FileInfo Class Reference

Collaboration diagram for FileInfo:

Classes
struct	CacheItem
struct	CacheItemComparator

Public Types
typedef int	Offset

Public Member Functions
	FileInfo (void)
	FileInfo (const std::string &name, bool useGdb)
const char *	symbolByOffset (Offset offset)
Offset	next (Offset offset)

Public Attributes
std::string	NAME

Private Types
typedef std::vector< CacheItem >	SymbolCache

Private Member Functions
void	createOffsetMap (void)

Private Attributes
SymbolCache	m_symbolCache

Detailed Description

Definition at line 156 of file pfm_gen_analysis.cpp.

Member Typedef Documentation

typedef int FileInfo::Offset

Definition at line 159 of file pfm_gen_analysis.cpp.

typedef std::vector<CacheItem> FileInfo::SymbolCache

private

Definition at line 205 of file pfm_gen_analysis.cpp.

Constructor & Destructor Documentation

FileInfo::FileInfo ( void  )

inline

Definition at line 161 of file pfm_gen_analysis.cpp.

: NAME( "<dynamically generated>" ) {}

FileInfo::FileInfo ( const std::string &  name, bool  useGdb  )

inline

Definition at line 162 of file pfm_gen_analysis.cpp.

                                                 : NAME( name )
  {
    if ( useGdb ) {
      this->createOffsetMap();
    }
  }

Member Function Documentation

void FileInfo::createOffsetMap ( void  )

inlineprivate

Definition at line 213 of file pfm_gen_analysis.cpp.

  {
    std::string commandLine = "objdump -p " + NAME;
    PipeReader  objdump( commandLine.c_str() );
    std::string oldname;
    std::string suffix;
    int         vmbase  = 0;
    bool        matched = false;
    while ( objdump.output() ) {
      // Checks the following regexp
      //
      //    LOAD\\s+off\\s+(0x[0-9A-Fa-f]+)\\s+vaddr\\s+(0x[0-9A-Fa-f]+)
      //
      // and sets vmbase to be $2 - $1 of the first matched entry.

      std::string line;
      std::getline( objdump.output(), line );

      if ( !objdump.output() ) break;
      if ( line.empty() ) continue;
      const char* lineptr = line.c_str();
      if ( !skipWhitespaces( lineptr, &lineptr ) ) continue;
      if ( !skipString( "LOAD", lineptr, &lineptr ) ) continue;
      if ( !skipWhitespaces( lineptr, &lineptr ) ) continue;
      if ( !skipString( "off", lineptr, &lineptr ) ) continue;
      char* endptr      = 0;
      int   initialBase = strtol( lineptr, &endptr, 16 );
      if ( lineptr == endptr ) continue;
      lineptr = endptr;
      if ( !skipWhitespaces( lineptr, &lineptr ) ) continue;
      if ( !skipString( "vaddr", lineptr, &lineptr ) ) continue;
      if ( !skipWhitespaces( lineptr, &lineptr ) ) continue;
      int finalBase = strtol( lineptr, &endptr, 16 );
      if ( lineptr == endptr ) continue;
      vmbase  = finalBase - initialBase;
      matched = true;
      break;
    }
    if ( !matched ) {
      fprintf( stderr, "Cannot determine VM base address for %s\n", NAME.c_str() );
      fprintf( stderr, "Error while running `objdump -p %s`\n", NAME.c_str() );
      exit( 1 );
    }
    std::string commandLine2 = "nm -t d -n " + NAME;
    PipeReader  nm( commandLine2.c_str() );
    while ( nm.output() ) {
      std::string line;
      std::getline( nm.output(), line );
      if ( !nm.output() ) break;
      if ( line.empty() ) continue;
      // If line does not match "^(\\d+)[ ]\\S[ ](\S+)$", exit.
      const char* begin   = line.c_str();
      char*       endptr  = 0;
      int         address = strtol( begin, &endptr, 10 );
      if ( endptr == begin ) continue;
      if ( *endptr++ != ' ' ) continue;
      if ( isspace( *endptr++ ) ) continue;
      if ( *endptr++ != ' ' ) continue;
      char* symbolName = endptr;
      while ( *endptr && !isspace( *endptr ) ) endptr++;
      if ( *endptr != 0 ) continue;
      // If line starts with '.' forget about it.
      if ( symbolName[0] == '.' ) continue;
      // Create a new symbol with the given fileoffset.
      // The symbol is automatically saved in the FileInfo cache by offset.
      // If a symbol with the same offset is already there, the new one
      // replaces the old one.
      int offset = address - vmbase;
      if ( m_symbolCache.size() && ( m_symbolCache.back().OFFSET == offset ) )
        m_symbolCache.back().NAME = symbolName;
      else
        m_symbolCache.push_back( CacheItem( address - vmbase, symbolName ) );
    }
  }

Offset FileInfo::next ( Offset  offset )

inline

Definition at line 189 of file pfm_gen_analysis.cpp.

  {
    SymbolCache::iterator i = upper_bound( m_symbolCache.begin(), m_symbolCache.end(), offset, CacheItemComparator() );
    if ( i == m_symbolCache.end() ) {
      return 0;
    }
    return i->OFFSET;
  }

const char* FileInfo::symbolByOffset ( Offset  offset )

inline

Definition at line 169 of file pfm_gen_analysis.cpp.

  {
    if ( m_symbolCache.empty() ) {
      return 0;
    }

    SymbolCache::iterator i = lower_bound( m_symbolCache.begin(), m_symbolCache.end(), offset, CacheItemComparator() );
    if ( i->OFFSET == offset ) {
      return i->NAME.c_str();
    }

    if ( i == m_symbolCache.begin() ) {
      return m_symbolCache.begin()->NAME.c_str();
    }

    --i;

    return i->NAME.c_str();
  }

Member Data Documentation

SymbolCache FileInfo::m_symbolCache

private

Definition at line 206 of file pfm_gen_analysis.cpp.

std::string FileInfo::NAME

Definition at line 160 of file pfm_gen_analysis.cpp.

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The documentation for this class was generated from the following file:

• GaudiProfiling/src/app/pfm_gen_analysis.cpp