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scripts/faddr2line: make the new code listing format optional 

Commit 6870c0165f ("scripts/faddr2line: show the code context")
radically altered the output format of the faddr2line tool.  And while
the new list output format might have merit it broke my vim usage and
was hard to read.

Make the new format optional; using a '--list' argument and attempt to
make the output slightly easier to read by adding a little whitespace to
separate the different files and explicitly mark the line in question.

Cc: Changbin Du <changbin.du@intel.com>
Fixes: 6870c0165f ("scripts/faddr2line: show the code context")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Peter Zijlstra (Intel) 2018-06-04 13:48:31 -05:00 committed by Linus Torvalds
parent 29dcea8877
commit 689135f0ed
1 changed files with 16 additions and 2 deletions
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18
scripts/faddr2line
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@ -56,7 +56,7 @@ command -v ${SIZE} >/dev/null 2>&1 || die "size isn't installed"
command -v ${NM} >/dev/null 2>&1 || die "nm isn't installed"
usage() {
echo "usage: faddr2line <object file> <func+offset> <func+offset>..." >&2
echo "usage: faddr2line [--list] <object file> <func+offset> <func+offset>..." >&2
exit 1
}
@ -166,15 +166,25 @@ __faddr2line() {
local file_lines=$(${ADDR2LINE} -fpie $objfile $addr | sed "s; $dir_prefix\(\./\)*; ;")
[[ -z $file_lines ]] && return
if [[ $LIST = 0 ]]; then
echo "$file_lines" | while read -r line
do
echo $line
done
DONE=1;
return
fi
# show each line with context
echo "$file_lines" | while read -r line
do
echo
echo $line
n=$(echo $line | sed 's/.*:\([0-9]\+\).*/\1/g')
n1=$[$n-5]
n2=$[$n+5]
f=$(echo $line | sed 's/.*at \(.\+\):.*/\1/g')
awk 'NR>=strtonum("'$n1'") && NR<=strtonum("'$n2'") {printf("%d\t%s\n", NR, $0)}' $f
awk 'NR>=strtonum("'$n1'") && NR<=strtonum("'$n2'") { if (NR=='$n') printf(">%d<", NR); else printf(" %d ", NR); printf("\t%s\n", $0)}' $f
done
DONE=1
@ -185,6 +195,10 @@ __faddr2line() {
[[ $# -lt 2 ]] && usage
objfile=$1
LIST=0
[[ "$objfile" == "--list" ]] && LIST=1 && shift && objfile=$1
[[ ! -f $objfile ]] && die "can't find objfile $objfile"
shift