GitHub pull request #2560 of commit 5e40419ae0f255c6a75aa70955b917a9ceb92941, no merge conflicts.sha1origin/pr/2560/mergeghprbActualCommit5e40419ae0f255c6a75aa70955b917a9ceb92941ghprbActualCommitAuthorYonghong SongghprbActualCommitAuthorEmailyhs@fb.comghprbAuthorRepoGitUrlhttps://github.com/iovisor/bcc.gitghprbTriggerAuthorghprbTriggerAuthorEmailghprbTriggerAuthorLoginghprbTriggerAuthorLoginMentionghprbPullId2560ghprbTargetBranchmasterghprbSourceBranchyhs_devGIT_BRANCHyhs_devghprbPullAuthorEmailghprbPullAuthorLoginyonghong-songghprbPullAuthorLoginMention@yonghong-songghprbPullDescriptionGitHub pull request #2560 of commit 5e40419ae0f255c6a75aa70955b917a9ceb92941, no merge conflicts.ghprbPullTitleassign offset properly for btf DataSecghprbPullLinkhttps://github.com/iovisor/bcc/pull/2560ghprbPullLongDescriptionThe following test case failed:\r\n```\r\n -bash-4.4$ cat test.py\r\n #!/usr/bin/python\r\n from bcc import BPF\r\n prog=\"\"\"\r\n BPF_ARRAY(array1, u64, 1);\r\n BPF_ARRAY(array2, u64, 1);\r\n \"\"\"\r\n b=BPF(text=prog, debug=0x20)\r\n -bash-4.4$ sudo ./test.py\r\n libbpf: Error loading BTF: Invalid argument(22)\r\n libbpf: magic: 0xeb9f\r\n version: 1\r\n flags: 0x0\r\n hdr_len: 24\r\n ...\r\n [57] DATASEC array size=176 vlen=2\r\n type_id=47 offset=0 size=88\r\n type_id=49 offset=0 size=88 Invalid offset\r\n\r\n Loading .BTF section failed\r\n -bash-4.4$\r\n```\r\nThe reason is the data offset in DataSec VarInfo\r\n(e.g., type_id=47 offset=0 size=88) always have\r\noffset=0 since JIT won't do a final relocation\r\nfor the record. Assign offset properly\r\nin bcc_btf before loading btf to the kernel.\r\nWith this patch, test case can load btf properly.\r\n```\r\n -bash-4.4$ cat test.py\r\n #!/usr/bin/python\r\n from bcc import BPF\r\n prog=\"\"\"\r\n BPF_ARRAY(array1, u64, 1);\r\n BPF_ARRAY(array2, u64, 1);\r\n \"\"\"\r\n b=BPF(text=prog, debug=0x20)\r\n -bash-4.4$ sudo ./test.py\r\n -bash-4.4$\r\n```\r\nSigned-off-by: Yonghong Song <yhs@fb.com>ghprbCommentBodynullghprbGhRepositoryiovisor/bccghprbCredentialsId6d3daf13-69b8-48b1-9c8f-ec5353264113false<a title="assign offset properly for btf DataSec" href="https://github.com/iovisor/bcc/pull/2560">PR #2560</a>: assign offset properly for ...#9311656307460664bcc-pr #9393false93772SUCCESS1571508757293https://buildbot.iovisor.org/jenkins/user/dalehamel/my-views/view/all/job/bcc-pr/93/git93https://buildbot.iovisor.org/jenkins/user/dalehamel/my-views/view/all/job/bcc-pr/label=fc25/93/93https://buildbot.iovisor.org/jenkins/user/dalehamel/my-views/view/all/job/bcc-pr/label=fc26/93/93https://buildbot.iovisor.org/jenkins/user/dalehamel/my-views/view/all/job/bcc-pr/label=fc27/93/93https://buildbot.iovisor.org/jenkins/user/dalehamel/my-views/view/all/job/bcc-pr/label=fc28/93/93https://buildbot.iovisor.org/jenkins/user/dalehamel/my-views/view/all/job/bcc-pr/label=ubuntu1604/93/93https://buildbot.iovisor.org/jenkins/user/dalehamel/my-views/view/all/job/bcc-pr/label=ubuntu1710/93/93https://buildbot.iovisor.org/jenkins/user/dalehamel/my-views/view/all/job/bcc-pr/label=ubuntu1804/93/