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mirror_ubuntu-kernels/tools/testing/selftests/bpf/veristat.c

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// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
/* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */
#define _GNU_SOURCE
#include <argp.h>
#include <string.h>
#include <stdlib.h>
#include <sched.h>
#include <pthread.h>
#include <dirent.h>
#include <signal.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/sysinfo.h>
#include <sys/stat.h>
#include <bpf/libbpf.h>
#include <bpf/btf.h>
#include <libelf.h>
#include <gelf.h>
#include <float.h>
#include <math.h>
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
#endif
enum stat_id {
VERDICT,
DURATION,
TOTAL_INSNS,
TOTAL_STATES,
PEAK_STATES,
MAX_STATES_PER_INSN,
MARK_READ_MAX_LEN,
FILE_NAME,
PROG_NAME,
ALL_STATS_CNT,
NUM_STATS_CNT = FILE_NAME - VERDICT,
};
/* In comparison mode each stat can specify up to four different values:
* - A side value;
* - B side value;
* - absolute diff value;
* - relative (percentage) diff value.
*
* When specifying stat specs in comparison mode, user can use one of the
* following variant suffixes to specify which exact variant should be used for
* ordering or filtering:
* - `_a` for A side value;
* - `_b` for B side value;
* - `_diff` for absolute diff value;
* - `_pct` for relative (percentage) diff value.
*
* If no variant suffix is provided, then `_b` (control data) is assumed.
*
* As an example, let's say instructions stat has the following output:
*
* Insns (A) Insns (B) Insns (DIFF)
* --------- --------- --------------
* 21547 20920 -627 (-2.91%)
*
* Then:
* - 21547 is A side value (insns_a);
* - 20920 is B side value (insns_b);
* - -627 is absolute diff value (insns_diff);
* - -2.91% is relative diff value (insns_pct).
*
* For verdict there is no verdict_pct variant.
* For file and program name, _a and _b variants are equivalent and there are
* no _diff or _pct variants.
*/
enum stat_variant {
VARIANT_A,
VARIANT_B,
VARIANT_DIFF,
VARIANT_PCT,
};
struct verif_stats {
char *file_name;
char *prog_name;
long stats[NUM_STATS_CNT];
};
/* joined comparison mode stats */
struct verif_stats_join {
char *file_name;
char *prog_name;
const struct verif_stats *stats_a;
const struct verif_stats *stats_b;
};
struct stat_specs {
int spec_cnt;
enum stat_id ids[ALL_STATS_CNT];
enum stat_variant variants[ALL_STATS_CNT];
bool asc[ALL_STATS_CNT];
bool abs[ALL_STATS_CNT];
int lens[ALL_STATS_CNT * 3]; /* 3x for comparison mode */
};
enum resfmt {
RESFMT_TABLE,
RESFMT_TABLE_CALCLEN, /* fake format to pre-calculate table's column widths */
RESFMT_CSV,
};
enum filter_kind {
FILTER_NAME,
FILTER_STAT,
};
enum operator_kind {
OP_EQ, /* == or = */
OP_NEQ, /* != or <> */
OP_LT, /* < */
OP_LE, /* <= */
OP_GT, /* > */
OP_GE, /* >= */
};
struct filter {
enum filter_kind kind;
/* FILTER_NAME */
char *any_glob;
char *file_glob;
char *prog_glob;
/* FILTER_STAT */
enum operator_kind op;
int stat_id;
enum stat_variant stat_var;
long value;
bool abs;
};
static struct env {
char **filenames;
int filename_cnt;
bool verbose;
bool debug;
bool quiet;
bool force_checkpoints;
bool force_reg_invariants;
enum resfmt out_fmt;
bool show_version;
bool comparison_mode;
bool replay_mode;
int top_n;
int log_level;
int log_size;
bool log_fixed;
struct verif_stats *prog_stats;
int prog_stat_cnt;
/* baseline_stats is allocated and used only in comparison mode */
struct verif_stats *baseline_stats;
int baseline_stat_cnt;
struct verif_stats_join *join_stats;
int join_stat_cnt;
struct stat_specs output_spec;
struct stat_specs sort_spec;
struct filter *allow_filters;
struct filter *deny_filters;
int allow_filter_cnt;
int deny_filter_cnt;
int files_processed;
int files_skipped;
int progs_processed;
int progs_skipped;
} env;
static int libbpf_print_fn(enum libbpf_print_level level, const char *format, va_list args)
{
if (!env.verbose)
return 0;
if (level == LIBBPF_DEBUG && !env.debug)
return 0;
return vfprintf(stderr, format, args);
}
#ifndef VERISTAT_VERSION
#define VERISTAT_VERSION "<kernel>"
#endif
const char *argp_program_version = "veristat v" VERISTAT_VERSION;
const char *argp_program_bug_address = "<bpf@vger.kernel.org>";
const char argp_program_doc[] =
"veristat BPF verifier stats collection and comparison tool.\n"
"\n"
"USAGE: veristat <obj-file> [<obj-file>...]\n"
" OR: veristat -C <baseline.csv> <comparison.csv>\n"
" OR: veristat -R <results.csv>\n";
enum {
OPT_LOG_FIXED = 1000,
OPT_LOG_SIZE = 1001,
};
static const struct argp_option opts[] = {
{ NULL, 'h', NULL, OPTION_HIDDEN, "Show the full help" },
{ "version", 'V', NULL, 0, "Print version" },
{ "verbose", 'v', NULL, 0, "Verbose mode" },
{ "debug", 'd', NULL, 0, "Debug mode (turns on libbpf debug logging)" },
{ "log-level", 'l', "LEVEL", 0, "Verifier log level (default 0 for normal mode, 1 for verbose mode)" },
{ "log-fixed", OPT_LOG_FIXED, NULL, 0, "Disable verifier log rotation" },
{ "log-size", OPT_LOG_SIZE, "BYTES", 0, "Customize verifier log size (default to 16MB)" },
{ "top-n", 'n', "N", 0, "Emit only up to first N results." },
{ "quiet", 'q', NULL, 0, "Quiet mode" },
{ "emit", 'e', "SPEC", 0, "Specify stats to be emitted" },
{ "sort", 's', "SPEC", 0, "Specify sort order" },
{ "output-format", 'o', "FMT", 0, "Result output format (table, csv), default is table." },
{ "compare", 'C', NULL, 0, "Comparison mode" },
{ "replay", 'R', NULL, 0, "Replay mode" },
{ "filter", 'f', "FILTER", 0, "Filter expressions (or @filename for file with expressions)." },
{ "test-states", 't', NULL, 0,
"Force frequent BPF verifier state checkpointing (set BPF_F_TEST_STATE_FREQ program flag)" },
{ "test-reg-invariants", 'r', NULL, 0,
"Force BPF verifier failure on register invariant violation (BPF_F_TEST_REG_INVARIANTS program flag)" },
{},
};
static int parse_stats(const char *stats_str, struct stat_specs *specs);
static int append_filter(struct filter **filters, int *cnt, const char *str);
static int append_filter_file(const char *path);
static error_t parse_arg(int key, char *arg, struct argp_state *state)
{
void *tmp;
int err;
switch (key) {
case 'h':
argp_state_help(state, stderr, ARGP_HELP_STD_HELP);
break;
case 'V':
env.show_version = true;
break;
case 'v':
env.verbose = true;
break;
case 'd':
env.debug = true;
env.verbose = true;
break;
case 'q':
env.quiet = true;
break;
case 'e':
err = parse_stats(arg, &env.output_spec);
if (err)
return err;
break;
case 's':
err = parse_stats(arg, &env.sort_spec);
if (err)
return err;
break;
case 'o':
if (strcmp(arg, "table") == 0) {
env.out_fmt = RESFMT_TABLE;
} else if (strcmp(arg, "csv") == 0) {
env.out_fmt = RESFMT_CSV;
} else {
fprintf(stderr, "Unrecognized output format '%s'\n", arg);
return -EINVAL;
}
break;
case 'l':
errno = 0;
env.log_level = strtol(arg, NULL, 10);
if (errno) {
fprintf(stderr, "invalid log level: %s\n", arg);
argp_usage(state);
}
break;
case OPT_LOG_FIXED:
env.log_fixed = true;
break;
case OPT_LOG_SIZE:
errno = 0;
env.log_size = strtol(arg, NULL, 10);
if (errno) {
fprintf(stderr, "invalid log size: %s\n", arg);
argp_usage(state);
}
break;
case 't':
env.force_checkpoints = true;
break;
case 'r':
env.force_reg_invariants = true;
break;
case 'n':
errno = 0;
env.top_n = strtol(arg, NULL, 10);
if (errno) {
fprintf(stderr, "invalid top N specifier: %s\n", arg);
argp_usage(state);
}
case 'C':
env.comparison_mode = true;
break;
case 'R':
env.replay_mode = true;
break;
case 'f':
if (arg[0] == '@')
err = append_filter_file(arg + 1);
else if (arg[0] == '!')
err = append_filter(&env.deny_filters, &env.deny_filter_cnt, arg + 1);
else
err = append_filter(&env.allow_filters, &env.allow_filter_cnt, arg);
if (err) {
fprintf(stderr, "Failed to collect program filter expressions: %d\n", err);
return err;
}
break;
case ARGP_KEY_ARG:
tmp = realloc(env.filenames, (env.filename_cnt + 1) * sizeof(*env.filenames));
if (!tmp)
return -ENOMEM;
env.filenames = tmp;
env.filenames[env.filename_cnt] = strdup(arg);
if (!env.filenames[env.filename_cnt])
return -ENOMEM;
env.filename_cnt++;
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static const struct argp argp = {
.options = opts,
.parser = parse_arg,
.doc = argp_program_doc,
};
/* Adapted from perf/util/string.c */
static bool glob_matches(const char *str, const char *pat)
{
while (*str && *pat && *pat != '*') {
if (*str != *pat)
return false;
str++;
pat++;
}
/* Check wild card */
if (*pat == '*') {
while (*pat == '*')
pat++;
if (!*pat) /* Tail wild card matches all */
return true;
while (*str)
if (glob_matches(str++, pat))
return true;
}
return !*str && !*pat;
}
static bool is_bpf_obj_file(const char *path) {
Elf64_Ehdr *ehdr;
int fd, err = -EINVAL;
Elf *elf = NULL;
fd = open(path, O_RDONLY | O_CLOEXEC);
if (fd < 0)
return true; /* we'll fail later and propagate error */
/* ensure libelf is initialized */
(void)elf_version(EV_CURRENT);
elf = elf_begin(fd, ELF_C_READ, NULL);
if (!elf)
goto cleanup;
if (elf_kind(elf) != ELF_K_ELF || gelf_getclass(elf) != ELFCLASS64)
goto cleanup;
ehdr = elf64_getehdr(elf);
/* Old LLVM set e_machine to EM_NONE */
if (!ehdr || ehdr->e_type != ET_REL || (ehdr->e_machine && ehdr->e_machine != EM_BPF))
goto cleanup;
err = 0;
cleanup:
if (elf)
elf_end(elf);
close(fd);
return err == 0;
}
static bool should_process_file_prog(const char *filename, const char *prog_name)
{
struct filter *f;
int i, allow_cnt = 0;
for (i = 0; i < env.deny_filter_cnt; i++) {
f = &env.deny_filters[i];
if (f->kind != FILTER_NAME)
continue;
if (f->any_glob && glob_matches(filename, f->any_glob))
return false;
if (f->any_glob && prog_name && glob_matches(prog_name, f->any_glob))
return false;
if (f->file_glob && glob_matches(filename, f->file_glob))
return false;
if (f->prog_glob && prog_name && glob_matches(prog_name, f->prog_glob))
return false;
}
for (i = 0; i < env.allow_filter_cnt; i++) {
f = &env.allow_filters[i];
if (f->kind != FILTER_NAME)
continue;
allow_cnt++;
if (f->any_glob) {
if (glob_matches(filename, f->any_glob))
return true;
/* If we don't know program name yet, any_glob filter
* has to assume that current BPF object file might be
* relevant; we'll check again later on after opening
* BPF object file, at which point program name will
* be known finally.
*/
if (!prog_name || glob_matches(prog_name, f->any_glob))
return true;
} else {
if (f->file_glob && !glob_matches(filename, f->file_glob))
continue;
if (f->prog_glob && prog_name && !glob_matches(prog_name, f->prog_glob))
continue;
return true;
}
}
/* if there are no file/prog name allow filters, allow all progs,
* unless they are denied earlier explicitly
*/
return allow_cnt == 0;
}
static struct {
enum operator_kind op_kind;
const char *op_str;
} operators[] = {
/* Order of these definitions matter to avoid situations like '<'
* matching part of what is actually a '<>' operator. That is,
* substrings should go last.
*/
{ OP_EQ, "==" },
{ OP_NEQ, "!=" },
{ OP_NEQ, "<>" },
{ OP_LE, "<=" },
{ OP_LT, "<" },
{ OP_GE, ">=" },
{ OP_GT, ">" },
{ OP_EQ, "=" },
};
static bool parse_stat_id_var(const char *name, size_t len, int *id,
enum stat_variant *var, bool *is_abs);
static int append_filter(struct filter **filters, int *cnt, const char *str)
{
struct filter *f;
void *tmp;
const char *p;
int i;
tmp = realloc(*filters, (*cnt + 1) * sizeof(**filters));
if (!tmp)
return -ENOMEM;
*filters = tmp;
f = &(*filters)[*cnt];
memset(f, 0, sizeof(*f));
/* First, let's check if it's a stats filter of the following form:
* <stat><op><value, where:
* - <stat> is one of supported numerical stats (verdict is also
* considered numerical, failure == 0, success == 1);
* - <op> is comparison operator (see `operators` definitions);
* - <value> is an integer (or failure/success, or false/true as
* special aliases for 0 and 1, respectively).
* If the form doesn't match what user provided, we assume file/prog
* glob filter.
*/
for (i = 0; i < ARRAY_SIZE(operators); i++) {
enum stat_variant var;
int id;
long val;
const char *end = str;
const char *op_str;
bool is_abs;
op_str = operators[i].op_str;
p = strstr(str, op_str);
if (!p)
continue;
if (!parse_stat_id_var(str, p - str, &id, &var, &is_abs)) {
fprintf(stderr, "Unrecognized stat name in '%s'!\n", str);
return -EINVAL;
}
if (id >= FILE_NAME) {
fprintf(stderr, "Non-integer stat is specified in '%s'!\n", str);
return -EINVAL;
}
p += strlen(op_str);
if (strcasecmp(p, "true") == 0 ||
strcasecmp(p, "t") == 0 ||
strcasecmp(p, "success") == 0 ||
strcasecmp(p, "succ") == 0 ||
strcasecmp(p, "s") == 0 ||
strcasecmp(p, "match") == 0 ||
strcasecmp(p, "m") == 0) {
val = 1;
} else if (strcasecmp(p, "false") == 0 ||
strcasecmp(p, "f") == 0 ||
strcasecmp(p, "failure") == 0 ||
strcasecmp(p, "fail") == 0 ||
strcasecmp(p, "mismatch") == 0 ||
strcasecmp(p, "mis") == 0) {
val = 0;
} else {
errno = 0;
val = strtol(p, (char **)&end, 10);
if (errno || end == p || *end != '\0' ) {
fprintf(stderr, "Invalid integer value in '%s'!\n", str);
return -EINVAL;
}
}
f->kind = FILTER_STAT;
f->stat_id = id;
f->stat_var = var;
f->op = operators[i].op_kind;
f->abs = true;
f->value = val;
*cnt += 1;
return 0;
}
/* File/prog filter can be specified either as '<glob>' or
* '<file-glob>/<prog-glob>'. In the former case <glob> is applied to
* both file and program names. This seems to be way more useful in
* practice. If user needs full control, they can use '/<prog-glob>'
* form to glob just program name, or '<file-glob>/' to glob only file
* name. But usually common <glob> seems to be the most useful and
* ergonomic way.
*/
f->kind = FILTER_NAME;
p = strchr(str, '/');
if (!p) {
f->any_glob = strdup(str);
if (!f->any_glob)
return -ENOMEM;
} else {
if (str != p) {
/* non-empty file glob */
f->file_glob = strndup(str, p - str);
if (!f->file_glob)
return -ENOMEM;
}
if (strlen(p + 1) > 0) {
/* non-empty prog glob */
f->prog_glob = strdup(p + 1);
if (!f->prog_glob) {
free(f->file_glob);
f->file_glob = NULL;
return -ENOMEM;
}
}
}
*cnt += 1;
return 0;
}
static int append_filter_file(const char *path)
{
char buf[1024];
FILE *f;
int err = 0;
f = fopen(path, "r");
if (!f) {
err = -errno;
fprintf(stderr, "Failed to open filters in '%s': %d\n", path, err);
return err;
}
while (fscanf(f, " %1023[^\n]\n", buf) == 1) {
/* lines starting with # are comments, skip them */
if (buf[0] == '\0' || buf[0] == '#')
continue;
/* lines starting with ! are negative match filters */
if (buf[0] == '!')
err = append_filter(&env.deny_filters, &env.deny_filter_cnt, buf + 1);
else
err = append_filter(&env.allow_filters, &env.allow_filter_cnt, buf);
if (err)
goto cleanup;
}
cleanup:
fclose(f);
return err;
}
static const struct stat_specs default_output_spec = {
.spec_cnt = 7,
.ids = {
FILE_NAME, PROG_NAME, VERDICT, DURATION,
TOTAL_INSNS, TOTAL_STATES, PEAK_STATES,
},
};
static const struct stat_specs default_csv_output_spec = {
.spec_cnt = 9,
.ids = {
FILE_NAME, PROG_NAME, VERDICT, DURATION,
TOTAL_INSNS, TOTAL_STATES, PEAK_STATES,
MAX_STATES_PER_INSN, MARK_READ_MAX_LEN,
},
};
static const struct stat_specs default_sort_spec = {
.spec_cnt = 2,
.ids = {
FILE_NAME, PROG_NAME,
},
.asc = { true, true, },
};
/* sorting for comparison mode to join two data sets */
static const struct stat_specs join_sort_spec = {
.spec_cnt = 2,
.ids = {
FILE_NAME, PROG_NAME,
},
.asc = { true, true, },
};
static struct stat_def {
const char *header;
const char *names[4];
bool asc_by_default;
bool left_aligned;
} stat_defs[] = {
[FILE_NAME] = { "File", {"file_name", "filename", "file"}, true /* asc */, true /* left */ },
[PROG_NAME] = { "Program", {"prog_name", "progname", "prog"}, true /* asc */, true /* left */ },
[VERDICT] = { "Verdict", {"verdict"}, true /* asc: failure, success */, true /* left */ },
[DURATION] = { "Duration (us)", {"duration", "dur"}, },
[TOTAL_INSNS] = { "Insns", {"total_insns", "insns"}, },
[TOTAL_STATES] = { "States", {"total_states", "states"}, },
[PEAK_STATES] = { "Peak states", {"peak_states"}, },
[MAX_STATES_PER_INSN] = { "Max states per insn", {"max_states_per_insn"}, },
[MARK_READ_MAX_LEN] = { "Max mark read length", {"max_mark_read_len", "mark_read"}, },
};
static bool parse_stat_id_var(const char *name, size_t len, int *id,
enum stat_variant *var, bool *is_abs)
{
static const char *var_sfxs[] = {
[VARIANT_A] = "_a",
[VARIANT_B] = "_b",
[VARIANT_DIFF] = "_diff",
[VARIANT_PCT] = "_pct",
};
int i, j, k;
/* |<stat>| means we take absolute value of given stat */
*is_abs = false;
if (len > 2 && name[0] == '|' && name[len - 1] == '|') {
*is_abs = true;
name += 1;
len -= 2;
}
for (i = 0; i < ARRAY_SIZE(stat_defs); i++) {
struct stat_def *def = &stat_defs[i];
size_t alias_len, sfx_len;
const char *alias;
for (j = 0; j < ARRAY_SIZE(stat_defs[i].names); j++) {
alias = def->names[j];
if (!alias)
continue;
alias_len = strlen(alias);
if (strncmp(name, alias, alias_len) != 0)
continue;
if (alias_len == len) {
/* If no variant suffix is specified, we
* assume control group (just in case we are
* in comparison mode. Variant is ignored in
* non-comparison mode.
*/
*var = VARIANT_B;
*id = i;
return true;
}
for (k = 0; k < ARRAY_SIZE(var_sfxs); k++) {
sfx_len = strlen(var_sfxs[k]);
if (alias_len + sfx_len != len)
continue;
if (strncmp(name + alias_len, var_sfxs[k], sfx_len) == 0) {
*var = (enum stat_variant)k;
*id = i;
return true;
}
}
}
}
return false;
}
static bool is_asc_sym(char c)
{
return c == '^';
}
static bool is_desc_sym(char c)
{
return c == 'v' || c == 'V' || c == '.' || c == '!' || c == '_';
}
static int parse_stat(const char *stat_name, struct stat_specs *specs)
{
int id;
bool has_order = false, is_asc = false, is_abs = false;
size_t len = strlen(stat_name);
enum stat_variant var;
if (specs->spec_cnt >= ARRAY_SIZE(specs->ids)) {
fprintf(stderr, "Can't specify more than %zd stats\n", ARRAY_SIZE(specs->ids));
return -E2BIG;
}
if (len > 1 && (is_asc_sym(stat_name[len - 1]) || is_desc_sym(stat_name[len - 1]))) {
has_order = true;
is_asc = is_asc_sym(stat_name[len - 1]);
len -= 1;
}
if (!parse_stat_id_var(stat_name, len, &id, &var, &is_abs)) {
fprintf(stderr, "Unrecognized stat name '%s'\n", stat_name);
return -ESRCH;
}
specs->ids[specs->spec_cnt] = id;
specs->variants[specs->spec_cnt] = var;
specs->asc[specs->spec_cnt] = has_order ? is_asc : stat_defs[id].asc_by_default;
specs->abs[specs->spec_cnt] = is_abs;
specs->spec_cnt++;
return 0;
}
static int parse_stats(const char *stats_str, struct stat_specs *specs)
{
char *input, *state = NULL, *next;
int err;
input = strdup(stats_str);
if (!input)
return -ENOMEM;
while ((next = strtok_r(state ? NULL : input, ",", &state))) {
err = parse_stat(next, specs);
if (err)
return err;
}
return 0;
}
static void free_verif_stats(struct verif_stats *stats, size_t stat_cnt)
{
int i;
if (!stats)
return;
for (i = 0; i < stat_cnt; i++) {
free(stats[i].file_name);
free(stats[i].prog_name);
}
free(stats);
}
static char verif_log_buf[64 * 1024];
#define MAX_PARSED_LOG_LINES 100
static int parse_verif_log(char * const buf, size_t buf_sz, struct verif_stats *s)
{
const char *cur;
int pos, lines;
buf[buf_sz - 1] = '\0';
for (pos = strlen(buf) - 1, lines = 0; pos >= 0 && lines < MAX_PARSED_LOG_LINES; lines++) {
/* find previous endline or otherwise take the start of log buf */
for (cur = &buf[pos]; cur > buf && cur[0] != '\n'; cur--, pos--) {
}
/* next time start from end of previous line (or pos goes to <0) */
pos--;
/* if we found endline, point right after endline symbol;
* otherwise, stay at the beginning of log buf
*/
if (cur[0] == '\n')
cur++;
if (1 == sscanf(cur, "verification time %ld usec\n", &s->stats[DURATION]))
continue;
if (6 == sscanf(cur, "processed %ld insns (limit %*d) max_states_per_insn %ld total_states %ld peak_states %ld mark_read %ld",
&s->stats[TOTAL_INSNS],
&s->stats[MAX_STATES_PER_INSN],
&s->stats[TOTAL_STATES],
&s->stats[PEAK_STATES],
&s->stats[MARK_READ_MAX_LEN]))
continue;
}
return 0;
}
static int guess_prog_type_by_ctx_name(const char *ctx_name,
enum bpf_prog_type *prog_type,
enum bpf_attach_type *attach_type)
{
/* We need to guess program type based on its declared context type.
* This guess can't be perfect as many different program types might
* share the same context type. So we can only hope to reasonably
* well guess this and get lucky.
*
* Just in case, we support both UAPI-side type names and
* kernel-internal names.
*/
static struct {
const char *uapi_name;
const char *kern_name;
enum bpf_prog_type prog_type;
enum bpf_attach_type attach_type;
} ctx_map[] = {
/* __sk_buff is most ambiguous, we assume TC program */
{ "__sk_buff", "sk_buff", BPF_PROG_TYPE_SCHED_CLS },
{ "bpf_sock", "sock", BPF_PROG_TYPE_CGROUP_SOCK, BPF_CGROUP_INET4_POST_BIND },
{ "bpf_sock_addr", "bpf_sock_addr_kern", BPF_PROG_TYPE_CGROUP_SOCK_ADDR, BPF_CGROUP_INET4_BIND },
{ "bpf_sock_ops", "bpf_sock_ops_kern", BPF_PROG_TYPE_SOCK_OPS, BPF_CGROUP_SOCK_OPS },
{ "sk_msg_md", "sk_msg", BPF_PROG_TYPE_SK_MSG, BPF_SK_MSG_VERDICT },
{ "bpf_cgroup_dev_ctx", "bpf_cgroup_dev_ctx", BPF_PROG_TYPE_CGROUP_DEVICE, BPF_CGROUP_DEVICE },
{ "bpf_sysctl", "bpf_sysctl_kern", BPF_PROG_TYPE_CGROUP_SYSCTL, BPF_CGROUP_SYSCTL },
{ "bpf_sockopt", "bpf_sockopt_kern", BPF_PROG_TYPE_CGROUP_SOCKOPT, BPF_CGROUP_SETSOCKOPT },
{ "sk_reuseport_md", "sk_reuseport_kern", BPF_PROG_TYPE_SK_REUSEPORT, BPF_SK_REUSEPORT_SELECT_OR_MIGRATE },
{ "bpf_sk_lookup", "bpf_sk_lookup_kern", BPF_PROG_TYPE_SK_LOOKUP, BPF_SK_LOOKUP },
{ "xdp_md", "xdp_buff", BPF_PROG_TYPE_XDP, BPF_XDP },
/* tracing types with no expected attach type */
{ "bpf_user_pt_regs_t", "pt_regs", BPF_PROG_TYPE_KPROBE },
{ "bpf_perf_event_data", "bpf_perf_event_data_kern", BPF_PROG_TYPE_PERF_EVENT },
/* raw_tp programs use u64[] from kernel side, we don't want
* to match on that, probably; so NULL for kern-side type
*/
{ "bpf_raw_tracepoint_args", NULL, BPF_PROG_TYPE_RAW_TRACEPOINT },
};
int i;
if (!ctx_name)
return -EINVAL;
for (i = 0; i < ARRAY_SIZE(ctx_map); i++) {
if (strcmp(ctx_map[i].uapi_name, ctx_name) == 0 ||
(ctx_map[i].kern_name && strcmp(ctx_map[i].kern_name, ctx_name) == 0)) {
*prog_type = ctx_map[i].prog_type;
*attach_type = ctx_map[i].attach_type;
return 0;
}
}
return -ESRCH;
}
static void fixup_obj(struct bpf_object *obj, struct bpf_program *prog, const char *filename)
{
struct bpf_map *map;
bpf_object__for_each_map(map, obj) {
/* disable pinning */
bpf_map__set_pin_path(map, NULL);
/* fix up map size, if necessary */
switch (bpf_map__type(map)) {
case BPF_MAP_TYPE_SK_STORAGE:
case BPF_MAP_TYPE_TASK_STORAGE:
case BPF_MAP_TYPE_INODE_STORAGE:
case BPF_MAP_TYPE_CGROUP_STORAGE:
break;
default:
if (bpf_map__max_entries(map) == 0)
bpf_map__set_max_entries(map, 1);
}
}
/* SEC(freplace) programs can't be loaded with veristat as is,
* but we can try guessing their target program's expected type by
* looking at the type of program's first argument and substituting
* corresponding program type
*/
if (bpf_program__type(prog) == BPF_PROG_TYPE_EXT) {
const struct btf *btf = bpf_object__btf(obj);
const char *prog_name = bpf_program__name(prog);
enum bpf_prog_type prog_type;
enum bpf_attach_type attach_type;
const struct btf_type *t;
const char *ctx_name;
int id;
if (!btf)
goto skip_freplace_fixup;
id = btf__find_by_name_kind(btf, prog_name, BTF_KIND_FUNC);
t = btf__type_by_id(btf, id);
t = btf__type_by_id(btf, t->type);
if (!btf_is_func_proto(t) || btf_vlen(t) != 1)
goto skip_freplace_fixup;
/* context argument is a pointer to a struct/typedef */
t = btf__type_by_id(btf, btf_params(t)[0].type);
while (t && btf_is_mod(t))
t = btf__type_by_id(btf, t->type);
if (!t || !btf_is_ptr(t))
goto skip_freplace_fixup;
t = btf__type_by_id(btf, t->type);
while (t && btf_is_mod(t))
t = btf__type_by_id(btf, t->type);
if (!t)
goto skip_freplace_fixup;
ctx_name = btf__name_by_offset(btf, t->name_off);
if (guess_prog_type_by_ctx_name(ctx_name, &prog_type, &attach_type) == 0) {
bpf_program__set_type(prog, prog_type);
bpf_program__set_expected_attach_type(prog, attach_type);
if (!env.quiet) {
printf("Using guessed program type '%s' for %s/%s...\n",
libbpf_bpf_prog_type_str(prog_type),
filename, prog_name);
}
} else {
if (!env.quiet) {
printf("Failed to guess program type for freplace program with context type name '%s' for %s/%s. Consider using canonical type names to help veristat...\n",
ctx_name, filename, prog_name);
}
}
}
skip_freplace_fixup:
return;
}
static int process_prog(const char *filename, struct bpf_object *obj, struct bpf_program *prog)
{
const char *prog_name = bpf_program__name(prog);
const char *base_filename = basename(filename);
char *buf;
int buf_sz, log_level;
struct verif_stats *stats;
int err = 0;
void *tmp;
if (!should_process_file_prog(base_filename, bpf_program__name(prog))) {
env.progs_skipped++;
return 0;
}
tmp = realloc(env.prog_stats, (env.prog_stat_cnt + 1) * sizeof(*env.prog_stats));
if (!tmp)
return -ENOMEM;
env.prog_stats = tmp;
stats = &env.prog_stats[env.prog_stat_cnt++];
memset(stats, 0, sizeof(*stats));
if (env.verbose) {
buf_sz = env.log_size ? env.log_size : 16 * 1024 * 1024;
buf = malloc(buf_sz);
if (!buf)
return -ENOMEM;
/* ensure we always request stats */
log_level = env.log_level | 4 | (env.log_fixed ? 8 : 0);
} else {
buf = verif_log_buf;
buf_sz = sizeof(verif_log_buf);
/* request only verifier stats */
log_level = 4 | (env.log_fixed ? 8 : 0);
}
verif_log_buf[0] = '\0';
bpf_program__set_log_buf(prog, buf, buf_sz);
bpf_program__set_log_level(prog, log_level);
/* increase chances of successful BPF object loading */
fixup_obj(obj, prog, base_filename);
if (env.force_checkpoints)
bpf_program__set_flags(prog, bpf_program__flags(prog) | BPF_F_TEST_STATE_FREQ);
if (env.force_reg_invariants)
bpf_program__set_flags(prog, bpf_program__flags(prog) | BPF_F_TEST_REG_INVARIANTS);
err = bpf_object__load(obj);
env.progs_processed++;
stats->file_name = strdup(base_filename);
stats->prog_name = strdup(bpf_program__name(prog));
stats->stats[VERDICT] = err == 0; /* 1 - success, 0 - failure */
parse_verif_log(buf, buf_sz, stats);
if (env.verbose) {
printf("PROCESSING %s/%s, DURATION US: %ld, VERDICT: %s, VERIFIER LOG:\n%s\n",
filename, prog_name, stats->stats[DURATION],
err ? "failure" : "success", buf);
}
if (verif_log_buf != buf)
free(buf);
return 0;
};
static int process_obj(const char *filename)
{
struct bpf_object *obj = NULL, *tobj;
struct bpf_program *prog, *tprog, *lprog;
libbpf_print_fn_t old_libbpf_print_fn;
LIBBPF_OPTS(bpf_object_open_opts, opts);
int err = 0, prog_cnt = 0;
if (!should_process_file_prog(basename(filename), NULL)) {
if (env.verbose)
printf("Skipping '%s' due to filters...\n", filename);
env.files_skipped++;
return 0;
}
if (!is_bpf_obj_file(filename)) {
if (env.verbose)
printf("Skipping '%s' as it's not a BPF object file...\n", filename);
env.files_skipped++;
return 0;
}
if (!env.quiet && env.out_fmt == RESFMT_TABLE)
printf("Processing '%s'...\n", basename(filename));
old_libbpf_print_fn = libbpf_set_print(libbpf_print_fn);
obj = bpf_object__open_file(filename, &opts);
if (!obj) {
/* if libbpf can't open BPF object file, it could be because
* that BPF object file is incomplete and has to be statically
* linked into a final BPF object file; instead of bailing
* out, report it into stderr, mark it as skipped, and
* proceed
*/
fprintf(stderr, "Failed to open '%s': %d\n", filename, -errno);
env.files_skipped++;
err = 0;
goto cleanup;
}
env.files_processed++;
bpf_object__for_each_program(prog, obj) {
prog_cnt++;
}
if (prog_cnt == 1) {
prog = bpf_object__next_program(obj, NULL);
bpf_program__set_autoload(prog, true);
process_prog(filename, obj, prog);
goto cleanup;
}
bpf_object__for_each_program(prog, obj) {
const char *prog_name = bpf_program__name(prog);
tobj = bpf_object__open_file(filename, &opts);
if (!tobj) {
err = -errno;
fprintf(stderr, "Failed to open '%s': %d\n", filename, err);
goto cleanup;
}
lprog = NULL;
bpf_object__for_each_program(tprog, tobj) {
const char *tprog_name = bpf_program__name(tprog);
if (strcmp(prog_name, tprog_name) == 0) {
bpf_program__set_autoload(tprog, true);
lprog = tprog;
} else {
bpf_program__set_autoload(tprog, false);
}
}
process_prog(filename, tobj, lprog);
bpf_object__close(tobj);
}
cleanup:
bpf_object__close(obj);
libbpf_set_print(old_libbpf_print_fn);
return err;
}
static int cmp_stat(const struct verif_stats *s1, const struct verif_stats *s2,
enum stat_id id, bool asc, bool abs)
{
int cmp = 0;
switch (id) {
case FILE_NAME:
cmp = strcmp(s1->file_name, s2->file_name);
break;
case PROG_NAME:
cmp = strcmp(s1->prog_name, s2->prog_name);
break;
case VERDICT:
case DURATION:
case TOTAL_INSNS:
case TOTAL_STATES:
case PEAK_STATES:
case MAX_STATES_PER_INSN:
case MARK_READ_MAX_LEN: {
long v1 = s1->stats[id];
long v2 = s2->stats[id];
if (abs) {
v1 = v1 < 0 ? -v1 : v1;
v2 = v2 < 0 ? -v2 : v2;
}
if (v1 != v2)
cmp = v1 < v2 ? -1 : 1;
break;
}
default:
fprintf(stderr, "Unrecognized stat #%d\n", id);
exit(1);
}
return asc ? cmp : -cmp;
}
static int cmp_prog_stats(const void *v1, const void *v2)
{
const struct verif_stats *s1 = v1, *s2 = v2;
int i, cmp;
for (i = 0; i < env.sort_spec.spec_cnt; i++) {
cmp = cmp_stat(s1, s2, env.sort_spec.ids[i],
env.sort_spec.asc[i], env.sort_spec.abs[i]);
if (cmp != 0)
return cmp;
}
/* always disambiguate with file+prog, which are unique */
cmp = strcmp(s1->file_name, s2->file_name);
if (cmp != 0)
return cmp;
return strcmp(s1->prog_name, s2->prog_name);
}
static void fetch_join_stat_value(const struct verif_stats_join *s,
enum stat_id id, enum stat_variant var,
const char **str_val,
double *num_val)
{
long v1, v2;
if (id == FILE_NAME) {
*str_val = s->file_name;
return;
}
if (id == PROG_NAME) {
*str_val = s->prog_name;
return;
}
v1 = s->stats_a ? s->stats_a->stats[id] : 0;
v2 = s->stats_b ? s->stats_b->stats[id] : 0;
switch (var) {
case VARIANT_A:
if (!s->stats_a)
*num_val = -DBL_MAX;
else
*num_val = s->stats_a->stats[id];
return;
case VARIANT_B:
if (!s->stats_b)
*num_val = -DBL_MAX;
else
*num_val = s->stats_b->stats[id];
return;
case VARIANT_DIFF:
if (!s->stats_a || !s->stats_b)
*num_val = -DBL_MAX;
else if (id == VERDICT)
*num_val = v1 == v2 ? 1.0 /* MATCH */ : 0.0 /* MISMATCH */;
else
*num_val = (double)(v2 - v1);
return;
case VARIANT_PCT:
if (!s->stats_a || !s->stats_b) {
*num_val = -DBL_MAX;
} else if (v1 == 0) {
if (v1 == v2)
*num_val = 0.0;
else
*num_val = v2 < v1 ? -100.0 : 100.0;
} else {
*num_val = (v2 - v1) * 100.0 / v1;
}
return;
}
}
static int cmp_join_stat(const struct verif_stats_join *s1,
const struct verif_stats_join *s2,
enum stat_id id, enum stat_variant var,
bool asc, bool abs)
{
const char *str1 = NULL, *str2 = NULL;
double v1 = 0.0, v2 = 0.0;
int cmp = 0;
fetch_join_stat_value(s1, id, var, &str1, &v1);
fetch_join_stat_value(s2, id, var, &str2, &v2);
if (abs) {
v1 = fabs(v1);
v2 = fabs(v2);
}
if (str1)
cmp = strcmp(str1, str2);
else if (v1 != v2)
cmp = v1 < v2 ? -1 : 1;
return asc ? cmp : -cmp;
}
static int cmp_join_stats(const void *v1, const void *v2)
{
const struct verif_stats_join *s1 = v1, *s2 = v2;
int i, cmp;
for (i = 0; i < env.sort_spec.spec_cnt; i++) {
cmp = cmp_join_stat(s1, s2,
env.sort_spec.ids[i],
env.sort_spec.variants[i],
env.sort_spec.asc[i],
env.sort_spec.abs[i]);
if (cmp != 0)
return cmp;
}
/* always disambiguate with file+prog, which are unique */
cmp = strcmp(s1->file_name, s2->file_name);
if (cmp != 0)
return cmp;
return strcmp(s1->prog_name, s2->prog_name);
}
#define HEADER_CHAR '-'
#define COLUMN_SEP " "
static void output_header_underlines(void)
{
int i, j, len;
for (i = 0; i < env.output_spec.spec_cnt; i++) {
len = env.output_spec.lens[i];
printf("%s", i == 0 ? "" : COLUMN_SEP);
for (j = 0; j < len; j++)
printf("%c", HEADER_CHAR);
}
printf("\n");
}
static void output_headers(enum resfmt fmt)
{
const char *fmt_str;
int i, len;
for (i = 0; i < env.output_spec.spec_cnt; i++) {
int id = env.output_spec.ids[i];
int *max_len = &env.output_spec.lens[i];
switch (fmt) {
case RESFMT_TABLE_CALCLEN:
len = snprintf(NULL, 0, "%s", stat_defs[id].header);
if (len > *max_len)
*max_len = len;
break;
case RESFMT_TABLE:
fmt_str = stat_defs[id].left_aligned ? "%s%-*s" : "%s%*s";
printf(fmt_str, i == 0 ? "" : COLUMN_SEP, *max_len, stat_defs[id].header);
if (i == env.output_spec.spec_cnt - 1)
printf("\n");
break;
case RESFMT_CSV:
printf("%s%s", i == 0 ? "" : ",", stat_defs[id].names[0]);
if (i == env.output_spec.spec_cnt - 1)
printf("\n");
break;
}
}
if (fmt == RESFMT_TABLE)
output_header_underlines();
}
static void prepare_value(const struct verif_stats *s, enum stat_id id,
const char **str, long *val)
{
switch (id) {
case FILE_NAME:
*str = s ? s->file_name : "N/A";
break;
case PROG_NAME:
*str = s ? s->prog_name : "N/A";
break;
case VERDICT:
if (!s)
*str = "N/A";
else
*str = s->stats[VERDICT] ? "success" : "failure";
break;
case DURATION:
case TOTAL_INSNS:
case TOTAL_STATES:
case PEAK_STATES:
case MAX_STATES_PER_INSN:
case MARK_READ_MAX_LEN:
*val = s ? s->stats[id] : 0;
break;
default:
fprintf(stderr, "Unrecognized stat #%d\n", id);
exit(1);
}
}
static void output_stats(const struct verif_stats *s, enum resfmt fmt, bool last)
{
int i;
for (i = 0; i < env.output_spec.spec_cnt; i++) {
int id = env.output_spec.ids[i];
int *max_len = &env.output_spec.lens[i], len;
const char *str = NULL;
long val = 0;
prepare_value(s, id, &str, &val);
switch (fmt) {
case RESFMT_TABLE_CALCLEN:
if (str)
len = snprintf(NULL, 0, "%s", str);
else
len = snprintf(NULL, 0, "%ld", val);
if (len > *max_len)
*max_len = len;
break;
case RESFMT_TABLE:
if (str)
printf("%s%-*s", i == 0 ? "" : COLUMN_SEP, *max_len, str);
else
printf("%s%*ld", i == 0 ? "" : COLUMN_SEP, *max_len, val);
if (i == env.output_spec.spec_cnt - 1)
printf("\n");
break;
case RESFMT_CSV:
if (str)
printf("%s%s", i == 0 ? "" : ",", str);
else
printf("%s%ld", i == 0 ? "" : ",", val);
if (i == env.output_spec.spec_cnt - 1)
printf("\n");
break;
}
}
if (last && fmt == RESFMT_TABLE) {
output_header_underlines();
printf("Done. Processed %d files, %d programs. Skipped %d files, %d programs.\n",
env.files_processed, env.files_skipped, env.progs_processed, env.progs_skipped);
}
}
static int parse_stat_value(const char *str, enum stat_id id, struct verif_stats *st)
{
switch (id) {
case FILE_NAME:
st->file_name = strdup(str);
if (!st->file_name)
return -ENOMEM;
break;
case PROG_NAME:
st->prog_name = strdup(str);
if (!st->prog_name)
return -ENOMEM;
break;
case VERDICT:
if (strcmp(str, "success") == 0) {
st->stats[VERDICT] = true;
} else if (strcmp(str, "failure") == 0) {
st->stats[VERDICT] = false;
} else {
fprintf(stderr, "Unrecognized verification verdict '%s'\n", str);
return -EINVAL;
}
break;
case DURATION:
case TOTAL_INSNS:
case TOTAL_STATES:
case PEAK_STATES:
case MAX_STATES_PER_INSN:
case MARK_READ_MAX_LEN: {
long val;
int err, n;
if (sscanf(str, "%ld %n", &val, &n) != 1 || n != strlen(str)) {
err = -errno;
fprintf(stderr, "Failed to parse '%s' as integer\n", str);
return err;
}
st->stats[id] = val;
break;
}
default:
fprintf(stderr, "Unrecognized stat #%d\n", id);
return -EINVAL;
}
return 0;
}
static int parse_stats_csv(const char *filename, struct stat_specs *specs,
struct verif_stats **statsp, int *stat_cntp)
{
char line[4096];
FILE *f;
int err = 0;
bool header = true;
f = fopen(filename, "r");
if (!f) {
err = -errno;
fprintf(stderr, "Failed to open '%s': %d\n", filename, err);
return err;
}
*stat_cntp = 0;
while (fgets(line, sizeof(line), f)) {
char *input = line, *state = NULL, *next;
struct verif_stats *st = NULL;
int col = 0;
if (!header) {
void *tmp;
tmp = realloc(*statsp, (*stat_cntp + 1) * sizeof(**statsp));
if (!tmp) {
err = -ENOMEM;
goto cleanup;
}
*statsp = tmp;
st = &(*statsp)[*stat_cntp];
memset(st, 0, sizeof(*st));
*stat_cntp += 1;
}
while ((next = strtok_r(state ? NULL : input, ",\n", &state))) {
if (header) {
/* for the first line, set up spec stats */
err = parse_stat(next, specs);
if (err)
goto cleanup;
continue;
}
/* for all other lines, parse values based on spec */
if (col >= specs->spec_cnt) {
fprintf(stderr, "Found extraneous column #%d in row #%d of '%s'\n",
col, *stat_cntp, filename);
err = -EINVAL;
goto cleanup;
}
err = parse_stat_value(next, specs->ids[col], st);
if (err)
goto cleanup;
col++;
}
if (header) {
header = false;
continue;
}
if (col < specs->spec_cnt) {
fprintf(stderr, "Not enough columns in row #%d in '%s'\n",
*stat_cntp, filename);
err = -EINVAL;
goto cleanup;
}
if (!st->file_name || !st->prog_name) {
fprintf(stderr, "Row #%d in '%s' is missing file and/or program name\n",
*stat_cntp, filename);
err = -EINVAL;
goto cleanup;
}
/* in comparison mode we can only check filters after we
* parsed entire line; if row should be ignored we pretend we
* never parsed it
*/
if (!should_process_file_prog(st->file_name, st->prog_name)) {
free(st->file_name);
free(st->prog_name);
*stat_cntp -= 1;
}
}
if (!feof(f)) {
err = -errno;
fprintf(stderr, "Failed I/O for '%s': %d\n", filename, err);
}
cleanup:
fclose(f);
return err;
}
/* empty/zero stats for mismatched rows */
static const struct verif_stats fallback_stats = { .file_name = "", .prog_name = "" };
static bool is_key_stat(enum stat_id id)
{
return id == FILE_NAME || id == PROG_NAME;
}
static void output_comp_header_underlines(void)
{
int i, j, k;
for (i = 0; i < env.output_spec.spec_cnt; i++) {
int id = env.output_spec.ids[i];
int max_j = is_key_stat(id) ? 1 : 3;
for (j = 0; j < max_j; j++) {
int len = env.output_spec.lens[3 * i + j];
printf("%s", i + j == 0 ? "" : COLUMN_SEP);
for (k = 0; k < len; k++)
printf("%c", HEADER_CHAR);
}
}
printf("\n");
}
static void output_comp_headers(enum resfmt fmt)
{
static const char *table_sfxs[3] = {" (A)", " (B)", " (DIFF)"};
static const char *name_sfxs[3] = {"_base", "_comp", "_diff"};
int i, j, len;
for (i = 0; i < env.output_spec.spec_cnt; i++) {
int id = env.output_spec.ids[i];
/* key stats don't have A/B/DIFF columns, they are common for both data sets */
int max_j = is_key_stat(id) ? 1 : 3;
for (j = 0; j < max_j; j++) {
int *max_len = &env.output_spec.lens[3 * i + j];
bool last = (i == env.output_spec.spec_cnt - 1) && (j == max_j - 1);
const char *sfx;
switch (fmt) {
case RESFMT_TABLE_CALCLEN:
sfx = is_key_stat(id) ? "" : table_sfxs[j];
len = snprintf(NULL, 0, "%s%s", stat_defs[id].header, sfx);
if (len > *max_len)
*max_len = len;
break;
case RESFMT_TABLE:
sfx = is_key_stat(id) ? "" : table_sfxs[j];
printf("%s%-*s%s", i + j == 0 ? "" : COLUMN_SEP,
*max_len - (int)strlen(sfx), stat_defs[id].header, sfx);
if (last)
printf("\n");
break;
case RESFMT_CSV:
sfx = is_key_stat(id) ? "" : name_sfxs[j];
printf("%s%s%s", i + j == 0 ? "" : ",", stat_defs[id].names[0], sfx);
if (last)
printf("\n");
break;
}
}
}
if (fmt == RESFMT_TABLE)
output_comp_header_underlines();
}
static void output_comp_stats(const struct verif_stats_join *join_stats,
enum resfmt fmt, bool last)
{
const struct verif_stats *base = join_stats->stats_a;
const struct verif_stats *comp = join_stats->stats_b;
char base_buf[1024] = {}, comp_buf[1024] = {}, diff_buf[1024] = {};
int i;
for (i = 0; i < env.output_spec.spec_cnt; i++) {
int id = env.output_spec.ids[i], len;
int *max_len_base = &env.output_spec.lens[3 * i + 0];
int *max_len_comp = &env.output_spec.lens[3 * i + 1];
int *max_len_diff = &env.output_spec.lens[3 * i + 2];
const char *base_str = NULL, *comp_str = NULL;
long base_val = 0, comp_val = 0, diff_val = 0;
prepare_value(base, id, &base_str, &base_val);
prepare_value(comp, id, &comp_str, &comp_val);
/* normalize all the outputs to be in string buffers for simplicity */
if (is_key_stat(id)) {
/* key stats (file and program name) are always strings */
if (base)
snprintf(base_buf, sizeof(base_buf), "%s", base_str);
else
snprintf(base_buf, sizeof(base_buf), "%s", comp_str);
} else if (base_str) {
snprintf(base_buf, sizeof(base_buf), "%s", base_str);
snprintf(comp_buf, sizeof(comp_buf), "%s", comp_str);
if (!base || !comp)
snprintf(diff_buf, sizeof(diff_buf), "%s", "N/A");
else if (strcmp(base_str, comp_str) == 0)
snprintf(diff_buf, sizeof(diff_buf), "%s", "MATCH");
else
snprintf(diff_buf, sizeof(diff_buf), "%s", "MISMATCH");
} else {
double p = 0.0;
if (base)
snprintf(base_buf, sizeof(base_buf), "%ld", base_val);
else
snprintf(base_buf, sizeof(base_buf), "%s", "N/A");
if (comp)
snprintf(comp_buf, sizeof(comp_buf), "%ld", comp_val);
else
snprintf(comp_buf, sizeof(comp_buf), "%s", "N/A");
diff_val = comp_val - base_val;
if (!base || !comp) {
snprintf(diff_buf, sizeof(diff_buf), "%s", "N/A");
} else {
if (base_val == 0) {
if (comp_val == base_val)
p = 0.0; /* avoid +0 (+100%) case */
else
p = comp_val < base_val ? -100.0 : 100.0;
} else {
p = diff_val * 100.0 / base_val;
}
snprintf(diff_buf, sizeof(diff_buf), "%+ld (%+.2lf%%)", diff_val, p);
}
}
switch (fmt) {
case RESFMT_TABLE_CALCLEN:
len = strlen(base_buf);
if (len > *max_len_base)
*max_len_base = len;
if (!is_key_stat(id)) {
len = strlen(comp_buf);
if (len > *max_len_comp)
*max_len_comp = len;
len = strlen(diff_buf);
if (len > *max_len_diff)
*max_len_diff = len;
}
break;
case RESFMT_TABLE: {
/* string outputs are left-aligned, number outputs are right-aligned */
const char *fmt = base_str ? "%s%-*s" : "%s%*s";
printf(fmt, i == 0 ? "" : COLUMN_SEP, *max_len_base, base_buf);
if (!is_key_stat(id)) {
printf(fmt, COLUMN_SEP, *max_len_comp, comp_buf);
printf(fmt, COLUMN_SEP, *max_len_diff, diff_buf);
}
if (i == env.output_spec.spec_cnt - 1)
printf("\n");
break;
}
case RESFMT_CSV:
printf("%s%s", i == 0 ? "" : ",", base_buf);
if (!is_key_stat(id)) {
printf("%s%s", i == 0 ? "" : ",", comp_buf);
printf("%s%s", i == 0 ? "" : ",", diff_buf);
}
if (i == env.output_spec.spec_cnt - 1)
printf("\n");
break;
}
}
if (last && fmt == RESFMT_TABLE)
output_comp_header_underlines();
}
static int cmp_stats_key(const struct verif_stats *base, const struct verif_stats *comp)
{
int r;
r = strcmp(base->file_name, comp->file_name);
if (r != 0)
return r;
return strcmp(base->prog_name, comp->prog_name);
}
static bool is_join_stat_filter_matched(struct filter *f, const struct verif_stats_join *stats)
{
static const double eps = 1e-9;
const char *str = NULL;
double value = 0.0;
fetch_join_stat_value(stats, f->stat_id, f->stat_var, &str, &value);
if (f->abs)
value = fabs(value);
switch (f->op) {
case OP_EQ: return value > f->value - eps && value < f->value + eps;
case OP_NEQ: return value < f->value - eps || value > f->value + eps;
case OP_LT: return value < f->value - eps;
case OP_LE: return value <= f->value + eps;
case OP_GT: return value > f->value + eps;
case OP_GE: return value >= f->value - eps;
}
fprintf(stderr, "BUG: unknown filter op %d!\n", f->op);
return false;
}
static bool should_output_join_stats(const struct verif_stats_join *stats)
{
struct filter *f;
int i, allow_cnt = 0;
for (i = 0; i < env.deny_filter_cnt; i++) {
f = &env.deny_filters[i];
if (f->kind != FILTER_STAT)
continue;
if (is_join_stat_filter_matched(f, stats))
return false;
}
for (i = 0; i < env.allow_filter_cnt; i++) {
f = &env.allow_filters[i];
if (f->kind != FILTER_STAT)
continue;
allow_cnt++;
if (is_join_stat_filter_matched(f, stats))
return true;
}
/* if there are no stat allowed filters, pass everything through */
return allow_cnt == 0;
}
static int handle_comparison_mode(void)
{
struct stat_specs base_specs = {}, comp_specs = {};
struct stat_specs tmp_sort_spec;
enum resfmt cur_fmt;
int err, i, j, last_idx, cnt;
if (env.filename_cnt != 2) {
fprintf(stderr, "Comparison mode expects exactly two input CSV files!\n\n");
argp_help(&argp, stderr, ARGP_HELP_USAGE, "veristat");
return -EINVAL;
}
err = parse_stats_csv(env.filenames[0], &base_specs,
&env.baseline_stats, &env.baseline_stat_cnt);
if (err) {
fprintf(stderr, "Failed to parse stats from '%s': %d\n", env.filenames[0], err);
return err;
}
err = parse_stats_csv(env.filenames[1], &comp_specs,
&env.prog_stats, &env.prog_stat_cnt);
if (err) {
fprintf(stderr, "Failed to parse stats from '%s': %d\n", env.filenames[1], err);
return err;
}
/* To keep it simple we validate that the set and order of stats in
* both CSVs are exactly the same. This can be lifted with a bit more
* pre-processing later.
*/
if (base_specs.spec_cnt != comp_specs.spec_cnt) {
fprintf(stderr, "Number of stats in '%s' and '%s' differs (%d != %d)!\n",
env.filenames[0], env.filenames[1],
base_specs.spec_cnt, comp_specs.spec_cnt);
return -EINVAL;
}
for (i = 0; i < base_specs.spec_cnt; i++) {
if (base_specs.ids[i] != comp_specs.ids[i]) {
fprintf(stderr, "Stats composition differs between '%s' and '%s' (%s != %s)!\n",
env.filenames[0], env.filenames[1],
stat_defs[base_specs.ids[i]].names[0],
stat_defs[comp_specs.ids[i]].names[0]);
return -EINVAL;
}
}
/* Replace user-specified sorting spec with file+prog sorting rule to
* be able to join two datasets correctly. Once we are done, we will
* restore the original sort spec.
*/
tmp_sort_spec = env.sort_spec;
env.sort_spec = join_sort_spec;
qsort(env.prog_stats, env.prog_stat_cnt, sizeof(*env.prog_stats), cmp_prog_stats);
qsort(env.baseline_stats, env.baseline_stat_cnt, sizeof(*env.baseline_stats), cmp_prog_stats);
env.sort_spec = tmp_sort_spec;
/* Join two datasets together. If baseline and comparison datasets
* have different subset of rows (we match by 'object + prog' as
* a unique key) then assume empty/missing/zero value for rows that
* are missing in the opposite data set.
*/
i = j = 0;
while (i < env.baseline_stat_cnt || j < env.prog_stat_cnt) {
const struct verif_stats *base, *comp;
struct verif_stats_join *join;
void *tmp;
int r;
base = i < env.baseline_stat_cnt ? &env.baseline_stats[i] : &fallback_stats;
comp = j < env.prog_stat_cnt ? &env.prog_stats[j] : &fallback_stats;
if (!base->file_name || !base->prog_name) {
fprintf(stderr, "Entry #%d in '%s' doesn't have file and/or program name specified!\n",
i, env.filenames[0]);
return -EINVAL;
}
if (!comp->file_name || !comp->prog_name) {
fprintf(stderr, "Entry #%d in '%s' doesn't have file and/or program name specified!\n",
j, env.filenames[1]);
return -EINVAL;
}
tmp = realloc(env.join_stats, (env.join_stat_cnt + 1) * sizeof(*env.join_stats));
if (!tmp)
return -ENOMEM;
env.join_stats = tmp;
join = &env.join_stats[env.join_stat_cnt];
memset(join, 0, sizeof(*join));
r = cmp_stats_key(base, comp);
if (r == 0) {
join->file_name = base->file_name;
join->prog_name = base->prog_name;
join->stats_a = base;
join->stats_b = comp;
i++;
j++;
} else if (base != &fallback_stats && (comp == &fallback_stats || r < 0)) {
join->file_name = base->file_name;
join->prog_name = base->prog_name;
join->stats_a = base;
join->stats_b = NULL;
i++;
} else if (comp != &fallback_stats && (base == &fallback_stats || r > 0)) {
join->file_name = comp->file_name;
join->prog_name = comp->prog_name;
join->stats_a = NULL;
join->stats_b = comp;
j++;
} else {
fprintf(stderr, "%s:%d: should never reach here i=%i, j=%i",
__FILE__, __LINE__, i, j);
return -EINVAL;
}
env.join_stat_cnt += 1;
}
/* now sort joined results according to sort spec */
qsort(env.join_stats, env.join_stat_cnt, sizeof(*env.join_stats), cmp_join_stats);
/* for human-readable table output we need to do extra pass to
* calculate column widths, so we substitute current output format
* with RESFMT_TABLE_CALCLEN and later revert it back to RESFMT_TABLE
* and do everything again.
*/
if (env.out_fmt == RESFMT_TABLE)
cur_fmt = RESFMT_TABLE_CALCLEN;
else
cur_fmt = env.out_fmt;
one_more_time:
output_comp_headers(cur_fmt);
last_idx = -1;
cnt = 0;
for (i = 0; i < env.join_stat_cnt; i++) {
const struct verif_stats_join *join = &env.join_stats[i];
if (!should_output_join_stats(join))
continue;
if (env.top_n && cnt >= env.top_n)
break;
if (cur_fmt == RESFMT_TABLE_CALCLEN)
last_idx = i;
output_comp_stats(join, cur_fmt, i == last_idx);
cnt++;
}
if (cur_fmt == RESFMT_TABLE_CALCLEN) {
cur_fmt = RESFMT_TABLE;
goto one_more_time; /* ... this time with feeling */
}
return 0;
}
static bool is_stat_filter_matched(struct filter *f, const struct verif_stats *stats)
{
long value = stats->stats[f->stat_id];
if (f->abs)
value = value < 0 ? -value : value;
switch (f->op) {
case OP_EQ: return value == f->value;
case OP_NEQ: return value != f->value;
case OP_LT: return value < f->value;
case OP_LE: return value <= f->value;
case OP_GT: return value > f->value;
case OP_GE: return value >= f->value;
}
fprintf(stderr, "BUG: unknown filter op %d!\n", f->op);
return false;
}
static bool should_output_stats(const struct verif_stats *stats)
{
struct filter *f;
int i, allow_cnt = 0;
for (i = 0; i < env.deny_filter_cnt; i++) {
f = &env.deny_filters[i];
if (f->kind != FILTER_STAT)
continue;
if (is_stat_filter_matched(f, stats))
return false;
}
for (i = 0; i < env.allow_filter_cnt; i++) {
f = &env.allow_filters[i];
if (f->kind != FILTER_STAT)
continue;
allow_cnt++;
if (is_stat_filter_matched(f, stats))
return true;
}
/* if there are no stat allowed filters, pass everything through */
return allow_cnt == 0;
}
static void output_prog_stats(void)
{
const struct verif_stats *stats;
int i, last_stat_idx = 0, cnt = 0;
if (env.out_fmt == RESFMT_TABLE) {
/* calculate column widths */
output_headers(RESFMT_TABLE_CALCLEN);
for (i = 0; i < env.prog_stat_cnt; i++) {
stats = &env.prog_stats[i];
if (!should_output_stats(stats))
continue;
output_stats(stats, RESFMT_TABLE_CALCLEN, false);
last_stat_idx = i;
}
}
/* actually output the table */
output_headers(env.out_fmt);
for (i = 0; i < env.prog_stat_cnt; i++) {
stats = &env.prog_stats[i];
if (!should_output_stats(stats))
continue;
if (env.top_n && cnt >= env.top_n)
break;
output_stats(stats, env.out_fmt, i == last_stat_idx);
cnt++;
}
}
static int handle_verif_mode(void)
{
int i, err;
if (env.filename_cnt == 0) {
fprintf(stderr, "Please provide path to BPF object file!\n\n");
argp_help(&argp, stderr, ARGP_HELP_USAGE, "veristat");
return -EINVAL;
}
for (i = 0; i < env.filename_cnt; i++) {
err = process_obj(env.filenames[i]);
if (err) {
fprintf(stderr, "Failed to process '%s': %d\n", env.filenames[i], err);
return err;
}
}
qsort(env.prog_stats, env.prog_stat_cnt, sizeof(*env.prog_stats), cmp_prog_stats);
output_prog_stats();
return 0;
}
static int handle_replay_mode(void)
{
struct stat_specs specs = {};
int err;
if (env.filename_cnt != 1) {
fprintf(stderr, "Replay mode expects exactly one input CSV file!\n\n");
argp_help(&argp, stderr, ARGP_HELP_USAGE, "veristat");
return -EINVAL;
}
err = parse_stats_csv(env.filenames[0], &specs,
&env.prog_stats, &env.prog_stat_cnt);
if (err) {
fprintf(stderr, "Failed to parse stats from '%s': %d\n", env.filenames[0], err);
return err;
}
qsort(env.prog_stats, env.prog_stat_cnt, sizeof(*env.prog_stats), cmp_prog_stats);
output_prog_stats();
return 0;
}
int main(int argc, char **argv)
{
int err = 0, i;
if (argp_parse(&argp, argc, argv, 0, NULL, NULL))
return 1;
if (env.show_version) {
printf("%s\n", argp_program_version);
return 0;
}
if (env.verbose && env.quiet) {
fprintf(stderr, "Verbose and quiet modes are incompatible, please specify just one or neither!\n\n");
argp_help(&argp, stderr, ARGP_HELP_USAGE, "veristat");
return 1;
}
if (env.verbose && env.log_level == 0)
env.log_level = 1;
if (env.output_spec.spec_cnt == 0) {
if (env.out_fmt == RESFMT_CSV)
env.output_spec = default_csv_output_spec;
else
env.output_spec = default_output_spec;
}
if (env.sort_spec.spec_cnt == 0)
env.sort_spec = default_sort_spec;
if (env.comparison_mode && env.replay_mode) {
fprintf(stderr, "Can't specify replay and comparison mode at the same time!\n\n");
argp_help(&argp, stderr, ARGP_HELP_USAGE, "veristat");
return 1;
}
if (env.comparison_mode)
err = handle_comparison_mode();
else if (env.replay_mode)
err = handle_replay_mode();
else
err = handle_verif_mode();
free_verif_stats(env.prog_stats, env.prog_stat_cnt);
free_verif_stats(env.baseline_stats, env.baseline_stat_cnt);
free(env.join_stats);
for (i = 0; i < env.filename_cnt; i++)
free(env.filenames[i]);
free(env.filenames);
for (i = 0; i < env.allow_filter_cnt; i++) {
free(env.allow_filters[i].any_glob);
free(env.allow_filters[i].file_glob);
free(env.allow_filters[i].prog_glob);
}
free(env.allow_filters);
for (i = 0; i < env.deny_filter_cnt; i++) {
free(env.deny_filters[i].any_glob);
free(env.deny_filters[i].file_glob);
free(env.deny_filters[i].prog_glob);
}
free(env.deny_filters);
return -err;
}
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