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// 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(size_t maximum_size) {
scoped_ptr<MarkStack> mark_stack(new MarkStack());
bool success = mark_stack->Init(maximum_size);
if (!success) {
return NULL;
} else {
return mark_stack.release();
}
}
bool MarkStack::Init(size_t maximum_size) {
size_t length = 64 * MB;
mem_map_.reset(MemMap::Map(length, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS));
if (mem_map_ == NULL) {
PLOG(ERROR) << "mmap failed";
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
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