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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.h"
#include "env.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 {
using v8::Local;
using v8::Message;
using v8::Value;
enum ErrorHandlingMode { CONTEXTIFY_ERROR, FATAL_ERROR, MODULE_ERROR };
void AppendExceptionLine(Environment* env,
Local<Value> er,
Local<Message> message,
enum ErrorHandlingMode mode);
[[noreturn]] void FatalError(const char* location, const char* message);
void OnFatalError(const char* location, const char* message);
void PrintErrorString(const char* format, ...);
// 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_CONTEXT_NOT_AVAILABLE, Error) \
V(ERR_BUFFER_OUT_OF_BOUNDS, RangeError) \
V(ERR_BUFFER_TOO_LARGE, Error) \
V(ERR_CONSTRUCT_CALL_REQUIRED, TypeError) \
V(ERR_CONSTRUCT_CALL_INVALID, TypeError) \
V(ERR_INVALID_ARG_VALUE, TypeError) \
V(ERR_OSSL_EVP_INVALID_DIGEST, Error) \
V(ERR_INVALID_ARG_TYPE, TypeError) \
V(ERR_INVALID_MODULE_SPECIFIER, TypeError) \
V(ERR_INVALID_PACKAGE_CONFIG, SyntaxError) \
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_PASSPHRASE, TypeError) \
V(ERR_MISSING_PLATFORM_FOR_WORKER, Error) \
V(ERR_MODULE_NOT_FOUND, 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_TLS_INVALID_PROTOCOL_METHOD, TypeError) \
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).Check(); \
return e; \
} \
inline void THROW_ ## code(v8::Isolate* isolate, const char* message) { \
isolate->ThrowException(code(isolate, message)); \
} \
inline void THROW_ ## code(Environment* env, const char* message) { \
THROW_ ## code(env->isolate(), message); \
}
ERRORS_WITH_CODE(V)
#undef V
// Errors with predefined static messages
#define PREDEFINED_ERROR_MESSAGES(V) \
V(ERR_BUFFER_CONTEXT_NOT_AVAILABLE, \
"Buffer is not available for the current Context") \
V(ERR_CONSTRUCT_CALL_INVALID, "Constructor cannot be called") \
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_OSSL_EVP_INVALID_DIGEST, "Invalid digest used") \
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(v8::Isolate* isolate) { \
isolate->ThrowException(code(isolate, message)); \
} \
inline void THROW_ ## code(Environment* env) { \
THROW_ ## code(env->isolate()); \
}
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 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 errors {
class TryCatchScope : public v8::TryCatch {
public:
enum class CatchMode { kNormal, kFatal };
explicit TryCatchScope(Environment* env, CatchMode mode = CatchMode::kNormal)
: v8::TryCatch(env->isolate()), env_(env), mode_(mode) {}
~TryCatchScope();
// Since the dtor is not virtual we need to make sure no one creates
// object of it in the free store that might be held by polymorphic pointers.
void* operator new(std::size_t count) = delete;
void* operator new[](std::size_t count) = delete;
TryCatchScope(TryCatchScope&) = delete;
TryCatchScope(TryCatchScope&&) = delete;
TryCatchScope operator=(TryCatchScope&) = delete;
TryCatchScope operator=(TryCatchScope&&) = delete;
private:
Environment* env_;
CatchMode mode_;
};
// Trigger the global uncaught exception handler `process._fatalException`
// in JS land (which emits the 'uncaughtException' event). If that returns
// true, continue program execution, otherwise exit the process.
void TriggerUncaughtException(v8::Isolate* isolate,
const v8::TryCatch& try_catch);
void TriggerUncaughtException(v8::Isolate* isolate,
Local<Value> error,
Local<Message> message,
bool from_promise = false);
const char* errno_string(int errorno);
void PerIsolateMessageListener(v8::Local<v8::Message> message,
v8::Local<v8::Value> error);
void DecorateErrorStack(Environment* env,
const errors::TryCatchScope& try_catch);
} // namespace errors
} // namespace node
#endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#endif // SRC_NODE_ERRORS_H_