Mercurial > hg > truffle
annotate src/share/vm/runtime/os.cpp @ 20325:43aa571c1131
8055217: Make jdk8u40 the default jprt release for hs25.40
Reviewed-by: mikael, kvn
author | amurillo |
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date | Fri, 15 Aug 2014 11:39:29 -0700 |
parents | fa62fb12cdca |
children | 833b0f92429a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/classLoader.hpp" | |
27 #include "classfile/javaClasses.hpp" | |
28 #include "classfile/systemDictionary.hpp" | |
29 #include "classfile/vmSymbols.hpp" | |
30 #include "code/icBuffer.hpp" | |
31 #include "code/vtableStubs.hpp" | |
32 #include "gc_implementation/shared/vmGCOperations.hpp" | |
33 #include "interpreter/interpreter.hpp" | |
34 #include "memory/allocation.inline.hpp" | |
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35 #ifdef ASSERT |
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36 #include "memory/guardedMemory.hpp" |
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37 #endif |
1972 | 38 #include "oops/oop.inline.hpp" |
39 #include "prims/jvm.h" | |
40 #include "prims/jvm_misc.hpp" | |
41 #include "prims/privilegedStack.hpp" | |
42 #include "runtime/arguments.hpp" | |
43 #include "runtime/frame.inline.hpp" | |
44 #include "runtime/interfaceSupport.hpp" | |
45 #include "runtime/java.hpp" | |
46 #include "runtime/javaCalls.hpp" | |
47 #include "runtime/mutexLocker.hpp" | |
48 #include "runtime/os.hpp" | |
49 #include "runtime/stubRoutines.hpp" | |
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50 #include "runtime/thread.inline.hpp" |
1972 | 51 #include "services/attachListener.hpp" |
6197 | 52 #include "services/memTracker.hpp" |
1972 | 53 #include "services/threadService.hpp" |
54 #include "utilities/defaultStream.hpp" | |
55 #include "utilities/events.hpp" | |
56 #ifdef TARGET_OS_FAMILY_linux | |
57 # include "os_linux.inline.hpp" | |
58 #endif | |
59 #ifdef TARGET_OS_FAMILY_solaris | |
60 # include "os_solaris.inline.hpp" | |
61 #endif | |
62 #ifdef TARGET_OS_FAMILY_windows | |
63 # include "os_windows.inline.hpp" | |
64 #endif | |
3960 | 65 #ifdef TARGET_OS_FAMILY_bsd |
66 # include "os_bsd.inline.hpp" | |
67 #endif | |
0 | 68 |
69 # include <signal.h> | |
70 | |
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71 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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72 |
0 | 73 OSThread* os::_starting_thread = NULL; |
74 address os::_polling_page = NULL; | |
75 volatile int32_t* os::_mem_serialize_page = NULL; | |
76 uintptr_t os::_serialize_page_mask = 0; | |
77 long os::_rand_seed = 1; | |
78 int os::_processor_count = 0; | |
79 size_t os::_page_sizes[os::page_sizes_max]; | |
80 | |
81 #ifndef PRODUCT | |
2250 | 82 julong os::num_mallocs = 0; // # of calls to malloc/realloc |
83 julong os::alloc_bytes = 0; // # of bytes allocated | |
84 julong os::num_frees = 0; // # of calls to free | |
85 julong os::free_bytes = 0; // # of bytes freed | |
0 | 86 #endif |
87 | |
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88 static juint cur_malloc_words = 0; // current size for MallocMaxTestWords |
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89 |
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90 void os_init_globals() { |
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91 // Called from init_globals(). |
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92 // See Threads::create_vm() in thread.cpp, and init.cpp. |
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93 os::init_globals(); |
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94 } |
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95 |
0 | 96 // Fill in buffer with current local time as an ISO-8601 string. |
97 // E.g., yyyy-mm-ddThh:mm:ss-zzzz. | |
98 // Returns buffer, or NULL if it failed. | |
99 // This would mostly be a call to | |
100 // strftime(...., "%Y-%m-%d" "T" "%H:%M:%S" "%z", ....) | |
101 // except that on Windows the %z behaves badly, so we do it ourselves. | |
102 // Also, people wanted milliseconds on there, | |
103 // and strftime doesn't do milliseconds. | |
104 char* os::iso8601_time(char* buffer, size_t buffer_length) { | |
105 // Output will be of the form "YYYY-MM-DDThh:mm:ss.mmm+zzzz\0" | |
106 // 1 2 | |
107 // 12345678901234567890123456789 | |
108 static const char* iso8601_format = | |
109 "%04d-%02d-%02dT%02d:%02d:%02d.%03d%c%02d%02d"; | |
110 static const size_t needed_buffer = 29; | |
111 | |
112 // Sanity check the arguments | |
113 if (buffer == NULL) { | |
114 assert(false, "NULL buffer"); | |
115 return NULL; | |
116 } | |
117 if (buffer_length < needed_buffer) { | |
118 assert(false, "buffer_length too small"); | |
119 return NULL; | |
120 } | |
121 // Get the current time | |
61 | 122 jlong milliseconds_since_19700101 = javaTimeMillis(); |
0 | 123 const int milliseconds_per_microsecond = 1000; |
124 const time_t seconds_since_19700101 = | |
125 milliseconds_since_19700101 / milliseconds_per_microsecond; | |
126 const int milliseconds_after_second = | |
127 milliseconds_since_19700101 % milliseconds_per_microsecond; | |
128 // Convert the time value to a tm and timezone variable | |
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129 struct tm time_struct; |
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130 if (localtime_pd(&seconds_since_19700101, &time_struct) == NULL) { |
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131 assert(false, "Failed localtime_pd"); |
0 | 132 return NULL; |
133 } | |
3960 | 134 #if defined(_ALLBSD_SOURCE) |
135 const time_t zone = (time_t) time_struct.tm_gmtoff; | |
136 #else | |
0 | 137 const time_t zone = timezone; |
3960 | 138 #endif |
0 | 139 |
140 // If daylight savings time is in effect, | |
141 // we are 1 hour East of our time zone | |
142 const time_t seconds_per_minute = 60; | |
143 const time_t minutes_per_hour = 60; | |
144 const time_t seconds_per_hour = seconds_per_minute * minutes_per_hour; | |
145 time_t UTC_to_local = zone; | |
146 if (time_struct.tm_isdst > 0) { | |
147 UTC_to_local = UTC_to_local - seconds_per_hour; | |
148 } | |
149 // Compute the time zone offset. | |
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150 // localtime_pd() sets timezone to the difference (in seconds) |
0 | 151 // between UTC and and local time. |
152 // ISO 8601 says we need the difference between local time and UTC, | |
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153 // we change the sign of the localtime_pd() result. |
0 | 154 const time_t local_to_UTC = -(UTC_to_local); |
155 // Then we have to figure out if if we are ahead (+) or behind (-) UTC. | |
156 char sign_local_to_UTC = '+'; | |
157 time_t abs_local_to_UTC = local_to_UTC; | |
158 if (local_to_UTC < 0) { | |
159 sign_local_to_UTC = '-'; | |
160 abs_local_to_UTC = -(abs_local_to_UTC); | |
161 } | |
162 // Convert time zone offset seconds to hours and minutes. | |
163 const time_t zone_hours = (abs_local_to_UTC / seconds_per_hour); | |
164 const time_t zone_min = | |
165 ((abs_local_to_UTC % seconds_per_hour) / seconds_per_minute); | |
166 | |
167 // Print an ISO 8601 date and time stamp into the buffer | |
168 const int year = 1900 + time_struct.tm_year; | |
169 const int month = 1 + time_struct.tm_mon; | |
170 const int printed = jio_snprintf(buffer, buffer_length, iso8601_format, | |
171 year, | |
172 month, | |
173 time_struct.tm_mday, | |
174 time_struct.tm_hour, | |
175 time_struct.tm_min, | |
176 time_struct.tm_sec, | |
177 milliseconds_after_second, | |
178 sign_local_to_UTC, | |
179 zone_hours, | |
180 zone_min); | |
181 if (printed == 0) { | |
182 assert(false, "Failed jio_printf"); | |
183 return NULL; | |
184 } | |
185 return buffer; | |
186 } | |
187 | |
188 OSReturn os::set_priority(Thread* thread, ThreadPriority p) { | |
189 #ifdef ASSERT | |
190 if (!(!thread->is_Java_thread() || | |
191 Thread::current() == thread || | |
192 Threads_lock->owned_by_self() | |
193 || thread->is_Compiler_thread() | |
194 )) { | |
195 assert(false, "possibility of dangling Thread pointer"); | |
196 } | |
197 #endif | |
198 | |
199 if (p >= MinPriority && p <= MaxPriority) { | |
200 int priority = java_to_os_priority[p]; | |
201 return set_native_priority(thread, priority); | |
202 } else { | |
203 assert(false, "Should not happen"); | |
204 return OS_ERR; | |
205 } | |
206 } | |
207 | |
6766 | 208 // The mapping from OS priority back to Java priority may be inexact because |
209 // Java priorities can map M:1 with native priorities. If you want the definite | |
210 // Java priority then use JavaThread::java_priority() | |
0 | 211 OSReturn os::get_priority(const Thread* const thread, ThreadPriority& priority) { |
212 int p; | |
213 int os_prio; | |
214 OSReturn ret = get_native_priority(thread, &os_prio); | |
215 if (ret != OS_OK) return ret; | |
216 | |
6766 | 217 if (java_to_os_priority[MaxPriority] > java_to_os_priority[MinPriority]) { |
218 for (p = MaxPriority; p > MinPriority && java_to_os_priority[p] > os_prio; p--) ; | |
219 } else { | |
220 // niceness values are in reverse order | |
221 for (p = MaxPriority; p > MinPriority && java_to_os_priority[p] < os_prio; p--) ; | |
222 } | |
0 | 223 priority = (ThreadPriority)p; |
224 return OS_OK; | |
225 } | |
226 | |
227 | |
228 // --------------------- sun.misc.Signal (optional) --------------------- | |
229 | |
230 | |
231 // SIGBREAK is sent by the keyboard to query the VM state | |
232 #ifndef SIGBREAK | |
233 #define SIGBREAK SIGQUIT | |
234 #endif | |
235 | |
236 // sigexitnum_pd is a platform-specific special signal used for terminating the Signal thread. | |
237 | |
238 | |
239 static void signal_thread_entry(JavaThread* thread, TRAPS) { | |
240 os::set_priority(thread, NearMaxPriority); | |
241 while (true) { | |
242 int sig; | |
243 { | |
244 // FIXME : Currently we have not decieded what should be the status | |
245 // for this java thread blocked here. Once we decide about | |
246 // that we should fix this. | |
247 sig = os::signal_wait(); | |
248 } | |
249 if (sig == os::sigexitnum_pd()) { | |
250 // Terminate the signal thread | |
251 return; | |
252 } | |
253 | |
254 switch (sig) { | |
255 case SIGBREAK: { | |
256 // Check if the signal is a trigger to start the Attach Listener - in that | |
257 // case don't print stack traces. | |
258 if (!DisableAttachMechanism && AttachListener::is_init_trigger()) { | |
259 continue; | |
260 } | |
261 // Print stack traces | |
262 // Any SIGBREAK operations added here should make sure to flush | |
263 // the output stream (e.g. tty->flush()) after output. See 4803766. | |
264 // Each module also prints an extra carriage return after its output. | |
265 VM_PrintThreads op; | |
266 VMThread::execute(&op); | |
267 VM_PrintJNI jni_op; | |
268 VMThread::execute(&jni_op); | |
269 VM_FindDeadlocks op1(tty); | |
270 VMThread::execute(&op1); | |
271 Universe::print_heap_at_SIGBREAK(); | |
272 if (PrintClassHistogram) { | |
10405 | 273 VM_GC_HeapInspection op1(gclog_or_tty, true /* force full GC before heap inspection */); |
0 | 274 VMThread::execute(&op1); |
275 } | |
276 if (JvmtiExport::should_post_data_dump()) { | |
277 JvmtiExport::post_data_dump(); | |
278 } | |
279 break; | |
280 } | |
281 default: { | |
282 // Dispatch the signal to java | |
283 HandleMark hm(THREAD); | |
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284 Klass* k = SystemDictionary::resolve_or_null(vmSymbols::sun_misc_Signal(), THREAD); |
0 | 285 KlassHandle klass (THREAD, k); |
286 if (klass.not_null()) { | |
287 JavaValue result(T_VOID); | |
288 JavaCallArguments args; | |
289 args.push_int(sig); | |
290 JavaCalls::call_static( | |
291 &result, | |
292 klass, | |
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293 vmSymbols::dispatch_name(), |
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294 vmSymbols::int_void_signature(), |
0 | 295 &args, |
296 THREAD | |
297 ); | |
298 } | |
299 if (HAS_PENDING_EXCEPTION) { | |
300 // tty is initialized early so we don't expect it to be null, but | |
301 // if it is we can't risk doing an initialization that might | |
302 // trigger additional out-of-memory conditions | |
303 if (tty != NULL) { | |
304 char klass_name[256]; | |
305 char tmp_sig_name[16]; | |
306 const char* sig_name = "UNKNOWN"; | |
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307 InstanceKlass::cast(PENDING_EXCEPTION->klass())-> |
0 | 308 name()->as_klass_external_name(klass_name, 256); |
309 if (os::exception_name(sig, tmp_sig_name, 16) != NULL) | |
310 sig_name = tmp_sig_name; | |
311 warning("Exception %s occurred dispatching signal %s to handler" | |
312 "- the VM may need to be forcibly terminated", | |
313 klass_name, sig_name ); | |
314 } | |
315 CLEAR_PENDING_EXCEPTION; | |
316 } | |
317 } | |
318 } | |
319 } | |
320 } | |
321 | |
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322 void os::init_before_ergo() { |
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323 // We need to initialize large page support here because ergonomics takes some |
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324 // decisions depending on large page support and the calculated large page size. |
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325 large_page_init(); |
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326 } |
0 | 327 |
328 void os::signal_init() { | |
329 if (!ReduceSignalUsage) { | |
330 // Setup JavaThread for processing signals | |
331 EXCEPTION_MARK; | |
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332 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK); |
0 | 333 instanceKlassHandle klass (THREAD, k); |
334 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK); | |
335 | |
336 const char thread_name[] = "Signal Dispatcher"; | |
337 Handle string = java_lang_String::create_from_str(thread_name, CHECK); | |
338 | |
339 // Initialize thread_oop to put it into the system threadGroup | |
340 Handle thread_group (THREAD, Universe::system_thread_group()); | |
341 JavaValue result(T_VOID); | |
342 JavaCalls::call_special(&result, thread_oop, | |
343 klass, | |
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344 vmSymbols::object_initializer_name(), |
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345 vmSymbols::threadgroup_string_void_signature(), |
0 | 346 thread_group, |
347 string, | |
348 CHECK); | |
349 | |
1142 | 350 KlassHandle group(THREAD, SystemDictionary::ThreadGroup_klass()); |
0 | 351 JavaCalls::call_special(&result, |
352 thread_group, | |
353 group, | |
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354 vmSymbols::add_method_name(), |
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355 vmSymbols::thread_void_signature(), |
0 | 356 thread_oop, // ARG 1 |
357 CHECK); | |
358 | |
359 os::signal_init_pd(); | |
360 | |
361 { MutexLocker mu(Threads_lock); | |
362 JavaThread* signal_thread = new JavaThread(&signal_thread_entry); | |
363 | |
364 // At this point it may be possible that no osthread was created for the | |
365 // JavaThread due to lack of memory. We would have to throw an exception | |
366 // in that case. However, since this must work and we do not allow | |
367 // exceptions anyway, check and abort if this fails. | |
368 if (signal_thread == NULL || signal_thread->osthread() == NULL) { | |
369 vm_exit_during_initialization("java.lang.OutOfMemoryError", | |
370 "unable to create new native thread"); | |
371 } | |
372 | |
373 java_lang_Thread::set_thread(thread_oop(), signal_thread); | |
374 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority); | |
375 java_lang_Thread::set_daemon(thread_oop()); | |
376 | |
377 signal_thread->set_threadObj(thread_oop()); | |
378 Threads::add(signal_thread); | |
379 Thread::start(signal_thread); | |
380 } | |
381 // Handle ^BREAK | |
382 os::signal(SIGBREAK, os::user_handler()); | |
383 } | |
384 } | |
385 | |
386 | |
387 void os::terminate_signal_thread() { | |
388 if (!ReduceSignalUsage) | |
389 signal_notify(sigexitnum_pd()); | |
390 } | |
391 | |
392 | |
393 // --------------------- loading libraries --------------------- | |
394 | |
395 typedef jint (JNICALL *JNI_OnLoad_t)(JavaVM *, void *); | |
396 extern struct JavaVM_ main_vm; | |
397 | |
398 static void* _native_java_library = NULL; | |
399 | |
400 void* os::native_java_library() { | |
401 if (_native_java_library == NULL) { | |
402 char buffer[JVM_MAXPATHLEN]; | |
403 char ebuf[1024]; | |
404 | |
242 | 405 // Try to load verify dll first. In 1.3 java dll depends on it and is not |
406 // always able to find it when the loading executable is outside the JDK. | |
0 | 407 // In order to keep working with 1.2 we ignore any loading errors. |
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408 if (dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(), |
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409 "verify")) { |
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410 dll_load(buffer, ebuf, sizeof(ebuf)); |
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411 } |
0 | 412 |
413 // Load java dll | |
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414 if (dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(), |
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415 "java")) { |
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416 _native_java_library = dll_load(buffer, ebuf, sizeof(ebuf)); |
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417 } |
0 | 418 if (_native_java_library == NULL) { |
419 vm_exit_during_initialization("Unable to load native library", ebuf); | |
420 } | |
3960 | 421 |
422 #if defined(__OpenBSD__) | |
423 // Work-around OpenBSD's lack of $ORIGIN support by pre-loading libnet.so | |
424 // ignore errors | |
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425 if (dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(), |
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426 "net")) { |
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427 dll_load(buffer, ebuf, sizeof(ebuf)); |
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428 } |
3960 | 429 #endif |
242 | 430 } |
431 static jboolean onLoaded = JNI_FALSE; | |
432 if (onLoaded) { | |
433 // We may have to wait to fire OnLoad until TLS is initialized. | |
434 if (ThreadLocalStorage::is_initialized()) { | |
435 // The JNI_OnLoad handling is normally done by method load in | |
436 // java.lang.ClassLoader$NativeLibrary, but the VM loads the base library | |
437 // explicitly so we have to check for JNI_OnLoad as well | |
438 const char *onLoadSymbols[] = JNI_ONLOAD_SYMBOLS; | |
439 JNI_OnLoad_t JNI_OnLoad = CAST_TO_FN_PTR( | |
440 JNI_OnLoad_t, dll_lookup(_native_java_library, onLoadSymbols[0])); | |
441 if (JNI_OnLoad != NULL) { | |
442 JavaThread* thread = JavaThread::current(); | |
443 ThreadToNativeFromVM ttn(thread); | |
444 HandleMark hm(thread); | |
445 jint ver = (*JNI_OnLoad)(&main_vm, NULL); | |
446 onLoaded = JNI_TRUE; | |
447 if (!Threads::is_supported_jni_version_including_1_1(ver)) { | |
448 vm_exit_during_initialization("Unsupported JNI version"); | |
449 } | |
0 | 450 } |
451 } | |
452 } | |
453 return _native_java_library; | |
454 } | |
455 | |
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456 /* |
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457 * Support for finding Agent_On(Un)Load/Attach<_lib_name> if it exists. |
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458 * If check_lib == true then we are looking for an |
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459 * Agent_OnLoad_lib_name or Agent_OnAttach_lib_name function to determine if |
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460 * this library is statically linked into the image. |
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461 * If check_lib == false then we will look for the appropriate symbol in the |
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462 * executable if agent_lib->is_static_lib() == true or in the shared library |
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463 * referenced by 'handle'. |
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464 */ |
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465 void* os::find_agent_function(AgentLibrary *agent_lib, bool check_lib, |
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466 const char *syms[], size_t syms_len) { |
12220 | 467 assert(agent_lib != NULL, "sanity check"); |
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468 const char *lib_name; |
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469 void *handle = agent_lib->os_lib(); |
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470 void *entryName = NULL; |
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471 char *agent_function_name; |
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472 size_t i; |
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473 |
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474 // If checking then use the agent name otherwise test is_static_lib() to |
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475 // see how to process this lookup |
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476 lib_name = ((check_lib || agent_lib->is_static_lib()) ? agent_lib->name() : NULL); |
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477 for (i = 0; i < syms_len; i++) { |
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478 agent_function_name = build_agent_function_name(syms[i], lib_name, agent_lib->is_absolute_path()); |
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479 if (agent_function_name == NULL) { |
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480 break; |
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481 } |
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482 entryName = dll_lookup(handle, agent_function_name); |
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483 FREE_C_HEAP_ARRAY(char, agent_function_name, mtThread); |
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484 if (entryName != NULL) { |
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485 break; |
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486 } |
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487 } |
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488 return entryName; |
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489 } |
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490 |
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491 // See if the passed in agent is statically linked into the VM image. |
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492 bool os::find_builtin_agent(AgentLibrary *agent_lib, const char *syms[], |
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493 size_t syms_len) { |
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494 void *ret; |
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495 void *proc_handle; |
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496 void *save_handle; |
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497 |
12220 | 498 assert(agent_lib != NULL, "sanity check"); |
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499 if (agent_lib->name() == NULL) { |
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500 return false; |
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501 } |
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502 proc_handle = get_default_process_handle(); |
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503 // Check for Agent_OnLoad/Attach_lib_name function |
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504 save_handle = agent_lib->os_lib(); |
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505 // We want to look in this process' symbol table. |
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506 agent_lib->set_os_lib(proc_handle); |
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507 ret = find_agent_function(agent_lib, true, syms, syms_len); |
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508 if (ret != NULL) { |
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509 // Found an entry point like Agent_OnLoad_lib_name so we have a static agent |
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510 agent_lib->set_valid(); |
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511 agent_lib->set_static_lib(true); |
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512 return true; |
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513 } |
12220 | 514 agent_lib->set_os_lib(save_handle); |
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515 return false; |
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516 } |
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517 |
0 | 518 // --------------------- heap allocation utilities --------------------- |
519 | |
6197 | 520 char *os::strdup(const char *str, MEMFLAGS flags) { |
0 | 521 size_t size = strlen(str); |
6197 | 522 char *dup_str = (char *)malloc(size + 1, flags); |
0 | 523 if (dup_str == NULL) return NULL; |
524 strcpy(dup_str, str); | |
525 return dup_str; | |
526 } | |
527 | |
528 | |
529 | |
530 #define paranoid 0 /* only set to 1 if you suspect checking code has bug */ | |
531 | |
532 #ifdef ASSERT | |
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533 static void verify_memory(void* ptr) { |
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534 GuardedMemory guarded(ptr); |
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535 if (!guarded.verify_guards()) { |
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536 tty->print_cr("## nof_mallocs = " UINT64_FORMAT ", nof_frees = " UINT64_FORMAT, os::num_mallocs, os::num_frees); |
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537 tty->print_cr("## memory stomp:"); |
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538 guarded.print_on(tty); |
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539 fatal("memory stomping error"); |
0 | 540 } |
541 } | |
542 #endif | |
543 | |
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544 // |
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545 // This function supports testing of the malloc out of memory |
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546 // condition without really running the system out of memory. |
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547 // |
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548 static u_char* testMalloc(size_t alloc_size) { |
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549 assert(MallocMaxTestWords > 0, "sanity check"); |
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550 |
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551 if ((cur_malloc_words + (alloc_size / BytesPerWord)) > MallocMaxTestWords) { |
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552 return NULL; |
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553 } |
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554 |
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555 u_char* ptr = (u_char*)::malloc(alloc_size); |
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556 |
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557 if (ptr != NULL) { |
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558 Atomic::add(((jint) (alloc_size / BytesPerWord)), |
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559 (volatile jint *) &cur_malloc_words); |
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560 } |
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561 return ptr; |
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562 } |
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563 |
6197 | 564 void* os::malloc(size_t size, MEMFLAGS memflags, address caller) { |
2250 | 565 NOT_PRODUCT(inc_stat_counter(&num_mallocs, 1)); |
566 NOT_PRODUCT(inc_stat_counter(&alloc_bytes, size)); | |
0 | 567 |
11151 | 568 #ifdef ASSERT |
569 // checking for the WatcherThread and crash_protection first | |
570 // since os::malloc can be called when the libjvm.{dll,so} is | |
571 // first loaded and we don't have a thread yet. | |
572 // try to find the thread after we see that the watcher thread | |
573 // exists and has crash protection. | |
574 WatcherThread *wt = WatcherThread::watcher_thread(); | |
575 if (wt != NULL && wt->has_crash_protection()) { | |
576 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
577 if (thread == wt) { | |
578 assert(!wt->has_crash_protection(), | |
579 "Can't malloc with crash protection from WatcherThread"); | |
580 } | |
581 } | |
582 #endif | |
583 | |
0 | 584 if (size == 0) { |
585 // return a valid pointer if size is zero | |
586 // if NULL is returned the calling functions assume out of memory. | |
587 size = 1; | |
588 } | |
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589 |
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590 #ifndef ASSERT |
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591 const size_t alloc_size = size; |
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592 #else |
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593 const size_t alloc_size = GuardedMemory::get_total_size(size); |
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594 if (size > alloc_size) { // Check for rollover. |
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595 return NULL; |
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596 } |
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597 #endif |
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598 |
0 | 599 NOT_PRODUCT(if (MallocVerifyInterval > 0) check_heap()); |
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600 |
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601 u_char* ptr; |
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602 if (MallocMaxTestWords > 0) { |
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603 ptr = testMalloc(alloc_size); |
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604 } else { |
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605 ptr = (u_char*)::malloc(alloc_size); |
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606 } |
6197 | 607 |
0 | 608 #ifdef ASSERT |
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609 if (ptr == NULL) { |
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610 return NULL; |
0 | 611 } |
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612 // Wrap memory with guard |
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613 GuardedMemory guarded(ptr, size); |
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614 ptr = guarded.get_user_ptr(); |
0 | 615 #endif |
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616 if ((intptr_t)ptr == (intptr_t)MallocCatchPtr) { |
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617 tty->print_cr("os::malloc caught, " SIZE_FORMAT " bytes --> " PTR_FORMAT, size, ptr); |
0 | 618 breakpoint(); |
619 } | |
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620 debug_only(if (paranoid) verify_memory(ptr)); |
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621 if (PrintMalloc && tty != NULL) { |
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622 tty->print_cr("os::malloc " SIZE_FORMAT " bytes --> " PTR_FORMAT, size, ptr); |
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623 } |
6197 | 624 |
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625 // we do not track guard memory |
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626 MemTracker::record_malloc((address)ptr, size, memflags, caller == 0 ? CALLER_PC : caller); |
6197 | 627 |
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628 return ptr; |
0 | 629 } |
630 | |
631 | |
6197 | 632 void* os::realloc(void *memblock, size_t size, MEMFLAGS memflags, address caller) { |
0 | 633 #ifndef ASSERT |
2250 | 634 NOT_PRODUCT(inc_stat_counter(&num_mallocs, 1)); |
635 NOT_PRODUCT(inc_stat_counter(&alloc_bytes, size)); | |
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636 MemTracker::Tracker tkr = MemTracker::get_realloc_tracker(); |
6197 | 637 void* ptr = ::realloc(memblock, size); |
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638 if (ptr != NULL) { |
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639 tkr.record((address)memblock, (address)ptr, size, memflags, |
6197 | 640 caller == 0 ? CALLER_PC : caller); |
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641 } else { |
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642 tkr.discard(); |
6197 | 643 } |
644 return ptr; | |
0 | 645 #else |
646 if (memblock == NULL) { | |
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647 return os::malloc(size, memflags, (caller == 0 ? CALLER_PC : caller)); |
0 | 648 } |
649 if ((intptr_t)memblock == (intptr_t)MallocCatchPtr) { | |
2250 | 650 tty->print_cr("os::realloc caught " PTR_FORMAT, memblock); |
0 | 651 breakpoint(); |
652 } | |
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653 verify_memory(memblock); |
0 | 654 NOT_PRODUCT(if (MallocVerifyInterval > 0) check_heap()); |
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655 if (size == 0) { |
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656 return NULL; |
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657 } |
0 | 658 // always move the block |
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659 void* ptr = os::malloc(size, memflags, caller == 0 ? CALLER_PC : caller); |
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660 if (PrintMalloc) { |
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661 tty->print_cr("os::remalloc " SIZE_FORMAT " bytes, " PTR_FORMAT " --> " PTR_FORMAT, size, memblock, ptr); |
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662 } |
0 | 663 // Copy to new memory if malloc didn't fail |
664 if ( ptr != NULL ) { | |
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665 GuardedMemory guarded(memblock); |
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666 memcpy(ptr, memblock, MIN2(size, guarded.get_user_size())); |
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667 if (paranoid) verify_memory(ptr); |
0 | 668 if ((intptr_t)ptr == (intptr_t)MallocCatchPtr) { |
2250 | 669 tty->print_cr("os::realloc caught, " SIZE_FORMAT " bytes --> " PTR_FORMAT, size, ptr); |
0 | 670 breakpoint(); |
671 } | |
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672 os::free(memblock); |
0 | 673 } |
674 return ptr; | |
675 #endif | |
676 } | |
677 | |
678 | |
6197 | 679 void os::free(void *memblock, MEMFLAGS memflags) { |
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680 address trackp = (address) memblock; |
2250 | 681 NOT_PRODUCT(inc_stat_counter(&num_frees, 1)); |
0 | 682 #ifdef ASSERT |
683 if (memblock == NULL) return; | |
684 if ((intptr_t)memblock == (intptr_t)MallocCatchPtr) { | |
2250 | 685 if (tty != NULL) tty->print_cr("os::free caught " PTR_FORMAT, memblock); |
0 | 686 breakpoint(); |
687 } | |
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688 verify_memory(memblock); |
0 | 689 NOT_PRODUCT(if (MallocVerifyInterval > 0) check_heap()); |
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690 |
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691 GuardedMemory guarded(memblock); |
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692 size_t size = guarded.get_user_size(); |
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693 inc_stat_counter(&free_bytes, size); |
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694 memblock = guarded.release_for_freeing(); |
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695 if (PrintMalloc && tty != NULL) { |
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696 fprintf(stderr, "os::free " SIZE_FORMAT " bytes --> " PTR_FORMAT "\n", size, (uintptr_t)memblock); |
0 | 697 } |
698 #endif | |
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699 MemTracker::record_free(trackp, memflags); |
6197 | 700 |
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701 ::free(memblock); |
0 | 702 } |
703 | |
704 void os::init_random(long initval) { | |
705 _rand_seed = initval; | |
706 } | |
707 | |
708 | |
709 long os::random() { | |
710 /* standard, well-known linear congruential random generator with | |
711 * next_rand = (16807*seed) mod (2**31-1) | |
712 * see | |
713 * (1) "Random Number Generators: Good Ones Are Hard to Find", | |
714 * S.K. Park and K.W. Miller, Communications of the ACM 31:10 (Oct 1988), | |
715 * (2) "Two Fast Implementations of the 'Minimal Standard' Random | |
716 * Number Generator", David G. Carta, Comm. ACM 33, 1 (Jan 1990), pp. 87-88. | |
717 */ | |
718 const long a = 16807; | |
719 const unsigned long m = 2147483647; | |
720 const long q = m / a; assert(q == 127773, "weird math"); | |
721 const long r = m % a; assert(r == 2836, "weird math"); | |
722 | |
723 // compute az=2^31p+q | |
724 unsigned long lo = a * (long)(_rand_seed & 0xFFFF); | |
725 unsigned long hi = a * (long)((unsigned long)_rand_seed >> 16); | |
726 lo += (hi & 0x7FFF) << 16; | |
727 | |
728 // if q overflowed, ignore the overflow and increment q | |
729 if (lo > m) { | |
730 lo &= m; | |
731 ++lo; | |
732 } | |
733 lo += hi >> 15; | |
734 | |
735 // if (p+q) overflowed, ignore the overflow and increment (p+q) | |
736 if (lo > m) { | |
737 lo &= m; | |
738 ++lo; | |
739 } | |
740 return (_rand_seed = lo); | |
741 } | |
742 | |
743 // The INITIALIZED state is distinguished from the SUSPENDED state because the | |
744 // conditions in which a thread is first started are different from those in which | |
745 // a suspension is resumed. These differences make it hard for us to apply the | |
746 // tougher checks when starting threads that we want to do when resuming them. | |
747 // However, when start_thread is called as a result of Thread.start, on a Java | |
748 // thread, the operation is synchronized on the Java Thread object. So there | |
749 // cannot be a race to start the thread and hence for the thread to exit while | |
750 // we are working on it. Non-Java threads that start Java threads either have | |
751 // to do so in a context in which races are impossible, or should do appropriate | |
752 // locking. | |
753 | |
754 void os::start_thread(Thread* thread) { | |
755 // guard suspend/resume | |
756 MutexLockerEx ml(thread->SR_lock(), Mutex::_no_safepoint_check_flag); | |
757 OSThread* osthread = thread->osthread(); | |
758 osthread->set_state(RUNNABLE); | |
759 pd_start_thread(thread); | |
760 } | |
761 | |
762 //--------------------------------------------------------------------------- | |
763 // Helper functions for fatal error handler | |
764 | |
765 void os::print_hex_dump(outputStream* st, address start, address end, int unitsize) { | |
766 assert(unitsize == 1 || unitsize == 2 || unitsize == 4 || unitsize == 8, "just checking"); | |
767 | |
768 int cols = 0; | |
769 int cols_per_line = 0; | |
770 switch (unitsize) { | |
771 case 1: cols_per_line = 16; break; | |
772 case 2: cols_per_line = 8; break; | |
773 case 4: cols_per_line = 4; break; | |
774 case 8: cols_per_line = 2; break; | |
775 default: return; | |
776 } | |
777 | |
778 address p = start; | |
779 st->print(PTR_FORMAT ": ", start); | |
780 while (p < end) { | |
781 switch (unitsize) { | |
782 case 1: st->print("%02x", *(u1*)p); break; | |
783 case 2: st->print("%04x", *(u2*)p); break; | |
784 case 4: st->print("%08x", *(u4*)p); break; | |
785 case 8: st->print("%016" FORMAT64_MODIFIER "x", *(u8*)p); break; | |
786 } | |
787 p += unitsize; | |
788 cols++; | |
789 if (cols >= cols_per_line && p < end) { | |
790 cols = 0; | |
791 st->cr(); | |
792 st->print(PTR_FORMAT ": ", p); | |
793 } else { | |
794 st->print(" "); | |
795 } | |
796 } | |
797 st->cr(); | |
798 } | |
799 | |
800 void os::print_environment_variables(outputStream* st, const char** env_list, | |
801 char* buffer, int len) { | |
802 if (env_list) { | |
803 st->print_cr("Environment Variables:"); | |
804 | |
805 for (int i = 0; env_list[i] != NULL; i++) { | |
806 if (getenv(env_list[i], buffer, len)) { | |
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807 st->print("%s", env_list[i]); |
0 | 808 st->print("="); |
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809 st->print_cr("%s", buffer); |
0 | 810 } |
811 } | |
812 } | |
813 } | |
814 | |
815 void os::print_cpu_info(outputStream* st) { | |
816 // cpu | |
817 st->print("CPU:"); | |
818 st->print("total %d", os::processor_count()); | |
819 // It's not safe to query number of active processors after crash | |
820 // st->print("(active %d)", os::active_processor_count()); | |
821 st->print(" %s", VM_Version::cpu_features()); | |
822 st->cr(); | |
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823 pd_print_cpu_info(st); |
0 | 824 } |
825 | |
826 void os::print_date_and_time(outputStream *st) { | |
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827 const int secs_per_day = 86400; |
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828 const int secs_per_hour = 3600; |
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829 const int secs_per_min = 60; |
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830 |
0 | 831 time_t tloc; |
832 (void)time(&tloc); | |
833 st->print("time: %s", ctime(&tloc)); // ctime adds newline. | |
834 | |
835 double t = os::elapsedTime(); | |
836 // NOTE: It tends to crash after a SEGV if we want to printf("%f",...) in | |
837 // Linux. Must be a bug in glibc ? Workaround is to round "t" to int | |
838 // before printf. We lost some precision, but who cares? | |
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839 int eltime = (int)t; // elapsed time in seconds |
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840 |
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841 // print elapsed time in a human-readable format: |
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842 int eldays = eltime / secs_per_day; |
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843 int day_secs = eldays * secs_per_day; |
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844 int elhours = (eltime - day_secs) / secs_per_hour; |
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845 int hour_secs = elhours * secs_per_hour; |
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846 int elmins = (eltime - day_secs - hour_secs) / secs_per_min; |
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847 int minute_secs = elmins * secs_per_min; |
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848 int elsecs = (eltime - day_secs - hour_secs - minute_secs); |
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849 st->print_cr("elapsed time: %d seconds (%dd %dh %dm %ds)", eltime, eldays, elhours, elmins, elsecs); |
0 | 850 } |
851 | |
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852 // moved from debug.cpp (used to be find()) but still called from there |
1907 | 853 // The verbose parameter is only set by the debug code in one case |
854 void os::print_location(outputStream* st, intptr_t x, bool verbose) { | |
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855 address addr = (address)x; |
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856 CodeBlob* b = CodeCache::find_blob_unsafe(addr); |
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857 if (b != NULL) { |
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858 if (b->is_buffer_blob()) { |
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859 // the interpreter is generated into a buffer blob |
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6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
860 InterpreterCodelet* i = Interpreter::codelet_containing(addr); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
861 if (i != NULL) { |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
862 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in an Interpreter codelet", addr, (int)(addr - i->code_begin())); |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
863 i->print_on(st); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
864 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
865 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
866 if (Interpreter::contains(addr)) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
867 st->print_cr(INTPTR_FORMAT " is pointing into interpreter code" |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
868 " (not bytecode specific)", addr); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
869 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
870 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
871 // |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
872 if (AdapterHandlerLibrary::contains(b)) { |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
873 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in an AdapterHandler", addr, (int)(addr - b->code_begin())); |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
874 AdapterHandlerLibrary::print_handler_on(st, b); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
875 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
876 // the stubroutines are generated into a buffer blob |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
877 StubCodeDesc* d = StubCodeDesc::desc_for(addr); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
878 if (d != NULL) { |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
879 st->print_cr(INTPTR_FORMAT " is at begin+%d in a stub", addr, (int)(addr - d->begin())); |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
880 d->print_on(st); |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
881 st->cr(); |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
882 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
883 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
884 if (StubRoutines::contains(addr)) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
885 st->print_cr(INTPTR_FORMAT " is pointing to an (unnamed) " |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
886 "stub routine", addr); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
887 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
888 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
889 // the InlineCacheBuffer is using stubs generated into a buffer blob |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
890 if (InlineCacheBuffer::contains(addr)) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
891 st->print_cr(INTPTR_FORMAT " is pointing into InlineCacheBuffer", addr); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
892 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
893 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
894 VtableStub* v = VtableStubs::stub_containing(addr); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
895 if (v != NULL) { |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
896 st->print_cr(INTPTR_FORMAT " is at entry_point+%d in a vtable stub", addr, (int)(addr - v->entry_point())); |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
897 v->print_on(st); |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
898 st->cr(); |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
899 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
900 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
901 } |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
902 nmethod* nm = b->as_nmethod_or_null(); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
903 if (nm != NULL) { |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
904 ResourceMark rm; |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
905 st->print(INTPTR_FORMAT " is at entry_point+%d in (nmethod*)" INTPTR_FORMAT, |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
906 addr, (int)(addr - nm->entry_point()), nm); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
907 if (verbose) { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
908 st->print(" for "); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
909 nm->method()->print_value_on(st); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
910 } |
6816
87ac5c0a404d
8000228: Missing call to cr() when printing entry_point in nmethod, in os::print_location
stefank
parents:
6814
diff
changeset
|
911 st->cr(); |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
912 nm->print_nmethod(verbose); |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
913 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
914 } |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
915 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in ", addr, (int)(addr - b->code_begin())); |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
916 b->print_on(st); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
917 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
918 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
919 |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
920 if (Universe::heap()->is_in(addr)) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
921 HeapWord* p = Universe::heap()->block_start(addr); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
922 bool print = false; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
923 // If we couldn't find it it just may mean that heap wasn't parseable |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
924 // See if we were just given an oop directly |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
925 if (p != NULL && Universe::heap()->block_is_obj(p)) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
926 print = true; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
927 } else if (p == NULL && ((oopDesc*)addr)->is_oop()) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
928 p = (HeapWord*) addr; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
929 print = true; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
930 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
931 if (print) { |
6814
85f1cded9793
8000230: Change os::print_location to be more descriptive when a location is pointing into an object
stefank
parents:
6766
diff
changeset
|
932 if (p == (HeapWord*) addr) { |
85f1cded9793
8000230: Change os::print_location to be more descriptive when a location is pointing into an object
stefank
parents:
6766
diff
changeset
|
933 st->print_cr(INTPTR_FORMAT " is an oop", addr); |
85f1cded9793
8000230: Change os::print_location to be more descriptive when a location is pointing into an object
stefank
parents:
6766
diff
changeset
|
934 } else { |
85f1cded9793
8000230: Change os::print_location to be more descriptive when a location is pointing into an object
stefank
parents:
6766
diff
changeset
|
935 st->print_cr(INTPTR_FORMAT " is pointing into object: " INTPTR_FORMAT, addr, p); |
85f1cded9793
8000230: Change os::print_location to be more descriptive when a location is pointing into an object
stefank
parents:
6766
diff
changeset
|
936 } |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
937 oop(p)->print_on(st); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
938 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
939 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
940 } else { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
941 if (Universe::heap()->is_in_reserved(addr)) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
942 st->print_cr(INTPTR_FORMAT " is an unallocated location " |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
943 "in the heap", addr); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
944 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
945 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
946 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
947 if (JNIHandles::is_global_handle((jobject) addr)) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
948 st->print_cr(INTPTR_FORMAT " is a global jni handle", addr); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
949 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
950 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
951 if (JNIHandles::is_weak_global_handle((jobject) addr)) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
952 st->print_cr(INTPTR_FORMAT " is a weak global jni handle", addr); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
953 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
954 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
955 #ifndef PRODUCT |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
956 // we don't keep the block list in product mode |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
957 if (JNIHandleBlock::any_contains((jobject) addr)) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
958 st->print_cr(INTPTR_FORMAT " is a local jni handle", addr); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
959 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
960 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
961 #endif |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
962 |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
963 for(JavaThread *thread = Threads::first(); thread; thread = thread->next()) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
964 // Check for privilege stack |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
965 if (thread->privileged_stack_top() != NULL && |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
966 thread->privileged_stack_top()->contains(addr)) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
967 st->print_cr(INTPTR_FORMAT " is pointing into the privilege stack " |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
968 "for thread: " INTPTR_FORMAT, addr, thread); |
1907 | 969 if (verbose) thread->print_on(st); |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
970 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
971 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
972 // If the addr is a java thread print information about that. |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
973 if (addr == (address)thread) { |
1907 | 974 if (verbose) { |
975 thread->print_on(st); | |
976 } else { | |
977 st->print_cr(INTPTR_FORMAT " is a thread", addr); | |
978 } | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
979 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
980 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
981 // If the addr is in the stack region for this thread then report that |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
982 // and print thread info |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
983 if (thread->stack_base() >= addr && |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
984 addr > (thread->stack_base() - thread->stack_size())) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
985 st->print_cr(INTPTR_FORMAT " is pointing into the stack for thread: " |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
986 INTPTR_FORMAT, addr, thread); |
1907 | 987 if (verbose) thread->print_on(st); |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
988 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
989 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
990 |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
991 } |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
992 |
17935
7384f6a12fc1
8038212: Method::is_valid_method() check has performance regression impact for stackwalking
coleenp
parents:
17839
diff
changeset
|
993 // Check if in metaspace and print types that have vptrs (only method now) |
7384f6a12fc1
8038212: Method::is_valid_method() check has performance regression impact for stackwalking
coleenp
parents:
17839
diff
changeset
|
994 if (Metaspace::contains(addr)) { |
7384f6a12fc1
8038212: Method::is_valid_method() check has performance regression impact for stackwalking
coleenp
parents:
17839
diff
changeset
|
995 if (Method::has_method_vptr((const void*)addr)) { |
7384f6a12fc1
8038212: Method::is_valid_method() check has performance regression impact for stackwalking
coleenp
parents:
17839
diff
changeset
|
996 ((Method*)addr)->print_value_on(st); |
7384f6a12fc1
8038212: Method::is_valid_method() check has performance regression impact for stackwalking
coleenp
parents:
17839
diff
changeset
|
997 st->cr(); |
7384f6a12fc1
8038212: Method::is_valid_method() check has performance regression impact for stackwalking
coleenp
parents:
17839
diff
changeset
|
998 } else { |
7384f6a12fc1
8038212: Method::is_valid_method() check has performance regression impact for stackwalking
coleenp
parents:
17839
diff
changeset
|
999 // Use addr->print() from the debugger instead (not here) |
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1000 st->print_cr(INTPTR_FORMAT " is pointing into metadata", addr); |
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1001 } |
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1002 return; |
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1003 } |
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1004 |
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1005 // Try an OS specific find |
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1006 if (os::find(addr, st)) { |
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1007 return; |
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1008 } |
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1009 |
1907 | 1010 st->print_cr(INTPTR_FORMAT " is an unknown value", addr); |
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1011 } |
0 | 1012 |
1013 // Looks like all platforms except IA64 can use the same function to check | |
1014 // if C stack is walkable beyond current frame. The check for fp() is not | |
1015 // necessary on Sparc, but it's harmless. | |
1016 bool os::is_first_C_frame(frame* fr) { | |
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1017 #if (defined(IA64) && !defined(AIX)) && !defined(_WIN32) |
7994 | 1018 // On IA64 we have to check if the callers bsp is still valid |
1019 // (i.e. within the register stack bounds). | |
1020 // Notice: this only works for threads created by the VM and only if | |
1021 // we walk the current stack!!! If we want to be able to walk | |
1022 // arbitrary other threads, we'll have to somehow store the thread | |
1023 // object in the frame. | |
1024 Thread *thread = Thread::current(); | |
1025 if ((address)fr->fp() <= | |
1026 thread->register_stack_base() HPUX_ONLY(+ 0x0) LINUX_ONLY(+ 0x50)) { | |
1027 // This check is a little hacky, because on Linux the first C | |
1028 // frame's ('start_thread') register stack frame starts at | |
1029 // "register_stack_base + 0x48" while on HPUX, the first C frame's | |
1030 // ('__pthread_bound_body') register stack frame seems to really | |
1031 // start at "register_stack_base". | |
1032 return true; | |
1033 } else { | |
1034 return false; | |
1035 } | |
1036 #elif defined(IA64) && defined(_WIN32) | |
0 | 1037 return true; |
7994 | 1038 #else |
0 | 1039 // Load up sp, fp, sender sp and sender fp, check for reasonable values. |
1040 // Check usp first, because if that's bad the other accessors may fault | |
1041 // on some architectures. Ditto ufp second, etc. | |
1042 uintptr_t fp_align_mask = (uintptr_t)(sizeof(address)-1); | |
1043 // sp on amd can be 32 bit aligned. | |
1044 uintptr_t sp_align_mask = (uintptr_t)(sizeof(int)-1); | |
1045 | |
1046 uintptr_t usp = (uintptr_t)fr->sp(); | |
1047 if ((usp & sp_align_mask) != 0) return true; | |
1048 | |
1049 uintptr_t ufp = (uintptr_t)fr->fp(); | |
1050 if ((ufp & fp_align_mask) != 0) return true; | |
1051 | |
1052 uintptr_t old_sp = (uintptr_t)fr->sender_sp(); | |
1053 if ((old_sp & sp_align_mask) != 0) return true; | |
1054 if (old_sp == 0 || old_sp == (uintptr_t)-1) return true; | |
1055 | |
1056 uintptr_t old_fp = (uintptr_t)fr->link(); | |
1057 if ((old_fp & fp_align_mask) != 0) return true; | |
1058 if (old_fp == 0 || old_fp == (uintptr_t)-1 || old_fp == ufp) return true; | |
1059 | |
1060 // stack grows downwards; if old_fp is below current fp or if the stack | |
1061 // frame is too large, either the stack is corrupted or fp is not saved | |
1062 // on stack (i.e. on x86, ebp may be used as general register). The stack | |
1063 // is not walkable beyond current frame. | |
1064 if (old_fp < ufp) return true; | |
1065 if (old_fp - ufp > 64 * K) return true; | |
1066 | |
1067 return false; | |
7994 | 1068 #endif |
0 | 1069 } |
1070 | |
1071 #ifdef ASSERT | |
1072 extern "C" void test_random() { | |
1073 const double m = 2147483647; | |
1074 double mean = 0.0, variance = 0.0, t; | |
1075 long reps = 10000; | |
1076 unsigned long seed = 1; | |
1077 | |
1078 tty->print_cr("seed %ld for %ld repeats...", seed, reps); | |
1079 os::init_random(seed); | |
1080 long num; | |
1081 for (int k = 0; k < reps; k++) { | |
1082 num = os::random(); | |
1083 double u = (double)num / m; | |
1084 assert(u >= 0.0 && u <= 1.0, "bad random number!"); | |
1085 | |
1086 // calculate mean and variance of the random sequence | |
1087 mean += u; | |
1088 variance += (u*u); | |
1089 } | |
1090 mean /= reps; | |
1091 variance /= (reps - 1); | |
1092 | |
1093 assert(num == 1043618065, "bad seed"); | |
1094 tty->print_cr("mean of the 1st 10000 numbers: %f", mean); | |
1095 tty->print_cr("variance of the 1st 10000 numbers: %f", variance); | |
1096 const double eps = 0.0001; | |
1097 t = fabsd(mean - 0.5018); | |
1098 assert(t < eps, "bad mean"); | |
1099 t = (variance - 0.3355) < 0.0 ? -(variance - 0.3355) : variance - 0.3355; | |
1100 assert(t < eps, "bad variance"); | |
1101 } | |
1102 #endif | |
1103 | |
1104 | |
1105 // Set up the boot classpath. | |
1106 | |
1107 char* os::format_boot_path(const char* format_string, | |
1108 const char* home, | |
1109 int home_len, | |
1110 char fileSep, | |
1111 char pathSep) { | |
1112 assert((fileSep == '/' && pathSep == ':') || | |
1113 (fileSep == '\\' && pathSep == ';'), "unexpected seperator chars"); | |
1114 | |
1115 // Scan the format string to determine the length of the actual | |
1116 // boot classpath, and handle platform dependencies as well. | |
1117 int formatted_path_len = 0; | |
1118 const char* p; | |
1119 for (p = format_string; *p != 0; ++p) { | |
1120 if (*p == '%') formatted_path_len += home_len - 1; | |
1121 ++formatted_path_len; | |
1122 } | |
1123 | |
6197 | 1124 char* formatted_path = NEW_C_HEAP_ARRAY(char, formatted_path_len + 1, mtInternal); |
0 | 1125 if (formatted_path == NULL) { |
1126 return NULL; | |
1127 } | |
1128 | |
1129 // Create boot classpath from format, substituting separator chars and | |
1130 // java home directory. | |
1131 char* q = formatted_path; | |
1132 for (p = format_string; *p != 0; ++p) { | |
1133 switch (*p) { | |
1134 case '%': | |
1135 strcpy(q, home); | |
1136 q += home_len; | |
1137 break; | |
1138 case '/': | |
1139 *q++ = fileSep; | |
1140 break; | |
1141 case ':': | |
1142 *q++ = pathSep; | |
1143 break; | |
1144 default: | |
1145 *q++ = *p; | |
1146 } | |
1147 } | |
1148 *q = '\0'; | |
1149 | |
1150 assert((q - formatted_path) == formatted_path_len, "formatted_path size botched"); | |
1151 return formatted_path; | |
1152 } | |
1153 | |
1154 | |
1155 bool os::set_boot_path(char fileSep, char pathSep) { | |
1156 const char* home = Arguments::get_java_home(); | |
1157 int home_len = (int)strlen(home); | |
1158 | |
1159 static const char* meta_index_dir_format = "%/lib/"; | |
1160 static const char* meta_index_format = "%/lib/meta-index"; | |
1161 char* meta_index = format_boot_path(meta_index_format, home, home_len, fileSep, pathSep); | |
1162 if (meta_index == NULL) return false; | |
1163 char* meta_index_dir = format_boot_path(meta_index_dir_format, home, home_len, fileSep, pathSep); | |
1164 if (meta_index_dir == NULL) return false; | |
1165 Arguments::set_meta_index_path(meta_index, meta_index_dir); | |
1166 | |
1167 // Any modification to the JAR-file list, for the boot classpath must be | |
1168 // aligned with install/install/make/common/Pack.gmk. Note: boot class | |
1169 // path class JARs, are stripped for StackMapTable to reduce download size. | |
1170 static const char classpath_format[] = | |
1171 "%/lib/resources.jar:" | |
1172 "%/lib/rt.jar:" | |
1173 "%/lib/sunrsasign.jar:" | |
1174 "%/lib/jsse.jar:" | |
1175 "%/lib/jce.jar:" | |
1176 "%/lib/charsets.jar:" | |
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1177 "%/lib/jfr.jar:" |
0 | 1178 "%/classes"; |
1179 char* sysclasspath = format_boot_path(classpath_format, home, home_len, fileSep, pathSep); | |
1180 if (sysclasspath == NULL) return false; | |
1181 Arguments::set_sysclasspath(sysclasspath); | |
1182 | |
1183 return true; | |
1184 } | |
1185 | |
691 | 1186 /* |
1187 * Splits a path, based on its separator, the number of | |
1188 * elements is returned back in n. | |
1189 * It is the callers responsibility to: | |
1190 * a> check the value of n, and n may be 0. | |
1191 * b> ignore any empty path elements | |
1192 * c> free up the data. | |
1193 */ | |
1194 char** os::split_path(const char* path, int* n) { | |
1195 *n = 0; | |
1196 if (path == NULL || strlen(path) == 0) { | |
1197 return NULL; | |
1198 } | |
1199 const char psepchar = *os::path_separator(); | |
6197 | 1200 char* inpath = (char*)NEW_C_HEAP_ARRAY(char, strlen(path) + 1, mtInternal); |
691 | 1201 if (inpath == NULL) { |
1202 return NULL; | |
1203 } | |
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1204 strcpy(inpath, path); |
691 | 1205 int count = 1; |
1206 char* p = strchr(inpath, psepchar); | |
1207 // Get a count of elements to allocate memory | |
1208 while (p != NULL) { | |
1209 count++; | |
1210 p++; | |
1211 p = strchr(p, psepchar); | |
1212 } | |
6197 | 1213 char** opath = (char**) NEW_C_HEAP_ARRAY(char*, count, mtInternal); |
691 | 1214 if (opath == NULL) { |
1215 return NULL; | |
1216 } | |
1217 | |
1218 // do the actual splitting | |
1219 p = inpath; | |
1220 for (int i = 0 ; i < count ; i++) { | |
1221 size_t len = strcspn(p, os::path_separator()); | |
1222 if (len > JVM_MAXPATHLEN) { | |
1223 return NULL; | |
1224 } | |
1225 // allocate the string and add terminator storage | |
6197 | 1226 char* s = (char*)NEW_C_HEAP_ARRAY(char, len + 1, mtInternal); |
691 | 1227 if (s == NULL) { |
1228 return NULL; | |
1229 } | |
1230 strncpy(s, p, len); | |
1231 s[len] = '\0'; | |
1232 opath[i] = s; | |
1233 p += len + 1; | |
1234 } | |
6197 | 1235 FREE_C_HEAP_ARRAY(char, inpath, mtInternal); |
691 | 1236 *n = count; |
1237 return opath; | |
1238 } | |
1239 | |
0 | 1240 void os::set_memory_serialize_page(address page) { |
1241 int count = log2_intptr(sizeof(class JavaThread)) - log2_intptr(64); | |
1242 _mem_serialize_page = (volatile int32_t *)page; | |
1243 // We initialize the serialization page shift count here | |
1244 // We assume a cache line size of 64 bytes | |
1245 assert(SerializePageShiftCount == count, | |
1246 "thread size changed, fix SerializePageShiftCount constant"); | |
1247 set_serialize_page_mask((uintptr_t)(vm_page_size() - sizeof(int32_t))); | |
1248 } | |
1249 | |
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1250 static volatile intptr_t SerializePageLock = 0; |
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1251 |
0 | 1252 // This method is called from signal handler when SIGSEGV occurs while the current |
1253 // thread tries to store to the "read-only" memory serialize page during state | |
1254 // transition. | |
1255 void os::block_on_serialize_page_trap() { | |
1256 if (TraceSafepoint) { | |
1257 tty->print_cr("Block until the serialize page permission restored"); | |
1258 } | |
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1259 // When VMThread is holding the SerializePageLock during modifying the |
0 | 1260 // access permission of the memory serialize page, the following call |
1261 // will block until the permission of that page is restored to rw. | |
1262 // Generally, it is unsafe to manipulate locks in signal handlers, but in | |
1263 // this case, it's OK as the signal is synchronous and we know precisely when | |
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1264 // it can occur. |
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1265 Thread::muxAcquire(&SerializePageLock, "set_memory_serialize_page"); |
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1266 Thread::muxRelease(&SerializePageLock); |
0 | 1267 } |
1268 | |
1269 // Serialize all thread state variables | |
1270 void os::serialize_thread_states() { | |
1271 // On some platforms such as Solaris & Linux, the time duration of the page | |
1272 // permission restoration is observed to be much longer than expected due to | |
1273 // scheduler starvation problem etc. To avoid the long synchronization | |
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1274 // time and expensive page trap spinning, 'SerializePageLock' is used to block |
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1275 // the mutator thread if such case is encountered. See bug 6546278 for details. |
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1276 Thread::muxAcquire(&SerializePageLock, "serialize_thread_states"); |
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1277 os::protect_memory((char *)os::get_memory_serialize_page(), |
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1278 os::vm_page_size(), MEM_PROT_READ); |
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1279 os::protect_memory((char *)os::get_memory_serialize_page(), |
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1280 os::vm_page_size(), MEM_PROT_RW); |
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1281 Thread::muxRelease(&SerializePageLock); |
0 | 1282 } |
1283 | |
1284 // Returns true if the current stack pointer is above the stack shadow | |
1285 // pages, false otherwise. | |
1286 | |
1287 bool os::stack_shadow_pages_available(Thread *thread, methodHandle method) { | |
1288 assert(StackRedPages > 0 && StackYellowPages > 0,"Sanity check"); | |
1289 address sp = current_stack_pointer(); | |
1290 // Check if we have StackShadowPages above the yellow zone. This parameter | |
605 | 1291 // is dependent on the depth of the maximum VM call stack possible from |
0 | 1292 // the handler for stack overflow. 'instanceof' in the stack overflow |
1293 // handler or a println uses at least 8k stack of VM and native code | |
1294 // respectively. | |
1295 const int framesize_in_bytes = | |
1296 Interpreter::size_top_interpreter_activation(method()) * wordSize; | |
1297 int reserved_area = ((StackShadowPages + StackRedPages + StackYellowPages) | |
1298 * vm_page_size()) + framesize_in_bytes; | |
1299 // The very lower end of the stack | |
1300 address stack_limit = thread->stack_base() - thread->stack_size(); | |
1301 return (sp > (stack_limit + reserved_area)); | |
1302 } | |
1303 | |
1304 size_t os::page_size_for_region(size_t region_min_size, size_t region_max_size, | |
1305 uint min_pages) | |
1306 { | |
1307 assert(min_pages > 0, "sanity"); | |
1308 if (UseLargePages) { | |
1309 const size_t max_page_size = region_max_size / min_pages; | |
1310 | |
1311 for (unsigned int i = 0; _page_sizes[i] != 0; ++i) { | |
1312 const size_t sz = _page_sizes[i]; | |
1313 const size_t mask = sz - 1; | |
1314 if ((region_min_size & mask) == 0 && (region_max_size & mask) == 0) { | |
1315 // The largest page size with no fragmentation. | |
1316 return sz; | |
1317 } | |
1318 | |
1319 if (sz <= max_page_size) { | |
1320 // The largest page size that satisfies the min_pages requirement. | |
1321 return sz; | |
1322 } | |
1323 } | |
1324 } | |
1325 | |
1326 return vm_page_size(); | |
1327 } | |
1328 | |
1329 #ifndef PRODUCT | |
3859 | 1330 void os::trace_page_sizes(const char* str, const size_t* page_sizes, int count) |
1331 { | |
1332 if (TracePageSizes) { | |
1333 tty->print("%s: ", str); | |
1334 for (int i = 0; i < count; ++i) { | |
1335 tty->print(" " SIZE_FORMAT, page_sizes[i]); | |
1336 } | |
1337 tty->cr(); | |
1338 } | |
1339 } | |
1340 | |
0 | 1341 void os::trace_page_sizes(const char* str, const size_t region_min_size, |
1342 const size_t region_max_size, const size_t page_size, | |
1343 const char* base, const size_t size) | |
1344 { | |
1345 if (TracePageSizes) { | |
1346 tty->print_cr("%s: min=" SIZE_FORMAT " max=" SIZE_FORMAT | |
1347 " pg_sz=" SIZE_FORMAT " base=" PTR_FORMAT | |
1348 " size=" SIZE_FORMAT, | |
1349 str, region_min_size, region_max_size, | |
1350 page_size, base, size); | |
1351 } | |
1352 } | |
1353 #endif // #ifndef PRODUCT | |
1354 | |
1355 // This is the working definition of a server class machine: | |
1356 // >= 2 physical CPU's and >=2GB of memory, with some fuzz | |
1357 // because the graphics memory (?) sometimes masks physical memory. | |
1358 // If you want to change the definition of a server class machine | |
1359 // on some OS or platform, e.g., >=4GB on Windohs platforms, | |
1360 // then you'll have to parameterize this method based on that state, | |
1361 // as was done for logical processors here, or replicate and | |
1362 // specialize this method for each platform. (Or fix os to have | |
1363 // some inheritance structure and use subclassing. Sigh.) | |
1364 // If you want some platform to always or never behave as a server | |
1365 // class machine, change the setting of AlwaysActAsServerClassMachine | |
1366 // and NeverActAsServerClassMachine in globals*.hpp. | |
1367 bool os::is_server_class_machine() { | |
1368 // First check for the early returns | |
1369 if (NeverActAsServerClassMachine) { | |
1370 return false; | |
1371 } | |
1372 if (AlwaysActAsServerClassMachine) { | |
1373 return true; | |
1374 } | |
1375 // Then actually look at the machine | |
1376 bool result = false; | |
1377 const unsigned int server_processors = 2; | |
1378 const julong server_memory = 2UL * G; | |
1379 // We seem not to get our full complement of memory. | |
1380 // We allow some part (1/8?) of the memory to be "missing", | |
1381 // based on the sizes of DIMMs, and maybe graphics cards. | |
1382 const julong missing_memory = 256UL * M; | |
1383 | |
1384 /* Is this a server class machine? */ | |
1385 if ((os::active_processor_count() >= (int)server_processors) && | |
1386 (os::physical_memory() >= (server_memory - missing_memory))) { | |
1387 const unsigned int logical_processors = | |
1388 VM_Version::logical_processors_per_package(); | |
1389 if (logical_processors > 1) { | |
1390 const unsigned int physical_packages = | |
1391 os::active_processor_count() / logical_processors; | |
1392 if (physical_packages > server_processors) { | |
1393 result = true; | |
1394 } | |
1395 } else { | |
1396 result = true; | |
1397 } | |
1398 } | |
1399 return result; | |
1400 } | |
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1401 |
10405 | 1402 void os::SuspendedThreadTask::run() { |
1403 assert(Threads_lock->owned_by_self() || (_thread == VMThread::vm_thread()), "must have threads lock to call this"); | |
1404 internal_do_task(); | |
1405 _done = true; | |
1406 } | |
1407 | |
6197 | 1408 bool os::create_stack_guard_pages(char* addr, size_t bytes) { |
1409 return os::pd_create_stack_guard_pages(addr, bytes); | |
1410 } | |
1411 | |
1412 char* os::reserve_memory(size_t bytes, char* addr, size_t alignment_hint) { | |
1413 char* result = pd_reserve_memory(bytes, addr, alignment_hint); | |
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1414 if (result != NULL) { |
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1415 MemTracker::record_virtual_memory_reserve((address)result, bytes, mtNone, CALLER_PC); |
6197 | 1416 } |
1417 | |
1418 return result; | |
1419 } | |
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1420 |
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1421 char* os::reserve_memory(size_t bytes, char* addr, size_t alignment_hint, |
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1422 MEMFLAGS flags) { |
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1423 char* result = pd_reserve_memory(bytes, addr, alignment_hint); |
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1424 if (result != NULL) { |
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1425 MemTracker::record_virtual_memory_reserve((address)result, bytes, mtNone, CALLER_PC); |
10221
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1426 MemTracker::record_virtual_memory_type((address)result, flags); |
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1427 } |
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1428 |
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1429 return result; |
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1430 } |
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1431 |
6197 | 1432 char* os::attempt_reserve_memory_at(size_t bytes, char* addr) { |
1433 char* result = pd_attempt_reserve_memory_at(bytes, addr); | |
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1434 if (result != NULL) { |
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1435 MemTracker::record_virtual_memory_reserve((address)result, bytes, mtNone, CALLER_PC); |
6197 | 1436 } |
1437 return result; | |
1438 } | |
1439 | |
1440 void os::split_reserved_memory(char *base, size_t size, | |
1441 size_t split, bool realloc) { | |
1442 pd_split_reserved_memory(base, size, split, realloc); | |
1443 } | |
1444 | |
1445 bool os::commit_memory(char* addr, size_t bytes, bool executable) { | |
1446 bool res = pd_commit_memory(addr, bytes, executable); | |
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1447 if (res) { |
6197 | 1448 MemTracker::record_virtual_memory_commit((address)addr, bytes, CALLER_PC); |
1449 } | |
1450 return res; | |
1451 } | |
1452 | |
1453 bool os::commit_memory(char* addr, size_t size, size_t alignment_hint, | |
1454 bool executable) { | |
1455 bool res = os::pd_commit_memory(addr, size, alignment_hint, executable); | |
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1456 if (res) { |
6197 | 1457 MemTracker::record_virtual_memory_commit((address)addr, size, CALLER_PC); |
1458 } | |
1459 return res; | |
1460 } | |
1461 | |
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1462 void os::commit_memory_or_exit(char* addr, size_t bytes, bool executable, |
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1463 const char* mesg) { |
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1464 pd_commit_memory_or_exit(addr, bytes, executable, mesg); |
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1465 MemTracker::record_virtual_memory_commit((address)addr, bytes, CALLER_PC); |
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1466 } |
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1467 |
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1468 void os::commit_memory_or_exit(char* addr, size_t size, size_t alignment_hint, |
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1469 bool executable, const char* mesg) { |
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1470 os::pd_commit_memory_or_exit(addr, size, alignment_hint, executable, mesg); |
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1471 MemTracker::record_virtual_memory_commit((address)addr, size, CALLER_PC); |
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1472 } |
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1473 |
6197 | 1474 bool os::uncommit_memory(char* addr, size_t bytes) { |
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1475 MemTracker::Tracker tkr = MemTracker::get_virtual_memory_uncommit_tracker(); |
6197 | 1476 bool res = pd_uncommit_memory(addr, bytes); |
1477 if (res) { | |
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1478 tkr.record((address)addr, bytes); |
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1479 } else { |
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1480 tkr.discard(); |
6197 | 1481 } |
1482 return res; | |
1483 } | |
1484 | |
1485 bool os::release_memory(char* addr, size_t bytes) { | |
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1486 MemTracker::Tracker tkr = MemTracker::get_virtual_memory_release_tracker(); |
6197 | 1487 bool res = pd_release_memory(addr, bytes); |
1488 if (res) { | |
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1489 tkr.record((address)addr, bytes); |
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1490 } else { |
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1491 tkr.discard(); |
6197 | 1492 } |
1493 return res; | |
1494 } | |
1495 | |
1496 | |
1497 char* os::map_memory(int fd, const char* file_name, size_t file_offset, | |
1498 char *addr, size_t bytes, bool read_only, | |
1499 bool allow_exec) { | |
1500 char* result = pd_map_memory(fd, file_name, file_offset, addr, bytes, read_only, allow_exec); | |
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1501 if (result != NULL) { |
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1502 MemTracker::record_virtual_memory_reserve_and_commit((address)result, bytes, mtNone, CALLER_PC); |
6197 | 1503 } |
1504 return result; | |
1505 } | |
1506 | |
1507 char* os::remap_memory(int fd, const char* file_name, size_t file_offset, | |
1508 char *addr, size_t bytes, bool read_only, | |
1509 bool allow_exec) { | |
1510 return pd_remap_memory(fd, file_name, file_offset, addr, bytes, | |
1511 read_only, allow_exec); | |
1512 } | |
1513 | |
1514 bool os::unmap_memory(char *addr, size_t bytes) { | |
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1515 MemTracker::Tracker tkr = MemTracker::get_virtual_memory_release_tracker(); |
6197 | 1516 bool result = pd_unmap_memory(addr, bytes); |
1517 if (result) { | |
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1518 tkr.record((address)addr, bytes); |
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1519 } else { |
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1520 tkr.discard(); |
6197 | 1521 } |
1522 return result; | |
1523 } | |
1524 | |
1525 void os::free_memory(char *addr, size_t bytes, size_t alignment_hint) { | |
1526 pd_free_memory(addr, bytes, alignment_hint); | |
1527 } | |
1528 | |
1529 void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { | |
1530 pd_realign_memory(addr, bytes, alignment_hint); | |
1531 } | |
1532 | |
10405 | 1533 #ifndef TARGET_OS_FAMILY_windows |
1534 /* try to switch state from state "from" to state "to" | |
1535 * returns the state set after the method is complete | |
1536 */ | |
1537 os::SuspendResume::State os::SuspendResume::switch_state(os::SuspendResume::State from, | |
1538 os::SuspendResume::State to) | |
1539 { | |
1540 os::SuspendResume::State result = | |
1541 (os::SuspendResume::State) Atomic::cmpxchg((jint) to, (jint *) &_state, (jint) from); | |
1542 if (result == from) { | |
1543 // success | |
1544 return to; | |
1545 } | |
1546 return result; | |
1547 } | |
1548 #endif |