public inbox for gdb-patches@sourceware.org
 help / color / mirror / Atom feed
* [PATCH 1/7] gdb/debuginfod: Add debuginfod_section_query
@ 2023-02-27 19:42 Aaron Merey
  2023-02-27 19:42 ` [PATCH 2/7] gdb: add 'lazy' setting for command 'set debuginfod enabled' Aaron Merey
                   ` (7 more replies)
  0 siblings, 8 replies; 25+ messages in thread
From: Aaron Merey @ 2023-02-27 19:42 UTC (permalink / raw)
  To: gdb-patches; +Cc: Aaron Merey

Add new function debuginfod_section_query.  This function queries
debuginfod servers for an individual ELF/DWARF section associated with
a given build-id.

Also check for libdebuginfod version >= 0.188 at configure time.
debuginfod_section_query simply returns -ENOSYS if this condition
is not met.
---
 config/debuginfod.m4     |  27 +++++++++++
 gdb/config.in            |   3 ++
 gdb/configure            | 102 ++++++++++++++++++++++++++++++++++++++-
 gdb/configure.ac         |   2 +-
 gdb/debuginfod-support.c |  55 +++++++++++++++++++++
 gdb/debuginfod-support.h |  24 +++++++++
 6 files changed, 211 insertions(+), 2 deletions(-)

diff --git a/config/debuginfod.m4 b/config/debuginfod.m4
index 2c1bfbdb544..203a799719d 100644
--- a/config/debuginfod.m4
+++ b/config/debuginfod.m4
@@ -26,3 +26,30 @@ else
   AC_MSG_WARN([debuginfod support disabled; some features may be unavailable.])
 fi
 ])
+
+AC_DEFUN([AC_DEBUGINFOD_SECTION],
+[
+# Handle optional debuginfod support as well as optional section downloading support
+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([$with_debuginfod])
+
+if test "x$with_debuginfod" != xno; then
+  PKG_CHECK_MODULES([DEBUGINFOD], [libdebuginfod >= 0.188],
+    [AC_DEFINE([HAVE_DEBUGINFOD_FIND_SECTION], [1],
+	       [Define to 1 if debuginfod section downloading is supported.])],
+    [AC_MSG_WARN([libdebuginfod is missing or some features may be unavailable.])])
+
+  PKG_CHECK_MODULES([DEBUGINFOD], [libdebuginfod >= 0.179],
+    [AC_DEFINE([HAVE_LIBDEBUGINFOD], [1], [Define to 1 if debuginfod is enabled.])],
+    [if test "x$with_debuginfod" = xyes; then
+      AC_MSG_ERROR(["--with-debuginfod was given, but libdebuginfod is missing or unusable."])
+     else
+      AC_MSG_WARN([libdebuginfod is missing or unusable; some features may be unavailable.])
+     fi])
+else
+  AC_MSG_WARN([debuginfod support disabled; some features may be unavailable.])
+fi
+])
diff --git a/gdb/config.in b/gdb/config.in
index a7da88b92d7..157acd46c7c 100644
--- a/gdb/config.in
+++ b/gdb/config.in
@@ -99,6 +99,9 @@
 /* define if the compiler supports basic C++11 syntax */
 #undef HAVE_CXX11
 
+/* Define to 1 if debuginfod section downloading is supported. */
+#undef HAVE_DEBUGINFOD_FIND_SECTION
+
 /* Define to 1 if you have the declaration of `ADDR_NO_RANDOMIZE', and to 0 if
    you don't. */
 #undef HAVE_DECL_ADDR_NO_RANDOMIZE
diff --git a/gdb/configure b/gdb/configure
index 017ec05e4b7..338460c07bd 100755
--- a/gdb/configure
+++ b/gdb/configure
@@ -18349,7 +18349,7 @@ esac
 
 # Handle optional debuginfod support
 
-# Handle optional debuginfod support
+# Handle optional debuginfod support as well as optional section downloading support
 
 # Check whether --with-debuginfod was given.
 if test "${with_debuginfod+set}" = set; then :
@@ -18365,6 +18365,106 @@ $as_echo "$with_debuginfod" >&6; }
 
 if test "x$with_debuginfod" != xno; then
 
+pkg_failed=no
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for libdebuginfod >= 0.188" >&5
+$as_echo_n "checking for libdebuginfod >= 0.188... " >&6; }
+
+if test -n "$DEBUGINFOD_CFLAGS"; then
+    pkg_cv_DEBUGINFOD_CFLAGS="$DEBUGINFOD_CFLAGS"
+ elif test -n "$PKG_CONFIG"; then
+    if test -n "$PKG_CONFIG" && \
+    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libdebuginfod >= 0.188\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "libdebuginfod >= 0.188") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+  pkg_cv_DEBUGINFOD_CFLAGS=`$PKG_CONFIG --cflags "libdebuginfod >= 0.188" 2>/dev/null`
+		      test "x$?" != "x0" && pkg_failed=yes
+else
+  pkg_failed=yes
+fi
+ else
+    pkg_failed=untried
+fi
+if test -n "$DEBUGINFOD_LIBS"; then
+    pkg_cv_DEBUGINFOD_LIBS="$DEBUGINFOD_LIBS"
+ elif test -n "$PKG_CONFIG"; then
+    if test -n "$PKG_CONFIG" && \
+    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libdebuginfod >= 0.188\""; } >&5
+  ($PKG_CONFIG --exists --print-errors "libdebuginfod >= 0.188") 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; then
+  pkg_cv_DEBUGINFOD_LIBS=`$PKG_CONFIG --libs "libdebuginfod >= 0.188" 2>/dev/null`
+		      test "x$?" != "x0" && pkg_failed=yes
+else
+  pkg_failed=yes
+fi
+ else
+    pkg_failed=untried
+fi
+
+if test $pkg_failed = no; then
+  pkg_save_LDFLAGS="$LDFLAGS"
+  LDFLAGS="$LDFLAGS $pkg_cv_DEBUGINFOD_LIBS"
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+
+else
+  pkg_failed=yes
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+  LDFLAGS=$pkg_save_LDFLAGS
+fi
+
+
+
+if test $pkg_failed = yes; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+
+if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
+        _pkg_short_errors_supported=yes
+else
+        _pkg_short_errors_supported=no
+fi
+        if test $_pkg_short_errors_supported = yes; then
+	        DEBUGINFOD_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "libdebuginfod >= 0.188" 2>&1`
+        else
+	        DEBUGINFOD_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "libdebuginfod >= 0.188" 2>&1`
+        fi
+	# Put the nasty error message in config.log where it belongs
+	echo "$DEBUGINFOD_PKG_ERRORS" >&5
+
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: libdebuginfod is missing or some features may be unavailable." >&5
+$as_echo "$as_me: WARNING: libdebuginfod is missing or some features may be unavailable." >&2;}
+elif test $pkg_failed = untried; then
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: libdebuginfod is missing or some features may be unavailable." >&5
+$as_echo "$as_me: WARNING: libdebuginfod is missing or some features may be unavailable." >&2;}
+else
+	DEBUGINFOD_CFLAGS=$pkg_cv_DEBUGINFOD_CFLAGS
+	DEBUGINFOD_LIBS=$pkg_cv_DEBUGINFOD_LIBS
+        { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+
+$as_echo "#define HAVE_DEBUGINFOD_FIND_SECTION 1" >>confdefs.h
+
+fi
+
+
 pkg_failed=no
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for libdebuginfod >= 0.179" >&5
 $as_echo_n "checking for libdebuginfod >= 0.179... " >&6; }
diff --git a/gdb/configure.ac b/gdb/configure.ac
index fb43cd10d6c..499802bb4c9 100644
--- a/gdb/configure.ac
+++ b/gdb/configure.ac
@@ -342,7 +342,7 @@ case $host_os in
 esac
 
 # Handle optional debuginfod support
-AC_DEBUGINFOD
+AC_DEBUGINFOD_SECTION
 
 # Libunwind support for ia64.
 AC_ARG_WITH(libunwind-ia64,
diff --git a/gdb/debuginfod-support.c b/gdb/debuginfod-support.c
index 04d254a1601..f909742362f 100644
--- a/gdb/debuginfod-support.c
+++ b/gdb/debuginfod-support.c
@@ -80,6 +80,15 @@ debuginfod_exec_query (const unsigned char *build_id,
   return scoped_fd (-ENOSYS);
 }
 
+scoped_fd
+debuginfod_section_query (const unsigned char *build_id,
+			  int build_id_len,
+			  const char *filename,
+			  const char *section_name,
+			  gdb::unique_xmalloc_ptr<char> *destname)
+{
+  return scoped_fd (-ENOSYS);
+}
 #define NO_IMPL _("Support for debuginfod is not compiled into GDB.")
 
 #else
@@ -388,6 +397,52 @@ debuginfod_exec_query (const unsigned char *build_id,
 
   return fd;
 }
+
+/* See debuginfod-support.h  */
+
+scoped_fd
+debuginfod_section_query (const unsigned char *build_id,
+			  int build_id_len,
+			  const char *filename,
+			  const char *section_name,
+			  gdb::unique_xmalloc_ptr<char> *destname)
+{
+#if !defined (HAVE_DEBUGINFOD_FIND_SECTION)
+  return scoped_fd (-ENOSYS);
+#else
+
+ if (!debuginfod_is_enabled ())
+    return scoped_fd (-ENOSYS);
+
+  debuginfod_client *c = get_debuginfod_client ();
+
+  if (c == nullptr)
+    return scoped_fd (-ENOMEM);
+
+  char *dname = nullptr;
+  std::string desc = std::string ("section ") + section_name + " for";
+  user_data data (desc.c_str (), filename);
+
+  debuginfod_set_user_data (c, &data);
+  gdb::optional<target_terminal::scoped_restore_terminal_state> term_state;
+  if (target_supports_terminal_ours ())
+    {
+      term_state.emplace ();
+      target_terminal::ours ();
+    }
+
+  scoped_fd fd (debuginfod_find_section (c, build_id, build_id_len,
+					 section_name, &dname));
+  debuginfod_set_user_data (c, nullptr);
+  print_outcome (data, fd.get ());
+
+  if (fd.get () >= 0 && destname != nullptr)
+    destname->reset (dname);
+
+  return fd;
+#endif /* HAVE_DEBUGINFOD_FIND_SECTION */
+}
+
 #endif
 
 /* Set callback for "set debuginfod enabled".  */
diff --git a/gdb/debuginfod-support.h b/gdb/debuginfod-support.h
index 633600a79da..9701e3b4685 100644
--- a/gdb/debuginfod-support.h
+++ b/gdb/debuginfod-support.h
@@ -81,4 +81,28 @@ extern scoped_fd debuginfod_exec_query (const unsigned char *build_id,
 					const char *filename,
 					gdb::unique_xmalloc_ptr<char>
 					  *destname);
+
+/* Query debuginfod servers for the binary contents of a ELF/DWARF section
+   from a file matching 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.
+
+   FILENAME should be the name or path associated with the file matching
+   BUILD_ID.  It is used for printing messages to the user.
+
+   SECTION_NAME should be the name of an ELF/DWARF section.
+
+   If the file is successfully retrieved, return a file descriptor and store
+   the file's local path in DESTNAME.  If unsuccessful, print an error message
+   and return a negative errno.  If GDB is not built with debuginfod or
+   libdebuginfod does not support section queries, this function returns
+   -ENOSYS.  */
+
+extern scoped_fd debuginfod_section_query (const unsigned char *build_id,
+					   int build_id_len,
+					   const char *filename,
+					   const char *section_name,
+					   gdb::unique_xmalloc_ptr<char>
+					     *destname);
 #endif /* DEBUGINFOD_SUPPORT_H */
-- 
2.39.2


^ permalink raw reply	[flat|nested] 25+ messages in thread
end of thread, other threads:[~2023-05-24 18:57 UTC | newest]

Thread overview: 25+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-02-27 19:42 [PATCH 1/7] gdb/debuginfod: Add debuginfod_section_query Aaron Merey
2023-02-27 19:42 ` [PATCH 2/7] gdb: add 'lazy' setting for command 'set debuginfod enabled' Aaron Merey
2023-02-27 19:54   ` Eli Zaretskii
2023-05-24  9:31   ` Andrew Burgess
2023-02-27 19:42 ` [PATCH 3/7] gdb/debuginfod: disable pagination during downloads Aaron Merey
2023-03-03 21:33   ` Tom Tromey
2023-03-06 23:07     ` Aaron Merey
2023-05-24  9:38   ` Andrew Burgess
2023-05-24 18:57     ` Aaron Merey
2023-02-27 19:42 ` [PATCH 4/7] gdb/ui-file: Add newline tracking Aaron Merey
2023-03-07 19:33   ` Tom Tromey
2023-03-07 20:30     ` Aaron Merey
2023-03-07 20:47       ` Tom Tromey
2023-02-27 19:42 ` [PATCH 5/7] gdb/debuginfod: Support on-demand debuginfo downloading Aaron Merey
2023-03-07 20:20   ` Tom Tromey
2023-03-09  0:22     ` Aaron Merey
2023-02-27 19:42 ` [PATCH 6/7] gdb/testsuite/gdb.debuginfod: Add lazy downloading tests Aaron Merey
2023-05-02 15:48   ` Andrew Burgess
2023-05-02 16:24     ` Aaron Merey
2023-05-24 10:12   ` Andrew Burgess
2023-02-27 19:42 ` [PATCH 7/7] gdb/debuginfod: Add .debug_line downloading Aaron Merey
2023-03-07 20:36   ` Tom Tromey
2023-03-09  0:26     ` Aaron Merey
2023-02-28 11:11 ` [PATCH 1/7] gdb/debuginfod: Add debuginfod_section_query Alexandra Petlanova Hajkova
2023-05-24  9:01 ` Andrew Burgess

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).