Replace gdb-add-index with cleanroom rewrite from vrk@

build/gdb-add-index

-#!/bin/sh
-
+#!/bin/bash
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 #
-# Copyright (C) 2010 Free Software Foundation, Inc.
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# Saves the gdb index for a given binary and its shared library dependencies.
 
-# This is a modification of gdb-add-index that recursively adds an index
-# to the shared libraries dependencies from the same build.
+set -e
 
-target="$1"
-target_dir="${target%/*}"
+if [[ ! $# == 1 ]]; then
+  echo "Usage: $0 path-to-binary"
+  exit 1
+fi
 
-OLDIFS=$IFS
-IFS=$'\n'
+FILENAME="$1"
+if [[ ! -f "$FILENAME" ]]; then
+  echo "Path $FILENAME does not exist."
+  exit 1
+fi
 
-shared_libraries=$(
-    ldd -d "$target" | grep "$target_dir" | cut -d '>' -f2 | cut -d ' ' -f2
-    )
+# We're good to go! Create temp directory for index files.
+DIRECTORY=$(mktemp -d)
+echo "Made temp directory $DIRECTORY."
 
-# This function is basically the RedHat's gdb-add-index script and is why
-# we have the FSF copyright above.
-function index_one_file {
-  local file="$1"
-  local dir="${file%/*}"
+# Always remove directory on exit.
+trap "{ echo -n Removing temp directory $DIRECTORY...;
+  rm -rf $DIRECTORY; echo done; }" EXIT
 
-  # We don't care if gdb gives an error.
-  gdb -nx --batch-silent -ex "file $file" -ex "save gdb-index $dir"
+# Grab all the chromium shared library files.
+so_files=$(ldd "$FILENAME" 2>/dev/null \
+  | grep $(pwd) \
+  | sed "s/.*[ \t]\(.*\) (.*/\1/")
 
-  if test -f "${file}.gdb-index"; then
-    objcopy --add-section .gdb_index="${file}.gdb-index" --set-section-flags \
-        .gdb_index=readonly "$file" "$file"
-    rm -f "${file}.gdb-index"
+# Add index to binary and the shared library dependencies.
+for file in "$FILENAME" $so_files; do
+  basename=$(basename "$file")
+  echo -n "Adding index to $basename..."
+  readelf_out=$(readelf -S "$file")
+  if [[ $readelf_out =~ "gdb_index" ]]; then
+    echo "already contains index. Skipped."
+  else
+    gdb -batch "$file" -ex "save gdb-index $DIRECTORY" -ex "quit"
+    objcopy --add-section .gdb_index="$DIRECTORY"/$basename.gdb-index \
+      --set-section-flags .gdb_index=readonly "$file" "$file"
+    echo "done."
   fi
-}
-
-function maybe_index {
-  readelf -e "$1" | grep '.gdb_index' > /dev/null 2>&1
-  if [[ "$?" != 0 ]]; then
-    echo "Adding .gdb_index to $1"
-    index_one_file "$1"
-  else
-    echo "Skipping $1 (already has .gdb_index)"
-  fi
-}
-
-maybe_index "$target"
-for lib in $shared_libraries; do
-  maybe_index "$lib"
 done