Re: 64 bit platform improvements
| From: | Pierre Joye | Date: | Sat, 28 Dec 2013 15:10:36 +0000 |
| Subject: | Re: 64 bit platform improvements | ||
| References: | 1 2 3 4 5 6 7 8 9 | Groups: | php.windows |
| Request: | Send a blank email to php-windows+get-31229@lists.php.net to get a copy of this message | ||
On Sat, Dec 28, 2013 at 3:06 PM, Jan Ehrhardt <phpdev@ehrhardt.nl> wrote:
> "Anatol Belski" in php.windows (Thu, 26 Dec 2013 23:10:41 +0100):
>>Yeah, there is a page
>>https://bugs.php.net/bugs-generating-backtrace-win32.php ,
>>the debug tool
>>is in current version 2.0 now, but the screenshots are compatible.
>
> I am now getting this result with a x64 debug build:
>
> WARNING - DebugDiag was not able to locate debug symbols for
> \php5_debug.dll, so the information below may be incomplete.
>
> In
>
> php-cgi__PID__2664__Date__12_28_2013__Time_02_21_08PM__334__Second_Chance_Exception_C0000005.dmp
> the assembly instruction at php5_debug!gc_init+2687d in
> D:\phpdev\php57nts.x64d\php5_debug.dll from The PHP Group has caused an
> access violation exception (0xC0000005) when trying to read from memory
> location 0x00000000 on thread 0
>
> Strange thing: there was a php5_debug.pdb besides the php5_debug.dll. Am
> I missing something? The info does not go further than things like:
>
> php5_debug!gc_init+2687d
> php5_debug!gc_init+2684a
> php5_debug!gc_init+23c67
> php5_debug!gc_init+21488
> php5_debug!gc_init+1c658e
> php5_debug!gc_init+14868d
> php5_debug!gc_init+14a008
>
> There are a lot more files with info about php5_debug.dll than only the
> .pdb:
>
> 28/12/13 14:56 16.347.648 php5_debug.dll
> 28/12/13 14:48 32.697 php5_debug.dll.def
> 28/12/13 14:56 618 php5_debug.dll.manifest
> 28/12/13 14:51 1.132 php5_debug.dll.res
> 28/12/13 14:56 488.426 php5_debug.exp
> 28/12/13 14:56 7.497.392 php5_debug.ilk
> 28/12/13 14:56 806.446 php5_debug.lib
> 28/12/13 14:56 15.346.688 php5_debug.pdb
>
> Which one would be interesting for the debugdiag tool?
>
>>The issue with gdb is that it can debug only the corresponding builds (for
>>instance binaries compiled with gcc under mingw).
>
> Hmmm. GDB knew that it was zend_mm_set_custom_handlers in the DLL.
yes, as the symbol address is exposed.
Please use windbg, the way to create bt is explained on bugs.php.net.
Cheers,
--
Pierre
@pierrejoye | http://www.libgd.org