forked from dolphin-emu/dolphin
280 lines
6.7 KiB
C++
280 lines
6.7 KiB
C++
// Copyright 2008 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include <cstddef>
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#include <cstdlib>
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#include <string>
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#include "Common/CommonFuncs.h"
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#include "Common/CommonTypes.h"
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#include "Common/Logging/Log.h"
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#include "Common/MemoryUtil.h"
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#include "Common/MsgHandler.h"
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#ifdef _WIN32
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#include <windows.h>
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#include <psapi.h>
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#include "Common/StringUtil.h"
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#else
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#include <stdio.h>
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#include <sys/mman.h>
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#include <sys/types.h>
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#if defined __APPLE__ || defined __FreeBSD__ || defined __OpenBSD__
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#include <sys/sysctl.h>
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#else
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#include <sys/sysinfo.h>
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#endif
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#endif
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// Valgrind doesn't support MAP_32BIT.
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// Uncomment the following line to be able to run Dolphin in Valgrind.
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//#undef MAP_32BIT
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namespace Common
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{
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#if !defined(_WIN32) && defined(_M_X86_64) && !defined(MAP_32BIT)
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#include <unistd.h>
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static uintptr_t RoundPage(uintptr_t addr)
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{
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uintptr_t mask = getpagesize() - 1;
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return (addr + mask) & ~mask;
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}
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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(size_t size, bool low)
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{
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#if defined(_WIN32)
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void* ptr = VirtualAlloc(0, 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(_M_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*)RoundPage(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, MAP_ANON | MAP_PRIVATE
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#if defined(_M_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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{
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#else
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if (ptr == MAP_FAILED)
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{
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ptr = nullptr;
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#endif
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PanicAlert("Failed to allocate executable memory. If you are running Dolphin in Valgrind, try "
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"'#undef MAP_32BIT'.");
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}
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#if !defined(_WIN32) && defined(_M_X86_64) && !defined(MAP_32BIT)
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else
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{
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if (low)
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{
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map_hint += size;
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map_hint = (char*)RoundPage((uintptr_t)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 _M_X86_64
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if ((u64)ptr >= 0x80000000 && low == true)
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PanicAlert("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(size_t size)
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{
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#ifdef _WIN32
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void* ptr = VirtualAlloc(0, 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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PanicAlert("Failed to allocate raw memory");
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return ptr;
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}
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void* AllocateAlignedMemory(size_t size, size_t alignment)
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{
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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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if (posix_memalign(&ptr, alignment, size) != 0)
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ERROR_LOG(MEMMAP, "Failed to allocate aligned memory");
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#endif
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if (ptr == nullptr)
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PanicAlert("Failed to allocate aligned memory");
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return ptr;
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}
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void FreeMemoryPages(void* ptr, size_t size)
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{
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if (ptr)
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{
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bool error_occurred = false;
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#ifdef _WIN32
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if (!VirtualFree(ptr, 0, MEM_RELEASE))
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error_occurred = true;
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#else
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int retval = munmap(ptr, size);
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if (retval != 0)
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error_occurred = true;
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#endif
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if (error_occurred)
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PanicAlert("FreeMemoryPages failed!\n%s", GetLastErrorMsg().c_str());
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}
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}
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void FreeAlignedMemory(void* ptr)
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{
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if (ptr)
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{
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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 ReadProtectMemory(void* ptr, size_t size)
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{
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bool error_occurred = false;
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#ifdef _WIN32
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DWORD oldValue;
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if (!VirtualProtect(ptr, size, PAGE_NOACCESS, &oldValue))
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error_occurred = true;
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#else
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int retval = mprotect(ptr, size, PROT_NONE);
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if (retval != 0)
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error_occurred = true;
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#endif
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if (error_occurred)
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PanicAlert("ReadProtectMemory failed!\n%s", GetLastErrorMsg().c_str());
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}
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void WriteProtectMemory(void* ptr, size_t size, bool allowExecute)
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{
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bool error_occurred = false;
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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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error_occurred = true;
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#else
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int retval = mprotect(ptr, size, allowExecute ? (PROT_READ | PROT_EXEC) : PROT_READ);
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if (retval != 0)
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error_occurred = true;
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#endif
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if (error_occurred)
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PanicAlert("WriteProtectMemory failed!\n%s", GetLastErrorMsg().c_str());
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}
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void UnWriteProtectMemory(void* ptr, size_t size, bool allowExecute)
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{
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bool error_occurred = false;
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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, &oldValue))
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error_occurred = true;
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#else
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int retval = mprotect(ptr, size, allowExecute ? (PROT_READ | PROT_WRITE | PROT_EXEC) :
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PROT_WRITE | PROT_READ);
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if (retval != 0)
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error_occurred = true;
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#endif
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if (error_occurred)
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PanicAlert("UnWriteProtectMemory failed!\n%s", GetLastErrorMsg().c_str());
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}
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std::string MemUsage()
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{
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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 = StringFromFormat("%s K", ThousandSeparate(pmc.WorkingSetSize / 1024, 7).c_str());
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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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size_t MemPhysical()
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{
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#ifdef _WIN32
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MEMORYSTATUSEX memInfo;
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memInfo.dwLength = sizeof(MEMORYSTATUSEX);
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GlobalMemoryStatusEx(&memInfo);
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return memInfo.ullTotalPhys;
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#elif defined __APPLE__ || defined __FreeBSD__ || defined __OpenBSD__
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int mib[2];
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size_t physical_memory;
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mib[0] = CTL_HW;
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#ifdef __APPLE__
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mib[1] = HW_MEMSIZE;
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#elif defined __FreeBSD__
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mib[1] = HW_REALMEM;
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#elif defined __OpenBSD__
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mib[1] = HW_PHYSMEM;
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#endif
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size_t length = sizeof(size_t);
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sysctl(mib, 2, &physical_memory, &length, NULL, 0);
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return physical_memory;
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#else
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struct sysinfo memInfo;
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sysinfo(&memInfo);
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return (size_t)memInfo.totalram * memInfo.mem_unit;
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#endif
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}
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} // namespace Common
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