X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fincludes%2FClosureMacros.h;h=0690981adf8955edea39cb62933e0c7380d149b7;hb=f62fd70df7695286af55854911dad8a28eecb5e1;hp=b1ac095257d86b6ede52e9f3634cdc86a86e9548;hpb=b53f0596d8afc5d6f1dcc335e7aed5afdd0a5578;p=ghc-hetmet.git diff --git a/ghc/includes/ClosureMacros.h b/ghc/includes/ClosureMacros.h index b1ac095..0690981 100644 --- a/ghc/includes/ClosureMacros.h +++ b/ghc/includes/ClosureMacros.h @@ -1,5 +1,5 @@ /* ---------------------------------------------------------------------------- - * $Id: ClosureMacros.h,v 1.21 2000/03/17 14:37:21 simonmar Exp $ + * $Id: ClosureMacros.h,v 1.32 2001/02/06 11:41:04 rrt Exp $ * * (c) The GHC Team, 1998-1999 * @@ -10,14 +10,10 @@ #ifndef CLOSUREMACROS_H #define CLOSUREMACROS_H -/* ----------------------------------------------------------------------------- - Fixed Header Size - - The compiler tries to abstract away from the actual value of this - constant. - -------------------------------------------------------------------------- */ - -#define _FHS sizeof(StgHeader) +/* Say whether the code comes before the heap; on mingwin this may not be the + case, not because of another random MS pathology, but because the static + program may reside in a DLL +*/ /* ----------------------------------------------------------------------------- Info tables are slammed up against the entry code, and the label @@ -79,161 +75,6 @@ static __inline__ StgFunPtr get_entry(const StgInfoTable *itbl) { #endif /* ----------------------------------------------------------------------------- - Macros for distinguishing data pointers from code pointers - -------------------------------------------------------------------------- */ -/* - * We use some symbols inserted automatically by the linker to decide - * whether a pointer points to text, data, or user space. These tests - * assume that text is lower in the address space than data, which in - * turn is lower than user allocated memory. - * - * If this assumption is false (say on some strange architecture) then - * the tests IS_CODE_PTR and IS_DATA_PTR below will need to be - * modified (and that should be all that's necessary). - * - * _start } start of read-only text space - * _etext } end of read-only text space - * _end } end of read-write data space - */ -extern StgFun start; - -extern void* TEXT_SECTION_END_MARKER_DECL; -extern void* DATA_SECTION_END_MARKER_DECL; - -#ifdef INTERPRETER -/* Take into account code sections in dynamically loaded object files. */ -#define IS_CODE_PTR(p) ( ((P_)(p) < (P_)&TEXT_SECTION_END_MARKER) \ - || is_dynamically_loaded_code_or_rodata_ptr(p) ) -#define IS_DATA_PTR(p) ( ((P_)(p) >= (P_)&TEXT_SECTION_END_MARKER && \ - (P_)(p) < (P_)&DATA_SECTION_END_MARKER) \ - || is_dynamically_loaded_rwdata_ptr(p) ) -#define IS_USER_PTR(p) ( ((P_)(p) >= (P_)&DATA_SECTION_END_MARKER) \ - && is_not_dynamically_loaded_ptr(p) ) -#else -#define IS_CODE_PTR(p) ((P_)(p) < (P_)&TEXT_SECTION_END_MARKER) -#define IS_DATA_PTR(p) ((P_)(p) >= (P_)&TEXT_SECTION_END_MARKER && (P_)(p) < (P_)&DATA_SECTION_END_MARKER) -#define IS_USER_PTR(p) ((P_)(p) >= (P_)&DATA_SECTION_END_MARKER) -#endif - - - -#ifdef HAVE_WIN32_DLL_SUPPORT -extern int is_heap_alloced(const void* x); -# define HEAP_ALLOCED(x) (is_heap_alloced(x)) -#else -# define HEAP_ALLOCED(x) IS_USER_PTR(x) -#endif - -/* When working with Win32 DLLs, static closures are identified by - being prefixed with a zero word. This is needed so that we can - distinguish between pointers to static closures and (reversed!) - info tables. - - This 'scheme' breaks down for closure tables such as CHARLIKE, - so we catch these separately. - - LOOKS_LIKE_STATIC_CLOSURE() - - discriminates between static closures and info tbls - (needed by LOOKS_LIKE_GHC_INFO() below - [Win32 DLLs only.]) - LOOKS_LIKE_STATIC() - - distinguishes between static and heap allocated data. - */ -#ifdef HAVE_WIN32_DLL_SUPPORT -#define LOOKS_LIKE_STATIC(r) (!(HEAP_ALLOCED(r))) - -/* Tiresome predicates needed to check for pointers into the closure tables */ -#define IS_CHARLIKE_CLOSURE(p) ( (P_)(p) >= (P_)CHARLIKE_closure && (char*)(p) <= ((char*)CHARLIKE_closure + 255 * sizeof(StgIntCharlikeClosure)) ) -#define IS_INTLIKE_CLOSURE(p) ( (P_)(p) >= (P_)INTLIKE_closure && (char*)(p) <= ((char*)INTLIKE_closure + 32 * sizeof(StgIntCharlikeClosure)) ) - -#define LOOKS_LIKE_STATIC_CLOSURE(r) (((*(((unsigned long *)(r))-1)) == 0) || IS_CHARLIKE_CLOSURE(r) || IS_INTLIKE_CLOSURE(r)) -#else -#define LOOKS_LIKE_STATIC(r) IS_DATA_PTR(r) -#define LOOKS_LIKE_STATIC_CLOSURE(r) IS_DATA_PTR(r) -#endif - - -/* ----------------------------------------------------------------------------- - Macros for distinguishing infotables from closures. - - You'd think it'd be easy to tell an info pointer from a closure pointer: - closures live on the heap and infotables are in read only memory. Right? - Wrong! Static closures live in read only memory and Hugs allocates - infotables for constructors on the (writable) C heap. - - ToDo: in the combined Hugs-GHC system, the following are but crude - approximations. This absolutely has to be fixed. - -------------------------------------------------------------------------- */ - -#ifdef INTERPRETER -#ifdef USE_MINIINTERPRETER -/* yoiks: one of the dreaded pointer equality tests */ -#define IS_HUGS_CONSTR_INFO(info) (((StgInfoTable *)(info))->entry == (StgFunPtr)&Hugs_CONSTR_entry) -#else -#define IS_HUGS_CONSTR_INFO(info) 0 /* ToDo: more than mildly bogus */ -#endif -#else -#define IS_HUGS_CONSTR_INFO(info) 0 /* ToDo: more than mildly bogus */ -#endif - -#ifdef HAVE_WIN32_DLL_SUPPORT -# define LOOKS_LIKE_GHC_INFO(info) (!HEAP_ALLOCED(info) && !LOOKS_LIKE_STATIC_CLOSURE(info)) -#else -# define LOOKS_LIKE_GHC_INFO(info) IS_CODE_PTR(info) -#endif - -/* ----------------------------------------------------------------------------- - Macros for calculating how big a closure will be (used during allocation) - -------------------------------------------------------------------------- */ - -/* ToDo: replace unsigned int by nat. The only fly in the ointment is that - * nat comes from Rts.h which many folk dont include. Sigh! - */ -static __inline__ StgOffset AP_sizeW ( unsigned int n_args ) -{ return sizeofW(StgAP_UPD) + n_args; } - -static __inline__ StgOffset PAP_sizeW ( unsigned int n_args ) -{ return sizeofW(StgPAP) + n_args; } - -static __inline__ StgOffset CONSTR_sizeW( unsigned int p, unsigned int np ) -{ return sizeofW(StgHeader) + p + np; } - -static __inline__ StgOffset BCO_sizeW ( unsigned int p, unsigned int np, unsigned int is ) -{ return sizeofW(StgBCO) + p + np + (is+sizeof(StgWord)-1)/sizeof(StgWord); } - -static __inline__ StgOffset THUNK_SELECTOR_sizeW ( void ) -{ return sizeofW(StgHeader) + MIN_UPD_SIZE; } - -static __inline__ StgOffset BLACKHOLE_sizeW ( void ) -{ return sizeofW(StgHeader) + MIN_UPD_SIZE; } - -static __inline__ StgOffset CAF_sizeW ( void ) -{ return sizeofW(StgCAF); } - -/* -------------------------------------------------------------------------- - * Sizes of closures - * ------------------------------------------------------------------------*/ - -static __inline__ StgOffset sizeW_fromITBL( const StgInfoTable* itbl ) -{ return sizeofW(StgClosure) - + sizeofW(StgPtr) * itbl->layout.payload.ptrs - + sizeofW(StgWord) * itbl->layout.payload.nptrs; } - -static __inline__ StgOffset pap_sizeW( StgPAP* x ) -{ return PAP_sizeW(x->n_args); } - -static __inline__ StgOffset arr_words_sizeW( StgArrWords* x ) -{ return sizeofW(StgArrWords) + x->words; } - -static __inline__ StgOffset mut_arr_ptrs_sizeW( StgMutArrPtrs* x ) -{ return sizeofW(StgMutArrPtrs) + x->ptrs; } - -static __inline__ StgWord bco_sizeW( StgBCO* bco ) -{ return BCO_sizeW(bco->n_ptrs,bco->n_words,bco->n_instrs); } - -static __inline__ StgWord tso_sizeW ( StgTSO *tso ) -{ return TSO_STRUCT_SIZEW + tso->stack_size; } - -/* ----------------------------------------------------------------------------- Macros for building closures -------------------------------------------------------------------------- */ @@ -285,7 +126,7 @@ static __inline__ StgWord tso_sizeW ( StgTSO *tso ) Static closures are defined as follows: - SET_STATIC_HDR(PrelBase_CZh_closure,PrelBase_CZh_info,costCentreStack,const); + SET_STATIC_HDR(PrelBase_CZh_closure,PrelBase_CZh_info,costCentreStack,closure_class,info_class); The info argument must have type 'StgInfoTable' or 'StgSRTInfoTable', since we use '&' to get its address in the macro. @@ -330,8 +171,8 @@ static __inline__ StgWord tso_sizeW ( StgTSO *tso ) INTLIKE and CHARLIKE closures. -------------------------------------------------------------------------- */ -#define CHARLIKE_CLOSURE(n) ((P_)&CHARLIKE_closure[n]) -#define INTLIKE_CLOSURE(n) ((P_)&INTLIKE_closure[(n)-MIN_INTLIKE]) +#define CHARLIKE_CLOSURE(n) ((P_)&stg_CHARLIKE_closure[(n)-MIN_CHARLIKE]) +#define INTLIKE_CLOSURE(n) ((P_)&stg_INTLIKE_closure[(n)-MIN_INTLIKE]) /* ----------------------------------------------------------------------------- Closure Tables (for enumerated data types) @@ -346,22 +187,4 @@ static __inline__ StgWord tso_sizeW ( StgTSO *tso ) /* constructors don't have SRTs */ #define GET_TAG(info) (INFO_PTR_TO_STRUCT(info)->srt_len) -/* ----------------------------------------------------------------------------- - BCOs. - -------------------------------------------------------------------------- */ - -#define bcoConstPtr( bco, i ) (*stgCast(StgPtr*, ((bco)->payload+(i)))) -#define bcoConstCPtr( bco, i ) (*stgCast(StgClosurePtr*,((bco)->payload+(i)))) -#define bcoConstInfoPtr( bco, i )(*stgCast(StgInfoTable**,((bco)->payload+(bco)->n_ptrs+i))) -#define bcoConstInt( bco, i ) (*stgCast(StgInt*, ((bco)->payload+(bco)->n_ptrs+i))) -#define bcoConstInt64( bco, i ) (PK_Int64(stgCast(StgWord*,(bco)->payload+(bco)->n_ptrs+i))) -#define bcoConstWord( bco, i ) (*stgCast(StgWord*, ((bco)->payload+(bco)->n_ptrs+i))) -#define bcoConstAddr( bco, i ) (*stgCast(StgAddr*, ((bco)->payload+(bco)->n_ptrs+i))) -#define bcoConstChar( bco, i ) (*stgCast(StgChar*, ((bco)->payload+(bco)->n_ptrs+i))) -#define bcoConstFloat( bco, i ) (PK_FLT(stgCast(StgWord*,(bco)->payload+(bco)->n_ptrs+i))) -#define bcoConstDouble( bco, i ) (PK_DBL(stgCast(StgWord*,(bco)->payload+(bco)->n_ptrs+i))) -#define bcoInstr( bco, i ) (stgCast(StgWord8*, ((bco)->payload+(bco)->n_ptrs+(bco)->n_words))[i]) -static __inline__ StgInt bcoInstr16 ( StgBCO* bco, unsigned int i ) -{ StgInt x = (bcoInstr(bco,i) << 8) + bcoInstr(bco,i+1); return x; } - #endif /* CLOSUREMACROS_H */