1 files changed, 57 insertions, 0 deletions
diff --git a/packages/Python/lldbsuite/test/python_api/process/read-mem-cstring/TestReadMemCString.py b/packages/Python/lldbsuite/test/python_api/process/read-mem-cstring/TestReadMemCString.py
new file mode 100644
index 000000000000..6302711606c5
--- /dev/null
+++ b/packages/Python/lldbsuite/test/python_api/process/read-mem-cstring/TestReadMemCString.py
@@ -0,0 +1,57 @@
+"""Test reading c-strings from memory via SB API."""
+
+from __future__ import print_function
+
+import os
+import lldb
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+
+class TestReadMemCString(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+    NO_DEBUG_INFO_TESTCASE = True
+
+    def test_read_memory_c_string(self):
+        """Test corner case behavior of SBProcess::ReadCStringFromMemory"""
+        self.build()
+	self.dbg.SetAsync(False)
+
+        self.main_source = "main.c"
+	self.main_source_spec = lldb.SBFileSpec(self.main_source)
+	self.exe = os.path.join(os.getcwd(), "read-mem-cstring")
+
+        (target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(
+            self, 'breakpoint here', self.main_source_spec, None, self.exe)
+
+	frame = thread.GetFrameAtIndex(0)
+        
+        err = lldb.SBError()
+
+        empty_str_addr = frame.FindVariable("empty_string").GetValueAsUnsigned(err)
+        self.assertTrue(err.Success())
+        self.assertTrue(empty_str_addr != lldb.LLDB_INVALID_ADDRESS)
+
+        one_letter_str_addr = frame.FindVariable("one_letter_string").GetValueAsUnsigned(err)
+        self.assertTrue(err.Success())
+        self.assertTrue(one_letter_str_addr != lldb.LLDB_INVALID_ADDRESS)
+
+        invalid_memory_str_addr = frame.FindVariable("invalid_memory_string").GetValueAsUnsigned(err)
+        self.assertTrue(err.Success())
+        self.assertTrue(invalid_memory_str_addr != lldb.LLDB_INVALID_ADDRESS)
+
+        # Important:  An empty (0-length) c-string must come back as a Python string, not a
+        # None object.
+        empty_str = process.ReadCStringFromMemory(empty_str_addr, 2048, err)
+        self.assertTrue(err.Success())
+        self.assertTrue(empty_str == "")
+
+        one_letter_string = process.ReadCStringFromMemory(one_letter_str_addr, 2048, err)
+        self.assertTrue(err.Success())
+        self.assertTrue(one_letter_string == "1")
+
+        invalid_memory_string = process.ReadCStringFromMemory(invalid_memory_str_addr, 2048, err)
+        self.assertTrue(err.Fail())
+        self.assertTrue(invalid_memory_string == "" or invalid_memory_string == None)