/
zend_vm_gen.php
1302 lines (1208 loc) · 42.2 KB
/
zend_vm_gen.php
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<?php
/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2009 Zend Technologies Ltd. (http://www.zend.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 2.00 of the Zend license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.zend.com/license/2_00.txt. |
| If you did not receive a copy of the Zend license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@zend.com so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Dmitry Stogov <dmitry@zend.com> |
+----------------------------------------------------------------------+
$Id$
*/
$header_text = <<< DATA
/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2009 Zend Technologies Ltd. (http://www.zend.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 2.00 of the Zend license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.zend.com/license/2_00.txt. |
| If you did not receive a copy of the Zend license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@zend.com so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@zend.com> |
| Zeev Suraski <zeev@zend.com> |
| Dmitry Stogov <dmitry@zend.com> |
+----------------------------------------------------------------------+
*/
DATA;
/*
This script creates zend_vm_execute.h and zend_vm_opcodes.h
from existing zend_vm_def.h and zend_vm_execute.skl
*/
error_reporting(E_ALL);
define("ZEND_VM_KIND_CALL", 1);
define("ZEND_VM_KIND_SWITCH", 2);
define("ZEND_VM_KIND_GOTO", 3);
$op_types = array(
"ANY",
"CONST",
"TMP",
"VAR",
"UNUSED",
"CV"
);
$prefix = array(
"ANY" => "",
"TMP" => "_TMP",
"VAR" => "_VAR",
"CONST" => "_CONST",
"UNUSED" => "_UNUSED",
"CV" => "_CV",
);
$typecode = array(
"ANY" => 0,
"TMP" => 1,
"VAR" => 2,
"CONST" => 0,
"UNUSED" => 3,
"CV" => 4,
);
$op1_type = array(
"ANY" => "opline->op1.op_type",
"TMP" => "IS_TMP_VAR",
"VAR" => "IS_VAR",
"CONST" => "IS_CONST",
"UNUSED" => "IS_UNUSED",
"CV" => "IS_CV",
);
$op2_type = array(
"ANY" => "opline->op2.op_type",
"TMP" => "IS_TMP_VAR",
"VAR" => "IS_VAR",
"CONST" => "IS_CONST",
"UNUSED" => "IS_UNUSED",
"CV" => "IS_CV",
);
$op1_free = array(
"ANY" => "(free_op1.var != NULL)",
"TMP" => "1",
"VAR" => "(free_op1.var != NULL)",
"CONST" => "0",
"UNUSED" => "0",
"CV" => "0",
);
$op2_free = array(
"ANY" => "(free_op2.var != NULL)",
"TMP" => "1",
"VAR" => "(free_op2.var != NULL)",
"CONST" => "0",
"UNUSED" => "0",
"CV" => "0",
);
$op1_get_zval_ptr = array(
"ANY" => "get_zval_ptr(&opline->op1, EX(Ts), &free_op1, \\1)",
"TMP" => "_get_zval_ptr_tmp(&opline->op1, EX(Ts), &free_op1 TSRMLS_CC)",
"VAR" => "_get_zval_ptr_var(&opline->op1, EX(Ts), &free_op1 TSRMLS_CC)",
"CONST" => "&opline->op1.u.constant",
"UNUSED" => "NULL",
"CV" => "_get_zval_ptr_cv(&opline->op1, EX(Ts), \\1 TSRMLS_CC)",
);
$op2_get_zval_ptr = array(
"ANY" => "get_zval_ptr(&opline->op2, EX(Ts), &free_op2, \\1)",
"TMP" => "_get_zval_ptr_tmp(&opline->op2, EX(Ts), &free_op2 TSRMLS_CC)",
"VAR" => "_get_zval_ptr_var(&opline->op2, EX(Ts), &free_op2 TSRMLS_CC)",
"CONST" => "&opline->op2.u.constant",
"UNUSED" => "NULL",
"CV" => "_get_zval_ptr_cv(&opline->op2, EX(Ts), \\1 TSRMLS_CC)",
);
$op1_get_zval_ptr_ptr = array(
"ANY" => "get_zval_ptr_ptr(&opline->op1, EX(Ts), &free_op1, \\1)",
"TMP" => "NULL",
"VAR" => "_get_zval_ptr_ptr_var(&opline->op1, EX(Ts), &free_op1 TSRMLS_CC)",
"CONST" => "NULL",
"UNUSED" => "NULL",
"CV" => "_get_zval_ptr_ptr_cv(&opline->op1, EX(Ts), \\1 TSRMLS_CC)",
);
$op2_get_zval_ptr_ptr = array(
"ANY" => "get_zval_ptr_ptr(&opline->op2, EX(Ts), &free_op2, \\1)",
"TMP" => "NULL",
"VAR" => "_get_zval_ptr_ptr_var(&opline->op2, EX(Ts), &free_op2 TSRMLS_CC)",
"CONST" => "NULL",
"UNUSED" => "NULL",
"CV" => "_get_zval_ptr_ptr_cv(&opline->op2, EX(Ts), \\1 TSRMLS_CC)",
);
$op1_get_obj_zval_ptr = array(
"ANY" => "get_obj_zval_ptr(&opline->op1, EX(Ts), &free_op1, \\1)",
"TMP" => "_get_zval_ptr_tmp(&opline->op1, EX(Ts), &free_op1 TSRMLS_CC)",
"VAR" => "_get_zval_ptr_var(&opline->op1, EX(Ts), &free_op1 TSRMLS_CC)",
"CONST" => "&opline->op1.u.constant",
"UNUSED" => "_get_obj_zval_ptr_unused(TSRMLS_C)",
"CV" => "_get_zval_ptr_cv(&opline->op1, EX(Ts), \\1 TSRMLS_CC)",
);
$op2_get_obj_zval_ptr = array(
"ANY" => "get_obj_zval_ptr(&opline->op2, EX(Ts), &free_op2, \\1)",
"TMP" => "_get_zval_ptr_tmp(&opline->op2, EX(Ts), &free_op2 TSRMLS_CC)",
"VAR" => "_get_zval_ptr_var(&opline->op2, EX(Ts), &free_op2 TSRMLS_CC)",
"CONST" => "&opline->op2.u.constant",
"UNUSED" => "_get_obj_zval_ptr_unused(TSRMLS_C)",
"CV" => "_get_zval_ptr_cv(&opline->op2, EX(Ts), \\1 TSRMLS_CC)",
);
$op1_get_obj_zval_ptr_ptr = array(
"ANY" => "get_obj_zval_ptr_ptr(&opline->op1, EX(Ts), &free_op1, \\1)",
"TMP" => "NULL",
"VAR" => "_get_zval_ptr_ptr_var(&opline->op1, EX(Ts), &free_op1 TSRMLS_CC)",
"CONST" => "NULL",
"UNUSED" => "_get_obj_zval_ptr_ptr_unused(TSRMLS_C)",
"CV" => "_get_zval_ptr_ptr_cv(&opline->op1, EX(Ts), \\1 TSRMLS_CC)",
);
$op2_get_obj_zval_ptr_ptr = array(
"ANY" => "get_obj_zval_ptr_ptr(&opline->op2, EX(Ts), &free_op2, \\1)",
"TMP" => "NULL",
"VAR" => "_get_zval_ptr_ptr_var(&opline->op2, EX(Ts), &free_op2 TSRMLS_CC)",
"CONST" => "NULL",
"UNUSED" => "_get_obj_zval_ptr_ptr_unused(TSRMLS_C)",
"CV" => "_get_zval_ptr_ptr_cv(&opline->op2, EX(Ts), \\1 TSRMLS_CC)",
);
$op1_is_tmp_free = array(
"ANY" => "IS_TMP_FREE(free_op1)",
"TMP" => "1",
"VAR" => "0",
"CONST" => "0",
"UNUSED" => "0",
"CV" => "0",
);
$op2_is_tmp_free = array(
"ANY" => "IS_TMP_FREE(free_op2)",
"TMP" => "1",
"VAR" => "0",
"CONST" => "0",
"UNUSED" => "0",
"CV" => "0",
);
$op1_free_op = array(
"ANY" => "FREE_OP(free_op1)",
"TMP" => "zval_dtor(free_op1.var)",
"VAR" => "if (free_op1.var) {zval_ptr_dtor(&free_op1.var);}",
"CONST" => "",
"UNUSED" => "",
"CV" => "",
);
$op2_free_op = array(
"ANY" => "FREE_OP(free_op2)",
"TMP" => "zval_dtor(free_op2.var)",
"VAR" => "if (free_op2.var) {zval_ptr_dtor(&free_op2.var);}",
"CONST" => "",
"UNUSED" => "",
"CV" => "",
);
$op1_free_op_if_var = array(
"ANY" => "FREE_OP_IF_VAR(free_op1)",
"TMP" => "",
"VAR" => "if (free_op1.var) {zval_ptr_dtor(&free_op1.var);}",
"CONST" => "",
"UNUSED" => "",
"CV" => "",
);
$op2_free_op_if_var = array(
"ANY" => "FREE_OP_IF_VAR(free_op2)",
"TMP" => "",
"VAR" => "if (free_op2.var) {zval_ptr_dtor(&free_op2.var);}",
"CONST" => "",
"UNUSED" => "",
"CV" => "",
);
$op1_free_op_var_ptr = array(
"ANY" => "if (free_op1.var) {zval_ptr_dtor(&free_op1.var);}",
"TMP" => "",
"VAR" => "if (free_op1.var) {zval_ptr_dtor(&free_op1.var);}",
"CONST" => "",
"UNUSED" => "",
"CV" => "",
);
$op2_free_op_var_ptr = array(
"ANY" => "if (free_op2.var) {zval_ptr_dtor(&free_op2.var);}",
"TMP" => "",
"VAR" => "if (free_op2.var) {zval_ptr_dtor(&free_op2.var);}",
"CONST" => "",
"UNUSED" => "",
"CV" => "",
);
$list = array(); // list of opcode handlers and helpers in original order
$opcodes = array(); // opcode handlers by code
$helpers = array(); // opcode helpers by name
$params = array(); // parameters of helpers
$opnames = array(); // opcode name to code mapping
$line_no = 1;
// Writes $s into resulting executor
function out($f, $s) {
global $line_no;
fputs($f,$s);
$line_no += substr_count($s, "\n");
}
// Resets #line directives in resulting executor
function out_line($f) {
global $line_no, $executor_file;
fputs($f,"#line ".($line_no+1)." \"".$executor_file."\"\n");
++$line_no;
}
// Returns name of specialized helper
function helper_name($name, $spec, $op1, $op2) {
global $prefix, $helpers;
if (isset($helpers[$name])) {
// If we haven't helper with specified spicialized operands then
// using unspecialized helper
if (!isset($helpers[$name]["op1"][$op1]) &&
isset($helpers[$name]["op1"]["ANY"])) {
$op1 = "ANY";
}
if (!isset($helpers[$name]["op2"][$op2]) &&
isset($helpers[$name]["op2"]["ANY"])) {
$op2 = "ANY";
}
}
return $name.($spec?"_SPEC":"").$prefix[$op1].$prefix[$op2];
}
// Generates code for opcode handler or helper
function gen_code($f, $spec, $kind, $code, $op1, $op2) {
global $op1_type, $op2_type, $op1_get_zval_ptr, $op2_get_zval_ptr,
$op1_get_zval_ptr_ptr, $op2_get_zval_ptr_ptr,
$op1_get_obj_zval_ptr, $op2_get_obj_zval_ptr,
$op1_get_obj_zval_ptr_ptr, $op2_get_obj_zval_ptr_ptr,
$op1_is_tmp_free, $op2_is_tmp_free, $op1_free, $op2_free,
$op1_free_op, $op2_free_op, $op1_free_op_if_var, $op2_free_op_if_var,
$op1_free_op_var_ptr, $op2_free_op_var_ptr, $prefix;
// Specializing
$code = preg_replace(
array(
"/OP1_TYPE/",
"/OP2_TYPE/",
"/OP1_FREE/",
"/OP2_FREE/",
"/GET_OP1_ZVAL_PTR\(([^)]*)\)/",
"/GET_OP2_ZVAL_PTR\(([^)]*)\)/",
"/GET_OP1_ZVAL_PTR_PTR\(([^)]*)\)/",
"/GET_OP2_ZVAL_PTR_PTR\(([^)]*)\)/",
"/GET_OP1_OBJ_ZVAL_PTR\(([^)]*)\)/",
"/GET_OP2_OBJ_ZVAL_PTR\(([^)]*)\)/",
"/GET_OP1_OBJ_ZVAL_PTR_PTR\(([^)]*)\)/",
"/GET_OP2_OBJ_ZVAL_PTR_PTR\(([^)]*)\)/",
"/IS_OP1_TMP_FREE\(\)/",
"/IS_OP2_TMP_FREE\(\)/",
"/FREE_OP1\(\)/",
"/FREE_OP2\(\)/",
"/FREE_OP1_IF_VAR\(\)/",
"/FREE_OP2_IF_VAR\(\)/",
"/FREE_OP1_VAR_PTR\(\)/",
"/FREE_OP2_VAR_PTR\(\)/",
"/^#ifdef\s+ZEND_VM_SPEC\s*\n/m",
"/^#ifndef\s+ZEND_VM_SPEC\s*\n/m",
"/\!defined\(ZEND_VM_SPEC\)/m",
"/defined\(ZEND_VM_SPEC\)/m",
"/ZEND_VM_C_LABEL\(\s*([A-Za-z_]*)\s*\)/m",
"/ZEND_VM_C_GOTO\(\s*([A-Za-z_]*)\s*\)/m",
"/^#if\s+1\s*\\|\\|.*[^\\\\]$/m",
"/^#if\s+0\s*&&.*[^\\\\]$/m"
),
array(
$op1_type[$op1],
$op2_type[$op2],
$op1_free[$op1],
$op2_free[$op2],
$op1_get_zval_ptr[$op1],
$op2_get_zval_ptr[$op2],
$op1_get_zval_ptr_ptr[$op1],
$op2_get_zval_ptr_ptr[$op2],
$op1_get_obj_zval_ptr[$op1],
$op2_get_obj_zval_ptr[$op2],
$op1_get_obj_zval_ptr_ptr[$op1],
$op2_get_obj_zval_ptr_ptr[$op2],
$op1_is_tmp_free[$op1],
$op2_is_tmp_free[$op2],
$op1_free_op[$op1],
$op2_free_op[$op2],
$op1_free_op_if_var[$op1],
$op2_free_op_if_var[$op2],
$op1_free_op_var_ptr[$op1],
$op2_free_op_var_ptr[$op2],
($op1!="ANY"||$op2!="ANY")?"#if 1\n":"#if 0\n",
($op1!="ANY"||$op2!="ANY")?"#if 0\n":"#if 1\n",
($op1!="ANY"||$op2!="ANY")?"0":"1",
($op1!="ANY"||$op2!="ANY")?"1":"0",
"\\1".(($spec && $kind != ZEND_VM_KIND_CALL)?("_SPEC".$prefix[$op1].$prefix[$op2]):""),
"goto \\1".(($spec && $kind != ZEND_VM_KIND_CALL)?("_SPEC".$prefix[$op1].$prefix[$op2]):""),
"#if 1",
"#if 0",
),
$code);
// Updating code according to selected threading model
switch($kind) {
case ZEND_VM_KIND_CALL:
$code = preg_replace(
array(
"/EXECUTE_DATA/m",
"/ZEND_VM_DISPATCH_TO_HANDLER\(\s*([A-Z_]*)\s*\)/m",
"/ZEND_VM_DISPATCH_TO_HELPER\(\s*([A-Za-z_]*)\s*\)/me",
"/ZEND_VM_DISPATCH_TO_HELPER_EX\(\s*([A-Za-z_]*)\s*,\s*[A-Za-z_]*\s*,\s*(.*)\s*\);/me",
),
array(
"execute_data",
"return \\1".($spec?"_SPEC":"").$prefix[$op1].$prefix[$op2]."_HANDLER(ZEND_OPCODE_HANDLER_ARGS_PASSTHRU)",
"'return '.helper_name('\\1',$spec,'$op1','$op2').'(ZEND_OPCODE_HANDLER_ARGS_PASSTHRU)'",
"'return '.helper_name('\\1',$spec,'$op1','$op2').'(\\2, ZEND_OPCODE_HANDLER_ARGS_PASSTHRU);'",
),
$code);
break;
case ZEND_VM_KIND_SWITCH:
$code = preg_replace(
array(
"/EXECUTE_DATA/m",
"/ZEND_VM_DISPATCH_TO_HANDLER\(\s*([A-Z_]*)\s*\)/m",
"/ZEND_VM_DISPATCH_TO_HELPER\(\s*([A-Za-z_]*)\s*\)/me",
"/ZEND_VM_DISPATCH_TO_HELPER_EX\(\s*([A-Za-z_]*)\s*,\s*([A-Za-z_]*)\s*,\s*(.*)\s*\);/me",
),
array(
"&execute_data",
"goto \\1".($spec?"_SPEC":"").$prefix[$op1].$prefix[$op2]."_LABEL",
"'goto '.helper_name('\\1',$spec,'$op1','$op2')",
"'\\2 = \\3; goto '.helper_name('\\1',$spec,'$op1','$op2').';'",
),
$code);
break;
case ZEND_VM_KIND_GOTO:
$code = preg_replace(
array(
"/EXECUTE_DATA/m",
"/ZEND_VM_DISPATCH_TO_HANDLER\(\s*([A-Z_]*)\s*\)/m",
"/ZEND_VM_DISPATCH_TO_HELPER\(\s*([A-Za-z_]*)\s*\)/me",
"/ZEND_VM_DISPATCH_TO_HELPER_EX\(\s*([A-Za-z_]*)\s*,\s*([A-Za-z_]*)\s*,\s*(.*)\s*\);/me",
),
array(
"&execute_data",
"goto \\1".($spec?"_SPEC":"").$prefix[$op1].$prefix[$op2]."_HANDLER",
"'goto '.helper_name('\\1',$spec,'$op1','$op2')",
"'\\2 = \\3; goto '.helper_name('\\1',$spec,'$op1','$op2').';'",
),
$code);
break;
}
/* Remove unused free_op1 and free_op2 declarations */
if ($spec && preg_match_all('/^\s*zend_free_op\s+[^;]+;\s*$/me', $code, $matches, PREG_SET_ORDER)) {
$n = 0;
foreach ($matches as $match) {
$code = preg_replace('/'.preg_quote($match[0],'/').'/', "\$D$n", $code);
++$n;
}
$del_free_op1 = (strpos($code, "free_op1") === false);
$del_free_op2 = (strpos($code, "free_op2") === false);
$n = 0;
foreach ($matches as $match) {
$dcl = $match[0];
$changed = 0;
if ($del_free_op1 && strpos($dcl, "free_op1") !== false) {
$dcl = preg_replace("/free_op1\s*,\s*/", "", $dcl);
$dcl = preg_replace("/free_op1\s*;/", ";", $dcl);
$changed = 1;
}
if ($del_free_op2 && strpos($dcl, "free_op2") !== false) {
$dcl = preg_replace("/free_op2\s*,\s*/", "", $dcl);
$dcl = preg_replace("/free_op2\s*;/", ";", $dcl);
$changed = 1;
}
if ($changed) {
$dcl = preg_replace("/,\s*;/", ";", $dcl);
$dcl = preg_replace("/zend_free_op\s*;/", "", $dcl);
}
$code = preg_replace("/\\\$D$n/", $dcl, $code);
++$n;
}
}
/* Remove unnecessary ';' */
$code = preg_replace('/^\s*;\s*$/m', '', $code);
/* Remove WS */
$code = preg_replace('/[ \t]+\n/m', "\n", $code);
out($f, $code);
}
// Generates opcode handler
function gen_handler($f, $spec, $kind, $name, $op1, $op2, $use, $code, $lineno) {
global $definition_file, $prefix, $typecode, $opnames;
if (ZEND_VM_LINES) {
out($f, "#line $lineno \"$definition_file\"\n");
}
// Generate opcode handler's entry point according to selected threading model
switch($kind) {
case ZEND_VM_KIND_CALL:
out($f,"static int ".$name.($spec?"_SPEC":"").$prefix[$op1].$prefix[$op2]."_HANDLER(ZEND_OPCODE_HANDLER_ARGS)\n");
break;
case ZEND_VM_KIND_SWITCH:
if ($spec) {
out($f,"case ".((string)($opnames[$name]*25+($typecode[$op1]*5)+$typecode[$op2])).": /*".$name."_SPEC".$prefix[$op1].$prefix[$op2]."_HANDLER*/");
} else {
out($f,"case ".$name.":");
}
if ($use) {
// This handler is used by other handlers. We will add label to call it.
out($f," ".$name.($spec?"_SPEC":"").$prefix[$op1].$prefix[$op2]."_LABEL:\n");
} else {
out($f,"\n");
}
break;
case ZEND_VM_KIND_GOTO:
out($f,$name.($spec?"_SPEC":"").$prefix[$op1].$prefix[$op2]."_HANDLER:\n");
break;
}
// Generate opcode handler's code
gen_code($f, $spec, $kind, $code, $op1, $op2);
}
// Generates helper
function gen_helper($f, $spec, $kind, $name, $op1, $op2, $param, $code, $lineno) {
global $definition_file, $prefix;
if (ZEND_VM_LINES) {
out($f, "#line $lineno \"$definition_file\"\n");
}
// Generate helper's entry point according to selected threading model
switch($kind) {
case ZEND_VM_KIND_CALL:
if ($param == null) {
// Helper without parameters
out($f, "static int ".$name.($spec?"_SPEC":"").$prefix[$op1].$prefix[$op2]."(ZEND_OPCODE_HANDLER_ARGS)\n");
} else {
// Helper with parameter
out($f, "static int ".$name.($spec?"_SPEC":"").$prefix[$op1].$prefix[$op2]."(".$param.", ZEND_OPCODE_HANDLER_ARGS)\n");
}
break;
case ZEND_VM_KIND_SWITCH:
out($f, $name.($spec?"_SPEC":"").$prefix[$op1].$prefix[$op2].":\n");
break;
case ZEND_VM_KIND_GOTO:
out($f, $name.($spec?"_SPEC":"").$prefix[$op1].$prefix[$op2].":\n");
break;
}
// Generate helper's code
gen_code($f, $spec, $kind, $code, $op1, $op2);
}
// Generates array of opcode handlers (specialized or unspecialized)
function gen_labels($f, $spec, $kind, $prolog) {
global $opcodes, $op_types, $prefix, $typecode;
$next = 0;
if ($spec) {
// Emit labels for specialized executor
// For each opcode in opcode number order
foreach($opcodes as $num => $dsc) {
while ($next != $num) {
// If some opcode numbers are not used then fill hole with pointers
// to handler of undefined opcode
$op1t = $op_types;
// For each op1.op_type except ANY
foreach($op1t as $op1) {
if ($op1 != "ANY") {
$op2t = $op_types;
// For each op2.op_type except ANY
foreach($op2t as $op2) {
if ($op2 != "ANY") {
// Emit pointer to handler of undefined opcode
switch ($kind) {
case ZEND_VM_KIND_CALL:
out($f,$prolog."ZEND_NULL_HANDLER,\n");
break;
case ZEND_VM_KIND_SWITCH:
out($f,$prolog."(opcode_handler_t)-1,\n");
break;
case ZEND_VM_KIND_GOTO:
out($f,$prolog."(opcode_handler_t)&&ZEND_NULL_HANDLER,\n");
break;
}
}
}
}
}
$next++;
}
$next = $num + 1;
$op1t = $op_types;
// For each op1.op_type except ANY
foreach($op1t as $op1) {
if ($op1 != "ANY") {
if (!isset($dsc["op1"][$op1])) {
// Try to use unspecialized handler
$op1 = "ANY";
}
$op2t = $op_types;
// For each op2.op_type except ANY
foreach($op2t as $op2) {
if ($op2 != "ANY") {
if (!isset($dsc["op2"][$op2])) {
// Try to use unspecialized handler
$op2 = "ANY";
}
// Check if specialized handler is defined
if (isset($dsc["op1"][$op1]) &&
isset($dsc["op2"][$op2])) {
// Emit pointer to specialized handler
switch ($kind) {
case ZEND_VM_KIND_CALL:
out($f,$prolog.$dsc["op"]."_SPEC".$prefix[$op1].$prefix[$op2]."_HANDLER,\n");
break;
case ZEND_VM_KIND_SWITCH:
out($f,$prolog."(opcode_handler_t)".((string)($num*25+$typecode[$op1]*5+$typecode[$op2])).",\n");
break;
case ZEND_VM_KIND_GOTO:
out($f,$prolog."(opcode_handler_t)&&".$dsc["op"]."_SPEC".$prefix[$op1].$prefix[$op2]."_HANDLER,\n");
break;
}
} else {
// Emit pinter to handler of undefined opcode
switch ($kind) {
case ZEND_VM_KIND_CALL:
out($f,$prolog."ZEND_NULL_HANDLER,\n");
break;
case ZEND_VM_KIND_SWITCH:
out($f,$prolog."(opcode_handler_t)-1,\n");
break;
case ZEND_VM_KIND_GOTO:
out($f,$prolog."(opcode_handler_t)&&ZEND_NULL_HANDLER,\n");
break;
}
}
}
}
}
}
}
} else {
// Emit labels for unspecialized executor
// For each opcode in opcode number order
foreach($opcodes as $num => $dsc) {
while ($next != $num) {
// If some opcode numbers are not used then fill hole with pointers
// to handler of undefined opcode
switch ($kind) {
case ZEND_VM_KIND_CALL:
out($f,$prolog."ZEND_NULL_HANDLER,\n");
break;
case ZEND_VM_KIND_SWITCH:
out($f,$prolog."(opcode_handler_t)-1,\n");
break;
case ZEND_VM_KIND_GOTO:
out($f,$prolog."(opcode_handler_t)&&ZEND_NULL_HANDLER,\n");
break;
}
$next++;
}
$next = $num+1;
// Emit pointer to unspecialized handler
switch ($kind) {
case ZEND_VM_KIND_CALL:
out($f,$prolog.$dsc["op"]."_HANDLER,\n");
break;
case ZEND_VM_KIND_SWITCH:
out($f,$prolog."(opcode_handler_t)".((string)$num).",\n");
break;
case ZEND_VM_KIND_GOTO:
out($f,$prolog."(opcode_handler_t)&&".$dsc["op"]."_HANDLER,\n");
break;
}
}
}
// Emit last handler's label (undefined opcode)
switch ($kind) {
case ZEND_VM_KIND_CALL:
out($f,$prolog."ZEND_NULL_HANDLER\n");
break;
case ZEND_VM_KIND_SWITCH:
out($f,$prolog."(opcode_handler_t)-1\n");
break;
case ZEND_VM_KIND_GOTO:
out($f,$prolog."(opcode_handler_t)&&ZEND_NULL_HANDLER\n");
break;
}
}
// Generates handler for undefined opcodes (CALL threading model)
function gen_null_handler($f) {
static $done = 0;
// New and all executors with CALL threading model can use the same handler
// for undefined opcodes, do we emit code for it only once
if (!$done) {
$done = 1;
out($f,"static int ZEND_NULL_HANDLER(ZEND_OPCODE_HANDLER_ARGS)\n");
out($f,"{\n");
out($f,"\tzend_error_noreturn(E_ERROR, \"Invalid opcode %d/%d/%d.\", EX(opline)->opcode, EX(opline)->op1.op_type, EX(opline)->op2.op_type);\n");
out($f,"\tZEND_VM_RETURN_FROM_EXECUTE_LOOP();\n");
out($f,"}\n\n");
}
}
// Generates all opcode handlers and helpers (specialized or unspecilaized)
function gen_executor_code($f, $spec, $kind, $prolog) {
global $list, $opcodes, $helpers, $op_types;
if ($spec) {
// Produce specialized executor
$op1t = $op_types;
// for each op1.op_type
foreach($op1t as $op1) {
$op2t = $op_types;
// for each op2.op_type
foreach($op2t as $op2) {
// for each handlers in helpers in original order
foreach ($list as $lineno => $dsc) {
if (isset($dsc["handler"])) {
$num = $dsc["handler"];
// Check if handler accepts such types of operands (op1 and op2)
if (isset($opcodes[$num]["op1"][$op1]) &&
isset($opcodes[$num]["op2"][$op2])) {
// Generate handler code
gen_handler($f, 1, $kind, $opcodes[$num]["op"], $op1, $op2, isset($opcodes[$num]["use"]), $opcodes[$num]["code"], $lineno);
}
} else if (isset($dsc["helper"])) {
$num = $dsc["helper"];
// Check if handler accepts such types of operands (op1 and op2)
if (isset($helpers[$num]["op1"][$op1]) &&
isset($helpers[$num]["op2"][$op2])) {
// Generate helper code
gen_helper($f, 1, $kind, $num, $op1, $op2, $helpers[$num]["param"], $helpers[$num]["code"], $lineno);
}
} else {
var_dump($dsc);
die("??? $kind:$num\n");
}
}
}
}
} else {
// Produce unspecialized executor
// for each handlers in helpers in original order
foreach ($list as $lineno => $dsc) {
if (isset($dsc["handler"])) {
$num = $dsc["handler"];
// Generate handler code
gen_handler($f, 0, $kind, $opcodes[$num]["op"], "ANY", "ANY", isset($opcodes[$num]["use"]), $opcodes[$num]["code"], $lineno);
} else if (isset($dsc["helper"])) {
$num = $dsc["helper"];
// Generate helper code
gen_helper($f, 0, $kind, $num, "ANY", "ANY", $helpers[$num]["param"], $helpers[$num]["code"], $lineno);
} else {
var_dump($dsc);
die("??? $kind:$num\n");
}
}
}
if (ZEND_VM_LINES) {
// Reset #line directives
out_line($f);
}
// Generate handler for undefined opcodes
switch ($kind) {
case ZEND_VM_KIND_CALL:
gen_null_handler($f);
break;
case ZEND_VM_KIND_SWITCH:
out($f,"default:\n");
out($f,"\tzend_error_noreturn(E_ERROR, \"Invalid opcode %d/%d/%d.\", EX(opline)->opcode, EX(opline)->op1.op_type, EX(opline)->op2.op_type);\n");
out($f,"\tZEND_VM_RETURN_FROM_EXECUTE_LOOP();\n");
break;
case ZEND_VM_KIND_GOTO:
out($f,"ZEND_NULL_HANDLER:\n");
out($f,"\tzend_error_noreturn(E_ERROR, \"Invalid opcode %d/%d/%d.\", EX(opline)->opcode, EX(opline)->op1.op_type, EX(opline)->op2.op_type);\n");
out($f,"\tZEND_VM_RETURN_FROM_EXECUTE_LOOP();\n");
break;
}
}
function skip_blanks($f, $prolog, $epilog) {
if (trim($prolog) != "" || trim($epilog) != "") {
out($f, $prolog.$epilog);
}
}
// Generates executor from skeleton file and definition (specialized or unspecialized)
function gen_executor($f, $skl, $spec, $kind, $executor_name, $initializer_name, $old) {
global $params, $skeleton_file, $line_no;
$lineno = 0;
foreach ($skl as $line) {
// Skeleton file contains special markers in form %NAME% those are
// substituted by custom code
if (preg_match("/(.*)[{][%]([A-Z_]*)[%][}](.*)/", $line, $m)) {
switch ($m[2]) {
case "DEFINES":
if (ZEND_VM_OLD_EXECUTOR) {
out($f,"static int zend_vm_old_executor = 0;\n\n");
}
out($f,"static opcode_handler_t zend_vm_get_opcode_handler(zend_uchar opcode, zend_op* op);\n\n");
switch ($kind) {
case ZEND_VM_KIND_CALL:
out($f,"\n");
out($f,"#define ZEND_VM_CONTINUE() return 0\n");
out($f,"#define ZEND_VM_RETURN() return 1\n");
out($f,"#define ZEND_VM_DISPATCH(opcode, opline) return zend_vm_get_opcode_handler(opcode, opline)(ZEND_OPCODE_HANDLER_ARGS_PASSTHRU);\n\n");
out($f,"#define ZEND_OPCODE_HANDLER_ARGS_PASSTHRU_INTERNAL execute_data TSRMLS_CC\n");
break;
case ZEND_VM_KIND_SWITCH:
out($f,"\n");
out($f,"#define ZEND_VM_CONTINUE() goto zend_vm_continue\n");
out($f,"#define ZEND_VM_RETURN() return\n");
out($f,"#define ZEND_VM_DISPATCH(opcode, opline) dispatch_handler = zend_vm_get_opcode_handler(opcode, opline); goto zend_vm_dispatch;\n\n");
out($f,"#define ZEND_OPCODE_HANDLER_ARGS_PASSTHRU_INTERNAL &execute_data TSRMLS_CC\n");
break;
case ZEND_VM_KIND_GOTO:
out($f,"\n");
out($f,"#define ZEND_VM_CONTINUE() goto *(void**)(EX(opline)->handler)\n");
out($f,"#define ZEND_VM_RETURN() return\n");
out($f,"#define ZEND_VM_DISPATCH(opcode, opline) goto *(void**)(zend_vm_get_opcode_handler(opcode, opline));\n\n");
out($f,"#define ZEND_OPCODE_HANDLER_ARGS_PASSTHRU_INTERNAL &execute_data TSRMLS_CC\n");
break;
}
break;
case "EXECUTOR_NAME":
out($f, $m[1].$executor_name.$m[3]."\n");
break;
case "HELPER_VARS":
if ($kind != ZEND_VM_KIND_CALL) {
if ($kind == ZEND_VM_KIND_SWITCH) {
out($f,$m[1]."opcode_handler_t dispatch_handler;\n");
}
// Emit local variables those are used for helpers' parameters
foreach ($params as $param => $x) {
out($f,$m[1].$param.";\n");
}
} else {
skip_blanks($f, $m[1], $m[3]."\n");
}
break;
case "INTERNAL_LABELS":
if ($kind == ZEND_VM_KIND_GOTO) {
// Emit array of labels of opcode handlers and code for
// zend_opcode_handlers initialization
$prolog = $m[1];
out($f,$prolog."if (op_array == NULL) {\n");
out($f,$prolog."\tstatic const opcode_handler_t labels[] = {\n");
gen_labels($f, $spec, $kind, $prolog."\t\t");
out($f,$prolog."\t};\n");
out($f,$prolog."\tzend_opcode_handlers = (opcode_handler_t*)labels;\n");
out($f,$prolog."\treturn;\n");
out($f,$prolog."}\n");
} else {
skip_blanks($f, $m[1], $m[3]);
}
break;
case "ZEND_VM_CONTINUE_LABEL":
if ($kind == ZEND_VM_KIND_SWITCH) {
// Only SWITCH dispatch method use it
out($f,"zend_vm_continue:".$m[3]."\n");
} else {
skip_blanks($f, $m[1], $m[3]);
}
break;
case "ZEND_VM_DISPATCH":
// Emit code that dispatches to opcode handler
switch ($kind) {
case ZEND_VM_KIND_CALL:
out($f, $m[1]."if (EX(opline)->handler(&execute_data TSRMLS_CC) > 0)".$m[3]."\n");
break;
case ZEND_VM_KIND_SWITCH:
out($f, $m[1]."dispatch_handler = EX(opline)->handler;\nzend_vm_dispatch:\n".$m[1]."switch ((int)dispatch_handler)".$m[3]."\n");
break;
case ZEND_VM_KIND_GOTO:
out($f, $m[1]."goto *(void**)(EX(opline)->handler);".$m[3]."\n");
break;
}
break;
case "INTERNAL_EXECUTOR":
if ($kind == ZEND_VM_KIND_CALL) {
// Executor is defined as a set of functions
out($f, $m[1]."return;".$m[3]."\n");
} else {
// Emit executor code
gen_executor_code($f, $spec, $kind, $m[1]);
}
break;
case "EXTERNAL_EXECUTOR":
if ($kind == ZEND_VM_KIND_CALL) {
// Unspecialized executor with CALL threading is the same as the
// old one, so we don't need to produce code twitch
if (!$old || ZEND_VM_SPEC || (ZEND_VM_KIND != ZEND_VM_KIND_CALL)) {
out($f,"#undef EX\n");
out($f,"#define EX(element) execute_data->element\n\n");
// Emit executor code
gen_executor_code($f, $spec, $kind, $m[1]);
}
}
break;
case "INITIALIZER_NAME":
out($f, $m[1].$initializer_name.$m[3]."\n");
break;
case "EXTERNAL_LABELS":
// Emit code that initializes zend_opcode_handlers array
$prolog = $m[1];
if ($kind == ZEND_VM_KIND_GOTO) {
// Labels are defined in the executor itself, so we call it
// with op_array NULL and it sets zend_opcode_handlers array
out($f,$prolog."TSRMLS_FETCH();\n");
out($f,$prolog."zend_execute(NULL TSRMLS_CC);\n");
} else {
if ($old) {
// Reserving space for user-defined opcodes
out($f,$prolog."static opcode_handler_t labels[512] = {\n");
} else {
out($f,$prolog."static const opcode_handler_t labels[] = {\n");
}
gen_labels($f, $spec, $kind, $prolog."\t");
out($f,$prolog."};\n");
out($f,$prolog."zend_opcode_handlers = (opcode_handler_t*)labels;\n");
if ($old) {
// Setup old executor
out($f,$prolog."zend_vm_old_executor = 1;\n");
out($f,$prolog."zend_execute = old_execute;\n");
}
}
break;
default:
die("ERROR: Unknown keyword ".$m[2]." in skeleton file.\n");
}
} else {
// Copy the line as is
out($f, $line);
}
}
}
function gen_vm($def, $skel) {
global $definition_file, $skeleton_file, $executor_file,
$op_types, $list, $opcodes, $helpers, $params, $opnames;
// Load definition file
$in = @file($def);
if (!$in) {
die("ERROR: Can not open definition file '$def'\n");
}
// We need absolute path to definition file to use it in #line directives
$definition_file = realpath($def);
// Load skeleton file
$skl = @file($skel);
if (!$skl) {
die("ERROR: Can not open skeleton file '$skel'\n");
}
// We need absolute path to skeleton file to use it in #line directives
$skeleton_file = realpath($skel);
// Parse definition file into tree
$lineno = 0;
$handler = null;
$helper = null;
$max_opcode_len = 0;
$max_opcode = 0;
$export = array();
foreach ($in as $line) {
++$lineno;
if (strpos($line,"ZEND_VM_HANDLER(") === 0) {
// Parsing opcode handler's definition
if (preg_match(
"/^ZEND_VM_HANDLER\(\s*([0-9]+)\s*,\s*([A-Z_]+)\s*,\s*([A-Z|]+)\s*,\s*([A-Z|]+)\s*\)/",
$line,
$m) == 0) {
die("ERROR ($def:$lineno): Invalid ZEND_VM_HANDLER definition.\n");
}
$code = (int)$m[1];
$op = $m[2];
$len = strlen($op);
$op1 = array_flip(explode("|",$m[3]));
$op2 = array_flip(explode("|",$m[4]));
if ($len > $max_opcode_len) {
$max_opcode_len = $len;
}
if ($code > $max_opcode) {
$max_opcode = $code;
}
if (isset($opcodes[$code])) {
die("ERROR ($def:$lineno): Opcode with code '$code' is already defined.\n");
}
if (isset($opnames[$op])) {
die("ERROR ($def:$lineno): Opcode with name '$op' is already defined.\n");
}
$opcodes[$code] = array("op"=>$op,"op1"=>$op1,"op2"=>$op2,"code"=>"");
$opnames[$op] = $code;
$handler = $code;
$helper = null;
$list[$lineno] = array("handler"=>$handler);
} else if (strpos($line,"ZEND_VM_HELPER(") === 0) {
// Parsing helper's definition
if (preg_match(
"/^ZEND_VM_HELPER\(\s*([A-Za-z_]+)\s*,\s*([A-Z|]+)\s*,\s*([A-Z|]+)\s*\)/",
$line,
$m) == 0) {
die("ERROR ($def:$lineno): Invalid ZEND_VM_HELPER definition.\n");