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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 (c) 1988-1993 The Regents of the University of California.
* Copyright (c) 1994 Sun Microsystems, Inc.
* Copyright (c) 1998-1999 by 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 TCL_NORETURN void tclWinDebugPanic(const char *format, ...);
#endif
/*
* The panicProc variable contains a pointer to an application specific panic
* procedure.
*/
#if defined(__CYGWIN__)
static Tcl_PanicProc *panicProc = tclWinDebugPanic;
#else
static Tcl_PanicProc *panicProc = NULL;
#endif
/*
*----------------------------------------------------------------------
*
* Tcl_SetPanicProc --
*
* Replace the default panic behavior with the specified function.
*
* Results:
* None.
*
* Side effects:
* Sets the panicProc variable.
*
*----------------------------------------------------------------------
*/
void
Tcl_SetPanicProc(
TCL_NORETURN1 Tcl_PanicProc *proc)
{
#if defined(_WIN32)
/* tclWinDebugPanic only installs if there is no panicProc yet. */
if ((proc != tclWinDebugPanic) || (panicProc == NULL))
#elif defined(__CYGWIN__)
if (proc == NULL)
panicProc = tclWinDebugPanic;
else
#endif
panicProc = proc;
}
/*
*----------------------------------------------------------------------
*
* Tcl_PanicVA --
*
* Print an error message and kill the process.
*
* Results:
* None.
*
* Side effects:
* The process dies, entering the debugger if possible.
*
*----------------------------------------------------------------------
*/
TCL_NORETURN void
Tcl_PanicVA(
const char *format, /* Format string, suitable for passing to
* fprintf. */
va_list argList) /* Variable argument list. */
{
char *arg1, *arg2, *arg3; /* Additional arguments (variable in number)
* to pass to fprintf. */
char *arg4, *arg5, *arg6, *arg7, *arg8;
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 *);
if (panicProc != NULL) {
panicProc(format, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8);
#ifdef _WIN32
} else if (IsDebuggerPresent()) {
tclWinDebugPanic(format, arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8);
#endif
} else {
fprintf(stderr, format, arg1, arg2, arg3, arg4, arg5, arg6, arg7,
arg8);
fprintf(stderr, "\n");
fflush(stderr);
}
#if defined(_WIN32) || defined(__CYGWIN__)
#if defined(__GNUC__)
__builtin_trap();
#elif defined(_WIN64)
__debugbreak();
#elif defined(_MSC_VER) && defined (_M_IX86)
_asm {int 3}
#else
DebugBreak();
#endif
#endif
#if defined(_WIN32)
ExitProcess(1);
#else
abort();
#endif
}
/*
*----------------------------------------------------------------------
*
* Tcl_Panic --
*
* Print an error message and kill the process.
*
* Results:
* None.
*
* Side effects:
* The process dies, entering the debugger if possible.
*
*----------------------------------------------------------------------
*/
/* ARGSUSED */
/*
* 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] */
TCL_NORETURN void
Tcl_Panic(
const char *format,
...)
{
va_list argList;
va_start(argList, format);
Tcl_PanicVA(format, argList);
}
/*
* Local Variables:
* mode: c
* c-basic-offset: 4
* fill-column: 78
* End:
*/
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