From 959c2199d4c0e330d17f1f5234527e87132d5e07 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Fri, 24 Jul 2015 12:13:05 -0300 Subject: [PATCH] perf python: Remove dependency on 'machine' methods The python binding still doesn't provide symbol resolving facilities, but the recent addition of the trace_event__register_resolver() function made it add as a dependency the machine__resolve_kernel_addr() method, that in turn drags all the symbol resolving code. The problem: [root@zoo ~]# perf test -v python 17: Try 'import perf' in python, checking link problems : --- start --- test child forked, pid 6853 Traceback (most recent call last): File "", line 1, in ImportError: /tmp/build/perf/python/perf.so: undefined symbol: machine__resolve_kernel_addr test child finished with -1 ---- end ---- Try 'import perf' in python, checking link problems: FAILED! [root@zoo ~]# Fix it by requiring this function to receive the resolver as a parameter, just like pevent_register_function_resolver(), i.e. do not explicitely refer to an object file not included in tools/perf/util/python-ext-sources. [root@zoo ~]# perf test python 17: Try 'import perf' in python, checking link problems : Ok [root@zoo ~]# Cc: Adrian Hunter Cc: Borislav Petkov Cc: David Ahern Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Namhyung Kim Cc: Stephane Eranian Fixes: c3168b0db93a ("perf symbols: Provide libtraceevent callback to resolve kernel symbols") Link: http://lkml.kernel.org/n/tip-vxlhh95v2em9zdbgj3jm7xi5@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-trace.c | 2 +- tools/perf/util/trace-event.c | 7 +++---- tools/perf/util/trace-event.h | 3 ++- 3 files changed, 6 insertions(+), 6 deletions(-) diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index 282841b10f24..06cfa93c0305 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -1489,7 +1489,7 @@ static int trace__symbols_init(struct trace *trace, struct perf_evlist *evlist) if (trace->host == NULL) return -ENOMEM; - if (trace_event__register_resolver(trace->host) < 0) + if (trace_event__register_resolver(trace->host, machine__resolve_kernel_addr) < 0) return -errno; err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target, diff --git a/tools/perf/util/trace-event.c b/tools/perf/util/trace-event.c index 667bd109d16f..b90e646c7a91 100644 --- a/tools/perf/util/trace-event.c +++ b/tools/perf/util/trace-event.c @@ -50,14 +50,13 @@ static int trace_event__init2(void) return 0; } -int trace_event__register_resolver(struct machine *machine) +int trace_event__register_resolver(struct machine *machine, + pevent_func_resolver_t *func) { if (!tevent_initialized && trace_event__init2()) return -1; - return pevent_set_function_resolver(tevent.pevent, - machine__resolve_kernel_addr, - machine); + return pevent_set_function_resolver(tevent.pevent, func, machine); } void trace_event__cleanup(struct trace_event *t) diff --git a/tools/perf/util/trace-event.h b/tools/perf/util/trace-event.h index 568128c3284a..da6cc4cc2a4f 100644 --- a/tools/perf/util/trace-event.h +++ b/tools/perf/util/trace-event.h @@ -18,7 +18,8 @@ struct trace_event { int trace_event__init(struct trace_event *t); void trace_event__cleanup(struct trace_event *t); -int trace_event__register_resolver(struct machine *machine); +int trace_event__register_resolver(struct machine *machine, + pevent_func_resolver_t *func); struct event_format* trace_event__tp_format(const char *sys, const char *name); -- GitLab