1 /*
2    +----------------------------------------------------------------------+
3    | PHP Version 7                                                        |
4    +----------------------------------------------------------------------+
5    | Copyright (c) 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 <stdio.h>
22 #include <string.h>
23 #include "zend.h"
24 #include "zend_compile.h"
25 #include "zend_exceptions.h"
26 #include "zend_vm.h"
27 #include "zend_generators.h"
28 #include "zend_interfaces.h"
29 #include "zend_smart_str.h"
30 #include "phpdbg.h"
31 #include "phpdbg_io.h"
32 
33 #include "phpdbg_help.h"
34 #include "phpdbg_print.h"
35 #include "phpdbg_info.h"
36 #include "phpdbg_break.h"
37 #include "phpdbg_opcode.h"
38 #include "phpdbg_list.h"
39 #include "phpdbg_utils.h"
40 #include "phpdbg_prompt.h"
41 #include "phpdbg_cmd.h"
42 #include "phpdbg_set.h"
43 #include "phpdbg_frame.h"
44 #include "phpdbg_lexer.h"
45 #include "phpdbg_parser.h"
46 #include "phpdbg_wait.h"
47 #include "phpdbg_eol.h"
48 
49 #if ZEND_VM_KIND != ZEND_VM_KIND_CALL && ZEND_VM_KIND != ZEND_VM_KIND_HYBRID
50 #error "phpdbg can only be built with CALL zend vm kind"
51 #endif
52 
53 ZEND_EXTERN_MODULE_GLOBALS(phpdbg)
54 extern int phpdbg_startup_run;
55 
56 #ifdef HAVE_LIBDL
57 #ifdef PHP_WIN32
58 #include "win32/param.h"
59 #include "win32/winutil.h"
60 #define GET_DL_ERROR()  php_win_err()
61 #else
62 #include <sys/param.h>
63 #define GET_DL_ERROR()  DL_ERROR()
64 #endif
65 #endif
66 
67 /* {{{ command declarations */
68 const phpdbg_command_t phpdbg_prompt_commands[] = {
69 	PHPDBG_COMMAND_D(exec,      "set execution context",                    'e', NULL, "s", 0),
70 	PHPDBG_COMMAND_D(stdin,     "read script from stdin",                    0 , NULL, "s", 0),
71 	PHPDBG_COMMAND_D(step,      "step through execution",                   's', NULL, 0, PHPDBG_ASYNC_SAFE),
72 	PHPDBG_COMMAND_D(continue,  "continue execution",                       'c', NULL, 0, PHPDBG_ASYNC_SAFE),
73 	PHPDBG_COMMAND_D(run,       "attempt execution",                        'r', NULL, "|s", 0),
74 	PHPDBG_COMMAND_D(ev,        "evaluate some code",                        0 , NULL, "i", PHPDBG_ASYNC_SAFE), /* restricted ASYNC_SAFE */
75 	PHPDBG_COMMAND_D(until,     "continue past the current line",           'u', NULL, 0, 0),
76 	PHPDBG_COMMAND_D(finish,    "continue past the end of the stack",       'F', NULL, 0, 0),
77 	PHPDBG_COMMAND_D(leave,     "continue until the end of the stack",      'L', NULL, 0, 0),
78 	PHPDBG_COMMAND_D(generator, "inspect or switch to a generator",         'g', NULL, "|n", 0),
79 	PHPDBG_COMMAND_D(print,     "print something",                          'p', phpdbg_print_commands, "|*c", 0),
80 	PHPDBG_COMMAND_D(break,     "set breakpoint",                           'b', phpdbg_break_commands, "|*c", 0),
81 	PHPDBG_COMMAND_D(back,      "show trace",                               't', NULL, "|n", PHPDBG_ASYNC_SAFE),
82 	PHPDBG_COMMAND_D(frame,     "switch to a frame",                        'f', NULL, "|n", PHPDBG_ASYNC_SAFE),
83 	PHPDBG_COMMAND_D(list,      "lists some code",                          'l', phpdbg_list_commands,  "*", PHPDBG_ASYNC_SAFE),
84 	PHPDBG_COMMAND_D(info,      "displays some information",               'i', phpdbg_info_commands, "|s", PHPDBG_ASYNC_SAFE),
85 	PHPDBG_COMMAND_D(clean,     "clean the execution environment",          'X', NULL, 0, 0),
86 	PHPDBG_COMMAND_D(clear,     "clear breakpoints",                        'C', NULL, 0, 0),
87 	PHPDBG_COMMAND_D(help,      "show help menu",                           'h', phpdbg_help_commands, "|s", PHPDBG_ASYNC_SAFE),
88 	PHPDBG_COMMAND_D(set,       "set phpdbg configuration",                 'S', phpdbg_set_commands,   "s", PHPDBG_ASYNC_SAFE),
89 	PHPDBG_COMMAND_D(register,  "register a function",                      'R', NULL, "s", 0),
90 	PHPDBG_COMMAND_D(source,    "execute a phpdbginit",                     '<', NULL, "s", 0),
91 	PHPDBG_COMMAND_D(export,    "export breaks to a .phpdbginit script",    '>', NULL, "s", PHPDBG_ASYNC_SAFE),
92 	PHPDBG_COMMAND_D(sh,   	    "shell a command",                           0 , NULL, "i", 0),
93 	PHPDBG_COMMAND_D(quit,      "exit phpdbg",                              'q', NULL, 0, PHPDBG_ASYNC_SAFE),
94 	PHPDBG_COMMAND_D(wait,      "wait for other process",                   'W', NULL, 0, 0),
95 	PHPDBG_COMMAND_D(watch,     "set watchpoint",                           'w', phpdbg_watch_commands, "|ss", 0),
96 	PHPDBG_COMMAND_D(next,      "step over next line",                      'n', NULL, 0, PHPDBG_ASYNC_SAFE),
97 	PHPDBG_COMMAND_D(eol,       "set EOL",                                  'E', NULL, "|s", 0),
98 	PHPDBG_END_COMMAND
99 }; /* }}} */
100 
phpdbg_call_register(phpdbg_param_t *stack)101 static inline int phpdbg_call_register(phpdbg_param_t *stack) /* {{{ */
102 {
103 	phpdbg_param_t *name = NULL;
104 
105 	if (stack->type == STACK_PARAM) {
106 		char *lc_name;
107 
108 		name = stack->next;
109 
110 		if (!name || name->type != STR_PARAM) {
111 			return FAILURE;
112 		}
113 
114 		lc_name = zend_str_tolower_dup(name->str, name->len);
115 
116 		if (zend_hash_str_exists(&PHPDBG_G(registered), lc_name, name->len)) {
117 			zval fretval;
118 			zend_fcall_info fci;
119 
120 			memset(&fci, 0, sizeof(zend_fcall_info));
121 
122 			ZVAL_STRINGL(&fci.function_name, lc_name, name->len);
123 			fci.size = sizeof(zend_fcall_info);
124 			//???fci.symbol_table = zend_rebuild_symbol_table();
125 			fci.object = NULL;
126 			fci.retval = &fretval;
127 			fci.no_separation = 1;
128 
129 			if (name->next) {
130 				zval params;
131 				phpdbg_param_t *next = name->next;
132 
133 				array_init(&params);
134 
135 				while (next) {
136 					char *buffered = NULL;
137 
138 					switch (next->type) {
139 						case OP_PARAM:
140 						case COND_PARAM:
141 						case STR_PARAM:
142 							add_next_index_stringl(&params, next->str, next->len);
143 						break;
144 
145 						case NUMERIC_PARAM:
146 							add_next_index_long(&params, next->num);
147 						break;
148 
149 						case METHOD_PARAM:
150 							spprintf(&buffered, 0, "%s::%s", next->method.class, next->method.name);
151 							add_next_index_string(&params, buffered);
152 						break;
153 
154 						case NUMERIC_METHOD_PARAM:
155 							spprintf(&buffered, 0, "%s::%s#%ld", next->method.class, next->method.name, next->num);
156 							add_next_index_string(&params, buffered);
157 						break;
158 
159 						case NUMERIC_FUNCTION_PARAM:
160 							spprintf(&buffered, 0, "%s#%ld", next->str, next->num);
161 							add_next_index_string(&params, buffered);
162 						break;
163 
164 						case FILE_PARAM:
165 							spprintf(&buffered, 0, "%s:%ld", next->file.name, next->file.line);
166 							add_next_index_string(&params, buffered);
167 						break;
168 
169 						case NUMERIC_FILE_PARAM:
170 							spprintf(&buffered, 0, "%s:#%ld", next->file.name, next->file.line);
171 							add_next_index_string(&params, buffered);
172 						break;
173 
174 						default: {
175 							/* not yet */
176 						}
177 					}
178 
179 					next = next->next;
180 				}
181 
182 				zend_fcall_info_args(&fci, &params);
183 			} else {
184 				fci.params = NULL;
185 				fci.param_count = 0;
186 			}
187 
188 			phpdbg_activate_err_buf(0);
189 			phpdbg_free_err_buf();
190 
191 			phpdbg_debug("created %d params from arguments", fci.param_count);
192 
193 			if (zend_call_function(&fci, NULL) == SUCCESS) {
194 				zend_print_zval_r(&fretval, 0);
195 				phpdbg_out("\n");
196 				zval_ptr_dtor(&fretval);
197 			}
198 
199 			zval_ptr_dtor_str(&fci.function_name);
200 			efree(lc_name);
201 
202 			return SUCCESS;
203 		}
204 
205 		efree(lc_name);
206 	}
207 
208 	return FAILURE;
209 } /* }}} */
210 
211 struct phpdbg_init_state {
212 	int line;
213 	zend_bool in_code;
214 	char *code;
215 	size_t code_len;
216 	const char *init_file;
217 };
218 
phpdbg_line_init(char *cmd, struct phpdbg_init_state *state)219 static void phpdbg_line_init(char *cmd, struct phpdbg_init_state *state) {
220 	size_t cmd_len = strlen(cmd);
221 
222 	state->line++;
223 
224 	while (cmd_len > 0L && isspace(cmd[cmd_len-1])) {
225 		cmd_len--;
226 	}
227 
228 	cmd[cmd_len] = '\0';
229 
230 	if (*cmd && cmd_len > 0L && cmd[0] != '#') {
231 		if (cmd_len == 2) {
232 			if (memcmp(cmd, "<:", sizeof("<:")-1) == SUCCESS) {
233 				state->in_code = 1;
234 				return;
235 			} else {
236 				if (memcmp(cmd, ":>", sizeof(":>")-1) == SUCCESS) {
237 					state->in_code = 0;
238 					state->code[state->code_len] = '\0';
239 					zend_eval_stringl(state->code, state->code_len, NULL, "phpdbginit code");
240 					free(state->code);
241 					state->code = NULL;
242 					return;
243 				}
244 			}
245 		}
246 
247 		if (state->in_code) {
248 			if (state->code == NULL) {
249 				state->code = malloc(cmd_len + 1);
250 			} else {
251 				state->code = realloc(state->code, state->code_len + cmd_len + 1);
252 			}
253 
254 			if (state->code) {
255 				memcpy(&state->code[state->code_len], cmd, cmd_len);
256 				state->code_len += cmd_len;
257 			}
258 
259 			return;
260 		}
261 
262 		zend_try {
263 			char *input = phpdbg_read_input(cmd);
264 			phpdbg_param_t stack;
265 
266 			phpdbg_init_param(&stack, STACK_PARAM);
267 
268 			phpdbg_activate_err_buf(1);
269 
270 			if (phpdbg_do_parse(&stack, input) <= 0) {
271 				switch (phpdbg_stack_execute(&stack, 1 /* allow_async_unsafe == 1 */)) {
272 					case FAILURE:
273 						phpdbg_activate_err_buf(0);
274 						if (phpdbg_call_register(&stack) == FAILURE) {
275 							if (state->init_file) {
276 								phpdbg_output_err_buf("initfailure", "%b file=\"%s\" line=\"%d\" input=\"%s\"", "Unrecognized command in %s:%d: %s, %b!", state->init_file, state->line, input);
277 							} else {
278 								phpdbg_output_err_buf("initfailure", "%b line=\"%d\" input=\"%s\"", "Unrecognized command on line %d: %s, %b!", state->line, input);
279 							}
280 						}
281 					break;
282 				}
283 			}
284 
285 			phpdbg_activate_err_buf(0);
286 			phpdbg_free_err_buf();
287 
288 			phpdbg_stack_free(&stack);
289 			phpdbg_destroy_input(&input);
290 		} zend_catch {
291 			PHPDBG_G(flags) &= ~(PHPDBG_IS_RUNNING | PHPDBG_IS_CLEANING);
292 			if (PHPDBG_G(flags) & PHPDBG_IS_QUITTING) {
293 				zend_bailout();
294 			}
295 		} zend_end_try();
296 	}
297 
298 }
299 
phpdbg_string_init(char *buffer)300 void phpdbg_string_init(char *buffer) {
301 	struct phpdbg_init_state state = {0};
302 	char *str = strtok(buffer, "\n");
303 
304 	while (str) {
305 		phpdbg_line_init(str, &state);
306 
307 		str = strtok(NULL, "\n");
308 	}
309 
310 	if (state.code) {
311 		free(state.code);
312 	}
313 }
314 
phpdbg_try_file_init(char *init_file, size_t init_file_len, zend_bool free_init)315 void phpdbg_try_file_init(char *init_file, size_t init_file_len, zend_bool free_init) /* {{{ */
316 {
317 	zend_stat_t sb;
318 
319 	if (init_file && VCWD_STAT(init_file, &sb) != -1) {
320 		FILE *fp = fopen(init_file, "r");
321 		if (fp) {
322 			char cmd[PHPDBG_MAX_CMD];
323 			struct phpdbg_init_state state = {0};
324 
325 			state.init_file = init_file;
326 
327 			while (fgets(cmd, PHPDBG_MAX_CMD, fp) != NULL) {
328 				phpdbg_line_init(cmd, &state);
329 			}
330 
331 			if (state.code) {
332 				free(state.code);
333 			}
334 
335 			fclose(fp);
336 		} else {
337 			phpdbg_error("initfailure", "type=\"openfile\" file=\"%s\"", "Failed to open %s for initialization", init_file);
338 		}
339 
340 		if (free_init) {
341 			free(init_file);
342 		}
343 	}
344 } /* }}} */
345 
phpdbg_init(char *init_file, size_t init_file_len, zend_bool use_default)346 void phpdbg_init(char *init_file, size_t init_file_len, zend_bool use_default) /* {{{ */
347 {
348 	if (init_file) {
349 		phpdbg_try_file_init(init_file, init_file_len, 1);
350 	} else if (use_default) {
351 		char *scan_dir = getenv("PHP_INI_SCAN_DIR");
352 		char *sys_ini;
353 		int i;
354 
355 		ZEND_IGNORE_VALUE(asprintf(&sys_ini, "%s/" PHPDBG_INIT_FILENAME, PHP_CONFIG_FILE_PATH));
356 		phpdbg_try_file_init(sys_ini, strlen(sys_ini), 0);
357 		free(sys_ini);
358 
359 		if (!scan_dir) {
360 			scan_dir = PHP_CONFIG_FILE_SCAN_DIR;
361 		}
362 		while (*scan_dir != 0) {
363 			i = 0;
364 			while (scan_dir[i] != ':') {
365 				if (scan_dir[i++] == 0) {
366 					i = -1;
367 					break;
368 				}
369 			}
370 			if (i != -1) {
371 				scan_dir[i] = 0;
372 			}
373 
374 			ZEND_IGNORE_VALUE(asprintf(&init_file, "%s/%s", scan_dir, PHPDBG_INIT_FILENAME));
375 			phpdbg_try_file_init(init_file, strlen(init_file), 1);
376 			free(init_file);
377 			if (i == -1) {
378 				break;
379 			}
380 			scan_dir += i + 1;
381 		}
382 
383 		phpdbg_try_file_init(PHPDBG_STRL(PHPDBG_INIT_FILENAME), 0);
384 	}
385 }
386 /* }}} */
387 
phpdbg_clean(zend_bool full, zend_bool resubmit)388 void phpdbg_clean(zend_bool full, zend_bool resubmit) /* {{{ */
389 {
390 	/* this is implicitly required */
391 	if (PHPDBG_G(ops)) {
392 		destroy_op_array(PHPDBG_G(ops));
393 		efree(PHPDBG_G(ops));
394 		PHPDBG_G(ops) = NULL;
395 	}
396 
397 	if (!resubmit && PHPDBG_G(cur_command)) {
398 		free(PHPDBG_G(cur_command));
399 		PHPDBG_G(cur_command) = NULL;
400 	}
401 
402 	if (full) {
403 		PHPDBG_G(flags) |= PHPDBG_IS_CLEANING;
404 	}
405 } /* }}} */
406 
PHPDBG_COMMANDnull407 PHPDBG_COMMAND(exec) /* {{{ */
408 {
409 	zend_stat_t sb;
410 
411 	if (VCWD_STAT(param->str, &sb) != FAILURE) {
412 		if (sb.st_mode & (S_IFREG|S_IFLNK)) {
413 			char *res = phpdbg_resolve_path(param->str);
414 			size_t res_len = strlen(res);
415 
416 			if ((res_len != PHPDBG_G(exec_len)) || (memcmp(res, PHPDBG_G(exec), res_len) != SUCCESS)) {
417 				if (PHPDBG_G(in_execution)) {
418 					if (phpdbg_ask_user_permission("Do you really want to stop execution to set a new execution context?") == FAILURE) {
419 						return FAILURE;
420 					}
421 				}
422 
423 				if (PHPDBG_G(exec)) {
424 					phpdbg_notice("exec", "type=\"unset\" context=\"%s\"", "Unsetting old execution context: %s", PHPDBG_G(exec));
425 					free(PHPDBG_G(exec));
426 					PHPDBG_G(exec) = NULL;
427 					PHPDBG_G(exec_len) = 0L;
428 				}
429 
430 				if (PHPDBG_G(ops)) {
431 					phpdbg_notice("exec", "type=\"unsetops\"", "Destroying compiled opcodes");
432 					phpdbg_clean(0, 0);
433 				}
434 
435 				PHPDBG_G(exec) = res;
436 				PHPDBG_G(exec_len) = res_len;
437 
438 				VCWD_CHDIR_FILE(res);
439 
440 				*SG(request_info).argv = estrndup(PHPDBG_G(exec), PHPDBG_G(exec_len));
441 				php_build_argv(NULL, &PG(http_globals)[TRACK_VARS_SERVER]);
442 
443 				phpdbg_notice("exec", "type=\"set\" context=\"%s\"", "Set execution context: %s", PHPDBG_G(exec));
444 
445 				if (PHPDBG_G(in_execution)) {
446 					phpdbg_clean(1, 0);
447 					return SUCCESS;
448 				}
449 
450 				phpdbg_compile();
451 			} else {
452 				phpdbg_notice("exec", "type=\"unchanged\"", "Execution context not changed");
453 			}
454 		} else {
455 			phpdbg_error("exec", "type=\"invalid\" context=\"%s\"", "Cannot use %s as execution context, not a valid file or symlink", param->str);
456 		}
457 	} else {
458 		phpdbg_error("exec", "type=\"notfound\" context=\"%s\"", "Cannot stat %s, ensure the file exists", param->str);
459 	}
460 	return SUCCESS;
461 } /* }}} */
462 
PHPDBG_COMMANDnull463 PHPDBG_COMMAND(stdin)
464 {
465 	smart_str code = {0};
466 	char *buf;
467 	char *sep = param->str;
468 	int seplen = param->len;
469 	int bytes = 0;
470 
471 	smart_str_appends(&code, "?>");
472 
473 	do {
474 		PHPDBG_G(input_buflen) += bytes;
475 		if (PHPDBG_G(input_buflen) <= 0) {
476 			continue;
477 		}
478 
479 		if (sep && seplen) {
480 			char *nl = buf = PHPDBG_G(input_buffer);
481 			do {
482 				if (buf == nl + seplen) {
483 					if (!memcmp(sep, nl, seplen) && (*buf == '\n' || (*buf == '\r' && buf[1] == '\n'))) {
484 						smart_str_appendl(&code, PHPDBG_G(input_buffer), nl - PHPDBG_G(input_buffer));
485 						memmove(PHPDBG_G(input_buffer), ++buf, --PHPDBG_G(input_buflen));
486 						goto exec_code;
487 					}
488 				}
489 				if (*buf == '\n') {
490 					nl = buf + 1;
491 				}
492 				buf++;
493 			} while (--PHPDBG_G(input_buflen));
494 			if (buf != nl && buf <= nl + seplen) {
495 				smart_str_appendl(&code, PHPDBG_G(input_buffer), nl - PHPDBG_G(input_buffer));
496 				PHPDBG_G(input_buflen) = buf - nl;
497 				memmove(PHPDBG_G(input_buffer), nl, PHPDBG_G(input_buflen));
498 			} else {
499 				PHPDBG_G(input_buflen) = 0;
500 				smart_str_appendl(&code, PHPDBG_G(input_buffer), buf - PHPDBG_G(input_buffer));
501 			}
502 		} else {
503 			smart_str_appendl(&code, PHPDBG_G(input_buffer), PHPDBG_G(input_buflen));
504 			PHPDBG_G(input_buflen) = 0;
505 		}
506 	} while ((bytes = phpdbg_mixed_read(PHPDBG_G(io)[PHPDBG_STDIN].fd, PHPDBG_G(input_buffer) + PHPDBG_G(input_buflen), PHPDBG_MAX_CMD - PHPDBG_G(input_buflen), -1)) > 0);
507 
508 	if (bytes < 0) {
509 		PHPDBG_G(flags) |= PHPDBG_IS_QUITTING | PHPDBG_IS_DISCONNECTED;
510 		zend_bailout();
511 	}
512 
513 exec_code:
514 	smart_str_0(&code);
515 
516 	if (phpdbg_compile_stdin(code.s) == FAILURE) {
517 		zend_exception_error(EG(exception), E_ERROR);
518 		zend_bailout();
519 	}
520 
521 	return SUCCESS;
522 } /* }}} */
523 
phpdbg_compile_stdin(zend_string *code)524 int phpdbg_compile_stdin(zend_string *code) {
525 	zval zv;
526 
527 	ZVAL_STR(&zv, code);
528 
529 	PHPDBG_G(ops) = zend_compile_string(&zv, "Standard input code");
530 
531 	zend_string_release(code);
532 
533 	if (EG(exception)) {
534 		return FAILURE;
535 	}
536 
537 	if (PHPDBG_G(exec)) {
538 		free(PHPDBG_G(exec));
539 	}
540 	PHPDBG_G(exec) = strdup("Standard input code");
541 	PHPDBG_G(exec_len) = sizeof("Standard input code") - 1;
542 	{ /* remove leading ?> from source */
543 		int i;
544 		/* remove trailing data after zero byte, used for avoiding conflicts in eval()'ed code snippets */
545 		zend_string *source_path = strpprintf(0, "Standard input code%c%p", 0, PHPDBG_G(ops)->opcodes);
546 		phpdbg_file_source *data = zend_hash_find_ptr(&PHPDBG_G(file_sources), source_path);
547 		dtor_func_t dtor = PHPDBG_G(file_sources).pDestructor;
548 		PHPDBG_G(file_sources).pDestructor = NULL;
549 		zend_hash_del(&PHPDBG_G(file_sources), source_path);
550 		PHPDBG_G(file_sources).pDestructor = dtor;
551 		zend_hash_str_update_ptr(&PHPDBG_G(file_sources), "Standard input code", sizeof("Standard input code")-1, data);
552 		zend_string_release(source_path);
553 
554 		for (i = 1; i <= data->lines; i++) {
555 			data->line[i] -= 2;
556 		}
557 		data->len -= 2;
558 		memmove(data->buf, data->buf + 2, data->len);
559 	}
560 
561 	phpdbg_notice("compile", "context=\"Standard input code\"", "Successful compilation of stdin input");
562 
563 	return SUCCESS;
564 }
565 
phpdbg_compile(void)566 int phpdbg_compile(void) /* {{{ */
567 {
568 	zend_file_handle fh;
569 	char *buf;
570 	size_t len;
571 
572 	if (!PHPDBG_G(exec)) {
573 		phpdbg_error("inactive", "type=\"nocontext\"", "No execution context");
574 		return FAILURE;
575 	}
576 
577 	if (php_stream_open_for_zend_ex(PHPDBG_G(exec), &fh, USE_PATH|STREAM_OPEN_FOR_INCLUDE) == SUCCESS && zend_stream_fixup(&fh, &buf, &len) == SUCCESS) {
578 		CG(skip_shebang) = 1;
579 		PHPDBG_G(ops) = zend_compile_file(&fh, ZEND_INCLUDE);
580 		zend_destroy_file_handle(&fh);
581 		if (EG(exception)) {
582 			zend_exception_error(EG(exception), E_ERROR);
583 			zend_bailout();
584 		}
585 
586 		phpdbg_notice("compile", "context=\"%s\"", "Successful compilation of %s", PHPDBG_G(exec));
587 
588 		return SUCCESS;
589 	} else {
590 		phpdbg_error("compile", "type=\"openfailure\" context=\"%s\"", "Could not open file %s", PHPDBG_G(exec));
591 	}
592 
593 	return FAILURE;
594 } /* }}} */
595 
PHPDBG_COMMANDnull596 PHPDBG_COMMAND(step) /* {{{ */
597 {
598 	if (PHPDBG_G(in_execution)) {
599 		PHPDBG_G(flags) |= PHPDBG_IS_STEPPING;
600 	}
601 
602 	return PHPDBG_NEXT;
603 } /* }}} */
604 
PHPDBG_COMMANDnull605 PHPDBG_COMMAND(continue) /* {{{ */
606 {
607 	return PHPDBG_NEXT;
608 } /* }}} */
609 
phpdbg_skip_line_helpernull610 int phpdbg_skip_line_helper() /* {{{ */ {
611 	zend_execute_data *ex = phpdbg_user_execute_data(EG(current_execute_data));
612 	const zend_op_array *op_array = &ex->func->op_array;
613 	const zend_op *opline = op_array->opcodes;
614 
615 	PHPDBG_G(flags) |= PHPDBG_IN_UNTIL;
616 	PHPDBG_G(seek_ex) = ex;
617 	do {
618 		if (opline->lineno != ex->opline->lineno
619 		 || opline->opcode == ZEND_RETURN
620 		 || opline->opcode == ZEND_FAST_RET
621 		 || opline->opcode == ZEND_GENERATOR_RETURN
622 		 || opline->opcode == ZEND_EXIT
623 		 || opline->opcode == ZEND_YIELD
624 		 || opline->opcode == ZEND_YIELD_FROM
625 		) {
626 			zend_hash_index_update_ptr(&PHPDBG_G(seek), (zend_ulong) opline, (void *) opline);
627 		}
628 	} while (++opline < op_array->opcodes + op_array->last);
629 
630 	return PHPDBG_UNTIL;
631 }
632 /* }}} */
633 
PHPDBG_COMMANDnull634 PHPDBG_COMMAND(until) /* {{{ */
635 {
636 	if (!PHPDBG_G(in_execution)) {
637 		phpdbg_error("inactive", "type=\"noexec\"", "Not executing");
638 		return SUCCESS;
639 	}
640 
641 	return phpdbg_skip_line_helper();
642 } /* }}} */
643 
PHPDBG_COMMANDnull644 PHPDBG_COMMAND(next) /* {{{ */
645 {
646 	if (!PHPDBG_G(in_execution)) {
647 		phpdbg_error("inactive", "type=\"noexec\"", "Not executing");
648 		return SUCCESS;
649 	}
650 
651 	PHPDBG_G(flags) |= PHPDBG_IS_STEPPING;
652 	return phpdbg_skip_line_helper();
653 } /* }}} */
654 
phpdbg_seek_to_end(void)655 static void phpdbg_seek_to_end(void) /* {{{ */ {
656 	zend_execute_data *ex = phpdbg_user_execute_data(EG(current_execute_data));
657 	const zend_op_array *op_array = &ex->func->op_array;
658 	const zend_op *opline = op_array->opcodes;
659 
660 	PHPDBG_G(seek_ex) = ex;
661 	do {
662 		switch (opline->opcode) {
663 			case ZEND_RETURN:
664 			case ZEND_FAST_RET:
665 			case ZEND_GENERATOR_RETURN:
666 			case ZEND_EXIT:
667 			case ZEND_YIELD:
668 			case ZEND_YIELD_FROM:
669 				zend_hash_index_update_ptr(&PHPDBG_G(seek), (zend_ulong) opline, (void *) opline);
670 		}
671 	} while (++opline < op_array->opcodes + op_array->last);
672 }
673 /* }}} */
674 
PHPDBG_COMMANDnull675 PHPDBG_COMMAND(finish) /* {{{ */
676 {
677 	if (!PHPDBG_G(in_execution)) {
678 		phpdbg_error("inactive", "type=\"noexec\"", "Not executing");
679 		return SUCCESS;
680 	}
681 
682 	phpdbg_seek_to_end();
683 	if (zend_hash_index_exists(&PHPDBG_G(seek), (zend_ulong) phpdbg_user_execute_data(EG(current_execute_data))->opline)) {
684 		zend_hash_clean(&PHPDBG_G(seek));
685 	} else {
686 		PHPDBG_G(flags) |= PHPDBG_IN_FINISH;
687 	}
688 
689 	return PHPDBG_FINISH;
690 } /* }}} */
691 
PHPDBG_COMMANDnull692 PHPDBG_COMMAND(leave) /* {{{ */
693 {
694 	if (!PHPDBG_G(in_execution)) {
695 		phpdbg_error("inactive", "type=\"noexec\"", "Not executing");
696 		return SUCCESS;
697 	}
698 
699 	phpdbg_seek_to_end();
700 	if (zend_hash_index_exists(&PHPDBG_G(seek), (zend_ulong) phpdbg_user_execute_data(EG(current_execute_data))->opline)) {
701 		zend_hash_clean(&PHPDBG_G(seek));
702 		phpdbg_notice("leave", "type=\"end\"", "Already at the end of the function");
703 		return SUCCESS;
704 	} else {
705 		PHPDBG_G(flags) |= PHPDBG_IN_LEAVE;
706 		return PHPDBG_LEAVE;
707 	}
708 } /* }}} */
709 
PHPDBG_COMMANDnull710 PHPDBG_COMMAND(frame) /* {{{ */
711 {
712 	if (!param) {
713 		phpdbg_notice("frame", "id=\"%d\"", "Currently in frame #%d", PHPDBG_G(frame).num);
714 	} else {
715 		phpdbg_switch_frame(param->num);
716 	}
717 
718 	return SUCCESS;
719 } /* }}} */
720 
phpdbg_handle_exception(void)721 static inline void phpdbg_handle_exception(void) /* {{{ */
722 {
723 	zend_object *ex = EG(exception);
724 	zend_string *msg, *file;
725 	zend_long line;
726 	zval zv, rv, tmp;
727 
728 	EG(exception) = NULL;
729 
730 	ZVAL_OBJ(&zv, ex);
731 	zend_call_method_with_0_params(&zv, ex->ce, &ex->ce->__tostring, "__tostring", &tmp);
732 	file = zval_get_string(zend_read_property(zend_get_exception_base(&zv), &zv, ZEND_STRL("file"), 1, &rv));
733 	line = zval_get_long(zend_read_property(zend_get_exception_base(&zv), &zv, ZEND_STRL("line"), 1, &rv));
734 
735 	if (EG(exception)) {
736 		EG(exception) = NULL;
737 		msg = ZSTR_EMPTY_ALLOC();
738 	} else {
739 		zend_update_property_string(zend_get_exception_base(&zv), &zv, ZEND_STRL("string"), Z_STRVAL(tmp));
740 		zval_ptr_dtor(&tmp);
741 		msg = zval_get_string(zend_read_property(zend_get_exception_base(&zv), &zv, ZEND_STRL("string"), 1, &rv));
742 	}
743 
744 	phpdbg_error("exception", "name=\"%s\" file=\"%s\" line=\"" ZEND_LONG_FMT "\"", "Uncaught %s in %s on line " ZEND_LONG_FMT, ZSTR_VAL(ex->ce->name), ZSTR_VAL(file), line);
745 	zend_string_release(file);
746 	phpdbg_writeln("exceptionmsg", "msg=\"%s\"", "%s", ZSTR_VAL(msg));
747 	zend_string_release(msg);
748 
749 	if (EG(prev_exception)) {
750 		OBJ_RELEASE(EG(prev_exception));
751 		EG(prev_exception) = 0;
752 	}
753 	OBJ_RELEASE(ex);
754 	EG(opline_before_exception) = NULL;
755 
756 	EG(exit_status) = 255;
757 } /* }}} */
758 
PHPDBG_COMMANDnull759 PHPDBG_COMMAND(run) /* {{{ */
760 {
761 	if (PHPDBG_G(ops) || PHPDBG_G(exec)) {
762 		zend_execute_data *ex = EG(current_execute_data);
763 		zend_bool restore = 1;
764 
765 		if (PHPDBG_G(in_execution)) {
766 			if (phpdbg_ask_user_permission("Do you really want to restart execution?") == SUCCESS) {
767 				phpdbg_startup_run++;
768 				phpdbg_clean(1, 1);
769 			}
770 			return SUCCESS;
771 		}
772 
773 		if (!PHPDBG_G(ops)) {
774 			if (phpdbg_compile() == FAILURE) {
775 				phpdbg_error("compile", "type=\"compilefailure\" context=\"%s\"", "Failed to compile %s, cannot run", PHPDBG_G(exec));
776 				EG(exit_status) = FAILURE;
777 				goto out;
778 			}
779 		}
780 
781 		if (param && param->type != EMPTY_PARAM && param->len != 0) {
782 			char **argv = emalloc(5 * sizeof(char *));
783 			char *end = param->str + param->len, *p = param->str;
784 			char last_byte;
785 			int argc = 0;
786 			int i;
787 
788 			while (*end == '\r' || *end == '\n') *(end--) = 0;
789 			last_byte = end[1];
790 			end[1] = 0;
791 
792 			while (*p == ' ') p++;
793 			while (*p) {
794 				char sep = ' ';
795 				char *buf = emalloc(end - p + 2), *q = buf;
796 
797 				if (*p == '<') {
798 					/* use as STDIN */
799 					do p++; while (*p == ' ');
800 
801 					if (*p == '\'' || *p == '"') {
802 						sep = *(p++);
803 					}
804 					while (*p && *p != sep) {
805 						if (*p == '\\' && (p[1] == sep || p[1] == '\\')) {
806 							p++;
807 						}
808 						*(q++) = *(p++);
809 					}
810 					*(q++) = 0;
811 					if (*p) {
812 						do p++; while (*p == ' ');
813 					}
814 
815 					if (*p) {
816 						phpdbg_error("cmd", "", "Invalid run command, cannot put further arguments after stdin");
817 						goto free_cmd;
818 					}
819 
820 					PHPDBG_G(stdin_file) = fopen(buf, "r");
821 					if (PHPDBG_G(stdin_file) == NULL) {
822 						phpdbg_error("stdin", "path=\"%s\"", "Could not open '%s' for reading from stdin", buf);
823 						goto free_cmd;
824 					}
825 					efree(buf);
826 					phpdbg_register_file_handles();
827 					break;
828 				}
829 
830 				if (argc >= 4 && argc == (argc & -argc)) {
831 					argv = erealloc(argv, (argc * 2 + 1) * sizeof(char *));
832 				}
833 
834 				if (*p == '\'' || *p == '"') {
835 					sep = *(p++);
836 				}
837 				if (*p == '\\' && (p[1] == '<' || p[1] == '\'' || p[1] == '"')) {
838 					p++;
839 				}
840 				while (*p && *p != sep) {
841 					if (*p == '\\' && (p[1] == sep || p[1] == '\\' || (p[1] == '#' && sep == ' '))) {
842 						p++;
843 					}
844 					*(q++) = *(p++);
845 				}
846 				if (!*p && sep != ' ') {
847 					phpdbg_error("cmd", "", "Invalid run command, unterminated escape sequence");
848 free_cmd:
849 					efree(buf);
850 					for (i = 0; i < argc; i++) {
851 						efree(argv[i]);
852 					}
853 					efree(argv);
854 					end[1] = last_byte;
855 					return SUCCESS;
856 				}
857 
858 				*(q++) = 0;
859 				argv[++argc] = erealloc(buf, q - buf);
860 
861 				if (*p) {
862 					do p++; while (*p == ' ');
863 				}
864 			}
865 			end[1] = last_byte;
866 
867 			argv[0] = SG(request_info).argv[0];
868 			for (i = SG(request_info).argc; --i;) {
869 				efree(SG(request_info).argv[i]);
870 			}
871 			efree(SG(request_info).argv);
872 			SG(request_info).argv = erealloc(argv, ++argc * sizeof(char *));
873 			SG(request_info).argc = argc;
874 
875 			php_build_argv(NULL, &PG(http_globals)[TRACK_VARS_SERVER]);
876 		}
877 
878 		/* clean up from last execution */
879 		if (ex && (ZEND_CALL_INFO(ex) & ZEND_CALL_HAS_SYMBOL_TABLE)) {
880 			zend_hash_clean(ex->symbol_table);
881 		} else {
882 			zend_rebuild_symbol_table();
883 		}
884 		PHPDBG_G(handled_exception) = NULL;
885 
886 		/* clean seek state */
887 		PHPDBG_G(flags) &= ~PHPDBG_SEEK_MASK;
888 		zend_hash_clean(&PHPDBG_G(seek));
889 
890 		/* reset hit counters */
891 		phpdbg_reset_breakpoints();
892 
893 		zend_try {
894 			PHPDBG_G(flags) ^= PHPDBG_IS_INTERACTIVE;
895 			PHPDBG_G(flags) |= PHPDBG_IS_RUNNING;
896 			zend_execute(PHPDBG_G(ops), &PHPDBG_G(retval));
897 			PHPDBG_G(flags) ^= PHPDBG_IS_INTERACTIVE;
898 		} zend_catch {
899 			PHPDBG_G(in_execution) = 0;
900 
901 			if (!(PHPDBG_G(flags) & PHPDBG_IS_STOPPING)) {
902 				restore = 0;
903 			} else {
904 				zend_bailout();
905 			}
906 		} zend_end_try();
907 
908 		if (PHPDBG_G(socket_fd) != -1) {
909 			close(PHPDBG_G(socket_fd));
910 			PHPDBG_G(socket_fd) = -1;
911 		}
912 
913 		if (restore) {
914 			zend_exception_restore();
915 			zend_try {
916 				zend_try_exception_handler();
917 				PHPDBG_G(in_execution) = 1;
918 			} zend_catch {
919 				PHPDBG_G(in_execution) = 0;
920 
921 				if (PHPDBG_G(flags) & PHPDBG_IS_STOPPING) {
922 					zend_bailout();
923 				}
924 			} zend_end_try();
925 
926 			if (EG(exception)) {
927 				phpdbg_handle_exception();
928 			}
929 		}
930 
931 		PHPDBG_G(flags) &= ~PHPDBG_IS_RUNNING;
932 
933 		phpdbg_clean(1, 0);
934 	} else {
935 		phpdbg_error("inactive", "type=\"nocontext\"", "Nothing to execute!");
936 	}
937 
938 out:
939 	PHPDBG_FRAME(num) = 0;
940 	return SUCCESS;
941 } /* }}} */
942 
phpdbg_output_ev_variable(char *name, size_t len, char *keyname, size_t keylen, HashTable *parent, zval *zv)943 int phpdbg_output_ev_variable(char *name, size_t len, char *keyname, size_t keylen, HashTable *parent, zval *zv) /* {{{ */ {
944 	phpdbg_notice("eval", "variable=\"%.*s\"", "Printing variable %.*s", (int) len, name);
945 	phpdbg_xml("<eval %r>");
946 	zend_print_zval_r(zv, 0);
947 	phpdbg_xml("</eval>");
948 	phpdbg_out("\n");
949 
950 	efree(name);
951 	efree(keyname);
952 
953 	return SUCCESS;
954 }
955 /* }}} */
956 
PHPDBG_COMMANDnull957 PHPDBG_COMMAND(ev) /* {{{ */
958 {
959 	zend_bool stepping = ((PHPDBG_G(flags) & PHPDBG_IS_STEPPING) == PHPDBG_IS_STEPPING);
960 	zval retval;
961 
962 	zend_execute_data *original_execute_data = EG(current_execute_data);
963 	zend_vm_stack original_stack = EG(vm_stack);
964 	zend_object *ex = NULL;
965 
966 	PHPDBG_OUTPUT_BACKUP();
967 
968 	original_stack->top = EG(vm_stack_top);
969 
970 	if (PHPDBG_G(flags) & PHPDBG_IN_SIGNAL_HANDLER) {
971 		phpdbg_try_access {
972 			phpdbg_parse_variable(param->str, param->len, &EG(symbol_table), 0, phpdbg_output_ev_variable, 0);
973 		} phpdbg_catch_access {
974 			phpdbg_error("signalsegv", "", "Could not fetch data, invalid data source");
975 		} phpdbg_end_try_access();
976 
977 		PHPDBG_OUTPUT_BACKUP_RESTORE();
978 		return SUCCESS;
979 	}
980 
981 	if (!(PHPDBG_G(flags) & PHPDBG_IS_STEPONEVAL)) {
982 		PHPDBG_G(flags) &= ~PHPDBG_IS_STEPPING;
983 	}
984 
985 	/* disable stepping while eval() in progress */
986 	PHPDBG_G(flags) |= PHPDBG_IN_EVAL;
987 	zend_try {
988 		if (zend_eval_stringl(param->str, param->len, &retval, "eval()'d code") == SUCCESS) {
989 			if (EG(exception)) {
990 				ex = EG(exception);
991 				zend_exception_error(EG(exception), E_ERROR);
992 			} else {
993 				phpdbg_xml("<eval %r>");
994 				if (PHPDBG_G(flags) & PHPDBG_WRITE_XML) {
995 					zval *zvp = &retval;
996 					phpdbg_xml_var_dump(zvp);
997 				}
998 				zend_print_zval_r(&retval, 0);
999 				phpdbg_xml("</eval>");
1000 				phpdbg_out("\n");
1001 				zval_ptr_dtor(&retval);
1002 			}
1003 		}
1004 	} zend_catch {
1005 		PHPDBG_G(unclean_eval) = 1;
1006 		if (ex) {
1007 			OBJ_RELEASE(ex);
1008 		}
1009 		EG(current_execute_data) = original_execute_data;
1010 		EG(vm_stack_top) = original_stack->top;
1011 		EG(vm_stack_end) = original_stack->end;
1012 		EG(vm_stack) = original_stack;
1013 		EG(exit_status) = 0;
1014 	} zend_end_try();
1015 
1016 	PHPDBG_G(flags) &= ~PHPDBG_IN_EVAL;
1017 
1018 	/* switch stepping back on */
1019 	if (stepping && !(PHPDBG_G(flags) & PHPDBG_IS_STEPONEVAL)) {
1020 		PHPDBG_G(flags) |= PHPDBG_IS_STEPPING;
1021 	}
1022 
1023 	CG(unclean_shutdown) = 0;
1024 
1025 	PHPDBG_OUTPUT_BACKUP_RESTORE();
1026 
1027 	return SUCCESS;
1028 } /* }}} */
1029 
PHPDBG_COMMANDnull1030 PHPDBG_COMMAND(back) /* {{{ */
1031 {
1032 	if (!PHPDBG_G(in_execution)) {
1033 		phpdbg_error("inactive", "type=\"noexec\"", "Not executing!");
1034 		return SUCCESS;
1035 	}
1036 
1037 	if (!param) {
1038 		phpdbg_dump_backtrace(0);
1039 	} else {
1040 		phpdbg_dump_backtrace(param->num);
1041 	}
1042 
1043 	return SUCCESS;
1044 } /* }}} */
1045 
PHPDBG_COMMANDnull1046 PHPDBG_COMMAND(generator) /* {{{ */
1047 {
1048 	int i;
1049 
1050 	if (!PHPDBG_G(in_execution)) {
1051 		phpdbg_error("inactive", "type=\"noexec\"", "Not executing!");
1052 		return SUCCESS;
1053 	}
1054 
1055 	if (param) {
1056 		i = param->num;
1057 		zend_object **obj = EG(objects_store).object_buckets + i;
1058 		if (i < EG(objects_store).top && *obj && IS_OBJ_VALID(*obj) && (*obj)->ce == zend_ce_generator) {
1059 			zend_generator *gen = (zend_generator *) *obj;
1060 			if (gen->execute_data) {
1061 				if (zend_generator_get_current(gen)->flags & ZEND_GENERATOR_CURRENTLY_RUNNING) {
1062 					phpdbg_error("generator", "type=\"running\"", "Generator currently running");
1063 				} else {
1064 					phpdbg_open_generator_frame(gen);
1065 				}
1066 			} else {
1067 				phpdbg_error("generator", "type=\"closed\"", "Generator already closed");
1068 			}
1069 		} else {
1070 			phpdbg_error("invalidarg", "", "Invalid object handle");
1071 		}
1072 	} else {
1073 		for (i = 0; i < EG(objects_store).top; i++) {
1074 			zend_object *obj = EG(objects_store).object_buckets[i];
1075 			if (obj && IS_OBJ_VALID(obj) && obj->ce == zend_ce_generator) {
1076 				zend_generator *gen = (zend_generator *) obj, *current = zend_generator_get_current(gen);
1077 				if (gen->execute_data) {
1078 					zend_string *s = phpdbg_compile_stackframe(gen->execute_data);
1079 					phpdbg_out("#%d: %.*s", i, (int) ZSTR_LEN(s), ZSTR_VAL(s));
1080 					zend_string_release(s);
1081 					if (gen != current) {
1082 						if (gen->node.parent != current) {
1083 							phpdbg_out(" with direct parent #%d and", gen->node.parent->std.handle);
1084 						}
1085 						phpdbg_out(" executing #%d currently", current->std.handle);
1086 					}
1087 					phpdbg_out("\n");
1088 				}
1089 			}
1090 		}
1091 	}
1092 
1093 	return SUCCESS;
1094 } /* }}} */
1095 
PHPDBG_COMMANDnull1096 PHPDBG_COMMAND(print) /* {{{ */
1097 {
1098 	if (!param || param->type == EMPTY_PARAM) {
1099 		return phpdbg_do_print_stack(param);
1100 	} else switch (param->type) {
1101 		case STR_PARAM:
1102 			return phpdbg_do_print_func(param);
1103 		case METHOD_PARAM:
1104 			return phpdbg_do_print_method(param);
1105 		default:
1106 			phpdbg_error("print", "type=\"invalidarg\"", "Invalid arguments to print, expected nothing, function name or method name");
1107 			return SUCCESS;
1108 	}
1109 } /* }}} */
1110 
PHPDBG_COMMANDnull1111 PHPDBG_COMMAND(info) /* {{{ */
1112 {
1113 	phpdbg_out("Execution Context Information\n\n");
1114 	phpdbg_xml("<printinfo %r>");
1115 #ifdef HAVE_PHPDBG_READLINE
1116 # ifdef HAVE_LIBREADLINE
1117 	 phpdbg_writeln("info", "readline=\"yes\"", "Readline   yes");
1118 # else
1119 	 phpdbg_writeln("info", "readline=\"no\"", "Readline   no");
1120 # endif
1121 # ifdef HAVE_LIBEDIT
1122 	 phpdbg_writeln("info", "libedit=\"yes\"", "Libedit    yes");
1123 # else
1124 	 phpdbg_writeln("info", "libedit=\"no\"", "Libedit    no");
1125 # endif
1126 #else
1127      phpdbg_writeln("info", "readline=\"unavailable\"", "Readline   unavailable");
1128 #endif
1129 
1130 	phpdbg_writeln("info", "context=\"%s\"", "Exec       %s", PHPDBG_G(exec) ? PHPDBG_G(exec) : "none");
1131 	phpdbg_writeln("info", "compiled=\"%s\"", "Compiled   %s", PHPDBG_G(ops) ? "yes" : "no");
1132 	phpdbg_writeln("info", "stepping=\"%s\"", "Stepping   %s", (PHPDBG_G(flags) & PHPDBG_IS_STEPPING) ? "on" : "off");
1133 	phpdbg_writeln("info", "quiet=\"%s\"", "Quietness  %s", (PHPDBG_G(flags) & PHPDBG_IS_QUIET) ? "on" : "off");
1134 	phpdbg_writeln("info", "oplog=\"%s\"", "Oplog      %s", PHPDBG_G(oplog) ? "on" : "off");
1135 
1136 	if (PHPDBG_G(ops)) {
1137 		phpdbg_writeln("info", "ops=\"%d\"", "Opcodes    %d", PHPDBG_G(ops)->last);
1138 		phpdbg_writeln("info", "vars=\"%d\"", "Variables  %d", PHPDBG_G(ops)->last_var ? PHPDBG_G(ops)->last_var - 1 : 0);
1139 	}
1140 
1141 	phpdbg_writeln("info", "executing=\"%d\"", "Executing  %s", PHPDBG_G(in_execution) ? "yes" : "no");
1142 	if (PHPDBG_G(in_execution)) {
1143 		phpdbg_writeln("info", "vmret=\"%d\"", "VM Return  %d", PHPDBG_G(vmret));
1144 	}
1145 
1146 	phpdbg_writeln("info", "classes=\"%d\"", "Classes    %d", zend_hash_num_elements(EG(class_table)));
1147 	phpdbg_writeln("info", "functions=\"%d\"", "Functions  %d", zend_hash_num_elements(EG(function_table)));
1148 	phpdbg_writeln("info", "constants=\"%d\"", "Constants  %d", zend_hash_num_elements(EG(zend_constants)));
1149 	phpdbg_writeln("info", "includes=\"%d\"", "Included   %d", zend_hash_num_elements(&EG(included_files)));
1150 	phpdbg_xml("</printinfo>");
1151 
1152 	return SUCCESS;
1153 } /* }}} */
1154 
PHPDBG_COMMANDnull1155 PHPDBG_COMMAND(set) /* {{{ */
1156 {
1157 	phpdbg_error("set", "type=\"toofewargs\" expected=\"1\"", "No set command selected!");
1158 
1159 	return SUCCESS;
1160 } /* }}} */
1161 
PHPDBG_COMMANDnull1162 PHPDBG_COMMAND(break) /* {{{ */
1163 {
1164 	if (!param) {
1165 		if (PHPDBG_G(exec)) {
1166 			phpdbg_set_breakpoint_file(
1167 				zend_get_executed_filename(),
1168 				strlen(zend_get_executed_filename()),
1169 				zend_get_executed_lineno());
1170 		} else {
1171 			phpdbg_error("inactive", "type=\"noexec\"", "Execution context not set!");
1172 		}
1173 	} else switch (param->type) {
1174 		case ADDR_PARAM:
1175 			phpdbg_set_breakpoint_opline(param->addr);
1176 			break;
1177 		case NUMERIC_PARAM:
1178 			if (PHPDBG_G(exec)) {
1179 				phpdbg_set_breakpoint_file(phpdbg_current_file(), strlen(phpdbg_current_file()), param->num);
1180 			} else {
1181 				phpdbg_error("inactive", "type=\"noexec\"", "Execution context not set!");
1182 			}
1183 			break;
1184 		case METHOD_PARAM:
1185 			phpdbg_set_breakpoint_method(param->method.class, param->method.name);
1186 			break;
1187 		case NUMERIC_METHOD_PARAM:
1188 			phpdbg_set_breakpoint_method_opline(param->method.class, param->method.name, param->num);
1189 			break;
1190 		case NUMERIC_FUNCTION_PARAM:
1191 			phpdbg_set_breakpoint_function_opline(param->str, param->num);
1192 			break;
1193 		case FILE_PARAM:
1194 			phpdbg_set_breakpoint_file(param->file.name, 0, param->file.line);
1195 			break;
1196 		case NUMERIC_FILE_PARAM:
1197 			phpdbg_set_breakpoint_file_opline(param->file.name, param->file.line);
1198 			break;
1199 		case COND_PARAM:
1200 			phpdbg_set_breakpoint_expression(param->str, param->len);
1201 			break;
1202 		case STR_PARAM:
1203 			phpdbg_set_breakpoint_symbol(param->str, param->len);
1204 			break;
1205 		case OP_PARAM:
1206 			phpdbg_set_breakpoint_opcode(param->str, param->len);
1207 			break;
1208 
1209 		phpdbg_default_switch_case();
1210 	}
1211 
1212 	return SUCCESS;
1213 } /* }}} */
1214 
PHPDBG_COMMANDnull1215 PHPDBG_COMMAND(sh) /* {{{ */
1216 {
1217 	FILE *fd = NULL;
1218 	if ((fd=VCWD_POPEN((char*)param->str, "w"))) {
1219 		/* TODO: do something perhaps ?? do we want input ?? */
1220 		pclose(fd);
1221 	} else {
1222 		phpdbg_error("sh", "type=\"failure\" smd=\"%s\"", "Failed to execute %s", param->str);
1223 	}
1224 
1225 	return SUCCESS;
1226 } /* }}} */
1227 
add_module_info(zend_module_entry *module)1228 static int add_module_info(zend_module_entry *module) /* {{{ */ {
1229 	phpdbg_write("module", "name=\"%s\"", "%s\n", module->name);
1230 	return 0;
1231 }
1232 /* }}} */
1233 
add_zendext_info(zend_extension *ext)1234 static int add_zendext_info(zend_extension *ext) /* {{{ */ {
1235 	phpdbg_write("extension", "name=\"%s\"", "%s\n", ext->name);
1236 	return 0;
1237 }
1238 /* }}} */
1239 
1240 #ifdef HAVE_LIBDL
phpdbg_load_module_or_extension(char **path, char **name)1241 PHPDBG_API const char *phpdbg_load_module_or_extension(char **path, char **name) /* {{{ */ {
1242 	DL_HANDLE handle;
1243 	char *extension_dir;
1244 
1245 	extension_dir = INI_STR("extension_dir");
1246 
1247 	if (strchr(*path, '/') != NULL || strchr(*path, DEFAULT_SLASH) != NULL) {
1248 		/* path is fine */
1249 	} else if (extension_dir && extension_dir[0]) {
1250 		char *libpath;
1251 		int extension_dir_len = strlen(extension_dir);
1252 		if (IS_SLASH(extension_dir[extension_dir_len-1])) {
1253 			spprintf(&libpath, 0, "%s%s", extension_dir, *path); /* SAFE */
1254 		} else {
1255 			spprintf(&libpath, 0, "%s%c%s", extension_dir, DEFAULT_SLASH, *path); /* SAFE */
1256 		}
1257 		efree(*path);
1258 		*path = libpath;
1259 	} else {
1260 		phpdbg_error("dl", "type=\"relpath\"", "Not a full path given or extension_dir ini setting is not set");
1261 
1262 		return NULL;
1263 	}
1264 
1265 	handle = DL_LOAD(*path);
1266 
1267 	if (!handle) {
1268 #ifdef PHP_WIN32
1269 		char *err = GET_DL_ERROR();
1270 		if (err && err[0]) {
1271 			phpdbg_error("dl", "type=\"unknown\"", "%s", err);
1272 			php_win32_error_msg_free(err);
1273 		} else {
1274 			phpdbg_error("dl", "type=\"unknown\"", "Unknown reason");
1275 		}
1276 #else
1277 		phpdbg_error("dl", "type=\"unknown\"", "%s", GET_DL_ERROR());
1278 #endif
1279 		return NULL;
1280 	}
1281 
1282 #if ZEND_EXTENSIONS_SUPPORT
1283 	do {
1284 		zend_extension *new_extension;
1285 		zend_extension_version_info *extension_version_info;
1286 
1287 		extension_version_info = (zend_extension_version_info *) DL_FETCH_SYMBOL(handle, "extension_version_info");
1288 		if (!extension_version_info) {
1289 			extension_version_info = (zend_extension_version_info *) DL_FETCH_SYMBOL(handle, "_extension_version_info");
1290 		}
1291 		new_extension = (zend_extension *) DL_FETCH_SYMBOL(handle, "zend_extension_entry");
1292 		if (!new_extension) {
1293 			new_extension = (zend_extension *) DL_FETCH_SYMBOL(handle, "_zend_extension_entry");
1294 		}
1295 		if (!extension_version_info || !new_extension) {
1296 			break;
1297 		}
1298 		if (extension_version_info->zend_extension_api_no != ZEND_EXTENSION_API_NO &&(!new_extension->api_no_check || new_extension->api_no_check(ZEND_EXTENSION_API_NO) != SUCCESS)) {
1299 			phpdbg_error("dl", "type=\"wrongapi\" extension=\"%s\" apineeded=\"%d\" apiinstalled=\"%d\"", "%s requires Zend Engine API version %d, which does not match the installed Zend Engine API version %d", new_extension->name, extension_version_info->zend_extension_api_no, ZEND_EXTENSION_API_NO);
1300 
1301 			goto quit;
1302 		} else if (strcmp(ZEND_EXTENSION_BUILD_ID, extension_version_info->build_id) && (!new_extension->build_id_check || new_extension->build_id_check(ZEND_EXTENSION_BUILD_ID) != SUCCESS)) {
1303 			phpdbg_error("dl", "type=\"wrongbuild\" extension=\"%s\" buildneeded=\"%s\" buildinstalled=\"%s\"", "%s was built with configuration %s, whereas running engine is %s", new_extension->name, extension_version_info->build_id, ZEND_EXTENSION_BUILD_ID);
1304 
1305 			goto quit;
1306 		}
1307 
1308 		*name = new_extension->name;
1309 
1310 		zend_register_extension(new_extension, handle);
1311 
1312 		if (new_extension->startup) {
1313 			if (new_extension->startup(new_extension) != SUCCESS) {
1314 				phpdbg_error("dl", "type=\"startupfailure\" extension=\"%s\"", "Unable to startup Zend extension %s", new_extension->name);
1315 
1316 				goto quit;
1317 			}
1318 			zend_append_version_info(new_extension);
1319 		}
1320 
1321 		return "Zend extension";
1322 	} while (0);
1323 #endif
1324 
1325 	do {
1326 		zend_module_entry *module_entry;
1327 		zend_module_entry *(*get_module)(void);
1328 
1329 		get_module = (zend_module_entry *(*)(void)) DL_FETCH_SYMBOL(handle, "get_module");
1330 		if (!get_module) {
1331 			get_module = (zend_module_entry *(*)(void)) DL_FETCH_SYMBOL(handle, "_get_module");
1332 		}
1333 
1334 		if (!get_module) {
1335 			break;
1336 		}
1337 
1338 		module_entry = get_module();
1339 		*name = (char *) module_entry->name;
1340 
1341 		if (strcmp(ZEND_EXTENSION_BUILD_ID, module_entry->build_id)) {
1342 			phpdbg_error("dl", "type=\"wrongbuild\" module=\"%s\" buildneeded=\"%s\" buildinstalled=\"%s\"",  "%s was built with configuration %s, whereas running engine is %s", module_entry->name, module_entry->build_id, ZEND_EXTENSION_BUILD_ID);
1343 
1344 			goto quit;
1345 		}
1346 
1347 		module_entry->type = MODULE_PERSISTENT;
1348 		module_entry->module_number = zend_next_free_module();
1349 		module_entry->handle = handle;
1350 
1351 		if ((module_entry = zend_register_module_ex(module_entry)) == NULL) {
1352 			phpdbg_error("dl", "type=\"registerfailure\" module=\"%s\"", "Unable to register module %s", module_entry->name);
1353 
1354 			goto quit;
1355 		}
1356 
1357 		if (zend_startup_module_ex(module_entry) == FAILURE) {
1358 			phpdbg_error("dl", "type=\"startupfailure\" module=\"%s\"", "Unable to startup module %s", module_entry->name);
1359 
1360 			goto quit;
1361 		}
1362 
1363 		if (module_entry->request_startup_func) {
1364 			if (module_entry->request_startup_func(MODULE_PERSISTENT, module_entry->module_number) == FAILURE) {
1365 				phpdbg_error("dl", "type=\"initfailure\" module=\"%s\"", "Unable to initialize module %s", module_entry->name);
1366 
1367 				goto quit;
1368 			}
1369 		}
1370 
1371 		return "module";
1372 	} while (0);
1373 
1374 	phpdbg_error("dl", "type=\"nophpso\"", "This shared object is nor a Zend extension nor a module");
1375 
1376 quit:
1377 	DL_UNLOAD(handle);
1378 	return NULL;
1379 }
1380 /* }}} */
1381 #endif
1382 
PHPDBG_COMMANDnull1383 PHPDBG_COMMAND(dl) /* {{{ */
1384 {
1385 	const char *type;
1386 	char *name, *path;
1387 
1388 	if (!param || param->type == EMPTY_PARAM) {
1389 		phpdbg_notice("dl", "extensiontype=\"Zend extension\"", "Zend extensions");
1390 		zend_llist_apply(&zend_extensions, (llist_apply_func_t) add_zendext_info);
1391 		phpdbg_out("\n");
1392 		phpdbg_notice("dl", "extensiontype=\"module\"", "Modules");
1393 		zend_hash_apply(&module_registry, (apply_func_t) add_module_info);
1394 	} else switch (param->type) {
1395 		case STR_PARAM:
1396 #ifdef HAVE_LIBDL
1397 			path = estrndup(param->str, param->len);
1398 
1399 			phpdbg_activate_err_buf(1);
1400 			if ((type = phpdbg_load_module_or_extension(&path, &name)) == NULL) {
1401 				phpdbg_error("dl", "path=\"%s\" %b", "Could not load %s, not found or invalid zend extension / module: %b", path);
1402 				efree(name);
1403 			} else {
1404 				phpdbg_notice("dl", "extensiontype=\"%s\" name=\"%s\" path=\"%s\"", "Successfully loaded the %s %s at path %s", type, name, path);
1405 			}
1406 			phpdbg_activate_err_buf(0);
1407 			phpdbg_free_err_buf();
1408 			efree(path);
1409 #else
1410 			phpdbg_error("dl", "type=\"unsupported\" path=\"%.*s\"", "Cannot dynamically load %.*s - dynamic modules are not supported", (int) param->len, param->str);
1411 #endif
1412 			break;
1413 
1414 		phpdbg_default_switch_case();
1415 	}
1416 
1417 	return SUCCESS;
1418 } /* }}} */
1419 
PHPDBG_COMMANDnull1420 PHPDBG_COMMAND(source) /* {{{ */
1421 {
1422 	zend_stat_t sb;
1423 
1424 	if (VCWD_STAT(param->str, &sb) != -1) {
1425 		phpdbg_try_file_init(param->str, param->len, 0);
1426 	} else {
1427 		phpdbg_error("source", "type=\"notfound\" file=\"%s\"", "Failed to stat %s, file does not exist", param->str);
1428 	}
1429 
1430 	return SUCCESS;
1431 } /* }}} */
1432 
PHPDBG_COMMANDnull1433 PHPDBG_COMMAND(export) /* {{{ */
1434 {
1435 	FILE *handle = VCWD_FOPEN(param->str, "w+");
1436 
1437 	if (handle) {
1438 		phpdbg_export_breakpoints(handle);
1439 		fclose(handle);
1440 	} else {
1441 		phpdbg_error("export", "type=\"openfailure\" file=\"%s\"", "Failed to open or create %s, check path and permissions", param->str);
1442 	}
1443 
1444 	return SUCCESS;
1445 } /* }}} */
1446 
PHPDBG_COMMAND(register)1447 PHPDBG_COMMAND(register) /* {{{ */
1448 {
1449 	zend_function *function;
1450 	char *lcname = zend_str_tolower_dup(param->str, param->len);
1451 	size_t lcname_len = strlen(lcname);
1452 
1453 	if (!zend_hash_str_exists(&PHPDBG_G(registered), lcname, lcname_len)) {
1454 		if ((function = zend_hash_str_find_ptr(EG(function_table), lcname, lcname_len))) {
1455 			zend_hash_str_update_ptr(&PHPDBG_G(registered), lcname, lcname_len, function);
1456 			function_add_ref(function);
1457 
1458 			phpdbg_notice("register", "function=\"%s\"", "Registered %s", lcname);
1459 		} else {
1460 			phpdbg_error("register", "type=\"notfound\" function=\"%s\"", "The requested function (%s) could not be found", param->str);
1461 		}
1462 	} else {
1463 		phpdbg_error("register", "type=\"inuse\" function=\"%s\"", "The requested name (%s) is already in use", lcname);
1464 	}
1465 
1466 	efree(lcname);
1467 	return SUCCESS;
1468 } /* }}} */
1469 
PHPDBG_COMMANDnull1470 PHPDBG_COMMAND(quit) /* {{{ */
1471 {
1472 	PHPDBG_G(flags) |= PHPDBG_IS_QUITTING;
1473 	PHPDBG_G(flags) &= ~PHPDBG_IS_CLEANING;
1474 
1475 	return SUCCESS;
1476 } /* }}} */
1477 
PHPDBG_COMMANDnull1478 PHPDBG_COMMAND(clean) /* {{{ */
1479 {
1480 	if (PHPDBG_G(in_execution)) {
1481 		if (phpdbg_ask_user_permission("Do you really want to clean your current environment?") == FAILURE) {
1482 			return SUCCESS;
1483 		}
1484 	}
1485 
1486 	phpdbg_out("Cleaning Execution Environment\n");
1487 	phpdbg_xml("<cleaninfo %r>");
1488 
1489 	phpdbg_writeln("clean", "classes=\"%d\"", "Classes    %d", zend_hash_num_elements(EG(class_table)));
1490 	phpdbg_writeln("clean", "functions=\"%d\"", "Functions  %d", zend_hash_num_elements(EG(function_table)));
1491 	phpdbg_writeln("clean", "constants=\"%d\"", "Constants  %d", zend_hash_num_elements(EG(zend_constants)));
1492 	phpdbg_writeln("clean", "includes=\"%d\"", "Includes   %d", zend_hash_num_elements(&EG(included_files)));
1493 
1494 	phpdbg_clean(1, 0);
1495 
1496 	phpdbg_xml("</cleaninfo>");
1497 
1498 	return SUCCESS;
1499 } /* }}} */
1500 
PHPDBG_COMMANDnull1501 PHPDBG_COMMAND(clear) /* {{{ */
1502 {
1503 	phpdbg_out("Clearing Breakpoints\n");
1504 	phpdbg_xml("<clearinfo %r>");
1505 
1506 	phpdbg_writeln("clear", "files=\"%d\"", "File              %d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE]));
1507 	phpdbg_writeln("clear", "functions=\"%d\"", "Functions         %d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_SYM]));
1508 	phpdbg_writeln("clear", "methods=\"%d\"", "Methods           %d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_METHOD]));
1509 	phpdbg_writeln("clear", "oplines=\"%d\"", "Oplines           %d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_OPLINE]));
1510 	phpdbg_writeln("clear", "fileoplines=\"%d\"", "File oplines      %d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE_OPLINE]));
1511 	phpdbg_writeln("clear", "functionoplines=\"%d\"", "Function oplines  %d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_FUNCTION_OPLINE]));
1512 	phpdbg_writeln("clear", "methodoplines=\"%d\"", "Method oplines    %d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_METHOD_OPLINE]));
1513 	phpdbg_writeln("clear", "eval=\"%d\"", "Conditionals      %d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_COND]));
1514 
1515 	phpdbg_clear_breakpoints();
1516 
1517 	phpdbg_xml("</clearinfo>");
1518 
1519 	return SUCCESS;
1520 } /* }}} */
1521 
PHPDBG_COMMANDnull1522 PHPDBG_COMMAND(list) /* {{{ */
1523 {
1524 	if (!param) {
1525 		return PHPDBG_LIST_HANDLER(lines)(PHPDBG_COMMAND_ARGS);
1526 	} else switch (param->type) {
1527 		case NUMERIC_PARAM:
1528 			return PHPDBG_LIST_HANDLER(lines)(PHPDBG_COMMAND_ARGS);
1529 
1530 		case FILE_PARAM:
1531 			return PHPDBG_LIST_HANDLER(lines)(PHPDBG_COMMAND_ARGS);
1532 
1533 		case STR_PARAM:
1534 			phpdbg_list_function_byname(param->str, param->len);
1535 			break;
1536 
1537 		case METHOD_PARAM:
1538 			return PHPDBG_LIST_HANDLER(method)(PHPDBG_COMMAND_ARGS);
1539 
1540 		phpdbg_default_switch_case();
1541 	}
1542 
1543 	return SUCCESS;
1544 } /* }}} */
1545 
PHPDBG_COMMANDnull1546 PHPDBG_COMMAND(watch) /* {{{ */
1547 {
1548 	if (!param || param->type == EMPTY_PARAM) {
1549 		phpdbg_list_watchpoints();
1550 	} else switch (param->type) {
1551 		case STR_PARAM:
1552 			phpdbg_create_var_watchpoint(param->str, param->len);
1553 			break;
1554 
1555 		phpdbg_default_switch_case();
1556 	}
1557 
1558 	return SUCCESS;
1559 } /* }}} */
1560 
phpdbg_interactive(zend_bool allow_async_unsafe, char *input)1561 int phpdbg_interactive(zend_bool allow_async_unsafe, char *input) /* {{{ */
1562 {
1563 	int ret = SUCCESS;
1564 	phpdbg_param_t stack;
1565 
1566 	PHPDBG_G(flags) |= PHPDBG_IS_INTERACTIVE;
1567 
1568 	while (ret == SUCCESS || ret == FAILURE) {
1569 		if (PHPDBG_G(flags) & PHPDBG_IS_STOPPING) {
1570 			zend_bailout();
1571 		}
1572 
1573 		if (!input && !(input = phpdbg_read_input(NULL))) {
1574 			break;
1575 		}
1576 
1577 
1578 		phpdbg_init_param(&stack, STACK_PARAM);
1579 
1580 		if (phpdbg_do_parse(&stack, input) <= 0) {
1581 			phpdbg_activate_err_buf(1);
1582 
1583 #ifdef PHP_WIN32
1584 #define PARA ((phpdbg_param_t *)stack.next)->type
1585 			if (PHPDBG_G(flags) & PHPDBG_IS_REMOTE && (RUN_PARAM == PARA || EVAL_PARAM == PARA)) {
1586 				sigio_watcher_start();
1587 			}
1588 #endif
1589 			zend_try {
1590 				ret = phpdbg_stack_execute(&stack, allow_async_unsafe);
1591 			} zend_catch {
1592 				phpdbg_stack_free(&stack);
1593 				zend_bailout();
1594 			} zend_end_try();
1595 
1596 			switch (ret) {
1597 				case FAILURE:
1598 					if (!(PHPDBG_G(flags) & PHPDBG_IS_STOPPING)) {
1599 						if (!allow_async_unsafe || phpdbg_call_register(&stack) == FAILURE) {
1600 							phpdbg_output_err_buf(NULL, "%b", "%b");
1601 						}
1602 					}
1603 				break;
1604 
1605 				case PHPDBG_LEAVE:
1606 				case PHPDBG_FINISH:
1607 				case PHPDBG_UNTIL:
1608 				case PHPDBG_NEXT: {
1609 					phpdbg_activate_err_buf(0);
1610 					phpdbg_free_err_buf();
1611 					if (!PHPDBG_G(in_execution) && !(PHPDBG_G(flags) & PHPDBG_IS_STOPPING)) {
1612 						phpdbg_error("command", "type=\"noexec\"", "Not running");
1613 					}
1614 					break;
1615 				}
1616 			}
1617 
1618 			phpdbg_activate_err_buf(0);
1619 			phpdbg_free_err_buf();
1620 #ifdef PHP_WIN32
1621 			if (PHPDBG_G(flags) & PHPDBG_IS_REMOTE && (RUN_PARAM == PARA || EVAL_PARAM == PARA)) {
1622 				sigio_watcher_stop();
1623 			}
1624 #undef PARA
1625 #endif
1626 		}
1627 
1628 		phpdbg_stack_free(&stack);
1629 		phpdbg_destroy_input(&input);
1630 		PHPDBG_G(req_id) = 0;
1631 		input = NULL;
1632 	}
1633 
1634 	if (input) {
1635 		phpdbg_stack_free(&stack);
1636 		phpdbg_destroy_input(&input);
1637 		PHPDBG_G(req_id) = 0;
1638 	}
1639 
1640 	if (PHPDBG_G(in_execution)) {
1641 		phpdbg_restore_frame();
1642 	}
1643 
1644 	PHPDBG_G(flags) &= ~PHPDBG_IS_INTERACTIVE;
1645 
1646 	phpdbg_print_changed_zvals();
1647 
1648 	return ret;
1649 } /* }}} */
1650 
list_codenull1651 static inline void list_code() {
1652 	if (!(PHPDBG_G(flags) & PHPDBG_IN_EVAL)) {
1653 		const char *file_char = zend_get_executed_filename();
1654 		zend_string *file = zend_string_init(file_char, strlen(file_char), 0);
1655 		phpdbg_list_file(file, 3, zend_get_executed_lineno()-1, zend_get_executed_lineno());
1656 		efree(file);
1657 	}
1658 }
1659 
1660 /* code may behave weirdly if EG(exception) is set; thus backup it */
1661 #define DO_INTERACTIVE(allow_async_unsafe) do { \
1662 	if (exception) { \
1663 		const zend_op *before_ex = EG(opline_before_exception); \
1664 		const zend_op *backup_opline = NULL; \
1665 		if (EG(current_execute_data) && EG(current_execute_data)->func && ZEND_USER_CODE(EG(current_execute_data)->func->common.type)) { \
1666 			backup_opline = EG(current_execute_data)->opline; \
1667 		} \
1668 		GC_ADDREF(exception); \
1669 		zend_clear_exception(); \
1670 		list_code(); \
1671 		switch (phpdbg_interactive(allow_async_unsafe, NULL)) { \
1672 			zval zv; \
1673 			case PHPDBG_LEAVE: \
1674 			case PHPDBG_FINISH: \
1675 			case PHPDBG_UNTIL: \
1676 			case PHPDBG_NEXT: \
1677 				if (backup_opline \
1678 				 && (backup_opline->opcode == ZEND_HANDLE_EXCEPTION || backup_opline->opcode == ZEND_CATCH)) { \
1679 					EG(current_execute_data)->opline = backup_opline; \
1680 					EG(exception) = exception; \
1681 				} else { \
1682 					Z_OBJ(zv) = exception; \
1683 					zend_throw_exception_internal(&zv); \
1684 				} \
1685 				EG(opline_before_exception) = before_ex; \
1686 		} \
1687 	} else { \
1688 		list_code(); \
1689 		phpdbg_interactive(allow_async_unsafe, NULL); \
1690 	} \
1691 	goto next; \
1692 } while (0)
1693 
phpdbg_execute_ex(zend_execute_data *execute_data)1694 void phpdbg_execute_ex(zend_execute_data *execute_data) /* {{{ */
1695 {
1696 	zend_bool original_in_execution = PHPDBG_G(in_execution);
1697 
1698 	if ((PHPDBG_G(flags) & PHPDBG_IS_STOPPING) && !(PHPDBG_G(flags) & PHPDBG_IS_RUNNING)) {
1699 		zend_bailout();
1700 	}
1701 
1702 	PHPDBG_G(in_execution) = 1;
1703 
1704 	while (1) {
1705 		zend_object *exception = EG(exception);
1706 
1707 		if ((PHPDBG_G(flags) & PHPDBG_BP_RESOLVE_MASK)) {
1708 			/* resolve nth opline breakpoints */
1709 			phpdbg_resolve_op_array_breaks(&execute_data->func->op_array);
1710 		}
1711 
1712 #ifdef ZEND_WIN32
1713 		if (EG(timed_out)) {
1714 			zend_timeout(0);
1715 		}
1716 #endif
1717 
1718 		if (PHPDBG_G(flags) & PHPDBG_PREVENT_INTERACTIVE) {
1719 			phpdbg_print_opline_ex(execute_data, 0);
1720 			goto next;
1721 		}
1722 
1723 		/* check for uncaught exceptions */
1724 		if (exception && PHPDBG_G(handled_exception) != exception && !(PHPDBG_G(flags) & PHPDBG_IN_EVAL)) {
1725 			zend_execute_data *prev_ex = execute_data;
1726 			zval zv, rv;
1727 			zend_string *file, *msg;
1728 			zend_long line;
1729 
1730 			do {
1731 				prev_ex = zend_generator_check_placeholder_frame(prev_ex);
1732 				/* assuming that no internal functions will silently swallow exceptions ... */
1733 				if (!prev_ex->func || !ZEND_USER_CODE(prev_ex->func->common.type)) {
1734 					continue;
1735 				}
1736 
1737 				if (phpdbg_check_caught_ex(prev_ex, exception)) {
1738 					goto ex_is_caught;
1739 				}
1740 			} while ((prev_ex = prev_ex->prev_execute_data));
1741 
1742 			PHPDBG_G(handled_exception) = exception;
1743 
1744 			ZVAL_OBJ(&zv, exception);
1745 			file = zval_get_string(zend_read_property(zend_get_exception_base(&zv), &zv, ZEND_STRL("file"), 1, &rv));
1746 			line = zval_get_long(zend_read_property(zend_get_exception_base(&zv), &zv, ZEND_STRL("line"), 1, &rv));
1747 			msg = zval_get_string(zend_read_property(zend_get_exception_base(&zv), &zv, ZEND_STRL("message"), 1, &rv));
1748 
1749 			phpdbg_error("exception",
1750 				"name=\"%s\" file=\"%s\" line=\"" ZEND_LONG_FMT "\"",
1751 				"Uncaught %s in %s on line " ZEND_LONG_FMT ": %.*s",
1752 				ZSTR_VAL(exception->ce->name), ZSTR_VAL(file), line,
1753 				ZSTR_LEN(msg) < 80 ? (int) ZSTR_LEN(msg) : 80, ZSTR_VAL(msg));
1754 			zend_string_release(msg);
1755 			zend_string_release(file);
1756 
1757 			DO_INTERACTIVE(1);
1758 		}
1759 ex_is_caught:
1760 
1761 		/* allow conditional breakpoints and initialization to access the vm uninterrupted */
1762 		if (PHPDBG_G(flags) & (PHPDBG_IN_COND_BP | PHPDBG_IS_INITIALIZING)) {
1763 			/* skip possible breakpoints */
1764 			goto next;
1765 		}
1766 
1767 		/* not while in conditionals */
1768 		phpdbg_print_opline_ex(execute_data, 0);
1769 
1770 		/* perform seek operation */
1771 		if ((PHPDBG_G(flags) & PHPDBG_SEEK_MASK) && !(PHPDBG_G(flags) & PHPDBG_IN_EVAL)) {
1772 			/* current address */
1773 			zend_ulong address = (zend_ulong) execute_data->opline;
1774 
1775 			if (PHPDBG_G(seek_ex) != execute_data) {
1776 				if (PHPDBG_G(flags) & PHPDBG_IS_STEPPING) {
1777 					goto stepping;
1778 				}
1779 				goto next;
1780 			}
1781 
1782 #define INDEX_EXISTS_CHECK (zend_hash_index_exists(&PHPDBG_G(seek), address) || (exception && phpdbg_check_caught_ex(execute_data, exception) == 0))
1783 
1784 			/* run to next line */
1785 			if (PHPDBG_G(flags) & PHPDBG_IN_UNTIL) {
1786 				if (INDEX_EXISTS_CHECK) {
1787 					PHPDBG_G(flags) &= ~PHPDBG_IN_UNTIL;
1788 					zend_hash_clean(&PHPDBG_G(seek));
1789 				} else {
1790 					/* skip possible breakpoints */
1791 					goto next;
1792 				}
1793 			}
1794 
1795 			/* run to finish */
1796 			if (PHPDBG_G(flags) & PHPDBG_IN_FINISH) {
1797 				if (INDEX_EXISTS_CHECK) {
1798 					PHPDBG_G(flags) &= ~PHPDBG_IN_FINISH;
1799 					zend_hash_clean(&PHPDBG_G(seek));
1800 				}
1801 				/* skip possible breakpoints */
1802 				goto next;
1803 			}
1804 
1805 			/* break for leave */
1806 			if (PHPDBG_G(flags) & PHPDBG_IN_LEAVE) {
1807 				if (INDEX_EXISTS_CHECK) {
1808 					PHPDBG_G(flags) &= ~PHPDBG_IN_LEAVE;
1809 					zend_hash_clean(&PHPDBG_G(seek));
1810 					phpdbg_notice("breakpoint", "id=\"leave\" file=\"%s\" line=\"%u\"", "Breaking for leave at %s:%u",
1811 						zend_get_executed_filename(),
1812 						zend_get_executed_lineno()
1813 					);
1814 					DO_INTERACTIVE(1);
1815 				} else {
1816 					/* skip possible breakpoints */
1817 					goto next;
1818 				}
1819 			}
1820 		}
1821 
1822 		if (PHPDBG_G(flags) & PHPDBG_IS_STEPPING && (PHPDBG_G(flags) & PHPDBG_STEP_OPCODE || execute_data->opline->lineno != PHPDBG_G(last_line))) {
1823 stepping:
1824 			PHPDBG_G(flags) &= ~PHPDBG_IS_STEPPING;
1825 			DO_INTERACTIVE(1);
1826 		}
1827 
1828 		/* check if some watchpoint was hit */
1829 		{
1830 			if (phpdbg_print_changed_zvals() == SUCCESS) {
1831 				DO_INTERACTIVE(1);
1832 			}
1833 		}
1834 
1835 		/* search for breakpoints */
1836 		{
1837 			phpdbg_breakbase_t *brake;
1838 
1839 			if ((PHPDBG_G(flags) & PHPDBG_BP_MASK)
1840 			    && (brake = phpdbg_find_breakpoint(execute_data))
1841 			    && (brake->type != PHPDBG_BREAK_FILE || execute_data->opline->lineno != PHPDBG_G(last_line))) {
1842 				phpdbg_hit_breakpoint(brake, 1);
1843 				DO_INTERACTIVE(1);
1844 			}
1845 		}
1846 
1847 		if (PHPDBG_G(flags) & PHPDBG_IS_SIGNALED) {
1848 			PHPDBG_G(flags) &= ~PHPDBG_IS_SIGNALED;
1849 
1850 			phpdbg_out("\n");
1851 			phpdbg_notice("signal", "type=\"SIGINT\"", "Program received signal SIGINT");
1852 			DO_INTERACTIVE(1);
1853 		}
1854 
1855 next:
1856 
1857 		PHPDBG_G(last_line) = execute_data->opline->lineno;
1858 
1859 		/* stupid hack to make zend_do_fcall_common_helper return ZEND_VM_ENTER() instead of recursively calling zend_execute() and eventually segfaulting */
1860 		if ((execute_data->opline->opcode == ZEND_DO_FCALL ||
1861 		     execute_data->opline->opcode == ZEND_DO_UCALL ||
1862 		     execute_data->opline->opcode == ZEND_DO_FCALL_BY_NAME) &&
1863 		     execute_data->call->func->type == ZEND_USER_FUNCTION) {
1864 			zend_execute_ex = execute_ex;
1865 		}
1866 		PHPDBG_G(vmret) = zend_vm_call_opcode_handler(execute_data);
1867 		zend_execute_ex = phpdbg_execute_ex;
1868 
1869 		if (PHPDBG_G(vmret) != 0) {
1870 			if (PHPDBG_G(vmret) < 0) {
1871 				PHPDBG_G(in_execution) = original_in_execution;
1872 				return;
1873 			} else {
1874 				execute_data = EG(current_execute_data);
1875 			}
1876 		}
1877 	}
1878 	zend_error_noreturn(E_ERROR, "Arrived at end of main loop which shouldn't happen");
1879 } /* }}} */
1880 
1881 /* only if *not* interactive and while executing */
phpdbg_force_interruption(void)1882 void phpdbg_force_interruption(void) /* {{{ */ {
1883 	zend_object *exception = EG(exception);
1884 	zend_execute_data *data = EG(current_execute_data); /* should be always readable if not NULL */
1885 
1886 	PHPDBG_G(flags) |= PHPDBG_IN_SIGNAL_HANDLER;
1887 
1888 	if (data) {
1889 		if (data->func) {
1890 			if (ZEND_USER_CODE(data->func->type)) {
1891 				phpdbg_notice("hardinterrupt", "opline=\"%p\" num=\"%lu\" file=\"%s\" line=\"%u\"", "Current opline: %p (op #%lu) in %s:%u", data->opline, (data->opline - data->func->op_array.opcodes) / sizeof(data->opline), data->func->op_array.filename->val, data->opline->lineno);
1892 			} else if (data->func->internal_function.function_name) {
1893 				phpdbg_notice("hardinterrupt", "func=\"%s\"", "Current opline: in internal function %s", data->func->internal_function.function_name->val);
1894 			} else {
1895 				phpdbg_notice("hardinterrupt", "", "Current opline: executing internal code");
1896 			}
1897 		} else {
1898 			phpdbg_notice("hardinterrupt", "opline=\"%p\"", "Current opline: %p (op_array information unavailable)", data->opline);
1899 		}
1900 	} else {
1901 		phpdbg_notice("hardinterrupt", "", "No information available about executing context");
1902 	}
1903 
1904 	DO_INTERACTIVE(0);
1905 
1906 next:
1907 	PHPDBG_G(flags) &= ~PHPDBG_IN_SIGNAL_HANDLER;
1908 
1909 	if (PHPDBG_G(flags) & PHPDBG_IS_STOPPING) {
1910 		zend_bailout();
1911 	}
1912 }
1913 /* }}} */
1914 
PHPDBG_COMMANDnull1915 PHPDBG_COMMAND(eol) /* {{{ */
1916 {
1917 	if (!param || param->type == EMPTY_PARAM) {
1918 		phpdbg_notice("eol", "argument required", "argument required");
1919 	} else switch (param->type) {
1920 		case STR_PARAM:
1921 			if (FAILURE == phpdbg_eol_global_update(param->str)) {
1922 				phpdbg_notice("eol", "unknown EOL name '%s', give crlf, lf, cr", "unknown EOL name '%s', give  crlf, lf, cr", param->str);
1923 			}
1924 			break;
1925 
1926 		phpdbg_default_switch_case();
1927 	}
1928 
1929 	return SUCCESS;
1930 } /* }}} */
1931