perf map: Add accessor for start and end

Later changes will add reference count checking for struct map, start
and end are frequently accessed variables. Add an accessor so that the
reference count check is only necessary in one place.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Darren Hart <dvhart@infradead.org>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Hao Luo <haoluo@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Miaoqian Lin <linmq006@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Riccardo Mancini <rickyman7@gmail.com>
Cc: Shunsuke Nakamura <nakamura.shun@fujitsu.com>
Cc: Song Liu <song@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Stephen Brennan <stephen.s.brennan@oracle.com>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Yury Norov <yury.norov@gmail.com>
Link: https://lore.kernel.org/r/20230320212248.1175731-2-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 8 insertions, 7 deletions

diff --git a/tools/perf/util/unwind-libunwind-local.c b/tools/perf/util/unwind-libunwind-local.c
index 108f7b1697a7..1c13f43e7d22 100644
--- a/tools/perf/util/unwind-libunwind-local.c
+++ b/tools/perf/util/unwind-libunwind-local.c
@@ -327,9 +327,10 @@ static int read_unwind_spec_eh_frame(struct dso *dso, struct unwind_info *ui,
 
 	maps__for_each_entry(ui->thread->maps, map_node) {
 		struct map *map = map_node->map;
+		u64 start = map__start(map);
 
-		if (map__dso(map) == dso && map->start < base_addr)
-			base_addr = map->start;
+		if (map__dso(map) == dso && start < base_addr)
+			base_addr = start;
 	}
 	base_addr -= dso->data.elf_base_addr;
 	/* Address of .eh_frame_hdr */
@@ -443,8 +444,8 @@ find_proc_info(unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
 	if (!read_unwind_spec_eh_frame(dso, ui, &table_data, &segbase, &fde_count)) {
 		memset(&di, 0, sizeof(di));
 		di.format   = UNW_INFO_FORMAT_REMOTE_TABLE;
-		di.start_ip = map->start;
-		di.end_ip   = map->end;
+		di.start_ip = map__start(map);
+		di.end_ip   = map__end(map);
 		di.u.rti.segbase    = segbase;
 		di.u.rti.table_data = table_data;
 		di.u.rti.table_len  = fde_count * sizeof(struct table_entry)
@@ -459,7 +460,8 @@ find_proc_info(unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
 	    !read_unwind_spec_debug_frame(dso, ui->machine, &segbase)) {
 		int fd = dso__data_get_fd(dso, ui->machine);
 		int is_exec = elf_is_exec(fd, dso->name);
-		unw_word_t base = is_exec ? 0 : map->start;
+		u64 start = map__start(map);
+		unw_word_t base = is_exec ? 0 : start;
 		const char *symfile;
 
 		if (fd >= 0)
@@ -468,8 +470,7 @@ find_proc_info(unw_addr_space_t as, unw_word_t ip, unw_proc_info_t *pi,
 		symfile = dso->symsrc_filename ?: dso->name;
 
 		memset(&di, 0, sizeof(di));
-		if (dwarf_find_debug_frame(0, &di, ip, base, symfile,
-					   map->start, map->end))
+		if (dwarf_find_debug_frame(0, &di, ip, base, symfile, start, map__end(map)))
 			return dwarf_search_unwind_table(as, ip, &di, pi,
 							 need_unwind_info, arg);
 	}