Enum jit_allocator::virtual_memory::HardenedRuntimeFlags

#[repr(u32)]
pub enum HardenedRuntimeFlags {
    None,
    Enabled,
    MapJit,
    EnabledMapJit,
}

Hardened runtime flags.

Variants

None

No flags

Enabled

Hardened runtime is enabled - it’s not possible to have “Write & Execute” memory protection. The runtime enforces W^X (either write or execute).

Note

If the runtime is hardened it means that an operating system specific protection is used. For example on Apple OSX it’s possible to allocate memory with MAP_JIT flag and then use pthread_jit_write_protect_np() to temporarily swap access permissions for the current thread. Dual mapping is also a possibility on X86/X64 architecture.

MapJit

Read+Write+Execute can only be allocated with MAP_JIT flag (Apple specific, only available on OSX).

EnabledMapJit

Trait Implementations

impl Clone for HardenedRuntimeFlags

fn clone(&self) -> HardenedRuntimeFlags

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for HardenedRuntimeFlags

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for HardenedRuntimeFlags

fn default() -> HardenedRuntimeFlags

Returns the “default value” for a type.

impl Hash for HardenedRuntimeFlags

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for HardenedRuntimeFlags

fn cmp(&self, other: &HardenedRuntimeFlags) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Selfwhere Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval.

impl PartialEq<HardenedRuntimeFlags> for HardenedRuntimeFlags

fn eq(&self, other: &HardenedRuntimeFlags) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd<HardenedRuntimeFlags> for HardenedRuntimeFlags

fn partial_cmp(&self, other: &HardenedRuntimeFlags) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for HardenedRuntimeFlags

impl Eq for HardenedRuntimeFlags

impl StructuralEq for HardenedRuntimeFlags

impl StructuralPartialEq for HardenedRuntimeFlags