Description:
------------
I get a bus error for most of the PHP tests. An easy example is test004.sh.

The Solaris Sparc platform is sensitive to correct alignment for 32 bit and 64 bit types. They must be aligned on corresponding address boundaries, which is not true in the case of these crashes.

The crash happens for 32 Bit builds in Zend/zend_ini.c:671 (OnUpdateLong):

669     p = (zend_long *) (base+(size_t) mh_arg1);
670
671     *p = zend_atol(ZSTR_VAL(new_value), ZSTR_LEN(new_value));

Here the address p is:

        p = 0xfb1f63d5 <mbstring_globals+97>
        base = 0xfb1f6374 <mbstring_globals> ""

which is an odd address. Since on this platform zend_long has size 4 (bytes) this would need to be divisible by 4. The value for mh_arg1 comes from the next frame Zend/zend_ini.c:269 (zend_register_ini_entries):

268             if (p->on_modify) {
269                 p->on_modify(p, p->value, p->mh_arg1, p->mh_arg2, p->mh_arg3, ZEND_INI_STAGE_STARTUP);
270             }

There p is:

{name = 0x186760, on_modify = 0xfee87aa8 <OnUpdateLong>, mh_arg1 = 0x61, mh_arg2 = 0xfb276374 <mbstring_globals>, mh_arg3 = 0x0, value = 0x3de70, orig_value = 0x0,
  displayer = 0x384b8 <zend_ini_boolean_displayer_cb@plt>, module_number = 30, modifiable = 7 '\a', orig_modifiable = 0 '\000', modified = 0 '\000'}

and mh_arg1 is set in

241         p->mh_arg1 = ini_entry->mh_arg1;

This is ini_entry:

{name = 0xfb246a80 "mbstring.strict_detection", on_modify = 0xfee87aa8 <OnUpdateLong>, mh_arg1 = 0x61, mh_arg2 = 0xfb276374 <mbstring_globals>, mh_arg3 = 0x0,
  value = 0xfb246a38 "0", displayer = 0x384b8 <zend_ini_boolean_displayer_cb@plt>, value_length = 1, name_length = 25, modifiable = 7 '\a'}

The next frame is ext/mbstring/mbstring.c:1579 (zm_startup_mbstring):

1579            REGISTER_INI_ENTRIES();

The crash does not happen or Linux on x86_64 platforms with 64 bit builds. These platforms are less sensitive for misalignment.

Regards,

Rainer