Re: [PATCH v2 bpf-next 3/4] selftests/bpf: Add profiler test
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From: Jiri Olsa <hidden>
Date: 2020-10-13 19:56:35
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bpf
On Thu, Oct 08, 2020 at 06:12:39PM -0700, Alexei Starovoitov wrote: SNIP
quoted hunk ↗ jump to hunk
+ +#ifdef UNROLL +#pragma unroll +#endif + for (int i = 0; i < MAX_CGROUPS_PATH_DEPTH; i++) { + filepart_length = + bpf_probe_read_str(payload, MAX_PATH, BPF_CORE_READ(cgroup_node, name)); + if (!cgroup_node) + return payload; + if (cgroup_node == cgroup_root_node) + *root_pos = payload - payload_start; + if (filepart_length <= MAX_PATH) { + barrier_var(filepart_length); + payload += filepart_length; + } + cgroup_node = BPF_CORE_READ(cgroup_node, parent); + } + return payload; +} + +static ino_t get_inode_from_kernfs(struct kernfs_node* node) +{ + struct kernfs_node___52* node52 = (void*)node; + + if (bpf_core_field_exists(node52->id.ino)) { + barrier_var(node52); + return BPF_CORE_READ(node52, id.ino); + } else { + barrier_var(node); + return (u64)BPF_CORE_READ(node, id); + } +} + +int pids_cgrp_id = 1;
hi, I'm getting compilation failure with this: CLNG-LLC [test_maps] profiler2.o In file included from progs/profiler2.c:6: progs/profiler.inc.h:246:5: error: redefinition of 'pids_cgrp_id' as different kind of symbol int pids_cgrp_id = 1; ^ /home/jolsa/linux-qemu/tools/testing/selftests/bpf/tools/include/vmlinux.h:14531:2: note: previous definition is here pids_cgrp_id = 11, ^ 1 error generated. /opt/clang/bin/llc: error: /opt/clang/bin/llc: <stdin>:1:1: error: expected top-level entity BPF obj compilation failed ^ make: *** [Makefile:396: /home/jolsa/linux-qemu/tools/testing/selftests/bpf/profiler2.o] Error 1 jirka