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/* ----------------------------------------------------------------------------
* $Id: InfoTables.h,v 1.7 1999/01/26 16:16:21 simonm Exp $
*
* Info Tables
*
* -------------------------------------------------------------------------- */
#ifndef INFOTABLES_H
#define INFOTABLES_H
/* -----------------------------------------------------------------------------
Profiling info
-------------------------------------------------------------------------- */
#ifdef PROFILING
#define PROF_INFO_WORDS n
typedef struct {
/* nothing yet */
} StgProfInfo;
#else /* !PROFILING */
#define PROF_INFO_WORDS 0
typedef struct {
/* empty */
} StgProfInfo;
#endif /* PROFILING */
/* -----------------------------------------------------------------------------
Parallelism info
-------------------------------------------------------------------------- */
#ifdef PAR
#define PAR_INFO_WORDS 0
typedef struct {
/* empty */
} StgParInfo;
#else /* !PAR */
#define PAR_INFO_WORDS 0
typedef struct {
/* empty */
} StgParInfo;
#endif /* PAR */
/* -----------------------------------------------------------------------------
Debugging info
-------------------------------------------------------------------------- */
#ifdef DEBUG_CLOSURE
#define DEBUG_INFO_WORDS n
typedef struct {
... whatever ...
} StgDebugInfo;
#else /* !DEBUG_CLOSURE */
#define DEBUG_INFO_WORDS 0
typedef struct {
/* empty */
} StgDebugInfo;
#endif /* DEBUG_CLOSURE */
/* -----------------------------------------------------------------------------
Closure Types
If you add or delete any closure types, don't forget to update
ClosureTypes.h for the native code generator. This is a temporary
measure (I hope).
-------------------------------------------------------------------------- */
typedef enum {
INVALID_OBJECT /* Object tag 0 raises an internal error */
, CONSTR
, CONSTR_1_0
, CONSTR_0_1
, CONSTR_2_0
, CONSTR_1_1
, CONSTR_0_2
, CONSTR_INTLIKE
, CONSTR_CHARLIKE
, CONSTR_STATIC
, CONSTR_NOCAF_STATIC
, FUN
, FUN_1_0
, FUN_0_1
, FUN_2_0
, FUN_1_1
, FUN_0_2
, FUN_STATIC
, THUNK
, THUNK_1_0
, THUNK_0_1
, THUNK_2_0
, THUNK_1_1
, THUNK_0_2
, THUNK_STATIC
, THUNK_SELECTOR
, BCO
, AP_UPD
, PAP /* should be called AP_NUPD */
, IND
, IND_OLDGEN
, IND_PERM
, IND_OLDGEN_PERM
, IND_STATIC
, CAF_UNENTERED
, CAF_ENTERED
, CAF_BLACKHOLE
, RET_BCO
, RET_SMALL
, RET_VEC_SMALL
, RET_BIG
, RET_VEC_BIG
, RET_DYN
, UPDATE_FRAME
, CATCH_FRAME
, STOP_FRAME
, SEQ_FRAME
, BLACKHOLE
, BLACKHOLE_BQ
, MVAR
, ARR_WORDS
, MUT_ARR_WORDS
, MUT_ARR_PTRS
, MUT_ARR_PTRS_FROZEN
, MUT_VAR
, WEAK
, FOREIGN
, STABLE_NAME
, TSO
, BLOCKED_FETCH
, FETCH_ME
, EVACUATED
, N_CLOSURE_TYPES /* number of distinct closure types */
} StgClosureType;
/* The type flags provide quick access to certain properties of a closure. */
#define _HNF (1<<0) /* head normal form? */
#define _BTM (1<<1) /* bitmap-style layout? */
#define _NS (1<<2) /* non-sparkable */
#define _STA (1<<3) /* static? */
#define _THU (1<<4) /* thunk? */
#define _MUT (1<<5) /* mutable? */
#define _UPT (1<<6) /* unpointed? */
#define _SRT (1<<7) /* has an SRT? */
#define isSTATIC(flags) ((flags)&_STA)
#define isMUTABLE(flags) ((flags) &_MUT)
#define closure_STATIC(closure) ( get_itbl(closure)->flags & _STA)
#define closure_SHOULD_SPARK(closure) (!(get_itbl(closure)->flags & _NS))
#define closure_MUTABLE(closure) ( get_itbl(closure)->flags & _MUT)
#define closure_UNPOINTED(closure) ( get_itbl(closure)->flags & _UPT)
/* HNF BTM NS STA THU MUT UPT SRT */
#define FLAGS_CONSTR (_HNF| _NS )
#define FLAGS_CONSTR_1_0 (_HNF| _NS )
#define FLAGS_CONSTR_0_1 (_HNF| _NS )
#define FLAGS_CONSTR_2_0 (_HNF| _NS )
#define FLAGS_CONSTR_1_1 (_HNF| _NS )
#define FLAGS_CONSTR_0_2 (_HNF| _NS )
#define FLAGS_CONSTR_STATIC (_HNF| _NS|_STA )
#define FLAGS_CONSTR_NOCAF_STATIC (_HNF| _NS|_STA )
#define FLAGS_FUN (_HNF| _NS| _SRT )
#define FLAGS_FUN_1_0 (_HNF| _NS )
#define FLAGS_FUN_0_1 (_HNF| _NS )
#define FLAGS_FUN_2_0 (_HNF| _NS )
#define FLAGS_FUN_1_1 (_HNF| _NS )
#define FLAGS_FUN_0_2 (_HNF| _NS )
#define FLAGS_FUN_STATIC (_HNF| _NS|_STA| _SRT )
#define FLAGS_THUNK ( _BTM| _THU| _SRT )
#define FLAGS_THUNK_1_0 ( _BTM| _THU| _SRT )
#define FLAGS_THUNK_0_1 ( _BTM| _THU| _SRT )
#define FLAGS_THUNK_2_0 ( _BTM| _THU| _SRT )
#define FLAGS_THUNK_1_1 ( _BTM| _THU| _SRT )
#define FLAGS_THUNK_0_2 ( _BTM| _THU| _SRT )
#define FLAGS_THUNK_STATIC ( _BTM| _STA|_THU| _SRT )
#define FLAGS_THUNK_SELECTOR ( _BTM| _THU| _SRT )
#define FLAGS_BCO (_HNF| _NS )
#define FLAGS_CAF_UNENTERED 0 /* Do we still use these? */
#define FLAGS_CAF_ENTERED 0
#define FLAGS_CAF_BLACKHOLE ( _BTM|_NS| _UPT )
#define FLAGS_AP_UPD ( _BTM| _THU )
#define FLAGS_PAP (_HNF| _NS )
#define FLAGS_IND 0
#define FLAGS_IND_OLDGEN 0
#define FLAGS_IND_PERM 0
#define FLAGS_IND_OLDGEN_PERM 0
#define FLAGS_IND_STATIC ( _STA )
#define FLAGS_EVACUATED 0
#define FLAGS_ARR_WORDS (_HNF| _NS| _UPT )
#define FLAGS_MUT_ARR_WORDS (_HNF| _NS| _MUT|_UPT )
#define FLAGS_MUT_ARR_PTRS (_HNF| _NS| _MUT|_UPT )
#define FLAGS_MUT_ARR_PTRS_FROZEN (_HNF| _NS| _MUT|_UPT )
#define FLAGS_MUT_VAR (_HNF| _NS| _MUT|_UPT )
#define FLAGS_FOREIGN (_HNF| _NS| _UPT )
#define FLAGS_STABLE_NAME (_HNF| _NS| _UPT )
#define FLAGS_WEAK (_HNF| _NS| _UPT )
#define FLAGS_BLACKHOLE ( _NS| _UPT )
#define FLAGS_BLACKHOLE_BQ ( _NS| _MUT|_UPT )
#define FLAGS_MVAR (_HNF| _NS| _MUT|_UPT )
#define FLAGS_FETCH_ME (_HNF| _NS )
#define FLAGS_TSO (_HNF| _NS| _MUT|_UPT )
#define FLAGS_RET_BCO ( _BTM )
#define FLAGS_RET_SMALL ( _BTM| _SRT)
#define FLAGS_RET_VEC_SMALL ( _BTM| _SRT)
#define FLAGS_RET_BIG ( _SRT)
#define FLAGS_RET_VEC_BIG ( _SRT)
#define FLAGS_RET_DYN ( _SRT)
#define FLAGS_CATCH_FRAME ( _BTM )
#define FLAGS_STOP_FRAME ( _BTM )
#define FLAGS_SEQ_FRAME ( _BTM )
#define FLAGS_UPDATE_FRAME ( _BTM )
/* -----------------------------------------------------------------------------
Info Tables
-------------------------------------------------------------------------- */
/* A large bitmap. Small 32-bit ones live in the info table, but sometimes
* 32 bits isn't enough and we have to generate a larger one. (sizes
* differ for 64-bit machines.
*/
typedef struct {
StgWord size;
StgWord bitmap[0];
} StgLargeBitmap;
/*
* Stuff describing the closure layout. Well, actually, it might
* contain the selector index for a THUNK_SELECTOR. If we're on a
* 64-bit architecture then we can enlarge some of these fields, since
* the union contains a pointer field.
*/
typedef union {
StgWord bitmap; /* bit pattern, 1 = pointer, 0 = non-pointer */
StgWord selector_offset; /* used in THUNK_SELECTORs */
StgLargeBitmap* large_bitmap; /* pointer to large bitmap structure */
#if SIZEOF_VOID_P == 8
struct {
StgNat32 ptrs; /* number of pointers */
StgNat32 nptrs; /* number of non-pointers */
} payload;
#else
struct {
StgNat16 ptrs; /* number of pointers */
StgNat16 nptrs; /* number of non-pointers */
} payload;
#endif
} StgClosureInfo;
/*
* Info tables. All info tables are the same type, to simplify code
* generation. However, the mangler removes any unused SRT fields
* from the asm to save space (convention: if srt_len is zero, or the
* type is a CONSTR_ type, then the SRT field isn't present.
*/
typedef StgClosure* StgSRT[];
typedef struct _StgInfoTable {
StgSRT *srt; /* pointer to the SRT table */
StgParInfo par;
StgProfInfo prof;
StgDebugInfo debug;
StgClosureInfo layout; /* closure layout info (pointer-sized) */
#if SIZEOF_VOID_P == 8
StgNat16 flags; /* } */
StgClosureType type : 16; /* } These 4 elements fit into 64 bits */
StgNat32 srt_len; /* } */
#else
StgNat8 flags; /* } */
StgClosureType type : 8; /* } These 4 elements fit into 32 bits */
StgNat16 srt_len; /* } */
#endif
#if USE_MINIINTERPRETER
StgFunPtr (*vector)[];
StgFunPtr entry;
#else
StgCode code[0];
#endif
} StgInfoTable;
#endif /* INFOTABLES_H */
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