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* [Bug gdb/29563] New: gdb: support zstd for SHF_COMPRESSED debug sections
@ 2022-09-09 20:02 i at maskray dot me
  2022-09-09 20:11 ` [Bug gdb/29563] " i at maskray dot me
                   ` (8 more replies)
  0 siblings, 9 replies; 10+ messages in thread
From: i at maskray dot me @ 2022-09-09 20:02 UTC (permalink / raw)
  To: gdb-prs

https://sourceware.org/bugzilla/show_bug.cgi?id=29563

            Bug ID: 29563
           Summary: gdb: support zstd for SHF_COMPRESSED debug sections
           Product: gdb
           Version: unknown
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: i at maskray dot me
  Target Milestone: ---

Zstandard is a "universal" compression algorithm which scales from
low-ratio-very-fast to high-ratio-pretty-slow.
The generic-abi proposal https://groups.google.com/g/generic-abi/c/satyPkuMisk
("Add new ch_type value: ELFCOMPRESS_ZSTD") has been approved.

See https://sourceware.org/bugzilla/show_bug.cgi?id=29397 for binutils feature
request.

gdb will need to support SHF_COMPRESSED (ch_type=ELFCOMPRESS_ZSTD) .debug_*
sections in executables, shared objects, and (split DWARF) .dwo files.

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* [Bug gdb/29563] gdb: support zstd for SHF_COMPRESSED debug sections
  2022-09-09 20:02 [Bug gdb/29563] New: gdb: support zstd for SHF_COMPRESSED debug sections i at maskray dot me
@ 2022-09-09 20:11 ` i at maskray dot me
  2022-09-09 20:18 ` dblaikie at gmail dot com
                   ` (7 subsequent siblings)
  8 siblings, 0 replies; 10+ messages in thread
From: i at maskray dot me @ 2022-09-09 20:11 UTC (permalink / raw)
  To: gdb-prs

https://sourceware.org/bugzilla/show_bug.cgi?id=29563

--- Comment #1 from Fangrui Song <i at maskray dot me> ---
llvm-project has some components supporting zstd now. Some instructions for
developers who want to test gdb's support:


git clone https://github.com/facebook/zstd
cd zstd
cmake -GNinja -Hbuild/cmake -Bout/release -DCMAKE_BUILD_TYPE=Release
-DCMAKE_INSTALL_PREFIX=/tmp/opt/zstd
make -j 8 install

# See https://llvm.org/docs/GettingStarted.html
# Example: cmake -GNinja -Sllvm -Bout/release -DCMAKE_BUILD_TYPE=Release
-DLLVM_ENABLE_PROJECTS='clang;lld' -DLLVM_ENABLE_ZSTD=FORCE_ON
-DCMAKE_PREFIX_PATH=/tmp/opt/zstd; ninja -C out/release llvm-objcopy clang lld

You can create zstd output with

out/release/bin/llvm-objcopy --compress-debug-sections=zstd a.out a.out.zstd

or out/release/bin/clang -fuse-ld=lld -gz=zstd a.o b.o ...

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* [Bug gdb/29563] gdb: support zstd for SHF_COMPRESSED debug sections
  2022-09-09 20:02 [Bug gdb/29563] New: gdb: support zstd for SHF_COMPRESSED debug sections i at maskray dot me
  2022-09-09 20:11 ` [Bug gdb/29563] " i at maskray dot me
@ 2022-09-09 20:18 ` dblaikie at gmail dot com
  2022-09-10  0:07 ` sam at gentoo dot org
                   ` (6 subsequent siblings)
  8 siblings, 0 replies; 10+ messages in thread
From: dblaikie at gmail dot com @ 2022-09-09 20:18 UTC (permalink / raw)
  To: gdb-prs

https://sourceware.org/bugzilla/show_bug.cgi?id=29563

David Blaikie <dblaikie at gmail dot com> changed:

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

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* [Bug gdb/29563] gdb: support zstd for SHF_COMPRESSED debug sections
  2022-09-09 20:02 [Bug gdb/29563] New: gdb: support zstd for SHF_COMPRESSED debug sections i at maskray dot me
  2022-09-09 20:11 ` [Bug gdb/29563] " i at maskray dot me
  2022-09-09 20:18 ` dblaikie at gmail dot com
@ 2022-09-10  0:07 ` sam at gentoo dot org
  2022-09-10 14:58 ` guillaume at morinfr dot org
                   ` (5 subsequent siblings)
  8 siblings, 0 replies; 10+ messages in thread
From: sam at gentoo dot org @ 2022-09-10  0:07 UTC (permalink / raw)
  To: gdb-prs

https://sourceware.org/bugzilla/show_bug.cgi?id=29563

Sam James <sam at gentoo dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |sam at gentoo dot org

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* [Bug gdb/29563] gdb: support zstd for SHF_COMPRESSED debug sections
  2022-09-09 20:02 [Bug gdb/29563] New: gdb: support zstd for SHF_COMPRESSED debug sections i at maskray dot me
                   ` (2 preceding siblings ...)
  2022-09-10  0:07 ` sam at gentoo dot org
@ 2022-09-10 14:58 ` guillaume at morinfr dot org
  2022-09-11 15:12 ` ssbssa at sourceware dot org
                   ` (4 subsequent siblings)
  8 siblings, 0 replies; 10+ messages in thread
From: guillaume at morinfr dot org @ 2022-09-10 14:58 UTC (permalink / raw)
  To: gdb-prs

https://sourceware.org/bugzilla/show_bug.cgi?id=29563

Guillaume Morin <guillaume at morinfr dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |guillaume at morinfr dot org

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* [Bug gdb/29563] gdb: support zstd for SHF_COMPRESSED debug sections
  2022-09-09 20:02 [Bug gdb/29563] New: gdb: support zstd for SHF_COMPRESSED debug sections i at maskray dot me
                   ` (3 preceding siblings ...)
  2022-09-10 14:58 ` guillaume at morinfr dot org
@ 2022-09-11 15:12 ` ssbssa at sourceware dot org
  2022-09-19  4:05 ` i at maskray dot me
                   ` (3 subsequent siblings)
  8 siblings, 0 replies; 10+ messages in thread
From: ssbssa at sourceware dot org @ 2022-09-11 15:12 UTC (permalink / raw)
  To: gdb-prs

https://sourceware.org/bugzilla/show_bug.cgi?id=29563

Hannes Domani <ssbssa at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ssbssa at sourceware dot org

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* [Bug gdb/29563] gdb: support zstd for SHF_COMPRESSED debug sections
  2022-09-09 20:02 [Bug gdb/29563] New: gdb: support zstd for SHF_COMPRESSED debug sections i at maskray dot me
                   ` (4 preceding siblings ...)
  2022-09-11 15:12 ` ssbssa at sourceware dot org
@ 2022-09-19  4:05 ` i at maskray dot me
  2022-09-19  4:24 ` i at maskray dot me
                   ` (2 subsequent siblings)
  8 siblings, 0 replies; 10+ messages in thread
From: i at maskray dot me @ 2022-09-19  4:05 UTC (permalink / raw)
  To: gdb-prs

https://sourceware.org/bugzilla/show_bug.cgi?id=29563

--- Comment #2 from Fangrui Song <i at maskray dot me> ---
Due to gdb's use of bfd/compress.c, this actually has to be supported in the
same patch that adds zstd support to bfd/.  Here it is.

https://sourceware.org/pipermail/gdb-patches/2022-September/191915.html [PATCH]
binutils, gdb: support zstd compressed debug sections

I have tested gdb with a zstd-compressed lld.

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* [Bug gdb/29563] gdb: support zstd for SHF_COMPRESSED debug sections
  2022-09-09 20:02 [Bug gdb/29563] New: gdb: support zstd for SHF_COMPRESSED debug sections i at maskray dot me
                   ` (5 preceding siblings ...)
  2022-09-19  4:05 ` i at maskray dot me
@ 2022-09-19  4:24 ` i at maskray dot me
  2022-09-27  2:54 ` i at maskray dot me
  2022-09-27  2:55 ` i at maskray dot me
  8 siblings, 0 replies; 10+ messages in thread
From: i at maskray dot me @ 2022-09-19  4:24 UTC (permalink / raw)
  To: gdb-prs

https://sourceware.org/bugzilla/show_bug.cgi?id=29563

Fangrui Song <i at maskray dot me> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |29584


Referenced Bugs:

https://sourceware.org/bugzilla/show_bug.cgi?id=29584
[Bug 29584] gdb: support zstd compressed .gnu_debugdata
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* [Bug gdb/29563] gdb: support zstd for SHF_COMPRESSED debug sections
  2022-09-09 20:02 [Bug gdb/29563] New: gdb: support zstd for SHF_COMPRESSED debug sections i at maskray dot me
                   ` (6 preceding siblings ...)
  2022-09-19  4:24 ` i at maskray dot me
@ 2022-09-27  2:54 ` i at maskray dot me
  2022-09-27  2:55 ` i at maskray dot me
  8 siblings, 0 replies; 10+ messages in thread
From: i at maskray dot me @ 2022-09-27  2:54 UTC (permalink / raw)
  To: gdb-prs

https://sourceware.org/bugzilla/show_bug.cgi?id=29563

Fangrui Song <i at maskray dot me> changed:

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

--- Comment #3 from Fangrui Song <i at maskray dot me> ---
Closed by
https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=2cac01e3ffff74898c54fa5e6418817f5578adb6
"binutils, gdb: support zstd compressed debug sections"

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* [Bug gdb/29563] gdb: support zstd for SHF_COMPRESSED debug sections
  2022-09-09 20:02 [Bug gdb/29563] New: gdb: support zstd for SHF_COMPRESSED debug sections i at maskray dot me
                   ` (7 preceding siblings ...)
  2022-09-27  2:54 ` i at maskray dot me
@ 2022-09-27  2:55 ` i at maskray dot me
  8 siblings, 0 replies; 10+ messages in thread
From: i at maskray dot me @ 2022-09-27  2:55 UTC (permalink / raw)
  To: gdb-prs

https://sourceware.org/bugzilla/show_bug.cgi?id=29563

Fangrui Song <i at maskray dot me> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |13.1

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end of thread, other threads:[~2022-09-27  2:55 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
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2022-09-09 20:02 [Bug gdb/29563] New: gdb: support zstd for SHF_COMPRESSED debug sections i at maskray dot me
2022-09-09 20:11 ` [Bug gdb/29563] " i at maskray dot me
2022-09-09 20:18 ` dblaikie at gmail dot com
2022-09-10  0:07 ` sam at gentoo dot org
2022-09-10 14:58 ` guillaume at morinfr dot org
2022-09-11 15:12 ` ssbssa at sourceware dot org
2022-09-19  4:05 ` i at maskray dot me
2022-09-19  4:24 ` i at maskray dot me
2022-09-27  2:54 ` i at maskray dot me
2022-09-27  2:55 ` i at maskray dot me

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