Update the tcmalloc vendor branch to r111 (perftools version 1.8)

third_party/tcmalloc/vendor/src/malloc_hook_mmap_freebsd.h

+// Copyright (c) 2011, 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.
+
+// Override mmap/munmap/mremap/sbrk to provide support for calling the
+// related hooks (in addition, of course, to doing what these
+// functions normally do).
+
+#ifndef __FreeBSD__
+# error Should only be including malloc_hook_mmap_freebsd.h on FreeBSD systems.
+#endif
+
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <sys/mman.h>
+#include <errno.h>
+
+static inline void* do_mmap(void *start, size_t length,
+                            int prot, int flags,
+                            int fd, off_t offset) __THROW {
+  return (void *)syscall(SYS_mmap, start, length, prot, flags, fd, offset);
+}
+
+// Make sure mmap doesn't get #define'd away by <sys/mman.h>
+#undef mmap
+
+extern "C" {
+  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* sbrk(intptr_t increment) __THROW
+    ATTRIBUTE_SECTION(malloc_hook);
+}
+
+static inline void* do_sbrk(intptr_t increment) {
+  void* curbrk;
+
+  __asm__ __volatile__(
+      "movl .curbrk, %%eax;"
+      "movl %%eax, %0"
+      : "=r" (curbrk)
+      :: "%eax");
+
+  char* prevbrk = static_cast<char*>(curbrk);
+  void* newbrk = prevbrk + increment;
+
+  if (brk(newbrk) == -1) {
+    assert(0);
+    return reinterpret_cast<void*>(static_cast<intptr_t>(-1));
+  }
+
+  return prevbrk;
+}
+
+
+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 = do_mmap(start, length, prot, flags, fd,
+                         static_cast<size_t>(offset)); // avoid sign extension
+  MallocHook::InvokeMmapHook(result, start, length, prot, flags, fd, offset);
+  return result;
+}
+
+extern "C" int munmap(void* start, size_t length) __THROW {
+  MallocHook::InvokeMunmapHook(start, length);
+  return syscall(SYS_munmap, start, length);
+}
+
+extern "C" void* sbrk(intptr_t increment) __THROW {
+  MallocHook::InvokePreSbrkHook(increment);
+  void *result = do_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) {
+  return mmap(start, length, prot, flags, fd, offset);
+}
+
+/*static*/int MallocHook::UnhookedMUnmap(void *start, size_t length) {
+  return munmap(start, length);
+}