On Tue, 2024-01-30 at 09:01 +1000, Richard Henderson wrote:
> From: Ilya Leoshkevich <[email protected]>
>
> Make sure that qemu gdbstub, like gdbserver, allows reading from and
> writing to PROT_NONE pages.
>
> Signed-off-by: Ilya Leoshkevich <[email protected]>
> Message-Id: <[email protected]>
> Signed-off-by: Richard Henderson <[email protected]>
> ---
> tests/tcg/multiarch/prot-none.c | 40
> ++++++++++++++++++++++++
> tests/tcg/multiarch/Makefile.target | 9 +++++-
> tests/tcg/multiarch/gdbstub/prot-none.py | 36 +++++++++++++++++++++
> 3 files changed, 84 insertions(+), 1 deletion(-)
> create mode 100644 tests/tcg/multiarch/prot-none.c
> create mode 100644 tests/tcg/multiarch/gdbstub/prot-none.py
[...]
> diff --git a/tests/tcg/multiarch/gdbstub/prot-none.py
> b/tests/tcg/multiarch/gdbstub/prot-none.py
> new file mode 100644
> index 0000000000..e829d3ebc5
> --- /dev/null
> +++ b/tests/tcg/multiarch/gdbstub/prot-none.py
> @@ -0,0 +1,36 @@
> +"""Test that GDB can access PROT_NONE pages.
> +
> +This runs as a sourced script (via -x, via run-test.py).
> +
> +SPDX-License-Identifier: GPL-2.0-or-later
> +"""
> +import ctypes
> +from test_gdbstub import main, report
> +
> +
> +def probe_proc_self_mem():
> + buf = ctypes.create_string_buffer(b'aaa')
> + try:
> + with open("/proc/self/mem", "rb") as fp:
> + fp.seek(ctypes.addressof(buf))
> + return fp.read(3) == b'aaa'
> + except OSError:
> + return False
> +
> +
> +def run_test():
> + """Run through the tests one by one"""
> + if not probe_proc_self_mem:
I noticed that I made an embarrassing typo here: this should be
`not probe_proc_self_mem()`. I posted a v5 with the correction.
[...]
