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Date: Wed, 8 Jul 2015 13:13:49 +0000 From: Wang Nan <wangnan0@...wei.com> To: <acme@...nel.org>, <ast@...mgrid.com> CC: <linux-kernel@...r.kernel.org>, <lizefan@...wei.com>, <hekuang@...wei.com>, <xiakaixu@...wei.com>, <pi3orama@....com> Subject: [PATCH v11 00/39] perf tools: filtering events using eBPF programs - part1 Hi Arnaldo Carvalho de Melo, I rearranged the first 39 patches of this patchset according to your comments. After applying all of them you can use a hello world BPF program for testing. They are based on your 'tmp.perf/ebpf', commit 60cd37eb100c4880b28078a47f3062fac7572095. I hope I can manage a public avaliable git repository for you tomorrow (tomorrow means 24 hours later). What about a repository on github? However I have to do this out of my office because of company's IT policy. In this v11 you can see following improvements: Commit messages improvements: 'bpf tools: Collect symbol table from SHT_SYMTAB section' 'bpf tools: Collect relocation sections from SHT_REL sections' 'bpf tools: Record map accessing instructions for each program' 'bpf tools: Relocate eBPF programs' 'bpf tools: Link all bpf objects onto a list' Decoupling: 'bpf tools: Collect eBPF programs from their own sections' 'bpf tools: Introduce accessors for struct bpf_program' Renaming: bpf_object__for_each -> bpf_object__for_each_safe 'bpf tools: Link all bpf objects onto a list' Patch ordering: 'perf tools: Make perf depend on libbpf' Error message improvement (refer to http://llvm.org/apt): 'perf tools: Call clang to compile C source to object code' In this v11 part 1 patch set, I haven't follow your comment in 'bpf tools: Introduce accessors for struct bpf_object' that let me update accessors API from returning error code to returning actual value and indicate error using invalid values. I prefer current API because I saw and fixed many bugs related to error code in perf's code (like commit ed30775). Reason of those bugs are misusing of error code: some part of code return negative on error, some part of code return non-zero on error, and developer forgot them. I don't want libbpf to introduce more bugs like them. But if you insist on it, I'll change it. Wang Nan (39): bpf: Use correct #ifdef controller for trace_call_bpf() tracing, perf: Implement BPF programs attached to uprobes bpf tools: Introduce 'bpf' library and add bpf feature check bpf tools: Allow caller to set printing function bpf tools: Open eBPF object file and do basic validation bpf tools: Read eBPF object from buffer bpf tools: Check endianness and make libbpf fail early bpf tools: Iterate over ELF sections to collect information bpf tools: Collect version and license from ELF sections bpf tools: Collect map definitions from 'maps' section bpf tools: Collect symbol table from SHT_SYMTAB section bpf tools: Collect eBPF programs from their own sections bpf tools: Collect relocation sections from SHT_REL sections bpf tools: Record map accessing instructions for each program bpf tools: Add bpf.c/h for common bpf operations bpf tools: Create eBPF maps defined in an object file bpf tools: Relocate eBPF programs bpf tools: Introduce bpf_load_program() to bpf.c bpf tools: Load eBPF programs in object files into kernel bpf tools: Introduce accessors for struct bpf_program bpf tools: Introduce accessors for struct bpf_object bpf tools: Link all bpf objects onto a list perf tools: Introduce llvm config options perf tools: Call clang to compile C source to object code perf tools: Auto detecting kernel build directory perf tools: Auto detecting kernel include options perf tests: Add LLVM test for eBPF on-the-fly compiling perf tools: Make perf depend on libbpf perf record: Enable passing bpf object file to --event perf record: Compile scriptlets if pass '.c' to --event perf tools: Parse probe points of eBPF programs during preparation perf probe: Attach trace_probe_event with perf_probe_event perf record: Probe at kprobe points perf record: Load all eBPF object into kernel perf tools: Add bpf_fd field to evsel and config it perf tools: Attach eBPF program to perf event perf tools: Suppress probing messages when probing by BPF loading perf record: Add clang options for compiling BPF scripts bpf tools: Load a program with different instance using preprocessor include/linux/trace_events.h | 7 +- kernel/events/core.c | 4 +- kernel/trace/Kconfig | 2 +- kernel/trace/trace_uprobe.c | 5 + tools/build/Makefile.feature | 6 +- tools/build/feature/Makefile | 6 +- tools/build/feature/test-bpf.c | 18 + tools/lib/bpf/.gitignore | 2 + tools/lib/bpf/Build | 1 + tools/lib/bpf/Makefile | 195 +++++++ tools/lib/bpf/bpf.c | 85 +++ tools/lib/bpf/bpf.h | 23 + tools/lib/bpf/libbpf.c | 1184 +++++++++++++++++++++++++++++++++++++++ tools/lib/bpf/libbpf.h | 107 ++++ tools/perf/MANIFEST | 3 + tools/perf/Makefile.perf | 19 +- tools/perf/builtin-probe.c | 4 +- tools/perf/builtin-record.c | 43 +- tools/perf/config/Makefile | 19 +- tools/perf/tests/Build | 1 + tools/perf/tests/builtin-test.c | 4 + tools/perf/tests/llvm.c | 85 +++ tools/perf/tests/make | 4 +- tools/perf/tests/tests.h | 1 + tools/perf/util/Build | 2 + tools/perf/util/bpf-loader.c | 310 ++++++++++ tools/perf/util/bpf-loader.h | 46 ++ tools/perf/util/config.c | 4 + tools/perf/util/debug.c | 5 + tools/perf/util/debug.h | 1 + tools/perf/util/evlist.c | 41 ++ tools/perf/util/evlist.h | 1 + tools/perf/util/evsel.c | 17 + tools/perf/util/evsel.h | 1 + tools/perf/util/llvm-utils.c | 373 ++++++++++++ tools/perf/util/llvm-utils.h | 39 ++ tools/perf/util/parse-events.c | 16 + tools/perf/util/parse-events.h | 2 + tools/perf/util/parse-events.l | 6 + tools/perf/util/parse-events.y | 29 +- tools/perf/util/probe-event.c | 82 +-- tools/perf/util/probe-event.h | 7 +- 42 files changed, 2759 insertions(+), 51 deletions(-) create mode 100644 tools/build/feature/test-bpf.c create mode 100644 tools/lib/bpf/.gitignore create mode 100644 tools/lib/bpf/Build create mode 100644 tools/lib/bpf/Makefile create mode 100644 tools/lib/bpf/bpf.c create mode 100644 tools/lib/bpf/bpf.h create mode 100644 tools/lib/bpf/libbpf.c create mode 100644 tools/lib/bpf/libbpf.h create mode 100644 tools/perf/tests/llvm.c create mode 100644 tools/perf/util/bpf-loader.c create mode 100644 tools/perf/util/bpf-loader.h create mode 100644 tools/perf/util/llvm-utils.c create mode 100644 tools/perf/util/llvm-utils.h -- 1.8.3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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