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//===-- tools/llvm-cov/GCOVReader.h - LLVM coverage tool --------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This header provides the interface to read coverage files that use 'gcov'
// format.
//
//===----------------------------------------------------------------------===//
#ifndef GCOVREADER_H
#define GCOVREADER_H
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
namespace llvm {
class GCOVFunction;
class GCOVBlock;
class GCOVLines;
class FileInfo;
enum GCOVFormat {
InvalidGCOV,
GCNO_402,
GCNO_404,
GCDA_402,
GCDA_404
};
/// GCOVBuffer - A wrapper around MemoryBuffer to provide GCOV specific
/// read operations.
class GCOVBuffer {
public:
GCOVBuffer(MemoryBuffer *B) : Buffer(B), Cursor(0) {}
/// readGCOVFormat - Read GCOV signature at the beginning of buffer.
enum GCOVFormat readGCOVFormat() {
StringRef Magic = Buffer->getBuffer().slice(0, 12);
Cursor = 12;
if (Magic == "oncg*404MVLL")
return GCNO_404;
else if (Magic == "oncg*204MVLL")
return GCNO_402;
else if (Magic == "adcg*404MVLL")
return GCDA_404;
else if (Magic == "adcg*204MVLL")
return GCDA_402;
Cursor = 0;
return InvalidGCOV;
}
/// readFunctionTag - If cursor points to a function tag then increment the
/// cursor and return true otherwise return false.
bool readFunctionTag() {
StringRef Tag = Buffer->getBuffer().slice(Cursor, Cursor+4);
if (Tag.empty() ||
Tag[0] != '\0' || Tag[1] != '\0' ||
Tag[2] != '\0' || Tag[3] != '\1') {
return false;
}
Cursor += 4;
return true;
}
/// readBlockTag - If cursor points to a block tag then increment the
/// cursor and return true otherwise return false.
bool readBlockTag() {
StringRef Tag = Buffer->getBuffer().slice(Cursor, Cursor+4);
if (Tag.empty() ||
Tag[0] != '\0' || Tag[1] != '\0' ||
Tag[2] != '\x41' || Tag[3] != '\x01') {
return false;
}
Cursor += 4;
return true;
}
/// readEdgeTag - If cursor points to an edge tag then increment the
/// cursor and return true otherwise return false.
bool readEdgeTag() {
StringRef Tag = Buffer->getBuffer().slice(Cursor, Cursor+4);
if (Tag.empty() ||
Tag[0] != '\0' || Tag[1] != '\0' ||
Tag[2] != '\x43' || Tag[3] != '\x01') {
return false;
}
Cursor += 4;
return true;
}
/// readLineTag - If cursor points to a line tag then increment the
/// cursor and return true otherwise return false.
bool readLineTag() {
StringRef Tag = Buffer->getBuffer().slice(Cursor, Cursor+4);
if (Tag.empty() ||
Tag[0] != '\0' || Tag[1] != '\0' ||
Tag[2] != '\x45' || Tag[3] != '\x01') {
return false;
}
Cursor += 4;
return true;
}
/// readArcTag - If cursor points to an gcda arc tag then increment the
/// cursor and return true otherwise return false.
bool readArcTag() {
StringRef Tag = Buffer->getBuffer().slice(Cursor, Cursor+4);
if (Tag.empty() ||
Tag[0] != '\0' || Tag[1] != '\0' ||
Tag[2] != '\xa1' || Tag[3] != '\1') {
return false;
}
Cursor += 4;
return true;
}
uint32_t readInt() {
uint32_t Result;
StringRef Str = Buffer->getBuffer().slice(Cursor, Cursor+4);
assert (Str.empty() == false && "Unexpected memory buffer end!");
Cursor += 4;
Result = *(uint32_t *)(Str.data());
return Result;
}
uint64_t readInt64() {
uint64_t Lo = readInt();
uint64_t Hi = readInt();
uint64_t Result = Lo | (Hi << 32);
return Result;
}
StringRef readString() {
uint32_t Len = readInt() * 4;
StringRef Str = Buffer->getBuffer().slice(Cursor, Cursor+Len);
Cursor += Len;
return Str;
}
uint64_t getCursor() const { return Cursor; }
private:
MemoryBuffer *Buffer;
uint64_t Cursor;
};
/// GCOVFile - Collects coverage information for one pair of coverage file
/// (.gcno and .gcda).
class GCOVFile {
public:
GCOVFile() {}
~GCOVFile();
bool read(GCOVBuffer &Buffer);
void dump();
void collectLineCounts(FileInfo &FI);
private:
SmallVector<GCOVFunction *, 16> Functions;
};
/// GCOVFunction - Collects function information.
class GCOVFunction {
public:
GCOVFunction() : Ident(0), LineNumber(0) {}
~GCOVFunction();
bool read(GCOVBuffer &Buffer, GCOVFormat Format);
void dump();
void collectLineCounts(FileInfo &FI);
private:
uint32_t Ident;
uint32_t LineNumber;
StringRef Name;
StringRef Filename;
SmallVector<GCOVBlock *, 16> Blocks;
};
/// GCOVBlock - Collects block information.
class GCOVBlock {
public:
GCOVBlock(uint32_t N) : Number(N), Counter(0) {}
~GCOVBlock();
void addEdge(uint32_t N) { Edges.push_back(N); }
void addLine(StringRef Filename, uint32_t LineNo);
void addCount(uint64_t N) { Counter = N; }
void dump();
void collectLineCounts(FileInfo &FI);
private:
uint32_t Number;
uint64_t Counter;
SmallVector<uint32_t, 16> Edges;
StringMap<GCOVLines *> Lines;
};
/// GCOVLines - A wrapper around a vector of int to keep track of line nos.
class GCOVLines {
public:
~GCOVLines() { Lines.clear(); }
void add(uint32_t N) { Lines.push_back(N); }
void collectLineCounts(FileInfo &FI, StringRef Filename, uint32_t Count);
void dump();
private:
SmallVector<uint32_t, 4> Lines;
};
typedef SmallVector<uint32_t, 16> LineCounts;
class FileInfo {
public:
void addLineCount(StringRef Filename, uint32_t Line, uint32_t Count);
void print();
private:
StringMap<LineCounts> LineInfo;
};
}
#endif
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