XCode Linkmap Parser

linkmap.js

var readline = require('readline'),
    fs = require('fs');

var LinkMap = function(filePath) {
	this.files = []
	this.filePath = filePath
}

LinkMap.prototype = {
	start: function(cb) {
		var self = this
		var rl = readline.createInterface({
		    input: fs.createReadStream(self.filePath),
		    output: process.stdout,
		    terminal: false
		});
		var currParser = "";
		rl.on('line', function(line) {
			if (line[0] == '#') {
				if (line.indexOf('Object files') > -1) {
					currParser = "_parseFiles";
				} else if (line.indexOf('Sections') > -1) {
					currParser = "_parseSection";
				} else if (line.indexOf('Symbols') > -1) {
					currParser = "_parseSymbols";
				}
				return;
			}
			if (self[currParser]) {
				self[currParser](line)
			}
		});

		rl.on('close', function(line) {
			cb(self)
		});
	},

	_parseFiles: function(line) {
		var arr =line.split(']')
		if (arr.length > 1) {
			var idx = Number(arr[0].replace('[',''));
			var file = arr[1].split('/').pop().trim()
			this.files[idx] = {
				name: file,
				size: 0
			}
		}
	},

	_parseSection: function(line) {
	},

	_parseSymbols: function(line) {
		var arr = line.split('\t')
		if (arr.length > 2) {
			var size = parseInt(arr[1], 16)
			var idx = Number(arr[2].split(']')[0].replace('[', ''))
			if (idx && this.files[idx]) {
				this.files[idx].size += size;
			}
		}
	},

	_formatSize: function(size) {
		if (size > 1024 * 1024) return (size/(1024*1024)).toFixed(2) + "MB"
		if (size > 1024) return (size/1024).toFixed(2) + "KB"
		return size + "B"
	},

	statLibs: function(h) {
		var libs = {}
		var files = this.files;
		var self = this;
		for (var i in files) {
			var file = files[i]
			var libName
			if (file.name.indexOf('.o)') > -1) {
				libName = file.name.split('(')[0]
			} else {
				libName = file.name
			}
			if (!libs[libName]) {
				libs[libName] = 0
			}
			libs[libName] += file.size
		}
		var i = 0, sortLibs = []
		for (var name in libs) {
			sortLibs[i++] = {
				name: name,
				size: libs[name]
			}
		}
		sortLibs.sort(function(a,b) {
			return a.size > b.size ? -1: 1
		})
		if (h) {
			sortLibs.map(function(o) {
				o.size = self._formatSize(o.size)
			})
		}
		return sortLibs
	},

	statFiles: function(h) {
		var self = this
		self.files.sort(function(a,b) {
			return a.size > b.size ? -1: 1
		})
		if (h) {
			self.files.map(function(o) {
				o.size = self._formatSize(o.size)
			})
		}
		return this.files
	}
}

if (!process.argv[2]) {
	console.log('usage: node linkmap.js filepath -hl')
	console.log('-h: format size')
	console.log('-l: stat libs')
	return
}
var isStatLib, isFomatSize
var opts = process.argv[3];
if (opts && opts[0] == '-') {
	if (opts.indexOf('h') > -1) isFomatSize = true
	if (opts.indexOf('l') > -1) isStatLib = true
}

var linkmap = new LinkMap(process.argv[2])
linkmap.start(function(){
	var ret = isStatLib ? linkmap.statLibs(isFomatSize) 
	                    : linkmap.statFiles(isFomatSize)
	for (var i in ret) {
		console.log(ret[i].name + '\t' + ret[i].size)
	}
})

请问一下 filePath 指的是什么?

filePath refers to the path of the link map file.
http://blog.cnbang.net/tech/2296/

怎么去使用它

usage: node linkmap.js filepath -hl
-h: format size
-l: stat libs

如果有armv7和arm64统计的时候是不是就得在统计库大小的时候吧两个的统计都加起来呢，还有那个-l比只加-h大了点，这个是多统计了啥呢