proc/native: disable async preemption on freebsd

pkg/proc/native/proc.go

@@ -306,7 +306,7 @@ func (dbp *nativeProcess) initialize(path string, debugInfoDirs []string) (*proc
 		Path:                path,
 		DebugInfoDirs:       debugInfoDirs,
 		WriteBreakpoint:     dbp.writeBreakpoint,
-		DisableAsyncPreempt: runtime.GOOS == "windows",
+		DisableAsyncPreempt: runtime.GOOS == "windows" || runtime.GOOS == "freebsd",
 		StopReason:          stopReason})
 }
 

pkg/proc/native/proc_freebsd.go

@@ -62,6 +62,7 @@ func Launch(cmd []string, wd string, foreground bool, debugInfoDirs []string, tt
 		process.Stdout = os.Stdout
 		process.Stderr = os.Stderr
 		process.SysProcAttr = &syscall.SysProcAttr{Ptrace: true, Setpgid: true, Foreground: foreground}
+		process.Env = proc.DisableAsyncPreemptEnv()
 		if foreground {
 			signal.Ignore(syscall.SIGTTOU, syscall.SIGTTIN)
 			process.Stdin = os.Stdin