1    :  // Copyright 2015 Google Inc. All Rights Reserved.
   2    :  //
   3    :  // Licensed under the Apache License, Version 2.0 (the "License");
   4    :  // you may not use this file except in compliance with the License.
   5    :  // You may obtain a copy of the License at
   6    :  //
   7    :  //     http://www.apache.org/licenses/LICENSE-2.0
   8    :  //
   9    :  // Unless required by applicable law or agreed to in writing, software
  10    :  // distributed under the License is distributed on an "AS IS" BASIS,
  11    :  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12    :  // See the License for the specific language governing permissions and
  13    :  // limitations under the License.
  14    :  
  15    :  #include "syzygy/bard/events/heap_alloc_event.h"
  16    :  
  17    :  #include "syzygy/bard/backdrops/heap_backdrop.h"
  18    :  #include "syzygy/trace/common/clock.h"
  19    :  
  20    :  namespace bard {
  21    :  namespace events {
  22    :  
  23    :  HeapAllocEvent::HeapAllocEvent(HANDLE trace_heap,
  24    :                                 DWORD flags,
  25    :                                 SIZE_T bytes,
  26    :                                 LPVOID trace_alloc)
  27    :      : trace_heap_(trace_heap),
  28    :        flags_(flags),
  29    :        bytes_(bytes),
  30  E :        trace_alloc_(trace_alloc) {
  31  E :  }
  32    :  
  33    :  bool HeapAllocEvent::Save(const EventInterface* const event,
  34  E :                            core::OutArchive* out_archive) {
  35  E :    DCHECK_NE(static_cast<EventInterface*>(nullptr), event);
  36  E :    DCHECK_NE(static_cast<core::OutArchive*>(nullptr), out_archive);
  37    :  
  38    :    const HeapAllocEvent* derived_event =
  39  E :        reinterpret_cast<const HeapAllocEvent*>(event);
  40    :  
  41    :    return out_archive->Save(
  42    :               reinterpret_cast<uintptr_t>(derived_event->trace_heap_)) &&
  43    :           out_archive->Save(derived_event->flags_) &&
  44    :           out_archive->Save(derived_event->bytes_) &&
  45    :           out_archive->Save(
  46  E :              reinterpret_cast<uintptr_t>(derived_event->trace_alloc_));
  47  E :  }
  48    :  
  49    :  scoped_ptr<HeapAllocEvent> HeapAllocEvent::Load(
  50  E :      core::InArchive* in_archive) {
  51  E :    DCHECK_NE(static_cast<core::InArchive*>(nullptr), in_archive);
  52    :  
  53    :    uintptr_t trace_heap;
  54    :    DWORD flags;
  55    :    SIZE_T bytes;
  56    :    uintptr_t trace_alloc;
  57    :    if (in_archive->Load(&trace_heap) &&
  58    :        in_archive->Load(&flags) &&
  59    :        in_archive->Load(&bytes) &&
  60  E :        in_archive->Load(&trace_alloc)) {
  61    :      return scoped_ptr<HeapAllocEvent>(
  62    :          new HeapAllocEvent(reinterpret_cast<HANDLE>(trace_heap),
  63    :                             flags,
  64    :                             bytes,
  65  E :                             reinterpret_cast<LPVOID>(trace_alloc)));
  66    :    }
  67  i :    return nullptr;
  68  E :  }
  69    :  
  70  E :  bool HeapAllocEvent::Play(void* backdrop) {
  71  E :    DCHECK_NE(static_cast<void*>(nullptr), backdrop);
  72    :  
  73    :    using bard::backdrops::HeapBackdrop;
  74  E :    HeapBackdrop* heap_backdrop = reinterpret_cast<HeapBackdrop*>(backdrop);
  75    :  
  76  E :    HANDLE live_heap = INVALID_HANDLE_VALUE;
  77    :  
  78  E :    if (!heap_backdrop->heap_map().GetLiveFromTrace(trace_heap_, &live_heap))
  79  i :      return false;
  80    :  
  81  E :    uint64_t t0 = ::trace::common::GetTsc();
  82  E :    LPVOID live_alloc = heap_backdrop->HeapAlloc(live_heap, flags_, bytes_);
  83  E :    uint64_t t1 = ::trace::common::GetTsc();
  84    :  
  85  E :    if (!live_alloc && trace_alloc_) {
  86  E :      LOG(ERROR) << "HeapAlloc failed to allocate memory.";
  87  E :      return false;
  88    :    }
  89    :  
  90  E :    if (live_alloc) {
  91  E :      if (!trace_alloc_) {
  92    :        // No need to keep this allocation if it failed in the trace file.
  93  i :        heap_backdrop->HeapFree(live_heap, flags_, live_alloc);
  94  i :      } else if (!heap_backdrop->alloc_map().AddMapping(trace_alloc_,
  95  E :                                                        live_alloc)) {
  96  i :        return false;
  97    :      }
  98    :    }
  99    :  
 100  E :    heap_backdrop->UpdateStats(type(), t1 - t0);
 101    :  
 102  E :    return true;
 103  E :  }
 104    :  
 105  E :  bool HeapAllocEvent::Equals(const EventInterface* rhs) const {
 106  E :    DCHECK_NE(static_cast<EventInterface*>(nullptr), rhs);
 107    :  
 108  E :    if (rhs->type() != kHeapAllocEvent)
 109  i :      return false;
 110    :  
 111  E :    const auto e = reinterpret_cast<const HeapAllocEvent*>(rhs);
 112    :    if (trace_heap_ != e->trace_heap_ || flags_ != e->flags_ ||
 113  E :        bytes_ != e->bytes_ || trace_alloc_ != e->trace_alloc_) {
 114  E :      return false;
 115    :    }
 116    :  
 117  E :    return true;
 118  E :  }
 119    :  
 120    :  }  // namespace events
 121    :  }  // namespace bard