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 { "SegmentedHeapDumpThreshold", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(10) },
376
377 #ifdef TEST_VERIFY_SPECIAL_JVM_FLAGS
378 { "dep > obs", JDK_Version::jdk(9), JDK_Version::jdk(8), JDK_Version::undefined() },
379 { "dep > exp ", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::jdk(8) },
380 { "obs > exp ", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::jdk(8) },
381 { "not deprecated or obsolete", JDK_Version::undefined(), JDK_Version::undefined(), JDK_Version::jdk(9) },
382 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
383 { "dup option", JDK_Version::jdk(9), JDK_Version::undefined(), JDK_Version::undefined() },
384 { "BytecodeVerificationRemote", JDK_Version::undefined(), JDK_Version::jdk(9), JDK_Version::undefined() },
385 #endif
386
387 { NULL, JDK_Version(0), JDK_Version(0) }
388 };
389
390 // Flags that are aliases for other flags.
391 typedef struct {
392 const char* alias_name;
393 const char* real_name;
394 } AliasedFlag;
395
396 static AliasedFlag const aliased_jvm_flags[] = {
397 { "DefaultMaxRAMFraction", "MaxRAMFraction" },
398 { "CMSMarkStackSizeMax", "MarkStackSizeMax" },
399 { "CMSMarkStackSize", "MarkStackSize" },
400 { "G1MarkStackSize", "MarkStackSize" },
401 { "ParallelMarkingThreads", "ConcGCThreads" },
402 { "ParallelCMSThreads", "ConcGCThreads" },
403 { "CreateMinidumpOnCrash", "CreateCoredumpOnCrash" },
404 { NULL, NULL}
405 };
406
407 static AliasedLoggingFlag const aliased_logging_flags[] = {
408 { "TraceBiasedLocking", LogLevel::Info, true, LOG_TAGS(biasedlocking) },
409 { "TraceClassLoading", LogLevel::Info, true, LOG_TAGS(classload) },
410 { "TraceClassLoadingPreorder", LogLevel::Debug, true, LOG_TAGS(classload, preorder) },
411 { "TraceClassPaths", LogLevel::Info, true, LOG_TAGS(classpath) },
412 { "TraceClassResolution", LogLevel::Debug, true, LOG_TAGS(classresolve) },
413 { "TraceClassUnloading", LogLevel::Info, true, LOG_TAGS(classunload) },
414 { "TraceExceptions", LogLevel::Info, true, LOG_TAGS(exceptions) },
415 { "TraceMonitorInflation", LogLevel::Debug, true, LOG_TAGS(monitorinflation) },
416 { "TraceSafepointCleanupTime", LogLevel::Info, true, LOG_TAGS(safepointcleanup) },
417 { NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG) }
418 };
419
420 #ifndef PRODUCT
421 // These options are removed in jdk9. Remove this code for jdk10.
422 static AliasedFlag const removed_develop_logging_flags[] = {
423 { "TraceClassInitialization", "-Xlog:classinit" },
424 { "TraceClassLoaderData", "-Xlog:classloaderdata" },
425 { "TraceDefaultMethods", "-Xlog:defaultmethods=debug" },
426 { "TraceItables", "-Xlog:itables=debug" },
427 { "TraceSafepoint", "-Xlog:safepoint=debug" },
428 { "TraceStartupTime", "-Xlog:startuptime" },
429 { "TraceVMOperation", "-Xlog:vmoperation=debug" },
430 { "PrintVtables", "-Xlog:vtables=debug" },
431 { "VerboseVerification", "-Xlog:verboseverification" },
432 { NULL, NULL }
433 };
434 #endif //PRODUCT
435
436 // Return true if "v" is less than "other", where "other" may be "undefined".
437 static bool version_less_than(JDK_Version v, JDK_Version other) {
438 assert(!v.is_undefined(), "must be defined");
439 if (!other.is_undefined() && v.compare(other) >= 0) {
440 return false;
441 } else {
442 return true;
443 }
444 }
445
446 static bool lookup_special_flag(const char *flag_name, SpecialFlag& flag) {
447 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
448 if ((strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
449 flag = special_jvm_flags[i];
450 return true;
451 }
452 }
453 return false;
454 }
455
456 bool Arguments::is_obsolete_flag(const char *flag_name, JDK_Version* version) {
457 assert(version != NULL, "Must provide a version buffer");
458 SpecialFlag flag;
459 if (lookup_special_flag(flag_name, flag)) {
460 if (!flag.obsolete_in.is_undefined()) {
461 if (version_less_than(JDK_Version::current(), flag.expired_in)) {
462 *version = flag.obsolete_in;
463 return true;
464 }
465 }
466 }
467 return false;
468 }
469
470 int Arguments::is_deprecated_flag(const char *flag_name, JDK_Version* version) {
471 assert(version != NULL, "Must provide a version buffer");
472 SpecialFlag flag;
473 if (lookup_special_flag(flag_name, flag)) {
474 if (!flag.deprecated_in.is_undefined()) {
475 if (version_less_than(JDK_Version::current(), flag.obsolete_in) &&
476 version_less_than(JDK_Version::current(), flag.expired_in)) {
477 *version = flag.deprecated_in;
478 return 1;
479 } else {
480 return -1;
481 }
482 }
483 }
484 return 0;
485 }
486
487 #ifndef PRODUCT
488 const char* Arguments::removed_develop_logging_flag_name(const char* name){
489 for (size_t i = 0; removed_develop_logging_flags[i].alias_name != NULL; i++) {
490 const AliasedFlag& flag = removed_develop_logging_flags[i];
491 if (strcmp(flag.alias_name, name) == 0) {
492 return flag.real_name;
493 }
494 }
495 return NULL;
496 }
497 #endif // PRODUCT
498
499 const char* Arguments::real_flag_name(const char *flag_name) {
500 for (size_t i = 0; aliased_jvm_flags[i].alias_name != NULL; i++) {
501 const AliasedFlag& flag_status = aliased_jvm_flags[i];
502 if (strcmp(flag_status.alias_name, flag_name) == 0) {
503 return flag_status.real_name;
504 }
505 }
506 return flag_name;
507 }
508
509 #ifdef ASSERT
510 static bool lookup_special_flag(const char *flag_name, size_t skip_index) {
511 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
512 if ((i != skip_index) && (strcmp(special_jvm_flags[i].name, flag_name) == 0)) {
513 return true;
514 }
515 }
516 return false;
517 }
518
519 static bool verify_special_jvm_flags() {
520 bool success = true;
521 for (size_t i = 0; special_jvm_flags[i].name != NULL; i++) {
522 const SpecialFlag& flag = special_jvm_flags[i];
523 if (lookup_special_flag(flag.name, i)) {
524 warning("Duplicate special flag declaration \"%s\"", flag.name);
525 success = false;
526 }
527 if (flag.deprecated_in.is_undefined() &&
528 flag.obsolete_in.is_undefined()) {
529 warning("Special flag entry \"%s\" must declare version deprecated and/or obsoleted in.", flag.name);
530 success = false;
531 }
532
533 if (!flag.deprecated_in.is_undefined()) {
534 if (!version_less_than(flag.deprecated_in, flag.obsolete_in)) {
535 warning("Special flag entry \"%s\" must be deprecated before obsoleted.", flag.name);
536 success = false;
537 }
538
539 if (!version_less_than(flag.deprecated_in, flag.expired_in)) {
540 warning("Special flag entry \"%s\" must be deprecated before expired.", flag.name);
541 success = false;
542 }
543 }
544
545 if (!flag.obsolete_in.is_undefined()) {
546 if (!version_less_than(flag.obsolete_in, flag.expired_in)) {
547 warning("Special flag entry \"%s\" must be obsoleted before expired.", flag.name);
548 success = false;
549 }
550
551 // if flag has become obsolete it should not have a "globals" flag defined anymore.
552 if (!version_less_than(JDK_Version::current(), flag.obsolete_in)) {
553 if (Flag::find_flag(flag.name) != NULL) {
554 warning("Global variable for obsolete special flag entry \"%s\" should be removed", flag.name);
555 success = false;
556 }
557 }
558 }
559
560 if (!flag.expired_in.is_undefined()) {
561 // if flag has become expired it should not have a "globals" flag defined anymore.
562 if (!version_less_than(JDK_Version::current(), flag.expired_in)) {
563 if (Flag::find_flag(flag.name) != NULL) {
564 warning("Global variable for expired flag entry \"%s\" should be removed", flag.name);
565 success = false;
566 }
567 }
568 }
569
570 }
571 return success;
572 }
573 #endif
574
575 // Constructs the system class path (aka boot class path) from the following
576 // components, in order:
577 //
578 // prefix // from -Xbootclasspath/p:...
579 // base // from os::get_system_properties() or -Xbootclasspath=
580 // suffix // from -Xbootclasspath/a:...
581 //
582 // This could be AllStatic, but it isn't needed after argument processing is
583 // complete.
584 class SysClassPath: public StackObj {
585 public:
586 SysClassPath(const char* base);
587 ~SysClassPath();
588
589 inline void set_base(const char* base);
590 inline void add_prefix(const char* prefix);
591 inline void add_suffix_to_prefix(const char* suffix);
592 inline void add_suffix(const char* suffix);
593 inline void reset_path(const char* base);
594
595 inline const char* get_base() const { return _items[_scp_base]; }
596 inline const char* get_prefix() const { return _items[_scp_prefix]; }
597 inline const char* get_suffix() const { return _items[_scp_suffix]; }
598
599 // Combine all the components into a single c-heap-allocated string; caller
600 // must free the string if/when no longer needed.
601 char* combined_path();
602
603 private:
604 // Utility routines.
605 static char* add_to_path(const char* path, const char* str, bool prepend);
606 static char* add_jars_to_path(char* path, const char* directory);
607
608 inline void reset_item_at(int index);
609
610 // Array indices for the items that make up the sysclasspath. All except the
611 // base are allocated in the C heap and freed by this class.
612 enum {
613 _scp_prefix, // from -Xbootclasspath/p:...
614 _scp_base, // the default sysclasspath
615 _scp_suffix, // from -Xbootclasspath/a:...
616 _scp_nitems // the number of items, must be last.
617 };
618
619 const char* _items[_scp_nitems];
620 };
621
622 SysClassPath::SysClassPath(const char* base) {
623 memset(_items, 0, sizeof(_items));
624 _items[_scp_base] = base;
625 }
626
627 SysClassPath::~SysClassPath() {
628 // Free everything except the base.
629 for (int i = 0; i < _scp_nitems; ++i) {
630 if (i != _scp_base) reset_item_at(i);
631 }
632 }
633
634 inline void SysClassPath::set_base(const char* base) {
635 _items[_scp_base] = base;
636 }
637
638 inline void SysClassPath::add_prefix(const char* prefix) {
639 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], prefix, true);
640 }
641
642 inline void SysClassPath::add_suffix_to_prefix(const char* suffix) {
643 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], suffix, false);
644 }
645
646 inline void SysClassPath::add_suffix(const char* suffix) {
647 _items[_scp_suffix] = add_to_path(_items[_scp_suffix], suffix, false);
648 }
649
650 inline void SysClassPath::reset_item_at(int index) {
651 assert(index < _scp_nitems && index != _scp_base, "just checking");
652 if (_items[index] != NULL) {
653 FREE_C_HEAP_ARRAY(char, _items[index]);
654 _items[index] = NULL;
655 }
656 }
657
658 inline void SysClassPath::reset_path(const char* base) {
659 // Clear the prefix and suffix.
660 reset_item_at(_scp_prefix);
661 reset_item_at(_scp_suffix);
662 set_base(base);
663 }
664
665 //------------------------------------------------------------------------------
666
667
668 // Combine the bootclasspath elements, some of which may be null, into a single
669 // c-heap-allocated string.
670 char* SysClassPath::combined_path() {
671 assert(_items[_scp_base] != NULL, "empty default sysclasspath");
672
673 size_t lengths[_scp_nitems];
674 size_t total_len = 0;
675
676 const char separator = *os::path_separator();
677
678 // Get the lengths.
679 int i;
680 for (i = 0; i < _scp_nitems; ++i) {
681 if (_items[i] != NULL) {
682 lengths[i] = strlen(_items[i]);
683 // Include space for the separator char (or a NULL for the last item).
684 total_len += lengths[i] + 1;
685 }
686 }
687 assert(total_len > 0, "empty sysclasspath not allowed");
688
689 // Copy the _items to a single string.
690 char* cp = NEW_C_HEAP_ARRAY(char, total_len, mtInternal);
691 char* cp_tmp = cp;
692 for (i = 0; i < _scp_nitems; ++i) {
693 if (_items[i] != NULL) {
694 memcpy(cp_tmp, _items[i], lengths[i]);
695 cp_tmp += lengths[i];
696 *cp_tmp++ = separator;
697 }
698 }
699 *--cp_tmp = '\0'; // Replace the extra separator.
700 return cp;
701 }
702
703 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null.
704 char*
705 SysClassPath::add_to_path(const char* path, const char* str, bool prepend) {
706 char *cp;
707
708 assert(str != NULL, "just checking");
709 if (path == NULL) {
710 size_t len = strlen(str) + 1;
711 cp = NEW_C_HEAP_ARRAY(char, len, mtInternal);
712 memcpy(cp, str, len); // copy the trailing null
713 } else {
714 const char separator = *os::path_separator();
715 size_t old_len = strlen(path);
716 size_t str_len = strlen(str);
717 size_t len = old_len + str_len + 2;
718
719 if (prepend) {
720 cp = NEW_C_HEAP_ARRAY(char, len, mtInternal);
721 char* cp_tmp = cp;
722 memcpy(cp_tmp, str, str_len);
723 cp_tmp += str_len;
724 *cp_tmp = separator;
725 memcpy(++cp_tmp, path, old_len + 1); // copy the trailing null
726 FREE_C_HEAP_ARRAY(char, path);
727 } else {
728 cp = REALLOC_C_HEAP_ARRAY(char, path, len, mtInternal);
729 char* cp_tmp = cp + old_len;
730 *cp_tmp = separator;
731 memcpy(++cp_tmp, str, str_len + 1); // copy the trailing null
732 }
733 }
734 return cp;
735 }
736
737 // Scan the directory and append any jar or zip files found to path.
738 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null.
739 char* SysClassPath::add_jars_to_path(char* path, const char* directory) {
740 DIR* dir = os::opendir(directory);
741 if (dir == NULL) return path;
742
743 char dir_sep[2] = { '\0', '\0' };
744 size_t directory_len = strlen(directory);
745 const char fileSep = *os::file_separator();
746 if (directory[directory_len - 1] != fileSep) dir_sep[0] = fileSep;
747
748 /* Scan the directory for jars/zips, appending them to path. */
749 struct dirent *entry;
750 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtInternal);
751 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL) {
752 const char* name = entry->d_name;
753 const char* ext = name + strlen(name) - 4;
754 bool isJarOrZip = ext > name &&
755 (os::file_name_strcmp(ext, ".jar") == 0 ||
756 os::file_name_strcmp(ext, ".zip") == 0);
757 if (isJarOrZip) {
758 char* jarpath = NEW_C_HEAP_ARRAY(char, directory_len + 2 + strlen(name), mtInternal);
759 sprintf(jarpath, "%s%s%s", directory, dir_sep, name);
760 path = add_to_path(path, jarpath, false);
761 FREE_C_HEAP_ARRAY(char, jarpath);
762 }
763 }
764 FREE_C_HEAP_ARRAY(char, dbuf);
765 os::closedir(dir);
766 return path;
767 }
768
769 // Parses a memory size specification string.
770 static bool atomull(const char *s, julong* result) {
771 julong n = 0;
772 int args_read = 0;
773 bool is_hex = false;
774 // Skip leading 0[xX] for hexadecimal
775 if (*s =='0' && (*(s+1) == 'x' || *(s+1) == 'X')) {
776 s += 2;
777 is_hex = true;
778 args_read = sscanf(s, JULONG_FORMAT_X, &n);
779 } else {
780 args_read = sscanf(s, JULONG_FORMAT, &n);
781 }
782 if (args_read != 1) {
783 return false;
784 }
785 while (*s != '\0' && (isdigit(*s) || (is_hex && isxdigit(*s)))) {
786 s++;
787 }
788 // 4705540: illegal if more characters are found after the first non-digit
789 if (strlen(s) > 1) {
790 return false;
791 }
792 switch (*s) {
793 case 'T': case 't':
794 *result = n * G * K;
795 // Check for overflow.
796 if (*result/((julong)G * K) != n) return false;
797 return true;
798 case 'G': case 'g':
799 *result = n * G;
800 if (*result/G != n) return false;
801 return true;
802 case 'M': case 'm':
803 *result = n * M;
804 if (*result/M != n) return false;
805 return true;
806 case 'K': case 'k':
807 *result = n * K;
808 if (*result/K != n) return false;
809 return true;
810 case '\0':
811 *result = n;
812 return true;
813 default:
814 return false;
815 }
816 }
817
818 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size) {
819 if (size < min_size) return arg_too_small;
820 // Check that size will fit in a size_t (only relevant on 32-bit)
821 if (size > max_uintx) return arg_too_big;
822 return arg_in_range;
823 }
824
825 // Describe an argument out of range error
826 void Arguments::describe_range_error(ArgsRange errcode) {
827 switch(errcode) {
828 case arg_too_big:
829 jio_fprintf(defaultStream::error_stream(),
830 "The specified size exceeds the maximum "
831 "representable size.\n");
832 break;
833 case arg_too_small:
834 case arg_unreadable:
835 case arg_in_range:
836 // do nothing for now
837 break;
838 default:
839 ShouldNotReachHere();
840 }
841 }
842
843 static bool set_bool_flag(const char* name, bool value, Flag::Flags origin) {
844 if (CommandLineFlags::boolAtPut(name, &value, origin) == Flag::SUCCESS) {
845 return true;
846 } else {
847 return false;
848 }
849 }
850
851 static bool set_fp_numeric_flag(const char* name, char* value, Flag::Flags origin) {
852 char* end;
853 errno = 0;
854 double v = strtod(value, &end);
855 if ((errno != 0) || (*end != 0)) {
856 return false;
857 }
858
859 if (CommandLineFlags::doubleAtPut(name, &v, origin) == Flag::SUCCESS) {
860 return true;
861 }
862 return false;
863 }
864
865 static bool set_numeric_flag(const char* name, char* value, Flag::Flags origin) {
866 julong v;
867 int int_v;
868 intx intx_v;
869 bool is_neg = false;
870 Flag* result = Flag::find_flag(name, strlen(name));
871
872 if (result == NULL) {
873 return false;
874 }
875
876 // Check the sign first since atomull() parses only unsigned values.
877 if (*value == '-') {
878 if (!result->is_intx() && !result->is_int()) {
879 return false;
880 }
881 value++;
882 is_neg = true;
883 }
884 if (!atomull(value, &v)) {
885 return false;
886 }
887 if (result->is_int()) {
888 int_v = (int) v;
889 if (is_neg) {
890 int_v = -int_v;
891 }
892 return CommandLineFlags::intAtPut(result, &int_v, origin) == Flag::SUCCESS;
893 } else if (result->is_uint()) {
894 uint uint_v = (uint) v;
895 return CommandLineFlags::uintAtPut(result, &uint_v, origin) == Flag::SUCCESS;
896 } else if (result->is_intx()) {
897 intx_v = (intx) v;
898 if (is_neg) {
899 intx_v = -intx_v;
900 }
901 return CommandLineFlags::intxAtPut(result, &intx_v, origin) == Flag::SUCCESS;
902 } else if (result->is_uintx()) {
903 uintx uintx_v = (uintx) v;
904 return CommandLineFlags::uintxAtPut(result, &uintx_v, origin) == Flag::SUCCESS;
905 } else if (result->is_uint64_t()) {
906 uint64_t uint64_t_v = (uint64_t) v;
907 return CommandLineFlags::uint64_tAtPut(result, &uint64_t_v, origin) == Flag::SUCCESS;
908 } else if (result->is_size_t()) {
909 size_t size_t_v = (size_t) v;
910 return CommandLineFlags::size_tAtPut(result, &size_t_v, origin) == Flag::SUCCESS;
911 } else {
912 return false;
913 }
914 }
915
916 static bool set_string_flag(const char* name, const char* value, Flag::Flags origin) {
917 if (CommandLineFlags::ccstrAtPut(name, &value, origin) != Flag::SUCCESS) return false;
918 // Contract: CommandLineFlags always returns a pointer that needs freeing.
919 FREE_C_HEAP_ARRAY(char, value);
920 return true;
921 }
922
923 static bool append_to_string_flag(const char* name, const char* new_value, Flag::Flags origin) {
924 const char* old_value = "";
925 if (CommandLineFlags::ccstrAt(name, &old_value) != Flag::SUCCESS) return false;
926 size_t old_len = old_value != NULL ? strlen(old_value) : 0;
927 size_t new_len = strlen(new_value);
928 const char* value;
929 char* free_this_too = NULL;
930 if (old_len == 0) {
931 value = new_value;
932 } else if (new_len == 0) {
933 value = old_value;
934 } else {
935 char* buf = NEW_C_HEAP_ARRAY(char, old_len + 1 + new_len + 1, mtInternal);
936 // each new setting adds another LINE to the switch:
937 sprintf(buf, "%s\n%s", old_value, new_value);
938 value = buf;
939 free_this_too = buf;
940 }
941 (void) CommandLineFlags::ccstrAtPut(name, &value, origin);
942 // CommandLineFlags always returns a pointer that needs freeing.
943 FREE_C_HEAP_ARRAY(char, value);
944 if (free_this_too != NULL) {
945 // CommandLineFlags made its own copy, so I must delete my own temp. buffer.
946 FREE_C_HEAP_ARRAY(char, free_this_too);
947 }
948 return true;
949 }
950
951 const char* Arguments::handle_aliases_and_deprecation(const char* arg, bool warn) {
952 const char* real_name = real_flag_name(arg);
953 JDK_Version since = JDK_Version();
954 switch (is_deprecated_flag(arg, &since)) {
955 case -1:
956 return NULL; // obsolete or expired, don't process normally
957 case 0:
958 return real_name;
959 case 1: {
960 if (warn) {
961 char version[256];
962 since.to_string(version, sizeof(version));
963 if (real_name != arg) {
964 warning("Option %s was deprecated in version %s and will likely be removed in a future release. Use option %s instead.",
965 arg, version, real_name);
966 } else {
967 warning("Option %s was deprecated in version %s and will likely be removed in a future release.",
968 arg, version);
969 }
970 }
971 return real_name;
972 }
973 }
974 ShouldNotReachHere();
975 return NULL;
976 }
977
978 void log_deprecated_flag( const char* name, const char* pref, AliasedLoggingFlag alf) {
979 LogTagType tagSet[5] = {alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4};
980 // Set tagset string buffer at max size of 256, large enough for any alias tagset
981 int max_tagset_size = 256;
982 char tagset_buffer[max_tagset_size];
983 memset(tagset_buffer, 0, max_tagset_size);
984
985 // Write tag-set for aliased logging option, in string list form
986 for (int i = 0; i < 5 && tagSet[i] != LogTag::__NO_TAG; i++) {
987 if (i > 0) {
988 strncat(tagset_buffer, ",", 1);
989 }
990 strncat(tagset_buffer, LogTag::name(tagSet[i]), max_tagset_size - strlen(tagset_buffer));
991 }
992
993 log_warning(arguments)("-XX:%s%s is deprecated. Will use -Xlog:%s=%s instead.",
994 pref,
995 name,
996 tagset_buffer,
997 (pref == "-") ? "off" : LogLevel::name(alf.level));
998 }
999
1000 AliasedLoggingFlag Arguments::catch_logging_aliases(const char* name, const char* pref){
1001 for (size_t i = 0; aliased_logging_flags[i].alias_name != NULL; i++) {
1002 const AliasedLoggingFlag& alf = aliased_logging_flags[i];
1003 if (strcmp(alf.alias_name, name) == 0) {
1004 log_deprecated_flag(name, pref, alf);
1005 return alf;
1006 }
1007 }
1008 AliasedLoggingFlag a = {NULL, LogLevel::Off, false, LOG_TAGS(_NO_TAG)};
1009 return a;
1010 }
1011
1012 bool Arguments::parse_argument(const char* arg, Flag::Flags origin) {
1013
1014 // range of acceptable characters spelled out for portability reasons
1015 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]"
1016 #define BUFLEN 255
1017 char name[BUFLEN+1];
1018 char dummy;
1019 const char* real_name;
1020 bool warn_if_deprecated = true;
1021
1022 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
1023 AliasedLoggingFlag alf = catch_logging_aliases(name, "-");
1024 if (alf.alias_name != NULL){
1025 LogConfiguration::configure_stdout(LogLevel::Off, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
1026 return true;
1027 }
1028 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1029 if (real_name == NULL) {
1030 return false;
1031 }
1032 return set_bool_flag(real_name, false, origin);
1033 }
1034 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
1035 AliasedLoggingFlag alf = catch_logging_aliases(name, "+");
1036 if (alf.alias_name != NULL){
1037 LogConfiguration::configure_stdout(alf.level, alf.exactMatch, alf.tag0, alf.tag1, alf.tag2, alf.tag3, alf.tag4, alf.tag5);
1038 return true;
1039 }
1040 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1041 if (real_name == NULL) {
1042 return false;
1043 }
1044 return set_bool_flag(real_name, true, origin);
1045 }
1046
1047 char punct;
1048 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') {
1049 const char* value = strchr(arg, '=') + 1;
1050 Flag* flag;
1051
1052 // this scanf pattern matches both strings (handled here) and numbers (handled later))
1053 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1054 if (real_name == NULL) {
1055 return false;
1056 }
1057 flag = Flag::find_flag(real_name);
1058 if (flag != NULL && flag->is_ccstr()) {
1059 if (flag->ccstr_accumulates()) {
1060 return append_to_string_flag(real_name, value, origin);
1061 } else {
1062 if (value[0] == '\0') {
1063 value = NULL;
1064 }
1065 return set_string_flag(real_name, value, origin);
1066 }
1067 } else {
1068 warn_if_deprecated = false; // if arg is deprecated, we've already done warning...
1069 }
1070 }
1071
1072 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') {
1073 const char* value = strchr(arg, '=') + 1;
1074 // -XX:Foo:=xxx will reset the string flag to the given value.
1075 if (value[0] == '\0') {
1076 value = NULL;
1077 }
1078 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1079 if (real_name == NULL) {
1080 return false;
1081 }
1082 return set_string_flag(real_name, value, origin);
1083 }
1084
1085 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.eE+]"
1086 #define SIGNED_NUMBER_RANGE "[-0123456789]"
1087 #define NUMBER_RANGE "[0123456789eE+-]"
1088 char value[BUFLEN + 1];
1089 char value2[BUFLEN + 1];
1090 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) {
1091 // Looks like a floating-point number -- try again with more lenient format string
1092 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) {
1093 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1094 if (real_name == NULL) {
1095 return false;
1096 }
1097 return set_fp_numeric_flag(real_name, value, origin);
1098 }
1099 }
1100
1101 #define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]"
1102 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) {
1103 real_name = handle_aliases_and_deprecation(name, warn_if_deprecated);
1104 if (real_name == NULL) {
1105 return false;
1106 }
1107 return set_numeric_flag(real_name, value, origin);
1108 }
1109
1110 return false;
1111 }
1112
1113 void Arguments::add_string(char*** bldarray, int* count, const char* arg) {
1114 assert(bldarray != NULL, "illegal argument");
1115
1116 if (arg == NULL) {
1117 return;
1118 }
1119
1120 int new_count = *count + 1;
1121
1122 // expand the array and add arg to the last element
1123 if (*bldarray == NULL) {
1124 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtInternal);
1125 } else {
1126 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtInternal);
1127 }
1128 (*bldarray)[*count] = os::strdup_check_oom(arg);
1129 *count = new_count;
1130 }
1131
1132 void Arguments::build_jvm_args(const char* arg) {
1133 add_string(&_jvm_args_array, &_num_jvm_args, arg);
1134 }
1135
1136 void Arguments::build_jvm_flags(const char* arg) {
1137 add_string(&_jvm_flags_array, &_num_jvm_flags, arg);
1138 }
1139
1140 // utility function to return a string that concatenates all
1141 // strings in a given char** array
1142 const char* Arguments::build_resource_string(char** args, int count) {
1143 if (args == NULL || count == 0) {
1144 return NULL;
1145 }
1146 size_t length = strlen(args[0]) + 1; // add 1 for the null terminator
1147 for (int i = 1; i < count; i++) {
1148 length += strlen(args[i]) + 1; // add 1 for a space
1149 }
1150 char* s = NEW_RESOURCE_ARRAY(char, length);
1151 strcpy(s, args[0]);
1152 for (int j = 1; j < count; j++) {
1153 strcat(s, " ");
1154 strcat(s, args[j]);
1155 }
1156 return (const char*) s;
1157 }
1158
1159 void Arguments::print_on(outputStream* st) {
1160 st->print_cr("VM Arguments:");
1161 if (num_jvm_flags() > 0) {
1162 st->print("jvm_flags: "); print_jvm_flags_on(st);
1163 st->cr();
1164 }
1165 if (num_jvm_args() > 0) {
1166 st->print("jvm_args: "); print_jvm_args_on(st);
1167 st->cr();
1168 }
1169 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>");
1170 if (_java_class_path != NULL) {
1171 char* path = _java_class_path->value();
1172 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path );
1173 }
1174 st->print_cr("Launcher Type: %s", _sun_java_launcher);
1175 }
1176
1177 void Arguments::print_summary_on(outputStream* st) {
1178 // Print the command line. Environment variables that are helpful for
1179 // reproducing the problem are written later in the hs_err file.
1180 // flags are from setting file
1181 if (num_jvm_flags() > 0) {
1182 st->print_raw("Settings File: ");
1183 print_jvm_flags_on(st);
1184 st->cr();
1185 }
1186 // args are the command line and environment variable arguments.
1187 st->print_raw("Command Line: ");
1188 if (num_jvm_args() > 0) {
1189 print_jvm_args_on(st);
1190 }
1191 // this is the classfile and any arguments to the java program
1192 if (java_command() != NULL) {
1193 st->print("%s", java_command());
1194 }
1195 st->cr();
1196 }
1197
1198 void Arguments::print_jvm_flags_on(outputStream* st) {
1199 if (_num_jvm_flags > 0) {
1200 for (int i=0; i < _num_jvm_flags; i++) {
1201 st->print("%s ", _jvm_flags_array[i]);
1202 }
1203 }
1204 }
1205
1206 void Arguments::print_jvm_args_on(outputStream* st) {
1207 if (_num_jvm_args > 0) {
1208 for (int i=0; i < _num_jvm_args; i++) {
1209 st->print("%s ", _jvm_args_array[i]);
1210 }
1211 }
1212 }
1213
1214 bool Arguments::process_argument(const char* arg,
1215 jboolean ignore_unrecognized,
1216 Flag::Flags origin) {
1217 JDK_Version since = JDK_Version();
1218
1219 if (parse_argument(arg, origin)) {
1220 return true;
1221 }
1222
1223 // Determine if the flag has '+', '-', or '=' characters.
1224 bool has_plus_minus = (*arg == '+' || *arg == '-');
1225 const char* const argname = has_plus_minus ? arg + 1 : arg;
1226
1227 size_t arg_len;
1228 const char* equal_sign = strchr(argname, '=');
1229 if (equal_sign == NULL) {
1230 arg_len = strlen(argname);
1231 } else {
1232 arg_len = equal_sign - argname;
1233 }
1234
1235 // Only make the obsolete check for valid arguments.
1236 if (arg_len <= BUFLEN) {
1237 // Construct a string which consists only of the argument name without '+', '-', or '='.
1238 char stripped_argname[BUFLEN+1];
1239 strncpy(stripped_argname, argname, arg_len);
1240 stripped_argname[arg_len] = '\0'; // strncpy may not null terminate.
1241 if (is_obsolete_flag(stripped_argname, &since)) {
1242 char version[256];
1243 since.to_string(version, sizeof(version));
1244 warning("Ignoring option %s; support was removed in %s", stripped_argname, version);
1245 return true;
1246 }
1247 #ifndef PRODUCT
1248 else {
1249 const char* replacement;
1250 if ((replacement = removed_develop_logging_flag_name(stripped_argname)) != NULL){
1251 log_warning(arguments)("%s has been removed. Please use %s instead.",
1252 stripped_argname,
1253 replacement);
1254 return false;
1255 }
1256 }
1257 #endif //PRODUCT
1258 }
1259
1260 // For locked flags, report a custom error message if available.
1261 // Otherwise, report the standard unrecognized VM option.
1262 Flag* found_flag = Flag::find_flag((const char*)argname, arg_len, true, true);
1263 if (found_flag != NULL) {
1264 char locked_message_buf[BUFLEN];
1265 Flag::MsgType msg_type = found_flag->get_locked_message(locked_message_buf, BUFLEN);
1266 if (strlen(locked_message_buf) == 0) {
1267 if (found_flag->is_bool() && !has_plus_minus) {
1268 jio_fprintf(defaultStream::error_stream(),
1269 "Missing +/- setting for VM option '%s'\n", argname);
1270 } else if (!found_flag->is_bool() && has_plus_minus) {
1271 jio_fprintf(defaultStream::error_stream(),
1272 "Unexpected +/- setting in VM option '%s'\n", argname);
1273 } else {
1274 jio_fprintf(defaultStream::error_stream(),
1275 "Improperly specified VM option '%s'\n", argname);
1276 }
1277 } else {
1278 #ifdef PRODUCT
1279 bool mismatched = ((msg_type == Flag::NOTPRODUCT_FLAG_BUT_PRODUCT_BUILD) ||
1280 (msg_type == Flag::DEVELOPER_FLAG_BUT_PRODUCT_BUILD));
1281 if (ignore_unrecognized && mismatched) {
1282 return true;
1283 }
1284 #endif
1285 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf);
1286 }
1287 } else {
1288 if (ignore_unrecognized) {
1289 return true;
1290 }
1291 jio_fprintf(defaultStream::error_stream(),
1292 "Unrecognized VM option '%s'\n", argname);
1293 Flag* fuzzy_matched = Flag::fuzzy_match((const char*)argname, arg_len, true);
1294 if (fuzzy_matched != NULL) {
1295 jio_fprintf(defaultStream::error_stream(),
1296 "Did you mean '%s%s%s'? ",
1297 (fuzzy_matched->is_bool()) ? "(+/-)" : "",
1298 fuzzy_matched->_name,
1299 (fuzzy_matched->is_bool()) ? "" : "=<value>");
1300 }
1301 }
1302
1303 // allow for commandline "commenting out" options like -XX:#+Verbose
1304 return arg[0] == '#';
1305 }
1306
1307 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) {
1308 FILE* stream = fopen(file_name, "rb");
1309 if (stream == NULL) {
1310 if (should_exist) {
1311 jio_fprintf(defaultStream::error_stream(),
1312 "Could not open settings file %s\n", file_name);
1313 return false;
1314 } else {
1315 return true;
1316 }
1317 }
1318
1319 char token[1024];
1320 int pos = 0;
1321
1322 bool in_white_space = true;
1323 bool in_comment = false;
1324 bool in_quote = false;
1325 char quote_c = 0;
1326 bool result = true;
1327
1328 int c = getc(stream);
1329 while(c != EOF && pos < (int)(sizeof(token)-1)) {
1330 if (in_white_space) {
1331 if (in_comment) {
1332 if (c == '\n') in_comment = false;
1333 } else {
1334 if (c == '#') in_comment = true;
1335 else if (!isspace(c)) {
1336 in_white_space = false;
1337 token[pos++] = c;
1338 }
1339 }
1340 } else {
1341 if (c == '\n' || (!in_quote && isspace(c))) {
1342 // token ends at newline, or at unquoted whitespace
1343 // this allows a way to include spaces in string-valued options
1344 token[pos] = '\0';
1345 logOption(token);
1346 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
1347 build_jvm_flags(token);
1348 pos = 0;
1349 in_white_space = true;
1350 in_quote = false;
1351 } else if (!in_quote && (c == '\'' || c == '"')) {
1352 in_quote = true;
1353 quote_c = c;
1354 } else if (in_quote && (c == quote_c)) {
1355 in_quote = false;
1356 } else {
1357 token[pos++] = c;
1358 }
1359 }
1360 c = getc(stream);
1361 }
1362 if (pos > 0) {
1363 token[pos] = '\0';
1364 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
1365 build_jvm_flags(token);
1366 }
1367 fclose(stream);
1368 return result;
1369 }
1370
1371 //=============================================================================================================
1372 // Parsing of properties (-D)
1373
1374 const char* Arguments::get_property(const char* key) {
1375 return PropertyList_get_value(system_properties(), key);
1376 }
1377
1378 bool Arguments::add_property(const char* prop) {
1379 const char* eq = strchr(prop, '=');
1380 const char* key;
1381 const char* value = "";
1382
1383 if (eq == NULL) {
1384 // property doesn't have a value, thus use passed string
1385 key = prop;
1386 } else {
1387 // property have a value, thus extract it and save to the
1388 // allocated string
1389 size_t key_len = eq - prop;
1390 char* tmp_key = AllocateHeap(key_len + 1, mtInternal);
1391
1392 strncpy(tmp_key, prop, key_len);
1393 tmp_key[key_len] = '\0';
1394 key = tmp_key;
1395
1396 value = &prop[key_len + 1];
1397 }
1398
1399 if (strcmp(key, "java.compiler") == 0) {
1400 process_java_compiler_argument(value);
1401 // Record value in Arguments, but let it get passed to Java.
1402 } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 ||
1403 strcmp(key, "sun.java.launcher.pid") == 0) {
1404 // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are
1405 // private and are processed in process_sun_java_launcher_properties();
1406 // the sun.java.launcher property is passed on to the java application
1407 } else if (strcmp(key, "sun.boot.library.path") == 0) {
1408 PropertyList_unique_add(&_system_properties, key, value, true);
1409 } else {
1410 if (strcmp(key, "sun.java.command") == 0) {
1411 char *old_java_command = _java_command;
1412 _java_command = os::strdup_check_oom(value, mtInternal);
1413 if (old_java_command != NULL) {
1414 os::free(old_java_command);
1415 }
1416 } else if (strcmp(key, "java.vendor.url.bug") == 0) {
1417 const char* old_java_vendor_url_bug = _java_vendor_url_bug;
1418 // save it in _java_vendor_url_bug, so JVM fatal error handler can access
1419 // its value without going through the property list or making a Java call.
1420 _java_vendor_url_bug = os::strdup_check_oom(value, mtInternal);
1421 if (old_java_vendor_url_bug != DEFAULT_VENDOR_URL_BUG) {
1422 assert(old_java_vendor_url_bug != NULL, "_java_vendor_url_bug is NULL");
1423 os::free((void *)old_java_vendor_url_bug);
1424 }
1425 }
1426
1427 // Create new property and add at the end of the list
1428 PropertyList_unique_add(&_system_properties, key, value);
1429 }
1430
1431 if (key != prop) {
1432 // SystemProperty copy passed value, thus free previously allocated
1433 // memory
1434 FreeHeap((void *)key);
1435 }
1436
1437 return true;
1438 }
1439
1440 //===========================================================================================================
1441 // Setting int/mixed/comp mode flags
1442
1443 void Arguments::set_mode_flags(Mode mode) {
1444 // Set up default values for all flags.
1445 // If you add a flag to any of the branches below,
1446 // add a default value for it here.
1447 set_java_compiler(false);
1448 _mode = mode;
1449
1450 // Ensure Agent_OnLoad has the correct initial values.
1451 // This may not be the final mode; mode may change later in onload phase.
1452 PropertyList_unique_add(&_system_properties, "java.vm.info",
1453 VM_Version::vm_info_string(), false);
1454
1455 UseInterpreter = true;
1456 UseCompiler = true;
1457 UseLoopCounter = true;
1458
1459 // Default values may be platform/compiler dependent -
1460 // use the saved values
1461 ClipInlining = Arguments::_ClipInlining;
1462 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods;
1463 UseOnStackReplacement = Arguments::_UseOnStackReplacement;
1464 BackgroundCompilation = Arguments::_BackgroundCompilation;
1465 if (TieredCompilation) {
1466 if (FLAG_IS_DEFAULT(Tier3InvokeNotifyFreqLog)) {
1467 Tier3InvokeNotifyFreqLog = Arguments::_Tier3InvokeNotifyFreqLog;
1468 }
1469 if (FLAG_IS_DEFAULT(Tier4InvocationThreshold)) {
1470 Tier4InvocationThreshold = Arguments::_Tier4InvocationThreshold;
1471 }
1472 }
1473
1474 // Change from defaults based on mode
1475 switch (mode) {
1476 default:
1477 ShouldNotReachHere();
1478 break;
1479 case _int:
1480 UseCompiler = false;
1481 UseLoopCounter = false;
1482 AlwaysCompileLoopMethods = false;
1483 UseOnStackReplacement = false;
1484 break;
1485 case _mixed:
1486 // same as default
1487 break;
1488 case _comp:
1489 UseInterpreter = false;
1490 BackgroundCompilation = false;
1491 ClipInlining = false;
1492 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more.
1493 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and
1494 // compile a level 4 (C2) and then continue executing it.
1495 if (TieredCompilation) {
1496 Tier3InvokeNotifyFreqLog = 0;
1497 Tier4InvocationThreshold = 0;
1498 }
1499 break;
1500 }
1501 }
1502
1503 #if defined(COMPILER2) || INCLUDE_JVMCI || defined(_LP64) || !INCLUDE_CDS
1504 // Conflict: required to use shared spaces (-Xshare:on), but
1505 // incompatible command line options were chosen.
1506
1507 static void no_shared_spaces(const char* message) {
1508 if (RequireSharedSpaces) {
1509 jio_fprintf(defaultStream::error_stream(),
1510 "Class data sharing is inconsistent with other specified options.\n");
1511 vm_exit_during_initialization("Unable to use shared archive.", message);
1512 } else {
1513 FLAG_SET_DEFAULT(UseSharedSpaces, false);
1514 }
1515 }
1516 #endif
1517
1518 // Returns threshold scaled with the value of scale.
1519 // If scale < 0.0, threshold is returned without scaling.
1520 intx Arguments::scaled_compile_threshold(intx threshold, double scale) {
1521 if (scale == 1.0 || scale < 0.0) {
1522 return threshold;
1523 } else {
1524 return (intx)(threshold * scale);
1525 }
1526 }
1527
1528 // Returns freq_log scaled with the value of scale.
1529 // Returned values are in the range of [0, InvocationCounter::number_of_count_bits + 1].
1530 // If scale < 0.0, freq_log is returned without scaling.
1531 intx Arguments::scaled_freq_log(intx freq_log, double scale) {
1532 // Check if scaling is necessary or if negative value was specified.
1533 if (scale == 1.0 || scale < 0.0) {
1534 return freq_log;
1535 }
1536 // Check values to avoid calculating log2 of 0.
1537 if (scale == 0.0 || freq_log == 0) {
1538 return 0;
1539 }
1540 // Determine the maximum notification frequency value currently supported.
1541 // The largest mask value that the interpreter/C1 can handle is
1542 // of length InvocationCounter::number_of_count_bits. Mask values are always
1543 // one bit shorter then the value of the notification frequency. Set
1544 // max_freq_bits accordingly.
1545 intx max_freq_bits = InvocationCounter::number_of_count_bits + 1;
1546 intx scaled_freq = scaled_compile_threshold((intx)1 << freq_log, scale);
1547 if (scaled_freq == 0) {
1548 // Return 0 right away to avoid calculating log2 of 0.
1549 return 0;
1550 } else if (scaled_freq > nth_bit(max_freq_bits)) {
1551 return max_freq_bits;
1552 } else {
1553 return log2_intptr(scaled_freq);
1554 }
1555 }
1556
1557 void Arguments::set_tiered_flags() {
1558 // With tiered, set default policy to AdvancedThresholdPolicy, which is 3.
1559 if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) {
1560 FLAG_SET_DEFAULT(CompilationPolicyChoice, 3);
1561 }
1562 if (CompilationPolicyChoice < 2) {
1563 vm_exit_during_initialization(
1564 "Incompatible compilation policy selected", NULL);
1565 }
1566 // Increase the code cache size - tiered compiles a lot more.
1567 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
1568 FLAG_SET_ERGO(uintx, ReservedCodeCacheSize,
1569 MIN2(CODE_CACHE_DEFAULT_LIMIT, ReservedCodeCacheSize * 5));
1570 }
1571 // Enable SegmentedCodeCache if TieredCompilation is enabled and ReservedCodeCacheSize >= 240M
1572 if (FLAG_IS_DEFAULT(SegmentedCodeCache) && ReservedCodeCacheSize >= 240*M) {
1573 FLAG_SET_ERGO(bool, SegmentedCodeCache, true);
1574 }
1575 if (!UseInterpreter) { // -Xcomp
1576 Tier3InvokeNotifyFreqLog = 0;
1577 Tier4InvocationThreshold = 0;
1578 }
1579
1580 if (CompileThresholdScaling < 0) {
1581 vm_exit_during_initialization("Negative value specified for CompileThresholdScaling", NULL);
1582 }
1583
1584 // Scale tiered compilation thresholds.
1585 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves compilation thresholds unchanged.
1586 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
1587 FLAG_SET_ERGO(intx, Tier0InvokeNotifyFreqLog, scaled_freq_log(Tier0InvokeNotifyFreqLog));
1588 FLAG_SET_ERGO(intx, Tier0BackedgeNotifyFreqLog, scaled_freq_log(Tier0BackedgeNotifyFreqLog));
1589
1590 FLAG_SET_ERGO(intx, Tier3InvocationThreshold, scaled_compile_threshold(Tier3InvocationThreshold));
1591 FLAG_SET_ERGO(intx, Tier3MinInvocationThreshold, scaled_compile_threshold(Tier3MinInvocationThreshold));
1592 FLAG_SET_ERGO(intx, Tier3CompileThreshold, scaled_compile_threshold(Tier3CompileThreshold));
1593 FLAG_SET_ERGO(intx, Tier3BackEdgeThreshold, scaled_compile_threshold(Tier3BackEdgeThreshold));
1594
1595 // Tier2{Invocation,MinInvocation,Compile,Backedge}Threshold should be scaled here
1596 // once these thresholds become supported.
1597
1598 FLAG_SET_ERGO(intx, Tier2InvokeNotifyFreqLog, scaled_freq_log(Tier2InvokeNotifyFreqLog));
1599 FLAG_SET_ERGO(intx, Tier2BackedgeNotifyFreqLog, scaled_freq_log(Tier2BackedgeNotifyFreqLog));
1600
1601 FLAG_SET_ERGO(intx, Tier3InvokeNotifyFreqLog, scaled_freq_log(Tier3InvokeNotifyFreqLog));
1602 FLAG_SET_ERGO(intx, Tier3BackedgeNotifyFreqLog, scaled_freq_log(Tier3BackedgeNotifyFreqLog));
1603
1604 FLAG_SET_ERGO(intx, Tier23InlineeNotifyFreqLog, scaled_freq_log(Tier23InlineeNotifyFreqLog));
1605
1606 FLAG_SET_ERGO(intx, Tier4InvocationThreshold, scaled_compile_threshold(Tier4InvocationThreshold));
1607 FLAG_SET_ERGO(intx, Tier4MinInvocationThreshold, scaled_compile_threshold(Tier4MinInvocationThreshold));
1608 FLAG_SET_ERGO(intx, Tier4CompileThreshold, scaled_compile_threshold(Tier4CompileThreshold));
1609 FLAG_SET_ERGO(intx, Tier4BackEdgeThreshold, scaled_compile_threshold(Tier4BackEdgeThreshold));
1610 }
1611 }
1612
1613 #if INCLUDE_ALL_GCS
1614 static void disable_adaptive_size_policy(const char* collector_name) {
1615 if (UseAdaptiveSizePolicy) {
1616 if (FLAG_IS_CMDLINE(UseAdaptiveSizePolicy)) {
1617 warning("Disabling UseAdaptiveSizePolicy; it is incompatible with %s.",
1618 collector_name);
1619 }
1620 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false);
1621 }
1622 }
1623
1624 void Arguments::set_parnew_gc_flags() {
1625 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC && !UseG1GC,
1626 "control point invariant");
1627 assert(UseConcMarkSweepGC, "CMS is expected to be on here");
1628 assert(UseParNewGC, "ParNew should always be used with CMS");
1629
1630 if (FLAG_IS_DEFAULT(ParallelGCThreads)) {
1631 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads());
1632 assert(ParallelGCThreads > 0, "We should always have at least one thread by default");
1633 } else if (ParallelGCThreads == 0) {
1634 jio_fprintf(defaultStream::error_stream(),
1635 "The ParNew GC can not be combined with -XX:ParallelGCThreads=0\n");
1636 vm_exit(1);
1637 }
1638
1639 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 respectively,
1640 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration
1641 // we set them to 1024 and 1024.
1642 // See CR 6362902.
1643 if (FLAG_IS_DEFAULT(YoungPLABSize)) {
1644 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024);
1645 }
1646 if (FLAG_IS_DEFAULT(OldPLABSize)) {
1647 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024);
1648 }
1649
1650 // When using compressed oops, we use local overflow stacks,
1651 // rather than using a global overflow list chained through
1652 // the klass word of the object's pre-image.
1653 if (UseCompressedOops && !ParGCUseLocalOverflow) {
1654 if (!FLAG_IS_DEFAULT(ParGCUseLocalOverflow)) {
1655 warning("Forcing +ParGCUseLocalOverflow: needed if using compressed references");
1656 }
1657 FLAG_SET_DEFAULT(ParGCUseLocalOverflow, true);
1658 }
1659 assert(ParGCUseLocalOverflow || !UseCompressedOops, "Error");
1660 }
1661
1662 // Adjust some sizes to suit CMS and/or ParNew needs; these work well on
1663 // sparc/solaris for certain applications, but would gain from
1664 // further optimization and tuning efforts, and would almost
1665 // certainly gain from analysis of platform and environment.
1666 void Arguments::set_cms_and_parnew_gc_flags() {
1667 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC, "Error");
1668 assert(UseConcMarkSweepGC, "CMS is expected to be on here");
1669 assert(UseParNewGC, "ParNew should always be used with CMS");
1670
1671 // Turn off AdaptiveSizePolicy by default for cms until it is complete.
1672 disable_adaptive_size_policy("UseConcMarkSweepGC");
1673
1674 set_parnew_gc_flags();
1675
1676 size_t max_heap = align_size_down(MaxHeapSize,
1677 CardTableRS::ct_max_alignment_constraint());
1678
1679 // Now make adjustments for CMS
1680 intx tenuring_default = (intx)6;
1681 size_t young_gen_per_worker = CMSYoungGenPerWorker;
1682
1683 // Preferred young gen size for "short" pauses:
1684 // upper bound depends on # of threads and NewRatio.
1685 const size_t preferred_max_new_size_unaligned =
1686 MIN2(max_heap/(NewRatio+1), ScaleForWordSize(young_gen_per_worker * ParallelGCThreads));
1687 size_t preferred_max_new_size =
1688 align_size_up(preferred_max_new_size_unaligned, os::vm_page_size());
1689
1690 // Unless explicitly requested otherwise, size young gen
1691 // for "short" pauses ~ CMSYoungGenPerWorker*ParallelGCThreads
1692
1693 // If either MaxNewSize or NewRatio is set on the command line,
1694 // assume the user is trying to set the size of the young gen.
1695 if (FLAG_IS_DEFAULT(MaxNewSize) && FLAG_IS_DEFAULT(NewRatio)) {
1696
1697 // Set MaxNewSize to our calculated preferred_max_new_size unless
1698 // NewSize was set on the command line and it is larger than
1699 // preferred_max_new_size.
1700 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line
1701 FLAG_SET_ERGO(size_t, MaxNewSize, MAX2(NewSize, preferred_max_new_size));
1702 } else {
1703 FLAG_SET_ERGO(size_t, MaxNewSize, preferred_max_new_size);
1704 }
1705 log_trace(gc, heap)("CMS ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize);
1706
1707 // Code along this path potentially sets NewSize and OldSize
1708 log_trace(gc, heap)("CMS set min_heap_size: " SIZE_FORMAT " initial_heap_size: " SIZE_FORMAT " max_heap: " SIZE_FORMAT,
1709 min_heap_size(), InitialHeapSize, max_heap);
1710 size_t min_new = preferred_max_new_size;
1711 if (FLAG_IS_CMDLINE(NewSize)) {
1712 min_new = NewSize;
1713 }
1714 if (max_heap > min_new && min_heap_size() > min_new) {
1715 // Unless explicitly requested otherwise, make young gen
1716 // at least min_new, and at most preferred_max_new_size.
1717 if (FLAG_IS_DEFAULT(NewSize)) {
1718 FLAG_SET_ERGO(size_t, NewSize, MAX2(NewSize, min_new));
1719 FLAG_SET_ERGO(size_t, NewSize, MIN2(preferred_max_new_size, NewSize));
1720 log_trace(gc, heap)("CMS ergo set NewSize: " SIZE_FORMAT, NewSize);
1721 }
1722 // Unless explicitly requested otherwise, size old gen
1723 // so it's NewRatio x of NewSize.
1724 if (FLAG_IS_DEFAULT(OldSize)) {
1725 if (max_heap > NewSize) {
1726 FLAG_SET_ERGO(size_t, OldSize, MIN2(NewRatio*NewSize, max_heap - NewSize));
1727 log_trace(gc, heap)("CMS ergo set OldSize: " SIZE_FORMAT, OldSize);
1728 }
1729 }
1730 }
1731 }
1732 // Unless explicitly requested otherwise, definitely
1733 // promote all objects surviving "tenuring_default" scavenges.
1734 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) &&
1735 FLAG_IS_DEFAULT(SurvivorRatio)) {
1736 FLAG_SET_ERGO(uintx, MaxTenuringThreshold, tenuring_default);
1737 }
1738 // If we decided above (or user explicitly requested)
1739 // `promote all' (via MaxTenuringThreshold := 0),
1740 // prefer minuscule survivor spaces so as not to waste
1741 // space for (non-existent) survivors
1742 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) {
1743 FLAG_SET_ERGO(uintx, SurvivorRatio, MAX2((uintx)1024, SurvivorRatio));
1744 }
1745
1746 // OldPLABSize is interpreted in CMS as not the size of the PLAB in words,
1747 // but rather the number of free blocks of a given size that are used when
1748 // replenishing the local per-worker free list caches.
1749 if (FLAG_IS_DEFAULT(OldPLABSize)) {
1750 if (!FLAG_IS_DEFAULT(ResizeOldPLAB) && !ResizeOldPLAB) {
1751 // OldPLAB sizing manually turned off: Use a larger default setting,
1752 // unless it was manually specified. This is because a too-low value
1753 // will slow down scavenges.
1754 FLAG_SET_ERGO(size_t, OldPLABSize, CompactibleFreeListSpaceLAB::_default_static_old_plab_size); // default value before 6631166
1755 } else {
1756 FLAG_SET_DEFAULT(OldPLABSize, CompactibleFreeListSpaceLAB::_default_dynamic_old_plab_size); // old CMSParPromoteBlocksToClaim default
1757 }
1758 }
1759
1760 // If either of the static initialization defaults have changed, note this
1761 // modification.
1762 if (!FLAG_IS_DEFAULT(OldPLABSize) || !FLAG_IS_DEFAULT(OldPLABWeight)) {
1763 CompactibleFreeListSpaceLAB::modify_initialization(OldPLABSize, OldPLABWeight);
1764 }
1765
1766 if (!ClassUnloading) {
1767 FLAG_SET_CMDLINE(bool, CMSClassUnloadingEnabled, false);
1768 FLAG_SET_CMDLINE(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false);
1769 }
1770
1771 log_trace(gc)("MarkStackSize: %uk MarkStackSizeMax: %uk", (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K));
1772 log_trace(gc)("ConcGCThreads: %u", ConcGCThreads);
1773 }
1774 #endif // INCLUDE_ALL_GCS
1775
1776 void set_object_alignment() {
1777 // Object alignment.
1778 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2");
1779 MinObjAlignmentInBytes = ObjectAlignmentInBytes;
1780 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small");
1781 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize;
1782 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect");
1783 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1;
1784
1785 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes);
1786 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize;
1787
1788 // Oop encoding heap max
1789 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes;
1790
1791 if (SurvivorAlignmentInBytes == 0) {
1792 SurvivorAlignmentInBytes = ObjectAlignmentInBytes;
1793 }
1794
1795 #if INCLUDE_ALL_GCS
1796 // Set CMS global values
1797 CompactibleFreeListSpace::set_cms_values();
1798 #endif // INCLUDE_ALL_GCS
1799 }
1800
1801 size_t Arguments::max_heap_for_compressed_oops() {
1802 // Avoid sign flip.
1803 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size");
1804 // We need to fit both the NULL page and the heap into the memory budget, while
1805 // keeping alignment constraints of the heap. To guarantee the latter, as the
1806 // NULL page is located before the heap, we pad the NULL page to the conservative
1807 // maximum alignment that the GC may ever impose upon the heap.
1808 size_t displacement_due_to_null_page = align_size_up_(os::vm_page_size(),
1809 _conservative_max_heap_alignment);
1810
1811 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page);
1812 NOT_LP64(ShouldNotReachHere(); return 0);
1813 }
1814
1815 bool Arguments::should_auto_select_low_pause_collector() {
1816 if (UseAutoGCSelectPolicy &&
1817 !FLAG_IS_DEFAULT(MaxGCPauseMillis) &&
1818 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) {
1819 log_trace(gc)("Automatic selection of the low pause collector based on pause goal of %d (ms)", (int) MaxGCPauseMillis);
1820 return true;
1821 }
1822 return false;
1823 }
1824
1825 void Arguments::set_use_compressed_oops() {
1826 #ifndef ZERO
1827 #ifdef _LP64
1828 // MaxHeapSize is not set up properly at this point, but
1829 // the only value that can override MaxHeapSize if we are
1830 // to use UseCompressedOops is InitialHeapSize.
1831 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize);
1832
1833 if (max_heap_size <= max_heap_for_compressed_oops()) {
1834 #if !defined(COMPILER1) || defined(TIERED)
1835 if (FLAG_IS_DEFAULT(UseCompressedOops)) {
1836 FLAG_SET_ERGO(bool, UseCompressedOops, true);
1837 }
1838 #endif
1839 } else {
1840 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) {
1841 warning("Max heap size too large for Compressed Oops");
1842 FLAG_SET_DEFAULT(UseCompressedOops, false);
1843 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1844 }
1845 }
1846 #endif // _LP64
1847 #endif // ZERO
1848 }
1849
1850
1851 // NOTE: set_use_compressed_klass_ptrs() must be called after calling
1852 // set_use_compressed_oops().
1853 void Arguments::set_use_compressed_klass_ptrs() {
1854 #ifndef ZERO
1855 #ifdef _LP64
1856 // UseCompressedOops must be on for UseCompressedClassPointers to be on.
1857 if (!UseCompressedOops) {
1858 if (UseCompressedClassPointers) {
1859 warning("UseCompressedClassPointers requires UseCompressedOops");
1860 }
1861 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1862 } else {
1863 // Turn on UseCompressedClassPointers too
1864 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) {
1865 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true);
1866 }
1867 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs.
1868 if (UseCompressedClassPointers) {
1869 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) {
1870 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers");
1871 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1872 }
1873 }
1874 }
1875 #endif // _LP64
1876 #endif // !ZERO
1877 }
1878
1879 void Arguments::set_conservative_max_heap_alignment() {
1880 // The conservative maximum required alignment for the heap is the maximum of
1881 // the alignments imposed by several sources: any requirements from the heap
1882 // itself, the collector policy and the maximum page size we may run the VM
1883 // with.
1884 size_t heap_alignment = GenCollectedHeap::conservative_max_heap_alignment();
1885 #if INCLUDE_ALL_GCS
1886 if (UseParallelGC) {
1887 heap_alignment = ParallelScavengeHeap::conservative_max_heap_alignment();
1888 } else if (UseG1GC) {
1889 heap_alignment = G1CollectedHeap::conservative_max_heap_alignment();
1890 }
1891 #endif // INCLUDE_ALL_GCS
1892 _conservative_max_heap_alignment = MAX4(heap_alignment,
1893 (size_t)os::vm_allocation_granularity(),
1894 os::max_page_size(),
1895 CollectorPolicy::compute_heap_alignment());
1896 }
1897
1898 void Arguments::select_gc_ergonomically() {
1899 if (os::is_server_class_machine()) {
1900 if (should_auto_select_low_pause_collector()) {
1901 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true);
1902 } else {
1903 #if defined(JAVASE_EMBEDDED)
1904 FLAG_SET_ERGO(bool, UseParallelGC, true);
1905 #else
1906 FLAG_SET_ERGO(bool, UseG1GC, true);
1907 #endif
1908 }
1909 } else {
1910 FLAG_SET_ERGO(bool, UseSerialGC, true);
1911 }
1912 }
1913
1914 void Arguments::select_gc() {
1915 if (!gc_selected()) {
1916 select_gc_ergonomically();
1917 guarantee(gc_selected(), "No GC selected");
1918 }
1919 }
1920
1921 void Arguments::set_ergonomics_flags() {
1922 select_gc();
1923
1924 #if defined(COMPILER2) || INCLUDE_JVMCI
1925 // Shared spaces work fine with other GCs but causes bytecode rewriting
1926 // to be disabled, which hurts interpreter performance and decreases
1927 // server performance. When -server is specified, keep the default off
1928 // unless it is asked for. Future work: either add bytecode rewriting
1929 // at link time, or rewrite bytecodes in non-shared methods.
1930 if (!DumpSharedSpaces && !RequireSharedSpaces &&
1931 (FLAG_IS_DEFAULT(UseSharedSpaces) || !UseSharedSpaces)) {
1932 no_shared_spaces("COMPILER2 default: -Xshare:auto | off, have to manually setup to on.");
1933 }
1934 #endif
1935
1936 set_conservative_max_heap_alignment();
1937
1938 #ifndef ZERO
1939 #ifdef _LP64
1940 set_use_compressed_oops();
1941
1942 // set_use_compressed_klass_ptrs() must be called after calling
1943 // set_use_compressed_oops().
1944 set_use_compressed_klass_ptrs();
1945
1946 // Also checks that certain machines are slower with compressed oops
1947 // in vm_version initialization code.
1948 #endif // _LP64
1949 #endif // !ZERO
1950
1951 CodeCacheExtensions::set_ergonomics_flags();
1952 }
1953
1954 void Arguments::set_parallel_gc_flags() {
1955 assert(UseParallelGC || UseParallelOldGC, "Error");
1956 // Enable ParallelOld unless it was explicitly disabled (cmd line or rc file).
1957 if (FLAG_IS_DEFAULT(UseParallelOldGC)) {
1958 FLAG_SET_DEFAULT(UseParallelOldGC, true);
1959 }
1960 FLAG_SET_DEFAULT(UseParallelGC, true);
1961
1962 // If no heap maximum was requested explicitly, use some reasonable fraction
1963 // of the physical memory, up to a maximum of 1GB.
1964 FLAG_SET_DEFAULT(ParallelGCThreads,
1965 Abstract_VM_Version::parallel_worker_threads());
1966 if (ParallelGCThreads == 0) {
1967 jio_fprintf(defaultStream::error_stream(),
1968 "The Parallel GC can not be combined with -XX:ParallelGCThreads=0\n");
1969 vm_exit(1);
1970 }
1971
1972 if (UseAdaptiveSizePolicy) {
1973 // We don't want to limit adaptive heap sizing's freedom to adjust the heap
1974 // unless the user actually sets these flags.
1975 if (FLAG_IS_DEFAULT(MinHeapFreeRatio)) {
1976 FLAG_SET_DEFAULT(MinHeapFreeRatio, 0);
1977 }
1978 if (FLAG_IS_DEFAULT(MaxHeapFreeRatio)) {
1979 FLAG_SET_DEFAULT(MaxHeapFreeRatio, 100);
1980 }
1981 }
1982
1983 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the
1984 // SurvivorRatio has been set, reset their default values to SurvivorRatio +
1985 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger.
1986 // See CR 6362902 for details.
1987 if (!FLAG_IS_DEFAULT(SurvivorRatio)) {
1988 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) {
1989 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2);
1990 }
1991 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) {
1992 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2);
1993 }
1994 }
1995
1996 if (UseParallelOldGC) {
1997 // Par compact uses lower default values since they are treated as
1998 // minimums. These are different defaults because of the different
1999 // interpretation and are not ergonomically set.
2000 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) {
2001 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1);
2002 }
2003 }
2004 }
2005
2006 void Arguments::set_g1_gc_flags() {
2007 assert(UseG1GC, "Error");
2008 #if defined(COMPILER1) || INCLUDE_JVMCI
2009 FastTLABRefill = false;
2010 #endif
2011 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads());
2012 if (ParallelGCThreads == 0) {
2013 assert(!FLAG_IS_DEFAULT(ParallelGCThreads), "The default value for ParallelGCThreads should not be 0.");
2014 vm_exit_during_initialization("The flag -XX:+UseG1GC can not be combined with -XX:ParallelGCThreads=0", NULL);
2015 }
2016
2017 #if INCLUDE_ALL_GCS
2018 if (G1ConcRefinementThreads == 0) {
2019 FLAG_SET_DEFAULT(G1ConcRefinementThreads, ParallelGCThreads);
2020 }
2021 #endif
2022
2023 // MarkStackSize will be set (if it hasn't been set by the user)
2024 // when concurrent marking is initialized.
2025 // Its value will be based upon the number of parallel marking threads.
2026 // But we do set the maximum mark stack size here.
2027 if (FLAG_IS_DEFAULT(MarkStackSizeMax)) {
2028 FLAG_SET_DEFAULT(MarkStackSizeMax, 128 * TASKQUEUE_SIZE);
2029 }
2030
2031 if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) {
2032 // In G1, we want the default GC overhead goal to be higher than
2033 // it is for PS, or the heap might be expanded too aggressively.
2034 // We set it here to ~8%.
2035 FLAG_SET_DEFAULT(GCTimeRatio, 12);
2036 }
2037
2038 log_trace(gc)("MarkStackSize: %uk MarkStackSizeMax: %uk", (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K));
2039 log_trace(gc)("ConcGCThreads: %u", ConcGCThreads);
2040 }
2041
2042 #if !INCLUDE_ALL_GCS
2043 #ifdef ASSERT
2044 static bool verify_serial_gc_flags() {
2045 return (UseSerialGC &&
2046 !(UseParNewGC || (UseConcMarkSweepGC) || UseG1GC ||
2047 UseParallelGC || UseParallelOldGC));
2048 }
2049 #endif // ASSERT
2050 #endif // INCLUDE_ALL_GCS
2051
2052 void Arguments::set_gc_specific_flags() {
2053 #if INCLUDE_ALL_GCS
2054 // Set per-collector flags
2055 if (UseParallelGC || UseParallelOldGC) {
2056 set_parallel_gc_flags();
2057 } else if (UseConcMarkSweepGC) {
2058 set_cms_and_parnew_gc_flags();
2059 } else if (UseG1GC) {
2060 set_g1_gc_flags();
2061 }
2062 if (AssumeMP && !UseSerialGC) {
2063 if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) {
2064 warning("If the number of processors is expected to increase from one, then"
2065 " you should configure the number of parallel GC threads appropriately"
2066 " using -XX:ParallelGCThreads=N");
2067 }
2068 }
2069 if (MinHeapFreeRatio == 100) {
2070 // Keeping the heap 100% free is hard ;-) so limit it to 99%.
2071 FLAG_SET_ERGO(uintx, MinHeapFreeRatio, 99);
2072 }
2073 #else // INCLUDE_ALL_GCS
2074 assert(verify_serial_gc_flags(), "SerialGC unset");
2075 #endif // INCLUDE_ALL_GCS
2076 }
2077
2078 julong Arguments::limit_by_allocatable_memory(julong limit) {
2079 julong max_allocatable;
2080 julong result = limit;
2081 if (os::has_allocatable_memory_limit(&max_allocatable)) {
2082 result = MIN2(result, max_allocatable / MaxVirtMemFraction);
2083 }
2084 return result;
2085 }
2086
2087 // Use static initialization to get the default before parsing
2088 static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress;
2089
2090 void Arguments::set_heap_size() {
2091 const julong phys_mem =
2092 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM)
2093 : (julong)MaxRAM;
2094
2095 // If the maximum heap size has not been set with -Xmx,
2096 // then set it as fraction of the size of physical memory,
2097 // respecting the maximum and minimum sizes of the heap.
2098 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
2099 julong reasonable_max = phys_mem / MaxRAMFraction;
2100
2101 if (phys_mem <= MaxHeapSize * MinRAMFraction) {
2102 // Small physical memory, so use a minimum fraction of it for the heap
2103 reasonable_max = phys_mem / MinRAMFraction;
2104 } else {
2105 // Not-small physical memory, so require a heap at least
2106 // as large as MaxHeapSize
2107 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize);
2108 }
2109 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) {
2110 // Limit the heap size to ErgoHeapSizeLimit
2111 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit);
2112 }
2113 if (UseCompressedOops) {
2114 // Limit the heap size to the maximum possible when using compressed oops
2115 julong max_coop_heap = (julong)max_heap_for_compressed_oops();
2116
2117 // HeapBaseMinAddress can be greater than default but not less than.
2118 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) {
2119 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) {
2120 // matches compressed oops printing flags
2121 if (PrintCompressedOopsMode || (PrintMiscellaneous && Verbose)) {
2122 jio_fprintf(defaultStream::error_stream(),
2123 "HeapBaseMinAddress must be at least " SIZE_FORMAT
2124 " (" SIZE_FORMAT "G) which is greater than value given "
2125 SIZE_FORMAT "\n",
2126 DefaultHeapBaseMinAddress,
2127 DefaultHeapBaseMinAddress/G,
2128 HeapBaseMinAddress);
2129 }
2130 FLAG_SET_ERGO(size_t, HeapBaseMinAddress, DefaultHeapBaseMinAddress);
2131 }
2132 }
2133
2134 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) {
2135 // Heap should be above HeapBaseMinAddress to get zero based compressed oops
2136 // but it should be not less than default MaxHeapSize.
2137 max_coop_heap -= HeapBaseMinAddress;
2138 }
2139 reasonable_max = MIN2(reasonable_max, max_coop_heap);
2140 }
2141 reasonable_max = limit_by_allocatable_memory(reasonable_max);
2142
2143 if (!FLAG_IS_DEFAULT(InitialHeapSize)) {
2144 // An initial heap size was specified on the command line,
2145 // so be sure that the maximum size is consistent. Done
2146 // after call to limit_by_allocatable_memory because that
2147 // method might reduce the allocation size.
2148 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize);
2149 }
2150
2151 log_trace(gc, heap)(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max);
2152 FLAG_SET_ERGO(size_t, MaxHeapSize, (size_t)reasonable_max);
2153 }
2154
2155 // If the minimum or initial heap_size have not been set or requested to be set
2156 // ergonomically, set them accordingly.
2157 if (InitialHeapSize == 0 || min_heap_size() == 0) {
2158 julong reasonable_minimum = (julong)(OldSize + NewSize);
2159
2160 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize);
2161
2162 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum);
2163
2164 if (InitialHeapSize == 0) {
2165 julong reasonable_initial = phys_mem / InitialRAMFraction;
2166
2167 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size());
2168 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize);
2169
2170 reasonable_initial = limit_by_allocatable_memory(reasonable_initial);
2171
2172 log_trace(gc, heap)(" Initial heap size " SIZE_FORMAT, (size_t)reasonable_initial);
2173 FLAG_SET_ERGO(size_t, InitialHeapSize, (size_t)reasonable_initial);
2174 }
2175 // If the minimum heap size has not been set (via -Xms),
2176 // synchronize with InitialHeapSize to avoid errors with the default value.
2177 if (min_heap_size() == 0) {
2178 set_min_heap_size(MIN2((size_t)reasonable_minimum, InitialHeapSize));
2179 log_trace(gc, heap)(" Minimum heap size " SIZE_FORMAT, min_heap_size());
2180 }
2181 }
2182 }
2183
2184 // This option inspects the machine and attempts to set various
2185 // parameters to be optimal for long-running, memory allocation
2186 // intensive jobs. It is intended for machines with large
2187 // amounts of cpu and memory.
2188 jint Arguments::set_aggressive_heap_flags() {
2189 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit
2190 // VM, but we may not be able to represent the total physical memory
2191 // available (like having 8gb of memory on a box but using a 32bit VM).
2192 // Thus, we need to make sure we're using a julong for intermediate
2193 // calculations.
2194 julong initHeapSize;
2195 julong total_memory = os::physical_memory();
2196
2197 if (total_memory < (julong) 256 * M) {
2198 jio_fprintf(defaultStream::error_stream(),
2199 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n");
2200 vm_exit(1);
2201 }
2202
2203 // The heap size is half of available memory, or (at most)
2204 // all of possible memory less 160mb (leaving room for the OS
2205 // when using ISM). This is the maximum; because adaptive sizing
2206 // is turned on below, the actual space used may be smaller.
2207
2208 initHeapSize = MIN2(total_memory / (julong) 2,
2209 total_memory - (julong) 160 * M);
2210
2211 initHeapSize = limit_by_allocatable_memory(initHeapSize);
2212
2213 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
2214 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, initHeapSize) != Flag::SUCCESS) {
2215 return JNI_EINVAL;
2216 }
2217 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, initHeapSize) != Flag::SUCCESS) {
2218 return JNI_EINVAL;
2219 }
2220 // Currently the minimum size and the initial heap sizes are the same.
2221 set_min_heap_size(initHeapSize);
2222 }
2223 if (FLAG_IS_DEFAULT(NewSize)) {
2224 // Make the young generation 3/8ths of the total heap.
2225 if (FLAG_SET_CMDLINE(size_t, NewSize,
2226 ((julong) MaxHeapSize / (julong) 8) * (julong) 3) != Flag::SUCCESS) {
2227 return JNI_EINVAL;
2228 }
2229 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, NewSize) != Flag::SUCCESS) {
2230 return JNI_EINVAL;
2231 }
2232 }
2233
2234 #if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
2235 FLAG_SET_DEFAULT(UseLargePages, true);
2236 #endif
2237
2238 // Increase some data structure sizes for efficiency
2239 if (FLAG_SET_CMDLINE(size_t, BaseFootPrintEstimate, MaxHeapSize) != Flag::SUCCESS) {
2240 return JNI_EINVAL;
2241 }
2242 if (FLAG_SET_CMDLINE(bool, ResizeTLAB, false) != Flag::SUCCESS) {
2243 return JNI_EINVAL;
2244 }
2245 if (FLAG_SET_CMDLINE(size_t, TLABSize, 256 * K) != Flag::SUCCESS) {
2246 return JNI_EINVAL;
2247 }
2248
2249 // See the OldPLABSize comment below, but replace 'after promotion'
2250 // with 'after copying'. YoungPLABSize is the size of the survivor
2251 // space per-gc-thread buffers. The default is 4kw.
2252 if (FLAG_SET_CMDLINE(size_t, YoungPLABSize, 256 * K) != Flag::SUCCESS) { // Note: this is in words
2253 return JNI_EINVAL;
2254 }
2255
2256 // OldPLABSize is the size of the buffers in the old gen that
2257 // UseParallelGC uses to promote live data that doesn't fit in the
2258 // survivor spaces. At any given time, there's one for each gc thread.
2259 // The default size is 1kw. These buffers are rarely used, since the
2260 // survivor spaces are usually big enough. For specjbb, however, there
2261 // are occasions when there's lots of live data in the young gen
2262 // and we end up promoting some of it. We don't have a definite
2263 // explanation for why bumping OldPLABSize helps, but the theory
2264 // is that a bigger PLAB results in retaining something like the
2265 // original allocation order after promotion, which improves mutator
2266 // locality. A minor effect may be that larger PLABs reduce the
2267 // number of PLAB allocation events during gc. The value of 8kw
2268 // was arrived at by experimenting with specjbb.
2269 if (FLAG_SET_CMDLINE(size_t, OldPLABSize, 8 * K) != Flag::SUCCESS) { // Note: this is in words
2270 return JNI_EINVAL;
2271 }
2272
2273 // Enable parallel GC and adaptive generation sizing
2274 if (FLAG_SET_CMDLINE(bool, UseParallelGC, true) != Flag::SUCCESS) {
2275 return JNI_EINVAL;
2276 }
2277 FLAG_SET_DEFAULT(ParallelGCThreads,
2278 Abstract_VM_Version::parallel_worker_threads());
2279
2280 // Encourage steady state memory management
2281 if (FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100) != Flag::SUCCESS) {
2282 return JNI_EINVAL;
2283 }
2284
2285 // This appears to improve mutator locality
2286 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
2287 return JNI_EINVAL;
2288 }
2289
2290 // Get around early Solaris scheduling bug
2291 // (affinity vs other jobs on system)
2292 // but disallow DR and offlining (5008695).
2293 if (FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true) != Flag::SUCCESS) {
2294 return JNI_EINVAL;
2295 }
2296
2297 return JNI_OK;
2298 }
2299
2300 // This must be called after ergonomics.
2301 void Arguments::set_bytecode_flags() {
2302 if (!RewriteBytecodes) {
2303 FLAG_SET_DEFAULT(RewriteFrequentPairs, false);
2304 }
2305 }
2306
2307 // Aggressive optimization flags -XX:+AggressiveOpts
2308 jint Arguments::set_aggressive_opts_flags() {
2309 #ifdef COMPILER2
2310 if (AggressiveUnboxing) {
2311 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
2312 FLAG_SET_DEFAULT(EliminateAutoBox, true);
2313 } else if (!EliminateAutoBox) {
2314 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled");
2315 AggressiveUnboxing = false;
2316 }
2317 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) {
2318 FLAG_SET_DEFAULT(DoEscapeAnalysis, true);
2319 } else if (!DoEscapeAnalysis) {
2320 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled");
2321 AggressiveUnboxing = false;
2322 }
2323 }
2324 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
2325 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
2326 FLAG_SET_DEFAULT(EliminateAutoBox, true);
2327 }
2328 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
2329 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000);
2330 }
2331
2332 // Feed the cache size setting into the JDK
2333 char buffer[1024];
2334 sprintf(buffer, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax);
2335 if (!add_property(buffer)) {
2336 return JNI_ENOMEM;
2337 }
2338 }
2339 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) {
2340 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500);
2341 }
2342 #endif
2343
2344 if (AggressiveOpts) {
2345 // Sample flag setting code
2346 // if (FLAG_IS_DEFAULT(EliminateZeroing)) {
2347 // FLAG_SET_DEFAULT(EliminateZeroing, true);
2348 // }
2349 }
2350
2351 return JNI_OK;
2352 }
2353
2354 //===========================================================================================================
2355 // Parsing of java.compiler property
2356
2357 void Arguments::process_java_compiler_argument(const char* arg) {
2358 // For backwards compatibility, Djava.compiler=NONE or ""
2359 // causes us to switch to -Xint mode UNLESS -Xdebug
2360 // is also specified.
2361 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) {
2362 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen.
2363 }
2364 }
2365
2366 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) {
2367 _sun_java_launcher = os::strdup_check_oom(launcher);
2368 }
2369
2370 bool Arguments::created_by_java_launcher() {
2371 assert(_sun_java_launcher != NULL, "property must have value");
2372 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0;
2373 }
2374
2375 bool Arguments::sun_java_launcher_is_altjvm() {
2376 return _sun_java_launcher_is_altjvm;
2377 }
2378
2379 //===========================================================================================================
2380 // Parsing of main arguments
2381
2382 #if INCLUDE_JVMCI
2383 // Check consistency of jvmci vm argument settings.
2384 bool Arguments::check_jvmci_args_consistency() {
2385 if (!EnableJVMCI && !JVMCIGlobals::check_jvmci_flags_are_consistent()) {
2386 JVMCIGlobals::print_jvmci_args_inconsistency_error_message();
2387 return false;
2388 }
2389 return true;
2390 }
2391 #endif //INCLUDE_JVMCI
2392
2393 // Check consistency of GC selection
2394 bool Arguments::check_gc_consistency() {
2395 // Ensure that the user has not selected conflicting sets
2396 // of collectors.
2397 uint i = 0;
2398 if (UseSerialGC) i++;
2399 if (UseConcMarkSweepGC) i++;
2400 if (UseParallelGC || UseParallelOldGC) i++;
2401 if (UseG1GC) i++;
2402 if (i > 1) {
2403 jio_fprintf(defaultStream::error_stream(),
2404 "Conflicting collector combinations in option list; "
2405 "please refer to the release notes for the combinations "
2406 "allowed\n");
2407 return false;
2408 }
2409
2410 if (UseConcMarkSweepGC && !UseParNewGC) {
2411 jio_fprintf(defaultStream::error_stream(),
2412 "It is not possible to combine the DefNew young collector with the CMS collector.\n");
2413 return false;
2414 }
2415
2416 if (UseParNewGC && !UseConcMarkSweepGC) {
2417 jio_fprintf(defaultStream::error_stream(),
2418 "It is not possible to combine the ParNew young collector with any collector other than CMS.\n");
2419 return false;
2420 }
2421
2422 return true;
2423 }
2424
2425 // Check the consistency of vm_init_args
2426 bool Arguments::check_vm_args_consistency() {
2427 // Method for adding checks for flag consistency.
2428 // The intent is to warn the user of all possible conflicts,
2429 // before returning an error.
2430 // Note: Needs platform-dependent factoring.
2431 bool status = true;
2432
2433 if (TLABRefillWasteFraction == 0) {
2434 jio_fprintf(defaultStream::error_stream(),
2435 "TLABRefillWasteFraction should be a denominator, "
2436 "not " SIZE_FORMAT "\n",
2437 TLABRefillWasteFraction);
2438 status = false;
2439 }
2440
2441 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) {
2442 MarkSweepAlwaysCompactCount = 1; // Move objects every gc.
2443 }
2444
2445 if (!(UseParallelGC || UseParallelOldGC) && FLAG_IS_DEFAULT(ScavengeBeforeFullGC)) {
2446 FLAG_SET_DEFAULT(ScavengeBeforeFullGC, false);
2447 }
2448
2449 if (GCTimeLimit == 100) {
2450 // Turn off gc-overhead-limit-exceeded checks
2451 FLAG_SET_DEFAULT(UseGCOverheadLimit, false);
2452 }
2453
2454 status = status && check_gc_consistency();
2455
2456 // CMS space iteration, which FLSVerifyAllHeapreferences entails,
2457 // insists that we hold the requisite locks so that the iteration is
2458 // MT-safe. For the verification at start-up and shut-down, we don't
2459 // yet have a good way of acquiring and releasing these locks,
2460 // which are not visible at the CollectedHeap level. We want to
2461 // be able to acquire these locks and then do the iteration rather
2462 // than just disable the lock verification. This will be fixed under
2463 // bug 4788986.
2464 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) {
2465 if (VerifyDuringStartup) {
2466 warning("Heap verification at start-up disabled "
2467 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
2468 VerifyDuringStartup = false; // Disable verification at start-up
2469 }
2470
2471 if (VerifyBeforeExit) {
2472 warning("Heap verification at shutdown disabled "
2473 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
2474 VerifyBeforeExit = false; // Disable verification at shutdown
2475 }
2476 }
2477
2478 if (PrintNMTStatistics) {
2479 #if INCLUDE_NMT
2480 if (MemTracker::tracking_level() == NMT_off) {
2481 #endif // INCLUDE_NMT
2482 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled");
2483 PrintNMTStatistics = false;
2484 #if INCLUDE_NMT
2485 }
2486 #endif
2487 }
2488 #if INCLUDE_JVMCI
2489
2490 status = status && check_jvmci_args_consistency();
2491
2492 if (EnableJVMCI) {
2493 if (!ScavengeRootsInCode) {
2494 warning("forcing ScavengeRootsInCode non-zero because JVMCI is enabled");
2495 ScavengeRootsInCode = 1;
2496 }
2497 if (FLAG_IS_DEFAULT(TypeProfileLevel)) {
2498 TypeProfileLevel = 0;
2499 }
2500 if (UseJVMCICompiler) {
2501 if (FLAG_IS_DEFAULT(TypeProfileWidth)) {
2502 TypeProfileWidth = 8;
2503 }
2504 }
2505 }
2506 #endif
2507
2508 // Check lower bounds of the code cache
2509 // Template Interpreter code is approximately 3X larger in debug builds.
2510 uint min_code_cache_size = CodeCacheMinimumUseSpace DEBUG_ONLY(* 3);
2511 if (InitialCodeCacheSize < (uintx)os::vm_page_size()) {
2512 jio_fprintf(defaultStream::error_stream(),
2513 "Invalid InitialCodeCacheSize=%dK. Must be at least %dK.\n", InitialCodeCacheSize/K,
2514 os::vm_page_size()/K);
2515 status = false;
2516 } else if (ReservedCodeCacheSize < InitialCodeCacheSize) {
2517 jio_fprintf(defaultStream::error_stream(),
2518 "Invalid ReservedCodeCacheSize: %dK. Must be at least InitialCodeCacheSize=%dK.\n",
2519 ReservedCodeCacheSize/K, InitialCodeCacheSize/K);
2520 status = false;
2521 } else if (ReservedCodeCacheSize < min_code_cache_size) {
2522 jio_fprintf(defaultStream::error_stream(),
2523 "Invalid ReservedCodeCacheSize=%dK. Must be at least %uK.\n", ReservedCodeCacheSize/K,
2524 min_code_cache_size/K);
2525 status = false;
2526 } else if (ReservedCodeCacheSize > CODE_CACHE_SIZE_LIMIT) {
2527 // Code cache size larger than CODE_CACHE_SIZE_LIMIT is not supported.
2528 jio_fprintf(defaultStream::error_stream(),
2529 "Invalid ReservedCodeCacheSize=%dM. Must be at most %uM.\n", ReservedCodeCacheSize/M,
2530 CODE_CACHE_SIZE_LIMIT/M);
2531 status = false;
2532 } else if (NonNMethodCodeHeapSize < min_code_cache_size) {
2533 jio_fprintf(defaultStream::error_stream(),
2534 "Invalid NonNMethodCodeHeapSize=%dK. Must be at least %uK.\n", NonNMethodCodeHeapSize/K,
2535 min_code_cache_size/K);
2536 status = false;
2537 }
2538
2539 #ifdef _LP64
2540 if (!FLAG_IS_DEFAULT(CICompilerCount) && !FLAG_IS_DEFAULT(CICompilerCountPerCPU) && CICompilerCountPerCPU) {
2541 warning("The VM option CICompilerCountPerCPU overrides CICompilerCount.");
2542 }
2543 #endif
2544
2545 #ifndef SUPPORT_RESERVED_STACK_AREA
2546 if (StackReservedPages != 0) {
2547 FLAG_SET_CMDLINE(intx, StackReservedPages, 0);
2548 warning("Reserved Stack Area not supported on this platform");
2549 }
2550 #endif
2551 return status;
2552 }
2553
2554 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore,
2555 const char* option_type) {
2556 if (ignore) return false;
2557
2558 const char* spacer = " ";
2559 if (option_type == NULL) {
2560 option_type = ++spacer; // Set both to the empty string.
2561 }
2562
2563 if (os::obsolete_option(option)) {
2564 jio_fprintf(defaultStream::error_stream(),
2565 "Obsolete %s%soption: %s\n", option_type, spacer,
2566 option->optionString);
2567 return false;
2568 } else {
2569 jio_fprintf(defaultStream::error_stream(),
2570 "Unrecognized %s%soption: %s\n", option_type, spacer,
2571 option->optionString);
2572 return true;
2573 }
2574 }
2575
2576 static const char* user_assertion_options[] = {
2577 "-da", "-ea", "-disableassertions", "-enableassertions", 0
2578 };
2579
2580 static const char* system_assertion_options[] = {
2581 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0
2582 };
2583
2584 bool Arguments::parse_uintx(const char* value,
2585 uintx* uintx_arg,
2586 uintx min_size) {
2587
2588 // Check the sign first since atomull() parses only unsigned values.
2589 bool value_is_positive = !(*value == '-');
2590
2591 if (value_is_positive) {
2592 julong n;
2593 bool good_return = atomull(value, &n);
2594 if (good_return) {
2595 bool above_minimum = n >= min_size;
2596 bool value_is_too_large = n > max_uintx;
2597
2598 if (above_minimum && !value_is_too_large) {
2599 *uintx_arg = n;
2600 return true;
2601 }
2602 }
2603 }
2604 return false;
2605 }
2606
2607 Arguments::ArgsRange Arguments::parse_memory_size(const char* s,
2608 julong* long_arg,
2609 julong min_size) {
2610 if (!atomull(s, long_arg)) return arg_unreadable;
2611 return check_memory_size(*long_arg, min_size);
2612 }
2613
2614 // Parse JavaVMInitArgs structure
2615
2616 jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args,
2617 const JavaVMInitArgs *java_options_args,
2618 const JavaVMInitArgs *cmd_line_args) {
2619 // For components of the system classpath.
2620 SysClassPath scp(Arguments::get_sysclasspath());
2621 bool scp_assembly_required = false;
2622
2623 // Save default settings for some mode flags
2624 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
2625 Arguments::_UseOnStackReplacement = UseOnStackReplacement;
2626 Arguments::_ClipInlining = ClipInlining;
2627 Arguments::_BackgroundCompilation = BackgroundCompilation;
2628 if (TieredCompilation) {
2629 Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
2630 Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
2631 }
2632
2633 // Setup flags for mixed which is the default
2634 set_mode_flags(_mixed);
2635
2636 // Parse args structure generated from JAVA_TOOL_OPTIONS environment
2637 // variable (if present).
2638 jint result = parse_each_vm_init_arg(
2639 java_tool_options_args, &scp, &scp_assembly_required, Flag::ENVIRON_VAR);
2640 if (result != JNI_OK) {
2641 return result;
2642 }
2643
2644 // Parse args structure generated from the command line flags.
2645 result = parse_each_vm_init_arg(cmd_line_args, &scp, &scp_assembly_required,
2646 Flag::COMMAND_LINE);
2647 if (result != JNI_OK) {
2648 return result;
2649 }
2650
2651 // Parse args structure generated from the _JAVA_OPTIONS environment
2652 // variable (if present) (mimics classic VM)
2653 result = parse_each_vm_init_arg(
2654 java_options_args, &scp, &scp_assembly_required, Flag::ENVIRON_VAR);
2655 if (result != JNI_OK) {
2656 return result;
2657 }
2658
2659 // Do final processing now that all arguments have been parsed
2660 result = finalize_vm_init_args(&scp, scp_assembly_required);
2661 if (result != JNI_OK) {
2662 return result;
2663 }
2664
2665 return JNI_OK;
2666 }
2667
2668 // Checks if name in command-line argument -agent{lib,path}:name[=options]
2669 // represents a valid JDWP agent. is_path==true denotes that we
2670 // are dealing with -agentpath (case where name is a path), otherwise with
2671 // -agentlib
2672 bool valid_jdwp_agent(char *name, bool is_path) {
2673 char *_name;
2674 const char *_jdwp = "jdwp";
2675 size_t _len_jdwp, _len_prefix;
2676
2677 if (is_path) {
2678 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) {
2679 return false;
2680 }
2681
2682 _name++; // skip past last path separator
2683 _len_prefix = strlen(JNI_LIB_PREFIX);
2684
2685 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) {
2686 return false;
2687 }
2688
2689 _name += _len_prefix;
2690 _len_jdwp = strlen(_jdwp);
2691
2692 if (strncmp(_name, _jdwp, _len_jdwp) == 0) {
2693 _name += _len_jdwp;
2694 }
2695 else {
2696 return false;
2697 }
2698
2699 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) {
2700 return false;
2701 }
2702
2703 return true;
2704 }
2705
2706 if (strcmp(name, _jdwp) == 0) {
2707 return true;
2708 }
2709
2710 return false;
2711 }
2712
2713 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args,
2714 SysClassPath* scp_p,
2715 bool* scp_assembly_required_p,
2716 Flag::Flags origin) {
2717 // For match_option to return remaining or value part of option string
2718 const char* tail;
2719
2720 // iterate over arguments
2721 for (int index = 0; index < args->nOptions; index++) {
2722 bool is_absolute_path = false; // for -agentpath vs -agentlib
2723
2724 const JavaVMOption* option = args->options + index;
2725
2726 if (!match_option(option, "-Djava.class.path", &tail) &&
2727 !match_option(option, "-Dsun.java.command", &tail) &&
2728 !match_option(option, "-Dsun.java.launcher", &tail)) {
2729
2730 // add all jvm options to the jvm_args string. This string
2731 // is used later to set the java.vm.args PerfData string constant.
2732 // the -Djava.class.path and the -Dsun.java.command options are
2733 // omitted from jvm_args string as each have their own PerfData
2734 // string constant object.
2735 build_jvm_args(option->optionString);
2736 }
2737
2738 // -verbose:[class/gc/jni]
2739 if (match_option(option, "-verbose", &tail)) {
2740 if (!strcmp(tail, ":class") || !strcmp(tail, "")) {
2741 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(classload));
2742 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(classunload));
2743 } else if (!strcmp(tail, ":gc")) {
2744 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(gc));
2745 } else if (!strcmp(tail, ":jni")) {
2746 if (FLAG_SET_CMDLINE(bool, PrintJNIResolving, true) != Flag::SUCCESS) {
2747 return JNI_EINVAL;
2748 }
2749 }
2750 // -da / -ea / -disableassertions / -enableassertions
2751 // These accept an optional class/package name separated by a colon, e.g.,
2752 // -da:java.lang.Thread.
2753 } else if (match_option(option, user_assertion_options, &tail, true)) {
2754 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2755 if (*tail == '\0') {
2756 JavaAssertions::setUserClassDefault(enable);
2757 } else {
2758 assert(*tail == ':', "bogus match by match_option()");
2759 JavaAssertions::addOption(tail + 1, enable);
2760 }
2761 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions
2762 } else if (match_option(option, system_assertion_options, &tail, false)) {
2763 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2764 JavaAssertions::setSystemClassDefault(enable);
2765 // -bootclasspath:
2766 } else if (match_option(option, "-Xbootclasspath:", &tail)) {
2767 scp_p->reset_path(tail);
2768 *scp_assembly_required_p = true;
2769 // -bootclasspath/a:
2770 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) {
2771 scp_p->add_suffix(tail);
2772 *scp_assembly_required_p = true;
2773 // -bootclasspath/p:
2774 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) {
2775 scp_p->add_prefix(tail);
2776 *scp_assembly_required_p = true;
2777 // -Xrun
2778 } else if (match_option(option, "-Xrun", &tail)) {
2779 if (tail != NULL) {
2780 const char* pos = strchr(tail, ':');
2781 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2782 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len);
2783 name[len] = '\0';
2784
2785 char *options = NULL;
2786 if(pos != NULL) {
2787 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied.
2788 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtInternal), pos+1, len2);
2789 }
2790 #if !INCLUDE_JVMTI
2791 if (strcmp(name, "jdwp") == 0) {
2792 jio_fprintf(defaultStream::error_stream(),
2793 "Debugging agents are not supported in this VM\n");
2794 return JNI_ERR;
2795 }
2796 #endif // !INCLUDE_JVMTI
2797 add_init_library(name, options);
2798 }
2799 // -agentlib and -agentpath
2800 } else if (match_option(option, "-agentlib:", &tail) ||
2801 (is_absolute_path = match_option(option, "-agentpath:", &tail))) {
2802 if(tail != NULL) {
2803 const char* pos = strchr(tail, '=');
2804 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2805 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len);
2806 name[len] = '\0';
2807
2808 char *options = NULL;
2809 if(pos != NULL) {
2810 options = os::strdup_check_oom(pos + 1, mtInternal);
2811 }
2812 #if !INCLUDE_JVMTI
2813 if (valid_jdwp_agent(name, is_absolute_path)) {
2814 jio_fprintf(defaultStream::error_stream(),
2815 "Debugging agents are not supported in this VM\n");
2816 return JNI_ERR;
2817 }
2818 #endif // !INCLUDE_JVMTI
2819 add_init_agent(name, options, is_absolute_path);
2820 }
2821 // -javaagent
2822 } else if (match_option(option, "-javaagent:", &tail)) {
2823 #if !INCLUDE_JVMTI
2824 jio_fprintf(defaultStream::error_stream(),
2825 "Instrumentation agents are not supported in this VM\n");
2826 return JNI_ERR;
2827 #else
2828 if(tail != NULL) {
2829 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1, mtInternal), tail);
2830 add_init_agent("instrument", options, false);
2831 }
2832 #endif // !INCLUDE_JVMTI
2833 // -Xnoclassgc
2834 } else if (match_option(option, "-Xnoclassgc")) {
2835 if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != Flag::SUCCESS) {
2836 return JNI_EINVAL;
2837 }
2838 // -Xconcgc
2839 } else if (match_option(option, "-Xconcgc")) {
2840 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true) != Flag::SUCCESS) {
2841 return JNI_EINVAL;
2842 }
2843 // -Xnoconcgc
2844 } else if (match_option(option, "-Xnoconcgc")) {
2845 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false) != Flag::SUCCESS) {
2846 return JNI_EINVAL;
2847 }
2848 // -Xbatch
2849 } else if (match_option(option, "-Xbatch")) {
2850 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
2851 return JNI_EINVAL;
2852 }
2853 // -Xmn for compatibility with other JVM vendors
2854 } else if (match_option(option, "-Xmn", &tail)) {
2855 julong long_initial_young_size = 0;
2856 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1);
2857 if (errcode != arg_in_range) {
2858 jio_fprintf(defaultStream::error_stream(),
2859 "Invalid initial young generation size: %s\n", option->optionString);
2860 describe_range_error(errcode);
2861 return JNI_EINVAL;
2862 }
2863 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
2864 return JNI_EINVAL;
2865 }
2866 if (FLAG_SET_CMDLINE(size_t, NewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
2867 return JNI_EINVAL;
2868 }
2869 // -Xms
2870 } else if (match_option(option, "-Xms", &tail)) {
2871 julong long_initial_heap_size = 0;
2872 // an initial heap size of 0 means automatically determine
2873 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0);
2874 if (errcode != arg_in_range) {
2875 jio_fprintf(defaultStream::error_stream(),
2876 "Invalid initial heap size: %s\n", option->optionString);
2877 describe_range_error(errcode);
2878 return JNI_EINVAL;
2879 }
2880 set_min_heap_size((size_t)long_initial_heap_size);
2881 // Currently the minimum size and the initial heap sizes are the same.
2882 // Can be overridden with -XX:InitialHeapSize.
2883 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, (size_t)long_initial_heap_size) != Flag::SUCCESS) {
2884 return JNI_EINVAL;
2885 }
2886 // -Xmx
2887 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) {
2888 julong long_max_heap_size = 0;
2889 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1);
2890 if (errcode != arg_in_range) {
2891 jio_fprintf(defaultStream::error_stream(),
2892 "Invalid maximum heap size: %s\n", option->optionString);
2893 describe_range_error(errcode);
2894 return JNI_EINVAL;
2895 }
2896 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, (size_t)long_max_heap_size) != Flag::SUCCESS) {
2897 return JNI_EINVAL;
2898 }
2899 // Xmaxf
2900 } else if (match_option(option, "-Xmaxf", &tail)) {
2901 char* err;
2902 int maxf = (int)(strtod(tail, &err) * 100);
2903 if (*err != '\0' || *tail == '\0') {
2904 jio_fprintf(defaultStream::error_stream(),
2905 "Bad max heap free percentage size: %s\n",
2906 option->optionString);
2907 return JNI_EINVAL;
2908 } else {
2909 if (FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf) != Flag::SUCCESS) {
2910 return JNI_EINVAL;
2911 }
2912 }
2913 // Xminf
2914 } else if (match_option(option, "-Xminf", &tail)) {
2915 char* err;
2916 int minf = (int)(strtod(tail, &err) * 100);
2917 if (*err != '\0' || *tail == '\0') {
2918 jio_fprintf(defaultStream::error_stream(),
2919 "Bad min heap free percentage size: %s\n",
2920 option->optionString);
2921 return JNI_EINVAL;
2922 } else {
2923 if (FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf) != Flag::SUCCESS) {
2924 return JNI_EINVAL;
2925 }
2926 }
2927 // -Xss
2928 } else if (match_option(option, "-Xss", &tail)) {
2929 julong long_ThreadStackSize = 0;
2930 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000);
2931 if (errcode != arg_in_range) {
2932 jio_fprintf(defaultStream::error_stream(),
2933 "Invalid thread stack size: %s\n", option->optionString);
2934 describe_range_error(errcode);
2935 return JNI_EINVAL;
2936 }
2937 // Internally track ThreadStackSize in units of 1024 bytes.
2938 if (FLAG_SET_CMDLINE(intx, ThreadStackSize,
2939 round_to((int)long_ThreadStackSize, K) / K) != Flag::SUCCESS) {
2940 return JNI_EINVAL;
2941 }
2942 // -Xoss, -Xsqnopause, -Xoptimize, -Xboundthreads, -Xusealtsigs
2943 } else if (match_option(option, "-Xoss", &tail) ||
2944 match_option(option, "-Xsqnopause") ||
2945 match_option(option, "-Xoptimize") ||
2946 match_option(option, "-Xboundthreads") ||
2947 match_option(option, "-Xusealtsigs")) {
2948 // All these options are deprecated in JDK 9 and will be removed in a future release
2949 char version[256];
2950 JDK_Version::jdk(9).to_string(version, sizeof(version));
2951 warning("Ignoring option %s; support was removed in %s", option->optionString, version);
2952 } else if (match_option(option, "-XX:CodeCacheExpansionSize=", &tail)) {
2953 julong long_CodeCacheExpansionSize = 0;
2954 ArgsRange errcode = parse_memory_size(tail, &long_CodeCacheExpansionSize, os::vm_page_size());
2955 if (errcode != arg_in_range) {
2956 jio_fprintf(defaultStream::error_stream(),
2957 "Invalid argument: %s. Must be at least %luK.\n", option->optionString,
2958 os::vm_page_size()/K);
2959 return JNI_EINVAL;
2960 }
2961 if (FLAG_SET_CMDLINE(uintx, CodeCacheExpansionSize, (uintx)long_CodeCacheExpansionSize) != Flag::SUCCESS) {
2962 return JNI_EINVAL;
2963 }
2964 } else if (match_option(option, "-Xmaxjitcodesize", &tail) ||
2965 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) {
2966 julong long_ReservedCodeCacheSize = 0;
2967
2968 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1);
2969 if (errcode != arg_in_range) {
2970 jio_fprintf(defaultStream::error_stream(),
2971 "Invalid maximum code cache size: %s.\n", option->optionString);
2972 return JNI_EINVAL;
2973 }
2974 if (FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != Flag::SUCCESS) {
2975 return JNI_EINVAL;
2976 }
2977 // -XX:NonNMethodCodeHeapSize=
2978 } else if (match_option(option, "-XX:NonNMethodCodeHeapSize=", &tail)) {
2979 julong long_NonNMethodCodeHeapSize = 0;
2980
2981 ArgsRange errcode = parse_memory_size(tail, &long_NonNMethodCodeHeapSize, 1);
2982 if (errcode != arg_in_range) {
2983 jio_fprintf(defaultStream::error_stream(),
2984 "Invalid maximum non-nmethod code heap size: %s.\n", option->optionString);
2985 return JNI_EINVAL;
2986 }
2987 if (FLAG_SET_CMDLINE(uintx, NonNMethodCodeHeapSize, (uintx)long_NonNMethodCodeHeapSize) != Flag::SUCCESS) {
2988 return JNI_EINVAL;
2989 }
2990 // -XX:ProfiledCodeHeapSize=
2991 } else if (match_option(option, "-XX:ProfiledCodeHeapSize=", &tail)) {
2992 julong long_ProfiledCodeHeapSize = 0;
2993
2994 ArgsRange errcode = parse_memory_size(tail, &long_ProfiledCodeHeapSize, 1);
2995 if (errcode != arg_in_range) {
2996 jio_fprintf(defaultStream::error_stream(),
2997 "Invalid maximum profiled code heap size: %s.\n", option->optionString);
2998 return JNI_EINVAL;
2999 }
3000 if (FLAG_SET_CMDLINE(uintx, ProfiledCodeHeapSize, (uintx)long_ProfiledCodeHeapSize) != Flag::SUCCESS) {
3001 return JNI_EINVAL;
3002 }
3003 // -XX:NonProfiledCodeHeapSizee=
3004 } else if (match_option(option, "-XX:NonProfiledCodeHeapSize=", &tail)) {
3005 julong long_NonProfiledCodeHeapSize = 0;
3006
3007 ArgsRange errcode = parse_memory_size(tail, &long_NonProfiledCodeHeapSize, 1);
3008 if (errcode != arg_in_range) {
3009 jio_fprintf(defaultStream::error_stream(),
3010 "Invalid maximum non-profiled code heap size: %s.\n", option->optionString);
3011 return JNI_EINVAL;
3012 }
3013 if (FLAG_SET_CMDLINE(uintx, NonProfiledCodeHeapSize, (uintx)long_NonProfiledCodeHeapSize) != Flag::SUCCESS) {
3014 return JNI_EINVAL;
3015 }
3016 // -green
3017 } else if (match_option(option, "-green")) {
3018 jio_fprintf(defaultStream::error_stream(),
3019 "Green threads support not available\n");
3020 return JNI_EINVAL;
3021 // -native
3022 } else if (match_option(option, "-native")) {
3023 // HotSpot always uses native threads, ignore silently for compatibility
3024 // -Xrs
3025 } else if (match_option(option, "-Xrs")) {
3026 // Classic/EVM option, new functionality
3027 if (FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true) != Flag::SUCCESS) {
3028 return JNI_EINVAL;
3029 }
3030 // -Xprof
3031 } else if (match_option(option, "-Xprof")) {
3032 #if INCLUDE_FPROF
3033 _has_profile = true;
3034 #else // INCLUDE_FPROF
3035 jio_fprintf(defaultStream::error_stream(),
3036 "Flat profiling is not supported in this VM.\n");
3037 return JNI_ERR;
3038 #endif // INCLUDE_FPROF
3039 // -Xconcurrentio
3040 } else if (match_option(option, "-Xconcurrentio")) {
3041 if (FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true) != Flag::SUCCESS) {
3042 return JNI_EINVAL;
3043 }
3044 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
3045 return JNI_EINVAL;
3046 }
3047 if (FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1) != Flag::SUCCESS) {
3048 return JNI_EINVAL;
3049 }
3050 if (FLAG_SET_CMDLINE(bool, UseTLAB, false) != Flag::SUCCESS) {
3051 return JNI_EINVAL;
3052 }
3053 if (FLAG_SET_CMDLINE(size_t, NewSizeThreadIncrease, 16 * K) != Flag::SUCCESS) { // 20Kb per thread added to new generation
3054 return JNI_EINVAL;
3055 }
3056
3057 // -Xinternalversion
3058 } else if (match_option(option, "-Xinternalversion")) {
3059 jio_fprintf(defaultStream::output_stream(), "%s\n",
3060 VM_Version::internal_vm_info_string());
3061 vm_exit(0);
3062 #ifndef PRODUCT
3063 // -Xprintflags
3064 } else if (match_option(option, "-Xprintflags")) {
3065 CommandLineFlags::printFlags(tty, false);
3066 vm_exit(0);
3067 #endif
3068 // -D
3069 } else if (match_option(option, "-D", &tail)) {
3070 const char* value;
3071 if (match_option(option, "-Djava.endorsed.dirs=", &value) &&
3072 *value!= '\0' && strcmp(value, "\"\"") != 0) {
3073 // abort if -Djava.endorsed.dirs is set
3074 jio_fprintf(defaultStream::output_stream(),
3075 "-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n"
3076 "in modular form will be supported via the concept of upgradeable modules.\n", value);
3077 return JNI_EINVAL;
3078 }
3079 if (match_option(option, "-Djava.ext.dirs=", &value) &&
3080 *value != '\0' && strcmp(value, "\"\"") != 0) {
3081 // abort if -Djava.ext.dirs is set
3082 jio_fprintf(defaultStream::output_stream(),
3083 "-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value);
3084 return JNI_EINVAL;
3085 }
3086
3087 if (!add_property(tail)) {
3088 return JNI_ENOMEM;
3089 }
3090 // Out of the box management support
3091 if (match_option(option, "-Dcom.sun.management", &tail)) {
3092 #if INCLUDE_MANAGEMENT
3093 if (FLAG_SET_CMDLINE(bool, ManagementServer, true) != Flag::SUCCESS) {
3094 return JNI_EINVAL;
3095 }
3096 #else
3097 jio_fprintf(defaultStream::output_stream(),
3098 "-Dcom.sun.management is not supported in this VM.\n");
3099 return JNI_ERR;
3100 #endif
3101 }
3102 // -Xint
3103 } else if (match_option(option, "-Xint")) {
3104 set_mode_flags(_int);
3105 // -Xmixed
3106 } else if (match_option(option, "-Xmixed")) {
3107 set_mode_flags(_mixed);
3108 // -Xcomp
3109 } else if (match_option(option, "-Xcomp")) {
3110 // for testing the compiler; turn off all flags that inhibit compilation
3111 set_mode_flags(_comp);
3112 // -Xshare:dump
3113 } else if (match_option(option, "-Xshare:dump")) {
3114 if (FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true) != Flag::SUCCESS) {
3115 return JNI_EINVAL;
3116 }
3117 set_mode_flags(_int); // Prevent compilation, which creates objects
3118 // -Xshare:on
3119 } else if (match_option(option, "-Xshare:on")) {
3120 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
3121 return JNI_EINVAL;
3122 }
3123 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
3124 return JNI_EINVAL;
3125 }
3126 // -Xshare:auto
3127 } else if (match_option(option, "-Xshare:auto")) {
3128 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
3129 return JNI_EINVAL;
3130 }
3131 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
3132 return JNI_EINVAL;
3133 }
3134 // -Xshare:off
3135 } else if (match_option(option, "-Xshare:off")) {
3136 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, false) != Flag::SUCCESS) {
3137 return JNI_EINVAL;
3138 }
3139 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
3140 return JNI_EINVAL;
3141 }
3142 // -Xverify
3143 } else if (match_option(option, "-Xverify", &tail)) {
3144 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) {
3145 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true) != Flag::SUCCESS) {
3146 return JNI_EINVAL;
3147 }
3148 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
3149 return JNI_EINVAL;
3150 }
3151 } else if (strcmp(tail, ":remote") == 0) {
3152 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
3153 return JNI_EINVAL;
3154 }
3155 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
3156 return JNI_EINVAL;
3157 }
3158 } else if (strcmp(tail, ":none") == 0) {
3159 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
3160 return JNI_EINVAL;
3161 }
3162 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false) != Flag::SUCCESS) {
3163 return JNI_EINVAL;
3164 }
3165 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) {
3166 return JNI_EINVAL;
3167 }
3168 // -Xdebug
3169 } else if (match_option(option, "-Xdebug")) {
3170 // note this flag has been used, then ignore
3171 set_xdebug_mode(true);
3172 // -Xnoagent
3173 } else if (match_option(option, "-Xnoagent")) {
3174 // For compatibility with classic. HotSpot refuses to load the old style agent.dll.
3175 } else if (match_option(option, "-Xloggc:", &tail)) {
3176 // Deprecated flag to redirect GC output to a file. -Xloggc:<filename>
3177 log_warning(gc)("-Xloggc is deprecated. Will use -Xlog:gc:%s instead.", tail);
3178 _gc_log_filename = os::strdup_check_oom(tail);
3179 } else if (match_option(option, "-Xlog", &tail)) {
3180 bool ret = false;
3181 if (strcmp(tail, ":help") == 0) {
3182 LogConfiguration::print_command_line_help(defaultStream::output_stream());
3183 vm_exit(0);
3184 } else if (strcmp(tail, ":disable") == 0) {
3185 LogConfiguration::disable_logging();
3186 ret = true;
3187 } else if (*tail == '\0') {
3188 ret = LogConfiguration::parse_command_line_arguments();
3189 assert(ret, "-Xlog without arguments should never fail to parse");
3190 } else if (*tail == ':') {
3191 ret = LogConfiguration::parse_command_line_arguments(tail + 1);
3192 }
3193 if (ret == false) {
3194 jio_fprintf(defaultStream::error_stream(),
3195 "Invalid -Xlog option '-Xlog%s'\n",
3196 tail);
3197 return JNI_EINVAL;
3198 }
3199 // JNI hooks
3200 } else if (match_option(option, "-Xcheck", &tail)) {
3201 if (!strcmp(tail, ":jni")) {
3202 #if !INCLUDE_JNI_CHECK
3203 warning("JNI CHECKING is not supported in this VM");
3204 #else
3205 CheckJNICalls = true;
3206 #endif // INCLUDE_JNI_CHECK
3207 } else if (is_bad_option(option, args->ignoreUnrecognized,
3208 "check")) {
3209 return JNI_EINVAL;
3210 }
3211 } else if (match_option(option, "vfprintf")) {
3212 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo);
3213 } else if (match_option(option, "exit")) {
3214 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo);
3215 } else if (match_option(option, "abort")) {
3216 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo);
3217 // -XX:+AggressiveHeap
3218 } else if (match_option(option, "-XX:+AggressiveHeap")) {
3219 jint result = set_aggressive_heap_flags();
3220 if (result != JNI_OK) {
3221 return result;
3222 }
3223 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure;
3224 // and the last option wins.
3225 } else if (match_option(option, "-XX:+NeverTenure")) {
3226 if (FLAG_SET_CMDLINE(bool, NeverTenure, true) != Flag::SUCCESS) {
3227 return JNI_EINVAL;
3228 }
3229 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
3230 return JNI_EINVAL;
3231 }
3232 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1) != Flag::SUCCESS) {
3233 return JNI_EINVAL;
3234 }
3235 } else if (match_option(option, "-XX:+AlwaysTenure")) {
3236 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3237 return JNI_EINVAL;
3238 }
3239 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
3240 return JNI_EINVAL;
3241 }
3242 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0) != Flag::SUCCESS) {
3243 return JNI_EINVAL;
3244 }
3245 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) {
3246 uintx max_tenuring_thresh = 0;
3247 if (!parse_uintx(tail, &max_tenuring_thresh, 0)) {
3248 jio_fprintf(defaultStream::error_stream(),
3249 "Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail);
3250 return JNI_EINVAL;
3251 }
3252
3253 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh) != Flag::SUCCESS) {
3254 return JNI_EINVAL;
3255 }
3256
3257 if (MaxTenuringThreshold == 0) {
3258 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3259 return JNI_EINVAL;
3260 }
3261 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
3262 return JNI_EINVAL;
3263 }
3264 } else {
3265 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3266 return JNI_EINVAL;
3267 }
3268 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
3269 return JNI_EINVAL;
3270 }
3271 }
3272 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) {
3273 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false) != Flag::SUCCESS) {
3274 return JNI_EINVAL;
3275 }
3276 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true) != Flag::SUCCESS) {
3277 return JNI_EINVAL;
3278 }
3279 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) {
3280 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false) != Flag::SUCCESS) {
3281 return JNI_EINVAL;
3282 }
3283 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true) != Flag::SUCCESS) {
3284 return JNI_EINVAL;
3285 }
3286 } else if (match_option(option, "-XX:+ExtendedDTraceProbes")) {
3287 #if defined(DTRACE_ENABLED)
3288 if (FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true) != Flag::SUCCESS) {
3289 return JNI_EINVAL;
3290 }
3291 if (FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true) != Flag::SUCCESS) {
3292 return JNI_EINVAL;
3293 }
3294 if (FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true) != Flag::SUCCESS) {
3295 return JNI_EINVAL;
3296 }
3297 if (FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true) != Flag::SUCCESS) {
3298 return JNI_EINVAL;
3299 }
3300 #else // defined(DTRACE_ENABLED)
3301 jio_fprintf(defaultStream::error_stream(),
3302 "ExtendedDTraceProbes flag is not applicable for this configuration\n");
3303 return JNI_EINVAL;
3304 #endif // defined(DTRACE_ENABLED)
3305 #ifdef ASSERT
3306 } else if (match_option(option, "-XX:+FullGCALot")) {
3307 if (FLAG_SET_CMDLINE(bool, FullGCALot, true) != Flag::SUCCESS) {
3308 return JNI_EINVAL;
3309 }
3310 // disable scavenge before parallel mark-compact
3311 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
3312 return JNI_EINVAL;
3313 }
3314 #endif
3315 #if !INCLUDE_MANAGEMENT
3316 } else if (match_option(option, "-XX:+ManagementServer")) {
3317 jio_fprintf(defaultStream::error_stream(),
3318 "ManagementServer is not supported in this VM.\n");
3319 return JNI_ERR;
3320 #endif // INCLUDE_MANAGEMENT
3321 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx
3322 // Skip -XX:Flags= and -XX:VMOptionsFile= since those cases have
3323 // already been handled
3324 if ((strncmp(tail, "Flags=", strlen("Flags=")) != 0) &&
3325 (strncmp(tail, "VMOptionsFile=", strlen("VMOptionsFile=")) != 0)) {
3326 if (!process_argument(tail, args->ignoreUnrecognized, origin)) {
3327 return JNI_EINVAL;
3328 }
3329 }
3330 // Unknown option
3331 } else if (is_bad_option(option, args->ignoreUnrecognized)) {
3332 return JNI_ERR;
3333 }
3334 }
3335
3336 // PrintSharedArchiveAndExit will turn on
3337 // -Xshare:on
3338 // -Xlog:classpath=info
3339 if (PrintSharedArchiveAndExit) {
3340 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
3341 return JNI_EINVAL;
3342 }
3343 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
3344 return JNI_EINVAL;
3345 }
3346 LogConfiguration::configure_stdout(LogLevel::Info, true, LOG_TAGS(classpath));
3347 }
3348
3349 // Change the default value for flags which have different default values
3350 // when working with older JDKs.
3351 #ifdef LINUX
3352 if (JDK_Version::current().compare_major(6) <= 0 &&
3353 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) {
3354 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false);
3355 }
3356 #endif // LINUX
3357 fix_appclasspath();
3358 return JNI_OK;
3359 }
3360
3361 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled)
3362 //
3363 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar
3364 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar".
3365 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty
3366 // path is treated as the current directory.
3367 //
3368 // This causes problems with CDS, which requires that all directories specified in the classpath
3369 // must be empty. In most cases, applications do NOT want to load classes from the current
3370 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up
3371 // scripts compatible with CDS.
3372 void Arguments::fix_appclasspath() {
3373 if (IgnoreEmptyClassPaths) {
3374 const char separator = *os::path_separator();
3375 const char* src = _java_class_path->value();
3376
3377 // skip over all the leading empty paths
3378 while (*src == separator) {
3379 src ++;
3380 }
3381
3382 char* copy = os::strdup_check_oom(src, mtInternal);
3383
3384 // trim all trailing empty paths
3385 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) {
3386 *tail = '\0';
3387 }
3388
3389 char from[3] = {separator, separator, '\0'};
3390 char to [2] = {separator, '\0'};
3391 while (StringUtils::replace_no_expand(copy, from, to) > 0) {
3392 // Keep replacing "::" -> ":" until we have no more "::" (non-windows)
3393 // Keep replacing ";;" -> ";" until we have no more ";;" (windows)
3394 }
3395
3396 _java_class_path->set_value(copy);
3397 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore
3398 }
3399 }
3400
3401 static bool has_jar_files(const char* directory) {
3402 DIR* dir = os::opendir(directory);
3403 if (dir == NULL) return false;
3404
3405 struct dirent *entry;
3406 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtInternal);
3407 bool hasJarFile = false;
3408 while (!hasJarFile && (entry = os::readdir(dir, (dirent *) dbuf)) != NULL) {
3409 const char* name = entry->d_name;
3410 const char* ext = name + strlen(name) - 4;
3411 hasJarFile = ext > name && (os::file_name_strcmp(ext, ".jar") == 0);
3412 }
3413 FREE_C_HEAP_ARRAY(char, dbuf);
3414 os::closedir(dir);
3415 return hasJarFile ;
3416 }
3417
3418 static int check_non_empty_dirs(const char* path) {
3419 const char separator = *os::path_separator();
3420 const char* const end = path + strlen(path);
3421 int nonEmptyDirs = 0;
3422 while (path < end) {
3423 const char* tmp_end = strchr(path, separator);
3424 if (tmp_end == NULL) {
3425 if (has_jar_files(path)) {
3426 nonEmptyDirs++;
3427 jio_fprintf(defaultStream::output_stream(),
3428 "Non-empty directory: %s\n", path);
3429 }
3430 path = end;
3431 } else {
3432 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1, mtInternal);
3433 memcpy(dirpath, path, tmp_end - path);
3434 dirpath[tmp_end - path] = '\0';
3435 if (has_jar_files(dirpath)) {
3436 nonEmptyDirs++;
3437 jio_fprintf(defaultStream::output_stream(),
3438 "Non-empty directory: %s\n", dirpath);
3439 }
3440 FREE_C_HEAP_ARRAY(char, dirpath);
3441 path = tmp_end + 1;
3442 }
3443 }
3444 return nonEmptyDirs;
3445 }
3446
3447 jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) {
3448 // check if the default lib/endorsed directory exists; if so, error
3449 char path[JVM_MAXPATHLEN];
3450 const char* fileSep = os::file_separator();
3451 sprintf(path, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep);
3452
3453 if (CheckEndorsedAndExtDirs) {
3454 int nonEmptyDirs = 0;
3455 // check endorsed directory
3456 nonEmptyDirs += check_non_empty_dirs(path);
3457 // check the extension directories
3458 nonEmptyDirs += check_non_empty_dirs(Arguments::get_ext_dirs());
3459 if (nonEmptyDirs > 0) {
3460 return JNI_ERR;
3461 }
3462 }
3463
3464 DIR* dir = os::opendir(path);
3465 if (dir != NULL) {
3466 jio_fprintf(defaultStream::output_stream(),
3467 "<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n"
3468 "in modular form will be supported via the concept of upgradeable modules.\n");
3469 os::closedir(dir);
3470 return JNI_ERR;
3471 }
3472
3473 sprintf(path, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep);
3474 dir = os::opendir(path);
3475 if (dir != NULL) {
3476 jio_fprintf(defaultStream::output_stream(),
3477 "<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; "
3478 "Use -classpath instead.\n.");
3479 os::closedir(dir);
3480 return JNI_ERR;
3481 }
3482
3483 if (scp_assembly_required) {
3484 // Assemble the bootclasspath elements into the final path.
3485 char *combined_path = scp_p->combined_path();
3486 Arguments::set_sysclasspath(combined_path);
3487 FREE_C_HEAP_ARRAY(char, combined_path);
3488 }
3489
3490 // This must be done after all arguments have been processed.
3491 // java_compiler() true means set to "NONE" or empty.
3492 if (java_compiler() && !xdebug_mode()) {
3493 // For backwards compatibility, we switch to interpreted mode if
3494 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was
3495 // not specified.
3496 set_mode_flags(_int);
3497 }
3498
3499 // CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode),
3500 // but like -Xint, leave compilation thresholds unaffected.
3501 // With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well.
3502 if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) {
3503 set_mode_flags(_int);
3504 }
3505
3506 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set
3507 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) {
3508 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold);
3509 }
3510
3511 #if !defined(COMPILER2) && !INCLUDE_JVMCI
3512 // Don't degrade server performance for footprint
3513 if (FLAG_IS_DEFAULT(UseLargePages) &&
3514 MaxHeapSize < LargePageHeapSizeThreshold) {
3515 // No need for large granularity pages w/small heaps.
3516 // Note that large pages are enabled/disabled for both the
3517 // Java heap and the code cache.
3518 FLAG_SET_DEFAULT(UseLargePages, false);
3519 }
3520
3521 #elif defined(COMPILER2)
3522 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) {
3523 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1);
3524 }
3525 #endif
3526
3527 #ifndef TIERED
3528 // Tiered compilation is undefined.
3529 UNSUPPORTED_OPTION(TieredCompilation, "TieredCompilation");
3530 #endif
3531
3532 // If we are running in a headless jre, force java.awt.headless property
3533 // to be true unless the property has already been set.
3534 // Also allow the OS environment variable JAVA_AWT_HEADLESS to set headless state.
3535 if (os::is_headless_jre()) {
3536 const char* headless = Arguments::get_property("java.awt.headless");
3537 if (headless == NULL) {
3538 const char *headless_env = ::getenv("JAVA_AWT_HEADLESS");
3539 if (headless_env == NULL) {
3540 if (!add_property("java.awt.headless=true")) {
3541 return JNI_ENOMEM;
3542 }
3543 } else {
3544 char buffer[256];
3545 jio_snprintf(buffer, sizeof(buffer), "java.awt.headless=%s", headless_env);
3546 if (!add_property(buffer)) {
3547 return JNI_ENOMEM;
3548 }
3549 }
3550 }
3551 }
3552
3553 if (UseConcMarkSweepGC && FLAG_IS_DEFAULT(UseParNewGC) && !UseParNewGC) {
3554 // CMS can only be used with ParNew
3555 FLAG_SET_ERGO(bool, UseParNewGC, true);
3556 }
3557
3558 if (!check_vm_args_consistency()) {
3559 return JNI_ERR;
3560 }
3561
3562 return JNI_OK;
3563 }
3564
3565 // Helper class for controlling the lifetime of JavaVMInitArgs
3566 // objects. The contents of the JavaVMInitArgs are guaranteed to be
3567 // deleted on the destruction of the ScopedVMInitArgs object.
3568 class ScopedVMInitArgs : public StackObj {
3569 private:
3570 JavaVMInitArgs _args;
3571 char* _container_name;
3572 bool _is_set;
3573 char* _vm_options_file_arg;
3574
3575 public:
3576 ScopedVMInitArgs(const char *container_name) {
3577 _args.version = JNI_VERSION_1_2;
3578 _args.nOptions = 0;
3579 _args.options = NULL;
3580 _args.ignoreUnrecognized = false;
3581 _container_name = (char *)container_name;
3582 _is_set = false;
3583 _vm_options_file_arg = NULL;
3584 }
3585
3586 // Populates the JavaVMInitArgs object represented by this
3587 // ScopedVMInitArgs object with the arguments in options. The
3588 // allocated memory is deleted by the destructor. If this method
3589 // returns anything other than JNI_OK, then this object is in a
3590 // partially constructed state, and should be abandoned.
3591 jint set_args(GrowableArray<JavaVMOption>* options) {
3592 _is_set = true;
3593 JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL(
3594 JavaVMOption, options->length(), mtInternal);
3595 if (options_arr == NULL) {
3596 return JNI_ENOMEM;
3597 }
3598 _args.options = options_arr;
3599
3600 for (int i = 0; i < options->length(); i++) {
3601 options_arr[i] = options->at(i);
3602 options_arr[i].optionString = os::strdup(options_arr[i].optionString);
3603 if (options_arr[i].optionString == NULL) {
3604 // Rely on the destructor to do cleanup.
3605 _args.nOptions = i;
3606 return JNI_ENOMEM;
3607 }
3608 }
3609
3610 _args.nOptions = options->length();
3611 _args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions;
3612 return JNI_OK;
3613 }
3614
3615 JavaVMInitArgs* get() { return &_args; }
3616 char* container_name() { return _container_name; }
3617 bool is_set() { return _is_set; }
3618 bool found_vm_options_file_arg() { return _vm_options_file_arg != NULL; }
3619 char* vm_options_file_arg() { return _vm_options_file_arg; }
3620
3621 void set_vm_options_file_arg(const char *vm_options_file_arg) {
3622 if (_vm_options_file_arg != NULL) {
3623 os::free(_vm_options_file_arg);
3624 }
3625 _vm_options_file_arg = os::strdup_check_oom(vm_options_file_arg);
3626 }
3627
3628 ~ScopedVMInitArgs() {
3629 if (_vm_options_file_arg != NULL) {
3630 os::free(_vm_options_file_arg);
3631 }
3632 if (_args.options == NULL) return;
3633 for (int i = 0; i < _args.nOptions; i++) {
3634 os::free(_args.options[i].optionString);
3635 }
3636 FREE_C_HEAP_ARRAY(JavaVMOption, _args.options);
3637 }
3638
3639 // Insert options into this option list, to replace option at
3640 // vm_options_file_pos (-XX:VMOptionsFile)
3641 jint insert(const JavaVMInitArgs* args,
3642 const JavaVMInitArgs* args_to_insert,
3643 const int vm_options_file_pos) {
3644 assert(_args.options == NULL, "shouldn't be set yet");
3645 assert(args_to_insert->nOptions != 0, "there should be args to insert");
3646 assert(vm_options_file_pos != -1, "vm_options_file_pos should be set");
3647
3648 int length = args->nOptions + args_to_insert->nOptions - 1;
3649 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtInternal)
3650 GrowableArray<JavaVMOption>(length, true); // Construct new option array
3651 for (int i = 0; i < args->nOptions; i++) {
3652 if (i == vm_options_file_pos) {
3653 // insert the new options starting at the same place as the
3654 // -XX:VMOptionsFile option
3655 for (int j = 0; j < args_to_insert->nOptions; j++) {
3656 options->push(args_to_insert->options[j]);
3657 }
3658 } else {
3659 options->push(args->options[i]);
3660 }
3661 }
3662 // make into options array
3663 jint result = set_args(options);
3664 delete options;
3665 return result;
3666 }
3667 };
3668
3669 jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) {
3670 return parse_options_environment_variable("_JAVA_OPTIONS", args);
3671 }
3672
3673 jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) {
3674 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args);
3675 }
3676
3677 jint Arguments::parse_options_environment_variable(const char* name,
3678 ScopedVMInitArgs* vm_args) {
3679 char *buffer = ::getenv(name);
3680
3681 // Don't check this environment variable if user has special privileges
3682 // (e.g. unix su command).
3683 if (buffer == NULL || os::have_special_privileges()) {
3684 return JNI_OK;
3685 }
3686
3687 if ((buffer = os::strdup(buffer)) == NULL) {
3688 return JNI_ENOMEM;
3689 }
3690
3691 int retcode = parse_options_buffer(name, buffer, strlen(buffer), vm_args);
3692
3693 os::free(buffer);
3694 return retcode;
3695 }
3696
3697 jint Arguments::parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args) {
3698 // read file into buffer
3699 int fd = ::open(file_name, O_RDONLY);
3700 if (fd < 0) {
3701 jio_fprintf(defaultStream::error_stream(),
3702 "Could not open options file '%s'\n",
3703 file_name);
3704 return JNI_ERR;
3705 }
3706
3707 struct stat stbuf;
3708 int retcode = os::stat(file_name, &stbuf);
3709 if (retcode != 0) {
3710 jio_fprintf(defaultStream::error_stream(),
3711 "Could not stat options file '%s'\n",
3712 file_name);
3713 os::close(fd);
3714 return JNI_ERR;
3715 }
3716
3717 if (stbuf.st_size == 0) {
3718 // tell caller there is no option data and that is ok
3719 os::close(fd);
3720 return JNI_OK;
3721 }
3722
3723 // '+ 1' for NULL termination even with max bytes
3724 size_t bytes_alloc = stbuf.st_size + 1;
3725
3726 char *buf = NEW_C_HEAP_ARRAY_RETURN_NULL(char, bytes_alloc, mtInternal);
3727 if (NULL == buf) {
3728 jio_fprintf(defaultStream::error_stream(),
3729 "Could not allocate read buffer for options file parse\n");
3730 os::close(fd);
3731 return JNI_ENOMEM;
3732 }
3733
3734 memset(buf, 0, bytes_alloc);
3735
3736 // Fill buffer
3737 // Use ::read() instead of os::read because os::read()
3738 // might do a thread state transition
3739 // and it is too early for that here
3740
3741 ssize_t bytes_read = ::read(fd, (void *)buf, (unsigned)bytes_alloc);
3742 os::close(fd);
3743 if (bytes_read < 0) {
3744 FREE_C_HEAP_ARRAY(char, buf);
3745 jio_fprintf(defaultStream::error_stream(),
3746 "Could not read options file '%s'\n", file_name);
3747 return JNI_ERR;
3748 }
3749
3750 if (bytes_read == 0) {
3751 // tell caller there is no option data and that is ok
3752 FREE_C_HEAP_ARRAY(char, buf);
3753 return JNI_OK;
3754 }
3755
3756 retcode = parse_options_buffer(file_name, buf, bytes_read, vm_args);
3757
3758 FREE_C_HEAP_ARRAY(char, buf);
3759 return retcode;
3760 }
3761
3762 jint Arguments::parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args) {
3763 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JavaVMOption>(2, true); // Construct option array
3764
3765 // some pointers to help with parsing
3766 char *buffer_end = buffer + buf_len;
3767 char *opt_hd = buffer;
3768 char *wrt = buffer;
3769 char *rd = buffer;
3770
3771 // parse all options
3772 while (rd < buffer_end) {
3773 // skip leading white space from the input string
3774 while (rd < buffer_end && isspace(*rd)) {
3775 rd++;
3776 }
3777
3778 if (rd >= buffer_end) {
3779 break;
3780 }
3781
3782 // Remember this is where we found the head of the token.
3783 opt_hd = wrt;
3784
3785 // Tokens are strings of non white space characters separated
3786 // by one or more white spaces.
3787 while (rd < buffer_end && !isspace(*rd)) {
3788 if (*rd == '\'' || *rd == '"') { // handle a quoted string
3789 int quote = *rd; // matching quote to look for
3790 rd++; // don't copy open quote
3791 while (rd < buffer_end && *rd != quote) {
3792 // include everything (even spaces)
3793 // up until the close quote
3794 *wrt++ = *rd++; // copy to option string
3795 }
3796
3797 if (rd < buffer_end) {
3798 rd++; // don't copy close quote
3799 } else {
3800 // did not see closing quote
3801 jio_fprintf(defaultStream::error_stream(),
3802 "Unmatched quote in %s\n", name);
3803 delete options;
3804 return JNI_ERR;
3805 }
3806 } else {
3807 *wrt++ = *rd++; // copy to option string
3808 }
3809 }
3810
3811 // steal a white space character and set it to NULL
3812 *wrt++ = '\0';
3813 // We now have a complete token
3814
3815 JavaVMOption option;
3816 option.optionString = opt_hd;
3817 option.extraInfo = NULL;
3818
3819 options->append(option); // Fill in option
3820
3821 rd++; // Advance to next character
3822 }
3823
3824 // Fill out JavaVMInitArgs structure.
3825 jint status = vm_args->set_args(options);
3826
3827 delete options;
3828 return status;
3829 }
3830
3831 void Arguments::set_shared_spaces_flags() {
3832 if (DumpSharedSpaces) {
3833 if (RequireSharedSpaces) {
3834 warning("Cannot dump shared archive while using shared archive");
3835 }
3836 UseSharedSpaces = false;
3837 #ifdef _LP64
3838 if (!UseCompressedOops || !UseCompressedClassPointers) {
3839 vm_exit_during_initialization(
3840 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL);
3841 }
3842 } else {
3843 if (!UseCompressedOops || !UseCompressedClassPointers) {
3844 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces.");
3845 }
3846 #endif
3847 }
3848 }
3849
3850 #if !INCLUDE_ALL_GCS
3851 static void force_serial_gc() {
3852 FLAG_SET_DEFAULT(UseSerialGC, true);
3853 UNSUPPORTED_GC_OPTION(UseG1GC);
3854 UNSUPPORTED_GC_OPTION(UseParallelGC);
3855 UNSUPPORTED_GC_OPTION(UseParallelOldGC);
3856 UNSUPPORTED_GC_OPTION(UseConcMarkSweepGC);
3857 UNSUPPORTED_GC_OPTION(UseParNewGC);
3858 }
3859 #endif // INCLUDE_ALL_GCS
3860
3861 // Sharing support
3862 // Construct the path to the archive
3863 static char* get_shared_archive_path() {
3864 char *shared_archive_path;
3865 if (SharedArchiveFile == NULL) {
3866 char jvm_path[JVM_MAXPATHLEN];
3867 os::jvm_path(jvm_path, sizeof(jvm_path));
3868 char *end = strrchr(jvm_path, *os::file_separator());
3869 if (end != NULL) *end = '\0';
3870 size_t jvm_path_len = strlen(jvm_path);
3871 size_t file_sep_len = strlen(os::file_separator());
3872 const size_t len = jvm_path_len + file_sep_len + 20;
3873 shared_archive_path = NEW_C_HEAP_ARRAY(char, len, mtInternal);
3874 if (shared_archive_path != NULL) {
3875 jio_snprintf(shared_archive_path, len, "%s%sclasses.jsa",
3876 jvm_path, os::file_separator());
3877 }
3878 } else {
3879 shared_archive_path = os::strdup_check_oom(SharedArchiveFile, mtInternal);
3880 }
3881 return shared_archive_path;
3882 }
3883
3884 #ifndef PRODUCT
3885 // Determine whether LogVMOutput should be implicitly turned on.
3886 static bool use_vm_log() {
3887 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) ||
3888 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods ||
3889 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers ||
3890 PrintAssembly || TraceDeoptimization || TraceDependencies ||
3891 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) {
3892 return true;
3893 }
3894
3895 #ifdef COMPILER1
3896 if (PrintC1Statistics) {
3897 return true;
3898 }
3899 #endif // COMPILER1
3900
3901 #ifdef COMPILER2
3902 if (PrintOptoAssembly || PrintOptoStatistics) {
3903 return true;
3904 }
3905 #endif // COMPILER2
3906
3907 return false;
3908 }
3909
3910 #endif // PRODUCT
3911
3912 bool Arguments::args_contains_vm_options_file_arg(const JavaVMInitArgs* args) {
3913 for (int index = 0; index < args->nOptions; index++) {
3914 const JavaVMOption* option = args->options + index;
3915 const char* tail;
3916 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
3917 return true;
3918 }
3919 }
3920 return false;
3921 }
3922
3923 jint Arguments::insert_vm_options_file(const JavaVMInitArgs* args,
3924 const char* vm_options_file,
3925 const int vm_options_file_pos,
3926 ScopedVMInitArgs* vm_options_file_args,
3927 ScopedVMInitArgs* args_out) {
3928 jint code = parse_vm_options_file(vm_options_file, vm_options_file_args);
3929 if (code != JNI_OK) {
3930 return code;
3931 }
3932
3933 if (vm_options_file_args->get()->nOptions < 1) {
3934 return JNI_OK;
3935 }
3936
3937 if (args_contains_vm_options_file_arg(vm_options_file_args->get())) {
3938 jio_fprintf(defaultStream::error_stream(),
3939 "A VM options file may not refer to a VM options file. "
3940 "Specification of '-XX:VMOptionsFile=<file-name>' in the "
3941 "options file '%s' in options container '%s' is an error.\n",
3942 vm_options_file_args->vm_options_file_arg(),
3943 vm_options_file_args->container_name());
3944 return JNI_EINVAL;
3945 }
3946
3947 return args_out->insert(args, vm_options_file_args->get(),
3948 vm_options_file_pos);
3949 }
3950
3951 // Expand -XX:VMOptionsFile found in args_in as needed.
3952 // mod_args and args_out parameters may return values as needed.
3953 jint Arguments::expand_vm_options_as_needed(const JavaVMInitArgs* args_in,
3954 ScopedVMInitArgs* mod_args,
3955 JavaVMInitArgs** args_out) {
3956 jint code = match_special_option_and_act(args_in, mod_args);
3957 if (code != JNI_OK) {
3958 return code;
3959 }
3960
3961 if (mod_args->is_set()) {
3962 // args_in contains -XX:VMOptionsFile and mod_args contains the
3963 // original options from args_in along with the options expanded
3964 // from the VMOptionsFile. Return a short-hand to the caller.
3965 *args_out = mod_args->get();
3966 } else {
3967 *args_out = (JavaVMInitArgs *)args_in; // no changes so use args_in
3968 }
3969 return JNI_OK;
3970 }
3971
3972 jint Arguments::match_special_option_and_act(const JavaVMInitArgs* args,
3973 ScopedVMInitArgs* args_out) {
3974 // Remaining part of option string
3975 const char* tail;
3976 ScopedVMInitArgs vm_options_file_args(args_out->container_name());
3977
3978 for (int index = 0; index < args->nOptions; index++) {
3979 const JavaVMOption* option = args->options + index;
3980 if (ArgumentsExt::process_options(option)) {
3981 continue;
3982 }
3983 if (match_option(option, "-XX:Flags=", &tail)) {
3984 Arguments::set_jvm_flags_file(tail);
3985 continue;
3986 }
3987 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
3988 if (vm_options_file_args.found_vm_options_file_arg()) {
3989 jio_fprintf(defaultStream::error_stream(),
3990 "The option '%s' is already specified in the options "
3991 "container '%s' so the specification of '%s' in the "
3992 "same options container is an error.\n",
3993 vm_options_file_args.vm_options_file_arg(),
3994 vm_options_file_args.container_name(),
3995 option->optionString);
3996 return JNI_EINVAL;
3997 }
3998 vm_options_file_args.set_vm_options_file_arg(option->optionString);
3999 // If there's a VMOptionsFile, parse that
4000 jint code = insert_vm_options_file(args, tail, index,
4001 &vm_options_file_args, args_out);
4002 if (code != JNI_OK) {
4003 return code;
4004 }
4005 args_out->set_vm_options_file_arg(vm_options_file_args.vm_options_file_arg());
4006 if (args_out->is_set()) {
4007 // The VMOptions file inserted some options so switch 'args'
4008 // to the new set of options, and continue processing which
4009 // preserves "last option wins" semantics.
4010 args = args_out->get();
4011 // The first option from the VMOptionsFile replaces the
4012 // current option. So we back track to process the
4013 // replacement option.
4014 index--;
4015 }
4016 continue;
4017 }
4018 if (match_option(option, "-XX:+PrintVMOptions")) {
4019 PrintVMOptions = true;
4020 continue;
4021 }
4022 if (match_option(option, "-XX:-PrintVMOptions")) {
4023 PrintVMOptions = false;
4024 continue;
4025 }
4026 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) {
4027 IgnoreUnrecognizedVMOptions = true;
4028 continue;
4029 }
4030 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) {
4031 IgnoreUnrecognizedVMOptions = false;
4032 continue;
4033 }
4034 if (match_option(option, "-XX:+PrintFlagsInitial")) {
4035 CommandLineFlags::printFlags(tty, false);
4036 vm_exit(0);
4037 }
4038 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) {
4039 #if INCLUDE_NMT
4040 // The launcher did not setup nmt environment variable properly.
4041 if (!MemTracker::check_launcher_nmt_support(tail)) {
4042 warning("Native Memory Tracking did not setup properly, using wrong launcher?");
4043 }
4044
4045 // Verify if nmt option is valid.
4046 if (MemTracker::verify_nmt_option()) {
4047 // Late initialization, still in single-threaded mode.
4048 if (MemTracker::tracking_level() >= NMT_summary) {
4049 MemTracker::init();
4050 }
4051 } else {
4052 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL);
4053 }
4054 continue;
4055 #else
4056 jio_fprintf(defaultStream::error_stream(),
4057 "Native Memory Tracking is not supported in this VM\n");
4058 return JNI_ERR;
4059 #endif
4060 }
4061
4062 #ifndef PRODUCT
4063 if (match_option(option, "-XX:+PrintFlagsWithComments")) {
4064 CommandLineFlags::printFlags(tty, true);
4065 vm_exit(0);
4066 }
4067 #endif
4068 }
4069 return JNI_OK;
4070 }
4071
4072 static void print_options(const JavaVMInitArgs *args) {
4073 const char* tail;
4074 for (int index = 0; index < args->nOptions; index++) {
4075 const JavaVMOption *option = args->options + index;
4076 if (match_option(option, "-XX:", &tail)) {
4077 logOption(tail);
4078 }
4079 }
4080 }
4081
4082 bool Arguments::handle_deprecated_print_gc_flags() {
4083 if (PrintGC) {
4084 log_warning(gc)("-XX:+PrintGC is deprecated. Will use -Xlog:gc instead.");
4085 }
4086 if (PrintGCDetails) {
4087 log_warning(gc)("-XX:+PrintGCDetails is deprecated. Will use -Xlog:gc* instead.");
4088 }
4089
4090 if (_gc_log_filename != NULL) {
4091 // -Xloggc was used to specify a filename
4092 const char* gc_conf = PrintGCDetails ? "gc*" : "gc";
4093 return LogConfiguration::parse_log_arguments(_gc_log_filename, gc_conf, NULL, NULL, NULL);
4094 } else if (PrintGC || PrintGCDetails) {
4095 LogConfiguration::configure_stdout(LogLevel::Info, !PrintGCDetails, LOG_TAGS(gc));
4096 }
4097 return true;
4098 }
4099
4100 // Parse entry point called from JNI_CreateJavaVM
4101
4102 jint Arguments::parse(const JavaVMInitArgs* initial_cmd_args) {
4103 assert(verify_special_jvm_flags(), "deprecated and obsolete flag table inconsistent");
4104
4105 // Initialize ranges and constraints
4106 CommandLineFlagRangeList::init();
4107 CommandLineFlagConstraintList::init();
4108
4109 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed.
4110 const char* hotspotrc = ".hotspotrc";
4111 bool settings_file_specified = false;
4112 bool needs_hotspotrc_warning = false;
4113 ScopedVMInitArgs initial_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
4114 ScopedVMInitArgs initial_java_options_args("env_var='_JAVA_OPTIONS'");
4115
4116 // Pointers to current working set of containers
4117 JavaVMInitArgs* cur_cmd_args;
4118 JavaVMInitArgs* cur_java_options_args;
4119 JavaVMInitArgs* cur_java_tool_options_args;
4120
4121 // Containers for modified/expanded options
4122 ScopedVMInitArgs mod_cmd_args("cmd_line_args");
4123 ScopedVMInitArgs mod_java_tool_options_args("env_var='JAVA_TOOL_OPTIONS'");
4124 ScopedVMInitArgs mod_java_options_args("env_var='_JAVA_OPTIONS'");
4125
4126
4127 jint code =
4128 parse_java_tool_options_environment_variable(&initial_java_tool_options_args);
4129 if (code != JNI_OK) {
4130 return code;
4131 }
4132
4133 code = parse_java_options_environment_variable(&initial_java_options_args);
4134 if (code != JNI_OK) {
4135 return code;
4136 }
4137
4138 code = expand_vm_options_as_needed(initial_java_tool_options_args.get(),
4139 &mod_java_tool_options_args,
4140 &cur_java_tool_options_args);
4141 if (code != JNI_OK) {
4142 return code;
4143 }
4144
4145 code = expand_vm_options_as_needed(initial_cmd_args,
4146 &mod_cmd_args,
4147 &cur_cmd_args);
4148 if (code != JNI_OK) {
4149 return code;
4150 }
4151
4152 code = expand_vm_options_as_needed(initial_java_options_args.get(),
4153 &mod_java_options_args,
4154 &cur_java_options_args);
4155 if (code != JNI_OK) {
4156 return code;
4157 }
4158
4159 const char* flags_file = Arguments::get_jvm_flags_file();
4160 settings_file_specified = (flags_file != NULL);
4161
4162 if (IgnoreUnrecognizedVMOptions) {
4163 cur_cmd_args->ignoreUnrecognized = true;
4164 cur_java_tool_options_args->ignoreUnrecognized = true;
4165 cur_java_options_args->ignoreUnrecognized = true;
4166 }
4167
4168 // Parse specified settings file
4169 if (settings_file_specified) {
4170 if (!process_settings_file(flags_file, true,
4171 cur_cmd_args->ignoreUnrecognized)) {
4172 return JNI_EINVAL;
4173 }
4174 } else {
4175 #ifdef ASSERT
4176 // Parse default .hotspotrc settings file
4177 if (!process_settings_file(".hotspotrc", false,
4178 cur_cmd_args->ignoreUnrecognized)) {
4179 return JNI_EINVAL;
4180 }
4181 #else
4182 struct stat buf;
4183 if (os::stat(hotspotrc, &buf) == 0) {
4184 needs_hotspotrc_warning = true;
4185 }
4186 #endif
4187 }
4188
4189 if (PrintVMOptions) {
4190 print_options(cur_java_tool_options_args);
4191 print_options(cur_cmd_args);
4192 print_options(cur_java_options_args);
4193 }
4194
4195 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS
4196 jint result = parse_vm_init_args(cur_java_tool_options_args,
4197 cur_java_options_args,
4198 cur_cmd_args);
4199
4200 if (result != JNI_OK) {
4201 return result;
4202 }
4203
4204 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed.
4205 SharedArchivePath = get_shared_archive_path();
4206 if (SharedArchivePath == NULL) {
4207 return JNI_ENOMEM;
4208 }
4209
4210 // Set up VerifySharedSpaces
4211 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) {
4212 VerifySharedSpaces = true;
4213 }
4214
4215 // Delay warning until here so that we've had a chance to process
4216 // the -XX:-PrintWarnings flag
4217 if (needs_hotspotrc_warning) {
4218 warning("%s file is present but has been ignored. "
4219 "Run with -XX:Flags=%s to load the file.",
4220 hotspotrc, hotspotrc);
4221 }
4222
4223 #if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
4224 UNSUPPORTED_OPTION(UseLargePages, "-XX:+UseLargePages");
4225 #endif
4226
4227 ArgumentsExt::report_unsupported_options();
4228
4229 #ifndef PRODUCT
4230 if (TraceBytecodesAt != 0) {
4231 TraceBytecodes = true;
4232 }
4233 if (CountCompiledCalls) {
4234 if (UseCounterDecay) {
4235 warning("UseCounterDecay disabled because CountCalls is set");
4236 UseCounterDecay = false;
4237 }
4238 }
4239 #endif // PRODUCT
4240
4241 if (ScavengeRootsInCode == 0) {
4242 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) {
4243 warning("Forcing ScavengeRootsInCode non-zero");
4244 }
4245 ScavengeRootsInCode = 1;
4246 }
4247
4248 if (!handle_deprecated_print_gc_flags()) {
4249 return JNI_EINVAL;
4250 }
4251
4252 // Set object alignment values.
4253 set_object_alignment();
4254
4255 #if !INCLUDE_ALL_GCS
4256 force_serial_gc();
4257 #endif // INCLUDE_ALL_GCS
4258 #if !INCLUDE_CDS
4259 if (DumpSharedSpaces || RequireSharedSpaces) {
4260 jio_fprintf(defaultStream::error_stream(),
4261 "Shared spaces are not supported in this VM\n");
4262 return JNI_ERR;
4263 }
4264 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) || PrintSharedSpaces) {
4265 warning("Shared spaces are not supported in this VM");
4266 FLAG_SET_DEFAULT(UseSharedSpaces, false);
4267 FLAG_SET_DEFAULT(PrintSharedSpaces, false);
4268 }
4269 no_shared_spaces("CDS Disabled");
4270 #endif // INCLUDE_CDS
4271
4272 return JNI_OK;
4273 }
4274
4275 jint Arguments::apply_ergo() {
4276
4277 // Set flags based on ergonomics.
4278 set_ergonomics_flags();
4279
4280 set_shared_spaces_flags();
4281
4282 // Check the GC selections again.
4283 if (!check_gc_consistency()) {
4284 return JNI_EINVAL;
4285 }
4286
4287 if (TieredCompilation) {
4288 set_tiered_flags();
4289 } else {
4290 int max_compilation_policy_choice = 1;
4291 #ifdef COMPILER2
4292 max_compilation_policy_choice = 2;
4293 #endif
4294 // Check if the policy is valid.
4295 if (CompilationPolicyChoice >= max_compilation_policy_choice) {
4296 vm_exit_during_initialization(
4297 "Incompatible compilation policy selected", NULL);
4298 }
4299 // Scale CompileThreshold
4300 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves CompileThreshold unchanged.
4301 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
4302 FLAG_SET_ERGO(intx, CompileThreshold, scaled_compile_threshold(CompileThreshold));
4303 }
4304 }
4305
4306 #ifdef COMPILER2
4307 #ifndef PRODUCT
4308 if (PrintIdealGraphLevel > 0) {
4309 FLAG_SET_ERGO(bool, PrintIdealGraph, true);
4310 }
4311 #endif
4312 #endif
4313
4314 // Set heap size based on available physical memory
4315 set_heap_size();
4316
4317 ArgumentsExt::set_gc_specific_flags();
4318
4319 // Initialize Metaspace flags and alignments
4320 Metaspace::ergo_initialize();
4321
4322 // Set bytecode rewriting flags
4323 set_bytecode_flags();
4324
4325 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled
4326 jint code = set_aggressive_opts_flags();
4327 if (code != JNI_OK) {
4328 return code;
4329 }
4330
4331 // Turn off biased locking for locking debug mode flags,
4332 // which are subtly different from each other but neither works with
4333 // biased locking
4334 if (UseHeavyMonitors
4335 #ifdef COMPILER1
4336 || !UseFastLocking
4337 #endif // COMPILER1
4338 #if INCLUDE_JVMCI
4339 || !JVMCIUseFastLocking
4340 #endif
4341 ) {
4342 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) {
4343 // flag set to true on command line; warn the user that they
4344 // can't enable biased locking here
4345 warning("Biased Locking is not supported with locking debug flags"
4346 "; ignoring UseBiasedLocking flag." );
4347 }
4348 UseBiasedLocking = false;
4349 }
4350
4351 #ifdef CC_INTERP
4352 // Clear flags not supported on zero.
4353 FLAG_SET_DEFAULT(ProfileInterpreter, false);
4354 FLAG_SET_DEFAULT(UseBiasedLocking, false);
4355 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false));
4356 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false));
4357 #endif // CC_INTERP
4358
4359 #ifdef COMPILER2
4360 if (!EliminateLocks) {
4361 EliminateNestedLocks = false;
4362 }
4363 if (!Inline) {
4364 IncrementalInline = false;
4365 }
4366 #ifndef PRODUCT
4367 if (!IncrementalInline) {
4368 AlwaysIncrementalInline = false;
4369 }
4370 #endif
4371 if (!UseTypeSpeculation && FLAG_IS_DEFAULT(TypeProfileLevel)) {
4372 // nothing to use the profiling, turn if off
4373 FLAG_SET_DEFAULT(TypeProfileLevel, 0);
4374 }
4375 #endif
4376
4377 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) {
4378 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output");
4379 DebugNonSafepoints = true;
4380 }
4381
4382 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) {
4383 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used");
4384 }
4385
4386 #ifndef PRODUCT
4387 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) {
4388 if (use_vm_log()) {
4389 LogVMOutput = true;
4390 }
4391 }
4392 #endif // PRODUCT
4393
4394 if (PrintCommandLineFlags) {
4395 CommandLineFlags::printSetFlags(tty);
4396 }
4397
4398 // Apply CPU specific policy for the BiasedLocking
4399 if (UseBiasedLocking) {
4400 if (!VM_Version::use_biased_locking() &&
4401 !(FLAG_IS_CMDLINE(UseBiasedLocking))) {
4402 UseBiasedLocking = false;
4403 }
4404 }
4405 #ifdef COMPILER2
4406 if (!UseBiasedLocking || EmitSync != 0) {
4407 UseOptoBiasInlining = false;
4408 }
4409 #endif
4410
4411 return JNI_OK;
4412 }
4413
4414 jint Arguments::adjust_after_os() {
4415 if (UseNUMA) {
4416 if (UseParallelGC || UseParallelOldGC) {
4417 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) {
4418 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M);
4419 }
4420 }
4421 // UseNUMAInterleaving is set to ON for all collectors and
4422 // platforms when UseNUMA is set to ON. NUMA-aware collectors
4423 // such as the parallel collector for Linux and Solaris will
4424 // interleave old gen and survivor spaces on top of NUMA
4425 // allocation policy for the eden space.
4426 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on
4427 // all platforms and ParallelGC on Windows will interleave all
4428 // of the heap spaces across NUMA nodes.
4429 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) {
4430 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true);
4431 }
4432 }
4433 return JNI_OK;
4434 }
4435
4436 int Arguments::PropertyList_count(SystemProperty* pl) {
4437 int count = 0;
4438 while(pl != NULL) {
4439 count++;
4440 pl = pl->next();
4441 }
4442 return count;
4443 }
4444
4445 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) {
4446 assert(key != NULL, "just checking");
4447 SystemProperty* prop;
4448 for (prop = pl; prop != NULL; prop = prop->next()) {
4449 if (strcmp(key, prop->key()) == 0) return prop->value();
4450 }
4451 return NULL;
4452 }
4453
4454 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) {
4455 int count = 0;
4456 const char* ret_val = NULL;
4457
4458 while(pl != NULL) {
4459 if(count >= index) {
4460 ret_val = pl->key();
4461 break;
4462 }
4463 count++;
4464 pl = pl->next();
4465 }
4466
4467 return ret_val;
4468 }
4469
4470 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) {
4471 int count = 0;
4472 char* ret_val = NULL;
4473
4474 while(pl != NULL) {
4475 if(count >= index) {
4476 ret_val = pl->value();
4477 break;
4478 }
4479 count++;
4480 pl = pl->next();
4481 }
4482
4483 return ret_val;
4484 }
4485
4486 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) {
4487 SystemProperty* p = *plist;
4488 if (p == NULL) {
4489 *plist = new_p;
4490 } else {
4491 while (p->next() != NULL) {
4492 p = p->next();
4493 }
4494 p->set_next(new_p);
4495 }
4496 }
4497
4498 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v) {
4499 if (plist == NULL)
4500 return;
4501
4502 SystemProperty* new_p = new SystemProperty(k, v, true);
4503 PropertyList_add(plist, new_p);
4504 }
4505
4506 void Arguments::PropertyList_add(SystemProperty *element) {
4507 PropertyList_add(&_system_properties, element);
4508 }
4509
4510 // This add maintains unique property key in the list.
4511 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v, jboolean append) {
4512 if (plist == NULL)
4513 return;
4514
4515 // If property key exist then update with new value.
4516 SystemProperty* prop;
4517 for (prop = *plist; prop != NULL; prop = prop->next()) {
4518 if (strcmp(k, prop->key()) == 0) {
4519 if (append) {
4520 prop->append_value(v);
4521 } else {
4522 prop->set_value(v);
4523 }
4524 return;
4525 }
4526 }
4527
4528 PropertyList_add(plist, k, v);
4529 }
4530
4531 // Copies src into buf, replacing "%%" with "%" and "%p" with pid
4532 // Returns true if all of the source pointed by src has been copied over to
4533 // the destination buffer pointed by buf. Otherwise, returns false.
4534 // Notes:
4535 // 1. If the length (buflen) of the destination buffer excluding the
4536 // NULL terminator character is not long enough for holding the expanded
4537 // pid characters, it also returns false instead of returning the partially
4538 // expanded one.
4539 // 2. The passed in "buflen" should be large enough to hold the null terminator.
4540 bool Arguments::copy_expand_pid(const char* src, size_t srclen,
4541 char* buf, size_t buflen) {
4542 const char* p = src;
4543 char* b = buf;
4544 const char* src_end = &src[srclen];
4545 char* buf_end = &buf[buflen - 1];
4546
4547 while (p < src_end && b < buf_end) {
4548 if (*p == '%') {
4549 switch (*(++p)) {
4550 case '%': // "%%" ==> "%"
4551 *b++ = *p++;
4552 break;
4553 case 'p': { // "%p" ==> current process id
4554 // buf_end points to the character before the last character so
4555 // that we could write '\0' to the end of the buffer.
4556 size_t buf_sz = buf_end - b + 1;
4557 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id());
4558
4559 // if jio_snprintf fails or the buffer is not long enough to hold
4560 // the expanded pid, returns false.
4561 if (ret < 0 || ret >= (int)buf_sz) {
4562 return false;
4563 } else {
4564 b += ret;
4565 assert(*b == '\0', "fail in copy_expand_pid");
4566 if (p == src_end && b == buf_end + 1) {
4567 // reach the end of the buffer.
4568 return true;
4569 }
4570 }
4571 p++;
4572 break;
4573 }
4574 default :
4575 *b++ = '%';
4576 }
4577 } else {
4578 *b++ = *p++;
4579 }
4580 }
4581 *b = '\0';
4582 return (p == src_end); // return false if not all of the source was copied
4583 }