[Lldb-commits] [PATCH] D48303: Don't take the address of an xvalue when printing an expr result

[Raphael Isemann via Phabricator via lldb-commits]

teemperor updated this revision to Diff 151827.
teemperor added a comment.

- Added test case


https://reviews.llvm.org/D48303

Files:
  packages/Python/lldbsuite/test/expression_command/xvalue/Makefile
  packages/Python/lldbsuite/test/expression_command/xvalue/TestXValuePrinting.py
  packages/Python/lldbsuite/test/expression_command/xvalue/main.cpp
  source/Plugins/ExpressionParser/Clang/ASTResultSynthesizer.cpp


Index: source/Plugins/ExpressionParser/Clang/ASTResultSynthesizer.cpp
===================================================================
--- source/Plugins/ExpressionParser/Clang/ASTResultSynthesizer.cpp
+++ source/Plugins/ExpressionParser/Clang/ASTResultSynthesizer.cpp
@@ -292,8 +292,7 @@
   //
   //   - During dematerialization, $0 is ignored.
 
-  bool is_lvalue = (last_expr->getValueKind() == VK_LValue ||
-                    last_expr->getValueKind() == VK_XValue) &&
+  bool is_lvalue = (last_expr->getValueKind() == VK_LValue) &&
                    (last_expr->getObjectKind() == OK_Ordinary);
 
   QualType expr_qual_type = last_expr->getType();
Index: packages/Python/lldbsuite/test/expression_command/xvalue/main.cpp
===================================================================
--- /dev/null
+++ packages/Python/lldbsuite/test/expression_command/xvalue/main.cpp
@@ -0,0 +1,14 @@
+#include <stddef.h>
+
+struct StringRef
+{
+  const char *data = 0;
+};
+
+StringRef foo() { return StringRef(); }
+
+int main(int argc, char const *argv[])
+{
+  const char *something = foo().data;
+  return 0; // Break here
+}
Index: packages/Python/lldbsuite/test/expression_command/xvalue/TestXValuePrinting.py
===================================================================
--- /dev/null
+++ packages/Python/lldbsuite/test/expression_command/xvalue/TestXValuePrinting.py
@@ -0,0 +1,37 @@
+from __future__ import print_function
+
+
+import lldb
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+
+class ExprXValuePrintingTestCase(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    def setUp(self):
+        # Call super's setUp().
+        TestBase.setUp(self)
+
+        self.main_source = "main.cpp"
+        self.main_source_spec = lldb.SBFileSpec(self.main_source)
+
+    def do_test(self, dictionary=None):
+        """Printing an xvalue should work."""
+        self.build(dictionary=dictionary)
+
+        (target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(self, 
+                                          '// Break here', self.main_source_spec)
+        frame = thread.GetFrameAtIndex(0)
+
+        value = frame.EvaluateExpression("foo().data")
+        self.assertTrue(value.IsValid())
+        self.assertTrue(value.GetError().Success())
+        self.assertEqual(value.GetValueAsUnsigned(), 0)
+
+    @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr21765")
+    def test(self):
+        self.do_test()
+
Index: packages/Python/lldbsuite/test/expression_command/xvalue/Makefile
===================================================================
--- /dev/null
+++ packages/Python/lldbsuite/test/expression_command/xvalue/Makefile
@@ -0,0 +1,5 @@
+LEVEL = ../../make
+
+CXX_SOURCES := main.cpp
+
+include $(LEVEL)/Makefile.rules


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