Description
Simple map-based memory state.
Memory cells (address + value pairs with additional data, ) are stored in a map-like container so that a cell can be accessed in logarithmic time given its address. The keys for the map are generated from the cell virtual addresses, either by using the address directly or by hashing it. The function that generates these keys, generateCellKey, is pure virtual.
Definition at line 27 of file MemoryCellMap.h.
#include <MemoryCellMap.h>
Public Types | |
| typedef uint64_t | CellKey |
| Key used to look up memory cells. More... | |
| typedef Sawyer::Container::Map< CellKey, MemoryCellPtr > | CellMap |
| Map of memory cells indexed by cell keys. More... | |
| typedef MemoryCellMap | Ptr |
| Shared-ownership pointer for a memory cell map object. More... | |
 Public Types inherited from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::MemoryState | |
| typedef MemoryStatePtr | Ptr |
| Shared-ownership pointer for a MemoryState. More... | |
Public Member Functions | |
| virtual CellKey | generateCellKey (const SValuePtr &address) const =0 |
| Generate a cell lookup key. More... | |
| virtual MemoryCellPtr | findCell (const SValuePtr &addr) const |
| Look up memory cell for address. More... | |
| virtual bool | isAllPresent (const SValuePtr &address, size_t nBytes, RiscOperators *addrOps) const |
| Predicate to determine whether all bytes are present. More... | |
| virtual void | clear () ROSE_OVERRIDE |
| Clear memory. More... | |
| virtual bool | merge (const MemoryStatePtr &other, RiscOperators *addrOps, RiscOperators *valOps) ROSE_OVERRIDE |
| Merge memory states for data flow analysis. More... | |
| virtual SValuePtr | readMemory (const SValuePtr &address, const SValuePtr &dflt, RiscOperators *addrOps, RiscOperators *valOps) ROSE_OVERRIDE |
| Read a value from memory. More... | |
| virtual SValuePtr | peekMemory (const SValuePtr &address, const SValuePtr &dflt, RiscOperators *addrOps, RiscOperators *valOps) ROSE_OVERRIDE |
| Read a value from memory without side effects. More... | |
| virtual void | writeMemory (const SValuePtr &address, const SValuePtr &value, RiscOperators *addrOps, RiscOperators *valOps) ROSE_OVERRIDE |
| Write a value to memory. More... | |
| virtual void | print (std::ostream &, Formatter &) const ROSE_OVERRIDE |
| Print a memory state to more than one line of output. | |
| virtual std::vector< MemoryCellPtr > | matchingCells (const MemoryCell::Predicate &) const ROSE_OVERRIDE |
| Find all matching cells. More... | |
| virtual std::vector< MemoryCellPtr > | leadingCells (const MemoryCell::Predicate &) const ROSE_OVERRIDE |
| Find leading matching cells. More... | |
| virtual void | eraseMatchingCells (const MemoryCell::Predicate &) ROSE_OVERRIDE |
| Remove all matching cells. More... | |
| virtual void | eraseLeadingCells (const MemoryCell::Predicate &) ROSE_OVERRIDE |
| Remove leading matching cells. More... | |
| virtual void | traverse (MemoryCell::Visitor &) ROSE_OVERRIDE |
| Traverse and modify cells. More... | |
| virtual MemoryCell::AddressSet | getWritersUnion (const SValuePtr &addr, size_t nBits, RiscOperators *addrOps, RiscOperators *valOps) ROSE_OVERRIDE |
| Writers for an address. More... | |
| virtual MemoryCell::AddressSet | getWritersIntersection (const SValuePtr &addr, size_t nBits, RiscOperators *addrOps, RiscOperators *valOps) ROSE_OVERRIDE |
| Writers for an address. More... | |
| Public Member Functions inherited from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::MemoryCellState | |
| void | eraseNonWritten () |
| Erase cells that have no writers. More... | |
| std::vector< MemoryCellPtr > | allCells () const |
| All cells. More... | |
| virtual MemoryCellPtr | latestWrittenCell () const |
| Property: Cell most recently written. | |
| virtual void | latestWrittenCell (const MemoryCellPtr &cell) |
| Property: Cell most recently written. | |
| Public Member Functions inherited from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::MemoryState | |
| virtual MemoryStatePtr | create (const SValuePtr &addrProtoval, const SValuePtr &valProtoval) const =0 |
| Virtual allocating constructor. More... | |
| virtual MemoryStatePtr | clone () const =0 |
| Virtual allocating copy constructor. More... | |
| SValuePtr | get_addr_protoval () const |
| Return the address protoval. More... | |
| SValuePtr | get_val_protoval () const |
| Return the value protoval. More... | |
| MergerPtr | merger () const |
| Property: Merger. More... | |
| void | merger (const MergerPtr &m) |
| Property: Merger. More... | |
| bool | byteRestricted () const |
| Indicates whether memory cell values are required to be eight bits wide. More... | |
| void | byteRestricted (bool b) |
| Indicates whether memory cell values are required to be eight bits wide. More... | |
| ByteOrder::Endianness | get_byteOrder () const |
| Memory byte order. | |
| void | set_byteOrder (ByteOrder::Endianness bo) |
| Memory byte order. | |
| void | print (std::ostream &stream, const std::string prefix="") const |
| Print a memory state to more than one line of output. | |
| WithFormatter | with_format (Formatter &fmt) |
| Used for printing memory states with formatting. More... | |
| WithFormatter | operator+ (Formatter &fmt) |
| Used for printing memory states with formatting. More... | |
Static Public Member Functions | |
| static MemoryCellMapPtr | promote (const MemoryStatePtr &x) |
| Promote a base memory state pointer to a MemoryCellMap pointer. More... | |
| Static Public Member Functions inherited from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::MemoryCellState | |
| static MemoryCellStatePtr | promote (const BaseSemantics::MemoryStatePtr &m) |
| Promote a base memory state pointer to a BaseSemantics::MemoryCellState pointer. More... | |
| Static Public Member Functions inherited from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::MemoryState | |
| static MemoryStatePtr | promote (const MemoryStatePtr &x) |
Protected Member Functions | |
| MemoryCellMap (const MemoryCellPtr &protocell) | |
| MemoryCellMap (const SValuePtr &addrProtoval, const SValuePtr &valProtoval) | |
| MemoryCellMap (const MemoryCellMap &other) | |
| Protected Member Functions inherited from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::MemoryCellState | |
| MemoryCellState (const MemoryCellPtr &protocell) | |
| MemoryCellState (const SValuePtr &addrProtoval, const SValuePtr &valProtoval) | |
| MemoryCellState (const MemoryCellState &other) | |
| Protected Member Functions inherited from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::MemoryState | |
| MemoryState (const SValuePtr &addrProtoval, const SValuePtr &valProtoval) | |
| MemoryState (const MemoryStatePtr &other) | |
Protected Attributes | |
| CellMap | cells |
| Protected Attributes inherited from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::MemoryCellState | |
| MemoryCellPtr | protocell |
| MemoryCellPtr | latestWrittenCell_ |
Member Typedef Documentation
Key used to look up memory cells.
The key is generated from the cell's virtual address either by using the address directly or by hashing it. For instance, a concrete domain might use the address directly while a symbolic domain will probably hash the symbolic address expression.
Definition at line 34 of file MemoryCellMap.h.
| typedef Sawyer::Container::Map<CellKey, MemoryCellPtr> Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::MemoryCellMap::CellMap |
Map of memory cells indexed by cell keys.
Definition at line 37 of file MemoryCellMap.h.
| typedef MemoryCellMap Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::MemoryCellMap::Ptr |
Shared-ownership pointer for a memory cell map object.
Definition at line 73 of file MemoryCellMap.h.
Member Function Documentation
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inlinestatic |
Promote a base memory state pointer to a MemoryCellMap pointer.
The memory state, x, must have a MemoryCellMap dynamic type.
Definition at line 78 of file MemoryCellMap.h.
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pure virtual |
Generate a cell lookup key.
Generates a key from a virtual address. The key is used to look up the cell in a map-based container.
Implemented in Rose::BinaryAnalysis::InstructionSemantics2::SymbolicSemantics::MemoryMapState.
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virtual |
Look up memory cell for address.
Returns the memory cell for the specified address, or a null pointer if the cell does not exist. The address is used to look up the cell in logirithmic time. This is just a convenience wrapper around matchingCells that returns either the (single) cell found by that function or a null pointer.
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virtual |
Predicate to determine whether all bytes are present.
Returns true if bytes at the specified address and the following consecutive addresses are all present in this memory state.
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virtual |
Clear memory.
Removes all memory cells from this memory state.
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::MemoryCellState.
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virtual |
Merge memory states for data flow analysis.
Merges the other state into this state, returning true if this state changed.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::MemoryState.
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virtual |
Read a value from memory.
Consults the memory represented by this MemoryState object and returns a semantic value. Depending on the semantic domain, the value can be a value that is already stored in the memory state, a supplied default value, a new value constructed from some combination of existing values and/or the default value, or anything else. For instance, in a symbolic domain the address could alias multiple existing memory locations and the implementation may choose to return a McCarthy expression. Additional data (such as SMT solvers) may be passed via the RiscOperators argument.
The size of the value being read does not necessarily need to be equal to the size of values stored in the memory state, though it typically is(1). For instance, an implementation may allow reading a 32-bit little endian value from a memory state that stores only bytes. A RiscOperators object is provided for use in these situations.
In order to support cases where an address does not match any existing location, the dflt value can be used to initialize a new memory location. The manner in which the default is used depends on the implementation. In any case, the width of the dflt value determines how much to read.
Footnote 1: A MemoryState::readMemory() call is the last in a sequence of delegations starting with RiscOperators::readMemory(). The designers of the MemoryState, State, and RiscOperators subclasses will need to coordinate to decide which layer should handle concatenating values from individual memory locations.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::MemoryState.
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virtual |
Read a value from memory without side effects.
This is similar to readMemory except there are no side effects. The memory state is not modified by this function.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::MemoryState.
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virtual |
Write a value to memory.
Consults the memory represented by this MemoryState object and possibly inserts the specified value. The details of how a value is inserted into a memory state depends entirely on the implementation in a subclass and will probably be different for each semantic domain.
A MemoryState::writeMemory() call is the last in a sequence of delegations starting with RiscOperators::writeMemory(). The designers of the MemoryState, State, and RiscOperators will need to coordinate to decide which layer (if any) should handle splitting a multi-byte value into multiple memory locations.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::MemoryState.
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virtual |
Find all matching cells.
Returns a vector of cells for which the predicate returns true.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::MemoryCellState.
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virtual |
Find leading matching cells.
Returns the vector of cells obtained by invoking the predicate on each cell and returning those leading cells for which the predicate is true. The first cell for which the predicate is false terminates the traversal and does not appear in the return value.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::MemoryCellState.
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virtual |
Remove all matching cells.
Traverses the memory cells and removes those for which the predicate returns true.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::MemoryCellState.
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virtual |
Remove leading matching cells.
Traverses the memory cells and removes those for which the predicate returns true. The traversal is terminated the first time the predicate returns false.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::MemoryCellState.
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virtual |
Traverse and modify cells.
Traverse cells and optionally modify them.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::MemoryCellState.
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virtual |
Writers for an address.
Returns the set of all writers that wrote to the specified address or any address that might alias the specified address. Memory states that don't normally compute aliases (e.g., MemoryCellMap) return only the writers for the specified address, not any aliases, and in this case getWritersUnion and getWritersIntersection return the same set.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::MemoryCellState.
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virtual |
Writers for an address.
Returns the set of all writers that wrote to the specified address and any address that might alias the specified address. Memory states that don't normally compute aliases (e.g., MemoryCellMap) return only the writers for the specified address, not any aliases, and in this case getWritersUnion and getWritersIntersection return the same set.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::MemoryCellState.
The documentation for this class was generated from the following file:
