1 /*
2 +----------------------------------------------------------------------+
3 | Copyright (c) The PHP Group |
4 +----------------------------------------------------------------------+
5 | This source file is subject to version 3.01 of the PHP license, |
6 | that is bundled with this package in the file LICENSE, and is |
7 | available through the world-wide-web at the following url: |
8 | https://www.php.net/license/3_01.txt |
9 | If you did not receive a copy of the PHP license and are unable to |
10 | obtain it through the world-wide-web, please send a note to |
11 | license@php.net so we can mail you a copy immediately. |
12 +----------------------------------------------------------------------+
13 | Authors: Felipe Pena <felipe@php.net> |
14 | Authors: Joe Watkins <joe.watkins@live.co.uk> |
15 | Authors: Bob Weinand <bwoebi@php.net> |
16 +----------------------------------------------------------------------+
17 */
18
19 #include <stdio.h>
20 #include <string.h>
21 #include "zend.h"
22 #include "zend_compile.h"
23 #include "zend_exceptions.h"
24 #include "zend_vm.h"
25 #include "zend_generators.h"
26 #include "zend_interfaces.h"
27 #include "zend_smart_str.h"
28 #include "phpdbg.h"
29 #include "phpdbg_io.h"
30
31 #include "phpdbg_help.h"
32 #include "phpdbg_print.h"
33 #include "phpdbg_info.h"
34 #include "phpdbg_break.h"
35 #include "phpdbg_list.h"
36 #include "phpdbg_utils.h"
37 #include "phpdbg_prompt.h"
38 #include "phpdbg_cmd.h"
39 #include "phpdbg_set.h"
40 #include "phpdbg_frame.h"
41 #include "phpdbg_lexer.h"
42 #include "phpdbg_parser.h"
43
44 #if ZEND_VM_KIND != ZEND_VM_KIND_CALL && ZEND_VM_KIND != ZEND_VM_KIND_HYBRID
45 #error "phpdbg can only be built with CALL zend vm kind"
46 #endif
47
48 ZEND_EXTERN_MODULE_GLOBALS(phpdbg)
49 extern int phpdbg_startup_run;
50
51 #ifdef HAVE_LIBDL
52 #ifdef PHP_WIN32
53 #include "win32/param.h"
54 #include "win32/winutil.h"
55 #define GET_DL_ERROR() php_win_err()
56 #else
57 #include <sys/param.h>
58 #define GET_DL_ERROR() DL_ERROR()
59 #endif
60 #endif
61
62 /* {{{ command declarations */
63 const phpdbg_command_t phpdbg_prompt_commands[] = {
64 PHPDBG_COMMAND_D(exec, "set execution context", 'e', NULL, "s", 0),
65 PHPDBG_COMMAND_D(stdin, "read script from stdin", 0 , NULL, "s", 0),
66 PHPDBG_COMMAND_D(step, "step through execution", 's', NULL, 0, PHPDBG_ASYNC_SAFE),
67 PHPDBG_COMMAND_D(continue, "continue execution", 'c', NULL, 0, PHPDBG_ASYNC_SAFE),
68 PHPDBG_COMMAND_D(run, "attempt execution", 'r', NULL, "|s", 0),
69 PHPDBG_COMMAND_D(ev, "evaluate some code", 0 , NULL, "i", PHPDBG_ASYNC_SAFE), /* restricted ASYNC_SAFE */
70 PHPDBG_COMMAND_D(until, "continue past the current line", 'u', NULL, 0, 0),
71 PHPDBG_COMMAND_D(finish, "continue past the end of the stack", 'F', NULL, 0, 0),
72 PHPDBG_COMMAND_D(leave, "continue until the end of the stack", 'L', NULL, 0, 0),
73 PHPDBG_COMMAND_D(generator, "inspect or switch to a generator", 'g', NULL, "|n", 0),
74 PHPDBG_COMMAND_D(print, "print something", 'p', phpdbg_print_commands, "|*c", 0),
75 PHPDBG_COMMAND_D(break, "set breakpoint", 'b', phpdbg_break_commands, "|*c", 0),
76 PHPDBG_COMMAND_D(back, "show trace", 't', NULL, "|n", PHPDBG_ASYNC_SAFE),
77 PHPDBG_COMMAND_D(frame, "switch to a frame", 'f', NULL, "|n", PHPDBG_ASYNC_SAFE),
78 PHPDBG_COMMAND_D(list, "lists some code", 'l', phpdbg_list_commands, "*", PHPDBG_ASYNC_SAFE),
79 PHPDBG_COMMAND_D(info, "displays some information", 'i', phpdbg_info_commands, "|s", PHPDBG_ASYNC_SAFE),
80 PHPDBG_COMMAND_D(clean, "clean the execution environment", 'X', NULL, 0, 0),
81 PHPDBG_COMMAND_D(clear, "clear breakpoints", 'C', NULL, 0, 0),
82 PHPDBG_COMMAND_D(help, "show help menu", 'h', phpdbg_help_commands, "|s", PHPDBG_ASYNC_SAFE),
83 PHPDBG_COMMAND_D(set, "set phpdbg configuration", 'S', phpdbg_set_commands, "s", PHPDBG_ASYNC_SAFE),
84 PHPDBG_COMMAND_D(register, "register a function", 'R', NULL, "s", 0),
85 PHPDBG_COMMAND_D(source, "execute a phpdbginit", '<', NULL, "s", 0),
86 PHPDBG_COMMAND_D(export, "export breaks to a .phpdbginit script", '>', NULL, "s", PHPDBG_ASYNC_SAFE),
87 PHPDBG_COMMAND_D(sh, "shell a command", 0 , NULL, "i", 0),
88 PHPDBG_COMMAND_D(quit, "exit phpdbg", 'q', NULL, 0, PHPDBG_ASYNC_SAFE),
89 PHPDBG_COMMAND_D(watch, "set watchpoint", 'w', phpdbg_watch_commands, "|ss", 0),
90 PHPDBG_COMMAND_D(next, "step over next line", 'n', NULL, 0, PHPDBG_ASYNC_SAFE),
91 PHPDBG_END_COMMAND
92 }; /* }}} */
93
phpdbg_call_register(phpdbg_param_t * stack)94 static inline int phpdbg_call_register(phpdbg_param_t *stack) /* {{{ */
95 {
96 phpdbg_param_t *name = NULL;
97
98 if (stack->type == STACK_PARAM) {
99 char *lc_name;
100
101 name = stack->next;
102
103 if (!name || name->type != STR_PARAM) {
104 return FAILURE;
105 }
106
107 lc_name = zend_str_tolower_dup(name->str, name->len);
108
109 if (zend_hash_str_exists(&PHPDBG_G(registered), lc_name, name->len)) {
110 zval fretval;
111 zend_fcall_info fci;
112
113 memset(&fci, 0, sizeof(zend_fcall_info));
114
115 ZVAL_STRINGL(&fci.function_name, lc_name, name->len);
116 fci.size = sizeof(zend_fcall_info);
117 fci.object = NULL;
118 fci.retval = &fretval;
119 fci.param_count = 0;
120 fci.params = NULL;
121 fci.named_params = NULL;
122
123 zval params;
124 if (name->next) {
125 phpdbg_param_t *next = name->next;
126
127 array_init(¶ms);
128
129 while (next) {
130 char *buffered = NULL;
131
132 switch (next->type) {
133 case OP_PARAM:
134 case COND_PARAM:
135 case STR_PARAM:
136 add_next_index_stringl(¶ms, next->str, next->len);
137 break;
138
139 case NUMERIC_PARAM:
140 add_next_index_long(¶ms, next->num);
141 break;
142
143 case METHOD_PARAM:
144 spprintf(&buffered, 0, "%s::%s", next->method.class, next->method.name);
145 add_next_index_string(¶ms, buffered);
146 break;
147
148 case NUMERIC_METHOD_PARAM:
149 spprintf(&buffered, 0, "%s::%s#"ZEND_LONG_FMT, next->method.class, next->method.name, next->num);
150 add_next_index_string(¶ms, buffered);
151 break;
152
153 case NUMERIC_FUNCTION_PARAM:
154 spprintf(&buffered, 0, "%s#"ZEND_LONG_FMT, next->str, next->num);
155 add_next_index_string(¶ms, buffered);
156 break;
157
158 case FILE_PARAM:
159 spprintf(&buffered, 0, "%s:"ZEND_ULONG_FMT, next->file.name, next->file.line);
160 add_next_index_string(¶ms, buffered);
161 break;
162
163 case NUMERIC_FILE_PARAM:
164 spprintf(&buffered, 0, "%s:#"ZEND_ULONG_FMT, next->file.name, next->file.line);
165 add_next_index_string(¶ms, buffered);
166 break;
167
168 default: {
169 /* not yet */
170 }
171 }
172
173 next = next->next;
174 }
175 /* Add positional arguments */
176 fci.named_params = Z_ARRVAL(params);
177 }
178
179 phpdbg_activate_err_buf(0);
180 phpdbg_free_err_buf();
181
182 phpdbg_debug("created %d params from arguments", fci.param_count);
183
184 if (zend_call_function(&fci, NULL) == SUCCESS) {
185 zend_print_zval_r(&fretval, 0);
186 phpdbg_out("\n");
187 zval_ptr_dtor(&fretval);
188 }
189
190 zval_ptr_dtor_str(&fci.function_name);
191 efree(lc_name);
192
193 return SUCCESS;
194 }
195
196 efree(lc_name);
197 }
198
199 return FAILURE;
200 } /* }}} */
201
202 struct phpdbg_init_state {
203 int line;
204 bool in_code;
205 char *code;
206 size_t code_len;
207 const char *init_file;
208 };
209
phpdbg_line_init(char * cmd,struct phpdbg_init_state * state)210 static void phpdbg_line_init(char *cmd, struct phpdbg_init_state *state) {
211 size_t cmd_len = strlen(cmd);
212
213 state->line++;
214
215 while (cmd_len > 0L && isspace(cmd[cmd_len-1])) {
216 cmd_len--;
217 }
218
219 cmd[cmd_len] = '\0';
220
221 if (*cmd && cmd_len > 0L && cmd[0] != '#') {
222 if (cmd_len == 2) {
223 if (memcmp(cmd, "<:", sizeof("<:")-1) == SUCCESS) {
224 state->in_code = 1;
225 return;
226 } else {
227 if (memcmp(cmd, ":>", sizeof(":>")-1) == SUCCESS) {
228 state->in_code = 0;
229 state->code[state->code_len] = '\0';
230 zend_eval_stringl(state->code, state->code_len, NULL, "phpdbginit code");
231 free(state->code);
232 state->code = NULL;
233 return;
234 }
235 }
236 }
237
238 if (state->in_code) {
239 if (state->code == NULL) {
240 state->code = malloc(cmd_len + 1);
241 } else {
242 state->code = realloc(state->code, state->code_len + cmd_len + 1);
243 }
244
245 if (state->code) {
246 memcpy(&state->code[state->code_len], cmd, cmd_len);
247 state->code_len += cmd_len;
248 }
249
250 return;
251 }
252
253 zend_try {
254 char *input = phpdbg_read_input(cmd);
255 phpdbg_param_t stack;
256
257 phpdbg_init_param(&stack, STACK_PARAM);
258
259 phpdbg_activate_err_buf(1);
260
261 if (phpdbg_do_parse(&stack, input) <= 0) {
262 switch (phpdbg_stack_execute(&stack, 1 /* allow_async_unsafe == 1 */)) {
263 case FAILURE:
264 phpdbg_activate_err_buf(0);
265 if (phpdbg_call_register(&stack) == FAILURE) {
266 if (state->init_file) {
267 phpdbg_output_err_buf("Unrecognized command in %s:%d: %s, %s!", state->init_file, state->line, input, PHPDBG_G(err_buf).msg);
268 } else {
269 phpdbg_output_err_buf("Unrecognized command on line %d: %s, %s!", state->line, input, PHPDBG_G(err_buf).msg);
270 }
271 }
272 break;
273 }
274 }
275
276 phpdbg_activate_err_buf(0);
277 phpdbg_free_err_buf();
278
279 phpdbg_stack_free(&stack);
280 phpdbg_destroy_input(&input);
281 } zend_catch {
282 PHPDBG_G(flags) &= ~(PHPDBG_IS_RUNNING | PHPDBG_IS_CLEANING);
283 if (PHPDBG_G(flags) & PHPDBG_IS_QUITTING) {
284 zend_bailout();
285 }
286 } zend_end_try();
287 }
288
289 }
290
phpdbg_string_init(char * buffer)291 void phpdbg_string_init(char *buffer) {
292 struct phpdbg_init_state state = {0};
293 char *str = strtok(buffer, "\n");
294
295 while (str) {
296 phpdbg_line_init(str, &state);
297
298 str = strtok(NULL, "\n");
299 }
300
301 if (state.code) {
302 free(state.code);
303 }
304 }
305
phpdbg_try_file_init(char * init_file,size_t init_file_len,bool free_init)306 void phpdbg_try_file_init(char *init_file, size_t init_file_len, bool free_init) /* {{{ */
307 {
308 zend_stat_t sb = {0};
309
310 if (init_file && VCWD_STAT(init_file, &sb) != -1) {
311 FILE *fp = fopen(init_file, "r");
312 if (fp) {
313 char cmd[PHPDBG_MAX_CMD];
314 struct phpdbg_init_state state = {0};
315
316 state.init_file = init_file;
317
318 while (fgets(cmd, PHPDBG_MAX_CMD, fp) != NULL) {
319 phpdbg_line_init(cmd, &state);
320 }
321
322 if (state.code) {
323 free(state.code);
324 }
325
326 fclose(fp);
327 } else {
328 phpdbg_error("Failed to open %s for initialization", init_file);
329 }
330
331 if (free_init) {
332 free(init_file);
333 }
334 }
335 } /* }}} */
336
phpdbg_init(char * init_file,size_t init_file_len,bool use_default)337 void phpdbg_init(char *init_file, size_t init_file_len, bool use_default) /* {{{ */
338 {
339 if (init_file) {
340 phpdbg_try_file_init(init_file, init_file_len, 1);
341 } else if (use_default) {
342 char *scan_dir = getenv("PHP_INI_SCAN_DIR");
343 char *sys_ini;
344 int i;
345
346 size_t sys_ini_length = asprintf(&sys_ini, "%s/" PHPDBG_INIT_FILENAME, PHP_CONFIG_FILE_PATH);
347 phpdbg_try_file_init(sys_ini, sys_ini_length, 0);
348 free(sys_ini);
349
350 if (!scan_dir) {
351 scan_dir = PHP_CONFIG_FILE_SCAN_DIR;
352 }
353 while (*scan_dir != 0) {
354 i = 0;
355 while (scan_dir[i] != ':') {
356 if (scan_dir[i++] == 0) {
357 i = -1;
358 break;
359 }
360 }
361 if (i != -1) {
362 scan_dir[i] = 0;
363 }
364
365 ZEND_IGNORE_VALUE(asprintf(&init_file, "%s/%s", scan_dir, PHPDBG_INIT_FILENAME));
366 phpdbg_try_file_init(init_file, init_file_len, 0);
367 free(init_file);
368 if (i == -1) {
369 break;
370 }
371 scan_dir += i + 1;
372 }
373
374 phpdbg_try_file_init(PHPDBG_STRL(PHPDBG_INIT_FILENAME), 0);
375 }
376 }
377 /* }}} */
378
phpdbg_clean(bool full,bool resubmit)379 void phpdbg_clean(bool full, bool resubmit) /* {{{ */
380 {
381 /* this is implicitly required */
382 if (PHPDBG_G(ops)) {
383 destroy_op_array(PHPDBG_G(ops));
384 efree(PHPDBG_G(ops));
385 PHPDBG_G(ops) = NULL;
386 }
387
388 if (!resubmit && PHPDBG_G(cur_command)) {
389 free(PHPDBG_G(cur_command));
390 PHPDBG_G(cur_command) = NULL;
391 }
392
393 if (full) {
394 PHPDBG_G(flags) |= PHPDBG_IS_CLEANING;
395 }
396 } /* }}} */
397
PHPDBG_COMMAND(exec)398 PHPDBG_COMMAND(exec) /* {{{ */
399 {
400 zend_stat_t sb = {0};
401
402 if (VCWD_STAT(param->str, &sb) != FAILURE) {
403 if (sb.st_mode & (S_IFREG|S_IFLNK)) {
404 char *res = phpdbg_resolve_path(param->str);
405 size_t res_len = strlen(res);
406
407 if ((res_len != PHPDBG_G(exec_len)) || (memcmp(res, PHPDBG_G(exec), res_len) != SUCCESS)) {
408 if (PHPDBG_G(in_execution)) {
409 if (phpdbg_ask_user_permission("Do you really want to stop execution to set a new execution context?") == FAILURE) {
410 free(res);
411 return FAILURE;
412 }
413 }
414
415 if (PHPDBG_G(exec)) {
416 phpdbg_notice("Unsetting old execution context: %s", PHPDBG_G(exec));
417 free(PHPDBG_G(exec));
418 PHPDBG_G(exec) = NULL;
419 PHPDBG_G(exec_len) = 0L;
420 }
421
422 if (PHPDBG_G(ops)) {
423 phpdbg_notice("Destroying compiled opcodes");
424 phpdbg_clean(0, 0);
425 }
426
427 PHPDBG_G(exec) = res;
428 PHPDBG_G(exec_len) = res_len;
429
430 VCWD_CHDIR_FILE(res);
431
432 *SG(request_info).argv = estrndup(PHPDBG_G(exec), PHPDBG_G(exec_len));
433 php_build_argv(NULL, &PG(http_globals)[TRACK_VARS_SERVER]);
434
435 phpdbg_notice("Set execution context: %s", PHPDBG_G(exec));
436
437 if (PHPDBG_G(in_execution)) {
438 phpdbg_clean(1, 0);
439 return SUCCESS;
440 }
441
442 phpdbg_compile();
443 } else {
444 free(res);
445 phpdbg_notice("Execution context not changed");
446 }
447 } else {
448 phpdbg_error("Cannot use %s as execution context, not a valid file or symlink", param->str);
449 }
450 } else {
451 phpdbg_error("Cannot stat %s, ensure the file exists", param->str);
452 }
453 return SUCCESS;
454 } /* }}} */
455
PHPDBG_COMMAND(stdin)456 PHPDBG_COMMAND(stdin)
457 {
458 smart_str code = {0};
459 char *buf;
460 char *sep = param->str;
461 int seplen = param->len;
462 int bytes = 0;
463
464 smart_str_appends(&code, "?>");
465
466 do {
467 PHPDBG_G(input_buflen) += bytes;
468 if (PHPDBG_G(input_buflen) <= 0) {
469 continue;
470 }
471
472 if (sep && seplen) {
473 char *nl = buf = PHPDBG_G(input_buffer);
474 do {
475 if (buf == nl + seplen) {
476 if (!memcmp(sep, nl, seplen) && (*buf == '\n' || (*buf == '\r' && buf[1] == '\n'))) {
477 smart_str_appendl(&code, PHPDBG_G(input_buffer), nl - PHPDBG_G(input_buffer));
478 memmove(PHPDBG_G(input_buffer), ++buf, --PHPDBG_G(input_buflen));
479 goto exec_code;
480 }
481 }
482 if (*buf == '\n') {
483 nl = buf + 1;
484 }
485 buf++;
486 } while (--PHPDBG_G(input_buflen));
487 if (buf != nl && buf <= nl + seplen) {
488 smart_str_appendl(&code, PHPDBG_G(input_buffer), nl - PHPDBG_G(input_buffer));
489 PHPDBG_G(input_buflen) = buf - nl;
490 memmove(PHPDBG_G(input_buffer), nl, PHPDBG_G(input_buflen));
491 } else {
492 PHPDBG_G(input_buflen) = 0;
493 smart_str_appendl(&code, PHPDBG_G(input_buffer), buf - PHPDBG_G(input_buffer));
494 }
495 } else {
496 smart_str_appendl(&code, PHPDBG_G(input_buffer), PHPDBG_G(input_buflen));
497 PHPDBG_G(input_buflen) = 0;
498 }
499 } 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);
500
501 if (bytes < 0) {
502 PHPDBG_G(flags) |= PHPDBG_IS_QUITTING;
503 zend_bailout();
504 }
505
506 exec_code:
507 smart_str_0(&code);
508
509 if (phpdbg_compile_stdin(code.s) == FAILURE) {
510 zend_exception_error(EG(exception), E_ERROR);
511 zend_bailout();
512 }
513
514 return SUCCESS;
515 } /* }}} */
516
phpdbg_compile_stdin(zend_string * code)517 int phpdbg_compile_stdin(zend_string *code) {
518 PHPDBG_G(ops) = zend_compile_string(code, "Standard input code", ZEND_COMPILE_POSITION_AFTER_OPEN_TAG);
519 zend_string_release(code);
520
521 if (EG(exception)) {
522 return FAILURE;
523 }
524
525 if (PHPDBG_G(exec)) {
526 free(PHPDBG_G(exec));
527 }
528 PHPDBG_G(exec) = strdup("Standard input code");
529 PHPDBG_G(exec_len) = sizeof("Standard input code") - 1;
530 { /* remove leading ?> from source */
531 int i;
532 /* remove trailing data after zero byte, used for avoiding conflicts in eval()'ed code snippets */
533 zend_string *source_path = strpprintf(0, "Standard input code%c%p", 0, PHPDBG_G(ops)->opcodes);
534 phpdbg_file_source *data = zend_hash_find_ptr(&PHPDBG_G(file_sources), source_path);
535 dtor_func_t dtor = PHPDBG_G(file_sources).pDestructor;
536 PHPDBG_G(file_sources).pDestructor = NULL;
537 zend_hash_del(&PHPDBG_G(file_sources), source_path);
538 PHPDBG_G(file_sources).pDestructor = dtor;
539 zend_hash_str_update_ptr(&PHPDBG_G(file_sources), "Standard input code", sizeof("Standard input code")-1, data);
540 zend_string_release(source_path);
541
542 for (i = 1; i <= data->lines; i++) {
543 data->line[i] -= 2;
544 }
545 data->len -= 2;
546 memmove(data->buf, data->buf + 2, data->len);
547 }
548
549 phpdbg_notice("Successful compilation of stdin input");
550
551 return SUCCESS;
552 }
553
phpdbg_compile(void)554 int phpdbg_compile(void) /* {{{ */
555 {
556 zend_file_handle fh;
557 char *buf;
558 size_t len;
559
560 if (!PHPDBG_G(exec)) {
561 phpdbg_error("No execution context");
562 return FAILURE;
563 }
564
565 zend_stream_init_filename(&fh, PHPDBG_G(exec));
566 if (php_stream_open_for_zend_ex(&fh, USE_PATH|STREAM_OPEN_FOR_INCLUDE) == SUCCESS && zend_stream_fixup(&fh, &buf, &len) == SUCCESS) {
567 CG(skip_shebang) = 1;
568 PHPDBG_G(ops) = zend_compile_file(&fh, ZEND_INCLUDE);
569 zend_destroy_file_handle(&fh);
570 if (EG(exception)) {
571 zend_exception_error(EG(exception), E_ERROR);
572 zend_bailout();
573 }
574
575 phpdbg_notice("Successful compilation of %s", PHPDBG_G(exec));
576
577 return SUCCESS;
578 } else {
579 phpdbg_error("Could not open file %s", PHPDBG_G(exec));
580 }
581 zend_destroy_file_handle(&fh);
582 return FAILURE;
583 } /* }}} */
584
PHPDBG_COMMAND(step)585 PHPDBG_COMMAND(step) /* {{{ */
586 {
587 if (PHPDBG_G(in_execution)) {
588 PHPDBG_G(flags) |= PHPDBG_IS_STEPPING;
589 }
590
591 return PHPDBG_NEXT;
592 } /* }}} */
593
PHPDBG_COMMAND(continue)594 PHPDBG_COMMAND(continue) /* {{{ */
595 {
596 return PHPDBG_NEXT;
597 } /* }}} */
598
phpdbg_skip_line_helper(void)599 int phpdbg_skip_line_helper(void) /* {{{ */ {
600 zend_execute_data *ex = phpdbg_user_execute_data(EG(current_execute_data));
601 const zend_op_array *op_array = &ex->func->op_array;
602 const zend_op *opline = op_array->opcodes;
603
604 PHPDBG_G(flags) |= PHPDBG_IN_UNTIL;
605 PHPDBG_G(seek_ex) = ex;
606 do {
607 if (opline->lineno != ex->opline->lineno
608 || opline->opcode == ZEND_RETURN
609 || opline->opcode == ZEND_FAST_RET
610 || opline->opcode == ZEND_GENERATOR_RETURN
611 || opline->opcode == ZEND_YIELD
612 || opline->opcode == ZEND_YIELD_FROM
613 ) {
614 zend_hash_index_update_ptr(&PHPDBG_G(seek), (zend_ulong) opline, (void *) opline);
615 }
616 } while (++opline < op_array->opcodes + op_array->last);
617
618 return PHPDBG_UNTIL;
619 }
620 /* }}} */
621
PHPDBG_COMMAND(until)622 PHPDBG_COMMAND(until) /* {{{ */
623 {
624 if (!PHPDBG_G(in_execution)) {
625 phpdbg_error("Not executing");
626 return SUCCESS;
627 }
628
629 return phpdbg_skip_line_helper();
630 } /* }}} */
631
PHPDBG_COMMAND(next)632 PHPDBG_COMMAND(next) /* {{{ */
633 {
634 if (!PHPDBG_G(in_execution)) {
635 phpdbg_error("Not executing");
636 return SUCCESS;
637 }
638
639 PHPDBG_G(flags) |= PHPDBG_IS_STEPPING;
640 return phpdbg_skip_line_helper();
641 } /* }}} */
642
phpdbg_seek_to_end(void)643 static void phpdbg_seek_to_end(void) /* {{{ */ {
644 zend_execute_data *ex = phpdbg_user_execute_data(EG(current_execute_data));
645 const zend_op_array *op_array = &ex->func->op_array;
646 const zend_op *opline = op_array->opcodes;
647
648 PHPDBG_G(seek_ex) = ex;
649 do {
650 switch (opline->opcode) {
651 case ZEND_RETURN:
652 case ZEND_FAST_RET:
653 case ZEND_GENERATOR_RETURN:
654 case ZEND_YIELD:
655 case ZEND_YIELD_FROM:
656 zend_hash_index_update_ptr(&PHPDBG_G(seek), (zend_ulong) opline, (void *) opline);
657 }
658 } while (++opline < op_array->opcodes + op_array->last);
659 }
660 /* }}} */
661
PHPDBG_COMMAND(finish)662 PHPDBG_COMMAND(finish) /* {{{ */
663 {
664 if (!PHPDBG_G(in_execution)) {
665 phpdbg_error("Not executing");
666 return SUCCESS;
667 }
668
669 phpdbg_seek_to_end();
670 if (zend_hash_index_exists(&PHPDBG_G(seek), (zend_ulong) phpdbg_user_execute_data(EG(current_execute_data))->opline)) {
671 zend_hash_clean(&PHPDBG_G(seek));
672 } else {
673 PHPDBG_G(flags) |= PHPDBG_IN_FINISH;
674 }
675
676 return PHPDBG_FINISH;
677 } /* }}} */
678
PHPDBG_COMMAND(leave)679 PHPDBG_COMMAND(leave) /* {{{ */
680 {
681 if (!PHPDBG_G(in_execution)) {
682 phpdbg_error("Not executing");
683 return SUCCESS;
684 }
685
686 phpdbg_seek_to_end();
687 if (zend_hash_index_exists(&PHPDBG_G(seek), (zend_ulong) phpdbg_user_execute_data(EG(current_execute_data))->opline)) {
688 zend_hash_clean(&PHPDBG_G(seek));
689 phpdbg_notice("Already at the end of the function");
690 return SUCCESS;
691 } else {
692 PHPDBG_G(flags) |= PHPDBG_IN_LEAVE;
693 return PHPDBG_LEAVE;
694 }
695 } /* }}} */
696
PHPDBG_COMMAND(frame)697 PHPDBG_COMMAND(frame) /* {{{ */
698 {
699 if (!param) {
700 phpdbg_notice("Currently in frame #%d", PHPDBG_G(frame).num);
701 } else {
702 phpdbg_switch_frame(param->num);
703 }
704
705 return SUCCESS;
706 } /* }}} */
707
phpdbg_handle_exception(void)708 static inline void phpdbg_handle_exception(void) /* {{{ */
709 {
710 zend_object *ex = EG(exception);
711 zend_string *msg, *file;
712 zend_long line;
713 zval rv, tmp;
714
715 EG(exception) = NULL;
716
717 zend_call_known_instance_method_with_0_params(ex->ce->__tostring, ex, &tmp);
718 file = zval_get_string(zend_read_property_ex(zend_get_exception_base(ex), ex, ZSTR_KNOWN(ZEND_STR_FILE), /* silent */ true, &rv));
719 line = zval_get_long(zend_read_property_ex(zend_get_exception_base(ex), ex, ZSTR_KNOWN(ZEND_STR_LINE), /* silent */ true, &rv));
720
721 if (EG(exception)) {
722 EG(exception) = NULL;
723 msg = ZSTR_EMPTY_ALLOC();
724 } else {
725 zend_update_property_string(zend_get_exception_base(ex), ex, ZEND_STRL("string"), Z_STRVAL(tmp));
726 zval_ptr_dtor(&tmp);
727 msg = zval_get_string(zend_read_property_ex(zend_get_exception_base(ex), ex, ZSTR_KNOWN(ZEND_STR_STRING), /* silent */ true, &rv));
728 }
729
730 phpdbg_error("Uncaught %s in %s on line " ZEND_LONG_FMT, ZSTR_VAL(ex->ce->name), ZSTR_VAL(file), line);
731 zend_string_release(file);
732 phpdbg_writeln("%s", ZSTR_VAL(msg));
733 zend_string_release(msg);
734
735 if (EG(prev_exception)) {
736 OBJ_RELEASE(EG(prev_exception));
737 EG(prev_exception) = 0;
738 }
739 OBJ_RELEASE(ex);
740 EG(opline_before_exception) = NULL;
741
742 EG(exit_status) = 255;
743 } /* }}} */
744
PHPDBG_COMMAND(run)745 PHPDBG_COMMAND(run) /* {{{ */
746 {
747 if (PHPDBG_G(ops) || PHPDBG_G(exec)) {
748 zend_execute_data *ex = EG(current_execute_data);
749 bool restore = 1;
750
751 if (PHPDBG_G(in_execution)) {
752 if (phpdbg_ask_user_permission("Do you really want to restart execution?") == SUCCESS) {
753 phpdbg_startup_run++;
754 phpdbg_clean(1, 1);
755 }
756 return SUCCESS;
757 }
758
759 if (!PHPDBG_G(ops)) {
760 if (phpdbg_compile() == FAILURE) {
761 phpdbg_error("Failed to compile %s, cannot run", PHPDBG_G(exec));
762 EG(exit_status) = FAILURE;
763 goto out;
764 }
765 }
766
767 if (param && param->type != EMPTY_PARAM && param->len != 0) {
768 char **argv = emalloc(5 * sizeof(char *));
769 char *end = param->str + param->len, *p = param->str;
770 char last_byte;
771 int argc = 0;
772 int i;
773
774 while (*end == '\r' || *end == '\n') *(end--) = 0;
775 last_byte = end[1];
776 end[1] = 0;
777
778 while (*p == ' ') p++;
779 while (*p) {
780 char sep = ' ';
781 char *buf = emalloc(end - p + 2), *q = buf;
782
783 if (*p == '<') {
784 /* use as STDIN */
785 do p++; while (*p == ' ');
786
787 if (*p == '\'' || *p == '"') {
788 sep = *(p++);
789 }
790 while (*p && *p != sep) {
791 if (*p == '\\' && (p[1] == sep || p[1] == '\\')) {
792 p++;
793 }
794 *(q++) = *(p++);
795 }
796 *(q++) = 0;
797 if (*p) {
798 do p++; while (*p == ' ');
799 }
800
801 if (*p) {
802 phpdbg_error("Invalid run command, cannot put further arguments after stdin");
803 goto free_cmd;
804 }
805
806 PHPDBG_G(stdin_file) = fopen(buf, "r");
807 if (PHPDBG_G(stdin_file) == NULL) {
808 phpdbg_error("Could not open '%s' for reading from stdin", buf);
809 goto free_cmd;
810 }
811 efree(buf);
812 phpdbg_register_file_handles();
813 break;
814 }
815
816 if (argc >= 4 && argc == (argc & -argc)) {
817 argv = erealloc(argv, (argc * 2 + 1) * sizeof(char *));
818 }
819
820 if (*p == '\'' || *p == '"') {
821 sep = *(p++);
822 }
823 if (*p == '\\' && (p[1] == '<' || p[1] == '\'' || p[1] == '"')) {
824 p++;
825 }
826 while (*p && *p != sep) {
827 if (*p == '\\' && (p[1] == sep || p[1] == '\\' || (p[1] == '#' && sep == ' '))) {
828 p++;
829 }
830 *(q++) = *(p++);
831 }
832 if (!*p && sep != ' ') {
833 phpdbg_error("Invalid run command, unterminated escape sequence");
834 free_cmd:
835 efree(buf);
836 for (i = 0; i < argc; i++) {
837 efree(argv[i]);
838 }
839 efree(argv);
840 end[1] = last_byte;
841 return SUCCESS;
842 }
843
844 *(q++) = 0;
845 argv[++argc] = erealloc(buf, q - buf);
846
847 if (*p) {
848 do p++; while (*p == ' ');
849 }
850 }
851 end[1] = last_byte;
852
853 argv[0] = SG(request_info).argv[0];
854 for (i = SG(request_info).argc; --i;) {
855 efree(SG(request_info).argv[i]);
856 }
857 efree(SG(request_info).argv);
858 SG(request_info).argv = erealloc(argv, ++argc * sizeof(char *));
859 SG(request_info).argc = argc;
860
861 php_build_argv(NULL, &PG(http_globals)[TRACK_VARS_SERVER]);
862 }
863
864 /* clean up from last execution */
865 if (ex && (ZEND_CALL_INFO(ex) & ZEND_CALL_HAS_SYMBOL_TABLE)) {
866 zend_hash_clean(ex->symbol_table);
867 } else {
868 zend_rebuild_symbol_table();
869 }
870 PHPDBG_G(handled_exception) = NULL;
871
872 /* clean seek state */
873 PHPDBG_G(flags) &= ~PHPDBG_SEEK_MASK;
874 zend_hash_clean(&PHPDBG_G(seek));
875
876 /* reset hit counters */
877 phpdbg_reset_breakpoints();
878
879 zend_try {
880 PHPDBG_G(flags) ^= PHPDBG_IS_INTERACTIVE;
881 PHPDBG_G(flags) |= PHPDBG_IS_RUNNING;
882 zend_execute(PHPDBG_G(ops), &PHPDBG_G(retval));
883 PHPDBG_G(flags) ^= PHPDBG_IS_INTERACTIVE;
884 } zend_catch {
885 PHPDBG_G(in_execution) = 0;
886
887 if (!(PHPDBG_G(flags) & PHPDBG_IS_STOPPING)) {
888 restore = 0;
889 } else {
890 zend_bailout();
891 }
892 } zend_end_try();
893
894 if (restore) {
895 zend_exception_restore();
896 zend_try {
897 zend_try_exception_handler();
898 PHPDBG_G(in_execution) = 1;
899 } zend_catch {
900 PHPDBG_G(in_execution) = 0;
901
902 if (PHPDBG_G(flags) & PHPDBG_IS_STOPPING) {
903 zend_bailout();
904 }
905 } zend_end_try();
906
907 if (EG(exception) && !zend_is_unwind_exit(EG(exception))) {
908 phpdbg_handle_exception();
909 }
910 }
911
912 PHPDBG_G(flags) &= ~PHPDBG_IS_RUNNING;
913
914 phpdbg_clean(1, 0);
915 } else {
916 phpdbg_error("Nothing to execute!");
917 }
918
919 out:
920 PHPDBG_FRAME(num) = 0;
921 return SUCCESS;
922 } /* }}} */
923
phpdbg_output_ev_variable(char * name,size_t len,char * keyname,size_t keylen,HashTable * parent,zval * zv)924 int phpdbg_output_ev_variable(char *name, size_t len, char *keyname, size_t keylen, HashTable *parent, zval *zv) /* {{{ */ {
925 phpdbg_notice("Printing variable %.*s", (int) len, name);
926
927 zend_print_zval_r(zv, 0);
928
929 phpdbg_out("\n");
930
931 efree(name);
932 efree(keyname);
933
934 return SUCCESS;
935 }
936 /* }}} */
937
PHPDBG_COMMAND(ev)938 PHPDBG_COMMAND(ev) /* {{{ */
939 {
940 bool stepping = ((PHPDBG_G(flags) & PHPDBG_IS_STEPPING) == PHPDBG_IS_STEPPING);
941 zval retval;
942
943 zend_execute_data *original_execute_data = EG(current_execute_data);
944 zend_vm_stack original_stack = EG(vm_stack);
945 zend_object *ex = NULL;
946
947 PHPDBG_OUTPUT_BACKUP();
948
949 original_stack->top = EG(vm_stack_top);
950
951 if (PHPDBG_G(flags) & PHPDBG_IN_SIGNAL_HANDLER) {
952 phpdbg_try_access {
953 phpdbg_parse_variable(param->str, param->len, &EG(symbol_table), 0, phpdbg_output_ev_variable, 0);
954 } phpdbg_catch_access {
955 phpdbg_error("Could not fetch data, invalid data source");
956 } phpdbg_end_try_access();
957
958 PHPDBG_OUTPUT_BACKUP_RESTORE();
959 return SUCCESS;
960 }
961
962 if (!(PHPDBG_G(flags) & PHPDBG_IS_STEPONEVAL)) {
963 PHPDBG_G(flags) &= ~PHPDBG_IS_STEPPING;
964 }
965
966 /* disable stepping while eval() in progress */
967 PHPDBG_G(flags) |= PHPDBG_IN_EVAL;
968 zend_try {
969 if (zend_eval_stringl(param->str, param->len, &retval, "eval()'d code") == SUCCESS) {
970 if (EG(exception)) {
971 ex = EG(exception);
972 zend_exception_error(EG(exception), E_ERROR);
973 } else {
974 zend_print_zval_r(&retval, 0);
975 phpdbg_out("\n");
976 zval_ptr_dtor(&retval);
977 }
978 }
979 } zend_catch {
980 PHPDBG_G(unclean_eval) = 1;
981 if (ex) {
982 OBJ_RELEASE(ex);
983 }
984 EG(current_execute_data) = original_execute_data;
985 EG(vm_stack_top) = original_stack->top;
986 EG(vm_stack_end) = original_stack->end;
987 EG(vm_stack) = original_stack;
988 EG(exit_status) = 0;
989 } zend_end_try();
990
991 PHPDBG_G(flags) &= ~PHPDBG_IN_EVAL;
992
993 /* switch stepping back on */
994 if (stepping && !(PHPDBG_G(flags) & PHPDBG_IS_STEPONEVAL)) {
995 PHPDBG_G(flags) |= PHPDBG_IS_STEPPING;
996 }
997
998 CG(unclean_shutdown) = 0;
999
1000 PHPDBG_OUTPUT_BACKUP_RESTORE();
1001
1002 return SUCCESS;
1003 } /* }}} */
1004
PHPDBG_COMMAND(back)1005 PHPDBG_COMMAND(back) /* {{{ */
1006 {
1007 if (!PHPDBG_G(in_execution)) {
1008 phpdbg_error("Not executing!");
1009 return SUCCESS;
1010 }
1011
1012 if (!param) {
1013 phpdbg_dump_backtrace(0);
1014 } else {
1015 phpdbg_dump_backtrace(param->num);
1016 }
1017
1018 return SUCCESS;
1019 } /* }}} */
1020
PHPDBG_COMMAND(generator)1021 PHPDBG_COMMAND(generator) /* {{{ */
1022 {
1023 int i;
1024
1025 if (!PHPDBG_G(in_execution)) {
1026 phpdbg_error("Not executing!");
1027 return SUCCESS;
1028 }
1029
1030 if (param) {
1031 i = param->num;
1032 zend_object **obj = EG(objects_store).object_buckets + i;
1033 if (i < EG(objects_store).top && *obj && IS_OBJ_VALID(*obj) && (*obj)->ce == zend_ce_generator) {
1034 zend_generator *gen = (zend_generator *) *obj;
1035 if (gen->execute_data) {
1036 if (zend_generator_get_current(gen)->flags & ZEND_GENERATOR_CURRENTLY_RUNNING) {
1037 phpdbg_error("Generator currently running");
1038 } else {
1039 phpdbg_open_generator_frame(gen);
1040 }
1041 } else {
1042 phpdbg_error("Generator already closed");
1043 }
1044 } else {
1045 phpdbg_error("Invalid object handle");
1046 }
1047 } else {
1048 for (i = 0; i < EG(objects_store).top; i++) {
1049 zend_object *obj = EG(objects_store).object_buckets[i];
1050 if (obj && IS_OBJ_VALID(obj) && obj->ce == zend_ce_generator) {
1051 zend_generator *gen = (zend_generator *) obj, *current = zend_generator_get_current(gen);
1052 if (gen->execute_data) {
1053 zend_string *s = phpdbg_compile_stackframe(gen->execute_data);
1054 phpdbg_out("#%d: %.*s", i, (int) ZSTR_LEN(s), ZSTR_VAL(s));
1055 zend_string_release(s);
1056 if (gen != current) {
1057 if (gen->node.parent != current) {
1058 phpdbg_out(" with direct parent #%d and", gen->node.parent->std.handle);
1059 }
1060 phpdbg_out(" executing #%d currently", current->std.handle);
1061 }
1062 phpdbg_out("\n");
1063 }
1064 }
1065 }
1066 }
1067
1068 return SUCCESS;
1069 } /* }}} */
1070
PHPDBG_COMMAND(print)1071 PHPDBG_COMMAND(print) /* {{{ */
1072 {
1073 if (!param || param->type == EMPTY_PARAM) {
1074 return phpdbg_do_print_stack(param);
1075 } else switch (param->type) {
1076 case STR_PARAM:
1077 return phpdbg_do_print_func(param);
1078 case METHOD_PARAM:
1079 return phpdbg_do_print_method(param);
1080 default:
1081 phpdbg_error("Invalid arguments to print, expected nothing, function name or method name");
1082 return SUCCESS;
1083 }
1084 } /* }}} */
1085
PHPDBG_COMMAND(info)1086 PHPDBG_COMMAND(info) /* {{{ */
1087 {
1088 phpdbg_out("Execution Context Information\n\n");
1089 #ifdef HAVE_PHPDBG_READLINE
1090 # ifdef HAVE_LIBREADLINE
1091 phpdbg_writeln( "Readline yes");
1092 # else
1093 phpdbg_writeln("Readline no");
1094 # endif
1095 # ifdef HAVE_LIBEDIT
1096 phpdbg_writeln("Libedit yes");
1097 # else
1098 phpdbg_writeln("Libedit no");
1099 # endif
1100 #else
1101 phpdbg_writeln("Readline unavailable");
1102 #endif
1103
1104 phpdbg_writeln("Exec %s", PHPDBG_G(exec) ? PHPDBG_G(exec) : "none");
1105 phpdbg_writeln("Compiled %s", PHPDBG_G(ops) ? "yes" : "no");
1106 phpdbg_writeln("Stepping %s", (PHPDBG_G(flags) & PHPDBG_IS_STEPPING) ? "on" : "off");
1107 phpdbg_writeln("Quietness %s", (PHPDBG_G(flags) & PHPDBG_IS_QUIET) ? "on" : "off");
1108
1109 if (PHPDBG_G(ops)) {
1110 phpdbg_writeln("Opcodes %d", PHPDBG_G(ops)->last);
1111 phpdbg_writeln("Variables %d", PHPDBG_G(ops)->last_var ? PHPDBG_G(ops)->last_var - 1 : 0);
1112 }
1113
1114 phpdbg_writeln("Executing %s", PHPDBG_G(in_execution) ? "yes" : "no");
1115 if (PHPDBG_G(in_execution)) {
1116 phpdbg_writeln("VM Return %d", PHPDBG_G(vmret));
1117 }
1118
1119 phpdbg_writeln("Classes %d", zend_hash_num_elements(EG(class_table)));
1120 phpdbg_writeln("Functions %d", zend_hash_num_elements(EG(function_table)));
1121 phpdbg_writeln("Constants %d", zend_hash_num_elements(EG(zend_constants)));
1122 phpdbg_writeln("Included %d", zend_hash_num_elements(&EG(included_files)));
1123
1124 return SUCCESS;
1125 } /* }}} */
1126
PHPDBG_COMMAND(set)1127 PHPDBG_COMMAND(set) /* {{{ */
1128 {
1129 phpdbg_error("No set command selected!");
1130
1131 return SUCCESS;
1132 } /* }}} */
1133
PHPDBG_COMMAND(break)1134 PHPDBG_COMMAND(break) /* {{{ */
1135 {
1136 if (!param) {
1137 if (PHPDBG_G(exec)) {
1138 phpdbg_set_breakpoint_file(
1139 zend_get_executed_filename(),
1140 strlen(zend_get_executed_filename()),
1141 zend_get_executed_lineno());
1142 } else {
1143 phpdbg_error("Execution context not set!");
1144 }
1145 } else switch (param->type) {
1146 case ADDR_PARAM:
1147 phpdbg_set_breakpoint_opline(param->addr);
1148 break;
1149 case NUMERIC_PARAM:
1150 if (PHPDBG_G(exec)) {
1151 phpdbg_set_breakpoint_file(phpdbg_current_file(), strlen(phpdbg_current_file()), param->num);
1152 } else {
1153 phpdbg_error("Execution context not set!");
1154 }
1155 break;
1156 case METHOD_PARAM:
1157 phpdbg_set_breakpoint_method(param->method.class, param->method.name);
1158 break;
1159 case NUMERIC_METHOD_PARAM:
1160 phpdbg_set_breakpoint_method_opline(param->method.class, param->method.name, param->num);
1161 break;
1162 case NUMERIC_FUNCTION_PARAM:
1163 phpdbg_set_breakpoint_function_opline(param->str, param->num);
1164 break;
1165 case FILE_PARAM:
1166 phpdbg_set_breakpoint_file(param->file.name, 0, param->file.line);
1167 break;
1168 case NUMERIC_FILE_PARAM:
1169 phpdbg_set_breakpoint_file_opline(param->file.name, param->file.line);
1170 break;
1171 case COND_PARAM:
1172 phpdbg_set_breakpoint_expression(param->str, param->len);
1173 break;
1174 case STR_PARAM:
1175 phpdbg_set_breakpoint_symbol(param->str, param->len);
1176 break;
1177 case OP_PARAM:
1178 phpdbg_set_breakpoint_opcode(param->str, param->len);
1179 break;
1180
1181 phpdbg_default_switch_case();
1182 }
1183
1184 return SUCCESS;
1185 } /* }}} */
1186
PHPDBG_COMMAND(sh)1187 PHPDBG_COMMAND(sh) /* {{{ */
1188 {
1189 FILE *fd = NULL;
1190 if ((fd=VCWD_POPEN((char*)param->str, "w"))) {
1191 /* TODO: do something perhaps ?? do we want input ?? */
1192 pclose(fd);
1193 } else {
1194 phpdbg_error("Failed to execute %s", param->str);
1195 }
1196
1197 return SUCCESS;
1198 } /* }}} */
1199
add_module_info(zend_module_entry * module)1200 static int add_module_info(zend_module_entry *module) /* {{{ */ {
1201 phpdbg_write("%s\n", module->name);
1202 return 0;
1203 }
1204 /* }}} */
1205
add_zendext_info(zend_extension * ext)1206 static void add_zendext_info(zend_extension *ext) /* {{{ */ {
1207 phpdbg_write("%s\n", ext->name);
1208 }
1209 /* }}} */
1210
1211 #ifdef HAVE_LIBDL
phpdbg_load_module_or_extension(char ** path,const char ** name)1212 PHPDBG_API const char *phpdbg_load_module_or_extension(char **path, const char **name) /* {{{ */ {
1213 DL_HANDLE handle;
1214 char *extension_dir;
1215
1216 extension_dir = INI_STR("extension_dir");
1217
1218 if (strchr(*path, '/') != NULL || strchr(*path, DEFAULT_SLASH) != NULL) {
1219 /* path is fine */
1220 } else if (extension_dir && extension_dir[0]) {
1221 char *libpath;
1222 int extension_dir_len = strlen(extension_dir);
1223 if (IS_SLASH(extension_dir[extension_dir_len-1])) {
1224 spprintf(&libpath, 0, "%s%s", extension_dir, *path); /* SAFE */
1225 } else {
1226 spprintf(&libpath, 0, "%s%c%s", extension_dir, DEFAULT_SLASH, *path); /* SAFE */
1227 }
1228 efree(*path);
1229 *path = libpath;
1230 } else {
1231 phpdbg_error("Not a full path given or extension_dir ini setting is not set");
1232
1233 return NULL;
1234 }
1235
1236 handle = DL_LOAD(*path);
1237
1238 if (!handle) {
1239 #ifdef PHP_WIN32
1240 char *err = GET_DL_ERROR();
1241 if (err && err[0]) {
1242 phpdbg_error("%s", err);
1243 php_win32_error_msg_free(err);
1244 } else {
1245 phpdbg_error("Unknown reason");
1246 }
1247 #else
1248 phpdbg_error("%s", GET_DL_ERROR());
1249 #endif
1250 return NULL;
1251 }
1252
1253 #if ZEND_EXTENSIONS_SUPPORT
1254 do {
1255 zend_extension *new_extension;
1256
1257 const zend_extension_version_info *extension_version_info = (const zend_extension_version_info *) DL_FETCH_SYMBOL(handle, "extension_version_info");
1258 if (!extension_version_info) {
1259 extension_version_info = (const zend_extension_version_info *) DL_FETCH_SYMBOL(handle, "_extension_version_info");
1260 }
1261 new_extension = (zend_extension *) DL_FETCH_SYMBOL(handle, "zend_extension_entry");
1262 if (!new_extension) {
1263 new_extension = (zend_extension *) DL_FETCH_SYMBOL(handle, "_zend_extension_entry");
1264 }
1265 if (!extension_version_info || !new_extension) {
1266 break;
1267 }
1268 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)) {
1269 phpdbg_error("%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);
1270
1271 goto quit;
1272 } 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)) {
1273 phpdbg_error("%s was built with configuration %s, whereas running engine is %s", new_extension->name, extension_version_info->build_id, ZEND_EXTENSION_BUILD_ID);
1274
1275 goto quit;
1276 }
1277
1278 *name = new_extension->name;
1279
1280 zend_register_extension(new_extension, handle);
1281
1282 if (new_extension->startup) {
1283 if (new_extension->startup(new_extension) != SUCCESS) {
1284 phpdbg_error("Unable to startup Zend extension %s", new_extension->name);
1285
1286 goto quit;
1287 }
1288 zend_append_version_info(new_extension);
1289 }
1290
1291 return "Zend extension";
1292 } while (0);
1293 #endif
1294
1295 do {
1296 zend_module_entry *module_entry;
1297 zend_module_entry *(*get_module)(void);
1298
1299 get_module = (zend_module_entry *(*)(void)) DL_FETCH_SYMBOL(handle, "get_module");
1300 if (!get_module) {
1301 get_module = (zend_module_entry *(*)(void)) DL_FETCH_SYMBOL(handle, "_get_module");
1302 }
1303
1304 if (!get_module) {
1305 break;
1306 }
1307
1308 module_entry = get_module();
1309 *name = module_entry->name;
1310
1311 if (strcmp(ZEND_EXTENSION_BUILD_ID, module_entry->build_id)) {
1312 phpdbg_error("%s was built with configuration %s, whereas running engine is %s", module_entry->name, module_entry->build_id, ZEND_EXTENSION_BUILD_ID);
1313
1314 goto quit;
1315 }
1316
1317 if ((module_entry = zend_register_module_ex(module_entry, MODULE_PERSISTENT)) == NULL) {
1318 phpdbg_error("Unable to register module %s", *name);
1319
1320 goto quit;
1321 }
1322
1323 module_entry->handle = handle;
1324
1325 if (zend_startup_module_ex(module_entry) == FAILURE) {
1326 phpdbg_error("Unable to startup module %s", module_entry->name);
1327
1328 goto quit;
1329 }
1330
1331 if (module_entry->request_startup_func) {
1332 if (module_entry->request_startup_func(MODULE_PERSISTENT, module_entry->module_number) == FAILURE) {
1333 phpdbg_error("Unable to initialize module %s", module_entry->name);
1334
1335 goto quit;
1336 }
1337 }
1338
1339 return "module";
1340 } while (0);
1341
1342 phpdbg_error("This shared object is nor a Zend extension nor a module");
1343
1344 quit:
1345 DL_UNLOAD(handle);
1346 return NULL;
1347 }
1348 /* }}} */
1349 #endif
1350
PHPDBG_COMMAND(dl)1351 PHPDBG_COMMAND(dl) /* {{{ */
1352 {
1353 const char *type, *name;
1354 char *path;
1355
1356 if (!param || param->type == EMPTY_PARAM) {
1357 phpdbg_notice("Zend extensions");
1358 zend_llist_apply(&zend_extensions, (llist_apply_func_t) add_zendext_info);
1359 phpdbg_out("\n");
1360 phpdbg_notice("Modules");
1361 zend_hash_apply(&module_registry, (apply_func_t) add_module_info);
1362 } else switch (param->type) {
1363 case STR_PARAM:
1364 #ifdef HAVE_LIBDL
1365 path = estrndup(param->str, param->len);
1366
1367 phpdbg_activate_err_buf(1);
1368 if ((type = phpdbg_load_module_or_extension(&path, &name)) == NULL) {
1369 phpdbg_error("Could not load %s, not found or invalid zend extension / module: %s", path, PHPDBG_G(err_buf).msg);
1370 } else {
1371 phpdbg_notice("Successfully loaded the %s %s at path %s", type, name, path);
1372 }
1373 phpdbg_activate_err_buf(0);
1374 phpdbg_free_err_buf();
1375 efree(path);
1376 #else
1377 phpdbg_error("Cannot dynamically load %.*s - dynamic modules are not supported", (int) param->len, param->str);
1378 #endif
1379 break;
1380
1381 phpdbg_default_switch_case();
1382 }
1383
1384 return SUCCESS;
1385 } /* }}} */
1386
PHPDBG_COMMAND(source)1387 PHPDBG_COMMAND(source) /* {{{ */
1388 {
1389 zend_stat_t sb = {0};
1390
1391 if (VCWD_STAT(param->str, &sb) != -1) {
1392 phpdbg_try_file_init(param->str, param->len, 0);
1393 } else {
1394 phpdbg_error("Failed to stat %s, file does not exist", param->str);
1395 }
1396
1397 return SUCCESS;
1398 } /* }}} */
1399
PHPDBG_COMMAND(export)1400 PHPDBG_COMMAND(export) /* {{{ */
1401 {
1402 FILE *handle = VCWD_FOPEN(param->str, "w+");
1403
1404 if (handle) {
1405 phpdbg_export_breakpoints(handle);
1406 fclose(handle);
1407 } else {
1408 phpdbg_error("Failed to open or create %s, check path and permissions", param->str);
1409 }
1410
1411 return SUCCESS;
1412 } /* }}} */
1413
PHPDBG_COMMAND(register)1414 PHPDBG_COMMAND(register) /* {{{ */
1415 {
1416 zend_function *function;
1417 char *lcname = zend_str_tolower_dup(param->str, param->len);
1418 size_t lcname_len = param->len;
1419
1420 if (!zend_hash_str_exists(&PHPDBG_G(registered), lcname, lcname_len)) {
1421 if ((function = zend_hash_str_find_ptr(EG(function_table), lcname, lcname_len))) {
1422 zend_hash_str_update_ptr(&PHPDBG_G(registered), lcname, lcname_len, function);
1423 function_add_ref(function);
1424
1425 phpdbg_notice("Registered %s", lcname);
1426 } else {
1427 phpdbg_error("The requested function (%s) could not be found", param->str);
1428 }
1429 } else {
1430 phpdbg_error("The requested name (%s) is already in use", lcname);
1431 }
1432
1433 efree(lcname);
1434 return SUCCESS;
1435 } /* }}} */
1436
PHPDBG_COMMAND(quit)1437 PHPDBG_COMMAND(quit) /* {{{ */
1438 {
1439 PHPDBG_G(flags) |= PHPDBG_IS_QUITTING;
1440 PHPDBG_G(flags) &= ~PHPDBG_IS_CLEANING;
1441
1442 return SUCCESS;
1443 } /* }}} */
1444
PHPDBG_COMMAND(clean)1445 PHPDBG_COMMAND(clean) /* {{{ */
1446 {
1447 if (PHPDBG_G(in_execution)) {
1448 if (phpdbg_ask_user_permission("Do you really want to clean your current environment?") == FAILURE) {
1449 return SUCCESS;
1450 }
1451 }
1452
1453 phpdbg_out("Cleaning Execution Environment\n");
1454
1455 phpdbg_writeln("Classes %d", zend_hash_num_elements(EG(class_table)));
1456 phpdbg_writeln("Functions %d", zend_hash_num_elements(EG(function_table)));
1457 phpdbg_writeln("Constants %d", zend_hash_num_elements(EG(zend_constants)));
1458 phpdbg_writeln("Includes %d", zend_hash_num_elements(&EG(included_files)));
1459
1460 phpdbg_clean(1, 0);
1461
1462 return SUCCESS;
1463 } /* }}} */
1464
PHPDBG_COMMAND(clear)1465 PHPDBG_COMMAND(clear) /* {{{ */
1466 {
1467 phpdbg_out("Clearing Breakpoints\n");
1468
1469 phpdbg_writeln("File %d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE]));
1470 phpdbg_writeln("Functions %d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_SYM]));
1471 phpdbg_writeln("Methods %d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_METHOD]));
1472 phpdbg_writeln("Oplines %d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_OPLINE]));
1473 phpdbg_writeln("File oplines %d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE_OPLINE]));
1474 phpdbg_writeln("Function oplines %d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_FUNCTION_OPLINE]));
1475 phpdbg_writeln("Method oplines %d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_METHOD_OPLINE]));
1476 phpdbg_writeln("Conditionals %d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_COND]));
1477
1478 phpdbg_clear_breakpoints();
1479
1480 return SUCCESS;
1481 } /* }}} */
1482
PHPDBG_COMMAND(list)1483 PHPDBG_COMMAND(list) /* {{{ */
1484 {
1485 if (!param) {
1486 return PHPDBG_LIST_HANDLER(lines)(PHPDBG_COMMAND_ARGS);
1487 } else switch (param->type) {
1488 case NUMERIC_PARAM:
1489 return PHPDBG_LIST_HANDLER(lines)(PHPDBG_COMMAND_ARGS);
1490
1491 case FILE_PARAM:
1492 return PHPDBG_LIST_HANDLER(lines)(PHPDBG_COMMAND_ARGS);
1493
1494 case STR_PARAM:
1495 phpdbg_list_function_byname(param->str, param->len);
1496 break;
1497
1498 case METHOD_PARAM:
1499 return PHPDBG_LIST_HANDLER(method)(PHPDBG_COMMAND_ARGS);
1500
1501 phpdbg_default_switch_case();
1502 }
1503
1504 return SUCCESS;
1505 } /* }}} */
1506
PHPDBG_COMMAND(watch)1507 PHPDBG_COMMAND(watch) /* {{{ */
1508 {
1509 if (!param || param->type == EMPTY_PARAM) {
1510 phpdbg_list_watchpoints();
1511 } else switch (param->type) {
1512 case STR_PARAM:
1513 phpdbg_create_var_watchpoint(param->str, param->len);
1514 break;
1515
1516 phpdbg_default_switch_case();
1517 }
1518
1519 return SUCCESS;
1520 } /* }}} */
1521
phpdbg_interactive(bool allow_async_unsafe,char * input)1522 int phpdbg_interactive(bool allow_async_unsafe, char *input) /* {{{ */
1523 {
1524 int ret = SUCCESS;
1525 phpdbg_param_t stack;
1526
1527 PHPDBG_G(flags) |= PHPDBG_IS_INTERACTIVE;
1528
1529 while (ret == SUCCESS || ret == FAILURE) {
1530 if (PHPDBG_G(flags) & PHPDBG_IS_STOPPING) {
1531 zend_bailout();
1532 }
1533
1534 if (!input && !(input = phpdbg_read_input(NULL))) {
1535 break;
1536 }
1537
1538
1539 phpdbg_init_param(&stack, STACK_PARAM);
1540
1541 if (phpdbg_do_parse(&stack, input) <= 0) {
1542 phpdbg_activate_err_buf(1);
1543
1544 zend_try {
1545 ret = phpdbg_stack_execute(&stack, allow_async_unsafe);
1546 } zend_catch {
1547 phpdbg_stack_free(&stack);
1548 phpdbg_destroy_input(&input);
1549 /* TODO: should use proper unwinding instead of bailing out */
1550 zend_bailout();
1551 } zend_end_try();
1552
1553 switch (ret) {
1554 case FAILURE:
1555 if (!(PHPDBG_G(flags) & PHPDBG_IS_STOPPING)) {
1556 if (!allow_async_unsafe || phpdbg_call_register(&stack) == FAILURE) {
1557 if (PHPDBG_G(err_buf).active) {
1558 phpdbg_output_err_buf("%s", PHPDBG_G(err_buf).msg);
1559 }
1560 }
1561 }
1562 break;
1563
1564 case PHPDBG_LEAVE:
1565 case PHPDBG_FINISH:
1566 case PHPDBG_UNTIL:
1567 case PHPDBG_NEXT: {
1568 phpdbg_activate_err_buf(0);
1569 phpdbg_free_err_buf();
1570 if (!PHPDBG_G(in_execution) && !(PHPDBG_G(flags) & PHPDBG_IS_STOPPING)) {
1571 phpdbg_error("Not running");
1572 }
1573 break;
1574 }
1575 }
1576
1577 phpdbg_activate_err_buf(0);
1578 phpdbg_free_err_buf();
1579 }
1580
1581 phpdbg_stack_free(&stack);
1582 phpdbg_destroy_input(&input);
1583 PHPDBG_G(req_id) = 0;
1584 input = NULL;
1585 }
1586
1587 if (input) {
1588 phpdbg_stack_free(&stack);
1589 phpdbg_destroy_input(&input);
1590 PHPDBG_G(req_id) = 0;
1591 }
1592
1593 if (PHPDBG_G(in_execution)) {
1594 phpdbg_restore_frame();
1595 }
1596
1597 PHPDBG_G(flags) &= ~PHPDBG_IS_INTERACTIVE;
1598
1599 phpdbg_print_changed_zvals();
1600
1601 return ret;
1602 } /* }}} */
1603
list_code(void)1604 static inline void list_code(void) {
1605 if (!(PHPDBG_G(flags) & PHPDBG_IN_EVAL)) {
1606 const char *file_char = zend_get_executed_filename();
1607 zend_string *file = zend_string_init(file_char, strlen(file_char), 0);
1608 phpdbg_list_file(file, 3, zend_get_executed_lineno()-1, zend_get_executed_lineno());
1609 efree(file);
1610 }
1611 }
1612
1613 /* code may behave weirdly if EG(exception) is set; thus backup it */
1614 #define DO_INTERACTIVE(allow_async_unsafe) do { \
1615 if (exception) { \
1616 const zend_op *before_ex = EG(opline_before_exception); \
1617 const zend_op *backup_opline = NULL; \
1618 if (EG(current_execute_data) && EG(current_execute_data)->func && ZEND_USER_CODE(EG(current_execute_data)->func->common.type)) { \
1619 backup_opline = EG(current_execute_data)->opline; \
1620 } \
1621 GC_ADDREF(exception); \
1622 zend_clear_exception(); \
1623 list_code(); \
1624 switch (phpdbg_interactive(allow_async_unsafe, NULL)) { \
1625 case PHPDBG_LEAVE: \
1626 case PHPDBG_FINISH: \
1627 case PHPDBG_UNTIL: \
1628 case PHPDBG_NEXT: \
1629 if (backup_opline \
1630 && (backup_opline->opcode == ZEND_HANDLE_EXCEPTION || backup_opline->opcode == ZEND_CATCH)) { \
1631 EG(current_execute_data)->opline = backup_opline; \
1632 EG(exception) = exception; \
1633 } else { \
1634 zend_throw_exception_internal(exception); \
1635 } \
1636 EG(opline_before_exception) = before_ex; \
1637 } \
1638 } else { \
1639 list_code(); \
1640 phpdbg_interactive(allow_async_unsafe, NULL); \
1641 } \
1642 goto next; \
1643 } while (0)
1644
phpdbg_execute_ex(zend_execute_data * execute_data)1645 void phpdbg_execute_ex(zend_execute_data *execute_data) /* {{{ */
1646 {
1647 bool original_in_execution = PHPDBG_G(in_execution);
1648
1649 if ((PHPDBG_G(flags) & PHPDBG_IS_STOPPING) && !(PHPDBG_G(flags) & PHPDBG_IS_RUNNING)) {
1650 zend_bailout();
1651 }
1652
1653 PHPDBG_G(in_execution) = 1;
1654
1655 #ifdef ZEND_CHECK_STACK_LIMIT
1656 if (UNEXPECTED(zend_call_stack_overflowed(EG(stack_limit)))) {
1657 zend_call_stack_size_error();
1658 /* No opline was executed before exception */
1659 EG(opline_before_exception) = NULL;
1660 /* Fall through to handle exception below. */
1661 }
1662 #endif /* ZEND_CHECK_STACK_LIMIT */
1663
1664 while (1) {
1665 zend_object *exception = EG(exception);
1666
1667 if ((PHPDBG_G(flags) & PHPDBG_BP_RESOLVE_MASK)) {
1668 /* resolve nth opline breakpoints */
1669 phpdbg_resolve_op_array_breaks(&execute_data->func->op_array);
1670 }
1671
1672 #ifdef ZEND_WIN32
1673 if (zend_atomic_bool_load_ex(&EG(timed_out))) {
1674 zend_timeout();
1675 }
1676 #endif
1677
1678 if (exception && zend_is_unwind_exit(exception)) {
1679 /* Restore bailout based exit. */
1680 zend_bailout();
1681 }
1682
1683 if (PHPDBG_G(flags) & PHPDBG_PREVENT_INTERACTIVE) {
1684 phpdbg_print_opline(execute_data, 0);
1685 goto next;
1686 }
1687
1688 /* check for uncaught exceptions */
1689 if (exception && PHPDBG_G(handled_exception) != exception && !(PHPDBG_G(flags) & PHPDBG_IN_EVAL)) {
1690 zend_execute_data *prev_ex = execute_data;
1691
1692 do {
1693 prev_ex = zend_generator_check_placeholder_frame(prev_ex);
1694 /* assuming that no internal functions will silently swallow exceptions ... */
1695 if (!prev_ex->func || !ZEND_USER_CODE(prev_ex->func->common.type)) {
1696 continue;
1697 }
1698
1699 if (phpdbg_check_caught_ex(prev_ex, exception)) {
1700 goto ex_is_caught;
1701 }
1702 } while ((prev_ex = prev_ex->prev_execute_data));
1703
1704 PHPDBG_G(handled_exception) = exception;
1705
1706 zval rv;
1707 zend_string *file = zval_get_string(zend_read_property_ex(zend_get_exception_base(exception), exception, ZSTR_KNOWN(ZEND_STR_FILE), /* silent */ true, &rv));
1708 zend_long line = zval_get_long(zend_read_property_ex(zend_get_exception_base(exception), exception, ZSTR_KNOWN(ZEND_STR_LINE), /* silent */ true, &rv));
1709 zend_string *msg = zval_get_string(zend_read_property_ex(zend_get_exception_base(exception), exception, ZSTR_KNOWN(ZEND_STR_MESSAGE), /* silent */ true, &rv));
1710
1711 phpdbg_error("Uncaught %s in %s on line " ZEND_LONG_FMT ": %.*s",
1712 ZSTR_VAL(exception->ce->name), ZSTR_VAL(file), line,
1713 ZSTR_LEN(msg) < 80 ? (int) ZSTR_LEN(msg) : 80, ZSTR_VAL(msg));
1714 zend_string_release(msg);
1715 zend_string_release(file);
1716
1717 DO_INTERACTIVE(1);
1718 }
1719 ex_is_caught:
1720
1721 /* allow conditional breakpoints and initialization to access the vm uninterrupted */
1722 if (PHPDBG_G(flags) & (PHPDBG_IN_COND_BP | PHPDBG_IS_INITIALIZING)) {
1723 /* skip possible breakpoints */
1724 goto next;
1725 }
1726
1727 /* not while in conditionals */
1728 phpdbg_print_opline(execute_data, 0);
1729
1730 /* perform seek operation */
1731 if ((PHPDBG_G(flags) & PHPDBG_SEEK_MASK) && !(PHPDBG_G(flags) & PHPDBG_IN_EVAL)) {
1732 /* current address */
1733 zend_ulong address = (zend_ulong) execute_data->opline;
1734
1735 if (PHPDBG_G(seek_ex) != execute_data) {
1736 if (PHPDBG_G(flags) & PHPDBG_IS_STEPPING) {
1737 goto stepping;
1738 }
1739 goto next;
1740 }
1741
1742 #define INDEX_EXISTS_CHECK (zend_hash_index_exists(&PHPDBG_G(seek), address) || (exception && phpdbg_check_caught_ex(execute_data, exception) == 0))
1743
1744 /* run to next line */
1745 if (PHPDBG_G(flags) & PHPDBG_IN_UNTIL) {
1746 if (INDEX_EXISTS_CHECK) {
1747 PHPDBG_G(flags) &= ~PHPDBG_IN_UNTIL;
1748 zend_hash_clean(&PHPDBG_G(seek));
1749 } else {
1750 /* skip possible breakpoints */
1751 goto next;
1752 }
1753 }
1754
1755 /* run to finish */
1756 if (PHPDBG_G(flags) & PHPDBG_IN_FINISH) {
1757 if (INDEX_EXISTS_CHECK) {
1758 PHPDBG_G(flags) &= ~PHPDBG_IN_FINISH;
1759 zend_hash_clean(&PHPDBG_G(seek));
1760 }
1761 /* skip possible breakpoints */
1762 goto next;
1763 }
1764
1765 /* break for leave */
1766 if (PHPDBG_G(flags) & PHPDBG_IN_LEAVE) {
1767 if (INDEX_EXISTS_CHECK) {
1768 PHPDBG_G(flags) &= ~PHPDBG_IN_LEAVE;
1769 zend_hash_clean(&PHPDBG_G(seek));
1770 phpdbg_notice("Breaking for leave at %s:%u",
1771 zend_get_executed_filename(),
1772 zend_get_executed_lineno()
1773 );
1774 DO_INTERACTIVE(1);
1775 } else {
1776 /* skip possible breakpoints */
1777 goto next;
1778 }
1779 }
1780 }
1781
1782 if (PHPDBG_G(flags) & PHPDBG_IS_STEPPING && (PHPDBG_G(flags) & PHPDBG_STEP_OPCODE || execute_data->opline->lineno != PHPDBG_G(last_line))) {
1783 stepping:
1784 PHPDBG_G(flags) &= ~PHPDBG_IS_STEPPING;
1785 DO_INTERACTIVE(1);
1786 }
1787
1788 /* check if some watchpoint was hit */
1789 {
1790 if (phpdbg_print_changed_zvals() == SUCCESS) {
1791 DO_INTERACTIVE(1);
1792 }
1793 }
1794
1795 /* search for breakpoints */
1796 {
1797 phpdbg_breakbase_t *brake;
1798
1799 if ((PHPDBG_G(flags) & PHPDBG_BP_MASK)
1800 && (brake = phpdbg_find_breakpoint(execute_data))
1801 && (brake->type != PHPDBG_BREAK_FILE || execute_data->opline->lineno != PHPDBG_G(last_line))) {
1802 phpdbg_hit_breakpoint(brake, 1);
1803 DO_INTERACTIVE(1);
1804 }
1805 }
1806
1807 if (PHPDBG_G(flags) & PHPDBG_IS_SIGNALED) {
1808 PHPDBG_G(flags) &= ~PHPDBG_IS_SIGNALED;
1809
1810 phpdbg_out("\n");
1811 phpdbg_notice("Program received signal SIGINT");
1812 DO_INTERACTIVE(1);
1813 }
1814
1815 next:
1816
1817 PHPDBG_G(last_line) = execute_data->opline->lineno;
1818
1819 /* stupid hack to make zend_do_fcall_common_helper return ZEND_VM_ENTER() instead of recursively calling zend_execute() and eventually segfaulting */
1820 if ((execute_data->opline->opcode == ZEND_DO_FCALL ||
1821 execute_data->opline->opcode == ZEND_DO_UCALL ||
1822 execute_data->opline->opcode == ZEND_DO_FCALL_BY_NAME) &&
1823 execute_data->call->func->type == ZEND_USER_FUNCTION) {
1824 zend_execute_ex = execute_ex;
1825 }
1826 PHPDBG_G(vmret) = zend_vm_call_opcode_handler(execute_data);
1827 zend_execute_ex = phpdbg_execute_ex;
1828
1829 if (PHPDBG_G(vmret) != 0) {
1830 if (PHPDBG_G(vmret) < 0) {
1831 PHPDBG_G(in_execution) = original_in_execution;
1832 return;
1833 } else {
1834 execute_data = EG(current_execute_data);
1835 }
1836 }
1837 }
1838 zend_error_noreturn(E_ERROR, "Arrived at end of main loop which shouldn't happen");
1839 } /* }}} */
1840
1841 /* only if *not* interactive and while executing */
phpdbg_force_interruption(void)1842 void phpdbg_force_interruption(void) /* {{{ */ {
1843 zend_object *exception = EG(exception);
1844 zend_execute_data *data = EG(current_execute_data); /* should be always readable if not NULL */
1845
1846 PHPDBG_G(flags) |= PHPDBG_IN_SIGNAL_HANDLER;
1847
1848 if (data) {
1849 if (data->func) {
1850 if (ZEND_USER_CODE(data->func->type)) {
1851 phpdbg_notice("Current opline: %p (op #%u) in %s:%u",
1852 data->opline,
1853 (uint32_t) (data->opline - data->func->op_array.opcodes),
1854 data->func->op_array.filename->val,
1855 data->opline->lineno);
1856 } else if (data->func->internal_function.function_name) {
1857 phpdbg_notice("Current opline: in internal function %s",
1858 data->func->internal_function.function_name->val);
1859 } else {
1860 phpdbg_notice("Current opline: executing internal code");
1861 }
1862 } else {
1863 phpdbg_notice("Current opline: %p (op_array information unavailable)",
1864 data->opline);
1865 }
1866 } else {
1867 phpdbg_notice("No information available about executing context");
1868 }
1869
1870 DO_INTERACTIVE(0);
1871
1872 next:
1873 PHPDBG_G(flags) &= ~PHPDBG_IN_SIGNAL_HANDLER;
1874
1875 if (PHPDBG_G(flags) & PHPDBG_IS_STOPPING) {
1876 zend_bailout();
1877 }
1878 }
1879 /* }}} */
1880
