[bluez/bluez] 7856c9: tools/test-runner: replace alloca() based argv setup

[bluez/bluez] 7856c9: tools/test-runner: replace alloca() based argv setup

[Pauli Virtanen]

  Branch: refs/heads/master
  Home:   https://github.com/bluez/bluez
  Commit: 7856c910c27da2b61fbb64db15cf243375990732
      https://github.com/bluez/bluez/commit/7856c910c27da2b61fbb64db15cf243375990732
  Author: Pauli Virtanen <pav@iki.fi>
  Date:   2026-09-14 (Mon, 14 Sep 2026)

  Changed paths:
    M tools/test-runner.c

  Log Message:
  -----------
  tools/test-runner: replace alloca() based argv setup

Rewrite alloca() based argv array construction that required manual size
counting with vasprintf string array. This allows splitting start_qemu()
to multiple functions.


  Commit: 67e1394c80547a6eb87486cd5bf83150da36d5f9
      https://github.com/bluez/bluez/commit/67e1394c80547a6eb87486cd5bf83150da36d5f9
  Author: Pauli Virtanen <pav@iki.fi>
  Date:   2026-09-14 (Mon, 14 Sep 2026)

  Changed paths:
    M doc/ci.config
    M doc/tester.config

  Log Message:
  -----------
  doc: enable virtio-fs in tester kernel configs

Add support for virtio-fs in tester configs.


  Commit: 6c1985716322b5574c5f3b8107fad8260939465c
      https://github.com/bluez/bluez/commit/6c1985716322b5574c5f3b8107fad8260939465c
  Author: Pauli Virtanen <pav@iki.fi>
  Date:   2026-09-14 (Mon, 14 Sep 2026)

  Changed paths:
    M doc/test-runner.rst
    M tools/test-runner.c

  Log Message:
  -----------
  tools/test-runner: use virtiofsd for filesystem passthrough

The 9p mount passthrough I/O is fairly CPU hungry and slow. This matters
for e.g. running Python in test-runner, since it has to read some amount
of files for startup.

Add support for virtio-fs, which is significantly less CPU intensive.

Enable it by default if /usr/libexec/virtiofsd is available, fall back
to 9p if virtiofsd not usable.

Before:
$ time make check-functional
real	2m9,736s
user	1m29,570s
sys	0m32,715s

After:
$ time make check-functional
real	1m35,703s
user	0m28,938s
sys	0m7,453s


  Commit: c8e2b951b07fc9b84fa7f3e70dcde2b61aab3ad8
      https://github.com/bluez/bluez/commit/c8e2b951b07fc9b84fa7f3e70dcde2b61aab3ad8
  Author: Pauli Virtanen <pav@iki.fi>
  Date:   2026-09-14 (Mon, 14 Sep 2026)

  Changed paths:
    M tools/test-runner.c

  Log Message:
  -----------
  tools/test-runner: Fix CPUID register clobbers

CPUID modifies EAX, EBX, ECX and EDX, but the inline asm clobber list is
incomplete.  Use the __get_cpuid() intrinsic instead.

Fixes rootfs_setup(r, argv) crashing due to impossible r != &rootfs due
to clobbered registers.

Assisted-by: qwen3.8-flash-next  # finding the bug


Compare: https://github.com/bluez/bluez/compare/61a2b3d93897...c8e2b951b07f

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