tools/perf/tests/hists_common.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <inttypes.h>
   3 #include "util/debug.h"
   4 #include "util/dso.h"
   5 #include "util/event.h" // struct perf_sample
   6 #include "util/map.h"
   7 #include "util/symbol.h"
   8 #include "util/sort.h"
   9 #include "util/evsel.h"
  10 #include "util/machine.h"
  11 #include "util/thread.h"
  12 #include "tests/hists_common.h"
  13 #include <linux/kernel.h>
  14 #include <linux/perf_event.h>
  15
  16 static struct {
  17         u32 pid;
  18         const char *comm;
  19 } fake_threads[] = {
  20         { FAKE_PID_PERF1, "perf" },
  21         { FAKE_PID_PERF2, "perf" },
  22         { FAKE_PID_BASH,  "bash" },
  23 };
  24
  25 static struct {
  26         u32 pid;
  27         u64 start;
  28         const char *filename;
  29 } fake_mmap_info[] = {
  30         { FAKE_PID_PERF1, FAKE_MAP_PERF,   "perf" },
  31         { FAKE_PID_PERF1, FAKE_MAP_LIBC,   "libc" },
  32         { FAKE_PID_PERF1, FAKE_MAP_KERNEL, "[kernel]" },
  33         { FAKE_PID_PERF2, FAKE_MAP_PERF,   "perf" },
  34         { FAKE_PID_PERF2, FAKE_MAP_LIBC,   "libc" },
  35         { FAKE_PID_PERF2, FAKE_MAP_KERNEL, "[kernel]" },
  36         { FAKE_PID_BASH,  FAKE_MAP_BASH,   "bash" },
  37         { FAKE_PID_BASH,  FAKE_MAP_LIBC,   "libc" },
  38         { FAKE_PID_BASH,  FAKE_MAP_KERNEL, "[kernel]" },
  39 };
  40
  41 struct fake_sym {
  42         u64 start;
  43         u64 length;
  44         const char *name;
  45 };
  46
  47 static struct fake_sym perf_syms[] = {
  48         { FAKE_SYM_OFFSET1, FAKE_SYM_LENGTH, "main" },
  49         { FAKE_SYM_OFFSET2, FAKE_SYM_LENGTH, "run_command" },
  50         { FAKE_SYM_OFFSET3, FAKE_SYM_LENGTH, "cmd_record" },
  51 };
  52
  53 static struct fake_sym bash_syms[] = {
  54         { FAKE_SYM_OFFSET1, FAKE_SYM_LENGTH, "main" },
  55         { FAKE_SYM_OFFSET2, FAKE_SYM_LENGTH, "xmalloc" },
  56         { FAKE_SYM_OFFSET3, FAKE_SYM_LENGTH, "xfree" },
  57 };
  58
  59 static struct fake_sym libc_syms[] = {
  60         { 700, 100, "malloc" },
  61         { 800, 100, "free" },
  62         { 900, 100, "realloc" },
  63         { FAKE_SYM_OFFSET1, FAKE_SYM_LENGTH, "malloc" },
  64         { FAKE_SYM_OFFSET2, FAKE_SYM_LENGTH, "free" },
  65         { FAKE_SYM_OFFSET3, FAKE_SYM_LENGTH, "realloc" },
  66 };
  67
  68 static struct fake_sym kernel_syms[] = {
  69         { FAKE_SYM_OFFSET1, FAKE_SYM_LENGTH, "schedule" },
  70         { FAKE_SYM_OFFSET2, FAKE_SYM_LENGTH, "page_fault" },
  71         { FAKE_SYM_OFFSET3, FAKE_SYM_LENGTH, "sys_perf_event_open" },
  72 };
  73
  74 static struct {
  75         const char *dso_name;
  76         struct fake_sym *syms;
  77         size_t nr_syms;
  78 } fake_symbols[] = {
  79         { "perf", perf_syms, ARRAY_SIZE(perf_syms) },
  80         { "bash", bash_syms, ARRAY_SIZE(bash_syms) },
  81         { "libc", libc_syms, ARRAY_SIZE(libc_syms) },
  82         { "[kernel]", kernel_syms, ARRAY_SIZE(kernel_syms) },
  83 };
  84
  85 struct machine *setup_fake_machine(struct machines *machines)
  86 {
  87         struct machine *machine = machines__find(machines, HOST_KERNEL_ID);
  88         size_t i;
  89
  90         if (machine == NULL) {
  91                 pr_debug("Not enough memory for machine setup\n");
  92                 return NULL;
  93         }
  94
  95         for (i = 0; i < ARRAY_SIZE(fake_threads); i++) {
  96                 struct thread *thread;
  97
  98                 thread = machine__findnew_thread(machine, fake_threads[i].pid,
  99                                                  fake_threads[i].pid);
 100                 if (thread == NULL)
 101                         goto out;
 102
 103                 thread__set_comm(thread, fake_threads[i].comm, 0);
 104                 thread__put(thread);
 105         }
 106
 107         for (i = 0; i < ARRAY_SIZE(fake_mmap_info); i++) {
 108                 struct perf_sample sample = {
 109                         .cpumode = PERF_RECORD_MISC_USER,
 110                 };
 111                 union perf_event fake_mmap_event = {
 112                         .mmap = {
 113                                 .pid = fake_mmap_info[i].pid,
 114                                 .tid = fake_mmap_info[i].pid,
 115                                 .start = fake_mmap_info[i].start,
 116                                 .len = FAKE_MAP_LENGTH,
 117                                 .pgoff = 0ULL,
 118                         },
 119                 };
 120
 121                 strcpy(fake_mmap_event.mmap.filename,
 122                        fake_mmap_info[i].filename);
 123
 124                 machine__process_mmap_event(machine, &fake_mmap_event, &sample);
 125         }
 126
 127         for (i = 0; i < ARRAY_SIZE(fake_symbols); i++) {
 128                 size_t k;
 129                 struct dso *dso;
 130
 131                 dso = machine__findnew_dso(machine, fake_symbols[i].dso_name);
 132                 if (dso == NULL)
 133                         goto out;
 134
 135                 /* emulate dso__load() */
 136                 dso__set_loaded(dso);
 137
 138                 for (k = 0; k < fake_symbols[i].nr_syms; k++) {
 139                         struct symbol *sym;
 140                         struct fake_sym *fsym = &fake_symbols[i].syms[k];
 141
 142                         sym = symbol__new(fsym->start, fsym->length,
 143                                           STB_GLOBAL, STT_FUNC, fsym->name);
 144                         if (sym == NULL) {
 145                                 dso__put(dso);
 146                                 goto out;
 147                         }
 148
 149                         symbols__insert(&dso->symbols, sym);
 150                 }
 151
 152                 dso__put(dso);
 153         }
 154
 155         return machine;
 156
 157 out:
 158         pr_debug("Not enough memory for machine setup\n");
 159         machine__delete_threads(machine);
 160         return NULL;
 161 }
 162
 163 void print_hists_in(struct hists *hists)
 164 {
 165         int i = 0;
 166         struct rb_root_cached *root;
 167         struct rb_node *node;
 168
 169         if (hists__has(hists, need_collapse))
 170                 root = &hists->entries_collapsed;
 171         else
 172                 root = hists->entries_in;
 173
 174         pr_info("----- %s --------\n", __func__);
 175         node = rb_first_cached(root);
 176         while (node) {
 177                 struct hist_entry *he;
 178
 179                 he = rb_entry(node, struct hist_entry, rb_node_in);
 180
 181                 if (!he->filtered) {
 182                         pr_info("%2d: entry: %-8s [%-8s] %20s: period = %"PRIu64"\n",
 183                                 i, thread__comm_str(he->thread),
 184                                 he->ms.map->dso->short_name,
 185                                 he->ms.sym->name, he->stat.period);
 186                 }
 187
 188                 i++;
 189                 node = rb_next(node);
 190         }
 191 }
 192
 193 void print_hists_out(struct hists *hists)
 194 {
 195         int i = 0;
 196         struct rb_root_cached *root;
 197         struct rb_node *node;
 198
 199         root = &hists->entries;
 200
 201         pr_info("----- %s --------\n", __func__);
 202         node = rb_first_cached(root);
 203         while (node) {
 204                 struct hist_entry *he;
 205
 206                 he = rb_entry(node, struct hist_entry, rb_node);
 207
 208                 if (!he->filtered) {
 209                         pr_info("%2d: entry: %8s:%5d [%-8s] %20s: period = %"PRIu64"/%"PRIu64"\n",
 210                                 i, thread__comm_str(he->thread), he->thread->tid,
 211                                 he->ms.map->dso->short_name,
 212                                 he->ms.sym->name, he->stat.period,
 213                                 he->stat_acc ? he->stat_acc->period : 0);
 214                 }
 215
 216                 i++;
 217                 node = rb_next(node);
 218         }
 219 }