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perf events x86: Use function to add missing lock

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Switch from loop macro maps__for_each_entry to maps__for_each_map
function that takes a callback. The function holds the maps lock,
which should be held during iteration.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: Colin Ian King <colin.i.king@gmail.com>
Cc: Dmitrii Dolgov <9erthalion6@gmail.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Guilherme Amadio <amadio@gentoo.org>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Li Dong <lidong@vivo.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Ming Wang <wangming01@loongson.cn>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Steinar H. Gunderson <sesse@google.com>
Cc: Vincent Whitchurch <vincent.whitchurch@axis.com>
Cc: Wenyu Liu <liuwenyu7@huawei.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Link: https://lore.kernel.org/r/20231207011722.1220634-4-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers 2023-12-06 17:16:37 -08:00 committed by Arnaldo Carvalho de Melo
parent 19b5bd9a59
commit bc4bc56d9d
1 changed files with 61 additions and 48 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

109
tools/perf/arch/x86/util/event.c
View File

@ -14,66 +14,79 @@
#if defined(__x86_64__)
struct perf_event__synthesize_extra_kmaps_cb_args {
struct perf_tool *tool;
perf_event__handler_t process;
struct machine *machine;
union perf_event *event;
};
static int perf_event__synthesize_extra_kmaps_cb(struct map *map, void *data)
{
struct perf_event__synthesize_extra_kmaps_cb_args *args = data;
union perf_event *event = args->event;
struct kmap *kmap;
size_t size;
if (!__map__is_extra_kernel_map(map))
return 0;
kmap = map__kmap(map);
size = sizeof(event->mmap) - sizeof(event->mmap.filename) +
PERF_ALIGN(strlen(kmap->name) + 1, sizeof(u64)) +
args->machine->id_hdr_size;
memset(event, 0, size);
event->mmap.header.type = PERF_RECORD_MMAP;
/*
* kernel uses 0 for user space maps, see kernel/perf_event.c
* __perf_event_mmap
*/
if (machine__is_host(args->machine))
event->header.misc = PERF_RECORD_MISC_KERNEL;
else
event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
event->mmap.header.size = size;
event->mmap.start = map__start(map);
event->mmap.len = map__size(map);
event->mmap.pgoff = map__pgoff(map);
event->mmap.pid = args->machine->pid;
strlcpy(event->mmap.filename, kmap->name, PATH_MAX);
if (perf_tool__process_synth_event(args->tool, event, args->machine, args->process) != 0)
return -1;
return 0;
}
int perf_event__synthesize_extra_kmaps(struct perf_tool *tool,
perf_event__handler_t process,
struct machine *machine)
{
int rc = 0;
struct map_rb_node *pos;
int rc;
struct maps *kmaps = machine__kernel_maps(machine);
union perf_event *event = zalloc(sizeof(event->mmap) +
machine->id_hdr_size);
struct perf_event__synthesize_extra_kmaps_cb_args args = {
.tool = tool,
.process = process,
.machine = machine,
.event = zalloc(sizeof(args.event->mmap) + machine->id_hdr_size),
};
if (!event) {
if (!args.event) {
pr_debug("Not enough memory synthesizing mmap event "
"for extra kernel maps\n");
return -1;
}
maps__for_each_entry(kmaps, pos) {
struct kmap *kmap;
size_t size;
struct map *map = pos->map;
rc = maps__for_each_map(kmaps, perf_event__synthesize_extra_kmaps_cb, &args);
if (!__map__is_extra_kernel_map(map))
continue;
kmap = map__kmap(map);
size = sizeof(event->mmap) - sizeof(event->mmap.filename) +
PERF_ALIGN(strlen(kmap->name) + 1, sizeof(u64)) +
machine->id_hdr_size;
memset(event, 0, size);
event->mmap.header.type = PERF_RECORD_MMAP;
/*
* kernel uses 0 for user space maps, see kernel/perf_event.c
* __perf_event_mmap
*/
if (machine__is_host(machine))
event->header.misc = PERF_RECORD_MISC_KERNEL;
else
event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL;
event->mmap.header.size = size;
event->mmap.start = map__start(map);
event->mmap.len = map__size(map);
event->mmap.pgoff = map__pgoff(map);
event->mmap.pid = machine->pid;
strlcpy(event->mmap.filename, kmap->name, PATH_MAX);
if (perf_tool__process_synth_event(tool, event, machine,
process) != 0) {
rc = -1;
break;
}
}
free(event);
free(args.event);
return rc;
}