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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Platform-specific code for MacOS goes here. For the POSIX-compatible | 5 // Platform-specific code for MacOS goes here. For the POSIX-compatible |
6 // parts, the implementation is in platform-posix.cc. | 6 // parts, the implementation is in platform-posix.cc. |
7 | 7 |
8 #include <dlfcn.h> | 8 #include <dlfcn.h> |
9 #include <mach/mach_init.h> | 9 #include <mach/mach_init.h> |
10 #include <mach-o/dyld.h> | 10 #include <mach-o/dyld.h> |
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177 | 177 |
178 VirtualMemory::VirtualMemory() : address_(NULL), size_(0) { } | 178 VirtualMemory::VirtualMemory() : address_(NULL), size_(0) { } |
179 | 179 |
180 | 180 |
181 VirtualMemory::VirtualMemory(size_t size) | 181 VirtualMemory::VirtualMemory(size_t size) |
182 : address_(ReserveRegion(size)), size_(size) { } | 182 : address_(ReserveRegion(size)), size_(size) { } |
183 | 183 |
184 | 184 |
185 VirtualMemory::VirtualMemory(size_t size, size_t alignment) | 185 VirtualMemory::VirtualMemory(size_t size, size_t alignment) |
186 : address_(NULL), size_(0) { | 186 : address_(NULL), size_(0) { |
187 DCHECK(IsAligned(alignment, static_cast<intptr_t>(OS::AllocateAlignment()))); | 187 DCHECK((alignment % OS::AllocateAlignment()) == 0); |
188 size_t request_size = RoundUp(size + alignment, | 188 size_t request_size = RoundUp(size + alignment, |
189 static_cast<intptr_t>(OS::AllocateAlignment())); | 189 static_cast<intptr_t>(OS::AllocateAlignment())); |
190 void* reservation = mmap(OS::GetRandomMmapAddr(), | 190 void* reservation = mmap(OS::GetRandomMmapAddr(), |
191 request_size, | 191 request_size, |
192 PROT_NONE, | 192 PROT_NONE, |
193 MAP_PRIVATE | MAP_ANON | MAP_NORESERVE, | 193 MAP_PRIVATE | MAP_ANON | MAP_NORESERVE, |
194 kMmapFd, | 194 kMmapFd, |
195 kMmapFdOffset); | 195 kMmapFdOffset); |
196 if (reservation == MAP_FAILED) return; | 196 if (reservation == MAP_FAILED) return; |
197 | 197 |
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301 bool VirtualMemory::ReleaseRegion(void* address, size_t size) { | 301 bool VirtualMemory::ReleaseRegion(void* address, size_t size) { |
302 return munmap(address, size) == 0; | 302 return munmap(address, size) == 0; |
303 } | 303 } |
304 | 304 |
305 | 305 |
306 bool VirtualMemory::HasLazyCommits() { | 306 bool VirtualMemory::HasLazyCommits() { |
307 return false; | 307 return false; |
308 } | 308 } |
309 | 309 |
310 } } // namespace v8::base | 310 } } // namespace v8::base |
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