gdb4.7 botches(?)

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2 total messages Started by Robert R. Henry Tue, 27 Oct 1992 22:54

#10

Author: Robert R. Henry
Date: Tue, 27 Oct 1992 22:54

17 lines
1198 bytes

In gdb4.7 (sparc target, sparc host),
built to run with gcc2.2.2 with some modifications to dbxout.c,
I note these problems.

1:  Inside of a member function, the class members are not implicitly reachable;
instead of saying "print x", one must say "print this->x".
Is this a bug or a feature?

2:  I can not put a breakpoint on the destructor for Thing,
eg on Thing::~Thing; the breakpoint ends up on the constructor Thing::Thing
instead.  This may be because my name mangling configuration
(both in gcc2.2.2/dbxout.c and in gdb4.7(GCC_MANGLE_BUG)) may be
screwed up.  (My version of gcc2.2.2/dbxout.c has undergone several
patches from the net, as well as gdb/gcc.patch)

3: othergdb4.7 users on site who are debugging big programs complain that
'where' takes several minutes to complete.

gdb 4.7 coredump

#25

Author: Alexander Klaiber
Date: Thu, 29 Oct 1992 22:58

21 lines
1499 bytes

line 238 in "infcmd.c" reads
          printf_filtered ("Starting program: %s %s\n",
                  exec_file? exec_file: "", inferior_args);

although the restrictions on {printf_filtered} clearly state strict size
limitations on the string to be printed.  If the args corresponding to the "%s"s in
the format are long strings (e.g. over 255 chars, which happens easily if you have
long pathnames as arguments), gdb will corrupt its stack and die.  

FIX: use {fputs_filtered} and "manually" print each argument:

      fputs_filtered("Starting program: ", stdout);
      if (exec_file) fputs_filtered(exec_file, stdout);
      fputs_filtered(" ", stdout);
      fputs_filtered(inferior_args, stdout);
      fputs_filtered("\n", stdout);

Or do what older versions of gdb used to do (up to 4.7), namely just use
{printf} instead of {printf_filtered}.  Or someone could fix {vfprintf_filtered}...

	Alex

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