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 163 of file pfm_gen_analysis.cpp.

Member Typedef Documentation

typedef int FileInfo::Offset

Definition at line 166 of file pfm_gen_analysis.cpp.

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

private

Definition at line 218 of file pfm_gen_analysis.cpp.

Constructor & Destructor Documentation

FileInfo::FileInfo ( void  )

inline

Definition at line 168 of file pfm_gen_analysis.cpp.

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

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

inline

Definition at line 169 of file pfm_gen_analysis.cpp.

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

Member Function Documentation

void FileInfo::createOffsetMap ( void  )

inlineprivate

Definition at line 233 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 200 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 177 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 219 of file pfm_gen_analysis.cpp.

std::string FileInfo::NAME

Definition at line 167 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