summaryrefslogtreecommitdiffstats
path: root/include/trace/perf.h
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /include/trace/perf.h
parentInitial commit. (diff)
downloadlinux-upstream.tar.xz
linux-upstream.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/trace/perf.h')
-rw-r--r--include/trace/perf.h114
1 files changed, 114 insertions, 0 deletions
diff --git a/include/trace/perf.h b/include/trace/perf.h
new file mode 100644
index 000000000..5800d1314
--- /dev/null
+++ b/include/trace/perf.h
@@ -0,0 +1,114 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#undef TRACE_SYSTEM_VAR
+
+#ifdef CONFIG_PERF_EVENTS
+
+#undef __entry
+#define __entry entry
+
+#undef __get_dynamic_array
+#define __get_dynamic_array(field) \
+ ((void *)__entry + (__entry->__data_loc_##field & 0xffff))
+
+#undef __get_dynamic_array_len
+#define __get_dynamic_array_len(field) \
+ ((__entry->__data_loc_##field >> 16) & 0xffff)
+
+#undef __get_str
+#define __get_str(field) ((char *)__get_dynamic_array(field))
+
+#undef __get_bitmask
+#define __get_bitmask(field) (char *)__get_dynamic_array(field)
+
+#undef __get_sockaddr
+#define __get_sockaddr(field) ((struct sockaddr *)__get_dynamic_array(field))
+
+#undef __get_rel_dynamic_array
+#define __get_rel_dynamic_array(field) \
+ ((void *)__entry + \
+ offsetof(typeof(*__entry), __rel_loc_##field) + \
+ sizeof(__entry->__rel_loc_##field) + \
+ (__entry->__rel_loc_##field & 0xffff))
+
+#undef __get_rel_dynamic_array_len
+#define __get_rel_dynamic_array_len(field) \
+ ((__entry->__rel_loc_##field >> 16) & 0xffff)
+
+#undef __get_rel_str
+#define __get_rel_str(field) ((char *)__get_rel_dynamic_array(field))
+
+#undef __get_rel_bitmask
+#define __get_rel_bitmask(field) (char *)__get_rel_dynamic_array(field)
+
+#undef __get_rel_sockaddr
+#define __get_rel_sockaddr(field) ((struct sockaddr *)__get_rel_dynamic_array(field))
+
+#undef __perf_count
+#define __perf_count(c) (__count = (c))
+
+#undef __perf_task
+#define __perf_task(t) (__task = (t))
+
+#undef DECLARE_EVENT_CLASS
+#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
+static notrace void \
+perf_trace_##call(void *__data, proto) \
+{ \
+ struct trace_event_call *event_call = __data; \
+ struct trace_event_data_offsets_##call __maybe_unused __data_offsets;\
+ struct trace_event_raw_##call *entry; \
+ struct pt_regs *__regs; \
+ u64 __count = 1; \
+ struct task_struct *__task = NULL; \
+ struct hlist_head *head; \
+ int __entry_size; \
+ int __data_size; \
+ int rctx; \
+ \
+ __data_size = trace_event_get_offsets_##call(&__data_offsets, args); \
+ \
+ head = this_cpu_ptr(event_call->perf_events); \
+ if (!bpf_prog_array_valid(event_call) && \
+ __builtin_constant_p(!__task) && !__task && \
+ hlist_empty(head)) \
+ return; \
+ \
+ __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\
+ sizeof(u64)); \
+ __entry_size -= sizeof(u32); \
+ \
+ entry = perf_trace_buf_alloc(__entry_size, &__regs, &rctx); \
+ if (!entry) \
+ return; \
+ \
+ perf_fetch_caller_regs(__regs); \
+ \
+ tstruct \
+ \
+ { assign; } \
+ \
+ perf_trace_run_bpf_submit(entry, __entry_size, rctx, \
+ event_call, __count, __regs, \
+ head, __task); \
+}
+
+/*
+ * This part is compiled out, it is only here as a build time check
+ * to make sure that if the tracepoint handling changes, the
+ * perf probe will fail to compile unless it too is updated.
+ */
+#undef DEFINE_EVENT
+#define DEFINE_EVENT(template, call, proto, args) \
+static inline void perf_test_probe_##call(void) \
+{ \
+ check_trace_callback_type_##call(perf_trace_##template); \
+}
+
+
+#undef DEFINE_EVENT_PRINT
+#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
+ DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
+
+#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
+#endif /* CONFIG_PERF_EVENTS */