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Add support for Intel PT call_return events and itrace options to the
perf Python extension so standalone Python scripts can decode and
inspect low-level instruction traces.
Specifically:
- Add a call_return callback parameter and itrace option string to
perf.session, treating explicit None (Py_None) callbacks as omitted.
- Expose the perf.call_return object with db_id, parent_id, insn_count,
cyc_count, comm, pid, tid, call_time, return_time, branch_count,
call_ref, return_ref, flags, and call_path (resolved as a
perf.callchain ordered from outermost caller to callee, populating
frame->map and frame->sym so call_path entries expose resolved symbol
and DSO names).
- Export perf.CALL_RETURN_NO_CALL, perf.CALL_RETURN_NO_RETURN, and
perf.CALL_RETURN_NON_CALL flag constants.
- Expose session.e_machine and session.is_64_bit properties, preferring
recorded thread ELF machines (perf_session__e_machine) over perf_env
so pipe-mode traces do not prematurely cache host bitness.
- Support optional vmlinux, kallsyms, and symfs symbol configuration
parameters (and PERF_SYMBOL_VMLINUX, PERF_SYMBOL_KALLSYMS,
PERF_SYMBOL_SYMFS environment fallbacks) in perf.session, resetting
symbol_conf pointers and freeing vm_tm_corr_args, cpu_bitmap, and
ptime_range in pyrf_session__delete().
Assisted-by: Antigravity:gemini-3.1-pro
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Expose destination address location components (addr_dso, addr_symbol,
addr_sym_offset), branch/transaction metrics (branch_type, in_tx,
flags, transaction), machine_pid, vcpu, sym_offset, and context_switch
callbacks directly to the Python extension.
Also include supporting fixes and infrastructure updates in
util/python.c and perf.pyi:
- Support fetching sym_offset on resolved sample symbols.
- Populate sample machine_pid and vcpu from evlist__id2sid() when
perf_guest is enabled, and resolve samples against the matching guest
or host machine.
- Expose next_prev_pid and next_prev_tid on switch_event only for
PERF_RECORD_SWITCH_CPU_WIDE records (returning None otherwise).
- Wire up tracing_data in pyrf_session__new() and update perf.pyi type
stubs (including srccode() and insn() return types).
Assisted-by: Antigravity:gemini-3.1-pro
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Update pyrf_session__find_thread() in util/python.c to accept an
optional tid parameter (defaulting to pid) and return None instead of
raising TypeError when a thread is not found in the session machines.
Update perf.pyi to match:
- Set session.find_thread() signature to (pid: int, tid: int = -1) ->
Optional[thread].
- Update callchain_node.symbol and callchain_node.dso to str (the C
getters return "[unknown]" fallback strings rather than None) and add
__iter__() to callchain.
Also update treport.py to handle Optional[thread] returned by
session.find_thread().
Assisted-by: Antigravity:gemini-3.1-pro
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Update the PyArg_ParseTupleAndKeywords format string for
pyrf__syscall_name() and pyrf__syscall_id() from "i|$i" to "i|i" (and
"s|$i" to "s|i"), allowing elf_machine to be passed as an optional
positional argument as well as a keyword argument. Update syscall_id()
and syscall_name() in perf.pyi to match, and set the return type of
syscall_name() to Optional[str] as unknown syscall numbers return None.
Also expose perf_env__arch_strerrno() as perf.arch_strerrno(err,
elf_machine=None) so standalone Python scripts can resolve
architecture-specific errno names directly from the auto-generated
trace beauty tables instead of maintaining duplicate errno dictionaries
in Python. Tighten the macro pattern in arch_errno_names.sh to
E[A-Z0-9]+ so compiler -D flags containing underscores (such as LLVM's
-DEXPERIMENTAL_KEY_INSTRUCTIONS=1) do not shadow EPERM (1), and add
EM_SPARC32PLUS alongside EM_SPARC and EM_SPARCV9.
Assisted-by: Antigravity:gemini-3.1-pro
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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The metrics() function can return a dictionary where the value is either
a string or a list of strings, so the type signature in the stub file
should be Union[str, List[str]].
Fixes: 430da3cd03b4 ("perf python: Add perf.pyi stubs file")
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
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Add Python type stubs for the perf module to improve IDE support and
static analysis. Includes docstrings for classes, methods, and
constants derived from C source and JSON definitions.
Assisted-by: Gemini:gemini-3.1-pro-preview
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alice Rogers <alice.mei.rogers@gmail.com>
Cc: Dapeng Mi <dapeng1.mi@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
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