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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Context.c. Python interfaces for perf script.
*
* Copyright (C) 2010 Tom Zanussi <tzanussi@gmail.com>
*/
/*
* Use Py_ssize_t for '#' formats to avoid DeprecationWarning: PY_SSIZE_T_CLEAN
* will be required for '#' formats.
*/
#define PY_SSIZE_T_CLEAN
#include <Python.h>
#include "../../../util/trace-event.h"
#include "../../../util/event.h"
#include "../../../util/symbol.h"
#include "../../../util/thread.h"
#include "../../../util/map.h"
#include "../../../util/maps.h"
#include "../../../util/auxtrace.h"
#include "../../../util/session.h"
#include "../../../util/srcline.h"
#include "../../../util/srccode.h"
#if PY_MAJOR_VERSION < 3
#define _PyCapsule_GetPointer(arg1, arg2) \
PyCObject_AsVoidPtr(arg1)
#define _PyBytes_FromStringAndSize(arg1, arg2) \
PyString_FromStringAndSize((arg1), (arg2))
#define _PyUnicode_AsUTF8(arg) \
PyString_AsString(arg)
PyMODINIT_FUNC initperf_trace_context(void);
#else
#define _PyCapsule_GetPointer(arg1, arg2) \
PyCapsule_GetPointer((arg1), (arg2))
#define _PyBytes_FromStringAndSize(arg1, arg2) \
PyBytes_FromStringAndSize((arg1), (arg2))
#define _PyUnicode_AsUTF8(arg) \
PyUnicode_AsUTF8(arg)
PyMODINIT_FUNC PyInit_perf_trace_context(void);
#endif
static struct scripting_context *get_args(PyObject *args, const char *name, PyObject **arg2)
{
int cnt = 1 + !!arg2;
PyObject *context;
if (!PyArg_UnpackTuple(args, name, 1, cnt, &context, arg2))
return NULL;
return _PyCapsule_GetPointer(context, NULL);
}
static struct scripting_context *get_scripting_context(PyObject *args)
{
return get_args(args, "context", NULL);
}
#ifdef HAVE_LIBTRACEEVENT
static PyObject *perf_trace_context_common_pc(PyObject *obj, PyObject *args)
{
struct scripting_context *c = get_scripting_context(args);
if (!c)
return NULL;
return Py_BuildValue("i", common_pc(c));
}
static PyObject *perf_trace_context_common_flags(PyObject *obj,
PyObject *args)
{
struct scripting_context *c = get_scripting_context(args);
if (!c)
return NULL;
return Py_BuildValue("i", common_flags(c));
}
static PyObject *perf_trace_context_common_lock_depth(PyObject *obj,
PyObject *args)
{
struct scripting_context *c = get_scripting_context(args);
if (!c)
return NULL;
return Py_BuildValue("i", common_lock_depth(c));
}
#endif
static PyObject *perf_sample_insn(PyObject *obj, PyObject *args)
{
struct scripting_context *c = get_scripting_context(args);
if (!c)
return NULL;
if (c->sample->ip && !c->sample->insn_len && thread__maps(c->al->thread)) {
struct machine *machine = maps__machine(thread__maps(c->al->thread));
script_fetch_insn(c->sample, c->al->thread, machine);
}
if (!c->sample->insn_len)
Py_RETURN_NONE; /* N.B. This is a return statement */
return _PyBytes_FromStringAndSize(c->sample->insn, c->sample->insn_len);
}
static PyObject *perf_set_itrace_options(PyObject *obj, PyObject *args)
{
struct scripting_context *c;
const char *itrace_options;
int retval = -1;
PyObject *str;
c = get_args(args, "itrace_options", &str);
if (!c)
return NULL;
if (!c->session || !c->session->itrace_synth_opts)
goto out;
if (c->session->itrace_synth_opts->set) {
retval = 1;
goto out;
}
itrace_options = _PyUnicode_AsUTF8(str);
retval = itrace_do_parse_synth_opts(c->session->itrace_synth_opts, itrace_options, 0);
out:
return Py_BuildValue("i", retval);
}
static PyObject *perf_sample_src(PyObject *obj, PyObject *args, bool get_srccode)
{
struct scripting_context *c = get_scripting_context(args);
unsigned int line = 0;
char *srcfile = NULL;
char *srccode = NULL;
PyObject *result;
struct map *map;
struct dso *dso;
int len = 0;
u64 addr;
if (!c)
return NULL;
map = c->al->map;
addr = c->al->addr;
dso = map ? map__dso(map) : NULL;
if (dso)
srcfile = get_srcline_split(dso, map__rip_2objdump(map, addr), &line);
if (get_srccode) {
if (srcfile)
srccode = find_sourceline(srcfile, line, &len);
result = Py_BuildValue("(sIs#)", srcfile, line, srccode, (Py_ssize_t)len);
} else {
result = Py_BuildValue("(sI)", srcfile, line);
}
free(srcfile);
return result;
}
static PyObject *perf_sample_srcline(PyObject *obj, PyObject *args)
{
return perf_sample_src(obj, args, false);
}
static PyObject *perf_sample_srccode(PyObject *obj, PyObject *args)
{
return perf_sample_src(obj, args, true);
}
static PyMethodDef ContextMethods[] = {
#ifdef HAVE_LIBTRACEEVENT
{ "common_pc", perf_trace_context_common_pc, METH_VARARGS,
"Get the common preempt count event field value."},
{ "common_flags", perf_trace_context_common_flags, METH_VARARGS,
"Get the common flags event field value."},
{ "common_lock_depth", perf_trace_context_common_lock_depth,
METH_VARARGS, "Get the common lock depth event field value."},
#endif
{ "perf_sample_insn", perf_sample_insn,
METH_VARARGS, "Get the machine code instruction."},
{ "perf_set_itrace_options", perf_set_itrace_options,
METH_VARARGS, "Set --itrace options."},
{ "perf_sample_srcline", perf_sample_srcline,
METH_VARARGS, "Get source file name and line number."},
{ "perf_sample_srccode", perf_sample_srccode,
METH_VARARGS, "Get source file name, line number and line."},
{ NULL, NULL, 0, NULL}
};
#if PY_MAJOR_VERSION < 3
PyMODINIT_FUNC initperf_trace_context(void)
{
(void) Py_InitModule("perf_trace_context", ContextMethods);
}
#else
PyMODINIT_FUNC PyInit_perf_trace_context(void)
{
static struct PyModuleDef moduledef = {
PyModuleDef_HEAD_INIT,
"perf_trace_context", /* m_name */
"", /* m_doc */
-1, /* m_size */
ContextMethods, /* m_methods */
NULL, /* m_reload */
NULL, /* m_traverse */
NULL, /* m_clear */
NULL, /* m_free */
};
PyObject *mod;
mod = PyModule_Create(&moduledef);
/* Add perf_script_context to the module so it can be imported */
PyObject_SetAttrString(mod, "perf_script_context", Py_None);
return mod;
}
#endif
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