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Heap tracing

Heap Tracing allows tracing of code which allocates/frees memory. More information in heap tracing documentation. Please also review System behaviour analysis for systemView tracing configuration.

Let's open a ESP-IDF project. For this tutorial we will use the system/sysview_tracing_heap_log example.

  1. Click menu View -> Command Palette... and search for the ESP-IDF: Show Examples Projects command and choose Use current ESP-IDF (/path/to/esp-idf). If the user doesn't see the option, please review the setup in Install tutorial.

  2. A window will be open with a list a projects, go the system section and choose the sysview_tracing_heap_log. You will see a Create project using example sysview_tracing_heap_log button in the top and a description of the project below. Click the button and the project will be opened in a new window.

SystemView Heap and Log tracing example

For this example, the project has been already configured for application tracing purposes. For more information please take a look at the Application Level Tracing library documentation.

  1. Configure, build and flash your project as explained in the Basic use tutorial.

  2. Click the ESP-IDF Explorer in the activity bar. On the IDF APP TRACER section, click the Start heap Trace. This will execute the extension's openOCD server and send the corresponding tracing commands to generate a tracing log. You can see the generated tracing log in the APP TRACE ARCHIVES named with Heap Trace Log #1. Each time you execute Start heap Trace a new tracing will be generated and shown in the archives list. You can also start tracing by running the ESP-IDF: App Trace command.

NOTE: The openOCD server output is shown in menu View -> Output -> OpenOCD.

NOTE: Make sure that openOCD configuration files are properly configured as described in Debugging tutorial.

Start heap tracing

  1. Click on Heap Trace Log #1 and choose the Heap Tracing option for IDF Tracing report window. Click Show report button to reload the visualization.

Trace Report

  1. Click on Heap Trace Log #1 and choose the SystemView Tracing option for the ESP System View Report window.

SystemView Trace Report