I'm observing strace(1) behaving oddly under recent 2.4.x
versions. Under 2.4.27 with uml-patch-2.4.27-1 and strace
4.5.8, we get:
# strace /bin/echo
execve("/bin/echo", ["/bin/echo"], [/* 13 vars */]) = 0
exit_group(0) = ?
which isn't very useful.
Under 2.4.26 + uml-patch-2.4.26-3, the output is as
normal:
# strace /bin/echo
execve("/bin/echo", ["/bin/echo"], [/* 13 vars */]) = 0
uname({sys="Linux", node="vs1", ...}) = 0
brk(0) = 0x804c32c
# etc. etc. etc.
write(1, "\n", 1
) = 1
munmap(0x40018000, 4096) = 0
exit_group(0) = ?
Later versions (e.g. 2.4.29 + uml-patch-2.4.27-1) show the
same behaviour as 2.4.27 above. I haven't looked at the
-bb patches exhaustively yet but certainly the same
problem occurs with uml-2.4.27-bs2-pre6.
Even on the kernels where strace is broken, gdb seems to
work (at least to the extent of being able to set
breakpoints and break on them -- I haven't tested it
extensively).
Has anyone else observed this and looked into it in more
detail?
--
``Because that's where the money is.''
(Willie Sutton, explaining why he robbed banks)
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