forked from php/php-src
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathphpdbg_opcode.c
239 lines (213 loc) · 7.09 KB
/
phpdbg_opcode.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
/*
+----------------------------------------------------------------------+
| PHP Version 7 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2015 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP 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.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Felipe Pena <[email protected]> |
| Authors: Joe Watkins <[email protected]> |
| Authors: Bob Weinand <[email protected]> |
+----------------------------------------------------------------------+
*/
#include "phpdbg.h"
#include "zend_vm_opcodes.h"
#include "zend_compile.h"
#include "phpdbg_opcode.h"
#include "phpdbg_utils.h"
#include "ext/standard/php_string.h"
ZEND_EXTERN_MODULE_GLOBALS(phpdbg);
static inline char *phpdbg_decode_op(zend_op_array *ops, znode_op *op, uint32_t type, HashTable *vars) /* {{{ */
{
char *decode = NULL;
switch (type &~ EXT_TYPE_UNUSED) {
case IS_CV: {
zend_string *var = ops->vars[EX_VAR_TO_NUM(op->var)];
asprintf(&decode, "$%.*s%c", var->len <= 19 ? (int) var->len : 18, var->val, var->len <= 19 ? 0 : '+');
} break;
case IS_VAR:
case IS_TMP_VAR: {
zend_ulong id = 0, *pid = NULL;
if (vars != NULL) {
if ((pid = zend_hash_index_find_ptr(vars, (zend_ulong) ops->vars - op->var))) {
id = *pid;
} else {
id = zend_hash_num_elements(vars);
zend_hash_index_update_mem(vars, (zend_ulong) ops->vars - op->var, &id, sizeof(zend_ulong));
}
}
asprintf(&decode, "@" ZEND_ULONG_FMT, id);
} break;
case IS_CONST: {
zval *literal = RT_CONSTANT(ops, *op);
switch (Z_TYPE_P(literal)) {
case IS_UNDEF:
decode = zend_strndup("", 0);
break;
case IS_NULL:
decode = zend_strndup(ZEND_STRL("null"));
break;
case IS_FALSE:
decode = zend_strndup(ZEND_STRL("false"));
break;
case IS_TRUE:
decode = zend_strndup(ZEND_STRL("true"));
break;
case IS_LONG:
asprintf(&decode, ZEND_ULONG_FMT, Z_LVAL_P(literal));
break;
case IS_DOUBLE:
asprintf(&decode, "%.*G", 14, Z_DVAL_P(literal));
break;
case IS_STRING: {
int i;
zend_string *str = php_addcslashes(Z_STR_P(literal), 0, "\\\"", 2);
for (i = 0; i < str->len; i++) {
if (str->val[i] < 32) {
str->val[i] = ' ';
}
}
asprintf(&decode, "\"%.*s\"%c", str->len <= 18 ? (int) str->len : 17, str->val, str->len <= 18 ? 0 : '+');
zend_string_release(str);
} break;
case IS_RESOURCE:
asprintf(&decode, "Rsrc #%d", Z_RES_HANDLE_P(literal));
break;
case IS_ARRAY:
asprintf(&decode, "array(%d)", zend_hash_num_elements(Z_ARR_P(literal)));
break;
case IS_OBJECT: {
zend_string *str = Z_OBJCE_P(literal)->name;
asprintf(&decode, "%.*s%c", str->len <= 18 ? (int) str->len : 18, str->val, str->len <= 18 ? 0 : '+');
} break;
case IS_CONSTANT:
decode = zend_strndup(ZEND_STRL("<constant>"));
break;
case IS_CONSTANT_AST:
decode = zend_strndup(ZEND_STRL("<ast>"));
break;
default:
asprintf(&decode, "unknown type: %d", Z_TYPE_P(literal));
break;
}
} break;
case IS_UNUSED:
return NULL;
}
return decode;
} /* }}} */
char *phpdbg_decode_opline(zend_op_array *ops, zend_op *op, HashTable *vars) /*{{{ */
{
char *decode[4] = {NULL, NULL, NULL, NULL};
/* OP1 */
switch (op->opcode) {
case ZEND_JMP:
case ZEND_GOTO:
case ZEND_FAST_CALL:
asprintf(&decode[1], "J%ld", OP_JMP_ADDR(op, op->op1) - ops->opcodes);
break;
case ZEND_INIT_FCALL:
case ZEND_RECV:
case ZEND_RECV_INIT:
case ZEND_RECV_VARIADIC:
asprintf(&decode[1], "%" PRIu32, op->op1.num);
break;
default:
decode[1] = phpdbg_decode_op(ops, &op->op1, op->op1_type, vars);
break;
}
/* OP2 */
switch (op->opcode) {
/* TODO: ZEND_FAST_CALL, ZEND_FAST_RET op2 */
case ZEND_JMPZNZ:
asprintf(&decode[2], "J%u or J%" PRIu32, op->op2.opline_num, op->extended_value);
break;
case ZEND_JMPZ:
case ZEND_JMPNZ:
case ZEND_JMPZ_EX:
case ZEND_JMPNZ_EX:
case ZEND_JMP_SET:
asprintf(&decode[2], "J%ld", OP_JMP_ADDR(op, op->op2) - ops->opcodes);
break;
case ZEND_SEND_VAL:
case ZEND_SEND_VAL_EX:
case ZEND_SEND_VAR:
case ZEND_SEND_VAR_NO_REF:
case ZEND_SEND_REF:
case ZEND_SEND_VAR_EX:
case ZEND_SEND_USER:
asprintf(&decode[2], "%" PRIu32, op->op2.num);
break;
default:
decode[2] = phpdbg_decode_op(ops, &op->op2, op->op2_type, vars);
break;
}
/* RESULT */
switch (op->opcode) {
case ZEND_CATCH:
asprintf(&decode[2], "%" PRIu32, op->result.num);
break;
default:
decode[3] = phpdbg_decode_op(ops, &op->result, op->result_type, vars);
break;
}
asprintf(&decode[0],
"%-20s %-20s %-20s",
decode[1] ? decode[1] : "",
decode[2] ? decode[2] : "",
decode[3] ? decode[3] : "");
if (decode[1])
free(decode[1]);
if (decode[2])
free(decode[2]);
if (decode[3])
free(decode[3]);
return decode[0];
} /* }}} */
void phpdbg_print_opline_ex(zend_execute_data *execute_data, HashTable *vars, zend_bool ignore_flags) /* {{{ */
{
/* force out a line while stepping so the user knows what is happening */
if (ignore_flags ||
(!(PHPDBG_G(flags) & PHPDBG_IS_QUIET) ||
(PHPDBG_G(flags) & PHPDBG_IS_STEPPING) ||
(PHPDBG_G(oplog)))) {
zend_op *opline = (zend_op *) execute_data->opline;
char *decode = phpdbg_decode_opline(&execute_data->func->op_array, opline, vars);
if (ignore_flags || (!(PHPDBG_G(flags) & PHPDBG_IS_QUIET) || (PHPDBG_G(flags) & PHPDBG_IS_STEPPING))) {
/* output line info */
phpdbg_notice("opline", "line=\"%u\" opline=\"%p\" opcode=\"%s\" op=\"%s\" file=\"%s\"", "L%-5u %16p %-30s %s %s",
opline->lineno,
opline,
phpdbg_decode_opcode(opline->opcode),
decode,
execute_data->func->op_array.filename ? execute_data->func->op_array.filename->val : "unknown");
}
if (!ignore_flags && PHPDBG_G(oplog)) {
phpdbg_log_ex(fileno(PHPDBG_G(oplog)), "L%-5u %16p %-30s %s %s",
opline->lineno,
opline,
phpdbg_decode_opcode(opline->opcode),
decode,
execute_data->func->op_array.filename ? execute_data->func->op_array.filename->val : "unknown");
}
if (decode) {
free(decode);
}
}
} /* }}} */
void phpdbg_print_opline(zend_execute_data *execute_data, zend_bool ignore_flags) /* {{{ */
{
phpdbg_print_opline_ex(execute_data, NULL, ignore_flags);
} /* }}} */
const char *phpdbg_decode_opcode(zend_uchar opcode) /* {{{ */
{
const char *ret = zend_get_opcode_name(opcode);
return ret?ret:"UNKNOWN";
} /* }}} */