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[v3,0/3] linux-user: Allow gdbstub to ignore page protection

Message ID 20240116003551.75168-1-iii@linux.ibm.com (mailing list archive)
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Series linux-user: Allow gdbstub to ignore page protection | expand

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Ilya Leoshkevich Jan. 16, 2024, 12:31 a.m. UTC 
v2: https://lists.gnu.org/archive/html/qemu-devel/2024-01/msg01592.html
v2 -> v3: Add Richard's R-b on [1/3].
          Fix printing the architecture name and the number of failures
          in test_gdbstub.py.
          Patches that need review: [2/3] and [3/3].

v1: https://lists.gnu.org/archive/html/qemu-devel/2024-01/msg01314.html
v1 -> v2: Use /proc/self/mem as a fallback. Handle TB invalidation
          (Richard).
          Test cross-page accesses.

RFC: https://lists.gnu.org/archive/html/qemu-devel/2023-12/msg02044.html
RFC -> v1: Use /proc/self/mem and accept that this will not work
           without /proc.
           Factor out a couple functions for gdbstub testing.
           Add a test.

Hi,

I've noticed that gdbstub behaves differently from gdbserver in that it
doesn't allow reading non-readable pages. This series improves the
situation by using the same mechanism as gdbserver: /proc/self/mem.

Best regards,
Ilya

Ilya Leoshkevich (3):
  linux-user: Allow gdbstub to ignore page protection
  tests/tcg: Factor out gdbstub test functions
  tests/tcg: Add the PROT_NONE gdbstub test

 cpu-target.c                                  | 76 +++++++++++++++----
 tests/guest-debug/run-test.py                 |  7 +-
 tests/guest-debug/test_gdbstub.py             | 58 ++++++++++++++
 tests/tcg/aarch64/gdbstub/test-sve-ioctl.py   | 34 +--------
 tests/tcg/aarch64/gdbstub/test-sve.py         | 33 +-------
 tests/tcg/multiarch/Makefile.target           |  9 ++-
 tests/tcg/multiarch/gdbstub/interrupt.py      | 47 ++----------
 tests/tcg/multiarch/gdbstub/memory.py         | 41 +---------
 tests/tcg/multiarch/gdbstub/prot-none.py      | 22 ++++++
 tests/tcg/multiarch/gdbstub/registers.py      | 41 ++--------
 tests/tcg/multiarch/gdbstub/sha1.py           | 40 ++--------
 .../multiarch/gdbstub/test-proc-mappings.py   | 39 +---------
 .../multiarch/gdbstub/test-qxfer-auxv-read.py | 37 +--------
 .../gdbstub/test-thread-breakpoint.py         | 37 +--------
 tests/tcg/multiarch/prot-none.c               | 40 ++++++++++
 tests/tcg/s390x/gdbstub/test-signals-s390x.py | 42 +---------
 tests/tcg/s390x/gdbstub/test-svc.py           | 39 +---------
 17 files changed, 229 insertions(+), 413 deletions(-)
 create mode 100644 tests/guest-debug/test_gdbstub.py
 create mode 100644 tests/tcg/multiarch/gdbstub/prot-none.py
 create mode 100644 tests/tcg/multiarch/prot-none.c