GitHub pull request #2957 of commit d9f7e7f174ee5e9e6caf48aa5cba213f861b2219, no merge conflicts.sha1origin/pr/2957/mergeghprbActualCommitd9f7e7f174ee5e9e6caf48aa5cba213f861b2219ghprbActualCommitAuthorghprbActualCommitAuthorEmailghprbAuthorRepoGitUrlhttps://github.com/ethercflow/bcc.gitghprbTriggerAuthorghprbTriggerAuthorEmailghprbTriggerAuthorLoginyonghong-songghprbTriggerAuthorLoginMention@yonghong-songghprbPullId2957ghprbTargetBranchmasterghprbSourceBranchlibbpf-toolsGIT_BRANCHlibbpf-toolsghprbPullAuthorEmailethercflow@gmail.comghprbPullAuthorLoginethercflowghprbPullAuthorLoginMention@ethercflowghprbPullDescriptionGitHub pull request #2957 of commit d9f7e7f174ee5e9e6caf48aa5cba213f861b2219, no merge conflicts.ghprbPullTitlelibbpf-tools: refactor, move public methods to trace_helpers.cghprbPullLinkhttps://github.com/iovisor/bcc/pull/2957ghprbPullLongDescription- extract `bump_memlock_rlimit` and put into `trace_helpers.c`\r\n- extract `get_ktime_ns` and put into `trace_helpers.c`\r\n- Resort struct's fields by alignment size instead of field size\r\n\r\nSigned-off-by: Wenbo Zhang <ethercflow@gmail.com>ghprbCommentBody[buildbot, test this please]ghprbGhRepositoryiovisor/bccghprbCredentialsId6d3daf13-69b8-48b1-9c8f-ec5353264113false<a title="libbpf-tools: refactor, move public methods to trace_helpers.c" href="https://github.com/iovisor/bcc/pull/2957">PR #2957</a>: libbpf-tools: refactor, mov...#54115606247460664bcc-pr #541541false5414336SUCCESS1591713387467https://buildbot.iovisor.org/jenkins/user/davemarchevsky/my-views/view/all/job/bcc-pr/541/git541https://buildbot.iovisor.org/jenkins/user/davemarchevsky/my-views/view/all/job/bcc-pr/label=fc25/541/541https://buildbot.iovisor.org/jenkins/user/davemarchevsky/my-views/view/all/job/bcc-pr/label=fc26/541/541https://buildbot.iovisor.org/jenkins/user/davemarchevsky/my-views/view/all/job/bcc-pr/label=fc27/541/541https://buildbot.iovisor.org/jenkins/user/davemarchevsky/my-views/view/all/job/bcc-pr/label=fc28/541/541https://buildbot.iovisor.org/jenkins/user/davemarchevsky/my-views/view/all/job/bcc-pr/label=ubuntu1604/541/541https://buildbot.iovisor.org/jenkins/user/davemarchevsky/my-views/view/all/job/bcc-pr/label=ubuntu1710/541/541https://buildbot.iovisor.org/jenkins/user/davemarchevsky/my-views/view/all/job/bcc-pr/label=ubuntu1804/541/