1 /*
2 * Copyright (c) 1997, 2016, 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 "classfile/classLoader.hpp"
27 #include "classfile/javaAssertions.hpp"
28 #include "classfile/stringTable.hpp"
29 #include "classfile/symbolTable.hpp"
30 #include "code/codeCacheExtensions.hpp"
31 #include "gc/shared/cardTableRS.hpp"
32 #include "gc/shared/genCollectedHeap.hpp"
33 #include "gc/shared/referenceProcessor.hpp"
34 #include "gc/shared/taskqueue.hpp"
35 #include "logging/log.hpp"
36 #include "logging/logTag.hpp"
37 #include "logging/logConfiguration.hpp"
38 #include "memory/allocation.inline.hpp"
39 #include "memory/universe.inline.hpp"
40 #include "oops/oop.inline.hpp"
41 #include "prims/jvmtiExport.hpp"
42 #include "runtime/arguments.hpp"
43 #include "runtime/arguments_ext.hpp"
44 #include "runtime/commandLineFlagConstraintList.hpp"
45 #include "runtime/commandLineFlagRangeList.hpp"
46 #include "runtime/globals.hpp"
47 #include "runtime/globals_extension.hpp"
48 #include "runtime/java.hpp"
49 #include "runtime/os.hpp"
50 #include "runtime/vm_version.hpp"
51 #include "services/management.hpp"
52 #include "services/memTracker.hpp"
53 #include "utilities/defaultStream.hpp"
54 #include "utilities/macros.hpp"
55 #include "utilities/stringUtils.hpp"
56 #if INCLUDE_JVMCI
57 #include "jvmci/jvmciRuntime.hpp"
58 #endif
59 #if INCLUDE_ALL_GCS
60 #include "gc/cms/compactibleFreeListSpace.hpp"
61 #include "gc/g1/g1CollectedHeap.inline.hpp"
62 #include "gc/parallel/parallelScavengeHeap.hpp"
63 #endif // INCLUDE_ALL_GCS
64
65 // Note: This is a special bug reporting site for the JVM
66 #define DEFAULT_VENDOR_URL_BUG "http://bugreport.java.com/bugreport/crash.jsp"
67 #define DEFAULT_JAVA_LAUNCHER "generic"
68
69 #define UNSUPPORTED_GC_OPTION(gc) \
70 do { \
71 if (gc) { \
72 if (FLAG_IS_CMDLINE(gc)) { \
73 warning(#gc " is not supported in this VM. Using Serial GC."); \
74 } \
75 FLAG_SET_DEFAULT(gc, false); \
76 } \
77 } while(0)
78
79 char* Arguments::_jvm_flags_file = NULL;
80 char** Arguments::_jvm_flags_array = NULL;
81 int Arguments::_num_jvm_flags = 0;
82 char** Arguments::_jvm_args_array = NULL;
83 int Arguments::_num_jvm_args = 0;
84 char* Arguments::_java_command = NULL;
85 SystemProperty* Arguments::_system_properties = NULL;
86 const char* Arguments::_gc_log_filename = NULL;
87 bool Arguments::_has_profile = false;
88 size_t Arguments::_conservative_max_heap_alignment = 0;
89 size_t Arguments::_min_heap_size = 0;
90 Arguments::Mode Arguments::_mode = _mixed;
91 bool Arguments::_java_compiler = false;
92 bool Arguments::_xdebug_mode = false;
93 const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG;
94 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER;
95 int Arguments::_sun_java_launcher_pid = -1;
96 bool Arguments::_sun_java_launcher_is_altjvm = false;
97
98 // These parameters are reset in method parse_vm_init_args()
99 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
100 bool Arguments::_UseOnStackReplacement = UseOnStackReplacement;
101 bool Arguments::_BackgroundCompilation = BackgroundCompilation;
102 bool Arguments::_ClipInlining = ClipInlining;
103 intx Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
104 intx Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
105
106 char* Arguments::SharedArchivePath = NULL;
107
108 AgentLibraryList Arguments::_libraryList;
109 AgentLibraryList Arguments::_agentList;
110
111 abort_hook_t Arguments::_abort_hook = NULL;
112 exit_hook_t Arguments::_exit_hook = NULL;
113 vfprintf_hook_t Arguments::_vfprintf_hook = NULL;
114
115
116 SystemProperty *Arguments::_sun_boot_library_path = NULL;
117 SystemProperty *Arguments::_java_library_path = NULL;
118 SystemProperty *Arguments::_java_home = NULL;
119 SystemProperty *Arguments::_java_class_path = NULL;
120 SystemProperty *Arguments::_sun_boot_class_path = NULL;
121
122 char* Arguments::_ext_dirs = NULL;
123
124 // Check if head of 'option' matches 'name', and sets 'tail' to the remaining
125 // part of the option string.
126 static bool match_option(const JavaVMOption *option, const char* name,
127 const char** tail) {
128 size_t len = strlen(name);
129 if (strncmp(option->optionString, name, len) == 0) {
130 *tail = option->optionString + len;
131 return true;
132 } else {
133 return false;
134 }
135 }
136
137 // Check if 'option' matches 'name'. No "tail" is allowed.
138 static bool match_option(const JavaVMOption *option, const char* name) {
139 const char* tail = NULL;
140 bool result = match_option(option, name, &tail);
141 if (tail != NULL && *tail == '\0') {
142 return result;
143 } else {
144 return false;
145 }
146 }
147
148 // Return true if any of the strings in null-terminated array 'names' matches.
149 // If tail_allowed is true, then the tail must begin with a colon; otherwise,
150 // the option must match exactly.
151 static bool match_option(const JavaVMOption* option, const char** names, const char** tail,
152 bool tail_allowed) {
153 for (/* empty */; *names != NULL; ++names) {
154 if (match_option(option, *names, tail)) {
155 if (**tail == '\0' || tail_allowed && **tail == ':') {
156 return true;
157 }
158 }
159 }
160 return false;
161 }
162
163 static void logOption(const char* opt) {
164 if (PrintVMOptions) {
165 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt);
166 }
167 }
168
169 // Process java launcher properties.
170 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) {
171 // See if sun.java.launcher, sun.java.launcher.is_altjvm or
172 // sun.java.launcher.pid is defined.
173 // Must do this before setting up other system properties,
174 // as some of them may depend on launcher type.
175 for (int index = 0; index < args->nOptions; index++) {
176 const JavaVMOption* option = args->options + index;
177 const char* tail;
178
179 if (match_option(option, "-Dsun.java.launcher=", &tail)) {
180 process_java_launcher_argument(tail, option->extraInfo);
181 continue;
182 }
183 if (match_option(option, "-Dsun.java.launcher.is_altjvm=", &tail)) {
184 if (strcmp(tail, "true") == 0) {
185 _sun_java_launcher_is_altjvm = true;
186 }
187 continue;
188 }
189 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) {
190 _sun_java_launcher_pid = atoi(tail);
191 continue;
192 }
193 }
194 }
195
196 // Initialize system properties key and value.
197 void Arguments::init_system_properties() {
198 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name",
199 "Java Virtual Machine Specification", false));
200 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false));
201 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false));
202 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true));
203 PropertyList_add(&_system_properties, new SystemProperty("jdk.debug", VM_Version::jdk_debug_level(), false));
204
205 // Following are JVMTI agent writable properties.
206 // Properties values are set to NULL and they are
207 // os specific they are initialized in os::init_system_properties_values().
208 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true);
209 _java_library_path = new SystemProperty("java.library.path", NULL, true);
210 _java_home = new SystemProperty("java.home", NULL, true);
211 _sun_boot_class_path = new SystemProperty("sun.boot.class.path", NULL, true);
212
213 _java_class_path = new SystemProperty("java.class.path", "", true);
214
215 // Add to System Property list.
216 PropertyList_add(&_system_properties, _sun_boot_library_path);
217 PropertyList_add(&_system_properties, _java_library_path);
218 PropertyList_add(&_system_properties, _java_home);
219 PropertyList_add(&_system_properties, _java_class_path);
220 PropertyList_add(&_system_properties, _sun_boot_class_path);
221
222 // Set OS specific system properties values
223 os::init_system_properties_values();
224
225 JVMCI_ONLY(JVMCIRuntime::init_system_properties(&_system_properties);)
226 }
227
228 // Update/Initialize System properties after JDK version number is known
229 void Arguments::init_version_specific_system_properties() {
230 enum { bufsz = 16 };
231 char buffer[bufsz];
232 const char* spec_vendor = "Oracle Corporation";
233 uint32_t spec_version = JDK_Version::current().major_version();
234
235 jio_snprintf(buffer, bufsz, UINT32_FORMAT, spec_version);
236
237 PropertyList_add(&_system_properties,
238 new SystemProperty("java.vm.specification.vendor", spec_vendor, false));
239 PropertyList_add(&_system_properties,
240 new SystemProperty("java.vm.specification.version", buffer, false));
241 PropertyList_add(&_system_properties,
242 new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false));
243 }
244
245 /*
246 * -XX argument processing:
247 *
248 * -XX arguments are defined in several places, such as:
249 * globals.hpp, globals_<cpu>.hpp, globals_<os>.hpp, <compiler>_globals.hpp, or <gc>_globals.hpp.
250 * -XX arguments are parsed in parse_argument().
251 * -XX argument bounds checking is done in check_vm_args_consistency().
252 *
253 * Over time -XX arguments may change. There are mechanisms to handle common cases:
254 *
255 * ALIASED: An option that is simply another name for another option. This is often
256 * part of the process of deprecating a flag, but not all aliases need
257 * to be deprecated.
258 *
259 * Create an alias for an option by adding the old and new option names to the
260 * "aliased_jvm_flags" table. Delete the old variable from globals.hpp (etc).
261 *
262 * DEPRECATED: An option that is supported, but a warning is printed to let the user know that
263 * support may be removed in the future. Both regular and aliased options may be
264 * deprecated.
265 *
266 * Add a deprecation warning for an option (or alias) by adding an entry in the
267 * "special_jvm_flags" table and setting the "deprecated_in" field.
268 * Often an option "deprecated" in one major release will
269 * be made "obsolete" in the next. In this case the entry should also have it's
270 * "obsolete_in" field set.
271 *
272 * OBSOLETE: An option that has been removed (and deleted from globals.hpp), but is still accepted
273 * on the command line. A warning is printed to let the user know that option might not
274 * be accepted in the future.
275 *
276 * Add an obsolete warning for an option by adding an entry in the "special_jvm_flags"
277 * table and setting the "obsolete_in" field.
278 *
279 * EXPIRED: A deprecated or obsolete option that has an "accept_until" version less than or equal
280 * to the current JDK version. The system will flatly refuse to admit the existence of
281 * the flag. This allows a flag to die automatically over JDK releases.
282 *
283 * Note that manual cleanup of expired options should be done at major JDK version upgrades:
284 * - Newly expired options should be removed from the special_jvm_flags and aliased_jvm_flags tables.
285 * - Newly obsolete or expired deprecated options should have their global variable
286 * definitions removed (from globals.hpp, etc) and related implementations removed.
287 *
288 * Recommended approach for removing options:
289 *
290 * To remove options commonly used by customers (e.g. product, commercial -XX options), use
291 * the 3-step model adding major release numbers to the deprecate, obsolete and expire columns.
292 *
293 * To remove internal options (e.g. diagnostic, experimental, develop options), use
294 * a 2-step model adding major release numbers to the obsolete and expire columns.
295 *
296 * To change the name of an option, use the alias table as well as a 2-step
297 * model adding major release numbers to the deprecate and expire columns.
298 * Think twice about aliasing commonly used customer options.
299 *
300 * There are times when it is appropriate to leave a future release number as undefined.
301 *
302 * Tests: Aliases should be tested in VMAliasOptions.java.
303 * Deprecated options should be tested in VMDeprecatedOptions.java.
304 */
305
306 // Obsolete or deprecated -XX flag.
307 typedef struct {
308 const char* name;
309 JDK_Version deprecated_in; // When the deprecation warning started (or "undefined").
310 JDK_Version obsolete_in; // When the obsolete warning started (or "undefined").
311 JDK_Version expired_in; // When the option expires (or "undefined").
312 } SpecialFlag;
313
314 // The special_jvm_flags table declares options that are being deprecated and/or obsoleted. The
315 // "deprecated_in" or "obsolete_in" fields may be set to "undefined", but not both.
316 // When the JDK version reaches 'deprecated_in' limit, the JVM will process this flag on
317 // the command-line as usual, but will issue a warning.
318 // When the JDK version reaches 'obsolete_in' limit, the JVM will continue accepting this flag on
319 // the command-line, while issuing a warning and ignoring the flag value.
320 // Once the JDK version reaches 'expired_in' limit, the JVM will flatly refuse to admit the
321 // existence of the flag.
322 //
323 // MANUAL CLEANUP ON JDK VERSION UPDATES:
324 // This table ensures that the handling of options will update automatically when the JDK
325 // version is incremented, but the source code needs to be cleanup up manually:
326 // - As "deprecated" options age into "obsolete" or "expired" options, the associated "globals"
327 // variable should be removed, as well as users of the variable.
328 // - As "deprecated" options age into "obsolete" options, move the entry into the
329 // "Obsolete Flags" section of the table.
330 // - All expired options should be removed from the table.
331 static SpecialFlag const special_jvm_flags[] = {
332 // -------------- Deprecated Flags --------------
333 // --- Non-alias flags - sorted by obsolete_in then expired_in:
334 { "MaxGCMinorPauseMillis", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() },
335 { "UseParNewGC", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) },
336 { "ConvertSleepToYield", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) },
337 { "ConvertYieldToSleep", JDK_Version::jdk(9), JDK_Version::jdk(10), JDK_Version::jdk(11) },
338
339 // --- Deprecated alias flags (see also aliased_jvm_flags) - sorted by obsolete_in then expired_in:
340 { "DefaultMaxRAMFraction", JDK_Version::jdk(8), JDK_Version::undefined(), JDK_Version::undefined() },
341 { "CreateMinidumpOnCrash", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
342 { "CMSMarkStackSizeMax", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) },
343 { "CMSMarkStackSize", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) },
344 { "G1MarkStackSize", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) },
345 { "ParallelMarkingThreads", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) },
346 { "ParallelCMSThreads", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(10) },
347
348 // -------------- Obsolete Flags - sorted by expired_in --------------
349 { "UseOldInlining", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
350 { "SafepointPollOffset", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
351 { "UseBoundThreads", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
352 { "DefaultThreadPriority", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
353 { "NoYieldsInMicrolock", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
354 { "BackEdgeThreshold", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
355 { "UseNewReflection", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
356 { "ReflectionWrapResolutionErrors",JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
357 { "VerifyReflectionBytecodes", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
358 { "AutoShutdownNMT", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
359 { "NmethodSweepFraction", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
360 { "NmethodSweepCheckInterval", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
361 { "CodeCacheMinimumFreeSpace", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
362 #ifndef ZERO
363 { "UseFastAccessorMethods", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
364 { "UseFastEmptyMethods", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
365 #endif // ZERO
366 { "UseCompilerSafepoints", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
367 { "AdaptiveSizePausePolicy", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
368 { "ParallelGCRetainPLAB", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
369 { "ThreadSafetyMargin", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
370 { "LazyBootClassLoader", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
371 { "StarvationMonitorInterval", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
372 { "PreInflateSpin", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
373 { "JNIDetachReleasesMonitors", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
374 { "UseAltSigs", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
375
376 #ifdef TEST_VERIFY_SPECIAL_JVM_FLAGS
377 { "dep > obs", JDK_Version::jdk(9), JDK_Version::jdk(8), JDK_Version::undefined() },
378 { "dep > exp ", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(8) },
379 { "obs > exp ", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(8) },
380 { "not deprecated or obsolete", JDK_Version::undefined(), JDK_Version::undefined(), JDK_Version::jdk(9) },
381 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
382 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
383 { "BytecodeVerificationRemote", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::undefined() },
384 #endif
385
386 { NULL, JDK_Version(0), JDK_Version(0) }
387 };
388
389 // Flags that are aliases for other flags.
390 typedef struct {
391 const char* alias_name;
392 const char* real_name;
393 } AliasedFlag;
394
395 static AliasedFlag const aliased_jvm_flags[] = {
396 { "DefaultMaxRAMFraction", "MaxRAMFraction" },
397 { "CMSMarkStackSizeMax", "MarkStackSizeMax" },
398 { "CMSMarkStackSize", "MarkStackSize" },
399 { "G1MarkStackSize", "MarkStackSize" },
400 { "ParallelMarkingThreads", "ConcGCThreads" },
401 { "ParallelCMSThreads", "ConcGCThreads" },
402 { "CreateMinidumpOnCrash", "CreateCoredumpOnCrash" },
403 { NULL, NULL}
404 };
405
406 static AliasedLoggingFlag const aliased_logging_flags[] = {
407 { "TraceClassLoading", LogLevel::Info, true, LogTag::_classload },
408 { "TraceClassUnloading", LogLevel::Info, true, LogTag::_classunload },
409 { "TraceClassResolution", LogLevel::Info, true, LogTag::_classresolve },
410 { "TraceExceptions", LogLevel::Info, true, LogTag::_exceptions },
411 { "TraceMonitorInflation", LogLevel::Debug, true, LogTag::_monitorinflation },
412 { NULL, LogLevel::Off, false, LogTag::__NO_TAG }
413 };
414
415 // Return true if "v" is less than "other", where "other" may be "undefined".
416 static bool version_less_than(JDK_Version v, JDK_Version other) {
417 assert(!v.is_undefined(), "must be defined");
418 if (!other.is_undefined() && v.compare(other) >= 0) {
419 return false;
420 } else {
421 return true;
422 }
423 }
424
425 static bool lookup_special_flag(const char *flag_name, SpecialFlag& flag) {
426 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
427 if ((strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
428 flag = special_jvm_flags[i];
429 return true;
430 }
431 }
432 return false;
433 }
434
435 bool Arguments::is_obsolete_flag(const char *flag_name, JDK_Version* version) {
436 assert(version != NULL, "Must provide a version buffer");
437 SpecialFlag flag;
438 if (lookup_special_flag(flag_name, flag)) {
439 if (!flag.obsolete_in.is_undefined()) {
440 if (version_less_than(JDK_Version::current(), flag.expired_in)) {
441 *version = flag.obsolete_in;
442 return true;
443 }
444 }
445 }
446 return false;
447 }
448
449 int Arguments::is_deprecated_flag(const char *flag_name, JDK_Version* version) {
450 assert(version != NULL, "Must provide a version buffer");
451 SpecialFlag flag;
452 if (lookup_special_flag(flag_name, flag)) {
453 if (!flag.deprecated_in.is_undefined()) {
454 if (version_less_than(JDK_Version::current(), flag.obsolete_in) &&
455 version_less_than(JDK_Version::current(), flag.expired_in)) {
456 *version = flag.deprecated_in;
457 return 1;
458 } else {
459 return -1;
460 }
461 }
462 }
463 return 0;
464 }
465
466 const char* Arguments::real_flag_name(const char *flag_name) {
467 for (size_t i = 0; aliased_jvm_flags[i].alias_name != NULL; i++) {
468 const AliasedFlag& flag_status = aliased_jvm_flags[i];
469 if (strcmp(flag_status.alias_name, flag_name) == 0) {
470 return flag_status.real_name;
471 }
472 }
473 return flag_name;
474 }
475
476 #ifdef ASSERT
477 static bool lookup_special_flag(const char *flag_name, size_t skip_index) {
478 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
479 if ((i != skip_index) && (strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
480 return true;
481 }
482 }
483 return false;
484 }
485
486 static bool verify_special_jvm_flags() {
487 bool success = true;
488 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
489 const SpecialFlag& flag = special_jvm_flags[i];
490 if (lookup_special_flag(flag.name, i)) {
491 warning("Duplicate special flag declaration \"%s\"", flag.name);
492 success = false;
493 }
494 if (flag.deprecated_in.is_undefined() &&
495 flag.obsolete_in.is_undefined()) {
496 warning("Special flag entry \"%s\" must declare version deprecated and/or obsoleted in.", flag.name);
497 success = false;
498 }
499
500 if (!flag.deprecated_in.is_undefined()) {
501 if (!version_less_than(flag.deprecated_in, flag.obsolete_in)) {
502 warning("Special flag entry \"%s\" must be deprecated before obsoleted.", flag.name);
503 success = false;
504 }
505
506 if (!version_less_than(flag.deprecated_in, flag.expired_in)) {
507 warning("Special flag entry \"%s\" must be deprecated before expired.", flag.name);
508 success = false;
509 }
510 }
511
512 if (!flag.obsolete_in.is_undefined()) {
513 if (!version_less_than(flag.obsolete_in, flag.expired_in)) {
514 warning("Special flag entry \"%s\" must be obsoleted before expired.", flag.name);
515 success = false;
516 }
517
518 // if flag has become obsolete it should not have a "globals" flag defined anymore.
519 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) {
520 if (Flag::find_flag(flag.name) != NULL) {
521 warning("Global variable for obsolete special flag entry \"%s\" should be removed", flag.name);
522 success = false;
523 }
524 }
525 }
526
527 if (!flag.expired_in.is_undefined()) {
528 // if flag has become expired it should not have a "globals" flag defined anymore.
529 if (!version_less_than(JDK_Version::current(), flag.expired_in)) {
530 if (Flag::find_flag(flag.name) != NULL) {
531 warning("Global variable for expired flag entry \"%s\" should be removed", flag.name);
532 success = false;
533 }
534 }
535 }
536
537 }
538 return success;
539 }
540 #endif
541
542 // Constructs the system class path (aka boot class path) from the following
543 // components, in order:
544 //
545 // prefix // from -Xbootclasspath/p:...
546 // base // from os::get_system_properties() or -Xbootclasspath=
547 // suffix // from -Xbootclasspath/a:...
548 //
549 // This could be AllStatic, but it isn't needed after argument processing is
550 // complete.
551 class SysClassPath: public StackObj {
552 public:
553 SysClassPath(const char* base);
554 ~SysClassPath();
555
556 inline void set_base(const char* base);
557 inline void add_prefix(const char* prefix);
558 inline void add_suffix_to_prefix(const char* suffix);
559 inline void add_suffix(const char* suffix);
560 inline void reset_path(const char* base);
561
562 inline const char* get_base() const { return _items[_scp_base]; }
563 inline const char* get_prefix() const { return _items[_scp_prefix]; }
564 inline const char* get_suffix() const { return _items[_scp_suffix]; }
565
566 // Combine all the components into a single c-heap-allocated string; caller
567 // must free the string if/when no longer needed.
568 char* combined_path();
569
570 private:
571 // Utility routines.
572 static char* add_to_path(const char* path, const char* str, bool prepend);
573 static char* add_jars_to_path(char* path, const char* directory);
574
575 inline void reset_item_at(int index);
576
577 // Array indices for the items that make up the sysclasspath. All except the
578 // base are allocated in the C heap and freed by this class.
579 enum {
580 _scp_prefix, // from -Xbootclasspath/p:...
581 _scp_base, // the default sysclasspath
582 _scp_suffix, // from -Xbootclasspath/a:...
583 _scp_nitems // the number of items, must be last.
584 };
585
586 const char* _items[_scp_nitems];
587 };
588
589 SysClassPath::SysClassPath(const char* base) {
590 memset(_items, 0, sizeof(_items));
591 _items[_scp_base] = base;
592 }
593
594 SysClassPath::~SysClassPath() {
595 // Free everything except the base.
596 for (int i = 0; i < _scp_nitems; ++i) {
597 if (i != _scp_base) reset_item_at(i);
598 }
599 }
600
601 inline void SysClassPath::set_base(const char* base) {
602 _items[_scp_base] = base;
603 }
604
605 inline void SysClassPath::add_prefix(const char* prefix) {
606 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], prefix, true);
607 }
608
609 inline void SysClassPath::add_suffix_to_prefix(const char* suffix) {
610 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], suffix, false);
611 }
612
613 inline void SysClassPath::add_suffix(const char* suffix) {
614 _items[_scp_suffix] = add_to_path(_items[_scp_suffix], suffix, false);
615 }
616
617 inline void SysClassPath::reset_item_at(int index) {
618 assert(index < _scp_nitems && index != _scp_base, "just checking");
619 if (_items[index] != NULL) {
620 FREE_C_HEAP_ARRAY(char, _items[index]);
621 _items[index] = NULL;
622 }
623 }
624
625 inline void SysClassPath::reset_path(const char* base) {
626 // Clear the prefix and suffix.
627 reset_item_at(_scp_prefix);
628 reset_item_at(_scp_suffix);
629 set_base(base);
630 }
631
632 //------------------------------------------------------------------------------
633
634
635 // Combine the bootclasspath elements, some of which may be null, into a single
636 // c-heap-allocated string.
637 char* SysClassPath::combined_path() {
638 assert(_items[_scp_base] != NULL, "empty default sysclasspath");
639
640 size_t lengths[_scp_nitems];
641 size_t total_len = 0;
642
643 const char separator = *os::path_separator();
644
645 // Get the lengths.
646 int i;
647 for (i = 0; i < _scp_nitems; ++i) {
648 if (_items[i] != NULL) {
649 lengths[i] = strlen(_items[i]);
650 // Include space for the separator char (or a NULL for the last item).
651 total_len += lengths[i] + 1;
652 }
653 }
654 assert(total_len > 0, "empty sysclasspath not allowed");
655
656 // Copy the _items to a single string.
657 char* cp = NEW_C_HEAP_ARRAY(char, total_len, mtInternal);
658 char* cp_tmp = cp;
659 for (i = 0; i < _scp_nitems; ++i) {
660 if (_items[i] != NULL) {
661 memcpy(cp_tmp, _items[i], lengths[i]);
662 cp_tmp += lengths[i];
663 *cp_tmp++ = separator;
664 }
665 }
666 *--cp_tmp = '\0'; // Replace the extra separator.
667 return cp;
668 }
669
670 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null.
671 char*
672 SysClassPath::add_to_path(const char* path, const char* str, bool prepend) {
673 char *cp;
674
675 assert(str != NULL, "just checking");
676 if (path == NULL) {
677 size_t len = strlen(str) + 1;
678 cp = NEW_C_HEAP_ARRAY(char, len, mtInternal);
679 memcpy(cp, str, len); // copy the trailing null
680 } else {
681 const char separator = *os::path_separator();
682 size_t old_len = strlen(path);
683 size_t str_len = strlen(str);
684 size_t len = old_len + str_len + 2;
685
686 if (prepend) {
687 cp = NEW_C_HEAP_ARRAY(char, len, mtInternal);
688 char* cp_tmp = cp;
689 memcpy(cp_tmp, str, str_len);
690 cp_tmp += str_len;
691 *cp_tmp = separator;
692 memcpy(++cp_tmp, path, old_len + 1); // copy the trailing null
693 FREE_C_HEAP_ARRAY(char, path);
694 } else {
695 cp = REALLOC_C_HEAP_ARRAY(char, path, len, mtInternal);
696 char* cp_tmp = cp + old_len;
697 *cp_tmp = separator;
698 memcpy(++cp_tmp, str, str_len + 1); // copy the trailing null
699 }
700 }
701 return cp;
702 }
703
704 // Scan the directory and append any jar or zip files found to path.
705 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null.
706 char* SysClassPath::add_jars_to_path(char* path, const char* directory) {
707 DIR* dir = os::opendir(directory);
708 if (dir == NULL) return path;
709
710 char dir_sep[2] = { '\0', '\0' };
711 size_t directory_len = strlen(directory);
712 const char fileSep = *os::file_separator();
713 if (directory[directory_len - 1] != fileSep) dir_sep[0] = fileSep;
714
715 /* Scan the directory for jars/zips, appending them to path. */
716 struct dirent *entry;
717 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtInternal);
718 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL) {
719 const char* name = entry->d_name;
720 const char* ext = name + strlen(name) - 4;
721 bool isJarOrZip = ext > name &&
722 (os::file_name_strcmp(ext, ".jar") == 0 ||
723 os::file_name_strcmp(ext, ".zip") == 0);
724 if (isJarOrZip) {
725 char* jarpath = NEW_C_HEAP_ARRAY(char, directory_len + 2 + strlen(name), mtInternal);
726 sprintf(jarpath, "%s%s%s", directory, dir_sep, name);
727 path = add_to_path(path, jarpath, false);
728 FREE_C_HEAP_ARRAY(char, jarpath);
729 }
730 }
731 FREE_C_HEAP_ARRAY(char, dbuf);
732 os::closedir(dir);
733 return path;
734 }
735
736 // Parses a memory size specification string.
737 static bool atomull(const char *s, julong* result) {
738 julong n = 0;
739 int args_read = 0;
740 bool is_hex = false;
741 // Skip leading 0[xX] for hexadecimal
742 if (*s =='0' && (*(s+1) == 'x' || *(s+1) == 'X')) {
743 s += 2;
744 is_hex = true;
745 args_read = sscanf(s, JULONG_FORMAT_X, &n);
746 } else {
747 args_read = sscanf(s, JULONG_FORMAT, &n);
748 }
749 if (args_read != 1) {
750 return false;
751 }
752 while (*s != '\0' && (isdigit(*s) || (is_hex && isxdigit(*s)))) {
753 s++;
754 }
755 // 4705540: illegal if more characters are found after the first non-digit
756 if (strlen(s) > 1) {
757 return false;
758 }
759 switch (*s) {
760 case 'T': case 't':
761 *result = n * G * K;
762 // Check for overflow.
763 if (*result/((julong)G * K) != n) return false;
764 return true;
765 case 'G': case 'g':
766 *result = n * G;
767 if (*result/G != n) return false;
768 return true;
769 case 'M': case 'm':
770 *result = n * M;
771 if (*result/M != n) return false;
772 return true;
773 case 'K': case 'k':
774 *result = n * K;
775 if (*result/K != n) return false;
776 return true;
777 case '\0':
778 *result = n;
779 return true;
780 default:
781 return false;
782 }
783 }
784
785 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size) {
786 if (size < min_size) return arg_too_small;
787 // Check that size will fit in a size_t (only relevant on 32-bit)
788 if (size > max_uintx) return arg_too_big;
789 return arg_in_range;
790 }
791
792 // Describe an argument out of range error
793 void Arguments::describe_range_error(ArgsRange errcode) {
794 switch(errcode) {
795 case arg_too_big:
796 jio_fprintf(defaultStream::error_stream(),
797 "The specified size exceeds the maximum "
798 "representable size.\n");
799 break;
800 case arg_too_small:
801 case arg_unreadable:
802 case arg_in_range:
803 // do nothing for now
804 break;
805 default:
806 ShouldNotReachHere();
807 }
808 }
809
810 static bool set_bool_flag(const char* name, bool value, Flag::Flags origin) {
811 if (CommandLineFlags::boolAtPut(name, &value, origin) == Flag::SUCCESS) {
812 return true;
813 } else {
814 return false;
815 }
816 }
817
818 static bool set_fp_numeric_flag(const char* name, char* value, Flag::Flags origin) {
819 char* end;
820 errno = 0;
821 double v = strtod(value, &end);
822 if ((errno != 0) || (*end != 0)) {
823 return false;
824 }
825
826 if (CommandLineFlags::doubleAtPut(name, &v, origin) == Flag::SUCCESS) {
827 return true;
828 }
829 return false;
830 }
831
832 static bool set_numeric_flag(const char* name, char* value, Flag::Flags origin) {
833 julong v;
834 int int_v;
835 intx intx_v;
836 bool is_neg = false;
837 Flag* result = Flag::find_flag(name, strlen(name));
838
839 if (result == NULL) {
840 return false;
841 }
842
843 // Check the sign first since atomull() parses only unsigned values.
844 if (*value == '-') {
845 if (!result->is_intx() && !result->is_int()) {
846 return false;
847 }
848 value++;
849 is_neg = true;
850 }
851 if (!atomull(value, &v)) {
852 return false;
853 }
854 if (result->is_int()) {
855 int_v = (int) v;
856 if (is_neg) {
857 int_v = -int_v;
858 }
859 return CommandLineFlags::intAtPut(result, &int_v, origin) == Flag::SUCCESS;
860 } else if (result->is_uint()) {
861 uint uint_v = (uint) v;
862 return CommandLineFlags::uintAtPut(result, &uint_v, origin) == Flag::SUCCESS;
863 } else if (result->is_intx()) {
864 intx_v = (intx) v;
865 if (is_neg) {
866 intx_v = -intx_v;
867 }
868 return CommandLineFlags::intxAtPut(result, &intx_v, origin) == Flag::SUCCESS;
869 } else if (result->is_uintx()) {
870 uintx uintx_v = (uintx) v;
871 return CommandLineFlags::uintxAtPut(result, &uintx_v, origin) == Flag::SUCCESS;
872 } else if (result->is_uint64_t()) {
873 uint64_t uint64_t_v = (uint64_t) v;
874 return CommandLineFlags::uint64_tAtPut(result, &uint64_t_v, origin) == Flag::SUCCESS;
875 } else if (result->is_size_t()) {
876 size_t size_t_v = (size_t) v;
877 return CommandLineFlags::size_tAtPut(result, &size_t_v, origin) == Flag::SUCCESS;
878 } else {
879 return false;
880 }
881 }
882
883 static bool set_string_flag(const char* name, const char* value, Flag::Flags origin) {
884 if (CommandLineFlags::ccstrAtPut(name, &value, origin) != Flag::SUCCESS) return false;
885 // Contract: CommandLineFlags always returns a pointer that needs freeing.
886 FREE_C_HEAP_ARRAY(char, value);
887 return true;
888 }
889
890 static bool append_to_string_flag(const char* name, const char* new_value, Flag::Flags origin) {
891 const char* old_value = "";
892 if (CommandLineFlags::ccstrAt(name, &old_value) != Flag::SUCCESS) return false;
893 size_t old_len = old_value != NULL ? strlen(old_value) : 0;
894 size_t new_len = strlen(new_value);
895 const char* value;
896 char* free_this_too = NULL;
897 if (old_len == 0) {
898 value = new_value;
899 } else if (new_len == 0) {
900 value = old_value;
901 } else {
902 char* buf = NEW_C_HEAP_ARRAY(char, old_len + 1 + new_len + 1, mtInternal);
903 // each new setting adds another LINE to the switch:
904 sprintf(buf, "%s\n%s", old_value, new_value);
905 value = buf;
906 free_this_too = buf;
907 }
908 (void) CommandLineFlags::ccstrAtPut(name, &value, origin);
909 // CommandLineFlags always returns a pointer that needs freeing.
910 FREE_C_HEAP_ARRAY(char, value);
911 if (free_this_too != NULL) {
912 // CommandLineFlags made its own copy, so I must delete my own temp. buffer.
913 FREE_C_HEAP_ARRAY(char, free_this_too);
914 }
915 return true;
916 }
917
918 const char* Arguments::handle_aliases_and_deprecation(const char* arg, bool warn) {
919 const char* real_name = real_flag_name(arg);
920 JDK_Version since = JDK_Version();
921 switch (is_deprecated_flag(arg, &since)) {
922 case -1:
923 return NULL; // obsolete or expired, don't process normally
924 case 0:
925 return real_name;
926 case 1: {
927 if (warn) {
928 char version[256];
929 since.to_string(version, sizeof(version));
930 if (real_name != arg) {
931 warning("Option %s was deprecated in version %s and will likely be removed in a future release. Use option %s instead.",
932 arg, version, real_name);
933 } else {
934 warning("Option %s was deprecated in version %s and will likely be removed in a future release.",
935 arg, version);
936 }
937 }
938 return real_name;
939 }
940 }
941 ShouldNotReachHere();
942 return NULL;
943 }
944
945 AliasedLoggingFlag Arguments::catch_logging_aliases(const char* name){
946 for (size_t i = 0; aliased_logging_flags[i].alias_name != NULL; i++) {
947 const AliasedLoggingFlag& alf = aliased_logging_flags[i];
948 if (strcmp(alf.alias_name, name) == 0) {
949 return alf;
950 }
951 }
952 AliasedLoggingFlag a = {NULL, LogLevel::Off, false, LogTag::__NO_TAG};
953 return a;
954 }
955
956 bool Arguments::parse_argument(const char* arg, Flag::Flags origin) {
957
958 // range of acceptable characters spelled out for portability reasons
959 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]"
960 #define BUFLEN 255
961 char name[BUFLEN+1];
962 char dummy;
963 const char* real_name;
964 bool warn_if_deprecated = true;
965 AliasedLoggingFlag alf;
966
967 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
968 alf = catch_logging_aliases(name);
969 if (alf.alias_name != NULL){
970 LogConfiguration::configure_stdout(LogLevel::Off, alf.exactMatch, alf.tag, LogTag::__NO_TAG);
971 return true;
972 }
973 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
974 if (real_name == NULL) {
975 return false;
976 }
977 return set_bool_flag(real_name, false, origin);
978 }
979 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
980 alf = catch_logging_aliases(name);
981 if (alf.alias_name != NULL){
982 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag, LogTag::__NO_TAG);
983 return true;
984 }
985 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
986 if (real_name == NULL) {
987 return false;
988 }
989 return set_bool_flag(real_name, true, origin);
990 }
991
992 char punct;
993 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') {
994 const char* value = strchr(arg, '=') + 1;
995 Flag* flag;
996
997 // this scanf pattern matches both strings (handled here) and numbers (handled later))
998 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
999 if (real_name == NULL) {
1000 return false;
1001 }
1002 flag = Flag::find_flag(real_name);
1003 if (flag != NULL && flag->is_ccstr()) {
1004 if (flag->ccstr_accumulates()) {
1005 return append_to_string_flag(real_name, value, origin);
1006 } else {
1007 if (value[0] == '\0') {
1008 value = NULL;
1009 }
1010 return set_string_flag(real_name, value, origin);
1011 }
1012 } else {
1013 warn_if_deprecated = false; // if arg is deprecated, we've already done warning...
1014 }
1015 }
1016
1017 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') {
1018 const char* value = strchr(arg, '=') + 1;
1019 // -XX:Foo:=xxx will reset the string flag to the given value.
1020 if (value[0] == '\0') {
1021 value = NULL;
1022 }
1023 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1024 if (real_name == NULL) {
1025 return false;
1026 }
1027 return set_string_flag(real_name, value, origin);
1028 }
1029
1030 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.eE+]"
1031 #define SIGNED_NUMBER_RANGE "[-0123456789]"
1032 #define NUMBER_RANGE "[0123456789eE+-]"
1033 char value[BUFLEN + 1];
1034 char value2[BUFLEN + 1];
1035 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) {
1036 // Looks like a floating-point number -- try again with more lenient format string
1037 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) {
1038 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1039 if (real_name == NULL) {
1040 return false;
1041 }
1042 return set_fp_numeric_flag(real_name, value, origin);
1043 }
1044 }
1045
1046 #define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]"
1047 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) {
1048 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1049 if (real_name == NULL) {
1050 return false;
1051 }
1052 return set_numeric_flag(real_name, value, origin);
1053 }
1054
1055 return false;
1056 }
1057
1058 void Arguments::add_string(char*** bldarray, int* count, const char* arg) {
1059 assert(bldarray != NULL, "illegal argument");
1060
1061 if (arg == NULL) {
1062 return;
1063 }
1064
1065 int new_count = *count + 1;
1066
1067 // expand the array and add arg to the last element
1068 if (*bldarray == NULL) {
1069 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtInternal);
1070 } else {
1071 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtInternal);
1072 }
1073 (*bldarray)[*count] = os::strdup_check_oom(arg);
1074 *count = new_count;
1075 }
1076
1077 void Arguments::build_jvm_args(const char* arg) {
1078 add_string(&_jvm_args_array, &_num_jvm_args, arg);
1079 }
1080
1081 void Arguments::build_jvm_flags(const char* arg) {
1082 add_string(&_jvm_flags_array, &_num_jvm_flags, arg);
1083 }
1084
1085 // utility function to return a string that concatenates all
1086 // strings in a given char** array
1087 const char* Arguments::build_resource_string(char** args, int count) {
1088 if (args == NULL || count == 0) {
1089 return NULL;
1090 }
1091 size_t length = strlen(args[0]) + 1; // add 1 for the null terminator
1092 for (int i = 1; i < count; i++) {
1093 length += strlen(args[i]) + 1; // add 1 for a space
1094 }
1095 char* s = NEW_RESOURCE_ARRAY(char, length);
1096 strcpy(s, args[0]);
1097 for (int j = 1; j < count; j++) {
1098 strcat(s, " ");
1099 strcat(s, args[j]);
1100 }
1101 return (const char*) s;
1102 }
1103
1104 void Arguments::print_on(outputStream* st) {
1105 st->print_cr("VM Arguments:");
1106 if (num_jvm_flags() > 0) {
1107 st->print("jvm_flags: "); print_jvm_flags_on(st);
1108 st->cr();
1109 }
1110 if (num_jvm_args() > 0) {
1111 st->print("jvm_args: "); print_jvm_args_on(st);
1112 st->cr();
1113 }
1114 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>");
1115 if (_java_class_path != NULL) {
1116 char* path = _java_class_path->value();
1117 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path );
1118 }
1119 st->print_cr("Launcher Type: %s", _sun_java_launcher);
1120 }
1121
1122 void Arguments::print_summary_on(outputStream* st) {
1123 // Print the command line. Environment variables that are helpful for
1124 // reproducing the problem are written later in the hs_err file.
1125 // flags are from setting file
1126 if (num_jvm_flags() > 0) {
1127 st->print_raw("Settings File: ");
1128 print_jvm_flags_on(st);
1129 st->cr();
1130 }
1131 // args are the command line and environment variable arguments.
1132 st->print_raw("Command Line: ");
1133 if (num_jvm_args() > 0) {
1134 print_jvm_args_on(st);
1135 }
1136 // this is the classfile and any arguments to the java program
1137 if (java_command() != NULL) {
1138 st->print("%s", java_command());
1139 }
1140 st->cr();
1141 }
1142
1143 void Arguments::print_jvm_flags_on(outputStream* st) {
1144 if (_num_jvm_flags > 0) {
1145 for (int i=0; i < _num_jvm_flags; i++) {
1146 st->print("%s ", _jvm_flags_array[i]);
1147 }
1148 }
1149 }
1150
1151 void Arguments::print_jvm_args_on(outputStream* st) {
1152 if (_num_jvm_args > 0) {
1153 for (int i=0; i < _num_jvm_args; i++) {
1154 st->print("%s ", _jvm_args_array[i]);
1155 }
1156 }
1157 }
1158
1159 bool Arguments::process_argument(const char* arg,
1160 jboolean ignore_unrecognized,
1161 Flag::Flags origin) {
1162 JDK_Version since = JDK_Version();
1163
1164 if (parse_argument(arg, origin)) {
1165 return true;
1166 }
1167
1168 // Determine if the flag has '+', '-', or '=' characters.
1169 bool has_plus_minus = (*arg == '+' || *arg == '-');
1170 const char* const argname = has_plus_minus ? arg + 1 : arg;
1171
1172 size_t arg_len;
1173 const char* equal_sign = strchr(argname, '=');
1174 if (equal_sign == NULL) {
1175 arg_len = strlen(argname);
1176 } else {
1177 arg_len = equal_sign - argname;
1178 }
1179
1180 // Only make the obsolete check for valid arguments.
1181 if (arg_len <= BUFLEN) {
1182 // Construct a string which consists only of the argument name without '+', '-', or '='.
1183 char stripped_argname[BUFLEN+1];
1184 strncpy(stripped_argname, argname, arg_len);
1185 stripped_argname[arg_len] = '\0'; // strncpy may not null terminate.
1186
1187 if (is_obsolete_flag(stripped_argname, &since)) {
1188 char version[256];
1189 since.to_string(version, sizeof(version));
1190 warning("Ignoring option %s; support was removed in %s", stripped_argname, version);
1191 return true;
1192 }
1193 }
1194
1195 // For locked flags, report a custom error message if available.
1196 // Otherwise, report the standard unrecognized VM option.
1197 Flag* found_flag = Flag::find_flag((const char*)argname, arg_len, true, true);
1198 if (found_flag != NULL) {
1199 char locked_message_buf[BUFLEN];
1200 Flag::MsgType msg_type = found_flag->get_locked_message(locked_message_buf, BUFLEN);
1201 if (strlen(locked_message_buf) == 0) {
1202 if (found_flag->is_bool() && !has_plus_minus) {
1203 jio_fprintf(defaultStream::error_stream(),
1204 "Missing +/- setting for VM option '%s'\n", argname);
1205 } else if (!found_flag->is_bool() && has_plus_minus) {
1206 jio_fprintf(defaultStream::error_stream(),
1207 "Unexpected +/- setting in VM option '%s'\n", argname);
1208 } else {
1209 jio_fprintf(defaultStream::error_stream(),
1210 "Improperly specified VM option '%s'\n", argname);
1211 }
1212 } else {
1213 #ifdef PRODUCT
1214 bool mismatched = ((msg_type == Flag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD) ||
1215 (msg_type == Flag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD));
1216 if (ignore_unrecognized && mismatched) {
1217 return true;
1218 }
1219 #endif
1220 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf);
1221 }
1222 } else {
1223 if (ignore_unrecognized) {
1224 return true;
1225 }
1226 jio_fprintf(defaultStream::error_stream(),
1227 "Unrecognized VM option '%s'\n", argname);
1228 Flag* fuzzy_matched = Flag::fuzzy_match((const char*)argname, arg_len, true);
1229 if (fuzzy_matched != NULL) {
1230 jio_fprintf(defaultStream::error_stream(),
1231 "Did you mean '%s%s%s'? ",
1232 (fuzzy_matched->is_bool()) ? "(+/-)" : "",
1233 fuzzy_matched->_name,
1234 (fuzzy_matched->is_bool()) ? "" : "=<value>");
1235 }
1236 }
1237
1238 // allow for commandline "commenting out" options like -XX:#+Verbose
1239 return arg[0] == '#';
1240 }
1241
1242 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) {
1243 FILE* stream = fopen(file_name, "rb");
1244 if (stream == NULL) {
1245 if (should_exist) {
1246 jio_fprintf(defaultStream::error_stream(),
1247 "Could not open settings file %s\n", file_name);
1248 return false;
1249 } else {
1250 return true;
1251 }
1252 }
1253
1254 char token[1024];
1255 int pos = 0;
1256
1257 bool in_white_space = true;
1258 bool in_comment = false;
1259 bool in_quote = false;
1260 char quote_c = 0;
1261 bool result = true;
1262
1263 int c = getc(stream);
1264 while(c != EOF && pos < (int)(sizeof(token)-1)) {
1265 if (in_white_space) {
1266 if (in_comment) {
1267 if (c == '\n') in_comment = false;
1268 } else {
1269 if (c == '#') in_comment = true;
1270 else if (!isspace(c)) {
1271 in_white_space = false;
1272 token[pos++] = c;
1273 }
1274 }
1275 } else {
1276 if (c == '\n' || (!in_quote && isspace(c))) {
1277 // token ends at newline, or at unquoted whitespace
1278 // this allows a way to include spaces in string-valued options
1279 token[pos] = '\0';
1280 logOption(token);
1281 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
1282 build_jvm_flags(token);
1283 pos = 0;
1284 in_white_space = true;
1285 in_quote = false;
1286 } else if (!in_quote && (c == '\'' || c == '"')) {
1287 in_quote = true;
1288 quote_c = c;
1289 } else if (in_quote && (c == quote_c)) {
1290 in_quote = false;
1291 } else {
1292 token[pos++] = c;
1293 }
1294 }
1295 c = getc(stream);
1296 }
1297 if (pos > 0) {
1298 token[pos] = '\0';
1299 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
1300 build_jvm_flags(token);
1301 }
1302 fclose(stream);
1303 return result;
1304 }
1305
1306 //=============================================================================================================
1307 // Parsing of properties (-D)
1308
1309 const char* Arguments::get_property(const char* key) {
1310 return PropertyList_get_value(system_properties(), key);
1311 }
1312
1313 bool Arguments::add_property(const char* prop) {
1314 const char* eq = strchr(prop, '=');
1315 const char* key;
1316 const char* value = "";
1317
1318 if (eq == NULL) {
1319 // property doesn't have a value, thus use passed string
1320 key = prop;
1321 } else {
1322 // property have a value, thus extract it and save to the
1323 // allocated string
1324 size_t key_len = eq - prop;
1325 char* tmp_key = AllocateHeap(key_len + 1, mtInternal);
1326
1327 strncpy(tmp_key, prop, key_len);
1328 tmp_key[key_len] = '\0';
1329 key = tmp_key;
1330
1331 value = &prop[key_len + 1];
1332 }
1333
1334 if (strcmp(key, "java.compiler") == 0) {
1335 process_java_compiler_argument(value);
1336 // Record value in Arguments, but let it get passed to Java.
1337 } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 ||
1338 strcmp(key, "sun.java.launcher.pid") == 0) {
1339 // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are
1340 // private and are processed in process_sun_java_launcher_properties();
1341 // the sun.java.launcher property is passed on to the java application
1342 } else if (strcmp(key, "sun.boot.library.path") == 0) {
1343 PropertyList_unique_add(&_system_properties, key, value, true);
1344 } else {
1345 if (strcmp(key, "sun.java.command") == 0) {
1346 char *old_java_command = _java_command;
1347 _java_command = os::strdup_check_oom(value, mtInternal);
1348 if (old_java_command != NULL) {
1349 os::free(old_java_command);
1350 }
1351 } else if (strcmp(key, "java.vendor.url.bug") == 0) {
1352 const char* old_java_vendor_url_bug = _java_vendor_url_bug;
1353 // save it in _java_vendor_url_bug, so JVM fatal error handler can access
1354 // its value without going through the property list or making a Java call.
1355 _java_vendor_url_bug = os::strdup_check_oom(value, mtInternal);
1356 if (old_java_vendor_url_bug != DEFAULT_VENDOR_URL_BUG) {
1357 assert(old_java_vendor_url_bug != NULL, "_java_vendor_url_bug is NULL");
1358 os::free((void *)old_java_vendor_url_bug);
1359 }
1360 }
1361
1362 // Create new property and add at the end of the list
1363 PropertyList_unique_add(&_system_properties, key, value);
1364 }
1365
1366 if (key != prop) {
1367 // SystemProperty copy passed value, thus free previously allocated
1368 // memory
1369 FreeHeap((void *)key);
1370 }
1371
1372 return true;
1373 }
1374
1375 //===========================================================================================================
1376 // Setting int/mixed/comp mode flags
1377
1378 void Arguments::set_mode_flags(Mode mode) {
1379 // Set up default values for all flags.
1380 // If you add a flag to any of the branches below,
1381 // add a default value for it here.
1382 set_java_compiler(false);
1383 _mode = mode;
1384
1385 // Ensure Agent_OnLoad has the correct initial values.
1386 // This may not be the final mode; mode may change later in onload phase.
1387 PropertyList_unique_add(&_system_properties, "java.vm.info",
1388 VM_Version::vm_info_string(), false);
1389
1390 UseInterpreter = true;
1391 UseCompiler = true;
1392 UseLoopCounter = true;
1393
1394 // Default values may be platform/compiler dependent -
1395 // use the saved values
1396 ClipInlining = Arguments::_ClipInlining;
1397 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods;
1398 UseOnStackReplacement = Arguments::_UseOnStackReplacement;
1399 BackgroundCompilation = Arguments::_BackgroundCompilation;
1400 if (TieredCompilation) {
1401 if (FLAG_IS_DEFAULT(Tier3InvokeNotifyFreqLog)) {
1402 Tier3InvokeNotifyFreqLog = Arguments::_Tier3InvokeNotifyFreqLog;
1403 }
1404 if (FLAG_IS_DEFAULT(Tier4InvocationThreshold)) {
1405 Tier4InvocationThreshold = Arguments::_Tier4InvocationThreshold;
1406 }
1407 }
1408
1409 // Change from defaults based on mode
1410 switch (mode) {
1411 default:
1412 ShouldNotReachHere();
1413 break;
1414 case _int:
1415 UseCompiler = false;
1416 UseLoopCounter = false;
1417 AlwaysCompileLoopMethods = false;
1418 UseOnStackReplacement = false;
1419 break;
1420 case _mixed:
1421 // same as default
1422 break;
1423 case _comp:
1424 UseInterpreter = false;
1425 BackgroundCompilation = false;
1426 ClipInlining = false;
1427 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more.
1428 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and
1429 // compile a level 4 (C2) and then continue executing it.
1430 if (TieredCompilation) {
1431 Tier3InvokeNotifyFreqLog = 0;
1432 Tier4InvocationThreshold = 0;
1433 }
1434 break;
1435 }
1436 }
1437
1438 #if defined(COMPILER2) || INCLUDE_JVMCI || defined(_LP64) || !INCLUDE_CDS
1439 // Conflict: required to use shared spaces (-Xshare:on), but
1440 // incompatible command line options were chosen.
1441
1442 static void no_shared_spaces(const char* message) {
1443 if (RequireSharedSpaces) {
1444 jio_fprintf(defaultStream::error_stream(),
1445 "Class data sharing is inconsistent with other specified options.\n");
1446 vm_exit_during_initialization("Unable to use shared archive.", message);
1447 } else {
1448 FLAG_SET_DEFAULT(UseSharedSpaces, false);
1449 }
1450 }
1451 #endif
1452
1453 // Returns threshold scaled with the value of scale.
1454 // If scale < 0.0, threshold is returned without scaling.
1455 intx Arguments::scaled_compile_threshold(intx threshold, double scale) {
1456 if (scale == 1.0 || scale < 0.0) {
1457 return threshold;
1458 } else {
1459 return (intx)(threshold * scale);
1460 }
1461 }
1462
1463 // Returns freq_log scaled with the value of scale.
1464 // Returned values are in the range of [0, InvocationCounter::number_of_count_bits + 1].
1465 // If scale < 0.0, freq_log is returned without scaling.
1466 intx Arguments::scaled_freq_log(intx freq_log, double scale) {
1467 // Check if scaling is necessary or if negative value was specified.
1468 if (scale == 1.0 || scale < 0.0) {
1469 return freq_log;
1470 }
1471 // Check values to avoid calculating log2 of 0.
1472 if (scale == 0.0 || freq_log == 0) {
1473 return 0;
1474 }
1475 // Determine the maximum notification frequency value currently supported.
1476 // The largest mask value that the interpreter/C1 can handle is
1477 // of length InvocationCounter::number_of_count_bits. Mask values are always
1478 // one bit shorter then the value of the notification frequency. Set
1479 // max_freq_bits accordingly.
1480 intx max_freq_bits = InvocationCounter::number_of_count_bits + 1;
1481 intx scaled_freq = scaled_compile_threshold((intx)1 << freq_log, scale);
1482 if (scaled_freq == 0) {
1483 // Return 0 right away to avoid calculating log2 of 0.
1484 return 0;
1485 } else if (scaled_freq > nth_bit(max_freq_bits)) {
1486 return max_freq_bits;
1487 } else {
1488 return log2_intptr(scaled_freq);
1489 }
1490 }
1491
1492 void Arguments::set_tiered_flags() {
1493 // With tiered, set default policy to AdvancedThresholdPolicy, which is 3.
1494 if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) {
1495 FLAG_SET_DEFAULT(CompilationPolicyChoice, 3);
1496 }
1497 if (CompilationPolicyChoice < 2) {
1498 vm_exit_during_initialization(
1499 "Incompatible compilation policy selected", NULL);
1500 }
1501 // Increase the code cache size - tiered compiles a lot more.
1502 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
1503 FLAG_SET_ERGO(uintx, ReservedCodeCacheSize,
1504 MIN2(CODE_CACHE_DEFAULT_LIMIT, ReservedCodeCacheSize * 5));
1505 }
1506 // Enable SegmentedCodeCache if TieredCompilation is enabled and ReservedCodeCacheSize >= 240M
1507 if (FLAG_IS_DEFAULT(SegmentedCodeCache) && ReservedCodeCacheSize >= 240*M) {
1508 FLAG_SET_ERGO(bool, SegmentedCodeCache, true);
1509 }
1510 if (!UseInterpreter) { // -Xcomp
1511 Tier3InvokeNotifyFreqLog = 0;
1512 Tier4InvocationThreshold = 0;
1513 }
1514
1515 if (CompileThresholdScaling < 0) {
1516 vm_exit_during_initialization("Negative value specified for CompileThresholdScaling", NULL);
1517 }
1518
1519 // Scale tiered compilation thresholds.
1520 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves compilation thresholds unchanged.
1521 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
1522 FLAG_SET_ERGO(intx, Tier0InvokeNotifyFreqLog, scaled_freq_log(Tier0InvokeNotifyFreqLog));
1523 FLAG_SET_ERGO(intx, Tier0BackedgeNotifyFreqLog, scaled_freq_log(Tier0BackedgeNotifyFreqLog));
1524
1525 FLAG_SET_ERGO(intx, Tier3InvocationThreshold, scaled_compile_threshold(Tier3InvocationThreshold));
1526 FLAG_SET_ERGO(intx, Tier3MinInvocationThreshold, scaled_compile_threshold(Tier3MinInvocationThreshold));
1527 FLAG_SET_ERGO(intx, Tier3CompileThreshold, scaled_compile_threshold(Tier3CompileThreshold));
1528 FLAG_SET_ERGO(intx, Tier3BackEdgeThreshold, scaled_compile_threshold(Tier3BackEdgeThreshold));
1529
1530 // Tier2{Invocation,MinInvocation,Compile,Backedge}Threshold should be scaled here
1531 // once these thresholds become supported.
1532
1533 FLAG_SET_ERGO(intx, Tier2InvokeNotifyFreqLog, scaled_freq_log(Tier2InvokeNotifyFreqLog));
1534 FLAG_SET_ERGO(intx, Tier2BackedgeNotifyFreqLog, scaled_freq_log(Tier2BackedgeNotifyFreqLog));
1535
1536 FLAG_SET_ERGO(intx, Tier3InvokeNotifyFreqLog, scaled_freq_log(Tier3InvokeNotifyFreqLog));
1537 FLAG_SET_ERGO(intx, Tier3BackedgeNotifyFreqLog, scaled_freq_log(Tier3BackedgeNotifyFreqLog));
1538
1539 FLAG_SET_ERGO(intx, Tier23InlineeNotifyFreqLog, scaled_freq_log(Tier23InlineeNotifyFreqLog));
1540
1541 FLAG_SET_ERGO(intx, Tier4InvocationThreshold, scaled_compile_threshold(Tier4InvocationThreshold));
1542 FLAG_SET_ERGO(intx, Tier4MinInvocationThreshold, scaled_compile_threshold(Tier4MinInvocationThreshold));
1543 FLAG_SET_ERGO(intx, Tier4CompileThreshold, scaled_compile_threshold(Tier4CompileThreshold));
1544 FLAG_SET_ERGO(intx, Tier4BackEdgeThreshold, scaled_compile_threshold(Tier4BackEdgeThreshold));
1545 }
1546 }
1547
1548 #if INCLUDE_ALL_GCS
1549 static void disable_adaptive_size_policy(const char* collector_name) {
1550 if (UseAdaptiveSizePolicy) {
1551 if (FLAG_IS_CMDLINE(UseAdaptiveSizePolicy)) {
1552 warning("Disabling UseAdaptiveSizePolicy; it is incompatible with %s.",
1553 collector_name);
1554 }
1555 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false);
1556 }
1557 }
1558
1559 void Arguments::set_parnew_gc_flags() {
1560 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC && !UseG1GC,
1561 "control point invariant");
1562 assert(UseConcMarkSweepGC, "CMS is expected to be on here");
1563 assert(UseParNewGC, "ParNew should always be used with CMS");
1564
1565 if (FLAG_IS_DEFAULT(ParallelGCThreads)) {
1566 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads());
1567 assert(ParallelGCThreads > 0, "We should always have at least one thread by default");
1568 } else if (ParallelGCThreads == 0) {
1569 jio_fprintf(defaultStream::error_stream(),
1570 "The ParNew GC can not be combined with -XX:ParallelGCThreads=0\n");
1571 vm_exit(1);
1572 }
1573
1574 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 respectively,
1575 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration
1576 // we set them to 1024 and 1024.
1577 // See CR 6362902.
1578 if (FLAG_IS_DEFAULT(YoungPLABSize)) {
1579 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024);
1580 }
1581 if (FLAG_IS_DEFAULT(OldPLABSize)) {
1582 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024);
1583 }
1584
1585 // When using compressed oops, we use local overflow stacks,
1586 // rather than using a global overflow list chained through
1587 // the klass word of the object's pre-image.
1588 if (UseCompressedOops && !ParGCUseLocalOverflow) {
1589 if (!FLAG_IS_DEFAULT(ParGCUseLocalOverflow)) {
1590 warning("Forcing +ParGCUseLocalOverflow: needed if using compressed references");
1591 }
1592 FLAG_SET_DEFAULT(ParGCUseLocalOverflow, true);
1593 }
1594 assert(ParGCUseLocalOverflow || !UseCompressedOops, "Error");
1595 }
1596
1597 // Adjust some sizes to suit CMS and/or ParNew needs; these work well on
1598 // sparc/solaris for certain applications, but would gain from
1599 // further optimization and tuning efforts, and would almost
1600 // certainly gain from analysis of platform and environment.
1601 void Arguments::set_cms_and_parnew_gc_flags() {
1602 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC, "Error");
1603 assert(UseConcMarkSweepGC, "CMS is expected to be on here");
1604 assert(UseParNewGC, "ParNew should always be used with CMS");
1605
1606 // Turn off AdaptiveSizePolicy by default for cms until it is complete.
1607 disable_adaptive_size_policy("UseConcMarkSweepGC");
1608
1609 set_parnew_gc_flags();
1610
1611 size_t max_heap = align_size_down(MaxHeapSize,
1612 CardTableRS::ct_max_alignment_constraint());
1613
1614 // Now make adjustments for CMS
1615 intx tenuring_default = (intx)6;
1616 size_t young_gen_per_worker = CMSYoungGenPerWorker;
1617
1618 // Preferred young gen size for "short" pauses:
1619 // upper bound depends on # of threads and NewRatio.
1620 const size_t preferred_max_new_size_unaligned =
1621 MIN2(max_heap/(NewRatio+1), ScaleForWordSize(young_gen_per_worker * ParallelGCThreads));
1622 size_t preferred_max_new_size =
1623 align_size_up(preferred_max_new_size_unaligned, os::vm_page_size());
1624
1625 // Unless explicitly requested otherwise, size young gen
1626 // for "short" pauses ~ CMSYoungGenPerWorker*ParallelGCThreads
1627
1628 // If either MaxNewSize or NewRatio is set on the command line,
1629 // assume the user is trying to set the size of the young gen.
1630 if (FLAG_IS_DEFAULT(MaxNewSize) && FLAG_IS_DEFAULT(NewRatio)) {
1631
1632 // Set MaxNewSize to our calculated preferred_max_new_size unless
1633 // NewSize was set on the command line and it is larger than
1634 // preferred_max_new_size.
1635 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line
1636 FLAG_SET_ERGO(size_t, MaxNewSize, MAX2(NewSize, preferred_max_new_size));
1637 } else {
1638 FLAG_SET_ERGO(size_t, MaxNewSize, preferred_max_new_size);
1639 }
1640 log_trace(gc, heap)("CMS ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize);
1641
1642 // Code along this path potentially sets NewSize and OldSize
1643 log_trace(gc, heap)("CMS set min_heap_size: " SIZE_FORMAT " initial_heap_size: " SIZE_FORMAT " max_heap: " SIZE_FORMAT,
1644 min_heap_size(), InitialHeapSize, max_heap);
1645 size_t min_new = preferred_max_new_size;
1646 if (FLAG_IS_CMDLINE(NewSize)) {
1647 min_new = NewSize;
1648 }
1649 if (max_heap > min_new && min_heap_size() > min_new) {
1650 // Unless explicitly requested otherwise, make young gen
1651 // at least min_new, and at most preferred_max_new_size.
1652 if (FLAG_IS_DEFAULT(NewSize)) {
1653 FLAG_SET_ERGO(size_t, NewSize, MAX2(NewSize, min_new));
1654 FLAG_SET_ERGO(size_t, NewSize, MIN2(preferred_max_new_size, NewSize));
1655 log_trace(gc, heap)("CMS ergo set NewSize: " SIZE_FORMAT, NewSize);
1656 }
1657 // Unless explicitly requested otherwise, size old gen
1658 // so it's NewRatio x of NewSize.
1659 if (FLAG_IS_DEFAULT(OldSize)) {
1660 if (max_heap > NewSize) {
1661 FLAG_SET_ERGO(size_t, OldSize, MIN2(NewRatio*NewSize, max_heap - NewSize));
1662 log_trace(gc, heap)("CMS ergo set OldSize: " SIZE_FORMAT, OldSize);
1663 }
1664 }
1665 }
1666 }
1667 // Unless explicitly requested otherwise, definitely
1668 // promote all objects surviving "tenuring_default" scavenges.
1669 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) &&
1670 FLAG_IS_DEFAULT(SurvivorRatio)) {
1671 FLAG_SET_ERGO(uintx, MaxTenuringThreshold, tenuring_default);
1672 }
1673 // If we decided above (or user explicitly requested)
1674 // `promote all' (via MaxTenuringThreshold := 0),
1675 // prefer minuscule survivor spaces so as not to waste
1676 // space for (non-existent) survivors
1677 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) {
1678 FLAG_SET_ERGO(uintx, SurvivorRatio, MAX2((uintx)1024, SurvivorRatio));
1679 }
1680
1681 // OldPLABSize is interpreted in CMS as not the size of the PLAB in words,
1682 // but rather the number of free blocks of a given size that are used when
1683 // replenishing the local per-worker free list caches.
1684 if (FLAG_IS_DEFAULT(OldPLABSize)) {
1685 if (!FLAG_IS_DEFAULT(ResizeOldPLAB) && !ResizeOldPLAB) {
1686 // OldPLAB sizing manually turned off: Use a larger default setting,
1687 // unless it was manually specified. This is because a too-low value
1688 // will slow down scavenges.
1689 FLAG_SET_ERGO(size_t, OldPLABSize, CompactibleFreeListSpaceLAB::_default_static_old_plab_size); // default value before 6631166
1690 } else {
1691 FLAG_SET_DEFAULT(OldPLABSize, CompactibleFreeListSpaceLAB::_default_dynamic_old_plab_size); // old CMSParPromoteBlocksToClaim default
1692 }
1693 }
1694
1695 // If either of the static initialization defaults have changed, note this
1696 // modification.
1697 if (!FLAG_IS_DEFAULT(OldPLABSize) || !FLAG_IS_DEFAULT(OldPLABWeight)) {
1698 CompactibleFreeListSpaceLAB::modify_initialization(OldPLABSize, OldPLABWeight);
1699 }
1700
1701 if (!ClassUnloading) {
1702 FLAG_SET_CMDLINE(bool, CMSClassUnloadingEnabled, false);
1703 FLAG_SET_CMDLINE(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false);
1704 }
1705
1706 log_trace(gc)("MarkStackSize: %uk MarkStackSizeMax: %uk", (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K));
1707 log_trace(gc)("ConcGCThreads: %u", ConcGCThreads);
1708 }
1709 #endif // INCLUDE_ALL_GCS
1710
1711 void set_object_alignment() {
1712 // Object alignment.
1713 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2");
1714 MinObjAlignmentInBytes = ObjectAlignmentInBytes;
1715 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small");
1716 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize;
1717 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect");
1718 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1;
1719
1720 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes);
1721 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize;
1722
1723 // Oop encoding heap max
1724 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes;
1725
1726 if (SurvivorAlignmentInBytes == 0) {
1727 SurvivorAlignmentInBytes = ObjectAlignmentInBytes;
1728 }
1729
1730 #if INCLUDE_ALL_GCS
1731 // Set CMS global values
1732 CompactibleFreeListSpace::set_cms_values();
1733 #endif // INCLUDE_ALL_GCS
1734 }
1735
1736 size_t Arguments::max_heap_for_compressed_oops() {
1737 // Avoid sign flip.
1738 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size");
1739 // We need to fit both the NULL page and the heap into the memory budget, while
1740 // keeping alignment constraints of the heap. To guarantee the latter, as the
1741 // NULL page is located before the heap, we pad the NULL page to the conservative
1742 // maximum alignment that the GC may ever impose upon the heap.
1743 size_t displacement_due_to_null_page = align_size_up_(os::vm_page_size(),
1744 _conservative_max_heap_alignment);
1745
1746 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page);
1747 NOT_LP64(ShouldNotReachHere(); return 0);
1748 }
1749
1750 bool Arguments::should_auto_select_low_pause_collector() {
1751 if (UseAutoGCSelectPolicy &&
1752 !FLAG_IS_DEFAULT(MaxGCPauseMillis) &&
1753 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) {
1754 log_trace(gc)("Automatic selection of the low pause collector based on pause goal of %d (ms)", (int) MaxGCPauseMillis);
1755 return true;
1756 }
1757 return false;
1758 }
1759
1760 void Arguments::set_use_compressed_oops() {
1761 #ifndef ZERO
1762 #ifdef _LP64
1763 // MaxHeapSize is not set up properly at this point, but
1764 // the only value that can override MaxHeapSize if we are
1765 // to use UseCompressedOops is InitialHeapSize.
1766 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize);
1767
1768 if (max_heap_size <= max_heap_for_compressed_oops()) {
1769 #if !defined(COMPILER1) || defined(TIERED)
1770 if (FLAG_IS_DEFAULT(UseCompressedOops)) {
1771 FLAG_SET_ERGO(bool, UseCompressedOops, true);
1772 }
1773 #endif
1774 } else {
1775 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) {
1776 warning("Max heap size too large for Compressed Oops");
1777 FLAG_SET_DEFAULT(UseCompressedOops, false);
1778 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1779 }
1780 }
1781 #endif // _LP64
1782 #endif // ZERO
1783 }
1784
1785
1786 // NOTE: set_use_compressed_klass_ptrs() must be called after calling
1787 // set_use_compressed_oops().
1788 void Arguments::set_use_compressed_klass_ptrs() {
1789 #ifndef ZERO
1790 #ifdef _LP64
1791 // UseCompressedOops must be on for UseCompressedClassPointers to be on.
1792 if (!UseCompressedOops) {
1793 if (UseCompressedClassPointers) {
1794 warning("UseCompressedClassPointers requires UseCompressedOops");
1795 }
1796 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1797 } else {
1798 // Turn on UseCompressedClassPointers too
1799 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) {
1800 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true);
1801 }
1802 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs.
1803 if (UseCompressedClassPointers) {
1804 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) {
1805 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers");
1806 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1807 }
1808 }
1809 }
1810 #endif // _LP64
1811 #endif // !ZERO
1812 }
1813
1814 void Arguments::set_conservative_max_heap_alignment() {
1815 // The conservative maximum required alignment for the heap is the maximum of
1816 // the alignments imposed by several sources: any requirements from the heap
1817 // itself, the collector policy and the maximum page size we may run the VM
1818 // with.
1819 size_t heap_alignment = GenCollectedHeap::conservative_max_heap_alignment();
1820 #if INCLUDE_ALL_GCS
1821 if (UseParallelGC) {
1822 heap_alignment = ParallelScavengeHeap::conservative_max_heap_alignment();
1823 } else if (UseG1GC) {
1824 heap_alignment = G1CollectedHeap::conservative_max_heap_alignment();
1825 }
1826 #endif // INCLUDE_ALL_GCS
1827 _conservative_max_heap_alignment = MAX4(heap_alignment,
1828 (size_t)os::vm_allocation_granularity(),
1829 os::max_page_size(),
1830 CollectorPolicy::compute_heap_alignment());
1831 }
1832
1833 void Arguments::select_gc_ergonomically() {
1834 if (os::is_server_class_machine()) {
1835 if (should_auto_select_low_pause_collector()) {
1836 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true);
1837 } else {
1838 #if defined(JAVASE_EMBEDDED)
1839 FLAG_SET_ERGO(bool, UseParallelGC, true);
1840 #else
1841 FLAG_SET_ERGO(bool, UseG1GC, true);
1842 #endif
1843 }
1844 } else {
1845 FLAG_SET_ERGO(bool, UseSerialGC, true);
1846 }
1847 }
1848
1849 void Arguments::select_gc() {
1850 if (!gc_selected()) {
1851 select_gc_ergonomically();
1852 guarantee(gc_selected(), "No GC selected");
1853 }
1854 }
1855
1856 void Arguments::set_ergonomics_flags() {
1857 select_gc();
1858
1859 #if defined(COMPILER2) || INCLUDE_JVMCI
1860 // Shared spaces work fine with other GCs but causes bytecode rewriting
1861 // to be disabled, which hurts interpreter performance and decreases
1862 // server performance. When -server is specified, keep the default off
1863 // unless it is asked for. Future work: either add bytecode rewriting
1864 // at link time, or rewrite bytecodes in non-shared methods.
1865 if (!DumpSharedSpaces && !RequireSharedSpaces &&
1866 (FLAG_IS_DEFAULT(UseSharedSpaces) || !UseSharedSpaces)) {
1867 no_shared_spaces("COMPILER2 default: -Xshare:auto | off, have to manually setup to on.");
1868 }
1869 #endif
1870
1871 set_conservative_max_heap_alignment();
1872
1873 #ifndef ZERO
1874 #ifdef _LP64
1875 set_use_compressed_oops();
1876
1877 // set_use_compressed_klass_ptrs() must be called after calling
1878 // set_use_compressed_oops().
1879 set_use_compressed_klass_ptrs();
1880
1881 // Also checks that certain machines are slower with compressed oops
1882 // in vm_version initialization code.
1883 #endif // _LP64
1884 #endif // !ZERO
1885
1886 CodeCacheExtensions::set_ergonomics_flags();
1887 }
1888
1889 void Arguments::set_parallel_gc_flags() {
1890 assert(UseParallelGC || UseParallelOldGC, "Error");
1891 // Enable ParallelOld unless it was explicitly disabled (cmd line or rc file).
1892 if (FLAG_IS_DEFAULT(UseParallelOldGC)) {
1893 FLAG_SET_DEFAULT(UseParallelOldGC, true);
1894 }
1895 FLAG_SET_DEFAULT(UseParallelGC, true);
1896
1897 // If no heap maximum was requested explicitly, use some reasonable fraction
1898 // of the physical memory, up to a maximum of 1GB.
1899 FLAG_SET_DEFAULT(ParallelGCThreads,
1900 Abstract_VM_Version::parallel_worker_threads());
1901 if (ParallelGCThreads == 0) {
1902 jio_fprintf(defaultStream::error_stream(),
1903 "The Parallel GC can not be combined with -XX:ParallelGCThreads=0\n");
1904 vm_exit(1);
1905 }
1906
1907 if (UseAdaptiveSizePolicy) {
1908 // We don't want to limit adaptive heap sizing's freedom to adjust the heap
1909 // unless the user actually sets these flags.
1910 if (FLAG_IS_DEFAULT(MinHeapFreeRatio)) {
1911 FLAG_SET_DEFAULT(MinHeapFreeRatio, 0);
1912 }
1913 if (FLAG_IS_DEFAULT(MaxHeapFreeRatio)) {
1914 FLAG_SET_DEFAULT(MaxHeapFreeRatio, 100);
1915 }
1916 }
1917
1918 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the
1919 // SurvivorRatio has been set, reset their default values to SurvivorRatio +
1920 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger.
1921 // See CR 6362902 for details.
1922 if (!FLAG_IS_DEFAULT(SurvivorRatio)) {
1923 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) {
1924 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2);
1925 }
1926 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) {
1927 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2);
1928 }
1929 }
1930
1931 if (UseParallelOldGC) {
1932 // Par compact uses lower default values since they are treated as
1933 // minimums. These are different defaults because of the different
1934 // interpretation and are not ergonomically set.
1935 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) {
1936 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1);
1937 }
1938 }
1939 }
1940
1941 void Arguments::set_g1_gc_flags() {
1942 assert(UseG1GC, "Error");
1943 #if defined(COMPILER1) || INCLUDE_JVMCI
1944 FastTLABRefill = false;
1945 #endif
1946 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads());
1947 if (ParallelGCThreads == 0) {
1948 assert(!FLAG_IS_DEFAULT(ParallelGCThreads), "The default value for ParallelGCThreads should not be 0.");
1949 vm_exit_during_initialization("The flag -XX:+UseG1GC can not be combined with -XX:ParallelGCThreads=0", NULL);
1950 }
1951
1952 #if INCLUDE_ALL_GCS
1953 if (G1ConcRefinementThreads == 0) {
1954 FLAG_SET_DEFAULT(G1ConcRefinementThreads, ParallelGCThreads);
1955 }
1956 #endif
1957
1958 // MarkStackSize will be set (if it hasn't been set by the user)
1959 // when concurrent marking is initialized.
1960 // Its value will be based upon the number of parallel marking threads.
1961 // But we do set the maximum mark stack size here.
1962 if (FLAG_IS_DEFAULT(MarkStackSizeMax)) {
1963 FLAG_SET_DEFAULT(MarkStackSizeMax, 128 * TASKQUEUE_SIZE);
1964 }
1965
1966 if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) {
1967 // In G1, we want the default GC overhead goal to be higher than
1968 // it is for PS, or the heap might be expanded too aggressively.
1969 // We set it here to ~8%.
1970 FLAG_SET_DEFAULT(GCTimeRatio, 12);
1971 }
1972
1973 log_trace(gc)("MarkStackSize: %uk MarkStackSizeMax: %uk", (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K));
1974 log_trace(gc)("ConcGCThreads: %u", ConcGCThreads);
1975 }
1976
1977 #if !INCLUDE_ALL_GCS
1978 #ifdef ASSERT
1979 static bool verify_serial_gc_flags() {
1980 return (UseSerialGC &&
1981 !(UseParNewGC || (UseConcMarkSweepGC) || UseG1GC ||
1982 UseParallelGC || UseParallelOldGC));
1983 }
1984 #endif // ASSERT
1985 #endif // INCLUDE_ALL_GCS
1986
1987 void Arguments::set_gc_specific_flags() {
1988 #if INCLUDE_ALL_GCS
1989 // Set per-collector flags
1990 if (UseParallelGC || UseParallelOldGC) {
1991 set_parallel_gc_flags();
1992 } else if (UseConcMarkSweepGC) {
1993 set_cms_and_parnew_gc_flags();
1994 } else if (UseG1GC) {
1995 set_g1_gc_flags();
1996 }
1997 if (AssumeMP && !UseSerialGC) {
1998 if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) {
1999 warning("If the number of processors is expected to increase from one, then"
2000 " you should configure the number of parallel GC threads appropriately"
2001 " using -XX:ParallelGCThreads=N");
2002 }
2003 }
2004 if (MinHeapFreeRatio == 100) {
2005 // Keeping the heap 100% free is hard ;-) so limit it to 99%.
2006 FLAG_SET_ERGO(uintx, MinHeapFreeRatio, 99);
2007 }
2008 #else // INCLUDE_ALL_GCS
2009 assert(verify_serial_gc_flags(), "SerialGC unset");
2010 #endif // INCLUDE_ALL_GCS
2011 }
2012
2013 julong Arguments::limit_by_allocatable_memory(julong limit) {
2014 julong max_allocatable;
2015 julong result = limit;
2016 if (os::has_allocatable_memory_limit(&max_allocatable)) {
2017 result = MIN2(result, max_allocatable / MaxVirtMemFraction);
2018 }
2019 return result;
2020 }
2021
2022 // Use static initialization to get the default before parsing
2023 static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress;
2024
2025 void Arguments::set_heap_size() {
2026 const julong phys_mem =
2027 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM)
2028 : (julong)MaxRAM;
2029
2030 // If the maximum heap size has not been set with -Xmx,
2031 // then set it as fraction of the size of physical memory,
2032 // respecting the maximum and minimum sizes of the heap.
2033 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
2034 julong reasonable_max = phys_mem / MaxRAMFraction;
2035
2036 if (phys_mem <= MaxHeapSize * MinRAMFraction) {
2037 // Small physical memory, so use a minimum fraction of it for the heap
2038 reasonable_max = phys_mem / MinRAMFraction;
2039 } else {
2040 // Not-small physical memory, so require a heap at least
2041 // as large as MaxHeapSize
2042 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize);
2043 }
2044 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) {
2045 // Limit the heap size to ErgoHeapSizeLimit
2046 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit);
2047 }
2048 if (UseCompressedOops) {
2049 // Limit the heap size to the maximum possible when using compressed oops
2050 julong max_coop_heap = (julong)max_heap_for_compressed_oops();
2051
2052 // HeapBaseMinAddress can be greater than default but not less than.
2053 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) {
2054 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) {
2055 // matches compressed oops printing flags
2056 if (PrintCompressedOopsMode || (PrintMiscellaneous && Verbose)) {
2057 jio_fprintf(defaultStream::error_stream(),
2058 "HeapBaseMinAddress must be at least " SIZE_FORMAT
2059 " (" SIZE_FORMAT "G) which is greater than value given "
2060 SIZE_FORMAT "\n",
2061 DefaultHeapBaseMinAddress,
2062 DefaultHeapBaseMinAddress/G,
2063 HeapBaseMinAddress);
2064 }
2065 FLAG_SET_ERGO(size_t, HeapBaseMinAddress, DefaultHeapBaseMinAddress);
2066 }
2067 }
2068
2069 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) {
2070 // Heap should be above HeapBaseMinAddress to get zero based compressed oops
2071 // but it should be not less than default MaxHeapSize.
2072 max_coop_heap -= HeapBaseMinAddress;
2073 }
2074 reasonable_max = MIN2(reasonable_max, max_coop_heap);
2075 }
2076 reasonable_max = limit_by_allocatable_memory(reasonable_max);
2077
2078 if (!FLAG_IS_DEFAULT(InitialHeapSize)) {
2079 // An initial heap size was specified on the command line,
2080 // so be sure that the maximum size is consistent. Done
2081 // after call to limit_by_allocatable_memory because that
2082 // method might reduce the allocation size.
2083 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize);
2084 }
2085
2086 log_trace(gc, heap)(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max);
2087 FLAG_SET_ERGO(size_t, MaxHeapSize, (size_t)reasonable_max);
2088 }
2089
2090 // If the minimum or initial heap_size have not been set or requested to be set
2091 // ergonomically, set them accordingly.
2092 if (InitialHeapSize == 0 || min_heap_size() == 0) {
2093 julong reasonable_minimum = (julong)(OldSize + NewSize);
2094
2095 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize);
2096
2097 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum);
2098
2099 if (InitialHeapSize == 0) {
2100 julong reasonable_initial = phys_mem / InitialRAMFraction;
2101
2102 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size());
2103 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize);
2104
2105 reasonable_initial = limit_by_allocatable_memory(reasonable_initial);
2106
2107 log_trace(gc, heap)(" Initial heap size " SIZE_FORMAT, (size_t)reasonable_initial);
2108 FLAG_SET_ERGO(size_t, InitialHeapSize, (size_t)reasonable_initial);
2109 }
2110 // If the minimum heap size has not been set (via -Xms),
2111 // synchronize with InitialHeapSize to avoid errors with the default value.
2112 if (min_heap_size() == 0) {
2113 set_min_heap_size(MIN2((size_t)reasonable_minimum, InitialHeapSize));
2114 log_trace(gc, heap)(" Minimum heap size " SIZE_FORMAT, min_heap_size());
2115 }
2116 }
2117 }
2118
2119 // This option inspects the machine and attempts to set various
2120 // parameters to be optimal for long-running, memory allocation
2121 // intensive jobs. It is intended for machines with large
2122 // amounts of cpu and memory.
2123 jint Arguments::set_aggressive_heap_flags() {
2124 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit
2125 // VM, but we may not be able to represent the total physical memory
2126 // available (like having 8gb of memory on a box but using a 32bit VM).
2127 // Thus, we need to make sure we're using a julong for intermediate
2128 // calculations.
2129 julong initHeapSize;
2130 julong total_memory = os::physical_memory();
2131
2132 if (total_memory < (julong) 256 * M) {
2133 jio_fprintf(defaultStream::error_stream(),
2134 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n");
2135 vm_exit(1);
2136 }
2137
2138 // The heap size is half of available memory, or (at most)
2139 // all of possible memory less 160mb (leaving room for the OS
2140 // when using ISM). This is the maximum; because adaptive sizing
2141 // is turned on below, the actual space used may be smaller.
2142
2143 initHeapSize = MIN2(total_memory / (julong) 2,
2144 total_memory - (julong) 160 * M);
2145
2146 initHeapSize = limit_by_allocatable_memory(initHeapSize);
2147
2148 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
2149 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, initHeapSize) != Flag::SUCCESS) {
2150 return JNI_EINVAL;
2151 }
2152 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, initHeapSize) != Flag::SUCCESS) {
2153 return JNI_EINVAL;
2154 }
2155 // Currently the minimum size and the initial heap sizes are the same.
2156 set_min_heap_size(initHeapSize);
2157 }
2158 if (FLAG_IS_DEFAULT(NewSize)) {
2159 // Make the young generation 3/8ths of the total heap.
2160 if (FLAG_SET_CMDLINE(size_t, NewSize,
2161 ((julong) MaxHeapSize / (julong) 8) * (julong) 3) != Flag::SUCCESS) {
2162 return JNI_EINVAL;
2163 }
2164 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, NewSize) != Flag::SUCCESS) {
2165 return JNI_EINVAL;
2166 }
2167 }
2168
2169 #if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
2170 FLAG_SET_DEFAULT(UseLargePages, true);
2171 #endif
2172
2173 // Increase some data structure sizes for efficiency
2174 if (FLAG_SET_CMDLINE(size_t, BaseFootPrintEstimate, MaxHeapSize) != Flag::SUCCESS) {
2175 return JNI_EINVAL;
2176 }
2177 if (FLAG_SET_CMDLINE(bool, ResizeTLAB, false) != Flag::SUCCESS) {
2178 return JNI_EINVAL;
2179 }
2180 if (FLAG_SET_CMDLINE(size_t, TLABSize, 256 * K) != Flag::SUCCESS) {
2181 return JNI_EINVAL;
2182 }
2183
2184 // See the OldPLABSize comment below, but replace 'after promotion'
2185 // with 'after copying'. YoungPLABSize is the size of the survivor
2186 // space per-gc-thread buffers. The default is 4kw.
2187 if (FLAG_SET_CMDLINE(size_t, YoungPLABSize, 256 * K) != Flag::SUCCESS) { // Note: this is in words
2188 return JNI_EINVAL;
2189 }
2190
2191 // OldPLABSize is the size of the buffers in the old gen that
2192 // UseParallelGC uses to promote live data that doesn't fit in the
2193 // survivor spaces. At any given time, there's one for each gc thread.
2194 // The default size is 1kw. These buffers are rarely used, since the
2195 // survivor spaces are usually big enough. For specjbb, however, there
2196 // are occasions when there's lots of live data in the young gen
2197 // and we end up promoting some of it. We don't have a definite
2198 // explanation for why bumping OldPLABSize helps, but the theory
2199 // is that a bigger PLAB results in retaining something like the
2200 // original allocation order after promotion, which improves mutator
2201 // locality. A minor effect may be that larger PLABs reduce the
2202 // number of PLAB allocation events during gc. The value of 8kw
2203 // was arrived at by experimenting with specjbb.
2204 if (FLAG_SET_CMDLINE(size_t, OldPLABSize, 8 * K) != Flag::SUCCESS) { // Note: this is in words
2205 return JNI_EINVAL;
2206 }
2207
2208 // Enable parallel GC and adaptive generation sizing
2209 if (FLAG_SET_CMDLINE(bool, UseParallelGC, true) != Flag::SUCCESS) {
2210 return JNI_EINVAL;
2211 }
2212 FLAG_SET_DEFAULT(ParallelGCThreads,
2213 Abstract_VM_Version::parallel_worker_threads());
2214
2215 // Encourage steady state memory management
2216 if (FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100) != Flag::SUCCESS) {
2217 return JNI_EINVAL;
2218 }
2219
2220 // This appears to improve mutator locality
2221 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
2222 return JNI_EINVAL;
2223 }
2224
2225 // Get around early Solaris scheduling bug
2226 // (affinity vs other jobs on system)
2227 // but disallow DR and offlining (5008695).
2228 if (FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true) != Flag::SUCCESS) {
2229 return JNI_EINVAL;
2230 }
2231
2232 return JNI_OK;
2233 }
2234
2235 // This must be called after ergonomics.
2236 void Arguments::set_bytecode_flags() {
2237 if (!RewriteBytecodes) {
2238 FLAG_SET_DEFAULT(RewriteFrequentPairs, false);
2239 }
2240 }
2241
2242 // Aggressive optimization flags -XX:+AggressiveOpts
2243 jint Arguments::set_aggressive_opts_flags() {
2244 #ifdef COMPILER2
2245 if (AggressiveUnboxing) {
2246 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
2247 FLAG_SET_DEFAULT(EliminateAutoBox, true);
2248 } else if (!EliminateAutoBox) {
2249 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled");
2250 AggressiveUnboxing = false;
2251 }
2252 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) {
2253 FLAG_SET_DEFAULT(DoEscapeAnalysis, true);
2254 } else if (!DoEscapeAnalysis) {
2255 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled");
2256 AggressiveUnboxing = false;
2257 }
2258 }
2259 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
2260 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
2261 FLAG_SET_DEFAULT(EliminateAutoBox, true);
2262 }
2263 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
2264 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000);
2265 }
2266
2267 // Feed the cache size setting into the JDK
2268 char buffer[1024];
2269 sprintf(buffer, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax);
2270 if (!add_property(buffer)) {
2271 return JNI_ENOMEM;
2272 }
2273 }
2274 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) {
2275 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500);
2276 }
2277 #endif
2278
2279 if (AggressiveOpts) {
2280 // Sample flag setting code
2281 // if (FLAG_IS_DEFAULT(EliminateZeroing)) {
2282 // FLAG_SET_DEFAULT(EliminateZeroing, true);
2283 // }
2284 }
2285
2286 return JNI_OK;
2287 }
2288
2289 //===========================================================================================================
2290 // Parsing of java.compiler property
2291
2292 void Arguments::process_java_compiler_argument(const char* arg) {
2293 // For backwards compatibility, Djava.compiler=NONE or ""
2294 // causes us to switch to -Xint mode UNLESS -Xdebug
2295 // is also specified.
2296 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) {
2297 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen.
2298 }
2299 }
2300
2301 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) {
2302 _sun_java_launcher = os::strdup_check_oom(launcher);
2303 }
2304
2305 bool Arguments::created_by_java_launcher() {
2306 assert(_sun_java_launcher != NULL, "property must have value");
2307 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0;
2308 }
2309
2310 bool Arguments::sun_java_launcher_is_altjvm() {
2311 return _sun_java_launcher_is_altjvm;
2312 }
2313
2314 //===========================================================================================================
2315 // Parsing of main arguments
2316
2317 #if INCLUDE_JVMCI
2318 // Check consistency of jvmci vm argument settings.
2319 bool Arguments::check_jvmci_args_consistency() {
2320 if (!EnableJVMCI && !JVMCIGlobals::check_jvmci_flags_are_consistent()) {
2321 JVMCIGlobals::print_jvmci_args_inconsistency_error_message();
2322 return false;
2323 }
2324 return true;
2325 }
2326 #endif //INCLUDE_JVMCI
2327
2328 // Check consistency of GC selection
2329 bool Arguments::check_gc_consistency() {
2330 // Ensure that the user has not selected conflicting sets
2331 // of collectors.
2332 uint i = 0;
2333 if (UseSerialGC) i++;
2334 if (UseConcMarkSweepGC) i++;
2335 if (UseParallelGC || UseParallelOldGC) i++;
2336 if (UseG1GC) i++;
2337 if (i > 1) {
2338 jio_fprintf(defaultStream::error_stream(),
2339 "Conflicting collector combinations in option list; "
2340 "please refer to the release notes for the combinations "
2341 "allowed\n");
2342 return false;
2343 }
2344
2345 if (UseConcMarkSweepGC && !UseParNewGC) {
2346 jio_fprintf(defaultStream::error_stream(),
2347 "It is not possible to combine the DefNew young collector with the CMS collector.\n");
2348 return false;
2349 }
2350
2351 if (UseParNewGC && !UseConcMarkSweepGC) {
2352 jio_fprintf(defaultStream::error_stream(),
2353 "It is not possible to combine the ParNew young collector with any collector other than CMS.\n");
2354 return false;
2355 }
2356
2357 return true;
2358 }
2359
2360 // Check the consistency of vm_init_args
2361 bool Arguments::check_vm_args_consistency() {
2362 // Method for adding checks for flag consistency.
2363 // The intent is to warn the user of all possible conflicts,
2364 // before returning an error.
2365 // Note: Needs platform-dependent factoring.
2366 bool status = true;
2367
2368 if (TLABRefillWasteFraction == 0) {
2369 jio_fprintf(defaultStream::error_stream(),
2370 "TLABRefillWasteFraction should be a denominator, "
2371 "not " SIZE_FORMAT "\n",
2372 TLABRefillWasteFraction);
2373 status = false;
2374 }
2375
2376 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) {
2377 MarkSweepAlwaysCompactCount = 1; // Move objects every gc.
2378 }
2379
2380 if (!(UseParallelGC || UseParallelOldGC) && FLAG_IS_DEFAULT(ScavengeBeforeFullGC)) {
2381 FLAG_SET_DEFAULT(ScavengeBeforeFullGC, false);
2382 }
2383
2384 if (GCTimeLimit == 100) {
2385 // Turn off gc-overhead-limit-exceeded checks
2386 FLAG_SET_DEFAULT(UseGCOverheadLimit, false);
2387 }
2388
2389 status = status && check_gc_consistency();
2390
2391 // CMS space iteration, which FLSVerifyAllHeapreferences entails,
2392 // insists that we hold the requisite locks so that the iteration is
2393 // MT-safe. For the verification at start-up and shut-down, we don't
2394 // yet have a good way of acquiring and releasing these locks,
2395 // which are not visible at the CollectedHeap level. We want to
2396 // be able to acquire these locks and then do the iteration rather
2397 // than just disable the lock verification. This will be fixed under
2398 // bug 4788986.
2399 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) {
2400 if (VerifyDuringStartup) {
2401 warning("Heap verification at start-up disabled "
2402 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
2403 VerifyDuringStartup = false; // Disable verification at start-up
2404 }
2405
2406 if (VerifyBeforeExit) {
2407 warning("Heap verification at shutdown disabled "
2408 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
2409 VerifyBeforeExit = false; // Disable verification at shutdown
2410 }
2411 }
2412
2413 if (PrintNMTStatistics) {
2414 #if INCLUDE_NMT
2415 if (MemTracker::tracking_level() == NMT_off) {
2416 #endif // INCLUDE_NMT
2417 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled");
2418 PrintNMTStatistics = false;
2419 #if INCLUDE_NMT
2420 }
2421 #endif
2422 }
2423 #if INCLUDE_JVMCI
2424
2425 status = status && check_jvmci_args_consistency();
2426
2427 if (EnableJVMCI) {
2428 if (!ScavengeRootsInCode) {
2429 warning("forcing ScavengeRootsInCode non-zero because JVMCI is enabled");
2430 ScavengeRootsInCode = 1;
2431 }
2432 if (FLAG_IS_DEFAULT(TypeProfileLevel)) {
2433 TypeProfileLevel = 0;
2434 }
2435 if (UseJVMCICompiler) {
2436 if (FLAG_IS_DEFAULT(TypeProfileWidth)) {
2437 TypeProfileWidth = 8;
2438 }
2439 }
2440 }
2441 #endif
2442
2443 // Check lower bounds of the code cache
2444 // Template Interpreter code is approximately 3X larger in debug builds.
2445 uint min_code_cache_size = CodeCacheMinimumUseSpace DEBUG_ONLY(* 3);
2446 if (InitialCodeCacheSize < (uintx)os::vm_page_size()) {
2447 jio_fprintf(defaultStream::error_stream(),
2448 "Invalid InitialCodeCacheSize=%dK. Must be at least %dK.\n", InitialCodeCacheSize/K,
2449 os::vm_page_size()/K);
2450 status = false;
2451 } else if (ReservedCodeCacheSize < InitialCodeCacheSize) {
2452 jio_fprintf(defaultStream::error_stream(),
2453 "Invalid ReservedCodeCacheSize: %dK. Must be at least InitialCodeCacheSize=%dK.\n",
2454 ReservedCodeCacheSize/K, InitialCodeCacheSize/K);
2455 status = false;
2456 } else if (ReservedCodeCacheSize < min_code_cache_size) {
2457 jio_fprintf(defaultStream::error_stream(),
2458 "Invalid ReservedCodeCacheSize=%dK. Must be at least %uK.\n", ReservedCodeCacheSize/K,
2459 min_code_cache_size/K);
2460 status = false;
2461 } else if (ReservedCodeCacheSize > CODE_CACHE_SIZE_LIMIT) {
2462 // Code cache size larger than CODE_CACHE_SIZE_LIMIT is not supported.
2463 jio_fprintf(defaultStream::error_stream(),
2464 "Invalid ReservedCodeCacheSize=%dM. Must be at most %uM.\n", ReservedCodeCacheSize/M,
2465 CODE_CACHE_SIZE_LIMIT/M);
2466 status = false;
2467 } else if (NonNMethodCodeHeapSize < min_code_cache_size) {
2468 jio_fprintf(defaultStream::error_stream(),
2469 "Invalid NonNMethodCodeHeapSize=%dK. Must be at least %uK.\n", NonNMethodCodeHeapSize/K,
2470 min_code_cache_size/K);
2471 status = false;
2472 }
2473
2474 if (!FLAG_IS_DEFAULT(CICompilerCount) && !FLAG_IS_DEFAULT(CICompilerCountPerCPU) && CICompilerCountPerCPU) {
2475 warning("The VM option CICompilerCountPerCPU overrides CICompilerCount.");
2476 }
2477
2478 #ifndef SUPPORT_RESERVED_STACK_AREA
2479 if (StackReservedPages != 0) {
2480 FLAG_SET_CMDLINE(intx, StackReservedPages, 0);
2481 warning("Reserved Stack Area not supported on this platform");
2482 }
2483 #endif
2484 return status;
2485 }
2486
2487 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore,
2488 const char* option_type) {
2489 if (ignore) return false;
2490
2491 const char* spacer = " ";
2492 if (option_type == NULL) {
2493 option_type = ++spacer; // Set both to the empty string.
2494 }
2495
2496 if (os::obsolete_option(option)) {
2497 jio_fprintf(defaultStream::error_stream(),
2498 "Obsolete %s%soption: %s\n", option_type, spacer,
2499 option->optionString);
2500 return false;
2501 } else {
2502 jio_fprintf(defaultStream::error_stream(),
2503 "Unrecognized %s%soption: %s\n", option_type, spacer,
2504 option->optionString);
2505 return true;
2506 }
2507 }
2508
2509 static const char* user_assertion_options[] = {
2510 "-da", "-ea", "-disableassertions", "-enableassertions", 0
2511 };
2512
2513 static const char* system_assertion_options[] = {
2514 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0
2515 };
2516
2517 bool Arguments::parse_uintx(const char* value,
2518 uintx* uintx_arg,
2519 uintx min_size) {
2520
2521 // Check the sign first since atomull() parses only unsigned values.
2522 bool value_is_positive = !(*value == '-');
2523
2524 if (value_is_positive) {
2525 julong n;
2526 bool good_return = atomull(value, &n);
2527 if (good_return) {
2528 bool above_minimum = n >= min_size;
2529 bool value_is_too_large = n > max_uintx;
2530
2531 if (above_minimum && !value_is_too_large) {
2532 *uintx_arg = n;
2533 return true;
2534 }
2535 }
2536 }
2537 return false;
2538 }
2539
2540 Arguments::ArgsRange Arguments::parse_memory_size(const char* s,
2541 julong* long_arg,
2542 julong min_size) {
2543 if (!atomull(s, long_arg)) return arg_unreadable;
2544 return check_memory_size(*long_arg, min_size);
2545 }
2546
2547 // Parse JavaVMInitArgs structure
2548
2549 jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args,
2550 const JavaVMInitArgs *java_options_args,
2551 const JavaVMInitArgs *cmd_line_args) {
2552 // For components of the system classpath.
2553 SysClassPath scp(Arguments::get_sysclasspath());
2554 bool scp_assembly_required = false;
2555
2556 // Save default settings for some mode flags
2557 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
2558 Arguments::_UseOnStackReplacement = UseOnStackReplacement;
2559 Arguments::_ClipInlining = ClipInlining;
2560 Arguments::_BackgroundCompilation = BackgroundCompilation;
2561 if (TieredCompilation) {
2562 Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
2563 Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
2564 }
2565
2566 // Setup flags for mixed which is the default
2567 set_mode_flags(_mixed);
2568
2569 // Parse args structure generated from JAVA_TOOL_OPTIONS environment
2570 // variable (if present).
2571 jint result = parse_each_vm_init_arg(
2572 java_tool_options_args, &scp, &scp_assembly_required, Flag::ENVIRON_VAR);
2573 if (result != JNI_OK) {
2574 return result;
2575 }
2576
2577 // Parse args structure generated from the command line flags.
2578 result = parse_each_vm_init_arg(cmd_line_args, &scp, &scp_assembly_required,
2579 Flag::COMMAND_LINE);
2580 if (result != JNI_OK) {
2581 return result;
2582 }
2583
2584 // Parse args structure generated from the _JAVA_OPTIONS environment
2585 // variable (if present) (mimics classic VM)
2586 result = parse_each_vm_init_arg(
2587 java_options_args, &scp, &scp_assembly_required, Flag::ENVIRON_VAR);
2588 if (result != JNI_OK) {
2589 return result;
2590 }
2591
2592 // Do final processing now that all arguments have been parsed
2593 result = finalize_vm_init_args(&scp, scp_assembly_required);
2594 if (result != JNI_OK) {
2595 return result;
2596 }
2597
2598 return JNI_OK;
2599 }
2600
2601 // Checks if name in command-line argument -agent{lib,path}:name[=options]
2602 // represents a valid JDWP agent. is_path==true denotes that we
2603 // are dealing with -agentpath (case where name is a path), otherwise with
2604 // -agentlib
2605 bool valid_jdwp_agent(char *name, bool is_path) {
2606 char *_name;
2607 const char *_jdwp = "jdwp";
2608 size_t _len_jdwp, _len_prefix;
2609
2610 if (is_path) {
2611 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) {
2612 return false;
2613 }
2614
2615 _name++; // skip past last path separator
2616 _len_prefix = strlen(JNI_LIB_PREFIX);
2617
2618 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) {
2619 return false;
2620 }
2621
2622 _name += _len_prefix;
2623 _len_jdwp = strlen(_jdwp);
2624
2625 if (strncmp(_name, _jdwp, _len_jdwp) == 0) {
2626 _name += _len_jdwp;
2627 }
2628 else {
2629 return false;
2630 }
2631
2632 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) {
2633 return false;
2634 }
2635
2636 return true;
2637 }
2638
2639 if (strcmp(name, _jdwp) == 0) {
2640 return true;
2641 }
2642
2643 return false;
2644 }
2645
2646 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args,
2647 SysClassPath* scp_p,
2648 bool* scp_assembly_required_p,
2649 Flag::Flags origin) {
2650 // For match_option to return remaining or value part of option string
2651 const char* tail;
2652
2653 // iterate over arguments
2654 for (int index = 0; index < args->nOptions; index++) {
2655 bool is_absolute_path = false; // for -agentpath vs -agentlib
2656
2657 const JavaVMOption* option = args->options + index;
2658
2659 if (!match_option(option, "-Djava.class.path", &tail) &&
2660 !match_option(option, "-Dsun.java.command", &tail) &&
2661 !match_option(option, "-Dsun.java.launcher", &tail)) {
2662
2663 // add all jvm options to the jvm_args string. This string
2664 // is used later to set the java.vm.args PerfData string constant.
2665 // the -Djava.class.path and the -Dsun.java.command options are
2666 // omitted from jvm_args string as each have their own PerfData
2667 // string constant object.
2668 build_jvm_args(option->optionString);
2669 }
2670
2671 // -verbose:[class/gc/jni]
2672 if (match_option(option, "-verbose", &tail)) {
2673 if (!strcmp(tail, ":class") || !strcmp(tail, "")) {
2674 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(classload));
2675 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(classunload));
2676 } else if (!strcmp(tail, ":gc")) {
2677 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
2678 } else if (!strcmp(tail, ":jni")) {
2679 if (FLAG_SET_CMDLINE(bool, PrintJNIResolving, true) != Flag::SUCCESS) {
2680 return JNI_EINVAL;
2681 }
2682 }
2683 // -da / -ea / -disableassertions / -enableassertions
2684 // These accept an optional class/package name separated by a colon, e.g.,
2685 // -da:java.lang.Thread.
2686 } else if (match_option(option, user_assertion_options, &tail, true)) {
2687 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2688 if (*tail == '\0') {
2689 JavaAssertions::setUserClassDefault(enable);
2690 } else {
2691 assert(*tail == ':', "bogus match by match_option()");
2692 JavaAssertions::addOption(tail + 1, enable);
2693 }
2694 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions
2695 } else if (match_option(option, system_assertion_options, &tail, false)) {
2696 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2697 JavaAssertions::setSystemClassDefault(enable);
2698 // -bootclasspath:
2699 } else if (match_option(option, "-Xbootclasspath:", &tail)) {
2700 scp_p->reset_path(tail);
2701 *scp_assembly_required_p = true;
2702 // -bootclasspath/a:
2703 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) {
2704 scp_p->add_suffix(tail);
2705 *scp_assembly_required_p = true;
2706 // -bootclasspath/p:
2707 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) {
2708 scp_p->add_prefix(tail);
2709 *scp_assembly_required_p = true;
2710 // -Xrun
2711 } else if (match_option(option, "-Xrun", &tail)) {
2712 if (tail != NULL) {
2713 const char* pos = strchr(tail, ':');
2714 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2715 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len);
2716 name[len] = '\0';
2717
2718 char *options = NULL;
2719 if(pos != NULL) {
2720 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied.
2721 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtInternal), pos+1, len2);
2722 }
2723 #if !INCLUDE_JVMTI
2724 if (strcmp(name, "jdwp") == 0) {
2725 jio_fprintf(defaultStream::error_stream(),
2726 "Debugging agents are not supported in this VM\n");
2727 return JNI_ERR;
2728 }
2729 #endif // !INCLUDE_JVMTI
2730 add_init_library(name, options);
2731 }
2732 // -agentlib and -agentpath
2733 } else if (match_option(option, "-agentlib:", &tail) ||
2734 (is_absolute_path = match_option(option, "-agentpath:", &tail))) {
2735 if(tail != NULL) {
2736 const char* pos = strchr(tail, '=');
2737 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2738 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len);
2739 name[len] = '\0';
2740
2741 char *options = NULL;
2742 if(pos != NULL) {
2743 options = os::strdup_check_oom(pos + 1, mtInternal);
2744 }
2745 #if !INCLUDE_JVMTI
2746 if (valid_jdwp_agent(name, is_absolute_path)) {
2747 jio_fprintf(defaultStream::error_stream(),
2748 "Debugging agents are not supported in this VM\n");
2749 return JNI_ERR;
2750 }
2751 #endif // !INCLUDE_JVMTI
2752 add_init_agent(name, options, is_absolute_path);
2753 }
2754 // -javaagent
2755 } else if (match_option(option, "-javaagent:", &tail)) {
2756 #if !INCLUDE_JVMTI
2757 jio_fprintf(defaultStream::error_stream(),
2758 "Instrumentation agents are not supported in this VM\n");
2759 return JNI_ERR;
2760 #else
2761 if(tail != NULL) {
2762 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1, mtInternal), tail);
2763 add_init_agent("instrument", options, false);
2764 }
2765 #endif // !INCLUDE_JVMTI
2766 // -Xnoclassgc
2767 } else if (match_option(option, "-Xnoclassgc")) {
2768 if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != Flag::SUCCESS) {
2769 return JNI_EINVAL;
2770 }
2771 // -Xconcgc
2772 } else if (match_option(option, "-Xconcgc")) {
2773 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true) != Flag::SUCCESS) {
2774 return JNI_EINVAL;
2775 }
2776 // -Xnoconcgc
2777 } else if (match_option(option, "-Xnoconcgc")) {
2778 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false) != Flag::SUCCESS) {
2779 return JNI_EINVAL;
2780 }
2781 // -Xbatch
2782 } else if (match_option(option, "-Xbatch")) {
2783 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
2784 return JNI_EINVAL;
2785 }
2786 // -Xmn for compatibility with other JVM vendors
2787 } else if (match_option(option, "-Xmn", &tail)) {
2788 julong long_initial_young_size = 0;
2789 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1);
2790 if (errcode != arg_in_range) {
2791 jio_fprintf(defaultStream::error_stream(),
2792 "Invalid initial young generation size: %s\n", option->optionString);
2793 describe_range_error(errcode);
2794 return JNI_EINVAL;
2795 }
2796 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
2797 return JNI_EINVAL;
2798 }
2799 if (FLAG_SET_CMDLINE(size_t, NewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
2800 return JNI_EINVAL;
2801 }
2802 // -Xms
2803 } else if (match_option(option, "-Xms", &tail)) {
2804 julong long_initial_heap_size = 0;
2805 // an initial heap size of 0 means automatically determine
2806 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0);
2807 if (errcode != arg_in_range) {
2808 jio_fprintf(defaultStream::error_stream(),
2809 "Invalid initial heap size: %s\n", option->optionString);
2810 describe_range_error(errcode);
2811 return JNI_EINVAL;
2812 }
2813 set_min_heap_size((size_t)long_initial_heap_size);
2814 // Currently the minimum size and the initial heap sizes are the same.
2815 // Can be overridden with -XX:InitialHeapSize.
2816 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, (size_t)long_initial_heap_size) != Flag::SUCCESS) {
2817 return JNI_EINVAL;
2818 }
2819 // -Xmx
2820 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) {
2821 julong long_max_heap_size = 0;
2822 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1);
2823 if (errcode != arg_in_range) {
2824 jio_fprintf(defaultStream::error_stream(),
2825 "Invalid maximum heap size: %s\n", option->optionString);
2826 describe_range_error(errcode);
2827 return JNI_EINVAL;
2828 }
2829 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, (size_t)long_max_heap_size) != Flag::SUCCESS) {
2830 return JNI_EINVAL;
2831 }
2832 // Xmaxf
2833 } else if (match_option(option, "-Xmaxf", &tail)) {
2834 char* err;
2835 int maxf = (int)(strtod(tail, &err) * 100);
2836 if (*err != '\0' || *tail == '\0') {
2837 jio_fprintf(defaultStream::error_stream(),
2838 "Bad max heap free percentage size: %s\n",
2839 option->optionString);
2840 return JNI_EINVAL;
2841 } else {
2842 if (FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf) != Flag::SUCCESS) {
2843 return JNI_EINVAL;
2844 }
2845 }
2846 // Xminf
2847 } else if (match_option(option, "-Xminf", &tail)) {
2848 char* err;
2849 int minf = (int)(strtod(tail, &err) * 100);
2850 if (*err != '\0' || *tail == '\0') {
2851 jio_fprintf(defaultStream::error_stream(),
2852 "Bad min heap free percentage size: %s\n",
2853 option->optionString);
2854 return JNI_EINVAL;
2855 } else {
2856 if (FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf) != Flag::SUCCESS) {
2857 return JNI_EINVAL;
2858 }
2859 }
2860 // -Xss
2861 } else if (match_option(option, "-Xss", &tail)) {
2862 julong long_ThreadStackSize = 0;
2863 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000);
2864 if (errcode != arg_in_range) {
2865 jio_fprintf(defaultStream::error_stream(),
2866 "Invalid thread stack size: %s\n", option->optionString);
2867 describe_range_error(errcode);
2868 return JNI_EINVAL;
2869 }
2870 // Internally track ThreadStackSize in units of 1024 bytes.
2871 if (FLAG_SET_CMDLINE(intx, ThreadStackSize,
2872 round_to((int)long_ThreadStackSize, K) / K) != Flag::SUCCESS) {
2873 return JNI_EINVAL;
2874 }
2875 // -Xoss, -Xsqnopause, -Xoptimize, -Xboundthreads, -Xusealtsigs
2876 } else if (match_option(option, "-Xoss", &tail) ||
2877 match_option(option, "-Xsqnopause") ||
2878 match_option(option, "-Xoptimize") ||
2879 match_option(option, "-Xboundthreads") ||
2880 match_option(option, "-Xusealtsigs")) {
2881 // All these options are deprecated in JDK 9 and will be removed in a future release
2882 char version[256];
2883 JDK_Version::jdk(9).to_string(version, sizeof(version));
2884 warning("Ignoring option %s; support was removed in %s", option->optionString, version);
2885 } else if (match_option(option, "-XX:CodeCacheExpansionSize=", &tail)) {
2886 julong long_CodeCacheExpansionSize = 0;
2887 ArgsRange errcode = parse_memory_size(tail, &long_CodeCacheExpansionSize, os::vm_page_size());
2888 if (errcode != arg_in_range) {
2889 jio_fprintf(defaultStream::error_stream(),
2890 "Invalid argument: %s. Must be at least %luK.\n", option->optionString,
2891 os::vm_page_size()/K);
2892 return JNI_EINVAL;
2893 }
2894 if (FLAG_SET_CMDLINE(uintx, CodeCacheExpansionSize, (uintx)long_CodeCacheExpansionSize) != Flag::SUCCESS) {
2895 return JNI_EINVAL;
2896 }
2897 } else if (match_option(option, "-Xmaxjitcodesize", &tail) ||
2898 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) {
2899 julong long_ReservedCodeCacheSize = 0;
2900
2901 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1);
2902 if (errcode != arg_in_range) {
2903 jio_fprintf(defaultStream::error_stream(),
2904 "Invalid maximum code cache size: %s.\n", option->optionString);
2905 return JNI_EINVAL;
2906 }
2907 if (FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != Flag::SUCCESS) {
2908 return JNI_EINVAL;
2909 }
2910 // -XX:NonNMethodCodeHeapSize=
2911 } else if (match_option(option, "-XX:NonNMethodCodeHeapSize=", &tail)) {
2912 julong long_NonNMethodCodeHeapSize = 0;
2913
2914 ArgsRange errcode = parse_memory_size(tail, &long_NonNMethodCodeHeapSize, 1);
2915 if (errcode != arg_in_range) {
2916 jio_fprintf(defaultStream::error_stream(),
2917 "Invalid maximum non-nmethod code heap size: %s.\n", option->optionString);
2918 return JNI_EINVAL;
2919 }
2920 if (FLAG_SET_CMDLINE(uintx, NonNMethodCodeHeapSize, (uintx)long_NonNMethodCodeHeapSize) != Flag::SUCCESS) {
2921 return JNI_EINVAL;
2922 }
2923 // -XX:ProfiledCodeHeapSize=
2924 } else if (match_option(option, "-XX:ProfiledCodeHeapSize=", &tail)) {
2925 julong long_ProfiledCodeHeapSize = 0;
2926
2927 ArgsRange errcode = parse_memory_size(tail, &long_ProfiledCodeHeapSize, 1);
2928 if (errcode != arg_in_range) {
2929 jio_fprintf(defaultStream::error_stream(),
2930 "Invalid maximum profiled code heap size: %s.\n", option->optionString);
2931 return JNI_EINVAL;
2932 }
2933 if (FLAG_SET_CMDLINE(uintx, ProfiledCodeHeapSize, (uintx)long_ProfiledCodeHeapSize) != Flag::SUCCESS) {
2934 return JNI_EINVAL;
2935 }
2936 // -XX:NonProfiledCodeHeapSizee=
2937 } else if (match_option(option, "-XX:NonProfiledCodeHeapSize=", &tail)) {
2938 julong long_NonProfiledCodeHeapSize = 0;
2939
2940 ArgsRange errcode = parse_memory_size(tail, &long_NonProfiledCodeHeapSize, 1);
2941 if (errcode != arg_in_range) {
2942 jio_fprintf(defaultStream::error_stream(),
2943 "Invalid maximum non-profiled code heap size: %s.\n", option->optionString);
2944 return JNI_EINVAL;
2945 }
2946 if (FLAG_SET_CMDLINE(uintx, NonProfiledCodeHeapSize, (uintx)long_NonProfiledCodeHeapSize) != Flag::SUCCESS) {
2947 return JNI_EINVAL;
2948 }
2949 // -green
2950 } else if (match_option(option, "-green")) {
2951 jio_fprintf(defaultStream::error_stream(),
2952 "Green threads support not available\n");
2953 return JNI_EINVAL;
2954 // -native
2955 } else if (match_option(option, "-native")) {
2956 // HotSpot always uses native threads, ignore silently for compatibility
2957 // -Xrs
2958 } else if (match_option(option, "-Xrs")) {
2959 // Classic/EVM option, new functionality
2960 if (FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true) != Flag::SUCCESS) {
2961 return JNI_EINVAL;
2962 }
2963 // -Xprof
2964 } else if (match_option(option, "-Xprof")) {
2965 #if INCLUDE_FPROF
2966 _has_profile = true;
2967 #else // INCLUDE_FPROF
2968 jio_fprintf(defaultStream::error_stream(),
2969 "Flat profiling is not supported in this VM.\n");
2970 return JNI_ERR;
2971 #endif // INCLUDE_FPROF
2972 // -Xconcurrentio
2973 } else if (match_option(option, "-Xconcurrentio")) {
2974 if (FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true) != Flag::SUCCESS) {
2975 return JNI_EINVAL;
2976 }
2977 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
2978 return JNI_EINVAL;
2979 }
2980 if (FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1) != Flag::SUCCESS) {
2981 return JNI_EINVAL;
2982 }
2983 if (FLAG_SET_CMDLINE(bool, UseTLAB, false) != Flag::SUCCESS) {
2984 return JNI_EINVAL;
2985 }
2986 if (FLAG_SET_CMDLINE(size_t, NewSizeThreadIncrease, 16 * K) != Flag::SUCCESS) { // 20Kb per thread added to new generation
2987 return JNI_EINVAL;
2988 }
2989
2990 // -Xinternalversion
2991 } else if (match_option(option, "-Xinternalversion")) {
2992 jio_fprintf(defaultStream::output_stream(), "%s\n",
2993 VM_Version::internal_vm_info_string());
2994 vm_exit(0);
2995 #ifndef PRODUCT
2996 // -Xprintflags
2997 } else if (match_option(option, "-Xprintflags")) {
2998 CommandLineFlags::printFlags(tty, false);
2999 vm_exit(0);
3000 #endif
3001 // -D
3002 } else if (match_option(option, "-D", &tail)) {
3003 const char* value;
3004 if (match_option(option, "-Djava.endorsed.dirs=", &value) &&
3005 *value!= '\0' && strcmp(value, "\"\"") != 0) {
3006 // abort if -Djava.endorsed.dirs is set
3007 jio_fprintf(defaultStream::output_stream(),
3008 "-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n"
3009 "in modular form will be supported via the concept of upgradeable modules.\n", value);
3010 return JNI_EINVAL;
3011 }
3012 if (match_option(option, "-Djava.ext.dirs=", &value) &&
3013 *value != '\0' && strcmp(value, "\"\"") != 0) {
3014 // abort if -Djava.ext.dirs is set
3015 jio_fprintf(defaultStream::output_stream(),
3016 "-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value);
3017 return JNI_EINVAL;
3018 }
3019
3020 if (!add_property(tail)) {
3021 return JNI_ENOMEM;
3022 }
3023 // Out of the box management support
3024 if (match_option(option, "-Dcom.sun.management", &tail)) {
3025 #if INCLUDE_MANAGEMENT
3026 if (FLAG_SET_CMDLINE(bool, ManagementServer, true) != Flag::SUCCESS) {
3027 return JNI_EINVAL;
3028 }
3029 #else
3030 jio_fprintf(defaultStream::output_stream(),
3031 "-Dcom.sun.management is not supported in this VM.\n");
3032 return JNI_ERR;
3033 #endif
3034 }
3035 // -Xint
3036 } else if (match_option(option, "-Xint")) {
3037 set_mode_flags(_int);
3038 // -Xmixed
3039 } else if (match_option(option, "-Xmixed")) {
3040 set_mode_flags(_mixed);
3041 // -Xcomp
3042 } else if (match_option(option, "-Xcomp")) {
3043 // for testing the compiler; turn off all flags that inhibit compilation
3044 set_mode_flags(_comp);
3045 // -Xshare:dump
3046 } else if (match_option(option, "-Xshare:dump")) {
3047 if (FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true) != Flag::SUCCESS) {
3048 return JNI_EINVAL;
3049 }
3050 set_mode_flags(_int); // Prevent compilation, which creates objects
3051 // -Xshare:on
3052 } else if (match_option(option, "-Xshare:on")) {
3053 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
3054 return JNI_EINVAL;
3055 }
3056 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
3057 return JNI_EINVAL;
3058 }
3059 // -Xshare:auto
3060 } else if (match_option(option, "-Xshare:auto")) {
3061 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
3062 return JNI_EINVAL;
3063 }
3064 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
3065 return JNI_EINVAL;
3066 }
3067 // -Xshare:off
3068 } else if (match_option(option, "-Xshare:off")) {
3069 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, false) != Flag::SUCCESS) {
3070 return JNI_EINVAL;
3071 }
3072 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
3073 return JNI_EINVAL;
3074 }
3075 // -Xverify
3076 } else if (match_option(option, "-Xverify", &tail)) {
3077 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) {
3078 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true) != Flag::SUCCESS) {
3079 return JNI_EINVAL;
3080 }
3081 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
3082 return JNI_EINVAL;
3083 }
3084 } else if (strcmp(tail, ":remote") == 0) {
3085 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
3086 return JNI_EINVAL;
3087 }
3088 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
3089 return JNI_EINVAL;
3090 }
3091 } else if (strcmp(tail, ":none") == 0) {
3092 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
3093 return JNI_EINVAL;
3094 }
3095 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false) != Flag::SUCCESS) {
3096 return JNI_EINVAL;
3097 }
3098 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) {
3099 return JNI_EINVAL;
3100 }
3101 // -Xdebug
3102 } else if (match_option(option, "-Xdebug")) {
3103 // note this flag has been used, then ignore
3104 set_xdebug_mode(true);
3105 // -Xnoagent
3106 } else if (match_option(option, "-Xnoagent")) {
3107 // For compatibility with classic. HotSpot refuses to load the old style agent.dll.
3108 } else if (match_option(option, "-Xloggc:", &tail)) {
3109 // Deprecated flag to redirect GC output to a file. -Xloggc:<filename>
3110 log_warning(gc)("-Xloggc is deprecated. Will use -Xlog:gc:%s instead.", tail);
3111 _gc_log_filename = os::strdup_check_oom(tail);
3112 } else if (match_option(option, "-Xlog", &tail)) {
3113 bool ret = false;
3114 if (strcmp(tail, ":help") == 0) {
3115 LogConfiguration::print_command_line_help(defaultStream::output_stream());
3116 vm_exit(0);
3117 } else if (strcmp(tail, ":disable") == 0) {
3118 LogConfiguration::disable_logging();
3119 ret = true;
3120 } else if (*tail == '\0') {
3121 ret = LogConfiguration::parse_command_line_arguments();
3122 assert(ret, "-Xlog without arguments should never fail to parse");
3123 } else if (*tail == ':') {
3124 ret = LogConfiguration::parse_command_line_arguments(tail + 1);
3125 }
3126 if (ret == false) {
3127 jio_fprintf(defaultStream::error_stream(),
3128 "Invalid -Xlog option '-Xlog%s'\n",
3129 tail);
3130 return JNI_EINVAL;
3131 }
3132 // JNI hooks
3133 } else if (match_option(option, "-Xcheck", &tail)) {
3134 if (!strcmp(tail, ":jni")) {
3135 #if !INCLUDE_JNI_CHECK
3136 warning("JNI CHECKING is not supported in this VM");
3137 #else
3138 CheckJNICalls = true;
3139 #endif // INCLUDE_JNI_CHECK
3140 } else if (is_bad_option(option, args->ignoreUnrecognized,
3141 "check")) {
3142 return JNI_EINVAL;
3143 }
3144 } else if (match_option(option, "vfprintf")) {
3145 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo);
3146 } else if (match_option(option, "exit")) {
3147 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo);
3148 } else if (match_option(option, "abort")) {
3149 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo);
3150 // -XX:+AggressiveHeap
3151 } else if (match_option(option, "-XX:+AggressiveHeap")) {
3152 jint result = set_aggressive_heap_flags();
3153 if (result != JNI_OK) {
3154 return result;
3155 }
3156 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure;
3157 // and the last option wins.
3158 } else if (match_option(option, "-XX:+NeverTenure")) {
3159 if (FLAG_SET_CMDLINE(bool, NeverTenure, true) != Flag::SUCCESS) {
3160 return JNI_EINVAL;
3161 }
3162 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
3163 return JNI_EINVAL;
3164 }
3165 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1) != Flag::SUCCESS) {
3166 return JNI_EINVAL;
3167 }
3168 } else if (match_option(option, "-XX:+AlwaysTenure")) {
3169 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3170 return JNI_EINVAL;
3171 }
3172 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
3173 return JNI_EINVAL;
3174 }
3175 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0) != Flag::SUCCESS) {
3176 return JNI_EINVAL;
3177 }
3178 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) {
3179 uintx max_tenuring_thresh = 0;
3180 if (!parse_uintx(tail, &max_tenuring_thresh, 0)) {
3181 jio_fprintf(defaultStream::error_stream(),
3182 "Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail);
3183 return JNI_EINVAL;
3184 }
3185
3186 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh) != Flag::SUCCESS) {
3187 return JNI_EINVAL;
3188 }
3189
3190 if (MaxTenuringThreshold == 0) {
3191 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3192 return JNI_EINVAL;
3193 }
3194 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
3195 return JNI_EINVAL;
3196 }
3197 } else {
3198 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3199 return JNI_EINVAL;
3200 }
3201 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
3202 return JNI_EINVAL;
3203 }
3204 }
3205 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) {
3206 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false) != Flag::SUCCESS) {
3207 return JNI_EINVAL;
3208 }
3209 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true) != Flag::SUCCESS) {
3210 return JNI_EINVAL;
3211 }
3212 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) {
3213 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false) != Flag::SUCCESS) {
3214 return JNI_EINVAL;
3215 }
3216 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true) != Flag::SUCCESS) {
3217 return JNI_EINVAL;
3218 }
3219 } else if (match_option(option, "-XX:+ExtendedDTraceProbes")) {
3220 #if defined(DTRACE_ENABLED)
3221 if (FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true) != Flag::SUCCESS) {
3222 return JNI_EINVAL;
3223 }
3224 if (FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true) != Flag::SUCCESS) {
3225 return JNI_EINVAL;
3226 }
3227 if (FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true) != Flag::SUCCESS) {
3228 return JNI_EINVAL;
3229 }
3230 if (FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true) != Flag::SUCCESS) {
3231 return JNI_EINVAL;
3232 }
3233 #else // defined(DTRACE_ENABLED)
3234 jio_fprintf(defaultStream::error_stream(),
3235 "ExtendedDTraceProbes flag is not applicable for this configuration\n");
3236 return JNI_EINVAL;
3237 #endif // defined(DTRACE_ENABLED)
3238 #ifdef ASSERT
3239 } else if (match_option(option, "-XX:+FullGCALot")) {
3240 if (FLAG_SET_CMDLINE(bool, FullGCALot, true) != Flag::SUCCESS) {
3241 return JNI_EINVAL;
3242 }
3243 // disable scavenge before parallel mark-compact
3244 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
3245 return JNI_EINVAL;
3246 }
3247 #endif
3248 #if !INCLUDE_MANAGEMENT
3249 } else if (match_option(option, "-XX:+ManagementServer")) {
3250 jio_fprintf(defaultStream::error_stream(),
3251 "ManagementServer is not supported in this VM.\n");
3252 return JNI_ERR;
3253 #endif // INCLUDE_MANAGEMENT
3254 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx
3255 // Skip -XX:Flags= and -XX:VMOptionsFile= since those cases have
3256 // already been handled
3257 if ((strncmp(tail, "Flags=", strlen("Flags=")) != 0) &&
3258 (strncmp(tail, "VMOptionsFile=", strlen("VMOptionsFile=")) != 0)) {
3259 if (!process_argument(tail, args->ignoreUnrecognized, origin)) {
3260 return JNI_EINVAL;
3261 }
3262 }
3263 // Unknown option
3264 } else if (is_bad_option(option, args->ignoreUnrecognized)) {
3265 return JNI_ERR;
3266 }
3267 }
3268
3269 // PrintSharedArchiveAndExit will turn on
3270 // -Xshare:on
3271 // -XX:+TraceClassPaths
3272 if (PrintSharedArchiveAndExit) {
3273 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
3274 return JNI_EINVAL;
3275 }
3276 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
3277 return JNI_EINVAL;
3278 }
3279 if (FLAG_SET_CMDLINE(bool, TraceClassPaths, true) != Flag::SUCCESS) {
3280 return JNI_EINVAL;
3281 }
3282 }
3283
3284 // Change the default value for flags which have different default values
3285 // when working with older JDKs.
3286 #ifdef LINUX
3287 if (JDK_Version::current().compare_major(6) <= 0 &&
3288 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) {
3289 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false);
3290 }
3291 #endif // LINUX
3292 fix_appclasspath();
3293 return JNI_OK;
3294 }
3295
3296 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled)
3297 //
3298 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar
3299 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar".
3300 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty
3301 // path is treated as the current directory.
3302 //
3303 // This causes problems with CDS, which requires that all directories specified in the classpath
3304 // must be empty. In most cases, applications do NOT want to load classes from the current
3305 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up
3306 // scripts compatible with CDS.
3307 void Arguments::fix_appclasspath() {
3308 if (IgnoreEmptyClassPaths) {
3309 const char separator = *os::path_separator();
3310 const char* src = _java_class_path->value();
3311
3312 // skip over all the leading empty paths
3313 while (*src == separator) {
3314 src ++;
3315 }
3316
3317 char* copy = os::strdup_check_oom(src, mtInternal);
3318
3319 // trim all trailing empty paths
3320 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) {
3321 *tail = '\0';
3322 }
3323
3324 char from[3] = {separator, separator, '\0'};
3325 char to [2] = {separator, '\0'};
3326 while (StringUtils::replace_no_expand(copy, from, to) > 0) {
3327 // Keep replacing "::" -> ":" until we have no more "::" (non-windows)
3328 // Keep replacing ";;" -> ";" until we have no more ";;" (windows)
3329 }
3330
3331 _java_class_path->set_value(copy);
3332 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore
3333 }
3334
3335 if (!PrintSharedArchiveAndExit) {
3336 ClassLoader::trace_class_path(tty, "[classpath: ", _java_class_path->value());
3337 }
3338 }
3339
3340 static bool has_jar_files(const char* directory) {
3341 DIR* dir = os::opendir(directory);
3342 if (dir == NULL) return false;
3343
3344 struct dirent *entry;
3345 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtInternal);
3346 bool hasJarFile = false;
3347 while (!hasJarFile && (entry = os::readdir(dir, (dirent *) dbuf)) != NULL) {
3348 const char* name = entry->d_name;
3349 const char* ext = name + strlen(name) - 4;
3350 hasJarFile = ext > name && (os::file_name_strcmp(ext, ".jar") == 0);
3351 }
3352 FREE_C_HEAP_ARRAY(char, dbuf);
3353 os::closedir(dir);
3354 return hasJarFile ;
3355 }
3356
3357 static int check_non_empty_dirs(const char* path) {
3358 const char separator = *os::path_separator();
3359 const char* const end = path + strlen(path);
3360 int nonEmptyDirs = 0;
3361 while (path < end) {
3362 const char* tmp_end = strchr(path, separator);
3363 if (tmp_end == NULL) {
3364 if (has_jar_files(path)) {
3365 nonEmptyDirs++;
3366 jio_fprintf(defaultStream::output_stream(),
3367 "Non-empty directory: %s\n", path);
3368 }
3369 path = end;
3370 } else {
3371 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1, mtInternal);
3372 memcpy(dirpath, path, tmp_end - path);
3373 dirpath[tmp_end - path] = '\0';
3374 if (has_jar_files(dirpath)) {
3375 nonEmptyDirs++;
3376 jio_fprintf(defaultStream::output_stream(),
3377 "Non-empty directory: %s\n", dirpath);
3378 }
3379 FREE_C_HEAP_ARRAY(char, dirpath);
3380 path = tmp_end + 1;
3381 }
3382 }
3383 return nonEmptyDirs;
3384 }
3385
3386 jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) {
3387 // check if the default lib/endorsed directory exists; if so, error
3388 char path[JVM_MAXPATHLEN];
3389 const char* fileSep = os::file_separator();
3390 sprintf(path, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep);
3391
3392 if (CheckEndorsedAndExtDirs) {
3393 int nonEmptyDirs = 0;
3394 // check endorsed directory
3395 nonEmptyDirs += check_non_empty_dirs(path);
3396 // check the extension directories
3397 nonEmptyDirs += check_non_empty_dirs(Arguments::get_ext_dirs());
3398 if (nonEmptyDirs > 0) {
3399 return JNI_ERR;
3400 }
3401 }
3402
3403 DIR* dir = os::opendir(path);
3404 if (dir != NULL) {
3405 jio_fprintf(defaultStream::output_stream(),
3406 "<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n"
3407 "in modular form will be supported via the concept of upgradeable modules.\n");
3408 os::closedir(dir);
3409 return JNI_ERR;
3410 }
3411
3412 sprintf(path, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep);
3413 dir = os::opendir(path);
3414 if (dir != NULL) {
3415 jio_fprintf(defaultStream::output_stream(),
3416 "<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; "
3417 "Use -classpath instead.\n.");
3418 os::closedir(dir);
3419 return JNI_ERR;
3420 }
3421
3422 if (scp_assembly_required) {
3423 // Assemble the bootclasspath elements into the final path.
3424 char *combined_path = scp_p->combined_path();
3425 Arguments::set_sysclasspath(combined_path);
3426 FREE_C_HEAP_ARRAY(char, combined_path);
3427 }
3428
3429 // This must be done after all arguments have been processed.
3430 // java_compiler() true means set to "NONE" or empty.
3431 if (java_compiler() && !xdebug_mode()) {
3432 // For backwards compatibility, we switch to interpreted mode if
3433 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was
3434 // not specified.
3435 set_mode_flags(_int);
3436 }
3437
3438 // CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode),
3439 // but like -Xint, leave compilation thresholds unaffected.
3440 // With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well.
3441 if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) {
3442 set_mode_flags(_int);
3443 }
3444
3445 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set
3446 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) {
3447 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold);
3448 }
3449
3450 #if !defined(COMPILER2) && !INCLUDE_JVMCI
3451 // Don't degrade server performance for footprint
3452 if (FLAG_IS_DEFAULT(UseLargePages) &&
3453 MaxHeapSize < LargePageHeapSizeThreshold) {
3454 // No need for large granularity pages w/small heaps.
3455 // Note that large pages are enabled/disabled for both the
3456 // Java heap and the code cache.
3457 FLAG_SET_DEFAULT(UseLargePages, false);
3458 }
3459
3460 #elif defined(COMPILER2)
3461 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) {
3462 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1);
3463 }
3464 #endif
3465
3466 #if !defined(COMPILER2) && !INCLUDE_JVMCI
3467 UNSUPPORTED_OPTION(ProfileInterpreter, "ProfileInterpreter");
3468 NOT_PRODUCT(UNSUPPORTED_OPTION(TraceProfileInterpreter, "TraceProfileInterpreter"));
3469 UNSUPPORTED_OPTION(PrintMethodData, "PrintMethodData");
3470 #endif
3471
3472 #ifndef TIERED
3473 // Tiered compilation is undefined.
3474 UNSUPPORTED_OPTION(TieredCompilation, "TieredCompilation");
3475 #endif
3476
3477 // If we are running in a headless jre, force java.awt.headless property
3478 // to be true unless the property has already been set.
3479 // Also allow the OS environment variable JAVA_AWT_HEADLESS to set headless state.
3480 if (os::is_headless_jre()) {
3481 const char* headless = Arguments::get_property("java.awt.headless");
3482 if (headless == NULL) {
3483 const char *headless_env = ::getenv("JAVA_AWT_HEADLESS");
3484 if (headless_env == NULL) {
3485 if (!add_property("java.awt.headless=true")) {
3486 return JNI_ENOMEM;
3487 }
3488 } else {
3489 char buffer[256];
3490 jio_snprintf(buffer, sizeof(buffer), "java.awt.headless=%s", headless_env);
3491 if (!add_property(buffer)) {
3492 return JNI_ENOMEM;
3493 }
3494 }
3495 }
3496 }
3497
3498 if (UseConcMarkSweepGC && FLAG_IS_DEFAULT(UseParNewGC) && !UseParNewGC) {
3499 // CMS can only be used with ParNew
3500 FLAG_SET_ERGO(bool, UseParNewGC, true);
3501 }
3502
3503 if (!check_vm_args_consistency()) {
3504 return JNI_ERR;
3505 }
3506
3507 return JNI_OK;
3508 }
3509
3510 // Helper class for controlling the lifetime of JavaVMInitArgs
3511 // objects. The contents of the JavaVMInitArgs are guaranteed to be
3512 // deleted on the destruction of the ScopedVMInitArgs object.
3513 class ScopedVMInitArgs : public StackObj {
3514 private:
3515 JavaVMInitArgs _args;
3516 char* _container_name;
3517 bool _is_set;
3518 char* _vm_options_file_arg;
3519
3520 public:
3521 ScopedVMInitArgs(const char *container_name) {
3522 _args.version = JNI_VERSION_1_2;
3523 _args.nOptions = 0;
3524 _args.options = NULL;
3525 _args.ignoreUnrecognized = false;
3526 _container_name = (char *)container_name;
3527 _is_set = false;
3528 _vm_options_file_arg = NULL;
3529 }
3530
3531 // Populates the JavaVMInitArgs object represented by this
3532 // ScopedVMInitArgs object with the arguments in options. The
3533 // allocated memory is deleted by the destructor. If this method
3534 // returns anything other than JNI_OK, then this object is in a
3535 // partially constructed state, and should be abandoned.
3536 jint set_args(GrowableArray<JavaVMOption>* options) {
3537 _is_set = true;
3538 JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL(
3539 JavaVMOption, options->length(), mtInternal);
3540 if (options_arr == NULL) {
3541 return JNI_ENOMEM;
3542 }
3543 _args.options = options_arr;
3544
3545 for (int i = 0; i < options->length(); i++) {
3546 options_arr[i] = options->at(i);
3547 options_arr[i].optionString = os::strdup(options_arr[i].optionString);
3548 if (options_arr[i].optionString == NULL) {
3549 // Rely on the destructor to do cleanup.
3550 _args.nOptions = i;
3551 return JNI_ENOMEM;
3552 }
3553 }
3554
3555 _args.nOptions = options->length();
3556 _args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions;
3557 return JNI_OK;
3558 }
3559
3560 JavaVMInitArgs* get() { return &_args; }
3561 char* container_name() { return _container_name; }
3562 bool is_set() { return _is_set; }
3563 bool found_vm_options_file_arg() { return _vm_options_file_arg != NULL; }
3564 char* vm_options_file_arg() { return _vm_options_file_arg; }
3565
3566 void set_vm_options_file_arg(const char *vm_options_file_arg) {
3567 if (_vm_options_file_arg != NULL) {
3568 os::free(_vm_options_file_arg);
3569 }
3570 _vm_options_file_arg = os::strdup_check_oom(vm_options_file_arg);
3571 }
3572
3573 ~ScopedVMInitArgs() {
3574 if (_vm_options_file_arg != NULL) {
3575 os::free(_vm_options_file_arg);
3576 }
3577 if (_args.options == NULL) return;
3578 for (int i = 0; i < _args.nOptions; i++) {
3579 os::free(_args.options[i].optionString);
3580 }
3581 FREE_C_HEAP_ARRAY(JavaVMOption, _args.options);
3582 }
3583
3584 // Insert options into this option list, to replace option at
3585 // vm_options_file_pos (-XX:VMOptionsFile)
3586 jint insert(const JavaVMInitArgs* args,
3587 const JavaVMInitArgs* args_to_insert,
3588 const int vm_options_file_pos) {
3589 assert(_args.options == NULL, "shouldn't be set yet");
3590 assert(args_to_insert->nOptions != 0, "there should be args to insert");
3591 assert(vm_options_file_pos != -1, "vm_options_file_pos should be set");
3592
3593 int length = args->nOptions + args_to_insert->nOptions - 1;
3594 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtInternal)
3595 GrowableArray<JavaVMOption>(length, true); // Construct new option array
3596 for (int i = 0; i < args->nOptions; i++) {
3597 if (i == vm_options_file_pos) {
3598 // insert the new options starting at the same place as the
3599 // -XX:VMOptionsFile option
3600 for (int j = 0; j < args_to_insert->nOptions; j++) {
3601 options->push(args_to_insert->options[j]);
3602 }
3603 } else {
3604 options->push(args->options[i]);
3605 }
3606 }
3607 // make into options array
3608 jint result = set_args(options);
3609 delete options;
3610 return result;
3611 }
3612 };
3613
3614 jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) {
3615 return parse_options_environment_variable("_JAVA_OPTIONS", args);
3616 }
3617
3618 jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) {
3619 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args);
3620 }
3621
3622 jint Arguments::parse_options_environment_variable(const char* name,
3623 ScopedVMInitArgs* vm_args) {
3624 char *buffer = ::getenv(name);
3625
3626 // Don't check this environment variable if user has special privileges
3627 // (e.g. unix su command).
3628 if (buffer == NULL || os::have_special_privileges()) {
3629 return JNI_OK;
3630 }
3631
3632 if ((buffer = os::strdup(buffer)) == NULL) {
3633 return JNI_ENOMEM;
3634 }
3635
3636 int retcode = parse_options_buffer(name, buffer, strlen(buffer), vm_args);
3637
3638 os::free(buffer);
3639 return retcode;
3640 }
3641
3642 jint Arguments::parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args) {
3643 // read file into buffer
3644 int fd = ::open(file_name, O_RDONLY);
3645 if (fd < 0) {
3646 jio_fprintf(defaultStream::error_stream(),
3647 "Could not open options file '%s'\n",
3648 file_name);
3649 return JNI_ERR;
3650 }
3651
3652 struct stat stbuf;
3653 int retcode = os::stat(file_name, &stbuf);
3654 if (retcode != 0) {
3655 jio_fprintf(defaultStream::error_stream(),
3656 "Could not stat options file '%s'\n",
3657 file_name);
3658 os::close(fd);
3659 return JNI_ERR;
3660 }
3661
3662 if (stbuf.st_size == 0) {
3663 // tell caller there is no option data and that is ok
3664 os::close(fd);
3665 return JNI_OK;
3666 }
3667
3668 // '+ 1' for NULL termination even with max bytes
3669 size_t bytes_alloc = stbuf.st_size + 1;
3670
3671 char *buf = NEW_C_HEAP_ARRAY_RETURN_NULL(char, bytes_alloc, mtInternal);
3672 if (NULL == buf) {
3673 jio_fprintf(defaultStream::error_stream(),
3674 "Could not allocate read buffer for options file parse\n");
3675 os::close(fd);
3676 return JNI_ENOMEM;
3677 }
3678
3679 memset(buf, 0, bytes_alloc);
3680
3681 // Fill buffer
3682 // Use ::read() instead of os::read because os::read()
3683 // might do a thread state transition
3684 // and it is too early for that here
3685
3686 ssize_t bytes_read = ::read(fd, (void *)buf, (unsigned)bytes_alloc);
3687 os::close(fd);
3688 if (bytes_read < 0) {
3689 FREE_C_HEAP_ARRAY(char, buf);
3690 jio_fprintf(defaultStream::error_stream(),
3691 "Could not read options file '%s'\n", file_name);
3692 return JNI_ERR;
3693 }
3694
3695 if (bytes_read == 0) {
3696 // tell caller there is no option data and that is ok
3697 FREE_C_HEAP_ARRAY(char, buf);
3698 return JNI_OK;
3699 }
3700
3701 retcode = parse_options_buffer(file_name, buf, bytes_read, vm_args);
3702
3703 FREE_C_HEAP_ARRAY(char, buf);
3704 return retcode;
3705 }
3706
3707 jint Arguments::parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args) {
3708 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JavaVMOption>(2, true); // Construct option array
3709
3710 // some pointers to help with parsing
3711 char *buffer_end = buffer + buf_len;
3712 char *opt_hd = buffer;
3713 char *wrt = buffer;
3714 char *rd = buffer;
3715
3716 // parse all options
3717 while (rd < buffer_end) {
3718 // skip leading white space from the input string
3719 while (rd < buffer_end && isspace(*rd)) {
3720 rd++;
3721 }
3722
3723 if (rd >= buffer_end) {
3724 break;
3725 }
3726
3727 // Remember this is where we found the head of the token.
3728 opt_hd = wrt;
3729
3730 // Tokens are strings of non white space characters separated
3731 // by one or more white spaces.
3732 while (rd < buffer_end && !isspace(*rd)) {
3733 if (*rd == '\'' || *rd == '"') { // handle a quoted string
3734 int quote = *rd; // matching quote to look for
3735 rd++; // don't copy open quote
3736 while (rd < buffer_end && *rd != quote) {
3737 // include everything (even spaces)
3738 // up until the close quote
3739 *wrt++ = *rd++; // copy to option string
3740 }
3741
3742 if (rd < buffer_end) {
3743 rd++; // don't copy close quote
3744 } else {
3745 // did not see closing quote
3746 jio_fprintf(defaultStream::error_stream(),
3747 "Unmatched quote in %s\n", name);
3748 delete options;
3749 return JNI_ERR;
3750 }
3751 } else {
3752 *wrt++ = *rd++; // copy to option string
3753 }
3754 }
3755
3756 // steal a white space character and set it to NULL
3757 *wrt++ = '\0';
3758 // We now have a complete token
3759
3760 JavaVMOption option;
3761 option.optionString = opt_hd;
3762 option.extraInfo = NULL;
3763
3764 options->append(option); // Fill in option
3765
3766 rd++; // Advance to next character
3767 }
3768
3769 // Fill out JavaVMInitArgs structure.
3770 jint status = vm_args->set_args(options);
3771
3772 delete options;
3773 return status;
3774 }
3775
3776 void Arguments::set_shared_spaces_flags() {
3777 if (DumpSharedSpaces) {
3778 if (RequireSharedSpaces) {
3779 warning("Cannot dump shared archive while using shared archive");
3780 }
3781 UseSharedSpaces = false;
3782 #ifdef _LP64
3783 if (!UseCompressedOops || !UseCompressedClassPointers) {
3784 vm_exit_during_initialization(
3785 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL);
3786 }
3787 } else {
3788 if (!UseCompressedOops || !UseCompressedClassPointers) {
3789 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces.");
3790 }
3791 #endif
3792 }
3793 }
3794
3795 #if !INCLUDE_ALL_GCS
3796 static void force_serial_gc() {
3797 FLAG_SET_DEFAULT(UseSerialGC, true);
3798 UNSUPPORTED_GC_OPTION(UseG1GC);
3799 UNSUPPORTED_GC_OPTION(UseParallelGC);
3800 UNSUPPORTED_GC_OPTION(UseParallelOldGC);
3801 UNSUPPORTED_GC_OPTION(UseConcMarkSweepGC);
3802 UNSUPPORTED_GC_OPTION(UseParNewGC);
3803 }
3804 #endif // INCLUDE_ALL_GCS
3805
3806 // Sharing support
3807 // Construct the path to the archive
3808 static char* get_shared_archive_path() {
3809 char *shared_archive_path;
3810 if (SharedArchiveFile == NULL) {
3811 char jvm_path[JVM_MAXPATHLEN];
3812 os::jvm_path(jvm_path, sizeof(jvm_path));
3813 char *end = strrchr(jvm_path, *os::file_separator());
3814 if (end != NULL) *end = '\0';
3815 size_t jvm_path_len = strlen(jvm_path);
3816 size_t file_sep_len = strlen(os::file_separator());
3817 const size_t len = jvm_path_len + file_sep_len + 20;
3818 shared_archive_path = NEW_C_HEAP_ARRAY(char, len, mtInternal);
3819 if (shared_archive_path != NULL) {
3820 jio_snprintf(shared_archive_path, len, "%s%sclasses.jsa",
3821 jvm_path, os::file_separator());
3822 }
3823 } else {
3824 shared_archive_path = os::strdup_check_oom(SharedArchiveFile, mtInternal);
3825 }
3826 return shared_archive_path;
3827 }
3828
3829 #ifndef PRODUCT
3830 // Determine whether LogVMOutput should be implicitly turned on.
3831 static bool use_vm_log() {
3832 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) ||
3833 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods ||
3834 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers ||
3835 PrintAssembly || TraceDeoptimization || TraceDependencies ||
3836 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) {
3837 return true;
3838 }
3839
3840 #ifdef COMPILER1
3841 if (PrintC1Statistics) {
3842 return true;
3843 }
3844 #endif // COMPILER1
3845
3846 #ifdef COMPILER2
3847 if (PrintOptoAssembly || PrintOptoStatistics) {
3848 return true;
3849 }
3850 #endif // COMPILER2
3851
3852 return false;
3853 }
3854
3855 #endif // PRODUCT
3856
3857 bool Arguments::args_contains_vm_options_file_arg(const JavaVMInitArgs* args) {
3858 for (int index = 0; index < args->nOptions; index++) {
3859 const JavaVMOption* option = args->options + index;
3860 const char* tail;
3861 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
3862 return true;
3863 }
3864 }
3865 return false;
3866 }
3867
3868 jint Arguments::insert_vm_options_file(const JavaVMInitArgs* args,
3869 const char* vm_options_file,
3870 const int vm_options_file_pos,
3871 ScopedVMInitArgs* vm_options_file_args,
3872 ScopedVMInitArgs* args_out) {
3873 jint code = parse_vm_options_file(vm_options_file, vm_options_file_args);
3874 if (code != JNI_OK) {
3875 return code;
3876 }
3877
3878 if (vm_options_file_args->get()->nOptions < 1) {
3879 return JNI_OK;
3880 }
3881
3882 if (args_contains_vm_options_file_arg(vm_options_file_args->get())) {
3883 jio_fprintf(defaultStream::error_stream(),
3884 "A VM options file may not refer to a VM options file. "
3885 "Specification of '-XX:VMOptionsFile=<file-name>' in the "
3886 "options file '%s' in options container '%s' is an error.\n",
3887 vm_options_file_args->vm_options_file_arg(),
3888 vm_options_file_args->container_name());
3889 return JNI_EINVAL;
3890 }
3891
3892 return args_out->insert(args, vm_options_file_args->get(),
3893 vm_options_file_pos);
3894 }
3895
3896 // Expand -XX:VMOptionsFile found in args_in as needed.
3897 // mod_args and args_out parameters may return values as needed.
3898 jint Arguments::expand_vm_options_as_needed(const JavaVMInitArgs* args_in,
3899 ScopedVMInitArgs* mod_args,
3900 JavaVMInitArgs** args_out) {
3901 jint code = match_special_option_and_act(args_in, mod_args);
3902 if (code != JNI_OK) {
3903 return code;
3904 }
3905
3906 if (mod_args->is_set()) {
3907 // args_in contains -XX:VMOptionsFile and mod_args contains the
3908 // original options from args_in along with the options expanded
3909 // from the VMOptionsFile. Return a short-hand to the caller.
3910 *args_out = mod_args->get();
3911 } else {
3912 *args_out = (JavaVMInitArgs *)args_in; // no changes so use args_in
3913 }
3914 return JNI_OK;
3915 }
3916
3917 jint Arguments::match_special_option_and_act(const JavaVMInitArgs* args,
3918 ScopedVMInitArgs* args_out) {
3919 // Remaining part of option string
3920 const char* tail;
3921 ScopedVMInitArgs vm_options_file_args(args_out->container_name());
3922
3923 for (int index = 0; index < args->nOptions; index++) {
3924 const JavaVMOption* option = args->options + index;
3925 if (ArgumentsExt::process_options(option)) {
3926 continue;
3927 }
3928 if (match_option(option, "-XX:Flags=", &tail)) {
3929 Arguments::set_jvm_flags_file(tail);
3930 continue;
3931 }
3932 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
3933 if (vm_options_file_args.found_vm_options_file_arg()) {
3934 jio_fprintf(defaultStream::error_stream(),
3935 "The option '%s' is already specified in the options "
3936 "container '%s' so the specification of '%s' in the "
3937 "same options container is an error.\n",
3938 vm_options_file_args.vm_options_file_arg(),
3939 vm_options_file_args.container_name(),
3940 option->optionString);
3941 return JNI_EINVAL;
3942 }
3943 vm_options_file_args.set_vm_options_file_arg(option->optionString);
3944 // If there's a VMOptionsFile, parse that
3945 jint code = insert_vm_options_file(args, tail, index,
3946 &vm_options_file_args, args_out);
3947 if (code != JNI_OK) {
3948 return code;
3949 }
3950 args_out->set_vm_options_file_arg(vm_options_file_args.vm_options_file_arg());
3951 if (args_out->is_set()) {
3952 // The VMOptions file inserted some options so switch 'args'
3953 // to the new set of options, and continue processing which
3954 // preserves "last option wins" semantics.
3955 args = args_out->get();
3956 // The first option from the VMOptionsFile replaces the
3957 // current option. So we back track to process the
3958 // replacement option.
3959 index--;
3960 }
3961 continue;
3962 }
3963 if (match_option(option, "-XX:+PrintVMOptions")) {
3964 PrintVMOptions = true;
3965 continue;
3966 }
3967 if (match_option(option, "-XX:-PrintVMOptions")) {
3968 PrintVMOptions = false;
3969 continue;
3970 }
3971 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) {
3972 IgnoreUnrecognizedVMOptions = true;
3973 continue;
3974 }
3975 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) {
3976 IgnoreUnrecognizedVMOptions = false;
3977 continue;
3978 }
3979 if (match_option(option, "-XX:+PrintFlagsInitial")) {
3980 CommandLineFlags::printFlags(tty, false);
3981 vm_exit(0);
3982 }
3983 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) {
3984 #if INCLUDE_NMT
3985 // The launcher did not setup nmt environment variable properly.
3986 if (!MemTracker::check_launcher_nmt_support(tail)) {
3987 warning("Native Memory Tracking did not setup properly, using wrong launcher?");
3988 }
3989
3990 // Verify if nmt option is valid.
3991 if (MemTracker::verify_nmt_option()) {
3992 // Late initialization, still in single-threaded mode.
3993 if (MemTracker::tracking_level() >= NMT_summary) {
3994 MemTracker::init();
3995 }
3996 } else {
3997 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL);
3998 }
3999 continue;
4000 #else
4001 jio_fprintf(defaultStream::error_stream(),
4002 "Native Memory Tracking is not supported in this VM\n");
4003 return JNI_ERR;
4004 #endif
4005 }
4006
4007 #ifndef PRODUCT
4008 if (match_option(option, "-XX:+PrintFlagsWithComments")) {
4009 CommandLineFlags::printFlags(tty, true);
4010 vm_exit(0);
4011 }
4012 #endif
4013 }
4014 return JNI_OK;
4015 }
4016
4017 static void print_options(const JavaVMInitArgs *args) {
4018 const char* tail;
4019 for (int index = 0; index < args->nOptions; index++) {
4020 const JavaVMOption *option = args->options + index;
4021 if (match_option(option, "-XX:", &tail)) {
4022 logOption(tail);
4023 }
4024 }
4025 }
4026
4027 bool Arguments::handle_deprecated_print_gc_flags() {
4028 if (PrintGC) {
4029 log_warning(gc)("-XX:+PrintGC is deprecated. Will use -Xlog:gc instead.");
4030 }
4031 if (PrintGCDetails) {
4032 log_warning(gc)("-XX:+PrintGCDetails is deprecated. Will use -Xlog:gc* instead.");
4033 }
4034
4035 if (_gc_log_filename != NULL) {
4036 // -Xloggc was used to specify a filename
4037 const char* gc_conf = PrintGCDetails ? "gc*" : "gc";
4038 return LogConfiguration::parse_log_arguments(_gc_log_filename, gc_conf, NULL, NULL, NULL);
4039 } else if (PrintGC || PrintGCDetails) {
4040 LogConfiguration::configure_stdout(LogLevel::Info, !PrintGCDetails, LOG_TAGS(gc));
4041 }
4042 return true;
4043 }
4044
4045 // Parse entry point called from JNI_CreateJavaVM
4046
4047 jint Arguments::parse(const JavaVMInitArgs* initial_cmd_args) {
4048 assert(verify_special_jvm_flags(), "deprecated and obsolete flag table inconsistent");
4049
4050 // Initialize ranges and constraints
4051 CommandLineFlagRangeList::init();
4052 CommandLineFlagConstraintList::init();
4053
4054 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed.
4055 const char* hotspotrc = ".hotspotrc";
4056 bool settings_file_specified = false;
4057 bool needs_hotspotrc_warning = false;
4058 ScopedVMInitArgs initial_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
4059 ScopedVMInitArgs initial_java_options_args("env_var='_JAVA_OPTIONS'");
4060
4061 // Pointers to current working set of containers
4062 JavaVMInitArgs* cur_cmd_args;
4063 JavaVMInitArgs* cur_java_options_args;
4064 JavaVMInitArgs* cur_java_tool_options_args;
4065
4066 // Containers for modified/expanded options
4067 ScopedVMInitArgs mod_cmd_args("cmd_line_args");
4068 ScopedVMInitArgs mod_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
4069 ScopedVMInitArgs mod_java_options_args("env_var='_JAVA_OPTIONS'");
4070
4071
4072 jint code =
4073 parse_java_tool_options_environment_variable(&initial_java_tool_options_args);
4074 if (code != JNI_OK) {
4075 return code;
4076 }
4077
4078 code = parse_java_options_environment_variable(&initial_java_options_args);
4079 if (code != JNI_OK) {
4080 return code;
4081 }
4082
4083 code = expand_vm_options_as_needed(initial_java_tool_options_args.get(),
4084 &mod_java_tool_options_args,
4085 &cur_java_tool_options_args);
4086 if (code != JNI_OK) {
4087 return code;
4088 }
4089
4090 code = expand_vm_options_as_needed(initial_cmd_args,
4091 &mod_cmd_args,
4092 &cur_cmd_args);
4093 if (code != JNI_OK) {
4094 return code;
4095 }
4096
4097 code = expand_vm_options_as_needed(initial_java_options_args.get(),
4098 &mod_java_options_args,
4099 &cur_java_options_args);
4100 if (code != JNI_OK) {
4101 return code;
4102 }
4103
4104 const char* flags_file = Arguments::get_jvm_flags_file();
4105 settings_file_specified = (flags_file != NULL);
4106
4107 if (IgnoreUnrecognizedVMOptions) {
4108 cur_cmd_args->ignoreUnrecognized = true;
4109 cur_java_tool_options_args->ignoreUnrecognized = true;
4110 cur_java_options_args->ignoreUnrecognized = true;
4111 }
4112
4113 // Parse specified settings file
4114 if (settings_file_specified) {
4115 if (!process_settings_file(flags_file, true,
4116 cur_cmd_args->ignoreUnrecognized)) {
4117 return JNI_EINVAL;
4118 }
4119 } else {
4120 #ifdef ASSERT
4121 // Parse default .hotspotrc settings file
4122 if (!process_settings_file(".hotspotrc", false,
4123 cur_cmd_args->ignoreUnrecognized)) {
4124 return JNI_EINVAL;
4125 }
4126 #else
4127 struct stat buf;
4128 if (os::stat(hotspotrc, &buf) == 0) {
4129 needs_hotspotrc_warning = true;
4130 }
4131 #endif
4132 }
4133
4134 if (PrintVMOptions) {
4135 print_options(cur_java_tool_options_args);
4136 print_options(cur_cmd_args);
4137 print_options(cur_java_options_args);
4138 }
4139
4140 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS
4141 jint result = parse_vm_init_args(cur_java_tool_options_args,
4142 cur_java_options_args,
4143 cur_cmd_args);
4144
4145 if (result != JNI_OK) {
4146 return result;
4147 }
4148
4149 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed.
4150 SharedArchivePath = get_shared_archive_path();
4151 if (SharedArchivePath == NULL) {
4152 return JNI_ENOMEM;
4153 }
4154
4155 // Set up VerifySharedSpaces
4156 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) {
4157 VerifySharedSpaces = true;
4158 }
4159
4160 // Delay warning until here so that we've had a chance to process
4161 // the -XX:-PrintWarnings flag
4162 if (needs_hotspotrc_warning) {
4163 warning("%s file is present but has been ignored. "
4164 "Run with -XX:Flags=%s to load the file.",
4165 hotspotrc, hotspotrc);
4166 }
4167
4168 #if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
4169 UNSUPPORTED_OPTION(UseLargePages, "-XX:+UseLargePages");
4170 #endif
4171
4172 ArgumentsExt::report_unsupported_options();
4173
4174 #ifndef PRODUCT
4175 if (TraceBytecodesAt != 0) {
4176 TraceBytecodes = true;
4177 }
4178 if (CountCompiledCalls) {
4179 if (UseCounterDecay) {
4180 warning("UseCounterDecay disabled because CountCalls is set");
4181 UseCounterDecay = false;
4182 }
4183 }
4184 #endif // PRODUCT
4185
4186 if (ScavengeRootsInCode == 0) {
4187 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) {
4188 warning("Forcing ScavengeRootsInCode non-zero");
4189 }
4190 ScavengeRootsInCode = 1;
4191 }
4192
4193 if (!handle_deprecated_print_gc_flags()) {
4194 return JNI_EINVAL;
4195 }
4196
4197 // Set object alignment values.
4198 set_object_alignment();
4199
4200 #if !INCLUDE_ALL_GCS
4201 force_serial_gc();
4202 #endif // INCLUDE_ALL_GCS
4203 #if !INCLUDE_CDS
4204 if (DumpSharedSpaces || RequireSharedSpaces) {
4205 jio_fprintf(defaultStream::error_stream(),
4206 "Shared spaces are not supported in this VM\n");
4207 return JNI_ERR;
4208 }
4209 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) || PrintSharedSpaces) {
4210 warning("Shared spaces are not supported in this VM");
4211 FLAG_SET_DEFAULT(UseSharedSpaces, false);
4212 FLAG_SET_DEFAULT(PrintSharedSpaces, false);
4213 }
4214 no_shared_spaces("CDS Disabled");
4215 #endif // INCLUDE_CDS
4216
4217 return JNI_OK;
4218 }
4219
4220 jint Arguments::apply_ergo() {
4221
4222 // Set flags based on ergonomics.
4223 set_ergonomics_flags();
4224
4225 set_shared_spaces_flags();
4226
4227 // Check the GC selections again.
4228 if (!check_gc_consistency()) {
4229 return JNI_EINVAL;
4230 }
4231
4232 if (TieredCompilation) {
4233 set_tiered_flags();
4234 } else {
4235 int max_compilation_policy_choice = 1;
4236 #ifdef COMPILER2
4237 max_compilation_policy_choice = 2;
4238 #endif
4239 // Check if the policy is valid.
4240 if (CompilationPolicyChoice >= max_compilation_policy_choice) {
4241 vm_exit_during_initialization(
4242 "Incompatible compilation policy selected", NULL);
4243 }
4244 // Scale CompileThreshold
4245 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves CompileThreshold unchanged.
4246 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
4247 FLAG_SET_ERGO(intx, CompileThreshold, scaled_compile_threshold(CompileThreshold));
4248 }
4249 }
4250
4251 #ifdef COMPILER2
4252 #ifndef PRODUCT
4253 if (PrintIdealGraphLevel > 0) {
4254 FLAG_SET_ERGO(bool, PrintIdealGraph, true);
4255 }
4256 #endif
4257 #endif
4258
4259 // Set heap size based on available physical memory
4260 set_heap_size();
4261
4262 ArgumentsExt::set_gc_specific_flags();
4263
4264 // Initialize Metaspace flags and alignments
4265 Metaspace::ergo_initialize();
4266
4267 // Set bytecode rewriting flags
4268 set_bytecode_flags();
4269
4270 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled
4271 jint code = set_aggressive_opts_flags();
4272 if (code != JNI_OK) {
4273 return code;
4274 }
4275
4276 // Turn off biased locking for locking debug mode flags,
4277 // which are subtly different from each other but neither works with
4278 // biased locking
4279 if (UseHeavyMonitors
4280 #ifdef COMPILER1
4281 || !UseFastLocking
4282 #endif // COMPILER1
4283 #if INCLUDE_JVMCI
4284 || !JVMCIUseFastLocking
4285 #endif
4286 ) {
4287 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) {
4288 // flag set to true on command line; warn the user that they
4289 // can't enable biased locking here
4290 warning("Biased Locking is not supported with locking debug flags"
4291 "; ignoring UseBiasedLocking flag." );
4292 }
4293 UseBiasedLocking = false;
4294 }
4295
4296 #ifdef CC_INTERP
4297 // Clear flags not supported on zero.
4298 FLAG_SET_DEFAULT(ProfileInterpreter, false);
4299 FLAG_SET_DEFAULT(UseBiasedLocking, false);
4300 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false));
4301 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false));
4302 #endif // CC_INTERP
4303
4304 #ifdef COMPILER2
4305 if (!EliminateLocks) {
4306 EliminateNestedLocks = false;
4307 }
4308 if (!Inline) {
4309 IncrementalInline = false;
4310 }
4311 #ifndef PRODUCT
4312 if (!IncrementalInline) {
4313 AlwaysIncrementalInline = false;
4314 }
4315 #endif
4316 if (!UseTypeSpeculation && FLAG_IS_DEFAULT(TypeProfileLevel)) {
4317 // nothing to use the profiling, turn if off
4318 FLAG_SET_DEFAULT(TypeProfileLevel, 0);
4319 }
4320 #endif
4321
4322 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) {
4323 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output");
4324 DebugNonSafepoints = true;
4325 }
4326
4327 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) {
4328 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used");
4329 }
4330
4331 #ifndef PRODUCT
4332 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) {
4333 if (use_vm_log()) {
4334 LogVMOutput = true;
4335 }
4336 }
4337 #endif // PRODUCT
4338
4339 if (PrintCommandLineFlags) {
4340 CommandLineFlags::printSetFlags(tty);
4341 }
4342
4343 // Apply CPU specific policy for the BiasedLocking
4344 if (UseBiasedLocking) {
4345 if (!VM_Version::use_biased_locking() &&
4346 !(FLAG_IS_CMDLINE(UseBiasedLocking))) {
4347 UseBiasedLocking = false;
4348 }
4349 }
4350 #ifdef COMPILER2
4351 if (!UseBiasedLocking || EmitSync != 0) {
4352 UseOptoBiasInlining = false;
4353 }
4354 #endif
4355
4356 return JNI_OK;
4357 }
4358
4359 jint Arguments::adjust_after_os() {
4360 if (UseNUMA) {
4361 if (UseParallelGC || UseParallelOldGC) {
4362 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) {
4363 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M);
4364 }
4365 }
4366 // UseNUMAInterleaving is set to ON for all collectors and
4367 // platforms when UseNUMA is set to ON. NUMA-aware collectors
4368 // such as the parallel collector for Linux and Solaris will
4369 // interleave old gen and survivor spaces on top of NUMA
4370 // allocation policy for the eden space.
4371 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on
4372 // all platforms and ParallelGC on Windows will interleave all
4373 // of the heap spaces across NUMA nodes.
4374 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) {
4375 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true);
4376 }
4377 }
4378 return JNI_OK;
4379 }
4380
4381 int Arguments::PropertyList_count(SystemProperty* pl) {
4382 int count = 0;
4383 while(pl != NULL) {
4384 count++;
4385 pl = pl->next();
4386 }
4387 return count;
4388 }
4389
4390 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) {
4391 assert(key != NULL, "just checking");
4392 SystemProperty* prop;
4393 for (prop = pl; prop != NULL; prop = prop->next()) {
4394 if (strcmp(key, prop->key()) == 0) return prop->value();
4395 }
4396 return NULL;
4397 }
4398
4399 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) {
4400 int count = 0;
4401 const char* ret_val = NULL;
4402
4403 while(pl != NULL) {
4404 if(count >= index) {
4405 ret_val = pl->key();
4406 break;
4407 }
4408 count++;
4409 pl = pl->next();
4410 }
4411
4412 return ret_val;
4413 }
4414
4415 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) {
4416 int count = 0;
4417 char* ret_val = NULL;
4418
4419 while(pl != NULL) {
4420 if(count >= index) {
4421 ret_val = pl->value();
4422 break;
4423 }
4424 count++;
4425 pl = pl->next();
4426 }
4427
4428 return ret_val;
4429 }
4430
4431 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) {
4432 SystemProperty* p = *plist;
4433 if (p == NULL) {
4434 *plist = new_p;
4435 } else {
4436 while (p->next() != NULL) {
4437 p = p->next();
4438 }
4439 p->set_next(new_p);
4440 }
4441 }
4442
4443 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v) {
4444 if (plist == NULL)
4445 return;
4446
4447 SystemProperty* new_p = new SystemProperty(k, v, true);
4448 PropertyList_add(plist, new_p);
4449 }
4450
4451 void Arguments::PropertyList_add(SystemProperty *element) {
4452 PropertyList_add(&_system_properties, element);
4453 }
4454
4455 // This add maintains unique property key in the list.
4456 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v, jboolean append) {
4457 if (plist == NULL)
4458 return;
4459
4460 // If property key exist then update with new value.
4461 SystemProperty* prop;
4462 for (prop = *plist; prop != NULL; prop = prop->next()) {
4463 if (strcmp(k, prop->key()) == 0) {
4464 if (append) {
4465 prop->append_value(v);
4466 } else {
4467 prop->set_value(v);
4468 }
4469 return;
4470 }
4471 }
4472
4473 PropertyList_add(plist, k, v);
4474 }
4475
4476 // Copies src into buf, replacing "%%" with "%" and "%p" with pid
4477 // Returns true if all of the source pointed by src has been copied over to
4478 // the destination buffer pointed by buf. Otherwise, returns false.
4479 // Notes:
4480 // 1. If the length (buflen) of the destination buffer excluding the
4481 // NULL terminator character is not long enough for holding the expanded
4482 // pid characters, it also returns false instead of returning the partially
4483 // expanded one.
4484 // 2. The passed in "buflen" should be large enough to hold the null terminator.
4485 bool Arguments::copy_expand_pid(const char* src, size_t srclen,
4486 char* buf, size_t buflen) {
4487 const char* p = src;
4488 char* b = buf;
4489 const char* src_end = &src[srclen];
4490 char* buf_end = &buf[buflen - 1];
4491
4492 while (p < src_end && b < buf_end) {
4493 if (*p == '%') {
4494 switch (*(++p)) {
4495 case '%': // "%%" ==> "%"
4496 *b++ = *p++;
4497 break;
4498 case 'p': { // "%p" ==> current process id
4499 // buf_end points to the character before the last character so
4500 // that we could write '\0' to the end of the buffer.
4501 size_t buf_sz = buf_end - b + 1;
4502 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id());
4503
4504 // if jio_snprintf fails or the buffer is not long enough to hold
4505 // the expanded pid, returns false.
4506 if (ret < 0 || ret >= (int)buf_sz) {
4507 return false;
4508 } else {
4509 b += ret;
4510 assert(*b == '\0', "fail in copy_expand_pid");
4511 if (p == src_end && b == buf_end + 1) {
4512 // reach the end of the buffer.
4513 return true;
4514 }
4515 }
4516 p++;
4517 break;
4518 }
4519 default :
4520 *b++ = '%';
4521 }
4522 } else {
4523 *b++ = *p++;
4524 }
4525 }
4526 *b = '\0';
4527 return (p == src_end); // return false if not all of the source was copied
4528 }