hphp/util/alloc-defs.h

   1 /*
   2    +----------------------------------------------------------------------+
   3    | HipHop for PHP                                                       |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 2010-present Facebook, Inc. (http://www.facebook.com)  |
   6    +----------------------------------------------------------------------+
   7    | This source file is subject to version 3.01 of the PHP license,      |
   8    | that is bundled with this package in the file LICENSE, and is        |
   9    | available through the world-wide-web at the following url:           |
  10    | http://www.php.net/license/3_01.txt                                  |
  11    | If you did not receive a copy of the PHP license and are unable to   |
  12    | obtain it through the world-wide-web, please send a note to          |
  13    | license@php.net so we can mail you a copy immediately.               |
  14    +----------------------------------------------------------------------+
  15 */
  16 #ifndef incl_HPHP_COMPILATION_ALLOC_FLAGS_H
  17 #define incl_HPHP_COMPILATION_ALLOC_FLAGS_H
  18
  19 #include <cstddef>
  20
  21 #include <folly/CPortability.h>
  22 #include "hphp/util/low-ptr-def.h"
  23
  24 #if FOLLY_SANITIZE
  25 // ASan is less precise than valgrind so we'll need a superset of those tweaks
  26 #  define VALGRIND
  27 // TODO: (t2869817) ASan doesn't play well with jemalloc
  28 #  ifdef USE_JEMALLOC
  29 #    undef USE_JEMALLOC
  30 #  endif
  31 #endif
  32
  33 #ifdef USE_JEMALLOC
  34 #include <jemalloc/jemalloc.h>
  35 #  if (JEMALLOC_VERSION_MAJOR >= 5) && defined(USE_LOWPTR) && \
  36   defined(__linux__) && !defined(USE_JEMALLOC_EXTENT_HOOKS)
  37 #    define USE_JEMALLOC_EXTENT_HOOKS 1
  38 #  endif
  39 #  if USE_JEMALLOC_EXTENT_HOOKS
  40 #    if (JEMALLOC_VERSION_MAJOR > 5) || (JEMALLOC_VERSION_MINOR >= 1)
  41 #       define JEMALLOC_METADATA_1G_PAGES 1
  42 #    endif
  43 #  endif
  44 #  if (JEMALLOC_VERSION_MAJOR > 4)
  45 #    define JEMALLOC_NEW_ARENA_CMD "arenas.create"
  46 #  else
  47 #    define JEMALLOC_NEW_ARENA_CMD "arenas.extend"
  48 #  endif
  49 #endif
  50
  51 namespace HPHP {
  52 constexpr bool use_jemalloc =
  53 #ifdef USE_JEMALLOC
  54   true
  55 #else
  56   false
  57 #endif
  58   ;
  59
  60 // When we have control over the virtual address space for the heap, all
  61 // static/uncounted strings/arrays have addresses lower than kUncountedMaxAddr,
  62 // and all counted HeapObjects have higher addresses.
  63 constexpr bool addr_encodes_persistency =
  64 #if USE_JEMALLOC_EXTENT_HOOKS && defined(__x86_64__) && defined(__linux__)
  65   true
  66 #else
  67   false
  68 #endif
  69   ;
  70
  71 // ASAN modifies the generated code in ways that cause abnormally high C++
  72 // stack usage.
  73 constexpr size_t kStackSizeMinimum =
  74 #if FOLLY_SANITIZE
  75   16 << 20;
  76 #else
  77   8 << 20;
  78 #endif
  79
  80 extern const size_t s_pageSize;
  81
  82 }
  83
  84 #endif