hphp/runtime/vm/property-profile.cpp

   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
  17 #include "hphp/runtime/vm/property-profile.h"
  18
  19 #include <atomic>
  20 #include <cinttypes>
  21 #include <tbb/concurrent_hash_map.h>
  22
  23 #include "hphp/runtime/base/string-functors.h"
  24 #include "hphp/util/trace.h"
  25 #include "hphp/runtime/vm/class.h"
  26 #include "hphp/runtime/vm/jit/prof-data-serialize.h"
  27
  28 namespace HPHP { namespace PropertyProfile {
  29
  30 //////////////////////////////////////////////////////////////////////
  31
  32 namespace {
  33
  34 TRACE_SET_MOD(prof_prop);
  35
  36 using ClassMethodPair = std::pair<const StringData*, const StringData*>;
  37
  38 using PropertyCounts = tbb::concurrent_hash_map<
  39   ClassMethodPair,
  40   uint32_t,
  41   StringDataPairHashICompare
  42 >;
  43
  44 PropertyCounts s_counts;
  45
  46 }
  47
  48 //////////////////////////////////////////////////////////////////////
  49
  50 void incCount(const StringData* cls, const StringData* prop) {
  51   auto fullName = ClassMethodPair(cls, prop);
  52
  53   PropertyCounts::accessor acc;
  54   if (!s_counts.insert(acc, PropertyCounts::value_type(fullName, 1))) {
  55     acc->second++;
  56   }
  57 }
  58
  59 uint32_t getCount(const StringData* cls, const StringData* prop) {
  60   auto fullName = ClassMethodPair(cls, prop);
  61
  62   PropertyCounts::accessor acc;
  63   if (s_counts.find(acc, fullName)) return acc->second;
  64   return 0;
  65 }
  66
  67 void serialize(jit::ProfDataSerializer& ser) {
  68   write_raw(ser, s_counts.size());
  69   FTRACE(1, "PropertyProfile::serialize ({} entries):\n", s_counts.size());
  70   for (auto const& elm : s_counts) {
  71     FTRACE(1, "  {}::{} = {}\n",
  72            elm.first.first->data(), elm.first.second->data(), elm.second);
  73     write_string(ser, elm.first.first);
  74     write_string(ser, elm.first.second);
  75     write_raw(ser, elm.second);
  76   }
  77 }
  78
  79 void deserialize(jit::ProfDataDeserializer& ser) {
  80   size_t elems;
  81   read_raw(ser, elems);
  82   FTRACE(1, "PropertyProfile::deserialize ({} entries):\n", elems);
  83   while (elems--) {
  84     auto const clsName = read_string(ser);
  85     auto const propName = read_string(ser);
  86     auto const fullName = ClassMethodPair(clsName, propName);
  87     uint32_t count;
  88     read_raw(ser, count);
  89     FTRACE(1, "  {}::{} = {}\n", clsName->data(), propName->data(), count);
  90     PropertyCounts::accessor acc;
  91     if (!s_counts.insert(acc, PropertyCounts::value_type(fullName, count))) {
  92       always_assert_flog(
  93         0, "found duplicate entry while deserializing PropertyProfile"
  94       );
  95     }
  96   }
  97 }
  98
  99 //////////////////////////////////////////////////////////////////////
 100
 101 }}