From d36a31e6739bcd39c84f637344227af87cfd0ee5 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Thu, 18 Jul 2019 14:58:15 -0300
Subject: Reviving HARDMEMTESTS

This commit brings a new implementation for HARDMEMTESTS, which forces
an emergency GC whenever possible. It also fixes some issues detected
with this option:
  - A small bug in lvm.c: a closure could be collected by an emergency
  GC while being initialized.
  - Some tests: a memory address can be immediatly reused after a GC;
  for instance, two consecutive '{}' expressions can return exactly the
  same address, if the first one is not anchored.
---
 testes/api.lua     |  7 +++++--
 testes/strings.lua | 11 ++++++++---
 2 files changed, 13 insertions(+), 5 deletions(-)

(limited to 'testes')

diff --git a/testes/api.lua b/testes/api.lua
index 8f4e89ac..5da03641 100644
--- a/testes/api.lua
+++ b/testes/api.lua
@@ -354,8 +354,11 @@ assert(to("topointer", nil) == null)
 assert(to("topointer", "abc") ~= null)
 assert(to("topointer", string.rep("x", 10)) ==
        to("topointer", string.rep("x", 10)))    -- short strings
-assert(to("topointer", string.rep("x", 300)) ~=
-       to("topointer", string.rep("x", 300)))    -- long strings
+do    -- long strings
+  local s1 = string.rep("x", 300)
+  local s2 = string.rep("x", 300)
+  assert(to("topointer", s1) ~= to("topointer", s2))
+end
 assert(to("topointer", T.pushuserdata(20)) ~= null)
 assert(to("topointer", io.read) ~= null)           -- light C function
 assert(to("topointer", hfunc) ~= null)        -- "heavy" C function
diff --git a/testes/strings.lua b/testes/strings.lua
index 1b2b570e..2540fdef 100644
--- a/testes/strings.lua
+++ b/testes/strings.lua
@@ -163,11 +163,16 @@ do  -- tests for '%p' format
   assert(string.format("%p", 4) == null)
   assert(string.format("%p", print) ~= null)
   assert(string.format("%p", coroutine.running()) ~= null)
-  assert(string.format("%p", {}) ~= string.format("%p", {}))
+  do
+    local t1 = {}; local t2 = {}
+    assert(string.format("%p", t1) ~= string.format("%p", t2))
+  end
   assert(string.format("%p", string.rep("a", 10)) ==
          string.format("%p", string.rep("a", 10)))     -- short strings
-  assert(string.format("%p", string.rep("a", 300)) ~=
-         string.format("%p", string.rep("a", 300)))     -- long strings
+  do     -- long strings
+    local s1 = string.rep("a", 300); local s2 = string.rep("a", 300)
+    assert(string.format("%p", s1) ~= string.format("%p", s2))
+  end
   assert(#string.format("%90p", {}) == 90)
 end
 
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