Revert 126020 - Experiment for updating the tcmalloc chromium branch to r144 (gperftools 2.0).

third_party/tcmalloc/chromium/src/malloc_hook_mmap_linux.h

Index: third_party/tcmalloc/chromium/src/malloc_hook_mmap_linux.h
===================================================================
--- third_party/tcmalloc/chromium/src/malloc_hook_mmap_linux.h	(revision 126022)
+++ third_party/tcmalloc/chromium/src/malloc_hook_mmap_linux.h	(working copy)
@@ -1,241 +0,0 @@
-// Copyright (c) 2005, 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: Sanjay Ghemawat <opensource@google.com>
-
-// We define mmap() and mmap64(), which somewhat reimplements libc's mmap
-// syscall stubs.  Unfortunately libc only exports the stubs via weak symbols
-// (which we're overriding with our mmap64() and mmap() wrappers) so we can't
-// just call through to them.
-
-#ifndef __linux
-# error Should only be including malloc_hook_mmap_linux.h on linux systems.
-#endif
-
-#include <unistd.h>
-#include <syscall.h>
-#include <sys/mman.h>
-#include <errno.h>
-#include "base/linux_syscall_support.h"
-
-// The x86-32 case and the x86-64 case differ:
-// 32b has a mmap2() syscall, 64b does not.
-// 64b and 32b have different calling conventions for mmap().
-
-// I test for 64-bit first so I don't have to do things like
-// '#if (defined(__mips__) && !defined(__MIPS64__))' as a mips32 check.
-#if defined(__x86_64__) || defined(__PPC64__) || (defined(_MIPS_SIM) && _MIPS_SIM == _ABI64)
-
-static inline void* do_mmap64(void *start, size_t length,
-                              int prot, int flags,
-                              int fd, __off64_t offset) __THROW {
-  // The original gperftools uses sys_mmap() here.  But, it is not allowed by
-  // Chromium's sandbox.
-  return (void *)syscall(SYS_mmap, start, length, prot, flags, fd, offset);
-}
-
-#define MALLOC_HOOK_HAVE_DO_MMAP64 1
-
-#elif defined(__i386__) || defined(__PPC__) || defined(__mips__) || \
-      defined(__arm__)
-
-static inline void* do_mmap64(void *start, size_t length,
-                              int prot, int flags,
-                              int fd, __off64_t offset) __THROW {
-  void *result;
-
-  // Try mmap2() unless it's not supported
-  static bool have_mmap2 = true;
-  if (have_mmap2) {
-    static int pagesize = 0;
-    if (!pagesize) pagesize = getpagesize();
-
-    // Check that the offset is page aligned
-    if (offset & (pagesize - 1)) {
-      result = MAP_FAILED;
-      errno = EINVAL;
-      goto out;
-    }
-
-    result = (void *)syscall(SYS_mmap2,
-                             start, length, prot, flags, fd,
-                             (off_t) (offset / pagesize));
-    if (result != MAP_FAILED || errno != ENOSYS)  goto out;
-
-    // We don't have mmap2() after all - don't bother trying it in future
-    have_mmap2 = false;
-  }
-
-  if (((off_t)offset) != offset) {
-    // If we're trying to map a 64-bit offset, fail now since we don't
-    // have 64-bit mmap() support.
-    result = MAP_FAILED;
-    errno = EINVAL;
-    goto out;
-  }
-
-#ifdef __NR_mmap
-  {
-    // Fall back to old 32-bit offset mmap() call
-    // Old syscall interface cannot handle six args, so pass in an array
-    int32 args[6] = { (int32) start, (int32) length, prot, flags, fd,
-                      (off_t) offset };
-    result = (void *)syscall(SYS_mmap, args);
-  }
-#else
-  // Some Linux ports like ARM EABI Linux has no mmap, just mmap2.
-  result = MAP_FAILED;
-#endif
-
- out:
-  return result;
-}
-
-#define MALLOC_HOOK_HAVE_DO_MMAP64 1
-
-#endif  // #if defined(__x86_64__)
-
-
-#ifdef MALLOC_HOOK_HAVE_DO_MMAP64
-
-// We use do_mmap64 abstraction to put MallocHook::InvokeMmapHook
-// calls right into mmap and mmap64, so that the stack frames in the caller's
-// stack are at the same offsets for all the calls of memory allocating
-// functions.
-
-// Put all callers of MallocHook::Invoke* in this module into
-// malloc_hook section,
-// so that MallocHook::GetCallerStackTrace can function accurately:
-
-// Make sure mmap doesn't get #define'd away by <sys/mman.h>
-# undef mmap
-
-extern "C" {
-  void* mmap64(void *start, size_t length, int prot, int flags,
-               int fd, __off64_t offset  ) __THROW
-    ATTRIBUTE_SECTION(malloc_hook);
-  void* mmap(void *start, size_t length,int prot, int flags,
-             int fd, off_t offset) __THROW
-    ATTRIBUTE_SECTION(malloc_hook);
-  int munmap(void* start, size_t length) __THROW
-    ATTRIBUTE_SECTION(malloc_hook);
-  void* mremap(void* old_addr, size_t old_size, size_t new_size,
-               int flags, ...) __THROW
-    ATTRIBUTE_SECTION(malloc_hook);
-  void* sbrk(ptrdiff_t increment) __THROW
-    ATTRIBUTE_SECTION(malloc_hook);
-}
-
-extern "C" void* mmap64(void *start, size_t length, int prot, int flags,
-                        int fd, __off64_t offset) __THROW {
-  MallocHook::InvokePreMmapHook(start, length, prot, flags, fd, offset);
-  void *result;
-  if (!MallocHook::InvokeMmapReplacement(
-          start, length, prot, flags, fd, offset, &result)) {
-    result = do_mmap64(start, length, prot, flags, fd, offset);
-  }
-  MallocHook::InvokeMmapHook(result, start, length, prot, flags, fd, offset);
-  return result;
-}
-
-# if !defined(__USE_FILE_OFFSET64) || !defined(__REDIRECT_NTH)
-
-extern "C" void* mmap(void *start, size_t length, int prot, int flags,
-                      int fd, off_t offset) __THROW {
-  MallocHook::InvokePreMmapHook(start, length, prot, flags, fd, offset);
-  void *result;
-  if (!MallocHook::InvokeMmapReplacement(
-          start, length, prot, flags, fd, offset, &result)) {
-    result = do_mmap64(start, length, prot, flags, fd,
-                       static_cast<size_t>(offset)); // avoid sign extension
-  }
-  MallocHook::InvokeMmapHook(result, start, length, prot, flags, fd, offset);
-  return result;
-}
-
-# endif  // !defined(__USE_FILE_OFFSET64) || !defined(__REDIRECT_NTH)
-
-extern "C" int munmap(void* start, size_t length) __THROW {
-  MallocHook::InvokeMunmapHook(start, length);
-  int result;
-  if (!MallocHook::InvokeMunmapReplacement(start, length, &result)) {
-    // The original gperftools uses sys_munmap() here.  But, it is not allowed
-    // by Chromium's sandbox.
-    result = syscall(SYS_munmap, start, length);
-  }
-  return result;
-}
-
-extern "C" void* mremap(void* old_addr, size_t old_size, size_t new_size,
-                        int flags, ...) __THROW {
-  va_list ap;
-  va_start(ap, flags);
-  void *new_address = va_arg(ap, void *);
-  va_end(ap);
-  // The original gperftools uses sys_mremap() here.  But, it is not allowed by
-  // Chromium's sandbox.
-  void* result = (void *)syscall(
-      SYS_mremap, old_addr, old_size, new_size, flags, new_address);
-  MallocHook::InvokeMremapHook(result, old_addr, old_size, new_size, flags,
-                               new_address);
-  return result;
-}
-
-// libc's version:
-extern "C" void* __sbrk(ptrdiff_t increment);
-
-extern "C" void* sbrk(ptrdiff_t increment) __THROW {
-  MallocHook::InvokePreSbrkHook(increment);
-  void *result = __sbrk(increment);
-  MallocHook::InvokeSbrkHook(result, increment);
-  return result;
-}
-
-/*static*/void* MallocHook::UnhookedMMap(void *start, size_t length, int prot,
-                                         int flags, int fd, off_t offset) {
-  void* result;
-  if (!MallocHook::InvokeMmapReplacement(
-          start, length, prot, flags, fd, offset, &result)) {
-    result = do_mmap64(start, length, prot, flags, fd, offset);
-  }
-  return result;
-}
-
-/*static*/int MallocHook::UnhookedMUnmap(void *start, size_t length) {
-  int result;
-  if (!MallocHook::InvokeMunmapReplacement(start, length, &result)) {
-    result = syscall(SYS_munmap, start, length);
-  }
-  return result;
-}
-
-#undef MALLOC_HOOK_HAVE_DO_MMAP64
-
-#endif  // #ifdef MALLOC_HOOK_HAVE_DO_MMAP64