Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity
kernel-fxtec-pro1x/tools/perf/util/trace-event-parse.c
Steven Rostedt d06c27b22a perf: Fix parsing of __print_flags() in TP_printk() 
A update is made to the sched:sched_switch event that adds some
logic to the first parameter of the __print_flags() that shows the
state of tasks. This change cause perf to fail parsing the flags.

A simple fix is needed to have the parser be able to process ops
within the argument.

Cc: stable@vger.kernel.org
Reported-by: Andrew Vagin <avagin@openvz.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2011-12-05 13:28:47 -05:00

3145 lines
62 KiB
C
Raw Blame History

/*
* Copyright (C) 2009, Steven Rostedt <srostedt@redhat.com>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License (not later!)
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* The parts for function graph printing was taken and modified from the
* Linux Kernel that were written by Frederic Weisbecker.
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#undef _GNU_SOURCE
#include "../perf.h"
#include "util.h"
#include "trace-event.h"
int header_page_ts_offset;
int header_page_ts_size;
int header_page_size_offset;
int header_page_size_size;
int header_page_overwrite_offset;
int header_page_overwrite_size;
int header_page_data_offset;
int header_page_data_size;
bool latency_format;
static char *input_buf;
static unsigned long long input_buf_ptr;
static unsigned long long input_buf_siz;
static int cpus;
static int long_size;
static int is_flag_field;
static int is_symbolic_field;
static struct format_field *
find_any_field(struct event *event, const char *name);
static void init_input_buf(char *buf, unsigned long long size)
{
input_buf = buf;
input_buf_siz = size;
input_buf_ptr = 0;
}
struct cmdline {
char *comm;
int pid;
};
static struct cmdline *cmdlines;
static int cmdline_count;
static int cmdline_cmp(const void *a, const void *b)
{
const struct cmdline *ca = a;
const struct cmdline *cb = b;
if (ca->pid < cb->pid)
return -1;
if (ca->pid > cb->pid)
return 1;
return 0;
}
void parse_cmdlines(char *file, int size __unused)
{
struct cmdline_list {
struct cmdline_list *next;
char *comm;
int pid;
} *list = NULL, *item;
char *line;
char *next = NULL;
int i;
line = strtok_r(file, "\n", &next);
while (line) {
item = malloc_or_die(sizeof(*item));
sscanf(line, "%d %as", &item->pid,
(float *)(void *)&item->comm); /* workaround gcc warning */
item->next = list;
list = item;
line = strtok_r(NULL, "\n", &next);
cmdline_count++;
}
cmdlines = malloc_or_die(sizeof(*cmdlines) * cmdline_count);
i = 0;
while (list) {
cmdlines[i].pid = list->pid;
cmdlines[i].comm = list->comm;
i++;
item = list;
list = list->next;
free(item);
}
qsort(cmdlines, cmdline_count, sizeof(*cmdlines), cmdline_cmp);
}
static struct func_map {
unsigned long long addr;
char *func;
char *mod;
} *func_list;
static unsigned int func_count;
static int func_cmp(const void *a, const void *b)
{
const struct func_map *fa = a;
const struct func_map *fb = b;
if (fa->addr < fb->addr)
return -1;
if (fa->addr > fb->addr)
return 1;
return 0;
}
void parse_proc_kallsyms(char *file, unsigned int size __unused)
{
struct func_list {
struct func_list *next;
unsigned long long addr;
char *func;
char *mod;
} *list = NULL, *item;
char *line;
char *next = NULL;
char *addr_str;
char ch;
int ret __used;
int i;
line = strtok_r(file, "\n", &next);
while (line) {
item = malloc_or_die(sizeof(*item));
item->mod = NULL;
ret = sscanf(line, "%as %c %as\t[%as",
(float *)(void *)&addr_str, /* workaround gcc warning */
&ch,
(float *)(void *)&item->func,
(float *)(void *)&item->mod);
item->addr = strtoull(addr_str, NULL, 16);
free(addr_str);
/* truncate the extra ']' */
if (item->mod)
item->mod[strlen(item->mod) - 1] = 0;
item->next = list;
list = item;
line = strtok_r(NULL, "\n", &next);
func_count++;
}
func_list = malloc_or_die(sizeof(*func_list) * (func_count + 1));
i = 0;
while (list) {
func_list[i].func = list->func;
func_list[i].addr = list->addr;
func_list[i].mod = list->mod;
i++;
item = list;
list = list->next;
free(item);
}
qsort(func_list, func_count, sizeof(*func_list), func_cmp);
/*
* Add a special record at the end.
*/
func_list[func_count].func = NULL;
func_list[func_count].addr = 0;
func_list[func_count].mod = NULL;
}
/*
* We are searching for a record in between, not an exact
* match.
*/
static int func_bcmp(const void *a, const void *b)
{
const struct func_map *fa = a;
const struct func_map *fb = b;
if ((fa->addr == fb->addr) ||
(fa->addr > fb->addr &&
fa->addr < (fb+1)->addr))
return 0;
if (fa->addr < fb->addr)
return -1;
return 1;
}
static struct func_map *find_func(unsigned long long addr)
{
struct func_map *func;
struct func_map key;
key.addr = addr;
func = bsearch(&key, func_list, func_count, sizeof(*func_list),
func_bcmp);
return func;
}
void print_funcs(void)
{
int i;
for (i = 0; i < (int)func_count; i++) {
printf("%016llx %s",
func_list[i].addr,
func_list[i].func);
if (func_list[i].mod)
printf(" [%s]\n", func_list[i].mod);
else
printf("\n");
}
}
static struct printk_map {
unsigned long long addr;
char *printk;
} *printk_list;
static unsigned int printk_count;
static int printk_cmp(const void *a, const void *b)
{
const struct func_map *fa = a;
const struct func_map *fb = b;
if (fa->addr < fb->addr)
return -1;
if (fa->addr > fb->addr)
return 1;
return 0;
}
static struct printk_map *find_printk(unsigned long long addr)
{
struct printk_map *printk;
struct printk_map key;
key.addr = addr;
printk = bsearch(&key, printk_list, printk_count, sizeof(*printk_list),
printk_cmp);
return printk;
}
void parse_ftrace_printk(char *file, unsigned int size __unused)
{
struct printk_list {
struct printk_list *next;
unsigned long long addr;
char *printk;
} *list = NULL, *item;
char *line;
char *next = NULL;
char *addr_str;
int i;
line = strtok_r(file, "\n", &next);
while (line) {
addr_str = strsep(&line, ":");
if (!line) {
warning("error parsing print strings");
break;
}
item = malloc_or_die(sizeof(*item));
item->addr = strtoull(addr_str, NULL, 16);
/* fmt still has a space, skip it */
item->printk = strdup(line+1);
item->next = list;
list = item;
line = strtok_r(NULL, "\n", &next);
printk_count++;
}
printk_list = malloc_or_die(sizeof(*printk_list) * printk_count + 1);
i = 0;
while (list) {
printk_list[i].printk = list->printk;
printk_list[i].addr = list->addr;
i++;
item = list;
list = list->next;
free(item);
}
qsort(printk_list, printk_count, sizeof(*printk_list), printk_cmp);
}
void print_printk(void)
{
int i;
for (i = 0; i < (int)printk_count; i++) {
printf("%016llx %s\n",
printk_list[i].addr,
printk_list[i].printk);
}
}
static struct event *alloc_event(void)
{
struct event *event;
event = malloc_or_die(sizeof(*event));
memset(event, 0, sizeof(*event));
return event;
}
enum event_type {
EVENT_ERROR,
EVENT_NONE,
EVENT_SPACE,
EVENT_NEWLINE,
EVENT_OP,
EVENT_DELIM,
EVENT_ITEM,
EVENT_DQUOTE,
EVENT_SQUOTE,
};
static struct event *event_list;
static void add_event(struct event *event)
{
event->next = event_list;
event_list = event;
}
static int event_item_type(enum event_type type)
{
switch (type) {
case EVENT_ITEM ... EVENT_SQUOTE:
return 1;
case EVENT_ERROR ... EVENT_DELIM:
default:
return 0;
}
}
static void free_arg(struct print_arg *arg)
{
if (!arg)
return;
switch (arg->type) {
case PRINT_ATOM:
if (arg->atom.atom)
free(arg->atom.atom);
break;
case PRINT_NULL:
case PRINT_FIELD ... PRINT_OP:
default:
/* todo */
break;
}
free(arg);
}
static enum event_type get_type(int ch)
{
if (ch == '\n')
return EVENT_NEWLINE;
if (isspace(ch))
return EVENT_SPACE;
if (isalnum(ch) || ch == '_')
return EVENT_ITEM;
if (ch == '\'')
return EVENT_SQUOTE;
if (ch == '"')
return EVENT_DQUOTE;
if (!isprint(ch))
return EVENT_NONE;
if (ch == '(' || ch == ')' || ch == ',')
return EVENT_DELIM;
return EVENT_OP;
}
static int __read_char(void)
{
if (input_buf_ptr >= input_buf_siz)
return -1;
return input_buf[input_buf_ptr++];
}
static int __peek_char(void)
{
if (input_buf_ptr >= input_buf_siz)
return -1;
return input_buf[input_buf_ptr];
}
static enum event_type __read_token(char **tok)
{
char buf[BUFSIZ];
int ch, last_ch, quote_ch, next_ch;
int i = 0;
int tok_size = 0;
enum event_type type;
*tok = NULL;
ch = __read_char();
if (ch < 0)
return EVENT_NONE;
type = get_type(ch);
if (type == EVENT_NONE)
return type;
buf[i++] = ch;
switch (type) {
case EVENT_NEWLINE:
case EVENT_DELIM:
*tok = malloc_or_die(2);
(*tok)[0] = ch;
(*tok)[1] = 0;
return type;
case EVENT_OP:
switch (ch) {
case '-':
next_ch = __peek_char();
if (next_ch == '>') {
buf[i++] = __read_char();
break;
}
/* fall through */
case '+':
case '|':
case '&':
case '>':
case '<':
last_ch = ch;
ch = __peek_char();
if (ch != last_ch)
goto test_equal;
buf[i++] = __read_char();
switch (last_ch) {
case '>':
case '<':
goto test_equal;
default:
break;
}
break;
case '!':
case '=':
goto test_equal;
default: /* what should we do instead? */
break;
}
buf[i] = 0;
*tok = strdup(buf);
return type;
test_equal:
ch = __peek_char();
if (ch == '=')
buf[i++] = __read_char();
break;
case EVENT_DQUOTE:
case EVENT_SQUOTE:
/* don't keep quotes */
i--;
quote_ch = ch;
last_ch = 0;
do {
if (i == (BUFSIZ - 1)) {
buf[i] = 0;
if (*tok) {
*tok = realloc(*tok, tok_size + BUFSIZ);
if (!*tok)
return EVENT_NONE;
strcat(*tok, buf);
} else
*tok = strdup(buf);
if (!*tok)
return EVENT_NONE;
tok_size += BUFSIZ;
i = 0;
}
last_ch = ch;
ch = __read_char();
buf[i++] = ch;
/* the '\' '\' will cancel itself */
if (ch == '\\' && last_ch == '\\')
last_ch = 0;
} while (ch != quote_ch || last_ch == '\\');
/* remove the last quote */
i--;
goto out;
case EVENT_ERROR ... EVENT_SPACE:
case EVENT_ITEM:
default:
break;
}
while (get_type(__peek_char()) == type) {
if (i == (BUFSIZ - 1)) {
buf[i] = 0;
if (*tok) {
*tok = realloc(*tok, tok_size + BUFSIZ);
if (!*tok)
return EVENT_NONE;
strcat(*tok, buf);
} else
*tok = strdup(buf);
if (!*tok)
return EVENT_NONE;
tok_size += BUFSIZ;
i = 0;
}
ch = __read_char();
buf[i++] = ch;
}
out:
buf[i] = 0;
if (*tok) {
*tok = realloc(*tok, tok_size + i);
if (!*tok)
return EVENT_NONE;
strcat(*tok, buf);
} else
*tok = strdup(buf);
if (!*tok)
return EVENT_NONE;
return type;
}
static void free_token(char *tok)
{
if (tok)
free(tok);
}
static enum event_type read_token(char **tok)
{
enum event_type type;
for (;;) {
type = __read_token(tok);
if (type != EVENT_SPACE)
return type;
free_token(*tok);
}
/* not reached */
return EVENT_NONE;
}
/* no newline */
static enum event_type read_token_item(char **tok)
{
enum event_type type;
for (;;) {
type = __read_token(tok);
if (type != EVENT_SPACE && type != EVENT_NEWLINE)
return type;
free_token(*tok);
}
/* not reached */
return EVENT_NONE;
}
static int test_type(enum event_type type, enum event_type expect)
{
if (type != expect) {
warning("Error: expected type %d but read %d",
expect, type);
return -1;
}
return 0;
}
static int __test_type_token(enum event_type type, char *token,
enum event_type expect, const char *expect_tok,
bool warn)
{
if (type != expect) {
if (warn)
warning("Error: expected type %d but read %d",
expect, type);
return -1;
}
if (strcmp(token, expect_tok) != 0) {
if (warn)
warning("Error: expected '%s' but read '%s'",
expect_tok, token);
return -1;
}
return 0;
}
static int test_type_token(enum event_type type, char *token,
enum event_type expect, const char *expect_tok)
{
return __test_type_token(type, token, expect, expect_tok, true);
}
static int __read_expect_type(enum event_type expect, char **tok, int newline_ok)
{
enum event_type type;
if (newline_ok)
type = read_token(tok);
else
type = read_token_item(tok);
return test_type(type, expect);
}
static int read_expect_type(enum event_type expect, char **tok)
{
return __read_expect_type(expect, tok, 1);
}
static int __read_expected(enum event_type expect, const char *str,
int newline_ok, bool warn)
{
enum event_type type;
char *token;
int ret;
if (newline_ok)
type = read_token(&token);
else
type = read_token_item(&token);
ret = __test_type_token(type, token, expect, str, warn);
free_token(token);
return ret;
}
static int read_expected(enum event_type expect, const char *str)
{
return __read_expected(expect, str, 1, true);
}
static int read_expected_item(enum event_type expect, const char *str)
{
return __read_expected(expect, str, 0, true);
}
static char *event_read_name(void)
{
char *token;
if (read_expected(EVENT_ITEM, "name") < 0)
return NULL;
if (read_expected(EVENT_OP, ":") < 0)
return NULL;
if (read_expect_type(EVENT_ITEM, &token) < 0)
goto fail;
return token;
fail:
free_token(token);
return NULL;
}
static int event_read_id(void)
{
char *token;
int id;
if (read_expected_item(EVENT_ITEM, "ID") < 0)
return -1;
if (read_expected(EVENT_OP, ":") < 0)
return -1;
if (read_expect_type(EVENT_ITEM, &token) < 0)
goto fail;
id = strtoul(token, NULL, 0);
free_token(token);
return id;
fail:
free_token(token);
return -1;
}
static int field_is_string(struct format_field *field)
{
if ((field->flags & FIELD_IS_ARRAY) &&
(!strstr(field->type, "char") || !strstr(field->type, "u8") ||
!strstr(field->type, "s8")))
return 1;
return 0;
}
static int field_is_dynamic(struct format_field *field)
{
if (!strncmp(field->type, "__data_loc", 10))
return 1;
return 0;
}
static int event_read_fields(struct event *event, struct format_field **fields)
{
struct format_field *field = NULL;
enum event_type type;
char *token;
char *last_token;
int count = 0;
do {
type = read_token(&token);
if (type == EVENT_NEWLINE) {
free_token(token);
return count;
}
count++;
if (test_type_token(type, token, EVENT_ITEM, "field"))
goto fail;
free_token(token);
type = read_token(&token);
/*
* The ftrace fields may still use the "special" name.
* Just ignore it.
*/
if (event->flags & EVENT_FL_ISFTRACE &&
type == EVENT_ITEM && strcmp(token, "special") == 0) {
free_token(token);
type = read_token(&token);
}
if (test_type_token(type, token, EVENT_OP, ":") < 0)
return -1;
if (read_expect_type(EVENT_ITEM, &token) < 0)
goto fail;
last_token = token;
field = malloc_or_die(sizeof(*field));
memset(field, 0, sizeof(*field));
/* read the rest of the type */
for (;;) {
type = read_token(&token);
if (type == EVENT_ITEM ||
(type == EVENT_OP && strcmp(token, "*") == 0) ||
/*
* Some of the ftrace fields are broken and have
* an illegal "." in them.
*/
(event->flags & EVENT_FL_ISFTRACE &&
type == EVENT_OP && strcmp(token, ".") == 0)) {
if (strcmp(token, "*") == 0)
field->flags |= FIELD_IS_POINTER;
if (field->type) {
field->type = realloc(field->type,
strlen(field->type) +
strlen(last_token) + 2);
strcat(field->type, " ");
strcat(field->type, last_token);
} else
field->type = last_token;
last_token = token;
continue;
}
break;
}
if (!field->type) {
die("no type found");
goto fail;
}
field->name = last_token;
if (test_type(type, EVENT_OP))
goto fail;
if (strcmp(token, "[") == 0) {
enum event_type last_type = type;
char *brackets = token;
int len;
field->flags |= FIELD_IS_ARRAY;
type = read_token(&token);
while (strcmp(token, "]") != 0) {
if (last_type == EVENT_ITEM &&
type == EVENT_ITEM)
len = 2;
else
len = 1;
last_type = type;
brackets = realloc(brackets,
strlen(brackets) +
strlen(token) + len);
if (len == 2)
strcat(brackets, " ");
strcat(brackets, token);
free_token(token);
type = read_token(&token);
if (type == EVENT_NONE) {
die("failed to find token");
goto fail;
}
}
free_token(token);
brackets = realloc(brackets, strlen(brackets) + 2);
strcat(brackets, "]");
/* add brackets to type */
type = read_token(&token);
/*
* If the next token is not an OP, then it is of
* the format: type [] item;
*/
if (type == EVENT_ITEM) {
field->type = realloc(field->type,
strlen(field->type) +
strlen(field->name) +
strlen(brackets) + 2);
strcat(field->type, " ");
strcat(field->type, field->name);
free_token(field->name);
strcat(field->type, brackets);
field->name = token;
type = read_token(&token);
} else {
field->type = realloc(field->type,
strlen(field->type) +
strlen(brackets) + 1);
strcat(field->type, brackets);
}
free(brackets);
}
if (field_is_string(field)) {
field->flags |= FIELD_IS_STRING;
if (field_is_dynamic(field))
field->flags |= FIELD_IS_DYNAMIC;
}
if (test_type_token(type, token, EVENT_OP, ";"))
goto fail;
free_token(token);
if (read_expected(EVENT_ITEM, "offset") < 0)
goto fail_expect;
if (read_expected(EVENT_OP, ":") < 0)
goto fail_expect;
if (read_expect_type(EVENT_ITEM, &token))
goto fail;
field->offset = strtoul(token, NULL, 0);
free_token(token);
if (read_expected(EVENT_OP, ";") < 0)
goto fail_expect;
if (read_expected(EVENT_ITEM, "size") < 0)
goto fail_expect;
if (read_expected(EVENT_OP, ":") < 0)
goto fail_expect;
if (read_expect_type(EVENT_ITEM, &token))
goto fail;
field->size = strtoul(token, NULL, 0);
free_token(token);
if (read_expected(EVENT_OP, ";") < 0)
goto fail_expect;
type = read_token(&token);
if (type != EVENT_NEWLINE) {
/* newer versions of the kernel have a "signed" type */
if (test_type_token(type, token, EVENT_ITEM, "signed"))
goto fail;
free_token(token);
if (read_expected(EVENT_OP, ":") < 0)
goto fail_expect;
if (read_expect_type(EVENT_ITEM, &token))
goto fail;
if (strtoul(token, NULL, 0))
field->flags |= FIELD_IS_SIGNED;
free_token(token);
if (read_expected(EVENT_OP, ";") < 0)
goto fail_expect;
if (read_expect_type(EVENT_NEWLINE, &token))
goto fail;
}
free_token(token);
*fields = field;
fields = &field->next;
} while (1);
return 0;
fail:
free_token(token);
fail_expect:
if (field)
free(field);
return -1;
}
static int event_read_format(struct event *event)
{
char *token;
int ret;
if (read_expected_item(EVENT_ITEM, "format") < 0)
return -1;
if (read_expected(EVENT_OP, ":") < 0)
return -1;
if (read_expect_type(EVENT_NEWLINE, &token))
goto fail;
free_token(token);
ret = event_read_fields(event, &event->format.common_fields);
if (ret < 0)
return ret;
event->format.nr_common = ret;
ret = event_read_fields(event, &event->format.fields);
if (ret < 0)
return ret;
event->format.nr_fields = ret;
return 0;
fail:
free_token(token);
return -1;
}
enum event_type
process_arg_token(struct event *event, struct print_arg *arg,
char **tok, enum event_type type);
static enum event_type
process_arg(struct event *event, struct print_arg *arg, char **tok)
{
enum event_type type;
char *token;
type = read_token(&token);
*tok = token;
return process_arg_token(event, arg, tok, type);
}
static enum event_type
process_cond(struct event *event, struct print_arg *top, char **tok)
{
struct print_arg *arg, *left, *right;
enum event_type type;
char *token = NULL;
arg = malloc_or_die(sizeof(*arg));
memset(arg, 0, sizeof(*arg));
left = malloc_or_die(sizeof(*left));
right = malloc_or_die(sizeof(*right));
arg->type = PRINT_OP;
arg->op.left = left;
arg->op.right = right;
*tok = NULL;
type = process_arg(event, left, &token);
if (test_type_token(type, token, EVENT_OP, ":"))
goto out_free;
arg->op.op = token;
type = process_arg(event, right, &token);
top->op.right = arg;
*tok = token;
return type;
out_free:
free_token(*tok);
free(right);
free(left);
free_arg(arg);
return EVENT_ERROR;
}
static enum event_type
process_array(struct event *event, struct print_arg *top, char **tok)
{
struct print_arg *arg;
enum event_type type;
char *token = NULL;
arg = malloc_or_die(sizeof(*arg));
memset(arg, 0, sizeof(*arg));
*tok = NULL;
type = process_arg(event, arg, &token);
if (test_type_token(type, token, EVENT_OP, "]"))
goto out_free;
top->op.right = arg;
free_token(token);
type = read_token_item(&token);
*tok = token;
return type;
out_free:
free_token(*tok);
free_arg(arg);
return EVENT_ERROR;
}
static int get_op_prio(char *op)
{
if (!op[1]) {
switch (op[0]) {
case '*':
case '/':
case '%':
return 6;
case '+':
case '-':
return 7;
/* '>>' and '<<' are 8 */
case '<':
case '>':
return 9;
/* '==' and '!=' are 10 */
case '&':
return 11;
case '^':
return 12;
case '|':
return 13;
case '?':
return 16;
default:
die("unknown op '%c'", op[0]);
return -1;
}
} else {
if (strcmp(op, "++") == 0 ||
strcmp(op, "--") == 0) {
return 3;
} else if (strcmp(op, ">>") == 0 ||
strcmp(op, "<<") == 0) {
return 8;
} else if (strcmp(op, ">=") == 0 ||
strcmp(op, "<=") == 0) {
return 9;
} else if (strcmp(op, "==") == 0 ||
strcmp(op, "!=") == 0) {
return 10;
} else if (strcmp(op, "&&") == 0) {
return 14;
} else if (strcmp(op, "||") == 0) {
return 15;
} else {
die("unknown op '%s'", op);
return -1;
}
}
}
static void set_op_prio(struct print_arg *arg)
{
/* single ops are the greatest */
if (!arg->op.left || arg->op.left->type == PRINT_NULL) {
arg->op.prio = 0;
return;
}
arg->op.prio = get_op_prio(arg->op.op);
}
static enum event_type
process_op(struct event *event, struct print_arg *arg, char **tok)
{
struct print_arg *left, *right = NULL;
enum event_type type;
char *token;
/* the op is passed in via tok */
token = *tok;
if (arg->type == PRINT_OP && !arg->op.left) {
/* handle single op */
if (token[1]) {
die("bad op token %s", token);
return EVENT_ERROR;
}
switch (token[0]) {
case '!':
case '+':
case '-':
break;
default:
die("bad op token %s", token);
return EVENT_ERROR;
}
/* make an empty left */
left = malloc_or_die(sizeof(*left));
left->type = PRINT_NULL;
arg->op.left = left;
right = malloc_or_die(sizeof(*right));
arg->op.right = right;
type = process_arg(event, right, tok);
} else if (strcmp(token, "?") == 0) {
left = malloc_or_die(sizeof(*left));
/* copy the top arg to the left */
*left = *arg;
arg->type = PRINT_OP;
arg->op.op = token;
arg->op.left = left;
arg->op.prio = 0;
type = process_cond(event, arg, tok);
} else if (strcmp(token, ">>") == 0 ||
strcmp(token, "<<") == 0 ||
strcmp(token, "&") == 0 ||
strcmp(token, "|") == 0 ||
strcmp(token, "&&") == 0 ||
strcmp(token, "||") == 0 ||
strcmp(token, "-") == 0 ||
strcmp(token, "+") == 0 ||
strcmp(token, "*") == 0 ||
strcmp(token, "^") == 0 ||
strcmp(token, "/") == 0 ||
strcmp(token, "<") == 0 ||
strcmp(token, ">") == 0 ||
strcmp(token, "==") == 0 ||
strcmp(token, "!=") == 0) {
left = malloc_or_die(sizeof(*left));
/* copy the top arg to the left */
*left = *arg;
arg->type = PRINT_OP;
arg->op.op = token;
arg->op.left = left;
set_op_prio(arg);
right = malloc_or_die(sizeof(*right));
type = read_token_item(&token);
*tok = token;
/* could just be a type pointer */
if ((strcmp(arg->op.op, "*") == 0) &&
type == EVENT_DELIM && (strcmp(token, ")") == 0)) {
if (left->type != PRINT_ATOM)
die("bad pointer type");
left->atom.atom = realloc(left->atom.atom,
sizeof(left->atom.atom) + 3);
strcat(left->atom.atom, " *");
*arg = *left;
free(arg);
return type;
}
type = process_arg_token(event, right, tok, type);
arg->op.right = right;
} else if (strcmp(token, "[") == 0) {
left = malloc_or_die(sizeof(*left));
*left = *arg;
arg->type = PRINT_OP;
arg->op.op = token;
arg->op.left = left;
arg->op.prio = 0;
type = process_array(event, arg, tok);
} else {
warning("unknown op '%s'", token);
event->flags |= EVENT_FL_FAILED;
/* the arg is now the left side */
return EVENT_NONE;
}
if (type == EVENT_OP) {
int prio;
/* higher prios need to be closer to the root */
prio = get_op_prio(*tok);
if (prio > arg->op.prio)
return process_op(event, arg, tok);
return process_op(event, right, tok);
}
return type;
}
static enum event_type
process_entry(struct event *event __unused, struct print_arg *arg,
char **tok)
{
enum event_type type;
char *field;
char *token;
if (read_expected(EVENT_OP, "->") < 0)
return EVENT_ERROR;
if (read_expect_type(EVENT_ITEM, &token) < 0)
goto fail;
field = token;
arg->type = PRINT_FIELD;
arg->field.name = field;
if (is_flag_field) {
arg->field.field = find_any_field(event, arg->field.name);
arg->field.field->flags |= FIELD_IS_FLAG;
is_flag_field = 0;
} else if (is_symbolic_field) {
arg->field.field = find_any_field(event, arg->field.name);
arg->field.field->flags |= FIELD_IS_SYMBOLIC;
is_symbolic_field = 0;
}
type = read_token(&token);
*tok = token;
return type;
fail:
free_token(token);
return EVENT_ERROR;
}
static char *arg_eval (struct print_arg *arg);
static long long arg_num_eval(struct print_arg *arg)
{
long long left, right;
long long val = 0;
switch (arg->type) {
case PRINT_ATOM:
val = strtoll(arg->atom.atom, NULL, 0);
break;
case PRINT_TYPE:
val = arg_num_eval(arg->typecast.item);
break;
case PRINT_OP:
switch (arg->op.op[0]) {
case '|':
left = arg_num_eval(arg->op.left);
right = arg_num_eval(arg->op.right);
if (arg->op.op[1])
val = left || right;
else
val = left | right;
break;
case '&':
left = arg_num_eval(arg->op.left);
right = arg_num_eval(arg->op.right);
if (arg->op.op[1])
val = left && right;
else
val = left & right;
break;
case '<':
left = arg_num_eval(arg->op.left);
right = arg_num_eval(arg->op.right);
switch (arg->op.op[1]) {
case 0:
val = left < right;
break;
case '<':
val = left << right;
break;
case '=':
val = left <= right;
break;
default:
die("unknown op '%s'", arg->op.op);
}
break;
case '>':
left = arg_num_eval(arg->op.left);
right = arg_num_eval(arg->op.right);
switch (arg->op.op[1]) {
case 0:
val = left > right;
break;
case '>':
val = left >> right;
break;
case '=':
val = left >= right;
break;
default:
die("unknown op '%s'", arg->op.op);
}
break;
case '=':
left = arg_num_eval(arg->op.left);
right = arg_num_eval(arg->op.right);
if (arg->op.op[1] != '=')
die("unknown op '%s'", arg->op.op);
val = left == right;
break;
case '!':
left = arg_num_eval(arg->op.left);
right = arg_num_eval(arg->op.right);
switch (arg->op.op[1]) {
case '=':
val = left != right;
break;
default:
die("unknown op '%s'", arg->op.op);
}
break;
default:
die("unknown op '%s'", arg->op.op);
}
break;
case PRINT_NULL:
case PRINT_FIELD ... PRINT_SYMBOL:
case PRINT_STRING:
default:
die("invalid eval type %d", arg->type);
}
return val;
}
static char *arg_eval (struct print_arg *arg)
{
long long val;
static char buf[20];
switch (arg->type) {
case PRINT_ATOM:
return arg->atom.atom;
case PRINT_TYPE:
return arg_eval(arg->typecast.item);
case PRINT_OP:
val = arg_num_eval(arg);
sprintf(buf, "%lld", val);
return buf;
case PRINT_NULL:
case PRINT_FIELD ... PRINT_SYMBOL:
case PRINT_STRING:
default:
die("invalid eval type %d", arg->type);
break;
}
return NULL;
}
static enum event_type
process_fields(struct event *event, struct print_flag_sym **list, char **tok)
{
enum event_type type;
struct print_arg *arg = NULL;
struct print_flag_sym *field;
char *token = NULL;
char *value;
do {
free_token(token);
type = read_token_item(&token);
if (test_type_token(type, token, EVENT_OP, "{"))
break;
arg = malloc_or_die(sizeof(*arg));
free_token(token);
type = process_arg(event, arg, &token);
if (test_type_token(type, token, EVENT_DELIM, ","))
goto out_free;
field = malloc_or_die(sizeof(*field));
memset(field, 0, sizeof(*field));
value = arg_eval(arg);
field->value = strdup(value);
free_token(token);
type = process_arg(event, arg, &token);
if (test_type_token(type, token, EVENT_OP, "}"))
goto out_free;
value = arg_eval(arg);
field->str = strdup(value);
free_arg(arg);
arg = NULL;
*list = field;
list = &field->next;
free_token(token);
type = read_token_item(&token);
} while (type == EVENT_DELIM && strcmp(token, ",") == 0);
*tok = token;
return type;
out_free:
free_arg(arg);
free_token(token);
return EVENT_ERROR;
}
static enum event_type
process_flags(struct event *event, struct print_arg *arg, char **tok)
{
struct print_arg *field;
enum event_type type;
char *token;
memset(arg, 0, sizeof(*arg));
arg->type = PRINT_FLAGS;
if (read_expected_item(EVENT_DELIM, "(") < 0)
return EVENT_ERROR;
field = malloc_or_die(sizeof(*field));
type = process_arg(event, field, &token);
while (type == EVENT_OP)
type = process_op(event, field, &token);
if (test_type_token(type, token, EVENT_DELIM, ","))
goto out_free;
arg->flags.field = field;
type = read_token_item(&token);
if (event_item_type(type)) {
arg->flags.delim = token;
type = read_token_item(&token);
}
if (test_type_token(type, token, EVENT_DELIM, ","))
goto out_free;
type = process_fields(event, &arg->flags.flags, &token);
if (test_type_token(type, token, EVENT_DELIM, ")"))
goto out_free;
free_token(token);
type = read_token_item(tok);
return type;
out_free:
free_token(token);
return EVENT_ERROR;
}
static enum event_type
process_symbols(struct event *event, struct print_arg *arg, char **tok)
{
struct print_arg *field;
enum event_type type;
char *token;
memset(arg, 0, sizeof(*arg));
arg->type = PRINT_SYMBOL;
if (read_expected_item(EVENT_DELIM, "(") < 0)
return EVENT_ERROR;
field = malloc_or_die(sizeof(*field));
type = process_arg(event, field, &token);
if (test_type_token(type, token, EVENT_DELIM, ","))
goto out_free;
arg->symbol.field = field;
type = process_fields(event, &arg->symbol.symbols, &token);
if (test_type_token(type, token, EVENT_DELIM, ")"))
goto out_free;
free_token(token);
type = read_token_item(tok);
return type;
out_free:
free_token(token);
return EVENT_ERROR;
}
static enum event_type
process_paren(struct event *event, struct print_arg *arg, char **tok)
{
struct print_arg *item_arg;
enum event_type type;
char *token;
type = process_arg(event, arg, &token);
if (type == EVENT_ERROR)
return EVENT_ERROR;
if (type == EVENT_OP)
type = process_op(event, arg, &token);
if (type == EVENT_ERROR)
return EVENT_ERROR;
if (test_type_token(type, token, EVENT_DELIM, ")")) {
free_token(token);
return EVENT_ERROR;
}
free_token(token);
type = read_token_item(&token);
/*
* If the next token is an item or another open paren, then
* this was a typecast.
*/
if (event_item_type(type) ||
(type == EVENT_DELIM && strcmp(token, "(") == 0)) {
/* make this a typecast and contine */
/* prevous must be an atom */
if (arg->type != PRINT_ATOM)
die("previous needed to be PRINT_ATOM");
item_arg = malloc_or_die(sizeof(*item_arg));
arg->type = PRINT_TYPE;
arg->typecast.type = arg->atom.atom;
arg->typecast.item = item_arg;
type = process_arg_token(event, item_arg, &token, type);
}
*tok = token;
return type;
}
static enum event_type
process_str(struct event *event __unused, struct print_arg *arg, char **tok)
{
enum event_type type;
char *token;
if (read_expected(EVENT_DELIM, "(") < 0)
return EVENT_ERROR;
if (read_expect_type(EVENT_ITEM, &token) < 0)
goto fail;
arg->type = PRINT_STRING;
arg->string.string = token;
arg->string.offset = -1;
if (read_expected(EVENT_DELIM, ")") < 0)
return EVENT_ERROR;
type = read_token(&token);
*tok = token;
return type;
fail:
free_token(token);
return EVENT_ERROR;
}
enum event_type
process_arg_token(struct event *event, struct print_arg *arg,
char **tok, enum event_type type)
{
char *token;
char *atom;
token = *tok;
switch (type) {
case EVENT_ITEM:
if (strcmp(token, "REC") == 0) {
free_token(token);
type = process_entry(event, arg, &token);
} else if (strcmp(token, "__print_flags") == 0) {
free_token(token);
is_flag_field = 1;
type = process_flags(event, arg, &token);
} else if (strcmp(token, "__print_symbolic") == 0) {
free_token(token);
is_symbolic_field = 1;
type = process_symbols(event, arg, &token);
} else if (strcmp(token, "__get_str") == 0) {
free_token(token);
type = process_str(event, arg, &token);
} else {
atom = token;
/* test the next token */
type = read_token_item(&token);
/* atoms can be more than one token long */
while (type == EVENT_ITEM) {
atom = realloc(atom, strlen(atom) + strlen(token) + 2);
strcat(atom, " ");
strcat(atom, token);
free_token(token);
type = read_token_item(&token);
}
/* todo, test for function */
arg->type = PRINT_ATOM;
arg->atom.atom = atom;
}
break;
case EVENT_DQUOTE:
case EVENT_SQUOTE:
arg->type = PRINT_ATOM;
arg->atom.atom = token;
type = read_token_item(&token);
break;
case EVENT_DELIM:
if (strcmp(token, "(") == 0) {
free_token(token);
type = process_paren(event, arg, &token);
break;
}
case EVENT_OP:
/* handle single ops */
arg->type = PRINT_OP;
arg->op.op = token;
arg->op.left = NULL;
type = process_op(event, arg, &token);
break;
case EVENT_ERROR ... EVENT_NEWLINE:
default:
die("unexpected type %d", type);
}
*tok = token;
return type;
}
static int event_read_print_args(struct event *event, struct print_arg **list)
{
enum event_type type = EVENT_ERROR;
struct print_arg *arg;
char *token;
int args = 0;
do {
if (type == EVENT_NEWLINE) {
free_token(token);
type = read_token_item(&token);
continue;
}
arg = malloc_or_die(sizeof(*arg));
memset(arg, 0, sizeof(*arg));
type = process_arg(event, arg, &token);
if (type == EVENT_ERROR) {
free_arg(arg);
return -1;
}
*list = arg;
args++;
if (type == EVENT_OP) {
type = process_op(event, arg, &token);
list = &arg->next;
continue;
}
if (type == EVENT_DELIM && strcmp(token, ",") == 0) {
free_token(token);
*list = arg;
list = &arg->next;
continue;
}
break;
} while (type != EVENT_NONE);
if (type != EVENT_NONE)
free_token(token);
return args;
}
static int event_read_print(struct event *event)
{
enum event_type type;
char *token;
int ret;
if (read_expected_item(EVENT_ITEM, "print") < 0)
return -1;
if (read_expected(EVENT_ITEM, "fmt") < 0)
return -1;
if (read_expected(EVENT_OP, ":") < 0)
return -1;
if (read_expect_type(EVENT_DQUOTE, &token) < 0)
goto fail;
concat:
event->print_fmt.format = token;
event->print_fmt.args = NULL;
/* ok to have no arg */
type = read_token_item(&token);
if (type == EVENT_NONE)
return 0;
/* Handle concatination of print lines */
if (type == EVENT_DQUOTE) {
char *cat;
cat = malloc_or_die(strlen(event->print_fmt.format) +
strlen(token) + 1);
strcpy(cat, event->print_fmt.format);
strcat(cat, token);
free_token(token);
free_token(event->print_fmt.format);
event->print_fmt.format = NULL;
token = cat;
goto concat;
}
if (test_type_token(type, token, EVENT_DELIM, ","))
goto fail;
free_token(token);
ret = event_read_print_args(event, &event->print_fmt.args);
if (ret < 0)
return -1;
return ret;
fail:
free_token(token);
return -1;
}
static struct format_field *
find_common_field(struct event *event, const char *name)
{
struct format_field *format;
for (format = event->format.common_fields;
format; format = format->next) {
if (strcmp(format->name, name) == 0)
break;
}
return format;
}
static struct format_field *
find_field(struct event *event, const char *name)
{
struct format_field *format;
for (format = event->format.fields;
format; format = format->next) {
if (strcmp(format->name, name) == 0)
break;
}
return format;
}
static struct format_field *
find_any_field(struct event *event, const char *name)
{
struct format_field *format;
format = find_common_field(event, name);
if (format)
return format;
return find_field(event, name);
}
unsigned long long read_size(void *ptr, int size)
{
switch (size) {
case 1:
return *(unsigned char *)ptr;
case 2:
return data2host2(ptr);
case 4:
return data2host4(ptr);
case 8:
return data2host8(ptr);
default:
/* BUG! */
return 0;
}
}
unsigned long long
raw_field_value(struct event *event, const char *name, void *data)
{
struct format_field *field;
field = find_any_field(event, name);
if (!field)
return 0ULL;
return read_size(data + field->offset, field->size);
}
void *raw_field_ptr(struct event *event, const char *name, void *data)
{
struct format_field *field;
field = find_any_field(event, name);
if (!field)
return NULL;
if (field->flags & FIELD_IS_DYNAMIC) {
int offset;
offset = *(int *)(data + field->offset);
offset &= 0xffff;
return data + offset;
}
return data + field->offset;
}
static int get_common_info(const char *type, int *offset, int *size)
{
struct event *event;
struct format_field *field;
/*
* All events should have the same common elements.
* Pick any event to find where the type is;
*/
if (!event_list)
die("no event_list!");
event = event_list;
field = find_common_field(event, type);
if (!field)
die("field '%s' not found", type);
*offset = field->offset;
*size = field->size;
return 0;
}
static int __parse_common(void *data, int *size, int *offset,
const char *name)
{
int ret;
if (!*size) {
ret = get_common_info(name, offset, size);
if (ret < 0)
return ret;
}
return read_size(data + *offset, *size);
}
int trace_parse_common_type(void *data)
{
static int type_offset;
static int type_size;
return __parse_common(data, &type_size, &type_offset,
"common_type");
}
int trace_parse_common_pid(void *data)
{
static int pid_offset;
static int pid_size;
return __parse_common(data, &pid_size, &pid_offset,
"common_pid");
}
int parse_common_pc(void *data)
{
static int pc_offset;
static int pc_size;
return __parse_common(data, &pc_size, &pc_offset,
"common_preempt_count");
}
int parse_common_flags(void *data)
{
static int flags_offset;
static int flags_size;
return __parse_common(data, &flags_size, &flags_offset,
"common_flags");
}
int parse_common_lock_depth(void *data)
{
static int ld_offset;
static int ld_size;
int ret;
ret = __parse_common(data, &ld_size, &ld_offset,
"common_lock_depth");
if (ret < 0)
return -1;
return ret;
}
struct event *trace_find_event(int id)
{
struct event *event;
for (event = event_list; event; event = event->next) {
if (event->id == id)
break;
}
return event;
}
struct event *trace_find_next_event(struct event *event)
{
if (!event)
return event_list;
return event->next;
}
static unsigned long long eval_num_arg(void *data, int size,
struct event *event, struct print_arg *arg)
{
unsigned long long val = 0;
unsigned long long left, right;
struct print_arg *larg;
switch (arg->type) {
case PRINT_NULL:
/* ?? */
return 0;
case PRINT_ATOM:
return strtoull(arg->atom.atom, NULL, 0);
case PRINT_FIELD:
if (!arg->field.field) {
arg->field.field = find_any_field(event, arg->field.name);
if (!arg->field.field)
die("field %s not found", arg->field.name);
}
/* must be a number */
val = read_size(data + arg->field.field->offset,
arg->field.field->size);
break;
case PRINT_FLAGS:
case PRINT_SYMBOL:
break;
case PRINT_TYPE:
return eval_num_arg(data, size, event, arg->typecast.item);
case PRINT_STRING:
return 0;
break;
case PRINT_OP:
if (strcmp(arg->op.op, "[") == 0) {
/*
* Arrays are special, since we don't want
* to read the arg as is.
*/
if (arg->op.left->type != PRINT_FIELD)
goto default_op; /* oops, all bets off */
larg = arg->op.left;
if (!larg->field.field) {
larg->field.field =
find_any_field(event, larg->field.name);
if (!larg->field.field)
die("field %s not found", larg->field.name);
}
right = eval_num_arg(data, size, event, arg->op.right);
val = read_size(data + larg->field.field->offset +
right * long_size, long_size);
break;
}
default_op:
left = eval_num_arg(data, size, event, arg->op.left);
right = eval_num_arg(data, size, event, arg->op.right);
switch (arg->op.op[0]) {
case '|':
if (arg->op.op[1])
val = left || right;
else
val = left | right;
break;
case '&':
if (arg->op.op[1])
val = left && right;
else
val = left & right;
break;
case '<':
switch (arg->op.op[1]) {
case 0:
val = left < right;
break;
case '<':
val = left << right;
break;
case '=':
val = left <= right;
break;
default:
die("unknown op '%s'", arg->op.op);
}
break;
case '>':
switch (arg->op.op[1]) {
case 0:
val = left > right;
break;
case '>':
val = left >> right;
break;
case '=':
val = left >= right;
break;
default:
die("unknown op '%s'", arg->op.op);
}
break;
case '=':
if (arg->op.op[1] != '=')
die("unknown op '%s'", arg->op.op);
val = left == right;
break;
case '-':
val = left - right;
break;
case '+':
val = left + right;
break;
default:
die("unknown op '%s'", arg->op.op);
}
break;
default: /* not sure what to do there */
return 0;
}
return val;
}
struct flag {
const char *name;
unsigned long long value;
};
static const struct flag flags[] = {
{ "HI_SOFTIRQ", 0 },
{ "TIMER_SOFTIRQ", 1 },
{ "NET_TX_SOFTIRQ", 2 },
{ "NET_RX_SOFTIRQ", 3 },
{ "BLOCK_SOFTIRQ", 4 },
{ "BLOCK_IOPOLL_SOFTIRQ", 5 },
{ "TASKLET_SOFTIRQ", 6 },
{ "SCHED_SOFTIRQ", 7 },
{ "HRTIMER_SOFTIRQ", 8 },
{ "RCU_SOFTIRQ", 9 },
{ "HRTIMER_NORESTART", 0 },
{ "HRTIMER_RESTART", 1 },
};
unsigned long long eval_flag(const char *flag)
{
int i;
/*
* Some flags in the format files do not get converted.
* If the flag is not numeric, see if it is something that
* we already know about.
*/
if (isdigit(flag[0]))
return strtoull(flag, NULL, 0);
for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
if (strcmp(flags[i].name, flag) == 0)
return flags[i].value;
return 0;
}
static void print_str_arg(void *data, int size,
struct event *event, struct print_arg *arg)
{
struct print_flag_sym *flag;
unsigned long long val, fval;
char *str;
int print;
switch (arg->type) {
case PRINT_NULL:
/* ?? */
return;
case PRINT_ATOM:
printf("%s", arg->atom.atom);
return;
case PRINT_FIELD:
if (!arg->field.field) {
arg->field.field = find_any_field(event, arg->field.name);
if (!arg->field.field)
die("field %s not found", arg->field.name);
}
str = malloc_or_die(arg->field.field->size + 1);
memcpy(str, data + arg->field.field->offset,
arg->field.field->size);
str[arg->field.field->size] = 0;
printf("%s", str);
free(str);
break;
case PRINT_FLAGS:
val = eval_num_arg(data, size, event, arg->flags.field);
print = 0;
for (flag = arg->flags.flags; flag; flag = flag->next) {
fval = eval_flag(flag->value);
if (!val && !fval) {
printf("%s", flag->str);
break;
}
if (fval && (val & fval) == fval) {
if (print && arg->flags.delim)
printf("%s", arg->flags.delim);
printf("%s", flag->str);
print = 1;
val &= ~fval;
}
}
break;
case PRINT_SYMBOL:
val = eval_num_arg(data, size, event, arg->symbol.field);
for (flag = arg->symbol.symbols; flag; flag = flag->next) {
fval = eval_flag(flag->value);
if (val == fval) {
printf("%s", flag->str);
break;
}
}
break;
case PRINT_TYPE:
break;
case PRINT_STRING: {
int str_offset;
if (arg->string.offset == -1) {
struct format_field *f;
f = find_any_field(event, arg->string.string);
arg->string.offset = f->offset;
}
str_offset = *(int *)(data + arg->string.offset);
str_offset &= 0xffff;
printf("%s", ((char *)data) + str_offset);
break;
}
case PRINT_OP:
/*
* The only op for string should be ? :
*/
if (arg->op.op[0] != '?')
return;
val = eval_num_arg(data, size, event, arg->op.left);
if (val)
print_str_arg(data, size, event, arg->op.right->op.left);
else
print_str_arg(data, size, event, arg->op.right->op.right);
break;
default:
/* well... */
break;
}
}
static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struct event *event)
{
static struct format_field *field, *ip_field;
struct print_arg *args, *arg, **next;
unsigned long long ip, val;
char *ptr;
void *bptr;
if (!field) {
field = find_field(event, "buf");
if (!field)
die("can't find buffer field for binary printk");
ip_field = find_field(event, "ip");
if (!ip_field)
die("can't find ip field for binary printk");
}
ip = read_size(data + ip_field->offset, ip_field->size);
/*
* The first arg is the IP pointer.
*/
args = malloc_or_die(sizeof(*args));
arg = args;
arg->next = NULL;
next = &arg->next;
arg->type = PRINT_ATOM;
arg->atom.atom = malloc_or_die(32);
sprintf(arg->atom.atom, "%lld", ip);
/* skip the first "%pf : " */
for (ptr = fmt + 6, bptr = data + field->offset;
bptr < data + size && *ptr; ptr++) {
int ls = 0;
if (*ptr == '%') {
process_again:
ptr++;
switch (*ptr) {
case '%':
break;
case 'l':
ls++;
goto process_again;
case 'L':
ls = 2;
goto process_again;
case '0' ... '9':
goto process_again;
case 'p':
ls = 1;
/* fall through */
case 'd':
case 'u':
case 'x':
case 'i':
/* the pointers are always 4 bytes aligned */
bptr = (void *)(((unsigned long)bptr + 3) &
~3);
switch (ls) {
case 0:
case 1:
ls = long_size;
break;
case 2:
ls = 8;
default:
break;
}
val = read_size(bptr, ls);
bptr += ls;
arg = malloc_or_die(sizeof(*arg));
arg->next = NULL;
arg->type = PRINT_ATOM;
arg->atom.atom = malloc_or_die(32);
sprintf(arg->atom.atom, "%lld", val);
*next = arg;
next = &arg->next;
break;
case 's':
arg = malloc_or_die(sizeof(*arg));
arg->next = NULL;
arg->type = PRINT_STRING;
arg->string.string = strdup(bptr);
bptr += strlen(bptr) + 1;
*next = arg;
next = &arg->next;
default:
break;
}
}
}
return args;
}
static void free_args(struct print_arg *args)
{
struct print_arg *next;
while (args) {
next = args->next;
if (args->type == PRINT_ATOM)
free(args->atom.atom);
else
free(args->string.string);
free(args);
args = next;
}
}
static char *get_bprint_format(void *data, int size __unused, struct event *event)
{
unsigned long long addr;
static struct format_field *field;
struct printk_map *printk;
char *format;
char *p;
if (!field) {
field = find_field(event, "fmt");
if (!field)
die("can't find format field for binary printk");
printf("field->offset = %d size=%d\n", field->offset, field->size);
}
addr = read_size(data + field->offset, field->size);
printk = find_printk(addr);
if (!printk) {
format = malloc_or_die(45);
sprintf(format, "%%pf : (NO FORMAT FOUND at %llx)\n",
addr);
return format;
}
p = printk->printk;
/* Remove any quotes. */
if (*p == '"')
p++;
format = malloc_or_die(strlen(p) + 10);
sprintf(format, "%s : %s", "%pf", p);
/* remove ending quotes and new line since we will add one too */
p = format + strlen(format) - 1;
if (*p == '"')
*p = 0;
p -= 2;
if (strcmp(p, "\\n") == 0)
*p = 0;
return format;
}
static void pretty_print(void *data, int size, struct event *event)
{
struct print_fmt *print_fmt = &event->print_fmt;
struct print_arg *arg = print_fmt->args;
struct print_arg *args = NULL;
const char *ptr = print_fmt->format;
unsigned long long val;
struct func_map *func;
const char *saveptr;
char *bprint_fmt = NULL;
char format[32];
int show_func;
int len;
int ls;
if (event->flags & EVENT_FL_ISFUNC)
ptr = " %pF <-- %pF";
if (event->flags & EVENT_FL_ISBPRINT) {
bprint_fmt = get_bprint_format(data, size, event);
args = make_bprint_args(bprint_fmt, data, size, event);
arg = args;
ptr = bprint_fmt;
}
for (; *ptr; ptr++) {
ls = 0;
if (*ptr == '\\') {
ptr++;
switch (*ptr) {
case 'n':
printf("\n");
break;
case 't':
printf("\t");
break;
case 'r':
printf("\r");
break;
case '\\':
printf("\\");
break;
default:
printf("%c", *ptr);
break;
}
} else if (*ptr == '%') {
saveptr = ptr;
show_func = 0;
cont_process:
ptr++;
switch (*ptr) {
case '%':
printf("%%");
break;
case 'l':
ls++;
goto cont_process;
case 'L':
ls = 2;
goto cont_process;
case 'z':
case 'Z':
case '0' ... '9':
goto cont_process;
case 'p':
if (long_size == 4)
ls = 1;
else
ls = 2;
if (*(ptr+1) == 'F' ||
*(ptr+1) == 'f') {
ptr++;
show_func = *ptr;
}
/* fall through */
case 'd':
case 'i':
case 'x':
case 'X':
case 'u':
if (!arg)
die("no argument match");
len = ((unsigned long)ptr + 1) -
(unsigned long)saveptr;
/* should never happen */
if (len > 32)
die("bad format!");
memcpy(format, saveptr, len);
format[len] = 0;
val = eval_num_arg(data, size, event, arg);
arg = arg->next;
if (show_func) {
func = find_func(val);
if (func) {
printf("%s", func->func);
if (show_func == 'F')
printf("+0x%llx",
val - func->addr);
break;
}
}
switch (ls) {
case 0:
printf(format, (int)val);
break;
case 1:
printf(format, (long)val);
break;
case 2:
printf(format, (long long)val);
break;
default:
die("bad count (%d)", ls);
}
break;
case 's':
if (!arg)
die("no matching argument");
print_str_arg(data, size, event, arg);
arg = arg->next;
break;
default:
printf(">%c<", *ptr);
}
} else
printf("%c", *ptr);
}
if (args) {
free_args(args);
free(bprint_fmt);
}
}
static inline int log10_cpu(int nb)
{
if (nb / 100)
return 3;
if (nb / 10)
return 2;
return 1;
}
static void print_lat_fmt(void *data, int size __unused)
{
unsigned int lat_flags;
unsigned int pc;
int lock_depth;
int hardirq;
int softirq;
lat_flags = parse_common_flags(data);
pc = parse_common_pc(data);
lock_depth = parse_common_lock_depth(data);
hardirq = lat_flags & TRACE_FLAG_HARDIRQ;
softirq = lat_flags & TRACE_FLAG_SOFTIRQ;
printf("%c%c%c",
(lat_flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
(lat_flags & TRACE_FLAG_IRQS_NOSUPPORT) ?
'X' : '.',
(lat_flags & TRACE_FLAG_NEED_RESCHED) ?
'N' : '.',
(hardirq && softirq) ? 'H' :
hardirq ? 'h' : softirq ? 's' : '.');
if (pc)
printf("%x", pc);
else
printf(".");
if (lock_depth < 0)
printf(". ");
else
printf("%d ", lock_depth);
}
#define TRACE_GRAPH_INDENT 2
static struct record *
get_return_for_leaf(int cpu, int cur_pid, unsigned long long cur_func,
struct record *next)
{
struct format_field *field;
struct event *event;
unsigned long val;
int type;
int pid;
type = trace_parse_common_type(next->data);
event = trace_find_event(type);
if (!event)
return NULL;
if (!(event->flags & EVENT_FL_ISFUNCRET))
return NULL;
pid = trace_parse_common_pid(next->data);
field = find_field(event, "func");
if (!field)
die("function return does not have field func");
val = read_size(next->data + field->offset, field->size);
if (cur_pid != pid || cur_func != val)
return NULL;
/* this is a leaf, now advance the iterator */
return trace_read_data(cpu);
}
/* Signal a overhead of time execution to the output */
static void print_graph_overhead(unsigned long long duration)
{
/* Non nested entry or return */
if (duration == ~0ULL)
return (void)printf(" ");
/* Duration exceeded 100 msecs */
if (duration > 100000ULL)
return (void)printf("! ");
/* Duration exceeded 10 msecs */
if (duration > 10000ULL)
return (void)printf("+ ");
printf(" ");
}
static void print_graph_duration(unsigned long long duration)
{
unsigned long usecs = duration / 1000;
unsigned long nsecs_rem = duration % 1000;
/* log10(ULONG_MAX) + '\0' */
char msecs_str[21];
char nsecs_str[5];
int len;
int i;
sprintf(msecs_str, "%lu", usecs);
/* Print msecs */
len = printf("%lu", usecs);
/* Print nsecs (we don't want to exceed 7 numbers) */
if (len < 7) {
snprintf(nsecs_str, 8 - len, "%03lu", nsecs_rem);
len += printf(".%s", nsecs_str);
}
printf(" us ");
/* Print remaining spaces to fit the row's width */
for (i = len; i < 7; i++)
printf(" ");
printf("| ");
}
static void
print_graph_entry_leaf(struct event *event, void *data, struct record *ret_rec)
{
unsigned long long rettime, calltime;
unsigned long long duration, depth;
unsigned long long val;
struct format_field *field;
struct func_map *func;
struct event *ret_event;
int type;
int i;
type = trace_parse_common_type(ret_rec->data);
ret_event = trace_find_event(type);
field = find_field(ret_event, "rettime");
if (!field)
die("can't find rettime in return graph");
rettime = read_size(ret_rec->data + field->offset, field->size);
field = find_field(ret_event, "calltime");
if (!field)
die("can't find rettime in return graph");
calltime = read_size(ret_rec->data + field->offset, field->size);
duration = rettime - calltime;
/* Overhead */
print_graph_overhead(duration);
/* Duration */
print_graph_duration(duration);
field = find_field(event, "depth");
if (!field)
die("can't find depth in entry graph");
depth = read_size(data + field->offset, field->size);
/* Function */
for (i = 0; i < (int)(depth * TRACE_GRAPH_INDENT); i++)
printf(" ");
field = find_field(event, "func");
if (!field)
die("can't find func in entry graph");
val = read_size(data + field->offset, field->size);
func = find_func(val);
if (func)
printf("%s();", func->func);
else
printf("%llx();", val);
}
static void print_graph_nested(struct event *event, void *data)
{
struct format_field *field;
unsigned long long depth;
unsigned long long val;
struct func_map *func;
int i;
/* No overhead */
print_graph_overhead(-1);
/* No time */
printf(" | ");
field = find_field(event, "depth");
if (!field)
die("can't find depth in entry graph");
depth = read_size(data + field->offset, field->size);
/* Function */
for (i = 0; i < (int)(depth * TRACE_GRAPH_INDENT); i++)
printf(" ");
field = find_field(event, "func");
if (!field)
die("can't find func in entry graph");
val = read_size(data + field->offset, field->size);
func = find_func(val);
if (func)
printf("%s() {", func->func);
else
printf("%llx() {", val);
}
static void
pretty_print_func_ent(void *data, int size, struct event *event,
int cpu, int pid)
{
struct format_field *field;
struct record *rec;
void *copy_data;
unsigned long val;
if (latency_format) {
print_lat_fmt(data, size);
printf(" | ");
}
field = find_field(event, "func");
if (!field)
die("function entry does not have func field");
val = read_size(data + field->offset, field->size);
/*
* peek_data may unmap the data pointer. Copy it first.
*/
copy_data = malloc_or_die(size);
memcpy(copy_data, data, size);
data = copy_data;
rec = trace_peek_data(cpu);
if (rec) {
rec = get_return_for_leaf(cpu, pid, val, rec);
if (rec) {
print_graph_entry_leaf(event, data, rec);
goto out_free;
}
}
print_graph_nested(event, data);
out_free:
free(data);
}
static void
pretty_print_func_ret(void *data, int size __unused, struct event *event)
{
unsigned long long rettime, calltime;
unsigned long long duration, depth;
struct format_field *field;
int i;
if (latency_format) {
print_lat_fmt(data, size);
printf(" | ");
}
field = find_field(event, "rettime");
if (!field)
die("can't find rettime in return graph");
rettime = read_size(data + field->offset, field->size);
field = find_field(event, "calltime");
if (!field)
die("can't find calltime in return graph");
calltime = read_size(data + field->offset, field->size);
duration = rettime - calltime;
/* Overhead */
print_graph_overhead(duration);
/* Duration */
print_graph_duration(duration);
field = find_field(event, "depth");
if (!field)
die("can't find depth in entry graph");
depth = read_size(data + field->offset, field->size);
/* Function */
for (i = 0; i < (int)(depth * TRACE_GRAPH_INDENT); i++)
printf(" ");
printf("}");
}
static void
pretty_print_func_graph(void *data, int size, struct event *event,
int cpu, int pid)
{
if (event->flags & EVENT_FL_ISFUNCENT)
pretty_print_func_ent(data, size, event, cpu, pid);
else if (event->flags & EVENT_FL_ISFUNCRET)
pretty_print_func_ret(data, size, event);
printf("\n");
}
void print_trace_event(int cpu, void *data, int size)
{
struct event *event;
int type;
int pid;
type = trace_parse_common_type(data);
event = trace_find_event(type);
if (!event) {
warning("ug! no event found for type %d", type);
return;
}
pid = trace_parse_common_pid(data);
if (event->flags & (EVENT_FL_ISFUNCENT | EVENT_FL_ISFUNCRET))
return pretty_print_func_graph(data, size, event, cpu, pid);
if (latency_format)
print_lat_fmt(data, size);
if (event->flags & EVENT_FL_FAILED) {
printf("EVENT '%s' FAILED TO PARSE\n",
event->name);
return;
}
pretty_print(data, size, event);
}
static void print_fields(struct print_flag_sym *field)
{
printf("{ %s, %s }", field->value, field->str);
if (field->next) {
printf(", ");
print_fields(field->next);
}
}
static void print_args(struct print_arg *args)
{
int print_paren = 1;
switch (args->type) {
case PRINT_NULL:
printf("null");
break;
case PRINT_ATOM:
printf("%s", args->atom.atom);
break;
case PRINT_FIELD:
printf("REC->%s", args->field.name);
break;
case PRINT_FLAGS:
printf("__print_flags(");
print_args(args->flags.field);
printf(", %s, ", args->flags.delim);
print_fields(args->flags.flags);
printf(")");
break;
case PRINT_SYMBOL:
printf("__print_symbolic(");
print_args(args->symbol.field);
printf(", ");
print_fields(args->symbol.symbols);
printf(")");
break;
case PRINT_STRING:
printf("__get_str(%s)", args->string.string);
break;
case PRINT_TYPE:
printf("(%s)", args->typecast.type);
print_args(args->typecast.item);
break;
case PRINT_OP:
if (strcmp(args->op.op, ":") == 0)
print_paren = 0;
if (print_paren)
printf("(");
print_args(args->op.left);
printf(" %s ", args->op.op);
print_args(args->op.right);
if (print_paren)
printf(")");
break;
default:
/* we should warn... */
return;
}
if (args->next) {
printf("\n");
print_args(args->next);
}
}
int parse_ftrace_file(char *buf, unsigned long size)
{
struct format_field *field;
struct print_arg *arg, **list;
struct event *event;
int ret;
init_input_buf(buf, size);
event = alloc_event();
if (!event)
return -ENOMEM;
event->flags |= EVENT_FL_ISFTRACE;
event->name = event_read_name();
if (!event->name)
die("failed to read ftrace event name");
if (strcmp(event->name, "function") == 0)
event->flags |= EVENT_FL_ISFUNC;
else if (strcmp(event->name, "funcgraph_entry") == 0)
event->flags |= EVENT_FL_ISFUNCENT;
else if (strcmp(event->name, "funcgraph_exit") == 0)
event->flags |= EVENT_FL_ISFUNCRET;
else if (strcmp(event->name, "bprint") == 0)
event->flags |= EVENT_FL_ISBPRINT;
event->id = event_read_id();
if (event->id < 0)
die("failed to read ftrace event id");
add_event(event);
ret = event_read_format(event);
if (ret < 0)
die("failed to read ftrace event format");
ret = event_read_print(event);
if (ret < 0)
die("failed to read ftrace event print fmt");
/* New ftrace handles args */
if (ret > 0)
return 0;
/*
* The arguments for ftrace files are parsed by the fields.
* Set up the fields as their arguments.
*/
list = &event->print_fmt.args;
for (field = event->format.fields; field; field = field->next) {
arg = malloc_or_die(sizeof(*arg));
memset(arg, 0, sizeof(*arg));
*list = arg;
list = &arg->next;
arg->type = PRINT_FIELD;
arg->field.name = field->name;
arg->field.field = field;
}
return 0;
}
int parse_event_file(char *buf, unsigned long size, char *sys)
{
struct event *event;
int ret;
init_input_buf(buf, size);
event = alloc_event();
if (!event)
return -ENOMEM;
event->name = event_read_name();
if (!event->name)
die("failed to read event name");
event->id = event_read_id();
if (event->id < 0)
die("failed to read event id");
ret = event_read_format(event);
if (ret < 0) {
warning("failed to read event format for %s", event->name);
goto event_failed;
}
ret = event_read_print(event);
if (ret < 0) {
warning("failed to read event print fmt for %s", event->name);
goto event_failed;
}
event->system = strdup(sys);
#define PRINT_ARGS 0
if (PRINT_ARGS && event->print_fmt.args)
print_args(event->print_fmt.args);
add_event(event);
return 0;
event_failed:
event->flags |= EVENT_FL_FAILED;
/* still add it even if it failed */
add_event(event);
return -1;
}
void parse_set_info(int nr_cpus, int long_sz)
{
cpus = nr_cpus;
long_size = long_sz;
}
int common_pc(struct scripting_context *context)
{
return parse_common_pc(context->event_data);
}
int common_flags(struct scripting_context *context)
{
return parse_common_flags(context->event_data);
}
int common_lock_depth(struct scripting_context *context)
{
return parse_common_lock_depth(context->event_data);
}
Reference in a new issue View git blame Copy permalink