Add function for one-time stop at function entry

runtime/vm/debugger_api_impl.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 "vm/dart_api_impl.h"
 #include "vm/dart_api_state.h"
 #include "vm/debugger.h"
 #include "vm/isolate.h"
@@ skipping 343 matching lines @@
     const char* target_name = Debugger::QualifiedFunctionName(bp_target);
     result = Api::NewError("%s: no breakpoint location found in '%s'",
                              CURRENT_FUNC, target_name);
   } else {
     *breakpoint = reinterpret_cast<Dart_Breakpoint>(bpt);
   }
   return result;
 }
 
 
+DART_EXPORT Dart_Handle Dart_OneTimeBreakAtEntry(
+                            Dart_Handle library_in,
+                            Dart_Handle class_name_in,
+                            Dart_Handle function_name_in) {
+  Isolate* isolate = Isolate::Current();
+  DARTSCOPE(isolate);
+  UNWRAP_AND_CHECK_PARAM(Library, library, library_in);
+  UNWRAP_AND_CHECK_PARAM(String, class_name, class_name_in);
+  UNWRAP_AND_CHECK_PARAM(String, function_name, function_name_in);
+
+  const char* msg = CheckIsolateState(isolate);
+  if (msg != NULL) {
+    return Api::NewError("%s", msg);
+  }
+
+  // Resolve the breakpoint target function.
+  Debugger* debugger = isolate->debugger();
+  const Function& bp_target = Function::Handle(
+      debugger->ResolveFunction(library, class_name, function_name));
+  if (bp_target.IsNull()) {
+    const bool toplevel = class_name.Length() == 0;
+    return Api::NewError("%s: could not find function '%s%s%s'",
+                         CURRENT_FUNC,
+                         toplevel ? "" : class_name.ToCString(),
+                         toplevel ? "" : ".",
+                         function_name.ToCString());
+  }
+
+  debugger->OneTimeBreakAtEntry(bp_target);
+  return Api::True(isolate);
+}
+
+
+
+
+
 DART_EXPORT Dart_Handle Dart_RemoveBreakpoint(intptr_t bp_id) {
   Isolate* isolate = Isolate::Current();
   DARTSCOPE(isolate);
   Debugger* debugger = isolate->debugger();
   ASSERT(debugger != NULL);
 
   isolate->debugger()->RemoveBreakpoint(bp_id);
   return Api::True(isolate);
 }
 
@@ skipping 335 matching lines @@
   return Api::True(isolate);
 }
 
 
 DART_EXPORT Dart_Isolate Dart_GetIsolate(Dart_IsolateId isolate_id) {
   Isolate* isolate = PortMap::GetIsolate(isolate_id);
   return Api::CastIsolate(isolate);
 }
 
 }  // namespace dart