Edit report at https://bugs.php.net/bug.php?id=52752&edit=1
ID: 52752
Comment by: jani dot ollikainen at mmd dot net
Reported by: paulgao at yeah dot net
Summary: Crash when lexing
Status: Open
Type: Bug
Package: Scripting Engine problem
Operating System: Centos 5 32bit
PHP Version: 5.3SVN-2010-08-31 (SVN)
Block user comment: N
Private report: N
New Comment:
Hi,
After emailing to php-dev and fixing my code I've got rid of the error.
Problem is that I've thought that PHP will handle concurrent stuff so
I don't need to.
My problem was having code that does something like this:
fopen($fp,"file.php");
fputs($fp,"<?php /*code*/ ?>");
fclose($fp);
And also in other parts of code to have:
include("file.php");
Which caused sometimes the include have a broken file. I still think that
crashing to broken file is not acceptable behavior, but I've understood that
you can crash PHP by coding something wrong and PHP doesn't protect you or
crash nicely. Which can be problem in hosted environment if not running basic
PHP-CGI for every request.
I think include/require documentation should have warning box saying something
that you have to handle concurrent stuff and/or PHP can crash to broken PHP
files without nice error. I think that might helped me.
For the fix in my code was to change my writing to file:
fopen($fp,"file.php.tmp.".getmypid());
fputs($fp,"<?php /*code*/ ?>");
fclose($fp);
rename("file.php.tmp.".getmypid(),"file.php");
Pretty easy fix if you know that you have to do it or expect PHP to crash to
broken files.
Of course I can't say anything about the other crashes, but as the backtraces
seem similar and the example code to used to crash PHP has similar problem
might that help.
Previous Comments:
------------------------------------------------------------------------
[2012-12-19 13:17:52] jani dot ollikainen at mmd dot net
Oh and here's the backtraces for the production enviroment using PHP 5.3.3, APC
3.1.13 on CentOS 6 (x86_64). Backtrace have two options but still problem seems
to be the same:
Core was generated by `/usr/bin/php-cgi'.
Program terminated with signal 7, Bus error.
#0 lex_scan (zendlval=0x7fff2f98cf48) at Zend/zend_language_scanner.c:931
931 if (yych != '<') goto yy4;
(gdb) list
926 };
927
928 YYDEBUG(0, *YYCURSOR);
929 YYFILL(8);
930 yych = *YYCURSOR;
931 if (yych != '<') goto yy4;
932 YYDEBUG(2, *YYCURSOR);
933 yyaccept = 0;
934 yych = *(YYMARKER = ++YYCURSOR);
935 if (yych <= '?') {
(gdb) bt
#0 lex_scan (zendlval=0x7fff901eca58) at Zend/zend_language_scanner.c:931
#1 0x000000000058deb0 in zendlex (zendlval=0x7fff901eca50)
at /usr/src/debug/php-5.3.3/Zend/zend_compile.c:4942
#2 0x00000000005786f7 in zendparse ()
at /usr/src/debug/php-5.3.3/Zend/zend_language_parser.c:3282
#3 0x0000000000583342 in compile_file (file_handle=0x7fff901edfe0,
type=<value optimized out>) at Zend/zend_language_scanner.l:354
#4 0x00007f413988da8f in my_compile_file (h=0x7fff901edfe0, type=2)
at /usr/src/debug/php-pecl-apc-3.1.13/APC-3.1.13/apc_main.c:532
#5 0x00007f4134c64721 in phar_compile_file (file_handle=0x7fff901edfe0,
type=2) at /usr/src/debug/php-5.3.3/ext/phar/phar.c:3393
#6 0x00000000005d8148 in ZEND_INCLUDE_OR_EVAL_SPEC_TMP_HANDLER (
execute_data=0x1263560)
at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:5179
#7 0x00000000005cc810 in execute (op_array=0x11f5ce0)
at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:107
#8 0x00000000005a6f4d in zend_execute_scripts (type=8, retval=0x0,
file_count=3) at /usr/src/debug/php-5.3.3/Zend/zend.c:1194
#9 0x00000000005551b8 in php_execute_script (primary_file=0x7fff901f07b0)
at /usr/src/debug/php-5.3.3/main/main.c:2261
#10 0x000000000063081d in main (argc=1, argv=0x7fff901f29c8)
at /usr/src/debug/php-5.3.3/sapi/cgi/cgi_main.c:2127
(gdb) bt
#0 lex_scan (zendlval=0x7fffa8dc3898) at Zend/zend_language_scanner.c:931
#1 0x000000000058deb0 in zendlex (zendlval=0x7fffa8dc3890)
at /usr/src/debug/php-5.3.3/Zend/zend_compile.c:4942
#2 0x00000000005786f7 in zendparse ()
at /usr/src/debug/php-5.3.3/Zend/zend_language_parser.c:3282
#3 0x0000000000583342 in compile_file (file_handle=0x7fffa8dc5340,
type=<value optimized out>) at Zend/zend_language_scanner.l:354
#4 0x00007f55ee3c65b7 in apc_compile_cache_entry (key=0x7fffa8dc5170,
h=0x7fffa8dc5340, type=2, t=<value optimized out>,
op_array=0x7fffa8dc40b8, cache_entry=0x7fffa8dc40c0)
at /usr/src/debug/php-pecl-apc-3.1.13/APC-3.1.13/apc_main.c:398
#5 0x00007f55ee3c6f9b in my_compile_file (h=0x7fffa8dc5340, type=2)
at /usr/src/debug/php-pecl-apc-3.1.13/APC-3.1.13/apc_main.c:603
#6 0x00007f55e979d721 in phar_compile_file (file_handle=0x7fffa8dc5340,
type=2) at /usr/src/debug/php-5.3.3/ext/phar/phar.c:3393
#7 0x00000000005d8148 in ZEND_INCLUDE_OR_EVAL_SPEC_TMP_HANDLER (
execute_data=0x1e26370)
at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:5179
#8 0x00000000005cc810 in execute (op_array=0x1d187e0)
at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:107
#9 0x00000000005a6f4d in zend_execute_scripts (type=8, retval=0x0,
file_count=3) at /usr/src/debug/php-5.3.3/Zend/zend.c:1194
#10 0x00000000005551b8 in php_execute_script (primary_file=0x7fffa8dc7b10)
at /usr/src/debug/php-5.3.3/main/main.c:2261
#11 0x000000000063081d in main (argc=1, argv=0x7fffa8dc9d28)
at /usr/src/debug/php-5.3.3/sapi/cgi/cgi_main.c:2127
------------------------------------------------------------------------
[2012-12-19 13:09:36] jani dot ollikainen at mmd dot net
This problem is wider than the report says! It's not just Centos 5 and 32bit.
Tested with 5.3.19, 5.4.9 and trunk 201212191230 and got bus error.
Suggested workaround by disabling mmap seems to work, so problem lies
in mmap handling. Real fix/patch would be nice and really appreciated.
5.3.19:
Core was generated by `sapi/cli/php test3.php'.
Program terminated with signal 7, Bus error.
#0 lex_scan (zendlval=<value optimized out>)
at Zend/zend_language_scanner.l:1709
1709 switch (*YYCURSOR++) {
(gdb) list
1704 }
1705
1706
1707 <ST_IN_SCRIPTING>"#"|"//" {
1708 while (YYCURSOR < YYLIMIT) {
1709 switch (*YYCURSOR++) {
1710 case '\r':
1711 if (*YYCURSOR == '\n') {
1712 YYCURSOR++;
1713 }
#0 lex_scan (zendlval=<value optimized out>)
at Zend/zend_language_scanner.l:1709
#1 0x0000000000636640 in zendlex (zendlval=0x7fff2476cb90)
at /root/php-5.3.19/Zend/zend_compile.c:4975
#2 0x0000000000620e66 in zendparse ()
at /root/php-5.3.19/Zend/zend_language_parser.c:3285
#3 0x000000000062bb52 in compile_file (file_handle=0x7fff2476ce80,
type=<value optimized out>) at Zend/zend_language_scanner.l:364
#4 0x00000000005362d1 in phar_compile_file (file_handle=0x7fff2476ce80,
type=2) at /root/php-5.3.19/ext/phar/phar.c:3394
#5 0x000000000062b3de in compile_filename (type=2, filename=0x185ac58)
at Zend/zend_language_scanner.l:407
#6 0x000000000067c63e in ZEND_INCLUDE_OR_EVAL_SPEC_CONST_HANDLER (
execute_data=0x7fe9b5916050)
at /root/php-5.3.19/Zend/zend_vm_execute.h:1967
#7 0x0000000000675a30 in execute (op_array=0x184f358)
at /root/php-5.3.19/Zend/zend_vm_execute.h:107
#8 0x000000000064f86f in zend_execute_scripts (type=8, retval=0x0,
file_count=3) at /root/php-5.3.19/Zend/zend.c:1259
#9 0x00000000005fcd67 in php_execute_script (primary_file=0x7fff24770780)
at /root/php-5.3.19/main/main.c:2316
#10 0x00000000006da002 in main (argc=2, argv=0x7fff24770a18)
at /root/php-5.3.19/sapi/cli/php_cli.c:1189
PHP 5.4.9:
Core was generated by `sapi/cli/php test3.php'.
Program terminated with signal 7, Bus error.
#0 lex_scan (zendlval=<value optimized out>)
at Zend/zend_language_scanner.l:1904
1904 switch (*YYCURSOR++) {
(gdb) list
1899 }
1900
1901
1902 <ST_IN_SCRIPTING>"#"|"//" {
1903 while (YYCURSOR < YYLIMIT) {
1904 switch (*YYCURSOR++) {
1905 case '\r':
1906 if (*YYCURSOR == '\n') {
1907 YYCURSOR++;
1908 }
(gdb) bt
#0 lex_scan (zendlval=<value optimized out>)
at Zend/zend_language_scanner.l:1904
#1 0x000000000063fd90 in zendlex (zendlval=0x7fff4739ebf0)
at /root/php-5.4.9/Zend/zend_compile.c:6707
#2 0x0000000000628ba4 in zendparse ()
at /root/php-5.4.9/Zend/zend_language_parser.c:3430
#3 0x0000000000634d4d in compile_file (file_handle=0x7fff4739ef40,
type=<value optimized out>) at Zend/zend_language_scanner.l:582
#4 0x0000000000539ae1 in phar_compile_file (file_handle=0x7fff4739ef40,
type=2) at /root/php-5.4.9/ext/phar/phar.c:3388
#5 0x00000000006344ae in compile_filename (type=2, filename=0x7f66ed826d20)
at Zend/zend_language_scanner.l:625
#6 0x00000000006acb6b in ZEND_INCLUDE_OR_EVAL_SPEC_CONST_HANDLER (
execute_data=0x7f66ed7ea060) at /root/php-5.4.9/Zend/zend_vm_execute.h:2608
#7 0x00000000006c98a0 in execute (op_array=0x7f66ed81f938)
at /root/php-5.4.9/Zend/zend_vm_execute.h:410
#8 0x00000000006608cd in zend_execute_scripts (type=8, retval=0x0,
file_count=3) at /root/php-5.4.9/Zend/zend.c:1309
#9 0x0000000000603e27 in php_execute_script (primary_file=0x7fff473a2680)
at /root/php-5.4.9/main/main.c:2482
#10 0x000000000070aeac in do_cli (argc=2, argv=0x7fff473a2a88)
at /root/php-5.4.9/sapi/cli/php_cli.c:988
#11 0x000000000070b608 in main (argc=2, argv=0x7fff473a2a88)
at /root/php-5.4.9/sapi/cli/php_cli.c:1364
trunk:
Core was generated by `sapi/cli/php test3.php'.
Program terminated with signal 7, Bus error.
#0 lex_scan (zendlval=<value optimized out>)
at Zend/zend_language_scanner.l:1917
1917 switch (*YYCURSOR++) {
(gdb) list
1912 }
1913
1914
1915 <ST_IN_SCRIPTING>"#"|"//" {
1916 while (YYCURSOR < YYLIMIT) {
1917 switch (*YYCURSOR++) {
1918 case '\r':
1919 if (*YYCURSOR == '\n') {
1920 YYCURSOR++;
1921 }
(gdb) bt
#0 lex_scan (zendlval=<value optimized out>)
at Zend/zend_language_scanner.l:1917
#1 0x0000000000641c30 in zendlex (zendlval=0x7fff34ca46c0)
at /root/php-trunk-201212191230/Zend/zend_compile.c:6881
#2 0x000000000062a713 in zendparse ()
at /root/php-trunk-201212191230/Zend/zend_language_parser.c:3428
#3 0x0000000000636d75 in compile_file (file_handle=0x7fff34ca4a30,
type=<value optimized out>) at Zend/zend_language_scanner.l:585
#4 0x000000000053a921 in phar_compile_file (file_handle=0x7fff34ca4a30,
type=2) at /root/php-trunk-201212191230/ext/phar/phar.c:3388
#5 0x000000000063641e in compile_filename (type=2, filename=0x7f6444584978)
at Zend/zend_language_scanner.l:628
#6 0x00000000006d48eb in ZEND_INCLUDE_OR_EVAL_SPEC_CONST_HANDLER (
execute_data=0x7f64445481e0)
at /root/php-trunk-201212191230/Zend/zend_vm_execute.h:2695
#7 0x00000000006d4b40 in execute_ex (execute_data=0x7f64445481e0)
at /root/php-trunk-201212191230/Zend/zend_vm_execute.h:356
#8 0x00000000006634d9 in zend_execute_scripts (type=8, retval=0x0,
file_count=3) at /root/php-trunk-201212191230/Zend/zend.c:1309
#9 0x0000000000605ed9 in php_execute_script (primary_file=0x7fff34ca8180)
at /root/php-trunk-201212191230/main/main.c:2468
#10 0x0000000000710d7c in do_cli (argc=2, argv=0x7fff34ca8588)
at /root/php-trunk-201212191230/sapi/cli/php_cli.c:988
#11 0x00000000007114d8 in main (argc=2, argv=0x7fff34ca8588)
at /root/php-trunk-201212191230/sapi/cli/php_cli.c:1364
------------------------------------------------------------------------
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