Don't access the process in expressions w/o checking that

the process exists.

I also added some tests that crash before this fix, and work correctly after.

<rdar://problem/29083321>

llvm-svn: 285974

1 files changed, 27 insertions, 0 deletions

diff --git a/lldb/packages/Python/lldbsuite/test/expression_command/calculator_mode/TestCalculatorMode.py b/lldb/packages/Python/lldbsuite/test/expression_command/calculator_mode/TestCalculatorMode.py
new file mode 100644
index 00000000000..46ea111bf03
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/expression_command/calculator_mode/TestCalculatorMode.py
@@ -0,0 +1,27 @@
+"""
+Test calling an expression without a target.
+"""
+
+from __future__ import print_function
+
+
+import lldb
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+
+class TestCalculatorMode(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    def setUp(self):
+        # Call super's setUp().
+        TestBase.setUp(self)
+
+    def test__calculator_mode(self):
+        """Test calling expressions in the dummy target."""
+        self.expect("expression 11 + 22", "11 + 22 didn't get the expected result", substrs=["33"])
+        # Now try it with a specific language:
+        self.expect("expression -l c -- 11 + 22", "11 + 22 didn't get the expected result", substrs=["33"])
+