tools/perf/util/env.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include "cpumap.h"
   3 #include "debug.h"
   4 #include "env.h"
   5 #include <linux/ctype.h>
   6 #include <linux/zalloc.h>
   7 #include "bpf-event.h"
   8 #include <errno.h>
   9 #include <sys/utsname.h>
  10 #include <bpf/libbpf.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13
  14 struct perf_env perf_env;
  15
  16 void perf_env__insert_bpf_prog_info(struct perf_env *env,
  17                                     struct bpf_prog_info_node *info_node)
  18 {
  19         __u32 prog_id = info_node->info_linear->info.id;
  20         struct bpf_prog_info_node *node;
  21         struct rb_node *parent = NULL;
  22         struct rb_node **p;
  23
  24         down_write(&env->bpf_progs.lock);
  25         p = &env->bpf_progs.infos.rb_node;
  26
  27         while (*p != NULL) {
  28                 parent = *p;
  29                 node = rb_entry(parent, struct bpf_prog_info_node, rb_node);
  30                 if (prog_id < node->info_linear->info.id) {
  31                         p = &(*p)->rb_left;
  32                 } else if (prog_id > node->info_linear->info.id) {
  33                         p = &(*p)->rb_right;
  34                 } else {
  35                         pr_debug("duplicated bpf prog info %u\n", prog_id);
  36                         goto out;
  37                 }
  38         }
  39
  40         rb_link_node(&info_node->rb_node, parent, p);
  41         rb_insert_color(&info_node->rb_node, &env->bpf_progs.infos);
  42         env->bpf_progs.infos_cnt++;
  43 out:
  44         up_write(&env->bpf_progs.lock);
  45 }
  46
  47 struct bpf_prog_info_node *perf_env__find_bpf_prog_info(struct perf_env *env,
  48                                                         __u32 prog_id)
  49 {
  50         struct bpf_prog_info_node *node = NULL;
  51         struct rb_node *n;
  52
  53         down_read(&env->bpf_progs.lock);
  54         n = env->bpf_progs.infos.rb_node;
  55
  56         while (n) {
  57                 node = rb_entry(n, struct bpf_prog_info_node, rb_node);
  58                 if (prog_id < node->info_linear->info.id)
  59                         n = n->rb_left;
  60                 else if (prog_id > node->info_linear->info.id)
  61                         n = n->rb_right;
  62                 else
  63                         goto out;
  64         }
  65         node = NULL;
  66
  67 out:
  68         up_read(&env->bpf_progs.lock);
  69         return node;
  70 }
  71
  72 void perf_env__insert_btf(struct perf_env *env, struct btf_node *btf_node)
  73 {
  74         struct rb_node *parent = NULL;
  75         __u32 btf_id = btf_node->id;
  76         struct btf_node *node;
  77         struct rb_node **p;
  78
  79         down_write(&env->bpf_progs.lock);
  80         p = &env->bpf_progs.btfs.rb_node;
  81
  82         while (*p != NULL) {
  83                 parent = *p;
  84                 node = rb_entry(parent, struct btf_node, rb_node);
  85                 if (btf_id < node->id) {
  86                         p = &(*p)->rb_left;
  87                 } else if (btf_id > node->id) {
  88                         p = &(*p)->rb_right;
  89                 } else {
  90                         pr_debug("duplicated btf %u\n", btf_id);
  91                         goto out;
  92                 }
  93         }
  94
  95         rb_link_node(&btf_node->rb_node, parent, p);
  96         rb_insert_color(&btf_node->rb_node, &env->bpf_progs.btfs);
  97         env->bpf_progs.btfs_cnt++;
  98 out:
  99         up_write(&env->bpf_progs.lock);
 100 }
 101
 102 struct btf_node *perf_env__find_btf(struct perf_env *env, __u32 btf_id)
 103 {
 104         struct btf_node *node = NULL;
 105         struct rb_node *n;
 106
 107         down_read(&env->bpf_progs.lock);
 108         n = env->bpf_progs.btfs.rb_node;
 109
 110         while (n) {
 111                 node = rb_entry(n, struct btf_node, rb_node);
 112                 if (btf_id < node->id)
 113                         n = n->rb_left;
 114                 else if (btf_id > node->id)
 115                         n = n->rb_right;
 116                 else
 117                         goto out;
 118         }
 119         node = NULL;
 120
 121 out:
 122         up_read(&env->bpf_progs.lock);
 123         return node;
 124 }
 125
 126 /* purge data in bpf_progs.infos tree */
 127 static void perf_env__purge_bpf(struct perf_env *env)
 128 {
 129         struct rb_root *root;
 130         struct rb_node *next;
 131
 132         down_write(&env->bpf_progs.lock);
 133
 134         root = &env->bpf_progs.infos;
 135         next = rb_first(root);
 136
 137         while (next) {
 138                 struct bpf_prog_info_node *node;
 139
 140                 node = rb_entry(next, struct bpf_prog_info_node, rb_node);
 141                 next = rb_next(&node->rb_node);
 142                 rb_erase(&node->rb_node, root);
 143                 free(node);
 144         }
 145
 146         env->bpf_progs.infos_cnt = 0;
 147
 148         root = &env->bpf_progs.btfs;
 149         next = rb_first(root);
 150
 151         while (next) {
 152                 struct btf_node *node;
 153
 154                 node = rb_entry(next, struct btf_node, rb_node);
 155                 next = rb_next(&node->rb_node);
 156                 rb_erase(&node->rb_node, root);
 157                 free(node);
 158         }
 159
 160         env->bpf_progs.btfs_cnt = 0;
 161
 162         up_write(&env->bpf_progs.lock);
 163 }
 164
 165 void perf_env__exit(struct perf_env *env)
 166 {
 167         int i;
 168
 169         perf_env__purge_bpf(env);
 170         zfree(&env->hostname);
 171         zfree(&env->os_release);
 172         zfree(&env->version);
 173         zfree(&env->arch);
 174         zfree(&env->cpu_desc);
 175         zfree(&env->cpuid);
 176         zfree(&env->cmdline);
 177         zfree(&env->cmdline_argv);
 178         zfree(&env->sibling_cores);
 179         zfree(&env->sibling_threads);
 180         zfree(&env->pmu_mappings);
 181         zfree(&env->cpu);
 182
 183         for (i = 0; i < env->nr_numa_nodes; i++)
 184                 perf_cpu_map__put(env->numa_nodes[i].map);
 185         zfree(&env->numa_nodes);
 186
 187         for (i = 0; i < env->caches_cnt; i++)
 188                 cpu_cache_level__free(&env->caches[i]);
 189         zfree(&env->caches);
 190
 191         for (i = 0; i < env->nr_memory_nodes; i++)
 192                 zfree(&env->memory_nodes[i].set);
 193         zfree(&env->memory_nodes);
 194 }
 195
 196 void perf_env__init(struct perf_env *env)
 197 {
 198         env->bpf_progs.infos = RB_ROOT;
 199         env->bpf_progs.btfs = RB_ROOT;
 200         init_rwsem(&env->bpf_progs.lock);
 201 }
 202
 203 int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[])
 204 {
 205         int i;
 206
 207         /* do not include NULL termination */
 208         env->cmdline_argv = calloc(argc, sizeof(char *));
 209         if (env->cmdline_argv == NULL)
 210                 goto out_enomem;
 211
 212         /*
 213          * Must copy argv contents because it gets moved around during option
 214          * parsing:
 215          */
 216         for (i = 0; i < argc ; i++) {
 217                 env->cmdline_argv[i] = argv[i];
 218                 if (env->cmdline_argv[i] == NULL)
 219                         goto out_free;
 220         }
 221
 222         env->nr_cmdline = argc;
 223
 224         return 0;
 225 out_free:
 226         zfree(&env->cmdline_argv);
 227 out_enomem:
 228         return -ENOMEM;
 229 }
 230
 231 int perf_env__read_cpu_topology_map(struct perf_env *env)
 232 {
 233         int cpu, nr_cpus;
 234
 235         if (env->cpu != NULL)
 236                 return 0;
 237
 238         if (env->nr_cpus_avail == 0)
 239                 env->nr_cpus_avail = cpu__max_present_cpu();
 240
 241         nr_cpus = env->nr_cpus_avail;
 242         if (nr_cpus == -1)
 243                 return -EINVAL;
 244
 245         env->cpu = calloc(nr_cpus, sizeof(env->cpu[0]));
 246         if (env->cpu == NULL)
 247                 return -ENOMEM;
 248
 249         for (cpu = 0; cpu < nr_cpus; ++cpu) {
 250                 env->cpu[cpu].core_id   = cpu_map__get_core_id(cpu);
 251                 env->cpu[cpu].socket_id = cpu_map__get_socket_id(cpu);
 252                 env->cpu[cpu].die_id    = cpu_map__get_die_id(cpu);
 253         }
 254
 255         env->nr_cpus_avail = nr_cpus;
 256         return 0;
 257 }
 258
 259 static int perf_env__read_arch(struct perf_env *env)
 260 {
 261         struct utsname uts;
 262
 263         if (env->arch)
 264                 return 0;
 265
 266         if (!uname(&uts))
 267                 env->arch = strdup(uts.machine);
 268
 269         return env->arch ? 0 : -ENOMEM;
 270 }
 271
 272 static int perf_env__read_nr_cpus_avail(struct perf_env *env)
 273 {
 274         if (env->nr_cpus_avail == 0)
 275                 env->nr_cpus_avail = cpu__max_present_cpu();
 276
 277         return env->nr_cpus_avail ? 0 : -ENOENT;
 278 }
 279
 280 const char *perf_env__raw_arch(struct perf_env *env)
 281 {
 282         return env && !perf_env__read_arch(env) ? env->arch : "unknown";
 283 }
 284
 285 int perf_env__nr_cpus_avail(struct perf_env *env)
 286 {
 287         return env && !perf_env__read_nr_cpus_avail(env) ? env->nr_cpus_avail : 0;
 288 }
 289
 290 void cpu_cache_level__free(struct cpu_cache_level *cache)
 291 {
 292         zfree(&cache->type);
 293         zfree(&cache->map);
 294         zfree(&cache->size);
 295 }
 296
 297 /*
 298  * Return architecture name in a normalized form.
 299  * The conversion logic comes from the Makefile.
 300  */
 301 static const char *normalize_arch(char *arch)
 302 {
 303         if (!strcmp(arch, "x86_64"))
 304                 return "x86";
 305         if (arch[0] == 'i' && arch[2] == '8' && arch[3] == '6')
 306                 return "x86";
 307         if (!strcmp(arch, "sun4u") || !strncmp(arch, "sparc", 5))
 308                 return "sparc";
 309         if (!strcmp(arch, "aarch64") || !strcmp(arch, "arm64"))
 310                 return "arm64";
 311         if (!strncmp(arch, "arm", 3) || !strcmp(arch, "sa110"))
 312                 return "arm";
 313         if (!strncmp(arch, "s390", 4))
 314                 return "s390";
 315         if (!strncmp(arch, "parisc", 6))
 316                 return "parisc";
 317         if (!strncmp(arch, "powerpc", 7) || !strncmp(arch, "ppc", 3))
 318                 return "powerpc";
 319         if (!strncmp(arch, "mips", 4))
 320                 return "mips";
 321         if (!strncmp(arch, "sh", 2) && isdigit(arch[2]))
 322                 return "sh";
 323
 324         return arch;
 325 }
 326
 327 const char *perf_env__arch(struct perf_env *env)
 328 {
 329         struct utsname uts;
 330         char *arch_name;
 331
 332         if (!env || !env->arch) { /* Assume local operation */
 333                 if (uname(&uts) < 0)
 334                         return NULL;
 335                 arch_name = uts.machine;
 336         } else
 337                 arch_name = env->arch;
 338
 339         return normalize_arch(arch_name);
 340 }