Struct fxprof_processed_profile::LibMappings

pub struct LibMappings<T> { /* private fields */ }

Keeps track of mapped libraries in an address space. Stores a value for each mapping, and allows efficient lookup of that value based on an address.

Implementations

impl<T> LibMappings<T>

pub fn new() -> Self

Creates a new empty instance.

pub fn add_mapping( &mut self, start_avma: u64, end_avma: u64, relative_address_at_start: u32, value: T )

Add a mapping to this address space. Any existing mappings which overlap with the new mapping are removed.

start_avma and end_avma describe the address range that this mapping occupies.

AVMA = “actual virtual memory address”

relative_address_at_start is the “relative address” which corresponds to start_avma, in the library that is mapped in this mapping. This is zero if start_avm is the base address of the library.

A relative address is a u32 value which is relative to the library base address. So you will usually set relative_address_at_start to start_avma - base_avma.

For ELF binaries, the base address is the AVMA of the first segment, i.e. the start_avma of the mapping created by the first ELF LOAD command.

For mach-O binaries, the base address is the vmaddr of the __TEXT segment.

For Windows binaries, the base address is the image load address.

pub fn remove_mapping(&mut self, start_avma: u64) -> Option<(u32, T)>

Remove a mapping which starts at the given address. If found, this returns the relative_address_at_start and the associated value of the mapping.

pub fn clear(&mut self)

Clear all mappings.

pub fn convert_address(&self, avma: u64) -> Option<(u32, &T)>

Converts an absolute address (AVMA, actual virtual memory address) into a relative address and the mapping’s associated value.

Trait Implementations

impl<T: Clone> Clone for LibMappings<T>

fn clone(&self) -> LibMappings<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for LibMappings<T>

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

Formats the value using the given formatter.

impl<T> Default for LibMappings<T>

fn default() -> Self

Returns the “default value” for a type.