1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
//===- unittests/Analysis/CFGTest.cpp - CFG tests -------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/Analysis/CFG.h"
#include "clang/Tooling/Tooling.h"
#include "gtest/gtest.h"
#include <string>
#include <vector>
namespace clang {
namespace analysis {
namespace {
enum BuildResult {
ToolFailed,
ToolRan,
SawFunctionBody,
BuiltCFG,
};
class CFGCallback : public ast_matchers::MatchFinder::MatchCallback {
public:
BuildResult TheBuildResult = ToolRan;
void run(const ast_matchers::MatchFinder::MatchResult &Result) override {
const auto *Func = Result.Nodes.getNodeAs<FunctionDecl>("func");
Stmt *Body = Func->getBody();
if (!Body)
return;
TheBuildResult = SawFunctionBody;
CFG::BuildOptions Options;
Options.AddImplicitDtors = true;
if (CFG::buildCFG(nullptr, Body, Result.Context, Options))
TheBuildResult = BuiltCFG;
}
};
BuildResult BuildCFG(const char *Code) {
CFGCallback Callback;
ast_matchers::MatchFinder Finder;
Finder.addMatcher(ast_matchers::functionDecl().bind("func"), &Callback);
std::unique_ptr<tooling::FrontendActionFactory> Factory(
tooling::newFrontendActionFactory(&Finder));
std::vector<std::string> Args = {"-std=c++11", "-fno-delayed-template-parsing"};
if (!tooling::runToolOnCodeWithArgs(Factory->create(), Code, Args))
return ToolFailed;
return Callback.TheBuildResult;
}
// Constructing a CFG for a range-based for over a dependent type fails (but
// should not crash).
TEST(CFG, RangeBasedForOverDependentType) {
const char *Code = "class Foo;\n"
"template <typename T>\n"
"void f(const T &Range) {\n"
" for (const Foo *TheFoo : Range) {\n"
" }\n"
"}\n";
EXPECT_EQ(SawFunctionBody, BuildCFG(Code));
}
// Constructing a CFG containing a delete expression on a dependent type should
// not crash.
TEST(CFG, DeleteExpressionOnDependentType) {
const char *Code = "template<class T>\n"
"void f(T t) {\n"
" delete t;\n"
"}\n";
EXPECT_EQ(BuiltCFG, BuildCFG(Code));
}
// Constructing a CFG on a function template with a variable of incomplete type
// should not crash.
TEST(CFG, VariableOfIncompleteType) {
const char *Code = "template<class T> void f() {\n"
" class Undefined;\n"
" Undefined u;\n"
"}\n";
EXPECT_EQ(BuiltCFG, BuildCFG(Code));
}
} // namespace
} // namespace analysis
} // namespace clang
|
