cli: automatically create shared memories matching imports

this seems required by wasi-threads.

Author: yamt

cli/main.c

@@ -240,10 +240,10 @@ main(int argc, char *const *argv)
         }
 #if defined(TOYWASM_ENABLE_WASI_THREADS)
         if (state->wasi_threads != NULL) {
+                const struct repl_module_state *mod =
+                        &state->modules[state->nmodules - 1];
                 ret = wasi_threads_instance_set_thread_spawn_args(
-                        state->wasi_threads,
-                        state->modules[state->nmodules - 1].module,
-                        state->imports);
+                        state->wasi_threads, mod->module, mod->extra_import);
                 if (ret != 0) {
                         xlog_error("wasi_threads_instance_set_thread_spawn_"
                                    "args failed with %d",

cli/repl.c

@@ -141,6 +141,12 @@ repl_unload(struct repl_module_state *mod)
                 free(mod->name);
                 mod->name = NULL;
         }
+#if defined(TOYWASM_ENABLE_WASI_THREADS)
+        if (mod->extra_import != NULL) {
+                import_object_destroy(mod->extra_import);
+                mod->extra_import = NULL;
+        }
+#endif
 }
 
 void
@@ -386,10 +392,24 @@ repl_load_from_buf(struct repl_state *state, const char *modname,
                 xlog_printf("module_load failed\n");
                 goto fail;
         }
+
+        struct import_object *imports = state->imports;
+#if defined(TOYWASM_ENABLE_WASI_THREADS)
+        /* create matching shared memory automatically */
+        struct import_object *imo;
+        ret = create_satisfying_shared_memories(mod->module, &imo);
+        if (ret != 0) {
+                goto fail;
+        }
+        mod->extra_import = imo;
+        imo->next = imports;
+        imports = imo;
+#endif
+
         struct report report;
         report_init(&report);
-        ret = instance_create_no_init(mod->module, &mod->inst, NULL,
-                                      state->imports, &report);
+        ret = instance_create_no_init(mod->module, &mod->inst, NULL, imports,
+                                      &report);
         if (report.msg != NULL) {
                 xlog_error("instance_create: %s", report.msg);
                 printf("instantiation error: %s\n", report.msg);

cli/repl.h

@@ -17,6 +17,9 @@ struct repl_module_state {
         bool buf_mapped;
         struct module *module;
         struct instance *inst;
+#if defined(TOYWASM_ENABLE_WASI_THREADS)
+        struct import_object *extra_import;
+#endif
 };
 
 /* eg. const.wast has 366 modules */