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- /*
- * DI.h - support for invariants (assertions) using the gdb debugger.
- *
- * Copyright (c) 1997 Phil Maker
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * Id: DI.h,v 1.1.1.1 1997/11/23 11:45:50 pjm Exp
- */
-
- #ifndef _DI_h_
- #define _DI_h_ 1
-
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- #ifndef WITHOUT_NANA
-
- /*
- * nana-config.h - the system wide configuration file; we put the ifndef
- * around it to avoid the file 5 million times during a compile.
- */
-
- #ifndef _nana_config_h_
- #include <nana-config.h>
- #endif
-
- /*
- * DI_LEVEL sets the level of invariant analogously to NDEBUG in assert.h
- *
- * DI_LEVEL == 2: invariants are always evaluated.
- * DI_LEVEL == 1: evaluate invariants iff they have a true GUARD.
- * DI_LEVEL == 0: invariants are never evaluated.
- */
-
- #ifndef DI_LEVEL /* define DEFAULT for DI_LEVEL */
- #define DI_LEVEL 1
- #endif
-
-
-
- /*
- * DI_DEFAULT_GUARD - the default guard expression; an invariant is checked
- * iff the guard is true. By default its always true.
- */
-
- #ifndef DI_DEFAULT_GUARD
- #define DI_DEFAULT_GUARD 1
- #endif
-
- /*
- * DI_DEFAULT_PARAMS - the default value to be passed as the second argument
- * to the handler macro when an invariant fails.
- */
-
- #ifndef DI_DEFAULT_PARAMS
- #define DI_DEFAULT_PARAMS /* nothing */
- #endif
-
- /*
- * DI_DEFAULT_HANDLER - called when an error is detected by DI;
- */
-
- #ifndef DI_DEFAULT_HANDLER /* define default handler */
-
- #define DI_DEFAULT_HANDLER(e,f,l,p) \
- @@echo e has failed at f:l with p\n@@ \
- @@where@@ /* stack backtrace */
-
- #endif /* DI_DEFAULT_HANDLER */
-
- /*
- * DI_MAKE_VALID_BREAKPOINT(e) - called whenever we generate a DI breakpoint;
- * the aim is to make sure a breakpoint can be set at the current location
- * and that any expressions will be evaluated by gdb correctly.
- * This is the portable default; an architecture specific version
- * is generated by the configure script into nana-config.h
- */
-
- #ifndef DI_MAKE_VALID_BREAKPOINT
- static volatile int _di_target;
-
- #define DI_MAKE_VALID_BREAKPOINT(e) _di_target = 0
- #endif
-
- /*
- * _DIGHPS - implements the DI macros, it comes in two variants:
- *
- * ifdefined(_NANA_FILTER_) then we are generating debugger commands
- * else generating C text.
- */
-
- #if DI_LEVEL == 2 /* always check the assertion */
- #ifdef _NANA_FILTER_
- #define _DIGHPS(e,g,h,p,s) \
- @@break @__FILE__:__LINE__@@ \
- @@condition $bpnum (!(e))@@ \
- @@command $bpnum@@ \
- @@silent@@ \
- h(s,f,l,p) \
- @@end@@
- #else
- #define _DIGHPS(e,g,h,p,s) DI_MAKE_VALID_BREAKPOINT(e)
- #endif /* _NANA_FILTER_ */
-
- #elif DI_LEVEL == 1 /* check it iff g is true */
-
- #ifdef _NANA_FILTER_
- #define _DIGHPS(e,g,h,p,s) \
- @@break @__FILE__:__LINE__@@ \
- @@condition $bpnum (g) && (!(e))@@ \
- @@command $bpnum@@ \
- @@silent@@ \
- h(s,f,l,p) \
- @@end@@
- #else
- #define _DIGHPS(e,g,h,p,s) DI_MAKE_VALID_BREAKPOINT(e)
- #endif /* _NANA_FILTER_ */
-
- #elif DI_LEVEL == 0 /* no assertions so just remove them */
- #define _DIGHPS(e,g,h,p,s) /* nothing */
- #endif /* DI_LEVEL */
-
-
- /*
- * DSG(e,g), DS(e) - are used to set variables in the debugger from
- * within C programs. These convenience variables can then be
- * used in invariants later on to refer to the previous state
- * of the program.
- *
- * DS($x = x); ....; DI($x + 10 == x);
- */
-
- #if DI_LEVEL == 2
- #ifdef _NANA_FILTER_
- #define DSG(e,g) \
- @@break @__FILE__:__LINE__@@ \
- @@command@@ \
- @@silent@@ \
- @@set e@@ \
- @@cont@@ \
- @@end@@
- #else
- #define DSG(e,g) DI_MAKE_VALID_BREAKPOINT(e)
- #endif
-
- #elif DI_LEVEL == 1
- #ifdef _NANA_FILTER_
- #define DSG(e,g) \
- @@break @__FILE__:__LINE__ if g@@ \
- @@command@@ \
- @@silent@@ \
- @@set e@@ \
- @@cont@@ \
- @@end@@
- #else
- #define DSG(e,g) DI_MAKE_VALID_BREAKPOINT(e)
- #endif /* _NANA_FILTER_ */
-
- #elif DI_LEVEL == 0
- #define DSG(e,g) /* nothing */
- #else
- error DI_LEVEL should be 0 or 1 or 2
- #endif
-
- #define DS(e) DSG(e,DI_DEFAULT_GUARD)
-
- /*
- * And all the user macros; these are used to put in the default arguments.
- * The name is used to determine the arguments; e.g. DIGH takes an expression
- * to check; a guard and a handler as parameters. The letters in the names
- * are in ascending order (i.e. DIGH(...) not DIHG(...)).
- *
- * DI[G][H][P] - it must be true (e) with an optional guard, handler and
- * parameter for the handler.
- * DN[G][H][P] - as for DI... except that (e) must never ever be true.
- */
-
- #define DI(e) \
- _DIGHPS(e,DI_DEFAULT_GUARD,DI_DEFAULT_HANDLER,DI_DEFAULT_PARAMS,"DI("#e")")
- #define DIG(e,g) \
- _DIGHPS(e,g,DI_DEFAULT_HANDLER,DI_DEFAULT_PARAMS,"DI("#e")")
- #define DIH(e,h) \
- _DIGHPS(e,DI_DEFAULT_GUARD,h,DI_DEFAULT_PARAMS,"DI("#e")")
- #define DIP(e,p) \
- _DIGHPS(e,DI_DEFAULT_GUARD,DI_DEFAULT_HANDLER,p,"DI("#e")")
- #define DIGH(e,g,h) \
- _DIGHPS(e,g,h,DI_DEFAULT_PARAMS,"DI("#e")")
- #define DIGP(e,g,p) \
- _DIGHPS(e,g,DI_DEFAULT_HANDLER,p,"DI("#e")")
- #define DIHP(e,h,p) \
- _DIGHPS(e,DI_DEFAULT_GUARD,h,p,"DI("#e")")
- #define DIGHP(e,g,h,p) \
- _DIGHPS(e,g,h,p,"DI("#e")")
-
- #define DN(e) \
- _DIGHPS((!(e)),DI_DEFAULT_GUARD,DI_DEFAULT_HANDLER,DI_DEFAULT_PARAMS,"DN("#e")")
- #define DNG(e,g) \
- _DIGHPS((!(e)),g,DI_DEFAULT_HANDLER,DI_DEFAULT_PARAMS,"DN("#e")")
- #define DNH(e,h) \
- _DIGHPS((!(e)),DI_DEFAULT_GUARD,h,DI_DEFAULT_PARAMS,"DN("#e")")
- #define DNP(e,p) \
- _DIGHPS((!(e)),DI_DEFAULT_GUARD,DI_DEFAULT_HANDLER,p,"DN("#e")")
- #define DNGH(e,g,h) \
- _DIGHPS((!(e)),g,h,DI_DEFAULT_PARAMS,"DN("#e")")
- #define DNGP(e,g,p) \
- _DIGHPS((!(e)),g,DI_DEFAULT_HANDLER,p,"DN("#e")")
- #define DNHP(e,h,p) \
- _DIGHPS((!(e)),DI_DEFAULT_GUARD,h,p,"DN("#e")")
- #define DNGHP(e,g,h,p) \
- _DIGHPS((!(e)),g,h,p,"DN("#e")")
-
- #else /* defined(WITHOUT_NANA) */
-
- #define DI(e) /* empty */
- #define DIG(e,g) /* empty */
- #define DIH(e,h) /* empty */
- #define DIP(e,p) /* empty */
- #define DIGH(e,g,h) /* empty */
- #define DIGP(e,g,p) /* empty */
- #define DIHP(e,h,p) /* empty */
- #define DIGHP(e,g,h,p) /* empty */
-
- #define DN(e) /* empty */
- #define DNG(e,g) /* empty */
- #define DNH(e,h) /* empty */
- #define DNP(e,p) /* empty */
- #define DNGH(e,g,h) /* empty */
- #define DNGP(e,g,p) /* empty */
- #define DNHP(e,h,p) /* empty */
- #define DNGHP(e,g,h,p) /* empty */
-
- #define DS(e) /* empty */
- #define DSG(e,g) /* empty */
-
-
- #endif /* !defined(WITHOUT_NANA) */
- #ifdef __cplusplus
- }
- #endif
-
- #endif /* _DI_h_ */
-
-
-
-