1 /*
2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classLoader.hpp"
27 #include "classfile/javaAssertions.hpp"
28 #include "classfile/stringTable.hpp"
29 #include "classfile/symbolTable.hpp"
30 #include "code/codeCacheExtensions.hpp"
31 #include "gc/shared/cardTableRS.hpp"
32 #include "gc/shared/genCollectedHeap.hpp"
33 #include "gc/shared/referenceProcessor.hpp"
34 #include "gc/shared/taskqueue.hpp"
35 #include "memory/allocation.inline.hpp"
36 #include "memory/universe.inline.hpp"
37 #include "oops/oop.inline.hpp"
38 #include "prims/jvmtiExport.hpp"
39 #include "runtime/arguments.hpp"
40 #include "runtime/arguments_ext.hpp"
41 #include "runtime/commandLineFlagConstraintList.hpp"
42 #include "runtime/commandLineFlagRangeList.hpp"
43 #include "runtime/globals.hpp"
44 #include "runtime/globals_extension.hpp"
45 #include "runtime/java.hpp"
46 #include "runtime/os.hpp"
47 #include "runtime/vm_version.hpp"
48 #include "services/management.hpp"
49 #include "services/memTracker.hpp"
50 #include "utilities/defaultStream.hpp"
51 #include "utilities/macros.hpp"
52 #include "utilities/stringUtils.hpp"
53 #if INCLUDE_ALL_GCS
54 #include "gc/shenandoah/shenandoahHeap.hpp"
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 if (UseShenandoahGC && FLAG_IS_DEFAULT(UseCompressedOops)) {
1476 warning("Compressed Oops not supported with ShenandoahGC");
1477 FLAG_SET_ERGO(bool, UseCompressedOops, false);
1478 FLAG_SET_ERGO(bool, UseCompressedClassPointers, false);
1479 }
1480
1481 if (max_heap_size <= max_heap_for_compressed_oops()) {
1482 #if !defined(COMPILER1) || defined(TIERED)
1483 if (FLAG_IS_DEFAULT(UseCompressedOops)) {
1484 FLAG_SET_ERGO(bool, UseCompressedOops, true);
1485 }
1486 #endif
1487 } else {
1488 if (UseCompressedOops && !FLAG_IS_DEFAULT(UseCompressedOops)) {
1489 warning("Max heap size too large for Compressed Oops");
1490 FLAG_SET_DEFAULT(UseCompressedOops, false);
1491 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1492 }
1493 }
1494 #endif // _LP64
1495 #endif // ZERO
1496 }
1497
1498
1499 // NOTE: set_use_compressed_klass_ptrs() must be called after calling
1500 // set_use_compressed_oops().
1501 void Arguments::set_use_compressed_klass_ptrs() {
1502 #ifndef ZERO
1503 #ifdef _LP64
1504 // UseCompressedOops must be on for UseCompressedClassPointers to be on.
1505 if (!UseCompressedOops) {
1506 if (UseCompressedClassPointers) {
1507 warning("UseCompressedClassPointers requires UseCompressedOops");
1508 }
1509 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1510 } else {
1511 // Turn on UseCompressedClassPointers too
1512 if (FLAG_IS_DEFAULT(UseCompressedClassPointers)) {
1513 FLAG_SET_ERGO(bool, UseCompressedClassPointers, true);
1514 }
1515 // Check the CompressedClassSpaceSize to make sure we use compressed klass ptrs.
1516 if (UseCompressedClassPointers) {
1517 if (CompressedClassSpaceSize > KlassEncodingMetaspaceMax) {
1518 warning("CompressedClassSpaceSize is too large for UseCompressedClassPointers");
1519 FLAG_SET_DEFAULT(UseCompressedClassPointers, false);
1520 }
1521 }
1522 }
1523 #endif // _LP64
1524 #endif // !ZERO
1525 }
1526
1527 void Arguments::set_conservative_max_heap_alignment() {
1528 // The conservative maximum required alignment for the heap is the maximum of
1529 // the alignments imposed by several sources: any requirements from the heap
1530 // itself, the collector policy and the maximum page size we may run the VM
1531 // with.
1532 size_t heap_alignment = GenCollectedHeap::conservative_max_heap_alignment();
1533 #if INCLUDE_ALL_GCS
1534 if (UseParallelGC) {
1535 heap_alignment = ParallelScavengeHeap::conservative_max_heap_alignment();
1536 } else if (UseG1GC) {
1537 heap_alignment = G1CollectedHeap::conservative_max_heap_alignment();
1538 } else if (UseShenandoahGC) {
1539 // TODO: This sucks. Can't we have a clean interface to call the GC's collector
1540 // policy for this?
1541 heap_alignment = ShenandoahHeap::conservative_max_heap_alignment();
1542 }
1543 #endif // INCLUDE_ALL_GCS
1544 _conservative_max_heap_alignment = MAX4(heap_alignment,
1545 (size_t)os::vm_allocation_granularity(),
1546 os::max_page_size(),
1547 CollectorPolicy::compute_heap_alignment());
1548 }
1549
1550 void Arguments::select_gc_ergonomically() {
1551 if (os::is_server_class_machine()) {
1552 if (should_auto_select_low_pause_collector()) {
1553 FLAG_SET_ERGO(bool, UseConcMarkSweepGC, true);
1554 } else {
1555 #if defined(JAVASE_EMBEDDED)
1556 FLAG_SET_ERGO(bool, UseParallelGC, true);
1557 #else
1558 FLAG_SET_ERGO(bool, UseG1GC, true);
1559 #endif
1560 }
1561 } else {
1562 FLAG_SET_ERGO(bool, UseSerialGC, true);
1563 }
1564 }
1565
1566 void Arguments::select_gc() {
1567 if (!gc_selected()) {
1568 select_gc_ergonomically();
1569 guarantee(gc_selected(), "No GC selected");
1570 }
1571 }
1572
1573 void Arguments::set_ergonomics_flags() {
1574 select_gc();
1575
1576 #ifdef COMPILER2
1577 // Shared spaces work fine with other GCs but causes bytecode rewriting
1578 // to be disabled, which hurts interpreter performance and decreases
1579 // server performance. When -server is specified, keep the default off
1580 // unless it is asked for. Future work: either add bytecode rewriting
1581 // at link time, or rewrite bytecodes in non-shared methods.
1582 if (!DumpSharedSpaces && !RequireSharedSpaces &&
1583 (FLAG_IS_DEFAULT(UseSharedSpaces) || !UseSharedSpaces)) {
1584 no_shared_spaces("COMPILER2 default: -Xshare:auto | off, have to manually setup to on.");
1585 }
1586 #endif
1587
1588 set_conservative_max_heap_alignment();
1589
1590 #ifndef ZERO
1591 #ifdef _LP64
1592 set_use_compressed_oops();
1593
1594 // set_use_compressed_klass_ptrs() must be called after calling
1595 // set_use_compressed_oops().
1596 set_use_compressed_klass_ptrs();
1597
1598 // Also checks that certain machines are slower with compressed oops
1599 // in vm_version initialization code.
1600 #endif // _LP64
1601 #endif // !ZERO
1602
1603 CodeCacheExtensions::set_ergonomics_flags();
1604 }
1605
1606 void Arguments::set_parallel_gc_flags() {
1607 assert(UseParallelGC || UseParallelOldGC, "Error");
1608 // Enable ParallelOld unless it was explicitly disabled (cmd line or rc file).
1609 if (FLAG_IS_DEFAULT(UseParallelOldGC)) {
1610 FLAG_SET_DEFAULT(UseParallelOldGC, true);
1611 }
1612 FLAG_SET_DEFAULT(UseParallelGC, true);
1613
1614 // If no heap maximum was requested explicitly, use some reasonable fraction
1615 // of the physical memory, up to a maximum of 1GB.
1616 FLAG_SET_DEFAULT(ParallelGCThreads,
1617 Abstract_VM_Version::parallel_worker_threads());
1618 if (ParallelGCThreads == 0) {
1619 jio_fprintf(defaultStream::error_stream(),
1620 "The Parallel GC can not be combined with -XX:ParallelGCThreads=0\n");
1621 vm_exit(1);
1622 }
1623
1624 if (UseAdaptiveSizePolicy) {
1625 // We don't want to limit adaptive heap sizing's freedom to adjust the heap
1626 // unless the user actually sets these flags.
1627 if (FLAG_IS_DEFAULT(MinHeapFreeRatio)) {
1628 FLAG_SET_DEFAULT(MinHeapFreeRatio, 0);
1629 }
1630 if (FLAG_IS_DEFAULT(MaxHeapFreeRatio)) {
1631 FLAG_SET_DEFAULT(MaxHeapFreeRatio, 100);
1632 }
1633 }
1634
1635 // If InitialSurvivorRatio or MinSurvivorRatio were not specified, but the
1636 // SurvivorRatio has been set, reset their default values to SurvivorRatio +
1637 // 2. By doing this we make SurvivorRatio also work for Parallel Scavenger.
1638 // See CR 6362902 for details.
1639 if (!FLAG_IS_DEFAULT(SurvivorRatio)) {
1640 if (FLAG_IS_DEFAULT(InitialSurvivorRatio)) {
1641 FLAG_SET_DEFAULT(InitialSurvivorRatio, SurvivorRatio + 2);
1642 }
1643 if (FLAG_IS_DEFAULT(MinSurvivorRatio)) {
1644 FLAG_SET_DEFAULT(MinSurvivorRatio, SurvivorRatio + 2);
1645 }
1646 }
1647
1648 if (UseParallelOldGC) {
1649 // Par compact uses lower default values since they are treated as
1650 // minimums. These are different defaults because of the different
1651 // interpretation and are not ergonomically set.
1652 if (FLAG_IS_DEFAULT(MarkSweepDeadRatio)) {
1653 FLAG_SET_DEFAULT(MarkSweepDeadRatio, 1);
1654 }
1655 }
1656 }
1657
1658 void Arguments::set_g1_gc_flags() {
1659 assert(UseG1GC, "Error");
1660 #ifdef COMPILER1
1661 FastTLABRefill = false;
1662 #endif
1663 FLAG_SET_DEFAULT(ParallelGCThreads, Abstract_VM_Version::parallel_worker_threads());
1664 if (ParallelGCThreads == 0) {
1665 assert(!FLAG_IS_DEFAULT(ParallelGCThreads), "The default value for ParallelGCThreads should not be 0.");
1666 vm_exit_during_initialization("The flag -XX:+UseG1GC can not be combined with -XX:ParallelGCThreads=0", NULL);
1667 }
1668
1669 #if INCLUDE_ALL_GCS
1670 if (G1ConcRefinementThreads == 0) {
1671 FLAG_SET_DEFAULT(G1ConcRefinementThreads, ParallelGCThreads);
1672 }
1673 #endif
1674
1675 // MarkStackSize will be set (if it hasn't been set by the user)
1676 // when concurrent marking is initialized.
1677 // Its value will be based upon the number of parallel marking threads.
1678 // But we do set the maximum mark stack size here.
1679 if (FLAG_IS_DEFAULT(MarkStackSizeMax)) {
1680 FLAG_SET_DEFAULT(MarkStackSizeMax, 128 * TASKQUEUE_SIZE);
1681 }
1682
1683 if (FLAG_IS_DEFAULT(GCTimeRatio) || GCTimeRatio == 0) {
1684 // In G1, we want the default GC overhead goal to be higher than
1685 // say in PS. So we set it here to 10%. Otherwise the heap might
1686 // be expanded more aggressively than we would like it to. In
1687 // fact, even 10% seems to not be high enough in some cases
1688 // (especially small GC stress tests that the main thing they do
1689 // is allocation). We might consider increase it further.
1690 FLAG_SET_DEFAULT(GCTimeRatio, 9);
1691 }
1692
1693 if (PrintGCDetails && Verbose) {
1694 tty->print_cr("MarkStackSize: %uk MarkStackSizeMax: %uk",
1695 (unsigned int) (MarkStackSize / K), (uint) (MarkStackSizeMax / K));
1696 tty->print_cr("ConcGCThreads: %u", ConcGCThreads);
1697 }
1698 }
1699
1700 void Arguments::set_shenandoah_gc_flags() {
1701 FLAG_SET_DEFAULT(UseDynamicNumberOfGCThreads, true);
1702 FLAG_SET_DEFAULT(ParallelGCThreads,
1703 Abstract_VM_Version::parallel_worker_threads());
1704
1705 if (FLAG_IS_DEFAULT(ConcGCThreads)) {
1706 uint conc_threads = MAX2((uint) 1, ParallelGCThreads);
1707 FLAG_SET_DEFAULT(ConcGCThreads, conc_threads);
1708 }
1709
1710 if (FLAG_IS_DEFAULT(ParallelRefProcEnabled)) {
1711 FLAG_SET_DEFAULT(ParallelRefProcEnabled, true);
1712 }
1713 }
1714
1715 #if !INCLUDE_ALL_GCS
1716 #ifdef ASSERT
1717 static bool verify_serial_gc_flags() {
1718 return (UseSerialGC &&
1719 !(UseParNewGC || (UseConcMarkSweepGC) || UseG1GC ||
1720 UseParallelGC || UseParallelOldGC));
1721 }
1722 #endif // ASSERT
1723 #endif // INCLUDE_ALL_GCS
1724
1725 void Arguments::set_gc_specific_flags() {
1726 #if INCLUDE_ALL_GCS
1727 // Set per-collector flags
1728 if (UseParallelGC || UseParallelOldGC) {
1729 set_parallel_gc_flags();
1730 } else if (UseConcMarkSweepGC) {
1731 set_cms_and_parnew_gc_flags();
1732 } else if (UseG1GC) {
1733 set_g1_gc_flags();
1734 } else if (UseShenandoahGC) {
1735 set_shenandoah_gc_flags();
1736 }
1737 check_deprecated_gc_flags();
1738 if (AssumeMP && !UseSerialGC) {
1739 if (FLAG_IS_DEFAULT(ParallelGCThreads) && ParallelGCThreads == 1) {
1740 warning("If the number of processors is expected to increase from one, then"
1741 " you should configure the number of parallel GC threads appropriately"
1742 " using -XX:ParallelGCThreads=N");
1743 }
1744 }
1745 if (MinHeapFreeRatio == 100) {
1746 // Keeping the heap 100% free is hard ;-) so limit it to 99%.
1747 FLAG_SET_ERGO(uintx, MinHeapFreeRatio, 99);
1748 }
1749 #else // INCLUDE_ALL_GCS
1750 assert(verify_serial_gc_flags(), "SerialGC unset");
1751 #endif // INCLUDE_ALL_GCS
1752 }
1753
1754 julong Arguments::limit_by_allocatable_memory(julong limit) {
1755 julong max_allocatable;
1756 julong result = limit;
1757 if (os::has_allocatable_memory_limit(&max_allocatable)) {
1758 result = MIN2(result, max_allocatable / MaxVirtMemFraction);
1759 }
1760 return result;
1761 }
1762
1763 // Use static initialization to get the default before parsing
1764 static const size_t DefaultHeapBaseMinAddress = HeapBaseMinAddress;
1765
1766 void Arguments::set_heap_size() {
1767 if (!FLAG_IS_DEFAULT(DefaultMaxRAMFraction)) {
1768 // Deprecated flag
1769 FLAG_SET_CMDLINE(uintx, MaxRAMFraction, DefaultMaxRAMFraction);
1770 }
1771
1772 const julong phys_mem =
1773 FLAG_IS_DEFAULT(MaxRAM) ? MIN2(os::physical_memory(), (julong)MaxRAM)
1774 : (julong)MaxRAM;
1775
1776 // If the maximum heap size has not been set with -Xmx,
1777 // then set it as fraction of the size of physical memory,
1778 // respecting the maximum and minimum sizes of the heap.
1779 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
1780 julong reasonable_max = phys_mem / MaxRAMFraction;
1781
1782 if (phys_mem <= MaxHeapSize * MinRAMFraction) {
1783 // Small physical memory, so use a minimum fraction of it for the heap
1784 reasonable_max = phys_mem / MinRAMFraction;
1785 } else {
1786 // Not-small physical memory, so require a heap at least
1787 // as large as MaxHeapSize
1788 reasonable_max = MAX2(reasonable_max, (julong)MaxHeapSize);
1789 }
1790 if (!FLAG_IS_DEFAULT(ErgoHeapSizeLimit) && ErgoHeapSizeLimit != 0) {
1791 // Limit the heap size to ErgoHeapSizeLimit
1792 reasonable_max = MIN2(reasonable_max, (julong)ErgoHeapSizeLimit);
1793 }
1794 if (UseCompressedOops) {
1795 // Limit the heap size to the maximum possible when using compressed oops
1796 julong max_coop_heap = (julong)max_heap_for_compressed_oops();
1797
1798 // HeapBaseMinAddress can be greater than default but not less than.
1799 if (!FLAG_IS_DEFAULT(HeapBaseMinAddress)) {
1800 if (HeapBaseMinAddress < DefaultHeapBaseMinAddress) {
1801 // matches compressed oops printing flags
1802 if (PrintCompressedOopsMode || (PrintMiscellaneous && Verbose)) {
1803 jio_fprintf(defaultStream::error_stream(),
1804 "HeapBaseMinAddress must be at least " SIZE_FORMAT
1805 " (" SIZE_FORMAT "G) which is greater than value given "
1806 SIZE_FORMAT "\n",
1807 DefaultHeapBaseMinAddress,
1808 DefaultHeapBaseMinAddress/G,
1809 HeapBaseMinAddress);
1810 }
1811 FLAG_SET_ERGO(size_t, HeapBaseMinAddress, DefaultHeapBaseMinAddress);
1812 }
1813 }
1814
1815 if (HeapBaseMinAddress + MaxHeapSize < max_coop_heap) {
1816 // Heap should be above HeapBaseMinAddress to get zero based compressed oops
1817 // but it should be not less than default MaxHeapSize.
1818 max_coop_heap -= HeapBaseMinAddress;
1819 }
1820 reasonable_max = MIN2(reasonable_max, max_coop_heap);
1821 }
1822 reasonable_max = limit_by_allocatable_memory(reasonable_max);
1823
1824 if (!FLAG_IS_DEFAULT(InitialHeapSize)) {
1825 // An initial heap size was specified on the command line,
1826 // so be sure that the maximum size is consistent. Done
1827 // after call to limit_by_allocatable_memory because that
1828 // method might reduce the allocation size.
1829 reasonable_max = MAX2(reasonable_max, (julong)InitialHeapSize);
1830 }
1831
1832 if (PrintGCDetails && Verbose) {
1833 // Cannot use gclog_or_tty yet.
1834 tty->print_cr(" Maximum heap size " SIZE_FORMAT, (size_t) reasonable_max);
1835 }
1836 FLAG_SET_ERGO(size_t, MaxHeapSize, (size_t)reasonable_max);
1837 }
1838
1839 // If the minimum or initial heap_size have not been set or requested to be set
1840 // ergonomically, set them accordingly.
1841 if (InitialHeapSize == 0 || min_heap_size() == 0) {
1842 julong reasonable_minimum = (julong)(OldSize + NewSize);
1843
1844 reasonable_minimum = MIN2(reasonable_minimum, (julong)MaxHeapSize);
1845
1846 reasonable_minimum = limit_by_allocatable_memory(reasonable_minimum);
1847
1848 if (InitialHeapSize == 0) {
1849 julong reasonable_initial = phys_mem / InitialRAMFraction;
1850
1851 reasonable_initial = MAX3(reasonable_initial, reasonable_minimum, (julong)min_heap_size());
1852 reasonable_initial = MIN2(reasonable_initial, (julong)MaxHeapSize);
1853
1854 reasonable_initial = limit_by_allocatable_memory(reasonable_initial);
1855
1856 if (PrintGCDetails && Verbose) {
1857 // Cannot use gclog_or_tty yet.
1858 tty->print_cr(" Initial heap size " SIZE_FORMAT, (size_t)reasonable_initial);
1859 }
1860 FLAG_SET_ERGO(size_t, InitialHeapSize, (size_t)reasonable_initial);
1861 }
1862 // If the minimum heap size has not been set (via -Xms),
1863 // synchronize with InitialHeapSize to avoid errors with the default value.
1864 if (min_heap_size() == 0) {
1865 set_min_heap_size(MIN2((size_t)reasonable_minimum, InitialHeapSize));
1866 if (PrintGCDetails && Verbose) {
1867 // Cannot use gclog_or_tty yet.
1868 tty->print_cr(" Minimum heap size " SIZE_FORMAT, min_heap_size());
1869 }
1870 }
1871 }
1872 }
1873
1874 // This must be called after ergonomics.
1875 void Arguments::set_bytecode_flags() {
1876 if (!RewriteBytecodes) {
1877 FLAG_SET_DEFAULT(RewriteFrequentPairs, false);
1878 }
1879 }
1880
1881 // Aggressive optimization flags -XX:+AggressiveOpts
1882 jint Arguments::set_aggressive_opts_flags() {
1883 #ifdef COMPILER2
1884 if (AggressiveUnboxing) {
1885 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
1886 FLAG_SET_DEFAULT(EliminateAutoBox, true);
1887 } else if (!EliminateAutoBox) {
1888 // warning("AggressiveUnboxing is disabled because EliminateAutoBox is disabled");
1889 AggressiveUnboxing = false;
1890 }
1891 if (FLAG_IS_DEFAULT(DoEscapeAnalysis)) {
1892 FLAG_SET_DEFAULT(DoEscapeAnalysis, true);
1893 } else if (!DoEscapeAnalysis) {
1894 // warning("AggressiveUnboxing is disabled because DoEscapeAnalysis is disabled");
1895 AggressiveUnboxing = false;
1896 }
1897 }
1898 if (AggressiveOpts || !FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
1899 if (FLAG_IS_DEFAULT(EliminateAutoBox)) {
1900 FLAG_SET_DEFAULT(EliminateAutoBox, true);
1901 }
1902 if (FLAG_IS_DEFAULT(AutoBoxCacheMax)) {
1903 FLAG_SET_DEFAULT(AutoBoxCacheMax, 20000);
1904 }
1905
1906 // Feed the cache size setting into the JDK
1907 char buffer[1024];
1908 sprintf(buffer, "java.lang.Integer.IntegerCache.high=" INTX_FORMAT, AutoBoxCacheMax);
1909 if (!add_property(buffer)) {
1910 return JNI_ENOMEM;
1911 }
1912 }
1913 if (AggressiveOpts && FLAG_IS_DEFAULT(BiasedLockingStartupDelay)) {
1914 FLAG_SET_DEFAULT(BiasedLockingStartupDelay, 500);
1915 }
1916 #endif
1917
1918 if (AggressiveOpts) {
1919 // Sample flag setting code
1920 // if (FLAG_IS_DEFAULT(EliminateZeroing)) {
1921 // FLAG_SET_DEFAULT(EliminateZeroing, true);
1922 // }
1923 }
1924
1925 return JNI_OK;
1926 }
1927
1928 //===========================================================================================================
1929 // Parsing of java.compiler property
1930
1931 void Arguments::process_java_compiler_argument(const char* arg) {
1932 // For backwards compatibility, Djava.compiler=NONE or ""
1933 // causes us to switch to -Xint mode UNLESS -Xdebug
1934 // is also specified.
1935 if (strlen(arg) == 0 || strcasecmp(arg, "NONE") == 0) {
1936 set_java_compiler(true); // "-Djava.compiler[=...]" most recently seen.
1937 }
1938 }
1939
1940 void Arguments::process_java_launcher_argument(const char* launcher, void* extra_info) {
1941 _sun_java_launcher = os::strdup_check_oom(launcher);
1942 }
1943
1944 bool Arguments::created_by_java_launcher() {
1945 assert(_sun_java_launcher != NULL, "property must have value");
1946 return strcmp(DEFAULT_JAVA_LAUNCHER, _sun_java_launcher) != 0;
1947 }
1948
1949 bool Arguments::sun_java_launcher_is_altjvm() {
1950 return _sun_java_launcher_is_altjvm;
1951 }
1952
1953 //===========================================================================================================
1954 // Parsing of main arguments
1955
1956 // check if do gclog rotation
1957 // +UseGCLogFileRotation is a must,
1958 // no gc log rotation when log file not supplied or
1959 // NumberOfGCLogFiles is 0
1960 void check_gclog_consistency() {
1961 if (UseGCLogFileRotation) {
1962 if ((Arguments::gc_log_filename() == NULL) || (NumberOfGCLogFiles == 0)) {
1963 jio_fprintf(defaultStream::output_stream(),
1964 "To enable GC log rotation, use -Xloggc:<filename> -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=<num_of_files>\n"
1965 "where num_of_file > 0\n"
1966 "GC log rotation is turned off\n");
1967 UseGCLogFileRotation = false;
1968 }
1969 }
1970
1971 if (UseGCLogFileRotation && (GCLogFileSize != 0) && (GCLogFileSize < 8*K)) {
1972 if (FLAG_SET_CMDLINE(size_t, GCLogFileSize, 8*K) == Flag::SUCCESS) {
1973 jio_fprintf(defaultStream::output_stream(),
1974 "GCLogFileSize changed to minimum 8K\n");
1975 }
1976 }
1977 }
1978
1979 // This function is called for -Xloggc:<filename>, it can be used
1980 // to check if a given file name(or string) conforms to the following
1981 // specification:
1982 // A valid string only contains "[A-Z][a-z][0-9].-_%[p|t]"
1983 // %p and %t only allowed once. We only limit usage of filename not path
1984 bool is_filename_valid(const char *file_name) {
1985 const char* p = file_name;
1986 char file_sep = os::file_separator()[0];
1987 const char* cp;
1988 // skip prefix path
1989 for (cp = file_name; *cp != '\0'; cp++) {
1990 if (*cp == '/' || *cp == file_sep) {
1991 p = cp + 1;
1992 }
1993 }
1994
1995 int count_p = 0;
1996 int count_t = 0;
1997 while (*p != '\0') {
1998 if ((*p >= '0' && *p <= '9') ||
1999 (*p >= 'A' && *p <= 'Z') ||
2000 (*p >= 'a' && *p <= 'z') ||
2001 *p == '-' ||
2002 *p == '_' ||
2003 *p == '.') {
2004 p++;
2005 continue;
2006 }
2007 if (*p == '%') {
2008 if(*(p + 1) == 'p') {
2009 p += 2;
2010 count_p ++;
2011 continue;
2012 }
2013 if (*(p + 1) == 't') {
2014 p += 2;
2015 count_t ++;
2016 continue;
2017 }
2018 }
2019 return false;
2020 }
2021 return count_p < 2 && count_t < 2;
2022 }
2023
2024 // Check consistency of GC selection
2025 bool Arguments::check_gc_consistency() {
2026 check_gclog_consistency();
2027 // Ensure that the user has not selected conflicting sets
2028 // of collectors.
2029 uint i = 0;
2030 if (UseSerialGC) i++;
2031 if (UseConcMarkSweepGC) i++;
2032 if (UseParallelGC || UseParallelOldGC) i++;
2033 if (UseG1GC) i++;
2034 if (i > 1) {
2035 jio_fprintf(defaultStream::error_stream(),
2036 "Conflicting collector combinations in option list; "
2037 "please refer to the release notes for the combinations "
2038 "allowed\n");
2039 return false;
2040 }
2041
2042 if (UseConcMarkSweepGC && !UseParNewGC) {
2043 jio_fprintf(defaultStream::error_stream(),
2044 "It is not possible to combine the DefNew young collector with the CMS collector.\n");
2045 return false;
2046 }
2047
2048 if (UseParNewGC && !UseConcMarkSweepGC) {
2049 jio_fprintf(defaultStream::error_stream(),
2050 "It is not possible to combine the ParNew young collector with any collector other than CMS.\n");
2051 return false;
2052 }
2053
2054 return true;
2055 }
2056
2057 void Arguments::check_deprecated_gc_flags() {
2058 if (FLAG_IS_CMDLINE(UseParNewGC)) {
2059 warning("The UseParNewGC flag is deprecated and will likely be removed in a future release");
2060 }
2061 if (FLAG_IS_CMDLINE(MaxGCMinorPauseMillis)) {
2062 warning("Using MaxGCMinorPauseMillis as minor pause goal is deprecated"
2063 "and will likely be removed in future release");
2064 }
2065 if (FLAG_IS_CMDLINE(DefaultMaxRAMFraction)) {
2066 warning("DefaultMaxRAMFraction is deprecated and will likely be removed in a future release. "
2067 "Use MaxRAMFraction instead.");
2068 }
2069 }
2070
2071 // Check the consistency of vm_init_args
2072 bool Arguments::check_vm_args_consistency() {
2073 // Method for adding checks for flag consistency.
2074 // The intent is to warn the user of all possible conflicts,
2075 // before returning an error.
2076 // Note: Needs platform-dependent factoring.
2077 bool status = true;
2078
2079 if (TLABRefillWasteFraction == 0) {
2080 jio_fprintf(defaultStream::error_stream(),
2081 "TLABRefillWasteFraction should be a denominator, "
2082 "not " SIZE_FORMAT "\n",
2083 TLABRefillWasteFraction);
2084 status = false;
2085 }
2086
2087 if (FullGCALot && FLAG_IS_DEFAULT(MarkSweepAlwaysCompactCount)) {
2088 MarkSweepAlwaysCompactCount = 1; // Move objects every gc.
2089 }
2090
2091 if (UseParallelOldGC && ParallelOldGCSplitALot) {
2092 // Settings to encourage splitting.
2093 if (!FLAG_IS_CMDLINE(NewRatio)) {
2094 if (FLAG_SET_CMDLINE(uintx, NewRatio, 2) != Flag::SUCCESS) {
2095 status = false;
2096 }
2097 }
2098 if (!FLAG_IS_CMDLINE(ScavengeBeforeFullGC)) {
2099 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
2100 status = false;
2101 }
2102 }
2103 }
2104
2105 if (!(UseParallelGC || UseParallelOldGC) && FLAG_IS_DEFAULT(ScavengeBeforeFullGC)) {
2106 FLAG_SET_DEFAULT(ScavengeBeforeFullGC, false);
2107 }
2108
2109 if (GCTimeLimit == 100) {
2110 // Turn off gc-overhead-limit-exceeded checks
2111 FLAG_SET_DEFAULT(UseGCOverheadLimit, false);
2112 }
2113
2114 status = status && check_gc_consistency();
2115
2116 // CMS space iteration, which FLSVerifyAllHeapreferences entails,
2117 // insists that we hold the requisite locks so that the iteration is
2118 // MT-safe. For the verification at start-up and shut-down, we don't
2119 // yet have a good way of acquiring and releasing these locks,
2120 // which are not visible at the CollectedHeap level. We want to
2121 // be able to acquire these locks and then do the iteration rather
2122 // than just disable the lock verification. This will be fixed under
2123 // bug 4788986.
2124 if (UseConcMarkSweepGC && FLSVerifyAllHeapReferences) {
2125 if (VerifyDuringStartup) {
2126 warning("Heap verification at start-up disabled "
2127 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
2128 VerifyDuringStartup = false; // Disable verification at start-up
2129 }
2130
2131 if (VerifyBeforeExit) {
2132 warning("Heap verification at shutdown disabled "
2133 "(due to current incompatibility with FLSVerifyAllHeapReferences)");
2134 VerifyBeforeExit = false; // Disable verification at shutdown
2135 }
2136 }
2137
2138 // Note: only executed in non-PRODUCT mode
2139 if (!UseAsyncConcMarkSweepGC &&
2140 (ExplicitGCInvokesConcurrent ||
2141 ExplicitGCInvokesConcurrentAndUnloadsClasses)) {
2142 jio_fprintf(defaultStream::error_stream(),
2143 "error: +ExplicitGCInvokesConcurrent[AndUnloadsClasses] conflicts"
2144 " with -UseAsyncConcMarkSweepGC");
2145 status = false;
2146 }
2147
2148 if (PrintNMTStatistics) {
2149 #if INCLUDE_NMT
2150 if (MemTracker::tracking_level() == NMT_off) {
2151 #endif // INCLUDE_NMT
2152 warning("PrintNMTStatistics is disabled, because native memory tracking is not enabled");
2153 PrintNMTStatistics = false;
2154 #if INCLUDE_NMT
2155 }
2156 #endif
2157 }
2158
2159 // Check lower bounds of the code cache
2160 // Template Interpreter code is approximately 3X larger in debug builds.
2161 uint min_code_cache_size = CodeCacheMinimumUseSpace DEBUG_ONLY(* 3);
2162 if (InitialCodeCacheSize < (uintx)os::vm_page_size()) {
2163 jio_fprintf(defaultStream::error_stream(),
2164 "Invalid InitialCodeCacheSize=%dK. Must be at least %dK.\n", InitialCodeCacheSize/K,
2165 os::vm_page_size()/K);
2166 status = false;
2167 } else if (ReservedCodeCacheSize < InitialCodeCacheSize) {
2168 jio_fprintf(defaultStream::error_stream(),
2169 "Invalid ReservedCodeCacheSize: %dK. Must be at least InitialCodeCacheSize=%dK.\n",
2170 ReservedCodeCacheSize/K, InitialCodeCacheSize/K);
2171 status = false;
2172 } else if (ReservedCodeCacheSize < min_code_cache_size) {
2173 jio_fprintf(defaultStream::error_stream(),
2174 "Invalid ReservedCodeCacheSize=%dK. Must be at least %uK.\n", ReservedCodeCacheSize/K,
2175 min_code_cache_size/K);
2176 status = false;
2177 } else if (ReservedCodeCacheSize > CODE_CACHE_SIZE_LIMIT) {
2178 // Code cache size larger than CODE_CACHE_SIZE_LIMIT is not supported.
2179 jio_fprintf(defaultStream::error_stream(),
2180 "Invalid ReservedCodeCacheSize=%dM. Must be at most %uM.\n", ReservedCodeCacheSize/M,
2181 CODE_CACHE_SIZE_LIMIT/M);
2182 status = false;
2183 } else if (NonNMethodCodeHeapSize < min_code_cache_size){
2184 jio_fprintf(defaultStream::error_stream(),
2185 "Invalid NonNMethodCodeHeapSize=%dK. Must be at least %uK.\n", NonNMethodCodeHeapSize/K,
2186 min_code_cache_size/K);
2187 status = false;
2188 } else if ((!FLAG_IS_DEFAULT(NonNMethodCodeHeapSize) || !FLAG_IS_DEFAULT(ProfiledCodeHeapSize) || !FLAG_IS_DEFAULT(NonProfiledCodeHeapSize))
2189 && (NonNMethodCodeHeapSize + NonProfiledCodeHeapSize + ProfiledCodeHeapSize) != ReservedCodeCacheSize) {
2190 jio_fprintf(defaultStream::error_stream(),
2191 "Invalid code heap sizes: NonNMethodCodeHeapSize(%dK) + ProfiledCodeHeapSize(%dK) + NonProfiledCodeHeapSize(%dK) = %dK. Must be equal to ReservedCodeCacheSize = %uK.\n",
2192 NonNMethodCodeHeapSize/K, ProfiledCodeHeapSize/K, NonProfiledCodeHeapSize/K,
2193 (NonNMethodCodeHeapSize + ProfiledCodeHeapSize + NonProfiledCodeHeapSize)/K, ReservedCodeCacheSize/K);
2194 status = false;
2195 }
2196
2197 if (!FLAG_IS_DEFAULT(CICompilerCount) && !FLAG_IS_DEFAULT(CICompilerCountPerCPU) && CICompilerCountPerCPU) {
2198 warning("The VM option CICompilerCountPerCPU overrides CICompilerCount.");
2199 }
2200
2201 return status;
2202 }
2203
2204 bool Arguments::is_bad_option(const JavaVMOption* option, jboolean ignore,
2205 const char* option_type) {
2206 if (ignore) return false;
2207
2208 const char* spacer = " ";
2209 if (option_type == NULL) {
2210 option_type = ++spacer; // Set both to the empty string.
2211 }
2212
2213 if (os::obsolete_option(option)) {
2214 jio_fprintf(defaultStream::error_stream(),
2215 "Obsolete %s%soption: %s\n", option_type, spacer,
2216 option->optionString);
2217 return false;
2218 } else {
2219 jio_fprintf(defaultStream::error_stream(),
2220 "Unrecognized %s%soption: %s\n", option_type, spacer,
2221 option->optionString);
2222 return true;
2223 }
2224 }
2225
2226 static const char* user_assertion_options[] = {
2227 "-da", "-ea", "-disableassertions", "-enableassertions", 0
2228 };
2229
2230 static const char* system_assertion_options[] = {
2231 "-dsa", "-esa", "-disablesystemassertions", "-enablesystemassertions", 0
2232 };
2233
2234 bool Arguments::parse_uintx(const char* value,
2235 uintx* uintx_arg,
2236 uintx min_size) {
2237
2238 // Check the sign first since atomull() parses only unsigned values.
2239 bool value_is_positive = !(*value == '-');
2240
2241 if (value_is_positive) {
2242 julong n;
2243 bool good_return = atomull(value, &n);
2244 if (good_return) {
2245 bool above_minimum = n >= min_size;
2246 bool value_is_too_large = n > max_uintx;
2247
2248 if (above_minimum && !value_is_too_large) {
2249 *uintx_arg = n;
2250 return true;
2251 }
2252 }
2253 }
2254 return false;
2255 }
2256
2257 Arguments::ArgsRange Arguments::parse_memory_size(const char* s,
2258 julong* long_arg,
2259 julong min_size) {
2260 if (!atomull(s, long_arg)) return arg_unreadable;
2261 return check_memory_size(*long_arg, min_size);
2262 }
2263
2264 // Parse JavaVMInitArgs structure
2265
2266 jint Arguments::parse_vm_init_args(const JavaVMInitArgs *java_tool_options_args,
2267 const JavaVMInitArgs *java_options_args,
2268 const JavaVMInitArgs *cmd_line_args) {
2269 // For components of the system classpath.
2270 SysClassPath scp(Arguments::get_sysclasspath());
2271 bool scp_assembly_required = false;
2272
2273 // Save default settings for some mode flags
2274 Arguments::_AlwaysCompileLoopMethods = AlwaysCompileLoopMethods;
2275 Arguments::_UseOnStackReplacement = UseOnStackReplacement;
2276 Arguments::_ClipInlining = ClipInlining;
2277 Arguments::_BackgroundCompilation = BackgroundCompilation;
2278 if (TieredCompilation) {
2279 Arguments::_Tier3InvokeNotifyFreqLog = Tier3InvokeNotifyFreqLog;
2280 Arguments::_Tier4InvocationThreshold = Tier4InvocationThreshold;
2281 }
2282
2283 // Setup flags for mixed which is the default
2284 set_mode_flags(_mixed);
2285
2286 // Parse args structure generated from JAVA_TOOL_OPTIONS environment
2287 // variable (if present).
2288 jint result = parse_each_vm_init_arg(
2289 java_tool_options_args, &scp, &scp_assembly_required, Flag::ENVIRON_VAR);
2290 if (result != JNI_OK) {
2291 return result;
2292 }
2293
2294 // Parse args structure generated from the command line flags.
2295 result = parse_each_vm_init_arg(cmd_line_args, &scp, &scp_assembly_required,
2296 Flag::COMMAND_LINE);
2297 if (result != JNI_OK) {
2298 return result;
2299 }
2300
2301 // Parse args structure generated from the _JAVA_OPTIONS environment
2302 // variable (if present) (mimics classic VM)
2303 result = parse_each_vm_init_arg(
2304 java_options_args, &scp, &scp_assembly_required, Flag::ENVIRON_VAR);
2305 if (result != JNI_OK) {
2306 return result;
2307 }
2308
2309 // Do final processing now that all arguments have been parsed
2310 result = finalize_vm_init_args(&scp, scp_assembly_required);
2311 if (result != JNI_OK) {
2312 return result;
2313 }
2314
2315 return JNI_OK;
2316 }
2317
2318 // Checks if name in command-line argument -agent{lib,path}:name[=options]
2319 // represents a valid JDWP agent. is_path==true denotes that we
2320 // are dealing with -agentpath (case where name is a path), otherwise with
2321 // -agentlib
2322 bool valid_jdwp_agent(char *name, bool is_path) {
2323 char *_name;
2324 const char *_jdwp = "jdwp";
2325 size_t _len_jdwp, _len_prefix;
2326
2327 if (is_path) {
2328 if ((_name = strrchr(name, (int) *os::file_separator())) == NULL) {
2329 return false;
2330 }
2331
2332 _name++; // skip past last path separator
2333 _len_prefix = strlen(JNI_LIB_PREFIX);
2334
2335 if (strncmp(_name, JNI_LIB_PREFIX, _len_prefix) != 0) {
2336 return false;
2337 }
2338
2339 _name += _len_prefix;
2340 _len_jdwp = strlen(_jdwp);
2341
2342 if (strncmp(_name, _jdwp, _len_jdwp) == 0) {
2343 _name += _len_jdwp;
2344 }
2345 else {
2346 return false;
2347 }
2348
2349 if (strcmp(_name, JNI_LIB_SUFFIX) != 0) {
2350 return false;
2351 }
2352
2353 return true;
2354 }
2355
2356 if (strcmp(name, _jdwp) == 0) {
2357 return true;
2358 }
2359
2360 return false;
2361 }
2362
2363 jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args,
2364 SysClassPath* scp_p,
2365 bool* scp_assembly_required_p,
2366 Flag::Flags origin) {
2367 // Remaining part of option string
2368 const char* tail;
2369
2370 // iterate over arguments
2371 for (int index = 0; index < args->nOptions; index++) {
2372 bool is_absolute_path = false; // for -agentpath vs -agentlib
2373
2374 const JavaVMOption* option = args->options + index;
2375
2376 if (!match_option(option, "-Djava.class.path", &tail) &&
2377 !match_option(option, "-Dsun.java.command", &tail) &&
2378 !match_option(option, "-Dsun.java.launcher", &tail)) {
2379
2380 // add all jvm options to the jvm_args string. This string
2381 // is used later to set the java.vm.args PerfData string constant.
2382 // the -Djava.class.path and the -Dsun.java.command options are
2383 // omitted from jvm_args string as each have their own PerfData
2384 // string constant object.
2385 build_jvm_args(option->optionString);
2386 }
2387
2388 // -verbose:[class/gc/jni]
2389 if (match_option(option, "-verbose", &tail)) {
2390 if (!strcmp(tail, ":class") || !strcmp(tail, "")) {
2391 if (FLAG_SET_CMDLINE(bool, TraceClassLoading, true) != Flag::SUCCESS) {
2392 return JNI_EINVAL;
2393 }
2394 if (FLAG_SET_CMDLINE(bool, TraceClassUnloading, true) != Flag::SUCCESS) {
2395 return JNI_EINVAL;
2396 }
2397 } else if (!strcmp(tail, ":gc")) {
2398 if (FLAG_SET_CMDLINE(bool, PrintGC, true) != Flag::SUCCESS) {
2399 return JNI_EINVAL;
2400 }
2401 } else if (!strcmp(tail, ":jni")) {
2402 if (FLAG_SET_CMDLINE(bool, PrintJNIResolving, true) != Flag::SUCCESS) {
2403 return JNI_EINVAL;
2404 }
2405 }
2406 // -da / -ea / -disableassertions / -enableassertions
2407 // These accept an optional class/package name separated by a colon, e.g.,
2408 // -da:java.lang.Thread.
2409 } else if (match_option(option, user_assertion_options, &tail, true)) {
2410 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2411 if (*tail == '\0') {
2412 JavaAssertions::setUserClassDefault(enable);
2413 } else {
2414 assert(*tail == ':', "bogus match by match_option()");
2415 JavaAssertions::addOption(tail + 1, enable);
2416 }
2417 // -dsa / -esa / -disablesystemassertions / -enablesystemassertions
2418 } else if (match_option(option, system_assertion_options, &tail, false)) {
2419 bool enable = option->optionString[1] == 'e'; // char after '-' is 'e'
2420 JavaAssertions::setSystemClassDefault(enable);
2421 // -bootclasspath:
2422 } else if (match_option(option, "-Xbootclasspath:", &tail)) {
2423 scp_p->reset_path(tail);
2424 *scp_assembly_required_p = true;
2425 // -bootclasspath/a:
2426 } else if (match_option(option, "-Xbootclasspath/a:", &tail)) {
2427 scp_p->add_suffix(tail);
2428 *scp_assembly_required_p = true;
2429 // -bootclasspath/p:
2430 } else if (match_option(option, "-Xbootclasspath/p:", &tail)) {
2431 scp_p->add_prefix(tail);
2432 *scp_assembly_required_p = true;
2433 // -Xrun
2434 } else if (match_option(option, "-Xrun", &tail)) {
2435 if (tail != NULL) {
2436 const char* pos = strchr(tail, ':');
2437 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2438 char* name = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len);
2439 name[len] = '\0';
2440
2441 char *options = NULL;
2442 if(pos != NULL) {
2443 size_t len2 = strlen(pos+1) + 1; // options start after ':'. Final zero must be copied.
2444 options = (char*)memcpy(NEW_C_HEAP_ARRAY(char, len2, mtInternal), pos+1, len2);
2445 }
2446 #if !INCLUDE_JVMTI
2447 if (strcmp(name, "jdwp") == 0) {
2448 jio_fprintf(defaultStream::error_stream(),
2449 "Debugging agents are not supported in this VM\n");
2450 return JNI_ERR;
2451 }
2452 #endif // !INCLUDE_JVMTI
2453 add_init_library(name, options);
2454 }
2455 // -agentlib and -agentpath
2456 } else if (match_option(option, "-agentlib:", &tail) ||
2457 (is_absolute_path = match_option(option, "-agentpath:", &tail))) {
2458 if(tail != NULL) {
2459 const char* pos = strchr(tail, '=');
2460 size_t len = (pos == NULL) ? strlen(tail) : pos - tail;
2461 char* name = strncpy(NEW_C_HEAP_ARRAY(char, len + 1, mtInternal), tail, len);
2462 name[len] = '\0';
2463
2464 char *options = NULL;
2465 if(pos != NULL) {
2466 options = os::strdup_check_oom(pos + 1, mtInternal);
2467 }
2468 #if !INCLUDE_JVMTI
2469 if (valid_jdwp_agent(name, is_absolute_path)) {
2470 jio_fprintf(defaultStream::error_stream(),
2471 "Debugging agents are not supported in this VM\n");
2472 return JNI_ERR;
2473 }
2474 #endif // !INCLUDE_JVMTI
2475 add_init_agent(name, options, is_absolute_path);
2476 }
2477 // -javaagent
2478 } else if (match_option(option, "-javaagent:", &tail)) {
2479 #if !INCLUDE_JVMTI
2480 jio_fprintf(defaultStream::error_stream(),
2481 "Instrumentation agents are not supported in this VM\n");
2482 return JNI_ERR;
2483 #else
2484 if(tail != NULL) {
2485 char *options = strcpy(NEW_C_HEAP_ARRAY(char, strlen(tail) + 1, mtInternal), tail);
2486 add_init_agent("instrument", options, false);
2487 }
2488 #endif // !INCLUDE_JVMTI
2489 // -Xnoclassgc
2490 } else if (match_option(option, "-Xnoclassgc")) {
2491 if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != Flag::SUCCESS) {
2492 return JNI_EINVAL;
2493 }
2494 // -Xconcgc
2495 } else if (match_option(option, "-Xconcgc")) {
2496 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, true) != Flag::SUCCESS) {
2497 return JNI_EINVAL;
2498 }
2499 // -Xnoconcgc
2500 } else if (match_option(option, "-Xnoconcgc")) {
2501 if (FLAG_SET_CMDLINE(bool, UseConcMarkSweepGC, false) != Flag::SUCCESS) {
2502 return JNI_EINVAL;
2503 }
2504 // -Xbatch
2505 } else if (match_option(option, "-Xbatch")) {
2506 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
2507 return JNI_EINVAL;
2508 }
2509 // -Xmn for compatibility with other JVM vendors
2510 } else if (match_option(option, "-Xmn", &tail)) {
2511 julong long_initial_young_size = 0;
2512 ArgsRange errcode = parse_memory_size(tail, &long_initial_young_size, 1);
2513 if (errcode != arg_in_range) {
2514 jio_fprintf(defaultStream::error_stream(),
2515 "Invalid initial young generation size: %s\n", option->optionString);
2516 describe_range_error(errcode);
2517 return JNI_EINVAL;
2518 }
2519 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
2520 return JNI_EINVAL;
2521 }
2522 if (FLAG_SET_CMDLINE(size_t, NewSize, (size_t)long_initial_young_size) != Flag::SUCCESS) {
2523 return JNI_EINVAL;
2524 }
2525 // -Xms
2526 } else if (match_option(option, "-Xms", &tail)) {
2527 julong long_initial_heap_size = 0;
2528 // an initial heap size of 0 means automatically determine
2529 ArgsRange errcode = parse_memory_size(tail, &long_initial_heap_size, 0);
2530 if (errcode != arg_in_range) {
2531 jio_fprintf(defaultStream::error_stream(),
2532 "Invalid initial heap size: %s\n", option->optionString);
2533 describe_range_error(errcode);
2534 return JNI_EINVAL;
2535 }
2536 set_min_heap_size((size_t)long_initial_heap_size);
2537 // Currently the minimum size and the initial heap sizes are the same.
2538 // Can be overridden with -XX:InitialHeapSize.
2539 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, (size_t)long_initial_heap_size) != Flag::SUCCESS) {
2540 return JNI_EINVAL;
2541 }
2542 // -Xmx
2543 } else if (match_option(option, "-Xmx", &tail) || match_option(option, "-XX:MaxHeapSize=", &tail)) {
2544 julong long_max_heap_size = 0;
2545 ArgsRange errcode = parse_memory_size(tail, &long_max_heap_size, 1);
2546 if (errcode != arg_in_range) {
2547 jio_fprintf(defaultStream::error_stream(),
2548 "Invalid maximum heap size: %s\n", option->optionString);
2549 describe_range_error(errcode);
2550 return JNI_EINVAL;
2551 }
2552 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, (size_t)long_max_heap_size) != Flag::SUCCESS) {
2553 return JNI_EINVAL;
2554 }
2555 // Xmaxf
2556 } else if (match_option(option, "-Xmaxf", &tail)) {
2557 char* err;
2558 int maxf = (int)(strtod(tail, &err) * 100);
2559 if (*err != '\0' || *tail == '\0') {
2560 jio_fprintf(defaultStream::error_stream(),
2561 "Bad max heap free percentage size: %s\n",
2562 option->optionString);
2563 return JNI_EINVAL;
2564 } else {
2565 if (FLAG_SET_CMDLINE(uintx, MaxHeapFreeRatio, maxf) != Flag::SUCCESS) {
2566 return JNI_EINVAL;
2567 }
2568 }
2569 // Xminf
2570 } else if (match_option(option, "-Xminf", &tail)) {
2571 char* err;
2572 int minf = (int)(strtod(tail, &err) * 100);
2573 if (*err != '\0' || *tail == '\0') {
2574 jio_fprintf(defaultStream::error_stream(),
2575 "Bad min heap free percentage size: %s\n",
2576 option->optionString);
2577 return JNI_EINVAL;
2578 } else {
2579 if (FLAG_SET_CMDLINE(uintx, MinHeapFreeRatio, minf) != Flag::SUCCESS) {
2580 return JNI_EINVAL;
2581 }
2582 }
2583 // -Xss
2584 } else if (match_option(option, "-Xss", &tail)) {
2585 julong long_ThreadStackSize = 0;
2586 ArgsRange errcode = parse_memory_size(tail, &long_ThreadStackSize, 1000);
2587 if (errcode != arg_in_range) {
2588 jio_fprintf(defaultStream::error_stream(),
2589 "Invalid thread stack size: %s\n", option->optionString);
2590 describe_range_error(errcode);
2591 return JNI_EINVAL;
2592 }
2593 // Internally track ThreadStackSize in units of 1024 bytes.
2594 if (FLAG_SET_CMDLINE(intx, ThreadStackSize,
2595 round_to((int)long_ThreadStackSize, K) / K) != Flag::SUCCESS) {
2596 return JNI_EINVAL;
2597 }
2598 // -Xoss, -Xsqnopause, -Xoptimize, -Xboundthreads
2599 } else if (match_option(option, "-Xoss", &tail) ||
2600 match_option(option, "-Xsqnopause") ||
2601 match_option(option, "-Xoptimize") ||
2602 match_option(option, "-Xboundthreads")) {
2603 // All these options are deprecated in JDK 9 and will be removed in a future release
2604 char version[256];
2605 JDK_Version::jdk(9).to_string(version, sizeof(version));
2606 warning("ignoring option %s; support was removed in %s", option->optionString, version);
2607 } else if (match_option(option, "-XX:CodeCacheExpansionSize=", &tail)) {
2608 julong long_CodeCacheExpansionSize = 0;
2609 ArgsRange errcode = parse_memory_size(tail, &long_CodeCacheExpansionSize, os::vm_page_size());
2610 if (errcode != arg_in_range) {
2611 jio_fprintf(defaultStream::error_stream(),
2612 "Invalid argument: %s. Must be at least %luK.\n", option->optionString,
2613 os::vm_page_size()/K);
2614 return JNI_EINVAL;
2615 }
2616 if (FLAG_SET_CMDLINE(uintx, CodeCacheExpansionSize, (uintx)long_CodeCacheExpansionSize) != Flag::SUCCESS) {
2617 return JNI_EINVAL;
2618 }
2619 } else if (match_option(option, "-Xmaxjitcodesize", &tail) ||
2620 match_option(option, "-XX:ReservedCodeCacheSize=", &tail)) {
2621 julong long_ReservedCodeCacheSize = 0;
2622
2623 ArgsRange errcode = parse_memory_size(tail, &long_ReservedCodeCacheSize, 1);
2624 if (errcode != arg_in_range) {
2625 jio_fprintf(defaultStream::error_stream(),
2626 "Invalid maximum code cache size: %s.\n", option->optionString);
2627 return JNI_EINVAL;
2628 }
2629 if (FLAG_SET_CMDLINE(uintx, ReservedCodeCacheSize, (uintx)long_ReservedCodeCacheSize) != Flag::SUCCESS) {
2630 return JNI_EINVAL;
2631 }
2632 // -XX:NonNMethodCodeHeapSize=
2633 } else if (match_option(option, "-XX:NonNMethodCodeHeapSize=", &tail)) {
2634 julong long_NonNMethodCodeHeapSize = 0;
2635
2636 ArgsRange errcode = parse_memory_size(tail, &long_NonNMethodCodeHeapSize, 1);
2637 if (errcode != arg_in_range) {
2638 jio_fprintf(defaultStream::error_stream(),
2639 "Invalid maximum non-nmethod code heap size: %s.\n", option->optionString);
2640 return JNI_EINVAL;
2641 }
2642 if (FLAG_SET_CMDLINE(uintx, NonNMethodCodeHeapSize, (uintx)long_NonNMethodCodeHeapSize) != Flag::SUCCESS) {
2643 return JNI_EINVAL;
2644 }
2645 // -XX:ProfiledCodeHeapSize=
2646 } else if (match_option(option, "-XX:ProfiledCodeHeapSize=", &tail)) {
2647 julong long_ProfiledCodeHeapSize = 0;
2648
2649 ArgsRange errcode = parse_memory_size(tail, &long_ProfiledCodeHeapSize, 1);
2650 if (errcode != arg_in_range) {
2651 jio_fprintf(defaultStream::error_stream(),
2652 "Invalid maximum profiled code heap size: %s.\n", option->optionString);
2653 return JNI_EINVAL;
2654 }
2655 if (FLAG_SET_CMDLINE(uintx, ProfiledCodeHeapSize, (uintx)long_ProfiledCodeHeapSize) != Flag::SUCCESS) {
2656 return JNI_EINVAL;
2657 }
2658 // -XX:NonProfiledCodeHeapSizee=
2659 } else if (match_option(option, "-XX:NonProfiledCodeHeapSize=", &tail)) {
2660 julong long_NonProfiledCodeHeapSize = 0;
2661
2662 ArgsRange errcode = parse_memory_size(tail, &long_NonProfiledCodeHeapSize, 1);
2663 if (errcode != arg_in_range) {
2664 jio_fprintf(defaultStream::error_stream(),
2665 "Invalid maximum non-profiled code heap size: %s.\n", option->optionString);
2666 return JNI_EINVAL;
2667 }
2668 if (FLAG_SET_CMDLINE(uintx, NonProfiledCodeHeapSize, (uintx)long_NonProfiledCodeHeapSize) != Flag::SUCCESS) {
2669 return JNI_EINVAL;
2670 }
2671 // -green
2672 } else if (match_option(option, "-green")) {
2673 jio_fprintf(defaultStream::error_stream(),
2674 "Green threads support not available\n");
2675 return JNI_EINVAL;
2676 // -native
2677 } else if (match_option(option, "-native")) {
2678 // HotSpot always uses native threads, ignore silently for compatibility
2679 // -Xrs
2680 } else if (match_option(option, "-Xrs")) {
2681 // Classic/EVM option, new functionality
2682 if (FLAG_SET_CMDLINE(bool, ReduceSignalUsage, true) != Flag::SUCCESS) {
2683 return JNI_EINVAL;
2684 }
2685 } else if (match_option(option, "-Xusealtsigs")) {
2686 // change default internal VM signals used - lower case for back compat
2687 if (FLAG_SET_CMDLINE(bool, UseAltSigs, true) != Flag::SUCCESS) {
2688 return JNI_EINVAL;
2689 }
2690 // -Xprof
2691 } else if (match_option(option, "-Xprof")) {
2692 #if INCLUDE_FPROF
2693 _has_profile = true;
2694 #else // INCLUDE_FPROF
2695 jio_fprintf(defaultStream::error_stream(),
2696 "Flat profiling is not supported in this VM.\n");
2697 return JNI_ERR;
2698 #endif // INCLUDE_FPROF
2699 // -Xconcurrentio
2700 } else if (match_option(option, "-Xconcurrentio")) {
2701 if (FLAG_SET_CMDLINE(bool, UseLWPSynchronization, true) != Flag::SUCCESS) {
2702 return JNI_EINVAL;
2703 }
2704 if (FLAG_SET_CMDLINE(bool, BackgroundCompilation, false) != Flag::SUCCESS) {
2705 return JNI_EINVAL;
2706 }
2707 if (FLAG_SET_CMDLINE(intx, DeferThrSuspendLoopCount, 1) != Flag::SUCCESS) {
2708 return JNI_EINVAL;
2709 }
2710 if (FLAG_SET_CMDLINE(bool, UseTLAB, false) != Flag::SUCCESS) {
2711 return JNI_EINVAL;
2712 }
2713 if (FLAG_SET_CMDLINE(size_t, NewSizeThreadIncrease, 16 * K) != Flag::SUCCESS) { // 20Kb per thread added to new generation
2714 return JNI_EINVAL;
2715 }
2716
2717 // -Xinternalversion
2718 } else if (match_option(option, "-Xinternalversion")) {
2719 jio_fprintf(defaultStream::output_stream(), "%s\n",
2720 VM_Version::internal_vm_info_string());
2721 vm_exit(0);
2722 #ifndef PRODUCT
2723 // -Xprintflags
2724 } else if (match_option(option, "-Xprintflags")) {
2725 CommandLineFlags::printFlags(tty, false);
2726 vm_exit(0);
2727 #endif
2728 // -D
2729 } else if (match_option(option, "-D", &tail)) {
2730 const char* value;
2731 if (match_option(option, "-Djava.endorsed.dirs=", &value) &&
2732 *value!= '\0' && strcmp(value, "\"\"") != 0) {
2733 // abort if -Djava.endorsed.dirs is set
2734 jio_fprintf(defaultStream::output_stream(),
2735 "-Djava.endorsed.dirs=%s is not supported. Endorsed standards and standalone APIs\n"
2736 "in modular form will be supported via the concept of upgradeable modules.\n", value);
2737 return JNI_EINVAL;
2738 }
2739 if (match_option(option, "-Djava.ext.dirs=", &value) &&
2740 *value != '\0' && strcmp(value, "\"\"") != 0) {
2741 // abort if -Djava.ext.dirs is set
2742 jio_fprintf(defaultStream::output_stream(),
2743 "-Djava.ext.dirs=%s is not supported. Use -classpath instead.\n", value);
2744 return JNI_EINVAL;
2745 }
2746
2747 if (!add_property(tail)) {
2748 return JNI_ENOMEM;
2749 }
2750 // Out of the box management support
2751 if (match_option(option, "-Dcom.sun.management", &tail)) {
2752 #if INCLUDE_MANAGEMENT
2753 if (FLAG_SET_CMDLINE(bool, ManagementServer, true) != Flag::SUCCESS) {
2754 return JNI_EINVAL;
2755 }
2756 #else
2757 jio_fprintf(defaultStream::output_stream(),
2758 "-Dcom.sun.management is not supported in this VM.\n");
2759 return JNI_ERR;
2760 #endif
2761 }
2762 // -Xint
2763 } else if (match_option(option, "-Xint")) {
2764 set_mode_flags(_int);
2765 // -Xmixed
2766 } else if (match_option(option, "-Xmixed")) {
2767 set_mode_flags(_mixed);
2768 // -Xcomp
2769 } else if (match_option(option, "-Xcomp")) {
2770 // for testing the compiler; turn off all flags that inhibit compilation
2771 set_mode_flags(_comp);
2772 // -Xshare:dump
2773 } else if (match_option(option, "-Xshare:dump")) {
2774 if (FLAG_SET_CMDLINE(bool, DumpSharedSpaces, true) != Flag::SUCCESS) {
2775 return JNI_EINVAL;
2776 }
2777 set_mode_flags(_int); // Prevent compilation, which creates objects
2778 // -Xshare:on
2779 } else if (match_option(option, "-Xshare:on")) {
2780 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
2781 return JNI_EINVAL;
2782 }
2783 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
2784 return JNI_EINVAL;
2785 }
2786 // -Xshare:auto
2787 } else if (match_option(option, "-Xshare:auto")) {
2788 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
2789 return JNI_EINVAL;
2790 }
2791 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
2792 return JNI_EINVAL;
2793 }
2794 // -Xshare:off
2795 } else if (match_option(option, "-Xshare:off")) {
2796 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, false) != Flag::SUCCESS) {
2797 return JNI_EINVAL;
2798 }
2799 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false) != Flag::SUCCESS) {
2800 return JNI_EINVAL;
2801 }
2802 // -Xverify
2803 } else if (match_option(option, "-Xverify", &tail)) {
2804 if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) {
2805 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, true) != Flag::SUCCESS) {
2806 return JNI_EINVAL;
2807 }
2808 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
2809 return JNI_EINVAL;
2810 }
2811 } else if (strcmp(tail, ":remote") == 0) {
2812 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
2813 return JNI_EINVAL;
2814 }
2815 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, true) != Flag::SUCCESS) {
2816 return JNI_EINVAL;
2817 }
2818 } else if (strcmp(tail, ":none") == 0) {
2819 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationLocal, false) != Flag::SUCCESS) {
2820 return JNI_EINVAL;
2821 }
2822 if (FLAG_SET_CMDLINE(bool, BytecodeVerificationRemote, false) != Flag::SUCCESS) {
2823 return JNI_EINVAL;
2824 }
2825 } else if (is_bad_option(option, args->ignoreUnrecognized, "verification")) {
2826 return JNI_EINVAL;
2827 }
2828 // -Xdebug
2829 } else if (match_option(option, "-Xdebug")) {
2830 // note this flag has been used, then ignore
2831 set_xdebug_mode(true);
2832 // -Xnoagent
2833 } else if (match_option(option, "-Xnoagent")) {
2834 // For compatibility with classic. HotSpot refuses to load the old style agent.dll.
2835 } else if (match_option(option, "-Xloggc:", &tail)) {
2836 // Redirect GC output to the file. -Xloggc:<filename>
2837 // ostream_init_log(), when called will use this filename
2838 // to initialize a fileStream.
2839 _gc_log_filename = os::strdup_check_oom(tail);
2840 if (!is_filename_valid(_gc_log_filename)) {
2841 jio_fprintf(defaultStream::output_stream(),
2842 "Invalid file name for use with -Xloggc: Filename can only contain the "
2843 "characters [A-Z][a-z][0-9]-_.%%[p|t] but it has been %s\n"
2844 "Note %%p or %%t can only be used once\n", _gc_log_filename);
2845 return JNI_EINVAL;
2846 }
2847 if (FLAG_SET_CMDLINE(bool, PrintGC, true) != Flag::SUCCESS) {
2848 return JNI_EINVAL;
2849 }
2850 if (FLAG_SET_CMDLINE(bool, PrintGCTimeStamps, true) != Flag::SUCCESS) {
2851 return JNI_EINVAL;
2852 }
2853 // JNI hooks
2854 } else if (match_option(option, "-Xcheck", &tail)) {
2855 if (!strcmp(tail, ":jni")) {
2856 #if !INCLUDE_JNI_CHECK
2857 warning("JNI CHECKING is not supported in this VM");
2858 #else
2859 CheckJNICalls = true;
2860 #endif // INCLUDE_JNI_CHECK
2861 } else if (is_bad_option(option, args->ignoreUnrecognized,
2862 "check")) {
2863 return JNI_EINVAL;
2864 }
2865 } else if (match_option(option, "vfprintf")) {
2866 _vfprintf_hook = CAST_TO_FN_PTR(vfprintf_hook_t, option->extraInfo);
2867 } else if (match_option(option, "exit")) {
2868 _exit_hook = CAST_TO_FN_PTR(exit_hook_t, option->extraInfo);
2869 } else if (match_option(option, "abort")) {
2870 _abort_hook = CAST_TO_FN_PTR(abort_hook_t, option->extraInfo);
2871 // -XX:+AggressiveHeap
2872 } else if (match_option(option, "-XX:+AggressiveHeap")) {
2873
2874 // This option inspects the machine and attempts to set various
2875 // parameters to be optimal for long-running, memory allocation
2876 // intensive jobs. It is intended for machines with large
2877 // amounts of cpu and memory.
2878
2879 // initHeapSize is needed since _initial_heap_size is 4 bytes on a 32 bit
2880 // VM, but we may not be able to represent the total physical memory
2881 // available (like having 8gb of memory on a box but using a 32bit VM).
2882 // Thus, we need to make sure we're using a julong for intermediate
2883 // calculations.
2884 julong initHeapSize;
2885 julong total_memory = os::physical_memory();
2886
2887 if (total_memory < (julong)256*M) {
2888 jio_fprintf(defaultStream::error_stream(),
2889 "You need at least 256mb of memory to use -XX:+AggressiveHeap\n");
2890 vm_exit(1);
2891 }
2892
2893 // The heap size is half of available memory, or (at most)
2894 // all of possible memory less 160mb (leaving room for the OS
2895 // when using ISM). This is the maximum; because adaptive sizing
2896 // is turned on below, the actual space used may be smaller.
2897
2898 initHeapSize = MIN2(total_memory / (julong)2,
2899 total_memory - (julong)160*M);
2900
2901 initHeapSize = limit_by_allocatable_memory(initHeapSize);
2902
2903 if (FLAG_IS_DEFAULT(MaxHeapSize)) {
2904 if (FLAG_SET_CMDLINE(size_t, MaxHeapSize, initHeapSize) != Flag::SUCCESS) {
2905 return JNI_EINVAL;
2906 }
2907 if (FLAG_SET_CMDLINE(size_t, InitialHeapSize, initHeapSize) != Flag::SUCCESS) {
2908 return JNI_EINVAL;
2909 }
2910 // Currently the minimum size and the initial heap sizes are the same.
2911 set_min_heap_size(initHeapSize);
2912 }
2913 if (FLAG_IS_DEFAULT(NewSize)) {
2914 // Make the young generation 3/8ths of the total heap.
2915 if (FLAG_SET_CMDLINE(size_t, NewSize,
2916 ((julong)MaxHeapSize / (julong)8) * (julong)3) != Flag::SUCCESS) {
2917 return JNI_EINVAL;
2918 }
2919 if (FLAG_SET_CMDLINE(size_t, MaxNewSize, NewSize) != Flag::SUCCESS) {
2920 return JNI_EINVAL;
2921 }
2922 }
2923
2924 #if !defined(_ALLBSD_SOURCE) && !defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
2925 FLAG_SET_DEFAULT(UseLargePages, true);
2926 #endif
2927
2928 // Increase some data structure sizes for efficiency
2929 if (FLAG_SET_CMDLINE(size_t, BaseFootPrintEstimate, MaxHeapSize) != Flag::SUCCESS) {
2930 return JNI_EINVAL;
2931 }
2932 if (FLAG_SET_CMDLINE(bool, ResizeTLAB, false) != Flag::SUCCESS) {
2933 return JNI_EINVAL;
2934 }
2935 if (FLAG_SET_CMDLINE(size_t, TLABSize, 256*K) != Flag::SUCCESS) {
2936 return JNI_EINVAL;
2937 }
2938
2939 // See the OldPLABSize comment below, but replace 'after promotion'
2940 // with 'after copying'. YoungPLABSize is the size of the survivor
2941 // space per-gc-thread buffers. The default is 4kw.
2942 if (FLAG_SET_CMDLINE(size_t, YoungPLABSize, 256*K) != Flag::SUCCESS) { // Note: this is in words
2943 return JNI_EINVAL;
2944 }
2945
2946 // OldPLABSize is the size of the buffers in the old gen that
2947 // UseParallelGC uses to promote live data that doesn't fit in the
2948 // survivor spaces. At any given time, there's one for each gc thread.
2949 // The default size is 1kw. These buffers are rarely used, since the
2950 // survivor spaces are usually big enough. For specjbb, however, there
2951 // are occasions when there's lots of live data in the young gen
2952 // and we end up promoting some of it. We don't have a definite
2953 // explanation for why bumping OldPLABSize helps, but the theory
2954 // is that a bigger PLAB results in retaining something like the
2955 // original allocation order after promotion, which improves mutator
2956 // locality. A minor effect may be that larger PLABs reduce the
2957 // number of PLAB allocation events during gc. The value of 8kw
2958 // was arrived at by experimenting with specjbb.
2959 if (FLAG_SET_CMDLINE(size_t, OldPLABSize, 8*K) != Flag::SUCCESS) { // Note: this is in words
2960 return JNI_EINVAL;
2961 }
2962
2963 // Enable parallel GC and adaptive generation sizing
2964 if (FLAG_SET_CMDLINE(bool, UseParallelGC, true) != Flag::SUCCESS) {
2965 return JNI_EINVAL;
2966 }
2967 FLAG_SET_DEFAULT(ParallelGCThreads,
2968 Abstract_VM_Version::parallel_worker_threads());
2969
2970 // Encourage steady state memory management
2971 if (FLAG_SET_CMDLINE(uintx, ThresholdTolerance, 100) != Flag::SUCCESS) {
2972 return JNI_EINVAL;
2973 }
2974
2975 // This appears to improve mutator locality
2976 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
2977 return JNI_EINVAL;
2978 }
2979
2980 // Get around early Solaris scheduling bug
2981 // (affinity vs other jobs on system)
2982 // but disallow DR and offlining (5008695).
2983 if (FLAG_SET_CMDLINE(bool, BindGCTaskThreadsToCPUs, true) != Flag::SUCCESS) {
2984 return JNI_EINVAL;
2985 }
2986
2987 // Need to keep consistency of MaxTenuringThreshold and AlwaysTenure/NeverTenure;
2988 // and the last option wins.
2989 } else if (match_option(option, "-XX:+NeverTenure")) {
2990 if (FLAG_SET_CMDLINE(bool, NeverTenure, true) != Flag::SUCCESS) {
2991 return JNI_EINVAL;
2992 }
2993 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
2994 return JNI_EINVAL;
2995 }
2996 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, markOopDesc::max_age + 1) != Flag::SUCCESS) {
2997 return JNI_EINVAL;
2998 }
2999 } else if (match_option(option, "-XX:+AlwaysTenure")) {
3000 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3001 return JNI_EINVAL;
3002 }
3003 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
3004 return JNI_EINVAL;
3005 }
3006 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, 0) != Flag::SUCCESS) {
3007 return JNI_EINVAL;
3008 }
3009 } else if (match_option(option, "-XX:MaxTenuringThreshold=", &tail)) {
3010 uintx max_tenuring_thresh = 0;
3011 if (!parse_uintx(tail, &max_tenuring_thresh, 0)) {
3012 jio_fprintf(defaultStream::error_stream(),
3013 "Improperly specified VM option \'MaxTenuringThreshold=%s\'\n", tail);
3014 return JNI_EINVAL;
3015 }
3016
3017 if (FLAG_SET_CMDLINE(uintx, MaxTenuringThreshold, max_tenuring_thresh) != Flag::SUCCESS) {
3018 return JNI_EINVAL;
3019 }
3020
3021 if (MaxTenuringThreshold == 0) {
3022 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3023 return JNI_EINVAL;
3024 }
3025 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, true) != Flag::SUCCESS) {
3026 return JNI_EINVAL;
3027 }
3028 } else {
3029 if (FLAG_SET_CMDLINE(bool, NeverTenure, false) != Flag::SUCCESS) {
3030 return JNI_EINVAL;
3031 }
3032 if (FLAG_SET_CMDLINE(bool, AlwaysTenure, false) != Flag::SUCCESS) {
3033 return JNI_EINVAL;
3034 }
3035 }
3036 } else if (match_option(option, "-XX:+DisplayVMOutputToStderr")) {
3037 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, false) != Flag::SUCCESS) {
3038 return JNI_EINVAL;
3039 }
3040 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, true) != Flag::SUCCESS) {
3041 return JNI_EINVAL;
3042 }
3043 } else if (match_option(option, "-XX:+DisplayVMOutputToStdout")) {
3044 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStderr, false) != Flag::SUCCESS) {
3045 return JNI_EINVAL;
3046 }
3047 if (FLAG_SET_CMDLINE(bool, DisplayVMOutputToStdout, true) != Flag::SUCCESS) {
3048 return JNI_EINVAL;
3049 }
3050 } else if (match_option(option, "-XX:+ExtendedDTraceProbes")) {
3051 #if defined(DTRACE_ENABLED)
3052 if (FLAG_SET_CMDLINE(bool, ExtendedDTraceProbes, true) != Flag::SUCCESS) {
3053 return JNI_EINVAL;
3054 }
3055 if (FLAG_SET_CMDLINE(bool, DTraceMethodProbes, true) != Flag::SUCCESS) {
3056 return JNI_EINVAL;
3057 }
3058 if (FLAG_SET_CMDLINE(bool, DTraceAllocProbes, true) != Flag::SUCCESS) {
3059 return JNI_EINVAL;
3060 }
3061 if (FLAG_SET_CMDLINE(bool, DTraceMonitorProbes, true) != Flag::SUCCESS) {
3062 return JNI_EINVAL;
3063 }
3064 #else // defined(DTRACE_ENABLED)
3065 jio_fprintf(defaultStream::error_stream(),
3066 "ExtendedDTraceProbes flag is not applicable for this configuration\n");
3067 return JNI_EINVAL;
3068 #endif // defined(DTRACE_ENABLED)
3069 #ifdef ASSERT
3070 } else if (match_option(option, "-XX:+FullGCALot")) {
3071 if (FLAG_SET_CMDLINE(bool, FullGCALot, true) != Flag::SUCCESS) {
3072 return JNI_EINVAL;
3073 }
3074 // disable scavenge before parallel mark-compact
3075 if (FLAG_SET_CMDLINE(bool, ScavengeBeforeFullGC, false) != Flag::SUCCESS) {
3076 return JNI_EINVAL;
3077 }
3078 #endif
3079 } else if (match_option(option, "-XX:CMSMarkStackSize=", &tail) ||
3080 match_option(option, "-XX:G1MarkStackSize=", &tail)) {
3081 julong stack_size = 0;
3082 ArgsRange errcode = parse_memory_size(tail, &stack_size, 1);
3083 if (errcode != arg_in_range) {
3084 jio_fprintf(defaultStream::error_stream(),
3085 "Invalid mark stack size: %s\n", option->optionString);
3086 describe_range_error(errcode);
3087 return JNI_EINVAL;
3088 }
3089 jio_fprintf(defaultStream::error_stream(),
3090 "Please use -XX:MarkStackSize in place of "
3091 "-XX:CMSMarkStackSize or -XX:G1MarkStackSize in the future\n");
3092 if (FLAG_SET_CMDLINE(size_t, MarkStackSize, stack_size) != Flag::SUCCESS) {
3093 return JNI_EINVAL;
3094 }
3095 } else if (match_option(option, "-XX:CMSMarkStackSizeMax=", &tail)) {
3096 julong max_stack_size = 0;
3097 ArgsRange errcode = parse_memory_size(tail, &max_stack_size, 1);
3098 if (errcode != arg_in_range) {
3099 jio_fprintf(defaultStream::error_stream(),
3100 "Invalid maximum mark stack size: %s\n",
3101 option->optionString);
3102 describe_range_error(errcode);
3103 return JNI_EINVAL;
3104 }
3105 jio_fprintf(defaultStream::error_stream(),
3106 "Please use -XX:MarkStackSizeMax in place of "
3107 "-XX:CMSMarkStackSizeMax in the future\n");
3108 if (FLAG_SET_CMDLINE(size_t, MarkStackSizeMax, max_stack_size) != Flag::SUCCESS) {
3109 return JNI_EINVAL;
3110 }
3111 } else if (match_option(option, "-XX:ParallelMarkingThreads=", &tail) ||
3112 match_option(option, "-XX:ParallelCMSThreads=", &tail)) {
3113 uintx conc_threads = 0;
3114 if (!parse_uintx(tail, &conc_threads, 1)) {
3115 jio_fprintf(defaultStream::error_stream(),
3116 "Invalid concurrent threads: %s\n", option->optionString);
3117 return JNI_EINVAL;
3118 }
3119 jio_fprintf(defaultStream::error_stream(),
3120 "Please use -XX:ConcGCThreads in place of "
3121 "-XX:ParallelMarkingThreads or -XX:ParallelCMSThreads in the future\n");
3122 if (FLAG_SET_CMDLINE(uint, ConcGCThreads, conc_threads) != Flag::SUCCESS) {
3123 return JNI_EINVAL;
3124 }
3125 } else if (match_option(option, "-XX:MaxDirectMemorySize=", &tail)) {
3126 julong max_direct_memory_size = 0;
3127 ArgsRange errcode = parse_memory_size(tail, &max_direct_memory_size, 0);
3128 if (errcode != arg_in_range) {
3129 jio_fprintf(defaultStream::error_stream(),
3130 "Invalid maximum direct memory size: %s\n",
3131 option->optionString);
3132 describe_range_error(errcode);
3133 return JNI_EINVAL;
3134 }
3135 if (FLAG_SET_CMDLINE(size_t, MaxDirectMemorySize, max_direct_memory_size) != Flag::SUCCESS) {
3136 return JNI_EINVAL;
3137 }
3138 #if !INCLUDE_MANAGEMENT
3139 } else if (match_option(option, "-XX:+ManagementServer")) {
3140 jio_fprintf(defaultStream::error_stream(),
3141 "ManagementServer is not supported in this VM.\n");
3142 return JNI_ERR;
3143 #endif // INCLUDE_MANAGEMENT
3144 // CreateMinidumpOnCrash is removed, and replaced by CreateCoredumpOnCrash
3145 } else if (match_option(option, "-XX:+CreateMinidumpOnCrash")) {
3146 if (FLAG_SET_CMDLINE(bool, CreateCoredumpOnCrash, true) != Flag::SUCCESS) {
3147 return JNI_EINVAL;
3148 }
3149 jio_fprintf(defaultStream::output_stream(),
3150 "CreateMinidumpOnCrash is replaced by CreateCoredumpOnCrash: CreateCoredumpOnCrash is on\n");
3151 } else if (match_option(option, "-XX:-CreateMinidumpOnCrash")) {
3152 if (FLAG_SET_CMDLINE(bool, CreateCoredumpOnCrash, false) != Flag::SUCCESS) {
3153 return JNI_EINVAL;
3154 }
3155 jio_fprintf(defaultStream::output_stream(),
3156 "CreateMinidumpOnCrash is replaced by CreateCoredumpOnCrash: CreateCoredumpOnCrash is off\n");
3157 } else if (match_option(option, "-XX:", &tail)) { // -XX:xxxx
3158 // Skip -XX:Flags= and -XX:VMOptionsFile= since those cases have
3159 // already been handled
3160 if ((strncmp(tail, "Flags=", strlen("Flags=")) != 0) &&
3161 (strncmp(tail, "VMOptionsFile=", strlen("VMOptionsFile=")) != 0)) {
3162 if (!process_argument(tail, args->ignoreUnrecognized, origin)) {
3163 return JNI_EINVAL;
3164 }
3165 }
3166 // Unknown option
3167 } else if (is_bad_option(option, args->ignoreUnrecognized)) {
3168 return JNI_ERR;
3169 }
3170 }
3171
3172 // PrintSharedArchiveAndExit will turn on
3173 // -Xshare:on
3174 // -XX:+TraceClassPaths
3175 if (PrintSharedArchiveAndExit) {
3176 if (FLAG_SET_CMDLINE(bool, UseSharedSpaces, true) != Flag::SUCCESS) {
3177 return JNI_EINVAL;
3178 }
3179 if (FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true) != Flag::SUCCESS) {
3180 return JNI_EINVAL;
3181 }
3182 if (FLAG_SET_CMDLINE(bool, TraceClassPaths, true) != Flag::SUCCESS) {
3183 return JNI_EINVAL;
3184 }
3185 }
3186
3187 // Change the default value for flags which have different default values
3188 // when working with older JDKs.
3189 #ifdef LINUX
3190 if (JDK_Version::current().compare_major(6) <= 0 &&
3191 FLAG_IS_DEFAULT(UseLinuxPosixThreadCPUClocks)) {
3192 FLAG_SET_DEFAULT(UseLinuxPosixThreadCPUClocks, false);
3193 }
3194 #endif // LINUX
3195 fix_appclasspath();
3196 return JNI_OK;
3197 }
3198
3199 // Remove all empty paths from the app classpath (if IgnoreEmptyClassPaths is enabled)
3200 //
3201 // This is necessary because some apps like to specify classpath like -cp foo.jar:${XYZ}:bar.jar
3202 // in their start-up scripts. If XYZ is empty, the classpath will look like "-cp foo.jar::bar.jar".
3203 // Java treats such empty paths as if the user specified "-cp foo.jar:.:bar.jar". I.e., an empty
3204 // path is treated as the current directory.
3205 //
3206 // This causes problems with CDS, which requires that all directories specified in the classpath
3207 // must be empty. In most cases, applications do NOT want to load classes from the current
3208 // directory anyway. Adding -XX:+IgnoreEmptyClassPaths will make these applications' start-up
3209 // scripts compatible with CDS.
3210 void Arguments::fix_appclasspath() {
3211 if (IgnoreEmptyClassPaths) {
3212 const char separator = *os::path_separator();
3213 const char* src = _java_class_path->value();
3214
3215 // skip over all the leading empty paths
3216 while (*src == separator) {
3217 src ++;
3218 }
3219
3220 char* copy = os::strdup_check_oom(src, mtInternal);
3221
3222 // trim all trailing empty paths
3223 for (char* tail = copy + strlen(copy) - 1; tail >= copy && *tail == separator; tail--) {
3224 *tail = '\0';
3225 }
3226
3227 char from[3] = {separator, separator, '\0'};
3228 char to [2] = {separator, '\0'};
3229 while (StringUtils::replace_no_expand(copy, from, to) > 0) {
3230 // Keep replacing "::" -> ":" until we have no more "::" (non-windows)
3231 // Keep replacing ";;" -> ";" until we have no more ";;" (windows)
3232 }
3233
3234 _java_class_path->set_value(copy);
3235 FreeHeap(copy); // a copy was made by set_value, so don't need this anymore
3236 }
3237
3238 if (!PrintSharedArchiveAndExit) {
3239 ClassLoader::trace_class_path("[classpath: ", _java_class_path->value());
3240 }
3241 }
3242
3243 static bool has_jar_files(const char* directory) {
3244 DIR* dir = os::opendir(directory);
3245 if (dir == NULL) return false;
3246
3247 struct dirent *entry;
3248 char *dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(directory), mtInternal);
3249 bool hasJarFile = false;
3250 while (!hasJarFile && (entry = os::readdir(dir, (dirent *) dbuf)) != NULL) {
3251 const char* name = entry->d_name;
3252 const char* ext = name + strlen(name) - 4;
3253 hasJarFile = ext > name && (os::file_name_strcmp(ext, ".jar") == 0);
3254 }
3255 FREE_C_HEAP_ARRAY(char, dbuf);
3256 os::closedir(dir);
3257 return hasJarFile ;
3258 }
3259
3260 static int check_non_empty_dirs(const char* path) {
3261 const char separator = *os::path_separator();
3262 const char* const end = path + strlen(path);
3263 int nonEmptyDirs = 0;
3264 while (path < end) {
3265 const char* tmp_end = strchr(path, separator);
3266 if (tmp_end == NULL) {
3267 if (has_jar_files(path)) {
3268 nonEmptyDirs++;
3269 jio_fprintf(defaultStream::output_stream(),
3270 "Non-empty directory: %s\n", path);
3271 }
3272 path = end;
3273 } else {
3274 char* dirpath = NEW_C_HEAP_ARRAY(char, tmp_end - path + 1, mtInternal);
3275 memcpy(dirpath, path, tmp_end - path);
3276 dirpath[tmp_end - path] = '\0';
3277 if (has_jar_files(dirpath)) {
3278 nonEmptyDirs++;
3279 jio_fprintf(defaultStream::output_stream(),
3280 "Non-empty directory: %s\n", dirpath);
3281 }
3282 FREE_C_HEAP_ARRAY(char, dirpath);
3283 path = tmp_end + 1;
3284 }
3285 }
3286 return nonEmptyDirs;
3287 }
3288
3289 jint Arguments::finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required) {
3290 // check if the default lib/endorsed directory exists; if so, error
3291 char path[JVM_MAXPATHLEN];
3292 const char* fileSep = os::file_separator();
3293 sprintf(path, "%s%slib%sendorsed", Arguments::get_java_home(), fileSep, fileSep);
3294
3295 if (CheckEndorsedAndExtDirs) {
3296 int nonEmptyDirs = 0;
3297 // check endorsed directory
3298 nonEmptyDirs += check_non_empty_dirs(path);
3299 // check the extension directories
3300 nonEmptyDirs += check_non_empty_dirs(Arguments::get_ext_dirs());
3301 if (nonEmptyDirs > 0) {
3302 return JNI_ERR;
3303 }
3304 }
3305
3306 DIR* dir = os::opendir(path);
3307 if (dir != NULL) {
3308 jio_fprintf(defaultStream::output_stream(),
3309 "<JAVA_HOME>/lib/endorsed is not supported. Endorsed standards and standalone APIs\n"
3310 "in modular form will be supported via the concept of upgradeable modules.\n");
3311 os::closedir(dir);
3312 return JNI_ERR;
3313 }
3314
3315 sprintf(path, "%s%slib%sext", Arguments::get_java_home(), fileSep, fileSep);
3316 dir = os::opendir(path);
3317 if (dir != NULL) {
3318 jio_fprintf(defaultStream::output_stream(),
3319 "<JAVA_HOME>/lib/ext exists, extensions mechanism no longer supported; "
3320 "Use -classpath instead.\n.");
3321 os::closedir(dir);
3322 return JNI_ERR;
3323 }
3324
3325 if (scp_assembly_required) {
3326 // Assemble the bootclasspath elements into the final path.
3327 char *combined_path = scp_p->combined_path();
3328 Arguments::set_sysclasspath(combined_path);
3329 FREE_C_HEAP_ARRAY(char, combined_path);
3330 }
3331
3332 // This must be done after all arguments have been processed.
3333 // java_compiler() true means set to "NONE" or empty.
3334 if (java_compiler() && !xdebug_mode()) {
3335 // For backwards compatibility, we switch to interpreted mode if
3336 // -Djava.compiler="NONE" or "" is specified AND "-Xdebug" was
3337 // not specified.
3338 set_mode_flags(_int);
3339 }
3340
3341 // CompileThresholdScaling == 0.0 is same as -Xint: Disable compilation (enable interpreter-only mode),
3342 // but like -Xint, leave compilation thresholds unaffected.
3343 // With tiered compilation disabled, setting CompileThreshold to 0 disables compilation as well.
3344 if ((CompileThresholdScaling == 0.0) || (!TieredCompilation && CompileThreshold == 0)) {
3345 set_mode_flags(_int);
3346 }
3347
3348 // eventually fix up InitialTenuringThreshold if only MaxTenuringThreshold is set
3349 if (FLAG_IS_DEFAULT(InitialTenuringThreshold) && (InitialTenuringThreshold > MaxTenuringThreshold)) {
3350 FLAG_SET_ERGO(uintx, InitialTenuringThreshold, MaxTenuringThreshold);
3351 }
3352
3353 #ifndef COMPILER2
3354 // Don't degrade server performance for footprint
3355 if (FLAG_IS_DEFAULT(UseLargePages) &&
3356 MaxHeapSize < LargePageHeapSizeThreshold) {
3357 // No need for large granularity pages w/small heaps.
3358 // Note that large pages are enabled/disabled for both the
3359 // Java heap and the code cache.
3360 FLAG_SET_DEFAULT(UseLargePages, false);
3361 }
3362
3363 #else
3364 if (!FLAG_IS_DEFAULT(OptoLoopAlignment) && FLAG_IS_DEFAULT(MaxLoopPad)) {
3365 FLAG_SET_DEFAULT(MaxLoopPad, OptoLoopAlignment-1);
3366 }
3367 #endif
3368
3369 #ifndef TIERED
3370 // Tiered compilation is undefined.
3371 UNSUPPORTED_OPTION(TieredCompilation, "TieredCompilation");
3372 #endif
3373
3374 // If we are running in a headless jre, force java.awt.headless property
3375 // to be true unless the property has already been set.
3376 // Also allow the OS environment variable JAVA_AWT_HEADLESS to set headless state.
3377 if (os::is_headless_jre()) {
3378 const char* headless = Arguments::get_property("java.awt.headless");
3379 if (headless == NULL) {
3380 const char *headless_env = ::getenv("JAVA_AWT_HEADLESS");
3381 if (headless_env == NULL) {
3382 if (!add_property("java.awt.headless=true")) {
3383 return JNI_ENOMEM;
3384 }
3385 } else {
3386 char buffer[256];
3387 jio_snprintf(buffer, sizeof(buffer), "java.awt.headless=%s", headless_env);
3388 if (!add_property(buffer)) {
3389 return JNI_ENOMEM;
3390 }
3391 }
3392 }
3393 }
3394
3395 if (UseConcMarkSweepGC && FLAG_IS_DEFAULT(UseParNewGC) && !UseParNewGC) {
3396 // CMS can only be used with ParNew
3397 FLAG_SET_ERGO(bool, UseParNewGC, true);
3398 }
3399
3400 if (!check_vm_args_consistency()) {
3401 return JNI_ERR;
3402 }
3403
3404 return JNI_OK;
3405 }
3406
3407 // Helper class for controlling the lifetime of JavaVMInitArgs
3408 // objects. The contents of the JavaVMInitArgs are guaranteed to be
3409 // deleted on the destruction of the ScopedVMInitArgs object.
3410 class ScopedVMInitArgs : public StackObj {
3411 private:
3412 JavaVMInitArgs _args;
3413 bool _is_set;
3414
3415 public:
3416 ScopedVMInitArgs() {
3417 _args.version = JNI_VERSION_1_2;
3418 _args.nOptions = 0;
3419 _args.options = NULL;
3420 _args.ignoreUnrecognized = false;
3421 _is_set = false;
3422 }
3423
3424 // Populates the JavaVMInitArgs object represented by this
3425 // ScopedVMInitArgs object with the arguments in options. The
3426 // allocated memory is deleted by the destructor. If this method
3427 // returns anything other than JNI_OK, then this object is in a
3428 // partially constructed state, and should be abandoned.
3429 jint set_args(GrowableArray<JavaVMOption>* options) {
3430 _is_set = true;
3431 JavaVMOption* options_arr = NEW_C_HEAP_ARRAY_RETURN_NULL(
3432 JavaVMOption, options->length(), mtInternal);
3433 if (options_arr == NULL) {
3434 return JNI_ENOMEM;
3435 }
3436 _args.options = options_arr;
3437
3438 for (int i = 0; i < options->length(); i++) {
3439 options_arr[i] = options->at(i);
3440 options_arr[i].optionString = os::strdup(options_arr[i].optionString);
3441 if (options_arr[i].optionString == NULL) {
3442 // Rely on the destructor to do cleanup.
3443 _args.nOptions = i;
3444 return JNI_ENOMEM;
3445 }
3446 }
3447
3448 _args.nOptions = options->length();
3449 _args.ignoreUnrecognized = IgnoreUnrecognizedVMOptions;
3450 return JNI_OK;
3451 }
3452
3453 JavaVMInitArgs* get() { return &_args; }
3454 bool is_set() { return _is_set; }
3455
3456 ~ScopedVMInitArgs() {
3457 if (_args.options == NULL) return;
3458 for (int i = 0; i < _args.nOptions; i++) {
3459 os::free(_args.options[i].optionString);
3460 }
3461 FREE_C_HEAP_ARRAY(JavaVMOption, _args.options);
3462 }
3463
3464 // Insert options into this option list, to replace option at
3465 // vm_options_file_pos (-XX:VMOptionsFile)
3466 jint insert(const JavaVMInitArgs* args,
3467 const JavaVMInitArgs* args_to_insert,
3468 const int vm_options_file_pos) {
3469 assert(_args.options == NULL, "shouldn't be set yet");
3470 assert(args_to_insert->nOptions != 0, "there should be args to insert");
3471 assert(vm_options_file_pos != -1, "vm_options_file_pos should be set");
3472
3473 int length = args->nOptions + args_to_insert->nOptions - 1;
3474 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtInternal)
3475 GrowableArray<JavaVMOption>(length, true); // Construct new option array
3476 for (int i = 0; i < args->nOptions; i++) {
3477 if (i == vm_options_file_pos) {
3478 // insert the new options starting at the same place as the
3479 // -XX:VMOptionsFile option
3480 for (int j = 0; j < args_to_insert->nOptions; j++) {
3481 options->push(args_to_insert->options[j]);
3482 }
3483 } else {
3484 options->push(args->options[i]);
3485 }
3486 }
3487 // make into options array
3488 jint result = set_args(options);
3489 delete options;
3490 return result;
3491 }
3492 };
3493
3494 jint Arguments::parse_java_options_environment_variable(ScopedVMInitArgs* args) {
3495 return parse_options_environment_variable("_JAVA_OPTIONS", args);
3496 }
3497
3498 jint Arguments::parse_java_tool_options_environment_variable(ScopedVMInitArgs* args) {
3499 return parse_options_environment_variable("JAVA_TOOL_OPTIONS", args);
3500 }
3501
3502 jint Arguments::parse_options_environment_variable(const char* name,
3503 ScopedVMInitArgs* vm_args) {
3504 char *buffer = ::getenv(name);
3505
3506 // Don't check this environment variable if user has special privileges
3507 // (e.g. unix su command).
3508 if (buffer == NULL || os::have_special_privileges()) {
3509 return JNI_OK;
3510 }
3511
3512 if ((buffer = os::strdup(buffer)) == NULL) {
3513 return JNI_ENOMEM;
3514 }
3515
3516 int retcode = parse_options_buffer(name, buffer, strlen(buffer), vm_args);
3517
3518 os::free(buffer);
3519 return retcode;
3520 }
3521
3522 const int OPTION_BUFFER_SIZE = 1024;
3523
3524 jint Arguments::parse_vm_options_file(const char* file_name, ScopedVMInitArgs* vm_args) {
3525 // read file into buffer
3526 int fd = ::open(file_name, O_RDONLY);
3527 if (fd < 0) {
3528 jio_fprintf(defaultStream::error_stream(),
3529 "Could not open options file '%s'\n",
3530 file_name);
3531 return JNI_ERR;
3532 }
3533
3534 // '+ 1' for NULL termination even with max bytes
3535 int bytes_alloc = OPTION_BUFFER_SIZE + 1;
3536
3537 char *buf = NEW_C_HEAP_ARRAY_RETURN_NULL(char, bytes_alloc, mtInternal);
3538 if (NULL == buf) {
3539 jio_fprintf(defaultStream::error_stream(),
3540 "Could not allocate read buffer for options file parse\n");
3541 os::close(fd);
3542 return JNI_ENOMEM;
3543 }
3544
3545 memset(buf, 0, (unsigned)bytes_alloc);
3546
3547 // Fill buffer
3548 // Use ::read() instead of os::read because os::read()
3549 // might do a thread state transition
3550 // and it is too early for that here
3551
3552 int bytes_read = ::read(fd, (void *)buf, (unsigned)bytes_alloc);
3553 os::close(fd);
3554 if (bytes_read < 0) {
3555 FREE_C_HEAP_ARRAY(char, buf);
3556 jio_fprintf(defaultStream::error_stream(),
3557 "Could not read options file '%s'\n", file_name);
3558 return JNI_ERR;
3559 }
3560
3561 if (bytes_read == 0) {
3562 // tell caller there is no option data and that is ok
3563 FREE_C_HEAP_ARRAY(char, buf);
3564 return JNI_OK;
3565 }
3566
3567 // file is larger than OPTION_BUFFER_SIZE
3568 if (bytes_read > bytes_alloc - 1) {
3569 FREE_C_HEAP_ARRAY(char, buf);
3570 jio_fprintf(defaultStream::error_stream(),
3571 "Options file '%s' is larger than %d bytes.\n",
3572 file_name, bytes_alloc - 1);
3573 return JNI_EINVAL;
3574 }
3575
3576 int retcode = parse_options_buffer(file_name, buf, bytes_read, vm_args);
3577
3578 FREE_C_HEAP_ARRAY(char, buf);
3579 return retcode;
3580 }
3581
3582 jint Arguments::parse_options_buffer(const char* name, char* buffer, const size_t buf_len, ScopedVMInitArgs* vm_args) {
3583 GrowableArray<JavaVMOption> *options = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<JavaVMOption>(2, true); // Construct option array
3584
3585 // some pointers to help with parsing
3586 char *buffer_end = buffer + buf_len;
3587 char *opt_hd = buffer;
3588 char *wrt = buffer;
3589 char *rd = buffer;
3590
3591 // parse all options
3592 while (rd < buffer_end) {
3593 // skip leading white space from the input string
3594 while (rd < buffer_end && isspace(*rd)) {
3595 rd++;
3596 }
3597
3598 if (rd >= buffer_end) {
3599 break;
3600 }
3601
3602 // Remember this is where we found the head of the token.
3603 opt_hd = wrt;
3604
3605 // Tokens are strings of non white space characters separated
3606 // by one or more white spaces.
3607 while (rd < buffer_end && !isspace(*rd)) {
3608 if (*rd == '\'' || *rd == '"') { // handle a quoted string
3609 int quote = *rd; // matching quote to look for
3610 rd++; // don't copy open quote
3611 while (rd < buffer_end && *rd != quote) {
3612 // include everything (even spaces)
3613 // up until the close quote
3614 *wrt++ = *rd++; // copy to option string
3615 }
3616
3617 if (rd < buffer_end) {
3618 rd++; // don't copy close quote
3619 } else {
3620 // did not see closing quote
3621 jio_fprintf(defaultStream::error_stream(),
3622 "Unmatched quote in %s\n", name);
3623 delete options;
3624 return JNI_ERR;
3625 }
3626 } else {
3627 *wrt++ = *rd++; // copy to option string
3628 }
3629 }
3630
3631 // steal a white space character and set it to NULL
3632 *wrt++ = '\0';
3633 // We now have a complete token
3634
3635 JavaVMOption option;
3636 option.optionString = opt_hd;
3637
3638 options->append(option); // Fill in option
3639
3640 rd++; // Advance to next character
3641 }
3642
3643 // Fill out JavaVMInitArgs structure.
3644 jint status = vm_args->set_args(options);
3645
3646 delete options;
3647 return status;
3648 }
3649
3650 void Arguments::set_shared_spaces_flags() {
3651 if (DumpSharedSpaces) {
3652 if (RequireSharedSpaces) {
3653 warning("cannot dump shared archive while using shared archive");
3654 }
3655 UseSharedSpaces = false;
3656 #ifdef _LP64
3657 if (!UseCompressedOops || !UseCompressedClassPointers) {
3658 vm_exit_during_initialization(
3659 "Cannot dump shared archive when UseCompressedOops or UseCompressedClassPointers is off.", NULL);
3660 }
3661 } else {
3662 if (!UseCompressedOops || !UseCompressedClassPointers) {
3663 no_shared_spaces("UseCompressedOops and UseCompressedClassPointers must be on for UseSharedSpaces.");
3664 }
3665 #endif
3666 }
3667 }
3668
3669 #if !INCLUDE_ALL_GCS
3670 static void force_serial_gc() {
3671 FLAG_SET_DEFAULT(UseSerialGC, true);
3672 UNSUPPORTED_GC_OPTION(UseG1GC);
3673 UNSUPPORTED_GC_OPTION(UseParallelGC);
3674 UNSUPPORTED_GC_OPTION(UseParallelOldGC);
3675 UNSUPPORTED_GC_OPTION(UseConcMarkSweepGC);
3676 UNSUPPORTED_GC_OPTION(UseParNewGC);
3677 }
3678 #endif // INCLUDE_ALL_GCS
3679
3680 // Sharing support
3681 // Construct the path to the archive
3682 static char* get_shared_archive_path() {
3683 char *shared_archive_path;
3684 if (SharedArchiveFile == NULL) {
3685 char jvm_path[JVM_MAXPATHLEN];
3686 os::jvm_path(jvm_path, sizeof(jvm_path));
3687 char *end = strrchr(jvm_path, *os::file_separator());
3688 if (end != NULL) *end = '\0';
3689 size_t jvm_path_len = strlen(jvm_path);
3690 size_t file_sep_len = strlen(os::file_separator());
3691 const size_t len = jvm_path_len + file_sep_len + 20;
3692 shared_archive_path = NEW_C_HEAP_ARRAY(char, len, mtInternal);
3693 if (shared_archive_path != NULL) {
3694 jio_snprintf(shared_archive_path, len, "%s%sclasses.jsa",
3695 jvm_path, os::file_separator());
3696 }
3697 } else {
3698 shared_archive_path = os::strdup_check_oom(SharedArchiveFile, mtInternal);
3699 }
3700 return shared_archive_path;
3701 }
3702
3703 #ifndef PRODUCT
3704 // Determine whether LogVMOutput should be implicitly turned on.
3705 static bool use_vm_log() {
3706 if (LogCompilation || !FLAG_IS_DEFAULT(LogFile) ||
3707 PrintCompilation || PrintInlining || PrintDependencies || PrintNativeNMethods ||
3708 PrintDebugInfo || PrintRelocations || PrintNMethods || PrintExceptionHandlers ||
3709 PrintAssembly || TraceDeoptimization || TraceDependencies ||
3710 (VerifyDependencies && FLAG_IS_CMDLINE(VerifyDependencies))) {
3711 return true;
3712 }
3713
3714 #ifdef COMPILER1
3715 if (PrintC1Statistics) {
3716 return true;
3717 }
3718 #endif // COMPILER1
3719
3720 #ifdef COMPILER2
3721 if (PrintOptoAssembly || PrintOptoStatistics) {
3722 return true;
3723 }
3724 #endif // COMPILER2
3725
3726 return false;
3727 }
3728
3729 #endif // PRODUCT
3730
3731 jint Arguments::insert_vm_options_file(const JavaVMInitArgs* args,
3732 char** flags_file,
3733 char** vm_options_file,
3734 const int vm_options_file_pos,
3735 ScopedVMInitArgs *vm_options_file_args,
3736 ScopedVMInitArgs* args_out) {
3737 jint code = parse_vm_options_file(*vm_options_file, vm_options_file_args);
3738 if (code != JNI_OK) {
3739 return code;
3740 }
3741
3742 // Now set global settings from the vm_option file, giving an error if
3743 // it has VMOptionsFile in it
3744 code = match_special_option_and_act(vm_options_file_args->get(), flags_file,
3745 NULL, NULL, NULL);
3746 if (code != JNI_OK) {
3747 return code;
3748 }
3749
3750 if (vm_options_file_args->get()->nOptions < 1) {
3751 return 0;
3752 }
3753
3754 return args_out->insert(args, vm_options_file_args->get(),
3755 vm_options_file_pos);
3756 }
3757
3758 jint Arguments::match_special_option_and_act(const JavaVMInitArgs* args,
3759 char ** flags_file,
3760 char ** vm_options_file,
3761 ScopedVMInitArgs* vm_options_file_args,
3762 ScopedVMInitArgs* args_out) {
3763 // Remaining part of option string
3764 const char* tail;
3765 int vm_options_file_pos = -1;
3766
3767 for (int index = 0; index < args->nOptions; index++) {
3768 const JavaVMOption* option = args->options + index;
3769 if (ArgumentsExt::process_options(option)) {
3770 continue;
3771 }
3772 if (match_option(option, "-XX:Flags=", &tail)) {
3773 *flags_file = (char *) tail;
3774 if (*flags_file == NULL) {
3775 jio_fprintf(defaultStream::error_stream(),
3776 "Cannot copy flags_file name.\n");
3777 return JNI_ENOMEM;
3778 }
3779 continue;
3780 }
3781 if (match_option(option, "-XX:VMOptionsFile=", &tail)) {
3782 if (vm_options_file != NULL) {
3783 // The caller accepts -XX:VMOptionsFile
3784 if (*vm_options_file != NULL) {
3785 jio_fprintf(defaultStream::error_stream(),
3786 "Only one VM Options file is supported "
3787 "on the command line\n");
3788 return JNI_EINVAL;
3789 }
3790
3791 *vm_options_file = (char *) tail;
3792 vm_options_file_pos = index; // save position of -XX:VMOptionsFile
3793 if (*vm_options_file == NULL) {
3794 jio_fprintf(defaultStream::error_stream(),
3795 "Cannot copy vm_options_file name.\n");
3796 return JNI_ENOMEM;
3797 }
3798 } else {
3799 jio_fprintf(defaultStream::error_stream(),
3800 "VM options file is only supported on the command line\n");
3801 return JNI_EINVAL;
3802 }
3803 continue;
3804 }
3805 if (match_option(option, "-XX:+PrintVMOptions")) {
3806 PrintVMOptions = true;
3807 continue;
3808 }
3809 if (match_option(option, "-XX:-PrintVMOptions")) {
3810 PrintVMOptions = false;
3811 continue;
3812 }
3813 if (match_option(option, "-XX:+IgnoreUnrecognizedVMOptions")) {
3814 IgnoreUnrecognizedVMOptions = true;
3815 continue;
3816 }
3817 if (match_option(option, "-XX:-IgnoreUnrecognizedVMOptions")) {
3818 IgnoreUnrecognizedVMOptions = false;
3819 continue;
3820 }
3821 if (match_option(option, "-XX:+PrintFlagsInitial")) {
3822 CommandLineFlags::printFlags(tty, false);
3823 vm_exit(0);
3824 }
3825 if (match_option(option, "-XX:NativeMemoryTracking", &tail)) {
3826 #if INCLUDE_NMT
3827 // The launcher did not setup nmt environment variable properly.
3828 if (!MemTracker::check_launcher_nmt_support(tail)) {
3829 warning("Native Memory Tracking did not setup properly, using wrong launcher?");
3830 }
3831
3832 // Verify if nmt option is valid.
3833 if (MemTracker::verify_nmt_option()) {
3834 // Late initialization, still in single-threaded mode.
3835 if (MemTracker::tracking_level() >= NMT_summary) {
3836 MemTracker::init();
3837 }
3838 } else {
3839 vm_exit_during_initialization("Syntax error, expecting -XX:NativeMemoryTracking=[off|summary|detail]", NULL);
3840 }
3841 continue;
3842 #else
3843 jio_fprintf(defaultStream::error_stream(),
3844 "Native Memory Tracking is not supported in this VM\n");
3845 return JNI_ERR;
3846 #endif
3847 }
3848
3849 #ifndef PRODUCT
3850 if (match_option(option, "-XX:+PrintFlagsWithComments")) {
3851 CommandLineFlags::printFlags(tty, true);
3852 vm_exit(0);
3853 }
3854 #endif
3855 }
3856
3857 // If there's a VMOptionsFile, parse that (also can set flags_file)
3858 if ((vm_options_file != NULL) && (*vm_options_file != NULL)) {
3859 return insert_vm_options_file(args, flags_file, vm_options_file,
3860 vm_options_file_pos, vm_options_file_args, args_out);
3861 }
3862 return JNI_OK;
3863 }
3864
3865 static void print_options(const JavaVMInitArgs *args) {
3866 const char* tail;
3867 for (int index = 0; index < args->nOptions; index++) {
3868 const JavaVMOption *option = args->options + index;
3869 if (match_option(option, "-XX:", &tail)) {
3870 logOption(tail);
3871 }
3872 }
3873 }
3874
3875 // Parse entry point called from JNI_CreateJavaVM
3876
3877 jint Arguments::parse(const JavaVMInitArgs* args) {
3878
3879 // Initialize ranges and constraints
3880 CommandLineFlagRangeList::init();
3881 CommandLineFlagConstraintList::init();
3882
3883 // If flag "-XX:Flags=flags-file" is used it will be the first option to be processed.
3884 const char* hotspotrc = ".hotspotrc";
3885 char* flags_file = NULL;
3886 char* vm_options_file = NULL;
3887 bool settings_file_specified = false;
3888 bool needs_hotspotrc_warning = false;
3889 ScopedVMInitArgs java_tool_options_args;
3890 ScopedVMInitArgs java_options_args;
3891 ScopedVMInitArgs modified_cmd_line_args;
3892 // Pass in vm_options_file_args to keep memory for flags_file from being
3893 // deallocated if found in the vm options file.
3894 ScopedVMInitArgs vm_options_file_args;
3895
3896 jint code =
3897 parse_java_tool_options_environment_variable(&java_tool_options_args);
3898 if (code != JNI_OK) {
3899 return code;
3900 }
3901
3902 code = parse_java_options_environment_variable(&java_options_args);
3903 if (code != JNI_OK) {
3904 return code;
3905 }
3906
3907 code = match_special_option_and_act(java_tool_options_args.get(),
3908 &flags_file, NULL, NULL, NULL);
3909 if (code != JNI_OK) {
3910 return code;
3911 }
3912
3913 code = match_special_option_and_act(args, &flags_file, &vm_options_file,
3914 &vm_options_file_args,
3915 &modified_cmd_line_args);
3916 if (code != JNI_OK) {
3917 return code;
3918 }
3919
3920
3921 // The command line arguments have been modified to include VMOptionsFile arguments.
3922 if (modified_cmd_line_args.is_set()) {
3923 args = modified_cmd_line_args.get();
3924 }
3925
3926 code = match_special_option_and_act(java_options_args.get(), &flags_file,
3927 NULL, NULL, NULL);
3928 if (code != JNI_OK) {
3929 return code;
3930 }
3931
3932 settings_file_specified = (flags_file != NULL);
3933
3934 if (IgnoreUnrecognizedVMOptions) {
3935 // uncast const to modify the flag args->ignoreUnrecognized
3936 *(jboolean*)(&args->ignoreUnrecognized) = true;
3937 java_tool_options_args.get()->ignoreUnrecognized = true;
3938 java_options_args.get()->ignoreUnrecognized = true;
3939 }
3940
3941 // Parse specified settings file
3942 if (settings_file_specified) {
3943 if (!process_settings_file(flags_file, true, args->ignoreUnrecognized)) {
3944 return JNI_EINVAL;
3945 }
3946 } else {
3947 #ifdef ASSERT
3948 // Parse default .hotspotrc settings file
3949 if (!process_settings_file(".hotspotrc", false, args->ignoreUnrecognized)) {
3950 return JNI_EINVAL;
3951 }
3952 #else
3953 struct stat buf;
3954 if (os::stat(hotspotrc, &buf) == 0) {
3955 needs_hotspotrc_warning = true;
3956 }
3957 #endif
3958 }
3959
3960 if (PrintVMOptions) {
3961 print_options(java_tool_options_args.get());
3962 print_options(args);
3963 print_options(java_options_args.get());
3964 }
3965
3966 // Parse JavaVMInitArgs structure passed in, as well as JAVA_TOOL_OPTIONS and _JAVA_OPTIONS
3967 jint result = parse_vm_init_args(java_tool_options_args.get(),
3968 java_options_args.get(),
3969 args); // command line arguments
3970
3971 if (result != JNI_OK) {
3972 return result;
3973 }
3974
3975 // Call get_shared_archive_path() here, after possible SharedArchiveFile option got parsed.
3976 SharedArchivePath = get_shared_archive_path();
3977 if (SharedArchivePath == NULL) {
3978 return JNI_ENOMEM;
3979 }
3980
3981 // Set up VerifySharedSpaces
3982 if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) {
3983 VerifySharedSpaces = true;
3984 }
3985
3986 // Delay warning until here so that we've had a chance to process
3987 // the -XX:-PrintWarnings flag
3988 if (needs_hotspotrc_warning) {
3989 warning("%s file is present but has been ignored. "
3990 "Run with -XX:Flags=%s to load the file.",
3991 hotspotrc, hotspotrc);
3992 }
3993
3994 #if defined(_ALLBSD_SOURCE) || defined(AIX) // UseLargePages is not yet supported on BSD and AIX.
3995 UNSUPPORTED_OPTION(UseLargePages, "-XX:+UseLargePages");
3996 #endif
3997
3998 ArgumentsExt::report_unsupported_options();
3999
4000 #ifndef PRODUCT
4001 if (TraceBytecodesAt != 0) {
4002 TraceBytecodes = true;
4003 }
4004 if (CountCompiledCalls) {
4005 if (UseCounterDecay) {
4006 warning("UseCounterDecay disabled because CountCalls is set");
4007 UseCounterDecay = false;
4008 }
4009 }
4010 #endif // PRODUCT
4011
4012 if (ScavengeRootsInCode == 0) {
4013 if (!FLAG_IS_DEFAULT(ScavengeRootsInCode)) {
4014 warning("forcing ScavengeRootsInCode non-zero");
4015 }
4016 ScavengeRootsInCode = 1;
4017 }
4018
4019 if (PrintGCDetails) {
4020 // Turn on -verbose:gc options as well
4021 PrintGC = true;
4022 }
4023
4024 // Set object alignment values.
4025 set_object_alignment();
4026
4027 #if !INCLUDE_ALL_GCS
4028 force_serial_gc();
4029 #endif // INCLUDE_ALL_GCS
4030 #if !INCLUDE_CDS
4031 if (DumpSharedSpaces || RequireSharedSpaces) {
4032 jio_fprintf(defaultStream::error_stream(),
4033 "Shared spaces are not supported in this VM\n");
4034 return JNI_ERR;
4035 }
4036 if ((UseSharedSpaces && FLAG_IS_CMDLINE(UseSharedSpaces)) || PrintSharedSpaces) {
4037 warning("Shared spaces are not supported in this VM");
4038 FLAG_SET_DEFAULT(UseSharedSpaces, false);
4039 FLAG_SET_DEFAULT(PrintSharedSpaces, false);
4040 }
4041 no_shared_spaces("CDS Disabled");
4042 #endif // INCLUDE_CDS
4043
4044 return JNI_OK;
4045 }
4046
4047 jint Arguments::apply_ergo() {
4048
4049 // Set flags based on ergonomics.
4050 set_ergonomics_flags();
4051
4052 set_shared_spaces_flags();
4053
4054 // Check the GC selections again.
4055 if (!check_gc_consistency()) {
4056 return JNI_EINVAL;
4057 }
4058
4059 if (TieredCompilation) {
4060 set_tiered_flags();
4061 } else {
4062 int max_compilation_policy_choice = 1;
4063 #ifdef COMPILER2
4064 max_compilation_policy_choice = 2;
4065 #endif
4066 // Check if the policy is valid.
4067 if (CompilationPolicyChoice >= max_compilation_policy_choice) {
4068 vm_exit_during_initialization(
4069 "Incompatible compilation policy selected", NULL);
4070 }
4071 // Scale CompileThreshold
4072 // CompileThresholdScaling == 0.0 is equivalent to -Xint and leaves CompileThreshold unchanged.
4073 if (!FLAG_IS_DEFAULT(CompileThresholdScaling) && CompileThresholdScaling > 0.0) {
4074 FLAG_SET_ERGO(intx, CompileThreshold, scaled_compile_threshold(CompileThreshold));
4075 }
4076 }
4077
4078 #ifdef COMPILER2
4079 #ifndef PRODUCT
4080 if (PrintIdealGraphLevel > 0) {
4081 FLAG_SET_ERGO(bool, PrintIdealGraph, true);
4082 }
4083 #endif
4084 #endif
4085
4086 // Set heap size based on available physical memory
4087 set_heap_size();
4088
4089 ArgumentsExt::set_gc_specific_flags();
4090
4091 // Initialize Metaspace flags and alignments
4092 Metaspace::ergo_initialize();
4093
4094 // Set bytecode rewriting flags
4095 set_bytecode_flags();
4096
4097 // Set flags if Aggressive optimization flags (-XX:+AggressiveOpts) enabled
4098 jint code = set_aggressive_opts_flags();
4099 if (code != JNI_OK) {
4100 return code;
4101 }
4102
4103 // Turn off biased locking for locking debug mode flags,
4104 // which are subtly different from each other but neither works with
4105 // biased locking
4106 if (UseHeavyMonitors
4107 #ifdef COMPILER1
4108 || !UseFastLocking
4109 #endif // COMPILER1
4110 ) {
4111 if (!FLAG_IS_DEFAULT(UseBiasedLocking) && UseBiasedLocking) {
4112 // flag set to true on command line; warn the user that they
4113 // can't enable biased locking here
4114 warning("Biased Locking is not supported with locking debug flags"
4115 "; ignoring UseBiasedLocking flag." );
4116 }
4117 UseBiasedLocking = false;
4118 }
4119
4120 #ifdef ZERO
4121 // Clear flags not supported on zero.
4122 FLAG_SET_DEFAULT(ProfileInterpreter, false);
4123 FLAG_SET_DEFAULT(UseBiasedLocking, false);
4124 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedOops, false));
4125 LP64_ONLY(FLAG_SET_DEFAULT(UseCompressedClassPointers, false));
4126 #endif // CC_INTERP
4127
4128 #ifdef COMPILER2
4129 if (!EliminateLocks) {
4130 EliminateNestedLocks = false;
4131 }
4132 if (!Inline) {
4133 IncrementalInline = false;
4134 }
4135 #ifndef PRODUCT
4136 if (!IncrementalInline) {
4137 AlwaysIncrementalInline = false;
4138 }
4139 #endif
4140 if (!UseTypeSpeculation && FLAG_IS_DEFAULT(TypeProfileLevel)) {
4141 // nothing to use the profiling, turn if off
4142 FLAG_SET_DEFAULT(TypeProfileLevel, 0);
4143 }
4144 #endif
4145
4146 if (PrintAssembly && FLAG_IS_DEFAULT(DebugNonSafepoints)) {
4147 warning("PrintAssembly is enabled; turning on DebugNonSafepoints to gain additional output");
4148 DebugNonSafepoints = true;
4149 }
4150
4151 if (FLAG_IS_CMDLINE(CompressedClassSpaceSize) && !UseCompressedClassPointers) {
4152 warning("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used");
4153 }
4154
4155 #ifndef PRODUCT
4156 if (!LogVMOutput && FLAG_IS_DEFAULT(LogVMOutput)) {
4157 if (use_vm_log()) {
4158 LogVMOutput = true;
4159 }
4160 }
4161 #endif // PRODUCT
4162
4163 if (PrintCommandLineFlags) {
4164 CommandLineFlags::printSetFlags(tty);
4165 }
4166
4167 // Apply CPU specific policy for the BiasedLocking
4168 if (UseBiasedLocking) {
4169 if (!VM_Version::use_biased_locking() &&
4170 !(FLAG_IS_CMDLINE(UseBiasedLocking))) {
4171 UseBiasedLocking = false;
4172 }
4173 }
4174 #ifdef COMPILER2
4175 if (!UseBiasedLocking || EmitSync != 0) {
4176 UseOptoBiasInlining = false;
4177 }
4178 #endif
4179
4180 return JNI_OK;
4181 }
4182
4183 jint Arguments::adjust_after_os() {
4184 if (UseNUMA) {
4185 if (UseParallelGC || UseParallelOldGC) {
4186 if (FLAG_IS_DEFAULT(MinHeapDeltaBytes)) {
4187 FLAG_SET_DEFAULT(MinHeapDeltaBytes, 64*M);
4188 }
4189 }
4190 // UseNUMAInterleaving is set to ON for all collectors and
4191 // platforms when UseNUMA is set to ON. NUMA-aware collectors
4192 // such as the parallel collector for Linux and Solaris will
4193 // interleave old gen and survivor spaces on top of NUMA
4194 // allocation policy for the eden space.
4195 // Non NUMA-aware collectors such as CMS, G1 and Serial-GC on
4196 // all platforms and ParallelGC on Windows will interleave all
4197 // of the heap spaces across NUMA nodes.
4198 if (FLAG_IS_DEFAULT(UseNUMAInterleaving)) {
4199 FLAG_SET_ERGO(bool, UseNUMAInterleaving, true);
4200 }
4201 }
4202 return JNI_OK;
4203 }
4204
4205 int Arguments::PropertyList_count(SystemProperty* pl) {
4206 int count = 0;
4207 while(pl != NULL) {
4208 count++;
4209 pl = pl->next();
4210 }
4211 return count;
4212 }
4213
4214 const char* Arguments::PropertyList_get_value(SystemProperty *pl, const char* key) {
4215 assert(key != NULL, "just checking");
4216 SystemProperty* prop;
4217 for (prop = pl; prop != NULL; prop = prop->next()) {
4218 if (strcmp(key, prop->key()) == 0) return prop->value();
4219 }
4220 return NULL;
4221 }
4222
4223 const char* Arguments::PropertyList_get_key_at(SystemProperty *pl, int index) {
4224 int count = 0;
4225 const char* ret_val = NULL;
4226
4227 while(pl != NULL) {
4228 if(count >= index) {
4229 ret_val = pl->key();
4230 break;
4231 }
4232 count++;
4233 pl = pl->next();
4234 }
4235
4236 return ret_val;
4237 }
4238
4239 char* Arguments::PropertyList_get_value_at(SystemProperty* pl, int index) {
4240 int count = 0;
4241 char* ret_val = NULL;
4242
4243 while(pl != NULL) {
4244 if(count >= index) {
4245 ret_val = pl->value();
4246 break;
4247 }
4248 count++;
4249 pl = pl->next();
4250 }
4251
4252 return ret_val;
4253 }
4254
4255 void Arguments::PropertyList_add(SystemProperty** plist, SystemProperty *new_p) {
4256 SystemProperty* p = *plist;
4257 if (p == NULL) {
4258 *plist = new_p;
4259 } else {
4260 while (p->next() != NULL) {
4261 p = p->next();
4262 }
4263 p->set_next(new_p);
4264 }
4265 }
4266
4267 void Arguments::PropertyList_add(SystemProperty** plist, const char* k, const char* v) {
4268 if (plist == NULL)
4269 return;
4270
4271 SystemProperty* new_p = new SystemProperty(k, v, true);
4272 PropertyList_add(plist, new_p);
4273 }
4274
4275 void Arguments::PropertyList_add(SystemProperty *element) {
4276 PropertyList_add(&_system_properties, element);
4277 }
4278
4279 // This add maintains unique property key in the list.
4280 void Arguments::PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v, jboolean append) {
4281 if (plist == NULL)
4282 return;
4283
4284 // If property key exist then update with new value.
4285 SystemProperty* prop;
4286 for (prop = *plist; prop != NULL; prop = prop->next()) {
4287 if (strcmp(k, prop->key()) == 0) {
4288 if (append) {
4289 prop->append_value(v);
4290 } else {
4291 prop->set_value(v);
4292 }
4293 return;
4294 }
4295 }
4296
4297 PropertyList_add(plist, k, v);
4298 }
4299
4300 // Copies src into buf, replacing "%%" with "%" and "%p" with pid
4301 // Returns true if all of the source pointed by src has been copied over to
4302 // the destination buffer pointed by buf. Otherwise, returns false.
4303 // Notes:
4304 // 1. If the length (buflen) of the destination buffer excluding the
4305 // NULL terminator character is not long enough for holding the expanded
4306 // pid characters, it also returns false instead of returning the partially
4307 // expanded one.
4308 // 2. The passed in "buflen" should be large enough to hold the null terminator.
4309 bool Arguments::copy_expand_pid(const char* src, size_t srclen,
4310 char* buf, size_t buflen) {
4311 const char* p = src;
4312 char* b = buf;
4313 const char* src_end = &src[srclen];
4314 char* buf_end = &buf[buflen - 1];
4315
4316 while (p < src_end && b < buf_end) {
4317 if (*p == '%') {
4318 switch (*(++p)) {
4319 case '%': // "%%" ==> "%"
4320 *b++ = *p++;
4321 break;
4322 case 'p': { // "%p" ==> current process id
4323 // buf_end points to the character before the last character so
4324 // that we could write '\0' to the end of the buffer.
4325 size_t buf_sz = buf_end - b + 1;
4326 int ret = jio_snprintf(b, buf_sz, "%d", os::current_process_id());
4327
4328 // if jio_snprintf fails or the buffer is not long enough to hold
4329 // the expanded pid, returns false.
4330 if (ret < 0 || ret >= (int)buf_sz) {
4331 return false;
4332 } else {
4333 b += ret;
4334 assert(*b == '\0', "fail in copy_expand_pid");
4335 if (p == src_end && b == buf_end + 1) {
4336 // reach the end of the buffer.
4337 return true;
4338 }
4339 }
4340 p++;
4341 break;
4342 }
4343 default :
4344 *b++ = '%';
4345 }
4346 } else {
4347 *b++ = *p++;
4348 }
4349 }
4350 *b = '\0';
4351 return (p == src_end); // return false if not all of the source was copied
4352 }