1#include "clang/StaticAnalyzer/Core/BugReporter/BugType.h"
2#include "clang/StaticAnalyzer/Core/Checker.h"
3#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
4#include "clang/StaticAnalyzer/Frontend/CheckerRegistry.h"
5
6using namespace clang;
7using namespace ento;
8
9namespace {
10class MainCallChecker : public Checker<check::PreStmt<CallExpr>> {
11 mutable std::unique_ptr<BugType> BT;
12
13public:
14 void checkPreStmt(const CallExpr *CE, CheckerContext &C) const;
15};
16} // end anonymous namespace
17
18void MainCallChecker::checkPreStmt(const CallExpr *CE,
19 CheckerContext &C) const {
20 const Expr *Callee = CE->getCallee();
21 const FunctionDecl *FD = C.getSVal(S: Callee).getAsFunctionDecl();
22
23 if (!FD)
24 return;
25
26 // Get the name of the callee.
27 IdentifierInfo *II = FD->getIdentifier();
28 if (!II) // if no identifier, not a simple C function
29 return;
30
31 if (II->isStr(Str: "main")) {
32 ExplodedNode *N = C.generateErrorNode();
33 if (!N)
34 return;
35
36 if (!BT)
37 BT.reset(p: new BugType(this, "call to main", "example analyzer plugin"));
38
39 auto report =
40 std::make_unique<PathSensitiveBugReport>(args&: *BT, args: BT->getDescription(), args&: N);
41 report->addRange(R: Callee->getSourceRange());
42 C.emitReport(R: std::move(report));
43 }
44}
45
46// Register plugin!
47extern "C" void clang_registerCheckers(CheckerRegistry &registry) {
48 registry.addChecker<MainCallChecker>(
49 FullName: "example.MainCallChecker", Desc: "Disallows calls to functions called main",
50 DocsUri: "");
51}
52
53extern "C" const char clang_analyzerAPIVersionString[] =
54 CLANG_ANALYZER_API_VERSION_STRING;
55