mm/bpf/perf: Store build id in file object #4432
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Storing build id in file object for elf executable with build id defined. The build id is stored when file is mmaped. The build id object assignment to the file is locked with existing file->f_mapping semaphore. It's hidden behind new config option CONFIG_FILE_BUILD_ID. Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Use build id from file object in stackmap if it's available. Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Use build id from file object when available for perf's MMAP2 event build id data. Signed-off-by: Jiri Olsa <jolsa@kernel.org>
The test attaches bpf program to sched_process_exec tracepoint and gets build of executed file from bprm->file object. Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Testing iterator access to build id in vma->vm_file object by storing each binary with buildid into map and checking it against buildid retrieved in user space. Signed-off-by: Jiri Olsa <jolsa@kernel.org>
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Upstream branch: c1a3daf |
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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=717720 expired. Closing PR. |
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Pull request for series with
subject: mm/bpf/perf: Store build id in file object
version: 1
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=717720