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- // -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*-
- // Copyright (c) 2009, Google Inc.
- // All rights reserved.
- //
- // Redistribution and use in source and binary forms, with or without
- // 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.
- // * Neither the name of Google Inc. nor the names of its
- // contributors may be used to endorse or promote products derived from
- // this software without specific prior written permission.
- //
- // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- // 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,
- // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- // 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_;
- #ifdef TCMALLOC_SGX
- SymbolTable(const SymbolTable& src) { }
- SymbolTable& operator=(const SymbolTable&) { return *this; }
- #endif
- };
- #endif // TCMALLOC_SYMBOLIZE_H_
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