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runtime: add (unused for now) gc field to type information

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R=rsc
CC=golang-dev
https://golang.org/cl/6255074
This commit is contained in:
Jan Ziak 2012-06-02 14:02:44 -04:00 committed by Russ Cox
parent 322057cbfc
commit 65e61d5770
5 changed files with 17 additions and 11 deletions
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21
src/cmd/gc/reflect.c
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@ -546,15 +546,17 @@ dcommontype(Sym *s, int ot, Type *t)
// ../../pkg/reflect/type.go:/^type.commonType // ../../pkg/reflect/type.go:/^type.commonType
// actual type structure // actual type structure
// type commonType struct { // type commonType struct {
// size uintptr; // size uintptr
// hash uint32; // hash uint32
// alg uint8; // _ uint8
// align uint8; // align uint8
// fieldAlign uint8; // fieldAlign uint8
// kind uint8; // kind uint8
// string *string; // alg unsafe.Pointer
// *extraType; // gc unsafe.Pointer
// ptrToThis *Type // string *string
// *extraType
// ptrToThis *Type
// } // }
ot = duintptr(s, ot, t->width); ot = duintptr(s, ot, t->width);
ot = duint32(s, ot, typehash(t)); ot = duint32(s, ot, typehash(t));
@ -579,6 +581,7 @@ dcommontype(Sym *s, int ot, Type *t)
ot = dsymptr(s, ot, algarray, alg*sizeofAlg); ot = dsymptr(s, ot, algarray, alg*sizeofAlg);
else else
ot = dsymptr(s, ot, algsym, 0); ot = dsymptr(s, ot, algsym, 0);
ot = duintptr(s, ot, 0); // gc
p = smprint("%-uT", t); p = smprint("%-uT", t);
//print("dcommontype: %s\n", p); //print("dcommontype: %s\n", p);
ot = dgostringptr(s, ot, p); // string ot = dgostringptr(s, ot, p); // string

2
src/cmd/ld/dwarf.c
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@ -775,7 +775,7 @@ enum {
KindNoPointers = 1<<7, KindNoPointers = 1<<7,
// size of Type interface header + CommonType structure. // size of Type interface header + CommonType structure.
CommonSize = 2*PtrSize+ 5*PtrSize + 8, CommonSize = 2*PtrSize+ 6*PtrSize + 8,
}; };
static Reloc* static Reloc*

1
src/pkg/reflect/type.go
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@ -244,6 +244,7 @@ type commonType struct {
fieldAlign uint8 // alignment of struct field with this type fieldAlign uint8 // alignment of struct field with this type
kind uint8 // enumeration for C kind uint8 // enumeration for C
alg *uintptr // algorithm table (../runtime/runtime.h:/Alg) alg *uintptr // algorithm table (../runtime/runtime.h:/Alg)
gc uintptr // garbage collection data
string *string // string form; unnecessary but undeniably useful string *string // string form; unnecessary but undeniably useful
*uncommonType // (relatively) uncommon fields *uncommonType // (relatively) uncommon fields
ptrToThis *runtimeType // pointer to this type, if used in binary or has methods ptrToThis *runtimeType // pointer to this type, if used in binary or has methods

3
src/pkg/runtime/type.go
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@ -21,7 +21,8 @@ type commonType struct {
align uint8 align uint8
fieldAlign uint8 fieldAlign uint8
kind uint8 kind uint8
alg *uintptr alg unsafe.Pointer
gc unsafe.Pointer
string *string string *string
*uncommonType *uncommonType
ptrToThis *interface{} ptrToThis *interface{}

1
src/pkg/runtime/type.h
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@ -28,6 +28,7 @@ struct CommonType
uint8 fieldAlign; uint8 fieldAlign;
uint8 kind; uint8 kind;
Alg *alg; Alg *alg;
void *gc;
String *string; String *string;
UncommonType *x; UncommonType *x;
Type *ptrto; Type *ptrto;