Index: test/functionalities/attach_resume/TestAttachResume.py
===================================================================
--- test/functionalities/attach_resume/TestAttachResume.py
+++ test/functionalities/attach_resume/TestAttachResume.py
@@ -14,7 +14,6 @@
 
     mydir = TestBase.compute_mydir(__file__)
 
-    @expectedFlakeyLinux('llvm.org/pr19310')
     @expectedFailureFreeBSD('llvm.org/pr19310')
     @skipIfRemote
     @dwarf_test
@@ -23,7 +22,6 @@
         self.buildDwarf()
         self.process_attach_continue_interrupt_detach()
 
-    @expectedFlakeyLinux('llvm.org/pr19478') # intermittent ~2/14 runs
     @skipIfRemote
     def process_attach_continue_interrupt_detach(self):
         """Test attach/continue/interrupt/detach"""
@@ -35,67 +33,39 @@
 
         self.runCmd("process attach -p " + str(popen.pid))
 
-        self._state = 0
-        def process_events():
-            event = lldb.SBEvent()
-            while self.dbg.GetListener().GetNextEvent(event):
-                self._state = lldb.SBProcess.GetStateFromEvent(event)
-
-        # using process.GetState() does not work: llvm.org/pr16172
-        def wait_for_state(s, timeout=5):
-            t = 0
-            period = 0.1
-            while self._state != s:
-                process_events()
-                time.sleep(period)
-                t += period
-                if t > timeout:
-                    return False
-            return True
-
         self.setAsync(True)
+        listener = self.dbg.GetListener()
 
         self.runCmd("c")
-        self.assertTrue(wait_for_state(lldb.eStateRunning),
-            'Process not running after continue')
+        lldbutil.expect_state_changes(self, listener, [lldb.eStateRunning])
 
         self.runCmd("process interrupt")
-        self.assertTrue(wait_for_state(lldb.eStateStopped),
-            'Process not stopped after interrupt')
+        lldbutil.expect_state_changes(self, listener, [lldb.eStateStopped])
 
         # be sure to continue/interrupt/continue (r204504)
         self.runCmd("c")
-        self.assertTrue(wait_for_state(lldb.eStateRunning),
-            'Process not running after continue')
+        lldbutil.expect_state_changes(self, listener, [lldb.eStateRunning])
 
         self.runCmd("process interrupt")
-        self.assertTrue(wait_for_state(lldb.eStateStopped),
-            'Process not stopped after interrupt')
+        lldbutil.expect_state_changes(self, listener, [lldb.eStateStopped])
 
         # check that this breakpoint is auto-cleared on detach (r204752)
         self.runCmd("br set -f main.cpp -l %u" % (line_number('main.cpp', '// Set breakpoint here')))
 
         self.runCmd("c")
-        self.assertTrue(wait_for_state(lldb.eStateRunning),
-            'Process not running after continue')
-
-        self.assertTrue(wait_for_state(lldb.eStateStopped),
-            'Process not stopped after breakpoint')
-        # This test runs a bunch of threads in the same little function with this
-        # breakpoint.  We want to make sure the breakpoint got hit at least once,
-        # but more than one thread may hit it at a time.  So we really only care
-        # that is isn't 0 times, not how many times it is.
+        lldbutil.expect_state_changes(self, listener, [lldb.eStateRunning, lldb.eStateStopped])
         self.expect('br list', 'Breakpoint not hit',
-            patterns = ['hit count = [1-9]'])
+            substrs = ['hit count = 1'])
+
+        # Make sure the breakpoint is not hit again.
+        self.expect("expr debugger_flag = false", substrs=[" = false"]);
 
         self.runCmd("c")
-        self.assertTrue(wait_for_state(lldb.eStateRunning),
-            'Process not running after continue')
+        lldbutil.expect_state_changes(self, listener, [lldb.eStateRunning])
 
         # make sure to detach while in running state (r204759)
         self.runCmd("detach")
-        self.assertTrue(wait_for_state(lldb.eStateDetached),
-            'Process not detached after detach')
+        lldbutil.expect_state_changes(self, listener, [lldb.eStateDetached])
 
 if __name__ == '__main__':
     import atexit
Index: test/functionalities/attach_resume/main.cpp
===================================================================
--- test/functionalities/attach_resume/main.cpp
+++ test/functionalities/attach_resume/main.cpp
@@ -8,15 +8,17 @@
 #include <sys/prctl.h>
 #endif
 
+volatile bool debugger_flag = true; // The debugger will flip this to false
+
 void *start(void *data)
 {
     int i;
     size_t idx = (size_t)data;
     for (i=0; i<30; i++)
     {
-        if ( idx == 0 )
-            std::this_thread::sleep_for(std::chrono::microseconds(1));
-        std::this_thread::sleep_for(std::chrono::seconds(1)); // Set breakpoint here
+        if ( idx == 0 && debugger_flag)
+            std::this_thread::sleep_for(std::chrono::microseconds(1)); // Set breakpoint here
+        std::this_thread::sleep_for(std::chrono::seconds(1));
     }
     return 0;
 }
Index: test/lldbutil.py
===================================================================
--- test/lldbutil.py
+++ test/lldbutil.py
@@ -721,6 +721,21 @@
     if string_buffer:
         return output.getvalue()
 
+def expect_state_changes(test, listener, states, timeout = 5):
+    """Listens for state changed events on the listener and makes sure they match what we
+    expect. Stop-and-restart events (where GetRestartedFromEvent() returns true) are ignored."""
+    event = lldb.SBEvent()
+    for expected_state in states:
+        if not listener.WaitForEvent(timeout, event):
+            test.Fail("Timed out while waiting for a transition to state %s" %
+                lldb.SBDebugger.StateAsCString(expected_state))
+
+        got_state = lldb.SBProcess.GetStateFromEvent(event)
+        if got_state == lldb.eStateStopped and lldb.SBProcess.GetRestartedFromEvent(event):
+            continue
+
+        test.assertEqual(expected_state, got_state)
+
 # ===================================
 # Utility functions related to Frames
 # ===================================