2 #include <mruby/class.h>
3 #include <mruby/compile.h>
4 #include <mruby/irep.h>
5 #include <mruby/proc.h>
6 #include <mruby/opcode.h>
7 #include <mruby/error.h>
9 mrb_value mrb_exec_irep(mrb_state *mrb, mrb_value self, struct RProc *p);
10 mrb_value mrb_obj_instance_eval(mrb_state *mrb, mrb_value self);
12 static struct mrb_irep *
13 get_closure_irep(mrb_state *mrb, int level)
15 struct RProc *proc = mrb->c->ci[-1].proc;
18 if (!proc) return NULL;
21 if (!proc) return NULL;
22 if (MRB_PROC_CFUNC_P(proc)) {
25 return proc->body.irep;
28 /* search for irep lev above the bottom */
30 search_irep(mrb_irep *top, int bnest, int lev, mrb_irep *bottom)
34 for (i=0; i<top->rlen; i++) {
35 mrb_irep* tmp = top->reps[i];
37 if (tmp == bottom) return top;
38 tmp = search_irep(tmp, bnest-1, lev, bottom);
40 if (bnest == lev) return top;
48 search_variable(mrb_state *mrb, mrb_sym vsym, int bnest)
54 for (level = 0; (virep = get_closure_irep(mrb, level)); level++) {
55 if (virep->lv == NULL) {
58 for (pos = 0; pos < virep->nlocals - 1; pos++) {
59 if (vsym == virep->lv[pos].name) {
60 return (pos+1)<<8 | (level+bnest);
69 irep_argc(mrb_irep *irep)
75 mrb_aspec ax = PEEK_W(irep->iseq+1);
76 /* extra 1 means a slot for block */
77 return MRB_ASPEC_REQ(ax)+MRB_ASPEC_OPT(ax)+MRB_ASPEC_REST(ax)+MRB_ASPEC_POST(ax)+1;
83 potential_upvar_p(struct mrb_locals *lv, uint16_t v, int argc, uint16_t nlocals)
85 if (v >= nlocals) return FALSE;
87 if (v < argc+1) return FALSE;
91 extern uint8_t mrb_insn_size[];
92 extern uint8_t mrb_insn_size1[];
93 extern uint8_t mrb_insn_size2[];
94 extern uint8_t mrb_insn_size3[];
97 patch_irep(mrb_state *mrb, mrb_irep *irep, int bnest, mrb_irep *top)
104 int argc = irep_argc(irep);
106 for (i = 0; i < irep->ilen; ) {
107 insn = irep->iseq[i];
110 b = PEEK_S(irep->iseq+i+1);
111 patch_irep(mrb, irep->reps[b], bnest + 1, top);
116 a = PEEK_B(irep->iseq+i+1);
117 b = PEEK_B(irep->iseq+i+2);
118 patch_irep(mrb, irep->reps[b], bnest + 1, top);
122 b = PEEK_B(irep->iseq+i+2);
123 c = PEEK_B(irep->iseq+i+3);
128 uint16_t arg = search_variable(mrb, irep->syms[b], bnest);
131 irep->iseq[i] = OP_GETUPVAR;
132 irep->iseq[i+2] = arg >> 8;
133 irep->iseq[i+3] = arg & 0xff;
139 a = PEEK_B(irep->iseq+i+1);
140 b = PEEK_B(irep->iseq+i+2);
142 if (potential_upvar_p(irep->lv, b, argc, irep->nlocals)) {
143 uint16_t arg = search_variable(mrb, irep->lv[b - 1].name, bnest);
146 irep->iseq[i] = insn = OP_GETUPVAR;
147 irep->iseq[i+2] = arg >> 8;
148 irep->iseq[i+3] = arg & 0xff;
152 if (potential_upvar_p(irep->lv, a, argc, irep->nlocals)) {
153 uint16_t arg = search_variable(mrb, irep->lv[a - 1].name, bnest);
156 irep->iseq[i] = insn = OP_SETUPVAR;
157 irep->iseq[i+1] = (mrb_code)b;
158 irep->iseq[i+2] = arg >> 8;
159 irep->iseq[i+3] = arg & 0xff;
165 a = PEEK_B(irep->iseq+i+1);
166 b = PEEK_B(irep->iseq+i+2);
167 c = PEEK_B(irep->iseq+i+3);
170 mrb_irep *tmp = search_irep(top, bnest, lev, irep);
171 if (potential_upvar_p(tmp->lv, b, irep_argc(tmp), tmp->nlocals)) {
172 uint16_t arg = search_variable(mrb, tmp->lv[b-1].name, bnest);
175 irep->iseq[i] = OP_GETUPVAR;
176 irep->iseq[i+2] = arg >> 8;
177 irep->iseq[i+3] = arg & 0xff;
184 a = PEEK_B(irep->iseq+i+1);
185 b = PEEK_B(irep->iseq+i+2);
186 c = PEEK_B(irep->iseq+i+3);
189 mrb_irep *tmp = search_irep(top, bnest, lev, irep);
190 if (potential_upvar_p(tmp->lv, b, irep_argc(tmp), tmp->nlocals)) {
191 uint16_t arg = search_variable(mrb, tmp->lv[b-1].name, bnest);
194 irep->iseq[i] = OP_SETUPVAR;
196 irep->iseq[i+2] = arg >> 8;
197 irep->iseq[i+3] = arg & 0xff;
204 insn = PEEK_B(irep->iseq+i+1);
205 i += mrb_insn_size1[insn]+1;
208 insn = PEEK_B(irep->iseq+i+1);
209 i += mrb_insn_size2[insn]+1;
212 insn = PEEK_B(irep->iseq+i+1);
213 i += mrb_insn_size3[insn]+1;
216 i+=mrb_insn_size[insn];
220 void mrb_codedump_all(mrb_state*, struct RProc*);
223 create_proc_from_string(mrb_state *mrb, char *s, mrb_int len, mrb_value binding, const char *file, mrb_int line)
226 struct mrb_parser_state *p;
229 mrb_callinfo *ci; /* callinfo of eval caller */
230 struct RClass *target_class = NULL;
233 if (!mrb_nil_p(binding)) {
234 mrb_raise(mrb, E_ARGUMENT_ERROR, "Binding of eval must be nil.");
237 cxt = mrbc_context_new(mrb);
238 cxt->lineno = (short)line;
240 mrbc_filename(mrb, cxt, file ? file : "(eval)");
241 cxt->capture_errors = TRUE;
242 cxt->no_optimize = TRUE;
245 p = mrb_parse_nstring(mrb, s, len, cxt);
247 /* only occur when memory ran out */
249 mrb_raise(mrb, E_RUNTIME_ERROR, "Failed to create parser state.");
257 str = mrb_format(mrb, " file %S line %S: %S",
258 mrb_str_new_cstr(mrb, file),
259 mrb_fixnum_value(p->error_buffer[0].lineno),
260 mrb_str_new_cstr(mrb, p->error_buffer[0].message));
263 str = mrb_format(mrb, " line %S: %S",
264 mrb_fixnum_value(p->error_buffer[0].lineno),
265 mrb_str_new_cstr(mrb, p->error_buffer[0].message));
268 mrbc_context_free(mrb, cxt);
269 mrb_exc_raise(mrb, mrb_exc_new_str(mrb, E_SYNTAX_ERROR, str));
272 proc = mrb_generate_code(mrb, p);
276 mrbc_context_free(mrb, cxt);
277 mrb_raise(mrb, E_SCRIPT_ERROR, "codegen error");
279 if (mrb->c->ci > mrb->c->cibase) {
280 ci = &mrb->c->ci[-1];
286 target_class = MRB_PROC_TARGET_CLASS(ci->proc);
288 if (ci->proc && !MRB_PROC_CFUNC_P(ci->proc)) {
293 e = (struct REnv*)mrb_obj_alloc(mrb, MRB_TT_ENV,
294 (struct RClass*)target_class);
296 e->stack = ci[1].stackent;
298 MRB_ENV_SET_STACK_LEN(e, ci->proc->body.irep->nlocals);
300 if (ci->argc < 0) bidx = 2;
302 MRB_ENV_SET_BIDX(e, bidx);
306 proc->flags |= MRB_PROC_ENVSET;
307 mrb_field_write_barrier(mrb, (struct RBasic*)proc, (struct RBasic*)e);
309 proc->upper = ci->proc;
310 mrb->c->ci->target_class = target_class;
311 patch_irep(mrb, proc->body.irep, 0, proc->body.irep);
312 /* mrb_codedump_all(mrb, proc); */
315 mrbc_context_free(mrb, cxt);
321 exec_irep(mrb_state *mrb, mrb_value self, struct RProc *proc)
323 /* no argument passed from eval() */
324 mrb->c->ci->argc = 0;
325 if (mrb->c->ci->acc < 0) {
326 ptrdiff_t cioff = mrb->c->ci - mrb->c->cibase;
327 mrb_value ret = mrb_top_run(mrb, proc, self, 0);
329 mrb_exc_raise(mrb, mrb_obj_value(mrb->exc));
331 mrb->c->ci = mrb->c->cibase + cioff;
335 mrb->c->stack[1] = mrb_nil_value();
336 return mrb_exec_irep(mrb, self, proc);
340 f_eval(mrb_state *mrb, mrb_value self)
344 mrb_value binding = mrb_nil_value();
349 mrb_get_args(mrb, "s|ozi", &s, &len, &binding, &file, &line);
351 proc = create_proc_from_string(mrb, s, len, binding, file, line);
352 mrb_assert(!MRB_PROC_CFUNC_P(proc));
353 return exec_irep(mrb, self, proc);
357 f_instance_eval(mrb_state *mrb, mrb_value self)
360 mrb_int argc; mrb_value *argv;
362 mrb_get_args(mrb, "*!&", &argv, &argc, &b);
372 mrb_get_args(mrb, "s|zi", &s, &len, &file, &line);
373 cv = mrb_singleton_class(mrb, self);
374 proc = create_proc_from_string(mrb, s, len, mrb_nil_value(), file, line);
375 MRB_PROC_SET_TARGET_CLASS(proc, mrb_class_ptr(cv));
376 mrb_assert(!MRB_PROC_CFUNC_P(proc));
377 mrb->c->ci->target_class = mrb_class_ptr(cv);
378 return exec_irep(mrb, self, proc);
381 mrb_get_args(mrb, "&", &b);
382 return mrb_obj_instance_eval(mrb, self);
387 mrb_mruby_eval_gem_init(mrb_state* mrb)
389 mrb_define_module_function(mrb, mrb->kernel_module, "eval", f_eval, MRB_ARGS_ARG(1, 3));
390 mrb_define_method(mrb, mrb->kernel_module, "instance_eval", f_instance_eval, MRB_ARGS_ARG(1, 2));
394 mrb_mruby_eval_gem_final(mrb_state* mrb)