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|
/*
+----------------------------------------------------------------------+
| PHP Version 7 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2017 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 |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Felipe Pena <felipe@php.net> |
| Authors: Joe Watkins <joe.watkins@live.co.uk> |
| Authors: Bob Weinand <bwoebi@php.net> |
+----------------------------------------------------------------------+
*/
#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 const char *phpdbg_decode_opcode(zend_uchar opcode) /* {{{ */
{
const char *ret = zend_get_opcode_name(opcode);
if (ret) {
return ret + 5; /* Skip ZEND_ prefix */
}
return "UNKNOWN";
} /* }}} */
static inline char *phpdbg_decode_op(zend_op_array *ops, znode_op *op, uint32_t type) /* {{{ */
{
char *decode = NULL;
switch (type) {
case IS_CV: {
zend_string *var = ops->vars[EX_VAR_TO_NUM(op->var)];
spprintf(&decode, 0, "$%.*s%c",
ZSTR_LEN(var) <= 19 ? (int) ZSTR_LEN(var) : 18,
ZSTR_VAL(var), ZSTR_LEN(var) <= 19 ? 0 : '+');
} break;
case IS_VAR:
spprintf(&decode, 0, "@%u", EX_VAR_TO_NUM(op->var) - ops->last_var);
break;
case IS_TMP_VAR:
spprintf(&decode, 0, "~%u", EX_VAR_TO_NUM(op->var) - ops->last_var);
break;
case IS_CONST: {
zval *literal = RT_CONSTANT(ops, *op);
decode = phpdbg_short_zval_print(literal, 20);
} break;
}
return decode;
} /* }}} */
char *phpdbg_decode_opline(zend_op_array *ops, zend_op *op) /*{{{ */
{
const char *opcode_name = phpdbg_decode_opcode(op->opcode);
char *result, *decode[4] = {NULL, NULL, NULL, NULL};
/* EX */
switch (op->opcode) {
case ZEND_FAST_CALL:
if (op->extended_value == ZEND_FAST_CALL_FROM_FINALLY) {
decode[0] = estrdup("FAST_CALL<FROM_FINALLY>");
}
break;
case ZEND_FAST_RET:
if (op->extended_value != 0) {
spprintf(&decode[0], 0, "FAST_RET<%s>",
op->extended_value == ZEND_FAST_RET_TO_CATCH ? "TO_CATCH" : "TO_FINALLY");
}
break;
}
/* OP1 */
switch (op->opcode) {
case ZEND_JMP:
case ZEND_FAST_CALL:
spprintf(&decode[1], 0, "J%td", OP_JMP_ADDR(op, op->op1) - ops->opcodes);
break;
case ZEND_INIT_FCALL:
case ZEND_RECV:
case ZEND_RECV_INIT:
case ZEND_RECV_VARIADIC:
spprintf(&decode[1], 0, "%" PRIu32, op->op1.num);
break;
default:
decode[1] = phpdbg_decode_op(ops, &op->op1, op->op1_type);
break;
}
/* OP2 */
switch (op->opcode) {
case ZEND_JMPZNZ:
spprintf(&decode[2], 0, "J%td or J%td",
OP_JMP_ADDR(op, op->op2) - ops->opcodes,
ZEND_OFFSET_TO_OPLINE(op, op->extended_value) - ops->opcodes);
break;
case ZEND_JMPZ:
case ZEND_JMPNZ:
case ZEND_JMPZ_EX:
case ZEND_JMPNZ_EX:
case ZEND_JMP_SET:
case ZEND_ASSERT_CHECK:
spprintf(&decode[2], 0, "J%td", OP_JMP_ADDR(op, op->op2) - ops->opcodes);
break;
case ZEND_FAST_CALL:
case ZEND_FAST_RET:
if (op->extended_value != 0) {
spprintf(&decode[2], 0, "J%" PRIu32, op->op2.opline_num);
}
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:
spprintf(&decode[2], 0, "%" PRIu32, op->op2.num);
break;
default:
decode[2] = phpdbg_decode_op(ops, &op->op2, op->op2_type);
break;
}
/* RESULT */
switch (op->opcode) {
case ZEND_CATCH:
spprintf(&decode[3], 0, "%" PRIu32, op->result.num);
break;
default:
decode[3] = phpdbg_decode_op(ops, &op->result, op->result_type);
break;
}
spprintf(&result, 0,
"%-23s %-20s %-20s %-20s",
decode[0] ? decode[0] : opcode_name,
decode[1] ? decode[1] : "",
decode[2] ? decode[2] : "",
decode[3] ? decode[3] : "");
if (decode[0])
efree(decode[0]);
if (decode[1])
efree(decode[1]);
if (decode[2])
efree(decode[2]);
if (decode[3])
efree(decode[3]);
return result;
} /* }}} */
void phpdbg_print_opline_ex(zend_execute_data *execute_data, 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);
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\" op=\"%s\" file=\"%s\"", "L%-5u %16p %s %s",
opline->lineno,
opline,
decode,
execute_data->func->op_array.filename ? ZSTR_VAL(execute_data->func->op_array.filename) : "unknown");
}
if (!ignore_flags && PHPDBG_G(oplog)) {
phpdbg_log_ex(fileno(PHPDBG_G(oplog)), "L%-5u %16p %s %s\n",
opline->lineno,
opline,
decode,
execute_data->func->op_array.filename ? ZSTR_VAL(execute_data->func->op_array.filename) : "unknown");
}
efree(decode);
}
if (PHPDBG_G(oplog_list)) {
phpdbg_oplog_entry *cur = zend_arena_alloc(&PHPDBG_G(oplog_arena), sizeof(phpdbg_oplog_entry));
zend_op_array *op_array = &execute_data->func->op_array;
cur->op = (zend_op *) execute_data->opline;
cur->opcodes = op_array->opcodes;
cur->filename = op_array->filename;
cur->scope = op_array->scope;
cur->function_name = op_array->function_name;
cur->next = NULL;
PHPDBG_G(oplog_cur)->next = cur;
PHPDBG_G(oplog_cur) = cur;
}
} /* }}} */
void phpdbg_print_opline(zend_execute_data *execute_data, zend_bool ignore_flags) /* {{{ */
{
phpdbg_print_opline_ex(execute_data, ignore_flags);
} /* }}} */
|
