mirror of https://github.com/rusefi/lua.git
83 lines
1.9 KiB
Lua
83 lines
1.9 KiB
Lua
-- $Id: testes/cstack.lua $
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-- See Copyright Notice in file all.lua
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print"testing C-stack overflow detection"
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-- Segmentation faults in these tests probably result from a C-stack
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-- overflow. To avoid these errors, recompile Lua with a smaller
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-- value for the constant 'LUAI_MAXCCALLS' or else ensure a larger
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-- stack for the program.
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local function checkerror (msg, f, ...)
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local s, err = pcall(f, ...)
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assert(not s and string.find(err, msg))
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end
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local count
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local back = string.rep("\b", 8)
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local function progress ()
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count = count + 1
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local n = string.format("%-8d", count)
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io.stderr:write(back, n)
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end
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do print("testing simple recursion:")
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count = 0
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local function foo ()
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progress()
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foo()
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end
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checkerror("stack overflow", foo)
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print("\tfinal count: ", count)
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end
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do print("testing stack overflow in message handling")
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count = 0
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local function loop (x, y, z)
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progress()
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return 1 + loop(x, y, z)
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end
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local res, msg = xpcall(loop, loop)
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assert(msg == "error in error handling")
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print("\tfinal count: ", count)
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end
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-- bug since 2.5 (C-stack overflow in recursion inside pattern matching)
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do print("testing recursion inside pattern matching")
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local function f (size)
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local s = string.rep("a", size)
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local p = string.rep(".?", size)
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return string.match(s, p)
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end
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local m = f(80)
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assert(#m == 80)
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checkerror("too complex", f, 200000)
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end
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do print("testing stack-overflow in recursive 'gsub'")
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count = 0
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local function foo ()
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progress()
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string.gsub("a", ".", foo)
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end
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checkerror("stack overflow", foo)
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print("\tfinal count: ", count)
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print("testing stack-overflow in recursive 'gsub' with metatables")
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count = 0
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local t = setmetatable({}, {__index = foo})
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foo = function ()
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count = count + 1
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progress(count)
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string.gsub("a", ".", t)
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end
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checkerror("stack overflow", foo)
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print("\tfinal count: ", count)
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end
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print'OK'
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