/*************************************************************************/ /* error_macros.h */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining */ /* a copy of this software and associated documentation files (the */ /* "Software"), to deal in the Software without restriction, including */ /* without limitation the rights to use, copy, modify, merge, publish, */ /* distribute, sublicense, and/or sell copies of the Software, and to */ /* permit persons to whom the Software is furnished to do so, subject to */ /* the following conditions: */ /* */ /* The above copyright notice and this permission notice shall be */ /* included in all copies or substantial portions of the Software. */ /* */ /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /*************************************************************************/ #ifndef ERROR_MACROS_H #define ERROR_MACROS_H #include "core/safe_refcount.h" #include "core/typedefs.h" /** * Error macros. Unlike exceptions and asserts, these macros try to maintain consistency and stability * inside the code. It is recommended to always return processable data, so in case of an error, * the engine can keep working well. * In most cases, bugs and/or invalid data are not fatal and should never allow a perfectly running application * to fail or crash. */ /** * Pointer to the error macro printing function. Reassign to any function to have errors printed */ /** Function used by the error macros */ // function, file, line, error, explanation enum ErrorHandlerType { ERR_HANDLER_ERROR, ERR_HANDLER_WARNING, ERR_HANDLER_SCRIPT, ERR_HANDLER_SHADER, }; class String; typedef void (*ErrorHandlerFunc)(void *, const char *, const char *, int p_line, const char *, const char *, ErrorHandlerType p_type); struct ErrorHandlerList { ErrorHandlerFunc errfunc; void *userdata; ErrorHandlerList *next; ErrorHandlerList() { errfunc = nullptr; next = nullptr; userdata = nullptr; } }; void add_error_handler(ErrorHandlerList *p_handler); void remove_error_handler(ErrorHandlerList *p_handler); void _err_print_error(const char *p_function, const char *p_file, int p_line, const char *p_error, ErrorHandlerType p_type = ERR_HANDLER_ERROR); void _err_print_error(const char *p_function, const char *p_file, int p_line, const String &p_error, ErrorHandlerType p_type = ERR_HANDLER_ERROR); void _err_print_error(const char *p_function, const char *p_file, int p_line, const char *p_error, const char *p_message, ErrorHandlerType p_type = ERR_HANDLER_ERROR); void _err_print_error(const char *p_function, const char *p_file, int p_line, const String &p_error, const char *p_message, ErrorHandlerType p_type = ERR_HANDLER_ERROR); void _err_print_error(const char *p_function, const char *p_file, int p_line, const char *p_error, const String &p_message, ErrorHandlerType p_type = ERR_HANDLER_ERROR); void _err_print_error(const char *p_function, const char *p_file, int p_line, const String &p_error, const String &p_message, ErrorHandlerType p_type = ERR_HANDLER_ERROR); void _err_print_index_error(const char *p_function, const char *p_file, int p_line, int64_t p_index, int64_t p_size, const char *p_index_str, const char *p_size_str, const char *p_message = "", bool fatal = false); void _err_print_index_error(const char *p_function, const char *p_file, int p_line, int64_t p_index, int64_t p_size, const char *p_index_str, const char *p_size_str, const String &p_message, bool fatal = false); #ifndef _STR #define _STR(m_x) #m_x #define _MKSTR(m_x) _STR(m_x) #endif #define _FNL __FILE__ ":" /** An index has failed if m_index<0 or m_index >=m_size, the function exits */ #ifdef __GNUC__ //#define FUNCTION_STR __PRETTY_FUNCTION__ - too annoying #define FUNCTION_STR __FUNCTION__ #else #define FUNCTION_STR __FUNCTION__ #endif // Don't use this directly; instead, use any of the CRASH_* macros #ifdef _MSC_VER #define GENERATE_TRAP \ __debugbreak(); \ /* Avoid warning about control paths */ \ for (;;) { \ } #else #define GENERATE_TRAP __builtin_trap(); #endif // (*): See https://stackoverflow.com/questions/257418/do-while-0-what-is-it-good-for /** * If `m_index` is less than 0 or greater than or equal to `m_size`, prints a generic * error message and returns from the function. This macro should be preferred to * `ERR_FAIL_COND` for bounds checking. */ #define ERR_FAIL_INDEX(m_index, m_size) \ if (unlikely((m_index) < 0 || (m_index) >= (m_size))) { \ _err_print_index_error(FUNCTION_STR, __FILE__, __LINE__, m_index, m_size, _STR(m_index), _STR(m_size)); \ return; \ } else \ ((void)0) /** * If `m_index` is less than 0 or greater than or equal to `m_size`, prints a custom * error message and returns from the function. This macro should be preferred to * `ERR_FAIL_COND_MSG` for bounds checking. */ #define ERR_FAIL_INDEX_MSG(m_index, m_size, m_msg) \ if (unlikely((m_index) < 0 || (m_index) >= (m_size))) { \ _err_print_index_error(FUNCTION_STR, __FILE__, __LINE__, m_index, m_size, _STR(m_index), _STR(m_size), m_msg); \ return; \ } else \ ((void)0) /** * If `m_index` is less than 0 or greater than or equal to `m_size`, * prints a generic error message and returns the value specified in `m_retval`. * This macro should be preferred to `ERR_FAIL_COND_V` for bounds checking. */ #define ERR_FAIL_INDEX_V(m_index, m_size, m_retval) \ if (unlikely((m_index) < 0 || (m_index) >= (m_size))) { \ _err_print_index_error(FUNCTION_STR, __FILE__, __LINE__, m_index, m_size, _STR(m_index), _STR(m_size)); \ return m_retval; \ } else \ ((void)0) /** * If `m_index` is less than 0 or greater than or equal to `m_size`, * prints a custom error message and returns the value specified in `m_retval`. * This macro should be preferred to `ERR_FAIL_COND_V_MSG` for bounds checking. */ #define ERR_FAIL_INDEX_V_MSG(m_index, m_size, m_retval, m_msg) \ if (unlikely((m_index) < 0 || (m_index) >= (m_size))) { \ _err_print_index_error(FUNCTION_STR, __FILE__, __LINE__, m_index, m_size, _STR(m_index), _STR(m_size), m_msg); \ return m_retval; \ } else \ ((void)0) /** * If `m_index` is greater than or equal to `m_size`, * prints a generic error message and returns the value specified in `m_retval`. * This macro should be preferred to `ERR_FAIL_COND_V` for unsigned bounds checking. */ #define ERR_FAIL_UNSIGNED_INDEX(m_index, m_size) \ if (unlikely((m_index) >= (m_size))) { \ _err_print_index_error(FUNCTION_STR, __FILE__, __LINE__, m_index, m_size, _STR(m_index), _STR(m_size)); \ return; \ } else \ ((void)0) /** * If `m_index` is greater than or equal to `m_size`, * prints a generic error message and returns the value specified in `m_retval`. * This macro should be preferred to `ERR_FAIL_COND_V` for unsigned bounds checking. */ #define ERR_FAIL_UNSIGNED_INDEX_V(m_index, m_size, m_retval) \ if (unlikely((m_index) >= (m_size))) { \ _err_print_index_error(FUNCTION_STR, __FILE__, __LINE__, m_index, m_size, _STR(m_index), _STR(m_size)); \ return m_retval; \ } else \ ((void)0) /** * If `m_index` is greater than or equal to `m_size`, * prints a custom error message and returns the value specified in `m_retval`. * This macro should be preferred to `ERR_FAIL_COND_V_MSG` for unsigned bounds checking. */ #define ERR_FAIL_UNSIGNED_INDEX_V_MSG(m_index, m_size, m_retval, m_msg) \ if (unlikely((m_index) >= (m_size))) { \ _err_print_index_error(FUNCTION_STR, __FILE__, __LINE__, m_index, m_size, _STR(m_index), _STR(m_size), m_msg); \ return m_retval; \ } else \ ((void)0) /** * If `m_index` is less than 0 or greater than or equal to `m_size`, * crashes the engine immediately with a generic error message. * Only use this if there's no sensible fallback (i.e. the error is unrecoverable). * This macro should be preferred to `CRASH_COND` for bounds checking. */ #define CRASH_BAD_INDEX(m_index, m_size) \ if (unlikely((m_index) < 0 || (m_index) >= (m_size))) { \ _err_print_index_error(FUNCTION_STR, __FILE__, __LINE__, m_index, m_size, _STR(m_index), _STR(m_size), "", true); \ GENERATE_TRAP \ } else \ ((void)0) /** * If `m_index` is less than 0 or greater than or equal to `m_size`, * crashes the engine immediately with a custom error message. * Only use this if there's no sensible fallback (i.e. the error is unrecoverable). * This macro should be preferred to `CRASH_COND` for bounds checking. */ #define CRASH_BAD_INDEX_MSG(m_index, m_size, m_msg) \ if (unlikely((m_index) < 0 || (m_index) >= (m_size))) { \ _err_print_index_error(FUNCTION_STR, __FILE__, __LINE__, m_index, m_size, _STR(m_index), _STR(m_size), m_msg, true); \ GENERATE_TRAP \ } else \ ((void)0) /** * If `m_index` is greater than or equal to `m_size`, * crashes the engine immediately with a generic error message. * Only use this if there's no sensible fallback (i.e. the error is unrecoverable). * This macro should be preferred to `CRASH_COND` for bounds checking. */ #define CRASH_BAD_UNSIGNED_INDEX(m_index, m_size) \ if (unlikely((m_index) >= (m_size))) { \ _err_print_index_error(FUNCTION_STR, __FILE__, __LINE__, m_index, m_size, _STR(m_index), _STR(m_size), "", true); \ GENERATE_TRAP \ } else \ ((void)0) /** * If `m_param` is `null`, prints a generic error message and returns from the function. */ #define ERR_FAIL_NULL(m_param) \ if (unlikely(!m_param)) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Parameter \"" _STR(m_param) "\" is null."); \ return; \ } else \ ((void)0) /** * If `m_param` is `null`, prints a custom error message and returns from the function. */ #define ERR_FAIL_NULL_MSG(m_param, m_msg) \ if (unlikely(!m_param)) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Parameter \"" _STR(m_param) "\" is null.", m_msg); \ return; \ } else \ ((void)0) /** * If `m_param` is `null`, prints a generic error message and returns the value specified in `m_retval`. */ #define ERR_FAIL_NULL_V(m_param, m_retval) \ if (unlikely(!m_param)) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Parameter \"" _STR(m_param) "\" is null."); \ return m_retval; \ } else \ ((void)0) /** * If `m_param` is `null`, prints a custom error message and returns the value specified in `m_retval`. */ #define ERR_FAIL_NULL_V_MSG(m_param, m_retval, m_msg) \ if (unlikely(!m_param)) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Parameter \"" _STR(m_param) "\" is null.", m_msg); \ return m_retval; \ } else \ ((void)0) /** * If `m_cond` evaluates to `true`, prints a generic error message and returns from the function. */ #define ERR_FAIL_COND(m_cond) \ if (unlikely(m_cond)) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition \"" _STR(m_cond) "\" is true."); \ return; \ } else \ ((void)0) /** * If `m_cond` evaluates to `true`, prints a custom error message and returns from the function. */ #define ERR_FAIL_COND_MSG(m_cond, m_msg) \ if (unlikely(m_cond)) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition \"" _STR(m_cond) "\" is true.", m_msg); \ return; \ } else \ ((void)0) /** * If `m_cond` evaluates to `true`, crashes the engine immediately with a generic error message. * Only use this if there's no sensible fallback (i.e. the error is unrecoverable). */ #define CRASH_COND(m_cond) \ if (unlikely(m_cond)) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, "FATAL: Condition \"" _STR(m_cond) "\" is true."); \ GENERATE_TRAP \ } else \ ((void)0) /** * If `m_cond` evaluates to `true`, crashes the engine immediately with a custom error message. * Only use this if there's no sensible fallback (i.e. the error is unrecoverable). */ #define CRASH_COND_MSG(m_cond, m_msg) \ if (unlikely(m_cond)) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, "FATAL: Condition \"" _STR(m_cond) "\" is true.", m_msg); \ GENERATE_TRAP \ } else \ ((void)0) /** * If `m_cond` evaluates to `true`, prints a generic error message and returns the value specified in `m_retval`. */ #define ERR_FAIL_COND_V(m_cond, m_retval) \ if (unlikely(m_cond)) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition \"" _STR(m_cond) "\" is true. Returned: " _STR(m_retval)); \ return m_retval; \ } else \ ((void)0) /** * If `m_cond` evaluates to `true`, prints a custom error message and returns the value specified in `m_retval`. */ #define ERR_FAIL_COND_V_MSG(m_cond, m_retval, m_msg) \ if (unlikely(m_cond)) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition \"" _STR(m_cond) "\" is true. Returned: " _STR(m_retval), m_msg); \ return m_retval; \ } else \ ((void)0) /** * If `m_cond` evaluates to `true`, prints a custom error message and continues the loop the macro is located in. */ #define ERR_CONTINUE(m_cond) \ if (unlikely(m_cond)) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition \"" _STR(m_cond) "\" is true. Continuing."); \ continue; \ } else \ ((void)0) /** * If `m_cond` evaluates to `true`, prints a custom error message and continues the loop the macro is located in. */ #define ERR_CONTINUE_MSG(m_cond, m_msg) \ if (unlikely(m_cond)) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition \"" _STR(m_cond) "\" is true. Continuing.", m_msg); \ continue; \ } else \ ((void)0) /** * If `m_cond` evaluates to `true`, prints a generic error message and breaks from the loop the macro is located in. */ #define ERR_BREAK(m_cond) \ if (unlikely(m_cond)) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition \"" _STR(m_cond) "\" is true. Breaking."); \ break; \ } else \ ((void)0) /** * If `m_cond` evaluates to `true`, prints a custom error message and breaks from the loop the macro is located in. */ #define ERR_BREAK_MSG(m_cond, m_msg) \ if (unlikely(m_cond)) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition \"" _STR(m_cond) "\" is true. Breaking.", m_msg); \ break; \ } else \ ((void)0) /** * Prints a generic error message and returns from the function. */ #define ERR_FAIL() \ if (true) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Method failed."); \ return; \ } else \ ((void)0) /** * Prints a custom error message and returns from the function. */ #define ERR_FAIL_MSG(m_msg) \ if (true) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Method failed.", m_msg); \ return; \ } else \ ((void)0) /** * Prints a generic error message and returns the value specified in `m_retval`. */ #define ERR_FAIL_V(m_retval) \ if (true) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Method failed. Returning: " __STR(m_retval)); \ return m_retval; \ } else \ ((void)0) /** * Prints a custom error message and returns the value specified in `m_retval`. */ #define ERR_FAIL_V_MSG(m_retval, m_msg) \ if (true) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Method failed. Returning: " __STR(m_retval), m_msg); \ return m_retval; \ } else \ ((void)0) /** * Crashes the engine immediately with a generic error message. * Only use this if there's no sensible fallback (i.e. the error is unrecoverable). */ #define CRASH_NOW() \ if (true) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, "FATAL: Method failed."); \ GENERATE_TRAP \ } else \ ((void)0) /** * Crashes the engine immediately with a custom error message. * Only use this if there's no sensible fallback (i.e. the error is unrecoverable). */ #define CRASH_NOW_MSG(m_msg) \ if (true) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, "FATAL: Method failed.", m_msg); \ GENERATE_TRAP \ } else \ ((void)0) /** * Prints an error message without returning. */ #define ERR_PRINT(m_string) \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, m_string) /** * Prints an error message without returning, but only do so once in the application lifecycle. * This can be used to avoid spamming the console with error messages. */ #define ERR_PRINT_ONCE(m_string) \ if (true) { \ static bool first_print = true; \ if (first_print) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, m_string); \ first_print = false; \ } \ } else \ ((void)0) /** * Prints a warning message without returning. To warn about deprecated usage, * use `WARN_DEPRECATED` or `WARN_DEPRECATED_MSG` instead. */ #define WARN_PRINT(m_string) \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, m_string, ERR_HANDLER_WARNING) /** * Prints a warning message without returning, but only do so once in the application lifecycle. * This can be used to avoid spamming the console with warning messages. */ #define WARN_PRINT_ONCE(m_string) \ if (true) { \ static bool first_print = true; \ if (first_print) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, m_string, ERR_HANDLER_WARNING); \ first_print = false; \ } \ } else \ ((void)0) /** * Prints a generic deprecation warning message without returning. * This should be preferred to `WARN_PRINT` for deprecation warnings. */ #define WARN_DEPRECATED \ if (true) { \ static SafeFlag warning_shown; \ if (!warning_shown.is_set()) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, "This method has been deprecated and will be removed in the future.", ERR_HANDLER_WARNING); \ warning_shown.set(); \ } \ } else \ ((void)0) /** * Prints a custom deprecation warning message without returning. * This should be preferred to `WARN_PRINT` for deprecation warnings. */ #define WARN_DEPRECATED_MSG(m_msg) \ if (true) { \ static SafeFlag warning_shown; \ if (!warning_shown.is_set()) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, "This method has been deprecated and will be removed in the future.", m_msg, ERR_HANDLER_WARNING); \ warning_shown.set(); \ } \ } else \ ((void)0) #endif /** * This should be a 'free' assert for program flow and should not be needed in any releases, * only used in dev builds. */ #ifdef DEV_ENABLED #define DEV_ASSERT(m_cond) \ if (unlikely(!(m_cond))) { \ _err_print_error(FUNCTION_STR, __FILE__, __LINE__, "FATAL: DEV_ASSERT failed \"" _STR(m_cond) "\" is false."); \ GENERATE_TRAP \ } else \ ((void)0) #else #define DEV_ASSERT(m_cond) #endif /** * These should be 'free' checks for program flow and should not be needed in any releases, * only used in dev builds. */ #ifdef DEV_ENABLED #define DEV_CHECK(m_cond) \ if (unlikely(!(m_cond))) { \ ERR_PRINT("DEV_CHECK failed \"" _STR(m_cond) "\" is false."); \ } else \ ((void)0) #else #define DEV_CHECK(m_cond) #endif #ifdef DEV_ENABLED #define DEV_CHECK_ONCE(m_cond) \ if (unlikely(!(m_cond))) { \ ERR_PRINT_ONCE("DEV_CHECK_ONCE failed \"" _STR(m_cond) "\" is false."); \ } else \ ((void)0) #else #define DEV_CHECK_ONCE(m_cond) #endif