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tools lib traceevent: Allow setting an alternative symbol resolver

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The perf tools have a symbol resolver that includes solving kernel
symbols using either kallsyms or ELF symtabs, and it also is using
libtraceevent to format the trace events fields, including via
subsystem specific plugins, like the "timer" one.

To solve fields like "timer:hrtimer_start"'s "function", libtraceevent
needs a way to map from its value to a function name and addr.

This patch provides a way for tools that already have symbol resolving
facilities to ask libtraceevent to use it when needing to resolve
kernel symbols.

Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: David Ahern <dsahern@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-fdx1fazols17w5py26ia3bwh@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2015-07-22 12:36:55 -03:00
parent e6ce712634
commit 33a2471cc9
2 changed files with 75 additions and 1 deletions
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8
tools/lib/traceevent/event-parse.h
View file

@ -453,6 +453,10 @@ struct cmdline_list;
struct func_map;
struct func_list;
struct event_handler;
struct func_resolver;
typedef char *(pevent_func_resolver_t)(void *priv,
unsigned long long *addrp, char **modp);
struct pevent {
int ref_count;
@ -481,6 +485,7 @@ struct pevent {
int cmdline_count;
struct func_map *func_map;
struct func_resolver *func_resolver;
struct func_list *funclist;
unsigned int func_count;
@ -611,6 +616,9 @@ enum trace_flag_type {
TRACE_FLAG_SOFTIRQ = 0x10,
};
int pevent_set_function_resolver(struct pevent *pevent,
pevent_func_resolver_t *func, void *priv);
void pevent_reset_function_resolver(struct pevent *pevent);
int pevent_register_comm(struct pevent *pevent, const char *comm, int pid);
int pevent_register_trace_clock(struct pevent *pevent, const char *trace_clock);
int pevent_register_function(struct pevent *pevent, char *name,