Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/os.cpp @ 20596:4356234e712a
8041992: Fix of JDK-8034775 neglects to account for non-JIT VMs
Summary: Allow 0 compiler threads if no JIT is used.
Reviewed-by: kvn, dholmes
Contributed-by: Severin Gehwolf <sgehwolf@redhat.com>
author | anoll |
---|---|
date | Fri, 02 May 2014 06:24:39 +0200 |
parents | ed3d653e4012 |
children | 787c9c28311f |
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" |
20360 | 52 #include "services/nmtCommon.hpp" |
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53 #include "services/mallocTracker.hpp" |
6197 | 54 #include "services/memTracker.hpp" |
1972 | 55 #include "services/threadService.hpp" |
56 #include "utilities/defaultStream.hpp" | |
57 #include "utilities/events.hpp" | |
58 #ifdef TARGET_OS_FAMILY_linux | |
59 # include "os_linux.inline.hpp" | |
60 #endif | |
61 #ifdef TARGET_OS_FAMILY_solaris | |
62 # include "os_solaris.inline.hpp" | |
63 #endif | |
64 #ifdef TARGET_OS_FAMILY_windows | |
65 # include "os_windows.inline.hpp" | |
66 #endif | |
3960 | 67 #ifdef TARGET_OS_FAMILY_bsd |
68 # include "os_bsd.inline.hpp" | |
69 #endif | |
0 | 70 |
71 # include <signal.h> | |
72 | |
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73 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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74 |
0 | 75 OSThread* os::_starting_thread = NULL; |
76 address os::_polling_page = NULL; | |
77 volatile int32_t* os::_mem_serialize_page = NULL; | |
78 uintptr_t os::_serialize_page_mask = 0; | |
79 long os::_rand_seed = 1; | |
80 int os::_processor_count = 0; | |
81 size_t os::_page_sizes[os::page_sizes_max]; | |
82 | |
83 #ifndef PRODUCT | |
2250 | 84 julong os::num_mallocs = 0; // # of calls to malloc/realloc |
85 julong os::alloc_bytes = 0; // # of bytes allocated | |
86 julong os::num_frees = 0; // # of calls to free | |
87 julong os::free_bytes = 0; // # of bytes freed | |
0 | 88 #endif |
89 | |
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90 static juint cur_malloc_words = 0; // current size for MallocMaxTestWords |
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91 |
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92 void os_init_globals() { |
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93 // Called from init_globals(). |
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94 // See Threads::create_vm() in thread.cpp, and init.cpp. |
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95 os::init_globals(); |
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96 } |
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97 |
0 | 98 // Fill in buffer with current local time as an ISO-8601 string. |
99 // E.g., yyyy-mm-ddThh:mm:ss-zzzz. | |
100 // Returns buffer, or NULL if it failed. | |
101 // This would mostly be a call to | |
102 // strftime(...., "%Y-%m-%d" "T" "%H:%M:%S" "%z", ....) | |
103 // except that on Windows the %z behaves badly, so we do it ourselves. | |
104 // Also, people wanted milliseconds on there, | |
105 // and strftime doesn't do milliseconds. | |
106 char* os::iso8601_time(char* buffer, size_t buffer_length) { | |
107 // Output will be of the form "YYYY-MM-DDThh:mm:ss.mmm+zzzz\0" | |
108 // 1 2 | |
109 // 12345678901234567890123456789 | |
110 static const char* iso8601_format = | |
111 "%04d-%02d-%02dT%02d:%02d:%02d.%03d%c%02d%02d"; | |
112 static const size_t needed_buffer = 29; | |
113 | |
114 // Sanity check the arguments | |
115 if (buffer == NULL) { | |
116 assert(false, "NULL buffer"); | |
117 return NULL; | |
118 } | |
119 if (buffer_length < needed_buffer) { | |
120 assert(false, "buffer_length too small"); | |
121 return NULL; | |
122 } | |
123 // Get the current time | |
61 | 124 jlong milliseconds_since_19700101 = javaTimeMillis(); |
0 | 125 const int milliseconds_per_microsecond = 1000; |
126 const time_t seconds_since_19700101 = | |
127 milliseconds_since_19700101 / milliseconds_per_microsecond; | |
128 const int milliseconds_after_second = | |
129 milliseconds_since_19700101 % milliseconds_per_microsecond; | |
130 // Convert the time value to a tm and timezone variable | |
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131 struct tm time_struct; |
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132 if (localtime_pd(&seconds_since_19700101, &time_struct) == NULL) { |
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133 assert(false, "Failed localtime_pd"); |
0 | 134 return NULL; |
135 } | |
3960 | 136 #if defined(_ALLBSD_SOURCE) |
137 const time_t zone = (time_t) time_struct.tm_gmtoff; | |
138 #else | |
0 | 139 const time_t zone = timezone; |
3960 | 140 #endif |
0 | 141 |
142 // If daylight savings time is in effect, | |
143 // we are 1 hour East of our time zone | |
144 const time_t seconds_per_minute = 60; | |
145 const time_t minutes_per_hour = 60; | |
146 const time_t seconds_per_hour = seconds_per_minute * minutes_per_hour; | |
147 time_t UTC_to_local = zone; | |
148 if (time_struct.tm_isdst > 0) { | |
149 UTC_to_local = UTC_to_local - seconds_per_hour; | |
150 } | |
151 // Compute the time zone offset. | |
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152 // localtime_pd() sets timezone to the difference (in seconds) |
0 | 153 // between UTC and and local time. |
154 // ISO 8601 says we need the difference between local time and UTC, | |
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155 // we change the sign of the localtime_pd() result. |
0 | 156 const time_t local_to_UTC = -(UTC_to_local); |
157 // Then we have to figure out if if we are ahead (+) or behind (-) UTC. | |
158 char sign_local_to_UTC = '+'; | |
159 time_t abs_local_to_UTC = local_to_UTC; | |
160 if (local_to_UTC < 0) { | |
161 sign_local_to_UTC = '-'; | |
162 abs_local_to_UTC = -(abs_local_to_UTC); | |
163 } | |
164 // Convert time zone offset seconds to hours and minutes. | |
165 const time_t zone_hours = (abs_local_to_UTC / seconds_per_hour); | |
166 const time_t zone_min = | |
167 ((abs_local_to_UTC % seconds_per_hour) / seconds_per_minute); | |
168 | |
169 // Print an ISO 8601 date and time stamp into the buffer | |
170 const int year = 1900 + time_struct.tm_year; | |
171 const int month = 1 + time_struct.tm_mon; | |
172 const int printed = jio_snprintf(buffer, buffer_length, iso8601_format, | |
173 year, | |
174 month, | |
175 time_struct.tm_mday, | |
176 time_struct.tm_hour, | |
177 time_struct.tm_min, | |
178 time_struct.tm_sec, | |
179 milliseconds_after_second, | |
180 sign_local_to_UTC, | |
181 zone_hours, | |
182 zone_min); | |
183 if (printed == 0) { | |
184 assert(false, "Failed jio_printf"); | |
185 return NULL; | |
186 } | |
187 return buffer; | |
188 } | |
189 | |
190 OSReturn os::set_priority(Thread* thread, ThreadPriority p) { | |
191 #ifdef ASSERT | |
192 if (!(!thread->is_Java_thread() || | |
193 Thread::current() == thread || | |
194 Threads_lock->owned_by_self() | |
195 || thread->is_Compiler_thread() | |
196 )) { | |
197 assert(false, "possibility of dangling Thread pointer"); | |
198 } | |
199 #endif | |
200 | |
201 if (p >= MinPriority && p <= MaxPriority) { | |
202 int priority = java_to_os_priority[p]; | |
203 return set_native_priority(thread, priority); | |
204 } else { | |
205 assert(false, "Should not happen"); | |
206 return OS_ERR; | |
207 } | |
208 } | |
209 | |
6766 | 210 // The mapping from OS priority back to Java priority may be inexact because |
211 // Java priorities can map M:1 with native priorities. If you want the definite | |
212 // Java priority then use JavaThread::java_priority() | |
0 | 213 OSReturn os::get_priority(const Thread* const thread, ThreadPriority& priority) { |
214 int p; | |
215 int os_prio; | |
216 OSReturn ret = get_native_priority(thread, &os_prio); | |
217 if (ret != OS_OK) return ret; | |
218 | |
6766 | 219 if (java_to_os_priority[MaxPriority] > java_to_os_priority[MinPriority]) { |
220 for (p = MaxPriority; p > MinPriority && java_to_os_priority[p] > os_prio; p--) ; | |
221 } else { | |
222 // niceness values are in reverse order | |
223 for (p = MaxPriority; p > MinPriority && java_to_os_priority[p] < os_prio; p--) ; | |
224 } | |
0 | 225 priority = (ThreadPriority)p; |
226 return OS_OK; | |
227 } | |
228 | |
229 | |
230 // --------------------- sun.misc.Signal (optional) --------------------- | |
231 | |
232 | |
233 // SIGBREAK is sent by the keyboard to query the VM state | |
234 #ifndef SIGBREAK | |
235 #define SIGBREAK SIGQUIT | |
236 #endif | |
237 | |
238 // sigexitnum_pd is a platform-specific special signal used for terminating the Signal thread. | |
239 | |
240 | |
241 static void signal_thread_entry(JavaThread* thread, TRAPS) { | |
242 os::set_priority(thread, NearMaxPriority); | |
243 while (true) { | |
244 int sig; | |
245 { | |
246 // FIXME : Currently we have not decieded what should be the status | |
247 // for this java thread blocked here. Once we decide about | |
248 // that we should fix this. | |
249 sig = os::signal_wait(); | |
250 } | |
251 if (sig == os::sigexitnum_pd()) { | |
252 // Terminate the signal thread | |
253 return; | |
254 } | |
255 | |
256 switch (sig) { | |
257 case SIGBREAK: { | |
258 // Check if the signal is a trigger to start the Attach Listener - in that | |
259 // case don't print stack traces. | |
260 if (!DisableAttachMechanism && AttachListener::is_init_trigger()) { | |
261 continue; | |
262 } | |
263 // Print stack traces | |
264 // Any SIGBREAK operations added here should make sure to flush | |
265 // the output stream (e.g. tty->flush()) after output. See 4803766. | |
266 // Each module also prints an extra carriage return after its output. | |
267 VM_PrintThreads op; | |
268 VMThread::execute(&op); | |
269 VM_PrintJNI jni_op; | |
270 VMThread::execute(&jni_op); | |
271 VM_FindDeadlocks op1(tty); | |
272 VMThread::execute(&op1); | |
273 Universe::print_heap_at_SIGBREAK(); | |
274 if (PrintClassHistogram) { | |
10405 | 275 VM_GC_HeapInspection op1(gclog_or_tty, true /* force full GC before heap inspection */); |
0 | 276 VMThread::execute(&op1); |
277 } | |
278 if (JvmtiExport::should_post_data_dump()) { | |
279 JvmtiExport::post_data_dump(); | |
280 } | |
281 break; | |
282 } | |
283 default: { | |
284 // Dispatch the signal to java | |
285 HandleMark hm(THREAD); | |
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286 Klass* k = SystemDictionary::resolve_or_null(vmSymbols::sun_misc_Signal(), THREAD); |
0 | 287 KlassHandle klass (THREAD, k); |
288 if (klass.not_null()) { | |
289 JavaValue result(T_VOID); | |
290 JavaCallArguments args; | |
291 args.push_int(sig); | |
292 JavaCalls::call_static( | |
293 &result, | |
294 klass, | |
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295 vmSymbols::dispatch_name(), |
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296 vmSymbols::int_void_signature(), |
0 | 297 &args, |
298 THREAD | |
299 ); | |
300 } | |
301 if (HAS_PENDING_EXCEPTION) { | |
302 // tty is initialized early so we don't expect it to be null, but | |
303 // if it is we can't risk doing an initialization that might | |
304 // trigger additional out-of-memory conditions | |
305 if (tty != NULL) { | |
306 char klass_name[256]; | |
307 char tmp_sig_name[16]; | |
308 const char* sig_name = "UNKNOWN"; | |
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309 InstanceKlass::cast(PENDING_EXCEPTION->klass())-> |
0 | 310 name()->as_klass_external_name(klass_name, 256); |
311 if (os::exception_name(sig, tmp_sig_name, 16) != NULL) | |
312 sig_name = tmp_sig_name; | |
313 warning("Exception %s occurred dispatching signal %s to handler" | |
314 "- the VM may need to be forcibly terminated", | |
315 klass_name, sig_name ); | |
316 } | |
317 CLEAR_PENDING_EXCEPTION; | |
318 } | |
319 } | |
320 } | |
321 } | |
322 } | |
323 | |
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324 void os::init_before_ergo() { |
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325 // We need to initialize large page support here because ergonomics takes some |
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326 // decisions depending on large page support and the calculated large page size. |
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327 large_page_init(); |
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328 } |
0 | 329 |
330 void os::signal_init() { | |
331 if (!ReduceSignalUsage) { | |
332 // Setup JavaThread for processing signals | |
333 EXCEPTION_MARK; | |
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334 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK); |
0 | 335 instanceKlassHandle klass (THREAD, k); |
336 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK); | |
337 | |
338 const char thread_name[] = "Signal Dispatcher"; | |
339 Handle string = java_lang_String::create_from_str(thread_name, CHECK); | |
340 | |
341 // Initialize thread_oop to put it into the system threadGroup | |
342 Handle thread_group (THREAD, Universe::system_thread_group()); | |
343 JavaValue result(T_VOID); | |
344 JavaCalls::call_special(&result, thread_oop, | |
345 klass, | |
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346 vmSymbols::object_initializer_name(), |
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347 vmSymbols::threadgroup_string_void_signature(), |
0 | 348 thread_group, |
349 string, | |
350 CHECK); | |
351 | |
1142 | 352 KlassHandle group(THREAD, SystemDictionary::ThreadGroup_klass()); |
0 | 353 JavaCalls::call_special(&result, |
354 thread_group, | |
355 group, | |
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356 vmSymbols::add_method_name(), |
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357 vmSymbols::thread_void_signature(), |
0 | 358 thread_oop, // ARG 1 |
359 CHECK); | |
360 | |
361 os::signal_init_pd(); | |
362 | |
363 { MutexLocker mu(Threads_lock); | |
364 JavaThread* signal_thread = new JavaThread(&signal_thread_entry); | |
365 | |
366 // At this point it may be possible that no osthread was created for the | |
367 // JavaThread due to lack of memory. We would have to throw an exception | |
368 // in that case. However, since this must work and we do not allow | |
369 // exceptions anyway, check and abort if this fails. | |
370 if (signal_thread == NULL || signal_thread->osthread() == NULL) { | |
371 vm_exit_during_initialization("java.lang.OutOfMemoryError", | |
372 "unable to create new native thread"); | |
373 } | |
374 | |
375 java_lang_Thread::set_thread(thread_oop(), signal_thread); | |
376 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority); | |
377 java_lang_Thread::set_daemon(thread_oop()); | |
378 | |
379 signal_thread->set_threadObj(thread_oop()); | |
380 Threads::add(signal_thread); | |
381 Thread::start(signal_thread); | |
382 } | |
383 // Handle ^BREAK | |
384 os::signal(SIGBREAK, os::user_handler()); | |
385 } | |
386 } | |
387 | |
388 | |
389 void os::terminate_signal_thread() { | |
390 if (!ReduceSignalUsage) | |
391 signal_notify(sigexitnum_pd()); | |
392 } | |
393 | |
394 | |
395 // --------------------- loading libraries --------------------- | |
396 | |
397 typedef jint (JNICALL *JNI_OnLoad_t)(JavaVM *, void *); | |
398 extern struct JavaVM_ main_vm; | |
399 | |
400 static void* _native_java_library = NULL; | |
401 | |
402 void* os::native_java_library() { | |
403 if (_native_java_library == NULL) { | |
404 char buffer[JVM_MAXPATHLEN]; | |
405 char ebuf[1024]; | |
406 | |
242 | 407 // Try to load verify dll first. In 1.3 java dll depends on it and is not |
408 // always able to find it when the loading executable is outside the JDK. | |
0 | 409 // In order to keep working with 1.2 we ignore any loading errors. |
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410 if (dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(), |
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411 "verify")) { |
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412 dll_load(buffer, ebuf, sizeof(ebuf)); |
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413 } |
0 | 414 |
415 // Load java dll | |
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416 if (dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(), |
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417 "java")) { |
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418 _native_java_library = dll_load(buffer, ebuf, sizeof(ebuf)); |
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419 } |
0 | 420 if (_native_java_library == NULL) { |
421 vm_exit_during_initialization("Unable to load native library", ebuf); | |
422 } | |
3960 | 423 |
424 #if defined(__OpenBSD__) | |
425 // Work-around OpenBSD's lack of $ORIGIN support by pre-loading libnet.so | |
426 // ignore errors | |
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427 if (dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(), |
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428 "net")) { |
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429 dll_load(buffer, ebuf, sizeof(ebuf)); |
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430 } |
3960 | 431 #endif |
242 | 432 } |
433 static jboolean onLoaded = JNI_FALSE; | |
434 if (onLoaded) { | |
435 // We may have to wait to fire OnLoad until TLS is initialized. | |
436 if (ThreadLocalStorage::is_initialized()) { | |
437 // The JNI_OnLoad handling is normally done by method load in | |
438 // java.lang.ClassLoader$NativeLibrary, but the VM loads the base library | |
439 // explicitly so we have to check for JNI_OnLoad as well | |
440 const char *onLoadSymbols[] = JNI_ONLOAD_SYMBOLS; | |
441 JNI_OnLoad_t JNI_OnLoad = CAST_TO_FN_PTR( | |
442 JNI_OnLoad_t, dll_lookup(_native_java_library, onLoadSymbols[0])); | |
443 if (JNI_OnLoad != NULL) { | |
444 JavaThread* thread = JavaThread::current(); | |
445 ThreadToNativeFromVM ttn(thread); | |
446 HandleMark hm(thread); | |
447 jint ver = (*JNI_OnLoad)(&main_vm, NULL); | |
448 onLoaded = JNI_TRUE; | |
449 if (!Threads::is_supported_jni_version_including_1_1(ver)) { | |
450 vm_exit_during_initialization("Unsupported JNI version"); | |
451 } | |
0 | 452 } |
453 } | |
454 } | |
455 return _native_java_library; | |
456 } | |
457 | |
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458 /* |
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459 * Support for finding Agent_On(Un)Load/Attach<_lib_name> if it exists. |
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460 * If check_lib == true then we are looking for an |
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461 * Agent_OnLoad_lib_name or Agent_OnAttach_lib_name function to determine if |
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462 * this library is statically linked into the image. |
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463 * If check_lib == false then we will look for the appropriate symbol in the |
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464 * executable if agent_lib->is_static_lib() == true or in the shared library |
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465 * referenced by 'handle'. |
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466 */ |
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467 void* os::find_agent_function(AgentLibrary *agent_lib, bool check_lib, |
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468 const char *syms[], size_t syms_len) { |
12220 | 469 assert(agent_lib != NULL, "sanity check"); |
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470 const char *lib_name; |
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471 void *handle = agent_lib->os_lib(); |
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472 void *entryName = NULL; |
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473 char *agent_function_name; |
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474 size_t i; |
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475 |
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476 // If checking then use the agent name otherwise test is_static_lib() to |
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477 // see how to process this lookup |
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478 lib_name = ((check_lib || agent_lib->is_static_lib()) ? agent_lib->name() : NULL); |
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479 for (i = 0; i < syms_len; i++) { |
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480 agent_function_name = build_agent_function_name(syms[i], lib_name, agent_lib->is_absolute_path()); |
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481 if (agent_function_name == NULL) { |
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482 break; |
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483 } |
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484 entryName = dll_lookup(handle, agent_function_name); |
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485 FREE_C_HEAP_ARRAY(char, agent_function_name, mtThread); |
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486 if (entryName != NULL) { |
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487 break; |
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488 } |
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489 } |
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490 return entryName; |
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491 } |
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492 |
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493 // See if the passed in agent is statically linked into the VM image. |
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494 bool os::find_builtin_agent(AgentLibrary *agent_lib, const char *syms[], |
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495 size_t syms_len) { |
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496 void *ret; |
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497 void *proc_handle; |
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498 void *save_handle; |
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499 |
12220 | 500 assert(agent_lib != NULL, "sanity check"); |
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501 if (agent_lib->name() == NULL) { |
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502 return false; |
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503 } |
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504 proc_handle = get_default_process_handle(); |
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505 // Check for Agent_OnLoad/Attach_lib_name function |
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506 save_handle = agent_lib->os_lib(); |
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507 // We want to look in this process' symbol table. |
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508 agent_lib->set_os_lib(proc_handle); |
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509 ret = find_agent_function(agent_lib, true, syms, syms_len); |
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510 if (ret != NULL) { |
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511 // Found an entry point like Agent_OnLoad_lib_name so we have a static agent |
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512 agent_lib->set_valid(); |
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513 agent_lib->set_static_lib(true); |
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514 return true; |
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515 } |
12220 | 516 agent_lib->set_os_lib(save_handle); |
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517 return false; |
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518 } |
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519 |
0 | 520 // --------------------- heap allocation utilities --------------------- |
521 | |
6197 | 522 char *os::strdup(const char *str, MEMFLAGS flags) { |
0 | 523 size_t size = strlen(str); |
6197 | 524 char *dup_str = (char *)malloc(size + 1, flags); |
0 | 525 if (dup_str == NULL) return NULL; |
526 strcpy(dup_str, str); | |
527 return dup_str; | |
528 } | |
529 | |
530 | |
531 | |
532 #define paranoid 0 /* only set to 1 if you suspect checking code has bug */ | |
533 | |
534 #ifdef ASSERT | |
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535 static void verify_memory(void* ptr) { |
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536 GuardedMemory guarded(ptr); |
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537 if (!guarded.verify_guards()) { |
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538 tty->print_cr("## nof_mallocs = " UINT64_FORMAT ", nof_frees = " UINT64_FORMAT, os::num_mallocs, os::num_frees); |
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539 tty->print_cr("## memory stomp:"); |
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540 guarded.print_on(tty); |
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541 fatal("memory stomping error"); |
0 | 542 } |
543 } | |
544 #endif | |
545 | |
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546 // |
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547 // This function supports testing of the malloc out of memory |
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548 // condition without really running the system out of memory. |
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549 // |
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550 static u_char* testMalloc(size_t alloc_size) { |
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551 assert(MallocMaxTestWords > 0, "sanity check"); |
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552 |
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553 if ((cur_malloc_words + (alloc_size / BytesPerWord)) > MallocMaxTestWords) { |
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554 return NULL; |
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555 } |
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556 |
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557 u_char* ptr = (u_char*)::malloc(alloc_size); |
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558 |
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559 if (ptr != NULL) { |
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560 Atomic::add(((jint) (alloc_size / BytesPerWord)), |
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561 (volatile jint *) &cur_malloc_words); |
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562 } |
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563 return ptr; |
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564 } |
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565 |
20360 | 566 void* os::malloc(size_t size, MEMFLAGS flags) { |
567 return os::malloc(size, flags, CALLER_PC); | |
568 } | |
569 | |
570 void* os::malloc(size_t size, MEMFLAGS memflags, const NativeCallStack& stack) { | |
2250 | 571 NOT_PRODUCT(inc_stat_counter(&num_mallocs, 1)); |
572 NOT_PRODUCT(inc_stat_counter(&alloc_bytes, size)); | |
0 | 573 |
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574 #if INCLUDE_NMT |
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575 // NMT can not track malloc allocation size > MAX_MALLOC_SIZE, which is |
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576 // (1GB - 1) on 32-bit system. It is not an issue on 64-bit system, where |
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577 // MAX_MALLOC_SIZE = ((1 << 62) - 1). |
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578 // VM code does not have such large malloc allocation. However, it can come |
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579 // Unsafe call. |
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580 if (MemTracker::tracking_level() >= NMT_summary && size > MAX_MALLOC_SIZE) { |
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581 return NULL; |
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582 } |
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583 #endif |
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584 |
11151 | 585 #ifdef ASSERT |
586 // checking for the WatcherThread and crash_protection first | |
587 // since os::malloc can be called when the libjvm.{dll,so} is | |
588 // first loaded and we don't have a thread yet. | |
589 // try to find the thread after we see that the watcher thread | |
590 // exists and has crash protection. | |
591 WatcherThread *wt = WatcherThread::watcher_thread(); | |
592 if (wt != NULL && wt->has_crash_protection()) { | |
593 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
594 if (thread == wt) { | |
595 assert(!wt->has_crash_protection(), | |
596 "Can't malloc with crash protection from WatcherThread"); | |
597 } | |
598 } | |
599 #endif | |
600 | |
0 | 601 if (size == 0) { |
602 // return a valid pointer if size is zero | |
603 // if NULL is returned the calling functions assume out of memory. | |
604 size = 1; | |
605 } | |
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606 |
20360 | 607 // NMT support |
608 NMT_TrackingLevel level = MemTracker::tracking_level(); | |
609 size_t nmt_header_size = MemTracker::malloc_header_size(level); | |
610 | |
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611 #ifndef ASSERT |
20360 | 612 const size_t alloc_size = size + nmt_header_size; |
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613 #else |
20360 | 614 const size_t alloc_size = GuardedMemory::get_total_size(size + nmt_header_size); |
615 if (size + nmt_header_size > alloc_size) { // Check for rollover. | |
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616 return NULL; |
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617 } |
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618 #endif |
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619 |
0 | 620 NOT_PRODUCT(if (MallocVerifyInterval > 0) check_heap()); |
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621 |
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622 u_char* ptr; |
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623 if (MallocMaxTestWords > 0) { |
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624 ptr = testMalloc(alloc_size); |
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625 } else { |
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626 ptr = (u_char*)::malloc(alloc_size); |
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627 } |
6197 | 628 |
0 | 629 #ifdef ASSERT |
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630 if (ptr == NULL) { |
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631 return NULL; |
0 | 632 } |
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633 // Wrap memory with guard |
20360 | 634 GuardedMemory guarded(ptr, size + nmt_header_size); |
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635 ptr = guarded.get_user_ptr(); |
0 | 636 #endif |
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637 if ((intptr_t)ptr == (intptr_t)MallocCatchPtr) { |
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638 tty->print_cr("os::malloc caught, " SIZE_FORMAT " bytes --> " PTR_FORMAT, size, ptr); |
0 | 639 breakpoint(); |
640 } | |
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641 debug_only(if (paranoid) verify_memory(ptr)); |
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642 if (PrintMalloc && tty != NULL) { |
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643 tty->print_cr("os::malloc " SIZE_FORMAT " bytes --> " PTR_FORMAT, size, ptr); |
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644 } |
6197 | 645 |
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646 // we do not track guard memory |
20360 | 647 return MemTracker::record_malloc((address)ptr, size, memflags, stack, level); |
0 | 648 } |
649 | |
20360 | 650 void* os::realloc(void *memblock, size_t size, MEMFLAGS flags) { |
651 return os::realloc(memblock, size, flags, CALLER_PC); | |
652 } | |
0 | 653 |
20360 | 654 void* os::realloc(void *memblock, size_t size, MEMFLAGS memflags, const NativeCallStack& stack) { |
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655 #if INCLUDE_NMT |
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656 // See comments in os::malloc() above |
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657 if (MemTracker::tracking_level() >= NMT_summary && size > MAX_MALLOC_SIZE) { |
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658 return NULL; |
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659 } |
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660 #endif |
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661 |
0 | 662 #ifndef ASSERT |
2250 | 663 NOT_PRODUCT(inc_stat_counter(&num_mallocs, 1)); |
664 NOT_PRODUCT(inc_stat_counter(&alloc_bytes, size)); | |
20360 | 665 // NMT support |
666 void* membase = MemTracker::record_free(memblock); | |
667 NMT_TrackingLevel level = MemTracker::tracking_level(); | |
668 size_t nmt_header_size = MemTracker::malloc_header_size(level); | |
669 void* ptr = ::realloc(membase, size + nmt_header_size); | |
670 return MemTracker::record_malloc(ptr, size, memflags, stack, level); | |
0 | 671 #else |
672 if (memblock == NULL) { | |
20360 | 673 return os::malloc(size, memflags, stack); |
0 | 674 } |
675 if ((intptr_t)memblock == (intptr_t)MallocCatchPtr) { | |
2250 | 676 tty->print_cr("os::realloc caught " PTR_FORMAT, memblock); |
0 | 677 breakpoint(); |
678 } | |
20360 | 679 // NMT support |
680 void* membase = MemTracker::malloc_base(memblock); | |
681 verify_memory(membase); | |
0 | 682 NOT_PRODUCT(if (MallocVerifyInterval > 0) check_heap()); |
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683 if (size == 0) { |
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684 return NULL; |
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685 } |
0 | 686 // always move the block |
20360 | 687 void* ptr = os::malloc(size, memflags, stack); |
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688 if (PrintMalloc) { |
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689 tty->print_cr("os::remalloc " SIZE_FORMAT " bytes, " PTR_FORMAT " --> " PTR_FORMAT, size, memblock, ptr); |
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690 } |
0 | 691 // Copy to new memory if malloc didn't fail |
692 if ( ptr != NULL ) { | |
20360 | 693 GuardedMemory guarded(MemTracker::malloc_base(memblock)); |
694 // Guard's user data contains NMT header | |
695 size_t memblock_size = guarded.get_user_size() - MemTracker::malloc_header_size(memblock); | |
696 memcpy(ptr, memblock, MIN2(size, memblock_size)); | |
697 if (paranoid) verify_memory(MemTracker::malloc_base(ptr)); | |
0 | 698 if ((intptr_t)ptr == (intptr_t)MallocCatchPtr) { |
2250 | 699 tty->print_cr("os::realloc caught, " SIZE_FORMAT " bytes --> " PTR_FORMAT, size, ptr); |
0 | 700 breakpoint(); |
701 } | |
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702 os::free(memblock); |
0 | 703 } |
704 return ptr; | |
705 #endif | |
706 } | |
707 | |
708 | |
6197 | 709 void os::free(void *memblock, MEMFLAGS memflags) { |
2250 | 710 NOT_PRODUCT(inc_stat_counter(&num_frees, 1)); |
0 | 711 #ifdef ASSERT |
712 if (memblock == NULL) return; | |
713 if ((intptr_t)memblock == (intptr_t)MallocCatchPtr) { | |
2250 | 714 if (tty != NULL) tty->print_cr("os::free caught " PTR_FORMAT, memblock); |
0 | 715 breakpoint(); |
716 } | |
20360 | 717 void* membase = MemTracker::record_free(memblock); |
718 verify_memory(membase); | |
0 | 719 NOT_PRODUCT(if (MallocVerifyInterval > 0) check_heap()); |
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720 |
20360 | 721 GuardedMemory guarded(membase); |
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722 size_t size = guarded.get_user_size(); |
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723 inc_stat_counter(&free_bytes, size); |
20360 | 724 membase = guarded.release_for_freeing(); |
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725 if (PrintMalloc && tty != NULL) { |
20360 | 726 fprintf(stderr, "os::free " SIZE_FORMAT " bytes --> " PTR_FORMAT "\n", size, (uintptr_t)membase); |
0 | 727 } |
20360 | 728 ::free(membase); |
729 #else | |
730 void* membase = MemTracker::record_free(memblock); | |
731 ::free(membase); | |
0 | 732 #endif |
733 } | |
734 | |
735 void os::init_random(long initval) { | |
736 _rand_seed = initval; | |
737 } | |
738 | |
739 | |
740 long os::random() { | |
741 /* standard, well-known linear congruential random generator with | |
742 * next_rand = (16807*seed) mod (2**31-1) | |
743 * see | |
744 * (1) "Random Number Generators: Good Ones Are Hard to Find", | |
745 * S.K. Park and K.W. Miller, Communications of the ACM 31:10 (Oct 1988), | |
746 * (2) "Two Fast Implementations of the 'Minimal Standard' Random | |
747 * Number Generator", David G. Carta, Comm. ACM 33, 1 (Jan 1990), pp. 87-88. | |
748 */ | |
749 const long a = 16807; | |
750 const unsigned long m = 2147483647; | |
751 const long q = m / a; assert(q == 127773, "weird math"); | |
752 const long r = m % a; assert(r == 2836, "weird math"); | |
753 | |
754 // compute az=2^31p+q | |
755 unsigned long lo = a * (long)(_rand_seed & 0xFFFF); | |
756 unsigned long hi = a * (long)((unsigned long)_rand_seed >> 16); | |
757 lo += (hi & 0x7FFF) << 16; | |
758 | |
759 // if q overflowed, ignore the overflow and increment q | |
760 if (lo > m) { | |
761 lo &= m; | |
762 ++lo; | |
763 } | |
764 lo += hi >> 15; | |
765 | |
766 // if (p+q) overflowed, ignore the overflow and increment (p+q) | |
767 if (lo > m) { | |
768 lo &= m; | |
769 ++lo; | |
770 } | |
771 return (_rand_seed = lo); | |
772 } | |
773 | |
774 // The INITIALIZED state is distinguished from the SUSPENDED state because the | |
775 // conditions in which a thread is first started are different from those in which | |
776 // a suspension is resumed. These differences make it hard for us to apply the | |
777 // tougher checks when starting threads that we want to do when resuming them. | |
778 // However, when start_thread is called as a result of Thread.start, on a Java | |
779 // thread, the operation is synchronized on the Java Thread object. So there | |
780 // cannot be a race to start the thread and hence for the thread to exit while | |
781 // we are working on it. Non-Java threads that start Java threads either have | |
782 // to do so in a context in which races are impossible, or should do appropriate | |
783 // locking. | |
784 | |
785 void os::start_thread(Thread* thread) { | |
786 // guard suspend/resume | |
787 MutexLockerEx ml(thread->SR_lock(), Mutex::_no_safepoint_check_flag); | |
788 OSThread* osthread = thread->osthread(); | |
789 osthread->set_state(RUNNABLE); | |
790 pd_start_thread(thread); | |
791 } | |
792 | |
793 //--------------------------------------------------------------------------- | |
794 // Helper functions for fatal error handler | |
795 | |
796 void os::print_hex_dump(outputStream* st, address start, address end, int unitsize) { | |
797 assert(unitsize == 1 || unitsize == 2 || unitsize == 4 || unitsize == 8, "just checking"); | |
798 | |
799 int cols = 0; | |
800 int cols_per_line = 0; | |
801 switch (unitsize) { | |
802 case 1: cols_per_line = 16; break; | |
803 case 2: cols_per_line = 8; break; | |
804 case 4: cols_per_line = 4; break; | |
805 case 8: cols_per_line = 2; break; | |
806 default: return; | |
807 } | |
808 | |
809 address p = start; | |
810 st->print(PTR_FORMAT ": ", start); | |
811 while (p < end) { | |
812 switch (unitsize) { | |
813 case 1: st->print("%02x", *(u1*)p); break; | |
814 case 2: st->print("%04x", *(u2*)p); break; | |
815 case 4: st->print("%08x", *(u4*)p); break; | |
816 case 8: st->print("%016" FORMAT64_MODIFIER "x", *(u8*)p); break; | |
817 } | |
818 p += unitsize; | |
819 cols++; | |
820 if (cols >= cols_per_line && p < end) { | |
821 cols = 0; | |
822 st->cr(); | |
823 st->print(PTR_FORMAT ": ", p); | |
824 } else { | |
825 st->print(" "); | |
826 } | |
827 } | |
828 st->cr(); | |
829 } | |
830 | |
831 void os::print_environment_variables(outputStream* st, const char** env_list, | |
832 char* buffer, int len) { | |
833 if (env_list) { | |
834 st->print_cr("Environment Variables:"); | |
835 | |
836 for (int i = 0; env_list[i] != NULL; i++) { | |
837 if (getenv(env_list[i], buffer, len)) { | |
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838 st->print("%s", env_list[i]); |
0 | 839 st->print("="); |
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840 st->print_cr("%s", buffer); |
0 | 841 } |
842 } | |
843 } | |
844 } | |
845 | |
846 void os::print_cpu_info(outputStream* st) { | |
847 // cpu | |
848 st->print("CPU:"); | |
849 st->print("total %d", os::processor_count()); | |
850 // It's not safe to query number of active processors after crash | |
851 // st->print("(active %d)", os::active_processor_count()); | |
852 st->print(" %s", VM_Version::cpu_features()); | |
853 st->cr(); | |
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854 pd_print_cpu_info(st); |
0 | 855 } |
856 | |
857 void os::print_date_and_time(outputStream *st) { | |
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858 const int secs_per_day = 86400; |
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859 const int secs_per_hour = 3600; |
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860 const int secs_per_min = 60; |
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861 |
0 | 862 time_t tloc; |
863 (void)time(&tloc); | |
864 st->print("time: %s", ctime(&tloc)); // ctime adds newline. | |
865 | |
866 double t = os::elapsedTime(); | |
867 // NOTE: It tends to crash after a SEGV if we want to printf("%f",...) in | |
868 // Linux. Must be a bug in glibc ? Workaround is to round "t" to int | |
869 // before printf. We lost some precision, but who cares? | |
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870 int eltime = (int)t; // elapsed time in seconds |
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871 |
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872 // print elapsed time in a human-readable format: |
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873 int eldays = eltime / secs_per_day; |
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874 int day_secs = eldays * secs_per_day; |
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875 int elhours = (eltime - day_secs) / secs_per_hour; |
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876 int hour_secs = elhours * secs_per_hour; |
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877 int elmins = (eltime - day_secs - hour_secs) / secs_per_min; |
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878 int minute_secs = elmins * secs_per_min; |
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879 int elsecs = (eltime - day_secs - hour_secs - minute_secs); |
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8026334: hs_err improvement: Print elapsed time in a humanly readable format
dbuck
parents:
17799
diff
changeset
|
880 st->print_cr("elapsed time: %d seconds (%dd %dh %dm %ds)", eltime, eldays, elhours, elmins, elsecs); |
0 | 881 } |
882 | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
883 // moved from debug.cpp (used to be find()) but still called from there |
1907 | 884 // The verbose parameter is only set by the debug code in one case |
885 void os::print_location(outputStream* st, intptr_t x, bool verbose) { | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
886 address addr = (address)x; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
887 CodeBlob* b = CodeCache::find_blob_unsafe(addr); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
888 if (b != NULL) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
889 if (b->is_buffer_blob()) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
890 // the interpreter is generated into a buffer blob |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
891 InterpreterCodelet* i = Interpreter::codelet_containing(addr); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
892 if (i != NULL) { |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
893 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
|
894 i->print_on(st); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
895 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
896 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
897 if (Interpreter::contains(addr)) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
898 st->print_cr(INTPTR_FORMAT " is pointing into interpreter code" |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
899 " (not bytecode specific)", addr); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
900 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
901 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
902 // |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
903 if (AdapterHandlerLibrary::contains(b)) { |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
904 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
|
905 AdapterHandlerLibrary::print_handler_on(st, b); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
906 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
907 // the stubroutines are generated into a buffer blob |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
908 StubCodeDesc* d = StubCodeDesc::desc_for(addr); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
909 if (d != NULL) { |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
910 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
|
911 d->print_on(st); |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
912 st->cr(); |
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 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
915 if (StubRoutines::contains(addr)) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
916 st->print_cr(INTPTR_FORMAT " is pointing to an (unnamed) " |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
917 "stub routine", addr); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
918 return; |
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 // the InlineCacheBuffer is using stubs generated into a buffer blob |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
921 if (InlineCacheBuffer::contains(addr)) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
922 st->print_cr(INTPTR_FORMAT " is pointing into InlineCacheBuffer", addr); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
923 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
924 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
925 VtableStub* v = VtableStubs::stub_containing(addr); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
926 if (v != NULL) { |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
927 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
|
928 v->print_on(st); |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
929 st->cr(); |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
930 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
931 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
932 } |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
933 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
|
934 if (nm != NULL) { |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
935 ResourceMark rm; |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
936 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
|
937 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
|
938 if (verbose) { |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
939 st->print(" for "); |
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
940 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
|
941 } |
6816
87ac5c0a404d
8000228: Missing call to cr() when printing entry_point in nmethod, in os::print_location
stefank
parents:
6814
diff
changeset
|
942 st->cr(); |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
943 nm->print_nmethod(verbose); |
1681
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 } |
6266
1d7922586cf6
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
6197
diff
changeset
|
946 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
|
947 b->print_on(st); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
948 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
949 } |
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 (Universe::heap()->is_in(addr)) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
952 HeapWord* p = Universe::heap()->block_start(addr); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
953 bool print = false; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
954 // 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
|
955 // See if we were just given an oop directly |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
956 if (p != NULL && Universe::heap()->block_is_obj(p)) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
957 print = true; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
958 } else if (p == NULL && ((oopDesc*)addr)->is_oop()) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
959 p = (HeapWord*) addr; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
960 print = true; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
961 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
962 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
|
963 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
|
964 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
|
965 } else { |
85f1cded9793
8000230: Change os::print_location to be more descriptive when a location is pointing into an object
stefank
parents:
6766
diff
changeset
|
966 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
|
967 } |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
968 oop(p)->print_on(st); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
969 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
970 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
971 } else { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
972 if (Universe::heap()->is_in_reserved(addr)) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
973 st->print_cr(INTPTR_FORMAT " is an unallocated location " |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
974 "in the heap", addr); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
975 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
976 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
977 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
978 if (JNIHandles::is_global_handle((jobject) addr)) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
979 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
|
980 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
981 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
982 if (JNIHandles::is_weak_global_handle((jobject) addr)) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
983 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
|
984 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
985 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
986 #ifndef PRODUCT |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
987 // we don't keep the block list in product mode |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
988 if (JNIHandleBlock::any_contains((jobject) addr)) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
989 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
|
990 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
991 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
992 #endif |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
993 |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
994 for(JavaThread *thread = Threads::first(); thread; thread = thread->next()) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
995 // Check for privilege stack |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
996 if (thread->privileged_stack_top() != NULL && |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
997 thread->privileged_stack_top()->contains(addr)) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
998 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
|
999 "for thread: " INTPTR_FORMAT, addr, thread); |
1907 | 1000 if (verbose) thread->print_on(st); |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1001 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1002 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1003 // 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
|
1004 if (addr == (address)thread) { |
1907 | 1005 if (verbose) { |
1006 thread->print_on(st); | |
1007 } else { | |
1008 st->print_cr(INTPTR_FORMAT " is a thread", addr); | |
1009 } | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1010 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1011 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1012 // 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
|
1013 // and print thread info |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1014 if (thread->stack_base() >= addr && |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1015 addr > (thread->stack_base() - thread->stack_size())) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1016 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
|
1017 INTPTR_FORMAT, addr, thread); |
1907 | 1018 if (verbose) thread->print_on(st); |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1019 return; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1020 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1021 |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1022 } |
6725
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1023 |
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1024 // Check if in metaspace and print types that have vptrs (only method now) |
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1025 if (Metaspace::contains(addr)) { |
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1026 if (Method::has_method_vptr((const void*)addr)) { |
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1027 ((Method*)addr)->print_value_on(st); |
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1028 st->cr(); |
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1029 } else { |
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1030 // Use addr->print() from the debugger instead (not here) |
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1031 st->print_cr(INTPTR_FORMAT " is pointing into metadata", addr); |
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1032 } |
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1033 return; |
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1034 } |
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1035 |
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1036 // Try an OS specific find |
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1037 if (os::find(addr, st)) { |
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1038 return; |
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1039 } |
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1040 |
1907 | 1041 st->print_cr(INTPTR_FORMAT " is an unknown value", addr); |
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1042 } |
0 | 1043 |
1044 // Looks like all platforms except IA64 can use the same function to check | |
1045 // if C stack is walkable beyond current frame. The check for fp() is not | |
1046 // necessary on Sparc, but it's harmless. | |
1047 bool os::is_first_C_frame(frame* fr) { | |
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1048 #if (defined(IA64) && !defined(AIX)) && !defined(_WIN32) |
7994 | 1049 // On IA64 we have to check if the callers bsp is still valid |
1050 // (i.e. within the register stack bounds). | |
1051 // Notice: this only works for threads created by the VM and only if | |
1052 // we walk the current stack!!! If we want to be able to walk | |
1053 // arbitrary other threads, we'll have to somehow store the thread | |
1054 // object in the frame. | |
1055 Thread *thread = Thread::current(); | |
1056 if ((address)fr->fp() <= | |
1057 thread->register_stack_base() HPUX_ONLY(+ 0x0) LINUX_ONLY(+ 0x50)) { | |
1058 // This check is a little hacky, because on Linux the first C | |
1059 // frame's ('start_thread') register stack frame starts at | |
1060 // "register_stack_base + 0x48" while on HPUX, the first C frame's | |
1061 // ('__pthread_bound_body') register stack frame seems to really | |
1062 // start at "register_stack_base". | |
1063 return true; | |
1064 } else { | |
1065 return false; | |
1066 } | |
1067 #elif defined(IA64) && defined(_WIN32) | |
0 | 1068 return true; |
7994 | 1069 #else |
0 | 1070 // Load up sp, fp, sender sp and sender fp, check for reasonable values. |
1071 // Check usp first, because if that's bad the other accessors may fault | |
1072 // on some architectures. Ditto ufp second, etc. | |
1073 uintptr_t fp_align_mask = (uintptr_t)(sizeof(address)-1); | |
1074 // sp on amd can be 32 bit aligned. | |
1075 uintptr_t sp_align_mask = (uintptr_t)(sizeof(int)-1); | |
1076 | |
1077 uintptr_t usp = (uintptr_t)fr->sp(); | |
1078 if ((usp & sp_align_mask) != 0) return true; | |
1079 | |
1080 uintptr_t ufp = (uintptr_t)fr->fp(); | |
1081 if ((ufp & fp_align_mask) != 0) return true; | |
1082 | |
1083 uintptr_t old_sp = (uintptr_t)fr->sender_sp(); | |
1084 if ((old_sp & sp_align_mask) != 0) return true; | |
1085 if (old_sp == 0 || old_sp == (uintptr_t)-1) return true; | |
1086 | |
1087 uintptr_t old_fp = (uintptr_t)fr->link(); | |
1088 if ((old_fp & fp_align_mask) != 0) return true; | |
1089 if (old_fp == 0 || old_fp == (uintptr_t)-1 || old_fp == ufp) return true; | |
1090 | |
1091 // stack grows downwards; if old_fp is below current fp or if the stack | |
1092 // frame is too large, either the stack is corrupted or fp is not saved | |
1093 // on stack (i.e. on x86, ebp may be used as general register). The stack | |
1094 // is not walkable beyond current frame. | |
1095 if (old_fp < ufp) return true; | |
1096 if (old_fp - ufp > 64 * K) return true; | |
1097 | |
1098 return false; | |
7994 | 1099 #endif |
0 | 1100 } |
1101 | |
1102 #ifdef ASSERT | |
1103 extern "C" void test_random() { | |
1104 const double m = 2147483647; | |
1105 double mean = 0.0, variance = 0.0, t; | |
1106 long reps = 10000; | |
1107 unsigned long seed = 1; | |
1108 | |
1109 tty->print_cr("seed %ld for %ld repeats...", seed, reps); | |
1110 os::init_random(seed); | |
1111 long num; | |
1112 for (int k = 0; k < reps; k++) { | |
1113 num = os::random(); | |
1114 double u = (double)num / m; | |
1115 assert(u >= 0.0 && u <= 1.0, "bad random number!"); | |
1116 | |
1117 // calculate mean and variance of the random sequence | |
1118 mean += u; | |
1119 variance += (u*u); | |
1120 } | |
1121 mean /= reps; | |
1122 variance /= (reps - 1); | |
1123 | |
1124 assert(num == 1043618065, "bad seed"); | |
1125 tty->print_cr("mean of the 1st 10000 numbers: %f", mean); | |
1126 tty->print_cr("variance of the 1st 10000 numbers: %f", variance); | |
1127 const double eps = 0.0001; | |
1128 t = fabsd(mean - 0.5018); | |
1129 assert(t < eps, "bad mean"); | |
1130 t = (variance - 0.3355) < 0.0 ? -(variance - 0.3355) : variance - 0.3355; | |
1131 assert(t < eps, "bad variance"); | |
1132 } | |
1133 #endif | |
1134 | |
1135 | |
1136 // Set up the boot classpath. | |
1137 | |
1138 char* os::format_boot_path(const char* format_string, | |
1139 const char* home, | |
1140 int home_len, | |
1141 char fileSep, | |
1142 char pathSep) { | |
1143 assert((fileSep == '/' && pathSep == ':') || | |
1144 (fileSep == '\\' && pathSep == ';'), "unexpected seperator chars"); | |
1145 | |
1146 // Scan the format string to determine the length of the actual | |
1147 // boot classpath, and handle platform dependencies as well. | |
1148 int formatted_path_len = 0; | |
1149 const char* p; | |
1150 for (p = format_string; *p != 0; ++p) { | |
1151 if (*p == '%') formatted_path_len += home_len - 1; | |
1152 ++formatted_path_len; | |
1153 } | |
1154 | |
6197 | 1155 char* formatted_path = NEW_C_HEAP_ARRAY(char, formatted_path_len + 1, mtInternal); |
0 | 1156 if (formatted_path == NULL) { |
1157 return NULL; | |
1158 } | |
1159 | |
1160 // Create boot classpath from format, substituting separator chars and | |
1161 // java home directory. | |
1162 char* q = formatted_path; | |
1163 for (p = format_string; *p != 0; ++p) { | |
1164 switch (*p) { | |
1165 case '%': | |
1166 strcpy(q, home); | |
1167 q += home_len; | |
1168 break; | |
1169 case '/': | |
1170 *q++ = fileSep; | |
1171 break; | |
1172 case ':': | |
1173 *q++ = pathSep; | |
1174 break; | |
1175 default: | |
1176 *q++ = *p; | |
1177 } | |
1178 } | |
1179 *q = '\0'; | |
1180 | |
1181 assert((q - formatted_path) == formatted_path_len, "formatted_path size botched"); | |
1182 return formatted_path; | |
1183 } | |
1184 | |
1185 | |
1186 bool os::set_boot_path(char fileSep, char pathSep) { | |
1187 const char* home = Arguments::get_java_home(); | |
1188 int home_len = (int)strlen(home); | |
1189 | |
1190 static const char* meta_index_dir_format = "%/lib/"; | |
1191 static const char* meta_index_format = "%/lib/meta-index"; | |
1192 char* meta_index = format_boot_path(meta_index_format, home, home_len, fileSep, pathSep); | |
1193 if (meta_index == NULL) return false; | |
1194 char* meta_index_dir = format_boot_path(meta_index_dir_format, home, home_len, fileSep, pathSep); | |
1195 if (meta_index_dir == NULL) return false; | |
1196 Arguments::set_meta_index_path(meta_index, meta_index_dir); | |
1197 | |
1198 // Any modification to the JAR-file list, for the boot classpath must be | |
1199 // aligned with install/install/make/common/Pack.gmk. Note: boot class | |
1200 // path class JARs, are stripped for StackMapTable to reduce download size. | |
1201 static const char classpath_format[] = | |
1202 "%/lib/resources.jar:" | |
1203 "%/lib/rt.jar:" | |
1204 "%/lib/sunrsasign.jar:" | |
1205 "%/lib/jsse.jar:" | |
1206 "%/lib/jce.jar:" | |
1207 "%/lib/charsets.jar:" | |
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1208 "%/lib/jfr.jar:" |
0 | 1209 "%/classes"; |
1210 char* sysclasspath = format_boot_path(classpath_format, home, home_len, fileSep, pathSep); | |
1211 if (sysclasspath == NULL) return false; | |
1212 Arguments::set_sysclasspath(sysclasspath); | |
1213 | |
1214 return true; | |
1215 } | |
1216 | |
691 | 1217 /* |
1218 * Splits a path, based on its separator, the number of | |
1219 * elements is returned back in n. | |
1220 * It is the callers responsibility to: | |
1221 * a> check the value of n, and n may be 0. | |
1222 * b> ignore any empty path elements | |
1223 * c> free up the data. | |
1224 */ | |
1225 char** os::split_path(const char* path, int* n) { | |
1226 *n = 0; | |
1227 if (path == NULL || strlen(path) == 0) { | |
1228 return NULL; | |
1229 } | |
1230 const char psepchar = *os::path_separator(); | |
6197 | 1231 char* inpath = (char*)NEW_C_HEAP_ARRAY(char, strlen(path) + 1, mtInternal); |
691 | 1232 if (inpath == NULL) { |
1233 return NULL; | |
1234 } | |
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1235 strcpy(inpath, path); |
691 | 1236 int count = 1; |
1237 char* p = strchr(inpath, psepchar); | |
1238 // Get a count of elements to allocate memory | |
1239 while (p != NULL) { | |
1240 count++; | |
1241 p++; | |
1242 p = strchr(p, psepchar); | |
1243 } | |
6197 | 1244 char** opath = (char**) NEW_C_HEAP_ARRAY(char*, count, mtInternal); |
691 | 1245 if (opath == NULL) { |
1246 return NULL; | |
1247 } | |
1248 | |
1249 // do the actual splitting | |
1250 p = inpath; | |
1251 for (int i = 0 ; i < count ; i++) { | |
1252 size_t len = strcspn(p, os::path_separator()); | |
1253 if (len > JVM_MAXPATHLEN) { | |
1254 return NULL; | |
1255 } | |
1256 // allocate the string and add terminator storage | |
6197 | 1257 char* s = (char*)NEW_C_HEAP_ARRAY(char, len + 1, mtInternal); |
691 | 1258 if (s == NULL) { |
1259 return NULL; | |
1260 } | |
1261 strncpy(s, p, len); | |
1262 s[len] = '\0'; | |
1263 opath[i] = s; | |
1264 p += len + 1; | |
1265 } | |
6197 | 1266 FREE_C_HEAP_ARRAY(char, inpath, mtInternal); |
691 | 1267 *n = count; |
1268 return opath; | |
1269 } | |
1270 | |
0 | 1271 void os::set_memory_serialize_page(address page) { |
1272 int count = log2_intptr(sizeof(class JavaThread)) - log2_intptr(64); | |
1273 _mem_serialize_page = (volatile int32_t *)page; | |
1274 // We initialize the serialization page shift count here | |
1275 // We assume a cache line size of 64 bytes | |
1276 assert(SerializePageShiftCount == count, | |
1277 "thread size changed, fix SerializePageShiftCount constant"); | |
1278 set_serialize_page_mask((uintptr_t)(vm_page_size() - sizeof(int32_t))); | |
1279 } | |
1280 | |
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1281 static volatile intptr_t SerializePageLock = 0; |
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1282 |
0 | 1283 // This method is called from signal handler when SIGSEGV occurs while the current |
1284 // thread tries to store to the "read-only" memory serialize page during state | |
1285 // transition. | |
1286 void os::block_on_serialize_page_trap() { | |
1287 if (TraceSafepoint) { | |
1288 tty->print_cr("Block until the serialize page permission restored"); | |
1289 } | |
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1290 // When VMThread is holding the SerializePageLock during modifying the |
0 | 1291 // access permission of the memory serialize page, the following call |
1292 // will block until the permission of that page is restored to rw. | |
1293 // Generally, it is unsafe to manipulate locks in signal handlers, but in | |
1294 // this case, it's OK as the signal is synchronous and we know precisely when | |
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1295 // it can occur. |
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1296 Thread::muxAcquire(&SerializePageLock, "set_memory_serialize_page"); |
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1297 Thread::muxRelease(&SerializePageLock); |
0 | 1298 } |
1299 | |
1300 // Serialize all thread state variables | |
1301 void os::serialize_thread_states() { | |
1302 // On some platforms such as Solaris & Linux, the time duration of the page | |
1303 // permission restoration is observed to be much longer than expected due to | |
1304 // scheduler starvation problem etc. To avoid the long synchronization | |
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1305 // time and expensive page trap spinning, 'SerializePageLock' is used to block |
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1306 // the mutator thread if such case is encountered. See bug 6546278 for details. |
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1307 Thread::muxAcquire(&SerializePageLock, "serialize_thread_states"); |
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1308 os::protect_memory((char *)os::get_memory_serialize_page(), |
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1309 os::vm_page_size(), MEM_PROT_READ); |
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1310 os::protect_memory((char *)os::get_memory_serialize_page(), |
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1311 os::vm_page_size(), MEM_PROT_RW); |
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1312 Thread::muxRelease(&SerializePageLock); |
0 | 1313 } |
1314 | |
1315 // Returns true if the current stack pointer is above the stack shadow | |
1316 // pages, false otherwise. | |
1317 | |
1318 bool os::stack_shadow_pages_available(Thread *thread, methodHandle method) { | |
1319 assert(StackRedPages > 0 && StackYellowPages > 0,"Sanity check"); | |
1320 address sp = current_stack_pointer(); | |
1321 // Check if we have StackShadowPages above the yellow zone. This parameter | |
605 | 1322 // is dependent on the depth of the maximum VM call stack possible from |
0 | 1323 // the handler for stack overflow. 'instanceof' in the stack overflow |
1324 // handler or a println uses at least 8k stack of VM and native code | |
1325 // respectively. | |
1326 const int framesize_in_bytes = | |
1327 Interpreter::size_top_interpreter_activation(method()) * wordSize; | |
1328 int reserved_area = ((StackShadowPages + StackRedPages + StackYellowPages) | |
1329 * vm_page_size()) + framesize_in_bytes; | |
1330 // The very lower end of the stack | |
1331 address stack_limit = thread->stack_base() - thread->stack_size(); | |
1332 return (sp > (stack_limit + reserved_area)); | |
1333 } | |
1334 | |
1335 size_t os::page_size_for_region(size_t region_min_size, size_t region_max_size, | |
1336 uint min_pages) | |
1337 { | |
1338 assert(min_pages > 0, "sanity"); | |
1339 if (UseLargePages) { | |
1340 const size_t max_page_size = region_max_size / min_pages; | |
1341 | |
1342 for (unsigned int i = 0; _page_sizes[i] != 0; ++i) { | |
1343 const size_t sz = _page_sizes[i]; | |
1344 const size_t mask = sz - 1; | |
1345 if ((region_min_size & mask) == 0 && (region_max_size & mask) == 0) { | |
1346 // The largest page size with no fragmentation. | |
1347 return sz; | |
1348 } | |
1349 | |
1350 if (sz <= max_page_size) { | |
1351 // The largest page size that satisfies the min_pages requirement. | |
1352 return sz; | |
1353 } | |
1354 } | |
1355 } | |
1356 | |
1357 return vm_page_size(); | |
1358 } | |
1359 | |
1360 #ifndef PRODUCT | |
3859 | 1361 void os::trace_page_sizes(const char* str, const size_t* page_sizes, int count) |
1362 { | |
1363 if (TracePageSizes) { | |
1364 tty->print("%s: ", str); | |
1365 for (int i = 0; i < count; ++i) { | |
1366 tty->print(" " SIZE_FORMAT, page_sizes[i]); | |
1367 } | |
1368 tty->cr(); | |
1369 } | |
1370 } | |
1371 | |
0 | 1372 void os::trace_page_sizes(const char* str, const size_t region_min_size, |
1373 const size_t region_max_size, const size_t page_size, | |
1374 const char* base, const size_t size) | |
1375 { | |
1376 if (TracePageSizes) { | |
1377 tty->print_cr("%s: min=" SIZE_FORMAT " max=" SIZE_FORMAT | |
1378 " pg_sz=" SIZE_FORMAT " base=" PTR_FORMAT | |
1379 " size=" SIZE_FORMAT, | |
1380 str, region_min_size, region_max_size, | |
1381 page_size, base, size); | |
1382 } | |
1383 } | |
1384 #endif // #ifndef PRODUCT | |
1385 | |
1386 // This is the working definition of a server class machine: | |
1387 // >= 2 physical CPU's and >=2GB of memory, with some fuzz | |
1388 // because the graphics memory (?) sometimes masks physical memory. | |
1389 // If you want to change the definition of a server class machine | |
1390 // on some OS or platform, e.g., >=4GB on Windohs platforms, | |
1391 // then you'll have to parameterize this method based on that state, | |
1392 // as was done for logical processors here, or replicate and | |
1393 // specialize this method for each platform. (Or fix os to have | |
1394 // some inheritance structure and use subclassing. Sigh.) | |
1395 // If you want some platform to always or never behave as a server | |
1396 // class machine, change the setting of AlwaysActAsServerClassMachine | |
1397 // and NeverActAsServerClassMachine in globals*.hpp. | |
1398 bool os::is_server_class_machine() { | |
1399 // First check for the early returns | |
1400 if (NeverActAsServerClassMachine) { | |
1401 return false; | |
1402 } | |
1403 if (AlwaysActAsServerClassMachine) { | |
1404 return true; | |
1405 } | |
1406 // Then actually look at the machine | |
1407 bool result = false; | |
1408 const unsigned int server_processors = 2; | |
1409 const julong server_memory = 2UL * G; | |
1410 // We seem not to get our full complement of memory. | |
1411 // We allow some part (1/8?) of the memory to be "missing", | |
1412 // based on the sizes of DIMMs, and maybe graphics cards. | |
1413 const julong missing_memory = 256UL * M; | |
1414 | |
1415 /* Is this a server class machine? */ | |
1416 if ((os::active_processor_count() >= (int)server_processors) && | |
1417 (os::physical_memory() >= (server_memory - missing_memory))) { | |
1418 const unsigned int logical_processors = | |
1419 VM_Version::logical_processors_per_package(); | |
1420 if (logical_processors > 1) { | |
1421 const unsigned int physical_packages = | |
1422 os::active_processor_count() / logical_processors; | |
1423 if (physical_packages > server_processors) { | |
1424 result = true; | |
1425 } | |
1426 } else { | |
1427 result = true; | |
1428 } | |
1429 } | |
1430 return result; | |
1431 } | |
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1432 |
10405 | 1433 void os::SuspendedThreadTask::run() { |
1434 assert(Threads_lock->owned_by_self() || (_thread == VMThread::vm_thread()), "must have threads lock to call this"); | |
1435 internal_do_task(); | |
1436 _done = true; | |
1437 } | |
1438 | |
6197 | 1439 bool os::create_stack_guard_pages(char* addr, size_t bytes) { |
1440 return os::pd_create_stack_guard_pages(addr, bytes); | |
1441 } | |
1442 | |
1443 char* os::reserve_memory(size_t bytes, char* addr, size_t alignment_hint) { | |
1444 char* result = pd_reserve_memory(bytes, addr, alignment_hint); | |
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1445 if (result != NULL) { |
20360 | 1446 MemTracker::record_virtual_memory_reserve((address)result, bytes, CALLER_PC); |
6197 | 1447 } |
1448 | |
1449 return result; | |
1450 } | |
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1451 |
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1452 char* os::reserve_memory(size_t bytes, char* addr, size_t alignment_hint, |
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1453 MEMFLAGS flags) { |
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1454 char* result = pd_reserve_memory(bytes, addr, alignment_hint); |
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1455 if (result != NULL) { |
20360 | 1456 MemTracker::record_virtual_memory_reserve((address)result, bytes, CALLER_PC); |
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1457 MemTracker::record_virtual_memory_type((address)result, flags); |
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1458 } |
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1459 |
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1460 return result; |
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1461 } |
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1462 |
6197 | 1463 char* os::attempt_reserve_memory_at(size_t bytes, char* addr) { |
1464 char* result = pd_attempt_reserve_memory_at(bytes, addr); | |
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1465 if (result != NULL) { |
20360 | 1466 MemTracker::record_virtual_memory_reserve((address)result, bytes, CALLER_PC); |
6197 | 1467 } |
1468 return result; | |
1469 } | |
1470 | |
1471 void os::split_reserved_memory(char *base, size_t size, | |
1472 size_t split, bool realloc) { | |
1473 pd_split_reserved_memory(base, size, split, realloc); | |
1474 } | |
1475 | |
1476 bool os::commit_memory(char* addr, size_t bytes, bool executable) { | |
1477 bool res = pd_commit_memory(addr, bytes, executable); | |
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1478 if (res) { |
6197 | 1479 MemTracker::record_virtual_memory_commit((address)addr, bytes, CALLER_PC); |
1480 } | |
1481 return res; | |
1482 } | |
1483 | |
1484 bool os::commit_memory(char* addr, size_t size, size_t alignment_hint, | |
1485 bool executable) { | |
1486 bool res = os::pd_commit_memory(addr, size, alignment_hint, executable); | |
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1487 if (res) { |
6197 | 1488 MemTracker::record_virtual_memory_commit((address)addr, size, CALLER_PC); |
1489 } | |
1490 return res; | |
1491 } | |
1492 | |
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1493 void os::commit_memory_or_exit(char* addr, size_t bytes, bool executable, |
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1494 const char* mesg) { |
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1495 pd_commit_memory_or_exit(addr, bytes, executable, mesg); |
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1496 MemTracker::record_virtual_memory_commit((address)addr, bytes, CALLER_PC); |
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1497 } |
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1498 |
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1499 void os::commit_memory_or_exit(char* addr, size_t size, size_t alignment_hint, |
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1500 bool executable, const char* mesg) { |
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1501 os::pd_commit_memory_or_exit(addr, size, alignment_hint, executable, mesg); |
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1502 MemTracker::record_virtual_memory_commit((address)addr, size, CALLER_PC); |
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1503 } |
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1504 |
6197 | 1505 bool os::uncommit_memory(char* addr, size_t bytes) { |
20360 | 1506 bool res; |
1507 if (MemTracker::tracking_level() > NMT_minimal) { | |
1508 Tracker tkr = MemTracker::get_virtual_memory_uncommit_tracker(); | |
1509 res = pd_uncommit_memory(addr, bytes); | |
1510 if (res) { | |
1511 tkr.record((address)addr, bytes); | |
1512 } | |
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1513 } else { |
20360 | 1514 res = pd_uncommit_memory(addr, bytes); |
6197 | 1515 } |
1516 return res; | |
1517 } | |
1518 | |
1519 bool os::release_memory(char* addr, size_t bytes) { | |
20360 | 1520 bool res; |
1521 if (MemTracker::tracking_level() > NMT_minimal) { | |
1522 Tracker tkr = MemTracker::get_virtual_memory_release_tracker(); | |
1523 res = pd_release_memory(addr, bytes); | |
1524 if (res) { | |
1525 tkr.record((address)addr, bytes); | |
1526 } | |
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1527 } else { |
20360 | 1528 res = pd_release_memory(addr, bytes); |
6197 | 1529 } |
1530 return res; | |
1531 } | |
1532 | |
1533 | |
1534 char* os::map_memory(int fd, const char* file_name, size_t file_offset, | |
1535 char *addr, size_t bytes, bool read_only, | |
1536 bool allow_exec) { | |
1537 char* result = pd_map_memory(fd, file_name, file_offset, addr, bytes, read_only, allow_exec); | |
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1538 if (result != NULL) { |
20360 | 1539 MemTracker::record_virtual_memory_reserve_and_commit((address)result, bytes, CALLER_PC); |
6197 | 1540 } |
1541 return result; | |
1542 } | |
1543 | |
1544 char* os::remap_memory(int fd, const char* file_name, size_t file_offset, | |
1545 char *addr, size_t bytes, bool read_only, | |
1546 bool allow_exec) { | |
1547 return pd_remap_memory(fd, file_name, file_offset, addr, bytes, | |
1548 read_only, allow_exec); | |
1549 } | |
1550 | |
1551 bool os::unmap_memory(char *addr, size_t bytes) { | |
20360 | 1552 bool result; |
1553 if (MemTracker::tracking_level() > NMT_minimal) { | |
1554 Tracker tkr = MemTracker::get_virtual_memory_release_tracker(); | |
1555 result = pd_unmap_memory(addr, bytes); | |
1556 if (result) { | |
1557 tkr.record((address)addr, bytes); | |
1558 } | |
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1559 } else { |
20360 | 1560 result = pd_unmap_memory(addr, bytes); |
6197 | 1561 } |
1562 return result; | |
1563 } | |
1564 | |
1565 void os::free_memory(char *addr, size_t bytes, size_t alignment_hint) { | |
1566 pd_free_memory(addr, bytes, alignment_hint); | |
1567 } | |
1568 | |
1569 void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { | |
1570 pd_realign_memory(addr, bytes, alignment_hint); | |
1571 } | |
1572 | |
10405 | 1573 #ifndef TARGET_OS_FAMILY_windows |
1574 /* try to switch state from state "from" to state "to" | |
1575 * returns the state set after the method is complete | |
1576 */ | |
1577 os::SuspendResume::State os::SuspendResume::switch_state(os::SuspendResume::State from, | |
1578 os::SuspendResume::State to) | |
1579 { | |
1580 os::SuspendResume::State result = | |
1581 (os::SuspendResume::State) Atomic::cmpxchg((jint) to, (jint *) &_state, (jint) from); | |
1582 if (result == from) { | |
1583 // success | |
1584 return to; | |
1585 } | |
1586 return result; | |
1587 } | |
1588 #endif |