Eric Lee / smarc-fsl-linux-kernel

13 Nov, 2013

1 commit

  • 8cbce376e   gcov: move gcov structs definitions to a gcc version specific file ... Browse Code »

    Since also the gcov structures(gcov_info, gcov_fn_info, gcov_ctr_info) can
    change between gcc releases, as shown in gcc 4.7, they cannot be defined
    in a common header and need to be moved to a specific gcc implemention
    file. This also requires to make the gcov_info structure opaque for the
    common code and to introduce simple helpers for accessing data inside
    gcov_info.

    Signed-off-by: Frantisek Hrbata
    Cc: Jan Stancek
    Cc: Kees Cook
    Acked-by: Peter Oberparleiter
    Cc: Rusty Russell
    Cc: Arnd Bergmann
    Cc: Andy Gospodarek
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Frantisek Hrbata
     

19 Jun, 2009

1 commit

  • 2521f2c22   gcov: add gcov profiling infrastructure ... Browse Code »

    Enable the use of GCC's coverage testing tool gcov [1] with the Linux
    kernel. gcov may be useful for:

    * debugging (has this code been reached at all?)
    * test improvement (how do I change my test to cover these lines?)
    * minimizing kernel configurations (do I need this option if the
    associated code is never run?)

    The profiling patch incorporates the following changes:

    * change kbuild to include profiling flags
    * provide functions needed by profiling code
    * present profiling data as files in debugfs

    Note that on some architectures, enabling gcc's profiling option
    "-fprofile-arcs" for the entire kernel may trigger compile/link/
    run-time problems, some of which are caused by toolchain bugs and
    others which require adjustment of architecture code.

    For this reason profiling the entire kernel is initially restricted
    to those architectures for which it is known to work without changes.
    This restriction can be lifted once an architecture has been tested
    and found compatible with gcc's profiling. Profiling of single files
    or directories is still available on all platforms (see config help
    text).

    [1] http://gcc.gnu.org/onlinedocs/gcc/Gcov.html

    Signed-off-by: Peter Oberparleiter
    Cc: Andi Kleen
    Cc: Huang Ying
    Cc: Li Wei
    Cc: Michael Ellerman
    Cc: Ingo Molnar
    Cc: Heiko Carstens
    Cc: Martin Schwidefsky
    Cc: Rusty Russell
    Cc: WANG Cong
    Cc: Sam Ravnborg
    Cc: Jeff Dike
    Cc: Al Viro
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Peter Oberparleiter