trace – Make Me Engineer

Redirect Trace output to Console

June 9, 2023 by Tarik

You can add the following to your exe’s .config file. <?xml version=”1.0″?> <configuration> <system.diagnostics> <trace autoflush=”true”> <listeners> <add name=”logListener” type=”System.Diagnostics.TextWriterTraceListener” initializeData=”cat.log” /> <add name=”consoleListener” type=”System.Diagnostics.ConsoleTraceListener”/> </listeners> </trace> </system.diagnostics> </configuration> I included the TextWriter as well, in case you’re interested in logging to a file.

How to print the next N executed lines automatically in GDB?

May 31, 2023 by Tarik

This is easy, actually. I’ll give you the bare bones, and you can modify to suit. (gdb) define nstep > set $foo = $arg0 > while ($foo–) > step > end > end (gdb) nstep 100 I’ve done this many times. Hope this helps!

Trace listener to write to a text box (WPF application)

May 4, 2023 by Tarik

I use this for C# winforms, should be easily adjustable to wpf public class MyTraceListener : TraceListener { private TextBoxBase output; public MyTraceListener(TextBoxBase output) { this.Name = “Trace”; this.output = output; } public override void Write(string message) { Action append = delegate() { output.AppendText(string.Format(“[{0}] “, DateTime.Now.ToString())); output.AppendText(message); }; if (output.InvokeRequired) { output.BeginInvoke(append); } else { … Read more

Does java have any mechanism for a VM to trace method calls on itself, without using javaagent, etc?

November 4, 2022 by Tarik

There is no such API provided by the JVM— even for agents started with -javaagent. The JVM TI is a native interface provided for native agents started with the -agent option or for debuggers. Java agents might use the Instrumentation API which provides the lowlevel feature of class instrumentation but no direct profiling capability. There … Read more

Trace Python imports

November 3, 2022 by Tarik

Start the python interpreter with -v: $ python -v -m /usr/lib/python2.6/timeit.py # installing zipimport hook import zipimport # builtin # installed zipimport hook # /usr/lib/python2.6/site.pyc matches /usr/lib/python2.6/site.py import site # precompiled from /usr/lib/python2.6/site.pyc # /usr/lib/python2.6/os.pyc matches /usr/lib/python2.6/os.py import os # precompiled from /usr/lib/python2.6/os.pyc import errno # builtin import posix # builtin # /usr/lib/python2.6/posixpath.pyc matches /usr/lib/python2.6/posixpath.py … Read more

How can I add a Trace() to every method call in C#?

October 4, 2022 by Tarik

Probably your best bet would be to use an AOP (aspect oriented programming) framework to automatically call tracing code before and after a method execution. A popular choice for AOP and .NET is PostSharp.

How to use trace and dbg in Erlang to debug and trace my program?

July 18, 2022 by Tarik

The basic steps of tracing for function calls are on a non-live node: > dbg:start(). % start dbg > dbg:tracer(). % start a simple tracer process > dbg:tp(Module, Function, Arity, []). % specify MFA you are interested in > dbg:p(all, c). % trace calls (c) of that MFA for all processes. … trace here > … Read more

Tool to trace local function calls in Linux

June 28, 2022 by Tarik

Assuming you only want to be notified for specific functions, you can do it like this: compile with debug informations (as you already have symbol informations, you probably also have enough debugs in) given #include <iostream> int fac(int n) { if(n == 0) return 1; return n * fac(n-1); } int main() { for(int i=0;i<4;i++) … Read more

How to echo shell commands as they are executed

June 19, 2022 by Tarik

set -x or set -o xtrace expands variables and prints a little + sign before the line. set -v or set -o verbose does not expand the variables before printing. Use set +x and set +v to turn off the above settings. On the first line of the script, one can put #!/bin/sh -x (or … Read more

Logging best practices [closed]

June 17, 2022 by Tarik

Update: For extensions to System.Diagnostics, providing some of the missing listeners you might want, see Essential.Diagnostics on CodePlex (http://essentialdiagnostics.codeplex.com/) Frameworks Q: What frameworks do you use? A: System.Diagnostics.TraceSource, built in to .NET 2.0. It provides powerful, flexible, high performance logging for applications, however many developers are not aware of its capabilities and do not make … Read more