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-// Copyright (c) 2006, 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: Satoru Takabayashi
-//
-// This library provides Symbolize() function that symbolizes program
-// counters to their corresponding symbol names on linux platforms.
-// This library has a minimal implementation of an ELF symbol table
-// reader (i.e. it doesn't depend on libelf, etc.).
-//
-// The algorithm used in Symbolize() is as follows.
-//
-//   1. Go through a list of maps in /proc/self/maps and find the map
-//   containing the program counter.
-//
-//   2. Open the mapped file and find a regular symbol table inside.
-//   Iterate over symbols in the symbol table and look for the symbol
-//   containing the program counter.  If such a symbol is found,
-//   obtain the symbol name, and demangle the symbol if possible.
-//   If the symbol isn't found in the regular symbol table (binary is
-//   stripped), try the same thing with a dynamic symbol table.
-//
-// Note that Symbolize() is originally implemented to be used in
-// FailureSignalHandler() in base/google.cc.  Hence it doesn't use
-// malloc() and other unsafe operations.  It should be both
-// thread-safe and async-signal-safe.
-
-#ifndef BASE_SYMBOLIZE_H_
-#define BASE_SYMBOLIZE_H_
-
-#include "utilities.h"
-#include "config.h"
-#include "glog/logging.h"
-
-#ifdef HAVE_SYMBOLIZE
-
-#if defined(__ELF__)  // defined by gcc
-#if defined(__OpenBSD__)
-#include <sys/exec_elf.h>
-#else
-#include <elf.h>
-#endif
-
-#if !defined(ANDROID)
-#include <link.h>  // For ElfW() macro.
-#endif
-
-// For systems where SIZEOF_VOID_P is not defined, determine it
-// based on __LP64__ (defined by gcc on 64-bit systems)
-#if !defined(SIZEOF_VOID_P)
-# if defined(__LP64__)
-#  define SIZEOF_VOID_P 8
-# else
-#  define SIZEOF_VOID_P 4
-# endif
-#endif
-
-// If there is no ElfW macro, let's define it by ourself.
-#ifndef ElfW
-# if SIZEOF_VOID_P == 4
-#  define ElfW(type) Elf32_##type
-# elif SIZEOF_VOID_P == 8
-#  define ElfW(type) Elf64_##type
-# else
-#  error "Unknown sizeof(void *)"
-# endif
-#endif
-
-_START_GOOGLE_NAMESPACE_
-
-// Gets the section header for the given name, if it exists. Returns true on
-// success. Otherwise, returns false.
-bool GetSectionHeaderByName(int fd, const char *name, size_t name_len,
-                            ElfW(Shdr) *out);
-
-_END_GOOGLE_NAMESPACE_
-
-#endif  /* __ELF__ */
-
-_START_GOOGLE_NAMESPACE_
-
-// Restrictions on the callbacks that follow:
-//  - The callbacks must not use heaps but only use stacks.
-//  - The callbacks must be async-signal-safe.
-
-// Installs a callback function, which will be called right before a symbol name
-// is printed. The callback is intended to be used for showing a file name and a
-// line number preceding a symbol name.
-// "fd" is a file descriptor of the object file containing the program
-// counter "pc". The callback function should write output to "out"
-// and return the size of the output written. On error, the callback
-// function should return -1.
-typedef int (*SymbolizeCallback)(int fd,
-                                 void* pc,
-                                 char* out,
-                                 size_t out_size,
-                                 uint64_t relocation);
-void InstallSymbolizeCallback(SymbolizeCallback callback);
-
-// Installs a callback function, which will be called instead of
-// OpenObjectFileContainingPcAndGetStartAddress.  The callback is expected
-// to searches for the object file (from /proc/self/maps) that contains
-// the specified pc.  If found, sets |start_address| to the start address
-// of where this object file is mapped in memory, sets the module base
-// address into |base_address|, copies the object file name into
-// |out_file_name|, and attempts to open the object file.  If the object
-// file is opened successfully, returns the file descriptor.  Otherwise,
-// returns -1.  |out_file_name_size| is the size of the file name buffer
-// (including the null-terminator).
-typedef int (*SymbolizeOpenObjectFileCallback)(uint64_t pc,
-                                               uint64_t& start_address,
-                                               uint64_t& base_address,
-                                               char* out_file_name,
-                                               int out_file_name_size);
-void InstallSymbolizeOpenObjectFileCallback(
-    SymbolizeOpenObjectFileCallback callback);
-
-_END_GOOGLE_NAMESPACE_
-
-#endif
-
-_START_GOOGLE_NAMESPACE_
-
-// Symbolizes a program counter.  On success, returns true and write the
-// symbol name to "out".  The symbol name is demangled if possible
-// (supports symbols generated by GCC 3.x or newer).  Otherwise,
-// returns false.
-GOOGLE_GLOG_DLL_DECL bool Symbolize(void *pc, char *out, int out_size);
-
-_END_GOOGLE_NAMESPACE_
-
-#endif  // BASE_SYMBOLIZE_H_