// Copyright (c) 2009, Google Inc.
// All rights reserved.
//
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// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
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//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// ---
// Author: Craig Silverstein
#ifndef TCMALLOC_SYMBOLIZE_H_
#define TCMALLOC_SYMBOLIZE_H_
#include "config.h"
#ifdef HAVE_STDINT_H
#include <stdint.h> // for uintptr_t
#endif
#include <stddef.h> // for NULL
#include <map>
using std::map;
// SymbolTable encapsulates the address operations necessary for stack trace
// symbolization. A common use-case is to Add() the addresses from one or
// several stack traces to a table, call Symbolize() once and use GetSymbol()
// to get the symbol names for pretty-printing the stack traces.
class SymbolTable {
public:
SymbolTable()
: symbol_buffer_(NULL) {}
~SymbolTable() {
delete[] symbol_buffer_;
}
// Adds an address to the table. This may overwrite a currently known symbol
// name, so Add() should not generally be called after Symbolize().
void Add(const void* addr);
// Returns the symbol name for addr, if the given address was added before
// the last successful call to Symbolize(). Otherwise may return an empty
// c-string.
const char* GetSymbol(const void* addr);
// Obtains the symbol names for the addresses stored in the table and returns
// the number of addresses actually symbolized.
int Symbolize();
private:
typedef map<const void*, const char*> SymbolMap;
// An average size of memory allocated for a stack trace symbol.
static const int kSymbolSize = 1024;
// Map from addresses to symbol names.
SymbolMap symbolization_table_;
// Pointer to the buffer that stores the symbol names.
char *symbol_buffer_;
};
#endif // TCMALLOC_SYMBOLIZE_H_