[Tarantool-patches] [PATCH luajit v3 08/29] test: adapt PUC-Rio tests counting GC steps

[Sergey Kaplun]

JIT compilation can unpredictably allocate or reference objects (or
traces itself). So, the amount of GC steps can vary from run to run.

This patch disables JIT machinery, if it is enabled, for stable GC
results.

Part of tarantool/tarantool#5845
Part of tarantool/tarantool#4473
---
 test/PUC-Rio-Lua-5.1-tests/gc.lua | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/test/PUC-Rio-Lua-5.1-tests/gc.lua b/test/PUC-Rio-Lua-5.1-tests/gc.lua
index 86a9f758..b6925b69 100644
--- a/test/PUC-Rio-Lua-5.1-tests/gc.lua
+++ b/test/PUC-Rio-Lua-5.1-tests/gc.lua
@@ -108,11 +108,21 @@ local function dosteps (siz)
   return i
 end
 
+-- LuaJIT: JIT compilation can unpredictably allocate or reference
+-- objects (or traces itself). Disable it if necessary for
+-- this chunk for stable GC results.
+local jit_is_enabled = jit.status()
+if jit_is_enabled then
+  jit.off()
+end
 assert(dosteps(0) > 10)
 assert(dosteps(6) < dosteps(2))
 assert(dosteps(10000) == 1)
 assert(collectgarbage("step", 1000000) == true)
 assert(collectgarbage("step", 1000000))
+if jit_is_enabled then
+  jit.on()
+end
 
 
 do
-- 
2.31.0