UI压力测试工具需要比用户还了解用户的操作，能够捕捉到边缘操作问题(甚至用户都想不到的操作，比如在没有输入框的界面下狂点输入法。)
如何解决压力测试发现的问题
1.工具
CE里面我们有CeStress以及Hopper工具，Android里我们有Monkey
Windows下我们的分析工具有：Windbg、Platform Builder以及CeDebugX等插件
Windows CE>!help
CEDEBUGX
File Version : 6.00.0000
Product Version : 6.00.0000
COMMANDS:
To see detailed help type the command followed by /?
Extension Information and Control:
help - display this list
version - display version information for this extension
refresh - refresh cached info (must call after any run/break cycle).
xml - capture debug info in an xml file and display formatted data.
save - prompts the user for a location in which to save all files generated in the session.
getworkingpath - display the path to the debugger extension's current working folder.
setworkingpath - specify a path to use as a new destination for saved files (working folder)
General Information:
exception - exception info and current call stack
kinfo - prints the UserKInfo table
toc - prints ROM table of contents
oat - prints OEM Address Table
disasm - retrieve disassembly for a given address
getsym - list nearest symbol at addr
checksymbols - validate that correct symbols are in use.
dd - dump data at given address
ll - prints linked lists generically
expr - evaluate an expression
getsizeof - get the size, in bytes, of a type or expression
d2x - convert a decimal integer to a hex value.
x2i - convert a hex value to a singed integer.
x2u - convert a hex value to an unsigned integer.
ms2t - display a value in milliseconds as hours, minutes, and seconds.
Diagnostics:
diagnose - provide detailed information about hangs or crashes
Threads:
thread - prints thread information from thread ptr
threadh - prints thread information from thread handle
threadlist - enumerate all threads (basic info). use "threadlist ?" for more options
allthreads - enumerate all threads (extended info)
runlist - enumerate threads on the scheduler's run list.
sleeplist - enumerate threads on the scheduler's sleep list.
context - print context information for a given thread.
stackeval - prints all values on a thread's stack, looking for potential symbols and known objects
stacktrace - prints stack ptr and frame ptrs with PC and ret addr for a given thread
Processes and Modules:
proc - prints process information
proclist - lists all processes
module - prints module information
modlist - lists all loaded modules
Handles:
handlelist - prints active handle list
handle - evaluates a handle to determine type
h2p - get kernel object ptr from a handle
p2h - get a handle from a kernel object ptr
Blocked Threads:
proxy - prints detailed information about a particular proxy (i.e. blocking object)
proxylist - lists all of the proxies in the system or owned by a particualr process
blocked - prints list of blocking objects (proxies) and the threads they are blocking
cslist - prints a list of critical sections that are currently blocking threads
eventlist - prints a list of events that are currently blocking threads
sending - prints a list of threads blocked in SendMessage calls
Heaps:
alloclist - prints allocations in a process grouped by allocating function or thread.
heaplist - prints summary information about all heaps in the system
heap - prints detailed information about a particular heap.
region - prints detailed information about a particular heap region.
heapwalk - print a list of all items in one or more heaps
regionwalk - print a list of all items in one or more regions
heapvalist - print list of heap items greater than 16Kb in size
dumpitem - prints contents of a heap item
finditem - finds and prints info about a heap item at a given address
listitems - list all heap items meeting given criteria (e.g. size, allocator, data, etc.)
Memory:
meminfo - prints system memory information
valist - prints virtual allocations associated with a process
fsmaplist - prints summary information about all memory-mapped files
fsmap - prints information about a memory-mapped file
fsviewlist - prints summary information about all memory-mapped views
fsview - prints information about a memory-mapped view
pgpool - prints information about the page pools
GWES:
win - enumerate all windows (use it without arguments for more options)
winh - prints the window information for a handle (can use p|c|n|d|a) for navigation
gditable - enumerate all GDI entries
gdih - prints the information of the GDI entity related to the provided handle
gdiobj - prints the information of the GDI entity related to the provided gdi object
screenshot - creates and shows a screenshot of the current UI state of the device
msgqueues - lists active message queues
Internal:
match - find a duplicate bug (must first 'diagnose')
2.Repro or Not Repro
第一个问题要了解问题能不能复现(Repro)，这里说Not Repro的意思是问题几乎不能复现(因为Repro的环境非常苛刻，或者概率很低)
3.需要哪些知识和能力
喜欢福尔摩斯吗？
罪犯在有“压力”的情况下犯的案，比较难分析。经常遇到“太阳怎么从西边出来了”这样的问题。
较强的问题分析能力
能够通过一些信息片段还原整个流程
汇编(了解)、操作系统、C/C++
4.常用的方法：
a.小组对照实验
b.Automation得到大量数据
c.正向思维和逆向思维
d.先发散思维，从广度得到数据，然后从深度分析，直到找到Root Cause
5.从哪里得到数据？
a.Log信息(RETAILMSG/NKPrint…) Output窗口/Log file
b.Visual Studio中的Watch窗口/Memory窗口…
c.汇编窗口
d.靠眼睛看现象/靠听/靠闻？望闻问切？
6.什么样的Bug最难解？
Not Repro的问题
如何解决小概率问题
