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