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From: "ayermolo at fb dot com" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug gdb/29562] New: disas command requires single quote around
 namespace
Date: Fri, 09 Sep 2022 00:57:41 +0000
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X-Bugzilla-Version: 11.2
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29562

            Bug ID: 29562
           Summary: disas command requires single quote around namespace
           Product: gdb
           Version: 11.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: ayermolo at fb dot com
  Target Milestone: ---

Not sure if this is exactly a bug in gdb, but I am hoping someone here who =
is
familiar with internal workings of it can point me into the right direction=
 of
where to start loooking.

I have an internal binary that is build with clang 12.
The structure of relevant debug info below, with all other dies and attribu=
tes
removed.:
 DW_TAG_compile_unit [141]
...
DW_TAG_namespace [2] * ()
 DW_AT_name [DW_FORM_strp] ( .debug_str[0xa57a80dd] =3D "namea")
...
DW_TAG_namespace [2] *=20
 DW_AT_name [DW_FORM_strp] ( .debug_str[0x7232f811] =3D "nameb")
..
 DW_TAG_subprogram [188] *=20
                    DW_AT_low_pc [DW_FORM_addr] (0x0000000000000000)
                    DW_AT_ranges [DW_FORM_sec_offset]
..
                    DW_AT_name [DW_FORM_strp] ( .debug_str[0x667d9d2f] =3D
"functionName")

When I do disas namea::nameb::functionName=20
I get=20
No type "nameb" within class or namespace "namea".
If I add single quotes
disas 'namea::nameb::functionName'
It works.

I should add this debug info after this binary has been optimized with BOLT.
https://lists.llvm.org/pipermail/llvm-dev/2020-October/145902.html
Pre BOLT disas namea::nameb::functionName works.
Main thing bolt does is convert DW_AT_low_pc/DW_AT_high_pc into
DW_AT_low_pc/DW_AT_ranges.

Looking at debug information for that CU only real difference is one mentio=
ned
above. The type references all point to correct dies. In LLDB it works, but=
 it
might be doing things differently.

I am trying to figure out if BOLT is somehow doing something wrong, or maybe
it's triggering something in GDB.

Thanks.

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