in reply to SEGV Handling , srcipt does not exit after SEGV handling

Once the perl interpreter has SEGV'd, it's in a corrupt and inconsistent state. Attempting to execute Perl code at that point (e.g. in a SEGV signal handler) is just likely to lead to more SEGVs, which may be why you're seeing it go into an infinite loop.

Dave.

  • Comment on Re: SEGV Handling , srcipt does not exit after SEGV handling

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Re^2: SEGV Handling , srcipt does not exit after SEGV handling
by Anonymous Monk on Jul 08, 2009 at 12:28 UTC
    Yeah i think this is the case, as the truss output shows segment faults recurring, but the thing is i want to capture the stack trace when this segmentation fault occurs.
[reply]
      If you want a C-level stack trace, then run perl under gdb or similar.

      Dave.

[reply]
        The problem is i want to use this SEGV handler in a separate script to identify the root cause of segment violation. Attaching perl -V 
        perl -V
Summary of my perl5 (revision 5 version 8 subversion 6) configuration:
  Platform:
    osname=solaris, osvers=2.10, archname=i86pc-solaris
    uname='sunos sx86qa2.com 5.10 generic i86pc i386 i86pc '
    config_args=''
    hint=recommended, useposix=true, d_sigaction=define
    usethreads=define use5005threads=undef useithreads=define usemulti
+plicity=define
    useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
    use64bitint=undef use64bitall=undef uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='/proj/lang/SunOS.5.i386/studio-10.0/SUNWspro/bin/cc', ccflags 
+='-DPERL_USE_SAFE_PUTENV -DNO_PERL_PRESERVE_IVUV -D_REENTRANT -I/usr/
+local/include -I/usr/include -I/usr/local/gnu/include -D_LARGEFILE_SO
+URCE -D_FILE_OFFSET_BITS=64',
    optimize='-fast',
    cppflags='-DPERL_USE_SAFE_PUTENV -DNO_PERL_PRESERVE_IVUV -D_REENTR
+ANT -I/usr/local/include -I/usr/include -I/usr/local/gnu/include -D_L
+ARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64'
    ccversion='Sun C 5.7 Patch 117837-03 2005/03/23', gccversion='', g
+ccosandvers=''
    intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=1
+2
    ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t',
+ lseeksize=8
    alignbytes=4, prototype=define
  Linker and Libraries:
    ld='/proj/lang/SunOS.5.i386/studio-10.0/SUNWspro/bin/cc', ldflags 
+='-L/usr/lib -L/lib -L/usr/local/lib -L/usr/local/gnu/lib -L/usr/loca
+l/lib/studio-10.0 '
    libpth=/usr/lib /lib /usr/local/lib /usr/local/gnu/lib /usr/local/
+lib/studio-10.0
    libs=-lsocket -lnsl -lgdbm -ldl -lm -lpthread -lc
    perllibs=-lsocket -lnsl -ldl -lm -lpthread -lc
    libc=/lib/libc.so, so=so, useshrplib=false, libperl=libperl.a
    gnulibc_version=''
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags=' '
    cccdlflags='-KPIC', lddlflags='-G -L/usr/lib -L/lib -L/usr/local/l
+ib -L/usr/local/gnu/lib -L/usr/local/lib/studio-10.0'


Characteristics of this binary (from libperl):
  Compile-time options: MULTIPLICITY USE_ITHREADS USE_LARGE_FILES PERL
+_IMPLICIT_CONTEXT
  Built under solaris
  Compiled at Oct  9 2006 18:03:56
  @INC:
    /usr/local/lib/perl5/5.8.6/i86pc-solaris
    /usr/local/lib/perl5/5.8.6
    /usr/local/lib/perl5/site_perl/5.8.6/i86pc-solaris
    /usr/local/lib/perl5/site_perl/5.8.6
    /prod/tools/packages/lib/perl5/5.8.6/i86pc-solaris
    /prod/tools/packages/lib/perl5/5.8.6

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