LoadLibraryUsageChecker.cpp

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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "LoadLibraryUsageChecker.h"

#include "CustomMatchers.h"

// On MacOS the filesystem is UTF-8, on linux the canonical filename is 8-bit

// string. On Windows data loss conversion will occur. This checker restricts

// the use of ASCII file functions for loading libraries.

void LoadLibraryUsageChecker::registerMatchers(MatchFinder *AstMatcher) {

  AstMatcher->addMatcher(

      callExpr(

          allOf(isFirstParty(),

                callee(functionDecl(anyOf(

                    allOf(isInSystemHeader(), anyOf(hasName("LoadLibraryA"),

                                                    hasName("LoadLibraryExA"))),

                    hasName("PR_LoadLibrary")))),

                unless(hasArgument(0, stringLiteral()))))

          .bind("funcCall"),

      this);

void LoadLibraryUsageChecker::check(const MatchFinder::MatchResult &Result) {

  const CallExpr *FuncCall = Result.Nodes.getNodeAs<CallExpr>("funcCall");

  if (FuncCall) {

    diag(FuncCall->getBeginLoc(),

         "Usage of ASCII file functions (such as %0) is forbidden.",

         DiagnosticIDs::Error)

        << FuncCall->getDirectCallee()->getName();