Cleanup app snapshots on isolate/vm exit.

runtime/bin/file_win.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_WINDOWS)
 
 #include "bin/file.h"
 
 #include <fcntl.h>     // NOLINT
@@ skipping 57 matching lines @@
 intptr_t File::GetFD() {
   return handle_->fd();
 }
 
 
 bool File::IsClosed() {
   return handle_->fd() == kClosedFd;
 }
 
 
-void* File::Map(File::MapType type, int64_t position, int64_t length) {
+MappedMemory* File::Map(File::MapType type, int64_t position, int64_t length) {
   DWORD prot_alloc;
   DWORD prot_final;
   switch (type) {
     case File::kReadOnly:
       prot_alloc = PAGE_READWRITE;
       prot_final = PAGE_READONLY;
       break;
     case File::kReadExecute:
       prot_alloc = PAGE_EXECUTE_READWRITE;
       prot_final = PAGE_EXECUTE_READ;
@@ skipping 15 matching lines @@
     return NULL;
   }
 
   DWORD old_prot;
   bool result = VirtualProtect(addr, length, prot_final, &old_prot);
   if (!result) {
     Log::PrintErr("VirtualProtect failed %d\n", GetLastError());
     VirtualFree(addr, 0, MEM_RELEASE);
     return NULL;
   }
-  return addr;
+  return new MappedMemory(addr, length);
 }
 
 
+void MappedMemory::Unmap() {
+  bool result = VirtualFree(address_, size_, MEM_RELEASE);
+  ASSERT(result);
+  address_ = 0;
+  size_ = 0;
+}
+
+
 int64_t File::Read(void* buffer, int64_t num_bytes) {
   ASSERT(handle_->fd() >= 0);
   return read(handle_->fd(), buffer, num_bytes);
 }
 
 
 int64_t File::Write(const void* buffer, int64_t num_bytes) {
   ASSERT(handle_->fd() >= 0);
   return write(handle_->fd(), buffer, num_bytes);
 }
@@ skipping 592 matching lines @@
     return kIdentical;
   } else {
     return kDifferent;
   }
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_WINDOWS)