Bug #76301 [NEW]: Memory leak on Exception

From: volodymyr at wildwolf dot name Operating system: Ubuntu 17.04 x64 PHP version: 7.1.17 Package: Unknown/Other Function Bug Type: Bug Bug description:Memory leak on Exception Description: ------------ A simple PHPUnit test case: ``` class LeakTest extends \PHPUnit\Framework\TestCase { /** * @expectedException \RuntimeException */ public function testLeak() { throw new \RuntimeException(); } } ``` leaks when run under Valgrind: USE_ZEND_ALLOC=0 valgrind --leak-check=full $(phpenv which php) ./phpunit (phpunit runs PHPUnit\TextUI\Command::main(false) to ensure clean shutdown without exit()). Tested this on 7.1.17 (ZTS/NTS, DEBUG/Release) * release versions (ZTS and NTS) leak; * debug versions (ie, built with --enable-debug) do NOT leak. Test script: --------------- https://github.com/sjinks/php-memory-leak-on-exception Expected result: ---------------- $ USE_ZEND_ALLOC=0 valgrind --leak-check=full $(phpenv which php) ./phpunit ==13709== Memcheck, a memory error detector ==13709== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al. ==13709== Using Valgrind-3.13.0 and LibVEX; rerun with -h for copyright info ==13709== Command: /home/volodymyr/.phpenv/versions/7.1.17-zts-debug/bin/php ./phpunit ==13709== PHPUnit 7.1.5 by Sebastian Bergmann and contributors. Runtime: PHP 7.1.17 Configuration: /home/volodymyr/work/github/php-leaks/phpunit.xml . 1 / 1 (100%) Time: 2.6 seconds, Memory: 0.00MB OK (1 test, 1 assertion) OK ==13709== ==13709== HEAP SUMMARY: ==13709== in use at exit: 5,519 bytes in 41 blocks ==13709== total heap usage: 111,228 allocs, 111,187 frees, 18,208,664 bytes allocated ==13709== ==13709== LEAK SUMMARY: ==13709== definitely lost: 0 bytes in 0 blocks ==13709== indirectly lost: 0 bytes in 0 blocks ==13709== possibly lost: 0 bytes in 0 blocks ==13709== still reachable: 5,519 bytes in 41 blocks ==13709== suppressed: 0 bytes in 0 blocks ==13709== Reachable blocks (those to which a pointer was found) are not shown. ==13709== To see them, rerun with: --leak-check=full --show-leak-kinds=all ==13709== ==13709== For counts of detected and suppressed errors, rerun with: -v ==13709== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0) Actual result: -------------- $ USE_ZEND_ALLOC=0 valgrind --leak-check=full $(phpenv which php) ./phpunit ==13677== Memcheck, a memory error detector ==13677== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al. ==13677== Using Valgrind-3.13.0 and LibVEX; rerun with -h for copyright info ==13677== Command: /home/volodymyr/.phpenv/versions/7.1.17-zts-release/bin/php ./phpunit ==13677== PHPUnit 7.1.5 by Sebastian Bergmann and contributors. Runtime: PHP 7.1.17 Configuration: /home/volodymyr/work/github/php-leaks/phpunit.xml . 1 / 1 (100%) Time: 1.27 seconds, Memory: 0.00MB OK (1 test, 1 assertion) OK ==13677== ==13677== HEAP SUMMARY: ==13677== in use at exit: 1,774 bytes in 33 blocks ==13677== total heap usage: 81,556 allocs, 81,523 frees, 14,308,544 bytes allocated ==13677== ==13677== 72 bytes in 1 blocks are definitely lost in loss record 29 of 33 ==13677== at 0x4C2FB0F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==13677== by 0x69DB58: __zend_malloc (zend_alloc.c:2838) ==13677== by 0x70C5F7: zend_objects_new (zend_objects.c:171) ==13677== by 0x6D1DE0: _object_and_properties_init (zend_API.c:1295) ==13677== by 0x77ADD5: ZEND_NEW_SPEC_UNUSED_HANDLER (zend_vm_execute.h:27938) ==13677== by 0x71D4A2: execute_ex (zend_vm_execute.h:429) ==13677== by 0x781334: zend_execute (zend_vm_execute.h:474) ==13677== by 0x6CEED1: zend_execute_scripts (zend.c:1482) ==13677== by 0x65C8EF: php_execute_script (main.c:2577) ==13677== by 0x783935: do_cli (php_cli.c:993) ==13677== by 0x250652: main (php_cli.c:1381) ==13677== ==13677== LEAK SUMMARY: ==13677== definitely lost: 72 bytes in 1 blocks ==13677== indirectly lost: 0 bytes in 0 blocks ==13677== possibly lost: 0 bytes in 0 blocks ==13677== still reachable: 1,702 bytes in 32 blocks ==13677== suppressed: 0 bytes in 0 blocks ==13677== Reachable blocks (those to which a pointer was found) are not shown. ==13677== To see them, rerun with: --leak-check=full --show-leak-kinds=all ==13677== ==13677== For counts of detected and suppressed errors, rerun with: -v ==13677== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0) -- Edit bug report at https://bugs.php.net/bug.php?id=76301&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=76301&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=76301&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=76301&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=76301&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=76301&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=76301&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=76301&r=needscript Try newer version: https://bugs.php.net/fix.php?id=76301&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=76301&r=support Expected behavior: https://bugs.php.net/fix.php?id=76301&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=76301&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=76301&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=76301&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=76301&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=76301&r=dst IIS Stability: https://bugs.php.net/fix.php?id=76301&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=76301&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=76301&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=76301&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=76301&r=mysqlcfg