[Tarantool-patches] [PATCH luajit 0/3] Fix sysprof crash due to insufficient free disk space

[Sergey Bronnikov via Tarantool-patches <tarantool-patches@dev.tarantool.org>]

The patch series adds a unit test for lj_wbuf.c file, a patch
with fix for sysprof crash with regression test and a fix for
release resources on a halted profiler.

Unfortunately, we don't have a unit test for lj_wbuf, so before
applying the fix for sysprof, I decided to add a test that
provides not just line code coverage, but also branch coverage.

The LuaJIT code coverage before (master):
https://github.com/tarantool/luajit/actions/runs/38898752231/job/116965510306

lines: 93.0% (21919 out of 23560)
functions: 95.0% (1448 out of 1524)
branches: 80.9% (12757 out of 15761)

The LuaJIT code coverage after (gh-11620-insufficient-free-disk-space-sysprof):

lines: 93.2% (21951 out of 23564)
functions: 95.1% (1449 out of 1524)
branches: 80.9% (12768 out of 15777)

CI: https://github.com/tarantool/luajit/tree/ligurio/gh-11620-insufficient-free-disk-space-sysprof

Related links:
- https://github.com/tarantool/tarantool/issues/11620
- https://coveralls.io/github/tarantool/luajit?branch=ligurio/gh-11620-insufficient-free-disk-space-sysprof

Sergey Bronnikov (3):
  test: add unit tests for the write buffer
  sysprof: fix crash on a failed stream flush
  sysprof: release resources on a halted profiler

 src/lj_sysprof.c                              |   4 +-
 src/lj_wbuf.c                                 |  20 +-
 .../gh-11620-sysprof-enospc-crash.test.c      | 182 +++++++
 test/tarantool-c-tests/unit-wbuf.test.c       | 490 ++++++++++++++++++
 4 files changed, 691 insertions(+), 5 deletions(-)
 create mode 100644 test/tarantool-c-tests/gh-11620-sysprof-enospc-crash.test.c
 create mode 100644 test/tarantool-c-tests/unit-wbuf.test.c

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