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