Thu, 15 Aug 2013 20:04:10 -0400
8003424: Enable Class Data Sharing for CompressedOops
8016729: ObjectAlignmentInBytes=16 now forces the use of heap based compressed oops
8005933: The -Xshare:auto option is ignored for -server
Summary: Move klass metaspace above the heap and support CDS with compressed klass ptrs.
Reviewed-by: coleenp, kvn, mgerdin, tschatzl, stefank
1 /*
2 * Copyright (c) 1997, 2013, 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 */
25 #ifndef SHARE_VM_RUNTIME_ARGUMENTS_HPP
26 #define SHARE_VM_RUNTIME_ARGUMENTS_HPP
28 #include "runtime/java.hpp"
29 #include "runtime/perfData.hpp"
30 #include "utilities/top.hpp"
32 // Arguments parses the command line and recognizes options
34 // Invocation API hook typedefs (these should really be defined in jni.hpp)
35 extern "C" {
36 typedef void (JNICALL *abort_hook_t)(void);
37 typedef void (JNICALL *exit_hook_t)(jint code);
38 typedef jint (JNICALL *vfprintf_hook_t)(FILE *fp, const char *format, va_list args);
39 }
41 // Forward declarations
43 class SysClassPath;
45 // Element describing System and User (-Dkey=value flags) defined property.
47 class SystemProperty: public CHeapObj<mtInternal> {
48 private:
49 char* _key;
50 char* _value;
51 SystemProperty* _next;
52 bool _writeable;
53 bool writeable() { return _writeable; }
55 public:
56 // Accessors
57 const char* key() const { return _key; }
58 char* value() const { return _value; }
59 SystemProperty* next() const { return _next; }
60 void set_next(SystemProperty* next) { _next = next; }
61 bool set_value(char *value) {
62 if (writeable()) {
63 if (_value != NULL) {
64 FreeHeap(_value);
65 }
66 _value = AllocateHeap(strlen(value)+1, mtInternal);
67 if (_value != NULL) {
68 strcpy(_value, value);
69 }
70 return true;
71 }
72 return false;
73 }
75 void append_value(const char *value) {
76 char *sp;
77 size_t len = 0;
78 if (value != NULL) {
79 len = strlen(value);
80 if (_value != NULL) {
81 len += strlen(_value);
82 }
83 sp = AllocateHeap(len+2, mtInternal);
84 if (sp != NULL) {
85 if (_value != NULL) {
86 strcpy(sp, _value);
87 strcat(sp, os::path_separator());
88 strcat(sp, value);
89 FreeHeap(_value);
90 } else {
91 strcpy(sp, value);
92 }
93 _value = sp;
94 }
95 }
96 }
98 // Constructor
99 SystemProperty(const char* key, const char* value, bool writeable) {
100 if (key == NULL) {
101 _key = NULL;
102 } else {
103 _key = AllocateHeap(strlen(key)+1, mtInternal);
104 strcpy(_key, key);
105 }
106 if (value == NULL) {
107 _value = NULL;
108 } else {
109 _value = AllocateHeap(strlen(value)+1, mtInternal);
110 strcpy(_value, value);
111 }
112 _next = NULL;
113 _writeable = writeable;
114 }
115 };
118 // For use by -agentlib, -agentpath and -Xrun
119 class AgentLibrary : public CHeapObj<mtInternal> {
120 friend class AgentLibraryList;
121 private:
122 char* _name;
123 char* _options;
124 void* _os_lib;
125 bool _is_absolute_path;
126 AgentLibrary* _next;
128 public:
129 // Accessors
130 const char* name() const { return _name; }
131 char* options() const { return _options; }
132 bool is_absolute_path() const { return _is_absolute_path; }
133 void* os_lib() const { return _os_lib; }
134 void set_os_lib(void* os_lib) { _os_lib = os_lib; }
135 AgentLibrary* next() const { return _next; }
137 // Constructor
138 AgentLibrary(const char* name, const char* options, bool is_absolute_path, void* os_lib) {
139 _name = AllocateHeap(strlen(name)+1, mtInternal);
140 strcpy(_name, name);
141 if (options == NULL) {
142 _options = NULL;
143 } else {
144 _options = AllocateHeap(strlen(options)+1, mtInternal);
145 strcpy(_options, options);
146 }
147 _is_absolute_path = is_absolute_path;
148 _os_lib = os_lib;
149 _next = NULL;
150 }
151 };
153 // maintain an order of entry list of AgentLibrary
154 class AgentLibraryList VALUE_OBJ_CLASS_SPEC {
155 private:
156 AgentLibrary* _first;
157 AgentLibrary* _last;
158 public:
159 bool is_empty() const { return _first == NULL; }
160 AgentLibrary* first() const { return _first; }
162 // add to the end of the list
163 void add(AgentLibrary* lib) {
164 if (is_empty()) {
165 _first = _last = lib;
166 } else {
167 _last->_next = lib;
168 _last = lib;
169 }
170 lib->_next = NULL;
171 }
173 // search for and remove a library known to be in the list
174 void remove(AgentLibrary* lib) {
175 AgentLibrary* curr;
176 AgentLibrary* prev = NULL;
177 for (curr = first(); curr != NULL; prev = curr, curr = curr->next()) {
178 if (curr == lib) {
179 break;
180 }
181 }
182 assert(curr != NULL, "always should be found");
184 if (curr != NULL) {
185 // it was found, by-pass this library
186 if (prev == NULL) {
187 _first = curr->_next;
188 } else {
189 prev->_next = curr->_next;
190 }
191 if (curr == _last) {
192 _last = prev;
193 }
194 curr->_next = NULL;
195 }
196 }
198 AgentLibraryList() {
199 _first = NULL;
200 _last = NULL;
201 }
202 };
205 class Arguments : AllStatic {
206 friend class VMStructs;
207 friend class JvmtiExport;
208 public:
209 // Operation modi
210 enum Mode {
211 _int, // corresponds to -Xint
212 _mixed, // corresponds to -Xmixed
213 _comp // corresponds to -Xcomp
214 };
216 enum ArgsRange {
217 arg_unreadable = -3,
218 arg_too_small = -2,
219 arg_too_big = -1,
220 arg_in_range = 0
221 };
223 private:
225 // an array containing all flags specified in the .hotspotrc file
226 static char** _jvm_flags_array;
227 static int _num_jvm_flags;
228 // an array containing all jvm arguments specified in the command line
229 static char** _jvm_args_array;
230 static int _num_jvm_args;
231 // string containing all java command (class/jarfile name and app args)
232 static char* _java_command;
234 // Property list
235 static SystemProperty* _system_properties;
237 // Quick accessor to System properties in the list:
238 static SystemProperty *_java_ext_dirs;
239 static SystemProperty *_java_endorsed_dirs;
240 static SystemProperty *_sun_boot_library_path;
241 static SystemProperty *_java_library_path;
242 static SystemProperty *_java_home;
243 static SystemProperty *_java_class_path;
244 static SystemProperty *_sun_boot_class_path;
246 // Meta-index for knowing what packages are in the boot class path
247 static char* _meta_index_path;
248 static char* _meta_index_dir;
250 // java.vendor.url.bug, bug reporting URL for fatal errors.
251 static const char* _java_vendor_url_bug;
253 // sun.java.launcher, private property to provide information about
254 // java/gamma launcher
255 static const char* _sun_java_launcher;
257 // sun.java.launcher.pid, private property
258 static int _sun_java_launcher_pid;
260 // was this VM created by the gamma launcher
261 static bool _created_by_gamma_launcher;
263 // Option flags
264 static bool _has_profile;
265 static const char* _gc_log_filename;
266 static uintx _min_heap_size;
268 // -Xrun arguments
269 static AgentLibraryList _libraryList;
270 static void add_init_library(const char* name, char* options)
271 { _libraryList.add(new AgentLibrary(name, options, false, NULL)); }
273 // -agentlib and -agentpath arguments
274 static AgentLibraryList _agentList;
275 static void add_init_agent(const char* name, char* options, bool absolute_path)
276 { _agentList.add(new AgentLibrary(name, options, absolute_path, NULL)); }
278 // Late-binding agents not started via arguments
279 static void add_loaded_agent(const char* name, char* options, bool absolute_path, void* os_lib)
280 { _agentList.add(new AgentLibrary(name, options, absolute_path, os_lib)); }
282 // Operation modi
283 static Mode _mode;
284 static void set_mode_flags(Mode mode);
285 static bool _java_compiler;
286 static void set_java_compiler(bool arg) { _java_compiler = arg; }
287 static bool java_compiler() { return _java_compiler; }
289 // -Xdebug flag
290 static bool _xdebug_mode;
291 static void set_xdebug_mode(bool arg) { _xdebug_mode = arg; }
292 static bool xdebug_mode() { return _xdebug_mode; }
294 // Used to save default settings
295 static bool _AlwaysCompileLoopMethods;
296 static bool _UseOnStackReplacement;
297 static bool _BackgroundCompilation;
298 static bool _ClipInlining;
299 static bool _CIDynamicCompilePriority;
301 // Tiered
302 static void set_tiered_flags();
303 // CMS/ParNew garbage collectors
304 static void set_parnew_gc_flags();
305 static void set_cms_and_parnew_gc_flags();
306 // UseParallel[Old]GC
307 static void set_parallel_gc_flags();
308 // Garbage-First (UseG1GC)
309 static void set_g1_gc_flags();
310 // GC ergonomics
311 static void set_use_compressed_oops();
312 static void set_use_compressed_klass_ptrs();
313 static void set_ergonomics_flags();
314 static void set_shared_spaces_flags();
315 // limits the given memory size by the maximum amount of memory this process is
316 // currently allowed to allocate or reserve.
317 static julong limit_by_allocatable_memory(julong size);
318 // Setup HeapBaseMinAddress
319 static void set_heap_base_min_address();
320 // Setup heap size
321 static void set_heap_size();
322 // Based on automatic selection criteria, should the
323 // low pause collector be used.
324 static bool should_auto_select_low_pause_collector();
326 // Bytecode rewriting
327 static void set_bytecode_flags();
329 // Invocation API hooks
330 static abort_hook_t _abort_hook;
331 static exit_hook_t _exit_hook;
332 static vfprintf_hook_t _vfprintf_hook;
334 // System properties
335 static bool add_property(const char* prop);
337 // Aggressive optimization flags.
338 static void set_aggressive_opts_flags();
340 // Argument parsing
341 static void do_pd_flag_adjustments();
342 static bool parse_argument(const char* arg, FlagValueOrigin origin);
343 static bool process_argument(const char* arg, jboolean ignore_unrecognized, FlagValueOrigin origin);
344 static void process_java_launcher_argument(const char*, void*);
345 static void process_java_compiler_argument(char* arg);
346 static jint parse_options_environment_variable(const char* name, SysClassPath* scp_p, bool* scp_assembly_required_p);
347 static jint parse_java_tool_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p);
348 static jint parse_java_options_environment_variable(SysClassPath* scp_p, bool* scp_assembly_required_p);
349 static jint parse_vm_init_args(const JavaVMInitArgs* args);
350 static jint parse_each_vm_init_arg(const JavaVMInitArgs* args, SysClassPath* scp_p, bool* scp_assembly_required_p, FlagValueOrigin origin);
351 static jint finalize_vm_init_args(SysClassPath* scp_p, bool scp_assembly_required);
352 static bool is_bad_option(const JavaVMOption* option, jboolean ignore,
353 const char* option_type);
354 static bool is_bad_option(const JavaVMOption* option, jboolean ignore) {
355 return is_bad_option(option, ignore, NULL);
356 }
357 static bool verify_interval(uintx val, uintx min,
358 uintx max, const char* name);
359 static bool verify_min_value(intx val, intx min, const char* name);
360 static bool verify_percentage(uintx value, const char* name);
361 static void describe_range_error(ArgsRange errcode);
362 static ArgsRange check_memory_size(julong size, julong min_size);
363 static ArgsRange parse_memory_size(const char* s, julong* long_arg,
364 julong min_size);
365 // Parse a string for a unsigned integer. Returns true if value
366 // is an unsigned integer greater than or equal to the minimum
367 // parameter passed and returns the value in uintx_arg. Returns
368 // false otherwise, with uintx_arg undefined.
369 static bool parse_uintx(const char* value, uintx* uintx_arg,
370 uintx min_size);
372 // methods to build strings from individual args
373 static void build_jvm_args(const char* arg);
374 static void build_jvm_flags(const char* arg);
375 static void add_string(char*** bldarray, int* count, const char* arg);
376 static const char* build_resource_string(char** args, int count);
378 static bool methodExists(
379 char* className, char* methodName,
380 int classesNum, char** classes, bool* allMethods,
381 int methodsNum, char** methods, bool* allClasses
382 );
384 static void parseOnlyLine(
385 const char* line,
386 short* classesNum, short* classesMax, char*** classes, bool** allMethods,
387 short* methodsNum, short* methodsMax, char*** methods, bool** allClasses
388 );
390 // Returns true if the string s is in the list of flags that have recently
391 // been made obsolete. If we detect one of these flags on the command
392 // line, instead of failing we print a warning message and ignore the
393 // flag. This gives the user a release or so to stop using the flag.
394 static bool is_newly_obsolete(const char* s, JDK_Version* buffer);
396 static short CompileOnlyClassesNum;
397 static short CompileOnlyClassesMax;
398 static char** CompileOnlyClasses;
399 static bool* CompileOnlyAllMethods;
401 static short CompileOnlyMethodsNum;
402 static short CompileOnlyMethodsMax;
403 static char** CompileOnlyMethods;
404 static bool* CompileOnlyAllClasses;
406 static short InterpretOnlyClassesNum;
407 static short InterpretOnlyClassesMax;
408 static char** InterpretOnlyClasses;
409 static bool* InterpretOnlyAllMethods;
411 static bool CheckCompileOnly;
413 static char* SharedArchivePath;
415 public:
416 // Parses the arguments
417 static jint parse(const JavaVMInitArgs* args);
418 // Adjusts the arguments after the OS have adjusted the arguments
419 static jint adjust_after_os();
420 // Check for consistency in the selection of the garbage collector.
421 static bool check_gc_consistency();
422 static void check_deprecated_gcs();
423 static void check_deprecated_gc_flags();
424 // Check consistecy or otherwise of VM argument settings
425 static bool check_vm_args_consistency();
426 // Check stack pages settings
427 static bool check_stack_pages();
428 // Used by os_solaris
429 static bool process_settings_file(const char* file_name, bool should_exist, jboolean ignore_unrecognized);
431 // return a char* array containing all options
432 static char** jvm_flags_array() { return _jvm_flags_array; }
433 static char** jvm_args_array() { return _jvm_args_array; }
434 static int num_jvm_flags() { return _num_jvm_flags; }
435 static int num_jvm_args() { return _num_jvm_args; }
436 // return the arguments passed to the Java application
437 static const char* java_command() { return _java_command; }
439 // print jvm_flags, jvm_args and java_command
440 static void print_on(outputStream* st);
442 // convenient methods to obtain / print jvm_flags and jvm_args
443 static const char* jvm_flags() { return build_resource_string(_jvm_flags_array, _num_jvm_flags); }
444 static const char* jvm_args() { return build_resource_string(_jvm_args_array, _num_jvm_args); }
445 static void print_jvm_flags_on(outputStream* st);
446 static void print_jvm_args_on(outputStream* st);
448 // -Dkey=value flags
449 static SystemProperty* system_properties() { return _system_properties; }
450 static const char* get_property(const char* key);
452 // -Djava.vendor.url.bug
453 static const char* java_vendor_url_bug() { return _java_vendor_url_bug; }
455 // -Dsun.java.launcher
456 static const char* sun_java_launcher() { return _sun_java_launcher; }
457 // Was VM created by a Java launcher?
458 static bool created_by_java_launcher();
459 // Was VM created by the gamma Java launcher?
460 static bool created_by_gamma_launcher();
461 // -Dsun.java.launcher.pid
462 static int sun_java_launcher_pid() { return _sun_java_launcher_pid; }
464 // -Xloggc:<file>, if not specified will be NULL
465 static const char* gc_log_filename() { return _gc_log_filename; }
467 // -Xprof
468 static bool has_profile() { return _has_profile; }
470 // -Xms, -Xmx
471 static uintx min_heap_size() { return _min_heap_size; }
472 static void set_min_heap_size(uintx v) { _min_heap_size = v; }
474 // -Xrun
475 static AgentLibrary* libraries() { return _libraryList.first(); }
476 static bool init_libraries_at_startup() { return !_libraryList.is_empty(); }
477 static void convert_library_to_agent(AgentLibrary* lib)
478 { _libraryList.remove(lib);
479 _agentList.add(lib); }
481 // -agentlib -agentpath
482 static AgentLibrary* agents() { return _agentList.first(); }
483 static bool init_agents_at_startup() { return !_agentList.is_empty(); }
485 // abort, exit, vfprintf hooks
486 static abort_hook_t abort_hook() { return _abort_hook; }
487 static exit_hook_t exit_hook() { return _exit_hook; }
488 static vfprintf_hook_t vfprintf_hook() { return _vfprintf_hook; }
490 static bool GetCheckCompileOnly () { return CheckCompileOnly; }
492 static const char* GetSharedArchivePath() { return SharedArchivePath; }
494 static bool CompileMethod(char* className, char* methodName) {
495 return
496 methodExists(
497 className, methodName,
498 CompileOnlyClassesNum, CompileOnlyClasses, CompileOnlyAllMethods,
499 CompileOnlyMethodsNum, CompileOnlyMethods, CompileOnlyAllClasses
500 );
501 }
503 // Java launcher properties
504 static void process_sun_java_launcher_properties(JavaVMInitArgs* args);
506 // System properties
507 static void init_system_properties();
509 // Update/Initialize System properties after JDK version number is known
510 static void init_version_specific_system_properties();
512 // Property List manipulation
513 static void PropertyList_add(SystemProperty** plist, SystemProperty *element);
514 static void PropertyList_add(SystemProperty** plist, const char* k, char* v);
515 static void PropertyList_unique_add(SystemProperty** plist, const char* k, char* v) {
516 PropertyList_unique_add(plist, k, v, false);
517 }
518 static void PropertyList_unique_add(SystemProperty** plist, const char* k, char* v, jboolean append);
519 static const char* PropertyList_get_value(SystemProperty* plist, const char* key);
520 static int PropertyList_count(SystemProperty* pl);
521 static const char* PropertyList_get_key_at(SystemProperty* pl,int index);
522 static char* PropertyList_get_value_at(SystemProperty* pl,int index);
524 // Miscellaneous System property value getter and setters.
525 static void set_dll_dir(char *value) { _sun_boot_library_path->set_value(value); }
526 static void set_java_home(char *value) { _java_home->set_value(value); }
527 static void set_library_path(char *value) { _java_library_path->set_value(value); }
528 static void set_ext_dirs(char *value) { _java_ext_dirs->set_value(value); }
529 static void set_endorsed_dirs(char *value) { _java_endorsed_dirs->set_value(value); }
530 static void set_sysclasspath(char *value) { _sun_boot_class_path->set_value(value); }
531 static void append_sysclasspath(const char *value) { _sun_boot_class_path->append_value(value); }
532 static void set_meta_index_path(char* meta_index_path, char* meta_index_dir) {
533 _meta_index_path = meta_index_path;
534 _meta_index_dir = meta_index_dir;
535 }
537 static char *get_java_home() { return _java_home->value(); }
538 static char *get_dll_dir() { return _sun_boot_library_path->value(); }
539 static char *get_endorsed_dir() { return _java_endorsed_dirs->value(); }
540 static char *get_sysclasspath() { return _sun_boot_class_path->value(); }
541 static char* get_meta_index_path() { return _meta_index_path; }
542 static char* get_meta_index_dir() { return _meta_index_dir; }
544 // Operation modi
545 static Mode mode() { return _mode; }
547 // Utility: copies src into buf, replacing "%%" with "%" and "%p" with pid.
548 static bool copy_expand_pid(const char* src, size_t srclen, char* buf, size_t buflen);
549 };
551 #endif // SHARE_VM_RUNTIME_ARGUMENTS_HPP