GitHub pull request #2783 of commit 2dfd3e9d5590055e0764e07919de48bae55ae99a, no merge conflicts.sha1origin/pr/2783/mergeghprbActualCommit2dfd3e9d5590055e0764e07919de48bae55ae99aghprbActualCommitAuthorghprbActualCommitAuthorEmailghprbAuthorRepoGitUrlhttps://github.com/gfx/bcc.gitghprbTriggerAuthorghprbTriggerAuthorEmailghprbTriggerAuthorLoginyonghong-songghprbTriggerAuthorLoginMention@yonghong-songghprbPullId2783ghprbTargetBranchmasterghprbSourceBranchimprove_error_messages_in_usdt_pyGIT_BRANCHimprove_error_messages_in_usdt_pyghprbPullAuthorEmailghprbPullAuthorLogingfxghprbPullAuthorLoginMention@gfxghprbPullDescriptionGitHub pull request #2783 of commit 2dfd3e9d5590055e0764e07919de48bae55ae99a, no merge conflicts.ghprbPullTitleusdt.py: improve error messags for enable_probe()ghprbPullLinkhttps://github.com/iovisor/bcc/pull/2783ghprbPullLongDescription`USDT#enable_probe()` raises exceptions when the attaching process is not built with USDT probes, but its message does not say the right suggestions, as `enable_probe_or_bail` does.\r\n\r\nWith this PR, the two methods, `enable_probe` and `enable_probe_or_bail` share their error message, which suggests a possible cause.\r\n\r\nbefore:\r\n\r\n```\r\nfailed to enable probe '%s'; a possible cause\r\ncan be that the probe requires a pid to enable\r\n```\r\n\r\nafter:\r\n\r\n```\r\nFailed to enable USDT probe '%s':\r\nthe specified pid might not contain the given language's runtime,\r\nor the runtime was not built with the required USDT probes. Look\r\nfor a configure flag similar to --with-dtrace or --enable-dtrace.\r\nTo check which probes are present in the process, use the tplist tool.\r\n```\r\nghprbCommentBody[buildbot, ok to test]ghprbGhRepositoryiovisor/bccghprbCredentialsId6d3daf13-69b8-48b1-9c8f-ec5353264113false<a title="usdt.py: improve error messags for enable_probe()" href="https://github.com/iovisor/bcc/pull/2783">PR #2783</a>: usdt.py: improve error mess...#36315123237460664bcc-pr #363363false3632919SUCCESS1583169260431https://buildbot.iovisor.org/jenkins/user/dalehamel/my-views/view/all/job/bcc-pr/363/git363https://buildbot.iovisor.org/jenkins/user/dalehamel/my-views/view/all/job/bcc-pr/label=fc25/363/363https://buildbot.iovisor.org/jenkins/user/dalehamel/my-views/view/all/job/bcc-pr/label=fc26/363/363https://buildbot.iovisor.org/jenkins/user/dalehamel/my-views/view/all/job/bcc-pr/label=fc27/363/363https://buildbot.iovisor.org/jenkins/user/dalehamel/my-views/view/all/job/bcc-pr/label=fc28/363/363https://buildbot.iovisor.org/jenkins/user/dalehamel/my-views/view/all/job/bcc-pr/label=ubuntu1604/363/363https://buildbot.iovisor.org/jenkins/user/dalehamel/my-views/view/all/job/bcc-pr/label=ubuntu1710/363/363https://buildbot.iovisor.org/jenkins/user/dalehamel/my-views/view/all/job/bcc-pr/label=ubuntu1804/363/