From ff583dc43dc8b62c9ec639604adae641ba38a91d Mon Sep 17 00:00:00 2001 From: Ian Rogers Date: Mon, 20 Mar 2023 14:22:33 -0700 Subject: perf maps: Remove rb_node from struct map struct map is reference counted, having it also be a node in an red-black tree complicates the reference counting. Switch to having a map_rb_node which is a red-block tree node but points at the reference counted struct map. This reference is responsible for a single reference count. Committer notes: Fixed up tools/perf/util/unwind-libunwind-local.c to use map_rb_node as well. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Alexey Bayduraev Cc: Andi Kleen Cc: Andrew Morton Cc: Andy Shevchenko Cc: Darren Hart Cc: Davidlohr Bueso Cc: Dmitriy Vyukov Cc: Eric Dumazet Cc: German Gomez Cc: Hao Luo Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: John Garry Cc: Kajol Jain Cc: Kan Liang Cc: Leo Yan Cc: Madhavan Srinivasan Cc: Mark Rutland Cc: Masami Hiramatsu Cc: Miaoqian Lin Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Riccardo Mancini Cc: Shunsuke Nakamura Cc: Song Liu Cc: Stephane Eranian Cc: Stephen Brennan Cc: Steven Rostedt (VMware) Cc: Thomas Gleixner Cc: Thomas Richter Cc: Yury Norov Link: https://lore.kernel.org/r/20230320212248.1175731-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/tests/vmlinux-kallsyms.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) (limited to 'tools/perf/tests/vmlinux-kallsyms.c') diff --git a/tools/perf/tests/vmlinux-kallsyms.c b/tools/perf/tests/vmlinux-kallsyms.c index 8ab035b55875..c8abb3ca8347 100644 --- a/tools/perf/tests/vmlinux-kallsyms.c +++ b/tools/perf/tests/vmlinux-kallsyms.c @@ -118,7 +118,8 @@ static int test__vmlinux_matches_kallsyms(struct test_suite *test __maybe_unused int err = TEST_FAIL; struct rb_node *nd; struct symbol *sym; - struct map *kallsyms_map, *vmlinux_map, *map; + struct map *kallsyms_map, *vmlinux_map; + struct map_rb_node *rb_node; struct machine kallsyms, vmlinux; struct maps *maps; u64 mem_start, mem_end; @@ -290,15 +291,15 @@ next_pair: header_printed = false; - maps__for_each_entry(maps, map) { - struct map * + maps__for_each_entry(maps, rb_node) { + struct map *map = rb_node->map; /* * If it is the kernel, kallsyms is always "[kernel.kallsyms]", while * the kernel will have the path for the vmlinux file being used, * so use the short name, less descriptive but the same ("[kernel]" in * both cases. */ - pair = maps__find_by_name(kallsyms.kmaps, (map->dso->kernel ? + struct map *pair = maps__find_by_name(kallsyms.kmaps, (map->dso->kernel ? map->dso->short_name : map->dso->name)); if (pair) { @@ -314,8 +315,8 @@ next_pair: header_printed = false; - maps__for_each_entry(maps, map) { - struct map *pair; + maps__for_each_entry(maps, rb_node) { + struct map *pair, *map = rb_node->map; mem_start = vmlinux_map->unmap_ip(vmlinux_map, map->start); mem_end = vmlinux_map->unmap_ip(vmlinux_map, map->end); @@ -344,7 +345,9 @@ next_pair: maps = machine__kernel_maps(&kallsyms); - maps__for_each_entry(maps, map) { + maps__for_each_entry(maps, rb_node) { + struct map *map = rb_node->map; + if (!map->priv) { if (!header_printed) { pr_info("WARN: Maps only in kallsyms:\n"); -- cgit