tools/perf/util/machine.h

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