| // Copyright 2011 Google Inc. All Rights Reserved. |
| |
| #include "mark_stack.h" |
| |
| #include <sys/mman.h> |
| |
| #include "globals.h" |
| #include "logging.h" |
| #include "scoped_ptr.h" |
| |
| namespace art { |
| |
| MarkStack* MarkStack::Create() { |
| scoped_ptr<MarkStack> mark_stack(new MarkStack()); |
| bool success = mark_stack->Init(); |
| if (!success) { |
| return NULL; |
| } else { |
| return mark_stack.release(); |
| } |
| } |
| |
| bool MarkStack::Init() { |
| size_t length = 64 * MB; |
| mem_map_.reset(MemMap::Map(length, PROT_READ | PROT_WRITE)); |
| if (mem_map_ == NULL) { |
| return false; |
| } |
| byte* addr = mem_map_->GetAddress(); |
| base_ = reinterpret_cast<const Object**>(addr); |
| limit_ = reinterpret_cast<const Object**>(addr + length); |
| ptr_ = reinterpret_cast<Object const**>(addr); |
| int result = madvise(addr, length, MADV_DONTNEED); |
| if (result == -1) { |
| PLOG(WARNING) << "madvise failed"; |
| } |
| return true; |
| } |
| |
| MarkStack::~MarkStack() {} |
| |
| } // namespace art |