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util/romcc: Use 64 bit integers when shifting 

'used_indices' is 64 bits wide, so use a fixed-width type to make
that clear. As such, 'index' can have a value of up to 63, so use a
64 bit integer when doing the shifts to prevent overflow.

Found-by: Coverity Scan CID 1287090
Signed-off-by: Jacob Garber <jgarber1@ualberta.ca>
Change-Id: Ibd089df6be60c8ea46da11e5e83cd58b2e2c54d6
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32854
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Jacob Garber 2019-05-17 14:55:04 -06:00 committed by Patrick Georgi
parent 1dda496a74
commit 40a85f85c6
1 changed files with 5 additions and 5 deletions
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10
util/romcc/romcc.c
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@ -14111,7 +14111,7 @@ static void compute_closure_variables(struct compile_state *state,
struct block *block;
struct triple *old_result, *first, *ins;
size_t count, idx;
unsigned long used_indices;
uint64_t used_indices;
int i, max_index;
#define MAX_INDICES (sizeof(used_indices)*CHAR_BIT)
#define ID_BITS(X) ((X) & (TRIPLE_FLAG_LOCAL -1))
@ -14217,11 +14217,11 @@ static void compute_closure_variables(struct compile_state *state,
if (index >= MAX_INDICES) {
internal_error(state, ins, "index unexpectedly large");
}
if (used_indices & (1 << index)) {
if (used_indices & ((uint64_t)1 << index)) {
internal_error(state, ins, "index previously used?");
}
/* Remember which indices have been used */
used_indices |= (1 << index);
used_indices |= ((uint64_t)1 << index);
if (index > max_index) {
max_index = index;
}
@ -14249,7 +14249,7 @@ static void compute_closure_variables(struct compile_state *state,
}
info[ID_BITS(ins->id)].index = index;
/* Remember which indices have been used */
used_indices |= (1 << index);
used_indices |= ((uint64_t)1 << index);
if (index > max_index) {
max_index = index;
}
@ -14263,7 +14263,7 @@ static void compute_closure_variables(struct compile_state *state,
for(i = 0; i <= max_index; i++) {
struct triple *var;
var = 0;
if (used_indices & (1 << i)) {
if (used_indices & ((uint64_t)1 << i)) {
for(set = vars; set; set = set->next) {
int index;
index = info[ID_BITS(set->member->id)].index;