GitHub pull request #3207 of commit df53137f495e1a7ab79a84fc6c20c28a864d17b1, no merge conflicts.sha1origin/pr/3207/mergeghprbActualCommitdf53137f495e1a7ab79a84fc6c20c28a864d17b1ghprbActualCommitAuthorghprbActualCommitAuthorEmailghprbAuthorRepoGitUrlhttps://github.com/Jongy/bcc.gitghprbTriggerAuthorghprbTriggerAuthorEmailghprbTriggerAuthorLoginyonghong-songghprbTriggerAuthorLoginMention@yonghong-songghprbPullId3207ghprbTargetBranchmasterghprbSourceBranchfix-perf-submit-arrayGIT_BRANCHfix-perf-submit-arrayghprbPullAuthorEmailghprbPullAuthorLoginJongyghprbPullAuthorLoginMention@JongyghprbPullDescriptionGitHub pull request #3207 of commit df53137f495e1a7ab79a84fc6c20c28a864d17b1, no merge conflicts.ghprbPullTitleFix perf_submit() calls with array arg1 crashing libbccghprbPullLinkhttps://github.com/iovisor/bcc/pull/3207ghprbPullLongDescriptionI'm writing a tool that streams unstructured data. Tried to use ringbuf but sadly it's available only since 5.8, which I don't have running now :(\r\nSo I'm using `BPF_PERF_OUTPUT` and trying to pass an array like:\r\n\r\n```\r\nunsigned char buf[16] = ...;\r\noutput.perf_submit(ctx, buf, sizeof(buf));\r\n```\r\nbut it crashes libbcc.\r\n\r\nNow that I understand the issue, changing the code to use `&buf` avoids it, but I think it's worth fixing the crash anyway.\r\n\r\nThis commit adds the first use of the `getTypePtrOrNull` to bcc, I'm not sure in which LLVM version it was added, but I checked and it exists at least since [LLVM 3](https://github.com/llvm/llvm-project/blob/llvmorg-3.0.0/clang/include/clang/AST/Type.h#L505), which is old enough, I guess.\r\n\r\nI tested `opensnoop` which makes use of the autogenerated perf data structures feature, to ensure I didn't completely disable it (and all cases that now don't go into the `if` would have crashed before, anyway...)ghprbCommentBody[buildbot, test this please]ghprbGhRepositoryiovisor/bccghprbCredentialsId6d3daf13-69b8-48b1-9c8f-ec5353264113false<a title="Fix perf_submit() calls with array arg1 crashing libbcc" href="https://github.com/iovisor/bcc/pull/3207">PR #3207</a>: Fix perf_submit() calls wit...#77213533437460664bcc-pr #772772false7726157SUCCESS1609276059272https://buildbot.iovisor.org/jenkins/user/danobi/my-views/view/all/job/bcc-pr/772/git772https://buildbot.iovisor.org/jenkins/user/danobi/my-views/view/all/job/bcc-pr/label=fc25/772/772https://buildbot.iovisor.org/jenkins/user/danobi/my-views/view/all/job/bcc-pr/label=fc26/772/772https://buildbot.iovisor.org/jenkins/user/danobi/my-views/view/all/job/bcc-pr/label=fc27/772/772https://buildbot.iovisor.org/jenkins/user/danobi/my-views/view/all/job/bcc-pr/label=fc28/772/772https://buildbot.iovisor.org/jenkins/user/danobi/my-views/view/all/job/bcc-pr/label=ubuntu1604/772/772https://buildbot.iovisor.org/jenkins/user/danobi/my-views/view/all/job/bcc-pr/label=ubuntu1710/772/772https://buildbot.iovisor.org/jenkins/user/danobi/my-views/view/all/job/bcc-pr/label=ubuntu1804/772/