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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_MACOS) | 6 #if defined(TARGET_OS_MACOS) |
| 7 | 7 |
| 8 #include "vm/virtual_memory.h" | 8 #include "vm/virtual_memory.h" |
| 9 | 9 |
| 10 #include <sys/mman.h> // NOLINT | 10 #include <sys/mman.h> // NOLINT |
| 11 #include <unistd.h> // NOLINT | 11 #include <unistd.h> // NOLINT |
| 12 | 12 |
| 13 #include "platform/assert.h" | 13 #include "platform/assert.h" |
| 14 #include "platform/utils.h" | 14 #include "platform/utils.h" |
| 15 | 15 |
| 16 #include "vm/isolate.h" | 16 #include "vm/isolate.h" |
| 17 | 17 |
| 18 namespace dart { | 18 namespace dart { |
| 19 | 19 |
| 20 // standard MAP_FAILED causes "error: use of old-style cast" as it | 20 // standard MAP_FAILED causes "error: use of old-style cast" as it |
| 21 // defines MAP_FAILED as ((void *) -1) | 21 // defines MAP_FAILED as ((void *) -1) |
| 22 #undef MAP_FAILED | 22 #undef MAP_FAILED |
| 23 #define MAP_FAILED reinterpret_cast<void*>(-1) | 23 #define MAP_FAILED reinterpret_cast<void*>(-1) |
| 24 | 24 |
| 25 uword VirtualMemory::page_size_ = 0; | 25 uword VirtualMemory::page_size_ = 0; |
| 26 | 26 |
| 27 | 27 |
| 28 void VirtualMemory::InitOnce() { | 28 void VirtualMemory::InitOnce() { |
| 29 page_size_ = getpagesize(); | 29 page_size_ = getpagesize(); |
| 30 } | 30 } |
| 31 | 31 |
| 32 | 32 |
| 33 VirtualMemory* VirtualMemory::ReserveInternal(intptr_t size) { | 33 VirtualMemory* VirtualMemory::ReserveInternal(intptr_t size) { |
| 34 ASSERT((size & (PageSize() - 1)) == 0); | 34 ASSERT((size & (PageSize() - 1)) == 0); |
| 35 void* address = mmap(NULL, size, PROT_NONE, | 35 void* address = mmap(NULL, size, PROT_NONE, |
| 36 MAP_PRIVATE | MAP_ANON | MAP_NORESERVE, | 36 MAP_PRIVATE | MAP_ANON | MAP_NORESERVE, -1, 0); |
| 37 -1, 0); | |
| 38 if (address == MAP_FAILED) { | 37 if (address == MAP_FAILED) { |
| 39 return NULL; | 38 return NULL; |
| 40 } | 39 } |
| 41 MemoryRegion region(address, size); | 40 MemoryRegion region(address, size); |
| 42 return new VirtualMemory(region); | 41 return new VirtualMemory(region); |
| 43 } | 42 } |
| 44 | 43 |
| 45 | 44 |
| 46 static void unmap(void* address, intptr_t size) { | 45 static void unmap(void* address, intptr_t size) { |
| 47 if (size == 0) { | 46 if (size == 0) { |
| (...skipping 17 matching lines...) Expand all Loading... |
| 65 unmap(address, size); | 64 unmap(address, size); |
| 66 return true; | 65 return true; |
| 67 } | 66 } |
| 68 | 67 |
| 69 | 68 |
| 70 bool VirtualMemory::Commit(uword addr, intptr_t size, bool executable) { | 69 bool VirtualMemory::Commit(uword addr, intptr_t size, bool executable) { |
| 71 ASSERT(Contains(addr)); | 70 ASSERT(Contains(addr)); |
| 72 ASSERT(Contains(addr + size) || (addr + size == end())); | 71 ASSERT(Contains(addr + size) || (addr + size == end())); |
| 73 int prot = PROT_READ | PROT_WRITE | (executable ? PROT_EXEC : 0); | 72 int prot = PROT_READ | PROT_WRITE | (executable ? PROT_EXEC : 0); |
| 74 void* address = mmap(reinterpret_cast<void*>(addr), size, prot, | 73 void* address = mmap(reinterpret_cast<void*>(addr), size, prot, |
| 75 MAP_PRIVATE | MAP_ANON | MAP_FIXED, | 74 MAP_PRIVATE | MAP_ANON | MAP_FIXED, -1, 0); |
| 76 -1, 0); | |
| 77 if (address == MAP_FAILED) { | 75 if (address == MAP_FAILED) { |
| 78 return false; | 76 return false; |
| 79 } | 77 } |
| 80 return true; | 78 return true; |
| 81 } | 79 } |
| 82 | 80 |
| 83 | 81 |
| 84 bool VirtualMemory::Protect(void* address, intptr_t size, Protection mode) { | 82 bool VirtualMemory::Protect(void* address, intptr_t size, Protection mode) { |
| 85 ASSERT(Thread::Current()->IsMutatorThread() || | 83 ASSERT(Thread::Current()->IsMutatorThread() || |
| 86 Isolate::Current()->mutator_thread()->IsAtSafepoint()); | 84 Isolate::Current()->mutator_thread()->IsAtSafepoint()); |
| (...skipping 12 matching lines...) Expand all Loading... |
| 99 prot = PROT_READ | PROT_WRITE; | 97 prot = PROT_READ | PROT_WRITE; |
| 100 break; | 98 break; |
| 101 case kReadExecute: | 99 case kReadExecute: |
| 102 prot = PROT_READ | PROT_EXEC; | 100 prot = PROT_READ | PROT_EXEC; |
| 103 break; | 101 break; |
| 104 case kReadWriteExecute: | 102 case kReadWriteExecute: |
| 105 prot = PROT_READ | PROT_WRITE | PROT_EXEC; | 103 prot = PROT_READ | PROT_WRITE | PROT_EXEC; |
| 106 break; | 104 break; |
| 107 } | 105 } |
| 108 return (mprotect(reinterpret_cast<void*>(page_address), | 106 return (mprotect(reinterpret_cast<void*>(page_address), |
| 109 end_address - page_address, | 107 end_address - page_address, prot) == 0); |
| 110 prot) == 0); | |
| 111 } | 108 } |
| 112 | 109 |
| 113 } // namespace dart | 110 } // namespace dart |
| 114 | 111 |
| 115 #endif // defined(TARGET_OS_MACOS) | 112 #endif // defined(TARGET_OS_MACOS) |
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