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1// Copyright (c) Facebook, Inc. and its affiliates. (http://www.facebook.com)
2#include "space.h"
3
4#include <cstring>
5
6#include "os.h"
7
8namespace py {
9
10Space::Space(word size) {
11 raw_ = OS::allocateMemory(size, &size);
12 CHECK(raw_ != nullptr, "out of memory");
13 start_ = fill_ = reinterpret_cast<uword>(raw_);
14 end_ = start_ + size;
15}
16
17Space::~Space() {
18 if (raw_ != nullptr) {
19 OS::freeMemory(raw_, size());
20 }
21}
22
23void Space::protect() { OS::protectMemory(raw_, size(), OS::kNoAccess); }
24
25void Space::unprotect() { OS::protectMemory(raw_, size(), OS::kReadWrite); }
26
27void Space::reset() {
28 std::memset(reinterpret_cast<void*>(start()), 0xFF, size());
29 fill_ = start();
30}
31
32} // namespace py