else if (match_option(option, "-XX:+NeverTenure")) {
3068 if (FLAG_SET_CMDLINE(bool, NeverTenure, true) != Flag::SUCCESS) {
3069 return JNI_EINVAL;
3070 }
3071 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
3072 return JNI_EINVAL;
3073 }
3074 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1) != Flag::SUCCESS) {
3075 return JNI_EINVAL;
3076 }
3077 } else if (match_option(option, "-XX:+AlwaysTenure")) {
3078 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3079 return JNI_EINVAL;
3080 }
3081 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
3082 return JNI_EINVAL;
3083 }
3084 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0) != Flag::SUCCESS) {
3085 return JNI_EINVAL;
3086 }
3087 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) {
3088 uintx max_tenuring_thresh = 0;
3089 if (!parse_uintx(tail, &max_tenuring_thresh, 0)) {
3090 jio_fprintf(defaultStream::error_stream(),
3091 "Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail);
3092 return JNI_EINVAL;
3093 }
3094
3095 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh) != Flag::SUCCESS) {
3096 return JNI_EINVAL;
3097 }
3098
3099 if (MaxTenuringThreshold == 0) {
3100 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3101 return JNI_EINVAL;
3102 }
3103 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
3104 return JNI_EINVAL;
3105 }
3106 } else {
3107 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3108 return JNI_EINVAL;
3109 }
3110 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
3111 return JNI_EINVAL;
3112 }
3113 }
3114 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) {
3115 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false) != Flag::SUCCESS) {
3116 return JNI_EINVAL;
3117 }
3118 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true) != Flag::SUCCESS) {
3119 return JNI_EINVAL;
3120 }
3121 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) {
3122 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false) != Flag::SUCCESS) {
3123 return JNI_EINVAL;
3124 }
3125 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true) != Flag::SUCCESS) {
3126 return JNI_EINVAL;
3127 }
3128 } else if (match_option(option, "-XX:+ExtendedDTraceProbes")) {
3129 #if defined(DTRACE_ENABLED)
3130 if (FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true) != Flag::SUCCESS) {
3131 return JNI_EINVAL;
3132 }
3133 if (FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true) != Flag::SUCCESS) {
3134 return JNI_EINVAL;
3135 }
3136 if (FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true) != Flag::SUCCESS) {
3137 return JNI_EINVAL;
3138 }
3139 if (FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true) != Flag::SUCCESS) {
3140 return JNI_EINVAL;
3141 }
3142 #else // defined(DTRACE_ENABLED)
3143 jio_fprintf(defaultStream::error_stream(),
3144 "ExtendedDTraceProbes flag is not applicable for this configuration\n");
3145 return JNI_EINVAL;
3146 #endif // defined(DTRACE_ENABLED)
3147 #ifdef ASSERT
3148 } else if (match_option(option, "-XX:+FullGCALot")) {
3149 if (FLAG_SET_CMDLINE(bool, FullGCALot, true) != Flag::SUCCESS) {
3150 return JNI_EINVAL;
3151 }
3152 // disable scavenge before parallel mark-compact
3153 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
3154 return JNI_EINVAL;
3155 }
3156 #endif
3157 #if !INCLUDE_MANAGEMENT
3158 } else if (match_option(option, "-XX:+ManagementServer")) {
3159 jio_fprintf(defaultStream::error_stream(),
3160 "ManagementServer is not supported in this VM.\n");
3161 return JNI_ERR;
3162 #endif // INCLUDE_MANAGEMENT
3163 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx
3164 // Skip -XX:Flags= and -XX:VMOptionsFile= since those cases have
3165 // already been handled
3166 if ((strncmp(tail, "Flags=", strlen("Flags=")) != 0) &&
3167 (strncmp(tail, "VMOptionsFile=", strlen("VMOptionsFile=")) != 0)) {
3168 if (!process_argument(tail, args->ignoreUnrecognized, origin)) {
3169 return JNI_EINVAL;
3170 }
3171 }
3172 // Unknown option
3173 } else if (is_bad_option(option, args->ignoreUnrecognized)) {
3174 return JNI_ERR;
3175 }
3176 }
3177
3178 // PrintSharedArchiveAndExit will turn on
3179 // -Xshare:on
3180 // -Xlog:class+path=info
3181 if (PrintSharedArchiveAndExit) {
3182 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
3183 return JNI_EINVAL;
3184 }
3185 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
3186 return JNI_EINVAL;
3187 }
3188 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, path));
3189 }
3190
3191 // Change the default value for flags which have different default values
3192 // when working with older JDKs.
3193 #ifdef LINUX
3194 if (JDK_Version::current().compare_major(6) <= 0 &&
3195 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) {
3196 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false);
3197 }
3198 #endif // LINUX
3199 fix_appclasspath();
3200 return JNI_OK;
3201 }
3202
3203 void Arguments::add_patch_mod_prefix(const char* module_name, const char* path, bool* patch_mod_javabase) {
3204 // For java.base check for duplicate --patch-module options being specified on the command line.
3205 // This check is only required for java.base, all other duplicate module specifications
3206 // will be checked during module system initialization. The module system initialization
3207 // will throw an ExceptionInInitializerError if this situation occurs.
3208 if (strcmp(module_name, JAVA_BASE_NAME) == 0) {
3209 if (*patch_mod_javabase) {
3210 vm_exit_during_initialization("Cannot specify " JAVA_BASE_NAME " more than once to --patch-module");
3211 } else {
3212 *patch_mod_javabase = true;
3213 }
3214 }
3215
3216 // Create GrowableArray lazily, only if --patch-module has been specified
3217 if (_patch_mod_prefix == NULL) {
3218 _patch_mod_prefix = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<ModulePatchPath*>(10, true);
3219 }
3220
3221 _patch_mod_prefix->push(new ModulePatchPath(module_name, path));
3222 }
3223
3224 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled)
3225 //
3226 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar
3227 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar".
3228 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty
3229 // path is treated as the current directory.
3230 //
3231 // This causes problems with CDS, which requires that all directories specified in the classpath
3232 // must be empty. In most cases, applications do NOT want to load classes from the current
3233 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up
3234 // scripts compatible with CDS.
3235 void Arguments::fix_appclasspath() {
3236 if (IgnoreEmptyClassPaths) {
3237 const char separator = *os::path_separator();
3238 const char* src = _java_class_path->value();
3239
3240 // skip over all the leading empty paths
3241 while (*src == separator) {
3242 src ++;
3243 }
3244
3245 char* copy = os::strdup_check_oom(src, mtArguments);
3246
3247 // trim all trailing empty paths
3248 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) {
3249 *tail = '\0';
3250 }
3251
3252 char from[3] = {separator, separator, '\0'};
3253 char to [2] = {separator, '\0'};
3254 while (StringUtils::replace_no_expand(copy, from, to) > 0) {
3255 // Keep replacing "::" -> ":" until we have no more "::" (non-windows)
3256 // Keep replacing ";;" -> ";" until we have no more ";;" (windows)
3257 }
3258
3259 _java_class_path->set_writeable_value(copy);
3260 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore
3261 }
3262 }
3263
3264 jint Arguments::finalize_vm_init_args(bool patch_mod_javabase) {
3265 // check if the default lib/endorsed directory exists; if so, error
3266 char path[JVM_MAXPATHLEN];
3267 const char* fileSep = os::file_separator();
3268 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep);
3269
3270 DIR* dir = os::opendir(path);
3271 if (dir != NULL) {
3272 jio_fprintf(defaultStream::output_stream(),
3273 "<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n"
3274 "in modular form will be supported via the concept of upgradeable modules.\n");
3275 os::closedir(dir);
3276 return JNI_ERR;
3277 }
3278
3279 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep);
3280 dir = os::opendir(path);
3281 if (dir != NULL) {
3282 jio_fprintf(defaultStream::output_stream(),
3283 "<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; "
3284 "Use -classpath instead.\n.");
3285 os::closedir(dir);
3286 return JNI_ERR;
3287 }
3288
3289 // This must be done after all arguments have been processed
3290 // and the container support has been initialized since AggressiveHeap
3291 // relies on the amount of total memory available.
3292 if (AggressiveHeap) {
3293 jint result = set_aggressive_heap_flags();
3294 if (result != JNI_OK) {
3295 return result;
3296 }
3297 }
3298
3299 // This must be done after all arguments have been processed.
3300 // java_compiler() true means set to "NONE" or empty.
3301 if (java_compiler() && !xdebug_mode()) {
3302 // For backwards compatibility, we switch to interpreted mode if
3303 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was
3304 // not specified.
3305 set_mode_flags(_int);
3306 }
3307
3308 // CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode),
3309 // but like -Xint, leave compilation thresholds unaffected.
3310 // With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well.
3311 if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) {
3312 set_mode_flags(_int);
3313 }
3314
3315 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set
3316 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) {
3317 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold);
3318 }
3319
3320 #if !defined(COMPILER2) && !INCLUDE_JVMCI
3321 // Don't degrade server performance for footprint
3322 if (FLAG_IS_DEFAULT(UseLargePages) &&
3323 MaxHeapSize < LargePageHeapSizeThreshold) {
3324 // No need for large granularity pages w/small heaps.
3325 // Note that large pages are enabled/disabled for both the
3326 // Java heap and the code cache.
3327 FLAG_SET_DEFAULT(UseLargePages, false);
3328 }
3329
3330 #elif defined(COMPILER2)
3331 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) {
3332 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1);
3333 }
3334 #endif
3335
3336 #if !defined(COMPILER2) && !INCLUDE_JVMCI
3337 UNSUPPORTED_OPTION(ProfileInterpreter);
3338 NOT_PRODUCT(UNSUPPORTED_OPTION(TraceProfileInterpreter));
3339 #endif
3340
3341 #ifndef TIERED
3342 // Tiered compilation is undefined.
3343 UNSUPPORTED_OPTION(TieredCompilation);
3344 #endif
3345
3346 #if INCLUDE_JVMCI
3347 if (EnableJVMCI &&
3348 !create_numbered_property("jdk.module.addmods", "jdk.internal.vm.ci", addmods_count++)) {
3349 return JNI_ENOMEM;
3350 }
3351 #endif
3352
3353 if (!check_vm_args_consistency()) {
3354 return JNI_ERR;
3355 }
3356
3357 #if INCLUDE_JVMCI
3358 if (UseJVMCICompiler) {
3359 Compilation_mode = CompMode_server;
3360 }
3361 #endif
3362
3363 #if INCLUDE_CDS
3364 if (DumpSharedSpaces) {
3365 // Disable biased locking now as it interferes with the clean up of
3366 // the archived Klasses and Java string objects (at dump time only).
3367 UseBiasedLocking = false;
3368
3369 // Always verify non-system classes during CDS dump
3370 if (!BytecodeVerificationRemote) {
3371 BytecodeVerificationRemote = true;
3372 log_info(cds)("All non-system classes will be verified (-Xverify:remote) during CDS dump time.");
3373 }
3374 }
3375 if (UseSharedSpaces && patch_mod_javabase) {
3376 no_shared_spaces("CDS is disabled when " JAVA_BASE_NAME " module is patched.");
3377 }
3378 if (UseSharedSpaces && !DumpSharedSpaces && check_unsupported_cds_runtime_properties()) {
3379 FLAG_SET_DEFAULT(UseSharedSpaces, false);
3380 }
3381 #endif
3382
3383 #ifndef CAN_SHOW_REGISTERS_ON_ASSERT
3384 UNSUPPORTED_OPTION(ShowRegistersOnAssert);
3385 #endif // CAN_SHOW_REGISTERS_ON_ASSERT
3386
3387 return JNI_OK;
3388 }
3389
3390 // Helper class for controlling the lifetime of JavaVMInitArgs
3391 // objects. The contents of the JavaVMInitArgs are guaranteed to be
3392 // deleted on the destruction of the ScopedVMInitArgs object.
3393 class ScopedVMInitArgs : public StackObj {
3394 private:
3395 JavaVMInitArgs _args;
3396 char* _container_name;
3397 bool _is_set;
3398 char* _vm_options_file_arg;
3399
3400 public:
3401 ScopedVMInitArgs(const char *container_name) {
3402 _args.version = JNI_VERSION_1_2;
3403 _args.nOptions = 0;
3404 _args.options = NULL;
3405 _args.ignoreUnrecognized = false;
3406 _container_name = (char *)container_name;
3407 _is_set = false;
3408 _vm_options_file_arg = NULL;
3409 }
3410
3411 // Populates the JavaVMInitArgs object represented by this
3412 // ScopedVMInitArgs object with the arguments in options. The
3413 // allocated memory is deleted by the destructor. If this method
3414 // returns anything other than JNI_OK, then this object is in a
3415 // partially constructed state, and should be abandoned.
3416 jint set_args(GrowableArray<JavaVMOption>* options) {
3417 _is_set = true;
3418 JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL(
3419 JavaVMOption, options->length(), mtArguments);
3420 if (options_arr == NULL) {
3421 return JNI_ENOMEM;
3422 }
3423 _args.options = options_arr;
3424
3425 for (int i = 0; i < options->length(); i++) {
3426 options_arr[i] = options->at(i);
3427 options_arr[i].optionString = os::strdup(options_arr[i].optionString);
3428 if (options_arr[i].optionString == NULL) {
3429 // Rely on the destructor to do cleanup.
3430 _args.nOptions = i;
3431 return JNI_ENOMEM;
3432 }
3433 }
3434
3435 _args.nOptions = options->length();
3436 _args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions;
3437 return JNI_OK;
3438 }
3439
3440 JavaVMInitArgs* get() { return &_args; }
3441 char* container_name() { return _container_name; }
3442 bool is_set() { return _is_set; }
3443 bool found_vm_options_file_arg() { return _vm_options_file_arg != NULL; }
3444 char* vm_options_file_arg() { return _vm_options_file_arg; }
3445
3446 void set_vm_options_file_arg(const char *vm_options_file_arg) {
3447 if (_vm_options_file_arg != NULL) {
3448 os::free(_vm_options_file_arg);
3449 }
3450 _vm_options_file_arg = os::strdup_check_oom(vm_options_file_arg);
3451 }
3452
3453 ~ScopedVMInitArgs() {
3454 if (_vm_options_file_arg != NULL) {
3455 os::free(_vm_options_file_arg);
3456 }
3457 if (_args.options == NULL) return;
3458 for (int i = 0; i < _args.nOptions; i++) {
3459 os::free(_args.options[i].optionString);
3460 }
3461 FREE_C_HEAP_ARRAY(JavaVMOption, _args.options);
3462 }
3463
3464 // Insert options into this option list, to replace option at
3465 // vm_options_file_pos (-XX:VMOptionsFile)
3466 jint insert(const JavaVMInitArgs* args,
3467 const JavaVMInitArgs* args_to_insert,
3468 const int vm_options_file_pos) {
3469 assert(_args.options == NULL, "shouldn't be set yet");
3470 assert(args_to_insert->nOptions != 0, "there should be args to insert");
3471 assert(vm_options_file_pos != -1, "vm_options_file_pos should be set");
3472
3473 int length = args->nOptions + args_to_insert->nOptions - 1;
3474 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments)
3475 GrowableArray<JavaVMOption>(length, true); // Construct new option array
3476 for (int i = 0; i < args->nOptions; i++) {
3477 if (i == vm_options_file_pos) {
3478 // insert the new options starting at the same place as the
3479 // -XX:VMOptionsFile option
3480 for (int j = 0; j < args_to_insert->nOptions; j++) {
3481 options->push(args_to_insert->options[j]);
3482 }
3483 } else {
3484 options->push(args->options[i]);
3485 }
3486 }
3487 // make into options array
3488 jint result = set_args(options);
3489 delete options;
3490 return result;
3491 }
3492 };
3493
3494 jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) {
3495 return parse_options_environment_variable("_JAVA_OPTIONS", args);
3496 }
3497
3498 jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) {
3499 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args);
3500 }
3501
3502 jint Arguments::parse_options_environment_variable(const char* name,
3503 ScopedVMInitArgs* vm_args) {
3504 char *buffer = ::getenv(name);
3505
3506 // Don't check this environment variable if user has special privileges
3507 // (e.g. unix su command).
3508 if (buffer == NULL || os::have_special_privileges()) {
3509 return JNI_OK;
3510 }
3511
3512 if ((buffer = os::strdup(buffer)) == NULL) {
3513 return JNI_ENOMEM;
3514 }
3515
3516 jio_fprintf(defaultStream::error_stream(),
3517 "Picked up %s: %s\n", name, buffer);
3518
3519 int retcode = parse_options_buffer(name, buffer, strlen(buffer), vm_args);
3520
3521 os::free(buffer);
3522 return retcode;
3523 }
3524
3525 jint Arguments::parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args) {
3526 // read file into buffer
3527 int fd = ::open(file_name, O_RDONLY);
3528 if (fd < 0) {
3529 jio_fprintf(defaultStream::error_stream(),
3530 "Could not open options file '%s'\n",
3531 file_name);
3532 return JNI_ERR;
3533 }
3534
3535 struct stat stbuf;
3536 int retcode = os::stat(file_name, &stbuf);
3537 if (retcode != 0) {
3538 jio_fprintf(defaultStream::error_stream(),
3539 "Could not stat options file '%s'\n",
3540 file_name);
3541 os::close(fd);
3542 return JNI_ERR;
3543 }
3544
3545 if (stbuf.st_size == 0) {
3546 // tell caller there is no option data and that is ok
3547 os::close(fd);
3548 return JNI_OK;
3549 }
3550
3551 // '+ 1' for NULL termination even with max bytes
3552 size_t bytes_alloc = stbuf.st_size + 1;
3553
3554 char *buf = NEW_C_HEAP_ARRAY_RETURN_NULL(char, bytes_alloc, mtArguments);
3555 if (NULL == buf) {
3556 jio_fprintf(defaultStream::error_stream(),
3557 "Could not allocate read buffer for options file parse\n");
3558 os::close(fd);
3559 return JNI_ENOMEM;
3560 }
3561
3562 memset(buf, 0, bytes_alloc);
3563
3564 // Fill buffer
3565 // Use ::read() instead of os::read because os::read()
3566 // might do a thread state transition
3567 // and it is too early for that here
3568
3569 ssize_t bytes_read = ::read(fd, (void *)buf, (unsigned)bytes_alloc);
3570 os::close(fd);
3571 if (bytes_read < 0) {
3572 FREE_C_HEAP_ARRAY(char, buf);
3573 jio_fprintf(defaultStream::error_stream(),
3574 "Could not read options file '%s'\n", file_name);
3575 return JNI_ERR;
3576 }
3577
3578 if (bytes_read == 0) {
3579 // tell caller there is no option data and that is ok
3580 FREE_C_HEAP_ARRAY(char, buf);
3581 return JNI_OK;
3582 }
3583
3584 retcode = parse_options_buffer(file_name, buf, bytes_read, vm_args);
3585
3586 FREE_C_HEAP_ARRAY(char, buf);
3587 return retcode;
3588 }
3589
3590 jint Arguments::parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args) {
3591 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<JavaVMOption>(2, true); // Construct option array
3592
3593 // some pointers to help with parsing
3594 char *buffer_end = buffer + buf_len;
3595 char *opt_hd = buffer;
3596 char *wrt = buffer;
3597 char *rd = buffer;
3598
3599 // parse all options
3600 while (rd < buffer_end) {
3601 // skip leading white space from the input string
3602 while (rd < buffer_end && isspace(*rd)) {
3603 rd++;
3604 }
3605
3606 if (rd >= buffer_end) {
3607 break;
3608 }
3609
3610 // Remember this is where we found the head of the token.
3611 opt_hd = wrt;
3612
3613 // Tokens are strings of non white space characters separated
3614 // by one or more white spaces.
3615 while (rd < buffer_end && !isspace(*rd)) {
3616 if (*rd == '\'' || *rd == '"') { // handle a quoted string
3617 int quote = *rd; // matching quote to look for
3618 rd++; // don't copy open quote
3619 while (rd < buffer_end && *rd != quote) {
3620 // include everything (even spaces)
3621 // up until the close quote
3622 *wrt++ = *rd++; // copy to option string
3623 }
3624
3625 if (rd < buffer_end) {
3626 rd++; // don't copy close quote
3627 } else {
3628 // did not see closing quote
3629 jio_fprintf(defaultStream::error_stream(),
3630 "Unmatched quote in %s\n", name);
3631 delete options;
3632 return JNI_ERR;
3633 }
3634 } else {
3635 *wrt++ = *rd++; // copy to option string
3636 }
3637 }
3638
3639 // steal a white space character and set it to NULL
3640 *wrt++ = '\0';
3641 // We now have a complete token
3642
3643 JavaVMOption option;
3644 option.optionString = opt_hd;
3645 option.extraInfo = NULL;
3646
3647 options->append(option); // Fill in option
3648
3649 rd++; // Advance to next character
3650 }
3651
3652 // Fill out JavaVMInitArgs structure.
3653 jint status = vm_args->set_args(options);
3654
3655 delete options;
3656 return status;
3657 }
3658
3659 void Arguments::set_shared_spaces_flags() {
3660 if (DumpSharedSpaces) {
3661 if (FailOverToOldVerifier) {
3662 // Don't fall back to the old verifier on verification failure. If a
3663 // class fails verification with the split verifier, it might fail the
3664 // CDS runtime verifier constraint check. In that case, we don't want
3665 // to share the class. We only archive classes that pass the split verifier.
3666 FLAG_SET_DEFAULT(FailOverToOldVerifier, false);
3667 }
3668
3669 if (RequireSharedSpaces) {
3670 warning("Cannot dump shared archive while using shared archive");
3671 }
3672 UseSharedSpaces = false;
3673 #ifdef _LP64
3674 if (!UseCompressedOops || !UseCompressedClassPointers) {
3675 vm_exit_during_initialization(
3676 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL);
3677 }
3678 } else {
3679 if (!UseCompressedOops || !UseCompressedClassPointers) {
3680 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces.");
3681 }
3682 #endif
3683 }
3684 }
3685
3686 // Sharing support
3687 // Construct the path to the archive
3688 static char* get_shared_archive_path() {
3689 char *shared_archive_path;
3690 if (SharedArchiveFile == NULL) {
3691 char jvm_path[JVM_MAXPATHLEN];
3692 os::jvm_path(jvm_path, sizeof(jvm_path));
3693 char *end = strrchr(jvm_path, *os::file_separator());
3694 if (end != NULL) *end = '\0';
3695 size_t jvm_path_len = strlen(jvm_path);
3696 size_t file_sep_len = strlen(os::file_separator());
3697 const size_t len = jvm_path_len + file_sep_len + 20;
3698 shared_archive_path = NEW_C_HEAP_ARRAY(char, len, mtArguments);
3699 if (shared_archive_path != NULL) {
3700 jio_snprintf(shared_archive_path, len, "%s%sclasses.jsa",
3701 jvm_path, os::file_separator());
3702 }
3703 } else {
3704 shared_archive_path = os::strdup_check_oom(SharedArchiveFile, mtArguments);
3705 }
3706 return shared_archive_path;
3707 }
3708
3709 #ifndef PRODUCT
3710 // Determine whether LogVMOutput should be implicitly turned on.
3711 static bool use_vm_log() {
3712 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) ||
3713 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods ||
3714 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers ||
3715 PrintAssembly || TraceDeoptimization || TraceDependencies ||
3716 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) {
3717 return true;
3718 }
3719
3720 #ifdef COMPILER1
3721 if (PrintC1Statistics) {
3722 return true;
3723 }
3724 #endif // COMPILER1
3725
3726 #ifdef COMPILER2
3727 if (PrintOptoAssembly || PrintOptoStatistics) {
3728 return true;
3729 }
3730 #endif // COMPILER2
3731
3732 return false;
3733 }
3734
3735 #endif // PRODUCT
3736
3737 bool Arguments::args_contains_vm_options_file_arg(const JavaVMInitArgs* args) {
3738 for (int index = 0; index < args->nOptions; index++) {
3739 const JavaVMOption* option = args->options + index;
3740 const char* tail;
3741 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
3742 return true;
3743 }
3744 }
3745 return false;
3746 }
3747
3748 jint Arguments::insert_vm_options_file(const JavaVMInitArgs* args,
3749 const char* vm_options_file,
3750 const int vm_options_file_pos,
3751 ScopedVMInitArgs* vm_options_file_args,
3752 ScopedVMInitArgs* args_out) {
3753 jint code = parse_vm_options_file(vm_options_file, vm_options_file_args);
3754 if (code != JNI_OK) {
3755 return code;
3756 }
3757
3758 if (vm_options_file_args->get()->nOptions < 1) {
3759 return JNI_OK;
3760 }
3761
3762 if (args_contains_vm_options_file_arg(vm_options_file_args->get())) {
3763 jio_fprintf(defaultStream::error_stream(),
3764 "A VM options file may not refer to a VM options file. "
3765 "Specification of '-XX:VMOptionsFile=<file-name>' in the "
3766 "options file '%s' in options container '%s' is an error.\n",
3767 vm_options_file_args->vm_options_file_arg(),
3768 vm_options_file_args->container_name());
3769 return JNI_EINVAL;
3770 }
3771
3772 return args_out->insert(args, vm_options_file_args->get(),
3773 vm_options_file_pos);
3774 }
3775
3776 // Expand -XX:VMOptionsFile found in args_in as needed.
3777 // mod_args and args_out parameters may return values as needed.
3778 jint Arguments::expand_vm_options_as_needed(const JavaVMInitArgs* args_in,
3779 ScopedVMInitArgs* mod_args,
3780 JavaVMInitArgs** args_out) {
3781 jint code = match_special_option_and_act(args_in, mod_args);
3782 if (code != JNI_OK) {
3783 return code;
3784 }
3785
3786 if (mod_args->is_set()) {
3787 // args_in contains -XX:VMOptionsFile and mod_args contains the
3788 // original options from args_in along with the options expanded
3789 // from the VMOptionsFile. Return a short-hand to the caller.
3790 *args_out = mod_args->get();
3791 } else {
3792 *args_out = (JavaVMInitArgs *)args_in; // no changes so use args_in
3793 }
3794 return JNI_OK;
3795 }
3796
3797 jint Arguments::match_special_option_and_act(const JavaVMInitArgs* args,
3798 ScopedVMInitArgs* args_out) {
3799 // Remaining part of option string
3800 const char* tail;
3801 ScopedVMInitArgs vm_options_file_args(args_out->container_name());
3802
3803 for (int index = 0; index < args->nOptions; index++) {
3804 const JavaVMOption* option = args->options + index;
3805 if (ArgumentsExt::process_options(option)) {
3806 continue;
3807 }
3808 if (match_option(option, "-XX:Flags=", &tail)) {
3809 Arguments::set_jvm_flags_file(tail);
3810 continue;
3811 }
3812 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
3813 if (vm_options_file_args.found_vm_options_file_arg()) {
3814 jio_fprintf(defaultStream::error_stream(),
3815 "The option '%s' is already specified in the options "
3816 "container '%s' so the specification of '%s' in the "
3817 "same options container is an error.\n",
3818 vm_options_file_args.vm_options_file_arg(),
3819 vm_options_file_args.container_name(),
3820 option->optionString);
3821 return JNI_EINVAL;
3822 }
3823 vm_options_file_args.set_vm_options_file_arg(option->optionString);
3824 // If there's a VMOptionsFile, parse that
3825 jint code = insert_vm_options_file(args, tail, index,
3826 &vm_options_file_args, args_out);
3827 if (code != JNI_OK) {
3828 return code;
3829 }
3830 args_out->set_vm_options_file_arg(vm_options_file_args.vm_options_file_arg());
3831 if (args_out->is_set()) {
3832 // The VMOptions file inserted some options so switch 'args'
3833 // to the new set of options, and continue processing which
3834 // preserves "last option wins" semantics.
3835 args = args_out->get();
3836 // The first option from the VMOptionsFile replaces the
3837 // current option. So we back track to process the
3838 // replacement option.
3839 index--;
3840 }
3841 continue;
3842 }
3843 if (match_option(option, "-XX:+PrintVMOptions")) {
3844 PrintVMOptions = true;
3845 continue;
3846 }
3847 if (match_option(option, "-XX:-PrintVMOptions")) {
3848 PrintVMOptions = false;
3849 continue;
3850 }
3851 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) {
3852 IgnoreUnrecognizedVMOptions = true;
3853 continue;
3854 }
3855 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) {
3856 IgnoreUnrecognizedVMOptions = false;
3857 continue;
3858 }
3859 if (match_option(option, "-XX:+PrintFlagsInitial")) {
3860 CommandLineFlags::printFlags(tty, false);
3861 vm_exit(0);
3862 }
3863 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) {
3864 #if INCLUDE_NMT
3865 // The launcher did not setup nmt environment variable properly.
3866 if (!MemTracker::check_launcher_nmt_support(tail)) {
3867 warning("Native Memory Tracking did not setup properly, using wrong launcher?");
3868 }
3869
3870 // Verify if nmt option is valid.
3871 if (MemTracker::verify_nmt_option()) {
3872 // Late initialization, still in single-threaded mode.
3873 if (MemTracker::tracking_level() >= NMT_summary) {
3874 MemTracker::init();
3875 }
3876 } else {
3877 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL);
3878 }
3879 continue;
3880 #else
3881 jio_fprintf(defaultStream::error_stream(),
3882 "Native Memory Tracking is not supported in this VM\n");
3883 return JNI_ERR;
3884 #endif
3885 }
3886
3887 #ifndef PRODUCT
3888 if (match_option(option, "-XX:+PrintFlagsWithComments")) {
3889 CommandLineFlags::printFlags(tty, true);
3890 vm_exit(0);
3891 }
3892 #endif
3893 }
3894 return JNI_OK;
3895 }
3896
3897 static void print_options(const JavaVMInitArgs *args) {
3898 const char* tail;
3899 for (int index = 0; index < args->nOptions; index++) {
3900 const JavaVMOption *option = args->options + index;
3901 if (match_option(option, "-XX:", &tail)) {
3902 logOption(tail);
3903 }
3904 }
3905 }
3906
3907 bool Arguments::handle_deprecated_print_gc_flags() {
3908 if (PrintGC) {
3909 log_warning(gc)("-XX:+PrintGC is deprecated. Will use -Xlog:gc instead.");
3910 }
3911 if (PrintGCDetails) {
3912 log_warning(gc)("-XX:+PrintGCDetails is deprecated. Will use -Xlog:gc* instead.");
3913 }
3914
3915 if (_gc_log_filename != NULL) {
3916 // -Xloggc was used to specify a filename
3917 const char* gc_conf = PrintGCDetails ? "gc*" : "gc";
3918
3919 LogTarget(Error, logging) target;
3920 LogStream errstream(target);
3921 return LogConfiguration::parse_log_arguments(_gc_log_filename, gc_conf, NULL, NULL, &errstream);
3922 } else if (PrintGC || PrintGCDetails) {
3923 LogConfiguration::configure_stdout(LogLevel::Info, !PrintGCDetails, LOG_TAGS(gc));
3924 }
3925 return true;
3926 }
3927
3928 void Arguments::handle_extra_cms_flags(const char* msg) {
3929 SpecialFlag flag;
3930 const char *flag_name = "UseConcMarkSweepGC";
3931 if (lookup_special_flag(flag_name, flag)) {
3932 handle_aliases_and_deprecation(flag_name, /* print warning */ true);
3933 warning("%s", msg);
3934 }
3935 }
3936
3937 // Parse entry point called from JNI_CreateJavaVM
3938
3939 jint Arguments::parse(const JavaVMInitArgs* initial_cmd_args) {
3940 assert(verify_special_jvm_flags(), "deprecated and obsolete flag table inconsistent");
3941
3942 // Initialize ranges, constraints and writeables
3943 CommandLineFlagRangeList::init();
3944 CommandLineFlagConstraintList::init();
3945 CommandLineFlagWriteableList::init();
3946
3947 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed.
3948 const char* hotspotrc = ".hotspotrc";
3949 bool settings_file_specified = false;
3950 bool needs_hotspotrc_warning = false;
3951 ScopedVMInitArgs initial_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
3952 ScopedVMInitArgs initial_java_options_args("env_var='_JAVA_OPTIONS'");
3953
3954 // Pointers to current working set of containers
3955 JavaVMInitArgs* cur_cmd_args;
3956 JavaVMInitArgs* cur_java_options_args;
3957 JavaVMInitArgs* cur_java_tool_options_args;
3958
3959 // Containers for modified/expanded options
3960 ScopedVMInitArgs mod_cmd_args("cmd_line_args");
3961 ScopedVMInitArgs mod_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
3962 ScopedVMInitArgs mod_java_options_args("env_var='_JAVA_OPTIONS'");
3963
3964
3965 jint code =
3966 parse_java_tool_options_environment_variable(&initial_java_tool_options_args);
3967 if (code != JNI_OK) {
3968 return code;
3969 }
3970
3971 code = parse_java_options_environment_variable(&initial_java_options_args);
3972 if (code != JNI_OK) {
3973 return code;
3974 }
3975
3976 code = expand_vm_options_as_needed(initial_java_tool_options_args.get(),
3977 &mod_java_tool_options_args,
3978 &cur_java_tool_options_args);
3979 if (code != JNI_OK) {
3980 return code;
3981 }
3982
3983 code = expand_vm_options_as_needed(initial_cmd_args,
3984 &mod_cmd_args,
3985 &cur_cmd_args);
3986 if (code != JNI_OK) {
3987 return code;
3988 }
3989
3990 code = expand_vm_options_as_needed(initial_java_options_args.get(),
3991 &mod_java_options_args,
3992 &cur_java_options_args);
3993 if (code != JNI_OK) {
3994 return code;
3995 }
3996
3997 const char* flags_file = Arguments::get_jvm_flags_file();
3998 settings_file_specified = (flags_file != NULL);
3999
4000 if (IgnoreUnrecognizedVMOptions) {
4001 cur_cmd_args->ignoreUnrecognized = true;
4002 cur_java_tool_options_args->ignoreUnrecognized = true;
4003 cur_java_options_args->ignoreUnrecognized = true;
4004 }
4005
4006 // Parse specified settings file
4007 if (settings_file_specified) {
4008 if (!process_settings_file(flags_file, true,
4009 cur_cmd_args->ignoreUnrecognized)) {
4010 return JNI_EINVAL;
4011 }
4012 } else {
4013 #ifdef ASSERT
4014 // Parse default .hotspotrc settings file
4015 if (!process_settings_file(".hotspotrc", false,
4016 cur_cmd_args->ignoreUnrecognized)) {
4017 return JNI_EINVAL;
4018 }
4019 #else
4020 struct stat buf;
4021 if (os::stat(hotspotrc, &buf) == 0) {
4022 needs_hotspotrc_warning = true;
4023 }
4024 #endif
4025 }
4026
4027 if (PrintVMOptions) {
4028 print_options(cur_java_tool_options_args);
4029 print_options(cur_cmd_args);
4030 print_options(cur_java_options_args);
4031 }
4032
4033 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS
4034 jint result = parse_vm_init_args(cur_java_tool_options_args,
4035 cur_java_options_args,
4036 cur_cmd_args);
4037
4038 if (result != JNI_OK) {
4039 return result;
4040 }
4041
4042 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed.
4043 SharedArchivePath = get_shared_archive_path();
4044 if (SharedArchivePath == NULL) {
4045 return JNI_ENOMEM;
4046 }
4047
4048 // Set up VerifySharedSpaces
4049 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) {
4050 VerifySharedSpaces = true;
4051 }
4052
4053 // Delay warning until here so that we've had a chance to process
4054 // the -XX:-PrintWarnings flag
4055 if (needs_hotspotrc_warning) {
4056 warning("%s file is present but has been ignored. "
4057 "Run with -XX:Flags=%s to load the file.",
4058 hotspotrc, hotspotrc);
4059 }
4060
4061 if (needs_module_property_warning) {
4062 warning("Ignoring system property options whose names match the '-Djdk.module.*'."
4063 " names that are reserved for internal use.");
4064 }
4065
4066 #if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
4067 UNSUPPORTED_OPTION(UseLargePages);
4068 #endif
4069
4070 ArgumentsExt::report_unsupported_options();
4071
4072 #ifndef PRODUCT
4073 if (TraceBytecodesAt != 0) {
4074 TraceBytecodes = true;
4075 }
4076 if (CountCompiledCalls) {
4077 if (UseCounterDecay) {
4078 warning("UseCounterDecay disabled because CountCalls is set");
4079 UseCounterDecay = false;
4080 }
4081 }
4082 #endif // PRODUCT
4083
4084 if (ScavengeRootsInCode == 0) {
4085 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) {
4086 warning("Forcing ScavengeRootsInCode non-zero");
4087 }
4088 ScavengeRootsInCode = 1;
4089 }
4090
4091 if (!handle_deprecated_print_gc_flags()) {
4092 return JNI_EINVAL;
4093 }
4094
4095 // Set object alignment values.
4096 set_object_alignment();
4097
4098 #if !INCLUDE_CDS
4099 if (DumpSharedSpaces || RequireSharedSpaces) {
4100 jio_fprintf(defaultStream::error_stream(),
4101 "Shared spaces are not supported in this VM\n");
4102 return JNI_ERR;
4103 }
4104 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) ||
4105 log_is_enabled(Info, cds)) {
4106 warning("Shared spaces are not supported in this VM");
4107 FLAG_SET_DEFAULT(UseSharedSpaces, false);
4108 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(cds));
4109 }
4110 no_shared_spaces("CDS Disabled");
4111 #endif // INCLUDE_CDS
4112
4113 return JNI_OK;
4114 }
4115
4116 jint Arguments::apply_ergo() {
4117 // Set flags based on ergonomics.
4118 jint result = set_ergonomics_flags();
4119 if (result != JNI_OK) return result;
4120
4121 #if INCLUDE_JVMCI
4122 set_jvmci_specific_flags();
4123 #endif
4124
4125 set_shared_spaces_flags();
4126
4127 if (TieredCompilation) {
4128 set_tiered_flags();
4129 } else {
4130 int max_compilation_policy_choice = 1;
4131 #ifdef COMPILER2
4132 if (is_server_compilation_mode_vm()) {
4133 max_compilation_policy_choice = 2;
4134 }
4135 #endif
4136 // Check if the policy is valid.
4137 if (CompilationPolicyChoice >= max_compilation_policy_choice) {
4138 vm_exit_during_initialization(
4139 "Incompatible compilation policy selected", NULL);
4140 }
4141 // Scale CompileThreshold
4142 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves CompileThreshold unchanged.
4143 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
4144 FLAG_SET_ERGO(intx, CompileThreshold, scaled_compile_threshold(CompileThreshold));
4145 }
4146 }
4147
4148 #ifdef COMPILER2
4149 #ifndef PRODUCT
4150 if (PrintIdealGraphLevel > 0) {
4151 FLAG_SET_ERGO(bool, PrintIdealGraph, true);
4152 }
4153 #endif
4154 #endif
4155
4156 // Set heap size based on available physical memory
4157 set_heap_size();
4158
4159 GCConfig::arguments()->initialize();
4160
4161 // Initialize Metaspace flags and alignments
4162 Metaspace::ergo_initialize();
4163
4164 // Set bytecode rewriting flags
4165 set_bytecode_flags();
4166
4167 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled
4168 jint code = set_aggressive_opts_flags();
4169 if (code != JNI_OK) {
4170 return code;
4171 }
4172
4173 // Turn off biased locking for locking debug mode flags,
4174 // which are subtly different from each other but neither works with
4175 // biased locking
4176 if (UseHeavyMonitors
4177 #ifdef COMPILER1
4178 || !UseFastLocking
4179 #endif // COMPILER1
4180 #if INCLUDE_JVMCI
4181 || !JVMCIUseFastLocking
4182 #endif
4183 ) {
4184 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) {
4185 // flag set to true on command line; warn the user that they
4186 // can't enable biased locking here
4187 warning("Biased Locking is not supported with locking debug flags"
4188 "; ignoring UseBiasedLocking flag." );
4189 }
4190 UseBiasedLocking = false;
4191 }
4192
4193 #ifdef CC_INTERP
4194 // Clear flags not supported on zero.
4195 FLAG_SET_DEFAULT(ProfileInterpreter, false);
4196 FLAG_SET_DEFAULT(UseBiasedLocking, false);
4197 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false));
4198 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false));
4199 #endif // CC_INTERP
4200
4201 #ifdef COMPILER2
4202 if (!EliminateLocks) {
4203 EliminateNestedLocks = false;
4204 }
4205 if (!Inline) {
4206 IncrementalInline = false;
4207 }
4208 #ifndef PRODUCT
4209 if (!IncrementalInline) {
4210 AlwaysIncrementalInline = false;
4211 }
4212 #endif
4213 if (!UseTypeSpeculation && FLAG_IS_DEFAULT(TypeProfileLevel)) {
4214 // nothing to use the profiling, turn if off
4215 FLAG_SET_DEFAULT(TypeProfileLevel, 0);
4216 }
4217 if (FLAG_IS_DEFAULT(LoopStripMiningIterShortLoop)) {
4218 // blind guess
4219 LoopStripMiningIterShortLoop = LoopStripMiningIter / 10;
4220 }
4221 #endif
4222
4223 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) {
4224 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output");
4225 DebugNonSafepoints = true;
4226 }
4227
4228 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) {
4229 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used");
4230 }
4231
4232 if (UseOnStackReplacement && !UseLoopCounter) {
4233 warning("On-stack-replacement requires loop counters; enabling loop counters");
4234 FLAG_SET_DEFAULT(UseLoopCounter, true);
4235 }
4236
4237 #ifndef PRODUCT
4238 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) {
4239 if (use_vm_log()) {
4240 LogVMOutput = true;
4241 }
4242 }
4243 #endif // PRODUCT
4244
4245 if (PrintCommandLineFlags) {
4246 CommandLineFlags::printSetFlags(tty);
4247 }
4248
4249 // Apply CPU specific policy for the BiasedLocking
4250 if (UseBiasedLocking) {
4251 if (!VM_Version::use_biased_locking() &&
4252 !(FLAG_IS_CMDLINE(UseBiasedLocking))) {
4253 UseBiasedLocking = false;
4254 }
4255 }
4256 #ifdef COMPILER2
4257 if (!UseBiasedLocking || EmitSync != 0) {
4258 UseOptoBiasInlining = false;
4259 }
4260 #endif
4261
4262 // ThreadLocalHandshakesConstraintFunc handles the constraints.
4263 if (FLAG_IS_DEFAULT(ThreadLocalHandshakes) || !SafepointMechanism::supports_thread_local_poll()) {
4264 log_debug(ergo)("ThreadLocalHandshakes %s", ThreadLocalHandshakes ? "enabled." : "disabled.");
4265 } else {
4266 log_info(ergo)("ThreadLocalHandshakes %s", ThreadLocalHandshakes ? "enabled." : "disabled.");
4267 }
4268
4269 return JNI_OK;
4270 }
4271
4272 jint Arguments::adjust_after_os() {
4273 if (UseNUMA) {
4274 if (!FLAG_IS_DEFAULT(AllocateHeapAt)) {
4275 FLAG_SET_ERGO(bool, UseNUMA, false);
4276 } else if (UseParallelGC || UseParallelOldGC) {
4277 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) {
4278 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M);
4279 }
4280 }
4281 // UseNUMAInterleaving is set to ON for all collectors and
4282 // platforms when UseNUMA is set to ON. NUMA-aware collectors
4283 // such as the parallel collector for Linux and Solaris will
4284 // interleave old gen and survivor spaces on top of NUMA
4285 // allocation policy for the eden space.
4286 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on
4287 // all platforms and ParallelGC on Windows will interleave all
4288 // of the heap spaces across NUMA nodes.
4289 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) {
4290 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true);
4291 }
4292 }
4293 return JNI_OK;
4294 }
4295
4296 int Arguments::PropertyList_count(SystemProperty* pl) {
4297 int count = 0;
4298 while(pl != NULL) {
4299 count++;
4300 pl = pl->next();
4301 }
4302 return count;
4303 }
4304
4305 // Return the number of readable properties.
4306 int Arguments::PropertyList_readable_count(SystemProperty* pl) {
4307 int count = 0;
4308 while(pl != NULL) {
4309 if (pl->is_readable()) {
4310 count++;
4311 }
4312 pl = pl->next();
4313 }
4314 return count;
4315 }
4316
4317 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) {
4318 assert(key != NULL, "just checking");
4319 SystemProperty* prop;
4320 for (prop = pl; prop != NULL; prop = prop->next()) {
4321 if (strcmp(key, prop->key()) == 0) return prop->value();
4322 }
4323 return NULL;
4324 }
4325
4326 // Return the value of the requested property provided that it is a readable property.
4327 const char* Arguments::PropertyList_get_readable_value(SystemProperty *pl, const char* key) {
4328 assert(key != NULL, "just checking");
4329 SystemProperty* prop;
4330 // Return the property value if the keys match and the property is not internal or
4331 // it's the special internal property "jdk.boot.class.path.append".
4332 for (prop = pl; prop != NULL; prop = prop->next()) {
4333 if (strcmp(key, prop->key()) == 0) {
4334 if (!prop->internal()) {
4335 return prop->value();
4336 } else if (strcmp(key, "jdk.boot.class.path.append") == 0) {
4337 return prop->value();
4338 } else {
4339 // Property is internal and not jdk.boot.class.path.append so return NULL.
4340 return NULL;
4341 }
4342 }
4343 }
4344 return NULL;
4345 }
4346
4347 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) {
4348 int count = 0;
4349 const char* ret_val = NULL;
4350
4351 while(pl != NULL) {
4352 if(count >= index) {
4353 ret_val = pl->key();
4354 break;
4355 }
4356 count++;
4357 pl = pl->next();
4358 }
4359
4360 return ret_val;
4361 }
4362
4363 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) {
4364 int count = 0;
4365 char* ret_val = NULL;
4366
4367 while(pl != NULL) {
4368 if(count >= index) {
4369 ret_val = pl->value();
4370 break;
4371 }
4372 count++;
4373 pl = pl->next();
4374 }
4375
4376 return ret_val;
4377 }
4378
4379 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) {
4380 SystemProperty* p = *plist;
4381 if (p == NULL) {
4382 *plist = new_p;
4383 } else {
4384 while (p->next() != NULL) {
4385 p = p->next();
4386 }
4387 p->set_next(new_p);
4388 }
4389 }
4390
4391 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v,
4392 bool writeable, bool internal) {
4393 if (plist == NULL)
4394 return;
4395
4396 SystemProperty* new_p = new SystemProperty(k, v, writeable, internal);
4397 PropertyList_add(plist, new_p);
4398 }
4399
4400 void Arguments::PropertyList_add(SystemProperty *element) {
4401 PropertyList_add(&_system_properties, element);
4402 }
4403
4404 // This add maintains unique property key in the list.
4405 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v,
4406 PropertyAppendable append, PropertyWriteable writeable,
4407 PropertyInternal internal) {
4408 if (plist == NULL)
4409 return;
4410
4411 // If property key exist then update with new value.
4412 SystemProperty* prop;
4413 for (prop = *plist; prop != NULL; prop = prop->next()) {
4414 if (strcmp(k, prop->key()) == 0) {
4415 if (append == AppendProperty) {
4416 prop->append_value(v);
4417 } else {
4418 prop->set_value(v);
4419 }
4420 return;
4421 }
4422 }
4423
4424 PropertyList_add(plist, k, v, writeable == WriteableProperty, internal == InternalProperty);
4425 }
4426
4427 // Copies src into buf, replacing "%%" with "%" and "%p" with pid
4428 // Returns true if all of the source pointed by src has been copied over to
4429 // the destination buffer pointed by buf. Otherwise, returns false.
4430 // Notes:
4431 // 1. If the length (buflen) of the destination buffer excluding the
4432 // NULL terminator character is not long enough for holding the expanded
4433 // pid characters, it also returns false instead of returning the partially
4434 // expanded one.
4435 // 2. The passed in "buflen" should be large enough to hold the null terminator.
4436 bool Arguments::copy_expand_pid(const char* src, size_t srclen,
4437 char* buf, size_t buflen) {
4438 const char* p = src;
4439 char* b = buf;
4440 const char* src_end = &src[srclen];
4441 char* buf_end = &buf[buflen - 1];
4442
4443 while (p < src_end && b < buf_end) {
4444 if (*p == '%') {
4445 switch (*(++p)) {
4446 case '%': // "%%" ==> "%"
4447 *b++ = *p++;
4448 break;
4449 case 'p': { // "%p" ==> current process id
4450 // buf_end points to the character before the last character so
4451 // that we could write '\0' to the end of the buffer.
4452 size_t buf_sz = buf_end - b + 1;
4453 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id());
4454
4455 // if jio_snprintf fails or the buffer is not long enough to hold
4456 // the expanded pid, returns false.
4457 if (ret < 0 || ret >= (int)buf_sz) {
4458 return false;
4459 } else {
4460 b += ret;
4461 assert(*b == '\0', "fail in copy_expand_pid");
4462 if (p == src_end && b == buf_end + 1) {
4463 // reach the end of the buffer.
4464 return true;
4465 }
4466 }
4467 p++;
4468 break;
4469 }
4470 default :
4471 *b++ = '%';
4472 }
4473 } else {
4474 *b++ = *p++;
4475 }
4476 }
4477 *b = '\0';
4478 return (p == src_end); // return false if not all of the source was copied
4479 }