Re:Instrumentation in Go
by Julio-Guerra on Tuesday May 26, 2020 @08:48AM
(#23310432)
We haven't modified the compiler but instead plugged into it an external instrumentation tool using the compiler option `-toolexec`.
With this option, the compiler invokes every toolchain binary (compile, asm, link, etc.) through the provided program. So you can basically write a proxy program intercepting calls to `compile` to do source-code instrumentation, exactly like you would with go generate, but now automatically done during compilation on every package.
With this option, the compiler invokes every toolchain binary (compile, asm, link, etc.) through the provided program. So you can basically write a proxy program intercepting calls to `compile` to do source-code instrumentation, exactly like you would with go generate, but now automatically done during compilation on every package.