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
|
//===---- CoverageMappingGen.h - Coverage mapping generation ----*- 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
//
//===----------------------------------------------------------------------===//
//
// Instrumentation-based code coverage mapping generator
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_LIB_CODEGEN_COVERAGEMAPPINGGEN_H
#define LLVM_CLANG_LIB_CODEGEN_COVERAGEMAPPINGGEN_H
#include "clang/Basic/LLVM.h"
#include "clang/Basic/SourceLocation.h"
#include "clang/Lex/PPCallbacks.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/IR/GlobalValue.h"
#include "llvm/Support/raw_ostream.h"
namespace clang {
class LangOptions;
class SourceManager;
class FileEntry;
class Preprocessor;
class Decl;
class Stmt;
/// Stores additional source code information like skipped ranges which
/// is required by the coverage mapping generator and is obtained from
/// the preprocessor.
class CoverageSourceInfo : public PPCallbacks {
std::vector<SourceRange> SkippedRanges;
public:
ArrayRef<SourceRange> getSkippedRanges() const { return SkippedRanges; }
void SourceRangeSkipped(SourceRange Range, SourceLocation EndifLoc) override;
};
namespace CodeGen {
class CodeGenModule;
/// Organizes the cross-function state that is used while generating
/// code coverage mapping data.
class CoverageMappingModuleGen {
/// Information needed to emit a coverage record for a function.
struct FunctionInfo {
uint64_t NameHash;
uint64_t FuncHash;
std::string CoverageMapping;
bool IsUsed;
};
CodeGenModule &CGM;
CoverageSourceInfo &SourceInfo;
llvm::SmallDenseMap<const FileEntry *, unsigned, 8> FileEntries;
std::vector<llvm::Constant *> FunctionNames;
std::vector<FunctionInfo> FunctionRecords;
/// Emit a function record.
void emitFunctionMappingRecord(const FunctionInfo &Info,
uint64_t FilenamesRef);
public:
CoverageMappingModuleGen(CodeGenModule &CGM, CoverageSourceInfo &SourceInfo)
: CGM(CGM), SourceInfo(SourceInfo) {}
CoverageSourceInfo &getSourceInfo() const {
return SourceInfo;
}
/// Add a function's coverage mapping record to the collection of the
/// function mapping records.
void addFunctionMappingRecord(llvm::GlobalVariable *FunctionName,
StringRef FunctionNameValue,
uint64_t FunctionHash,
const std::string &CoverageMapping,
bool IsUsed = true);
/// Emit the coverage mapping data for a translation unit.
void emit();
/// Return the coverage mapping translation unit file id
/// for the given file.
unsigned getFileID(const FileEntry *File);
};
/// Organizes the per-function state that is used while generating
/// code coverage mapping data.
class CoverageMappingGen {
CoverageMappingModuleGen &CVM;
SourceManager &SM;
const LangOptions &LangOpts;
llvm::DenseMap<const Stmt *, unsigned> *CounterMap;
public:
CoverageMappingGen(CoverageMappingModuleGen &CVM, SourceManager &SM,
const LangOptions &LangOpts)
: CVM(CVM), SM(SM), LangOpts(LangOpts), CounterMap(nullptr) {}
CoverageMappingGen(CoverageMappingModuleGen &CVM, SourceManager &SM,
const LangOptions &LangOpts,
llvm::DenseMap<const Stmt *, unsigned> *CounterMap)
: CVM(CVM), SM(SM), LangOpts(LangOpts), CounterMap(CounterMap) {}
/// Emit the coverage mapping data which maps the regions of
/// code to counters that will be used to find the execution
/// counts for those regions.
void emitCounterMapping(const Decl *D, llvm::raw_ostream &OS);
/// Emit the coverage mapping data for an unused function.
/// It creates mapping regions with the counter of zero.
void emitEmptyMapping(const Decl *D, llvm::raw_ostream &OS);
};
} // end namespace CodeGen
} // end namespace clang
#endif
|
