tools/perf/util/env.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include "cpumap.h"
   3 #include "env.h"
   4 #include <linux/ctype.h>
   5 #include "util.h"
   6 #include "bpf-event.h"
   7 #include <errno.h>
   8 #include <sys/utsname.h>
   9 #include <bpf/libbpf.h>
  10
  11 struct perf_env perf_env;
  12
  13 void perf_env__insert_bpf_prog_info(struct perf_env *env,
  14                                     struct bpf_prog_info_node *info_node)
  15 {
  16         __u32 prog_id = info_node->info_linear->info.id;
  17         struct bpf_prog_info_node *node;
  18         struct rb_node *parent = NULL;
  19         struct rb_node **p;
  20
  21         down_write(&env->bpf_progs.lock);
  22         p = &env->bpf_progs.infos.rb_node;
  23
  24         while (*p != NULL) {
  25                 parent = *p;
  26                 node = rb_entry(parent, struct bpf_prog_info_node, rb_node);
  27                 if (prog_id < node->info_linear->info.id) {
  28                         p = &(*p)->rb_left;
  29                 } else if (prog_id > node->info_linear->info.id) {
  30                         p = &(*p)->rb_right;
  31                 } else {
  32                         pr_debug("duplicated bpf prog info %u\n", prog_id);
  33                         goto out;
  34                 }
  35         }
  36
  37         rb_link_node(&info_node->rb_node, parent, p);
  38         rb_insert_color(&info_node->rb_node, &env->bpf_progs.infos);
  39         env->bpf_progs.infos_cnt++;
  40 out:
  41         up_write(&env->bpf_progs.lock);
  42 }
  43
  44 struct bpf_prog_info_node *perf_env__find_bpf_prog_info(struct perf_env *env,
  45                                                         __u32 prog_id)
  46 {
  47         struct bpf_prog_info_node *node = NULL;
  48         struct rb_node *n;
  49
  50         down_read(&env->bpf_progs.lock);
  51         n = env->bpf_progs.infos.rb_node;
  52
  53         while (n) {
  54                 node = rb_entry(n, struct bpf_prog_info_node, rb_node);
  55                 if (prog_id < node->info_linear->info.id)
  56                         n = n->rb_left;
  57                 else if (prog_id > node->info_linear->info.id)
  58                         n = n->rb_right;
  59                 else
  60                         goto out;
  61         }
  62         node = NULL;
  63
  64 out:
  65         up_read(&env->bpf_progs.lock);
  66         return node;
  67 }
  68
  69 void perf_env__insert_btf(struct perf_env *env, struct btf_node *btf_node)
  70 {
  71         struct rb_node *parent = NULL;
  72         __u32 btf_id = btf_node->id;
  73         struct btf_node *node;
  74         struct rb_node **p;
  75
  76         down_write(&env->bpf_progs.lock);
  77         p = &env->bpf_progs.btfs.rb_node;
  78
  79         while (*p != NULL) {
  80                 parent = *p;
  81                 node = rb_entry(parent, struct btf_node, rb_node);
  82                 if (btf_id < node->id) {
  83                         p = &(*p)->rb_left;
  84                 } else if (btf_id > node->id) {
  85                         p = &(*p)->rb_right;
  86                 } else {
  87                         pr_debug("duplicated btf %u\n", btf_id);
  88                         goto out;
  89                 }
  90         }
  91
  92         rb_link_node(&btf_node->rb_node, parent, p);
  93         rb_insert_color(&btf_node->rb_node, &env->bpf_progs.btfs);
  94         env->bpf_progs.btfs_cnt++;
  95 out:
  96         up_write(&env->bpf_progs.lock);
  97 }
  98
  99 struct btf_node *perf_env__find_btf(struct perf_env *env, __u32 btf_id)
 100 {
 101         struct btf_node *node = NULL;
 102         struct rb_node *n;
 103
 104         down_read(&env->bpf_progs.lock);
 105         n = env->bpf_progs.btfs.rb_node;
 106
 107         while (n) {
 108                 node = rb_entry(n, struct btf_node, rb_node);
 109                 if (btf_id < node->id)
 110                         n = n->rb_left;
 111                 else if (btf_id > node->id)
 112                         n = n->rb_right;
 113                 else
 114                         goto out;
 115         }
 116         node = NULL;
 117
 118 out:
 119         up_read(&env->bpf_progs.lock);
 120         return node;
 121 }
 122
 123 /* purge data in bpf_progs.infos tree */
 124 static void perf_env__purge_bpf(struct perf_env *env)
 125 {
 126         struct rb_root *root;
 127         struct rb_node *next;
 128
 129         down_write(&env->bpf_progs.lock);
 130
 131         root = &env->bpf_progs.infos;
 132         next = rb_first(root);
 133
 134         while (next) {
 135                 struct bpf_prog_info_node *node;
 136
 137                 node = rb_entry(next, struct bpf_prog_info_node, rb_node);
 138                 next = rb_next(&node->rb_node);
 139                 rb_erase(&node->rb_node, root);
 140                 free(node);
 141         }
 142
 143         env->bpf_progs.infos_cnt = 0;
 144
 145         root = &env->bpf_progs.btfs;
 146         next = rb_first(root);
 147
 148         while (next) {
 149                 struct btf_node *node;
 150
 151                 node = rb_entry(next, struct btf_node, rb_node);
 152                 next = rb_next(&node->rb_node);
 153                 rb_erase(&node->rb_node, root);
 154                 free(node);
 155         }
 156
 157         env->bpf_progs.btfs_cnt = 0;
 158
 159         up_write(&env->bpf_progs.lock);
 160 }
 161
 162 void perf_env__exit(struct perf_env *env)
 163 {
 164         int i;
 165
 166         perf_env__purge_bpf(env);
 167         zfree(&env->hostname);
 168         zfree(&env->os_release);
 169         zfree(&env->version);
 170         zfree(&env->arch);
 171         zfree(&env->cpu_desc);
 172         zfree(&env->cpuid);
 173         zfree(&env->cmdline);
 174         zfree(&env->cmdline_argv);
 175         zfree(&env->sibling_cores);
 176         zfree(&env->sibling_threads);
 177         zfree(&env->pmu_mappings);
 178         zfree(&env->cpu);
 179
 180         for (i = 0; i < env->nr_numa_nodes; i++)
 181                 cpu_map__put(env->numa_nodes[i].map);
 182         zfree(&env->numa_nodes);
 183
 184         for (i = 0; i < env->caches_cnt; i++)
 185                 cpu_cache_level__free(&env->caches[i]);
 186         zfree(&env->caches);
 187
 188         for (i = 0; i < env->nr_memory_nodes; i++)
 189                 free(env->memory_nodes[i].set);
 190         zfree(&env->memory_nodes);
 191 }
 192
 193 void perf_env__init(struct perf_env *env)
 194 {
 195         env->bpf_progs.infos = RB_ROOT;
 196         env->bpf_progs.btfs = RB_ROOT;
 197         init_rwsem(&env->bpf_progs.lock);
 198 }
 199
 200 int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[])
 201 {
 202         int i;
 203
 204         /* do not include NULL termination */
 205         env->cmdline_argv = calloc(argc, sizeof(char *));
 206         if (env->cmdline_argv == NULL)
 207                 goto out_enomem;
 208
 209         /*
 210          * Must copy argv contents because it gets moved around during option
 211          * parsing:
 212          */
 213         for (i = 0; i < argc ; i++) {
 214                 env->cmdline_argv[i] = argv[i];
 215                 if (env->cmdline_argv[i] == NULL)
 216                         goto out_free;
 217         }
 218
 219         env->nr_cmdline = argc;
 220
 221         return 0;
 222 out_free:
 223         zfree(&env->cmdline_argv);
 224 out_enomem:
 225         return -ENOMEM;
 226 }
 227
 228 int perf_env__read_cpu_topology_map(struct perf_env *env)
 229 {
 230         int cpu, nr_cpus;
 231
 232         if (env->cpu != NULL)
 233                 return 0;
 234
 235         if (env->nr_cpus_avail == 0)
 236                 env->nr_cpus_avail = cpu__max_present_cpu();
 237
 238         nr_cpus = env->nr_cpus_avail;
 239         if (nr_cpus == -1)
 240                 return -EINVAL;
 241
 242         env->cpu = calloc(nr_cpus, sizeof(env->cpu[0]));
 243         if (env->cpu == NULL)
 244                 return -ENOMEM;
 245
 246         for (cpu = 0; cpu < nr_cpus; ++cpu) {
 247                 env->cpu[cpu].core_id   = cpu_map__get_core_id(cpu);
 248                 env->cpu[cpu].socket_id = cpu_map__get_socket_id(cpu);
 249                 env->cpu[cpu].die_id    = cpu_map__get_die_id(cpu);
 250         }
 251
 252         env->nr_cpus_avail = nr_cpus;
 253         return 0;
 254 }
 255
 256 static int perf_env__read_arch(struct perf_env *env)
 257 {
 258         struct utsname uts;
 259
 260         if (env->arch)
 261                 return 0;
 262
 263         if (!uname(&uts))
 264                 env->arch = strdup(uts.machine);
 265
 266         return env->arch ? 0 : -ENOMEM;
 267 }
 268
 269 static int perf_env__read_nr_cpus_avail(struct perf_env *env)
 270 {
 271         if (env->nr_cpus_avail == 0)
 272                 env->nr_cpus_avail = cpu__max_present_cpu();
 273
 274         return env->nr_cpus_avail ? 0 : -ENOENT;
 275 }
 276
 277 const char *perf_env__raw_arch(struct perf_env *env)
 278 {
 279         return env && !perf_env__read_arch(env) ? env->arch : "unknown";
 280 }
 281
 282 int perf_env__nr_cpus_avail(struct perf_env *env)
 283 {
 284         return env && !perf_env__read_nr_cpus_avail(env) ? env->nr_cpus_avail : 0;
 285 }
 286
 287 void cpu_cache_level__free(struct cpu_cache_level *cache)
 288 {
 289         free(cache->type);
 290         free(cache->map);
 291         free(cache->size);
 292 }
 293
 294 /*
 295  * Return architecture name in a normalized form.
 296  * The conversion logic comes from the Makefile.
 297  */
 298 static const char *normalize_arch(char *arch)
 299 {
 300         if (!strcmp(arch, "x86_64"))
 301                 return "x86";
 302         if (arch[0] == 'i' && arch[2] == '8' && arch[3] == '6')
 303                 return "x86";
 304         if (!strcmp(arch, "sun4u") || !strncmp(arch, "sparc", 5))
 305                 return "sparc";
 306         if (!strcmp(arch, "aarch64") || !strcmp(arch, "arm64"))
 307                 return "arm64";
 308         if (!strncmp(arch, "arm", 3) || !strcmp(arch, "sa110"))
 309                 return "arm";
 310         if (!strncmp(arch, "s390", 4))
 311                 return "s390";
 312         if (!strncmp(arch, "parisc", 6))
 313                 return "parisc";
 314         if (!strncmp(arch, "powerpc", 7) || !strncmp(arch, "ppc", 3))
 315                 return "powerpc";
 316         if (!strncmp(arch, "mips", 4))
 317                 return "mips";
 318         if (!strncmp(arch, "sh", 2) && isdigit(arch[2]))
 319                 return "sh";
 320
 321         return arch;
 322 }
 323
 324 const char *perf_env__arch(struct perf_env *env)
 325 {
 326         struct utsname uts;
 327         char *arch_name;
 328
 329         if (!env || !env->arch) { /* Assume local operation */
 330                 if (uname(&uts) < 0)
 331                         return NULL;
 332                 arch_name = uts.machine;
 333         } else
 334                 arch_name = env->arch;
 335
 336         return normalize_arch(arch_name);
 337 }