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os-k/kaleid/kernel/ke/panic.c

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//----------------------------------------------------------------------------//
// GNU GPL OS/K //
// //
// Desc: How NOT to panic 101 //
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// //
// //
// Copyright © 2018-2019 The OS/K Team //
// //
// This file is part of OS/K. //
// //
// OS/K is free software: you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation, either version 3 of the License, or //
// any later version. //
// //
// OS/K is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY//without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
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//----------------------------------------------------------------------------//
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#include <extras/buf.h>
#include <kernel/proc.h>
#include <kernel/iomisc.h>
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error_t vbprintf(Buffer_t *buf, const char *fmt, va_list ap);
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//
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// Failed assert() handler
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//
noreturn void __assert_handler(const char *msg,
const char *file,
int line,
const char *func)
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{
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KeDisableIRQs();
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KeStartPanic("In function '%s', from '%s' line %d\nAssertion failed:\n"
"'%s'", func, file, line, msg);
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}
//
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// Your best boy panic()
// This is CPU local...
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//
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noreturn void KeStartPanic(const char *fmt, ...)
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{
va_list ap;
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KeDisableIRQs();
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PsCurProc = NULL;
if (BStdOut == NULL) KeCrashSystem();
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ExAttemptLock(&BStdOut->lock);
if (fmt == NULL) {
fmt = "(no message given)";
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}
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if (KeIsPanicking) {
bprintf(BStdOut, "\nDouble panic!");
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KeHaltCPU();
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}
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KeIsPanicking = 1;
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// We don't check vbprintf's output
// If it fails, what could we do anyway?
bprintf(BStdOut, "\nPANIC\n");
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va_start(ap, fmt);
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vbprintf(BStdOut, fmt, ap);
va_end(ap);
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bputc(BStdOut, '\n');
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BStdOut->flusher(BStdOut);
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KeHaltCPU();
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}