1 /* ----------------------------------------------------------------------------
2 * $Id: InfoTables.h,v 1.6 1999/01/26 11:12:55 simonm Exp $
6 * -------------------------------------------------------------------------- */
11 /* -----------------------------------------------------------------------------
13 -------------------------------------------------------------------------- */
17 #define PROF_INFO_WORDS n
23 #else /* !PROFILING */
25 #define PROF_INFO_WORDS 0
31 #endif /* PROFILING */
33 /* -----------------------------------------------------------------------------
35 -------------------------------------------------------------------------- */
39 #define PAR_INFO_WORDS 0
47 #define PAR_INFO_WORDS 0
55 /* -----------------------------------------------------------------------------
57 -------------------------------------------------------------------------- */
61 #define DEBUG_INFO_WORDS n
67 #else /* !DEBUG_CLOSURE */
69 #define DEBUG_INFO_WORDS 0
75 #endif /* DEBUG_CLOSURE */
77 /* -----------------------------------------------------------------------------
80 If you add or delete any closure types, don't forget to update
81 ClosureTypes.h for the native code generator. This is a temporary
83 -------------------------------------------------------------------------- */
87 INVALID_OBJECT /* Object tag 0 raises an internal error */
106 , PAP /* should be called AP_NUPD */
138 , MUT_ARR_PTRS_FROZEN
153 , N_CLOSURE_TYPES /* number of distinct closure types */
157 /* The type flags provide quick access to certain properties of a closure. */
159 #define _HNF (1<<0) /* head normal form? */
160 #define _BTM (1<<1) /* bitmap-style layout? */
161 #define _NS (1<<2) /* non-sparkable */
162 #define _STA (1<<3) /* static? */
163 #define _THU (1<<4) /* thunk? */
164 #define _MUT (1<<5) /* mutable? */
165 #define _UPT (1<<6) /* unpointed? */
166 #define _SRT (1<<7) /* has an SRT? */
168 #define isSTATIC(flags) ((flags)&_STA)
169 #define isMUTABLE(flags) ((flags) &_MUT)
171 #define closure_STATIC(closure) ( get_itbl(closure)->flags & _STA)
172 #define closure_SHOULD_SPARK(closure) (!(get_itbl(closure)->flags & _NS))
173 #define closure_MUTABLE(closure) ( get_itbl(closure)->flags & _MUT)
174 #define closure_UNPOINTED(closure) ( get_itbl(closure)->flags & _UPT)
176 /* HNF BTM NS STA THU MUT UPT SRT */
178 #define FLAGS_CONSTR (_HNF| _NS )
179 #define FLAGS_CONSTR_STATIC (_HNF| _NS|_STA )
180 #define FLAGS_CONSTR_NOCAF_STATIC (_HNF| _NS|_STA )
181 #define FLAGS_FUN (_HNF| _NS| _SRT )
182 #define FLAGS_FUN_STATIC (_HNF| _NS|_STA| _SRT )
183 #define FLAGS_THUNK ( _BTM| _THU| _SRT )
184 #define FLAGS_THUNK_STATIC ( _BTM| _STA|_THU| _SRT )
185 #define FLAGS_THUNK_SELECTOR ( _BTM| _THU| _SRT )
186 #define FLAGS_BCO (_HNF| _NS )
187 #define FLAGS_CAF_UNENTERED 0 /* Do we still use these? */
188 #define FLAGS_CAF_ENTERED 0
189 #define FLAGS_CAF_BLACKHOLE ( _BTM|_NS| _UPT )
190 #define FLAGS_AP_UPD ( _BTM| _THU )
191 #define FLAGS_PAP (_HNF| _NS )
193 #define FLAGS_IND_OLDGEN 0
194 #define FLAGS_IND_PERM 0
195 #define FLAGS_IND_OLDGEN_PERM 0
196 #define FLAGS_IND_STATIC ( _STA )
197 #define FLAGS_EVACUATED 0
198 #define FLAGS_ARR_WORDS (_HNF| _NS| _UPT )
199 #define FLAGS_MUT_ARR_WORDS (_HNF| _NS| _MUT|_UPT )
200 #define FLAGS_MUT_ARR_PTRS (_HNF| _NS| _MUT|_UPT )
201 #define FLAGS_MUT_ARR_PTRS_FROZEN (_HNF| _NS| _MUT|_UPT )
202 #define FLAGS_MUT_VAR (_HNF| _NS| _MUT|_UPT )
203 #define FLAGS_FOREIGN (_HNF| _NS| _UPT )
204 #define FLAGS_STABLE_NAME (_HNF| _NS| _UPT )
205 #define FLAGS_WEAK (_HNF| _NS| _UPT )
206 #define FLAGS_BLACKHOLE ( _NS| _UPT )
207 #define FLAGS_BLACKHOLE_BQ ( _NS| _MUT|_UPT )
208 #define FLAGS_MVAR (_HNF| _NS| _MUT|_UPT )
209 #define FLAGS_FETCH_ME (_HNF| _NS )
210 #define FLAGS_TSO (_HNF| _NS| _MUT|_UPT )
211 #define FLAGS_RET_BCO ( _BTM )
212 #define FLAGS_RET_SMALL ( _BTM| _SRT)
213 #define FLAGS_RET_VEC_SMALL ( _BTM| _SRT)
214 #define FLAGS_RET_BIG ( _SRT)
215 #define FLAGS_RET_VEC_BIG ( _SRT)
216 #define FLAGS_RET_DYN ( _SRT)
217 #define FLAGS_CATCH_FRAME ( _BTM )
218 #define FLAGS_STOP_FRAME ( _BTM )
219 #define FLAGS_SEQ_FRAME ( _BTM )
220 #define FLAGS_UPDATE_FRAME ( _BTM )
222 /* -----------------------------------------------------------------------------
224 -------------------------------------------------------------------------- */
226 /* A large bitmap. Small 32-bit ones live in the info table, but sometimes
227 * 32 bits isn't enough and we have to generate a larger one. (sizes
228 * differ for 64-bit machines.
237 * Stuff describing the closure layout. Well, actually, it might
238 * contain the selector index for a THUNK_SELECTOR. If we're on a
239 * 64-bit architecture then we can enlarge some of these fields, since
240 * the union contains a pointer field.
245 StgWord bitmap; /* bit pattern, 1 = pointer, 0 = non-pointer */
246 StgWord selector_offset; /* used in THUNK_SELECTORs */
247 StgLargeBitmap* large_bitmap; /* pointer to large bitmap structure */
249 #if SIZEOF_VOID_P == 8
251 StgNat32 ptrs; /* number of pointers */
252 StgNat32 nptrs; /* number of non-pointers */
256 StgNat16 ptrs; /* number of pointers */
257 StgNat16 nptrs; /* number of non-pointers */
264 * Info tables. All info tables are the same type, to simplify code
265 * generation. However, the mangler removes any unused SRT fields
266 * from the asm to save space (convention: if srt_len is zero, or the
267 * type is a CONSTR_ type, then the SRT field isn't present.
270 typedef StgClosure* StgSRT[];
272 typedef struct _StgInfoTable {
273 StgSRT *srt; /* pointer to the SRT table */
277 StgClosureInfo layout; /* closure layout info (pointer-sized) */
278 #if SIZEOF_VOID_P == 8
279 StgNat16 flags; /* } */
280 StgClosureType type : 16; /* } These 4 elements fit into 64 bits */
281 StgNat32 srt_len; /* } */
283 StgNat8 flags; /* } */
284 StgClosureType type : 8; /* } These 4 elements fit into 32 bits */
285 StgNat16 srt_len; /* } */
287 #if USE_MINIINTERPRETER
288 StgFunPtr (*vector)[];
295 #endif /* INFOTABLES_H */