#include "perf.h"
#include "tests.h"
#include "debug.h"
#include "symbol.h"
#include "sort.h"
#include "evsel.h"
#include "evlist.h"
#include "machine.h"
#include "thread.h"
#include "parse-events.h"
static struct {
u32 pid;
const char *comm;
} fake_threads[] = {
{ 100, "perf" },
{ 200, "perf" },
{ 300, "bash" },
};
static struct {
u32 pid;
u64 start;
const char *filename;
} fake_mmap_info[] = {
{ 100, 0x40000, "perf" },
{ 100, 0x50000, "libc" },
{ 100, 0xf0000, "[kernel]" },
{ 200, 0x40000, "perf" },
{ 200, 0x50000, "libc" },
{ 200, 0xf0000, "[kernel]" },
{ 300, 0x40000, "bash" },
{ 300, 0x50000, "libc" },
{ 300, 0xf0000, "[kernel]" },
};
struct fake_sym {
u64 start;
u64 length;
const char *name;
};
static struct fake_sym perf_syms[] = {
{ 700, 100, "main" },
{ 800, 100, "run_command" },
{ 900, 100, "cmd_record" },
};
static struct fake_sym bash_syms[] = {
{ 700, 100, "main" },
{ 800, 100, "xmalloc" },
{ 900, 100, "xfree" },
};
static struct fake_sym libc_syms[] = {
{ 700, 100, "malloc" },
{ 800, 100, "free" },
{ 900, 100, "realloc" },
};
static struct fake_sym kernel_syms[] = {
{ 700, 100, "schedule" },
{ 800, 100, "page_fault" },
{ 900, 100, "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) },
};
static 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);
if (thread == NULL)
goto out;
thread__set_comm(thread, fake_threads[i].comm);
}
for (i = 0; i < ARRAY_SIZE(fake_mmap_info); i++) {
union perf_event fake_mmap_event = {
.mmap = {
.header = { .misc = PERF_RECORD_MISC_USER, },
.pid = fake_mmap_info[i].pid,
.start = fake_mmap_info[i].start,
.len = 0x1000ULL,
.pgoff = 0ULL,
},
};
strcpy(fake_mmap_event.mmap.filename,
fake_mmap_info[i].filename);
machine__process_mmap_event(machine, &fake_mmap_event);
}
for (i = 0; i < ARRAY_SIZE(fake_symbols); i++) {
size_t k;
struct dso *dso;
dso = __dsos__findnew(&machine->user_dsos,
fake_symbols[i].dso_name);
if (dso == NULL)
goto out;
/* emulate dso__load() */
dso__set_loaded(dso, MAP__FUNCTION);
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, fsym->name);
if (sym == NULL)
goto out;
symbols__insert(&dso->symbols[MAP__FUNCTION], sym);
}
}
return machine;
out:
pr_debug("Not enough memory for machine setup\n");
machine__delete_threads(machine);
machine__delete(machine);
return NULL;
}
struct sample {
u32 pid;
u64 ip;
struct thread *thread;
struct map *map;
struct symbol *sym;
};
static struct sample fake_common_samples[] = {
/* perf [kernel] schedule() */
{ .pid = 100, .ip = 0xf0000 + 700, },
/* perf [perf] main() */
{ .pid = 200, .ip = 0x40000 + 700, },
/* perf [perf] cmd_record() */
{ .pid = 200, .ip = 0x40000 + 900, },
/* bash [bash] xmalloc() */
{ .pid = 300, .ip = 0x40000 + 800, },
/* bash [libc] malloc() */
{ .pid = 300, .ip = 0x50000 + 700, },
};
static struct sample fake_samples[][5] = {
{
/* perf [perf] run_command() */
{ .pid = 100, .ip = 0x40000 + 800, },
/* perf [libc] malloc() */
{ .pid = 100, .ip = 0x50000 + 700, },
/* perf [kernel] page_fault() */
{ .pid = 100, .ip = 0xf0000 + 800, },
/* perf [kernel] sys_perf_event_open() */
{ .pid = 200, .ip = 0xf0000 + 900, },
/* bash [libc] free() */
{ .pid = 300, .ip = 0x50000 + 800, },
},
{
/* perf [libc] free() */
{ .pid = 200, .ip = 0x50000 + 800, },
/* bash [libc] malloc() */
{ .pid = 300, .ip = 0x50000 + 700, }, /* will be merged */
/* bash [bash] xfee() */
{ .pid = 300, .ip = 0x40000 + 900, },
/* bash [libc] realloc() */
{ .pid = 300, .ip = 0x50000 + 900, },
/* bash [kernel] page_fault() */
{ .pid = 300, .ip = 0xf0000 + 800, },
},
};
static int add_hist_entries(struct perf_evlist *evlist, struct machine *machine)
{
struct perf_evsel *evsel;
struct addr_location al;
struct hist_entry *he;
struct perf_sample sample = { .cpu = 0, };
size_t i = 0, k;
/*
* each evsel will have 10 samples - 5 common and 5 distinct.
* However the second evsel also has a collapsed entry for
* "bash [libc] malloc" so total 9 entries will be in the tree.
*/
list_for_each_entry(evsel, &evlist->entries, node) {
for (k = 0; k < ARRAY_SIZE(fake_common_samples); k++) {
const union perf_event event = {
.ip = {
.header = {
.misc = PERF_RECORD_MISC_USER,
},
.pid = fake_common_samples[k].pid,
.ip = fake_common_samples[k].ip,
},
};
if (perf_event__preprocess_sample(&event, machine, &al,
&sample, 0) < 0)
goto out;
he = __hists__add_entry(&evsel->hists, &al, NULL, 1);
if (he == NULL)
goto out;
fake_common_samples[k].thread = al.thread;
fake_common_samples[k].map = al.map;
fake_common_samples[k].sym = al.sym;
}
for (k = 0; k < ARRAY_SIZE(fake_samples[i]); k++) {
const union perf_event event = {
.ip = {
.header = {
.misc = PERF_RECORD_MISC_USER,
},
.pid = fake_samples[i][k].pid,
.ip = fake_samples[i][k].ip,
},
};
if (perf_event__preprocess_sample(&event, machine, &al,
&sample, 0) < 0)
goto out;
he = __hists__add_entry(&evsel->hists, &al, NULL, 1);
if (he == NULL)
goto out;
fake_samples[i][k].thread = al.thread;
fake_samples[i][k].map = al.map;
fake_samples[i][k].sym = al.sym;
}
i++;
}
return 0;
out:
pr_debug("Not enough memory for adding a hist entry\n");
return -1;
}
static int find_sample(struct sample *samples, size_t nr_samples,
struct thread *t, struct map *m, struct symbol *s)
{
while (nr_samples--) {
if (samples->thread == t && samples->map == m &&
samples->sym == s)
return 1;
samples++;
}
return 0;
}
static int __validate_match(struct hists *hists)
{
size_t count = 0;
struct rb_root *root;
struct rb_node *node;
/*
* Only entries from fake_common_samples should have a pair.
*/
if (sort__need_collapse)
root = &hists->entries_collapsed;
else
root = hists->entries_in;
node = rb_first(root);
while (node) {
struct hist_entry *he;
he = rb_entry(node, struct hist_entry, rb_node_in);
if (hist_entry__has_pairs(he)) {
if (find_sample(fake_common_samples,
ARRAY_SIZE(fake_common_samples),
he->thread, he->ms.map, he->ms.sym)) {
count++;
} else {
pr_debug("Can't find the matched entry\n");
return -1;
}
}
node = rb_next(node);
}
if (count != ARRAY_SIZE(fake_common_samples)) {
pr_debug("Invalid count for matched entries: %zd of %zd\n",
count, ARRAY_SIZE(fake_common_samples));
return -1;
}
return 0;
}
static int validate_match(struct hists *leader, struct hists *other)
{
return __validate_match(leader) || __validate_match(other);
}
static int __validate_link(struct hists *hists, int idx)
{
size_t count = 0;
size_t count_pair = 0;
size_t count_dummy = 0;
struct rb_root *root;
struct rb_node *node;
/*
* Leader hists (idx = 0) will have dummy entries from other,
* and some entries will have no pair. However every entry
* in other hists should have (dummy) pair.
*/
if (sort__need_collapse)
root = &hists->entries_collapsed;
else
root = hists->entries_in;
node = rb_first(root);
while (node) {
struct hist_entry *he;
he = rb_entry(node, struct hist_entry, rb_node_in);
if (hist_entry__has_pairs(he)) {
if (!find_sample(fake_common_samples,
ARRAY_SIZE(fake_common_samples),
he->thread, he->ms.map, he->ms.sym) &&
!find_sample(fake_samples[idx],
ARRAY_SIZE(fake_samples[idx]),
he->thread, he->ms.map, he->ms.sym)) {
count_dummy++;
}
count_pair++;
} else if (idx) {
pr_debug("A entry from the other hists should have pair\n");
return -1;
}
count++;
node = rb_next(node);
}
/*
* Note that we have a entry collapsed in the other (idx = 1) hists.
*/
if (idx == 0) {
if (count_dummy != ARRAY_SIZE(fake_samples[1]) - 1) {
pr_debug("Invalid count of dummy entries: %zd of %zd\n",
count_dummy, ARRAY_SIZE(fake_samples[1]) - 1);
return -1;
}
if (count != count_pair + ARRAY_SIZE(fake_samples[0])) {
pr_debug("Invalid count of total leader entries: %zd of %zd\n",
count, count_pair + ARRAY_SIZE(fake_samples[0]));
return -1;
}
} else {
if (count != count_pair) {
pr_debug("Invalid count of total other entries: %zd of %zd\n",
count, count_pair);
return -1;
}
if (count_dummy > 0) {
pr_debug("Other hists should not have dummy entries: %zd\n",
count_dummy);
return -1;
}
}
return 0;
}
static int validate_link(struct hists *leader, struct hists *other)
{
return __validate_link(leader, 0) || __validate_link(other, 1);
}
static void print_hists(struct hists *hists)
{
int i = 0;
struct rb_root *root;
struct rb_node *node;
if (sort__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);
pr_info("%2d: entry: %-8s [%-8s] %20s: period = %"PRIu64"\n",
i, he->thread->comm, he->ms.map->dso->short_name,
he->ms.sym->name, he->stat.period);
i++;
node = rb_next(node);
}
}
int test__hists_link(void)
{
int err = -1;
struct machines machines;
struct machine *machine = NULL;
struct perf_evsel *evsel, *first;
struct perf_evlist *evlist = perf_evlist__new();
if (evlist == NULL)
return -ENOMEM;
err = parse_events(evlist, "cpu-clock");
if (err)
goto out;
err = parse_events(evlist, "task-clock");
if (err)
goto out;
/* default sort order (comm,dso,sym) will be used */
if (setup_sorting() < 0)
goto out;
machines__init(&machines);
/* setup threads/dso/map/symbols also */
machine = setup_fake_machine(&machines);
if (!machine)
goto out;
if (verbose > 1)
machine__fprintf(machine, stderr);
/* process sample events */
err = add_hist_entries(evlist, machine);
if (err < 0)
goto out;
list_for_each_entry(evsel, &evlist->entries, node) {
hists__collapse_resort(&evsel->hists);
if (verbose > 2)
print_hists(&evsel->hists);
}
first = perf_evlist__first(evlist);
evsel = perf_evlist__last(evlist);
/* match common entries */
hists__match(&first->hists, &evsel->hists);
err = validate_match(&first->hists, &evsel->hists);
if (err)
goto out;
/* link common and/or dummy entries */
hists__link(&first->hists, &evsel->hists);
err = validate_link(&first->hists, &evsel->hists);
if (err)
goto out;
err = 0;
out:
/* tear down everything */
perf_evlist__delete(evlist);
machines__exit(&machines);
return err;
}
