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/gcArguments.hpp"
33 #include "gc/shared/genCollectedHeap.hpp"
34 #include "gc/shared/referenceProcessor.hpp"
35 #include "gc/shared/taskqueue.hpp"
36 #include "logging/log.hpp"
37 #include "logging/logConfiguration.hpp"
38 #include "logging/logStream.hpp"
39 #include "logging/logTag.hpp"
40 #include "memory/allocation.inline.hpp"
41 #include "memory/universe.inline.hpp"
42 #include "oops/oop.inline.hpp"
43 #include "prims/jvmtiExport.hpp"
44 #include "runtime/arguments.hpp"
45 #include "runtime/arguments_ext.hpp"
46 #include "runtime/commandLineFlagConstraintList.hpp"
47 #include "runtime/commandLineFlagWriteableList.hpp"
48 #include "runtime/commandLineFlagRangeList.hpp"
49 #include "runtime/globals.hpp"
50 #include "runtime/globals_extension.hpp"
51 #include "runtime/java.hpp"
52 #include "runtime/os.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 char* Arguments::SharedArchivePath = NULL;
100
101 AgentLibraryList Arguments::_libraryList;
102 AgentLibraryList Arguments::_agentList;
103
104 abort_hook_t Arguments::_abort_hook = NULL;
105 exit_hook_t Arguments::_exit_hook = NULL;
106 vfprintf_hook_t Arguments::_vfprintf_hook = NULL;
107
108
109 SystemProperty *Arguments::_sun_boot_library_path = NULL;
110 SystemProperty *Arguments::_java_library_path = NULL;
111 SystemProperty *Arguments::_java_home = NULL;
112 SystemProperty *Arguments::_java_class_path = NULL;
113 SystemProperty *Arguments::_jdk_boot_class_path_append = NULL;
114
115 GrowableArray<ModulePatchPath*> *Arguments::_patch_mod_prefix = NULL;
116 PathString *Arguments::_system_boot_class_path = NULL;
117 bool Arguments::_has_jimage = false;
118
119 char* Arguments::_ext_dirs = NULL;
120
121 bool PathString::set_value(const char *value) {
122 if (_value != NULL) {
123 FreeHeap(_value);
124 }
125 _value = AllocateHeap(strlen(value)+1, mtArguments);
126 assert(_value != NULL, "Unable to allocate space for new path value");
127 if (_value != NULL) {
128 strcpy(_value, value);
129 } else {
130 // not able to allocate
131 return false;
132 }
133 return true;
134 }
135
136 void PathString::append_value(const char *value) {
137 char *sp;
138 size_t len = 0;
139 if (value != NULL) {
140 len = strlen(value);
141 if (_value != NULL) {
142 len += strlen(_value);
143 }
144 sp = AllocateHeap(len+2, mtArguments);
145 assert(sp != NULL, "Unable to allocate space for new append path value");
146 if (sp != NULL) {
147 if (_value != NULL) {
148 strcpy(sp, _value);
149 strcat(sp, os::path_separator());
150 strcat(sp, value);
151 FreeHeap(_value);
152 } else {
153 strcpy(sp, value);
154 }
155 _value = sp;
156 }
157 }
158 }
159
160 PathString::PathString(const char* value) {
161 if (value == NULL) {
162 _value = NULL;
163 } else {
164 _value = AllocateHeap(strlen(value)+1, mtArguments);
165 strcpy(_value, value);
166 }
167 }
168
169 PathString::~PathString() {
170 if (_value != NULL) {
171 FreeHeap(_value);
172 _value = NULL;
173 }
174 }
175
176 ModulePatchPath::ModulePatchPath(const char* module_name, const char* path) {
177 assert(module_name != NULL && path != NULL, "Invalid module name or path value");
178 size_t len = strlen(module_name) + 1;
179 _module_name = AllocateHeap(len, mtInternal);
180 strncpy(_module_name, module_name, len); // copy the trailing null
181 _path = new PathString(path);
182 }
183
184 ModulePatchPath::~ModulePatchPath() {
185 if (_module_name != NULL) {
186 FreeHeap(_module_name);
187 _module_name = NULL;
188 }
189 if (_path != NULL) {
190 delete _path;
191 _path = NULL;
192 }
193 }
194
195 SystemProperty::SystemProperty(const char* key, const char* value, bool writeable, bool internal) : PathString(value) {
196 if (key == NULL) {
197 _key = NULL;
198 } else {
199 _key = AllocateHeap(strlen(key)+1, mtArguments);
200 strcpy(_key, key);
201 }
202 _next = NULL;
203 _internal = internal;
204 _writeable = writeable;
205 }
206
207 AgentLibrary::AgentLibrary(const char* name, const char* options,
208 bool is_absolute_path, void* os_lib,
209 bool instrument_lib) {
210 _name = AllocateHeap(strlen(name)+1, mtArguments);
211 strcpy(_name, name);
212 if (options == NULL) {
213 _options = NULL;
214 } else {
215 _options = AllocateHeap(strlen(options)+1, mtArguments);
216 strcpy(_options, options);
217 }
218 _is_absolute_path = is_absolute_path;
219 _os_lib = os_lib;
220 _next = NULL;
221 _state = agent_invalid;
222 _is_static_lib = false;
223 _is_instrument_lib = instrument_lib;
224 }
225
226 // Check if head of 'option' matches 'name', and sets 'tail' to the remaining
227 // part of the option string.
228 static bool match_option(const JavaVMOption *option, const char* name,
229 const char** tail) {
230 size_t len = strlen(name);
231 if (strncmp(option->optionString, name, len) == 0) {
232 *tail = option->optionString + len;
233 return true;
234 } else {
235 return false;
236 }
237 }
238
239 // Check if 'option' matches 'name'. No "tail" is allowed.
240 static bool match_option(const JavaVMOption *option, const char* name) {
241 const char* tail = NULL;
242 bool result = match_option(option, name, &tail);
243 if (tail != NULL && *tail == '\0') {
244 return result;
245 } else {
246 return false;
247 }
248 }
249
250 // Return true if any of the strings in null-terminated array 'names' matches.
251 // If tail_allowed is true, then the tail must begin with a colon; otherwise,
252 // the option must match exactly.
253 static bool match_option(const JavaVMOption* option, const char** names, const char** tail,
254 bool tail_allowed) {
255 for (/* empty */; *names != NULL; ++names) {
256 if (match_option(option, *names, tail)) {
257 if (**tail == '\0' || (tail_allowed && **tail == ':')) {
258 return true;
259 }
260 }
261 }
262 return false;
263 }
264
265 static void logOption(const char* opt) {
266 if (PrintVMOptions) {
267 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt);
268 }
269 }
270
271 bool needs_module_property_warning = false;
272
273 #define MODULE_PROPERTY_PREFIX "jdk.module."
274 #define MODULE_PROPERTY_PREFIX_LEN 11
275 #define ADDEXPORTS "addexports"
276 #define ADDEXPORTS_LEN 10
277 #define ADDREADS "addreads"
278 #define ADDREADS_LEN 8
279 #define ADDOPENS "addopens"
280 #define ADDOPENS_LEN 8
281 #define PATCH "patch"
282 #define PATCH_LEN 5
283 #define ADDMODS "addmods"
284 #define ADDMODS_LEN 7
285 #define LIMITMODS "limitmods"
286 #define LIMITMODS_LEN 9
287 #define PATH "path"
288 #define PATH_LEN 4
289 #define UPGRADE_PATH "upgrade.path"
290 #define UPGRADE_PATH_LEN 12
291
292 void Arguments::add_init_library(const char* name, char* options) {
293 _libraryList.add(new AgentLibrary(name, options, false, NULL));
294 }
295
296 void Arguments::add_init_agent(const char* name, char* options, bool absolute_path) {
297 _agentList.add(new AgentLibrary(name, options, absolute_path, NULL));
298 }
299
300 void Arguments::add_instrument_agent(const char* name, char* options, bool absolute_path) {
301 _agentList.add(new AgentLibrary(name, options, absolute_path, NULL, true));
302 }
303
304 // Late-binding agents not started via arguments
305 void Arguments::add_loaded_agent(AgentLibrary *agentLib) {
306 _agentList.add(agentLib);
307 }
308
309 void Arguments::add_loaded_agent(const char* name, char* options, bool absolute_path, void* os_lib) {
310 _agentList.add(new AgentLibrary(name, options, absolute_path, os_lib));
311 }
312
313 // Return TRUE if option matches 'property', or 'property=', or 'property.'.
314 static bool matches_property_suffix(const char* option, const char* property, size_t len) {
315 return ((strncmp(option, property, len) == 0) &&
316 (option[len] == '=' || option[len] == '.' || option[len] == '\0'));
317 }
318
319 // Return true if property starts with "jdk.module." and its ensuing chars match
320 // any of the reserved module properties.
321 // property should be passed without the leading "-D".
322 bool Arguments::is_internal_module_property(const char* property) {
323 assert((strncmp(property, "-D", 2) != 0), "Unexpected leading -D");
324 if (strncmp(property, MODULE_PROPERTY_PREFIX, MODULE_PROPERTY_PREFIX_LEN) == 0) {
325 const char* property_suffix = property + MODULE_PROPERTY_PREFIX_LEN;
326 if (matches_property_suffix(property_suffix, ADDEXPORTS, ADDEXPORTS_LEN) ||
327 matches_property_suffix(property_suffix, ADDREADS, ADDREADS_LEN) ||
328 matches_property_suffix(property_suffix, ADDOPENS, ADDOPENS_LEN) ||
329 matches_property_suffix(property_suffix, PATCH, PATCH_LEN) ||
330 matches_property_suffix(property_suffix, ADDMODS, ADDMODS_LEN) ||
331 matches_property_suffix(property_suffix, LIMITMODS, LIMITMODS_LEN) ||
332 matches_property_suffix(property_suffix, PATH, PATH_LEN) ||
333 matches_property_suffix(property_suffix, UPGRADE_PATH, UPGRADE_PATH_LEN)) {
334 return true;
335 }
336 }
337 return false;
338 }
339
340 // Process java launcher properties.
341 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) {
342 // See if sun.java.launcher, sun.java.launcher.is_altjvm or
343 // sun.java.launcher.pid is defined.
344 // Must do this before setting up other system properties,
345 // as some of them may depend on launcher type.
346 for (int index = 0; index < args->nOptions; index++) {
347 const JavaVMOption* option = args->options + index;
348 const char* tail;
349
350 if (match_option(option, "-Dsun.java.launcher=", &tail)) {
351 process_java_launcher_argument(tail, option->extraInfo);
352 continue;
353 }
354 if (match_option(option, "-Dsun.java.launcher.is_altjvm=", &tail)) {
355 if (strcmp(tail, "true") == 0) {
356 _sun_java_launcher_is_altjvm = true;
357 }
358 continue;
359 }
360 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) {
361 _sun_java_launcher_pid = atoi(tail);
362 continue;
363 }
364 }
365 }
366
367 // Initialize system properties key and value.
368 void Arguments::init_system_properties() {
369
370 // Set up _system_boot_class_path which is not a property but
371 // relies heavily on argument processing and the jdk.boot.class.path.append
372 // property. It is used to store the underlying system boot class path.
373 _system_boot_class_path = new PathString(NULL);
374
375 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name",
376 "Java Virtual Machine Specification", false));
377 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false));
378 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false));
379 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true));
380 PropertyList_add(&_system_properties, new SystemProperty("jdk.debug", VM_Version::jdk_debug_level(), false));
381
382 // Following are JVMTI agent writable properties.
383 // Properties values are set to NULL and they are
384 // os specific they are initialized in os::init_system_properties_values().
385 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true);
386 _java_library_path = new SystemProperty("java.library.path", NULL, true);
387 _java_home = new SystemProperty("java.home", NULL, true);
388 _java_class_path = new SystemProperty("java.class.path", "", true);
389 // jdk.boot.class.path.append is a non-writeable, internal property.
390 // It can only be set by either:
391 // - -Xbootclasspath/a:
392 // - AddToBootstrapClassLoaderSearch during JVMTI OnLoad phase
393 _jdk_boot_class_path_append = new SystemProperty("jdk.boot.class.path.append", "", false, true);
394
395 // Add to System Property list.
396 PropertyList_add(&_system_properties, _sun_boot_library_path);
397 PropertyList_add(&_system_properties, _java_library_path);
398 PropertyList_add(&_system_properties, _java_home);
399 PropertyList_add(&_system_properties, _java_class_path);
400 PropertyList_add(&_system_properties, _jdk_boot_class_path_append);
401
402 // Set OS specific system properties values
403 os::init_system_properties_values();
404 }
405
406 // Update/Initialize System properties after JDK version number is known
407 void Arguments::init_version_specific_system_properties() {
408 enum { bufsz = 16 };
409 char buffer[bufsz];
410 const char* spec_vendor = "Oracle Corporation";
411 uint32_t spec_version = JDK_Version::current().major_version();
412
413 jio_snprintf(buffer, bufsz, UINT32_FORMAT, spec_version);
414
415 PropertyList_add(&_system_properties,
416 new SystemProperty("java.vm.specification.vendor", spec_vendor, false));
417 PropertyList_add(&_system_properties,
418 new SystemProperty("java.vm.specification.version", buffer, false));
419 PropertyList_add(&_system_properties,
420 new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false));
421 }
422
423 /*
424 * -XX argument processing:
425 *
426 * -XX arguments are defined in several places, such as:
427 * globals.hpp, globals_<cpu>.hpp, globals_<os>.hpp, <compiler>_globals.hpp, or <gc>_globals.hpp.
428 * -XX arguments are parsed in parse_argument().
429 * -XX argument bounds checking is done in check_vm_args_consistency().
430 *
431 * Over time -XX arguments may change. There are mechanisms to handle common cases:
432 *
433 * ALIASED: An option that is simply another name for another option. This is often
434 * part of the process of deprecating a flag, but not all aliases need
435 * to be deprecated.
436 *
437 * Create an alias for an option by adding the old and new option names to the
438 * "aliased_jvm_flags" table. Delete the old variable from globals.hpp (etc).
439 *
440 * DEPRECATED: An option that is supported, but a warning is printed to let the user know that
441 * support may be removed in the future. Both regular and aliased options may be
442 * deprecated.
443 *
444 * Add a deprecation warning for an option (or alias) by adding an entry in the
445 * "special_jvm_flags" table and setting the "deprecated_in" field.
446 * Often an option "deprecated" in one major release will
447 * be made "obsolete" in the next. In this case the entry should also have its
448 * "obsolete_in" field set.
449 *
450 * OBSOLETE: An option that has been removed (and deleted from globals.hpp), but is still accepted
451 * on the command line. A warning is printed to let the user know that option might not
452 * be accepted in the future.
453 *
454 * Add an obsolete warning for an option by adding an entry in the "special_jvm_flags"
455 * table and setting the "obsolete_in" field.
456 *
457 * EXPIRED: A deprecated or obsolete option that has an "accept_until" version less than or equal
458 * to the current JDK version. The system will flatly refuse to admit the existence of
459 * the flag. This allows a flag to die automatically over JDK releases.
460 *
461 * Note that manual cleanup of expired options should be done at major JDK version upgrades:
462 * - Newly expired options should be removed from the special_jvm_flags and aliased_jvm_flags tables.
463 * - Newly obsolete or expired deprecated options should have their global variable
464 * definitions removed (from globals.hpp, etc) and related implementations removed.
465 *
466 * Recommended approach for removing options:
467 *
468 * To remove options commonly used by customers (e.g. product, commercial -XX options), use
469 * the 3-step model adding major release numbers to the deprecate, obsolete and expire columns.
470 *
471 * To remove internal options (e.g. diagnostic, experimental, develop options), use
472 * a 2-step model adding major release numbers to the obsolete and expire columns.
473 *
474 * To change the name of an option, use the alias table as well as a 2-step
475 * model adding major release numbers to the deprecate and expire columns.
476 * Think twice about aliasing commonly used customer options.
477 *
478 * There are times when it is appropriate to leave a future release number as undefined.
479 *
480 * Tests: Aliases should be tested in VMAliasOptions.java.
481 * Deprecated options should be tested in VMDeprecatedOptions.java.
482 */
483
484 // The special_jvm_flags table declares options that are being deprecated and/or obsoleted. The
485 // "deprecated_in" or "obsolete_in" fields may be set to "undefined", but not both.
486 // When the JDK version reaches 'deprecated_in' limit, the JVM will process this flag on
487 // the command-line as usual, but will issue a warning.
488 // When the JDK version reaches 'obsolete_in' limit, the JVM will continue accepting this flag on
489 // the command-line, while issuing a warning and ignoring the flag value.
490 // Once the JDK version reaches 'expired_in' limit, the JVM will flatly refuse to admit the
491 // existence of the flag.
492 //
493 // MANUAL CLEANUP ON JDK VERSION UPDATES:
494 // This table ensures that the handling of options will update automatically when the JDK
495 // version is incremented, but the source code needs to be cleanup up manually:
496 // - As "deprecated" options age into "obsolete" or "expired" options, the associated "globals"
497 // variable should be removed, as well as users of the variable.
498 // - As "deprecated" options age into "obsolete" options, move the entry into the
499 // "Obsolete Flags" section of the table.
500 // - All expired options should be removed from the table.
501 static SpecialFlag const special_jvm_flags[] = {
502 // -------------- Deprecated Flags --------------
503 // --- Non-alias flags - sorted by obsolete_in then expired_in:
504 { "MaxGCMinorPauseMillis", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() },
505 { "UseConcMarkSweepGC", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
506 { "AssumeMP", JDK_Version::jdk(10),JDK_Version::undefined(), JDK_Version::undefined() },
507 { "MonitorInUseLists", JDK_Version::jdk(10),JDK_Version::undefined(), JDK_Version::undefined() },
508 { "MaxRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
509 { "MinRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
510 { "InitialRAMFraction", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
511 { "UseMembar", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
512 { "FastTLABRefill", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
513 { "SafepointSpinBeforeYield", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
514 { "DeferThrSuspendLoopCount", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
515 { "DeferPollingPageLoopCount", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
516 { "IgnoreUnverifiableClassesDuringDump", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
517 { "CheckEndorsedAndExtDirs", JDK_Version::jdk(10), JDK_Version::undefined(), JDK_Version::undefined() },
518 { "CompilerThreadHintNoPreempt", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
519 { "VMThreadHintNoPreempt", JDK_Version::jdk(11), JDK_Version::jdk(12), JDK_Version::jdk(13) },
520
521 // --- Deprecated alias flags (see also aliased_jvm_flags) - sorted by obsolete_in then expired_in:
522 { "DefaultMaxRAMFraction", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() },
523 { "CreateMinidumpOnCrash", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
524 { "MustCallLoadClassInternal", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
525 { "UnsyncloadClass", JDK_Version::jdk(10), JDK_Version::jdk(11), JDK_Version::jdk(12) },
526
527 // -------------- Obsolete Flags - sorted by expired_in --------------
528 { "ConvertSleepToYield", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) },
529 { "ConvertYieldToSleep", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) },
530 { "MinSleepInterval", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) },
531 { "CheckAssertionStatusDirectives",JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
532 { "PrintMallocFree", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
533 { "PrintMalloc", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
534 { "PermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::undefined() },
535 { "MaxPermSize", JDK_Version::undefined(), JDK_Version::jdk(8), JDK_Version::undefined() },
536 { "SharedReadWriteSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() },
537 { "SharedReadOnlySize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() },
538 { "SharedMiscDataSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() },
539 { "SharedMiscCodeSize", JDK_Version::undefined(), JDK_Version::jdk(10), JDK_Version::undefined() },
540 { "UseUTCFileTimestamp", JDK_Version::undefined(), JDK_Version::jdk(11), JDK_Version::jdk(12) },
541
542 #ifdef TEST_VERIFY_SPECIAL_JVM_FLAGS
543 { "dep > obs", JDK_Version::jdk(9), JDK_Version::jdk(8), JDK_Version::undefined() },
544 { "dep > exp ", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(8) },
545 { "obs > exp ", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(8) },
546 { "not deprecated or obsolete", JDK_Version::undefined(), JDK_Version::undefined(), JDK_Version::jdk(9) },
547 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
548 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
549 { "BytecodeVerificationRemote", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::undefined() },
550 #endif
551
552 { NULL, JDK_Version(0), JDK_Version(0) }
553 };
554
555 // Flags that are aliases for other flags.
556 typedef struct {
557 const char* alias_name;
558 const char* real_name;
559 } AliasedFlag;
560
561 static AliasedFlag const aliased_jvm_flags[] = {
562 { "DefaultMaxRAMFraction", "MaxRAMFraction" },
563 { "CreateMinidumpOnCrash", "CreateCoredumpOnCrash" },
564 { NULL, NULL}
565 };
566
567 // NOTE: A compatibility request will be necessary for each alias to be removed.
568 static AliasedLoggingFlag const aliased_logging_flags[] = {
569 { "PrintCompressedOopsMode", LogLevel::Info, true, LOG_TAGS(gc, heap, coops) },
570 { "PrintSharedSpaces", LogLevel::Info, true, LOG_TAGS(cds) },
571 { "TraceBiasedLocking", LogLevel::Info, true, LOG_TAGS(biasedlocking) },
572 { "TraceClassLoading", LogLevel::Info, true, LOG_TAGS(class, load) },
573 { "TraceClassLoadingPreorder", LogLevel::Debug, true, LOG_TAGS(class, preorder) },
574 { "TraceClassPaths", LogLevel::Info, true, LOG_TAGS(class, path) },
575 { "TraceClassResolution", LogLevel::Debug, true, LOG_TAGS(class, resolve) },
576 { "TraceClassUnloading", LogLevel::Info, true, LOG_TAGS(class, unload) },
577 { "TraceExceptions", LogLevel::Info, true, LOG_TAGS(exceptions) },
578 { "TraceLoaderConstraints", LogLevel::Info, true, LOG_TAGS(class, loader, constraints) },
579 { "TraceMonitorInflation", LogLevel::Debug, true, LOG_TAGS(monitorinflation) },
580 { "TraceSafepointCleanupTime", LogLevel::Info, true, LOG_TAGS(safepoint, cleanup) },
581 { "TraceJVMTIObjectTagging", LogLevel::Debug, true, LOG_TAGS(jvmti, objecttagging) },
582 { "TraceRedefineClasses", LogLevel::Info, false, LOG_TAGS(redefine, class) },
583 { NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG) }
584 };
585
586 #ifndef PRODUCT
587 // These options are removed in jdk9. Remove this code for jdk10.
588 static AliasedFlag const removed_develop_logging_flags[] = {
589 { "TraceClassInitialization", "-Xlog:class+init" },
590 { "TraceClassLoaderData", "-Xlog:class+loader+data" },
591 { "TraceDefaultMethods", "-Xlog:defaultmethods=debug" },
592 { "TraceItables", "-Xlog:itables=debug" },
593 { "TraceMonitorMismatch", "-Xlog:monitormismatch=info" },
594 { "TraceSafepoint", "-Xlog:safepoint=debug" },
595 { "TraceStartupTime", "-Xlog:startuptime" },
596 { "TraceVMOperation", "-Xlog:vmoperation=debug" },
597 { "PrintVtables", "-Xlog:vtables=debug" },
598 { "VerboseVerification", "-Xlog:verification" },
599 { NULL, NULL }
600 };
601 #endif //PRODUCT
602
603 // Return true if "v" is less than "other", where "other" may be "undefined".
604 static bool version_less_than(JDK_Version v, JDK_Version other) {
605 assert(!v.is_undefined(), "must be defined");
606 if (!other.is_undefined() && v.compare(other) >= 0) {
607 return false;
608 } else {
609 return true;
610 }
611 }
612
613 extern bool lookup_special_flag_ext(const char *flag_name, SpecialFlag& flag);
614
615 static bool lookup_special_flag(const char *flag_name, SpecialFlag& flag) {
616 // Allow extensions to have priority
617 if (lookup_special_flag_ext(flag_name, flag)) {
618 return true;
619 }
620
621 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
622 if ((strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
623 flag = special_jvm_flags[i];
624 return true;
625 }
626 }
627 return false;
628 }
629
630 bool Arguments::is_obsolete_flag(const char *flag_name, JDK_Version* version) {
631 assert(version != NULL, "Must provide a version buffer");
632 SpecialFlag flag;
633 if (lookup_special_flag(flag_name, flag)) {
634 if (!flag.obsolete_in.is_undefined()) {
635 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) {
636 *version = flag.obsolete_in;
637 return true;
638 }
639 }
640 }
641 return false;
642 }
643
644 int Arguments::is_deprecated_flag(const char *flag_name, JDK_Version* version) {
645 assert(version != NULL, "Must provide a version buffer");
646 SpecialFlag flag;
647 if (lookup_special_flag(flag_name, flag)) {
648 if (!flag.deprecated_in.is_undefined()) {
649 if (version_less_than(JDK_Version::current(), flag.obsolete_in) &&
650 version_less_than(JDK_Version::current(), flag.expired_in)) {
651 *version = flag.deprecated_in;
652 return 1;
653 } else {
654 return -1;
655 }
656 }
657 }
658 return 0;
659 }
660
661 #ifndef PRODUCT
662 const char* Arguments::removed_develop_logging_flag_name(const char* name){
663 for (size_t i = 0; removed_develop_logging_flags[i].alias_name != NULL; i++) {
664 const AliasedFlag& flag = removed_develop_logging_flags[i];
665 if (strcmp(flag.alias_name, name) == 0) {
666 return flag.real_name;
667 }
668 }
669 return NULL;
670 }
671 #endif // PRODUCT
672
673 const char* Arguments::real_flag_name(const char *flag_name) {
674 for (size_t i = 0; aliased_jvm_flags[i].alias_name != NULL; i++) {
675 const AliasedFlag& flag_status = aliased_jvm_flags[i];
676 if (strcmp(flag_status.alias_name, flag_name) == 0) {
677 return flag_status.real_name;
678 }
679 }
680 return flag_name;
681 }
682
683 #ifdef ASSERT
684 static bool lookup_special_flag(const char *flag_name, size_t skip_index) {
685 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
686 if ((i != skip_index) && (strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
687 return true;
688 }
689 }
690 return false;
691 }
692
693 // Verifies the correctness of the entries in the special_jvm_flags table.
694 // If there is a semantic error (i.e. a bug in the table) such as the obsoletion
695 // version being earlier than the deprecation version, then a warning is issued
696 // and verification fails - by returning false. If it is detected that the table
697 // is out of date, with respect to the current version, then a warning is issued
698 // but verification does not fail. This allows the VM to operate when the version
699 // is first updated, without needing to update all the impacted flags at the
700 // same time.
701 static bool verify_special_jvm_flags() {
702 bool success = true;
703 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
704 const SpecialFlag& flag = special_jvm_flags[i];
705 if (lookup_special_flag(flag.name, i)) {
706 warning("Duplicate special flag declaration \"%s\"", flag.name);
707 success = false;
708 }
709 if (flag.deprecated_in.is_undefined() &&
710 flag.obsolete_in.is_undefined()) {
711 warning("Special flag entry \"%s\" must declare version deprecated and/or obsoleted in.", flag.name);
712 success = false;
713 }
714
715 if (!flag.deprecated_in.is_undefined()) {
716 if (!version_less_than(flag.deprecated_in, flag.obsolete_in)) {
717 warning("Special flag entry \"%s\" must be deprecated before obsoleted.", flag.name);
718 success = false;
719 }
720
721 if (!version_less_than(flag.deprecated_in, flag.expired_in)) {
722 warning("Special flag entry \"%s\" must be deprecated before expired.", flag.name);
723 success = false;
724 }
725 }
726
727 if (!flag.obsolete_in.is_undefined()) {
728 if (!version_less_than(flag.obsolete_in, flag.expired_in)) {
729 warning("Special flag entry \"%s\" must be obsoleted before expired.", flag.name);
730 success = false;
731 }
732
733 // if flag has become obsolete it should not have a "globals" flag defined anymore.
734 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) {
735 if (Flag::find_flag(flag.name) != NULL) {
736 // Temporarily disable the warning: 8196739
737 // warning("Global variable for obsolete special flag entry \"%s\" should be removed", flag.name);
738 }
739 }
740 }
741
742 if (!flag.expired_in.is_undefined()) {
743 // if flag has become expired it should not have a "globals" flag defined anymore.
744 if (!version_less_than(JDK_Version::current(), flag.expired_in)) {
745 if (Flag::find_flag(flag.name) != NULL) {
746 // Temporarily disable the warning: 8196739
747 // warning("Global variable for expired flag entry \"%s\" should be removed", flag.name);
748 }
749 }
750 }
751
752 }
753 return success;
754 }
755 #endif
756
757 // Parses a size specification string.
758 bool Arguments::atojulong(const char *s, julong* result) {
759 julong n = 0;
760
761 // First char must be a digit. Don't allow negative numbers or leading spaces.
762 if (!isdigit(*s)) {
763 return false;
764 }
765
766 bool is_hex = (s[0] == '0' && (s[1] == 'x' || s[1] == 'X'));
767 char* remainder;
768 errno = 0;
769 n = strtoull(s, &remainder, (is_hex ? 16 : 10));
770 if (errno != 0) {
771 return false;
772 }
773
774 // Fail if no number was read at all or if the remainder contains more than a single non-digit character.
775 if (remainder == s || strlen(remainder) > 1) {
776 return false;
777 }
778
779 switch (*remainder) {
780 case 'T': case 't':
781 *result = n * G * K;
782 // Check for overflow.
783 if (*result/((julong)G * K) != n) return false;
784 return true;
785 case 'G': case 'g':
786 *result = n * G;
787 if (*result/G != n) return false;
788 return true;
789 case 'M': case 'm':
790 *result = n * M;
791 if (*result/M != n) return false;
792 return true;
793 case 'K': case 'k':
794 *result = n * K;
795 if (*result/K != n) return false;
796 return true;
797 case '\0':
798 *result = n;
799 return true;
800 default:
801 return false;
802 }
803 }
804
805 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size, julong max_size) {
806 if (size < min_size) return arg_too_small;
807 if (size > max_size) return arg_too_big;
808 return arg_in_range;
809 }
810
811 // Describe an argument out of range error
812 void Arguments::describe_range_error(ArgsRange errcode) {
813 switch(errcode) {
814 case arg_too_big:
815 jio_fprintf(defaultStream::error_stream(),
816 "The specified size exceeds the maximum "
817 "representable size.\n");
818 break;
819 case arg_too_small:
820 case arg_unreadable:
821 case arg_in_range:
822 // do nothing for now
823 break;
824 default:
825 ShouldNotReachHere();
826 }
827 }
828
829 static bool set_bool_flag(const char* name, bool value, Flag::Flags origin) {
830 if (CommandLineFlags::boolAtPut(name, &value, origin) == Flag::SUCCESS) {
831 return true;
832 } else {
833 return false;
834 }
835 }
836
837 static bool set_fp_numeric_flag(const char* name, char* value, Flag::Flags origin) {
838 char* end;
839 errno = 0;
840 double v = strtod(value, &end);
841 if ((errno != 0) || (*end != 0)) {
842 return false;
843 }
844
845 if (CommandLineFlags::doubleAtPut(name, &v, origin) == Flag::SUCCESS) {
846 return true;
847 }
848 return false;
849 }
850
851 static bool set_numeric_flag(const char* name, char* value, Flag::Flags origin) {
852 julong v;
853 int int_v;
854 intx intx_v;
855 bool is_neg = false;
856 Flag* result = Flag::find_flag(name, strlen(name));
857
858 if (result == NULL) {
859 return false;
860 }
861
862 // Check the sign first since atojulong() parses only unsigned values.
863 if (*value == '-') {
864 if (!result->is_intx() && !result->is_int()) {
865 return false;
866 }
867 value++;
868 is_neg = true;
869 }
870 if (!Arguments::atojulong(value, &v)) {
871 return false;
872 }
873 if (result->is_int()) {
874 int_v = (int) v;
875 if (is_neg) {
876 int_v = -int_v;
877 }
878 return CommandLineFlags::intAtPut(result, &int_v, origin) == Flag::SUCCESS;
879 } else if (result->is_uint()) {
880 uint uint_v = (uint) v;
881 return CommandLineFlags::uintAtPut(result, &uint_v, origin) == Flag::SUCCESS;
882 } else if (result->is_intx()) {
883 intx_v = (intx) v;
884 if (is_neg) {
885 intx_v = -intx_v;
886 }
887 return CommandLineFlags::intxAtPut(result, &intx_v, origin) == Flag::SUCCESS;
888 } else if (result->is_uintx()) {
889 uintx uintx_v = (uintx) v;
890 return CommandLineFlags::uintxAtPut(result, &uintx_v, origin) == Flag::SUCCESS;
891 } else if (result->is_uint64_t()) {
892 uint64_t uint64_t_v = (uint64_t) v;
893 return CommandLineFlags::uint64_tAtPut(result, &uint64_t_v, origin) == Flag::SUCCESS;
894 } else if (result->is_size_t()) {
895 size_t size_t_v = (size_t) v;
896 return CommandLineFlags::size_tAtPut(result, &size_t_v, origin) == Flag::SUCCESS;
897 } else if (result->is_double()) {
898 double double_v = (double) v;
899 return CommandLineFlags::doubleAtPut(result, &double_v, origin) == Flag::SUCCESS;
900 } else {
901 return false;
902 }
903 }
904
905 static bool set_string_flag(const char* name, const char* value, Flag::Flags origin) {
906 if (CommandLineFlags::ccstrAtPut(name, &value, origin) != Flag::SUCCESS) return false;
907 // Contract: CommandLineFlags always returns a pointer that needs freeing.
908 FREE_C_HEAP_ARRAY(char, value);
909 return true;
910 }
911
912 static bool append_to_string_flag(const char* name, const char* new_value, Flag::Flags origin) {
913 const char* old_value = "";
914 if (CommandLineFlags::ccstrAt(name, &old_value) != Flag::SUCCESS) return false;
915 size_t old_len = old_value != NULL ? strlen(old_value) : 0;
916 size_t new_len = strlen(new_value);
917 const char* value;
918 char* free_this_too = NULL;
919 if (old_len == 0) {
920 value = new_value;
921 } else if (new_len == 0) {
922 value = old_value;
923 } else {
924 size_t length = old_len + 1 + new_len + 1;
925 char* buf = NEW_C_HEAP_ARRAY(char, length, mtArguments);
926 // each new setting adds another LINE to the switch:
927 jio_snprintf(buf, length, "%s\n%s", old_value, new_value);
928 value = buf;
929 free_this_too = buf;
930 }
931 (void) CommandLineFlags::ccstrAtPut(name, &value, origin);
932 // CommandLineFlags always returns a pointer that needs freeing.
933 FREE_C_HEAP_ARRAY(char, value);
934 if (free_this_too != NULL) {
935 // CommandLineFlags made its own copy, so I must delete my own temp. buffer.
936 FREE_C_HEAP_ARRAY(char, free_this_too);
937 }
938 return true;
939 }
940
941 const char* Arguments::handle_aliases_and_deprecation(const char* arg, bool warn) {
942 const char* real_name = real_flag_name(arg);
943 JDK_Version since = JDK_Version();
944 switch (is_deprecated_flag(arg, &since)) {
945 case -1:
946 return NULL; // obsolete or expired, don't process normally
947 case 0:
948 return real_name;
949 case 1: {
950 if (warn) {
951 char version[256];
952 since.to_string(version, sizeof(version));
953 if (real_name != arg) {
954 warning("Option %s was deprecated in version %s and will likely be removed in a future release. Use option %s instead.",
955 arg, version, real_name);
956 } else {
957 warning("Option %s was deprecated in version %s and will likely be removed in a future release.",
958 arg, version);
959 }
960 }
961 return real_name;
962 }
963 }
964 ShouldNotReachHere();
965 return NULL;
966 }
967
968 void log_deprecated_flag(const char* name, bool on, AliasedLoggingFlag alf) {
969 LogTagType tagSet[] = {alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5};
970 // Set tagset string buffer at max size of 256, large enough for any alias tagset
971 const int max_tagset_size = 256;
972 int max_tagset_len = max_tagset_size - 1;
973 char tagset_buffer[max_tagset_size];
974 tagset_buffer[0] = '\0';
975
976 // Write tag-set for aliased logging option, in string list form
977 int max_tags = sizeof(tagSet)/sizeof(tagSet[0]);
978 for (int i = 0; i < max_tags && tagSet[i] != LogTag::__NO_TAG; i++) {
979 if (i > 0) {
980 strncat(tagset_buffer, "+", max_tagset_len - strlen(tagset_buffer));
981 }
982 strncat(tagset_buffer, LogTag::name(tagSet[i]), max_tagset_len - strlen(tagset_buffer));
983 }
984 if (!alf.exactMatch) {
985 strncat(tagset_buffer, "*", max_tagset_len - strlen(tagset_buffer));
986 }
987 log_warning(arguments)("-XX:%s%s is deprecated. Will use -Xlog:%s=%s instead.",
988 (on) ? "+" : "-",
989 name,
990 tagset_buffer,
991 (on) ? LogLevel::name(alf.level) : "off");
992 }
993
994 AliasedLoggingFlag Arguments::catch_logging_aliases(const char* name, bool on){
995 for (size_t i = 0; aliased_logging_flags[i].alias_name != NULL; i++) {
996 const AliasedLoggingFlag& alf = aliased_logging_flags[i];
997 if (strcmp(alf.alias_name, name) == 0) {
998 log_deprecated_flag(name, on, alf);
999 return alf;
1000 }
1001 }
1002 AliasedLoggingFlag a = {NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG)};
1003 return a;
1004 }
1005
1006 bool Arguments::parse_argument(const char* arg, Flag::Flags origin) {
1007
1008 // range of acceptable characters spelled out for portability reasons
1009 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]"
1010 #define BUFLEN 255
1011 char name[BUFLEN+1];
1012 char dummy;
1013 const char* real_name;
1014 bool warn_if_deprecated = true;
1015
1016 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
1017 AliasedLoggingFlag alf = catch_logging_aliases(name, false);
1018 if (alf.alias_name != NULL){
1019 LogConfiguration::configure_stdout(LogLevel::Off, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
1020 return true;
1021 }
1022 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1023 if (real_name == NULL) {
1024 return false;
1025 }
1026 return set_bool_flag(real_name, false, origin);
1027 }
1028 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
1029 AliasedLoggingFlag alf = catch_logging_aliases(name, true);
1030 if (alf.alias_name != NULL){
1031 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
1032 return true;
1033 }
1034 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1035 if (real_name == NULL) {
1036 return false;
1037 }
1038 return set_bool_flag(real_name, true, origin);
1039 }
1040
1041 char punct;
1042 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') {
1043 const char* value = strchr(arg, '=') + 1;
1044 Flag* flag;
1045
1046 // this scanf pattern matches both strings (handled here) and numbers (handled later))
1047 AliasedLoggingFlag alf = catch_logging_aliases(name, true);
1048 if (alf.alias_name != NULL) {
1049 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
1050 return true;
1051 }
1052 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1053 if (real_name == NULL) {
1054 return false;
1055 }
1056 flag = Flag::find_flag(real_name);
1057 if (flag != NULL && flag->is_ccstr()) {
1058 if (flag->ccstr_accumulates()) {
1059 return append_to_string_flag(real_name, value, origin);
1060 } else {
1061 if (value[0] == '\0') {
1062 value = NULL;
1063 }
1064 return set_string_flag(real_name, value, origin);
1065 }
1066 } else {
1067 warn_if_deprecated = false; // if arg is deprecated, we've already done warning...
1068 }
1069 }
1070
1071 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') {
1072 const char* value = strchr(arg, '=') + 1;
1073 // -XX:Foo:=xxx will reset the string flag to the given value.
1074 if (value[0] == '\0') {
1075 value = NULL;
1076 }
1077 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1078 if (real_name == NULL) {
1079 return false;
1080 }
1081 return set_string_flag(real_name, value, origin);
1082 }
1083
1084 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.eE+]"
1085 #define SIGNED_NUMBER_RANGE "[-0123456789]"
1086 #define NUMBER_RANGE "[0123456789eE+-]"
1087 char value[BUFLEN + 1];
1088 char value2[BUFLEN + 1];
1089 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) {
1090 // Looks like a floating-point number -- try again with more lenient format string
1091 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) {
1092 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1093 if (real_name == NULL) {
1094 return false;
1095 }
1096 return set_fp_numeric_flag(real_name, value, origin);
1097 }
1098 }
1099
1100 #define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]"
1101 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) {
1102 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1103 if (real_name == NULL) {
1104 return false;
1105 }
1106 return set_numeric_flag(real_name, value, origin);
1107 }
1108
1109 return false;
1110 }
1111
1112 void Arguments::add_string(char*** bldarray, int* count, const char* arg) {
1113 assert(bldarray != NULL, "illegal argument");
1114
1115 if (arg == NULL) {
1116 return;
1117 }
1118
1119 int new_count = *count + 1;
1120
1121 // expand the array and add arg to the last element
1122 if (*bldarray == NULL) {
1123 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtArguments);
1124 } else {
1125 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtArguments);
1126 }
1127 (*bldarray)[*count] = os::strdup_check_oom(arg);
1128 *count = new_count;
1129 }
1130
1131 void Arguments::build_jvm_args(const char* arg) {
1132 add_string(&_jvm_args_array, &_num_jvm_args, arg);
1133 }
1134
1135 void Arguments::build_jvm_flags(const char* arg) {
1136 add_string(&_jvm_flags_array, &_num_jvm_flags, arg);
1137 }
1138
1139 // utility function to return a string that concatenates all
1140 // strings in a given char** array
1141 const char* Arguments::build_resource_string(char** args, int count) {
1142 if (args == NULL || count == 0) {
1143 return NULL;
1144 }
1145 size_t length = 0;
1146 for (int i = 0; i < count; i++) {
1147 length += strlen(args[i]) + 1; // add 1 for a space or NULL terminating character
1148 }
1149 char* s = NEW_RESOURCE_ARRAY(char, length);
1150 char* dst = s;
1151 for (int j = 0; j < count; j++) {
1152 size_t offset = strlen(args[j]) + 1; // add 1 for a space or NULL terminating character
1153 jio_snprintf(dst, length, "%s ", args[j]); // jio_snprintf will replace the last space character with NULL character
1154 dst += offset;
1155 length -= offset;
1156 }
1157 return (const char*) s;
1158 }
1159
1160 void Arguments::print_on(outputStream* st) {
1161 st->print_cr("VM Arguments:");
1162 if (num_jvm_flags() > 0) {
1163 st->print("jvm_flags: "); print_jvm_flags_on(st);
1164 st->cr();
1165 }
1166 if (num_jvm_args() > 0) {
1167 st->print("jvm_args: "); print_jvm_args_on(st);
1168 st->cr();
1169 }
1170 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>");
1171 if (_java_class_path != NULL) {
1172 char* path = _java_class_path->value();
1173 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path );
1174 }
1175 st->print_cr("Launcher Type: %s", _sun_java_launcher);
1176 }
1177
1178 void Arguments::print_summary_on(outputStream* st) {
1179 // Print the command line. Environment variables that are helpful for
1180 // reproducing the problem are written later in the hs_err file.
1181 // flags are from setting file
1182 if (num_jvm_flags() > 0) {
1183 st->print_raw("Settings File: ");
1184 print_jvm_flags_on(st);
1185 st->cr();
1186 }
1187 // args are the command line and environment variable arguments.
1188 st->print_raw("Command Line: ");
1189 if (num_jvm_args() > 0) {
1190 print_jvm_args_on(st);
1191 }
1192 // this is the classfile and any arguments to the java program
1193 if (java_command() != NULL) {
1194 st->print("%s", java_command());
1195 }
1196 st->cr();
1197 }
1198
1199 void Arguments::print_jvm_flags_on(outputStream* st) {
1200 if (_num_jvm_flags > 0) {
1201 for (int i=0; i < _num_jvm_flags; i++) {
1202 st->print("%s ", _jvm_flags_array[i]);
1203 }
1204 }
1205 }
1206
1207 void Arguments::print_jvm_args_on(outputStream* st) {
1208 if (_num_jvm_args > 0) {
1209 for (int i=0; i < _num_jvm_args; i++) {
1210 st->print("%s ", _jvm_args_array[i]);
1211 }
1212 }
1213 }
1214
1215 bool Arguments::process_argument(const char* arg,
1216 jboolean ignore_unrecognized,
1217 Flag::Flags origin) {
1218 JDK_Version since = JDK_Version();
1219
1220 if (parse_argument(arg, origin)) {
1221 return true;
1222 }
1223
1224 // Determine if the flag has '+', '-', or '=' characters.
1225 bool has_plus_minus = (*arg == '+' || *arg == '-');
1226 const char* const argname = has_plus_minus ? arg + 1 : arg;
1227
1228 size_t arg_len;
1229 const char* equal_sign = strchr(argname, '=');
1230 if (equal_sign == NULL) {
1231 arg_len = strlen(argname);
1232 } else {
1233 arg_len = equal_sign - argname;
1234 }
1235
1236 // Only make the obsolete check for valid arguments.
1237 if (arg_len <= BUFLEN) {
1238 // Construct a string which consists only of the argument name without '+', '-', or '='.
1239 char stripped_argname[BUFLEN+1]; // +1 for '\0'
1240 jio_snprintf(stripped_argname, arg_len+1, "%s", argname); // +1 for '\0'
1241 if (is_obsolete_flag(stripped_argname, &since)) {
1242 char version[256];
1243 since.to_string(version, sizeof(version));
1244 warning("Ignoring option %s; support was removed in %s", stripped_argname, version);
1245 return true;
1246 }
1247 #ifndef PRODUCT
1248 else {
1249 const char* replacement;
1250 if ((replacement = removed_develop_logging_flag_name(stripped_argname)) != NULL){
1251 log_warning(arguments)("%s has been removed. Please use %s instead.",
1252 stripped_argname,
1253 replacement);
1254 return false;
1255 }
1256 }
1257 #endif //PRODUCT
1258 }
1259
1260 // For locked flags, report a custom error message if available.
1261 // Otherwise, report the standard unrecognized VM option.
1262 Flag* found_flag = Flag::find_flag((const char*)argname, arg_len, true, true);
1263 if (found_flag != NULL) {
1264 char locked_message_buf[BUFLEN];
1265 Flag::MsgType msg_type = found_flag->get_locked_message(locked_message_buf, BUFLEN);
1266 if (strlen(locked_message_buf) == 0) {
1267 if (found_flag->is_bool() && !has_plus_minus) {
1268 jio_fprintf(defaultStream::error_stream(),
1269 "Missing +/- setting for VM option '%s'\n", argname);
1270 } else if (!found_flag->is_bool() && has_plus_minus) {
1271 jio_fprintf(defaultStream::error_stream(),
1272 "Unexpected +/- setting in VM option '%s'\n", argname);
1273 } else {
1274 jio_fprintf(defaultStream::error_stream(),
1275 "Improperly specified VM option '%s'\n", argname);
1276 }
1277 } else {
1278 #ifdef PRODUCT
1279 bool mismatched = ((msg_type == Flag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD) ||
1280 (msg_type == Flag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD));
1281 if (ignore_unrecognized && mismatched) {
1282 return true;
1283 }
1284 #endif
1285 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf);
1286 }
1287 } else {
1288 if (ignore_unrecognized) {
1289 return true;
1290 }
1291 jio_fprintf(defaultStream::error_stream(),
1292 "Unrecognized VM option '%s'\n", argname);
1293 Flag* fuzzy_matched = Flag::fuzzy_match((const char*)argname, arg_len, true);
1294 if (fuzzy_matched != NULL) {
1295 jio_fprintf(defaultStream::error_stream(),
1296 "Did you mean '%s%s%s'? ",
1297 (fuzzy_matched->is_bool()) ? "(+/-)" : "",
1298 fuzzy_matched->_name,
1299 (fuzzy_matched->is_bool()) ? "" : "=<value>");
1300 }
1301 }
1302
1303 // allow for commandline "commenting out" options like -XX:#+Verbose
1304 return arg[0] == '#';
1305 }
1306
1307 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) {
1308 FILE* stream = fopen(file_name, "rb");
1309 if (stream == NULL) {
1310 if (should_exist) {
1311 jio_fprintf(defaultStream::error_stream(),
1312 "Could not open settings file %s\n", file_name);
1313 return false;
1314 } else {
1315 return true;
1316 }
1317 }
1318
1319 char token[1024];
1320 int pos = 0;
1321
1322 bool in_white_space = true;
1323 bool in_comment = false;
1324 bool in_quote = false;
1325 char quote_c = 0;
1326 bool result = true;
1327
1328 int c = getc(stream);
1329 while(c != EOF && pos < (int)(sizeof(token)-1)) {
1330 if (in_white_space) {
1331 if (in_comment) {
1332 if (c == '\n') in_comment = false;
1333 } else {
1334 if (c == '#') in_comment = true;
1335 else if (!isspace(c)) {
1336 in_white_space = false;
1337 token[pos++] = c;
1338 }
1339 }
1340 } else {
1341 if (c == '\n' || (!in_quote && isspace(c))) {
1342 // token ends at newline, or at unquoted whitespace
1343 // this allows a way to include spaces in string-valued options
1344 token[pos] = '\0';
1345 logOption(token);
1346 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
1347 build_jvm_flags(token);
1348 pos = 0;
1349 in_white_space = true;
1350 in_quote = false;
1351 } else if (!in_quote && (c == '\'' || c == '"')) {
1352 in_quote = true;
1353 quote_c = c;
1354 } else if (in_quote && (c == quote_c)) {
1355 in_quote = false;
1356 } else {
1357 token[pos++] = c;
1358 }
1359 }
1360 c = getc(stream);
1361 }
1362 if (pos > 0) {
1363 token[pos] = '\0';
1364 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
1365 build_jvm_flags(token);
1366 }
1367 fclose(stream);
1368 return result;
1369 }
1370
1371 //=============================================================================================================
1372 // Parsing of properties (-D)
1373
1374 const char* Arguments::get_property(const char* key) {
1375 return PropertyList_get_value(system_properties(), key);
1376 }
1377
1378 bool Arguments::add_property(const char* prop, PropertyWriteable writeable, PropertyInternal internal) {
1379 const char* eq = strchr(prop, '=');
1380 const char* key;
1381 const char* value = "";
1382
1383 if (eq == NULL) {
1384 // property doesn't have a value, thus use passed string
1385 key = prop;
1386 } else {
1387 // property have a value, thus extract it and save to the
1388 // allocated string
1389 size_t key_len = eq - prop;
1390 char* tmp_key = AllocateHeap(key_len + 1, mtArguments);
1391
1392 jio_snprintf(tmp_key, key_len + 1, "%s", prop);
1393 key = tmp_key;
1394
1395 value = &prop[key_len + 1];
1396 }
1397
1398 if (strcmp(key, "java.compiler") == 0) {
1399 process_java_compiler_argument(value);
1400 // Record value in Arguments, but let it get passed to Java.
1401 } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 ||
1402 strcmp(key, "sun.java.launcher.pid") == 0) {
1403 // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are
1404 // private and are processed in process_sun_java_launcher_properties();
1405 // the sun.java.launcher property is passed on to the java application
1406 } else if (strcmp(key, "sun.boot.library.path") == 0) {
1407 // append is true, writable is true, internal is false
1408 PropertyList_unique_add(&_system_properties, key, value, AppendProperty,
1409 WriteableProperty, ExternalProperty);
1410 } else {
1411 if (strcmp(key, "sun.java.command") == 0) {
1412 char *old_java_command = _java_command;
1413 _java_command = os::strdup_check_oom(value, mtArguments);
1414 if (old_java_command != NULL) {
1415 os::free(old_java_command);
1416 }
1417 } else if (strcmp(key, "java.vendor.url.bug") == 0) {
1418 const char* old_java_vendor_url_bug = _java_vendor_url_bug;
1419 // save it in _java_vendor_url_bug, so JVM fatal error handler can access
1420 // its value without going through the property list or making a Java call.
1421 _java_vendor_url_bug = os::strdup_check_oom(value, mtArguments);
1422 if (old_java_vendor_url_bug != DEFAULT_VENDOR_URL_BUG) {
1423 assert(old_java_vendor_url_bug != NULL, "_java_vendor_url_bug is NULL");
1424 os::free((void *)old_java_vendor_url_bug);
1425 }
1426 }
1427
1428 // Create new property and add at the end of the list
1429 PropertyList_unique_add(&_system_properties, key, value, AddProperty, writeable, internal);
1430 }
1431
1432 if (key != prop) {
1433 // SystemProperty copy passed value, thus free previously allocated
1434 // memory
1435 FreeHeap((void *)key);
1436 }
1437
1438 return true;
1439 }
1440
1441 #if INCLUDE_CDS
1442 void Arguments::check_unsupported_dumping_properties() {
1443 assert(DumpSharedSpaces, "this function is only used with -Xshare:dump");
1444 const char* unsupported_properties[] = { "jdk.module.main",
1445 "jdk.module.limitmods",
1446 "jdk.module.path",
1447 "jdk.module.upgrade.path",
1448 "jdk.module.patch.0" };
1449 const char* unsupported_options[] = { "-m", // cannot use at dump time
1450 "--limit-modules", // ignored at dump time
1451 "--module-path", // ignored at dump time
1452 "--upgrade-module-path", // ignored at dump time
1453 "--patch-module" // ignored at dump time
1454 };
1455 assert(ARRAY_SIZE(unsupported_properties) == ARRAY_SIZE(unsupported_options), "must be");
1456 // If a vm option is found in the unsupported_options array with index less than the info_idx,
1457 // vm will exit with an error message. Otherwise, it will print an informational message if
1458 // -Xlog:cds is enabled.
1459 uint info_idx = 1;
1460 SystemProperty* sp = system_properties();
1461 while (sp != NULL) {
1462 for (uint i = 0; i < ARRAY_SIZE(unsupported_properties); i++) {
1463 if (strcmp(sp->key(), unsupported_properties[i]) == 0) {
1464 if (i < info_idx) {
1465 vm_exit_during_initialization(
1466 "Cannot use the following option when dumping the shared archive", unsupported_options[i]);
1467 } else {
1468 log_info(cds)("Info: the %s option is ignored when dumping the shared archive",
1469 unsupported_options[i]);
1470 }
1471 }
1472 }
1473 sp = sp->next();
1474 }
1475
1476 // Check for an exploded module build in use with -Xshare:dump.
1477 if (!has_jimage()) {
1478 vm_exit_during_initialization("Dumping the shared archive is not supported with an exploded module build");
1479 }
1480 }
1481 #endif
1482
1483 //===========================================================================================================
1484 // Setting int/mixed/comp mode flags
1485
1486 void Arguments::set_mode_flags(Mode mode) {
1487 // Set up default values for all flags.
1488 // If you add a flag to any of the branches below,
1489 // add a default value for it here.
1490 set_java_compiler(false);
1491 _mode = mode;
1492
1493 // Ensure Agent_OnLoad has the correct initial values.
1494 // This may not be the final mode; mode may change later in onload phase.
1495 PropertyList_unique_add(&_system_properties, "java.vm.info",
1496 VM_Version::vm_info_string(), AddProperty, UnwriteableProperty, ExternalProperty);
1497
1498 UseInterpreter = true;
1499 UseCompiler = true;
1500 UseLoopCounter = true;
1501
1502 // Default values may be platform/compiler dependent -
1503 // use the saved values
1504 ClipInlining = Arguments::_ClipInlining;
1505 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods;
1506 UseOnStackReplacement = Arguments::_UseOnStackReplacement;
1507 BackgroundCompilation = Arguments::_BackgroundCompilation;
1508 if (TieredCompilation) {
1509 if (FLAG_IS_DEFAULT(Tier3InvokeNotifyFreqLog)) {
1510 Tier3InvokeNotifyFreqLog = Arguments::_Tier3InvokeNotifyFreqLog;
1511 }
1512 if (FLAG_IS_DEFAULT(Tier4InvocationThreshold)) {
1513 Tier4InvocationThreshold = Arguments::_Tier4InvocationThreshold;
1514 }
1515 }
1516
1517 // Change from defaults based on mode
1518 switch (mode) {
1519 default:
1520 ShouldNotReachHere();
1521 break;
1522 case _int:
1523 UseCompiler = false;
1524 UseLoopCounter = false;
1525 AlwaysCompileLoopMethods = false;
1526 UseOnStackReplacement = false;
1527 break;
1528 case _mixed:
1529 // same as default
1530 break;
1531 case _comp:
1532 UseInterpreter = false;
1533 BackgroundCompilation = false;
1534 ClipInlining = false;
1535 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more.
1536 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and
1537 // compile a level 4 (C2) and then continue executing it.
1538 if (TieredCompilation) {
1539 Tier3InvokeNotifyFreqLog = 0;
1540 Tier4InvocationThreshold = 0;
1541 }
1542 break;
1543 }
1544 }
1545
1546 // Conflict: required to use shared spaces (-Xshare:on), but
1547 // incompatible command line options were chosen.
1548 static void no_shared_spaces(const char* message) {
1549 if (RequireSharedSpaces) {
1550 jio_fprintf(defaultStream::error_stream(),
1551 "Class data sharing is inconsistent with other specified options.\n");
1552 vm_exit_during_initialization("Unable to use shared archive.", message);
1553 } else {
1554 FLAG_SET_DEFAULT(UseSharedSpaces, false);
1555 }
1556 }
1557
1558 // Returns threshold scaled with the value of scale.
1559 // If scale < 0.0, threshold is returned without scaling.
1560 intx Arguments::scaled_compile_threshold(intx threshold, double scale) {
1561 if (scale == 1.0 || scale < 0.0) {
1562 return threshold;
1563 } else {
1564 return (intx)(threshold * scale);
1565 }
1566 }
1567
1568 // Returns freq_log scaled with the value of scale.
1569 // Returned values are in the range of [0, InvocationCounter::number_of_count_bits + 1].
1570 // If scale < 0.0, freq_log is returned without scaling.
1571 intx Arguments::scaled_freq_log(intx freq_log, double scale) {
1572 // Check if scaling is necessary or if negative value was specified.
1573 if (scale == 1.0 || scale < 0.0) {
1574 return freq_log;
1575 }
1576 // Check values to avoid calculating log2 of 0.
1577 if (scale == 0.0 || freq_log == 0) {
1578 return 0;
1579 }
1580 // Determine the maximum notification frequency value currently supported.
1581 // The largest mask value that the interpreter/C1 can handle is
1582 // of length InvocationCounter::number_of_count_bits. Mask values are always
1583 // one bit shorter then the value of the notification frequency. Set
1584 // max_freq_bits accordingly.
1585 intx max_freq_bits = InvocationCounter::number_of_count_bits + 1;
1586 intx scaled_freq = scaled_compile_threshold((intx)1 << freq_log, scale);
1587 if (scaled_freq == 0) {
1588 // Return 0 right away to avoid calculating log2 of 0.
1589 return 0;
1590 } else if (scaled_freq > nth_bit(max_freq_bits)) {
1591 return max_freq_bits;
1592 } else {
1593 return log2_intptr(scaled_freq);
1594 }
1595 }
1596
1597 void Arguments::set_tiered_flags() {
1598 // With tiered, set default policy to AdvancedThresholdPolicy, which is 3.
1599 if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) {
1600 FLAG_SET_DEFAULT(CompilationPolicyChoice, 3);
1601 }
1602 if (CompilationPolicyChoice < 2) {
1603 vm_exit_during_initialization(
1604 "Incompatible compilation policy selected", NULL);
1605 }
1606 // Increase the code cache size - tiered compiles a lot more.
1607 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
1608 FLAG_SET_ERGO(uintx, ReservedCodeCacheSize,
1609 MIN2(CODE_CACHE_DEFAULT_LIMIT, ReservedCodeCacheSize * 5));
1610 }
1611 // Enable SegmentedCodeCache if TieredCompilation is enabled and ReservedCodeCacheSize >= 240M
1612 if (FLAG_IS_DEFAULT(SegmentedCodeCache) && ReservedCodeCacheSize >= 240*M) {
1613 FLAG_SET_ERGO(bool, SegmentedCodeCache, true);
1614 }
1615 if (!UseInterpreter) { // -Xcomp
1616 Tier3InvokeNotifyFreqLog = 0;
1617 Tier4InvocationThreshold = 0;
1618 }
1619
1620 if (CompileThresholdScaling < 0) {
1621 vm_exit_during_initialization("Negative value specified for CompileThresholdScaling", NULL);
1622 }
1623
1624 // Scale tiered compilation thresholds.
1625 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves compilation thresholds unchanged.
1626 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
1627 FLAG_SET_ERGO(intx, Tier0InvokeNotifyFreqLog, scaled_freq_log(Tier0InvokeNotifyFreqLog));
1628 FLAG_SET_ERGO(intx, Tier0BackedgeNotifyFreqLog, scaled_freq_log(Tier0BackedgeNotifyFreqLog));
1629
1630 FLAG_SET_ERGO(intx, Tier3InvocationThreshold, scaled_compile_threshold(Tier3InvocationThreshold));
1631 FLAG_SET_ERGO(intx, Tier3MinInvocationThreshold, scaled_compile_threshold(Tier3MinInvocationThreshold));
1632 FLAG_SET_ERGO(intx, Tier3CompileThreshold, scaled_compile_threshold(Tier3CompileThreshold));
1633 FLAG_SET_ERGO(intx, Tier3BackEdgeThreshold, scaled_compile_threshold(Tier3BackEdgeThreshold));
1634
1635 // Tier2{Invocation,MinInvocation,Compile,Backedge}Threshold should be scaled here
1636 // once these thresholds become supported.
1637
1638 FLAG_SET_ERGO(intx, Tier2InvokeNotifyFreqLog, scaled_freq_log(Tier2InvokeNotifyFreqLog));
1639 FLAG_SET_ERGO(intx, Tier2BackedgeNotifyFreqLog, scaled_freq_log(Tier2BackedgeNotifyFreqLog));
1640
1641 FLAG_SET_ERGO(intx, Tier3InvokeNotifyFreqLog, scaled_freq_log(Tier3InvokeNotifyFreqLog));
1642 FLAG_SET_ERGO(intx, Tier3BackedgeNotifyFreqLog, scaled_freq_log(Tier3BackedgeNotifyFreqLog));
1643
1644 FLAG_SET_ERGO(intx, Tier23InlineeNotifyFreqLog, scaled_freq_log(Tier23InlineeNotifyFreqLog));
1645
1646 FLAG_SET_ERGO(intx, Tier4InvocationThreshold, scaled_compile_threshold(Tier4InvocationThreshold));
1647 FLAG_SET_ERGO(intx, Tier4MinInvocationThreshold, scaled_compile_threshold(Tier4MinInvocationThreshold));
1648 FLAG_SET_ERGO(intx, Tier4CompileThreshold, scaled_compile_threshold(Tier4CompileThreshold));
1649 FLAG_SET_ERGO(intx, Tier4BackEdgeThreshold, scaled_compile_threshold(Tier4BackEdgeThreshold));
1650 }
1651 }
1652
1653 void set_object_alignment() {
1654 // Object alignment.
1655 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2");
1656 MinObjAlignmentInBytes = ObjectAlignmentInBytes;
1657 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small");
1658 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize;
1659 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect");
1660 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1;
1661
1662 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes);
1663 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize;
1664
1665 // Oop encoding heap max
1666 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes;
1667
1668 if (SurvivorAlignmentInBytes == 0) {
1669 SurvivorAlignmentInBytes = ObjectAlignmentInBytes;
1670 }
1671 }
1672
1673 size_t Arguments::max_heap_for_compressed_oops() {
1674 // Avoid sign flip.
1675 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size");
1676 // We need to fit both the NULL page and the heap into the memory budget, while
1677 // keeping alignment constraints of the heap. To guarantee the latter, as the
1678 // NULL page is located before the heap, we pad the NULL page to the conservative
1679 // maximum alignment that the GC may ever impose upon the heap.
1680 size_t displacement_due_to_null_page = align_up((size_t)os::vm_page_size(),
1681 _conservative_max_heap_alignment);
1682
1683 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page);
1684 NOT_LP64(ShouldNotReachHere(); return 0);
1685 }
1686
1687 void Arguments::set_use_compressed_oops() {
1688 #ifndef ZERO
1689 #ifdef _LP64
1690 // MaxHeapSize is not set up properly at this point, but
1691 // the only value that can override MaxHeapSize if we are
1692 // to use UseCompressedOops is InitialHeapSize.
1693 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize);
1694
1695 if (max_heap_size <= max_heap_for_compressed_oops()) {
1696 #if !defined(COMPILER1) || defined(TIERED)
1697 if (FLAG_IS_DEFAULT(UseCompressedOops)) {
1698 FLAG_SET_ERGO(bool, UseCompressedOops, true);
1699 }
1700 #endif
1701 } else {
1702 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) {
1703 warning("Max heap size too large for Compressed Oops");
1704 FLAG_SET_DEFAULT(UseCompressedOops, false);
1705 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1706 }
1707 }
1708 #endif // _LP64
1709 #endif // ZERO
1710 }
1711
1712
1713 // NOTE: set_use_compressed_klass_ptrs() must be called after calling
1714 // set_use_compressed_oops().
1715 void Arguments::set_use_compressed_klass_ptrs() {
1716 #ifndef ZERO
1717 #ifdef _LP64
1718 // UseCompressedOops must be on for UseCompressedClassPointers to be on.
1719 if (!UseCompressedOops) {
1720 if (UseCompressedClassPointers) {
1721 warning("UseCompressedClassPointers requires UseCompressedOops");
1722 }
1723 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1724 } else {
1725 // Turn on UseCompressedClassPointers too
1726 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) {
1727 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true);
1728 }
1729 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs.
1730 if (UseCompressedClassPointers) {
1731 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) {
1732 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers");
1733 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1734 }
1735 }
1736 }
1737 #endif // _LP64
1738 #endif // !ZERO
1739 }
1740
1741 void Arguments::set_conservative_max_heap_alignment() {
1742 // The conservative maximum required alignment for the heap is the maximum of
1743 // the alignments imposed by several sources: any requirements from the heap
1744 // itself, the collector policy and the maximum page size we may run the VM
1745 // with.
1746 size_t heap_alignment = GCArguments::arguments()->conservative_max_heap_alignment();
1747 _conservative_max_heap_alignment = MAX4(heap_alignment,
1748 (size_t)os::vm_allocation_granularity(),
1749 os::max_page_size(),
1750 CollectorPolicy::compute_heap_alignment());
1751 }
1752
1753 #ifdef TIERED
1754 bool Arguments::compilation_mode_selected() {
1755 return !FLAG_IS_DEFAULT(TieredCompilation) || !FLAG_IS_DEFAULT(TieredStopAtLevel) ||
1756 !FLAG_IS_DEFAULT(UseAOT) JVMCI_ONLY(|| !FLAG_IS_DEFAULT(EnableJVMCI) || !FLAG_IS_DEFAULT(UseJVMCICompiler));
1757
1758 }
1759
1760 void Arguments::select_compilation_mode_ergonomically() {
1761 #if defined(_WINDOWS) && !defined(_LP64)
1762 if (FLAG_IS_DEFAULT(NeverActAsServerClassMachine)) {
1763 FLAG_SET_ERGO(bool, NeverActAsServerClassMachine, true);
1764 }
1765 #endif
1766 if (NeverActAsServerClassMachine) {
1767 set_client_compilation_mode();
1768 }
1769 }
1770 #endif //TIERED
1771
1772 #if INCLUDE_JVMCI
1773 void Arguments::set_jvmci_specific_flags() {
1774 if (UseJVMCICompiler) {
1775 if (FLAG_IS_DEFAULT(TypeProfileWidth)) {
1776 FLAG_SET_DEFAULT(TypeProfileWidth, 8);
1777 }
1778 if (FLAG_IS_DEFAULT(OnStackReplacePercentage)) {
1779 FLAG_SET_DEFAULT(OnStackReplacePercentage, 933);
1780 }
1781 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
1782 FLAG_SET_DEFAULT(ReservedCodeCacheSize, 64*M);
1783 }
1784 if (FLAG_IS_DEFAULT(InitialCodeCacheSize)) {
1785 FLAG_SET_DEFAULT(InitialCodeCacheSize, 16*M);
1786 }
1787 if (FLAG_IS_DEFAULT(MetaspaceSize)) {
1788 FLAG_SET_DEFAULT(MetaspaceSize, 12*M);
1789 }
1790 if (FLAG_IS_DEFAULT(NewSizeThreadIncrease)) {
1791 FLAG_SET_DEFAULT(NewSizeThreadIncrease, 4*K);
1792 }
1793 if (TieredStopAtLevel != CompLevel_full_optimization) {
1794 // Currently JVMCI compiler can only work at the full optimization level
1795 warning("forcing TieredStopAtLevel to full optimization because JVMCI is enabled");
1796 TieredStopAtLevel = CompLevel_full_optimization;
1797 }
1798 if (FLAG_IS_DEFAULT(TypeProfileLevel)) {
1799 FLAG_SET_DEFAULT(TypeProfileLevel, 0);
1800 }
1801 }
1802 }
1803 #endif
1804
1805 jint Arguments::set_ergonomics_flags() {
1806 #ifdef TIERED
1807 if (!compilation_mode_selected()) {
1808 select_compilation_mode_ergonomically();
1809 }
1810 #endif
1811
1812 jint gc_result = GCArguments::initialize();
1813 if (gc_result != JNI_OK) {
1814 return gc_result;
1815 }
1816
1817 #if COMPILER2_OR_JVMCI
1818 // Shared spaces work fine with other GCs but causes bytecode rewriting
1819 // to be disabled, which hurts interpreter performance and decreases
1820 // server performance. When -server is specified, keep the default off
1821 // unless it is asked for. Future work: either add bytecode rewriting
1822 // at link time, or rewrite bytecodes in non-shared methods.
1823 if (is_server_compilation_mode_vm() && !DumpSharedSpaces && !RequireSharedSpaces &&
1824 (FLAG_IS_DEFAULT(UseSharedSpaces) || !UseSharedSpaces)) {
1825 no_shared_spaces("COMPILER2 default: -Xshare:auto | off, have to manually setup to on.");
1826 }
1827 #endif
1828
1829 set_conservative_max_heap_alignment();
1830
1831 #ifndef ZERO
1832 #ifdef _LP64
1833 set_use_compressed_oops();
1834
1835 // set_use_compressed_klass_ptrs() must be called after calling
1836 // set_use_compressed_oops().
1837 set_use_compressed_klass_ptrs();
1838
1839 // Also checks that certain machines are slower with compressed oops
1840 // in vm_version initialization code.
1841 #endif // _LP64
1842 #endif // !ZERO
1843
1844 return JNI_OK;
1845 }
1846
1847 void Arguments::set_gc_specific_flags() {
1848 // Set GC flags
1849 GCArguments::arguments()->initialize_flags();
1850 }
1851
1852 julong Arguments::limit_by_allocatable_memory(julong limit) {
1853 julong max_allocatable;
1854 julong result = limit;
1855 if (os::has_allocatable_memory_limit(&max_allocatable)) {
1856 result = MIN2(result, max_allocatable / MaxVirtMemFraction);
1857 }
1858 return result;
1859 }
1860
1861 // Use static initialization to get the default before parsing
1862 static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress;
1863
1864 void Arguments::set_heap_size() {
1865 julong phys_mem =
1866 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM)
1867 : (julong)MaxRAM;
1868
1869 // Convert deprecated flags
1870 if (FLAG_IS_DEFAULT(MaxRAMPercentage) &&
1871 !FLAG_IS_DEFAULT(MaxRAMFraction))
1872 MaxRAMPercentage = 100.0 / MaxRAMFraction;
1873
1874 if (FLAG_IS_DEFAULT(MinRAMPercentage) &&
1875 !FLAG_IS_DEFAULT(MinRAMFraction))
1876 MinRAMPercentage = 100.0 / MinRAMFraction;
1877
1878 if (FLAG_IS_DEFAULT(InitialRAMPercentage) &&
1879 !FLAG_IS_DEFAULT(InitialRAMFraction))
1880 InitialRAMPercentage = 100.0 / InitialRAMFraction;
1881
1882 // If the maximum heap size has not been set with -Xmx,
1883 // then set it as fraction of the size of physical memory,
1884 // respecting the maximum and minimum sizes of the heap.
1885 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
1886 julong reasonable_max = (julong)((phys_mem * MaxRAMPercentage) / 100);
1887 const julong reasonable_min = (julong)((phys_mem * MinRAMPercentage) / 100);
1888 if (reasonable_min < MaxHeapSize) {
1889 // Small physical memory, so use a minimum fraction of it for the heap
1890 reasonable_max = reasonable_min;
1891 } else {
1892 // Not-small physical memory, so require a heap at least
1893 // as large as MaxHeapSize
1894 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize);
1895 }
1896
1897 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) {
1898 // Limit the heap size to ErgoHeapSizeLimit
1899 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit);
1900 }
1901 if (UseCompressedOops) {
1902 // Limit the heap size to the maximum possible when using compressed oops
1903 julong max_coop_heap = (julong)max_heap_for_compressed_oops();
1904
1905 // HeapBaseMinAddress can be greater than default but not less than.
1906 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) {
1907 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) {
1908 // matches compressed oops printing flags
1909 log_debug(gc, heap, coops)("HeapBaseMinAddress must be at least " SIZE_FORMAT
1910 " (" SIZE_FORMAT "G) which is greater than value given " SIZE_FORMAT,
1911 DefaultHeapBaseMinAddress,
1912 DefaultHeapBaseMinAddress/G,
1913 HeapBaseMinAddress);
1914 FLAG_SET_ERGO(size_t, HeapBaseMinAddress, DefaultHeapBaseMinAddress);
1915 }
1916 }
1917
1918 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) {
1919 // Heap should be above HeapBaseMinAddress to get zero based compressed oops
1920 // but it should be not less than default MaxHeapSize.
1921 max_coop_heap -= HeapBaseMinAddress;
1922 }
1923 reasonable_max = MIN2(reasonable_max, max_coop_heap);
1924 }
1925 reasonable_max = limit_by_allocatable_memory(reasonable_max);
1926
1927 if (!FLAG_IS_DEFAULT(InitialHeapSize)) {
1928 // An initial heap size was specified on the command line,
1929 // so be sure that the maximum size is consistent. Done
1930 // after call to limit_by_allocatable_memory because that
1931 // method might reduce the allocation size.
1932 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize);
1933 }
1934
1935 log_trace(gc, heap)(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max);
1936 FLAG_SET_ERGO(size_t, MaxHeapSize, (size_t)reasonable_max);
1937 }
1938
1939 // If the minimum or initial heap_size have not been set or requested to be set
1940 // ergonomically, set them accordingly.
1941 if (InitialHeapSize == 0 || min_heap_size() == 0) {
1942 julong reasonable_minimum = (julong)(OldSize + NewSize);
1943
1944 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize);
1945
1946 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum);
1947
1948 if (InitialHeapSize == 0) {
1949 julong reasonable_initial = (julong)((phys_mem * InitialRAMPercentage) / 100);
1950
1951 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size());
1952 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize);
1953
1954 reasonable_initial = limit_by_allocatable_memory(reasonable_initial);
1955
1956 log_trace(gc, heap)(" Initial heap size " SIZE_FORMAT, (size_t)reasonable_initial);
1957 FLAG_SET_ERGO(size_t, InitialHeapSize, (size_t)reasonable_initial);
1958 }
1959 // If the minimum heap size has not been set (via -Xms),
1960 // synchronize with InitialHeapSize to avoid errors with the default value.
1961 if (min_heap_size() == 0) {
1962 set_min_heap_size(MIN2((size_t)reasonable_minimum, InitialHeapSize));
1963 log_trace(gc, heap)(" Minimum heap size " SIZE_FORMAT, min_heap_size());
1964 }
1965 }
1966 }
1967
1968 // This option inspects the machine and attempts to set various
1969 // parameters to be optimal for long-running, memory allocation
1970 // intensive jobs. It is intended for machines with large
1971 // amounts of cpu and memory.
1972 jint Arguments::set_aggressive_heap_flags() {
1973 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit
1974 // VM, but we may not be able to represent the total physical memory
1975 // available (like having 8gb of memory on a box but using a 32bit VM).
1976 // Thus, we need to make sure we're using a julong for intermediate
1977 // calculations.
1978 julong initHeapSize;
1979 julong total_memory = os::physical_memory();
1980
1981 if (total_memory < (julong) 256 * M) {
1982 jio_fprintf(defaultStream::error_stream(),
1983 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n");
1984 vm_exit(1);
1985 }
1986
1987 // The heap size is half of available memory, or (at most)
1988 // all of possible memory less 160mb (leaving room for the OS
1989 // when using ISM). This is the maximum; because adaptive sizing
1990 // is turned on below, the actual space used may be smaller.
1991
1992 initHeapSize = MIN2(total_memory / (julong) 2,
1993 total_memory - (julong) 160 * M);
1994
1995 initHeapSize = limit_by_allocatable_memory(initHeapSize);
1996
1997 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
1998 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, initHeapSize) != Flag::SUCCESS) {
1999 return JNI_EINVAL;
2000 }
2001 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, initHeapSize) != Flag::SUCCESS) {
2002 return JNI_EINVAL;
2003 }
2004 // Currently the minimum size and the initial heap sizes are the same.
2005 set_min_heap_size(initHeapSize);
2006 }
2007 if (FLAG_IS_DEFAULT(NewSize)) {
2008 // Make the young generation 3/8ths of the total heap.
2009 if (FLAG_SET_CMDLINE(size_t, NewSize,
2010 ((julong) MaxHeapSize / (julong) 8) * (julong) 3) != Flag::SUCCESS) {
2011 return JNI_EINVAL;
2012 }
2013 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, NewSize) != Flag::SUCCESS) {
2014 return JNI_EINVAL;
2015 }
2016 }
2017
2018 #if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
2019 FLAG_SET_DEFAULT(UseLargePages, true);
2020 #endif
2021
2022 // Increase some data structure sizes for efficiency
2023 if (FLAG_SET_CMDLINE(size_t, BaseFootPrintEstimate, MaxHeapSize) != Flag::SUCCESS) {
2024 return JNI_EINVAL;
2025 }
2026 if (FLAG_SET_CMDLINE(bool, ResizeTLAB, false) != Flag::SUCCESS) {
2027 return JNI_EINVAL;
2028 }
2029 if (FLAG_SET_CMDLINE(size_t, TLABSize, 256 * K) != Flag::SUCCESS) {
2030 return JNI_EINVAL;
2031 }
2032
2033 // See the OldPLABSize comment below, but replace 'after promotion'
2034 // with 'after copying'. YoungPLABSize is the size of the survivor
2035 // space per-gc-thread buffers. The default is 4kw.
2036 if (FLAG_SET_CMDLINE(size_t, YoungPLABSize, 256 * K) != Flag::SUCCESS) { // Note: this is in words
2037 return JNI_EINVAL;
2038 }
2039
2040 // OldPLABSize is the size of the buffers in the old gen that
2041 // UseParallelGC uses to promote live data that doesn't fit in the
2042 // survivor spaces. At any given time, there's one for each gc thread.
2043 // The default size is 1kw. These buffers are rarely used, since the
2044 // survivor spaces are usually big enough. For specjbb, however, there
2045 // are occasions when there's lots of live data in the young gen
2046 // and we end up promoting some of it. We don't have a definite
2047 // explanation for why bumping OldPLABSize helps, but the theory
2048 // is that a bigger PLAB results in retaining something like the
2049 // original allocation order after promotion, which improves mutator
2050 // locality. A minor effect may be that larger PLABs reduce the
2051 // number of PLAB allocation events during gc. The value of 8kw
2052 // was arrived at by experimenting with specjbb.
2053 if (FLAG_SET_CMDLINE(size_t, OldPLABSize, 8 * K) != Flag::SUCCESS) { // Note: this is in words
2054 return JNI_EINVAL;
2055 }
2056
2057 // Enable parallel GC and adaptive generation sizing
2058 if (FLAG_SET_CMDLINE(bool, UseParallelGC, true) != Flag::SUCCESS) {
2059 return JNI_EINVAL;
2060 }
2061
2062 // Encourage steady state memory management
2063 if (FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100) != Flag::SUCCESS) {
2064 return JNI_EINVAL;
2065 }
2066
2067 // This appears to improve mutator locality
2068 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
2069 return JNI_EINVAL;
2070 }
2071
2072 // Get around early Solaris scheduling bug
2073 // (affinity vs other jobs on system)
2074 // but disallow DR and offlining (5008695).
2075 if (FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true) != Flag::SUCCESS) {
2076 return JNI_EINVAL;
2077 }
2078
2079 return JNI_OK;
2080 }
2081
2082 // This must be called after ergonomics.
2083 void Arguments::set_bytecode_flags() {
2084 if (!RewriteBytecodes) {
2085 FLAG_SET_DEFAULT(RewriteFrequentPairs, false);
2086 }
2087 }
2088
2089 // Aggressive optimization flags -XX:+AggressiveOpts
2090 jint Arguments::set_aggressive_opts_flags() {
2091 #ifdef COMPILER2
2092 if (AggressiveUnboxing) {
2093 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
2094 FLAG_SET_DEFAULT(EliminateAutoBox, true);
2095 } else if (!EliminateAutoBox) {
2096 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled");
2097 AggressiveUnboxing = false;
2098 }
2099 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) {
2100 FLAG_SET_DEFAULT(DoEscapeAnalysis, true);
2101 } else if (!DoEscapeAnalysis) {
2102 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled");
2103 AggressiveUnboxing = false;
2104 }
2105 }
2106 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
2107 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
2108 FLAG_SET_DEFAULT(EliminateAutoBox, true);
2109 }
2110 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
2111 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000);
2112 }
2113
2114 // Feed the cache size setting into the JDK
2115 char buffer[1024];
2116 jio_snprintf(buffer, 1024, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax);
2117 if (!add_property(buffer)) {
2118 return JNI_ENOMEM;
2119 }
2120 }
2121 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) {
2122 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500);
2123 }
2124 #endif
2125
2126 if (AggressiveOpts) {
2127 // Sample flag setting code
2128 // if (FLAG_IS_DEFAULT(EliminateZeroing)) {
2129 // FLAG_SET_DEFAULT(EliminateZeroing, true);
2130 // }
2131 }
2132
2133 return JNI_OK;
2134 }
2135
2136 //===========================================================================================================
2137 // Parsing of java.compiler property
2138
2139 void Arguments::process_java_compiler_argument(const char* arg) {
2140 // For backwards compatibility, Djava.compiler=NONE or ""
2141 // causes us to switch to -Xint mode UNLESS -Xdebug
2142 // is also specified.
2143 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) {
2144 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen.
2145 }
2146 }
2147
2148 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) {
2149 _sun_java_launcher = os::strdup_check_oom(launcher);
2150 }
2151
2152 bool Arguments::created_by_java_launcher() {
2153 assert(_sun_java_launcher != NULL, "property must have value");
2154 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0;
2155 }
2156
2157 bool Arguments::sun_java_launcher_is_altjvm() {
2158 return _sun_java_launcher_is_altjvm;
2159 }
2160
2161 //===========================================================================================================
2162 // Parsing of main arguments
2163
2164 #if INCLUDE_JVMCI
2165 // Check consistency of jvmci vm argument settings.
2166 bool Arguments::check_jvmci_args_consistency() {
2167 return JVMCIGlobals::check_jvmci_flags_are_consistent();
2168 }
2169 #endif //INCLUDE_JVMCI
2170
2171 // Check consistency of GC selection
2172 bool Arguments::check_gc_consistency() {
2173 // Ensure that the user has not selected conflicting sets
2174 // of collectors.
2175 uint i = 0;
2176 if (UseSerialGC) i++;
2177 if (UseConcMarkSweepGC) i++;
2178 if (UseParallelGC || UseParallelOldGC) i++;
2179 if (UseG1GC) i++;
2180 if (i > 1) {
2181 jio_fprintf(defaultStream::error_stream(),
2182 "Conflicting collector combinations in option list; "
2183 "please refer to the release notes for the combinations "
2184 "allowed\n");
2185 return false;
2186 }
2187
2188 return true;
2189 }
2190
2191 // Check the consistency of vm_init_args
2192 bool Arguments::check_vm_args_consistency() {
2193 // Method for adding checks for flag consistency.
2194 // The intent is to warn the user of all possible conflicts,
2195 // before returning an error.
2196 // Note: Needs platform-dependent factoring.
2197 bool status = true;
2198
2199 if (TLABRefillWasteFraction == 0) {
2200 jio_fprintf(defaultStream::error_stream(),
2201 "TLABRefillWasteFraction should be a denominator, "
2202 "not " SIZE_FORMAT "\n",
2203 TLABRefillWasteFraction);
2204 status = false;
2205 }
2206
2207 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) {
2208 MarkSweepAlwaysCompactCount = 1; // Move objects every gc.
2209 }
2210
2211 if (!(UseParallelGC || UseParallelOldGC) && FLAG_IS_DEFAULT(ScavengeBeforeFullGC)) {
2212 FLAG_SET_DEFAULT(ScavengeBeforeFullGC, false);
2213 }
2214
2215 if (GCTimeLimit == 100) {
2216 // Turn off gc-overhead-limit-exceeded checks
2217 FLAG_SET_DEFAULT(UseGCOverheadLimit, false);
2218 }
2219
2220 status = status && check_gc_consistency();
2221
2222 // CMS space iteration, which FLSVerifyAllHeapreferences entails,
2223 // insists that we hold the requisite locks so that the iteration is
2224 // MT-safe. For the verification at start-up and shut-down, we don't
2225 // yet have a good way of acquiring and releasing these locks,
2226 // which are not visible at the CollectedHeap level. We want to
2227 // be able to acquire these locks and then do the iteration rather
2228 // than just disable the lock verification. This will be fixed under
2229 // bug 4788986.
2230 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) {
2231 if (VerifyDuringStartup) {
2232 warning("Heap verification at start-up disabled "
2233 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
2234 VerifyDuringStartup = false; // Disable verification at start-up
2235 }
2236
2237 if (VerifyBeforeExit) {
2238 warning("Heap verification at shutdown disabled "
2239 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
2240 VerifyBeforeExit = false; // Disable verification at shutdown
2241 }
2242 }
2243
2244 if (PrintNMTStatistics) {
2245 #if INCLUDE_NMT
2246 if (MemTracker::tracking_level() == NMT_off) {
2247 #endif // INCLUDE_NMT
2248 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled");
2249 PrintNMTStatistics = false;
2250 #if INCLUDE_NMT
2251 }
2252 #endif
2253 }
2254
2255 #if INCLUDE_JVMCI
2256 status = status && check_jvmci_args_consistency();
2257
2258 if (EnableJVMCI) {
2259 PropertyList_unique_add(&_system_properties, "jdk.internal.vm.ci.enabled", "true",
2260 AddProperty, UnwriteableProperty, InternalProperty);
2261
2262 if (!ScavengeRootsInCode) {
2263 warning("forcing ScavengeRootsInCode non-zero because JVMCI is enabled");
2264 ScavengeRootsInCode = 1;
2265 }
2266 }
2267 #endif
2268
2269 // Check lower bounds of the code cache
2270 // Template Interpreter code is approximately 3X larger in debug builds.
2271 uint min_code_cache_size = CodeCacheMinimumUseSpace DEBUG_ONLY(* 3);
2272 if (ReservedCodeCacheSize < InitialCodeCacheSize) {
2273 jio_fprintf(defaultStream::error_stream(),
2274 "Invalid ReservedCodeCacheSize: %dK. Must be at least InitialCodeCacheSize=%dK.\n",
2275 ReservedCodeCacheSize/K, InitialCodeCacheSize/K);
2276 status = false;
2277 } else if (ReservedCodeCacheSize < min_code_cache_size) {
2278 jio_fprintf(defaultStream::error_stream(),
2279 "Invalid ReservedCodeCacheSize=%dK. Must be at least %uK.\n", ReservedCodeCacheSize/K,
2280 min_code_cache_size/K);
2281 status = false;
2282 } else if (ReservedCodeCacheSize > CODE_CACHE_SIZE_LIMIT) {
2283 // Code cache size larger than CODE_CACHE_SIZE_LIMIT is not supported.
2284 jio_fprintf(defaultStream::error_stream(),
2285 "Invalid ReservedCodeCacheSize=%dM. Must be at most %uM.\n", ReservedCodeCacheSize/M,
2286 CODE_CACHE_SIZE_LIMIT/M);
2287 status = false;
2288 } else if (NonNMethodCodeHeapSize < min_code_cache_size) {
2289 jio_fprintf(defaultStream::error_stream(),
2290 "Invalid NonNMethodCodeHeapSize=%dK. Must be at least %uK.\n", NonNMethodCodeHeapSize/K,
2291 min_code_cache_size/K);
2292 status = false;
2293 }
2294
2295 #ifdef _LP64
2296 if (!FLAG_IS_DEFAULT(CICompilerCount) && !FLAG_IS_DEFAULT(CICompilerCountPerCPU) && CICompilerCountPerCPU) {
2297 warning("The VM option CICompilerCountPerCPU overrides CICompilerCount.");
2298 }
2299 #endif
2300
2301 #ifndef SUPPORT_RESERVED_STACK_AREA
2302 if (StackReservedPages != 0) {
2303 FLAG_SET_CMDLINE(intx, StackReservedPages, 0);
2304 warning("Reserved Stack Area not supported on this platform");
2305 }
2306 #endif
2307
2308 if (BackgroundCompilation && (CompileTheWorld || ReplayCompiles)) {
2309 if (!FLAG_IS_DEFAULT(BackgroundCompilation)) {
2310 warning("BackgroundCompilation disabled due to CompileTheWorld or ReplayCompiles options.");
2311 }
2312 FLAG_SET_CMDLINE(bool, BackgroundCompilation, false);
2313 }
2314 if (UseCompiler && is_interpreter_only()) {
2315 if (!FLAG_IS_DEFAULT(UseCompiler)) {
2316 warning("UseCompiler disabled due to -Xint.");
2317 }
2318 FLAG_SET_CMDLINE(bool, UseCompiler, false);
2319 }
2320 #ifdef COMPILER2
2321 if (PostLoopMultiversioning && !RangeCheckElimination) {
2322 if (!FLAG_IS_DEFAULT(PostLoopMultiversioning)) {
2323 warning("PostLoopMultiversioning disabled because RangeCheckElimination is disabled.");
2324 }
2325 FLAG_SET_CMDLINE(bool, PostLoopMultiversioning, false);
2326 }
2327 if (UseCountedLoopSafepoints && LoopStripMiningIter == 0) {
2328 if (!FLAG_IS_DEFAULT(UseCountedLoopSafepoints) || !FLAG_IS_DEFAULT(LoopStripMiningIter)) {
2329 warning("When counted loop safepoints are enabled, LoopStripMiningIter must be at least 1 (a safepoint every 1 iteration): setting it to 1");
2330 }
2331 LoopStripMiningIter = 1;
2332 } else if (!UseCountedLoopSafepoints && LoopStripMiningIter > 0) {
2333 if (!FLAG_IS_DEFAULT(UseCountedLoopSafepoints) || !FLAG_IS_DEFAULT(LoopStripMiningIter)) {
2334 warning("Disabling counted safepoints implies no loop strip mining: setting LoopStripMiningIter to 0");
2335 }
2336 LoopStripMiningIter = 0;
2337 }
2338 if (FLAG_IS_DEFAULT(LoopStripMiningIterShortLoop)) {
2339 // blind guess
2340 LoopStripMiningIterShortLoop = LoopStripMiningIter / 10;
2341 }
2342 #endif
2343 if (!FLAG_IS_DEFAULT(AllocateHeapAt)) {
2344 if ((UseNUMAInterleaving && !FLAG_IS_DEFAULT(UseNUMAInterleaving)) || (UseNUMA && !FLAG_IS_DEFAULT(UseNUMA))) {
2345 log_warning(arguments) ("NUMA support for Heap depends on the file system when AllocateHeapAt option is used.\n");
2346 }
2347 }
2348 return status;
2349 }
2350
2351 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore,
2352 const char* option_type) {
2353 if (ignore) return false;
2354
2355 const char* spacer = " ";
2356 if (option_type == NULL) {
2357 option_type = ++spacer; // Set both to the empty string.
2358 }
2359
2360 if (os::obsolete_option(option)) {
2361 jio_fprintf(defaultStream::error_stream(),
2362 "Obsolete %s%soption: %s\n", option_type, spacer,
2363 option->optionString);
2364 return false;
2365 } else {
2366 jio_fprintf(defaultStream::error_stream(),
2367 "Unrecognized %s%soption: %s\n", option_type, spacer,
2368 option->optionString);
2369 return true;
2370 }
2371 }
2372
2373 static const char* user_assertion_options[] = {
2374 "-da", "-ea", "-disableassertions", "-enableassertions", 0
2375 };
2376
2377 static const char* system_assertion_options[] = {
2378 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0
2379 };
2380
2381 bool Arguments::parse_uintx(const char* value,
2382 uintx* uintx_arg,
2383 uintx min_size) {
2384
2385 // Check the sign first since atojulong() parses only unsigned values.
2386 bool value_is_positive = !(*value == '-');
2387
2388 if (value_is_positive) {
2389 julong n;
2390 bool good_return = atojulong(value, &n);
2391 if (good_return) {
2392 bool above_minimum = n >= min_size;
2393 bool value_is_too_large = n > max_uintx;
2394
2395 if (above_minimum && !value_is_too_large) {
2396 *uintx_arg = n;
2397 return true;
2398 }
2399 }
2400 }
2401 return false;
2402 }
2403
2404 unsigned int addreads_count = 0;
2405 unsigned int addexports_count = 0;
2406 unsigned int addopens_count = 0;
2407 unsigned int addmods_count = 0;
2408 unsigned int patch_mod_count = 0;
2409
2410 bool Arguments::create_property(const char* prop_name, const char* prop_value, PropertyInternal internal) {
2411 size_t prop_len = strlen(prop_name) + strlen(prop_value) + 2;
2412 char* property = AllocateHeap(prop_len, mtArguments);
2413 int ret = jio_snprintf(property, prop_len, "%s=%s", prop_name, prop_value);
2414 if (ret < 0 || ret >= (int)prop_len) {
2415 FreeHeap(property);
2416 return false;
2417 }
2418 bool added = add_property(property, UnwriteableProperty, internal);
2419 FreeHeap(property);
2420 return added;
2421 }
2422
2423 bool Arguments::create_numbered_property(const char* prop_base_name, const char* prop_value, unsigned int count) {
2424 const unsigned int props_count_limit = 1000;
2425 const int max_digits = 3;
2426 const int extra_symbols_count = 3; // includes '.', '=', '\0'
2427
2428 // Make sure count is < props_count_limit. Otherwise, memory allocation will be too small.
2429 if (count < props_count_limit) {
2430 size_t prop_len = strlen(prop_base_name) + strlen(prop_value) + max_digits + extra_symbols_count;
2431 char* property = AllocateHeap(prop_len, mtArguments);
2432 int ret = jio_snprintf(property, prop_len, "%s.%d=%s", prop_base_name, count, prop_value);
2433 if (ret < 0 || ret >= (int)prop_len) {
2434 FreeHeap(property);
2435 jio_fprintf(defaultStream::error_stream(), "Failed to create property %s.%d=%s\n", prop_base_name, count, prop_value);
2436 return false;
2437 }
2438 bool added = add_property(property, UnwriteableProperty, InternalProperty);
2439 FreeHeap(property);
2440 return added;
2441 }
2442
2443 jio_fprintf(defaultStream::error_stream(), "Property count limit exceeded: %s, limit=%d\n", prop_base_name, props_count_limit);
2444 return false;
2445 }
2446
2447 Arguments::ArgsRange Arguments::parse_memory_size(const char* s,
2448 julong* long_arg,
2449 julong min_size,
2450 julong max_size) {
2451 if (!atojulong(s, long_arg)) return arg_unreadable;
2452 return check_memory_size(*long_arg, min_size, max_size);
2453 }
2454
2455 // Parse JavaVMInitArgs structure
2456
2457 jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args,
2458 const JavaVMInitArgs *java_options_args,
2459 const JavaVMInitArgs *cmd_line_args) {
2460 bool patch_mod_javabase = false;
2461
2462 // Save default settings for some mode flags
2463 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
2464 Arguments::_UseOnStackReplacement = UseOnStackReplacement;
2465 Arguments::_ClipInlining = ClipInlining;
2466 Arguments::_BackgroundCompilation = BackgroundCompilation;
2467 if (TieredCompilation) {
2468 Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
2469 Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
2470 }
2471
2472 // Setup flags for mixed which is the default
2473 set_mode_flags(_mixed);
2474
2475 // Parse args structure generated from JAVA_TOOL_OPTIONS environment
2476 // variable (if present).
2477 jint result = parse_each_vm_init_arg(java_tool_options_args, &patch_mod_javabase, Flag::ENVIRON_VAR);
2478 if (result != JNI_OK) {
2479 return result;
2480 }
2481
2482 // Parse args structure generated from the command line flags.
2483 result = parse_each_vm_init_arg(cmd_line_args, &patch_mod_javabase, Flag::COMMAND_LINE);
2484 if (result != JNI_OK) {
2485 return result;
2486 }
2487
2488 // Parse args structure generated from the _JAVA_OPTIONS environment
2489 // variable (if present) (mimics classic VM)
2490 result = parse_each_vm_init_arg(java_options_args, &patch_mod_javabase, Flag::ENVIRON_VAR);
2491 if (result != JNI_OK) {
2492 return result;
2493 }
2494
2495 // We need to ensure processor and memory resources have been properly
2496 // configured - which may rely on arguments we just processed - before
2497 // doing the final argument processing. Any argument processing that
2498 // needs to know about processor and memory resources must occur after
2499 // this point.
2500
2501 os::init_container_support();
2502
2503 // Do final processing now that all arguments have been parsed
2504 result = finalize_vm_init_args(patch_mod_javabase);
2505 if (result != JNI_OK) {
2506 return result;
2507 }
2508
2509 return JNI_OK;
2510 }
2511
2512 // Checks if name in command-line argument -agent{lib,path}:name[=options]
2513 // represents a valid JDWP agent. is_path==true denotes that we
2514 // are dealing with -agentpath (case where name is a path), otherwise with
2515 // -agentlib
2516 bool valid_jdwp_agent(char *name, bool is_path) {
2517 char *_name;
2518 const char *_jdwp = "jdwp";
2519 size_t _len_jdwp, _len_prefix;
2520
2521 if (is_path) {
2522 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) {
2523 return false;
2524 }
2525
2526 _name++; // skip past last path separator
2527 _len_prefix = strlen(JNI_LIB_PREFIX);
2528
2529 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) {
2530 return false;
2531 }
2532
2533 _name += _len_prefix;
2534 _len_jdwp = strlen(_jdwp);
2535
2536 if (strncmp(_name, _jdwp, _len_jdwp) == 0) {
2537 _name += _len_jdwp;
2538 }
2539 else {
2540 return false;
2541 }
2542
2543 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) {
2544 return false;
2545 }
2546
2547 return true;
2548 }
2549
2550 if (strcmp(name, _jdwp) == 0) {
2551 return true;
2552 }
2553
2554 return false;
2555 }
2556
2557 int Arguments::process_patch_mod_option(const char* patch_mod_tail, bool* patch_mod_javabase) {
2558 // --patch-module=<module>=<file>(<pathsep><file>)*
2559 assert(patch_mod_tail != NULL, "Unexpected NULL patch-module value");
2560 // Find the equal sign between the module name and the path specification
2561 const char* module_equal = strchr(patch_mod_tail, '=');
2562 if (module_equal == NULL) {
2563 jio_fprintf(defaultStream::output_stream(), "Missing '=' in --patch-module specification\n");
2564 return JNI_ERR;
2565 } else {
2566 // Pick out the module name
2567 size_t module_len = module_equal - patch_mod_tail;
2568 char* module_name = NEW_C_HEAP_ARRAY_RETURN_NULL(char, module_len+1, mtArguments);
2569 if (module_name != NULL) {
2570 memcpy(module_name, patch_mod_tail, module_len);
2571 *(module_name + module_len) = '\0';
2572 // The path piece begins one past the module_equal sign
2573 add_patch_mod_prefix(module_name, module_equal + 1, patch_mod_javabase);
2574 FREE_C_HEAP_ARRAY(char, module_name);
2575 if (!create_numbered_property("jdk.module.patch", patch_mod_tail, patch_mod_count++)) {
2576 return JNI_ENOMEM;
2577 }
2578 } else {
2579 return JNI_ENOMEM;
2580 }
2581 }
2582 return JNI_OK;
2583 }
2584
2585 // Parse -Xss memory string parameter and convert to ThreadStackSize in K.
2586 jint Arguments::parse_xss(const JavaVMOption* option, const char* tail, intx* out_ThreadStackSize) {
2587 // The min and max sizes match the values in globals.hpp, but scaled
2588 // with K. The values have been chosen so that alignment with page
2589 // size doesn't change the max value, which makes the conversions
2590 // back and forth between Xss value and ThreadStackSize value easier.
2591 // The values have also been chosen to fit inside a 32-bit signed type.
2592 const julong min_ThreadStackSize = 0;
2593 const julong max_ThreadStackSize = 1 * M;
2594
2595 const julong min_size = min_ThreadStackSize * K;
2596 const julong max_size = max_ThreadStackSize * K;
2597
2598 assert(is_aligned(max_size, os::vm_page_size()), "Implementation assumption");
2599
2600 julong size = 0;
2601 ArgsRange errcode = parse_memory_size(tail, &size, min_size, max_size);
2602 if (errcode != arg_in_range) {
2603 bool silent = (option == NULL); // Allow testing to silence error messages
2604 if (!silent) {
2605 jio_fprintf(defaultStream::error_stream(),
2606 "Invalid thread stack size: %s\n", option->optionString);
2607 describe_range_error(errcode);
2608 }
2609 return JNI_EINVAL;
2610 }
2611
2612 // Internally track ThreadStackSize in units of 1024 bytes.
2613 const julong size_aligned = align_up(size, K);
2614 assert(size <= size_aligned,
2615 "Overflow: " JULONG_FORMAT " " JULONG_FORMAT,
2616 size, size_aligned);
2617
2618 const julong size_in_K = size_aligned / K;
2619 assert(size_in_K < (julong)max_intx,
2620 "size_in_K doesn't fit in the type of ThreadStackSize: " JULONG_FORMAT,
2621 size_in_K);
2622
2623 // Check that code expanding ThreadStackSize to a page aligned number of bytes won't overflow.
2624 const julong max_expanded = align_up(size_in_K * K, os::vm_page_size());
2625 assert(max_expanded < max_uintx && max_expanded >= size_in_K,
2626 "Expansion overflowed: " JULONG_FORMAT " " JULONG_FORMAT,
2627 max_expanded, size_in_K);
2628
2629 *out_ThreadStackSize = (intx)size_in_K;
2630
2631 return JNI_OK;
2632 }
2633
2634 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args, bool* patch_mod_javabase, Flag::Flags origin) {
2635 // For match_option to return remaining or value part of option string
2636 const char* tail;
2637
2638 // iterate over arguments
2639 for (int index = 0; index < args->nOptions; index++) {
2640 bool is_absolute_path = false; // for -agentpath vs -agentlib
2641
2642 const JavaVMOption* option = args->options + index;
2643
2644 if (!match_option(option, "-Djava.class.path", &tail) &&
2645 !match_option(option, "-Dsun.java.command", &tail) &&
2646 !match_option(option, "-Dsun.java.launcher", &tail)) {
2647
2648 // add all jvm options to the jvm_args string. This string
2649 // is used later to set the java.vm.args PerfData string constant.
2650 // the -Djava.class.path and the -Dsun.java.command options are
2651 // omitted from jvm_args string as each have their own PerfData
2652 // string constant object.
2653 build_jvm_args(option->optionString);
2654 }
2655
2656 // -verbose:[class/module/gc/jni]
2657 if (match_option(option, "-verbose", &tail)) {
2658 if (!strcmp(tail, ":class") || !strcmp(tail, "")) {
2659 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, load));
2660 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, unload));
2661 } else if (!strcmp(tail, ":module")) {
2662 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, load));
2663 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(module, unload));
2664 } else if (!strcmp(tail, ":gc")) {
2665 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
2666 } else if (!strcmp(tail, ":jni")) {
2667 if (FLAG_SET_CMDLINE(bool, PrintJNIResolving, true) != Flag::SUCCESS) {
2668 return JNI_EINVAL;
2669 }
2670 }
2671 // -da / -ea / -disableassertions / -enableassertions
2672 // These accept an optional class/package name separated by a colon, e.g.,
2673 // -da:java.lang.Thread.
2674 } else if (match_option(option, user_assertion_options, &tail, true)) {
2675 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2676 if (*tail == '\0') {
2677 JavaAssertions::setUserClassDefault(enable);
2678 } else {
2679 assert(*tail == ':', "bogus match by match_option()");
2680 JavaAssertions::addOption(tail + 1, enable);
2681 }
2682 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions
2683 } else if (match_option(option, system_assertion_options, &tail, false)) {
2684 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2685 JavaAssertions::setSystemClassDefault(enable);
2686 // -bootclasspath:
2687 } else if (match_option(option, "-Xbootclasspath:", &tail)) {
2688 jio_fprintf(defaultStream::output_stream(),
2689 "-Xbootclasspath is no longer a supported option.\n");
2690 return JNI_EINVAL;
2691 // -bootclasspath/a:
2692 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) {
2693 Arguments::append_sysclasspath(tail);
2694 // -bootclasspath/p:
2695 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) {
2696 jio_fprintf(defaultStream::output_stream(),
2697 "-Xbootclasspath/p is no longer a supported option.\n");
2698 return JNI_EINVAL;
2699 // -Xrun
2700 } else if (match_option(option, "-Xrun", &tail)) {
2701 if (tail != NULL) {
2702 const char* pos = strchr(tail, ':');
2703 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2704 char* name = NEW_C_HEAP_ARRAY(char, len + 1, mtArguments);
2705 jio_snprintf(name, len + 1, "%s", tail);
2706
2707 char *options = NULL;
2708 if(pos != NULL) {
2709 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied.
2710 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtArguments), pos+1, len2);
2711 }
2712 #if !INCLUDE_JVMTI
2713 if (strcmp(name, "jdwp") == 0) {
2714 jio_fprintf(defaultStream::error_stream(),
2715 "Debugging agents are not supported in this VM\n");
2716 return JNI_ERR;
2717 }
2718 #endif // !INCLUDE_JVMTI
2719 add_init_library(name, options);
2720 }
2721 } else if (match_option(option, "--add-reads=", &tail)) {
2722 if (!create_numbered_property("jdk.module.addreads", tail, addreads_count++)) {
2723 return JNI_ENOMEM;
2724 }
2725 } else if (match_option(option, "--add-exports=", &tail)) {
2726 if (!create_numbered_property("jdk.module.addexports", tail, addexports_count++)) {
2727 return JNI_ENOMEM;
2728 }
2729 } else if (match_option(option, "--add-opens=", &tail)) {
2730 if (!create_numbered_property("jdk.module.addopens", tail, addopens_count++)) {
2731 return JNI_ENOMEM;
2732 }
2733 } else if (match_option(option, "--add-modules=", &tail)) {
2734 if (!create_numbered_property("jdk.module.addmods", tail, addmods_count++)) {
2735 return JNI_ENOMEM;
2736 }
2737 } else if (match_option(option, "--limit-modules=", &tail)) {
2738 if (!create_property("jdk.module.limitmods", tail, InternalProperty)) {
2739 return JNI_ENOMEM;
2740 }
2741 } else if (match_option(option, "--module-path=", &tail)) {
2742 if (!create_property("jdk.module.path", tail, ExternalProperty)) {
2743 return JNI_ENOMEM;
2744 }
2745 } else if (match_option(option, "--upgrade-module-path=", &tail)) {
2746 if (!create_property("jdk.module.upgrade.path", tail, ExternalProperty)) {
2747 return JNI_ENOMEM;
2748 }
2749 } else if (match_option(option, "--patch-module=", &tail)) {
2750 // --patch-module=<module>=<file>(<pathsep><file>)*
2751 int res = process_patch_mod_option(tail, patch_mod_javabase);
2752 if (res != JNI_OK) {
2753 return res;
2754 }
2755 } else if (match_option(option, "--illegal-access=", &tail)) {
2756 if (!create_property("jdk.module.illegalAccess", tail, ExternalProperty)) {
2757 return JNI_ENOMEM;
2758 }
2759 // -agentlib and -agentpath
2760 } else if (match_option(option, "-agentlib:", &tail) ||
2761 (is_absolute_path = match_option(option, "-agentpath:", &tail))) {
2762 if(tail != NULL) {
2763 const char* pos = strchr(tail, '=');
2764 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2765 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtArguments), tail, len);
2766 name[len] = '\0';
2767
2768 char *options = NULL;
2769 if(pos != NULL) {
2770 options = os::strdup_check_oom(pos + 1, mtArguments);
2771 }
2772 #if !INCLUDE_JVMTI
2773 if (valid_jdwp_agent(name, is_absolute_path)) {
2774 jio_fprintf(defaultStream::error_stream(),
2775 "Debugging agents are not supported in this VM\n");
2776 return JNI_ERR;
2777 }
2778 #endif // !INCLUDE_JVMTI
2779 add_init_agent(name, options, is_absolute_path);
2780 }
2781 // -javaagent
2782 } else if (match_option(option, "-javaagent:", &tail)) {
2783 #if !INCLUDE_JVMTI
2784 jio_fprintf(defaultStream::error_stream(),
2785 "Instrumentation agents are not supported in this VM\n");
2786 return JNI_ERR;
2787 #else
2788 if (tail != NULL) {
2789 size_t length = strlen(tail) + 1;
2790 char *options = NEW_C_HEAP_ARRAY(char, length, mtArguments);
2791 jio_snprintf(options, length, "%s", tail);
2792 add_instrument_agent("instrument", options, false);
2793 // java agents need module java.instrument
2794 if (!create_numbered_property("jdk.module.addmods", "java.instrument", addmods_count++)) {
2795 return JNI_ENOMEM;
2796 }
2797 }
2798 #endif // !INCLUDE_JVMTI
2799 // -Xnoclassgc
2800 } else if (match_option(option, "-Xnoclassgc")) {
2801 if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != Flag::SUCCESS) {
2802 return JNI_EINVAL;
2803 }
2804 // -Xconcgc
2805 } else if (match_option(option, "-Xconcgc")) {
2806 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true) != Flag::SUCCESS) {
2807 return JNI_EINVAL;
2808 }
2809 handle_extra_cms_flags("-Xconcgc uses UseConcMarkSweepGC");
2810 // -Xnoconcgc
2811 } else if (match_option(option, "-Xnoconcgc")) {
2812 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false) != Flag::SUCCESS) {
2813 return JNI_EINVAL;
2814 }
2815 handle_extra_cms_flags("-Xnoconcgc uses UseConcMarkSweepGC");
2816 // -Xbatch
2817 } else if (match_option(option, "-Xbatch")) {
2818 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
2819 return JNI_EINVAL;
2820 }
2821 // -Xmn for compatibility with other JVM vendors
2822 } else if (match_option(option, "-Xmn", &tail)) {
2823 julong long_initial_young_size = 0;
2824 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1);
2825 if (errcode != arg_in_range) {
2826 jio_fprintf(defaultStream::error_stream(),
2827 "Invalid initial young generation size: %s\n", option->optionString);
2828 describe_range_error(errcode);
2829 return JNI_EINVAL;
2830 }
2831 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
2832 return JNI_EINVAL;
2833 }
2834 if (FLAG_SET_CMDLINE(size_t, NewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
2835 return JNI_EINVAL;
2836 }
2837 // -Xms
2838 } else if (match_option(option, "-Xms", &tail)) {
2839 julong long_initial_heap_size = 0;
2840 // an initial heap size of 0 means automatically determine
2841 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0);
2842 if (errcode != arg_in_range) {
2843 jio_fprintf(defaultStream::error_stream(),
2844 "Invalid initial heap size: %s\n", option->optionString);
2845 describe_range_error(errcode);
2846 return JNI_EINVAL;
2847 }
2848 set_min_heap_size((size_t)long_initial_heap_size);
2849 // Currently the minimum size and the initial heap sizes are the same.
2850 // Can be overridden with -XX:InitialHeapSize.
2851 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, (size_t)long_initial_heap_size) != Flag::SUCCESS) {
2852 return JNI_EINVAL;
2853 }
2854 // -Xmx
2855 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) {
2856 julong long_max_heap_size = 0;
2857 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1);
2858 if (errcode != arg_in_range) {
2859 jio_fprintf(defaultStream::error_stream(),
2860 "Invalid maximum heap size: %s\n", option->optionString);
2861 describe_range_error(errcode);
2862 return JNI_EINVAL;
2863 }
2864 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, (size_t)long_max_heap_size) != Flag::SUCCESS) {
2865 return JNI_EINVAL;
2866 }
2867 // Xmaxf
2868 } else if (match_option(option, "-Xmaxf", &tail)) {
2869 char* err;
2870 int maxf = (int)(strtod(tail, &err) * 100);
2871 if (*err != '\0' || *tail == '\0') {
2872 jio_fprintf(defaultStream::error_stream(),
2873 "Bad max heap free percentage size: %s\n",
2874 option->optionString);
2875 return JNI_EINVAL;
2876 } else {
2877 if (FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf) != Flag::SUCCESS) {
2878 return JNI_EINVAL;
2879 }
2880 }
2881 // Xminf
2882 } else if (match_option(option, "-Xminf", &tail)) {
2883 char* err;
2884 int minf = (int)(strtod(tail, &err) * 100);
2885 if (*err != '\0' || *tail == '\0') {
2886 jio_fprintf(defaultStream::error_stream(),
2887 "Bad min heap free percentage size: %s\n",
2888 option->optionString);
2889 return JNI_EINVAL;
2890 } else {
2891 if (FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf) != Flag::SUCCESS) {
2892 return JNI_EINVAL;
2893 }
2894 }
2895 // -Xss
2896 } else if (match_option(option, "-Xss", &tail)) {
2897 intx value = 0;
2898 jint err = parse_xss(option, tail, &value);
2899 if (err != JNI_OK) {
2900 return err;
2901 }
2902 if (FLAG_SET_CMDLINE(intx, ThreadStackSize, value) != Flag::SUCCESS) {
2903 return JNI_EINVAL;
2904 }
2905 } else if (match_option(option, "-Xmaxjitcodesize", &tail) ||
2906 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) {
2907 julong long_ReservedCodeCacheSize = 0;
2908
2909 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1);
2910 if (errcode != arg_in_range) {
2911 jio_fprintf(defaultStream::error_stream(),
2912 "Invalid maximum code cache size: %s.\n", option->optionString);
2913 return JNI_EINVAL;
2914 }
2915 if (FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != Flag::SUCCESS) {
2916 return JNI_EINVAL;
2917 }
2918 // -green
2919 } else if (match_option(option, "-green")) {
2920 jio_fprintf(defaultStream::error_stream(),
2921 "Green threads support not available\n");
2922 return JNI_EINVAL;
2923 // -native
2924 } else if (match_option(option, "-native")) {
2925 // HotSpot always uses native threads, ignore silently for compatibility
2926 // -Xrs
2927 } else if (match_option(option, "-Xrs")) {
2928 // Classic/EVM option, new functionality
2929 if (FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true) != Flag::SUCCESS) {
2930 return JNI_EINVAL;
2931 }
2932 // -Xprof
2933 } else if (match_option(option, "-Xprof")) {
2934 char version[256];
2935 // Obsolete in JDK 10
2936 JDK_Version::jdk(10).to_string(version, sizeof(version));
2937 warning("Ignoring option %s; support was removed in %s", option->optionString, version);
2938 // -Xconcurrentio
2939 } else if (match_option(option, "-Xconcurrentio")) {
2940 if (FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true) != Flag::SUCCESS) {
2941 return JNI_EINVAL;
2942 }
2943 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
2944 return JNI_EINVAL;
2945 }
2946 if (FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1) != Flag::SUCCESS) {
2947 return JNI_EINVAL;
2948 }
2949 if (FLAG_SET_CMDLINE(bool, UseTLAB, false) != Flag::SUCCESS) {
2950 return JNI_EINVAL;
2951 }
2952 if (FLAG_SET_CMDLINE(size_t, NewSizeThreadIncrease, 16 * K) != Flag::SUCCESS) { // 20Kb per thread added to new generation
2953 return JNI_EINVAL;
2954 }
2955
2956 // -Xinternalversion
2957 } else if (match_option(option, "-Xinternalversion")) {
2958 jio_fprintf(defaultStream::output_stream(), "%s\n",
2959 VM_Version::internal_vm_info_string());
2960 vm_exit(0);
2961 #ifndef PRODUCT
2962 // -Xprintflags
2963 } else if (match_option(option, "-Xprintflags")) {
2964 CommandLineFlags::printFlags(tty, false);
2965 vm_exit(0);
2966 #endif
2967 // -D
2968 } else if (match_option(option, "-D", &tail)) {
2969 const char* value;
2970 if (match_option(option, "-Djava.endorsed.dirs=", &value) &&
2971 *value!= '\0' && strcmp(value, "\"\"") != 0) {
2972 // abort if -Djava.endorsed.dirs is set
2973 jio_fprintf(defaultStream::output_stream(),
2974 "-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n"
2975 "in modular form will be supported via the concept of upgradeable modules.\n", value);
2976 return JNI_EINVAL;
2977 }
2978 if (match_option(option, "-Djava.ext.dirs=", &value) &&
2979 *value != '\0' && strcmp(value, "\"\"") != 0) {
2980 // abort if -Djava.ext.dirs is set
2981 jio_fprintf(defaultStream::output_stream(),
2982 "-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value);
2983 return JNI_EINVAL;
2984 }
2985 // Check for module related properties. They must be set using the modules
2986 // options. For example: use "--add-modules=java.sql", not
2987 // "-Djdk.module.addmods=java.sql"
2988 if (is_internal_module_property(option->optionString + 2)) {
2989 needs_module_property_warning = true;
2990 continue;
2991 }
2992
2993 if (!add_property(tail)) {
2994 return JNI_ENOMEM;
2995 }
2996 // Out of the box management support
2997 if (match_option(option, "-Dcom.sun.management", &tail)) {
2998 #if INCLUDE_MANAGEMENT
2999 if (FLAG_SET_CMDLINE(bool, ManagementServer, true) != Flag::SUCCESS) {
3000 return JNI_EINVAL;
3001 }
3002 // management agent in module jdk.management.agent
3003 if (!create_numbered_property("jdk.module.addmods", "jdk.management.agent", addmods_count++)) {
3004 return JNI_ENOMEM;
3005 }
3006 #else
3007 jio_fprintf(defaultStream::output_stream(),
3008 "-Dcom.sun.management is not supported in this VM.\n");
3009 return JNI_ERR;
3010 #endif
3011 }
3012 // -Xint
3013 } else if (match_option(option, "-Xint")) {
3014 set_mode_flags(_int);
3015 // -Xmixed
3016 } else if (match_option(option, "-Xmixed")) {
3017 set_mode_flags(_mixed);
3018 // -Xcomp
3019 } else if (match_option(option, "-Xcomp")) {
3020 // for testing the compiler; turn off all flags that inhibit compilation
3021 set_mode_flags(_comp);
3022 // -Xshare:dump
3023 } else if (match_option(option, "-Xshare:dump")) {
3024 if (FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true) != Flag::SUCCESS) {
3025 return JNI_EINVAL;
3026 }
3027 set_mode_flags(_int); // Prevent compilation, which creates objects
3028 // -Xshare:on
3029 } else if (match_option(option, "-Xshare:on")) {
3030 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
3031 return JNI_EINVAL;
3032 }
3033 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
3034 return JNI_EINVAL;
3035 }
3036 // -Xshare:auto
3037 } else if (match_option(option, "-Xshare:auto")) {
3038 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
3039 return JNI_EINVAL;
3040 }
3041 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
3042 return JNI_EINVAL;
3043 }
3044 // -Xshare:off
3045 } else if (match_option(option, "-Xshare:off")) {
3046 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, false) != Flag::SUCCESS) {
3047 return JNI_EINVAL;
3048 }
3049 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
3050 return JNI_EINVAL;
3051 }
3052 // -Xverify
3053 } else if (match_option(option, "-Xverify", &tail)) {
3054 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) {
3055 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true) != Flag::SUCCESS) {
3056 return JNI_EINVAL;
3057 }
3058 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
3059 return JNI_EINVAL;
3060 }
3061 } else if (strcmp(tail, ":remote") == 0) {
3062 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
3063 return JNI_EINVAL;
3064 }
3065 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
3066 return JNI_EINVAL;
3067 }
3068 } else if (strcmp(tail, ":none") == 0) {
3069 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
3070 return JNI_EINVAL;
3071 }
3072 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false) != Flag::SUCCESS) {
3073 return JNI_EINVAL;
3074 }
3075 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) {
3076 return JNI_EINVAL;
3077 }
3078 // -Xdebug
3079 } else if (match_option(option, "-Xdebug")) {
3080 // note this flag has been used, then ignore
3081 set_xdebug_mode(true);
3082 // -Xnoagent
3083 } else if (match_option(option, "-Xnoagent")) {
3084 // For compatibility with classic. HotSpot refuses to load the old style agent.dll.
3085 } else if (match_option(option, "-Xloggc:", &tail)) {
3086 // Deprecated flag to redirect GC output to a file. -Xloggc:<filename>
3087 log_warning(gc)("-Xloggc is deprecated. Will use -Xlog:gc:%s instead.", tail);
3088 _gc_log_filename = os::strdup_check_oom(tail);
3089 } else if (match_option(option, "-Xlog", &tail)) {
3090 bool ret = false;
3091 if (strcmp(tail, ":help") == 0) {
3092 LogConfiguration::print_command_line_help(defaultStream::output_stream());
3093 vm_exit(0);
3094 } else if (strcmp(tail, ":disable") == 0) {
3095 LogConfiguration::disable_logging();
3096 ret = true;
3097 } else if (*tail == '\0') {
3098 ret = LogConfiguration::parse_command_line_arguments();
3099 assert(ret, "-Xlog without arguments should never fail to parse");
3100 } else if (*tail == ':') {
3101 ret = LogConfiguration::parse_command_line_arguments(tail + 1);
3102 }
3103 if (ret == false) {
3104 jio_fprintf(defaultStream::error_stream(),
3105 "Invalid -Xlog option '-Xlog%s'\n",
3106 tail);
3107 return JNI_EINVAL;
3108 }
3109 // JNI hooks
3110 } else if (match_option(option, "-Xcheck", &tail)) {
3111 if (!strcmp(tail, ":jni")) {
3112 #if !INCLUDE_JNI_CHECK
3113 warning("JNI CHECKING is not supported in this VM");
3114 #else
3115 CheckJNICalls = true;
3116 #endif // INCLUDE_JNI_CHECK
3117 } else if (is_bad_option(option, args->ignoreUnrecognized,
3118 "check")) {
3119 return JNI_EINVAL;
3120 }
3121 } else if (match_option(option, "vfprintf")) {
3122 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo);
3123 } else if (match_option(option, "exit")) {
3124 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo);
3125 } else if (match_option(option, "abort")) {
3126 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo);
3127 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure;
3128 // and the last option wins.
3129 } else if (match_option(option, "-XX:+NeverTenure")) {
3130 if (FLAG_SET_CMDLINE(bool, NeverTenure, true) != Flag::SUCCESS) {
3131 return JNI_EINVAL;
3132 }
3133 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
3134 return JNI_EINVAL;
3135 }
3136 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1) != Flag::SUCCESS) {
3137 return JNI_EINVAL;
3138 }
3139 } else if (match_option(option, "-XX:+AlwaysTenure")) {
3140 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3141 return JNI_EINVAL;
3142 }
3143 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
3144 return JNI_EINVAL;
3145 }
3146 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0) != Flag::SUCCESS) {
3147 return JNI_EINVAL;
3148 }
3149 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) {
3150 uintx max_tenuring_thresh = 0;
3151 if (!parse_uintx(tail, &max_tenuring_thresh, 0)) {
3152 jio_fprintf(defaultStream::error_stream(),
3153 "Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail);
3154 return JNI_EINVAL;
3155 }
3156
3157 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh) != Flag::SUCCESS) {
3158 return JNI_EINVAL;
3159 }
3160
3161 if (MaxTenuringThreshold == 0) {
3162 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3163 return JNI_EINVAL;
3164 }
3165 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
3166 return JNI_EINVAL;
3167 }
3168 } else {
3169 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3170 return JNI_EINVAL;
3171 }
3172 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
3173 return JNI_EINVAL;
3174 }
3175 }
3176 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) {
3177 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false) != Flag::SUCCESS) {
3178 return JNI_EINVAL;
3179 }
3180 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true) != Flag::SUCCESS) {
3181 return JNI_EINVAL;
3182 }
3183 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) {
3184 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false) != Flag::SUCCESS) {
3185 return JNI_EINVAL;
3186 }
3187 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true) != Flag::SUCCESS) {
3188 return JNI_EINVAL;
3189 }
3190 } else if (match_option(option, "-XX:+ExtendedDTraceProbes")) {
3191 #if defined(DTRACE_ENABLED)
3192 if (FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true) != Flag::SUCCESS) {
3193 return JNI_EINVAL;
3194 }
3195 if (FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true) != Flag::SUCCESS) {
3196 return JNI_EINVAL;
3197 }
3198 if (FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true) != Flag::SUCCESS) {
3199 return JNI_EINVAL;
3200 }
3201 if (FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true) != Flag::SUCCESS) {
3202 return JNI_EINVAL;
3203 }
3204 #else // defined(DTRACE_ENABLED)
3205 jio_fprintf(defaultStream::error_stream(),
3206 "ExtendedDTraceProbes flag is not applicable for this configuration\n");
3207 return JNI_EINVAL;
3208 #endif // defined(DTRACE_ENABLED)
3209 #ifdef ASSERT
3210 } else if (match_option(option, "-XX:+FullGCALot")) {
3211 if (FLAG_SET_CMDLINE(bool, FullGCALot, true) != Flag::SUCCESS) {
3212 return JNI_EINVAL;
3213 }
3214 // disable scavenge before parallel mark-compact
3215 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
3216 return JNI_EINVAL;
3217 }
3218 #endif
3219 #if !INCLUDE_MANAGEMENT
3220 } else if (match_option(option, "-XX:+ManagementServer")) {
3221 jio_fprintf(defaultStream::error_stream(),
3222 "ManagementServer is not supported in this VM.\n");
3223 return JNI_ERR;
3224 #endif // INCLUDE_MANAGEMENT
3225 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx
3226 // Skip -XX:Flags= and -XX:VMOptionsFile= since those cases have
3227 // already been handled
3228 if ((strncmp(tail, "Flags=", strlen("Flags=")) != 0) &&
3229 (strncmp(tail, "VMOptionsFile=", strlen("VMOptionsFile=")) != 0)) {
3230 if (!process_argument(tail, args->ignoreUnrecognized, origin)) {
3231 return JNI_EINVAL;
3232 }
3233 }
3234 // Unknown option
3235 } else if (is_bad_option(option, args->ignoreUnrecognized)) {
3236 return JNI_ERR;
3237 }
3238 }
3239
3240 // PrintSharedArchiveAndExit will turn on
3241 // -Xshare:on
3242 // -Xlog:class+path=info
3243 if (PrintSharedArchiveAndExit) {
3244 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
3245 return JNI_EINVAL;
3246 }
3247 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
3248 return JNI_EINVAL;
3249 }
3250 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(class, path));
3251 }
3252
3253 // Change the default value for flags which have different default values
3254 // when working with older JDKs.
3255 #ifdef LINUX
3256 if (JDK_Version::current().compare_major(6) <= 0 &&
3257 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) {
3258 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false);
3259 }
3260 #endif // LINUX
3261 fix_appclasspath();
3262 return JNI_OK;
3263 }
3264
3265 void Arguments::add_patch_mod_prefix(const char* module_name, const char* path, bool* patch_mod_javabase) {
3266 // For java.base check for duplicate --patch-module options being specified on the command line.
3267 // This check is only required for java.base, all other duplicate module specifications
3268 // will be checked during module system initialization. The module system initialization
3269 // will throw an ExceptionInInitializerError if this situation occurs.
3270 if (strcmp(module_name, JAVA_BASE_NAME) == 0) {
3271 if (*patch_mod_javabase) {
3272 vm_exit_during_initialization("Cannot specify " JAVA_BASE_NAME " more than once to --patch-module");
3273 } else {
3274 *patch_mod_javabase = true;
3275 }
3276 }
3277
3278 // Create GrowableArray lazily, only if --patch-module has been specified
3279 if (_patch_mod_prefix == NULL) {
3280 _patch_mod_prefix = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<ModulePatchPath*>(10, true);
3281 }
3282
3283 _patch_mod_prefix->push(new ModulePatchPath(module_name, path));
3284 }
3285
3286 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled)
3287 //
3288 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar
3289 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar".
3290 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty
3291 // path is treated as the current directory.
3292 //
3293 // This causes problems with CDS, which requires that all directories specified in the classpath
3294 // must be empty. In most cases, applications do NOT want to load classes from the current
3295 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up
3296 // scripts compatible with CDS.
3297 void Arguments::fix_appclasspath() {
3298 if (IgnoreEmptyClassPaths) {
3299 const char separator = *os::path_separator();
3300 const char* src = _java_class_path->value();
3301
3302 // skip over all the leading empty paths
3303 while (*src == separator) {
3304 src ++;
3305 }
3306
3307 char* copy = os::strdup_check_oom(src, mtArguments);
3308
3309 // trim all trailing empty paths
3310 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) {
3311 *tail = '\0';
3312 }
3313
3314 char from[3] = {separator, separator, '\0'};
3315 char to [2] = {separator, '\0'};
3316 while (StringUtils::replace_no_expand(copy, from, to) > 0) {
3317 // Keep replacing "::" -> ":" until we have no more "::" (non-windows)
3318 // Keep replacing ";;" -> ";" until we have no more ";;" (windows)
3319 }
3320
3321 _java_class_path->set_writeable_value(copy);
3322 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore
3323 }
3324 }
3325
3326 static bool has_jar_files(const char* directory) {
3327 DIR* dir = os::opendir(directory);
3328 if (dir == NULL) return false;
3329
3330 struct dirent *entry;
3331 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtArguments);
3332 bool hasJarFile = false;
3333 while (!hasJarFile && (entry = os::readdir(dir, (dirent *) dbuf)) != NULL) {
3334 const char* name = entry->d_name;
3335 const char* ext = name + strlen(name) - 4;
3336 hasJarFile = ext > name && (os::file_name_strcmp(ext, ".jar") == 0);
3337 }
3338 FREE_C_HEAP_ARRAY(char, dbuf);
3339 os::closedir(dir);
3340 return hasJarFile ;
3341 }
3342
3343 static int check_non_empty_dirs(const char* path) {
3344 const char separator = *os::path_separator();
3345 const char* const end = path + strlen(path);
3346 int nonEmptyDirs = 0;
3347 while (path < end) {
3348 const char* tmp_end = strchr(path, separator);
3349 if (tmp_end == NULL) {
3350 if (has_jar_files(path)) {
3351 nonEmptyDirs++;
3352 jio_fprintf(defaultStream::output_stream(),
3353 "Non-empty directory: %s\n", path);
3354 }
3355 path = end;
3356 } else {
3357 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1, mtArguments);
3358 memcpy(dirpath, path, tmp_end - path);
3359 dirpath[tmp_end - path] = '\0';
3360 if (has_jar_files(dirpath)) {
3361 nonEmptyDirs++;
3362 jio_fprintf(defaultStream::output_stream(),
3363 "Non-empty directory: %s\n", dirpath);
3364 }
3365 FREE_C_HEAP_ARRAY(char, dirpath);
3366 path = tmp_end + 1;
3367 }
3368 }
3369 return nonEmptyDirs;
3370 }
3371
3372 jint Arguments::finalize_vm_init_args(bool patch_mod_javabase) {
3373 // check if the default lib/endorsed directory exists; if so, error
3374 char path[JVM_MAXPATHLEN];
3375 const char* fileSep = os::file_separator();
3376 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep);
3377
3378 if (CheckEndorsedAndExtDirs) {
3379 int nonEmptyDirs = 0;
3380 // check endorsed directory
3381 nonEmptyDirs += check_non_empty_dirs(path);
3382 // check the extension directories
3383 nonEmptyDirs += check_non_empty_dirs(Arguments::get_ext_dirs());
3384 if (nonEmptyDirs > 0) {
3385 return JNI_ERR;
3386 }
3387 }
3388
3389 DIR* dir = os::opendir(path);
3390 if (dir != NULL) {
3391 jio_fprintf(defaultStream::output_stream(),
3392 "<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n"
3393 "in modular form will be supported via the concept of upgradeable modules.\n");
3394 os::closedir(dir);
3395 return JNI_ERR;
3396 }
3397
3398 jio_snprintf(path, JVM_MAXPATHLEN, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep);
3399 dir = os::opendir(path);
3400 if (dir != NULL) {
3401 jio_fprintf(defaultStream::output_stream(),
3402 "<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; "
3403 "Use -classpath instead.\n.");
3404 os::closedir(dir);
3405 return JNI_ERR;
3406 }
3407
3408 // This must be done after all arguments have been processed
3409 // and the container support has been initialized since AggressiveHeap
3410 // relies on the amount of total memory available.
3411 if (AggressiveHeap) {
3412 jint result = set_aggressive_heap_flags();
3413 if (result != JNI_OK) {
3414 return result;
3415 }
3416 }
3417
3418 // This must be done after all arguments have been processed.
3419 // java_compiler() true means set to "NONE" or empty.
3420 if (java_compiler() && !xdebug_mode()) {
3421 // For backwards compatibility, we switch to interpreted mode if
3422 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was
3423 // not specified.
3424 set_mode_flags(_int);
3425 }
3426
3427 // CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode),
3428 // but like -Xint, leave compilation thresholds unaffected.
3429 // With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well.
3430 if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) {
3431 set_mode_flags(_int);
3432 }
3433
3434 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set
3435 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) {
3436 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold);
3437 }
3438
3439 #if !defined(COMPILER2) && !INCLUDE_JVMCI
3440 // Don't degrade server performance for footprint
3441 if (FLAG_IS_DEFAULT(UseLargePages) &&
3442 MaxHeapSize < LargePageHeapSizeThreshold) {
3443 // No need for large granularity pages w/small heaps.
3444 // Note that large pages are enabled/disabled for both the
3445 // Java heap and the code cache.
3446 FLAG_SET_DEFAULT(UseLargePages, false);
3447 }
3448
3449 #elif defined(COMPILER2)
3450 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) {
3451 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1);
3452 }
3453 #endif
3454
3455 #if !defined(COMPILER2) && !INCLUDE_JVMCI
3456 UNSUPPORTED_OPTION(ProfileInterpreter);
3457 NOT_PRODUCT(UNSUPPORTED_OPTION(TraceProfileInterpreter));
3458 #endif
3459
3460 #ifndef TIERED
3461 // Tiered compilation is undefined.
3462 UNSUPPORTED_OPTION(TieredCompilation);
3463 #endif
3464
3465 #if INCLUDE_JVMCI
3466 if (EnableJVMCI &&
3467 !create_numbered_property("jdk.module.addmods", "jdk.internal.vm.ci", addmods_count++)) {
3468 return JNI_ENOMEM;
3469 }
3470 #endif
3471
3472 if (!check_vm_args_consistency()) {
3473 return JNI_ERR;
3474 }
3475
3476 #if INCLUDE_JVMCI
3477 if (UseJVMCICompiler) {
3478 Compilation_mode = CompMode_server;
3479 }
3480 #endif
3481
3482 #if INCLUDE_CDS
3483 if (DumpSharedSpaces) {
3484 // Disable biased locking now as it interferes with the clean up of
3485 // the archived Klasses and Java string objects (at dump time only).
3486 UseBiasedLocking = false;
3487 }
3488 if (UseSharedSpaces && patch_mod_javabase) {
3489 no_shared_spaces("CDS is disabled when " JAVA_BASE_NAME " module is patched.");
3490 }
3491 #endif
3492
3493 return JNI_OK;
3494 }
3495
3496 // Helper class for controlling the lifetime of JavaVMInitArgs
3497 // objects. The contents of the JavaVMInitArgs are guaranteed to be
3498 // deleted on the destruction of the ScopedVMInitArgs object.
3499 class ScopedVMInitArgs : public StackObj {
3500 private:
3501 JavaVMInitArgs _args;
3502 char* _container_name;
3503 bool _is_set;
3504 char* _vm_options_file_arg;
3505
3506 public:
3507 ScopedVMInitArgs(const char *container_name) {
3508 _args.version = JNI_VERSION_1_2;
3509 _args.nOptions = 0;
3510 _args.options = NULL;
3511 _args.ignoreUnrecognized = false;
3512 _container_name = (char *)container_name;
3513 _is_set = false;
3514 _vm_options_file_arg = NULL;
3515 }
3516
3517 // Populates the JavaVMInitArgs object represented by this
3518 // ScopedVMInitArgs object with the arguments in options. The
3519 // allocated memory is deleted by the destructor. If this method
3520 // returns anything other than JNI_OK, then this object is in a
3521 // partially constructed state, and should be abandoned.
3522 jint set_args(GrowableArray<JavaVMOption>* options) {
3523 _is_set = true;
3524 JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL(
3525 JavaVMOption, options->length(), mtArguments);
3526 if (options_arr == NULL) {
3527 return JNI_ENOMEM;
3528 }
3529 _args.options = options_arr;
3530
3531 for (int i = 0; i < options->length(); i++) {
3532 options_arr[i] = options->at(i);
3533 options_arr[i].optionString = os::strdup(options_arr[i].optionString);
3534 if (options_arr[i].optionString == NULL) {
3535 // Rely on the destructor to do cleanup.
3536 _args.nOptions = i;
3537 return JNI_ENOMEM;
3538 }
3539 }
3540
3541 _args.nOptions = options->length();
3542 _args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions;
3543 return JNI_OK;
3544 }
3545
3546 JavaVMInitArgs* get() { return &_args; }
3547 char* container_name() { return _container_name; }
3548 bool is_set() { return _is_set; }
3549 bool found_vm_options_file_arg() { return _vm_options_file_arg != NULL; }
3550 char* vm_options_file_arg() { return _vm_options_file_arg; }
3551
3552 void set_vm_options_file_arg(const char *vm_options_file_arg) {
3553 if (_vm_options_file_arg != NULL) {
3554 os::free(_vm_options_file_arg);
3555 }
3556 _vm_options_file_arg = os::strdup_check_oom(vm_options_file_arg);
3557 }
3558
3559 ~ScopedVMInitArgs() {
3560 if (_vm_options_file_arg != NULL) {
3561 os::free(_vm_options_file_arg);
3562 }
3563 if (_args.options == NULL) return;
3564 for (int i = 0; i < _args.nOptions; i++) {
3565 os::free(_args.options[i].optionString);
3566 }
3567 FREE_C_HEAP_ARRAY(JavaVMOption, _args.options);
3568 }
3569
3570 // Insert options into this option list, to replace option at
3571 // vm_options_file_pos (-XX:VMOptionsFile)
3572 jint insert(const JavaVMInitArgs* args,
3573 const JavaVMInitArgs* args_to_insert,
3574 const int vm_options_file_pos) {
3575 assert(_args.options == NULL, "shouldn't be set yet");
3576 assert(args_to_insert->nOptions != 0, "there should be args to insert");
3577 assert(vm_options_file_pos != -1, "vm_options_file_pos should be set");
3578
3579 int length = args->nOptions + args_to_insert->nOptions - 1;
3580 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments)
3581 GrowableArray<JavaVMOption>(length, true); // Construct new option array
3582 for (int i = 0; i < args->nOptions; i++) {
3583 if (i == vm_options_file_pos) {
3584 // insert the new options starting at the same place as the
3585 // -XX:VMOptionsFile option
3586 for (int j = 0; j < args_to_insert->nOptions; j++) {
3587 options->push(args_to_insert->options[j]);
3588 }
3589 } else {
3590 options->push(args->options[i]);
3591 }
3592 }
3593 // make into options array
3594 jint result = set_args(options);
3595 delete options;
3596 return result;
3597 }
3598 };
3599
3600 jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) {
3601 return parse_options_environment_variable("_JAVA_OPTIONS", args);
3602 }
3603
3604 jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) {
3605 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args);
3606 }
3607
3608 jint Arguments::parse_options_environment_variable(const char* name,
3609 ScopedVMInitArgs* vm_args) {
3610 char *buffer = ::getenv(name);
3611
3612 // Don't check this environment variable if user has special privileges
3613 // (e.g. unix su command).
3614 if (buffer == NULL || os::have_special_privileges()) {
3615 return JNI_OK;
3616 }
3617
3618 if ((buffer = os::strdup(buffer)) == NULL) {
3619 return JNI_ENOMEM;
3620 }
3621
3622 jio_fprintf(defaultStream::error_stream(),
3623 "Picked up %s: %s\n", name, buffer);
3624
3625 int retcode = parse_options_buffer(name, buffer, strlen(buffer), vm_args);
3626
3627 os::free(buffer);
3628 return retcode;
3629 }
3630
3631 jint Arguments::parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args) {
3632 // read file into buffer
3633 int fd = ::open(file_name, O_RDONLY);
3634 if (fd < 0) {
3635 jio_fprintf(defaultStream::error_stream(),
3636 "Could not open options file '%s'\n",
3637 file_name);
3638 return JNI_ERR;
3639 }
3640
3641 struct stat stbuf;
3642 int retcode = os::stat(file_name, &stbuf);
3643 if (retcode != 0) {
3644 jio_fprintf(defaultStream::error_stream(),
3645 "Could not stat options file '%s'\n",
3646 file_name);
3647 os::close(fd);
3648 return JNI_ERR;
3649 }
3650
3651 if (stbuf.st_size == 0) {
3652 // tell caller there is no option data and that is ok
3653 os::close(fd);
3654 return JNI_OK;
3655 }
3656
3657 // '+ 1' for NULL termination even with max bytes
3658 size_t bytes_alloc = stbuf.st_size + 1;
3659
3660 char *buf = NEW_C_HEAP_ARRAY_RETURN_NULL(char, bytes_alloc, mtArguments);
3661 if (NULL == buf) {
3662 jio_fprintf(defaultStream::error_stream(),
3663 "Could not allocate read buffer for options file parse\n");
3664 os::close(fd);
3665 return JNI_ENOMEM;
3666 }
3667
3668 memset(buf, 0, bytes_alloc);
3669
3670 // Fill buffer
3671 // Use ::read() instead of os::read because os::read()
3672 // might do a thread state transition
3673 // and it is too early for that here
3674
3675 ssize_t bytes_read = ::read(fd, (void *)buf, (unsigned)bytes_alloc);
3676 os::close(fd);
3677 if (bytes_read < 0) {
3678 FREE_C_HEAP_ARRAY(char, buf);
3679 jio_fprintf(defaultStream::error_stream(),
3680 "Could not read options file '%s'\n", file_name);
3681 return JNI_ERR;
3682 }
3683
3684 if (bytes_read == 0) {
3685 // tell caller there is no option data and that is ok
3686 FREE_C_HEAP_ARRAY(char, buf);
3687 return JNI_OK;
3688 }
3689
3690 retcode = parse_options_buffer(file_name, buf, bytes_read, vm_args);
3691
3692 FREE_C_HEAP_ARRAY(char, buf);
3693 return retcode;
3694 }
3695
3696 jint Arguments::parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args) {
3697 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtArguments) GrowableArray<JavaVMOption>(2, true); // Construct option array
3698
3699 // some pointers to help with parsing
3700 char *buffer_end = buffer + buf_len;
3701 char *opt_hd = buffer;
3702 char *wrt = buffer;
3703 char *rd = buffer;
3704
3705 // parse all options
3706 while (rd < buffer_end) {
3707 // skip leading white space from the input string
3708 while (rd < buffer_end && isspace(*rd)) {
3709 rd++;
3710 }
3711
3712 if (rd >= buffer_end) {
3713 break;
3714 }
3715
3716 // Remember this is where we found the head of the token.
3717 opt_hd = wrt;
3718
3719 // Tokens are strings of non white space characters separated
3720 // by one or more white spaces.
3721 while (rd < buffer_end && !isspace(*rd)) {
3722 if (*rd == '\'' || *rd == '"') { // handle a quoted string
3723 int quote = *rd; // matching quote to look for
3724 rd++; // don't copy open quote
3725 while (rd < buffer_end && *rd != quote) {
3726 // include everything (even spaces)
3727 // up until the close quote
3728 *wrt++ = *rd++; // copy to option string
3729 }
3730
3731 if (rd < buffer_end) {
3732 rd++; // don't copy close quote
3733 } else {
3734 // did not see closing quote
3735 jio_fprintf(defaultStream::error_stream(),
3736 "Unmatched quote in %s\n", name);
3737 delete options;
3738 return JNI_ERR;
3739 }
3740 } else {
3741 *wrt++ = *rd++; // copy to option string
3742 }
3743 }
3744
3745 // steal a white space character and set it to NULL
3746 *wrt++ = '\0';
3747 // We now have a complete token
3748
3749 JavaVMOption option;
3750 option.optionString = opt_hd;
3751 option.extraInfo = NULL;
3752
3753 options->append(option); // Fill in option
3754
3755 rd++; // Advance to next character
3756 }
3757
3758 // Fill out JavaVMInitArgs structure.
3759 jint status = vm_args->set_args(options);
3760
3761 delete options;
3762 return status;
3763 }
3764
3765 void Arguments::set_shared_spaces_flags() {
3766 if (DumpSharedSpaces) {
3767 if (FailOverToOldVerifier) {
3768 // Don't fall back to the old verifier on verification failure. If a
3769 // class fails verification with the split verifier, it might fail the
3770 // CDS runtime verifier constraint check. In that case, we don't want
3771 // to share the class. We only archive classes that pass the split verifier.
3772 FLAG_SET_DEFAULT(FailOverToOldVerifier, false);
3773 }
3774
3775 if (RequireSharedSpaces) {
3776 warning("Cannot dump shared archive while using shared archive");
3777 }
3778 UseSharedSpaces = false;
3779 #ifdef _LP64
3780 if (!UseCompressedOops || !UseCompressedClassPointers) {
3781 vm_exit_during_initialization(
3782 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL);
3783 }
3784 } else {
3785 if (!UseCompressedOops || !UseCompressedClassPointers) {
3786 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces.");
3787 }
3788 #endif
3789 }
3790 }
3791
3792 // Sharing support
3793 // Construct the path to the archive
3794 static char* get_shared_archive_path() {
3795 char *shared_archive_path;
3796 if (SharedArchiveFile == NULL) {
3797 char jvm_path[JVM_MAXPATHLEN];
3798 os::jvm_path(jvm_path, sizeof(jvm_path));
3799 char *end = strrchr(jvm_path, *os::file_separator());
3800 if (end != NULL) *end = '\0';
3801 size_t jvm_path_len = strlen(jvm_path);
3802 size_t file_sep_len = strlen(os::file_separator());
3803 const size_t len = jvm_path_len + file_sep_len + 20;
3804 shared_archive_path = NEW_C_HEAP_ARRAY(char, len, mtArguments);
3805 if (shared_archive_path != NULL) {
3806 jio_snprintf(shared_archive_path, len, "%s%sclasses.jsa",
3807 jvm_path, os::file_separator());
3808 }
3809 } else {
3810 shared_archive_path = os::strdup_check_oom(SharedArchiveFile, mtArguments);
3811 }
3812 return shared_archive_path;
3813 }
3814
3815 #ifndef PRODUCT
3816 // Determine whether LogVMOutput should be implicitly turned on.
3817 static bool use_vm_log() {
3818 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) ||
3819 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods ||
3820 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers ||
3821 PrintAssembly || TraceDeoptimization || TraceDependencies ||
3822 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) {
3823 return true;
3824 }
3825
3826 #ifdef COMPILER1
3827 if (PrintC1Statistics) {
3828 return true;
3829 }
3830 #endif // COMPILER1
3831
3832 #ifdef COMPILER2
3833 if (PrintOptoAssembly || PrintOptoStatistics) {
3834 return true;
3835 }
3836 #endif // COMPILER2
3837
3838 return false;
3839 }
3840
3841 #endif // PRODUCT
3842
3843 bool Arguments::args_contains_vm_options_file_arg(const JavaVMInitArgs* args) {
3844 for (int index = 0; index < args->nOptions; index++) {
3845 const JavaVMOption* option = args->options + index;
3846 const char* tail;
3847 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
3848 return true;
3849 }
3850 }
3851 return false;
3852 }
3853
3854 jint Arguments::insert_vm_options_file(const JavaVMInitArgs* args,
3855 const char* vm_options_file,
3856 const int vm_options_file_pos,
3857 ScopedVMInitArgs* vm_options_file_args,
3858 ScopedVMInitArgs* args_out) {
3859 jint code = parse_vm_options_file(vm_options_file, vm_options_file_args);
3860 if (code != JNI_OK) {
3861 return code;
3862 }
3863
3864 if (vm_options_file_args->get()->nOptions < 1) {
3865 return JNI_OK;
3866 }
3867
3868 if (args_contains_vm_options_file_arg(vm_options_file_args->get())) {
3869 jio_fprintf(defaultStream::error_stream(),
3870 "A VM options file may not refer to a VM options file. "
3871 "Specification of '-XX:VMOptionsFile=<file-name>' in the "
3872 "options file '%s' in options container '%s' is an error.\n",
3873 vm_options_file_args->vm_options_file_arg(),
3874 vm_options_file_args->container_name());
3875 return JNI_EINVAL;
3876 }
3877
3878 return args_out->insert(args, vm_options_file_args->get(),
3879 vm_options_file_pos);
3880 }
3881
3882 // Expand -XX:VMOptionsFile found in args_in as needed.
3883 // mod_args and args_out parameters may return values as needed.
3884 jint Arguments::expand_vm_options_as_needed(const JavaVMInitArgs* args_in,
3885 ScopedVMInitArgs* mod_args,
3886 JavaVMInitArgs** args_out) {
3887 jint code = match_special_option_and_act(args_in, mod_args);
3888 if (code != JNI_OK) {
3889 return code;
3890 }
3891
3892 if (mod_args->is_set()) {
3893 // args_in contains -XX:VMOptionsFile and mod_args contains the
3894 // original options from args_in along with the options expanded
3895 // from the VMOptionsFile. Return a short-hand to the caller.
3896 *args_out = mod_args->get();
3897 } else {
3898 *args_out = (JavaVMInitArgs *)args_in; // no changes so use args_in
3899 }
3900 return JNI_OK;
3901 }
3902
3903 jint Arguments::match_special_option_and_act(const JavaVMInitArgs* args,
3904 ScopedVMInitArgs* args_out) {
3905 // Remaining part of option string
3906 const char* tail;
3907 ScopedVMInitArgs vm_options_file_args(args_out->container_name());
3908
3909 for (int index = 0; index < args->nOptions; index++) {
3910 const JavaVMOption* option = args->options + index;
3911 if (ArgumentsExt::process_options(option)) {
3912 continue;
3913 }
3914 if (match_option(option, "-XX:Flags=", &tail)) {
3915 Arguments::set_jvm_flags_file(tail);
3916 continue;
3917 }
3918 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
3919 if (vm_options_file_args.found_vm_options_file_arg()) {
3920 jio_fprintf(defaultStream::error_stream(),
3921 "The option '%s' is already specified in the options "
3922 "container '%s' so the specification of '%s' in the "
3923 "same options container is an error.\n",
3924 vm_options_file_args.vm_options_file_arg(),
3925 vm_options_file_args.container_name(),
3926 option->optionString);
3927 return JNI_EINVAL;
3928 }
3929 vm_options_file_args.set_vm_options_file_arg(option->optionString);
3930 // If there's a VMOptionsFile, parse that
3931 jint code = insert_vm_options_file(args, tail, index,
3932 &vm_options_file_args, args_out);
3933 if (code != JNI_OK) {
3934 return code;
3935 }
3936 args_out->set_vm_options_file_arg(vm_options_file_args.vm_options_file_arg());
3937 if (args_out->is_set()) {
3938 // The VMOptions file inserted some options so switch 'args'
3939 // to the new set of options, and continue processing which
3940 // preserves "last option wins" semantics.
3941 args = args_out->get();
3942 // The first option from the VMOptionsFile replaces the
3943 // current option. So we back track to process the
3944 // replacement option.
3945 index--;
3946 }
3947 continue;
3948 }
3949 if (match_option(option, "-XX:+PrintVMOptions")) {
3950 PrintVMOptions = true;
3951 continue;
3952 }
3953 if (match_option(option, "-XX:-PrintVMOptions")) {
3954 PrintVMOptions = false;
3955 continue;
3956 }
3957 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) {
3958 IgnoreUnrecognizedVMOptions = true;
3959 continue;
3960 }
3961 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) {
3962 IgnoreUnrecognizedVMOptions = false;
3963 continue;
3964 }
3965 if (match_option(option, "-XX:+PrintFlagsInitial")) {
3966 CommandLineFlags::printFlags(tty, false);
3967 vm_exit(0);
3968 }
3969 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) {
3970 #if INCLUDE_NMT
3971 // The launcher did not setup nmt environment variable properly.
3972 if (!MemTracker::check_launcher_nmt_support(tail)) {
3973 warning("Native Memory Tracking did not setup properly, using wrong launcher?");
3974 }
3975
3976 // Verify if nmt option is valid.
3977 if (MemTracker::verify_nmt_option()) {
3978 // Late initialization, still in single-threaded mode.
3979 if (MemTracker::tracking_level() >= NMT_summary) {
3980 MemTracker::init();
3981 }
3982 } else {
3983 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL);
3984 }
3985 continue;
3986 #else
3987 jio_fprintf(defaultStream::error_stream(),
3988 "Native Memory Tracking is not supported in this VM\n");
3989 return JNI_ERR;
3990 #endif
3991 }
3992
3993 #ifndef PRODUCT
3994 if (match_option(option, "-XX:+PrintFlagsWithComments")) {
3995 CommandLineFlags::printFlags(tty, true);
3996 vm_exit(0);
3997 }
3998 #endif
3999
4000 if (match_option(option, "-XX:+UseAppCDS")) {
4001 Flag* flag = Flag::find_flag("SharedArchiveFile", 17, true, true);
4002 if (flag->is_diagnostic()) {
4003 flag->clear_diagnostic();
4004 }
4005 continue;
4006 }
4007 }
4008 return JNI_OK;
4009 }
4010
4011 static void print_options(const JavaVMInitArgs *args) {
4012 const char* tail;
4013 for (int index = 0; index < args->nOptions; index++) {
4014 const JavaVMOption *option = args->options + index;
4015 if (match_option(option, "-XX:", &tail)) {
4016 logOption(tail);
4017 }
4018 }
4019 }
4020
4021 bool Arguments::handle_deprecated_print_gc_flags() {
4022 if (PrintGC) {
4023 log_warning(gc)("-XX:+PrintGC is deprecated. Will use -Xlog:gc instead.");
4024 }
4025 if (PrintGCDetails) {
4026 log_warning(gc)("-XX:+PrintGCDetails is deprecated. Will use -Xlog:gc* instead.");
4027 }
4028
4029 if (_gc_log_filename != NULL) {
4030 // -Xloggc was used to specify a filename
4031 const char* gc_conf = PrintGCDetails ? "gc*" : "gc";
4032
4033 LogTarget(Error, logging) target;
4034 LogStream errstream(target);
4035 return LogConfiguration::parse_log_arguments(_gc_log_filename, gc_conf, NULL, NULL, &errstream);
4036 } else if (PrintGC || PrintGCDetails) {
4037 LogConfiguration::configure_stdout(LogLevel::Info, !PrintGCDetails, LOG_TAGS(gc));
4038 }
4039 return true;
4040 }
4041
4042 void Arguments::handle_extra_cms_flags(const char* msg) {
4043 SpecialFlag flag;
4044 const char *flag_name = "UseConcMarkSweepGC";
4045 if (lookup_special_flag(flag_name, flag)) {
4046 handle_aliases_and_deprecation(flag_name, /* print warning */ true);
4047 warning("%s", msg);
4048 }
4049 }
4050
4051 // Parse entry point called from JNI_CreateJavaVM
4052
4053 jint Arguments::parse(const JavaVMInitArgs* initial_cmd_args) {
4054 assert(verify_special_jvm_flags(), "deprecated and obsolete flag table inconsistent");
4055
4056 // Initialize ranges, constraints and writeables
4057 CommandLineFlagRangeList::init();
4058 CommandLineFlagConstraintList::init();
4059 CommandLineFlagWriteableList::init();
4060
4061 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed.
4062 const char* hotspotrc = ".hotspotrc";
4063 bool settings_file_specified = false;
4064 bool needs_hotspotrc_warning = false;
4065 ScopedVMInitArgs initial_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
4066 ScopedVMInitArgs initial_java_options_args("env_var='_JAVA_OPTIONS'");
4067
4068 // Pointers to current working set of containers
4069 JavaVMInitArgs* cur_cmd_args;
4070 JavaVMInitArgs* cur_java_options_args;
4071 JavaVMInitArgs* cur_java_tool_options_args;
4072
4073 // Containers for modified/expanded options
4074 ScopedVMInitArgs mod_cmd_args("cmd_line_args");
4075 ScopedVMInitArgs mod_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
4076 ScopedVMInitArgs mod_java_options_args("env_var='_JAVA_OPTIONS'");
4077
4078
4079 jint code =
4080 parse_java_tool_options_environment_variable(&initial_java_tool_options_args);
4081 if (code != JNI_OK) {
4082 return code;
4083 }
4084
4085 code = parse_java_options_environment_variable(&initial_java_options_args);
4086 if (code != JNI_OK) {
4087 return code;
4088 }
4089
4090 code = expand_vm_options_as_needed(initial_java_tool_options_args.get(),
4091 &mod_java_tool_options_args,
4092 &cur_java_tool_options_args);
4093 if (code != JNI_OK) {
4094 return code;
4095 }
4096
4097 code = expand_vm_options_as_needed(initial_cmd_args,
4098 &mod_cmd_args,
4099 &cur_cmd_args);
4100 if (code != JNI_OK) {
4101 return code;
4102 }
4103
4104 code = expand_vm_options_as_needed(initial_java_options_args.get(),
4105 &mod_java_options_args,
4106 &cur_java_options_args);
4107 if (code != JNI_OK) {
4108 return code;
4109 }
4110
4111 const char* flags_file = Arguments::get_jvm_flags_file();
4112 settings_file_specified = (flags_file != NULL);
4113
4114 if (IgnoreUnrecognizedVMOptions) {
4115 cur_cmd_args->ignoreUnrecognized = true;
4116 cur_java_tool_options_args->ignoreUnrecognized = true;
4117 cur_java_options_args->ignoreUnrecognized = true;
4118 }
4119
4120 // Parse specified settings file
4121 if (settings_file_specified) {
4122 if (!process_settings_file(flags_file, true,
4123 cur_cmd_args->ignoreUnrecognized)) {
4124 return JNI_EINVAL;
4125 }
4126 } else {
4127 #ifdef ASSERT
4128 // Parse default .hotspotrc settings file
4129 if (!process_settings_file(".hotspotrc", false,
4130 cur_cmd_args->ignoreUnrecognized)) {
4131 return JNI_EINVAL;
4132 }
4133 #else
4134 struct stat buf;
4135 if (os::stat(hotspotrc, &buf) == 0) {
4136 needs_hotspotrc_warning = true;
4137 }
4138 #endif
4139 }
4140
4141 if (PrintVMOptions) {
4142 print_options(cur_java_tool_options_args);
4143 print_options(cur_cmd_args);
4144 print_options(cur_java_options_args);
4145 }
4146
4147 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS
4148 jint result = parse_vm_init_args(cur_java_tool_options_args,
4149 cur_java_options_args,
4150 cur_cmd_args);
4151
4152 if (result != JNI_OK) {
4153 return result;
4154 }
4155
4156 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed.
4157 SharedArchivePath = get_shared_archive_path();
4158 if (SharedArchivePath == NULL) {
4159 return JNI_ENOMEM;
4160 }
4161
4162 // Set up VerifySharedSpaces
4163 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) {
4164 VerifySharedSpaces = true;
4165 }
4166
4167 // Delay warning until here so that we've had a chance to process
4168 // the -XX:-PrintWarnings flag
4169 if (needs_hotspotrc_warning) {
4170 warning("%s file is present but has been ignored. "
4171 "Run with -XX:Flags=%s to load the file.",
4172 hotspotrc, hotspotrc);
4173 }
4174
4175 if (needs_module_property_warning) {
4176 warning("Ignoring system property options whose names match the '-Djdk.module.*'."
4177 " names that are reserved for internal use.");
4178 }
4179
4180 #if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
4181 UNSUPPORTED_OPTION(UseLargePages);
4182 #endif
4183
4184 ArgumentsExt::report_unsupported_options();
4185
4186 #ifndef PRODUCT
4187 if (TraceBytecodesAt != 0) {
4188 TraceBytecodes = true;
4189 }
4190 if (CountCompiledCalls) {
4191 if (UseCounterDecay) {
4192 warning("UseCounterDecay disabled because CountCalls is set");
4193 UseCounterDecay = false;
4194 }
4195 }
4196 #endif // PRODUCT
4197
4198 if (ScavengeRootsInCode == 0) {
4199 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) {
4200 warning("Forcing ScavengeRootsInCode non-zero");
4201 }
4202 ScavengeRootsInCode = 1;
4203 }
4204
4205 if (!handle_deprecated_print_gc_flags()) {
4206 return JNI_EINVAL;
4207 }
4208
4209 // Set object alignment values.
4210 set_object_alignment();
4211
4212 #if !INCLUDE_CDS
4213 if (DumpSharedSpaces || RequireSharedSpaces) {
4214 jio_fprintf(defaultStream::error_stream(),
4215 "Shared spaces are not supported in this VM\n");
4216 return JNI_ERR;
4217 }
4218 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) ||
4219 log_is_enabled(Info, cds)) {
4220 warning("Shared spaces are not supported in this VM");
4221 FLAG_SET_DEFAULT(UseSharedSpaces, false);
4222 LogConfiguration::configure_stdout(LogLevel::Off, true, LOG_TAGS(cds));
4223 }
4224 no_shared_spaces("CDS Disabled");
4225 #endif // INCLUDE_CDS
4226
4227 return JNI_OK;
4228 }
4229
4230 jint Arguments::apply_ergo() {
4231 // Set flags based on ergonomics.
4232 jint result = set_ergonomics_flags();
4233 if (result != JNI_OK) return result;
4234
4235 #if INCLUDE_JVMCI
4236 set_jvmci_specific_flags();
4237 #endif
4238
4239 set_shared_spaces_flags();
4240
4241 // Check the GC selections again.
4242 if (!check_gc_consistency()) {
4243 return JNI_EINVAL;
4244 }
4245
4246 if (TieredCompilation) {
4247 set_tiered_flags();
4248 } else {
4249 int max_compilation_policy_choice = 1;
4250 #ifdef COMPILER2
4251 if (is_server_compilation_mode_vm()) {
4252 max_compilation_policy_choice = 2;
4253 }
4254 #endif
4255 // Check if the policy is valid.
4256 if (CompilationPolicyChoice >= max_compilation_policy_choice) {
4257 vm_exit_during_initialization(
4258 "Incompatible compilation policy selected", NULL);
4259 }
4260 // Scale CompileThreshold
4261 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves CompileThreshold unchanged.
4262 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
4263 FLAG_SET_ERGO(intx, CompileThreshold, scaled_compile_threshold(CompileThreshold));
4264 }
4265 }
4266
4267 #ifdef COMPILER2
4268 #ifndef PRODUCT
4269 if (PrintIdealGraphLevel > 0) {
4270 FLAG_SET_ERGO(bool, PrintIdealGraph, true);
4271 }
4272 #endif
4273 #endif
4274
4275 // Set heap size based on available physical memory
4276 set_heap_size();
4277
4278 ArgumentsExt::set_gc_specific_flags();
4279
4280 // Initialize Metaspace flags and alignments
4281 Metaspace::ergo_initialize();
4282
4283 // Set bytecode rewriting flags
4284 set_bytecode_flags();
4285
4286 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled
4287 jint code = set_aggressive_opts_flags();
4288 if (code != JNI_OK) {
4289 return code;
4290 }
4291
4292 // Turn off biased locking for locking debug mode flags,
4293 // which are subtly different from each other but neither works with
4294 // biased locking
4295 if (UseHeavyMonitors
4296 #ifdef COMPILER1
4297 || !UseFastLocking
4298 #endif // COMPILER1
4299 #if INCLUDE_JVMCI
4300 || !JVMCIUseFastLocking
4301 #endif
4302 ) {
4303 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) {
4304 // flag set to true on command line; warn the user that they
4305 // can't enable biased locking here
4306 warning("Biased Locking is not supported with locking debug flags"
4307 "; ignoring UseBiasedLocking flag." );
4308 }
4309 UseBiasedLocking = false;
4310 }
4311
4312 #ifdef CC_INTERP
4313 // Clear flags not supported on zero.
4314 FLAG_SET_DEFAULT(ProfileInterpreter, false);
4315 FLAG_SET_DEFAULT(UseBiasedLocking, false);
4316 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false));
4317 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false));
4318 #endif // CC_INTERP
4319
4320 #ifdef COMPILER2
4321 if (!EliminateLocks) {
4322 EliminateNestedLocks = false;
4323 }
4324 if (!Inline) {
4325 IncrementalInline = false;
4326 }
4327 #ifndef PRODUCT
4328 if (!IncrementalInline) {
4329 AlwaysIncrementalInline = false;
4330 }
4331 #endif
4332 if (!UseTypeSpeculation && FLAG_IS_DEFAULT(TypeProfileLevel)) {
4333 // nothing to use the profiling, turn if off
4334 FLAG_SET_DEFAULT(TypeProfileLevel, 0);
4335 }
4336 #endif
4337
4338 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) {
4339 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output");
4340 DebugNonSafepoints = true;
4341 }
4342
4343 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) {
4344 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used");
4345 }
4346
4347 if (UseOnStackReplacement && !UseLoopCounter) {
4348 warning("On-stack-replacement requires loop counters; enabling loop counters");
4349 FLAG_SET_DEFAULT(UseLoopCounter, true);
4350 }
4351
4352 #ifndef PRODUCT
4353 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) {
4354 if (use_vm_log()) {
4355 LogVMOutput = true;
4356 }
4357 }
4358 #endif // PRODUCT
4359
4360 if (PrintCommandLineFlags) {
4361 CommandLineFlags::printSetFlags(tty);
4362 }
4363
4364 // Apply CPU specific policy for the BiasedLocking
4365 if (UseBiasedLocking) {
4366 if (!VM_Version::use_biased_locking() &&
4367 !(FLAG_IS_CMDLINE(UseBiasedLocking))) {
4368 UseBiasedLocking = false;
4369 }
4370 }
4371 #ifdef COMPILER2
4372 if (!UseBiasedLocking || EmitSync != 0) {
4373 UseOptoBiasInlining = false;
4374 }
4375 #endif
4376
4377 // ThreadLocalHandshakesConstraintFunc handles the constraints.
4378 if (FLAG_IS_DEFAULT(ThreadLocalHandshakes) || !SafepointMechanism::supports_thread_local_poll()) {
4379 log_debug(ergo)("ThreadLocalHandshakes %s", ThreadLocalHandshakes ? "enabled." : "disabled.");
4380 } else {
4381 log_info(ergo)("ThreadLocalHandshakes %s", ThreadLocalHandshakes ? "enabled." : "disabled.");
4382 }
4383
4384 return JNI_OK;
4385 }
4386
4387 jint Arguments::adjust_after_os() {
4388 if (UseNUMA) {
4389 if (!FLAG_IS_DEFAULT(AllocateHeapAt)) {
4390 FLAG_SET_ERGO(bool, UseNUMA, false);
4391 } else if (UseParallelGC || UseParallelOldGC) {
4392 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) {
4393 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M);
4394 }
4395 }
4396 // UseNUMAInterleaving is set to ON for all collectors and
4397 // platforms when UseNUMA is set to ON. NUMA-aware collectors
4398 // such as the parallel collector for Linux and Solaris will
4399 // interleave old gen and survivor spaces on top of NUMA
4400 // allocation policy for the eden space.
4401 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on
4402 // all platforms and ParallelGC on Windows will interleave all
4403 // of the heap spaces across NUMA nodes.
4404 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) {
4405 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true);
4406 }
4407 }
4408 return JNI_OK;
4409 }
4410
4411 int Arguments::PropertyList_count(SystemProperty* pl) {
4412 int count = 0;
4413 while(pl != NULL) {
4414 count++;
4415 pl = pl->next();
4416 }
4417 return count;
4418 }
4419
4420 // Return the number of readable properties.
4421 int Arguments::PropertyList_readable_count(SystemProperty* pl) {
4422 int count = 0;
4423 while(pl != NULL) {
4424 if (pl->is_readable()) {
4425 count++;
4426 }
4427 pl = pl->next();
4428 }
4429 return count;
4430 }
4431
4432 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) {
4433 assert(key != NULL, "just checking");
4434 SystemProperty* prop;
4435 for (prop = pl; prop != NULL; prop = prop->next()) {
4436 if (strcmp(key, prop->key()) == 0) return prop->value();
4437 }
4438 return NULL;
4439 }
4440
4441 // Return the value of the requested property provided that it is a readable property.
4442 const char* Arguments::PropertyList_get_readable_value(SystemProperty *pl, const char* key) {
4443 assert(key != NULL, "just checking");
4444 SystemProperty* prop;
4445 // Return the property value if the keys match and the property is not internal or
4446 // it's the special internal property "jdk.boot.class.path.append".
4447 for (prop = pl; prop != NULL; prop = prop->next()) {
4448 if (strcmp(key, prop->key()) == 0) {
4449 if (!prop->internal()) {
4450 return prop->value();
4451 } else if (strcmp(key, "jdk.boot.class.path.append") == 0) {
4452 return prop->value();
4453 } else {
4454 // Property is internal and not jdk.boot.class.path.append so return NULL.
4455 return NULL;
4456 }
4457 }
4458 }
4459 return NULL;
4460 }
4461
4462 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) {
4463 int count = 0;
4464 const char* ret_val = NULL;
4465
4466 while(pl != NULL) {
4467 if(count >= index) {
4468 ret_val = pl->key();
4469 break;
4470 }
4471 count++;
4472 pl = pl->next();
4473 }
4474
4475 return ret_val;
4476 }
4477
4478 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) {
4479 int count = 0;
4480 char* ret_val = NULL;
4481
4482 while(pl != NULL) {
4483 if(count >= index) {
4484 ret_val = pl->value();
4485 break;
4486 }
4487 count++;
4488 pl = pl->next();
4489 }
4490
4491 return ret_val;
4492 }
4493
4494 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) {
4495 SystemProperty* p = *plist;
4496 if (p == NULL) {
4497 *plist = new_p;
4498 } else {
4499 while (p->next() != NULL) {
4500 p = p->next();
4501 }
4502 p->set_next(new_p);
4503 }
4504 }
4505
4506 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v,
4507 bool writeable, bool internal) {
4508 if (plist == NULL)
4509 return;
4510
4511 SystemProperty* new_p = new SystemProperty(k, v, writeable, internal);
4512 PropertyList_add(plist, new_p);
4513 }
4514
4515 void Arguments::PropertyList_add(SystemProperty *element) {
4516 PropertyList_add(&_system_properties, element);
4517 }
4518
4519 // This add maintains unique property key in the list.
4520 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v,
4521 PropertyAppendable append, PropertyWriteable writeable,
4522 PropertyInternal internal) {
4523 if (plist == NULL)
4524 return;
4525
4526 // If property key exist then update with new value.
4527 SystemProperty* prop;
4528 for (prop = *plist; prop != NULL; prop = prop->next()) {
4529 if (strcmp(k, prop->key()) == 0) {
4530 if (append == AppendProperty) {
4531 prop->append_value(v);
4532 } else {
4533 prop->set_value(v);
4534 }
4535 return;
4536 }
4537 }
4538
4539 PropertyList_add(plist, k, v, writeable == WriteableProperty, internal == InternalProperty);
4540 }
4541
4542 // Copies src into buf, replacing "%%" with "%" and "%p" with pid
4543 // Returns true if all of the source pointed by src has been copied over to
4544 // the destination buffer pointed by buf. Otherwise, returns false.
4545 // Notes:
4546 // 1. If the length (buflen) of the destination buffer excluding the
4547 // NULL terminator character is not long enough for holding the expanded
4548 // pid characters, it also returns false instead of returning the partially
4549 // expanded one.
4550 // 2. The passed in "buflen" should be large enough to hold the null terminator.
4551 bool Arguments::copy_expand_pid(const char* src, size_t srclen,
4552 char* buf, size_t buflen) {
4553 const char* p = src;
4554 char* b = buf;
4555 const char* src_end = &src[srclen];
4556 char* buf_end = &buf[buflen - 1];
4557
4558 while (p < src_end && b < buf_end) {
4559 if (*p == '%') {
4560 switch (*(++p)) {
4561 case '%': // "%%" ==> "%"
4562 *b++ = *p++;
4563 break;
4564 case 'p': { // "%p" ==> current process id
4565 // buf_end points to the character before the last character so
4566 // that we could write '\0' to the end of the buffer.
4567 size_t buf_sz = buf_end - b + 1;
4568 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id());
4569
4570 // if jio_snprintf fails or the buffer is not long enough to hold
4571 // the expanded pid, returns false.
4572 if (ret < 0 || ret >= (int)buf_sz) {
4573 return false;
4574 } else {
4575 b += ret;
4576 assert(*b == '\0', "fail in copy_expand_pid");
4577 if (p == src_end && b == buf_end + 1) {
4578 // reach the end of the buffer.
4579 return true;
4580 }
4581 }
4582 p++;
4583 break;
4584 }
4585 default :
4586 *b++ = '%';
4587 }
4588 } else {
4589 *b++ = *p++;
4590 }
4591 }
4592 *b = '\0';
4593 return (p == src_end); // return false if not all of the source was copied
4594 }