/*
https://github.com/peterix/dfhack
Copyright (c) 2009-2011 Petr Mrázek (peterix@gmail.com)
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any
damages arising from the use of this software.
Permission is granted to anyone to use this software for any
purpose, including commercial applications, and to alter it and
redistribute it freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must
not claim that you wrote the original software. If you use this
software in a product, an acknowledgment in the product documentation
would be appreciated but is not required.
2. Altered source versions must be plainly marked as such, and
must not be misrepresented as being the original software.
3. This notice may not be removed or altered from any source
distribution.
*/
#include "Internal.h"
#define _WIN32_WINNT 0x0501 // needed for INPUT struct
#define WINVER 0x0501 // OpenThread(), PSAPI, Toolhelp32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <winnt.h>
#include <psapi.h>
#include <tlhelp32.h>
typedef LONG NTSTATUS;
#define STATUS_SUCCESS ((NTSTATUS)0x00000000L)
// FIXME: it is uncertain how these map to 64bit
typedef struct _DEBUG_BUFFER
{
HANDLE SectionHandle;
PVOID SectionBase;
PVOID RemoteSectionBase;
ULONG SectionBaseDelta;
HANDLE EventPairHandle;
ULONG Unknown[2];
HANDLE RemoteThreadHandle;
ULONG InfoClassMask;
ULONG SizeOfInfo;
ULONG AllocatedSize;
ULONG SectionSize;
PVOID ModuleInformation;
PVOID BackTraceInformation;
PVOID HeapInformation;
PVOID LockInformation;
PVOID Reserved[8];
} DEBUG_BUFFER, *PDEBUG_BUFFER;
typedef struct _DEBUG_HEAP_INFORMATION
{
ULONG Base; // 0×00
ULONG Flags; // 0×04
USHORT Granularity; // 0×08
USHORT Unknown; // 0x0A
ULONG Allocated; // 0x0C
ULONG Committed; // 0×10
ULONG TagCount; // 0×14
ULONG BlockCount; // 0×18
ULONG Reserved[7]; // 0x1C
PVOID Tags; // 0×38
PVOID Blocks; // 0x3C
} DEBUG_HEAP_INFORMATION, *PDEBUG_HEAP_INFORMATION;
// RtlQueryProcessDebugInformation.DebugInfoClassMask constants
#define PDI_MODULES 0x01
#define PDI_BACKTRACE 0x02
#define PDI_HEAPS 0x04
#define PDI_HEAP_TAGS 0x08
#define PDI_HEAP_BLOCKS 0x10
#define PDI_LOCKS 0x20
extern "C" __declspec(dllimport) NTSTATUS __stdcall RtlQueryProcessDebugInformation( IN ULONG ProcessId, IN ULONG DebugInfoClassMask, IN OUT PDEBUG_BUFFER DebugBuffer);
extern "C" __declspec(dllimport) PDEBUG_BUFFER __stdcall RtlCreateQueryDebugBuffer( IN ULONG Size, IN BOOLEAN EventPair);
extern "C" __declspec(dllimport) NTSTATUS __stdcall RtlDestroyQueryDebugBuffer( IN PDEBUG_BUFFER DebugBuffer);
#include <cstring>
#include <cstdio>
#include <cstdlib>
#include <vector>
#include <string>
#include <map>
using namespace std;
#include "dfhack/VersionInfo.h"
#include "dfhack/VersionInfoFactory.h"
#include "dfhack/Error.h"
#include "dfhack/Process.h"
using namespace DFHack;
namespace DFHack
{
class PlatformSpecific
{
public:
PlatformSpecific()
{
base = 0;
sections = 0;
};
HANDLE my_handle;
vector <HANDLE> threads;
vector <HANDLE> stoppedthreads;
uint32_t my_pid;
IMAGE_NT_HEADERS pe_header;
IMAGE_SECTION_HEADER * sections;
uint32_t base;
};
}
Process::Process(VersionInfoFactory * factory)
{
HMODULE hmod = NULL;
DWORD needed;
bool found = false;
identified = false;
my_descriptor = NULL;
d = new PlatformSpecific();
// open process
d->my_pid = GetCurrentProcessId();
d->my_handle = GetCurrentProcess();
// try getting the first module of the process
if(EnumProcessModules(d->my_handle, &hmod, sizeof(hmod), &needed) == 0)
{
return; //if enumprocessModules fails, give up
}
// got base ;)
d->base = (uint32_t)hmod;
// read from this process
try
{
uint32_t pe_offset = Process::readDWord(d->base+0x3C);
read(d->base + pe_offset, sizeof(d->pe_header), (uint8_t *)&(d->pe_header));
const size_t sectionsSize = sizeof(IMAGE_SECTION_HEADER) * d->pe_header.FileHeader.NumberOfSections;
d->sections = (IMAGE_SECTION_HEADER *) malloc(sectionsSize);
read(d->base + pe_offset + sizeof(d->pe_header), sectionsSize, (uint8_t *)(d->sections));
}
catch (exception &)
{
return;
}
VersionInfo* vinfo = factory->getVersionInfoByPETimestamp(d->pe_header.FileHeader.TimeDateStamp);
if(vinfo)
{
vector<uint32_t> threads_ids;
if(!getThreadIDs( threads_ids ))
{
// thread enumeration failed.
return;
}
identified = true;
// give the process a data model and memory layout fixed for the base of first module
my_descriptor = new VersionInfo(*vinfo);
my_descriptor->RebaseAll(d->base);
// keep track of created memory_info object so we can destroy it later
my_descriptor->setParentProcess(this);
for(size_t i = 0; i < threads_ids.size();i++)
{
HANDLE hThread = OpenThread(THREAD_ALL_ACCESS, FALSE, (DWORD) threads_ids[i]);
if(hThread)
d->threads.push_back(hThread);
else
cerr << "Unable to open thread :" << hex << (DWORD) threads_ids[i] << endl;
}
}
}
Process::~Process()
{
// destroy our rebased copy of the memory descriptor
delete my_descriptor;
for(size_t i = 0; i < d->threads.size(); i++)
CloseHandle(d->threads[i]);
if(d->sections != NULL)
free(d->sections);
}
bool Process::getThreadIDs(vector<uint32_t> & threads )
{
HANDLE AllThreads = INVALID_HANDLE_VALUE;
THREADENTRY32 te32;
AllThreads = CreateToolhelp32Snapshot( TH32CS_SNAPTHREAD, 0 );
if( AllThreads == INVALID_HANDLE_VALUE )
{
return false;
}
te32.dwSize = sizeof(THREADENTRY32 );
if( !Thread32First( AllThreads, &te32 ) )
{
CloseHandle( AllThreads );
return false;
}
do
{
if( te32.th32OwnerProcessID == d->my_pid )
{
threads.push_back(te32.th32ThreadID);
}
} while( Thread32Next(AllThreads, &te32 ) );
CloseHandle( AllThreads );
return true;
}
/*
typedef struct _MEMORY_BASIC_INFORMATION
{
void * BaseAddress;
void * AllocationBase;
uint32_t AllocationProtect;
size_t RegionSize;
uint32_t State;
uint32_t Protect;
uint32_t Type;
} MEMORY_BASIC_INFORMATION, *PMEMORY_BASIC_INFORMATION;
*/
/*
//Internal structure used to store heap block information.
struct HeapBlock
{
PVOID dwAddress;
DWORD dwSize;
DWORD dwFlags;
ULONG reserved;
};
*/
void HeapNodes(DWORD pid, map<uint64_t, unsigned int> & heaps)
{
// Create debug buffer
PDEBUG_BUFFER db = RtlCreateQueryDebugBuffer(0, FALSE);
// Get process heap data
RtlQueryProcessDebugInformation( pid, PDI_HEAPS/* | PDI_HEAP_BLOCKS*/, db);
ULONG heapNodeCount = db->HeapInformation ? *PULONG(db->HeapInformation):0;
PDEBUG_HEAP_INFORMATION heapInfo = PDEBUG_HEAP_INFORMATION(PULONG(db-> HeapInformation) + 1);
// Go through each of the heap nodes and dispaly the information
for (unsigned int i = 0; i < heapNodeCount; i++)
{
heaps[heapInfo[i].Base] = i;
}
// Clean up the buffer
RtlDestroyQueryDebugBuffer( db );
}
// FIXME: NEEDS TESTING!
void Process::getMemRanges( vector<t_memrange> & ranges )
{
MEMORY_BASIC_INFORMATION MBI;
map<uint64_t, unsigned int> heaps;
uint64_t movingStart = 0;
map <uint64_t, string> nameMap;
// get page size
SYSTEM_INFO si;
GetSystemInfo(&si);
uint64_t PageSize = si.dwPageSize;
// enumerate heaps
HeapNodes(d->my_pid, heaps);
// go through all the VM regions, convert them to our internal format
while (VirtualQueryEx(d->my_handle, (const void*) (movingStart), &MBI, sizeof(MBI)) == sizeof(MBI))
{
movingStart = ((uint64_t)MBI.BaseAddress + MBI.RegionSize);
if(movingStart % PageSize != 0)
movingStart = (movingStart / PageSize + 1) * PageSize;
// skip empty regions and regions we share with other processes (DLLs)
if( !(MBI.State & MEM_COMMIT) /*|| !(MBI.Type & MEM_PRIVATE)*/ )
continue;
t_memrange temp;
temp.start = (uint64_t) MBI.BaseAddress;
temp.end = ((uint64_t)MBI.BaseAddress + (uint64_t)MBI.RegionSize);
temp.read = MBI.Protect & PAGE_EXECUTE_READ || MBI.Protect & PAGE_EXECUTE_READWRITE || MBI.Protect & PAGE_READONLY || MBI.Protect & PAGE_READWRITE;
temp.write = MBI.Protect & PAGE_EXECUTE_READWRITE || MBI.Protect & PAGE_READWRITE;
temp.execute = MBI.Protect & PAGE_EXECUTE_READ || MBI.Protect & PAGE_EXECUTE_READWRITE || MBI.Protect & PAGE_EXECUTE;
temp.valid = true;
if(!GetModuleBaseName(d->my_handle, (HMODULE) temp.start, temp.name, 1024))
{
if(nameMap.count(temp.start))
{
// potential buffer overflow...
strcpy(temp.name, nameMap[temp.start].c_str());
}
else
{
// filter away shared segments without a name.
if( !(MBI.Type & MEM_PRIVATE) )
continue;
else
{
// could be a heap?
if(heaps.count(temp.start))
{
sprintf(temp.name,"HEAP %d",heaps[temp.start]);
}
else temp.name[0]=0;
}
}
}
else
{
// this is our executable! (could be generalized to pull segments from libs, but whatever)
if(d->base == temp.start)
{
for(int i = 0; i < d->pe_header.FileHeader.NumberOfSections; i++)
{
char sectionName[9];
memcpy(sectionName,d->sections[i].Name,8);
sectionName[8] = 0;
string nm;
nm.append(temp.name);
nm.append(" : ");
nm.append(sectionName);
nameMap[temp.start + d->sections[i].VirtualAddress] = nm;
}
}
else
continue;
}
ranges.push_back(temp);
}
}
uint32_t Process::getBase()
{
if(d)
return d->base;
return 0x400000;
}
string Process::doReadClassName (void * vptr)
{
int rtti = readDWord((uint32_t)vptr - 0x4);
int typeinfo = readDWord(rtti + 0xC);
string raw = readCString(typeinfo + 0xC); // skips the .?AV
raw.resize(raw.length() - 2);// trim @@ from end
return raw;
}
string Process::getPath()
{
HMODULE hmod;
DWORD junk;
char String[255];
EnumProcessModules(d->my_handle, &hmod, 1 * sizeof(HMODULE), &junk); //get the module from the handle
GetModuleFileNameEx(d->my_handle,hmod,String,sizeof(String)); //get the filename from the module
string out(String);
return(out.substr(0,out.find_last_of("\\")));
}
bool Process::setPermisions(const t_memrange & range,const t_memrange &trgrange)
{
DWORD newprotect=0;
if(trgrange.read && !trgrange.write && !trgrange.execute)newprotect=PAGE_READONLY;
if(trgrange.read && trgrange.write && !trgrange.execute)newprotect=PAGE_READWRITE;
if(!trgrange.read && !trgrange.write && trgrange.execute)newprotect=PAGE_EXECUTE;
if(trgrange.read && !trgrange.write && trgrange.execute)newprotect=PAGE_EXECUTE_READ;
if(trgrange.read && trgrange.write && trgrange.execute)newprotect=PAGE_EXECUTE_READWRITE;
DWORD oldprotect=0;
bool result;
result=VirtualProtect((LPVOID)range.start,range.end-range.start,newprotect,&oldprotect);
return result;
}