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* configure.ac (AC_SEARCH_LIBS): Add check for zlib.

Browse source 
* config.in, configure: Regenerate.
	* dwarf2read.c: Include zlib.h if present.
	Modified *_SECTION macros.
	(section_is_p): New.
	(dwarf2_locate_sections): Use section_is_p instead of strcmp
	(dwarf2_resize_section): New.
	to determine whether a given section has a given name.
	(zlib_decompress_section): New.
	(dwarf2_read_section): Read the compressed section if present
	in the binary.
	* testsuite/gdb.dwarf2/dw2-compressed.S: New file.
	* testsuite/gdb.dwarf2/dw2-compressed.exp: New file.
	* MAINTAINERS: Added myself to section Write After Approval.
This commit is contained in:
Craig Silverstein 2008-04-19 05:06:54 +00:00
parent a03b3a9785
commit 233a11ab1c
9 changed files with 1025 additions and 23 deletions
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15
gdb/ChangeLog
View file

@ -1,3 +1,18 @@
2008-04-18 Craig Silverstein <csilvers@google.com>
* configure.ac (AC_SEARCH_LIBS): Add check for zlib.
* config.in, configure: Regenerate.
* dwarf2read.c: Include zlib.h if present.
Modified *_SECTION macros.
(section_is_p): New.
(dwarf2_locate_sections): Use section_is_p instead of strcmp
(dwarf2_resize_section): New.
to determine whether a given section has a given name.
(zlib_decompress_section): New.
(dwarf2_read_section): Read the compressed section if present
in the binary.
* MAINTAINERS: Added myself to section Write After Approval.
2008-04-18 Thiago Jung Bauermann <bauerman@br.ibm.com>
* defs.h (exec_set_section_offsets): Remove prototype.

1
gdb/MAINTAINERS
View file

@ -564,6 +564,7 @@ Keith Seitz keiths@redhat.com
Carlos Eduardo Seo cseo@linux.vnet.ibm.com
Stan Shebs shebs@mozilla.com
Mark Shinwell shinwell@codesourcery.com
Craig Silverstein csilvers@google.com
Aidan Skinner aidan@velvet.net
Jiri Smid smid@suse.cz
David Smith dsmith@redhat.com

3
gdb/config.in
View file

@ -527,6 +527,9 @@
/* Define to 1 if you have the `XML_StopParser' function. */
#undef HAVE_XML_STOPPARSER
/* Define to 1 if you have the <zlib.h> header file. */
#undef HAVE_ZLIB_H
/* Define to 1 if your system has the _etext variable. */
#undef HAVE__ETEXT

554
gdb/configure vendored
View file

@ -9595,6 +9595,560 @@ if test "$ac_cv_search_socketpair" != no; then
fi
# Link in zlib if we can. This allows us to read compressed debug sections.
echo "$as_me:$LINENO: checking for library containing zlibVersion" >&5
echo $ECHO_N "checking for library containing zlibVersion... $ECHO_C" >&6
if test "${ac_cv_search_zlibVersion+set}" = set; then
echo $ECHO_N "(cached) $ECHO_C" >&6
else
ac_func_search_save_LIBS=$LIBS
ac_cv_search_zlibVersion=no
cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
/* Override any gcc2 internal prototype to avoid an error. */
#ifdef __cplusplus
extern "C"
#endif
/* We use char because int might match the return type of a gcc2
builtin and then its argument prototype would still apply. */
char zlibVersion ();
int
main ()
{
zlibVersion ();
;
return 0;
}
_ACEOF
rm -f conftest.$ac_objext conftest$ac_exeext
if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
(eval $ac_link) 2>conftest.er1
ac_status=$?
grep -v '^ *+' conftest.er1 >conftest.err
rm -f conftest.er1
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; } &&
{ ac_try='test -s conftest$ac_exeext'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
ac_cv_search_zlibVersion="none required"
else
echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
fi
rm -f conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
if test "$ac_cv_search_zlibVersion" = no; then
for ac_lib in z; do
LIBS="-l$ac_lib $ac_func_search_save_LIBS"
cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
/* Override any gcc2 internal prototype to avoid an error. */
#ifdef __cplusplus
extern "C"
#endif
/* We use char because int might match the return type of a gcc2
builtin and then its argument prototype would still apply. */
char zlibVersion ();
int
main ()
{
zlibVersion ();
;
return 0;
}
_ACEOF
rm -f conftest.$ac_objext conftest$ac_exeext
if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
(eval $ac_link) 2>conftest.er1
ac_status=$?
grep -v '^ *+' conftest.er1 >conftest.err
rm -f conftest.er1
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; } &&
{ ac_try='test -s conftest$ac_exeext'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
ac_cv_search_zlibVersion="-l$ac_lib"
break
else
echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
fi
rm -f conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
done
fi
LIBS=$ac_func_search_save_LIBS
fi
echo "$as_me:$LINENO: result: $ac_cv_search_zlibVersion" >&5
echo "${ECHO_T}$ac_cv_search_zlibVersion" >&6
if test "$ac_cv_search_zlibVersion" != no; then
test "$ac_cv_search_zlibVersion" = "none required" || LIBS="$ac_cv_search_zlibVersion $LIBS"
for ac_header in zlib.h
do
as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
if eval "test \"\${$as_ac_Header+set}\" = set"; then
echo "$as_me:$LINENO: checking for $ac_header" >&5
echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
if eval "test \"\${$as_ac_Header+set}\" = set"; then
echo $ECHO_N "(cached) $ECHO_C" >&6
fi
echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
else
# Is the header compilable?
echo "$as_me:$LINENO: checking $ac_header usability" >&5
echo $ECHO_N "checking $ac_header usability... $ECHO_C" >&6
cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
$ac_includes_default
#include <$ac_header>
_ACEOF
rm -f conftest.$ac_objext
if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
(eval $ac_compile) 2>conftest.er1
ac_status=$?
grep -v '^ *+' conftest.er1 >conftest.err
rm -f conftest.er1
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; } &&
{ ac_try='test -s conftest.$ac_objext'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
ac_header_compiler=yes
else
echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
ac_header_compiler=no
fi
rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
echo "${ECHO_T}$ac_header_compiler" >&6
# Is the header present?
echo "$as_me:$LINENO: checking $ac_header presence" >&5
echo $ECHO_N "checking $ac_header presence... $ECHO_C" >&6
cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
#include <$ac_header>
_ACEOF
if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
(eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
ac_status=$?
grep -v '^ *+' conftest.er1 >conftest.err
rm -f conftest.er1
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } >/dev/null; then
if test -s conftest.err; then
ac_cpp_err=$ac_c_preproc_warn_flag
ac_cpp_err=$ac_cpp_err$ac_c_werror_flag
else
ac_cpp_err=
fi
else
ac_cpp_err=yes
fi
if test -z "$ac_cpp_err"; then
ac_header_preproc=yes
else
echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
ac_header_preproc=no
fi
rm -f conftest.err conftest.$ac_ext
echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
echo "${ECHO_T}$ac_header_preproc" >&6
# So? What about this header?
case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in
yes:no: )
{ echo "$as_me:$LINENO: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&5
echo "$as_me: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&2;}
{ echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the compiler's result" >&5
echo "$as_me: WARNING: $ac_header: proceeding with the compiler's result" >&2;}
ac_header_preproc=yes
;;
no:yes:* )
{ echo "$as_me:$LINENO: WARNING: $ac_header: present but cannot be compiled" >&5
echo "$as_me: WARNING: $ac_header: present but cannot be compiled" >&2;}
{ echo "$as_me:$LINENO: WARNING: $ac_header: check for missing prerequisite headers?" >&5
echo "$as_me: WARNING: $ac_header: check for missing prerequisite headers?" >&2;}
{ echo "$as_me:$LINENO: WARNING: $ac_header: see the Autoconf documentation" >&5
echo "$as_me: WARNING: $ac_header: see the Autoconf documentation" >&2;}
{ echo "$as_me:$LINENO: WARNING: $ac_header: section \"Present But Cannot Be Compiled\"" >&5
echo "$as_me: WARNING: $ac_header: section \"Present But Cannot Be Compiled\"" >&2;}
{ echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the preprocessor's result" >&5
echo "$as_me: WARNING: $ac_header: proceeding with the preprocessor's result" >&2;}
{ echo "$as_me:$LINENO: WARNING: $ac_header: in the future, the compiler will take precedence" >&5
echo "$as_me: WARNING: $ac_header: in the future, the compiler will take precedence" >&2;}
(
cat <<\_ASBOX
## ------------------------------------------ ##
## Report this to the AC_PACKAGE_NAME lists. ##
## ------------------------------------------ ##
_ASBOX
) |
sed "s/^/$as_me: WARNING: /" >&2
;;
esac
echo "$as_me:$LINENO: checking for $ac_header" >&5
echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
if eval "test \"\${$as_ac_Header+set}\" = set"; then
echo $ECHO_N "(cached) $ECHO_C" >&6
else
eval "$as_ac_Header=\$ac_header_preproc"
fi
echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
fi
if test `eval echo '${'$as_ac_Header'}'` = yes; then
cat >>confdefs.h <<_ACEOF
#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1
_ACEOF
fi
done
fi
# Link in zlib if we can. This allows us to read compressed debug sections.
echo "$as_me:$LINENO: checking for library containing zlibVersion" >&5
echo $ECHO_N "checking for library containing zlibVersion... $ECHO_C" >&6
if test "${ac_cv_search_zlibVersion+set}" = set; then
echo $ECHO_N "(cached) $ECHO_C" >&6
else
ac_func_search_save_LIBS=$LIBS
ac_cv_search_zlibVersion=no
cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
/* Override any gcc2 internal prototype to avoid an error. */
#ifdef __cplusplus
extern "C"
#endif
/* We use char because int might match the return type of a gcc2
builtin and then its argument prototype would still apply. */
char zlibVersion ();
int
main ()
{
zlibVersion ();
;
return 0;
}
_ACEOF
rm -f conftest.$ac_objext conftest$ac_exeext
if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
(eval $ac_link) 2>conftest.er1
ac_status=$?
grep -v '^ *+' conftest.er1 >conftest.err
rm -f conftest.er1
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; } &&
{ ac_try='test -s conftest$ac_exeext'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
ac_cv_search_zlibVersion="none required"
else
echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
fi
rm -f conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
if test "$ac_cv_search_zlibVersion" = no; then
for ac_lib in z; do
LIBS="-l$ac_lib $ac_func_search_save_LIBS"
cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
/* Override any gcc2 internal prototype to avoid an error. */
#ifdef __cplusplus
extern "C"
#endif
/* We use char because int might match the return type of a gcc2
builtin and then its argument prototype would still apply. */
char zlibVersion ();
int
main ()
{
zlibVersion ();
;
return 0;
}
_ACEOF
rm -f conftest.$ac_objext conftest$ac_exeext
if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
(eval $ac_link) 2>conftest.er1
ac_status=$?
grep -v '^ *+' conftest.er1 >conftest.err
rm -f conftest.er1
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; } &&
{ ac_try='test -s conftest$ac_exeext'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
ac_cv_search_zlibVersion="-l$ac_lib"
break
else
echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
fi
rm -f conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
done
fi
LIBS=$ac_func_search_save_LIBS
fi
echo "$as_me:$LINENO: result: $ac_cv_search_zlibVersion" >&5
echo "${ECHO_T}$ac_cv_search_zlibVersion" >&6
if test "$ac_cv_search_zlibVersion" != no; then
test "$ac_cv_search_zlibVersion" = "none required" || LIBS="$ac_cv_search_zlibVersion $LIBS"
for ac_header in zlib.h
do
as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
if eval "test \"\${$as_ac_Header+set}\" = set"; then
echo "$as_me:$LINENO: checking for $ac_header" >&5
echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
if eval "test \"\${$as_ac_Header+set}\" = set"; then
echo $ECHO_N "(cached) $ECHO_C" >&6
fi
echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
else
# Is the header compilable?
echo "$as_me:$LINENO: checking $ac_header usability" >&5
echo $ECHO_N "checking $ac_header usability... $ECHO_C" >&6
cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
$ac_includes_default
#include <$ac_header>
_ACEOF
rm -f conftest.$ac_objext
if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
(eval $ac_compile) 2>conftest.er1
ac_status=$?
grep -v '^ *+' conftest.er1 >conftest.err
rm -f conftest.er1
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; } &&
{ ac_try='test -s conftest.$ac_objext'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
ac_header_compiler=yes
else
echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
ac_header_compiler=no
fi
rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
echo "${ECHO_T}$ac_header_compiler" >&6
# Is the header present?
echo "$as_me:$LINENO: checking $ac_header presence" >&5
echo $ECHO_N "checking $ac_header presence... $ECHO_C" >&6
cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
#include <$ac_header>
_ACEOF
if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
(eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
ac_status=$?
grep -v '^ *+' conftest.er1 >conftest.err
rm -f conftest.er1
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } >/dev/null; then
if test -s conftest.err; then
ac_cpp_err=$ac_c_preproc_warn_flag
ac_cpp_err=$ac_cpp_err$ac_c_werror_flag
else
ac_cpp_err=
fi
else
ac_cpp_err=yes
fi
if test -z "$ac_cpp_err"; then
ac_header_preproc=yes
else
echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
ac_header_preproc=no
fi
rm -f conftest.err conftest.$ac_ext
echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
echo "${ECHO_T}$ac_header_preproc" >&6
# So? What about this header?
case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in
yes:no: )
{ echo "$as_me:$LINENO: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&5
echo "$as_me: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&2;}
{ echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the compiler's result" >&5
echo "$as_me: WARNING: $ac_header: proceeding with the compiler's result" >&2;}
ac_header_preproc=yes
;;
no:yes:* )
{ echo "$as_me:$LINENO: WARNING: $ac_header: present but cannot be compiled" >&5
echo "$as_me: WARNING: $ac_header: present but cannot be compiled" >&2;}
{ echo "$as_me:$LINENO: WARNING: $ac_header: check for missing prerequisite headers?" >&5
echo "$as_me: WARNING: $ac_header: check for missing prerequisite headers?" >&2;}
{ echo "$as_me:$LINENO: WARNING: $ac_header: see the Autoconf documentation" >&5
echo "$as_me: WARNING: $ac_header: see the Autoconf documentation" >&2;}
{ echo "$as_me:$LINENO: WARNING: $ac_header: section \"Present But Cannot Be Compiled\"" >&5
echo "$as_me: WARNING: $ac_header: section \"Present But Cannot Be Compiled\"" >&2;}
{ echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the preprocessor's result" >&5
echo "$as_me: WARNING: $ac_header: proceeding with the preprocessor's result" >&2;}
{ echo "$as_me:$LINENO: WARNING: $ac_header: in the future, the compiler will take precedence" >&5
echo "$as_me: WARNING: $ac_header: in the future, the compiler will take precedence" >&2;}
(
cat <<\_ASBOX
## ------------------------------------------ ##
## Report this to the AC_PACKAGE_NAME lists. ##
## ------------------------------------------ ##
_ASBOX
) |
sed "s/^/$as_me: WARNING: /" >&2
;;
esac
echo "$as_me:$LINENO: checking for $ac_header" >&5
echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
if eval "test \"\${$as_ac_Header+set}\" = set"; then
echo $ECHO_N "(cached) $ECHO_C" >&6
else
eval "$as_ac_Header=\$ac_header_preproc"
fi
echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
fi
if test `eval echo '${'$as_ac_Header'}'` = yes; then
cat >>confdefs.h <<_ACEOF
#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1
_ACEOF
fi
done
fi
# For the TUI, we need enhanced curses functionality.
#
# FIXME: kettenis/20040905: We prefer ncurses over the vendor-supplied

3
gdb/configure.ac
View file

@ -399,6 +399,9 @@ AC_SEARCH_LIBS(gethostbyname, nsl)
# Some systems (e.g. Solaris) have `socketpair' in libsocket.
AC_SEARCH_LIBS(socketpair, socket)
# Link in zlib if we can. This allows us to read compressed debug sections.
AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])
# For the TUI, we need enhanced curses functionality.
#
# FIXME: kettenis/20040905: We prefer ncurses over the vendor-supplied

197
gdb/dwarf2read.c
View file

@ -50,6 +50,9 @@
#include "gdb_string.h"
#include "gdb_assert.h"
#include <sys/types.h>
#ifdef HAVE_ZLIB_H
#include <zlib.h>
#endif
/* A note on memory usage for this file.
@ -195,17 +198,20 @@ asection *dwarf_eh_frame_section;
/* names of the debugging sections */
#define INFO_SECTION ".debug_info"
#define ABBREV_SECTION ".debug_abbrev"
#define LINE_SECTION ".debug_line"
#define PUBNAMES_SECTION ".debug_pubnames"
#define ARANGES_SECTION ".debug_aranges"
#define LOC_SECTION ".debug_loc"
#define MACINFO_SECTION ".debug_macinfo"
#define STR_SECTION ".debug_str"
#define RANGES_SECTION ".debug_ranges"
#define FRAME_SECTION ".debug_frame"
#define EH_FRAME_SECTION ".eh_frame"
/* Note that if the debugging section has been compressed, it might
have a name like .zdebug_info. */
#define INFO_SECTION "debug_info"
#define ABBREV_SECTION "debug_abbrev"
#define LINE_SECTION "debug_line"
#define PUBNAMES_SECTION "debug_pubnames"
#define ARANGES_SECTION "debug_aranges"
#define LOC_SECTION "debug_loc"
#define MACINFO_SECTION "debug_macinfo"
#define STR_SECTION "debug_str"
#define RANGES_SECTION "debug_ranges"
#define FRAME_SECTION "debug_frame"
#define EH_FRAME_SECTION "eh_frame"
/* local data types */
@ -1109,6 +1115,18 @@ dwarf2_has_info (struct objfile *objfile)
return (dwarf_info_section != NULL && dwarf_abbrev_section != NULL);
}
/* When loading sections, we can either look for ".<name>", or for
* ".z<name>", which indicates a compressed section. */
static int
section_is_p (asection *sectp, const char *name)
{
return ((sectp->name[0] == '.'
&& strcmp (sectp->name + 1, name) == 0)
|| (sectp->name[0] == '.' && sectp->name[1] == 'z'
&& strcmp (sectp->name + 2, name) == 0));
}
/* This function is mapped across the sections and remembers the
offset and size of each of the debugging sections we are interested
in. */
@ -1116,52 +1134,52 @@ dwarf2_has_info (struct objfile *objfile)
static void
dwarf2_locate_sections (bfd *abfd, asection *sectp, void *ignore_ptr)
{
if (strcmp (sectp->name, INFO_SECTION) == 0)
if (section_is_p (sectp, INFO_SECTION))
{
dwarf2_per_objfile->info_size = bfd_get_section_size (sectp);
dwarf_info_section = sectp;
}
else if (strcmp (sectp->name, ABBREV_SECTION) == 0)
else if (section_is_p (sectp, ABBREV_SECTION))
{
dwarf2_per_objfile->abbrev_size = bfd_get_section_size (sectp);
dwarf_abbrev_section = sectp;
}
else if (strcmp (sectp->name, LINE_SECTION) == 0)
else if (section_is_p (sectp, LINE_SECTION))
{
dwarf2_per_objfile->line_size = bfd_get_section_size (sectp);
dwarf_line_section = sectp;
}
else if (strcmp (sectp->name, PUBNAMES_SECTION) == 0)
else if (section_is_p (sectp, PUBNAMES_SECTION))
{
dwarf2_per_objfile->pubnames_size = bfd_get_section_size (sectp);
dwarf_pubnames_section = sectp;
}
else if (strcmp (sectp->name, ARANGES_SECTION) == 0)
else if (section_is_p (sectp, ARANGES_SECTION))
{
dwarf2_per_objfile->aranges_size = bfd_get_section_size (sectp);
dwarf_aranges_section = sectp;
}
else if (strcmp (sectp->name, LOC_SECTION) == 0)
else if (section_is_p (sectp, LOC_SECTION))
{
dwarf2_per_objfile->loc_size = bfd_get_section_size (sectp);
dwarf_loc_section = sectp;
}
else if (strcmp (sectp->name, MACINFO_SECTION) == 0)
else if (section_is_p (sectp, MACINFO_SECTION))
{
dwarf2_per_objfile->macinfo_size = bfd_get_section_size (sectp);
dwarf_macinfo_section = sectp;
}
else if (strcmp (sectp->name, STR_SECTION) == 0)
else if (section_is_p (sectp, STR_SECTION))
{
dwarf2_per_objfile->str_size = bfd_get_section_size (sectp);
dwarf_str_section = sectp;
}
else if (strcmp (sectp->name, FRAME_SECTION) == 0)
else if (section_is_p (sectp, FRAME_SECTION))
{
dwarf2_per_objfile->frame_size = bfd_get_section_size (sectp);
dwarf_frame_section = sectp;
}
else if (strcmp (sectp->name, EH_FRAME_SECTION) == 0)
else if (section_is_p (sectp, EH_FRAME_SECTION))
{
flagword aflag = bfd_get_section_flags (ignore_abfd, sectp);
if (aflag & SEC_HAS_CONTENTS)
@ -1170,7 +1188,7 @@ dwarf2_locate_sections (bfd *abfd, asection *sectp, void *ignore_ptr)
dwarf_eh_frame_section = sectp;
}
}
else if (strcmp (sectp->name, RANGES_SECTION) == 0)
else if (section_is_p (sectp, RANGES_SECTION))
{
dwarf2_per_objfile->ranges_size = bfd_get_section_size (sectp);
dwarf_ranges_section = sectp;
@ -1181,6 +1199,40 @@ dwarf2_locate_sections (bfd *abfd, asection *sectp, void *ignore_ptr)
dwarf2_per_objfile->has_section_at_zero = 1;
}
/* This function is called after decompressing a section, so
dwarf2_per_objfile can record its new, uncompressed size. */
static void
dwarf2_resize_section (asection *sectp, bfd_size_type new_size)
{
if (section_is_p (sectp, INFO_SECTION))
dwarf2_per_objfile->info_size = new_size;
else if (section_is_p (sectp, ABBREV_SECTION))
dwarf2_per_objfile->abbrev_size = new_size;
else if (section_is_p (sectp, LINE_SECTION))
dwarf2_per_objfile->line_size = new_size;
else if (section_is_p (sectp, PUBNAMES_SECTION))
dwarf2_per_objfile->pubnames_size = new_size;
else if (section_is_p (sectp, ARANGES_SECTION))
dwarf2_per_objfile->aranges_size = new_size;
else if (section_is_p (sectp, LOC_SECTION))
dwarf2_per_objfile->loc_size = new_size;
else if (section_is_p (sectp, MACINFO_SECTION))
dwarf2_per_objfile->macinfo_size = new_size;
else if (section_is_p (sectp, STR_SECTION))
dwarf2_per_objfile->str_size = new_size;
else if (section_is_p (sectp, FRAME_SECTION))
dwarf2_per_objfile->frame_size = new_size;
else if (section_is_p (sectp, EH_FRAME_SECTION))
dwarf2_per_objfile->eh_frame_size = new_size;
else if (section_is_p (sectp, RANGES_SECTION))
dwarf2_per_objfile->ranges_size = new_size;
else
internal_error (__FILE__, __LINE__,
_("dwarf2_resize_section: missing section_is_p check: %s"),
sectp->name);
}
/* Build a partial symbol table. */
void
@ -5236,8 +5288,87 @@ free_die_list (struct die_info *dies)
}
}
/* Decompress a section that was compressed using zlib. Store the
decompressed buffer, and its size, in OUTBUF and OUTSIZE. */
static void
zlib_decompress_section (struct objfile *objfile, asection *sectp,
gdb_byte **outbuf, bfd_size_type *outsize)
{
#ifndef HAVE_ZLIB_H
error (_("Support for zlib-compressed DWARF data (from '%s') "
"is disabled in this copy of GDB"),
bfd_get_filename (abfd));
#else
bfd *abfd = objfile->obfd;
bfd_size_type compressed_size = bfd_get_section_size (sectp);
gdb_byte *compressed_buffer = xmalloc (compressed_size);
bfd_size_type uncompressed_size;
gdb_byte *uncompressed_buffer;
z_stream strm;
int rc;
int header_size = 12;
if (bfd_seek (abfd, sectp->filepos, SEEK_SET) != 0
|| bfd_bread (compressed_buffer, compressed_size, abfd) != compressed_size)
error (_("Dwarf Error: Can't read DWARF data from '%s'"),
bfd_get_filename (abfd));
/* Read the zlib header. In this case, it should be "ZLIB" followed
by the uncompressed section size, 8 bytes in big-endian order. */
if (compressed_size < header_size
|| strncmp (compressed_buffer, "ZLIB", 4) != 0)
error (_("Dwarf Error: Corrupt DWARF ZLIB header from '%s'"),
bfd_get_filename (abfd));
uncompressed_size = compressed_buffer[4]; uncompressed_size <<= 8;
uncompressed_size += compressed_buffer[5]; uncompressed_size <<= 8;
uncompressed_size += compressed_buffer[6]; uncompressed_size <<= 8;
uncompressed_size += compressed_buffer[7]; uncompressed_size <<= 8;
uncompressed_size += compressed_buffer[8]; uncompressed_size <<= 8;
uncompressed_size += compressed_buffer[9]; uncompressed_size <<= 8;
uncompressed_size += compressed_buffer[10]; uncompressed_size <<= 8;
uncompressed_size += compressed_buffer[11];
/* It is possible the section consists of several compressed
buffers concatenated together, so we uncompress in a loop. */
strm.zalloc = NULL;
strm.zfree = NULL;
strm.opaque = NULL;
strm.avail_in = compressed_size - header_size;
strm.next_in = (Bytef*) compressed_buffer + header_size;
strm.avail_out = uncompressed_size;
uncompressed_buffer = obstack_alloc (&objfile->objfile_obstack,
uncompressed_size);
rc = inflateInit (&strm);
while (strm.avail_in > 0)
{
if (rc != Z_OK)
error (_("Dwarf Error: setting up DWARF uncompression in '%s': %d"),
bfd_get_filename (abfd), rc);
strm.next_out = ((Bytef*) uncompressed_buffer
+ (uncompressed_size - strm.avail_out));
rc = inflate (&strm, Z_FINISH);
if (rc != Z_STREAM_END)
error (_("Dwarf Error: zlib error uncompressing from '%s': %d"),
bfd_get_filename (abfd), rc);
rc = inflateReset (&strm);
}
rc = inflateEnd (&strm);
if (rc != Z_OK
|| strm.avail_out != 0)
error (_("Dwarf Error: concluding DWARF uncompression in '%s': %d"),
bfd_get_filename (abfd), rc);
xfree (compressed_buffer);
*outbuf = uncompressed_buffer;
*outsize = uncompressed_size;
#endif
}
/* Read the contents of the section at OFFSET and of size SIZE from the
object file specified by OBJFILE into the objfile_obstack and return it. */
object file specified by OBJFILE into the objfile_obstack and return it.
If the section is compressed, uncompress it before returning. */
gdb_byte *
dwarf2_read_section (struct objfile *objfile, asection *sectp)
@ -5245,11 +5376,31 @@ dwarf2_read_section (struct objfile *objfile, asection *sectp)
bfd *abfd = objfile->obfd;
gdb_byte *buf, *retbuf;
bfd_size_type size = bfd_get_section_size (sectp);
unsigned char header[4];
if (size == 0)
return NULL;
/* Check if the file has a 4-byte header indicating compression. */
if (size > sizeof (header)
&& bfd_seek (abfd, sectp->filepos, SEEK_SET) == 0
&& bfd_bread (header, sizeof (header), abfd) == sizeof (header))
{
/* Upon decompression, update the buffer and its size. */
if (strncmp (header, "ZLIB", sizeof (header)) == 0)
{
zlib_decompress_section (objfile, sectp, &buf, &size);
dwarf2_resize_section (sectp, size);
return buf;
}
}
/* If we get here, we are a normal, not-compressed section. */
buf = obstack_alloc (&objfile->objfile_obstack, size);
/* When debugging .o files, we may need to apply relocations; see
http://sourceware.org/ml/gdb-patches/2002-04/msg00136.html .
We never compress sections in .o files, so we only need to
try this when the section is not compressed. */
retbuf = symfile_relocate_debug_section (abfd, sectp, buf);
if (retbuf != NULL)
return retbuf;

5
gdb/testsuite/ChangeLog
View file

@ -1,3 +1,8 @@
2008-04-18 Craig Silverstein <csilvers@google.com>
* gdb.dwarf2/dw2-compressed.S, gdb.dwarf2/dw2-compressed.exp: New
files.
2008-04-18 Joel Brobecker <brobecker@adacore.com>
* gdb.ada/atomic_enum: New test program.

218
gdb/testsuite/gdb.dwarf2/dw2-compressed.S Normal file
View file

@ -0,0 +1,218 @@
/* This testcase is part of GDB, the GNU debugger.
Copyright 2008 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/>. */
/* This tests that gdb can read compressed sections. The contents
are the same as dw2-basic.S, but the .debug_abbrev section has been
comrpessed using zlib. */
/* Dummy function to provide debug information for. */
.text
.globl _start
_start:
.int 0
.Lbegin_text1:
.globl func_cu1
.type func_cu1, %function
func_cu1:
.Lbegin_func_cu1:
.int 0
.Lend_func_cu1:
.size func_cu1, .-func_cu1
.Lend_text1:
/* Debug information */
.section .debug_info
.Lcu1_begin:
/* CU header */
.4byte .Lcu1_end - .Lcu1_start /* Length of Compilation Unit */
.Lcu1_start:
.2byte 2 /* DWARF Version */
.4byte .Labbrev1_begin /* Offset into abbrev section */
.byte 4 /* Pointer size */
/* CU die */
.uleb128 1 /* Abbrev: DW_TAG_compile_unit */
.4byte .Lline1_begin /* DW_AT_stmt_list */
.4byte .Lend_text1 /* DW_AT_high_pc */
.4byte .Lbegin_text1 /* DW_AT_low_pc */
.ascii "file1.txt\0" /* DW_AT_name */
.ascii "GNU C 3.3.3\0" /* DW_AT_producer */
.byte 1 /* DW_AT_language (C) */
/* func_cu1 */
.uleb128 2 /* Abbrev: DW_TAG_subprogram */
.byte 1 /* DW_AT_external */
.byte 1 /* DW_AT_decl_file */
.byte 2 /* DW_AT_decl_line */
.ascii "func_cu1\0" /* DW_AT_name */
.4byte .Ltype_int-.Lcu1_begin /* DW_AT_type */
.4byte .Lbegin_func_cu1 /* DW_AT_low_pc */
.4byte .Lend_func_cu1 /* DW_AT_high_pc */
.byte 1 /* DW_AT_frame_base: length */
.byte 0x55 /* DW_AT_frame_base: DW_OP_reg5 */
.Ltype_int:
.uleb128 3 /* Abbrev: DW_TAG_base_type */
.ascii "int\0" /* DW_AT_name */
.byte 4 /* DW_AT_byte_size */
.byte 5 /* DW_AT_encoding */
.byte 0 /* End of children of CU */
.Lcu1_end:
/* Line table */
.section .debug_line
.Lline1_begin:
.4byte .Lline1_end - .Lline1_start /* Initial length */
.Lline1_start:
.2byte 2 /* Version */
.4byte .Lline1_lines - .Lline1_hdr /* header_length */
.Lline1_hdr:
.byte 1 /* Minimum insn length */
.byte 1 /* default_is_stmt */
.byte 1 /* line_base */
.byte 1 /* line_range */
.byte 0x10 /* opcode_base */
/* Standard lengths */
.byte 0
.byte 1
.byte 1
.byte 1
.byte 1
.byte 0
.byte 0
.byte 0
.byte 1
.byte 0
.byte 0
.byte 1
.byte 0
.byte 0
.byte 0
/* Include directories */
.byte 0
/* File names */
.ascii "file1.txt\0"
.uleb128 0
.uleb128 0
.uleb128 0
.byte 0
.Lline1_lines:
.byte 0 /* DW_LNE_set_address */
.uleb128 5
.byte 2
.4byte .Lbegin_func_cu1
.byte 3 /* DW_LNS_advance_line */
.sleb128 3 /* ... to 4 */
.byte 1 /* DW_LNS_copy */
.byte 1 /* DW_LNS_copy (second time as an end-of-prologue marker) */
.byte 0 /* DW_LNE_set_address */
.uleb128 5
.byte 2
.4byte .Lend_func_cu1
.byte 0 /* DW_LNE_end_of_sequence */
.uleb128 1
.byte 1
.Lline1_end:
/* Abbrev table -- compressed */
.section .zdebug_abbrev
.Labbrev1_begin:
.ascii "ZLIB"
.4byte 0
.2byte 0
.byte 0
.byte 51
.byte 0x78
.byte 0x5e
.byte 0x63
.byte 0x14
.byte 0x64
.byte 0x14
.byte 0x60
.byte 0x13
.byte 0x62
.byte 0x14
.byte 0x64
.byte 0x64
.byte 0xe6
.byte 0x50
.byte 0xe5
.byte 0x10
.byte 0xe6
.byte 0x66
.byte 0x60
.byte 0x60
.byte 0xd2
.byte 0x63
.byte 0xb0
.byte 0xe7
.byte 0xb1
.byte 0xe2
.byte 0xb6
.byte 0xe6
.byte 0x66
.byte 0xe6
.byte 0xf0
.byte 0x14
.byte 0x16
.byte 0x64
.byte 0x14
.byte 0x62
.byte 0x74
.byte 0xe0
.byte 0x02
.byte 0x00
.byte 0x25
.byte 0x78
.byte 0x02
.byte 0x81
.byte 0x78
.byte 0x9c
.byte 0x63
.byte 0x60
.byte 0x60
.byte 0x56
.byte 0x61
.byte 0x60
.byte 0xe6
.byte 0xe0
.byte 0xe6
.byte 0xb6
.byte 0xe3
.byte 0x66
.byte 0x00
.byte 0x02
.byte 0x00
.byte 0x04
.byte 0x9c
.byte 0x00
.byte 0x92

52
gdb/testsuite/gdb.dwarf2/dw2-compressed.exp Normal file
View file

@ -0,0 +1,52 @@
# Copyright 2008 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/>.
# Minimal DWARF-2 unit test
# This test can only be run on targets which support DWARF-2 and use gas.
# For now pick a sampling of likely targets.
if {![istarget *-*-linux*]
&& ![istarget *-*-gnu*]
&& ![istarget *-*-elf*]
&& ![istarget *-*-openbsd*]
&& ![istarget arm-*-eabi*]
&& ![istarget powerpc-*-eabi*]} {
return 0
}
set testfile "dw2-compressed"
set srcfile ${testfile}.S
set binfile ${objdir}/${subdir}/${testfile}.x
if { [gdb_compile "${srcdir}/${subdir}/main.c" "main-ndebug.o" object -g0] != "" } {
return -1
}
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${testfile}.o" object {nodebug}] != "" } {
return -1
}
if { [gdb_compile "${testfile}.o main-ndebug.o -static -nostdlib" "${binfile}" executable {debug}] != "" } {
return -1
}
gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}
gdb_test "set listsize 1" ""
gdb_test "list func_cu1" "4\[ \t\]+File 1 Line 4"
gdb_test "ptype func_cu1" "type = int \\(\\)"