Fix error handling in NativeProcessLinux::AttachToInferior

[ovyalov]

Summary

Fix error handling in NativeProcessLinux::AttachToInferior - some return values were ignored.

[ovyalov]

Friendly ping.

[clayborg]

Looks good.

[ovyalov]

Thank you for the review!

Shawn, could you help with submitting this CL if it looks good to you?

[Eugene.Zelenko]

Committed in r221647.

source/Plugins/Process/Linux/NativeProcessLinux.cpp

         if (log)
             log->Printf ("NativeProcessLinux::%s (pid = %" PRIi64 "): no default platform set", __FUNCTION__, pid);
         error.SetErrorString ("no default platform available");
+        return;
     }
 
     // Gather info about the process.
     ProcessInstanceInfo process_info;
-    platform_sp->GetProcessInfo (pid, process_info);
+    if (!platform_sp->GetProcessInfo (pid, process_info))
+    {
+        if (log)
+            log->Printf ("NativeProcessLinux::%s (pid = %" PRIi64 "): failed to get process info", __FUNCTION__, pid);
+        error.SetErrorString ("failed to get process info");
+        return;
+    }
 
     // Resolve the executable module
     ModuleSP exe_module_sp;