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501a21f333
Problem: stack->offset value is used as an array index. Solution: Instead of comparing the stack->offset value to the size in bytes of the array, compare the actual length of the array.
34 lines
1.0 KiB
Lua
34 lines
1.0 KiB
Lua
local t = require('test.unit.testutil')
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local itp = t.gen_itp(it)
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local ffi = t.ffi
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local cimport = t.cimport
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local to_cstr = t.to_cstr
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local eq = t.eq
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-- Import terminfo headers
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local terminfo = cimport('./src/nvim/tui/terminfo.h')
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describe('terminfo_fmt', function()
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itp('stack overflow fails before producing output', function()
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-- Creates a buffer
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local buf = ffi.new('char[256]')
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local buf_end = buf + ffi.sizeof(buf) -- One past end
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-- Sets input parameters
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local params = ffi.new('TPVAR[9]')
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params[0].num = 65 -- 'A'
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params[0].string = nil
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-- 20 pushes (TPSTACK nums array limit) then prints one char
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local valid_fmt = string.rep('%p1', 20) .. '%c'
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local valid_n = terminfo.terminfo_fmt(buf, buf_end, to_cstr(valid_fmt), params)
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eq(1, valid_n)
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-- Overflows with 21 pushes and fails before print
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local overflow_fmt = string.rep('%p1', 21) .. '%c'
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local overflow_n = terminfo.terminfo_fmt(buf, buf_end, to_cstr(overflow_fmt), params)
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eq(0, overflow_n)
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end)
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end)
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