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// Copyright 2013 Dolphin Emulator Project / 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/logging/log.h"
#include "common/memory_util.h"
#ifdef _WIN32
#include <windows.h>
// Windows.h needs to be included before psapi.h
#include <psapi.h>
#include "common/common_funcs.h"
#include "common/string_util.h"
#else
#include <cstdlib>
#include <sys/mman.h>
#endif
#if !defined(_WIN32) && defined(ARCHITECTURE_X64) && !defined(MAP_32BIT)
#include <unistd.h>
#define PAGE_MASK (getpagesize() - 1)
#define round_page(x) ((((unsigned long)(x)) + PAGE_MASK) & ~(PAGE_MASK))
#endif
// This is purposely not a full wrapper for virtualalloc/mmap, but it
// provides exactly the primitive operations that Dolphin needs.
void* AllocateExecutableMemory(size_t size, bool low) {
#if defined(_WIN32)
void* ptr = VirtualAlloc(nullptr, size, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
#else
static char* map_hint = nullptr;
#if defined(ARCHITECTURE_X64) && !defined(MAP_32BIT)
// This OS has no flag to enforce allocation below the 4 GB boundary,
// but if we hint that we want a low address it is very likely we will
// get one.
// An older version of this code used MAP_FIXED, but that has the side
// effect of discarding already mapped pages that happen to be in the
// requested virtual memory range (such as the emulated RAM, sometimes).
if (low && (!map_hint))
map_hint = (char*)round_page(512 * 1024 * 1024); /* 0.5 GB rounded up to the next page */
#endif
void* ptr = mmap(map_hint, size, PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_ANON | MAP_PRIVATE
#if defined(ARCHITECTURE_X64) && defined(MAP_32BIT)
| (low ? MAP_32BIT : 0)
#endif
,
-1, 0);
#endif /* defined(_WIN32) */
#ifdef _WIN32
if (ptr == nullptr) {
#else
if (ptr == MAP_FAILED) {
ptr = nullptr;
#endif
NGLOG_ERROR(Common_Memory, "Failed to allocate executable memory");
}
#if !defined(_WIN32) && defined(ARCHITECTURE_X64) && !defined(MAP_32BIT)
else {
if (low) {
map_hint += size;
map_hint = (char*)round_page(map_hint); /* round up to the next page */
}
}
#endif
#if EMU_ARCH_BITS == 64
if ((u64)ptr >= 0x80000000 && low == true)
NGLOG_ERROR(Common_Memory, "Executable memory ended up above 2GB!");
#endif
return ptr;
}
void* AllocateMemoryPages(size_t size) {
#ifdef _WIN32
void* ptr = VirtualAlloc(nullptr, size, MEM_COMMIT, PAGE_READWRITE);
#else
void* ptr = mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
if (ptr == MAP_FAILED)
ptr = nullptr;
#endif
if (ptr == nullptr)
NGLOG_ERROR(Common_Memory, "Failed to allocate raw memory");
return ptr;
}
void* AllocateAlignedMemory(size_t size, size_t alignment) {
#ifdef _WIN32
void* ptr = _aligned_malloc(size, alignment);
#else
void* ptr = nullptr;
#ifdef ANDROID
ptr = memalign(alignment, size);
#else
if (posix_memalign(&ptr, alignment, size) != 0)
NGLOG_ERROR(Common_Memory, "Failed to allocate aligned memory");
#endif
#endif
if (ptr == nullptr)
NGLOG_ERROR(Common_Memory, "Failed to allocate aligned memory");
return ptr;
}
void FreeMemoryPages(void* ptr, size_t size) {
if (ptr) {
#ifdef _WIN32
if (!VirtualFree(ptr, 0, MEM_RELEASE))
NGLOG_ERROR(Common_Memory, "FreeMemoryPages failed!\n{}", GetLastErrorMsg());
#else
munmap(ptr, size);
#endif
}
}
void FreeAlignedMemory(void* ptr) {
if (ptr) {
#ifdef _WIN32
_aligned_free(ptr);
#else
free(ptr);
#endif
}
}
void WriteProtectMemory(void* ptr, size_t size, bool allowExecute) {
#ifdef _WIN32
DWORD oldValue;
if (!VirtualProtect(ptr, size, allowExecute ? PAGE_EXECUTE_READ : PAGE_READONLY, &oldValue))
NGLOG_ERROR(Common_Memory, "WriteProtectMemory failed!\n{}", GetLastErrorMsg());
#else
mprotect(ptr, size, allowExecute ? (PROT_READ | PROT_EXEC) : PROT_READ);
#endif
}
void UnWriteProtectMemory(void* ptr, size_t size, bool allowExecute) {
#ifdef _WIN32
DWORD oldValue;
if (!VirtualProtect(ptr, size, allowExecute ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE,
&oldValue))
NGLOG_ERROR(Common_Memory, "UnWriteProtectMemory failed!\n{}", GetLastErrorMsg());
#else
mprotect(ptr, size,
allowExecute ? (PROT_READ | PROT_WRITE | PROT_EXEC) : PROT_WRITE | PROT_READ);
#endif
}
std::string MemUsage() {
#ifdef _WIN32
#pragma comment(lib, "psapi")
DWORD processID = GetCurrentProcessId();
HANDLE hProcess;
PROCESS_MEMORY_COUNTERS pmc;
std::string Ret;
// Print information about the memory usage of the process.
hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, processID);
if (nullptr == hProcess)
return "MemUsage Error";
if (GetProcessMemoryInfo(hProcess, &pmc, sizeof(pmc)))
Ret = Common::StringFromFormat(
"%s K", Common::ThousandSeparate(pmc.WorkingSetSize / 1024, 7).c_str());
CloseHandle(hProcess);
return Ret;
#else
return "";
#endif
}
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