Squashed 'third_party/gperftools/' content from commit 54505f1
Change-Id: Id02e833828732b0efe7dac722b8485279e67c5fa
git-subtree-dir: third_party/gperftools
git-subtree-split: 54505f1d50c2d1f4676f5e87090b64a117fd980e
diff --git a/src/symbolize.h b/src/symbolize.h
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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_;
+};
+
+#endif // TCMALLOC_SYMBOLIZE_H_