Аварийный дамп – чёрный ящик упавшей JVM. Андрей Паньгин
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The document discusses various fatal errors detected by the Java Runtime Environment (JRE), such as SIGSEGV and SIGFPE, that can occur due to issues in native code, incorrect use of private APIs, bugs within the JVM, or hardware problems. It provides technical details including error signals, problematic frames, and CPU registers information related to these crashes. Additionally, it highlights the significance of proper management and understanding of errors to avoid JVM failures.
![Java vs. C
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Crash!
array[999999] = 42;
array[999999] = 42;
ArrayIndexOutOfBoundsException
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nullRef->callMethod();
NullPointerException
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nullRef.callMethod();
Crash!
int y = x / 0;
int y = x / 0;
ArithmeticException
Crash!](https://image.slidesharecdn.com/pangin-crash-dump-131022020117-phpapp01/85/JVM-2-320.jpg)
![Нет, только не это!
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A fatal error has been detected by the Java Runtime Environment:
SIGSEGV (0xb) at pc=0x00002b47f02da0c3, pid=20644, tid=1096538432
JRE version: 6.0_26-b03
Java VM: Java HotSpot(TM) 64-Bit Server VM (20.1-b02 mixed mode linux-amd64)
Problematic frame:
V [libjvm.so+0x8400c3]
An error report file with more information is saved as:
/one/bin/hs_err_pid20644.log
If you would like to submit a bug report, please visit:
http://java.sun.com/webapps/bugreport/crash.jsp](https://image.slidesharecdn.com/pangin-crash-dump-131022020117-phpapp01/85/JVM-4-320.jpg)
![Фрейм
# Problematic frame:
# C [libdiv.so+0x585]
Java_demo1_NativeDiv_div+0x5
адрес инструкции (относительно DLL и символа)
тип фрейма
С
Native C frame
V
VM function
v
VM generated stub
j
Interpreted Java frame
J
Compiled Java frame](https://image.slidesharecdn.com/pangin-crash-dump-131022020117-phpapp01/85/JVM-8-320.jpg)
![Значения регистров
Register to memory mapping:
RAX=0x00000000c5448e8f is an unallocated location in the heap
RBX=0x00000000bd250ff0 is an oop
{method}
- klass: {other class}
RCX=0x0000000000000000 is an unknown value
RDX=0x00000000ffffffff is an unallocated location in the heap
RSP=0x00007f1c2469d798 is pointing into the stack for thread: 0x00007f1c1c009800
RBP=0x00007f1c2469d7f0 is pointing into the stack for thread: 0x00007f1c1c009800
RSI=0x00007f1c2469d800 is pointing into the stack for thread: 0x00007f1c1c009800
RDI=0x00007f1c1c0099e8 is an unknown value
R8 =0x0000c5448e8f8389 is an unknown value
R9 =0x00000850b3941760 is an unknown value
R10=0x00007f1c1901270c is at code_begin+620 in an Interpreter codelet
method entry point (kind = native) [0x00007f1c190124a0, 0x00007f1c19012d00] 2144 bytes
R11=0x00007f1c234de260: <offset 0x8a7260> in libjvm.so at 0x00007f1c22c37000
R12=0x0000000000000000 is an unknown value
R13=0x00000000bd250ff0 is an oop
{method}
- klass: {other class}
R14=0x00007f1c2469d818 is pointing into the stack for thread: 0x00007f1c1c009800
R15=0x00007f1c1c009800 is a thread](https://image.slidesharecdn.com/pangin-crash-dump-131022020117-phpapp01/85/JVM-14-320.jpg)
![Стек
границы стека
Stack: [0x7f1c2459e000,0x7f1c2469f000],
указатель стека
sp=0x7f1c2469d798,
free space=1021k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C [libdiv.so+0x585] Java_demo1_NativeDiv_div+0x5
j demo1.NativeDiv.access$000(II)I+2
смещение в байтах
j demo1.NativeDiv$1.run()V+20
j demo1.NativeDiv.runLoop(ILjava/lang/Runnable;)V+8
j demo1.NativeDiv.main([Ljava/lang/String;)V+21
индекс байткода
v ~StubRoutines::call_stub
V [libjvm.so+0x5f8405] JavaCalls::call_helper()+0x365
V [libjvm.so+0x5f6e68] JavaCalls::call()+0x28
V [libjvm.so+0x62f8d9] jni_invoke_static()+0x219
V [libjvm.so+0x638962] jni_CallStaticVoidMethod+0x162
C [libjli.so+0x36d9] JavaMain+0x7e9
тип фрейма
декодированный адрес
(DLL, символ + смещение)](https://image.slidesharecdn.com/pangin-crash-dump-131022020117-phpapp01/85/JVM-15-320.jpg)
![Потоки
Java Threads: ( => current thread )
0x7f1c1c096000 JavaThread "Service Thread" daemon
[_thread_blocked, id=3910, stack(0x7f1c11c7e000,0x7f1c11d7f000)]
0x7f1c1c093800 JavaThread "C2 CompilerThread1" daemon
[_thread_blocked, id=3909, stack(0x7f1c11d7f000,0x7f1c11e80000)]
0x7f1c1c090800 JavaThread "C2 CompilerThread0" daemon
[_thread_blocked, id=3908, stack(0x7f1c18014000,0x7f1c18115000)]
0x7f1c1c08e800 JavaThread "Signal Dispatcher" daemon
[_thread_blocked, id=3907, stack(0x7f1c18115000,0x7f1c18216000)]
0x7f1c1c06f800 JavaThread "Finalizer" daemon
[_thread_blocked, id=3906, stack(0x7f1c188f9000,0x7f1c189fa000)]
0x7f1c1c06b800 JavaThread "Reference Handler" daemon
[_thread_blocked, id=3905, stack(0x7f1c189fa000,0x7f1c18afb000)]
=>0x7f1c1c009800 JavaThread "main"
[_thread_in_native, id=3899, stack(0x7f1c2459e000,0x7f1c2469f000)]
указатель Thread*
статус
in_java
in_native
in_vm
blocked
trans
thread id
границы стека
тип и название](https://image.slidesharecdn.com/pangin-crash-dump-131022020117-phpapp01/85/JVM-16-320.jpg)
![События компилятора
Compilation events (10 events):
Event: 0.135 Thread 0x7fb4090800
Event: 0.136 Thread 0x7fb4093800
Event: 0.140 Thread 0x7fb4090800
Event: 0.140 Thread 0x7fb4090800
Event: 0.144 Thread 0x7fb4090800
Event: 0.144 Thread 0x7fb4090800
Event: 0.145 Thread 0x7fb4090800
Event: 0.145 Thread 0x7fb4093800
Event: 0.146 Thread 0x7fb4090800
Event: 0.150 Thread 0x7fb4090800
конец
начало
5
6
nmethod
7
nmethod
8
nmethod
nmethod
10 %
nmethod
java.util.Random::nextInt (7 bytes)
demo1.NativeDiv$1::run (28 bytes)
5 0x7fb1060090 code [0x7fb10601e0, 0x7fb10602d8]
java.util.Random::nextInt (60 bytes)
7 0x7fb105fb50 code [0x7fb105fca0, 0x7fb105fe98]
demo1.NativeDiv::access$000 (6 bytes)
8 0x7fb1062290 code [0x7fb10623e0, 0x7fb1062448]
6 0x7fb105f510 code [0x7fb105f680, 0x7fb105f888]
demo1.NativeDiv::runLoop @ 2 (20 bytes)
10% 0x7fb10649d0 code [0x7fb1064b40, 0x7fb1064ec8]
on-stack replacement
границы скомпилированного кода](https://image.slidesharecdn.com/pangin-crash-dump-131022020117-phpapp01/85/JVM-19-320.jpg)
![Карта памяти
Dynamic libraries:
00400000-00401000 r-xp 00000000 08:03 156103
00600000-00601000 rw-p 00000000 08:03 156103
00bc6000-00be7000 rw-p 00000000 00:00 0
7f1bdc000000-7f1bdc021000 rw-p 00000000 00:00
7f1bdc021000-7f1be0000000 ---p 00000000 00:00
7f1c1197b000-7f1c1197c000 r-xp 00000000 00:15
7f1c11b7c000-7f1c11b7d000 rw-p 00001000 00:15
7f1c11b7e000-7f1c11c7e000 rw-p 00000000 00:00
7f1c11c81000-7f1c11d7f000 rw-p 00000000 00:00
7f1c14000000-7f1c14021000 rw-p 00000000 00:00
7f1c14021000-7f1c18000000 ---p 00000000 00:00
7f1c20c45000-7f1c20e02000 r--s 039d3000 08:03
7f1c24494000-7f1c244b6000 r-xp 00000000 08:03
7f1c246b7000-7f1c246b9000 rw-p 00023000 08:03
область памяти
права доступа
read
write
execute
private
shared
/usr/java/jdk1.7.0_40/bin/java
/usr/java/jdk1.7.0_40/bin/java
[heap]
0
0
287
287
0
0
0
0
156934
265734
265734
inode
смещение
в файле
id устройства
(/dev/hda3)
/media/crash/lib/libdiv.so
/media/crash/lib/libdiv.so
[stack:3911]
[stack:3910]
/usr/java/jdk1.7.0_40/jre/lib/rt.jar
/lib/x86_64-linux-gnu/ld-2.15.so
/lib/x86_64-linux-gnu/ld-2.15.so
отображаемый файл](https://image.slidesharecdn.com/pangin-crash-dump-131022020117-phpapp01/85/JVM-21-320.jpg)
Аварийный дамп – чёрный ящик упавшей JVM. Андрей Паньгин
- 1. Аварийный дамп – чёрный ящик упавшей JVM Андрей Паньгин Одноклассники, ведущий инженер
- 2. Java vs. C • Crash! array[999999] = 42; array[999999] = 42; ArrayIndexOutOfBoundsException • nullRef->callMethod(); NullPointerException • nullRef.callMethod(); Crash! int y = x / 0; int y = x / 0; ArithmeticException Crash!
- 4. Нет, только не это! # # # # # # # # # # # # # # # # A fatal error has been detected by the Java Runtime Environment: SIGSEGV (0xb) at pc=0x00002b47f02da0c3, pid=20644, tid=1096538432 JRE version: 6.0_26-b03 Java VM: Java HotSpot(TM) 64-Bit Server VM (20.1-b02 mixed mode linux-amd64) Problematic frame: V [libjvm.so+0x8400c3] An error report file with more information is saved as: /one/bin/hs_err_pid20644.log If you would like to submit a bug report, please visit: http://java.sun.com/webapps/bugreport/crash.jsp
- 5. Фатальные ошибки 1. Проблема в native коде 2. Некорректное использование закрытого API (например, sun.misc.Unsafe) 3. Баг JVM (да, встречали не раз!) 4. Проблема с «железом» (и такое бывало!)
- 6. Сломаем JVM?
- 7. Заголовок # # A fatal error has been detected by the Java Runtime Environment: # # SIGFPE (0x8) at pc=0x00007f1c1197b585, pid=3898, tid=139758846732032 # # JRE version: Java(TM) SE Runtime Environment (7.0_40-b43) (build 1.7.0_40-b43) # Java VM: Java HotSpot(TM) 64-Bit Server VM (24.0-b56 mixed mode linux-amd64 compressed oops) # код сигнала адрес инструкции id процесса id потока сборка JRE и JVM
- 8. Фрейм # Problematic frame: # C [libdiv.so+0x585] Java_demo1_NativeDiv_div+0x5 адрес инструкции (относительно DLL и символа) тип фрейма С Native C frame V VM function v VM generated stub j Interpreted Java frame J Compiled Java frame
- 9. Сигнал siginfo:si_signo=SIGFPE: si_errno=0, si_code=1 (FPE_INTDIV), si_addr=0x00007f1c1197b585 адрес инструкции или обращения к памяти (для SEGV, SIGBUS) код сигнала Linux Windows SIGSEGV EXCEPTION_ACCESS_VIOLATION EXCEPTION_STACK_OVERFLOW SIGBUS EXCEPTION_ACCESS_VIOLATION EXCEPTION_DATATYPE_MISALIGNMENT SEGV_MAPERR отсутствующая страница SEGV_ACCERR нет прав доступа к странице SIGILL EXCEPTION_ILLEGAL_INSTRUCTION EXCEPTION_PRIV_INSTRUCTION BUS_ADRALN невыровненный адрес SIGFPE EXCEPTION_INT_* EXCEPTION_FLT_* BUS_ADRERR несуществующий адрес ILL_ILLOPC неверная инструкция ILL_PRVOPC привилегированная инструкция FPE_INTDIV целочисленное деление на 0 FPE_FLTDIV вещественное деление на 0 причина сигнала
- 10. Регистры CPU Registers: RAX=0x00000000c5448e8f, RSP=0x00007f1c2469d798, R8 =0x0000c5448e8f8389, R12=0x0000000000000000, RIP=0x00007f1c1197b585, RBX=0x00000000bd250ff0, RCX=0x0000000000000000, RDX=0x00000000ffffffff RBP=0x00007f1c2469d7f0, RSI=0x00007f1c2469d800, RDI=0x00007f1c1c0099e8 R9 =0x00000850b3941760, R10=0x00007f1c1901270c, R11=0x00007f1c234de260 R13=0x00000000bd250ff0, R14=0x00007f1c2469d818, R15=0x00007f1c1c009800 EFLAGS=0x0000000000010287, CSGSFS=0x0000000000000033
- 11. Верхушка стека Top of Stack: (sp=0x00007f1c2469d798) 0x00007f1c2469d798: 00007f1c19012738 0x00007f1c2469d7a8: 0000000000000000 0x00007f1c2469d7b8: 0000000000000000 0x00007f1c2469d7c8: 00000000bd251480 0x00007f1c2469d7d8: 00000000bd250ff0 0x00007f1c2469d7e8: 00007f1c2469d810 0x00007f1c2469d7f8: 00007f1c190061d4 0x00007f1c2469d808: 00007f1c1900ecd6 00000000bd1a53e8 00007f1c2469d7b0 00007f1c2469d818 0000000000000000 0000000000000000 00007f1c2469d860 00000000eb64ad68 0000000000000000
- 12. Машинный код Instructions: (pc=0x00007f1c1197b585) 0x00007f1c1197b565: 48 85 c0 74 0e 5d 0x00007f1c1197b575: 1f 40 00 5d c3 90 0x00007f1c1197b585: f7 f9 c3 90 90 90 0x00007f1c1197b595: 48 83 ec 08 48 8b 48 90 90 05 8d 90 90 78 3d 90 90 08 c6 90 90 20 08 90 90 00 20 89 55 48 00 d0 48 83 ff c1 89 f8 e0 fa e5 ff 0f 1f 53 74 до после • Дизассемблер – http://www.onlinedisassembler.com • Описание инструкций – http://www.intel.com/content/www/us/en/processors/ architectures-software-developer-manuals.html
- 14. Значения регистров Register to memory mapping: RAX=0x00000000c5448e8f is an unallocated location in the heap RBX=0x00000000bd250ff0 is an oop {method} - klass: {other class} RCX=0x0000000000000000 is an unknown value RDX=0x00000000ffffffff is an unallocated location in the heap RSP=0x00007f1c2469d798 is pointing into the stack for thread: 0x00007f1c1c009800 RBP=0x00007f1c2469d7f0 is pointing into the stack for thread: 0x00007f1c1c009800 RSI=0x00007f1c2469d800 is pointing into the stack for thread: 0x00007f1c1c009800 RDI=0x00007f1c1c0099e8 is an unknown value R8 =0x0000c5448e8f8389 is an unknown value R9 =0x00000850b3941760 is an unknown value R10=0x00007f1c1901270c is at code_begin+620 in an Interpreter codelet method entry point (kind = native) [0x00007f1c190124a0, 0x00007f1c19012d00] 2144 bytes R11=0x00007f1c234de260: <offset 0x8a7260> in libjvm.so at 0x00007f1c22c37000 R12=0x0000000000000000 is an unknown value R13=0x00000000bd250ff0 is an oop {method} - klass: {other class} R14=0x00007f1c2469d818 is pointing into the stack for thread: 0x00007f1c1c009800 R15=0x00007f1c1c009800 is a thread
- 15. Стек границы стека Stack: [0x7f1c2459e000,0x7f1c2469f000], указатель стека sp=0x7f1c2469d798, free space=1021k Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code) C [libdiv.so+0x585] Java_demo1_NativeDiv_div+0x5 j demo1.NativeDiv.access$000(II)I+2 смещение в байтах j demo1.NativeDiv$1.run()V+20 j demo1.NativeDiv.runLoop(ILjava/lang/Runnable;)V+8 j demo1.NativeDiv.main([Ljava/lang/String;)V+21 индекс байткода v ~StubRoutines::call_stub V [libjvm.so+0x5f8405] JavaCalls::call_helper()+0x365 V [libjvm.so+0x5f6e68] JavaCalls::call()+0x28 V [libjvm.so+0x62f8d9] jni_invoke_static()+0x219 V [libjvm.so+0x638962] jni_CallStaticVoidMethod+0x162 C [libjli.so+0x36d9] JavaMain+0x7e9 тип фрейма декодированный адрес (DLL, символ + смещение)
- 16. Потоки Java Threads: ( => current thread ) 0x7f1c1c096000 JavaThread "Service Thread" daemon [_thread_blocked, id=3910, stack(0x7f1c11c7e000,0x7f1c11d7f000)] 0x7f1c1c093800 JavaThread "C2 CompilerThread1" daemon [_thread_blocked, id=3909, stack(0x7f1c11d7f000,0x7f1c11e80000)] 0x7f1c1c090800 JavaThread "C2 CompilerThread0" daemon [_thread_blocked, id=3908, stack(0x7f1c18014000,0x7f1c18115000)] 0x7f1c1c08e800 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=3907, stack(0x7f1c18115000,0x7f1c18216000)] 0x7f1c1c06f800 JavaThread "Finalizer" daemon [_thread_blocked, id=3906, stack(0x7f1c188f9000,0x7f1c189fa000)] 0x7f1c1c06b800 JavaThread "Reference Handler" daemon [_thread_blocked, id=3905, stack(0x7f1c189fa000,0x7f1c18afb000)] =>0x7f1c1c009800 JavaThread "main" [_thread_in_native, id=3899, stack(0x7f1c2459e000,0x7f1c2469f000)] указатель Thread* статус in_java in_native in_vm blocked trans thread id границы стека тип и название
- 17. Heap Heap PSYoungGen total 18944K, used 327K [0x0eb600000, 0x0ecb00000, 0x100000000) eden space 16384K, 2% used [0x0eb600000,0x0eb651f28,0x0ec600000) from space 2560K, 0% used [0x0ec880000,0x0ec880000,0x0ecb00000) to space 2560K, 0% used [0x0ec600000,0x0ec600000,0x0ec880000) ParOldGen total 41984K, used 0K [0x0c2200000, 0x0c4b00000, 0x0eb600000) object space 41984K, 0% used [0x0c2200000,0x0c2200000,0x0c4b00000) PSPermGen total 21504K, used 2378K [0x0bd000000, 0x0be500000, 0x0c2200000) object space 21504K, 11% used [0x0bd000000,0x0bd2529f0,0x0be500000) текущие границы предел
- 18. Code Cache Code Cache [0x2aaaab977000, 0x2aaaabbe7000, 0x2aaaae977000) total_blobs=701 nmethods=360 adapters=295 free_code_cache=48574272 largest_free_block=20224 nmethods + adapters + stubs свободное место количество скомпилированных методов
- 19. События компилятора Compilation events (10 events): Event: 0.135 Thread 0x7fb4090800 Event: 0.136 Thread 0x7fb4093800 Event: 0.140 Thread 0x7fb4090800 Event: 0.140 Thread 0x7fb4090800 Event: 0.144 Thread 0x7fb4090800 Event: 0.144 Thread 0x7fb4090800 Event: 0.145 Thread 0x7fb4090800 Event: 0.145 Thread 0x7fb4093800 Event: 0.146 Thread 0x7fb4090800 Event: 0.150 Thread 0x7fb4090800 конец начало 5 6 nmethod 7 nmethod 8 nmethod nmethod 10 % nmethod java.util.Random::nextInt (7 bytes) demo1.NativeDiv$1::run (28 bytes) 5 0x7fb1060090 code [0x7fb10601e0, 0x7fb10602d8] java.util.Random::nextInt (60 bytes) 7 0x7fb105fb50 code [0x7fb105fca0, 0x7fb105fe98] demo1.NativeDiv::access$000 (6 bytes) 8 0x7fb1062290 code [0x7fb10623e0, 0x7fb1062448] 6 0x7fb105f510 code [0x7fb105f680, 0x7fb105f888] demo1.NativeDiv::runLoop @ 2 (20 bytes) 10% 0x7fb10649d0 code [0x7fb1064b40, 0x7fb1064ec8] on-stack replacement границы скомпилированного кода
- 20. Прочие события GC Heap History (10 events): Deoptimization events (10 events): Internal exceptions (10 events): Events Event: Event: Event: Event: Event: Event: Event: Event: Event: Event: (10 events): 0.113 loading 0.114 loading 0.114 loading 0.114 loading 0.115 loading 0.115 loading 0.115 loading 0.115 loading 0.119 loading 0.119 loading class class class class class class class class class class 0x7f03b86cb520 0x7f03b86cb520 0x7f03b869aa50 0x7f03b869aa50 0x7f03b8682cd0 0x7f03b8682cd0 0x7f03b8682c70 0x7f03b8682c70 0x7f03b40a6c70 0x7f03b40a6c70 done done done done done
- 21. Карта памяти Dynamic libraries: 00400000-00401000 r-xp 00000000 08:03 156103 00600000-00601000 rw-p 00000000 08:03 156103 00bc6000-00be7000 rw-p 00000000 00:00 0 7f1bdc000000-7f1bdc021000 rw-p 00000000 00:00 7f1bdc021000-7f1be0000000 ---p 00000000 00:00 7f1c1197b000-7f1c1197c000 r-xp 00000000 00:15 7f1c11b7c000-7f1c11b7d000 rw-p 00001000 00:15 7f1c11b7e000-7f1c11c7e000 rw-p 00000000 00:00 7f1c11c81000-7f1c11d7f000 rw-p 00000000 00:00 7f1c14000000-7f1c14021000 rw-p 00000000 00:00 7f1c14021000-7f1c18000000 ---p 00000000 00:00 7f1c20c45000-7f1c20e02000 r--s 039d3000 08:03 7f1c24494000-7f1c244b6000 r-xp 00000000 08:03 7f1c246b7000-7f1c246b9000 rw-p 00023000 08:03 область памяти права доступа read write execute private shared /usr/java/jdk1.7.0_40/bin/java /usr/java/jdk1.7.0_40/bin/java [heap] 0 0 287 287 0 0 0 0 156934 265734 265734 inode смещение в файле id устройства (/dev/hda3) /media/crash/lib/libdiv.so /media/crash/lib/libdiv.so [stack:3911] [stack:3910] /usr/java/jdk1.7.0_40/jre/lib/rt.jar /lib/x86_64-linux-gnu/ld-2.15.so /lib/x86_64-linux-gnu/ld-2.15.so отображаемый файл
- 22. Окружение VM Arguments: jvm_args: -Djava.library.path=/media/crash/lib java_command: demo1.NativeDiv Launcher Type: SUN_STANDARD Environment Variables: PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/java/jdk1.7.0_40/bin USERNAME=root SHELL=/bin/bash DISPLAY=:0
- 24. CPU CPU:total 4 (4 cores per cpu, 1 threads per core) family 6 model 58 stepping 9, cmov, cx8, fxsr, mmx, sse, sse2, sse3, ssse3, tsc /proc/cpuinfo: processor vendor_id cpu family model model name stepping cpu MHz cache size physical id siblings core id cpu cores fpu fpu_exception cpuid level wp flags clflush mmx fxsr sse : 0 : GenuineIntel : 6 : 58 : Intel(R) Core(TM) i7-3517U CPU @ 1.90GHz : 9 : 2369.955 : 6144 KB : 0 : 4 : 0 : 4 : yes : yes : 5 : yes : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 sse2 ht syscall nx rdtscp lm constant_tsc rep_good nopl pni ssse3 lahf_lm
- 26. x86-64 calling convention • http://hg.openjdk.java.net/jdk7/jdk7/hotspot/file/tip/ src/cpu/x86/vm/assembler_x86.hpp JNIEnv* C args c0 jobject this или jclass holder c1 c2 c3 c4 c5 Windows RCX RDX R8 R9 RDI* RSI* Linux RSI RDX RCX R8 R9 j0 j1 j2 j3 j4 RDI Java args j5 * не C arg
- 27. Ошибки бывают у всех
- 28. Настройка отчёта об ошибке • -XX:ErrorFile=./hs_err_pid%p.log • -XX:OnError="cat hs_err_pid%p.log | mail [email protected]" • -XX:+ShowMessageBoxOnError • -XX:+CreateMinidumpOnCrash (только Windows) • -XX:+UseOSErrorReporting • -XX:+SuppressFatalErrorMessage
- 29. Спасибо! • Блог – http://habrahabr.ru/company/odnoklassniki/blog/ • Наш Open Source – https://github.com/odnoklassniki • Контакты – [email protected] • Работа в Одноклассниках – http://v.ok.ru