Class: Quickjs::VM

Inherits:
Object
  • Object
show all
Defined in:
ext/quickjsrb/quickjsrb.c

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Object 



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# File 'ext/quickjsrb/quickjsrb.c', line 700

static VALUE vm_m_initialize(int argc, VALUE *argv, VALUE r_self)
{
  VALUE r_opts;
  rb_scan_args(argc, argv, ":", &r_opts);
  if (NIL_P(r_opts))
    r_opts = rb_hash_new();

  VALUE r_memory_limit = rb_hash_aref(r_opts, ID2SYM(rb_intern("memory_limit")));
  if (NIL_P(r_memory_limit))
    r_memory_limit = UINT2NUM(1024 * 1024 * 128);
  VALUE r_max_stack_size = rb_hash_aref(r_opts, ID2SYM(rb_intern("max_stack_size")));
  if (NIL_P(r_max_stack_size))
    r_max_stack_size = UINT2NUM(1024 * 1024 * 4);
  VALUE r_features = rb_hash_aref(r_opts, ID2SYM(rb_intern("features")));
  if (NIL_P(r_features))
    r_features = rb_ary_new();
  VALUE r_timeout_msec = rb_hash_aref(r_opts, ID2SYM(rb_intern("timeout_msec")));
  if (NIL_P(r_timeout_msec))
    r_timeout_msec = UINT2NUM(100);

  VMData *data;
  TypedData_Get_Struct(r_self, VMData, &vm_type, data);

  data->eval_time->limit_ms = (int64_t)NUM2UINT(r_timeout_msec);
  JS_SetContextOpaque(data->context, data);
  JSRuntime *runtime = JS_GetRuntime(data->context);

  JS_SetMemoryLimit(runtime, NUM2UINT(r_memory_limit));
  JS_SetMaxStackSize(runtime, NUM2UINT(r_max_stack_size));

  JS_SetModuleLoaderFunc2(runtime, NULL, js_module_loader, js_module_check_attributes, NULL);
  js_std_init_handlers(runtime);

  JSValue j_global = JS_GetGlobalObject(data->context);

  if (RTEST(rb_funcall(r_features, rb_intern("include?"), 1, QUICKJSRB_SYM(featureStdId))))
  {
    js_init_module_std(data->context, "std");
    const char *enableStd = "import * as std from 'std';\n"
                            "globalThis.std = std;\n";
    JSValue j_stdEval = JS_Eval(data->context, enableStd, strlen(enableStd), "<vm>", JS_EVAL_TYPE_MODULE);
    JS_FreeValue(data->context, j_stdEval);
  }

  if (RTEST(rb_funcall(r_features, rb_intern("include?"), 1, QUICKJSRB_SYM(featureOsId))))
  {
    js_init_module_os(data->context, "os");
    const char *enableOs = "import * as os from 'os';\n"
                           "globalThis.os = os;\n";
    JSValue j_osEval = JS_Eval(data->context, enableOs, strlen(enableOs), "<vm>", JS_EVAL_TYPE_MODULE);
    JS_FreeValue(data->context, j_osEval);
  }
  else if (RTEST(rb_funcall(r_features, rb_intern("include?"), 1, QUICKJSRB_SYM(featureTimeoutId))))
  {
    JS_SetPropertyStr(
        data->context, j_global, "setTimeout",
        JS_NewCFunction(data->context, js_quickjsrb_set_timeout, "setTimeout", 2));
  }

  if (RTEST(rb_funcall(r_features, rb_intern("include?"), 1, QUICKJSRB_SYM(featurePolyfillIntlId))))
  {
    const char *defineIntl = "Object.defineProperty(globalThis, 'Intl', { value:{} });\n";
    JSValue j_defineIntl = JS_Eval(data->context, defineIntl, strlen(defineIntl), "<vm>", JS_EVAL_TYPE_GLOBAL);
    JS_FreeValue(data->context, j_defineIntl);

    JSValue j_polyfillIntlObject = JS_ReadObject(data->context, &qjsc_polyfill_intl_en_min, qjsc_polyfill_intl_en_min_size, JS_READ_OBJ_BYTECODE);
    JSValue j_polyfillIntlResult = JS_EvalFunction(data->context, j_polyfillIntlObject); // Frees polyfillIntlObject
    JS_FreeValue(data->context, j_polyfillIntlResult);
  }

  if (RTEST(rb_funcall(r_features, rb_intern("include?"), 1, QUICKJSRB_SYM(featurePolyfillFileId))))
  {
    JSValue j_polyfillFileObject = JS_ReadObject(data->context, &qjsc_polyfill_file_min, qjsc_polyfill_file_min_size, JS_READ_OBJ_BYTECODE);
    JSValue j_polyfillFileResult = JS_EvalFunction(data->context, j_polyfillFileObject);
    JS_FreeValue(data->context, j_polyfillFileResult);

    quickjsrb_init_file_proxy(data);
  }

  if (RTEST(rb_funcall(r_features, rb_intern("include?"), 1, QUICKJSRB_SYM(featurePolyfillEncodingId))))
  {
    JSValue j_polyfillEncodingObject = JS_ReadObject(data->context, &qjsc_polyfill_encoding_min, qjsc_polyfill_encoding_min_size, JS_READ_OBJ_BYTECODE);
    JSValue j_polyfillEncodingResult = JS_EvalFunction(data->context, j_polyfillEncodingObject);
    JS_FreeValue(data->context, j_polyfillEncodingResult);
  }

  if (RTEST(rb_funcall(r_features, rb_intern("include?"), 1, QUICKJSRB_SYM(featurePolyfillUrlId))))
  {
    JSValue j_polyfillUrlObject = JS_ReadObject(data->context, &qjsc_polyfill_url_min, qjsc_polyfill_url_min_size, JS_READ_OBJ_BYTECODE);
    JSValue j_polyfillUrlResult = JS_EvalFunction(data->context, j_polyfillUrlObject);
    JS_FreeValue(data->context, j_polyfillUrlResult);
  }

  if (RTEST(rb_funcall(r_features, rb_intern("include?"), 1, QUICKJSRB_SYM(featurePolyfillCryptoId))))
  {
    quickjsrb_init_crypto(data->context, j_global);
  }

  JSValue j_console = JS_NewObject(data->context);
  JS_SetPropertyStr(
      data->context, j_console, "log",
      JS_NewCFunction(data->context, js_console_info, "log", 1));
  JS_SetPropertyStr(
      data->context, j_console, "debug",
      JS_NewCFunction(data->context, js_console_verbose, "debug", 1));
  JS_SetPropertyStr(
      data->context, j_console, "info",
      JS_NewCFunction(data->context, js_console_info, "info", 1));
  JS_SetPropertyStr(
      data->context, j_console, "warn",
      JS_NewCFunction(data->context, js_console_warn, "warn", 1));
  JS_SetPropertyStr(
      data->context, j_console, "error",
      JS_NewCFunction(data->context, js_console_error, "error", 1));

  JS_SetPropertyStr(data->context, j_global, "console", j_console);
  JS_FreeValue(data->context, j_global);

  return r_self;
}

Instance Method Details

#call(*args) ⇒ Object 



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# File 'ext/quickjsrb/quickjsrb.c', line 991

static VALUE vm_m_callGlobalFunction(int argc, VALUE *argv, VALUE r_self)
{
  if (argc < 1)
    rb_raise(rb_eArgError, "wrong number of arguments (given 0, expected 1+)");

  VALUE r_name = argv[0];

  VMData *data;
  TypedData_Get_Struct(r_self, VMData, &vm_type, data);

  JSValue j_this = JS_UNDEFINED;
  JSValue j_func;

  VALUE r_path;
  if (SYMBOL_P(r_name) || RB_TYPE_P(r_name, T_STRING))
  {
    VALUE r_name_str = rb_funcall(r_name, rb_intern("to_s"), 0);
    const char *name_str = StringValueCStr(r_name_str);
    size_t name_len = strlen(name_str);
    const char *last_bracket = strrchr(name_str, '[');
    const char *last_dot = strrchr(name_str, '.');

    if (last_bracket != NULL && last_bracket != name_str && name_str[name_len - 1] == ']')
    {
      // Bracket notation: 'a["key"]' or 'a.b["key"]' or 'a[0]'
      // Split into parent expression and the bracketed key
      VALUE r_parent = rb_str_new(name_str, last_bracket - name_str);
      const char *key_start = last_bracket + 1;
      size_t key_len = name_len - (key_start - name_str) - 1; // exclude ']'
      // Strip surrounding quotes for string keys: 'a["b"]' → key = b
      if (key_len >= 2 &&
          ((key_start[0] == '\'' && key_start[key_len - 1] == '\'') ||
           (key_start[0] == '"' && key_start[key_len - 1] == '"')))
      {
        key_start++;
        key_len -= 2;
      }
      VALUE r_key = rb_str_new(key_start, key_len);
      r_path = rb_ary_new3(2, r_parent, r_key);
    }
    else if (last_dot != NULL && last_dot != name_str)
    {
      // Dot notation: 'a.b.c' → ['a.b', 'c'] so the parent becomes `this`
      VALUE r_parent = rb_str_new(name_str, last_dot - name_str);
      VALUE r_key = rb_str_new2(last_dot + 1);
      r_path = rb_ary_new3(2, r_parent, r_key);
    }
    else
    {
      r_path = rb_ary_new3(1, r_name_str);
    }
  }
  else
  {
    rb_raise(rb_eTypeError, "function's name should be a Symbol or a String");
  }

  {
    long path_len = RARRAY_LEN(r_path);

    VALUE r_first = RARRAY_AREF(r_path, 0);
    if (!(SYMBOL_P(r_first) || RB_TYPE_P(r_first, T_STRING)))
      rb_raise(rb_eTypeError, "function path elements should be Symbols or Strings");

    VALUE r_first_str = rb_funcall(r_first, rb_intern("to_s"), 0);
    const char *first_seg = StringValueCStr(r_first_str);

    // JS_Eval accesses both global object properties and lexical (const/let) bindings
    JSValue j_cur = JS_Eval(data->context, first_seg, strlen(first_seg), "<vm>", JS_EVAL_TYPE_GLOBAL);
    if (JS_IsException(j_cur))
      return to_rb_value(data->context, j_cur); // raises

    for (long i = 1; i < path_len; i++)
    {
      VALUE r_seg = RARRAY_AREF(r_path, i);
      if (!(SYMBOL_P(r_seg) || RB_TYPE_P(r_seg, T_STRING)))
      {
        JS_FreeValue(data->context, j_cur);
        JS_FreeValue(data->context, j_this);
        rb_raise(rb_eTypeError, "function path elements should be Symbols or Strings");
      }
      VALUE r_seg_str = rb_funcall(r_seg, rb_intern("to_s"), 0);
      const char *seg = StringValueCStr(r_seg_str);

      JSValue j_next = JS_GetPropertyStr(data->context, j_cur, seg);
      if (JS_IsException(j_next))
      {
        JS_FreeValue(data->context, j_cur);
        JS_FreeValue(data->context, j_this);
        return to_rb_value(data->context, j_next); // raises
      }

      JS_FreeValue(data->context, j_this);
      j_this = j_cur;
      j_cur = j_next;
    }

    j_func = j_cur;
  }

  if (!JS_IsFunction(data->context, j_func))
  {
    JS_FreeValue(data->context, j_func);
    JS_FreeValue(data->context, j_this);
    VALUE r_error_message = rb_str_new2("given path is not a function");
    rb_exc_raise(rb_funcall(QUICKJSRB_ERROR_FOR(QUICKJSRB_ROOT_RUNTIME_ERROR), rb_intern("new"), 2, r_error_message, Qnil));
    return Qnil;
  }

  int nargs = argc - 1;
  JSValue *j_args = NULL;
  if (nargs > 0)
  {
    j_args = (JSValue *)malloc(sizeof(JSValue) * nargs);
    for (int i = 0; i < nargs; i++)
      j_args[i] = to_js_value(data->context, argv[i + 1]);
  }

  clock_gettime(CLOCK_MONOTONIC, &data->eval_time->started_at);
  JS_SetInterruptHandler(JS_GetRuntime(data->context), interrupt_handler, data->eval_time);

  JSValue j_result = JS_Call(data->context, j_func, j_this, nargs, (JSValueConst *)j_args);

  JS_FreeValue(data->context, j_func);
  JS_FreeValue(data->context, j_this);
  if (j_args)
  {
    for (int i = 0; i < nargs; i++)
      JS_FreeValue(data->context, j_args[i]);
    free(j_args);
  }

  // js_std_await handles both async (promise) and sync results; frees j_result
  return to_rb_return_value(data->context, js_std_await(data->context, j_result));
}

#define_function(*args) ⇒ Object 



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# File 'ext/quickjsrb/quickjsrb.c', line 869

static VALUE vm_m_defineGlobalFunction(int argc, VALUE *argv, VALUE r_self)
{
  rb_need_block();

  VALUE r_name;
  VALUE r_flags;
  VALUE r_block;
  rb_scan_args(argc, argv, "10*&", &r_name, &r_flags, &r_block);

  VMData *data;
  TypedData_Get_Struct(r_self, VMData, &vm_type, data);

  if (RB_TYPE_P(r_name, T_ARRAY))
  {
    long path_len = RARRAY_LEN(r_name);
    if (path_len < 1)
      rb_raise(rb_eArgError, "function's path array must not be empty");

    for (long i = 0; i < path_len; i++)
    {
      VALUE r_seg = RARRAY_AREF(r_name, i);
      if (!(SYMBOL_P(r_seg) || RB_TYPE_P(r_seg, T_STRING)))
        rb_raise(rb_eTypeError, "function's name should be a Symbol or a String");
    }

    // Build internal lookup key by joining path segments with "."
    // e.g. ["myLib", "hello"] -> :"myLib.hello"
    VALUE r_segs = rb_ary_new();
    for (long i = 0; i < path_len; i++)
      rb_ary_push(r_segs, rb_funcall(RARRAY_AREF(r_name, i), rb_intern("to_s"), 0));
    VALUE r_key_str = rb_funcall(r_segs, rb_intern("join"), 1, rb_str_new2("."));
    VALUE r_key_sym = rb_funcall(r_key_str, rb_intern("to_sym"), 0);
    rb_hash_aset(data->defined_functions, r_key_sym, r_block);

    VALUE r_func_seg_str = rb_funcall(RARRAY_AREF(r_name, path_len - 1), rb_intern("to_s"), 0);
    char *funcName = StringValueCStr(r_func_seg_str);

    JSValueConst ruby_data[2];
    ruby_data[0] = JS_NewString(data->context, StringValueCStr(r_key_str));
    ruby_data[1] = JS_NewBool(data->context, RTEST(rb_funcall(r_flags, rb_intern("include?"), 1, ID2SYM(rb_intern("async")))));

    // Resolve the parent object to attach the function to.
    // For a single-element array, parent is the global object.
    // For multi-element arrays, traverse path[0..n-2] using JS_Eval for the first
    // segment (so lexical const/let bindings are resolved, not just global properties)
    // and JS_GetPropertyStr for subsequent segments.
    JSValue j_parent;
    if (path_len == 1)
    {
      j_parent = JS_GetGlobalObject(data->context);
    }
    else
    {
      VALUE r_first_str = rb_funcall(RARRAY_AREF(r_name, 0), rb_intern("to_s"), 0);
      const char *first_seg = StringValueCStr(r_first_str);
      j_parent = JS_Eval(data->context, first_seg, strlen(first_seg), "<vm>", JS_EVAL_TYPE_GLOBAL);

      if (JS_IsException(j_parent) || !JS_IsObject(j_parent))
      {
        JS_FreeValue(data->context, j_parent);
        JS_FreeValue(data->context, ruby_data[0]);
        JS_FreeValue(data->context, ruby_data[1]);
        rb_raise(rb_eArgError, "cannot define function: '%s' is not an object", first_seg);
      }

      for (long i = 1; i < path_len - 1; i++)
      {
        VALUE r_seg_str = rb_funcall(RARRAY_AREF(r_name, i), rb_intern("to_s"), 0);
        JSValue j_next = JS_GetPropertyStr(data->context, j_parent, StringValueCStr(r_seg_str));
        JS_FreeValue(data->context, j_parent);

        if (JS_IsException(j_next) || !JS_IsObject(j_next))
        {
          JS_FreeValue(data->context, j_next);
          JS_FreeValue(data->context, ruby_data[0]);
          JS_FreeValue(data->context, ruby_data[1]);
          rb_raise(rb_eArgError, "cannot define function: '%s' is not an object", StringValueCStr(r_seg_str));
        }
        j_parent = j_next;
      }
    }

    JS_SetPropertyStr(
        data->context, j_parent, funcName,
        JS_NewCFunctionData(data->context, js_quickjsrb_call_global, 1, 0, 2, ruby_data));
    JS_FreeValue(data->context, j_parent);
    JS_FreeValue(data->context, ruby_data[0]);
    JS_FreeValue(data->context, ruby_data[1]);

    VALUE r_result = rb_ary_new();
    for (long i = 0; i < path_len; i++)
      rb_ary_push(r_result, rb_funcall(RARRAY_AREF(r_name, i), rb_intern("to_sym"), 0));
    return r_result;
  }
  else if (SYMBOL_P(r_name) || RB_TYPE_P(r_name, T_STRING))
  {
    VALUE r_name_sym = rb_funcall(r_name, rb_intern("to_sym"), 0);

    rb_hash_aset(data->defined_functions, r_name_sym, r_block);
    VALUE r_name_str = rb_funcall(r_name, rb_intern("to_s"), 0);
    char *funcName = StringValueCStr(r_name_str);

    JSValueConst ruby_data[2];
    ruby_data[0] = JS_NewString(data->context, funcName);
    ruby_data[1] = JS_NewBool(data->context, RTEST(rb_funcall(r_flags, rb_intern("include?"), 1, ID2SYM(rb_intern("async")))));

    JSValue j_global = JS_GetGlobalObject(data->context);
    JS_SetPropertyStr(
        data->context, j_global, funcName,
        JS_NewCFunctionData(data->context, js_quickjsrb_call_global, 1, 0, 2, ruby_data));
    JS_FreeValue(data->context, j_global);
    JS_FreeValue(data->context, ruby_data[0]);
    JS_FreeValue(data->context, ruby_data[1]);

    return r_name_sym;
  }
  else
  {
    rb_raise(rb_eTypeError, "function's name should be a Symbol or a String");
  }
}

#eval_code(r_code) ⇒ Object 



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# File 'ext/quickjsrb/quickjsrb.c', line 845

static VALUE vm_m_evalCode(VALUE r_self, VALUE r_code)
{
  VMData *data;
  TypedData_Get_Struct(r_self, VMData, &vm_type, data);

  if (!RB_TYPE_P(r_code, T_STRING))
  {
    VALUE r_code_class = rb_class_name(CLASS_OF(r_code));
    rb_raise(rb_eTypeError, "JavaScript code must be a String, got %s", StringValueCStr(r_code_class));
  }

  clock_gettime(CLOCK_MONOTONIC, &data->eval_time->started_at);
  JS_SetInterruptHandler(JS_GetRuntime(data->context), interrupt_handler, data->eval_time);

  char *code = StringValueCStr(r_code);
  JSValue j_codeResult = JS_Eval(data->context, code, strlen(code), "<code>", JS_EVAL_TYPE_GLOBAL | JS_EVAL_FLAG_ASYNC);
  JSValue j_awaitedResult = js_std_await(data->context, j_codeResult); // This frees j_codeResult
  // JS_EVAL_FLAG_ASYNC wraps the result in {value, done} — extract the actual value
  // Free j_awaitedResult before to_rb_return_value because it may raise (longjmp), which would skip cleanup
  JSValue j_returnedValue = JS_GetPropertyStr(data->context, j_awaitedResult, "value");
  JS_FreeValue(data->context, j_awaitedResult);
  return to_rb_return_value(data->context, j_returnedValue);
}

#import(*args) ⇒ Object 



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# File 'ext/quickjsrb/quickjsrb.c', line 1127

static VALUE vm_m_import(int argc, VALUE *argv, VALUE r_self)
{
  VALUE r_import_string, r_opts;
  rb_scan_args(argc, argv, "10:", &r_import_string, &r_opts);
  if (NIL_P(r_opts))
    r_opts = rb_hash_new();
  VALUE r_from = rb_hash_aref(r_opts, ID2SYM(rb_intern("from")));
  if (NIL_P(r_from))
  {
    VALUE r_error_message = rb_str_new2("missing import source");
    rb_exc_raise(rb_funcall(QUICKJSRB_ERROR_FOR(QUICKJSRB_ROOT_RUNTIME_ERROR), rb_intern("new"), 2, r_error_message, Qnil));
    return Qnil;
  }
  VALUE r_custom_exposure = rb_hash_aref(r_opts, ID2SYM(rb_intern("code_to_expose")));

  VMData *data;
  TypedData_Get_Struct(r_self, VMData, &vm_type, data);

  char *filename = random_string();
  char *source = StringValueCStr(r_from);
  JSValue module = JS_Eval(data->context, source, strlen(source), filename, JS_EVAL_TYPE_MODULE | JS_EVAL_FLAG_COMPILE_ONLY);
  if (JS_IsException(module))
  {
    JS_FreeValue(data->context, module);
    return to_rb_value(data->context, module);
  }
  js_module_set_import_meta(data->context, module, TRUE, FALSE);
  JS_FreeValue(data->context, module);

  VALUE r_import_settings = rb_funcall(
      rb_const_get(rb_cClass, rb_intern("Quickjs")),
      rb_intern("_build_import"),
      1,
      r_import_string);
  VALUE r_import_name = rb_ary_entry(r_import_settings, 0);
  char *import_name = StringValueCStr(r_import_name);
  VALUE r_default_exposure = rb_ary_entry(r_import_settings, 1);
  char *globalize;
  if (RTEST(r_custom_exposure))
  {
    globalize = StringValueCStr(r_custom_exposure);
  }
  else
  {
    globalize = StringValueCStr(r_default_exposure);
  }

  const char *importAndGlobalizeModule = "import %s from '%s';\n"
                                         "%s\n";
  int length = snprintf(NULL, 0, importAndGlobalizeModule, import_name, filename, globalize);
  char *result = (char *)malloc(length + 1);
  snprintf(result, length + 1, importAndGlobalizeModule, import_name, filename, globalize);

  JSValue j_codeResult = JS_Eval(data->context, result, strlen(result), "<vm>", JS_EVAL_TYPE_MODULE);
  free(result);
  JS_FreeValue(data->context, j_codeResult);

  return Qtrue;
}

#on_log ⇒ Object 



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# File 'ext/quickjsrb/quickjsrb.c', line 608

static VALUE vm_m_on_log(VALUE r_self)
{
  rb_need_block();

  VMData *data;
  TypedData_Get_Struct(r_self, VMData, &vm_type, data);

  data->log_listener = rb_block_proc();

  return Qnil;
}