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Fix potential segfaults and unresolved breaks

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This commit is contained in:
Bob Weinand 2014-10-28 12:38:07 +01:00
parent fe5f5d40f2
commit 79c66e7cd2
1 changed files with 37 additions and 19 deletions
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56
sapi/phpdbg/phpdbg_bp.c
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@ -232,6 +232,8 @@ PHPDBG_API void phpdbg_set_breakpoint_file(const char *path, long line_num TSRML
}
path_len = strlen(path);
phpdbg_debug("file path: %s, resolved path: %s, was compiled: %d\n", original_path, path, zend_hash_exists(&PHPDBG_G(file_sources), path, path_len));
if (!zend_hash_exists(&PHPDBG_G(file_sources), path, path_len)) {
if (php_stream_stat_path(path, &ssb) == FAILURE) {
if (original_path[0] == '/') {
@ -246,6 +248,8 @@ PHPDBG_API void phpdbg_set_breakpoint_file(const char *path, long line_num TSRML
} else if (!(ssb.sb.st_mode & (S_IFREG|S_IFLNK))) {
phpdbg_error("breakpoint", "type=\"notregular\" add=\"fail\" file=\"%s\"", "Cannot set breakpoint in %s, it is not a regular file", path);
return;
} else {
phpdbg_debug("File exists, but not compiled\n");
}
}
@ -273,9 +277,13 @@ PHPDBG_API void phpdbg_set_breakpoint_file(const char *path, long line_num TSRML
for (zend_hash_internal_pointer_reset_ex(&PHPDBG_G(file_sources), &position);
zend_hash_get_current_key_ex(&PHPDBG_G(file_sources), &file, &filelen, NULL, 0, &position) == HASH_KEY_IS_STRING;
zend_hash_move_forward_ex(&PHPDBG_G(file_sources), &position)) {
if (!(pending = ((broken = phpdbg_resolve_pending_file_break_ex(file, filelen, path, path_len, broken TSRMLS_CC)) == NULL))) {
HashTable *fileht;
phpdbg_debug("Compare against loaded %s\n", file);
if (!(pending = ((fileht = phpdbg_resolve_pending_file_break_ex(file, filelen, path, path_len, broken TSRMLS_CC)) == NULL))) {
phpdbg_breakfile_t *brake;
zend_hash_index_find(broken, line_num, (void **) &brake);
zend_hash_index_find(fileht, line_num, (void **) &brake);
new_break = *brake;
break;
}
@ -298,18 +306,19 @@ PHPDBG_API void phpdbg_set_breakpoint_file(const char *path, long line_num TSRML
PHPDBG_API HashTable *phpdbg_resolve_pending_file_break_ex(const char *file, uint filelen, const char *cur, uint curlen, HashTable *fileht TSRMLS_DC) /* {{{ */
{
if (curlen < filelen && file[filelen - curlen - 1] == '/' && !memcmp(file + filelen - curlen, cur, curlen)) {
phpdbg_debug("file: %s, filelen: %u, cur: %s, curlen %u, pos: %c, memcmp: %d\n", file, filelen, cur, curlen, filelen > curlen ? file[filelen - curlen - 1] : '?', filelen > curlen ? memcmp(file + filelen - curlen, cur, curlen) : 0);
if (((curlen < filelen && file[filelen - curlen - 1] == '/') || filelen == curlen) && !memcmp(file + filelen - curlen, cur, curlen)) {
phpdbg_breakfile_t *brake, new_brake;
HashTable *master = NULL;
HashPosition position;
dtor_func_t dtor;
PHPDBG_G(flags) |= PHPDBG_HAS_FILE_BP;
if (zend_hash_find(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE], file, filelen, (void **) &master) == FAILURE) {
dtor = PHPDBG_G(bp)[PHPDBG_BREAK_FILE_PENDING].pDestructor;
PHPDBG_G(bp)[PHPDBG_BREAK_FILE_PENDING].pDestructor = NULL;
zend_hash_add(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE], file, filelen, fileht, sizeof(HashTable), (void **) &fileht);
HashTable new_ht;
zend_hash_init(&new_ht, 8, NULL, phpdbg_file_breaks_dtor, 0);
zend_hash_add(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE], file, filelen, &new_ht, sizeof(HashTable), (void **) &master);
}
for (zend_hash_internal_pointer_reset_ex(fileht, &position);
@ -322,24 +331,18 @@ PHPDBG_API HashTable *phpdbg_resolve_pending_file_break_ex(const char *file, uin
if (master) {
zend_hash_index_update(master, brake->line, (void **) &new_brake, sizeof(phpdbg_breakfile_t), NULL);
PHPDBG_BREAK_MAPPING(brake->id, master);
} else {
efree((char *) brake->filename);
*brake = new_brake;
PHPDBG_BREAK_MAPPING(brake->id, fileht);
}
}
zend_hash_del(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE_PENDING], cur, curlen);
if (!master) {
PHPDBG_G(bp)[PHPDBG_BREAK_FILE_PENDING].pDestructor = dtor;
}
if (!zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE_PENDING])) {
PHPDBG_G(flags) &= ~PHPDBG_HAS_PENDING_FILE_BP;
}
return fileht;
phpdbg_debug("compiled file: %s, cur bp file: %s\n", file, cur);
return master;
}
return NULL;
@ -351,6 +354,8 @@ PHPDBG_API void phpdbg_resolve_pending_file_break(const char *file TSRMLS_DC) /*
HashTable *fileht;
uint filelen = strlen(file);
phpdbg_debug("was compiled: %s\n", file);
zend_hash_internal_pointer_reset_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE_PENDING], &position);
while (zend_hash_get_current_data_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE_PENDING], (void**) &fileht, &position) == SUCCESS) {
const char *cur;
@ -359,6 +364,8 @@ PHPDBG_API void phpdbg_resolve_pending_file_break(const char *file TSRMLS_DC) /*
zend_hash_get_current_key_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE_PENDING], (char **) &cur, &curlen, NULL, 0, &position);
zend_hash_move_forward_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE_PENDING], &position);
phpdbg_debug("check bp: %s\n", cur);
phpdbg_resolve_pending_file_break_ex(file, filelen, cur, curlen, fileht TSRMLS_CC);
}
}
@ -877,10 +884,21 @@ static inline phpdbg_breakbase_t *phpdbg_find_breakpoint_file(zend_op_array *op_
{
HashTable *breaks;
phpdbg_breakbase_t *brake;
size_t name_len = strlen(op_array->filename);
size_t path_len;
char realpath[MAXPATHLEN];
const char *path = op_array->filename;
if (zend_hash_find(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE], op_array->filename,
name_len, (void**)&breaks) == FAILURE) {
if (VCWD_REALPATH(path, realpath)) {
path = realpath;
}
path_len = strlen(path);
#if 0
phpdbg_debug("Op at: %.*s %d\n", path_len, path, (*EG(opline_ptr))->lineno);
#endif
if (zend_hash_find(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE], path, path_len, (void**)&breaks) == FAILURE) {
return NULL;
}