381 lines
9.4 KiB
C++
381 lines
9.4 KiB
C++
/*
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www.sourceforge.net/projects/dfhack
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Copyright (c) 2009 Petr Mrázek (peterix), Kenneth Ferland (Impaler[WrG]), dorf
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any
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damages arising from the use of this software.
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Permission is granted to anyone to use this software for any
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purpose, including commercial applications, and to alter it and
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redistribute it freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must
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not claim that you wrote the original software. If you use this
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software in a product, an acknowledgment in the product documentation
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would be appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and
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must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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*/
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#include "Internal.h"
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#include "ProcessFactory.h"
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#include "dfhack/VersionInfoFactory.h"
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#include "dfhack/DFProcessEnumerator.h"
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#include "dfhack/VersionInfo.h"
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using namespace DFHack;
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typedef std::vector<Process *> PROC_V;
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typedef std::map<ProcessID, Process*> PID2PROC;
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class DFHack::ProcessEnumerator::Private
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{
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public:
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Private(){};
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VersionInfoFactory *meminfo;
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PROC_V Processes;
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PID2PROC ProcMap;
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Process *GetProcessObject(ProcessID ID);
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void EnumPIDs (vector <ProcessID> &PIDs);
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};
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class DFHack::BadProcesses::Private
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{
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public:
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Private(){};
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PROC_V bad;
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};
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BadProcesses::BadProcesses():d(new Private()){}
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BadProcesses::~BadProcesses()
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{
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clear();
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delete d;
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}
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bool BadProcesses::Contains(Process* p)
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{
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for(unsigned int i = 0; i < d->bad.size(); i++)
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{
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if(d->bad[i] == p)
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return true;
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}
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return false;
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}
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bool BadProcesses::excise(Process* p)
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{
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vector<Process*>::iterator it = d->bad.begin();
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while(it != d->bad.end())
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{
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if((*it) == p)
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{
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d->bad.erase(it);
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return true;
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}
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else
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{
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it++;
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}
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}
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return false;
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}
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uint32_t BadProcesses::size()
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{
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return d->bad.size();
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}
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void BadProcesses::clear()
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{
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for(unsigned int i = 0; i < d->bad.size(); i++)
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{
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delete d->bad[i];
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}
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d->bad.clear();
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}
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void BadProcesses::push_back(Process* p)
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{
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if(p)
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d->bad.push_back(p);
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}
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Process * BadProcesses::operator[](uint32_t index)
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{
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if(index < d->bad.size())
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return d->bad[index];
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return 0;
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}
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//FIXME: wasteful
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Process *ProcessEnumerator::Private::GetProcessObject(ProcessID ID)
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{
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Process *p1 = createSHMProcess(ID.pid,meminfo->versions);
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if(p1->isIdentified())
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return p1;
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else
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delete p1;
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Process *p2 = createNormalProcess(ID.pid,meminfo->versions);
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if(p2->isIdentified())
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return p2;
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else
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delete p2;
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#ifdef LINUX_BUILD
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Process *p3 = createWineProcess(ID.pid,meminfo->versions);
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if(p3->isIdentified())
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return p3;
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else
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delete p3;
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#endif
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return 0;
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}
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#ifdef LINUX_BUILD
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void ProcessEnumerator::Private::EnumPIDs (vector <ProcessID> &PIDs)
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{
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DIR *dir_p;
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struct dirent *dir_entry_p;
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struct stat st;
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char fullname[512];
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fullname[0] = 0;
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PIDs.clear(); // make sure the vector is clear
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// Open /proc/ directory
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dir_p = opendir("/proc/");
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// Reading /proc/ entries
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while(NULL != (dir_entry_p = readdir(dir_p)))
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{
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// Only PID folders (numbers)
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if (strspn(dir_entry_p->d_name, "0123456789") != strlen(dir_entry_p->d_name))
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{
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continue;
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}
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sprintf(fullname, "/proc/%s", dir_entry_p->d_name);
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int ierr = stat (fullname, &st);
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if (ierr != 0)
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{
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printf("Cannot stat %s: ierr= %d\n", fullname, ierr);
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continue;
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}
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uint64_t Pnum = atoi(dir_entry_p->d_name);
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uint64_t ctime = st.st_ctime;
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PIDs.push_back(ProcessID(ctime,Pnum));
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}
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closedir(dir_p);
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}
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#endif
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#ifndef LINUX_BUILD
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// some magic - will come in handy when we start doing debugger stuff on Windows
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bool EnableDebugPriv()
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{
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bool bRET = FALSE;
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TOKEN_PRIVILEGES tp;
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HANDLE hToken;
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if (LookupPrivilegeValue(NULL, SE_DEBUG_NAME, &tp.Privileges[0].Luid))
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{
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if (OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES, &hToken))
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{
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if (hToken != INVALID_HANDLE_VALUE)
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{
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tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
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tp.PrivilegeCount = 1;
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if (AdjustTokenPrivileges(hToken, FALSE, &tp, 0, 0, 0))
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{
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bRET = TRUE;
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}
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CloseHandle(hToken);
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}
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}
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}
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return bRET;
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}
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typedef union
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{
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struct
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{
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uint32_t LowDword;
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uint32_t HighDword;
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};
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uint64_t Quad;
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} TWO_DWORDS;
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// Convert Windows FileTime structs to POSIX timestamp
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// from http://frenk.wordpress.com/2009/12/14/convert-filetime-to-unix-timestamp/
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uint64_t FileTime_to_POSIX(FILETIME ft)
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{
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// takes the last modified date
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TWO_DWORDS date, adjust;
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date.HighDword = ft.dwHighDateTime;
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date.LowDword = ft.dwLowDateTime;
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// 100-nanoseconds = milliseconds * 10000
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adjust.Quad = 11644473600000LL * 10000LL;
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// removes the diff between 1970 and 1601
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date.Quad -= adjust.Quad;
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// converts back from 100-nanoseconds to seconds
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return date.Quad / 10000000LL;
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}
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void ProcessEnumerator::Private::EnumPIDs (vector <ProcessID> &PIDs)
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{
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FILETIME ftCreate, ftExit, ftKernel, ftUser;
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PIDs.clear(); // make sure the vector is clear
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// Get the list of process identifiers.
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DWORD ProcArray[2048], memoryNeeded, numProccesses;
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//EnableDebugPriv();
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if ( !EnumProcesses( ProcArray, sizeof(ProcArray), &memoryNeeded ) )
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{
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cout << "EnumProcesses fail'd" << endl;
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return;
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}
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// Calculate how many process identifiers were returned.
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numProccesses = memoryNeeded / sizeof(DWORD);
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EnableDebugPriv();
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// iterate through processes
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for ( int i = 0; i < (int)numProccesses; i++ )
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{
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HANDLE proc = OpenProcess (PROCESS_QUERY_INFORMATION, false, ProcArray[i]);
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if(!proc)
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continue;
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if(GetProcessTimes(proc, &ftCreate, &ftExit, &ftKernel, &ftUser))
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{
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uint64_t ctime = FileTime_to_POSIX(ftCreate);
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uint64_t Pnum = ProcArray[i];
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PIDs.push_back(ProcessID(ctime,Pnum));
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}
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CloseHandle(proc);
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}
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}
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#endif
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bool ProcessEnumerator::Refresh( BadProcesses* invalidated_processes )
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{
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// PIDs to process
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vector <ProcessID> PIDs;
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// this will be the new process map
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PID2PROC temporary;
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// clear the vector
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d->Processes.clear();
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if(invalidated_processes)
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invalidated_processes->clear();
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d->EnumPIDs(PIDs);
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for(uint64_t i = 0; i < PIDs.size();i++)
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{
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ProcessID & PID = PIDs[i];
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// check if we know about the OS process already
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PID2PROC::iterator found= d->ProcMap.find(PID);
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if( found != d->ProcMap.end())
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{
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// we do
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// check if it does have a DFHack Process object associated with it
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Process * p = (*found).second;
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if(p)
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{
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// add it back to the vector we export
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d->Processes.push_back(p);
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}
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// remove the OS Process from ProcMap
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d->ProcMap.erase(found);
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// add the OS Process to what will be the new ProcMap
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temporary[PID] = p;
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}
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else
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{
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// an OS process we don't know yet!
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// try to make a DFHack Process object for it
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if(Process*p = d->GetProcessObject(PID))
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{
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// allright. this is something that can be used
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d->Processes.push_back(p);
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temporary[PID] = p;
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}
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else
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{
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// just a process. we track it anyway. Why not.
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temporary[PID] = 0;
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}
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}
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}
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// now the vector we export is filled again and a temporary map with valid processes is created.
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// we iterate over the old Process map and destroy all the processes that are dead.
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for(PID2PROC::const_iterator idx = d->ProcMap.begin(); idx != d->ProcMap.end();++idx)
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{
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Process * p = (*idx).second;
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if(p)
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{
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if(invalidated_processes)
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{
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invalidated_processes->push_back(p);
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}
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else
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{
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delete p;
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}
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}
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}
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d->ProcMap.swap(temporary);
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// return value depends on if we found some DF processes
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if(d->Processes.size())
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{
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return true;
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}
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return false;
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}
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uint32_t ProcessEnumerator::size()
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{
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return d->Processes.size();
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}
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Process * ProcessEnumerator::operator[](uint32_t index)
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{
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assert(index < d->Processes.size());
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return d->Processes[index];
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}
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ProcessEnumerator::ProcessEnumerator( string path_to_xml )
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: d(new Private())
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{
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d->meminfo = new VersionInfoFactory(path_to_xml);
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}
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void ProcessEnumerator::purge()
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{
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for(uint32_t i = 0;i < d->Processes.size();i++)
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{
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delete d->Processes[i];
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}
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d->ProcMap.clear();
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d->Processes.clear();
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}
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ProcessEnumerator::~ProcessEnumerator()
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{
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// delete all processes
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purge();
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delete d->meminfo;
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delete d;
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}
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