[Bug libc/11610] _init/_fini do not have proper unwinding information on x86_64 and i686

["ppluzhnikov at google dot com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=11610

Paul Pluzhnikov <ppluzhnikov at google dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|                            |ppluzhnikov at google dot
                   |                            |com
         AssignedTo|drepper.fsp at gmail dot    |ppluzhnikov at google dot
                   |com                         |com
            Summary|_fini does not have proper  |_init/_fini do not have
                   |unwinding information on    |proper unwinding
                   |x86_64                      |information on x86_64 and
                   |                            |i686

--- Comment #2 from Paul Pluzhnikov <ppluzhnikov at google dot com> 2012-10-26 21:30:20 UTC ---
This has just bit me as well.

The proposed patch no longer works, as initfini.c has been replaced with
sysdeps/x86_64/crti.S and sysdeps/i386/crti.S

The same problem now exists on i686 as well.

This is not just a GDB problem either: if I dlopen a library in a try/catch,
and the library ctor throws, that throw is not caught:

// g++ -g main.cc -ldl
#include <dlfcn.h>
#include <stdio.h>

int main(int argc, char *argv[])
{
  try {
    void *h = dlopen("./foo.so", RTLD_LAZY);
  } catch (...) {
    fprintf(stderr, "got exception\n");
    return 1;
  }
  return 0;
}

// g++ -g -fPIC -shared -o foo.so foo.cc
#include <stdio.h>

static void __attribute__((constructor))
foo(void)
{
  fprintf(stderr, "in foo\n");
  throw 1;
}


./a.out
in foo
terminate called after throwing an instance of 'int'
Aborted


I'll send a new patch to libc-alpha.

-- 
Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.