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error.c
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error.c
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/**********************************************************************
error.c -
$Author$
created at: Mon Aug 9 16:11:34 JST 1993
Copyright (C) 1993-2007 Yukihiro Matsumoto
**********************************************************************/
#include "internal.h"
#include "ruby/st.h"
#include "vm_core.h"
#include <stdio.h>
#include <stdarg.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <errno.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifndef EXIT_SUCCESS
#define EXIT_SUCCESS 0
#endif
#ifndef WIFEXITED
#define WIFEXITED(status) 1
#endif
#ifndef WEXITSTATUS
#define WEXITSTATUS(status) (status)
#endif
VALUE rb_eEAGAIN;
VALUE rb_eEWOULDBLOCK;
VALUE rb_eEINPROGRESS;
extern const char ruby_description[];
static const char REPORTBUG_MSG[] =
"[NOTE]\n" \
"You may have encountered a bug in the Ruby interpreter" \
" or extension libraries.\n" \
"Bug reports are welcome.\n" \
""
"For details: http://www.ruby-lang.org/bugreport.html\n\n" \
;
static const char *
rb_strerrno(int err)
{
#define defined_error(name, num) if (err == (num)) return (name);
#define undefined_error(name)
#include "known_errors.inc"
#undef defined_error
#undef undefined_error
return NULL;
}
static int
err_position_0(char *buf, long len, const char *file, int line)
{
if (!file) {
return 0;
}
else if (line == 0) {
return snprintf(buf, len, "%s: ", file);
}
else {
return snprintf(buf, len, "%s:%d: ", file, line);
}
}
static VALUE
compile_snprintf(rb_encoding *enc, const char *pre, const char *file, int line, const char *fmt, va_list args)
{
VALUE str = rb_enc_str_new(0, 0, enc);
if (file) {
rb_str_cat2(str, file);
if (line) rb_str_catf(str, ":%d", line);
rb_str_cat2(str, ": ");
}
if (pre) rb_str_cat2(str, pre);
rb_str_vcatf(str, fmt, args);
return str;
}
static void
compile_err_append(VALUE mesg)
{
rb_thread_t *th = GET_THREAD();
VALUE err = th->errinfo;
rb_block_t *prev_base_block = th->base_block;
th->base_block = 0;
/* base_block should be zero while normal Ruby execution */
/* after this line, any Ruby code *can* run */
if (th->mild_compile_error) {
if (RTEST(err)) {
VALUE str = rb_obj_as_string(err);
rb_str_cat2(str, "\n");
rb_str_append(str, mesg);
mesg = str;
}
err = rb_exc_new3(rb_eSyntaxError, mesg);
th->errinfo = err;
}
else {
if (!RTEST(err)) {
err = rb_exc_new2(rb_eSyntaxError, "compile error");
th->errinfo = err;
}
rb_str_cat2(mesg, "\n");
rb_write_error_str(mesg);
}
/* returned to the parser world */
th->base_block = prev_base_block;
}
void
rb_compile_error_with_enc(const char *file, int line, void *enc, const char *fmt, ...)
{
va_list args;
VALUE str;
va_start(args, fmt);
str = compile_snprintf(enc, NULL, file, line, fmt, args);
va_end(args);
compile_err_append(str);
}
void
rb_compile_error(const char *file, int line, const char *fmt, ...)
{
va_list args;
VALUE str;
va_start(args, fmt);
str = compile_snprintf(NULL, NULL, file, line, fmt, args);
va_end(args);
compile_err_append(str);
}
void
rb_compile_error_append(const char *fmt, ...)
{
va_list args;
VALUE str;
va_start(args, fmt);
str = rb_vsprintf(fmt, args);
va_end(args);
compile_err_append(str);
}
static void
compile_warn_print(const char *file, int line, const char *fmt, va_list args)
{
VALUE str;
str = compile_snprintf(NULL, "warning: ", file, line, fmt, args);
rb_str_cat2(str, "\n");
rb_write_error_str(str);
}
void
rb_compile_warn(const char *file, int line, const char *fmt, ...)
{
va_list args;
if (NIL_P(ruby_verbose)) return;
va_start(args, fmt);
compile_warn_print(file, line, fmt, args);
va_end(args);
}
/* rb_compile_warning() reports only in verbose mode */
void
rb_compile_warning(const char *file, int line, const char *fmt, ...)
{
va_list args;
if (!RTEST(ruby_verbose)) return;
va_start(args, fmt);
compile_warn_print(file, line, fmt, args);
va_end(args);
}
static VALUE
warning_string(rb_encoding *enc, const char *fmt, va_list args)
{
VALUE str = rb_enc_str_new(0, 0, enc);
int line;
VALUE file = rb_source_location(&line);
if (!NIL_P(file)) {
str = rb_str_append(str, file);
if (line) rb_str_catf(str, ":%d", line);
rb_str_cat2(str, ": ");
}
rb_str_cat2(str, "warning: ");
rb_str_vcatf(str, fmt, args);
rb_str_cat2(str, "\n");
return str;
}
void
rb_warn(const char *fmt, ...)
{
VALUE mesg;
va_list args;
if (NIL_P(ruby_verbose)) return;
va_start(args, fmt);
mesg = warning_string(0, fmt, args);
va_end(args);
rb_write_error_str(mesg);
}
#if 0
void
rb_enc_warn(rb_encoding *enc, const char *fmt, ...)
{
VALUE mesg;
va_list args;
if (NIL_P(ruby_verbose)) return;
va_start(args, fmt);
mesg = warning_string(enc, fmt, args);
va_end(args);
rb_write_error_str(mesg);
}
#endif
/* rb_warning() reports only in verbose mode */
void
rb_warning(const char *fmt, ...)
{
VALUE mesg;
va_list args;
if (!RTEST(ruby_verbose)) return;
va_start(args, fmt);
mesg = warning_string(0, fmt, args);
va_end(args);
rb_write_error_str(mesg);
}
#if 0
void
rb_enc_warning(rb_encoding *enc, const char *fmt, ...)
{
VALUE mesg;
va_list args;
if (!RTEST(ruby_verbose)) return;
va_start(args, fmt);
mesg = warning_string(enc, fmt, args);
va_end(args);
rb_write_error_str(mesg);
}
#endif
/*
* call-seq:
* warn(msg, ...) -> nil
*
* Displays each of the given messages followed by a record separator on
* STDERR unless warnings have been disabled (for example with the
* <code>-W0</code> flag).
*
* warn("warning 1", "warning 2")
*
* <em>produces:</em>
*
* warning 1
* warning 2
*/
static VALUE
rb_warn_m(int argc, VALUE *argv, VALUE exc)
{
if (!NIL_P(ruby_verbose) && argc > 0) {
rb_io_puts(argc, argv, rb_stderr);
}
return Qnil;
}
#define MAX_BUG_REPORTERS 0x100
static struct bug_reporters {
void (*func)(FILE *out, void *data);
void *data;
} bug_reporters[MAX_BUG_REPORTERS];
static int bug_reporters_size;
int
rb_bug_reporter_add(void (*func)(FILE *, void *), void *data)
{
struct bug_reporters *reporter;
if (bug_reporters_size >= MAX_BUG_REPORTERS) {
return 0; /* failed to register */
}
reporter = &bug_reporters[bug_reporters_size++];
reporter->func = func;
reporter->data = data;
return 1;
}
/* SIGSEGV handler might have a very small stack. Thus we need to use it carefully. */
#define REPORT_BUG_BUFSIZ 256
static FILE *
bug_report_file(const char *file, int line)
{
char buf[REPORT_BUG_BUFSIZ];
FILE *out = stderr;
int len = err_position_0(buf, sizeof(buf), file, line);
if ((ssize_t)fwrite(buf, 1, len, out) == (ssize_t)len ||
(ssize_t)fwrite(buf, 1, len, (out = stdout)) == (ssize_t)len) {
return out;
}
return NULL;
}
static void
bug_report_begin(FILE *out, const char *fmt, va_list args)
{
char buf[REPORT_BUG_BUFSIZ];
fputs("[BUG] ", out);
vsnprintf(buf, sizeof(buf), fmt, args);
fputs(buf, out);
snprintf(buf, sizeof(buf), "\n%s\n\n", ruby_description);
fputs(buf, out);
}
#define bug_report_begin(out, fmt) do { \
va_list args; \
va_start(args, fmt); \
bug_report_begin(out, fmt, args); \
va_end(args); \
} while (0)
static void
bug_report_end(FILE *out)
{
/* call additional bug reporters */
{
int i;
for (i=0; i<bug_reporters_size; i++) {
struct bug_reporters *reporter = &bug_reporters[i];
(*reporter->func)(out, reporter->data);
}
}
fprintf(out, REPORTBUG_MSG);
}
#define report_bug(file, line, fmt, ctx) do { \
FILE *out = bug_report_file(file, line); \
if (out) { \
bug_report_begin(out, fmt); \
rb_vm_bugreport(ctx); \
bug_report_end(out); \
} \
} while (0) \
NORETURN(static void die(void));
static void
die(void)
{
#if defined(_WIN32) && defined(RUBY_MSVCRT_VERSION) && RUBY_MSVCRT_VERSION >= 80
_set_abort_behavior( 0, _CALL_REPORTFAULT);
#endif
abort();
}
void
rb_bug(const char *fmt, ...)
{
const char *file = NULL;
int line = 0;
if (GET_THREAD()) {
file = rb_source_loc(&line);
}
report_bug(file, line, fmt, NULL);
die();
}
void
rb_bug_context(const void *ctx, const char *fmt, ...)
{
const char *file = NULL;
int line = 0;
if (GET_THREAD()) {
file = rb_source_loc(&line);
}
report_bug(file, line, fmt, ctx);
die();
}
void
rb_bug_errno(const char *mesg, int errno_arg)
{
if (errno_arg == 0)
rb_bug("%s: errno == 0 (NOERROR)", mesg);
else {
const char *errno_str = rb_strerrno(errno_arg);
if (errno_str)
rb_bug("%s: %s (%s)", mesg, strerror(errno_arg), errno_str);
else
rb_bug("%s: %s (%d)", mesg, strerror(errno_arg), errno_arg);
}
}
/*
* this is safe to call inside signal handler and timer thread
* (which isn't a Ruby Thread object)
*/
#define write_or_abort(fd, str, len) (write((fd), (str), (len)) < 0 ? abort() : (void)0)
#define WRITE_CONST(fd,str) write_or_abort((fd),(str),sizeof(str) - 1)
void
rb_async_bug_errno(const char *mesg, int errno_arg)
{
WRITE_CONST(2, "[ASYNC BUG] ");
write_or_abort(2, mesg, strlen(mesg));
WRITE_CONST(2, "\n");
if (errno_arg == 0) {
WRITE_CONST(2, "errno == 0 (NOERROR)\n");
}
else {
const char *errno_str = rb_strerrno(errno_arg);
if (!errno_str)
errno_str = "undefined errno";
write_or_abort(2, errno_str, strlen(errno_str));
}
WRITE_CONST(2, "\n\n");
write_or_abort(2, ruby_description, strlen(ruby_description));
WRITE_CONST(2, "\n\n");
WRITE_CONST(2, REPORTBUG_MSG);
abort();
}
void
rb_compile_bug(const char *file, int line, const char *fmt, ...)
{
report_bug(file, line, fmt, NULL);
abort();
}
static const char builtin_types[][10] = {
"", /* 0x00, */
"Object",
"Class",
"Module",
"Float",
"String",
"Regexp",
"Array",
"Hash",
"Struct",
"Bignum",
"File",
"Data", /* internal use: wrapped C pointers */
"MatchData", /* data of $~ */
"Complex",
"Rational",
"", /* 0x10 */
"nil",
"true",
"false",
"Symbol", /* :symbol */
"Fixnum",
"undef", /* internal use: #undef; should not happen */
"", /* 0x17 */
"", /* 0x18 */
"", /* 0x19 */
"Memo", /* internal use: general memo */
"Node", /* internal use: syntax tree node */
"iClass", /* internal use: mixed-in module holder */
};
const char *
rb_builtin_type_name(int t)
{
const char *name;
if ((unsigned int)t >= numberof(builtin_types)) return 0;
name = builtin_types[t];
if (*name) return name;
return 0;
}
static const char *
builtin_class_name(VALUE x)
{
const char *etype;
if (NIL_P(x)) {
etype = "nil";
}
else if (FIXNUM_P(x)) {
etype = "Fixnum";
}
else if (SYMBOL_P(x)) {
etype = "Symbol";
}
else if (RB_TYPE_P(x, T_TRUE)) {
etype = "true";
}
else if (RB_TYPE_P(x, T_FALSE)) {
etype = "false";
}
else {
etype = NULL;
}
return etype;
}
const char *
rb_builtin_class_name(VALUE x)
{
const char *etype = builtin_class_name(x);
if (!etype) {
etype = rb_obj_classname(x);
}
return etype;
}
void
rb_check_type(VALUE x, int t)
{
int xt;
if (x == Qundef) {
rb_bug("undef leaked to the Ruby space");
}
xt = TYPE(x);
if (xt != t || (xt == T_DATA && RTYPEDDATA_P(x))) {
const char *tname = rb_builtin_type_name(t);
if (tname) {
const char *cname = builtin_class_name(x);
if (cname)
rb_raise(rb_eTypeError, "wrong argument type %s (expected %s)",
cname, tname);
else
rb_raise(rb_eTypeError, "wrong argument type %"PRIsVALUE" (expected %s)",
rb_obj_class(x), tname);
}
if (xt > T_MASK && xt <= 0x3f) {
rb_fatal("unknown type 0x%x (0x%x given, probably comes from extension library for ruby 1.8)", t, xt);
}
rb_bug("unknown type 0x%x (0x%x given)", t, xt);
}
}
int
rb_typeddata_inherited_p(const rb_data_type_t *child, const rb_data_type_t *parent)
{
while (child) {
if (child == parent) return 1;
child = child->parent;
}
return 0;
}
int
rb_typeddata_is_kind_of(VALUE obj, const rb_data_type_t *data_type)
{
if (!RB_TYPE_P(obj, T_DATA) ||
!RTYPEDDATA_P(obj) || !rb_typeddata_inherited_p(RTYPEDDATA_TYPE(obj), data_type)) {
return 0;
}
return 1;
}
void *
rb_check_typeddata(VALUE obj, const rb_data_type_t *data_type)
{
const char *etype;
if (!RB_TYPE_P(obj, T_DATA)) {
wrong_type:
etype = builtin_class_name(obj);
if (!etype)
rb_raise(rb_eTypeError, "wrong argument type %"PRIsVALUE" (expected %s)",
rb_obj_class(obj), data_type->wrap_struct_name);
wrong_datatype:
rb_raise(rb_eTypeError, "wrong argument type %s (expected %s)",
etype, data_type->wrap_struct_name);
}
if (!RTYPEDDATA_P(obj)) {
goto wrong_type;
}
else if (!rb_typeddata_inherited_p(RTYPEDDATA_TYPE(obj), data_type)) {
etype = RTYPEDDATA_TYPE(obj)->wrap_struct_name;
goto wrong_datatype;
}
return DATA_PTR(obj);
}
/* exception classes */
VALUE rb_eException;
VALUE rb_eSystemExit;
VALUE rb_eInterrupt;
VALUE rb_eSignal;
VALUE rb_eFatal;
VALUE rb_eStandardError;
VALUE rb_eRuntimeError;
VALUE rb_eTypeError;
VALUE rb_eArgError;
VALUE rb_eIndexError;
VALUE rb_eKeyError;
VALUE rb_eRangeError;
VALUE rb_eNameError;
VALUE rb_eEncodingError;
VALUE rb_eEncCompatError;
VALUE rb_eNoMethodError;
VALUE rb_eSecurityError;
VALUE rb_eNotImpError;
VALUE rb_eNoMemError;
VALUE rb_cNameErrorMesg;
VALUE rb_eScriptError;
VALUE rb_eSyntaxError;
VALUE rb_eLoadError;
VALUE rb_eSystemCallError;
VALUE rb_mErrno;
static VALUE rb_eNOERROR;
static ID id_new, id_cause, id_message, id_backtrace;
static ID id_name, id_args, id_Errno, id_errno, id_i_path;
static ID id_receiver;
extern ID ruby_static_id_status;
#define id_bt idBt
#define id_bt_locations idBt_locations
#define id_mesg idMesg
#define id_status ruby_static_id_status
#undef rb_exc_new_cstr
VALUE
rb_exc_new(VALUE etype, const char *ptr, long len)
{
return rb_funcall(etype, id_new, 1, rb_str_new(ptr, len));
}
VALUE
rb_exc_new_cstr(VALUE etype, const char *s)
{
return rb_exc_new(etype, s, strlen(s));
}
VALUE
rb_exc_new_str(VALUE etype, VALUE str)
{
StringValue(str);
return rb_funcall(etype, id_new, 1, str);
}
/*
* call-seq:
* Exception.new(msg = nil) -> exception
*
* Construct a new Exception object, optionally passing in
* a message.
*/
static VALUE
exc_initialize(int argc, VALUE *argv, VALUE exc)
{
VALUE arg;
rb_scan_args(argc, argv, "01", &arg);
rb_ivar_set(exc, id_mesg, arg);
rb_ivar_set(exc, id_bt, Qnil);
return exc;
}
/*
* Document-method: exception
*
* call-seq:
* exc.exception(string) -> an_exception or exc
*
* With no argument, or if the argument is the same as the receiver,
* return the receiver. Otherwise, create a new
* exception object of the same class as the receiver, but with a
* message equal to <code>string.to_str</code>.
*
*/
static VALUE
exc_exception(int argc, VALUE *argv, VALUE self)
{
VALUE exc;
if (argc == 0) return self;
if (argc == 1 && self == argv[0]) return self;
exc = rb_obj_clone(self);
exc_initialize(argc, argv, exc);
return exc;
}
/*
* call-seq:
* exception.to_s -> string
*
* Returns exception's message (or the name of the exception if
* no message is set).
*/
static VALUE
exc_to_s(VALUE exc)
{
VALUE mesg = rb_attr_get(exc, idMesg);
if (NIL_P(mesg)) return rb_class_name(CLASS_OF(exc));
return rb_String(mesg);
}
/*
* call-seq:
* exception.message -> string
*
* Returns the result of invoking <code>exception.to_s</code>.
* Normally this returns the exception's message or name. By
* supplying a to_str method, exceptions are agreeing to
* be used where Strings are expected.
*/
static VALUE
exc_message(VALUE exc)
{
return rb_funcallv(exc, idTo_s, 0, 0);
}
/*
* call-seq:
* exception.inspect -> string
*
* Return this exception's class name and message
*/
static VALUE
exc_inspect(VALUE exc)
{
VALUE str, klass;
klass = CLASS_OF(exc);
exc = rb_obj_as_string(exc);
if (RSTRING_LEN(exc) == 0) {
return rb_str_dup(rb_class_name(klass));
}
str = rb_str_buf_new2("#<");
klass = rb_class_name(klass);
rb_str_buf_append(str, klass);
rb_str_buf_cat(str, ": ", 2);
rb_str_buf_append(str, exc);
rb_str_buf_cat(str, ">", 1);
return str;
}
/*
* call-seq:
* exception.backtrace -> array
*
* Returns any backtrace associated with the exception. The backtrace
* is an array of strings, each containing either ``filename:lineNo: in
* `method''' or ``filename:lineNo.''
*
* def a
* raise "boom"
* end
*
* def b
* a()
* end
*
* begin
* b()
* rescue => detail
* print detail.backtrace.join("\n")
* end
*
* <em>produces:</em>
*
* prog.rb:2:in `a'
* prog.rb:6:in `b'
* prog.rb:10
*/
static VALUE
exc_backtrace(VALUE exc)
{
VALUE obj;
obj = rb_attr_get(exc, id_bt);
if (rb_backtrace_p(obj)) {
obj = rb_backtrace_to_str_ary(obj);
/* rb_ivar_set(exc, id_bt, obj); */
}
return obj;
}
/*
* call-seq:
* exception.backtrace_locations -> array
*
* Returns any backtrace associated with the exception. This method is
* similar to Exception#backtrace, but the backtrace is an array of
* Thread::Backtrace::Location.
*
* Now, this method is not affected by Exception#set_backtrace().
*/
static VALUE
exc_backtrace_locations(VALUE exc)
{
VALUE obj;
obj = rb_attr_get(exc, id_bt_locations);
if (!NIL_P(obj)) {
obj = rb_backtrace_to_location_ary(obj);
}
return obj;
}
VALUE
rb_check_backtrace(VALUE bt)
{
long i;
static const char err[] = "backtrace must be Array of String";
if (!NIL_P(bt)) {
if (RB_TYPE_P(bt, T_STRING)) return rb_ary_new3(1, bt);
if (rb_backtrace_p(bt)) return bt;
if (!RB_TYPE_P(bt, T_ARRAY)) {
rb_raise(rb_eTypeError, err);
}
for (i=0;i<RARRAY_LEN(bt);i++) {
VALUE e = RARRAY_AREF(bt, i);
if (!RB_TYPE_P(e, T_STRING)) {
rb_raise(rb_eTypeError, err);
}
}
}
return bt;
}
/*
* call-seq:
* exc.set_backtrace(backtrace) -> array
*
* Sets the backtrace information associated with +exc+. The +backtrace+ must
* be an array of String objects or a single String in the format described
* in Exception#backtrace.
*
*/
static VALUE
exc_set_backtrace(VALUE exc, VALUE bt)
{
return rb_ivar_set(exc, id_bt, rb_check_backtrace(bt));
}
VALUE
rb_exc_set_backtrace(VALUE exc, VALUE bt)
{
return exc_set_backtrace(exc, bt);
}
/*
* call-seq:
* exception.cause -> an_exception or nil
*
* Returns the previous exception ($!) at the time this exception was raised.
* This is useful for wrapping exceptions and retaining the original exception
* information.
*/
VALUE
exc_cause(VALUE exc)
{
return rb_attr_get(exc, id_cause);
}
static VALUE
try_convert_to_exception(VALUE obj)
{
return rb_check_funcall(obj, idException, 0, 0);
}
/*
* call-seq:
* exc == obj -> true or false
*
* Equality---If <i>obj</i> is not an <code>Exception</code>, returns
* <code>false</code>. Otherwise, returns <code>true</code> if <i>exc</i> and
* <i>obj</i> share same class, messages, and backtrace.
*/
static VALUE
exc_equal(VALUE exc, VALUE obj)
{
VALUE mesg, backtrace;
if (exc == obj) return Qtrue;
if (rb_obj_class(exc) != rb_obj_class(obj)) {
int status = 0;
obj = rb_protect(try_convert_to_exception, obj, &status);
if (status || obj == Qundef) {
rb_set_errinfo(Qnil);
return Qfalse;
}
if (rb_obj_class(exc) != rb_obj_class(obj)) return Qfalse;
mesg = rb_check_funcall(obj, id_message, 0, 0);
if (mesg == Qundef) return Qfalse;
backtrace = rb_check_funcall(obj, id_backtrace, 0, 0);
if (backtrace == Qundef) return Qfalse;
}
else {
mesg = rb_attr_get(obj, id_mesg);
backtrace = exc_backtrace(obj);
}
if (!rb_equal(rb_attr_get(exc, id_mesg), mesg))
return Qfalse;
if (!rb_equal(exc_backtrace(exc), backtrace))
return Qfalse;
return Qtrue;
}
/*
* call-seq:
* SystemExit.new -> system_exit
* SystemExit.new(status) -> system_exit
* SystemExit.new(status, msg) -> system_exit
* SystemExit.new(msg) -> system_exit
*
* Create a new +SystemExit+ exception with the given status and message.
* Status is true, false, or an integer.
* If status is not given, true is used.
*/
static VALUE
exit_initialize(int argc, VALUE *argv, VALUE exc)
{
VALUE status;
if (argc > 0) {
status = *argv;
switch (status) {
case Qtrue:
status = INT2FIX(EXIT_SUCCESS);
++argv;
--argc;
break;
case Qfalse:
status = INT2FIX(EXIT_FAILURE);
++argv;
--argc;
break;