Bug #74526 [Opn->Dup]: Segfault generating phar.php

Edit report at https://bugs.php.net/bug.php?id=74526&edit=1 ID: 74526 Updated by: danack@php.net Reported by: coypu at sdf dot org Summary: Segfault generating phar.php -Status: Open +Status: Duplicate Type: Bug Package: Compile Failure Operating System: NetBSD PHP Version: 7.1.4 Block user comment: N Private report: N New Comment: Closing as a duplicate of https://bugs.php.net/bug.php?id=74527 Previous Comments: ------------------------------------------------------------------------ [2017-05-02 03:30:11] coypu at sdf dot org Description: ------------ Hi, NetBSD 7.0 i386 builds are consistently segfaulting generating phar.php Example build log: http://nyftp.netbsd.org/pub/pkgsrc/packages/reports/2017Q1/NetBSD-7.0-i386/20170430.0103/php-7.1.3nb1/build.log (Sorry for reporting a bug against 7.1.3, I didn't notice as I was experimenting, and this is in an extremely slow VM - I don't see relevant changes in 7.1.4) We have some local modifications to the package, you can view them here: https://github.com/NetBSD/pkgsrc/tree/trunk/lang/php71 (None of them touch deep PHP internals) A backtrace of such a segfault is: (gdb) core ./work/php-7.1.3/php.core [New process 1] Core was generated by `php'. Program terminated with signal SIGSEGV, Segmentation fault. #0 0x0857b17b in zval_get_type (pz=0x7ae11780) at /pkgsrc/lang/php71/work/php-7.1.3/Zend/zend_types.h:332 332 return pz->u1.v.type; (gdb) bt #0 0x0857b17b in zval_get_type (pz=0x7ae11780) at /pkgsrc/lang/php71/work/php-7.1.3/Zend/zend_types.h:332 #1 ZEND_UNSET_DIM_SPEC_CV_CONST_HANDLER () at /pkgsrc/lang/php71/work/php-7.1.3/Zend/zend_vm_execute.h:39969 #2 0x084f5b20 in execute_ex (ex=0xbb214020) at /pkgsrc/lang/php71/work/php-7.1.3/Zend/zend_vm_execute.h:429 #3 0x084f6237 in zend_execute (op_array=0xbb26d080, return_value=0x0) at /pkgsrc/lang/php71/work/php-7.1.3/Zend/zend_vm_execute.h:474 #4 0x0847b116 in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /pkgsrc/lang/php71/work/php-7.1.3/Zend/zend.c:1476 #5 0x083ec7e0 in php_execute_script (primary_file=0xbfbfdce0) at /pkgsrc/lang/php71/work/php-7.1.3/main/main.c:2537 #6 0x085c034c in do_cli (argc=14, argv=0xbfbfded8) at /pkgsrc/lang/php71/work/php-7.1.3/sapi/cli/php_cli.c:993 #7 0x085c1228 in main (argc=14, argv=0xbfbfded8) at /pkgsrc/lang/php71/work/php-7.1.3/sapi/cli/php_cli.c:1381 I personally attempted to build the package in qemu-system-i386, using GCC 4.8.5. I've made the following change that made me able to build it: --- configure.orig 2017-04-11 15:37:37.000000000 +0000 +++ configure @@ -5737,10 +5737,7 @@ if test "$ZEND_GCC_GLOBAL_REGS" != "no"; #else # define ZEND_GCC_VERSION 0 #endif -#if defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(i386) -# define ZEND_VM_FP_GLOBAL_REG "%esi" -# define ZEND_VM_IP_GLOBAL_REG "%edi" -#elif defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(__x86_64__) +#if defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(__x86_64__) # define ZEND_VM_FP_GLOBAL_REG "%r14" # define ZEND_VM_IP_GLOBAL_REG "%r15" #elif defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(__powerpc64__) Disabling the use of a global register for i386 (I think). I don't have a rationale for it, I just found it unbelievable that such a thing works, and disabling it did the trick. This may be a GCC bug if you believe it should work. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=74526&edit=1