Debugging Blink

Child process auto-attach

To debug Blink and other child processes, a debugger should support child process auto-attach.

There are some extensions to make this happen:

• Visual Studio 2022 https://marketplace.visualstudio.com/items?itemName=vsdbgplat.MicrosoftChildProcessDebuggingPowerTool2022
• Visual Studio Code https://github.com/albertziegenhagel/childdebugger-vscode

Disable pointer compression

V8 and Blink uses pointer compression by default. This lowers RAM usage, but prevents debuggers to display any members properly.

To disable pointers compression add this to out/<Config>/gn.args:

v8_enable_pointer_compression = false
cppgc_enable_pointer_compression = false
cppgc_enable_caged_heap = false