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Date: Tue, 02 Feb 2010 08:35:20 +0000
From: Andrew West <andrewwest AT gmail DOT com>
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To: cygwin AT cygwin DOT com
Subject: Re: dlclose not calling destructors of static variables.
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On 01/02/2010 22:44, Dave Korn wrote:
> On 01/02/2010 17:35, Andrew West wrote:
>
>    
>> But the atexit function is registered at 0x706c10f0. Changing
>> AllocationBase to BaseAddress worked for my test case out of pure luck,
>> with my larger libraries it still failed.
>>      
>    I've managed to convince myself it's right actually.
>
>    
>> Looking at one of the libraries in my code that fails I get ( with the
>> atexit at 0x78351c9 )
>>
>> remove_dll_atexit;
>> m.AllocationBase = 0x7820000
>> m.AllocationBase + m.RegionSize = 0x7824000
>>
>> GDB;
>> from = 0x07821000
>> to = 0x079159b8
>>      
>    Please post the output of "objdump -h" on this library.  (If there's no
> problem doing so, please send me a copy of the binary off-list.)
>
>      cheers,
>        DaveK
>
>
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>    
I've attached the objdump -h output. Looks like the library was 
relocated in memory, but if I do;

0x63940000 + (  0x78351c9 - 0x7820000 ) = 0x639551c9

Checking the assembly dump from objdump and the destructor is there at
0x6394632b, it's just a simple call to the base classes destructor. The 
only thing that might be of interest is that the base classes
destructor is in another shared library. Then again cygwin isn't even 
managing to call the original destructor so I can't see how that
might effect things.

Andy

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libeffect_loader_d.dll:     file format pei-i386

Sections:
Idx Name          Size      VMA       LMA       File off  Algn
  0 .text         00061380  63941000  63941000  00000600  2**4
                  CONTENTS, ALLOC, LOAD, CODE, DATA
  1 .data         000095a8  639a3000  639a3000  00061a00  2**5
                  CONTENTS, ALLOC, LOAD, DATA
  2 .rdata        00000010  639ad000  639ad000  0006b000  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  3 .eh_frame     0000015c  639ae000  639ae000  0006b200  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  4 .bss          00001540  639af000  639af000  00000000  2**3
                  ALLOC
  5 .edata        0007d0bf  639b1000  639b1000  0006b400  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  6 .idata        00003660  63a2f000  63a2f000  000e8600  2**2
                  CONTENTS, ALLOC, LOAD, DATA
  7 .reloc        000029b8  63a33000  63a33000  000ebe00  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  8 .debug_aranges 0000a748  63a36000  63a36000  000ee800  2**0
                  CONTENTS, READONLY, DEBUGGING
  9 .debug_pubnames 000d5737  63a41000  63a41000  000f9000  2**0
                  CONTENTS, READONLY, DEBUGGING
 10 .debug_info   002cfa26  63b17000  63b17000  001ce800  2**0
                  CONTENTS, READONLY, DEBUGGING
 11 .debug_abbrev 0000e136  63de7000  63de7000  0049e400  2**0
                  CONTENTS, READONLY, DEBUGGING
 12 .debug_line   0002872a  63df6000  63df6000  004ac600  2**0
                  CONTENTS, READONLY, DEBUGGING
 13 .debug_frame  0002632c  63e1f000  63e1f000  004d4e00  2**2
                  CONTENTS, READONLY, DEBUGGING
 14 .debug_str    0000bcb1  63e46000  63e46000  004fb200  2**0
                  CONTENTS, READONLY, DEBUGGING
 15 .debug_loc    00043d0d  63e52000  63e52000  00507000  2**0
                  CONTENTS, READONLY, DEBUGGING
 16 .debug_ranges 0000c628  63e96000  63e96000  0054ae00  2**0
                  CONTENTS, READONLY, DEBUGGING


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