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From: "rajpal.gusain at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug gdb/29188] New: gdb too slow and hogs memory for debug binary
 generated with gcc 11.2
Date: Thu, 26 May 2022 17:30:17 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29188

            Bug ID: 29188
           Summary: gdb too slow and hogs memory for debug binary
                    generated with gcc 11.2
           Product: gdb
           Version: 11.2
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: rajpal.gusain at gmail dot com
  Target Milestone: ---

Created attachment 14115
  --> https://sourceware.org/bugzilla/attachment.cgi?id=3D14115&action=3Ded=
it
pstack output captured when gdb was stuck

We recently migrated our projects to gcc 11.2 and it has dwarf 5 as default
debugging format (unsure if it's consequential).

And I notice that gdb is not liking it, debugging 11.2 compiled binary with=
 gdb
11.2 is pathetically slow and sometimes even backtrace takes 3 mins and mem=
ory
consumption of gdb process also goes up significantly.=20
I then tried old gdb 8.3 and I still have same problem


I dumped pstack on gdb process (with gdb 8.3) when it was churning wheels d=
oing
backtrace and breakpoint completion and that's the only information I can s=
hare
right now.

Debugging in general is painstakingly slow and almost impractical.=20


I did try to compile with dwarf4 format but it doesn't seem to help with the
gdb performance.=20

Are there any suggestions/workarounds to deal with this issue?

Let me know if any other information is needed.

Binary was compiled with -g3 option.

--=20
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