* [Bug runtime/30406] New: C symbol conflicts when using Fedora 36's 6.2 kernels and -DDEBUG_MEM
@ 2023-04-30 4:33 agentzh at gmail dot com
2023-04-30 4:39 ` [Bug runtime/30406] " agentzh at gmail dot com
2023-04-30 21:25 ` agentzh at gmail dot com
0 siblings, 2 replies; 3+ messages in thread
From: agentzh at gmail dot com @ 2023-04-30 4:33 UTC (permalink / raw)
To: systemtap
https://sourceware.org/bugzilla/show_bug.cgi?id=30406
Bug ID: 30406
Summary: C symbol conflicts when using Fedora 36's 6.2 kernels
and -DDEBUG_MEM
Product: systemtap
Version: unspecified
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: runtime
Assignee: systemtap at sourceware dot org
Reporter: agentzh at gmail dot com
Target Milestone: ---
When using Fedora 36 x86_64's own 6.2 kernel with the latest stap and the
`-DDEBUG_MEM` option, there is symbol conflicts with the kernel headers. It can
be reproduced by the following minimal example:
```
probe tcp.receive {
println("Hit");
exit();
}
```
And the compilation error when building the .ko file is like this:
```
$ /opt/stap/bin/stap -DDEBUG_MEM a.stp
In file included from ./include/linux/filter.h:9,
from ./include/net/sock_reuseport.h:5,
from ./include/net/tcp.h:35,
from
/tmp/stapciuh4P/stap_231a49b04a681bf897ea581eaa269a03_18995_src.c:40:
./include/linux/bpf.h:524:9: error: redeclaration of enumerator ‘MEM_PERCPU’
524 | MEM_PERCPU = BIT(4 + BPF_BASE_TYPE_BITS),
| ^~~~~~~~~~
In file included from /opt/stap/share/systemtap/runtime/linux/runtime.h:265,
from /opt/stap/share/systemtap/runtime/runtime.h:26,
from
/tmp/stapciuh4P/stap_231a49b04a681bf897ea581eaa269a03_18995_src.c:21:
/opt/stap/share/systemtap/runtime/linux/alloc.c:56:47: note: previous
definition of ‘MEM_PERCPU’ with type ‘enum _stp_memtype’
56 | enum _stp_memtype { MEM_KMALLOC, MEM_VMALLOC, MEM_PERCPU };
| ^~~~~~~~~~
make[1]: *** [scripts/Makefile.build:252:
/tmp/stapciuh4P/stap_231a49b04a681bf897ea581eaa269a03_18995_src.o] Error 1
make: *** [Makefile:2025: /tmp/stapciuh4P] Error 2
WARNING: kbuild exited with status: 2
Pass 4: compilation failed. [man error::pass4]
```
It is the symbol MEM_PERCPU in conflict. I'll propose a patch to add the `STP_`
prefix to stap runtime's symbols there to avoid such issues.
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* [Bug runtime/30406] C symbol conflicts when using Fedora 36's 6.2 kernels and -DDEBUG_MEM
2023-04-30 4:33 [Bug runtime/30406] New: C symbol conflicts when using Fedora 36's 6.2 kernels and -DDEBUG_MEM agentzh at gmail dot com
@ 2023-04-30 4:39 ` agentzh at gmail dot com
2023-04-30 21:25 ` agentzh at gmail dot com
1 sibling, 0 replies; 3+ messages in thread
From: agentzh at gmail dot com @ 2023-04-30 4:39 UTC (permalink / raw)
To: systemtap
https://sourceware.org/bugzilla/show_bug.cgi?id=30406
--- Comment #1 from agentzh <agentzh at gmail dot com> ---
The patch is here:
https://gist.github.com/agentzh/2014e2656bbace5dbb38bc61695b988a Does it look
good?
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* [Bug runtime/30406] C symbol conflicts when using Fedora 36's 6.2 kernels and -DDEBUG_MEM
2023-04-30 4:33 [Bug runtime/30406] New: C symbol conflicts when using Fedora 36's 6.2 kernels and -DDEBUG_MEM agentzh at gmail dot com
2023-04-30 4:39 ` [Bug runtime/30406] " agentzh at gmail dot com
@ 2023-04-30 21:25 ` agentzh at gmail dot com
1 sibling, 0 replies; 3+ messages in thread
From: agentzh at gmail dot com @ 2023-04-30 21:25 UTC (permalink / raw)
To: systemtap
https://sourceware.org/bugzilla/show_bug.cgi?id=30406
agentzh <agentzh at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|UNCONFIRMED |RESOLVED
--- Comment #2 from agentzh <agentzh at gmail dot com> ---
Patch was pushed to the git repo after fche gave the greenlight.
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2023-04-30 4:33 [Bug runtime/30406] New: C symbol conflicts when using Fedora 36's 6.2 kernels and -DDEBUG_MEM agentzh at gmail dot com
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