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/*
* tclPanic.c --
*
* Source code for the "Tcl_Panic" library procedure for Tcl; individual
* applications will probably call Tcl_SetPanicProc() to set an
* application-specific panic procedure.
*
* Copyright © 1988-1993 The Regents of the University of California.
* Copyright © 1994 Sun Microsystems, Inc.
* Copyright © 1998-1999 Scriptics Corporation.
*
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*/
#include "tclInt.h"
#if defined(_WIN32) || defined(__CYGWIN__)
MODULE_SCOPE void tclWinDebugPanic(const char *format, ...);
#endif
/*
* The panicProc variable contains a pointer to an application specific panic
* procedure.
*/
static TCL_NORETURN1 Tcl_PanicProc *panicProc = NULL;
/*
*----------------------------------------------------------------------
*
* Tcl_SetPanicProc --
*
* Replace the default panic behavior with the specified function.
*
* Results:
* None.
*
* Side effects:
* Sets the panicProc variable.
*
*----------------------------------------------------------------------
*/
const char *
Tcl_SetPanicProc(
TCL_NORETURN1 Tcl_PanicProc *proc)
{
panicProc = proc;
return Tcl_InitSubsystems();
}
/*
*----------------------------------------------------------------------
*
* Tcl_Panic --
*
* Print an error message and kill the process.
*
* Results:
* None.
*
* Side effects:
* The process dies, entering the debugger if possible.
*
*----------------------------------------------------------------------
*/
/*
* The following comment is here so that Coverity's static analyzer knows that
* a Tcl_Panic() call can never return and avoids lots of false positives.
*/
/* coverity[+kill] */
void
Tcl_Panic(
const char *format,
...)
{
va_list argList;
char *arg1, *arg2, *arg3; /* Additional arguments (variable in number)
* to pass to fprintf. */
char *arg4, *arg5, *arg6, *arg7, *arg8;
va_start(argList, format);
arg1 = va_arg(argList, char *);
arg2 = va_arg(argList, char *);
arg3 = va_arg(argList, char *);
arg4 = va_arg(argList, char *);
arg5 = va_arg(argList, char *);
arg6 = va_arg(argList, char *);
arg7 = va_arg(argList, char *);
arg8 = va_arg(argList, char *);
va_end (argList);
if (panicProc != NULL) {
panicProc(format, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8);
} else {
#if defined(_WIN32) || defined(__CYGWIN__)
tclWinDebugPanic(format, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8);
#else
fprintf(stderr, format, arg1, arg2, arg3, arg4, arg5, arg6, arg7,
arg8);
fprintf(stderr, "\n");
fflush(stderr);
#endif
# if defined(__GNUC__)
__builtin_trap();
# elif defined(_WIN64)
__debugbreak();
# elif defined(_MSC_VER) && defined (_M_IX86)
_asm {int 3}
# elif defined(_WIN32)
DebugBreak();
# endif
#if defined(_WIN32)
ExitProcess(1);
#else
abort();
#endif
}
}
/*
* Local Variables:
* mode: c
* c-basic-offset: 4
* fill-column: 78
* End:
*/
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