Struct probe_rs::debug::variable_cache::VariableCache
source · pub struct VariableCache { /* private fields */ }
Expand description
VariableCache stores available Variable
s, and provides methods to create and navigate the parent-child relationships of the Variables.
Implementations§
source§impl VariableCache
impl VariableCache
sourcepub fn new() -> Self
pub fn new() -> Self
Creates a new VariableCache
.
sourcepub fn cache_variable(
&mut self,
parent_key: Option<i64>,
cache_variable: Variable,
core: &mut Core<'_>
) -> Result<Variable, Error>
pub fn cache_variable(
&mut self,
parent_key: Option<i64>,
cache_variable: Variable,
core: &mut Core<'_>
) -> Result<Variable, Error>
Performs an add or update of a probe_rs::debug::Variable
to the cache, consuming the input and returning a Clone.
- Add operation: If the
Variable::variable_key
is 0, then assign a key and store it in the cache.- Return an updated Clone of the stored variable
- Update operation: If the
Variable::variable_key
is > 0- If the key value exists in the cache, update it, Return an updated Clone of the variable.
- If the key value doesn’t exist in the cache, Return an error.
- For all operations, update the
parent_key
. A value of None means there are no parents for this variable.- Validate that the supplied
Variable::parent_key
is a valid entry in the cache.
- Validate that the supplied
- If appropriate, the
Variable::value
is updated from the core memory, and can be used by the calling function.
sourcepub fn get_variable_by_key(&self, variable_key: i64) -> Option<Variable>
pub fn get_variable_by_key(&self, variable_key: i64) -> Option<Variable>
Retrieve a clone of a specific Variable
, using the variable_key
.
sourcepub fn get_variable_by_name_and_parent(
&self,
variable_name: &VariableName,
parent_key: Option<i64>
) -> Option<Variable>
pub fn get_variable_by_name_and_parent(
&self,
variable_name: &VariableName,
parent_key: Option<i64>
) -> Option<Variable>
Retrieve a clone of a specific Variable
, using the name
and parent_key
.
If there is more than one, it will be logged (tracing::error!), and only the last will be returned.
sourcepub fn get_variable_by_name(
&self,
variable_name: &VariableName
) -> Option<Variable>
pub fn get_variable_by_name(
&self,
variable_name: &VariableName
) -> Option<Variable>
Retrieve a clone of a specific Variable
, using the name
.
If there is more than one, it will be logged (tracing::warn!), and only the first will be returned.
It is possible for a hierarchy of variables in a cache to have duplicate names under different parents.
sourcepub fn get_children(
&self,
parent_key: Option<i64>
) -> Result<Vec<Variable>, Error>
pub fn get_children(
&self,
parent_key: Option<i64>
) -> Result<Vec<Variable>, Error>
Retrieve clone
d version of all the children of a Variable
.
If parent_key == None
, it will return all the top level variables (no parents) in this cache.
sourcepub fn has_children(&self, parent_variable: &Variable) -> Result<bool, Error>
pub fn has_children(&self, parent_variable: &Variable) -> Result<bool, Error>
Check if a Variable
has any children. This also validates that the parent exists in the cache, before attempting to check for children.
sourcepub fn adopt_grand_children(
&mut self,
parent_variable: &Variable,
obsolete_child_variable: &Variable
) -> Result<(), Error>
pub fn adopt_grand_children(
&mut self,
parent_variable: &Variable,
obsolete_child_variable: &Variable
) -> Result<(), Error>
Sometimes DWARF uses intermediate nodes that are not part of the coded variable structure.
When we encounter them, the children of such intermediate nodes are assigned to the parent of the intermediate node, and we discard the intermediate nodes from the DebugInfo::VariableCache
Similarly, while resolving VariableNodeType::is_deferred(), i.e. ‘lazy load’ of variables, we need to create intermediate variables that are eliminated here.
NOTE: For all other situations, this function will silently do nothing.
Trait Implementations§
source§impl Debug for VariableCache
impl Debug for VariableCache
Auto Trait Implementations§
impl RefUnwindSafe for VariableCache
impl Send for VariableCache
impl Sync for VariableCache
impl Unpin for VariableCache
impl UnwindSafe for VariableCache
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