Added new target instance settings for execution settings:

Targets can now specify some additional parameters for when we debug 
executables that can help with plug-in selection:

target.execution-level = auto | user | kernel
target.execution-mode  = auto | dynamic | static
target.execution-os-type = auto | none | halted | live

On some systems, the binaries that are created are the same wether you use
them to debug a kernel, or a user space program. Many times inspecting an 
object file can reveal what an executable should be. For these cases we can
now be a little more complete by specifying wether to detect all of these
things automatically (inspect the main executable file and select a plug-in
accordingly), or manually to force the selection of certain plug-ins.

To do this we now allow the specficifation of wether one is debugging a user
space program (target.execution-level = user) or a kernel program 
(target.execution-level = kernel).

We can also specify if we want to debug a program where shared libraries
are dynamically loaded using a DynamicLoader plug-in 
(target.execution-mode = dynamic), or wether we will treat all symbol files
as already linked at the correct address (target.execution-mode = static).

We can also specify if the inferior we are debugging is being debugged on 
a bare board (target.execution-os-type = none), or debugging an OS where
we have a JTAG or other direct connection to the inferior stops the entire
OS (target.execution-os-type = halted), or if we are debugging a program on
something that has live debug services (target.execution-os-type = live).

For the "target.execution-os-type = halted" mode, we will need to create 
ProcessHelper plug-ins that allow us to extract the process/thread and other
OS information by reading/writing memory.

This should allow LLDB to be used for a wide variety of debugging tasks and
handle them all correctly.

llvm-svn: 125815

1 files changed, 10 insertions, 6 deletions

diff --git a/lldb/source/Interpreter/CommandInterpreter.cpp b/lldb/source/Interpreter/CommandInterpreter.cpp
index 2a84eef91f1..b6cd3c73818 100644
--- a/lldb/source/Interpreter/CommandInterpreter.cpp
+++ b/lldb/source/Interpreter/CommandInterpreter.cpp
@@ -1687,12 +1687,17 @@ CommandInterpreter::OutputFormattedHelpText (Stream &strm,
     int indent_size = max_word_len + strlen (separator) + 2;
 
     strm.IndentMore (indent_size);
-
-    int len = indent_size + strlen (help_text) + 1;
-    char *text  = (char *) malloc (len);
-    sprintf (text, "%-*s %s %s",  max_word_len, word_text, separator, help_text);
+    
+    StreamString text_strm;
+    text_strm.Printf ("%-*s %s %s",  max_word_len, word_text, separator, help_text);
+    
+    size_t len = text_strm.GetSize();
+    const char *text = text_strm.GetData();
     if (text[len - 1] == '\n')
-        text[--len] = '\0';
+    {
+        text_strm.EOL();
+        len = text_strm.GetSize();
+    }
 
     if (len  < max_columns)
     {
@@ -1750,7 +1755,6 @@ CommandInterpreter::OutputFormattedHelpText (Stream &strm,
     }
     strm.EOL();
     strm.IndentLess(indent_size);
-    free (text);
 }
 
 void