Store frame pointers

test/cctest/test-debug.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 7171 matching lines @@
 
   int break_id = CcTest::i_isolate()->debug()->break_id();
   char script[128];
   i::Vector<char> script_vector(script, sizeof(script));
   SNPrintF(script_vector, "%%GetFrameCount(%d)", break_id);
   v8::Local<v8::Value> result = CompileRun(script);
 
   int frame_count = result->Int32Value();
   CHECK_EQ(expected_frame_count, frame_count);
 
+  uint32_t last_frame_pointer_high;
+  uint32_t last_frame_pointer_low;
   for (int i = 0; i < frame_count; i++) {
     // The 5. element in the returned array of GetFrameDetails contains the
     // source position of that frame.
     SNPrintF(script_vector, "%%GetFrameDetails(%d, %d)[5]", break_id, i);
     v8::Local<v8::Value> result = CompileRun(script);
     CHECK_EQ(expected_line_number[i],
              i::Script::GetLineNumber(source_script, result->Int32Value()));
+
+    // The 8. element in the returned array of GetFrameDetails contains the
+    // high address of the frame pointer.
+    SNPrintF(script_vector, "%%GetFrameDetails(%d, %d)[8]", break_id, i);
+    uint32_t frame_pointer_high = CompileRun(script)->Uint32Value();
+
+    // The 9. element in the returned array of GetFrameDetails contains the
+    // low address of the frame pointer.
+    SNPrintF(script_vector, "%%GetFrameDetails(%d, %d)[9]", break_id, i);
+    uint32_t frame_pointer_low = CompileRun(script)->Uint32Value();
+
+    if (i > 0) {
+      // We expect the stack to grow from high to low addresses.
+      CHECK(last_frame_pointer_high < frame_pointer_high ||
+            last_frame_pointer_low <= frame_pointer_low);
+    }
+    last_frame_pointer_high = frame_pointer_high;
+    last_frame_pointer_low = frame_pointer_low;
   }
   v8::Debug::SetDebugEventListener(NULL);
   v8::V8::TerminateExecution(CcTest::isolate());
 }
 
 
 TEST(DebugBreakInline) {
   i::FLAG_allow_natives_syntax = true;
   DebugLocalContext env;
   v8::HandleScope scope(env->GetIsolate());
@@ skipping 206 matching lines @@
   v8::Isolate* isolate = env->GetIsolate();
   v8::HandleScope scope(isolate);
   v8::Debug::SetDebugEventListener(DebugBreakTriggerTerminate);
   TerminationThread terminator(isolate);
   terminator.Start();
   v8::TryCatch try_catch;
   v8::Debug::DebugBreak(isolate);
   CompileRun("while (true);");
   CHECK(try_catch.HasTerminated());
 }