[PATCH,V5 00/10] Definition and Implementation of CTF Frame format

Indu Bhagat indu.bhagat@oracle.com
Sun Jul 17 08:20:01 GMT 2022


Hi,

This is version 5 of the previously sent RFC series.

Initial (V1) posting contains necessary introductions:
https://sourceware.org/pipermail/binutils/2022-May/120731.html
V2 posting with some improvements:
https://sourceware.org/pipermail/binutils/2022-May/120899.html
V3 posting with further improvements:
https://sourceware.org/pipermail/binutils/2022-June/121245.html
V4 posting with further improvements and bugfixes:
https://sourceware.org/pipermail/binutils/2022-June/121478.html

The commit log of each patch in the current patch series specifies the changes
from the version V4 of the respective patch.  Briefly, following are the main 
changes in the current version V5 as compared to V4:

1. Assembler testsuite has additional testcases.  In general, the
as/ld/unwinder support for CTF Frame format has been further tested in this
version of the patch series for both x86_64 and aarch64.
2. libctfbacktrace is the library which provides a simple unwinder based on CTF
Frame.  The current patch series now includes a testsuite for the unwinder
based on CTF Frame.

CTF Frame support V5 patch series has been regression tested on a host of
targets with no regressions.

Important note: libctfframe/configure has NOT been included in the patch
series, as it causes the size of some patches to go beyond the allowed limit.
Please regenerate the libctfframe/configure after applying the series.

Please comment and provide feedback, it will help shape the format.  One of the
outstanding item where feedback from folks will help is:

1. What is a good place for an unwinder based on CTF Frame format ? Currently
to facilitate discussion, it is presented in a library of its own:
libctfbacktrace which, in turn, uses the libctfframe library for decoding the
.ctf_frame section for unwinding.  We brainstormed a bit about the possible
candidates being libbacktace, libgcc or libunwind ? Are there any
recommendations ?

Thanks,

Indu Bhagat (7):
  ctf-frame.h: Add CTF Frame format definition
  gas: add new command line option --gctf-frame
  gas: generate .ctf_frame
  libctfframe: add GNU poke pickles for CTF Frame
  bfd: linker: merge .ctf_frame sections
  readelf/objdump: support for CTF Frame section
  gdb: sim: buildsystem changes to accommodate libctfframe

Weimin Pan (3):
  libctfframe: add the CTF Frame library
  unwinder: generate backtrace using CTF Frame format
  unwinder: Add CTF Frame unwinder tests

 Makefile.def                                  |    5 +
 Makefile.in                                   | 1289 +++++++++++++-
 bfd/Makefile.am                               |    6 +-
 bfd/Makefile.in                               |    7 +-
 bfd/bfd-in2.h                                 |    1 +
 bfd/configure                                 |    2 +-
 bfd/configure.ac                              |    2 +-
 bfd/elf-bfd.h                                 |   55 +
 bfd/elf-ctf-frame.c                           |  529 ++++++
 bfd/elf.c                                     |   32 +
 bfd/elf64-x86-64.c                            |   97 +-
 bfd/elflink.c                                 |   52 +
 bfd/elfxx-x86.c                               |  379 +++-
 bfd/elfxx-x86.h                               |   46 +
 bfd/section.c                                 |    1 +
 binutils/Makefile.am                          |   10 +-
 binutils/Makefile.in                          |   10 +-
 binutils/doc/binutils.texi                    |    4 +
 binutils/doc/ctfframe.options.texi            |   10 +
 binutils/objdump.c                            |   76 +
 binutils/readelf.c                            |   47 +
 config/ctf-frame.m4                           |   16 +
 configure                                     |    2 +-
 configure.ac                                  |    2 +-
 gas/Makefile.am                               |    3 +
 gas/Makefile.in                               |   23 +-
 gas/as.c                                      |   10 +-
 gas/as.h                                      |   13 +-
 gas/config/tc-aarch64.c                       |   42 +
 gas/config/tc-aarch64.h                       |   29 +
 gas/config/tc-i386.c                          |   46 +
 gas/config/tc-i386.h                          |   26 +
 gas/config/tc-xtensa.c                        |    1 +
 gas/ctf-frame-opt.c                           |  158 ++
 gas/doc/as.texi                               |   19 +-
 gas/dw2gencfi.c                               |   30 +
 gas/dw2gencfi.h                               |    1 +
 gas/gen-ctf-frame.c                           | 1297 ++++++++++++++
 gas/gen-ctf-frame.h                           |  142 ++
 gas/testsuite/gas/cfi-ctf/cfi-ctf-aarch64-1.d |   20 +
 gas/testsuite/gas/cfi-ctf/cfi-ctf-aarch64-1.s |   61 +
 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-1.d  |   17 +
 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-1.s  |    3 +
 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-2.d  |   17 +
 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-2.s  |    2 +
 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-3.d  |   17 +
 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-3.s  |    4 +
 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-4.d  |   21 +
 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-4.s  |    8 +
 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-5.d  |   21 +
 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-5.s  |    7 +
 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-6.d  |   21 +
 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-6.s  |    7 +
 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-7.d  |   21 +
 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-7.s  |    7 +
 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-8.d  |   20 +
 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-8.s  |   12 +
 gas/testsuite/gas/cfi-ctf/cfi-ctf-x86_64-1.d  |   22 +
 gas/testsuite/gas/cfi-ctf/cfi-ctf-x86_64-1.s  |   30 +
 gas/testsuite/gas/cfi-ctf/cfi-ctf.exp         |   58 +
 gas/testsuite/gas/cfi-ctf/common-empty-1.d    |   14 +
 gas/testsuite/gas/cfi-ctf/common-empty-1.s    |    5 +
 gas/testsuite/gas/cfi-ctf/common-empty-2.d    |   14 +
 gas/testsuite/gas/cfi-ctf/common-empty-2.s    |    8 +
 gas/testsuite/gas/cfi-ctf/common-empty-3.d    |   14 +
 gas/testsuite/gas/cfi-ctf/common-empty-3.s    |    9 +
 gas/testsuite/gas/cfi-ctf/common-empty-4.d    |   14 +
 gas/testsuite/gas/cfi-ctf/common-empty-4.s    |   18 +
 gas/write.c                                   |   13 +
 gdb/Makefile.in                               |    8 +-
 gdb/acinclude.m4                              |    4 +-
 gdb/configure                                 |   35 +-
 gdb/configure.ac                              |   11 +
 include/ctf-backtrace-api.h                   |   57 +
 include/ctf-frame-api.h                       |  213 +++
 include/ctf-frame.h                           |  281 +++
 include/elf/common.h                          |    1 +
 include/elf/internal.h                        |    1 +
 ld/Makefile.am                                |    2 +
 ld/Makefile.in                                |    2 +
 ld/configure                                  |    8 +-
 ld/configure.ac                               |    3 +
 ld/ld.texi                                    |    4 +-
 ld/scripttempl/elf.sc                         |    2 +
 ld/testsuite/ld-aarch64/aarch64-elf.exp       |    2 +
 ld/testsuite/ld-aarch64/ctf-frame-bar.s       |    7 +
 ld/testsuite/ld-aarch64/ctf-frame-foo.s       |   10 +
 ld/testsuite/ld-aarch64/ctf-frame-simple-1.d  |   26 +
 ld/testsuite/ld-bootstrap/bootstrap.exp       |    8 +-
 ld/testsuite/ld-ctf-frame/ctf-frame-empty.d   |   10 +
 ld/testsuite/ld-ctf-frame/ctf-frame-empty.s   |    2 +
 ld/testsuite/ld-ctf-frame/ctf-frame.exp       |   47 +
 ld/testsuite/ld-ctf-frame/discard.d           |   10 +
 ld/testsuite/ld-ctf-frame/discard.ld          |    9 +
 ld/testsuite/ld-ctf-frame/discard.s           |   13 +
 ld/testsuite/ld-x86-64/ctf-frame-bar.s        |   31 +
 ld/testsuite/ld-x86-64/ctf-frame-foo.s        |   37 +
 ld/testsuite/ld-x86-64/ctf-frame-plt-1.d      |   29 +
 ld/testsuite/ld-x86-64/ctf-frame-simple-1.d   |   35 +
 ld/testsuite/ld-x86-64/x86-64.exp             |    2 +
 ld/testsuite/lib/ld-lib.exp                   |   45 +
 libctfframe/Makefile.am                       |   84 +
 libctfframe/Makefile.in                       | 1050 +++++++++++
 libctfframe/aclocal.m4                        | 1242 +++++++++++++
 libctfframe/config.h.in                       |  144 ++
 libctfframe/configure.ac                      |   82 +
 libctfframe/ctf-backtrace-err.c               |   46 +
 libctfframe/ctf-backtrace.c                   |  617 +++++++
 libctfframe/ctf-frame-dump.c                  |  181 ++
 libctfframe/ctf-frame-dump.pk                 |   68 +
 libctfframe/ctf-frame-error.c                 |   49 +
 libctfframe/ctf-frame-impl.h                  |   55 +
 libctfframe/ctf-frame.c                       | 1584 +++++++++++++++++
 libctfframe/ctf-frame.pk                      |  200 +++
 libctfframe/testsuite/config/default.exp      |   60 +
 libctfframe/testsuite/lib/ctfframe-lib.exp    |  333 ++++
 .../testsuite/libctfframe.decode/DATA1        |  Bin 0 -> 59 bytes
 .../testsuite/libctfframe.decode/DATA2        |  Bin 0 -> 91 bytes
 .../testsuite/libctfframe.decode/DATA_BIGE    |  Bin 0 -> 59 bytes
 .../libctfframe.decode/bigendian_data.c       |  110 ++
 .../libctfframe.decode/bigendian_data.lk      |    3 +
 .../testsuite/libctfframe.decode/decode.exp   |   38 +
 .../testsuite/libctfframe.decode/frecnt_1.c   |  108 ++
 .../testsuite/libctfframe.decode/frecnt_1.lk  |    3 +
 .../testsuite/libctfframe.decode/frecnt_2.c   |  113 ++
 .../testsuite/libctfframe.decode/frecnt_2.lk  |    3 +
 .../testsuite/libctfframe.encode/encode.exp   |   38 +
 .../testsuite/libctfframe.encode/encode_1.c   |  173 ++
 .../testsuite/libctfframe.encode/encode_1.lk  |    3 +
 .../testsuite/libctfframe.unwind/backtrace.c  |  101 ++
 .../testsuite/libctfframe.unwind/backtrace.lk |    3 +
 .../libctfframe.unwind/inline-cmds.c          |  135 ++
 .../libctfframe.unwind/inline-cmds.lk         |    3 +
 .../testsuite/libctfframe.unwind/inline.c     |   97 +
 .../testsuite/libctfframe.unwind/inline.lk    |    3 +
 .../testsuite/libctfframe.unwind/solib-lib1.c |    8 +
 .../testsuite/libctfframe.unwind/solib-lib2.c |   50 +
 .../testsuite/libctfframe.unwind/solib-main.c |   47 +
 .../testsuite/libctfframe.unwind/solib.exp    |   68 +
 .../testsuite/libctfframe.unwind/solib_lib1.h |    3 +
 .../testsuite/libctfframe.unwind/solib_lib2.h |    3 +
 .../testsuite/libctfframe.unwind/tailcall.c   |  103 ++
 .../testsuite/libctfframe.unwind/tailcall.lk  |    3 +
 .../testsuite/libctfframe.unwind/ttest.c      |  127 ++
 .../testsuite/libctfframe.unwind/ttest.lk     |    3 +
 .../testsuite/libctfframe.unwind/unwind.exp   |  189 ++
 libctfframe/ttest.c                           |   78 +
 sim/common/Make-common.in                     |    7 +-
 148 files changed, 13340 insertions(+), 58 deletions(-)
 create mode 100644 bfd/elf-ctf-frame.c
 create mode 100644 binutils/doc/ctfframe.options.texi
 create mode 100644 config/ctf-frame.m4
 create mode 100644 gas/ctf-frame-opt.c
 create mode 100644 gas/gen-ctf-frame.c
 create mode 100644 gas/gen-ctf-frame.h
 create mode 100644 gas/testsuite/gas/cfi-ctf/cfi-ctf-aarch64-1.d
 create mode 100644 gas/testsuite/gas/cfi-ctf/cfi-ctf-aarch64-1.s
 create mode 100644 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-1.d
 create mode 100644 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-1.s
 create mode 100644 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-2.d
 create mode 100644 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-2.s
 create mode 100644 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-3.d
 create mode 100644 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-3.s
 create mode 100644 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-4.d
 create mode 100644 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-4.s
 create mode 100644 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-5.d
 create mode 100644 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-5.s
 create mode 100644 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-6.d
 create mode 100644 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-6.s
 create mode 100644 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-7.d
 create mode 100644 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-7.s
 create mode 100644 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-8.d
 create mode 100644 gas/testsuite/gas/cfi-ctf/cfi-ctf-common-8.s
 create mode 100644 gas/testsuite/gas/cfi-ctf/cfi-ctf-x86_64-1.d
 create mode 100644 gas/testsuite/gas/cfi-ctf/cfi-ctf-x86_64-1.s
 create mode 100644 gas/testsuite/gas/cfi-ctf/cfi-ctf.exp
 create mode 100644 gas/testsuite/gas/cfi-ctf/common-empty-1.d
 create mode 100644 gas/testsuite/gas/cfi-ctf/common-empty-1.s
 create mode 100644 gas/testsuite/gas/cfi-ctf/common-empty-2.d
 create mode 100644 gas/testsuite/gas/cfi-ctf/common-empty-2.s
 create mode 100644 gas/testsuite/gas/cfi-ctf/common-empty-3.d
 create mode 100644 gas/testsuite/gas/cfi-ctf/common-empty-3.s
 create mode 100644 gas/testsuite/gas/cfi-ctf/common-empty-4.d
 create mode 100644 gas/testsuite/gas/cfi-ctf/common-empty-4.s
 create mode 100644 include/ctf-backtrace-api.h
 create mode 100644 include/ctf-frame-api.h
 create mode 100644 include/ctf-frame.h
 create mode 100644 ld/testsuite/ld-aarch64/ctf-frame-bar.s
 create mode 100644 ld/testsuite/ld-aarch64/ctf-frame-foo.s
 create mode 100644 ld/testsuite/ld-aarch64/ctf-frame-simple-1.d
 create mode 100644 ld/testsuite/ld-ctf-frame/ctf-frame-empty.d
 create mode 100644 ld/testsuite/ld-ctf-frame/ctf-frame-empty.s
 create mode 100644 ld/testsuite/ld-ctf-frame/ctf-frame.exp
 create mode 100644 ld/testsuite/ld-ctf-frame/discard.d
 create mode 100644 ld/testsuite/ld-ctf-frame/discard.ld
 create mode 100644 ld/testsuite/ld-ctf-frame/discard.s
 create mode 100644 ld/testsuite/ld-x86-64/ctf-frame-bar.s
 create mode 100644 ld/testsuite/ld-x86-64/ctf-frame-foo.s
 create mode 100644 ld/testsuite/ld-x86-64/ctf-frame-plt-1.d
 create mode 100644 ld/testsuite/ld-x86-64/ctf-frame-simple-1.d
 create mode 100644 libctfframe/Makefile.am
 create mode 100644 libctfframe/Makefile.in
 create mode 100644 libctfframe/aclocal.m4
 create mode 100644 libctfframe/config.h.in
 create mode 100644 libctfframe/configure.ac
 create mode 100644 libctfframe/ctf-backtrace-err.c
 create mode 100644 libctfframe/ctf-backtrace.c
 create mode 100644 libctfframe/ctf-frame-dump.c
 create mode 100644 libctfframe/ctf-frame-dump.pk
 create mode 100644 libctfframe/ctf-frame-error.c
 create mode 100644 libctfframe/ctf-frame-impl.h
 create mode 100644 libctfframe/ctf-frame.c
 create mode 100644 libctfframe/ctf-frame.pk
 create mode 100644 libctfframe/testsuite/config/default.exp
 create mode 100644 libctfframe/testsuite/lib/ctfframe-lib.exp
 create mode 100644 libctfframe/testsuite/libctfframe.decode/DATA1
 create mode 100644 libctfframe/testsuite/libctfframe.decode/DATA2
 create mode 100644 libctfframe/testsuite/libctfframe.decode/DATA_BIGE
 create mode 100644 libctfframe/testsuite/libctfframe.decode/bigendian_data.c
 create mode 100644 libctfframe/testsuite/libctfframe.decode/bigendian_data.lk
 create mode 100644 libctfframe/testsuite/libctfframe.decode/decode.exp
 create mode 100644 libctfframe/testsuite/libctfframe.decode/frecnt_1.c
 create mode 100644 libctfframe/testsuite/libctfframe.decode/frecnt_1.lk
 create mode 100644 libctfframe/testsuite/libctfframe.decode/frecnt_2.c
 create mode 100644 libctfframe/testsuite/libctfframe.decode/frecnt_2.lk
 create mode 100644 libctfframe/testsuite/libctfframe.encode/encode.exp
 create mode 100644 libctfframe/testsuite/libctfframe.encode/encode_1.c
 create mode 100644 libctfframe/testsuite/libctfframe.encode/encode_1.lk
 create mode 100644 libctfframe/testsuite/libctfframe.unwind/backtrace.c
 create mode 100644 libctfframe/testsuite/libctfframe.unwind/backtrace.lk
 create mode 100644 libctfframe/testsuite/libctfframe.unwind/inline-cmds.c
 create mode 100644 libctfframe/testsuite/libctfframe.unwind/inline-cmds.lk
 create mode 100644 libctfframe/testsuite/libctfframe.unwind/inline.c
 create mode 100644 libctfframe/testsuite/libctfframe.unwind/inline.lk
 create mode 100644 libctfframe/testsuite/libctfframe.unwind/solib-lib1.c
 create mode 100644 libctfframe/testsuite/libctfframe.unwind/solib-lib2.c
 create mode 100644 libctfframe/testsuite/libctfframe.unwind/solib-main.c
 create mode 100644 libctfframe/testsuite/libctfframe.unwind/solib.exp
 create mode 100644 libctfframe/testsuite/libctfframe.unwind/solib_lib1.h
 create mode 100644 libctfframe/testsuite/libctfframe.unwind/solib_lib2.h
 create mode 100644 libctfframe/testsuite/libctfframe.unwind/tailcall.c
 create mode 100644 libctfframe/testsuite/libctfframe.unwind/tailcall.lk
 create mode 100644 libctfframe/testsuite/libctfframe.unwind/ttest.c
 create mode 100644 libctfframe/testsuite/libctfframe.unwind/ttest.lk
 create mode 100644 libctfframe/testsuite/libctfframe.unwind/unwind.exp
 create mode 100644 libctfframe/ttest.c

-- 
2.31.1



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