Time Issue on OpenBSD 4.2 with rc.69 (Was: Re: Sparc64 OpenBSD4.1 Compile issue)

[Eric Pancer]

On Fri, 2008-02-08 at 02:57:56 -0500, Carter Bullard proclaimed...

> well, it is a puzzler from way over here.  Since you can run this thing
> in gdb, the fundamental question is what is the size of a
> "struct timeval" and how is it stored in the flow control block.
> It is stored correctly?  Is it copied correctly and then is it packed
> corrrectly when its written out.
> 
> While running argus in gdb(), break in ArgusProcessPacket() and
> printout the size and contents of tvp.
> 
> Be sure and set the ARGUS_DAEMON=yes to no in the /etc/argus.conf
> file, so gdb doesn't lose the focus.

Ok, here's what I came up with. The only issue I had was setting a break at
 2522... the application didn't hit that point, so I had to manually ^C and
set a break further down the chain.

# uname -a
OpenBSD bob 4.2 GENERIC#375 i386
# date
Fri Feb  8 08:56:36 CST 2008
# gdb argus
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This GDB was configured as "i386-unknown-openbsd4.2"...
(gdb) break ArgusProcessPacket
Breakpoint 1 at 0x1c0070dd: file ArgusModeler.c, line 1138.
(gdb) run -w /tmp/test.out
Starting program: /usr/local/argus/sbin/argus -w /tmp/test.out
  ArgusWarning: argus[29867]: 08 Feb 08 08:56:52.605612 started
  ArgusWarning: argus[29867]: 08 Feb 08 08:56:52.606227
ArgusGetInterfaceStatus: interface em0 is up

Breakpoint 1, ArgusProcessPacket (src=0x8411b01c, p=0x862cc012 "", length=178,
    tvp=0x8051d574, type=1) at ArgusModeler.c:1138
1138       struct ArgusModelerStruct *model = src->ArgusModel;
(gdb) print sizeof(*tvp)
$1 = 8
(gdb) print *tvp
$2 = {tv_sec = 1202482612, tv_usec = 606116}
(gdb) break 1297
Breakpoint 2 at 0x1c00789e: file ArgusModeler.c, line 1297.
(gdb) cont
Continuing.

Breakpoint 2, ArgusProcessPacket (src=0x8411b01c, p=0x862cc012 "", length=178,
    tvp=0x8051d574, type=0) at ArgusModeler.c:1297
1297       return (retn);
(gdb) print flow->qhdr
Cannot access memory at address 0x0
(gdb) print model->ArgusGlobalTime
$3 = {tv_sec = 1202482612, tv_usec = 606116}
(gdb) delete
Delete all breakpoints? (y or n) y
(gdb) list ArgusGenerateRecord
2402    */
2403
2404    struct ArgusRecord *
2405    ArgusGenerateRecord (struct ArgusModelerStruct *model, struct
ArgusRecordStruct *rec,
2406                        unsigned char state, struct ArgusRecord *retn)
2407    {
2408
2409       if (rec) {
2410          if (rec->hdr.type & ARGUS_FAR) {
2411             unsigned int ind, dsrindex, *dsrptr;
(gdb) break 2522
Breakpoint 3 at 0x1c00a707: file ArgusModeler.c, line 2522.
(gdb) cont
Continuing.

^C     ### nothing happens here, so i have to ^C to stop the program
Program received signal SIGINT, Interrupt.
0x0d181835 in select () from /usr/lib/libc.so.41.0
(gdb) print *dtime
No symbol "dtime" in current context.
(gdb) delete
Delete all breakpoints? (y or n) y
(gdb) break 2550
Breakpoint 4 at 0x1c00a80a: file ArgusModeler.c, line 2550.
(gdb) cont
Continuing.

Breakpoint 4, ArgusGenerateRecord (model=0x809d601c, rec=0x862d6c38,
    state=0 '\0', retn=0x8b7a306c) at ArgusModeler.c:2550
2550                                        *dsrptr++ =
dtime->src.start.tv_sec;
(gdb) print *dtime
$4 = {hdr = {type = 3 '\003', subtype = 26 '\032', dsr_un = {fl = {
        data = 1304}, vl8 = {qual = 24 '\030', len = 5 '\005'}, vl16 = {
        len = 1304}}}, src = {start = {tv_sec = 1202482616, tv_usec = 732800},
    end = {tv_sec = 1202482639, tv_usec = 921270}}, dst = {start = {
      tv_sec = 0, tv_usec = 0}, end = {tv_sec = 0, tv_usec = 0}}}
(gdb) step
2551                                        *dsrptr++ =
dtime->src.start.tv_usec;
(gdb) step
2552                                        break;
(gdb) step
2546                            for (x = 0; x < 4; x++) {
(gdb) step
2547                               if (subtype & (ARGUS_TIME_SRC_START << x)) {
(gdb) step
2548                                  switch (ARGUS_TIME_SRC_START << x) {


- Eric