mango/kernel/panic.c

#include <mango/cpu.h>
#include <mango/libc/stdio.h>
#include <mango/machine/panic.h>
#include <mango/printk.h>
#include <mango/sched.h>
#include <stdarg.h>

static int has_panicked = 0;

void panic_irq(struct ml_cpu_context *ctx, const char *fmt, ...)
{
	char buf[512];
	va_list args;
	va_start(args, fmt);
	vsnprintf(buf, sizeof(buf), fmt, args);
	va_end(args);

	printk("---[ kernel panic: %s", buf);
	printk("kernel: " BUILD_ID ", compiler version: " __VERSION__);

	struct task *task = current_task();
	struct thread *thr = current_thread();

	if (task && thr) {
		printk("task: %s (id: %d, thread: %d)",
		       task->t_name,
		       task->t_id,
		       thr->tr_id);
	} else {
		printk("task: [bootstrap]");
	}

	printk("cpu: %u", this_cpu());

	ml_print_cpu_state(ctx);

	if (READ_ONCE(has_panicked)) {
		ml_halt_cpu();
	}

	WRITE_ONCE(has_panicked, 1);

	if (ctx) {
		ml_print_stack_trace_irq(ctx);
	} else {
		uintptr_t ip = (uintptr_t)__builtin_return_address(0);
		ml_print_stack_trace(ip);
	}

	printk("---[ end kernel panic: %s", buf);
	ml_halt_cpu();
}