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[Bug bpf/24804] bpf code generation unable to determine type of target variable used to index global variable
- From: "wcohen at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sourceware dot org
- Date: Thu, 11 Jul 2019 17:55:55 +0000
- Subject: [Bug bpf/24804] bpf code generation unable to determine type of target variable used to index global variable
- Auto-submitted: auto-generated
- References: <bug-24804-6586@http.sourceware.org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=24804
--- Comment #1 from William Cohen <wcohen at redhat dot com> ---
Correction. Here is an example of the bpf backend getting the $id target
variable type is properly determined and the script runs:
[wcohen@localhost systemtap]$ sudo stap --bpf -e 'probe
kernel.trace("sys_enter"){printf("%d ", $id)}' -T 1
13 228 228 228 0 257 228 228 228 228 228 228 232 228 228 228 0 257 228 13 9 10
56 16 321 34 273 9 11 11 10 7 5 1 14 14 228 0 39 228 23 14 14 228 1 228 23 1 14
14 228 0 39 228 23 14 14 228 1 228 23 1 14 14 228 0 39 228 23 14 14 228 1 228
23 1 14 14 228 0 39 228 23 14 14 228 1 228 23 1 14 14 228 0 39 228 23 14 14 228
1 228 23 1 14 14 228 0 39 228 23 14 14 228 1 228 23 1 14 14 228 0 39 228 23 14
14 228 1 228 23 1 14 14 228 0 39 228 23 14 14 228 1 228 23 1 14 14 228 0 39 228
23 14 14 228 1 228 23 1 14 14 228 0 39 228 23 14 14 228 1 228 23 1 14 14 228 0
39 228 23 14 14 228 1 228 23 1 14 14 228 0 39 228 23 14 14 228 1 228 23 1 14 14
228 0 39 228 23 14 14 228 1 228 23 1 14 14 228 0 39 228 23 14 14 228 1 228 23 1
14 14 228 0 39 228 23 14 14 228 1 228 23 1 14 14 228 0 39 228 23 14 14 228 1
228 23 1 14 14 228 0 39 228 23 14 14 228 1 228 23 1 14 WARNING: lost 624
perf_events on cpu 0
7 1 14 14 228 0 39 228 23 14 14 228 1 228 23 1 1 1 1 1 1 1 1 1 1 1 14 14 228 0
39 WARNING: lost 2253 perf_events on cpu 0
bpfinterp.cxx:387: printf already started
WARNING: /usr/bin/stapbpf exited with signal: 6 (Aborted)
Pass 5: run failed. [man error::pass5]
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