JNI, Solaris and Signal 11

There are a number of bugs in the database that have the following attributes:
-JNI
-Solaris
-Signal 11 exceptions.
-Long running applications.
I am experiencing something similar. I was using C threads for some call back functionality (and of course registering it them with JNI.) I was hoping that starting the threads with java would help but it didn't.
I have several questions:
-Has anyone found anything that allows them to work around this? Doesn't matter what you think it was - like a different switch on an application server. I am just curious if anyone thinks they solved it in any way.
-Does anyone have an idea what might cause it? Even an just an idle thought?
-Does anyone have a long running application, that uses JNI on Solaris and they don't experience this (obviously the JVM itself does this, but I am still curious?)
-And slightly different that the above, does anyone have a long running JNI Solaris application using C threads that doesn't have this problem?

jschell, are you still experiencing this?
You may have seen some of my posts before... I have seen many of yours. But I hadn't seen this one until now, by chance.
I am running on Solaris 8 with Java 1.3.1_03 and have a multithreaded C/C++ program that invokes the JVM and makes calls into Java via JNI. Actually, I have a few programs like this, but a particular one is set up to run as a daemon and eventually (after a couple of hours) runs into a segmentation fault (signal 11). The stack in the core file when the program fails shows that a thread started in the native code attempted "AttachCurrentThread()" and then a segfault happens way down in the JVM somewhere. However, I had an issue like this previously and I tracked it down (unexpectedly) to a memory leak in a totally unrelated portion of the native code. So I am trying to find other memory leaks in the code using tools like Rational Purify but it is tricky to get Purify and the JVM to play nicely together.
Additional info: I have all latest patches applied, not using signal handlers, and am using the "alternate" thread library in /usr/lib/lwp.
- I have another similar program on Solaris that does not seem to have this problem.
- The same program that's crashing on Solaris seems to run OK on both Windows and HP-UX.
Given the above, I am pursuing the avenue of a memory corruption in the native code as that has turned out to be the cause of numerous other problems in the past, but I am having a very hard time with this one. jschell (or anyone else), please let me know about your status and what you think.
Thanks -
Chris

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Core Dump on Solaris 10 (Signal 10 - Bus Error), but not on Solaris 8?

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===================
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This GDB was configured as "sparc-sun-solaris2.8"...(no debugging symbols found)
Core was generated by `./warnsrvr'.
Program terminated with signal 10, Bus error.
#0 0x001a3ca8 in __1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__ ()
(gdb) where
#0 0x001a3ca8 in __1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__ ()
#1 0x001a3ca8 in __1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__ ()
Previous frame identical to this frame (corrupt stack?)
======================================
(gdb) disassemble 0x001a3ca8
Dump of assembler code for function __1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__:
0x001a3c24 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+0>: cmp %o0, 1
0x001a3c28 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+4>: be,pn %icc, 0x1a3c38 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+20>
0x001a3c2c <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+8>: sethi %hi(0x572000), %l6
0x001a3c30 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+12>: ret
0x001a3c34 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+16>: restore %g0, 0, %o0
0x001a3c38 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+20>: ld [ %l6 + 0x358 ], %l5
0x001a3c3c <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+24>: cmp %l5, 0
0x001a3c40 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+28>: bne,pn %icc, 0x1a3c50 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+44>
0x001a3c44 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+32>: cmp %l5, 1
0x001a3c48 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+36>: ret
0x001a3c4c <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+40>: restore %g0, 1, %o0
0x001a3c50 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+44>: bne,pn %icc, 0x1a3cb0 <__1cSWPReferenceManagerOInputIonoModel6MrknKIONO_MODEL_khki_nGRESULT__+4>
0x001a3c54 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+48>: sethi %hi(0x1a3c00), %l7
0x001a3c58 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+52>: mov -1, %i1
0x001a3c5c <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+56>: sth %i1, [ %fp + -1864 ]
0x001a3c60 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+60>: add %fp, -1824, %o0
0x001a3c64 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+64>: ldd [ %l7 + 8 ], %f0
0x001a3c68 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+68>: call 0x1c87f0 <___const_seg_900001301+16>
0x001a3c6c <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+72>: std %f0, [ %fp + -1856 ]
0x001a3c70 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+76>: call 0x1cf888 <__1cKIono2Ascii6FrknKIONO_MODEL_pcki_v_+100>
0x001a3c74 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+80>: add %fp, -1864, %o0
0x001a3c78 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+84>: sllx %i2, 0x30, %o1
0x001a3c7c <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+88>: mov %i0, %o0
0x001a3c80 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+92>: srax %o1, 0x30, %o1
0x001a3c84 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+96>: call 0x182cb0 <__1cTGenReferenceManagerOGetCorrections6MrknKCLSGpsTime_rknICLSCoord_rnOCORRECTION_SET__nGRESULT__+3504>
0x001a3c88 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+100>: add %fp, -1864, %o2
0x001a3c8c <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+104>: cmp %o0, 1
0x001a3c90 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+108>: be,pn %icc, 0x1a3ca0 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+124>
0x001a3c94 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+112>: mov %i0, %o0
0x001a3c98 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+116>: ret
0x001a3c9c <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+120>: restore %g0, 0, %o0
0x001a3ca0 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+124>: call 0x1a7068 <__1cSWPReferenceManagerPAdjustXTRATimes6MpnZCLSGnssSatellitePredictor_khrnKCLSGpsTime_rd_nGRESULT__+3584>
0x001a3ca4 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+128>: add %fp, -1864, %o1
0x001a3ca8 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+132>: ret
End of assembler dump.
=====================================
(gdb) info registers
g0 0x0 0
g1 0xfd77ecb8 -42472264
g2 0x11 17
g3 0xecf0 60656
g4 0xfd77e304 -42474748
g5 0xfc 252
g6 0x0 0
g7 0xfeda4200 -19250688
o0 0x1 1
o1 0x20 32
o2 0x693500 6894848
o3 0xecf0 60656
o4 0x6a21f0 6955504
o5 0x1 1
sp 0xfd77ec38 0xfd77ec38
o7 0x1a3ca0 1719456
l0 0x1b000021 452984865
l1 0x2ca2a40 46803520
l2 0x40173076 1075261558
l3 0x57d22e16 1473392150
l4 0x3fa80492 1067975826
l5 0x3c06fe49 1007091273
l6 0x4072b4a5 1081259173
l7 0x410d711d 1091399965
i0 0x421c0000 1109131264
i1 0xffffffff -1
i2 0x1d000018 486539288
i3 0x2ca2808 46802952
i4 0x40138e4a 1075023434
i5 0x8b122e16 -1961742826
fp 0xbfb17c3b 0xbfb17c3b
i7 0xa817f0db -1474826021
y 0x3 3
psr 0xfe401007 -29356025
wim 0x0 0
tbr 0x0 0
pc 0x1a3ca8 0x1a3ca8 <__1cSWPReferenceManagerMInputUtcInfo6MrknIUTC_INFO_khki_nGRESULT__+132>
npc 0x1a3cac 0x1a3cac <__1cSWPReferenceManagerOInputIonoModel6MrknKIONO_MODEL_khki_nGRESULT__>
fsr 0x400420 4195360
csr 0x0 0

Why difference in Solaris and Linux

Hi,
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Why it is so.
here is the code:
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Hi,
The following program is giving results diferently
when I am executing using g++ compiler in Solaris
and Linux.
Why it is so.
here is the code:
#include <stdio.h>
#include <string.h>
#include <malloc.h>
#include <stdlib.h>
int main( void )
size_t size;
char *buf;
if ( ( buf = (char *)malloc(10 *sizeof(char))) == NULL)
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There is no portable way to find out the number of bytes allocated on the heap if you are give only a pointer to the memory. You have to remember the size some other way..
strcpy(buf, "HelloWorld");A literal string consists of the characters in the string plus a terminating null, all of which are copied by strcpy. You allocated 10 chars for buf, but are writing 11 chars into it. At this point, the program has undefined behavior. Literally anything at all could happen, because you can't predict the effect of writing outside the bounds of allocated memory.
printf("\n Address is : %u String is : %s size :
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printf("\n Address is : %u String is : %s\n", buf, buf);
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This question was solved.
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Link to picture
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Moderator note; picture(s) totalling >50K converted to link(s) Forum Rules

hi adilsefaersan,
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>
>
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