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mirror of https://github.com/golang/go synced 2024-11-21 14:44:40 -07:00

arm: bugfixes (stack clobbering, indices)

also changed zerodivide to output "BUG"

R=rsc
CC=golang-dev
https://golang.org/cl/1871055
This commit is contained in:
Kai Backman 2010-07-30 10:37:51 +03:00
parent 96ad9adef3
commit 8d76a15122
6 changed files with 97 additions and 86 deletions

View File

@ -4,33 +4,6 @@
#include "gg.h"
void
mgen(Node *n, Node *n1, Node *rg)
{
n1->ostk = 0;
n1->op = OEMPTY;
if(n->addable) {
*n1 = *n;
n1->ostk = 0;
if(n1->op == OREGISTER || n1->op == OINDREG)
reg[n->val.u.reg]++;
return;
}
if(n->type->width > widthptr)
tempname(n1, n->type);
else
regalloc(n1, n->type, rg);
cgen(n, n1);
}
void
mfree(Node *n)
{
if(n->op == OREGISTER)
regfree(n);
}
/*
* generate:
* res = n;
@ -269,10 +242,26 @@ cgen(Node *n, Node *res)
cgen(nl, res);
break;
}
mgen(nl, &n1, res);
gmove(&n1, res);
mfree(&n1);
if(nl->addable && !is64(nl->type)) {
regalloc(&n1, nl->type, res);
gmove(nl, &n1);
} else {
if(n->type->width > widthptr || is64(nl->type) || isfloat[nl->type->etype])
tempname(&n1, nl->type);
else
regalloc(&n1, nl->type, res);
cgen(nl, &n1);
}
if(n->type->width > widthptr || is64(n->type) || isfloat[n->type->etype])
tempname(&n2, n->type);
else
regalloc(&n2, n->type, N);
gmove(&n1, &n2);
gmove(&n2, res);
if(n1.op == OREGISTER)
regfree(&n1);
if(n2.op == OREGISTER)
regfree(&n2);
break;
case ODOT:
@ -460,6 +449,41 @@ ret:
;
}
/*
* generate array index into res.
* n might be any size; res is 32-bit.
* returns Prog* to patch to panic call.
*/
Prog*
cgenindex(Node *n, Node *res)
{
Node tmp, lo, hi, zero, n1, n2;
if(!is64(n->type)) {
cgen(n, res);
return nil;
}
tempname(&tmp, types[TINT64]);
cgen(n, &tmp);
split64(&tmp, &lo, &hi);
gmove(&lo, res);
if(debug['B']) {
splitclean();
return nil;
}
regalloc(&n1, types[TINT32], N);
regalloc(&n2, types[TINT32], N);
nodconst(&zero, types[TINT32], 0);
gmove(&hi, &n1);
gmove(&zero, &n2);
gcmp(ACMP, &n1, &n2);
regfree(&n2);
regfree(&n1);
splitclean();
return gbranch(ABNE, T);
}
/*
* generate:
* res = &n;
@ -469,10 +493,9 @@ agen(Node *n, Node *res)
{
Node *nl, *nr;
Node n1, n2, n3, n4, n5, tmp;
Prog *p1;
Prog *p1, *p2;
uint32 w;
uint64 v;
Type *t;
if(debug['g']) {
dump("\nagen-res", res);
@ -519,20 +542,20 @@ agen(Node *n, Node *res)
break;
case OINDEX:
// TODO(rsc): uint64 indices
p2 = nil; // to be patched to panicindex.
w = n->type->width;
if(nr->addable) {
agenr(nl, &n3, res);
if(!isconst(nr, CTINT)) {
tempname(&tmp, types[TINT32]);
cgen(nr, &tmp);
p2 = cgenindex(nr, &tmp);
regalloc(&n1, tmp.type, N);
gmove(&tmp, &n1);
}
} else if(nl->addable) {
if(!isconst(nr, CTINT)) {
tempname(&tmp, types[TINT32]);
cgen(nr, &tmp);
p2 = cgenindex(nr, &tmp);
regalloc(&n1, tmp.type, N);
gmove(&tmp, &n1);
}
@ -540,7 +563,7 @@ agen(Node *n, Node *res)
agen(nl, &n3);
} else {
tempname(&tmp, types[TINT32]);
cgen(nr, &tmp);
p2 = cgenindex(nr, &tmp);
nr = &tmp;
agenr(nl, &n3, res);
regalloc(&n1, tmp.type, N);
@ -602,12 +625,7 @@ agen(Node *n, Node *res)
break;
}
// type of the index
t = types[TUINT32];
if(issigned[n1.type->etype])
t = types[TINT32];
regalloc(&n2, t, &n1); // i
regalloc(&n2, types[TINT32], &n1); // i
gmove(&n1, &n2);
regfree(&n1);
@ -627,6 +645,8 @@ agen(Node *n, Node *res)
gcmp(optoas(OCMP, types[TUINT32]), &n2, &n4);
regfree(&n4);
p1 = gbranch(optoas(OLT, types[TUINT32]), T);
if(p2)
patch(p2, pc);
ginscall(panicindex, 0);
patch(p1, pc);
}
@ -653,10 +673,10 @@ agen(Node *n, Node *res)
else if(w == 8)
gshift(AADD, &n2, SHIFT_LL, 3, &n3);
} else {
regalloc(&n4, t, N);
nodconst(&n1, t, w);
regalloc(&n4, types[TUINT32], N);
nodconst(&n1, types[TUINT32], w);
gmove(&n1, &n4);
gins(optoas(OMUL, t), &n4, &n2);
gins(optoas(OMUL, types[TUINT32]), &n4, &n2);
gins(optoas(OADD, types[tptr]), &n2, &n3);
regfree(&n4);
gmove(&n3, res);
@ -1088,7 +1108,7 @@ stkof(Node *n)
t = structfirst(&flist, getoutarg(t));
if(t != T)
return t->width;
return t->width + 4; // correct for LR
break;
}

View File

@ -90,6 +90,7 @@ void ginscall(Node*, int);
* cgen
*/
void agen(Node*, Node*);
Prog* cgenindex(Node *, Node *);
void igen(Node*, Node*, Node*);
void agenr(Node *n, Node *a, Node *res);
vlong fieldoffset(Type*, Node*);

View File

@ -991,7 +991,7 @@ gshift(int as, Node *lhs, int32 stype, int32 sval, Node *rhs)
{
Prog *p;
if (sval <= 0 || sval > 32)
if(sval <= 0 || sval > 32)
fatal("bad shift value: %d", sval);
sval = sval&0x1f;
@ -1054,7 +1054,7 @@ naddr(Node *n, Addr *a, int canemitcode)
break;
case OREGISTER:
if (n->val.u.reg <= REGALLOC_RMAX) {
if(n->val.u.reg <= REGALLOC_RMAX) {
a->type = D_REG;
a->reg = n->val.u.reg;
} else {
@ -1594,7 +1594,7 @@ sudoaddable(int as, Node *n, Addr *a, int *w)
int64 v;
Node n1, n2, n3, n4, *nn, *l, *r;
Node *reg, *reg1;
Prog *p1;
Prog *p1, *p2;
Type *t;
if(n->type == T)
@ -1732,8 +1732,8 @@ oindex:
if(issigned[r->type->etype])
t = types[TINT32];
regalloc(reg1, t, N);
regalloc(&n3, r->type, reg1);
cgen(r, &n3);
regalloc(&n3, types[TINT32], reg1);
p2 = cgenindex(r, &n3);
gmove(&n3, reg1);
regfree(&n3);
@ -1774,6 +1774,8 @@ oindex:
gcmp(optoas(OCMP, types[TUINT32]), reg1, &n3);
regfree(&n3);
p1 = gbranch(optoas(OLT, types[TUINT32]), T);
if(p2)
patch(p2, pc);
ginscall(panicindex, 0);
patch(p1, pc);
}
@ -1786,7 +1788,7 @@ oindex:
gmove(&n2, reg);
}
if (*w == 1)
if(*w == 1)
gins(AADD, reg1, reg);
else if(*w == 2)
gshift(AADD, reg1, SHIFT_LL, 1, reg);

View File

@ -1,5 +1,5 @@
./235.go
# ./64bit.go # flaky
# ./64bit.go # fail, flaky
./args.go
./assign.go
./assign1.go
@ -65,7 +65,7 @@
./indirect.go
./indirect1.go
./initcomma.go
# ./initialize.go # fail, BUG
./initialize.go
./initializerr.go
./initsyscall.go
./int_lit.go
@ -116,7 +116,7 @@
./varerr.go
./varinit.go
./vectors.go
./zerodivide.go
# ./zerodivide.go # fail, BUG
ken/array.go
ken/chan.go
ken/chan1.go
@ -179,7 +179,7 @@ interface/embed0.go
interface/embed1.go
interface/explicit.go
interface/fail.go
# interface/fake.go # fail
interface/fake.go
interface/pointer.go
interface/receiver.go
interface/receiver1.go
@ -408,7 +408,7 @@ fixedbugs/bug217.go
fixedbugs/bug218.go
fixedbugs/bug219.go
fixedbugs/bug220.go
# fixedbugs/bug221.go # fail
fixedbugs/bug221.go
fixedbugs/bug222.go
fixedbugs/bug223.go
fixedbugs/bug224.go
@ -423,14 +423,14 @@ fixedbugs/bug232.go
fixedbugs/bug233.go
fixedbugs/bug234.go
fixedbugs/bug235.go
# fixedbugs/bug236.go # fail
fixedbugs/bug236.go
fixedbugs/bug237.go
fixedbugs/bug238.go
fixedbugs/bug239.go
fixedbugs/bug240.go
fixedbugs/bug241.go
fixedbugs/bug242.go
# fixedbugs/bug243.go # fail
fixedbugs/bug243.go
fixedbugs/bug244.go
fixedbugs/bug245.go
fixedbugs/bug246.go
@ -458,7 +458,7 @@ fixedbugs/bug268.go
fixedbugs/bug269.go
fixedbugs/bug270.go
fixedbugs/bug271.go
# fixedbugs/bug272.go # fail
fixedbugs/bug272.go
fixedbugs/bug273.go
fixedbugs/bug274.go
fixedbugs/bug275.go
@ -467,7 +467,7 @@ fixedbugs/bug277.go
fixedbugs/bug278.go
fixedbugs/bug279.go
fixedbugs/bug280.go
# fixedbugs/bug281.go # fail, BUG
fixedbugs/bug281.go
fixedbugs/bug282.go
fixedbugs/bug283.go
fixedbugs/bug284.go

View File

@ -51,30 +51,6 @@ FAIL
=========== ./turing.go
Hello World!
=========== ./zerodivide.go
int 0/0: expected "divide"; got no error
int8 0/0: expected "divide"; got no error
int16 0/0: expected "divide"; got no error
int32 0/0: expected "divide"; got no error
int64 0/0: expected "divide"; got no error
int 1/0: expected "divide"; got no error
int8 1/0: expected "divide"; got no error
int16 1/0: expected "divide"; got no error
int32 1/0: expected "divide"; got no error
int64 1/0: expected "divide"; got no error
uint 0/0: expected "divide"; got no error
uint8 0/0: expected "divide"; got no error
uint16 0/0: expected "divide"; got no error
uint32 0/0: expected "divide"; got no error
uint64 0/0: expected "divide"; got no error
uintptr 0/0: expected "divide"; got no error
uint 1/0: expected "divide"; got no error
uint8 1/0: expected "divide"; got no error
uint16 1/0: expected "divide"; got no error
uint32 1/0: expected "divide"; got no error
uint64 1/0: expected "divide"; got no error
uintptr 1/0: expected "divide"; got no error
=========== ken/intervar.go
print 1 bio 2 file 3 -- abc

View File

@ -147,10 +147,22 @@ func main() {
case t.err == "" && err == "":
// fine
case t.err != "" && err == "":
if !bad {
bad = true
fmt.Printf("BUG\n")
}
fmt.Printf("%s: expected %q; got no error\n", t.name, t.err)
case t.err == "" && err != "":
if !bad {
bad = true
fmt.Printf("BUG\n")
}
fmt.Printf("%s: expected no error; got %q\n", t.name, err)
case t.err != "" && err != "":
if !bad {
bad = true
fmt.Printf("BUG\n")
}
if strings.Index(err, t.err) < 0 {
fmt.Printf("%s: expected %q; got %q\n", t.name, t.err, err)
continue