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[gnome-builder/wip/chergert/debugger] debugger: add some debugger types we'll need going forward

commit d9d1cd0d909e06977244c7d397028547539b07cc
Author: Christian Hergert <chergert redhat com>
Date:   Thu Apr 13 21:35:08 2017 -0700

    debugger: add some debugger types we'll need going forward

 libide/Makefile.am                      |    8 ++
 libide/debugger/ide-debugger-frame.c    |   97 +++++++++++++++
 libide/debugger/ide-debugger-frame.h    |   60 +++++++++
 libide/debugger/ide-debugger-stack.c    |  107 ++++++++++++++++
 libide/debugger/ide-debugger-stack.h    |   52 ++++++++
 libide/debugger/ide-debugger-thread.c   |  200 +++++++++++++++++++++++++++++++
 libide/debugger/ide-debugger-thread.h   |   50 ++++++++
 libide/debugger/ide-debugger-variable.c |   91 ++++++++++++++
 libide/debugger/ide-debugger-variable.h |   52 ++++++++
 9 files changed, 717 insertions(+), 0 deletions(-)
---
diff --git a/libide/Makefile.am b/libide/Makefile.am
index 8dc9ee0..adf2cf2 100644
--- a/libide/Makefile.am
+++ b/libide/Makefile.am
@@ -54,9 +54,13 @@ libide_1_0_la_public_headers =                                              \
        debugger/ide-debug-manager.h                                        \
        debugger/ide-debugger-breakpoints.h                                 \
        debugger/ide-debugger-editor-view-addin.h                           \
+       debugger/ide-debugger-frame.h                                       \
        debugger/ide-debugger-perspective.h                                 \
        debugger/ide-debugger-workbench-addin.h                             \
        debugger/ide-debugger-gutter-renderer.h                             \
+       debugger/ide-debugger-stack.h                                       \
+       debugger/ide-debugger-thread.h                                      \
+       debugger/ide-debugger-variable.h                                    \
        debugger/ide-debugger-view.h                                        \
        devices/ide-device-manager.h                                        \
        devices/ide-device-provider.h                                       \
@@ -244,9 +248,13 @@ libide_1_0_la_public_sources =                                              \
        debugger/ide-debug-manager.c                                        \
        debugger/ide-debugger-breakpoints.c                                 \
        debugger/ide-debugger-editor-view-addin.c                           \
+       debugger/ide-debugger-frame.c                                       \
        debugger/ide-debugger-perspective.c                                 \
        debugger/ide-debugger-workbench-addin.c                             \
        debugger/ide-debugger-gutter-renderer.c                             \
+       debugger/ide-debugger-stack.c                                       \
+       debugger/ide-debugger-thread.c                                      \
+       debugger/ide-debugger-variable.c                                    \
        debugger/ide-debugger-view.c                                        \
        devices/ide-device-manager.c                                        \
        devices/ide-device-provider.c                                       \
diff --git a/libide/debugger/ide-debugger-frame.c b/libide/debugger/ide-debugger-frame.c
new file mode 100644
index 0000000..22cfe64
--- /dev/null
+++ b/libide/debugger/ide-debugger-frame.c
@@ -0,0 +1,97 @@
+/* ide-debugger-frame.c
+ *
+ * Copyright (C) 2017 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define G_LOG_DOMAIN "ide-debugger-frame"
+
+#include "ide-debugger-frame.h"
+
+G_DEFINE_ABSTRACT_TYPE (IdeDebuggerFrame, ide_debugger_frame, G_TYPE_OBJECT)
+
+static void
+ide_debugger_frame_class_init (IdeDebuggerFrameClass *klass)
+{
+}
+
+static void
+ide_debugger_frame_init (IdeDebuggerFrame *self)
+{
+}
+
+guint
+ide_debugger_frame_get_index (IdeDebuggerFrame *self)
+{
+  g_return_val_if_fail (IDE_IS_DEBUGGER_FRAME (self), 0);
+
+  if (IDE_DEBUGGER_FRAME_GET_CLASS (self)->get_index)
+    return IDE_DEBUGGER_FRAME_GET_CLASS (self)->get_index (self);
+
+  return 0;
+}
+
+gchar *
+ide_debugger_frame_get_address (IdeDebuggerFrame *self)
+{
+  g_return_val_if_fail (IDE_IS_DEBUGGER_FRAME (self), 0);
+
+  if (IDE_DEBUGGER_FRAME_GET_CLASS (self)->get_address)
+    return IDE_DEBUGGER_FRAME_GET_CLASS (self)->get_address (self);
+
+  return NULL;
+}
+
+gchar *
+ide_debugger_frame_get_location (IdeDebuggerFrame *self)
+{
+  g_return_val_if_fail (IDE_IS_DEBUGGER_FRAME (self), 0);
+
+  if (IDE_DEBUGGER_FRAME_GET_CLASS (self)->get_location)
+    return IDE_DEBUGGER_FRAME_GET_CLASS (self)->get_location (self);
+
+  return NULL;
+}
+
+gchar *
+ide_debugger_frame_get_function (IdeDebuggerFrame *self)
+{
+  g_return_val_if_fail (IDE_IS_DEBUGGER_FRAME (self), 0);
+
+  if (IDE_DEBUGGER_FRAME_GET_CLASS (self)->get_function)
+    return IDE_DEBUGGER_FRAME_GET_CLASS (self)->get_function (self);
+
+  return NULL;
+}
+
+/**
+ * ide_debugger_frame_get_arguments:
+ * @self: a #IdeDebuggerFrame
+ *
+ * Gets the arguments passed to the function as #IdeDebuggerVariable.
+ *
+ * Returns: (transfer container) (element-type Ide.DebuggerVariable): The
+ *   arguments for the function call in this frame.
+ */
+GPtrArray *
+ide_debugger_frame_get_arguments (IdeDebuggerFrame *self)
+{
+  g_return_val_if_fail (IDE_IS_DEBUGGER_FRAME (self), 0);
+
+  if (IDE_DEBUGGER_FRAME_GET_CLASS (self)->get_arguments)
+    return IDE_DEBUGGER_FRAME_GET_CLASS (self)->get_arguments (self);
+
+  return NULL;
+}
diff --git a/libide/debugger/ide-debugger-frame.h b/libide/debugger/ide-debugger-frame.h
new file mode 100644
index 0000000..5bedeef
--- /dev/null
+++ b/libide/debugger/ide-debugger-frame.h
@@ -0,0 +1,60 @@
+/* ide-debugger-frame.h
+ *
+ * Copyright (C) 2017 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef IDE_DEBUGGER_FRAME_H
+#define IDE_DEBUGGER_FRAME_H
+
+#include <gio/gio.h>
+
+#include "debugger/ide-debugger-variable.h"
+
+G_BEGIN_DECLS
+
+#define IDE_TYPE_DEBUGGER_FRAME (ide_debugger_frame_get_type())
+
+G_DECLARE_DERIVABLE_TYPE (IdeDebuggerFrame, ide_debugger_frame, IDE, DEBUGGER_FRAME, GObject)
+
+struct _IdeDebuggerFrameClass
+{
+  GObjectClass parent_class;
+
+  guint      (*get_index)     (IdeDebuggerFrame *self);
+  gchar     *(*get_function)  (IdeDebuggerFrame *self);
+  GPtrArray *(*get_arguments) (IdeDebuggerFrame *self);
+  gchar     *(*get_location)  (IdeDebuggerFrame *self);
+  gchar     *(*get_address)   (IdeDebuggerFrame *self);
+
+  gpointer _reserved1;
+  gpointer _reserved2;
+  gpointer _reserved3;
+  gpointer _reserved4;
+  gpointer _reserved5;
+  gpointer _reserved6;
+  gpointer _reserved7;
+  gpointer _reserved8;
+};
+
+guint      ide_debugger_frame_get_index     (IdeDebuggerFrame *self);
+gchar     *ide_debugger_frame_get_address   (IdeDebuggerFrame *self);
+gchar     *ide_debugger_frame_get_location  (IdeDebuggerFrame *self);
+gchar     *ide_debugger_frame_get_function  (IdeDebuggerFrame *self);
+GPtrArray *ide_debugger_frame_get_arguments (IdeDebuggerFrame *self);
+
+G_END_DECLS
+
+#endif /* IDE_DEBUGGER_FRAME_H */
diff --git a/libide/debugger/ide-debugger-stack.c b/libide/debugger/ide-debugger-stack.c
new file mode 100644
index 0000000..6c92144
--- /dev/null
+++ b/libide/debugger/ide-debugger-stack.c
@@ -0,0 +1,107 @@
+/* ide-debugger-stack.c
+ *
+ * Copyright (C) 2017 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define G_LOG_DOMAIN "ide-debugger-stack"
+
+#include "ide-debugger-stack.h"
+
+static void list_model_iface_init (GListModelInterface *iface);
+
+G_DEFINE_ABSTRACT_TYPE_WITH_CODE (IdeDebuggerStack, ide_debugger_stack, G_TYPE_OBJECT,
+                                  G_IMPLEMENT_INTERFACE (G_TYPE_LIST_MODEL, list_model_iface_init))
+
+static void
+ide_debugger_stack_class_init (IdeDebuggerStackClass *klass)
+{
+}
+
+static void
+ide_debugger_stack_init (IdeDebuggerStack *self)
+{
+}
+
+/**
+ * ide_debugger_stack_get_frame:
+ * @self: An #IdeDebuggerStack
+ * @position: the position within the stack, starting from 0
+ *
+ * It is an error to call this function with a position that is outside the
+ * range of the available frames in this stack.
+ *
+ * The index starts from 0.
+ *
+ * See ide_debugger_stack_get_n_frames() for the number of frames within
+ * this stack.
+ *
+ * Returns: (transfer full): An #IdeDebuggerFrame.
+ */
+IdeDebuggerFrame *
+ide_debugger_stack_get_frame (IdeDebuggerStack *self,
+                              guint             position)
+{
+  g_return_val_if_fail (IDE_IS_DEBUGGER_STACK (self), NULL);
+
+#ifdef IDE_ENABLE_TRACE
+  g_assert_cmpint (position, <, ide_debugger_stack_get_n_frames (self));
+#endif
+
+  return IDE_DEBUGGER_STACK_GET_CLASS (self)->get_frame (self, position);
+}
+
+/**
+ * ide_debugger_stack_get_n_frames:
+ * @self: An #IdeDebuggerStack
+ *
+ * Gets the number of frames within this stack trace.
+ *
+ * Returns: The number of frames in the stack trace.
+ */
+guint
+ide_debugger_stack_get_n_frames (IdeDebuggerStack *self)
+{
+  g_return_val_if_fail (IDE_IS_DEBUGGER_STACK (self), 0);
+
+  return IDE_DEBUGGER_STACK_GET_CLASS (self)->get_n_frames (self);
+}
+
+static guint
+ide_debugger_stack_get_n_items (GListModel *model)
+{
+  return ide_debugger_stack_get_n_frames (IDE_DEBUGGER_STACK (model));
+}
+
+static GType
+ide_debugger_stack_get_item_type (GListModel *model)
+{
+  return IDE_TYPE_DEBUGGER_FRAME;
+}
+
+static gpointer
+ide_debugger_stack_get_item (GListModel *model,
+                             guint       position)
+{
+  return ide_debugger_stack_get_frame (IDE_DEBUGGER_STACK (model), position);
+}
+
+static void
+list_model_iface_init (GListModelInterface *iface)
+{
+  iface->get_n_items = ide_debugger_stack_get_n_items;
+  iface->get_item_type = ide_debugger_stack_get_item_type;
+  iface->get_item = ide_debugger_stack_get_item;
+}
diff --git a/libide/debugger/ide-debugger-stack.h b/libide/debugger/ide-debugger-stack.h
new file mode 100644
index 0000000..f360964
--- /dev/null
+++ b/libide/debugger/ide-debugger-stack.h
@@ -0,0 +1,52 @@
+/* ide-debugger-stack.h
+ *
+ * Copyright (C) 2017 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef IDE_DEBUGGER_STACK_H
+#define IDE_DEBUGGER_STACK_H
+
+#include <gio/gio.h>
+
+#include "debugger/ide-debugger-frame.h"
+
+G_BEGIN_DECLS
+
+#define IDE_TYPE_DEBUGGER_STACK (ide_debugger_stack_get_type())
+
+G_DECLARE_DERIVABLE_TYPE (IdeDebuggerStack, ide_debugger_stack, IDE, DEBUGGER_STACK, GObject)
+
+struct _IdeDebuggerStackClass
+{
+  GObjectClass parent;
+
+  guint             (*get_n_frames) (IdeDebuggerStack *self);
+  IdeDebuggerFrame *(*get_frame)    (IdeDebuggerStack *self,
+                                     guint             position);
+
+  gpointer _reserved1;
+  gpointer _reserved2;
+  gpointer _reserved3;
+  gpointer _reserved4;
+};
+
+guint             ide_debugger_stack_get_n_frames (IdeDebuggerStack *self);
+IdeDebuggerFrame *ide_debugger_stack_get_frame    (IdeDebuggerStack *self,
+                                                   guint             position);
+
+G_END_DECLS
+
+#endif /* IDE_DEBUGGER_STACK_H */
diff --git a/libide/debugger/ide-debugger-thread.c b/libide/debugger/ide-debugger-thread.c
new file mode 100644
index 0000000..7220818
--- /dev/null
+++ b/libide/debugger/ide-debugger-thread.c
@@ -0,0 +1,200 @@
+/* ide-debugger-thread.c
+ *
+ * Copyright (C) 2017 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "ide-debugger-thread.h"
+
+typedef struct
+{
+  gchar *id;
+  gchar *name;
+} IdeDebuggerThreadPrivate;
+
+G_DEFINE_TYPE_WITH_PRIVATE (IdeDebuggerThread, ide_debugger_thread, G_TYPE_OBJECT)
+
+enum {
+  PROP_0,
+  PROP_ID,
+  PROP_NAME,
+  N_PROPS
+};
+
+static GParamSpec *properties [N_PROPS];
+
+IdeDebuggerThread *
+ide_debugger_thread_new (void)
+{
+  return g_object_new (IDE_TYPE_DEBUGGER_THREAD, NULL);
+}
+
+static void
+ide_debugger_thread_finalize (GObject *object)
+{
+  IdeDebuggerThread *self = (IdeDebuggerThread *)object;
+  IdeDebuggerThreadPrivate *priv = ide_debugger_thread_get_instance_private (self);
+
+  g_clear_pointer (&priv->id, g_free);
+  g_clear_pointer (&priv->name, g_free);
+
+  G_OBJECT_CLASS (ide_debugger_thread_parent_class)->finalize (object);
+}
+
+static void
+ide_debugger_thread_get_property (GObject    *object,
+                                  guint       prop_id,
+                                  GValue     *value,
+                                  GParamSpec *pspec)
+{
+  IdeDebuggerThread *self = IDE_DEBUGGER_THREAD (object);
+
+  switch (prop_id)
+    {
+    case PROP_ID:
+      g_value_set_string (value, ide_debugger_thread_get_id (self));
+      break;
+
+    case PROP_NAME:
+      g_value_set_string (value, ide_debugger_thread_get_name (self));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+ide_debugger_thread_set_property (GObject      *object,
+                                  guint         prop_id,
+                                  const GValue *value,
+                                  GParamSpec   *pspec)
+{
+  IdeDebuggerThread *self = IDE_DEBUGGER_THREAD (object);
+
+  switch (prop_id)
+    {
+    case PROP_ID:
+      ide_debugger_thread_set_id (self, g_value_get_string (value));
+      break;
+
+    case PROP_NAME:
+      ide_debugger_thread_set_name (self, g_value_get_string (value));
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+    }
+}
+
+static void
+ide_debugger_thread_class_init (IdeDebuggerThreadClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->finalize = ide_debugger_thread_finalize;
+  object_class->get_property = ide_debugger_thread_get_property;
+  object_class->set_property = ide_debugger_thread_set_property;
+
+  /**
+   * IdeDebuggerThread:id:
+   *
+   * The "id" property contains the identifier of the thread within the debugger.
+   * This may not match the id of the thread to the operating system, but simply
+   * for internal access within the debugger.
+   *
+   * It generally starts from 1 and is monotonically increasing.
+   */
+  properties [PROP_ID] =
+    g_param_spec_string ("id",
+                         "Id",
+                         "The id of the thread",
+                         NULL,
+                         (G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS));
+
+  /**
+   * IdeDebuggerThread:name:
+   *
+   * If the process has specified a name for the thread and the debugger has access to it,
+   * this is where that thread name should be stored.
+   *
+   * This allows the UI to display more than just "Thread 2" when referring to the thread.
+   */
+  properties [PROP_NAME] =
+    g_param_spec_string ("name",
+                         "Name",
+                         "The name of the thread",
+                         NULL,
+                         (G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS));
+
+  g_object_class_install_properties (object_class, N_PROPS, properties);
+}
+
+static void
+ide_debugger_thread_init (IdeDebuggerThread *self)
+{
+}
+
+const gchar *
+ide_debugger_thread_get_id (IdeDebuggerThread *self)
+{
+  IdeDebuggerThreadPrivate *priv = ide_debugger_thread_get_instance_private (self);
+
+  g_return_val_if_fail (IDE_IS_DEBUGGER_THREAD (self), NULL);
+
+  return priv->id;
+}
+
+void
+ide_debugger_thread_set_id (IdeDebuggerThread *self,
+                            const gchar       *id)
+{
+  IdeDebuggerThreadPrivate *priv = ide_debugger_thread_get_instance_private (self);
+
+  g_return_if_fail (IDE_IS_DEBUGGER_THREAD (self));
+
+  if (g_strcmp0 (priv->id, id) != 0)
+    {
+      g_free (priv->id);
+      priv->id = g_strdup (id);
+      g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_ID]);
+    }
+}
+
+const gchar *
+ide_debugger_thread_get_name (IdeDebuggerThread *self)
+{
+  IdeDebuggerThreadPrivate *priv = ide_debugger_thread_get_instance_private (self);
+
+  g_return_val_if_fail (IDE_IS_DEBUGGER_THREAD (self), NULL);
+
+  return priv->name;
+}
+
+void
+ide_debugger_thread_set_name (IdeDebuggerThread *self,
+                              const gchar       *name)
+{
+  IdeDebuggerThreadPrivate *priv = ide_debugger_thread_get_instance_private (self);
+
+  g_return_if_fail (IDE_IS_DEBUGGER_THREAD (self));
+
+  if (g_strcmp0 (priv->name, name) != 0)
+    {
+      g_free (priv->name);
+      priv->name = g_strdup (name);
+      g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_NAME]);
+    }
+}
diff --git a/libide/debugger/ide-debugger-thread.h b/libide/debugger/ide-debugger-thread.h
new file mode 100644
index 0000000..953168d
--- /dev/null
+++ b/libide/debugger/ide-debugger-thread.h
@@ -0,0 +1,50 @@
+/* ide-debugger-thread.h
+ *
+ * Copyright (C) 2017 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef IDE_DEBUGGER_THREAD_H
+#define IDE_DEBUGGER_THREAD_H
+
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+#define IDE_TYPE_DEBUGGER_THREAD (ide_debugger_thread_get_type())
+
+G_DECLARE_DERIVABLE_TYPE (IdeDebuggerThread, ide_debugger_thread, IDE, DEBUGGER_THREAD, GObject)
+
+struct _IdeDebuggerThreadClass
+{
+  GObjectClass parent;
+
+  gpointer _reserved1;
+  gpointer _reserved2;
+  gpointer _reserved3;
+  gpointer _reserved4;
+};
+
+IdeDebuggerThread *ide_debugger_thread_new      (void);
+const gchar       *ide_debugger_thread_get_id   (IdeDebuggerThread *self);
+void               ide_debugger_thread_set_id   (IdeDebuggerThread *self,
+                                                 const gchar       *id);
+const gchar       *ide_debugger_thread_get_name (IdeDebuggerThread *self);
+void               ide_debugger_thread_set_name (IdeDebuggerThread *self,
+                                                 const gchar       *name);
+
+G_END_DECLS
+
+#endif /* IDE_DEBUGGER_THREAD_H */
diff --git a/libide/debugger/ide-debugger-variable.c b/libide/debugger/ide-debugger-variable.c
new file mode 100644
index 0000000..dcd71af
--- /dev/null
+++ b/libide/debugger/ide-debugger-variable.c
@@ -0,0 +1,91 @@
+/* ide-debugger-variable.c
+ *
+ * Copyright (C) 2017 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define G_LOG_DOMAIN "ide-debugger-variable"
+
+#include "ide-debugger-variable.h"
+
+G_DEFINE_ABSTRACT_TYPE (IdeDebuggerVariable, ide_debugger_variable, G_TYPE_OBJECT)
+
+static void
+ide_debugger_variable_class_init (IdeDebuggerVariableClass *klass)
+{
+}
+
+static void
+ide_debugger_variable_init (IdeDebuggerVariable *self)
+{
+}
+
+/**
+ * ide_debugger_variable_get_name:
+ * @self: a #IdeDebuggerVariable
+ *
+ * Gets the name of the variable if available.
+ *
+ * Returns: (nullable) (transfer full): The variable name as a string.
+ */
+gchar *
+ide_debugger_variable_get_name (IdeDebuggerVariable *self)
+{
+  g_return_val_if_fail (IDE_IS_DEBUGGER_VARIABLE (self), NULL);
+
+  if (IDE_DEBUGGER_VARIABLE_GET_CLASS (self)->get_name)
+    return IDE_DEBUGGER_VARIABLE_GET_CLASS (self)->get_name (self);
+
+  return NULL;
+}
+
+/**
+ * ide_debugger_variable_get_type_name:
+ * @self: a #IdeDebuggerVariable
+ *
+ * Gets the type name of the variable as a string. This will be language
+ * specific.
+ *
+ * Returns: (nullable) (transfer full): The type name as a string.
+ */
+gchar *
+ide_debugger_variable_get_type_name (IdeDebuggerVariable *self)
+{
+  g_return_val_if_fail (IDE_IS_DEBUGGER_VARIABLE (self), NULL);
+
+  if (IDE_DEBUGGER_VARIABLE_GET_CLASS (self)->get_type_name)
+    return IDE_DEBUGGER_VARIABLE_GET_CLASS (self)->get_type_name (self);
+
+  return NULL;
+}
+
+/**
+ * ide_debugger_variable_get_value:
+ * @self: a #IdeDebuggerVariable
+ *
+ * Gets the contents of the variable as a #GBytes.
+ *
+ * Returns: (nullable) (transfer full): A #GBytes or %NULL
+ */
+GBytes *
+ide_debugger_variable_get_value (IdeDebuggerVariable *self)
+{
+  g_return_val_if_fail (IDE_IS_DEBUGGER_VARIABLE (self), NULL);
+
+  if (IDE_DEBUGGER_VARIABLE_GET_CLASS (self)->get_value)
+    return IDE_DEBUGGER_VARIABLE_GET_CLASS (self)->get_value (self);
+
+  return NULL;
+}
diff --git a/libide/debugger/ide-debugger-variable.h b/libide/debugger/ide-debugger-variable.h
new file mode 100644
index 0000000..a9eaa9a
--- /dev/null
+++ b/libide/debugger/ide-debugger-variable.h
@@ -0,0 +1,52 @@
+/* ide-debugger-variable.h
+ *
+ * Copyright (C) 2017 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef IDE_DEBUGGER_VARIABLE_H
+#define IDE_DEBUGGER_VARIABLE_H
+
+#include <gio/gio.h>
+
+G_BEGIN_DECLS
+
+#define IDE_TYPE_DEBUGGER_VARIABLE (ide_debugger_variable_get_type())
+
+G_DECLARE_DERIVABLE_TYPE (IdeDebuggerVariable, ide_debugger_variable, IDE, DEBUGGER_VARIABLE, GObject)
+
+struct _IdeDebuggerVariableClass
+{
+  GObjectClass parent_class;
+
+  gchar  *(*get_name)      (IdeDebuggerVariable *self);
+  gchar  *(*get_type_name) (IdeDebuggerVariable *self);
+  GBytes *(*get_value)     (IdeDebuggerVariable *self);
+
+  /* TODO: How do we want to do complex field types? */
+
+  gpointer _reserved1;
+  gpointer _reserved2;
+  gpointer _reserved3;
+  gpointer _reserved4;
+};
+
+gchar  *ide_debugger_variable_get_name      (IdeDebuggerVariable *self);
+gchar  *ide_debugger_variable_get_type_name (IdeDebuggerVariable *self);
+GBytes *ide_debugger_variable_get_value     (IdeDebuggerVariable *self);
+
+G_END_DECLS
+
+#endif /* IDE_DEBUGGER_VARIABLE_H */
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