1 files changed, 154 insertions, 0 deletions
diff --git a/lldb/source/Target/ThreadPlanStepInRange.cpp b/lldb/source/Target/ThreadPlanStepInRange.cpp
new file mode 100644
index 00000000000..f62fdb87c7f
--- /dev/null
+++ b/lldb/source/Target/ThreadPlanStepInRange.cpp
@@ -0,0 +1,154 @@
+//===-- ThreadPlanStepInRange.cpp -------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/Target/ThreadPlanStepInRange.h"
+
+// C Includes
+// C++ Includes
+// Other libraries and framework includes
+// Project includes
+
+#include "lldb/lldb-private-log.h"
+#include "lldb/Core/Log.h"
+#include "lldb/Core/Stream.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Target/RegisterContext.h"
+#include "lldb/Target/Thread.h"
+#include "lldb/Target/ThreadPlanStepOut.h"
+#include "lldb/Target/ThreadPlanStepThrough.h"
+
+using namespace lldb;
+using namespace lldb_private;
+
+uint32_t ThreadPlanStepInRange::s_default_flag_values = ThreadPlanShouldStopHere::eAvoidNoDebug;
+
+//----------------------------------------------------------------------
+// ThreadPlanStepInRange: Step through a stack range, either stepping over or into
+// based on the value of \a type.
+//----------------------------------------------------------------------
+
+ThreadPlanStepInRange::ThreadPlanStepInRange
+(
+    Thread &thread,
+    const AddressRange &range,
+    const SymbolContext &addr_context,
+    lldb::RunMode stop_others
+) :
+    ThreadPlanStepRange ("Step Range stepping in", thread, range, addr_context, stop_others),
+    ThreadPlanShouldStopHere (this, ThreadPlanStepInRange::DefaultShouldStopHereCallback, NULL)
+{
+    SetFlagsToDefault ();
+}
+
+ThreadPlanStepInRange::~ThreadPlanStepInRange ()
+{
+}
+
+void
+ThreadPlanStepInRange::GetDescription (Stream *s, lldb::DescriptionLevel level)
+{
+    if (level == lldb::eDescriptionLevelBrief)
+        s->Printf("step in");
+    else
+    {
+        s->Printf ("Stepping through range (stepping into functions): ");
+        m_address_range.Dump (s, &m_thread.GetProcess(), Address::DumpStyleLoadAddress);
+    }
+}
+
+bool
+ThreadPlanStepInRange::ShouldStop (Event *event_ptr)
+{
+    Log *log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP);
+    m_no_more_plans = false;
+    
+    if (log)
+    {
+        StreamString s;
+        s.Address (m_thread.GetRegisterContext()->GetPC(), m_thread.GetProcess().GetAddressByteSize());
+        log->Printf("ThreadPlanStepInRange reached %s.", s.GetData());
+    }
+
+    // If we're still in the range, keep going.
+    if (InRange())
+        return false;
+
+    // If we're in an older frame then we should stop.
+    if (FrameIsOlder())
+        return true;
+        
+    // See if we are in a place we should step through (i.e. a trampoline of some sort):
+    // One tricky bit here is that some stubs don't push a frame, so we have to check
+    // both the case of a frame that is younger, or the same as this frame.  
+    // However, if the frame is the same, and we are still in the symbol we started
+    // in, the we don't need to do this.  This first check isn't strictly necessary,
+    // but it is more efficient.
+    
+    if (!FrameIsYounger() && InSymbol())
+    {
+        SetPlanComplete();
+        return true;
+    }
+    
+    ThreadPlan* new_plan = NULL;
+
+    bool stop_others;
+    if (m_stop_others == lldb::eOnlyThisThread)
+        stop_others = true;
+    else
+        stop_others = false;
+        
+    new_plan = m_thread.QueueThreadPlanForStepThrough (false, stop_others);
+    // If not, give the "should_stop" callback a chance to push a plan to get us out of here.
+    // But only do that if we actually have stepped in.
+    if (!new_plan && FrameIsYounger())
+        new_plan = InvokeShouldStopHereCallback();
+
+    if (new_plan == NULL)
+    {
+        m_no_more_plans = true;
+        SetPlanComplete();
+        return true;
+    }
+    else
+    {
+        m_no_more_plans = false;
+        return false;
+    }
+}
+
+void
+ThreadPlanStepInRange::SetFlagsToDefault ()
+{
+    GetFlags().Set(ThreadPlanStepInRange::s_default_flag_values);
+}
+
+void
+ThreadPlanStepInRange::SetDefaultFlagValue (uint32_t new_value)
+{
+    // TODO: Should we test this for sanity?
+    ThreadPlanStepInRange::s_default_flag_values = new_value;
+}
+
+ThreadPlan *
+ThreadPlanStepInRange::DefaultShouldStopHereCallback (ThreadPlan *current_plan, Flags &flags, void *baton)
+{
+    if (flags.IsSet(eAvoidNoDebug))
+    {
+        StackFrame *frame = current_plan->GetThread().GetStackFrameAtIndex(0).get();
+
+        if (!frame->HasDebugInformation())
+        {
+            // FIXME: Make sure the ThreadPlanForStepOut does the right thing with inlined functions.
+            return current_plan->GetThread().QueueThreadPlanForStepOut (false, NULL, true, current_plan->StopOthers(), eVoteNo, eVoteNoOpinion);
+        }
+    }
+
+    return NULL;
+}