perf tools: Use struct extra_kernel_map in machine__process_kernel_mmap_event

Using struct extra_kernel_map in machine__process_kernel_mmap_event, to
pass mmap details. This way we can used single function for all 3 mmap
versions.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20201126170026.2619053-12-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 15385ea..1ae32a8 100644 (file)
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -1581,32 +1581,25 @@ static bool machine__uses_kcore(struct machine *machine)
 }
 
 static bool perf_event__is_extra_kernel_mmap(struct machine *machine,
-                                            union perf_event *event)
+                                            struct extra_kernel_map *xm)
 {
        return machine__is(machine, "x86_64") &&
-              is_entry_trampoline(event->mmap.filename);
+              is_entry_trampoline(xm->name);
 }
 
 static int machine__process_extra_kernel_map(struct machine *machine,
-                                            union perf_event *event)
+                                            struct extra_kernel_map *xm)
 {
        struct dso *kernel = machine__kernel_dso(machine);
-       struct extra_kernel_map xm = {
-               .start = event->mmap.start,
-               .end   = event->mmap.start + event->mmap.len,
-               .pgoff = event->mmap.pgoff,
-       };
 
        if (kernel == NULL)
                return -1;
 
-       strlcpy(xm.name, event->mmap.filename, KMAP_NAME_LEN);
-
-       return machine__create_extra_kernel_map(machine, kernel, &xm);
+       return machine__create_extra_kernel_map(machine, kernel, xm);
 }
 
 static int machine__process_kernel_mmap_event(struct machine *machine,
-                                             union perf_event *event)
+                                             struct extra_kernel_map *xm)
 {
        struct map *map;
        enum dso_space_type dso_space;
@@ -1621,20 +1614,18 @@ static int machine__process_kernel_mmap_event(struct machine *machine,
        else
                dso_space = DSO_SPACE__KERNEL_GUEST;
 
-       is_kernel_mmap = memcmp(event->mmap.filename,
-                               machine->mmap_name,
+       is_kernel_mmap = memcmp(xm->name, machine->mmap_name,
                                strlen(machine->mmap_name) - 1) == 0;
-       if (event->mmap.filename[0] == '/' ||
-           (!is_kernel_mmap && event->mmap.filename[0] == '[')) {
-               map = machine__addnew_module_map(machine, event->mmap.start,
-                                                event->mmap.filename);
+       if (xm->name[0] == '/' ||
+           (!is_kernel_mmap && xm->name[0] == '[')) {
+               map = machine__addnew_module_map(machine, xm->start,
+                                                xm->name);
                if (map == NULL)
                        goto out_problem;
 
-               map->end = map->start + event->mmap.len;
+               map->end = map->start + xm->end - xm->start;
        } else if (is_kernel_mmap) {
-               const char *symbol_name = (event->mmap.filename +
-                               strlen(machine->mmap_name));
+               const char *symbol_name = (xm->name + strlen(machine->mmap_name));
                /*
                 * Should be there already, from the build-id table in
                 * the header.
@@ -1688,18 +1679,17 @@ 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, event->mmap.start,
-                                        event->mmap.start + event->mmap.len);
+               machine__update_kernel_mmap(machine, xm->start, xm->end);
 
                /*
                 * Avoid using a zero address (kptr_restrict) for the ref reloc
                 * symbol. Effectively having zero here means that at record
                 * time /proc/sys/kernel/kptr_restrict was non zero.
                 */
-               if (event->mmap.pgoff != 0) {
+               if (xm->pgoff != 0) {
                        map__set_kallsyms_ref_reloc_sym(machine->vmlinux_map,
                                                        symbol_name,
-                                                       event->mmap.pgoff);
+                                                       xm->pgoff);
                }
 
                if (machine__is_default_guest(machine)) {
@@ -1708,8 +1698,8 @@ static int machine__process_kernel_mmap_event(struct machine *machine,
                         */
                        dso__load(kernel, machine__kernel_map(machine));
                }
-       } else if (perf_event__is_extra_kernel_mmap(machine, event)) {
-               return machine__process_extra_kernel_map(machine, event);
+       } else if (perf_event__is_extra_kernel_mmap(machine, xm)) {
+               return machine__process_extra_kernel_map(machine, xm);
        }
        return 0;
 out_problem:
@@ -1735,7 +1725,14 @@ int machine__process_mmap2_event(struct machine *machine,
 
        if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
            sample->cpumode == PERF_RECORD_MISC_KERNEL) {
-               ret = machine__process_kernel_mmap_event(machine, event);
+               struct extra_kernel_map xm = {
+                       .start = event->mmap2.start,
+                       .end   = event->mmap2.start + event->mmap2.len,
+                       .pgoff = event->mmap2.pgoff,
+               };
+
+               strlcpy(xm.name, event->mmap2.filename, KMAP_NAME_LEN);
+               ret = machine__process_kernel_mmap_event(machine, &xm);
                if (ret < 0)
                        goto out_problem;
                return 0;
@@ -1785,7 +1782,14 @@ int machine__process_mmap_event(struct machine *machine, union perf_event *event
 
        if (sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL ||
            sample->cpumode == PERF_RECORD_MISC_KERNEL) {
-               ret = machine__process_kernel_mmap_event(machine, event);
+               struct extra_kernel_map xm = {
+                       .start = event->mmap.start,
+                       .end   = event->mmap.start + event->mmap.len,
+                       .pgoff = event->mmap.pgoff,
+               };
+
+               strlcpy(xm.name, event->mmap.filename, KMAP_NAME_LEN);
+               ret = machine__process_kernel_mmap_event(machine, &xm);
                if (ret < 0)
                        goto out_problem;
                return 0;