DCL_HOOK_FUNC(static int, pthread_attr_setstacksize, void *target, size_t size) {
int res = old_pthread_attr_setstacksize((pthread_attr_t *) target, size);
LOGV("pthread_attr_setstacksize called in [tid, pid]: %d, %d", gettid(), getpid());
// Only perform unloading on the main thread
if (gettid() != getpid()) return res;
if (g_hook->should_unmap) {
g_hook->restore_plt_hook();
if (g_hook->should_unmap) {
void *start_addr = g_hook->start_addr;
size_t block_size = g_hook->block_size;
delete g_hook;
// Because both `pthread_attr_setstacksize` and `munmap` have the same function
// signature, we can use `musttail` to let the compiler reuse our stack frame and thus
// `munmap` will directly return to the caller of `pthread_attr_setstacksize`.
LOGD("unmap libzygisk.so loaded at %p with size %zu", start_addr, block_size);
[[clang::musttail]] return munmap(start_addr, block_size);
}
}
delete g_hook;
return res;
}
