1//===- AnalysisOrderChecker - Print callbacks called ------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This checker prints callbacks that are called during analysis.
10// This is required to ensure that callbacks are fired in order
11// and do not duplicate or get lost.
12// Feel free to extend this checker with any callback you need to check.
13//
14//===----------------------------------------------------------------------===//
15
16#include "clang/AST/ExprCXX.h"
17#include "clang/Analysis/CFGStmtMap.h"
18#include "clang/StaticAnalyzer/Checkers/BuiltinCheckerRegistration.h"
19#include "clang/StaticAnalyzer/Core/Checker.h"
20#include "clang/StaticAnalyzer/Core/CheckerManager.h"
21#include "clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h"
22#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
23#include "llvm/Support/ErrorHandling.h"
24
25using namespace clang;
26using namespace ento;
27
28namespace {
29
30class AnalysisOrderChecker
31 : public Checker<
32 check::PreStmt<CastExpr>, check::PostStmt<CastExpr>,
33 check::PreStmt<ArraySubscriptExpr>,
34 check::PostStmt<ArraySubscriptExpr>, check::PreStmt<CXXNewExpr>,
35 check::PostStmt<CXXNewExpr>, check::PreStmt<CXXDeleteExpr>,
36 check::PostStmt<CXXDeleteExpr>, check::PreStmt<CXXConstructExpr>,
37 check::PostStmt<CXXConstructExpr>, check::PreStmt<OffsetOfExpr>,
38 check::PostStmt<OffsetOfExpr>, check::PreCall, check::PostCall,
39 check::EndFunction, check::EndAnalysis, check::NewAllocator,
40 check::Bind, check::PointerEscape, check::RegionChanges,
41 check::LiveSymbols, eval::Call> {
42
43 bool isCallbackEnabled(const AnalyzerOptions &Opts,
44 StringRef CallbackName) const {
45 return Opts.getCheckerBooleanOption(C: this, OptionName: "*") ||
46 Opts.getCheckerBooleanOption(C: this, OptionName: CallbackName);
47 }
48
49 bool isCallbackEnabled(CheckerContext &C, StringRef CallbackName) const {
50 AnalyzerOptions &Opts = C.getAnalysisManager().getAnalyzerOptions();
51 return isCallbackEnabled(Opts, CallbackName);
52 }
53
54 bool isCallbackEnabled(ProgramStateRef State, StringRef CallbackName) const {
55 AnalyzerOptions &Opts = State->getStateManager().getOwningEngine()
56 .getAnalysisManager().getAnalyzerOptions();
57 return isCallbackEnabled(Opts, CallbackName);
58 }
59
60public:
61 void checkPreStmt(const CastExpr *CE, CheckerContext &C) const {
62 if (isCallbackEnabled(C, CallbackName: "PreStmtCastExpr"))
63 llvm::errs() << "PreStmt<CastExpr> (Kind : " << CE->getCastKindName()
64 << ")\n";
65 }
66
67 void checkPostStmt(const CastExpr *CE, CheckerContext &C) const {
68 if (isCallbackEnabled(C, CallbackName: "PostStmtCastExpr"))
69 llvm::errs() << "PostStmt<CastExpr> (Kind : " << CE->getCastKindName()
70 << ")\n";
71 }
72
73 void checkPreStmt(const ArraySubscriptExpr *SubExpr,
74 CheckerContext &C) const {
75 if (isCallbackEnabled(C, CallbackName: "PreStmtArraySubscriptExpr"))
76 llvm::errs() << "PreStmt<ArraySubscriptExpr>\n";
77 }
78
79 void checkPostStmt(const ArraySubscriptExpr *SubExpr,
80 CheckerContext &C) const {
81 if (isCallbackEnabled(C, CallbackName: "PostStmtArraySubscriptExpr"))
82 llvm::errs() << "PostStmt<ArraySubscriptExpr>\n";
83 }
84
85 void checkPreStmt(const CXXNewExpr *NE, CheckerContext &C) const {
86 if (isCallbackEnabled(C, CallbackName: "PreStmtCXXNewExpr"))
87 llvm::errs() << "PreStmt<CXXNewExpr>\n";
88 }
89
90 void checkPostStmt(const CXXNewExpr *NE, CheckerContext &C) const {
91 if (isCallbackEnabled(C, CallbackName: "PostStmtCXXNewExpr"))
92 llvm::errs() << "PostStmt<CXXNewExpr>\n";
93 }
94
95 void checkPreStmt(const CXXDeleteExpr *NE, CheckerContext &C) const {
96 if (isCallbackEnabled(C, CallbackName: "PreStmtCXXDeleteExpr"))
97 llvm::errs() << "PreStmt<CXXDeleteExpr>\n";
98 }
99
100 void checkPostStmt(const CXXDeleteExpr *NE, CheckerContext &C) const {
101 if (isCallbackEnabled(C, CallbackName: "PostStmtCXXDeleteExpr"))
102 llvm::errs() << "PostStmt<CXXDeleteExpr>\n";
103 }
104
105 void checkPreStmt(const CXXConstructExpr *NE, CheckerContext &C) const {
106 if (isCallbackEnabled(C, CallbackName: "PreStmtCXXConstructExpr"))
107 llvm::errs() << "PreStmt<CXXConstructExpr>\n";
108 }
109
110 void checkPostStmt(const CXXConstructExpr *NE, CheckerContext &C) const {
111 if (isCallbackEnabled(C, CallbackName: "PostStmtCXXConstructExpr"))
112 llvm::errs() << "PostStmt<CXXConstructExpr>\n";
113 }
114
115 void checkPreStmt(const OffsetOfExpr *OOE, CheckerContext &C) const {
116 if (isCallbackEnabled(C, CallbackName: "PreStmtOffsetOfExpr"))
117 llvm::errs() << "PreStmt<OffsetOfExpr>\n";
118 }
119
120 void checkPostStmt(const OffsetOfExpr *OOE, CheckerContext &C) const {
121 if (isCallbackEnabled(C, CallbackName: "PostStmtOffsetOfExpr"))
122 llvm::errs() << "PostStmt<OffsetOfExpr>\n";
123 }
124
125 bool evalCall(const CallEvent &Call, CheckerContext &C) const {
126 if (isCallbackEnabled(C, CallbackName: "EvalCall")) {
127 llvm::errs() << "EvalCall";
128 if (const NamedDecl *ND = dyn_cast_or_null<NamedDecl>(Val: Call.getDecl()))
129 llvm::errs() << " (" << ND->getQualifiedNameAsString() << ')';
130 llvm::errs() << " {argno: " << Call.getNumArgs() << '}';
131 llvm::errs() << " [" << Call.getKindAsString() << ']';
132 llvm::errs() << '\n';
133 return true;
134 }
135 return false;
136 }
137
138 void checkPreCall(const CallEvent &Call, CheckerContext &C) const {
139 if (isCallbackEnabled(C, CallbackName: "PreCall")) {
140 llvm::errs() << "PreCall";
141 if (const NamedDecl *ND = dyn_cast_or_null<NamedDecl>(Val: Call.getDecl()))
142 llvm::errs() << " (" << ND->getQualifiedNameAsString() << ')';
143 llvm::errs() << " [" << Call.getKindAsString() << ']';
144 llvm::errs() << '\n';
145 }
146 }
147
148 void checkPostCall(const CallEvent &Call, CheckerContext &C) const {
149 if (isCallbackEnabled(C, CallbackName: "PostCall")) {
150 llvm::errs() << "PostCall";
151 if (const NamedDecl *ND = dyn_cast_or_null<NamedDecl>(Val: Call.getDecl()))
152 llvm::errs() << " (" << ND->getQualifiedNameAsString() << ')';
153 llvm::errs() << " [" << Call.getKindAsString() << ']';
154 llvm::errs() << '\n';
155 }
156 }
157
158 void checkEndFunction(const ReturnStmt *S, CheckerContext &C) const {
159 if (isCallbackEnabled(C, CallbackName: "EndFunction")) {
160 llvm::errs() << "EndFunction\nReturnStmt: " << (S ? "yes" : "no") << "\n";
161 if (!S)
162 return;
163
164 llvm::errs() << "CFGElement: ";
165 CFGStmtMap *Map = C.getCurrentAnalysisDeclContext()->getCFGStmtMap();
166 CFGElement LastElement = Map->getBlock(S)->back();
167
168 if (LastElement.getAs<CFGStmt>())
169 llvm::errs() << "CFGStmt\n";
170 else if (LastElement.getAs<CFGAutomaticObjDtor>())
171 llvm::errs() << "CFGAutomaticObjDtor\n";
172 }
173 }
174
175 void checkEndAnalysis(ExplodedGraph &G, BugReporter &BR,
176 ExprEngine &Eng) const {
177 if (isCallbackEnabled(Opts: BR.getAnalyzerOptions(), CallbackName: "EndAnalysis"))
178 llvm::errs() << "EndAnalysis\n";
179 }
180
181 void checkNewAllocator(const CXXAllocatorCall &Call,
182 CheckerContext &C) const {
183 if (isCallbackEnabled(C, CallbackName: "NewAllocator"))
184 llvm::errs() << "NewAllocator\n";
185 }
186
187 void checkBind(SVal Loc, SVal Val, const Stmt *S, CheckerContext &C) const {
188 if (isCallbackEnabled(C, CallbackName: "Bind"))
189 llvm::errs() << "Bind\n";
190 }
191
192 void checkLiveSymbols(ProgramStateRef State, SymbolReaper &SymReaper) const {
193 if (isCallbackEnabled(State, CallbackName: "LiveSymbols"))
194 llvm::errs() << "LiveSymbols\n";
195 }
196
197 ProgramStateRef
198 checkRegionChanges(ProgramStateRef State,
199 const InvalidatedSymbols *Invalidated,
200 ArrayRef<const MemRegion *> ExplicitRegions,
201 ArrayRef<const MemRegion *> Regions,
202 const LocationContext *LCtx, const CallEvent *Call) const {
203 if (isCallbackEnabled(State, CallbackName: "RegionChanges"))
204 llvm::errs() << "RegionChanges\n";
205 return State;
206 }
207
208 ProgramStateRef checkPointerEscape(ProgramStateRef State,
209 const InvalidatedSymbols &Escaped,
210 const CallEvent *Call,
211 PointerEscapeKind Kind) const {
212 if (isCallbackEnabled(State, CallbackName: "PointerEscape"))
213 llvm::errs() << "PointerEscape\n";
214 return State;
215 }
216};
217} // end anonymous namespace
218
219//===----------------------------------------------------------------------===//
220// Registration.
221//===----------------------------------------------------------------------===//
222
223void ento::registerAnalysisOrderChecker(CheckerManager &mgr) {
224 mgr.registerChecker<AnalysisOrderChecker>();
225}
226
227bool ento::shouldRegisterAnalysisOrderChecker(const CheckerManager &mgr) {
228 return true;
229}
230