diff options
Diffstat (limited to 'tools/perf/util/bpf_skel/off_cpu.bpf.c')
| -rw-r--r-- | tools/perf/util/bpf_skel/off_cpu.bpf.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/tools/perf/util/bpf_skel/off_cpu.bpf.c b/tools/perf/util/bpf_skel/off_cpu.bpf.c index 792ae2847080..cc6d7fd55118 100644 --- a/tools/perf/util/bpf_skel/off_cpu.bpf.c +++ b/tools/perf/util/bpf_skel/off_cpu.bpf.c @@ -71,6 +71,11 @@ struct { __uint(max_entries, 1); } cgroup_filter SEC(".maps"); +/* new kernel task_struct definition */ +struct task_struct___new { + long __state; +} __attribute__((preserve_access_index)); + /* old kernel task_struct definition */ struct task_struct___old { long state; @@ -93,14 +98,17 @@ const volatile bool uses_cgroup_v1 = false; */ static inline int get_task_state(struct task_struct *t) { - if (bpf_core_field_exists(t->__state)) - return BPF_CORE_READ(t, __state); + /* recast pointer to capture new type for compiler */ + struct task_struct___new *t_new = (void *)t; - /* recast pointer to capture task_struct___old type for compiler */ - struct task_struct___old *t_old = (void *)t; + if (bpf_core_field_exists(t_new->__state)) { + return BPF_CORE_READ(t_new, __state); + } else { + /* recast pointer to capture old type for compiler */ + struct task_struct___old *t_old = (void *)t; - /* now use old "state" name of the field */ - return BPF_CORE_READ(t_old, state); + return BPF_CORE_READ(t_old, state); + } } static inline __u64 get_cgroup_id(struct task_struct *t) |