Commit 7b585bae authored by Emilio Cobos Álvarez's avatar Emilio Cobos Álvarez
Browse files

Bug 1789439 - Don't allow reentrant programmatic print calls. r=smaug,peterv a=pascalc 

Differential Revision: https://phabricator.services.mozilla.com/D156682
parent 913a8d68

dom/base/nsGlobalWindowOuter.cpp

+5 −2
Original line number Diff line number Diff line
@@ -5132,14 +5132,17 @@ void nsGlobalWindowOuter::PrintOuter(ErrorResult& aError) { 
#ifdef NS_PRINTING

  RefPtr<BrowsingContext> top =

      mBrowsingContext ? mBrowsingContext->Top() : nullptr;

  bool oldIsPrinting = top && top->GetIsPrinting();

  if (NS_WARN_IF(top && top->GetIsPrinting())) {

    return;

  }



  if (top) {

    Unused << top->SetIsPrinting(true);

  }



  auto unset = MakeScopeExit([&] {

    if (top) {

      Unused << top->SetIsPrinting(oldIsPrinting);

      Unused << top->SetIsPrinting(false);

    }

  });