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