Adding a test case for the changes made to ValueObjects to use iteration instead of recursion for navigating to their root - beware: a regression here will most probably cause a crash instead of a failure

llvm-svn: 179863

lldb/test/functionalities/recursion/Makefile

@@ -0,0 +1,5 @@
+LEVEL = ../../make
+
+CXX_SOURCES := main.cpp
+
+include $(LEVEL)/Makefile.rules

lldb/test/functionalities/recursion/TestValueObjectRecursion.py

@@ -0,0 +1,74 @@
+"""
+Test lldb data formatter subsystem.
+"""
+
+import os, time
+import unittest2
+import lldb
+from lldbtest import *
+import lldbutil
+
+class ValueObjectRecursionTestCase(TestBase):
+
+    mydir = os.path.join("functionalities", "recursion")
+
+    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
+    @dsym_test
+    def test_with_dsym_and_run_command(self):
+        """Test that deeply nested ValueObjects still work."""
+        self.buildDsym()
+        self.recursive_vo_commands()
+
+    @dwarf_test
+    def test_with_dwarf_and_run_command(self):
+        """Test that deeply nested ValueObjects still work."""
+        self.buildDwarf()
+        self.recursive_vo_commands()
+
+    def setUp(self):
+        # Call super's setUp().
+        TestBase.setUp(self)
+        # Find the line number to break at.
+        self.line = line_number('main.cpp', '// Set break point at this line.')
+
+    def recursive_vo_commands(self):
+        """Test that that file and class static variables display correctly."""
+        self.runCmd("file a.out", CURRENT_EXECUTABLE_SET)
+
+        lldbutil.run_break_set_by_file_and_line (self, "main.cpp", self.line, num_expected_locations=1, loc_exact=True)
+
+        self.runCmd("run", RUN_SUCCEEDED)
+
+        # The stop reason of the thread should be breakpoint.
+        self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
+            substrs = ['stopped',
+                       'stop reason = breakpoint'])
+
+        # This is the function to remove the custom formats in order to have a
+        # clean slate for the next test case.
+        def cleanup():
+            self.runCmd('type format clear', check=False)
+            self.runCmd('type summary clear', check=False)
+
+        # Execute the cleanup function during test case tear down.
+        self.addTearDownHook(cleanup)
+
+        root = self.frame().FindVariable("root")
+        child = root.GetChildAtIndex(1)
+        if self.TraceOn():
+             print root
+             print child
+        for i in range(0,24500):
+             child = child.GetChildAtIndex(1)
+        if self.TraceOn():
+             print child
+        self.assertTrue(child.IsValid(),"could not retrieve the deep ValueObject")
+        self.assertTrue(child.GetChildAtIndex(0).IsValid(),"the deep ValueObject has no value")
+        self.assertTrue(child.GetChildAtIndex(0).GetValueAsUnsigned() != 0,"the deep ValueObject has a zero value")
+        self.assertTrue(child.GetChildAtIndex(1).GetValueAsUnsigned() != 0, "the deep ValueObject has no next")
+
+if __name__ == '__main__':
+    import atexit
+    lldb.SBDebugger.Initialize()
+    atexit.register(lambda: lldb.SBDebugger.Terminate())
+    unittest2.main()

lldb/test/functionalities/recursion/main.cpp

@@ -0,0 +1,41 @@
+//===-- main.cpp ------------------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+struct node;
+struct node {
+	int value;
+	node* next;
+	node () : value(1),next(NULL) {}
+	node (int v) : value(v), next(NULL) {}
+};
+
+void make_tree(node* root, int count)
+{
+	int countdown=1;
+	if (!root)
+		return;
+	root->value = countdown;
+	while (count > 0)
+	{
+		root->next = new node(++countdown);
+		root = root->next;
+		count--;
+	}
+}
+
+int main (int argc, const char * argv[])
+{
+	node root(1);
+	make_tree(&root,25000);
+	return 0; // Set break point at this line.
+}