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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 OpenBSD and NetBSD goes here. For the | 5 // Platform-specific code for OpenBSD and NetBSD goes here. For the |
| 6 // POSIX-compatible parts, the implementation is in platform-posix.cc. | 6 // POSIX-compatible parts, the implementation is in platform-posix.cc. |
| 7 | 7 |
| 8 #include <pthread.h> | 8 #include <pthread.h> |
| 9 #include <semaphore.h> | 9 #include <semaphore.h> |
| 10 #include <signal.h> | 10 #include <signal.h> |
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| 185 // by the kernel and allows us to synchronize V8 code log and the | 185 // by the kernel and allows us to synchronize V8 code log and the |
| 186 // kernel log. | 186 // kernel log. |
| 187 int size = sysconf(_SC_PAGESIZE); | 187 int size = sysconf(_SC_PAGESIZE); |
| 188 FILE* f = fopen(OS::GetGCFakeMMapFile(), "w+"); | 188 FILE* f = fopen(OS::GetGCFakeMMapFile(), "w+"); |
| 189 if (f == NULL) { | 189 if (f == NULL) { |
| 190 OS::PrintError("Failed to open %s\n", OS::GetGCFakeMMapFile()); | 190 OS::PrintError("Failed to open %s\n", OS::GetGCFakeMMapFile()); |
| 191 OS::Abort(); | 191 OS::Abort(); |
| 192 } | 192 } |
| 193 void* addr = mmap(NULL, size, PROT_READ | PROT_EXEC, MAP_PRIVATE, | 193 void* addr = mmap(NULL, size, PROT_READ | PROT_EXEC, MAP_PRIVATE, |
| 194 fileno(f), 0); | 194 fileno(f), 0); |
| 195 ASSERT(addr != MAP_FAILED); | 195 DCHECK(addr != MAP_FAILED); |
| 196 OS::Free(addr, size); | 196 OS::Free(addr, size); |
| 197 fclose(f); | 197 fclose(f); |
| 198 } | 198 } |
| 199 | 199 |
| 200 | 200 |
| 201 | 201 |
| 202 // Constants used for mmap. | 202 // Constants used for mmap. |
| 203 static const int kMmapFd = -1; | 203 static const int kMmapFd = -1; |
| 204 static const int kMmapFdOffset = 0; | 204 static const int kMmapFdOffset = 0; |
| 205 | 205 |
| 206 | 206 |
| 207 VirtualMemory::VirtualMemory() : address_(NULL), size_(0) { } | 207 VirtualMemory::VirtualMemory() : address_(NULL), size_(0) { } |
| 208 | 208 |
| 209 | 209 |
| 210 VirtualMemory::VirtualMemory(size_t size) | 210 VirtualMemory::VirtualMemory(size_t size) |
| 211 : address_(ReserveRegion(size)), size_(size) { } | 211 : address_(ReserveRegion(size)), size_(size) { } |
| 212 | 212 |
| 213 | 213 |
| 214 VirtualMemory::VirtualMemory(size_t size, size_t alignment) | 214 VirtualMemory::VirtualMemory(size_t size, size_t alignment) |
| 215 : address_(NULL), size_(0) { | 215 : address_(NULL), size_(0) { |
| 216 ASSERT(IsAligned(alignment, static_cast<intptr_t>(OS::AllocateAlignment()))); | 216 DCHECK(IsAligned(alignment, static_cast<intptr_t>(OS::AllocateAlignment()))); |
| 217 size_t request_size = RoundUp(size + alignment, | 217 size_t request_size = RoundUp(size + alignment, |
| 218 static_cast<intptr_t>(OS::AllocateAlignment())); | 218 static_cast<intptr_t>(OS::AllocateAlignment())); |
| 219 void* reservation = mmap(OS::GetRandomMmapAddr(), | 219 void* reservation = mmap(OS::GetRandomMmapAddr(), |
| 220 request_size, | 220 request_size, |
| 221 PROT_NONE, | 221 PROT_NONE, |
| 222 MAP_PRIVATE | MAP_ANON | MAP_NORESERVE, | 222 MAP_PRIVATE | MAP_ANON | MAP_NORESERVE, |
| 223 kMmapFd, | 223 kMmapFd, |
| 224 kMmapFdOffset); | 224 kMmapFdOffset); |
| 225 if (reservation == MAP_FAILED) return; | 225 if (reservation == MAP_FAILED) return; |
| 226 | 226 |
| 227 uint8_t* base = static_cast<uint8_t*>(reservation); | 227 uint8_t* base = static_cast<uint8_t*>(reservation); |
| 228 uint8_t* aligned_base = RoundUp(base, alignment); | 228 uint8_t* aligned_base = RoundUp(base, alignment); |
| 229 ASSERT_LE(base, aligned_base); | 229 DCHECK_LE(base, aligned_base); |
| 230 | 230 |
| 231 // Unmap extra memory reserved before and after the desired block. | 231 // Unmap extra memory reserved before and after the desired block. |
| 232 if (aligned_base != base) { | 232 if (aligned_base != base) { |
| 233 size_t prefix_size = static_cast<size_t>(aligned_base - base); | 233 size_t prefix_size = static_cast<size_t>(aligned_base - base); |
| 234 OS::Free(base, prefix_size); | 234 OS::Free(base, prefix_size); |
| 235 request_size -= prefix_size; | 235 request_size -= prefix_size; |
| 236 } | 236 } |
| 237 | 237 |
| 238 size_t aligned_size = RoundUp(size, OS::AllocateAlignment()); | 238 size_t aligned_size = RoundUp(size, OS::AllocateAlignment()); |
| 239 ASSERT_LE(aligned_size, request_size); | 239 DCHECK_LE(aligned_size, request_size); |
| 240 | 240 |
| 241 if (aligned_size != request_size) { | 241 if (aligned_size != request_size) { |
| 242 size_t suffix_size = request_size - aligned_size; | 242 size_t suffix_size = request_size - aligned_size; |
| 243 OS::Free(aligned_base + aligned_size, suffix_size); | 243 OS::Free(aligned_base + aligned_size, suffix_size); |
| 244 request_size -= suffix_size; | 244 request_size -= suffix_size; |
| 245 } | 245 } |
| 246 | 246 |
| 247 ASSERT(aligned_size == request_size); | 247 DCHECK(aligned_size == request_size); |
| 248 | 248 |
| 249 address_ = static_cast<void*>(aligned_base); | 249 address_ = static_cast<void*>(aligned_base); |
| 250 size_ = aligned_size; | 250 size_ = aligned_size; |
| 251 } | 251 } |
| 252 | 252 |
| 253 | 253 |
| 254 VirtualMemory::~VirtualMemory() { | 254 VirtualMemory::~VirtualMemory() { |
| 255 if (IsReserved()) { | 255 if (IsReserved()) { |
| 256 bool result = ReleaseRegion(address(), size()); | 256 bool result = ReleaseRegion(address(), size()); |
| 257 ASSERT(result); | 257 DCHECK(result); |
| 258 USE(result); | 258 USE(result); |
| 259 } | 259 } |
| 260 } | 260 } |
| 261 | 261 |
| 262 | 262 |
| 263 bool VirtualMemory::IsReserved() { | 263 bool VirtualMemory::IsReserved() { |
| 264 return address_ != NULL; | 264 return address_ != NULL; |
| 265 } | 265 } |
| 266 | 266 |
| 267 | 267 |
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| 329 return munmap(base, size) == 0; | 329 return munmap(base, size) == 0; |
| 330 } | 330 } |
| 331 | 331 |
| 332 | 332 |
| 333 bool VirtualMemory::HasLazyCommits() { | 333 bool VirtualMemory::HasLazyCommits() { |
| 334 // TODO(alph): implement for the platform. | 334 // TODO(alph): implement for the platform. |
| 335 return false; | 335 return false; |
| 336 } | 336 } |
| 337 | 337 |
| 338 } } // namespace v8::base | 338 } } // namespace v8::base |
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