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1、,移动端APM产品研发介绍,技术创新，变革未来,APM概况,Datas,HTTP/HTTPS,TCP/UDP,DNS,页面加载,浏览器渲染,DOM加载,网络数据,其他,协议屋,页面加载,用户基本操作,页面加载生命周期,1/0事件及相关网络操作,交互行为,ANR/卡顿,崩溃,错误,稳定性能,维度,地域,运营商,接入方式,设备,操作系统,应用版本,其他,APM实现,为了减少开发者的工作量，采用了自动埋点技术,实现手段,Bytecode,JavaScript,JS注入,Hook,C/C+,Java-Bytecode,Dalvik-Bytecode,APM实现-Bytecode,一、从Java源代码到
2、Dalvik Bytecode,APM实现-Bytecode,.java - javac,.class-.dex dx,.java -,.class- .dex,JD-GUI,dex2jar,APM实现-Bytecode,Example Java source: Foo.java class Foo public static void main(String args) System.out.println(Hello, world); public int method(int i1, int i2) int i3 = i1 * i2; return i3 * 2; ,APM实现-Byte
3、code,$ javac Foo.java $ javap -v Foo,public int method(int, int); flags: ACC_PUBLIC Code: stack=2, locals=4, args_size=3 0: iload_1 1: iload_2 2: imul 3: istore_3 4: iload_3 5: iconst_2 6: imul 7: ireturn LineNumberTable: line 6: 0 line 7: 4,Stack Before value1 value2 .,After result . （imul指令对栈的操作）,
4、APM实现-Bytecode,$ dx -dex -output=Foo.dex Foo.class $ dexdump -d Foo.dex Virtual methods-,: (in LFoo;) : method : (II)I : 0 x0001 (PUBLIC) -,#0 name type access code registers: 4 ins: 3,outs: 0 insns size: 5 16-bit code units,00018c:,00019c: 9200 0203 0001a0: da00 0002 0001a4: 0f00,|00018c Foo.method
5、:(II)I |0000: mul-int v0, v2, v3 |0002: mul-int/lit8 v0, v0, #int 2 / #02 |0004: return v0,catches: (none),positions: 0 x0000 line=6,0 x0002 line=7,locals,:,0 x0000 - 0 x0005 reg=1 this LFoo;,9200 0203 92: mul-int binopvAA, vBB, vCC 00: v0 (destination register) 02: v2 (first resource register) 03:
6、v3 (second ),APM实现-Bytecode,APM实现-Bytecode,1.获取方法开始时间,2.获取方法完成时间，并计算执行时间,3.上报指标名及性能,4.上报异常,APM实现-Bytecode,Disassemble (baksmali),.smali,Static analysis,Reassemble (smali),Code injection,APM实现-Bytecode,二、native inline hook,APM实现-Hook,Hook,Trampoline,Caller,jmpCallee,Hook function is called,which in turn calls original function,APM实现-Hook,APM实现-Hook,if (instruction ,ARM instruction: LDR PC, PC, #-4 addr Fix instruction which is PC-related;,APM产品,
