VM service: List all instances of a class.

runtime/vm/service_test.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
 
 #include "include/dart_debugger_api.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
 #include "vm/debugger.h"
@@ skipping 818 matching lines @@
   EXPECT(!class_b.IsNull());
   const Instance& b0 = Instance::Handle(Instance::New(class_b));
   const Instance& b1 = Instance::Handle(Instance::New(class_b));
   service_msg = EvalF(h_lib, "[0, port, ['classes', '%" Pd "', 'retained'],"
                       "[], []]", class_b.id());
   Service::HandleIsolateMessage(isolate, service_msg);
   handler.HandleNextMessage();
   ExpectSubstringF(handler.msg(),
                    "\"id\":\"objects\\/int-%" Pd "\"",
                    b0.raw()->Size() + b1.raw()->Size());
+  // ... and list the instances of class B.
+  service_msg = EvalF(h_lib, "[0, port, ['classes', '%" Pd "', 'instances'],"
+                      "['limit'], ['3']]", class_b.id());
+  Service::HandleIsolateMessage(isolate, service_msg);
+  handler.HandleNextMessage();
+  ExpectSubstringF(handler.msg(), "\"type\":\"@Array\"");
+  // TODO(koda): Actually parse the response.
+  static const intptr_t kInstanceListId = 0;
+  ExpectSubstringF(handler.msg(), "\"id\":\"objects\\/%" Pd "\",\"length\":2",
+                   kInstanceListId);
+  Array& list = Array::Handle();
+  list ^= isolate->object_id_ring()->GetObjectForId(kInstanceListId);
+  EXPECT_EQ(2, list.Length());

[Cutch, 2014/06/18 17:23:07]

Might be good idea to have a test which verifies that limit does truncate the
list (i.e. live instances > limit).

[koda, 2014/06/18 20:55:32]

Done.

+  // The list should contain {b0, b1}.
+  EXPECT((list.At(0) == b0.raw() && list.At(1) == b1.raw()) ||
+         (list.At(0) == b1.raw() && list.At(1) == b0.raw()));
 }
 
 
 TEST_CASE(Service_Types) {
   const char* kScript =
       "var port;\n"  // Set to our mock port by C++.
       "\n"
       "class A<T> { }\n"
       "\n"
       "main() {\n"
@@ skipping 660 matching lines @@
   service_msg = Eval(h_lib, "[0, port, ['profile'], ['tags'], ['hidden']]");
   Service::HandleIsolateMessage(isolate, service_msg);
   handler.HandleNextMessage();
   // Expect error.
   EXPECT_SUBSTRING("\"type\":\"Error\"", handler.msg());
 }
 
 #endif  // !defined(TARGET_ARCH_ARM64)
 
 }  // namespace dart