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 <linux/zalloc.h>
   6 #include "bpf-event.h"
   7 #include <errno.h>
   8 #include <sys/utsname.h>
   9 #include <bpf/libbpf.h>
  10 #include <stdlib.h>
  11
  12 struct perf_env perf_env;
  13
  14 void perf_env__insert_bpf_prog_info(struct perf_env *env,
  15                                     struct bpf_prog_info_node *info_node)
  16 {
  17         __u32 prog_id = info_node->info_linear->info.id;
  18         struct bpf_prog_info_node *node;
  19         struct rb_node *parent = NULL;
  20         struct rb_node **p;
  21
  22         down_write(&env->bpf_progs.lock);
  23         p = &env->bpf_progs.infos.rb_node;
  24
  25         while (*p != NULL) {
  26                 parent = *p;
  27                 node = rb_entry(parent, struct bpf_prog_info_node, rb_node);
  28                 if (prog_id < node->info_linear->info.id) {
  29                         p = &(*p)->rb_left;
  30                 } else if (prog_id > node->info_linear->info.id) {
  31                         p = &(*p)->rb_right;
  32                 } else {
  33                         pr_debug("duplicated bpf prog info %u\n", prog_id);
  34                         goto out;
  35                 }
  36         }
  37
  38         rb_link_node(&info_node->rb_node, parent, p);
  39         rb_insert_color(&info_node->rb_node, &env->bpf_progs.infos);
  40         env->bpf_progs.infos_cnt++;
  41 out:
  42         up_write(&env->bpf_progs.lock);
  43 }
  44
  45 struct bpf_prog_info_node *perf_env__find_bpf_prog_info(struct perf_env *env,
  46                                                         __u32 prog_id)
  47 {
  48         struct bpf_prog_info_node *node = NULL;
  49         struct rb_node *n;
  50
  51         down_read(&env->bpf_progs.lock);
  52         n = env->bpf_progs.infos.rb_node;
  53
  54         while (n) {
  55                 node = rb_entry(n, struct bpf_prog_info_node, rb_node);
  56                 if (prog_id < node->info_linear->info.id)
  57                         n = n->rb_left;
  58                 else if (prog_id > node->info_linear->info.id)
  59                         n = n->rb_right;
  60                 else
  61                         goto out;
  62         }
  63         node = NULL;
  64
  65 out:
  66         up_read(&env->bpf_progs.lock);
  67         return node;
  68 }
  69
  70 void perf_env__insert_btf(struct perf_env *env, struct btf_node *btf_node)
  71 {
  72         struct rb_node *parent = NULL;
  73         __u32 btf_id = btf_node->id;
  74         struct btf_node *node;
  75         struct rb_node **p;
  76
  77         down_write(&env->bpf_progs.lock);
  78         p = &env->bpf_progs.btfs.rb_node;
  79
  80         while (*p != NULL) {
  81                 parent = *p;
  82                 node = rb_entry(parent, struct btf_node, rb_node);
  83                 if (btf_id < node->id) {
  84                         p = &(*p)->rb_left;
  85                 } else if (btf_id > node->id) {
  86                         p = &(*p)->rb_right;
  87                 } else {
  88                         pr_debug("duplicated btf %u\n", btf_id);
  89                         goto out;
  90                 }
  91         }
  92
  93         rb_link_node(&btf_node->rb_node, parent, p);
  94         rb_insert_color(&btf_node->rb_node, &env->bpf_progs.btfs);
  95         env->bpf_progs.btfs_cnt++;
  96 out:
  97         up_write(&env->bpf_progs.lock);
  98 }
  99
 100 struct btf_node *perf_env__find_btf(struct perf_env *env, __u32 btf_id)
 101 {
 102         struct btf_node *node = NULL;
 103         struct rb_node *n;
 104
 105         down_read(&env->bpf_progs.lock);
 106         n = env->bpf_progs.btfs.rb_node;
 107
 108         while (n) {
 109                 node = rb_entry(n, struct btf_node, rb_node);
 110                 if (btf_id < node->id)
 111                         n = n->rb_left;
 112                 else if (btf_id > node->id)
 113                         n = n->rb_right;
 114                 else
 115                         goto out;
 116         }
 117         node = NULL;
 118
 119 out:
 120         up_read(&env->bpf_progs.lock);
 121         return node;
 122 }
 123
 124 /* purge data in bpf_progs.infos tree */
 125 static void perf_env__purge_bpf(struct perf_env *env)
 126 {
 127         struct rb_root *root;
 128         struct rb_node *next;
 129
 130         down_write(&env->bpf_progs.lock);
 131
 132         root = &env->bpf_progs.infos;
 133         next = rb_first(root);
 134
 135         while (next) {
 136                 struct bpf_prog_info_node *node;
 137
 138                 node = rb_entry(next, struct bpf_prog_info_node, rb_node);
 139                 next = rb_next(&node->rb_node);
 140                 rb_erase(&node->rb_node, root);
 141                 free(node);
 142         }
 143
 144         env->bpf_progs.infos_cnt = 0;
 145
 146         root = &env->bpf_progs.btfs;
 147         next = rb_first(root);
 148
 149         while (next) {
 150                 struct btf_node *node;
 151
 152                 node = rb_entry(next, struct btf_node, rb_node);
 153                 next = rb_next(&node->rb_node);
 154                 rb_erase(&node->rb_node, root);
 155                 free(node);
 156         }
 157
 158         env->bpf_progs.btfs_cnt = 0;
 159
 160         up_write(&env->bpf_progs.lock);
 161 }
 162
 163 void perf_env__exit(struct perf_env *env)
 164 {
 165         int i;
 166
 167         perf_env__purge_bpf(env);
 168         zfree(&env->hostname);
 169         zfree(&env->os_release);
 170         zfree(&env->version);
 171         zfree(&env->arch);
 172         zfree(&env->cpu_desc);
 173         zfree(&env->cpuid);
 174         zfree(&env->cmdline);
 175         zfree(&env->cmdline_argv);
 176         zfree(&env->sibling_cores);
 177         zfree(&env->sibling_threads);
 178         zfree(&env->pmu_mappings);
 179         zfree(&env->cpu);
 180
 181         for (i = 0; i < env->nr_numa_nodes; i++)
 182                 cpu_map__put(env->numa_nodes[i].map);
 183         zfree(&env->numa_nodes);
 184
 185         for (i = 0; i < env->caches_cnt; i++)
 186                 cpu_cache_level__free(&env->caches[i]);
 187         zfree(&env->caches);
 188
 189         for (i = 0; i < env->nr_memory_nodes; i++)
 190                 zfree(&env->memory_nodes[i].set);
 191         zfree(&env->memory_nodes);
 192 }
 193
 194 void perf_env__init(struct perf_env *env)
 195 {
 196         env->bpf_progs.infos = RB_ROOT;
 197         env->bpf_progs.btfs = RB_ROOT;
 198         init_rwsem(&env->bpf_progs.lock);
 199 }
 200
 201 int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[])
 202 {
 203         int i;
 204
 205         /* do not include NULL termination */
 206         env->cmdline_argv = calloc(argc, sizeof(char *));
 207         if (env->cmdline_argv == NULL)
 208                 goto out_enomem;
 209
 210         /*
 211          * Must copy argv contents because it gets moved around during option
 212          * parsing:
 213          */
 214         for (i = 0; i < argc ; i++) {
 215                 env->cmdline_argv[i] = argv[i];
 216                 if (env->cmdline_argv[i] == NULL)
 217                         goto out_free;
 218         }
 219
 220         env->nr_cmdline = argc;
 221
 222         return 0;
 223 out_free:
 224         zfree(&env->cmdline_argv);
 225 out_enomem:
 226         return -ENOMEM;
 227 }
 228
 229 int perf_env__read_cpu_topology_map(struct perf_env *env)
 230 {
 231         int cpu, nr_cpus;
 232
 233         if (env->cpu != NULL)
 234                 return 0;
 235
 236         if (env->nr_cpus_avail == 0)
 237                 env->nr_cpus_avail = cpu__max_present_cpu();
 238
 239         nr_cpus = env->nr_cpus_avail;
 240         if (nr_cpus == -1)
 241                 return -EINVAL;
 242
 243         env->cpu = calloc(nr_cpus, sizeof(env->cpu[0]));
 244         if (env->cpu == NULL)
 245                 return -ENOMEM;
 246
 247         for (cpu = 0; cpu < nr_cpus; ++cpu) {
 248                 env->cpu[cpu].core_id   = cpu_map__get_core_id(cpu);
 249                 env->cpu[cpu].socket_id = cpu_map__get_socket_id(cpu);
 250                 env->cpu[cpu].die_id    = cpu_map__get_die_id(cpu);
 251         }
 252
 253         env->nr_cpus_avail = nr_cpus;
 254         return 0;
 255 }
 256
 257 static int perf_env__read_arch(struct perf_env *env)
 258 {
 259         struct utsname uts;
 260
 261         if (env->arch)
 262                 return 0;
 263
 264         if (!uname(&uts))
 265                 env->arch = strdup(uts.machine);
 266
 267         return env->arch ? 0 : -ENOMEM;
 268 }
 269
 270 static int perf_env__read_nr_cpus_avail(struct perf_env *env)
 271 {
 272         if (env->nr_cpus_avail == 0)
 273                 env->nr_cpus_avail = cpu__max_present_cpu();
 274
 275         return env->nr_cpus_avail ? 0 : -ENOENT;
 276 }
 277
 278 const char *perf_env__raw_arch(struct perf_env *env)
 279 {
 280         return env && !perf_env__read_arch(env) ? env->arch : "unknown";
 281 }
 282
 283 int perf_env__nr_cpus_avail(struct perf_env *env)
 284 {
 285         return env && !perf_env__read_nr_cpus_avail(env) ? env->nr_cpus_avail : 0;
 286 }
 287
 288 void cpu_cache_level__free(struct cpu_cache_level *cache)
 289 {
 290         zfree(&cache->type);
 291         zfree(&cache->map);
 292         zfree(&cache->size);
 293 }
 294
 295 /*
 296  * Return architecture name in a normalized form.
 297  * The conversion logic comes from the Makefile.
 298  */
 299 static const char *normalize_arch(char *arch)
 300 {
 301         if (!strcmp(arch, "x86_64"))
 302                 return "x86";
 303         if (arch[0] == 'i' && arch[2] == '8' && arch[3] == '6')
 304                 return "x86";
 305         if (!strcmp(arch, "sun4u") || !strncmp(arch, "sparc", 5))
 306                 return "sparc";
 307         if (!strcmp(arch, "aarch64") || !strcmp(arch, "arm64"))
 308                 return "arm64";
 309         if (!strncmp(arch, "arm", 3) || !strcmp(arch, "sa110"))
 310                 return "arm";
 311         if (!strncmp(arch, "s390", 4))
 312                 return "s390";
 313         if (!strncmp(arch, "parisc", 6))
 314                 return "parisc";
 315         if (!strncmp(arch, "powerpc", 7) || !strncmp(arch, "ppc", 3))
 316                 return "powerpc";
 317         if (!strncmp(arch, "mips", 4))
 318                 return "mips";
 319         if (!strncmp(arch, "sh", 2) && isdigit(arch[2]))
 320                 return "sh";
 321
 322         return arch;
 323 }
 324
 325 const char *perf_env__arch(struct perf_env *env)
 326 {
 327         struct utsname uts;
 328         char *arch_name;
 329
 330         if (!env || !env->arch) { /* Assume local operation */
 331                 if (uname(&uts) < 0)
 332                         return NULL;
 333                 arch_name = uts.machine;
 334         } else
 335                 arch_name = env->arch;
 336
 337         return normalize_arch(arch_name);
 338 }