Index: third_party/tcmalloc/chromium/src/base/elf_mem_image.h |
=================================================================== |
--- third_party/tcmalloc/chromium/src/base/elf_mem_image.h (revision 124832) |
+++ third_party/tcmalloc/chromium/src/base/elf_mem_image.h (working copy) |
@@ -1,134 +0,0 @@ |
-// Copyright (c) 2008, 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: Paul Pluzhnikov |
-// |
-// Allow dynamic symbol lookup for in-memory Elf images. |
- |
-#ifndef BASE_ELF_MEM_IMAGE_H_ |
-#define BASE_ELF_MEM_IMAGE_H_ |
- |
-#include <config.h> |
-#ifdef HAVE_FEATURES_H |
-#include <features.h> // for __GLIBC__ |
-#endif |
- |
-// Maybe one day we can rewrite this file not to require the elf |
-// symbol extensions in glibc, but for right now we need them. |
-#if defined(__ELF__) && defined(__GLIBC__) && !defined(__native_client__) |
- |
-#define HAVE_ELF_MEM_IMAGE 1 |
- |
-#include <stdlib.h> |
-#include <link.h> // for ElfW |
- |
-namespace base { |
- |
-// An in-memory ELF image (may not exist on disk). |
-class ElfMemImage { |
- public: |
- // Sentinel: there could never be an elf image at this address. |
- static const void *const kInvalidBase; |
- |
- // Information about a single vdso symbol. |
- // All pointers are into .dynsym, .dynstr, or .text of the VDSO. |
- // Do not free() them or modify through them. |
- struct SymbolInfo { |
- const char *name; // E.g. "__vdso_getcpu" |
- const char *version; // E.g. "LINUX_2.6", could be "" |
- // for unversioned symbol. |
- const void *address; // Relocated symbol address. |
- const ElfW(Sym) *symbol; // Symbol in the dynamic symbol table. |
- }; |
- |
- // Supports iteration over all dynamic symbols. |
- class SymbolIterator { |
- public: |
- friend class ElfMemImage; |
- const SymbolInfo *operator->() const; |
- const SymbolInfo &operator*() const; |
- SymbolIterator& operator++(); |
- bool operator!=(const SymbolIterator &rhs) const; |
- bool operator==(const SymbolIterator &rhs) const; |
- private: |
- SymbolIterator(const void *const image, int index); |
- void Update(int incr); |
- SymbolInfo info_; |
- int index_; |
- const void *const image_; |
- }; |
- |
- |
- explicit ElfMemImage(const void *base); |
- void Init(const void *base); |
- bool IsPresent() const { return ehdr_ != NULL; } |
- const ElfW(Phdr)* GetPhdr(int index) const; |
- const ElfW(Sym)* GetDynsym(int index) const; |
- const ElfW(Versym)* GetVersym(int index) const; |
- const ElfW(Verdef)* GetVerdef(int index) const; |
- const ElfW(Verdaux)* GetVerdefAux(const ElfW(Verdef) *verdef) const; |
- const char* GetDynstr(ElfW(Word) offset) const; |
- const void* GetSymAddr(const ElfW(Sym) *sym) const; |
- const char* GetVerstr(ElfW(Word) offset) const; |
- int GetNumSymbols() const; |
- |
- SymbolIterator begin() const; |
- SymbolIterator end() const; |
- |
- // Look up versioned dynamic symbol in the image. |
- // Returns false if image is not present, or doesn't contain given |
- // symbol/version/type combination. |
- // If info_out != NULL, additional details are filled in. |
- bool LookupSymbol(const char *name, const char *version, |
- int symbol_type, SymbolInfo *info_out) const; |
- |
- // Find info about symbol (if any) which overlaps given address. |
- // Returns true if symbol was found; false if image isn't present |
- // or doesn't have a symbol overlapping given address. |
- // If info_out != NULL, additional details are filled in. |
- bool LookupSymbolByAddress(const void *address, SymbolInfo *info_out) const; |
- |
- private: |
- const ElfW(Ehdr) *ehdr_; |
- const ElfW(Sym) *dynsym_; |
- const ElfW(Versym) *versym_; |
- const ElfW(Verdef) *verdef_; |
- const ElfW(Word) *hash_; |
- const char *dynstr_; |
- size_t strsize_; |
- size_t verdefnum_; |
- ElfW(Addr) link_base_; // Link-time base (p_vaddr of first PT_LOAD). |
-}; |
- |
-} // namespace base |
- |
-#endif // __ELF__ and __GLIBC__ and !__native_client__ |
- |
-#endif // BASE_ELF_MEM_IMAGE_H_ |