summaryrefslogtreecommitdiff
path: root/eval_intern.h
blob: 78861b32fb9b8d770fed7aae47cb7f1885cff6b2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
#ifndef RUBY_EVAL_INTERN_H
#define RUBY_EVAL_INTERN_H

#include "ruby/ruby.h"
#include "vm_core.h"

static inline void
pass_passed_block(rb_thread_t *th)
{
    th->passed_block = rb_vm_control_frame_block_ptr(th->cfp);
    th->cfp->flag |= VM_FRAME_FLAG_PASSED;
}
#define PASS_PASSED_BLOCK_TH(th) pass_passed_block(th)
#define PASS_PASSED_BLOCK() pass_passed_block(GET_THREAD())

#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifndef EXIT_SUCCESS
#define EXIT_SUCCESS 0
#endif
#ifndef EXIT_FAILURE
#define EXIT_FAILURE 1
#endif

#include <stdio.h>
#include <setjmp.h>

#ifdef __APPLE__
# ifdef HAVE_CRT_EXTERNS_H
#  include <crt_externs.h>
# else
#  include "missing/crt_externs.h"
# endif
#endif

#ifndef HAVE_STRING_H
char *strrchr(const char *, const char);
#endif

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#ifdef HAVE_NET_SOCKET_H
#include <net/socket.h>
#endif

#define ruby_setjmp(env) RUBY_SETJMP(env)
#define ruby_longjmp(env,val) RUBY_LONGJMP((env),(val))
#ifdef __CYGWIN__
# ifndef _setjmp
int _setjmp(jmp_buf);
# endif
# ifndef _longjmp
NORETURN(void _longjmp(jmp_buf, int));
# endif
#endif

#include <sys/types.h>
#include <signal.h>
#include <errno.h>

#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif

/*
  Solaris sys/select.h switches select to select_large_fdset to support larger
  file descriptors if FD_SETSIZE is larger than 1024 on 32bit environment.
  But Ruby doesn't change FD_SETSIZE because fd_set is allocated dynamically.
  So following definition is required to use select_large_fdset.
*/
#ifdef HAVE_SELECT_LARGE_FDSET
#define select(n, r, w, e, t) select_large_fdset((n), (r), (w), (e), (t))
extern int select_large_fdset(int, fd_set *, fd_set *, fd_set *, struct timeval *);
#endif

#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif

#include <sys/stat.h>

#ifdef _MSC_VER
#define SAVE_ROOT_JMPBUF_BEFORE_STMT \
    __try {
#define SAVE_ROOT_JMPBUF_AFTER_STMT \
    } \
    __except (GetExceptionCode() == EXCEPTION_STACK_OVERFLOW ? \
	      (rb_thread_raised_set(GET_THREAD(), RAISED_STACKOVERFLOW), \
	       raise(SIGSEGV), \
	       EXCEPTION_EXECUTE_HANDLER) : \
	      EXCEPTION_CONTINUE_SEARCH) { \
	/* never reaches here */ \
    }
#elif defined(__MINGW32__)
LONG WINAPI rb_w32_stack_overflow_handler(struct _EXCEPTION_POINTERS *);
#define SAVE_ROOT_JMPBUF_BEFORE_STMT \
    do { \
	PVOID _handler = AddVectoredExceptionHandler(1, rb_w32_stack_overflow_handler);

#define SAVE_ROOT_JMPBUF_AFTER_STMT \
	RemoveVectoredExceptionHandler(_handler); \
    } while (0);
#else
#define SAVE_ROOT_JMPBUF_BEFORE_STMT
#define SAVE_ROOT_JMPBUF_AFTER_STMT
#endif

#define SAVE_ROOT_JMPBUF(th, stmt) do \
  if (ruby_setjmp((th)->root_jmpbuf) == 0) { \
      SAVE_ROOT_JMPBUF_BEFORE_STMT \
      stmt; \
      SAVE_ROOT_JMPBUF_AFTER_STMT \
  } \
  else { \
      rb_fiber_start(); \
  } while (0)

#define TH_PUSH_TAG(th) do { \
  rb_thread_t * const _th = (th); \
  struct rb_vm_tag _tag; \
  _tag.tag = 0; \
  _tag.prev = _th->tag;

#define TH_POP_TAG() \
  _th->tag = _tag.prev; \
} while (0)

#define TH_TMPPOP_TAG() \
  _th->tag = _tag.prev

#define TH_REPUSH_TAG() (void)(_th->tag = &_tag)

#define PUSH_TAG() TH_PUSH_TAG(GET_THREAD())
#define POP_TAG()      TH_POP_TAG()

#if defined __GNUC__ && __GNUC__ == 4 && (__GNUC_MINOR__ >= 6 && __GNUC_MINOR__ <= 8)
# define VAR_FROM_MEMORY(var) __extension__(*(__typeof__(var) volatile *)&(var))
# define VAR_INITIALIZED(var) ((var) = VAR_FROM_MEMORY(var))
#else
# define VAR_FROM_MEMORY(var) (var)
# define VAR_INITIALIZED(var) ((void)&(var))
#endif

/* clear th->state, and return the value */
static inline int
rb_threadptr_tag_state(rb_thread_t *th)
{
    int state = th->state;
    th->state = 0;
    return state;
}

NORETURN(static inline void rb_threadptr_tag_jump(rb_thread_t *, int));
static inline void
rb_threadptr_tag_jump(rb_thread_t *th, int st)
{
    th->state = st;
    ruby_longjmp(th->tag->buf, 1);
}

/*
  setjmp() in assignment expression rhs is undefined behavior
  [ISO/IEC 9899:1999] 7.13.1.1
*/
#define TH_EXEC_TAG() \
    (ruby_setjmp(_tag.buf) ? rb_threadptr_tag_state(VAR_FROM_MEMORY(_th)) : (TH_REPUSH_TAG(), 0))

#define EXEC_TAG() \
  TH_EXEC_TAG()

#define TH_JUMP_TAG(th, st) rb_threadptr_tag_jump(th, st)

#define JUMP_TAG(st) TH_JUMP_TAG(GET_THREAD(), (st))

#define INTERNAL_EXCEPTION_P(exc) FIXNUM_P(exc)

/* CREF operators */

#define CREF_FL_PUSHED_BY_EVAL IMEMO_FL_USER1
#define CREF_FL_OMOD_SHARED    IMEMO_FL_USER2

static inline VALUE
CREF_CLASS(const rb_cref_t *cref)
{
    return cref->klass;
}

static inline rb_cref_t *
CREF_NEXT(const rb_cref_t *cref)
{
    return cref->next;
}

static inline const rb_scope_visibility_t *
CREF_SCOPE_VISI(const rb_cref_t *cref)
{
    return &cref->scope_visi;
}

static inline VALUE
CREF_REFINEMENTS(const rb_cref_t *cref)
{
    return cref->refinements;
}

static inline void
CREF_REFINEMENTS_SET(rb_cref_t *cref, VALUE refs)
{
    RB_OBJ_WRITE(cref, &cref->refinements, refs);
}

static inline int
CREF_PUSHED_BY_EVAL(const rb_cref_t *cref)
{
    return cref->flags & CREF_FL_PUSHED_BY_EVAL;
}

static inline void
CREF_PUSHED_BY_EVAL_SET(rb_cref_t *cref)
{
    cref->flags |= CREF_FL_PUSHED_BY_EVAL;
}

static inline int
CREF_OMOD_SHARED(const rb_cref_t *cref)
{
    return cref->flags & CREF_FL_OMOD_SHARED;
}

static inline void
CREF_OMOD_SHARED_SET(rb_cref_t *cref)
{
    cref->flags |= CREF_FL_OMOD_SHARED;
}

static inline void
CREF_OMOD_SHARED_UNSET(rb_cref_t *cref)
{
    cref->flags &= ~CREF_FL_OMOD_SHARED;
}

void rb_thread_cleanup(void);
void rb_thread_wait_other_threads(void);

enum {
    RAISED_EXCEPTION = 1,
    RAISED_STACKOVERFLOW = 2,
    RAISED_NOMEMORY = 4
};
int rb_threadptr_set_raised(rb_thread_t *th);
int rb_threadptr_reset_raised(rb_thread_t *th);
#define rb_thread_raised_set(th, f)   ((th)->raised_flag |= (f))
#define rb_thread_raised_reset(th, f) ((th)->raised_flag &= ~(f))
#define rb_thread_raised_p(th, f)     (((th)->raised_flag & (f)) != 0)
#define rb_thread_raised_clear(th)    ((th)->raised_flag = 0)

VALUE rb_f_eval(int argc, const VALUE *argv, VALUE self);
VALUE rb_make_exception(int argc, const VALUE *argv);

NORETURN(void rb_method_name_error(VALUE, VALUE));

NORETURN(void rb_fiber_start(void));

NORETURN(void rb_print_undef(VALUE, ID, rb_method_visibility_t));
NORETURN(void rb_print_undef_str(VALUE, VALUE));
NORETURN(void rb_print_inaccessible(VALUE, ID, rb_method_visibility_t));
NORETURN(void rb_vm_localjump_error(const char *,VALUE, int));
NORETURN(void rb_vm_jump_tag_but_local_jump(int));
NORETURN(void rb_raise_method_missing(rb_thread_t *th, int argc, const VALUE *argv,
				      VALUE obj, int call_status));

VALUE rb_vm_make_jump_tag_but_local_jump(int state, VALUE val);
rb_cref_t *rb_vm_cref(void);
rb_cref_t *rb_vm_cref_replace_with_duplicated_cref(void);
VALUE rb_vm_call_cfunc(VALUE recv, VALUE (*func)(VALUE), VALUE arg, const rb_block_t *blockptr, VALUE filename);
void rb_vm_set_progname(VALUE filename);
void rb_thread_terminate_all(void);
VALUE rb_vm_top_self();
VALUE rb_vm_cbase(void);

#ifndef CharNext		/* defined as CharNext[AW] on Windows. */
# ifdef HAVE_MBLEN
#  define CharNext(p) ((p) + mblen((p), RUBY_MBCHAR_MAXSIZE))
# else
#  define CharNext(p) ((p) + 1)
# endif
#endif

#if defined DOSISH || defined __CYGWIN__
static inline void
translit_char(char *p, int from, int to)
{
    while (*p) {
	if ((unsigned char)*p == from)
	    *p = to;
	p = CharNext(p);
    }
}
#endif

#endif /* RUBY_EVAL_INTERN_H */