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
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
| //===- llvm/unittest/IR/VerifierTest.cpp - Verifier unit tests --*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/Verifier.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DIBuilder.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/GlobalAlias.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "gtest/gtest.h"
namespace llvm {
namespace {
TEST(VerifierTest, Branch_i1) {
LLVMContext C;
Module M("M", C);
FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), /*isVarArg=*/false);
Function *F = Function::Create(FTy, Function::ExternalLinkage, "foo", M);
BasicBlock *Entry = BasicBlock::Create(C, "entry", F);
BasicBlock *Exit = BasicBlock::Create(C, "exit", F);
ReturnInst::Create(C, Exit);
// To avoid triggering an assertion in BranchInst::Create, we first create
// a branch with an 'i1' condition ...
Constant *False = ConstantInt::getFalse(C);
BranchInst *BI = BranchInst::Create(Exit, Exit, False, Entry);
// ... then use setOperand to redirect it to a value of different type.
Constant *Zero32 = ConstantInt::get(IntegerType::get(C, 32), 0);
BI->setOperand(0, Zero32);
EXPECT_TRUE(verifyFunction(*F));
}
TEST(VerifierTest, InvalidRetAttribute) {
LLVMContext C;
Module M("M", C);
FunctionType *FTy = FunctionType::get(Type::getInt32Ty(C), /*isVarArg=*/false);
Function *F = Function::Create(FTy, Function::ExternalLinkage, "foo", M);
AttributeList AS = F->getAttributes();
F->setAttributes(
AS.addAttribute(C, AttributeList::ReturnIndex, Attribute::UWTable));
std::string Error;
raw_string_ostream ErrorOS(Error);
EXPECT_TRUE(verifyModule(M, &ErrorOS));
EXPECT_TRUE(StringRef(ErrorOS.str()).startswith(
"Attribute 'uwtable' only applies to functions!"));
}
TEST(VerifierTest, CrossModuleRef) {
LLVMContext C;
Module M1("M1", C);
Module M2("M2", C);
Module M3("M3", C);
FunctionType *FTy = FunctionType::get(Type::getInt32Ty(C), /*isVarArg=*/false);
Function *F1 = Function::Create(FTy, Function::ExternalLinkage, "foo1", M1);
Function *F2 = Function::Create(FTy, Function::ExternalLinkage, "foo2", M2);
Function *F3 = Function::Create(FTy, Function::ExternalLinkage, "foo3", M3);
BasicBlock *Entry1 = BasicBlock::Create(C, "entry", F1);
BasicBlock *Entry3 = BasicBlock::Create(C, "entry", F3);
// BAD: Referencing function in another module
CallInst::Create(F2,"call",Entry1);
// BAD: Referencing personality routine in another module
F3->setPersonalityFn(F2);
// Fill in the body
Constant *ConstZero = ConstantInt::get(Type::getInt32Ty(C), 0);
ReturnInst::Create(C, ConstZero, Entry1);
ReturnInst::Create(C, ConstZero, Entry3);
std::string Error;
raw_string_ostream ErrorOS(Error);
EXPECT_TRUE(verifyModule(M2, &ErrorOS));
EXPECT_TRUE(StringRef(ErrorOS.str())
.equals("Global is used by function in a different module\n"
"i32 ()* @foo2\n"
"; ModuleID = 'M2'\n"
"i32 ()* @foo3\n"
"; ModuleID = 'M3'\n"
"Global is referenced in a different module!\n"
"i32 ()* @foo2\n"
"; ModuleID = 'M2'\n"
" %call = call i32 @foo2()\n"
"i32 ()* @foo1\n"
"; ModuleID = 'M1'\n"));
Error.clear();
EXPECT_TRUE(verifyModule(M1, &ErrorOS));
EXPECT_TRUE(StringRef(ErrorOS.str()).equals(
"Referencing function in another module!\n"
" %call = call i32 @foo2()\n"
"; ModuleID = 'M1'\n"
"i32 ()* @foo2\n"
"; ModuleID = 'M2'\n"));
Error.clear();
EXPECT_TRUE(verifyModule(M3, &ErrorOS));
EXPECT_TRUE(StringRef(ErrorOS.str()).startswith(
"Referencing personality function in another module!"));
// Erase bad methods to avoid triggering an assertion failure on destruction
F1->eraseFromParent();
F3->eraseFromParent();
}
TEST(VerifierTest, InvalidVariableLinkage) {
LLVMContext C;
Module M("M", C);
new GlobalVariable(M, Type::getInt8Ty(C), false,
GlobalValue::LinkOnceODRLinkage, nullptr, "Some Global");
std::string Error;
raw_string_ostream ErrorOS(Error);
EXPECT_TRUE(verifyModule(M, &ErrorOS));
EXPECT_TRUE(
StringRef(ErrorOS.str()).startswith("Global is external, but doesn't "
"have external or weak linkage!"));
}
TEST(VerifierTest, InvalidFunctionLinkage) {
LLVMContext C;
Module M("M", C);
FunctionType *FTy = FunctionType::get(Type::getVoidTy(C), /*isVarArg=*/false);
Function::Create(FTy, GlobalValue::LinkOnceODRLinkage, "foo", &M);
std::string Error;
raw_string_ostream ErrorOS(Error);
EXPECT_TRUE(verifyModule(M, &ErrorOS));
EXPECT_TRUE(
StringRef(ErrorOS.str()).startswith("Global is external, but doesn't "
"have external or weak linkage!"));
}
TEST(VerifierTest, DetectInvalidDebugInfo) {
{
LLVMContext C;
Module M("M", C);
DIBuilder DIB(M);
DIB.createCompileUnit(dwarf::DW_LANG_C89, DIB.createFile("broken.c", "/"),
"unittest", false, "", 0);
DIB.finalize();
EXPECT_FALSE(verifyModule(M));
// Now break it by inserting non-CU node to the list of CUs.
auto *File = DIB.createFile("not-a-CU.f", ".");
NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.cu");
NMD->addOperand(File);
EXPECT_TRUE(verifyModule(M));
}
{
LLVMContext C;
Module M("M", C);
DIBuilder DIB(M);
auto *CU = DIB.createCompileUnit(dwarf::DW_LANG_C89,
DIB.createFile("broken.c", "/"),
"unittest", false, "", 0);
new GlobalVariable(M, Type::getInt8Ty(C), false,
GlobalValue::ExternalLinkage, nullptr, "g");
auto *F = Function::Create(FunctionType::get(Type::getVoidTy(C), false),
Function::ExternalLinkage, "f", M);
IRBuilder<> Builder(BasicBlock::Create(C, "", F));
Builder.CreateUnreachable();
F->setSubprogram(DIB.createFunction(
CU, "f", "f", DIB.createFile("broken.c", "/"), 1, nullptr, 1,
DINode::FlagZero,
DISubprogram::SPFlagLocalToUnit | DISubprogram::SPFlagDefinition));
DIB.finalize();
EXPECT_FALSE(verifyModule(M));
// Now break it by not listing the CU at all.
M.eraseNamedMetadata(M.getOrInsertNamedMetadata("llvm.dbg.cu"));
EXPECT_TRUE(verifyModule(M));
}
}
} // end anonymous namespace
} // end namespace llvm
|