[libclang] The annotation of tokens operation visits statement nodes code-recursively.

This can blow the stack with extremely deep hierarchies. Switch it to data-recursive.

This is implemented by introducing a post-children visitation callback that the
CursorVisitor is calling after child nodes of a cursor have been visited.
This is used by the annotate-tokens visitor to do extra work at that point.

rdar://11979525.

llvm-svn: 163071

1 files changed, 95 insertions, 0 deletions

diff --git a/clang/test/Index/annotate-deep-statements.cpp b/clang/test/Index/annotate-deep-statements.cpp
new file mode 100644
index 00000000000..32a48b7d6ab
--- /dev/null
+++ b/clang/test/Index/annotate-deep-statements.cpp
@@ -0,0 +1,95 @@
+// RUN: c-index-test -test-annotate-tokens=%s:1:1:1000:1 %s | FileCheck %s
+
+// rdar://11979525
+// Check that we don't get stack overflow trying to annotate an extremely deep AST.
+
+struct S {
+  S &operator()();
+};
+
+// CHECK: Identifier: "foo" [11:6 - 11:9] FunctionDecl=foo:11:6 (Definition)
+void foo() {
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+    ;
+}