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