GHC.Internal.Stack.Decode

Decode a StackSnapshot to a stacktrace (a list of StackEntry). The stack trace is created from return frames with according InfoProvEnt entries. To generate them, use the GHC flag -finfo-table-map. If there are no InfoProvEnt entries, an empty list is returned.

Please note:

• To gather StackEntry from libraries, these have to be compiled with -finfo-table-map, too.

• Due to optimizations by GHC (e.g. inlining) the stacktrace may change with different GHC parameters and versions.

• The stack trace is empty (by design) if there are no return frames on the stack. (These are pushed every time when a case ... of scrutinee is evaluated.)

Decode StackSnapshot to a StgStackClosure

The return value is the representation of the StgStack itself.

See Note [Decoding the stack].

Representation for the source location where a return frame was pushed on the stack. This happens every time when a case ... of scrutinee is evaluated.