# CALL and SWITCH executors segfault - Thread: https://externals.io/message/16615 - Original archive: https://news-web.php.net/php.internals/16615 - Started by Sebastian Bergmann on 2005-06-12T20:48:42+00:00 - Messages: 4 - Reply by email to internals@lists.php.net - More for agents: search with https://externals.io/search.md?q={query} · JSON API at https://externals.io/api · documentation at https://externals.io/llms.txt --- ## #16615 — Sebastian Bergmann — 2005-06-12T20:48:42+00:00 URL: https://externals.io/message/16615#16615 Tonight I wanted to do some benchmarks with PHP 4.3.11, PHP 5.0.4, and the three (CALL, GOTO, SWITCH) executors of PHP 5.1 with both GCC 3.4.4 and GCC 4.0.1 to get a feeling for the improvements in the VM for PHP 5.1. Both the CALL and SWITCH executors segfault for me on my Linux system when running the ZendEngine2/bench.php script. Below is the backtrace for the GOTO executor: (gdb) r Zend/bench.php Starting program: /usr/local/src/php/php-5.1/sapi/cli/php Zend/bench.php simple 0.294 simplecall 0.778 simpleucall 1.147 simpleudcall 1.379 mandel 1.223 mandel2 1.494 Program received signal SIGSEGV, Segmentation fault. execute (op_array=0x826ffe0) at zend_vm_execute.h:3834 3834 memset(EX(CVs), 0, sizeof(zval**) * op_array->last_var); (gdb) bt #0 execute (op_array=0x826ffe0) at zend_vm_execute.h:3834 #1 0x0816d534 in execute (op_array=0x812dcc0) at zend_vm_execute.h:3989 . . . #871 0x0816d534 in execute (op_array=0x8285194) at zend_vm_execute.h:3989 #872 0x0812fa34 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /usr/local/src/php/php-5.1/Zend/zend.c:1077 #873 0x080ecb4d in php_execute_script (primary_file=0xbffff7a0) at /usr/local/src/php/php-5.1/main/main.c:1670 #874 0x081d3b4a in main (argc=2, argv=0xbffff874) at /usr/local/src/php/php-5.1/sapi/cli/php_cli.c:1036 Below is the backtrace for the SWITCH executor: (gdb) r Zend/bench.php Starting program: /usr/local/src/php/php-5.1/sapi/cli/php Zend/bench.php simple 0.316 simplecall 0.779 simpleucall 1.170 simpleudcall 1.389 mandel 1.384 mandel2 1.630 Program received signal SIGSEGV, Segmentation fault. execute (op_array=0x8273fe0) at zend_vm_execute.h:53 53 memset(EX(CVs), 0, sizeof(zval**) * op_array->last_var); (gdb) bt #0 execute (op_array=0x8273fe0) at zend_vm_execute.h:53 #1 0x0816f7b8 in execute (op_array=0x812dcc0) at zend_vm_execute.h:211 . . . #875 0x0816f7b8 in execute (op_array=0x8289194) at zend_vm_execute.h:211 #876 0x0812fa34 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /usr/local/src/php/php-5.1/Zend/zend.c:1077 #877 0x080ecb4d in php_execute_script (primary_file=0xbffff7a0) at /usr/local/src/php/php-5.1/main/main.c:1670 #878 0x081d464a in main (argc=2, argv=0xbffff874) at /usr/local/src/php/php-5.1/sapi/cli/php_cli.c:1036 -- Sebastian Bergmann http://www.sebastian-bergmann.de/ GnuPG Key: 0xB85B5D69 / 27A7 2B14 09E4 98CD 6277 0E5B 6867 C514 B85B 5D69 --- ## #16618 — Sebastian Bergmann — 2005-06-13T06:55:01+00:00 URL: https://externals.io/message/16615#16618 · In reply to: #16615 Sebastian Bergmann wrote: > Tonight I wanted to do some benchmarks with PHP 4.3.11, PHP 5.0.4, and > the three (CALL, GOTO, SWITCH) executors of PHP 5.1 with both GCC 3.4.4 > and GCC 4.0.1 to get a feeling for the improvements in the VM for > PHP 5.1. Initial results are here [1]. > Both the CALL and SWITCH executors segfault for me on my Linux system > when running the ZendEngine2/bench.php script. The benchmark part that causes the segfault in both cases is the Ackermann function. -- [1] http://sebastian-bergmann.de/stuff/benchmark.txt -- Sebastian Bergmann http://www.sebastian-bergmann.de/ GnuPG Key: 0xB85B5D69 / 27A7 2B14 09E4 98CD 6277 0E5B 6867 C514 B85B 5D69 --- ## #16619 — Dmitry Stogov — 2005-06-13T06:58:49+00:00 URL: https://externals.io/message/16615#16619 · In reply to: #16615 Hi Sebastian, The problem in stack overflow. We will see how this can be fixed without performance lost. Do you use x86 (non x86-64)? What is your ./configure options? Thanks. Dmitry. > -----Original Message----- > From: news [mailto:news@sea.gmane.org] On Behalf Of Sebastian Bergmann > Sent: Monday, June 13, 2005 12:49 AM > To: internals@lists.php.net > Subject: [PHP-DEV] CALL and SWITCH executors segfault > > > Tonight I wanted to do some benchmarks with PHP 4.3.11, PHP > 5.0.4, and the three (CALL, GOTO, SWITCH) executors of PHP > 5.1 with both GCC 3.4.4 and GCC 4.0.1 to get a feeling for > the improvements in the VM for PHP 5.1. > > Both the CALL and SWITCH executors segfault for me on my > Linux system when running the ZendEngine2/bench.php script. > > Below is the backtrace for the GOTO executor: > > (gdb) r Zend/bench.php > Starting program: /usr/local/src/php/php-5.1/sapi/cli/php > Zend/bench.php > simple 0.294 > simplecall 0.778 > simpleucall 1.147 > simpleudcall 1.379 > mandel 1.223 > mandel2 1.494 > > Program received signal SIGSEGV, Segmentation fault. > execute (op_array=0x826ffe0) at zend_vm_execute.h:3834 > 3834 memset(EX(CVs), 0, sizeof(zval**) * > op_array->last_var); > (gdb) bt > #0 execute (op_array=0x826ffe0) at zend_vm_execute.h:3834 > #1 0x0816d534 in execute (op_array=0x812dcc0) at > zend_vm_execute.h:3989 . . . #871 0x0816d534 in execute > (op_array=0x8285194) at zend_vm_execute.h:3989 #872 > 0x0812fa34 in zend_execute_scripts (type=8, retval=0x0, file_count=3) > at /usr/local/src/php/php-5.1/Zend/zend.c:1077 > #873 0x080ecb4d in php_execute_script (primary_file=0xbffff7a0) > at /usr/local/src/php/php-5.1/main/main.c:1670 > > #874 0x081d3b4a in main (argc=2, argv=0xbffff874) > at /usr/local/src/php/php-5.1/sapi/cli/php_cli.c:1036 > > Below is the backtrace for the SWITCH executor: > > (gdb) r Zend/bench.php > Starting program: /usr/local/src/php/php-5.1/sapi/cli/php > Zend/bench.php > simple 0.316 > simplecall 0.779 > simpleucall 1.170 > simpleudcall 1.389 > mandel 1.384 > mandel2 1.630 > > Program received signal SIGSEGV, Segmentation fault. > execute (op_array=0x8273fe0) at zend_vm_execute.h:53 > 53 memset(EX(CVs), 0, sizeof(zval**) * > op_array->last_var); > (gdb) bt > #0 execute (op_array=0x8273fe0) at zend_vm_execute.h:53 > #1 0x0816f7b8 in execute (op_array=0x812dcc0) at > zend_vm_execute.h:211 . . . #875 0x0816f7b8 in execute > (op_array=0x8289194) at zend_vm_execute.h:211 #876 0x0812fa34 > in zend_execute_scripts (type=8, retval=0x0, file_count=3) at > /usr/local/src/php/php-5.1/Zend/zend.c:1077 > #877 0x080ecb4d in php_execute_script > (primary_file=0xbffff7a0) at > /usr/local/src/php/php-5.1/main/main.c:1670 > #878 0x081d464a in main (argc=2, argv=0xbffff874) at > /usr/local/src/php/php-5.1/sapi/cli/php_cli.c:1036 > > -- > Sebastian Bergmann > http://www.sebastian-bergmann.de/ > GnuPG Key: 0xB85B5D69 / 27A7 2B14 09E4 98CD 6277 0E5B 6867 > C514 B85B 5D69 --- ## #16621 — Sebastian Bergmann — 2005-06-13T07:01:01+00:00 URL: https://externals.io/message/16615#16621 · In reply to: #16619 Dmitry Stogov wrote: > Do you use x86 (non x86-64)? > What is your ./configure options? Intel(R) Pentium(R) M Processor 1500MHz / 1024 KB Cache / 512 MB RAM Linux 2.6.11-gentoo-r11 CFLAGS="-march=pentium-m -O2 -pipe" ./configure --disable-cgi --disable-all -- Sebastian Bergmann http://www.sebastian-bergmann.de/ GnuPG Key: 0xB85B5D69 / 27A7 2B14 09E4 98CD 6277 0E5B 6867 C514 B85B 5D69