| // Copyright 2009 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| #include <u.h> |
| #include <libc.h> |
| #include "go.h" |
| |
| /* |
| * runtime interface and reflection data structures |
| */ |
| |
| static NodeList* signatlist; |
| static Sym* dtypesym(Type*); |
| static Sym* weaktypesym(Type*); |
| |
| static int |
| sigcmp(Sig *a, Sig *b) |
| { |
| int i; |
| |
| i = strcmp(a->name, b->name); |
| if(i != 0) |
| return i; |
| if(a->pkg == b->pkg) |
| return 0; |
| if(a->pkg == nil) |
| return -1; |
| if(b->pkg == nil) |
| return +1; |
| return strcmp(a->pkg->path->s, b->pkg->path->s); |
| } |
| |
| static Sig* |
| lsort(Sig *l, int(*f)(Sig*, Sig*)) |
| { |
| Sig *l1, *l2, *le; |
| |
| if(l == 0 || l->link == 0) |
| return l; |
| |
| l1 = l; |
| l2 = l; |
| for(;;) { |
| l2 = l2->link; |
| if(l2 == 0) |
| break; |
| l2 = l2->link; |
| if(l2 == 0) |
| break; |
| l1 = l1->link; |
| } |
| |
| l2 = l1->link; |
| l1->link = 0; |
| l1 = lsort(l, f); |
| l2 = lsort(l2, f); |
| |
| /* set up lead element */ |
| if((*f)(l1, l2) < 0) { |
| l = l1; |
| l1 = l1->link; |
| } else { |
| l = l2; |
| l2 = l2->link; |
| } |
| le = l; |
| |
| for(;;) { |
| if(l1 == 0) { |
| while(l2) { |
| le->link = l2; |
| le = l2; |
| l2 = l2->link; |
| } |
| le->link = 0; |
| break; |
| } |
| if(l2 == 0) { |
| while(l1) { |
| le->link = l1; |
| le = l1; |
| l1 = l1->link; |
| } |
| break; |
| } |
| if((*f)(l1, l2) < 0) { |
| le->link = l1; |
| le = l1; |
| l1 = l1->link; |
| } else { |
| le->link = l2; |
| le = l2; |
| l2 = l2->link; |
| } |
| } |
| le->link = 0; |
| return l; |
| } |
| |
| /* |
| * f is method type, with receiver. |
| * return function type, receiver as first argument (or not). |
| */ |
| Type* |
| methodfunc(Type *f, Type *receiver) |
| { |
| NodeList *in, *out; |
| Node *d; |
| Type *t; |
| |
| in = nil; |
| if(receiver) { |
| d = nod(ODCLFIELD, N, N); |
| d->type = receiver; |
| in = list(in, d); |
| } |
| for(t=getinargx(f)->type; t; t=t->down) { |
| d = nod(ODCLFIELD, N, N); |
| d->type = t->type; |
| d->isddd = t->isddd; |
| in = list(in, d); |
| } |
| |
| out = nil; |
| for(t=getoutargx(f)->type; t; t=t->down) { |
| d = nod(ODCLFIELD, N, N); |
| d->type = t->type; |
| out = list(out, d); |
| } |
| |
| return functype(N, in, out); |
| } |
| |
| /* |
| * return methods of non-interface type t, sorted by name. |
| * generates stub functions as needed. |
| */ |
| static Sig* |
| methods(Type *t) |
| { |
| Type *f, *mt, *it, *this; |
| Sig *a, *b; |
| Sym *method; |
| |
| // named method type |
| mt = methtype(t); |
| if(mt == T) |
| return nil; |
| expandmeth(mt->sym, mt); |
| |
| // type stored in interface word |
| it = t; |
| if(it->width > widthptr) |
| it = ptrto(t); |
| |
| // make list of methods for t, |
| // generating code if necessary. |
| a = nil; |
| for(f=mt->xmethod; f; f=f->down) { |
| if(f->type->etype != TFUNC) |
| continue; |
| if(f->etype != TFIELD) |
| fatal("methods: not field"); |
| method = f->sym; |
| if(method == nil) |
| continue; |
| |
| // get receiver type for this particular method. |
| // if pointer receiver but non-pointer t and |
| // this is not an embedded pointer inside a struct, |
| // method does not apply. |
| this = getthisx(f->type)->type->type; |
| if(isptr[this->etype] && this->type == t) |
| continue; |
| if(isptr[this->etype] && !isptr[t->etype] |
| && f->embedded != 2 && !isifacemethod(f->type)) |
| continue; |
| |
| b = mal(sizeof(*b)); |
| b->link = a; |
| a = b; |
| |
| a->name = method->name; |
| if(!exportname(method->name)) { |
| if(method->pkg == nil) |
| fatal("methods: missing package"); |
| a->pkg = method->pkg; |
| } |
| a->isym = methodsym(method, it, 1); |
| a->tsym = methodsym(method, t, 0); |
| a->type = methodfunc(f->type, t); |
| a->mtype = methodfunc(f->type, nil); |
| |
| if(!(a->isym->flags & SymSiggen)) { |
| a->isym->flags |= SymSiggen; |
| if(!eqtype(this, it) || this->width < types[tptr]->width) { |
| // Is okay to call genwrapper here always, |
| // but we can generate more efficient code |
| // using genembedtramp if all that is necessary |
| // is a pointer adjustment and a JMP. |
| if(isptr[it->etype] && isptr[this->etype] |
| && f->embedded && !isifacemethod(f->type)) |
| genembedtramp(it, f, a->isym, 1); |
| else |
| genwrapper(it, f, a->isym, 1); |
| } |
| } |
| |
| if(!(a->tsym->flags & SymSiggen)) { |
| a->tsym->flags |= SymSiggen; |
| if(!eqtype(this, t)) { |
| if(isptr[t->etype] && isptr[this->etype] |
| && f->embedded && !isifacemethod(f->type)) |
| genembedtramp(t, f, a->tsym, 0); |
| else |
| genwrapper(t, f, a->tsym, 0); |
| } |
| } |
| } |
| |
| return lsort(a, sigcmp); |
| } |
| |
| /* |
| * return methods of interface type t, sorted by name. |
| */ |
| static Sig* |
| imethods(Type *t) |
| { |
| Sig *a, *all, *last; |
| Type *f; |
| Sym *method, *isym; |
| |
| all = nil; |
| last = nil; |
| for(f=t->type; f; f=f->down) { |
| if(f->etype != TFIELD) |
| fatal("imethods: not field"); |
| if(f->type->etype != TFUNC || f->sym == nil) |
| continue; |
| method = f->sym; |
| a = mal(sizeof(*a)); |
| a->name = method->name; |
| if(!exportname(method->name)) { |
| if(method->pkg == nil) |
| fatal("imethods: missing package"); |
| a->pkg = method->pkg; |
| } |
| a->mtype = f->type; |
| a->offset = 0; |
| a->type = methodfunc(f->type, nil); |
| |
| if(last && sigcmp(last, a) >= 0) |
| fatal("sigcmp vs sortinter %s %s", last->name, a->name); |
| if(last == nil) |
| all = a; |
| else |
| last->link = a; |
| last = a; |
| |
| // Compiler can only refer to wrappers for |
| // named interface types. |
| if(t->sym == S) |
| continue; |
| |
| // NOTE(rsc): Perhaps an oversight that |
| // IfaceType.Method is not in the reflect data. |
| // Generate the method body, so that compiled |
| // code can refer to it. |
| isym = methodsym(method, t, 0); |
| if(!(isym->flags & SymSiggen)) { |
| isym->flags |= SymSiggen; |
| genwrapper(t, f, isym, 0); |
| } |
| } |
| return all; |
| } |
| |
| static void |
| dimportpath(Pkg *p) |
| { |
| static Pkg *gopkg; |
| char *nam; |
| Node *n; |
| |
| if(p->pathsym != S) |
| return; |
| |
| if(gopkg == nil) { |
| gopkg = mkpkg(strlit("go")); |
| gopkg->name = "go"; |
| } |
| nam = smprint("importpath.%s.", p->prefix); |
| |
| n = nod(ONAME, N, N); |
| n->sym = pkglookup(nam, gopkg); |
| free(nam); |
| n->class = PEXTERN; |
| n->xoffset = 0; |
| p->pathsym = n->sym; |
| |
| gdatastring(n, p->path); |
| ggloblsym(n->sym, types[TSTRING]->width, 1); |
| } |
| |
| static int |
| dgopkgpath(Sym *s, int ot, Pkg *pkg) |
| { |
| if(pkg == nil) |
| return dgostringptr(s, ot, nil); |
| |
| // Emit reference to go.importpath.""., which 6l will |
| // rewrite using the correct import path. Every package |
| // that imports this one directly defines the symbol. |
| if(pkg == localpkg) { |
| static Sym *ns; |
| |
| if(ns == nil) |
| ns = pkglookup("importpath.\"\".", mkpkg(strlit("go"))); |
| return dsymptr(s, ot, ns, 0); |
| } |
| |
| dimportpath(pkg); |
| return dsymptr(s, ot, pkg->pathsym, 0); |
| } |
| |
| /* |
| * uncommonType |
| * ../../pkg/runtime/type.go:/uncommonType |
| */ |
| static int |
| dextratype(Sym *sym, int off, Type *t, int ptroff) |
| { |
| int ot, n; |
| Sym *s; |
| Sig *a, *m; |
| |
| m = methods(t); |
| if(t->sym == nil && m == nil) |
| return off; |
| |
| // fill in *extraType pointer in header |
| dsymptr(sym, ptroff, sym, off); |
| |
| n = 0; |
| for(a=m; a; a=a->link) { |
| dtypesym(a->type); |
| n++; |
| } |
| |
| ot = off; |
| s = sym; |
| if(t->sym) { |
| ot = dgostringptr(s, ot, t->sym->name); |
| if(t != types[t->etype]) |
| ot = dgopkgpath(s, ot, t->sym->pkg); |
| else |
| ot = dgostringptr(s, ot, nil); |
| } else { |
| ot = dgostringptr(s, ot, nil); |
| ot = dgostringptr(s, ot, nil); |
| } |
| |
| // slice header |
| ot = dsymptr(s, ot, s, ot + widthptr + 2*4); |
| ot = duint32(s, ot, n); |
| ot = duint32(s, ot, n); |
| |
| // methods |
| for(a=m; a; a=a->link) { |
| // method |
| // ../../pkg/runtime/type.go:/method |
| ot = dgostringptr(s, ot, a->name); |
| ot = dgopkgpath(s, ot, a->pkg); |
| ot = dsymptr(s, ot, dtypesym(a->mtype), 0); |
| ot = dsymptr(s, ot, dtypesym(a->type), 0); |
| if(a->isym) |
| ot = dsymptr(s, ot, a->isym, 0); |
| else |
| ot = duintptr(s, ot, 0); |
| if(a->tsym) |
| ot = dsymptr(s, ot, a->tsym, 0); |
| else |
| ot = duintptr(s, ot, 0); |
| } |
| |
| return ot; |
| } |
| |
| enum { |
| KindBool = 1, |
| KindInt, |
| KindInt8, |
| KindInt16, |
| KindInt32, |
| KindInt64, |
| KindUint, |
| KindUint8, |
| KindUint16, |
| KindUint32, |
| KindUint64, |
| KindUintptr, |
| KindFloat32, |
| KindFloat64, |
| KindComplex64, |
| KindComplex128, |
| KindArray, |
| KindChan, |
| KindFunc, |
| KindInterface, |
| KindMap, |
| KindPtr, |
| KindSlice, |
| KindString, |
| KindStruct, |
| KindUnsafePointer, |
| |
| KindNoPointers = 1<<7, |
| }; |
| |
| static int |
| kinds[] = |
| { |
| [TINT] = KindInt, |
| [TUINT] = KindUint, |
| [TINT8] = KindInt8, |
| [TUINT8] = KindUint8, |
| [TINT16] = KindInt16, |
| [TUINT16] = KindUint16, |
| [TINT32] = KindInt32, |
| [TUINT32] = KindUint32, |
| [TINT64] = KindInt64, |
| [TUINT64] = KindUint64, |
| [TUINTPTR] = KindUintptr, |
| [TFLOAT32] = KindFloat32, |
| [TFLOAT64] = KindFloat64, |
| [TBOOL] = KindBool, |
| [TSTRING] = KindString, |
| [TPTR32] = KindPtr, |
| [TPTR64] = KindPtr, |
| [TSTRUCT] = KindStruct, |
| [TINTER] = KindInterface, |
| [TCHAN] = KindChan, |
| [TMAP] = KindMap, |
| [TARRAY] = KindArray, |
| [TFUNC] = KindFunc, |
| [TCOMPLEX64] = KindComplex64, |
| [TCOMPLEX128] = KindComplex128, |
| [TUNSAFEPTR] = KindUnsafePointer, |
| }; |
| |
| static char* |
| structnames[] = |
| { |
| [TINT] = "*runtime.IntType", |
| [TUINT] = "*runtime.UintType", |
| [TINT8] = "*runtime.IntType", |
| [TUINT8] = "*runtime.UintType", |
| [TINT16] = "*runtime.IntType", |
| [TUINT16] = "*runtime.UintType", |
| [TINT32] = "*runtime.IntType", |
| [TUINT32] = "*runtime.UintType", |
| [TINT64] = "*runtime.IntType", |
| [TUINT64] = "*runtime.UintType", |
| [TUINTPTR] = "*runtime.UintType", |
| [TCOMPLEX64] = "*runtime.ComplexType", |
| [TCOMPLEX128] = "*runtime.ComplexType", |
| [TFLOAT32] = "*runtime.FloatType", |
| [TFLOAT64] = "*runtime.FloatType", |
| [TBOOL] = "*runtime.BoolType", |
| [TSTRING] = "*runtime.StringType", |
| [TUNSAFEPTR] = "*runtime.UnsafePointerType", |
| |
| [TPTR32] = "*runtime.PtrType", |
| [TPTR64] = "*runtime.PtrType", |
| [TSTRUCT] = "*runtime.StructType", |
| [TINTER] = "*runtime.InterfaceType", |
| [TCHAN] = "*runtime.ChanType", |
| [TMAP] = "*runtime.MapType", |
| [TARRAY] = "*runtime.ArrayType", |
| [TFUNC] = "*runtime.FuncType", |
| }; |
| |
| static Sym* |
| typestruct(Type *t) |
| { |
| char *name; |
| int et; |
| |
| et = t->etype; |
| if(et < 0 || et >= nelem(structnames) || (name = structnames[et]) == nil) { |
| fatal("typestruct %lT", t); |
| return nil; // silence gcc |
| } |
| |
| if(isslice(t)) |
| name = "*runtime.SliceType"; |
| |
| return pkglookup(name, typepkg); |
| } |
| |
| int |
| haspointers(Type *t) |
| { |
| Type *t1; |
| |
| switch(t->etype) { |
| case TINT: |
| case TUINT: |
| case TINT8: |
| case TUINT8: |
| case TINT16: |
| case TUINT16: |
| case TINT32: |
| case TUINT32: |
| case TINT64: |
| case TUINT64: |
| case TUINTPTR: |
| case TFLOAT32: |
| case TFLOAT64: |
| case TBOOL: |
| return 0; |
| case TARRAY: |
| if(t->bound < 0) // slice |
| return 1; |
| return haspointers(t->type); |
| case TSTRUCT: |
| for(t1=t->type; t1!=T; t1=t1->down) |
| if(haspointers(t1->type)) |
| return 1; |
| return 0; |
| case TSTRING: |
| case TPTR32: |
| case TPTR64: |
| case TUNSAFEPTR: |
| case TINTER: |
| case TCHAN: |
| case TMAP: |
| case TFUNC: |
| default: |
| return 1; |
| } |
| } |
| |
| /* |
| * commonType |
| * ../../pkg/runtime/type.go:/commonType |
| */ |
| static int |
| dcommontype(Sym *s, int ot, Type *t) |
| { |
| int i; |
| Sym *sptr; |
| char *p; |
| |
| dowidth(t); |
| |
| if(t->sym != nil && !isptr[t->etype]) |
| sptr = dtypesym(ptrto(t)); |
| else |
| sptr = weaktypesym(ptrto(t)); |
| |
| // empty interface pointing at this type. |
| // all the references that we emit are *interface{}; |
| // they point here. |
| ot = rnd(ot, widthptr); |
| ot = dsymptr(s, ot, typestruct(t), 0); |
| ot = dsymptr(s, ot, s, 2*widthptr); |
| |
| // ../../pkg/runtime/type.go:/commonType |
| // actual type structure |
| // type commonType struct { |
| // size uintptr; |
| // hash uint32; |
| // alg uint8; |
| // align uint8; |
| // fieldAlign uint8; |
| // kind uint8; |
| // string *string; |
| // *extraType; |
| // ptrToThis *Type |
| // } |
| ot = duintptr(s, ot, t->width); |
| ot = duint32(s, ot, typehash(t)); |
| ot = duint8(s, ot, algtype(t)); |
| ot = duint8(s, ot, t->align); // align |
| ot = duint8(s, ot, t->align); // fieldAlign |
| i = kinds[t->etype]; |
| if(t->etype == TARRAY && t->bound < 0) |
| i = KindSlice; |
| if(!haspointers(t)) |
| i |= KindNoPointers; |
| ot = duint8(s, ot, i); // kind |
| longsymnames = 1; |
| p = smprint("%-T", t); |
| longsymnames = 0; |
| ot = dgostringptr(s, ot, p); // string |
| free(p); |
| |
| // skip pointer to extraType, |
| // which follows the rest of this type structure. |
| // caller will fill in if needed. |
| // otherwise linker will assume 0. |
| ot += widthptr; |
| |
| ot = dsymptr(s, ot, sptr, 0); // ptrto type |
| return ot; |
| } |
| |
| Sym* |
| typesym(Type *t) |
| { |
| char *p; |
| Sym *s; |
| |
| p = smprint("%#-T", t); |
| s = pkglookup(p, typepkg); |
| free(p); |
| return s; |
| } |
| |
| Node* |
| typename(Type *t) |
| { |
| Sym *s; |
| Node *n; |
| |
| if(t == T || (isptr[t->etype] && t->type == T) || isideal(t)) |
| fatal("typename %T", t); |
| s = typesym(t); |
| if(s->def == N) { |
| n = nod(ONAME, N, N); |
| n->sym = s; |
| n->type = types[TUINT8]; |
| n->addable = 1; |
| n->ullman = 1; |
| n->class = PEXTERN; |
| n->xoffset = 0; |
| s->def = n; |
| |
| signatlist = list(signatlist, typenod(t)); |
| } |
| |
| n = nod(OADDR, s->def, N); |
| n->type = ptrto(s->def->type); |
| n->addable = 1; |
| n->ullman = 2; |
| return n; |
| } |
| |
| static Sym* |
| weaktypesym(Type *t) |
| { |
| char *p; |
| Sym *s; |
| static Pkg *weak; |
| |
| if(weak == nil) { |
| weak = mkpkg(strlit("weak.type")); |
| weak->name = "weak.type"; |
| weak->prefix = "weak.type"; // not weak%2etype |
| } |
| |
| p = smprint("%#-T", t); |
| s = pkglookup(p, weak); |
| free(p); |
| return s; |
| } |
| |
| static Sym* |
| dtypesym(Type *t) |
| { |
| int ot, xt, n, isddd, dupok; |
| Sym *s, *s1, *s2; |
| Sig *a, *m; |
| Type *t1, *tbase, *t2; |
| |
| if(isideal(t)) |
| fatal("dtypesym %T", t); |
| |
| s = typesym(t); |
| if(s->flags & SymSiggen) |
| return s; |
| s->flags |= SymSiggen; |
| |
| // special case (look for runtime below): |
| // when compiling package runtime, |
| // emit the type structures for int, float, etc. |
| tbase = t; |
| if(isptr[t->etype] && t->sym == S && t->type->sym != S) |
| tbase = t->type; |
| dupok = tbase->sym == S; |
| |
| if(compiling_runtime && (tbase == types[tbase->etype] || tbase == bytetype)) // int, float, etc |
| goto ok; |
| |
| // named types from other files are defined only by those files |
| if(tbase->sym && !tbase->local) |
| return s; |
| if(isforw[tbase->etype]) |
| return s; |
| |
| ok: |
| ot = 0; |
| xt = 0; |
| switch(t->etype) { |
| default: |
| ot = dcommontype(s, ot, t); |
| xt = ot - 2*widthptr; |
| break; |
| |
| case TARRAY: |
| if(t->bound >= 0) { |
| // ../../pkg/runtime/type.go:/ArrayType |
| s1 = dtypesym(t->type); |
| t2 = typ(TARRAY); |
| t2->type = t->type; |
| t2->bound = -1; // slice |
| s2 = dtypesym(t2); |
| ot = dcommontype(s, ot, t); |
| xt = ot - 2*widthptr; |
| ot = dsymptr(s, ot, s1, 0); |
| ot = dsymptr(s, ot, s2, 0); |
| ot = duintptr(s, ot, t->bound); |
| } else { |
| // ../../pkg/runtime/type.go:/SliceType |
| s1 = dtypesym(t->type); |
| ot = dcommontype(s, ot, t); |
| xt = ot - 2*widthptr; |
| ot = dsymptr(s, ot, s1, 0); |
| } |
| break; |
| |
| case TCHAN: |
| // ../../pkg/runtime/type.go:/ChanType |
| s1 = dtypesym(t->type); |
| ot = dcommontype(s, ot, t); |
| xt = ot - 2*widthptr; |
| ot = dsymptr(s, ot, s1, 0); |
| ot = duintptr(s, ot, t->chan); |
| break; |
| |
| case TFUNC: |
| for(t1=getthisx(t)->type; t1; t1=t1->down) |
| dtypesym(t1->type); |
| isddd = 0; |
| for(t1=getinargx(t)->type; t1; t1=t1->down) { |
| isddd = t1->isddd; |
| dtypesym(t1->type); |
| } |
| for(t1=getoutargx(t)->type; t1; t1=t1->down) |
| dtypesym(t1->type); |
| |
| ot = dcommontype(s, ot, t); |
| xt = ot - 2*widthptr; |
| ot = duint8(s, ot, isddd); |
| |
| // two slice headers: in and out. |
| ot = rnd(ot, widthptr); |
| ot = dsymptr(s, ot, s, ot+2*(widthptr+2*4)); |
| n = t->thistuple + t->intuple; |
| ot = duint32(s, ot, n); |
| ot = duint32(s, ot, n); |
| ot = dsymptr(s, ot, s, ot+1*(widthptr+2*4)+n*widthptr); |
| ot = duint32(s, ot, t->outtuple); |
| ot = duint32(s, ot, t->outtuple); |
| |
| // slice data |
| for(t1=getthisx(t)->type; t1; t1=t1->down, n++) |
| ot = dsymptr(s, ot, dtypesym(t1->type), 0); |
| for(t1=getinargx(t)->type; t1; t1=t1->down, n++) |
| ot = dsymptr(s, ot, dtypesym(t1->type), 0); |
| for(t1=getoutargx(t)->type; t1; t1=t1->down, n++) |
| ot = dsymptr(s, ot, dtypesym(t1->type), 0); |
| break; |
| |
| case TINTER: |
| m = imethods(t); |
| n = 0; |
| for(a=m; a; a=a->link) { |
| dtypesym(a->type); |
| n++; |
| } |
| |
| // ../../pkg/runtime/type.go:/InterfaceType |
| ot = dcommontype(s, ot, t); |
| xt = ot - 2*widthptr; |
| ot = dsymptr(s, ot, s, ot+widthptr+2*4); |
| ot = duint32(s, ot, n); |
| ot = duint32(s, ot, n); |
| for(a=m; a; a=a->link) { |
| // ../../pkg/runtime/type.go:/imethod |
| ot = dgostringptr(s, ot, a->name); |
| ot = dgopkgpath(s, ot, a->pkg); |
| ot = dsymptr(s, ot, dtypesym(a->type), 0); |
| } |
| break; |
| |
| case TMAP: |
| // ../../pkg/runtime/type.go:/MapType |
| s1 = dtypesym(t->down); |
| s2 = dtypesym(t->type); |
| ot = dcommontype(s, ot, t); |
| xt = ot - 2*widthptr; |
| ot = dsymptr(s, ot, s1, 0); |
| ot = dsymptr(s, ot, s2, 0); |
| break; |
| |
| case TPTR32: |
| case TPTR64: |
| if(t->type->etype == TANY) { |
| // ../../pkg/runtime/type.go:/UnsafePointerType |
| ot = dcommontype(s, ot, t); |
| break; |
| } |
| // ../../pkg/runtime/type.go:/PtrType |
| s1 = dtypesym(t->type); |
| ot = dcommontype(s, ot, t); |
| xt = ot - 2*widthptr; |
| ot = dsymptr(s, ot, s1, 0); |
| break; |
| |
| case TSTRUCT: |
| // ../../pkg/runtime/type.go:/StructType |
| // for security, only the exported fields. |
| n = 0; |
| for(t1=t->type; t1!=T; t1=t1->down) { |
| dtypesym(t1->type); |
| n++; |
| } |
| ot = dcommontype(s, ot, t); |
| xt = ot - 2*widthptr; |
| ot = dsymptr(s, ot, s, ot+widthptr+2*4); |
| ot = duint32(s, ot, n); |
| ot = duint32(s, ot, n); |
| for(t1=t->type; t1!=T; t1=t1->down) { |
| // ../../pkg/runtime/type.go:/structField |
| if(t1->sym && !t1->embedded) { |
| ot = dgostringptr(s, ot, t1->sym->name); |
| if(exportname(t1->sym->name)) |
| ot = dgostringptr(s, ot, nil); |
| else |
| ot = dgopkgpath(s, ot, t1->sym->pkg); |
| } else { |
| ot = dgostringptr(s, ot, nil); |
| ot = dgostringptr(s, ot, nil); |
| } |
| ot = dsymptr(s, ot, dtypesym(t1->type), 0); |
| ot = dgostrlitptr(s, ot, t1->note); |
| ot = duintptr(s, ot, t1->width); // field offset |
| } |
| break; |
| } |
| ot = dextratype(s, ot, t, xt); |
| ggloblsym(s, ot, dupok); |
| return s; |
| } |
| |
| void |
| dumptypestructs(void) |
| { |
| int i; |
| NodeList *l; |
| Node *n; |
| Type *t; |
| Pkg *p; |
| |
| // copy types from externdcl list to signatlist |
| for(l=externdcl; l; l=l->next) { |
| n = l->n; |
| if(n->op != OTYPE) |
| continue; |
| signatlist = list(signatlist, n); |
| } |
| |
| // process signatlist |
| for(l=signatlist; l; l=l->next) { |
| n = l->n; |
| if(n->op != OTYPE) |
| continue; |
| t = n->type; |
| dtypesym(t); |
| if(t->sym) |
| dtypesym(ptrto(t)); |
| } |
| |
| // generate import strings for imported packages |
| for(i=0; i<nelem(phash); i++) |
| for(p=phash[i]; p; p=p->link) |
| if(p->direct) |
| dimportpath(p); |
| |
| // do basic types if compiling package runtime. |
| // they have to be in at least one package, |
| // and runtime is always loaded implicitly, |
| // so this is as good as any. |
| // another possible choice would be package main, |
| // but using runtime means fewer copies in .6 files. |
| if(compiling_runtime) { |
| for(i=1; i<=TBOOL; i++) |
| dtypesym(ptrto(types[i])); |
| dtypesym(ptrto(types[TSTRING])); |
| dtypesym(ptrto(types[TUNSAFEPTR])); |
| |
| // add paths for runtime and main, which 6l imports implicitly. |
| dimportpath(runtimepkg); |
| dimportpath(mkpkg(strlit("main"))); |
| } |
| } |