Adds TCMalloc support for Android.

third_party/tcmalloc/chromium/src/base/sysinfo.cc

 // Copyright (c) 2006, Google Inc.
 // All rights reserved.
-// 
+//

[Dai Mikurube (NOT FULLTIME), 2013/05/03 08:53:00]

nit: unnecessary whitespace deletion

[bulach, 2013/05/07 14:55:51]

Done.

 // 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
@@ skipping 468 matching lines @@
 
 // ----------------------------------------------------------------------
 // HasPosixThreads()
 //      Return true if we're running POSIX (e.g., NPTL on Linux)
 //      threads, as opposed to a non-POSIX thread libary.  The thing
 //      that we care about is whether a thread's pid is the same as
 //      the thread that spawned it.  If so, this function returns
 //      true.
 // ----------------------------------------------------------------------
 bool HasPosixThreads() {
-#if defined(__linux__)
+#if defined(__linux__) && !defined(__ANDROID__)

[Dai Mikurube (NOT FULLTIME), 2013/05/03 08:53:00]

just curious.  what happens without this?

[bulach, 2013/05/07 14:55:51]

'confstr' was not declared in this scope.
I suppose that pthread.h is what it's meant by "POSIX thread" here?

[Dai Mikurube (NOT FULLTIME), 2013/05/08 14:53:25]

I think so.  Then, yes, we should return true on Android like this.

+ a comment on the patch set 6.

 #ifndef _CS_GNU_LIBPTHREAD_VERSION
 #define _CS_GNU_LIBPTHREAD_VERSION 3
 #endif
   char buf[32];
   //  We assume that, if confstr() doesn't know about this name, then
   //  the same glibc is providing LinuxThreads.
   if (confstr(_CS_GNU_LIBPTHREAD_VERSION, buf, sizeof(buf)) == 0)
     return false;
   return strncmp(buf, "NPTL", 4) == 0;
 #elif defined(PLATFORM_WINDOWS) || defined(__CYGWIN__) || defined(__CYGWIN32__)
@@ skipping 614 matching lines @@
   ProcMapsIterator::Buffer linebuf;
   while (it.Next(&start, &end, &flags, &offset, &inode, &filename)) {
     int written = it.FormatLine(linebuf.buf_, sizeof(linebuf.buf_),
                                 start, end, flags, offset, inode, filename,
                                 0);
     RawWrite(fd, linebuf.buf_, written);
   }
 }
 
 }  // namespace tcmalloc