[ProcessWindows] Implement breakpoint stop / resume on Windows.

This patch implements basic support for stopping at breakpoints
and resuming later.  While a breakpoint is stopped at, LLDB will
cease to process events in the debug loop, effectively suspending
the process, and then resume later when ProcessWindows::DoResume
is called.

As a side effect, this also correctly handles the loader breakpoint
(i.e. the initial stop) so that LLDB goes through the correct state
sequence during the initial process launch.

llvm-svn: 221642

1 files changed, 20 insertions, 1 deletions

diff --git a/lldb/source/Plugins/Process/Windows/ProcessWindows.cpp b/lldb/source/Plugins/Process/Windows/ProcessWindows.cpp
index db410c35a20..511dd356bf0 100644
--- a/lldb/source/Plugins/Process/Windows/ProcessWindows.cpp
+++ b/lldb/source/Plugins/Process/Windows/ProcessWindows.cpp
@@ -28,6 +28,7 @@
 #include "lldb/Target/Target.h"
 
 #include "DebuggerThread.h"
+#include "ExceptionRecord.h"
 #include "LocalDebugDelegate.h"
 #include "ProcessMessages.h"
 #include "ProcessWindows.h"
@@ -144,6 +145,7 @@ ProcessWindows::DoLaunch(Module *exe_module,
 
     launch_info.SetProcessID(process.GetProcessId());
     SetID(process.GetProcessId());
+
     return result;
 }
 
@@ -151,6 +153,11 @@ Error
 ProcessWindows::DoResume()
 {
     Error error;
+    if (!m_active_exception)
+        return error;
+
+    m_debugger->ContinueAsyncException(ExceptionResult::Handled);
+    SetPrivateState(eStateRunning);
     return error;
 }
 
@@ -240,6 +247,7 @@ void
 ProcessWindows::OnExitProcess(const ProcessMessageExitProcess &message)
 {
     SetProcessExitStatus(nullptr, GetID(), true, 0, message.GetExitCode());
+    SetPrivateState(eStateExited);
 }
 
 void
@@ -248,9 +256,20 @@ ProcessWindows::OnDebuggerConnected(const ProcessMessageDebuggerConnected &messa
     ::SetEvent(m_data_up->m_launched_event);
 }
 
-void
+ExceptionResult
 ProcessWindows::OnDebugException(const ProcessMessageException &message)
 {
+    ExceptionResult result = ExceptionResult::Handled;
+    const ExceptionRecord &record = message.GetExceptionRecord();
+    m_active_exception.reset(new ExceptionRecord(record));
+    switch (record.GetExceptionCode())
+    {
+        case EXCEPTION_BREAKPOINT:
+            SetPrivateState(eStateStopped);
+            result = ExceptionResult::WillHandle;
+            break;
+    }
+    return result;
 }
 
 void