angr Documentation

State Modes
These may be enabled by passing mode=xxx to a state constructor.
Mode name
Description
symbolic
The default mode. Useful for most emulation and analysis tasks.
symbolic_approximating
Symbolic mode, but enables approximations for constraint solving.
static
A preset useful for static analysis. The memory model becomes an abstract region-mapping system, "fake return" successors skipping calls are added, and more.
fastpath
A preset for extremely lightweight static analysis. Executing will skip all intensive processing to give a quick view of the behavior of code.
tracing
A preset for attempting to execute concretely through a program with a given input. Enables unicorn, enables resilience options, and will attempt to emulate access violations correctly.
Option Sets
These are sets of options, found as angr.options.xxx.
Set name
Description
common_options
Options necessary for basic execution
symbolic
Options necessary for basic symbolic execution
resilience
Options that harden angr's emulation against unsupported operations, attempting to carry on by treating the result as an unconstrained symbolic value and logging the occasion to state.history.events.
refs
Options that cause angr to keep a log of all the memory, register, and temporary references complete with dependency information in history.actions. This option consumes a lot of memory, so be careful!
approximation
Options that enable approximations of constraint solves via value-set analysis instead of calling into z3
simplification
Options that cause data to be run through z3's simplifiers before it reaches memory or register storage
unicorn
Options that enable the unicorn engine for executing on concrete data
Options
These are individual option objects, found as angr.options.XXX.
Option name
Description
Sets
Modes
Implicit adds
ABSTRACT_MEMORY
Use SimAbstractMemory to model memory as discrete regions
​
static
​
ABSTRACT_SOLVER
Allow splitting constraint sets during simplification
​
static
​
ACTION_DEPS
Track dependencies in SimActions
​
​
​
APPROXIMATE_GUARDS
Use VSA when evaluating guard conditions
​
​
​
APPROXIMATE_MEMORY_INDICES
Use VSA when evaluating memory indices
approximation
symbolic_approximating
​
APPROXIMATE_MEMORY_SIZES
Use VSA when evaluating memory load/store sizes
approximation
symbolic_approximating
​
APPROXIMATE_SATISFIABILITY
Use VSA when evaluating state satisfiability
approximation
symbolic_approximating
​
AST_DEPS
Enables dependency tracking for all claripy ASTs
​
​
During execution
AUTO_REFS
An internal option used to track dependencies in SimProcedures
​
​
During execution
AVOID_MULTIVALUED_READS
Return a symbolic value without touching memory for any read that has a symbolic address
​
fastpath
​
AVOID_MULTIVALUED_WRITES
Do not perfrom any write that has a symbolic address
​
fastpath
​
BEST_EFFORT_MEMORY_STORING
Handle huge writes of symbolic size by pretending they are actually smaller
​
static, fastpath
​
BLOCK_SCOPE_CONSTRAINTS
Clear the constraint list at the end of each block
​
static
​
BREAK_SIRSB_END
Debug: trigger a breakpoint at the end of each block
​
​
​
BREAK_SIRSB_START
Debug: trigger a breakpoint at the start of each block
​
​
​
BREAK_SIRSTMT_END
Debug: trigger a breakpoint at the end of each IR statement
​
​
​
BREAK_SIRSTMT_START
Debug: trigger a breakpoint at the start of each IR statement
​
​
​
BYPASS_ERRORED_IRCCALL
Treat clean helpers that fail with errors as returning unconstrained symbolic values
resilience
fastpath, tracing
​
BYPASS_ERRORED_IROP
Treat operations that fail with errors as returning unconstrained symbolic values
resilience
fastpath, tracing
​
BYPASS_UNSUPPORTED_IRCCALL
Treat unsupported clean helpers as returning unconstrained symbolic values
resilience
fastpath, tracing
​
BYPASS_UNSUPPORTED_IRDIRTY
Treat unsupported dirty helpers as returning unconstrained symbolic values
resilience
fastpath, tracing
​
BYPASS_UNSUPPORTED_IREXPR
Treat unsupported IR expressions as returning unconstrained symbolic values
resilience
fastpath, tracing
​
BYPASS_UNSUPPORTED_IROP
Treat unsupported operations as returning unconstrained symbolic values
resilience
fastpath, tracing
​
BYPASS_UNSUPPORTED_IRSTMT
Treat unsupported IR statements as returning unconstrained symbolic values
resilience
fastpath, tracing
​
BYPASS_UNSUPPORTED_SYSCALL
Treat unsupported syscalls as returning unconstrained symbolic values
resilience
fastpath, tracing
​
BYPASS_VERITESTING_EXCEPTIONS
Discard emulation errors during veritesting
resilience
fastpath, tracing
​
CACHELESS_SOLVER
enable SolverCacheless
​
​
​
CALLLESS
Emulate call instructions as an unconstraining of the return value register
​
​
​
CGC_ENFORCE_FD
CGC: make sure all reads and writes go to stdin and stdout, respectively
​
​
​
CGC_NON_BLOCKING_FDS
CGC: always report "data available" in fdwait
​
​
​
CGC_NO_SYMBOLIC_RECEIVE_LENGTH
CGC: always read the maximum amount of data requested in the receive syscall
​
​
​
COMPOSITE_SOLVER
Enable SolverComposite for independent constraint set optimization
symbolic
all except static
​
CONCRETIZE
Concretize all symbolic expressions encountered during emulation
​
​
​
CONCRETIZE_SYMBOLIC_FILE_READ_SIZES
Concreteize the sizes of file reads
​
​
​
CONCRETIZE_SYMBOLIC_WRITE_SIZES
Concretize the sizes of symbolic writes to memory
​
​
​
CONSERVATIVE_READ_STRATEGY
Do not use SimConcretizationStrategyAny for reads; in case of read address concretization failures, return an unconstrained symbolic value
​
​
​
CONSERVATIVE_WRITE_STRATEGY
Do not use SimConcretizationStrategyAny for writes; in case of write address concretization failures, treat the store as a no-op
​
​
​
CONSTRAINT_TRACKING_IN_SOLVER
Set track=True for making claripy Solvers; enable use of unsat_core
​
​
​
COW_STATES
Copy states instead of mutating the initial state directly
common_options
all
​
DOWNSIZE_Z3
Downsize the claripy solver whenever possible to save memory
​
​
​
DO_CCALLS
Perform IR clean calls
symbolic
all except fastpath
​
DO_GETS
Perform IR register reads
common_options
all
​
DO_LOADS
Perform IR memory loads
common_options
all
​
DO_OPS
Perform IR computation operations
common_options
all
​
DO_PUTS
Perform IR register writes
common_options
all
​
DO_RET_EMULATION
For each Ijk_Call successor, add a corresponding Ijk_FakeRet successor
​
static, fastpath
​
DO_STORES
Perform IR memory stores
common_options
all
​
EFFICIENT_STATE_MERGING
Keep in memory any state that might be a common ancestor in a merge
​
​
Veritesting
ENABLE_NX
When in conjunction with STRICT_PAGE_ACCESS, raise a SimSegfaultException on executing non-executable memory
​
​
Automatically if supported
EXCEPTION_HANDLING
Ask all SimExceptions raised during execution to be handled by the SimOS
​
tracing
​
FAST_MEMORY
Use SimFastMemory for memory storage
​
​
​
FAST_REGISTERS
Use SimFastMemory for register storage
​
fastpath
​
INITIALIZE_ZERO_REGISTERS
Treat the initial value of registers as zero instead of unconstrained symbolic
unicorn
tracing
​
INSTRUCTION_SCOPE_CONSTRAINTS
Clear the constraint list at the end of each instruction
​
​
​
KEEP_IP_SYMBOLIC
Don't try to concretize successor states with symbolic instruction pointers
​
​
​
KEEP_MEMORY_READS_DISCRETE
In abstract memory, handle failed loads by returning a DCIS?
​
​
​
LAZY_SOLVES
Don't check satisfiability until absolutely necessary
​
​
​
MEMORY_SYMBOLIC_BYTES_MAP
Maintain a mapping of symbolic variable to which memory address it "really" corresponds to, at the paged memory level?
​
​
​
NO_SYMBOLIC_JUMP_RESOLUTION
Do not attempt to flatten symbolic-ip successors into discrete targets
​
fastpath
​
NO_SYMBOLIC_SYSCALL_RESOLUTION
Do not attempt to flatten symbolic-syscall-number successors into discrete targets
​
fastpath
​
OPTIMIZE_IR
Use LibVEX's optimization
common_options
all
​
REGION_MAPPING
Maintain a mapping of symbolic variable to which memory region it corresponds to, at the abstract memory level
​
static
​
REPLACEMENT_SOLVER
Enable SolverReplacement
​
​
​
REVERSE_MEMORY_HASH_MAP
Maintain a mapping from AST hash to which addresses it is present in
​
​
​
REVERSE_MEMORY_NAME_MAP
Maintain a mapping from symbolic variable name to which addresses it is present in, required for memory.replace_all
​
static
​
SIMPLIFY_CONSTRAINTS
Run added constraints through z3's simplifcation
​
​
​
SIMPLIFY_EXIT_GUARD
Run branch guards through z3's simplification
​
​
​
SIMPLIFY_EXIT_STATE
Perform simplification on all successor states generated
​
​
​
SIMPLIFY_EXIT_TARGET
Run jump/call/branch targets through z3's simplification
​
​
​
SIMPLIFY_EXPRS
Run the results of IR expressions through z3's simplification
​
​
​
SIMPLIFY_MEMORY_READS
Run the results of memory reads through z3's simplification
​
​
​
SIMPLIFY_MEMORY_WRITES
Run values stored to memory through z3's simplification
simplification, common_options
symbolic, symbolic_approximating, tracing
​
SIMPLIFY_REGISTER_READS
Run values read from registers through z3's simplification
​
​
​
SIMPLIFY_REGISTER_WRITES
Run values written to registers through z3's simplification
simplification, common_options
symbolic, symbolic_approximating, tracing
​
SIMPLIFY_RETS
Run values returned from SimProcedures through z3's simplification
​
​
​
STRICT_PAGE_ACCESS
Raise a SimSegfaultException when attempting to interact with memory in a way not permitted by the current permissions
​
tracing
​
SUPER_FASTPATH
Only execute the last four instructions of each block
​
​
​
SUPPORT_FLOATING_POINT
When disabled, throw an UnsupportedIROpError when encountering floating point operations
common_options
all
​
SYMBOLIC
Enable constraint solving?
symbolic
symbolic, symbolic_approximating, fastpath
​
SYMBOLIC_INITIAL_VALUES
make state.solver.Unconstrained return a symbolic value instead of zero
symbolic
all
​
SYMBOLIC_TEMPS
Treat each IR temporary as a symbolic variable; treat stores to them as constraint addition
​
​
​
SYMBOLIC_WRITE_ADDRESSES
Allow writes with symbolic addresses to be processed by concretization strategies; when disabled, only allow for variables annotated with the "multiwrite" annotation
​
​
​
TRACK_CONSTRAINTS
When disabled, don't keep any constraints added to the state
symbolic
all
​
TRACK_CONSTRAINT_ACTIONS
Keep a SimAction for each constraint added
refs
​
​
TRACK_JMP_ACTIONS
Keep a SimAction for each jump or branch
refs
​
​
TRACK_MEMORY_ACTIONS
Keep a SimAction for each memory read and write
refs
​
​
TRACK_MEMORY_MAPPING
Keep track of which pages are mapped into memory and which are not
common_options
all
​
TRACK_OP_ACTIONS
Keep a SimAction for each IR operation
​
fastpath
​
TRACK_REGISTER_ACTIONS
Keep a SimAction for each register read and write
refs
​
​
TRACK_SOLVER_VARIABLES
Maintain a listing of all the variables in all the constraints in the solver
​
​
​
TRACK_TMP_ACTIONS
Keep a SimAction for each temporary variable read and write
refs
​
​
TRUE_RET_EMULATION_GUARD
With DO_RET_EMULATION, add fake returns with guard condition true instead of false
​
static
​
UNDER_CONSTRAINED_SYMEXEC
Enable under-constrained symbolic execution
​
​
​
UNICORN
Use unicorn engine to execute symbolically when data is concrete
unicorn
tracing
Oppologist
UNICORN_AGGRESSIVE_CONCRETIZATION
Concretize any register variable unicorn tries to access
​
​
Oppologist
UNICORN_HANDLE_TRANSMIT_SYSCALL
CGC: handle the transmit syscall without leaving unicorn
unicorn
tracing
​
UNICORN_SYM_REGS_SUPPORT
Attempt to stay in unicorn even in the presence of symbolic registers by checking that the tainted registers are unused at every step
unicorn
tracing
​
UNICORN_THRESHOLD_CONCRETIZATION
Concretize variables if they prevent unicorn from executing too often
​
​
​
UNICORN_TRACK_BBL_ADDRS
Keep state.history.bbl_addrs up to date when using unicorn
unicorn
tracing
​
UNICORN_TRACK_STACK_POINTERS
Track a list of the stack pointer's value at each block in state.scratch.stack_pointer_list
unicorn
​
​
UNICORN_ZEROPAGE_GUARD
Prevent unicorn from mapping the zero page into memory
​
​
​
UNINITIALIZED_ACCESS_AWARENESS
Broken/unused?
​
​
​
UNSUPPORTED_BYPASS_ZERO_DEFAULT
When using the resilience options, return zero instead of an unconstrained symbol
​
​
​
USE_SIMPLIFIED_CCALLS
Use a "simplified" set of ccalls optimized for specific cases
​
static
​
USE_SYSTEM_TIMES
In library functions and syscalls and hardware instructions accessing clock data, retrieve the real value from the host system.
​
tracing
​
VALIDATE_APPROXIMATIONS
Debug: When performing approximations, ensure that the approximation is sound by calling into z3
​
​
​
ZERO_FILL_UNCONSTRAINED_MEMORY
Make the value of memory read from an uninitialized address zero instead of an unconstrained symbol
​
tracing
​

List of Claripy Operations

Changelog

Contents

State Modes
Option Sets
Options

Set name	Description
`common_options`	Options necessary for basic execution
`symbolic`	Options necessary for basic symbolic execution
`resilience`	Options that harden angr's emulation against unsupported operations, attempting to carry on by treating the result as an unconstrained symbolic value and logging the occasion to `state.history.events`.
`refs`	Options that cause angr to keep a log of all the memory, register, and temporary references complete with dependency information in `history.actions`. This option consumes a lot of memory, so be careful!
`approximation`	Options that enable approximations of constraint solves via value-set analysis instead of calling into z3
`simplification`	Options that cause data to be run through z3's simplifiers before it reaches memory or register storage
`unicorn`	Options that enable the unicorn engine for executing on concrete data

Option name	Description	Sets	Modes	Implicit adds
`ABSTRACT_MEMORY`	Use `SimAbstractMemory` to model memory as discrete regions		`static`
`ABSTRACT_SOLVER`	Allow splitting constraint sets during simplification		`static`
`ACTION_DEPS`	Track dependencies in SimActions
`APPROXIMATE_GUARDS`	Use VSA when evaluating guard conditions
`APPROXIMATE_MEMORY_INDICES`	Use VSA when evaluating memory indices	`approximation`	`symbolic_approximating`
`APPROXIMATE_MEMORY_SIZES`	Use VSA when evaluating memory load/store sizes	`approximation`	`symbolic_approximating`
`APPROXIMATE_SATISFIABILITY`	Use VSA when evaluating state satisfiability	`approximation`	`symbolic_approximating`
`AST_DEPS`	Enables dependency tracking for all claripy ASTs			During execution
`AUTO_REFS`	An internal option used to track dependencies in SimProcedures			During execution
`AVOID_MULTIVALUED_READS`	Return a symbolic value without touching memory for any read that has a symbolic address		`fastpath`
`AVOID_MULTIVALUED_WRITES`	Do not perfrom any write that has a symbolic address		`fastpath`
`BEST_EFFORT_MEMORY_STORING`	Handle huge writes of symbolic size by pretending they are actually smaller		`static`, `fastpath`
`BLOCK_SCOPE_CONSTRAINTS`	Clear the constraint list at the end of each block		`static`
`BREAK_SIRSB_END`	Debug: trigger a breakpoint at the end of each block
`BREAK_SIRSB_START`	Debug: trigger a breakpoint at the start of each block
`BREAK_SIRSTMT_END`	Debug: trigger a breakpoint at the end of each IR statement
`BREAK_SIRSTMT_START`	Debug: trigger a breakpoint at the start of each IR statement
`BYPASS_ERRORED_IRCCALL`	Treat clean helpers that fail with errors as returning unconstrained symbolic values	`resilience`	`fastpath`, `tracing`
`BYPASS_ERRORED_IROP`	Treat operations that fail with errors as returning unconstrained symbolic values	`resilience`	`fastpath`, `tracing`
`BYPASS_UNSUPPORTED_IRCCALL`	Treat unsupported clean helpers as returning unconstrained symbolic values	`resilience`	`fastpath`, `tracing`
`BYPASS_UNSUPPORTED_IRDIRTY`	Treat unsupported dirty helpers as returning unconstrained symbolic values	`resilience`	`fastpath`, `tracing`
`BYPASS_UNSUPPORTED_IREXPR`	Treat unsupported IR expressions as returning unconstrained symbolic values	`resilience`	`fastpath`, `tracing`
`BYPASS_UNSUPPORTED_IROP`	Treat unsupported operations as returning unconstrained symbolic values	`resilience`	`fastpath`, `tracing`
`BYPASS_UNSUPPORTED_IRSTMT`	Treat unsupported IR statements as returning unconstrained symbolic values	`resilience`	`fastpath`, `tracing`
`BYPASS_UNSUPPORTED_SYSCALL`	Treat unsupported syscalls as returning unconstrained symbolic values	`resilience`	`fastpath`, `tracing`
`BYPASS_VERITESTING_EXCEPTIONS`	Discard emulation errors during veritesting	`resilience`	`fastpath`, `tracing`
`CACHELESS_SOLVER`	enable `SolverCacheless`
`CALLLESS`	Emulate call instructions as an unconstraining of the return value register
`CGC_ENFORCE_FD`	CGC: make sure all reads and writes go to stdin and stdout, respectively
`CGC_NON_BLOCKING_FDS`	CGC: always report "data available" in fdwait
`CGC_NO_SYMBOLIC_RECEIVE_LENGTH`	CGC: always read the maximum amount of data requested in the receive syscall
`COMPOSITE_SOLVER`	Enable `SolverComposite` for independent constraint set optimization	`symbolic`	all except `static`
`CONCRETIZE`	Concretize all symbolic expressions encountered during emulation
`CONCRETIZE_SYMBOLIC_FILE_READ_SIZES`	Concreteize the sizes of file reads
`CONCRETIZE_SYMBOLIC_WRITE_SIZES`	Concretize the sizes of symbolic writes to memory
`CONSERVATIVE_READ_STRATEGY`	Do not use SimConcretizationStrategyAny for reads; in case of read address concretization failures, return an unconstrained symbolic value
`CONSERVATIVE_WRITE_STRATEGY`	Do not use SimConcretizationStrategyAny for writes; in case of write address concretization failures, treat the store as a no-op
`CONSTRAINT_TRACKING_IN_SOLVER`	Set `track=True` for making claripy Solvers; enable use of `unsat_core`
`COW_STATES`	Copy states instead of mutating the initial state directly	`common_options`	all
`DOWNSIZE_Z3`	Downsize the claripy solver whenever possible to save memory
`DO_CCALLS`	Perform IR clean calls	`symbolic`	all except `fastpath`
`DO_GETS`	Perform IR register reads	`common_options`	all
`DO_LOADS`	Perform IR memory loads	`common_options`	all
`DO_OPS`	Perform IR computation operations	`common_options`	all
`DO_PUTS`	Perform IR register writes	`common_options`	all
`DO_RET_EMULATION`	For each `Ijk_Call` successor, add a corresponding `Ijk_FakeRet` successor		`static`, `fastpath`
`DO_STORES`	Perform IR memory stores	`common_options`	all
`EFFICIENT_STATE_MERGING`	Keep in memory any state that might be a common ancestor in a merge			Veritesting
`ENABLE_NX`	When in conjunction with `STRICT_PAGE_ACCESS`, raise a SimSegfaultException on executing non-executable memory			Automatically if supported
`EXCEPTION_HANDLING`	Ask all SimExceptions raised during execution to be handled by the SimOS		`tracing`
`FAST_MEMORY`	Use `SimFastMemory` for memory storage
`FAST_REGISTERS`	Use `SimFastMemory` for register storage		`fastpath`
`INITIALIZE_ZERO_REGISTERS`	Treat the initial value of registers as zero instead of unconstrained symbolic	`unicorn`	`tracing`
`INSTRUCTION_SCOPE_CONSTRAINTS`	Clear the constraint list at the end of each instruction
`KEEP_IP_SYMBOLIC`	Don't try to concretize successor states with symbolic instruction pointers
`KEEP_MEMORY_READS_DISCRETE`	In abstract memory, handle failed loads by returning a DCIS?
`LAZY_SOLVES`	Don't check satisfiability until absolutely necessary
`MEMORY_SYMBOLIC_BYTES_MAP`	Maintain a mapping of symbolic variable to which memory address it "really" corresponds to, at the paged memory level?
`NO_SYMBOLIC_JUMP_RESOLUTION`	Do not attempt to flatten symbolic-ip successors into discrete targets		`fastpath`
`NO_SYMBOLIC_SYSCALL_RESOLUTION`	Do not attempt to flatten symbolic-syscall-number successors into discrete targets		`fastpath`
`OPTIMIZE_IR`	Use LibVEX's optimization	`common_options`	all
`REGION_MAPPING`	Maintain a mapping of symbolic variable to which memory region it corresponds to, at the abstract memory level		`static`
`REPLACEMENT_SOLVER`	Enable `SolverReplacement`
`REVERSE_MEMORY_HASH_MAP`	Maintain a mapping from AST hash to which addresses it is present in
`REVERSE_MEMORY_NAME_MAP`	Maintain a mapping from symbolic variable name to which addresses it is present in, required for `memory.replace_all`		`static`
`SIMPLIFY_CONSTRAINTS`	Run added constraints through z3's simplifcation
`SIMPLIFY_EXIT_GUARD`	Run branch guards through z3's simplification
`SIMPLIFY_EXIT_STATE`	Perform simplification on all successor states generated
`SIMPLIFY_EXIT_TARGET`	Run jump/call/branch targets through z3's simplification
`SIMPLIFY_EXPRS`	Run the results of IR expressions through z3's simplification
`SIMPLIFY_MEMORY_READS`	Run the results of memory reads through z3's simplification
`SIMPLIFY_MEMORY_WRITES`	Run values stored to memory through z3's simplification	`simplification`, `common_options`	`symbolic`, `symbolic_approximating`, `tracing`
`SIMPLIFY_REGISTER_READS`	Run values read from registers through z3's simplification
`SIMPLIFY_REGISTER_WRITES`	Run values written to registers through z3's simplification	`simplification`, `common_options`	`symbolic`, `symbolic_approximating`, `tracing`
`SIMPLIFY_RETS`	Run values returned from SimProcedures through z3's simplification
`STRICT_PAGE_ACCESS`	Raise a SimSegfaultException when attempting to interact with memory in a way not permitted by the current permissions		`tracing`
`SUPER_FASTPATH`	Only execute the last four instructions of each block
`SUPPORT_FLOATING_POINT`	When disabled, throw an UnsupportedIROpError when encountering floating point operations	`common_options`	all
`SYMBOLIC`	Enable constraint solving?	`symbolic`	`symbolic`, `symbolic_approximating`, `fastpath`
`SYMBOLIC_INITIAL_VALUES`	make `state.solver.Unconstrained` return a symbolic value instead of zero	`symbolic`	all
`SYMBOLIC_TEMPS`	Treat each IR temporary as a symbolic variable; treat stores to them as constraint addition
`SYMBOLIC_WRITE_ADDRESSES`	Allow writes with symbolic addresses to be processed by concretization strategies; when disabled, only allow for variables annotated with the "multiwrite" annotation
`TRACK_CONSTRAINTS`	When disabled, don't keep any constraints added to the state	`symbolic`	all
`TRACK_CONSTRAINT_ACTIONS`	Keep a SimAction for each constraint added	`refs`
`TRACK_JMP_ACTIONS`	Keep a SimAction for each jump or branch	`refs`
`TRACK_MEMORY_ACTIONS`	Keep a SimAction for each memory read and write	`refs`
`TRACK_MEMORY_MAPPING`	Keep track of which pages are mapped into memory and which are not	`common_options`	all
`TRACK_OP_ACTIONS`	Keep a SimAction for each IR operation		`fastpath`
`TRACK_REGISTER_ACTIONS`	Keep a SimAction for each register read and write	`refs`
`TRACK_SOLVER_VARIABLES`	Maintain a listing of all the variables in all the constraints in the solver
`TRACK_TMP_ACTIONS`	Keep a SimAction for each temporary variable read and write	`refs`
`TRUE_RET_EMULATION_GUARD`	With `DO_RET_EMULATION`, add fake returns with guard condition true instead of false		`static`
`UNDER_CONSTRAINED_SYMEXEC`	Enable under-constrained symbolic execution
`UNICORN`	Use unicorn engine to execute symbolically when data is concrete	`unicorn`	`tracing`	Oppologist
`UNICORN_AGGRESSIVE_CONCRETIZATION`	Concretize any register variable unicorn tries to access			Oppologist
`UNICORN_HANDLE_TRANSMIT_SYSCALL`	CGC: handle the transmit syscall without leaving unicorn	`unicorn`	`tracing`
`UNICORN_SYM_REGS_SUPPORT`	Attempt to stay in unicorn even in the presence of symbolic registers by checking that the tainted registers are unused at every step	`unicorn`	`tracing`
`UNICORN_THRESHOLD_CONCRETIZATION`	Concretize variables if they prevent unicorn from executing too often
`UNICORN_TRACK_BBL_ADDRS`	Keep `state.history.bbl_addrs` up to date when using unicorn	`unicorn`	`tracing`
`UNICORN_TRACK_STACK_POINTERS`	Track a list of the stack pointer's value at each block in `state.scratch.stack_pointer_list`	`unicorn`
`UNICORN_ZEROPAGE_GUARD`	Prevent unicorn from mapping the zero page into memory
`UNINITIALIZED_ACCESS_AWARENESS`	Broken/unused?
`UNSUPPORTED_BYPASS_ZERO_DEFAULT`	When using the resilience options, return zero instead of an unconstrained symbol
`USE_SIMPLIFIED_CCALLS`	Use a "simplified" set of ccalls optimized for specific cases		`static`
`USE_SYSTEM_TIMES`	In library functions and syscalls and hardware instructions accessing clock data, retrieve the real value from the host system.		`tracing`
`VALIDATE_APPROXIMATIONS`	Debug: When performing approximations, ensure that the approximation is sound by calling into z3
`ZERO_FILL_UNCONSTRAINED_MEMORY`	Make the value of memory read from an uninitialized address zero instead of an unconstrained symbol		`tracing`

Mode name	Description
`symbolic`	The default mode. Useful for most emulation and analysis tasks.
`symbolic_approximating`	Symbolic mode, but enables approximations for constraint solving.
`static`	A preset useful for static analysis. The memory model becomes an abstract region-mapping system, "fake return" successors skipping calls are added, and more.
`fastpath`	A preset for extremely lightweight static analysis. Executing will skip all intensive processing to give a quick view of the behavior of code.
`tracing`	A preset for attempting to execute concretely through a program with a given input. Enables unicorn, enables resilience options, and will attempt to emulate access violations correctly.