probe-event.c (190b57fcb9c5fed5414935a174094f534fc510bc) probe-event.c (14a8fd7ceea6915c613746203d6e9a2bf273f16c)
1/*
2 * probe-event.c : perf-probe definition to probe_events format converter
3 *
4 * Written by Masami Hiramatsu <mhiramat@redhat.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or

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112 NULL);
113}
114
115static struct map *kernel_get_module_map(const char *module)
116{
117 struct rb_node *nd;
118 struct map_groups *grp = &machine.kmaps;
119
1/*
2 * probe-event.c : perf-probe definition to probe_events format converter
3 *
4 * Written by Masami Hiramatsu <mhiramat@redhat.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or

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112 NULL);
113}
114
115static struct map *kernel_get_module_map(const char *module)
116{
117 struct rb_node *nd;
118 struct map_groups *grp = &machine.kmaps;
119
120 /* A file path -- this is an offline module */
121 if (module && strchr(module, '/'))
122 return machine__new_module(&machine, 0, module);
123
120 if (!module)
121 module = "kernel";
122
123 for (nd = rb_first(&grp->maps[MAP__FUNCTION]); nd; nd = rb_next(nd)) {
124 struct map *pos = rb_entry(nd, struct map, rb_node);
125 if (strncmp(pos->dso->short_name + 1, module,
126 pos->dso->short_name_len - 2) == 0) {
127 return pos;

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168 struct dso *dso = kernel_get_module_dso(module);
169 return (dso) ? dso->long_name : NULL;
170}
171
172#ifdef DWARF_SUPPORT
173/* Open new debuginfo of given module */
174static struct debuginfo *open_debuginfo(const char *module)
175{
124 if (!module)
125 module = "kernel";
126
127 for (nd = rb_first(&grp->maps[MAP__FUNCTION]); nd; nd = rb_next(nd)) {
128 struct map *pos = rb_entry(nd, struct map, rb_node);
129 if (strncmp(pos->dso->short_name + 1, module,
130 pos->dso->short_name_len - 2) == 0) {
131 return pos;

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172 struct dso *dso = kernel_get_module_dso(module);
173 return (dso) ? dso->long_name : NULL;
174}
175
176#ifdef DWARF_SUPPORT
177/* Open new debuginfo of given module */
178static struct debuginfo *open_debuginfo(const char *module)
179{
176 const char *path = kernel_get_module_path(module);
180 const char *path;
177
181
178 if (!path) {
179 pr_err("Failed to find path of %s module.\n",
180 module ?: "kernel");
181 return NULL;
182 /* A file path -- this is an offline module */
183 if (module && strchr(module, '/'))
184 path = module;
185 else {
186 path = kernel_get_module_path(module);
187
188 if (!path) {
189 pr_err("Failed to find path of %s module.\n",
190 module ?: "kernel");
191 return NULL;
192 }
182 }
183 return debuginfo__new(path);
184}
185
186/*
187 * Convert trace point to probe point with debuginfo
188 * Currently only handles kprobes.
189 */

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224 pp->retprobe = tp->retprobe;
225
226 return 0;
227}
228
229static int add_module_to_probe_trace_events(struct probe_trace_event *tevs,
230 int ntevs, const char *module)
231{
193 }
194 return debuginfo__new(path);
195}
196
197/*
198 * Convert trace point to probe point with debuginfo
199 * Currently only handles kprobes.
200 */

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235 pp->retprobe = tp->retprobe;
236
237 return 0;
238}
239
240static int add_module_to_probe_trace_events(struct probe_trace_event *tevs,
241 int ntevs, const char *module)
242{
232 int i;
243 int i, ret = 0;
244 char *tmp;
245
246 if (!module)
247 return 0;
248
249 tmp = strrchr(module, '/');
250 if (tmp) {
251 /* This is a module path -- get the module name */
252 module = strdup(tmp + 1);
253 if (!module)
254 return -ENOMEM;
255 tmp = strchr(module, '.');
256 if (tmp)
257 *tmp = '\0';
258 tmp = (char *)module; /* For free() */
259 }
260
233 for (i = 0; i < ntevs; i++) {
234 tevs[i].point.module = strdup(module);
261 for (i = 0; i < ntevs; i++) {
262 tevs[i].point.module = strdup(module);
235 if (!tevs[i].point.module)
236 return -ENOMEM;
263 if (!tevs[i].point.module) {
264 ret = -ENOMEM;
265 break;
266 }
237 }
267 }
238 return 0;
268
269 if (tmp)
270 free(tmp);
271
272 return ret;
239}
240
241/* Try to find perf_probe_event with debuginfo */
242static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
243 struct probe_trace_event **tevs,
244 int max_tevs, const char *module)
245{
246 bool need_dwarf = perf_probe_event_need_dwarf(pev);

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274
275/* Try to find perf_probe_event with debuginfo */
276static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
277 struct probe_trace_event **tevs,
278 int max_tevs, const char *module)
279{
280 bool need_dwarf = perf_probe_event_need_dwarf(pev);

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