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From: "vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug record/30075] New: [intel Performance-core] FAIL:
 gdb.python/py-record-btrace.exp: prepare record: python insn =
 r.instruction_history
Date: Fri, 03 Feb 2023 12:24:37 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D30075

            Bug ID: 30075
           Summary: [intel Performance-core] FAIL:
                    gdb.python/py-record-btrace.exp: prepare record:
                    python insn =3D r.instruction_history
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: record
          Assignee: unassigned at sourceware dot org
          Reporter: vries at gcc dot gnu.org
  Target Milestone: ---

The processor is a i7-1250U with 12 threads:
- 2 performance cores (I guess providing 2 threads per core), and
- 8 efficient cores.

When using:
- taskset -c 0-3, the test-case fails=20=20
- taskset -c 4-11, the test-case passes

Fails like this:
...
(gdb) PASS: gdb.python/py-record-btrace.exp: prepare record: stepi 100
python insn =3D r.instruction_history^M
warning: Decode error (-20) at instruction 33 (offset =3D 0x3d69, pc =3D 0x=
400501):
compressed return without call.^M
(gdb) FAIL: gdb.python/py-record-btrace.exp: prepare record: python insn =3D
r.instruction_history
...

--=20
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