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[2015-08-09 14:27 UTC] shish+phpwtf at shishnet dot org
Description:
------------
When using PDO with the sqlite engine and persistent connections, and adding a custom sqlite function, the process exits with status code 1 (which makes my unit tests fail) whether it is successful (should exit with 0) or not (should exit with 2)
- in php5.[456] the exit code is 0
- with persistent connections turned off, the exit is 0
- with no custom function, the exit is 0
- no exceptions are thrown, the script proceeds as though nothing is wrong
- if you add "exit(2)" to the end of the test script, you can see that even this "explicitly exit with code 2" exits with code 1 if an sqlite function has been added to a persistent connection.
I guess maybe there is some sort of "if using persistent connections, then add a register_shutdown_function() function which cleans up custom functions so that custom functions added to this connection won't affect following requests", and that code is calling exit(1)?
Test script:
---------------
<?php
$db = new PDO('sqlite:test.sqlite', null, null, array(PDO::ATTR_PERSISTENT => true));
function _test() { return 42; }
$db->sqliteCreateFunction('test', '_test', 0);
print("Everything is fine, no exceptions here\n");
Expected result:
----------------
the script should exit with code 0 (or code 2 if you add "exit(2);" at the end)
Actual result:
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the script exits with code 1
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I can confirm that the script triggers a segfault during module shutdown with current master (64a51893). (gdb) bt #0 0x00007ffff6cf53d7 in kill () at ../sysdeps/unix/syscall-template.S:81 #1 0x00000000006e6d27 in zend_mm_panic ( message=0x99270d "zend_mm_heap corrupted") at /home/cmb/php-src/Zend/zend_alloc.c:357 #2 0x00000000006e897b in zend_mm_free_heap (heap=0x7ffff6800040, ptr=0x7ffff685e910, __zend_filename=0x8ed280 "/home/cmb/php-src/Zend/zend_string.h", __zend_lineno=271, __zend_orig_filename=0x0, __zend_orig_lineno=0) at /home/cmb/php-src/Zend/zend_alloc.c:1386 #3 0x00000000006ead4d in _efree (ptr=0x7ffff685e910, __zend_filename=0x8ed280 "/home/cmb/php-src/Zend/zend_string.h", __zend_lineno=271, __zend_orig_filename=0x0, __zend_orig_lineno=0) at /home/cmb/php-src/Zend/zend_alloc.c:2371 #4 0x00000000005a09e5 in zend_string_release (s=0x7ffff685e910) at /home/cmb/php-src/Zend/zend_string.h:271 #5 0x00000000005a481b in cls_method_dtor (el=0xcfdeb0) at /home/cmb/php-src/ext/pdo/pdo_dbh.c:1259 #6 0x000000000072f161 in zend_hash_destroy (ht=0xcfde10) at /home/cmb/php-src/Zend/zend_hash.c:1179 #7 0x00000000005a594a in dbh_free (dbh=0xcebe20, free_persistent=1 '\001') at /home/cmb/php-src/ext/pdo/pdo_dbh.c:1529 #8 0x00000000005a5bcc in php_pdo_pdbh_dtor (res=0xcfdc70) at /home/cmb/php-src/ext/pdo/pdo_dbh.c:1574 #9 0x0000000000732a84 in plist_entry_destructor (zv=0x7fffffffe370) at /home/cmb/php-src/Zend/zend_list.c:202 #10 0x000000000072e844 in _zend_hash_del_el_ex ( ht=0xc3b8d0 <executor_globals+592>, idx=0, p=0xcfdd00, prev=0x0) at /home/cmb/php-src/Zend/zend_hash.c:935 #11 0x000000000072e924 in _zend_hash_del_el ( ht=0xc3b8d0 <executor_globals+592>, idx=0, p=0xcfdd00) at /home/cmb/php-src/Zend/zend_hash.c:959 #12 0x000000000072fb42 in zend_hash_graceful_reverse_destroy ( ht=0xc3b8d0 <executor_globals+592>) at /home/cmb/php-src/Zend/zend_hash.c:1405 #13 0x0000000000732b8a in zend_destroy_rsrc_list ( ht=0xc3b8d0 <executor_globals+592>) at /home/cmb/php-src/Zend/zend_list.c:244 #14 0x0000000000719e95 in zend_shutdown () at /home/cmb/php-src/Zend/zend.c:816 #15 0x0000000000696b5c in php_module_shutdown () at /home/cmb/php-src/main/main.c:2343 #16 0x00000000007d3a17 in main (argc=2, argv=0xc3f960) at /home/cmb/php-src/sapi/cli/php_cli.c:1353