Function Report

freebsd/kern/kern_ubsan.c:1182–1265

/* Local utility functions */

static void
Report(bool isFatal, const char *pFormat, ...)
{
	va_list ap;

	ASSERT(pFormat);

	va_start(ap, pFormat);
#if defined(_KERNEL)
	if (isFatal)
		vpanic(pFormat, ap);
	else
		vprintf(pFormat, ap);
#else
	if (ubsan_flags == -1) {
		char buf[1024];
		char *p;

		ubsan_flags = UBSAN_STDERR;

		if (getenv_r("LIBC_UBSAN", buf, sizeof(buf)) != -1) {
			for (p = buf; *p; p++) {
				switch (*p) {
				case 'a':
					SET(ubsan_flags, UBSAN_ABORT);
					break;
				case 'A':
					CLR(ubsan_flags, UBSAN_ABORT);
					break;
				case 'e':
					SET(ubsan_flags, UBSAN_STDERR);
					break;
				case 'E':
					CLR(ubsan_flags, UBSAN_STDERR);
					break;
				case 'l':
					SET(ubsan_flags, UBSAN_SYSLOG);
					break;
				case 'L':
					CLR(ubsan_flags, UBSAN_SYSLOG);
					break;
				case 'o':
					SET(ubsan_flags, UBSAN_STDOUT);
					break;
				case 'O':
					CLR(ubsan_flags, UBSAN_STDOUT);
					break;
				default:
					break;
				}
			}
		}
	}

	// The *v*print* functions can flush the va_list argument.
	// Create a local copy for each call to prevent invalid read.
	if (ISSET(ubsan_flags, UBSAN_STDOUT)) {
		va_list tmp;