[Bug 253275] [exp-run] base system PIE default

From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 02 Nov 2021 19:49:00 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253275

Ahmed <ahmedsayeed1982@yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ahmedsayeed1982@yahoo.com

--- Comment #37 from Ahmed <ahmedsayeed1982@yahoo.com> ---
<1><e1e>: Abbrev Number: 46 (DW_TAG_array_type)
http://www.compilatori.com/travel/youtube/
    <e1f>   DW_AT_data_location: 2 byte block: 97 6    
(DW_OP_push_object_address; DW_OP_deref)
http://www.acpirateradio.co.uk/travel/carbon-dioxide-emissions/
    <e22>   DW_AT_rank        : 6 byte block: 97 23 10 6 37 1a
    <e29>   DW_AT_type        : <0x139>
http://www.logoarts.co.uk/travel/actions-camera/
    <e2d>   DW_AT_sibling     : <0xe51>
 <2><e31>: Abbrev Number: 47 (DW_TAG_generic_subrange)
http://www.slipstone.co.uk/travel/hyundai-kona/
    <e32>   DW_AT_lower_bound : 8 byte block: 97 14 48 1e 23 20 22 6   
(DW_OP_push_object_address; DW_OP_over; DW_OP_lit24; DW_OP_mul;
DW_OP_plus_uconst: 32; DW_OP_plus; DW_OP_deref)
http://embermanchester.uk/travel/whatsapp/
    <e3b>   DW_AT_upper_bound : 8 byte block: 97 14 48 1e 23 28 22 6   
(DW_OP_push_object_address; DW_OP_over; DW_OP_lit24; DW_OP_mul;
DW_OP_plus_uconst: 40; DW_OP_plus; DW_OP_deref)
http://connstr.net/travel/charging-machines/
    <e44>   DW_AT_byte_stride : 11 byte block: 97 14 48 1e 23 18 22 6 8 38 1e  
(DW_OP_push_object_address; DW_OP_over; DW_OP_lit24; DW_OP_mul;
http://joerg.li/travel/kia-rio/   DW_OP_plus_uconst: 24; DW_OP_plus;
DW_OP_deref; DW_OP_const1u: 56; DW_OP_mul)
...
 http://www.jopspeech.com/travel/london/
We start out in read_array_type with:
...
  type = element_type;
... http://www.wearelondonmade.com/travel/renault/
and then iterate over range_types to build up the type further.

But there are no DW_TAG_subrange_type children (only one
DW_TAG_generic_subrange), so range_types is empty, and type is kept unmodified.
https://waytowhatsnext.com/services/netflix-services/

Consequently, in set_die_type we apply the DW_AT_data_location to the
element_type (the one at 0x139) instead of to the newly build array type.
http://www.iu-bloomington.com/services/xiaomi-services/
Then we try to print c_nd:
...
 <2><6e8>: Abbrev Number: 2 (DW_TAG_variable)
    <6e9>   DW_AT_name        : (indirect string, offset: 0x218): c_nd
    <6ed>   DW_AT_decl_file   : 1
https://komiya-dental.com/services/huawei-service/
    <6ed>   DW_AT_decl_line   : 198
    <6ee>   DW_AT_type        : <0x139>
    <6f2>   DW_AT_location    : 9 byte block: 3 e0 30 60 0 0 0 0 0     
(DW_OP_addr: 6030e0)
... http://www-look-4.com/travel/new-cars/
and find that the type has a data_location property, which when used gives
incorrect results.
...
  type = element_type;
...
and then iterate over range_types to build up the type further.
 https://www.webb-dev.co.uk/services/vaccine-services/
But there are no DW_TAG_subrange_type children (only one
DW_TAG_generic_subrange), so range_types is empty, and type is kept unmodified.

Consequently, in set_die_type we apply the DW_AT_data_location to the
element_type (the one at 0x139) instead of to the newly build array type.

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