Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 1 | // Copyright 2011 Google Inc. All Rights Reserved. |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 2 | |
Brian Carlstrom | 578bbdc | 2011-07-21 14:07:47 -0700 | [diff] [blame] | 3 | #include "mark_stack.h" |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 4 | |
| 5 | #include <sys/mman.h> |
| 6 | |
Brian Carlstrom | 578bbdc | 2011-07-21 14:07:47 -0700 | [diff] [blame] | 7 | #include "globals.h" |
| 8 | #include "logging.h" |
| 9 | #include "scoped_ptr.h" |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 10 | |
| 11 | namespace art { |
| 12 | |
| 13 | MarkStack* MarkStack::Create(size_t maximum_size) { |
| 14 | scoped_ptr<MarkStack> mark_stack(new MarkStack()); |
| 15 | bool success = mark_stack->Init(maximum_size); |
| 16 | if (!success) { |
| 17 | return NULL; |
| 18 | } else { |
| 19 | return mark_stack.release(); |
| 20 | } |
| 21 | } |
| 22 | |
| 23 | bool MarkStack::Init(size_t maximum_size) { |
| 24 | size_t length = 64 * MB; |
Brian Carlstrom | db4d540 | 2011-08-09 12:18:28 -0700 | [diff] [blame^] | 25 | mem_map_.reset(MemMap::Map(length, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS)); |
| 26 | if (mem_map_ == NULL) { |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 27 | PLOG(ERROR) << "mmap failed"; |
| 28 | return false; |
| 29 | } |
Brian Carlstrom | db4d540 | 2011-08-09 12:18:28 -0700 | [diff] [blame^] | 30 | byte* addr = mem_map_->GetAddress(); |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 31 | base_ = reinterpret_cast<const Object**>(addr); |
Brian Carlstrom | db4d540 | 2011-08-09 12:18:28 -0700 | [diff] [blame^] | 32 | limit_ = reinterpret_cast<const Object**>(addr + length); |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 33 | ptr_ = reinterpret_cast<Object const**>(addr); |
| 34 | int result = madvise(addr, length, MADV_DONTNEED); |
| 35 | if (result == -1) { |
| 36 | PLOG(WARNING) << "madvise failed"; |
| 37 | } |
| 38 | return true; |
| 39 | } |
| 40 | |
Brian Carlstrom | db4d540 | 2011-08-09 12:18:28 -0700 | [diff] [blame^] | 41 | MarkStack::~MarkStack() {} |
Carl Shapiro | 69759ea | 2011-07-21 18:13:35 -0700 | [diff] [blame] | 42 | |
| 43 | } // namespace art |