Fix app heap corrupted unchecked issue (#788)

Check whether app heap is corrupted in gc_migrate() and gci_dump(),
and handle the failures in wasm/aot_enlarge_memory().

core/iwasm/common/wasm_runtime_common.c

@@ -4211,3 +4211,14 @@ fail:
         wasm_runtime_free(results);
     return ret;
 }
+
+void
+wasm_runtime_show_app_heap_corrupted_prompt()
+{
+    LOG_ERROR("Error: app heap is corrupted, if the wasm file "
+              "is compiled by wasi-sdk-12.0 or higher version, "
+              "please add -Wl,--export=malloc -Wl,--export=free "
+              "to export malloc and free functions. If it is "
+              "compiled by asc, please add --exportRuntime to "
+              "export the runtime helpers.");
+}

core/iwasm/common/wasm_runtime_common.h

@@ -839,6 +839,9 @@ wasm_runtime_invoke_c_api_native(WASMModuleInstanceCommon *module_inst,
                                  uint32 argc, uint32 *argv, bool with_env,
                                  void *wasm_c_api_env);
 
+void
+wasm_runtime_show_app_heap_corrupted_prompt();
+
 #ifdef __cplusplus
 }
 #endif