Added the concept of a Read-Eval-Print-Loop to LLDB.
A REPL takes over the command line and typically treats input as source code.
REPLs can also do code completion. The REPL class allows its subclasses to
implement the language-specific functionality without having to know about the
IOHandler-specific internals.
Also added a PluginManager-based way of getting to a REPL given a language and
a target.
Also brought in some utility code and expression options that are useful for
REPLs, such as line offsets for expressions, ANSI terminal coloring of errors,
and a few IOHandler convenience functions.
llvm-svn: 250753
diff --git a/lldb/source/Core/PluginManager.cpp b/lldb/source/Core/PluginManager.cpp
index b47a982..97116dd 100644
--- a/lldb/source/Core/PluginManager.cpp
+++ b/lldb/source/Core/PluginManager.cpp
@@ -2648,6 +2648,106 @@
return NULL;
}
+#pragma mark REPL
+
+struct REPLInstance
+{
+ REPLInstance() :
+ name(),
+ description(),
+ create_callback(NULL)
+ {
+ }
+
+ ConstString name;
+ std::string description;
+ REPLCreateInstance create_callback;
+};
+
+typedef std::vector<REPLInstance> REPLInstances;
+
+static Mutex &
+GetREPLMutex ()
+{
+ static Mutex g_instances_mutex (Mutex::eMutexTypeRecursive);
+ return g_instances_mutex;
+}
+
+static REPLInstances &
+GetREPLInstances ()
+{
+ static REPLInstances g_instances;
+ return g_instances;
+}
+
+bool
+PluginManager::RegisterPlugin (const ConstString &name,
+ const char *description,
+ REPLCreateInstance create_callback)
+{
+ if (create_callback)
+ {
+ REPLInstance instance;
+ assert ((bool)name);
+ instance.name = name;
+ if (description && description[0])
+ instance.description = description;
+ instance.create_callback = create_callback;
+ Mutex::Locker locker (GetREPLMutex ());
+ GetREPLInstances ().push_back (instance);
+ }
+ return false;
+}
+
+bool
+PluginManager::UnregisterPlugin (REPLCreateInstance create_callback)
+{
+ if (create_callback)
+ {
+ Mutex::Locker locker (GetREPLMutex ());
+ REPLInstances &instances = GetREPLInstances ();
+
+ REPLInstances::iterator pos, end = instances.end();
+ for (pos = instances.begin(); pos != end; ++ pos)
+ {
+ if (pos->create_callback == create_callback)
+ {
+ instances.erase(pos);
+ return true;
+ }
+ }
+ }
+ return false;
+}
+
+REPLCreateInstance
+PluginManager::GetREPLCreateCallbackAtIndex (uint32_t idx)
+{
+ Mutex::Locker locker (GetREPLMutex ());
+ REPLInstances &instances = GetREPLInstances ();
+ if (idx < instances.size())
+ return instances[idx].create_callback;
+ return NULL;
+}
+
+REPLCreateInstance
+PluginManager::GetREPLCreateCallbackForPluginName (const ConstString &name)
+{
+ if (name)
+ {
+ Mutex::Locker locker (GetREPLMutex ());
+ REPLInstances &instances = GetREPLInstances ();
+
+ REPLInstances::iterator pos, end = instances.end();
+ for (pos = instances.begin(); pos != end; ++ pos)
+ {
+ if (name == pos->name)
+ return pos->create_callback;
+ }
+ }
+ return NULL;
+}
+
#pragma mark PluginManager
void