A way to programmatically cause GHC to report the cost center stack associated with a value
I find that I often wish I could ask GHC to tell me "where did *that* value come from?" as I debug JHC. Since GHC obviously can track this information, it seems like it would be fairly simple to implement a way for it to report this information as instructed by a running program. Perhaps:
reportCssFor :: a -> b -> b
I wouldn't really have any desire to use this on thunks, since when I want to do this it is usually because I don't like the value (i.e. it isn't in the right normal form), and to know this I must already have evaluated it.
Trac metadata
Trac field | Value |
---|---|
Version | 6.8.2 |
Type | FeatureRequest |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Profiling |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | Unknown |
Architecture | Unknown |