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//===--- NoMallocCheck.cpp - clang-tidy------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "NoMallocCheck.h"
#include "clang/AST/ASTContext.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include <iostream>
#include <string>
using namespace clang::ast_matchers;
namespace clang {
namespace tidy {
namespace cppcoreguidelines {
void NoMallocCheck::registerMatchers(MatchFinder *Finder) {
// C-style memory management is only problematic in C++.
if (!getLangOpts().CPlusPlus)
return;
// Registering malloc, will suggest RAII.
Finder->addMatcher(
callExpr(callee(functionDecl(hasAnyName("::malloc", "::calloc"))))
.bind("aquisition"),
this);
// Registering realloc calls, suggest std::vector or std::string.
Finder->addMatcher(
callExpr(callee(functionDecl(hasName("::realloc")))).bind("realloc"),
this);
// Registering free calls, will suggest RAII instead.
Finder->addMatcher(
callExpr(callee(functionDecl(hasName("::free")))).bind("free"), this);
}
void NoMallocCheck::check(const MatchFinder::MatchResult &Result) {
const CallExpr *Call = nullptr;
StringRef Recommendation;
if ((Call = Result.Nodes.getNodeAs<CallExpr>("aquisition")))
Recommendation = "consider a container or a smart pointer";
else if ((Call = Result.Nodes.getNodeAs<CallExpr>("realloc")))
Recommendation = "consider std::vector or std::string";
else if ((Call = Result.Nodes.getNodeAs<CallExpr>("free")))
Recommendation = "use RAII";
assert(Call && "Unhandled binding in the Matcher");
diag(Call->getLocStart(), "do not manage memory manually; %0")
<< Recommendation << SourceRange(Call->getLocStart(), Call->getLocEnd());
}
} // namespace cppcoreguidelines
} // namespace tidy
} // namespace clang
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