new api class: SBFile

Summary:
SBFile is a scripting API wrapper for lldb_private::File

This is the first step in a project to enable arbitrary python
io.IOBase file objects -- including those that override the read()
and write() methods -- to be used as the main debugger IOStreams.

Currently this is impossible because python file objects must first
be converted into FILE* streams by SWIG in order to be passed into
the debugger.

full prototype: https://github.com/smoofra/llvm-project/tree/files

Reviewers: JDevlieghere, jasonmolenda, zturner, jingham, labath

Reviewed By: labath

Subscribers: labath, mgorny, lldb-commits

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D67793

llvm-svn: 373562

1 files changed, 14 insertions, 0 deletions

diff --git a/lldb/packages/Python/lldbsuite/test/python_api/default-constructor/TestDefaultConstructorForAPIObjects.py b/lldb/packages/Python/lldbsuite/test/python_api/default-constructor/TestDefaultConstructorForAPIObjects.py
index e48b90e2ee9..75bd4a6760d 100644
--- a/lldb/packages/Python/lldbsuite/test/python_api/default-constructor/TestDefaultConstructorForAPIObjects.py
+++ b/lldb/packages/Python/lldbsuite/test/python_api/default-constructor/TestDefaultConstructorForAPIObjects.py
@@ -194,6 +194,20 @@ class APIDefaultConstructorTestCase(TestBase):
 
     @add_test_categories(['pyapi'])
     @no_debug_info_test
+    def test_SBFile(self):
+        sbf = lldb.SBFile()
+        self.assertFalse(sbf.IsValid())
+        self.assertFalse(bool(sbf))
+        e, n = sbf.Write(b'foo')
+        self.assertTrue(e.Fail())
+        self.assertEqual(n, 0)
+        buffer = bytearray(100)
+        e, n = sbf.Read(buffer)
+        self.assertEqual(n, 0)
+        self.assertTrue(e.Fail())
+
+    @add_test_categories(['pyapi'])
+    @no_debug_info_test
     def test_SBInstruction(self):
         obj = lldb.SBInstruction()
         if self.TraceOn():