• Markus Metzger's avatar
    x86, bts: add fork and exit handling · bf53de90
    Markus Metzger authored
    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: default avatarMarkus Metzger <markus.t.metzger@intel.com>
    Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
fork.c 41.4 KB