[Tarantool-patches] [PATCH luajit 0/2] Use ptrace for sysprof tests

[Igor Munkin via Tarantool-patches <tarantool-patches@dev.tarantool.org>]

Hello there,

The latter patch of the patchset provides the new approach for
deterministic testing for our sampling profiler. See more info in the
commit message.

The first patch fixes the issue occurred while reimplementing the
sysprof test via fork(3) + ptrace(2): the output for prove was buffered
and hence duplicated when fork is done. I decided to turn of buffering
at all, since there is little sense in it for tests and nobody wants to
debug many (still unrevealed) related problems.

I hope the approach will be moved to our utils for tests written in C,
but I do not see the whole picture at the moment, so the approach is
implemented for the only test being affected by the patch for #8594.

Branch: https://github.com/tarantool/luajit/commits/imun/sysprof-ptrace-ffunc-test
CI: https://github.com/tarantool/luajit/commit/b48b905
Tarantool CI: https://github.com/tarantool/tarantool/pull/9424
Related issues:
* https://github.com/tarantool/tarantool/issues/9387
* https://github.com/tarantool/tarantool/issues/8594
* https://github.com/tarantool/tarantool/issues/7900

Igor Munkin (2):
  test: disable buffering for the C test engine
  test: rewrite sysprof test using managed execution

 .../gh-8594-sysprof-ffunc-crash.test.c        | 269 ++++++++++++++++++
 test/tarantool-c-tests/test.c                 |   6 +
 .../gh-8594-sysprof-ffunc-crash.test.lua      |  55 ----
 3 files changed, 275 insertions(+), 55 deletions(-)
 create mode 100644 test/tarantool-c-tests/gh-8594-sysprof-ffunc-crash.test.c
 delete mode 100644 test/tarantool-tests/gh-8594-sysprof-ffunc-crash.test.lua

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2.39.2