• Jiri Olsa's avatar
    perf tests: Test breakpoint overflow signal handler · 5a6bef47
    Jiri Olsa authored
    Adding automated test for breakpoint event signal handler checking if
    it's executed properly.
    
    The test is related to the proper handling of the RF EFLAGS bit on
    x86_64, but it's generic for all archs.
    
    First we check the signal handler is properly called and that the
    following debug exception return to user space wouldn't trigger
    recursive breakpoint.
    
    This is related to x86_64 RF EFLAGS bit being managed in a wrong way.
    
    Second we check that we can set breakpoint in signal handler, which is
    not possible on x86_64 if the signal handler is executed with RF EFLAG
    set.
    
    This test is inpired by overflow tests done by Vince Weaver.
    Signed-off-by: default avatarJiri Olsa <jolsa@redhat.com>
    Cc: "H. Peter Anvin" <hpa@zytor.com>
    Cc: Andi Kleen <andi@firstfloor.org>
    Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
    Cc: Frederic Weisbecker <fweisbec@gmail.com>
    Cc: H. Peter Anvin <hpa@zytor.com>
    Cc: Ingo Molnar <mingo@elte.hu>
    Cc: Oleg Nesterov <oleg@redhat.com>
    Cc: Paul Mackerras <paulus@samba.org>
    Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Cc: Stephane Eranian <eranian@google.com>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Vince Weaver <vincent.weaver@maine.edu>
    Link: http://lkml.kernel.org/r/1362940871-24486-6-git-send-email-jolsa@redhat.com
    [ committer note: s/pr_err/pr_debug/g i.e. print just OK or FAILED in non verbose mode ]
    Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    5a6bef47
tests.h 649 Bytes