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compile.c
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compile.c
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/**********************************************************************
compile.c - ruby node tree -> VM instruction sequence
$Author$
created at: 04/01/01 03:42:15 JST
Copyright (C) 2004-2007 Koichi Sasada
**********************************************************************/
#include "internal.h"
#include "ruby/re.h"
#include "encindex.h"
#include <math.h>
#define USE_INSN_STACK_INCREASE 1
#include "vm_core.h"
#include "iseq.h"
#include "insns.inc"
#include "insns_info.inc"
#include "gc.h"
#ifdef HAVE_DLADDR
# include <dlfcn.h>
#endif
#undef RUBY_UNTYPED_DATA_WARNING
#define RUBY_UNTYPED_DATA_WARNING 0
#define FIXNUM_INC(n, i) ((n)+(INT2FIX(i)&~FIXNUM_FLAG))
#define FIXNUM_OR(n, i) ((n)|INT2FIX(i))
typedef struct iseq_link_element {
enum {
ISEQ_ELEMENT_NONE,
ISEQ_ELEMENT_LABEL,
ISEQ_ELEMENT_INSN,
ISEQ_ELEMENT_ADJUST
} type;
struct iseq_link_element *next;
struct iseq_link_element *prev;
} LINK_ELEMENT;
typedef struct iseq_link_anchor {
LINK_ELEMENT anchor;
LINK_ELEMENT *last;
} LINK_ANCHOR;
typedef enum {
LABEL_RESCUE_NONE,
LABEL_RESCUE_BEG,
LABEL_RESCUE_END,
LABEL_RESCUE_TYPE_MAX
} LABEL_RESCUE_TYPE;
typedef struct iseq_label_data {
LINK_ELEMENT link;
int label_no;
int position;
int sc_state;
int sp;
int refcnt;
unsigned int set: 1;
unsigned int rescued: 2;
} LABEL;
typedef struct iseq_insn_data {
LINK_ELEMENT link;
enum ruby_vminsn_type insn_id;
unsigned int line_no;
int operand_size;
int sc_state;
VALUE *operands;
} INSN;
typedef struct iseq_adjust_data {
LINK_ELEMENT link;
LABEL *label;
int line_no;
} ADJUST;
struct ensure_range {
LABEL *begin;
LABEL *end;
struct ensure_range *next;
};
struct iseq_compile_data_ensure_node_stack {
NODE *ensure_node;
struct iseq_compile_data_ensure_node_stack *prev;
struct ensure_range *erange;
};
/**
* debug function(macro) interface depend on CPDEBUG
* if it is less than 0, runtime option is in effect.
*
* debug level:
* 0: no debug output
* 1: show node type
* 2: show node important parameters
* ...
* 5: show other parameters
* 10: show every AST array
*/
#ifndef CPDEBUG
#define CPDEBUG 0
#endif
#if CPDEBUG >= 0
#define compile_debug CPDEBUG
#else
#define compile_debug ISEQ_COMPILE_DATA(iseq)->option->debug_level
#endif
#if CPDEBUG
#define compile_debug_print_indent(level) \
ruby_debug_print_indent((level), compile_debug, gl_node_level * 2)
#define debugp(header, value) (void) \
(compile_debug_print_indent(1) && \
ruby_debug_print_value(1, compile_debug, (header), (value)))
#define debugi(header, id) (void) \
(compile_debug_print_indent(1) && \
ruby_debug_print_id(1, compile_debug, (header), (id)))
#define debugp_param(header, value) (void) \
(compile_debug_print_indent(1) && \
ruby_debug_print_value(1, compile_debug, (header), (value)))
#define debugp_verbose(header, value) (void) \
(compile_debug_print_indent(2) && \
ruby_debug_print_value(2, compile_debug, (header), (value)))
#define debugp_verbose_node(header, value) (void) \
(compile_debug_print_indent(10) && \
ruby_debug_print_value(10, compile_debug, (header), (value)))
#define debug_node_start(node) ((void) \
(compile_debug_print_indent(1) && \
(ruby_debug_print_node(1, CPDEBUG, "", (NODE *)(node)), gl_node_level)), \
gl_node_level++)
#define debug_node_end() gl_node_level --
#else
static inline ID
r_id(ID id)
{
return id;
}
static inline VALUE
r_value(VALUE value)
{
return value;
}
#define debugi(header, id) r_id(id)
#define debugp(header, value) r_value(value)
#define debugp_verbose(header, value) r_value(value)
#define debugp_verbose_node(header, value) r_value(value)
#define debugp_param(header, value) r_value(value)
#define debug_node_start(node) ((void)0)
#define debug_node_end() ((void)0)
#endif
#if CPDEBUG > 1 || CPDEBUG < 0
#define printf ruby_debug_printf
#define debugs if (compile_debug_print_indent(1)) ruby_debug_printf
#define debug_compile(msg, v) ((void)(compile_debug_print_indent(1) && fputs((msg), stderr)), (v))
#else
#define debugs if(0)printf
#define debug_compile(msg, v) (v)
#endif
/* create new label */
#define NEW_LABEL(l) new_label_body(iseq, (l))
#define iseq_path(iseq) ((iseq)->body->location.path)
#define iseq_absolute_path(iseq) ((iseq)->body->location.absolute_path)
#define NEW_ISEQ(node, name, type, line_no) \
new_child_iseq(iseq, (node), rb_fstring(name), 0, (type), (line_no))
#define NEW_CHILD_ISEQ(node, name, type, line_no) \
new_child_iseq(iseq, (node), rb_fstring(name), iseq, (type), (line_no))
/* add instructions */
#define ADD_SEQ(seq1, seq2) \
APPEND_LIST((seq1), (seq2))
/* add an instruction */
#define ADD_INSN(seq, line, insn) \
ADD_ELEM((seq), (LINK_ELEMENT *) new_insn_body(iseq, (line), BIN(insn), 0))
/* insert an instruction before prev */
#define INSERT_BEFORE_INSN(prev, line, insn) \
INSERT_ELEM_PREV(&(prev)->link, (LINK_ELEMENT *) new_insn_body(iseq, (line), BIN(insn), 0))
/* add an instruction with some operands (1, 2, 3, 5) */
#define ADD_INSN1(seq, line, insn, op1) \
ADD_ELEM((seq), (LINK_ELEMENT *) \
new_insn_body(iseq, (line), BIN(insn), 1, (VALUE)(op1)))
/* insert an instruction with some operands (1, 2, 3, 5) before prev */
#define INSERT_BEFORE_INSN1(prev, line, insn, op1) \
INSERT_ELEM_PREV(&(prev)->link, (LINK_ELEMENT *) \
new_insn_body(iseq, (line), BIN(insn), 1, (VALUE)(op1)))
#define LABEL_REF(label) ((label)->refcnt++)
/* add an instruction with label operand (alias of ADD_INSN1) */
#define ADD_INSNL(seq, line, insn, label) (ADD_INSN1(seq, line, insn, label), LABEL_REF(label))
#define ADD_INSN2(seq, line, insn, op1, op2) \
ADD_ELEM((seq), (LINK_ELEMENT *) \
new_insn_body(iseq, (line), BIN(insn), 2, (VALUE)(op1), (VALUE)(op2)))
#define ADD_INSN3(seq, line, insn, op1, op2, op3) \
ADD_ELEM((seq), (LINK_ELEMENT *) \
new_insn_body(iseq, (line), BIN(insn), 3, (VALUE)(op1), (VALUE)(op2), (VALUE)(op3)))
/* Specific Insn factory */
#define ADD_SEND(seq, line, id, argc) \
ADD_SEND_R((seq), (line), (id), (argc), NULL, (VALUE)INT2FIX(0), NULL)
#define ADD_SEND_WITH_FLAG(seq, line, id, argc, flag) \
ADD_SEND_R((seq), (line), (id), (argc), NULL, (VALUE)(flag), NULL)
#define ADD_SEND_WITH_BLOCK(seq, line, id, argc, block) \
ADD_SEND_R((seq), (line), (id), (argc), (block), (VALUE)INT2FIX(0), NULL)
#define ADD_CALL_RECEIVER(seq, line) \
ADD_INSN((seq), (line), putself)
#define ADD_CALL(seq, line, id, argc) \
ADD_SEND_R((seq), (line), (id), (argc), NULL, (VALUE)INT2FIX(VM_CALL_FCALL), NULL)
#define ADD_CALL_WITH_BLOCK(seq, line, id, argc, block) \
ADD_SEND_R((seq), (line), (id), (argc), (block), (VALUE)INT2FIX(VM_CALL_FCALL), NULL)
#define ADD_SEND_R(seq, line, id, argc, block, flag, keywords) \
ADD_ELEM((seq), (LINK_ELEMENT *) new_insn_send(iseq, (line), (id), (VALUE)(argc), (block), (VALUE)(flag), (keywords)))
#define ADD_TRACE(seq, line, event) \
do { \
if ((event) == RUBY_EVENT_LINE && ISEQ_COVERAGE(iseq) && \
(line) != ISEQ_COMPILE_DATA(iseq)->last_coverable_line) { \
RARRAY_ASET(ISEQ_COVERAGE(iseq), (line) - 1, INT2FIX(0)); \
ISEQ_COMPILE_DATA(iseq)->last_coverable_line = (line); \
ADD_INSN1((seq), (line), trace, INT2FIX(RUBY_EVENT_COVERAGE)); \
} \
if (ISEQ_COMPILE_DATA(iseq)->option->trace_instruction) { \
ADD_INSN1((seq), (line), trace, INT2FIX(event)); \
} \
} while (0)
/* add label */
#define ADD_LABEL(seq, label) \
ADD_ELEM((seq), (LINK_ELEMENT *) (label))
#define APPEND_LABEL(seq, before, label) \
APPEND_ELEM((seq), (before), (LINK_ELEMENT *) (label))
#define ADD_ADJUST(seq, line, label) \
ADD_ELEM((seq), (LINK_ELEMENT *) new_adjust_body(iseq, (label), (line)))
#define ADD_ADJUST_RESTORE(seq, label) \
ADD_ELEM((seq), (LINK_ELEMENT *) new_adjust_body(iseq, (label), -1))
#define ADD_CATCH_ENTRY(type, ls, le, iseqv, lc) do { \
VALUE _e = rb_ary_new3(5, (type), \
(VALUE)(ls) | 1, (VALUE)(le) | 1, \
(VALUE)(iseqv), (VALUE)(lc) | 1); \
if (ls) LABEL_REF(ls); \
if (le) LABEL_REF(le); \
if (lc) LABEL_REF(lc); \
rb_ary_push(ISEQ_COMPILE_DATA(iseq)->catch_table_ary, freeze_hide_obj(_e)); \
} while (0)
/* compile node */
#define COMPILE(anchor, desc, node) \
(debug_compile("== " desc "\n", \
iseq_compile_each(iseq, (anchor), (node), 0)))
/* compile node, this node's value will be popped */
#define COMPILE_POPED(anchor, desc, node) \
(debug_compile("== " desc "\n", \
iseq_compile_each(iseq, (anchor), (node), 1)))
/* compile node, which is popped when 'poped' is true */
#define COMPILE_(anchor, desc, node, poped) \
(debug_compile("== " desc "\n", \
iseq_compile_each(iseq, (anchor), (node), (poped))))
#define COMPILE_RECV(anchor, desc, node) \
(private_recv_p(node) ? \
(ADD_INSN(anchor, nd_line(node), putself), VM_CALL_FCALL) : \
(COMPILE(anchor, desc, node->nd_recv), 0))
#define OPERAND_AT(insn, idx) \
(((INSN*)(insn))->operands[(idx)])
#define INSN_OF(insn) \
(((INSN*)(insn))->insn_id)
/* error */
typedef void (*compile_error_func)(VALUE, int, const char *, ...);
static void
append_compile_error(VALUE file, int line, const char *fmt, ...)
{
VALUE err_info = rb_errinfo();
VALUE str = rb_attr_get(err_info, idMesg);
va_list args;
if (RSTRING_LEN(str)) rb_str_cat2(str, "\n");
if (file) {
rb_str_concat(str, file);
if (line) rb_str_catf(str, ":%d", line);
rb_str_cat2(str, ": ");
}
va_start(args, fmt);
rb_str_vcatf(str, fmt, args);
va_end(args);
}
NOINLINE(static compile_error_func prepare_compile_error(rb_iseq_t *iseq));
static compile_error_func
prepare_compile_error(rb_iseq_t *iseq)
{
VALUE err_info = ISEQ_COMPILE_DATA(iseq)->err_info;
if (compile_debug) return &rb_compile_bug_str;
if (NIL_P(err_info)) {
err_info = rb_exc_new_cstr(rb_eSyntaxError, "");
RB_OBJ_WRITE(iseq, &ISEQ_COMPILE_DATA(iseq)->err_info, err_info);
}
rb_set_errinfo(err_info);
return &append_compile_error;
}
#define COMPILE_ERROR prepare_compile_error(iseq)
#define ERROR_ARGS_AT(n) ruby_sourcefile_string, nd_line(n),
#define ERROR_ARGS ERROR_ARGS_AT(node)
#define EXPECT_NODE(prefix, node, ndtype) \
do { \
NODE *error_node = (node); \
enum node_type error_type = nd_type(error_node); \
if (error_type != (ndtype)) { \
rb_compile_bug_str(ERROR_ARGS_AT(error_node) \
prefix ": " #ndtype " is expected, but %s", \
ruby_node_name(error_type)); \
} \
} while (0)
#define EXPECT_NODE_NONULL(prefix, parent, ndtype) \
do { \
rb_compile_bug_str(ERROR_ARGS_AT(parent) \
prefix ": must be " #ndtype ", but 0"); \
} while (0)
#define UNKNOWN_NODE(prefix, node) \
do { \
NODE *error_node = (node); \
rb_compile_bug_str(ERROR_ARGS_AT(error_node) prefix ": unknown node (%s)", \
ruby_node_name(nd_type(error_node))); \
} while (0)
#define COMPILE_OK 1
#define COMPILE_NG 0
/* leave name uninitialized so that compiler warn if INIT_ANCHOR is
* missing */
#define DECL_ANCHOR(name) \
LINK_ANCHOR *name, name##_body__ = {{0,},}
#define INIT_ANCHOR(name) \
(name##_body__.last = &name##_body__.anchor, name = &name##_body__)
static inline VALUE
freeze_hide_obj(VALUE obj)
{
OBJ_FREEZE(obj);
RBASIC_CLEAR_CLASS(obj);
return obj;
}
#include "optinsn.inc"
#if OPT_INSTRUCTIONS_UNIFICATION
#include "optunifs.inc"
#endif
/* for debug */
#if CPDEBUG < 0
#define ISEQ_ARG iseq,
#define ISEQ_ARG_DECLARE rb_iseq_t *iseq,
#else
#define ISEQ_ARG
#define ISEQ_ARG_DECLARE
#endif
#if CPDEBUG
#define gl_node_level ISEQ_COMPILE_DATA(iseq)->node_level
#endif
static void dump_disasm_list(LINK_ELEMENT *elem);
static int insn_data_length(INSN *iobj);
static int calc_sp_depth(int depth, INSN *iobj);
static INSN *new_insn_body(rb_iseq_t *iseq, int line_no, enum ruby_vminsn_type insn_id, int argc, ...);
static LABEL *new_label_body(rb_iseq_t *iseq, long line);
static ADJUST *new_adjust_body(rb_iseq_t *iseq, LABEL *label, int line);
static int iseq_compile_each(rb_iseq_t *iseq, LINK_ANCHOR *anchor, NODE * n, int);
static int iseq_setup(rb_iseq_t *iseq, LINK_ANCHOR *anchor);
static int iseq_optimize(rb_iseq_t *iseq, LINK_ANCHOR *anchor);
static int iseq_insns_unification(rb_iseq_t *iseq, LINK_ANCHOR *anchor);
static int iseq_set_local_table(rb_iseq_t *iseq, const ID *tbl);
static int iseq_set_exception_local_table(rb_iseq_t *iseq);
static int iseq_set_arguments(rb_iseq_t *iseq, LINK_ANCHOR *anchor, NODE * node);
static int iseq_set_sequence_stackcaching(rb_iseq_t *iseq, LINK_ANCHOR *anchor);
static int iseq_set_sequence(rb_iseq_t *iseq, LINK_ANCHOR *anchor);
static int iseq_set_exception_table(rb_iseq_t *iseq);
static int iseq_set_optargs_table(rb_iseq_t *iseq);
/*
* To make Array to LinkedList, use link_anchor
*/
static void
verify_list(ISEQ_ARG_DECLARE const char *info, LINK_ANCHOR *anchor)
{
#if CPDEBUG
int flag = 0;
LINK_ELEMENT *list, *plist;
if (!compile_debug) return;
list = anchor->anchor.next;
plist = &anchor->anchor;
while (list) {
if (plist != list->prev) {
flag += 1;
}
plist = list;
list = list->next;
}
if (anchor->last != plist && anchor->last != 0) {
flag |= 0x70000;
}
if (flag != 0) {
rb_bug("list verify error: %08x (%s)", flag, info);
}
#endif
}
#if CPDEBUG < 0
#define verify_list(info, anchor) verify_list(iseq, (info), (anchor))
#endif
/*
* elem1, elem2 => elem1, elem2, elem
*/
static void
ADD_ELEM(ISEQ_ARG_DECLARE LINK_ANCHOR *anchor, LINK_ELEMENT *elem)
{
elem->prev = anchor->last;
anchor->last->next = elem;
anchor->last = elem;
verify_list("add", anchor);
}
/*
* elem1, before, elem2 => elem1, before, elem, elem2
*/
static void
APPEND_ELEM(ISEQ_ARG_DECLARE LINK_ANCHOR *anchor, LINK_ELEMENT *before, LINK_ELEMENT *elem)
{
elem->prev = before;
elem->next = before->next;
elem->next->prev = elem;
before->next = elem;
if (before == anchor->last) anchor->last = elem;
verify_list("add", anchor);
}
#if CPDEBUG < 0
#define ADD_ELEM(anchor, elem) ADD_ELEM(iseq, (anchor), (elem))
#define APPEND_ELEM(anchor, before, elem) APPEND_ELEM(iseq, (anchor), (before), (elem))
#endif
static int
iseq_add_mark_object(const rb_iseq_t *iseq, VALUE v)
{
if (!SPECIAL_CONST_P(v)) {
rb_iseq_add_mark_object(iseq, v);
}
return COMPILE_OK;
}
#define ruby_sourcefile_string (iseq->body->location.path)
#define ruby_sourcefile RSTRING_PTR(iseq->body->location.path)
static int
iseq_add_mark_object_compile_time(const rb_iseq_t *iseq, VALUE v)
{
if (!SPECIAL_CONST_P(v)) {
rb_ary_push(ISEQ_COMPILE_DATA(iseq)->mark_ary, v);
}
return COMPILE_OK;
}
static int
validate_label(st_data_t name, st_data_t label, st_data_t arg)
{
rb_iseq_t *iseq = (rb_iseq_t *)arg;
LABEL *lobj = (LABEL *)label;
if (!lobj->link.next) {
do {
COMPILE_ERROR(ruby_sourcefile_string, lobj->position,
"%"PRIsVALUE": undefined label",
rb_id2str((ID)name));
} while (0);
}
return ST_CONTINUE;
}
static void
validate_labels(rb_iseq_t *iseq, st_table *labels_table)
{
st_foreach(labels_table, validate_label, (st_data_t)iseq);
st_free_table(labels_table);
if (!NIL_P(ISEQ_COMPILE_DATA(iseq)->err_info)) {
rb_exc_raise(ISEQ_COMPILE_DATA(iseq)->err_info);
}
}
VALUE
rb_iseq_compile_node(rb_iseq_t *iseq, NODE *node)
{
DECL_ANCHOR(ret);
INIT_ANCHOR(ret);
if (node == 0) {
COMPILE(ret, "nil", node);
iseq_set_local_table(iseq, 0);
}
else if (nd_type(node) == NODE_SCOPE) {
/* iseq type of top, method, class, block */
iseq_set_local_table(iseq, node->nd_tbl);
iseq_set_arguments(iseq, ret, node->nd_args);
switch (iseq->body->type) {
case ISEQ_TYPE_BLOCK:
{
LABEL *start = ISEQ_COMPILE_DATA(iseq)->start_label = NEW_LABEL(0);
LABEL *end = ISEQ_COMPILE_DATA(iseq)->end_label = NEW_LABEL(0);
start->rescued = LABEL_RESCUE_BEG;
end->rescued = LABEL_RESCUE_END;
ADD_TRACE(ret, FIX2INT(iseq->body->location.first_lineno), RUBY_EVENT_B_CALL);
ADD_LABEL(ret, start);
COMPILE(ret, "block body", node->nd_body);
ADD_LABEL(ret, end);
ADD_TRACE(ret, nd_line(node), RUBY_EVENT_B_RETURN);
/* wide range catch handler must put at last */
ADD_CATCH_ENTRY(CATCH_TYPE_REDO, start, end, 0, start);
ADD_CATCH_ENTRY(CATCH_TYPE_NEXT, start, end, 0, end);
break;
}
case ISEQ_TYPE_CLASS:
{
ADD_TRACE(ret, FIX2INT(iseq->body->location.first_lineno), RUBY_EVENT_CLASS);
COMPILE(ret, "scoped node", node->nd_body);
ADD_TRACE(ret, nd_line(node), RUBY_EVENT_END);
break;
}
case ISEQ_TYPE_METHOD:
{
ADD_TRACE(ret, FIX2INT(iseq->body->location.first_lineno), RUBY_EVENT_CALL);
COMPILE(ret, "scoped node", node->nd_body);
ADD_TRACE(ret, nd_line(node), RUBY_EVENT_RETURN);
break;
}
default: {
COMPILE(ret, "scoped node", node->nd_body);
break;
}
}
}
else if (RB_TYPE_P((VALUE)node, T_IMEMO)) {
const struct vm_ifunc *ifunc = (struct vm_ifunc *)node;
/* user callback */
(*ifunc->func)(iseq, ret, ifunc->data);
}
else {
switch (iseq->body->type) {
case ISEQ_TYPE_METHOD:
case ISEQ_TYPE_CLASS:
case ISEQ_TYPE_BLOCK:
case ISEQ_TYPE_EVAL:
case ISEQ_TYPE_MAIN:
case ISEQ_TYPE_TOP:
COMPILE_ERROR(ERROR_ARGS "compile/should not be reached: %s:%d",
__FILE__, __LINE__);
return COMPILE_NG;
case ISEQ_TYPE_RESCUE:
iseq_set_exception_local_table(iseq);
COMPILE(ret, "rescue", node);
break;
case ISEQ_TYPE_ENSURE:
iseq_set_exception_local_table(iseq);
COMPILE_POPED(ret, "ensure", node);
break;
case ISEQ_TYPE_DEFINED_GUARD:
iseq_set_exception_local_table(iseq);
COMPILE(ret, "defined guard", node);
break;
default:
rb_compile_bug_str(ERROR_ARGS "unknown scope");
}
}
if (iseq->body->type == ISEQ_TYPE_RESCUE || iseq->body->type == ISEQ_TYPE_ENSURE) {
ADD_INSN2(ret, 0, getlocal, INT2FIX(2), INT2FIX(0));
ADD_INSN1(ret, 0, throw, INT2FIX(0) /* continue throw */ );
}
else {
ADD_INSN(ret, ISEQ_COMPILE_DATA(iseq)->last_line, leave);
}
#if SUPPORT_JOKE
if (ISEQ_COMPILE_DATA(iseq)->labels_table) {
st_table *labels_table = ISEQ_COMPILE_DATA(iseq)->labels_table;
ISEQ_COMPILE_DATA(iseq)->labels_table = 0;
validate_labels(iseq, labels_table);
}
#endif
return iseq_setup(iseq, ret);
}
int
rb_iseq_translate_threaded_code(rb_iseq_t *iseq)
{
#if OPT_DIRECT_THREADED_CODE || OPT_CALL_THREADED_CODE
const void * const *table = rb_vm_get_insns_address_table();
unsigned int i;
VALUE *encoded = (VALUE *)iseq->body->iseq_encoded;
for (i = 0; i < iseq->body->iseq_size; /* */ ) {
int insn = (int)iseq->body->iseq_encoded[i];
int len = insn_len(insn);
encoded[i] = (VALUE)table[insn];
i += len;
}
#endif
return COMPILE_OK;
}
#if OPT_DIRECT_THREADED_CODE || OPT_CALL_THREADED_CODE
static int
rb_vm_insn_addr2insn(const void *addr) /* cold path */
{
int insn;
const void * const *table = rb_vm_get_insns_address_table();
for (insn = 0; insn < VM_INSTRUCTION_SIZE; insn++) {
if (table[insn] == addr) {
return insn;
}
}
rb_bug("rb_vm_insn_addr2insn: invalid insn address: %p", addr);
}
#endif
VALUE *
rb_iseq_original_iseq(const rb_iseq_t *iseq) /* cold path */
{
VALUE *original_code;
if (ISEQ_ORIGINAL_ISEQ(iseq)) return ISEQ_ORIGINAL_ISEQ(iseq);
original_code = ISEQ_ORIGINAL_ISEQ_ALLOC(iseq, iseq->body->iseq_size);
MEMCPY(original_code, iseq->body->iseq_encoded, VALUE, iseq->body->iseq_size);
#if OPT_DIRECT_THREADED_CODE || OPT_CALL_THREADED_CODE
{
unsigned int i;
for (i = 0; i < iseq->body->iseq_size; /* */ ) {
const void *addr = (const void *)original_code[i];
const int insn = rb_vm_insn_addr2insn(addr);
original_code[i] = insn;
i += insn_len(insn);
}
}
#endif
return original_code;
}
/*********************************************/
/* definition of data structure for compiler */
/*********************************************/
/*
* On 32-bit SPARC, GCC by default generates SPARC V7 code that may require
* 8-byte word alignment. On the other hand, Oracle Solaris Studio seems to
* generate SPARCV8PLUS code with unaligned memory access instructions.
* That is why the STRICT_ALIGNMENT is defined only with GCC.
*/
#if defined(__sparc) && SIZEOF_VOIDP == 4 && defined(__GNUC__)
#define STRICT_ALIGNMENT
#endif
#ifdef STRICT_ALIGNMENT
#if defined(HAVE_TRUE_LONG_LONG) && SIZEOF_LONG_LONG > SIZEOF_VALUE
#define ALIGNMENT_SIZE SIZEOF_LONG_LONG
#else
#define ALIGNMENT_SIZE SIZEOF_VALUE
#endif
#define PADDING_SIZE_MAX ((size_t)((ALIGNMENT_SIZE) - 1))
#define ALIGNMENT_SIZE_MASK PADDING_SIZE_MAX
/* Note: ALIGNMENT_SIZE == (2 ** N) is expected. */
#else
#define PADDING_SIZE_MAX 0
#endif /* STRICT_ALIGNMENT */
#ifdef STRICT_ALIGNMENT
/* calculate padding size for aligned memory access */
static size_t
calc_padding(void *ptr, size_t size)
{
size_t mis;
size_t padding = 0;
mis = (size_t)ptr & ALIGNMENT_SIZE_MASK;
if (mis > 0) {
padding = ALIGNMENT_SIZE - mis;
}
/*
* On 32-bit sparc or equivalents, when a single VALUE is requested
* and padding == sizeof(VALUE), it is clear that no padding is needed.
*/
#if ALIGNMENT_SIZE > SIZEOF_VALUE
if (size == sizeof(VALUE) && padding == sizeof(VALUE)) {
padding = 0;
}
#endif
return padding;
}
#endif /* STRICT_ALIGNMENT */
static void *
compile_data_alloc(rb_iseq_t *iseq, size_t size)
{
void *ptr = 0;
struct iseq_compile_data_storage *storage =
ISEQ_COMPILE_DATA(iseq)->storage_current;
#ifdef STRICT_ALIGNMENT
size_t padding = calc_padding((void *)&storage->buff[storage->pos], size);
#else
const size_t padding = 0; /* expected to be optimized by compiler */
#endif /* STRICT_ALIGNMENT */
if (size >= INT_MAX - padding) rb_memerror();
if (storage->pos + size + padding > storage->size) {
unsigned int alloc_size = storage->size;
while (alloc_size < size + PADDING_SIZE_MAX) {
if (alloc_size >= INT_MAX / 2) rb_memerror();
alloc_size *= 2;
}
storage->next = (void *)ALLOC_N(char, alloc_size +
SIZEOF_ISEQ_COMPILE_DATA_STORAGE);
storage = ISEQ_COMPILE_DATA(iseq)->storage_current = storage->next;
storage->next = 0;
storage->pos = 0;
storage->size = alloc_size;
#ifdef STRICT_ALIGNMENT
padding = calc_padding((void *)&storage->buff[storage->pos], size);
#endif /* STRICT_ALIGNMENT */
}
#ifdef STRICT_ALIGNMENT
storage->pos += (int)padding;
#endif /* STRICT_ALIGNMENT */
ptr = (void *)&storage->buff[storage->pos];
storage->pos += (int)size;
return ptr;
}
static INSN *
compile_data_alloc_insn(rb_iseq_t *iseq)
{
return (INSN *)compile_data_alloc(iseq, sizeof(INSN));
}
static LABEL *
compile_data_alloc_label(rb_iseq_t *iseq)
{
return (LABEL *)compile_data_alloc(iseq, sizeof(LABEL));
}
static ADJUST *
compile_data_alloc_adjust(rb_iseq_t *iseq)
{
return (ADJUST *)compile_data_alloc(iseq, sizeof(ADJUST));
}
/*
* elem1, elemX => elem1, elem2, elemX
*/
static void
INSERT_ELEM_NEXT(LINK_ELEMENT *elem1, LINK_ELEMENT *elem2)
{
elem2->next = elem1->next;
elem2->prev = elem1;
elem1->next = elem2;
if (elem2->next) {
elem2->next->prev = elem2;
}
}
/*
* elem1, elemX => elemX, elem2, elem1
*/
static void
INSERT_ELEM_PREV(LINK_ELEMENT *elem1, LINK_ELEMENT *elem2)
{
elem2->prev = elem1->prev;
elem2->next = elem1;
elem1->prev = elem2;
if (elem2->prev) {
elem2->prev->next = elem2;
}
}
/*
* elemX, elem1, elemY => elemX, elem2, elemY
*/
static void
REPLACE_ELEM(LINK_ELEMENT *elem1, LINK_ELEMENT *elem2)
{
elem2->prev = elem1->prev;
elem2->next = elem1->next;
if (elem1->prev) {
elem1->prev->next = elem2;
}
if (elem1->next) {
elem1->next->prev = elem2;
}
}
static void
REMOVE_ELEM(LINK_ELEMENT *elem)
{
elem->prev->next = elem->next;
if (elem->next) {
elem->next->prev = elem->prev;
}
}
static LINK_ELEMENT *
FIRST_ELEMENT(LINK_ANCHOR *anchor)
{
return anchor->anchor.next;
}
static LINK_ELEMENT *
LAST_ELEMENT(LINK_ANCHOR *anchor)
{
return anchor->last;
}
static LINK_ELEMENT *
POP_ELEMENT(ISEQ_ARG_DECLARE LINK_ANCHOR *anchor)
{
LINK_ELEMENT *elem = anchor->last;
anchor->last = anchor->last->prev;
anchor->last->next = 0;
verify_list("pop", anchor);
return elem;
}
#if CPDEBUG < 0
#define POP_ELEMENT(anchor) POP_ELEMENT(iseq, (anchor))
#endif
static int
LIST_SIZE_ZERO(LINK_ANCHOR *anchor)
{
if (anchor->anchor.next == 0) {
return 1;
}
else {
return 0;
}
}
/*
* anc1: e1, e2, e3
* anc2: e4, e5
*#=>
* anc1: e1, e2, e3, e4, e5
* anc2: e4, e5 (broken)
*/
static void
APPEND_LIST(ISEQ_ARG_DECLARE LINK_ANCHOR *anc1, LINK_ANCHOR *anc2)
{
if (anc2->anchor.next) {
anc1->last->next = anc2->anchor.next;
anc2->anchor.next->prev = anc1->last;
anc1->last = anc2->last;
}
verify_list("append", anc1);
}
#if CPDEBUG < 0
#define APPEND_LIST(anc1, anc2) APPEND_LIST(iseq, (anc1), (anc2))
#endif
/*
* anc1: e1, e2, e3
* anc2: e4, e5
*#=>
* anc1: e4, e5, e1, e2, e3
* anc2: e4, e5 (broken)
*/
static void
INSERT_LIST(ISEQ_ARG_DECLARE LINK_ANCHOR *anc1, LINK_ANCHOR *anc2)
{
if (anc2->anchor.next) {
LINK_ELEMENT *first = anc1->anchor.next;
anc1->anchor.next = anc2->anchor.next;
anc1->anchor.next->prev = &anc1->anchor;
anc2->last->next = first;
if (first) {
first->prev = anc2->last;
}
else {
anc1->last = anc2->last;
}
}
verify_list("append", anc1);
}
#if CPDEBUG < 0
#define INSERT_LIST(anc1, anc2) INSERT_LIST(iseq, (anc1), (anc2))
#endif
#if CPDEBUG && 0
static void
debug_list(ISEQ_ARG_DECLARE LINK_ANCHOR *anchor)
{
LINK_ELEMENT *list = FIRST_ELEMENT(anchor);
printf("----\n");
printf("anch: %p, frst: %p, last: %p\n", &anchor->anchor,
anchor->anchor.next, anchor->last);
while (list) {
printf("curr: %p, next: %p, prev: %p, type: %d\n", list, list->next,
list->prev, FIX2INT(list->type));
list = list->next;
}
printf("----\n");
dump_disasm_list(anchor->anchor.next);
verify_list("debug list", anchor);
}
#if CPDEBUG < 0
#define debug_list(anc) debug_list(iseq, (anc))
#endif
#endif
static LABEL *
new_label_body(rb_iseq_t *iseq, long line)
{
LABEL *labelobj = compile_data_alloc_label(iseq);
labelobj->link.type = ISEQ_ELEMENT_LABEL;
labelobj->link.next = 0;
labelobj->label_no = ISEQ_COMPILE_DATA(iseq)->label_no++;
labelobj->sc_state = 0;
labelobj->sp = -1;
labelobj->refcnt = 0;