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suppress integer overflow warnings

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* random.c: annotate rb_hash_start with NO_SANITIZE (seed.key.hash + h
  overflows and that seems intentional)
* bignum.c: avoid (size_t)--
* cont.c: ditto
* util.c: ditto
* vm_insnhelper.c: ditto



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65688 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
shyouhei 2018-11-13 00:40:52 +00:00
parent 803dcea481
commit 7f6691ae77
5 changed files with 21 additions and 13 deletions
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7
bignum.c
View file

@ -2587,10 +2587,9 @@ bigdivrem_single1(BDIGIT *qds, const BDIGIT *xds, size_t xn, BDIGIT x_higher_bdi
size_t i;
BDIGIT_DBL t2;
t2 = x_higher_bdigit;
i = xn;
while (i--) {
t2 = BIGUP(t2) + xds[i];
qds[i] = (BDIGIT)(t2 / y);
for (i = 0; i < xn; i++) {
t2 = BIGUP(t2) + xds[xn - i - 1];
qds[xn - i - 1] = (BDIGIT)(t2 / y);
t2 %= y;
}
return (BDIGIT)t2;

12
cont.c
View file

@ -1199,7 +1199,7 @@ rollback_ensure_stack(VALUE self,rb_ensure_list_t *current,rb_ensure_entry_t *ta
{
rb_ensure_list_t *p;
rb_ensure_entry_t *entry;
size_t i;
size_t i, j;
size_t cur_size;
size_t target_size;
size_t base_point;
@ -1237,11 +1237,11 @@ rollback_ensure_stack(VALUE self,rb_ensure_list_t *current,rb_ensure_entry_t *ta
cur_size--;
}
/* push ensure stack */
while (i--) {
func = (VALUE (*)(ANYARGS)) lookup_rollback_func(target[i].e_proc);
if ((VALUE)func != Qundef) {
(*func)(target[i].data2);
}
for (j = 0; j < i; j++) {
func = (VALUE (*)(ANYARGS)) lookup_rollback_func(target[i - j - 1].e_proc);
if ((VALUE)func != Qundef) {
(*func)(target[i - j - 1].data2);
}
}
}

1
random.c
View file

@ -1573,6 +1573,7 @@ init_seed(struct MT *mt)
seed.u32[i] = genrand_int32(mt);
}
NO_SANITIZE("unsigned-integer-overflow", extern st_index_t rb_hash_start(st_index_t h));
st_index_t
rb_hash_start(st_index_t h)
{

10
util.c
View file

@ -54,8 +54,16 @@ ruby_scan_hex(const char *start, size_t len, size_t *retlen)
register const char *s = start;
register unsigned long retval = 0;
const char *tmp;
size_t i = 0;
while (len-- && *s && (tmp = strchr(hexdigit, *s))) {
for (i = 0; i < len; i++) {
if (! s[0]) {
break;
}
tmp = strchr(hexdigit, *s);
if (! tmp) {
break;
}
retval <<= 4;
retval |= (tmp - hexdigit) & 15;
s++;

4
vm_insnhelper.c
View file

@ -3211,7 +3211,7 @@ vm_opt_newarray_max(rb_num_t num, const VALUE *ptr)
else {
struct cmp_opt_data cmp_opt = { 0, 0 };
VALUE result = *ptr;
rb_num_t i = num - 1;
rb_snum_t i = num - 1;
while (i-- > 0) {
const VALUE v = *++ptr;
if (OPTIMIZED_CMP(v, result, cmp_opt) > 0) {
@ -3237,7 +3237,7 @@ vm_opt_newarray_min(rb_num_t num, const VALUE *ptr)
else {
struct cmp_opt_data cmp_opt = { 0, 0 };
VALUE result = *ptr;
rb_num_t i = num - 1;
rb_snum_t i = num - 1;
while (i-- > 0) {
const VALUE v = *++ptr;
if (OPTIMIZED_CMP(v, result, cmp_opt) < 0) {