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    Subject[Patch 3/5] doc: move the scripts in gcov.txt to tools/gcov/

    Move the two bash scripts in gcov.txt into tools/gcov/,
    so that we can use them directly.

    Signed-off-by: WANG Cong <amwang@redhat.com>

    ---
    Index: linux-2.6/Documentation/gcov.txt
    ===================================================================
    --- linux-2.6.orig/Documentation/gcov.txt
    +++ linux-2.6/Documentation/gcov.txt
    @@ -8,8 +8,6 @@ Using gcov with the Linux kernel
    5. Modules
    6. Separated build and test machines
    7. Troubleshooting
    -Appendix A: sample script: gather_on_build.sh
    -Appendix B: sample script: gather_on_test.sh


    1. Introduction
    @@ -155,6 +153,8 @@ exact same file system location on the t
    machine. If any of the path components is symbolic link, the actual
    directory needs to be used instead (due to make's CURDIR handling).

    +Try tools/gcov/gather_on_build.sh.
    +
    b) gcov is run on the BUILD machine

    The following files need to be copied after each test case from test
    @@ -167,6 +167,8 @@ from the gcov directory in sysfs:
    These files can be copied to any location on the build machine. gcov
    must then be called with the -o option pointing to that directory.

    +Try tools/gcov/gather_on_test.sh.
    +
    Example directory setup on the build machine:

    /tmp/linux: kernel source tree
    @@ -192,62 +194,6 @@ Problem: Files copied from sysfs appear
    Cause: Due to the way seq_file works, some tools such as cp or tar
    may not correctly copy files from sysfs.
    Solution: Use 'cat' to read .gcda files and 'cp -d' to copy links.
    - Alternatively use the mechanism shown in Appendix B.
    -
    -
    -Appendix A: gather_on_build.sh
    -==============================
    -
    -Sample script to gather coverage meta files on the build machine
    -(see 6a):
    -#!/bin/bash
    -
    -KSRC=$1
    -KOBJ=$2
    -DEST=$3
    -
    -if [ -z "$KSRC" ] || [ -z "$KOBJ" ] || [ -z "$DEST" ]; then
    - echo "Usage: $0 <ksrc directory> <kobj directory> <output.tar.gz>" >&2
    - exit 1
    -fi
    -
    -KSRC=$(cd $KSRC; printf "all:\n\t@echo \${CURDIR}\n" | make -f -)
    -KOBJ=$(cd $KOBJ; printf "all:\n\t@echo \${CURDIR}\n" | make -f -)
    -
    -find $KSRC $KOBJ \( -name '*.gcno' -o -name '*.[ch]' -o -type l \) -a \
    - -perm /u+r,g+r | tar cfz $DEST -P -T -
    -
    -if [ $? -eq 0 ] ; then
    - echo "$DEST successfully created, copy to test system and unpack with:"
    - echo " tar xfz $DEST -P"
    -else
    - echo "Could not create file $DEST"
    -fi
    -
    -
    -Appendix B: gather_on_test.sh
    -=============================
    -
    -Sample script to gather coverage data files on the test machine
    -(see 6b):
    -
    -#!/bin/bash -e
    -
    -DEST=$1
    -GCDA=/sys/kernel/debug/gcov
    -
    -if [ -z "$DEST" ] ; then
    - echo "Usage: $0 <output.tar.gz>" >&2
    - exit 1
    -fi
    -
    -TEMPDIR=$(mktemp -d)
    -echo Collecting data..
    -find $GCDA -type d -exec mkdir -p $TEMPDIR/\{\} \;
    -find $GCDA -name '*.gcda' -exec sh -c 'cat < $0 > '$TEMPDIR'/$0' {} \;
    -find $GCDA -name '*.gcno' -exec sh -c 'cp -d $0 '$TEMPDIR'/$0' {} \;
    -tar czf $DEST -C $TEMPDIR sys
    -rm -rf $TEMPDIR
    + Alternatively use the mechanism shown in
    + tools/gcov/gather_on_test.sh.

    -echo "$DEST successfully created, copy to build system and unpack with:"
    -echo " tar xfz $DEST"
    Index: linux-2.6/tools/gcov/gather_on_build.sh
    ===================================================================
    --- /dev/null
    +++ linux-2.6/tools/gcov/gather_on_build.sh
    @@ -0,0 +1,24 @@
    +#!/bin/bash
    +
    +KSRC=$1
    +KOBJ=$2
    +DEST=$3
    +
    +if [ -z "$KSRC" ] || [ -z "$KOBJ" ] || [ -z "$DEST" ]; then
    + echo "Usage: $0 <ksrc directory> <kobj directory> <output.tar.gz>" >&2
    + exit 1
    +fi
    +
    +KSRC=$(cd $KSRC; printf "all:\n\t@echo \${CURDIR}\n" | make -f -)
    +KOBJ=$(cd $KOBJ; printf "all:\n\t@echo \${CURDIR}\n" | make -f -)
    +
    +find $KSRC $KOBJ \( -name '*.gcno' -o -name '*.[ch]' -o -type l \) -a \
    + -perm /u+r,g+r | tar cfz $DEST -P -T -
    +
    +if [ $? -eq 0 ] ; then
    + echo "$DEST successfully created, copy to test system and unpack with:"
    + echo " tar xfz $DEST -P"
    +else
    + echo "Could not create file $DEST"
    +fi
    +
    Index: linux-2.6/tools/gcov/gather_on_test.sh
    ===================================================================
    --- /dev/null
    +++ linux-2.6/tools/gcov/gather_on_test.sh
    @@ -0,0 +1,20 @@
    +#!/bin/bash -e
    +
    +DEST=$1
    +GCDA=/sys/kernel/debug/gcov
    +
    +if [ -z "$DEST" ] ; then
    + echo "Usage: $0 <output.tar.gz>" >&2
    + exit 1
    +fi
    +
    +TEMPDIR=$(mktemp -d)
    +echo Collecting data..
    +find $GCDA -type d -exec mkdir -p $TEMPDIR/\{\} \;
    +find $GCDA -name '*.gcda' -exec sh -c 'cat < $0 > '$TEMPDIR'/$0' {} \;
    +find $GCDA -name '*.gcno' -exec sh -c 'cp -d $0 '$TEMPDIR'/$0' {} \;
    +tar czf $DEST -C $TEMPDIR sys
    +rm -rf $TEMPDIR
    +
    +echo "$DEST successfully created, copy to build system and unpack with:"
    +echo " tar xfz $DEST"

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