info: expose more prog jited info #1598
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dylandreimerink
requested changes
Nov 1, 2024
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ti-mo
requested changes
Nov 25, 2024
It's to export the raw line infos alongside with prog's jited infos. Signed-off-by: Leon Hwang <hffilwlqm@gmail.com>
Expose these prog jited info: 1. JITed machine native instructions torvalds/linux@1e2709769086 ("bpf: Add BPF_OBJ_GET_INFO_BY_FD") 2. JITed line info torvalds/linux@c454a46b5efd ("bpf: Add bpf_line_info support") 3. JITed image lengths torvalds/linux@815581c11cc2 ("bpf: get JITed image lengths of functions via syscall") Signed-off-by: Leon Hwang <hffilwlqm@gmail.com>
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Since the original field is called jited_ksyms, reflect that in the Go API as well. Signed-off-by: Timo Beckers <timo@isovalent.com>
This was getting hard to follow with the 'name == "proc"' statements sprinkled around. These are actually separate tests, proc only populates type and tag. Remove negative tests from TestProgramInfoProc as newProgramInfoFromProc only sets those two fields. Signed-off-by: Timo Beckers <timo@isovalent.com>
dylandreimerink
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Dec 4, 2024
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Added tests for: - FuncInfos() - LineInfos() - JitedKsymAddrs() - JitedInsns() - JitedLineInfos() - JitedFuncLens() The existing test for JitedKsymAddrs was removed because it's not strictly necessary to load a CollectionSpec to exercise it. It obscured the fact that it seems like kernels before at least 5.4 need to have a subprog for jited addrs to be returned in prog info. TestProgInfoFuncInfos was removed for a similar reason. It's possible to craft a program using the asm package that meets the criteria for exercising FuncInfos() and LineInfos() in a deterministic way, no need to load a Collection. Signed-off-by: Timo Beckers <timo@isovalent.com>
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ti-mo
approved these changes
Dec 4, 2024
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@Asphaltt I added some tests for the new proginfo APIs, please include them next time. I also ended up renaming KsymAddrs to JitedKsymAddrs since that makes it clear that it concerns jited symbols and looks nicer alongside the other methods. This will break your build if you're importing unreleased main into your app. Also moved around some test-related things. |
Thank you very much.
Got it. |
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For pwru cilium/pwru#451, I'm going to inspect some inner details of bpf progs with LBR. But it requires the JITed info of bpf prog.
Then, expose more prog jited info: