x86, bts: add fork and exit handling
commitbf53de907dfdaac178c92d774aae7370d7b97d20
authorMarkus Metzger <markus.t.metzger@intel.com>
Fri, 19 Dec 2008 14:10:24 +0000 (19 15:10 +0100)
committerIngo Molnar <mingo@elte.hu>
Sat, 20 Dec 2008 08:15:46 +0000 (20 09:15 +0100)
tree738a07a8b4b22f7bb8ec2029c9ea9c635db6c62a
parent30cd324e9787ccc9a5ede59742d5409857550692
x86, bts: add fork and exit handling

Impact: introduce new ptrace facility

Add arch_ptrace_untrace() function that is called when the tracer
detaches (either voluntarily or when the tracing task dies);
ptrace_disable() is only called on a voluntary detach.

Add ptrace_fork() and arch_ptrace_fork(). They are called when a
traced task is forked.

Clear DS and BTS related fields on fork.

Release DS resources and reclaim memory in ptrace_untrace(). This
releases resources already when the tracing task dies. We used to do
that when the traced task dies.

Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
arch/x86/include/asm/ds.h
arch/x86/include/asm/ptrace.h
arch/x86/kernel/ds.c
arch/x86/kernel/process_32.c
arch/x86/kernel/process_64.c
arch/x86/kernel/ptrace.c
include/linux/ptrace.h
kernel/fork.c
kernel/ptrace.c