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AFNElJ884cW+2L96YE8NivGza3i3cMsA0dSpoNSDH26wn92iYWaFmwFToJ36YlbqPHucU/r5OTCd0qPu0JVm555eDSpx@vger.kernel.org X-Gm-Message-State: AOJu0YxLxAMgIwyGfzy3pn+/e1cT26uofa3/38p4WrChr5YAlB1LlgPP 0aS5/7qzBMQDqYTDiZAVZiOrMKcOgcyliHQ8j1BbgbDIbdkCfnygSYVwVQcI9xAOj+s/mpSdt/3 DBUJMj628Mw== X-Received: from dyclw17.prod.google.com ([2002:a05:693c:2111:b0:2d9:472c:9184]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7022:502:b0:127:3f2a:af21 with SMTP id a92af1059eb24-12c73f7344bmr5531212c88.15.1776643198900; Sun, 19 Apr 2026 16:59:58 -0700 (PDT) Date: Sun, 19 Apr 2026 16:58:29 -0700 In-Reply-To: <20260419235911.2186050-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260419235911.2186050-1-irogers@google.com> X-Mailer: git-send-email 2.54.0.rc1.513.gad8abe7a5a-goog Message-ID: <20260419235911.2186050-18-irogers@google.com> Subject: [PATCH v1 17/58] perf python: Refactor and add accessors to sample event From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Jiri Olsa , Adrian Hunter , James Clark , Alice Rogers , Suzuki K Poulose , Mike Leach , John Garry , Leo Yan , Yicong Yang , Jonathan Cameron , Nick Terrell , David Sterba , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , Alexandre Chartre , Dmitrii Dolgov <9erthalion6@gmail.com>, Yuzhuo Jing , Blake Jones , Changbin Du , Gautam Menghani , Wangyang Guo , Pan Deng , Zhiguo Zhou , Tianyou Li , Thomas Falcon , Athira Rajeev , Collin Funk , Dapeng Mi , Ravi Bangoria , Zecheng Li , tanze , Thomas Richter , Ankur Arora , "Tycho Andersen (AMD)" , Howard Chu , Sun Jian , Derek Foreman , Swapnil Sapkal , Anubhav Shelat , Ricky Ringler , Qinxin Xia , Aditya Bodkhe , Chun-Tse Shao , Stephen Brennan , Yang Li , Chuck Lever , Chen Ni , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org Cc: Ian Rogers Content-Type: text/plain; charset="UTF-8" Add a common field for the evsel of an event. The evsel is derived from the PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER that are potentially present in all events. Move fields, like sample_ip, to only be present in sample events. This avoids errors like getting the sample ip for an mmap event. Add new accessors for sample event raw_buf, dso, dso_long_name, dso_bid, map_start, map_end, map_pgoff, symbol, sym_start, sym_end, srccode and insn. Minor tweaks to pyrf_evlist__str and pyrf_evsel__str. Assisted-by: Gemini:gemini-3.1-pro-preview Signed-off-by: Ian Rogers --- tools/perf/util/python.c | 369 ++++++++++++++++++++++++++++++++++++--- 1 file changed, 342 insertions(+), 27 deletions(-) diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c index 84a186532353..09b566707563 100644 --- a/tools/perf/util/python.c +++ b/tools/perf/util/python.c @@ -8,22 +8,29 @@ #include #include +#include "addr_location.h" +#include "build-id.h" #include "callchain.h" #include "comm.h" #include "counts.h" #include "data.h" #include "debug.h" +#include "dso.h" #include "dwarf-regs.h" #include "event.h" #include "evlist.h" #include "evsel.h" #include "expr.h" +#include "map.h" #include "metricgroup.h" #include "mmap.h" #include "pmus.h" #include "print_binary.h" #include "record.h" +#include "sample.h" #include "session.h" +#include "srccode.h" +#include "srcline.h" #include "strbuf.h" #include "symbol.h" #include "syscalltbl.h" @@ -32,7 +39,6 @@ #include "tool.h" #include "tp_pmu.h" #include "trace-event.h" -#include "util/sample.h" #ifdef HAVE_LIBTRACEEVENT #include @@ -40,6 +46,8 @@ PyMODINIT_FUNC PyInit_perf(void); +static PyObject *pyrf_evsel__from_evsel(struct evsel *evsel); + #define member_def(type, member, ptype, help) \ { #member, ptype, \ offsetof(struct pyrf_event, event) + offsetof(struct type, member), \ @@ -52,21 +60,48 @@ PyMODINIT_FUNC PyInit_perf(void); struct pyrf_event { PyObject_HEAD + /** @sample: The parsed sample from the event. */ struct perf_sample sample; - union perf_event event; + /** @al: The address location from machine__resolve, lazily computed. */ + struct addr_location al; + /** @al_resolved: True when machine__resolve been called. */ + bool al_resolved; + /** @event: The underlying perf_event that may be in a file or ring buffer. */ + union perf_event event; }; #define sample_members \ - sample_member_def(sample_ip, ip, T_ULONGLONG, "event ip"), \ sample_member_def(sample_pid, pid, T_INT, "event pid"), \ sample_member_def(sample_tid, tid, T_INT, "event tid"), \ - sample_member_def(sample_time, time, T_ULONGLONG, "event timestamp"), \ - sample_member_def(sample_addr, addr, T_ULONGLONG, "event addr"), \ sample_member_def(sample_id, id, T_ULONGLONG, "event id"), \ sample_member_def(sample_stream_id, stream_id, T_ULONGLONG, "event stream id"), \ sample_member_def(sample_period, period, T_ULONGLONG, "event period"), \ sample_member_def(sample_cpu, cpu, T_UINT, "event cpu"), +static PyObject *pyrf_event__get_evsel(PyObject *self, void *closure __maybe_unused) +{ + struct pyrf_event *pevent = (void *)self; + + return pyrf_evsel__from_evsel(pevent->sample.evsel); +} + +static PyGetSetDef pyrf_event__getset[] = { + { + .name = "evsel", + .get = pyrf_event__get_evsel, + .set = NULL, + .doc = "tracking event.", + }, + { .name = NULL, }, +}; + +static void pyrf_event__delete(struct pyrf_event *pevent) +{ + evsel__put(pevent->sample.evsel); + perf_sample__exit(&pevent->sample); + Py_TYPE(pevent)->tp_free((PyObject *)pevent); +} + static const char pyrf_mmap_event__doc[] = PyDoc_STR("perf mmap event object."); static PyMemberDef pyrf_mmap_event__members[] = { @@ -105,9 +140,12 @@ static PyTypeObject pyrf_mmap_event__type = { PyVarObject_HEAD_INIT(NULL, 0) .tp_name = "perf.mmap_event", .tp_basicsize = sizeof(struct pyrf_event), + .tp_new = PyType_GenericNew, + .tp_dealloc = (destructor)pyrf_event__delete, .tp_flags = Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, .tp_doc = pyrf_mmap_event__doc, .tp_members = pyrf_mmap_event__members, + .tp_getset = pyrf_event__getset, .tp_repr = (reprfunc)pyrf_mmap_event__repr, }; @@ -140,9 +178,12 @@ static PyTypeObject pyrf_task_event__type = { PyVarObject_HEAD_INIT(NULL, 0) .tp_name = "perf.task_event", .tp_basicsize = sizeof(struct pyrf_event), + .tp_new = PyType_GenericNew, + .tp_dealloc = (destructor)pyrf_event__delete, .tp_flags = Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, .tp_doc = pyrf_task_event__doc, .tp_members = pyrf_task_event__members, + .tp_getset = pyrf_event__getset, .tp_repr = (reprfunc)pyrf_task_event__repr, }; @@ -172,6 +213,7 @@ static PyTypeObject pyrf_comm_event__type = { .tp_flags = Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, .tp_doc = pyrf_comm_event__doc, .tp_members = pyrf_comm_event__members, + .tp_getset = pyrf_event__getset, .tp_repr = (reprfunc)pyrf_comm_event__repr, }; @@ -201,9 +243,12 @@ static PyTypeObject pyrf_throttle_event__type = { PyVarObject_HEAD_INIT(NULL, 0) .tp_name = "perf.throttle_event", .tp_basicsize = sizeof(struct pyrf_event), + .tp_new = PyType_GenericNew, + .tp_dealloc = (destructor)pyrf_event__delete, .tp_flags = Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, .tp_doc = pyrf_throttle_event__doc, .tp_members = pyrf_throttle_event__members, + .tp_getset = pyrf_event__getset, .tp_repr = (reprfunc)pyrf_throttle_event__repr, }; @@ -236,9 +281,12 @@ static PyTypeObject pyrf_lost_event__type = { PyVarObject_HEAD_INIT(NULL, 0) .tp_name = "perf.lost_event", .tp_basicsize = sizeof(struct pyrf_event), + .tp_new = PyType_GenericNew, + .tp_dealloc = (destructor)pyrf_event__delete, .tp_flags = Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, .tp_doc = pyrf_lost_event__doc, .tp_members = pyrf_lost_event__members, + .tp_getset = pyrf_event__getset, .tp_repr = (reprfunc)pyrf_lost_event__repr, }; @@ -269,6 +317,7 @@ static PyTypeObject pyrf_read_event__type = { .tp_flags = Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, .tp_doc = pyrf_read_event__doc, .tp_members = pyrf_read_event__members, + .tp_getset = pyrf_event__getset, .tp_repr = (reprfunc)pyrf_read_event__repr, }; @@ -276,17 +325,18 @@ static const char pyrf_sample_event__doc[] = PyDoc_STR("perf sample event object static PyMemberDef pyrf_sample_event__members[] = { sample_members + sample_member_def(sample_ip, ip, T_ULONGLONG, "event ip"), + sample_member_def(sample_time, time, T_ULONGLONG, "event timestamp"), + sample_member_def(sample_addr, addr, T_ULONGLONG, "event addr"), + sample_member_def(sample_phys_addr, phys_addr, T_ULONGLONG, "event physical addr"), + sample_member_def(sample_weight, weight, T_ULONGLONG, "event weight"), + sample_member_def(sample_data_src, data_src, T_ULONGLONG, "event data source"), + sample_member_def(sample_insn_count, insn_cnt, T_ULONGLONG, "event instruction count"), + sample_member_def(sample_cyc_count, cyc_cnt, T_ULONGLONG, "event cycle count"), member_def(perf_event_header, type, T_UINT, "event type"), { .name = NULL, }, }; -static void pyrf_sample_event__delete(struct pyrf_event *pevent) -{ - evsel__put(pevent->sample.evsel); - perf_sample__exit(&pevent->sample); - Py_TYPE(pevent)->tp_free((PyObject*)pevent); -} - static PyObject *pyrf_sample_event__repr(const struct pyrf_event *pevent) { PyObject *ret; @@ -374,6 +424,191 @@ get_tracepoint_field(struct pyrf_event *pevent, PyObject *attr_name) } #endif /* HAVE_LIBTRACEEVENT */ +static int pyrf_sample_event__resolve_al(struct pyrf_event *pevent) +{ + struct evsel *evsel = pevent->sample.evsel; + struct evlist *evlist = evsel ? evsel->evlist : NULL; + struct perf_session *session = evlist ? evlist->session : NULL; + + if (pevent->al_resolved) + return 0; + + if (!session) + return -1; + + addr_location__init(&pevent->al); + if (machine__resolve(&session->machines.host, &pevent->al, &pevent->sample) < 0) { + addr_location__exit(&pevent->al); + return -1; + } + + pevent->al_resolved = true; + return 0; +} + +static PyObject *pyrf_sample_event__get_dso(struct pyrf_event *pevent, + void *closure __maybe_unused) +{ + if (pyrf_sample_event__resolve_al(pevent) < 0 || !pevent->al.map) + Py_RETURN_NONE; + + return PyUnicode_FromString(dso__name(map__dso(pevent->al.map))); +} + +static PyObject *pyrf_sample_event__get_dso_long_name(struct pyrf_event *pevent, + void *closure __maybe_unused) +{ + if (pyrf_sample_event__resolve_al(pevent) < 0 || !pevent->al.map) + Py_RETURN_NONE; + + return PyUnicode_FromString(dso__long_name(map__dso(pevent->al.map))); +} + +static PyObject *pyrf_sample_event__get_dso_bid(struct pyrf_event *pevent, + void *closure __maybe_unused) +{ + char sbuild_id[SBUILD_ID_SIZE]; + + if (pyrf_sample_event__resolve_al(pevent) < 0 || !pevent->al.map) + Py_RETURN_NONE; + + build_id__snprintf(dso__bid(map__dso(pevent->al.map)), sbuild_id, sizeof(sbuild_id)); + return PyUnicode_FromString(sbuild_id); +} + +static PyObject *pyrf_sample_event__get_map_start(struct pyrf_event *pevent, + void *closure __maybe_unused) +{ + if (pyrf_sample_event__resolve_al(pevent) < 0 || !pevent->al.map) + Py_RETURN_NONE; + + return PyLong_FromUnsignedLong(map__start(pevent->al.map)); +} + +static PyObject *pyrf_sample_event__get_map_end(struct pyrf_event *pevent, + void *closure __maybe_unused) +{ + if (pyrf_sample_event__resolve_al(pevent) < 0 || !pevent->al.map) + Py_RETURN_NONE; + + return PyLong_FromUnsignedLong(map__end(pevent->al.map)); +} + +static PyObject *pyrf_sample_event__get_map_pgoff(struct pyrf_event *pevent, + void *closure __maybe_unused) +{ + if (pyrf_sample_event__resolve_al(pevent) < 0 || !pevent->al.map) + Py_RETURN_NONE; + + return PyLong_FromUnsignedLongLong(map__pgoff(pevent->al.map)); +} + +static PyObject *pyrf_sample_event__get_symbol(struct pyrf_event *pevent, + void *closure __maybe_unused) +{ + if (pyrf_sample_event__resolve_al(pevent) < 0 || !pevent->al.sym) + Py_RETURN_NONE; + + return PyUnicode_FromString(pevent->al.sym->name); +} + +static PyObject *pyrf_sample_event__get_sym_start(struct pyrf_event *pevent, + void *closure __maybe_unused) +{ + if (pyrf_sample_event__resolve_al(pevent) < 0 || !pevent->al.sym) + Py_RETURN_NONE; + + return PyLong_FromUnsignedLongLong(pevent->al.sym->start); +} + +static PyObject *pyrf_sample_event__get_sym_end(struct pyrf_event *pevent, + void *closure __maybe_unused) +{ + if (pyrf_sample_event__resolve_al(pevent) < 0 || !pevent->al.sym) + Py_RETURN_NONE; + + return PyLong_FromUnsignedLongLong(pevent->al.sym->end); +} + +static PyObject *pyrf_sample_event__get_raw_buf(struct pyrf_event *pevent, + void *closure __maybe_unused) +{ + if (pevent->event.header.type != PERF_RECORD_SAMPLE) + Py_RETURN_NONE; + + return PyBytes_FromStringAndSize((const char *)pevent->sample.raw_data, + pevent->sample.raw_size); +} + +static PyObject *pyrf_sample_event__srccode(PyObject *self, PyObject *args) +{ + struct pyrf_event *pevent = (void *)self; + u64 addr = pevent->sample.ip; + char *srcfile = NULL; + char *srccode = NULL; + unsigned int line = 0; + int len = 0; + PyObject *result; + + if (!PyArg_ParseTuple(args, "|K", &addr)) + return NULL; + + if (pyrf_sample_event__resolve_al(pevent) < 0) + Py_RETURN_NONE; + + if (addr != pevent->sample.ip) { + thread__find_symbol_fb(pevent->al.thread, pevent->sample.cpumode, addr, + &pevent->al); + } + + if (pevent->al.map) { + struct dso *dso = map__dso(pevent->al.map); + + if (dso) { + srcfile = get_srcline_split(dso, map__rip_2objdump(pevent->al.map, addr), + &line); + } + } + + if (srcfile) { + srccode = find_sourceline(srcfile, line, &len); + result = Py_BuildValue("(sIs#)", srcfile, line, srccode, (Py_ssize_t)len); + free(srcfile); + } else { + result = Py_BuildValue("(sIs#)", NULL, 0, NULL, (Py_ssize_t)0); + } + + return result; +} + +static PyObject *pyrf_sample_event__insn(PyObject *self, PyObject *args __maybe_unused) +{ + struct pyrf_event *pevent = (void *)self; + struct thread *thread; + struct machine *machine; + + if (pyrf_sample_event__resolve_al(pevent) < 0) + Py_RETURN_NONE; + + thread = pevent->al.thread; + + if (!thread || !thread__maps(thread)) + Py_RETURN_NONE; + + machine = maps__machine(thread__maps(thread)); + if (!machine) + Py_RETURN_NONE; + + if (pevent->sample.ip && !pevent->sample.insn_len) + perf_sample__fetch_insn(&pevent->sample, thread, machine); + + if (!pevent->sample.insn_len) + Py_RETURN_NONE; + + return PyBytes_FromStringAndSize((const char *)pevent->sample.insn, + pevent->sample.insn_len); +} + static PyObject* pyrf_sample_event__getattro(struct pyrf_event *pevent, PyObject *attr_name) { @@ -387,13 +622,103 @@ pyrf_sample_event__getattro(struct pyrf_event *pevent, PyObject *attr_name) return obj ?: PyObject_GenericGetAttr((PyObject *) pevent, attr_name); } +static PyGetSetDef pyrf_sample_event__getset[] = { + { + .name = "raw_buf", + .get = (getter)pyrf_sample_event__get_raw_buf, + .set = NULL, + .doc = "event raw buffer.", + }, + { + .name = "evsel", + .get = pyrf_event__get_evsel, + .set = NULL, + .doc = "tracking event.", + }, + { + .name = "dso", + .get = (getter)pyrf_sample_event__get_dso, + .set = NULL, + .doc = "event dso short name.", + }, + { + .name = "dso_long_name", + .get = (getter)pyrf_sample_event__get_dso_long_name, + .set = NULL, + .doc = "event dso long name.", + }, + { + .name = "dso_bid", + .get = (getter)pyrf_sample_event__get_dso_bid, + .set = NULL, + .doc = "event dso build id.", + }, + { + .name = "map_start", + .get = (getter)pyrf_sample_event__get_map_start, + .set = NULL, + .doc = "event map start address.", + }, + { + .name = "map_end", + .get = (getter)pyrf_sample_event__get_map_end, + .set = NULL, + .doc = "event map end address.", + }, + { + .name = "map_pgoff", + .get = (getter)pyrf_sample_event__get_map_pgoff, + .set = NULL, + .doc = "event map page offset.", + }, + { + .name = "symbol", + .get = (getter)pyrf_sample_event__get_symbol, + .set = NULL, + .doc = "event symbol name.", + }, + { + .name = "sym_start", + .get = (getter)pyrf_sample_event__get_sym_start, + .set = NULL, + .doc = "event symbol start address.", + }, + { + .name = "sym_end", + .get = (getter)pyrf_sample_event__get_sym_end, + .set = NULL, + .doc = "event symbol end address.", + }, + { .name = NULL, }, +}; + +static PyMethodDef pyrf_sample_event__methods[] = { + { + .ml_name = "srccode", + .ml_meth = (PyCFunction)pyrf_sample_event__srccode, + .ml_flags = METH_VARARGS, + .ml_doc = PyDoc_STR("Get source code for an address.") + }, + { + .ml_name = "insn", + .ml_meth = (PyCFunction)pyrf_sample_event__insn, + .ml_flags = METH_NOARGS, + .ml_doc = PyDoc_STR("Get instruction bytes for a sample.") + }, + { .ml_name = NULL, } +}; + static PyTypeObject pyrf_sample_event__type = { PyVarObject_HEAD_INIT(NULL, 0) .tp_name = "perf.sample_event", .tp_basicsize = sizeof(struct pyrf_event), + .tp_new = PyType_GenericNew, + .tp_dealloc = (destructor)pyrf_event__delete, .tp_flags = Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, .tp_doc = pyrf_sample_event__doc, .tp_members = pyrf_sample_event__members, + .tp_getset = pyrf_sample_event__getset, + .tp_methods = pyrf_sample_event__methods, .tp_repr = (reprfunc)pyrf_sample_event__repr, .tp_getattro = (getattrofunc) pyrf_sample_event__getattro, }; @@ -429,25 +754,18 @@ static PyTypeObject pyrf_context_switch_event__type = { PyVarObject_HEAD_INIT(NULL, 0) .tp_name = "perf.context_switch_event", .tp_basicsize = sizeof(struct pyrf_event), + .tp_new = PyType_GenericNew, + .tp_dealloc = (destructor)pyrf_event__delete, .tp_flags = Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, .tp_doc = pyrf_context_switch_event__doc, .tp_members = pyrf_context_switch_event__members, + .tp_getset = pyrf_event__getset, .tp_repr = (reprfunc)pyrf_context_switch_event__repr, }; static int pyrf_event__setup_types(void) { int err; - pyrf_mmap_event__type.tp_new = - pyrf_task_event__type.tp_new = - pyrf_comm_event__type.tp_new = - pyrf_lost_event__type.tp_new = - pyrf_read_event__type.tp_new = - pyrf_sample_event__type.tp_new = - pyrf_context_switch_event__type.tp_new = - pyrf_throttle_event__type.tp_new = PyType_GenericNew; - - pyrf_sample_event__type.tp_dealloc = (destructor)pyrf_sample_event__delete, err = PyType_Ready(&pyrf_mmap_event__type); if (err < 0) @@ -1203,7 +1521,7 @@ static PyObject *pyrf_evsel__str(PyObject *self) struct pyrf_evsel *pevsel = (void *)self; struct evsel *evsel = pevsel->evsel; - return PyUnicode_FromFormat("evsel(%s/%s/)", evsel__pmu_name(evsel), evsel__name(evsel)); + return PyUnicode_FromFormat("evsel(%s)", evsel__name(evsel)); } static PyMethodDef pyrf_evsel__methods[] = { @@ -1986,10 +2304,7 @@ static PyObject *pyrf_evlist__str(PyObject *self) evlist__for_each_entry(pevlist->evlist, pos) { if (!first) strbuf_addch(&sb, ','); - if (!pos->pmu) - strbuf_addstr(&sb, evsel__name(pos)); - else - strbuf_addf(&sb, "%s/%s/", pos->pmu->name, evsel__name(pos)); + strbuf_addstr(&sb, evsel__name(pos)); first = false; } strbuf_addstr(&sb, "])"); -- 2.54.0.rc1.513.gad8abe7a5a-goog