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Linux/tools/perf/util/machine.h

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  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 #ifndef __PERF_MACHINE_H
  3 #define __PERF_MACHINE_H
  4 
  5 #include <sys/types.h>
  6 #include <linux/rbtree.h>
  7 #include "map.h"
  8 #include "dso.h"
  9 #include "event.h"
 10 #include "rwsem.h"
 11 
 12 struct addr_location;
 13 struct branch_stack;
 14 struct perf_evsel;
 15 struct perf_sample;
 16 struct symbol;
 17 struct thread;
 18 union perf_event;
 19 
 20 /* Native host kernel uses -1 as pid index in machine */
 21 #define HOST_KERNEL_ID                  (-1)
 22 #define DEFAULT_GUEST_KERNEL_ID         (0)
 23 
 24 extern const char *ref_reloc_sym_names[];
 25 
 26 struct vdso_info;
 27 
 28 #define THREADS__TABLE_BITS     8
 29 #define THREADS__TABLE_SIZE     (1 << THREADS__TABLE_BITS)
 30 
 31 struct threads {
 32         struct rb_root    entries;
 33         struct rw_semaphore lock;
 34         unsigned int      nr;
 35         struct list_head  dead;
 36         struct thread     *last_match;
 37 };
 38 
 39 struct machine {
 40         struct rb_node    rb_node;
 41         pid_t             pid;
 42         u16               id_hdr_size;
 43         bool              comm_exec;
 44         bool              kptr_restrict_warned;
 45         bool              single_address_space;
 46         char              *root_dir;
 47         char              *mmap_name;
 48         struct threads    threads[THREADS__TABLE_SIZE];
 49         struct vdso_info  *vdso_info;
 50         struct perf_env   *env;
 51         struct dsos       dsos;
 52         struct map_groups kmaps;
 53         struct map        *vmlinux_map;
 54         u64               kernel_start;
 55         pid_t             *current_tid;
 56         union { /* Tool specific area */
 57                 void      *priv;
 58                 u64       db_id;
 59         };
 60         bool              trampolines_mapped;
 61 };
 62 
 63 static inline struct threads *machine__threads(struct machine *machine, pid_t tid)
 64 {
 65         /* Cast it to handle tid == -1 */
 66         return &machine->threads[(unsigned int)tid % THREADS__TABLE_SIZE];
 67 }
 68 
 69 /*
 70  * The main kernel (vmlinux) map
 71  */
 72 static inline
 73 struct map *machine__kernel_map(struct machine *machine)
 74 {
 75         return machine->vmlinux_map;
 76 }
 77 
 78 /*
 79  * kernel (the one returned by machine__kernel_map()) plus kernel modules maps
 80  */
 81 static inline
 82 struct maps *machine__kernel_maps(struct machine *machine)
 83 {
 84         return &machine->kmaps.maps;
 85 }
 86 
 87 int machine__get_kernel_start(struct machine *machine);
 88 
 89 static inline u64 machine__kernel_start(struct machine *machine)
 90 {
 91         if (!machine->kernel_start)
 92                 machine__get_kernel_start(machine);
 93         return machine->kernel_start;
 94 }
 95 
 96 static inline bool machine__kernel_ip(struct machine *machine, u64 ip)
 97 {
 98         u64 kernel_start = machine__kernel_start(machine);
 99 
100         return ip >= kernel_start;
101 }
102 
103 u8 machine__addr_cpumode(struct machine *machine, u8 cpumode, u64 addr);
104 
105 struct thread *machine__find_thread(struct machine *machine, pid_t pid,
106                                     pid_t tid);
107 struct comm *machine__thread_exec_comm(struct machine *machine,
108                                        struct thread *thread);
109 
110 int machine__process_comm_event(struct machine *machine, union perf_event *event,
111                                 struct perf_sample *sample);
112 int machine__process_exit_event(struct machine *machine, union perf_event *event,
113                                 struct perf_sample *sample);
114 int machine__process_fork_event(struct machine *machine, union perf_event *event,
115                                 struct perf_sample *sample);
116 int machine__process_lost_event(struct machine *machine, union perf_event *event,
117                                 struct perf_sample *sample);
118 int machine__process_lost_samples_event(struct machine *machine, union perf_event *event,
119                                         struct perf_sample *sample);
120 int machine__process_aux_event(struct machine *machine,
121                                union perf_event *event);
122 int machine__process_itrace_start_event(struct machine *machine,
123                                         union perf_event *event);
124 int machine__process_switch_event(struct machine *machine,
125                                   union perf_event *event);
126 int machine__process_namespaces_event(struct machine *machine,
127                                       union perf_event *event,
128                                       struct perf_sample *sample);
129 int machine__process_mmap_event(struct machine *machine, union perf_event *event,
130                                 struct perf_sample *sample);
131 int machine__process_mmap2_event(struct machine *machine, union perf_event *event,
132                                  struct perf_sample *sample);
133 int machine__process_event(struct machine *machine, union perf_event *event,
134                                 struct perf_sample *sample);
135 
136 typedef void (*machine__process_t)(struct machine *machine, void *data);
137 
138 struct machines {
139         struct machine host;
140         struct rb_root guests;
141 };
142 
143 void machines__init(struct machines *machines);
144 void machines__exit(struct machines *machines);
145 
146 void machines__process_guests(struct machines *machines,
147                               machine__process_t process, void *data);
148 
149 struct machine *machines__add(struct machines *machines, pid_t pid,
150                               const char *root_dir);
151 struct machine *machines__find_host(struct machines *machines);
152 struct machine *machines__find(struct machines *machines, pid_t pid);
153 struct machine *machines__findnew(struct machines *machines, pid_t pid);
154 
155 void machines__set_id_hdr_size(struct machines *machines, u16 id_hdr_size);
156 void machines__set_comm_exec(struct machines *machines, bool comm_exec);
157 
158 struct machine *machine__new_host(void);
159 struct machine *machine__new_kallsyms(void);
160 int machine__init(struct machine *machine, const char *root_dir, pid_t pid);
161 void machine__exit(struct machine *machine);
162 void machine__delete_threads(struct machine *machine);
163 void machine__delete(struct machine *machine);
164 void machine__remove_thread(struct machine *machine, struct thread *th);
165 
166 struct branch_info *sample__resolve_bstack(struct perf_sample *sample,
167                                            struct addr_location *al);
168 struct mem_info *sample__resolve_mem(struct perf_sample *sample,
169                                      struct addr_location *al);
170 
171 struct callchain_cursor;
172 
173 int thread__resolve_callchain(struct thread *thread,
174                               struct callchain_cursor *cursor,
175                               struct perf_evsel *evsel,
176                               struct perf_sample *sample,
177                               struct symbol **parent,
178                               struct addr_location *root_al,
179                               int max_stack);
180 
181 /*
182  * Default guest kernel is defined by parameter --guestkallsyms
183  * and --guestmodules
184  */
185 static inline bool machine__is_default_guest(struct machine *machine)
186 {
187         return machine ? machine->pid == DEFAULT_GUEST_KERNEL_ID : false;
188 }
189 
190 static inline bool machine__is_host(struct machine *machine)
191 {
192         return machine ? machine->pid == HOST_KERNEL_ID : false;
193 }
194 
195 bool machine__is(struct machine *machine, const char *arch);
196 int machine__nr_cpus_avail(struct machine *machine);
197 
198 struct thread *__machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid);
199 struct thread *machine__findnew_thread(struct machine *machine, pid_t pid, pid_t tid);
200 
201 struct dso *machine__findnew_dso(struct machine *machine, const char *filename);
202 
203 size_t machine__fprintf(struct machine *machine, FILE *fp);
204 
205 static inline
206 struct symbol *machine__find_kernel_symbol(struct machine *machine, u64 addr,
207                                            struct map **mapp)
208 {
209         return map_groups__find_symbol(&machine->kmaps, addr, mapp);
210 }
211 
212 static inline
213 struct symbol *machine__find_kernel_symbol_by_name(struct machine *machine,
214                                                    const char *name,
215                                                    struct map **mapp)
216 {
217         return map_groups__find_symbol_by_name(&machine->kmaps, name, mapp);
218 }
219 
220 struct map *machine__findnew_module_map(struct machine *machine, u64 start,
221                                         const char *filename);
222 int arch__fix_module_text_start(u64 *start, const char *name);
223 
224 int machine__load_kallsyms(struct machine *machine, const char *filename);
225 
226 int machine__load_vmlinux_path(struct machine *machine);
227 
228 size_t machine__fprintf_dsos_buildid(struct machine *machine, FILE *fp,
229                                      bool (skip)(struct dso *dso, int parm), int parm);
230 size_t machines__fprintf_dsos(struct machines *machines, FILE *fp);
231 size_t machines__fprintf_dsos_buildid(struct machines *machines, FILE *fp,
232                                      bool (skip)(struct dso *dso, int parm), int parm);
233 
234 void machine__destroy_kernel_maps(struct machine *machine);
235 int machine__create_kernel_maps(struct machine *machine);
236 
237 int machines__create_kernel_maps(struct machines *machines, pid_t pid);
238 int machines__create_guest_kernel_maps(struct machines *machines);
239 void machines__destroy_kernel_maps(struct machines *machines);
240 
241 size_t machine__fprintf_vmlinux_path(struct machine *machine, FILE *fp);
242 
243 int machine__for_each_thread(struct machine *machine,
244                              int (*fn)(struct thread *thread, void *p),
245                              void *priv);
246 int machines__for_each_thread(struct machines *machines,
247                               int (*fn)(struct thread *thread, void *p),
248                               void *priv);
249 
250 int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
251                                   struct target *target, struct thread_map *threads,
252                                   perf_event__handler_t process, bool data_mmap,
253                                   unsigned int nr_threads_synthesize);
254 static inline
255 int machine__synthesize_threads(struct machine *machine, struct target *target,
256                                 struct thread_map *threads, bool data_mmap,
257                                 unsigned int nr_threads_synthesize)
258 {
259         return __machine__synthesize_threads(machine, NULL, target, threads,
260                                              perf_event__process, data_mmap,
261                                              nr_threads_synthesize);
262 }
263 
264 pid_t machine__get_current_tid(struct machine *machine, int cpu);
265 int machine__set_current_tid(struct machine *machine, int cpu, pid_t pid,
266                              pid_t tid);
267 /*
268  * For use with libtraceevent's tep_set_function_resolver()
269  */
270 char *machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp);
271 
272 void machine__get_kallsyms_filename(struct machine *machine, char *buf,
273                                     size_t bufsz);
274 
275 int machine__create_extra_kernel_maps(struct machine *machine,
276                                       struct dso *kernel);
277 
278 /* Kernel-space maps for symbols that are outside the main kernel map and module maps */
279 struct extra_kernel_map {
280         u64 start;
281         u64 end;
282         u64 pgoff;
283         char name[KMAP_NAME_LEN];
284 };
285 
286 int machine__create_extra_kernel_map(struct machine *machine,
287                                      struct dso *kernel,
288                                      struct extra_kernel_map *xm);
289 
290 int machine__map_x86_64_entry_trampolines(struct machine *machine,
291                                           struct dso *kernel);
292 
293 #endif /* __PERF_MACHINE_H */
294 

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