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py/qstr: Raise exception in qstr_from_strn if str to intern is too long.

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This commit is contained in:
Léa Saviot
2019-11-26 10:47:32 +01:00
parent c9d337d536
commit d0a65b01c0
1 changed files with 7 additions and 1 deletions
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8
python/src/py/qstr.c
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@@ -31,6 +31,7 @@
#include "py/mpstate.h"
#include "py/qstr.h"
#include "py/gc.h"
#include "py/runtime.h"
// NOTE: we are using linear arrays to store and search for qstr's (unique strings, interned strings)
// ultimately we will replace this with a static hash table of some kind
@@ -192,12 +193,17 @@ qstr qstr_from_str(const char *str) {
}
qstr qstr_from_strn(const char *str, size_t len) {
assert(len < (1 << (8 * MICROPY_QSTR_BYTES_IN_LEN)));
QSTR_ENTER();
qstr q = qstr_find_strn(str, len);
if (q == 0) {
// qstr does not exist in interned pool so need to add it
// check that len is not too big
if (len >= (1 << (8 * MICROPY_QSTR_BYTES_IN_LEN))) {
QSTR_EXIT();
mp_raise_msg(&mp_type_RuntimeError, "name too long");
}
// compute number of bytes needed to intern this string
size_t n_bytes = MICROPY_QSTR_BYTES_IN_HASH + MICROPY_QSTR_BYTES_IN_LEN + len + 1;