perf_thread_map__realloc
struct perf_thread_map *perf_thread_map__realloc(struct perf_thread_map *map, int nr);
#define thread_map__alloc(__nr) perf_thread_map__realloc(NULL, __nr)
tmp = perf_thread_map__realloc(threads, max_threads);
nt = perf_thread_map__realloc(threads, total_tasks);
nt = perf_thread_map__realloc(threads, ntasks);
#define thread_map__alloc(__nr) perf_thread_map__realloc(NULL, __nr)