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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 "ruby/internal/config.h"
#include <math.h>
#ifdef HAVE_DLADDR
# include <dlfcn.h>
#endif
#include "encindex.h"
#include "gc.h"
#include "id_table.h"
#include "internal.h"
#include "internal/array.h"
#include "internal/compile.h"
#include "internal/complex.h"
#include "internal/encoding.h"
#include "internal/error.h"
#include "internal/hash.h"
#include "internal/numeric.h"
#include "internal/object.h"
#include "internal/rational.h"
#include "internal/re.h"
#include "internal/symbol.h"
#include "internal/thread.h"
#include "internal/variable.h"
#include "iseq.h"
#include "ruby/re.h"
#include "ruby/util.h"
#include "vm_core.h"
#include "vm_callinfo.h"
#include "vm_debug.h"
#include "builtin.h"
#include "insns.inc"
#include "insns_info.inc"
#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_ANCHOR,
ISEQ_ELEMENT_LABEL,
ISEQ_ELEMENT_INSN,
ISEQ_ELEMENT_ADJUST,
ISEQ_ELEMENT_TRACE,
} 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;
unsigned int unremovable: 1;
} LABEL;
typedef struct iseq_insn_data {
LINK_ELEMENT link;
enum ruby_vminsn_type insn_id;
int operand_size;
int sc_state;
VALUE *operands;
struct {
int line_no;
int node_id;
rb_event_flag_t events;
} insn_info;
} INSN;
typedef struct iseq_adjust_data {
LINK_ELEMENT link;
LABEL *label;
int line_no;
} ADJUST;
typedef struct iseq_trace_data {
LINK_ELEMENT link;
rb_event_flag_t event;
long data;
} TRACE;
struct ensure_range {
LABEL *begin;
LABEL *end;
struct ensure_range *next;
};
struct iseq_compile_data_ensure_node_stack {
const NODE *ensure_node;
struct iseq_compile_data_ensure_node_stack *prev;
struct ensure_range *erange;
};
const ID rb_iseq_shared_exc_local_tbl[] = {idERROR_INFO};
/**
* 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, "", (const NODE *)(node)), gl_node_level)), \
gl_node_level++)
#define debug_node_end() gl_node_level --
#else
#define debugi(header, id) ((void)0)
#define debugp(header, value) ((void)0)
#define debugp_verbose(header, value) ((void)0)
#define debugp_verbose_node(header, value) ((void)0)
#define debugp_param(header, value) ((void)0)
#define debug_node_start(node) ((void)0)
#define debug_node_end() ((void)0)
#endif
#if CPDEBUG > 1 || CPDEBUG < 0
#undef printf
#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
#define LVAR_ERRINFO (1)
/* create new label */
#define NEW_LABEL(l) new_label_body(iseq, (l))
#define LABEL_FORMAT "<L%03d>"
#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_node, insn) \
ADD_ELEM((seq), (LINK_ELEMENT *) new_insn_body(iseq, (line_node), BIN(insn), 0))
/* insert an instruction before next */
#define INSERT_BEFORE_INSN(next, line_node, insn) \
ELEM_INSERT_PREV(&(next)->link, (LINK_ELEMENT *) new_insn_body(iseq, (line_node), BIN(insn), 0))
/* insert an instruction after prev */
#define INSERT_AFTER_INSN(prev, line_node, insn) \
ELEM_INSERT_NEXT(&(prev)->link, (LINK_ELEMENT *) new_insn_body(iseq, (line_node), BIN(insn), 0))
/* add an instruction with some operands (1, 2, 3, 5) */
#define ADD_INSN1(seq, line_node, insn, op1) \
ADD_ELEM((seq), (LINK_ELEMENT *) \
new_insn_body(iseq, (line_node), BIN(insn), 1, (VALUE)(op1)))
/* insert an instruction with some operands (1, 2, 3, 5) before next */
#define INSERT_BEFORE_INSN1(next, line_node, insn, op1) \
ELEM_INSERT_PREV(&(next)->link, (LINK_ELEMENT *) \
new_insn_body(iseq, (line_node), BIN(insn), 1, (VALUE)(op1)))
/* insert an instruction with some operands (1, 2, 3, 5) after prev */
#define INSERT_AFTER_INSN1(prev, line_node, insn, op1) \
ELEM_INSERT_NEXT(&(prev)->link, (LINK_ELEMENT *) \
new_insn_body(iseq, (line_node), 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_node, insn, label) (ADD_INSN1(seq, line_node, insn, label), LABEL_REF(label))
#define ADD_INSN2(seq, line_node, insn, op1, op2) \
ADD_ELEM((seq), (LINK_ELEMENT *) \
new_insn_body(iseq, (line_node), BIN(insn), 2, (VALUE)(op1), (VALUE)(op2)))
#define ADD_INSN3(seq, line_node, insn, op1, op2, op3) \
ADD_ELEM((seq), (LINK_ELEMENT *) \
new_insn_body(iseq, (line_node), BIN(insn), 3, (VALUE)(op1), (VALUE)(op2), (VALUE)(op3)))
/* Specific Insn factory */
#define ADD_SEND(seq, line_node, id, argc) \
ADD_SEND_R((seq), (line_node), (id), (argc), NULL, (VALUE)INT2FIX(0), NULL)
#define ADD_SEND_WITH_FLAG(seq, line_node, id, argc, flag) \
ADD_SEND_R((seq), (line_node), (id), (argc), NULL, (VALUE)(flag), NULL)
#define ADD_SEND_WITH_BLOCK(seq, line_node, id, argc, block) \
ADD_SEND_R((seq), (line_node), (id), (argc), (block), (VALUE)INT2FIX(0), NULL)
#define ADD_CALL_RECEIVER(seq, line_node) \
ADD_INSN((seq), (line_node), putself)
#define ADD_CALL(seq, line_node, id, argc) \
ADD_SEND_R((seq), (line_node), (id), (argc), NULL, (VALUE)INT2FIX(VM_CALL_FCALL), NULL)
#define ADD_CALL_WITH_BLOCK(seq, line_node, id, argc, block) \
ADD_SEND_R((seq), (line_node), (id), (argc), (block), (VALUE)INT2FIX(VM_CALL_FCALL), NULL)
#define ADD_SEND_R(seq, line_node, id, argc, block, flag, keywords) \
ADD_ELEM((seq), (LINK_ELEMENT *) new_insn_send(iseq, (line_node), (id), (VALUE)(argc), (block), (VALUE)(flag), (keywords)))
#define ADD_TRACE(seq, event) \
ADD_ELEM((seq), (LINK_ELEMENT *)new_trace_body(iseq, (event), 0))
#define ADD_TRACE_WITH_DATA(seq, event, data) \
ADD_ELEM((seq), (LINK_ELEMENT *)new_trace_body(iseq, (event), (data)))
static void iseq_add_getlocal(rb_iseq_t *iseq, LINK_ANCHOR *const seq, const NODE *const line_node, int idx, int level);
static void iseq_add_setlocal(rb_iseq_t *iseq, LINK_ANCHOR *const seq, const NODE *const line_node, int idx, int level);
#define ADD_GETLOCAL(seq, line_node, idx, level) iseq_add_getlocal(iseq, (seq), (line_node), (idx), (level))
#define ADD_SETLOCAL(seq, line_node, idx, level) iseq_add_setlocal(iseq, (seq), (line_node), (idx), (level))
/* 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_node, label) \
ADD_ELEM((seq), (LINK_ELEMENT *) new_adjust_body(iseq, (label), nd_line(line_node)))
#define ADD_ADJUST_RESTORE(seq, label) \
ADD_ELEM((seq), (LINK_ELEMENT *) new_adjust_body(iseq, (label), -1))
#define LABEL_UNREMOVABLE(label) \
((label) ? (LABEL_REF(label), (label)->unremovable=1) : 0)
#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); \
LABEL_UNREMOVABLE(ls); \
LABEL_REF(le); \
LABEL_REF(lc); \
if (NIL_P(ISEQ_COMPILE_DATA(iseq)->catch_table_ary)) \
RB_OBJ_WRITE(iseq, &ISEQ_COMPILE_DATA(iseq)->catch_table_ary, rb_ary_tmp_new(3)); \
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_POPPED(anchor, desc, node) \
(debug_compile("== " desc "\n", \
iseq_compile_each(iseq, (anchor), (node), 1)))
/* compile node, which is popped when 'popped' is true */
#define COMPILE_(anchor, desc, node, popped) \
(debug_compile("== " desc "\n", \
iseq_compile_each(iseq, (anchor), (node), (popped))))
#define COMPILE_RECV(anchor, desc, node) \
(private_recv_p(node) ? \
(ADD_INSN(anchor, node, putself), VM_CALL_FCALL) : \
COMPILE(anchor, desc, node->nd_recv) ? 0 : -1)
#define OPERAND_AT(insn, idx) \
(((INSN*)(insn))->operands[(idx)])
#define INSN_OF(insn) \
(((INSN*)(insn))->insn_id)
#define IS_INSN(link) ((link)->type == ISEQ_ELEMENT_INSN)
#define IS_LABEL(link) ((link)->type == ISEQ_ELEMENT_LABEL)
#define IS_ADJUST(link) ((link)->type == ISEQ_ELEMENT_ADJUST)
#define IS_TRACE(link) ((link)->type == ISEQ_ELEMENT_TRACE)
#define IS_INSN_ID(iobj, insn) (INSN_OF(iobj) == BIN(insn))
#define IS_NEXT_INSN_ID(link, insn) \
((link)->next && IS_INSN((link)->next) && IS_INSN_ID((link)->next, insn))
/* error */
#if CPDEBUG > 0
NORETURN(static void append_compile_error(const rb_iseq_t *iseq, int line, const char *fmt, ...));
#endif
static void
append_compile_error(const rb_iseq_t *iseq, int line, const char *fmt, ...)
{
VALUE err_info = ISEQ_COMPILE_DATA(iseq)->err_info;
VALUE file = rb_iseq_path(iseq);
VALUE err = err_info == Qtrue ? Qfalse : err_info;
va_list args;
va_start(args, fmt);
err = rb_syntax_error_append(err, file, line, -1, NULL, fmt, args);
va_end(args);
if (NIL_P(err_info)) {
RB_OBJ_WRITE(iseq, &ISEQ_COMPILE_DATA(iseq)->err_info, err);
rb_set_errinfo(err);
}
else if (!err_info) {
RB_OBJ_WRITE(iseq, &ISEQ_COMPILE_DATA(iseq)->err_info, Qtrue);
}
if (compile_debug) {
if (SPECIAL_CONST_P(err)) err = rb_eSyntaxError;
rb_exc_fatal(err);
}
}
#if 0
static void
compile_bug(rb_iseq_t *iseq, int line, const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
rb_report_bug_valist(rb_iseq_path(iseq), line, fmt, args);
va_end(args);
abort();
}
#endif
#define COMPILE_ERROR append_compile_error
#define ERROR_ARGS_AT(n) iseq, nd_line(n),
#define ERROR_ARGS ERROR_ARGS_AT(node)
#define EXPECT_NODE(prefix, node, ndtype, errval) \
do { \
const NODE *error_node = (node); \
enum node_type error_type = nd_type(error_node); \
if (error_type != (ndtype)) { \
COMPILE_ERROR(ERROR_ARGS_AT(error_node) \
prefix ": " #ndtype " is expected, but %s", \
ruby_node_name(error_type)); \
return errval; \
} \
} while (0)
#define EXPECT_NODE_NONULL(prefix, parent, ndtype, errval) \
do { \
COMPILE_ERROR(ERROR_ARGS_AT(parent) \
prefix ": must be " #ndtype ", but 0"); \
return errval; \
} while (0)
#define UNKNOWN_NODE(prefix, node, errval) \
do { \
const NODE *error_node = (node); \
COMPILE_ERROR(ERROR_ARGS_AT(error_node) prefix ": unknown node (%s)", \
ruby_node_name(nd_type(error_node))); \
return errval; \
} while (0)
#define COMPILE_OK 1
#define COMPILE_NG 0
#define CHECK(sub) if (!(sub)) {BEFORE_RETURN;return COMPILE_NG;}
#define NO_CHECK(sub) (void)(sub)
#define BEFORE_RETURN
/* leave name uninitialized so that compiler warn if INIT_ANCHOR is
* missing */
#define DECL_ANCHOR(name) \
LINK_ANCHOR name[1] = {{{ISEQ_ELEMENT_ANCHOR,},}}
#define INIT_ANCHOR(name) \
(name->last = &name->anchor)
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_with_cursor(const LINK_ELEMENT *link, const LINK_ELEMENT *curr, const LABEL *dest);
static void dump_disasm_list(const 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, const NODE *const line_node, 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 TRACE *new_trace_body(rb_iseq_t *iseq, rb_event_flag_t event, long data);
static int iseq_compile_each(rb_iseq_t *iseq, LINK_ANCHOR *anchor, const NODE *n, int);
static int iseq_setup(rb_iseq_t *iseq, LINK_ANCHOR *const anchor);
static int iseq_setup_insn(rb_iseq_t *iseq, LINK_ANCHOR *const anchor);
static int iseq_optimize(rb_iseq_t *iseq, LINK_ANCHOR *const anchor);
static int iseq_insns_unification(rb_iseq_t *iseq, LINK_ANCHOR *const 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 *const anchor, const NODE *const node);
static int iseq_set_sequence_stackcaching(rb_iseq_t *iseq, LINK_ANCHOR *const anchor);
static int iseq_set_sequence(rb_iseq_t *iseq, LINK_ANCHOR *const anchor);
static int iseq_set_exception_table(rb_iseq_t *iseq);
static int iseq_set_optargs_table(rb_iseq_t *iseq);
static int compile_defined_expr(rb_iseq_t *iseq, LINK_ANCHOR *const ret, const NODE *const node, VALUE needstr);
static int compile_hash(rb_iseq_t *iseq, LINK_ANCHOR *const ret, const NODE *node, int method_call_keywords, int popped);
/*
* To make Array to LinkedList, use link_anchor
*/
static void
verify_list(ISEQ_ARG_DECLARE const char *info, LINK_ANCHOR *const 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
static void
verify_call_cache(rb_iseq_t *iseq)
{
#if CPDEBUG
// fprintf(stderr, "ci_size:%d\t", iseq->body->ci_size); rp(iseq);
VALUE *original = rb_iseq_original_iseq(iseq);
size_t i = 0;
while (i < iseq->body->iseq_size) {
VALUE insn = original[i];
const char *types = insn_op_types(insn);
for (int j=0; types[j]; j++) {
if (types[j] == TS_CALLDATA) {
struct rb_call_data *cd = (struct rb_call_data *)original[i+j+1];
const struct rb_callinfo *ci = cd->ci;
const struct rb_callcache *cc = cd->cc;
if (cc != vm_cc_empty()) {
vm_ci_dump(ci);
rb_bug("call cache is not initialized by vm_cc_empty()");
}
}
}
i += insn_len(insn);
}
for (unsigned int i=0; i<iseq->body->ci_size; i++) {
struct rb_call_data *cd = &iseq->body->call_data[i];
const struct rb_callinfo *ci = cd->ci;
const struct rb_callcache *cc = cd->cc;
if (cc != NULL && cc != vm_cc_empty()) {
vm_ci_dump(ci);
rb_bug("call cache is not initialized by vm_cc_empty()");
}
}
#endif
}
/*
* elem1, elem2 => elem1, elem2, elem
*/
static void
ADD_ELEM(ISEQ_ARG_DECLARE LINK_ANCHOR *const 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 *const 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
branch_coverage_valid_p(rb_iseq_t *iseq, int first_line)
{
if (!ISEQ_COVERAGE(iseq)) return 0;
if (!ISEQ_BRANCH_COVERAGE(iseq)) return 0;
if (first_line <= 0) return 0;
return 1;
}
static VALUE
decl_branch_base(rb_iseq_t *iseq, const NODE *node, const char *type)
{
const int first_lineno = nd_first_lineno(node), first_column = nd_first_column(node);
const int last_lineno = nd_last_lineno(node), last_column = nd_last_column(node);
if (!branch_coverage_valid_p(iseq, first_lineno)) return Qundef;
/*
* if !structure[node]
* structure[node] = [type, first_lineno, first_column, last_lineno, last_column, branches = {}]
* else
* branches = structure[node][5]
* end
*/
VALUE structure = RARRAY_AREF(ISEQ_BRANCH_COVERAGE(iseq), 0);
VALUE key = (VALUE)node | 1; // FIXNUM for hash key
VALUE branch_base = rb_hash_aref(structure, key);
VALUE branches;
if (NIL_P(branch_base)) {
branch_base = rb_ary_tmp_new(6);
rb_hash_aset(structure, key, branch_base);
rb_ary_push(branch_base, ID2SYM(rb_intern(type)));
rb_ary_push(branch_base, INT2FIX(first_lineno));
rb_ary_push(branch_base, INT2FIX(first_column));
rb_ary_push(branch_base, INT2FIX(last_lineno));
rb_ary_push(branch_base, INT2FIX(last_column));
branches = rb_hash_new();
rb_obj_hide(branches);
rb_ary_push(branch_base, branches);
}
else {
branches = RARRAY_AREF(branch_base, 5);
}
return branches;
}
static NODE
generate_dummy_line_node(int lineno, int node_id)
{
NODE dummy = { 0 };
nd_set_line(&dummy, lineno);
nd_set_node_id(&dummy, node_id);
return dummy;
}
static void
add_trace_branch_coverage(rb_iseq_t *iseq, LINK_ANCHOR *const seq, const NODE *node, int branch_id, const char *type, VALUE branches)
{
const int first_lineno = nd_first_lineno(node), first_column = nd_first_column(node);
const int last_lineno = nd_last_lineno(node), last_column = nd_last_column(node);
if (!branch_coverage_valid_p(iseq, first_lineno)) return;
/*
* if !branches[branch_id]
* branches[branch_id] = [type, first_lineno, first_column, last_lineno, last_column, counter_idx]
* else
* counter_idx= branches[branch_id][5]
* end
*/
VALUE key = INT2FIX(branch_id);
VALUE branch = rb_hash_aref(branches, key);
long counter_idx;
if (NIL_P(branch)) {
branch = rb_ary_tmp_new(6);
rb_hash_aset(branches, key, branch);
rb_ary_push(branch, ID2SYM(rb_intern(type)));
rb_ary_push(branch, INT2FIX(first_lineno));
rb_ary_push(branch, INT2FIX(first_column));
rb_ary_push(branch, INT2FIX(last_lineno));
rb_ary_push(branch, INT2FIX(last_column));
VALUE counters = RARRAY_AREF(ISEQ_BRANCH_COVERAGE(iseq), 1);
counter_idx = RARRAY_LEN(counters);
rb_ary_push(branch, LONG2FIX(counter_idx));
rb_ary_push(counters, INT2FIX(0));
}
else {
counter_idx = FIX2LONG(RARRAY_AREF(branch, 5));
}
ADD_TRACE_WITH_DATA(seq, RUBY_EVENT_COVERAGE_BRANCH, counter_idx);
NODE dummy_line_node = generate_dummy_line_node(last_lineno, nd_node_id(node));
ADD_INSN(seq, &dummy_line_node, nop);
}
#define ISEQ_LAST_LINE(iseq) (ISEQ_COMPILE_DATA(iseq)->last_line)
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(iseq, lobj->position,
"%"PRIsVALUE": undefined label",
rb_sym2str((VALUE)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);
}
VALUE
rb_iseq_compile_callback(rb_iseq_t *iseq, const struct rb_iseq_new_with_callback_callback_func * ifunc)
{
DECL_ANCHOR(ret);
INIT_ANCHOR(ret);
(*ifunc->func)(iseq, ret, ifunc->data);
NODE dummy_line_node = generate_dummy_line_node(ISEQ_COMPILE_DATA(iseq)->last_line, -1);
ADD_INSN(ret, &dummy_line_node, leave);
CHECK(iseq_setup_insn(iseq, ret));
return iseq_setup(iseq, ret);
}
VALUE
rb_iseq_compile_node(rb_iseq_t *iseq, const NODE *node)
{
DECL_ANCHOR(ret);
INIT_ANCHOR(ret);
if (IMEMO_TYPE_P(node, imemo_ifunc)) {
rb_raise(rb_eArgError, "unexpected imemo_ifunc");
}
if (node == 0) {
NO_CHECK(COMPILE(ret, "nil", node));
iseq_set_local_table(iseq, 0);
}
/* assume node is T_NODE */
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, RUBY_EVENT_B_CALL);
NODE dummy_line_node = generate_dummy_line_node(FIX2INT(iseq->body->location.first_lineno), -1);
ADD_INSN (ret, &dummy_line_node, nop);
ADD_LABEL(ret, start);
CHECK(COMPILE(ret, "block body", node->nd_body));
ADD_LABEL(ret, end);
ADD_TRACE(ret, RUBY_EVENT_B_RETURN);
ISEQ_COMPILE_DATA(iseq)->last_line = iseq->body->location.code_location.end_pos.lineno;
/* wide range catch handler must put at last */
ADD_CATCH_ENTRY(CATCH_TYPE_REDO, start, end, NULL, start);
ADD_CATCH_ENTRY(CATCH_TYPE_NEXT, start, end, NULL, end);
break;
}
case ISEQ_TYPE_CLASS:
{
ADD_TRACE(ret, RUBY_EVENT_CLASS);
CHECK(COMPILE(ret, "scoped node", node->nd_body));
ADD_TRACE(ret, RUBY_EVENT_END);
ISEQ_COMPILE_DATA(iseq)->last_line = nd_line(node);
break;
}
case ISEQ_TYPE_METHOD:
{
ADD_TRACE(ret, RUBY_EVENT_CALL);
CHECK(COMPILE(ret, "scoped node", node->nd_body));
ADD_TRACE(ret, RUBY_EVENT_RETURN);
ISEQ_COMPILE_DATA(iseq)->last_line = nd_line(node);
break;
}
default: {
CHECK(COMPILE(ret, "scoped node", node->nd_body));
break;
}
}
}
else {
const char *m;
#define INVALID_ISEQ_TYPE(type) \
ISEQ_TYPE_##type: m = #type; goto invalid_iseq_type
switch (iseq->body->type) {
case INVALID_ISEQ_TYPE(METHOD);
case INVALID_ISEQ_TYPE(CLASS);
case INVALID_ISEQ_TYPE(BLOCK);
case INVALID_ISEQ_TYPE(EVAL);
case INVALID_ISEQ_TYPE(MAIN);
case INVALID_ISEQ_TYPE(TOP);
#undef INVALID_ISEQ_TYPE /* invalid iseq types end */
case ISEQ_TYPE_RESCUE:
iseq_set_exception_local_table(iseq);
CHECK(COMPILE(ret, "rescue", node));
break;
case ISEQ_TYPE_ENSURE:
iseq_set_exception_local_table(iseq);
CHECK(COMPILE_POPPED(ret, "ensure", node));
break;
case ISEQ_TYPE_PLAIN:
CHECK(COMPILE(ret, "ensure", node));
break;
default:
COMPILE_ERROR(ERROR_ARGS "unknown scope: %d", iseq->body->type);
return COMPILE_NG;
invalid_iseq_type:
COMPILE_ERROR(ERROR_ARGS "compile/ISEQ_TYPE_%s should not be reached", m);
return COMPILE_NG;
}
}
if (iseq->body->type == ISEQ_TYPE_RESCUE || iseq->body->type == ISEQ_TYPE_ENSURE) {
NODE dummy_line_node = generate_dummy_line_node(0, -1);
ADD_GETLOCAL(ret, &dummy_line_node, LVAR_ERRINFO, 0);
ADD_INSN1(ret, &dummy_line_node, throw, INT2FIX(0) /* continue throw */ );
}
else {
NODE dummy_line_node = generate_dummy_line_node(ISEQ_COMPILE_DATA(iseq)->last_line, -1);
ADD_INSN(ret, &dummy_line_node, leave);
}
#if OPT_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
CHECK(iseq_setup_insn(iseq, ret));
return iseq_setup(iseq, ret);
}
static 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;
}
FL_SET((VALUE)iseq, ISEQ_TRANSLATED);
#endif
return COMPILE_OK;
}
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
/*
* Some OpenBSD platforms (including sparc64) require strict alignment.
*/
#if defined(__OpenBSD__)
#include <sys/endian.h>
#ifdef __STRICT_ALIGNMENT
#define STRICT_ALIGNMENT
#endif
#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_with_arena(struct iseq_compile_data_storage **arena, size_t size)
{
void *ptr = 0;
struct iseq_compile_data_storage *storage = *arena;
#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 +
offsetof(struct iseq_compile_data_storage, buff));
storage = *arena = 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];