tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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RefCountedCopyConstructorChecker.cpp (1427B)

      1 /* This Source Code Form is subject to the terms of the Mozilla Public
      2 * License, v. 2.0. If a copy of the MPL was not distributed with this
      3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      4 
      5 #include "RefCountedCopyConstructorChecker.h"
      6 #include "CustomMatchers.h"
      7 
      8 void RefCountedCopyConstructorChecker::registerMatchers(
      9    MatchFinder *AstMatcher) {
     10  AstMatcher->addMatcher(
     11      cxxConstructExpr(
     12          hasDeclaration(cxxConstructorDecl(isCompilerProvidedCopyConstructor(),
     13                                            ofClass(hasRefCntMember()))))
     14          .bind("node"),
     15      this);
     16 }
     17 
     18 void RefCountedCopyConstructorChecker::check(
     19    const MatchFinder::MatchResult &Result) {
     20  const char *Error =
     21      "Invalid use of compiler-provided copy constructor on refcounted type";
     22  const char *Note = "The default copy constructor also copies the "
     23                     "default mRefCnt property, leading to reference "
     24                     "count imbalance issues. Please provide your own "
     25                     "copy constructor which only copies the fields which "
     26                     "need to be copied";
     27 
     28  // Everything we needed to know was checked in the matcher - we just report
     29  // the error here
     30  const CXXConstructExpr *E = Result.Nodes.getNodeAs<CXXConstructExpr>("node");
     31 
     32  diag(E->getLocation(), Error, DiagnosticIDs::Error);
     33  diag(E->getLocation(), Note, DiagnosticIDs::Note);
     34 }