fix memory leak bug

runtime/include/sandbox_set_as_returned.h

@@ -51,7 +51,7 @@ sandbox_set_as_returned(struct sandbox *sandbox, sandbox_state_t last_state)
 	sandbox_state_totals_increment(SANDBOX_RETURNED);
 	sandbox_state_totals_decrement(last_state);
 
-	http_session_set_response_header(sandbox->http, 200);
+	//http_session_set_response_header(sandbox->http, 200);
 	sandbox->http->state = HTTP_SESSION_EXECUTION_COMPLETE;
 	//http_session_send_response(sandbox->http, (void_star_cb)listener_thread_register_http_session);
 	sandbox->http = NULL;

runtime/include/sandbox_types.h

@@ -46,6 +46,8 @@ struct sandbox {
 
 	/* HTTP State */
 	struct http_session *http;
+	struct auto_buf response_body;
+	struct auto_buf response_header;
 
 	/* WebAssembly Module State */
 	struct module *module; /* the module this is an instance of */

runtime/src/libc/wasi_impl_serverless.c

@@ -796,7 +796,8 @@ wasi_snapshot_preview1_backing_fd_write(wasi_context_t *context, __wasi_fd_t fd,
 				debuglog("STDERR from Sandbox: %.*s", iovs[i].buf_len, iovs[i].buf);
 			}
 #endif
-			rc = fwrite(iovs[i].buf, 1, iovs[i].buf_len, s->http->response_body.handle);
+			//rc = fwrite(iovs[i].buf, 1, iovs[i].buf_len, s->http->response_body.handle);
+			rc = fwrite(iovs[i].buf, 1, iovs[i].buf_len, s->response_body.handle);
 			if (rc != iovs[i].buf_len) return __WASI_ERRNO_FBIG;
 
 			nwritten += rc;

runtime/src/sandbox.c

@@ -80,6 +80,19 @@ sandbox_free_stack(struct sandbox *sandbox)
 	return module_free_stack(sandbox->module, sandbox->stack);
 }
 
+int
+init_response_body(struct sandbox *sandbox)
+{
+        if (sandbox->response_body.data == NULL) {
+                int rc = auto_buf_init(&sandbox->response_body);
+                if (rc < 0) {
+                        printf("failed to init http body autobuf, exit\n");
+                        exit(-1);
+                }
+        }
+
+        return 0;
+}
 /**
  * Allocates HTTP buffers and performs our approximation of "WebAssembly instantiation"
  * @param sandbox
@@ -94,7 +107,8 @@ sandbox_prepare_execution_environment(struct sandbox *sandbox)
 
 	int rc;
 
-	rc = http_session_init_response_body(sandbox->http);
+	//rc = http_session_init_response_body(sandbox->http);
+	rc = init_response_body(sandbox);
 	if (rc < 0) {
 		error_message = "failed to allocate response body";
 		goto err_globals_allocation_failed;
@@ -135,6 +149,13 @@ err_http_allocation_failed:
 	goto done;
 }
 
+
+void
+deinit_response_body(struct sandbox *sandbox)
+{
+        auto_buf_deinit(&sandbox->response_body);
+}
+
 void
 sandbox_init(struct sandbox *sandbox, struct module *module, struct http_session *session, struct route *route,
              struct tenant *tenant, uint64_t admissions_estimate)
@@ -211,6 +232,8 @@ sandbox_deinit(struct sandbox *sandbox)
 	/* Linear Memory and Guard Page should already have been munmaped and set to NULL */
 	assert(sandbox->memory == NULL);
 
+	deinit_response_body(sandbox);
+
 	if (likely(sandbox->stack != NULL)) sandbox_free_stack(sandbox);
 	if (likely(sandbox->globals.buffer != NULL)) sandbox_free_globals(sandbox);
 	if (likely(sandbox->wasi_context != NULL)) wasi_context_destroy(sandbox->wasi_context);