Fix a bug when top level break points fall into the last function in script.

Review URL: http://codereview.chromium.org/2824007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4890 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/runtime.cc

@@ -9081,8 +9081,6 @@ Object* Runtime::FindSharedFunctionInfoInScript(Handle<Script> script,
   // The current candidate for the source position:
   int target_start_position = RelocInfo::kNoPosition;
   Handle<SharedFunctionInfo> target;
-  // The current candidate for the last function in script:
-  Handle<SharedFunctionInfo> last;
   while (!done) {
     HeapIterator iterator;
     for (HeapObject* obj = iterator.next();
@@ -9123,25 +9121,12 @@ Object* Runtime::FindSharedFunctionInfoInScript(Handle<Script> script,
               }
             }
           }
-
-          // Keep track of the last function in the script.
-          if (last.is_null() ||
-              shared->end_position() > last->start_position()) {
-            last = shared;
-          }
         }
       }
     }
 
-    // Make sure some candidate is selected.
     if (target.is_null()) {
-      if (!last.is_null()) {
-        // Position after the last function - use last.
-        target = last;
-      } else {
-        // Unable to find function - possibly script without any function.
-        return Heap::undefined_value();
-      }
+      return Heap::undefined_value();
     }
 
     // If the candidate found is compiled we are done. NOTE: when lazy

test/cctest/test-debug.cc

@@ -2028,6 +2028,51 @@ TEST(ScriptBreakPointLine) {
 }
 
 
+// Test top level script break points set on lines.
+TEST(ScriptBreakPointLineTopLevel) {
+  v8::HandleScope scope;
+  DebugLocalContext env;
+  env.ExposeDebug();
+
+  v8::Debug::SetDebugEventListener(DebugEventBreakPointHitCount,
+                                   v8::Undefined());
+
+  v8::Local<v8::String> script = v8::String::New(
+    "function f() {\n"
+    "  a = 1;                   // line 1\n"
+    "}\n"
+    "a = 2;                     // line 3\n");
+  v8::Local<v8::Function> f;
+  {
+    v8::HandleScope scope;
+    v8::Script::Compile(script, v8::String::New("test.html"))->Run();
+  }
+  f = v8::Local<v8::Function>::Cast(env->Global()->Get(v8::String::New("f")));
+
+  Heap::CollectAllGarbage(false);
+
+  SetScriptBreakPointByNameFromJS("test.html", 3, -1);
+
+  // Call f and check that there was no break points.
+  break_point_hit_count = 0;
+  f->Call(env->Global(), 0, NULL);
+  CHECK_EQ(0, break_point_hit_count);
+
+  // Recompile and run script and check that break point was hit.
+  break_point_hit_count = 0;
+  v8::Script::Compile(script, v8::String::New("test.html"))->Run();
+  CHECK_EQ(1, break_point_hit_count);
+
+  // Call f and check that there are still no break points.
+  break_point_hit_count = 0;
+  f = v8::Local<v8::Function>::Cast(env->Global()->Get(v8::String::New("f")));
+  CHECK_EQ(0, break_point_hit_count);
+
+  v8::Debug::SetDebugEventListener(NULL);
+  CheckDebuggerUnloaded();
+}
+
+
 // Test that it is possible to remove the last break point for a function
 // inside the break handling of that break point.
 TEST(RemoveBreakPointInBreak) {

test/mjsunit/debug-setbreakpoint.js

@@ -116,7 +116,7 @@ function listener(event, exec_state, event_data, data) {
     mirror = debug.MakeMirror(o.a);
     testArguments(dcp, '{"type":"handle","target":' + mirror.handle() + '}', true, false);
 
-    testArguments(dcp, '{"type":"script","target":"sourceUrlScript","line":1}', true, true);
+    testArguments(dcp, '{"type":"script","target":"sourceUrlScript","line":0}', true, true);
 
     // Indicate that all was processed.
     listenerComplete = true;