[inspector] use debuggerContext as current in getPossibleBreakpoints

src/inspector/v8-debugger-agent-impl.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/inspector/v8-debugger-agent-impl.h"
 
 #include <algorithm>
 
 #include "src/debug/debug-interface.h"
 #include "src/inspector/injected-script.h"
@@ skipping 337 matching lines @@
   }
   m_breakpointIdToDebuggerBreakpointIds.erase(breakpointId);
 }
 
 Response V8DebuggerAgentImpl::getPossibleBreakpoints(
     std::unique_ptr<protocol::Debugger::Location> start,
     Maybe<protocol::Debugger::Location> end,
     std::unique_ptr<protocol::Array<protocol::Debugger::Location>>* locations) {
   String16 scriptId = start->getScriptId();
 
-  if (start->getLineNumber() < 0 || start->getColumnNumber(0) < 0)
+  if (start->getLineNumber() < 0 || start->getColumnNumber(0) < 0) {
     return Response::Error(
         "start.lineNumber and start.columnNumber should be >= 0");
+  }
 
   v8::DebugInterface::Location v8Start(start->getLineNumber(),
                                        start->getColumnNumber(0));
   v8::DebugInterface::Location v8End;
   if (end.isJust()) {
     if (end.fromJust()->getScriptId() != scriptId)
       return Response::Error("Locations should contain the same scriptId");
     int line = end.fromJust()->getLineNumber();
     int column = end.fromJust()->getColumnNumber(0);
     if (line < 0 || column < 0)
       return Response::Error(
           "end.lineNumber and end.columnNumber should be >= 0");
     v8End = v8::DebugInterface::Location(line, column);
   }
   auto it = m_scripts.find(scriptId);
   if (it == m_scripts.end()) return Response::Error("Script not found");
 
+  v8::HandleScope handleScope(m_isolate);
+  v8::Context::Scope scope(v8::DebugInterface::GetDebugContext(m_isolate));
+
   std::vector<v8::DebugInterface::Location> v8Locations;
   if (!it->second->getPossibleBreakpoints(v8Start, v8End, &v8Locations))
     return Response::InternalError();
 
   *locations = protocol::Array<protocol::Debugger::Location>::create();
   for (size_t i = 0; i < v8Locations.size(); ++i) {
     (*locations)
         ->addItem(protocol::Debugger::Location::create()
                       .setScriptId(scriptId)
                       .setLineNumber(v8Locations[i].GetLineNumber())
@@ skipping 830 matching lines @@
 
 void V8DebuggerAgentImpl::reset() {
   if (!enabled()) return;
   m_scheduledDebuggerStep = NoStep;
   m_scripts.clear();
   m_blackboxedPositions.clear();
   m_breakpointIdToDebuggerBreakpointIds.clear();
 }
 
 }  // namespace v8_inspector