stacktrace.js v2.0 is out, featuring ES6 support, better stack frames, and more!
The BCD file contains critical configuration parameters necessary for booting.
: Ensure the server is correctly activated. If the edition needs to be set (e.g., from Evaluation to Standard), use DISM commands with a valid product key. Verify Roles Server Manager to ensure all previously installed roles and features are functioning correctly. step-by-step breakdown
Execute the BCDBoot tool to fetch pristine system deployment files directly from your central OS drive partition and write them cleanly back into your mapped EFI directory: bcdboot C:\Windows /s Z: /f UEFI Use code with caution.
If boot fails with 0xc0000001 or registry corruption:
: This powerful tool recreates the entire system partition by copying boot files directly from the Windows partition.
After this, exit the command prompt and restart the server.
First, you need to identify your system and boot partition drive letters. You can do this using the diskpart tool:
The BCD registry file tells the computer where to look for the operating system files. If the BCD file is missing, modified incorrectly, or corrupted, the system will not boot. Step 1: Scan for Windows Installations Verify Roles Server Manager to ensure all previously
Repairing a Windows Server 2012 R2 boot failure typically involves using the to rebuild the Boot Configuration Data (BCD) or revert problematic updates. 1. Access the Recovery Environment
Insert the Windows Server 2012 R2 installation media and boot from it. Select your language preferences and click Repair your computer (bottom left corner). Troubleshoot Advanced options Command Prompt Step 2: Basic Boot Repair (MBR/BCD)
More than meets the eye
5 tools in 1!
stacktrace.js - instrument your code and generate stack traces
stacktrace-gps - turn partial code location into precise code location
stack-generator - generate artificial backtrace in old browsers
stackframe - JS Object representation of a stack frame
Not just for Errors
You can use Stacktrace.get() anywhere! Try it next time you're tempted to use debugger;
Use it during development when you want to understand what's calling a function. Just write StackTrace.instrument(interestingFn, callback, errback);:The bootrec tool is the standard first line
In version 1.x, We've switched from a synchronous API to an asynchronous one using Promises because synchronous ajax calls are deprecated and frowned upon due to performance implications.
All methods now return stackframes. This Object representation is modeled closely after StackFrame representations in Gecko and V8. All you have to do to get stacktrace.js v0.x behavior is call .toString() on a stackframe.
Use Case: Give me a trace from wherever I am right now
var error = new Error('Boom');
printStackTrace({e: error});
==> Array[String]
v1.x:
var error = new Error('Boom');
StackTrace.fromError(error).then(callback).catch(errback);
==> Promise(Array[StackFrame], Error);
If this is all you need, you don't even need the full stacktrace.js library! Just use error-stack-parser!
ErrorStackParser.parse(new Error('boom'));
Use Case: Give me a trace anytime this function is called
Instrumenting now takes Function references instead of Strings.
v0.x:
function interestingFn() {...};
var p = new printStackTrace.implementation();
p.instrumentFunction(this, 'interestingFn', logStackTrace);
==> Function (instrumented)
p.deinstrumentFunction(this, 'interestingFn');
==> Function (original)
v1.x:
function interestingFn() {...};
StackTrace.instrument(interestingFn, callback, errback);
==> Function (instrumented)
StackTrace.deinstrument(interestingFn);
==> Function (original)
Windows Server 2012 R2 Boot Repair !new! 95%
.parseError()
Error: Error message
at baz (http://url.com/file.js:10:7)
at bar (http://url.com/file.js:7:17)
at foo (http://url.com/file.js:4:17)
at http://url.com/file.js:13:21
Parsed Error
.get()
function foo() {
console.log('foo');
bar();
}
function bar() {
baz();
}
function baz() {
function showTrace(stack) {
var event = new CustomEvent('st:try-show', {detail: stack});
document.body.dispatchEvent(event);
}
function showError(error) {
var event = new CustomEvent('st:try-error', {detail: error});
document.body.dispatchEvent(event);
}
StackTrace.get()
.then(showTrace)
.catch(showError);
}
foo();
StackTrace output
Windows Server 2012 R2 Boot Repair !new! 95%
The BCD file contains critical configuration parameters necessary for booting.
: Ensure the server is correctly activated. If the edition needs to be set (e.g., from Evaluation to Standard), use DISM commands with a valid product key. Verify Roles Server Manager to ensure all previously installed roles and features are functioning correctly. step-by-step breakdown
Execute the BCDBoot tool to fetch pristine system deployment files directly from your central OS drive partition and write them cleanly back into your mapped EFI directory: bcdboot C:\Windows /s Z: /f UEFI Use code with caution.
:The bootrec tool is the standard first line of defense for repairing common startup issues.
If boot fails with 0xc0000001 or registry corruption:
: This powerful tool recreates the entire system partition by copying boot files directly from the Windows partition.
After this, exit the command prompt and restart the server.
First, you need to identify your system and boot partition drive letters. You can do this using the diskpart tool:
The BCD registry file tells the computer where to look for the operating system files. If the BCD file is missing, modified incorrectly, or corrupted, the system will not boot. Step 1: Scan for Windows Installations
Repairing a Windows Server 2012 R2 boot failure typically involves using the to rebuild the Boot Configuration Data (BCD) or revert problematic updates. 1. Access the Recovery Environment
Insert the Windows Server 2012 R2 installation media and boot from it. Select your language preferences and click Repair your computer (bottom left corner). Troubleshoot Advanced options Command Prompt Step 2: Basic Boot Repair (MBR/BCD)
Windows Server 2012 R2 Boot Repair !new! 95%
Turn partial code location into precise code location
This library accepts a code location (in the form of a StackFrame) and returns a new StackFrame with a more accurate location (using source maps) and guessed function names.
Usage
var stackframe = new StackFrame({fileName: 'http://localhost:3000/file.min.js', lineNumber: 1, columnNumber: 3284});
var callback = function myCallback(foundFunctionName) { console.log(foundFunctionName); };
// Such meta. Wow
var errback = function myErrback(error) { console.log(StackTrace.fromError(error)); };
var gps = new StackTraceGPS();
// Pinpoint actual function name and source-mapped location
gps.pinpoint(stackframe).then(callback, errback);
//===> Promise(StackFrame({functionName: 'fun', fileName: 'file.js', lineNumber: 203, columnNumber: 9}), Error)
// Better location/name information from source maps
gps.getMappedLocation(stackframe).then(callback, errback);
//===> Promise(StackFrame({fileName: 'file.js', lineNumber: 203, columnNumber: 9}), Error)
// Get function name from location information
gps.findFunctionName(stackframe).then(callback, errback);
//===> Promise(StackFrame({functionName: 'fun', fileName: 'http://localhost:3000/file.min.js', lineNumber: 1, columnNumber: 3284}), Error)
Simple, cross-browser Error parser. This library parses and extracts function names, URLs, line numbers, and column numbers from the given Error's stack as an Array of StackFrames.
Once you have parsed out StackFrames, you can do much more interesting things. See stacktrace-gps.
Note that in IE9 and earlier, Error objects don't have enough information to extract much of anything. In IE 10, Errors are given a stack once they're thrown.