From: Andrew Burgess <aburgess@redhat.com>
To: Aaron Merey <amerey@redhat.com>, gdb-patches@sourceware.org
Cc: Aaron Merey <amerey@redhat.com>, Eli Zaretskii <eliz@gnu.org>
Subject: Re: [PATCH 3/7 v3] gdb: Add command 'maint set/show debuginfod download-sections'
Date: Thu, 28 Sep 2023 19:32:33 +0100 [thread overview]
Message-ID: <87v8buup1a.fsf@redhat.com> (raw)
In-Reply-To: <20230816044259.2675531-4-amerey@redhat.com>
Aaron Merey <amerey@redhat.com> writes:
> v2: https://sourceware.org/pipermail/gdb-patches/2023-June/199983.html
>
> v3 updates some of the doc text.
>
> Commit message:
>
> This setting controls whether GDB may attempt to download ELF/DWARF
> sections from debuginfod servers.
>
> This setting is enabled by default if gdb is built with debuginfod
> section download support (requires libdebuginfod 0.188).
>
> Also update debuginfod command help text and gdb.texinfo with
> information on section downloading and the new command.
>
> Reviewed-By: Eli Zaretskii <eliz@gnu.org>
> Reviewed-By: Andrew Burgess <aburgess@redhat.com>
LGTM.
Approved-By: Andrew Burgess <aburgess@redhat.com>
Thanks,
Andrew
> ---
> gdb/debuginfod-support.c | 63 ++++++++++++++++++++++++++++++++++++++--
> gdb/doc/gdb.texinfo | 19 ++++++++++--
> 2 files changed, 77 insertions(+), 5 deletions(-)
>
> diff --git a/gdb/debuginfod-support.c b/gdb/debuginfod-support.c
> index 33bb9d9b7bc..c0794212a31 100644
> --- a/gdb/debuginfod-support.c
> +++ b/gdb/debuginfod-support.c
> @@ -31,6 +31,10 @@
> static cmd_list_element *set_debuginfod_prefix_list;
> static cmd_list_element *show_debuginfod_prefix_list;
>
> +/* maint set/show debuginfod commands. */
> +static cmd_list_element *maint_set_debuginfod_cmdlist;
> +static cmd_list_element *maint_show_debuginfod_cmdlist;
> +
> static const char debuginfod_on[] = "on";
> static const char debuginfod_off[] = "off";
> static const char debuginfod_ask[] = "ask";
> @@ -50,6 +54,14 @@ static const char *debuginfod_enabled =
> debuginfod_off;
> #endif
>
> +/* Controls whether ELF/DWARF section downloading is enabled. */
> +static bool debuginfod_download_sections =
> +#if defined(HAVE_LIBDEBUGINFOD_FIND_SECTION)
> + true;
> +#else
> + false;
> +#endif
> +
> static unsigned int debuginfod_verbose = 1;
>
> #ifndef HAVE_LIBDEBUGINFOD
> @@ -435,7 +447,7 @@ debuginfod_section_query (const unsigned char *build_id,
> return scoped_fd (-ENOSYS);
> #else
>
> - if (!debuginfod_is_enabled ())
> + if (!debuginfod_download_sections || !debuginfod_is_enabled ())
> return scoped_fd (-ENOSYS);
>
> debuginfod_client *c = get_debuginfod_client ();
> @@ -561,6 +573,28 @@ show_debuginfod_verbose_command (ui_file *file, int from_tty,
> value);
> }
>
> +/* Set callback for "maint set debuginfod download-sections". */
> +
> +static void
> +maint_set_debuginfod_download_sections (bool value)
> +{
> +#if !defined(HAVE_LIBDEBUGINFOD_FIND_SECTION)
> + if (value)
> + error (_("Support for section downloading is not compiled into GDB. " \
> +"Defaulting to \"off\"."));
> +#endif
> +
> + debuginfod_download_sections = value;
> +}
> +
> +/* Get callback for "maint set debuginfod download-sections". */
> +
> +static bool
> +maint_get_debuginfod_download_sections ()
> +{
> + return debuginfod_download_sections;
> +}
> +
> /* Register debuginfod commands. */
>
> void _initialize_debuginfod ();
> @@ -579,8 +613,10 @@ _initialize_debuginfod ()
> _("Set whether to use debuginfod."),
> _("Show whether to use debuginfod."),
> _("\
> -When on, enable the use of debuginfod to download missing debug info and\n\
> -source files."),
> +When set to \"on\", enable the use of debuginfod to download missing\n\
> +debug info and source files. GDB may also download components of debug\n\
> +info instead of entire files. \"off\" disables the use of debuginfod.\n\
> +When set to \"ask\", prompt whether to enable or disable debuginfod." ),
> set_debuginfod_enabled,
> get_debuginfod_enabled,
> show_debuginfod_enabled,
> @@ -611,4 +647,25 @@ query.\nTo disable, set to zero. Verbose output is displayed by default."),
> show_debuginfod_verbose_command,
> &set_debuginfod_prefix_list,
> &show_debuginfod_prefix_list);
> +
> + /* maint set/show debuginfod. */
> + add_setshow_prefix_cmd ("debuginfod", class_maintenance,
> + _("Set debuginfod specific variables."),
> + _("Show debuginfod specific variables."),
> + &maint_set_debuginfod_cmdlist,
> + &maint_show_debuginfod_cmdlist,
> + &maintenance_set_cmdlist, &maintenance_show_cmdlist);
> +
> + /* maint set/show debuginfod download-sections. */
> + add_setshow_boolean_cmd ("download-sections", class_maintenance, _("\
> +Set whether debuginfod may download individual ELF/DWARF sections."), _("\
> +Show whether debuginfod may download individual ELF/DWARF sections."), _("\
> +When enabled, debuginfod may attempt to download individual ELF/DWARF \
> +sections from debug info files.\nIf disabled, only whole debug info files \
> +may be downloaded."),
> + maint_set_debuginfod_download_sections,
> + maint_get_debuginfod_download_sections,
> + nullptr,
> + &maint_set_debuginfod_cmdlist,
> + &maint_show_debuginfod_cmdlist);
> }
> diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
> index 814cc6d714a..7ecf07e2820 100644
> --- a/gdb/doc/gdb.texinfo
> +++ b/gdb/doc/gdb.texinfo
> @@ -40920,6 +40920,17 @@ Create a core file? (y or n) @kbd{n}
> (@value{GDBP})
> @end smallexample
>
> +@kindex maint set debuginfod download-sections
> +@kindex maint show debuginfod download-sections
> +@cindex debuginfod, maintenance commands
> +@item maint set debuginfod download-sections
> +@itemx maint set debuginfod download-sections @r{[}on|off@r{]}
> +@itemx maint show debuginfod download-sections
> +Controls whether @value{GDBN} will attempt to download individual
> +ELF/DWARF sections from @code{debuginfod}. If disabled, only
> +whole debug info files will be downloaded; this could result
> +in @value{GDBN} downloading larger amounts of data.
> +
> @cindex @value{GDBN} internal error
> @cindex internal errors, control of @value{GDBN} behavior
> @cindex demangler crashes
> @@ -49430,8 +49441,12 @@ regarding @code{debuginfod}.
> @item set debuginfod enabled
> @itemx set debuginfod enabled on
> @cindex enable debuginfod
> -@value{GDBN} will attempt to query @code{debuginfod} servers when missing debug
> -info or source files.
> +@value{GDBN} may query @code{debuginfod} servers for missing debug info and
> +source files. @value{GDBN} may also download individual ELF/DWARF sections
> +such as @code{.gdb_index} to help reduce the total amount of data downloaded
> +from @code{debuginfod} servers; this can be controlled by @w{@code{maint
> +set debuginfod download-sections}} (@pxref{Maintenance Commands, maint set
> +debuginfod download-sections}).
>
> @item set debuginfod enabled off
> @value{GDBN} will not attempt to query @code{debuginfod} servers when missing
> --
> 2.41.0
next prev parent reply other threads:[~2023-09-28 18:32 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-16 4:42 [PATCH 0/7] gdb/debuginfod: Add on-demand debuginfo downloading Aaron Merey
2023-08-16 4:42 ` [PATCH 1/7] config/debuginfod.m4: Add check for libdebuginfod 0.188 Aaron Merey
2023-09-19 14:33 ` Aaron Merey
2023-09-27 10:28 ` Nick Clifton
2023-09-27 19:14 ` Aaron Merey
2023-08-16 4:42 ` [PATCH 2/7 v3] gdb/debuginfod: Add debuginfod_section_query Aaron Merey
2023-09-19 14:33 ` Aaron Merey
2023-09-28 18:28 ` Andrew Burgess
2023-10-02 18:07 ` Aaron Merey
2023-08-16 4:42 ` [PATCH 3/7 v3] gdb: Add command 'maint set/show debuginfod download-sections' Aaron Merey
2023-08-16 12:45 ` Eli Zaretskii
2023-09-19 14:34 ` Aaron Merey
2023-09-28 18:32 ` Andrew Burgess [this message]
2023-10-02 18:08 ` Aaron Merey
2023-08-16 4:42 ` [PATCH 4/7 v5] gdb: Buffer output streams during events that might download debuginfo Aaron Merey
2023-09-19 14:34 ` Aaron Merey
2023-10-10 21:55 ` [PATCH v6] " Aaron Merey
2023-10-24 11:22 ` Andrew Burgess
2023-10-28 0:25 ` Aaron Merey
2023-08-16 4:42 ` [PATCH 5/7 v2] gdb/progspace: Add reverse safe iterator and template for unwrapping iterator Aaron Merey
2023-09-19 14:35 ` Aaron Merey
2023-10-10 21:56 ` [PING*2][PATCH " Aaron Merey
2023-08-16 4:42 ` [PATCH 6/7 v4] gdb/debuginfod: Support on-demand debuginfo downloading Aaron Merey
2023-09-19 14:35 ` Aaron Merey
2023-10-10 21:57 ` [PING*2][PATCH " Aaron Merey
2023-08-16 4:42 ` [PATCH 7/7 v4] gdb/debuginfod: Add .debug_line downloading Aaron Merey
2023-09-19 14:35 ` Aaron Merey
2023-10-10 21:58 ` [PING*2][PATCH " Aaron Merey
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