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Fix issues reported by Coverity (#2053)

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Fix the potential dead lock issue reported by Coverity code analysis tool.
This commit is contained in:
Wenyong Huang 2023-03-24 14:05:17 +08:00 committed by GitHub
parent 3977f0b22a
commit c7cdb78394
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 24 additions and 10 deletions
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1
core/iwasm/common/wasm_shared_memory.c
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@ -253,6 +253,7 @@ acquire_wait_info(void *address, AtomicWaitNode *wait_node)
wait_info->wait_list = &wait_info->wait_list_head;
ret = bh_list_init(wait_info->wait_list);
bh_assert(ret == BH_LIST_SUCCESS);
(void)ret;
if (!bh_hash_map_insert(wait_map, address, (void *)wait_info)) {
wasm_runtime_free(wait_info);

33
core/iwasm/libraries/thread-mgr/thread_manager.c
View File

@ -382,9 +382,9 @@ wasm_cluster_add_exec_env(WASMCluster *cluster, WASMExecEnv *exec_env)
return ret;
}
/* The caller should lock cluster->lock for thread safety */
bool
wasm_cluster_del_exec_env(WASMCluster *cluster, WASMExecEnv *exec_env)
static bool
wasm_cluster_del_exec_env_internal(WASMCluster *cluster, WASMExecEnv *exec_env,
bool can_destroy_cluster)
{
bool ret = true;
bh_assert(exec_env->cluster == cluster);
@ -407,13 +407,26 @@ wasm_cluster_del_exec_env(WASMCluster *cluster, WASMExecEnv *exec_env)
if (bh_list_remove(&cluster->exec_env_list, exec_env) != 0)
ret = false;
if (cluster->exec_env_list.len == 0) {
/* exec_env_list empty, destroy the cluster */
wasm_cluster_destroy(cluster);
if (can_destroy_cluster) {
if (cluster->exec_env_list.len == 0) {
/* exec_env_list empty, destroy the cluster */
wasm_cluster_destroy(cluster);
}
}
else {
/* Don't destroy cluster as cluster->lock is being used */
}
return ret;
}
/* The caller should lock cluster->lock for thread safety */
bool
wasm_cluster_del_exec_env(WASMCluster *cluster, WASMExecEnv *exec_env)
{
return wasm_cluster_del_exec_env_internal(cluster, exec_env, true);
}
static WASMExecEnv *
wasm_cluster_search_exec_env(WASMCluster *cluster,
WASMModuleInstanceCommon *module_inst)
@ -561,7 +574,7 @@ wasm_cluster_destroy_spawned_exec_env(WASMExecEnv *exec_env)
/* Free aux stack space */
free_aux_stack(exec_env, exec_env->aux_stack_bottom.bottom);
/* Remove exec_env */
wasm_cluster_del_exec_env(cluster, exec_env);
wasm_cluster_del_exec_env_internal(cluster, exec_env, false);
/* Destroy exec_env */
wasm_exec_env_destroy_internal(exec_env);
/* Routine exit, destroy instance */
@ -621,7 +634,7 @@ thread_manager_start_routine(void *arg)
/* Free aux stack space */
free_aux_stack(exec_env, exec_env->aux_stack_bottom.bottom);
/* Remove exec_env */
wasm_cluster_del_exec_env(cluster, exec_env);
wasm_cluster_del_exec_env_internal(cluster, exec_env, false);
/* Destroy exec_env */
wasm_exec_env_destroy_internal(exec_env);
/* Routine exit, destroy instance */
@ -707,7 +720,7 @@ wasm_cluster_create_thread(WASMExecEnv *exec_env,
return 0;
fail4:
wasm_cluster_del_exec_env(cluster, new_exec_env);
wasm_cluster_del_exec_env_internal(cluster, new_exec_env, false);
fail3:
/* free the allocated aux stack space */
if (alloc_aux_stack)
@ -972,7 +985,7 @@ wasm_cluster_exit_thread(WASMExecEnv *exec_env, void *retval)
/* Free aux stack space */
free_aux_stack(exec_env, exec_env->aux_stack_bottom.bottom);
/* Remove exec_env */
wasm_cluster_del_exec_env(cluster, exec_env);
wasm_cluster_del_exec_env_internal(cluster, exec_env, false);
/* Destroy exec_env */
wasm_exec_env_destroy_internal(exec_env);
/* Routine exit, destroy instance */