Add ActivationFrame_GetFramePointer method and test.

runtime/vm/debugger_api_impl_test.cc

 // Copyright (c) 2012, 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 "include/dart_debugger_api.h"
 #include "include/dart_mirrors_api.h"
 #include "platform/assert.h"
 #include "vm/dart_api_impl.h"
 #include "vm/lockers.h"
 #include "vm/unit_test.h"
@@ skipping 253 matching lines @@
 
 
 static void VerifyStackTrace(Dart_StackTrace trace,
                              const char* func_names[],
                              Dart_Handle local_vars[],
                              int expected_frames,
                              bool skip_null_expects) {
   intptr_t trace_len;
   Dart_Handle res = Dart_StackTraceLength(trace, &trace_len);
   EXPECT_TRUE(res);
+  uintptr_t last_frame_pointer = 0;
+  uintptr_t frame_pointer;
   for (int i = 0; i < trace_len; i++) {
     Dart_ActivationFrame frame;
     res = Dart_GetActivationFrame(trace, i, &frame);
     EXPECT_TRUE(res);
+
+    res = Dart_ActivationFrameGetFramePointer(frame, &frame_pointer);
+    EXPECT_TRUE(res);
+    if (i > 0) {
+      // We expect the stack to grow from high to low addresses.
+      EXPECT_GT(frame_pointer, last_frame_pointer);
+    }
+    last_frame_pointer = frame_pointer;
     if (i < expected_frames) {
       VerifyStackFrame(frame, func_names[i], local_vars[i], skip_null_expects);
     } else {
       VerifyStackFrame(frame, NULL, Dart_Null(), skip_null_expects);
     }
   }
 }
 
 
 // TODO(hausner): Convert this one remaining use of the legacy
@@ skipping 2017 matching lines @@
       " null, 3, 7, 1, 8, 6, 9, 10, 10, 11, 11, 13,"
       " null, 4, 13, 3, 14, 10,"
       " null, 5, 17, 5, 18, 9, 19, 12,"
       " null, 6, 21, 1,"
       " null, 8, 24, 1, 25, 5, 26, 6, 27, 8,"
       " null, 9, 29, 1]",
       tokens_cstr);
 }
 
 }  // namespace dart