Check in an initial implementation of the "breakpoint clear" command, whose purpose is clear

the breakpoint associated with the (filename, line_number) combo when an arrow is pointing to
a source position using Emacs Grand Unified Debugger library to interact with lldb.

The current implmentation is insufficient in that it only asks the breakpoint whether it is
associated with a breakpoint resolver with FileLine type and whether it matches the (filename, line_number)
combo.  There are other breakpoint resolver types whose breakpoint locations can potentially
match the (filename, line_number) combo.

The BreakpointResolver, BreakpointResolverName, BreakpointResolverAddress, and BreakpointResolverFileLine
classes have extra static classof methods to support LLVM style type inquiry through isa, cast, and dyn_cast.

The Breakpoint class has an API method bool GetMatchingFileLine(...) which is invoked from CommandObjectBreak.cpp
to implement the "breakpoint clear" command.

llvm-svn: 117562

1 files changed, 61 insertions, 1 deletions

diff --git a/lldb/source/Commands/CommandObjectBreakpoint.h b/lldb/source/Commands/CommandObjectBreakpoint.h
index 45bdb16a255..fb13576479a 100644
--- a/lldb/source/Commands/CommandObjectBreakpoint.h
+++ b/lldb/source/Commands/CommandObjectBreakpoint.h
@@ -43,7 +43,7 @@ public:
 };
 
 //-------------------------------------------------------------------------
-// CommandObjectMultiwordBreakpointSet
+// CommandObjectdBreakpointSet
 //-------------------------------------------------------------------------
 
 
@@ -271,6 +271,66 @@ private:
 };
 
 //-------------------------------------------------------------------------
+// CommandObjectBreakpointClear
+//-------------------------------------------------------------------------
+
+
+class CommandObjectBreakpointClear : public CommandObject
+{
+public:
+
+    typedef enum BreakpointClearType
+    {
+        eClearTypeInvalid,
+        eClearTypeFileAndLine,
+    } BreakpointClearType;
+
+    CommandObjectBreakpointClear (CommandInterpreter &interpreter);
+
+    virtual
+    ~CommandObjectBreakpointClear ();
+
+    virtual bool
+    Execute (Args& command,
+             CommandReturnObject &result);
+
+    virtual Options *
+    GetOptions ();
+
+    class CommandOptions : public Options
+    {
+    public:
+
+        CommandOptions ();
+
+        virtual
+        ~CommandOptions ();
+
+        virtual Error
+        SetOptionValue (int option_idx, const char *option_arg);
+
+        void
+        ResetOptionValues ();
+
+        const lldb::OptionDefinition*
+        GetDefinitions ();
+
+        // Options table: Required for subclasses of Options.
+
+        static lldb::OptionDefinition g_option_table[];
+
+        // Instance variables to hold the values for command options.
+
+        std::string m_filename;
+        uint32_t m_line_num;
+
+    };
+
+private:
+    CommandOptions m_options;
+};
+
+//-------------------------------------------------------------------------
 // CommandObjectBreakpointDelete
 //-------------------------------------------------------------------------