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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #include "vm/globals.h" | 5 #include "vm/globals.h" |
6 #if defined(TARGET_OS_WINDOWS) | 6 #if defined(TARGET_OS_WINDOWS) |
7 | 7 |
8 #include "vm/virtual_memory.h" | 8 #include "vm/virtual_memory.h" |
9 | 9 |
10 #include "platform/assert.h" | 10 #include "platform/assert.h" |
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32 MemoryRegion region(address, size); | 32 MemoryRegion region(address, size); |
33 return new VirtualMemory(region); | 33 return new VirtualMemory(region); |
34 } | 34 } |
35 | 35 |
36 | 36 |
37 VirtualMemory::~VirtualMemory() { | 37 VirtualMemory::~VirtualMemory() { |
38 if (embedder_allocated() || (reserved_size_ == 0)) { | 38 if (embedder_allocated() || (reserved_size_ == 0)) { |
39 return; | 39 return; |
40 } | 40 } |
41 if (VirtualFree(address(), 0, MEM_RELEASE) == 0) { | 41 if (VirtualFree(address(), 0, MEM_RELEASE) == 0) { |
42 FATAL("VirtualFree failed"); | 42 FATAL1("VirtualFree failed: Error code %d\n", GetLastError()); |
43 } | 43 } |
44 } | 44 } |
45 | 45 |
46 | 46 |
47 bool VirtualMemory::FreeSubSegment(void* address, intptr_t size) { | 47 bool VirtualMemory::FreeSubSegment(void* address, intptr_t size) { |
48 // On Windows only the entire segment returned by VirtualAlloc | 48 if (VirtualFree(address, size, MEM_DECOMMIT) == 0) { |
49 // can be freed. Therefore we will have to waste these unused | 49 FATAL1("VirtualFree failed: Error code %d\n", GetLastError()); |
50 // virtual memory sub-segments. | 50 } |
51 return false; | 51 return true; |
52 } | 52 } |
53 | 53 |
54 | 54 |
55 bool VirtualMemory::Commit(uword addr, intptr_t size, bool executable) { | 55 bool VirtualMemory::Commit(uword addr, intptr_t size, bool executable) { |
56 ASSERT(Contains(addr)); | 56 ASSERT(Contains(addr)); |
57 ASSERT(Contains(addr + size) || (addr + size == end())); | 57 ASSERT(Contains(addr + size) || (addr + size == end())); |
58 int prot = executable ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE; | 58 int prot = executable ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE; |
59 if (VirtualAlloc(reinterpret_cast<void*>(addr), size, MEM_COMMIT, prot) == | 59 if (VirtualAlloc(reinterpret_cast<void*>(addr), size, MEM_COMMIT, prot) == |
60 NULL) { | 60 NULL) { |
61 return false; | 61 return false; |
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92 bool result = VirtualProtect(reinterpret_cast<void*>(page_address), | 92 bool result = VirtualProtect(reinterpret_cast<void*>(page_address), |
93 end_address - page_address, | 93 end_address - page_address, |
94 prot, | 94 prot, |
95 &old_prot); | 95 &old_prot); |
96 return result; | 96 return result; |
97 } | 97 } |
98 | 98 |
99 } // namespace dart | 99 } // namespace dart |
100 | 100 |
101 #endif // defined(TARGET_OS_WINDOWS) | 101 #endif // defined(TARGET_OS_WINDOWS) |
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