Add an "Avoid Frames matching this regular expression" to ThreadPlanStepInRange.

This relies on ThreadPlanStepOut working correctly, which it doesn't currently for Inlined functions, so this feature is only partially useful until we take care of Stepping Out of inlined functions.
Added an option to "thread step-in" to set the avoid regular expression.  This is mostly for testing, once the Setting code is redone, we'll move this to a general setting.

llvm-svn: 108036

lldb/include/lldb/Target/ThreadPlanStepInRange.h

@@ -36,6 +36,8 @@ public:
     virtual bool
     ShouldStop (Event *event_ptr);
 
+    void SetAvoidRegexp(const char *name);
+
     static ThreadPlan *
     DefaultShouldStopHereCallback (ThreadPlan *current_plan, Flags &flags, void *baton);
 
@@ -51,6 +53,9 @@ protected:
 
     virtual void
     SetFlagsToDefault ();
+    
+    bool
+    FrameMatchesAvoidRegexp ();
 
 private:
 
@@ -67,6 +72,7 @@ private:
     // from step in.
 
     static uint32_t s_default_flag_values;
+    std::auto_ptr<RegularExpression> m_avoid_regexp_ap;
 
     DISALLOW_COPY_AND_ASSIGN (ThreadPlanStepInRange);
 

lldb/source/Commands/CommandObjectThread.cpp

@@ -383,6 +383,12 @@ public:
                         error.SetErrorStringWithFormat("Invalid enumeration value for option '%c'.\n", short_option);
                 }
                 break;
+                case 'r':
+                {
+                    m_avoid_regexp.clear();
+                    m_avoid_regexp.assign(option_arg);
+                }
+                break;
                 default:
                     error.SetErrorStringWithFormat("Invalid short option character '%c'.\n", short_option);
                     break;
@@ -397,6 +403,7 @@ public:
             Options::ResetOptionValues();
             m_avoid_no_debug = true;
             m_run_mode = eOnlyDuringStepping;
+            m_avoid_regexp.clear();
         }
 
         const lldb::OptionDefinition*
@@ -412,6 +419,7 @@ public:
         // Instance variables to hold the values for command options.
         bool m_avoid_no_debug;
         RunMode m_run_mode;
+        std::string m_avoid_regexp;
     };
 
     CommandObjectThreadStepWithTypeAndScope (const char *name,
@@ -514,6 +522,11 @@ public:
                                                                     frame->GetSymbolContext(eSymbolContextEverything), 
                                                                     stop_other_threads,
                                                                     m_options.m_avoid_no_debug);
+                    if (new_plan && !m_options.m_avoid_regexp.empty())
+                    {
+                        ThreadPlanStepInRange *step_in_range_plan = static_cast<ThreadPlanStepInRange *> (new_plan);
+                        step_in_range_plan->SetAvoidRegexp(m_options.m_avoid_regexp.c_str());
+                    }
                 }
                 else
                     new_plan = thread->QueueThreadPlanForStepSingleInstruction (false, abort_other_plans, bool_stop_other_threads);
@@ -621,6 +634,7 @@ CommandObjectThreadStepWithTypeAndScope::CommandOptions::g_option_table[] =
 {
 { LLDB_OPT_SET_1, false, "avoid_no_debug", 'a', required_argument, NULL,               0, "<avoid_no_debug>", "Should step-in step over functions with no debug information"},
 { LLDB_OPT_SET_1, false, "run_mode",       'm', required_argument, g_tri_running_mode, 0, "<run_mode>",       "Determine how to run other threads while stepping this one"},
+{ LLDB_OPT_SET_1, false, "regexp_to_avoid",'r', required_argument, NULL, 0, "<avoid_regexp>",       "Should step-in step over functions matching this regexp"},
 { 0, false, NULL, 0, 0, NULL, 0, NULL, NULL }
 };
 

lldb/source/Target/ThreadPlanStepInRange.cpp

@@ -17,11 +17,13 @@
 #include "lldb/lldb-private-log.h"
 #include "lldb/Core/Log.h"
 #include "lldb/Core/Stream.h"
+#include "lldb/Symbol/Symbol.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"
+#include "lldb/Core/RegularExpression.h"
 
 using namespace lldb;
 using namespace lldb_private;
@@ -44,6 +46,7 @@ ThreadPlanStepInRange::ThreadPlanStepInRange
     ThreadPlanShouldStopHere (this, ThreadPlanStepInRange::DefaultShouldStopHereCallback, NULL)
 {
     SetFlagsToDefault ();
+    // SetAvoidRegexp("^std\\:\\:.*");
 }
 
 ThreadPlanStepInRange::~ThreadPlanStepInRange ()
@@ -129,6 +132,15 @@ ThreadPlanStepInRange::SetFlagsToDefault ()
     GetFlags().Set(ThreadPlanStepInRange::s_default_flag_values);
 }
 
+void 
+ThreadPlanStepInRange::SetAvoidRegexp(const char *name)
+{
+    if (m_avoid_regexp_ap.get() == NULL)
+        m_avoid_regexp_ap.reset (new RegularExpression(name));
+
+    m_avoid_regexp_ap->Compile (name);
+}
+
 void
 ThreadPlanStepInRange::SetDefaultFlagValue (uint32_t new_value)
 {
@@ -136,19 +148,53 @@ ThreadPlanStepInRange::SetDefaultFlagValue (uint32_t new_value)
     ThreadPlanStepInRange::s_default_flag_values = new_value;
 }
 
+bool
+ThreadPlanStepInRange::FrameMatchesAvoidRegexp ()
+{
+    StackFrame *frame = GetThread().GetStackFrameAtIndex(0).get();
+
+    if (m_avoid_regexp_ap.get() != NULL)
+    {
+        SymbolContext sc = frame->GetSymbolContext(eSymbolContextSymbol);
+        if (sc.symbol != NULL)
+        {
+            const char *unnamed_symbol = "<UNKNOWN>";
+            const char *sym_name = sc.symbol->GetMangled().GetName().AsCString(unnamed_symbol);
+            if (strcmp (sym_name, unnamed_symbol) != 0)
+               return m_avoid_regexp_ap->Execute(sym_name);
+        }
+    }
+    return false;
+}
+
 ThreadPlan *
 ThreadPlanStepInRange::DefaultShouldStopHereCallback (ThreadPlan *current_plan, Flags &flags, void *baton)
 {
+    bool should_step_out = false;
+    StackFrame *frame = current_plan->GetThread().GetStackFrameAtIndex(0).get();
+
     if (flags.IsSet(eAvoidNoDebug))
     {
-        StackFrame *frame = current_plan->GetThread().GetStackFrameAtIndex(0).get();
-
         if (!frame->HasDebugInformation())
+            should_step_out = true;
+    }
+    
+    if (!should_step_out)
+    {
+        if (current_plan->GetKind() == eKindStepInRange)
         {
-            // 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);
+            ThreadPlanStepInRange *step_in_range_plan = static_cast<ThreadPlanStepInRange *> (current_plan);
+            should_step_out = step_in_range_plan->FrameMatchesAvoidRegexp ();
         }
     }
+    
+    if (should_step_out)
+    {
+        // 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;
 }