Update the tcmalloc chromium branch to r144 (gperftools 2.0), and merge chromium-specific changes.

third_party/tcmalloc/chromium/src/libc_override_redefine.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.
+
+// ---
+// Author: Craig Silverstein <opensource@google.com>
+//
+// Used on systems that don't have their own definition of
+// malloc/new/etc.  (Typically this will be a windows msvcrt.dll that
+// has been edited to remove the definitions.)  We can just define our
+// own as normal functions.
+//
+// This should also work on systems were all the malloc routines are
+// defined as weak symbols, and there's no support for aliasing.
+
+#ifndef TCMALLOC_LIBC_OVERRIDE_REDEFINE_H_
+#define TCMALLOC_LIBC_OVERRIDE_REDEFINE_H_
+
+#ifdef HAVE_SYS_CDEFS_H
+#include <sys/cdefs.h>    // for __THROW
+#endif
+
+#ifndef __THROW    // I guess we're not on a glibc-like system
+# define __THROW   // __THROW is just an optimization, so ok to make it ""
+#endif
+
+void* operator new(size_t size)                  { return tc_new(size);       }
+void operator delete(void* p) __THROW            { tc_delete(p);              }
+void* operator new[](size_t size)                { return tc_newarray(size);  }
+void operator delete[](void* p) __THROW          { tc_deletearray(p);         }
+void* operator new(size_t size, const std::nothrow_t& nt) __THROW {
+  return tc_new_nothrow(size, nt);
+}
+void* operator new[](size_t size, const std::nothrow_t& nt) __THROW {
+  return tc_newarray_nothrow(size, nt);
+}
+void operator delete(void* ptr, const std::nothrow_t& nt) __THROW {
+  return tc_delete_nothrow(ptr, nt);
+}
+void operator delete[](void* ptr, const std::nothrow_t& nt) __THROW {
+  return tc_deletearray_nothrow(ptr, nt);
+}
+extern "C" {
+  void* malloc(size_t s) __THROW                 { return tc_malloc(s);       }
+  void  free(void* p) __THROW                    { tc_free(p);                }
+  void* realloc(void* p, size_t s) __THROW       { return tc_realloc(p, s);   }
+  void* calloc(size_t n, size_t s) __THROW       { return tc_calloc(n, s);    }
+  void  cfree(void* p) __THROW                   { tc_cfree(p);               }
+  void* memalign(size_t a, size_t s) __THROW     { return tc_memalign(a, s);  }
+  void* valloc(size_t s) __THROW                 { return tc_valloc(s);       }
+  void* pvalloc(size_t s) __THROW                { return tc_pvalloc(s);      }
+  int posix_memalign(void** r, size_t a, size_t s) __THROW {
+    return tc_posix_memalign(r, a, s);
+  }
+  void malloc_stats(void) __THROW                { tc_malloc_stats();         }
+  int mallopt(int cmd, int v) __THROW            { return tc_mallopt(cmd, v); }
+#ifdef HAVE_STRUCT_MALLINFO
+  struct mallinfo mallinfo(void) __THROW         { return tc_mallinfo();      }
+#endif
+  size_t malloc_size(void* p) __THROW            { return tc_malloc_size(p); }
+  size_t malloc_usable_size(void* p) __THROW     { return tc_malloc_size(p); }
+}  // extern "C"
+
+// No need to do anything at tcmalloc-registration time: we do it all
+// via overriding weak symbols (at link time).
+static void ReplaceSystemAlloc() { }
+
+#endif  // TCMALLOC_LIBC_OVERRIDE_REDEFINE_H_