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[linux.git] / tools / perf / scripts / python / Perf-Trace-Util / Context.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Context.c.  Python interfaces for perf script.
4  *
5  * Copyright (C) 2010 Tom Zanussi <[email protected]>
6  */
7
8 /*
9  * Use Py_ssize_t for '#' formats to avoid DeprecationWarning: PY_SSIZE_T_CLEAN
10  * will be required for '#' formats.
11  */
12 #define PY_SSIZE_T_CLEAN
13
14 #include <Python.h>
15 #include "../../../util/config.h"
16 #include "../../../util/trace-event.h"
17 #include "../../../util/event.h"
18 #include "../../../util/symbol.h"
19 #include "../../../util/thread.h"
20 #include "../../../util/map.h"
21 #include "../../../util/maps.h"
22 #include "../../../util/auxtrace.h"
23 #include "../../../util/session.h"
24 #include "../../../util/srcline.h"
25 #include "../../../util/srccode.h"
26
27 #define _PyCapsule_GetPointer(arg1, arg2) \
28   PyCapsule_GetPointer((arg1), (arg2))
29 #define _PyBytes_FromStringAndSize(arg1, arg2) \
30   PyBytes_FromStringAndSize((arg1), (arg2))
31 #define _PyUnicode_AsUTF8(arg) \
32   PyUnicode_AsUTF8(arg)
33
34 PyMODINIT_FUNC PyInit_perf_trace_context(void);
35
36 static struct scripting_context *get_args(PyObject *args, const char *name, PyObject **arg2)
37 {
38         int cnt = 1 + !!arg2;
39         PyObject *context;
40
41         if (!PyArg_UnpackTuple(args, name, 1, cnt, &context, arg2))
42                 return NULL;
43
44         return _PyCapsule_GetPointer(context, NULL);
45 }
46
47 static struct scripting_context *get_scripting_context(PyObject *args)
48 {
49         return get_args(args, "context", NULL);
50 }
51
52 #ifdef HAVE_LIBTRACEEVENT
53 static PyObject *perf_trace_context_common_pc(PyObject *obj, PyObject *args)
54 {
55         struct scripting_context *c = get_scripting_context(args);
56
57         if (!c)
58                 return NULL;
59
60         return Py_BuildValue("i", common_pc(c));
61 }
62
63 static PyObject *perf_trace_context_common_flags(PyObject *obj,
64                                                  PyObject *args)
65 {
66         struct scripting_context *c = get_scripting_context(args);
67
68         if (!c)
69                 return NULL;
70
71         return Py_BuildValue("i", common_flags(c));
72 }
73
74 static PyObject *perf_trace_context_common_lock_depth(PyObject *obj,
75                                                       PyObject *args)
76 {
77         struct scripting_context *c = get_scripting_context(args);
78
79         if (!c)
80                 return NULL;
81
82         return Py_BuildValue("i", common_lock_depth(c));
83 }
84 #endif
85
86 static PyObject *perf_sample_insn(PyObject *obj, PyObject *args)
87 {
88         struct scripting_context *c = get_scripting_context(args);
89
90         if (!c)
91                 return NULL;
92
93         if (c->sample->ip && !c->sample->insn_len && thread__maps(c->al->thread)) {
94                 struct machine *machine =  maps__machine(thread__maps(c->al->thread));
95
96                 script_fetch_insn(c->sample, c->al->thread, machine, /*native_arch=*/true);
97         }
98         if (!c->sample->insn_len)
99                 Py_RETURN_NONE; /* N.B. This is a return statement */
100
101         return _PyBytes_FromStringAndSize(c->sample->insn, c->sample->insn_len);
102 }
103
104 static PyObject *perf_set_itrace_options(PyObject *obj, PyObject *args)
105 {
106         struct scripting_context *c;
107         const char *itrace_options;
108         int retval = -1;
109         PyObject *str;
110
111         c = get_args(args, "itrace_options", &str);
112         if (!c)
113                 return NULL;
114
115         if (!c->session || !c->session->itrace_synth_opts)
116                 goto out;
117
118         if (c->session->itrace_synth_opts->set) {
119                 retval = 1;
120                 goto out;
121         }
122
123         itrace_options = _PyUnicode_AsUTF8(str);
124
125         retval = itrace_do_parse_synth_opts(c->session->itrace_synth_opts, itrace_options, 0);
126 out:
127         return Py_BuildValue("i", retval);
128 }
129
130 static PyObject *perf_sample_src(PyObject *obj, PyObject *args, bool get_srccode)
131 {
132         struct scripting_context *c = get_scripting_context(args);
133         unsigned int line = 0;
134         char *srcfile = NULL;
135         char *srccode = NULL;
136         PyObject *result;
137         struct map *map;
138         struct dso *dso;
139         int len = 0;
140         u64 addr;
141
142         if (!c)
143                 return NULL;
144
145         map = c->al->map;
146         addr = c->al->addr;
147         dso = map ? map__dso(map) : NULL;
148
149         if (dso)
150                 srcfile = get_srcline_split(dso, map__rip_2objdump(map, addr), &line);
151
152         if (get_srccode) {
153                 if (srcfile)
154                         srccode = find_sourceline(srcfile, line, &len);
155                 result = Py_BuildValue("(sIs#)", srcfile, line, srccode, (Py_ssize_t)len);
156         } else {
157                 result = Py_BuildValue("(sI)", srcfile, line);
158         }
159
160         free(srcfile);
161
162         return result;
163 }
164
165 static PyObject *perf_sample_srcline(PyObject *obj, PyObject *args)
166 {
167         return perf_sample_src(obj, args, false);
168 }
169
170 static PyObject *perf_sample_srccode(PyObject *obj, PyObject *args)
171 {
172         return perf_sample_src(obj, args, true);
173 }
174
175 static PyObject *__perf_config_get(PyObject *obj, PyObject *args)
176 {
177         const char *config_name;
178
179         if (!PyArg_ParseTuple(args, "s", &config_name))
180                 return NULL;
181         return Py_BuildValue("s", perf_config_get(config_name));
182 }
183
184 static PyMethodDef ContextMethods[] = {
185 #ifdef HAVE_LIBTRACEEVENT
186         { "common_pc", perf_trace_context_common_pc, METH_VARARGS,
187           "Get the common preempt count event field value."},
188         { "common_flags", perf_trace_context_common_flags, METH_VARARGS,
189           "Get the common flags event field value."},
190         { "common_lock_depth", perf_trace_context_common_lock_depth,
191           METH_VARARGS, "Get the common lock depth event field value."},
192 #endif
193         { "perf_sample_insn", perf_sample_insn,
194           METH_VARARGS, "Get the machine code instruction."},
195         { "perf_set_itrace_options", perf_set_itrace_options,
196           METH_VARARGS, "Set --itrace options."},
197         { "perf_sample_srcline", perf_sample_srcline,
198           METH_VARARGS, "Get source file name and line number."},
199         { "perf_sample_srccode", perf_sample_srccode,
200           METH_VARARGS, "Get source file name, line number and line."},
201         { "perf_config_get", __perf_config_get, METH_VARARGS, "Get perf config entry"},
202         { NULL, NULL, 0, NULL}
203 };
204
205 PyMODINIT_FUNC PyInit_perf_trace_context(void)
206 {
207         static struct PyModuleDef moduledef = {
208                 PyModuleDef_HEAD_INIT,
209                 "perf_trace_context",   /* m_name */
210                 "",                     /* m_doc */
211                 -1,                     /* m_size */
212                 ContextMethods,         /* m_methods */
213                 NULL,                   /* m_reload */
214                 NULL,                   /* m_traverse */
215                 NULL,                   /* m_clear */
216                 NULL,                   /* m_free */
217         };
218         PyObject *mod;
219
220         mod = PyModule_Create(&moduledef);
221         /* Add perf_script_context to the module so it can be imported */
222         PyObject_SetAttrString(mod, "perf_script_context", Py_None);
223
224         return mod;
225 }
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