[Bug gdb/27570] New: gdb: missing support for debuginfod in core_target::build_file_mappings

[Bug gdb/27570] New: gdb: missing support for debuginfod in core_target::build_file_mappings

[mliska at suse dot cz]

https://sourceware.org/bugzilla/show_bug.cgi?id=27570

            Bug ID: 27570
           Summary: gdb: missing support for debuginfod in
                    core_target::build_file_mappings
           Product: gdb
           Version: HEAD
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: mliska at suse dot cz
  Target Milestone: ---

It seems that gdb can't utilize debuginfod protocol to get debuginfo of
binaries and shared libs:

$ export DEBUGINFOD_URLS="http://foo.bar:8002" && gdb -ex 'core
12sp3-sssd.core.715'
...
warning: Can't open file /usr/sbin/sssd during file-backed mapping note
processing
warning: Can't open file /var/lib/sss/mcpath/initgroups (deleted) during
file-backed mapping note processing
warning: Can't open file /lib64/libnss_sss.so.2 during file-backed mapping note
processing
warning: Can't open file /lib64/libnsl-2.22.so during file-backed mapping note
processing
warning: Can't open file /lib64/libnss_compat-2.22.so during file-backed
mapping note processing
warning: Can't open file /usr/lib64/libtdb.so.1.3.12 during file-backed mapping
note processing
...
warning: Can't open file /lib64/ld-2.22.so during file-backed mapping note
processing
[New LWP 715]
Missing separate debuginfo for the main executable file
Try: zypper install -C
"debuginfo(build-id)=41b05d41005e68f89b5422f1683b26c332f2d2e6"
Core was generated by `/usr/sbin/sssd'.
#0  0x00007f529a0b9350 in ?? ()

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[Bug gdb/27570] gdb: missing support for debuginfod in core_target::build_file_mappings

[mliska at suse dot cz]

https://sourceware.org/bugzilla/show_bug.cgi?id=27570

Martin Liska <mliska at suse dot cz> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |vries at gcc dot gnu.org

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[Bug gdb/27570] gdb: missing support for debuginfod in core_target::build_file_mappings

[mliska at suse dot cz]

https://sourceware.org/bugzilla/show_bug.cgi?id=27570

--- Comment #1 from Martin Liska <mliska at suse dot cz> ---
One would expect both binaries and debuginfo would be downloaded with
debuginfod client.

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[Bug gdb/27570] gdb: missing support for debuginfod in core_target::build_file_mappings

[mliska at suse dot cz]

https://sourceware.org/bugzilla/show_bug.cgi?id=27570

Martin Liska <mliska at suse dot cz> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://sourceware.org/bugz
                   |                            |illa/show_bug.cgi?id=27580

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[Bug gdb/27570] gdb: missing support for debuginfod in core_target::build_file_mappings

[mliska at suse dot cz]

https://sourceware.org/bugzilla/show_bug.cgi?id=27570

Martin Liska <mliska at suse dot cz> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://sourceware.org/bugz
                   |                            |illa/show_bug.cgi?id=27573

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[Bug gdb/27570] gdb: missing support for debuginfod in core_target::build_file_mappings

[fche at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27570

Frank Ch. Eigler <fche at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |fche at redhat dot com

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[Bug gdb/27570] gdb: missing support for debuginfod in core_target::build_file_mappings

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=27570

--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
Right, we could use:
...
int debuginfod_find_executable(debuginfod_client *client,
                               const unsigned char *build_id,
                               int build_id_len,
                               char ** path);
...
for that.

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[Bug gdb/27570] gdb: missing support for debuginfod in core_target::build_file_mappings

[fche at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27570

Frank Ch. Eigler <fche at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at sourceware dot org   |amerey at redhat dot com

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[Bug gdb/27570] gdb: missing support for debuginfod in core_target::build_file_mappings

[mark at klomp dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=27570

Mark Wielaard <mark at klomp dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mark at klomp dot org

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[Bug gdb/27570] gdb: missing support for debuginfod in core_target::build_file_mappings

[lennordocdoc0921 at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27570

Lennor <lennordocdoc0921 at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |lennordocdoc0921 at gmail dot com

--- Comment #3 from Lennor <lennordocdoc0921 at gmail dot com> ---
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[Bug gdb/27570] gdb: missing support for debuginfod in core_target::build_file_mappings

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=27570

--- Comment #4 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Aaron Merey <amerey@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=b91f93a02c9c32e55073c0f18b330a6a9c5cfa34

commit b91f93a02c9c32e55073c0f18b330a6a9c5cfa34
Author: Aaron Merey <amerey@redhat.com>
Date:   Wed Mar 2 20:00:59 2022 -0500

    PR gdb/27570: missing support for debuginfod in
core_target::build_file_mappings

    Add debuginfod support to core_target::build_file_mappings and
    locate_exec_from_corefile_build_id to enable the downloading of
    missing executables and shared libraries referenced in core files.

    Also add debuginfod support to solib_map_sections so that previously
    downloaded shared libraries can be retrieved from the local debuginfod
    cache.

    When core file shared libraries are found locally, verify that their
    build-ids match the corresponding build-ids found in the core file.
    If there is a mismatch, attempt to query debuginfod for the correct
    build and print a warning if unsuccessful:

      warning: Build-id of /lib64/libc.so.6 does not match core file.

    Also disable debuginfod when gcore invokes gdb.  Debuginfo is not
    needed for core file generation so debuginfod queries will slow down
    gcore unnecessarily.

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[Bug gdb/27570] gdb: missing support for debuginfod in core_target::build_file_mappings

[mliska at suse dot cz]

https://sourceware.org/bugzilla/show_bug.cgi?id=27570

--- Comment #5 from Martin Liska <mliska at suse dot cz> ---
Great, thanks for working on that!

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[Bug gdb/27570] gdb: missing support for debuginfod in core_target::build_file_mappings

[amerey at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27570

Aaron Merey <amerey at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED

--- Comment #6 from Aaron Merey <amerey at redhat dot com> ---
(In reply to Martin Liska from comment #5)
> Great, thanks for working on that!

No problem! Closing this PR now.

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