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* perf python: Fix pyrf_evlist__read_on_cpu() interfaceJiri Olsa2018-08-201-1/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Jaroslav reported errors from valgrind over perf python script: # echo 0 > /sys/devices/system/cpu/cpu4/online # valgrind ./test.py ==7524== Memcheck, a memory error detector ... ==7524== Command: ./test.py ==7524== pid 7526 exited ==7524== Invalid read of size 8 ==7524== at 0xCC2C2B3: perf_mmap__read_forward (evlist.c:780) ==7524== by 0xCC2A681: pyrf_evlist__read_on_cpu (python.c:959) ... ==7524== Address 0x65c4868 is 16 bytes after a block of size 459,36.. ==7524== at 0x4C2B955: calloc (vg_replace_malloc.c:711) ==7524== by 0xCC2F484: zalloc (util.h:35) ==7524== by 0xCC2F484: perf_evlist__alloc_mmap (evlist.c:978) ... The reason for this is in the python interface, that allows a script to pass arbitrary cpu number, which is then used to access struct perf_evlist::mmap array. That's obviously wrong and works only when if all cpus are available and fails if some cpu is missing, like in the example above. This patch makes pyrf_evlist__read_on_cpu() search the evlist's maps array for the proper map to access. It's linear search at the moment. Based on the way how is the read_on_cpu used, I don't think we need to be fast in here. But we could add some hash in the middle to make it fast/er. We don't allow python interface to set write_backward event attribute, so it's safe to check only evlist's mmaps. Reported-by: Jaroslav Škarvada <jskarvad@redhat.com> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Joe Mario <jmario@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180817114556.28000-3-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf mmap: Store real cpu number in 'struct perf_mmap'Jiri Olsa2018-08-203-3/+5
| | | | | | | | | | | | | | | | Store the real cpu number in 'struct perf_mmap', which will be used by python interface that allows user to read a particular memory map for given cpu. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jaroslav Škarvada <jskarvad@redhat.com> Cc: Joe Mario <jmario@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180817114556.28000-2-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Remove ext from struct kmod_pathJiri Olsa2018-08-203-85/+69
| | | | | | | | | | | | | | Having comp carrying the compression ID, we no longer need return the extension. Removing it and updating the automated test. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180817094813.15086-14-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Add gzip_is_compressed functionJiri Olsa2018-08-201-2/+14
| | | | | | | | | | | | | Add implementation of the is_compressed callback for gzip. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180817094813.15086-13-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Add lzma_is_compressed functionJiri Olsa2018-08-201-2/+17
| | | | | | | | | | | | | Add implementation of the is_compressed callback for lzma. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180817094813.15086-12-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Add is_compressed callback to compressions arrayJiri Olsa2018-08-204-3/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add is_compressed callback to the compressions array, that returns 0 if the file is compressed or != 0 if not. The new callback is used to recognize the situation when we have a 'compressed' object, like: /lib/modules/.../drivers/net/ethernet/intel/igb/igb.ko.xz but we need to read its debug data from debuginfo files, which might not be compressed, like: /root/.debug/.build-id/d6/...c4b301f/debug So even for a 'compressed' object we read debug data from a plain uncompressed object. To keep this transparent, we detect this in decompress_kmodule() and return the file descriptor to the uncompressed file. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180817094813.15086-11-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Move the temp file processing into decompress_kmoduleJiri Olsa2018-08-201-17/+12
| | | | | | | | | | | | | | | | | | We will add a compression check in the following patch and it makes it easier if the file processing is done in a single place. It also makes the current code simpler. The decompress_kmodule function now returns the fd of the uncompressed file and the file name in the pathname arg, if it's provided. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180817094813.15086-10-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Use compression id in decompress_kmodule()Jiri Olsa2018-08-201-21/+3
| | | | | | | | | | | | | | Once we parsed out the compression ID, we dont need to iterate all available compressions and we can call it directly. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180817094813.15086-9-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Store compression id into struct dsoJiri Olsa2018-08-203-2/+8
| | | | | | | | | | | | | | Add comp to 'struct dso' to hold the compression index. It will be used in the following patches. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180817094813.15086-8-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Add compression id into 'struct kmod_path'Jiri Olsa2018-08-203-29/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Store a decompression ID in 'struct kmod_path', so it can be later stored in 'struct dso'. Switch 'struct kmod_path's 'comp' from 'bool' to 'int' to return the compressions array index. Add 0 index item into compressions array, so that the comp usage stays as it was: 0 - no compression, != 0 compression index. Update the kmod_path tests. Committer notes: Use a designated initializer + terminating comma, e.g. { .fmt = NULL, }, to fix the build in several distros: centos:6: util/dso.c:201: error: missing initializer centos:6: util/dso.c:201: error: (near initialization for 'compressions[0].decompress') debian:9: util/dso.c:201:24: error: missing field 'decompress' initializer [-Werror,-Wmissing-field-initializers] fedora:25: util/dso.c:201:24: error: missing field 'decompress' initializer [-Werror,-Wmissing-field-initializers] fedora:26: util/dso.c:201:24: error: missing field 'decompress' initializer [-Werror,-Wmissing-field-initializers] fedora:27: util/dso.c:201:24: error: missing field 'decompress' initializer [-Werror,-Wmissing-field-initializers] oraclelinux:6: util/dso.c:201: error: missing initializer oraclelinux:6: util/dso.c:201: error: (near initialization for 'compressions[0].decompress') ubuntu:12.04.5: util/dso.c:201:2: error: missing initializer [-Werror=missing-field-initializers] ubuntu:12.04.5: util/dso.c:201:2: error: (near initialization for 'compressions[0].decompress') [-Werror=missing-field-initializers] ubuntu:16.04: util/dso.c:201:24: error: missing field 'decompress' initializer [-Werror,-Wmissing-field-initializers] ubuntu:16.10: util/dso.c:201:24: error: missing field 'decompress' initializer [-Werror,-Wmissing-field-initializers] ubuntu:16.10: util/dso.c:201:24: error: missing field 'decompress' initializer [-Werror,-Wmissing-field-initializers] ubuntu:17.10: util/dso.c:201:24: error: missing field 'decompress' initializer [-Werror,-Wmissing-field-initializers] Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180817094813.15086-7-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Make is_supported_compression() staticJiri Olsa2018-08-202-2/+1
| | | | | | | | | | | | | There's no outside user of it. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180817094813.15086-6-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Make decompress_to_file() function staticJiri Olsa2018-08-202-2/+1
| | | | | | | | | | | | | There's no outside user of it. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180817094813.15086-5-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Get rid of dso__needs_decompress() call in __open_dso()Jiri Olsa2018-08-201-1/+3
| | | | | | | | | | | | | There's no need to call dso__needs_decompress() twice in the function. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180817094813.15086-4-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Get rid of dso__needs_decompress() call in symbol__disassemble()Jiri Olsa2018-08-201-1/+3
| | | | | | | | | | | | | There's no need to call dso__needs_decompress() twice in the function. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180817094813.15086-3-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Get rid of dso__needs_decompress() call in read_object_code()Jiri Olsa2018-08-201-1/+3
| | | | | | | | | | | | | There's no need to call dso__needs_decompress() twice in the function. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180817094813.15086-2-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf llvm: Allow passing options to llc in addition to clangArnaldo Carvalho de Melo2018-08-202-2/+38
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The newly added 'llvm.opts' variable allows passing options directly to llc, like needed to get sane DWARF in BPF ELF debug sections: With: [root@seventh perf]# cat ~/.perfconfig [llvm] dump-obj = true clang-opt = -g [root@seventh perf]# We get: [root@seventh perf]# perf trace -e tools/perf/examples/bpf/hello.c cat /etc/passwd > /dev/null LLVM: dumping tools/perf/examples/bpf/hello.o 0.000 __bpf_stdout__:Hello, world 0.015 __bpf_stdout__:Hello, world 0.187 __bpf_stdout__:Hello, world [root@seventh perf]# pahole tools/perf/examples/bpf/hello.o struct clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566eefef9c3777bd780ec4cbb9efa764633b76c) { clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566e.org clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566eefef9c3777bd780ec4cbb9efa764633b76c); /* 0 4 */ clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566e.org clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566eefef9c3777bd780ec4cbb9efa764633b76c); /* 4 4 */ clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566e.org clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566eefef9c3777bd780ec4cbb9efa764633b76c); /* 8 4 */ clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566e.org clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566eefef9c3777bd780ec4cbb9efa764633b76c); /* 12 4 */ clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566e.org clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566eefef9c3777bd780ec4cbb9efa764633b76c); /* 16 4 */ clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566e.org clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566eefef9c3777bd780ec4cbb9efa764633b76c); /* 20 4 */ clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566e.org clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566eefef9c3777bd780ec4cbb9efa764633b76c); /* 24 4 */ /* size: 28, cachelines: 1, members: 7 */ /* last cacheline: 28 bytes */ }; [root@seventh perf]# Adding these options to be passed to llvm's llc: [root@seventh perf]# cat ~/.perfconfig [llvm] dump-obj = true clang-opt = -g opts = -mattr=dwarfris [root@seventh perf]# We get sane output: [root@seventh perf]# perf trace -e tools/perf/examples/bpf/hello.c cat /etc/passwd > /dev/null LLVM: dumping tools/perf/examples/bpf/hello.o 0.000 __bpf_stdout__:Hello, world 0.015 __bpf_stdout__:Hello, world 0.185 __bpf_stdout__:Hello, world [root@seventh perf]# pahole tools/perf/examples/bpf/hello.o struct bpf_map { unsigned int type; /* 0 4 */ unsigned int key_size; /* 4 4 */ unsigned int value_size; /* 8 4 */ unsigned int max_entries; /* 12 4 */ unsigned int map_flags; /* 16 4 */ unsigned int inner_map_idx; /* 20 4 */ unsigned int numa_node; /* 24 4 */ /* size: 28, cachelines: 1, members: 7 */ /* last cacheline: 28 bytes */ }; [root@seventh perf]# Cc: Alexei Starovoitov <ast@fb.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Martin KaFai Lau <kafai@fb.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com>, Cc: Yonghong Song <yhs@fb.com> Link: https://lkml.kernel.org/n/tip-0lrwmrip4dru1651rm8xa7tq@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf parser: Improve error message for PMU address filtersJack Henschel2018-08-201-10/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is the second version of a patch that improves the error message of the perf events parser when the PMU hardware does not support address filters. Previously, the perf returned the following error: $ perf record -e intel_pt// --filter 'filter sys_write' --filter option should follow a -e tracepoint or HW tracer option This implies there is some syntax error present in the command line, which is not true. Rather, notify the user that the CPU does not have support for this feature. For example, Intel chips based on the Broadwell micro-archticture have the Intel PT PMU, but do not support address filtering. Now, perf prints the following error message: $ perf record -e intel_pt// --filter 'filter sys_write' This CPU does not support address filtering Signed-off-by: Jack Henschel <jackdev@mailbox.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180704121345.19025-1-jackdev@mailbox.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Disable parallelism for 'make clean'Rasmus Villemoes2018-08-201-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | The Yocto build system does a 'make clean' when rebuilding due to changed dependencies, and that consistently fails for me (causing the whole BSP build to fail) with errors such as | find: '[...]/perf/1.0-r9/perf-1.0/plugin_mac80211.so': No such file or directory | find: '[...]/perf/1.0-r9/perf-1.0/plugin_mac80211.so': No such file or directory | find: find: '[...]/perf/1.0-r9/perf-1.0/libtraceevent.a''[...]/perf/1.0-r9/perf-1.0/libtraceevent.a': No such file or directory: No such file or directory | [...] | find: cannot delete '/mnt/xfs/devel/pil/yocto/tmp-glibc/work/wandboard-oe-linux-gnueabi/perf/1.0-r9/perf-1.0/util/.pstack.o.cmd': No such file or directory Apparently (despite the comment), 'make clean' ends up launching multiple sub-makes that all want to remove the same things - perhaps this only happens in combination with a O=... parameter. In any case, we don't lose much by explicitly disabling the parallelism for the clean target, and it makes automated builds much more reliable. Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180705131527.19749-1-linux@rasmusvillemoes.dk Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf auxtrace: Fix queue resizeAdrian Hunter2018-08-141-0/+3
| | | | | | | | | | | | | When the number of queues grows beyond 32, the array of queues is resized but not all members were being copied. Fix by also copying 'tid', 'cpu' and 'set'. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: stable@vger.kernel.org Fixes: e502789302a6e ("perf auxtrace: Add helpers for queuing AUX area tracing data") Link: http://lkml.kernel.org/r/20180814084608.6563-1-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf python: Remove -mcet and -fcf-protection when building with clangArnaldo Carvalho de Melo2018-08-141-1/+9
| | | | | | | | | | | | | | | | | | These options are not present in older clang versions, so when we build for a distro that has a gcc new enough to have these options and that the distro python build config settings use them but clang doesn't support, b00m. This is the case with fedora 28 and rawhide, so check if clang has the options and remove the missing ones from CFLAGS. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-7asds7yn6gzg6ns1lw17ukul@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf arm spe: Fix uninitialized record error variableKim Phillips2018-08-141-0/+1
| | | | | | | | | | | | | | | | | | | The auxtrace init variable 'err' was not being initialized, leading perf to abort early in an SPE record command when there was no explicit error, rather only based whatever memory contents were on the stack. Initialize it explicitly on getting an SPE successfully, the same way cs-etm does. Signed-off-by: Kim Phillips <kim.phillips@arm.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Dongjiu Geng <gengdongjiu@huawei.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Fixes: ffd3d18c20b8 ("perf tools: Add ARM Statistical Profiling Extensions (SPE) support") Link: http://lkml.kernel.org/r/20180810174512.52900813e57cbccf18ce99a2@arm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Move syscall_64.tbl check into check-headers.shJiri Olsa2018-08-142-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Probably leftover from the time we introducd the check-headers.sh script. Committer testing: Remove the 'rseq' syscall from tools/perf/arch/x86/entry/syscalls/syscall_64.tbl to fake a diff: make: Entering directory '/home/acme/git/perf/tools/perf' BUILD: Doing 'make -j4' parallel build Warning: Kernel ABI header at 'tools/perf/arch/x86/entry/syscalls/syscall_64.tbl' differs from latest version at 'arch/x86/entry/syscalls/syscall_64.tbl' diff -u tools/perf/arch/x86/entry/syscalls/syscall_64.tbl arch/x86/entry/syscalls/syscall_64.tbl CC /tmp/build/perf/util/syscalltbl.o INSTALL trace_plugins <SNIP> $ diff -u tools/perf/arch/x86/entry/syscalls/syscall_64.tbl arch/x86/entry/syscalls/syscall_64.tbl --- tools/perf/arch/x86/entry/syscalls/syscall_64.tbl 2018-08-13 15:49:50.896585176 -0300 +++ arch/x86/entry/syscalls/syscall_64.tbl 2018-07-20 12:04:04.536858304 -0300 @@ -342,6 +342,7 @@ 331 common pkey_free __x64_sys_pkey_free 332 common statx __x64_sys_statx 333 common io_pgetevents __x64_sys_io_pgetevents +334 common rseq __x64_sys_rseq # # x32-specific system call numbers start at 512 to avoid cache impact $ Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Kapshuk <alexander.kapshuk@gmail.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180813111504.3568-2-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Make check-headers.sh check based on kernel dirJiri Olsa2018-08-141-3/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Changing the logic to compare files with paths relative to kernel source base dir. This way we can keep the output message for 2 unrelated files, which is coming in following patch. Committer testing: Remove a line from tools/arch/x86/lib/memcpy_64.S to have it detected: make: Entering directory '/home/acme/git/perf/tools/perf' BUILD: Doing 'make -j4' parallel build Warning: Kernel ABI header at 'tools/arch/x86/lib/memcpy_64.S' differs from latest version at 'arch/x86/lib/memcpy_64.S' diff -u tools/arch/x86/lib/memcpy_64.S arch/x86/lib/memcpy_64.S INSTALL GTK UI INSTALL binaries Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Kapshuk <alexander.kapshuk@gmail.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180813111504.3568-1-jolsa@kernel.org Link: http://lkml.kernel.org/r/20180814072726.GA13931@krava [ Do not use pushd/popd, its a bashism, reported by Michael Ellerman, fixed by Jiri Olsa ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Fix check-headers.sh AND list path of executionAlexander Kapshuk2018-08-131-2/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The '||' path of execution in the 'test' block of the check_2() function may also be taken if file2 does not exist, in which case the warning message about the ABI headers being different would still be printed where it should not be. See below. % file1=file1; file2=file2 % cmd="echo diff $file1 $file2" % test -f $file2 && \ eval $cmd || echo "Warning: Kernel ABI header at 'tools/$file1' differs from latest version at '$file2'" >&2 Warning: Kernel ABI header at 'tools/file1' differs from latest version at 'file2' The proposed patch converts the code following the '&&' operator into a compound list to be executed in the current process environment only if file2 does exist. Should the files being compared differ, a diff command to compare the files concerned is printed on standard output. E.g. $ diff -u tools/arch/x86/lib/memcpy_64.S arch/x86/lib/memcpy_64.S Committer testing: Remove a line from that tools/arch/x86/lib/memcpy_64.S file to test this: BUILD: Doing 'make -j4' parallel build Warning: Kernel ABI header at 'tools/arch/x86/lib/memcpy_64.S' differs from latest version at 'arch/x86/lib/memcpy_64.S' diff -u tools/arch/x86/lib/memcpy_64.S arch/x86/lib/memcpy_64.S CC /tmp/build/perf/bench/mem-memcpy-x86-64-asm.o Signed-off-by: Alexander Kapshuk <alexander.kapshuk@gmail.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180811083915.17471-1-alexander.kapshuk@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf tools: Check for null when copying nsinfo.Benno Evers2018-08-131-0/+3
| | | | | | | | | | | | | | | | | | | | | The argument to nsinfo__copy() was assumed to be valid, but some code paths exist that will lead to NULL being passed. In particular, running 'perf script -D' on a perf.data file containing an PERF_RECORD_MMAP event associating the '[vdso]' dso with pid 0 earlier in the event stream will lead to a segfault. Since all calling code is already checking for a non-null return value, just return NULL for this case as well. Signed-off-by: Benno Evers <bevers@mesosphere.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Krister Johansen <kjlx@templeofstupid.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180810133614.9925-1-bevers@mesosphere.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* tools lib traceevent, perf tools: Rename 'enum pevent_flag' to 'enum tep_flag'Tzvetomir Stoyanov (VMware)2018-08-133-3/+3
| | | | | | | | | | | | | | | | In order to make libtraceevent into a proper library, variables, data structures and functions require a unique prefix to prevent name space conflicts. That prefix will be "tep_" and not "pevent_". This changes pevent_get_page_size API and enum pevent_flag to enum tep_flag Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com> Cc: linux-trace-devel@vger.kernel.org Link: http://lkml.kernel.org/r/20180808180701.623942406@goodmis.org Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* tools lib traceevent, perf tools: Rename traceevent_* APIsTzvetomir Stoyanov (VMware)2018-08-131-3/+3
| | | | | | | | | | | | | | | | | In order to make libtraceevent into a proper library, variables, data structures and functions require a unique prefix to prevent name space conflicts. That prefix will be "tep_" and not "traceevent_". This changes APIs: traceevent_host_bigendian, traceevent_load_plugins and traceevent_unload_plugins Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com> Cc: linux-trace-devel@vger.kernel.org Link: http://lkml.kernel.org/r/20180808180701.484691639@goodmis.org Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* tools lib traceevent, perf tools: Rename pevent_set_* APIsTzvetomir Stoyanov (VMware)2018-08-135-18/+18
| | | | | | | | | | | | | | | | | | In order to make libtraceevent into a proper library, variables, data structures and functions require a unique prefix to prevent name space conflicts. That prefix will be "tep_" and not "pevent_". This changes APIs: pevent_set_file_bigendian, pevent_set_flag, pevent_set_function_resolver, pevent_set_host_bigendian, pevent_set_long_size, pevent_set_page_size and pevent_get_long_size Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com> Cc: linux-trace-devel@vger.kernel.org Link: http://lkml.kernel.org/r/20180808180701.256265951@goodmis.org Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* tools lib traceevent, perf tools: Rename pevent_register_* APIsTzvetomir Stoyanov (VMware)2018-08-131-2/+2
| | | | | | | | | | | | | | | | In order to make libtraceevent into a proper library, variables, data structures and functions require a unique prefix to prevent name space conflicts. That prefix will be "tep_" and not "pevent_". This changes APIs: pevent_register_comm, pevent_register_print_string Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com> Cc: linux-trace-devel@vger.kernel.org Link: http://lkml.kernel.org/r/20180808180700.948980691@goodmis.org Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* tools lib traceevent, perf tools: Rename pevent_read_number_* APIsTzvetomir Stoyanov (VMware)2018-08-135-12/+12
| | | | | | | | | | | | | | | | In order to make libtraceevent into a proper library, variables, data structures and functions require a unique prefix to prevent name space conflicts. That prefix will be "tep_" and not "pevent_". This changes APIs: pevent_read_number, pevent_read_number_field Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com> Cc: linux-trace-devel@vger.kernel.org Link: http://lkml.kernel.org/r/20180808180700.804271434@goodmis.org Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* tools lib traceevent, perf tools: Rename pevent print APIsTzvetomir Stoyanov (VMware)2018-08-132-5/+5
| | | | | | | | | | | | | | | | | In order to make libtraceevent into a proper library, variables, data structures and functions require a unique prefix to prevent name space conflicts. That prefix will be "tep_" and not "pevent_". This changes APIs: pevent_print_field, pevent_print_fields, pevent_print_funcs, pevent_print_printk Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com> Cc: linux-trace-devel@vger.kernel.org Link: http://lkml.kernel.org/r/20180808180700.654453763@goodmis.org Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* tools lib traceevent, perf tools: Rename pevent parse APIsTzvetomir Stoyanov (VMware)2018-08-133-5/+5
| | | | | | | | | | | | | | | | In order to make libtraceevent into a proper library, variables, data structures and functions require a unique prefix to prevent name space conflicts. That prefix will be "tep_" and not "pevent_". This changes APIs: pevent_parse_event, pevent_parse_format, pevent_parse_header_page Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com> Cc: linux-trace-devel@vger.kernel.org Link: http://lkml.kernel.org/r/20180808180700.469749700@goodmis.org Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* tools lib traceevent, perf tools: Rename pevent find APIsTzvetomir Stoyanov (VMware)2018-08-136-8/+8
| | | | | | | | | | | | | | | | | In order to make libtraceevent into a proper library, variables, data structures and functions require a unique prefix to prevent name space conflicts. That prefix will be "tep_" and not "pevent_". This changes APIs: pevent_find_any_field, pevent_find_common_field, pevent_find_event, pevent_find_field Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com> Cc: linux-trace-devel@vger.kernel.org Link: http://lkml.kernel.org/r/20180808180700.316995920@goodmis.org Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* tools lib traceevent, perf tools: Rename pevent alloc / free APIsTzvetomir Stoyanov (VMware)2018-08-135-7/+7
| | | | | | | | | | | | | | | | In order to make libtraceevent into a proper library, variables, data structures and functions require a unique prefix to prevent name space conflicts. That prefix will be "tep_" and not "pevent_". This changes APIs: pevent_alloc, pevent_free, pevent_event_info and pevent_func_resolver_t Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com> Cc: linux-trace-devel@vger.kernel.org Link: http://lkml.kernel.org/r/20180808180700.152609945@goodmis.org Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* tools lib traceevent, perf tools: Rename 'struct pevent_record' to 'struct ↵Tzvetomir Stoyanov (VMware)2018-08-133-3/+3
| | | | | | | | | | | | | | | | | | tep_record' In order to make libtraceevent into a proper library, variables, data structures and functions require a unique prefix to prevent name space conflicts. That prefix will be "tep_" and not "pevent_". This changes the 'struct pevent_record' to 'struct tep_record'. Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com> Cc: linux-trace-devel@vger.kernel.org Link: http://lkml.kernel.org/r/20180808180659.866021298@goodmis.org Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* tools lib traceevent, perf tools: Rename struct pevent to struct tep_handleTzvetomir Stoyanov (VMware)2018-08-1010-38/+38
| | | | | | | | | | | | | | | | In order to make libtraceevent into a proper library, variables, data structures and functions require a unique prefix to prevent name space conflicts. That prefix will be "tep_" and not "pevent_". This changes the struct pevent to struct tep_handle. Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com> Cc: linux-trace-devel@vger.kernel.org Link: http://lkml.kernel.org/r/20180808180659.706175783@goodmis.org Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf probe powerpc: Fix trace event post-processingSandipan Das2018-08-091-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In some cases, a symbol may have multiple aliases. Attempting to add an entry probe for such symbols results in a probe being added at an incorrect location while it fails altogether for return probes. This is only applicable for binaries with debug information. During the arch-dependent post-processing, the offset from the start of the symbol at which the probe is to be attached is determined and added to the start address of the symbol to get the probe's location. In case there are multiple aliases, this offset gets added multiple times for each alias of the symbol and we end up with an incorrect probe location. This can be verified on a powerpc64le system as shown below. $ nm /lib/modules/$(uname -r)/build/vmlinux | grep "sys_open$" ... c000000000414290 T __se_sys_open c000000000414290 T sys_open $ objdump -d /lib/modules/$(uname -r)/build/vmlinux | grep -A 10 "<__se_sys_open>:" c000000000414290 <__se_sys_open>: c000000000414290: 19 01 4c 3c addis r2,r12,281 c000000000414294: 70 c4 42 38 addi r2,r2,-15248 c000000000414298: a6 02 08 7c mflr r0 c00000000041429c: e8 ff a1 fb std r29,-24(r1) c0000000004142a0: f0 ff c1 fb std r30,-16(r1) c0000000004142a4: f8 ff e1 fb std r31,-8(r1) c0000000004142a8: 10 00 01 f8 std r0,16(r1) c0000000004142ac: c1 ff 21 f8 stdu r1,-64(r1) c0000000004142b0: 78 23 9f 7c mr r31,r4 c0000000004142b4: 78 1b 7e 7c mr r30,r3 For both the entry probe and the return probe, the probe location should be _text+4276888 (0xc000000000414298). Since another alias exists for 'sys_open', the post-processing code will end up adding the offset (8 for powerpc64le) twice and perf will attempt to add the probe at _text+4276896 (0xc0000000004142a0) instead. Before: # perf probe -v -a sys_open probe-definition(0): sys_open symbol:sys_open file:(null) line:0 offset:0 return:0 lazy:(null) 0 arguments Looking at the vmlinux_path (8 entries long) Using /lib/modules/4.18.0-rc8+/build/vmlinux for symbols Open Debuginfo file: /lib/modules/4.18.0-rc8+/build/vmlinux Try to find probe point from debuginfo. Symbol sys_open address found : c000000000414290 Matched function: __se_sys_open [2ad03a0] Probe point found: __se_sys_open+0 Found 1 probe_trace_events. Opening /sys/kernel/debug/tracing/kprobe_events write=1 Writing event: p:probe/sys_open _text+4276896 Added new event: probe:sys_open (on sys_open) ... # perf probe -v -a sys_open%return $retval probe-definition(0): sys_open%return symbol:sys_open file:(null) line:0 offset:0 return:1 lazy:(null) 0 arguments Looking at the vmlinux_path (8 entries long) Using /lib/modules/4.18.0-rc8+/build/vmlinux for symbols Open Debuginfo file: /lib/modules/4.18.0-rc8+/build/vmlinux Try to find probe point from debuginfo. Symbol sys_open address found : c000000000414290 Matched function: __se_sys_open [2ad03a0] Probe point found: __se_sys_open+0 Found 1 probe_trace_events. Opening /sys/kernel/debug/tracing/README write=0 Opening /sys/kernel/debug/tracing/kprobe_events write=1 Parsing probe_events: p:probe/sys_open _text+4276896 Group:probe Event:sys_open probe:p Writing event: r:probe/sys_open__return _text+4276896 Failed to write event: Invalid argument Error: Failed to add events. Reason: Invalid argument (Code: -22) After: # perf probe -v -a sys_open probe-definition(0): sys_open symbol:sys_open file:(null) line:0 offset:0 return:0 lazy:(null) 0 arguments Looking at the vmlinux_path (8 entries long) Using /lib/modules/4.18.0-rc8+/build/vmlinux for symbols Open Debuginfo file: /lib/modules/4.18.0-rc8+/build/vmlinux Try to find probe point from debuginfo. Symbol sys_open address found : c000000000414290 Matched function: __se_sys_open [2ad03a0] Probe point found: __se_sys_open+0 Found 1 probe_trace_events. Opening /sys/kernel/debug/tracing/kprobe_events write=1 Writing event: p:probe/sys_open _text+4276888 Added new event: probe:sys_open (on sys_open) ... # perf probe -v -a sys_open%return $retval probe-definition(0): sys_open%return symbol:sys_open file:(null) line:0 offset:0 return:1 lazy:(null) 0 arguments Looking at the vmlinux_path (8 entries long) Using /lib/modules/4.18.0-rc8+/build/vmlinux for symbols Open Debuginfo file: /lib/modules/4.18.0-rc8+/build/vmlinux Try to find probe point from debuginfo. Symbol sys_open address found : c000000000414290 Matched function: __se_sys_open [2ad03a0] Probe point found: __se_sys_open+0 Found 1 probe_trace_events. Opening /sys/kernel/debug/tracing/README write=0 Opening /sys/kernel/debug/tracing/kprobe_events write=1 Parsing probe_events: p:probe/sys_open _text+4276888 Group:probe Event:sys_open probe:p Writing event: r:probe/sys_open__return _text+4276888 Added new event: probe:sys_open__return (on sys_open%return) ... Reported-by: Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Sandipan Das <sandipan@linux.ibm.com> Acked-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Cc: Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Fixes: 99e608b5954c ("perf probe ppc64le: Fix probe location when using DWARF") Link: http://lkml.kernel.org/r/20180809161929.35058-1-sandipan@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf map: Optimize maps__fixup_overlappings()Konstantin Khlebnikov2018-08-082-19/+26
| | | | | | | | | | | | | | | This function splits and removes overlapping areas. Maps in tree are ordered by start address thus we could find first overlap and stop if next map does not overlap. Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/153365189407.435244.7234821822450484712.stgit@buzz Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf map: Synthesize maps only for thread group leaderKonstantin Khlebnikov2018-08-081-3/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Threads share map_groups, all map events are merged into it. Thus we could send mmaps only for thread group leader. Otherwise it took ages to attach and record something from processes with many vmas and threads. Thread group leader could be already dead, but it seems perf cannot handle this case anyway. Testing dummy: #include <stdio.h> #include <stdlib.h> #include <sys/mman.h> #include <pthread.h> #include <unistd.h> void *thread(void *arg) { pause(); } int main(int argc, char **argv) { int threads = 10000; int vmas = 50000; pthread_t th; for (int i = 0; i < threads; i++) pthread_create(&th, NULL, thread, NULL); for (int i = 0; i < vmas; i++) mmap(NULL, 4096, (i & 1) ? PROT_READ : PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE, -1, 0); sleep(60); return 0; } Comment by Jiri Olsa: We actualy synthesize the group leader (if we found one) for the thread even if it's not present in the thread_map, so the process maps are always in data. Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/153363294102.396323.6277944760215058174.stgit@buzz Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf trace: Wire up the augmented syscalls with the syscalls:sys_enter_FOO ↵Arnaldo Carvalho de Melo2018-08-081-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | beautifier We just check that the evsel is the one we associated with the bpf-output event associated with the "__augmented_syscalls__" eBPF map, to show that the formatting is done properly: # perf trace -e perf/tools/perf/examples/bpf/augmented_syscalls.c,openat cat /etc/passwd > /dev/null 0.000 ( ): __augmented_syscalls__:dfd: CWD, filename: 0x43e06da8, flags: CLOEXEC 0.006 ( ): syscalls:sys_enter_openat:dfd: CWD, filename: 0x43e06da8, flags: CLOEXEC 0.007 ( 0.004 ms): cat/11486 openat(dfd: CWD, filename: 0x43e06da8, flags: CLOEXEC ) = 3 0.029 ( ): __augmented_syscalls__:dfd: CWD, filename: 0x4400ece0, flags: CLOEXEC 0.030 ( ): syscalls:sys_enter_openat:dfd: CWD, filename: 0x4400ece0, flags: CLOEXEC 0.031 ( 0.004 ms): cat/11486 openat(dfd: CWD, filename: 0x4400ece0, flags: CLOEXEC ) = 3 0.249 ( ): __augmented_syscalls__:dfd: CWD, filename: 0xc3700d6 0.250 ( ): syscalls:sys_enter_openat:dfd: CWD, filename: 0xc3700d6 0.252 ( 0.003 ms): cat/11486 openat(dfd: CWD, filename: 0xc3700d6 ) = 3 # Now we just need to get the full blown enter/exit handlers to check if the evsel being processed is the augmented_syscalls one to go pick the pointer payloads from the end of the payload. We also need to state somehow what is the layout for multi pointer arg syscalls. Also handy would be to have a BTF file with the struct definitions used in syscalls, compact, generated at kernel built time and available for use in eBPF programs. Till we get there we can go on doing some manual coupling of the most relevant syscalls with some hand built beautifiers. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-r6ba5izrml82nwfmwcp7jpkm@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf trace: Setup the augmented syscalls bpf-output event fieldsArnaldo Carvalho de Melo2018-08-081-1/+33
| | | | | | | | | | | | | | | | | The payload that is put in place by the eBPF script attached to syscalls:sys_enter_openat (and other syscalls with pointers, in the future) can be consumed by the existing sys_enter beautifiers if evsel->priv is setup with a struct syscall_tp with struct tp_fields for the 'syscall_id' and 'args' fields expected by the beautifiers, this patch does just that. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-xfjyog8oveg2fjys9r1yy1es@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf bpf: Make bpf__setup_output_event() return the bpf-output eventArnaldo Carvalho de Melo2018-08-083-18/+21
| | | | | | | | | | | | | | We're calling it to setup that event, and we'll need it later to decide if the bpf-output event we're handling is the one setup for a specific purpose, return it using ERR_PTR, etc. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-zhachv7il2n1lopt9aonwhu7@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf trace: Handle "bpf-output" events associated with ↵Arnaldo Carvalho de Melo2018-08-082-0/+62
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | "__augmented_syscalls__" BPF map Add an example BPF script that writes syscalls:sys_enter_openat raw tracepoint payloads augmented with the first 64 bytes of the "filename" syscall pointer arg. Then catch it and print it just like with things written to the "__bpf_stdout__" map associated with a PERF_COUNT_SW_BPF_OUTPUT software event, by just letting the default tracepoint handler in 'perf trace', trace__event_handler(), to use bpf_output__fprintf(trace, sample), just like it does with all other PERF_COUNT_SW_BPF_OUTPUT events, i.e. just do a dump on the payload, so that we can check if what is being printed has at least the first 64 bytes of the "filename" arg: The augmented_syscalls.c eBPF script: # cat tools/perf/examples/bpf/augmented_syscalls.c // SPDX-License-Identifier: GPL-2.0 #include <stdio.h> struct bpf_map SEC("maps") __augmented_syscalls__ = { .type = BPF_MAP_TYPE_PERF_EVENT_ARRAY, .key_size = sizeof(int), .value_size = sizeof(u32), .max_entries = __NR_CPUS__, }; struct syscall_enter_openat_args { unsigned long long common_tp_fields; long syscall_nr; long dfd; char *filename_ptr; long flags; long mode; }; struct augmented_enter_openat_args { struct syscall_enter_openat_args args; char filename[64]; }; int syscall_enter(openat)(struct syscall_enter_openat_args *args) { struct augmented_enter_openat_args augmented_args; probe_read(&augmented_args.args, sizeof(augmented_args.args), args); probe_read_str(&augmented_args.filename, sizeof(augmented_args.filename), args->filename_ptr); perf_event_output(args, &__augmented_syscalls__, BPF_F_CURRENT_CPU, &augmented_args, sizeof(augmented_args)); return 1; } license(GPL); # So it will just prepare a raw_syscalls:sys_enter payload for the "openat" syscall. This will eventually be done for all syscalls with pointer args, globally or just when the user asks, using some spec, which args of which syscalls it wants "expanded" this way, we'll probably start with just all the syscalls that have char * pointers with familiar names, the ones we already handle with the probe:vfs_getname kprobe if it is in place hooking the kernel getname_flags() function used to copy from user the paths. Running it we get: # perf trace -e perf/tools/perf/examples/bpf/augmented_syscalls.c,openat cat /etc/passwd > /dev/null 0.000 ( ): __augmented_syscalls__:X?.C......................`\..................../etc/ld.so.cache..#......,....ao.k...............k......1."......... 0.006 ( ): syscalls:sys_enter_openat:dfd: CWD, filename: 0x5c600da8, flags: CLOEXEC 0.008 ( 0.005 ms): cat/31292 openat(dfd: CWD, filename: 0x5c600da8, flags: CLOEXEC ) = 3 0.036 ( ): __augmented_syscalls__:X?.C.......................\..................../lib64/libc.so.6......... .\....#........?.......=.C..../."......... 0.037 ( ): syscalls:sys_enter_openat:dfd: CWD, filename: 0x5c808ce0, flags: CLOEXEC 0.039 ( 0.007 ms): cat/31292 openat(dfd: CWD, filename: 0x5c808ce0, flags: CLOEXEC ) = 3 0.323 ( ): __augmented_syscalls__:X?.C.....................P....................../etc/passwd......>.C....@................>.C.....,....ao.>.C........ 0.325 ( ): syscalls:sys_enter_openat:dfd: CWD, filename: 0xe8be50d6 0.327 ( 0.004 ms): cat/31292 openat(dfd: CWD, filename: 0xe8be50d6 ) = 3 # We need to go on optimizing this to avoid seding trash or zeroes in the pointer content payload, using the return from bpf_probe_read_str(), but to keep things simple at this stage and make incremental progress, lets leave it at that for now. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-g360n1zbj6bkbk6q0qo11c28@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf bpf: Add wrappers to BPF_FUNC_probe_read(_str) functionsArnaldo Carvalho de Melo2018-08-081-0/+3
| | | | | | | | | | | | | | | Will be used shortly in the augmented syscalls work together with a PERF_COUNT_SW_BPF_OUTPUT software event to insert syscalls + pointer contents in the perf ring buffer, to be consumed by 'perf trace' beautifiers. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-ajlkpz4cd688ulx1u30htkj3@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf bpf: Add bpf__setup_output_event() strerror() counterpartArnaldo Carvalho de Melo2018-08-082-8/+11
| | | | | | | | | | | | | That is just bpf__strerror_setup_stdout() renamed to the more general "setup_output_event" method, keep the existing stdout() as a wrapper. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-nwnveo428qn0b48axj50vkc7@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf bpf: Generalize bpf__setup_stdout()Arnaldo Carvalho de Melo2018-08-082-9/+24
| | | | | | | | | | | | | We will use it to set up other bpf-output events, for instance to generate augmented syscall entry tracepoints with pointer contents. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-4r7kw0nsyi4vyz6xm1tzx6a3@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf bpf: Make bpf__for_each_stdout_map() genericArnaldo Carvalho de Melo2018-08-081-2/+5
| | | | | | | | | | | | | | | By passing a 'name' arg, that will eventually be used to setup more "bpf-output" events, e.g. to create a event where to create raw_syscalls like events that in addition to the syscall arguments will also copy the pointer contents being passed from/to userspace. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-talrnxps9p3qozk3aeh91fgv@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf bpf: Add bpf/stdio.h wrapper to bpf_perf_event_output functionArnaldo Carvalho de Melo2018-08-082-0/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | That, together with the map __bpf_output__ that is already handled by 'perf trace' to print that event's contents as strings provides a debugging facility, to show it in use, print a simple string everytime the syscalls:sys_enter_openat() syscall tracepoint is hit: # cat tools/perf/examples/bpf/hello.c #include <stdio.h> int syscall_enter(openat)(void *args) { puts("Hello, world\n"); return 0; } license(GPL); # # perf trace -e openat,tools/perf/examples/bpf/hello.c cat /etc/passwd > /dev/null 0.016 ( ): __bpf_stdout__:Hello, world 0.018 ( 0.010 ms): cat/9079 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC) = 3 0.057 ( ): __bpf_stdout__:Hello, world 0.059 ( 0.011 ms): cat/9079 openat(dfd: CWD, filename: /lib64/libc.so.6, flags: CLOEXEC) = 3 0.417 ( ): __bpf_stdout__:Hello, world 0.419 ( 0.009 ms): cat/9079 openat(dfd: CWD, filename: /etc/passwd) = 3 # This is part of an ongoing experimentation on making eBPF scripts as consumed by perf to be as concise as possible and using familiar concepts such as stdio.h functions, that end up just wrapping the existing BPF functions, trying to hide as much boilerplate as possible while using just conventions and C preprocessor tricks. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-4tiaqlx5crf0fwpe7a6j84x7@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf bpf: Add struct bpf_map structArnaldo Carvalho de Melo2018-08-081-0/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A helper structure used by eBPF C program to describe map attributes to elf_bpf loader, to be used initially by the special __bpf_stdout__ map used to print strings into the perf ring buffer in BPF scripts, e.g.: Using the upcoming stdio.h and puts() macros to use the __bpf_stdout__ map to add strings to the ring buffer: # cat tools/perf/examples/bpf/hello.c #include <stdio.h> int syscall_enter(openat)(void *args) { puts("Hello, world\n"); return 0; } license(GPL); # # cat ~/.perfconfig [llvm] dump-obj = true # perf trace -e openat,tools/perf/examples/bpf/hello.c/call-graph=dwarf/ cat /etc/passwd > /dev/null LLVM: dumping tools/perf/examples/bpf/hello.o 0.016 ( ): __bpf_stdout__:Hello, world 0.018 ( 0.010 ms): cat/9079 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC ) = 3 0.057 ( ): __bpf_stdout__:Hello, world 0.059 ( 0.011 ms): cat/9079 openat(dfd: CWD, filename: /lib64/libc.so.6, flags: CLOEXEC ) = 3 0.417 ( ): __bpf_stdout__:Hello, world 0.419 ( 0.009 ms): cat/9079 openat(dfd: CWD, filename: /etc/passwd ) = 3 # # file tools/perf/examples/bpf/hello.o tools/perf/examples/bpf/hello.o: ELF 64-bit LSB relocatable, *unknown arch 0xf7* version 1 (SYSV), not stripped # readelf -SW tools/perf/examples/bpf/hello.o There are 10 section headers, starting at offset 0x208: Section Headers: [Nr] Name Type Address Off Size ES Flg Lk Inf Al [ 0] NULL 0000000000000000 000000 000000 00 0 0 0 [ 1] .strtab STRTAB 0000000000000000 000188 00007f 00 0 0 1 [ 2] .text PROGBITS 0000000000000000 000040 000000 00 AX 0 0 4 [ 3] syscalls:sys_enter_openat PROGBITS 0000000000000000 000040 000088 00 AX 0 0 8 [ 4] .relsyscalls:sys_enter_openat REL 0000000000000000 000178 000010 10 9 3 8 [ 5] maps PROGBITS 0000000000000000 0000c8 00001c 00 WA 0 0 4 [ 6] .rodata.str1.1 PROGBITS 0000000000000000 0000e4 00000e 01 AMS 0 0 1 [ 7] license PROGBITS 0000000000000000 0000f2 000004 00 WA 0 0 1 [ 8] version PROGBITS 0000000000000000 0000f8 000004 00 WA 0 0 4 [ 9] .symtab SYMTAB 0000000000000000 000100 000078 18 1 1 8 Key to Flags: W (write), A (alloc), X (execute), M (merge), S (strings), I (info), L (link order), O (extra OS processing required), G (group), T (TLS), C (compressed), x (unknown), o (OS specific), E (exclude), p (processor specific) # readelf -s tools/perf/examples/bpf/hello.o Symbol table '.symtab' contains 5 entries: Num: Value Size Type Bind Vis Ndx Name 0: 0000000000000000 0 NOTYPE LOCAL DEFAULT UND 1: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 5 __bpf_stdout__ 2: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 7 _license 3: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 8 _version 4: 0000000000000000 0 NOTYPE GLOBAL DEFAULT 3 syscall_enter_openat # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-81fg60om2ifnatsybzwmiga3@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
* perf report: Add --percent-type optionJiri Olsa2018-08-082-0/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | Set annotation percent type from following choices: global-period, local-period, global-hits, local-hits With following report option setup the percent type will be passed to annotation browser: $ perf report --percent-type period-local The local/global keywords set if the percentage is computed in the scope of the function (local) or the whole data (global). The period/hits keywords set the base the percentage is computed on - the samples period or the number of samples (hits). Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/20180804130521.11408-21-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 23:23:20 +0000