[lldb][test] Add test for ASTImporter's name conflict resolution

lldb/test/Shell/Expr/Inputs/name-conflict-test/main.cpp

@@ -0,0 +1,21 @@
+#include "service.h"
+#include <cassert>
+#include <dlfcn.h>
+
+#ifndef PLUGIN_PATH
+#error "Expected PLUGIN_PATH to be defined"
+#endif // !PLUGIN_PATH
+
+int main() {
+  void *handle = dlopen(PLUGIN_PATH, RTLD_NOW);
+  assert(handle != nullptr);
+  void (*plugin_init)(void) = (void (*)(void))dlsym(handle, "plugin_init");
+  assert(plugin_init != nullptr);
+  void (*plugin_entry)(void) = (void (*)(void))dlsym(handle, "plugin_entry");
+  assert(plugin_entry != nullptr);
+
+  exported();
+  plugin_init();
+  plugin_entry();
+  return 0;
+}

lldb/test/Shell/Expr/Inputs/name-conflict-test/plugin.cpp

@@ -0,0 +1,14 @@
+#include "plugin.h"
+#include "service.h"
+
+struct Proxy : public Service {
+  State *proxyState;
+};
+
+Proxy *gProxyThis = 0;
+
+extern "C" {
+void plugin_init() { gProxyThis = new Proxy; }
+
+void plugin_entry() {}
+}

lldb/test/Shell/Expr/Inputs/name-conflict-test/plugin.h

@@ -0,0 +1,9 @@
+#ifndef PLUGIN_H_IN
+#define PLUGIN_H_IN
+
+extern "C" {
+void plugin_entry(void);
+void plugin_init(void);
+}
+
+#endif // _H_IN

lldb/test/Shell/Expr/Inputs/name-conflict-test/service.cpp

@@ -0,0 +1,14 @@
+#include "service.h"
+
+struct ServiceAux {
+  Service *Owner;
+};
+
+struct Service::State {};
+
+void exported() {
+  // Make sure debug-info for definition of Service is
+  // emitted in this CU.
+  Service service;
+  service.start(0);
+}

lldb/test/Shell/Expr/Inputs/name-conflict-test/service.h

@@ -0,0 +1,20 @@
+#ifndef SERVICE_H_IN
+#define SERVICE_H_IN
+
+struct ServiceAux;
+
+struct Service {
+  struct State;
+  bool start(State *) { return true; }
+
+#if HIDE_FROM_PLUGIN
+  int __resv1;
+#endif // !HIDE_FROM_PLUGIN
+
+  Service *__owner;
+  ServiceAux *aux;
+};
+
+void exported();
+
+#endif

lldb/test/Shell/Expr/TestODRHandlingWithDylib.test

@@ -0,0 +1,17 @@
+# REQUIRES: system-darwin
+
+# RUN: %clangxx_host %p/Inputs/name-conflict-test/plugin.cpp -shared -gdwarf -O0 -o %t.plugin.dylib
+#
+# RUN: %clangxx_host %p/Inputs/name-conflict-test/main.cpp \
+# RUN:               %p/Inputs/name-conflict-test/service.cpp \
+# RUN:               -DPLUGIN_PATH=\"%t.plugin.dylib\" \
+# RUN:               -DHIDE_FROM_PLUGIN \
+# RUN:               -gdwarf -O0 -o %t.a.out
+#
+# RUN: %lldb %t.a.out \
+# RUN:     -o "b plugin_entry" \
+# RUN:     -o run \
+# RUN:     -o "expr *gProxyThis" \
+# RUN:     -o exit | FileCheck  %s
+
+# CHECK: (lldb) expr *gProxyThis