qbit/go
1
0
Fork 0
mirror of https://github.com/golang/go synced 2024-11-22 04:44:39 -07:00
Code Releases Activity

gc: avoid unsafe in defn of package runtime

Browse Source 
Keeps -u tracking simple.

R=ken2
CC=golang-dev
https://golang.org/cl/5495094
This commit is contained in:
Russ Cox 2011-12-19 15:52:15 -05:00
parent 55889409f8
commit 1d0f93b4be
4 changed files with 37 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
src/cmd/gc/builtin.c.boot
View File

@ -1,7 +1,6 @@
char *runtimeimport =
"package runtime\n"
"import runtime \"runtime\"\n"
"import unsafe \"unsafe\"\n"
"func @\"\".new(@\"\".typ *byte) *any\n"
"func @\"\".panicindex()\n"
"func @\"\".panicslice()\n"
@ -91,12 +90,12 @@ char *runtimeimport =
"func @\"\".sliceslice(@\"\".old []any, @\"\".lb uint64, @\"\".hb uint64, @\"\".width uint64) []any\n"
"func @\"\".slicearray(@\"\".old *any, @\"\".nel uint64, @\"\".lb uint64, @\"\".hb uint64, @\"\".width uint64) []any\n"
"func @\"\".closure()\n"
"func @\"\".memequal(@\"\".eq *bool, @\"\".size uintptr, @\"\".x @\"unsafe\".Pointer, @\"\".y @\"unsafe\".Pointer)\n"
"func @\"\".memequal8(@\"\".eq *bool, @\"\".size uintptr, @\"\".x @\"unsafe\".Pointer, @\"\".y @\"unsafe\".Pointer)\n"
"func @\"\".memequal16(@\"\".eq *bool, @\"\".size uintptr, @\"\".x @\"unsafe\".Pointer, @\"\".y @\"unsafe\".Pointer)\n"
"func @\"\".memequal32(@\"\".eq *bool, @\"\".size uintptr, @\"\".x @\"unsafe\".Pointer, @\"\".y @\"unsafe\".Pointer)\n"
"func @\"\".memequal64(@\"\".eq *bool, @\"\".size uintptr, @\"\".x @\"unsafe\".Pointer, @\"\".y @\"unsafe\".Pointer)\n"
"func @\"\".memequal128(@\"\".eq *bool, @\"\".size uintptr, @\"\".x @\"unsafe\".Pointer, @\"\".y @\"unsafe\".Pointer)\n"
"func @\"\".memequal(@\"\".eq *bool, @\"\".size uintptr, @\"\".x *any, @\"\".y *any)\n"
"func @\"\".memequal8(@\"\".eq *bool, @\"\".size uintptr, @\"\".x *any, @\"\".y *any)\n"
"func @\"\".memequal16(@\"\".eq *bool, @\"\".size uintptr, @\"\".x *any, @\"\".y *any)\n"
"func @\"\".memequal32(@\"\".eq *bool, @\"\".size uintptr, @\"\".x *any, @\"\".y *any)\n"
"func @\"\".memequal64(@\"\".eq *bool, @\"\".size uintptr, @\"\".x *any, @\"\".y *any)\n"
"func @\"\".memequal128(@\"\".eq *bool, @\"\".size uintptr, @\"\".x *any, @\"\".y *any)\n"
"func @\"\".int64div(? int64, ? int64) int64\n"
"func @\"\".uint64div(? uint64, ? uint64) uint64\n"
"func @\"\".int64mod(? int64, ? int64) int64\n"

14
src/cmd/gc/runtime.go
View File

@ -8,8 +8,6 @@
package PACKAGE
import "unsafe"
// emitted by compiler, not referred to by go programs
func new(typ *byte) *any
@ -123,12 +121,12 @@ func slicearray(old *any, nel uint64, lb uint64, hb uint64, width uint64) (ary [
func closure() // has args, but compiler fills in
func memequal(eq *bool, size uintptr, x, y unsafe.Pointer)
func memequal8(eq *bool, size uintptr, x, y unsafe.Pointer)
func memequal16(eq *bool, size uintptr, x, y unsafe.Pointer)
func memequal32(eq *bool, size uintptr, x, y unsafe.Pointer)
func memequal64(eq *bool, size uintptr, x, y unsafe.Pointer)
func memequal128(eq *bool, size uintptr, x, y unsafe.Pointer)
func memequal(eq *bool, size uintptr, x, y *any)
func memequal8(eq *bool, size uintptr, x, y *any)
func memequal16(eq *bool, size uintptr, x, y *any)
func memequal32(eq *bool, size uintptr, x, y *any)
func memequal64(eq *bool, size uintptr, x, y *any)
func memequal128(eq *bool, size uintptr, x, y *any)
// only used on 32-bit
func int64div(int64, int64) int64

21
src/cmd/gc/subr.c
View File

@ -2636,20 +2636,27 @@ eqfield(Node *p, Node *q, Node *field, Node *eq)
}
static Node*
eqmemfunc(vlong size)
eqmemfunc(vlong size, Type *type)
{
char buf[30];
Node *fn;
switch(size) {
default:
fn = syslook("memequal", 1);
break;
case 1:
case 2:
case 4:
case 8:
case 16:
snprint(buf, sizeof buf, "memequal%d", (int)size*8);
return syslook(buf, 0);
fn = syslook(buf, 1);
break;
}
return syslook("memequal", 0);
argtype(fn, type);
argtype(fn, type);
return fn;
}
// Return node for
@ -2663,12 +2670,14 @@ eqmem(Node *p, Node *q, Node *field, vlong size, Node *eq)
nx->etype = 1; // does not escape
ny = nod(OADDR, nod(OXDOT, q, field), N);
ny->etype = 1; // does not escape
typecheck(&nx, Erv);
typecheck(&ny, Erv);
call = nod(OCALL, eqmemfunc(size), N);
call = nod(OCALL, eqmemfunc(size, nx->type->type), N);
call->list = list(call->list, eq);
call->list = list(call->list, nodintconst(size));
call->list = list(call->list, conv(nx, types[TUNSAFEPTR]));
call->list = list(call->list, conv(ny, types[TUNSAFEPTR]));
call->list = list(call->list, nx);
call->list = list(call->list, ny);
nif = nod(OIF, N, N);
nif->ninit = list(nif->ninit, call);

16
src/cmd/gc/walk.c
View File

@ -2408,8 +2408,12 @@ eqfor(Type *t)
if(a != AMEM && a != -1)
fatal("eqfor %T", t);
if(a == AMEM)
return syslook("memequal", 0);
if(a == AMEM) {
n = syslook("memequal", 1);
argtype(n, t);
argtype(n, t);
return n;
}
sym = typesymprefix(".eq", t);
n = newname(sym);
@ -2417,8 +2421,8 @@ eqfor(Type *t)
ntype = nod(OTFUNC, N, N);
ntype->list = list(ntype->list, nod(ODCLFIELD, N, typenod(ptrto(types[TBOOL]))));
ntype->list = list(ntype->list, nod(ODCLFIELD, N, typenod(types[TUINTPTR])));
ntype->list = list(ntype->list, nod(ODCLFIELD, N, typenod(types[TUNSAFEPTR])));
ntype->list = list(ntype->list, nod(ODCLFIELD, N, typenod(types[TUNSAFEPTR])));
ntype->list = list(ntype->list, nod(ODCLFIELD, N, typenod(ptrto(t))));
ntype->list = list(ntype->list, nod(ODCLFIELD, N, typenod(ptrto(t))));
typecheck(&ntype, Etype);
n->type = ntype->type;
return n;
@ -2536,8 +2540,8 @@ walkcompare(Node **np, NodeList **init)
a->etype = 1; // does not escape
call->list = list(call->list, a);
call->list = list(call->list, nodintconst(t->width));
call->list = list(call->list, conv(l, types[TUNSAFEPTR]));
call->list = list(call->list, conv(r, types[TUNSAFEPTR]));
call->list = list(call->list, l);
call->list = list(call->list, r);
typecheck(&call, Etop);
walkstmt(&call);
*init = list(*init, call);