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-rw-r--r--tools/perf/util/env.c595
1 files changed, 595 insertions, 0 deletions
diff --git a/tools/perf/util/env.c b/tools/perf/util/env.c
new file mode 100644
index 000000000..5d878bae7
--- /dev/null
+++ b/tools/perf/util/env.c
@@ -0,0 +1,595 @@
+// SPDX-License-Identifier: GPL-2.0
+#include "cpumap.h"
+#include "debug.h"
+#include "env.h"
+#include "util/header.h"
+#include <linux/ctype.h>
+#include <linux/zalloc.h>
+#include "cgroup.h"
+#include <errno.h>
+#include <sys/utsname.h>
+#include <stdlib.h>
+#include <string.h>
+#include "strbuf.h"
+
+struct perf_env perf_env;
+
+#ifdef HAVE_LIBBPF_SUPPORT
+#include "bpf-event.h"
+#include "bpf-utils.h"
+#include <bpf/libbpf.h>
+
+void perf_env__insert_bpf_prog_info(struct perf_env *env,
+ struct bpf_prog_info_node *info_node)
+{
+ down_write(&env->bpf_progs.lock);
+ __perf_env__insert_bpf_prog_info(env, info_node);
+ up_write(&env->bpf_progs.lock);
+}
+
+void __perf_env__insert_bpf_prog_info(struct perf_env *env, struct bpf_prog_info_node *info_node)
+{
+ __u32 prog_id = info_node->info_linear->info.id;
+ struct bpf_prog_info_node *node;
+ struct rb_node *parent = NULL;
+ struct rb_node **p;
+
+ p = &env->bpf_progs.infos.rb_node;
+
+ while (*p != NULL) {
+ parent = *p;
+ node = rb_entry(parent, struct bpf_prog_info_node, rb_node);
+ if (prog_id < node->info_linear->info.id) {
+ p = &(*p)->rb_left;
+ } else if (prog_id > node->info_linear->info.id) {
+ p = &(*p)->rb_right;
+ } else {
+ pr_debug("duplicated bpf prog info %u\n", prog_id);
+ return;
+ }
+ }
+
+ rb_link_node(&info_node->rb_node, parent, p);
+ rb_insert_color(&info_node->rb_node, &env->bpf_progs.infos);
+ env->bpf_progs.infos_cnt++;
+}
+
+struct bpf_prog_info_node *perf_env__find_bpf_prog_info(struct perf_env *env,
+ __u32 prog_id)
+{
+ struct bpf_prog_info_node *node = NULL;
+ struct rb_node *n;
+
+ down_read(&env->bpf_progs.lock);
+ n = env->bpf_progs.infos.rb_node;
+
+ while (n) {
+ node = rb_entry(n, struct bpf_prog_info_node, rb_node);
+ if (prog_id < node->info_linear->info.id)
+ n = n->rb_left;
+ else if (prog_id > node->info_linear->info.id)
+ n = n->rb_right;
+ else
+ goto out;
+ }
+ node = NULL;
+
+out:
+ up_read(&env->bpf_progs.lock);
+ return node;
+}
+
+bool perf_env__insert_btf(struct perf_env *env, struct btf_node *btf_node)
+{
+ bool ret;
+
+ down_write(&env->bpf_progs.lock);
+ ret = __perf_env__insert_btf(env, btf_node);
+ up_write(&env->bpf_progs.lock);
+ return ret;
+}
+
+bool __perf_env__insert_btf(struct perf_env *env, struct btf_node *btf_node)
+{
+ struct rb_node *parent = NULL;
+ __u32 btf_id = btf_node->id;
+ struct btf_node *node;
+ struct rb_node **p;
+
+ p = &env->bpf_progs.btfs.rb_node;
+
+ while (*p != NULL) {
+ parent = *p;
+ node = rb_entry(parent, struct btf_node, rb_node);
+ if (btf_id < node->id) {
+ p = &(*p)->rb_left;
+ } else if (btf_id > node->id) {
+ p = &(*p)->rb_right;
+ } else {
+ pr_debug("duplicated btf %u\n", btf_id);
+ return false;
+ }
+ }
+
+ rb_link_node(&btf_node->rb_node, parent, p);
+ rb_insert_color(&btf_node->rb_node, &env->bpf_progs.btfs);
+ env->bpf_progs.btfs_cnt++;
+ return true;
+}
+
+struct btf_node *perf_env__find_btf(struct perf_env *env, __u32 btf_id)
+{
+ struct btf_node *res;
+
+ down_read(&env->bpf_progs.lock);
+ res = __perf_env__find_btf(env, btf_id);
+ up_read(&env->bpf_progs.lock);
+ return res;
+}
+
+struct btf_node *__perf_env__find_btf(struct perf_env *env, __u32 btf_id)
+{
+ struct btf_node *node = NULL;
+ struct rb_node *n;
+
+ n = env->bpf_progs.btfs.rb_node;
+
+ while (n) {
+ node = rb_entry(n, struct btf_node, rb_node);
+ if (btf_id < node->id)
+ n = n->rb_left;
+ else if (btf_id > node->id)
+ n = n->rb_right;
+ else
+ return node;
+ }
+ return NULL;
+}
+
+/* purge data in bpf_progs.infos tree */
+static void perf_env__purge_bpf(struct perf_env *env)
+{
+ struct rb_root *root;
+ struct rb_node *next;
+
+ down_write(&env->bpf_progs.lock);
+
+ root = &env->bpf_progs.infos;
+ next = rb_first(root);
+
+ while (next) {
+ struct bpf_prog_info_node *node;
+
+ node = rb_entry(next, struct bpf_prog_info_node, rb_node);
+ next = rb_next(&node->rb_node);
+ rb_erase(&node->rb_node, root);
+ free(node->info_linear);
+ free(node);
+ }
+
+ env->bpf_progs.infos_cnt = 0;
+
+ root = &env->bpf_progs.btfs;
+ next = rb_first(root);
+
+ while (next) {
+ struct btf_node *node;
+
+ node = rb_entry(next, struct btf_node, rb_node);
+ next = rb_next(&node->rb_node);
+ rb_erase(&node->rb_node, root);
+ free(node);
+ }
+
+ env->bpf_progs.btfs_cnt = 0;
+
+ up_write(&env->bpf_progs.lock);
+}
+#else // HAVE_LIBBPF_SUPPORT
+static void perf_env__purge_bpf(struct perf_env *env __maybe_unused)
+{
+}
+#endif // HAVE_LIBBPF_SUPPORT
+
+void perf_env__exit(struct perf_env *env)
+{
+ int i, j;
+
+ perf_env__purge_bpf(env);
+ perf_env__purge_cgroups(env);
+ zfree(&env->hostname);
+ zfree(&env->os_release);
+ zfree(&env->version);
+ zfree(&env->arch);
+ zfree(&env->cpu_desc);
+ zfree(&env->cpuid);
+ zfree(&env->cmdline);
+ zfree(&env->cmdline_argv);
+ zfree(&env->sibling_dies);
+ zfree(&env->sibling_cores);
+ zfree(&env->sibling_threads);
+ zfree(&env->pmu_mappings);
+ zfree(&env->cpu);
+ for (i = 0; i < env->nr_cpu_pmu_caps; i++)
+ zfree(&env->cpu_pmu_caps[i]);
+ zfree(&env->cpu_pmu_caps);
+ zfree(&env->numa_map);
+
+ for (i = 0; i < env->nr_numa_nodes; i++)
+ perf_cpu_map__put(env->numa_nodes[i].map);
+ zfree(&env->numa_nodes);
+
+ for (i = 0; i < env->caches_cnt; i++)
+ cpu_cache_level__free(&env->caches[i]);
+ zfree(&env->caches);
+
+ for (i = 0; i < env->nr_memory_nodes; i++)
+ zfree(&env->memory_nodes[i].set);
+ zfree(&env->memory_nodes);
+
+ for (i = 0; i < env->nr_hybrid_nodes; i++) {
+ zfree(&env->hybrid_nodes[i].pmu_name);
+ zfree(&env->hybrid_nodes[i].cpus);
+ }
+ zfree(&env->hybrid_nodes);
+
+ for (i = 0; i < env->nr_pmus_with_caps; i++) {
+ for (j = 0; j < env->pmu_caps[i].nr_caps; j++)
+ zfree(&env->pmu_caps[i].caps[j]);
+ zfree(&env->pmu_caps[i].caps);
+ zfree(&env->pmu_caps[i].pmu_name);
+ }
+ zfree(&env->pmu_caps);
+}
+
+void perf_env__init(struct perf_env *env)
+{
+#ifdef HAVE_LIBBPF_SUPPORT
+ env->bpf_progs.infos = RB_ROOT;
+ env->bpf_progs.btfs = RB_ROOT;
+ init_rwsem(&env->bpf_progs.lock);
+#endif
+ env->kernel_is_64_bit = -1;
+}
+
+static void perf_env__init_kernel_mode(struct perf_env *env)
+{
+ const char *arch = perf_env__raw_arch(env);
+
+ if (!strncmp(arch, "x86_64", 6) || !strncmp(arch, "aarch64", 7) ||
+ !strncmp(arch, "arm64", 5) || !strncmp(arch, "mips64", 6) ||
+ !strncmp(arch, "parisc64", 8) || !strncmp(arch, "riscv64", 7) ||
+ !strncmp(arch, "s390x", 5) || !strncmp(arch, "sparc64", 7))
+ env->kernel_is_64_bit = 1;
+ else
+ env->kernel_is_64_bit = 0;
+}
+
+int perf_env__kernel_is_64_bit(struct perf_env *env)
+{
+ if (env->kernel_is_64_bit == -1)
+ perf_env__init_kernel_mode(env);
+
+ return env->kernel_is_64_bit;
+}
+
+int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[])
+{
+ int i;
+
+ /* do not include NULL termination */
+ env->cmdline_argv = calloc(argc, sizeof(char *));
+ if (env->cmdline_argv == NULL)
+ goto out_enomem;
+
+ /*
+ * Must copy argv contents because it gets moved around during option
+ * parsing:
+ */
+ for (i = 0; i < argc ; i++) {
+ env->cmdline_argv[i] = argv[i];
+ if (env->cmdline_argv[i] == NULL)
+ goto out_free;
+ }
+
+ env->nr_cmdline = argc;
+
+ return 0;
+out_free:
+ zfree(&env->cmdline_argv);
+out_enomem:
+ return -ENOMEM;
+}
+
+int perf_env__read_cpu_topology_map(struct perf_env *env)
+{
+ int idx, nr_cpus;
+
+ if (env->cpu != NULL)
+ return 0;
+
+ if (env->nr_cpus_avail == 0)
+ env->nr_cpus_avail = cpu__max_present_cpu().cpu;
+
+ nr_cpus = env->nr_cpus_avail;
+ if (nr_cpus == -1)
+ return -EINVAL;
+
+ env->cpu = calloc(nr_cpus, sizeof(env->cpu[0]));
+ if (env->cpu == NULL)
+ return -ENOMEM;
+
+ for (idx = 0; idx < nr_cpus; ++idx) {
+ struct perf_cpu cpu = { .cpu = idx };
+
+ env->cpu[idx].core_id = cpu__get_core_id(cpu);
+ env->cpu[idx].socket_id = cpu__get_socket_id(cpu);
+ env->cpu[idx].die_id = cpu__get_die_id(cpu);
+ }
+
+ env->nr_cpus_avail = nr_cpus;
+ return 0;
+}
+
+int perf_env__read_pmu_mappings(struct perf_env *env)
+{
+ struct perf_pmu *pmu = NULL;
+ u32 pmu_num = 0;
+ struct strbuf sb;
+
+ while ((pmu = perf_pmu__scan(pmu))) {
+ if (!pmu->name)
+ continue;
+ pmu_num++;
+ }
+ if (!pmu_num) {
+ pr_debug("pmu mappings not available\n");
+ return -ENOENT;
+ }
+ env->nr_pmu_mappings = pmu_num;
+
+ if (strbuf_init(&sb, 128 * pmu_num) < 0)
+ return -ENOMEM;
+
+ while ((pmu = perf_pmu__scan(pmu))) {
+ if (!pmu->name)
+ continue;
+ if (strbuf_addf(&sb, "%u:%s", pmu->type, pmu->name) < 0)
+ goto error;
+ /* include a NULL character at the end */
+ if (strbuf_add(&sb, "", 1) < 0)
+ goto error;
+ }
+
+ env->pmu_mappings = strbuf_detach(&sb, NULL);
+
+ return 0;
+
+error:
+ strbuf_release(&sb);
+ return -1;
+}
+
+int perf_env__read_cpuid(struct perf_env *env)
+{
+ char cpuid[128];
+ int err = get_cpuid(cpuid, sizeof(cpuid));
+
+ if (err)
+ return err;
+
+ free(env->cpuid);
+ env->cpuid = strdup(cpuid);
+ if (env->cpuid == NULL)
+ return ENOMEM;
+ return 0;
+}
+
+static int perf_env__read_arch(struct perf_env *env)
+{
+ struct utsname uts;
+
+ if (env->arch)
+ return 0;
+
+ if (!uname(&uts))
+ env->arch = strdup(uts.machine);
+
+ return env->arch ? 0 : -ENOMEM;
+}
+
+static int perf_env__read_nr_cpus_avail(struct perf_env *env)
+{
+ if (env->nr_cpus_avail == 0)
+ env->nr_cpus_avail = cpu__max_present_cpu().cpu;
+
+ return env->nr_cpus_avail ? 0 : -ENOENT;
+}
+
+const char *perf_env__raw_arch(struct perf_env *env)
+{
+ return env && !perf_env__read_arch(env) ? env->arch : "unknown";
+}
+
+int perf_env__nr_cpus_avail(struct perf_env *env)
+{
+ return env && !perf_env__read_nr_cpus_avail(env) ? env->nr_cpus_avail : 0;
+}
+
+void cpu_cache_level__free(struct cpu_cache_level *cache)
+{
+ zfree(&cache->type);
+ zfree(&cache->map);
+ zfree(&cache->size);
+}
+
+/*
+ * Return architecture name in a normalized form.
+ * The conversion logic comes from the Makefile.
+ */
+static const char *normalize_arch(char *arch)
+{
+ if (!strcmp(arch, "x86_64"))
+ return "x86";
+ if (arch[0] == 'i' && arch[2] == '8' && arch[3] == '6')
+ return "x86";
+ if (!strcmp(arch, "sun4u") || !strncmp(arch, "sparc", 5))
+ return "sparc";
+ if (!strncmp(arch, "aarch64", 7) || !strncmp(arch, "arm64", 5))
+ return "arm64";
+ if (!strncmp(arch, "arm", 3) || !strcmp(arch, "sa110"))
+ return "arm";
+ if (!strncmp(arch, "s390", 4))
+ return "s390";
+ if (!strncmp(arch, "parisc", 6))
+ return "parisc";
+ if (!strncmp(arch, "powerpc", 7) || !strncmp(arch, "ppc", 3))
+ return "powerpc";
+ if (!strncmp(arch, "mips", 4))
+ return "mips";
+ if (!strncmp(arch, "sh", 2) && isdigit(arch[2]))
+ return "sh";
+
+ return arch;
+}
+
+const char *perf_env__arch(struct perf_env *env)
+{
+ char *arch_name;
+
+ if (!env || !env->arch) { /* Assume local operation */
+ static struct utsname uts = { .machine[0] = '\0', };
+ if (uts.machine[0] == '\0' && uname(&uts) < 0)
+ return NULL;
+ arch_name = uts.machine;
+ } else
+ arch_name = env->arch;
+
+ return normalize_arch(arch_name);
+}
+
+const char *perf_env__cpuid(struct perf_env *env)
+{
+ int status;
+
+ if (!env || !env->cpuid) { /* Assume local operation */
+ status = perf_env__read_cpuid(env);
+ if (status)
+ return NULL;
+ }
+
+ return env->cpuid;
+}
+
+int perf_env__nr_pmu_mappings(struct perf_env *env)
+{
+ int status;
+
+ if (!env || !env->nr_pmu_mappings) { /* Assume local operation */
+ status = perf_env__read_pmu_mappings(env);
+ if (status)
+ return 0;
+ }
+
+ return env->nr_pmu_mappings;
+}
+
+const char *perf_env__pmu_mappings(struct perf_env *env)
+{
+ int status;
+
+ if (!env || !env->pmu_mappings) { /* Assume local operation */
+ status = perf_env__read_pmu_mappings(env);
+ if (status)
+ return NULL;
+ }
+
+ return env->pmu_mappings;
+}
+
+int perf_env__numa_node(struct perf_env *env, struct perf_cpu cpu)
+{
+ if (!env->nr_numa_map) {
+ struct numa_node *nn;
+ int i, nr = 0;
+
+ for (i = 0; i < env->nr_numa_nodes; i++) {
+ nn = &env->numa_nodes[i];
+ nr = max(nr, perf_cpu_map__max(nn->map).cpu);
+ }
+
+ nr++;
+
+ /*
+ * We initialize the numa_map array to prepare
+ * it for missing cpus, which return node -1
+ */
+ env->numa_map = malloc(nr * sizeof(int));
+ if (!env->numa_map)
+ return -1;
+
+ for (i = 0; i < nr; i++)
+ env->numa_map[i] = -1;
+
+ env->nr_numa_map = nr;
+
+ for (i = 0; i < env->nr_numa_nodes; i++) {
+ struct perf_cpu tmp;
+ int j;
+
+ nn = &env->numa_nodes[i];
+ perf_cpu_map__for_each_cpu(tmp, j, nn->map)
+ env->numa_map[tmp.cpu] = i;
+ }
+ }
+
+ return cpu.cpu >= 0 && cpu.cpu < env->nr_numa_map ? env->numa_map[cpu.cpu] : -1;
+}
+
+char *perf_env__find_pmu_cap(struct perf_env *env, const char *pmu_name,
+ const char *cap)
+{
+ char *cap_eq;
+ int cap_size;
+ char **ptr;
+ int i, j;
+
+ if (!pmu_name || !cap)
+ return NULL;
+
+ cap_size = strlen(cap);
+ cap_eq = zalloc(cap_size + 2);
+ if (!cap_eq)
+ return NULL;
+
+ memcpy(cap_eq, cap, cap_size);
+ cap_eq[cap_size] = '=';
+
+ if (!strcmp(pmu_name, "cpu")) {
+ for (i = 0; i < env->nr_cpu_pmu_caps; i++) {
+ if (!strncmp(env->cpu_pmu_caps[i], cap_eq, cap_size + 1)) {
+ free(cap_eq);
+ return &env->cpu_pmu_caps[i][cap_size + 1];
+ }
+ }
+ goto out;
+ }
+
+ for (i = 0; i < env->nr_pmus_with_caps; i++) {
+ if (strcmp(env->pmu_caps[i].pmu_name, pmu_name))
+ continue;
+
+ ptr = env->pmu_caps[i].caps;
+
+ for (j = 0; j < env->pmu_caps[i].nr_caps; j++) {
+ if (!strncmp(ptr[j], cap_eq, cap_size + 1)) {
+ free(cap_eq);
+ return &ptr[j][cap_size + 1];
+ }
+ }
+ }
+
+out:
+ free(cap_eq);
+ return NULL;
+}