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Date: Wed, 11 Nov 2015 23:14:37 +0300
Message-ID: <CA+9eiLuZY8GN+P4GpA1_OHCXKubMib=0cpyqsJuAyPZFfJ11YA@mail.gmail.com>
To: "Frank M. Kromann" <fmk@webbypixel.com>
Cc: Anatol Belski <anatol.php@belski.net>, PHP Internals <internals@lists.php.net>
Content-Type: multipart/alternative; boundary=001a113f96fcc166210524497960
Subject: Re: [PHP-DEV] PHP 7 Segmentation fault
From: dmitry@zend.com (Dmitry Stogov)

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Content-Type: text/plain; charset=UTF-8

try to run the same script with valgrind.

USE_ZEND_ALLOC=0 valgrind --db-attach=yes php test.php

(it is 10 times slower)

Show the first reported problem.

Thanks. Dmitry.

On Wed, Nov 11, 2015 at 10:51 PM, Frank M. Kromann <fmk@webbypixel.com>
wrote:

> Just switched to PHP-7.0 and there is no longer any references to
> _live_range but the problem with the segfault is still there. Here is a new
> backtrace.
>
> #0  zend_mm_alloc_small (size=<optimized out>, bin_num=<optimized out>,
> heap=<optimized out>) at /home/frank/Source/php-src-7/Zend/zend_alloc.c:1291
> #1  zend_mm_alloc_heap (size=<optimized out>, heap=<optimized out>) at
> /home/frank/Source/php-src-7/Zend/zend_alloc.c:1358
> #2  _emalloc (size=2) at
> /home/frank/Source/php-src-7/Zend/zend_alloc.c:2442
> #3  0x00000000007e724d in _safe_emalloc (nmemb=nmemb@entry=24,
> size=<optimized out>, offset=offset@entry=0) at
> /home/frank/Source/php-src-7/Zend/zend_alloc.c:2510
> #4  0x00000000007f0b93 in zend_compile_params (ast=ast@entry=0x7ffff0ab7250,
> return_type_ast=return_type_ast@entry=0x0) at
> /home/frank/Source/php-src-7/Zend/zend_compile.c:4429
> #5  0x00000000007fa240 in zend_compile_func_decl (result=result@entry=0x0,
> ast=ast@entry=0x7ffff0ab7668) at
> /home/frank/Source/php-src-7/Zend/zend_compile.c:4879
> #6  0x00000000007f799a in zend_compile_stmt (ast=0x7ffff0ab7668) at
> /home/frank/Source/php-src-7/Zend/zend_compile.c:7048
> #7  0x00000000007f8487 in zend_compile_stmt_list (ast=ast@entry=0x7ffff0ab8388)
> at /home/frank/Source/php-src-7/Zend/zend_compile.c:4347
> #8  0x00000000007f781e in zend_compile_stmt (ast=ast@entry=0x7ffff0ab8388)
> at /home/frank/Source/php-src-7/Zend/zend_compile.c:6992
> #9  0x00000000007f88bf in zend_compile_class_decl (ast=ast@entry=0x7ffff0ab8720)
> at /home/frank/Source/php-src-7/Zend/zend_compile.c:5289
> #10 0x00000000007f7938 in zend_compile_stmt (ast=ast@entry=0x7ffff0ab8720)
> at /home/frank/Source/php-src-7/Zend/zend_compile.c:7060
> #11 0x00000000007fa67a in zend_compile_top_stmt (ast=0x7ffff0ab8720) at
> /home/frank/Source/php-src-7/Zend/zend_compile.c:6966
> #12 0x00000000007fa6bf in zend_compile_top_stmt (ast=0x7ffff0ab4018) at
> /home/frank/Source/php-src-7/Zend/zend_compile.c:6961
> #13 0x00000000007cde07 in compile_file (file_handle=<optimized out>,
> type=<optimized out>) at Zend/zend_language_scanner.l:607
> #14 0x000000000065434e in phar_compile_file (file_handle=<optimized out>,
> type=<optimized out>) at /home/frank/Source/php-src-7/ext/phar/phar.c:3311
> #15 0x00000000007cdf35 in compile_filename (type=2, filename=filename@entry=0x7ffff0a14550)
> at Zend/zend_language_scanner.l:647
> #16 0x0000000000899a2f in ZEND_INCLUDE_OR_EVAL_SPEC_CV_HANDLER () at
> /home/frank/Source/php-src-7/Zend/zend_vm_execute.h:29114
> #17 0x000000000084cecb in execute_ex (ex=<optimized out>) at
> /home/frank/Source/php-src-7/Zend/zend_vm_execute.h:414
> #18 0x00000000007fe607 in zend_call_function (fci=0x7ffff0a89aa0, fci@entry=0x7fffffffa8f0,
> fci_cache=fci_cache@entry=0x7fffffffa8c0)
>     at /home/frank/Source/php-src-7/Zend/zend_execute_API.c:854
> #19 0x000000000082b244 in zend_call_method (object=0x7ffff0aa38d8,
> obj_ce=<optimized out>, fn_proxy=<optimized out>,
>     function_name=0x7ffff0aaf108
> "composer\\autoload\\classloader::loadclass\001",
> function_name_len=<optimized out>, retval_ptr=retval_ptr@entry=0x0,
>     param_count=param_count@entry=1, arg1=0x7ffff0a14430, arg2=arg2@entry=0x0)
> at /home/frank/Source/php-src-7/Zend/zend_interfaces.c:104
> #20 0x00000000006c1324 in zif_spl_autoload_call (execute_data=<optimized
> out>, return_value=<optimized out>) at
> /home/frank/Source/php-src-7/ext/spl/php_spl.c:425
> #21 0x00000000007fe6a0 in zend_call_function (fci=fci@entry=0x7fffffffab40,
> fci_cache=fci_cache@entry=0x7fffffffab10) at
> /home/frank/Source/php-src-7/Zend/zend_execute_API.c:873
> #22 0x00000000007feec9 in zend_lookup_class_ex (name=name@entry=0x7ffff0a55e80,
> key=0x7ffff0a70420, use_autoload=use_autoload@entry=1)
>     at /home/frank/Source/php-src-7/Zend/zend_execute_API.c:1036
> #23 0x00000000007ffa18 in zend_fetch_class_by_name
> (class_name=0x7ffff0a55e80, key=<optimized out>, fetch_type=fetch_type@entry
> =512)
>     at /home/frank/Source/php-src-7/Zend/zend_execute_API.c:1383
> #24 0x000000000089af51 in ZEND_NEW_SPEC_CONST_HANDLER () at
> /home/frank/Source/php-src-7/Zend/zend_vm_execute.h:3354
> #25 0x000000000084cecb in execute_ex (ex=<optimized out>) at
> /home/frank/Source/php-src-7/Zend/zend_vm_execute.h:414
> #26 0x000000000089d969 in zend_execute (op_array=<optimized out>,
> return_value=<optimized out>) at
> /home/frank/Source/php-src-7/Zend/zend_vm_execute.h:458
> #27 0x000000000080db37 in zend_execute_scripts (type=type@entry=8,
> retval=retval@entry=0x0, file_count=file_count@entry=3) at
> /home/frank/Source/php-src-7/Zend/zend.c:1428
> #28 0x00000000007a2ae0 in php_execute_script
> (primary_file=primary_file@entry=0x7fffffffd070) at
> /home/frank/Source/php-src-7/main/main.c:2471
> #29 0x000000000089f78a in do_cli (argc=4, argv=0x1167c60) at
> /home/frank/Source/php-src-7/sapi/cli/php_cli.c:974
> #30 0x0000000000443467 in main (argc=4, argv=0x1167c60) at
> /home/frank/Source/php-src-7/sapi/cli/php_cli.c:1345
>
> - Frank
>
>
> On 11/11/15 11:40, Frank M. Kromann wrote:
>
> Hi Anatol,
>
> Sorry, I fogot to include the output of the grep.
>
> [frank@dev php-src-7]$ grep -rn _live_range  Zend/
> Zend/zend_opcode.c:83:    op_array->last_live_range = 0;
> Zend/zend_compile.h:176:typedef struct _zend_live_range {
> Zend/zend_compile.h:179:} zend_live_range;
> Zend/zend_compile.h:364:    int last_live_range;
> Zend/zend_compile.h:366:    zend_live_range *live_range;
> Zend/zend_compile.c:579:static uint32_t
> zend_start_live_range(zend_op_array *op_array, uint32_t start) /* {{{ */
> Zend/zend_compile.c:581:    zend_live_range *range;
> Zend/zend_compile.c:583:    op_array->last_live_range++;
> Zend/zend_compile.c:584:    op_array->live_range =
> erealloc(op_array->live_range, sizeof(zend_live_range) *
> op_array->last_live_range);
> Zend/zend_compile.c:585:    range = op_array->live_range +
> op_array->last_live_range - 1;
> Zend/zend_compile.c:587:    return op_array->last_live_range - 1;
> Zend/zend_compile.c:591:static void zend_end_live_range(zend_op_array
> *op_array, uint32_t offset, uint32_t end) /* {{{ */
> Zend/zend_compile.c:593:    zend_live_range *range = op_array->live_range
> + offset;
> Zend/zend_compile.c:595:    if (range->start == end && offset ==
> op_array->last_live_range - 1) {
> Zend/zend_compile.c:596:        op_array->last_live_range--;
> Zend/zend_compile.c:619:        info.u.live_range_offset =
> zend_start_live_range(CG(active_op_array), start);
> Zend/zend_compile.c:643: zend_end_live_range(CG(active_op_array),
> loop_var->u.live_range_offset, end);
> Zend/zend_compile.c:6472:    range =
> zend_start_live_range(CG(active_op_array),
> get_next_op_number(CG(active_op_array)));
> Zend/zend_compile.c:6485: zend_end_live_range(CG(active_op_array), range,
> get_next_op_number(CG(active_op_array)));
> Zend/zend_compile.c:6807:        uint32_t range =
> zend_start_live_range(CG(active_op_array), rope_init_lineno);
> Zend/zend_compile.c:6822: zend_end_live_range(CG(active_op_array), range,
> opline - CG(active_op_array)->opcodes);
> Zend/zend_execute.c:2552:    for (i = 0; i <
> EX(func)->op_array.last_live_range; i++) {
> Zend/zend_execute.c:2553:        const zend_live_range *range =
> &EX(func)->op_array.live_range[i];
>
>
> - Frank
>
> On 11/11/15 11:38, Frank M. Kromann wrote:
>
> Hi Anatol,
>
> Here is what I have
>
> [frank@dev php-src-7]$ git show
> commit d1077f7a897d9267a0cad3d64663fd952dd1c6b2
> Merge: e88e3f2 a2e59e7
> Author: Anatol Belski <ab@php.net> <ab@php.net>
> Date:   Wed Nov 11 16:35:07 2015 +0100
>
>     Merge branch 'PHP-7.0'
>
>     * PHP-7.0:
>       fix format macro names in UPGRADING.INTERNALS
>
> [frank@dev php-src-7]$ git status
> # On branch master
> # Untracked files:
>
> I think that is the latest from git.php.net?
>
> - Frank
>
> On 11/11/15 11:34, Anatol Belski wrote:
>
> Hi Frank,
>
> -----Original Message-----
> From: Frank M. Kromann [mailto:fmk@php.net <fmk@php.net>]
> Sent: Wednesday, November 11, 2015 8:14 PM
> To: Dmitry Stogov <dmitry@zend.com> <dmitry@zend.com>
> Cc: PHP Internals <internals@lists.php.net> <internals@lists.php.net>
> Subject: Re: [PHP-DEV] PHP 7 Segmentation fault
>
> Hi Dmitry,
>
> Yes this is the master branch. I have previously tested it on the
> PHP-7.0 branch with the same result. I will do that again to verify that
> the
> problem is the same.
>
> I run vcsclean, buildconf, configure, make at least once a day. I do not
> run the
> make install as that will break all the sites on my dev box. I'm just
> testing the
> new binary with a command line script.
>
> I just did all the steps above and the result is still the same. I'll try
> to create a
> small script that can be used to reproduce the problem, but it might be
> tricky as
> it seems to have to do with the number of autoloaded classes, a problem
> with
> my PHP code (although PHP should not seg fault in that case).
>
> I've just checked for zend_add_live_range - it's even not in the current
> master. Also ` grep -rn _live_range  Zend/` finds nothing in PHP-7.0. Could
> you please check that you're using up-to-date source tree and the correct
> branch? It could be pretty much like something in that direction.
>
> Thanks
>
>
>
>
> --
> Frank M. Kromann, M.Sc.E.E.
> Web by Pixel, Inc.
>
> Phone: +1 949 742 7533
> Fax: +1 949 742 7534
> Cell: +1 949 702 1794
> Denmark: +45 78 79 11 48
>
> Web: http://webbypixel.com
>

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