From: Masami Hiramatsu mhiramat@kernel.org
[ Upstream commit 55de2c0b5610cba5a5a93c0788031133c457e689 ]
Add '__rel_loc' using trace event macros. These macros are usually not used in the kernel, except for testing purpose. This also add "rel_" variant of macros for dynamic_array string, and bitmask.
Link: https://lkml.kernel.org/r/163757342119.510314.816029622439099016.stgit@devno...
Cc: Beau Belgrave beaub@linux.microsoft.com Cc: Namhyung Kim namhyung@kernel.org Cc: Tom Zanussi zanussi@kernel.org Signed-off-by: Masami Hiramatsu mhiramat@kernel.org Signed-off-by: Steven Rostedt (VMware) rostedt@goodmis.org Signed-off-by: Sasha Levin sashal@kernel.org --- include/trace/bpf_probe.h | 16 +++++ include/trace/perf.h | 16 +++++ include/trace/trace_events.h | 120 ++++++++++++++++++++++++++++++++++- kernel/trace/trace.h | 3 + 4 files changed, 153 insertions(+), 2 deletions(-)
diff --git a/include/trace/bpf_probe.h b/include/trace/bpf_probe.h index a23be89119aa..04939b2d2f19 100644 --- a/include/trace/bpf_probe.h +++ b/include/trace/bpf_probe.h @@ -21,6 +21,22 @@ #undef __get_bitmask #define __get_bitmask(field) (char *)__get_dynamic_array(field)
+#undef __get_rel_dynamic_array +#define __get_rel_dynamic_array(field) \ + ((void *)(&__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 __perf_count #define __perf_count(c) (c)
diff --git a/include/trace/perf.h b/include/trace/perf.h index dbc6c74defc3..ea4405de175a 100644 --- a/include/trace/perf.h +++ b/include/trace/perf.h @@ -21,6 +21,22 @@ #undef __get_bitmask #define __get_bitmask(field) (char *)__get_dynamic_array(field)
+#undef __get_rel_dynamic_array +#define __get_rel_dynamic_array(field) \ + ((void *)(&__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 __perf_count #define __perf_count(c) (__count = (c))
diff --git a/include/trace/trace_events.h b/include/trace/trace_events.h index 08810a463880..8c6f7c433518 100644 --- a/include/trace/trace_events.h +++ b/include/trace/trace_events.h @@ -108,6 +108,18 @@ TRACE_MAKE_SYSTEM_STR(); #undef __bitmask #define __bitmask(item, nr_bits) __dynamic_array(char, item, -1)
+#undef __rel_dynamic_array +#define __rel_dynamic_array(type, item, len) u32 __rel_loc_##item; + +#undef __rel_string +#define __rel_string(item, src) __rel_dynamic_array(char, item, -1) + +#undef __rel_string_len +#define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, -1) + +#undef __rel_bitmask +#define __rel_bitmask(item, nr_bits) __rel_dynamic_array(char, item, -1) + #undef TP_STRUCT__entry #define TP_STRUCT__entry(args...) args
@@ -200,11 +212,23 @@ TRACE_MAKE_SYSTEM_STR(); #undef __string #define __string(item, src) __dynamic_array(char, item, -1)
+#undef __bitmask +#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1) + #undef __string_len #define __string_len(item, src, len) __dynamic_array(char, item, -1)
-#undef __bitmask -#define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1) +#undef __rel_dynamic_array +#define __rel_dynamic_array(type, item, len) u32 item; + +#undef __rel_string +#define __rel_string(item, src) __rel_dynamic_array(char, item, -1) + +#undef __rel_string_len +#define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, -1) + +#undef __rel_bitmask +#define __rel_bitmask(item, nr_bits) __rel_dynamic_array(unsigned long, item, -1)
#undef DECLARE_EVENT_CLASS #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ @@ -293,6 +317,19 @@ TRACE_MAKE_SYSTEM_STR(); #undef __get_str #define __get_str(field) ((char *)__get_dynamic_array(field))
+#undef __get_rel_dynamic_array +#define __get_rel_dynamic_array(field) \ + ((void *)(&__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_bitmask #define __get_bitmask(field) \ ({ \ @@ -302,6 +339,15 @@ TRACE_MAKE_SYSTEM_STR(); trace_print_bitmask_seq(p, __bitmask, __bitmask_size); \ })
+#undef __get_rel_bitmask +#define __get_rel_bitmask(field) \ + ({ \ + void *__bitmask = __get_rel_dynamic_array(field); \ + unsigned int __bitmask_size; \ + __bitmask_size = __get_rel_dynamic_array_len(field); \ + trace_print_bitmask_seq(p, __bitmask, __bitmask_size); \ + }) + #undef __print_flags #define __print_flags(flag, delim, flag_array...) \ ({ \ @@ -471,6 +517,21 @@ static struct trace_event_functions trace_event_type_funcs_##call = { \ #undef __bitmask #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, -1)
+#undef __rel_dynamic_array +#define __rel_dynamic_array(_type, _item, _len) { \ + .type = "__rel_loc " #_type "[]", .name = #_item, \ + .size = 4, .align = 4, \ + .is_signed = is_signed_type(_type), .filter_type = FILTER_OTHER }, + +#undef __rel_string +#define __rel_string(item, src) __rel_dynamic_array(char, item, -1) + +#undef __rel_string_len +#define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, -1) + +#undef __rel_bitmask +#define __rel_bitmask(item, nr_bits) __rel_dynamic_array(unsigned long, item, -1) + #undef DECLARE_EVENT_CLASS #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, func, print) \ static struct trace_event_fields trace_event_fields_##call[] = { \ @@ -519,6 +580,22 @@ static struct trace_event_fields trace_event_fields_##call[] = { \ #undef __string_len #define __string_len(item, src, len) __dynamic_array(char, item, (len) + 1)
+#undef __rel_dynamic_array +#define __rel_dynamic_array(type, item, len) \ + __item_length = (len) * sizeof(type); \ + __data_offsets->item = __data_size + \ + offsetof(typeof(*entry), __data) - \ + offsetof(typeof(*entry), __rel_loc_##item) - \ + sizeof(u32); \ + __data_offsets->item |= __item_length << 16; \ + __data_size += __item_length; + +#undef __rel_string +#define __rel_string(item, src) __rel_dynamic_array(char, item, \ + strlen((src) ? (const char *)(src) : "(null)") + 1) + +#undef __rel_string_len +#define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, (len) + 1) /* * __bitmask_size_in_bytes_raw is the number of bytes needed to hold * num_possible_cpus(). @@ -542,6 +619,10 @@ static struct trace_event_fields trace_event_fields_##call[] = { \ #define __bitmask(item, nr_bits) __dynamic_array(unsigned long, item, \ __bitmask_size_in_longs(nr_bits))
+#undef __rel_bitmask +#define __rel_bitmask(item, nr_bits) __rel_dynamic_array(unsigned long, item, \ + __bitmask_size_in_longs(nr_bits)) + #undef DECLARE_EVENT_CLASS #define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \ static inline notrace int trace_event_get_offsets_##call( \ @@ -706,6 +787,37 @@ static inline notrace int trace_event_get_offsets_##call( \ #define __assign_bitmask(dst, src, nr_bits) \ memcpy(__get_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits))
+#undef __rel_dynamic_array +#define __rel_dynamic_array(type, item, len) \ + __entry->__rel_loc_##item = __data_offsets.item; + +#undef __rel_string +#define __rel_string(item, src) __rel_dynamic_array(char, item, -1) + +#undef __rel_string_len +#define __rel_string_len(item, src, len) __rel_dynamic_array(char, item, -1) + +#undef __assign_rel_str +#define __assign_rel_str(dst, src) \ + strcpy(__get_rel_str(dst), (src) ? (const char *)(src) : "(null)"); + +#undef __assign_rel_str_len +#define __assign_rel_str_len(dst, src, len) \ + do { \ + memcpy(__get_rel_str(dst), (src), (len)); \ + __get_rel_str(dst)[len] = '\0'; \ + } while (0) + +#undef __rel_bitmask +#define __rel_bitmask(item, nr_bits) __rel_dynamic_array(unsigned long, item, -1) + +#undef __get_rel_bitmask +#define __get_rel_bitmask(field) (char *)__get_rel_dynamic_array(field) + +#undef __assign_rel_bitmask +#define __assign_rel_bitmask(dst, src, nr_bits) \ + memcpy(__get_rel_bitmask(dst), (src), __bitmask_size_in_bytes(nr_bits)) + #undef TP_fast_assign #define TP_fast_assign(args...) args
@@ -770,6 +882,10 @@ static inline void ftrace_test_probe_##call(void) \ #undef __get_dynamic_array_len #undef __get_str #undef __get_bitmask +#undef __get_rel_dynamic_array +#undef __get_rel_dynamic_array_len +#undef __get_rel_str +#undef __get_rel_bitmask #undef __print_array #undef __print_hex_dump
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index d6763366a320..28ea6c0be495 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -83,6 +83,9 @@ enum trace_type { #undef __dynamic_array #define __dynamic_array(type, item) type item[];
+#undef __rel_dynamic_array +#define __rel_dynamic_array(type, item) type item[]; + #undef F_STRUCT #define F_STRUCT(args...) args