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libthread_db: unsign map_len and use reallocarray(3).
Lengths are not negative, so map_len should be unsigned. Unsign the corresponding indexes too and bring a small use of reallocarray(3). Reorder the memset to be consistent with the realloc: it appears we were only clearing half the memory in pt_map_thread(). MFC after: 2 weeks
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parent
2d445fb18c
commit
1f2b051d84
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=317200
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@ -74,7 +74,8 @@ pt_map_thread(const td_thragent_t *const_ta, psaddr_t pt, enum pt_type type)
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{
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td_thragent_t *ta = __DECONST(td_thragent_t *, const_ta);
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struct pt_map *new;
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int i, first = -1;
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int first = -1;
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unsigned int i;
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/* leave zero out */
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for (i = 1; i < ta->map_len; ++i) {
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@ -94,12 +95,12 @@ pt_map_thread(const td_thragent_t *const_ta, psaddr_t pt, enum pt_type type)
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ta->map_len = 20;
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first = 1;
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} else {
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new = realloc(ta->map,
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sizeof(struct pt_map) * ta->map_len * 2);
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new = reallocarray(ta->map, ta->map_len,
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2 * sizeof(struct pt_map));
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if (new == NULL)
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return (-1);
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memset(new + ta->map_len, '\0', sizeof(struct pt_map) *
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ta->map_len);
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memset(new + ta->map_len, '\0', ta->map_len *
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2 * sizeof(struct pt_map));
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first = ta->map_len;
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ta->map = new;
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ta->map_len *= 2;
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@ -1047,7 +1048,7 @@ pt_thr_sstep(const td_thrhandle_t *th, int step)
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static void
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pt_unmap_lwp(const td_thragent_t *ta, lwpid_t lwp)
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{
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int i;
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unsigned int i;
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for (i = 0; i < ta->map_len; ++i) {
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if (ta->map[i].type == PT_LWP && ta->map[i].lwp == lwp) {
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@ -77,7 +77,7 @@ struct td_thragent {
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int thread_off_sigmask;
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int thread_off_sigpend;
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struct pt_map *map;
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int map_len;
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unsigned int map_len;
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};
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void pt_md_init(void);
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