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From: Maxim Kokryashkin via Tarantool-patches <tarantool-patches@dev.tarantool.org>
To: tarantool-patches@dev.tarantool.org, imun@tarantool.org,
	skaplun@tarantool.org, m.shishatskiy@tarantool.org
Subject: [Tarantool-patches] [PATCH luajit] test: adapt test checking global environment
Date: Wed,  6 Oct 2021 16:04:44 +0300	[thread overview]
Message-ID: <20211006130444.3031234-1-m.kokryashkin@tarantool.org> (raw)

LuaJIT doesn't take into account tail calls for
call-level counting, so `getfenv()` behaviour is different
in tail calls. getfenv()` default level is 1 which is invalid for
the test case when is called from tail call (`lj_debug_frame()`
returns NULL).

This commits adds local varibles, so there is no tail call any more.

Part of tarantool/tarantool#5870
---
Issue: https://github.com/tarantool/tarantool/issues/5713
GitHub branch: https://github.com/tarantool/luajit/tree/fckxorg/gh-5713-adapt-test-global-environment-PUC-Rio
CI: https://github.com/tarantool/tarantool/tree/fckxorg/gh-5713-adapt-test-global-environment-PUC-Rio

 test/PUC-Rio-Lua-5.1-tests/closure.lua | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/test/PUC-Rio-Lua-5.1-tests/closure.lua b/test/PUC-Rio-Lua-5.1-tests/closure.lua
index 551fe70d..86f6ad87 100644
--- a/test/PUC-Rio-Lua-5.1-tests/closure.lua
+++ b/test/PUC-Rio-Lua-5.1-tests/closure.lua
@@ -167,22 +167,23 @@ local function foo (a)
   assert(getfenv(0) == a)
   assert(getfenv(1) == _G)
   assert(getfenv(loadstring"") == a)
-  return getfenv()
+
+-- LuaJIT doesn't take into account tail calls for
+-- call-level counting, so `getfenv()` behaviour is different
+-- in tail calls. For example, `pcall()` to this functon returns false
+-- in case of tailcall, because `getfenv()` default level is 1 which
+-- is invalid for this case (`lj_debug_frame()` returns NULL).
+-- See also https://github.com/tarantool/tarantool/issues/5713.
+  local env = getfenv()
+  return env
 end
 
 f = coroutine.wrap(foo)
 local a = {}
 assert(f(a) == _G)
 local a,b = pcall(f)
--- FIXME: LuaJIT doesn't take into account tail calls for
--- call-level counting, so `getfenv()` behaviour is different
--- in tail calls. For example, this `pcall()` returns false,
--- because `getfenv()` default level is 1 which is invalid for
--- this case when is called from tail call (`lj_debug_frame()`
--- returns NULL).
--- See also https://github.com/tarantool/tarantool/issues/5713.
--- Test is disabled for LuaJIT for now.
--- assert(a and b == _G)
+-- Test is adapted to the behavior LuaJIT. See the comment above.
+assert(a and b == _G)
 
 
 -- tests for multiple yield/resume arguments
-- 
2.33.0


             reply	other threads:[~2021-10-06 13:04 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-06 13:04 Maxim Kokryashkin via Tarantool-patches [this message]
2021-12-16 14:34 ` Sergey Kaplun via Tarantool-patches
2022-01-17 23:42   ` Максим Корякшин via Tarantool-patches
2022-01-26 22:33     ` Igor Munkin via Tarantool-patches
2022-02-07  9:32       ` Максим Корякшин via Tarantool-patches
2022-01-17 23:43   ` Максим Корякшин via Tarantool-patches
2022-02-17 16:34 ` Igor Munkin via Tarantool-patches
  -- strict thread matches above, loose matches on Subject: below --
2021-09-24 18:20 Maxim Kokryashkin via Tarantool-patches
2021-10-05 17:37 ` Sergey Kaplun via Tarantool-patches

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