Eric Lee / smarc-fsl-linux-kernel

05 Feb, 2016

1 commit

  • 598b7c691   perf jit: add source line info support ... Browse Code ยป

    This patch adds source line information support to perf for jitted code.

    The source line info must be emitted by the runtime, such as JVMTI.

    Perf injects extract the source line info from the jitdump file and adds
    the corresponding .debug_lines section in the ELF image generated for
    each jitted function.

    The source line enables matching any address in the profile with a
    source file and line number.

    The improvement is visible in perf annotate with the source code
    displayed alongside the assembly code.

    The dwarf code leverages the support from OProfile which is also
    released under GPLv2. Copyright 2007 OProfile authors.

    Signed-off-by: Stephane Eranian
    Cc: Adrian Hunter
    Cc: Andi Kleen
    Cc: Carl Love
    Cc: David Ahern
    Cc: Jiri Olsa
    Cc: John McCutchan
    Cc: Namhyung Kim
    Cc: Pawel Moll
    Cc: Peter Zijlstra
    Cc: Sonny Rao
    Cc: Sukadev Bhattiprolu
    Link: http://lkml.kernel.org/r/1448874143-7269-5-git-send-email-eranian@google.com
    Signed-off-by: Arnaldo Carvalho de Melo

    Stephane Eranian