http://sourceware.org/ml/gdb-patches/2010-07/msg00184.html Subject: Re: [0/4] RFC: add DWARF index support Jan Kratochvil: Fixed $d -> $dir. Jan Kratochvil: Remove /dev/null redirection. >>>>> "Tom" == Tom Tromey 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 * Makefile.in (install-only): Install gdb-add-index. * gdb-add-index: New file. 2010-07-09 Tom Tromey * gdb.texinfo (Index Files): Mention gdb-add-index. >From 30714fe719e61baea03d0dc5793eb0d564faebb7 Mon Sep 17 00:00:00 2001 From: Tom Tromey Date: Fri, 9 Jul 2010 11:17:54 -0600 Subject: [PATCH 4/4] add gdb-add-index 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 Index: gdb-7.6.1/gdb/Makefile.in =================================================================== --- gdb-7.6.1.orig/gdb/Makefile.in +++ gdb-7.6.1/gdb/Makefile.in @@ -1053,6 +1053,15 @@ install-only: install-gstack $(CONFIG_IN $(INSTALL_PROGRAM) gcore \ $(DESTDIR)$(bindir)/$$transformed_name; \ fi + transformed_name=`t='$(program_transform_name)'; \ + echo gdb-add-index | sed -e "$$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)" $(FLAGS_TO_PASS) subdir_do install-python: Index: gdb-7.6.1/gdb/doc/gdb.texinfo =================================================================== --- gdb-7.6.1.orig/gdb/doc/gdb.texinfo +++ gdb-7.6.1/gdb/doc/gdb.texinfo @@ -17159,6 +17159,14 @@ There are currently some limitation on i for DWARF debugging information, not stabs. And, they do not currently work for programs using Ada. +@value{GDBN} comes with a program, @command{gdb-add-index}, which can +be used to add the index to a symbol file. It takes the symbol file +as its only argument: + +@smallexample +$ gdb-add-index symfile +@end smallexample + @node Symbol Errors @section Errors Reading Symbol Files @@ -41738,6 +41746,7 @@ switch (die->tag) * gdbserver man:: Remote Server for the GNU Debugger man page * gcore man:: Generate a core file of a running program * gdbinit man:: gdbinit scripts +* gdb-add-index man:: Add index files to speed up GDB @end menu @node gdb man @@ -42390,6 +42399,54 @@ gdb(1), @code{info -f gdb -n Startup} The full documentation for @value{GDBN} is maintained as a Texinfo manual. If the @code{info} and @code{gdb} programs and @value{GDBN}'s Texinfo documentation are properly installed at your site, the command + +@smallexample +info gdb +@end smallexample + +should give you access to the complete manual. + +@cite{Using GDB: A Guide to the GNU Source-Level Debugger}, +Richard M. Stallman and Roland H. Pesch, July 1991. +@end ifset +@c man end + +@node gdb-add-index man +@heading gdb-add-index + +@c man title gdb-add-index Add index files to speed up GDB + +@c man begin SYNOPSIS gdb-add-index +gdb-add-index @var{filename} +@c man end + +@c man begin DESCRIPTION gdb-add-index +When GDB finds a symbol file, it scans the symbols in the file in order +to construct an internal symbol table. This lets most GDB operations +work quickly--at the cost of a delay early on. For large programs, +this delay can be quite lengthy, so GDB provides a way to build an +index, which speeds up startup. + +To determine whether a file contains such an index, use the command +@command{readelf -S filename}: the index is stored in a section named +@code{.gdb_index}. Note that the index is never generated for files that do +not contain DWARF debug information (sections named @code{.debug_*}). + +See more in +@ifset man +the @value{GDBN} manual in node @code{Index Files} +-- shell command @code{info -f gdb -n 'Index Files'}. +@end ifset +@ifclear man +@ref{Index Files}. +@end ifclear +@c man end + +@c man begin SEEALSO gdb-add-index +@ifset man +The full documentation for @value{GDBN} is maintained as a Texinfo manual. +If the @code{info} and @code{gdb} programs and @value{GDBN}'s Texinfo +documentation are properly installed at your site, the command @smallexample info gdb Index: gdb-7.6.1/gdb/gdb-add-index =================================================================== --- /dev/null +++ gdb-7.6.1/gdb/gdb-add-index @@ -0,0 +1,31 @@ +#! /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 . + +file="$1" +dir="${file%/*}" +test "$dir" = "$file" && dir="." + +# We don't care if gdb gives an error. +gdb -nx -iex 'set auto-load no' --batch-silent -ex "file $file" -ex "save gdb-index $dir" + +if test -f "${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 Index: gdb-7.6.1/gdb/doc/Makefile.in =================================================================== --- gdb-7.6.1.orig/gdb/doc/Makefile.in +++ gdb-7.6.1/gdb/doc/Makefile.in @@ -177,7 +177,7 @@ POD2MAN5 = pod2man --center="GNU Develop --release="gdb-`sed q $(srcdir)/../version.in`" --section=5 # List of man pages generated from gdb.texi -MAN1S = gdb.1 gdbserver.1 gcore.1 +MAN1S = gdb.1 gdbserver.1 gcore.1 gdb-add-index.1 MAN5S = gdbinit.5 MANS = $(MAN1S) $(MAN5S) @@ -626,6 +626,13 @@ gcore.1: $(GDB_DOC_FILES) mv -f $@.T$$$$ $@) || (rm -f $@.T$$$$ && exit 1) rm -f gcore.pod +gdb-add-index.1: $(GDB_DOC_FILES) + touch $@ + -$(TEXI2POD) $(MANCONF) -Dgdb-add-index < $(srcdir)/gdb.texinfo > gdb-add-index.pod + -($(POD2MAN1) gdb-add-index.pod | sed -e '/^.if n .na/d' > $@.T$$$$ && \ + mv -f $@.T$$$$ $@) || (rm -f $@.T$$$$ && exit 1) + rm -f gdb-add-index.pod + gdbinit.5: $(GDB_DOC_FILES) touch $@ -$(TEXI2POD) $(MANCONF) -Dgdbinit < $(srcdir)/gdb.texinfo > gdbinit.pod