SBFile::GetFile: convert SBFile back into python native files.

Summary:
This makes SBFile::GetFile public and adds a SWIG typemap to convert
the result back into a python native file.

If the underlying File itself came from a python file, it is returned
identically.   Otherwise a new python file object is created using
the file descriptor.

Reviewers: JDevlieghere, jasonmolenda, labath

Reviewed By: labath

Subscribers: lldb-commits

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D68737

llvm-svn: 374911

1 files changed, 34 insertions, 1 deletions

diff --git a/lldb/packages/Python/lldbsuite/test/python_api/file_handle/TestFileHandle.py b/lldb/packages/Python/lldbsuite/test/python_api/file_handle/TestFileHandle.py
index 577c6b3e88f..1bd002e6bb7 100644
--- a/lldb/packages/Python/lldbsuite/test/python_api/file_handle/TestFileHandle.py
+++ b/lldb/packages/Python/lldbsuite/test/python_api/file_handle/TestFileHandle.py
@@ -772,7 +772,21 @@ class FileHandleTestCase(lldbtest.TestBase):
 
 
     @add_test_categories(['pyapi'])
-    @expectedFailureAll() # FIXME implement SBFile::GetFile
+    def test_stdout_file(self):
+        with open(self.out_filename, 'w') as f:
+            status = self.debugger.SetOutputFile(f)
+            self.assertTrue(status.Success())
+            self.handleCmd(r"script sys.stdout.write('foobar\n')")
+        with open(self.out_filename, 'r') as f:
+            # In python2 sys.stdout.write() returns None, which
+            # the REPL will ignore, but in python3 it will
+            # return the number of bytes written, which the REPL
+            # will print out.
+            lines = [x for x in f.read().strip().split() if x != "7"]
+            self.assertEqual(lines, ["foobar"])
+
+
+    @add_test_categories(['pyapi'])
     @skipIf(py_version=['<', (3,)])
     def test_identity(self):
 
@@ -826,3 +840,22 @@ class FileHandleTestCase(lldbtest.TestBase):
 
         with open(self.out_filename, 'r') as f:
             self.assertEqual("foobar", f.read().strip())
+
+
+    @add_test_categories(['pyapi'])
+    def test_back_and_forth(self):
+        with open(self.out_filename, 'w') as f:
+            # at each step here we're borrowing the file, so we have to keep
+            # them all alive until the end.
+            sbf = lldb.SBFile.Create(f, borrow=True)
+            def i(sbf):
+                for i in range(10):
+                    f = sbf.GetFile()
+                    yield f
+                    sbf = lldb.SBFile.Create(f, borrow=True)
+                    yield sbf
+                    sbf.Write(str(i).encode('ascii') + b"\n")
+            files = list(i(sbf))
+        with open(self.out_filename, 'r') as f:
+            self.assertEqual(list(range(10)), list(map(int, f.read().strip().split())))
+