Identifying crash with hs_err_pid*.log and gdb

Update Sept. 12, 2011

I was able to get the core file and immediately dissabled the instruction that crashed. As per advice I tracked the value of r28 (by the way, no registry entry was log to hs_err_pid*.log) and check where did the value come from (see below w/ <---). However, I was not able to determine the value of r32.

Could the reason for the miss-alignment is that r28 is a 8-byte integer loaded to a 4-byte integer r31?

;;;  1053               if( Transfer( len ) == FALSE ) {
0xc00000000c0c55c0:2 <TFM::PrintTrace(..)+0x32>:        adds         r44=0x480,r32;;  <---
0xc00000000c0c55d0:0 <TFM::PrintTrace(..)+0x40>:        ld8          r43=[ret2]
0xc00000000c0c55d0:1 <TFM::PrintTrace(..)+0x41>:  (p6)  st4          [r35]=ret3
0xc00000000c0c55d0:2 <TFM::PrintTrace(..)+0x42>:        adds         r48=28,r33
0xc00000000c0c55e0:0 <TFM::PrintTrace(..)+0x50>:        mov          ret0=0;;
0xc00000000c0c55e0:1 <TFM::PrintTrace(..)+0x51>:        ld8.c.clr    r62=[r45]
0xc00000000c0c55e0:2 <TFM::PrintTrace(..)+0x52>:        cmp.eq.unc   p6,p1=r0,r62
;;;  1056                       throw MutexLock ;
0xc00000000c0c55f0:0 <TFM::PrintTrace(..)+0x60>:        nop.m        0x0
0xc00000000c0c55f0:1 <TFM::PrintTrace(..)+0x61>:        nop.m        0x0
0xc00000000c0c55f0:2 <TFM::PrintTrace(..)+0x62>:  (p6)  br.cond.dpnt.many _NZ10TFM07PrintTraceEPi+0x800;;
;;;  1057               }
0xc00000000c0c5600:0 <TFM::PrintTrace(..)+0x70>:        adds         r41=0x488,r32
0xc00000000c0c5600:1 <TFM::PrintTrace(..)+0x71>:        adds         r40=0x490,r32
0xc00000000c0c5600:2 <TFM::PrintTrace(..)+0x72>:       br.call.dptk.many rp=0xc00000000c080620;;
;;;  1060               dwDataLen = len ;
0xc00000000c0c5610:0 <TFM::PrintTrace(..)+0x80>:        ld8          r16=[r44]    <---
0xc00000000c0c5610:1 <TFM::PrintTrace(..)+0x81>:        mov          gp=r36
0xc00000000c0c5610:2 <TFM::PrintTrace(..)+0x82>:  (p1)  mov          r62=8;;
0xc00000000c0c5620:0 <TFM::PrintTrace(..)+0x90>:        cmp.eq.unc   p6=r0,r16
0xc00000000c0c5620:1 <TFM::PrintTrace(..)+0x91>:        nop.m        0x0
0xc00000000c0c5620:2 <TFM::PrintTrace(..)+0x92>:  (p6)  br.cond.dpnt.many _NZ10TFM07PrintTraceEPi+0xda0;;
0xc00000000c0c5630:0 <TFM::PrintTrace(..)+0xa0>:        adds         r21=16,r16   <---
0xc00000000c0c5630:1 <TFM::PrintTrace(..)+0xa1>:  (p1)  mov          r62=8;;
0xc00000000c0c5630:2 <TFM::PrintTrace(..)+0xa2>:        nop.i        0x0
0xc00000000c0c5640:0 <TFM::PrintTrace(..)+0xb0>:        ld8          r42=[r21];;  <---
0xc00000000c0c5640:1 <TFM::PrintTrace(..)+0xb1>:        cmp.eq.unc   p6=r0,r42
0xc00000000c0c5640:2 <TFM::PrintTrace(..)+0xb2>:        nop.i        0x0
0xc00000000c0c5650:0 <TFM::PrintTrace(..)+0xc0>:        nop.m        0x0
0xc00000000c0c5650:1 <TFM::PrintTrace(..)+0xc1>:        mov          r47=5
0xc00000000c0c5650:2 <TFM::PrintTrace(..)+0xc2>:  (p6)  br.cond.dpnt.many _NZ10TFM07PrintTraceEPi+0xdf0;;
0xc00000000c0c5660:0 <TFM::PrintTrace(..)+0xd0>:        ld4.a        r27=[r48]
;;;  1064                       if( dwDataLen <= dwViewLen ) {
0xc00000000c0c5660:1 <TFM::PrintTrace(..)+0xd1>:        adds         r28=28,r42   <--
0xc00000000c0c5660:2 <TFM::PrintTrace(..)+0xd2>:        cmp.ne.unc   p6=r0,r46;;
0xc00000000c0c5670:0 <TFM::PrintTrace(..)+0xe0>:        ld4.sa       r26=[r28],
0xc00000000c0c5670:1 <TFM::PrintTrace(..)+0xe1>:  (p6)  ld4          r31=[r28]    <-- instruction that crashed

Let me know if register values are needed. I think I can acquire the register value using info reg command of gdb. This is the result of info registers (I excluded values of prXXX and brXXX), I don't have any idea how to map these to the disassembled instruction above.

  gr1: 0x9fffffffbf716588
  gr2: 0x9fffffff5f667c00
  gr3: 0x9fffffff5f667c00
  gr4: 0x6000000000e0b000开发者_开发知识库
  gr5: 0x9fffffff8adfe2e0
  gr6: 0x9fffffff8ada9000
  gr7: 0x9fffffff8ad7a000
  gr8:                0x1
  gr9: 0x9fffffff8adfd0f0
 gr10:                  0
 gr11: 0xc000000000000690
 gr12: 0x9fffffff8adfd140
 gr13: 0x6000000001681510
 gr14: 0x9fffffffbf7d8e98
 gr15:               0x1a
 gr16: 0x60000000044dac60
 gr17:               0x1f
 gr18:                  0
 gr19: 0x9fffffff8ad023f0
 gr20: 0x9fffffff8adfd0e0
 gr21: 0x60000000044dac70
 gr22: 0x9fffffff5f668000
 gr23:                0xd
 gr24:                0x1
 gr25: 0xc0000000004341f0
 gr26:                NaT
 gr27:               0x63
 gr28: 0xc00000000c5f801c
 gr29: 0xc00000000029db20
 gr30: 0xc00000000029db20
 gr31:              0x288
 gr32: 0x60000000044796d0
 gr33: 0x6000000001a78910
 gr34:               0x7e
 gr35: 0x6000000001d03a90
 gr36: 0x9fffffffbf716588
 gr37: 0xc000000000000c9d
 gr38: 0xc00000000c0c4f70
 gr39:                0x9
 gr40: 0x6000000004479b60
 gr41: 0x6000000004479b58
 gr42: 0xc00000000c5f8000
 gr43: 0x9fffffffbf7144e0
 gr44: 0x6000000004479b50
 gr45: 0x6000000004479b68
 gr46: 0x6000000001d03a90
 gr47:                0x5
 gr48: 0x6000000001a7892c
 gr49: 0x9fffffff8adfe110
 gr50: 0xc000000000000491
 gr51: 0xc00000000c0c5520
 gr52: 0xc00000000c07dd10
 gr53: 0x9fffffff8adfe120
 gr54: 0x9fffffff8adfe0a0
 gr55: 0xc00000000000058e
 gr56: 0xc00000000042be40
 gr57:               0x39
 gr58:                0x3
 gr59:               0x33
 gr60:                  0
 gr61: 0x9fffffffbf7d2598
 gr62:                0x8
 gr63: 0x9fffffffbf716588
 gr64: 0xc000000000000f22
 gr65: 0xc00000000c0c5610

---

This is an update to my previous post. Since I was furnished a copy of the core file, I used gdb to examine the core file and executed the following command:

1) bt

2) frame n <- the frame where the abort occurred

3) disas

And here are the results.

(gdb) bt
#0  0xc0000000001e5350:0 in _lwp_kill+0x30 ()
   from /usr/lib/hpux64/libpthread.so.1
#1  0xc00000000014c7b0:0 in pthread_kill+0x9d0 ()
   from /usr/lib/hpux64/libpthread.so.1
#2  0xc0000000002e4080:0 in raise+0xe0 () from /usr/lib/hpux64/libc.so.1
#3  0xc0000000003f47f0:0 in abort+0x170 () from /usr/lib/hpux64/libc.so.1
#4  0xc00000000e65e0d0:0 in os::abort ()
    at /CLO/Components/JAVA_HOTSPOT/Src/src/os/hp-ux/vm/os_hp-ux.cpp:2033
#5  0xc00000000eb473e0:0 in VMError::report_and_die ()
    at /CLO/Components/JAVA_HOTSPOT/Src/src/share/vm/utilities/vmError.cpp:1008
#6  0xc00000000e66fc90:0 in os::Hpux::JVM_handle_hpux_signal ()
    at /CLO/Components/JAVA_HOTSPOT/Src/src/os_cpu/hp-ux_ia64/vm/os_hp-ux_ia64.cpp:1051
#7  <signal handler called>
#8  0xc00000000c0c5670:1 in TFMTrace::PrintTrace () at tfmtrace.cpp:1064
#9  0xc00000000c0c4f70:0 in FMLogger::WriteLog () at fmlogger.cpp:90
...

(gdb) frame 8
#8  0xc00000000c0c5670:1 in TFMTrace::PrintTrace () at tfmtrace.cpp:1064
1064                            if( dwDataLen <= dwViewLen ) {
Current language:  auto; currently c++

(gdb) disas $pc-16*4 $pc+16*4
...
0xc00000000c0c5660:0 <TFMTrace::PrintTrace(...)+0xd0> :       ld4.a        r27=[r48]        MII,
;;;  1064               if( dwDataLen <= dwViewLen ) {
0xc00000000c0c5660:1 <TFMTrace::PrintTrace(...)+0xd1> :       adds         r28=28,r42
0xc00000000c0c5660:2 <TFMTrace::PrintTrace(...)+0xd2> :        cmp.ne.unc   p6=r0,r46;;
0xc00000000c0c5670:0 <TFMTrace::PrintTrace(...)+0xe0> :        ld4.sa      r26=[r28]        MMI,
0xc00000000c0c5670:1 <TFMTrace::PrintTrace(...)+0xe1> :  (p6)  ld4         r31=[r28]
0xc00000000c0c5670:2 <TFMTrace::PrintTrace(...)+0xe2> :       adds         r46=24,r42;;
0xc00000000c0c5680:0 <TFMTrace::PrintTrace(...)+0xf0> :  (p6)  st4       [r35]=r31         MI,I
0xc00000000c0c5680:1 <TFMTrace::PrintTrace(...)+0xf1> :       adds         r59=36,r42;;
0xc00000000c0c5680:2 <TFMTrace::PrintTrace(...)+0xf2> :        nop.i           0x0
0xc00000000c0c5690:0 <TFMTrace::PrintTrace(...)+0x100>:        ld4.c.clr   r27=[r48]        MIB,
;;;  1066               dwLen = dwTrcLen ;
0xc00000000c0c5690:1 <TFMTrace::PrintTrace(...)+0x101>:       cmp4.eq.unc  p6,p8=99,r27
0xc00000000c0c5690:2 <TFMTrace::PrintTrace(...)+0x102>:        nop.b           0x0;;
0xc00000000c0c56a0:0 <TFMTrace::PrintTrace(...)+0x110>:  (p8)  ld4.c.clr   r26=[r28]        MMI
;;;  1067               }
0xc00000000c0c56a0:1 <TFMTrace::PrintTrace(...)+0x111>:  (p6)  st4       [r48]=r47
0xc00000000c0c56a0:2 <TFMTrace::PrintTrace(...)+0x112>:       cmp4.geu.unc  p7=r26,r27
End of assemb

---

A "normal" crash in native code causes a report like this:

C  [libc.so.6+0x88368]  strstr+0x64a

Note small offset from the function (strstr in this case) to the crash point.

In your case, JVM decided that the address oxc00000000f675671 is inside libtracejni.so, but the closest function it could find is very far from the crash point (0x5065eff9 == 1.2 GB away).

Is your library really that big?

If it really is that big, chances are you have stripped it, and so the symbol _NZ10TFM07PrintTraceEPi doesn't actually have anything to do with the problem (which is in the code that is 1.2GB away).

You need to find out what code was really at address oxc00000000f675671 at the time of the crash. Usually hs_err_pid*.log contains a list of load addresses for all the shared libraries. Find the load address of libtracejni.so, subtract it from pc. That should give you an address similar to 0x400...675671 which you should be able to lookup in your unstripped version of libtracejni.so.

Also note that crash address ends with ASCII "C8G", which may or may not be a coincidence.

Update 2011/08/05.

Now you know which instruction crashed:

0x4000000000099670:1 <TFMTrace::PrintTrace(...)+0xe1>: (p6) ld4         r31=[r28]

This is a load of 4-byte integer from memory pointed by r28.

The next questions are: what is the value of r28 at crash point (should be logged in hs_err*.log), and also where did it come from (complete disassembly of TFM::PrintTrace will tell you that).