[Bug libfortran/33905] New: show_backtrace hangs on SIGSEGV in malloc/free

["toon at moene dot indiv dot nluug dot nl" <gcc-bugzilla at gcc dot gnu dot org>]

The current implementation of show_backtrace hangs on a mutex lock in the
malloc/free routines when a segmentation fault due to corruption of the
malloc/free administration happens to trigger the backtrace.

There is an alternative implementation using a temporary file to store the
translation of address -> symbol name that doesn't malloc storage (see 'man
backtrace').

A work around is to force the hanging process to the background and using the
"attach" functionality of gdb to force a backtrace with the "where" command.


-- 
           Summary: show_backtrace hangs on SIGSEGV in malloc/free
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: libfortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: toon at moene dot indiv dot nluug dot nl


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33905