[tarantool-patches] [PATCH 1/1] test: add tests from tarantool source tree
Igor Munkin
imun at tarantool.org
Thu Sep 5 17:20:07 MSK 2019
Introduced structure has the following benefits:
* Excess testing machinery currently is not required directly in
luajit repo considering whole CI process setup for tarantool and its
static linking with libluajit
* All new tests related to luajit fixes and enhancements can be added
within a single patch with the corresponding changeset
NB!: All added test chunks use tarantool tap module
---
test/fold_bug_LuaJIT_505.test.lua | 21 +++
test/gh.test.lua | 17 +++
test/suite.ini | 5 +
test/table_chain_bug_LuaJIT_494.test.lua | 178 +++++++++++++++++++++++
test/unsink_64_kptr.test.lua | 44 ++++++
5 files changed, 265 insertions(+)
create mode 100755 test/fold_bug_LuaJIT_505.test.lua
create mode 100755 test/gh.test.lua
create mode 100644 test/suite.ini
create mode 100755 test/table_chain_bug_LuaJIT_494.test.lua
create mode 100755 test/unsink_64_kptr.test.lua
diff --git a/test/fold_bug_LuaJIT_505.test.lua b/test/fold_bug_LuaJIT_505.test.lua
new file mode 100755
index 0000000..71e2cba
--- /dev/null
+++ b/test/fold_bug_LuaJIT_505.test.lua
@@ -0,0 +1,21 @@
+#!/usr/bin/env tarantool
+
+tap = require('tap')
+
+test = tap.test("505")
+test:plan(1)
+
+-- Test file to demonstrate Lua fold machinery icorrect behavior, details:
+-- https://github.com/LuaJIT/LuaJIT/issues/505
+
+jit.opt.start(0, "hotloop=1")
+require('jit.dump').start("+bti", "505.trace")
+for _ = 1, 20 do
+ local value = "abc"
+ local pos_c = string.find(value, "c", 1, true)
+ local value2 = string.sub(value, 1, pos_c - 1)
+ local pos_b = string.find(value2, "b", 2, true)
+ assert(pos_b == 2, "FAIL: position of 'b' is " .. pos_b)
+end
+
+test:ok("PASS")
diff --git a/test/gh.test.lua b/test/gh.test.lua
new file mode 100755
index 0000000..00b71a6
--- /dev/null
+++ b/test/gh.test.lua
@@ -0,0 +1,17 @@
+#!/usr/bin/env tarantool
+
+-- Miscellaneous test for LuaJIT bugs
+tap = require('tap')
+
+test = tap.test("gh")
+test:plan(2)
+--
+-- gh-3196: incorrect string length if Lua hash returns 0
+--
+h = "\x1F\x93\xE2\x1C\xCA\xDE\x28\x08\x26\x01\xED\x0A\x2F\xE4\x21\x02\x97\x77\xD9\x3E"
+test:is(h:len(), 20)
+
+h = "\x0F\x93\xE2\x1C\xCA\xDE\x28\x08\x26\x01\xED\x0A\x2F\xE4\x21\x02\x97\x77\xD9\x3E"
+test:is(h:len(), 20)
+
+test:check()
diff --git a/test/suite.ini b/test/suite.ini
new file mode 100644
index 0000000..3e860c9
--- /dev/null
+++ b/test/suite.ini
@@ -0,0 +1,5 @@
+[default]
+core = app
+description = Luajit tests
+is_parallel = True
+pretest_clean = True
diff --git a/test/table_chain_bug_LuaJIT_494.test.lua b/test/table_chain_bug_LuaJIT_494.test.lua
new file mode 100755
index 0000000..06c0f0d
--- /dev/null
+++ b/test/table_chain_bug_LuaJIT_494.test.lua
@@ -0,0 +1,178 @@
+#!/usr/bin/env tarantool
+
+tap = require('tap')
+
+test = tap.test("494")
+test:plan(1)
+
+-- Test file to demonstrate Lua table hash chain bugs discussed in
+-- https://github.com/LuaJIT/LuaJIT/issues/494
+-- Credit: prepared by Peter Cawley here with minor edits:
+-- https://gist.github.com/corsix/1fc9b13a2dd5f3659417b62dd54d4500
+
+--- Plumbing
+ffi = require"ffi"
+ffi.cdef"char* strstr(const char*, const char*)"
+strstr = ffi.C.strstr
+cast = ffi.cast
+str_hash_offset = cast("uint32_t*", strstr("*", ""))[-2] == 1 and 3 or 2
+function str_hash(s)
+ return cast("uint32_t*", strstr(s, "")) - str_hash_offset
+end
+table_new = require"table.new"
+
+--- Prepare some objects
+victims = {}
+orig_hash = {}
+for c in ("abcdef"):gmatch"." do
+ v = c .. "{09add58a-13a4-44e0-a52c-d44d0f9b2b95}"
+ victims[c] = v
+ orig_hash[c] = str_hash(v)[0]
+end
+collectgarbage()
+
+do --- Basic version of the problem
+ for k, v in pairs(victims) do
+ str_hash(v)[0] = 0
+ end
+ t = table_new(0, 8)
+ -- Make chain a -> b -> c -> d, all with a as primary
+ t[victims.a] = true
+ t[victims.d] = true
+ t[victims.c] = true
+ t[victims.b] = true
+ -- Change c's primary to b, and d's primary to c
+ t[victims.d] = nil
+ t[victims.c] = nil
+ str_hash(victims.c)[0] = 5
+ str_hash(victims.d)[0] = 6
+ t[victims.c] = true
+ t[victims.d] = true
+ -- Insert something with b as primary
+ str_hash(victims.e)[0] = 5
+ t[victims.e] = true
+ -- Check for consistency
+ for c in ("abcde"):gmatch"." do
+ assert(t[victims[c]], c)
+ end
+end
+collectgarbage()
+
+do --- Just `mn != freenode` can lead to infinite loops
+ for k, v in pairs(victims) do
+ str_hash(v)[0] = 0
+ end
+ t = table_new(0, 8)
+ -- Make chain a -> b -> c -> d, all with a as primary
+ t[victims.a] = true
+ t[victims.d] = true
+ t[victims.c] = true
+ t[victims.b] = true
+ -- Change c's primary to b, and d's primary to d
+ t[victims.d] = nil
+ t[victims.c] = nil
+ str_hash(victims.c)[0] = 5
+ str_hash(victims.d)[0] = 7
+ t[victims.c] = true
+ t[victims.d] = true
+ -- Insert something with b as primary
+ str_hash(victims.e)[0] = 5
+ t[victims.e] = true
+ -- Insert something with d as primary (infinite lookup loop)
+ str_hash(victims.f)[0] = 7
+ t[victims.f] = true
+end
+collectgarbage()
+
+do --- Just `mn != nn` can lead to infinite loops
+ for k, v in pairs(victims) do
+ str_hash(v)[0] = 0
+ end
+ t = table_new(0, 8)
+ -- Make chain a -> b -> c -> d -> e, all with a as primary
+ t[victims.a] = true
+ t[victims.e] = true
+ t[victims.d] = true
+ t[victims.c] = true
+ t[victims.b] = true
+ -- Change c's primary to b, d's primary to d, and e's primary to d
+ t[victims.e] = nil
+ t[victims.d] = nil
+ t[victims.c] = nil
+ str_hash(victims.c)[0] = 4
+ str_hash(victims.d)[0] = 6
+ str_hash(victims.e)[0] = 6
+ t[victims.c] = true
+ t[victims.d] = true
+ t[victims.e] = true
+ -- Insert something with b as primary (infinite rechaining loop)
+ str_hash(victims.f)[0] = 4
+ t[victims.f] = true
+end
+
+for i = 0, 10 do --- Non-strings can need rechaining too
+ collectgarbage()
+
+ k = tonumber((("0x%xp-1074"):format(i)))
+ str_hash(victims.a)[0] = 0
+ str_hash(victims.b)[0] = 0
+ t = table_new(0, 4)
+ -- a -> b, both with a as primary
+ t[victims.a] = true
+ t[victims.b] = true
+ -- Change b's primary to b
+ t[victims.b] = nil
+ str_hash(victims.b)[0] = 3
+ t[victims.b] = true
+ -- Might get a -> b -> k, with k's primary as b
+ t[k] = true
+ -- Change b's primary to a
+ t[victims.b] = nil
+ str_hash(victims.b)[0] = 0
+ t[victims.b] = true
+ -- Insert something with b as primary
+ str_hash(victims.c)[0] = 3
+ t[victims.c] = true
+ -- Check for consistency
+ assert(t[k], i)
+end
+
+for i = 0, 10 do --- Non-strings can be moved to freenode
+ collectgarbage()
+
+ k = false
+ str_hash(victims.a)[0] = 0
+ str_hash(victims.b)[0] = 0
+ t = table_new(0, 4)
+ -- a -> k -> b, all with a as primary
+ t[victims.a] = true
+ t[victims.b] = true
+ t[k] = true
+ -- Change b's primary to k
+ t[victims.b] = nil
+ str_hash(victims.b)[0] = 2
+ t[victims.b] = true
+ -- Insert a non-string with primary of k
+ t[tonumber((("0x%xp-1074"):format(i)))] = true
+ -- Check for consistency
+ assert(t[victims.b], i)
+end
+collectgarbage()
+
+do --- Do not forget to advance freenode in the not-string case
+ t = table_new(0, 4)
+ -- Chain of colliding numbers
+ t[0x0p-1074] = true
+ t[0x4p-1074] = true
+ t[0x8p-1074] = true
+ -- Steal middle node of the chain to be a main node (infinite walking loop)
+ t[0x2p-1074] = true
+end
+collectgarbage()
+
+--- Restore interpreter invariants, just in case
+for c, v in pairs(victims) do
+ str_hash(v)[0] = orig_hash[c]
+end
+
+test:ok("PASS")
diff --git a/test/unsink_64_kptr.test.lua b/test/unsink_64_kptr.test.lua
new file mode 100755
index 0000000..8995763
--- /dev/null
+++ b/test/unsink_64_kptr.test.lua
@@ -0,0 +1,44 @@
+#!/usr/bin/env tarantool
+
+tap = require('tap')
+
+test = tap.test("232")
+test:plan(1)
+
+--- From: Thibault Charbonnier <thibaultcha at me.com>
+--- tests: ffi: added a test case unsinking a 64-bit pointer from a constant.
+---
+--- This test case reproduces the issue observed at:
+--- https://github.com/openresty/lua-resty-core/issues/232 and was
+--- contributed by @lukego and myself.
+---
+--- Co-authored-by: Luke Gorrie <lukego at gmail.com>
+---
+local ffi = require("ffi")
+
+local array = ffi.new("struct { int x; } [1]")
+
+-- This test forces the VM to unsink a pointer that was constructed
+-- from a constant. The IR will include a 'cnewi' instruction to
+-- allocate an FFI pointer object, the pointer value will be an IR
+-- constant, the allocation will be sunk, and the allocation will
+-- at some point be "unsunk" due to a reference in the snapshot for
+-- a taken exit.
+
+-- Note: JIT will recognize <array> as a "singleton" and allow its
+-- address to be inlined ("constified") instead of looking up the
+-- upvalue at runtime.
+
+local function fn(i)
+ local struct = array[0] -- Load pointer that the JIT will constify.
+ if i == 1000 then end -- Force trace exit when i==1000.
+ struct.x = 0 -- Ensure that 'struct' is live after exit.
+end
+
+-- Loop over the function to make it compile and take a trace exit
+-- during the final iteration.
+for i = 1, 1000 do
+ fn(i)
+end
+
+test:ok("PASS")
--
2.22.1
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