static void
print_backtrace(const VALUE eclass, const VALUE errat, int reverse)
{
if (!NIL_P(errat)) {
long i;
long len = RARRAY_LEN(errat);
int skip = eclass == rb_eSysStackError;
#define TRACE_MAX (TRACE_HEAD+TRACE_TAIL+5)
#define TRACE_HEAD 8
#define TRACE_TAIL 5
for (i = 1; i < len; i++) {
VALUE line = RARRAY_AREF(errat, reverse ? len - i : i);
if (RB_TYPE_P(line, T_STRING)) {
warn_print_str(rb_sprintf("\tfrom %"PRIsVALUE"\n", line));
}
if (skip && i == TRACE_HEAD && len > TRACE_MAX) {
warn_print_str(rb_sprintf("\t ... %ld levels...\n",
len - TRACE_HEAD - TRACE_TAIL));
i = len - TRACE_TAIL;
}
}
}
}
static void
print_errinfo(const VALUE eclass, const VALUE errat, const VALUE emesg)
{
const char *einfo = "";
long elen = 0;
VALUE mesg;
if (emesg != Qundef) {
if (NIL_P(errat) || RARRAY_LEN(errat) == 0 ||
NIL_P(mesg = RARRAY_AREF(errat, 0))) {
error_pos();
}
else {
warn_print_str(mesg);
warn_print(": ");
}
if (!NIL_P(emesg)) {
einfo = RSTRING_PTR(emesg);
elen = RSTRING_LEN(emesg);
}
}
if (eclass == rb_eRuntimeError && elen == 0) {
warn_print("unhandled exception\n");
}
else {
VALUE epath;
epath = rb_class_name(eclass);
if (elen == 0) {
warn_print_str(epath);
warn_print("\n");
}
else {
const char *tail = 0;
long len = elen;
if (RSTRING_PTR(epath)[0] == '#')
epath = 0;
if ((tail = memchr(einfo, '\n', elen)) != 0) {
len = tail - einfo;
tail++; /* skip newline */
}
warn_print_str(tail ? rb_str_subseq(emesg, 0, len) : emesg);
if (epath) {
warn_print(" (");
warn_print_str(epath);
warn_print(")\n");
}
if (tail) {
warn_print_str(rb_str_subseq(emesg, tail - einfo, elen - len - 1));
}
if (tail ? einfo[elen-1] != '\n' : !epath) warn_print2("\n", 1);
}
}
}
static void
error_pos(void)
{
VALUE str = error_pos_str();
if (!NIL_P(str)) {
warn_print_str(str);
}
}
void
rb_threadptr_error_print(rb_thread_t *th, VALUE errinfo)
{
volatile VALUE errat = Qundef;
int raised_flag = th->raised_flag;
volatile VALUE eclass = Qundef, e = Qundef;
const char *volatile einfo;
volatile long elen;
VALUE mesg;
if (NIL_P(errinfo))
return;
rb_thread_raised_clear(th);
TH_PUSH_TAG(th);
if (TH_EXEC_TAG() == 0) {
errat = rb_get_backtrace(errinfo);
}
else if (errat == Qundef) {
errat = Qnil;
}
else if (eclass == Qundef || e != Qundef) {
goto error;
}
else {
goto no_message;
}
if (NIL_P(errat) || RARRAY_LEN(errat) == 0 ||
NIL_P(mesg = RARRAY_AREF(errat, 0))) {
error_pos();
}
else {
warn_print_str(mesg);
warn_print(": ");
}
eclass = CLASS_OF(errinfo);
if (eclass != Qundef &&
(e = rb_check_funcall(errinfo, rb_intern("message"), 0, 0)) != Qundef &&
(RB_TYPE_P(e, T_STRING) || !NIL_P(e = rb_check_string_type(e)))) {
einfo = RSTRING_PTR(e);
elen = RSTRING_LEN(e);
}
else {
no_message:
einfo = "";
elen = 0;
}
if (eclass == rb_eRuntimeError && elen == 0) {
warn_print("unhandled exception\n");
}
else {
VALUE epath;
epath = rb_class_name(eclass);
if (elen == 0) {
warn_print_str(epath);
warn_print("\n");
}
else {
const char *tail = 0;
long len = elen;
if (RSTRING_PTR(epath)[0] == '#')
epath = 0;
if ((tail = memchr(einfo, '\n', elen)) != 0) {
len = tail - einfo;
tail++; /* skip newline */
}
warn_print_str(tail ? rb_str_subseq(e, 0, len) : e);
if (epath) {
warn_print(" (");
warn_print_str(epath);
warn_print(")\n");
}
if (tail) {
warn_print_str(rb_str_subseq(e, tail - einfo, elen - len - 1));
}
if (tail ? einfo[elen-1] != '\n' : !epath) warn_print2("\n", 1);
}
}
if (!NIL_P(errat)) {
long i;
long len = RARRAY_LEN(errat);
int skip = eclass == rb_eSysStackError;
#define TRACE_MAX (TRACE_HEAD+TRACE_TAIL+5)
#define TRACE_HEAD 8
#define TRACE_TAIL 5
for (i = 1; i < len; i++) {
VALUE line = RARRAY_AREF(errat, i);
if (RB_TYPE_P(line, T_STRING)) {
warn_print_str(rb_sprintf("\tfrom %"PRIsVALUE"\n", line));
}
if (skip && i == TRACE_HEAD && len > TRACE_MAX) {
warn_print_str(rb_sprintf("\t ... %ld levels...\n",
len - TRACE_HEAD - TRACE_TAIL));
i = len - TRACE_TAIL;
}
}
}
error:
TH_POP_TAG();
th->errinfo = errinfo;
rb_thread_raised_set(th, raised_flag);
}
