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node_errors.h
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node_errors.h
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#ifndef SRC_NODE_ERRORS_H_
#define SRC_NODE_ERRORS_H_
#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#include "node.h"
#include "util-inl.h"
#include "env-inl.h"
#include "v8.h"
// Use ostringstream to print exact-width integer types
// because the format specifiers are not available on AIX.
#include <sstream>
namespace node {
// Helpers to construct errors similar to the ones provided by
// lib/internal/errors.js.
// Example: with `V(ERR_INVALID_ARG_TYPE, TypeError)`, there will be
// `node::ERR_INVALID_ARG_TYPE(isolate, "message")` returning
// a `Local<Value>` containing the TypeError with proper code and message
#define ERRORS_WITH_CODE(V) \
V(ERR_BUFFER_OUT_OF_BOUNDS, RangeError) \
V(ERR_BUFFER_TOO_LARGE, Error) \
V(ERR_CANNOT_TRANSFER_OBJECT, TypeError) \
V(ERR_CLOSED_MESSAGE_PORT, Error) \
V(ERR_CONSTRUCT_CALL_REQUIRED, Error) \
V(ERR_INVALID_ARG_VALUE, TypeError) \
V(ERR_INVALID_ARG_TYPE, TypeError) \
V(ERR_INVALID_TRANSFER_OBJECT, TypeError) \
V(ERR_MEMORY_ALLOCATION_FAILED, Error) \
V(ERR_MISSING_ARGS, TypeError) \
V(ERR_MISSING_MESSAGE_PORT_IN_TRANSFER_LIST, TypeError) \
V(ERR_MISSING_MODULE, Error) \
V(ERR_MISSING_PLATFORM_FOR_WORKER, Error) \
V(ERR_OUT_OF_RANGE, RangeError) \
V(ERR_SCRIPT_EXECUTION_INTERRUPTED, Error) \
V(ERR_SCRIPT_EXECUTION_TIMEOUT, Error) \
V(ERR_STRING_TOO_LONG, Error) \
V(ERR_TRANSFERRING_EXTERNALIZED_SHAREDARRAYBUFFER, TypeError) \
#define V(code, type) \
inline v8::Local<v8::Value> code(v8::Isolate* isolate, \
const char* message) { \
v8::Local<v8::String> js_code = OneByteString(isolate, #code); \
v8::Local<v8::String> js_msg = OneByteString(isolate, message); \
v8::Local<v8::Object> e = \
v8::Exception::type(js_msg)->ToObject( \
isolate->GetCurrentContext()).ToLocalChecked(); \
e->Set(isolate->GetCurrentContext(), OneByteString(isolate, "code"), \
js_code).FromJust(); \
return e; \
} \
inline void THROW_ ## code(Environment* env, const char* message) { \
env->isolate()->ThrowException(code(env->isolate(), message)); \
}
ERRORS_WITH_CODE(V)
#undef V
// Errors with predefined static messages
#define PREDEFINED_ERROR_MESSAGES(V) \
V(ERR_CANNOT_TRANSFER_OBJECT, "Cannot transfer object of unsupported type")\
V(ERR_CLOSED_MESSAGE_PORT, "Cannot send data on closed MessagePort") \
V(ERR_CONSTRUCT_CALL_REQUIRED, "Cannot call constructor without `new`") \
V(ERR_INVALID_TRANSFER_OBJECT, "Found invalid object in transferList") \
V(ERR_MEMORY_ALLOCATION_FAILED, "Failed to allocate memory") \
V(ERR_MISSING_MESSAGE_PORT_IN_TRANSFER_LIST, \
"MessagePort was found in message but not listed in transferList") \
V(ERR_MISSING_PLATFORM_FOR_WORKER, \
"The V8 platform used by this instance of Node does not support " \
"creating Workers") \
V(ERR_SCRIPT_EXECUTION_INTERRUPTED, \
"Script execution was interrupted by `SIGINT`") \
V(ERR_TRANSFERRING_EXTERNALIZED_SHAREDARRAYBUFFER, \
"Cannot serialize externalized SharedArrayBuffer") \
#define V(code, message) \
inline v8::Local<v8::Value> code(v8::Isolate* isolate) { \
return code(isolate, message); \
} \
inline void THROW_ ## code(Environment* env) { \
env->isolate()->ThrowException(code(env->isolate(), message)); \
}
PREDEFINED_ERROR_MESSAGES(V)
#undef V
// Errors with predefined non-static messages
inline void THROW_ERR_SCRIPT_EXECUTION_TIMEOUT(Environment* env,
int64_t timeout) {
std::ostringstream message;
message << "Script execution timed out after ";
message << timeout << "ms";
THROW_ERR_SCRIPT_EXECUTION_TIMEOUT(env, message.str().c_str());
}
inline void THROW_ERR_OUT_OF_RANGE_WITH_TEXT(Environment* env,
const char* messageText) {
std::ostringstream message;
message << messageText;
THROW_ERR_OUT_OF_RANGE(env, message.str().c_str());
}
inline v8::Local<v8::Value> ERR_BUFFER_TOO_LARGE(v8::Isolate* isolate) {
char message[128];
snprintf(message, sizeof(message),
"Cannot create a Buffer larger than 0x%zx bytes",
v8::TypedArray::kMaxLength);
return ERR_BUFFER_TOO_LARGE(isolate, message);
}
inline v8::Local<v8::Value> ERR_STRING_TOO_LONG(v8::Isolate* isolate) {
char message[128];
snprintf(message, sizeof(message),
"Cannot create a string longer than 0x%x characters",
v8::String::kMaxLength);
return ERR_STRING_TOO_LONG(isolate, message);
}
#define THROW_AND_RETURN_IF_NOT_BUFFER(env, val, prefix) \
do { \
if (!Buffer::HasInstance(val)) \
return node::THROW_ERR_INVALID_ARG_TYPE(env, \
prefix " must be a buffer"); \
} while (0)
#define THROW_AND_RETURN_IF_NOT_STRING(env, val, prefix) \
do { \
if (!val->IsString()) \
return node::THROW_ERR_INVALID_ARG_TYPE(env, \
prefix " must be a string"); \
} while (0)
} // namespace node
#endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#endif // SRC_NODE_ERRORS_H_