Returns a [String] representing the current call stack. This can be useful for debugging.

The implementation uses the call-stack simulation maintained by the profiler, so it only works if the program was compiled with -prof and contains suitable SCC annotations (e.g. by using -fprof-auto). Otherwise, the list returned is likely to be empty or uninformative.

Since: base-4.5.0.0

Get the stack trace attached to an object.

Since: base-4.5.0.0

Get information about where a value originated from. This information is stored statically in a binary when `-finfo-table-map` is enabled. The source positions will be greatly improved by also enabled debug information with `-g3`. Finally you can enable `-fdistinct-constructor-tables` to get more precise information about data constructor allocations.

The information is collect by looking at the info table address of a specific closure and then consulting a specially generated map (by `-finfo-table-map`) to find out where we think the best source position to describe that info table arose from.

A cost-centre stack from GHC's cost-center profiler.

A cost-centre from GHC's cost-center profiler.

Returns the current CostCentreStack (value is nullPtr if the current program was not compiled with profiling support). Takes a dummy argument which can be used to avoid the call to getCurrentCCS being floated out by the simplifier, which would result in an uninformative stack (CAF).

Get the CostCentreStack associated with the given value.

Run a computation with an empty cost-center stack. For example, this is used by the interpreter to run an interpreted computation without the call stack showing that it was invoked from GHC.

Get the CostCentre at the head of a CostCentreStack.

Get the tail of a CostCentreStack.

Get the label of a CostCentre.

Get the module of a CostCentre.

Get the source span of a CostCentre.

Format a CostCentreStack as a list of lines.