hists_common.c

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// SPDX-License-Identifier: GPL-2.0
#include <inttypes.h>
#include "perf.h"
#include "util/debug.h"
#include "util/symbol.h"
#include "util/sort.h"
#include "util/evsel.h"
#include "util/evlist.h"
#include "util/machine.h"
#include "util/thread.h"
#include "tests/hists_common.h"
#include <linux/kernel.h>

static struct {
    u32 pid;
    const char *comm;
} fake_threads[] = {
    { FAKE_PID_PERF1, "perf" },
    { FAKE_PID_PERF2, "perf" },
    { FAKE_PID_BASH,  "bash" },
};

static struct {
    u32 pid;
    u64 start;
    const char *filename;
} fake_mmap_info[] = {
    { FAKE_PID_PERF1, FAKE_MAP_PERF,   "perf" },
    { FAKE_PID_PERF1, FAKE_MAP_LIBC,   "libc" },
    { FAKE_PID_PERF1, FAKE_MAP_KERNEL, "[kernel]" },
    { FAKE_PID_PERF2, FAKE_MAP_PERF,   "perf" },
    { FAKE_PID_PERF2, FAKE_MAP_LIBC,   "libc" },
    { FAKE_PID_PERF2, FAKE_MAP_KERNEL, "[kernel]" },
    { FAKE_PID_BASH,  FAKE_MAP_BASH,   "bash" },
    { FAKE_PID_BASH,  FAKE_MAP_LIBC,   "libc" },
    { FAKE_PID_BASH,  FAKE_MAP_KERNEL, "[kernel]" },
};

struct fake_sym {
    u64 start;
    u64 length;
    const char *name;
};

static struct fake_sym perf_syms[] = {
    { FAKE_SYM_OFFSET1, FAKE_SYM_LENGTH, "main" },
    { FAKE_SYM_OFFSET2, FAKE_SYM_LENGTH, "run_command" },
    { FAKE_SYM_OFFSET3, FAKE_SYM_LENGTH, "cmd_record" },
};

static struct fake_sym bash_syms[] = {
    { FAKE_SYM_OFFSET1, FAKE_SYM_LENGTH, "main" },
    { FAKE_SYM_OFFSET2, FAKE_SYM_LENGTH, "xmalloc" },
    { FAKE_SYM_OFFSET3, FAKE_SYM_LENGTH, "xfree" },
};

static struct fake_sym libc_syms[] = {
    { 700, 100, "malloc" },
    { 800, 100, "free" },
    { 900, 100, "realloc" },
    { FAKE_SYM_OFFSET1, FAKE_SYM_LENGTH, "malloc" },
    { FAKE_SYM_OFFSET2, FAKE_SYM_LENGTH, "free" },
    { FAKE_SYM_OFFSET3, FAKE_SYM_LENGTH, "realloc" },
};

static struct fake_sym kernel_syms[] = {
    { FAKE_SYM_OFFSET1, FAKE_SYM_LENGTH, "schedule" },
    { FAKE_SYM_OFFSET2, FAKE_SYM_LENGTH, "page_fault" },
    { FAKE_SYM_OFFSET3, FAKE_SYM_LENGTH, "sys_perf_event_open" },
};

static struct {
    const char *dso_name;
    struct fake_sym *syms;
    size_t nr_syms;
} fake_symbols[] = {
    { "perf", perf_syms, ARRAY_SIZE(perf_syms) },
    { "bash", bash_syms, ARRAY_SIZE(bash_syms) },
    { "libc", libc_syms, ARRAY_SIZE(libc_syms) },
    { "[kernel]", kernel_syms, ARRAY_SIZE(kernel_syms) },
};

struct machine *setup_fake_machine(struct machines *machines)
{
    struct machine *machine = machines__find(machines, HOST_KERNEL_ID);
    size_t i;

    if (machine == NULL) {
        pr_debug("Not enough memory for machine setup\n");
        return NULL;
    }

    for (i = 0; i < ARRAY_SIZE(fake_threads); i++) {
        struct thread *thread;

        thread = machine__findnew_thread(machine, fake_threads[i].pid,
                         fake_threads[i].pid);
        if (thread == NULL)
            goto out;

        thread__set_comm(thread, fake_threads[i].comm, 0);
        thread__put(thread);
    }

    for (i = 0; i < ARRAY_SIZE(fake_mmap_info); i++) {
        struct perf_sample sample = {
            .cpumode = PERF_RECORD_MISC_USER,
        };
        union perf_event fake_mmap_event = {
            .mmap = {
                .pid = fake_mmap_info[i].pid,
                .tid = fake_mmap_info[i].pid,
                .start = fake_mmap_info[i].start,
                .len = FAKE_MAP_LENGTH,
                .pgoff = 0ULL,
            },
        };

        strcpy(fake_mmap_event.mmap.filename,
               fake_mmap_info[i].filename);

        machine__process_mmap_event(machine, &fake_mmap_event, &sample);
    }

    for (i = 0; i < ARRAY_SIZE(fake_symbols); i++) {
        size_t k;
        struct dso *dso;

        dso = machine__findnew_dso(machine, fake_symbols[i].dso_name);
        if (dso == NULL)
            goto out;

        /* emulate dso__load() */
        dso__set_loaded(dso);

        for (k = 0; k < fake_symbols[i].nr_syms; k++) {
            struct symbol *sym;
            struct fake_sym *fsym = &fake_symbols[i].syms[k];

            sym = symbol__new(fsym->start, fsym->length,
                      STB_GLOBAL, STT_FUNC, fsym->name);
            if (sym == NULL) {
                dso__put(dso);
                goto out;
            }

            symbols__insert(&dso->symbols, sym);
        }

        dso__put(dso);
    }

    return machine;

out:
    pr_debug("Not enough memory for machine setup\n");
    machine__delete_threads(machine);
    return NULL;
}

void print_hists_in(struct hists *hists)
{
    int i = 0;
    struct rb_root *root;
    struct rb_node *node;

    if (hists__has(hists, need_collapse))
        root = &hists->entries_collapsed;
    else
        root = hists->entries_in;

    pr_info("----- %s --------\n", __func__);
    node = rb_first(root);
    while (node) {
        struct hist_entry *he;

        he = rb_entry(node, struct hist_entry, rb_node_in);

        if (!he->filtered) {
            pr_info("%2d: entry: %-8s [%-8s] %20s: period = %"PRIu64"\n",
                i, thread__comm_str(he->thread),
                he->ms.map->dso->short_name,
                he->ms.sym->name, he->stat.period);
        }

        i++;
        node = rb_next(node);
    }
}

void print_hists_out(struct hists *hists)
{
    int i = 0;
    struct rb_root *root;
    struct rb_node *node;

    root = &hists->entries;

    pr_info("----- %s --------\n", __func__);
    node = rb_first(root);
    while (node) {
        struct hist_entry *he;

        he = rb_entry(node, struct hist_entry, rb_node);

        if (!he->filtered) {
            pr_info("%2d: entry: %8s:%5d [%-8s] %20s: period = %"PRIu64"/%"PRIu64"\n",
                i, thread__comm_str(he->thread), he->thread->tid,
                he->ms.map->dso->short_name,
                he->ms.sym->name, he->stat.period,
                he->stat_acc ? he->stat_acc->period : 0);
        }

        i++;
        node = rb_next(node);
    }
}