зеркало из https://github.com/github/ruby.git
491 строка
13 KiB
C
491 строка
13 KiB
C
/* -*-c-*- */
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/*
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* included by eval.c
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*/
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#define write_warn(str, x) \
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(NIL_P(str) ? warn_print(x) : (void)rb_str_cat_cstr(str, x))
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#define write_warn2(str, x, l) \
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(NIL_P(str) ? warn_print2(x, l) : (void)rb_str_cat(str, x, l))
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#ifdef HAVE_BUILTIN___BUILTIN_CONSTANT_P
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#define warn_print(x) RB_GNUC_EXTENSION_BLOCK( \
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(__builtin_constant_p(x)) ? \
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rb_write_error2((x), (long)strlen(x)) : \
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rb_write_error(x) \
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)
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#else
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#define warn_print(x) rb_write_error(x)
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#endif
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#define warn_print2(x,l) rb_write_error2((x),(l))
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#define write_warn_str(str,x) NIL_P(str) ? rb_write_error_str(x) : (void)rb_str_concat((str), (x))
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#define warn_print_str(x) rb_write_error_str(x)
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static VALUE error_pos_str(void);
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static void
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error_pos(const VALUE str)
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{
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VALUE pos = error_pos_str();
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if (!NIL_P(pos)) {
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write_warn_str(str, pos);
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}
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}
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static VALUE
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error_pos_str(void)
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{
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int sourceline;
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VALUE sourcefile = rb_source_location(&sourceline);
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if (!NIL_P(sourcefile)) {
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ID caller_name;
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if (sourceline == 0) {
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return rb_sprintf("%"PRIsVALUE": ", sourcefile);
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}
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else if ((caller_name = rb_frame_callee()) != 0) {
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return rb_sprintf("%"PRIsVALUE":%d:in `%"PRIsVALUE"': ",
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sourcefile, sourceline,
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rb_id2str(caller_name));
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}
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else {
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return rb_sprintf("%"PRIsVALUE":%d: ", sourcefile, sourceline);
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}
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}
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return Qnil;
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}
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static void
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set_backtrace(VALUE info, VALUE bt)
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{
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ID set_backtrace = rb_intern("set_backtrace");
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if (rb_backtrace_p(bt)) {
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if (rb_method_basic_definition_p(CLASS_OF(info), set_backtrace)) {
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rb_exc_set_backtrace(info, bt);
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return;
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}
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else {
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bt = rb_backtrace_to_str_ary(bt);
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}
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}
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rb_check_funcall(info, set_backtrace, 1, &bt);
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}
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static void
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error_print(rb_execution_context_t *ec)
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{
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rb_ec_error_print(ec, ec->errinfo);
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}
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static void
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write_warnq(VALUE out, VALUE str, const char *ptr, long len)
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{
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if (NIL_P(out)) {
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const char *beg = ptr;
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const long olen = len;
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for (; len > 0; --len, ++ptr) {
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unsigned char c = *ptr;
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if (rb_iscntrl(c)) {
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char buf[5];
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const char *cc = 0;
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if (ptr > beg) rb_write_error2(beg, ptr - beg);
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beg = ptr + 1;
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cc = ruby_escaped_char(c);
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if (cc) {
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rb_write_error2(cc, strlen(cc));
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}
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else {
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rb_write_error2(buf, snprintf(buf, sizeof(buf), "\\x%02X", c));
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}
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}
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else if (c == '\\') {
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rb_write_error2(beg, ptr - beg + 1);
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beg = ptr;
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}
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}
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if (ptr > beg) {
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if (beg == RSTRING_PTR(str) && olen == RSTRING_LEN(str))
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rb_write_error_str(str);
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else
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rb_write_error2(beg, ptr - beg);
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}
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}
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else {
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rb_str_cat(out, ptr, len);
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}
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}
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#define CSI_BEGIN "\033["
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#define CSI_SGR "m"
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static const char underline[] = CSI_BEGIN"1;4"CSI_SGR;
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static const char bold[] = CSI_BEGIN"1"CSI_SGR;
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static const char reset[] = CSI_BEGIN""CSI_SGR;
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static void
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print_errinfo(const VALUE eclass, const VALUE errat, const VALUE emesg, const VALUE str, int highlight)
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{
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const char *einfo = "";
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long elen = 0;
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VALUE mesg;
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if (emesg != Qundef) {
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if (NIL_P(errat) || RARRAY_LEN(errat) == 0 ||
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NIL_P(mesg = RARRAY_AREF(errat, 0))) {
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error_pos(str);
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}
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else {
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write_warn_str(str, mesg);
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write_warn(str, ": ");
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}
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if (highlight) write_warn(str, bold);
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if (!NIL_P(emesg)) {
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einfo = RSTRING_PTR(emesg);
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elen = RSTRING_LEN(emesg);
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}
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}
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if (eclass == rb_eRuntimeError && elen == 0) {
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if (highlight) write_warn(str, underline);
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write_warn(str, "unhandled exception");
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if (highlight) write_warn(str, reset);
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write_warn2(str, "\n", 1);
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}
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else {
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VALUE epath;
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epath = rb_class_name(eclass);
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if (elen == 0) {
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if (highlight) write_warn(str, underline);
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write_warn_str(str, epath);
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if (highlight) write_warn(str, reset);
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write_warn(str, "\n");
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}
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else {
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const char *tail = 0;
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if (emesg == Qundef && highlight) write_warn(str, bold);
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if (RSTRING_PTR(epath)[0] == '#')
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epath = 0;
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if ((tail = memchr(einfo, '\n', elen)) != 0) {
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write_warnq(str, emesg, einfo, tail - einfo);
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tail++; /* skip newline */
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}
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else {
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write_warnq(str, emesg, einfo, elen);
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}
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if (epath) {
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write_warn(str, " (");
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if (highlight) write_warn(str, underline);
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write_warn_str(str, epath);
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if (highlight) {
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write_warn(str, reset);
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write_warn(str, bold);
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}
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write_warn2(str, ")", 1);
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if (highlight) write_warn(str, reset);
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write_warn2(str, "\n", 1);
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}
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if (tail && einfo+elen > tail) {
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if (!highlight) {
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write_warnq(str, emesg, tail, einfo+elen-tail);
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if (einfo[elen-1] != '\n') write_warn2(str, "\n", 1);
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}
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else {
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elen -= tail - einfo;
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einfo = tail;
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while (elen > 0) {
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tail = memchr(einfo, '\n', elen);
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if (!tail || tail > einfo) {
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write_warn(str, bold);
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write_warnq(str, emesg, einfo, tail ? tail-einfo : elen);
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write_warn(str, reset);
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if (!tail) {
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write_warn2(str, "\n", 1);
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break;
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}
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}
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elen -= tail - einfo;
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einfo = tail;
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do ++tail; while (tail < einfo+elen && *tail == '\n');
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write_warnq(str, emesg, einfo, tail-einfo);
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elen -= tail - einfo;
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einfo = tail;
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}
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}
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}
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else if (!epath) {
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write_warn2(str, "\n", 1);
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}
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}
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}
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}
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static void
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print_backtrace(const VALUE eclass, const VALUE errat, const VALUE str, int reverse)
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{
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if (!NIL_P(errat)) {
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long i;
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long len = RARRAY_LEN(errat);
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int skip = eclass == rb_eSysStackError;
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const int threshold = 1000000000;
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int width = (len <= 1) ? INT_MIN : ((int)log10((double)(len > threshold ?
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((len - 1) / threshold) :
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len - 1)) +
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(len < threshold ? 0 : 9) + 1);
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#define TRACE_MAX (TRACE_HEAD+TRACE_TAIL+5)
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#define TRACE_HEAD 8
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#define TRACE_TAIL 5
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for (i = 1; i < len; i++) {
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VALUE line = RARRAY_AREF(errat, reverse ? len - i : i);
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if (RB_TYPE_P(line, T_STRING)) {
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VALUE bt = rb_str_new_cstr("\t");
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if (reverse) rb_str_catf(bt, "%*ld: ", width, len - i);
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write_warn_str(str, rb_str_catf(bt, "from %"PRIsVALUE"\n", line));
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}
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if (skip && i == TRACE_HEAD && len > TRACE_MAX) {
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write_warn_str(str, rb_sprintf("\t ... %ld levels...\n",
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len - TRACE_HEAD - TRACE_TAIL));
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i = len - TRACE_TAIL;
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}
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}
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}
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}
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VALUE rb_get_message(VALUE exc);
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static int
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shown_cause_p(VALUE cause, VALUE *shown_causes)
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{
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VALUE shown = *shown_causes;
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if (!shown) {
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*shown_causes = shown = rb_obj_hide(rb_ident_hash_new());
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}
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if (rb_hash_has_key(shown, cause)) return TRUE;
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rb_hash_aset(shown, cause, Qtrue);
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return FALSE;
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}
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static void
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show_cause(VALUE errinfo, VALUE str, VALUE highlight, VALUE reverse, VALUE *shown_causes)
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{
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VALUE cause = rb_attr_get(errinfo, id_cause);
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if (!NIL_P(cause) && rb_obj_is_kind_of(cause, rb_eException) &&
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!shown_cause_p(cause, shown_causes)) {
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volatile VALUE eclass = CLASS_OF(cause);
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VALUE errat = rb_get_backtrace(cause);
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VALUE emesg = rb_get_message(cause);
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if (reverse) {
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show_cause(cause, str, highlight, reverse, shown_causes);
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print_backtrace(eclass, errat, str, TRUE);
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print_errinfo(eclass, errat, emesg, str, highlight!=0);
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}
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else {
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print_errinfo(eclass, errat, emesg, str, highlight!=0);
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print_backtrace(eclass, errat, str, FALSE);
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show_cause(cause, str, highlight, reverse, shown_causes);
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}
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}
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}
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void
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rb_error_write(VALUE errinfo, VALUE emesg, VALUE errat, VALUE str, VALUE highlight, VALUE reverse)
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{
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volatile VALUE eclass;
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VALUE shown_causes = 0;
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if (NIL_P(errinfo))
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return;
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if (errat == Qundef) {
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errat = Qnil;
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}
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eclass = CLASS_OF(errinfo);
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if (NIL_P(reverse) || NIL_P(highlight)) {
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VALUE tty = (VALUE)rb_stderr_tty_p();
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if (NIL_P(reverse)) reverse = tty;
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if (NIL_P(highlight)) highlight = tty;
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}
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if (reverse) {
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static const char traceback[] = "Traceback "
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"(most recent call last):\n";
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const int bold_part = rb_strlen_lit("Traceback");
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char buff[sizeof(traceback)+sizeof(bold)+sizeof(reset)-2], *p = buff;
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const char *msg = traceback;
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long len = sizeof(traceback) - 1;
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if (highlight) {
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#define APPEND(s, l) (memcpy(p, s, l), p += (l))
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APPEND(bold, sizeof(bold)-1);
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APPEND(traceback, bold_part);
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APPEND(reset, sizeof(reset)-1);
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APPEND(traceback + bold_part, sizeof(traceback)-bold_part-1);
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#undef APPEND
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len = p - (msg = buff);
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}
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write_warn2(str, msg, len);
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show_cause(errinfo, str, highlight, reverse, &shown_causes);
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print_backtrace(eclass, errat, str, TRUE);
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print_errinfo(eclass, errat, emesg, str, highlight!=0);
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}
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else {
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print_errinfo(eclass, errat, emesg, str, highlight!=0);
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print_backtrace(eclass, errat, str, FALSE);
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show_cause(errinfo, str, highlight, reverse, &shown_causes);
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}
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}
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void
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rb_ec_error_print(rb_execution_context_t * volatile ec, volatile VALUE errinfo)
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{
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volatile uint8_t raised_flag = ec->raised_flag;
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volatile VALUE errat = Qundef;
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volatile VALUE emesg = Qundef;
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if (NIL_P(errinfo))
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return;
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rb_ec_raised_clear(ec);
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EC_PUSH_TAG(ec);
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if (EC_EXEC_TAG() == TAG_NONE) {
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errat = rb_get_backtrace(errinfo);
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}
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if (emesg == Qundef) {
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emesg = Qnil;
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emesg = rb_get_message(errinfo);
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}
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rb_error_write(errinfo, emesg, errat, Qnil, Qnil, Qnil);
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EC_POP_TAG();
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ec->errinfo = errinfo;
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rb_ec_raised_set(ec, raised_flag);
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}
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#define undef_mesg_for(v, k) rb_fstring_lit("undefined"v" method `%1$s' for "k" `%2$s'")
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#define undef_mesg(v) ( \
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is_mod ? \
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undef_mesg_for(v, "module") : \
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undef_mesg_for(v, "class"))
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void
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rb_print_undef(VALUE klass, ID id, rb_method_visibility_t visi)
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{
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const int is_mod = RB_TYPE_P(klass, T_MODULE);
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VALUE mesg;
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switch (visi & METHOD_VISI_MASK) {
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case METHOD_VISI_UNDEF:
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case METHOD_VISI_PUBLIC: mesg = undef_mesg(""); break;
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case METHOD_VISI_PRIVATE: mesg = undef_mesg(" private"); break;
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case METHOD_VISI_PROTECTED: mesg = undef_mesg(" protected"); break;
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default: UNREACHABLE;
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}
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rb_name_err_raise_str(mesg, klass, ID2SYM(id));
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}
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void
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rb_print_undef_str(VALUE klass, VALUE name)
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{
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const int is_mod = RB_TYPE_P(klass, T_MODULE);
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rb_name_err_raise_str(undef_mesg(""), klass, name);
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}
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#define inaccessible_mesg_for(v, k) rb_fstring_lit("method `%1$s' for "k" `%2$s' is "v)
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#define inaccessible_mesg(v) ( \
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is_mod ? \
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inaccessible_mesg_for(v, "module") : \
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inaccessible_mesg_for(v, "class"))
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void
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rb_print_inaccessible(VALUE klass, ID id, rb_method_visibility_t visi)
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{
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const int is_mod = RB_TYPE_P(klass, T_MODULE);
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VALUE mesg;
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switch (visi & METHOD_VISI_MASK) {
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case METHOD_VISI_UNDEF:
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case METHOD_VISI_PUBLIC: mesg = inaccessible_mesg(""); break;
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case METHOD_VISI_PRIVATE: mesg = inaccessible_mesg(" private"); break;
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case METHOD_VISI_PROTECTED: mesg = inaccessible_mesg(" protected"); break;
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default: UNREACHABLE;
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}
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rb_name_err_raise_str(mesg, klass, ID2SYM(id));
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}
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static int
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sysexit_status(VALUE err)
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{
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VALUE st = rb_ivar_get(err, id_status);
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return NUM2INT(st);
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}
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#define unknown_longjmp_status(status) \
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rb_bug("Unknown longjmp status %d", status)
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static int
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error_handle(int ex)
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{
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int status = EXIT_FAILURE;
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rb_execution_context_t *ec = GET_EC();
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if (rb_ec_set_raised(ec))
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return EXIT_FAILURE;
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switch (ex & TAG_MASK) {
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case 0:
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status = EXIT_SUCCESS;
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break;
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case TAG_RETURN:
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error_pos(Qnil);
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warn_print("unexpected return\n");
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break;
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case TAG_NEXT:
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error_pos(Qnil);
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warn_print("unexpected next\n");
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break;
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case TAG_BREAK:
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error_pos(Qnil);
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warn_print("unexpected break\n");
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break;
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case TAG_REDO:
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error_pos(Qnil);
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warn_print("unexpected redo\n");
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break;
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case TAG_RETRY:
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error_pos(Qnil);
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warn_print("retry outside of rescue clause\n");
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break;
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case TAG_THROW:
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/* TODO: fix me */
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error_pos(Qnil);
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warn_print("unexpected throw\n");
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break;
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case TAG_RAISE: {
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VALUE errinfo = ec->errinfo;
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if (rb_obj_is_kind_of(errinfo, rb_eSystemExit)) {
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status = sysexit_status(errinfo);
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}
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else if (rb_obj_is_instance_of(errinfo, rb_eSignal) &&
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rb_ivar_get(errinfo, id_signo) != INT2FIX(SIGSEGV)) {
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/* no message when exiting by signal */
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}
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else {
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rb_ec_error_print(ec, errinfo);
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}
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break;
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}
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case TAG_FATAL:
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error_print(ec);
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break;
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default:
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unknown_longjmp_status(ex);
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break;
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}
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rb_ec_reset_raised(ec);
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return status;
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}
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