diff options
Diffstat (limited to 'sapi/phpdbg/phpdbg_watch.c')
| -rw-r--r-- | sapi/phpdbg/phpdbg_watch.c | 787 |
1 files changed, 787 insertions, 0 deletions
diff --git a/sapi/phpdbg/phpdbg_watch.c b/sapi/phpdbg/phpdbg_watch.c new file mode 100644 index 0000000000..9ee580ca0b --- /dev/null +++ b/sapi/phpdbg/phpdbg_watch.c @@ -0,0 +1,787 @@ +/* + +----------------------------------------------------------------------+ + | PHP Version 5 | + +----------------------------------------------------------------------+ + | Copyright (c) 1997-2014 The PHP Group | + +----------------------------------------------------------------------+ + | This source file is subject to version 3.01 of the PHP license, | + | that is bundled with this package in the file LICENSE, and is | + | available through the world-wide-web at the following url: | + | http://www.php.net/license/3_01.txt | + | If you did not receive a copy of the PHP license and are unable to | + | obtain it through the world-wide-web, please send a note to | + | license@php.net so we can mail you a copy immediately. | + +----------------------------------------------------------------------+ + | Authors: Felipe Pena <felipe@php.net> | + | Authors: Joe Watkins <joe.watkins@live.co.uk> | + | Authors: Bob Weinand <bwoebi@php.net> | + +----------------------------------------------------------------------+ +*/ + +#include "zend.h" +#include "phpdbg.h" +#include "phpdbg_btree.h" +#include "phpdbg_watch.h" +#include "phpdbg_utils.h" +#ifndef _WIN32 +# include <unistd.h> +# include <sys/mman.h> +#endif + +ZEND_EXTERN_MODULE_GLOBALS(phpdbg); + + +typedef struct { + void *page; + size_t size; + char reenable_writing; + /* data must be last element */ + void *data; +} phpdbg_watch_memdump; + +#define MEMDUMP_SIZE(size) (sizeof(phpdbg_watch_memdump) - sizeof(void *) + (size)) + + +static phpdbg_watchpoint_t *phpdbg_check_for_watchpoint(void *addr TSRMLS_DC) { + phpdbg_watchpoint_t *watch; + phpdbg_btree_result *result = phpdbg_btree_find_closest(&PHPDBG_G(watchpoint_tree), (zend_ulong)phpdbg_get_page_boundary(addr) + phpdbg_pagesize - 1); + + if (result == NULL) { + return NULL; + } + + watch = result->ptr; + + /* check if that addr is in a mprotect()'ed memory area */ + if ((char *)phpdbg_get_page_boundary(watch->addr.ptr) > (char *)addr || (char *)phpdbg_get_page_boundary(watch->addr.ptr) + phpdbg_get_total_page_size(watch->addr.ptr, watch->size) < (char *)addr) { + /* failure */ + return NULL; + } + + return watch; +} + +static void phpdbg_change_watchpoint_access(phpdbg_watchpoint_t *watch, int access TSRMLS_DC) { + int m; + + /* pagesize is assumed to be in the range of 2^x */ + m = mprotect(phpdbg_get_page_boundary(watch->addr.ptr), phpdbg_get_total_page_size(watch->addr.ptr, watch->size), access); +} + +static inline void phpdbg_activate_watchpoint(phpdbg_watchpoint_t *watch TSRMLS_DC) { + phpdbg_change_watchpoint_access(watch, PROT_READ TSRMLS_CC); +} + +static inline void phpdbg_deactivate_watchpoint(phpdbg_watchpoint_t *watch TSRMLS_DC) { + phpdbg_change_watchpoint_access(watch, PROT_READ | PROT_WRITE TSRMLS_CC); +} + +static inline void phpdbg_store_watchpoint(phpdbg_watchpoint_t *watch TSRMLS_DC) { + phpdbg_btree_insert(&PHPDBG_G(watchpoint_tree), (zend_ulong)watch->addr.ptr, watch); +} + +static inline void phpdbg_remove_watchpoint(phpdbg_watchpoint_t *watch TSRMLS_DC) { + phpdbg_btree_delete(&PHPDBG_G(watchpoint_tree), (zend_ulong)watch->addr.ptr); +} + +void phpdbg_create_addr_watchpoint(void *addr, size_t size, phpdbg_watchpoint_t *watch) { + watch->addr.ptr = addr; + watch->size = size; +} + +void phpdbg_create_zval_watchpoint(zval *zv, phpdbg_watchpoint_t *watch) { + phpdbg_create_addr_watchpoint(zv, sizeof(zval), watch); + watch->type = WATCH_ON_ZVAL; +} + +void phpdbg_create_ht_watchpoint(HashTable *ht, phpdbg_watchpoint_t *watch) { + phpdbg_create_addr_watchpoint(ht, sizeof(HashTable), watch); + watch->type = WATCH_ON_HASHTABLE; +} + +void phpdbg_watch_HashTable_dtor(zval **ptr); + +static int phpdbg_create_watchpoint(phpdbg_watchpoint_t *watch TSRMLS_DC) { + watch->flags |= PHPDBG_WATCH_SIMPLE; + + phpdbg_store_watchpoint(watch TSRMLS_CC); + zend_hash_add(&PHPDBG_G(watchpoints), watch->str, watch->str_len, &watch, sizeof(phpdbg_watchpoint_t *), NULL); + + if (watch->type == WATCH_ON_ZVAL) { + phpdbg_btree_insert(&PHPDBG_G(watch_HashTables), (zend_ulong)watch->parent_container, watch->parent_container->pDestructor); + watch->parent_container->pDestructor = (dtor_func_t)phpdbg_watch_HashTable_dtor; + } + + phpdbg_activate_watchpoint(watch TSRMLS_CC); + + return SUCCESS; +} + +static int phpdbg_create_array_watchpoint(phpdbg_watchpoint_t *watch TSRMLS_DC) { + HashTable *ht; + + switch (Z_TYPE_P(watch->addr.zv)) { + case IS_ARRAY: + ht = Z_ARRVAL_P(watch->addr.zv); + break; + case IS_OBJECT: + ht = Z_OBJPROP_P(watch->addr.zv); + break; + default: + return FAILURE; + } + + phpdbg_create_ht_watchpoint(ht, watch); + + phpdbg_create_watchpoint(watch TSRMLS_CC); + + return SUCCESS; +} + +static char *phpdbg_get_property_key(char *key) { + if (*key != 0) { + return key; + } + return strchr(key + 1, 0) + 1; +} + +static int phpdbg_create_recursive_watchpoint(phpdbg_watchpoint_t *watch TSRMLS_DC) { + HashTable *ht; + + if (watch->type != WATCH_ON_ZVAL) { + return FAILURE; + } + + watch->flags |= PHPDBG_WATCH_RECURSIVE; + phpdbg_create_watchpoint(watch TSRMLS_CC); + + switch (Z_TYPE_P(watch->addr.zv)) { + case IS_ARRAY: + ht = Z_ARRVAL_P(watch->addr.zv); + break; + case IS_OBJECT: + ht = Z_OBJPROP_P(watch->addr.zv); + break; + default: + return SUCCESS; + } + + { + HashPosition position; + zval **zv; + zval key; + + for (zend_hash_internal_pointer_reset_ex(ht, &position); + zend_hash_get_current_data_ex(ht, (void **)&zv, &position) == SUCCESS; + zend_hash_move_forward_ex(ht, &position)) { + phpdbg_watchpoint_t *new_watch = emalloc(sizeof(phpdbg_watchpoint_t)); + + new_watch->flags = PHPDBG_WATCH_RECURSIVE; + new_watch->parent = watch; + new_watch->parent_container = ht; + + zend_hash_get_current_key_zval_ex(ht, &key, &position); + if (Z_TYPE(key) == IS_STRING) { + new_watch->name_in_parent = zend_strndup(Z_STRVAL(key), Z_STRLEN(key)); + new_watch->name_in_parent_len = Z_STRLEN(key); + } else { + new_watch->name_in_parent = NULL; + new_watch->name_in_parent_len = asprintf(&new_watch->name_in_parent, "%ld", Z_LVAL(key)); + } + + new_watch->str = NULL; + new_watch->str_len = asprintf(&new_watch->str, "%.*s%s%s%s", (int)watch->str_len, watch->str, Z_TYPE_P(watch->addr.zv) == IS_ARRAY?"[":"->", phpdbg_get_property_key(new_watch->name_in_parent), Z_TYPE_P(watch->addr.zv) == IS_ARRAY?"]":""); + + phpdbg_create_zval_watchpoint(*zv, new_watch); + phpdbg_create_recursive_watchpoint(new_watch TSRMLS_CC); + } + } + + { + phpdbg_watchpoint_t *new_watch = emalloc(sizeof(phpdbg_watchpoint_t)); + + new_watch->parent = watch; + new_watch->parent_container = watch->parent_container; + new_watch->name_in_parent = zend_strndup(watch->name_in_parent, watch->name_in_parent_len); + new_watch->name_in_parent_len = watch->name_in_parent_len; + new_watch->str = NULL; + new_watch->str_len = asprintf(&new_watch->str, "%.*s[]", (int)watch->str_len, watch->str); + new_watch->flags = PHPDBG_WATCH_RECURSIVE; + + phpdbg_create_ht_watchpoint(ht, new_watch); + phpdbg_create_watchpoint(new_watch TSRMLS_CC); + } + + return SUCCESS; +} + +static int phpdbg_delete_watchpoint_recursive(phpdbg_watchpoint_t *watch, zend_bool user_request TSRMLS_DC) { + if (watch->type == WATCH_ON_HASHTABLE || (watch->type == WATCH_ON_ZVAL && (Z_TYPE_P(watch->addr.zv) == IS_ARRAY || Z_TYPE_P(watch->addr.zv) == IS_OBJECT))) { + HashTable *ht; + phpdbg_btree_result *result; + + if (watch->type == WATCH_ON_HASHTABLE && user_request) { + HashPosition position; + zval **zv; + zval key; + char *str; + int str_len; + phpdbg_watchpoint_t **watchpoint; + + ht = watch->addr.ht; + + for (zend_hash_internal_pointer_reset_ex(ht, &position); + zend_hash_get_current_data_ex(ht, (void **)&zv, &position) == SUCCESS; + zend_hash_move_forward_ex(ht, &position)) { + zend_hash_get_current_key_zval_ex(ht, &key, &position); + str = NULL; + if (Z_TYPE(key) == IS_STRING) { + str_len = asprintf(&str, "%.*s%s%s%s", (int)watch->parent->str_len, watch->parent->str, Z_TYPE_P(watch->parent->addr.zv) == IS_ARRAY?"[":"->", phpdbg_get_property_key(Z_STRVAL(key)), Z_TYPE_P(watch->parent->addr.zv) == IS_ARRAY?"]":""); + } else { + str_len = asprintf(&str, "%.*s%s%li%s", (int)watch->parent->str_len, watch->parent->str, Z_TYPE_P(watch->parent->addr.zv) == IS_ARRAY?"[":"->", Z_LVAL(key), Z_TYPE_P(watch->parent->addr.zv) == IS_ARRAY?"]":""); + } + + if (zend_hash_find(&PHPDBG_G(watchpoints), str, str_len, (void **) &watchpoint) == SUCCESS) { + phpdbg_delete_watchpoint_recursive(*watchpoint, 1 TSRMLS_CC); + } + } + } else { + switch (Z_TYPE_P(watch->addr.zv)) { + case IS_ARRAY: + ht = Z_ARRVAL_P(watch->addr.zv); + break; + case IS_OBJECT: + ht = Z_OBJPROP_P(watch->addr.zv); + break; + } + + if ((result = phpdbg_btree_find(&PHPDBG_G(watchpoint_tree), (zend_ulong) ht))) { + phpdbg_delete_watchpoint_recursive((phpdbg_watchpoint_t *) result->ptr, user_request TSRMLS_CC); + } + } + } + + return zend_hash_del(&PHPDBG_G(watchpoints), watch->str, watch->str_len); +} + +static int phpdbg_delete_watchpoint(phpdbg_watchpoint_t *tmp_watch TSRMLS_DC) { + int ret; + phpdbg_watchpoint_t *watch; + phpdbg_btree_result *result; + + if ((result = phpdbg_btree_find(&PHPDBG_G(watchpoint_tree), (zend_ulong)tmp_watch->addr.ptr)) == NULL) { + return FAILURE; + } + + watch = result->ptr; + + if (watch->flags & PHPDBG_WATCH_RECURSIVE) { + ret = phpdbg_delete_watchpoint_recursive(watch, 1 TSRMLS_CC); + } else { + ret = zend_hash_del(&PHPDBG_G(watchpoints), watch->str, watch->str_len); + } + + free(tmp_watch->str); + efree(tmp_watch); + + return ret; +} + +static int phpdbg_watchpoint_parse_input(char *input, size_t len, HashTable *parent, size_t i, int (*callback)(phpdbg_watchpoint_t * TSRMLS_DC), zend_bool silent TSRMLS_DC) { + int ret = FAILURE; + zend_bool new_index = 1; + char *last_index; + int index_len = 0; + zval **zv; + + if (len < 2 || *input != '$') { + goto error; + } + + while (i++ < len) { + if (i == len) { + new_index = 1; + } else { + switch (input[i]) { + case '[': + new_index = 1; + break; + case ']': + break; + case '>': + if (last_index[index_len - 1] == '-') { + new_index = 1; + index_len--; + } + break; + + default: + if (new_index) { + last_index = input + i; + new_index = 0; + } + if (input[i - 1] == ']') { + goto error; + } + index_len++; + } + } + + if (new_index && index_len == 0) { + HashPosition position; + for (zend_hash_internal_pointer_reset_ex(parent, &position); + zend_hash_get_current_data_ex(parent, (void **)&zv, &position) == SUCCESS; + zend_hash_move_forward_ex(parent, &position)) { + if (i == len || (i == len - 1 && input[len - 1] == ']')) { + zval *key = emalloc(sizeof(zval)); + phpdbg_watchpoint_t *watch = emalloc(sizeof(phpdbg_watchpoint_t)); + watch->flags = 0; + zend_hash_get_current_key_zval_ex(parent, key, &position); + convert_to_string(key); + watch->str = malloc(i + Z_STRLEN_P(key) + 2); + watch->str_len = sprintf(watch->str, "%.*s%s%s", (int)i, input, phpdbg_get_property_key(Z_STRVAL_P(key)), input[len - 1] == ']'?"]":""); + efree(key); + watch->name_in_parent = zend_strndup(last_index, index_len); + watch->name_in_parent_len = index_len; + watch->parent_container = parent; + phpdbg_create_zval_watchpoint(*zv, watch); + + ret = callback(watch TSRMLS_CC) == SUCCESS || ret == SUCCESS?SUCCESS:FAILURE; + } else if (Z_TYPE_PP(zv) == IS_OBJECT) { + phpdbg_watchpoint_parse_input(input, len, Z_OBJPROP_PP(zv), i, callback, silent TSRMLS_CC); + } else if (Z_TYPE_PP(zv) == IS_ARRAY) { + phpdbg_watchpoint_parse_input(input, len, Z_ARRVAL_PP(zv), i, callback, silent TSRMLS_CC); + } else { + /* Ignore silently */ + } + } + return ret; + } else if (new_index) { + char last_chr = last_index[index_len]; + last_index[index_len] = 0; + if (zend_symtable_find(parent, last_index, index_len + 1, (void **)&zv) == FAILURE) { + if (!silent) { + phpdbg_error("%.*s is undefined", (int)i, input); + } + return FAILURE; + } + last_index[index_len] = last_chr; + if (i == len) { + phpdbg_watchpoint_t *watch = emalloc(sizeof(phpdbg_watchpoint_t)); + watch->flags = 0; + watch->str = zend_strndup(input, len); + watch->str_len = len; + watch->name_in_parent = zend_strndup(last_index, index_len); + watch->name_in_parent_len = index_len; + watch->parent_container = parent; + phpdbg_create_zval_watchpoint(*zv, watch); + + ret = callback(watch TSRMLS_CC) == SUCCESS || ret == SUCCESS?SUCCESS:FAILURE; + } else if (Z_TYPE_PP(zv) == IS_OBJECT) { + parent = Z_OBJPROP_PP(zv); + } else if (Z_TYPE_PP(zv) == IS_ARRAY) { + parent = Z_ARRVAL_PP(zv); + } else { + phpdbg_error("%.*s is nor an array nor an object", (int)i, input); + return FAILURE; + } + index_len = 0; + } + } + + return ret; + error: + phpdbg_error("Malformed input"); + return FAILURE; +} + +static int phpdbg_watchpoint_parse_symtables(char *input, size_t len, int (*callback)(phpdbg_watchpoint_t * TSRMLS_DC) TSRMLS_DC) { + if (EG(This) && len >= 5 && !memcmp("$this", input, 5)) { + zend_hash_add(EG(active_symbol_table), "this", sizeof("this"), &EG(This), sizeof(zval *), NULL); + } + + if (zend_is_auto_global(input, len TSRMLS_CC) && phpdbg_watchpoint_parse_input(input, len, &EG(symbol_table), 0, callback, 1 TSRMLS_CC) != FAILURE) { + return SUCCESS; + } + + return phpdbg_watchpoint_parse_input(input, len, EG(active_symbol_table), 0, callback, 0 TSRMLS_CC); +} + +PHPDBG_WATCH(delete) /* {{{ */ +{ + switch (param->type) { + case STR_PARAM: + if (phpdbg_delete_var_watchpoint(param->str, param->len TSRMLS_CC) == FAILURE) { + phpdbg_error("Nothing was deleted, no corresponding watchpoint found"); + } else { + phpdbg_notice("Removed watchpoint %.*s", (int)param->len, param->str); + } + break; + + phpdbg_default_switch_case(); + } + + return SUCCESS; +} /* }}} */ + +PHPDBG_WATCH(recursive) /* {{{ */ +{ + if (phpdbg_rebuild_symtable(TSRMLS_C) == FAILURE) { + return SUCCESS; + } + + switch (param->type) { + case STR_PARAM: + if (phpdbg_watchpoint_parse_symtables(param->str, param->len, phpdbg_create_recursive_watchpoint TSRMLS_CC) != FAILURE) { + phpdbg_notice("Set recursive watchpoint on %.*s", (int)param->len, param->str); + } + break; + + phpdbg_default_switch_case(); + } + + return SUCCESS; +} /* }}} */ + +PHPDBG_WATCH(array) /* {{{ */ +{ + if (phpdbg_rebuild_symtable(TSRMLS_C) == FAILURE) { + return SUCCESS; + } + + switch (param->type) { + case STR_PARAM: + if (phpdbg_watchpoint_parse_symtables(param->str, param->len, phpdbg_create_array_watchpoint TSRMLS_CC) != FAILURE) { + phpdbg_notice("Set array watchpoint on %.*s", (int)param->len, param->str); + } + break; + + phpdbg_default_switch_case(); + } + + return SUCCESS; +} /* }}} */ + +void phpdbg_watch_HashTable_dtor(zval **zv) { + phpdbg_btree_result *result; + zval_ptr_dtor_wrapper(zv); + TSRMLS_FETCH(); + + + if ((result = phpdbg_btree_find(&PHPDBG_G(watchpoint_tree), (zend_ulong)*zv))) { + phpdbg_watchpoint_t *watch = result->ptr; + + PHPDBG_G(watchpoint_hit) = 1; + + phpdbg_notice("%.*s was removed, removing watchpoint%s", (int)watch->str_len, watch->str, (watch->flags & PHPDBG_WATCH_RECURSIVE)?" recursively":""); + + if (watch->flags & PHPDBG_WATCH_RECURSIVE) { + phpdbg_delete_watchpoint_recursive(watch, 0 TSRMLS_CC); + } else { + zend_hash_del(&PHPDBG_G(watchpoints), watch->str, watch->str_len); + } + } +} + + +int phpdbg_create_var_watchpoint(char *input, size_t len TSRMLS_DC) { + if (phpdbg_rebuild_symtable(TSRMLS_C) == FAILURE) { + return FAILURE; + } + + return phpdbg_watchpoint_parse_symtables(input, len, phpdbg_create_watchpoint TSRMLS_CC); +} + +int phpdbg_delete_var_watchpoint(char *input, size_t len TSRMLS_DC) { + if (phpdbg_rebuild_symtable(TSRMLS_C) == FAILURE) { + return FAILURE; + } + + return phpdbg_watchpoint_parse_symtables(input, len, phpdbg_delete_watchpoint TSRMLS_CC); +} + +#ifdef _WIN32 +int phpdbg_watchpoint_segfault_handler(void *addr TSRMLS_DC) { +#else +int phpdbg_watchpoint_segfault_handler(siginfo_t *info, void *context TSRMLS_DC) { +#endif + void *page; + phpdbg_watch_memdump *dump; + phpdbg_watchpoint_t *watch; + size_t size; + + watch = phpdbg_check_for_watchpoint( +#ifdef _WIN32 + addr +#else + info->si_addr +#endif + TSRMLS_CC); + + if (watch == NULL) { + return FAILURE; + } + + page = phpdbg_get_page_boundary(watch->addr.ptr); + size = phpdbg_get_total_page_size(watch->addr.ptr, watch->size); + + /* re-enable writing */ + mprotect(page, size, PROT_READ | PROT_WRITE); + + dump = malloc(MEMDUMP_SIZE(size)); + dump->page = page; + dump->size = size; + + memcpy(&dump->data, page, size); + + zend_llist_add_element(&PHPDBG_G(watchlist_mem), &dump); + + return SUCCESS; +} + +void phpdbg_watchpoints_clean(TSRMLS_D) { + zend_hash_clean(&PHPDBG_G(watchpoints)); +} + +static void phpdbg_watch_dtor(void *pDest) { + phpdbg_watchpoint_t *watch = *(phpdbg_watchpoint_t **)pDest; + TSRMLS_FETCH(); + + phpdbg_deactivate_watchpoint(watch TSRMLS_CC); + phpdbg_remove_watchpoint(watch TSRMLS_CC); + + free(watch->str); + free(watch->name_in_parent); + efree(watch); +} + +static void phpdbg_watch_mem_dtor(void *llist_data) { + phpdbg_watch_memdump *dump = *(phpdbg_watch_memdump **)llist_data; + + /* Disble writing again */ + if (dump->reenable_writing) { + mprotect(dump->page, dump->size, PROT_READ); + } + + free(*(void **)llist_data); +} + +void phpdbg_setup_watchpoints(TSRMLS_D) { +#if _SC_PAGE_SIZE + phpdbg_pagesize = sysconf(_SC_PAGE_SIZE); +#elif _SC_PAGESIZE + phpdbg_pagesize = sysconf(_SC_PAGESIZE); +#elif _SC_NUTC_OS_PAGESIZE + phpdbg_pagesize = sysconf(_SC_NUTC_OS_PAGESIZE); +#else + phpdbg_pagesize = 4096; /* common pagesize */ +#endif + + zend_llist_init(&PHPDBG_G(watchlist_mem), sizeof(void *), phpdbg_watch_mem_dtor, 1); + phpdbg_btree_init(&PHPDBG_G(watchpoint_tree), sizeof(void *) * 8); + phpdbg_btree_init(&PHPDBG_G(watch_HashTables), sizeof(void *) * 8); + _zend_hash_init(&PHPDBG_G(watchpoints), 8, phpdbg_watch_dtor, 0 ZEND_FILE_LINE_CC); +} + +static void phpdbg_print_changed_zval(phpdbg_watch_memdump *dump TSRMLS_DC) { + /* fetch all changes between dump->page and dump->page + dump->size */ + phpdbg_btree_position pos = phpdbg_btree_find_between(&PHPDBG_G(watchpoint_tree), (zend_ulong)dump->page, (zend_ulong)dump->page + dump->size); + phpdbg_btree_result *result, *htresult; + int elementDiff; + void *curTest; + + dump->reenable_writing = 0; + + while ((result = phpdbg_btree_next(&pos))) { + phpdbg_watchpoint_t *watch = result->ptr, *htwatch; + void *oldPtr = (char *)&dump->data + ((size_t)watch->addr.ptr - (size_t)dump->page); + char reenable = 1; + + if ((size_t)watch->addr.ptr < (size_t)dump->page || (size_t)watch->addr.ptr + watch->size > (size_t)dump->page + dump->size) { + continue; + } + + /* Test if the zval was separated and if necessary move the watchpoint */ + if (zend_hash_find(watch->parent_container, watch->name_in_parent, watch->name_in_parent_len + 1, &curTest) == SUCCESS) { + if (watch->type == WATCH_ON_HASHTABLE) { + switch (Z_TYPE_PP((zval **)curTest)) { + case IS_ARRAY: + curTest = (void *)Z_ARRVAL_PP((zval **)curTest); + break; + case IS_OBJECT: + curTest = (void *)Z_OBJPROP_PP((zval **)curTest); + break; + } + } else { + curTest = *(void **)curTest; + } + + if (curTest != watch->addr.ptr) { + phpdbg_deactivate_watchpoint(watch TSRMLS_CC); + phpdbg_remove_watchpoint(watch TSRMLS_CC); + watch->addr.ptr = curTest; + phpdbg_store_watchpoint(watch TSRMLS_CC); + phpdbg_activate_watchpoint(watch TSRMLS_CC); + + reenable = 0; + } + } + + /* Show to the user what changed and delete watchpoint upon removal */ + if (memcmp(oldPtr, watch->addr.ptr, watch->size) != SUCCESS) { + if (PHPDBG_G(flags) & PHPDBG_SHOW_REFCOUNTS || (watch->type == WATCH_ON_ZVAL && memcmp(oldPtr, watch->addr.zv, sizeof(zvalue_value))) || (watch->type == WATCH_ON_HASHTABLE +#if ZEND_DEBUG + && !watch->addr.ht->inconsistent +#endif + && zend_hash_num_elements((HashTable *)oldPtr) != zend_hash_num_elements(watch->addr.ht))) { + PHPDBG_G(watchpoint_hit) = 1; + + phpdbg_notice("Breaking on watchpoint %s", watch->str); + } + + switch (watch->type) { + case WATCH_ON_ZVAL: { + int removed = ((zval *)oldPtr)->refcount__gc != watch->addr.zv->refcount__gc && !zend_symtable_exists(watch->parent_container, watch->name_in_parent, watch->name_in_parent_len + 1); + int show_value = memcmp(oldPtr, watch->addr.zv, sizeof(zvalue_value)); + int show_ref = ((zval *)oldPtr)->refcount__gc != watch->addr.zv->refcount__gc || ((zval *)oldPtr)->is_ref__gc != watch->addr.zv->is_ref__gc; + + if (removed || show_value) { + phpdbg_write("Old value: "); + if ((Z_TYPE_P((zval *)oldPtr) == IS_ARRAY || Z_TYPE_P((zval *)oldPtr) == IS_OBJECT) && removed) { + phpdbg_writeln("Value inaccessible, HashTable already destroyed"); + } else { + zend_print_flat_zval_r((zval *)oldPtr TSRMLS_CC); + phpdbg_writeln(""); + } + } + if (PHPDBG_G(flags) & PHPDBG_SHOW_REFCOUNTS && (removed || show_ref)) { + phpdbg_writeln("Old refcount: %d; Old is_ref: %d", ((zval *)oldPtr)->refcount__gc, ((zval *)oldPtr)->is_ref__gc); + } + + /* check if zval was removed */ + if (removed) { + phpdbg_notice("Watchpoint %s was unset, removing watchpoint", watch->str); + zend_hash_del(&PHPDBG_G(watchpoints), watch->str, watch->str_len); + + reenable = 0; + + if (Z_TYPE_P((zval *)oldPtr) == IS_ARRAY || Z_TYPE_P((zval *)oldPtr) == IS_OBJECT) { + goto remove_ht_watch; + } + + break; + } + + if (show_value) { + phpdbg_write("New value: "); + zend_print_flat_zval_r(watch->addr.zv TSRMLS_CC); + phpdbg_writeln(""); + } + if (PHPDBG_G(flags) & PHPDBG_SHOW_REFCOUNTS && show_ref) { + phpdbg_writeln("New refcount: %d; New is_ref: %d", watch->addr.zv->refcount__gc, watch->addr.zv->is_ref__gc); + } + + if ((Z_TYPE_P(watch->addr.zv) == IS_ARRAY && Z_ARRVAL_P(watch->addr.zv) != Z_ARRVAL_P((zval *)oldPtr)) || (Z_TYPE_P(watch->addr.zv) != IS_OBJECT && Z_OBJ_HANDLE_P(watch->addr.zv) == Z_OBJ_HANDLE_P((zval *)oldPtr))) { + /* add new watchpoints if necessary */ + if (watch->flags & PHPDBG_WATCH_RECURSIVE) { + phpdbg_create_recursive_watchpoint(watch TSRMLS_CC); + } + } + + if ((Z_TYPE_P((zval *)oldPtr) != IS_ARRAY || Z_ARRVAL_P(watch->addr.zv) == Z_ARRVAL_P((zval *)oldPtr)) && (Z_TYPE_P((zval *)oldPtr) != IS_OBJECT || Z_OBJ_HANDLE_P(watch->addr.zv) == Z_OBJ_HANDLE_P((zval *)oldPtr))) { + break; + } + +remove_ht_watch: + if ((htresult = phpdbg_btree_find(&PHPDBG_G(watchpoint_tree), (zend_ulong)Z_ARRVAL_P((zval *)oldPtr)))) { + htwatch = htresult->ptr; + zend_hash_del(&PHPDBG_G(watchpoints), htwatch->str, htwatch->str_len); + } + + break; + } + case WATCH_ON_HASHTABLE: + +#ifdef ZEND_DEBUG + if (watch->addr.ht->inconsistent) { + phpdbg_notice("Watchpoint %s was unset, removing watchpoint", watch->str); + zend_hash_del(&PHPDBG_G(watchpoints), watch->str, watch->str_len); + + reenable = 0; + + break; + } +#endif + + elementDiff = zend_hash_num_elements((HashTable *)oldPtr) - zend_hash_num_elements(watch->addr.ht); + if (elementDiff) { + if (elementDiff > 0) { + phpdbg_writeln("%d elements were removed from the array", elementDiff); + } else { + phpdbg_writeln("%d elements were added to the array", -elementDiff); + + /* add new watchpoints if necessary */ + if (watch->flags & PHPDBG_WATCH_RECURSIVE) { + phpdbg_create_recursive_watchpoint(watch TSRMLS_CC); + } + } + } + if (((HashTable *)oldPtr)->pInternalPointer != watch->addr.ht->pInternalPointer) { + phpdbg_writeln("Internal pointer of array was changed"); + } + break; + } + } + + dump->reenable_writing = dump->reenable_writing | reenable; + } +} + +int phpdbg_print_changed_zvals(TSRMLS_D) { + zend_llist_position pos; + phpdbg_watch_memdump **dump; + int ret; + + if (zend_llist_count(&PHPDBG_G(watchlist_mem)) == 0) { + return FAILURE; + } + + dump = (phpdbg_watch_memdump **)zend_llist_get_last_ex(&PHPDBG_G(watchlist_mem), &pos); + + do { + phpdbg_print_changed_zval(*dump TSRMLS_CC); + } while ((dump = (phpdbg_watch_memdump **)zend_llist_get_prev_ex(&PHPDBG_G(watchlist_mem), &pos))); + + zend_llist_clean(&PHPDBG_G(watchlist_mem)); + + ret = PHPDBG_G(watchpoint_hit)?SUCCESS:FAILURE; + PHPDBG_G(watchpoint_hit) = 0; + + return ret; +} + +void phpdbg_list_watchpoints(TSRMLS_D) { + HashPosition position; + phpdbg_watchpoint_t **watch; + + for (zend_hash_internal_pointer_reset_ex(&PHPDBG_G(watchpoints), &position); + zend_hash_get_current_data_ex(&PHPDBG_G(watchpoints), (void**) &watch, &position) == SUCCESS; + zend_hash_move_forward_ex(&PHPDBG_G(watchpoints), &position)) { + phpdbg_writeln("%.*s", (int)(*watch)->str_len, (*watch)->str); + } +} + +void phpdbg_watch_efree(void *ptr) { + phpdbg_btree_result *result = phpdbg_btree_find_closest(&PHPDBG_G(watchpoint_tree), (zend_ulong)ptr); + TSRMLS_FETCH(); + + if (result) { + phpdbg_watchpoint_t *watch = result->ptr; + + if ((size_t)watch->addr.ptr + watch->size > (size_t)ptr) { + zend_hash_del(&PHPDBG_G(watchpoints), watch->str, watch->str_len); + } + } + + PHPDBG_G(original_free_function)(ptr); +} |