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/**************************************************************************
*
* Copyright 2008 VMware, Inc.
* All Rights Reserved.
*
* 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, sub license, 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 (including the
* next paragraph) 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 NON-INFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS 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.
*
**************************************************************************/
/**
* @file
* Cross-platform debugging helpers.
*
* For now it just has assert and printf replacements, but it might be extended
* with stack trace reports and more advanced logging in the near future.
*
* @author Jose Fonseca <jfonseca@vmware.com>
*/
#ifndef U_DEBUG_H_
#define U_DEBUG_H_
#include <stdarg.h>
#include <string.h>
#include "util/os_misc.h"
#include "util/detect_os.h"
#include "util/macros.h"
#if DETECT_OS_HAIKU
/* Haiku provides debug_printf in libroot with OS.h */
#include <OS.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
#if defined(__GNUC__)
#define _util_printf_format(fmt, list) __attribute__ ((format (printf, fmt, list)))
#else
#define _util_printf_format(fmt, list)
#endif
void _debug_vprintf(const char *format, va_list ap);
static inline void
_debug_printf(const char *format, ...)
{
va_list ap;
va_start(ap, format);
_debug_vprintf(format, ap);
va_end(ap);
}
/**
* Print debug messages.
*
* The actual channel used to output debug message is platform specific. To
* avoid misformating or truncation, follow these rules of thumb:
* - output whole lines
* - avoid outputing large strings (512 bytes is the current maximum length
* that is guaranteed to be printed in all platforms)
*/
#if !DETECT_OS_HAIKU
static inline void
debug_printf(const char *format, ...) _util_printf_format(1,2);
static inline void
debug_printf(const char *format, ...)
{
#ifdef DEBUG
va_list ap;
va_start(ap, format);
_debug_vprintf(format, ap);
va_end(ap);
#else
(void) format; /* silence warning */
#endif
}
#endif
/*
* ... isn't portable so we need to pass arguments in parentheses.
*
* usage:
* debug_printf_once(("answer: %i\n", 42));
*/
#define debug_printf_once(args) \
do { \
static bool once = true; \
if (once) { \
once = false; \
debug_printf args; \
} \
} while (0)
#ifdef DEBUG
#define debug_vprintf(_format, _ap) _debug_vprintf(_format, _ap)
#else
#define debug_vprintf(_format, _ap) ((void)0)
#endif
#ifdef DEBUG
/**
* Dump a blob in hex to the same place that debug_printf sends its
* messages.
*/
void debug_print_blob( const char *name, const void *blob, unsigned size );
#else
#define debug_print_blob(_name, _blob, _size) ((void)0)
#endif
/**
* Disable interactive error message boxes.
*
* Should be called as soon as possible for effectiveness.
*/
void
debug_disable_error_message_boxes(void);
/**
* Hard-coded breakpoint.
*/
#ifdef DEBUG
#define debug_break() os_break()
#else /* !DEBUG */
#define debug_break() ((void)0)
#endif /* !DEBUG */
long
debug_get_num_option(const char *name, long dfault);
#ifdef _MSC_VER
__declspec(noreturn)
#endif
void _debug_assert_fail(const char *expr,
const char *file,
unsigned line,
const char *function)
#if defined(__GNUC__) && !defined(DEBUG)
__attribute__((noreturn))
#endif
;
/**
* Assert macro
*
* Do not expect that the assert call terminates -- errors must be handled
* regardless of assert behavior.
*
* For non debug builds the assert macro will expand to a no-op, so do not
* call functions with side effects in the assert expression.
*/
#ifndef NDEBUG
#define debug_assert(expr) ((expr) ? (void)0 : _debug_assert_fail(#expr, __FILE__, __LINE__, __FUNCTION__))
#else
#define debug_assert(expr) (void)(0 && (expr))
#endif
/** Override standard assert macro */
#ifdef assert
#undef assert
#endif
#define assert(expr) debug_assert(expr)
/**
* Output the current function name.
*/
#ifdef DEBUG
#define debug_checkpoint() \
_debug_printf("%s\n", __FUNCTION__)
#else
#define debug_checkpoint() \
((void)0)
#endif
/**
* Output the full source code position.
*/
#ifdef DEBUG
#define debug_checkpoint_full() \
_debug_printf("%s:%u:%s\n", __FILE__, __LINE__, __FUNCTION__)
#else
#define debug_checkpoint_full() \
((void)0)
#endif
/**
* Output a warning message. Muted on release version.
*/
#ifdef DEBUG
#define debug_warning(__msg) \
_debug_printf("%s:%u:%s: warning: %s\n", __FILE__, __LINE__, __FUNCTION__, __msg)
#else
#define debug_warning(__msg) \
((void)0)
#endif
/**
* Emit a warning message, but only once.
*/
#ifdef DEBUG
#define debug_warn_once(__msg) \
do { \
static bool warned = false; \
if (!warned) { \
_debug_printf("%s:%u:%s: one time warning: %s\n", \
__FILE__, __LINE__, __FUNCTION__, __msg); \
warned = true; \
} \
} while (0)
#else
#define debug_warn_once(__msg) \
((void)0)
#endif
/**
* Output an error message. Not muted on release version.
*/
#ifdef DEBUG
#define debug_error(__msg) \
_debug_printf("%s:%u:%s: error: %s\n", __FILE__, __LINE__, __FUNCTION__, __msg)
#else
#define debug_error(__msg) \
_debug_printf("error: %s\n", __msg)
#endif
/**
* Output a debug log message to the debug info callback.
*/
#define pipe_debug_message(cb, type, fmt, ...) do { \
static unsigned id = 0; \
if ((cb) && (cb)->debug_message) { \
_pipe_debug_message(cb, &id, \
PIPE_DEBUG_TYPE_ ## type, \
fmt, ##__VA_ARGS__); \
} \
} while (0)
struct pipe_debug_callback;
void
_pipe_debug_message(
struct pipe_debug_callback *cb,
unsigned *id,
enum pipe_debug_type type,
const char *fmt, ...) _util_printf_format(4, 5);
/**
* Used by debug_dump_enum and debug_dump_flags to describe symbols.
*/
struct debug_named_value
{
const char *name;
uint64_t value;
const char *desc;
};
/**
* Some C pre-processor magic to simplify creating named values.
*
* Example:
* @code
* static const debug_named_value my_names[] = {
* DEBUG_NAMED_VALUE(MY_ENUM_VALUE_X),
* DEBUG_NAMED_VALUE(MY_ENUM_VALUE_Y),
* DEBUG_NAMED_VALUE(MY_ENUM_VALUE_Z),
* DEBUG_NAMED_VALUE_END
* };
*
* ...
* debug_printf("%s = %s\n",
* name,
* debug_dump_enum(my_names, my_value));
* ...
* @endcode
*/
#define DEBUG_NAMED_VALUE(__symbol) {#__symbol, (unsigned long)__symbol, NULL}
#define DEBUG_NAMED_VALUE_WITH_DESCRIPTION(__symbol, __desc) {#__symbol, (unsigned long)__symbol, __desc}
#define DEBUG_NAMED_VALUE_END {NULL, 0, NULL}
/**
* Convert a enum value to a string.
*/
const char *
debug_dump_enum(const struct debug_named_value *names,
unsigned long value);
const char *
debug_dump_enum_noprefix(const struct debug_named_value *names,
const char *prefix,
unsigned long value);
/**
* Convert binary flags value to a string.
*/
const char *
debug_dump_flags(const struct debug_named_value *names,
unsigned long value);
/**
* Function enter exit loggers
*/
#ifdef DEBUG
int debug_funclog_enter(const char* f, const int line, const char* file);
void debug_funclog_exit(const char* f, const int line, const char* file);
void debug_funclog_enter_exit(const char* f, const int line, const char* file);
#define DEBUG_FUNCLOG_ENTER() \
int __debug_decleration_work_around = \
debug_funclog_enter(__FUNCTION__, __LINE__, __FILE__)
#define DEBUG_FUNCLOG_EXIT() \
do { \
(void)__debug_decleration_work_around; \
debug_funclog_exit(__FUNCTION__, __LINE__, __FILE__); \
return; \
} while(0)
#define DEBUG_FUNCLOG_EXIT_RET(ret) \
do { \
(void)__debug_decleration_work_around; \
debug_funclog_exit(__FUNCTION__, __LINE__, __FILE__); \
return ret; \
} while(0)
#define DEBUG_FUNCLOG_ENTER_EXIT() \
debug_funclog_enter_exit(__FUNCTION__, __LINE__, __FILE__)
#else
#define DEBUG_FUNCLOG_ENTER() \
int __debug_decleration_work_around
#define DEBUG_FUNCLOG_EXIT() \
do { (void)__debug_decleration_work_around; return; } while(0)
#define DEBUG_FUNCLOG_EXIT_RET(ret) \
do { (void)__debug_decleration_work_around; return ret; } while(0)
#define DEBUG_FUNCLOG_ENTER_EXIT()
#endif
/**
* Get option.
*
* It is an alias for getenv on Linux.
*
* On Windows it reads C:\gallium.cfg, which is a text file with CR+LF line
* endings with one option per line as
*
* NAME=value
*
* This file must be terminated with an extra empty line.
*/
const char *
debug_get_option(const char *name, const char *dfault);
bool
debug_get_bool_option(const char *name, bool dfault);
long
debug_get_num_option(const char *name, long dfault);
uint64_t
debug_get_flags_option(const char *name,
const struct debug_named_value *flags,
uint64_t dfault);
#define DEBUG_GET_ONCE_OPTION(suffix, name, dfault) \
static const char * \
debug_get_option_ ## suffix (void) \
{ \
static bool first = true; \
static const char * value; \
if (first) { \
first = false; \
value = debug_get_option(name, dfault); \
} \
return value; \
}
#define DEBUG_GET_ONCE_BOOL_OPTION(sufix, name, dfault) \
static bool \
debug_get_option_ ## sufix (void) \
{ \
static bool first = true; \
static bool value; \
if (first) { \
first = false; \
value = debug_get_bool_option(name, dfault); \
} \
return value; \
}
#define DEBUG_GET_ONCE_NUM_OPTION(sufix, name, dfault) \
static long \
debug_get_option_ ## sufix (void) \
{ \
static bool first = true; \
static long value; \
if (first) { \
first = false; \
value = debug_get_num_option(name, dfault); \
} \
return value; \
}
#define DEBUG_GET_ONCE_FLAGS_OPTION(sufix, name, flags, dfault) \
static unsigned long \
debug_get_option_ ## sufix (void) \
{ \
static bool first = true; \
static unsigned long value; \
if (first) { \
first = false; \
value = debug_get_flags_option(name, flags, dfault); \
} \
return value; \
}
#ifdef __cplusplus
}
#endif
#endif /* U_DEBUG_H_ */