Hi! Thanks for the review.
 
> 
>>Hello, Max!
>>
>>Thanks for the patch! See my comments.
>>
>>
>>Sergey
>>
>>On 7/10/23 14:24, Maksim Kokryashkin wrote:
>>> From: Maxim Kokryashkin < m.kokryashkin@tarantool.org >
>>>
>>> It is really inconvenient to use a standalone shell script to parse
>>> memprof dump. That is why this commit introduces a CLI flag for tools
>>> to the LuaJIT, so now it is possible to parse memprof dump
>>> as simple as:
>>> ```
>>> luajit -tm memprof.bin
>>> ```
>>>
>>> Closes tarantool/tarantool#5688
>>> ---
>>> Changes in v7:
>>> - Fixed comments as per review by Sergey
>>>
>>> Branch:  https://github.com/tarantool/luajit/tree/fckxorg/gh-5688-cli-for-memprof-parse
>>> PR:  https://github.com/tarantool/tarantool/pull/8002
>>>
>>> src/luajit.c | 32 +++++++++-
>>> .../gh-5688-memprof-cli-flag.test.lua | 58 +++++++++++++++++++
>>> 2 files changed, 89 insertions(+), 1 deletion(-)
>>> create mode 100644 test/tarantool-tests/gh-5688-memprof-cli-flag.test.lua
>>>
>>> diff --git a/src/luajit.c b/src/luajit.c
>>> index 1ca24301..d335f32b 100644
>>> --- a/src/luajit.c
>>> +++ b/src/luajit.c
>>> @@ -72,6 +72,7 @@ static void print_usage(void)
>>> " -O[opt] Control LuaJIT optimizations.\n"
>>> " -i Enter interactive mode after executing " LUA_QL("script") ".\n"
>>> " -v Show version information.\n"
>>> + " -t[cmd] Execute tool.\n"
>>
>>According to usage cmd after -t option is optional. However without cmd
>>luajit prints usage
>>
>>that hints about incorrect usage:
>>
>>
>>[0] ~/sources/MRG/tarantool/third_party/luajit$ ./src/luajit -t
>>usage: ./src/luajit [options]... [script [args]...].
>>Available options are:
>>   -e chunk  Execute string 'chunk'.
>>   -l name   Require library 'name'.
>>   -b ...    Save or list bytecode.
>>   -j cmd    Perform LuaJIT control command.
>>   -O[opt]   Control LuaJIT optimizations.
>>   -i        Enter interactive mode after executing 'script'.
>>   -v        Show version information.
>>   -t[cmd]   Execute tool.
>>   -E        Ignore environment variables.
>>   --        Stop handling options.
>>   -         Execute stdin and stop handling options.
>Fixed! Branch is force-pushed, here is the diff:
>=========================================================
>diff --git a/src/luajit.c b/src/luajit.c
>index d335f32b..c16138f0 100644
>--- a/src/luajit.c
>+++ b/src/luajit.c
>@@ -72,7 +72,7 @@ static void print_usage(void)
>   "  -O[opt]   Control LuaJIT optimizations.\n"
>   "  -i        Enter interactive mode after executing " LUA_QL("script") ".\n"
>   "  -v        Show version information.\n"
>-  "  -t[cmd]   Execute tool.\n"
>+  "  -t(cmd)   Execute tool.\n"
>   "  -E        Ignore environment variables.\n"
>   "  --        Stop handling options.\n"
>   "  -         Execute stdin and stop handling options.\n", stderr);
>=========================================================
>>
>><snipped>
>>> +end
>>> +
>>> +generate_output(TMP_BINFILE, default_payload)
>>> +
>>> +local errcode = os.execute(EXECUTABLE .. ' -tinvalid ' .. TMP_BINFILE)
>>> +test:ok(errcode ~= 0, 'invalid tool flag')
>>> +
>>> +errcode = os.execute(EXECUTABLE .. ' -tm ' .. BAD_PATH)
>>> +test:ok(errcode ~= 0, 'binfile does not exist')
>>> +
>>> +errcode = os.execute(EXECUTABLE .. ' -tm ' .. TMP_BINFILE)
>>> +test:ok(errcode == 0, 'memprof binfile parsing')
>>Nit: probably it is worth adding  checks for output.
>>> +
>>> +os.remove(TMP_BINFILE)
>>> +os.exit(test:check() and 0 or 1)
>>> --
>>> 2.39.2 (Apple Git-143)
>>>
>--
>Best regards,
>Maxim Kokryashkin
>