From 0b568c865fac195e90f4669bde5af0e236830af2 Mon Sep 17 00:00:00 2001 From: Matt Turner Date: Tue, 8 Sep 2026 22:50:35 -0400 Subject: perf tools: make the GTK4 report browser actually loadable at runtime perf report --gtk dlopen()s libperf-gtk.so, which expects to resolve symbols back against the running perf binary (callchain_param, symbol_conf, evsel__name, and friends live in perf, not the plugin). Two things broke that after the GTK 4 port: perf never passed -rdynamic, so none of its symbols were in its dynamic symbol table for a dlopen()ed plugin to find. Add -rdynamic to LDFLAGS when GTK4 support is enabled. annotated_source__hist_entry() was a static inline in annotate.h, so ui/gtk/annotate.c calling it pulled hashmap__find()'s expansion, hashmap_find(), into libperf-gtk.so as an undefined symbol. The only hashmap_find perf links against normally is libbpf's internal one (tools/lib/bpf/hashmap.c), built with -fvisibility=hidden, so it can never be exported to a dlopen()ed plugin regardless of LDFLAGS. Move annotated_source__hist_entry() into annotate.c as an ordinary exported function, so the plugin depends on it the same way it already depends on evsel__group_desc() and friends. With both fixes, a default 'make GTK4=1' build (libbpf statically linked) can dlopen() libperf-gtk.so and open the report browser without NO_LIBBPF=1 or manual LDFLAGS. Verified with perf report --gtk against real perf.data on a GTK4 desktop. Tested-by: Arnaldo Carvalho de Melo Signed-off-by: Matt Turner Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Makefile.config | 5 +++++ tools/perf/util/annotate.c | 11 +++++++++++ tools/perf/util/annotate.h | 12 ++---------- 3 files changed, 18 insertions(+), 10 deletions(-) diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config index 3e59e2b7eaec..4ee7393a39f9 100644 --- a/tools/perf/Makefile.config +++ b/tools/perf/Makefile.config @@ -785,6 +785,11 @@ ifdef GTK4 GTK_CFLAGS += $(shell $(PKG_CONFIG) --cflags gtk4 2>/dev/null) GTK_LIBS := $(shell $(PKG_CONFIG) --libs gtk4 2>/dev/null) EXTLIBS += -ldl + # libperf-gtk.so is dlopen()ed at runtime and calls back into + # symbols defined in the perf binary itself (callchain_param, + # symbol_conf, evsel__name, ...): perf needs to export those + # dynamically for the plugin to resolve them. + LDFLAGS += -rdynamic endif endif diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c index 9304c21c686a..fd789eb53e74 100644 --- a/tools/perf/util/annotate.c +++ b/tools/perf/util/annotate.c @@ -145,6 +145,17 @@ static int annotated_source__alloc_histograms(struct annotated_source *src, return src->histograms ? 0 : -1; } +struct sym_hist_entry * +annotated_source__hist_entry(struct annotated_source *src, const struct evsel *evsel, u64 offset) +{ + struct sym_hist_entry *entry; + long key = offset << 16 | evsel->core.idx; + + if (!hashmap__find(src->samples, key, &entry)) + return NULL; + return entry; +} + void symbol__annotate_zero_histograms(struct symbol *sym) { struct annotation *notes = symbol__annotation(sym); diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h index d7807df6667f..4c49d41e73a4 100644 --- a/tools/perf/util/annotate.h +++ b/tools/perf/util/annotate.h @@ -446,16 +446,8 @@ static inline struct sym_hist *annotation__histogram(struct annotation *notes, return annotated_source__histogram(notes->src, evsel); } -static inline struct sym_hist_entry * -annotated_source__hist_entry(struct annotated_source *src, const struct evsel *evsel, u64 offset) -{ - struct sym_hist_entry *entry; - long key = offset << 16 | evsel->core.idx; - - if (!hashmap__find(src->samples, key, &entry)) - return NULL; - return entry; -} +struct sym_hist_entry * +annotated_source__hist_entry(struct annotated_source *src, const struct evsel *evsel, u64 offset); static inline struct annotation *symbol__annotation(struct symbol *sym) { -- cgit v1.2.3