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Add support as a distinct python event type. Assisted-by: Gemini:gemini-3.1-pro-preview Signed-off-by: Ian Rogers --- v12: - Used `copy_size` to bound `max_len` for NUL termination of mmap2 and comm events to fix an out-of-bounds write. --- tools/perf/util/python.c | 158 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 157 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c index 7011a773e450..a00c27e3e677 100644 --- a/tools/perf/util/python.c +++ b/tools/perf/util/python.c @@ -133,7 +133,7 @@ static const char pyrf_mmap_event__doc[] = PyDoc_STR("perf mmap event object."); static PyMemberDef pyrf_mmap_event__members[] = { sample_members member_def(perf_event_header, type, T_UINT, "event type"), - member_def(perf_event_header, misc, T_UINT, "event misc"), + member_def(perf_event_header, misc, T_USHORT, "event misc"), member_def(perf_record_mmap, pid, T_UINT, "event pid"), member_def(perf_record_mmap, tid, T_UINT, "event tid"), member_def(perf_record_mmap, start, T_ULONGLONG, "start of the map"), @@ -174,6 +174,149 @@ static PyTypeObject pyrf_mmap_event__type = { .tp_repr = (reprfunc)pyrf_mmap_event__repr, }; +static const char pyrf_mmap2_event__doc[] = PyDoc_STR("perf mmap2 event object."); + +static PyObject *pyrf_mmap2_event__get_maj(PyObject *self, void *closure __maybe_unused) +{ + struct pyrf_event *pevent = (void *)self; + + if (pevent->event.header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID) + Py_RETURN_NONE; + + return PyLong_FromUnsignedLong(pevent->event.mmap2.maj); +} + +static PyObject *pyrf_mmap2_event__get_min(PyObject *self, void *closure __maybe_unused) +{ + struct pyrf_event *pevent = (void *)self; + + if (pevent->event.header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID) + Py_RETURN_NONE; + + return PyLong_FromUnsignedLong(pevent->event.mmap2.min); +} + +static PyObject *pyrf_mmap2_event__get_ino(PyObject *self, void *closure __maybe_unused) +{ + struct pyrf_event *pevent = (void *)self; + + if (pevent->event.header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID) + Py_RETURN_NONE; + + return PyLong_FromUnsignedLongLong(pevent->event.mmap2.ino); +} + +static PyObject *pyrf_mmap2_event__get_ino_generation(PyObject *self, void *closure __maybe_unused) +{ + struct pyrf_event *pevent = (void *)self; + + if (pevent->event.header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID) + Py_RETURN_NONE; + + return PyLong_FromUnsignedLongLong(pevent->event.mmap2.ino_generation); +} + +static PyObject *pyrf_mmap2_event__get_build_id(PyObject *self, void *closure __maybe_unused) +{ + struct pyrf_event *pevent = (void *)self; + + if (!(pevent->event.header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID)) + Py_RETURN_NONE; + + int size = pevent->event.mmap2.build_id_size; + + if (size > 20) + size = 20; + + return PyBytes_FromStringAndSize((const char *)pevent->event.mmap2.build_id, size); +} + +static PyGetSetDef pyrf_mmap2_event__getset[] = { + { + .name = "evsel", + .get = pyrf_event__get_evsel, + .set = NULL, + .doc = "tracking event.", + }, + { + .name = "maj", + .get = pyrf_mmap2_event__get_maj, + .set = NULL, + .doc = "major number.", + }, + { + .name = "min", + .get = pyrf_mmap2_event__get_min, + .set = NULL, + .doc = "minor number.", + }, + { + .name = "ino", + .get = pyrf_mmap2_event__get_ino, + .set = NULL, + .doc = "inode number.", + }, + { + .name = "ino_generation", + .get = pyrf_mmap2_event__get_ino_generation, + .set = NULL, + .doc = "inode generation.", + }, + { + .name = "build_id", + .get = pyrf_mmap2_event__get_build_id, + .set = NULL, + .doc = "binary build ID.", + }, + { .name = NULL, }, +}; + +static PyMemberDef pyrf_mmap2_event__members[] = { + sample_members + member_def(perf_event_header, type, T_UINT, "event type"), + member_def(perf_event_header, misc, T_USHORT, "event misc"), + member_def(perf_record_mmap2, pid, T_UINT, "event pid"), + member_def(perf_record_mmap2, tid, T_UINT, "event tid"), + member_def(perf_record_mmap2, start, T_ULONGLONG, "start of the map"), + member_def(perf_record_mmap2, len, T_ULONGLONG, "map length"), + member_def(perf_record_mmap2, pgoff, T_ULONGLONG, "page offset"), + member_def(perf_record_mmap2, prot, T_UINT, "protection"), + member_def(perf_record_mmap2, flags, T_UINT, "flags"), + member_def(perf_record_mmap2, filename, T_STRING_INPLACE, "backing store"), + { .name = NULL, }, +}; + +static PyObject *pyrf_mmap2_event__repr(const struct pyrf_event *pevent) +{ + PyObject *ret; + char *s; + + if (asprintf(&s, "{ type: mmap2, pid: %u, tid: %u, start: %#" PRI_lx64 ", " + "length: %#" PRI_lx64 ", offset: %#" PRI_lx64 ", " + "flags: %#x, prot: %#x, filename: %s }", + pevent->event.mmap2.pid, pevent->event.mmap2.tid, + pevent->event.mmap2.start, pevent->event.mmap2.len, + pevent->event.mmap2.pgoff, pevent->event.mmap2.flags, + pevent->event.mmap2.prot, pevent->event.mmap2.filename) < 0) + return PyErr_NoMemory(); + + ret = PyUnicode_FromString(s); + free(s); + return ret; +} + +static PyTypeObject pyrf_mmap2_event__type = { + PyVarObject_HEAD_INIT(NULL, 0) + .tp_name = "perf.mmap2_event", + .tp_basicsize = sizeof(struct pyrf_event), + .tp_dealloc = (destructor)pyrf_event__delete, + .tp_flags = Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, + .tp_doc = pyrf_mmap2_event__doc, + .tp_members = pyrf_mmap2_event__members, + .tp_getset = pyrf_mmap2_event__getset, + .tp_repr = (reprfunc)pyrf_mmap2_event__repr, +}; + static const char pyrf_task_event__doc[] = PyDoc_STR("perf task (fork/exit) event object."); static PyMemberDef pyrf_task_event__members[] = { @@ -799,6 +942,9 @@ static int pyrf_event__setup_types(void) int err; err = PyType_Ready(&pyrf_mmap_event__type); + if (err < 0) + goto out; + err = PyType_Ready(&pyrf_mmap2_event__type); if (err < 0) goto out; err = PyType_Ready(&pyrf_lost_event__type); @@ -828,6 +974,7 @@ static int pyrf_event__setup_types(void) static PyTypeObject *pyrf_event__type[] = { [PERF_RECORD_MMAP] = &pyrf_mmap_event__type, + [PERF_RECORD_MMAP2] = &pyrf_mmap2_event__type, [PERF_RECORD_LOST] = &pyrf_lost_event__type, [PERF_RECORD_COMM] = &pyrf_comm_event__type, [PERF_RECORD_EXIT] = &pyrf_task_event__type, @@ -876,6 +1023,12 @@ static PyObject *pyrf_event__new(const union perf_event *event, struct evsel *ev offsetof(struct perf_record_mmap, filename); pevent->event.mmap.filename[max_len - 1] = '\0'; + } else if (event->header.type == PERF_RECORD_MMAP2) { + /* Ensure '\0' string termination. */ + size_t max_len = copy_size - + offsetof(struct perf_record_mmap2, filename); + + pevent->event.mmap2.filename[max_len - 1] = '\0'; } else if (event->header.type == PERF_RECORD_COMM) { /* Ensure '\0' string termination. */ size_t max_len = copy_size - @@ -3317,6 +3470,9 @@ PyMODINIT_FUNC PyInit_perf(void) Py_INCREF(&pyrf_mmap_event__type); PyModule_AddObject(module, "mmap_event", (PyObject *)&pyrf_mmap_event__type); + Py_INCREF(&pyrf_mmap2_event__type); + PyModule_AddObject(module, "mmap2_event", (PyObject *)&pyrf_mmap2_event__type); + Py_INCREF(&pyrf_lost_event__type); PyModule_AddObject(module, "lost_event", (PyObject *)&pyrf_lost_event__type); -- 2.54.0.1136.gdb2ca164c4-goog