leak

Overview ¶

Package leak provide goroutine leak detection using pprof labels instead of stack-trace heuristics.

Instead of parsing runtime.Stack and filtering known system goroutines, we label the tested function's goroutine using pprof.Do.

Child goroutines inherit the label automatically. After the function returns, any goroutines still carrying our label are leaks.

This approach makes leak detection immune to goroutines running concurrently to the leak check (e.g. parallel tests) and immune to background goroutines started by other programs (e.g. database connections, http or grpc pools...).