initialize WASI stdio handles to invalid for better error handling

Author: lum1n0us

core/iwasm/aot/aot_loader.c

@@ -4120,6 +4120,16 @@ create_module(char *name, char *error_buf, uint32 error_buf_size)
     }
 #endif
 
+#if WASM_ENABLE_LIBC_WASI != 0
+    /*
+     * learned from all implementations of `os_get_invalid_handle()`
+     * that invalid handles across all platforms are represented by -1.
+     */
+    module->wasi_args.stdio[0] = -1;
+    module->wasi_args.stdio[1] = -1;
+    module->wasi_args.stdio[2] = -1;
+#endif
+
     return module;
 #if WASM_ENABLE_GC != 0
 fail2:

core/iwasm/interpreter/wasm_loader.c

@@ -6368,6 +6368,16 @@ create_module(char *name, char *error_buf, uint32 error_buf_size)
     }
 #endif
 
+#if WASM_ENABLE_LIBC_WASI != 0
+    /*
+     * learned from all implementations of `os_get_invalid_handle()`
+     * that invalid handles across all platforms are represented by -1.
+     */
+    module->wasi_args.stdio[0] = -1;
+    module->wasi_args.stdio[1] = -1;
+    module->wasi_args.stdio[2] = -1;
+#endif
+
     (void)ret;
     return module;