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Fix valgrind false positives with watchpoints

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This commit is contained in:
Bob Weinand 2015-08-12 10:42:40 +00:00
parent 0f68f12d95
commit c17afbc4f1
1 changed files with 38 additions and 16 deletions
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30
sapi/phpdbg/phpdbg_watch.c
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@ -322,6 +322,16 @@ static phpdbg_watchpoint_t *phpdbg_get_refcount_watch(phpdbg_watchpoint_t *paren
static phpdbg_watchpoint_t *phpdbg_create_watchpoint(phpdbg_watchpoint_t *watch) {
phpdbg_watchpoint_t *ret = watch;
if (watch->type == WATCH_ON_ZVAL) {
switch (Z_TYPE_P(watch->addr.zv)) {
case IS_NULL:
case IS_UNDEF:
case IS_TRUE:
case IS_FALSE:
memset(watch->addr.zv, 0, sizeof(zend_value));
}
}
/* exclude references & refcounted */
if (!watch->parent || watch->parent->type != WATCH_ON_ZVAL || watch->type == WATCH_ON_HASHTABLE) {
phpdbg_watchpoint_t *old_watch = zend_hash_find_ptr(&PHPDBG_G(watchpoints), watch->str);
@ -949,23 +959,35 @@ static void phpdbg_print_changed_zval(phpdbg_watch_memdump *dump) {
}
/* Show to the user what changed and delete watchpoint upon removal */
if (memcmp(oldPtr, watch->addr.ptr, watch->size) != SUCCESS) {
{
zend_bool do_break = 0;
if (watch->flags & PHPDBG_WATCH_NORMAL) {
switch (watch->type) {
case WATCH_ON_ZVAL:
do_break = memcmp(oldPtr, watch->addr.zv, sizeof(zend_value) + sizeof(uint32_t) /* value + typeinfo */);
if (!do_break) {
goto end;
}
break;
case WATCH_ON_HASHTABLE:
do_break = zend_hash_num_elements(HT_PTR_HT(oldPtr)) != zend_hash_num_elements(HT_WATCH_HT(watch));
if (!do_break) {
goto end;
}
break;
case WATCH_ON_REFCOUNTED:
if (PHPDBG_G(flags) & PHPDBG_SHOW_REFCOUNTS) {
do_break = memcmp(oldPtr, watch->addr.ref, sizeof(uint32_t) /* no zend_refcounted metadata info */);
if (!do_break) {
goto end;
}
if (!(PHPDBG_G(flags) & PHPDBG_SHOW_REFCOUNTS)) {
do_break = 0;
}
break;
}
if (!(watch->flags & PHPDBG_WATCH_NORMAL)) {
do_break = 0;
}
if (do_break) {
@ -1067,7 +1089,7 @@ static void phpdbg_print_changed_zval(phpdbg_watch_memdump *dump) {
if (do_break) {
phpdbg_xml("</watchdata>");
}
}
} end:
dump->reenable_writing = dump->reenable_writing | reenable;
}