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ruby--ruby/eval_intern.h

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#ifndef EVAL_INTERN_H_INCLUDED
#define EVAL_INTERN_H_INCLUDED
#define PASS_PASSED_BLOCK() \
(GET_THREAD()->passed_block = \
GC_GUARDED_PTR_REF((yarv_block_t *)GET_THREAD()->cfp->lfp[0]))
#define UNSUPPORTED(func) \
{ \
int *a = 0; \
fprintf(stderr, "%s", "-- unsupported: " #func "\n"); fflush(stderr); \
*a = 0; \
rb_bug("unsupported: " #func); \
}
#include "ruby.h"
#include "node.h"
#include "util.h"
#include "rubysig.h"
#include "yarv.h"
#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>
#include "st.h"
#include "dln.h"
#ifdef __APPLE__
#include <crt_externs.h>
#endif
/* Make alloca work the best possible way. */
#ifdef __GNUC__
# ifndef atarist
# ifndef alloca
# define alloca __builtin_alloca
# endif
# endif /* atarist */
#else
# ifdef HAVE_ALLOCA_H
# include <alloca.h>
# else
# ifdef _AIX
#pragma alloca
# else
# ifndef alloca /* predefined by HP cc +Olibcalls */
void *alloca();
# endif
# endif /* AIX */
# endif /* HAVE_ALLOCA_H */
#endif /* __GNUC__ */
#ifdef HAVE_STDARG_PROTOTYPES
#include <stdarg.h>
#define va_init_list(a,b) va_start(a,b)
#else
#include <varargs.h>
#define va_init_list(a,b) va_start(a)
#endif
#ifndef HAVE_STRING_H
char *strrchr _((const char *, const char));
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef __BEOS__
#include <net/socket.h>
#endif
#ifdef __MACOS__
#include "macruby_private.h"
#endif
#ifdef __VMS
#include "vmsruby_private.h"
#endif
#ifdef USE_CONTEXT
NORETURN(static void rb_jump_context(rb_jmpbuf_t, int));
static inline void
rb_jump_context(rb_jmpbuf_t env, int val)
{
env->status = val;
setcontext(&env->context);
abort(); /* ensure noreturn */
}
/*
* FUNCTION_CALL_MAY_RETURN_TWICE is a magic for getcontext, gcc,
* IA64 register stack and SPARC register window combination problem.
*
* Assume following code sequence.
*
* 1. set a register in the register stack/window such as r32/l0.
* 2. call getcontext.
* 3. use the register.
* 4. update the register for other use.
* 5. call setcontext indirectly (or directly).
*
* This code should be run as 1->2->3->4->5->3->4.
* But after second getcontext return (second 3),
* the register is broken (updated).
* It's because getcontext/setcontext doesn't preserve the content of the
* register stack/window.
*
* setjmp also doesn't preserve the content of the register stack/window.
* But it has not the problem because gcc knows setjmp may return twice.
* gcc detects setjmp and generates setjmp safe code.
*
* So setjmp call before getcontext call makes the code somewhat safe.
* It fix the problem on IA64.
* It is not required that setjmp is called at run time, since the problem is
* register usage.
*
* Since the magic setjmp is not enough for SPARC,
* inline asm is used to prohibit registers in register windows.
*/
#if defined (__GNUC__) && (defined(sparc) || defined(__sparc__))
#define FUNCTION_CALL_MAY_RETURN_TWICE \
({ __asm__ volatile ("" : : : \
"%o0", "%o1", "%o2", "%o3", "%o4", "%o5", "%o7", \
"%l0", "%l1", "%l2", "%l3", "%l4", "%l5", "%l6", "%l7", \
"%i0", "%i1", "%i2", "%i3", "%i4", "%i5", "%i7"); })
#else
extern jmp_buf function_call_may_return_twice_jmp_buf;
extern int function_call_may_return_twice_false;
#define FUNCTION_CALL_MAY_RETURN_TWICE \
(function_call_may_return_twice_false ? \
setjmp(function_call_may_return_twice_jmp_buf) : \
0)
#endif
#define ruby_longjmp(env, val) rb_jump_context(env, val)
#define ruby_setjmp(j) ((j)->status = 0, \
FUNCTION_CALL_MAY_RETURN_TWICE, \
getcontext(&(j)->context), \
(j)->status)
#else
#if !defined(setjmp) && defined(HAVE__SETJMP)
#define ruby_setjmp(env) _setjmp(env)
#define ruby_longjmp(env,val) _longjmp(env,val)
#else
#define ruby_setjmp(env) setjmp(env)
#define ruby_longjmp(env,val) longjmp(env,val)
#endif
#endif
#include <sys/types.h>
#include <signal.h>
#include <errno.h>
#if defined(__VMS)
#pragma nostandard
#endif
#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)
#endif
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#include <sys/stat.h>
#define TH_PUSH_TAG(th) do { \
yarv_thread_t * const _th = th; \
struct yarv_tag _tag; \
_tag.tag = 0; \
_tag.prev = _th->tag; \
_th->tag = &_tag;
#define TH_POP_TAG() \
_th->tag = _tag.prev; \
} while (0)
#define TH_POP_TAG2() \
_th->tag = _tag.prev
#define PUSH_TAG(ptag) TH_PUSH_TAG(GET_THREAD())
#define POP_TAG() TH_POP_TAG()
#define POP_TAG_INIT() } while (0)
#define PUSH_THREAD_TAG() \
PUSH_TAG(PROT_THREAD)
#define POP_THREAD_TAG() \
POP_TAG()
#define PROT_NONE Qfalse /* 0 */
#define PROT_THREAD Qtrue /* 2 */
#define PROT_FUNC INT2FIX(0) /* 1 */
#define PROT_LOOP INT2FIX(1) /* 3 */
#define PROT_LAMBDA INT2FIX(2) /* 5 */
#define PROT_YIELD INT2FIX(3) /* 7 */
#define PROT_TOP INT2FIX(4) /* 9 */
#define TH_EXEC_TAG() \
(FLUSH_REGISTER_WINDOWS, ruby_setjmp(_th->tag->buf))
#define EXEC_TAG() \
TH_EXEC_TAG()
#define TH_JUMP_TAG(th, st) do { \
ruby_longjmp(th->tag->buf,(st)); \
} while (0)
#define JUMP_TAG(st) TH_JUMP_TAG(GET_THREAD(), st)
#define TAG_RETURN 0x1
#define TAG_BREAK 0x2
#define TAG_NEXT 0x3
#define TAG_RETRY 0x4
#define TAG_REDO 0x5
#define TAG_RAISE 0x6
#define TAG_THROW 0x7
#define TAG_FATAL 0x8
#define TAG_CONTCALL 0x9
#define TAG_THREAD 0xa
#define TAG_MASK 0xf
#define SCOPE_TEST(f) \
(ruby_cref()->nd_visi & (f))
#define SCOPE_CHECK(f) \
(ruby_cref()->nd_visi == (f))
#define SCOPE_SET(f) \
{ \
ruby_cref()->nd_visi = (f); \
}
struct ruby_env {
struct ruby_env *prev;
struct FRAME *frame;
struct SCOPE *scope;
struct BLOCK *block;
struct iter *iter;
struct tag *tag;
NODE *cref;
};
typedef struct thread *rb_thread_t;
extern VALUE rb_cBinding;
extern VALUE rb_eThreadError;
extern VALUE rb_eLocalJumpError;
extern VALUE rb_eSysStackError;
extern VALUE exception_error;
extern VALUE sysstack_error;
void rb_thread_cleanup _((void));
void rb_thread_wait_other_threads _((void));
int thread_set_raised(yarv_thread_t *th);
int thread_reset_raised(yarv_thread_t *th);
VALUE rb_f_eval(int argc, VALUE *argv, VALUE self);
VALUE rb_make_exception _((int argc, VALUE *argv));
NORETURN(void rb_raise_jump _((VALUE)));
NORETURN(void print_undef _((VALUE, ID)));
NORETURN(void th_localjump_error(const char *, VALUE, int));
NORETURN(void th_jump_tag_but_local_jump(int, VALUE));
rb_thread_t rb_vm_curr_thread();
VALUE th_compile(yarv_thread_t *th, VALUE str, VALUE file, VALUE line);
NODE *th_get_cref(yarv_thread_t *th, yarv_iseq_t *iseq, yarv_control_frame_t *cfp);
NODE *th_cref_push(yarv_thread_t *th, VALUE, int);
NODE *th_set_special_cref(yarv_thread_t *th, VALUE *lfp, NODE * cref_stack);
static yarv_control_frame_t *
th_get_ruby_level_cfp(yarv_thread_t *th, yarv_control_frame_t *cfp)
{
yarv_iseq_t *iseq = 0;
while (!YARV_CONTROL_FRAME_STACK_OVERFLOW_P(th, cfp)) {
if (YARV_NORMAL_ISEQ_P(cfp->iseq)) {
iseq = cfp->iseq;
break;
}
cfp = YARV_PREVIOUS_CONTROL_FRAME(cfp);
}
if (!iseq) {
return 0;
}
return cfp;
}
static NODE *
ruby_cref()
{
yarv_thread_t *th = GET_THREAD();
yarv_control_frame_t *cfp = th_get_ruby_level_cfp(th, th->cfp);
return th_get_cref(th, cfp->iseq, cfp);
}
VALUE th_get_cbase(yarv_thread_t *th);
#define ruby_cbase() th_get_cbase(GET_THREAD())
#endif /* EVAL_INTERN_H_INCLUDED */
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