![]() This means that when you take a step, all threads are allowed to run, and one of your running threads hit this breakpoint before the step completes on your current thread. By default, the debugger will stop on a breakpoint any time it is hit. How often are you debugging multithreaded code, when you hit your first breakpoint, take a step, and then suddenly you are stopped with the yellow arrow on another thread? The unexpected behavior comes from the breakpoint still being set and consequently being hit. Step through one single thread without jumping around We recommend turning it off when you aren’t actively using it. Note: This functionality comes with some performance overhead and can feel like it slows down debugging. Right click on the thread to see available actions you can perform like freezing and switching the active thread.Hover over the thread marker icon to see the thread ids and names for all threads currently stopped on that line of code.A glyph will appear in the breakpoint gutter next to each line of code where at least one thread is currently stopped.In the debugger toolbar, toggle the button “Show Threads in Source”.Show Threads in Sourceĭebugging a multithreaded application is rarely easy, but when you can see in the editor what lines of code each thread in currently on, it gets a lot better. Click Reattach to Process or use shortcut key (Shift +Alt+P).įor more in-depth details about Reattach to Process check out this blog post.When you terminate that debugging session go to the Debug menu on the toolbar.Start from the Attach to Process dialog (Ctrl+Alt+P) and select the process or processes that you want to debug and click “Attach”.It is extremely helpful when you are working on a project where you need to use “Attach to Process” but you find yourself consistently attaching to the same thing session after session. This is a true time-saver introduced in Visual Stuido 2017 that many of you have yet to discover. The handle ($1) won’t change, so you can leave your breakpoint as is between debug sessions. So, if you need to restart debugging, be sure to right click and re-create the object ID. Note: The object ID refers to the object’s address in memory and consequently will change with every new debug session. This will take you to the line of code that is changing the property for this specific instance of the object. Look at the Call Stack and double click on the previous frame.Press Continue (F5) and now you will break in the setter when that property changes for that instance.Go to the setter of the property you care about and add a condition to the breakpoint,.This gives you a handle to that object in memory, referenced by “$1”. When you get to a breakpoint with the interesting instance right click on the object and select Make Object ID.If you are debugging managed code, you can use Make Object ID plus a Conditional Breakpoint to narrow your search for the problem area. You can set a breakpoint on the setter in the class, but this breaks for every instance of the object type! What if you only care about one problematic instance? When debugging C++ code, Data Breakpoints can help you out. Have you been in a situation while debugging where you inspect an object’s property at one breakpoint and by the time you get to the next breakpoint that property has changed unexpectedly. This line will be the next statement to execute when taking a step or pressing Continue (F5). ![]() Click on that glyph and the yellow arrow will move to that line.Ĥ. Hold the CTRL key and notice the Run to Click (Run execution to here) glyph changes into the Set Next Statement glyph.ģ. Hover over the line of code where you want to move the yellow arrow.Ģ. What you probably didn’t know is that as of Visual Studio 2017 version 15,3 Preview there is an even easier way to target a line and Set Next Statement.ġ. You may also know that you grab and drag the yellow arrow up and down in the gutter to move it. Many of you may know about the context menu item Set Next Statement (Ctrl+Shift+F10) that moves the yellow arrow (the instruction pointer) to the target line of code. It is chock-full of tools that can make debugging easier… if you know they exist, and where to find them! Let’s look at 7 lesser known goodies you can use to help you #SuperChargeYourDebugging. The Visual Studio debugger is a magical beast that can save you loads of time while finding and fixing issues in your application.
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