4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2003, 2004, 2005 Develer S.r.l. (http://www.develer.com/)
33 * \defgroup debug Debugging facilities and macros
37 * \brief Simple debug facilities for hosted and embedded C/C++ applications.
39 * Debug output goes to stderr in hosted applications.
40 * Freestanding (AKA embedded) applications use \c drv/kdebug.c to output
41 * diagnostic messages to a serial terminal or a JTAG debugger.
43 * \author Bernie Innocenti <bernie@codewiz.org>
45 * $WIZ$ module_name = "debug"
46 * $WIZ$ module_configuration = "bertos/cfg/cfg_debug.h"
48 * $WIZ$ module_depends = "formatwr"
49 * $WIZ$ module_supports = "not atmega103"
52 #ifndef BERTOS_DEBUG_H
53 #define BERTOS_DEBUG_H
56 #include <cfg/compiler.h>
58 #include "cfg/cfg_debug.h" /* CONFIG_KDEBUG_* */
61 * Defaults for rarely used config stuff.
63 #ifndef CONFIG_KDEBUG_TRACE
64 #define CONFIG_KDEBUG_TRACE 1
67 #ifndef CONFIG_KDEBUG_VERBOSE_ASSERT
68 #define CONFIG_KDEBUG_VERBOSE_ASSERT 1
71 #ifndef CONFIG_KDEBUG_WALLS
72 #define CONFIG_KDEBUG_WALLS 1
75 #if defined(__doxygen__)
77 * Preprocessor symbol defined only for debug builds.
79 * The build infrastructure must arrange for _DEBUG to
80 * be predefined for all the source files being compiled.
82 * This is compatible with the MSVC convention for the
83 * default Debug and Release project targets.
89 // STLport specific: enable extra checks
92 // MSVC specific: Enable memory allocation debug
98 * On UNIX systems the extabilished practice is to define
99 * NDEBUG for release builds and nothing for debug builds.
106 * This macro duplicates the old MSVC trick of redefining
107 * THIS_FILE locally to avoid the overhead of many duplicate
108 * strings in ASSERT().
111 #define THIS_FILE __FILE__
115 * This macro can be used to conditionally exclude one or more
116 * statements conditioned on \c _DEBUG, avoiding the clutter
117 * of ifdef/endif pairs.
124 * DB(int ref_count;) // Track number of users
135 #include <cpu/attr.h> /* CPU_HARVARD */
137 /* These are implemented in drv/kdebug.c */
138 void kdbg_init(void);
139 void kputchar(char c);
140 int kputnum(int num);
141 void kdump(const void *buf, size_t len);
142 void __init_wall(long *wall, int size);
146 void kputs_P(const char *PROGMEM str);
147 void kprintf_P(const char *PROGMEM fmt, ...) FORMAT(__printf__, 1, 2);
148 int __bassert_P(const char *PROGMEM cond, const char *PROGMEM file, int line);
149 void __trace_P(const char *func);
150 void __tracemsg_P(const char *func, const char *PROGMEM fmt, ...);
151 int __invalid_ptr_P(void *p, const char *PROGMEM name, const char *PROGMEM file, int line);
152 int __check_wall_P(long *wall, int size, const char * PGM_ATTR name, const char * PGM_ATTR file, int line);
153 #define kputs(str) kputs_P(PSTR(str))
154 #define kprintf(fmt, ...) kprintf_P(PSTR(fmt) ,## __VA_ARGS__)
155 #define __bassert(cond, file, line) __bassert_P(PSTR(cond), PSTR(file), (line))
156 #define __trace(func) __trace_P(func)
157 #define __tracemsg(func, fmt, ...) __tracemsg_P(func, PSTR(fmt), ## __VA_ARGS__)
158 #define __invalid_ptr(p, name, file, line) __invalid_ptr_P((p), PSTR(name), PSTR(file), (line))
159 #define __check_wall(wall, size, name, file, line) __check_wall_P(wall, size, PSTR(name), PSTR(file), (line))
160 #else /* !CPU_HARVARD */
161 void kputs(const char *str);
162 void kprintf(const char *fmt, ...) FORMAT(__printf__, 1, 2);
163 int __bassert(const char *cond, const char *file, int line);
164 void __trace(const char *func);
165 void __tracemsg(const char *func, const char *fmt, ...) FORMAT(__printf__, 2, 3);
166 int __invalid_ptr(void *p, const char *name, const char *file, int line);
167 int __check_wall(long *wall, int size, const char *name, const char *file, int line);
168 #endif /* !CPU_HARVARD */
170 #if CONFIG_KDEBUG_VERBOSE_ASSERT
172 * Assert a pre-condition on code.
174 #define ASSERT(x) ((void)(LIKELY(x) ? 0 : __bassert(#x, THIS_FILE, __LINE__)))
176 * Assert a pre-condition and give explanation message when assert fails
178 #define ASSERT2(x, help) ((void)(LIKELY(x) ? 0 : __bassert(help " (" #x ")", THIS_FILE, __LINE__)))
180 #define ASSERT(x) ((void)(LIKELY(x) ? 0 : __bassert("", THIS_FILE, __LINE__)))
181 #define ASSERT2(x, help) ((void)ASSERT(x))
184 #define IS_VALID_PTR(p) (LIKELY((void *)(p) >= (void *)CPU_RAM_START))
186 * Check that the given pointer is either NULL or pointing to valid memory.
188 * The assumption here is that valid pointers never point to low
189 * memory regions. This helps catching pointers taken from
190 * struct/class memebers when the struct pointer was NULL.
192 * \see ASSERT_VALID_PTR_OR_NULL()
194 #define ASSERT_VALID_PTR(p) (IS_VALID_PTR(p) \
195 ? 0 : __invalid_ptr(p, #p, THIS_FILE, __LINE__))
198 * Check that the given pointer is not pointing to invalid memory.
200 * \note The check for invalid memory is architecture specific and
201 * conservative. The current implementation only checks against
204 * \see ASSERT_VALID_PTR()
206 #define ASSERT_VALID_PTR_OR_NULL(p) ((void)(LIKELY((p == NULL) \
207 || ((void *)(p) >= (void *)CPU_RAM_START)) \
208 ? 0 : __invalid_ptr((p), #p, THIS_FILE, __LINE__)))
210 #if CONFIG_KDEBUG_TRACE
211 #define TRACE __trace(__func__)
212 #define TRACEMSG(msg,...) __tracemsg(__func__, msg, ## __VA_ARGS__)
214 #define TRACE do {} while(0)
215 #define TRACEMSG(...) do {} while(0)
219 * Check that the given pointer actually points to an object
220 * of the specified type.
222 #define ASSERT_VALID_OBJ(_t, _o) do { \
223 ASSERT_VALID_PTR((_o)); \
224 ASSERT(dynamic_cast<_t>((_o)) != NULL); \
228 * \name Debug object creation and destruction.
230 * These macros help track some kinds of leaks in C++ programs.
231 * Usage is as follows:
236 * DECLARE_INSTANCE_TRACKING(Foo)
246 * DELETE_INSTANCE(Foo);
251 * // Put this in the implementation file of the class
252 * IMPLEMENT_INSTANCE_TRACKING(Foo)
257 * Foo *foo = new Foo;
258 * cout << GET_INSTANCE_COUNT(Foo) << endl; // prints "1"
260 * ASSERT_ZERO_INSTANCES(Foo); // OK
265 #define NEW_INSTANCE(CLASS) do { ++CLASS::__instances } while (0)
266 #define DELETE_INSTANCE(CLASS) do { --CLASS::__instances } while (0)
267 #define ASSERT_ZERO_INSTANCES(CLASS) ASSERT(CLASS::__instances == 0)
268 #define GET_INSTANCE_COUNT(CLASS) (CLASS::__instances)
269 #define DECLARE_INSTANCE_TRACKING(CLASS) static int __instances
270 #define IMPLEMENT_INSTANCE_TRACKING(CLASS) int CLASS::__instances = 0
276 * On UNIX systems the extabilished practice is to define
277 * NDEBUG for release builds and nothing for debug builds.
283 #define DB(x) /* nothing */
285 #define ASSERT(x) ((void)0)
287 #define ASSERT2(x, help) ((void)0)
288 #define IS_VALID_PTR(p) (1)
289 #define ASSERT_VALID_PTR(p) ((void)0)
290 #define ASSERT_VALID_PTR_OR_NULL(p) ((void)0)
291 #define ASSERT_VALID_OBJ(_t, _o) ((void)0)
292 #define TRACE do {} while (0)
293 #if COMPILER_VARIADIC_MACROS
294 #define TRACEMSG(x, ...) do {} while (0)
296 INLINE void TRACEMSG(UNUSED_ARG(const char *, msg), ...)
302 #define NEW_INSTANCE(CLASS) do {} while (0)
303 #define DELETE_INSTANCE(CLASS) do {} while (0)
304 #define ASSERT_ZERO_INSTANCES(CLASS) do {} while (0)
305 #define GET_INSTANCE_COUNT(CLASS) ERROR_ONLY_FOR_DEBUG
306 #define DECLARE_INSTANCE_TRACKING(CLASS)
307 #define IMPLEMENT_INSTANCE_TRACKING(CLASS)
309 INLINE void kdbg_init(void) { /* nop */ }
310 INLINE void kputchar(UNUSED_ARG(char, c)) { /* nop */ }
311 INLINE int kputnum(UNUSED_ARG(int, num)) { return 0; }
312 INLINE void kputs(UNUSED_ARG(const char *, str)) { /* nop */ }
313 INLINE void kdump(UNUSED_ARG(const void *, buf), UNUSED_ARG(size_t, len)) { /* nop */ }
315 #if defined(__cplusplus) && COMPILER_VARIADIC_MACROS
316 /* G++ can't inline functions with variable arguments... */
317 #define kprintf(fmt,...) do { (void)(fmt); } while(0)
319 /* ...but GCC can. */
320 INLINE void kprintf(UNUSED_ARG(const char *, fmt), ...) { /* nop */ }
325 #if CONFIG_KDEBUG_WALLS
327 * \name Walls to detect data corruption
331 #define WALL_VALUE (long)0xABADCAFEL
332 #define DECLARE_WALL(name,size) long name[(size) / sizeof(long)];
333 #define FWD_DECLARE_WALL(name,size) extern long name[(size) / sizeof(long)];
334 #define INIT_WALL(name) __init_wall((name), countof(name))
335 #define CHECK_WALL(name) __check_wall((name), countof(name), #name, THIS_FILE, __LINE__)
338 #define DECLARE_WALL(name, size) /* nothing */
339 #define FWD_DECLARE_WALL(name, size) /* nothing */
340 #define INIT_WALL(name) do {} while (0)
341 #define CHECK_WALL(name) do {} while (0)
344 /** \} */ // defgroup debug
346 #endif /* BERTOS_DEBUG_H */