剧集
碎片整理工具 #170 - 调试器 - JavaScript 脚本
在这集碎片整理工具中,安德鲁·理查兹从 Windows 调试工具团队与 Andy Luhrs 和 Bill Messmer 交谈。 我们将介绍 WDK 和 SDK 内部版本 14951 及更新版本中提供的 WinDbg 中的新的 JavaScript 扩展性和脚本功能。
- 博客- https://blogs.msdn.microsoft.com/windbg/
- 电子邮件- windbgfb@microsoft.com
Bill 利用了以前在这些情节中的调试器对象模型:
时间线:
[00:00] 欢迎和简介
[00:24] 新 SDK 删除
[00:29] 为什么 JavaScript
[02:07] 新建命令
[03:50] Visual Studio Code
[04:00] 示例 - Hello World
[07:15] 调试器默认命名空间
[09:07] 示例 - 打印所有线程
[10:26] 示例 - 条件断点
[18:13] 'g' vs. 'gc' - 安德鲁是对的! “gc”以与启动相同的方式恢复执行。 因此,如果命中“p”,然后命中包含“gc”的条件断点,则“gc”将完成初始“p”。
[20:40] 示例 - 唯一堆栈
[34:40] 示例 - 加法
问题/评论? 请发送电子邮件到 defragtools@microsoft.com 与我们联系
JavaScript MSDN 文档:
唯一堆栈示例(右图):
“使用严格”;
class __stackEntry { constructor(frameString) { this.threads = []; this.frameString = frameString; this.children = new Map(; }
display(indent)
{
for (var child of this.children.values())
{
host.diagnostics.debugLog(indent, child.frameString, " [Threads In Branch: ");
for (var thread of child.threads)
{
host.diagnostics.debugLog(thread.Id, " ");
}
host.diagnostics.debugLog("]\n");
child.display(indent + " ");
}
}
}
class __stackMap { constructor(process) { this.__process = process; this.__root = new __stackEntry(“”);this.build();}
build()
{
for (var thread of this.__process.Threads)
{
var current = this.__root;
var frameNum = 0;
var frameCount = thread.Stack.Frames.Count();
for (var frameNum = frameCount - 1; frameNum >= 0; --frameNum) {
var frame = thread.Stack.Frames[frameNum];
var frameString = frame.toString();
if (current.children.has(frameString)) {
current = current.children.get(frameString);
current.threads.push(thread);
}
else {
var newEntry = new __stackEntry(frameString);
current.children.set(frameString, newEntry);
current = newEntry;
current.threads.push(thread);
}
}
}
}
findEntry(thread)
{
var current = this.__root;
var frameCount = thread.Stack.Frames.Count();
for (var frameNum = frameCount - 1; frameNum >= 0; --frameNum)
{
var frame = thread.Stack.Frames[frameNum];
var frameString = frame.toString();
if (!current.children.has(frameString))
{
return null;
}
current = current.children.get(frameString);
}
return current;
}
display()
{
this.__root.display("");
}
}
class __threadSameStacks { constructor(thread) { this.__thread = thread; }
getDimensionality()
{
return 1;
}
getValueAt(idx)
{
for (var idxVal of this)
{
var tid = idxVal[Symbol.indicies][0];
if (idxVal[Symbol.indicies][0] == idx && tid != this.__thread.Id)
{
return idxVal.value;
}
}
return undefined;
}
*[Symbol.iterator]()
{
var context = this.__thread.hostContext;
var session = host.namespace.Debugger.Sessions.getValueAt(context);
var process = session.Processes.getValueAt(context);
var map = new __stackMap(process);
var entry = map.findEntry(this.__thread);
if (entry != null)
{
for (var sharingThread of entry.threads)
{
if (sharingThread.Id != this.__thread.Id)
{
yield new host.indexedValue(sharingThread, [sharingThread.Id]);
}
}
}
}
}
class __threadExtension { get IdenticalStacks() { return new __threadSameStacks(this); } } }
function invokeScript() { var map = new __stackMap(host.currentProcess); map.display(); }
function initializeScript() { return [new host.namedModelParent(__threadExtension, “Debugger.Models.Thread”)]; }
在这集碎片整理工具中,安德鲁·理查兹从 Windows 调试工具团队与 Andy Luhrs 和 Bill Messmer 交谈。 我们将介绍 WDK 和 SDK 内部版本 14951 及更新版本中提供的 WinDbg 中的新的 JavaScript 扩展性和脚本功能。
- 博客- https://blogs.msdn.microsoft.com/windbg/
- 电子邮件- windbgfb@microsoft.com
Bill 利用了以前在这些情节中的调试器对象模型:
时间线:
[00:00] 欢迎和简介
[00:24] 新 SDK 删除
[00:29] 为什么 JavaScript
[02:07] 新建命令
[03:50] Visual Studio Code
[04:00] 示例 - Hello World
[07:15] 调试器默认命名空间
[09:07] 示例 - 打印所有线程
[10:26] 示例 - 条件断点
[18:13] 'g' vs. 'gc' - 安德鲁是对的! “gc”以与启动相同的方式恢复执行。 因此,如果命中“p”,然后命中包含“gc”的条件断点,则“gc”将完成初始“p”。
[20:40] 示例 - 唯一堆栈
[34:40] 示例 - 加法
问题/评论? 请发送电子邮件到 defragtools@microsoft.com 与我们联系
JavaScript MSDN 文档:
唯一堆栈示例(右图):
“使用严格”;
class __stackEntry { constructor(frameString) { this.threads = []; this.frameString = frameString; this.children = new Map(; }
display(indent)
{
for (var child of this.children.values())
{
host.diagnostics.debugLog(indent, child.frameString, " [Threads In Branch: ");
for (var thread of child.threads)
{
host.diagnostics.debugLog(thread.Id, " ");
}
host.diagnostics.debugLog("]\n");
child.display(indent + " ");
}
}
}
class __stackMap { constructor(process) { this.__process = process; this.__root = new __stackEntry(“”);this.build();}
build()
{
for (var thread of this.__process.Threads)
{
var current = this.__root;
var frameNum = 0;
var frameCount = thread.Stack.Frames.Count();
for (var frameNum = frameCount - 1; frameNum >= 0; --frameNum) {
var frame = thread.Stack.Frames[frameNum];
var frameString = frame.toString();
if (current.children.has(frameString)) {
current = current.children.get(frameString);
current.threads.push(thread);
}
else {
var newEntry = new __stackEntry(frameString);
current.children.set(frameString, newEntry);
current = newEntry;
current.threads.push(thread);
}
}
}
}
findEntry(thread)
{
var current = this.__root;
var frameCount = thread.Stack.Frames.Count();
for (var frameNum = frameCount - 1; frameNum >= 0; --frameNum)
{
var frame = thread.Stack.Frames[frameNum];
var frameString = frame.toString();
if (!current.children.has(frameString))
{
return null;
}
current = current.children.get(frameString);
}
return current;
}
display()
{
this.__root.display("");
}
}
class __threadSameStacks { constructor(thread) { this.__thread = thread; }
getDimensionality()
{
return 1;
}
getValueAt(idx)
{
for (var idxVal of this)
{
var tid = idxVal[Symbol.indicies][0];
if (idxVal[Symbol.indicies][0] == idx && tid != this.__thread.Id)
{
return idxVal.value;
}
}
return undefined;
}
*[Symbol.iterator]()
{
var context = this.__thread.hostContext;
var session = host.namespace.Debugger.Sessions.getValueAt(context);
var process = session.Processes.getValueAt(context);
var map = new __stackMap(process);
var entry = map.findEntry(this.__thread);
if (entry != null)
{
for (var sharingThread of entry.threads)
{
if (sharingThread.Id != this.__thread.Id)
{
yield new host.indexedValue(sharingThread, [sharingThread.Id]);
}
}
}
}
}
class __threadExtension { get IdenticalStacks() { return new __threadSameStacks(this); } } }
function invokeScript() { var map = new __stackMap(host.currentProcess); map.display(); }
function initializeScript() { return [new host.namedModelParent(__threadExtension, “Debugger.Models.Thread”)]; }
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