336 lines
11 KiB
C
336 lines
11 KiB
C
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/***
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*assert.c - Display a message and abort
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*
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* Copyright (c) 1988-2001, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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*
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*Revision History:
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* 05-19-88 JCR Module created.
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* 08-10-88 PHG Corrected copyright date
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* 03-14-90 GJF Replaced _LOAD_DS with _CALLTYPE1 and added #include
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* <cruntime.h>. Also, fixed the copyright.
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* 04-05-90 GJF Added #include <assert.h>
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* 10-04-90 GJF New-style function declarator.
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* 06-19-91 GJF Conditionally use setvbuf() on stderr to prevent
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* the implicit call to malloc() if stderr is being used
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* for the first time (assert() should work even if the
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* heap is trashed).
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* 01-25-92 RID Mac module created from x86 version
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* 04-06-93 SKS Replace _CRTAPI* with __cdecl
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* 09-06-94 GJF Substantially revised to use MessageBox for GUI apps.
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* 02-15-95 CFW Make all CRT message boxes look alike.
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* 02-16-95 JWM Spliced _WIN32 & Mac versions.
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* 02-24-95 CFW Use __crtMessageBoxA.
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* 02-27-95 CFW Change debug break scheme, change __crtMBoxA params.
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* 03-29-95 BWT Fix posix build by adding _exit prototype.
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* 06-06-95 CFW Remove _MB_SERVICE_NOTIFICATION.
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* 10-17-96 GJF Thou shalt not scribble on the caller's filename
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* string! Also, fixed miscount of double newline.
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* 05-17-99 PML Remove all Macintosh support.
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* 10-20-99 GB Fix dotdotdot for filename. VS7#4731
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* 03-28-01 PML Protect against GetModuleFileName overflow (vs7#231284)
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*
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*******************************************************************************/
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#include <cruntime.h>
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#include <windows.h>
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#include <file2.h>
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#include <internal.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <signal.h>
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#include <awint.h>
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#ifdef NDEBUG
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#undef NDEBUG
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#endif
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#define _ASSERT_OK
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#include <assert.h>
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#ifdef _POSIX_
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_CRTIMP void __cdecl _exit(int);
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#endif
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/*
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* assertion format string for use with output to stderr
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*/
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static char _assertstring[] = "Assertion failed: %s, file %s, line %d\n";
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/* Format of MessageBox for assertions:
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*
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* ================= Microsft Visual C++ Debug Library ================
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*
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* Assertion Failed!
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*
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* Program: c:\test\mytest\foo.exe
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* File: c:\test\mytest\bar.c
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* Line: 69
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*
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* Expression: <expression>
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*
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* For information on how your program can cause an assertion
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* failure, see the Visual C++ documentation on asserts
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*
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* (Press Retry to debug the application - JIT must be enabled)
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*
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* ===================================================================
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*/
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/*
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* assertion string components for message box
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*/
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#define BOXINTRO "Assertion failed!"
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#define PROGINTRO "Program: "
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#define FILEINTRO "File: "
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#define LINEINTRO "Line: "
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#define EXPRINTRO "Expression: "
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#define INFOINTRO "For information on how your program can cause an assertion\n" \
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"failure, see the Visual C++ documentation on asserts"
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#define HELPINTRO "(Press Retry to debug the application - JIT must be enabled)"
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static char * dotdotdot = "...";
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static char * newline = "\n";
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static char * dblnewline = "\n\n";
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#define DOTDOTDOTSZ 3
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#define NEWLINESZ 1
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#define DBLNEWLINESZ 2
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#define MAXLINELEN 60 /* max length for line in message box */
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#define ASSERTBUFSZ (MAXLINELEN * 9) /* 9 lines in message box */
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#if defined(_M_IX86)
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#define _DbgBreak() __asm { int 3 }
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#elif defined(_M_ALPHA)
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void _BPT();
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#pragma intrinsic(_BPT)
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#define _DbgBreak() _BPT()
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#elif defined(_M_IA64)
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void __break(int);
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#pragma intrinsic (__break)
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#define _DbgBreak() __break(0x80016)
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#else
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#define _DbgBreak() DebugBreak()
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#endif
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/***
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*_assert() - Display a message and abort
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*
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*Purpose:
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* The assert macro calls this routine if the assert expression is
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* true. By placing the assert code in a subroutine instead of within
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* the body of the macro, programs that call assert multiple times will
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* save space.
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*
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*Entry:
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*
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*Exit:
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*
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*Exceptions:
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*
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*******************************************************************************/
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void __cdecl _assert (
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void *expr,
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void *filename,
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unsigned lineno
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)
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{
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/*
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* Build the assertion message, then write it out. The exact form
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* depends on whether it is to be written out via stderr or the
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* MessageBox API.
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*/
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if ( (__error_mode == _OUT_TO_STDERR) || ((__error_mode ==
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_OUT_TO_DEFAULT) && (__app_type == _CONSOLE_APP)) )
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{
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/*
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* Build message and write it out to stderr. It will be of the
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* form:
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* Assertion failed: <expr>, file <filename>, line <lineno>
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*/
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if ( !anybuf(stderr) )
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/*
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* stderr is unused, hence unbuffered, as yet. set it to
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* single character buffering (to avoid a malloc() of a
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* stream buffer).
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*/
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(void) setvbuf(stderr, NULL, _IONBF, 0);
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fprintf(stderr, _assertstring, expr, filename, lineno);
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fflush(stderr);
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}
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else {
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int nCode;
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char * pch;
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char assertbuf[ASSERTBUFSZ];
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char progname[MAX_PATH + 1];
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/*
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* Line 1: box intro line
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*/
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strcpy( assertbuf, BOXINTRO );
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strcat( assertbuf, dblnewline );
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/*
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* Line 2: program line
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*/
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strcat( assertbuf, PROGINTRO );
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progname[MAX_PATH] = '\0';
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if ( !GetModuleFileName( NULL, progname, MAX_PATH ))
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strcpy( progname, "<program name unknown>");
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pch = (char *)progname;
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/* sizeof(PROGINTRO) includes the NULL terminator */
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if ( sizeof(PROGINTRO) + strlen(progname) + NEWLINESZ > MAXLINELEN )
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{
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pch += (sizeof(PROGINTRO) + strlen(progname) + NEWLINESZ) - MAXLINELEN;
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strncpy( pch, dotdotdot, DOTDOTDOTSZ );
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}
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strcat( assertbuf, pch );
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strcat( assertbuf, newline );
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/*
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* Line 3: file line
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*/
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strcat( assertbuf, FILEINTRO );
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/* sizeof(FILEINTRO) includes the NULL terminator */
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if ( sizeof(FILEINTRO) + strlen(filename) + NEWLINESZ > MAXLINELEN )
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{
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size_t p, len, ffn;
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pch = (char *) filename;
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ffn = MAXLINELEN - sizeof(FILEINTRO) - NEWLINESZ;
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for ( len = strlen(filename), p = 1;
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pch[len - p] != '\\' && pch[len - p] != '/' && p < len;
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p++ );
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/* keeping pathname almost 2/3rd of full filename and rest
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* is filename
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*/
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if ( (ffn - ffn/3) < (len - p) && ffn/3 > p )
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{
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/* too long. using first part of path and the
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filename string */
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strncat( assertbuf, pch, ffn - DOTDOTDOTSZ - p );
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strcat( assertbuf, dotdotdot );
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strcat( assertbuf, pch + len - p );
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}
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else if ( ffn - ffn/3 > len - p )
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{
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/* pathname is smaller. keeping full pathname and putting
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* dotdotdot in the middle of filename
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*/
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p = p/2;
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strncat( assertbuf, pch, ffn - DOTDOTDOTSZ - p );
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strcat( assertbuf, dotdotdot );
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strcat( assertbuf, pch + len - p );
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}
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else
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{
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/* both are long. using first part of path. using first and
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* last part of filename.
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*/
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strncat( assertbuf, pch, ffn - ffn/3 - DOTDOTDOTSZ );
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strcat( assertbuf, dotdotdot );
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strncat( assertbuf, pch + len - p, ffn/6 - 1 );
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strcat( assertbuf, dotdotdot );
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strcat( assertbuf, pch + len - (ffn/3 - ffn/6 - 2) );
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}
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}
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else
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/* plenty of room on the line, just append the filename */
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strcat( assertbuf, filename );
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strcat( assertbuf, newline );
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/*
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* Line 4: line line
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*/
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strcat( assertbuf, LINEINTRO );
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_itoa( lineno, assertbuf + strlen(assertbuf), 10 );
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strcat( assertbuf, dblnewline );
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/*
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* Line 5: message line
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*/
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strcat( assertbuf, EXPRINTRO );
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/* sizeof(HELPINTRO) includes the NULL terminator */
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if ( strlen(assertbuf) +
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strlen(expr) +
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2*DBLNEWLINESZ +
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sizeof(INFOINTRO)-1 +
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sizeof(HELPINTRO) > ASSERTBUFSZ )
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{
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strncat( assertbuf, expr,
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ASSERTBUFSZ -
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(strlen(assertbuf) +
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DOTDOTDOTSZ +
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2*DBLNEWLINESZ +
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sizeof(INFOINTRO)-1 +
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sizeof(HELPINTRO)) );
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strcat( assertbuf, dotdotdot );
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}
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else
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strcat( assertbuf, expr );
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strcat( assertbuf, dblnewline );
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/*
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* Line 6, 7: info line
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*/
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strcat(assertbuf, INFOINTRO);
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strcat( assertbuf, dblnewline );
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/*
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* Line 8: help line
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*/
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strcat(assertbuf, HELPINTRO);
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/*
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* Write out via MessageBox
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*/
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nCode = __crtMessageBoxA(assertbuf,
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"Microsoft Visual C++ Runtime Library",
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MB_ABORTRETRYIGNORE|MB_ICONHAND|MB_SETFOREGROUND|MB_TASKMODAL);
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/* Abort: abort the program */
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if (nCode == IDABORT)
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{
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/* raise abort signal */
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raise(SIGABRT);
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/* We usually won't get here, but it's possible that
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SIGABRT was ignored. So exit the program anyway. */
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_exit(3);
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}
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/* Retry: call the debugger */
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if (nCode == IDRETRY)
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{
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_DbgBreak();
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/* return to user code */
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return;
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}
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/* Ignore: continue execution */
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if (nCode == IDIGNORE)
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return;
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}
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abort();
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}
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