[PR/24474] Add gdb.lookup_static_symbol to the python API

Similar to lookup_global_symbol, except that it checks the
STATIC_SCOPE.

gdb/ChangeLog:

2019-07-30  Christian Biesinger  <cbiesinger@google.com>

	PR/24474: Add a function to lookup static variables.
	* NEWS: Mention this new function.
	* python/py-symbol.c (gdbpy_lookup_static_symbol): New function.
	* python/python-internal.h (gdbpy_lookup_static_symbol): New function.
	* python/python.c (python_GdbMethods): Add new function.

gdb/doc/ChangeLog:

2019-07-30  Christian Biesinger  <cbiesinger@google.com>

	* python.texi (Symbols In Python): Document new function
	gdb.lookup_static_symbol.

gdb/testsuite/ChangeLog:

2019-07-30  Christian Biesinger  <cbiesinger@google.com>

	* gdb.python/py-symbol.c: Add a static variable and one in an anonymous
	namespace.
	* gdb.python/py-symbol.exp: Test gdb.lookup_static_symbol.

gdb/python/py-symbol.c

@@ -471,6 +471,46 @@ gdbpy_lookup_global_symbol (PyObject *self, PyObject *args, PyObject *kw)
   return sym_obj;
 }
 
+/* Implementation of
+   gdb.lookup_static_symbol (name [, domain) -> symbol or None.  */
+
+PyObject *
+gdbpy_lookup_static_symbol (PyObject *self, PyObject *args, PyObject *kw)
+{
+  const char *name;
+  int domain = VAR_DOMAIN;
+  static const char *keywords[] = { "name", "domain", NULL };
+  struct symbol *symbol = NULL;
+  PyObject *sym_obj;
+
+  if (!gdb_PyArg_ParseTupleAndKeywords (args, kw, "s|i", keywords, &name,
+					&domain))
+    return NULL;
+
+  try
+    {
+      symbol = lookup_static_symbol (name, (domain_enum) domain).symbol;
+    }
+  catch (const gdb_exception &except)
+    {
+      GDB_PY_HANDLE_EXCEPTION (except);
+    }
+
+  if (symbol)
+    {
+      sym_obj = symbol_to_symbol_object (symbol);
+      if (!sym_obj)
+	return NULL;
+    }
+  else
+    {
+      sym_obj = Py_None;
+      Py_INCREF (Py_None);
+    }
+
+  return sym_obj;
+}
+
 /* This function is called when an objfile is about to be freed.
    Invalidate the symbol as further actions on the symbol would result
    in bad data.  All access to obj->symbol should be gated by

gdb/python/python-internal.h

@@ -424,6 +424,8 @@ PyObject *gdbpy_frame_stop_reason_string (PyObject *, PyObject *);
 PyObject *gdbpy_lookup_symbol (PyObject *self, PyObject *args, PyObject *kw);
 PyObject *gdbpy_lookup_global_symbol (PyObject *self, PyObject *args,
 				      PyObject *kw);
+PyObject *gdbpy_lookup_static_symbol (PyObject *self, PyObject *args,
+				      PyObject *kw);
 PyObject *gdbpy_start_recording (PyObject *self, PyObject *args);
 PyObject *gdbpy_current_recording (PyObject *self, PyObject *args);
 PyObject *gdbpy_stop_recording (PyObject *self, PyObject *args);

gdb/python/python.c

@@ -1978,6 +1978,10 @@ a boolean indicating if name is a field of the current implied argument\n\
     METH_VARARGS | METH_KEYWORDS,
     "lookup_global_symbol (name [, domain]) -> symbol\n\
 Return the symbol corresponding to the given name (or None)." },
+  { "lookup_static_symbol", (PyCFunction) gdbpy_lookup_static_symbol,
+    METH_VARARGS | METH_KEYWORDS,
+    "lookup_static_symbol (name [, domain]) -> symbol\n\
+Return the static-linkage symbol corresponding to the given name (or None)." },
 
   { "lookup_objfile", (PyCFunction) gdbpy_lookup_objfile,
     METH_VARARGS | METH_KEYWORDS,