proc: document thread safety of Process interface.

CHANGELOG.md

@@ -5,6 +5,12 @@ This project adheres to Semantic Versioning.
 
 All changes mention the author, unless contributed by me (@derekparker).
 
+## [RELEASE TO BE DEFINED] DATE TO BE DEFINED
+
+### Fixed
+
+- Data races in tests (@aarzilli)
+
 ## [1.0.0-rc.2] DATE TO BE DEFINED
 
 ### Added

pkg/proc/interface.go

@@ -6,6 +6,11 @@ import (
 
 // Process represents the target of the debugger. This
 // target could be a system process, core file, etc.
+//
+// Implementations of Process are not required to be thread safe and users
+// of Process should not assume they are.
+// There is one exception to this rule: it is safe to call RequestManualStop
+// concurrently with ContinueOnce.
 type Process interface {
 	Info
 	ProcessManipulation