Merge remote-tracking branch 'torvalds/master' into perf/core
[linux-2.6-microblaze.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 <tzanussi@gmail.com>
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/trace-event.h"
16 #include "../../../util/event.h"
17 #include "../../../util/symbol.h"
18 #include "../../../util/thread.h"
19 #include "../../../util/map.h"
20 #include "../../../util/maps.h"
21 #include "../../../util/auxtrace.h"
22 #include "../../../util/session.h"
23 #include "../../../util/srcline.h"
24 #include "../../../util/srccode.h"
25
26 #if PY_MAJOR_VERSION < 3
27 #define _PyCapsule_GetPointer(arg1, arg2) \
28   PyCObject_AsVoidPtr(arg1)
29 #define _PyBytes_FromStringAndSize(arg1, arg2) \
30   PyString_FromStringAndSize((arg1), (arg2))
31 #define _PyUnicode_AsUTF8(arg) \
32   PyString_AsString(arg)
33
34 PyMODINIT_FUNC initperf_trace_context(void);
35 #else
36 #define _PyCapsule_GetPointer(arg1, arg2) \
37   PyCapsule_GetPointer((arg1), (arg2))
38 #define _PyBytes_FromStringAndSize(arg1, arg2) \
39   PyBytes_FromStringAndSize((arg1), (arg2))
40 #define _PyUnicode_AsUTF8(arg) \
41   PyUnicode_AsUTF8(arg)
42
43 PyMODINIT_FUNC PyInit_perf_trace_context(void);
44 #endif
45
46 static struct scripting_context *get_args(PyObject *args, const char *name, PyObject **arg2)
47 {
48         int cnt = 1 + !!arg2;
49         PyObject *context;
50
51         if (!PyArg_UnpackTuple(args, name, 1, cnt, &context, arg2))
52                 return NULL;
53
54         return _PyCapsule_GetPointer(context, NULL);
55 }
56
57 static struct scripting_context *get_scripting_context(PyObject *args)
58 {
59         return get_args(args, "context", NULL);
60 }
61
62 static PyObject *perf_trace_context_common_pc(PyObject *obj, PyObject *args)
63 {
64         struct scripting_context *c = get_scripting_context(args);
65
66         if (!c)
67                 return NULL;
68
69         return Py_BuildValue("i", common_pc(c));
70 }
71
72 static PyObject *perf_trace_context_common_flags(PyObject *obj,
73                                                  PyObject *args)
74 {
75         struct scripting_context *c = get_scripting_context(args);
76
77         if (!c)
78                 return NULL;
79
80         return Py_BuildValue("i", common_flags(c));
81 }
82
83 static PyObject *perf_trace_context_common_lock_depth(PyObject *obj,
84                                                       PyObject *args)
85 {
86         struct scripting_context *c = get_scripting_context(args);
87
88         if (!c)
89                 return NULL;
90
91         return Py_BuildValue("i", common_lock_depth(c));
92 }
93
94 static PyObject *perf_sample_insn(PyObject *obj, PyObject *args)
95 {
96         struct scripting_context *c = get_scripting_context(args);
97
98         if (!c)
99                 return NULL;
100
101         if (c->sample->ip && !c->sample->insn_len &&
102             c->al->thread->maps && c->al->thread->maps->machine)
103                 script_fetch_insn(c->sample, c->al->thread, c->al->thread->maps->machine);
104
105         if (!c->sample->insn_len)
106                 Py_RETURN_NONE; /* N.B. This is a return statement */
107
108         return _PyBytes_FromStringAndSize(c->sample->insn, c->sample->insn_len);
109 }
110
111 static PyObject *perf_set_itrace_options(PyObject *obj, PyObject *args)
112 {
113         struct scripting_context *c;
114         const char *itrace_options;
115         int retval = -1;
116         PyObject *str;
117
118         c = get_args(args, "itrace_options", &str);
119         if (!c)
120                 return NULL;
121
122         if (!c->session || !c->session->itrace_synth_opts)
123                 goto out;
124
125         if (c->session->itrace_synth_opts->set) {
126                 retval = 1;
127                 goto out;
128         }
129
130         itrace_options = _PyUnicode_AsUTF8(str);
131
132         retval = itrace_do_parse_synth_opts(c->session->itrace_synth_opts, itrace_options, 0);
133 out:
134         return Py_BuildValue("i", retval);
135 }
136
137 static PyObject *perf_sample_src(PyObject *obj, PyObject *args, bool get_srccode)
138 {
139         struct scripting_context *c = get_scripting_context(args);
140         unsigned int line = 0;
141         char *srcfile = NULL;
142         char *srccode = NULL;
143         PyObject *result;
144         struct map *map;
145         int len = 0;
146         u64 addr;
147
148         if (!c)
149                 return NULL;
150
151         map = c->al->map;
152         addr = c->al->addr;
153
154         if (map && map->dso)
155                 srcfile = get_srcline_split(map->dso, map__rip_2objdump(map, addr), &line);
156
157         if (get_srccode) {
158                 if (srcfile)
159                         srccode = find_sourceline(srcfile, line, &len);
160                 result = Py_BuildValue("(sIs#)", srcfile, line, srccode, (Py_ssize_t)len);
161         } else {
162                 result = Py_BuildValue("(sI)", srcfile, line);
163         }
164
165         free(srcfile);
166
167         return result;
168 }
169
170 static PyObject *perf_sample_srcline(PyObject *obj, PyObject *args)
171 {
172         return perf_sample_src(obj, args, false);
173 }
174
175 static PyObject *perf_sample_srccode(PyObject *obj, PyObject *args)
176 {
177         return perf_sample_src(obj, args, true);
178 }
179
180 static PyMethodDef ContextMethods[] = {
181         { "common_pc", perf_trace_context_common_pc, METH_VARARGS,
182           "Get the common preempt count event field value."},
183         { "common_flags", perf_trace_context_common_flags, METH_VARARGS,
184           "Get the common flags event field value."},
185         { "common_lock_depth", perf_trace_context_common_lock_depth,
186           METH_VARARGS, "Get the common lock depth event field value."},
187         { "perf_sample_insn", perf_sample_insn,
188           METH_VARARGS, "Get the machine code instruction."},
189         { "perf_set_itrace_options", perf_set_itrace_options,
190           METH_VARARGS, "Set --itrace options."},
191         { "perf_sample_srcline", perf_sample_srcline,
192           METH_VARARGS, "Get source file name and line number."},
193         { "perf_sample_srccode", perf_sample_srccode,
194           METH_VARARGS, "Get source file name, line number and line."},
195         { NULL, NULL, 0, NULL}
196 };
197
198 #if PY_MAJOR_VERSION < 3
199 PyMODINIT_FUNC initperf_trace_context(void)
200 {
201         (void) Py_InitModule("perf_trace_context", ContextMethods);
202 }
203 #else
204 PyMODINIT_FUNC PyInit_perf_trace_context(void)
205 {
206         static struct PyModuleDef moduledef = {
207                 PyModuleDef_HEAD_INIT,
208                 "perf_trace_context",   /* m_name */
209                 "",                     /* m_doc */
210                 -1,                     /* m_size */
211                 ContextMethods,         /* m_methods */
212                 NULL,                   /* m_reload */
213                 NULL,                   /* m_traverse */
214                 NULL,                   /* m_clear */
215                 NULL,                   /* m_free */
216         };
217         PyObject *mod;
218
219         mod = PyModule_Create(&moduledef);
220         /* Add perf_script_context to the module so it can be imported */
221         PyObject_SetAttrString(mod, "perf_script_context", Py_None);
222
223         return mod;
224 }
225 #endif