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// Copyright 2013 Dolphin Emulator Project / 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <fmt/format.h>
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#include "common/logging/log.h"
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#include "common/memory_util.h"
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#ifdef _WIN32
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#include <windows.h>
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// Windows.h needs to be included before psapi.h
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#include <psapi.h>
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#include "common/common_funcs.h"
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#include "common/string_util.h"
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#else
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#include <cstdlib>
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#include <sys/mman.h>
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#endif
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#if !defined(_WIN32) && defined(ARCHITECTURE_x86_64) && !defined(MAP_32BIT)
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#include <unistd.h>
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#define PAGE_MASK (getpagesize() - 1)
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#define round_page(x) ((((unsigned long)(x)) + PAGE_MASK) & ~(PAGE_MASK))
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#endif
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// This is purposely not a full wrapper for virtualalloc/mmap, but it
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// provides exactly the primitive operations that Dolphin needs.
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void* AllocateExecutableMemory(std::size_t size, bool low) {
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#if defined(_WIN32)
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void* ptr = VirtualAlloc(nullptr, size, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
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#else
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static char* map_hint = nullptr;
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#if defined(ARCHITECTURE_x86_64) && !defined(MAP_32BIT)
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// This OS has no flag to enforce allocation below the 4 GB boundary,
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// but if we hint that we want a low address it is very likely we will
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// get one.
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// An older version of this code used MAP_FIXED, but that has the side
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// effect of discarding already mapped pages that happen to be in the
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// requested virtual memory range (such as the emulated RAM, sometimes).
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if (low && (!map_hint))
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map_hint = (char*)round_page(512 * 1024 * 1024); /* 0.5 GB rounded up to the next page */
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#endif
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void* ptr = mmap(map_hint, size, PROT_READ | PROT_WRITE | PROT_EXEC,
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MAP_ANON | MAP_PRIVATE
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#if defined(ARCHITECTURE_x86_64) && defined(MAP_32BIT)
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| (low ? MAP_32BIT : 0)
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#endif
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,
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-1, 0);
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#endif /* defined(_WIN32) */
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#ifdef _WIN32
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if (ptr == nullptr) {
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#else
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if (ptr == MAP_FAILED) {
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ptr = nullptr;
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#endif
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LOG_ERROR(Common_Memory, "Failed to allocate executable memory");
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}
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#if !defined(_WIN32) && defined(ARCHITECTURE_x86_64) && !defined(MAP_32BIT)
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else {
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if (low) {
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map_hint += size;
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map_hint = (char*)round_page(map_hint); /* round up to the next page */
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}
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}
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#endif
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#if EMU_ARCH_BITS == 64
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if ((u64)ptr >= 0x80000000 && low == true)
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LOG_ERROR(Common_Memory, "Executable memory ended up above 2GB!");
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#endif
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return ptr;
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}
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void* AllocateMemoryPages(std::size_t size) {
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#ifdef _WIN32
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void* ptr = VirtualAlloc(nullptr, size, MEM_COMMIT, PAGE_READWRITE);
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#else
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void* ptr = mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
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if (ptr == MAP_FAILED)
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ptr = nullptr;
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#endif
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if (ptr == nullptr)
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LOG_ERROR(Common_Memory, "Failed to allocate raw memory");
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return ptr;
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}
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void* AllocateAlignedMemory(std::size_t size, std::size_t alignment) {
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#ifdef _WIN32
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void* ptr = _aligned_malloc(size, alignment);
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#else
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void* ptr = nullptr;
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#ifdef ANDROID
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ptr = memalign(alignment, size);
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#else
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if (posix_memalign(&ptr, alignment, size) != 0)
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LOG_ERROR(Common_Memory, "Failed to allocate aligned memory");
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#endif
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#endif
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if (ptr == nullptr)
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LOG_ERROR(Common_Memory, "Failed to allocate aligned memory");
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return ptr;
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}
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void FreeMemoryPages(void* ptr, std::size_t size) {
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if (ptr) {
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#ifdef _WIN32
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if (!VirtualFree(ptr, 0, MEM_RELEASE))
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LOG_ERROR(Common_Memory, "FreeMemoryPages failed!\n{}", GetLastErrorMsg());
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#else
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munmap(ptr, size);
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#endif
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}
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}
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void FreeAlignedMemory(void* ptr) {
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if (ptr) {
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#ifdef _WIN32
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_aligned_free(ptr);
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#else
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free(ptr);
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#endif
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}
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}
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void WriteProtectMemory(void* ptr, std::size_t size, bool allowExecute) {
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#ifdef _WIN32
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DWORD oldValue;
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if (!VirtualProtect(ptr, size, allowExecute ? PAGE_EXECUTE_READ : PAGE_READONLY, &oldValue))
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LOG_ERROR(Common_Memory, "WriteProtectMemory failed!\n{}", GetLastErrorMsg());
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#else
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mprotect(ptr, size, allowExecute ? (PROT_READ | PROT_EXEC) : PROT_READ);
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#endif
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}
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void UnWriteProtectMemory(void* ptr, std::size_t size, bool allowExecute) {
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#ifdef _WIN32
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DWORD oldValue;
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if (!VirtualProtect(ptr, size, allowExecute ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE,
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&oldValue))
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LOG_ERROR(Common_Memory, "UnWriteProtectMemory failed!\n{}", GetLastErrorMsg());
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#else
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mprotect(ptr, size,
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allowExecute ? (PROT_READ | PROT_WRITE | PROT_EXEC) : PROT_WRITE | PROT_READ);
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#endif
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}
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std::string MemUsage() {
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#ifdef _WIN32
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#pragma comment(lib, "psapi")
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DWORD processID = GetCurrentProcessId();
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HANDLE hProcess;
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PROCESS_MEMORY_COUNTERS pmc;
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std::string Ret;
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// Print information about the memory usage of the process.
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hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, processID);
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if (nullptr == hProcess)
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return "MemUsage Error";
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if (GetProcessMemoryInfo(hProcess, &pmc, sizeof(pmc)))
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Ret = fmt::format("{} K", Common::ThousandSeparate(pmc.WorkingSetSize / 1024, 7));
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CloseHandle(hProcess);
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return Ret;
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#else
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return "";
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#endif
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}
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Weiyi Wang
GitHub