bin/39722: ktruss(1) broken for program running under compat (linux,...)

[njoly%pasteur.fr@localhost]

>Number:         39722
>Category:       bin
>Synopsis:       ktruss(1) broken for program running under compat (linux,...)
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Oct 09 12:45:00 +0000 2008
>Originator:     Nicolas Joly
>Release:        NetBSD 4.99.72
>Organization:
Biological Software and Databanks.
Institut Pasteur, Paris.
>Environment:
System: NetBSD lanfeust.sis.pasteur.fr 4.99.72 NetBSD 4.99.72 (LANFEUST_DEVEL) 
#4: Thu Oct 9 13:34:36 CEST 2008 
njoly%lanfeust.sis.pasteur.fr@localhost:/local/src/NetBSD/obj.amd64/sys/arch/amd64/compile/LANFEUST_DEVEL
 amd64
Architecture: x86_64
Machine: amd64
>Description:
ktruss(1) does not seems to handle gracefully multiple NAMI entries,
which occurs frequently with programs running under compat; such as
linux binaries.

ktruss output:
  7590      1 id       emul(linux)
  7590      1 id       execve("/emul/linux/usr/bin/id", 0x7f7fffffda98, 
0x7f7fffffdaa8) JUSTRETURN
  7590      1 id       uname(0x7f7ffffff138)       = 0
  7590      1 id       brk("/emul/linux")          = 5263360
  7590      1 id       mmap("/emul/linux/lib64/ld-linux-x86-64.so.2", 0x1000, 
0x3, 0x22, 0xffffffff, 0) = 140187698982912
  7590      1 id       access(0x7f7ffde11450, 0x4) JUSTRETURN
  7590      1 id       open(0x7f7ffde131d8, 0, 0x1) = 3
  7590      1 id       fstat64("/emul/linux/etc/ld.so.preload", 0x7f7fffffe928) 
= 0
  7590      1 id       mmap("/etc/ld.so.preload", 
"/emul/linux/etc/ld.so.cache", 0x1, 0x2, 0x3, 0) = 140187698966528
  7590      1 id       close(0x3)                  = 0
[...]

ktrace/kdump output:
  7682      1 ktrace   CALL  execve(0x7f7ffffffca3,0x7f7fffffda98,0x7f7fffffdaa8
)
  7682      1 ktrace   NAMI  "/emul/linux/usr/bin/id"
  7682      1 ktrace   NAMI  "/emul/linux"
  7682      1 ktrace   NAMI  "/emul/linux/lib64/ld-linux-x86-64.so.2"
  7682      1 id       EMUL  "linux"
  7682      1 id       RET   syscall -1 errno -2 No such file or directory
  7682      1 id       CALL  uname(0x7f7ffffff138)
  7682      1 id       RET   uname 0
  7682      1 id       CALL  brk(0)
  7682      1 id       RET   brk 5263360/0x505000
  7682      1 id       CALL  mmap(0,0x1000,3,0x22,0xffffffff,0)
  7682      1 id       RET   mmap 140187698982912/0x7f7ffdfff000
  7682      1 id       CALL  access(0x7f7ffde11450,4)
  7682      1 id       NAMI  "/emul/linux/etc/ld.so.preload"
  7682      1 id       NAMI  "/etc/ld.so.preload"
  7682      1 id       RET   access -1 errno -2 No such file or directory
  7682      1 id       CALL  open(0x7f7ffde131d8,0,1)
  7682      1 id       NAMI  "/emul/linux/etc/ld.so.cache"
  7682      1 id       RET   open 3
  7682      1 id       CALL  fstat64(3,0x7f7fffffe928)
  7682      1 id       RET   fstat64 0
  7682      1 id       CALL  mmap(0,0x3236,1,2,3,0)
  7682      1 id       RET   mmap 140187698966528/0x7f7ffdffb000
  7682      1 id       CALL  close(3)
  7682      1 id       RET   close 0
[...]

>How-To-Repeat:
Compare ktruss and ktrace/kdump output for binaries running under compat.
>Fix: