613 lines
16 KiB
C
613 lines
16 KiB
C
/*
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* Copyright (C) 2019 Intel Corporation. All rights reserved.
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* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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*/
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#include "thread_manager.h"
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typedef struct {
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bh_list_link l;
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void (*destroy_cb)(WASMCluster *);
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} DestroyCallBackNode;
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static bh_list destroy_callback_list_head;
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static bh_list *const destroy_callback_list = &destroy_callback_list_head;
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static bh_list cluster_list_head;
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static bh_list *const cluster_list = &cluster_list_head;
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static korp_mutex cluster_list_lock;
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typedef void (*list_visitor)(void *, void *);
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static uint32 cluster_max_thread_num = CLUSTER_MAX_THREAD_NUM;
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/* Set the maximum thread number, if this function is not called,
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the max thread num is defined by CLUSTER_MAX_THREAD_NUM */
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void
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wasm_cluster_set_max_thread_num(uint32 num)
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{
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if (num > 0)
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cluster_max_thread_num = num;
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}
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bool
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thread_manager_init()
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{
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if (bh_list_init(cluster_list) != 0)
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return false;
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if (os_mutex_init(&cluster_list_lock) != 0)
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return false;
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return true;
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}
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void
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thread_manager_destroy()
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{
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WASMCluster *cluster = bh_list_first_elem(cluster_list);
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WASMCluster *next;
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while (cluster) {
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next = bh_list_elem_next(cluster);
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wasm_cluster_destroy(cluster);
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cluster = next;
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}
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wasm_cluster_cancel_all_callbacks();
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os_mutex_destroy(&cluster_list_lock);
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}
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static void
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traverse_list(bh_list *l, list_visitor visitor, void *user_data)
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{
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void *next, *node = bh_list_first_elem(l);
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while (node) {
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next = bh_list_elem_next(node);
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visitor(node, user_data);
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node = next;
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}
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}
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static bool
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allocate_aux_stack(WASMCluster *cluster, uint32 *start, uint32 *size)
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{
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uint32 i;
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/* If the module doesn't have aux stack info,
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it can't create any threads */
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if (!cluster->stack_segment_occupied)
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return false;
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os_mutex_lock(&cluster->lock);
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for (i = 0; i < cluster_max_thread_num; i++) {
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if (!cluster->stack_segment_occupied[i]) {
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if (start)
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*start = cluster->stack_tops[i];
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if (size)
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*size = cluster->stack_size;
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cluster->stack_segment_occupied[i] = true;
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os_mutex_unlock(&cluster->lock);
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return true;
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}
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}
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os_mutex_unlock(&cluster->lock);
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return false;
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}
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static bool
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free_aux_stack(WASMCluster *cluster, uint32 start)
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{
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uint32 i;
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for (i = 0; i < cluster_max_thread_num; i++) {
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if (start == cluster->stack_tops[i]) {
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os_mutex_lock(&cluster->lock);
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cluster->stack_segment_occupied[i] = false;
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os_mutex_unlock(&cluster->lock);
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return true;
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}
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}
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return false;
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}
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WASMCluster *
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wasm_cluster_create(WASMExecEnv *exec_env)
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{
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WASMCluster *cluster;
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uint64 total_size;
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uint32 aux_stack_start, aux_stack_size, i;
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bh_assert(exec_env->cluster == NULL);
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if (!(cluster = wasm_runtime_malloc(sizeof(WASMCluster)))) {
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LOG_ERROR("thread manager error: failed to allocate memory");
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return NULL;
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}
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memset(cluster, 0, sizeof(WASMCluster));
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exec_env->cluster = cluster;
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bh_list_init(&cluster->exec_env_list);
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bh_list_insert(&cluster->exec_env_list, exec_env);
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if (os_mutex_init(&cluster->lock) != 0) {
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wasm_runtime_free(cluster);
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LOG_ERROR("thread manager error: failed to init mutex");
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return NULL;
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}
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/* Prepare the aux stack top and size for every thread */
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if (!wasm_exec_env_get_aux_stack(exec_env,
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&aux_stack_start,
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&aux_stack_size)) {
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LOG_VERBOSE("No aux stack info for this module, can't create thread");
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/* If the module don't have aux stack info, don't throw error here,
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but remain stack_tops and stack_segment_occupied as NULL */
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os_mutex_lock(&cluster_list_lock);
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if (bh_list_insert(cluster_list, cluster) != 0) {
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os_mutex_unlock(&cluster_list_lock);
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goto fail;
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}
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os_mutex_unlock(&cluster_list_lock);
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return cluster;
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}
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cluster->stack_size = aux_stack_size / (cluster_max_thread_num + 1);
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if (cluster->stack_size == 0) {
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goto fail;
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}
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/* Set initial aux stack top to the instance and
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aux stack boundary to the main exec_env */
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if (!wasm_exec_env_set_aux_stack(exec_env, aux_stack_start,
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cluster->stack_size))
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goto fail;
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if (cluster_max_thread_num != 0) {
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total_size = cluster_max_thread_num * sizeof(uint32);
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if (total_size >= UINT32_MAX
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|| !(cluster->stack_tops =
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wasm_runtime_malloc((uint32)total_size))) {
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goto fail;
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}
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memset(cluster->stack_tops, 0, (uint32)total_size);
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if (!(cluster->stack_segment_occupied =
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wasm_runtime_malloc(cluster_max_thread_num * sizeof(bool)))) {
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goto fail;
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}
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memset(cluster->stack_segment_occupied, 0,
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cluster_max_thread_num * sizeof(bool));
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/* Reserve space for main instance */
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aux_stack_start -= cluster->stack_size;
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for (i = 0; i < cluster_max_thread_num; i++) {
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cluster->stack_tops[i] = aux_stack_start - cluster->stack_size * i;
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}
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}
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os_mutex_lock(&cluster_list_lock);
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if (bh_list_insert(cluster_list, cluster) != 0) {
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os_mutex_unlock(&cluster_list_lock);
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goto fail;
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}
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os_mutex_unlock(&cluster_list_lock);
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return cluster;
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fail:
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if (cluster)
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wasm_cluster_destroy(cluster);
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return NULL;
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}
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static void
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destroy_cluster_visitor(void *node, void *user_data)
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{
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DestroyCallBackNode *destroy_node = (DestroyCallBackNode *)node;
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WASMCluster *cluster = (WASMCluster *)user_data;
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destroy_node->destroy_cb(cluster);
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}
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void
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wasm_cluster_destroy(WASMCluster *cluster)
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{
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traverse_list(destroy_callback_list,
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destroy_cluster_visitor, (void *)cluster);
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/* Remove the cluster from the cluster list */
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os_mutex_lock(&cluster_list_lock);
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bh_list_remove(cluster_list, cluster);
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os_mutex_unlock(&cluster_list_lock);
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os_mutex_destroy(&cluster->lock);
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if (cluster->stack_tops)
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wasm_runtime_free(cluster->stack_tops);
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if (cluster->stack_segment_occupied)
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wasm_runtime_free(cluster->stack_segment_occupied);
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wasm_runtime_free(cluster);
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}
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static void
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free_node_visitor(void *node, void *user_data)
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{
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wasm_runtime_free(node);
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}
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void
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wasm_cluster_cancel_all_callbacks()
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{
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traverse_list(destroy_callback_list, free_node_visitor, NULL);
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}
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WASMCluster *
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wasm_exec_env_get_cluster(WASMExecEnv *exec_env)
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{
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return exec_env->cluster;
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}
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bool
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wasm_cluster_add_exec_env(WASMCluster *cluster, WASMExecEnv *exec_env)
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{
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bool ret = true;
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exec_env->cluster = cluster;
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os_mutex_lock(&cluster->lock);
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if (bh_list_insert(&cluster->exec_env_list, exec_env) != 0)
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ret = false;
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os_mutex_unlock(&cluster->lock);
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return ret;
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}
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bool
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wasm_cluster_del_exec_env(WASMCluster *cluster, WASMExecEnv *exec_env)
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{
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bool ret = true;
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bh_assert(exec_env->cluster == cluster);
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os_mutex_lock(&cluster->lock);
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if (bh_list_remove(&cluster->exec_env_list, exec_env) != 0)
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ret = false;
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os_mutex_unlock(&cluster->lock);
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if (cluster->exec_env_list.len == 0) {
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/* exec_env_list empty, destroy the cluster */
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wasm_cluster_destroy(cluster);
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}
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return ret;
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}
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WASMExecEnv *
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wasm_cluster_spawn_exec_env(WASMExecEnv *exec_env)
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{
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WASMCluster *cluster = wasm_exec_env_get_cluster(exec_env);
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wasm_module_t module = wasm_exec_env_get_module(exec_env);
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wasm_module_inst_t new_module_inst;
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WASMExecEnv *new_exec_env;
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uint32 aux_stack_start, aux_stack_size;
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if (!(new_module_inst =
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wasm_runtime_instantiate_internal(module, true, 8192,
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0, NULL, 0))) {
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return NULL;
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}
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new_exec_env = wasm_exec_env_create_internal(
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new_module_inst, exec_env->wasm_stack_size);
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if (!new_exec_env)
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goto fail1;
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if (!allocate_aux_stack(cluster, &aux_stack_start, &aux_stack_size)) {
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LOG_ERROR("thread manager error: "
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"failed to allocate aux stack space for new thread");
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goto fail2;
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}
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/* Set aux stack for current thread */
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if (!wasm_exec_env_set_aux_stack(new_exec_env, aux_stack_start,
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aux_stack_size)) {
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goto fail3;
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}
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if (!wasm_cluster_add_exec_env(cluster, new_exec_env))
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goto fail3;
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return new_exec_env;
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fail3:
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/* free the allocated aux stack space */
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free_aux_stack(cluster, aux_stack_start);
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fail2:
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wasm_exec_env_destroy(new_exec_env);
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fail1:
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wasm_runtime_deinstantiate_internal(new_module_inst, true);
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return NULL;
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}
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void
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wasm_cluster_destroy_spawned_exec_env(WASMExecEnv *exec_env)
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{
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WASMCluster *cluster = wasm_exec_env_get_cluster(exec_env);
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wasm_module_inst_t module_inst = wasm_runtime_get_module_inst(exec_env);
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bh_assert(cluster != NULL);
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/* Free aux stack space */
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free_aux_stack(cluster,
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exec_env->aux_stack_boundary + cluster->stack_size);
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wasm_cluster_del_exec_env(cluster, exec_env);
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wasm_exec_env_destroy_internal(exec_env);
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wasm_runtime_deinstantiate_internal(module_inst, true);
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}
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/* start routine of thread manager */
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static void*
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thread_manager_start_routine(void *arg)
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{
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void *ret;
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WASMExecEnv *exec_env = (WASMExecEnv *)arg;
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WASMCluster *cluster = wasm_exec_env_get_cluster(exec_env);
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bh_assert(cluster != NULL);
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exec_env->handle = os_self_thread();
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ret = exec_env->thread_start_routine(exec_env);
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#ifdef OS_ENABLE_HW_BOUND_CHECK
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if (exec_env->suspend_flags.flags & 0x08)
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ret = exec_env->thread_ret_value;
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#endif
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/* Routine exit */
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/* Free aux stack space */
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free_aux_stack(cluster,
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exec_env->aux_stack_boundary + cluster->stack_size);
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/* Detach the native thread here to ensure the resources are freed */
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wasm_cluster_detach_thread(exec_env);
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/* Remove and destroy exec_env */
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wasm_cluster_del_exec_env(cluster, exec_env);
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wasm_exec_env_destroy_internal(exec_env);
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os_thread_exit(ret);
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return ret;
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}
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int32
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wasm_cluster_create_thread(WASMExecEnv *exec_env,
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wasm_module_inst_t module_inst,
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void* (*thread_routine)(void *),
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void *arg)
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{
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WASMCluster *cluster;
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WASMExecEnv *new_exec_env;
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uint32 aux_stack_start, aux_stack_size;
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korp_tid tid;
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cluster = wasm_exec_env_get_cluster(exec_env);
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bh_assert(cluster);
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new_exec_env = wasm_exec_env_create_internal(
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module_inst, exec_env->wasm_stack_size);
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if (!new_exec_env)
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return -1;
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if (!allocate_aux_stack(cluster, &aux_stack_start, &aux_stack_size)) {
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LOG_ERROR("thread manager error: "
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"failed to allocate aux stack space for new thread");
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goto fail1;
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}
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/* Set aux stack for current thread */
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if (!wasm_exec_env_set_aux_stack(new_exec_env, aux_stack_start,
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aux_stack_size)) {
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goto fail2;
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}
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if (!wasm_cluster_add_exec_env(cluster, new_exec_env))
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goto fail2;
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new_exec_env->thread_start_routine = thread_routine;
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new_exec_env->thread_arg = arg;
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if (0 != os_thread_create(&tid, thread_manager_start_routine,
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(void *)new_exec_env,
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APP_THREAD_STACK_SIZE_DEFAULT)) {
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goto fail3;
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}
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return 0;
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fail3:
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wasm_cluster_del_exec_env(cluster, new_exec_env);
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fail2:
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/* free the allocated aux stack space */
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free_aux_stack(cluster, aux_stack_start);
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fail1:
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wasm_exec_env_destroy(new_exec_env);
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return -1;
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}
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int32
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wasm_cluster_join_thread(WASMExecEnv *exec_env, void **ret_val)
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{
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return os_thread_join(exec_env->handle, ret_val);
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}
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int32
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wasm_cluster_detach_thread(WASMExecEnv *exec_env)
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{
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return os_thread_detach(exec_env->handle);
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}
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void
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wasm_cluster_exit_thread(WASMExecEnv *exec_env, void *retval)
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{
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WASMCluster *cluster;
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#ifdef OS_ENABLE_HW_BOUND_CHECK
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if (exec_env->jmpbuf_stack_top) {
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WASMJmpBuf *jmpbuf_node;
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/* Store the return value in exec_env */
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exec_env->thread_ret_value = retval;
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exec_env->suspend_flags.flags |= 0x08;
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/* Free all jmpbuf_node except the last one */
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while (exec_env->jmpbuf_stack_top->prev) {
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jmpbuf_node = wasm_exec_env_pop_jmpbuf(exec_env);
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wasm_runtime_free(jmpbuf_node);
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}
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jmpbuf_node = exec_env->jmpbuf_stack_top;
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os_longjmp(jmpbuf_node->jmpbuf, 1);
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return;
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}
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#endif
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cluster = wasm_exec_env_get_cluster(exec_env);
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bh_assert(cluster);
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/* App exit the thread, free the resources before exit native thread */
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/* Free aux stack space */
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free_aux_stack(cluster,
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exec_env->aux_stack_boundary + cluster->stack_size);
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/* Detach the native thread here to ensure the resources are freed */
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wasm_cluster_detach_thread(exec_env);
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/* Remove and destroy exec_env */
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wasm_cluster_del_exec_env(cluster, exec_env);
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wasm_exec_env_destroy_internal(exec_env);
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os_thread_exit(retval);
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}
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int32
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wasm_cluster_cancel_thread(WASMExecEnv *exec_env)
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{
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/* Set the termination flag */
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exec_env->suspend_flags.flags |= 0x01;
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return 0;
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}
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static void
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terminate_thread_visitor(void *node, void *user_data)
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{
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WASMExecEnv *curr_exec_env = (WASMExecEnv *)node;
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WASMExecEnv *exec_env = (WASMExecEnv *)user_data;
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if (curr_exec_env == exec_env)
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return;
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wasm_cluster_cancel_thread(curr_exec_env);
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wasm_cluster_join_thread(curr_exec_env, NULL);
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}
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void
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wasm_cluster_terminate_all(WASMCluster *cluster)
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{
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traverse_list(&cluster->exec_env_list,
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terminate_thread_visitor, NULL);
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}
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void
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wasm_cluster_terminate_all_except_self(WASMCluster *cluster,
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WASMExecEnv *exec_env)
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{
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traverse_list(&cluster->exec_env_list,
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terminate_thread_visitor, (void *)exec_env);
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}
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bool
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wasm_cluster_register_destroy_callback(void (*callback)(WASMCluster *))
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{
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DestroyCallBackNode *node;
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if (!(node = wasm_runtime_malloc(sizeof(DestroyCallBackNode)))) {
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LOG_ERROR("thread manager error: failed to allocate memory");
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return false;
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}
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node->destroy_cb = callback;
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bh_list_insert(destroy_callback_list, node);
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return true;
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}
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void
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wasm_cluster_suspend_thread(WASMExecEnv *exec_env)
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{
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/* Set the suspend flag */
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|
exec_env->suspend_flags.flags |= 0x02;
|
|
}
|
|
|
|
static void
|
|
suspend_thread_visitor(void *node, void *user_data)
|
|
{
|
|
WASMExecEnv *curr_exec_env = (WASMExecEnv *)node;
|
|
WASMExecEnv *exec_env = (WASMExecEnv *)user_data;
|
|
|
|
if (curr_exec_env == exec_env)
|
|
return;
|
|
|
|
wasm_cluster_suspend_thread(curr_exec_env);
|
|
}
|
|
|
|
void
|
|
wasm_cluster_suspend_all(WASMCluster *cluster)
|
|
{
|
|
traverse_list(&cluster->exec_env_list,
|
|
suspend_thread_visitor, NULL);
|
|
}
|
|
|
|
void
|
|
wasm_cluster_suspend_all_except_self(WASMCluster *cluster,
|
|
WASMExecEnv *exec_env)
|
|
{
|
|
traverse_list(&cluster->exec_env_list,
|
|
suspend_thread_visitor, (void *)exec_env);
|
|
}
|
|
|
|
void
|
|
wasm_cluster_resume_thread(WASMExecEnv *exec_env)
|
|
{
|
|
exec_env->suspend_flags.flags &= ~0x02;
|
|
}
|
|
|
|
static void
|
|
resume_thread_visitor(void *node, void *user_data)
|
|
{
|
|
WASMExecEnv *curr_exec_env = (WASMExecEnv *)node;
|
|
|
|
wasm_cluster_resume_thread(curr_exec_env);
|
|
}
|
|
|
|
void
|
|
wasm_cluster_resume_all(WASMCluster *cluster)
|
|
{
|
|
traverse_list(&cluster->exec_env_list, resume_thread_visitor, NULL);
|
|
}
|
|
|
|
static void
|
|
set_exception_visitor(void *node, void *user_data)
|
|
{
|
|
WASMExecEnv *curr_exec_env = (WASMExecEnv *)node;
|
|
WASMExecEnv *exec_env = (WASMExecEnv *)user_data;
|
|
WASMModuleInstanceCommon *module_inst = get_module_inst(exec_env);
|
|
WASMModuleInstanceCommon *curr_module_inst =
|
|
get_module_inst(curr_exec_env);
|
|
const char *exception = wasm_runtime_get_exception(module_inst);
|
|
/* skip "Exception: " */
|
|
exception += 11;
|
|
|
|
if (curr_exec_env != exec_env) {
|
|
curr_module_inst = get_module_inst(curr_exec_env);
|
|
wasm_runtime_set_exception(curr_module_inst, exception);
|
|
}
|
|
}
|
|
|
|
void
|
|
wasm_cluster_spread_exception(WASMExecEnv *exec_env)
|
|
{
|
|
WASMCluster *cluster = wasm_exec_env_get_cluster(exec_env);
|
|
|
|
traverse_list(&cluster->exec_env_list, set_exception_visitor, exec_env);
|
|
}
|