1 files changed, 471 insertions, 0 deletions

diff --git a/Zend/zend_opcode.c b/Zend/zend_opcode.c
new file mode 100644
index 000000000..26da898b2
--- /dev/null
+++ b/Zend/zend_opcode.c
@@ -0,0 +1,471 @@
+/*
+   +----------------------------------------------------------------------+
+   | Zend Engine                                                          |
+   +----------------------------------------------------------------------+
+   | Copyright (c) 1998-2004 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>                                |
+   +----------------------------------------------------------------------+
+*/
+
+/* $Id: zend_opcode.c,v 1.103 2004/06/06 08:37:12 sesser Exp $ */
+
+#include <stdio.h>
+
+#include "zend.h"
+#include "zend_alloc.h"
+#include "zend_compile.h"
+#include "zend_extensions.h"
+#include "zend_API.h"
+
+static void zend_extension_op_array_ctor_handler(zend_extension *extension, zend_op_array *op_array TSRMLS_DC)
+{
+	if (extension->op_array_ctor) {
+		extension->op_array_ctor(op_array);
+	}
+}
+
+static void zend_extension_op_array_dtor_handler(zend_extension *extension, zend_op_array *op_array TSRMLS_DC)
+{
+	if (extension->op_array_dtor) {
+		extension->op_array_dtor(op_array);
+	}
+}
+
+static void op_array_alloc_ops(zend_op_array *op_array)
+{
+	op_array->opcodes = erealloc(op_array->opcodes, (op_array->size)*sizeof(zend_op));
+}
+
+void init_op_array(zend_op_array *op_array, zend_uchar type, int initial_ops_size TSRMLS_DC)
+{
+	op_array->type = type;
+
+	op_array->backpatch_count = 0;
+	if (CG(interactive)) {
+		/* We must avoid a realloc() on the op_array in interactive mode, since pointers to constants
+		 * will become invalid
+		 */
+		initial_ops_size = 8192;
+	}
+
+	op_array->refcount = (zend_uint *) emalloc(sizeof(zend_uint));
+	*op_array->refcount = 1;
+	op_array->size = initial_ops_size;
+	op_array->last = 0;
+	op_array->opcodes = NULL;
+	op_array_alloc_ops(op_array);
+
+	op_array->T = 0;
+
+	op_array->function_name = NULL;
+	op_array->filename = zend_get_compiled_filename(TSRMLS_C);
+	op_array->doc_comment = NULL;
+	op_array->doc_comment_len = 0;
+
+	op_array->arg_info = NULL;
+	op_array->num_args = 0;
+	op_array->required_num_args = 0;
+
+	op_array->scope = NULL;
+
+	op_array->brk_cont_array = NULL;
+	op_array->try_catch_array = NULL;
+	op_array->last_brk_cont = 0;
+	op_array->current_brk_cont = -1;
+
+	op_array->static_variables = NULL;
+	op_array->last_try_catch = 0;
+
+	op_array->return_reference = 0;
+	op_array->done_pass_two = 0;
+
+	op_array->uses_this = 0;
+
+	op_array->start_op = NULL;
+
+	zend_llist_apply_with_argument(&zend_extensions, (llist_apply_with_arg_func_t) zend_extension_op_array_ctor_handler, op_array TSRMLS_CC);
+}
+
+ZEND_API void destroy_zend_function(zend_function *function TSRMLS_DC)
+{
+	switch (function->type) {
+		case ZEND_USER_FUNCTION:
+			destroy_op_array((zend_op_array *) function TSRMLS_CC);
+			break;
+		case ZEND_INTERNAL_FUNCTION:
+			/* do nothing */
+			break;
+	}
+}
+
+ZEND_API void zend_function_dtor(zend_function *function)
+{
+	TSRMLS_FETCH();
+
+	destroy_zend_function(function TSRMLS_CC);
+}
+
+static void zend_cleanup_op_array_data(zend_op_array *op_array)
+{
+	if (op_array->static_variables) {
+		zend_hash_clean(op_array->static_variables);
+	}
+}
+
+ZEND_API int zend_cleanup_function_data(zend_function *function TSRMLS_DC)
+{
+	if (function->type == ZEND_USER_FUNCTION) {
+		zend_cleanup_op_array_data((zend_op_array *) function);
+	}	
+	return 0;
+}
+
+ZEND_API int zend_cleanup_class_data(zend_class_entry **pce TSRMLS_DC)
+{
+	if ((*pce)->type == ZEND_USER_CLASS) {
+		/* Clean all parts that can contain run-time data */
+		/* Note that only run-time accessed data need to be cleaned up, pre-defined data can
+		   not contain objects and thus are not probelmatic */
+		zend_hash_clean((*pce)->static_members);
+		zend_hash_apply(&(*pce)->function_table, (apply_func_t) zend_cleanup_function_data TSRMLS_CC);
+	}
+	return 0;
+}
+
+ZEND_API void destroy_zend_class(zend_class_entry **pce)
+{
+	zend_class_entry *ce = *pce;
+	
+	if (--ce->refcount > 0) {
+		return;
+	}
+	switch (ce->type) {
+		case ZEND_USER_CLASS:
+			zend_hash_destroy(&ce->default_properties);
+			zend_hash_destroy(&ce->properties_info);
+			zend_hash_destroy(ce->static_members);
+			efree(ce->name);
+			zend_hash_destroy(&ce->function_table);
+			FREE_HASHTABLE(ce->static_members);
+			zend_hash_destroy(&ce->constants_table);
+			if (ce->num_interfaces > 0 && ce->interfaces) {
+				efree(ce->interfaces);
+			}
+			if (ce->doc_comment) {
+				efree(ce->doc_comment);
+			}
+			efree(ce);
+			break;
+		case ZEND_INTERNAL_CLASS:
+			zend_hash_destroy(&ce->default_properties);
+			zend_hash_destroy(&ce->properties_info);
+			zend_hash_destroy(ce->static_members);
+			free(ce->name);
+			zend_hash_destroy(&ce->function_table);
+			free(ce->static_members);
+			zend_hash_destroy(&ce->constants_table);
+			if (ce->num_interfaces > 0) {
+				free(ce->interfaces);
+			}
+			if (ce->doc_comment) {
+				free(ce->doc_comment);
+			}
+			free(ce);
+			break;
+	}
+}
+
+void zend_class_add_ref(zend_class_entry **ce)
+{
+	(*ce)->refcount++;
+}
+
+ZEND_API void destroy_op_array(zend_op_array *op_array TSRMLS_DC)
+{
+	zend_op *opline = op_array->opcodes;
+	zend_op *end = op_array->opcodes+op_array->last;
+	zend_uint i;
+
+	if (op_array->static_variables) {
+		zend_hash_destroy(op_array->static_variables);
+		FREE_HASHTABLE(op_array->static_variables);
+	}
+
+	if (--(*op_array->refcount)>0) {
+		return;
+	}
+
+	efree(op_array->refcount);
+
+	while (opline<end) {
+		if (opline->op1.op_type==IS_CONST) {
+#if DEBUG_ZEND>2
+			printf("Reducing refcount for %x 1=>0 (destroying)\n", &opline->op1.u.constant);
+#endif
+			zval_dtor(&opline->op1.u.constant);
+		}
+		if (opline->op2.op_type==IS_CONST) {
+#if DEBUG_ZEND>2
+			printf("Reducing refcount for %x 1=>0 (destroying)\n", &opline->op2.u.constant);
+#endif
+			zval_dtor(&opline->op2.u.constant);
+		}
+		opline++;
+	}
+	efree(op_array->opcodes);
+	if (op_array->function_name) {
+		efree(op_array->function_name);
+	}
+	if (op_array->doc_comment) {
+		efree(op_array->doc_comment);
+	}
+	if (op_array->brk_cont_array) {
+		efree(op_array->brk_cont_array);
+	}
+	if (op_array->try_catch_array) {
+		efree(op_array->try_catch_array);
+	}
+	if (op_array->done_pass_two) {
+		zend_llist_apply_with_argument(&zend_extensions, (llist_apply_with_arg_func_t) zend_extension_op_array_dtor_handler, op_array TSRMLS_CC);
+	}
+	if (op_array->arg_info) {
+		for (i=0; i<op_array->num_args; i++) {
+			efree(op_array->arg_info[i].name);
+			if (op_array->arg_info[i].class_name) {
+				efree(op_array->arg_info[i].class_name);
+			}
+		}
+		efree(op_array->arg_info);
+	}
+}
+
+void init_op(zend_op *op TSRMLS_DC)
+{
+	memset(op, 0, sizeof(zend_op));
+	op->lineno = CG(zend_lineno);
+	SET_UNUSED(op->result);
+}
+
+zend_op *get_next_op(zend_op_array *op_array TSRMLS_DC)
+{
+	zend_uint next_op_num = op_array->last++;
+	zend_op *next_op;
+
+	if (next_op_num >= op_array->size) {
+		if (CG(interactive)) {
+			/* we messed up */
+			zend_printf("Ran out of opcode space!\n"
+						"You should probably consider writing this huge script into a file!\n");
+			zend_bailout();
+		}
+		op_array->size *= 4;
+		op_array_alloc_ops(op_array);
+	}
+	
+	next_op = &(op_array->opcodes[next_op_num]);
+	
+	init_op(next_op TSRMLS_CC);
+
+	return next_op;
+}
+
+int get_next_op_number(zend_op_array *op_array)
+{
+	return op_array->last;
+}
+
+zend_brk_cont_element *get_next_brk_cont_element(zend_op_array *op_array)
+{
+	op_array->last_brk_cont++;
+	op_array->brk_cont_array = erealloc(op_array->brk_cont_array, sizeof(zend_brk_cont_element)*op_array->last_brk_cont);
+	return &op_array->brk_cont_array[op_array->last_brk_cont-1];
+}
+
+static void zend_update_extended_info(zend_op_array *op_array TSRMLS_DC)
+{
+	zend_op *opline = op_array->opcodes, *end=opline+op_array->last;
+
+	while (opline<end) {
+		if (opline->opcode == ZEND_EXT_STMT) {
+			if (opline+1<end) {
+				if ((opline+1)->opcode == ZEND_EXT_STMT) {
+					opline->opcode = ZEND_NOP;
+					opline++;
+					continue;
+				}
+				if (opline+1<end) {
+					opline->lineno = (opline+1)->lineno;
+				}
+			} else {
+				opline->opcode = ZEND_NOP;
+			}
+		}
+		opline++;
+	}
+}
+
+static void zend_extension_op_array_handler(zend_extension *extension, zend_op_array *op_array TSRMLS_DC)
+{
+	if (extension->op_array_handler) {
+		extension->op_array_handler(op_array);
+	}
+}
+
+int pass_two(zend_op_array *op_array TSRMLS_DC)
+{
+	zend_op *opline, *end;
+
+	if (op_array->type!=ZEND_USER_FUNCTION && op_array->type!=ZEND_EVAL_CODE) {
+		return 0;
+	}
+	if (CG(extended_info)) {
+		zend_update_extended_info(op_array TSRMLS_CC);
+	}
+	if (CG(handle_op_arrays)) {
+		zend_llist_apply_with_argument(&zend_extensions, (llist_apply_with_arg_func_t) zend_extension_op_array_handler, op_array TSRMLS_CC);
+	}
+
+	op_array->opcodes = (zend_op *) erealloc(op_array->opcodes, sizeof(zend_op)*op_array->last);
+	op_array->size = op_array->last;
+
+	opline = op_array->opcodes;
+	end = opline + op_array->last;
+	while (opline < end) {
+		if (opline->op1.op_type == IS_CONST) {
+			opline->op1.u.constant.is_ref = 1;
+			opline->op1.u.constant.refcount = 2; /* Make sure is_ref won't be reset */
+		}
+		if (opline->op2.op_type == IS_CONST) {
+			opline->op2.u.constant.is_ref = 1;
+			opline->op2.u.constant.refcount = 2;
+		}
+		switch (opline->opcode) {
+			case ZEND_JMP:
+				opline->op1.u.jmp_addr = &op_array->opcodes[opline->op1.u.opline_num];
+				break;
+			case ZEND_JMPZ:
+			case ZEND_JMPNZ:
+			case ZEND_JMPZ_EX:
+			case ZEND_JMPNZ_EX:
+				opline->op2.u.jmp_addr = &op_array->opcodes[opline->op2.u.opline_num];
+				break;
+		}
+		opline->handler = zend_opcode_handlers[opline->opcode];
+		opline++;
+	}
+	
+	op_array->done_pass_two = 1;
+	return 0;
+}
+
+int print_class(zend_class_entry *class_entry TSRMLS_DC)
+{
+	printf("Class %s:\n", class_entry->name);
+	zend_hash_apply(&class_entry->function_table, (apply_func_t) pass_two TSRMLS_CC);
+	printf("End of class %s.\n\n", class_entry->name);
+	return 0;
+}
+
+ZEND_API unary_op_type get_unary_op(int opcode)
+{
+	switch (opcode) {
+		case ZEND_BW_NOT:
+			return (unary_op_type) bitwise_not_function;
+			break;
+		case ZEND_BOOL_NOT:
+			return (unary_op_type) boolean_not_function;
+			break;
+		default:
+			return (unary_op_type) NULL;
+			break;
+	}
+}
+
+ZEND_API void *get_binary_op(int opcode)
+{
+	switch (opcode) {
+		case ZEND_ADD:
+		case ZEND_ASSIGN_ADD:
+			return (void *) add_function;
+			break;
+		case ZEND_SUB:
+		case ZEND_ASSIGN_SUB:
+			return (void *) sub_function;
+			break;
+		case ZEND_MUL:
+		case ZEND_ASSIGN_MUL:
+			return (void *) mul_function;
+			break;
+		case ZEND_DIV:
+		case ZEND_ASSIGN_DIV:
+			return (void *) div_function;
+			break;
+		case ZEND_MOD:
+		case ZEND_ASSIGN_MOD:
+			return (void *) mod_function;
+			break;
+		case ZEND_SL:
+		case ZEND_ASSIGN_SL:
+			return (void *) shift_left_function;
+			break;
+		case ZEND_SR:
+		case ZEND_ASSIGN_SR:
+			return (void *) shift_right_function;
+			break;
+		case ZEND_CONCAT:
+		case ZEND_ASSIGN_CONCAT:
+			return (void *) concat_function;
+			break;
+		case ZEND_IS_IDENTICAL:
+			return (void *) is_identical_function;
+			break;
+		case ZEND_IS_NOT_IDENTICAL:
+			return (void *) is_not_identical_function;
+			break;
+		case ZEND_IS_EQUAL:
+			return (void *) is_equal_function;
+			break;
+		case ZEND_IS_NOT_EQUAL:
+			return (void *) is_not_equal_function;
+			break;
+		case ZEND_IS_SMALLER:
+			return (void *) is_smaller_function;
+			break;
+		case ZEND_IS_SMALLER_OR_EQUAL:
+			return (void *) is_smaller_or_equal_function;
+			break;
+		case ZEND_BW_OR:
+		case ZEND_ASSIGN_BW_OR:
+			return (void *) bitwise_or_function;
+			break;
+		case ZEND_BW_AND:
+		case ZEND_ASSIGN_BW_AND:
+			return (void *) bitwise_and_function;
+			break;
+		case ZEND_BW_XOR:
+		case ZEND_ASSIGN_BW_XOR:
+			return (void *) bitwise_xor_function;
+			break;
+		default:
+			return (void *) NULL;
+			break;
+	}
+}
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * indent-tabs-mode: t
+ * End:
+ */