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perf maps: Remove rb_node from struct map

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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 <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>
This commit is contained in:
Ian Rogers
2023-03-20 14:22:33 -07:00
committed by Arnaldo Carvalho de Melo
parent 8372020996
commit ff583dc43d
17 changed files with 295 additions and 186 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
tools/perf/tests/vmlinux-kallsyms.c
View File

@@ -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");