393 lines
12 KiB
C++
393 lines
12 KiB
C++
/***
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Copyright (C) 2022 J Reece Wilson (a/k/a "Reece"). All rights reserved.
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File: AuProcessSectionViewReserved.Unix.cpp
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Date: 2022-11-15
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Author: Reece
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***/
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#include <Source/RuntimeInternal.hpp>
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#include "AuProcessSectionViewReserved.Unix.hpp"
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#include "Process.hpp"
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#include <Source/IO/FS/FileStream.Unix.hpp>
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#include "AuProcessSectionFileMapView.Unix.hpp"
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#include <Source/IO/IPC/AuIPCHandle.hpp>
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#include <Source/IO/IPC/AuIPCMemory.Unix.hpp>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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namespace Aurora::Process
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{
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ProcessSectionViewReserved::~ProcessSectionViewReserved()
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{
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if (this->pBaseAddress)
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{
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::munmap(this->pBaseAddress, this->uMaxLength);
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}
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}
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AuUInt ProcessSectionViewReserved::GetStart()
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{
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return (AuUInt)this->pBaseAddress;
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}
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AuUInt ProcessSectionViewReserved::GetEnd()
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{
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return this->GetStart() + this->uMaxLength;
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}
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bool ProcessSectionViewReserved::Init(AuUInt uLength)
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{
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this->uMaxLength = uLength;
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if (!(this->pBaseAddress = (char *)::mmap(0, uLength, PROT_NONE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0)))
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{
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this->pBaseAddress = (char *)::mmap(0, uLength, PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
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}
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return bool(this->pBaseAddress);
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}
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void ProcessSectionViewReserved::Release(AuUInt address)
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{
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auto uOffset = address - (AuUInt)this->pBaseAddress;
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this->ReleaseAddress(uOffset);
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}
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void *ProcessSectionViewReserved::MapAddress(AuUInt uOffset, AuUInt uLength,
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AuUInt prot, AuUInt share, int fd, AuUInt offset)
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{
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bool bCompleteBlock {};
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AuUInt uFoundOffset {};
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if (!this->GetAddress(uOffset, uLength, uFoundOffset, bCompleteBlock))
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{
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SysPushErrorMemory("Reserved address space has no available space");
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return {};
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}
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auto pRet = ::mmap(this->pBaseAddress + uFoundOffset,
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uLength,
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prot,
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share | MAP_FIXED,
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fd,
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offset);
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if (!pRet)
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{
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SysPushErrorMemory("mmap failed");
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ReleaseAddress(uFoundOffset);
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return {};
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}
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return pRet;
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}
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AuSPtr<IProcessSectionMapView> ProcessSectionViewReserved::Allocate(AuUInt uLength)
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{
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return this->AllocateEx(uLength, -1);
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}
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AuSPtr<IProcessSectionMapView> ProcessSectionViewReserved::MapFileByPath(const AuString &str,
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AuUInt64 uOffset,
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AuUInt uLength,
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AuFS::EFileOpenMode mode,
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AuFS::EFileAdvisoryLockLevel sectionLock)
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{
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return this->MapFileByPathEx(-1, str, uOffset, uLength, mode, sectionLock);
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}
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AuSPtr<IProcessSectionMapView> ProcessSectionViewReserved::MapFileByObject(const AuSPtr<IO::IIOHandle> &pIOHandle,
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AuUInt64 uOffset,
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AuUInt uLength,
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AuFS::EFileOpenMode mode,
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AuFS::EFileAdvisoryLockLevel processLockLevel)
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{
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return this->MapFileByObjectEx(-1, pIOHandle, uOffset, uLength, mode, processLockLevel);
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}
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AuSPtr<IProcessSectionMapView> ProcessSectionViewReserved::MapIPCMemory(const AuString &handleString,
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AuUInt64 uOffset,
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AuUInt uLength,
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AuFS::EFileOpenMode mode)
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{
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return this->MapIPCMemoryEx(-1, handleString, uOffset, uLength, mode);
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}
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AuSPtr<IProcessSectionMapView> ProcessSectionViewReserved::AllocateEx(AuUInt uLength, AuUInt uOffset)
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{
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PageTable table {};
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table.NX = true;
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table.readable = true;
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table.writable = true;
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return this->AllocateEx2(uLength, uOffset, table);
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}
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AuSPtr<IProcessSectionMapView> ProcessSectionViewReserved::AllocateEx2(AuUInt uLength, AuUInt uOffset, PageTable permissions)
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{
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if (!uLength)
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{
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SysPushErrorArg("invalid uLength");
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return {};
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}
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AuUInt32 uProtFlags {};
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if (!permissions.NX)
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{
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uProtFlags |= PROT_EXEC;
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}
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if (permissions.writable)
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{
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uProtFlags |= PROT_WRITE;
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}
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if (permissions.readable)
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{
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uProtFlags |= PROT_READ;
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}
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auto map = this->MapAddress(uOffset, uLength, uProtFlags, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
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if (map == MAP_FAILED)
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{
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SysPushErrorIO();
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return {};
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}
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auto pNewObject = AuMakeShared<ProcessSectionFileMapView>(AuUInt(map),
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uLength,
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false);
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if (!pNewObject)
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{
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SysPushErrorMem();
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return {};
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}
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pNewObject->pSharedSectionHint = AuSharedFromThis();
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return pNewObject;
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}
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AuSPtr<IProcessSectionMapView> ProcessSectionViewReserved::MapFileByPathEx(AuUInt viewOffset,
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const AuString &str,
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AuUInt64 uOffset,
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AuUInt uLength,
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Aurora::IO::FS::EFileOpenMode mode,
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Aurora::IO::FS::EFileAdvisoryLockLevel processLockLevel)
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{
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auto pHandle = AuIO::IOHandleShared();
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if (!pHandle)
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{
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SysPushErrorMemory();
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return nullptr;
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}
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AuIO::IIOHandle::HandleCreate createhandle(str);
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createhandle.eAdvisoryLevel = AuFS::EFileAdvisoryLockLevel::eNoSafety;
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createhandle.eMode = mode;
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createhandle.bFailIfNonEmptyFile = false;
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createhandle.bDirectIOMode = false;
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createhandle.bAsyncHandle = false;
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if (!pHandle->InitFromPath(createhandle))
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{
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return nullptr;
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}
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return this->MapFileByObjectEx(viewOffset, pHandle, uOffset, uLength, mode, processLockLevel);
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}
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AuSPtr<IProcessSectionMapView> ProcessSectionViewReserved::MapFileByObjectEx(AuUInt viewOffset,
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const AuSPtr<IO::IIOHandle> &pIOHandle,
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AuUInt64 uOffset,
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AuUInt uLength,
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Aurora::IO::FS::EFileOpenMode mode,
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Aurora::IO::FS::EFileAdvisoryLockLevel processLockLevel)
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{
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if (!pIOHandle)
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{
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return {};
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}
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if (!uLength)
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{
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SysPushErrorArg("invalid uLength");
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return {};
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}
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if (this->IsAddressValid(viewOffset))
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{
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SysPushErrorMemory("Address space is in use");
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return {};
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}
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int fd = ::dup(pIOHandle->GetOSHandle());
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if (fd == -1)
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{
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SysPushErrorIO();
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return {};
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}
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// TODO (Reece): lock garbage
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int prot {};
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switch (mode)
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{
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case AuFS::EFileOpenMode::eRead:
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{
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prot = PROT_READ;
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break;
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}
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case AuFS::EFileOpenMode::eWrite:
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case AuFS::EFileOpenMode::eReadWrite:
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{
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prot = PROT_READ | PROT_WRITE;
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break;
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}
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default:
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SysPushErrorGeneric();
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return {};
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};
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auto map = this->MapAddress(viewOffset, uLength, prot, MAP_SHARED, fd, uOffset);
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if (map == MAP_FAILED)
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{
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SysPushErrorIO();
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::close(fd);
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return {};
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}
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auto pNewObject = AuMakeShared<ProcessSectionFileMapView>(AuUInt(map),
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uLength,
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false,
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fd);
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if (!pNewObject)
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{
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SysPushErrorMem();
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::close(fd);
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return {};
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}
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pNewObject->pSharedSectionHint = AuSharedFromThis();
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return pNewObject;
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}
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AuSPtr<IProcessSectionMapView> ProcessSectionViewReserved::MapIPCMemoryEx(AuUInt viewOffset,
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const AuString &handleString,
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AuUInt64 uOffset,
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AuUInt uLength,
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Aurora::IO::FS::EFileOpenMode mode)
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{
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AuIPC::IPCHandle handle;
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if (!uLength)
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{
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SysPushErrorArg("invalid uLength");
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return {};
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}
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if (this->IsAddressValid(viewOffset))
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{
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SysPushErrorMemory("Address space is in use");
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return {};
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}
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if (!handle.FromString(handleString))
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{
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SysPushErrorParseError("Invalid handle: {}", handleString);
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return {};
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}
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auto val = handle.GetToken(AuIPC::EIPCHandleType::eIPCMemory, 0);
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if (!val)
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{
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SysPushErrorParseError("Invalid handle: {}", handleString);
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return {};
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}
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auto actualLength = val->token.word;
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auto path = AuIPC::GetServerPath(val->token);
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if (actualLength < uOffset + uLength)
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{
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SysPushErrorIO("Out of range");
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return {};
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}
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int fd = ::shm_open(path.c_str(), O_RDWR, S_IRUSR | S_IWUSR);
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if (fd == -1)
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{
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SysPushErrorIO();
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return {};
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}
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// TODO (Reece): lock garbage ( ??? )
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int prot {};
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switch (mode)
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{
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case AuFS::EFileOpenMode::eRead:
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{
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prot = PROT_READ;
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break;
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}
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case AuFS::EFileOpenMode::eWrite:
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case AuFS::EFileOpenMode::eReadWrite:
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{
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prot = PROT_READ | PROT_WRITE;
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break;
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}
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default:
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SysPushErrorGeneric();
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return {};
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};
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auto map = this->MapAddress(viewOffset, uLength, prot, MAP_SHARED, fd, uOffset);
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if (map == MAP_FAILED)
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{
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SysPushErrorIO();
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::close(fd);
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return {};
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}
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auto pNewObject = AuMakeShared<ProcessSectionFileMapView>(AuUInt(map),
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uLength,
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false,
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fd);
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if (!pNewObject)
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{
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SysPushErrorMem();
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::close(fd);
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return {};
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}
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pNewObject->pSharedSectionHint = AuSharedFromThis();
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return pNewObject;
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}
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AuList<AuPair<AuUInt, AuUInt>> ProcessSectionViewReserved::GetAllocations()
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{
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AU_LOCK_GUARD(this->spinlock);
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return this->allocations;
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}
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AUKN_SYM AuSPtr<IProcessSectionView> ReserveAddressSpace(AuUInt uLength)
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{
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auto &platform = AuSwInfo::GetPlatformInfo();
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auto pSectionView = AuMakeShared<ProcessSectionViewReserved>();
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if (!pSectionView)
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{
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SysPushErrorMemory();
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return {};
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}
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if (!pSectionView->Init(uLength))
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{
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SysPushErrorMemory();
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return {};
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}
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return pSectionView;
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}
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} |