JieTrancender / lua-snapshot

Make a snapshot for lua state to detect memory leaks.

lua-snapshot

Make a snapshot for lua state to detect memory leaks.

See dump.lua for example.

Build

make linux

or

make mingw (in windows)

or

make macosx

tutorial

如下示例:

local lss = require "lsnapshot"

local sss = nil
lss.start_snapshot()

local tmp = {}
sss = {}
local function foo()
    return sss
end
local k = {}

lss.dstop_snapshot(40)

在需要做快照的地方调用start_snapshot, 结尾处调用dstop_snapshot([count]), 其中count为要打印的对象个数，不填的话会全部打印。 dstop_snapshot 会列出从start_snapshot开始到结束创建出来的仍然被持有的对象,结果会根据size按照从小到大排序.

执行输出结果:

$ lua dump.lua
----------------- diff snapshot ------------------
[1] (T)    Root->(T)[registry]->(S)[1]->(T)lss{#dump.lua:0}->(L@./lsnapshot.lua:125)dstop_snapshot->(T)begin_s size:2.0546875Kb
[2] (T)    Root->(T)[registry]->(S)[1]->(T)k{#dump.lua:0} size:0.0546875Kb
[3] (T)    Root->(T)[registry]->(S)[1]->(T)tmp{#dump.lua:0} size:0.0546875Kb
[4] (T)    Root->(T)[registry]->(S)[1]->(T)sss{#dump.lua:0} size:0.0546875Kb
[5] ([e-mail]:9)    Root->(T)[registry]->(S)[1]->([e-mail]:9)foo{#dump.lua:0} size:0.0390625Kb
--------------- all size:2.2578125Kb ---------------

其中[X]为索引, 第二个字段包含(T/U/L/C/S).

• (T)表示的为table 类型
• (U)表示userdata 类型
• (L)表示lua function类型
• (C)表示cfunction 类型
• (S)表示thread 类型
• (A)表示string 类型

第三个为fullpath路径. size:1234.5678Kb 表示的为改对象占用的大小