1 /*
2 * Copyright (c) 1997, 2015, 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 "compiler/compilerOracle.hpp"
32 #include "gc/shared/cardTableRS.hpp"
33 #include "gc/shared/genCollectedHeap.hpp"
34 #include "gc/shared/referenceProcessor.hpp"
35 #include "gc/shared/taskqueue.hpp"
36 #include "memory/allocation.inline.hpp"
37 #include "memory/universe.inline.hpp"
38 #include "oops/oop.inline.hpp"
39 #include "opto/safepointTable.hpp"
40 #include "prims/jvmtiExport.hpp"
41 #include "runtime/arguments.hpp"
42 #include "runtime/arguments_ext.hpp"
43 #include "runtime/commandLineFlagConstraintList.hpp"
44 #include "runtime/commandLineFlagRangeList.hpp"
45 #include "runtime/globals.hpp"
46 #include "runtime/globals_extension.hpp"
47 #include "runtime/java.hpp"
48 #include "runtime/os.hpp"
49 #include "runtime/vm_version.hpp"
50 #include "services/management.hpp"
51 #include "services/memTracker.hpp"
52 #include "utilities/defaultStream.hpp"
53 #include "utilities/macros.hpp"
54 #include "utilities/stringUtils.hpp"
55 #if INCLUDE_ALL_GCS
56 #include "gc/cms/compactibleFreeListSpace.hpp"
57 #include "gc/g1/g1CollectedHeap.inline.hpp"
58 #include "gc/parallel/parallelScavengeHeap.hpp"
59 #endif // INCLUDE_ALL_GCS
60
61 // Note: This is a special bug reporting site for the JVM
62 #define DEFAULT_VENDOR_URL_BUG "http://bugreport.java.com/bugreport/crash.jsp"
63 #define DEFAULT_JAVA_LAUNCHER "generic"
64
65 #define UNSUPPORTED_GC_OPTION(gc) \
66 do { \
67 if (gc) { \
68 if (FLAG_IS_CMDLINE(gc)) { \
69 warning(#gc " is not supported in this VM. Using Serial GC."); \
70 } \
71 FLAG_SET_DEFAULT(gc, false); \
72 } \
73 } while(0)
74
75 char** Arguments::_jvm_flags_array = NULL;
76 int Arguments::_num_jvm_flags = 0;
77 char** Arguments::_jvm_args_array = NULL;
78 int Arguments::_num_jvm_args = 0;
79 char* Arguments::_java_command = NULL;
80 SystemProperty* Arguments::_system_properties = NULL;
81 const char* Arguments::_gc_log_filename = NULL;
82 bool Arguments::_has_profile = false;
83 size_t Arguments::_conservative_max_heap_alignment = 0;
84 size_t Arguments::_min_heap_size = 0;
85 uintx Arguments::_min_heap_free_ratio = 0;
86 uintx Arguments::_max_heap_free_ratio = 0;
87 Arguments::Mode Arguments::_mode = _mixed;
88 bool Arguments::_java_compiler = false;
89 bool Arguments::_xdebug_mode = false;
90 const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG;
91 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER;
92 int Arguments::_sun_java_launcher_pid = -1;
93 bool Arguments::_sun_java_launcher_is_altjvm = false;
94
95 // These parameters are reset in method parse_vm_init_args()
96 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
97 bool Arguments::_UseOnStackReplacement = UseOnStackReplacement;
98 bool Arguments::_BackgroundCompilation = BackgroundCompilation;
99 bool Arguments::_ClipInlining = ClipInlining;
100 intx Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
101 intx Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
102
103 char* Arguments::SharedArchivePath = NULL;
104
105 AgentLibraryList Arguments::_libraryList;
106 AgentLibraryList Arguments::_agentList;
107
108 abort_hook_t Arguments::_abort_hook = NULL;
109 exit_hook_t Arguments::_exit_hook = NULL;
110 vfprintf_hook_t Arguments::_vfprintf_hook = NULL;
111
112
113 SystemProperty *Arguments::_sun_boot_library_path = NULL;
114 SystemProperty *Arguments::_java_library_path = NULL;
115 SystemProperty *Arguments::_java_home = NULL;
116 SystemProperty *Arguments::_java_class_path = NULL;
117 SystemProperty *Arguments::_sun_boot_class_path = NULL;
118
119 char* Arguments::_ext_dirs = NULL;
120
121 // Check if head of 'option' matches 'name', and sets 'tail' to the remaining
122 // part of the option string.
123 static bool match_option(const JavaVMOption *option, const char* name,
124 const char** tail) {
125 int len = (int)strlen(name);
126 if (strncmp(option->optionString, name, len) == 0) {
127 *tail = option->optionString + len;
128 return true;
129 } else {
130 return false;
131 }
132 }
133
134 // Check if 'option' matches 'name'. No "tail" is allowed.
135 static bool match_option(const JavaVMOption *option, const char* name) {
136 const char* tail = NULL;
137 bool result = match_option(option, name, &tail);
138 if (tail != NULL && *tail == '\0') {
139 return result;
140 } else {
141 return false;
142 }
143 }
144
145 // Return true if any of the strings in null-terminated array 'names' matches.
146 // If tail_allowed is true, then the tail must begin with a colon; otherwise,
147 // the option must match exactly.
148 static bool match_option(const JavaVMOption* option, const char** names, const char** tail,
149 bool tail_allowed) {
150 for (/* empty */; *names != NULL; ++names) {
151 if (match_option(option, *names, tail)) {
152 if (**tail == '\0' || tail_allowed && **tail == ':') {
153 return true;
154 }
155 }
156 }
157 return false;
158 }
159
160 static void logOption(const char* opt) {
161 if (PrintVMOptions) {
162 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt);
163 }
164 }
165
166 // Process java launcher properties.
167 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) {
168 // See if sun.java.launcher, sun.java.launcher.is_altjvm or
169 // sun.java.launcher.pid is defined.
170 // Must do this before setting up other system properties,
171 // as some of them may depend on launcher type.
172 for (int index = 0; index < args->nOptions; index++) {
173 const JavaVMOption* option = args->options + index;
174 const char* tail;
175
176 if (match_option(option, "-Dsun.java.launcher=", &tail)) {
177 process_java_launcher_argument(tail, option->extraInfo);
178 continue;
179 }
180 if (match_option(option, "-Dsun.java.launcher.is_altjvm=", &tail)) {
181 if (strcmp(tail, "true") == 0) {
182 _sun_java_launcher_is_altjvm = true;
183 }
184 continue;
185 }
186 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) {
187 _sun_java_launcher_pid = atoi(tail);
188 continue;
189 }
190 }
191 }
192
193 // Initialize system properties key and value.
194 void Arguments::init_system_properties() {
195 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name",
196 "Java Virtual Machine Specification", false));
197 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false));
198 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false));
199 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true));
200
201 // Following are JVMTI agent writable properties.
202 // Properties values are set to NULL and they are
203 // os specific they are initialized in os::init_system_properties_values().
204 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true);
205 _java_library_path = new SystemProperty("java.library.path", NULL, true);
206 _java_home = new SystemProperty("java.home", NULL, true);
207 _sun_boot_class_path = new SystemProperty("sun.boot.class.path", NULL, true);
208
209 _java_class_path = new SystemProperty("java.class.path", "", true);
210
211 // Add to System Property list.
212 PropertyList_add(&_system_properties, _sun_boot_library_path);
213 PropertyList_add(&_system_properties, _java_library_path);
214 PropertyList_add(&_system_properties, _java_home);
215 PropertyList_add(&_system_properties, _java_class_path);
216 PropertyList_add(&_system_properties, _sun_boot_class_path);
217
218 // Set OS specific system properties values
219 os::init_system_properties_values();
220 }
221
222 // Update/Initialize System properties after JDK version number is known
223 void Arguments::init_version_specific_system_properties() {
224 enum { bufsz = 16 };
225 char buffer[bufsz];
226 const char* spec_vendor = "Sun Microsystems Inc.";
227 uint32_t spec_version = 0;
228
229 spec_vendor = "Oracle Corporation";
230 spec_version = JDK_Version::current().major_version();
231 jio_snprintf(buffer, bufsz, "1." UINT32_FORMAT, spec_version);
232
233 PropertyList_add(&_system_properties,
234 new SystemProperty("java.vm.specification.vendor", spec_vendor, false));
235 PropertyList_add(&_system_properties,
236 new SystemProperty("java.vm.specification.version", buffer, false));
237 PropertyList_add(&_system_properties,
238 new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false));
239 }
240
241 /**
242 * Provide a slightly more user-friendly way of eliminating -XX flags.
243 * When a flag is eliminated, it can be added to this list in order to
244 * continue accepting this flag on the command-line, while issuing a warning
245 * and ignoring the value. Once the JDK version reaches the 'accept_until'
246 * limit, we flatly refuse to admit the existence of the flag. This allows
247 * a flag to die correctly over JDK releases using HSX.
248 * But now that HSX is no longer supported only options with a future
249 * accept_until value need to be listed, and the list can be pruned
250 * on each major release.
251 */
252 typedef struct {
253 const char* name;
254 JDK_Version obsoleted_in; // when the flag went away
255 JDK_Version accept_until; // which version to start denying the existence
256 } ObsoleteFlag;
257
258 static ObsoleteFlag obsolete_jvm_flags[] = {
259 { "UseOldInlining", JDK_Version::jdk(9), JDK_Version::jdk(10) },
260 { "SafepointPollOffset", JDK_Version::jdk(9), JDK_Version::jdk(10) },
261 { "UseBoundThreads", JDK_Version::jdk(9), JDK_Version::jdk(10) },
262 { "DefaultThreadPriority", JDK_Version::jdk(9), JDK_Version::jdk(10) },
263 { "NoYieldsInMicrolock", JDK_Version::jdk(9), JDK_Version::jdk(10) },
264 { "BackEdgeThreshold", JDK_Version::jdk(9), JDK_Version::jdk(10) },
265 { "UseNewReflection", JDK_Version::jdk(9), JDK_Version::jdk(10) },
266 { "ReflectionWrapResolutionErrors",JDK_Version::jdk(9), JDK_Version::jdk(10) },
267 { "VerifyReflectionBytecodes", JDK_Version::jdk(9), JDK_Version::jdk(10) },
268 { "AutoShutdownNMT", JDK_Version::jdk(9), JDK_Version::jdk(10) },
269 { "NmethodSweepFraction", JDK_Version::jdk(9), JDK_Version::jdk(10) },
270 { "NmethodSweepCheckInterval", JDK_Version::jdk(9), JDK_Version::jdk(10) },
271 { "CodeCacheMinimumFreeSpace", JDK_Version::jdk(9), JDK_Version::jdk(10) },
272 #ifndef ZERO
273 { "UseFastAccessorMethods", JDK_Version::jdk(9), JDK_Version::jdk(10) },
274 { "UseFastEmptyMethods", JDK_Version::jdk(9), JDK_Version::jdk(10) },
275 #endif // ZERO
276 { "UseCompilerSafepoints", JDK_Version::jdk(9), JDK_Version::jdk(10) },
277 { "AdaptiveSizePausePolicy", JDK_Version::jdk(9), JDK_Version::jdk(10) },
278 { "ParallelGCRetainPLAB", JDK_Version::jdk(9), JDK_Version::jdk(10) },
279 { "ThreadSafetyMargin", JDK_Version::jdk(9), JDK_Version::jdk(10) },
280 { "LazyBootClassLoader", JDK_Version::jdk(9), JDK_Version::jdk(10) },
281 { "StarvationMonitorInterval", JDK_Version::jdk(9), JDK_Version::jdk(10) },
282 { "PreInflateSpin", JDK_Version::jdk(9), JDK_Version::jdk(10) },
283 { NULL, JDK_Version(0), JDK_Version(0) }
284 };
285
286 // Returns true if the flag is obsolete and fits into the range specified
287 // for being ignored. In the case that the flag is ignored, the 'version'
288 // value is filled in with the version number when the flag became
289 // obsolete so that that value can be displayed to the user.
290 bool Arguments::is_newly_obsolete(const char *s, JDK_Version* version) {
291 int i = 0;
292 assert(version != NULL, "Must provide a version buffer");
293 while (obsolete_jvm_flags[i].name != NULL) {
294 const ObsoleteFlag& flag_status = obsolete_jvm_flags[i];
295 // <flag>=xxx form
296 // [-|+]<flag> form
297 size_t len = strlen(flag_status.name);
298 if ((strncmp(flag_status.name, s, len) == 0) &&
299 (strlen(s) == len)){
300 if (JDK_Version::current().compare(flag_status.accept_until) == -1) {
301 *version = flag_status.obsoleted_in;
302 return true;
303 }
304 }
305 i++;
306 }
307 return false;
308 }
309
310 // Constructs the system class path (aka boot class path) from the following
311 // components, in order:
312 //
313 // prefix // from -Xbootclasspath/p:...
314 // base // from os::get_system_properties() or -Xbootclasspath=
315 // suffix // from -Xbootclasspath/a:...
316 //
317 // This could be AllStatic, but it isn't needed after argument processing is
318 // complete.
319 class SysClassPath: public StackObj {
320 public:
321 SysClassPath(const char* base);
322 ~SysClassPath();
323
324 inline void set_base(const char* base);
325 inline void add_prefix(const char* prefix);
326 inline void add_suffix_to_prefix(const char* suffix);
327 inline void add_suffix(const char* suffix);
328 inline void reset_path(const char* base);
329
330 inline const char* get_base() const { return _items[_scp_base]; }
331 inline const char* get_prefix() const { return _items[_scp_prefix]; }
332 inline const char* get_suffix() const { return _items[_scp_suffix]; }
333
334 // Combine all the components into a single c-heap-allocated string; caller
335 // must free the string if/when no longer needed.
336 char* combined_path();
337
338 private:
339 // Utility routines.
340 static char* add_to_path(const char* path, const char* str, bool prepend);
341 static char* add_jars_to_path(char* path, const char* directory);
342
343 inline void reset_item_at(int index);
344
345 // Array indices for the items that make up the sysclasspath. All except the
346 // base are allocated in the C heap and freed by this class.
347 enum {
348 _scp_prefix, // from -Xbootclasspath/p:...
349 _scp_base, // the default sysclasspath
350 _scp_suffix, // from -Xbootclasspath/a:...
351 _scp_nitems // the number of items, must be last.
352 };
353
354 const char* _items[_scp_nitems];
355 };
356
357 SysClassPath::SysClassPath(const char* base) {
358 memset(_items, 0, sizeof(_items));
359 _items[_scp_base] = base;
360 }
361
362 SysClassPath::~SysClassPath() {
363 // Free everything except the base.
364 for (int i = 0; i < _scp_nitems; ++i) {
365 if (i != _scp_base) reset_item_at(i);
366 }
367 }
368
369 inline void SysClassPath::set_base(const char* base) {
370 _items[_scp_base] = base;
371 }
372
373 inline void SysClassPath::add_prefix(const char* prefix) {
374 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], prefix, true);
375 }
376
377 inline void SysClassPath::add_suffix_to_prefix(const char* suffix) {
378 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], suffix, false);
379 }
380
381 inline void SysClassPath::add_suffix(const char* suffix) {
382 _items[_scp_suffix] = add_to_path(_items[_scp_suffix], suffix, false);
383 }
384
385 inline void SysClassPath::reset_item_at(int index) {
386 assert(index < _scp_nitems && index != _scp_base, "just checking");
387 if (_items[index] != NULL) {
388 FREE_C_HEAP_ARRAY(char, _items[index]);
389 _items[index] = NULL;
390 }
391 }
392
393 inline void SysClassPath::reset_path(const char* base) {
394 // Clear the prefix and suffix.
395 reset_item_at(_scp_prefix);
396 reset_item_at(_scp_suffix);
397 set_base(base);
398 }
399
400 //------------------------------------------------------------------------------
401
402
403 // Combine the bootclasspath elements, some of which may be null, into a single
404 // c-heap-allocated string.
405 char* SysClassPath::combined_path() {
406 assert(_items[_scp_base] != NULL, "empty default sysclasspath");
407
408 size_t lengths[_scp_nitems];
409 size_t total_len = 0;
410
411 const char separator = *os::path_separator();
412
413 // Get the lengths.
414 int i;
415 for (i = 0; i < _scp_nitems; ++i) {
416 if (_items[i] != NULL) {
417 lengths[i] = strlen(_items[i]);
418 // Include space for the separator char (or a NULL for the last item).
419 total_len += lengths[i] + 1;
420 }
421 }
422 assert(total_len > 0, "empty sysclasspath not allowed");
423
424 // Copy the _items to a single string.
425 char* cp = NEW_C_HEAP_ARRAY(char, total_len, mtInternal);
426 char* cp_tmp = cp;
427 for (i = 0; i < _scp_nitems; ++i) {
428 if (_items[i] != NULL) {
429 memcpy(cp_tmp, _items[i], lengths[i]);
430 cp_tmp += lengths[i];
431 *cp_tmp++ = separator;
432 }
433 }
434 *--cp_tmp = '\0'; // Replace the extra separator.
435 return cp;
436 }
437
438 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null.
439 char*
440 SysClassPath::add_to_path(const char* path, const char* str, bool prepend) {
441 char *cp;
442
443 assert(str != NULL, "just checking");
444 if (path == NULL) {
445 size_t len = strlen(str) + 1;
446 cp = NEW_C_HEAP_ARRAY(char, len, mtInternal);
447 memcpy(cp, str, len); // copy the trailing null
448 } else {
449 const char separator = *os::path_separator();
450 size_t old_len = strlen(path);
451 size_t str_len = strlen(str);
452 size_t len = old_len + str_len + 2;
453
454 if (prepend) {
455 cp = NEW_C_HEAP_ARRAY(char, len, mtInternal);
456 char* cp_tmp = cp;
457 memcpy(cp_tmp, str, str_len);
458 cp_tmp += str_len;
459 *cp_tmp = separator;
460 memcpy(++cp_tmp, path, old_len + 1); // copy the trailing null
461 FREE_C_HEAP_ARRAY(char, path);
462 } else {
463 cp = REALLOC_C_HEAP_ARRAY(char, path, len, mtInternal);
464 char* cp_tmp = cp + old_len;
465 *cp_tmp = separator;
466 memcpy(++cp_tmp, str, str_len + 1); // copy the trailing null
467 }
468 }
469 return cp;
470 }
471
472 // Scan the directory and append any jar or zip files found to path.
473 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null.
474 char* SysClassPath::add_jars_to_path(char* path, const char* directory) {
475 DIR* dir = os::opendir(directory);
476 if (dir == NULL) return path;
477
478 char dir_sep[2] = { '\0', '\0' };
479 size_t directory_len = strlen(directory);
480 const char fileSep = *os::file_separator();
481 if (directory[directory_len - 1] != fileSep) dir_sep[0] = fileSep;
482
483 /* Scan the directory for jars/zips, appending them to path. */
484 struct dirent *entry;
485 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtInternal);
486 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL) {
487 const char* name = entry->d_name;
488 const char* ext = name + strlen(name) - 4;
489 bool isJarOrZip = ext > name &&
490 (os::file_name_strcmp(ext, ".jar") == 0 ||
491 os::file_name_strcmp(ext, ".zip") == 0);
492 if (isJarOrZip) {
493 char* jarpath = NEW_C_HEAP_ARRAY(char, directory_len + 2 + strlen(name), mtInternal);
494 sprintf(jarpath, "%s%s%s", directory, dir_sep, name);
495 path = add_to_path(path, jarpath, false);
496 FREE_C_HEAP_ARRAY(char, jarpath);
497 }
498 }
499 FREE_C_HEAP_ARRAY(char, dbuf);
500 os::closedir(dir);
501 return path;
502 }
503
504 // Parses a memory size specification string.
505 static bool atomull(const char *s, julong* result) {
506 julong n = 0;
507 int args_read = 0;
508 bool is_hex = false;
509 // Skip leading 0[xX] for hexadecimal
510 if (*s =='0' && (*(s+1) == 'x' || *(s+1) == 'X')) {
511 s += 2;
512 is_hex = true;
513 args_read = sscanf(s, JULONG_FORMAT_X, &n);
514 } else {
515 args_read = sscanf(s, JULONG_FORMAT, &n);
516 }
517 if (args_read != 1) {
518 return false;
519 }
520 while (*s != '\0' && (isdigit(*s) || (is_hex && isxdigit(*s)))) {
521 s++;
522 }
523 // 4705540: illegal if more characters are found after the first non-digit
524 if (strlen(s) > 1) {
525 return false;
526 }
527 switch (*s) {
528 case 'T': case 't':
529 *result = n * G * K;
530 // Check for overflow.
531 if (*result/((julong)G * K) != n) return false;
532 return true;
533 case 'G': case 'g':
534 *result = n * G;
535 if (*result/G != n) return false;
536 return true;
537 case 'M': case 'm':
538 *result = n * M;
539 if (*result/M != n) return false;
540 return true;
541 case 'K': case 'k':
542 *result = n * K;
543 if (*result/K != n) return false;
544 return true;
545 case '\0':
546 *result = n;
547 return true;
548 default:
549 return false;
550 }
551 }
552
553 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size) {
554 if (size < min_size) return arg_too_small;
555 // Check that size will fit in a size_t (only relevant on 32-bit)
556 if (size > max_uintx) return arg_too_big;
557 return arg_in_range;
558 }
559
560 // Describe an argument out of range error
561 void Arguments::describe_range_error(ArgsRange errcode) {
562 switch(errcode) {
563 case arg_too_big:
564 jio_fprintf(defaultStream::error_stream(),
565 "The specified size exceeds the maximum "
566 "representable size.\n");
567 break;
568 case arg_too_small:
569 case arg_unreadable:
570 case arg_in_range:
571 // do nothing for now
572 break;
573 default:
574 ShouldNotReachHere();
575 }
576 }
577
578 static bool set_bool_flag(char* name, bool value, Flag::Flags origin) {
579 if (CommandLineFlags::boolAtPut(name, &value, origin) == Flag::SUCCESS) {
580 return true;
581 } else {
582 return false;
583 }
584 }
585
586 static bool set_fp_numeric_flag(char* name, char* value, Flag::Flags origin) {
587 double v;
588 if (sscanf(value, "%lf", &v) != 1) {
589 return false;
590 }
591
592 if (CommandLineFlags::doubleAtPut(name, &v, origin) == Flag::SUCCESS) {
593 return true;
594 }
595 return false;
596 }
597
598 static bool set_numeric_flag(char* name, char* value, Flag::Flags origin) {
599 julong v;
600 int int_v;
601 intx intx_v;
602 bool is_neg = false;
603 // Check the sign first since atomull() parses only unsigned values.
604 if (*value == '-') {
605 if ((CommandLineFlags::intxAt(name, &intx_v) != Flag::SUCCESS) && (CommandLineFlags::intAt(name, &int_v) != Flag::SUCCESS)) {
606 return false;
607 }
608 value++;
609 is_neg = true;
610 }
611 if (!atomull(value, &v)) {
612 return false;
613 }
614 int_v = (int) v;
615 if (is_neg) {
616 int_v = -int_v;
617 }
618 if (CommandLineFlags::intAtPut(name, &int_v, origin) == Flag::SUCCESS) {
619 return true;
620 }
621 uint uint_v = (uint) v;
622 if (!is_neg && CommandLineFlags::uintAtPut(name, &uint_v, origin) == Flag::SUCCESS) {
623 return true;
624 }
625 intx_v = (intx) v;
626 if (is_neg) {
627 intx_v = -intx_v;
628 }
629 if (CommandLineFlags::intxAtPut(name, &intx_v, origin) == Flag::SUCCESS) {
630 return true;
631 }
632 uintx uintx_v = (uintx) v;
633 if (!is_neg && (CommandLineFlags::uintxAtPut(name, &uintx_v, origin) == Flag::SUCCESS)) {
634 return true;
635 }
636 uint64_t uint64_t_v = (uint64_t) v;
637 if (!is_neg && (CommandLineFlags::uint64_tAtPut(name, &uint64_t_v, origin) == Flag::SUCCESS)) {
638 return true;
639 }
640 size_t size_t_v = (size_t) v;
641 if (!is_neg && (CommandLineFlags::size_tAtPut(name, &size_t_v, origin) == Flag::SUCCESS)) {
642 return true;
643 }
644 return false;
645 }
646
647 static bool set_string_flag(char* name, const char* value, Flag::Flags origin) {
648 if (CommandLineFlags::ccstrAtPut(name, &value, origin) != Flag::SUCCESS) return false;
649 // Contract: CommandLineFlags always returns a pointer that needs freeing.
650 FREE_C_HEAP_ARRAY(char, value);
651 return true;
652 }
653
654 static bool append_to_string_flag(char* name, const char* new_value, Flag::Flags origin) {
655 const char* old_value = "";
656 if (CommandLineFlags::ccstrAt(name, &old_value) != Flag::SUCCESS) return false;
657 size_t old_len = old_value != NULL ? strlen(old_value) : 0;
658 size_t new_len = strlen(new_value);
659 const char* value;
660 char* free_this_too = NULL;
661 if (old_len == 0) {
662 value = new_value;
663 } else if (new_len == 0) {
664 value = old_value;
665 } else {
666 char* buf = NEW_C_HEAP_ARRAY(char, old_len + 1 + new_len + 1, mtInternal);
667 // each new setting adds another LINE to the switch:
668 sprintf(buf, "%s\n%s", old_value, new_value);
669 value = buf;
670 free_this_too = buf;
671 }
672 (void) CommandLineFlags::ccstrAtPut(name, &value, origin);
673 // CommandLineFlags always returns a pointer that needs freeing.
674 FREE_C_HEAP_ARRAY(char, value);
675 if (free_this_too != NULL) {
676 // CommandLineFlags made its own copy, so I must delete my own temp. buffer.
677 FREE_C_HEAP_ARRAY(char, free_this_too);
678 }
679 return true;
680 }
681
682 bool Arguments::parse_argument(const char* arg, Flag::Flags origin) {
683
684 // range of acceptable characters spelled out for portability reasons
685 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]"
686 #define BUFLEN 255
687 char name[BUFLEN+1];
688 char dummy;
689
690 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
691 return set_bool_flag(name, false, origin);
692 }
693 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
694 return set_bool_flag(name, true, origin);
695 }
696
697 char punct;
698 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') {
699 const char* value = strchr(arg, '=') + 1;
700 Flag* flag = Flag::find_flag(name, strlen(name));
701 if (flag != NULL && flag->is_ccstr()) {
702 if (flag->ccstr_accumulates()) {
703 return append_to_string_flag(name, value, origin);
704 } else {
705 if (value[0] == '\0') {
706 value = NULL;
707 }
708 return set_string_flag(name, value, origin);
709 }
710 }
711 }
712
713 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') {
714 const char* value = strchr(arg, '=') + 1;
715 // -XX:Foo:=xxx will reset the string flag to the given value.
716 if (value[0] == '\0') {
717 value = NULL;
718 }
719 return set_string_flag(name, value, origin);
720 }
721
722 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.]"
723 #define SIGNED_NUMBER_RANGE "[-0123456789]"
724 #define NUMBER_RANGE "[0123456789]"
725 char value[BUFLEN + 1];
726 char value2[BUFLEN + 1];
727 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) {
728 // Looks like a floating-point number -- try again with more lenient format string
729 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) {
730 return set_fp_numeric_flag(name, value, origin);
731 }
732 }
733
734 #define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]"
735 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) {
736 return set_numeric_flag(name, value, origin);
737 }
738
739 return false;
740 }
741
742 void Arguments::add_string(char*** bldarray, int* count, const char* arg) {
743 assert(bldarray != NULL, "illegal argument");
744
745 if (arg == NULL) {
746 return;
747 }
748
749 int new_count = *count + 1;
750
751 // expand the array and add arg to the last element
752 if (*bldarray == NULL) {
753 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtInternal);
754 } else {
755 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtInternal);
756 }
757 (*bldarray)[*count] = os::strdup_check_oom(arg);
758 *count = new_count;
759 }
760
761 void Arguments::build_jvm_args(const char* arg) {
762 add_string(&_jvm_args_array, &_num_jvm_args, arg);
763 }
764
765 void Arguments::build_jvm_flags(const char* arg) {
766 add_string(&_jvm_flags_array, &_num_jvm_flags, arg);
767 }
768
769 // utility function to return a string that concatenates all
770 // strings in a given char** array
771 const char* Arguments::build_resource_string(char** args, int count) {
772 if (args == NULL || count == 0) {
773 return NULL;
774 }
775 size_t length = strlen(args[0]) + 1; // add 1 for the null terminator
776 for (int i = 1; i < count; i++) {
777 length += strlen(args[i]) + 1; // add 1 for a space
778 }
779 char* s = NEW_RESOURCE_ARRAY(char, length);
780 strcpy(s, args[0]);
781 for (int j = 1; j < count; j++) {
782 strcat(s, " ");
783 strcat(s, args[j]);
784 }
785 return (const char*) s;
786 }
787
788 void Arguments::print_on(outputStream* st) {
789 st->print_cr("VM Arguments:");
790 if (num_jvm_flags() > 0) {
791 st->print("jvm_flags: "); print_jvm_flags_on(st);
792 st->cr();
793 }
794 if (num_jvm_args() > 0) {
795 st->print("jvm_args: "); print_jvm_args_on(st);
796 st->cr();
797 }
798 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>");
799 if (_java_class_path != NULL) {
800 char* path = _java_class_path->value();
801 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path );
802 }
803 st->print_cr("Launcher Type: %s", _sun_java_launcher);
804 }
805
806 void Arguments::print_summary_on(outputStream* st) {
807 // Print the command line. Environment variables that are helpful for
808 // reproducing the problem are written later in the hs_err file.
809 // flags are from setting file
810 if (num_jvm_flags() > 0) {
811 st->print_raw("Settings File: ");
812 print_jvm_flags_on(st);
813 st->cr();
814 }
815 // args are the command line and environment variable arguments.
816 st->print_raw("Command Line: ");
817 if (num_jvm_args() > 0) {
818 print_jvm_args_on(st);
819 }
820 // this is the classfile and any arguments to the java program
821 if (java_command() != NULL) {
822 st->print("%s", java_command());
823 }
824 st->cr();
825 }
826
827 void Arguments::print_jvm_flags_on(outputStream* st) {
828 if (_num_jvm_flags > 0) {
829 for (int i=0; i < _num_jvm_flags; i++) {
830 st->print("%s ", _jvm_flags_array[i]);
831 }
832 }
833 }
834
835 void Arguments::print_jvm_args_on(outputStream* st) {
836 if (_num_jvm_args > 0) {
837 for (int i=0; i < _num_jvm_args; i++) {
838 st->print("%s ", _jvm_args_array[i]);
839 }
840 }
841 }
842
843 bool Arguments::process_argument(const char* arg,
844 jboolean ignore_unrecognized, Flag::Flags origin) {
845
846 JDK_Version since = JDK_Version();
847
848 if (parse_argument(arg, origin) || ignore_unrecognized) {
849 return true;
850 }
851
852 // Determine if the flag has '+', '-', or '=' characters.
853 bool has_plus_minus = (*arg == '+' || *arg == '-');
854 const char* const argname = has_plus_minus ? arg + 1 : arg;
855
856 size_t arg_len;
857 const char* equal_sign = strchr(argname, '=');
858 if (equal_sign == NULL) {
859 arg_len = strlen(argname);
860 } else {
861 arg_len = equal_sign - argname;
862 }
863
864 // Only make the obsolete check for valid arguments.
865 if (arg_len <= BUFLEN) {
866 // Construct a string which consists only of the argument name without '+', '-', or '='.
867 char stripped_argname[BUFLEN+1];
868 strncpy(stripped_argname, argname, arg_len);
869 stripped_argname[arg_len] = '\0'; // strncpy may not null terminate.
870
871 if (is_newly_obsolete(stripped_argname, &since)) {
872 char version[256];
873 since.to_string(version, sizeof(version));
874 warning("ignoring option %s; support was removed in %s", stripped_argname, version);
875 return true;
876 }
877 }
878
879 // For locked flags, report a custom error message if available.
880 // Otherwise, report the standard unrecognized VM option.
881 Flag* found_flag = Flag::find_flag((const char*)argname, arg_len, true, true);
882 if (found_flag != NULL) {
883 char locked_message_buf[BUFLEN];
884 found_flag->get_locked_message(locked_message_buf, BUFLEN);
885 if (strlen(locked_message_buf) == 0) {
886 if (found_flag->is_bool() && !has_plus_minus) {
887 jio_fprintf(defaultStream::error_stream(),
888 "Missing +/- setting for VM option '%s'\n", argname);
889 } else if (!found_flag->is_bool() && has_plus_minus) {
890 jio_fprintf(defaultStream::error_stream(),
891 "Unexpected +/- setting in VM option '%s'\n", argname);
892 } else {
893 jio_fprintf(defaultStream::error_stream(),
894 "Improperly specified VM option '%s'\n", argname);
895 }
896 } else {
897 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf);
898 }
899 } else {
900 jio_fprintf(defaultStream::error_stream(),
901 "Unrecognized VM option '%s'\n", argname);
902 Flag* fuzzy_matched = Flag::fuzzy_match((const char*)argname, arg_len, true);
903 if (fuzzy_matched != NULL) {
904 jio_fprintf(defaultStream::error_stream(),
905 "Did you mean '%s%s%s'? ",
906 (fuzzy_matched->is_bool()) ? "(+/-)" : "",
907 fuzzy_matched->_name,
908 (fuzzy_matched->is_bool()) ? "" : "=<value>");
909 }
910 }
911
912 // allow for commandline "commenting out" options like -XX:#+Verbose
913 return arg[0] == '#';
914 }
915
916 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) {
917 FILE* stream = fopen(file_name, "rb");
918 if (stream == NULL) {
919 if (should_exist) {
920 jio_fprintf(defaultStream::error_stream(),
921 "Could not open settings file %s\n", file_name);
922 return false;
923 } else {
924 return true;
925 }
926 }
927
928 char token[1024];
929 int pos = 0;
930
931 bool in_white_space = true;
932 bool in_comment = false;
933 bool in_quote = false;
934 char quote_c = 0;
935 bool result = true;
936
937 int c = getc(stream);
938 while(c != EOF && pos < (int)(sizeof(token)-1)) {
939 if (in_white_space) {
940 if (in_comment) {
941 if (c == '\n') in_comment = false;
942 } else {
943 if (c == '#') in_comment = true;
944 else if (!isspace(c)) {
945 in_white_space = false;
946 token[pos++] = c;
947 }
948 }
949 } else {
950 if (c == '\n' || (!in_quote && isspace(c))) {
951 // token ends at newline, or at unquoted whitespace
952 // this allows a way to include spaces in string-valued options
953 token[pos] = '\0';
954 logOption(token);
955 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
956 build_jvm_flags(token);
957 pos = 0;
958 in_white_space = true;
959 in_quote = false;
960 } else if (!in_quote && (c == '\'' || c == '"')) {
961 in_quote = true;
962 quote_c = c;
963 } else if (in_quote && (c == quote_c)) {
964 in_quote = false;
965 } else {
966 token[pos++] = c;
967 }
968 }
969 c = getc(stream);
970 }
971 if (pos > 0) {
972 token[pos] = '\0';
973 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
974 build_jvm_flags(token);
975 }
976 fclose(stream);
977 return result;
978 }
979
980 //=============================================================================================================
981 // Parsing of properties (-D)
982
983 const char* Arguments::get_property(const char* key) {
984 return PropertyList_get_value(system_properties(), key);
985 }
986
987 bool Arguments::add_property(const char* prop) {
988 const char* eq = strchr(prop, '=');
989 char* key;
990 // ns must be static--its address may be stored in a SystemProperty object.
991 const static char ns[1] = {0};
992 char* value = (char *)ns;
993
994 size_t key_len = (eq == NULL) ? strlen(prop) : (eq - prop);
995 key = AllocateHeap(key_len + 1, mtInternal);
996 strncpy(key, prop, key_len);
997 key[key_len] = '\0';
998
999 if (eq != NULL) {
1000 size_t value_len = strlen(prop) - key_len - 1;
1001 value = AllocateHeap(value_len + 1, mtInternal);
1002 strncpy(value, &prop[key_len + 1], value_len + 1);
1003 }
1004
1005 if (strcmp(key, "java.compiler") == 0) {
1006 process_java_compiler_argument(value);
1007 FreeHeap(key);
1008 if (eq != NULL) {
1009 FreeHeap(value);
1010 }
1011 return true;
1012 } else if (strcmp(key, "sun.java.command") == 0) {
1013 _java_command = value;
1014
1015 // Record value in Arguments, but let it get passed to Java.
1016 } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 ||
1017 strcmp(key, "sun.java.launcher.pid") == 0) {
1018 // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are
1019 // private and are processed in process_sun_java_launcher_properties();
1020 // the sun.java.launcher property is passed on to the java application
1021 FreeHeap(key);
1022 if (eq != NULL) {
1023 FreeHeap(value);
1024 }
1025 return true;
1026 } else if (strcmp(key, "java.vendor.url.bug") == 0) {
1027 // save it in _java_vendor_url_bug, so JVM fatal error handler can access
1028 // its value without going through the property list or making a Java call.
1029 _java_vendor_url_bug = value;
1030 } else if (strcmp(key, "sun.boot.library.path") == 0) {
1031 PropertyList_unique_add(&_system_properties, key, value, true);
1032 return true;
1033 }
1034 // Create new property and add at the end of the list
1035 PropertyList_unique_add(&_system_properties, key, value);
1036 return true;
1037 }
1038
1039 //===========================================================================================================
1040 // Setting int/mixed/comp mode flags
1041
1042 void Arguments::set_mode_flags(Mode mode) {
1043 // Set up default values for all flags.
1044 // If you add a flag to any of the branches below,
1045 // add a default value for it here.
1046 set_java_compiler(false);
1047 _mode = mode;
1048
1049 // Ensure Agent_OnLoad has the correct initial values.
1050 // This may not be the final mode; mode may change later in onload phase.
1051 PropertyList_unique_add(&_system_properties, "java.vm.info",
1052 (char*)VM_Version::vm_info_string(), false);
1053
1054 UseInterpreter = true;
1055 UseCompiler = true;
1056 UseLoopCounter = true;
1057
1058 // Default values may be platform/compiler dependent -
1059 // use the saved values
1060 ClipInlining = Arguments::_ClipInlining;
1061 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods;
1062 UseOnStackReplacement = Arguments::_UseOnStackReplacement;
1063 BackgroundCompilation = Arguments::_BackgroundCompilation;
1064 if (TieredCompilation) {
1065 if (FLAG_IS_DEFAULT(Tier3InvokeNotifyFreqLog)) {
1066 Tier3InvokeNotifyFreqLog = Arguments::_Tier3InvokeNotifyFreqLog;
1067 }
1068 if (FLAG_IS_DEFAULT(Tier4InvocationThreshold)) {
1069 Tier4InvocationThreshold = Arguments::_Tier4InvocationThreshold;
1070 }
1071 }
1072
1073 // Change from defaults based on mode
1074 switch (mode) {
1075 default:
1076 ShouldNotReachHere();
1077 break;
1078 case _int:
1079 UseCompiler = false;
1080 UseLoopCounter = false;
1081 AlwaysCompileLoopMethods = false;
1082 UseOnStackReplacement = false;
1083 break;
1084 case _mixed:
1085 // same as default
1086 break;
1087 case _comp:
1088 UseInterpreter = false;
1089 BackgroundCompilation = false;
1090 ClipInlining = false;
1091 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more.
1092 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and
1093 // compile a level 4 (C2) and then continue executing it.
1094 if (TieredCompilation) {
1095 Tier3InvokeNotifyFreqLog = 0;
1096 Tier4InvocationThreshold = 0;
1097 }
1098 break;
1099 }
1100 }
1101
1102 #if defined(COMPILER2) || defined(_LP64) || !INCLUDE_CDS
1103 // Conflict: required to use shared spaces (-Xshare:on), but
1104 // incompatible command line options were chosen.
1105
1106 static void no_shared_spaces(const char* message) {
1107 if (RequireSharedSpaces) {
1108 jio_fprintf(defaultStream::error_stream(),
1109 "Class data sharing is inconsistent with other specified options.\n");
1110 vm_exit_during_initialization("Unable to use shared archive.", message);
1111 } else {
1112 FLAG_SET_DEFAULT(UseSharedSpaces, false);
1113 }
1114 }
1115 #endif
1116
1117 // Returns threshold scaled with the value of scale.
1118 // If scale < 0.0, threshold is returned without scaling.
1119 intx Arguments::scaled_compile_threshold(intx threshold, double scale) {
1120 if (scale == 1.0 || scale < 0.0) {
1121 return threshold;
1122 } else {
1123 return (intx)(threshold * scale);
1124 }
1125 }
1126
1127 // Returns freq_log scaled with the value of scale.
1128 // Returned values are in the range of [0, InvocationCounter::number_of_count_bits + 1].
1129 // If scale < 0.0, freq_log is returned without scaling.
1130 intx Arguments::scaled_freq_log(intx freq_log, double scale) {
1131 // Check if scaling is necessary or if negative value was specified.
1132 if (scale == 1.0 || scale < 0.0) {
1133 return freq_log;
1134 }
1135 // Check values to avoid calculating log2 of 0.
1136 if (scale == 0.0 || freq_log == 0) {
1137 return 0;
1138 }
1139 // Determine the maximum notification frequency value currently supported.
1140 // The largest mask value that the interpreter/C1 can handle is
1141 // of length InvocationCounter::number_of_count_bits. Mask values are always
1142 // one bit shorter then the value of the notification frequency. Set
1143 // max_freq_bits accordingly.
1144 intx max_freq_bits = InvocationCounter::number_of_count_bits + 1;
1145 intx scaled_freq = scaled_compile_threshold((intx)1 << freq_log, scale);
1146 if (scaled_freq == 0) {
1147 // Return 0 right away to avoid calculating log2 of 0.
1148 return 0;
1149 } else if (scaled_freq > nth_bit(max_freq_bits)) {
1150 return max_freq_bits;
1151 } else {
1152 return log2_intptr(scaled_freq);
1153 }
1154 }
1155
1156 void Arguments::set_tiered_flags() {
1157 // With tiered, set default policy to AdvancedThresholdPolicy, which is 3.
1158 if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) {
1159 FLAG_SET_DEFAULT(CompilationPolicyChoice, 3);
1160 }
1161 if (CompilationPolicyChoice < 2) {
1162 vm_exit_during_initialization(
1163 "Incompatible compilation policy selected", NULL);
1164 }
1165 // Increase the code cache size - tiered compiles a lot more.
1166 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
1167 FLAG_SET_ERGO(uintx, ReservedCodeCacheSize,
1168 MIN2(CODE_CACHE_DEFAULT_LIMIT, ReservedCodeCacheSize * 5));
1169 }
1170 // Enable SegmentedCodeCache if TieredCompilation is enabled and ReservedCodeCacheSize >= 240M
1171 if (FLAG_IS_DEFAULT(SegmentedCodeCache) && ReservedCodeCacheSize >= 240*M) {
1172 FLAG_SET_ERGO(bool, SegmentedCodeCache, true);
1173
1174 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
1175 // Multiply sizes by 5 but fix NonNMethodCodeHeapSize (distribute among non-profiled and profiled code heap)
1176 if (FLAG_IS_DEFAULT(ProfiledCodeHeapSize)) {
1177 FLAG_SET_ERGO(uintx, ProfiledCodeHeapSize, ProfiledCodeHeapSize * 5 + NonNMethodCodeHeapSize * 2);
1178 }
1179 if (FLAG_IS_DEFAULT(NonProfiledCodeHeapSize)) {
1180 FLAG_SET_ERGO(uintx, NonProfiledCodeHeapSize, NonProfiledCodeHeapSize * 5 + NonNMethodCodeHeapSize * 2);
1181 }
1182 // Check consistency of code heap sizes
1183 if ((NonNMethodCodeHeapSize + NonProfiledCodeHeapSize + ProfiledCodeHeapSize) != ReservedCodeCacheSize) {
1184 jio_fprintf(defaultStream::error_stream(),
1185 "Invalid code heap sizes: NonNMethodCodeHeapSize(%dK) + ProfiledCodeHeapSize(%dK) + NonProfiledCodeHeapSize(%dK) = %dK. Must be equal to ReservedCodeCacheSize = %uK.\n",
1186 NonNMethodCodeHeapSize/K, ProfiledCodeHeapSize/K, NonProfiledCodeHeapSize/K,
1187 (NonNMethodCodeHeapSize + ProfiledCodeHeapSize + NonProfiledCodeHeapSize)/K, ReservedCodeCacheSize/K);
1188 vm_exit(1);
1189 }
1190 }
1191 }
1192 if (!UseInterpreter) { // -Xcomp
1193 Tier3InvokeNotifyFreqLog = 0;
1194 Tier4InvocationThreshold = 0;
1195 }
1196
1197 if (CompileThresholdScaling < 0) {
1198 vm_exit_during_initialization("Negative value specified for CompileThresholdScaling", NULL);
1199 }
1200
1201 // Scale tiered compilation thresholds.
1202 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves compilation thresholds unchanged.
1203 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
1204 FLAG_SET_ERGO(intx, Tier0InvokeNotifyFreqLog, scaled_freq_log(Tier0InvokeNotifyFreqLog));
1205 FLAG_SET_ERGO(intx, Tier0BackedgeNotifyFreqLog, scaled_freq_log(Tier0BackedgeNotifyFreqLog));
1206
1207 FLAG_SET_ERGO(intx, Tier3InvocationThreshold, scaled_compile_threshold(Tier3InvocationThreshold));
1208 FLAG_SET_ERGO(intx, Tier3MinInvocationThreshold, scaled_compile_threshold(Tier3MinInvocationThreshold));
1209 FLAG_SET_ERGO(intx, Tier3CompileThreshold, scaled_compile_threshold(Tier3CompileThreshold));
1210 FLAG_SET_ERGO(intx, Tier3BackEdgeThreshold, scaled_compile_threshold(Tier3BackEdgeThreshold));
1211
1212 // Tier2{Invocation,MinInvocation,Compile,Backedge}Threshold should be scaled here
1213 // once these thresholds become supported.
1214
1215 FLAG_SET_ERGO(intx, Tier2InvokeNotifyFreqLog, scaled_freq_log(Tier2InvokeNotifyFreqLog));
1216 FLAG_SET_ERGO(intx, Tier2BackedgeNotifyFreqLog, scaled_freq_log(Tier2BackedgeNotifyFreqLog));
1217
1218 FLAG_SET_ERGO(intx, Tier3InvokeNotifyFreqLog, scaled_freq_log(Tier3InvokeNotifyFreqLog));
1219 FLAG_SET_ERGO(intx, Tier3BackedgeNotifyFreqLog, scaled_freq_log(Tier3BackedgeNotifyFreqLog));
1220
1221 FLAG_SET_ERGO(intx, Tier23InlineeNotifyFreqLog, scaled_freq_log(Tier23InlineeNotifyFreqLog));
1222
1223 FLAG_SET_ERGO(intx, Tier4InvocationThreshold, scaled_compile_threshold(Tier4InvocationThreshold));
1224 FLAG_SET_ERGO(intx, Tier4MinInvocationThreshold, scaled_compile_threshold(Tier4MinInvocationThreshold));
1225 FLAG_SET_ERGO(intx, Tier4CompileThreshold, scaled_compile_threshold(Tier4CompileThreshold));
1226 FLAG_SET_ERGO(intx, Tier4BackEdgeThreshold, scaled_compile_threshold(Tier4BackEdgeThreshold));
1227 }
1228 }
1229
1230 #if INCLUDE_ALL_GCS
1231 static void disable_adaptive_size_policy(const char* collector_name) {
1232 if (UseAdaptiveSizePolicy) {
1233 if (FLAG_IS_CMDLINE(UseAdaptiveSizePolicy)) {
1234 warning("disabling UseAdaptiveSizePolicy; it is incompatible with %s.",
1235 collector_name);
1236 }
1237 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false);
1238 }
1239 }
1240
1241 void Arguments::set_parnew_gc_flags() {
1242 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC && !UseG1GC,
1243 "control point invariant");
1244 assert(UseConcMarkSweepGC, "CMS is expected to be on here");
1245 assert(UseParNewGC, "ParNew should always be used with CMS");
1246
1247 if (FLAG_IS_DEFAULT(ParallelGCThreads)) {
1248 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads());
1249 assert(ParallelGCThreads > 0, "We should always have at least one thread by default");
1250 } else if (ParallelGCThreads == 0) {
1251 jio_fprintf(defaultStream::error_stream(),
1252 "The ParNew GC can not be combined with -XX:ParallelGCThreads=0\n");
1253 vm_exit(1);
1254 }
1255
1256 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 respectively,
1257 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration
1258 // we set them to 1024 and 1024.
1259 // See CR 6362902.
1260 if (FLAG_IS_DEFAULT(YoungPLABSize)) {
1261 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024);
1262 }
1263 if (FLAG_IS_DEFAULT(OldPLABSize)) {
1264 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024);
1265 }
1266
1267 // When using compressed oops, we use local overflow stacks,
1268 // rather than using a global overflow list chained through
1269 // the klass word of the object's pre-image.
1270 if (UseCompressedOops && !ParGCUseLocalOverflow) {
1271 if (!FLAG_IS_DEFAULT(ParGCUseLocalOverflow)) {
1272 warning("Forcing +ParGCUseLocalOverflow: needed if using compressed references");
1273 }
1274 FLAG_SET_DEFAULT(ParGCUseLocalOverflow, true);
1275 }
1276 assert(ParGCUseLocalOverflow || !UseCompressedOops, "Error");
1277 }
1278
1279 // Adjust some sizes to suit CMS and/or ParNew needs; these work well on
1280 // sparc/solaris for certain applications, but would gain from
1281 // further optimization and tuning efforts, and would almost
1282 // certainly gain from analysis of platform and environment.
1283 void Arguments::set_cms_and_parnew_gc_flags() {
1284 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC, "Error");
1285 assert(UseConcMarkSweepGC, "CMS is expected to be on here");
1286 assert(UseParNewGC, "ParNew should always be used with CMS");
1287
1288 // Turn off AdaptiveSizePolicy by default for cms until it is complete.
1289 disable_adaptive_size_policy("UseConcMarkSweepGC");
1290
1291 set_parnew_gc_flags();
1292
1293 size_t max_heap = align_size_down(MaxHeapSize,
1294 CardTableRS::ct_max_alignment_constraint());
1295
1296 // Now make adjustments for CMS
1297 intx tenuring_default = (intx)6;
1298 size_t young_gen_per_worker = CMSYoungGenPerWorker;
1299
1300 // Preferred young gen size for "short" pauses:
1301 // upper bound depends on # of threads and NewRatio.
1302 const size_t preferred_max_new_size_unaligned =
1303 MIN2(max_heap/(NewRatio+1), ScaleForWordSize(young_gen_per_worker * ParallelGCThreads));
1304 size_t preferred_max_new_size =
1305 align_size_up(preferred_max_new_size_unaligned, os::vm_page_size());
1306
1307 // Unless explicitly requested otherwise, size young gen
1308 // for "short" pauses ~ CMSYoungGenPerWorker*ParallelGCThreads
1309
1310 // If either MaxNewSize or NewRatio is set on the command line,
1311 // assume the user is trying to set the size of the young gen.
1312 if (FLAG_IS_DEFAULT(MaxNewSize) && FLAG_IS_DEFAULT(NewRatio)) {
1313
1314 // Set MaxNewSize to our calculated preferred_max_new_size unless
1315 // NewSize was set on the command line and it is larger than
1316 // preferred_max_new_size.
1317 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line
1318 FLAG_SET_ERGO(size_t, MaxNewSize, MAX2(NewSize, preferred_max_new_size));
1319 } else {
1320 FLAG_SET_ERGO(size_t, MaxNewSize, preferred_max_new_size);
1321 }
1322 if (PrintGCDetails && Verbose) {
1323 // Too early to use gclog_or_tty
1324 tty->print_cr("CMS ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize);
1325 }
1326
1327 // Code along this path potentially sets NewSize and OldSize
1328 if (PrintGCDetails && Verbose) {
1329 // Too early to use gclog_or_tty
1330 tty->print_cr("CMS set min_heap_size: " SIZE_FORMAT
1331 " initial_heap_size: " SIZE_FORMAT
1332 " max_heap: " SIZE_FORMAT,
1333 min_heap_size(), InitialHeapSize, max_heap);
1334 }
1335 size_t min_new = preferred_max_new_size;
1336 if (FLAG_IS_CMDLINE(NewSize)) {
1337 min_new = NewSize;
1338 }
1339 if (max_heap > min_new && min_heap_size() > min_new) {
1340 // Unless explicitly requested otherwise, make young gen
1341 // at least min_new, and at most preferred_max_new_size.
1342 if (FLAG_IS_DEFAULT(NewSize)) {
1343 FLAG_SET_ERGO(size_t, NewSize, MAX2(NewSize, min_new));
1344 FLAG_SET_ERGO(size_t, NewSize, MIN2(preferred_max_new_size, NewSize));
1345 if (PrintGCDetails && Verbose) {
1346 // Too early to use gclog_or_tty
1347 tty->print_cr("CMS ergo set NewSize: " SIZE_FORMAT, NewSize);
1348 }
1349 }
1350 // Unless explicitly requested otherwise, size old gen
1351 // so it's NewRatio x of NewSize.
1352 if (FLAG_IS_DEFAULT(OldSize)) {
1353 if (max_heap > NewSize) {
1354 FLAG_SET_ERGO(size_t, OldSize, MIN2(NewRatio*NewSize, max_heap - NewSize));
1355 if (PrintGCDetails && Verbose) {
1356 // Too early to use gclog_or_tty
1357 tty->print_cr("CMS ergo set OldSize: " SIZE_FORMAT, OldSize);
1358 }
1359 }
1360 }
1361 }
1362 }
1363 // Unless explicitly requested otherwise, definitely
1364 // promote all objects surviving "tenuring_default" scavenges.
1365 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) &&
1366 FLAG_IS_DEFAULT(SurvivorRatio)) {
1367 FLAG_SET_ERGO(uintx, MaxTenuringThreshold, tenuring_default);
1368 }
1369 // If we decided above (or user explicitly requested)
1370 // `promote all' (via MaxTenuringThreshold := 0),
1371 // prefer minuscule survivor spaces so as not to waste
1372 // space for (non-existent) survivors
1373 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) {
1374 FLAG_SET_ERGO(uintx, SurvivorRatio, MAX2((uintx)1024, SurvivorRatio));
1375 }
1376
1377 // OldPLABSize is interpreted in CMS as not the size of the PLAB in words,
1378 // but rather the number of free blocks of a given size that are used when
1379 // replenishing the local per-worker free list caches.
1380 if (FLAG_IS_DEFAULT(OldPLABSize)) {
1381 if (!FLAG_IS_DEFAULT(ResizeOldPLAB) && !ResizeOldPLAB) {
1382 // OldPLAB sizing manually turned off: Use a larger default setting,
1383 // unless it was manually specified. This is because a too-low value
1384 // will slow down scavenges.
1385 FLAG_SET_ERGO(size_t, OldPLABSize, CFLS_LAB::_default_static_old_plab_size); // default value before 6631166
1386 } else {
1387 FLAG_SET_DEFAULT(OldPLABSize, CFLS_LAB::_default_dynamic_old_plab_size); // old CMSParPromoteBlocksToClaim default
1388 }
1389 }
1390
1391 // If either of the static initialization defaults have changed, note this
1392 // modification.
1393 if (!FLAG_IS_DEFAULT(OldPLABSize) || !FLAG_IS_DEFAULT(OldPLABWeight)) {
1394 CFLS_LAB::modify_initialization(OldPLABSize, OldPLABWeight);
1395 }
1396
1397 if (!ClassUnloading) {
1398 FLAG_SET_CMDLINE(bool, CMSClassUnloadingEnabled, false);
1399 FLAG_SET_CMDLINE(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false);
1400 }
1401
1402 if (PrintGCDetails && Verbose) {
1403 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk",
1404 (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K));
1405 tty->print_cr("ConcGCThreads: %u", ConcGCThreads);
1406 }
1407 }
1408 #endif // INCLUDE_ALL_GCS
1409
1410 void set_object_alignment() {
1411 // Object alignment.
1412 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2");
1413 MinObjAlignmentInBytes = ObjectAlignmentInBytes;
1414 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small");
1415 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize;
1416 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect");
1417 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1;
1418
1419 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes);
1420 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize;
1421
1422 // Oop encoding heap max
1423 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes;
1424
1425 if (SurvivorAlignmentInBytes == 0) {
1426 SurvivorAlignmentInBytes = ObjectAlignmentInBytes;
1427 }
1428
1429 #if INCLUDE_ALL_GCS
1430 // Set CMS global values
1431 CompactibleFreeListSpace::set_cms_values();
1432 #endif // INCLUDE_ALL_GCS
1433 }
1434
1435 size_t Arguments::max_heap_for_compressed_oops() {
1436 // Avoid sign flip.
1437 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size");
1438 // We need to fit both the NULL page and the heap into the memory budget, while
1439 // keeping alignment constraints of the heap. To guarantee the latter, as the
1440 // NULL page is located before the heap, we pad the NULL page to the conservative
1441 // maximum alignment that the GC may ever impose upon the heap.
1442 size_t displacement_due_to_null_page = align_size_up_(os::vm_page_size(),
1443 _conservative_max_heap_alignment);
1444
1445 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page);
1446 NOT_LP64(ShouldNotReachHere(); return 0);
1447 }
1448
1449 bool Arguments::should_auto_select_low_pause_collector() {
1450 if (UseAutoGCSelectPolicy &&
1451 !FLAG_IS_DEFAULT(MaxGCPauseMillis) &&
1452 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) {
1453 if (PrintGCDetails) {
1454 // Cannot use gclog_or_tty yet.
1455 tty->print_cr("Automatic selection of the low pause collector"
1456 " based on pause goal of %d (ms)", (int) MaxGCPauseMillis);
1457 }
1458 return true;
1459 }
1460 return false;
1461 }
1462
1463 void Arguments::set_use_compressed_oops() {
1464 #ifndef ZERO
1465 #ifdef _LP64
1466 // MaxHeapSize is not set up properly at this point, but
1467 // the only value that can override MaxHeapSize if we are
1468 // to use UseCompressedOops is InitialHeapSize.
1469 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize);
1470
1471 if (max_heap_size <= max_heap_for_compressed_oops()) {
1472 #if !defined(COMPILER1) || defined(TIERED)
1473 if (FLAG_IS_DEFAULT(UseCompressedOops)) {
1474 FLAG_SET_ERGO(bool, UseCompressedOops, true);
1475 }
1476 #endif
1477 } else {
1478 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) {
1479 warning("Max heap size too large for Compressed Oops");
1480 FLAG_SET_DEFAULT(UseCompressedOops, false);
1481 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1482 }
1483 }
1484 #endif // _LP64
1485 #endif // ZERO
1486 }
1487
1488
1489 // NOTE: set_use_compressed_klass_ptrs() must be called after calling
1490 // set_use_compressed_oops().
1491 void Arguments::set_use_compressed_klass_ptrs() {
1492 #ifndef ZERO
1493 #ifdef _LP64
1494 // UseCompressedOops must be on for UseCompressedClassPointers to be on.
1495 if (!UseCompressedOops) {
1496 if (UseCompressedClassPointers) {
1497 warning("UseCompressedClassPointers requires UseCompressedOops");
1498 }
1499 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1500 } else {
1501 // Turn on UseCompressedClassPointers too
1502 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) {
1503 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true);
1504 }
1505 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs.
1506 if (UseCompressedClassPointers) {
1507 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) {
1508 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers");
1509 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1510 }
1511 }
1512 }
1513 #endif // _LP64
1514 #endif // !ZERO
1515 }
1516
1517 void Arguments::set_conservative_max_heap_alignment() {
1518 // The conservative maximum required alignment for the heap is the maximum of
1519 // the alignments imposed by several sources: any requirements from the heap
1520 // itself, the collector policy and the maximum page size we may run the VM
1521 // with.
1522 size_t heap_alignment = GenCollectedHeap::conservative_max_heap_alignment();
1523 #if INCLUDE_ALL_GCS
1524 if (UseParallelGC) {
1525 heap_alignment = ParallelScavengeHeap::conservative_max_heap_alignment();
1526 } else if (UseG1GC) {
1527 heap_alignment = G1CollectedHeap::conservative_max_heap_alignment();
1528 }
1529 #endif // INCLUDE_ALL_GCS
1530 _conservative_max_heap_alignment = MAX4(heap_alignment,
1531 (size_t)os::vm_allocation_granularity(),
1532 os::max_page_size(),
1533 CollectorPolicy::compute_heap_alignment());
1534 }
1535
1536 void Arguments::select_gc_ergonomically() {
1537 if (os::is_server_class_machine()) {
1538 if (should_auto_select_low_pause_collector()) {
1539 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true);
1540 } else {
1541 #if defined(JAVASE_EMBEDDED)
1542 FLAG_SET_ERGO(bool, UseParallelGC, true);
1543 #else
1544 FLAG_SET_ERGO(bool, UseG1GC, true);
1545 #endif
1546 }
1547 } else {
1548 FLAG_SET_ERGO(bool, UseSerialGC, true);
1549 }
1550 }
1551
1552 void Arguments::select_gc() {
1553 if (!gc_selected()) {
1554 select_gc_ergonomically();
1555 guarantee(gc_selected(), "No GC selected");
1556 }
1557 }
1558
1559 void Arguments::set_ergonomics_flags() {
1560 select_gc();
1561
1562 #ifdef COMPILER2
1563 // Shared spaces work fine with other GCs but causes bytecode rewriting
1564 // to be disabled, which hurts interpreter performance and decreases
1565 // server performance. When -server is specified, keep the default off
1566 // unless it is asked for. Future work: either add bytecode rewriting
1567 // at link time, or rewrite bytecodes in non-shared methods.
1568 if (!DumpSharedSpaces && !RequireSharedSpaces &&
1569 (FLAG_IS_DEFAULT(UseSharedSpaces) || !UseSharedSpaces)) {
1570 no_shared_spaces("COMPILER2 default: -Xshare:auto | off, have to manually setup to on.");
1571 }
1572 #endif
1573
1574 set_conservative_max_heap_alignment();
1575
1576 #ifndef ZERO
1577 #ifdef _LP64
1578 set_use_compressed_oops();
1579
1580 // set_use_compressed_klass_ptrs() must be called after calling
1581 // set_use_compressed_oops().
1582 set_use_compressed_klass_ptrs();
1583
1584 // Also checks that certain machines are slower with compressed oops
1585 // in vm_version initialization code.
1586 #endif // _LP64
1587 #endif // !ZERO
1588
1589 // Set up runtime image flags.
1590 set_runtime_image_flags();
1591
1592 CodeCacheExtensions::set_ergonomics_flags();
1593 }
1594
1595 void Arguments::set_parallel_gc_flags() {
1596 assert(UseParallelGC || UseParallelOldGC, "Error");
1597 // Enable ParallelOld unless it was explicitly disabled (cmd line or rc file).
1598 if (FLAG_IS_DEFAULT(UseParallelOldGC)) {
1599 FLAG_SET_DEFAULT(UseParallelOldGC, true);
1600 }
1601 FLAG_SET_DEFAULT(UseParallelGC, true);
1602
1603 // If no heap maximum was requested explicitly, use some reasonable fraction
1604 // of the physical memory, up to a maximum of 1GB.
1605 FLAG_SET_DEFAULT(ParallelGCThreads,
1606 Abstract_VM_Version::parallel_worker_threads());
1607 if (ParallelGCThreads == 0) {
1608 jio_fprintf(defaultStream::error_stream(),
1609 "The Parallel GC can not be combined with -XX:ParallelGCThreads=0\n");
1610 vm_exit(1);
1611 }
1612
1613 if (UseAdaptiveSizePolicy) {
1614 // We don't want to limit adaptive heap sizing's freedom to adjust the heap
1615 // unless the user actually sets these flags.
1616 if (FLAG_IS_DEFAULT(MinHeapFreeRatio)) {
1617 FLAG_SET_DEFAULT(MinHeapFreeRatio, 0);
1618 _min_heap_free_ratio = MinHeapFreeRatio;
1619 }
1620 if (FLAG_IS_DEFAULT(MaxHeapFreeRatio)) {
1621 FLAG_SET_DEFAULT(MaxHeapFreeRatio, 100);
1622 _max_heap_free_ratio = MaxHeapFreeRatio;
1623 }
1624 }
1625
1626 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the
1627 // SurvivorRatio has been set, reset their default values to SurvivorRatio +
1628 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger.
1629 // See CR 6362902 for details.
1630 if (!FLAG_IS_DEFAULT(SurvivorRatio)) {
1631 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) {
1632 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2);
1633 }
1634 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) {
1635 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2);
1636 }
1637 }
1638
1639 if (UseParallelOldGC) {
1640 // Par compact uses lower default values since they are treated as
1641 // minimums. These are different defaults because of the different
1642 // interpretation and are not ergonomically set.
1643 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) {
1644 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1);
1645 }
1646 }
1647 }
1648
1649 void Arguments::set_g1_gc_flags() {
1650 assert(UseG1GC, "Error");
1651 #ifdef COMPILER1
1652 FastTLABRefill = false;
1653 #endif
1654 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads());
1655 if (ParallelGCThreads == 0) {
1656 assert(!FLAG_IS_DEFAULT(ParallelGCThreads), "The default value for ParallelGCThreads should not be 0.");
1657 vm_exit_during_initialization("The flag -XX:+UseG1GC can not be combined with -XX:ParallelGCThreads=0", NULL);
1658 }
1659
1660 #if INCLUDE_ALL_GCS
1661 if (G1ConcRefinementThreads == 0) {
1662 FLAG_SET_DEFAULT(G1ConcRefinementThreads, ParallelGCThreads);
1663 }
1664 #endif
1665
1666 // MarkStackSize will be set (if it hasn't been set by the user)
1667 // when concurrent marking is initialized.
1668 // Its value will be based upon the number of parallel marking threads.
1669 // But we do set the maximum mark stack size here.
1670 if (FLAG_IS_DEFAULT(MarkStackSizeMax)) {
1671 FLAG_SET_DEFAULT(MarkStackSizeMax, 128 * TASKQUEUE_SIZE);
1672 }
1673
1674 if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) {
1675 // In G1, we want the default GC overhead goal to be higher than
1676 // say in PS. So we set it here to 10%. Otherwise the heap might
1677 // be expanded more aggressively than we would like it to. In
1678 // fact, even 10% seems to not be high enough in some cases
1679 // (especially small GC stress tests that the main thing they do
1680 // is allocation). We might consider increase it further.
1681 FLAG_SET_DEFAULT(GCTimeRatio, 9);
1682 }
1683
1684 #ifdef THREAD_LOCAL_SAFEPOINT_SUPPORT
1685 if (!FLAG_IS_DEFAULT(G1ElideMembar) && G1ElideMembar) {
1686 if (!FLAG_IS_DEFAULT(UseMembar) && !UseMembar) {
1687 UseMembar = true;
1688 jio_fprintf(defaultStream::error_stream(),
1689 "When G1ElideMembar is set, UseMembar must also be set\n");
1690 } else {
1691 UseMembar = true;
1692 }
1693 if (!FLAG_IS_DEFAULT(ThreadLocalSafepoints) && !ThreadLocalSafepoints) {
1694 ThreadLocalSafepoints = true;
1695 jio_fprintf(defaultStream::error_stream(),
1696 "When G1ElideMembar is set, ThreadLocalSafepoints must also be set\n");
1697 } else {
1698 ThreadLocalSafepoints = true;
1699 }
1700 }
1701 #else
1702 if (G1ElideMembar) {
1703 jio_fprintf(defaultStream::error_stream(),
1704 "G1ElideMembar is not supported on this platform\n");
1705 G1ElideMembar = false;
1706 }
1707 #endif
1708
1709 if (PrintGCDetails && Verbose) {
1710 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk",
1711 (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K));
1712 tty->print_cr("ConcGCThreads: %u", ConcGCThreads);
1713 }
1714 }
1715
1716 #if !INCLUDE_ALL_GCS
1717 #ifdef ASSERT
1718 static bool verify_serial_gc_flags() {
1719 return (UseSerialGC &&
1720 !(UseParNewGC || (UseConcMarkSweepGC) || UseG1GC ||
1721 UseParallelGC || UseParallelOldGC));
1722 }
1723 #endif // ASSERT
1724 #endif // INCLUDE_ALL_GCS
1725
1726 void Arguments::set_gc_specific_flags() {
1727 #if INCLUDE_ALL_GCS
1728 // Set per-collector flags
1729 if (UseParallelGC || UseParallelOldGC) {
1730 set_parallel_gc_flags();
1731 } else if (UseConcMarkSweepGC) {
1732 set_cms_and_parnew_gc_flags();
1733 } else if (UseG1GC) {
1734 set_g1_gc_flags();
1735 }
1736 check_deprecated_gc_flags();
1737 if (AssumeMP && !UseSerialGC) {
1738 if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) {
1739 warning("If the number of processors is expected to increase from one, then"
1740 " you should configure the number of parallel GC threads appropriately"
1741 " using -XX:ParallelGCThreads=N");
1742 }
1743 }
1744 if (MinHeapFreeRatio == 100) {
1745 // Keeping the heap 100% free is hard ;-) so limit it to 99%.
1746 FLAG_SET_ERGO(uintx, MinHeapFreeRatio, 99);
1747 }
1748 #else // INCLUDE_ALL_GCS
1749 assert(verify_serial_gc_flags(), "SerialGC unset");
1750 #endif // INCLUDE_ALL_GCS
1751 }
1752
1753 julong Arguments::limit_by_allocatable_memory(julong limit) {
1754 julong max_allocatable;
1755 julong result = limit;
1756 if (os::has_allocatable_memory_limit(&max_allocatable)) {
1757 result = MIN2(result, max_allocatable / MaxVirtMemFraction);
1758 }
1759 return result;
1760 }
1761
1762 // Use static initialization to get the default before parsing
1763 static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress;
1764
1765 void Arguments::set_heap_size() {
1766 if (!FLAG_IS_DEFAULT(DefaultMaxRAMFraction)) {
1767 // Deprecated flag
1768 FLAG_SET_CMDLINE(uintx, MaxRAMFraction, DefaultMaxRAMFraction);
1769 }
1770
1771 const julong phys_mem =
1772 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM)
1773 : (julong)MaxRAM;
1774
1775 // If the maximum heap size has not been set with -Xmx,
1776 // then set it as fraction of the size of physical memory,
1777 // respecting the maximum and minimum sizes of the heap.
1778 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
1779 julong reasonable_max = phys_mem / MaxRAMFraction;
1780
1781 if (phys_mem <= MaxHeapSize * MinRAMFraction) {
1782 // Small physical memory, so use a minimum fraction of it for the heap
1783 reasonable_max = phys_mem / MinRAMFraction;
1784 } else {
1785 // Not-small physical memory, so require a heap at least
1786 // as large as MaxHeapSize
1787 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize);
1788 }
1789 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) {
1790 // Limit the heap size to ErgoHeapSizeLimit
1791 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit);
1792 }
1793 if (UseCompressedOops) {
1794 // Limit the heap size to the maximum possible when using compressed oops
1795 julong max_coop_heap = (julong)max_heap_for_compressed_oops();
1796
1797 // HeapBaseMinAddress can be greater than default but not less than.
1798 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) {
1799 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) {
1800 // matches compressed oops printing flags
1801 if (PrintCompressedOopsMode || (PrintMiscellaneous && Verbose)) {
1802 jio_fprintf(defaultStream::error_stream(),
1803 "HeapBaseMinAddress must be at least " SIZE_FORMAT
1804 " (" SIZE_FORMAT "G) which is greater than value given "
1805 SIZE_FORMAT "\n",
1806 DefaultHeapBaseMinAddress,
1807 DefaultHeapBaseMinAddress/G,
1808 HeapBaseMinAddress);
1809 }
1810 FLAG_SET_ERGO(size_t, HeapBaseMinAddress, DefaultHeapBaseMinAddress);
1811 }
1812 }
1813
1814 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) {
1815 // Heap should be above HeapBaseMinAddress to get zero based compressed oops
1816 // but it should be not less than default MaxHeapSize.
1817 max_coop_heap -= HeapBaseMinAddress;
1818 }
1819 reasonable_max = MIN2(reasonable_max, max_coop_heap);
1820 }
1821 reasonable_max = limit_by_allocatable_memory(reasonable_max);
1822
1823 if (!FLAG_IS_DEFAULT(InitialHeapSize)) {
1824 // An initial heap size was specified on the command line,
1825 // so be sure that the maximum size is consistent. Done
1826 // after call to limit_by_allocatable_memory because that
1827 // method might reduce the allocation size.
1828 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize);
1829 }
1830
1831 if (PrintGCDetails && Verbose) {
1832 // Cannot use gclog_or_tty yet.
1833 tty->print_cr(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max);
1834 }
1835 FLAG_SET_ERGO(size_t, MaxHeapSize, (size_t)reasonable_max);
1836 }
1837
1838 // If the minimum or initial heap_size have not been set or requested to be set
1839 // ergonomically, set them accordingly.
1840 if (InitialHeapSize == 0 || min_heap_size() == 0) {
1841 julong reasonable_minimum = (julong)(OldSize + NewSize);
1842
1843 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize);
1844
1845 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum);
1846
1847 if (InitialHeapSize == 0) {
1848 julong reasonable_initial = phys_mem / InitialRAMFraction;
1849
1850 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size());
1851 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize);
1852
1853 reasonable_initial = limit_by_allocatable_memory(reasonable_initial);
1854
1855 if (PrintGCDetails && Verbose) {
1856 // Cannot use gclog_or_tty yet.
1857 tty->print_cr(" Initial heap size " SIZE_FORMAT, (size_t)reasonable_initial);
1858 }
1859 FLAG_SET_ERGO(size_t, InitialHeapSize, (size_t)reasonable_initial);
1860 }
1861 // If the minimum heap size has not been set (via -Xms),
1862 // synchronize with InitialHeapSize to avoid errors with the default value.
1863 if (min_heap_size() == 0) {
1864 set_min_heap_size(MIN2((size_t)reasonable_minimum, InitialHeapSize));
1865 if (PrintGCDetails && Verbose) {
1866 // Cannot use gclog_or_tty yet.
1867 tty->print_cr(" Minimum heap size " SIZE_FORMAT, min_heap_size());
1868 }
1869 }
1870 }
1871 }
1872
1873 // Set up runtime image flags
1874 void Arguments::set_runtime_image_flags() {
1875 #ifdef _LP64
1876 // Memory map image file by default on 64 bit machines.
1877 if (FLAG_IS_DEFAULT(MemoryMapImage)) {
1878 FLAG_SET_ERGO(bool, MemoryMapImage, true);
1879 }
1880 #endif
1881 }
1882
1883 // This must be called after ergonomics.
1884 void Arguments::set_bytecode_flags() {
1885 if (!RewriteBytecodes) {
1886 FLAG_SET_DEFAULT(RewriteFrequentPairs, false);
1887 }
1888 }
1889
1890 // Aggressive optimization flags -XX:+AggressiveOpts
1891 void Arguments::set_aggressive_opts_flags() {
1892 #ifdef COMPILER2
1893 if (AggressiveUnboxing) {
1894 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
1895 FLAG_SET_DEFAULT(EliminateAutoBox, true);
1896 } else if (!EliminateAutoBox) {
1897 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled");
1898 AggressiveUnboxing = false;
1899 }
1900 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) {
1901 FLAG_SET_DEFAULT(DoEscapeAnalysis, true);
1902 } else if (!DoEscapeAnalysis) {
1903 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled");
1904 AggressiveUnboxing = false;
1905 }
1906 }
1907 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
1908 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
1909 FLAG_SET_DEFAULT(EliminateAutoBox, true);
1910 }
1911 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
1912 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000);
1913 }
1914
1915 // Feed the cache size setting into the JDK
1916 char buffer[1024];
1917 sprintf(buffer, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax);
1918 add_property(buffer);
1919 }
1920 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) {
1921 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500);
1922 }
1923 #endif
1924
1925 if (AggressiveOpts) {
1926 // Sample flag setting code
1927 // if (FLAG_IS_DEFAULT(EliminateZeroing)) {
1928 // FLAG_SET_DEFAULT(EliminateZeroing, true);
1929 // }
1930 }
1931 }
1932
1933 //===========================================================================================================
1934 // Parsing of java.compiler property
1935
1936 void Arguments::process_java_compiler_argument(char* arg) {
1937 // For backwards compatibility, Djava.compiler=NONE or ""
1938 // causes us to switch to -Xint mode UNLESS -Xdebug
1939 // is also specified.
1940 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) {
1941 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen.
1942 }
1943 }
1944
1945 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) {
1946 _sun_java_launcher = os::strdup_check_oom(launcher);
1947 }
1948
1949 bool Arguments::created_by_java_launcher() {
1950 assert(_sun_java_launcher != NULL, "property must have value");
1951 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0;
1952 }
1953
1954 bool Arguments::sun_java_launcher_is_altjvm() {
1955 return _sun_java_launcher_is_altjvm;
1956 }
1957
1958 //===========================================================================================================
1959 // Parsing of main arguments
1960
1961 // check if do gclog rotation
1962 // +UseGCLogFileRotation is a must,
1963 // no gc log rotation when log file not supplied or
1964 // NumberOfGCLogFiles is 0
1965 void check_gclog_consistency() {
1966 if (UseGCLogFileRotation) {
1967 if ((Arguments::gc_log_filename() == NULL) || (NumberOfGCLogFiles == 0)) {
1968 jio_fprintf(defaultStream::output_stream(),
1969 "To enable GC log rotation, use -Xloggc:<filename> -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=<num_of_files>\n"
1970 "where num_of_file > 0\n"
1971 "GC log rotation is turned off\n");
1972 UseGCLogFileRotation = false;
1973 }
1974 }
1975
1976 if (UseGCLogFileRotation && (GCLogFileSize != 0) && (GCLogFileSize < 8*K)) {
1977 if (FLAG_SET_CMDLINE(size_t, GCLogFileSize, 8*K) == Flag::SUCCESS) {
1978 jio_fprintf(defaultStream::output_stream(),
1979 "GCLogFileSize changed to minimum 8K\n");
1980 }
1981 }
1982 }
1983
1984 // This function is called for -Xloggc:<filename>, it can be used
1985 // to check if a given file name(or string) conforms to the following
1986 // specification:
1987 // A valid string only contains "[A-Z][a-z][0-9].-_%[p|t]"
1988 // %p and %t only allowed once. We only limit usage of filename not path
1989 bool is_filename_valid(const char *file_name) {
1990 const char* p = file_name;
1991 char file_sep = os::file_separator()[0];
1992 const char* cp;
1993 // skip prefix path
1994 for (cp = file_name; *cp != '\0'; cp++) {
1995 if (*cp == '/' || *cp == file_sep) {
1996 p = cp + 1;
1997 }
1998 }
1999
2000 int count_p = 0;
2001 int count_t = 0;
2002 while (*p != '\0') {
2003 if ((*p >= '0' && *p <= '9') ||
2004 (*p >= 'A' && *p <= 'Z') ||
2005 (*p >= 'a' && *p <= 'z') ||
2006 *p == '-' ||
2007 *p == '_' ||
2008 *p == '.') {
2009 p++;
2010 continue;
2011 }
2012 if (*p == '%') {
2013 if(*(p + 1) == 'p') {
2014 p += 2;
2015 count_p ++;
2016 continue;
2017 }
2018 if (*(p + 1) == 't') {
2019 p += 2;
2020 count_t ++;
2021 continue;
2022 }
2023 }
2024 return false;
2025 }
2026 return count_p < 2 && count_t < 2;
2027 }
2028
2029 // Check consistency of GC selection
2030 bool Arguments::check_gc_consistency() {
2031 check_gclog_consistency();
2032 // Ensure that the user has not selected conflicting sets
2033 // of collectors.
2034 uint i = 0;
2035 if (UseSerialGC) i++;
2036 if (UseConcMarkSweepGC) i++;
2037 if (UseParallelGC || UseParallelOldGC) i++;
2038 if (UseG1GC) i++;
2039 if (i > 1) {
2040 jio_fprintf(defaultStream::error_stream(),
2041 "Conflicting collector combinations in option list; "
2042 "please refer to the release notes for the combinations "
2043 "allowed\n");
2044 return false;
2045 }
2046
2047 if (UseConcMarkSweepGC && !UseParNewGC) {
2048 jio_fprintf(defaultStream::error_stream(),
2049 "It is not possible to combine the DefNew young collector with the CMS collector.\n");
2050 return false;
2051 }
2052
2053 if (UseParNewGC && !UseConcMarkSweepGC) {
2054 jio_fprintf(defaultStream::error_stream(),
2055 "It is not possible to combine the ParNew young collector with any collector other than CMS.\n");
2056 return false;
2057 }
2058
2059 return true;
2060 }
2061
2062 void Arguments::check_deprecated_gc_flags() {
2063 if (FLAG_IS_CMDLINE(UseParNewGC)) {
2064 warning("The UseParNewGC flag is deprecated and will likely be removed in a future release");
2065 }
2066 if (FLAG_IS_CMDLINE(MaxGCMinorPauseMillis)) {
2067 warning("Using MaxGCMinorPauseMillis as minor pause goal is deprecated"
2068 "and will likely be removed in future release");
2069 }
2070 if (FLAG_IS_CMDLINE(DefaultMaxRAMFraction)) {
2071 warning("DefaultMaxRAMFraction is deprecated and will likely be removed in a future release. "
2072 "Use MaxRAMFraction instead.");
2073 }
2074 }
2075
2076 // Check the consistency of vm_init_args
2077 bool Arguments::check_vm_args_consistency() {
2078 // Method for adding checks for flag consistency.
2079 // The intent is to warn the user of all possible conflicts,
2080 // before returning an error.
2081 // Note: Needs platform-dependent factoring.
2082 bool status = true;
2083
2084 if (TLABRefillWasteFraction == 0) {
2085 jio_fprintf(defaultStream::error_stream(),
2086 "TLABRefillWasteFraction should be a denominator, "
2087 "not " SIZE_FORMAT "\n",
2088 TLABRefillWasteFraction);
2089 status = false;
2090 }
2091
2092 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) {
2093 MarkSweepAlwaysCompactCount = 1; // Move objects every gc.
2094 }
2095
2096 if (UseParallelOldGC && ParallelOldGCSplitALot) {
2097 // Settings to encourage splitting.
2098 if (!FLAG_IS_CMDLINE(NewRatio)) {
2099 if (FLAG_SET_CMDLINE(uintx, NewRatio, 2) != Flag::SUCCESS) {
2100 status = false;
2101 }
2102 }
2103 if (!FLAG_IS_CMDLINE(ScavengeBeforeFullGC)) {
2104 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
2105 status = false;
2106 }
2107 }
2108 }
2109
2110 if (!(UseParallelGC || UseParallelOldGC) && FLAG_IS_DEFAULT(ScavengeBeforeFullGC)) {
2111 FLAG_SET_DEFAULT(ScavengeBeforeFullGC, false);
2112 }
2113
2114 if (GCTimeLimit == 100) {
2115 // Turn off gc-overhead-limit-exceeded checks
2116 FLAG_SET_DEFAULT(UseGCOverheadLimit, false);
2117 }
2118
2119 status = status && check_gc_consistency();
2120
2121 // CMS space iteration, which FLSVerifyAllHeapreferences entails,
2122 // insists that we hold the requisite locks so that the iteration is
2123 // MT-safe. For the verification at start-up and shut-down, we don't
2124 // yet have a good way of acquiring and releasing these locks,
2125 // which are not visible at the CollectedHeap level. We want to
2126 // be able to acquire these locks and then do the iteration rather
2127 // than just disable the lock verification. This will be fixed under
2128 // bug 4788986.
2129 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) {
2130 if (VerifyDuringStartup) {
2131 warning("Heap verification at start-up disabled "
2132 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
2133 VerifyDuringStartup = false; // Disable verification at start-up
2134 }
2135
2136 if (VerifyBeforeExit) {
2137 warning("Heap verification at shutdown disabled "
2138 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
2139 VerifyBeforeExit = false; // Disable verification at shutdown
2140 }
2141 }
2142
2143 // Note: only executed in non-PRODUCT mode
2144 if (!UseAsyncConcMarkSweepGC &&
2145 (ExplicitGCInvokesConcurrent ||
2146 ExplicitGCInvokesConcurrentAndUnloadsClasses)) {
2147 jio_fprintf(defaultStream::error_stream(),
2148 "error: +ExplicitGCInvokesConcurrent[AndUnloadsClasses] conflicts"
2149 " with -UseAsyncConcMarkSweepGC");
2150 status = false;
2151 }
2152
2153 if (PrintNMTStatistics) {
2154 #if INCLUDE_NMT
2155 if (MemTracker::tracking_level() == NMT_off) {
2156 #endif // INCLUDE_NMT
2157 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled");
2158 PrintNMTStatistics = false;
2159 #if INCLUDE_NMT
2160 }
2161 #endif
2162 }
2163
2164 // Check lower bounds of the code cache
2165 // Template Interpreter code is approximately 3X larger in debug builds.
2166 uint min_code_cache_size = CodeCacheMinimumUseSpace DEBUG_ONLY(* 3);
2167 if (InitialCodeCacheSize < (uintx)os::vm_page_size()) {
2168 jio_fprintf(defaultStream::error_stream(),
2169 "Invalid InitialCodeCacheSize=%dK. Must be at least %dK.\n", InitialCodeCacheSize/K,
2170 os::vm_page_size()/K);
2171 status = false;
2172 } else if (ReservedCodeCacheSize < InitialCodeCacheSize) {
2173 jio_fprintf(defaultStream::error_stream(),
2174 "Invalid ReservedCodeCacheSize: %dK. Must be at least InitialCodeCacheSize=%dK.\n",
2175 ReservedCodeCacheSize/K, InitialCodeCacheSize/K);
2176 status = false;
2177 } else if (ReservedCodeCacheSize < min_code_cache_size) {
2178 jio_fprintf(defaultStream::error_stream(),
2179 "Invalid ReservedCodeCacheSize=%dK. Must be at least %uK.\n", ReservedCodeCacheSize/K,
2180 min_code_cache_size/K);
2181 status = false;
2182 } else if (ReservedCodeCacheSize > CODE_CACHE_SIZE_LIMIT) {
2183 // Code cache size larger than CODE_CACHE_SIZE_LIMIT is not supported.
2184 jio_fprintf(defaultStream::error_stream(),
2185 "Invalid ReservedCodeCacheSize=%dM. Must be at most %uM.\n", ReservedCodeCacheSize/M,
2186 CODE_CACHE_SIZE_LIMIT/M);
2187 status = false;
2188 } else if (NonNMethodCodeHeapSize < min_code_cache_size){
2189 jio_fprintf(defaultStream::error_stream(),
2190 "Invalid NonNMethodCodeHeapSize=%dK. Must be at least %uK.\n", NonNMethodCodeHeapSize/K,
2191 min_code_cache_size/K);
2192 status = false;
2193 } else if ((!FLAG_IS_DEFAULT(NonNMethodCodeHeapSize) || !FLAG_IS_DEFAULT(ProfiledCodeHeapSize) || !FLAG_IS_DEFAULT(NonProfiledCodeHeapSize))
2194 && (NonNMethodCodeHeapSize + NonProfiledCodeHeapSize + ProfiledCodeHeapSize) != ReservedCodeCacheSize) {
2195 jio_fprintf(defaultStream::error_stream(),
2196 "Invalid code heap sizes: NonNMethodCodeHeapSize(%dK) + ProfiledCodeHeapSize(%dK) + NonProfiledCodeHeapSize(%dK) = %dK. Must be equal to ReservedCodeCacheSize = %uK.\n",
2197 NonNMethodCodeHeapSize/K, ProfiledCodeHeapSize/K, NonProfiledCodeHeapSize/K,
2198 (NonNMethodCodeHeapSize + ProfiledCodeHeapSize + NonProfiledCodeHeapSize)/K, ReservedCodeCacheSize/K);
2199 status = false;
2200 }
2201
2202 if (!FLAG_IS_DEFAULT(CICompilerCount) && !FLAG_IS_DEFAULT(CICompilerCountPerCPU) && CICompilerCountPerCPU) {
2203 warning("The VM option CICompilerCountPerCPU overrides CICompilerCount.");
2204 }
2205
2206 return status;
2207 }
2208
2209 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore,
2210 const char* option_type) {
2211 if (ignore) return false;
2212
2213 const char* spacer = " ";
2214 if (option_type == NULL) {
2215 option_type = ++spacer; // Set both to the empty string.
2216 }
2217
2218 if (os::obsolete_option(option)) {
2219 jio_fprintf(defaultStream::error_stream(),
2220 "Obsolete %s%soption: %s\n", option_type, spacer,
2221 option->optionString);
2222 return false;
2223 } else {
2224 jio_fprintf(defaultStream::error_stream(),
2225 "Unrecognized %s%soption: %s\n", option_type, spacer,
2226 option->optionString);
2227 return true;
2228 }
2229 }
2230
2231 static const char* user_assertion_options[] = {
2232 "-da", "-ea", "-disableassertions", "-enableassertions", 0
2233 };
2234
2235 static const char* system_assertion_options[] = {
2236 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0
2237 };
2238
2239 bool Arguments::parse_uintx(const char* value,
2240 uintx* uintx_arg,
2241 uintx min_size) {
2242
2243 // Check the sign first since atomull() parses only unsigned values.
2244 bool value_is_positive = !(*value == '-');
2245
2246 if (value_is_positive) {
2247 julong n;
2248 bool good_return = atomull(value, &n);
2249 if (good_return) {
2250 bool above_minimum = n >= min_size;
2251 bool value_is_too_large = n > max_uintx;
2252
2253 if (above_minimum && !value_is_too_large) {
2254 *uintx_arg = n;
2255 return true;
2256 }
2257 }
2258 }
2259 return false;
2260 }
2261
2262 Arguments::ArgsRange Arguments::parse_memory_size(const char* s,
2263 julong* long_arg,
2264 julong min_size) {
2265 if (!atomull(s, long_arg)) return arg_unreadable;
2266 return check_memory_size(*long_arg, min_size);
2267 }
2268
2269 // Parse JavaVMInitArgs structure
2270
2271 jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args,
2272 const JavaVMInitArgs *java_options_args,
2273 const JavaVMInitArgs *cmd_line_args) {
2274 // For components of the system classpath.
2275 SysClassPath scp(Arguments::get_sysclasspath());
2276 bool scp_assembly_required = false;
2277
2278 // Save default settings for some mode flags
2279 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
2280 Arguments::_UseOnStackReplacement = UseOnStackReplacement;
2281 Arguments::_ClipInlining = ClipInlining;
2282 Arguments::_BackgroundCompilation = BackgroundCompilation;
2283 if (TieredCompilation) {
2284 Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
2285 Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
2286 }
2287
2288 // Setup flags for mixed which is the default
2289 set_mode_flags(_mixed);
2290
2291 // Parse args structure generated from JAVA_TOOL_OPTIONS environment
2292 // variable (if present).
2293 jint result = parse_each_vm_init_arg(
2294 java_tool_options_args, &scp, &scp_assembly_required, Flag::ENVIRON_VAR);
2295 if (result != JNI_OK) {
2296 return result;
2297 }
2298
2299 // Parse args structure generated from the command line flags.
2300 result = parse_each_vm_init_arg(cmd_line_args, &scp, &scp_assembly_required,
2301 Flag::COMMAND_LINE);
2302 if (result != JNI_OK) {
2303 return result;
2304 }
2305
2306 // Parse args structure generated from the _JAVA_OPTIONS environment
2307 // variable (if present) (mimics classic VM)
2308 result = parse_each_vm_init_arg(
2309 java_options_args, &scp, &scp_assembly_required, Flag::ENVIRON_VAR);
2310 if (result != JNI_OK) {
2311 return result;
2312 }
2313
2314 // Do final processing now that all arguments have been parsed
2315 result = finalize_vm_init_args(&scp, scp_assembly_required);
2316 if (result != JNI_OK) {
2317 return result;
2318 }
2319
2320 return JNI_OK;
2321 }
2322
2323 // Checks if name in command-line argument -agent{lib,path}:name[=options]
2324 // represents a valid HPROF of JDWP agent. is_path==true denotes that we
2325 // are dealing with -agentpath (case where name is a path), otherwise with
2326 // -agentlib
2327 bool valid_hprof_or_jdwp_agent(char *name, bool is_path) {
2328 char *_name;
2329 const char *_hprof = "hprof", *_jdwp = "jdwp";
2330 size_t _len_hprof, _len_jdwp, _len_prefix;
2331
2332 if (is_path) {
2333 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) {
2334 return false;
2335 }
2336
2337 _name++; // skip past last path separator
2338 _len_prefix = strlen(JNI_LIB_PREFIX);
2339
2340 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) {
2341 return false;
2342 }
2343
2344 _name += _len_prefix;
2345 _len_hprof = strlen(_hprof);
2346 _len_jdwp = strlen(_jdwp);
2347
2348 if (strncmp(_name, _hprof, _len_hprof) == 0) {
2349 _name += _len_hprof;
2350 }
2351 else if (strncmp(_name, _jdwp, _len_jdwp) == 0) {
2352 _name += _len_jdwp;
2353 }
2354 else {
2355 return false;
2356 }
2357
2358 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) {
2359 return false;
2360 }
2361
2362 return true;
2363 }
2364
2365 if (strcmp(name, _hprof) == 0 || strcmp(name, _jdwp) == 0) {
2366 return true;
2367 }
2368
2369 return false;
2370 }
2371
2372 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args,
2373 SysClassPath* scp_p,
2374 bool* scp_assembly_required_p,
2375 Flag::Flags origin) {
2376 // Remaining part of option string
2377 const char* tail;
2378
2379 // iterate over arguments
2380 for (int index = 0; index < args->nOptions; index++) {
2381 bool is_absolute_path = false; // for -agentpath vs -agentlib
2382
2383 const JavaVMOption* option = args->options + index;
2384
2385 if (!match_option(option, "-Djava.class.path", &tail) &&
2386 !match_option(option, "-Dsun.java.command", &tail) &&
2387 !match_option(option, "-Dsun.java.launcher", &tail)) {
2388
2389 // add all jvm options to the jvm_args string. This string
2390 // is used later to set the java.vm.args PerfData string constant.
2391 // the -Djava.class.path and the -Dsun.java.command options are
2392 // omitted from jvm_args string as each have their own PerfData
2393 // string constant object.
2394 build_jvm_args(option->optionString);
2395 }
2396
2397 // -verbose:[class/gc/jni]
2398 if (match_option(option, "-verbose", &tail)) {
2399 if (!strcmp(tail, ":class") || !strcmp(tail, "")) {
2400 if (FLAG_SET_CMDLINE(bool, TraceClassLoading, true) != Flag::SUCCESS) {
2401 return JNI_EINVAL;
2402 }
2403 if (FLAG_SET_CMDLINE(bool, TraceClassUnloading, true) != Flag::SUCCESS) {
2404 return JNI_EINVAL;
2405 }
2406 } else if (!strcmp(tail, ":gc")) {
2407 if (FLAG_SET_CMDLINE(bool, PrintGC, true) != Flag::SUCCESS) {
2408 return JNI_EINVAL;
2409 }
2410 } else if (!strcmp(tail, ":jni")) {
2411 if (FLAG_SET_CMDLINE(bool, PrintJNIResolving, true) != Flag::SUCCESS) {
2412 return JNI_EINVAL;
2413 }
2414 }
2415 // -da / -ea / -disableassertions / -enableassertions
2416 // These accept an optional class/package name separated by a colon, e.g.,
2417 // -da:java.lang.Thread.
2418 } else if (match_option(option, user_assertion_options, &tail, true)) {
2419 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2420 if (*tail == '\0') {
2421 JavaAssertions::setUserClassDefault(enable);
2422 } else {
2423 assert(*tail == ':', "bogus match by match_option()");
2424 JavaAssertions::addOption(tail + 1, enable);
2425 }
2426 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions
2427 } else if (match_option(option, system_assertion_options, &tail, false)) {
2428 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2429 JavaAssertions::setSystemClassDefault(enable);
2430 // -bootclasspath:
2431 } else if (match_option(option, "-Xbootclasspath:", &tail)) {
2432 scp_p->reset_path(tail);
2433 *scp_assembly_required_p = true;
2434 // -bootclasspath/a:
2435 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) {
2436 scp_p->add_suffix(tail);
2437 *scp_assembly_required_p = true;
2438 // -bootclasspath/p:
2439 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) {
2440 scp_p->add_prefix(tail);
2441 *scp_assembly_required_p = true;
2442 // -Xrun
2443 } else if (match_option(option, "-Xrun", &tail)) {
2444 if (tail != NULL) {
2445 const char* pos = strchr(tail, ':');
2446 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2447 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len);
2448 name[len] = '\0';
2449
2450 char *options = NULL;
2451 if(pos != NULL) {
2452 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied.
2453 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtInternal), pos+1, len2);
2454 }
2455 #if !INCLUDE_JVMTI
2456 if ((strcmp(name, "hprof") == 0) || (strcmp(name, "jdwp") == 0)) {
2457 jio_fprintf(defaultStream::error_stream(),
2458 "Profiling and debugging agents are not supported in this VM\n");
2459 return JNI_ERR;
2460 }
2461 #endif // !INCLUDE_JVMTI
2462 add_init_library(name, options);
2463 }
2464 // -agentlib and -agentpath
2465 } else if (match_option(option, "-agentlib:", &tail) ||
2466 (is_absolute_path = match_option(option, "-agentpath:", &tail))) {
2467 if(tail != NULL) {
2468 const char* pos = strchr(tail, '=');
2469 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2470 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len);
2471 name[len] = '\0';
2472
2473 char *options = NULL;
2474 if(pos != NULL) {
2475 options = os::strdup_check_oom(pos + 1, mtInternal);
2476 }
2477 #if !INCLUDE_JVMTI
2478 if (valid_hprof_or_jdwp_agent(name, is_absolute_path)) {
2479 jio_fprintf(defaultStream::error_stream(),
2480 "Profiling and debugging agents are not supported in this VM\n");
2481 return JNI_ERR;
2482 }
2483 #endif // !INCLUDE_JVMTI
2484 add_init_agent(name, options, is_absolute_path);
2485 }
2486 // -javaagent
2487 } else if (match_option(option, "-javaagent:", &tail)) {
2488 #if !INCLUDE_JVMTI
2489 jio_fprintf(defaultStream::error_stream(),
2490 "Instrumentation agents are not supported in this VM\n");
2491 return JNI_ERR;
2492 #else
2493 if(tail != NULL) {
2494 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1, mtInternal), tail);
2495 add_init_agent("instrument", options, false);
2496 }
2497 #endif // !INCLUDE_JVMTI
2498 // -Xnoclassgc
2499 } else if (match_option(option, "-Xnoclassgc")) {
2500 if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != Flag::SUCCESS) {
2501 return JNI_EINVAL;
2502 }
2503 // -Xconcgc
2504 } else if (match_option(option, "-Xconcgc")) {
2505 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true) != Flag::SUCCESS) {
2506 return JNI_EINVAL;
2507 }
2508 // -Xnoconcgc
2509 } else if (match_option(option, "-Xnoconcgc")) {
2510 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false) != Flag::SUCCESS) {
2511 return JNI_EINVAL;
2512 }
2513 // -Xbatch
2514 } else if (match_option(option, "-Xbatch")) {
2515 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
2516 return JNI_EINVAL;
2517 }
2518 // -Xmn for compatibility with other JVM vendors
2519 } else if (match_option(option, "-Xmn", &tail)) {
2520 julong long_initial_young_size = 0;
2521 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1);
2522 if (errcode != arg_in_range) {
2523 jio_fprintf(defaultStream::error_stream(),
2524 "Invalid initial young generation size: %s\n", option->optionString);
2525 describe_range_error(errcode);
2526 return JNI_EINVAL;
2527 }
2528 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
2529 return JNI_EINVAL;
2530 }
2531 if (FLAG_SET_CMDLINE(size_t, NewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
2532 return JNI_EINVAL;
2533 }
2534 // -Xms
2535 } else if (match_option(option, "-Xms", &tail)) {
2536 julong long_initial_heap_size = 0;
2537 // an initial heap size of 0 means automatically determine
2538 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0);
2539 if (errcode != arg_in_range) {
2540 jio_fprintf(defaultStream::error_stream(),
2541 "Invalid initial heap size: %s\n", option->optionString);
2542 describe_range_error(errcode);
2543 return JNI_EINVAL;
2544 }
2545 set_min_heap_size((size_t)long_initial_heap_size);
2546 // Currently the minimum size and the initial heap sizes are the same.
2547 // Can be overridden with -XX:InitialHeapSize.
2548 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, (size_t)long_initial_heap_size) != Flag::SUCCESS) {
2549 return JNI_EINVAL;
2550 }
2551 // -Xmx
2552 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) {
2553 julong long_max_heap_size = 0;
2554 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1);
2555 if (errcode != arg_in_range) {
2556 jio_fprintf(defaultStream::error_stream(),
2557 "Invalid maximum heap size: %s\n", option->optionString);
2558 describe_range_error(errcode);
2559 return JNI_EINVAL;
2560 }
2561 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, (size_t)long_max_heap_size) != Flag::SUCCESS) {
2562 return JNI_EINVAL;
2563 }
2564 // Xmaxf
2565 } else if (match_option(option, "-Xmaxf", &tail)) {
2566 char* err;
2567 int maxf = (int)(strtod(tail, &err) * 100);
2568 if (*err != '\0' || *tail == '\0') {
2569 jio_fprintf(defaultStream::error_stream(),
2570 "Bad max heap free percentage size: %s\n",
2571 option->optionString);
2572 return JNI_EINVAL;
2573 } else {
2574 if (FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf) != Flag::SUCCESS) {
2575 return JNI_EINVAL;
2576 }
2577 }
2578 // Xminf
2579 } else if (match_option(option, "-Xminf", &tail)) {
2580 char* err;
2581 int minf = (int)(strtod(tail, &err) * 100);
2582 if (*err != '\0' || *tail == '\0') {
2583 jio_fprintf(defaultStream::error_stream(),
2584 "Bad min heap free percentage size: %s\n",
2585 option->optionString);
2586 return JNI_EINVAL;
2587 } else {
2588 if (FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf) != Flag::SUCCESS) {
2589 return JNI_EINVAL;
2590 }
2591 }
2592 // -Xss
2593 } else if (match_option(option, "-Xss", &tail)) {
2594 julong long_ThreadStackSize = 0;
2595 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000);
2596 if (errcode != arg_in_range) {
2597 jio_fprintf(defaultStream::error_stream(),
2598 "Invalid thread stack size: %s\n", option->optionString);
2599 describe_range_error(errcode);
2600 return JNI_EINVAL;
2601 }
2602 // Internally track ThreadStackSize in units of 1024 bytes.
2603 if (FLAG_SET_CMDLINE(intx, ThreadStackSize,
2604 round_to((int)long_ThreadStackSize, K) / K) != Flag::SUCCESS) {
2605 return JNI_EINVAL;
2606 }
2607 // -Xoss, -Xsqnopause, -Xoptimize, -Xboundthreads
2608 } else if (match_option(option, "-Xoss", &tail) ||
2609 match_option(option, "-Xsqnopause") ||
2610 match_option(option, "-Xoptimize") ||
2611 match_option(option, "-Xboundthreads")) {
2612 // All these options are deprecated in JDK 9 and will be removed in a future release
2613 char version[256];
2614 JDK_Version::jdk(9).to_string(version, sizeof(version));
2615 warning("ignoring option %s; support was removed in %s", option->optionString, version);
2616 } else if (match_option(option, "-XX:CodeCacheExpansionSize=", &tail)) {
2617 julong long_CodeCacheExpansionSize = 0;
2618 ArgsRange errcode = parse_memory_size(tail, &long_CodeCacheExpansionSize, os::vm_page_size());
2619 if (errcode != arg_in_range) {
2620 jio_fprintf(defaultStream::error_stream(),
2621 "Invalid argument: %s. Must be at least %luK.\n", option->optionString,
2622 os::vm_page_size()/K);
2623 return JNI_EINVAL;
2624 }
2625 if (FLAG_SET_CMDLINE(uintx, CodeCacheExpansionSize, (uintx)long_CodeCacheExpansionSize) != Flag::SUCCESS) {
2626 return JNI_EINVAL;
2627 }
2628 } else if (match_option(option, "-Xmaxjitcodesize", &tail) ||
2629 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) {
2630 julong long_ReservedCodeCacheSize = 0;
2631
2632 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1);
2633 if (errcode != arg_in_range) {
2634 jio_fprintf(defaultStream::error_stream(),
2635 "Invalid maximum code cache size: %s.\n", option->optionString);
2636 return JNI_EINVAL;
2637 }
2638 if (FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != Flag::SUCCESS) {
2639 return JNI_EINVAL;
2640 }
2641 // -XX:NonNMethodCodeHeapSize=
2642 } else if (match_option(option, "-XX:NonNMethodCodeHeapSize=", &tail)) {
2643 julong long_NonNMethodCodeHeapSize = 0;
2644
2645 ArgsRange errcode = parse_memory_size(tail, &long_NonNMethodCodeHeapSize, 1);
2646 if (errcode != arg_in_range) {
2647 jio_fprintf(defaultStream::error_stream(),
2648 "Invalid maximum non-nmethod code heap size: %s.\n", option->optionString);
2649 return JNI_EINVAL;
2650 }
2651 if (FLAG_SET_CMDLINE(uintx, NonNMethodCodeHeapSize, (uintx)long_NonNMethodCodeHeapSize) != Flag::SUCCESS) {
2652 return JNI_EINVAL;
2653 }
2654 // -XX:ProfiledCodeHeapSize=
2655 } else if (match_option(option, "-XX:ProfiledCodeHeapSize=", &tail)) {
2656 julong long_ProfiledCodeHeapSize = 0;
2657
2658 ArgsRange errcode = parse_memory_size(tail, &long_ProfiledCodeHeapSize, 1);
2659 if (errcode != arg_in_range) {
2660 jio_fprintf(defaultStream::error_stream(),
2661 "Invalid maximum profiled code heap size: %s.\n", option->optionString);
2662 return JNI_EINVAL;
2663 }
2664 if (FLAG_SET_CMDLINE(uintx, ProfiledCodeHeapSize, (uintx)long_ProfiledCodeHeapSize) != Flag::SUCCESS) {
2665 return JNI_EINVAL;
2666 }
2667 // -XX:NonProfiledCodeHeapSizee=
2668 } else if (match_option(option, "-XX:NonProfiledCodeHeapSize=", &tail)) {
2669 julong long_NonProfiledCodeHeapSize = 0;
2670
2671 ArgsRange errcode = parse_memory_size(tail, &long_NonProfiledCodeHeapSize, 1);
2672 if (errcode != arg_in_range) {
2673 jio_fprintf(defaultStream::error_stream(),
2674 "Invalid maximum non-profiled code heap size: %s.\n", option->optionString);
2675 return JNI_EINVAL;
2676 }
2677 if (FLAG_SET_CMDLINE(uintx, NonProfiledCodeHeapSize, (uintx)long_NonProfiledCodeHeapSize) != Flag::SUCCESS) {
2678 return JNI_EINVAL;
2679 }
2680 // -green
2681 } else if (match_option(option, "-green")) {
2682 jio_fprintf(defaultStream::error_stream(),
2683 "Green threads support not available\n");
2684 return JNI_EINVAL;
2685 // -native
2686 } else if (match_option(option, "-native")) {
2687 // HotSpot always uses native threads, ignore silently for compatibility
2688 // -Xrs
2689 } else if (match_option(option, "-Xrs")) {
2690 // Classic/EVM option, new functionality
2691 if (FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true) != Flag::SUCCESS) {
2692 return JNI_EINVAL;
2693 }
2694 } else if (match_option(option, "-Xusealtsigs")) {
2695 // change default internal VM signals used - lower case for back compat
2696 if (FLAG_SET_CMDLINE(bool, UseAltSigs, true) != Flag::SUCCESS) {
2697 return JNI_EINVAL;
2698 }
2699 // -Xprof
2700 } else if (match_option(option, "-Xprof")) {
2701 #if INCLUDE_FPROF
2702 _has_profile = true;
2703 #else // INCLUDE_FPROF
2704 jio_fprintf(defaultStream::error_stream(),
2705 "Flat profiling is not supported in this VM.\n");
2706 return JNI_ERR;
2707 #endif // INCLUDE_FPROF
2708 // -Xconcurrentio
2709 } else if (match_option(option, "-Xconcurrentio")) {
2710 if (FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true) != Flag::SUCCESS) {
2711 return JNI_EINVAL;
2712 }
2713 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
2714 return JNI_EINVAL;
2715 }
2716 if (FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1) != Flag::SUCCESS) {
2717 return JNI_EINVAL;
2718 }
2719 if (FLAG_SET_CMDLINE(bool, UseTLAB, false) != Flag::SUCCESS) {
2720 return JNI_EINVAL;
2721 }
2722 if (FLAG_SET_CMDLINE(size_t, NewSizeThreadIncrease, 16 * K) != Flag::SUCCESS) { // 20Kb per thread added to new generation
2723 return JNI_EINVAL;
2724 }
2725
2726 // -Xinternalversion
2727 } else if (match_option(option, "-Xinternalversion")) {
2728 jio_fprintf(defaultStream::output_stream(), "%s\n",
2729 VM_Version::internal_vm_info_string());
2730 vm_exit(0);
2731 #ifndef PRODUCT
2732 // -Xprintflags
2733 } else if (match_option(option, "-Xprintflags")) {
2734 CommandLineFlags::printFlags(tty, false);
2735 vm_exit(0);
2736 #endif
2737 // -D
2738 } else if (match_option(option, "-D", &tail)) {
2739 const char* value;
2740 if (match_option(option, "-Djava.endorsed.dirs=", &value) &&
2741 *value!= '\0' && strcmp(value, "\"\"") != 0) {
2742 // abort if -Djava.endorsed.dirs is set
2743 jio_fprintf(defaultStream::output_stream(),
2744 "-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n"
2745 "in modular form will be supported via the concept of upgradeable modules.\n", value);
2746 return JNI_EINVAL;
2747 }
2748 if (match_option(option, "-Djava.ext.dirs=", &value) &&
2749 *value != '\0' && strcmp(value, "\"\"") != 0) {
2750 // abort if -Djava.ext.dirs is set
2751 jio_fprintf(defaultStream::output_stream(),
2752 "-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value);
2753 return JNI_EINVAL;
2754 }
2755
2756 if (!add_property(tail)) {
2757 return JNI_ENOMEM;
2758 }
2759 // Out of the box management support
2760 if (match_option(option, "-Dcom.sun.management", &tail)) {
2761 #if INCLUDE_MANAGEMENT
2762 if (FLAG_SET_CMDLINE(bool, ManagementServer, true) != Flag::SUCCESS) {
2763 return JNI_EINVAL;
2764 }
2765 #else
2766 jio_fprintf(defaultStream::output_stream(),
2767 "-Dcom.sun.management is not supported in this VM.\n");
2768 return JNI_ERR;
2769 #endif
2770 }
2771 // -Xint
2772 } else if (match_option(option, "-Xint")) {
2773 set_mode_flags(_int);
2774 // -Xmixed
2775 } else if (match_option(option, "-Xmixed")) {
2776 set_mode_flags(_mixed);
2777 // -Xcomp
2778 } else if (match_option(option, "-Xcomp")) {
2779 // for testing the compiler; turn off all flags that inhibit compilation
2780 set_mode_flags(_comp);
2781 // -Xshare:dump
2782 } else if (match_option(option, "-Xshare:dump")) {
2783 if (FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true) != Flag::SUCCESS) {
2784 return JNI_EINVAL;
2785 }
2786 set_mode_flags(_int); // Prevent compilation, which creates objects
2787 // -Xshare:on
2788 } else if (match_option(option, "-Xshare:on")) {
2789 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
2790 return JNI_EINVAL;
2791 }
2792 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
2793 return JNI_EINVAL;
2794 }
2795 // -Xshare:auto
2796 } else if (match_option(option, "-Xshare:auto")) {
2797 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
2798 return JNI_EINVAL;
2799 }
2800 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
2801 return JNI_EINVAL;
2802 }
2803 // -Xshare:off
2804 } else if (match_option(option, "-Xshare:off")) {
2805 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, false) != Flag::SUCCESS) {
2806 return JNI_EINVAL;
2807 }
2808 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
2809 return JNI_EINVAL;
2810 }
2811 // -Xverify
2812 } else if (match_option(option, "-Xverify", &tail)) {
2813 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) {
2814 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true) != Flag::SUCCESS) {
2815 return JNI_EINVAL;
2816 }
2817 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
2818 return JNI_EINVAL;
2819 }
2820 } else if (strcmp(tail, ":remote") == 0) {
2821 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
2822 return JNI_EINVAL;
2823 }
2824 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
2825 return JNI_EINVAL;
2826 }
2827 } else if (strcmp(tail, ":none") == 0) {
2828 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
2829 return JNI_EINVAL;
2830 }
2831 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false) != Flag::SUCCESS) {
2832 return JNI_EINVAL;
2833 }
2834 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) {
2835 return JNI_EINVAL;
2836 }
2837 // -Xdebug
2838 } else if (match_option(option, "-Xdebug")) {
2839 // note this flag has been used, then ignore
2840 set_xdebug_mode(true);
2841 // -Xnoagent
2842 } else if (match_option(option, "-Xnoagent")) {
2843 // For compatibility with classic. HotSpot refuses to load the old style agent.dll.
2844 } else if (match_option(option, "-Xloggc:", &tail)) {
2845 // Redirect GC output to the file. -Xloggc:<filename>
2846 // ostream_init_log(), when called will use this filename
2847 // to initialize a fileStream.
2848 _gc_log_filename = os::strdup_check_oom(tail);
2849 if (!is_filename_valid(_gc_log_filename)) {
2850 jio_fprintf(defaultStream::output_stream(),
2851 "Invalid file name for use with -Xloggc: Filename can only contain the "
2852 "characters [A-Z][a-z][0-9]-_.%%[p|t] but it has been %s\n"
2853 "Note %%p or %%t can only be used once\n", _gc_log_filename);
2854 return JNI_EINVAL;
2855 }
2856 if (FLAG_SET_CMDLINE(bool, PrintGC, true) != Flag::SUCCESS) {
2857 return JNI_EINVAL;
2858 }
2859 if (FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true) != Flag::SUCCESS) {
2860 return JNI_EINVAL;
2861 }
2862 // JNI hooks
2863 } else if (match_option(option, "-Xcheck", &tail)) {
2864 if (!strcmp(tail, ":jni")) {
2865 #if !INCLUDE_JNI_CHECK
2866 warning("JNI CHECKING is not supported in this VM");
2867 #else
2868 CheckJNICalls = true;
2869 #endif // INCLUDE_JNI_CHECK
2870 } else if (is_bad_option(option, args->ignoreUnrecognized,
2871 "check")) {
2872 return JNI_EINVAL;
2873 }
2874 } else if (match_option(option, "vfprintf")) {
2875 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo);
2876 } else if (match_option(option, "exit")) {
2877 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo);
2878 } else if (match_option(option, "abort")) {
2879 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo);
2880 // -XX:+AggressiveHeap
2881 } else if (match_option(option, "-XX:+AggressiveHeap")) {
2882
2883 // This option inspects the machine and attempts to set various
2884 // parameters to be optimal for long-running, memory allocation
2885 // intensive jobs. It is intended for machines with large
2886 // amounts of cpu and memory.
2887
2888 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit
2889 // VM, but we may not be able to represent the total physical memory
2890 // available (like having 8gb of memory on a box but using a 32bit VM).
2891 // Thus, we need to make sure we're using a julong for intermediate
2892 // calculations.
2893 julong initHeapSize;
2894 julong total_memory = os::physical_memory();
2895
2896 if (total_memory < (julong)256*M) {
2897 jio_fprintf(defaultStream::error_stream(),
2898 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n");
2899 vm_exit(1);
2900 }
2901
2902 // The heap size is half of available memory, or (at most)
2903 // all of possible memory less 160mb (leaving room for the OS
2904 // when using ISM). This is the maximum; because adaptive sizing
2905 // is turned on below, the actual space used may be smaller.
2906
2907 initHeapSize = MIN2(total_memory / (julong)2,
2908 total_memory - (julong)160*M);
2909
2910 initHeapSize = limit_by_allocatable_memory(initHeapSize);
2911
2912 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
2913 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, initHeapSize) != Flag::SUCCESS) {
2914 return JNI_EINVAL;
2915 }
2916 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, initHeapSize) != Flag::SUCCESS) {
2917 return JNI_EINVAL;
2918 }
2919 // Currently the minimum size and the initial heap sizes are the same.
2920 set_min_heap_size(initHeapSize);
2921 }
2922 if (FLAG_IS_DEFAULT(NewSize)) {
2923 // Make the young generation 3/8ths of the total heap.
2924 if (FLAG_SET_CMDLINE(size_t, NewSize,
2925 ((julong)MaxHeapSize / (julong)8) * (julong)3) != Flag::SUCCESS) {
2926 return JNI_EINVAL;
2927 }
2928 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, NewSize) != Flag::SUCCESS) {
2929 return JNI_EINVAL;
2930 }
2931 }
2932
2933 #if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
2934 FLAG_SET_DEFAULT(UseLargePages, true);
2935 #endif
2936
2937 // Increase some data structure sizes for efficiency
2938 if (FLAG_SET_CMDLINE(size_t, BaseFootPrintEstimate, MaxHeapSize) != Flag::SUCCESS) {
2939 return JNI_EINVAL;
2940 }
2941 if (FLAG_SET_CMDLINE(bool, ResizeTLAB, false) != Flag::SUCCESS) {
2942 return JNI_EINVAL;
2943 }
2944 if (FLAG_SET_CMDLINE(size_t, TLABSize, 256*K) != Flag::SUCCESS) {
2945 return JNI_EINVAL;
2946 }
2947
2948 // See the OldPLABSize comment below, but replace 'after promotion'
2949 // with 'after copying'. YoungPLABSize is the size of the survivor
2950 // space per-gc-thread buffers. The default is 4kw.
2951 if (FLAG_SET_CMDLINE(size_t, YoungPLABSize, 256*K) != Flag::SUCCESS) { // Note: this is in words
2952 return JNI_EINVAL;
2953 }
2954
2955 // OldPLABSize is the size of the buffers in the old gen that
2956 // UseParallelGC uses to promote live data that doesn't fit in the
2957 // survivor spaces. At any given time, there's one for each gc thread.
2958 // The default size is 1kw. These buffers are rarely used, since the
2959 // survivor spaces are usually big enough. For specjbb, however, there
2960 // are occasions when there's lots of live data in the young gen
2961 // and we end up promoting some of it. We don't have a definite
2962 // explanation for why bumping OldPLABSize helps, but the theory
2963 // is that a bigger PLAB results in retaining something like the
2964 // original allocation order after promotion, which improves mutator
2965 // locality. A minor effect may be that larger PLABs reduce the
2966 // number of PLAB allocation events during gc. The value of 8kw
2967 // was arrived at by experimenting with specjbb.
2968 if (FLAG_SET_CMDLINE(size_t, OldPLABSize, 8*K) != Flag::SUCCESS) { // Note: this is in words
2969 return JNI_EINVAL;
2970 }
2971
2972 // Enable parallel GC and adaptive generation sizing
2973 if (FLAG_SET_CMDLINE(bool, UseParallelGC, true) != Flag::SUCCESS) {
2974 return JNI_EINVAL;
2975 }
2976 FLAG_SET_DEFAULT(ParallelGCThreads,
2977 Abstract_VM_Version::parallel_worker_threads());
2978
2979 // Encourage steady state memory management
2980 if (FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100) != Flag::SUCCESS) {
2981 return JNI_EINVAL;
2982 }
2983
2984 // This appears to improve mutator locality
2985 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
2986 return JNI_EINVAL;
2987 }
2988
2989 // Get around early Solaris scheduling bug
2990 // (affinity vs other jobs on system)
2991 // but disallow DR and offlining (5008695).
2992 if (FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true) != Flag::SUCCESS) {
2993 return JNI_EINVAL;
2994 }
2995
2996 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure;
2997 // and the last option wins.
2998 } else if (match_option(option, "-XX:+NeverTenure")) {
2999 if (FLAG_SET_CMDLINE(bool, NeverTenure, true) != Flag::SUCCESS) {
3000 return JNI_EINVAL;
3001 }
3002 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
3003 return JNI_EINVAL;
3004 }
3005 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1) != Flag::SUCCESS) {
3006 return JNI_EINVAL;
3007 }
3008 } else if (match_option(option, "-XX:+AlwaysTenure")) {
3009 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3010 return JNI_EINVAL;
3011 }
3012 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
3013 return JNI_EINVAL;
3014 }
3015 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0) != Flag::SUCCESS) {
3016 return JNI_EINVAL;
3017 }
3018 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) {
3019 uintx max_tenuring_thresh = 0;
3020 if (!parse_uintx(tail, &max_tenuring_thresh, 0)) {
3021 jio_fprintf(defaultStream::error_stream(),
3022 "Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail);
3023 return JNI_EINVAL;
3024 }
3025
3026 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh) != Flag::SUCCESS) {
3027 return JNI_EINVAL;
3028 }
3029
3030 if (MaxTenuringThreshold == 0) {
3031 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3032 return JNI_EINVAL;
3033 }
3034 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
3035 return JNI_EINVAL;
3036 }
3037 } else {
3038 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3039 return JNI_EINVAL;
3040 }
3041 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
3042 return JNI_EINVAL;
3043 }
3044 }
3045 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) {
3046 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false) != Flag::SUCCESS) {
3047 return JNI_EINVAL;
3048 }
3049 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true) != Flag::SUCCESS) {
3050 return JNI_EINVAL;
3051 }
3052 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) {
3053 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false) != Flag::SUCCESS) {
3054 return JNI_EINVAL;
3055 }
3056 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true) != Flag::SUCCESS) {
3057 return JNI_EINVAL;
3058 }
3059 } else if (match_option(option, "-XX:+ExtendedDTraceProbes")) {
3060 #if defined(DTRACE_ENABLED)
3061 if (FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true) != Flag::SUCCESS) {
3062 return JNI_EINVAL;
3063 }
3064 if (FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true) != Flag::SUCCESS) {
3065 return JNI_EINVAL;
3066 }
3067 if (FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true) != Flag::SUCCESS) {
3068 return JNI_EINVAL;
3069 }
3070 if (FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true) != Flag::SUCCESS) {
3071 return JNI_EINVAL;
3072 }
3073 #else // defined(DTRACE_ENABLED)
3074 jio_fprintf(defaultStream::error_stream(),
3075 "ExtendedDTraceProbes flag is not applicable for this configuration\n");
3076 return JNI_EINVAL;
3077 #endif // defined(DTRACE_ENABLED)
3078 #ifdef ASSERT
3079 } else if (match_option(option, "-XX:+FullGCALot")) {
3080 if (FLAG_SET_CMDLINE(bool, FullGCALot, true) != Flag::SUCCESS) {
3081 return JNI_EINVAL;
3082 }
3083 // disable scavenge before parallel mark-compact
3084 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
3085 return JNI_EINVAL;
3086 }
3087 #endif
3088 } else if (match_option(option, "-XX:CMSMarkStackSize=", &tail) ||
3089 match_option(option, "-XX:G1MarkStackSize=", &tail)) {
3090 julong stack_size = 0;
3091 ArgsRange errcode = parse_memory_size(tail, &stack_size, 1);
3092 if (errcode != arg_in_range) {
3093 jio_fprintf(defaultStream::error_stream(),
3094 "Invalid mark stack size: %s\n", option->optionString);
3095 describe_range_error(errcode);
3096 return JNI_EINVAL;
3097 }
3098 jio_fprintf(defaultStream::error_stream(),
3099 "Please use -XX:MarkStackSize in place of "
3100 "-XX:CMSMarkStackSize or -XX:G1MarkStackSize in the future\n");
3101 if (FLAG_SET_CMDLINE(size_t, MarkStackSize, stack_size) != Flag::SUCCESS) {
3102 return JNI_EINVAL;
3103 }
3104 } else if (match_option(option, "-XX:CMSMarkStackSizeMax=", &tail)) {
3105 julong max_stack_size = 0;
3106 ArgsRange errcode = parse_memory_size(tail, &max_stack_size, 1);
3107 if (errcode != arg_in_range) {
3108 jio_fprintf(defaultStream::error_stream(),
3109 "Invalid maximum mark stack size: %s\n",
3110 option->optionString);
3111 describe_range_error(errcode);
3112 return JNI_EINVAL;
3113 }
3114 jio_fprintf(defaultStream::error_stream(),
3115 "Please use -XX:MarkStackSizeMax in place of "
3116 "-XX:CMSMarkStackSizeMax in the future\n");
3117 if (FLAG_SET_CMDLINE(size_t, MarkStackSizeMax, max_stack_size) != Flag::SUCCESS) {
3118 return JNI_EINVAL;
3119 }
3120 } else if (match_option(option, "-XX:ParallelMarkingThreads=", &tail) ||
3121 match_option(option, "-XX:ParallelCMSThreads=", &tail)) {
3122 uintx conc_threads = 0;
3123 if (!parse_uintx(tail, &conc_threads, 1)) {
3124 jio_fprintf(defaultStream::error_stream(),
3125 "Invalid concurrent threads: %s\n", option->optionString);
3126 return JNI_EINVAL;
3127 }
3128 jio_fprintf(defaultStream::error_stream(),
3129 "Please use -XX:ConcGCThreads in place of "
3130 "-XX:ParallelMarkingThreads or -XX:ParallelCMSThreads in the future\n");
3131 if (FLAG_SET_CMDLINE(uint, ConcGCThreads, conc_threads) != Flag::SUCCESS) {
3132 return JNI_EINVAL;
3133 }
3134 } else if (match_option(option, "-XX:MaxDirectMemorySize=", &tail)) {
3135 julong max_direct_memory_size = 0;
3136 ArgsRange errcode = parse_memory_size(tail, &max_direct_memory_size, 0);
3137 if (errcode != arg_in_range) {
3138 jio_fprintf(defaultStream::error_stream(),
3139 "Invalid maximum direct memory size: %s\n",
3140 option->optionString);
3141 describe_range_error(errcode);
3142 return JNI_EINVAL;
3143 }
3144 if (FLAG_SET_CMDLINE(size_t, MaxDirectMemorySize, max_direct_memory_size) != Flag::SUCCESS) {
3145 return JNI_EINVAL;
3146 }
3147 #if !INCLUDE_MANAGEMENT
3148 } else if (match_option(option, "-XX:+ManagementServer")) {
3149 jio_fprintf(defaultStream::error_stream(),
3150 "ManagementServer is not supported in this VM.\n");
3151 return JNI_ERR;
3152 #endif // INCLUDE_MANAGEMENT
3153 // CreateMinidumpOnCrash is removed, and replaced by CreateCoredumpOnCrash
3154 } else if (match_option(option, "-XX:+CreateMinidumpOnCrash")) {
3155 if (FLAG_SET_CMDLINE(bool, CreateCoredumpOnCrash, true) != Flag::SUCCESS) {
3156 return JNI_EINVAL;
3157 }
3158 jio_fprintf(defaultStream::output_stream(),
3159 "CreateMinidumpOnCrash is replaced by CreateCoredumpOnCrash: CreateCoredumpOnCrash is on\n");
3160 } else if (match_option(option, "-XX:-CreateMinidumpOnCrash")) {
3161 if (FLAG_SET_CMDLINE(bool, CreateCoredumpOnCrash, false) != Flag::SUCCESS) {
3162 return JNI_EINVAL;
3163 }
3164 jio_fprintf(defaultStream::output_stream(),
3165 "CreateMinidumpOnCrash is replaced by CreateCoredumpOnCrash: CreateCoredumpOnCrash is off\n");
3166 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx
3167 // Skip -XX:Flags= since that case has already been handled
3168 if (strncmp(tail, "Flags=", strlen("Flags=")) != 0) {
3169 if (!process_argument(tail, args->ignoreUnrecognized, origin)) {
3170 return JNI_EINVAL;
3171 }
3172 }
3173 // Unknown option
3174 } else if (is_bad_option(option, args->ignoreUnrecognized)) {
3175 return JNI_ERR;
3176 }
3177 }
3178
3179 // PrintSharedArchiveAndExit will turn on
3180 // -Xshare:on
3181 // -XX:+TraceClassPaths
3182 if (PrintSharedArchiveAndExit) {
3183 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
3184 return JNI_EINVAL;
3185 }
3186 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
3187 return JNI_EINVAL;
3188 }
3189 if (FLAG_SET_CMDLINE(bool, TraceClassPaths, true) != Flag::SUCCESS) {
3190 return JNI_EINVAL;
3191 }
3192 }
3193
3194 // Change the default value for flags which have different default values
3195 // when working with older JDKs.
3196 #ifdef LINUX
3197 if (JDK_Version::current().compare_major(6) <= 0 &&
3198 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) {
3199 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false);
3200 }
3201 #endif // LINUX
3202 fix_appclasspath();
3203 return JNI_OK;
3204 }
3205
3206 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled)
3207 //
3208 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar
3209 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar".
3210 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty
3211 // path is treated as the current directory.
3212 //
3213 // This causes problems with CDS, which requires that all directories specified in the classpath
3214 // must be empty. In most cases, applications do NOT want to load classes from the current
3215 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up
3216 // scripts compatible with CDS.
3217 void Arguments::fix_appclasspath() {
3218 if (IgnoreEmptyClassPaths) {
3219 const char separator = *os::path_separator();
3220 const char* src = _java_class_path->value();
3221
3222 // skip over all the leading empty paths
3223 while (*src == separator) {
3224 src ++;
3225 }
3226
3227 char* copy = os::strdup_check_oom(src, mtInternal);
3228
3229 // trim all trailing empty paths
3230 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) {
3231 *tail = '\0';
3232 }
3233
3234 char from[3] = {separator, separator, '\0'};
3235 char to [2] = {separator, '\0'};
3236 while (StringUtils::replace_no_expand(copy, from, to) > 0) {
3237 // Keep replacing "::" -> ":" until we have no more "::" (non-windows)
3238 // Keep replacing ";;" -> ";" until we have no more ";;" (windows)
3239 }
3240
3241 _java_class_path->set_value(copy);
3242 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore
3243 }
3244
3245 if (!PrintSharedArchiveAndExit) {
3246 ClassLoader::trace_class_path("[classpath: ", _java_class_path->value());
3247 }
3248 }
3249
3250 static bool has_jar_files(const char* directory) {
3251 DIR* dir = os::opendir(directory);
3252 if (dir == NULL) return false;
3253
3254 struct dirent *entry;
3255 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtInternal);
3256 bool hasJarFile = false;
3257 while (!hasJarFile && (entry = os::readdir(dir, (dirent *) dbuf)) != NULL) {
3258 const char* name = entry->d_name;
3259 const char* ext = name + strlen(name) - 4;
3260 hasJarFile = ext > name && (os::file_name_strcmp(ext, ".jar") == 0);
3261 }
3262 FREE_C_HEAP_ARRAY(char, dbuf);
3263 os::closedir(dir);
3264 return hasJarFile ;
3265 }
3266
3267 static int check_non_empty_dirs(const char* path) {
3268 const char separator = *os::path_separator();
3269 const char* const end = path + strlen(path);
3270 int nonEmptyDirs = 0;
3271 while (path < end) {
3272 const char* tmp_end = strchr(path, separator);
3273 if (tmp_end == NULL) {
3274 if (has_jar_files(path)) {
3275 nonEmptyDirs++;
3276 jio_fprintf(defaultStream::output_stream(),
3277 "Non-empty directory: %s\n", path);
3278 }
3279 path = end;
3280 } else {
3281 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1, mtInternal);
3282 memcpy(dirpath, path, tmp_end - path);
3283 dirpath[tmp_end - path] = '\0';
3284 if (has_jar_files(dirpath)) {
3285 nonEmptyDirs++;
3286 jio_fprintf(defaultStream::output_stream(),
3287 "Non-empty directory: %s\n", dirpath);
3288 }
3289 FREE_C_HEAP_ARRAY(char, dirpath);
3290 path = tmp_end + 1;
3291 }
3292 }
3293 return nonEmptyDirs;
3294 }
3295
3296 jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) {
3297 // check if the default lib/endorsed directory exists; if so, error
3298 char path[JVM_MAXPATHLEN];
3299 const char* fileSep = os::file_separator();
3300 sprintf(path, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep);
3301
3302 if (CheckEndorsedAndExtDirs) {
3303 int nonEmptyDirs = 0;
3304 // check endorsed directory
3305 nonEmptyDirs += check_non_empty_dirs(path);
3306 // check the extension directories
3307 nonEmptyDirs += check_non_empty_dirs(Arguments::get_ext_dirs());
3308 if (nonEmptyDirs > 0) {
3309 return JNI_ERR;
3310 }
3311 }
3312
3313 DIR* dir = os::opendir(path);
3314 if (dir != NULL) {
3315 jio_fprintf(defaultStream::output_stream(),
3316 "<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n"
3317 "in modular form will be supported via the concept of upgradeable modules.\n");
3318 os::closedir(dir);
3319 return JNI_ERR;
3320 }
3321
3322 sprintf(path, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep);
3323 dir = os::opendir(path);
3324 if (dir != NULL) {
3325 jio_fprintf(defaultStream::output_stream(),
3326 "<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; "
3327 "Use -classpath instead.\n.");
3328 os::closedir(dir);
3329 return JNI_ERR;
3330 }
3331
3332 if (scp_assembly_required) {
3333 // Assemble the bootclasspath elements into the final path.
3334 Arguments::set_sysclasspath(scp_p->combined_path());
3335 }
3336
3337 // This must be done after all arguments have been processed.
3338 // java_compiler() true means set to "NONE" or empty.
3339 if (java_compiler() && !xdebug_mode()) {
3340 // For backwards compatibility, we switch to interpreted mode if
3341 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was
3342 // not specified.
3343 set_mode_flags(_int);
3344 }
3345
3346 // CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode),
3347 // but like -Xint, leave compilation thresholds unaffected.
3348 // With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well.
3349 if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) {
3350 set_mode_flags(_int);
3351 }
3352
3353 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set
3354 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) {
3355 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold);
3356 }
3357
3358 #ifndef COMPILER2
3359 // Don't degrade server performance for footprint
3360 if (FLAG_IS_DEFAULT(UseLargePages) &&
3361 MaxHeapSize < LargePageHeapSizeThreshold) {
3362 // No need for large granularity pages w/small heaps.
3363 // Note that large pages are enabled/disabled for both the
3364 // Java heap and the code cache.
3365 FLAG_SET_DEFAULT(UseLargePages, false);
3366 }
3367
3368 #else
3369 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) {
3370 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1);
3371 }
3372 #endif
3373
3374 #ifndef TIERED
3375 // Tiered compilation is undefined.
3376 UNSUPPORTED_OPTION(TieredCompilation, "TieredCompilation");
3377 #endif
3378
3379 // If we are running in a headless jre, force java.awt.headless property
3380 // to be true unless the property has already been set.
3381 // Also allow the OS environment variable JAVA_AWT_HEADLESS to set headless state.
3382 if (os::is_headless_jre()) {
3383 const char* headless = Arguments::get_property("java.awt.headless");
3384 if (headless == NULL) {
3385 const char *headless_env = ::getenv("JAVA_AWT_HEADLESS");
3386 if (headless_env == NULL) {
3387 if (!add_property("java.awt.headless=true")) {
3388 return JNI_ENOMEM;
3389 }
3390 } else {
3391 char buffer[256];
3392 jio_snprintf(buffer, sizeof(buffer), "java.awt.headless=%s", headless_env);
3393 if (!add_property(buffer)) {
3394 return JNI_ENOMEM;
3395 }
3396 }
3397 }
3398 }
3399
3400 if (UseConcMarkSweepGC && FLAG_IS_DEFAULT(UseParNewGC) && !UseParNewGC) {
3401 // CMS can only be used with ParNew
3402 FLAG_SET_ERGO(bool, UseParNewGC, true);
3403 }
3404
3405 if (!check_vm_args_consistency()) {
3406 return JNI_ERR;
3407 }
3408
3409 return JNI_OK;
3410 }
3411
3412 // Helper class for controlling the lifetime of JavaVMInitArgs
3413 // objects. The contents of the JavaVMInitArgs are guaranteed to be
3414 // deleted on the destruction of the ScopedVMInitArgs object.
3415 class ScopedVMInitArgs : public StackObj {
3416 private:
3417 JavaVMInitArgs _args;
3418
3419 public:
3420 ScopedVMInitArgs() {
3421 _args.version = JNI_VERSION_1_2;
3422 _args.nOptions = 0;
3423 _args.options = NULL;
3424 _args.ignoreUnrecognized = false;
3425 }
3426
3427 // Populates the JavaVMInitArgs object represented by this
3428 // ScopedVMInitArgs object with the arguments in options. The
3429 // allocated memory is deleted by the destructor. If this method
3430 // returns anything other than JNI_OK, then this object is in a
3431 // partially constructed state, and should be abandoned.
3432 jint set_args(GrowableArray<JavaVMOption>* options) {
3433 JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL(
3434 JavaVMOption, options->length(), mtInternal);
3435 if (options_arr == NULL) {
3436 return JNI_ENOMEM;
3437 }
3438 _args.options = options_arr;
3439
3440 for (int i = 0; i < options->length(); i++) {
3441 options_arr[i] = options->at(i);
3442 options_arr[i].optionString = os::strdup(options_arr[i].optionString);
3443 if (options_arr[i].optionString == NULL) {
3444 // Rely on the destructor to do cleanup.
3445 _args.nOptions = i;
3446 return JNI_ENOMEM;
3447 }
3448 }
3449
3450 _args.nOptions = options->length();
3451 _args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions;
3452 return JNI_OK;
3453 }
3454
3455 JavaVMInitArgs* get() { return &_args; }
3456
3457 ~ScopedVMInitArgs() {
3458 if (_args.options == NULL) return;
3459 for (int i = 0; i < _args.nOptions; i++) {
3460 os::free(_args.options[i].optionString);
3461 }
3462 FREE_C_HEAP_ARRAY(JavaVMOption, _args.options);
3463 }
3464 };
3465
3466 jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) {
3467 return parse_options_environment_variable("_JAVA_OPTIONS", args);
3468 }
3469
3470 jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) {
3471 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args);
3472 }
3473
3474 jint Arguments::parse_options_environment_variable(const char* name,
3475 ScopedVMInitArgs* vm_args) {
3476 char *buffer = ::getenv(name);
3477
3478 // Don't check this environment variable if user has special privileges
3479 // (e.g. unix su command).
3480 if (buffer == NULL || os::have_special_privileges()) {
3481 return JNI_OK;
3482 }
3483
3484 if ((buffer = os::strdup(buffer)) == NULL) {
3485 return JNI_ENOMEM;
3486 }
3487
3488 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JavaVMOption>(2, true); // Construct option array
3489 jio_fprintf(defaultStream::error_stream(),
3490 "Picked up %s: %s\n", name, buffer);
3491 char* rd = buffer; // pointer to the input string (rd)
3492 while (true) { // repeat for all options in the input string
3493 while (isspace(*rd)) rd++; // skip whitespace
3494 if (*rd == 0) break; // we re done when the input string is read completely
3495
3496 // The output, option string, overwrites the input string.
3497 // Because of quoting, the pointer to the option string (wrt) may lag the pointer to
3498 // input string (rd).
3499 char* wrt = rd;
3500
3501 JavaVMOption option;
3502 option.optionString = wrt;
3503 options->append(option); // Fill in option
3504 while (*rd != 0 && !isspace(*rd)) { // unquoted strings terminate with a space or NULL
3505 if (*rd == '\'' || *rd == '"') { // handle a quoted string
3506 int quote = *rd; // matching quote to look for
3507 rd++; // don't copy open quote
3508 while (*rd != quote) { // include everything (even spaces) up until quote
3509 if (*rd == 0) { // string termination means unmatched string
3510 jio_fprintf(defaultStream::error_stream(),
3511 "Unmatched quote in %s\n", name);
3512 delete options;
3513 os::free(buffer);
3514 return JNI_ERR;
3515 }
3516 *wrt++ = *rd++; // copy to option string
3517 }
3518 rd++; // don't copy close quote
3519 } else {
3520 *wrt++ = *rd++; // copy to option string
3521 }
3522 }
3523 if (*rd != 0) {
3524 // In this case, the assignment to wrt below will make *rd nul,
3525 // which will interfere with the next loop iteration.
3526 rd++;
3527 }
3528 *wrt = 0; // Zero terminate option
3529 }
3530
3531 // Fill out JavaVMInitArgs structure.
3532 jint status = vm_args->set_args(options);
3533
3534 delete options;
3535 os::free(buffer);
3536 return status;
3537 }
3538
3539 void Arguments::set_shared_spaces_flags() {
3540 if (DumpSharedSpaces) {
3541 if (RequireSharedSpaces) {
3542 warning("cannot dump shared archive while using shared archive");
3543 }
3544 UseSharedSpaces = false;
3545 #ifdef _LP64
3546 if (!UseCompressedOops || !UseCompressedClassPointers) {
3547 vm_exit_during_initialization(
3548 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL);
3549 }
3550 } else {
3551 if (!UseCompressedOops || !UseCompressedClassPointers) {
3552 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces.");
3553 }
3554 #endif
3555 }
3556 }
3557
3558 #if !INCLUDE_ALL_GCS
3559 static void force_serial_gc() {
3560 FLAG_SET_DEFAULT(UseSerialGC, true);
3561 UNSUPPORTED_GC_OPTION(UseG1GC);
3562 UNSUPPORTED_GC_OPTION(UseParallelGC);
3563 UNSUPPORTED_GC_OPTION(UseParallelOldGC);
3564 UNSUPPORTED_GC_OPTION(UseConcMarkSweepGC);
3565 UNSUPPORTED_GC_OPTION(UseParNewGC);
3566 }
3567 #endif // INCLUDE_ALL_GCS
3568
3569 // Sharing support
3570 // Construct the path to the archive
3571 static char* get_shared_archive_path() {
3572 char *shared_archive_path;
3573 if (SharedArchiveFile == NULL) {
3574 char jvm_path[JVM_MAXPATHLEN];
3575 os::jvm_path(jvm_path, sizeof(jvm_path));
3576 char *end = strrchr(jvm_path, *os::file_separator());
3577 if (end != NULL) *end = '\0';
3578 size_t jvm_path_len = strlen(jvm_path);
3579 size_t file_sep_len = strlen(os::file_separator());
3580 const size_t len = jvm_path_len + file_sep_len + 20;
3581 shared_archive_path = NEW_C_HEAP_ARRAY(char, len, mtInternal);
3582 if (shared_archive_path != NULL) {
3583 jio_snprintf(shared_archive_path, len, "%s%sclasses.jsa",
3584 jvm_path, os::file_separator());
3585 }
3586 } else {
3587 shared_archive_path = os::strdup_check_oom(SharedArchiveFile, mtInternal);
3588 }
3589 return shared_archive_path;
3590 }
3591
3592 #ifndef PRODUCT
3593 // Determine whether LogVMOutput should be implicitly turned on.
3594 static bool use_vm_log() {
3595 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) ||
3596 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods ||
3597 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers ||
3598 PrintAssembly || TraceDeoptimization || TraceDependencies ||
3599 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) {
3600 return true;
3601 }
3602
3603 #ifdef COMPILER1
3604 if (PrintC1Statistics) {
3605 return true;
3606 }
3607 #endif // COMPILER1
3608
3609 #ifdef COMPILER2
3610 if (PrintOptoAssembly || PrintOptoStatistics) {
3611 return true;
3612 }
3613 #endif // COMPILER2
3614
3615 return false;
3616 }
3617 #endif // PRODUCT
3618
3619 static jint match_special_option_and_act(const JavaVMInitArgs* args,
3620 char** flags_file) {
3621 // Remaining part of option string
3622 const char* tail;
3623
3624 for (int index = 0; index < args->nOptions; index++) {
3625 const JavaVMOption* option = args->options + index;
3626 if (ArgumentsExt::process_options(option)) {
3627 continue;
3628 }
3629 if (match_option(option, "-XX:Flags=", &tail)) {
3630 *flags_file = (char *) tail;
3631 continue;
3632 }
3633 if (match_option(option, "-XX:+PrintVMOptions")) {
3634 PrintVMOptions = true;
3635 continue;
3636 }
3637 if (match_option(option, "-XX:-PrintVMOptions")) {
3638 PrintVMOptions = false;
3639 continue;
3640 }
3641 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) {
3642 IgnoreUnrecognizedVMOptions = true;
3643 continue;
3644 }
3645 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) {
3646 IgnoreUnrecognizedVMOptions = false;
3647 continue;
3648 }
3649 if (match_option(option, "-XX:+PrintFlagsInitial")) {
3650 CommandLineFlags::printFlags(tty, false);
3651 vm_exit(0);
3652 }
3653 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) {
3654 #if INCLUDE_NMT
3655 // The launcher did not setup nmt environment variable properly.
3656 if (!MemTracker::check_launcher_nmt_support(tail)) {
3657 warning("Native Memory Tracking did not setup properly, using wrong launcher?");
3658 }
3659
3660 // Verify if nmt option is valid.
3661 if (MemTracker::verify_nmt_option()) {
3662 // Late initialization, still in single-threaded mode.
3663 if (MemTracker::tracking_level() >= NMT_summary) {
3664 MemTracker::init();
3665 }
3666 } else {
3667 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL);
3668 }
3669 continue;
3670 #else
3671 jio_fprintf(defaultStream::error_stream(),
3672 "Native Memory Tracking is not supported in this VM\n");
3673 return JNI_ERR;
3674 #endif
3675 }
3676
3677 #ifndef PRODUCT
3678 if (match_option(option, "-XX:+PrintFlagsWithComments")) {
3679 CommandLineFlags::printFlags(tty, true);
3680 vm_exit(0);
3681 }
3682 #endif
3683 }
3684 return JNI_OK;
3685 }
3686
3687 static void print_options(const JavaVMInitArgs *args) {
3688 const char* tail;
3689 for (int index = 0; index < args->nOptions; index++) {
3690 const JavaVMOption *option = args->options + index;
3691 if (match_option(option, "-XX:", &tail)) {
3692 logOption(tail);
3693 }
3694 }
3695 }
3696
3697 // Parse entry point called from JNI_CreateJavaVM
3698
3699 jint Arguments::parse(const JavaVMInitArgs* args) {
3700
3701 // Initialize ranges and constraints
3702 CommandLineFlagRangeList::init();
3703 CommandLineFlagConstraintList::init();
3704
3705 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed.
3706 const char* hotspotrc = ".hotspotrc";
3707 char* flags_file = NULL;
3708 bool settings_file_specified = false;
3709 bool needs_hotspotrc_warning = false;
3710 ScopedVMInitArgs java_tool_options_args;
3711 ScopedVMInitArgs java_options_args;
3712
3713 jint code =
3714 parse_java_tool_options_environment_variable(&java_tool_options_args);
3715 if (code != JNI_OK) {
3716 return code;
3717 }
3718
3719 code = parse_java_options_environment_variable(&java_options_args);
3720 if (code != JNI_OK) {
3721 return code;
3722 }
3723
3724 code =
3725 match_special_option_and_act(java_tool_options_args.get(), &flags_file);
3726 if (code != JNI_OK) {
3727 return code;
3728 }
3729
3730 code = match_special_option_and_act(args, &flags_file);
3731 if (code != JNI_OK) {
3732 return code;
3733 }
3734
3735 code = match_special_option_and_act(java_options_args.get(), &flags_file);
3736 if (code != JNI_OK) {
3737 return code;
3738 }
3739
3740 settings_file_specified = (flags_file != NULL);
3741
3742 if (IgnoreUnrecognizedVMOptions) {
3743 // uncast const to modify the flag args->ignoreUnrecognized
3744 *(jboolean*)(&args->ignoreUnrecognized) = true;
3745 java_tool_options_args.get()->ignoreUnrecognized = true;
3746 java_options_args.get()->ignoreUnrecognized = true;
3747 }
3748
3749 // Parse specified settings file
3750 if (settings_file_specified) {
3751 if (!process_settings_file(flags_file, true, args->ignoreUnrecognized)) {
3752 return JNI_EINVAL;
3753 }
3754 } else {
3755 #ifdef ASSERT
3756 // Parse default .hotspotrc settings file
3757 if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) {
3758 return JNI_EINVAL;
3759 }
3760 #else
3761 struct stat buf;
3762 if (os::stat(hotspotrc, &buf) == 0) {
3763 needs_hotspotrc_warning = true;
3764 }
3765 #endif
3766 }
3767
3768 if (PrintVMOptions) {
3769 print_options(java_tool_options_args.get());
3770 print_options(args);
3771 print_options(java_options_args.get());
3772 }
3773
3774 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS
3775 jint result = parse_vm_init_args(java_tool_options_args.get(),
3776 java_options_args.get(), args);
3777
3778 if (result != JNI_OK) {
3779 return result;
3780 }
3781
3782 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed.
3783 SharedArchivePath = get_shared_archive_path();
3784 if (SharedArchivePath == NULL) {
3785 return JNI_ENOMEM;
3786 }
3787
3788 // Set up VerifySharedSpaces
3789 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) {
3790 VerifySharedSpaces = true;
3791 }
3792
3793 // Delay warning until here so that we've had a chance to process
3794 // the -XX:-PrintWarnings flag
3795 if (needs_hotspotrc_warning) {
3796 warning("%s file is present but has been ignored. "
3797 "Run with -XX:Flags=%s to load the file.",
3798 hotspotrc, hotspotrc);
3799 }
3800
3801 #if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
3802 UNSUPPORTED_OPTION(UseLargePages, "-XX:+UseLargePages");
3803 #endif
3804
3805 ArgumentsExt::report_unsupported_options();
3806
3807 #ifndef PRODUCT
3808 if (TraceBytecodesAt != 0) {
3809 TraceBytecodes = true;
3810 }
3811 if (CountCompiledCalls) {
3812 if (UseCounterDecay) {
3813 warning("UseCounterDecay disabled because CountCalls is set");
3814 UseCounterDecay = false;
3815 }
3816 }
3817 #endif // PRODUCT
3818
3819 if (ScavengeRootsInCode == 0) {
3820 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) {
3821 warning("forcing ScavengeRootsInCode non-zero");
3822 }
3823 ScavengeRootsInCode = 1;
3824 }
3825
3826 if (PrintGCDetails) {
3827 // Turn on -verbose:gc options as well
3828 PrintGC = true;
3829 }
3830
3831 // Set object alignment values.
3832 set_object_alignment();
3833
3834 #if !INCLUDE_ALL_GCS
3835 force_serial_gc();
3836 #endif // INCLUDE_ALL_GCS
3837 #if !INCLUDE_CDS
3838 if (DumpSharedSpaces || RequireSharedSpaces) {
3839 jio_fprintf(defaultStream::error_stream(),
3840 "Shared spaces are not supported in this VM\n");
3841 return JNI_ERR;
3842 }
3843 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) || PrintSharedSpaces) {
3844 warning("Shared spaces are not supported in this VM");
3845 FLAG_SET_DEFAULT(UseSharedSpaces, false);
3846 FLAG_SET_DEFAULT(PrintSharedSpaces, false);
3847 }
3848 no_shared_spaces("CDS Disabled");
3849 #endif // INCLUDE_CDS
3850
3851 return JNI_OK;
3852 }
3853
3854 jint Arguments::apply_ergo() {
3855
3856 // Set flags based on ergonomics.
3857 set_ergonomics_flags();
3858
3859 set_shared_spaces_flags();
3860
3861 // Check the GC selections again.
3862 if (!check_gc_consistency()) {
3863 return JNI_EINVAL;
3864 }
3865
3866 if (TieredCompilation) {
3867 set_tiered_flags();
3868 } else {
3869 int max_compilation_policy_choice = 1;
3870 #ifdef COMPILER2
3871 max_compilation_policy_choice = 2;
3872 #endif
3873 // Check if the policy is valid.
3874 if (CompilationPolicyChoice >= max_compilation_policy_choice) {
3875 vm_exit_during_initialization(
3876 "Incompatible compilation policy selected", NULL);
3877 }
3878 // Scale CompileThreshold
3879 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves CompileThreshold unchanged.
3880 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
3881 FLAG_SET_ERGO(intx, CompileThreshold, scaled_compile_threshold(CompileThreshold));
3882 }
3883 }
3884
3885 #ifdef COMPILER2
3886 #ifndef PRODUCT
3887 if (PrintIdealGraphLevel > 0) {
3888 FLAG_SET_ERGO(bool, PrintIdealGraph, true);
3889 }
3890 #endif
3891 #endif
3892
3893 // Set heap size based on available physical memory
3894 set_heap_size();
3895
3896 ArgumentsExt::set_gc_specific_flags();
3897
3898 // Initialize Metaspace flags and alignments
3899 Metaspace::ergo_initialize();
3900
3901 // Set bytecode rewriting flags
3902 set_bytecode_flags();
3903
3904 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled
3905 set_aggressive_opts_flags();
3906
3907 // Turn off biased locking for locking debug mode flags,
3908 // which are subtly different from each other but neither works with
3909 // biased locking
3910 if (UseHeavyMonitors
3911 #ifdef COMPILER1
3912 || !UseFastLocking
3913 #endif // COMPILER1
3914 ) {
3915 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) {
3916 // flag set to true on command line; warn the user that they
3917 // can't enable biased locking here
3918 warning("Biased Locking is not supported with locking debug flags"
3919 "; ignoring UseBiasedLocking flag." );
3920 }
3921 UseBiasedLocking = false;
3922 }
3923
3924 #ifdef ZERO
3925 // Clear flags not supported on zero.
3926 FLAG_SET_DEFAULT(ProfileInterpreter, false);
3927 FLAG_SET_DEFAULT(UseBiasedLocking, false);
3928 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false));
3929 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false));
3930 #endif // CC_INTERP
3931
3932 #ifdef COMPILER2
3933 if (!EliminateLocks) {
3934 EliminateNestedLocks = false;
3935 }
3936 if (!Inline) {
3937 IncrementalInline = false;
3938 }
3939 #ifndef PRODUCT
3940 if (!IncrementalInline) {
3941 AlwaysIncrementalInline = false;
3942 }
3943 #endif
3944 if (!UseTypeSpeculation && FLAG_IS_DEFAULT(TypeProfileLevel)) {
3945 // nothing to use the profiling, turn if off
3946 FLAG_SET_DEFAULT(TypeProfileLevel, 0);
3947 }
3948 #endif
3949
3950 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) {
3951 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output");
3952 DebugNonSafepoints = true;
3953 }
3954
3955 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) {
3956 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used");
3957 }
3958
3959 #ifndef PRODUCT
3960 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) {
3961 if (use_vm_log()) {
3962 LogVMOutput = true;
3963 }
3964 }
3965 #endif // PRODUCT
3966
3967 if (PrintCommandLineFlags) {
3968 CommandLineFlags::printSetFlags(tty);
3969 }
3970
3971 // Apply CPU specific policy for the BiasedLocking
3972 if (UseBiasedLocking) {
3973 if (!VM_Version::use_biased_locking() &&
3974 !(FLAG_IS_CMDLINE(UseBiasedLocking))) {
3975 UseBiasedLocking = false;
3976 }
3977 }
3978 #ifdef COMPILER2
3979 if (!UseBiasedLocking || EmitSync != 0) {
3980 UseOptoBiasInlining = false;
3981 }
3982 #endif
3983
3984 #ifndef THREAD_LOCAL_SAFEPOINT_SUPPORT
3985 if (ThreadLocalSafepoints) {
3986 ThreadLocalSafepoints = false;
3987 jio_fprintf(defaultStream::error_stream(),
3988 "ThreadLocalSafepoints is not supported on this platform\n");
3989
3990 }
3991 #endif
3992
3993 return JNI_OK;
3994 }
3995
3996 jint Arguments::adjust_after_os() {
3997 if (UseNUMA) {
3998 if (UseParallelGC || UseParallelOldGC) {
3999 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) {
4000 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M);
4001 }
4002 }
4003 // UseNUMAInterleaving is set to ON for all collectors and
4004 // platforms when UseNUMA is set to ON. NUMA-aware collectors
4005 // such as the parallel collector for Linux and Solaris will
4006 // interleave old gen and survivor spaces on top of NUMA
4007 // allocation policy for the eden space.
4008 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on
4009 // all platforms and ParallelGC on Windows will interleave all
4010 // of the heap spaces across NUMA nodes.
4011 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) {
4012 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true);
4013 }
4014 }
4015 return JNI_OK;
4016 }
4017
4018 // Any custom code post the 'CommandLineFlagConstraint::AfterErgo' constraint check
4019 // can be done here. We pass a flag that specifies whether
4020 // the check passed successfully
4021 void Arguments::post_after_ergo_constraint_check(bool check_passed) {
4022 // This does not set the flag itself, but stores the value in a safe place for later usage.
4023 _min_heap_free_ratio = MinHeapFreeRatio;
4024 _max_heap_free_ratio = MaxHeapFreeRatio;
4025 }
4026
4027 int Arguments::PropertyList_count(SystemProperty* pl) {
4028 int count = 0;
4029 while(pl != NULL) {
4030 count++;
4031 pl = pl->next();
4032 }
4033 return count;
4034 }
4035
4036 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) {
4037 assert(key != NULL, "just checking");
4038 SystemProperty* prop;
4039 for (prop = pl; prop != NULL; prop = prop->next()) {
4040 if (strcmp(key, prop->key()) == 0) return prop->value();
4041 }
4042 return NULL;
4043 }
4044
4045 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) {
4046 int count = 0;
4047 const char* ret_val = NULL;
4048
4049 while(pl != NULL) {
4050 if(count >= index) {
4051 ret_val = pl->key();
4052 break;
4053 }
4054 count++;
4055 pl = pl->next();
4056 }
4057
4058 return ret_val;
4059 }
4060
4061 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) {
4062 int count = 0;
4063 char* ret_val = NULL;
4064
4065 while(pl != NULL) {
4066 if(count >= index) {
4067 ret_val = pl->value();
4068 break;
4069 }
4070 count++;
4071 pl = pl->next();
4072 }
4073
4074 return ret_val;
4075 }
4076
4077 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) {
4078 SystemProperty* p = *plist;
4079 if (p == NULL) {
4080 *plist = new_p;
4081 } else {
4082 while (p->next() != NULL) {
4083 p = p->next();
4084 }
4085 p->set_next(new_p);
4086 }
4087 }
4088
4089 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, char* v) {
4090 if (plist == NULL)
4091 return;
4092
4093 SystemProperty* new_p = new SystemProperty(k, v, true);
4094 PropertyList_add(plist, new_p);
4095 }
4096
4097 void Arguments::PropertyList_add(SystemProperty *element) {
4098 PropertyList_add(&_system_properties, element);
4099 }
4100
4101 // This add maintains unique property key in the list.
4102 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, char* v, jboolean append) {
4103 if (plist == NULL)
4104 return;
4105
4106 // If property key exist then update with new value.
4107 SystemProperty* prop;
4108 for (prop = *plist; prop != NULL; prop = prop->next()) {
4109 if (strcmp(k, prop->key()) == 0) {
4110 if (append) {
4111 prop->append_value(v);
4112 } else {
4113 prop->set_value(v);
4114 }
4115 return;
4116 }
4117 }
4118
4119 PropertyList_add(plist, k, v);
4120 }
4121
4122 // Copies src into buf, replacing "%%" with "%" and "%p" with pid
4123 // Returns true if all of the source pointed by src has been copied over to
4124 // the destination buffer pointed by buf. Otherwise, returns false.
4125 // Notes:
4126 // 1. If the length (buflen) of the destination buffer excluding the
4127 // NULL terminator character is not long enough for holding the expanded
4128 // pid characters, it also returns false instead of returning the partially
4129 // expanded one.
4130 // 2. The passed in "buflen" should be large enough to hold the null terminator.
4131 bool Arguments::copy_expand_pid(const char* src, size_t srclen,
4132 char* buf, size_t buflen) {
4133 const char* p = src;
4134 char* b = buf;
4135 const char* src_end = &src[srclen];
4136 char* buf_end = &buf[buflen - 1];
4137
4138 while (p < src_end && b < buf_end) {
4139 if (*p == '%') {
4140 switch (*(++p)) {
4141 case '%': // "%%" ==> "%"
4142 *b++ = *p++;
4143 break;
4144 case 'p': { // "%p" ==> current process id
4145 // buf_end points to the character before the last character so
4146 // that we could write '\0' to the end of the buffer.
4147 size_t buf_sz = buf_end - b + 1;
4148 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id());
4149
4150 // if jio_snprintf fails or the buffer is not long enough to hold
4151 // the expanded pid, returns false.
4152 if (ret < 0 || ret >= (int)buf_sz) {
4153 return false;
4154 } else {
4155 b += ret;
4156 assert(*b == '\0', "fail in copy_expand_pid");
4157 if (p == src_end && b == buf_end + 1) {
4158 // reach the end of the buffer.
4159 return true;
4160 }
4161 }
4162 p++;
4163 break;
4164 }
4165 default :
4166 *b++ = '%';
4167 }
4168 } else {
4169 *b++ = *p++;
4170 }
4171 }
4172 *b = '\0';
4173 return (p == src_end); // return false if not all of the source was copied
4174 }