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// Copyright (C) 2003 Dolphin Project.
// 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, version 2.0.
// 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 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
#include "Common.h"
#include "MemoryUtil.h"
#include "StringUtil.h"
#ifdef _WIN32
#include <windows.h>
#include <psapi.h>
#elif __GNUC__
#include <sys/mman.h>
#include <errno.h>
#include <stdio.h>
#endif
#if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
#define MAP_ANONYMOUS MAP_ANON
#endif
// MacOSX does not support MAP_VARIABLE
#ifndef MAP_VARIABLE
#define MAP_VARIABLE 0
#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)
{
#ifdef _WIN32
void* ptr = VirtualAlloc(0, size, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
if ((u64)ptr >= 0x80000000)
{
PanicAlert("Executable memory ended up above 2GB!");
// If this happens, we have to implement a free ram search scheme. ector knows how.
}
return ptr;
#else
void* retval = mmap(0, size, PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_ANONYMOUS | MAP_PRIVATE
#ifdef __x86_64__
| (low ? MAP_32BIT : 0)
#endif
, -1, 0); // | MAP_FIXED
// printf("Mapped executable memory at %p (size %i)\n", retval, size);
if (!retval)
{
PanicAlert("Failed to allocate executable memory, errno=%i", errno);
}
return retval;
#endif
}
void* AllocateMemoryPages(size_t size)
{
#ifdef _WIN32
void* ptr = VirtualAlloc(0, size, MEM_COMMIT, PAGE_READWRITE);
if (!ptr)
{
PanicAlert("Failed to allocate raw memory");
}
return ptr;
#else
void* retval = mmap(0, size, PROT_READ | PROT_WRITE,
MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); // | MAP_FIXED
// printf("Mapped memory at %p (size %i)\n", retval, size);
if (!retval)
{
PanicAlert("Failed to allocate raw memory, errno=%i", errno);
}
return retval;
#endif
}
void FreeMemoryPages(void* ptr, size_t size)
{
#ifdef _WIN32
if (ptr)
{
if (!VirtualFree(ptr, 0, MEM_RELEASE))
PanicAlert("FreeMemoryPages failed!\n%s", GetLastErrorMsg());
ptr = NULL; // Is this our responsibility?
}
#else
munmap(ptr, size);
#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))
PanicAlert("WriteProtectMemory failed!\n%s", 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))
PanicAlert("UnWriteProtectMemory failed!\n%s", GetLastErrorMsg());
#else
mprotect(ptr, size, allowExecute ? (PROT_READ | PROT_WRITE | PROT_EXEC) : PROT_WRITE | PROT_READ);
#endif
}
std::string MemUsage()
{
#ifdef _WIN32
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 (NULL == hProcess) return "MemUsage Error";
if (GetProcessMemoryInfo(hProcess, &pmc, sizeof(pmc)))
Ret = StringFromFormat("%s K", ThS((int)(pmc.WorkingSetSize / 1024), true, 7).c_str());
CloseHandle(hProcess);
return Ret;
#else
return "";
#endif
}
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