blob: ae1d6d0833c4ce0f6055c7af989fa73a5398d497 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
local t = require('test.unit.testutil')
local itp = t.gen_itp(it)
local ffi = t.ffi
local cimport = t.cimport
local to_cstr = t.to_cstr
local eq = t.eq
-- Import terminfo headers
local terminfo = cimport('./src/nvim/tui/terminfo.h')
describe('terminfo_fmt', function()
itp('stack overflow fails before producing output', function()
-- Creates a buffer
local buf = ffi.new('char[256]')
local buf_end = buf + ffi.sizeof(buf) -- One past end
-- Sets input parameters
local params = ffi.new('TPVAR[9]')
params[0].num = 65 -- 'A'
params[0].string = nil
-- 20 pushes (TPSTACK nums array limit) then prints one char
local valid_fmt = string.rep('%p1', 20) .. '%c'
local valid_n = terminfo.terminfo_fmt(buf, buf_end, to_cstr(valid_fmt), params)
eq(1, valid_n)
-- Overflows with 21 pushes and fails before print
local overflow_fmt = string.rep('%p1', 21) .. '%c'
local overflow_n = terminfo.terminfo_fmt(buf, buf_end, to_cstr(overflow_fmt), params)
eq(0, overflow_n)
end)
end)
|
