Moved common memory primitives to new VirtualMemory class.

src/crypto/common/VirtualMemory_unix.cpp

@@ -0,0 +1,84 @@
+/* XMRig
+ * Copyright 2010      Jeff Garzik <jgarzik@pobox.com>
+ * Copyright 2012-2014 pooler      <pooler@litecoinpool.org>
+ * Copyright 2014      Lucas Jones <https://github.com/lucasjones>
+ * Copyright 2014-2016 Wolf9466    <https://github.com/OhGodAPet>
+ * Copyright 2016      Jay D Dee   <jayddee246@gmail.com>
+ * Copyright 2017-2018 XMR-Stak    <https://github.com/fireice-uk>, <https://github.com/psychocrypt>
+ * Copyright 2018      Lee Clagett <https://github.com/vtnerd>
+ * Copyright 2018-2019 SChernykh   <https://github.com/SChernykh>
+ * Copyright 2018-2019 tevador     <tevador@gmail.com>
+ * Copyright 2016-2019 XMRig       <https://github.com/xmrig>, <support@xmrig.com>
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include <stdlib.h>
+#include <sys/mman.h>
+
+
+#include "crypto/common/VirtualMemory.h"
+
+
+#if defined(__APPLE__)
+#   include <mach/vm_statistics.h>
+#endif
+
+
+
+void *xmrig::VirtualMemory::allocateExecutableMemory(size_t size)
+{
+#   if defined(__APPLE__)
+    void *mem = mmap(0, size, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANON, -1, 0);
+#   else
+    void *mem = mmap(0, size, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+#   endif
+
+    return mem == MAP_FAILED ? nullptr : mem;
+}
+
+
+void *xmrig::VirtualMemory::allocateLargePagesMemory(size_t size)
+{
+#   if defined(__APPLE__)
+    void *mem = mmap(0, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, VM_FLAGS_SUPERPAGE_SIZE_2MB, 0);
+#   elif defined(__FreeBSD__)
+    void *mem = mmap(0, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_ALIGNED_SUPER | MAP_PREFAULT_READ, -1, 0);
+#   else
+    void *mem = mmap(0, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB | MAP_POPULATE, 0, 0);
+#   endif
+
+    return mem == MAP_FAILED ? nullptr : mem;
+}
+
+
+void xmrig::VirtualMemory::flushInstructionCache(void *p, size_t size)
+{
+#   ifndef __FreeBSD__
+    __builtin___clear_cache(reinterpret_cast<char*>(p), reinterpret_cast<char*>(p) + size);
+#   endif
+}
+
+
+void xmrig::VirtualMemory::freeLargePagesMemory(void *p, size_t size)
+{
+    munmap(memory, size);
+}
+
+
+void xmrig::VirtualMemory::protectExecutableMemory(void *p, size_t size)
+{
+    mprotect(p, size, PROT_READ | PROT_EXEC);
+}