Hi, I find backtrace does not produce frames of my code after a lot of attempts in Android. Therefore, I want to make a home-made backtrace as follows.
Instead of using ? or try!, I will create a macro called my_try! as follows:
macro_rules! my_try {
($expr:expr $(,)?) => {
match $expr {
$crate::result::Result::Ok(val) => val,
$crate::result::Result::Err(err) => {
return $crate::result::Result::Err(err.context($generate_a_number));
}
}
};
}
where err is of type anyhow::Error, and .context($generate_a_number) means that, I will attach a unique number to this error when it is returned from this location. For example, a my_try! usage at file a.rs line 42 may be tied to number 123456, and I output a mapping saying that "123456 means a.rs@line42".
By using this approach, even though the backtrace does not produce what I want, I can still get (pseudo) stack traces. For example, if I finally see an error with context [123456, 234567, ...], then I know this error comes from a.rs@line42, followed by b.rs@line123, etc.
Question: Is this a good/feasible approach? Will I face problems? Does this solution already exist or I have to invent the wheel?
Thanks for any suggestions!