gnu: valgrind: Allow ld.so symbols to be found.

Fixes <https://issues.guix.gnu.org/54728>.

* gnu/packages/valgrind.scm (valgrind/interactive)[native-inputs]:
Add libc:debug
[arguments]: Add patch-default-debuginfo-path phase
[source]: Add patch.
(valgrind-3.18)[source]: Inherit from (package-source valgrind/interactive)
and remove 'patches' field.

Co-authored-by: Ludovic Courtès <ludo@gnu.org>

2 files changed, 155 insertions, 4 deletions

diff --git a/gnu/packages/patches/valgrind-fix-default-debuginfo-path.patch b/gnu/packages/patches/valgrind-fix-default-debuginfo-path.patch
new file mode 100644
index 0000000000..f78dec02dc
--- /dev/null
+++ b/gnu/packages/patches/valgrind-fix-default-debuginfo-path.patch
@@ -0,0 +1,100 @@
+From a7f17b57a94e9cde6d7fa96ac86be5c4fc4f9211 Mon Sep 17 00:00:00 2001
+From: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>
+Date: Sun, 24 Apr 2022 22:20:50 +0200
+Subject: [PATCH] valgrind: fix default debuginfo path
+
+Description: Workaround for missing symbol in Guix's ld.so. The
+ correct fix (not stripping all the ld.so symbols) will be done in the
+ next Guix release as it requires to recompile a lot of packages.
+
+Forwarded: not-needed
+Bug-Guix: https://issues.guix.gnu.org/54728
+Author: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>
+---
+ coregrind/m_debuginfo/readelf.c | 11 ++++++-----
+ docs/xml/manual-core-adv.xml    |  4 ++--
+ docs/xml/manual-core.xml        |  2 +-
+ 3 files changed, 9 insertions(+), 8 deletions(-)
+
+diff --git a/coregrind/m_debuginfo/readelf.c b/coregrind/m_debuginfo/readelf.c
+index c586e3f33..947fcc500 100644
+--- a/coregrind/m_debuginfo/readelf.c
++++ b/coregrind/m_debuginfo/readelf.c
+@@ -1509,9 +1509,9 @@ DiImage* find_debug_file( struct _DebugInfo* di,
+ 
+    if (buildid != NULL) {
+       debugpath = ML_(dinfo_zalloc)("di.fdf.1",
+-                                    VG_(strlen)(buildid) + 33);
++                                    VG_(strlen)(buildid) + DEBUGPATH_EXTRA_BYTES_1);
+ 
+-      VG_(sprintf)(debugpath, "/usr/lib/debug/.build-id/%c%c/%s.debug",
++      VG_(sprintf)(debugpath, "DEFAULT_DEBUGINFO_PATH/.build-id/%c%c/%s.debug",
+                    buildid[0], buildid[1], buildid + 2);
+ 
+       dimg = open_debug_file(debugpath, buildid, 0, rel_ok, NULL);
+@@ -1536,7 +1536,8 @@ DiImage* find_debug_file( struct _DebugInfo* di,
+ 
+       debugpath = ML_(dinfo_zalloc)(
+                      "di.fdf.3",
+-                     VG_(strlen)(objdir) + VG_(strlen)(debugname) + 64
++                     VG_(strlen)(objdir) + VG_(strlen)(debugname)
++                     + VG_(strlen)("DEFAULT_DEBUGINFO_PATH/") + 1
+                      + (extrapath ? VG_(strlen)(extrapath) : 0)
+                      + (serverpath ? VG_(strlen)(serverpath) : 0));
+ 
+@@ -1561,7 +1562,7 @@ DiImage* find_debug_file( struct _DebugInfo* di,
+ 
+       TRY_OBJDIR_USRMERGE_OBJDIR("%s/%s");
+       TRY_OBJDIR_USRMERGE_OBJDIR("%s/.debug/%s");
+-      TRY_OBJDIR_USRMERGE_OBJDIR("/usr/lib/debug%s/%s");
++      TRY_OBJDIR_USRMERGE_OBJDIR("DEFAULT_DEBUGINFO_PATH%s/%s");
+ 
+       if (extrapath) {
+          TRY_OBJDIR("%s%s/%s", extrapath, objdir, debugname);
+@@ -1631,7 +1632,7 @@ DiImage* find_debug_file_ad_hoc( const DebugInfo* di,
+ 
+    debugpath = ML_(dinfo_zalloc)(
+                   "di.fdfah.3",
+-                  VG_(strlen)(objdir) + 64
++                  VG_(strlen)(objdir) + DEBUGPATH_EXTRA_BYTES_2
+                   + (extrapath ? VG_(strlen)(extrapath) : 0)
+                   + (serverpath ? VG_(strlen)(serverpath) : 0));
+ 
+diff --git a/docs/xml/manual-core-adv.xml b/docs/xml/manual-core-adv.xml
+index 1fa801edc..a7c01d5e6 100644
+--- a/docs/xml/manual-core-adv.xml
++++ b/docs/xml/manual-core-adv.xml
+@@ -447,7 +447,7 @@ Valgrind embedded gdbserver:</para>
+ Remote debugging using | vgdb
+ relaying data between gdb and process 2418
+ Reading symbols from /lib/ld-linux.so.2...done.
+-Reading symbols from /usr/lib/debug/lib/ld-2.11.2.so.debug...done.
++Reading symbols from DEFAULT_DEBUGINFO_PATH/lib/ld-2.11.2.so.debug...done.
+ Loaded symbols for /lib/ld-linux.so.2
+ [Switching to Thread 2418]
+ 0x001f2850 in _start () from /lib/ld-linux.so.2
+@@ -475,7 +475,7 @@ Remote communication error: Resource temporarily unavailable.
+ Remote debugging using | vgdb --pid=2479
+ relaying data between gdb and process 2479
+ Reading symbols from /lib/ld-linux.so.2...done.
+-Reading symbols from /usr/lib/debug/lib/ld-2.11.2.so.debug...done.
++Reading symbols from DEFAULT_DEBUGINFO_PATH/lib/ld-2.11.2.so.debug...done.
+ Loaded symbols for /lib/ld-linux.so.2
+ [Switching to Thread 2479]
+ 0x001f2850 in _start () from /lib/ld-linux.so.2
+diff --git a/docs/xml/manual-core.xml b/docs/xml/manual-core.xml
+index dc33e1269..f6eb60086 100644
+--- a/docs/xml/manual-core.xml
++++ b/docs/xml/manual-core.xml
+@@ -1409,7 +1409,7 @@ that can report errors, e.g. Memcheck, but not Cachegrind.</para>
+     <listitem>
+       <para>By default Valgrind searches in several well-known paths
+       for debug objects, such
+-      as <computeroutput>/usr/lib/debug/</computeroutput>.</para>
++      as <computeroutput>DEFAULT_DEBUGINFO_PATH/</computeroutput>.</para>
+ 
+       <para>However, there may be scenarios where you may wish to put
+       debug objects at an arbitrary location, such as external storage
+-- 
+2.35.1
+
diff --git a/gnu/packages/valgrind.scm b/gnu/packages/valgrind.scm
index 6648f17dfa..2a6e63a410 100644
--- a/gnu/packages/valgrind.scm
+++ b/gnu/packages/valgrind.scm
@@ -25,9 +25,12 @@
 (define-module (gnu packages valgrind)
   #:use-module (guix build-system gnu)
   #:use-module (guix download)
+  #:use-module (guix gexp)
   #:use-module (guix licenses)
   #:use-module (guix packages)
+  #:use-module (guix utils)
   #:use-module (gnu packages)
+  #:use-module (gnu packages base)
   #:use-module (gnu packages gdb)
   #:use-module (gnu packages perl))
 
@@ -93,9 +96,58 @@ also use Valgrind to build new tools.")
 (define-public valgrind/interactive
   (package/inherit
    valgrind
+   (version "3.17.0")
+   (source (origin
+             (method url-fetch)
+             (uri (list (string-append "https://sourceware.org/pub/valgrind"
+                                       "/valgrind-" version ".tar.bz2")
+                        (string-append "ftp://sourceware.org/pub/valgrind"
+                                       "/valgrind-" version ".tar.bz2")))
+             (sha256
+              (base32
+               "18l5jbk301j3462gipqn9bkfx44mdmwn0pwr73r40gl1irkfqfmd"))
+             (patches (search-patches
+                       "valgrind-enable-arm.patch"
+                       "valgrind-fix-default-debuginfo-path.patch"))))
    (inputs
     ;; GDB is needed to provide a sane default for `--db-command'.
-    `(("gdb" ,gdb)))
+    `(("gdb" ,gdb)
+      ("glibc:debug" ,(canonical-package glibc) "debug")))
+   (arguments
+    (substitute-keyword-arguments (package-arguments valgrind)
+      ((#:phases phases #~%standard-phases)
+       #~(modify-phases #$phases
+           (add-before 'configure 'patch-default-debuginfo-path
+             (lambda* (#:key inputs #:allow-other-keys)
+               ;; This helps Valgrind find the debug symbols of ld.so.
+               ;; Without it, Valgrind does not work in a Guix shell
+               ;; container and cannot be used as-is during packages tests
+               ;; phases.
+               ;; TODO: Remove on the next rebuild cycle, when libc is not
+               ;; longer fully stripped.
+               (define libc-debug
+                 (string-append (assoc-ref inputs "glibc:debug")
+                                "/lib/debug"))
+
+               (substitute* '("coregrind/m_debuginfo/readelf.c"
+                              "docs/xml/manual-core-adv.xml"
+                              "docs/xml/manual-core.xml")
+                 (("DEFAULT_DEBUGINFO_PATH")
+                  libc-debug))
+               ;; We also need to account for the bigger path in
+               ;; the malloc-ed variables.
+               (substitute* '("coregrind/m_debuginfo/readelf.c")
+                 (("DEBUGPATH_EXTRA_BYTES_1")
+                  (number->string
+                   (+ (string-length libc-debug)
+                      (string-length "/.build-id//.debug")
+                      1))))
+               (substitute* '("coregrind/m_debuginfo/readelf.c")
+                 (("DEBUGPATH_EXTRA_BYTES_2")
+                  (number->string
+                   (+ (string-length libc-debug)
+                      (string-length "/usr/lib/debug")
+                      1))))))))))
    (properties '())))
 
 (define-public valgrind-3.18
@@ -103,12 +155,11 @@ also use Valgrind to build new tools.")
     (inherit valgrind/interactive)
     (version "3.18.1")
     (source (origin
-              (method url-fetch)
+              (inherit (package-source valgrind/interactive))
               (uri (list (string-append "https://sourceware.org/pub/valgrind"
                                         "/valgrind-" version ".tar.bz2")
                          (string-append "ftp://sourceware.org/pub/valgrind"
                                         "/valgrind-" version ".tar.bz2")))
               (sha256
                (base32
-                "1xgph509i6adv9w2glviw3xrmlz0dssg8992hbvxsbkp7ahrm180"))
-              (patches (search-patches "valgrind-enable-arm.patch"))))))
+                "1xgph509i6adv9w2glviw3xrmlz0dssg8992hbvxsbkp7ahrm180"))))))