citra-emu
/
citra
Archived
1
0
Fork 0
This repository has been archived on 2024-03-23. You can view files and clone it, but cannot push or open issues or pull requests.
citra/src/common/memory_util.cpp

199 lines
5.3 KiB
C++
Raw Normal View History

2014-12-17 05:38:14 +00:00
// Copyright 2013 Dolphin Emulator Project / 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
2015-05-06 07:06:12 +00:00
#include "common/common_funcs.h"
#include "common/logging/log.h"
#include "common/memory_util.h"
#include "common/string_util.h"
#ifdef _WIN32
#include <windows.h>
#include <psapi.h>
#endif
#if !defined(_WIN32) && defined(__x86_64__) && !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)
2014-04-01 22:20:08 +00:00
void* ptr = VirtualAlloc(0, size, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
#else
2014-04-01 22:20:08 +00:00
static char *map_hint = 0;
#if defined(__x86_64__) && !defined(MAP_32BIT)
2014-04-01 22:20:08 +00:00
// 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
2014-04-01 22:20:08 +00:00
void* ptr = mmap(map_hint, size, PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_ANON | MAP_PRIVATE
#if defined(__x86_64__) && defined(MAP_32BIT)
2014-04-01 22:20:08 +00:00
| (low ? MAP_32BIT : 0)
#endif
2014-04-01 22:20:08 +00:00
, -1, 0);
#endif /* defined(_WIN32) */
2014-04-01 22:20:08 +00:00
// printf("Mapped executable memory at %p (size %ld)\n", ptr,
// (unsigned long)size);
#ifdef _WIN32
if (ptr == nullptr)
2014-04-01 22:20:08 +00:00
{
#else
if (ptr == MAP_FAILED)
2014-04-01 22:20:08 +00:00
{
ptr = nullptr;
#endif
LOG_ERROR(Common_Memory, "Failed to allocate executable memory");
2014-04-01 22:20:08 +00:00
}
#if !defined(_WIN32) && defined(__x86_64__) && !defined(MAP_32BIT)
2014-04-01 22:20:08 +00:00
else
{
if (low)
{
map_hint += size;
map_hint = (char*)round_page(map_hint); /* round up to the next page */
// printf("Next map will (hopefully) be at %p\n", map_hint);
}
}
#endif
#if defined(_M_X64)
2014-04-01 22:20:08 +00:00
if ((u64)ptr >= 0x80000000 && low == true)
LOG_ERROR(Common_Memory, "Executable memory ended up above 2GB!");
#endif
2014-04-01 22:20:08 +00:00
return ptr;
}
void* AllocateMemoryPages(size_t size)
{
#ifdef _WIN32
2014-04-01 22:20:08 +00:00
void* ptr = VirtualAlloc(0, size, MEM_COMMIT, PAGE_READWRITE);
#else
2014-04-01 22:20:08 +00:00
void* ptr = mmap(0, size, PROT_READ | PROT_WRITE,
MAP_ANON | MAP_PRIVATE, -1, 0);
if (ptr == MAP_FAILED)
ptr = nullptr;
#endif
2014-04-01 22:20:08 +00:00
// printf("Mapped memory at %p (size %ld)\n", ptr,
// (unsigned long)size);
2014-12-03 18:57:57 +00:00
if (ptr == nullptr)
LOG_ERROR(Common_Memory, "Failed to allocate raw memory");
2014-04-01 22:20:08 +00:00
return ptr;
}
void* AllocateAlignedMemory(size_t size,size_t alignment)
{
#ifdef _WIN32
2014-04-01 22:20:08 +00:00
void* ptr = _aligned_malloc(size,alignment);
#else
2014-12-03 18:57:57 +00:00
void* ptr = nullptr;
#ifdef ANDROID
2014-04-01 22:20:08 +00:00
ptr = memalign(alignment, size);
#else
2014-04-01 22:20:08 +00:00
if (posix_memalign(&ptr, alignment, size) != 0)
LOG_ERROR(Common_Memory, "Failed to allocate aligned memory");
#endif
#endif
2014-04-01 22:20:08 +00:00
// printf("Mapped memory at %p (size %ld)\n", ptr,
// (unsigned long)size);
2014-12-03 18:57:57 +00:00
if (ptr == nullptr)
LOG_ERROR(Common_Memory, "Failed to allocate aligned memory");
2014-04-01 22:20:08 +00:00
return ptr;
}
void FreeMemoryPages(void* ptr, size_t size)
{
2014-04-01 22:20:08 +00:00
if (ptr)
{
#ifdef _WIN32
2014-04-01 22:20:08 +00:00
if (!VirtualFree(ptr, 0, MEM_RELEASE))
LOG_ERROR(Common_Memory, "FreeMemoryPages failed!\n%s", GetLastErrorMsg());
2014-12-03 18:57:57 +00:00
ptr = nullptr; // Is this our responsibility?
#else
2014-04-01 22:20:08 +00:00
munmap(ptr, size);
#endif
2014-04-01 22:20:08 +00:00
}
}
void FreeAlignedMemory(void* ptr)
{
2014-04-01 22:20:08 +00:00
if (ptr)
{
#ifdef _WIN32
2014-04-01 22:20:08 +00:00
_aligned_free(ptr);
#else
2014-04-01 22:20:08 +00:00
free(ptr);
#endif
2014-04-01 22:20:08 +00:00
}
}
void WriteProtectMemory(void* ptr, size_t size, bool allowExecute)
{
#ifdef _WIN32
2014-04-01 22:20:08 +00:00
DWORD oldValue;
if (!VirtualProtect(ptr, size, allowExecute ? PAGE_EXECUTE_READ : PAGE_READONLY, &oldValue))
LOG_ERROR(Common_Memory, "WriteProtectMemory failed!\n%s", GetLastErrorMsg());
#else
2014-04-01 22:20:08 +00:00
mprotect(ptr, size, allowExecute ? (PROT_READ | PROT_EXEC) : PROT_READ);
#endif
}
void UnWriteProtectMemory(void* ptr, size_t size, bool allowExecute)
{
#ifdef _WIN32
2014-04-01 22:20:08 +00:00
DWORD oldValue;
if (!VirtualProtect(ptr, size, allowExecute ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE, &oldValue))
LOG_ERROR(Common_Memory, "UnWriteProtectMemory failed!\n%s", GetLastErrorMsg());
#else
2014-04-01 22:20:08 +00:00
mprotect(ptr, size, allowExecute ? (PROT_READ | PROT_WRITE | PROT_EXEC) : PROT_WRITE | PROT_READ);
#endif
}
std::string MemUsage()
{
#ifdef _WIN32
#pragma comment(lib, "psapi")
2014-04-01 22:20:08 +00:00
DWORD processID = GetCurrentProcessId();
HANDLE hProcess;
PROCESS_MEMORY_COUNTERS pmc;
std::string Ret;
2014-04-01 22:20:08 +00:00
// Print information about the memory usage of the process.
2014-04-01 22:20:08 +00:00
hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, processID);
2014-12-03 18:57:57 +00:00
if (nullptr == hProcess) return "MemUsage Error";
2014-04-01 22:20:08 +00:00
if (GetProcessMemoryInfo(hProcess, &pmc, sizeof(pmc)))
Ret = Common::StringFromFormat("%s K", Common::ThousandSeparate(pmc.WorkingSetSize / 1024, 7).c_str());
2014-04-01 22:20:08 +00:00
CloseHandle(hProcess);
return Ret;
#else
2014-04-01 22:20:08 +00:00
return "";
#endif
}