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 <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>
diff --git a/tools/perf/arch/x86/util/event.c b/tools/perf/arch/x86/util/event.c
index e4288d0..17bf60b 100644
--- a/tools/perf/arch/x86/util/event.c
+++ b/tools/perf/arch/x86/util/event.c
@@ -19,7 +19,7 @@ int perf_event__synthesize_extra_kmaps(struct perf_tool *tool,
struct machine *machine)
{
int rc = 0;
- struct map *pos;
+ struct map_rb_node *pos;
struct maps *kmaps = machine__kernel_maps(machine);
union perf_event *event = zalloc(sizeof(event->mmap) +
machine->id_hdr_size);
@@ -33,11 +33,12 @@ int perf_event__synthesize_extra_kmaps(struct perf_tool *tool,
maps__for_each_entry(kmaps, pos) {
struct kmap *kmap;
size_t size;
+ struct map *map = pos->map;
- if (!__map__is_extra_kernel_map(pos))
+ if (!__map__is_extra_kernel_map(map))
continue;
- kmap = map__kmap(pos);
+ kmap = map__kmap(map);
size = sizeof(event->mmap) - sizeof(event->mmap.filename) +
PERF_ALIGN(strlen(kmap->name) + 1, sizeof(u64)) +
@@ -58,9 +59,9 @@ int perf_event__synthesize_extra_kmaps(struct perf_tool *tool,
event->mmap.header.size = size;
- event->mmap.start = pos->start;
- event->mmap.len = pos->end - pos->start;
- event->mmap.pgoff = pos->pgoff;
+ event->mmap.start = map->start;
+ event->mmap.len = map->end - map->start;
+ event->mmap.pgoff = map->pgoff;
event->mmap.pid = machine->pid;
strlcpy(event->mmap.filename, kmap->name, PATH_MAX);
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 4011abc..c7e3863 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -844,9 +844,11 @@ static struct task *tasks_list(struct task *task, struct machine *machine)
static size_t maps__fprintf_task(struct maps *maps, int indent, FILE *fp)
{
size_t printed = 0;
- struct map *map;
+ struct map_rb_node *rb_node;
- maps__for_each_entry(maps, map) {
+ maps__for_each_entry(maps, rb_node) {
+ struct map *map = rb_node->map;
+
printed += fprintf(fp, "%*s %" PRIx64 "-%" PRIx64 " %c%c%c%c %08" PRIx64 " %" PRIu64 " %s\n",
indent, "", map->start, map->end,
map->prot & PROT_READ ? 'r' : '-',
diff --git a/tools/perf/tests/maps.c b/tools/perf/tests/maps.c
index a69988a..8246d37 100644
--- a/tools/perf/tests/maps.c
+++ b/tools/perf/tests/maps.c
@@ -15,10 +15,12 @@ struct map_def {
static int check_maps(struct map_def *merged, unsigned int size, struct maps *maps)
{
- struct map *map;
+ struct map_rb_node *rb_node;
unsigned int i = 0;
- maps__for_each_entry(maps, map) {
+ maps__for_each_entry(maps, rb_node) {
+ struct map *map = rb_node->map;
+
if (i > 0)
TEST_ASSERT_VAL("less maps expected", (map && i < size) || (!map && i == size));
@@ -74,7 +76,7 @@ static int test__maps__merge_in(struct test_suite *t __maybe_unused, int subtest
map->start = bpf_progs[i].start;
map->end = bpf_progs[i].end;
- maps__insert(maps, map);
+ TEST_ASSERT_VAL("failed to insert map", maps__insert(maps, map) == 0);
map__put(map);
}
diff --git a/tools/perf/tests/vmlinux-kallsyms.c b/tools/perf/tests/vmlinux-kallsyms.c
index 8ab035b..c8abb3c 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 @@ static int test__vmlinux_matches_kallsyms(struct test_suite *test __maybe_unused
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 @@ static int test__vmlinux_matches_kallsyms(struct test_suite *test __maybe_unused
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 @@ static int test__vmlinux_matches_kallsyms(struct test_suite *test __maybe_unused
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");
diff --git a/tools/perf/util/bpf_lock_contention.c b/tools/perf/util/bpf_lock_contention.c
index b3e8aa9..8a5d0eb 100644
--- a/tools/perf/util/bpf_lock_contention.c
+++ b/tools/perf/util/bpf_lock_contention.c
@@ -284,7 +284,7 @@ int lock_contention_read(struct lock_contention *con)
}
/* make sure it loads the kernel map */
- map__load(maps__first(machine->kmaps));
+ map__load(maps__first(machine->kmaps)->map);
prev_key = NULL;
while (!bpf_map_get_next_key(fd, prev_key, &key)) {
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 3182815..2058623 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -883,6 +883,7 @@ static int machine__process_ksymbol_register(struct machine *machine,
if (!map) {
struct dso *dso = dso__new(event->ksymbol.name);
+ int err;
if (dso) {
dso->kernel = DSO_SPACE__KERNEL;
@@ -902,8 +903,11 @@ static int machine__process_ksymbol_register(struct machine *machine,
map->start = event->ksymbol.addr;
map->end = map->start + event->ksymbol.len;
- maps__insert(machine__kernel_maps(machine), map);
+ err = maps__insert(machine__kernel_maps(machine), map);
map__put(map);
+ if (err)
+ return err;
+
dso__set_loaded(dso);
if (is_bpf_image(event->ksymbol.name)) {
@@ -1003,6 +1007,7 @@ static struct map *machine__addnew_module_map(struct machine *machine, u64 start
struct map *map = NULL;
struct kmod_path m;
struct dso *dso;
+ int err;
if (kmod_path__parse_name(&m, filename))
return NULL;
@@ -1015,10 +1020,14 @@ static struct map *machine__addnew_module_map(struct machine *machine, u64 start
if (map == NULL)
goto out;
- maps__insert(machine__kernel_maps(machine), map);
+ err = maps__insert(machine__kernel_maps(machine), map);
/* Put the map here because maps__insert already got it */
map__put(map);
+
+ /* If maps__insert failed, return NULL. */
+ if (err)
+ map = NULL;
out:
/* put the dso here, corresponding to machine__findnew_module_dso */
dso__put(dso);
@@ -1185,10 +1194,11 @@ int machine__create_extra_kernel_map(struct machine *machine,
{
struct kmap *kmap;
struct map *map;
+ int err;
map = map__new2(xm->start, kernel);
if (!map)
- return -1;
+ return -ENOMEM;
map->end = xm->end;
map->pgoff = xm->pgoff;
@@ -1197,14 +1207,16 @@ int machine__create_extra_kernel_map(struct machine *machine,
strlcpy(kmap->name, xm->name, KMAP_NAME_LEN);
- maps__insert(machine__kernel_maps(machine), map);
+ err = maps__insert(machine__kernel_maps(machine), map);
- pr_debug2("Added extra kernel map %s %" PRIx64 "-%" PRIx64 "\n",
- kmap->name, map->start, map->end);
+ if (!err) {
+ pr_debug2("Added extra kernel map %s %" PRIx64 "-%" PRIx64 "\n",
+ kmap->name, map->start, map->end);
+ }
map__put(map);
- return 0;
+ return err;
}
static u64 find_entry_trampoline(struct dso *dso)
@@ -1245,16 +1257,16 @@ int machine__map_x86_64_entry_trampolines(struct machine *machine,
struct maps *kmaps = machine__kernel_maps(machine);
int nr_cpus_avail, cpu;
bool found = false;
- struct map *map;
+ struct map_rb_node *rb_node;
u64 pgoff;
/*
* In the vmlinux case, pgoff is a virtual address which must now be
* mapped to a vmlinux offset.
*/
- maps__for_each_entry(kmaps, map) {
+ maps__for_each_entry(kmaps, rb_node) {
+ struct map *dest_map, *map = rb_node->map;
struct kmap *kmap = __map__kmap(map);
- struct map *dest_map;
if (!kmap || !is_entry_trampoline(kmap->name))
continue;
@@ -1309,11 +1321,10 @@ __machine__create_kernel_maps(struct machine *machine, struct dso *kernel)
machine->vmlinux_map = map__new2(0, kernel);
if (machine->vmlinux_map == NULL)
- return -1;
+ return -ENOMEM;
machine->vmlinux_map->map_ip = machine->vmlinux_map->unmap_ip = identity__map_ip;
- maps__insert(machine__kernel_maps(machine), machine->vmlinux_map);
- return 0;
+ return maps__insert(machine__kernel_maps(machine), machine->vmlinux_map);
}
void machine__destroy_kernel_maps(struct machine *machine)
@@ -1635,25 +1646,26 @@ static void machine__set_kernel_mmap(struct machine *machine,
machine->vmlinux_map->end = ~0ULL;
}
-static void machine__update_kernel_mmap(struct machine *machine,
+static int machine__update_kernel_mmap(struct machine *machine,
u64 start, u64 end)
{
struct map *map = machine__kernel_map(machine);
+ int err;
map__get(map);
maps__remove(machine__kernel_maps(machine), map);
machine__set_kernel_mmap(machine, start, end);
- maps__insert(machine__kernel_maps(machine), map);
+ err = maps__insert(machine__kernel_maps(machine), map);
map__put(map);
+ return err;
}
int machine__create_kernel_maps(struct machine *machine)
{
struct dso *kernel = machine__get_kernel(machine);
const char *name = NULL;
- struct map *map;
u64 start = 0, end = ~0ULL;
int ret;
@@ -1685,7 +1697,9 @@ int machine__create_kernel_maps(struct machine *machine)
* we have a real start address now, so re-order the kmaps
* assume it's the last in the kmaps
*/
- machine__update_kernel_mmap(machine, start, end);
+ ret = machine__update_kernel_mmap(machine, start, end);
+ if (ret < 0)
+ goto out_put;
}
if (machine__create_extra_kernel_maps(machine, kernel))
@@ -1693,9 +1707,12 @@ int machine__create_kernel_maps(struct machine *machine)
if (end == ~0ULL) {
/* update end address of the kernel map using adjacent module address */
- map = map__next(machine__kernel_map(machine));
- if (map)
- machine__set_kernel_mmap(machine, start, map->start);
+ struct map_rb_node *rb_node = maps__find_node(machine__kernel_maps(machine),
+ machine__kernel_map(machine));
+ struct map_rb_node *next = map_rb_node__next(rb_node);
+
+ if (next)
+ machine__set_kernel_mmap(machine, start, next->map->start);
}
out_put:
@@ -1828,7 +1845,10 @@ static int machine__process_kernel_mmap_event(struct machine *machine,
if (strstr(kernel->long_name, "vmlinux"))
dso__set_short_name(kernel, "[kernel.vmlinux]", false);
- machine__update_kernel_mmap(machine, xm->start, xm->end);
+ if (machine__update_kernel_mmap(machine, xm->start, xm->end) < 0) {
+ dso__put(kernel);
+ goto out_problem;
+ }
if (build_id__is_defined(bid))
dso__set_build_id(kernel, bid);
@@ -3330,11 +3350,11 @@ int machine__for_each_dso(struct machine *machine, machine__dso_t fn, void *priv
int machine__for_each_kernel_map(struct machine *machine, machine__map_t fn, void *priv)
{
struct maps *maps = machine__kernel_maps(machine);
- struct map *map;
+ struct map_rb_node *pos;
int err = 0;
- for (map = maps__first(maps); map != NULL; map = map__next(map)) {
- err = fn(map, priv);
+ maps__for_each_entry(maps, pos) {
+ err = fn(pos->map, priv);
if (err != 0) {
break;
}
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index f3a3d9b..7620cfa 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -111,7 +111,6 @@ void map__init(struct map *map, u64 start, u64 end, u64 pgoff, struct dso *dso)
map->dso = dso__get(dso);
map->map_ip = map__map_ip;
map->unmap_ip = map__unmap_ip;
- RB_CLEAR_NODE(&map->rb_node);
map->erange_warned = false;
refcount_set(&map->refcnt, 1);
}
@@ -397,7 +396,6 @@ struct map *map__clone(struct map *from)
map = memdup(from, size);
if (map != NULL) {
refcount_set(&map->refcnt, 1);
- RB_CLEAR_NODE(&map->rb_node);
dso__get(map->dso);
}
@@ -537,20 +535,6 @@ bool map__contains_symbol(const struct map *map, const struct symbol *sym)
return ip >= map->start && ip < map->end;
}
-static struct map *__map__next(struct map *map)
-{
- struct rb_node *next = rb_next(&map->rb_node);
-
- if (next)
- return rb_entry(next, struct map, rb_node);
- return NULL;
-}
-
-struct map *map__next(struct map *map)
-{
- return map ? __map__next(map) : NULL;
-}
-
struct kmap *__map__kmap(struct map *map)
{
if (!map->dso || !map->dso->kernel)
diff --git a/tools/perf/util/map.h b/tools/perf/util/map.h
index 2879cae..d1a6f85 100644
--- a/tools/perf/util/map.h
+++ b/tools/perf/util/map.h
@@ -16,7 +16,6 @@ struct maps;
struct machine;
struct map {
- struct rb_node rb_node;
u64 start;
u64 end;
bool erange_warned:1;
diff --git a/tools/perf/util/maps.c b/tools/perf/util/maps.c
index 37bd5b4..83ec126 100644
--- a/tools/perf/util/maps.c
+++ b/tools/perf/util/maps.c
@@ -10,8 +10,6 @@
#include "ui/ui.h"
#include "unwind.h"
-static void __maps__insert(struct maps *maps, struct map *map);
-
static void maps__init(struct maps *maps, struct machine *machine)
{
maps->entries = RB_ROOT;
@@ -32,10 +30,44 @@ static void __maps__free_maps_by_name(struct maps *maps)
maps->nr_maps_allocated = 0;
}
-void maps__insert(struct maps *maps, struct map *map)
+static int __maps__insert(struct maps *maps, struct map *map)
{
+ struct rb_node **p = &maps->entries.rb_node;
+ struct rb_node *parent = NULL;
+ const u64 ip = map->start;
+ struct map_rb_node *m, *new_rb_node;
+
+ new_rb_node = malloc(sizeof(*new_rb_node));
+ if (!new_rb_node)
+ return -ENOMEM;
+
+ RB_CLEAR_NODE(&new_rb_node->rb_node);
+ new_rb_node->map = map;
+
+ while (*p != NULL) {
+ parent = *p;
+ m = rb_entry(parent, struct map_rb_node, rb_node);
+ if (ip < m->map->start)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+
+ rb_link_node(&new_rb_node->rb_node, parent, p);
+ rb_insert_color(&new_rb_node->rb_node, &maps->entries);
+ map__get(map);
+ return 0;
+}
+
+int maps__insert(struct maps *maps, struct map *map)
+{
+ int err;
+
down_write(&maps->lock);
- __maps__insert(maps, map);
+ err = __maps__insert(maps, map);
+ if (err)
+ goto out;
+
++maps->nr_maps;
if (map->dso && map->dso->kernel) {
@@ -59,32 +91,39 @@ void maps__insert(struct maps *maps, struct map *map)
if (maps_by_name == NULL) {
__maps__free_maps_by_name(maps);
- up_write(&maps->lock);
- return;
+ err = -ENOMEM;
+ goto out;
}
maps->maps_by_name = maps_by_name;
maps->nr_maps_allocated = nr_allocate;
- }
+}
maps->maps_by_name[maps->nr_maps - 1] = map;
__maps__sort_by_name(maps);
}
+ out:
up_write(&maps->lock);
+ return err;
}
-static void __maps__remove(struct maps *maps, struct map *map)
+static void __maps__remove(struct maps *maps, struct map_rb_node *rb_node)
{
- rb_erase_init(&map->rb_node, &maps->entries);
- map__put(map);
+ rb_erase_init(&rb_node->rb_node, &maps->entries);
+ map__put(rb_node->map);
+ free(rb_node);
}
void maps__remove(struct maps *maps, struct map *map)
{
+ struct map_rb_node *rb_node;
+
down_write(&maps->lock);
if (maps->last_search_by_name == map)
maps->last_search_by_name = NULL;
- __maps__remove(maps, map);
+ rb_node = maps__find_node(maps, map);
+ assert(rb_node->map == map);
+ __maps__remove(maps, rb_node);
--maps->nr_maps;
if (maps->maps_by_name)
__maps__free_maps_by_name(maps);
@@ -93,11 +132,12 @@ void maps__remove(struct maps *maps, struct map *map)
static void __maps__purge(struct maps *maps)
{
- struct map *pos, *next;
+ struct map_rb_node *pos, *next;
maps__for_each_entry_safe(maps, pos, next) {
rb_erase_init(&pos->rb_node, &maps->entries);
- map__put(pos);
+ map__put(pos->map);
+ free(pos);
}
}
@@ -153,21 +193,21 @@ struct symbol *maps__find_symbol(struct maps *maps, u64 addr, struct map **mapp)
struct symbol *maps__find_symbol_by_name(struct maps *maps, const char *name, struct map **mapp)
{
struct symbol *sym;
- struct map *pos;
+ struct map_rb_node *pos;
down_read(&maps->lock);
maps__for_each_entry(maps, pos) {
- sym = map__find_symbol_by_name(pos, name);
+ sym = map__find_symbol_by_name(pos->map, name);
if (sym == NULL)
continue;
- if (!map__contains_symbol(pos, sym)) {
+ if (!map__contains_symbol(pos->map, sym)) {
sym = NULL;
continue;
}
if (mapp != NULL)
- *mapp = pos;
+ *mapp = pos->map;
goto out;
}
@@ -196,15 +236,15 @@ int maps__find_ams(struct maps *maps, struct addr_map_symbol *ams)
size_t maps__fprintf(struct maps *maps, FILE *fp)
{
size_t printed = 0;
- struct map *pos;
+ struct map_rb_node *pos;
down_read(&maps->lock);
maps__for_each_entry(maps, pos) {
printed += fprintf(fp, "Map:");
- printed += map__fprintf(pos, fp);
+ printed += map__fprintf(pos->map, fp);
if (verbose > 2) {
- printed += dso__fprintf(pos->dso, fp);
+ printed += dso__fprintf(pos->map->dso, fp);
printed += fprintf(fp, "--\n");
}
}
@@ -231,11 +271,11 @@ int maps__fixup_overlappings(struct maps *maps, struct map *map, FILE *fp)
next = root->rb_node;
first = NULL;
while (next) {
- struct map *pos = rb_entry(next, struct map, rb_node);
+ struct map_rb_node *pos = rb_entry(next, struct map_rb_node, rb_node);
- if (pos->end > map->start) {
+ if (pos->map->end > map->start) {
first = next;
- if (pos->start <= map->start)
+ if (pos->map->start <= map->start)
break;
next = next->rb_left;
} else
@@ -244,14 +284,14 @@ int maps__fixup_overlappings(struct maps *maps, struct map *map, FILE *fp)
next = first;
while (next) {
- struct map *pos = rb_entry(next, struct map, rb_node);
+ struct map_rb_node *pos = rb_entry(next, struct map_rb_node, rb_node);
next = rb_next(&pos->rb_node);
/*
* Stop if current map starts after map->end.
* Maps are ordered by start: next will not overlap for sure.
*/
- if (pos->start >= map->end)
+ if (pos->map->start >= map->end)
break;
if (verbose >= 2) {
@@ -262,7 +302,7 @@ int maps__fixup_overlappings(struct maps *maps, struct map *map, FILE *fp)
} else {
fputs("overlapping maps:\n", fp);
map__fprintf(map, fp);
- map__fprintf(pos, fp);
+ map__fprintf(pos->map, fp);
}
}
@@ -271,8 +311,8 @@ int maps__fixup_overlappings(struct maps *maps, struct map *map, FILE *fp)
* Now check if we need to create new maps for areas not
* overlapped by the new map:
*/
- if (map->start > pos->start) {
- struct map *before = map__clone(pos);
+ if (map->start > pos->map->start) {
+ struct map *before = map__clone(pos->map);
if (before == NULL) {
err = -ENOMEM;
@@ -280,14 +320,17 @@ int maps__fixup_overlappings(struct maps *maps, struct map *map, FILE *fp)
}
before->end = map->start;
- __maps__insert(maps, before);
+ err = __maps__insert(maps, before);
+ if (err)
+ goto put_map;
+
if (verbose >= 2 && !use_browser)
map__fprintf(before, fp);
map__put(before);
}
- if (map->end < pos->end) {
- struct map *after = map__clone(pos);
+ if (map->end < pos->map->end) {
+ struct map *after = map__clone(pos->map);
if (after == NULL) {
err = -ENOMEM;
@@ -295,15 +338,19 @@ int maps__fixup_overlappings(struct maps *maps, struct map *map, FILE *fp)
}
after->start = map->end;
- after->pgoff += map->end - pos->start;
- assert(pos->map_ip(pos, map->end) == after->map_ip(after, map->end));
- __maps__insert(maps, after);
+ after->pgoff += map->end - pos->map->start;
+ assert(pos->map->map_ip(pos->map, map->end) ==
+ after->map_ip(after, map->end));
+ err = __maps__insert(maps, after);
+ if (err)
+ goto put_map;
+
if (verbose >= 2 && !use_browser)
map__fprintf(after, fp);
map__put(after);
}
put_map:
- map__put(pos);
+ map__put(pos->map);
if (err)
goto out;
@@ -322,12 +369,12 @@ int maps__clone(struct thread *thread, struct maps *parent)
{
struct maps *maps = thread->maps;
int err;
- struct map *map;
+ struct map_rb_node *rb_node;
down_read(&parent->lock);
- maps__for_each_entry(parent, map) {
- struct map *new = map__clone(map);
+ maps__for_each_entry(parent, rb_node) {
+ struct map *new = map__clone(rb_node->map);
if (new == NULL) {
err = -ENOMEM;
@@ -338,7 +385,10 @@ int maps__clone(struct thread *thread, struct maps *parent)
if (err)
goto out_unlock;
- maps__insert(maps, new);
+ err = maps__insert(maps, new);
+ if (err)
+ goto out_unlock;
+
map__put(new);
}
@@ -348,40 +398,31 @@ int maps__clone(struct thread *thread, struct maps *parent)
return err;
}
-static void __maps__insert(struct maps *maps, struct map *map)
+struct map_rb_node *maps__find_node(struct maps *maps, struct map *map)
{
- struct rb_node **p = &maps->entries.rb_node;
- struct rb_node *parent = NULL;
- const u64 ip = map->start;
- struct map *m;
+ struct map_rb_node *rb_node;
- while (*p != NULL) {
- parent = *p;
- m = rb_entry(parent, struct map, rb_node);
- if (ip < m->start)
- p = &(*p)->rb_left;
- else
- p = &(*p)->rb_right;
+ maps__for_each_entry(maps, rb_node) {
+ if (rb_node->map == map)
+ return rb_node;
}
-
- rb_link_node(&map->rb_node, parent, p);
- rb_insert_color(&map->rb_node, &maps->entries);
- map__get(map);
+ return NULL;
}
struct map *maps__find(struct maps *maps, u64 ip)
{
struct rb_node *p;
- struct map *m;
+ struct map_rb_node *m;
+
down_read(&maps->lock);
p = maps->entries.rb_node;
while (p != NULL) {
- m = rb_entry(p, struct map, rb_node);
- if (ip < m->start)
+ m = rb_entry(p, struct map_rb_node, rb_node);
+ if (ip < m->map->start)
p = p->rb_left;
- else if (ip >= m->end)
+ else if (ip >= m->map->end)
p = p->rb_right;
else
goto out;
@@ -390,14 +431,29 @@ struct map *maps__find(struct maps *maps, u64 ip)
m = NULL;
out:
up_read(&maps->lock);
- return m;
+ return m ? m->map : NULL;
}
-struct map *maps__first(struct maps *maps)
+struct map_rb_node *maps__first(struct maps *maps)
{
struct rb_node *first = rb_first(&maps->entries);
if (first)
- return rb_entry(first, struct map, rb_node);
+ return rb_entry(first, struct map_rb_node, rb_node);
return NULL;
}
+
+struct map_rb_node *map_rb_node__next(struct map_rb_node *node)
+{
+ struct rb_node *next;
+
+ if (!node)
+ return NULL;
+
+ next = rb_next(&node->rb_node);
+
+ if (!next)
+ return NULL;
+
+ return rb_entry(next, struct map_rb_node, rb_node);
+}
diff --git a/tools/perf/util/maps.h b/tools/perf/util/maps.h
index 7e729ff..512746e 100644
--- a/tools/perf/util/maps.h
+++ b/tools/perf/util/maps.h
@@ -15,15 +15,22 @@ struct map;
struct maps;
struct thread;
+struct map_rb_node {
+ struct rb_node rb_node;
+ struct map *map;
+};
+
+struct map_rb_node *maps__first(struct maps *maps);
+struct map_rb_node *map_rb_node__next(struct map_rb_node *node);
+struct map_rb_node *maps__find_node(struct maps *maps, struct map *map);
struct map *maps__find(struct maps *maps, u64 addr);
-struct map *maps__first(struct maps *maps);
-struct map *map__next(struct map *map);
#define maps__for_each_entry(maps, map) \
- for (map = maps__first(maps); map; map = map__next(map))
+ for (map = maps__first(maps); map; map = map_rb_node__next(map))
#define maps__for_each_entry_safe(maps, map, next) \
- for (map = maps__first(maps), next = map__next(map); map; map = next, next = map__next(map))
+ for (map = maps__first(maps), next = map_rb_node__next(map); map; \
+ map = next, next = map_rb_node__next(map))
struct maps {
struct rb_root entries;
@@ -63,7 +70,7 @@ void maps__put(struct maps *maps);
int maps__clone(struct thread *thread, struct maps *parent);
size_t maps__fprintf(struct maps *maps, FILE *fp);
-void maps__insert(struct maps *maps, struct map *map);
+int maps__insert(struct maps *maps, struct map *map);
void maps__remove(struct maps *maps, struct map *map);
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 881d94f..cdf5d65 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -151,23 +151,27 @@ static int kernel_get_symbol_address_by_name(const char *name, u64 *addr,
static struct map *kernel_get_module_map(const char *module)
{
struct maps *maps = machine__kernel_maps(host_machine);
- struct map *pos;
+ struct map_rb_node *pos;
/* A file path -- this is an offline module */
if (module && strchr(module, '/'))
return dso__new_map(module);
if (!module) {
- pos = machine__kernel_map(host_machine);
- return map__get(pos);
+ struct map *map = machine__kernel_map(host_machine);
+
+ return map__get(map);
}
maps__for_each_entry(maps, pos) {
/* short_name is "[module]" */
- if (strncmp(pos->dso->short_name + 1, module,
- pos->dso->short_name_len - 2) == 0 &&
- module[pos->dso->short_name_len - 2] == '\0') {
- return map__get(pos);
+ const char *short_name = pos->map->dso->short_name;
+ u16 short_name_len = pos->map->dso->short_name_len;
+
+ if (strncmp(short_name + 1, module,
+ short_name_len - 2) == 0 &&
+ module[short_name_len - 2] == '\0') {
+ return map__get(pos->map);
}
}
return NULL;
diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c
index ae810d4..33e1f58 100644
--- a/tools/perf/util/symbol-elf.c
+++ b/tools/perf/util/symbol-elf.c
@@ -1361,10 +1361,14 @@ static int dso__process_kernel_symbol(struct dso *dso, struct map *map,
map->unmap_ip = map__unmap_ip;
/* Ensure maps are correctly ordered */
if (kmaps) {
+ int err;
+
map__get(map);
maps__remove(kmaps, map);
- maps__insert(kmaps, map);
+ err = maps__insert(kmaps, map);
map__put(map);
+ if (err)
+ return err;
}
}
@@ -1417,7 +1421,8 @@ static int dso__process_kernel_symbol(struct dso *dso, struct map *map,
curr_map->map_ip = curr_map->unmap_ip = identity__map_ip;
}
curr_dso->symtab_type = dso->symtab_type;
- maps__insert(kmaps, curr_map);
+ if (maps__insert(kmaps, curr_map))
+ return -1;
/*
* Add it before we drop the reference to curr_map, i.e. while
* we still are sure to have a reference to this DSO via
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 8719074..e7a8ae2 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -273,13 +273,13 @@ void symbols__fixup_end(struct rb_root_cached *symbols, bool is_kallsyms)
void maps__fixup_end(struct maps *maps)
{
- struct map *prev = NULL, *curr;
+ struct map_rb_node *prev = NULL, *curr;
down_write(&maps->lock);
maps__for_each_entry(maps, curr) {
- if (prev != NULL && !prev->end)
- prev->end = curr->start;
+ if (prev != NULL && !prev->map->end)
+ prev->map->end = curr->map->start;
prev = curr;
}
@@ -288,8 +288,8 @@ void maps__fixup_end(struct maps *maps)
* We still haven't the actual symbols, so guess the
* last map final address.
*/
- if (curr && !curr->end)
- curr->end = ~0ULL;
+ if (curr && !curr->map->end)
+ curr->map->end = ~0ULL;
up_write(&maps->lock);
}
@@ -942,7 +942,10 @@ static int maps__split_kallsyms(struct maps *kmaps, struct dso *dso, u64 delta,
}
curr_map->map_ip = curr_map->unmap_ip = identity__map_ip;
- maps__insert(kmaps, curr_map);
+ if (maps__insert(kmaps, curr_map)) {
+ dso__put(ndso);
+ return -1;
+ }
++kernel_range;
} else if (delta) {
/* Kernel was relocated at boot time */
@@ -1130,14 +1133,15 @@ int compare_proc_modules(const char *from, const char *to)
static int do_validate_kcore_modules(const char *filename, struct maps *kmaps)
{
struct rb_root modules = RB_ROOT;
- struct map *old_map;
+ struct map_rb_node *old_node;
int err;
err = read_proc_modules(filename, &modules);
if (err)
return err;
- maps__for_each_entry(kmaps, old_map) {
+ maps__for_each_entry(kmaps, old_node) {
+ struct map *old_map = old_node->map;
struct module_info *mi;
if (!__map__is_kmodule(old_map)) {
@@ -1254,10 +1258,13 @@ static int kcore_mapfn(u64 start, u64 len, u64 pgoff, void *data)
*/
int maps__merge_in(struct maps *kmaps, struct map *new_map)
{
- struct map *old_map;
+ struct map_rb_node *rb_node;
LIST_HEAD(merged);
+ int err = 0;
- maps__for_each_entry(kmaps, old_map) {
+ maps__for_each_entry(kmaps, rb_node) {
+ struct map *old_map = rb_node->map;
+
/* no overload with this one */
if (new_map->end < old_map->start ||
new_map->start >= old_map->end)
@@ -1281,13 +1288,16 @@ int maps__merge_in(struct maps *kmaps, struct map *new_map)
*/
struct map_list_node *m = map_list_node__new();
- if (!m)
- return -ENOMEM;
+ if (!m) {
+ err = -ENOMEM;
+ goto out;
+ }
m->map = map__clone(new_map);
if (!m->map) {
free(m);
- return -ENOMEM;
+ err = -ENOMEM;
+ goto out;
}
m->map->end = old_map->start;
@@ -1319,21 +1329,24 @@ int maps__merge_in(struct maps *kmaps, struct map *new_map)
}
}
+out:
while (!list_empty(&merged)) {
struct map_list_node *old_node;
old_node = list_entry(merged.next, struct map_list_node, node);
list_del_init(&old_node->node);
- maps__insert(kmaps, old_node->map);
+ if (!err)
+ err = maps__insert(kmaps, old_node->map);
map__put(old_node->map);
free(old_node);
}
if (new_map) {
- maps__insert(kmaps, new_map);
+ if (!err)
+ err = maps__insert(kmaps, new_map);
map__put(new_map);
}
- return 0;
+ return err;
}
static int dso__load_kcore(struct dso *dso, struct map *map,
@@ -1341,7 +1354,8 @@ static int dso__load_kcore(struct dso *dso, struct map *map,
{
struct maps *kmaps = map__kmaps(map);
struct kcore_mapfn_data md;
- struct map *old_map, *replacement_map = NULL, *next;
+ struct map *replacement_map = NULL;
+ struct map_rb_node *old_node, *next;
struct machine *machine;
bool is_64_bit;
int err, fd;
@@ -1388,7 +1402,9 @@ static int dso__load_kcore(struct dso *dso, struct map *map,
}
/* Remove old maps */
- maps__for_each_entry_safe(kmaps, old_map, next) {
+ maps__for_each_entry_safe(kmaps, old_node, next) {
+ struct map *old_map = old_node->map;
+
/*
* We need to preserve eBPF maps even if they are
* covered by kcore, because we need to access
@@ -1443,17 +1459,21 @@ static int dso__load_kcore(struct dso *dso, struct map *map,
/* Ensure maps are correctly ordered */
map__get(map);
maps__remove(kmaps, map);
- maps__insert(kmaps, map);
+ err = maps__insert(kmaps, map);
map__put(map);
map__put(new_map);
+ if (err)
+ goto out_err;
} else {
/*
* Merge kcore map into existing maps,
* and ensure that current maps (eBPF)
* stay intact.
*/
- if (maps__merge_in(kmaps, new_map))
+ if (maps__merge_in(kmaps, new_map)) {
+ err = -EINVAL;
goto out_err;
+ }
}
free(new_node);
}
@@ -1500,7 +1520,7 @@ static int dso__load_kcore(struct dso *dso, struct map *map,
free(list_node);
}
close(fd);
- return -EINVAL;
+ return err;
}
/*
@@ -2044,8 +2064,9 @@ void __maps__sort_by_name(struct maps *maps)
static int map__groups__sort_by_name_from_rbtree(struct maps *maps)
{
- struct map *map;
- struct map **maps_by_name = realloc(maps->maps_by_name, maps->nr_maps * sizeof(map));
+ struct map_rb_node *rb_node;
+ struct map **maps_by_name = realloc(maps->maps_by_name,
+ maps->nr_maps * sizeof(struct map *));
int i = 0;
if (maps_by_name == NULL)
@@ -2057,8 +2078,8 @@ static int map__groups__sort_by_name_from_rbtree(struct maps *maps)
maps->maps_by_name = maps_by_name;
maps->nr_maps_allocated = maps->nr_maps;
- maps__for_each_entry(maps, map)
- maps_by_name[i++] = map;
+ maps__for_each_entry(maps, rb_node)
+ maps_by_name[i++] = rb_node->map;
__maps__sort_by_name(maps);
@@ -2084,6 +2105,7 @@ static struct map *__maps__find_by_name(struct maps *maps, const char *name)
struct map *maps__find_by_name(struct maps *maps, const char *name)
{
+ struct map_rb_node *rb_node;
struct map *map;
down_read(&maps->lock);
@@ -2102,12 +2124,13 @@ struct map *maps__find_by_name(struct maps *maps, const char *name)
goto out_unlock;
/* Fallback to traversing the rbtree... */
- maps__for_each_entry(maps, map)
+ maps__for_each_entry(maps, rb_node) {
+ map = rb_node->map;
if (strcmp(map->dso->short_name, name) == 0) {
maps->last_search_by_name = map;
goto out_unlock;
}
-
+ }
map = NULL;
out_unlock:
diff --git a/tools/perf/util/synthetic-events.c b/tools/perf/util/synthetic-events.c
index 6def010..57b95c1 100644
--- a/tools/perf/util/synthetic-events.c
+++ b/tools/perf/util/synthetic-events.c
@@ -669,7 +669,7 @@ int perf_event__synthesize_modules(struct perf_tool *tool, perf_event__handler_t
struct machine *machine)
{
int rc = 0;
- struct map *pos;
+ struct map_rb_node *pos;
struct maps *maps = machine__kernel_maps(machine);
union perf_event *event;
size_t size = symbol_conf.buildid_mmap2 ?
@@ -692,37 +692,39 @@ int perf_event__synthesize_modules(struct perf_tool *tool, perf_event__handler_t
event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
maps__for_each_entry(maps, pos) {
- if (!__map__is_kmodule(pos))
+ struct map *map = pos->map;
+
+ if (!__map__is_kmodule(map))
continue;
if (symbol_conf.buildid_mmap2) {
- size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
+ size = PERF_ALIGN(map->dso->long_name_len + 1, sizeof(u64));
event->mmap2.header.type = PERF_RECORD_MMAP2;
event->mmap2.header.size = (sizeof(event->mmap2) -
(sizeof(event->mmap2.filename) - size));
memset(event->mmap2.filename + size, 0, machine->id_hdr_size);
event->mmap2.header.size += machine->id_hdr_size;
- event->mmap2.start = pos->start;
- event->mmap2.len = pos->end - pos->start;
+ event->mmap2.start = map->start;
+ event->mmap2.len = map->end - map->start;
event->mmap2.pid = machine->pid;
- memcpy(event->mmap2.filename, pos->dso->long_name,
- pos->dso->long_name_len + 1);
+ memcpy(event->mmap2.filename, map->dso->long_name,
+ map->dso->long_name_len + 1);
perf_record_mmap2__read_build_id(&event->mmap2, machine, false);
} else {
- size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64));
+ size = PERF_ALIGN(map->dso->long_name_len + 1, sizeof(u64));
event->mmap.header.type = PERF_RECORD_MMAP;
event->mmap.header.size = (sizeof(event->mmap) -
(sizeof(event->mmap.filename) - size));
memset(event->mmap.filename + size, 0, machine->id_hdr_size);
event->mmap.header.size += machine->id_hdr_size;
- event->mmap.start = pos->start;
- event->mmap.len = pos->end - pos->start;
+ event->mmap.start = map->start;
+ event->mmap.len = map->end - map->start;
event->mmap.pid = machine->pid;
- memcpy(event->mmap.filename, pos->dso->long_name,
- pos->dso->long_name_len + 1);
+ memcpy(event->mmap.filename, map->dso->long_name,
+ map->dso->long_name_len + 1);
}
if (perf_tool__process_synth_event(tool, event, machine, process) != 0) {
diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index a2490a2..24e53bd 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -352,9 +352,7 @@ int thread__insert_map(struct thread *thread, struct map *map)
return ret;
maps__fixup_overlappings(thread->maps, map, stderr);
- maps__insert(thread->maps, map);
-
- return 0;
+ return maps__insert(thread->maps, map);
}
static int __thread__prepare_access(struct thread *thread)
@@ -362,12 +360,12 @@ static int __thread__prepare_access(struct thread *thread)
bool initialized = false;
int err = 0;
struct maps *maps = thread->maps;
- struct map *map;
+ struct map_rb_node *rb_node;
down_read(&maps->lock);
- maps__for_each_entry(maps, map) {
- err = unwind__prepare_access(thread->maps, map, &initialized);
+ maps__for_each_entry(maps, rb_node) {
+ err = unwind__prepare_access(thread->maps, rb_node->map, &initialized);
if (err || initialized)
break;
}
diff --git a/tools/perf/util/unwind-libunwind-local.c b/tools/perf/util/unwind-libunwind-local.c
index 81b6bd6..dea70a4 100644
--- a/tools/perf/util/unwind-libunwind-local.c
+++ b/tools/perf/util/unwind-libunwind-local.c
@@ -306,7 +306,7 @@ static int read_unwind_spec_eh_frame(struct dso *dso, struct unwind_info *ui,
u64 *table_data, u64 *segbase,
u64 *fde_count)
{
- struct map *map;
+ struct map_rb_node *map_node;
u64 base_addr = UINT64_MAX;
int ret, fd;
@@ -325,7 +325,9 @@ static int read_unwind_spec_eh_frame(struct dso *dso, struct unwind_info *ui,
return -EINVAL;
}
- maps__for_each_entry(ui->thread->maps, map) {
+ maps__for_each_entry(ui->thread->maps, map_node) {
+ struct map *map = map_node->map;
+
if (map->dso == dso && map->start < base_addr)
base_addr = map->start;
}
diff --git a/tools/perf/util/vdso.c b/tools/perf/util/vdso.c
index 43beb16..835c39e 100644
--- a/tools/perf/util/vdso.c
+++ b/tools/perf/util/vdso.c
@@ -144,10 +144,11 @@ static enum dso_type machine__thread_dso_type(struct machine *machine,
struct thread *thread)
{
enum dso_type dso_type = DSO__TYPE_UNKNOWN;
- struct map *map;
+ struct map_rb_node *rb_node;
- maps__for_each_entry(thread->maps, map) {
- struct dso *dso = map->dso;
+ maps__for_each_entry(thread->maps, rb_node) {
+ struct dso *dso = rb_node->map->dso;
+
if (!dso || dso->long_name[0] != '/')
continue;
dso_type = dso__type(dso, machine);
