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cachegrindloader.cpp
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cachegrindloader.cpp
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/*
This file is part of KCachegrind.
SPDX-FileCopyrightText: 2002-2016 Josef Weidendorfer <Josef.Weidendorfer@gmx.de>
SPDX-License-Identifier: GPL-2.0-only
*/
#include "loader.h"
#include <QIODevice>
#include <QVector>
#include <QDebug>
#include "addr.h"
#include "tracedata.h"
#include "utils.h"
#include "fixcost.h"
#define TRACE_LOADER 0
/*
* Loader for Callgrind Profile data (format based on Cachegrind format).
* See Callgrind documentation for the file format.
*/
class CachegrindLoader: public Loader
{
public:
CachegrindLoader();
bool canLoad(QIODevice* file) override;
int load(TraceData*, QIODevice* file, const QString& filename) override;
private:
void error(QString);
void warning(QString);
int loadInternal(TraceData*, QIODevice* file, const QString& filename);
enum lineType { SelfCost, CallCost, BoringJump, CondJump };
bool parsePosition(FixString& s, PositionSpec& newPos);
// position setters
void clearPosition();
void ensureObject();
void ensureFile();
void ensureFunction();
void setObject(const QString&);
void setCalledObject(const QString&);
void setFile(const QString&);
void setCalledFile(const QString&);
void setFunction(const QString&);
void setCalledFunction(const QString&);
void prepareNewPart();
QString _emptyString;
// current line in file to read in
QString _filename;
int _lineNo;
EventTypeMapping* mapping;
TraceData* _data;
TracePart* _part;
int partsAdded;
// current position
lineType nextLineType;
bool hasLineInfo, hasAddrInfo;
PositionSpec currentPos;
// current function/line
TraceObject* currentObject;
TracePartObject* currentPartObject;
TraceFile* currentFile;
TraceFile* currentFunctionFile;
TracePartFile* currentPartFile;
TraceFunction* currentFunction;
TracePartFunction* currentPartFunction;
TraceFunctionSource* currentFunctionSource;
TraceInstr* currentInstr;
TracePartInstr* currentPartInstr;
TraceLine* currentLine;
TracePartLine* currentPartLine;
// current call
TraceObject* currentCalledObject;
TracePartObject* currentCalledPartObject;
TraceFile* currentCalledFile;
TracePartFile* currentCalledPartFile;
TraceFunction* currentCalledFunction;
TracePartFunction* currentCalledPartFunction;
SubCost currentCallCount;
// current jump
TraceFile* currentJumpToFile;
TraceFunction* currentJumpToFunction;
PositionSpec targetPos;
SubCost jumpsFollowed, jumpsExecuted;
/** Support for compressed string format
* This uses the following string compression model
* for objects, files, functions:
* If the name matches
* "(<Integer>) Name": this is a compression specification,
* mapping the integer number to Name and using Name.
* "(<Integer>)" : this is a compression reference.
* Assumes previous compression specification of the
* integer number to a name, uses this name.
* "Name" : Regular name
*/
void clearCompression();
const QString& checkUnknown(const QString& n);
TraceObject* compressedObject(const QString& name);
TraceFile* compressedFile(const QString& name);
TraceFunction* compressedFunction(const QString& name,
TraceFile*, TraceObject*);
QVector<TraceCostItem*> _objectVector, _fileVector, _functionVector;
};
/**********************************************************
* Loader
*/
CachegrindLoader::CachegrindLoader()
: Loader(QStringLiteral("Callgrind"),
QObject::tr( "Import filter for Cachegrind/Callgrind generated profile data files") )
{
}
bool CachegrindLoader::canLoad(QIODevice* file)
{
if (!file) return false;
Q_ASSERT(file->isOpen());
/*
* We recognize this as cachegrind/callgrind format if
* - it starts with a line "# callgrind format", or
* - if the first 2047 bytes contain either "\nevents:" or "\ncreator:"
*/
char buf[2048];
int read = file->read(buf,2047);
if (read < 0)
return false;
buf[read] = 0;
QByteArray s = QByteArray::fromRawData(buf, read+1);
if (s.indexOf("# callgrind format\n") == 0)
return true;
int pos = s.indexOf("events:");
if (pos>0 && buf[pos-1] != '\n') pos = -1;
if (pos>=0) return true;
// callgrind puts a "cmd:" line before "events:", and with big command
// lines, we need another way to detect such callgrind files...
pos = s.indexOf("creator:");
if (pos>0 && buf[pos-1] != '\n') pos = -1;
return (pos>=0);
}
int CachegrindLoader::load(TraceData* d,
QIODevice* file, const QString& filename)
{
/* do the loading in a new object so parallel load
* operations do not interfere each other.
*/
CachegrindLoader l;
l.setLogger(_logger);
return l.loadInternal(d, file, filename);
}
Loader* createCachegrindLoader()
{
return new CachegrindLoader();
}
void CachegrindLoader::error(QString msg)
{
loadError(_lineNo, msg);
}
void CachegrindLoader::warning(QString msg)
{
loadWarning(_lineNo, msg);
}
/**
* Return false if this is no position specification
*/
bool CachegrindLoader::parsePosition(FixString& line,
PositionSpec& newPos)
{
char c;
uint diff;
if (hasAddrInfo) {
if (!line.first(c)) return false;
if (c == '*') {
// nothing changed
line.stripFirst(c);
newPos.fromAddr = currentPos.fromAddr;
newPos.toAddr = currentPos.toAddr;
}
else if (c == '+') {
line.stripFirst(c);
line.stripUInt(diff, false);
newPos.fromAddr = currentPos.fromAddr + diff;
newPos.toAddr = newPos.fromAddr;
}
else if (c == '-') {
line.stripFirst(c);
line.stripUInt(diff, false);
newPos.fromAddr = currentPos.fromAddr - diff;
newPos.toAddr = newPos.fromAddr;
}
else if (c >= '0') {
uint64 v;
line.stripUInt64(v, false);
newPos.fromAddr = Addr(v);
newPos.toAddr = newPos.fromAddr;
}
else return false;
// Range specification
if (line.first(c)) {
if (c == '+') {
line.stripFirst(c);
line.stripUInt(diff);
newPos.toAddr = newPos.fromAddr + diff;
}
else if ((c == '-') || (c == ':')) {
line.stripFirst(c);
uint64 v;
line.stripUInt64(v);
newPos.toAddr = Addr(v);
}
}
line.stripSpaces();
#if TRACE_LOADER
if (newPos.fromAddr == newPos.toAddr)
qDebug() << " Got Addr " << newPos.fromAddr.toString();
else
qDebug() << " Got AddrRange " << newPos.fromAddr.toString()
<< ":" << newPos.toAddr.toString();
#endif
}
if (hasLineInfo) {
if (!line.first(c)) return false;
if (c > '9') return false;
else if (c == '*') {
// nothing changed
line.stripFirst(c);
newPos.fromLine = currentPos.fromLine;
newPos.toLine = currentPos.toLine;
}
else if (c == '+') {
line.stripFirst(c);
line.stripUInt(diff, false);
newPos.fromLine = currentPos.fromLine + diff;
newPos.toLine = newPos.fromLine;
}
else if (c == '-') {
line.stripFirst(c);
line.stripUInt(diff, false);
if (currentPos.fromLine < diff) {
error(QStringLiteral("Negative line number %1")
.arg((int)currentPos.fromLine - (int)diff));
diff = currentPos.fromLine;
}
newPos.fromLine = currentPos.fromLine - diff;
newPos.toLine = newPos.fromLine;
}
else if (c >= '0') {
line.stripUInt(newPos.fromLine, false);
newPos.toLine = newPos.fromLine;
}
else return false;
// Range specification
if (line.first(c)) {
if (c == '+') {
line.stripFirst(c);
line.stripUInt(diff);
newPos.toLine = newPos.fromLine + diff;
}
else if ((c == '-') || (c == ':')) {
line.stripFirst(c);
line.stripUInt(newPos.toLine);
}
}
line.stripSpaces();
#if TRACE_LOADER
if (newPos.fromLine == newPos.toLine)
qDebug() << " Got Line " << newPos.fromLine;
else
qDebug() << " Got LineRange " << newPos.fromLine
<< ":" << newPos.toLine;
#endif
}
return true;
}
// Support for compressed strings
void CachegrindLoader::clearCompression()
{
// this does not delete previous contained objects
_objectVector.clear();
_fileVector.clear();
_functionVector.clear();
// reset to reasonable init size. We double lengths if needed.
_objectVector.resize(100);
_fileVector.resize(1000);
_functionVector.resize(10000);
}
const QString& CachegrindLoader::checkUnknown(const QString& n)
{
if (n == QLatin1String("???")) return _emptyString;
return n;
}
TraceObject* CachegrindLoader::compressedObject(const QString& name)
{
if ((name[0] != '(') || !name[1].isDigit()) return _data->object(checkUnknown(name));
// compressed format using _objectVector
int p = name.indexOf(')');
if (p<2) {
error(QStringLiteral("Invalid compressed ELF object ('%1')").arg(name));
return nullptr;
}
int index = name.mid(1, p-1).toInt();
TraceObject* o = nullptr;
p++;
while((name.length()>p) && name.at(p).isSpace()) p++;
if (name.length()>p) {
if (_objectVector.size() <= index) {
int newSize = index * 2;
#if TRACE_LOADER
qDebug() << " CachegrindLoader: objectVector enlarged to "
<< newSize;
#endif
_objectVector.resize(newSize);
}
QString realName = checkUnknown(name.mid(p));
o = (TraceObject*) _objectVector.at(index);
if (o && (o->name() != realName)) {
error(QStringLiteral("Redefinition of compressed ELF object index %1 (was '%2') to %3")
.arg(index).arg(o->name()).arg(realName));
}
o = _data->object(realName);
_objectVector.replace(index, o);
}
else {
if ((_objectVector.size() <= index) ||
( (o=(TraceObject*)_objectVector.at(index)) == nullptr)) {
error(QStringLiteral("Undefined compressed ELF object index %1").arg(index));
return nullptr;
}
}
return o;
}
// Note: Callgrind sometimes gives different IDs for same file
// (when references to same source file come from different ELF objects)
TraceFile* CachegrindLoader::compressedFile(const QString& name)
{
if ((name[0] != '(') || !name[1].isDigit()) return _data->file(checkUnknown(name));
// compressed format using _fileVector
int p = name.indexOf(')');
if (p<2) {
error(QStringLiteral("Invalid compressed file ('%1')").arg(name));
return nullptr;
}
int index = name.mid(1, p-1).toUInt();
TraceFile* f = nullptr;
p++;
while((name.length()>p) && name.at(p).isSpace()) p++;
if (name.length()>p) {
if (_fileVector.size() <= index) {
int newSize = index * 2;
#if TRACE_LOADER
qDebug() << " CachegrindLoader::fileVector enlarged to "
<< newSize;
#endif
_fileVector.resize(newSize);
}
QString realName = checkUnknown(name.mid(p));
f = (TraceFile*) _fileVector.at(index);
if (f && (f->name() != realName)) {
error(QStringLiteral("Redefinition of compressed file index %1 (was '%2') to %3")
.arg(index).arg(f->name()).arg(realName));
}
f = _data->file(realName);
_fileVector.replace(index, f);
}
else {
if ((_fileVector.size() <= index) ||
( (f=(TraceFile*)_fileVector.at(index)) == nullptr)) {
error(QStringLiteral("Undefined compressed file index %1").arg(index));
return nullptr;
}
}
return f;
}
// Note: Callgrind gives different IDs even for same function
// when parts of the function are from different source files.
// Thus, it is no error when multiple indexes map to same function.
TraceFunction* CachegrindLoader::compressedFunction(const QString& name,
TraceFile* file,
TraceObject* object)
{
if ((name[0] != '(') || !name[1].isDigit())
return _data->function(checkUnknown(name), file, object);
// compressed format using _functionVector
int p = name.indexOf(')');
if (p<2) {
error(QStringLiteral("Invalid compressed function ('%1')").arg(name));
return nullptr;
}
int index = name.mid(1, p-1).toUInt();
TraceFunction* f = nullptr;
p++;
while((name.length()>p) && name.at(p).isSpace()) p++;
if (name.length()>p) {
if (_functionVector.size() <= index) {
int newSize = index * 2;
#if TRACE_LOADER
qDebug() << " CachegrindLoader::functionVector enlarged to "
<< newSize;
#endif
_functionVector.resize(newSize);
}
QString realName = checkUnknown(name.mid(p));
f = (TraceFunction*) _functionVector.at(index);
if (f && (f->name() != realName)) {
error(QStringLiteral("Redefinition of compressed function index %1 (was '%2') to %3")
.arg(index).arg(f->name()).arg(realName));
}
f = _data->function(realName, file, object);
_functionVector.replace(index, f);
#if TRACE_LOADER
qDebug() << "compressedFunction: Inserted at Index " << index
<< "\n " << f->fullName()
<< "\n in " << f->cls()->fullName()
<< "\n in " << f->file()->fullName()
<< "\n in " << f->object()->fullName();
#endif
}
else {
if ((_functionVector.size() <= index) ||
( (f=(TraceFunction*)_functionVector.at(index)) == nullptr)) {
error(QStringLiteral("Undefined compressed function index %1").arg(index));
return nullptr;
}
// there was a check if the used function (returned from KCachegrinds
// model) has the same object and file as here given to us, but that was wrong:
// that holds only if we make this assumption on the model...
}
return f;
}
// make sure that a valid object is set, at least dummy with empty name
void CachegrindLoader::ensureObject()
{
if (currentObject) return;
currentObject = _data->object(_emptyString);
currentPartObject = currentObject->partObject(_part);
}
void CachegrindLoader::setObject(const QString& name)
{
currentObject = compressedObject(name);
if (!currentObject) {
error(QStringLiteral("Invalid ELF object specification, setting to unknown"));
currentObject = _data->object(_emptyString);
}
currentPartObject = currentObject->partObject(_part);
currentFunction = nullptr;
currentPartFunction = nullptr;
}
void CachegrindLoader::setCalledObject(const QString& name)
{
currentCalledObject = compressedObject(name);
if (!currentCalledObject) {
error(QStringLiteral("Invalid specification of called ELF object, setting to unknown"));
currentCalledObject = _data->object(_emptyString);
}
currentCalledPartObject = currentCalledObject->partObject(_part);
}
// make sure that a valid file is set, at least dummy with empty name
void CachegrindLoader::ensureFile()
{
if (currentFile) return;
currentFile = _data->file(_emptyString);
currentPartFile = currentFile->partFile(_part);
}
void CachegrindLoader::setFile(const QString& name)
{
currentFile = compressedFile(name);
if (!currentFile) {
error(QStringLiteral("Invalid file specification, setting to unknown"));
currentFile = _data->file(_emptyString);
}
currentPartFile = currentFile->partFile(_part);
currentLine = nullptr;
currentPartLine = nullptr;
}
void CachegrindLoader::setCalledFile(const QString& name)
{
currentCalledFile = compressedFile(name);
if (!currentCalledFile) {
error(QStringLiteral("Invalid specification of called file, setting to unknown"));
currentCalledFile = _data->file(_emptyString);
}
currentCalledPartFile = currentCalledFile->partFile(_part);
}
// make sure that a valid function is set, at least dummy with empty name
void CachegrindLoader::ensureFunction()
{
if (currentFunction) return;
error(QStringLiteral("Function not specified, setting to unknown"));
ensureFile();
ensureObject();
currentFunction = _data->function(_emptyString,
currentFile,
currentObject);
currentPartFunction = currentFunction->partFunction(_part,
currentPartFile,
currentPartObject);
}
void CachegrindLoader::setFunction(const QString& name)
{
ensureFile();
ensureObject();
currentFunction = compressedFunction( name,
currentFile,
currentObject);
if (!currentFunction) {
error(QStringLiteral("Invalid function specification, setting to unknown"));
currentFunction = _data->function(_emptyString,
currentFile,
currentObject);
}
currentPartFunction = currentFunction->partFunction(_part,
currentPartFile,
currentPartObject);
currentFunctionSource = nullptr;
currentLine = nullptr;
currentPartLine = nullptr;
}
void CachegrindLoader::setCalledFunction(const QString& name)
{
// if called object/file not set, use current object/file
if (!currentCalledObject) {
currentCalledObject = currentObject;
currentCalledPartObject = currentPartObject;
}
if (!currentCalledFile) {
// !=0 as functions needs file
currentCalledFile = currentFile;
currentCalledPartFile = currentPartFile;
}
currentCalledFunction = compressedFunction(name,
currentCalledFile,
currentCalledObject);
if (!currentCalledFunction) {
error(QStringLiteral("Invalid called function, setting to unknown"));
currentCalledFunction = _data->function(_emptyString,
currentCalledFile,
currentCalledObject);
}
currentCalledPartFunction =
currentCalledFunction->partFunction(_part,
currentCalledPartFile,
currentCalledPartObject);
}
void CachegrindLoader::clearPosition()
{
currentPos = PositionSpec();
// current function/line
currentFunction = nullptr;
currentPartFunction = nullptr;
currentFunctionSource = nullptr;
currentFile = nullptr;
currentFunctionFile = nullptr;
currentPartFile = nullptr;
currentObject = nullptr;
currentPartObject = nullptr;
currentLine = nullptr;
currentPartLine = nullptr;
currentInstr = nullptr;
currentPartInstr = nullptr;
// current call
currentCalledObject = nullptr;
currentCalledPartObject = nullptr;
currentCalledFile = nullptr;
currentCalledPartFile = nullptr;
currentCalledFunction = nullptr;
currentCalledPartFunction = nullptr;
currentCallCount = 0;
// current jump
currentJumpToFile = nullptr;
currentJumpToFunction = nullptr;
targetPos = PositionSpec();
jumpsFollowed = 0;
jumpsExecuted = 0;
mapping = nullptr;
}
void CachegrindLoader::prepareNewPart()
{
if (_part) {
// really new part needed?
if (mapping == nullptr) return;
// yes
_part->invalidate();
_part->totals()->clear();
_part->totals()->addCost(_part);
_data->addPart(_part);
partsAdded++;
}
clearCompression();
clearPosition();
_part = new TracePart(_data);
_part->setName(_filename);
}
/**
* The main import function...
*/
int CachegrindLoader::loadInternal(TraceData* data,
QIODevice* device, const QString& filename)
{
if (!data || !device) return 0;
_data = data;
_filename = filename;
_lineNo = 0;
loadStart(_filename);
FixFile file(device, _filename);
if (!file.exists()) {
loadFinished(QStringLiteral("File does not exist"));
return 0;
}
int statusProgress = 0;
#if USE_FIXCOST
// FixCost Memory Pool
FixPool* pool = _data->fixPool();
#endif
_part = nullptr;
partsAdded = 0;
prepareNewPart();
FixString line;
char c;
// current position
nextLineType = SelfCost;
// default if there is no "positions:" line
hasLineInfo = true;
hasAddrInfo = false;
while (file.nextLine(line)) {
_lineNo++;
#if TRACE_LOADER
qDebug() << "[CachegrindLoader] " << _filename << ":" << _lineNo
<< " - '" << QString(line) << "'";
#endif
// if we cannot strip a character, this was an empty line
if (!line.first(c)) continue;
if (c <= '9') {
if (c == '#') continue;
// parse position(s)
if (!parsePosition(line, currentPos)) {
error(QStringLiteral("Invalid position specification '%1'").arg(line));
continue;
}
// go through after big switch
}
else { // if (c > '9')
line.stripFirst(c);
/* in order of probability */
switch(c) {
case 'f':
// fl=
if (line.stripPrefix("l=")) {
setFile(line);
// this is the default for new functions
currentFunctionFile = currentFile;
continue;
}
// fi=, fe=
if (line.stripPrefix("i=") ||
line.stripPrefix("e=")) {
setFile(line);
continue;
}
// fn=
if (line.stripPrefix("n=")) {
if (currentFile != currentFunctionFile)
currentFile = currentFunctionFile;
setFunction(line);
// on a new function, update status
int progress = (int)(100.0 * file.current() / file.len() +.5);
if (progress != statusProgress) {
statusProgress = progress;
/* When this signal is connected, it most probably
* should lead to GUI update. Thus, when multiple
* "long operations" (like file loading) are in progress,
* this can temporarily switch to another operation.
*/
loadProgress(statusProgress);
}
continue;
}
break;
case 'c':
// cob=
if (line.stripPrefix("ob=")) {
setCalledObject(line);
continue;
}
// cfi= / cfl=
if (line.stripPrefix("fl=") ||
line.stripPrefix("fi=")) {
setCalledFile(line);
continue;
}
// cfn=
if (line.stripPrefix("fn=")) {
setCalledFunction(line);
continue;
}
// calls=
if (line.stripPrefix("alls=")) {
// ignore long lines...
line.stripUInt64(currentCallCount);
nextLineType = CallCost;
continue;
}
// cmd:
if (line.stripPrefix("md:")) {
QString command = QString(line).trimmed();
if (!_data->command().isEmpty() &&
_data->command() != command) {
error(QStringLiteral("Redefined command, was '%1'").arg(_data->command()));
}
_data->setCommand(command);
continue;
}
// creator:
if (line.stripPrefix("reator:")) {
// ignore ...
continue;
}
break;
case 'j':
// jcnd=
if (line.stripPrefix("cnd=")) {
bool valid;
valid = line.stripUInt64(jumpsFollowed) &&
line.stripPrefix("/") &&
line.stripUInt64(jumpsExecuted) &&
parsePosition(line, targetPos);
if (!valid) {
error(QStringLiteral("Invalid line after 'jcnd'"));
}
else
nextLineType = CondJump;
continue;
}
if (line.stripPrefix("ump=")) {
bool valid;
valid = line.stripUInt64(jumpsExecuted) &&
parsePosition(line, targetPos);
if (!valid) {
error(QStringLiteral("Invalid line after 'jump'"));
}
else
nextLineType = BoringJump;
continue;
}
// jfi=
if (line.stripPrefix("fi=")) {
currentJumpToFile = compressedFile(line);
continue;
}
// jfn=
if (line.stripPrefix("fn=")) {
if (!currentJumpToFile) {
// !=0 as functions needs file
currentJumpToFile = currentFile;
}
currentJumpToFunction =
compressedFunction(line,
currentJumpToFile,
currentObject);
continue;
}
break;
case 'o':
// ob=
if (line.stripPrefix("b=")) {
setObject(line);
continue;
}
break;
case '#':
continue;
case 'a':
// "arch: arm"
if (line.stripPrefix("rch: arm")) {
TraceData::Arch a = _data->architecture();
if ((a != TraceData::ArchUnknown) &&
(a != TraceData::ArchARM)) {
error(QStringLiteral("Redefined architecture!"));
}
_data->setArchitecture(TraceData::ArchARM);
continue;
}
break;
case 't':
// totals:
if (line.stripPrefix("otals:")) continue;
// thread:
if (line.stripPrefix("hread:")) {
prepareNewPart();
_part->setThreadID(QString(line).toInt());
continue;
}
// timeframe (BB):
if (line.stripPrefix("imeframe (BB):")) {
_part->setTimeframe(line);
continue;
}
break;
case 'd':
// desc:
if (line.stripPrefix("esc:")) {
line.stripSurroundingSpaces();
// desc: Trigger:
if (line.stripPrefix("Trigger:")) {
_part->setTrigger(line);
}
continue;
}
break;
case 'e':
// events:
if (line.stripPrefix("vents:")) {