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Archived Forum PostQuestion:
I using chilkat library in my C++ program, it compile correctly but while running the program it crash in Linux even it works fine with windows.
I am trying to trace it on valgrind and after execution of some command it shows below error log:
==6428== Thread 2:
==6428== Invalid read of size 1
==6428== at 0x313362: _IO_file_underflow@@GLIBC_2.1 (in /lib/libc-2.12.so)
==6428== by 0x31504A: _IO_default_uflow (in /lib/libc-2.12.so)
==6428== by 0x316659: __uflow (in /lib/libc-2.12.so)
==6428== by 0x30904B: _IO_getline_info (in /lib/libc-2.12.so)
==6428== by 0x308F90: _IO_getline (in /lib/libc-2.12.so)
==6428== by 0x311FB0: fgets_unlocked (in /lib/libc-2.12.so)
==6428== by 0x402D736: _nss_files_getpwuid_r (in /lib/libnss_files-2.12.so)
==6428== by 0x844C1CC: getpwuid_r (in /u/shanr/workplace/perfstat_build_chilkat/perfstat8)
==6428== by 0x844CE02: __getlogin_r_loginuid (in /u/shanr/workplace/perfstat_build_chilkat/perfstat8)
==6428== by 0x844CB09: getlogin (in /u/shanr/workplace/perfstat_build_chilkat/perfstat8)
==6428== by 0x82A6E6B: Psdk::getUsername(StringBuffer&) (in /u/shanr/workplace/perfstat_build_chilkat/perfstat8)
==6428== by 0x822F60F: ClsBase::logProgrammingLanguage2(LogBase&) (in /u/shanr/workplace/perfstat_build_chilkat/perfstat8)
==6428== Address 0x0 is not stack'd, malloc'd or (recently) free'd
==6428==
==6428==
==6428== Process terminating with default action of signal 11 (SIGSEGV)
==6428== Access not within mapped region at address 0x0
==6428== at 0x313362: _IO_file_underflow@@GLIBC_2.1 (in /lib/libc-2.12.so)
==6428== by 0x31504A: _IO_default_uflow (in /lib/libc-2.12.so)
==6428== by 0x316659: __uflow (in /lib/libc-2.12.so)
==6428== by 0x30904B: _IO_getline_info (in /lib/libc-2.12.so)
==6428== by 0x308F90: _IO_getline (in /lib/libc-2.12.so)
==6428== by 0x311FB0: fgets_unlocked (in /lib/libc-2.12.so)
==6428== by 0x402D736: _nss_files_getpwuid_r (in /lib/libnss_files-2.12.so)
==6428== by 0x844C1CC: getpwuid_r (in /u/shanr/workplace/perfstat_build_chilkat/perfstat8)
==6428== by 0x844CE02: __getlogin_r_loginuid (in /u/shanr/workplace/perfstat_build_chilkat/perfstat8)
==6428== by 0x844CB09: getlogin (in /u/shanr/workplace/perfstat_build_chilkat/perfstat8)
==6428== by 0x82A6E6B: Psdk::getUsername(StringBuffer&) (in /u/shanr/workplace/perfstat_build_chilkat/perfstat8)
==6428== by 0x822F60F: ClsBase::logProgrammingLanguage2(LogBase&) (in /u/shanr/workplace/perfstat_build_chilkat/perfstat8)
==6428== If you believe this happened as a result of a stack
==6428== overflow in your program's main thread (unlikely but
==6428== possible), you can try to increase the size of the
==6428== main thread stack using the --main-stacksize= flag.
==6428== The main thread stack size used in this run was 10485760.
==6428==
==6428== HEAP SUMMARY:
==6428== in use at exit: 0 bytes in 0 blocks
==6428== total heap usage: 0 allocs, 0 frees, 0 bytes allocated
==6428==
==6428== All heap blocks were freed -- no leaks are possible
==6428==
==6428== For counts of detected and suppressed errors, rerun with: -v
==6428== Use --track-origins=yes to see where uninitialised values come from
==6428== ERROR SUMMARY: 786543 errors from 444 contexts (suppressed: 14 from 4)
I dont understand. I tried to get some information about ClsBase::logProgrammingLanguage2(LogBase&) but fail. help me.
Maybe the problem has to do with your extremely old version of libc (v2.12). Chilkat provides an older build that uses libc 2.3.4. See the Linux C++ lib downloads at http://www.chilkatsoft.com/chilkatLinux.asp
Also, Chilkat version 9.4.0 was released today, so you might try downloading this new version to see if it makes a difference.