[PATCH v2 0/5] glibc: Add SFrame support for stack backtracing

[claudiu.zissulescu-ianculescu@oracle.com]

From: Claudiu Zissulescu <claudiu.zissulescu-ianculescu@oracle.com>

Hello,

Please find my second round of SFrame stack backtracing.

ABI impact notes:
** Changes in 'struct dl_find_object'
 - A new member 'void *dlfo_sframe' is inserted to the structure.
 
 - The member '__dlfo_reserved' is changed, removing one element, which
   is a decrease of 64bits.
 
 - The size of the type has not changed, as the new added field (i.e.,
   dlfo_sframe) size is of the same size as of the one element removed
   from struct memeber __dlfo_reserved. For 32bit systems, a padding is
   added to compensate for pointer size change.
 
** Possible issues
 - Automatic ABI checkers may mark this change as an ABI change, thus,
   human review and updating of the scripts is required.
 
 - For unknown programs which directly access the '__dlfo_reserved'
   field, this change is incompatible. As note, this field should not
   be used by anyone as it is reserved for further changes of the
   dl_find_object structure.

Other changes:

 - The getPC and getSP helper functions are moved to sframe.c file as
   they may require machine dependent changes like for s390.

 - The dlfo_sframe member is always present.

 - The dlfo_flags member is used, bit 0 signalize the presence of
   sframe information.

 - Updated NEWS file, and other documents.

 - Cleanup Aarch64 specific function.

Thank you,
Claudiu


Claudiu Zissulescu (5):
  elf: Add SFrame support to _dl_find_object function
  elf: Add SFrame stack tracing
  configure: Add --enable-sframe option
  x86: Add SFrame support for x86 architecture
  aarch64: Add SFrame support for aarch64 architecture

 INSTALL                                       |   5 +
 Makeconfig                                    |   8 +-
 NEWS                                          |   2 +
 bits/dl_find_object.h                         |   3 +
 config.make.in                                |   1 +
 configure                                     | 128 ++++
 configure.ac                                  |  43 ++
 debug/backtrace.c                             |  32 +-
 dlfcn/dlfcn.h                                 |   7 +-
 elf/dl-find_object.h                          |  44 +-
 manual/dynlink.texi                           |  25 +-
 manual/install.texi                           |   5 +
 sysdeps/generic/Makefile                      |   1 +
 sysdeps/generic/sframe-read.c                 | 577 ++++++++++++++++++
 sysdeps/generic/sframe-read.h                 | 101 +++
 sysdeps/generic/sframe.c                      | 157 +++++
 sysdeps/generic/sframe.h                      | 367 +++++++++++
 sysdeps/generic/uw-sigframe.h                 |  17 +
 sysdeps/unix/sysv/linux/aarch64/uw-sigframe.h |  63 ++
 sysdeps/unix/sysv/linux/x86/uw-sigframe.h     |  99 +++
 sysdeps/x86/bits/dl_find_object.h             |   1 +
 21 files changed, 1672 insertions(+), 14 deletions(-)
 create mode 100644 sysdeps/generic/sframe-read.c
 create mode 100644 sysdeps/generic/sframe-read.h
 create mode 100644 sysdeps/generic/sframe.c
 create mode 100644 sysdeps/generic/sframe.h
 create mode 100644 sysdeps/generic/uw-sigframe.h
 create mode 100644 sysdeps/unix/sysv/linux/aarch64/uw-sigframe.h
 create mode 100644 sysdeps/unix/sysv/linux/x86/uw-sigframe.h

-- 
2.49.0