1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 7 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1997-2018 The PHP Group |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 3.01 of the PHP license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.php.net/license/3_01.txt |
11 | If you did not receive a copy of the PHP license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@php.net so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Authors: Felipe Pena <felipe@php.net> |
16 | Authors: Joe Watkins <joe.watkins@live.co.uk> |
17 | Authors: Bob Weinand <bwoebi@php.net> |
18 +----------------------------------------------------------------------+
19 */
20
21 #include "phpdbg.h"
22 #include "zend_vm_opcodes.h"
23 #include "zend_compile.h"
24 #include "phpdbg_opcode.h"
25 #include "phpdbg_utils.h"
26 #include "ext/standard/php_string.h"
27
ZEND_EXTERN_MODULE_GLOBALS(phpdbg)28 ZEND_EXTERN_MODULE_GLOBALS(phpdbg)
29
30 static inline const char *phpdbg_decode_opcode(zend_uchar opcode) /* {{{ */
31 {
32 const char *ret = zend_get_opcode_name(opcode);
33 if (ret) {
34 return ret + 5; /* Skip ZEND_ prefix */
35 }
36 return "UNKNOWN";
37 } /* }}} */
38
phpdbg_decode_op(zend_op_array * ops,const zend_op * opline,const znode_op * op,uint32_t type)39 static inline char *phpdbg_decode_op(
40 zend_op_array *ops, const zend_op *opline, const znode_op *op, uint32_t type) /* {{{ */
41 {
42 char *decode = NULL;
43
44 switch (type) {
45 case IS_CV: {
46 zend_string *var = ops->vars[EX_VAR_TO_NUM(op->var)];
47 spprintf(&decode, 0, "$%.*s%c",
48 ZSTR_LEN(var) <= 19 ? (int) ZSTR_LEN(var) : 18,
49 ZSTR_VAL(var), ZSTR_LEN(var) <= 19 ? 0 : '+');
50 } break;
51
52 case IS_VAR:
53 spprintf(&decode, 0, "@%u", EX_VAR_TO_NUM(op->var) - ops->last_var);
54 break;
55 case IS_TMP_VAR:
56 spprintf(&decode, 0, "~%u", EX_VAR_TO_NUM(op->var) - ops->last_var);
57 break;
58 case IS_CONST: {
59 zval *literal = RT_CONSTANT(opline, *op);
60 decode = phpdbg_short_zval_print(literal, 20);
61 } break;
62 }
63 return decode;
64 } /* }}} */
65
phpdbg_decode_input_op(zend_op_array * ops,const zend_op * opline,znode_op op,zend_uchar op_type,uint32_t flags)66 char *phpdbg_decode_input_op(
67 zend_op_array *ops, const zend_op *opline, znode_op op, zend_uchar op_type,
68 uint32_t flags) {
69 char *result = NULL;
70 if (op_type != IS_UNUSED) {
71 result = phpdbg_decode_op(ops, opline, &op, op_type);
72 } else if (ZEND_VM_OP_JMP_ADDR == (flags & ZEND_VM_OP_MASK)) {
73 spprintf(&result, 0, "J%td", OP_JMP_ADDR(opline, op) - ops->opcodes);
74 } else if (ZEND_VM_OP_NUM == (flags & ZEND_VM_OP_MASK)) {
75 spprintf(&result, 0, "%" PRIu32, op.num);
76 } else if (ZEND_VM_OP_TRY_CATCH == (flags & ZEND_VM_OP_MASK)) {
77 if (op.num != (uint32_t)-1) {
78 spprintf(&result, 0, "try-catch(%" PRIu32 ")", op.num);
79 }
80 } else if (ZEND_VM_OP_THIS == (flags & ZEND_VM_OP_MASK)) {
81 result = estrdup("THIS");
82 } else if (ZEND_VM_OP_NEXT == (flags & ZEND_VM_OP_MASK)) {
83 result = estrdup("NEXT");
84 } else if (ZEND_VM_OP_CLASS_FETCH == (flags & ZEND_VM_OP_MASK)) {
85 //zend_dump_class_fetch_type(op.num);
86 } else if (ZEND_VM_OP_CONSTRUCTOR == (flags & ZEND_VM_OP_MASK)) {
87 result = estrdup("CONSTRUCTOR");
88 }
89 return result;
90 }
91
phpdbg_decode_opline(zend_op_array * ops,zend_op * opline)92 char *phpdbg_decode_opline(zend_op_array *ops, zend_op *opline) /*{{{ */
93 {
94 const char *opcode_name = phpdbg_decode_opcode(opline->opcode);
95 uint32_t flags = zend_get_opcode_flags(opline->opcode);
96 char *result, *decode[4] = {NULL, NULL, NULL, NULL};
97
98 /* OpcodeName */
99 if (opline->extended_value) {
100 spprintf(&decode[0], 0, "%s<%" PRIi32 ">", opcode_name, opline->extended_value);
101 }
102
103 /* OP1 */
104 decode[1] = phpdbg_decode_input_op(
105 ops, opline, opline->op1, opline->op1_type, ZEND_VM_OP1_FLAGS(flags));
106
107 /* OP2 */
108 decode[2] = phpdbg_decode_input_op(
109 ops, opline, opline->op2, opline->op2_type, ZEND_VM_OP2_FLAGS(flags));
110
111 /* RESULT */
112 switch (opline->opcode) {
113 case ZEND_CATCH:
114 if (opline->extended_value & ZEND_LAST_CATCH) {
115 if (decode[2]) {
116 efree(decode[2]);
117 decode[2] = NULL;
118 }
119 }
120 decode[3] = phpdbg_decode_op(ops, opline, &opline->result, opline->result_type);
121 break;
122 default:
123 decode[3] = phpdbg_decode_op(ops, opline, &opline->result, opline->result_type);
124 break;
125 }
126
127 spprintf(&result, 0,
128 "%-23s %-20s %-20s %-20s",
129 decode[0] ? decode[0] : opcode_name,
130 decode[1] ? decode[1] : "",
131 decode[2] ? decode[2] : "",
132 decode[3] ? decode[3] : "");
133
134 if (decode[0])
135 efree(decode[0]);
136 if (decode[1])
137 efree(decode[1]);
138 if (decode[2])
139 efree(decode[2]);
140 if (decode[3])
141 efree(decode[3]);
142
143 return result;
144 } /* }}} */
145
phpdbg_print_opline_ex(zend_execute_data * execute_data,zend_bool ignore_flags)146 void phpdbg_print_opline_ex(zend_execute_data *execute_data, zend_bool ignore_flags) /* {{{ */
147 {
148 /* force out a line while stepping so the user knows what is happening */
149 if (ignore_flags ||
150 (!(PHPDBG_G(flags) & PHPDBG_IS_QUIET) ||
151 (PHPDBG_G(flags) & PHPDBG_IS_STEPPING) ||
152 (PHPDBG_G(oplog)))) {
153
154 zend_op *opline = (zend_op *) execute_data->opline;
155 char *decode = phpdbg_decode_opline(&execute_data->func->op_array, opline);
156
157 if (ignore_flags || (!(PHPDBG_G(flags) & PHPDBG_IS_QUIET) || (PHPDBG_G(flags) & PHPDBG_IS_STEPPING))) {
158 /* output line info */
159 phpdbg_notice("opline", "line=\"%u\" opline=\"%p\" op=\"%s\" file=\"%s\"", "L%-5u %16p %s %s",
160 opline->lineno,
161 opline,
162 decode,
163 execute_data->func->op_array.filename ? ZSTR_VAL(execute_data->func->op_array.filename) : "unknown");
164 }
165
166 if (!ignore_flags && PHPDBG_G(oplog)) {
167 phpdbg_log_ex(fileno(PHPDBG_G(oplog)), "L%-5u %16p %s %s\n",
168 opline->lineno,
169 opline,
170 decode,
171 execute_data->func->op_array.filename ? ZSTR_VAL(execute_data->func->op_array.filename) : "unknown");
172 }
173
174 efree(decode);
175 }
176
177 if (PHPDBG_G(oplog_list)) {
178 phpdbg_oplog_entry *cur = zend_arena_alloc(&PHPDBG_G(oplog_arena), sizeof(phpdbg_oplog_entry));
179 zend_op_array *op_array = &execute_data->func->op_array;
180 cur->op = (zend_op *) execute_data->opline;
181 cur->opcodes = op_array->opcodes;
182 cur->filename = op_array->filename;
183 cur->scope = op_array->scope;
184 cur->function_name = op_array->function_name;
185 cur->next = NULL;
186 PHPDBG_G(oplog_cur)->next = cur;
187 PHPDBG_G(oplog_cur) = cur;
188 }
189 } /* }}} */
190
phpdbg_print_opline(zend_execute_data * execute_data,zend_bool ignore_flags)191 void phpdbg_print_opline(zend_execute_data *execute_data, zend_bool ignore_flags) /* {{{ */
192 {
193 phpdbg_print_opline_ex(execute_data, ignore_flags);
194 } /* }}} */
195
