GHC.ByteCode.Types

Wrapper for a ByteArray#. The phantom type tells what elements are stored in the ByteArray#. Creating a ByteArray# can be achieved using UArray's API, where the underlying ByteArray# can be unpacked.

A libffi ffi_cif function prototype.

Maximum nativeCallStackSpillSize for which we use a small stg_ctoi_tN frame (no old_spill slot, no TSO access) instead of the generic stg_ctoi_t frame.

Store elements in a flattened representation.

A FlatBag is a data structure that stores an ordered list of elements in a flat structure, avoiding the overhead of a linked list. Use this data structure, if the code requires the following properties:

• Elements are stored in a long-lived object, and benefit from a flattened representation.

• The FlatBag will be traversed but not extended or filtered.

• The number of elements should be known.

• Sharing of the empty case improves memory behaviour.

A FlagBag aims to have as little overhead as possible to store its elements. To achieve that, it distinguishes between the empty case, singleton, tuple and general case. Thus, we only pay for the additional three words of an Array if we have at least three elements.

Calculate the size of

Convert a SizedSeq into its flattened representation. A 'FlatBag a' is more memory efficient than '[a]', if no further modification is necessary.

Get all elements that are stored in the FlatBag.

All the information about the source-relevant breakpoints for a module

This information is constructed once during desugaring (with mkModBreaks) from breakpoint ticks and fixed/unchanged from there on forward. It could be exported as an abstract datatype because it should never be updated after construction, only queried.

The arrays can be indexed using the int in the corresponding BreakpointId (i.e. the BreakpointId whose Module matches the Module corresponding to these ModBreaks) with the accessors modBreaks_locs, modBreaks_vars, and modBreaks_decls.

Breakpoint identifier.

Indexes into the structures in the ModBreaks created during desugaring (after inserting the breakpoint ticks in the expressions). See Note [Breakpoint identifiers]

Breakpoint tick index newtype BreakTickIndex = BreakTickIndex Int deriving (Eq, Ord, Data, Ix, NFData, Outputable)

Internal mod breaks store the runtime-relevant information of breakpoints.

Importantly, it maps InternalBreakpointIds to CgBreakInfo.

InternalModBreaks are constructed during bytecode generation and stored in CompiledByteCode afterwards.

Information about a breakpoint that we know at code-generation time In order to be used, this needs to be hydrated relative to the current HscEnv by hydrateCgBreakInfo. Everything here can be fully forced and that's critical for preventing space leaks (see #22530)

Fully force an InternalModBreaks value