538 lines
14 KiB
C++
538 lines
14 KiB
C++
#ifndef SEGMENTED_FINDER_H
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#define SEGMENTED_FINDER_H
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#include <malloc.h>
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#include <iosfwd>
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#include <iterator>
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class SegmentedFinder;
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class SegmentFinder
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{
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public:
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SegmentFinder(DFHack::t_memrange & mr, DFHack::Context * DF, SegmentedFinder * SF)
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{
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_DF = DF;
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mr_ = mr;
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valid=false;
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if(mr.valid)
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{
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mr_.buffer = (uint8_t *)malloc (mr_.end - mr_.start);
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_SF = SF;
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try
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{
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DF->ReadRaw(mr_.start,(mr_.end - mr_.start),mr_.buffer);
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valid = true;
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}
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catch (DFHack::Error::MemoryAccessDenied &)
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{
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free(mr_.buffer);
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valid = false;
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mr.valid = false; // mark the range passed in as bad
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cout << "Range 0x" << hex << mr_.start << " - 0x" << mr_.end << dec << " not readable." << endl;
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}
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}
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}
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~SegmentFinder()
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{
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if(valid)
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free(mr_.buffer);
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}
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bool isValid()
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{
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return valid;
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}
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template <class needleType, class hayType, typename comparator >
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bool Find (needleType needle, const uint8_t increment , vector <uint64_t> &newfound, comparator oper)
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{
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if(!valid) return !newfound.empty();
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//loop
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for(uint64_t offset = 0; offset < (mr_.end - mr_.start) - sizeof(hayType); offset += increment)
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{
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if( oper(_SF,(hayType *)(mr_.buffer + offset), needle) )
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newfound.push_back(mr_.start + offset);
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}
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return !newfound.empty();
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}
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template < class needleType, class hayType, typename comparator >
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uint64_t FindInRange (needleType needle, comparator oper, uint64_t start, uint64_t length)
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{
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if(!valid) return 0;
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uint64_t stopper = min((mr_.end - mr_.start) - sizeof(hayType), (start - mr_.start) - sizeof(hayType) + length);
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//loop
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for(uint64_t offset = start - mr_.start; offset < stopper; offset +=1)
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{
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if( oper(_SF,(hayType *)(mr_.buffer + offset), needle) )
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return mr_.start + offset;
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}
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return 0;
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}
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template <class needleType, class hayType, typename comparator >
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bool Filter (needleType needle, vector <uint64_t> &found, vector <uint64_t> &newfound, comparator oper)
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{
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if(!valid) return !newfound.empty();
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for( uint64_t i = 0; i < found.size(); i++)
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{
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if(mr_.isInRange(found[i]))
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{
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uint64_t corrected = found[i] - mr_.start;
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if( oper(_SF,(hayType *)(mr_.buffer + corrected), needle) )
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newfound.push_back(found[i]);
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}
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}
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return !newfound.empty();
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}
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private:
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friend class SegmentedFinder;
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SegmentedFinder * _SF;
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DFHack::Context * _DF;
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DFHack::t_memrange mr_;
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bool valid;
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};
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class SegmentedFinder
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{
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public:
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SegmentedFinder(vector <DFHack::t_memrange>& ranges, DFHack::Context * DF)
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{
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_DF = DF;
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for(size_t i = 0; i < ranges.size(); i++)
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{
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segments.push_back(new SegmentFinder(ranges[i], DF, this));
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}
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}
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~SegmentedFinder()
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{
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for(size_t i = 0; i < segments.size(); i++)
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{
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delete segments[i];
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}
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}
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SegmentFinder * getSegmentForAddress (uint64_t addr)
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{
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for(size_t i = 0; i < segments.size(); i++)
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{
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if(segments[i]->mr_.isInRange(addr))
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{
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return segments[i];
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}
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}
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return 0;
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}
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template <class needleType, class hayType, typename comparator >
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bool Find (const needleType needle, const uint8_t increment, vector <uint64_t> &found, comparator oper)
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{
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found.clear();
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for(size_t i = 0; i < segments.size(); i++)
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{
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segments[i]->Find<needleType,hayType,comparator>(needle, increment, found, oper);
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}
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return !(found.empty());
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}
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template < class needleType, class hayType, typename comparator >
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uint64_t FindInRange (needleType needle, comparator oper, uint64_t start, uint64_t length)
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{
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SegmentFinder * sf = getSegmentForAddress(start);
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if(sf)
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{
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return sf->FindInRange<needleType,hayType,comparator>(needle, oper, start, length);
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}
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return 0;
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}
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template <class needleType, class hayType, typename comparator >
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bool Filter (const needleType needle, vector <uint64_t> &found, comparator oper)
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{
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vector <uint64_t> newfound;
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for(size_t i = 0; i < segments.size(); i++)
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{
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segments[i]->Filter<needleType,hayType,comparator>(needle, found, newfound, oper);
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}
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found.clear();
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found = newfound;
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return !(found.empty());
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}
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template <class needleType, class hayType, typename comparator >
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bool Incremental (needleType needle, const uint8_t increment ,vector <uint64_t> &found, comparator oper)
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{
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if(found.empty())
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{
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return Find <needleType, hayType, comparator>(needle,increment,found,oper);
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}
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else
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{
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return Filter <needleType, hayType, comparator>(needle,found,oper);
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}
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}
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template <typename T>
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T * Translate(uint64_t address)
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{
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for(size_t i = 0; i < segments.size(); i++)
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{
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if(segments[i]->mr_.isInRange(address))
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{
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return (T *) (segments[i]->mr_.buffer + address - segments[i]->mr_.start);
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}
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}
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return 0;
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}
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template <typename T>
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T Read(uint64_t address)
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{
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return *Translate<T>(address);
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}
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template <typename T>
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bool Read(uint64_t address, T& target)
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{
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T * test = Translate<T>(address);
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if(test)
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{
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target = *test;
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return true;
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}
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return false;
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}
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private:
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DFHack::Context * _DF;
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vector <SegmentFinder *> segments;
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};
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template <typename T>
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bool equalityP (SegmentedFinder* s, T *x, T y)
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{
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return (*x) == y;
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}
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struct vecTriplet
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{
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uint32_t start;
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uint32_t finish;
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uint32_t alloc_finish;
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};
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template <typename Needle>
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bool vectorLength (SegmentedFinder* s, vecTriplet *x, Needle &y)
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{
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if(x->start <= x->finish && x->finish <= x->alloc_finish)
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if((x->finish - x->start) == y)
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return true;
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return false;
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}
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// find a vector of 32bit pointers, where an object pointed to has a string 'y' as the first member
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bool vectorString (SegmentedFinder* s, vecTriplet *x, const char *y)
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{
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uint32_t object_ptr;
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// iterate over vector of pointers
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for(uint32_t idx = x->start; idx < x->finish; idx += sizeof(uint32_t))
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{
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// deref ptr idx, get ptr to object
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if(!s->Read(idx,object_ptr))
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{
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return false;
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}
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// deref ptr to first object, get ptr to string
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uint32_t string_ptr;
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if(!s->Read(object_ptr,string_ptr))
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return false;
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// get string location in our local cache
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char * str = s->Translate<char>(string_ptr);
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if(!str)
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return false;
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if(strcmp(y, str) == 0)
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return true;
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}
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return false;
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}
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// find a vector of 32bit pointers, where the first object pointed to has a string 'y' as the first member
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bool vectorStringFirst (SegmentedFinder* s, vecTriplet *x, const char *y)
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{
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uint32_t object_ptr;
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uint32_t idx = x->start;
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// deref ptr idx, get ptr to object
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if(!s->Read(idx,object_ptr))
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{
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return false;
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}
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// deref ptr to first object, get ptr to string
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uint32_t string_ptr;
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if(!s->Read(object_ptr,string_ptr))
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return false;
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// get string location in our local cache
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char * str = s->Translate<char>(string_ptr);
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if(!str)
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return false;
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if(strcmp(y, str) == 0)
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return true;
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return false;
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}
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// test if the address is between vector.start and vector.finish
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// not very useful alone, but could be a good step to filter some things
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bool vectorAddrWithin (SegmentedFinder* s, vecTriplet *x, uint32_t address)
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{
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if(address < x->finish && address >= x->start)
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return true;
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return false;
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}
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// test if an object address is within the vector of pointers
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//
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bool vectorOfPtrWithin (SegmentedFinder* s, vecTriplet *x, uint32_t address)
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{
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uint32_t object_ptr;
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for(uint32_t idx = x->start; idx < x->finish; idx += sizeof(uint32_t))
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{
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if(!s->Read(idx,object_ptr))
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{
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return false;
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}
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if(object_ptr == address)
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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 vectorAll (SegmentedFinder* s, vecTriplet *x, int )
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{
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if(x->start <= x->finish && x->finish <= x->alloc_finish)
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{
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if(s->getSegmentForAddress(x->start) == s->getSegmentForAddress(x->finish)
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&& s->getSegmentForAddress(x->finish) == s->getSegmentForAddress(x->alloc_finish))
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return true;
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}
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return false;
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}
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class Bytestreamdata
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{
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public:
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void * object;
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uint32_t length;
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uint32_t allocated;
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uint32_t n_used;
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};
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class Bytestream
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{
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public:
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Bytestream(void * obj, uint32_t len, bool alloc = false)
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{
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d = new Bytestreamdata();
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d->allocated = alloc;
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d->object = obj;
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d->length = len;
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d->n_used = 1;
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constant = false;
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}
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Bytestream()
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{
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d = new Bytestreamdata();
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d->allocated = false;
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d->object = 0;
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d->length = 0;
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d->n_used = 1;
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constant = false;
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}
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Bytestream( Bytestream & bs)
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{
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d =bs.d;
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d->n_used++;
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constant = false;
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}
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Bytestream( const Bytestream & bs)
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{
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d =bs.d;
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d->n_used++;
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constant = true;
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}
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~Bytestream()
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{
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d->n_used --;
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if(d->allocated && d->object && d->n_used == 0)
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{
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free (d->object);
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free (d);
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}
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}
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bool Allocate(size_t bytes)
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{
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if(constant)
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return false;
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if(d->allocated)
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{
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d->object = realloc(d->object, bytes);
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}
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else
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{
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d->object = malloc( bytes );
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}
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if(d->object)
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{
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d->allocated = bytes;
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return true;
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}
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else
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{
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d->allocated = 0;
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return false;
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}
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}
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template < class T >
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bool insert( T what )
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{
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if(constant)
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return false;
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if(d->length+sizeof(T) >= d->allocated)
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Allocate((d->length+sizeof(T)) * 2);
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(*(T *)( (uint64_t)d->object + d->length)) = what;
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d->length += sizeof(T);
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return true;
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}
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Bytestreamdata * d;
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bool constant;
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};
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std::ostream& operator<< ( std::ostream& out, Bytestream& bs )
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{
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if(bs.d->object)
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{
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out << "bytestream " << dec << bs.d->length << "/" << bs.d->allocated << " bytes" << endl;
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for(size_t i = 0; i < bs.d->length; i++)
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{
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out << hex << (int) ((uint8_t *) bs.d->object)[i] << " ";
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}
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out << endl;
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}
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else
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{
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out << "empty bytestresm" << endl;
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}
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return out;
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}
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std::istream& operator>> ( std::istream& out, Bytestream& bs )
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{
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string read;
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while(!out.eof())
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{
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string tmp;
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out >> tmp;
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read.append(tmp);
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}
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cout << read << endl;
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bs.d->length = 0;
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size_t first = read.find_first_of("\"");
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size_t last = read.find_last_of("\"");
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size_t start = first + 1;
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if(first == read.npos)
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{
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std::transform(read.begin(), read.end(), read.begin(), (int(*)(int)) tolower);
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bs.Allocate(read.size()); // overkill. size / 2 should be good, but this is safe
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int state = 0;
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char big = 0;
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char small = 0;
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string::iterator it = read.begin();
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// iterate through string, construct a bytestream out of 00-FF bytes
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while(it != read.end())
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{
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char reads = *it;
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if((reads >='0' && reads <= '9'))
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{
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if(state == 0)
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{
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big = reads - '0';
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state = 1;
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}
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else if(state == 1)
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{
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small = reads - '0';
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state = 0;
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bs.insert<char>(big*16 + small);
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}
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}
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if((reads >= 'a' && reads <= 'f'))
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{
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if(state == 0)
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{
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big = reads - 'a' + 10;
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state = 1;
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}
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else if(state == 1)
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{
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small = reads - 'a' + 10;
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state = 0;
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bs.insert<char>(big*16 + small);
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}
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}
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it++;
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}
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// we end in state= 1. should we add or should we trim... or throw errors?
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// I decided on adding
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if (state == 1)
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{
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small = 0;
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bs.insert<char>(big*16 + small);
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}
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}
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else
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{
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if(last == first)
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{
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// only one "
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last = read.size();
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}
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size_t length = last - start;
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// construct bytestream out of stuff between ""
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bs.d->length = length;
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if(length)
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{
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// todo: Bytestream should be able to handle this without external code
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bs.Allocate(length);
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bs.d->length = length;
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const char* strstart = read.c_str();
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memcpy(bs.d->object, strstart + start, length);
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}
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else
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{
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bs.d->object = 0;
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}
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}
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cout << bs;
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return out;
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}
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bool findBytestream (SegmentedFinder* s, void *addr, Bytestream compare )
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{
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if(memcmp(addr, compare.d->object, compare.d->length) == 0)
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return true;
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return false;
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}
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bool findString (SegmentedFinder* s, uint32_t *addr, const char * compare )
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{
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// read string pointer, translate to local scheme
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char *str = s->Translate<char>(*addr);
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// verify
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if(!str)
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return false;
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if(strcmp(str, compare) == 0)
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return true;
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return false;
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}
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bool findStrBuffer (SegmentedFinder* s, uint32_t *addr, const char * compare )
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{
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if(memcmp((const char *)addr, compare, strlen(compare)) == 0)
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return true;
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return false;
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}
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#endif // SEGMENTED_FINDER_H
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