Re: [0/4] RFC: add DWARF index support

Tom Tromey
2010-07-09T17:31:14Z

>>>>> "Tom" == Tom Tromey <tromey@redhat.com> writes:

Tom> This patch series adds support for a DWARF index to gdb.

Roland suggested we wrap up the index-creation code into a helper
script.

I'm not sure if this is something people would want in gdb proper, but I
figured I would send it here just in case.

Tom

2010-07-09 Tom Tromey <tromey@redhat.com>

* Makefile.in (install-only): Install gdb-add-index.
* gdb-add-index: New file.

2010-07-09 Tom Tromey <tromey@redhat.com>

* gdb.texinfo (Index Files): Mention gdb-add-index.

From 30714fe719e61baea03d0dc5793eb0d564faebb7 Mon Sep 17 00:00:00 2001
From: Tom Tromey <tromey@redhat.com>
Date: Fri, 9 Jul 2010 11:17:54 -0600
Subject: [PATCH 4/4] add gdb-add-index

---
gdb/ChangeLog | 5 +++++
gdb/Makefile.in | 11 ++++++++++-
gdb/doc/ChangeLog | 4 ++++
gdb/doc/gdb.texinfo | 8 ++++++++
gdb/gdb-add-index | 30 ++++++++++++++++++++++++++++++
5 files changed, 57 insertions(+), 1 deletions(-)
create mode 100755 gdb/gdb-add-index

diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 6dbb284..8210a2c 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -1018,7 +1018,16 @@ install-only: $(CONFIG_INSTALL) xml-syscall-install
$(SHELL) $(srcdir)/../mkinstalldirs \
$(DESTDIR)$(man1dir) ; \
$(INSTALL_DATA) $(srcdir)/gdb.1 \
- $(DESTDIR)$(man1dir)/$$transformed_name.1
+ $(DESTDIR)$(man1dir)/$$transformed_name.1; \
+ transformed_name=`t='$(program_transform_name)'; \
+ echo gdb-add-index | sed -e "$$t"` ; \
+ if test "x$$transformed_name" = x; then \
+ transformed_name=gdb-add-index ; \
+ else \
+ true ; \
+ fi ; \
+ $(INSTALL_PROGRAM) $(srcdir)/gdb-add-index \
+ $(DESTDIR)$(bindir)/$$transformed_name$(EXEEXT)
@$(MAKE) DO=install "DODIRS=$(SUBDIRS)" $(FLAGS_TO_PASS) subdir_do
.PHONY: install-tui
install-tui:
diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index 69141e3..457e6b4 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -15045,6 +15045,14 @@ There are currently some limitation on indices. They only work when
for DWARF debugging information, not stabs. And, they do not
currently work for programs using Ada.

+@value{GDBN} comes with a program, @command{gdb-add-index}, which can
+be used to add the index to a symbol file. It takes the symbol file
+as its only argument:
+
+@smallexample
+$ gdb-add-index symfile
+@end smallexample
+

@node Symbol Errors
@section Errors Reading Symbol Files
diff --git a/gdb/gdb-add-index b/gdb/gdb-add-index
new file mode 100755
index 0000000..c9a03b0
--- /dev/null
+++ b/gdb/gdb-add-index
@@ -0,0 +1,30 @@
+#! /bin/sh
+
+# Add a .gdb_index section to a 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/>.
+
+file="$1"
+dir="${file%/*}"
+
+# We don't care if gdb gives an error.
+gdb --batch-silent -ex "file $file" -ex "save gdb-index $d" > /dev/null 2>&1
+
+if test -f "${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"
+fi
+
+exit 0
--
1.6.2.5