diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2022-07-11 12:32:09 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2022-07-20 11:08:37 -0300 |
| commit | f42bbbf2e9a50cacc6981f7f8514b33d56d054ba (patch) | |
| tree | 34e61f6f6b93823739ffbbc48c6a8938c7c0c0e3 | |
| parent | eef8e06eeba83f919f3e06bbaed548038ba3b2fa (diff) | |
| download | linux-f42bbbf2e9a50cacc6981f7f8514b33d56d054ba.tar.bz2 | |
perf tools: Handle injected guest kernel mmap event
If a kernel mmap event was recorded inside a guest and injected into a host
perf.data file, then it will match a host mmap_name not a guest mmap_name,
see machine__set_mmap_name(). So try matching a host mmap_name in that
case.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: kvm@vger.kernel.org
Link: https://lore.kernel.org/r/20220711093218.10967-27-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/util/machine.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c index 44da170c2fa6..facc13fbf16e 100644 --- a/tools/perf/util/machine.c +++ b/tools/perf/util/machine.c @@ -1742,6 +1742,7 @@ static int machine__process_kernel_mmap_event(struct machine *machine, struct map *map; enum dso_space_type dso_space; bool is_kernel_mmap; + const char *mmap_name = machine->mmap_name; /* If we have maps from kcore then we do not need or want any others */ if (machine__uses_kcore(machine)) @@ -1752,8 +1753,16 @@ static int machine__process_kernel_mmap_event(struct machine *machine, else dso_space = DSO_SPACE__KERNEL_GUEST; - is_kernel_mmap = memcmp(xm->name, machine->mmap_name, - strlen(machine->mmap_name) - 1) == 0; + is_kernel_mmap = memcmp(xm->name, mmap_name, strlen(mmap_name) - 1) == 0; + if (!is_kernel_mmap && !machine__is_host(machine)) { + /* + * If the event was recorded inside the guest and injected into + * the host perf.data file, then it will match a host mmap_name, + * so try that - see machine__set_mmap_name(). + */ + mmap_name = "[kernel.kallsyms]"; + is_kernel_mmap = memcmp(xm->name, mmap_name, strlen(mmap_name) - 1) == 0; + } if (xm->name[0] == '/' || (!is_kernel_mmap && xm->name[0] == '[')) { map = machine__addnew_module_map(machine, xm->start, @@ -1767,7 +1776,7 @@ static int machine__process_kernel_mmap_event(struct machine *machine, dso__set_build_id(map->dso, bid); } else if (is_kernel_mmap) { - const char *symbol_name = (xm->name + strlen(machine->mmap_name)); + const char *symbol_name = xm->name + strlen(mmap_name); /* * Should be there already, from the build-id table in * the header. |