llvm-6502/lib/IR/GCOV.cpp

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//===- GCOVr.cpp - LLVM coverage tool -------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// GCOV implements the interface to read and write coverage files that use
// 'gcov' format.
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/GCOV.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Support/MemoryObject.h"
#include "llvm/Support/system_error.h"
using namespace llvm;
//===----------------------------------------------------------------------===//
// GCOVFile implementation.
/// ~GCOVFile - Delete GCOVFile and its content.
GCOVFile::~GCOVFile() {
DeleteContainerPointers(Functions);
}
/// isGCDAFile - Return true if Format identifies a .gcda file.
static bool isGCDAFile(GCOV::GCOVFormat Format) {
return Format == GCOV::GCDA_402 || Format == GCOV::GCDA_404;
}
/// isGCNOFile - Return true if Format identifies a .gcno file.
static bool isGCNOFile(GCOV::GCOVFormat Format) {
return Format == GCOV::GCNO_402 || Format == GCOV::GCNO_404;
}
/// read - Read GCOV buffer.
bool GCOVFile::read(GCOVBuffer &Buffer) {
GCOV::GCOVFormat Format = Buffer.readGCOVFormat();
if (Format == GCOV::InvalidGCOV)
return false;
unsigned i = 0;
while (1) {
GCOVFunction *GFun = NULL;
if (isGCDAFile(Format)) {
// Use existing function while reading .gcda file.
assert(i < Functions.size() && ".gcda data does not match .gcno data");
GFun = Functions[i];
} else if (isGCNOFile(Format)){
GFun = new GCOVFunction();
Functions.push_back(GFun);
}
if (!GFun || !GFun->read(Buffer, Format))
break;
++i;
}
return true;
}
/// dump - Dump GCOVFile content on standard out for debugging purposes.
void GCOVFile::dump() {
for (SmallVectorImpl<GCOVFunction *>::iterator I = Functions.begin(),
E = Functions.end(); I != E; ++I)
(*I)->dump();
}
/// collectLineCounts - Collect line counts. This must be used after
/// reading .gcno and .gcda files.
void GCOVFile::collectLineCounts(FileInfo &FI) {
for (SmallVectorImpl<GCOVFunction *>::iterator I = Functions.begin(),
E = Functions.end(); I != E; ++I)
(*I)->collectLineCounts(FI);
FI.print();
}
//===----------------------------------------------------------------------===//
// GCOVFunction implementation.
/// ~GCOVFunction - Delete GCOVFunction and its content.
GCOVFunction::~GCOVFunction() {
DeleteContainerPointers(Blocks);
}
/// read - Read a aunction from the buffer. Return false if buffer cursor
/// does not point to a function tag.
bool GCOVFunction::read(GCOVBuffer &Buff, GCOV::GCOVFormat Format) {
if (!Buff.readFunctionTag())
return false;
Buff.readInt(); // Function header length
Ident = Buff.readInt();
Buff.readInt(); // Checksum #1
if (Format != GCOV::GCNO_402 && Format != GCOV::GCDA_402)
Buff.readInt(); // Checksum #2
Name = Buff.readString();
if (Format == GCOV::GCNO_402 || Format == GCOV::GCNO_404)
Filename = Buff.readString();
if (Format == GCOV::GCDA_402 || Format == GCOV::GCDA_404) {
Buff.readArcTag();
uint32_t Count = Buff.readInt() / 2;
for (unsigned i = 0, e = Count; i != e; ++i) {
Blocks[i]->addCount(Buff.readInt64());
}
return true;
}
LineNumber = Buff.readInt();
// read blocks.
bool BlockTagFound = Buff.readBlockTag();
(void)BlockTagFound;
assert(BlockTagFound && "Block Tag not found!");
uint32_t BlockCount = Buff.readInt();
for (int i = 0, e = BlockCount; i != e; ++i) {
Buff.readInt(); // Block flags;
Blocks.push_back(new GCOVBlock(i));
}
// read edges.
while (Buff.readEdgeTag()) {
uint32_t EdgeCount = (Buff.readInt() - 1) / 2;
uint32_t BlockNo = Buff.readInt();
assert(BlockNo < BlockCount && "Unexpected Block number!");
for (int i = 0, e = EdgeCount; i != e; ++i) {
Blocks[BlockNo]->addEdge(Buff.readInt());
Buff.readInt(); // Edge flag
}
}
// read line table.
while (Buff.readLineTag()) {
uint32_t LineTableLength = Buff.readInt();
uint32_t Size = Buff.getCursor() + LineTableLength*4;
uint32_t BlockNo = Buff.readInt();
assert(BlockNo < BlockCount && "Unexpected Block number!");
GCOVBlock *Block = Blocks[BlockNo];
Buff.readInt(); // flag
while (Buff.getCursor() != (Size - 4)) {
StringRef Filename = Buff.readString();
if (Buff.getCursor() == (Size - 4)) break;
while (uint32_t L = Buff.readInt())
Block->addLine(Filename, L);
}
Buff.readInt(); // flag
}
return true;
}
/// dump - Dump GCOVFunction content on standard out for debugging purposes.
void GCOVFunction::dump() {
outs() << "===== " << Name << " @ " << Filename << ":" << LineNumber << "\n";
for (SmallVectorImpl<GCOVBlock *>::iterator I = Blocks.begin(),
E = Blocks.end(); I != E; ++I)
(*I)->dump();
}
/// collectLineCounts - Collect line counts. This must be used after
/// reading .gcno and .gcda files.
void GCOVFunction::collectLineCounts(FileInfo &FI) {
for (SmallVectorImpl<GCOVBlock *>::iterator I = Blocks.begin(),
E = Blocks.end(); I != E; ++I)
(*I)->collectLineCounts(FI);
}
//===----------------------------------------------------------------------===//
// GCOVBlock implementation.
/// ~GCOVBlock - Delete GCOVBlock and its content.
GCOVBlock::~GCOVBlock() {
Edges.clear();
DeleteContainerSeconds(Lines);
}
void GCOVBlock::addLine(StringRef Filename, uint32_t LineNo) {
GCOVLines *&LinesForFile = Lines[Filename];
if (!LinesForFile)
LinesForFile = new GCOVLines();
LinesForFile->add(LineNo);
}
/// collectLineCounts - Collect line counts. This must be used after
/// reading .gcno and .gcda files.
void GCOVBlock::collectLineCounts(FileInfo &FI) {
for (StringMap<GCOVLines *>::iterator I = Lines.begin(),
E = Lines.end(); I != E; ++I)
I->second->collectLineCounts(FI, I->first(), Counter);
}
/// dump - Dump GCOVBlock content on standard out for debugging purposes.
void GCOVBlock::dump() {
outs() << "Block : " << Number << " Counter : " << Counter << "\n";
if (!Edges.empty()) {
outs() << "\tEdges : ";
for (SmallVectorImpl<uint32_t>::iterator I = Edges.begin(), E = Edges.end();
I != E; ++I)
outs() << (*I) << ",";
outs() << "\n";
}
if (!Lines.empty()) {
outs() << "\tLines : ";
for (StringMap<GCOVLines *>::iterator LI = Lines.begin(),
LE = Lines.end(); LI != LE; ++LI) {
outs() << LI->first() << " -> ";
LI->second->dump();
outs() << "\n";
}
}
}
//===----------------------------------------------------------------------===//
// GCOVLines implementation.
/// collectLineCounts - Collect line counts. This must be used after
/// reading .gcno and .gcda files.
void GCOVLines::collectLineCounts(FileInfo &FI, StringRef Filename,
uint32_t Count) {
for (SmallVectorImpl<uint32_t>::iterator I = Lines.begin(),
E = Lines.end(); I != E; ++I)
FI.addLineCount(Filename, *I, Count);
}
/// dump - Dump GCOVLines content on standard out for debugging purposes.
void GCOVLines::dump() {
for (SmallVectorImpl<uint32_t>::iterator I = Lines.begin(),
E = Lines.end(); I != E; ++I)
outs() << (*I) << ",";
}
//===----------------------------------------------------------------------===//
// FileInfo implementation.
/// addLineCount - Add line count for the given line number in a file.
void FileInfo::addLineCount(StringRef Filename, uint32_t Line, uint32_t Count) {
if (LineInfo.find(Filename) == LineInfo.end()) {
OwningPtr<MemoryBuffer> Buff;
if (error_code ec = MemoryBuffer::getFileOrSTDIN(Filename, Buff)) {
errs() << Filename << ": " << ec.message() << "\n";
return;
}
StringRef AllLines = Buff.take()->getBuffer();
LineCounts L(AllLines.count('\n')+2);
L[Line-1] = Count;
LineInfo[Filename] = L;
return;
}
LineCounts &L = LineInfo[Filename];
L[Line-1] = Count;
}
/// print - Print source files with collected line count information.
void FileInfo::print() {
for (StringMap<LineCounts>::iterator I = LineInfo.begin(), E = LineInfo.end();
I != E; ++I) {
StringRef Filename = I->first();
outs() << Filename << "\n";
LineCounts &L = LineInfo[Filename];
OwningPtr<MemoryBuffer> Buff;
if (error_code ec = MemoryBuffer::getFileOrSTDIN(Filename, Buff)) {
errs() << Filename << ": " << ec.message() << "\n";
return;
}
StringRef AllLines = Buff.take()->getBuffer();
for (unsigned i = 0, e = L.size(); i != e; ++i) {
if (L[i])
outs() << L[i] << ":\t";
else
outs() << " :\t";
std::pair<StringRef, StringRef> P = AllLines.split('\n');
if (AllLines != P.first)
outs() << P.first;
outs() << "\n";
AllLines = P.second;
}
}
}