Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!usc!ucla-cs!uci-ics!nagel
From: nagel@ics.uci.edu (Mark Nagel)
Newsgroups: gnu.gdb.bug
Subject: Re: bug in gdb 3.3 on iPSC/2
Message-ID: <1989Oct28.102328.2415@paris.ics.uci.edu>
Date: 28 Oct 89 17:23:28 GMT
References: <616@wang.UUCP> <8910271528.AA07038@hobbes.ai.mit.edu>
Distribution: gnu
Lines: 25

kingdon@ai.mit.edu (Jim Kingdon) writes:


>    [GDB cannot find number of arguments for main on i386 because
>    FRAME_CHAIN_VALID doesn't allow get_prev_frame_info to go into
>    start.]

>I fixed this in the working GDB (i.e. the fix will be in the next
>release) by just not having FRAME_NUM_ARGS return the number of
>arguments (i.e. return -1) when get_prev_frame_info returns 0.  This
>is pretty much harmless because main is not a varadic function, so if
>you have debugging symbols GDB will know how many arguments it has
>from the debugging symbols.  If someone wants to see all 3 arguments
>to main, no matter how it is declared in the source, it would require
>something like a really_get_prev_frame_info in addition to
>get_prev_frame_info.

I applied this fix to FRAME_NUM_ARGS and gdb works fine now (except
for that unknown symbol type, but that's minor).  Thanks a lot for
the help!
--
Mark Nagel
UC Irvine Department of ICS   +----------------------------------------+
ARPA: nagel@ics.uci.edu       | radiation: smog with an attitude       |
UUCP: ucbvax!ucivax!nagel     +----------------------------------------+