Bug 496630

Summary:	app-emulation/qemu: running strace hits: PTRACE_TRACEME doesn't work as it is not implemented
Product:	Gentoo Linux	Reporter:	Tom Wijsman (TomWij) (RETIRED) <tomwij>
Component:	Current packages	Assignee:	Gentoo's Team for Core System packages <base-system>
Status:	RESOLVED UPSTREAM
Severity:	normal
Priority:	Normal
Version:	unspecified
Hardware:	ARM
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description Tom Wijsman (TomWij) (RETIRED) gentoo-dev

2013-12-31 21:48:52 UTC

$ strace 'find . -type f -print0 | xargs -0 touch -r configure' 2>&1 > /tmp/strace
qemu: Unsupported syscall: 26
/usr/bin/strace: test_ptrace_setoptions_for_all: PTRACE_TRACEME doesn't work: Function not implemented
/usr/bin/strace: test_ptrace_setoptions_for_all: unexpected exit status 1

Bug #496406 has `emerge --info` information, but note the comment above it; it may not fully reflect everything. Therefore, let me know which extra details you need; as I have no idea what this error even means or where the problem could be.

Thank you very much in advance.

Comment 1 SpanKY gentoo-dev

2014-01-01 06:30:31 UTC

i think the operative part of that output is:
qemu: Unsupported syscall: 26

it's a known issue that running strace in qemu doesn't work seeing as how it relies on ptrace, and doing arch<->arch ptrace interpolation is a hairy hairy mess.

run strace natively and i'm sure it'll work fine.