build/clang-plugin/LoadLibraryUsageChecker.cpp

   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 "LoadLibraryUsageChecker.h"
   6 #include "CustomMatchers.h"
   7
   8 // On MacOS the filesystem is UTF-8, on linux the canonical filename is 8-bit
   9 // string. On Windows data loss conversion will occur. This checker restricts
  10 // the use of ASCII file functions for loading libraries.
  11
  12 void LoadLibraryUsageChecker::registerMatchers(MatchFinder *AstMatcher) {
  13   AstMatcher->addMatcher(
  14       callExpr(
  15           allOf(isFirstParty(),
  16                 callee(functionDecl(anyOf(
  17                     allOf(isInSystemHeader(), anyOf(hasName("LoadLibraryA"),
  18                                                     hasName("LoadLibraryExA"))),
  19                     hasName("PR_LoadLibrary")))),
  20                 unless(hasArgument(0, stringLiteral()))))
  21           .bind("funcCall"),
  22       this);
  23 }
  24
  25 void LoadLibraryUsageChecker::check(const MatchFinder::MatchResult &Result) {
  26   const CallExpr *FuncCall = Result.Nodes.getNodeAs<CallExpr>("funcCall");
  27
  28   if (FuncCall) {
  29     diag(FuncCall->getBeginLoc(),
  30          "Usage of ASCII file functions (such as %0) is forbidden.",
  31          DiagnosticIDs::Error)
  32         << FuncCall->getDirectCallee()->getName();
  33   }
  34 }