From FEDORA_PATCHES Mon Sep 17 00:00:00 2001

From: Keith Seitz <keiths@redhat.com>

Date: Tue, 9 Jun 2020 08:29:41 -0700

Subject: gdb-rhbz1838777-debuginfod.patch

;; Backport debuginofd support.

;; (Aaron Merey, RH BZ 183877)

commit 0d79cdc494d5eb9db26a602d62c92d49f83f407e

Author: Aaron Merey <amerey@redhat.com>

Date:   Wed Feb 26 17:40:49 2020 -0500

    Add debuginfod support to GDB

    debuginfod is a lightweight web service that indexes ELF/DWARF debugging

    resources by build-id and serves them over HTTP.

    This patch enables GDB to query debuginfod servers for separate debug

    files and source code when it is otherwise not able to find them.

    GDB can be built with debuginfod using the --with-debuginfod configure

    option.

    This requires that libdebuginfod be installed and found at configure time.

    debuginfod is packaged with elfutils, starting with version 0.178.

    For more information see https://sourceware.org/elfutils/.

    Tested on x86_64 Fedora 31.

    gdb/ChangeLog:

    2020-02-26  Aaron Merey  <amerey@redhat.com>

            * Makefile.in: Handle optional debuginfod support.

            * NEWS: Update.

            * README: Add --with-debuginfod summary.

            * config.in: Regenerate.

            * configure: Regenerate.

            * configure.ac: Handle optional debuginfod support.

            * debuginfod-support.c: debuginfod helper functions.

            * debuginfod-support.h: Ditto.

            * doc/gdb.texinfo: Add --with-debuginfod to configure options

            summary.

            * dwarf2/read.c (dwarf2_get_dwz_file): Query debuginfod servers

            when a dwz file cannot be found.

            * elfread.c (elf_symfile_read): Query debuginfod servers when a

            debuginfo file cannot be found.

            * source.c (open_source_file): Query debuginfod servers when a

            source file cannot be found.

            * top.c (print_gdb_configuration): Include

            --{with,without}-debuginfod in the output.

    gdb/testsuite/ChangeLog:

    2020-02-26  Aaron Merey  <amerey@redhat.com>

            * gdb.debuginfod: New directory for debuginfod tests.

            * gdb.debuginfod/main.c: New test file.

            * gdb.debuginfod/fetch_src_and_symbols.exp: New tests.

diff --git a/config/debuginfod.m4 b/config/debuginfod.m4

new file mode 100644

--- /dev/null

+++ b/config/debuginfod.m4

@@ -0,0 +1,38 @@

+dnl Copyright (C) 1997-2019 Free Software Foundation, Inc.

+dnl This file is free software, distributed under the terms of the GNU

+dnl General Public License.  As a special exception to the GNU General

+dnl Public License, this file may be distributed as part of a program

+dnl that contains a configuration script generated by Autoconf, under

+dnl the same distribution terms as the rest of that program.

+

+AC_DEFUN([AC_DEBUGINFOD],

+[

+# Enable debuginfod

+AC_ARG_WITH([debuginfod],

+        AC_HELP_STRING([--with-debuginfod],

+                       [Enable debuginfo lookups with debuginfod (auto/yes/no)]),

+        [], [with_debuginfod=auto])

+AC_MSG_CHECKING([whether to use debuginfod])

+AC_MSG_RESULT([$with_debuginfod])

+

+if test "${with_debuginfod}" = no; then

+  AC_MSG_WARN([debuginfod support disabled; some features may be unavailable.])

+else

+  AC_CHECK_LIB([debuginfod], [debuginfod_begin], [have_debuginfod_lib=yes])

+  AC_CHECK_DECL([debuginfod_begin], [have_debuginfod_h=yes], [],

+                [#include <elfutils/debuginfod.h>])

+  if test "x$have_debuginfod_lib" = "xyes" -a \

+          "x$have_debuginfod_h" = "xyes"; then

+    AC_DEFINE([HAVE_LIBDEBUGINFOD], [1],

+              [Define to 1 if debuginfod is enabled.])

+    AC_SUBST([LIBDEBUGINFOD], ["-ldebuginfod"])

+  else

+    AC_SUBST([LIBDEBUGINFOD], [])

+    if test "$with_debuginfod" = yes; then

+      AC_MSG_ERROR([debuginfod is missing or unusable])

+    else

+      AC_MSG_WARN([debuginfod is missing or unusable; some features may be unavailable.])

+    fi

+  fi

+fi

+])

diff --git a/gdb/Makefile.in b/gdb/Makefile.in

--- a/gdb/Makefile.in

+++ b/gdb/Makefile.in

@@ -612,7 +612,8 @@ CLIBS = $(SIM) $(READLINE) $(OPCODES) $(BFD) $(LIBCTF) $(ZLIB) \

 	@LIBS@ @GUILE_LIBS@ @PYTHON_LIBS@ \

 	$(LIBEXPAT) $(LIBLZMA) $(LIBBABELTRACE) $(LIBIPT) \

 	$(LIBIBERTY) $(WIN32LIBS) $(LIBGNU) $(LIBICONV) $(LIBMPFR) \

-	$(SRCHIGH_LIBS) $(LIBXXHASH) $(PTHREAD_LIBS)

+	$(SRCHIGH_LIBS) $(LIBXXHASH) $(PTHREAD_LIBS) \

+	@LIBDEBUGINFOD@

 CDEPS = $(NAT_CDEPS) $(SIM) $(BFD) $(READLINE_DEPS) $(LIBCTF) \

 	$(OPCODES) $(INTL_DEPS) $(LIBIBERTY) $(CONFIG_DEPS) $(LIBGNU)

@@ -1016,6 +1017,7 @@ COMMON_SFILES = \

 	dbxread.c \

 	dcache.c \

 	debug.c \

+	debuginfod-support.c \

 	dictionary.c \

 	disasm.c \

 	disasm-selftests.c \

diff --git a/gdb/NEWS b/gdb/NEWS

--- a/gdb/NEWS

+++ b/gdb/NEWS

@@ -932,6 +932,20 @@ SH-5/SH64 running OpenBSD 	SH-5/SH64 support in sh*-*-openbsd*

      manual for a further description of this feature.

+* GDB now supports debuginfod, an HTTP server for distributing ELF/DWARF

+  debugging information as well as source code.

+

+  When built with debuginfod, GDB can automatically query debuginfod

+  servers for the separate debug files and source code of the executable

+  being debugged.

+

+  To build GDB with debuginfod, pass --with-debuginfod to configure (this

+  requires libdebuginfod, the debuginfod client library).

+

+  debuginfod is distributed with elfutils, starting with version 0.178.

+

+  You can get the latest version from https://sourceware.org/elfutils.

+

 * New features in the GDB remote stub, GDBserver

   ** GDBserver is now able to start inferior processes with a

diff --git a/gdb/README b/gdb/README

--- a/gdb/README

+++ b/gdb/README

@@ -432,6 +432,15 @@ more obscure GDB `configure' options are not listed here.

      Use the curses library instead of the termcap library, for

      text-mode terminal operations.

+`--with-debuginfod'

+     Build GDB with libdebuginfod, the debuginfod client library.  Used

+     to automatically fetch source files and separate debug files from

+     debuginfod servers using the associated executable's build ID.

+     Enabled by default if libdebuginfod is installed and found at

+     configure time.  debuginfod is packaged with elfutils, starting

+     with version 0.178.  You can get the latest version from

+     'https://sourceware.org/elfutils/'.

+

 `--with-libunwind-ia64'

      Use the libunwind library for unwinding function call stack on ia64

      target platforms.

diff --git a/gdb/config.in b/gdb/config.in

--- a/gdb/config.in

+++ b/gdb/config.in

@@ -230,6 +230,9 @@

 /* Define if you have the babeltrace library. */

 #undef HAVE_LIBBABELTRACE

+/* Define to 1 if debuginfod is enabled. */

+#undef HAVE_LIBDEBUGINFOD

+

 /* Define if you have the expat library. */

 #undef HAVE_LIBEXPAT

diff --git a/gdb/configure b/gdb/configure

--- a/gdb/configure

+++ b/gdb/configure

@@ -758,6 +758,7 @@ REPORT_BUGS_TEXI

 REPORT_BUGS_TO

 PKGVERSION

 CODESIGN_CERT

+LIBDEBUGINFOD

 HAVE_NATIVE_GCORE_TARGET

 TARGET_OBS

 subdirs

@@ -875,6 +876,7 @@ enable_64_bit_bfd

 enable_gdbmi

 enable_tui

 enable_gdbtk

+with_debuginfod

 with_libunwind_ia64

 with_curses

 enable_profiling

@@ -1611,6 +1613,8 @@ Optional Packages:

                           do not restrict auto-loaded files locations

   --with-rpm              query rpm database for missing debuginfos (yes/no,

                           def. auto=librpm.so)

+  --with-debuginfod       Enable debuginfo lookups with debuginfod

+                          (auto/yes/no)

   --with-libunwind-ia64   use libunwind frame unwinding for ia64 targets

   --with-curses           use the curses library instead of the termcap

                           library

@@ -2271,6 +2275,52 @@ rm -f conftest.val

 } # ac_fn_c_compute_int

+# ac_fn_c_check_decl LINENO SYMBOL VAR INCLUDES

+# ---------------------------------------------

+# Tests whether SYMBOL is declared in INCLUDES, setting cache variable VAR

+# accordingly.

+ac_fn_c_check_decl ()

+{

+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack

+  as_decl_name=`echo $2|sed 's/ *(.*//'`

+  as_decl_use=`echo $2|sed -e 's/(/((/' -e 's/)/) 0&/' -e 's/,/) 0& (/g'`

+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $as_decl_name is declared" >&5

+$as_echo_n "checking whether $as_decl_name is declared... " >&6; }

+if eval \${$3+:} false; then :

+  $as_echo_n "(cached) " >&6

+else

+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext

+/* end confdefs.h.  */

+$4

+int

+main ()

+{

+#ifndef $as_decl_name

+#ifdef __cplusplus

+  (void) $as_decl_use;

+#else

+  (void) $as_decl_name;

+#endif

+#endif

+

+  ;

+  return 0;

+}

+_ACEOF

+if ac_fn_c_try_compile "$LINENO"; then :

+  eval "$3=yes"

+else

+  eval "$3=no"

+fi

+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext

+fi

+eval ac_res=\$$3

+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5

+$as_echo "$ac_res" >&6; }

+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno

+

+} # ac_fn_c_check_decl

+

 # ac_fn_c_check_func LINENO FUNC VAR

 # ----------------------------------

 # Tests whether FUNC exists, setting the cache variable VAR accordingly

@@ -2449,52 +2499,6 @@ $as_echo "$ac_res" >&6; }

 } # ac_fn_c_check_type

-# ac_fn_c_check_decl LINENO SYMBOL VAR INCLUDES

-# ---------------------------------------------

-# Tests whether SYMBOL is declared in INCLUDES, setting cache variable VAR

-# accordingly.

-ac_fn_c_check_decl ()

-{

-  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack

-  as_decl_name=`echo $2|sed 's/ *(.*//'`

-  as_decl_use=`echo $2|sed -e 's/(/((/' -e 's/)/) 0&/' -e 's/,/) 0& (/g'`

-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $as_decl_name is declared" >&5

-$as_echo_n "checking whether $as_decl_name is declared... " >&6; }

-if eval \${$3+:} false; then :

-  $as_echo_n "(cached) " >&6

-else

-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext

-/* end confdefs.h.  */

-$4

-int

-main ()

-{

-#ifndef $as_decl_name

-#ifdef __cplusplus

-  (void) $as_decl_use;

-#else

-  (void) $as_decl_name;

-#endif

-#endif

-

-  ;

-  return 0;

-}

-_ACEOF

-if ac_fn_c_try_compile "$LINENO"; then :

-  eval "$3=yes"

-else

-  eval "$3=no"

-fi

-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext

-fi

-eval ac_res=\$$3

-	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5

-$as_echo "$ac_res" >&6; }

-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno

-

-} # ac_fn_c_check_decl

-

 # ac_fn_cxx_try_link LINENO

 # -------------------------

 # Try to link conftest.$ac_ext, and return whether this succeeded.

@@ -6658,8 +6662,8 @@ $as_echo_n "checking specific librpm version... " >&6; }

   if test "$cross_compiling" = yes; then :

   { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5

 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}

-as_fn_error "cannot run test program while cross compiling

-See \`config.log' for more details." "$LINENO" 5; }

+as_fn_error $? "cannot run test program while cross compiling

+See \`config.log' for more details" "$LINENO" 5; }

 else

   cat confdefs.h - <<_ACEOF >conftest.$ac_ext

 /* end confdefs.h.  */

@@ -6830,7 +6834,7 @@ $as_echo "#define HAVE_LIBRPM 1" >>confdefs.h

 $as_echo "no" >&6; }

     LIBS="$save_LIBS"

     if $DLOPEN_REQUIRE; then

-      as_fn_error "Specific name $LIBRPM was requested but it could not be opened." "$LINENO" 5

+      as_fn_error $? "Specific name $LIBRPM was requested but it could not be opened." "$LINENO" 5

     fi

@@ -6845,7 +6849,7 @@ if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then

 set dummy ${ac_tool_prefix}pkg-config; ac_word=$2

 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5

 $as_echo_n "checking for $ac_word... " >&6; }

-if test "${ac_cv_path_PKG_CONFIG+set}" = set; then :

+if ${ac_cv_path_PKG_CONFIG+:} false; then :

   $as_echo_n "(cached) " >&6

 else

   case $PKG_CONFIG in

@@ -6859,7 +6863,7 @@ do

   IFS=$as_save_IFS

   test -z "$as_dir" && as_dir=.

     for ac_exec_ext in '' $ac_executable_extensions; do

-  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then

+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then

     ac_cv_path_PKG_CONFIG="$as_dir/$ac_word$ac_exec_ext"

     $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5

     break 2

@@ -6888,7 +6892,7 @@ if test -z "$ac_cv_path_PKG_CONFIG"; then

 set dummy pkg-config; ac_word=$2

 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5

 $as_echo_n "checking for $ac_word... " >&6; }

-if test "${ac_cv_path_ac_pt_PKG_CONFIG+set}" = set; then :

+if ${ac_cv_path_ac_pt_PKG_CONFIG+:} false; then :

   $as_echo_n "(cached) " >&6

 else

   case $ac_pt_PKG_CONFIG in

@@ -6902,7 +6906,7 @@ do

   IFS=$as_save_IFS

   test -z "$as_dir" && as_dir=.

     for ac_exec_ext in '' $ac_executable_extensions; do

-  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then

+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then

     ac_cv_path_ac_pt_PKG_CONFIG="$as_dir/$ac_word$ac_exec_ext"

     $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5

     break 2

@@ -7086,7 +7090,7 @@ $as_echo "#define HAVE_LIBRPM 1" >>confdefs.h

       LIBS="$LIBS $RPM_LIBS"

     else

       if $RPM_REQUIRE; then

-	as_fn_error "$RPM_PKG_ERRORS" "$LINENO" 5

+	as_fn_error $? "$RPM_PKG_ERRORS" "$LINENO" 5

       else

 	{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $RPM_PKG_ERRORS" >&5

 $as_echo "$as_me: WARNING: $RPM_PKG_ERRORS" >&2;}

@@ -7332,8 +7336,92 @@ $as_echo "$as_me: WARNING: gdbtk isn't supported on $host; disabling" >&2;}

     enable_gdbtk=no ;;

 esac

-# Libunwind support for ia64.

+# Handle optional debuginfod support

+

+# Enable debuginfod

+

+# Check whether --with-debuginfod was given.

+if test "${with_debuginfod+set}" = set; then :

+  withval=$with_debuginfod;

+else

+  with_debuginfod=auto

+fi

+

+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to use debuginfod" >&5

+$as_echo_n "checking whether to use debuginfod... " >&6; }

+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $with_debuginfod" >&5

+$as_echo "$with_debuginfod" >&6; }

+

+if test "${with_debuginfod}" = no; then

+  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: debuginfod support disabled; some features may be unavailable." >&5

+$as_echo "$as_me: WARNING: debuginfod support disabled; some features may be unavailable." >&2;}

+else

+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for debuginfod_begin in -ldebuginfod" >&5

+$as_echo_n "checking for debuginfod_begin in -ldebuginfod... " >&6; }

+if ${ac_cv_lib_debuginfod_debuginfod_begin+:} false; then :

+  $as_echo_n "(cached) " >&6

+else

+  ac_check_lib_save_LIBS=$LIBS

+LIBS="-ldebuginfod  $LIBS"

+cat confdefs.h - <<_ACEOF >conftest.$ac_ext

+/* end confdefs.h.  */

+

+/* Override any GCC internal prototype to avoid an error.

+   Use char because int might match the return type of a GCC

+   builtin and then its argument prototype would still apply.  */

+#ifdef __cplusplus

+extern "C"

+#endif

+char debuginfod_begin ();

+int

+main ()

+{

+return debuginfod_begin ();

+  ;

+  return 0;

+}

+_ACEOF

+if ac_fn_c_try_link "$LINENO"; then :

+  ac_cv_lib_debuginfod_debuginfod_begin=yes

+else

+  ac_cv_lib_debuginfod_debuginfod_begin=no

+fi

+rm -f core conftest.err conftest.$ac_objext \

+    conftest$ac_exeext conftest.$ac_ext

+LIBS=$ac_check_lib_save_LIBS

+fi

+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_debuginfod_debuginfod_begin" >&5

+$as_echo "$ac_cv_lib_debuginfod_debuginfod_begin" >&6; }

+if test "x$ac_cv_lib_debuginfod_debuginfod_begin" = xyes; then :

+  have_debuginfod_lib=yes

+fi

+

+  ac_fn_c_check_decl "$LINENO" "debuginfod_begin" "ac_cv_have_decl_debuginfod_begin" "#include <elfutils/debuginfod.h>

+"

+if test "x$ac_cv_have_decl_debuginfod_begin" = xyes; then :

+  have_debuginfod_h=yes

+fi

+

+  if test "x$have_debuginfod_lib" = "xyes" -a \

+          "x$have_debuginfod_h" = "xyes"; then

+

+$as_echo "#define HAVE_LIBDEBUGINFOD 1" >>confdefs.h

+

+    LIBDEBUGINFOD="-ldebuginfod"

+  else

+

+    if test "$with_debuginfod" = yes; then

+      as_fn_error $? "debuginfod is missing or unusable" "$LINENO" 5

+    else

+      { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: debuginfod is missing or unusable; some features may be unavailable." >&5

+$as_echo "$as_me: WARNING: debuginfod is missing or unusable; some features may be unavailable." >&2;}

+    fi

+  fi

+fi

+

+

+# Libunwind support for ia64.

 # Check whether --with-libunwind-ia64 was given.

 if test "${with_libunwind_ia64+set}" = set; then :

@@ -16441,7 +16529,7 @@ _ACEOF

 for ac_header in selinux/selinux.h

 do :

   ac_fn_c_check_header_mongrel "$LINENO" "selinux/selinux.h" "ac_cv_header_selinux_selinux_h" "$ac_includes_default"

-if test "x$ac_cv_header_selinux_selinux_h" = x""yes; then :

+if test "x$ac_cv_header_selinux_selinux_h" = xyes; then :

   cat >>confdefs.h <<_ACEOF

 #define HAVE_SELINUX_SELINUX_H 1

 _ACEOF

@@ -16452,7 +16540,7 @@ done

 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for security_get_boolean_active in -lselinux" >&5

 $as_echo_n "checking for security_get_boolean_active in -lselinux... " >&6; }

-if test "${ac_cv_lib_selinux_security_get_boolean_active+set}" = set; then :

+if ${ac_cv_lib_selinux_security_get_boolean_active+:} false; then :

   $as_echo_n "(cached) " >&6

 else

   ac_check_lib_save_LIBS=$LIBS

@@ -16486,7 +16574,7 @@ LIBS=$ac_check_lib_save_LIBS

 fi

 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_selinux_security_get_boolean_active" >&5

 $as_echo "$ac_cv_lib_selinux_security_get_boolean_active" >&6; }

-if test "x$ac_cv_lib_selinux_security_get_boolean_active" = x""yes; then :

+if test "x$ac_cv_lib_selinux_security_get_boolean_active" = xyes; then :

   cat >>confdefs.h <<_ACEOF

 #define HAVE_LIBSELINUX 1

 _ACEOF

diff --git a/gdb/configure.ac b/gdb/configure.ac

--- a/gdb/configure.ac

+++ b/gdb/configure.ac

@@ -18,6 +18,8 @@ dnl along with this program.  If not, see <http://www.gnu.org/licenses/>.

 dnl Process this file with autoconf to produce a configure script.

+m4_include(../config/debuginfod.m4)

+

 AC_INIT(main.c)

 AC_CONFIG_HEADERS(config.h:config.in, [echo > stamp-h])

 AM_MAINTAINER_MODE

@@ -516,8 +518,10 @@ case $host_os in

     enable_gdbtk=no ;;

 esac

-# Libunwind support for ia64.

+# Handle optional debuginfod support

+AC_DEBUGINFOD

+# Libunwind support for ia64.

 AC_ARG_WITH(libunwind-ia64,

 AS_HELP_STRING([--with-libunwind-ia64],

 	       [use libunwind frame unwinding for ia64 targets]),,

diff --git a/gdb/debuginfod-support.c b/gdb/debuginfod-support.c

new file mode 100644

--- /dev/null

+++ b/gdb/debuginfod-support.c

@@ -0,0 +1,155 @@

+/* debuginfod utilities for GDB.

+   Copyright (C) 2020 Free Software Foundation, Inc.

+

+   This file is part of GDB.

+

+   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/>.  */

+

+#include "defs.h"

+#include <errno.h>

+#include "cli/cli-style.h"

+#include "gdbsupport/scoped_fd.h"

+#include "debuginfod-support.h"

+

+#ifndef HAVE_LIBDEBUGINFOD

+scoped_fd

+debuginfod_source_query (const unsigned char *build_id,

+			 int build_id_len,

+			 const char *srcpath,

+			 gdb::unique_xmalloc_ptr<char> *destname)

+{

+  return scoped_fd (-ENOSYS);

+}

+

+scoped_fd

+debuginfod_debuginfo_query (const unsigned char *build_id,

+			    int build_id_len,

+			    const char *filename,

+			    gdb::unique_xmalloc_ptr<char> *destname)

+{

+  return scoped_fd (-ENOSYS);

+}

+#else

+#include <elfutils/debuginfod.h>

+

+/* TODO: Use debuginfod API extensions instead of these globals.  */

+static std::string desc;

+static std::string fname;

+static bool has_printed;

+

+static int

+progressfn (debuginfod_client *c, long cur, long total)

+{

+  if (check_quit_flag ())

+    {

+      printf_filtered ("Cancelling download of %s %ps...\n",

+		       desc.c_str (),

+		       styled_string (file_name_style.style (), fname.c_str ()));

+      return 1;

+    }

+

+  if (!has_printed && total != 0)

+    {

+      /* Print this message only once.  */

+      has_printed = true;

+      printf_filtered ("Downloading %s %ps...\n",

+		       desc.c_str (),

+		       styled_string (file_name_style.style (), fname.c_str ()));

+    }

+

+  return 0;

+}

+

+static debuginfod_client *

+debuginfod_init ()

+{

+  debuginfod_client *c = debuginfod_begin ();

+

+  if (c != nullptr)

+    debuginfod_set_progressfn (c, progressfn);

+

+  return c;

+}

+

+/* See debuginfod-support.h  */

+

+scoped_fd

+debuginfod_source_query (const unsigned char *build_id,

+			 int build_id_len,

+			 const char *srcpath,

+			 gdb::unique_xmalloc_ptr<char> *destname)

+{

+  if (getenv (DEBUGINFOD_URLS_ENV_VAR) == NULL)

+    return scoped_fd (-ENOSYS);

+

+  debuginfod_client *c = debuginfod_init ();

+

+  if (c == nullptr)

+    return scoped_fd (-ENOMEM);

+

+  desc = std::string ("source file");

+  fname = std::string (srcpath);

+  has_printed = false;

+

+  scoped_fd fd (debuginfod_find_source (c,

+					build_id,

+					build_id_len,

+					srcpath,

+					nullptr));

+

+  /* TODO: Add 'set debug debuginfod' command to control when error messages are shown.  */

+  if (fd.get () < 0 && fd.get () != -ENOENT)

+    printf_filtered (_("Download failed: %s.  Continuing without source file %ps.\n"),

+		     safe_strerror (-fd.get ()),

+		     styled_string (file_name_style.style (),  srcpath));

+  else

+    destname->reset (xstrdup (srcpath));

+

+  debuginfod_end (c);

+  return fd;

+}

+

+/* See debuginfod-support.h  */

+

+scoped_fd

+debuginfod_debuginfo_query (const unsigned char *build_id,

+			    int build_id_len,

+			    const char *filename,

+			    gdb::unique_xmalloc_ptr<char> *destname)

+{

+  if (getenv (DEBUGINFOD_URLS_ENV_VAR) == NULL)

+    return scoped_fd (-ENOSYS);

+

+  debuginfod_client *c = debuginfod_init ();

+

+  if (c == nullptr)

+    return scoped_fd (-ENOMEM);

+

+  desc = std::string ("separate debug info for");

+  fname = std::string (filename);

+  has_printed = false;

+  char *dname = nullptr;

+

+  scoped_fd fd (debuginfod_find_debuginfo (c, build_id, build_id_len, &dname));

+

+  if (fd.get () < 0 && fd.get () != -ENOENT)

+    printf_filtered (_("Download failed: %s.  Continuing without debug info for %ps.\n"),

+		     safe_strerror (-fd.get ()),

+		     styled_string (file_name_style.style (),  filename));

+

+  destname->reset (dname);

+  debuginfod_end (c);

+  return fd;

+}

+#endif

diff --git a/gdb/debuginfod-support.h b/gdb/debuginfod-support.h

new file mode 100644

--- /dev/null

+++ b/gdb/debuginfod-support.h

@@ -0,0 +1,62 @@

+/* debuginfod utilities for GDB.

+   Copyright (C) 2020 Free Software Foundation, Inc.

+

+   This file is part of GDB.

+

+   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/>.  */

+

+#ifndef DEBUGINFOD_SUPPORT_H

+#define DEBUGINFOD_SUPPORT_H

+

+/* Query debuginfod servers for a source file associated with an

+   executable with BUILD_ID.  BUILD_ID can be given as a binary blob or

+   a null-terminated string.  If given as a binary blob, BUILD_ID_LEN

+   should be the number of bytes.  If given as a null-terminated string,

+   BUILD_ID_LEN should be 0.

+

+   SRC_PATH should be the source file's absolute path that includes the

+   compilation directory of the CU associated with the source file.

+   For example if a CU's compilation directory is `/my/build` and the

+   source file path is `/my/source/foo.c`, then SRC_PATH should be