mirror of
https://github.com/mruby/mruby
synced 2026-06-08 16:11:16 +00:00
dearblue
c1f112c49a
When a global jump occurs, look at the catch handler table to determine where to jump. In that case, `pc` already shows the following instruction, but since the table shows `begin_offset ... end_offset`, the comparison is done with `begin_offset < pc && pc <= end_offset`. If there is a corresponding handler, move `pc` to `handler.target_offset` and continue running the VM. When a global jump across `ensure` is made by `return`, `break`, `next`, `redo` and `retry`, the extended `RBreak` object saves and restores the C-level execution position. This extended `RBreak` can have tag information, which makes it a pseudo coroutine (the "tag" mimics CRuby). The implementation of pseudo coroutines by `RBreak` is summarized by `CHECKPOINT_RESTORE ... CHECKPOINT_MAIN ... CHECKPOINT_END` and `throw_tagged_break` / `unwind_ensure` macros. The restart of processing is branched by `RBREAK_TAG_FOREACH(DISPATCH_CHECKPOINTS)`. - Not only `rescue` blocks but also `ensure` blocks are now sandwiched between `OP_EXCEPT` and `OP_RAISEIF`. - Remove the function `ecall()`. It is no longer necessary to re-enter the VM to perform an "ensure block". This will resolves #1888. - Added instruction `OP_JUW` (Jump while UnWind). It jumps unconditionally like `OP_JMP`, but searches the catch handler table and executes the ensure block. Since it searches the catch handler table, it is much heavier than `OP_JMP`.
137 lines
3.7 KiB
C
137 lines
3.7 KiB
C
/**
|
|
** @file mruby/error.h - Exception class
|
|
**
|
|
** See Copyright Notice in mruby.h
|
|
*/
|
|
|
|
#ifndef MRUBY_ERROR_H
|
|
#define MRUBY_ERROR_H
|
|
|
|
#include "common.h"
|
|
|
|
/**
|
|
* MRuby error handling.
|
|
*/
|
|
MRB_BEGIN_DECL
|
|
|
|
struct RException {
|
|
MRB_OBJECT_HEADER;
|
|
struct iv_tbl *iv;
|
|
};
|
|
|
|
#define mrb_exc_ptr(v) ((struct RException*)mrb_ptr(v))
|
|
|
|
MRB_API void mrb_sys_fail(mrb_state *mrb, const char *mesg);
|
|
MRB_API mrb_value mrb_exc_new_str(mrb_state *mrb, struct RClass* c, mrb_value str);
|
|
#define mrb_exc_new_str_lit(mrb, c, lit) mrb_exc_new_str(mrb, c, mrb_str_new_lit(mrb, lit))
|
|
MRB_API mrb_value mrb_make_exception(mrb_state *mrb, mrb_int argc, const mrb_value *argv);
|
|
MRB_API mrb_value mrb_exc_backtrace(mrb_state *mrb, mrb_value exc);
|
|
MRB_API mrb_value mrb_get_backtrace(mrb_state *mrb);
|
|
MRB_API mrb_noreturn void mrb_no_method_error(mrb_state *mrb, mrb_sym id, mrb_value args, const char *fmt, ...);
|
|
|
|
/* declaration for `fail` method */
|
|
MRB_API mrb_value mrb_f_raise(mrb_state*, mrb_value);
|
|
|
|
#if defined(MRB_64BIT) || defined(MRB_USE_FLOAT) || defined(MRB_NAN_BOXING) || defined(MRB_WORD_BOXING)
|
|
struct RBreak {
|
|
MRB_OBJECT_HEADER;
|
|
const struct RProc *proc;
|
|
mrb_value val;
|
|
};
|
|
#define mrb_break_value_get(brk) ((brk)->val)
|
|
#define mrb_break_value_set(brk, v) ((brk)->val = v)
|
|
#else
|
|
struct RBreak {
|
|
MRB_OBJECT_HEADER;
|
|
const struct RProc *proc;
|
|
union mrb_value_union value;
|
|
};
|
|
#define RBREAK_VALUE_TT_MASK ((1 << 8) - 1)
|
|
static inline mrb_value
|
|
mrb_break_value_get(struct RBreak *brk)
|
|
{
|
|
mrb_value val;
|
|
val.value = brk->value;
|
|
val.tt = (enum mrb_vtype)(brk->flags & RBREAK_VALUE_TT_MASK);
|
|
return val;
|
|
}
|
|
static inline void
|
|
mrb_break_value_set(struct RBreak *brk, mrb_value val)
|
|
{
|
|
brk->value = val.value;
|
|
brk->flags &= ~RBREAK_VALUE_TT_MASK;
|
|
brk->flags |= val.tt;
|
|
}
|
|
#endif /* MRB_64BIT || MRB_USE_FLOAT || MRB_NAN_BOXING || MRB_WORD_BOXING */
|
|
#define mrb_break_proc_get(brk) ((brk)->proc)
|
|
#define mrb_break_proc_set(brk, p) ((brk)->proc = p)
|
|
|
|
#define RBREAK_TAG_FOREACH(f) \
|
|
f(RBREAK_TAG_BREAK, 0) \
|
|
f(RBREAK_TAG_BREAK_UPPER, 1) \
|
|
f(RBREAK_TAG_BREAK_INTARGET, 2) \
|
|
f(RBREAK_TAG_RETURN_BLOCK, 3) \
|
|
f(RBREAK_TAG_RETURN, 4) \
|
|
f(RBREAK_TAG_RETURN_TOPLEVEL, 5) \
|
|
f(RBREAK_TAG_JUMP, 6) \
|
|
f(RBREAK_TAG_STOP, 7)
|
|
|
|
#define RBREAK_TAG_DEFINE(tag, i) tag = i,
|
|
enum {
|
|
RBREAK_TAG_FOREACH(RBREAK_TAG_DEFINE)
|
|
};
|
|
#undef RBREAK_TAG_DEFINE
|
|
|
|
#define RBREAK_TAG_BIT 3
|
|
#define RBREAK_TAG_BIT_OFF 8
|
|
#define RBREAK_TAG_MASK (~(~UINT32_C(0) << RBREAK_TAG_BIT))
|
|
|
|
static inline uint32_t
|
|
mrb_break_tag_get(struct RBreak *brk)
|
|
{
|
|
return (brk->flags >> RBREAK_TAG_BIT_OFF) & RBREAK_TAG_MASK;
|
|
}
|
|
|
|
static inline void
|
|
mrb_break_tag_set(struct RBreak *brk, uint32_t tag)
|
|
{
|
|
brk->flags &= ~(RBREAK_TAG_MASK << RBREAK_TAG_BIT_OFF);
|
|
brk->flags |= (tag & RBREAK_TAG_MASK) << RBREAK_TAG_BIT_OFF;
|
|
}
|
|
|
|
/**
|
|
* Protect
|
|
*
|
|
* Implemented in the mruby-error mrbgem
|
|
*/
|
|
MRB_API mrb_value mrb_protect(mrb_state *mrb, mrb_func_t body, mrb_value data, mrb_bool *state);
|
|
|
|
/**
|
|
* Ensure
|
|
*
|
|
* Implemented in the mruby-error mrbgem
|
|
*/
|
|
MRB_API mrb_value mrb_ensure(mrb_state *mrb, mrb_func_t body, mrb_value b_data,
|
|
mrb_func_t ensure, mrb_value e_data);
|
|
|
|
/**
|
|
* Rescue
|
|
*
|
|
* Implemented in the mruby-error mrbgem
|
|
*/
|
|
MRB_API mrb_value mrb_rescue(mrb_state *mrb, mrb_func_t body, mrb_value b_data,
|
|
mrb_func_t rescue, mrb_value r_data);
|
|
|
|
/**
|
|
* Rescue exception
|
|
*
|
|
* Implemented in the mruby-error mrbgem
|
|
*/
|
|
MRB_API mrb_value mrb_rescue_exceptions(mrb_state *mrb, mrb_func_t body, mrb_value b_data,
|
|
mrb_func_t rescue, mrb_value r_data,
|
|
mrb_int len, struct RClass **classes);
|
|
|
|
MRB_END_DECL
|
|
|
|
#endif /* MRUBY_ERROR_H */
|