Struct Rv32StackUsage 

pub struct Rv32StackUsage {
    pub contract_address: ContractAddress,
    pub method_id: u64,
    pub sp_initial: u32,
    pub sp_min: u32,
}

What an rv32 guest did with its stack pointer over one invocation.

hogd records one of these per rv32 invocation, when the invocation ends, in Debug builds with HOGD_RV32_STACK_USAGE on – which the prebuilt test_ffi library this crate links is. sp_initial is the first value the guest stored to sp (x2): the stack top its _start established. sp_min is the lowest, the deepest point the stack reached, so bytes_used is their difference. A fused lui sp; addi sp, sp, imm prologue stores only the constant it materializes, so sp_initial is the top the program established, not the lui intermediate.

Fields

contract_address: ContractAddress

The invoked contract.

method_id: u64

The invoked method id.

sp_initial: u32

First value the guest wrote to sp, or SP_UNWRITTEN.

sp_min: u32

Lowest value the guest wrote to sp, or SP_UNWRITTEN.

Implementations

impl Rv32StackUsage

pub fn wrote_sp(&self) -> bool

True if the guest wrote sp at all.

pub fn bytes_used(&self) -> Option<u32>

Bytes of stack the invocation used: sp_initial - sp_min. None if the guest never wrote sp.

Trait Implementations

impl Clone for Rv32StackUsage

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Rv32StackUsage

impl Debug for Rv32StackUsage

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

Formats the value using the given formatter.

impl Eq for Rv32StackUsage

impl PartialEq for Rv32StackUsage

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Rv32StackUsage