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mirror of https://github.com/golang/go synced 2024-11-20 04:54:44 -07:00

6g, 8g: generate data structures for new reflect interface (CL 31107)

R=ken
OCL=31122
CL=31278
This commit is contained in:
Russ Cox 2009-07-07 11:03:04 -07:00
parent c7513eac88
commit 541e638f9b
11 changed files with 808 additions and 506 deletions

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@ -488,6 +488,46 @@ dstringptr(Sym *s, int off, char *str)
return off;
}
int
dgostrlitptr(Sym *s, int off, Strlit *lit)
{
Prog *p;
if(lit == nil)
return duintptr(s, off, 0);
off = rnd(off, widthptr);
p = gins(ADATA, N, N);
p->from.type = D_EXTERN;
p->from.index = D_NONE;
p->from.sym = s;
p->from.offset = off;
p->from.scale = widthptr;
datagostring(lit, &p->to);
p->to.index = p->to.type;
p->to.type = D_ADDR;
p->to.etype = TINT32;
off += widthptr;
return off;
}
int
dgostringptr(Sym *s, int off, char *str)
{
int n;
Strlit *lit;
if(str == nil)
return duintptr(s, off, 0);
n = strlen(str);
lit = mal(sizeof *lit + n);
strcpy(lit->s, str);
lit->len = n;
return dgostrlitptr(s, off, lit);
}
int
duintxx(Sym *s, int off, uint64 v, int wid)
{

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@ -486,6 +486,47 @@ dstringptr(Sym *s, int off, char *str)
return off;
}
int
dgostrlitptr(Sym *s, int off, Strlit *lit)
{
Prog *p;
if(lit == nil)
return duintptr(s, off, 0);
off = rnd(off, widthptr);
p = gins(ADATA, N, N);
p->from.type = D_EXTERN;
p->from.index = D_NONE;
p->from.sym = s;
p->from.offset = off;
p->from.scale = widthptr;
datagostring(lit, &p->to);
p->to.index = p->to.type;
p->to.type = D_ADDR;
p->to.etype = TINT32;
off += widthptr;
return off;
}
int
dgostringptr(Sym *s, int off, char *str)
{
int n;
Strlit *lit;
if(str == nil)
return duintptr(s, off, 0);
n = strlen(str);
lit = mal(sizeof *lit + n);
strcpy(lit->s, str);
lit->len = n;
return dgostrlitptr(s, off, lit);
}
int
duintxx(Sym *s, int off, uint64 v, int wid)
{

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@ -15,6 +15,7 @@ YFILES=\
go.y\
OFILES=\
reflect.$O\
y.tab.$O\
lex.$O\
subr.$O\

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@ -243,6 +243,10 @@ typeinit(void)
isptr[TPTR32] = 1;
isptr[TPTR64] = 1;
isforw[TFORW] = 1;
isforw[TFORWSTRUCT] = 1;
isforw[TFORWINTER] = 1;
issigned[TINT] = 1;
issigned[TINT8] = 1;
issigned[TINT16] = 1;

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@ -26,17 +26,17 @@ char *sysimport =
"func sys.stringiter (? string, ? int) (? int)\n"
"func sys.stringiter2 (? string, ? int) (retk int, retv int)\n"
"func sys.ifaceI2E (iface any) (ret any)\n"
"func sys.ifaceE2I (sigi *uint8, iface any) (ret any)\n"
"func sys.ifaceT2E (sigt *uint8, elem any) (ret any)\n"
"func sys.ifaceE2T (sigt *uint8, elem any) (ret any)\n"
"func sys.ifaceE2I2 (sigi *uint8, iface any) (ret any, ok bool)\n"
"func sys.ifaceE2T2 (sigt *uint8, elem any) (ret any, ok bool)\n"
"func sys.ifaceT2I (sigi *uint8, sigt *uint8, elem any) (ret any)\n"
"func sys.ifaceI2T (sigt *uint8, iface any) (ret any)\n"
"func sys.ifaceI2T2 (sigt *uint8, iface any) (ret any, ok bool)\n"
"func sys.ifaceI2I (sigi *uint8, iface any) (ret any)\n"
"func sys.ifaceI2Ix (sigi *uint8, iface any) (ret any)\n"
"func sys.ifaceI2I2 (sigi *uint8, iface any) (ret any, ok bool)\n"
"func sys.ifaceE2I (typ *uint8, iface any) (ret any)\n"
"func sys.ifaceT2E (typ *uint8, elem any) (ret any)\n"
"func sys.ifaceE2T (typ *uint8, elem any) (ret any)\n"
"func sys.ifaceE2I2 (typ *uint8, iface any) (ret any, ok bool)\n"
"func sys.ifaceE2T2 (typ *uint8, elem any) (ret any, ok bool)\n"
"func sys.ifaceT2I (typ1 *uint8, typ2 *uint8, elem any) (ret any)\n"
"func sys.ifaceI2T (typ *uint8, iface any) (ret any)\n"
"func sys.ifaceI2T2 (typ *uint8, iface any) (ret any, ok bool)\n"
"func sys.ifaceI2I (typ *uint8, iface any) (ret any)\n"
"func sys.ifaceI2Ix (typ *uint8, iface any) (ret any)\n"
"func sys.ifaceI2I2 (typ *uint8, iface any) (ret any, ok bool)\n"
"func sys.ifaceeq (i1 any, i2 any) (ret bool)\n"
"func sys.efaceeq (i1 any, i2 any) (ret bool)\n"
"func sys.ifacethash (i1 any) (ret uint32)\n"
@ -80,7 +80,8 @@ char *unsafeimport =
"func unsafe.Offsetof (? any) (? int)\n"
"func unsafe.Sizeof (? any) (? int)\n"
"func unsafe.Alignof (? any) (? int)\n"
"func unsafe.Reflect (i interface { }) (? uint64, ? string, ? bool)\n"
"func unsafe.Unreflect (? uint64, ? string, ? bool) (ret interface { })\n"
"func unsafe.Typeof (i interface { }) (typ interface { })\n"
"func unsafe.Reflect (i interface { }) (typ interface { }, addr unsafe.Pointer)\n"
"func unsafe.Unreflect (typ interface { }, addr unsafe.Pointer) (ret interface { })\n"
"\n"
"$$\n";

View File

@ -391,6 +391,7 @@ enum
enum
{
/* types of channel */
/* must match ../../pkg/nreflect/type.go:/Chandir */
Cxxx,
Crecv = 1<<0,
Csend = 1<<1,
@ -457,7 +458,10 @@ typedef struct Sig Sig;
struct Sig
{
char* name;
Sym* sym;
char* package;
Sym* isym;
Sym* tsym;
Type* type;
uint32 hash;
int32 perm;
int32 offset;
@ -736,7 +740,7 @@ int isnilinter(Type*);
int isddd(Type*);
Type* maptype(Type*, Type*);
Type* methtype(Type*);
Node* signame(Type*);
Node* typename(Type*);
int eqtype(Type*, Type*);
int cvttype(Type*, Type*);
int eqtypenoname(Type*, Type*);
@ -782,7 +786,6 @@ Type* funcnext(Iter*);
int brcom(int);
int brrev(int);
void setmaxarg(Type*);
Sig* lsort(Sig*, int(*)(Sig*, Sig*));
int dotoffset(Node*, int*, Node**);
void tempname(Node*, Type*);
@ -1073,7 +1076,7 @@ int isfat(Type*);
void clearfat(Node *n);
void cgen(Node*, Node*);
void gused(Node*);
void dumpsignatures(void);
void dumptypestructs(void);
void dumpfuncs(void);
void dumpdata(void);
void ggloblnod(Node *nam, int32 width);

View File

@ -28,7 +28,7 @@ dumpobj(void)
newplist();
dumpglobls();
dumpsignatures();
dumptypestructs();
dumpdata();
dumpfuncs();
@ -169,414 +169,3 @@ duintptr(Sym *s, int off, uint64 v)
{
return duintxx(s, off, v, widthptr);
}
static int
sigcmp(Sig *a, Sig *b)
{
return strcmp(a->name, b->name);
}
/*
* Add DATA for signature s.
* progt - type in program
* ifacet - type stored in interface (==progt if small, ==ptrto(progt) if large)
* rcvrt - type used as method interface. eqtype(ifacet, rcvrt) is always true,
* but ifacet might have a name that rcvrt does not.
* methodt - type with methods hanging off it (progt==*methodt sometimes)
*
* memory layout is Sigt struct from iface.c:
* struct Sigt
* {
* byte* name; // name of basic type
* Sigt* link; // for linking into hash tables
* uint32 thash; // hash of type
* uint32 mhash; // hash of methods
* uint16 width; // width of base type in bytes
* uint16 alg; // algorithm
* struct {
* byte* fname;
* uint32 fhash; // hash of type
* uint32 offset; // offset of substruct
* void (*fun)(void);
* } meth[1]; // one or more - last name is nil
* };
*/
void
dumpsigt(Type *progt, Type *ifacet, Type *rcvrt, Type *methodt, Sym *s)
{
Type *f;
int o;
Sig *a, *b;
char buf[NSYMB];
Type *this;
Prog *oldlist;
Sym *method;
uint32 sighash;
int ot;
if(debug['r']) {
print("dumpsigt progt=%T ifacet=%T rcvrt=%T methodt=%T s=%S\n",
progt, ifacet, rcvrt, methodt, s);
}
a = nil;
o = 0;
oldlist = nil;
sighash = typehash(progt, 1, 0);
for(f=methodt->method; f!=T; f=f->down) {
if(f->type->etype != TFUNC)
continue;
if(f->etype != TFIELD)
fatal("dumpsignatures: not field");
method = f->sym;
if(method == nil)
continue;
// get receiver type for this particular method.
this = getthisx(f->type)->type->type;
if(f->embedded != 2 && isptr[this->etype] && !isptr[progt->etype] && !isifacemethod(f)) {
// pointer receiver method but value method set.
// ignore.
if(debug['r'])
print("ignore %T for %T\n", f, progt);
continue;
}
b = mal(sizeof(*b));
b->link = a;
a = b;
a->name = method->name;
a->hash = PRIME8*stringhash(a->name) + PRIME9*typehash(f->type, 0, 0);
if(!exportname(a->name))
a->hash += PRIME10*stringhash(package);
a->perm = o;
a->sym = methodsym(method, rcvrt);
sighash = sighash*100003 + a->hash;
if(!a->sym->siggen) {
a->sym->siggen = 1;
if(!eqtype(this, ifacet)) {
if(oldlist == nil)
oldlist = pc;
// It would be 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(f->embedded && isptr[ifacet->etype] && !isifacemethod(f))
genembedtramp(ifacet, f, a->sym);
else
genwrapper(ifacet, f, a->sym);
}
}
o++;
}
// restore data output
if(oldlist) {
// old list ended with AEND; change to ANOP
// so that the trampolines that follow can be found.
nopout(oldlist);
// start new data list
newplist();
}
a = lsort(a, sigcmp);
ot = 0;
ot = rnd(ot, maxround); // base structure
// base of type signature contains parameters
snprint(buf, sizeof buf, "%#T", progt);
ot = dstringptr(s, ot, buf); // name
ot = duintptr(s, ot, 0); // skip link
ot = duint32(s, ot, typehash(progt, 1, 0)); // thash
ot = duint32(s, ot, sighash); // mhash
ot = duint16(s, ot, progt->width); // width
ot = duint16(s, ot, algtype(progt)); // algorithm
for(b=a; b!=nil; b=b->link) {
ot = rnd(ot, maxround); // base of substructure
ot = dstringptr(s, ot, b->name); // field name
ot = duint32(s, ot, b->hash); // hash
ot = duint32(s, ot, 0); // offset
ot = dsymptr(s, ot, b->sym, 0); // &method
}
// nil field name at end
ot = rnd(ot, maxround);
ot = duintptr(s, ot, 0);
// set DUPOK to allow other .6s to contain
// the same signature. only one will be chosen.
// should only happen for empty signatures
ggloblsym(s, ot, a == nil);
}
/*
* memory layout is Sigi struct from iface.c:
* struct Sigi
* {
* byte* name;
* uint32 hash;
* uint32 size; // number of methods
* struct {
* byte* fname;
* uint32 fhash;
* uint32 perm; // location of fun in Sigt
* } meth[1]; // [size+1] - last name is nil
* };
*/
void
dumpsigi(Type *t, Sym *s)
{
Type *f;
Sym *s1;
int o;
Sig *a, *b;
char buf[NSYMB];
uint32 sighash;
int ot;
a = nil;
o = 0;
sighash = 0;
for(f=t->type; f!=T; f=f->down) {
if(f->type->etype != TFUNC)
continue;
if(f->etype != TFIELD)
fatal("dumpsignatures: not field");
s1 = f->sym;
if(s1 == nil)
continue;
b = mal(sizeof(*b));
b->link = a;
a = b;
a->name = s1->name;
a->hash = PRIME8*stringhash(a->name) + PRIME9*typehash(f->type, 0, 0);
if(!exportname(a->name))
a->hash += PRIME10*stringhash(package);
a->perm = o;
a->sym = methodsym(f->sym, t);
a->offset = 0;
sighash = sighash*100003 + a->hash;
o++;
}
a = lsort(a, sigcmp);
ot = 0;
ot = rnd(ot, maxround); // base structure
// sigi[0].name = type name, for runtime error message
snprint(buf, sizeof buf, "%#T", t);
ot = dstringptr(s, ot, buf);
// first field of an interface signature
// contains the count and is not a real entry
// sigi[0].hash = sighash
ot = duint32(s, ot, sighash);
// sigi[0].offset = count
o = 0;
for(b=a; b!=nil; b=b->link)
o++;
ot = duint32(s, ot, o);
for(b=a; b!=nil; b=b->link) {
//print(" %s\n", b->name);
ot = rnd(ot, maxround); // base structure
// sigx[++].name = "fieldname"
// sigx[++].hash = hashcode
// sigi[++].perm = mapped offset of method
ot = dstringptr(s, ot, b->name);
ot = duint32(s, ot, b->hash);
ot = duint32(s, ot, b->perm);
}
// nil field name at end
ot = rnd(ot, maxround);
ot = duintptr(s, ot, 0);
// TODO(rsc): DUPOK should not be necessary here,
// and I am a bit worried that it is. If I turn it off,
// I get multiple definitions for sigi.dotdotdot.
ggloblsym(s, ot, 1);
}
void
dumpsignatures(void)
{
int et;
Dcl *d, *x;
Type *t, *progt, *methodt, *ifacet, *rcvrt;
Sym *s;
Node *n;
// copy externdcl list to signatlist
for(d=externdcl; d!=D; d=d->forw) {
if(d->op != OTYPE)
continue;
t = d->dtype;
if(t == T)
continue;
n = signame(t);
if(n == N || n->sym == S)
continue;
s = n->sym;
x = mal(sizeof(*d));
x->op = OTYPE;
if(t->etype == TINTER)
x->dtype = t;
else
x->dtype = ptrto(t);
x->forw = signatlist;
x->block = 0;
signatlist = x;
//print("SIG = %lS %lS %lT\n", d->dsym, s, t);
}
// process signatlist
for(d=signatlist; d!=D; d=d->forw) {
if(d->op != OTYPE)
continue;
t = d->dtype;
et = t->etype;
n = signame(t);
//print("signame %S for %T\n", s, t);
if(n == N || n->sym == S)
continue;
s = n->sym;
// only emit one
if(s->siggen)
continue;
s->siggen = 1;
// interface is easy
if(et == TINTER || et == TDDD) {
if(t->sym && !t->local)
continue;
dumpsigi(t, s);
continue;
}
// non-interface is more complex
progt = t;
methodt = t;
ifacet = t;
rcvrt = t;
// if there's a pointer, methods are on base.
methodt = methtype(progt);
if(methodt == T) {
// if that failed, go back to progt,
// assuming we're writing out a signature
// for a type with no methods
methodt = progt;
} else {
expandmeth(methodt->sym, methodt);
}
// if ifacet is too wide, the methods will see a pointer.
if(ifacet->width > widthptr) {
ifacet = ptrto(progt);
rcvrt = ptrto(progt);
}
// don't emit non-trivial signatures for types defined outside this file.
// non-trivial signatures might also drag in generated trampolines,
// and ar can't handle duplicate functions.
// only pay attention to types with symbols, because
// the ... structs and maybe other internal structs
// don't get marked as local.
if(methodt->method && methodt->sym && !methodt->local)
continue;
//print("s=%S\n", s);
dumpsigt(progt, ifacet, rcvrt, methodt, s);
}
}
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;
}

692
src/cmd/gc/reflect.c Normal file
View File

@ -0,0 +1,692 @@
// 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 "go.h"
/*
* runtime interface and reflection data structures
*/
static Sym* dtypesym(Type*);
static int
sigcmp(Sig *a, Sig *b)
{
return strcmp(a->name, b->name);
}
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.
*/
static Type*
methodfunc(Type *f)
{
Node *in, *out, *d;
Type *t;
in = N;
if(!isifacemethod(f)) {
d = nod(ODCLFIELD, N, N);
d->type = getthisx(f->type)->type->type;
in = list(in, d);
}
for(t=getinargx(f->type)->type; t; t=t->down) {
d = nod(ODCLFIELD, N, N);
d->type = t->type;
in = list(in, d);
}
out = N;
for(t=getoutargx(f->type)->type; t; t=t->down) {
d = nod(ODCLFIELD, N, N);
d->type = t->type;
out = list(out, d);
}
return functype(N, rev(in), rev(out));
}
/*
* return methods of non-interface type t,
* sorted by hash.
* generates stub functions as needed.
*/
static Sig*
methods(Type *t)
{
int o;
Type *f, *mt, *it, *this;
Sig *a, *b;
Sym *method;
Prog *oldlist;
// 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;
o = 0;
oldlist = nil;
for(f=mt->method; 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] && !isptr[t->etype]
&& f->embedded != 2 && !isifacemethod(f))
continue;
b = mal(sizeof(*b));
b->link = a;
a = b;
a->name = method->name;
a->hash = PRIME8*stringhash(a->name) + PRIME9*typehash(f->type, 0, 0);
if(!exportname(a->name)) {
a->package = method->package;
a->hash += PRIME10*stringhash(a->package);
}
a->perm = o++;
a->isym = methodsym(method, it);
a->tsym = methodsym(method, t);
a->type = methodfunc(f);
if(!a->isym->siggen) {
a->isym->siggen = 1;
if(!eqtype(this, it)) {
if(oldlist == nil)
oldlist = pc;
// 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))
genembedtramp(it, f, a->isym);
else
genwrapper(it, f, a->isym);
}
}
if(!a->tsym->siggen) {
a->tsym->siggen = 1;
if(!eqtype(this, t)) {
if(oldlist == nil)
oldlist = pc;
if(isptr[it->etype] && isptr[this->etype]
&& f->embedded && !isifacemethod(f))
genembedtramp(t, f, a->tsym);
else
genwrapper(t, f, a->tsym);
}
}
}
// restore data output
if(oldlist) {
// old list ended with AEND; change to ANOP
// so that the trampolines that follow can be found.
nopout(oldlist);
// start new data list
newplist();
}
return lsort(a, sigcmp);
}
/*
* return methods of interface type t, sorted by hash.
*/
Sig*
imethods(Type *t)
{
Sig *a, *b;
int o;
Type *f;
a = nil;
o = 0;
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;
b = mal(sizeof(*b));
b->link = a;
a = b;
a->name = f->sym->name;
a->hash = PRIME8*stringhash(a->name) + PRIME9*typehash(f->type, 0, 0);
if(!exportname(a->name)) {
a->package = f->sym->package;
a->hash += PRIME10*stringhash(a->package);
}
a->perm = o++;
a->offset = 0;
a->type = methodfunc(f);
}
return lsort(a, sigcmp);
}
/*
* uncommonType
* ../../pkg/runtime/type.go:/uncommonType
*/
static Sym*
dextratype(Type *t)
{
int ot, n;
char *p;
Sym *s;
Sig *a, *m;
m = methods(t);
if(t->sym == nil && m == nil)
return nil;
n = 0;
for(a=m; a; a=a->link) {
dtypesym(a->type);
n++;
}
p = smprint("%#-T", t);
s = pkglookup(p, "extratype");
ot = 0;
if(t->sym) {
ot = dgostringptr(s, ot, t->sym->name);
if(t != types[t->etype])
ot = dgostringptr(s, ot, t->sym->package);
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 = duint32(s, ot, a->hash);
ot = rnd(ot, widthptr);
ot = dgostringptr(s, ot, a->name);
ot = dgostringptr(s, ot, a->package);
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);
}
ggloblsym(s, ot, 1);
return s;
}
static char*
structnames[] =
{
[TINT] = "*runtime.IntType",
[TUINT] = "*runtime.UintType",
[TINT8] = "*runtime.Int8Type",
[TUINT8] = "*runtime.Uint8Type",
[TINT16] = "*runtime.Int16Type",
[TUINT16] = "*runtime.Uint16Type",
[TINT32] = "*runtime.Int32Type",
[TUINT32] = "*runtime.Uint32Type",
[TINT64] = "*runtime.Int64Type",
[TUINT64] = "*runtime.Uint64Type",
[TUINTPTR] = "*runtime.UintptrType",
[TFLOAT] = "*runtime.FloatType",
[TFLOAT32] = "*runtime.Float32Type",
[TFLOAT64] = "*runtime.Float64Type",
[TBOOL] = "*runtime.BoolType",
[TSTRING] = "*runtime.StringType",
[TDDD] = "*runtime.DotDotDotType",
[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";
if(isptr[et] && t->type->etype == TANY)
name = "*runtime.UnsafePointerType";
return pkglookup(name, "type");
}
/*
* commonType
* ../../pkg/runtime/type.go:/commonType
*/
static int
dcommontype(Sym *s, int ot, Type *t)
{
int i;
Sym *s1;
Type *elem;
char *p;
s1 = dextratype(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;
// string *string;
// *nameInfo;
// }
ot = duintptr(s, ot, t->width);
ot = duint32(s, ot, typehash(t, 1, 0));
ot = duint8(s, ot, algtype(t));
elem = t;
while(elem->etype == TARRAY && elem->bound >= 0)
elem = elem->type;
i = elem->width;
if(i > maxround)
i = maxround;
ot = duint8(s, ot, i); // align
ot = duint8(s, ot, i); // fieldAlign
p = smprint("%#-T", t);
ot = dgostringptr(s, ot, p); // string
free(p);
if(s1)
ot = dsymptr(s, ot, s1, 0); // extraType
else
ot = duintptr(s, ot, 0);
return ot;
}
Sym*
typesym(Type *t)
{
char *p;
Sym *s;
p = smprint("%#-T", t);
s = pkglookup(p, "type");
free(p);
return s;
}
Node*
typename(Type *t)
{
Sym *s;
Node *n;
Dcl *d;
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;
// copy to signatlist
d = dcl();
d->dsym = s;
d->dtype = t;
d->op = OTYPE;
d->forw = signatlist;
signatlist = d;
}
n = nod(OADDR, s->def, N);
n->type = ptrto(s->def->type);
n->addable = 1;
n->ullman = 2;
return n;
}
Sym*
dtypesym(Type *t)
{
int ot, n;
Sym *s, *s1, *s2;
Sig *a, *m;
Type *t1;
s = typesym(t);
if(s->siggen)
return s;
s->siggen = 1;
// special case (look for runtime below):
// when compiling package runtime,
// emit the type structures for int, float, etc.
t1 = T;
if(isptr[t->etype])
t1 = t->type;
if(strcmp(package, "runtime") == 0) {
if(t == types[t->etype])
goto ok;
if(t1 && t1 == types[t1->etype])
goto ok;
}
// named types from other files are defined in those files
if(t->sym && !t->local)
return s;
if(!t->sym && t1 && t1->sym && !t1->local)
return s;
if(isforw[t->etype] || (t1 && isforw[t1->etype]))
return s;
ok:
ot = 0;
switch(t->etype) {
default:
ot = dcommontype(s, ot, t);
break;
case TARRAY:
// ../../pkg/runtime/type.go:/ArrayType
s1 = dtypesym(t->type);
ot = dcommontype(s, ot, t);
ot = dsymptr(s, ot, s1, 0);
if(t->bound < 0)
ot = duintptr(s, ot, -1);
else
ot = duintptr(s, ot, t->bound);
break;
case TCHAN:
// ../../pkg/runtime/type.go:/ChanType
s1 = dtypesym(t->type);
ot = dcommontype(s, ot, t);
ot = dsymptr(s, ot, s1, 0);
ot = duintptr(s, ot, t->chan);
break;
case TFORWSTRUCT:
case TFORWINTER:
return s;
case TFUNC:
for(t1=getthisx(t)->type; t1; t1=t1->down)
dtypesym(t1->type);
for(t1=getinargx(t)->type; t1; t1=t1->down)
dtypesym(t1->type);
for(t1=getoutargx(t)->type; t1; t1=t1->down)
dtypesym(t1->type);
ot = dcommontype(s, ot, t);
// two slice headers: in and out.
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);
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 = duint32(s, ot, a->hash);
ot = duint32(s, ot, a->perm);
ot = dgostringptr(s, ot, a->name);
ot = dgostringptr(s, ot, a->package);
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);
ot = dsymptr(s, ot, s1, 0);
ot = dsymptr(s, ot, s2, 0);
break;
case TPTR32:
case TPTR64:
if(t->type->etype == TANY) {
ot = dcommontype(s, ot, t);
break;
}
// ../../pkg/runtime/type.go:/PtrType
s1 = dtypesym(t->type);
ot = dcommontype(s, ot, t);
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);
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) {
ot = dgostringptr(s, ot, t1->sym->name);
if(exportname(t1->sym->name))
ot = dgostringptr(s, ot, nil);
else
ot = dgostringptr(s, ot, t1->sym->package);
} 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;
}
ggloblsym(s, ot, 1);
return s;
}
void
dumptypestructs(void)
{
int i;
Dcl *d, *x;
Type *t;
// copy types from externdcl list to signatlist
for(d=externdcl; d!=D; d=d->forw) {
if(d->op != OTYPE)
continue;
t = d->dtype;
x = mal(sizeof(*x));
x->op = OTYPE;
x->dtype = t;
x->forw = signatlist;
x->block = 0;
signatlist = x;
}
// process signatlist
for(d=signatlist; d!=D; d=d->forw) {
if(d->op != OTYPE)
continue;
t = d->dtype;
dtypesym(t);
if(t->sym && !isptr[t->etype])
dtypesym(ptrto(t));
}
// do basic types if compiling package runtime, type.go.
// they have to be in at least one package,
// and reflect 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(strcmp(package, "runtime") == 0 && strcmp(filename, "type") == 0) {
for(i=1; i<=TBOOL; i++)
if(i != TFLOAT80)
dtypesym(ptrto(types[i]));
dtypesym(ptrto(types[TSTRING]));
dtypesym(typ(TDDD));
dtypesym(ptrto(pkglookup("Pointer", "unsafe")->def->type));
}
}

View File

@ -1613,64 +1613,6 @@ iscomposite(Type *t)
return 0;
}
Node*
signame(Type *t)
{
Sym *ss;
char *e;
Dcl *x;
char buf[NSYMB];
//print("signame %T\n", t);
if(t == T)
goto bad;
e = "sigt";
if(t->etype == TINTER || t->etype == TDDD)
e = "sigi";
// name is exported name, like *[]byte or *Struct or Interface
// (special symbols don't bother the linker).
snprint(buf, sizeof(buf), "%#T", t);
// special case: empty interface is named sigi.empty
// so that it can be referred to by the runtime.
if(strcmp(buf, "interface { }") == 0)
strcpy(buf, "empty");
// special case: sigi.... is just too hard to read in assembly.
if(strcmp(buf, "...") == 0)
strcpy(buf, "dotdotdot");
ss = pkglookup(buf, e);
if(ss->def == N) {
ss->def = newname(ss);
ss->def->type = types[TUINT8];
ss->def->class = PEXTERN;
}
//print("siggen %T %d\n", t, t->siggen);
if(!t->siggen) {
// special case: don't generate the empty interface
if(strcmp(buf, "empty") == 0)
goto out;
// record internal type for signature generation
x = mal(sizeof(*x));
x->op = OTYPE;
x->dtype = t;
x->forw = signatlist;
t->siggen = 1;
signatlist = x;
}
out:
return ss->def;
bad:
return N;
}
int
eqtype1(Type *t1, Type *t2, int d, int names)
{

View File

@ -2,12 +2,12 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package PACKAGE
type Pointer *any;
func Offsetof(any) int;
func Sizeof(any) int;
func Alignof(any) int;
func Reflect(i interface { }) (uint64, string, bool);
func Unreflect(uint64, string, bool) (ret interface { });
func Typeof(i interface { }) (typ interface{});
func Reflect(i interface { }) (typ interface{}, addr Pointer);
func Unreflect(typ interface{}, addr Pointer) (ret interface { });

View File

@ -1940,7 +1940,6 @@ loop:
Type*
sigtype(Type *st)
{
Dcl *x;
Sym *s;
Type *t;
static int sigdddgen;
@ -1954,16 +1953,6 @@ sigtype(Type *st)
t = dodcltype(t);
updatetype(t, st);
t->local = 1;
// record internal type for signature generation
x = mal(sizeof(*x));
x->op = OTYPE;
x->dsym = s;
x->dtype = t;
x->forw = signatlist;
x->block = block;
signatlist = x;
return t;
}
@ -3260,10 +3249,10 @@ ifacecvt(Type *tl, Node *n, int et)
a = n; // elem
r = a;
a = nod(OADDR, signame(tr), N); // sigt
a = typename(tr); // sigt
r = list(a, r);
a = nod(OADDR, signame(tl), N); // sigi
a = typename(tl); // sigi
r = list(a, r);
on = syslook("ifaceT2I", 1);
@ -3284,7 +3273,7 @@ ifacecvt(Type *tl, Node *n, int et)
a = n; // interface
r = a;
a = nod(OADDR, signame(tl), N); // sigi or sigt
a = typename(tl); // sigi or sigt
r = list(a, r);
on = syslook(ifacename[et], 1);
@ -3308,7 +3297,7 @@ ifacecvt(Type *tl, Node *n, int et)
a = n; // elem
r = a;
a = nod(OADDR, signame(tr), N); // sigt
a = typename(tr); // sigt
r = list(a, r);
on = syslook("ifaceT2E", 1);