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vm.c
1969 lines (1680 loc) · 43.2 KB
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vm.c
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/**********************************************************************
vm.c -
$Author$
Copyright (C) 2004-2007 Koichi Sasada
**********************************************************************/
#include "ruby/ruby.h"
#include "ruby/st.h"
#include "ruby/encoding.h"
#include "gc.h"
#include "vm_core.h"
#include "iseq.h"
#include "eval_intern.h"
#include "vm_insnhelper.h"
#include "vm_insnhelper.c"
#include "vm_exec.h"
#include "vm_exec.c"
#include "vm_method.c"
#include "vm_eval.c"
#define BUFSIZE 0x100
#define PROCDEBUG 0
VALUE rb_cRubyVM;
VALUE rb_cThread;
VALUE rb_cEnv;
VALUE rb_mRubyVMFrozenCore;
VALUE ruby_vm_global_state_version = 1;
char ruby_vm_redefined_flag[BOP_LAST_];
rb_thread_t *ruby_current_thread = 0;
rb_vm_t *ruby_current_vm = 0;
void vm_analysis_operand(int insn, int n, VALUE op);
void vm_analysis_register(int reg, int isset);
void vm_analysis_insn(int insn);
void
rb_vm_change_state(void)
{
INC_VM_STATE_VERSION();
}
/* control stack frame */
static inline VALUE
rb_vm_set_finish_env(rb_thread_t * th)
{
vm_push_frame(th, 0, VM_FRAME_MAGIC_FINISH,
Qnil, th->cfp->lfp[0], 0,
th->cfp->sp, 0, 1);
th->cfp->pc = (VALUE *)&finish_insn_seq[0];
return Qtrue;
}
static void
vm_set_top_stack(rb_thread_t * th, VALUE iseqval)
{
rb_iseq_t *iseq;
GetISeqPtr(iseqval, iseq);
if (iseq->type != ISEQ_TYPE_TOP) {
rb_raise(rb_eTypeError, "Not a toplevel InstructionSequence");
}
/* for return */
rb_vm_set_finish_env(th);
vm_push_frame(th, iseq, VM_FRAME_MAGIC_TOP,
th->top_self, 0, iseq->iseq_encoded,
th->cfp->sp, 0, iseq->local_size);
}
static void
vm_set_eval_stack(rb_thread_t * th, VALUE iseqval, const NODE *cref)
{
rb_iseq_t *iseq;
rb_block_t * const block = th->base_block;
GetISeqPtr(iseqval, iseq);
/* for return */
rb_vm_set_finish_env(th);
vm_push_frame(th, iseq, VM_FRAME_MAGIC_EVAL, block->self,
GC_GUARDED_PTR(block->dfp), iseq->iseq_encoded,
th->cfp->sp, block->lfp, iseq->local_size);
if (cref) {
th->cfp->dfp[-1] = (VALUE)cref;
}
}
rb_control_frame_t *
vm_get_ruby_level_next_cfp(rb_thread_t *th, rb_control_frame_t *cfp)
{
while (!RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P(th, cfp)) {
if (RUBY_VM_NORMAL_ISEQ_P(cfp->iseq)) {
return cfp;
}
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
return 0;
}
rb_control_frame_t *
vm_get_ruby_level_caller_cfp(rb_thread_t *th, rb_control_frame_t *cfp)
{
if (RUBY_VM_NORMAL_ISEQ_P(cfp->iseq)) {
return cfp;
}
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
while (!RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P(th, cfp)) {
if (RUBY_VM_NORMAL_ISEQ_P(cfp->iseq)) {
return cfp;
}
if ((cfp->flag & VM_FRAME_FLAG_PASSED) == 0) {
break;
}
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
return 0;
}
/* Env */
/*
env{
env[0] // special (block or prev env)
env[1] // env object
env[2] // prev env val
};
*/
#define ENV_IN_HEAP_P(th, env) \
(!((th)->stack < (env) && (env) < ((th)->stack + (th)->stack_size)))
#define ENV_VAL(env) ((env)[1])
static void
env_free(void * const ptr)
{
RUBY_FREE_ENTER("env");
if (ptr) {
const rb_env_t * const env = ptr;
RUBY_FREE_UNLESS_NULL(env->env);
ruby_xfree(ptr);
}
RUBY_FREE_LEAVE("env");
}
static void
env_mark(void * const ptr)
{
RUBY_MARK_ENTER("env");
if (ptr) {
const rb_env_t * const env = ptr;
if (env->env) {
/* TODO: should mark more restricted range */
RUBY_GC_INFO("env->env\n");
rb_gc_mark_locations(env->env, env->env + env->env_size);
}
RUBY_GC_INFO("env->prev_envval\n");
RUBY_MARK_UNLESS_NULL(env->prev_envval);
RUBY_MARK_UNLESS_NULL(env->block.self);
RUBY_MARK_UNLESS_NULL(env->block.proc);
if (env->block.iseq) {
if (BUILTIN_TYPE(env->block.iseq) == T_NODE) {
RUBY_MARK_UNLESS_NULL((VALUE)env->block.iseq);
}
else {
RUBY_MARK_UNLESS_NULL(env->block.iseq->self);
}
}
}
RUBY_MARK_LEAVE("env");
}
static VALUE
env_alloc(void)
{
VALUE obj;
rb_env_t *env;
obj = Data_Make_Struct(rb_cEnv, rb_env_t, env_mark, env_free, env);
env->env = 0;
env->prev_envval = 0;
env->block.iseq = 0;
return obj;
}
static VALUE check_env_value(VALUE envval);
static int
check_env(rb_env_t * const env)
{
printf("---\n");
printf("envptr: %p\n", &env->block.dfp[0]);
printf("orphan: %p\n", (void *)env->block.dfp[1]);
printf("inheap: %p\n", (void *)env->block.dfp[2]);
printf("envval: %10p ", (void *)env->block.dfp[3]);
dp(env->block.dfp[3]);
printf("penvv : %10p ", (void *)env->block.dfp[4]);
dp(env->block.dfp[4]);
printf("lfp: %10p\n", env->block.lfp);
printf("dfp: %10p\n", env->block.dfp);
if (env->block.dfp[4]) {
printf(">>\n");
check_env_value(env->block.dfp[4]);
printf("<<\n");
}
return 1;
}
static VALUE
check_env_value(VALUE envval)
{
rb_env_t *env;
GetEnvPtr(envval, env);
if (check_env(env)) {
return envval;
}
rb_bug("invalid env");
return Qnil; /* unreachable */
}
static VALUE
vm_make_env_each(rb_thread_t * const th, rb_control_frame_t * const cfp,
VALUE *envptr, VALUE * const endptr)
{
VALUE envval, penvval = 0;
rb_env_t *env;
VALUE *nenvptr;
int i, local_size;
if (ENV_IN_HEAP_P(th, envptr)) {
return ENV_VAL(envptr);
}
if (envptr != endptr) {
VALUE *penvptr = GC_GUARDED_PTR_REF(*envptr);
rb_control_frame_t *pcfp = cfp;
if (ENV_IN_HEAP_P(th, penvptr)) {
penvval = ENV_VAL(penvptr);
}
else {
while (pcfp->dfp != penvptr) {
pcfp++;
if (pcfp->dfp == 0) {
SDR();
rb_bug("invalid dfp");
}
}
penvval = vm_make_env_each(th, pcfp, penvptr, endptr);
cfp->lfp = pcfp->lfp;
*envptr = GC_GUARDED_PTR(pcfp->dfp);
}
}
/* allocate env */
envval = env_alloc();
GetEnvPtr(envval, env);
if (!RUBY_VM_NORMAL_ISEQ_P(cfp->iseq)) {
local_size = 2;
}
else {
local_size = cfp->iseq->local_size;
}
env->env_size = local_size + 1 + 2;
env->local_size = local_size;
env->env = ALLOC_N(VALUE, env->env_size);
env->prev_envval = penvval;
for (i = 0; i <= local_size; i++) {
env->env[i] = envptr[-local_size + i];
#if 0
fprintf(stderr, "%2d ", &envptr[-local_size + i] - th->stack); dp(env->env[i]);
if (RUBY_VM_NORMAL_ISEQ_P(cfp->iseq)) {
/* clear value stack for GC */
envptr[-local_size + i] = 0;
}
#endif
}
*envptr = envval; /* GC mark */
nenvptr = &env->env[i - 1];
nenvptr[1] = envval; /* frame self */
nenvptr[2] = penvval; /* frame prev env object */
/* reset lfp/dfp in cfp */
cfp->dfp = nenvptr;
if (envptr == endptr) {
cfp->lfp = nenvptr;
}
/* as Binding */
env->block.self = cfp->self;
env->block.lfp = cfp->lfp;
env->block.dfp = cfp->dfp;
env->block.iseq = cfp->iseq;
if (!RUBY_VM_NORMAL_ISEQ_P(cfp->iseq)) {
/* TODO */
env->block.iseq = 0;
}
return envval;
}
static int
collect_local_variables_in_env(rb_env_t * const env, const VALUE ary)
{
int i;
for (i = 0; i < env->block.iseq->local_table_size; i++) {
ID lid = env->block.iseq->local_table[i];
if (lid) {
rb_ary_push(ary, ID2SYM(lid));
}
}
if (env->prev_envval) {
rb_env_t *prevenv;
GetEnvPtr(env->prev_envval, prevenv);
collect_local_variables_in_env(prevenv, ary);
}
return 0;
}
int
vm_collect_local_variables_in_heap(rb_thread_t * const th,
VALUE * const dfp, const VALUE ary)
{
if (ENV_IN_HEAP_P(th, dfp)) {
rb_env_t *env;
GetEnvPtr(ENV_VAL(dfp), env);
collect_local_variables_in_env(env, ary);
return 1;
}
else {
return 0;
}
}
VALUE
vm_make_env_object(rb_thread_t * th, rb_control_frame_t *cfp)
{
VALUE envval;
if (VM_FRAME_TYPE(cfp) == VM_FRAME_MAGIC_FINISH) {
/* for method_missing */
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
envval = vm_make_env_each(th, cfp, cfp->dfp, cfp->lfp);
if (PROCDEBUG) {
check_env_value(envval);
}
return envval;
}
void
vm_stack_to_heap(rb_thread_t * const th)
{
rb_control_frame_t *cfp = th->cfp;
while ((cfp = vm_get_ruby_level_next_cfp(th, cfp)) != 0) {
vm_make_env_object(th, cfp);
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
}
}
/* Proc */
static VALUE
vm_make_proc_from_block(rb_thread_t *th, rb_control_frame_t *cfp,
rb_block_t *block, VALUE klass)
{
VALUE procval;
rb_control_frame_t *bcfp;
VALUE *bdfp; /* to gc mark */
procval = block->proc;
if (procval && RBASIC(procval)->klass == klass) {
return procval;
}
bcfp = RUBY_VM_GET_CFP_FROM_BLOCK_PTR(block);
bdfp = bcfp->dfp;
procval = vm_make_proc(th, bcfp, block, klass);
if (!block->proc) block->proc = procval;
return procval;
}
VALUE
vm_make_proc(rb_thread_t *th, rb_control_frame_t *cfp,
const rb_block_t *block, VALUE klass)
{
VALUE procval, envval, blockprocval = 0;
rb_proc_t *proc;
if (GC_GUARDED_PTR_REF(cfp->lfp[0])) {
if (!RUBY_VM_CLASS_SPECIAL_P(cfp->lfp[0])) {
rb_proc_t *p;
blockprocval = vm_make_proc_from_block(
th, cfp, (rb_block_t *)GC_GUARDED_PTR_REF(*cfp->lfp), klass);
GetProcPtr(blockprocval, p);
*cfp->lfp = GC_GUARDED_PTR(&p->block);
}
}
envval = vm_make_env_object(th, cfp);
if (PROCDEBUG) {
check_env_value(envval);
}
procval = rb_proc_alloc(klass);
GetProcPtr(procval, proc);
proc->blockprocval = blockprocval;
proc->block.self = block->self;
proc->block.lfp = block->lfp;
proc->block.dfp = block->dfp;
proc->block.iseq = block->iseq;
proc->block.proc = procval;
proc->envval = envval;
proc->safe_level = th->safe_level;
if (VMDEBUG) {
if (th->stack < block->dfp && block->dfp < th->stack + th->stack_size) {
rb_bug("invalid ptr: block->dfp");
}
if (th->stack < block->lfp && block->lfp < th->stack + th->stack_size) {
rb_bug("invalid ptr: block->lfp");
}
}
return procval;
}
/* C -> Ruby: block */
static inline VALUE
invoke_block_from_c(rb_thread_t *th, const rb_block_t *block,
VALUE self, int argc, const VALUE *argv,
const rb_block_t *blockptr, const NODE *cref)
{
if (BUILTIN_TYPE(block->iseq) != T_NODE) {
const rb_iseq_t *iseq = block->iseq;
const rb_control_frame_t *cfp = th->cfp;
int i, opt_pc, arg_size = iseq->arg_size;
int type = block_proc_is_lambda(block->proc) ?
VM_FRAME_MAGIC_LAMBDA : VM_FRAME_MAGIC_BLOCK;
rb_vm_set_finish_env(th);
CHECK_STACK_OVERFLOW(cfp, argc + iseq->stack_max);
for (i=0; i<argc; i++) {
cfp->sp[i] = argv[i];
}
opt_pc = vm_yield_setup_args(th, iseq, argc, cfp->sp, blockptr,
type == VM_FRAME_MAGIC_LAMBDA);
vm_push_frame(th, iseq, type,
self, GC_GUARDED_PTR(block->dfp),
iseq->iseq_encoded + opt_pc, cfp->sp + arg_size, block->lfp,
iseq->local_size - arg_size);
if (cref) {
th->cfp->dfp[-1] = (VALUE)cref;
}
return vm_exec(th);
}
else {
return vm_yield_with_cfunc(th, block, self, argc, argv, blockptr);
}
}
static inline const rb_block_t *
check_block(rb_thread_t *th)
{
const rb_block_t *blockptr = GC_GUARDED_PTR_REF(th->cfp->lfp[0]);
if (blockptr == 0) {
vm_localjump_error("no block given", Qnil, 0);
}
return blockptr;
}
static inline VALUE
vm_yield_with_cref(rb_thread_t *th, int argc, const VALUE *argv, const NODE *cref)
{
const rb_block_t *blockptr = check_block(th);
return invoke_block_from_c(th, blockptr, blockptr->self, argc, argv, 0, cref);
}
static inline VALUE
vm_yield(rb_thread_t *th, int argc, const VALUE *argv)
{
const rb_block_t *blockptr = check_block(th);
return invoke_block_from_c(th, blockptr, blockptr->self, argc, argv, 0, 0);
}
VALUE
vm_invoke_proc(rb_thread_t *th, rb_proc_t *proc, VALUE self,
int argc, const VALUE *argv, rb_block_t * blockptr)
{
VALUE val = Qundef;
int state;
volatile int stored_safe = th->safe_level;
rb_control_frame_t * volatile cfp = th->cfp;
TH_PUSH_TAG(th);
if ((state = EXEC_TAG()) == 0) {
if (!proc->is_from_method) {
th->safe_level = proc->safe_level;
}
val = invoke_block_from_c(th, &proc->block, self, argc, argv, blockptr, 0);
}
TH_POP_TAG();
if (!proc->is_from_method) {
th->safe_level = stored_safe;
}
if (state) {
if (state == TAG_RETURN && proc->is_lambda) {
VALUE err = th->errinfo;
VALUE *escape_dfp = GET_THROWOBJ_CATCH_POINT(err);
if (escape_dfp == cfp->dfp) {
printf("ok\n");
state = 0;
th->errinfo = Qnil;
th->cfp = cfp;
val = GET_THROWOBJ_VAL(err);
}
}
}
if (state) {
JUMP_TAG(state);
}
return val;
}
/* special variable */
static rb_control_frame_t *
vm_normal_frame(rb_thread_t *th, rb_control_frame_t *cfp)
{
while (cfp->pc == 0) {
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
if (RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P(th, cfp)) {
return 0;
}
}
return cfp;
}
static VALUE
vm_cfp_svar_get(rb_thread_t *th, rb_control_frame_t *cfp, VALUE key)
{
cfp = vm_normal_frame(th, cfp);
return lfp_svar_get(th, cfp ? cfp->lfp : 0, key);
}
static void
vm_cfp_svar_set(rb_thread_t *th, rb_control_frame_t *cfp, VALUE key, const VALUE val)
{
cfp = vm_normal_frame(th, cfp);
lfp_svar_set(th, cfp ? cfp->lfp : 0, key, val);
}
static VALUE
vm_svar_get(VALUE key)
{
rb_thread_t *th = GET_THREAD();
return vm_cfp_svar_get(th, th->cfp, key);
}
static void
vm_svar_set(VALUE key, VALUE val)
{
rb_thread_t *th = GET_THREAD();
vm_cfp_svar_set(th, th->cfp, key, val);
}
VALUE
rb_backref_get(void)
{
return vm_svar_get(1);
}
void
rb_backref_set(VALUE val)
{
vm_svar_set(1, val);
}
VALUE
rb_lastline_get(void)
{
return vm_svar_get(0);
}
void
rb_lastline_set(VALUE val)
{
vm_svar_set(0, val);
}
/* backtrace */
int
vm_get_sourceline(const rb_control_frame_t *cfp)
{
int line_no = 0;
const rb_iseq_t *iseq = cfp->iseq;
if (RUBY_VM_NORMAL_ISEQ_P(iseq)) {
int i;
int pos = cfp->pc - cfp->iseq->iseq_encoded;
for (i = 0; i < iseq->insn_info_size; i++) {
if (iseq->insn_info_table[i].position == pos) {
line_no = iseq->insn_info_table[i - 1].line_no;
goto found;
}
}
line_no = iseq->insn_info_table[i - 1].line_no;
}
found:
return line_no;
}
static VALUE
vm_backtrace_each(rb_thread_t *th,
const rb_control_frame_t *limit_cfp, const rb_control_frame_t *cfp,
const char * file, int line_no, VALUE ary)
{
VALUE str;
while (cfp > limit_cfp) {
str = 0;
if (cfp->iseq != 0) {
if (cfp->pc != 0) {
rb_iseq_t *iseq = cfp->iseq;
line_no = vm_get_sourceline(cfp);
file = RSTRING_PTR(iseq->filename);
str = rb_sprintf("%s:%d:in `%s'",
file, line_no, RSTRING_PTR(iseq->name));
rb_ary_push(ary, str);
}
}
else if (RUBYVM_CFUNC_FRAME_P(cfp)) {
str = rb_sprintf("%s:%d:in `%s'",
file, line_no,
rb_id2name(cfp->method_id));
rb_ary_push(ary, str);
}
cfp = RUBY_VM_NEXT_CONTROL_FRAME(cfp);
}
return rb_ary_reverse(ary);
}
static inline VALUE
vm_backtrace(rb_thread_t *th, int lev)
{
VALUE ary;
const rb_control_frame_t *cfp = th->cfp;
const rb_control_frame_t *top_of_cfp = (void *)(th->stack + th->stack_size);
top_of_cfp -= 2;
if (lev < 0) {
/* TODO ?? */
ary = rb_ary_new();
}
else {
while (lev-- >= 0) {
cfp++;
if (cfp >= top_of_cfp) {
return Qnil;
}
}
ary = rb_ary_new();
}
ary = vm_backtrace_each(th, RUBY_VM_NEXT_CONTROL_FRAME(cfp),
top_of_cfp, "", 0, ary);
return ary;
}
const char *
rb_sourcefile(void)
{
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = vm_get_ruby_level_next_cfp(th, th->cfp);
if (cfp) {
return RSTRING_PTR(cfp->iseq->filename);
}
else {
return 0;
}
}
int
rb_sourceline(void)
{
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = vm_get_ruby_level_next_cfp(th, th->cfp);
if (cfp) {
return vm_get_sourceline(cfp);
}
else {
return 0;
}
}
NODE *
vm_cref(void)
{
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = vm_get_ruby_level_next_cfp(th, th->cfp);
return vm_get_cref(cfp->iseq, cfp->lfp, cfp->dfp);
}
#if 0
void
debug_cref(NODE *cref)
{
while (cref) {
dp(cref->nd_clss);
printf("%ld\n", cref->nd_visi);
cref = cref->nd_next;
}
}
#endif
VALUE
rb_vm_cbase(void)
{
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = vm_get_ruby_level_next_cfp(th, th->cfp);
return vm_get_cbase(cfp->iseq, cfp->lfp, cfp->dfp);
}
/* jump */
static VALUE
make_localjump_error(const char *mesg, VALUE value, int reason)
{
extern VALUE rb_eLocalJumpError;
VALUE exc = rb_exc_new2(rb_eLocalJumpError, mesg);
ID id;
switch (reason) {
case TAG_BREAK:
CONST_ID(id, "break");
break;
case TAG_REDO:
CONST_ID(id, "redo");
break;
case TAG_RETRY:
CONST_ID(id, "retry");
break;
case TAG_NEXT:
CONST_ID(id, "next");
break;
case TAG_RETURN:
CONST_ID(id, "return");
break;
default:
CONST_ID(id, "noreason");
break;
}
rb_iv_set(exc, "@exit_value", value);
rb_iv_set(exc, "@reason", ID2SYM(id));
return exc;
}
void
vm_localjump_error(const char *mesg, VALUE value, int reason)
{
VALUE exc = make_localjump_error(mesg, value, reason);
rb_exc_raise(exc);
}
VALUE
vm_make_jump_tag_but_local_jump(int state, VALUE val)
{
VALUE result = Qnil;
if (val == Qundef) {
val = GET_THREAD()->tag->retval;
}
switch (state) {
case 0:
break;
case TAG_RETURN:
result = make_localjump_error("unexpected return", val, state);
break;
case TAG_BREAK:
result = make_localjump_error("unexpected break", val, state);
break;
case TAG_NEXT:
result = make_localjump_error("unexpected next", val, state);
break;
case TAG_REDO:
result = make_localjump_error("unexpected redo", Qnil, state);
break;
case TAG_RETRY:
result = make_localjump_error("retry outside of rescue clause", Qnil, state);
break;
default:
break;
}
return result;
}
void
vm_jump_tag_but_local_jump(int state, VALUE val)
{
if (val != Qnil) {
VALUE exc = vm_make_jump_tag_but_local_jump(state, val);
rb_exc_raise(exc);
}
JUMP_TAG(state);
}
NORETURN(static void vm_iter_break(rb_thread_t *th));
static void
vm_iter_break(rb_thread_t *th)
{
rb_control_frame_t *cfp = th->cfp;
VALUE *dfp = GC_GUARDED_PTR_REF(*cfp->dfp);
th->state = TAG_BREAK;
th->errinfo = (VALUE)NEW_THROW_OBJECT(Qnil, (VALUE)dfp, TAG_BREAK);
TH_JUMP_TAG(th, TAG_BREAK);
}
void
rb_iter_break(void)
{
vm_iter_break(GET_THREAD());
}
/* optimization: redefine management */
static st_table *vm_opt_method_table = 0;
static void
rb_vm_check_redefinition_opt_method(const NODE *node)
{
VALUE bop;
if (st_lookup(vm_opt_method_table, (st_data_t)node, &bop)) {
ruby_vm_redefined_flag[bop] = 1;
}
}
static void
add_opt_method(VALUE klass, ID mid, VALUE bop)
{
NODE *node;
if (st_lookup(RCLASS_M_TBL(klass), mid, (void *)&node) &&
nd_type(node->nd_body->nd_body) == NODE_CFUNC) {
st_insert(vm_opt_method_table, (st_data_t)node, (st_data_t)bop);
}
else {
rb_bug("undefined optimized method: %s", rb_id2name(mid));
}
}
static void
vm_init_redefined_flag(void)
{
ID mid;
VALUE bop;
vm_opt_method_table = st_init_numtable();
#define OP(mid_, bop_) (mid = id##mid_, bop = BOP_##bop_, ruby_vm_redefined_flag[bop] = 0)
#define C(k) add_opt_method(rb_c##k, mid, bop)
OP(PLUS, PLUS), (C(Fixnum), C(Float), C(String), C(Array));
OP(MINUS, MINUS), (C(Fixnum));
OP(MULT, MULT), (C(Fixnum), C(Float));
OP(DIV, DIV), (C(Fixnum), C(Float));
OP(MOD, MOD), (C(Fixnum), C(Float));
OP(Eq, EQ), (C(Fixnum), C(Float), C(String));
OP(LT, LT), (C(Fixnum));
OP(LE, LE), (C(Fixnum));
OP(LTLT, LTLT), (C(String), C(Array));
OP(AREF, AREF), (C(Array), C(Hash));
OP(ASET, ASET), (C(Array), C(Hash));
OP(Length, LENGTH), (C(Array), C(String), C(Hash));
OP(Succ, SUCC), (C(Fixnum), C(String), C(Time));
OP(GT, GT), (C(Fixnum));
OP(GE, GE), (C(Fixnum));
#undef C
#undef OP
}
/* evaluator body */
/* finish
VMe (h1) finish
VM finish F1 F2
cfunc finish F1 F2 C1
rb_funcall finish F1 F2 C1
VMe finish F1 F2 C1
VM finish F1 F2 C1 F3
F1 - F3 : pushed by VM
C1 : pushed by send insn (CFUNC)
struct CONTROL_FRAME {
VALUE *pc; // cfp[0], program counter
VALUE *sp; // cfp[1], stack pointer
VALUE *bp; // cfp[2], base pointer
rb_iseq_t *iseq; // cfp[3], iseq
VALUE flag; // cfp[4], magic
VALUE self; // cfp[5], self
VALUE *lfp; // cfp[6], local frame pointer
VALUE *dfp; // cfp[7], dynamic frame pointer
rb_iseq_t * block_iseq; // cfp[8], block iseq
VALUE proc; // cfp[9], always 0
};
struct BLOCK {
VALUE self;
VALUE *lfp;
VALUE *dfp;
rb_iseq_t *block_iseq;
VALUE proc;
};
struct METHOD_CONTROL_FRAME {
rb_control_frame_t frame;
};
struct METHOD_FRAME {
VALUE arg0;
...
VALUE argM;
VALUE param0;
...
VALUE paramN;
VALUE cref;
VALUE special; // lfp [1]
struct block_object *block_ptr | 0x01; // lfp [0]
};
struct BLOCK_CONTROL_FRAME {
rb_control_frame_t frame;
};
struct BLOCK_FRAME {
VALUE arg0;
...
VALUE argM;
VALUE param0;
...
VALUE paramN;
VALUE cref;
VALUE *(prev_ptr | 0x01); // DFP[0]
};
struct CLASS_CONTROL_FRAME {
rb_control_frame_t frame;
};
struct CLASS_FRAME {
VALUE param0;
...
VALUE paramN;
VALUE cref;
VALUE prev_dfp; // for frame jump