Moduleghc-9.14.1GHC2021

GHC.StgToJS.Object

Serialization/deserialization of binary .o files for the JavaScript backend

Contents

JS object
HS object

Synopsis

data ObjectKind
value getObjectKind
value getObjectKindBS
data JSOptions
value defaultJSOptions
value getOptionsFromJsFile
value writeJSObject
value readJSObject
value parseJSObject
value parseJSObjectBS
value putObject
value getObjectHeader
value getObjectBody
value getObject
value readObject
value getObjectBlocks
value readObjectBlocks
value readObjectBlockInfo
value isGlobalBlock
data Object
data IndexEntry
data LocatedBlockInfo
data BlockInfo
data BlockDeps
data BlockLocation
type BlockId
type BlockIds
data BlockRef
data ExportedFun

Packageghc-9.14.1
Exports29
LanguageGHC2021
LicenceBSD-3-Clause
SourceObject.hs

datadata ObjectKind

Source#

Different kinds of object (.o) supported by the JS backend

Constructors

ObjJs
JavaScript source embedded in a .o
ObjHs
JS backend object for Haskell code
ObjCc
Wasm module object as produced by emcc

Instances3Eq, Ord, Show

Eq ObjectKindDefined in ghc-9.14.1 · GHC.StgToJS.Object
Ord ObjectKindDefined in ghc-9.14.1 · GHC.StgToJS.Object
Show ObjectKindDefined in ghc-9.14.1 · GHC.StgToJS.Object

valuegetObjectKind :: FilePath -> IO (Maybe ObjectKind)

Source#

Get the kind of a file object, if any

valuegetObjectKindBS :: ByteString -> Maybe ObjectKind

Source#

Get the kind of an object stored in a bytestring, if any

JS object

datadata JSOptions

Source#

Options obtained from pragmas in JS files

Constructors

JSOptions
- enableCPP :: !Bool
  Enable CPP on the JS file
- emccExtraOptions :: ![String]
  Pass additional options to emcc at link time
- emccExportedFunctions :: ![String]
  Arguments for `-sEXPORTED_FUNCTIONS`
- emccExportedRuntimeMethods :: ![String]
  Arguments for `-sEXPORTED_RUNTIME_METHODS`

Instances4Eq, Ord, Semigroup, Binary

Eq JSOptionsDefined in ghc-9.14.1 · GHC.StgToJS.Object
Ord JSOptionsDefined in ghc-9.14.1 · GHC.StgToJS.Object
Semigroup JSOptionsDefined in ghc-9.14.1 · GHC.StgToJS.Object
Binary JSOptionsDefined in ghc-9.14.1 · GHC.StgToJS.Object

valuedefaultJSOptions :: JSOptions

valuegetOptionsFromJsFile

:: FilePath
Input file
-> IO JSOptions
Parsed options.

Source#

Parse option pragma in JS file

valuewriteJSObject :: JSOptions -> ByteString -> FilePath -> IO ()

Source#

Write a JS object (embed some handwritten JS code)

valuereadJSObject :: FilePath -> IO (JSOptions, ByteString)

Source#

Read a JS object from file

valueparseJSObject :: ReadBinHandle -> IO (JSOptions, ByteString)

Source#

Read a JS object from BinHandle

valueparseJSObjectBS :: ByteString -> IO (JSOptions, ByteString)

Source#

Read a JS object from ByteString

HS object

valueputObject

:: WriteBinHandle
-> ModuleName
module
-> BlockInfo
block infos
-> [ObjBlock]
linkable units and their symbols
-> IO ()

Source#

Given a handle to a Binary payload, add the module, mod_name, its dependencies, deps, and its linkable units to the payload.

valuegetObjectHeader :: ReadBinHandle -> IO (Either String ModuleName)

Source#

Parse object header

valuegetObjectBody :: ReadBinHandle -> ModuleName -> IO Object

Source#

Parse object body. Must be called after a successful getObjectHeader

valuegetObject :: ReadBinHandle -> IO (Maybe Object)

Source#

Parse object

valuereadObject :: FilePath -> IO (Maybe Object)

Source#

Read object from file

The object is still in memory after this (see objHandle).

valuegetObjectBlocks :: Object -> BlockIds -> IO [ObjBlock]

Source#

Get blocks in the object file, using the given filtering function

valuereadObjectBlocks :: FilePath -> BlockIds -> IO [ObjBlock]

Source#

Read blocks in the object file, using the given filtering function

valuereadObjectBlockInfo :: FilePath -> IO (Maybe BlockInfo)

Source#

Reads only the part necessary to get the block info

valueisGlobalBlock :: BlockId -> Bool

Source#

we use the convention that the first block (0) is a module-global block that's always included when something from the module is loaded. everything in a module implicitly depends on the global block. The global block itself can't have dependencies

datadata Object

Source#

A HS object file

Constructors

Object
- objModuleName :: !ModuleName
  name of the module
- objHandle :: !ReadBinHandle
  BinHandle that can be used to read the ObjBlocks
- objPayloadOffset :: !Bin ObjBlock
  Offset of the payload (units)
- objBlockInfo :: !BlockInfo
  Information about blocks
- objIndex :: !Index
  Block index: symbols per block and block offset in the object file

datadata IndexEntry

Constructors

IndexEntry
- idxSymbols :: ![FastString]
  Symbols exported by a block
- idxOffset :: !Bin ObjBlock
  Offset of the block in the object file

Instances1Binary

Binary IndexEntryDefined in ghc-9.14.1 · GHC.StgToJS.Object

datadata LocatedBlockInfo

Constructors

LocatedBlockInfo
- lbi_loc :: !BlockLocation
  Where to find the blocks
- lbi_info :: !BlockInfo
  Block information

datadata BlockInfo

Source#

Information about blocks (linkable units)

Constructors

BlockInfo
- bi_module :: !Module
  Module they were generated from
- bi_must_link :: !BlockIds
  blocks that always need to be linked when this object is loaded (e.g. everything that contains initializer code or foreign exports)
- bi_exports :: !Map ExportedFun BlockId
  exported Haskell functions -> block
- bi_block_deps :: !Array BlockId BlockDeps
  dependencies of each block

Instances2Outputable, Binary

Outputable BlockInfoDefined in ghc-9.14.1 · GHC.StgToJS.Object
Binary BlockInfoDefined in ghc-9.14.1 · GHC.StgToJS.Object

datadata BlockDeps

Constructors

BlockDeps
- blockBlockDeps :: [BlockId]
  dependencies on blocks in this object
- blockFunDeps :: [ExportedFun]
  dependencies on exported symbols in other objects , blockForeignExported :: [ExpFun] , blockForeignImported :: [ForeignRef]

Instances1Binary

Binary BlockDepsDefined in ghc-9.14.1 · GHC.StgToJS.Object

datadata BlockLocation

Source#

Where are the blocks

Constructors

ObjectFile FilePath
In an object file at path
ArchiveFile FilePath
In a Ar file at path
InMemory String Object
In memory

Instances1Outputable

Outputable BlockLocationDefined in ghc-9.14.1 · GHC.StgToJS.Object

typetype BlockId = Int

typetype BlockIds = IntSet

datadata BlockRef

Source#

A BlockRef is a pair of a module and the index of the block in the object file

Constructors

BlockRef
- block_ref_mod :: !Module
  Module
- block_ref_idx :: !BlockId
  Block index in the object file

Instances2Eq, Ord

Eq BlockRefDefined in ghc-9.14.1 · GHC.StgToJS.Object
Ord BlockRefDefined in ghc-9.14.1 · GHC.StgToJS.Object

datadata ExportedFun

Source#

Exported Functions

Constructors

ExportedFun
- funModule :: !Module
  The module containing the function
- funSymbol :: !LexicalFastString
  The function

Instances4Eq, Ord, Outputable, Binary

Eq ExportedFunDefined in ghc-9.14.1 · GHC.StgToJS.Object
Ord ExportedFunDefined in ghc-9.14.1 · GHC.StgToJS.Object
Outputable ExportedFunDefined in ghc-9.14.1 · GHC.StgToJS.Object
Binary ExportedFunDefined in ghc-9.14.1 · GHC.StgToJS.Object

Orphan instances

21 instances