[PATCH v1 00/10] gdb: bugfix 31207 and various refactoring in linux-tdep

[Matthieu Longo <matthieu.longo@arm.com>]

This patch series contains:
- a fix for bug 31207.
- a number of refactorings in linux-tdep, and the way procfs files are read.
- preparatory changes for upcoming AArch64 features support (POE, a.k.a Memory Protection Keys [2]
  and POE2) in GDB:
  - parsing of ProtectionKey field in /proc/PID/smaps
  - helpers to read AT_HWCAP3 and AT_HWCAP4

This is a spin-off of a previous patch series [3] where patches 1/8 and 4/8 were abandoned.
Also on demand of Yury Khrustalev, a helper for AT_HWCAP4 was added.
Thanks to Linaro's CIs, a regression was detected in test gcore-stale-thread and after investigation,
the root cause appears to be the same as bug 31207. Patch 2/10 address the root cause, and 7/10 fixes
a discovered issue in the logic of linux_find_memory_regions_full if an reading issue occurs.

All changes were tested by building GDB on x86_64 and AArch64 and running the existing GDB testsuite.

[1]: https://sourceware.org/bugzilla/show_bug.cgi?id=31207
[2]: https://docs.kernel.org/core-api/protection-keys.html
[3]: https://inbox.sourceware.org/gdb-patches/20260703185853.450440-1-matthieu.longo@arm.com/

Regards,
Matthieu


Matthieu Longo (10):
  gdb/linux-tdep: change linux_fill_prpsinfo to return bool
  gdb: rely on the first alive thread TPID when reading Linux procfs files
  target_fileio_read_stralloc: add an optional length parameter
  gdb support: add gdb::replace algorithm for iterators and ranges
  gdb: introduce helper class file_reader_t
  gdb/linux-tdep: migrate linux_info_proc to file_reader_t
  gdb/linux-tdep: migrate linux_find_memory_regions_full to file_reader_t
  gdb/linux-tdep: migrate parse_smaps_data to file_reader_t
  gdb/linux-tdep: parse ProtectionKey in /proc/PID/smaps
  gdb/linux: add helpers to read AT_HWCAP3 and AT_HWCAP4

 gdb/amd64-linux-tdep.c  |  12 +-
 gdb/inferior.c          |  12 ++
 gdb/inferior.h          |   9 +
 gdb/linux-tdep.c        | 356 ++++++++++++++++++++++------------------
 gdb/linux-tdep.h        |  22 +++
 gdb/sparc64-tdep.c      |  12 +-
 gdb/target.c            |  10 +-
 gdb/target.h            |  67 +++++++-
 gdbserver/linux-low.cc  |  28 ++++
 gdbserver/linux-low.h   |   8 +
 gdbsupport/array-view.h |  26 +++
 11 files changed, 386 insertions(+), 176 deletions(-)

-- 
2.55.0