/* ----------------------------------------------------------------------------
- * $Id: InfoTables.h,v 1.6 1999/01/26 11:12:55 simonm Exp $
+ * $Id: InfoTables.h,v 1.27 2002/05/14 08:15:49 matthewc Exp $
*
+ * (c) The GHC Team, 1998-1999
+ *
* Info Tables
*
* -------------------------------------------------------------------------- */
Profiling info
-------------------------------------------------------------------------- */
-#ifdef PROFILING
-
-#define PROF_INFO_WORDS n
-
typedef struct {
- /* nothing yet */
+ char *closure_type;
+ char *closure_desc;
} StgProfInfo;
-#else /* !PROFILING */
-
-#define PROF_INFO_WORDS 0
-
-typedef struct {
- /* empty */
-} StgProfInfo;
-
-#endif /* PROFILING */
-
/* -----------------------------------------------------------------------------
Parallelism info
-------------------------------------------------------------------------- */
-#ifdef PAR
+#if 0 && (defined(PAR) || defined(GRAN))
-#define PAR_INFO_WORDS 0
+// CURRENTLY UNUSED
+// ToDo: use this in StgInfoTable (mutually recursive) -- HWL
typedef struct {
- /* empty */
+ StgInfoTable *rbh_infoptr; /* infoptr to the RBH */
} StgParInfo;
-#else /* !PAR */
+#endif /* 0 */
-#define PAR_INFO_WORDS 0
+/*
+ Copied from ghc-0.29; ToDo: check this code -- HWL
-typedef struct {
- /* empty */
-} StgParInfo;
+ In the parallel system, all updatable closures have corresponding
+ revertible black holes. When we are assembly-mangling, we guarantee
+ that the revertible black hole code precedes the normal entry code, so
+ that the RBH info table resides at a fixed offset from the normal info
+ table. Otherwise, we add the RBH info table pointer to the end of the
+ normal info table and vice versa.
+
+ Currently has to use a !RBH_MAGIC_OFFSET setting.
+ Still todo: init of par.infoptr field in all infotables!!
+*/
+
+#if defined(PAR) || defined(GRAN)
+
+# ifdef RBH_MAGIC_OFFSET
+
+# error magic offset not yet implemented
+
+# define RBH_INFO_WORDS 0
+# define INCLUDE_RBH_INFO(infoptr)
+
+# define RBH_INFOPTR(infoptr) (((P_)infoptr) - RBH_MAGIC_OFFSET)
+# define REVERT_INFOPTR(infoptr) (((P_)infoptr) + RBH_MAGIC_OFFSET)
+
+# else
-#endif /* PAR */
+# define RBH_INFO_WORDS 1
+# define INCLUDE_RBH_INFO(info) rbh_infoptr : &(info)
+
+# define RBH_INFOPTR(infoptr) (((StgInfoTable *)(infoptr))->rbh_infoptr)
+# define REVERT_INFOPTR(infoptr) (((StgInfoTable *)(infoptr))->rbh_infoptr)
+
+# endif
+
+/* see ParallelRts.h */
+// EXTFUN(RBH_entry);
+//StgClosure *convertToRBH(StgClosure *closure);
+//#if defined(GRAN)
+//void convertFromRBH(StgClosure *closure);
+//#elif defined(PAR)
+//void convertToFetchMe(StgPtr closure, globalAddr *ga);
+//#endif
+
+#endif
+
+/* -----------------------------------------------------------------------------
+ Ticky info
+ -------------------------------------------------------------------------- */
+
+typedef struct {
+ /* empty */
+} StgTickyInfo;
/* -----------------------------------------------------------------------------
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).
+ Closure flags
-------------------------------------------------------------------------- */
-typedef enum {
-
- INVALID_OBJECT /* Object tag 0 raises an internal error */
- , CONSTR
- /* CONSTR_p_np */
- , CONSTR_INTLIKE
- , CONSTR_CHARLIKE
- , CONSTR_STATIC
- , CONSTR_NOCAF_STATIC
-
- , FUN
- , FUN_STATIC
-
- , THUNK
- /* THUNK_p_np */
- , 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 _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_STATIC (_HNF| _NS|_STA )
-#define FLAGS_CONSTR_NOCAF_STATIC (_HNF| _NS|_STA )
-#define FLAGS_FUN (_HNF| _NS| _SRT )
-#define FLAGS_FUN_STATIC (_HNF| _NS|_STA| _SRT )
-#define FLAGS_THUNK ( _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 )
+#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 _IND (1<<8) /* is an indirection? */
+
+#define isSTATIC(flags) ((flags) &_STA)
+#define isMUTABLE(flags) ((flags) &_MUT)
+#define isBITMAP(flags) ((flags) &_BTM)
+#define isTHUNK(flags) ((flags) &_THU)
+#define isUNPOINTED(flags) ((flags) &_UPT)
+#define hasSRT(flags) ((flags) &_SRT)
+
+extern StgWord16 closure_flags[];
+
+#define closureFlags(c) (closure_flags[get_itbl(c)->type])
+
+#define closure_HNF(c) ( closureFlags(c) & _HNF)
+#define closure_BITMAP(c) ( closureFlags(c) & _BTM)
+#define closure_NON_SPARK(c) ( (closureFlags(c) & _NS))
+#define closure_SHOULD_SPARK(c) (!(closureFlags(c) & _NS))
+#define closure_STATIC(c) ( closureFlags(c) & _STA)
+#define closure_THUNK(c) ( closureFlags(c) & _THU)
+#define closure_MUTABLE(c) ( closureFlags(c) & _MUT)
+#define closure_UNPOINTED(c) ( closureFlags(c) & _UPT)
+#define closure_SRT(c) ( closureFlags(c) & _SRT)
+#define closure_IND(c) ( closureFlags(c) & _IND)
+
+/* same as above but for info-ptr rather than closure */
+#define ipFlags(ip) (closure_flags[ip->type])
+
+#define ip_HNF(ip) ( ipFlags(ip) & _HNF)
+#define ip_BITMAP(ip) ( ipFlags(ip) & _BTM)
+#define ip_SHOULD_SPARK(ip) (!(ipFlags(ip) & _NS))
+#define ip_STATIC(ip) ( ipFlags(ip) & _STA)
+#define ip_THUNK(ip) ( ipFlags(ip) & _THU)
+#define ip_MUTABLE(ip) ( ipFlags(ip) & _MUT)
+#define ip_UNPOINTED(ip) ( ipFlags(ip) & _UPT)
+#define ip_SRT(ip) ( ipFlags(ip) & _SRT)
+#define ip_IND(ip) ( ipFlags(ip) & _IND)
/* -----------------------------------------------------------------------------
Info Tables
typedef struct {
StgWord size;
- StgWord bitmap[0];
+ StgWord bitmap[FLEXIBLE_ARRAY];
} StgLargeBitmap;
/*
*/
typedef union {
+ struct {
+#if SIZEOF_VOID_P == 8
+ StgWord32 ptrs; /* number of pointers */
+ StgWord32 nptrs; /* number of non-pointers */
+#else
+ StgWord16 ptrs; /* number of pointers */
+ StgWord16 nptrs; /* number of non-pointers */
+#endif
+ } payload;
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;
typedef StgClosure* StgSRT[];
+/*
+ * The entry code pointer must be the first word of an info table.
+ * See the comment in ghc/rts/Storage.h (Plan C) for details.
+ */
typedef struct _StgInfoTable {
+#ifndef TABLES_NEXT_TO_CODE
+ StgFunPtr entry;
+#endif
StgSRT *srt; /* pointer to the SRT table */
- StgParInfo par;
+#if defined(PAR) || defined(GRAN)
+ struct _StgInfoTable *rbh_infoptr;
+#endif
+#ifdef PROFILING
StgProfInfo prof;
+#endif
+#ifdef TICKY
+ StgTickyInfo ticky;
+#endif
+#ifdef DEBUG_CLOSURE
StgDebugInfo debug;
+#endif
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; /* } */
+ StgWord32 type; /* } These 2 elements fit into 64 bits */
+ StgWord32 srt_len; /* } */
#else
- StgNat8 flags; /* } */
- StgClosureType type : 8; /* } These 4 elements fit into 32 bits */
- StgNat16 srt_len; /* } */
+ StgWord type : 16; /* } These 2 elements fit into 32 bits */
+ StgWord srt_len : 16; /* } */
#endif
-#if USE_MINIINTERPRETER
- StgFunPtr (*vector)[];
- StgFunPtr entry;
+#ifdef TABLES_NEXT_TO_CODE
+ StgCode code[FLEXIBLE_ARRAY];
#else
- StgCode code[0];
+ StgFunPtr vector[FLEXIBLE_ARRAY];
#endif
} StgInfoTable;
+/* Info tables are read-only, therefore we uniformly declare them with
+ * C's const attribute. This isn't just a nice thing to do: it's
+ * necessary because the garbage collector has to distinguish between
+ * closure pointers and info table pointers when traversing the
+ * stack. We distinguish the two by checking whether the pointer is
+ * into text-space or not.
+ */
+
+#if ia64_TARGET_ARCH
+/* We need to give the compiler a gentle hint to put it in text-space */
+#define INFO_TBL_CONST const __attribute__((section (".text")))
+#else
+#define INFO_TBL_CONST const
+#endif
+
#endif /* INFOTABLES_H */
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