Description
Type of values manipulated by the concrete domain.
Values of type type are used whenever a value needs to be stored, such as memory addresses, the values stored at those addresses, the values stored in registers, the operands for RISC operations, and the results of those operations. Each value has a known size and known bits. All RISC operations on these values will produce a new known value. This type is not capable of storing an undefined value, and any attempt to create an undefined value will create a value with all bits cleared instead.
Definition at line 42 of file ConcreteSemantics.h.
#include <Rose/BinaryAnalysis/InstructionSemantics2/ConcreteSemantics.h>
Public Types | |
| using | Super = BaseSemantics::SValue |
| Base type. More... | |
| using | Ptr = SValuePtr |
| Shared-ownership pointer. More... | |
 Public Types inherited from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::SValue | |
| using | Ptr = SValuePtr |
| Shared-ownership pointer for an SValue object. More... | |
Public Member Functions | |
| virtual BaseSemantics::SValuePtr | undefined_ (size_t nbits) const override |
| Create a new undefined semantic value. More... | |
| virtual BaseSemantics::SValuePtr | unspecified_ (size_t nbits) const override |
| Create a new unspecified semantic value. More... | |
| virtual BaseSemantics::SValuePtr | bottom_ (size_t nbits) const override |
| Data-flow bottom value. More... | |
| virtual BaseSemantics::SValuePtr | number_ (size_t nbits, uint64_t value) const override |
| Create a new concrete semantic value. More... | |
| virtual BaseSemantics::SValuePtr | boolean_ (bool value) const override |
| Create a new, Boolean value. More... | |
| virtual BaseSemantics::SValuePtr | copy (size_t new_width=0) const override |
Create a new value from an existing value, changing the width if new_width is non-zero. More... | |
| virtual Sawyer::Optional< BaseSemantics::SValuePtr > | createOptionalMerge (const BaseSemantics::SValuePtr &other, const BaseSemantics::MergerPtr &, const SmtSolverPtr &) const override |
| Possibly create a new value by merging two existing values. More... | |
| virtual void | hash (Combinatorics::Hasher &) const override |
| Hash this semantic value. More... | |
| virtual bool | isBottom () const override |
| Determines whether a value is a data-flow bottom. More... | |
| virtual void | print (std::ostream &, BaseSemantics::Formatter &) const override |
| Print a value to a stream using default format. More... | |
| virtual bool | may_equal (const BaseSemantics::SValuePtr &other, const SmtSolverPtr &solver=SmtSolverPtr()) const override |
| Virtual API. More... | |
| virtual bool | must_equal (const BaseSemantics::SValuePtr &other, const SmtSolverPtr &solver=SmtSolverPtr()) const override |
| Virtual API. More... | |
| virtual void | set_width (size_t nbits) override |
| Virtual API. More... | |
| virtual bool | is_number () const override |
| Virtual API. More... | |
| virtual uint64_t | get_number () const override |
| Virtual API. More... | |
| virtual const Sawyer::Container::BitVector & | bits () const |
| Returns the bit vector storing the concrete value. | |
| virtual void | bits (const Sawyer::Container::BitVector &) |
| Returns the bit vector storing the concrete value. | |
| Public Member Functions inherited from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::SValue | |
| SValuePtr | createMerged (const SValuePtr &other, const MergerPtr &merger, const SmtSolverPtr &solver) const |
| Create a new value by merging two existing values. More... | |
| size_t | nBits () const |
| Property: value width. More... | |
| bool | isConcrete () const |
| Determines if the value is a concrete number. More... | |
| Sawyer::Optional< uint64_t > | toUnsigned () const |
| Converts a concrete value to a native unsigned integer. More... | |
| Sawyer::Optional< int64_t > | toSigned () const |
| Converts a concrete value to a native signed integer. More... | |
| bool | mustEqual (const SValuePtr &other, const SmtSolverPtr &solver=SmtSolverPtr()) const |
| Tests two values for equality. More... | |
| bool | mayEqual (const SValuePtr &other, const SmtSolverPtr &solver=SmtSolverPtr()) const |
| Tests two values for possible equality. More... | |
| bool | isTrue () const |
| Returns true if concrete non-zero. More... | |
| bool | isFalse () const |
| Returns true if concrete zero. More... | |
| std::string | comment () const |
| Property: Comment. More... | |
| void | comment (const std::string &) const |
| Property: Comment. More... | |
| void | print (std::ostream &) const |
| Print a value to a stream using default format. More... | |
| WithFormatter | with_format (Formatter &fmt) |
| Used for printing values with formatting. More... | |
| WithFormatter | operator+ (Formatter &fmt) |
| Used for printing values with formatting. More... | |
| WithFormatter | operator+ (const std::string &linePrefix) |
| Used for printing values with formatting. More... | |
| virtual size_t | get_width () const |
| Virtual API. More... | |
| virtual std::string | get_comment () const |
| Some subclasses support the ability to add comments to values. More... | |
| virtual void | set_comment (const std::string &) const |
| Some subclasses support the ability to add comments to values. More... | |
| Public Member Functions inherited from Sawyer::SharedObject | |
| SharedObject () | |
| Default constructor. More... | |
| SharedObject (const SharedObject &) | |
| Copy constructor. More... | |
| virtual | ~SharedObject () |
| Virtual destructor. More... | |
| SharedObject & | operator= (const SharedObject &) |
| Assignment. More... | |
| Public Member Functions inherited from Sawyer::SharedFromThis< SValue > | |
| SharedPointer< SValue > | sharedFromThis () |
Create a shared pointer from this. More... | |
| SharedPointer< const SValue > | sharedFromThis () const |
Create a shared pointer from this. More... | |
Static Public Member Functions | |
| static SValuePtr | instance () |
| Instantiate a new prototypical value. More... | |
| static SValuePtr | instance (size_t nbits) |
| Instantiate a new undefined value of specified width. More... | |
| static SValuePtr | instance (size_t nbits, uint64_t value) |
| Instantiate a new concrete value. More... | |
| static SValuePtr | promote (const BaseSemantics::SValuePtr &v) |
| Promote a base value to a SymbolicSemantics value. More... | |
| Static Public Member Functions inherited from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::SValue | |
| static SValuePtr | promote (const SValuePtr &x) |
| Static Public Member Functions inherited from Sawyer::SmallObject | |
| static SynchronizedPoolAllocator & | poolAllocator () |
| Return the pool allocator for this class. More... | |
| static void * | operator new (size_t size) |
| static void | operator delete (void *ptr, size_t size) |
Protected Member Functions | |
| SValue (size_t nbits) | |
| SValue (size_t nbits, uint64_t number) | |
| Protected Member Functions inherited from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::SValue | |
| SValue (size_t nbits) | |
| SValue (const SValue &other) | |
Protected Attributes | |
| Sawyer::Container::BitVector | bits_ |
| Protected Attributes inherited from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::SValue | |
| size_t | width |
Member Typedef Documentation
| using Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::SValue::Super = BaseSemantics::SValue |
Base type.
Definition at line 45 of file ConcreteSemantics.h.
Shared-ownership pointer.
Definition at line 48 of file ConcreteSemantics.h.
Member Function Documentation
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inlinestatic |
Instantiate a new prototypical value.
Prototypical values are only used for their virtual constructors.
Definition at line 67 of file ConcreteSemantics.h.
Referenced by boolean_(), bottom_(), Rose::BinaryAnalysis::InstructionSemantics2::ConcreteSemantics::RiscOperators::instance(), number_(), undefined_(), and unspecified_().
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inlinestatic |
Instantiate a new undefined value of specified width.
This semantic domain has no representation for an undefined values–all values are defined. Therefore any attempt to create an undefined value will result in all bits being set to zero instead.
Definition at line 75 of file ConcreteSemantics.h.
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inlinestatic |
Instantiate a new concrete value.
Definition at line 80 of file ConcreteSemantics.h.
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inlineoverridevirtual |
Create a new undefined semantic value.
The new semantic value will have the same dynamic type as the value on which this virtual method is called. This is the most common way that a new value is created. The unspecified_ method is closely related.
- See also
- unspecified_
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::SValue.
Definition at line 87 of file ConcreteSemantics.h.
References instance().
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inlineoverridevirtual |
Create a new unspecified semantic value.
The new semantic value will have the same dynamic type as the value on which this virtual method is called. Undefined (undefined_) and unspecified are closely related. Unspecified values are the same as undefined values except they're instantiated as the result of some machine instruction where the ISA documentation indicates that the value is unspecified (e.g., status flags for x86 shift and rotate instructions).
Most semantic domains make no distinction between undefined and unspecified.
- See also
- undefined_
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::SValue.
Definition at line 90 of file ConcreteSemantics.h.
References instance().
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inlineoverridevirtual |
Data-flow bottom value.
Returns a new value that represents bottom in a data-flow analysis. If a semantic domain can represent a bottom value then the isBottom predicate is true when invoked on this method's return value. If a semantic domain cannot support a bottom value, then it may return some other value.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::SValue.
Definition at line 93 of file ConcreteSemantics.h.
References instance().
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inlineoverridevirtual |
Create a new concrete semantic value.
The new value will represent the specified concrete value and have the same dynamic type as the value on which this virtual method is called. This is the most common way that a new constant is created. The number is truncated to contain nbits bits (higher order bits are cleared).
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::SValue.
Definition at line 96 of file ConcreteSemantics.h.
References instance().
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inlineoverridevirtual |
Create a new, Boolean value.
The new semantic value will have the same dynamic type as the value on which this virtual method is called. This is how 1-bit flag register values (among others) are created. The base implementation uses number_() to construct a 1-bit value whose bit is zero (false) or one (true).
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::SValue.
Definition at line 99 of file ConcreteSemantics.h.
References instance().
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inlineoverridevirtual |
Create a new value from an existing value, changing the width if new_width is non-zero.
Increasing the width logically adds zero bits to the most significant side of the value; decreasing the width logically removes bits from the most significant side of the value.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::SValue.
Definition at line 102 of file ConcreteSemantics.h.
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overridevirtual |
Possibly create a new value by merging two existing values.
This method optionally returns a new semantic value as the data-flow merge of this and other. If the two inputs are "equal" in some sense of the dataflow implementation then nothing is returned, otherwise a new value is returned. Typical usage is like this:
If you always want a copy regardless of whether the merge is necessary, then use the createMerged convenience function instead.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::SValue.
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inlinestatic |
Promote a base value to a SymbolicSemantics value.
The value v must have a SymbolicSemantics::SValue dynamic type.
Definition at line 116 of file ConcreteSemantics.h.
References Sawyer::SharedPointer< T >::dynamicCast().
Referenced by Rose::BinaryAnalysis::InstructionSemantics2::NativeSemantics::RegisterState::instance().
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overridevirtual |
Hash this semantic value.
Hashes the value by appending it to the specified hasher.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::SValue.
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inlineoverridevirtual |
Determines whether a value is a data-flow bottom.
Returns true if this value represents a bottom value for data-flow analysis. Any RiscOperation performed on an operand whose isBottom predicate returns true will itself return a bottom value. This includes operations like "xor x x" which would normally return zero.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::SValue.
Definition at line 127 of file ConcreteSemantics.h.
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overridevirtual |
Print a value to a stream using default format.
The value will normally occupy a single line and not contain leading space or line termination. See also, with_format().
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::SValue.
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overridevirtual |
Virtual API.
See mayEqual.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::SValue.
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overridevirtual |
Virtual API.
See mustEqual.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::SValue.
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overridevirtual |
Virtual API.
See nBits.
Reimplemented from Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::SValue.
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inlineoverridevirtual |
Virtual API.
See isConcrete.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::SValue.
Definition at line 149 of file ConcreteSemantics.h.
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overridevirtual |
Virtual API.
See toUnsigned and toSigned.
Implements Rose::BinaryAnalysis::InstructionSemantics2::BaseSemantics::SValue.
The documentation for this class was generated from the following file:
