Cleanup the way the debugger stores live registers when entering at a break...

test/cctest/test-debug.cc

 // Copyright 2007-2008 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 851 matching lines @@
 
   // Perform a garbage collection when break point is hit and continue. Based
   // on the number of break points hit either scavenge or mark compact
   // collector is used.
   if (event == v8::Break) {
     break_point_hit_count++;
     if (break_point_hit_count % 2 == 0) {
       // Scavenge.
       Heap::CollectGarbage(0, v8::internal::NEW_SPACE);
     } else {
-      // Mark sweep (and perhaps compact).
+      // Mark sweep compact.
       Heap::CollectAllGarbage(true);
     }
   }
 }
 
 
 // Debug event handler which re-issues a debug break and calls the garbage
 // collector to have the heap verified.
 static void DebugEventBreak(v8::DebugEvent event,
                             v8::Handle<v8::Object> exec_state,
@@ skipping 287 matching lines @@
   // Run without breakpoints.
   ClearBreakPoint(bp);
   foo->Call(env->Global(), 0, NULL);
   CHECK_EQ(2, break_point_hit_count);
 
   v8::Debug::SetDebugEventListener(NULL);
   CheckDebuggerUnloaded();
 }
 
 
+// Test that a break point can be set at an IC call location and survive a GC.
+TEST(BreakPointConstructCallWithGC) {
+  break_point_hit_count = 0;
+  v8::HandleScope scope;
+  DebugLocalContext env;
+  v8::Debug::SetDebugEventListener(DebugEventBreakPointCollectGarbage,
+                                   v8::Undefined());
+  v8::Script::Compile(v8::String::New("function bar(){ this.x = 1;}"))->Run();
+  v8::Script::Compile(v8::String::New(
+      "function foo(){return new bar(1).x;}"))->Run();
+  v8::Local<v8::Function> foo =
+      v8::Local<v8::Function>::Cast(env->Global()->Get(v8::String::New("foo")));
+
+  // Run without breakpoints.
+  CHECK_EQ(1, foo->Call(env->Global(), 0, NULL)->Int32Value());
+  CHECK_EQ(0, break_point_hit_count);
+
+  // Run with breakpoint.
+  int bp = SetBreakPoint(foo, 0);
+  CHECK_EQ(1, foo->Call(env->Global(), 0, NULL)->Int32Value());
+  CHECK_EQ(1, break_point_hit_count);
+  CHECK_EQ(1, foo->Call(env->Global(), 0, NULL)->Int32Value());
+  CHECK_EQ(2, break_point_hit_count);
+
+  // Run without breakpoints.
+  ClearBreakPoint(bp);
+  foo->Call(env->Global(), 0, NULL);
+  CHECK_EQ(2, break_point_hit_count);
+
+  v8::Debug::SetDebugEventListener(NULL);
+  CheckDebuggerUnloaded();
+}
+
+
 // Test that a break point can be set at a return store location.
 TEST(BreakPointReturn) {
   break_point_hit_count = 0;
   v8::HandleScope scope;
   DebugLocalContext env;
 
   // Create a functions for checking the source line and column when hitting
   // a break point.
   frame_source_line = CompileFunction(&env,
                                       frame_source_line_source,
@@ skipping 5647 matching lines @@
 
   CHECK_EQ(2, TestClientData::constructor_call_counter);
   CHECK_EQ(TestClientData::constructor_call_counter,
            TestClientData::destructor_call_counter);
 
   v8::Debug::SetDebugEventListener(NULL);
   CheckDebuggerUnloaded();
 }
 
 #endif  // ENABLE_DEBUGGER_SUPPORT