1 /*
2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classLoader.hpp"
27 #include "classfile/javaAssertions.hpp"
28 #include "classfile/stringTable.hpp"
29 #include "classfile/symbolTable.hpp"
30 #include "code/codeCacheExtensions.hpp"
31 #include "compiler/compilerOracle.hpp"
32 #include "gc/shared/cardTableRS.hpp"
33 #include "gc/shared/genCollectedHeap.hpp"
34 #include "gc/shared/referenceProcessor.hpp"
35 #include "gc/shared/taskqueue.hpp"
36 #include "memory/allocation.inline.hpp"
37 #include "memory/universe.inline.hpp"
38 #include "oops/oop.inline.hpp"
39 #include "prims/jvmtiExport.hpp"
40 #include "runtime/arguments.hpp"
41 #include "runtime/arguments_ext.hpp"
42 #include "runtime/commandLineFlagConstraintList.hpp"
43 #include "runtime/commandLineFlagRangeList.hpp"
44 #include "runtime/globals.hpp"
45 #include "runtime/globals_extension.hpp"
46 #include "runtime/java.hpp"
47 #include "runtime/os.hpp"
48 #include "runtime/vm_version.hpp"
49 #include "services/management.hpp"
50 #include "services/memTracker.hpp"
51 #include "utilities/defaultStream.hpp"
52 #include "utilities/macros.hpp"
53 #include "utilities/stringUtils.hpp"
54 #if INCLUDE_ALL_GCS
55 #include "gc/cms/compactibleFreeListSpace.hpp"
56 #include "gc/g1/g1CollectedHeap.inline.hpp"
57 #include "gc/parallel/parallelScavengeHeap.hpp"
58 #endif // INCLUDE_ALL_GCS
59
60 // Note: This is a special bug reporting site for the JVM
61 #define DEFAULT_VENDOR_URL_BUG "http://bugreport.java.com/bugreport/crash.jsp"
62 #define DEFAULT_JAVA_LAUNCHER "generic"
63
64 #define UNSUPPORTED_GC_OPTION(gc) \
65 do { \
66 if (gc) { \
67 if (FLAG_IS_CMDLINE(gc)) { \
68 warning(#gc " is not supported in this VM. Using Serial GC."); \
69 } \
70 FLAG_SET_DEFAULT(gc, false); \
71 } \
72 } while(0)
73
74 char** Arguments::_jvm_flags_array = NULL;
75 int Arguments::_num_jvm_flags = 0;
76 char** Arguments::_jvm_args_array = NULL;
77 int Arguments::_num_jvm_args = 0;
78 char* Arguments::_java_command = NULL;
79 SystemProperty* Arguments::_system_properties = NULL;
80 const char* Arguments::_gc_log_filename = NULL;
81 bool Arguments::_has_profile = false;
82 size_t Arguments::_conservative_max_heap_alignment = 0;
83 size_t Arguments::_min_heap_size = 0;
84 Arguments::Mode Arguments::_mode = _mixed;
85 bool Arguments::_java_compiler = false;
86 bool Arguments::_xdebug_mode = false;
87 const char* Arguments::_java_vendor_url_bug = DEFAULT_VENDOR_URL_BUG;
88 const char* Arguments::_sun_java_launcher = DEFAULT_JAVA_LAUNCHER;
89 int Arguments::_sun_java_launcher_pid = -1;
90 bool Arguments::_sun_java_launcher_is_altjvm = false;
91
92 // These parameters are reset in method parse_vm_init_args()
93 bool Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
94 bool Arguments::_UseOnStackReplacement = UseOnStackReplacement;
95 bool Arguments::_BackgroundCompilation = BackgroundCompilation;
96 bool Arguments::_ClipInlining = ClipInlining;
97 intx Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
98 intx Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
99
100 char* Arguments::SharedArchivePath = NULL;
101
102 AgentLibraryList Arguments::_libraryList;
103 AgentLibraryList Arguments::_agentList;
104
105 abort_hook_t Arguments::_abort_hook = NULL;
106 exit_hook_t Arguments::_exit_hook = NULL;
107 vfprintf_hook_t Arguments::_vfprintf_hook = NULL;
108
109
110 SystemProperty *Arguments::_sun_boot_library_path = NULL;
111 SystemProperty *Arguments::_java_library_path = NULL;
112 SystemProperty *Arguments::_java_home = NULL;
113 SystemProperty *Arguments::_java_class_path = NULL;
114 SystemProperty *Arguments::_sun_boot_class_path = NULL;
115
116 char* Arguments::_ext_dirs = NULL;
117
118 // Check if head of 'option' matches 'name', and sets 'tail' to the remaining
119 // part of the option string.
120 static bool match_option(const JavaVMOption *option, const char* name,
121 const char** tail) {
122 int len = (int)strlen(name);
123 if (strncmp(option->optionString, name, len) == 0) {
124 *tail = option->optionString + len;
125 return true;
126 } else {
127 return false;
128 }
129 }
130
131 // Check if 'option' matches 'name'. No "tail" is allowed.
132 static bool match_option(const JavaVMOption *option, const char* name) {
133 const char* tail = NULL;
134 bool result = match_option(option, name, &tail);
135 if (tail != NULL && *tail == '\0') {
136 return result;
137 } else {
138 return false;
139 }
140 }
141
142 // Return true if any of the strings in null-terminated array 'names' matches.
143 // If tail_allowed is true, then the tail must begin with a colon; otherwise,
144 // the option must match exactly.
145 static bool match_option(const JavaVMOption* option, const char** names, const char** tail,
146 bool tail_allowed) {
147 for (/* empty */; *names != NULL; ++names) {
148 if (match_option(option, *names, tail)) {
149 if (**tail == '\0' || tail_allowed && **tail == ':') {
150 return true;
151 }
152 }
153 }
154 return false;
155 }
156
157 static void logOption(const char* opt) {
158 if (PrintVMOptions) {
159 jio_fprintf(defaultStream::output_stream(), "VM option '%s'\n", opt);
160 }
161 }
162
163 // Process java launcher properties.
164 void Arguments::process_sun_java_launcher_properties(JavaVMInitArgs* args) {
165 // See if sun.java.launcher, sun.java.launcher.is_altjvm or
166 // sun.java.launcher.pid is defined.
167 // Must do this before setting up other system properties,
168 // as some of them may depend on launcher type.
169 for (int index = 0; index < args->nOptions; index++) {
170 const JavaVMOption* option = args->options + index;
171 const char* tail;
172
173 if (match_option(option, "-Dsun.java.launcher=", &tail)) {
174 process_java_launcher_argument(tail, option->extraInfo);
175 continue;
176 }
177 if (match_option(option, "-Dsun.java.launcher.is_altjvm=", &tail)) {
178 if (strcmp(tail, "true") == 0) {
179 _sun_java_launcher_is_altjvm = true;
180 }
181 continue;
182 }
183 if (match_option(option, "-Dsun.java.launcher.pid=", &tail)) {
184 _sun_java_launcher_pid = atoi(tail);
185 continue;
186 }
187 }
188 }
189
190 // Initialize system properties key and value.
191 void Arguments::init_system_properties() {
192 PropertyList_add(&_system_properties, new SystemProperty("java.vm.specification.name",
193 "Java Virtual Machine Specification", false));
194 PropertyList_add(&_system_properties, new SystemProperty("java.vm.version", VM_Version::vm_release(), false));
195 PropertyList_add(&_system_properties, new SystemProperty("java.vm.name", VM_Version::vm_name(), false));
196 PropertyList_add(&_system_properties, new SystemProperty("java.vm.info", VM_Version::vm_info_string(), true));
197
198 // Following are JVMTI agent writable properties.
199 // Properties values are set to NULL and they are
200 // os specific they are initialized in os::init_system_properties_values().
201 _sun_boot_library_path = new SystemProperty("sun.boot.library.path", NULL, true);
202 _java_library_path = new SystemProperty("java.library.path", NULL, true);
203 _java_home = new SystemProperty("java.home", NULL, true);
204 _sun_boot_class_path = new SystemProperty("sun.boot.class.path", NULL, true);
205
206 _java_class_path = new SystemProperty("java.class.path", "", true);
207
208 // Add to System Property list.
209 PropertyList_add(&_system_properties, _sun_boot_library_path);
210 PropertyList_add(&_system_properties, _java_library_path);
211 PropertyList_add(&_system_properties, _java_home);
212 PropertyList_add(&_system_properties, _java_class_path);
213 PropertyList_add(&_system_properties, _sun_boot_class_path);
214
215 // Set OS specific system properties values
216 os::init_system_properties_values();
217 }
218
219 // Update/Initialize System properties after JDK version number is known
220 void Arguments::init_version_specific_system_properties() {
221 enum { bufsz = 16 };
222 char buffer[bufsz];
223 const char* spec_vendor = "Sun Microsystems Inc.";
224 uint32_t spec_version = 0;
225
226 spec_vendor = "Oracle Corporation";
227 spec_version = JDK_Version::current().major_version();
228 jio_snprintf(buffer, bufsz, "1." UINT32_FORMAT, spec_version);
229
230 PropertyList_add(&_system_properties,
231 new SystemProperty("java.vm.specification.vendor", spec_vendor, false));
232 PropertyList_add(&_system_properties,
233 new SystemProperty("java.vm.specification.version", buffer, false));
234 PropertyList_add(&_system_properties,
235 new SystemProperty("java.vm.vendor", VM_Version::vm_vendor(), false));
236 }
237
238 /**
239 * Provide a slightly more user-friendly way of eliminating -XX flags.
240 * When a flag is eliminated, it can be added to this list in order to
241 * continue accepting this flag on the command-line, while issuing a warning
242 * and ignoring the value. Once the JDK version reaches the 'accept_until'
243 * limit, we flatly refuse to admit the existence of the flag. This allows
244 * a flag to die correctly over JDK releases using HSX.
245 * But now that HSX is no longer supported only options with a future
246 * accept_until value need to be listed, and the list can be pruned
247 * on each major release.
248 */
249 typedef struct {
250 const char* name;
251 JDK_Version obsoleted_in; // when the flag went away
252 JDK_Version accept_until; // which version to start denying the existence
253 } ObsoleteFlag;
254
255 static ObsoleteFlag obsolete_jvm_flags[] = {
256 { "UseOldInlining", JDK_Version::jdk(9), JDK_Version::jdk(10) },
257 { "SafepointPollOffset", JDK_Version::jdk(9), JDK_Version::jdk(10) },
258 { "UseBoundThreads", JDK_Version::jdk(9), JDK_Version::jdk(10) },
259 { "DefaultThreadPriority", JDK_Version::jdk(9), JDK_Version::jdk(10) },
260 { "NoYieldsInMicrolock", JDK_Version::jdk(9), JDK_Version::jdk(10) },
261 { "BackEdgeThreshold", JDK_Version::jdk(9), JDK_Version::jdk(10) },
262 { "UseNewReflection", JDK_Version::jdk(9), JDK_Version::jdk(10) },
263 { "ReflectionWrapResolutionErrors",JDK_Version::jdk(9), JDK_Version::jdk(10) },
264 { "VerifyReflectionBytecodes", JDK_Version::jdk(9), JDK_Version::jdk(10) },
265 { "AutoShutdownNMT", JDK_Version::jdk(9), JDK_Version::jdk(10) },
266 { "NmethodSweepFraction", JDK_Version::jdk(9), JDK_Version::jdk(10) },
267 { "NmethodSweepCheckInterval", JDK_Version::jdk(9), JDK_Version::jdk(10) },
268 { "CodeCacheMinimumFreeSpace", JDK_Version::jdk(9), JDK_Version::jdk(10) },
269 #ifndef ZERO
270 { "UseFastAccessorMethods", JDK_Version::jdk(9), JDK_Version::jdk(10) },
271 { "UseFastEmptyMethods", JDK_Version::jdk(9), JDK_Version::jdk(10) },
272 #endif // ZERO
273 { "UseCompilerSafepoints", JDK_Version::jdk(9), JDK_Version::jdk(10) },
274 { "AdaptiveSizePausePolicy", JDK_Version::jdk(9), JDK_Version::jdk(10) },
275 { "ParallelGCRetainPLAB", JDK_Version::jdk(9), JDK_Version::jdk(10) },
276 { "ThreadSafetyMargin", JDK_Version::jdk(9), JDK_Version::jdk(10) },
277 { "LazyBootClassLoader", JDK_Version::jdk(9), JDK_Version::jdk(10) },
278 { "StarvationMonitorInterval", JDK_Version::jdk(9), JDK_Version::jdk(10) },
279 { "PreInflateSpin", JDK_Version::jdk(9), JDK_Version::jdk(10) },
280 { NULL, JDK_Version(0), JDK_Version(0) }
281 };
282
283 // Returns true if the flag is obsolete and fits into the range specified
284 // for being ignored. In the case that the flag is ignored, the 'version'
285 // value is filled in with the version number when the flag became
286 // obsolete so that that value can be displayed to the user.
287 bool Arguments::is_newly_obsolete(const char *s, JDK_Version* version) {
288 int i = 0;
289 assert(version != NULL, "Must provide a version buffer");
290 while (obsolete_jvm_flags[i].name != NULL) {
291 const ObsoleteFlag& flag_status = obsolete_jvm_flags[i];
292 // <flag>=xxx form
293 // [-|+]<flag> form
294 size_t len = strlen(flag_status.name);
295 if ((strncmp(flag_status.name, s, len) == 0) &&
296 (strlen(s) == len)){
297 if (JDK_Version::current().compare(flag_status.accept_until) == -1) {
298 *version = flag_status.obsoleted_in;
299 return true;
300 }
301 }
302 i++;
303 }
304 return false;
305 }
306
307 // Constructs the system class path (aka boot class path) from the following
308 // components, in order:
309 //
310 // prefix // from -Xbootclasspath/p:...
311 // base // from os::get_system_properties() or -Xbootclasspath=
312 // suffix // from -Xbootclasspath/a:...
313 //
314 // This could be AllStatic, but it isn't needed after argument processing is
315 // complete.
316 class SysClassPath: public StackObj {
317 public:
318 SysClassPath(const char* base);
319 ~SysClassPath();
320
321 inline void set_base(const char* base);
322 inline void add_prefix(const char* prefix);
323 inline void add_suffix_to_prefix(const char* suffix);
324 inline void add_suffix(const char* suffix);
325 inline void reset_path(const char* base);
326
327 inline const char* get_base() const { return _items[_scp_base]; }
328 inline const char* get_prefix() const { return _items[_scp_prefix]; }
329 inline const char* get_suffix() const { return _items[_scp_suffix]; }
330
331 // Combine all the components into a single c-heap-allocated string; caller
332 // must free the string if/when no longer needed.
333 char* combined_path();
334
335 private:
336 // Utility routines.
337 static char* add_to_path(const char* path, const char* str, bool prepend);
338 static char* add_jars_to_path(char* path, const char* directory);
339
340 inline void reset_item_at(int index);
341
342 // Array indices for the items that make up the sysclasspath. All except the
343 // base are allocated in the C heap and freed by this class.
344 enum {
345 _scp_prefix, // from -Xbootclasspath/p:...
346 _scp_base, // the default sysclasspath
347 _scp_suffix, // from -Xbootclasspath/a:...
348 _scp_nitems // the number of items, must be last.
349 };
350
351 const char* _items[_scp_nitems];
352 };
353
354 SysClassPath::SysClassPath(const char* base) {
355 memset(_items, 0, sizeof(_items));
356 _items[_scp_base] = base;
357 }
358
359 SysClassPath::~SysClassPath() {
360 // Free everything except the base.
361 for (int i = 0; i < _scp_nitems; ++i) {
362 if (i != _scp_base) reset_item_at(i);
363 }
364 }
365
366 inline void SysClassPath::set_base(const char* base) {
367 _items[_scp_base] = base;
368 }
369
370 inline void SysClassPath::add_prefix(const char* prefix) {
371 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], prefix, true);
372 }
373
374 inline void SysClassPath::add_suffix_to_prefix(const char* suffix) {
375 _items[_scp_prefix] = add_to_path(_items[_scp_prefix], suffix, false);
376 }
377
378 inline void SysClassPath::add_suffix(const char* suffix) {
379 _items[_scp_suffix] = add_to_path(_items[_scp_suffix], suffix, false);
380 }
381
382 inline void SysClassPath::reset_item_at(int index) {
383 assert(index < _scp_nitems && index != _scp_base, "just checking");
384 if (_items[index] != NULL) {
385 FREE_C_HEAP_ARRAY(char, _items[index]);
386 _items[index] = NULL;
387 }
388 }
389
390 inline void SysClassPath::reset_path(const char* base) {
391 // Clear the prefix and suffix.
392 reset_item_at(_scp_prefix);
393 reset_item_at(_scp_suffix);
394 set_base(base);
395 }
396
397 //------------------------------------------------------------------------------
398
399
400 // Combine the bootclasspath elements, some of which may be null, into a single
401 // c-heap-allocated string.
402 char* SysClassPath::combined_path() {
403 assert(_items[_scp_base] != NULL, "empty default sysclasspath");
404
405 size_t lengths[_scp_nitems];
406 size_t total_len = 0;
407
408 const char separator = *os::path_separator();
409
410 // Get the lengths.
411 int i;
412 for (i = 0; i < _scp_nitems; ++i) {
413 if (_items[i] != NULL) {
414 lengths[i] = strlen(_items[i]);
415 // Include space for the separator char (or a NULL for the last item).
416 total_len += lengths[i] + 1;
417 }
418 }
419 assert(total_len > 0, "empty sysclasspath not allowed");
420
421 // Copy the _items to a single string.
422 char* cp = NEW_C_HEAP_ARRAY(char, total_len, mtInternal);
423 char* cp_tmp = cp;
424 for (i = 0; i < _scp_nitems; ++i) {
425 if (_items[i] != NULL) {
426 memcpy(cp_tmp, _items[i], lengths[i]);
427 cp_tmp += lengths[i];
428 *cp_tmp++ = separator;
429 }
430 }
431 *--cp_tmp = '\0'; // Replace the extra separator.
432 return cp;
433 }
434
435 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null.
436 char*
437 SysClassPath::add_to_path(const char* path, const char* str, bool prepend) {
438 char *cp;
439
440 assert(str != NULL, "just checking");
441 if (path == NULL) {
442 size_t len = strlen(str) + 1;
443 cp = NEW_C_HEAP_ARRAY(char, len, mtInternal);
444 memcpy(cp, str, len); // copy the trailing null
445 } else {
446 const char separator = *os::path_separator();
447 size_t old_len = strlen(path);
448 size_t str_len = strlen(str);
449 size_t len = old_len + str_len + 2;
450
451 if (prepend) {
452 cp = NEW_C_HEAP_ARRAY(char, len, mtInternal);
453 char* cp_tmp = cp;
454 memcpy(cp_tmp, str, str_len);
455 cp_tmp += str_len;
456 *cp_tmp = separator;
457 memcpy(++cp_tmp, path, old_len + 1); // copy the trailing null
458 FREE_C_HEAP_ARRAY(char, path);
459 } else {
460 cp = REALLOC_C_HEAP_ARRAY(char, path, len, mtInternal);
461 char* cp_tmp = cp + old_len;
462 *cp_tmp = separator;
463 memcpy(++cp_tmp, str, str_len + 1); // copy the trailing null
464 }
465 }
466 return cp;
467 }
468
469 // Scan the directory and append any jar or zip files found to path.
470 // Note: path must be c-heap-allocated (or NULL); it is freed if non-null.
471 char* SysClassPath::add_jars_to_path(char* path, const char* directory) {
472 DIR* dir = os::opendir(directory);
473 if (dir == NULL) return path;
474
475 char dir_sep[2] = { '\0', '\0' };
476 size_t directory_len = strlen(directory);
477 const char fileSep = *os::file_separator();
478 if (directory[directory_len - 1] != fileSep) dir_sep[0] = fileSep;
479
480 /* Scan the directory for jars/zips, appending them to path. */
481 struct dirent *entry;
482 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtInternal);
483 while ((entry = os::readdir(dir, (dirent *) dbuf)) != NULL) {
484 const char* name = entry->d_name;
485 const char* ext = name + strlen(name) - 4;
486 bool isJarOrZip = ext > name &&
487 (os::file_name_strcmp(ext, ".jar") == 0 ||
488 os::file_name_strcmp(ext, ".zip") == 0);
489 if (isJarOrZip) {
490 char* jarpath = NEW_C_HEAP_ARRAY(char, directory_len + 2 + strlen(name), mtInternal);
491 sprintf(jarpath, "%s%s%s", directory, dir_sep, name);
492 path = add_to_path(path, jarpath, false);
493 FREE_C_HEAP_ARRAY(char, jarpath);
494 }
495 }
496 FREE_C_HEAP_ARRAY(char, dbuf);
497 os::closedir(dir);
498 return path;
499 }
500
501 // Parses a memory size specification string.
502 static bool atomull(const char *s, julong* result) {
503 julong n = 0;
504 int args_read = 0;
505 bool is_hex = false;
506 // Skip leading 0[xX] for hexadecimal
507 if (*s =='0' && (*(s+1) == 'x' || *(s+1) == 'X')) {
508 s += 2;
509 is_hex = true;
510 args_read = sscanf(s, JULONG_FORMAT_X, &n);
511 } else {
512 args_read = sscanf(s, JULONG_FORMAT, &n);
513 }
514 if (args_read != 1) {
515 return false;
516 }
517 while (*s != '\0' && (isdigit(*s) || (is_hex && isxdigit(*s)))) {
518 s++;
519 }
520 // 4705540: illegal if more characters are found after the first non-digit
521 if (strlen(s) > 1) {
522 return false;
523 }
524 switch (*s) {
525 case 'T': case 't':
526 *result = n * G * K;
527 // Check for overflow.
528 if (*result/((julong)G * K) != n) return false;
529 return true;
530 case 'G': case 'g':
531 *result = n * G;
532 if (*result/G != n) return false;
533 return true;
534 case 'M': case 'm':
535 *result = n * M;
536 if (*result/M != n) return false;
537 return true;
538 case 'K': case 'k':
539 *result = n * K;
540 if (*result/K != n) return false;
541 return true;
542 case '\0':
543 *result = n;
544 return true;
545 default:
546 return false;
547 }
548 }
549
550 Arguments::ArgsRange Arguments::check_memory_size(julong size, julong min_size) {
551 if (size < min_size) return arg_too_small;
552 // Check that size will fit in a size_t (only relevant on 32-bit)
553 if (size > max_uintx) return arg_too_big;
554 return arg_in_range;
555 }
556
557 // Describe an argument out of range error
558 void Arguments::describe_range_error(ArgsRange errcode) {
559 switch(errcode) {
560 case arg_too_big:
561 jio_fprintf(defaultStream::error_stream(),
562 "The specified size exceeds the maximum "
563 "representable size.\n");
564 break;
565 case arg_too_small:
566 case arg_unreadable:
567 case arg_in_range:
568 // do nothing for now
569 break;
570 default:
571 ShouldNotReachHere();
572 }
573 }
574
575 static bool set_bool_flag(char* name, bool value, Flag::Flags origin) {
576 if (CommandLineFlags::boolAtPut(name, &value, origin) == Flag::SUCCESS) {
577 return true;
578 } else {
579 return false;
580 }
581 }
582
583 static bool set_fp_numeric_flag(char* name, char* value, Flag::Flags origin) {
584 double v;
585 if (sscanf(value, "%lf", &v) != 1) {
586 return false;
587 }
588
589 if (CommandLineFlags::doubleAtPut(name, &v, origin) == Flag::SUCCESS) {
590 return true;
591 }
592 return false;
593 }
594
595 static bool set_numeric_flag(char* name, char* value, Flag::Flags origin) {
596 julong v;
597 int int_v;
598 intx intx_v;
599 bool is_neg = false;
600 // Check the sign first since atomull() parses only unsigned values.
601 if (*value == '-') {
602 if ((CommandLineFlags::intxAt(name, &intx_v) != Flag::SUCCESS) && (CommandLineFlags::intAt(name, &int_v) != Flag::SUCCESS)) {
603 return false;
604 }
605 value++;
606 is_neg = true;
607 }
608 if (!atomull(value, &v)) {
609 return false;
610 }
611 int_v = (int) v;
612 if (is_neg) {
613 int_v = -int_v;
614 }
615 if (CommandLineFlags::intAtPut(name, &int_v, origin) == Flag::SUCCESS) {
616 return true;
617 }
618 uint uint_v = (uint) v;
619 if (!is_neg && CommandLineFlags::uintAtPut(name, &uint_v, origin) == Flag::SUCCESS) {
620 return true;
621 }
622 intx_v = (intx) v;
623 if (is_neg) {
624 intx_v = -intx_v;
625 }
626 if (CommandLineFlags::intxAtPut(name, &intx_v, origin) == Flag::SUCCESS) {
627 return true;
628 }
629 uintx uintx_v = (uintx) v;
630 if (!is_neg && (CommandLineFlags::uintxAtPut(name, &uintx_v, origin) == Flag::SUCCESS)) {
631 return true;
632 }
633 uint64_t uint64_t_v = (uint64_t) v;
634 if (!is_neg && (CommandLineFlags::uint64_tAtPut(name, &uint64_t_v, origin) == Flag::SUCCESS)) {
635 return true;
636 }
637 size_t size_t_v = (size_t) v;
638 if (!is_neg && (CommandLineFlags::size_tAtPut(name, &size_t_v, origin) == Flag::SUCCESS)) {
639 return true;
640 }
641 return false;
642 }
643
644 static bool set_string_flag(char* name, const char* value, Flag::Flags origin) {
645 if (CommandLineFlags::ccstrAtPut(name, &value, origin) != Flag::SUCCESS) return false;
646 // Contract: CommandLineFlags always returns a pointer that needs freeing.
647 FREE_C_HEAP_ARRAY(char, value);
648 return true;
649 }
650
651 static bool append_to_string_flag(char* name, const char* new_value, Flag::Flags origin) {
652 const char* old_value = "";
653 if (CommandLineFlags::ccstrAt(name, &old_value) != Flag::SUCCESS) return false;
654 size_t old_len = old_value != NULL ? strlen(old_value) : 0;
655 size_t new_len = strlen(new_value);
656 const char* value;
657 char* free_this_too = NULL;
658 if (old_len == 0) {
659 value = new_value;
660 } else if (new_len == 0) {
661 value = old_value;
662 } else {
663 char* buf = NEW_C_HEAP_ARRAY(char, old_len + 1 + new_len + 1, mtInternal);
664 // each new setting adds another LINE to the switch:
665 sprintf(buf, "%s\n%s", old_value, new_value);
666 value = buf;
667 free_this_too = buf;
668 }
669 (void) CommandLineFlags::ccstrAtPut(name, &value, origin);
670 // CommandLineFlags always returns a pointer that needs freeing.
671 FREE_C_HEAP_ARRAY(char, value);
672 if (free_this_too != NULL) {
673 // CommandLineFlags made its own copy, so I must delete my own temp. buffer.
674 FREE_C_HEAP_ARRAY(char, free_this_too);
675 }
676 return true;
677 }
678
679 bool Arguments::parse_argument(const char* arg, Flag::Flags origin) {
680
681 // range of acceptable characters spelled out for portability reasons
682 #define NAME_RANGE "[abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_]"
683 #define BUFLEN 255
684 char name[BUFLEN+1];
685 char dummy;
686
687 if (sscanf(arg, "-%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
688 return set_bool_flag(name, false, origin);
689 }
690 if (sscanf(arg, "+%" XSTR(BUFLEN) NAME_RANGE "%c", name, &dummy) == 1) {
691 return set_bool_flag(name, true, origin);
692 }
693
694 char punct;
695 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "%c", name, &punct) == 2 && punct == '=') {
696 const char* value = strchr(arg, '=') + 1;
697 Flag* flag = Flag::find_flag(name, strlen(name));
698 if (flag != NULL && flag->is_ccstr()) {
699 if (flag->ccstr_accumulates()) {
700 return append_to_string_flag(name, value, origin);
701 } else {
702 if (value[0] == '\0') {
703 value = NULL;
704 }
705 return set_string_flag(name, value, origin);
706 }
707 }
708 }
709
710 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE ":%c", name, &punct) == 2 && punct == '=') {
711 const char* value = strchr(arg, '=') + 1;
712 // -XX:Foo:=xxx will reset the string flag to the given value.
713 if (value[0] == '\0') {
714 value = NULL;
715 }
716 return set_string_flag(name, value, origin);
717 }
718
719 #define SIGNED_FP_NUMBER_RANGE "[-0123456789.]"
720 #define SIGNED_NUMBER_RANGE "[-0123456789]"
721 #define NUMBER_RANGE "[0123456789]"
722 char value[BUFLEN + 1];
723 char value2[BUFLEN + 1];
724 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_NUMBER_RANGE "." "%" XSTR(BUFLEN) NUMBER_RANGE "%c", name, value, value2, &dummy) == 3) {
725 // Looks like a floating-point number -- try again with more lenient format string
726 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) SIGNED_FP_NUMBER_RANGE "%c", name, value, &dummy) == 2) {
727 return set_fp_numeric_flag(name, value, origin);
728 }
729 }
730
731 #define VALUE_RANGE "[-kmgtxKMGTX0123456789abcdefABCDEF]"
732 if (sscanf(arg, "%" XSTR(BUFLEN) NAME_RANGE "=" "%" XSTR(BUFLEN) VALUE_RANGE "%c", name, value, &dummy) == 2) {
733 return set_numeric_flag(name, value, origin);
734 }
735
736 return false;
737 }
738
739 void Arguments::add_string(char*** bldarray, int* count, const char* arg) {
740 assert(bldarray != NULL, "illegal argument");
741
742 if (arg == NULL) {
743 return;
744 }
745
746 int new_count = *count + 1;
747
748 // expand the array and add arg to the last element
749 if (*bldarray == NULL) {
750 *bldarray = NEW_C_HEAP_ARRAY(char*, new_count, mtInternal);
751 } else {
752 *bldarray = REALLOC_C_HEAP_ARRAY(char*, *bldarray, new_count, mtInternal);
753 }
754 (*bldarray)[*count] = os::strdup_check_oom(arg);
755 *count = new_count;
756 }
757
758 void Arguments::build_jvm_args(const char* arg) {
759 add_string(&_jvm_args_array, &_num_jvm_args, arg);
760 }
761
762 void Arguments::build_jvm_flags(const char* arg) {
763 add_string(&_jvm_flags_array, &_num_jvm_flags, arg);
764 }
765
766 // utility function to return a string that concatenates all
767 // strings in a given char** array
768 const char* Arguments::build_resource_string(char** args, int count) {
769 if (args == NULL || count == 0) {
770 return NULL;
771 }
772 size_t length = strlen(args[0]) + 1; // add 1 for the null terminator
773 for (int i = 1; i < count; i++) {
774 length += strlen(args[i]) + 1; // add 1 for a space
775 }
776 char* s = NEW_RESOURCE_ARRAY(char, length);
777 strcpy(s, args[0]);
778 for (int j = 1; j < count; j++) {
779 strcat(s, " ");
780 strcat(s, args[j]);
781 }
782 return (const char*) s;
783 }
784
785 void Arguments::print_on(outputStream* st) {
786 st->print_cr("VM Arguments:");
787 if (num_jvm_flags() > 0) {
788 st->print("jvm_flags: "); print_jvm_flags_on(st);
789 st->cr();
790 }
791 if (num_jvm_args() > 0) {
792 st->print("jvm_args: "); print_jvm_args_on(st);
793 st->cr();
794 }
795 st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>");
796 if (_java_class_path != NULL) {
797 char* path = _java_class_path->value();
798 st->print_cr("java_class_path (initial): %s", strlen(path) == 0 ? "<not set>" : path );
799 }
800 st->print_cr("Launcher Type: %s", _sun_java_launcher);
801 }
802
803 void Arguments::print_summary_on(outputStream* st) {
804 // Print the command line. Environment variables that are helpful for
805 // reproducing the problem are written later in the hs_err file.
806 // flags are from setting file
807 if (num_jvm_flags() > 0) {
808 st->print_raw("Settings File: ");
809 print_jvm_flags_on(st);
810 st->cr();
811 }
812 // args are the command line and environment variable arguments.
813 st->print_raw("Command Line: ");
814 if (num_jvm_args() > 0) {
815 print_jvm_args_on(st);
816 }
817 // this is the classfile and any arguments to the java program
818 if (java_command() != NULL) {
819 st->print("%s", java_command());
820 }
821 st->cr();
822 }
823
824 void Arguments::print_jvm_flags_on(outputStream* st) {
825 if (_num_jvm_flags > 0) {
826 for (int i=0; i < _num_jvm_flags; i++) {
827 st->print("%s ", _jvm_flags_array[i]);
828 }
829 }
830 }
831
832 void Arguments::print_jvm_args_on(outputStream* st) {
833 if (_num_jvm_args > 0) {
834 for (int i=0; i < _num_jvm_args; i++) {
835 st->print("%s ", _jvm_args_array[i]);
836 }
837 }
838 }
839
840 bool Arguments::process_argument(const char* arg,
841 jboolean ignore_unrecognized, Flag::Flags origin) {
842
843 JDK_Version since = JDK_Version();
844
845 if (parse_argument(arg, origin) || ignore_unrecognized) {
846 return true;
847 }
848
849 // Determine if the flag has '+', '-', or '=' characters.
850 bool has_plus_minus = (*arg == '+' || *arg == '-');
851 const char* const argname = has_plus_minus ? arg + 1 : arg;
852
853 size_t arg_len;
854 const char* equal_sign = strchr(argname, '=');
855 if (equal_sign == NULL) {
856 arg_len = strlen(argname);
857 } else {
858 arg_len = equal_sign - argname;
859 }
860
861 // Only make the obsolete check for valid arguments.
862 if (arg_len <= BUFLEN) {
863 // Construct a string which consists only of the argument name without '+', '-', or '='.
864 char stripped_argname[BUFLEN+1];
865 strncpy(stripped_argname, argname, arg_len);
866 stripped_argname[arg_len] = '\0'; // strncpy may not null terminate.
867
868 if (is_newly_obsolete(stripped_argname, &since)) {
869 char version[256];
870 since.to_string(version, sizeof(version));
871 warning("ignoring option %s; support was removed in %s", stripped_argname, version);
872 return true;
873 }
874 }
875
876 // For locked flags, report a custom error message if available.
877 // Otherwise, report the standard unrecognized VM option.
878 Flag* found_flag = Flag::find_flag((const char*)argname, arg_len, true, true);
879 if (found_flag != NULL) {
880 char locked_message_buf[BUFLEN];
881 found_flag->get_locked_message(locked_message_buf, BUFLEN);
882 if (strlen(locked_message_buf) == 0) {
883 if (found_flag->is_bool() && !has_plus_minus) {
884 jio_fprintf(defaultStream::error_stream(),
885 "Missing +/- setting for VM option '%s'\n", argname);
886 } else if (!found_flag->is_bool() && has_plus_minus) {
887 jio_fprintf(defaultStream::error_stream(),
888 "Unexpected +/- setting in VM option '%s'\n", argname);
889 } else {
890 jio_fprintf(defaultStream::error_stream(),
891 "Improperly specified VM option '%s'\n", argname);
892 }
893 } else {
894 jio_fprintf(defaultStream::error_stream(), "%s", locked_message_buf);
895 }
896 } else {
897 jio_fprintf(defaultStream::error_stream(),
898 "Unrecognized VM option '%s'\n", argname);
899 Flag* fuzzy_matched = Flag::fuzzy_match((const char*)argname, arg_len, true);
900 if (fuzzy_matched != NULL) {
901 jio_fprintf(defaultStream::error_stream(),
902 "Did you mean '%s%s%s'? ",
903 (fuzzy_matched->is_bool()) ? "(+/-)" : "",
904 fuzzy_matched->_name,
905 (fuzzy_matched->is_bool()) ? "" : "=<value>");
906 }
907 }
908
909 // allow for commandline "commenting out" options like -XX:#+Verbose
910 return arg[0] == '#';
911 }
912
913 bool Arguments::process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized) {
914 FILE* stream = fopen(file_name, "rb");
915 if (stream == NULL) {
916 if (should_exist) {
917 jio_fprintf(defaultStream::error_stream(),
918 "Could not open settings file %s\n", file_name);
919 return false;
920 } else {
921 return true;
922 }
923 }
924
925 char token[1024];
926 int pos = 0;
927
928 bool in_white_space = true;
929 bool in_comment = false;
930 bool in_quote = false;
931 char quote_c = 0;
932 bool result = true;
933
934 int c = getc(stream);
935 while(c != EOF && pos < (int)(sizeof(token)-1)) {
936 if (in_white_space) {
937 if (in_comment) {
938 if (c == '\n') in_comment = false;
939 } else {
940 if (c == '#') in_comment = true;
941 else if (!isspace(c)) {
942 in_white_space = false;
943 token[pos++] = c;
944 }
945 }
946 } else {
947 if (c == '\n' || (!in_quote && isspace(c))) {
948 // token ends at newline, or at unquoted whitespace
949 // this allows a way to include spaces in string-valued options
950 token[pos] = '\0';
951 logOption(token);
952 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
953 build_jvm_flags(token);
954 pos = 0;
955 in_white_space = true;
956 in_quote = false;
957 } else if (!in_quote && (c == '\'' || c == '"')) {
958 in_quote = true;
959 quote_c = c;
960 } else if (in_quote && (c == quote_c)) {
961 in_quote = false;
962 } else {
963 token[pos++] = c;
964 }
965 }
966 c = getc(stream);
967 }
968 if (pos > 0) {
969 token[pos] = '\0';
970 result &= process_argument(token, ignore_unrecognized, Flag::CONFIG_FILE);
971 build_jvm_flags(token);
972 }
973 fclose(stream);
974 return result;
975 }
976
977 //=============================================================================================================
978 // Parsing of properties (-D)
979
980 const char* Arguments::get_property(const char* key) {
981 return PropertyList_get_value(system_properties(), key);
982 }
983
984 bool Arguments::add_property(const char* prop) {
985 const char* eq = strchr(prop, '=');
986 const char* key;
987 const char* value = "";
988
989 if (eq == NULL) {
990 // property doesn't have a value, thus use passed string
991 key = prop;
992 } else {
993 // property have a value, thus extract it and save to the
994 // allocated string
995 size_t key_len = eq - prop;
996 char* tmp_key = AllocateHeap(key_len + 1, mtInternal);
997
998 strncpy(tmp_key, prop, key_len);
999 tmp_key[key_len] = '\0';
1000 key = tmp_key;
1001
1002 value = &prop[key_len + 1];
1003 }
1004
1005 if (strcmp(key, "java.compiler") == 0) {
1006 process_java_compiler_argument(value);
1007 // Record value in Arguments, but let it get passed to Java.
1008 } else if (strcmp(key, "sun.java.launcher.is_altjvm") == 0 ||
1009 strcmp(key, "sun.java.launcher.pid") == 0) {
1010 // sun.java.launcher.is_altjvm and sun.java.launcher.pid property are
1011 // private and are processed in process_sun_java_launcher_properties();
1012 // the sun.java.launcher property is passed on to the java application
1013 } else if (strcmp(key, "sun.boot.library.path") == 0) {
1014 PropertyList_unique_add(&_system_properties, key, value, true);
1015 } else {
1016 if (strcmp(key, "sun.java.command") == 0) {
1017 if (_java_command != NULL) {
1018 os::free(_java_command);
1019 }
1020 _java_command = os::strdup_check_oom(value, mtInternal);
1021 } else if (strcmp(key, "java.vendor.url.bug") == 0) {
1022 if (_java_vendor_url_bug != DEFAULT_VENDOR_URL_BUG) {
1023 assert(_java_vendor_url_bug != NULL, "_java_vendor_url_bug is NULL");
1024 os::free((void *)_java_vendor_url_bug);
1025 }
1026 // save it in _java_vendor_url_bug, so JVM fatal error handler can access
1027 // its value without going through the property list or making a Java call.
1028 _java_vendor_url_bug = os::strdup_check_oom(value, mtInternal);
1029 }
1030
1031 // Create new property and add at the end of the list
1032 PropertyList_unique_add(&_system_properties, key, value);
1033 }
1034
1035 if (key != prop) {
1036 // SystemProperty copy passed value, thus free previously allocated
1037 // memory
1038 FreeHeap((void *)key);
1039 }
1040
1041 return true;
1042 }
1043
1044 //===========================================================================================================
1045 // Setting int/mixed/comp mode flags
1046
1047 void Arguments::set_mode_flags(Mode mode) {
1048 // Set up default values for all flags.
1049 // If you add a flag to any of the branches below,
1050 // add a default value for it here.
1051 set_java_compiler(false);
1052 _mode = mode;
1053
1054 // Ensure Agent_OnLoad has the correct initial values.
1055 // This may not be the final mode; mode may change later in onload phase.
1056 PropertyList_unique_add(&_system_properties, "java.vm.info",
1057 VM_Version::vm_info_string(), false);
1058
1059 UseInterpreter = true;
1060 UseCompiler = true;
1061 UseLoopCounter = true;
1062
1063 // Default values may be platform/compiler dependent -
1064 // use the saved values
1065 ClipInlining = Arguments::_ClipInlining;
1066 AlwaysCompileLoopMethods = Arguments::_AlwaysCompileLoopMethods;
1067 UseOnStackReplacement = Arguments::_UseOnStackReplacement;
1068 BackgroundCompilation = Arguments::_BackgroundCompilation;
1069 if (TieredCompilation) {
1070 if (FLAG_IS_DEFAULT(Tier3InvokeNotifyFreqLog)) {
1071 Tier3InvokeNotifyFreqLog = Arguments::_Tier3InvokeNotifyFreqLog;
1072 }
1073 if (FLAG_IS_DEFAULT(Tier4InvocationThreshold)) {
1074 Tier4InvocationThreshold = Arguments::_Tier4InvocationThreshold;
1075 }
1076 }
1077
1078 // Change from defaults based on mode
1079 switch (mode) {
1080 default:
1081 ShouldNotReachHere();
1082 break;
1083 case _int:
1084 UseCompiler = false;
1085 UseLoopCounter = false;
1086 AlwaysCompileLoopMethods = false;
1087 UseOnStackReplacement = false;
1088 break;
1089 case _mixed:
1090 // same as default
1091 break;
1092 case _comp:
1093 UseInterpreter = false;
1094 BackgroundCompilation = false;
1095 ClipInlining = false;
1096 // Be much more aggressive in tiered mode with -Xcomp and exercise C2 more.
1097 // We will first compile a level 3 version (C1 with full profiling), then do one invocation of it and
1098 // compile a level 4 (C2) and then continue executing it.
1099 if (TieredCompilation) {
1100 Tier3InvokeNotifyFreqLog = 0;
1101 Tier4InvocationThreshold = 0;
1102 }
1103 break;
1104 }
1105 }
1106
1107 #if defined(COMPILER2) || defined(_LP64) || !INCLUDE_CDS
1108 // Conflict: required to use shared spaces (-Xshare:on), but
1109 // incompatible command line options were chosen.
1110
1111 static void no_shared_spaces(const char* message) {
1112 if (RequireSharedSpaces) {
1113 jio_fprintf(defaultStream::error_stream(),
1114 "Class data sharing is inconsistent with other specified options.\n");
1115 vm_exit_during_initialization("Unable to use shared archive.", message);
1116 } else {
1117 FLAG_SET_DEFAULT(UseSharedSpaces, false);
1118 }
1119 }
1120 #endif
1121
1122 // Returns threshold scaled with the value of scale.
1123 // If scale < 0.0, threshold is returned without scaling.
1124 intx Arguments::scaled_compile_threshold(intx threshold, double scale) {
1125 if (scale == 1.0 || scale < 0.0) {
1126 return threshold;
1127 } else {
1128 return (intx)(threshold * scale);
1129 }
1130 }
1131
1132 // Returns freq_log scaled with the value of scale.
1133 // Returned values are in the range of [0, InvocationCounter::number_of_count_bits + 1].
1134 // If scale < 0.0, freq_log is returned without scaling.
1135 intx Arguments::scaled_freq_log(intx freq_log, double scale) {
1136 // Check if scaling is necessary or if negative value was specified.
1137 if (scale == 1.0 || scale < 0.0) {
1138 return freq_log;
1139 }
1140 // Check values to avoid calculating log2 of 0.
1141 if (scale == 0.0 || freq_log == 0) {
1142 return 0;
1143 }
1144 // Determine the maximum notification frequency value currently supported.
1145 // The largest mask value that the interpreter/C1 can handle is
1146 // of length InvocationCounter::number_of_count_bits. Mask values are always
1147 // one bit shorter then the value of the notification frequency. Set
1148 // max_freq_bits accordingly.
1149 intx max_freq_bits = InvocationCounter::number_of_count_bits + 1;
1150 intx scaled_freq = scaled_compile_threshold((intx)1 << freq_log, scale);
1151 if (scaled_freq == 0) {
1152 // Return 0 right away to avoid calculating log2 of 0.
1153 return 0;
1154 } else if (scaled_freq > nth_bit(max_freq_bits)) {
1155 return max_freq_bits;
1156 } else {
1157 return log2_intptr(scaled_freq);
1158 }
1159 }
1160
1161 void Arguments::set_tiered_flags() {
1162 // With tiered, set default policy to AdvancedThresholdPolicy, which is 3.
1163 if (FLAG_IS_DEFAULT(CompilationPolicyChoice)) {
1164 FLAG_SET_DEFAULT(CompilationPolicyChoice, 3);
1165 }
1166 if (CompilationPolicyChoice < 2) {
1167 vm_exit_during_initialization(
1168 "Incompatible compilation policy selected", NULL);
1169 }
1170 // Increase the code cache size - tiered compiles a lot more.
1171 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
1172 FLAG_SET_ERGO(uintx, ReservedCodeCacheSize,
1173 MIN2(CODE_CACHE_DEFAULT_LIMIT, ReservedCodeCacheSize * 5));
1174 }
1175 // Enable SegmentedCodeCache if TieredCompilation is enabled and ReservedCodeCacheSize >= 240M
1176 if (FLAG_IS_DEFAULT(SegmentedCodeCache) && ReservedCodeCacheSize >= 240*M) {
1177 FLAG_SET_ERGO(bool, SegmentedCodeCache, true);
1178
1179 if (FLAG_IS_DEFAULT(ReservedCodeCacheSize)) {
1180 // Multiply sizes by 5 but fix NonNMethodCodeHeapSize (distribute among non-profiled and profiled code heap)
1181 if (FLAG_IS_DEFAULT(ProfiledCodeHeapSize)) {
1182 FLAG_SET_ERGO(uintx, ProfiledCodeHeapSize, ProfiledCodeHeapSize * 5 + NonNMethodCodeHeapSize * 2);
1183 }
1184 if (FLAG_IS_DEFAULT(NonProfiledCodeHeapSize)) {
1185 FLAG_SET_ERGO(uintx, NonProfiledCodeHeapSize, NonProfiledCodeHeapSize * 5 + NonNMethodCodeHeapSize * 2);
1186 }
1187 // Check consistency of code heap sizes
1188 if ((NonNMethodCodeHeapSize + NonProfiledCodeHeapSize + ProfiledCodeHeapSize) != ReservedCodeCacheSize) {
1189 jio_fprintf(defaultStream::error_stream(),
1190 "Invalid code heap sizes: NonNMethodCodeHeapSize(%dK) + ProfiledCodeHeapSize(%dK) + NonProfiledCodeHeapSize(%dK) = %dK. Must be equal to ReservedCodeCacheSize = %uK.\n",
1191 NonNMethodCodeHeapSize/K, ProfiledCodeHeapSize/K, NonProfiledCodeHeapSize/K,
1192 (NonNMethodCodeHeapSize + ProfiledCodeHeapSize + NonProfiledCodeHeapSize)/K, ReservedCodeCacheSize/K);
1193 vm_exit(1);
1194 }
1195 }
1196 }
1197 if (!UseInterpreter) { // -Xcomp
1198 Tier3InvokeNotifyFreqLog = 0;
1199 Tier4InvocationThreshold = 0;
1200 }
1201
1202 if (CompileThresholdScaling < 0) {
1203 vm_exit_during_initialization("Negative value specified for CompileThresholdScaling", NULL);
1204 }
1205
1206 // Scale tiered compilation thresholds.
1207 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves compilation thresholds unchanged.
1208 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
1209 FLAG_SET_ERGO(intx, Tier0InvokeNotifyFreqLog, scaled_freq_log(Tier0InvokeNotifyFreqLog));
1210 FLAG_SET_ERGO(intx, Tier0BackedgeNotifyFreqLog, scaled_freq_log(Tier0BackedgeNotifyFreqLog));
1211
1212 FLAG_SET_ERGO(intx, Tier3InvocationThreshold, scaled_compile_threshold(Tier3InvocationThreshold));
1213 FLAG_SET_ERGO(intx, Tier3MinInvocationThreshold, scaled_compile_threshold(Tier3MinInvocationThreshold));
1214 FLAG_SET_ERGO(intx, Tier3CompileThreshold, scaled_compile_threshold(Tier3CompileThreshold));
1215 FLAG_SET_ERGO(intx, Tier3BackEdgeThreshold, scaled_compile_threshold(Tier3BackEdgeThreshold));
1216
1217 // Tier2{Invocation,MinInvocation,Compile,Backedge}Threshold should be scaled here
1218 // once these thresholds become supported.
1219
1220 FLAG_SET_ERGO(intx, Tier2InvokeNotifyFreqLog, scaled_freq_log(Tier2InvokeNotifyFreqLog));
1221 FLAG_SET_ERGO(intx, Tier2BackedgeNotifyFreqLog, scaled_freq_log(Tier2BackedgeNotifyFreqLog));
1222
1223 FLAG_SET_ERGO(intx, Tier3InvokeNotifyFreqLog, scaled_freq_log(Tier3InvokeNotifyFreqLog));
1224 FLAG_SET_ERGO(intx, Tier3BackedgeNotifyFreqLog, scaled_freq_log(Tier3BackedgeNotifyFreqLog));
1225
1226 FLAG_SET_ERGO(intx, Tier23InlineeNotifyFreqLog, scaled_freq_log(Tier23InlineeNotifyFreqLog));
1227
1228 FLAG_SET_ERGO(intx, Tier4InvocationThreshold, scaled_compile_threshold(Tier4InvocationThreshold));
1229 FLAG_SET_ERGO(intx, Tier4MinInvocationThreshold, scaled_compile_threshold(Tier4MinInvocationThreshold));
1230 FLAG_SET_ERGO(intx, Tier4CompileThreshold, scaled_compile_threshold(Tier4CompileThreshold));
1231 FLAG_SET_ERGO(intx, Tier4BackEdgeThreshold, scaled_compile_threshold(Tier4BackEdgeThreshold));
1232 }
1233 }
1234
1235 #if INCLUDE_ALL_GCS
1236 static void disable_adaptive_size_policy(const char* collector_name) {
1237 if (UseAdaptiveSizePolicy) {
1238 if (FLAG_IS_CMDLINE(UseAdaptiveSizePolicy)) {
1239 warning("disabling UseAdaptiveSizePolicy; it is incompatible with %s.",
1240 collector_name);
1241 }
1242 FLAG_SET_DEFAULT(UseAdaptiveSizePolicy, false);
1243 }
1244 }
1245
1246 void Arguments::set_parnew_gc_flags() {
1247 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC && !UseG1GC,
1248 "control point invariant");
1249 assert(UseConcMarkSweepGC, "CMS is expected to be on here");
1250 assert(UseParNewGC, "ParNew should always be used with CMS");
1251
1252 if (FLAG_IS_DEFAULT(ParallelGCThreads)) {
1253 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads());
1254 assert(ParallelGCThreads > 0, "We should always have at least one thread by default");
1255 } else if (ParallelGCThreads == 0) {
1256 jio_fprintf(defaultStream::error_stream(),
1257 "The ParNew GC can not be combined with -XX:ParallelGCThreads=0\n");
1258 vm_exit(1);
1259 }
1260
1261 // By default YoungPLABSize and OldPLABSize are set to 4096 and 1024 respectively,
1262 // these settings are default for Parallel Scavenger. For ParNew+Tenured configuration
1263 // we set them to 1024 and 1024.
1264 // See CR 6362902.
1265 if (FLAG_IS_DEFAULT(YoungPLABSize)) {
1266 FLAG_SET_DEFAULT(YoungPLABSize, (intx)1024);
1267 }
1268 if (FLAG_IS_DEFAULT(OldPLABSize)) {
1269 FLAG_SET_DEFAULT(OldPLABSize, (intx)1024);
1270 }
1271
1272 // When using compressed oops, we use local overflow stacks,
1273 // rather than using a global overflow list chained through
1274 // the klass word of the object's pre-image.
1275 if (UseCompressedOops && !ParGCUseLocalOverflow) {
1276 if (!FLAG_IS_DEFAULT(ParGCUseLocalOverflow)) {
1277 warning("Forcing +ParGCUseLocalOverflow: needed if using compressed references");
1278 }
1279 FLAG_SET_DEFAULT(ParGCUseLocalOverflow, true);
1280 }
1281 assert(ParGCUseLocalOverflow || !UseCompressedOops, "Error");
1282 }
1283
1284 // Adjust some sizes to suit CMS and/or ParNew needs; these work well on
1285 // sparc/solaris for certain applications, but would gain from
1286 // further optimization and tuning efforts, and would almost
1287 // certainly gain from analysis of platform and environment.
1288 void Arguments::set_cms_and_parnew_gc_flags() {
1289 assert(!UseSerialGC && !UseParallelOldGC && !UseParallelGC, "Error");
1290 assert(UseConcMarkSweepGC, "CMS is expected to be on here");
1291 assert(UseParNewGC, "ParNew should always be used with CMS");
1292
1293 // Turn off AdaptiveSizePolicy by default for cms until it is complete.
1294 disable_adaptive_size_policy("UseConcMarkSweepGC");
1295
1296 set_parnew_gc_flags();
1297
1298 size_t max_heap = align_size_down(MaxHeapSize,
1299 CardTableRS::ct_max_alignment_constraint());
1300
1301 // Now make adjustments for CMS
1302 intx tenuring_default = (intx)6;
1303 size_t young_gen_per_worker = CMSYoungGenPerWorker;
1304
1305 // Preferred young gen size for "short" pauses:
1306 // upper bound depends on # of threads and NewRatio.
1307 const size_t preferred_max_new_size_unaligned =
1308 MIN2(max_heap/(NewRatio+1), ScaleForWordSize(young_gen_per_worker * ParallelGCThreads));
1309 size_t preferred_max_new_size =
1310 align_size_up(preferred_max_new_size_unaligned, os::vm_page_size());
1311
1312 // Unless explicitly requested otherwise, size young gen
1313 // for "short" pauses ~ CMSYoungGenPerWorker*ParallelGCThreads
1314
1315 // If either MaxNewSize or NewRatio is set on the command line,
1316 // assume the user is trying to set the size of the young gen.
1317 if (FLAG_IS_DEFAULT(MaxNewSize) && FLAG_IS_DEFAULT(NewRatio)) {
1318
1319 // Set MaxNewSize to our calculated preferred_max_new_size unless
1320 // NewSize was set on the command line and it is larger than
1321 // preferred_max_new_size.
1322 if (!FLAG_IS_DEFAULT(NewSize)) { // NewSize explicitly set at command-line
1323 FLAG_SET_ERGO(size_t, MaxNewSize, MAX2(NewSize, preferred_max_new_size));
1324 } else {
1325 FLAG_SET_ERGO(size_t, MaxNewSize, preferred_max_new_size);
1326 }
1327 if (PrintGCDetails && Verbose) {
1328 // Too early to use gclog_or_tty
1329 tty->print_cr("CMS ergo set MaxNewSize: " SIZE_FORMAT, MaxNewSize);
1330 }
1331
1332 // Code along this path potentially sets NewSize and OldSize
1333 if (PrintGCDetails && Verbose) {
1334 // Too early to use gclog_or_tty
1335 tty->print_cr("CMS set min_heap_size: " SIZE_FORMAT
1336 " initial_heap_size: " SIZE_FORMAT
1337 " max_heap: " SIZE_FORMAT,
1338 min_heap_size(), InitialHeapSize, max_heap);
1339 }
1340 size_t min_new = preferred_max_new_size;
1341 if (FLAG_IS_CMDLINE(NewSize)) {
1342 min_new = NewSize;
1343 }
1344 if (max_heap > min_new && min_heap_size() > min_new) {
1345 // Unless explicitly requested otherwise, make young gen
1346 // at least min_new, and at most preferred_max_new_size.
1347 if (FLAG_IS_DEFAULT(NewSize)) {
1348 FLAG_SET_ERGO(size_t, NewSize, MAX2(NewSize, min_new));
1349 FLAG_SET_ERGO(size_t, NewSize, MIN2(preferred_max_new_size, NewSize));
1350 if (PrintGCDetails && Verbose) {
1351 // Too early to use gclog_or_tty
1352 tty->print_cr("CMS ergo set NewSize: " SIZE_FORMAT, NewSize);
1353 }
1354 }
1355 // Unless explicitly requested otherwise, size old gen
1356 // so it's NewRatio x of NewSize.
1357 if (FLAG_IS_DEFAULT(OldSize)) {
1358 if (max_heap > NewSize) {
1359 FLAG_SET_ERGO(size_t, OldSize, MIN2(NewRatio*NewSize, max_heap - NewSize));
1360 if (PrintGCDetails && Verbose) {
1361 // Too early to use gclog_or_tty
1362 tty->print_cr("CMS ergo set OldSize: " SIZE_FORMAT, OldSize);
1363 }
1364 }
1365 }
1366 }
1367 }
1368 // Unless explicitly requested otherwise, definitely
1369 // promote all objects surviving "tenuring_default" scavenges.
1370 if (FLAG_IS_DEFAULT(MaxTenuringThreshold) &&
1371 FLAG_IS_DEFAULT(SurvivorRatio)) {
1372 FLAG_SET_ERGO(uintx, MaxTenuringThreshold, tenuring_default);
1373 }
1374 // If we decided above (or user explicitly requested)
1375 // `promote all' (via MaxTenuringThreshold := 0),
1376 // prefer minuscule survivor spaces so as not to waste
1377 // space for (non-existent) survivors
1378 if (FLAG_IS_DEFAULT(SurvivorRatio) && MaxTenuringThreshold == 0) {
1379 FLAG_SET_ERGO(uintx, SurvivorRatio, MAX2((uintx)1024, SurvivorRatio));
1380 }
1381
1382 // OldPLABSize is interpreted in CMS as not the size of the PLAB in words,
1383 // but rather the number of free blocks of a given size that are used when
1384 // replenishing the local per-worker free list caches.
1385 if (FLAG_IS_DEFAULT(OldPLABSize)) {
1386 if (!FLAG_IS_DEFAULT(ResizeOldPLAB) && !ResizeOldPLAB) {
1387 // OldPLAB sizing manually turned off: Use a larger default setting,
1388 // unless it was manually specified. This is because a too-low value
1389 // will slow down scavenges.
1390 FLAG_SET_ERGO(size_t, OldPLABSize, CFLS_LAB::_default_static_old_plab_size); // default value before 6631166
1391 } else {
1392 FLAG_SET_DEFAULT(OldPLABSize, CFLS_LAB::_default_dynamic_old_plab_size); // old CMSParPromoteBlocksToClaim default
1393 }
1394 }
1395
1396 // If either of the static initialization defaults have changed, note this
1397 // modification.
1398 if (!FLAG_IS_DEFAULT(OldPLABSize) || !FLAG_IS_DEFAULT(OldPLABWeight)) {
1399 CFLS_LAB::modify_initialization(OldPLABSize, OldPLABWeight);
1400 }
1401
1402 if (!ClassUnloading) {
1403 FLAG_SET_CMDLINE(bool, CMSClassUnloadingEnabled, false);
1404 FLAG_SET_CMDLINE(bool, ExplicitGCInvokesConcurrentAndUnloadsClasses, false);
1405 }
1406
1407 if (PrintGCDetails && Verbose) {
1408 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk",
1409 (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K));
1410 tty->print_cr("ConcGCThreads: %u", ConcGCThreads);
1411 }
1412 }
1413 #endif // INCLUDE_ALL_GCS
1414
1415 void set_object_alignment() {
1416 // Object alignment.
1417 assert(is_power_of_2(ObjectAlignmentInBytes), "ObjectAlignmentInBytes must be power of 2");
1418 MinObjAlignmentInBytes = ObjectAlignmentInBytes;
1419 assert(MinObjAlignmentInBytes >= HeapWordsPerLong * HeapWordSize, "ObjectAlignmentInBytes value is too small");
1420 MinObjAlignment = MinObjAlignmentInBytes / HeapWordSize;
1421 assert(MinObjAlignmentInBytes == MinObjAlignment * HeapWordSize, "ObjectAlignmentInBytes value is incorrect");
1422 MinObjAlignmentInBytesMask = MinObjAlignmentInBytes - 1;
1423
1424 LogMinObjAlignmentInBytes = exact_log2(ObjectAlignmentInBytes);
1425 LogMinObjAlignment = LogMinObjAlignmentInBytes - LogHeapWordSize;
1426
1427 // Oop encoding heap max
1428 OopEncodingHeapMax = (uint64_t(max_juint) + 1) << LogMinObjAlignmentInBytes;
1429
1430 if (SurvivorAlignmentInBytes == 0) {
1431 SurvivorAlignmentInBytes = ObjectAlignmentInBytes;
1432 }
1433
1434 #if INCLUDE_ALL_GCS
1435 // Set CMS global values
1436 CompactibleFreeListSpace::set_cms_values();
1437 #endif // INCLUDE_ALL_GCS
1438 }
1439
1440 size_t Arguments::max_heap_for_compressed_oops() {
1441 // Avoid sign flip.
1442 assert(OopEncodingHeapMax > (uint64_t)os::vm_page_size(), "Unusual page size");
1443 // We need to fit both the NULL page and the heap into the memory budget, while
1444 // keeping alignment constraints of the heap. To guarantee the latter, as the
1445 // NULL page is located before the heap, we pad the NULL page to the conservative
1446 // maximum alignment that the GC may ever impose upon the heap.
1447 size_t displacement_due_to_null_page = align_size_up_(os::vm_page_size(),
1448 _conservative_max_heap_alignment);
1449
1450 LP64_ONLY(return OopEncodingHeapMax - displacement_due_to_null_page);
1451 NOT_LP64(ShouldNotReachHere(); return 0);
1452 }
1453
1454 bool Arguments::should_auto_select_low_pause_collector() {
1455 if (UseAutoGCSelectPolicy &&
1456 !FLAG_IS_DEFAULT(MaxGCPauseMillis) &&
1457 (MaxGCPauseMillis <= AutoGCSelectPauseMillis)) {
1458 if (PrintGCDetails) {
1459 // Cannot use gclog_or_tty yet.
1460 tty->print_cr("Automatic selection of the low pause collector"
1461 " based on pause goal of %d (ms)", (int) MaxGCPauseMillis);
1462 }
1463 return true;
1464 }
1465 return false;
1466 }
1467
1468 void Arguments::set_use_compressed_oops() {
1469 #ifndef ZERO
1470 #ifdef _LP64
1471 // MaxHeapSize is not set up properly at this point, but
1472 // the only value that can override MaxHeapSize if we are
1473 // to use UseCompressedOops is InitialHeapSize.
1474 size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize);
1475
1476 if (max_heap_size <= max_heap_for_compressed_oops()) {
1477 #if !defined(COMPILER1) || defined(TIERED)
1478 if (FLAG_IS_DEFAULT(UseCompressedOops)) {
1479 FLAG_SET_ERGO(bool, UseCompressedOops, true);
1480 }
1481 #endif
1482 } else {
1483 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) {
1484 warning("Max heap size too large for Compressed Oops");
1485 FLAG_SET_DEFAULT(UseCompressedOops, false);
1486 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1487 }
1488 }
1489 #endif // _LP64
1490 #endif // ZERO
1491 }
1492
1493
1494 // NOTE: set_use_compressed_klass_ptrs() must be called after calling
1495 // set_use_compressed_oops().
1496 void Arguments::set_use_compressed_klass_ptrs() {
1497 #ifndef ZERO
1498 #ifdef _LP64
1499 // UseCompressedOops must be on for UseCompressedClassPointers to be on.
1500 if (!UseCompressedOops) {
1501 if (UseCompressedClassPointers) {
1502 warning("UseCompressedClassPointers requires UseCompressedOops");
1503 }
1504 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1505 } else {
1506 // Turn on UseCompressedClassPointers too
1507 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) {
1508 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true);
1509 }
1510 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs.
1511 if (UseCompressedClassPointers) {
1512 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) {
1513 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers");
1514 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1515 }
1516 }
1517 }
1518 #endif // _LP64
1519 #endif // !ZERO
1520 }
1521
1522 void Arguments::set_conservative_max_heap_alignment() {
1523 // The conservative maximum required alignment for the heap is the maximum of
1524 // the alignments imposed by several sources: any requirements from the heap
1525 // itself, the collector policy and the maximum page size we may run the VM
1526 // with.
1527 size_t heap_alignment = GenCollectedHeap::conservative_max_heap_alignment();
1528 #if INCLUDE_ALL_GCS
1529 if (UseParallelGC) {
1530 heap_alignment = ParallelScavengeHeap::conservative_max_heap_alignment();
1531 } else if (UseG1GC) {
1532 heap_alignment = G1CollectedHeap::conservative_max_heap_alignment();
1533 }
1534 #endif // INCLUDE_ALL_GCS
1535 _conservative_max_heap_alignment = MAX4(heap_alignment,
1536 (size_t)os::vm_allocation_granularity(),
1537 os::max_page_size(),
1538 CollectorPolicy::compute_heap_alignment());
1539 }
1540
1541 void Arguments::select_gc_ergonomically() {
1542 if (os::is_server_class_machine()) {
1543 if (should_auto_select_low_pause_collector()) {
1544 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true);
1545 } else {
1546 #if defined(JAVASE_EMBEDDED)
1547 FLAG_SET_ERGO(bool, UseParallelGC, true);
1548 #else
1549 FLAG_SET_ERGO(bool, UseG1GC, true);
1550 #endif
1551 }
1552 } else {
1553 FLAG_SET_ERGO(bool, UseSerialGC, true);
1554 }
1555 }
1556
1557 void Arguments::select_gc() {
1558 if (!gc_selected()) {
1559 select_gc_ergonomically();
1560 guarantee(gc_selected(), "No GC selected");
1561 }
1562 }
1563
1564 void Arguments::set_ergonomics_flags() {
1565 select_gc();
1566
1567 #ifdef COMPILER2
1568 // Shared spaces work fine with other GCs but causes bytecode rewriting
1569 // to be disabled, which hurts interpreter performance and decreases
1570 // server performance. When -server is specified, keep the default off
1571 // unless it is asked for. Future work: either add bytecode rewriting
1572 // at link time, or rewrite bytecodes in non-shared methods.
1573 if (!DumpSharedSpaces && !RequireSharedSpaces &&
1574 (FLAG_IS_DEFAULT(UseSharedSpaces) || !UseSharedSpaces)) {
1575 no_shared_spaces("COMPILER2 default: -Xshare:auto | off, have to manually setup to on.");
1576 }
1577 #endif
1578
1579 set_conservative_max_heap_alignment();
1580
1581 #ifndef ZERO
1582 #ifdef _LP64
1583 set_use_compressed_oops();
1584
1585 // set_use_compressed_klass_ptrs() must be called after calling
1586 // set_use_compressed_oops().
1587 set_use_compressed_klass_ptrs();
1588
1589 // Also checks that certain machines are slower with compressed oops
1590 // in vm_version initialization code.
1591 #endif // _LP64
1592 #endif // !ZERO
1593
1594 CodeCacheExtensions::set_ergonomics_flags();
1595 }
1596
1597 void Arguments::set_parallel_gc_flags() {
1598 assert(UseParallelGC || UseParallelOldGC, "Error");
1599 // Enable ParallelOld unless it was explicitly disabled (cmd line or rc file).
1600 if (FLAG_IS_DEFAULT(UseParallelOldGC)) {
1601 FLAG_SET_DEFAULT(UseParallelOldGC, true);
1602 }
1603 FLAG_SET_DEFAULT(UseParallelGC, true);
1604
1605 // If no heap maximum was requested explicitly, use some reasonable fraction
1606 // of the physical memory, up to a maximum of 1GB.
1607 FLAG_SET_DEFAULT(ParallelGCThreads,
1608 Abstract_VM_Version::parallel_worker_threads());
1609 if (ParallelGCThreads == 0) {
1610 jio_fprintf(defaultStream::error_stream(),
1611 "The Parallel GC can not be combined with -XX:ParallelGCThreads=0\n");
1612 vm_exit(1);
1613 }
1614
1615 if (UseAdaptiveSizePolicy) {
1616 // We don't want to limit adaptive heap sizing's freedom to adjust the heap
1617 // unless the user actually sets these flags.
1618 if (FLAG_IS_DEFAULT(MinHeapFreeRatio)) {
1619 FLAG_SET_DEFAULT(MinHeapFreeRatio, 0);
1620 }
1621 if (FLAG_IS_DEFAULT(MaxHeapFreeRatio)) {
1622 FLAG_SET_DEFAULT(MaxHeapFreeRatio, 100);
1623 }
1624 }
1625
1626 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the
1627 // SurvivorRatio has been set, reset their default values to SurvivorRatio +
1628 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger.
1629 // See CR 6362902 for details.
1630 if (!FLAG_IS_DEFAULT(SurvivorRatio)) {
1631 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) {
1632 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2);
1633 }
1634 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) {
1635 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2);
1636 }
1637 }
1638
1639 if (UseParallelOldGC) {
1640 // Par compact uses lower default values since they are treated as
1641 // minimums. These are different defaults because of the different
1642 // interpretation and are not ergonomically set.
1643 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) {
1644 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1);
1645 }
1646 }
1647 }
1648
1649 void Arguments::set_g1_gc_flags() {
1650 assert(UseG1GC, "Error");
1651 #ifdef COMPILER1
1652 FastTLABRefill = false;
1653 #endif
1654 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads());
1655 if (ParallelGCThreads == 0) {
1656 assert(!FLAG_IS_DEFAULT(ParallelGCThreads), "The default value for ParallelGCThreads should not be 0.");
1657 vm_exit_during_initialization("The flag -XX:+UseG1GC can not be combined with -XX:ParallelGCThreads=0", NULL);
1658 }
1659
1660 #if INCLUDE_ALL_GCS
1661 if (G1ConcRefinementThreads == 0) {
1662 FLAG_SET_DEFAULT(G1ConcRefinementThreads, ParallelGCThreads);
1663 }
1664 #endif
1665
1666 // MarkStackSize will be set (if it hasn't been set by the user)
1667 // when concurrent marking is initialized.
1668 // Its value will be based upon the number of parallel marking threads.
1669 // But we do set the maximum mark stack size here.
1670 if (FLAG_IS_DEFAULT(MarkStackSizeMax)) {
1671 FLAG_SET_DEFAULT(MarkStackSizeMax, 128 * TASKQUEUE_SIZE);
1672 }
1673
1674 if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) {
1675 // In G1, we want the default GC overhead goal to be higher than
1676 // say in PS. So we set it here to 10%. Otherwise the heap might
1677 // be expanded more aggressively than we would like it to. In
1678 // fact, even 10% seems to not be high enough in some cases
1679 // (especially small GC stress tests that the main thing they do
1680 // is allocation). We might consider increase it further.
1681 FLAG_SET_DEFAULT(GCTimeRatio, 9);
1682 }
1683
1684 if (PrintGCDetails && Verbose) {
1685 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk",
1686 (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K));
1687 tty->print_cr("ConcGCThreads: %u", ConcGCThreads);
1688 }
1689 }
1690
1691 #if !INCLUDE_ALL_GCS
1692 #ifdef ASSERT
1693 static bool verify_serial_gc_flags() {
1694 return (UseSerialGC &&
1695 !(UseParNewGC || (UseConcMarkSweepGC) || UseG1GC ||
1696 UseParallelGC || UseParallelOldGC));
1697 }
1698 #endif // ASSERT
1699 #endif // INCLUDE_ALL_GCS
1700
1701 void Arguments::set_gc_specific_flags() {
1702 #if INCLUDE_ALL_GCS
1703 // Set per-collector flags
1704 if (UseParallelGC || UseParallelOldGC) {
1705 set_parallel_gc_flags();
1706 } else if (UseConcMarkSweepGC) {
1707 set_cms_and_parnew_gc_flags();
1708 } else if (UseG1GC) {
1709 set_g1_gc_flags();
1710 }
1711 check_deprecated_gc_flags();
1712 if (AssumeMP && !UseSerialGC) {
1713 if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) {
1714 warning("If the number of processors is expected to increase from one, then"
1715 " you should configure the number of parallel GC threads appropriately"
1716 " using -XX:ParallelGCThreads=N");
1717 }
1718 }
1719 if (MinHeapFreeRatio == 100) {
1720 // Keeping the heap 100% free is hard ;-) so limit it to 99%.
1721 FLAG_SET_ERGO(uintx, MinHeapFreeRatio, 99);
1722 }
1723 #else // INCLUDE_ALL_GCS
1724 assert(verify_serial_gc_flags(), "SerialGC unset");
1725 #endif // INCLUDE_ALL_GCS
1726 }
1727
1728 julong Arguments::limit_by_allocatable_memory(julong limit) {
1729 julong max_allocatable;
1730 julong result = limit;
1731 if (os::has_allocatable_memory_limit(&max_allocatable)) {
1732 result = MIN2(result, max_allocatable / MaxVirtMemFraction);
1733 }
1734 return result;
1735 }
1736
1737 // Use static initialization to get the default before parsing
1738 static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress;
1739
1740 void Arguments::set_heap_size() {
1741 if (!FLAG_IS_DEFAULT(DefaultMaxRAMFraction)) {
1742 // Deprecated flag
1743 FLAG_SET_CMDLINE(uintx, MaxRAMFraction, DefaultMaxRAMFraction);
1744 }
1745
1746 const julong phys_mem =
1747 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM)
1748 : (julong)MaxRAM;
1749
1750 // If the maximum heap size has not been set with -Xmx,
1751 // then set it as fraction of the size of physical memory,
1752 // respecting the maximum and minimum sizes of the heap.
1753 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
1754 julong reasonable_max = phys_mem / MaxRAMFraction;
1755
1756 if (phys_mem <= MaxHeapSize * MinRAMFraction) {
1757 // Small physical memory, so use a minimum fraction of it for the heap
1758 reasonable_max = phys_mem / MinRAMFraction;
1759 } else {
1760 // Not-small physical memory, so require a heap at least
1761 // as large as MaxHeapSize
1762 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize);
1763 }
1764 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) {
1765 // Limit the heap size to ErgoHeapSizeLimit
1766 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit);
1767 }
1768 if (UseCompressedOops) {
1769 // Limit the heap size to the maximum possible when using compressed oops
1770 julong max_coop_heap = (julong)max_heap_for_compressed_oops();
1771
1772 // HeapBaseMinAddress can be greater than default but not less than.
1773 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) {
1774 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) {
1775 // matches compressed oops printing flags
1776 if (PrintCompressedOopsMode || (PrintMiscellaneous && Verbose)) {
1777 jio_fprintf(defaultStream::error_stream(),
1778 "HeapBaseMinAddress must be at least " SIZE_FORMAT
1779 " (" SIZE_FORMAT "G) which is greater than value given "
1780 SIZE_FORMAT "\n",
1781 DefaultHeapBaseMinAddress,
1782 DefaultHeapBaseMinAddress/G,
1783 HeapBaseMinAddress);
1784 }
1785 FLAG_SET_ERGO(size_t, HeapBaseMinAddress, DefaultHeapBaseMinAddress);
1786 }
1787 }
1788
1789 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) {
1790 // Heap should be above HeapBaseMinAddress to get zero based compressed oops
1791 // but it should be not less than default MaxHeapSize.
1792 max_coop_heap -= HeapBaseMinAddress;
1793 }
1794 reasonable_max = MIN2(reasonable_max, max_coop_heap);
1795 }
1796 reasonable_max = limit_by_allocatable_memory(reasonable_max);
1797
1798 if (!FLAG_IS_DEFAULT(InitialHeapSize)) {
1799 // An initial heap size was specified on the command line,
1800 // so be sure that the maximum size is consistent. Done
1801 // after call to limit_by_allocatable_memory because that
1802 // method might reduce the allocation size.
1803 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize);
1804 }
1805
1806 if (PrintGCDetails && Verbose) {
1807 // Cannot use gclog_or_tty yet.
1808 tty->print_cr(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max);
1809 }
1810 FLAG_SET_ERGO(size_t, MaxHeapSize, (size_t)reasonable_max);
1811 }
1812
1813 // If the minimum or initial heap_size have not been set or requested to be set
1814 // ergonomically, set them accordingly.
1815 if (InitialHeapSize == 0 || min_heap_size() == 0) {
1816 julong reasonable_minimum = (julong)(OldSize + NewSize);
1817
1818 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize);
1819
1820 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum);
1821
1822 if (InitialHeapSize == 0) {
1823 julong reasonable_initial = phys_mem / InitialRAMFraction;
1824
1825 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size());
1826 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize);
1827
1828 reasonable_initial = limit_by_allocatable_memory(reasonable_initial);
1829
1830 if (PrintGCDetails && Verbose) {
1831 // Cannot use gclog_or_tty yet.
1832 tty->print_cr(" Initial heap size " SIZE_FORMAT, (size_t)reasonable_initial);
1833 }
1834 FLAG_SET_ERGO(size_t, InitialHeapSize, (size_t)reasonable_initial);
1835 }
1836 // If the minimum heap size has not been set (via -Xms),
1837 // synchronize with InitialHeapSize to avoid errors with the default value.
1838 if (min_heap_size() == 0) {
1839 set_min_heap_size(MIN2((size_t)reasonable_minimum, InitialHeapSize));
1840 if (PrintGCDetails && Verbose) {
1841 // Cannot use gclog_or_tty yet.
1842 tty->print_cr(" Minimum heap size " SIZE_FORMAT, min_heap_size());
1843 }
1844 }
1845 }
1846 }
1847
1848 // This must be called after ergonomics.
1849 void Arguments::set_bytecode_flags() {
1850 if (!RewriteBytecodes) {
1851 FLAG_SET_DEFAULT(RewriteFrequentPairs, false);
1852 }
1853 }
1854
1855 // Aggressive optimization flags -XX:+AggressiveOpts
1856 jint Arguments::set_aggressive_opts_flags() {
1857 #ifdef COMPILER2
1858 if (AggressiveUnboxing) {
1859 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
1860 FLAG_SET_DEFAULT(EliminateAutoBox, true);
1861 } else if (!EliminateAutoBox) {
1862 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled");
1863 AggressiveUnboxing = false;
1864 }
1865 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) {
1866 FLAG_SET_DEFAULT(DoEscapeAnalysis, true);
1867 } else if (!DoEscapeAnalysis) {
1868 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled");
1869 AggressiveUnboxing = false;
1870 }
1871 }
1872 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
1873 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
1874 FLAG_SET_DEFAULT(EliminateAutoBox, true);
1875 }
1876 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
1877 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000);
1878 }
1879
1880 // Feed the cache size setting into the JDK
1881 char buffer[1024];
1882 sprintf(buffer, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax);
1883 if (!add_property(buffer)) {
1884 return JNI_ENOMEM;
1885 }
1886 }
1887 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) {
1888 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500);
1889 }
1890 #endif
1891
1892 if (AggressiveOpts) {
1893 // Sample flag setting code
1894 // if (FLAG_IS_DEFAULT(EliminateZeroing)) {
1895 // FLAG_SET_DEFAULT(EliminateZeroing, true);
1896 // }
1897 }
1898
1899 return JNI_OK;
1900 }
1901
1902 //===========================================================================================================
1903 // Parsing of java.compiler property
1904
1905 void Arguments::process_java_compiler_argument(const char* arg) {
1906 // For backwards compatibility, Djava.compiler=NONE or ""
1907 // causes us to switch to -Xint mode UNLESS -Xdebug
1908 // is also specified.
1909 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) {
1910 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen.
1911 }
1912 }
1913
1914 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) {
1915 _sun_java_launcher = os::strdup_check_oom(launcher);
1916 }
1917
1918 bool Arguments::created_by_java_launcher() {
1919 assert(_sun_java_launcher != NULL, "property must have value");
1920 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0;
1921 }
1922
1923 bool Arguments::sun_java_launcher_is_altjvm() {
1924 return _sun_java_launcher_is_altjvm;
1925 }
1926
1927 //===========================================================================================================
1928 // Parsing of main arguments
1929
1930 // check if do gclog rotation
1931 // +UseGCLogFileRotation is a must,
1932 // no gc log rotation when log file not supplied or
1933 // NumberOfGCLogFiles is 0
1934 void check_gclog_consistency() {
1935 if (UseGCLogFileRotation) {
1936 if ((Arguments::gc_log_filename() == NULL) || (NumberOfGCLogFiles == 0)) {
1937 jio_fprintf(defaultStream::output_stream(),
1938 "To enable GC log rotation, use -Xloggc:<filename> -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=<num_of_files>\n"
1939 "where num_of_file > 0\n"
1940 "GC log rotation is turned off\n");
1941 UseGCLogFileRotation = false;
1942 }
1943 }
1944
1945 if (UseGCLogFileRotation && (GCLogFileSize != 0) && (GCLogFileSize < 8*K)) {
1946 if (FLAG_SET_CMDLINE(size_t, GCLogFileSize, 8*K) == Flag::SUCCESS) {
1947 jio_fprintf(defaultStream::output_stream(),
1948 "GCLogFileSize changed to minimum 8K\n");
1949 }
1950 }
1951 }
1952
1953 // This function is called for -Xloggc:<filename>, it can be used
1954 // to check if a given file name(or string) conforms to the following
1955 // specification:
1956 // A valid string only contains "[A-Z][a-z][0-9].-_%[p|t]"
1957 // %p and %t only allowed once. We only limit usage of filename not path
1958 bool is_filename_valid(const char *file_name) {
1959 const char* p = file_name;
1960 char file_sep = os::file_separator()[0];
1961 const char* cp;
1962 // skip prefix path
1963 for (cp = file_name; *cp != '\0'; cp++) {
1964 if (*cp == '/' || *cp == file_sep) {
1965 p = cp + 1;
1966 }
1967 }
1968
1969 int count_p = 0;
1970 int count_t = 0;
1971 while (*p != '\0') {
1972 if ((*p >= '0' && *p <= '9') ||
1973 (*p >= 'A' && *p <= 'Z') ||
1974 (*p >= 'a' && *p <= 'z') ||
1975 *p == '-' ||
1976 *p == '_' ||
1977 *p == '.') {
1978 p++;
1979 continue;
1980 }
1981 if (*p == '%') {
1982 if(*(p + 1) == 'p') {
1983 p += 2;
1984 count_p ++;
1985 continue;
1986 }
1987 if (*(p + 1) == 't') {
1988 p += 2;
1989 count_t ++;
1990 continue;
1991 }
1992 }
1993 return false;
1994 }
1995 return count_p < 2 && count_t < 2;
1996 }
1997
1998 // Check consistency of GC selection
1999 bool Arguments::check_gc_consistency() {
2000 check_gclog_consistency();
2001 // Ensure that the user has not selected conflicting sets
2002 // of collectors.
2003 uint i = 0;
2004 if (UseSerialGC) i++;
2005 if (UseConcMarkSweepGC) i++;
2006 if (UseParallelGC || UseParallelOldGC) i++;
2007 if (UseG1GC) i++;
2008 if (i > 1) {
2009 jio_fprintf(defaultStream::error_stream(),
2010 "Conflicting collector combinations in option list; "
2011 "please refer to the release notes for the combinations "
2012 "allowed\n");
2013 return false;
2014 }
2015
2016 if (UseConcMarkSweepGC && !UseParNewGC) {
2017 jio_fprintf(defaultStream::error_stream(),
2018 "It is not possible to combine the DefNew young collector with the CMS collector.\n");
2019 return false;
2020 }
2021
2022 if (UseParNewGC && !UseConcMarkSweepGC) {
2023 jio_fprintf(defaultStream::error_stream(),
2024 "It is not possible to combine the ParNew young collector with any collector other than CMS.\n");
2025 return false;
2026 }
2027
2028 return true;
2029 }
2030
2031 void Arguments::check_deprecated_gc_flags() {
2032 if (FLAG_IS_CMDLINE(UseParNewGC)) {
2033 warning("The UseParNewGC flag is deprecated and will likely be removed in a future release");
2034 }
2035 if (FLAG_IS_CMDLINE(MaxGCMinorPauseMillis)) {
2036 warning("Using MaxGCMinorPauseMillis as minor pause goal is deprecated"
2037 "and will likely be removed in future release");
2038 }
2039 if (FLAG_IS_CMDLINE(DefaultMaxRAMFraction)) {
2040 warning("DefaultMaxRAMFraction is deprecated and will likely be removed in a future release. "
2041 "Use MaxRAMFraction instead.");
2042 }
2043 }
2044
2045 // Check the consistency of vm_init_args
2046 bool Arguments::check_vm_args_consistency() {
2047 // Method for adding checks for flag consistency.
2048 // The intent is to warn the user of all possible conflicts,
2049 // before returning an error.
2050 // Note: Needs platform-dependent factoring.
2051 bool status = true;
2052
2053 if (TLABRefillWasteFraction == 0) {
2054 jio_fprintf(defaultStream::error_stream(),
2055 "TLABRefillWasteFraction should be a denominator, "
2056 "not " SIZE_FORMAT "\n",
2057 TLABRefillWasteFraction);
2058 status = false;
2059 }
2060
2061 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) {
2062 MarkSweepAlwaysCompactCount = 1; // Move objects every gc.
2063 }
2064
2065 if (UseParallelOldGC && ParallelOldGCSplitALot) {
2066 // Settings to encourage splitting.
2067 if (!FLAG_IS_CMDLINE(NewRatio)) {
2068 if (FLAG_SET_CMDLINE(uintx, NewRatio, 2) != Flag::SUCCESS) {
2069 status = false;
2070 }
2071 }
2072 if (!FLAG_IS_CMDLINE(ScavengeBeforeFullGC)) {
2073 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
2074 status = false;
2075 }
2076 }
2077 }
2078
2079 if (!(UseParallelGC || UseParallelOldGC) && FLAG_IS_DEFAULT(ScavengeBeforeFullGC)) {
2080 FLAG_SET_DEFAULT(ScavengeBeforeFullGC, false);
2081 }
2082
2083 if (GCTimeLimit == 100) {
2084 // Turn off gc-overhead-limit-exceeded checks
2085 FLAG_SET_DEFAULT(UseGCOverheadLimit, false);
2086 }
2087
2088 status = status && check_gc_consistency();
2089
2090 // CMS space iteration, which FLSVerifyAllHeapreferences entails,
2091 // insists that we hold the requisite locks so that the iteration is
2092 // MT-safe. For the verification at start-up and shut-down, we don't
2093 // yet have a good way of acquiring and releasing these locks,
2094 // which are not visible at the CollectedHeap level. We want to
2095 // be able to acquire these locks and then do the iteration rather
2096 // than just disable the lock verification. This will be fixed under
2097 // bug 4788986.
2098 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) {
2099 if (VerifyDuringStartup) {
2100 warning("Heap verification at start-up disabled "
2101 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
2102 VerifyDuringStartup = false; // Disable verification at start-up
2103 }
2104
2105 if (VerifyBeforeExit) {
2106 warning("Heap verification at shutdown disabled "
2107 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
2108 VerifyBeforeExit = false; // Disable verification at shutdown
2109 }
2110 }
2111
2112 // Note: only executed in non-PRODUCT mode
2113 if (!UseAsyncConcMarkSweepGC &&
2114 (ExplicitGCInvokesConcurrent ||
2115 ExplicitGCInvokesConcurrentAndUnloadsClasses)) {
2116 jio_fprintf(defaultStream::error_stream(),
2117 "error: +ExplicitGCInvokesConcurrent[AndUnloadsClasses] conflicts"
2118 " with -UseAsyncConcMarkSweepGC");
2119 status = false;
2120 }
2121
2122 if (PrintNMTStatistics) {
2123 #if INCLUDE_NMT
2124 if (MemTracker::tracking_level() == NMT_off) {
2125 #endif // INCLUDE_NMT
2126 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled");
2127 PrintNMTStatistics = false;
2128 #if INCLUDE_NMT
2129 }
2130 #endif
2131 }
2132
2133 // Check lower bounds of the code cache
2134 // Template Interpreter code is approximately 3X larger in debug builds.
2135 uint min_code_cache_size = CodeCacheMinimumUseSpace DEBUG_ONLY(* 3);
2136 if (InitialCodeCacheSize < (uintx)os::vm_page_size()) {
2137 jio_fprintf(defaultStream::error_stream(),
2138 "Invalid InitialCodeCacheSize=%dK. Must be at least %dK.\n", InitialCodeCacheSize/K,
2139 os::vm_page_size()/K);
2140 status = false;
2141 } else if (ReservedCodeCacheSize < InitialCodeCacheSize) {
2142 jio_fprintf(defaultStream::error_stream(),
2143 "Invalid ReservedCodeCacheSize: %dK. Must be at least InitialCodeCacheSize=%dK.\n",
2144 ReservedCodeCacheSize/K, InitialCodeCacheSize/K);
2145 status = false;
2146 } else if (ReservedCodeCacheSize < min_code_cache_size) {
2147 jio_fprintf(defaultStream::error_stream(),
2148 "Invalid ReservedCodeCacheSize=%dK. Must be at least %uK.\n", ReservedCodeCacheSize/K,
2149 min_code_cache_size/K);
2150 status = false;
2151 } else if (ReservedCodeCacheSize > CODE_CACHE_SIZE_LIMIT) {
2152 // Code cache size larger than CODE_CACHE_SIZE_LIMIT is not supported.
2153 jio_fprintf(defaultStream::error_stream(),
2154 "Invalid ReservedCodeCacheSize=%dM. Must be at most %uM.\n", ReservedCodeCacheSize/M,
2155 CODE_CACHE_SIZE_LIMIT/M);
2156 status = false;
2157 } else if (NonNMethodCodeHeapSize < min_code_cache_size){
2158 jio_fprintf(defaultStream::error_stream(),
2159 "Invalid NonNMethodCodeHeapSize=%dK. Must be at least %uK.\n", NonNMethodCodeHeapSize/K,
2160 min_code_cache_size/K);
2161 status = false;
2162 } else if ((!FLAG_IS_DEFAULT(NonNMethodCodeHeapSize) || !FLAG_IS_DEFAULT(ProfiledCodeHeapSize) || !FLAG_IS_DEFAULT(NonProfiledCodeHeapSize))
2163 && (NonNMethodCodeHeapSize + NonProfiledCodeHeapSize + ProfiledCodeHeapSize) != ReservedCodeCacheSize) {
2164 jio_fprintf(defaultStream::error_stream(),
2165 "Invalid code heap sizes: NonNMethodCodeHeapSize(%dK) + ProfiledCodeHeapSize(%dK) + NonProfiledCodeHeapSize(%dK) = %dK. Must be equal to ReservedCodeCacheSize = %uK.\n",
2166 NonNMethodCodeHeapSize/K, ProfiledCodeHeapSize/K, NonProfiledCodeHeapSize/K,
2167 (NonNMethodCodeHeapSize + ProfiledCodeHeapSize + NonProfiledCodeHeapSize)/K, ReservedCodeCacheSize/K);
2168 status = false;
2169 }
2170
2171 if (!FLAG_IS_DEFAULT(CICompilerCount) && !FLAG_IS_DEFAULT(CICompilerCountPerCPU) && CICompilerCountPerCPU) {
2172 warning("The VM option CICompilerCountPerCPU overrides CICompilerCount.");
2173 }
2174
2175 return status;
2176 }
2177
2178 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore,
2179 const char* option_type) {
2180 if (ignore) return false;
2181
2182 const char* spacer = " ";
2183 if (option_type == NULL) {
2184 option_type = ++spacer; // Set both to the empty string.
2185 }
2186
2187 if (os::obsolete_option(option)) {
2188 jio_fprintf(defaultStream::error_stream(),
2189 "Obsolete %s%soption: %s\n", option_type, spacer,
2190 option->optionString);
2191 return false;
2192 } else {
2193 jio_fprintf(defaultStream::error_stream(),
2194 "Unrecognized %s%soption: %s\n", option_type, spacer,
2195 option->optionString);
2196 return true;
2197 }
2198 }
2199
2200 static const char* user_assertion_options[] = {
2201 "-da", "-ea", "-disableassertions", "-enableassertions", 0
2202 };
2203
2204 static const char* system_assertion_options[] = {
2205 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0
2206 };
2207
2208 bool Arguments::parse_uintx(const char* value,
2209 uintx* uintx_arg,
2210 uintx min_size) {
2211
2212 // Check the sign first since atomull() parses only unsigned values.
2213 bool value_is_positive = !(*value == '-');
2214
2215 if (value_is_positive) {
2216 julong n;
2217 bool good_return = atomull(value, &n);
2218 if (good_return) {
2219 bool above_minimum = n >= min_size;
2220 bool value_is_too_large = n > max_uintx;
2221
2222 if (above_minimum && !value_is_too_large) {
2223 *uintx_arg = n;
2224 return true;
2225 }
2226 }
2227 }
2228 return false;
2229 }
2230
2231 Arguments::ArgsRange Arguments::parse_memory_size(const char* s,
2232 julong* long_arg,
2233 julong min_size) {
2234 if (!atomull(s, long_arg)) return arg_unreadable;
2235 return check_memory_size(*long_arg, min_size);
2236 }
2237
2238 // Parse JavaVMInitArgs structure
2239
2240 jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args,
2241 const JavaVMInitArgs *java_options_args,
2242 const JavaVMInitArgs *cmd_line_args) {
2243 // For components of the system classpath.
2244 SysClassPath scp(Arguments::get_sysclasspath());
2245 bool scp_assembly_required = false;
2246
2247 // Save default settings for some mode flags
2248 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
2249 Arguments::_UseOnStackReplacement = UseOnStackReplacement;
2250 Arguments::_ClipInlining = ClipInlining;
2251 Arguments::_BackgroundCompilation = BackgroundCompilation;
2252 if (TieredCompilation) {
2253 Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
2254 Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
2255 }
2256
2257 // Setup flags for mixed which is the default
2258 set_mode_flags(_mixed);
2259
2260 // Parse args structure generated from JAVA_TOOL_OPTIONS environment
2261 // variable (if present).
2262 jint result = parse_each_vm_init_arg(
2263 java_tool_options_args, &scp, &scp_assembly_required, Flag::ENVIRON_VAR);
2264 if (result != JNI_OK) {
2265 return result;
2266 }
2267
2268 // Parse args structure generated from the command line flags.
2269 result = parse_each_vm_init_arg(cmd_line_args, &scp, &scp_assembly_required,
2270 Flag::COMMAND_LINE);
2271 if (result != JNI_OK) {
2272 return result;
2273 }
2274
2275 // Parse args structure generated from the _JAVA_OPTIONS environment
2276 // variable (if present) (mimics classic VM)
2277 result = parse_each_vm_init_arg(
2278 java_options_args, &scp, &scp_assembly_required, Flag::ENVIRON_VAR);
2279 if (result != JNI_OK) {
2280 return result;
2281 }
2282
2283 // Do final processing now that all arguments have been parsed
2284 result = finalize_vm_init_args(&scp, scp_assembly_required);
2285 if (result != JNI_OK) {
2286 return result;
2287 }
2288
2289 return JNI_OK;
2290 }
2291
2292 // Checks if name in command-line argument -agent{lib,path}:name[=options]
2293 // represents a valid JDWP agent. is_path==true denotes that we
2294 // are dealing with -agentpath (case where name is a path), otherwise with
2295 // -agentlib
2296 bool valid_jdwp_agent(char *name, bool is_path) {
2297 char *_name;
2298 const char *_jdwp = "jdwp";
2299 size_t _len_jdwp, _len_prefix;
2300
2301 if (is_path) {
2302 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) {
2303 return false;
2304 }
2305
2306 _name++; // skip past last path separator
2307 _len_prefix = strlen(JNI_LIB_PREFIX);
2308
2309 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) {
2310 return false;
2311 }
2312
2313 _name += _len_prefix;
2314 _len_jdwp = strlen(_jdwp);
2315
2316 if (strncmp(_name, _jdwp, _len_jdwp) == 0) {
2317 _name += _len_jdwp;
2318 }
2319 else {
2320 return false;
2321 }
2322
2323 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) {
2324 return false;
2325 }
2326
2327 return true;
2328 }
2329
2330 if (strcmp(name, _jdwp) == 0) {
2331 return true;
2332 }
2333
2334 return false;
2335 }
2336
2337 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args,
2338 SysClassPath* scp_p,
2339 bool* scp_assembly_required_p,
2340 Flag::Flags origin) {
2341 // Remaining part of option string
2342 const char* tail;
2343
2344 // iterate over arguments
2345 for (int index = 0; index < args->nOptions; index++) {
2346 bool is_absolute_path = false; // for -agentpath vs -agentlib
2347
2348 const JavaVMOption* option = args->options + index;
2349
2350 if (!match_option(option, "-Djava.class.path", &tail) &&
2351 !match_option(option, "-Dsun.java.command", &tail) &&
2352 !match_option(option, "-Dsun.java.launcher", &tail)) {
2353
2354 // add all jvm options to the jvm_args string. This string
2355 // is used later to set the java.vm.args PerfData string constant.
2356 // the -Djava.class.path and the -Dsun.java.command options are
2357 // omitted from jvm_args string as each have their own PerfData
2358 // string constant object.
2359 build_jvm_args(option->optionString);
2360 }
2361
2362 // -verbose:[class/gc/jni]
2363 if (match_option(option, "-verbose", &tail)) {
2364 if (!strcmp(tail, ":class") || !strcmp(tail, "")) {
2365 if (FLAG_SET_CMDLINE(bool, TraceClassLoading, true) != Flag::SUCCESS) {
2366 return JNI_EINVAL;
2367 }
2368 if (FLAG_SET_CMDLINE(bool, TraceClassUnloading, true) != Flag::SUCCESS) {
2369 return JNI_EINVAL;
2370 }
2371 } else if (!strcmp(tail, ":gc")) {
2372 if (FLAG_SET_CMDLINE(bool, PrintGC, true) != Flag::SUCCESS) {
2373 return JNI_EINVAL;
2374 }
2375 } else if (!strcmp(tail, ":jni")) {
2376 if (FLAG_SET_CMDLINE(bool, PrintJNIResolving, true) != Flag::SUCCESS) {
2377 return JNI_EINVAL;
2378 }
2379 }
2380 // -da / -ea / -disableassertions / -enableassertions
2381 // These accept an optional class/package name separated by a colon, e.g.,
2382 // -da:java.lang.Thread.
2383 } else if (match_option(option, user_assertion_options, &tail, true)) {
2384 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2385 if (*tail == '\0') {
2386 JavaAssertions::setUserClassDefault(enable);
2387 } else {
2388 assert(*tail == ':', "bogus match by match_option()");
2389 JavaAssertions::addOption(tail + 1, enable);
2390 }
2391 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions
2392 } else if (match_option(option, system_assertion_options, &tail, false)) {
2393 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2394 JavaAssertions::setSystemClassDefault(enable);
2395 // -bootclasspath:
2396 } else if (match_option(option, "-Xbootclasspath:", &tail)) {
2397 scp_p->reset_path(tail);
2398 *scp_assembly_required_p = true;
2399 // -bootclasspath/a:
2400 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) {
2401 scp_p->add_suffix(tail);
2402 *scp_assembly_required_p = true;
2403 // -bootclasspath/p:
2404 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) {
2405 scp_p->add_prefix(tail);
2406 *scp_assembly_required_p = true;
2407 // -Xrun
2408 } else if (match_option(option, "-Xrun", &tail)) {
2409 if (tail != NULL) {
2410 const char* pos = strchr(tail, ':');
2411 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2412 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len);
2413 name[len] = '\0';
2414
2415 char *options = NULL;
2416 if(pos != NULL) {
2417 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied.
2418 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtInternal), pos+1, len2);
2419 }
2420 #if !INCLUDE_JVMTI
2421 if (strcmp(name, "jdwp") == 0) {
2422 jio_fprintf(defaultStream::error_stream(),
2423 "Debugging agents are not supported in this VM\n");
2424 return JNI_ERR;
2425 }
2426 #endif // !INCLUDE_JVMTI
2427 add_init_library(name, options);
2428 }
2429 // -agentlib and -agentpath
2430 } else if (match_option(option, "-agentlib:", &tail) ||
2431 (is_absolute_path = match_option(option, "-agentpath:", &tail))) {
2432 if(tail != NULL) {
2433 const char* pos = strchr(tail, '=');
2434 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2435 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len);
2436 name[len] = '\0';
2437
2438 char *options = NULL;
2439 if(pos != NULL) {
2440 options = os::strdup_check_oom(pos + 1, mtInternal);
2441 }
2442 #if !INCLUDE_JVMTI
2443 if (valid_jdwp_agent(name, is_absolute_path)) {
2444 jio_fprintf(defaultStream::error_stream(),
2445 "Debugging agents are not supported in this VM\n");
2446 return JNI_ERR;
2447 }
2448 #endif // !INCLUDE_JVMTI
2449 add_init_agent(name, options, is_absolute_path);
2450 }
2451 // -javaagent
2452 } else if (match_option(option, "-javaagent:", &tail)) {
2453 #if !INCLUDE_JVMTI
2454 jio_fprintf(defaultStream::error_stream(),
2455 "Instrumentation agents are not supported in this VM\n");
2456 return JNI_ERR;
2457 #else
2458 if(tail != NULL) {
2459 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1, mtInternal), tail);
2460 add_init_agent("instrument", options, false);
2461 }
2462 #endif // !INCLUDE_JVMTI
2463 // -Xnoclassgc
2464 } else if (match_option(option, "-Xnoclassgc")) {
2465 if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != Flag::SUCCESS) {
2466 return JNI_EINVAL;
2467 }
2468 // -Xconcgc
2469 } else if (match_option(option, "-Xconcgc")) {
2470 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true) != Flag::SUCCESS) {
2471 return JNI_EINVAL;
2472 }
2473 // -Xnoconcgc
2474 } else if (match_option(option, "-Xnoconcgc")) {
2475 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false) != Flag::SUCCESS) {
2476 return JNI_EINVAL;
2477 }
2478 // -Xbatch
2479 } else if (match_option(option, "-Xbatch")) {
2480 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
2481 return JNI_EINVAL;
2482 }
2483 // -Xmn for compatibility with other JVM vendors
2484 } else if (match_option(option, "-Xmn", &tail)) {
2485 julong long_initial_young_size = 0;
2486 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1);
2487 if (errcode != arg_in_range) {
2488 jio_fprintf(defaultStream::error_stream(),
2489 "Invalid initial young generation size: %s\n", option->optionString);
2490 describe_range_error(errcode);
2491 return JNI_EINVAL;
2492 }
2493 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
2494 return JNI_EINVAL;
2495 }
2496 if (FLAG_SET_CMDLINE(size_t, NewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
2497 return JNI_EINVAL;
2498 }
2499 // -Xms
2500 } else if (match_option(option, "-Xms", &tail)) {
2501 julong long_initial_heap_size = 0;
2502 // an initial heap size of 0 means automatically determine
2503 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0);
2504 if (errcode != arg_in_range) {
2505 jio_fprintf(defaultStream::error_stream(),
2506 "Invalid initial heap size: %s\n", option->optionString);
2507 describe_range_error(errcode);
2508 return JNI_EINVAL;
2509 }
2510 set_min_heap_size((size_t)long_initial_heap_size);
2511 // Currently the minimum size and the initial heap sizes are the same.
2512 // Can be overridden with -XX:InitialHeapSize.
2513 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, (size_t)long_initial_heap_size) != Flag::SUCCESS) {
2514 return JNI_EINVAL;
2515 }
2516 // -Xmx
2517 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) {
2518 julong long_max_heap_size = 0;
2519 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1);
2520 if (errcode != arg_in_range) {
2521 jio_fprintf(defaultStream::error_stream(),
2522 "Invalid maximum heap size: %s\n", option->optionString);
2523 describe_range_error(errcode);
2524 return JNI_EINVAL;
2525 }
2526 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, (size_t)long_max_heap_size) != Flag::SUCCESS) {
2527 return JNI_EINVAL;
2528 }
2529 // Xmaxf
2530 } else if (match_option(option, "-Xmaxf", &tail)) {
2531 char* err;
2532 int maxf = (int)(strtod(tail, &err) * 100);
2533 if (*err != '\0' || *tail == '\0') {
2534 jio_fprintf(defaultStream::error_stream(),
2535 "Bad max heap free percentage size: %s\n",
2536 option->optionString);
2537 return JNI_EINVAL;
2538 } else {
2539 if (FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf) != Flag::SUCCESS) {
2540 return JNI_EINVAL;
2541 }
2542 }
2543 // Xminf
2544 } else if (match_option(option, "-Xminf", &tail)) {
2545 char* err;
2546 int minf = (int)(strtod(tail, &err) * 100);
2547 if (*err != '\0' || *tail == '\0') {
2548 jio_fprintf(defaultStream::error_stream(),
2549 "Bad min heap free percentage size: %s\n",
2550 option->optionString);
2551 return JNI_EINVAL;
2552 } else {
2553 if (FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf) != Flag::SUCCESS) {
2554 return JNI_EINVAL;
2555 }
2556 }
2557 // -Xss
2558 } else if (match_option(option, "-Xss", &tail)) {
2559 julong long_ThreadStackSize = 0;
2560 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000);
2561 if (errcode != arg_in_range) {
2562 jio_fprintf(defaultStream::error_stream(),
2563 "Invalid thread stack size: %s\n", option->optionString);
2564 describe_range_error(errcode);
2565 return JNI_EINVAL;
2566 }
2567 // Internally track ThreadStackSize in units of 1024 bytes.
2568 if (FLAG_SET_CMDLINE(intx, ThreadStackSize,
2569 round_to((int)long_ThreadStackSize, K) / K) != Flag::SUCCESS) {
2570 return JNI_EINVAL;
2571 }
2572 // -Xoss, -Xsqnopause, -Xoptimize, -Xboundthreads
2573 } else if (match_option(option, "-Xoss", &tail) ||
2574 match_option(option, "-Xsqnopause") ||
2575 match_option(option, "-Xoptimize") ||
2576 match_option(option, "-Xboundthreads")) {
2577 // All these options are deprecated in JDK 9 and will be removed in a future release
2578 char version[256];
2579 JDK_Version::jdk(9).to_string(version, sizeof(version));
2580 warning("ignoring option %s; support was removed in %s", option->optionString, version);
2581 } else if (match_option(option, "-XX:CodeCacheExpansionSize=", &tail)) {
2582 julong long_CodeCacheExpansionSize = 0;
2583 ArgsRange errcode = parse_memory_size(tail, &long_CodeCacheExpansionSize, os::vm_page_size());
2584 if (errcode != arg_in_range) {
2585 jio_fprintf(defaultStream::error_stream(),
2586 "Invalid argument: %s. Must be at least %luK.\n", option->optionString,
2587 os::vm_page_size()/K);
2588 return JNI_EINVAL;
2589 }
2590 if (FLAG_SET_CMDLINE(uintx, CodeCacheExpansionSize, (uintx)long_CodeCacheExpansionSize) != Flag::SUCCESS) {
2591 return JNI_EINVAL;
2592 }
2593 } else if (match_option(option, "-Xmaxjitcodesize", &tail) ||
2594 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) {
2595 julong long_ReservedCodeCacheSize = 0;
2596
2597 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1);
2598 if (errcode != arg_in_range) {
2599 jio_fprintf(defaultStream::error_stream(),
2600 "Invalid maximum code cache size: %s.\n", option->optionString);
2601 return JNI_EINVAL;
2602 }
2603 if (FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != Flag::SUCCESS) {
2604 return JNI_EINVAL;
2605 }
2606 // -XX:NonNMethodCodeHeapSize=
2607 } else if (match_option(option, "-XX:NonNMethodCodeHeapSize=", &tail)) {
2608 julong long_NonNMethodCodeHeapSize = 0;
2609
2610 ArgsRange errcode = parse_memory_size(tail, &long_NonNMethodCodeHeapSize, 1);
2611 if (errcode != arg_in_range) {
2612 jio_fprintf(defaultStream::error_stream(),
2613 "Invalid maximum non-nmethod code heap size: %s.\n", option->optionString);
2614 return JNI_EINVAL;
2615 }
2616 if (FLAG_SET_CMDLINE(uintx, NonNMethodCodeHeapSize, (uintx)long_NonNMethodCodeHeapSize) != Flag::SUCCESS) {
2617 return JNI_EINVAL;
2618 }
2619 // -XX:ProfiledCodeHeapSize=
2620 } else if (match_option(option, "-XX:ProfiledCodeHeapSize=", &tail)) {
2621 julong long_ProfiledCodeHeapSize = 0;
2622
2623 ArgsRange errcode = parse_memory_size(tail, &long_ProfiledCodeHeapSize, 1);
2624 if (errcode != arg_in_range) {
2625 jio_fprintf(defaultStream::error_stream(),
2626 "Invalid maximum profiled code heap size: %s.\n", option->optionString);
2627 return JNI_EINVAL;
2628 }
2629 if (FLAG_SET_CMDLINE(uintx, ProfiledCodeHeapSize, (uintx)long_ProfiledCodeHeapSize) != Flag::SUCCESS) {
2630 return JNI_EINVAL;
2631 }
2632 // -XX:NonProfiledCodeHeapSizee=
2633 } else if (match_option(option, "-XX:NonProfiledCodeHeapSize=", &tail)) {
2634 julong long_NonProfiledCodeHeapSize = 0;
2635
2636 ArgsRange errcode = parse_memory_size(tail, &long_NonProfiledCodeHeapSize, 1);
2637 if (errcode != arg_in_range) {
2638 jio_fprintf(defaultStream::error_stream(),
2639 "Invalid maximum non-profiled code heap size: %s.\n", option->optionString);
2640 return JNI_EINVAL;
2641 }
2642 if (FLAG_SET_CMDLINE(uintx, NonProfiledCodeHeapSize, (uintx)long_NonProfiledCodeHeapSize) != Flag::SUCCESS) {
2643 return JNI_EINVAL;
2644 }
2645 // -green
2646 } else if (match_option(option, "-green")) {
2647 jio_fprintf(defaultStream::error_stream(),
2648 "Green threads support not available\n");
2649 return JNI_EINVAL;
2650 // -native
2651 } else if (match_option(option, "-native")) {
2652 // HotSpot always uses native threads, ignore silently for compatibility
2653 // -Xrs
2654 } else if (match_option(option, "-Xrs")) {
2655 // Classic/EVM option, new functionality
2656 if (FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true) != Flag::SUCCESS) {
2657 return JNI_EINVAL;
2658 }
2659 } else if (match_option(option, "-Xusealtsigs")) {
2660 // change default internal VM signals used - lower case for back compat
2661 if (FLAG_SET_CMDLINE(bool, UseAltSigs, true) != Flag::SUCCESS) {
2662 return JNI_EINVAL;
2663 }
2664 // -Xprof
2665 } else if (match_option(option, "-Xprof")) {
2666 #if INCLUDE_FPROF
2667 _has_profile = true;
2668 #else // INCLUDE_FPROF
2669 jio_fprintf(defaultStream::error_stream(),
2670 "Flat profiling is not supported in this VM.\n");
2671 return JNI_ERR;
2672 #endif // INCLUDE_FPROF
2673 // -Xconcurrentio
2674 } else if (match_option(option, "-Xconcurrentio")) {
2675 if (FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true) != Flag::SUCCESS) {
2676 return JNI_EINVAL;
2677 }
2678 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
2679 return JNI_EINVAL;
2680 }
2681 if (FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1) != Flag::SUCCESS) {
2682 return JNI_EINVAL;
2683 }
2684 if (FLAG_SET_CMDLINE(bool, UseTLAB, false) != Flag::SUCCESS) {
2685 return JNI_EINVAL;
2686 }
2687 if (FLAG_SET_CMDLINE(size_t, NewSizeThreadIncrease, 16 * K) != Flag::SUCCESS) { // 20Kb per thread added to new generation
2688 return JNI_EINVAL;
2689 }
2690
2691 // -Xinternalversion
2692 } else if (match_option(option, "-Xinternalversion")) {
2693 jio_fprintf(defaultStream::output_stream(), "%s\n",
2694 VM_Version::internal_vm_info_string());
2695 vm_exit(0);
2696 #ifndef PRODUCT
2697 // -Xprintflags
2698 } else if (match_option(option, "-Xprintflags")) {
2699 CommandLineFlags::printFlags(tty, false);
2700 vm_exit(0);
2701 #endif
2702 // -D
2703 } else if (match_option(option, "-D", &tail)) {
2704 const char* value;
2705 if (match_option(option, "-Djava.endorsed.dirs=", &value) &&
2706 *value!= '\0' && strcmp(value, "\"\"") != 0) {
2707 // abort if -Djava.endorsed.dirs is set
2708 jio_fprintf(defaultStream::output_stream(),
2709 "-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n"
2710 "in modular form will be supported via the concept of upgradeable modules.\n", value);
2711 return JNI_EINVAL;
2712 }
2713 if (match_option(option, "-Djava.ext.dirs=", &value) &&
2714 *value != '\0' && strcmp(value, "\"\"") != 0) {
2715 // abort if -Djava.ext.dirs is set
2716 jio_fprintf(defaultStream::output_stream(),
2717 "-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value);
2718 return JNI_EINVAL;
2719 }
2720
2721 if (!add_property(tail)) {
2722 return JNI_ENOMEM;
2723 }
2724 // Out of the box management support
2725 if (match_option(option, "-Dcom.sun.management", &tail)) {
2726 #if INCLUDE_MANAGEMENT
2727 if (FLAG_SET_CMDLINE(bool, ManagementServer, true) != Flag::SUCCESS) {
2728 return JNI_EINVAL;
2729 }
2730 #else
2731 jio_fprintf(defaultStream::output_stream(),
2732 "-Dcom.sun.management is not supported in this VM.\n");
2733 return JNI_ERR;
2734 #endif
2735 }
2736 // -Xint
2737 } else if (match_option(option, "-Xint")) {
2738 set_mode_flags(_int);
2739 // -Xmixed
2740 } else if (match_option(option, "-Xmixed")) {
2741 set_mode_flags(_mixed);
2742 // -Xcomp
2743 } else if (match_option(option, "-Xcomp")) {
2744 // for testing the compiler; turn off all flags that inhibit compilation
2745 set_mode_flags(_comp);
2746 // -Xshare:dump
2747 } else if (match_option(option, "-Xshare:dump")) {
2748 if (FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true) != Flag::SUCCESS) {
2749 return JNI_EINVAL;
2750 }
2751 set_mode_flags(_int); // Prevent compilation, which creates objects
2752 // -Xshare:on
2753 } else if (match_option(option, "-Xshare:on")) {
2754 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
2755 return JNI_EINVAL;
2756 }
2757 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
2758 return JNI_EINVAL;
2759 }
2760 // -Xshare:auto
2761 } else if (match_option(option, "-Xshare:auto")) {
2762 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
2763 return JNI_EINVAL;
2764 }
2765 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
2766 return JNI_EINVAL;
2767 }
2768 // -Xshare:off
2769 } else if (match_option(option, "-Xshare:off")) {
2770 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, false) != Flag::SUCCESS) {
2771 return JNI_EINVAL;
2772 }
2773 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
2774 return JNI_EINVAL;
2775 }
2776 // -Xverify
2777 } else if (match_option(option, "-Xverify", &tail)) {
2778 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) {
2779 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true) != Flag::SUCCESS) {
2780 return JNI_EINVAL;
2781 }
2782 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
2783 return JNI_EINVAL;
2784 }
2785 } else if (strcmp(tail, ":remote") == 0) {
2786 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
2787 return JNI_EINVAL;
2788 }
2789 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
2790 return JNI_EINVAL;
2791 }
2792 } else if (strcmp(tail, ":none") == 0) {
2793 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
2794 return JNI_EINVAL;
2795 }
2796 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false) != Flag::SUCCESS) {
2797 return JNI_EINVAL;
2798 }
2799 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) {
2800 return JNI_EINVAL;
2801 }
2802 // -Xdebug
2803 } else if (match_option(option, "-Xdebug")) {
2804 // note this flag has been used, then ignore
2805 set_xdebug_mode(true);
2806 // -Xnoagent
2807 } else if (match_option(option, "-Xnoagent")) {
2808 // For compatibility with classic. HotSpot refuses to load the old style agent.dll.
2809 } else if (match_option(option, "-Xloggc:", &tail)) {
2810 // Redirect GC output to the file. -Xloggc:<filename>
2811 // ostream_init_log(), when called will use this filename
2812 // to initialize a fileStream.
2813 _gc_log_filename = os::strdup_check_oom(tail);
2814 if (!is_filename_valid(_gc_log_filename)) {
2815 jio_fprintf(defaultStream::output_stream(),
2816 "Invalid file name for use with -Xloggc: Filename can only contain the "
2817 "characters [A-Z][a-z][0-9]-_.%%[p|t] but it has been %s\n"
2818 "Note %%p or %%t can only be used once\n", _gc_log_filename);
2819 return JNI_EINVAL;
2820 }
2821 if (FLAG_SET_CMDLINE(bool, PrintGC, true) != Flag::SUCCESS) {
2822 return JNI_EINVAL;
2823 }
2824 if (FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true) != Flag::SUCCESS) {
2825 return JNI_EINVAL;
2826 }
2827 // JNI hooks
2828 } else if (match_option(option, "-Xcheck", &tail)) {
2829 if (!strcmp(tail, ":jni")) {
2830 #if !INCLUDE_JNI_CHECK
2831 warning("JNI CHECKING is not supported in this VM");
2832 #else
2833 CheckJNICalls = true;
2834 #endif // INCLUDE_JNI_CHECK
2835 } else if (is_bad_option(option, args->ignoreUnrecognized,
2836 "check")) {
2837 return JNI_EINVAL;
2838 }
2839 } else if (match_option(option, "vfprintf")) {
2840 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo);
2841 } else if (match_option(option, "exit")) {
2842 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo);
2843 } else if (match_option(option, "abort")) {
2844 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo);
2845 // -XX:+AggressiveHeap
2846 } else if (match_option(option, "-XX:+AggressiveHeap")) {
2847
2848 // This option inspects the machine and attempts to set various
2849 // parameters to be optimal for long-running, memory allocation
2850 // intensive jobs. It is intended for machines with large
2851 // amounts of cpu and memory.
2852
2853 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit
2854 // VM, but we may not be able to represent the total physical memory
2855 // available (like having 8gb of memory on a box but using a 32bit VM).
2856 // Thus, we need to make sure we're using a julong for intermediate
2857 // calculations.
2858 julong initHeapSize;
2859 julong total_memory = os::physical_memory();
2860
2861 if (total_memory < (julong)256*M) {
2862 jio_fprintf(defaultStream::error_stream(),
2863 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n");
2864 vm_exit(1);
2865 }
2866
2867 // The heap size is half of available memory, or (at most)
2868 // all of possible memory less 160mb (leaving room for the OS
2869 // when using ISM). This is the maximum; because adaptive sizing
2870 // is turned on below, the actual space used may be smaller.
2871
2872 initHeapSize = MIN2(total_memory / (julong)2,
2873 total_memory - (julong)160*M);
2874
2875 initHeapSize = limit_by_allocatable_memory(initHeapSize);
2876
2877 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
2878 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, initHeapSize) != Flag::SUCCESS) {
2879 return JNI_EINVAL;
2880 }
2881 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, initHeapSize) != Flag::SUCCESS) {
2882 return JNI_EINVAL;
2883 }
2884 // Currently the minimum size and the initial heap sizes are the same.
2885 set_min_heap_size(initHeapSize);
2886 }
2887 if (FLAG_IS_DEFAULT(NewSize)) {
2888 // Make the young generation 3/8ths of the total heap.
2889 if (FLAG_SET_CMDLINE(size_t, NewSize,
2890 ((julong)MaxHeapSize / (julong)8) * (julong)3) != Flag::SUCCESS) {
2891 return JNI_EINVAL;
2892 }
2893 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, NewSize) != Flag::SUCCESS) {
2894 return JNI_EINVAL;
2895 }
2896 }
2897
2898 #if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
2899 FLAG_SET_DEFAULT(UseLargePages, true);
2900 #endif
2901
2902 // Increase some data structure sizes for efficiency
2903 if (FLAG_SET_CMDLINE(size_t, BaseFootPrintEstimate, MaxHeapSize) != Flag::SUCCESS) {
2904 return JNI_EINVAL;
2905 }
2906 if (FLAG_SET_CMDLINE(bool, ResizeTLAB, false) != Flag::SUCCESS) {
2907 return JNI_EINVAL;
2908 }
2909 if (FLAG_SET_CMDLINE(size_t, TLABSize, 256*K) != Flag::SUCCESS) {
2910 return JNI_EINVAL;
2911 }
2912
2913 // See the OldPLABSize comment below, but replace 'after promotion'
2914 // with 'after copying'. YoungPLABSize is the size of the survivor
2915 // space per-gc-thread buffers. The default is 4kw.
2916 if (FLAG_SET_CMDLINE(size_t, YoungPLABSize, 256*K) != Flag::SUCCESS) { // Note: this is in words
2917 return JNI_EINVAL;
2918 }
2919
2920 // OldPLABSize is the size of the buffers in the old gen that
2921 // UseParallelGC uses to promote live data that doesn't fit in the
2922 // survivor spaces. At any given time, there's one for each gc thread.
2923 // The default size is 1kw. These buffers are rarely used, since the
2924 // survivor spaces are usually big enough. For specjbb, however, there
2925 // are occasions when there's lots of live data in the young gen
2926 // and we end up promoting some of it. We don't have a definite
2927 // explanation for why bumping OldPLABSize helps, but the theory
2928 // is that a bigger PLAB results in retaining something like the
2929 // original allocation order after promotion, which improves mutator
2930 // locality. A minor effect may be that larger PLABs reduce the
2931 // number of PLAB allocation events during gc. The value of 8kw
2932 // was arrived at by experimenting with specjbb.
2933 if (FLAG_SET_CMDLINE(size_t, OldPLABSize, 8*K) != Flag::SUCCESS) { // Note: this is in words
2934 return JNI_EINVAL;
2935 }
2936
2937 // Enable parallel GC and adaptive generation sizing
2938 if (FLAG_SET_CMDLINE(bool, UseParallelGC, true) != Flag::SUCCESS) {
2939 return JNI_EINVAL;
2940 }
2941 FLAG_SET_DEFAULT(ParallelGCThreads,
2942 Abstract_VM_Version::parallel_worker_threads());
2943
2944 // Encourage steady state memory management
2945 if (FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100) != Flag::SUCCESS) {
2946 return JNI_EINVAL;
2947 }
2948
2949 // This appears to improve mutator locality
2950 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
2951 return JNI_EINVAL;
2952 }
2953
2954 // Get around early Solaris scheduling bug
2955 // (affinity vs other jobs on system)
2956 // but disallow DR and offlining (5008695).
2957 if (FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true) != Flag::SUCCESS) {
2958 return JNI_EINVAL;
2959 }
2960
2961 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure;
2962 // and the last option wins.
2963 } else if (match_option(option, "-XX:+NeverTenure")) {
2964 if (FLAG_SET_CMDLINE(bool, NeverTenure, true) != Flag::SUCCESS) {
2965 return JNI_EINVAL;
2966 }
2967 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
2968 return JNI_EINVAL;
2969 }
2970 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1) != Flag::SUCCESS) {
2971 return JNI_EINVAL;
2972 }
2973 } else if (match_option(option, "-XX:+AlwaysTenure")) {
2974 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
2975 return JNI_EINVAL;
2976 }
2977 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
2978 return JNI_EINVAL;
2979 }
2980 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0) != Flag::SUCCESS) {
2981 return JNI_EINVAL;
2982 }
2983 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) {
2984 uintx max_tenuring_thresh = 0;
2985 if (!parse_uintx(tail, &max_tenuring_thresh, 0)) {
2986 jio_fprintf(defaultStream::error_stream(),
2987 "Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail);
2988 return JNI_EINVAL;
2989 }
2990
2991 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh) != Flag::SUCCESS) {
2992 return JNI_EINVAL;
2993 }
2994
2995 if (MaxTenuringThreshold == 0) {
2996 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
2997 return JNI_EINVAL;
2998 }
2999 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
3000 return JNI_EINVAL;
3001 }
3002 } else {
3003 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3004 return JNI_EINVAL;
3005 }
3006 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
3007 return JNI_EINVAL;
3008 }
3009 }
3010 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) {
3011 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false) != Flag::SUCCESS) {
3012 return JNI_EINVAL;
3013 }
3014 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true) != Flag::SUCCESS) {
3015 return JNI_EINVAL;
3016 }
3017 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) {
3018 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false) != Flag::SUCCESS) {
3019 return JNI_EINVAL;
3020 }
3021 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true) != Flag::SUCCESS) {
3022 return JNI_EINVAL;
3023 }
3024 } else if (match_option(option, "-XX:+ExtendedDTraceProbes")) {
3025 #if defined(DTRACE_ENABLED)
3026 if (FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true) != Flag::SUCCESS) {
3027 return JNI_EINVAL;
3028 }
3029 if (FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true) != Flag::SUCCESS) {
3030 return JNI_EINVAL;
3031 }
3032 if (FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true) != Flag::SUCCESS) {
3033 return JNI_EINVAL;
3034 }
3035 if (FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true) != Flag::SUCCESS) {
3036 return JNI_EINVAL;
3037 }
3038 #else // defined(DTRACE_ENABLED)
3039 jio_fprintf(defaultStream::error_stream(),
3040 "ExtendedDTraceProbes flag is not applicable for this configuration\n");
3041 return JNI_EINVAL;
3042 #endif // defined(DTRACE_ENABLED)
3043 #ifdef ASSERT
3044 } else if (match_option(option, "-XX:+FullGCALot")) {
3045 if (FLAG_SET_CMDLINE(bool, FullGCALot, true) != Flag::SUCCESS) {
3046 return JNI_EINVAL;
3047 }
3048 // disable scavenge before parallel mark-compact
3049 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
3050 return JNI_EINVAL;
3051 }
3052 #endif
3053 } else if (match_option(option, "-XX:CMSMarkStackSize=", &tail) ||
3054 match_option(option, "-XX:G1MarkStackSize=", &tail)) {
3055 julong stack_size = 0;
3056 ArgsRange errcode = parse_memory_size(tail, &stack_size, 1);
3057 if (errcode != arg_in_range) {
3058 jio_fprintf(defaultStream::error_stream(),
3059 "Invalid mark stack size: %s\n", option->optionString);
3060 describe_range_error(errcode);
3061 return JNI_EINVAL;
3062 }
3063 jio_fprintf(defaultStream::error_stream(),
3064 "Please use -XX:MarkStackSize in place of "
3065 "-XX:CMSMarkStackSize or -XX:G1MarkStackSize in the future\n");
3066 if (FLAG_SET_CMDLINE(size_t, MarkStackSize, stack_size) != Flag::SUCCESS) {
3067 return JNI_EINVAL;
3068 }
3069 } else if (match_option(option, "-XX:CMSMarkStackSizeMax=", &tail)) {
3070 julong max_stack_size = 0;
3071 ArgsRange errcode = parse_memory_size(tail, &max_stack_size, 1);
3072 if (errcode != arg_in_range) {
3073 jio_fprintf(defaultStream::error_stream(),
3074 "Invalid maximum mark stack size: %s\n",
3075 option->optionString);
3076 describe_range_error(errcode);
3077 return JNI_EINVAL;
3078 }
3079 jio_fprintf(defaultStream::error_stream(),
3080 "Please use -XX:MarkStackSizeMax in place of "
3081 "-XX:CMSMarkStackSizeMax in the future\n");
3082 if (FLAG_SET_CMDLINE(size_t, MarkStackSizeMax, max_stack_size) != Flag::SUCCESS) {
3083 return JNI_EINVAL;
3084 }
3085 } else if (match_option(option, "-XX:ParallelMarkingThreads=", &tail) ||
3086 match_option(option, "-XX:ParallelCMSThreads=", &tail)) {
3087 uintx conc_threads = 0;
3088 if (!parse_uintx(tail, &conc_threads, 1)) {
3089 jio_fprintf(defaultStream::error_stream(),
3090 "Invalid concurrent threads: %s\n", option->optionString);
3091 return JNI_EINVAL;
3092 }
3093 jio_fprintf(defaultStream::error_stream(),
3094 "Please use -XX:ConcGCThreads in place of "
3095 "-XX:ParallelMarkingThreads or -XX:ParallelCMSThreads in the future\n");
3096 if (FLAG_SET_CMDLINE(uint, ConcGCThreads, conc_threads) != Flag::SUCCESS) {
3097 return JNI_EINVAL;
3098 }
3099 } else if (match_option(option, "-XX:MaxDirectMemorySize=", &tail)) {
3100 julong max_direct_memory_size = 0;
3101 ArgsRange errcode = parse_memory_size(tail, &max_direct_memory_size, 0);
3102 if (errcode != arg_in_range) {
3103 jio_fprintf(defaultStream::error_stream(),
3104 "Invalid maximum direct memory size: %s\n",
3105 option->optionString);
3106 describe_range_error(errcode);
3107 return JNI_EINVAL;
3108 }
3109 if (FLAG_SET_CMDLINE(size_t, MaxDirectMemorySize, max_direct_memory_size) != Flag::SUCCESS) {
3110 return JNI_EINVAL;
3111 }
3112 #if !INCLUDE_MANAGEMENT
3113 } else if (match_option(option, "-XX:+ManagementServer")) {
3114 jio_fprintf(defaultStream::error_stream(),
3115 "ManagementServer is not supported in this VM.\n");
3116 return JNI_ERR;
3117 #endif // INCLUDE_MANAGEMENT
3118 // CreateMinidumpOnCrash is removed, and replaced by CreateCoredumpOnCrash
3119 } else if (match_option(option, "-XX:+CreateMinidumpOnCrash")) {
3120 if (FLAG_SET_CMDLINE(bool, CreateCoredumpOnCrash, true) != Flag::SUCCESS) {
3121 return JNI_EINVAL;
3122 }
3123 jio_fprintf(defaultStream::output_stream(),
3124 "CreateMinidumpOnCrash is replaced by CreateCoredumpOnCrash: CreateCoredumpOnCrash is on\n");
3125 } else if (match_option(option, "-XX:-CreateMinidumpOnCrash")) {
3126 if (FLAG_SET_CMDLINE(bool, CreateCoredumpOnCrash, false) != Flag::SUCCESS) {
3127 return JNI_EINVAL;
3128 }
3129 jio_fprintf(defaultStream::output_stream(),
3130 "CreateMinidumpOnCrash is replaced by CreateCoredumpOnCrash: CreateCoredumpOnCrash is off\n");
3131 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx
3132 // Skip -XX:Flags= and -XX:VMOptionsFile= since those cases have
3133 // already been handled
3134 if ((strncmp(tail, "Flags=", strlen("Flags=")) != 0) &&
3135 (strncmp(tail, "VMOptionsFile=", strlen("VMOptionsFile=")) != 0)) {
3136 if (!process_argument(tail, args->ignoreUnrecognized, origin)) {
3137 return JNI_EINVAL;
3138 }
3139 }
3140 // Unknown option
3141 } else if (is_bad_option(option, args->ignoreUnrecognized)) {
3142 return JNI_ERR;
3143 }
3144 }
3145
3146 // PrintSharedArchiveAndExit will turn on
3147 // -Xshare:on
3148 // -XX:+TraceClassPaths
3149 if (PrintSharedArchiveAndExit) {
3150 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
3151 return JNI_EINVAL;
3152 }
3153 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
3154 return JNI_EINVAL;
3155 }
3156 if (FLAG_SET_CMDLINE(bool, TraceClassPaths, true) != Flag::SUCCESS) {
3157 return JNI_EINVAL;
3158 }
3159 }
3160
3161 // Change the default value for flags which have different default values
3162 // when working with older JDKs.
3163 #ifdef LINUX
3164 if (JDK_Version::current().compare_major(6) <= 0 &&
3165 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) {
3166 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false);
3167 }
3168 #endif // LINUX
3169 fix_appclasspath();
3170 return JNI_OK;
3171 }
3172
3173 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled)
3174 //
3175 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar
3176 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar".
3177 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty
3178 // path is treated as the current directory.
3179 //
3180 // This causes problems with CDS, which requires that all directories specified in the classpath
3181 // must be empty. In most cases, applications do NOT want to load classes from the current
3182 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up
3183 // scripts compatible with CDS.
3184 void Arguments::fix_appclasspath() {
3185 if (IgnoreEmptyClassPaths) {
3186 const char separator = *os::path_separator();
3187 const char* src = _java_class_path->value();
3188
3189 // skip over all the leading empty paths
3190 while (*src == separator) {
3191 src ++;
3192 }
3193
3194 char* copy = os::strdup_check_oom(src, mtInternal);
3195
3196 // trim all trailing empty paths
3197 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) {
3198 *tail = '\0';
3199 }
3200
3201 char from[3] = {separator, separator, '\0'};
3202 char to [2] = {separator, '\0'};
3203 while (StringUtils::replace_no_expand(copy, from, to) > 0) {
3204 // Keep replacing "::" -> ":" until we have no more "::" (non-windows)
3205 // Keep replacing ";;" -> ";" until we have no more ";;" (windows)
3206 }
3207
3208 _java_class_path->set_value(copy);
3209 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore
3210 }
3211
3212 if (!PrintSharedArchiveAndExit) {
3213 ClassLoader::trace_class_path("[classpath: ", _java_class_path->value());
3214 }
3215 }
3216
3217 static bool has_jar_files(const char* directory) {
3218 DIR* dir = os::opendir(directory);
3219 if (dir == NULL) return false;
3220
3221 struct dirent *entry;
3222 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtInternal);
3223 bool hasJarFile = false;
3224 while (!hasJarFile && (entry = os::readdir(dir, (dirent *) dbuf)) != NULL) {
3225 const char* name = entry->d_name;
3226 const char* ext = name + strlen(name) - 4;
3227 hasJarFile = ext > name && (os::file_name_strcmp(ext, ".jar") == 0);
3228 }
3229 FREE_C_HEAP_ARRAY(char, dbuf);
3230 os::closedir(dir);
3231 return hasJarFile ;
3232 }
3233
3234 static int check_non_empty_dirs(const char* path) {
3235 const char separator = *os::path_separator();
3236 const char* const end = path + strlen(path);
3237 int nonEmptyDirs = 0;
3238 while (path < end) {
3239 const char* tmp_end = strchr(path, separator);
3240 if (tmp_end == NULL) {
3241 if (has_jar_files(path)) {
3242 nonEmptyDirs++;
3243 jio_fprintf(defaultStream::output_stream(),
3244 "Non-empty directory: %s\n", path);
3245 }
3246 path = end;
3247 } else {
3248 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1, mtInternal);
3249 memcpy(dirpath, path, tmp_end - path);
3250 dirpath[tmp_end - path] = '\0';
3251 if (has_jar_files(dirpath)) {
3252 nonEmptyDirs++;
3253 jio_fprintf(defaultStream::output_stream(),
3254 "Non-empty directory: %s\n", dirpath);
3255 }
3256 FREE_C_HEAP_ARRAY(char, dirpath);
3257 path = tmp_end + 1;
3258 }
3259 }
3260 return nonEmptyDirs;
3261 }
3262
3263 jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) {
3264 // check if the default lib/endorsed directory exists; if so, error
3265 char path[JVM_MAXPATHLEN];
3266 const char* fileSep = os::file_separator();
3267 sprintf(path, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep);
3268
3269 if (CheckEndorsedAndExtDirs) {
3270 int nonEmptyDirs = 0;
3271 // check endorsed directory
3272 nonEmptyDirs += check_non_empty_dirs(path);
3273 // check the extension directories
3274 nonEmptyDirs += check_non_empty_dirs(Arguments::get_ext_dirs());
3275 if (nonEmptyDirs > 0) {
3276 return JNI_ERR;
3277 }
3278 }
3279
3280 DIR* dir = os::opendir(path);
3281 if (dir != NULL) {
3282 jio_fprintf(defaultStream::output_stream(),
3283 "<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n"
3284 "in modular form will be supported via the concept of upgradeable modules.\n");
3285 os::closedir(dir);
3286 return JNI_ERR;
3287 }
3288
3289 sprintf(path, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep);
3290 dir = os::opendir(path);
3291 if (dir != NULL) {
3292 jio_fprintf(defaultStream::output_stream(),
3293 "<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; "
3294 "Use -classpath instead.\n.");
3295 os::closedir(dir);
3296 return JNI_ERR;
3297 }
3298
3299 if (scp_assembly_required) {
3300 // Assemble the bootclasspath elements into the final path.
3301 char *combined_path = scp_p->combined_path();
3302 Arguments::set_sysclasspath(combined_path);
3303 FREE_C_HEAP_ARRAY(char, combined_path);
3304 }
3305
3306 // This must be done after all arguments have been processed.
3307 // java_compiler() true means set to "NONE" or empty.
3308 if (java_compiler() && !xdebug_mode()) {
3309 // For backwards compatibility, we switch to interpreted mode if
3310 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was
3311 // not specified.
3312 set_mode_flags(_int);
3313 }
3314
3315 // CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode),
3316 // but like -Xint, leave compilation thresholds unaffected.
3317 // With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well.
3318 if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) {
3319 set_mode_flags(_int);
3320 }
3321
3322 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set
3323 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) {
3324 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold);
3325 }
3326
3327 #ifndef COMPILER2
3328 // Don't degrade server performance for footprint
3329 if (FLAG_IS_DEFAULT(UseLargePages) &&
3330 MaxHeapSize < LargePageHeapSizeThreshold) {
3331 // No need for large granularity pages w/small heaps.
3332 // Note that large pages are enabled/disabled for both the
3333 // Java heap and the code cache.
3334 FLAG_SET_DEFAULT(UseLargePages, false);
3335 }
3336
3337 #else
3338 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) {
3339 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1);
3340 }
3341 #endif
3342
3343 #ifndef TIERED
3344 // Tiered compilation is undefined.
3345 UNSUPPORTED_OPTION(TieredCompilation, "TieredCompilation");
3346 #endif
3347
3348 // If we are running in a headless jre, force java.awt.headless property
3349 // to be true unless the property has already been set.
3350 // Also allow the OS environment variable JAVA_AWT_HEADLESS to set headless state.
3351 if (os::is_headless_jre()) {
3352 const char* headless = Arguments::get_property("java.awt.headless");
3353 if (headless == NULL) {
3354 const char *headless_env = ::getenv("JAVA_AWT_HEADLESS");
3355 if (headless_env == NULL) {
3356 if (!add_property("java.awt.headless=true")) {
3357 return JNI_ENOMEM;
3358 }
3359 } else {
3360 char buffer[256];
3361 jio_snprintf(buffer, sizeof(buffer), "java.awt.headless=%s", headless_env);
3362 if (!add_property(buffer)) {
3363 return JNI_ENOMEM;
3364 }
3365 }
3366 }
3367 }
3368
3369 if (UseConcMarkSweepGC && FLAG_IS_DEFAULT(UseParNewGC) && !UseParNewGC) {
3370 // CMS can only be used with ParNew
3371 FLAG_SET_ERGO(bool, UseParNewGC, true);
3372 }
3373
3374 if (!check_vm_args_consistency()) {
3375 return JNI_ERR;
3376 }
3377
3378 return JNI_OK;
3379 }
3380
3381 // Helper class for controlling the lifetime of JavaVMInitArgs
3382 // objects. The contents of the JavaVMInitArgs are guaranteed to be
3383 // deleted on the destruction of the ScopedVMInitArgs object.
3384 class ScopedVMInitArgs : public StackObj {
3385 private:
3386 JavaVMInitArgs _args;
3387 bool _is_set;
3388
3389 public:
3390 ScopedVMInitArgs() {
3391 _args.version = JNI_VERSION_1_2;
3392 _args.nOptions = 0;
3393 _args.options = NULL;
3394 _args.ignoreUnrecognized = false;
3395 _is_set = false;
3396 }
3397
3398 // Populates the JavaVMInitArgs object represented by this
3399 // ScopedVMInitArgs object with the arguments in options. The
3400 // allocated memory is deleted by the destructor. If this method
3401 // returns anything other than JNI_OK, then this object is in a
3402 // partially constructed state, and should be abandoned.
3403 jint set_args(GrowableArray<JavaVMOption>* options) {
3404 _is_set = true;
3405 JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL(
3406 JavaVMOption, options->length(), mtInternal);
3407 if (options_arr == NULL) {
3408 return JNI_ENOMEM;
3409 }
3410 _args.options = options_arr;
3411
3412 for (int i = 0; i < options->length(); i++) {
3413 options_arr[i] = options->at(i);
3414 options_arr[i].optionString = os::strdup(options_arr[i].optionString);
3415 if (options_arr[i].optionString == NULL) {
3416 // Rely on the destructor to do cleanup.
3417 _args.nOptions = i;
3418 return JNI_ENOMEM;
3419 }
3420 }
3421
3422 _args.nOptions = options->length();
3423 _args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions;
3424 return JNI_OK;
3425 }
3426
3427 JavaVMInitArgs* get() { return &_args; }
3428 bool is_set() { return _is_set; }
3429
3430 ~ScopedVMInitArgs() {
3431 if (_args.options == NULL) return;
3432 for (int i = 0; i < _args.nOptions; i++) {
3433 os::free(_args.options[i].optionString);
3434 }
3435 FREE_C_HEAP_ARRAY(JavaVMOption, _args.options);
3436 }
3437
3438 // Insert options into this option list, to replace option at
3439 // vm_options_file_pos (-XX:VMOptionsFile)
3440 jint insert(const JavaVMInitArgs* args,
3441 const JavaVMInitArgs* args_to_insert,
3442 const int vm_options_file_pos) {
3443 assert(_args.options == NULL, "shouldn't be set yet");
3444 assert(args_to_insert->nOptions != 0, "there should be args to insert");
3445 assert(vm_options_file_pos != -1, "vm_options_file_pos should be set");
3446
3447 int length = args->nOptions + args_to_insert->nOptions - 1;
3448 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtInternal)
3449 GrowableArray<JavaVMOption>(length, true); // Construct new option array
3450 for (int i = 0; i < args->nOptions; i++) {
3451 if (i == vm_options_file_pos) {
3452 // insert the new options starting at the same place as the
3453 // -XX:VMOptionsFile option
3454 for (int j = 0; j < args_to_insert->nOptions; j++) {
3455 options->push(args_to_insert->options[j]);
3456 }
3457 } else {
3458 options->push(args->options[i]);
3459 }
3460 }
3461 // make into options array
3462 jint result = set_args(options);
3463 delete options;
3464 return result;
3465 }
3466 };
3467
3468 jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) {
3469 return parse_options_environment_variable("_JAVA_OPTIONS", args);
3470 }
3471
3472 jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) {
3473 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args);
3474 }
3475
3476 jint Arguments::parse_options_environment_variable(const char* name,
3477 ScopedVMInitArgs* vm_args) {
3478 char *buffer = ::getenv(name);
3479
3480 // Don't check this environment variable if user has special privileges
3481 // (e.g. unix su command).
3482 if (buffer == NULL || os::have_special_privileges()) {
3483 return JNI_OK;
3484 }
3485
3486 if ((buffer = os::strdup(buffer)) == NULL) {
3487 return JNI_ENOMEM;
3488 }
3489
3490 int retcode = parse_options_buffer(name, buffer, strlen(buffer), vm_args);
3491
3492 os::free(buffer);
3493 return retcode;
3494 }
3495
3496 const int OPTION_BUFFER_SIZE = 1024;
3497
3498 jint Arguments::parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args) {
3499 // read file into buffer
3500 int fd = ::open(file_name, O_RDONLY);
3501 if (fd < 0) {
3502 jio_fprintf(defaultStream::error_stream(),
3503 "Could not open options file '%s'\n",
3504 file_name);
3505 return JNI_ERR;
3506 }
3507
3508 // '+ 1' for NULL termination even with max bytes
3509 int bytes_alloc = OPTION_BUFFER_SIZE + 1;
3510
3511 char *buf = NEW_C_HEAP_ARRAY_RETURN_NULL(char, bytes_alloc, mtInternal);
3512 if (NULL == buf) {
3513 jio_fprintf(defaultStream::error_stream(),
3514 "Could not allocate read buffer for options file parse\n");
3515 os::close(fd);
3516 return JNI_ENOMEM;
3517 }
3518
3519 memset(buf, 0, (unsigned)bytes_alloc);
3520
3521 // Fill buffer
3522 // Use ::read() instead of os::read because os::read()
3523 // might do a thread state transition
3524 // and it is too early for that here
3525
3526 int bytes_read = ::read(fd, (void *)buf, (unsigned)bytes_alloc);
3527 os::close(fd);
3528 if (bytes_read < 0) {
3529 FREE_C_HEAP_ARRAY(char, buf);
3530 jio_fprintf(defaultStream::error_stream(),
3531 "Could not read options file '%s'\n", file_name);
3532 return JNI_ERR;
3533 }
3534
3535 if (bytes_read == 0) {
3536 // tell caller there is no option data and that is ok
3537 FREE_C_HEAP_ARRAY(char, buf);
3538 return JNI_OK;
3539 }
3540
3541 // file is larger than OPTION_BUFFER_SIZE
3542 if (bytes_read > bytes_alloc - 1) {
3543 FREE_C_HEAP_ARRAY(char, buf);
3544 jio_fprintf(defaultStream::error_stream(),
3545 "Options file '%s' is larger than %d bytes.\n",
3546 file_name, bytes_alloc - 1);
3547 return JNI_EINVAL;
3548 }
3549
3550 int retcode = parse_options_buffer(file_name, buf, bytes_read, vm_args);
3551
3552 FREE_C_HEAP_ARRAY(char, buf);
3553 return retcode;
3554 }
3555
3556 jint Arguments::parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args) {
3557 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JavaVMOption>(2, true); // Construct option array
3558
3559 // some pointers to help with parsing
3560 char *buffer_end = buffer + buf_len;
3561 char *opt_hd = buffer;
3562 char *wrt = buffer;
3563 char *rd = buffer;
3564
3565 // parse all options
3566 while (rd < buffer_end) {
3567 // skip leading white space from the input string
3568 while (rd < buffer_end && isspace(*rd)) {
3569 rd++;
3570 }
3571
3572 if (rd >= buffer_end) {
3573 break;
3574 }
3575
3576 // Remember this is where we found the head of the token.
3577 opt_hd = wrt;
3578
3579 // Tokens are strings of non white space characters separated
3580 // by one or more white spaces.
3581 while (rd < buffer_end && !isspace(*rd)) {
3582 if (*rd == '\'' || *rd == '"') { // handle a quoted string
3583 int quote = *rd; // matching quote to look for
3584 rd++; // don't copy open quote
3585 while (rd < buffer_end && *rd != quote) {
3586 // include everything (even spaces)
3587 // up until the close quote
3588 *wrt++ = *rd++; // copy to option string
3589 }
3590
3591 if (rd < buffer_end) {
3592 rd++; // don't copy close quote
3593 } else {
3594 // did not see closing quote
3595 jio_fprintf(defaultStream::error_stream(),
3596 "Unmatched quote in %s\n", name);
3597 delete options;
3598 return JNI_ERR;
3599 }
3600 } else {
3601 *wrt++ = *rd++; // copy to option string
3602 }
3603 }
3604
3605 // steal a white space character and set it to NULL
3606 *wrt++ = '\0';
3607 // We now have a complete token
3608
3609 JavaVMOption option;
3610 option.optionString = opt_hd;
3611
3612 options->append(option); // Fill in option
3613
3614 rd++; // Advance to next character
3615 }
3616
3617 // Fill out JavaVMInitArgs structure.
3618 jint status = vm_args->set_args(options);
3619
3620 delete options;
3621 return status;
3622 }
3623
3624 void Arguments::set_shared_spaces_flags() {
3625 if (DumpSharedSpaces) {
3626 if (RequireSharedSpaces) {
3627 warning("cannot dump shared archive while using shared archive");
3628 }
3629 UseSharedSpaces = false;
3630 #ifdef _LP64
3631 if (!UseCompressedOops || !UseCompressedClassPointers) {
3632 vm_exit_during_initialization(
3633 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL);
3634 }
3635 } else {
3636 if (!UseCompressedOops || !UseCompressedClassPointers) {
3637 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces.");
3638 }
3639 #endif
3640 }
3641 }
3642
3643 #if !INCLUDE_ALL_GCS
3644 static void force_serial_gc() {
3645 FLAG_SET_DEFAULT(UseSerialGC, true);
3646 UNSUPPORTED_GC_OPTION(UseG1GC);
3647 UNSUPPORTED_GC_OPTION(UseParallelGC);
3648 UNSUPPORTED_GC_OPTION(UseParallelOldGC);
3649 UNSUPPORTED_GC_OPTION(UseConcMarkSweepGC);
3650 UNSUPPORTED_GC_OPTION(UseParNewGC);
3651 }
3652 #endif // INCLUDE_ALL_GCS
3653
3654 // Sharing support
3655 // Construct the path to the archive
3656 static char* get_shared_archive_path() {
3657 char *shared_archive_path;
3658 if (SharedArchiveFile == NULL) {
3659 char jvm_path[JVM_MAXPATHLEN];
3660 os::jvm_path(jvm_path, sizeof(jvm_path));
3661 char *end = strrchr(jvm_path, *os::file_separator());
3662 if (end != NULL) *end = '\0';
3663 size_t jvm_path_len = strlen(jvm_path);
3664 size_t file_sep_len = strlen(os::file_separator());
3665 const size_t len = jvm_path_len + file_sep_len + 20;
3666 shared_archive_path = NEW_C_HEAP_ARRAY(char, len, mtInternal);
3667 if (shared_archive_path != NULL) {
3668 jio_snprintf(shared_archive_path, len, "%s%sclasses.jsa",
3669 jvm_path, os::file_separator());
3670 }
3671 } else {
3672 shared_archive_path = os::strdup_check_oom(SharedArchiveFile, mtInternal);
3673 }
3674 return shared_archive_path;
3675 }
3676
3677 #ifndef PRODUCT
3678 // Determine whether LogVMOutput should be implicitly turned on.
3679 static bool use_vm_log() {
3680 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) ||
3681 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods ||
3682 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers ||
3683 PrintAssembly || TraceDeoptimization || TraceDependencies ||
3684 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) {
3685 return true;
3686 }
3687
3688 #ifdef COMPILER1
3689 if (PrintC1Statistics) {
3690 return true;
3691 }
3692 #endif // COMPILER1
3693
3694 #ifdef COMPILER2
3695 if (PrintOptoAssembly || PrintOptoStatistics) {
3696 return true;
3697 }
3698 #endif // COMPILER2
3699
3700 return false;
3701 }
3702
3703 #endif // PRODUCT
3704
3705 jint Arguments::insert_vm_options_file(const JavaVMInitArgs* args,
3706 char** flags_file,
3707 char** vm_options_file,
3708 const int vm_options_file_pos,
3709 ScopedVMInitArgs *vm_options_file_args,
3710 ScopedVMInitArgs* args_out) {
3711 jint code = parse_vm_options_file(*vm_options_file, vm_options_file_args);
3712 if (code != JNI_OK) {
3713 return code;
3714 }
3715
3716 // Now set global settings from the vm_option file, giving an error if
3717 // it has VMOptionsFile in it
3718 code = match_special_option_and_act(vm_options_file_args->get(), flags_file,
3719 NULL, NULL, NULL);
3720 if (code != JNI_OK) {
3721 return code;
3722 }
3723
3724 if (vm_options_file_args->get()->nOptions < 1) {
3725 return 0;
3726 }
3727
3728 return args_out->insert(args, vm_options_file_args->get(),
3729 vm_options_file_pos);
3730 }
3731
3732 jint Arguments::match_special_option_and_act(const JavaVMInitArgs* args,
3733 char ** flags_file,
3734 char ** vm_options_file,
3735 ScopedVMInitArgs* vm_options_file_args,
3736 ScopedVMInitArgs* args_out) {
3737 // Remaining part of option string
3738 const char* tail;
3739 int vm_options_file_pos = -1;
3740
3741 for (int index = 0; index < args->nOptions; index++) {
3742 const JavaVMOption* option = args->options + index;
3743 if (ArgumentsExt::process_options(option)) {
3744 continue;
3745 }
3746 if (match_option(option, "-XX:Flags=", &tail)) {
3747 *flags_file = (char *) tail;
3748 if (*flags_file == NULL) {
3749 jio_fprintf(defaultStream::error_stream(),
3750 "Cannot copy flags_file name.\n");
3751 return JNI_ENOMEM;
3752 }
3753 continue;
3754 }
3755 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
3756 if (vm_options_file != NULL) {
3757 // The caller accepts -XX:VMOptionsFile
3758 if (*vm_options_file != NULL) {
3759 jio_fprintf(defaultStream::error_stream(),
3760 "Only one VM Options file is supported "
3761 "on the command line\n");
3762 return JNI_EINVAL;
3763 }
3764
3765 *vm_options_file = (char *) tail;
3766 vm_options_file_pos = index; // save position of -XX:VMOptionsFile
3767 if (*vm_options_file == NULL) {
3768 jio_fprintf(defaultStream::error_stream(),
3769 "Cannot copy vm_options_file name.\n");
3770 return JNI_ENOMEM;
3771 }
3772 } else {
3773 jio_fprintf(defaultStream::error_stream(),
3774 "VM options file is only supported on the command line\n");
3775 return JNI_EINVAL;
3776 }
3777 continue;
3778 }
3779 if (match_option(option, "-XX:+PrintVMOptions")) {
3780 PrintVMOptions = true;
3781 continue;
3782 }
3783 if (match_option(option, "-XX:-PrintVMOptions")) {
3784 PrintVMOptions = false;
3785 continue;
3786 }
3787 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) {
3788 IgnoreUnrecognizedVMOptions = true;
3789 continue;
3790 }
3791 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) {
3792 IgnoreUnrecognizedVMOptions = false;
3793 continue;
3794 }
3795 if (match_option(option, "-XX:+PrintFlagsInitial")) {
3796 CommandLineFlags::printFlags(tty, false);
3797 vm_exit(0);
3798 }
3799 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) {
3800 #if INCLUDE_NMT
3801 // The launcher did not setup nmt environment variable properly.
3802 if (!MemTracker::check_launcher_nmt_support(tail)) {
3803 warning("Native Memory Tracking did not setup properly, using wrong launcher?");
3804 }
3805
3806 // Verify if nmt option is valid.
3807 if (MemTracker::verify_nmt_option()) {
3808 // Late initialization, still in single-threaded mode.
3809 if (MemTracker::tracking_level() >= NMT_summary) {
3810 MemTracker::init();
3811 }
3812 } else {
3813 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL);
3814 }
3815 continue;
3816 #else
3817 jio_fprintf(defaultStream::error_stream(),
3818 "Native Memory Tracking is not supported in this VM\n");
3819 return JNI_ERR;
3820 #endif
3821 }
3822
3823 #ifndef PRODUCT
3824 if (match_option(option, "-XX:+PrintFlagsWithComments")) {
3825 CommandLineFlags::printFlags(tty, true);
3826 vm_exit(0);
3827 }
3828 #endif
3829 }
3830
3831 // If there's a VMOptionsFile, parse that (also can set flags_file)
3832 if ((vm_options_file != NULL) && (*vm_options_file != NULL)) {
3833 return insert_vm_options_file(args, flags_file, vm_options_file,
3834 vm_options_file_pos, vm_options_file_args, args_out);
3835 }
3836 return JNI_OK;
3837 }
3838
3839 static void print_options(const JavaVMInitArgs *args) {
3840 const char* tail;
3841 for (int index = 0; index < args->nOptions; index++) {
3842 const JavaVMOption *option = args->options + index;
3843 if (match_option(option, "-XX:", &tail)) {
3844 logOption(tail);
3845 }
3846 }
3847 }
3848
3849 // Parse entry point called from JNI_CreateJavaVM
3850
3851 jint Arguments::parse(const JavaVMInitArgs* args) {
3852
3853 // Initialize ranges and constraints
3854 CommandLineFlagRangeList::init();
3855 CommandLineFlagConstraintList::init();
3856
3857 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed.
3858 const char* hotspotrc = ".hotspotrc";
3859 char* flags_file = NULL;
3860 char* vm_options_file = NULL;
3861 bool settings_file_specified = false;
3862 bool needs_hotspotrc_warning = false;
3863 ScopedVMInitArgs java_tool_options_args;
3864 ScopedVMInitArgs java_options_args;
3865 ScopedVMInitArgs modified_cmd_line_args;
3866 // Pass in vm_options_file_args to keep memory for flags_file from being
3867 // deallocated if found in the vm options file.
3868 ScopedVMInitArgs vm_options_file_args;
3869
3870 jint code =
3871 parse_java_tool_options_environment_variable(&java_tool_options_args);
3872 if (code != JNI_OK) {
3873 return code;
3874 }
3875
3876 code = parse_java_options_environment_variable(&java_options_args);
3877 if (code != JNI_OK) {
3878 return code;
3879 }
3880
3881 code = match_special_option_and_act(java_tool_options_args.get(),
3882 &flags_file, NULL, NULL, NULL);
3883 if (code != JNI_OK) {
3884 return code;
3885 }
3886
3887 code = match_special_option_and_act(args, &flags_file, &vm_options_file,
3888 &vm_options_file_args,
3889 &modified_cmd_line_args);
3890 if (code != JNI_OK) {
3891 return code;
3892 }
3893
3894
3895 // The command line arguments have been modified to include VMOptionsFile arguments.
3896 if (modified_cmd_line_args.is_set()) {
3897 args = modified_cmd_line_args.get();
3898 }
3899
3900 code = match_special_option_and_act(java_options_args.get(), &flags_file,
3901 NULL, NULL, NULL);
3902 if (code != JNI_OK) {
3903 return code;
3904 }
3905
3906 settings_file_specified = (flags_file != NULL);
3907
3908 if (IgnoreUnrecognizedVMOptions) {
3909 // uncast const to modify the flag args->ignoreUnrecognized
3910 *(jboolean*)(&args->ignoreUnrecognized) = true;
3911 java_tool_options_args.get()->ignoreUnrecognized = true;
3912 java_options_args.get()->ignoreUnrecognized = true;
3913 }
3914
3915 // Parse specified settings file
3916 if (settings_file_specified) {
3917 if (!process_settings_file(flags_file, true, args->ignoreUnrecognized)) {
3918 return JNI_EINVAL;
3919 }
3920 } else {
3921 #ifdef ASSERT
3922 // Parse default .hotspotrc settings file
3923 if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) {
3924 return JNI_EINVAL;
3925 }
3926 #else
3927 struct stat buf;
3928 if (os::stat(hotspotrc, &buf) == 0) {
3929 needs_hotspotrc_warning = true;
3930 }
3931 #endif
3932 }
3933
3934 if (PrintVMOptions) {
3935 print_options(java_tool_options_args.get());
3936 print_options(args);
3937 print_options(java_options_args.get());
3938 }
3939
3940 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS
3941 jint result = parse_vm_init_args(java_tool_options_args.get(),
3942 java_options_args.get(),
3943 args); // command line arguments
3944
3945 if (result != JNI_OK) {
3946 return result;
3947 }
3948
3949 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed.
3950 SharedArchivePath = get_shared_archive_path();
3951 if (SharedArchivePath == NULL) {
3952 return JNI_ENOMEM;
3953 }
3954
3955 // Set up VerifySharedSpaces
3956 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) {
3957 VerifySharedSpaces = true;
3958 }
3959
3960 // Delay warning until here so that we've had a chance to process
3961 // the -XX:-PrintWarnings flag
3962 if (needs_hotspotrc_warning) {
3963 warning("%s file is present but has been ignored. "
3964 "Run with -XX:Flags=%s to load the file.",
3965 hotspotrc, hotspotrc);
3966 }
3967
3968 #if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
3969 UNSUPPORTED_OPTION(UseLargePages, "-XX:+UseLargePages");
3970 #endif
3971
3972 ArgumentsExt::report_unsupported_options();
3973
3974 #ifndef PRODUCT
3975 if (TraceBytecodesAt != 0) {
3976 TraceBytecodes = true;
3977 }
3978 if (CountCompiledCalls) {
3979 if (UseCounterDecay) {
3980 warning("UseCounterDecay disabled because CountCalls is set");
3981 UseCounterDecay = false;
3982 }
3983 }
3984 #endif // PRODUCT
3985
3986 if (ScavengeRootsInCode == 0) {
3987 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) {
3988 warning("forcing ScavengeRootsInCode non-zero");
3989 }
3990 ScavengeRootsInCode = 1;
3991 }
3992
3993 if (PrintGCDetails) {
3994 // Turn on -verbose:gc options as well
3995 PrintGC = true;
3996 }
3997
3998 // Set object alignment values.
3999 set_object_alignment();
4000
4001 #if !INCLUDE_ALL_GCS
4002 force_serial_gc();
4003 #endif // INCLUDE_ALL_GCS
4004 #if !INCLUDE_CDS
4005 if (DumpSharedSpaces || RequireSharedSpaces) {
4006 jio_fprintf(defaultStream::error_stream(),
4007 "Shared spaces are not supported in this VM\n");
4008 return JNI_ERR;
4009 }
4010 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) || PrintSharedSpaces) {
4011 warning("Shared spaces are not supported in this VM");
4012 FLAG_SET_DEFAULT(UseSharedSpaces, false);
4013 FLAG_SET_DEFAULT(PrintSharedSpaces, false);
4014 }
4015 no_shared_spaces("CDS Disabled");
4016 #endif // INCLUDE_CDS
4017
4018 return JNI_OK;
4019 }
4020
4021 jint Arguments::apply_ergo() {
4022
4023 // Set flags based on ergonomics.
4024 set_ergonomics_flags();
4025
4026 set_shared_spaces_flags();
4027
4028 // Check the GC selections again.
4029 if (!check_gc_consistency()) {
4030 return JNI_EINVAL;
4031 }
4032
4033 if (TieredCompilation) {
4034 set_tiered_flags();
4035 } else {
4036 int max_compilation_policy_choice = 1;
4037 #ifdef COMPILER2
4038 max_compilation_policy_choice = 2;
4039 #endif
4040 // Check if the policy is valid.
4041 if (CompilationPolicyChoice >= max_compilation_policy_choice) {
4042 vm_exit_during_initialization(
4043 "Incompatible compilation policy selected", NULL);
4044 }
4045 // Scale CompileThreshold
4046 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves CompileThreshold unchanged.
4047 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
4048 FLAG_SET_ERGO(intx, CompileThreshold, scaled_compile_threshold(CompileThreshold));
4049 }
4050 }
4051
4052 #ifdef COMPILER2
4053 #ifndef PRODUCT
4054 if (PrintIdealGraphLevel > 0) {
4055 FLAG_SET_ERGO(bool, PrintIdealGraph, true);
4056 }
4057 #endif
4058 #endif
4059
4060 // Set heap size based on available physical memory
4061 set_heap_size();
4062
4063 ArgumentsExt::set_gc_specific_flags();
4064
4065 // Initialize Metaspace flags and alignments
4066 Metaspace::ergo_initialize();
4067
4068 // Set bytecode rewriting flags
4069 set_bytecode_flags();
4070
4071 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled
4072 jint code = set_aggressive_opts_flags();
4073 if (code != JNI_OK) {
4074 return code;
4075 }
4076
4077 // Turn off biased locking for locking debug mode flags,
4078 // which are subtly different from each other but neither works with
4079 // biased locking
4080 if (UseHeavyMonitors
4081 #ifdef COMPILER1
4082 || !UseFastLocking
4083 #endif // COMPILER1
4084 ) {
4085 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) {
4086 // flag set to true on command line; warn the user that they
4087 // can't enable biased locking here
4088 warning("Biased Locking is not supported with locking debug flags"
4089 "; ignoring UseBiasedLocking flag." );
4090 }
4091 UseBiasedLocking = false;
4092 }
4093
4094 #ifdef ZERO
4095 // Clear flags not supported on zero.
4096 FLAG_SET_DEFAULT(ProfileInterpreter, false);
4097 FLAG_SET_DEFAULT(UseBiasedLocking, false);
4098 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false));
4099 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false));
4100 #endif // CC_INTERP
4101
4102 #ifdef COMPILER2
4103 if (!EliminateLocks) {
4104 EliminateNestedLocks = false;
4105 }
4106 if (!Inline) {
4107 IncrementalInline = false;
4108 }
4109 #ifndef PRODUCT
4110 if (!IncrementalInline) {
4111 AlwaysIncrementalInline = false;
4112 }
4113 #endif
4114 if (!UseTypeSpeculation && FLAG_IS_DEFAULT(TypeProfileLevel)) {
4115 // nothing to use the profiling, turn if off
4116 FLAG_SET_DEFAULT(TypeProfileLevel, 0);
4117 }
4118 #endif
4119
4120 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) {
4121 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output");
4122 DebugNonSafepoints = true;
4123 }
4124
4125 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) {
4126 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used");
4127 }
4128
4129 #ifndef PRODUCT
4130 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) {
4131 if (use_vm_log()) {
4132 LogVMOutput = true;
4133 }
4134 }
4135 #endif // PRODUCT
4136
4137 if (PrintCommandLineFlags) {
4138 CommandLineFlags::printSetFlags(tty);
4139 }
4140
4141 // Apply CPU specific policy for the BiasedLocking
4142 if (UseBiasedLocking) {
4143 if (!VM_Version::use_biased_locking() &&
4144 !(FLAG_IS_CMDLINE(UseBiasedLocking))) {
4145 UseBiasedLocking = false;
4146 }
4147 }
4148 #ifdef COMPILER2
4149 if (!UseBiasedLocking || EmitSync != 0) {
4150 UseOptoBiasInlining = false;
4151 }
4152 #endif
4153
4154 return JNI_OK;
4155 }
4156
4157 jint Arguments::adjust_after_os() {
4158 if (UseNUMA) {
4159 if (UseParallelGC || UseParallelOldGC) {
4160 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) {
4161 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M);
4162 }
4163 }
4164 // UseNUMAInterleaving is set to ON for all collectors and
4165 // platforms when UseNUMA is set to ON. NUMA-aware collectors
4166 // such as the parallel collector for Linux and Solaris will
4167 // interleave old gen and survivor spaces on top of NUMA
4168 // allocation policy for the eden space.
4169 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on
4170 // all platforms and ParallelGC on Windows will interleave all
4171 // of the heap spaces across NUMA nodes.
4172 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) {
4173 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true);
4174 }
4175 }
4176 return JNI_OK;
4177 }
4178
4179 int Arguments::PropertyList_count(SystemProperty* pl) {
4180 int count = 0;
4181 while(pl != NULL) {
4182 count++;
4183 pl = pl->next();
4184 }
4185 return count;
4186 }
4187
4188 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) {
4189 assert(key != NULL, "just checking");
4190 SystemProperty* prop;
4191 for (prop = pl; prop != NULL; prop = prop->next()) {
4192 if (strcmp(key, prop->key()) == 0) return prop->value();
4193 }
4194 return NULL;
4195 }
4196
4197 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) {
4198 int count = 0;
4199 const char* ret_val = NULL;
4200
4201 while(pl != NULL) {
4202 if(count >= index) {
4203 ret_val = pl->key();
4204 break;
4205 }
4206 count++;
4207 pl = pl->next();
4208 }
4209
4210 return ret_val;
4211 }
4212
4213 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) {
4214 int count = 0;
4215 char* ret_val = NULL;
4216
4217 while(pl != NULL) {
4218 if(count >= index) {
4219 ret_val = pl->value();
4220 break;
4221 }
4222 count++;
4223 pl = pl->next();
4224 }
4225
4226 return ret_val;
4227 }
4228
4229 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) {
4230 SystemProperty* p = *plist;
4231 if (p == NULL) {
4232 *plist = new_p;
4233 } else {
4234 while (p->next() != NULL) {
4235 p = p->next();
4236 }
4237 p->set_next(new_p);
4238 }
4239 }
4240
4241 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v) {
4242 if (plist == NULL)
4243 return;
4244
4245 SystemProperty* new_p = new SystemProperty(k, v, true);
4246 PropertyList_add(plist, new_p);
4247 }
4248
4249 void Arguments::PropertyList_add(SystemProperty *element) {
4250 PropertyList_add(&_system_properties, element);
4251 }
4252
4253 // This add maintains unique property key in the list.
4254 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v, jboolean append) {
4255 if (plist == NULL)
4256 return;
4257
4258 // If property key exist then update with new value.
4259 SystemProperty* prop;
4260 for (prop = *plist; prop != NULL; prop = prop->next()) {
4261 if (strcmp(k, prop->key()) == 0) {
4262 if (append) {
4263 prop->append_value(v);
4264 } else {
4265 prop->set_value(v);
4266 }
4267 return;
4268 }
4269 }
4270
4271 PropertyList_add(plist, k, v);
4272 }
4273
4274 // Copies src into buf, replacing "%%" with "%" and "%p" with pid
4275 // Returns true if all of the source pointed by src has been copied over to
4276 // the destination buffer pointed by buf. Otherwise, returns false.
4277 // Notes:
4278 // 1. If the length (buflen) of the destination buffer excluding the
4279 // NULL terminator character is not long enough for holding the expanded
4280 // pid characters, it also returns false instead of returning the partially
4281 // expanded one.
4282 // 2. The passed in "buflen" should be large enough to hold the null terminator.
4283 bool Arguments::copy_expand_pid(const char* src, size_t srclen,
4284 char* buf, size_t buflen) {
4285 const char* p = src;
4286 char* b = buf;
4287 const char* src_end = &src[srclen];
4288 char* buf_end = &buf[buflen - 1];
4289
4290 while (p < src_end && b < buf_end) {
4291 if (*p == '%') {
4292 switch (*(++p)) {
4293 case '%': // "%%" ==> "%"
4294 *b++ = *p++;
4295 break;
4296 case 'p': { // "%p" ==> current process id
4297 // buf_end points to the character before the last character so
4298 // that we could write '\0' to the end of the buffer.
4299 size_t buf_sz = buf_end - b + 1;
4300 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id());
4301
4302 // if jio_snprintf fails or the buffer is not long enough to hold
4303 // the expanded pid, returns false.
4304 if (ret < 0 || ret >= (int)buf_sz) {
4305 return false;
4306 } else {
4307 b += ret;
4308 assert(*b == '\0', "fail in copy_expand_pid");
4309 if (p == src_end && b == buf_end + 1) {
4310 // reach the end of the buffer.
4311 return true;
4312 }
4313 }
4314 p++;
4315 break;
4316 }
4317 default :
4318 *b++ = '%';
4319 }
4320 } else {
4321 *b++ = *p++;
4322 }
4323 }
4324 *b = '\0';
4325 return (p == src_end); // return false if not all of the source was copied
4326 }