forked from Minki/linux
473a778a2f
Coming in v3.16, trace events will be able to save bitmasks in raw format in the ring buffer and output it with the __get_bitmask() macro. In order for userspace tools to parse this, it must be able to handle the __get_bitmask() call and be able to convert the data that's in the ring buffer into a nice bitmask format. The output is similar to what the kernel uses to print bitmasks, with a comma separator every 4 bytes (8 characters). This allows for cpumasks to also be saved efficiently. The first user is the thermal:thermal_power_limit event which has the following output: thermal_power_limit: cpus=0000000f freq=1900000 cdev_state=0 power=5252 Link: http://lkml.kernel.org/r/20140506132238.22e136d1@gandalf.local.home Suggested-by: Javi Merino <javi.merino@arm.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Acked-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Javi Merino <javi.merino@arm.com> Link: http://lkml.kernel.org/r/20140603032224.229186537@goodmis.org Signed-off-by: Jiri Olsa <jolsa@kernel.org>
6026 lines
128 KiB
C
6026 lines
128 KiB
C
/*
|
|
* Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
|
|
*
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation;
|
|
* version 2.1 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 Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this program; if not, see <http://www.gnu.org/licenses>
|
|
*
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
*
|
|
* The parts for function graph printing was taken and modified from the
|
|
* Linux Kernel that were written by
|
|
* - Copyright (C) 2009 Frederic Weisbecker,
|
|
* Frederic Weisbecker gave his permission to relicense the code to
|
|
* the Lesser General Public License.
|
|
*/
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <stdarg.h>
|
|
#include <ctype.h>
|
|
#include <errno.h>
|
|
#include <stdint.h>
|
|
#include <limits.h>
|
|
|
|
#include "event-parse.h"
|
|
#include "event-utils.h"
|
|
|
|
static const char *input_buf;
|
|
static unsigned long long input_buf_ptr;
|
|
static unsigned long long input_buf_siz;
|
|
|
|
static int is_flag_field;
|
|
static int is_symbolic_field;
|
|
|
|
static int show_warning = 1;
|
|
|
|
#define do_warning(fmt, ...) \
|
|
do { \
|
|
if (show_warning) \
|
|
warning(fmt, ##__VA_ARGS__); \
|
|
} while (0)
|
|
|
|
#define do_warning_event(event, fmt, ...) \
|
|
do { \
|
|
if (!show_warning) \
|
|
continue; \
|
|
\
|
|
if (event) \
|
|
warning("[%s:%s] " fmt, event->system, \
|
|
event->name, ##__VA_ARGS__); \
|
|
else \
|
|
warning(fmt, ##__VA_ARGS__); \
|
|
} while (0)
|
|
|
|
static void init_input_buf(const char *buf, unsigned long long size)
|
|
{
|
|
input_buf = buf;
|
|
input_buf_siz = size;
|
|
input_buf_ptr = 0;
|
|
}
|
|
|
|
const char *pevent_get_input_buf(void)
|
|
{
|
|
return input_buf;
|
|
}
|
|
|
|
unsigned long long pevent_get_input_buf_ptr(void)
|
|
{
|
|
return input_buf_ptr;
|
|
}
|
|
|
|
struct event_handler {
|
|
struct event_handler *next;
|
|
int id;
|
|
const char *sys_name;
|
|
const char *event_name;
|
|
pevent_event_handler_func func;
|
|
void *context;
|
|
};
|
|
|
|
struct pevent_func_params {
|
|
struct pevent_func_params *next;
|
|
enum pevent_func_arg_type type;
|
|
};
|
|
|
|
struct pevent_function_handler {
|
|
struct pevent_function_handler *next;
|
|
enum pevent_func_arg_type ret_type;
|
|
char *name;
|
|
pevent_func_handler func;
|
|
struct pevent_func_params *params;
|
|
int nr_args;
|
|
};
|
|
|
|
static unsigned long long
|
|
process_defined_func(struct trace_seq *s, void *data, int size,
|
|
struct event_format *event, struct print_arg *arg);
|
|
|
|
static void free_func_handle(struct pevent_function_handler *func);
|
|
|
|
/**
|
|
* pevent_buffer_init - init buffer for parsing
|
|
* @buf: buffer to parse
|
|
* @size: the size of the buffer
|
|
*
|
|
* For use with pevent_read_token(), this initializes the internal
|
|
* buffer that pevent_read_token() will parse.
|
|
*/
|
|
void pevent_buffer_init(const char *buf, unsigned long long size)
|
|
{
|
|
init_input_buf(buf, size);
|
|
}
|
|
|
|
void breakpoint(void)
|
|
{
|
|
static int x;
|
|
x++;
|
|
}
|
|
|
|
struct print_arg *alloc_arg(void)
|
|
{
|
|
return calloc(1, sizeof(struct print_arg));
|
|
}
|
|
|
|
struct cmdline {
|
|
char *comm;
|
|
int pid;
|
|
};
|
|
|
|
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;
|
|
}
|
|
|
|
struct cmdline_list {
|
|
struct cmdline_list *next;
|
|
char *comm;
|
|
int pid;
|
|
};
|
|
|
|
static int cmdline_init(struct pevent *pevent)
|
|
{
|
|
struct cmdline_list *cmdlist = pevent->cmdlist;
|
|
struct cmdline_list *item;
|
|
struct cmdline *cmdlines;
|
|
int i;
|
|
|
|
cmdlines = malloc(sizeof(*cmdlines) * pevent->cmdline_count);
|
|
if (!cmdlines)
|
|
return -1;
|
|
|
|
i = 0;
|
|
while (cmdlist) {
|
|
cmdlines[i].pid = cmdlist->pid;
|
|
cmdlines[i].comm = cmdlist->comm;
|
|
i++;
|
|
item = cmdlist;
|
|
cmdlist = cmdlist->next;
|
|
free(item);
|
|
}
|
|
|
|
qsort(cmdlines, pevent->cmdline_count, sizeof(*cmdlines), cmdline_cmp);
|
|
|
|
pevent->cmdlines = cmdlines;
|
|
pevent->cmdlist = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const char *find_cmdline(struct pevent *pevent, int pid)
|
|
{
|
|
const struct cmdline *comm;
|
|
struct cmdline key;
|
|
|
|
if (!pid)
|
|
return "<idle>";
|
|
|
|
if (!pevent->cmdlines && cmdline_init(pevent))
|
|
return "<not enough memory for cmdlines!>";
|
|
|
|
key.pid = pid;
|
|
|
|
comm = bsearch(&key, pevent->cmdlines, pevent->cmdline_count,
|
|
sizeof(*pevent->cmdlines), cmdline_cmp);
|
|
|
|
if (comm)
|
|
return comm->comm;
|
|
return "<...>";
|
|
}
|
|
|
|
/**
|
|
* pevent_pid_is_registered - return if a pid has a cmdline registered
|
|
* @pevent: handle for the pevent
|
|
* @pid: The pid to check if it has a cmdline registered with.
|
|
*
|
|
* Returns 1 if the pid has a cmdline mapped to it
|
|
* 0 otherwise.
|
|
*/
|
|
int pevent_pid_is_registered(struct pevent *pevent, int pid)
|
|
{
|
|
const struct cmdline *comm;
|
|
struct cmdline key;
|
|
|
|
if (!pid)
|
|
return 1;
|
|
|
|
if (!pevent->cmdlines && cmdline_init(pevent))
|
|
return 0;
|
|
|
|
key.pid = pid;
|
|
|
|
comm = bsearch(&key, pevent->cmdlines, pevent->cmdline_count,
|
|
sizeof(*pevent->cmdlines), cmdline_cmp);
|
|
|
|
if (comm)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* If the command lines have been converted to an array, then
|
|
* we must add this pid. This is much slower than when cmdlines
|
|
* are added before the array is initialized.
|
|
*/
|
|
static int add_new_comm(struct pevent *pevent, const char *comm, int pid)
|
|
{
|
|
struct cmdline *cmdlines = pevent->cmdlines;
|
|
const struct cmdline *cmdline;
|
|
struct cmdline key;
|
|
|
|
if (!pid)
|
|
return 0;
|
|
|
|
/* avoid duplicates */
|
|
key.pid = pid;
|
|
|
|
cmdline = bsearch(&key, pevent->cmdlines, pevent->cmdline_count,
|
|
sizeof(*pevent->cmdlines), cmdline_cmp);
|
|
if (cmdline) {
|
|
errno = EEXIST;
|
|
return -1;
|
|
}
|
|
|
|
cmdlines = realloc(cmdlines, sizeof(*cmdlines) * (pevent->cmdline_count + 1));
|
|
if (!cmdlines) {
|
|
errno = ENOMEM;
|
|
return -1;
|
|
}
|
|
|
|
cmdlines[pevent->cmdline_count].comm = strdup(comm);
|
|
if (!cmdlines[pevent->cmdline_count].comm) {
|
|
free(cmdlines);
|
|
errno = ENOMEM;
|
|
return -1;
|
|
}
|
|
|
|
cmdlines[pevent->cmdline_count].pid = pid;
|
|
|
|
if (cmdlines[pevent->cmdline_count].comm)
|
|
pevent->cmdline_count++;
|
|
|
|
qsort(cmdlines, pevent->cmdline_count, sizeof(*cmdlines), cmdline_cmp);
|
|
pevent->cmdlines = cmdlines;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pevent_register_comm - register a pid / comm mapping
|
|
* @pevent: handle for the pevent
|
|
* @comm: the command line to register
|
|
* @pid: the pid to map the command line to
|
|
*
|
|
* This adds a mapping to search for command line names with
|
|
* a given pid. The comm is duplicated.
|
|
*/
|
|
int pevent_register_comm(struct pevent *pevent, const char *comm, int pid)
|
|
{
|
|
struct cmdline_list *item;
|
|
|
|
if (pevent->cmdlines)
|
|
return add_new_comm(pevent, comm, pid);
|
|
|
|
item = malloc(sizeof(*item));
|
|
if (!item)
|
|
return -1;
|
|
|
|
item->comm = strdup(comm);
|
|
if (!item->comm) {
|
|
free(item);
|
|
return -1;
|
|
}
|
|
item->pid = pid;
|
|
item->next = pevent->cmdlist;
|
|
|
|
pevent->cmdlist = item;
|
|
pevent->cmdline_count++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void pevent_register_trace_clock(struct pevent *pevent, char *trace_clock)
|
|
{
|
|
pevent->trace_clock = trace_clock;
|
|
}
|
|
|
|
struct func_map {
|
|
unsigned long long addr;
|
|
char *func;
|
|
char *mod;
|
|
};
|
|
|
|
struct func_list {
|
|
struct func_list *next;
|
|
unsigned long long addr;
|
|
char *func;
|
|
char *mod;
|
|
};
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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 int func_map_init(struct pevent *pevent)
|
|
{
|
|
struct func_list *funclist;
|
|
struct func_list *item;
|
|
struct func_map *func_map;
|
|
int i;
|
|
|
|
func_map = malloc(sizeof(*func_map) * (pevent->func_count + 1));
|
|
if (!func_map)
|
|
return -1;
|
|
|
|
funclist = pevent->funclist;
|
|
|
|
i = 0;
|
|
while (funclist) {
|
|
func_map[i].func = funclist->func;
|
|
func_map[i].addr = funclist->addr;
|
|
func_map[i].mod = funclist->mod;
|
|
i++;
|
|
item = funclist;
|
|
funclist = funclist->next;
|
|
free(item);
|
|
}
|
|
|
|
qsort(func_map, pevent->func_count, sizeof(*func_map), func_cmp);
|
|
|
|
/*
|
|
* Add a special record at the end.
|
|
*/
|
|
func_map[pevent->func_count].func = NULL;
|
|
func_map[pevent->func_count].addr = 0;
|
|
func_map[pevent->func_count].mod = NULL;
|
|
|
|
pevent->func_map = func_map;
|
|
pevent->funclist = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct func_map *
|
|
find_func(struct pevent *pevent, unsigned long long addr)
|
|
{
|
|
struct func_map *func;
|
|
struct func_map key;
|
|
|
|
if (!pevent->func_map)
|
|
func_map_init(pevent);
|
|
|
|
key.addr = addr;
|
|
|
|
func = bsearch(&key, pevent->func_map, pevent->func_count,
|
|
sizeof(*pevent->func_map), func_bcmp);
|
|
|
|
return func;
|
|
}
|
|
|
|
/**
|
|
* pevent_find_function - find a function by a given address
|
|
* @pevent: handle for the pevent
|
|
* @addr: the address to find the function with
|
|
*
|
|
* Returns a pointer to the function stored that has the given
|
|
* address. Note, the address does not have to be exact, it
|
|
* will select the function that would contain the address.
|
|
*/
|
|
const char *pevent_find_function(struct pevent *pevent, unsigned long long addr)
|
|
{
|
|
struct func_map *map;
|
|
|
|
map = find_func(pevent, addr);
|
|
if (!map)
|
|
return NULL;
|
|
|
|
return map->func;
|
|
}
|
|
|
|
/**
|
|
* pevent_find_function_address - find a function address by a given address
|
|
* @pevent: handle for the pevent
|
|
* @addr: the address to find the function with
|
|
*
|
|
* Returns the address the function starts at. This can be used in
|
|
* conjunction with pevent_find_function to print both the function
|
|
* name and the function offset.
|
|
*/
|
|
unsigned long long
|
|
pevent_find_function_address(struct pevent *pevent, unsigned long long addr)
|
|
{
|
|
struct func_map *map;
|
|
|
|
map = find_func(pevent, addr);
|
|
if (!map)
|
|
return 0;
|
|
|
|
return map->addr;
|
|
}
|
|
|
|
/**
|
|
* pevent_register_function - register a function with a given address
|
|
* @pevent: handle for the pevent
|
|
* @function: the function name to register
|
|
* @addr: the address the function starts at
|
|
* @mod: the kernel module the function may be in (NULL for none)
|
|
*
|
|
* This registers a function name with an address and module.
|
|
* The @func passed in is duplicated.
|
|
*/
|
|
int pevent_register_function(struct pevent *pevent, char *func,
|
|
unsigned long long addr, char *mod)
|
|
{
|
|
struct func_list *item = malloc(sizeof(*item));
|
|
|
|
if (!item)
|
|
return -1;
|
|
|
|
item->next = pevent->funclist;
|
|
item->func = strdup(func);
|
|
if (!item->func)
|
|
goto out_free;
|
|
|
|
if (mod) {
|
|
item->mod = strdup(mod);
|
|
if (!item->mod)
|
|
goto out_free_func;
|
|
} else
|
|
item->mod = NULL;
|
|
item->addr = addr;
|
|
|
|
pevent->funclist = item;
|
|
pevent->func_count++;
|
|
|
|
return 0;
|
|
|
|
out_free_func:
|
|
free(item->func);
|
|
item->func = NULL;
|
|
out_free:
|
|
free(item);
|
|
errno = ENOMEM;
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* pevent_print_funcs - print out the stored functions
|
|
* @pevent: handle for the pevent
|
|
*
|
|
* This prints out the stored functions.
|
|
*/
|
|
void pevent_print_funcs(struct pevent *pevent)
|
|
{
|
|
int i;
|
|
|
|
if (!pevent->func_map)
|
|
func_map_init(pevent);
|
|
|
|
for (i = 0; i < (int)pevent->func_count; i++) {
|
|
printf("%016llx %s",
|
|
pevent->func_map[i].addr,
|
|
pevent->func_map[i].func);
|
|
if (pevent->func_map[i].mod)
|
|
printf(" [%s]\n", pevent->func_map[i].mod);
|
|
else
|
|
printf("\n");
|
|
}
|
|
}
|
|
|
|
struct printk_map {
|
|
unsigned long long addr;
|
|
char *printk;
|
|
};
|
|
|
|
struct printk_list {
|
|
struct printk_list *next;
|
|
unsigned long long addr;
|
|
char *printk;
|
|
};
|
|
|
|
static int printk_cmp(const void *a, const void *b)
|
|
{
|
|
const struct printk_map *pa = a;
|
|
const struct printk_map *pb = b;
|
|
|
|
if (pa->addr < pb->addr)
|
|
return -1;
|
|
if (pa->addr > pb->addr)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int printk_map_init(struct pevent *pevent)
|
|
{
|
|
struct printk_list *printklist;
|
|
struct printk_list *item;
|
|
struct printk_map *printk_map;
|
|
int i;
|
|
|
|
printk_map = malloc(sizeof(*printk_map) * (pevent->printk_count + 1));
|
|
if (!printk_map)
|
|
return -1;
|
|
|
|
printklist = pevent->printklist;
|
|
|
|
i = 0;
|
|
while (printklist) {
|
|
printk_map[i].printk = printklist->printk;
|
|
printk_map[i].addr = printklist->addr;
|
|
i++;
|
|
item = printklist;
|
|
printklist = printklist->next;
|
|
free(item);
|
|
}
|
|
|
|
qsort(printk_map, pevent->printk_count, sizeof(*printk_map), printk_cmp);
|
|
|
|
pevent->printk_map = printk_map;
|
|
pevent->printklist = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct printk_map *
|
|
find_printk(struct pevent *pevent, unsigned long long addr)
|
|
{
|
|
struct printk_map *printk;
|
|
struct printk_map key;
|
|
|
|
if (!pevent->printk_map && printk_map_init(pevent))
|
|
return NULL;
|
|
|
|
key.addr = addr;
|
|
|
|
printk = bsearch(&key, pevent->printk_map, pevent->printk_count,
|
|
sizeof(*pevent->printk_map), printk_cmp);
|
|
|
|
return printk;
|
|
}
|
|
|
|
/**
|
|
* pevent_register_print_string - register a string by its address
|
|
* @pevent: handle for the pevent
|
|
* @fmt: the string format to register
|
|
* @addr: the address the string was located at
|
|
*
|
|
* This registers a string by the address it was stored in the kernel.
|
|
* The @fmt passed in is duplicated.
|
|
*/
|
|
int pevent_register_print_string(struct pevent *pevent, const char *fmt,
|
|
unsigned long long addr)
|
|
{
|
|
struct printk_list *item = malloc(sizeof(*item));
|
|
char *p;
|
|
|
|
if (!item)
|
|
return -1;
|
|
|
|
item->next = pevent->printklist;
|
|
item->addr = addr;
|
|
|
|
/* Strip off quotes and '\n' from the end */
|
|
if (fmt[0] == '"')
|
|
fmt++;
|
|
item->printk = strdup(fmt);
|
|
if (!item->printk)
|
|
goto out_free;
|
|
|
|
p = item->printk + strlen(item->printk) - 1;
|
|
if (*p == '"')
|
|
*p = 0;
|
|
|
|
p -= 2;
|
|
if (strcmp(p, "\\n") == 0)
|
|
*p = 0;
|
|
|
|
pevent->printklist = item;
|
|
pevent->printk_count++;
|
|
|
|
return 0;
|
|
|
|
out_free:
|
|
free(item);
|
|
errno = ENOMEM;
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* pevent_print_printk - print out the stored strings
|
|
* @pevent: handle for the pevent
|
|
*
|
|
* This prints the string formats that were stored.
|
|
*/
|
|
void pevent_print_printk(struct pevent *pevent)
|
|
{
|
|
int i;
|
|
|
|
if (!pevent->printk_map)
|
|
printk_map_init(pevent);
|
|
|
|
for (i = 0; i < (int)pevent->printk_count; i++) {
|
|
printf("%016llx %s\n",
|
|
pevent->printk_map[i].addr,
|
|
pevent->printk_map[i].printk);
|
|
}
|
|
}
|
|
|
|
static struct event_format *alloc_event(void)
|
|
{
|
|
return calloc(1, sizeof(struct event_format));
|
|
}
|
|
|
|
static int add_event(struct pevent *pevent, struct event_format *event)
|
|
{
|
|
int i;
|
|
struct event_format **events = realloc(pevent->events, sizeof(event) *
|
|
(pevent->nr_events + 1));
|
|
if (!events)
|
|
return -1;
|
|
|
|
pevent->events = events;
|
|
|
|
for (i = 0; i < pevent->nr_events; i++) {
|
|
if (pevent->events[i]->id > event->id)
|
|
break;
|
|
}
|
|
if (i < pevent->nr_events)
|
|
memmove(&pevent->events[i + 1],
|
|
&pevent->events[i],
|
|
sizeof(event) * (pevent->nr_events - i));
|
|
|
|
pevent->events[i] = event;
|
|
pevent->nr_events++;
|
|
|
|
event->pevent = pevent;
|
|
|
|
return 0;
|
|
}
|
|
|
|
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_flag_sym(struct print_flag_sym *fsym)
|
|
{
|
|
struct print_flag_sym *next;
|
|
|
|
while (fsym) {
|
|
next = fsym->next;
|
|
free(fsym->value);
|
|
free(fsym->str);
|
|
free(fsym);
|
|
fsym = next;
|
|
}
|
|
}
|
|
|
|
static void free_arg(struct print_arg *arg)
|
|
{
|
|
struct print_arg *farg;
|
|
|
|
if (!arg)
|
|
return;
|
|
|
|
switch (arg->type) {
|
|
case PRINT_ATOM:
|
|
free(arg->atom.atom);
|
|
break;
|
|
case PRINT_FIELD:
|
|
free(arg->field.name);
|
|
break;
|
|
case PRINT_FLAGS:
|
|
free_arg(arg->flags.field);
|
|
free(arg->flags.delim);
|
|
free_flag_sym(arg->flags.flags);
|
|
break;
|
|
case PRINT_SYMBOL:
|
|
free_arg(arg->symbol.field);
|
|
free_flag_sym(arg->symbol.symbols);
|
|
break;
|
|
case PRINT_HEX:
|
|
free_arg(arg->hex.field);
|
|
free_arg(arg->hex.size);
|
|
break;
|
|
case PRINT_TYPE:
|
|
free(arg->typecast.type);
|
|
free_arg(arg->typecast.item);
|
|
break;
|
|
case PRINT_STRING:
|
|
case PRINT_BSTRING:
|
|
free(arg->string.string);
|
|
break;
|
|
case PRINT_BITMASK:
|
|
free(arg->bitmask.bitmask);
|
|
break;
|
|
case PRINT_DYNAMIC_ARRAY:
|
|
free(arg->dynarray.index);
|
|
break;
|
|
case PRINT_OP:
|
|
free(arg->op.op);
|
|
free_arg(arg->op.left);
|
|
free_arg(arg->op.right);
|
|
break;
|
|
case PRINT_FUNC:
|
|
while (arg->func.args) {
|
|
farg = arg->func.args;
|
|
arg->func.args = farg->next;
|
|
free_arg(farg);
|
|
}
|
|
break;
|
|
|
|
case PRINT_NULL:
|
|
default:
|
|
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];
|
|
}
|
|
|
|
/**
|
|
* pevent_peek_char - peek at the next character that will be read
|
|
*
|
|
* Returns the next character read, or -1 if end of buffer.
|
|
*/
|
|
int pevent_peek_char(void)
|
|
{
|
|
return __peek_char();
|
|
}
|
|
|
|
static int extend_token(char **tok, char *buf, int size)
|
|
{
|
|
char *newtok = realloc(*tok, size);
|
|
|
|
if (!newtok) {
|
|
free(*tok);
|
|
*tok = NULL;
|
|
return -1;
|
|
}
|
|
|
|
if (!*tok)
|
|
strcpy(newtok, buf);
|
|
else
|
|
strcat(newtok, buf);
|
|
*tok = newtok;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static enum event_type force_token(const char *str, char **tok);
|
|
|
|
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:
|
|
if (asprintf(tok, "%c", ch) < 0)
|
|
return EVENT_ERROR;
|
|
|
|
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();
|
|
goto out;
|
|
|
|
case EVENT_DQUOTE:
|
|
case EVENT_SQUOTE:
|
|
/* don't keep quotes */
|
|
i--;
|
|
quote_ch = ch;
|
|
last_ch = 0;
|
|
concat:
|
|
do {
|
|
if (i == (BUFSIZ - 1)) {
|
|
buf[i] = 0;
|
|
tok_size += BUFSIZ;
|
|
|
|
if (extend_token(tok, buf, tok_size) < 0)
|
|
return EVENT_NONE;
|
|
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--;
|
|
|
|
/*
|
|
* For strings (double quotes) check the next token.
|
|
* If it is another string, concatinate the two.
|
|
*/
|
|
if (type == EVENT_DQUOTE) {
|
|
unsigned long long save_input_buf_ptr = input_buf_ptr;
|
|
|
|
do {
|
|
ch = __read_char();
|
|
} while (isspace(ch));
|
|
if (ch == '"')
|
|
goto concat;
|
|
input_buf_ptr = save_input_buf_ptr;
|
|
}
|
|
|
|
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;
|
|
tok_size += BUFSIZ;
|
|
|
|
if (extend_token(tok, buf, tok_size) < 0)
|
|
return EVENT_NONE;
|
|
i = 0;
|
|
}
|
|
ch = __read_char();
|
|
buf[i++] = ch;
|
|
}
|
|
|
|
out:
|
|
buf[i] = 0;
|
|
if (extend_token(tok, buf, tok_size + i + 1) < 0)
|
|
return EVENT_NONE;
|
|
|
|
if (type == EVENT_ITEM) {
|
|
/*
|
|
* Older versions of the kernel has a bug that
|
|
* creates invalid symbols and will break the mac80211
|
|
* parsing. This is a work around to that bug.
|
|
*
|
|
* See Linux kernel commit:
|
|
* 811cb50baf63461ce0bdb234927046131fc7fa8b
|
|
*/
|
|
if (strcmp(*tok, "LOCAL_PR_FMT") == 0) {
|
|
free(*tok);
|
|
*tok = NULL;
|
|
return force_token("\"\%s\" ", tok);
|
|
} else if (strcmp(*tok, "STA_PR_FMT") == 0) {
|
|
free(*tok);
|
|
*tok = NULL;
|
|
return force_token("\" sta:%pM\" ", tok);
|
|
} else if (strcmp(*tok, "VIF_PR_FMT") == 0) {
|
|
free(*tok);
|
|
*tok = NULL;
|
|
return force_token("\" vif:%p(%d)\" ", tok);
|
|
}
|
|
}
|
|
|
|
return type;
|
|
}
|
|
|
|
static enum event_type force_token(const char *str, char **tok)
|
|
{
|
|
const char *save_input_buf;
|
|
unsigned long long save_input_buf_ptr;
|
|
unsigned long long save_input_buf_siz;
|
|
enum event_type type;
|
|
|
|
/* save off the current input pointers */
|
|
save_input_buf = input_buf;
|
|
save_input_buf_ptr = input_buf_ptr;
|
|
save_input_buf_siz = input_buf_siz;
|
|
|
|
init_input_buf(str, strlen(str));
|
|
|
|
type = __read_token(tok);
|
|
|
|
/* reset back to original token */
|
|
input_buf = save_input_buf;
|
|
input_buf_ptr = save_input_buf_ptr;
|
|
input_buf_siz = save_input_buf_siz;
|
|
|
|
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 */
|
|
*tok = NULL;
|
|
return EVENT_NONE;
|
|
}
|
|
|
|
/**
|
|
* pevent_read_token - access to utilites to use the pevent parser
|
|
* @tok: The token to return
|
|
*
|
|
* This will parse tokens from the string given by
|
|
* pevent_init_data().
|
|
*
|
|
* Returns the token type.
|
|
*/
|
|
enum event_type pevent_read_token(char **tok)
|
|
{
|
|
return read_token(tok);
|
|
}
|
|
|
|
/**
|
|
* pevent_free_token - free a token returned by pevent_read_token
|
|
* @token: the token to free
|
|
*/
|
|
void pevent_free_token(char *token)
|
|
{
|
|
free_token(token);
|
|
}
|
|
|
|
/* 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);
|
|
*tok = NULL;
|
|
}
|
|
|
|
/* not reached */
|
|
*tok = NULL;
|
|
return EVENT_NONE;
|
|
}
|
|
|
|
static int test_type(enum event_type type, enum event_type expect)
|
|
{
|
|
if (type != expect) {
|
|
do_warning("Error: expected type %d but read %d",
|
|
expect, type);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int test_type_token(enum event_type type, const char *token,
|
|
enum event_type expect, const char *expect_tok)
|
|
{
|
|
if (type != expect) {
|
|
do_warning("Error: expected type %d but read %d",
|
|
expect, type);
|
|
return -1;
|
|
}
|
|
|
|
if (strcmp(token, expect_tok) != 0) {
|
|
do_warning("Error: expected '%s' but read '%s'",
|
|
expect_tok, token);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
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)
|
|
{
|
|
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);
|
|
|
|
free_token(token);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int read_expected(enum event_type expect, const char *str)
|
|
{
|
|
return __read_expected(expect, str, 1);
|
|
}
|
|
|
|
static int read_expected_item(enum event_type expect, const char *str)
|
|
{
|
|
return __read_expected(expect, str, 0);
|
|
}
|
|
|
|
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) == 0)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int field_is_long(struct format_field *field)
|
|
{
|
|
/* includes long long */
|
|
if (strstr(field->type, "long"))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static unsigned int type_size(const char *name)
|
|
{
|
|
/* This covers all FIELD_IS_STRING types. */
|
|
static struct {
|
|
const char *type;
|
|
unsigned int size;
|
|
} table[] = {
|
|
{ "u8", 1 },
|
|
{ "u16", 2 },
|
|
{ "u32", 4 },
|
|
{ "u64", 8 },
|
|
{ "s8", 1 },
|
|
{ "s16", 2 },
|
|
{ "s32", 4 },
|
|
{ "s64", 8 },
|
|
{ "char", 1 },
|
|
{ },
|
|
};
|
|
int i;
|
|
|
|
for (i = 0; table[i].type; i++) {
|
|
if (!strcmp(table[i].type, name))
|
|
return table[i].size;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int event_read_fields(struct event_format *event, struct format_field **fields)
|
|
{
|
|
struct format_field *field = NULL;
|
|
enum event_type type;
|
|
char *token;
|
|
char *last_token;
|
|
int count = 0;
|
|
|
|
do {
|
|
unsigned int size_dynamic = 0;
|
|
|
|
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)
|
|
goto fail;
|
|
|
|
free_token(token);
|
|
if (read_expect_type(EVENT_ITEM, &token) < 0)
|
|
goto fail;
|
|
|
|
last_token = token;
|
|
|
|
field = calloc(1, sizeof(*field));
|
|
if (!field)
|
|
goto fail;
|
|
|
|
field->event = event;
|
|
|
|
/* 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) {
|
|
char *new_type;
|
|
new_type = realloc(field->type,
|
|
strlen(field->type) +
|
|
strlen(last_token) + 2);
|
|
if (!new_type) {
|
|
free(last_token);
|
|
goto fail;
|
|
}
|
|
field->type = new_type;
|
|
strcat(field->type, " ");
|
|
strcat(field->type, last_token);
|
|
free(last_token);
|
|
} else
|
|
field->type = last_token;
|
|
last_token = token;
|
|
continue;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
if (!field->type) {
|
|
do_warning_event(event, "%s: no type found", __func__);
|
|
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;
|
|
char *new_brackets;
|
|
int len;
|
|
|
|
field->flags |= FIELD_IS_ARRAY;
|
|
|
|
type = read_token(&token);
|
|
|
|
if (type == EVENT_ITEM)
|
|
field->arraylen = strtoul(token, NULL, 0);
|
|
else
|
|
field->arraylen = 0;
|
|
|
|
while (strcmp(token, "]") != 0) {
|
|
if (last_type == EVENT_ITEM &&
|
|
type == EVENT_ITEM)
|
|
len = 2;
|
|
else
|
|
len = 1;
|
|
last_type = type;
|
|
|
|
new_brackets = realloc(brackets,
|
|
strlen(brackets) +
|
|
strlen(token) + len);
|
|
if (!new_brackets) {
|
|
free(brackets);
|
|
goto fail;
|
|
}
|
|
brackets = new_brackets;
|
|
if (len == 2)
|
|
strcat(brackets, " ");
|
|
strcat(brackets, token);
|
|
/* We only care about the last token */
|
|
field->arraylen = strtoul(token, NULL, 0);
|
|
free_token(token);
|
|
type = read_token(&token);
|
|
if (type == EVENT_NONE) {
|
|
do_warning_event(event, "failed to find token");
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
free_token(token);
|
|
|
|
new_brackets = realloc(brackets, strlen(brackets) + 2);
|
|
if (!new_brackets) {
|
|
free(brackets);
|
|
goto fail;
|
|
}
|
|
brackets = new_brackets;
|
|
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) {
|
|
char *new_type;
|
|
new_type = realloc(field->type,
|
|
strlen(field->type) +
|
|
strlen(field->name) +
|
|
strlen(brackets) + 2);
|
|
if (!new_type) {
|
|
free(brackets);
|
|
goto fail;
|
|
}
|
|
field->type = new_type;
|
|
strcat(field->type, " ");
|
|
strcat(field->type, field->name);
|
|
size_dynamic = type_size(field->name);
|
|
free_token(field->name);
|
|
strcat(field->type, brackets);
|
|
field->name = token;
|
|
type = read_token(&token);
|
|
} else {
|
|
char *new_type;
|
|
new_type = realloc(field->type,
|
|
strlen(field->type) +
|
|
strlen(brackets) + 1);
|
|
if (!new_type) {
|
|
free(brackets);
|
|
goto fail;
|
|
}
|
|
field->type = new_type;
|
|
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 (field_is_long(field))
|
|
field->flags |= FIELD_IS_LONG;
|
|
|
|
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);
|
|
|
|
if (field->flags & FIELD_IS_ARRAY) {
|
|
if (field->arraylen)
|
|
field->elementsize = field->size / field->arraylen;
|
|
else if (field->flags & FIELD_IS_DYNAMIC)
|
|
field->elementsize = size_dynamic;
|
|
else if (field->flags & FIELD_IS_STRING)
|
|
field->elementsize = 1;
|
|
else if (field->flags & FIELD_IS_LONG)
|
|
field->elementsize = event->pevent ?
|
|
event->pevent->long_size :
|
|
sizeof(long);
|
|
} else
|
|
field->elementsize = field->size;
|
|
|
|
*fields = field;
|
|
fields = &field->next;
|
|
|
|
} while (1);
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
free_token(token);
|
|
fail_expect:
|
|
if (field) {
|
|
free(field->type);
|
|
free(field->name);
|
|
free(field);
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static int event_read_format(struct event_format *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;
|
|
}
|
|
|
|
static enum event_type
|
|
process_arg_token(struct event_format *event, struct print_arg *arg,
|
|
char **tok, enum event_type type);
|
|
|
|
static enum event_type
|
|
process_arg(struct event_format *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_op(struct event_format *event, struct print_arg *arg, char **tok);
|
|
|
|
/*
|
|
* For __print_symbolic() and __print_flags, we need to completely
|
|
* evaluate the first argument, which defines what to print next.
|
|
*/
|
|
static enum event_type
|
|
process_field_arg(struct event_format *event, struct print_arg *arg, char **tok)
|
|
{
|
|
enum event_type type;
|
|
|
|
type = process_arg(event, arg, tok);
|
|
|
|
while (type == EVENT_OP) {
|
|
type = process_op(event, arg, tok);
|
|
}
|
|
|
|
return type;
|
|
}
|
|
|
|
static enum event_type
|
|
process_cond(struct event_format *event, struct print_arg *top, char **tok)
|
|
{
|
|
struct print_arg *arg, *left, *right;
|
|
enum event_type type;
|
|
char *token = NULL;
|
|
|
|
arg = alloc_arg();
|
|
left = alloc_arg();
|
|
right = alloc_arg();
|
|
|
|
if (!arg || !left || !right) {
|
|
do_warning_event(event, "%s: not enough memory!", __func__);
|
|
/* arg will be freed at out_free */
|
|
free_arg(left);
|
|
free_arg(right);
|
|
goto out_free;
|
|
}
|
|
|
|
arg->type = PRINT_OP;
|
|
arg->op.left = left;
|
|
arg->op.right = right;
|
|
|
|
*tok = NULL;
|
|
type = process_arg(event, left, &token);
|
|
|
|
again:
|
|
/* Handle other operations in the arguments */
|
|
if (type == EVENT_OP && strcmp(token, ":") != 0) {
|
|
type = process_op(event, left, &token);
|
|
goto again;
|
|
}
|
|
|
|
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:
|
|
/* Top may point to itself */
|
|
top->op.right = NULL;
|
|
free_token(token);
|
|
free_arg(arg);
|
|
return EVENT_ERROR;
|
|
}
|
|
|
|
static enum event_type
|
|
process_array(struct event_format *event, struct print_arg *top, char **tok)
|
|
{
|
|
struct print_arg *arg;
|
|
enum event_type type;
|
|
char *token = NULL;
|
|
|
|
arg = alloc_arg();
|
|
if (!arg) {
|
|
do_warning_event(event, "%s: not enough memory!", __func__);
|
|
/* '*tok' is set to top->op.op. No need to free. */
|
|
*tok = NULL;
|
|
return EVENT_ERROR;
|
|
}
|
|
|
|
*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(token);
|
|
free_arg(arg);
|
|
return EVENT_ERROR;
|
|
}
|
|
|
|
static int get_op_prio(char *op)
|
|
{
|
|
if (!op[1]) {
|
|
switch (op[0]) {
|
|
case '~':
|
|
case '!':
|
|
return 4;
|
|
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:
|
|
do_warning("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 {
|
|
do_warning("unknown op '%s'", op);
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int 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;
|
|
else
|
|
arg->op.prio = get_op_prio(arg->op.op);
|
|
|
|
return arg->op.prio;
|
|
}
|
|
|
|
/* Note, *tok does not get freed, but will most likely be saved */
|
|
static enum event_type
|
|
process_op(struct event_format *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]) {
|
|
do_warning_event(event, "bad op token %s", token);
|
|
goto out_free;
|
|
}
|
|
switch (token[0]) {
|
|
case '~':
|
|
case '!':
|
|
case '+':
|
|
case '-':
|
|
break;
|
|
default:
|
|
do_warning_event(event, "bad op token %s", token);
|
|
goto out_free;
|
|
|
|
}
|
|
|
|
/* make an empty left */
|
|
left = alloc_arg();
|
|
if (!left)
|
|
goto out_warn_free;
|
|
|
|
left->type = PRINT_NULL;
|
|
arg->op.left = left;
|
|
|
|
right = alloc_arg();
|
|
if (!right)
|
|
goto out_warn_free;
|
|
|
|
arg->op.right = right;
|
|
|
|
/* do not free the token, it belongs to an op */
|
|
*tok = NULL;
|
|
type = process_arg(event, right, tok);
|
|
|
|
} else if (strcmp(token, "?") == 0) {
|
|
|
|
left = alloc_arg();
|
|
if (!left)
|
|
goto out_warn_free;
|
|
|
|
/* 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;
|
|
|
|
/* it will set arg->op.right */
|
|
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 ||
|
|
strcmp(token, "==") == 0 ||
|
|
strcmp(token, "!=") == 0) {
|
|
|
|
left = alloc_arg();
|
|
if (!left)
|
|
goto out_warn_free;
|
|
|
|
/* copy the top arg to the left */
|
|
*left = *arg;
|
|
|
|
arg->type = PRINT_OP;
|
|
arg->op.op = token;
|
|
arg->op.left = left;
|
|
arg->op.right = NULL;
|
|
|
|
if (set_op_prio(arg) == -1) {
|
|
event->flags |= EVENT_FL_FAILED;
|
|
/* arg->op.op (= token) will be freed at out_free */
|
|
arg->op.op = NULL;
|
|
goto out_free;
|
|
}
|
|
|
|
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)) {
|
|
char *new_atom;
|
|
|
|
if (left->type != PRINT_ATOM) {
|
|
do_warning_event(event, "bad pointer type");
|
|
goto out_free;
|
|
}
|
|
new_atom = realloc(left->atom.atom,
|
|
strlen(left->atom.atom) + 3);
|
|
if (!new_atom)
|
|
goto out_warn_free;
|
|
|
|
left->atom.atom = new_atom;
|
|
strcat(left->atom.atom, " *");
|
|
free(arg->op.op);
|
|
*arg = *left;
|
|
free(left);
|
|
|
|
return type;
|
|
}
|
|
|
|
right = alloc_arg();
|
|
if (!right)
|
|
goto out_warn_free;
|
|
|
|
type = process_arg_token(event, right, tok, type);
|
|
arg->op.right = right;
|
|
|
|
} else if (strcmp(token, "[") == 0) {
|
|
|
|
left = alloc_arg();
|
|
if (!left)
|
|
goto out_warn_free;
|
|
|
|
*left = *arg;
|
|
|
|
arg->type = PRINT_OP;
|
|
arg->op.op = token;
|
|
arg->op.left = left;
|
|
|
|
arg->op.prio = 0;
|
|
|
|
/* it will set arg->op.right */
|
|
type = process_array(event, arg, tok);
|
|
|
|
} else {
|
|
do_warning_event(event, "unknown op '%s'", token);
|
|
event->flags |= EVENT_FL_FAILED;
|
|
/* the arg is now the left side */
|
|
goto out_free;
|
|
}
|
|
|
|
if (type == EVENT_OP && strcmp(*tok, ":") != 0) {
|
|
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;
|
|
|
|
out_warn_free:
|
|
do_warning_event(event, "%s: not enough memory!", __func__);
|
|
out_free:
|
|
free_token(token);
|
|
*tok = NULL;
|
|
return EVENT_ERROR;
|
|
}
|
|
|
|
static enum event_type
|
|
process_entry(struct event_format *event __maybe_unused, struct print_arg *arg,
|
|
char **tok)
|
|
{
|
|
enum event_type type;
|
|
char *field;
|
|
char *token;
|
|
|
|
if (read_expected(EVENT_OP, "->") < 0)
|
|
goto out_err;
|
|
|
|
if (read_expect_type(EVENT_ITEM, &token) < 0)
|
|
goto out_free;
|
|
field = token;
|
|
|
|
arg->type = PRINT_FIELD;
|
|
arg->field.name = field;
|
|
|
|
if (is_flag_field) {
|
|
arg->field.field = pevent_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 = pevent_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;
|
|
|
|
out_free:
|
|
free_token(token);
|
|
out_err:
|
|
*tok = NULL;
|
|
return EVENT_ERROR;
|
|
}
|
|
|
|
static char *arg_eval (struct print_arg *arg);
|
|
|
|
static unsigned long long
|
|
eval_type_str(unsigned long long val, const char *type, int pointer)
|
|
{
|
|
int sign = 0;
|
|
char *ref;
|
|
int len;
|
|
|
|
len = strlen(type);
|
|
|
|
if (pointer) {
|
|
|
|
if (type[len-1] != '*') {
|
|
do_warning("pointer expected with non pointer type");
|
|
return val;
|
|
}
|
|
|
|
ref = malloc(len);
|
|
if (!ref) {
|
|
do_warning("%s: not enough memory!", __func__);
|
|
return val;
|
|
}
|
|
memcpy(ref, type, len);
|
|
|
|
/* chop off the " *" */
|
|
ref[len - 2] = 0;
|
|
|
|
val = eval_type_str(val, ref, 0);
|
|
free(ref);
|
|
return val;
|
|
}
|
|
|
|
/* check if this is a pointer */
|
|
if (type[len - 1] == '*')
|
|
return val;
|
|
|
|
/* Try to figure out the arg size*/
|
|
if (strncmp(type, "struct", 6) == 0)
|
|
/* all bets off */
|
|
return val;
|
|
|
|
if (strcmp(type, "u8") == 0)
|
|
return val & 0xff;
|
|
|
|
if (strcmp(type, "u16") == 0)
|
|
return val & 0xffff;
|
|
|
|
if (strcmp(type, "u32") == 0)
|
|
return val & 0xffffffff;
|
|
|
|
if (strcmp(type, "u64") == 0 ||
|
|
strcmp(type, "s64"))
|
|
return val;
|
|
|
|
if (strcmp(type, "s8") == 0)
|
|
return (unsigned long long)(char)val & 0xff;
|
|
|
|
if (strcmp(type, "s16") == 0)
|
|
return (unsigned long long)(short)val & 0xffff;
|
|
|
|
if (strcmp(type, "s32") == 0)
|
|
return (unsigned long long)(int)val & 0xffffffff;
|
|
|
|
if (strncmp(type, "unsigned ", 9) == 0) {
|
|
sign = 0;
|
|
type += 9;
|
|
}
|
|
|
|
if (strcmp(type, "char") == 0) {
|
|
if (sign)
|
|
return (unsigned long long)(char)val & 0xff;
|
|
else
|
|
return val & 0xff;
|
|
}
|
|
|
|
if (strcmp(type, "short") == 0) {
|
|
if (sign)
|
|
return (unsigned long long)(short)val & 0xffff;
|
|
else
|
|
return val & 0xffff;
|
|
}
|
|
|
|
if (strcmp(type, "int") == 0) {
|
|
if (sign)
|
|
return (unsigned long long)(int)val & 0xffffffff;
|
|
else
|
|
return val & 0xffffffff;
|
|
}
|
|
|
|
return val;
|
|
}
|
|
|
|
/*
|
|
* Try to figure out the type.
|
|
*/
|
|
static unsigned long long
|
|
eval_type(unsigned long long val, struct print_arg *arg, int pointer)
|
|
{
|
|
if (arg->type != PRINT_TYPE) {
|
|
do_warning("expected type argument");
|
|
return 0;
|
|
}
|
|
|
|
return eval_type_str(val, arg->typecast.type, pointer);
|
|
}
|
|
|
|
static int arg_num_eval(struct print_arg *arg, long long *val)
|
|
{
|
|
long long left, right;
|
|
int ret = 1;
|
|
|
|
switch (arg->type) {
|
|
case PRINT_ATOM:
|
|
*val = strtoll(arg->atom.atom, NULL, 0);
|
|
break;
|
|
case PRINT_TYPE:
|
|
ret = arg_num_eval(arg->typecast.item, val);
|
|
if (!ret)
|
|
break;
|
|
*val = eval_type(*val, arg, 0);
|
|
break;
|
|
case PRINT_OP:
|
|
switch (arg->op.op[0]) {
|
|
case '|':
|
|
ret = arg_num_eval(arg->op.left, &left);
|
|
if (!ret)
|
|
break;
|
|
ret = arg_num_eval(arg->op.right, &right);
|
|
if (!ret)
|
|
break;
|
|
if (arg->op.op[1])
|
|
*val = left || right;
|
|
else
|
|
*val = left | right;
|
|
break;
|
|
case '&':
|
|
ret = arg_num_eval(arg->op.left, &left);
|
|
if (!ret)
|
|
break;
|
|
ret = arg_num_eval(arg->op.right, &right);
|
|
if (!ret)
|
|
break;
|
|
if (arg->op.op[1])
|
|
*val = left && right;
|
|
else
|
|
*val = left & right;
|
|
break;
|
|
case '<':
|
|
ret = arg_num_eval(arg->op.left, &left);
|
|
if (!ret)
|
|
break;
|
|
ret = arg_num_eval(arg->op.right, &right);
|
|
if (!ret)
|
|
break;
|
|
switch (arg->op.op[1]) {
|
|
case 0:
|
|
*val = left < right;
|
|
break;
|
|
case '<':
|
|
*val = left << right;
|
|
break;
|
|
case '=':
|
|
*val = left <= right;
|
|
break;
|
|
default:
|
|
do_warning("unknown op '%s'", arg->op.op);
|
|
ret = 0;
|
|
}
|
|
break;
|
|
case '>':
|
|
ret = arg_num_eval(arg->op.left, &left);
|
|
if (!ret)
|
|
break;
|
|
ret = arg_num_eval(arg->op.right, &right);
|
|
if (!ret)
|
|
break;
|
|
switch (arg->op.op[1]) {
|
|
case 0:
|
|
*val = left > right;
|
|
break;
|
|
case '>':
|
|
*val = left >> right;
|
|
break;
|
|
case '=':
|
|
*val = left >= right;
|
|
break;
|
|
default:
|
|
do_warning("unknown op '%s'", arg->op.op);
|
|
ret = 0;
|
|
}
|
|
break;
|
|
case '=':
|
|
ret = arg_num_eval(arg->op.left, &left);
|
|
if (!ret)
|
|
break;
|
|
ret = arg_num_eval(arg->op.right, &right);
|
|
if (!ret)
|
|
break;
|
|
|
|
if (arg->op.op[1] != '=') {
|
|
do_warning("unknown op '%s'", arg->op.op);
|
|
ret = 0;
|
|
} else
|
|
*val = left == right;
|
|
break;
|
|
case '!':
|
|
ret = arg_num_eval(arg->op.left, &left);
|
|
if (!ret)
|
|
break;
|
|
ret = arg_num_eval(arg->op.right, &right);
|
|
if (!ret)
|
|
break;
|
|
|
|
switch (arg->op.op[1]) {
|
|
case '=':
|
|
*val = left != right;
|
|
break;
|
|
default:
|
|
do_warning("unknown op '%s'", arg->op.op);
|
|
ret = 0;
|
|
}
|
|
break;
|
|
case '-':
|
|
/* check for negative */
|
|
if (arg->op.left->type == PRINT_NULL)
|
|
left = 0;
|
|
else
|
|
ret = arg_num_eval(arg->op.left, &left);
|
|
if (!ret)
|
|
break;
|
|
ret = arg_num_eval(arg->op.right, &right);
|
|
if (!ret)
|
|
break;
|
|
*val = left - right;
|
|
break;
|
|
case '+':
|
|
if (arg->op.left->type == PRINT_NULL)
|
|
left = 0;
|
|
else
|
|
ret = arg_num_eval(arg->op.left, &left);
|
|
if (!ret)
|
|
break;
|
|
ret = arg_num_eval(arg->op.right, &right);
|
|
if (!ret)
|
|
break;
|
|
*val = left + right;
|
|
break;
|
|
default:
|
|
do_warning("unknown op '%s'", arg->op.op);
|
|
ret = 0;
|
|
}
|
|
break;
|
|
|
|
case PRINT_NULL:
|
|
case PRINT_FIELD ... PRINT_SYMBOL:
|
|
case PRINT_STRING:
|
|
case PRINT_BSTRING:
|
|
case PRINT_BITMASK:
|
|
default:
|
|
do_warning("invalid eval type %d", arg->type);
|
|
ret = 0;
|
|
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
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:
|
|
if (!arg_num_eval(arg, &val))
|
|
break;
|
|
sprintf(buf, "%lld", val);
|
|
return buf;
|
|
|
|
case PRINT_NULL:
|
|
case PRINT_FIELD ... PRINT_SYMBOL:
|
|
case PRINT_STRING:
|
|
case PRINT_BSTRING:
|
|
case PRINT_BITMASK:
|
|
default:
|
|
do_warning("invalid eval type %d", arg->type);
|
|
break;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static enum event_type
|
|
process_fields(struct event_format *event, struct print_flag_sym **list, char **tok)
|
|
{
|
|
enum event_type type;
|
|
struct print_arg *arg = NULL;
|
|
struct print_flag_sym *field;
|
|
char *token = *tok;
|
|
char *value;
|
|
|
|
do {
|
|
free_token(token);
|
|
type = read_token_item(&token);
|
|
if (test_type_token(type, token, EVENT_OP, "{"))
|
|
break;
|
|
|
|
arg = alloc_arg();
|
|
if (!arg)
|
|
goto out_free;
|
|
|
|
free_token(token);
|
|
type = process_arg(event, arg, &token);
|
|
|
|
if (type == EVENT_OP)
|
|
type = process_op(event, arg, &token);
|
|
|
|
if (type == EVENT_ERROR)
|
|
goto out_free;
|
|
|
|
if (test_type_token(type, token, EVENT_DELIM, ","))
|
|
goto out_free;
|
|
|
|
field = calloc(1, sizeof(*field));
|
|
if (!field)
|
|
goto out_free;
|
|
|
|
value = arg_eval(arg);
|
|
if (value == NULL)
|
|
goto out_free_field;
|
|
field->value = strdup(value);
|
|
if (field->value == NULL)
|
|
goto out_free_field;
|
|
|
|
free_arg(arg);
|
|
arg = alloc_arg();
|
|
if (!arg)
|
|
goto out_free;
|
|
|
|
free_token(token);
|
|
type = process_arg(event, arg, &token);
|
|
if (test_type_token(type, token, EVENT_OP, "}"))
|
|
goto out_free_field;
|
|
|
|
value = arg_eval(arg);
|
|
if (value == NULL)
|
|
goto out_free_field;
|
|
field->str = strdup(value);
|
|
if (field->str == NULL)
|
|
goto out_free_field;
|
|
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_field:
|
|
free_flag_sym(field);
|
|
out_free:
|
|
free_arg(arg);
|
|
free_token(token);
|
|
*tok = NULL;
|
|
|
|
return EVENT_ERROR;
|
|
}
|
|
|
|
static enum event_type
|
|
process_flags(struct event_format *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;
|
|
|
|
field = alloc_arg();
|
|
if (!field) {
|
|
do_warning_event(event, "%s: not enough memory!", __func__);
|
|
goto out_free;
|
|
}
|
|
|
|
type = process_field_arg(event, field, &token);
|
|
|
|
/* Handle operations in the first argument */
|
|
while (type == EVENT_OP)
|
|
type = process_op(event, field, &token);
|
|
|
|
if (test_type_token(type, token, EVENT_DELIM, ","))
|
|
goto out_free_field;
|
|
free_token(token);
|
|
|
|
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_field:
|
|
free_arg(field);
|
|
out_free:
|
|
free_token(token);
|
|
*tok = NULL;
|
|
return EVENT_ERROR;
|
|
}
|
|
|
|
static enum event_type
|
|
process_symbols(struct event_format *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;
|
|
|
|
field = alloc_arg();
|
|
if (!field) {
|
|
do_warning_event(event, "%s: not enough memory!", __func__);
|
|
goto out_free;
|
|
}
|
|
|
|
type = process_field_arg(event, field, &token);
|
|
|
|
if (test_type_token(type, token, EVENT_DELIM, ","))
|
|
goto out_free_field;
|
|
|
|
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_field:
|
|
free_arg(field);
|
|
out_free:
|
|
free_token(token);
|
|
*tok = NULL;
|
|
return EVENT_ERROR;
|
|
}
|
|
|
|
static enum event_type
|
|
process_hex(struct event_format *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_HEX;
|
|
|
|
field = alloc_arg();
|
|
if (!field) {
|
|
do_warning_event(event, "%s: not enough memory!", __func__);
|
|
goto out_free;
|
|
}
|
|
|
|
type = process_arg(event, field, &token);
|
|
|
|
if (test_type_token(type, token, EVENT_DELIM, ","))
|
|
goto out_free;
|
|
|
|
arg->hex.field = field;
|
|
|
|
free_token(token);
|
|
|
|
field = alloc_arg();
|
|
if (!field) {
|
|
do_warning_event(event, "%s: not enough memory!", __func__);
|
|
*tok = NULL;
|
|
return EVENT_ERROR;
|
|
}
|
|
|
|
type = process_arg(event, field, &token);
|
|
|
|
if (test_type_token(type, token, EVENT_DELIM, ")"))
|
|
goto out_free;
|
|
|
|
arg->hex.size = field;
|
|
|
|
free_token(token);
|
|
type = read_token_item(tok);
|
|
return type;
|
|
|
|
out_free:
|
|
free_arg(field);
|
|
free_token(token);
|
|
*tok = NULL;
|
|
return EVENT_ERROR;
|
|
}
|
|
|
|
static enum event_type
|
|
process_dynamic_array(struct event_format *event, struct print_arg *arg, char **tok)
|
|
{
|
|
struct format_field *field;
|
|
enum event_type type;
|
|
char *token;
|
|
|
|
memset(arg, 0, sizeof(*arg));
|
|
arg->type = PRINT_DYNAMIC_ARRAY;
|
|
|
|
/*
|
|
* The item within the parenthesis is another field that holds
|
|
* the index into where the array starts.
|
|
*/
|
|
type = read_token(&token);
|
|
*tok = token;
|
|
if (type != EVENT_ITEM)
|
|
goto out_free;
|
|
|
|
/* Find the field */
|
|
|
|
field = pevent_find_field(event, token);
|
|
if (!field)
|
|
goto out_free;
|
|
|
|
arg->dynarray.field = field;
|
|
arg->dynarray.index = 0;
|
|
|
|
if (read_expected(EVENT_DELIM, ")") < 0)
|
|
goto out_free;
|
|
|
|
free_token(token);
|
|
type = read_token_item(&token);
|
|
*tok = token;
|
|
if (type != EVENT_OP || strcmp(token, "[") != 0)
|
|
return type;
|
|
|
|
free_token(token);
|
|
arg = alloc_arg();
|
|
if (!arg) {
|
|
do_warning_event(event, "%s: not enough memory!", __func__);
|
|
*tok = NULL;
|
|
return EVENT_ERROR;
|
|
}
|
|
|
|
type = process_arg(event, arg, &token);
|
|
if (type == EVENT_ERROR)
|
|
goto out_free_arg;
|
|
|
|
if (!test_type_token(type, token, EVENT_OP, "]"))
|
|
goto out_free_arg;
|
|
|
|
free_token(token);
|
|
type = read_token_item(tok);
|
|
return type;
|
|
|
|
out_free_arg:
|
|
free_arg(arg);
|
|
out_free:
|
|
free_token(token);
|
|
*tok = NULL;
|
|
return EVENT_ERROR;
|
|
}
|
|
|
|
static enum event_type
|
|
process_paren(struct event_format *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)
|
|
goto out_free;
|
|
|
|
if (type == EVENT_OP)
|
|
type = process_op(event, arg, &token);
|
|
|
|
if (type == EVENT_ERROR)
|
|
goto out_free;
|
|
|
|
if (test_type_token(type, token, EVENT_DELIM, ")"))
|
|
goto out_free;
|
|
|
|
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) {
|
|
do_warning_event(event, "previous needed to be PRINT_ATOM");
|
|
goto out_free;
|
|
}
|
|
|
|
item_arg = alloc_arg();
|
|
if (!item_arg) {
|
|
do_warning_event(event, "%s: not enough memory!",
|
|
__func__);
|
|
goto out_free;
|
|
}
|
|
|
|
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;
|
|
|
|
out_free:
|
|
free_token(token);
|
|
*tok = NULL;
|
|
return EVENT_ERROR;
|
|
}
|
|
|
|
|
|
static enum event_type
|
|
process_str(struct event_format *event __maybe_unused, struct print_arg *arg,
|
|
char **tok)
|
|
{
|
|
enum event_type type;
|
|
char *token;
|
|
|
|
if (read_expect_type(EVENT_ITEM, &token) < 0)
|
|
goto out_free;
|
|
|
|
arg->type = PRINT_STRING;
|
|
arg->string.string = token;
|
|
arg->string.offset = -1;
|
|
|
|
if (read_expected(EVENT_DELIM, ")") < 0)
|
|
goto out_err;
|
|
|
|
type = read_token(&token);
|
|
*tok = token;
|
|
|
|
return type;
|
|
|
|
out_free:
|
|
free_token(token);
|
|
out_err:
|
|
*tok = NULL;
|
|
return EVENT_ERROR;
|
|
}
|
|
|
|
static enum event_type
|
|
process_bitmask(struct event_format *event __maybe_unused, struct print_arg *arg,
|
|
char **tok)
|
|
{
|
|
enum event_type type;
|
|
char *token;
|
|
|
|
if (read_expect_type(EVENT_ITEM, &token) < 0)
|
|
goto out_free;
|
|
|
|
arg->type = PRINT_BITMASK;
|
|
arg->bitmask.bitmask = token;
|
|
arg->bitmask.offset = -1;
|
|
|
|
if (read_expected(EVENT_DELIM, ")") < 0)
|
|
goto out_err;
|
|
|
|
type = read_token(&token);
|
|
*tok = token;
|
|
|
|
return type;
|
|
|
|
out_free:
|
|
free_token(token);
|
|
out_err:
|
|
*tok = NULL;
|
|
return EVENT_ERROR;
|
|
}
|
|
|
|
static struct pevent_function_handler *
|
|
find_func_handler(struct pevent *pevent, char *func_name)
|
|
{
|
|
struct pevent_function_handler *func;
|
|
|
|
if (!pevent)
|
|
return NULL;
|
|
|
|
for (func = pevent->func_handlers; func; func = func->next) {
|
|
if (strcmp(func->name, func_name) == 0)
|
|
break;
|
|
}
|
|
|
|
return func;
|
|
}
|
|
|
|
static void remove_func_handler(struct pevent *pevent, char *func_name)
|
|
{
|
|
struct pevent_function_handler *func;
|
|
struct pevent_function_handler **next;
|
|
|
|
next = &pevent->func_handlers;
|
|
while ((func = *next)) {
|
|
if (strcmp(func->name, func_name) == 0) {
|
|
*next = func->next;
|
|
free_func_handle(func);
|
|
break;
|
|
}
|
|
next = &func->next;
|
|
}
|
|
}
|
|
|
|
static enum event_type
|
|
process_func_handler(struct event_format *event, struct pevent_function_handler *func,
|
|
struct print_arg *arg, char **tok)
|
|
{
|
|
struct print_arg **next_arg;
|
|
struct print_arg *farg;
|
|
enum event_type type;
|
|
char *token;
|
|
int i;
|
|
|
|
arg->type = PRINT_FUNC;
|
|
arg->func.func = func;
|
|
|
|
*tok = NULL;
|
|
|
|
next_arg = &(arg->func.args);
|
|
for (i = 0; i < func->nr_args; i++) {
|
|
farg = alloc_arg();
|
|
if (!farg) {
|
|
do_warning_event(event, "%s: not enough memory!",
|
|
__func__);
|
|
return EVENT_ERROR;
|
|
}
|
|
|
|
type = process_arg(event, farg, &token);
|
|
if (i < (func->nr_args - 1)) {
|
|
if (type != EVENT_DELIM || strcmp(token, ",") != 0) {
|
|
do_warning_event(event,
|
|
"Error: function '%s()' expects %d arguments but event %s only uses %d",
|
|
func->name, func->nr_args,
|
|
event->name, i + 1);
|
|
goto err;
|
|
}
|
|
} else {
|
|
if (type != EVENT_DELIM || strcmp(token, ")") != 0) {
|
|
do_warning_event(event,
|
|
"Error: function '%s()' only expects %d arguments but event %s has more",
|
|
func->name, func->nr_args, event->name);
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
*next_arg = farg;
|
|
next_arg = &(farg->next);
|
|
free_token(token);
|
|
}
|
|
|
|
type = read_token(&token);
|
|
*tok = token;
|
|
|
|
return type;
|
|
|
|
err:
|
|
free_arg(farg);
|
|
free_token(token);
|
|
return EVENT_ERROR;
|
|
}
|
|
|
|
static enum event_type
|
|
process_function(struct event_format *event, struct print_arg *arg,
|
|
char *token, char **tok)
|
|
{
|
|
struct pevent_function_handler *func;
|
|
|
|
if (strcmp(token, "__print_flags") == 0) {
|
|
free_token(token);
|
|
is_flag_field = 1;
|
|
return process_flags(event, arg, tok);
|
|
}
|
|
if (strcmp(token, "__print_symbolic") == 0) {
|
|
free_token(token);
|
|
is_symbolic_field = 1;
|
|
return process_symbols(event, arg, tok);
|
|
}
|
|
if (strcmp(token, "__print_hex") == 0) {
|
|
free_token(token);
|
|
return process_hex(event, arg, tok);
|
|
}
|
|
if (strcmp(token, "__get_str") == 0) {
|
|
free_token(token);
|
|
return process_str(event, arg, tok);
|
|
}
|
|
if (strcmp(token, "__get_bitmask") == 0) {
|
|
free_token(token);
|
|
return process_bitmask(event, arg, tok);
|
|
}
|
|
if (strcmp(token, "__get_dynamic_array") == 0) {
|
|
free_token(token);
|
|
return process_dynamic_array(event, arg, tok);
|
|
}
|
|
|
|
func = find_func_handler(event->pevent, token);
|
|
if (func) {
|
|
free_token(token);
|
|
return process_func_handler(event, func, arg, tok);
|
|
}
|
|
|
|
do_warning_event(event, "function %s not defined", token);
|
|
free_token(token);
|
|
return EVENT_ERROR;
|
|
}
|
|
|
|
static enum event_type
|
|
process_arg_token(struct event_format *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);
|
|
break;
|
|
}
|
|
atom = token;
|
|
/* test the next token */
|
|
type = read_token_item(&token);
|
|
|
|
/*
|
|
* If the next token is a parenthesis, then this
|
|
* is a function.
|
|
*/
|
|
if (type == EVENT_DELIM && strcmp(token, "(") == 0) {
|
|
free_token(token);
|
|
token = NULL;
|
|
/* this will free atom. */
|
|
type = process_function(event, arg, atom, &token);
|
|
break;
|
|
}
|
|
/* atoms can be more than one token long */
|
|
while (type == EVENT_ITEM) {
|
|
char *new_atom;
|
|
new_atom = realloc(atom,
|
|
strlen(atom) + strlen(token) + 2);
|
|
if (!new_atom) {
|
|
free(atom);
|
|
*tok = NULL;
|
|
free_token(token);
|
|
return EVENT_ERROR;
|
|
}
|
|
atom = new_atom;
|
|
strcat(atom, " ");
|
|
strcat(atom, token);
|
|
free_token(token);
|
|
type = read_token_item(&token);
|
|
}
|
|
|
|
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);
|
|
|
|
/* On error, the op is freed */
|
|
if (type == EVENT_ERROR)
|
|
arg->op.op = NULL;
|
|
|
|
/* return error type if errored */
|
|
break;
|
|
|
|
case EVENT_ERROR ... EVENT_NEWLINE:
|
|
default:
|
|
do_warning_event(event, "unexpected type %d", type);
|
|
return EVENT_ERROR;
|
|
}
|
|
*tok = token;
|
|
|
|
return type;
|
|
}
|
|
|
|
static int event_read_print_args(struct event_format *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) {
|
|
type = read_token_item(&token);
|
|
continue;
|
|
}
|
|
|
|
arg = alloc_arg();
|
|
if (!arg) {
|
|
do_warning_event(event, "%s: not enough memory!",
|
|
__func__);
|
|
return -1;
|
|
}
|
|
|
|
type = process_arg(event, arg, &token);
|
|
|
|
if (type == EVENT_ERROR) {
|
|
free_token(token);
|
|
free_arg(arg);
|
|
return -1;
|
|
}
|
|
|
|
*list = arg;
|
|
args++;
|
|
|
|
if (type == EVENT_OP) {
|
|
type = process_op(event, arg, &token);
|
|
free_token(token);
|
|
if (type == EVENT_ERROR) {
|
|
*list = NULL;
|
|
free_arg(arg);
|
|
return -1;
|
|
}
|
|
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 && type != EVENT_ERROR)
|
|
free_token(token);
|
|
|
|
return args;
|
|
}
|
|
|
|
static int event_read_print(struct event_format *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 concatenation of print lines */
|
|
if (type == EVENT_DQUOTE) {
|
|
char *cat;
|
|
|
|
if (asprintf(&cat, "%s%s", event->print_fmt.format, token) < 0)
|
|
goto fail;
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* pevent_find_common_field - return a common field by event
|
|
* @event: handle for the event
|
|
* @name: the name of the common field to return
|
|
*
|
|
* Returns a common field from the event by the given @name.
|
|
* This only searchs the common fields and not all field.
|
|
*/
|
|
struct format_field *
|
|
pevent_find_common_field(struct event_format *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;
|
|
}
|
|
|
|
/**
|
|
* pevent_find_field - find a non-common field
|
|
* @event: handle for the event
|
|
* @name: the name of the non-common field
|
|
*
|
|
* Returns a non-common field by the given @name.
|
|
* This does not search common fields.
|
|
*/
|
|
struct format_field *
|
|
pevent_find_field(struct event_format *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;
|
|
}
|
|
|
|
/**
|
|
* pevent_find_any_field - find any field by name
|
|
* @event: handle for the event
|
|
* @name: the name of the field
|
|
*
|
|
* Returns a field by the given @name.
|
|
* This searchs the common field names first, then
|
|
* the non-common ones if a common one was not found.
|
|
*/
|
|
struct format_field *
|
|
pevent_find_any_field(struct event_format *event, const char *name)
|
|
{
|
|
struct format_field *format;
|
|
|
|
format = pevent_find_common_field(event, name);
|
|
if (format)
|
|
return format;
|
|
return pevent_find_field(event, name);
|
|
}
|
|
|
|
/**
|
|
* pevent_read_number - read a number from data
|
|
* @pevent: handle for the pevent
|
|
* @ptr: the raw data
|
|
* @size: the size of the data that holds the number
|
|
*
|
|
* Returns the number (converted to host) from the
|
|
* raw data.
|
|
*/
|
|
unsigned long long pevent_read_number(struct pevent *pevent,
|
|
const void *ptr, int size)
|
|
{
|
|
switch (size) {
|
|
case 1:
|
|
return *(unsigned char *)ptr;
|
|
case 2:
|
|
return data2host2(pevent, ptr);
|
|
case 4:
|
|
return data2host4(pevent, ptr);
|
|
case 8:
|
|
return data2host8(pevent, ptr);
|
|
default:
|
|
/* BUG! */
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pevent_read_number_field - read a number from data
|
|
* @field: a handle to the field
|
|
* @data: the raw data to read
|
|
* @value: the value to place the number in
|
|
*
|
|
* Reads raw data according to a field offset and size,
|
|
* and translates it into @value.
|
|
*
|
|
* Returns 0 on success, -1 otherwise.
|
|
*/
|
|
int pevent_read_number_field(struct format_field *field, const void *data,
|
|
unsigned long long *value)
|
|
{
|
|
if (!field)
|
|
return -1;
|
|
switch (field->size) {
|
|
case 1:
|
|
case 2:
|
|
case 4:
|
|
case 8:
|
|
*value = pevent_read_number(field->event->pevent,
|
|
data + field->offset, field->size);
|
|
return 0;
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static int get_common_info(struct pevent *pevent,
|
|
const char *type, int *offset, int *size)
|
|
{
|
|
struct event_format *event;
|
|
struct format_field *field;
|
|
|
|
/*
|
|
* All events should have the same common elements.
|
|
* Pick any event to find where the type is;
|
|
*/
|
|
if (!pevent->events) {
|
|
do_warning("no event_list!");
|
|
return -1;
|
|
}
|
|
|
|
event = pevent->events[0];
|
|
field = pevent_find_common_field(event, type);
|
|
if (!field)
|
|
return -1;
|
|
|
|
*offset = field->offset;
|
|
*size = field->size;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __parse_common(struct pevent *pevent, void *data,
|
|
int *size, int *offset, const char *name)
|
|
{
|
|
int ret;
|
|
|
|
if (!*size) {
|
|
ret = get_common_info(pevent, name, offset, size);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
return pevent_read_number(pevent, data + *offset, *size);
|
|
}
|
|
|
|
static int trace_parse_common_type(struct pevent *pevent, void *data)
|
|
{
|
|
return __parse_common(pevent, data,
|
|
&pevent->type_size, &pevent->type_offset,
|
|
"common_type");
|
|
}
|
|
|
|
static int parse_common_pid(struct pevent *pevent, void *data)
|
|
{
|
|
return __parse_common(pevent, data,
|
|
&pevent->pid_size, &pevent->pid_offset,
|
|
"common_pid");
|
|
}
|
|
|
|
static int parse_common_pc(struct pevent *pevent, void *data)
|
|
{
|
|
return __parse_common(pevent, data,
|
|
&pevent->pc_size, &pevent->pc_offset,
|
|
"common_preempt_count");
|
|
}
|
|
|
|
static int parse_common_flags(struct pevent *pevent, void *data)
|
|
{
|
|
return __parse_common(pevent, data,
|
|
&pevent->flags_size, &pevent->flags_offset,
|
|
"common_flags");
|
|
}
|
|
|
|
static int parse_common_lock_depth(struct pevent *pevent, void *data)
|
|
{
|
|
return __parse_common(pevent, data,
|
|
&pevent->ld_size, &pevent->ld_offset,
|
|
"common_lock_depth");
|
|
}
|
|
|
|
static int parse_common_migrate_disable(struct pevent *pevent, void *data)
|
|
{
|
|
return __parse_common(pevent, data,
|
|
&pevent->ld_size, &pevent->ld_offset,
|
|
"common_migrate_disable");
|
|
}
|
|
|
|
static int events_id_cmp(const void *a, const void *b);
|
|
|
|
/**
|
|
* pevent_find_event - find an event by given id
|
|
* @pevent: a handle to the pevent
|
|
* @id: the id of the event
|
|
*
|
|
* Returns an event that has a given @id.
|
|
*/
|
|
struct event_format *pevent_find_event(struct pevent *pevent, int id)
|
|
{
|
|
struct event_format **eventptr;
|
|
struct event_format key;
|
|
struct event_format *pkey = &key;
|
|
|
|
/* Check cache first */
|
|
if (pevent->last_event && pevent->last_event->id == id)
|
|
return pevent->last_event;
|
|
|
|
key.id = id;
|
|
|
|
eventptr = bsearch(&pkey, pevent->events, pevent->nr_events,
|
|
sizeof(*pevent->events), events_id_cmp);
|
|
|
|
if (eventptr) {
|
|
pevent->last_event = *eventptr;
|
|
return *eventptr;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* pevent_find_event_by_name - find an event by given name
|
|
* @pevent: a handle to the pevent
|
|
* @sys: the system name to search for
|
|
* @name: the name of the event to search for
|
|
*
|
|
* This returns an event with a given @name and under the system
|
|
* @sys. If @sys is NULL the first event with @name is returned.
|
|
*/
|
|
struct event_format *
|
|
pevent_find_event_by_name(struct pevent *pevent,
|
|
const char *sys, const char *name)
|
|
{
|
|
struct event_format *event;
|
|
int i;
|
|
|
|
if (pevent->last_event &&
|
|
strcmp(pevent->last_event->name, name) == 0 &&
|
|
(!sys || strcmp(pevent->last_event->system, sys) == 0))
|
|
return pevent->last_event;
|
|
|
|
for (i = 0; i < pevent->nr_events; i++) {
|
|
event = pevent->events[i];
|
|
if (strcmp(event->name, name) == 0) {
|
|
if (!sys)
|
|
break;
|
|
if (strcmp(event->system, sys) == 0)
|
|
break;
|
|
}
|
|
}
|
|
if (i == pevent->nr_events)
|
|
event = NULL;
|
|
|
|
pevent->last_event = event;
|
|
return event;
|
|
}
|
|
|
|
static unsigned long long
|
|
eval_num_arg(void *data, int size, struct event_format *event, struct print_arg *arg)
|
|
{
|
|
struct pevent *pevent = event->pevent;
|
|
unsigned long long val = 0;
|
|
unsigned long long left, right;
|
|
struct print_arg *typearg = NULL;
|
|
struct print_arg *larg;
|
|
unsigned long offset;
|
|
unsigned int field_size;
|
|
|
|
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 = pevent_find_any_field(event, arg->field.name);
|
|
if (!arg->field.field)
|
|
goto out_warning_field;
|
|
|
|
}
|
|
/* must be a number */
|
|
val = pevent_read_number(pevent, data + arg->field.field->offset,
|
|
arg->field.field->size);
|
|
break;
|
|
case PRINT_FLAGS:
|
|
case PRINT_SYMBOL:
|
|
case PRINT_HEX:
|
|
break;
|
|
case PRINT_TYPE:
|
|
val = eval_num_arg(data, size, event, arg->typecast.item);
|
|
return eval_type(val, arg, 0);
|
|
case PRINT_STRING:
|
|
case PRINT_BSTRING:
|
|
case PRINT_BITMASK:
|
|
return 0;
|
|
case PRINT_FUNC: {
|
|
struct trace_seq s;
|
|
trace_seq_init(&s);
|
|
val = process_defined_func(&s, data, size, event, arg);
|
|
trace_seq_destroy(&s);
|
|
return val;
|
|
}
|
|
case PRINT_OP:
|
|
if (strcmp(arg->op.op, "[") == 0) {
|
|
/*
|
|
* Arrays are special, since we don't want
|
|
* to read the arg as is.
|
|
*/
|
|
right = eval_num_arg(data, size, event, arg->op.right);
|
|
|
|
/* handle typecasts */
|
|
larg = arg->op.left;
|
|
while (larg->type == PRINT_TYPE) {
|
|
if (!typearg)
|
|
typearg = larg;
|
|
larg = larg->typecast.item;
|
|
}
|
|
|
|
/* Default to long size */
|
|
field_size = pevent->long_size;
|
|
|
|
switch (larg->type) {
|
|
case PRINT_DYNAMIC_ARRAY:
|
|
offset = pevent_read_number(pevent,
|
|
data + larg->dynarray.field->offset,
|
|
larg->dynarray.field->size);
|
|
if (larg->dynarray.field->elementsize)
|
|
field_size = larg->dynarray.field->elementsize;
|
|
/*
|
|
* The actual length of the dynamic array is stored
|
|
* in the top half of the field, and the offset
|
|
* is in the bottom half of the 32 bit field.
|
|
*/
|
|
offset &= 0xffff;
|
|
offset += right;
|
|
break;
|
|
case PRINT_FIELD:
|
|
if (!larg->field.field) {
|
|
larg->field.field =
|
|
pevent_find_any_field(event, larg->field.name);
|
|
if (!larg->field.field) {
|
|
arg = larg;
|
|
goto out_warning_field;
|
|
}
|
|
}
|
|
field_size = larg->field.field->elementsize;
|
|
offset = larg->field.field->offset +
|
|
right * larg->field.field->elementsize;
|
|
break;
|
|
default:
|
|
goto default_op; /* oops, all bets off */
|
|
}
|
|
val = pevent_read_number(pevent,
|
|
data + offset, field_size);
|
|
if (typearg)
|
|
val = eval_type(val, typearg, 1);
|
|
break;
|
|
} else if (strcmp(arg->op.op, "?") == 0) {
|
|
left = eval_num_arg(data, size, event, arg->op.left);
|
|
arg = arg->op.right;
|
|
if (left)
|
|
val = eval_num_arg(data, size, event, arg->op.left);
|
|
else
|
|
val = eval_num_arg(data, size, event, arg->op.right);
|
|
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 '!':
|
|
switch (arg->op.op[1]) {
|
|
case 0:
|
|
val = !right;
|
|
break;
|
|
case '=':
|
|
val = left != right;
|
|
break;
|
|
default:
|
|
goto out_warning_op;
|
|
}
|
|
break;
|
|
case '~':
|
|
val = ~right;
|
|
break;
|
|
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:
|
|
goto out_warning_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:
|
|
goto out_warning_op;
|
|
}
|
|
break;
|
|
case '=':
|
|
if (arg->op.op[1] != '=')
|
|
goto out_warning_op;
|
|
|
|
val = left == right;
|
|
break;
|
|
case '-':
|
|
val = left - right;
|
|
break;
|
|
case '+':
|
|
val = left + right;
|
|
break;
|
|
case '/':
|
|
val = left / right;
|
|
break;
|
|
case '*':
|
|
val = left * right;
|
|
break;
|
|
default:
|
|
goto out_warning_op;
|
|
}
|
|
break;
|
|
case PRINT_DYNAMIC_ARRAY:
|
|
/* Without [], we pass the address to the dynamic data */
|
|
offset = pevent_read_number(pevent,
|
|
data + arg->dynarray.field->offset,
|
|
arg->dynarray.field->size);
|
|
/*
|
|
* The actual length of the dynamic array is stored
|
|
* in the top half of the field, and the offset
|
|
* is in the bottom half of the 32 bit field.
|
|
*/
|
|
offset &= 0xffff;
|
|
val = (unsigned long long)((unsigned long)data + offset);
|
|
break;
|
|
default: /* not sure what to do there */
|
|
return 0;
|
|
}
|
|
return val;
|
|
|
|
out_warning_op:
|
|
do_warning_event(event, "%s: unknown op '%s'", __func__, arg->op.op);
|
|
return 0;
|
|
|
|
out_warning_field:
|
|
do_warning_event(event, "%s: field %s not found",
|
|
__func__, arg->field.name);
|
|
return 0;
|
|
}
|
|
|
|
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 },
|
|
};
|
|
|
|
static 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_to_seq(struct trace_seq *s, const char *format,
|
|
int len_arg, const char *str)
|
|
{
|
|
if (len_arg >= 0)
|
|
trace_seq_printf(s, format, len_arg, str);
|
|
else
|
|
trace_seq_printf(s, format, str);
|
|
}
|
|
|
|
static void print_bitmask_to_seq(struct pevent *pevent,
|
|
struct trace_seq *s, const char *format,
|
|
int len_arg, const void *data, int size)
|
|
{
|
|
int nr_bits = size * 8;
|
|
int str_size = (nr_bits + 3) / 4;
|
|
int len = 0;
|
|
char buf[3];
|
|
char *str;
|
|
int index;
|
|
int i;
|
|
|
|
/*
|
|
* The kernel likes to put in commas every 32 bits, we
|
|
* can do the same.
|
|
*/
|
|
str_size += (nr_bits - 1) / 32;
|
|
|
|
str = malloc(str_size + 1);
|
|
if (!str) {
|
|
do_warning("%s: not enough memory!", __func__);
|
|
return;
|
|
}
|
|
str[str_size] = 0;
|
|
|
|
/* Start out with -2 for the two chars per byte */
|
|
for (i = str_size - 2; i >= 0; i -= 2) {
|
|
/*
|
|
* data points to a bit mask of size bytes.
|
|
* In the kernel, this is an array of long words, thus
|
|
* endianess is very important.
|
|
*/
|
|
if (pevent->file_bigendian)
|
|
index = size - (len + 1);
|
|
else
|
|
index = len;
|
|
|
|
snprintf(buf, 3, "%02x", *((unsigned char *)data + index));
|
|
memcpy(str + i, buf, 2);
|
|
len++;
|
|
if (!(len & 3) && i > 0) {
|
|
i--;
|
|
str[i] = ',';
|
|
}
|
|
}
|
|
|
|
if (len_arg >= 0)
|
|
trace_seq_printf(s, format, len_arg, str);
|
|
else
|
|
trace_seq_printf(s, format, str);
|
|
|
|
free(str);
|
|
}
|
|
|
|
static void print_str_arg(struct trace_seq *s, void *data, int size,
|
|
struct event_format *event, const char *format,
|
|
int len_arg, struct print_arg *arg)
|
|
{
|
|
struct pevent *pevent = event->pevent;
|
|
struct print_flag_sym *flag;
|
|
struct format_field *field;
|
|
struct printk_map *printk;
|
|
unsigned long long val, fval;
|
|
unsigned long addr;
|
|
char *str;
|
|
unsigned char *hex;
|
|
int print;
|
|
int i, len;
|
|
|
|
switch (arg->type) {
|
|
case PRINT_NULL:
|
|
/* ?? */
|
|
return;
|
|
case PRINT_ATOM:
|
|
print_str_to_seq(s, format, len_arg, arg->atom.atom);
|
|
return;
|
|
case PRINT_FIELD:
|
|
field = arg->field.field;
|
|
if (!field) {
|
|
field = pevent_find_any_field(event, arg->field.name);
|
|
if (!field) {
|
|
str = arg->field.name;
|
|
goto out_warning_field;
|
|
}
|
|
arg->field.field = field;
|
|
}
|
|
/* Zero sized fields, mean the rest of the data */
|
|
len = field->size ? : size - field->offset;
|
|
|
|
/*
|
|
* Some events pass in pointers. If this is not an array
|
|
* and the size is the same as long_size, assume that it
|
|
* is a pointer.
|
|
*/
|
|
if (!(field->flags & FIELD_IS_ARRAY) &&
|
|
field->size == pevent->long_size) {
|
|
addr = *(unsigned long *)(data + field->offset);
|
|
/* Check if it matches a print format */
|
|
printk = find_printk(pevent, addr);
|
|
if (printk)
|
|
trace_seq_puts(s, printk->printk);
|
|
else
|
|
trace_seq_printf(s, "%lx", addr);
|
|
break;
|
|
}
|
|
str = malloc(len + 1);
|
|
if (!str) {
|
|
do_warning_event(event, "%s: not enough memory!",
|
|
__func__);
|
|
return;
|
|
}
|
|
memcpy(str, data + field->offset, len);
|
|
str[len] = 0;
|
|
print_str_to_seq(s, format, len_arg, 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) {
|
|
print_str_to_seq(s, format, len_arg, flag->str);
|
|
break;
|
|
}
|
|
if (fval && (val & fval) == fval) {
|
|
if (print && arg->flags.delim)
|
|
trace_seq_puts(s, arg->flags.delim);
|
|
print_str_to_seq(s, format, len_arg, 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) {
|
|
print_str_to_seq(s, format, len_arg, flag->str);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
case PRINT_HEX:
|
|
if (arg->hex.field->type == PRINT_DYNAMIC_ARRAY) {
|
|
unsigned long offset;
|
|
offset = pevent_read_number(pevent,
|
|
data + arg->hex.field->dynarray.field->offset,
|
|
arg->hex.field->dynarray.field->size);
|
|
hex = data + (offset & 0xffff);
|
|
} else {
|
|
field = arg->hex.field->field.field;
|
|
if (!field) {
|
|
str = arg->hex.field->field.name;
|
|
field = pevent_find_any_field(event, str);
|
|
if (!field)
|
|
goto out_warning_field;
|
|
arg->hex.field->field.field = field;
|
|
}
|
|
hex = data + field->offset;
|
|
}
|
|
len = eval_num_arg(data, size, event, arg->hex.size);
|
|
for (i = 0; i < len; i++) {
|
|
if (i)
|
|
trace_seq_putc(s, ' ');
|
|
trace_seq_printf(s, "%02x", hex[i]);
|
|
}
|
|
break;
|
|
|
|
case PRINT_TYPE:
|
|
break;
|
|
case PRINT_STRING: {
|
|
int str_offset;
|
|
|
|
if (arg->string.offset == -1) {
|
|
struct format_field *f;
|
|
|
|
f = pevent_find_any_field(event, arg->string.string);
|
|
arg->string.offset = f->offset;
|
|
}
|
|
str_offset = data2host4(pevent, data + arg->string.offset);
|
|
str_offset &= 0xffff;
|
|
print_str_to_seq(s, format, len_arg, ((char *)data) + str_offset);
|
|
break;
|
|
}
|
|
case PRINT_BSTRING:
|
|
print_str_to_seq(s, format, len_arg, arg->string.string);
|
|
break;
|
|
case PRINT_BITMASK: {
|
|
int bitmask_offset;
|
|
int bitmask_size;
|
|
|
|
if (arg->bitmask.offset == -1) {
|
|
struct format_field *f;
|
|
|
|
f = pevent_find_any_field(event, arg->bitmask.bitmask);
|
|
arg->bitmask.offset = f->offset;
|
|
}
|
|
bitmask_offset = data2host4(pevent, data + arg->bitmask.offset);
|
|
bitmask_size = bitmask_offset >> 16;
|
|
bitmask_offset &= 0xffff;
|
|
print_bitmask_to_seq(pevent, s, format, len_arg,
|
|
data + bitmask_offset, bitmask_size);
|
|
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(s, data, size, event,
|
|
format, len_arg, arg->op.right->op.left);
|
|
else
|
|
print_str_arg(s, data, size, event,
|
|
format, len_arg, arg->op.right->op.right);
|
|
break;
|
|
case PRINT_FUNC:
|
|
process_defined_func(s, data, size, event, arg);
|
|
break;
|
|
default:
|
|
/* well... */
|
|
break;
|
|
}
|
|
|
|
return;
|
|
|
|
out_warning_field:
|
|
do_warning_event(event, "%s: field %s not found",
|
|
__func__, arg->field.name);
|
|
}
|
|
|
|
static unsigned long long
|
|
process_defined_func(struct trace_seq *s, void *data, int size,
|
|
struct event_format *event, struct print_arg *arg)
|
|
{
|
|
struct pevent_function_handler *func_handle = arg->func.func;
|
|
struct pevent_func_params *param;
|
|
unsigned long long *args;
|
|
unsigned long long ret;
|
|
struct print_arg *farg;
|
|
struct trace_seq str;
|
|
struct save_str {
|
|
struct save_str *next;
|
|
char *str;
|
|
} *strings = NULL, *string;
|
|
int i;
|
|
|
|
if (!func_handle->nr_args) {
|
|
ret = (*func_handle->func)(s, NULL);
|
|
goto out;
|
|
}
|
|
|
|
farg = arg->func.args;
|
|
param = func_handle->params;
|
|
|
|
ret = ULLONG_MAX;
|
|
args = malloc(sizeof(*args) * func_handle->nr_args);
|
|
if (!args)
|
|
goto out;
|
|
|
|
for (i = 0; i < func_handle->nr_args; i++) {
|
|
switch (param->type) {
|
|
case PEVENT_FUNC_ARG_INT:
|
|
case PEVENT_FUNC_ARG_LONG:
|
|
case PEVENT_FUNC_ARG_PTR:
|
|
args[i] = eval_num_arg(data, size, event, farg);
|
|
break;
|
|
case PEVENT_FUNC_ARG_STRING:
|
|
trace_seq_init(&str);
|
|
print_str_arg(&str, data, size, event, "%s", -1, farg);
|
|
trace_seq_terminate(&str);
|
|
string = malloc(sizeof(*string));
|
|
if (!string) {
|
|
do_warning_event(event, "%s(%d): malloc str",
|
|
__func__, __LINE__);
|
|
goto out_free;
|
|
}
|
|
string->next = strings;
|
|
string->str = strdup(str.buffer);
|
|
if (!string->str) {
|
|
free(string);
|
|
do_warning_event(event, "%s(%d): malloc str",
|
|
__func__, __LINE__);
|
|
goto out_free;
|
|
}
|
|
args[i] = (uintptr_t)string->str;
|
|
strings = string;
|
|
trace_seq_destroy(&str);
|
|
break;
|
|
default:
|
|
/*
|
|
* Something went totally wrong, this is not
|
|
* an input error, something in this code broke.
|
|
*/
|
|
do_warning_event(event, "Unexpected end of arguments\n");
|
|
goto out_free;
|
|
}
|
|
farg = farg->next;
|
|
param = param->next;
|
|
}
|
|
|
|
ret = (*func_handle->func)(s, args);
|
|
out_free:
|
|
free(args);
|
|
while (strings) {
|
|
string = strings;
|
|
strings = string->next;
|
|
free(string->str);
|
|
free(string);
|
|
}
|
|
|
|
out:
|
|
/* TBD : handle return type here */
|
|
return ret;
|
|
}
|
|
|
|
static void free_args(struct print_arg *args)
|
|
{
|
|
struct print_arg *next;
|
|
|
|
while (args) {
|
|
next = args->next;
|
|
|
|
free_arg(args);
|
|
args = next;
|
|
}
|
|
}
|
|
|
|
static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struct event_format *event)
|
|
{
|
|
struct pevent *pevent = event->pevent;
|
|
struct format_field *field, *ip_field;
|
|
struct print_arg *args, *arg, **next;
|
|
unsigned long long ip, val;
|
|
char *ptr;
|
|
void *bptr;
|
|
int vsize;
|
|
|
|
field = pevent->bprint_buf_field;
|
|
ip_field = pevent->bprint_ip_field;
|
|
|
|
if (!field) {
|
|
field = pevent_find_field(event, "buf");
|
|
if (!field) {
|
|
do_warning_event(event, "can't find buffer field for binary printk");
|
|
return NULL;
|
|
}
|
|
ip_field = pevent_find_field(event, "ip");
|
|
if (!ip_field) {
|
|
do_warning_event(event, "can't find ip field for binary printk");
|
|
return NULL;
|
|
}
|
|
pevent->bprint_buf_field = field;
|
|
pevent->bprint_ip_field = ip_field;
|
|
}
|
|
|
|
ip = pevent_read_number(pevent, data + ip_field->offset, ip_field->size);
|
|
|
|
/*
|
|
* The first arg is the IP pointer.
|
|
*/
|
|
args = alloc_arg();
|
|
if (!args) {
|
|
do_warning_event(event, "%s(%d): not enough memory!",
|
|
__func__, __LINE__);
|
|
return NULL;
|
|
}
|
|
arg = args;
|
|
arg->next = NULL;
|
|
next = &arg->next;
|
|
|
|
arg->type = PRINT_ATOM;
|
|
|
|
if (asprintf(&arg->atom.atom, "%lld", ip) < 0)
|
|
goto out_free;
|
|
|
|
/* skip the first "%pf: " */
|
|
for (ptr = fmt + 5, 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 '.':
|
|
goto process_again;
|
|
case 'p':
|
|
ls = 1;
|
|
/* fall through */
|
|
case 'd':
|
|
case 'u':
|
|
case 'x':
|
|
case 'i':
|
|
switch (ls) {
|
|
case 0:
|
|
vsize = 4;
|
|
break;
|
|
case 1:
|
|
vsize = pevent->long_size;
|
|
break;
|
|
case 2:
|
|
vsize = 8;
|
|
break;
|
|
default:
|
|
vsize = ls; /* ? */
|
|
break;
|
|
}
|
|
/* fall through */
|
|
case '*':
|
|
if (*ptr == '*')
|
|
vsize = 4;
|
|
|
|
/* the pointers are always 4 bytes aligned */
|
|
bptr = (void *)(((unsigned long)bptr + 3) &
|
|
~3);
|
|
val = pevent_read_number(pevent, bptr, vsize);
|
|
bptr += vsize;
|
|
arg = alloc_arg();
|
|
if (!arg) {
|
|
do_warning_event(event, "%s(%d): not enough memory!",
|
|
__func__, __LINE__);
|
|
goto out_free;
|
|
}
|
|
arg->next = NULL;
|
|
arg->type = PRINT_ATOM;
|
|
if (asprintf(&arg->atom.atom, "%lld", val) < 0) {
|
|
free(arg);
|
|
goto out_free;
|
|
}
|
|
*next = arg;
|
|
next = &arg->next;
|
|
/*
|
|
* The '*' case means that an arg is used as the length.
|
|
* We need to continue to figure out for what.
|
|
*/
|
|
if (*ptr == '*')
|
|
goto process_again;
|
|
|
|
break;
|
|
case 's':
|
|
arg = alloc_arg();
|
|
if (!arg) {
|
|
do_warning_event(event, "%s(%d): not enough memory!",
|
|
__func__, __LINE__);
|
|
goto out_free;
|
|
}
|
|
arg->next = NULL;
|
|
arg->type = PRINT_BSTRING;
|
|
arg->string.string = strdup(bptr);
|
|
if (!arg->string.string)
|
|
goto out_free;
|
|
bptr += strlen(bptr) + 1;
|
|
*next = arg;
|
|
next = &arg->next;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return args;
|
|
|
|
out_free:
|
|
free_args(args);
|
|
return NULL;
|
|
}
|
|
|
|
static char *
|
|
get_bprint_format(void *data, int size __maybe_unused,
|
|
struct event_format *event)
|
|
{
|
|
struct pevent *pevent = event->pevent;
|
|
unsigned long long addr;
|
|
struct format_field *field;
|
|
struct printk_map *printk;
|
|
char *format;
|
|
|
|
field = pevent->bprint_fmt_field;
|
|
|
|
if (!field) {
|
|
field = pevent_find_field(event, "fmt");
|
|
if (!field) {
|
|
do_warning_event(event, "can't find format field for binary printk");
|
|
return NULL;
|
|
}
|
|
pevent->bprint_fmt_field = field;
|
|
}
|
|
|
|
addr = pevent_read_number(pevent, data + field->offset, field->size);
|
|
|
|
printk = find_printk(pevent, addr);
|
|
if (!printk) {
|
|
if (asprintf(&format, "%%pf: (NO FORMAT FOUND at %llx)\n", addr) < 0)
|
|
return NULL;
|
|
return format;
|
|
}
|
|
|
|
if (asprintf(&format, "%s: %s", "%pf", printk->printk) < 0)
|
|
return NULL;
|
|
|
|
return format;
|
|
}
|
|
|
|
static void print_mac_arg(struct trace_seq *s, int mac, void *data, int size,
|
|
struct event_format *event, struct print_arg *arg)
|
|
{
|
|
unsigned char *buf;
|
|
const char *fmt = "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x";
|
|
|
|
if (arg->type == PRINT_FUNC) {
|
|
process_defined_func(s, data, size, event, arg);
|
|
return;
|
|
}
|
|
|
|
if (arg->type != PRINT_FIELD) {
|
|
trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d",
|
|
arg->type);
|
|
return;
|
|
}
|
|
|
|
if (mac == 'm')
|
|
fmt = "%.2x%.2x%.2x%.2x%.2x%.2x";
|
|
if (!arg->field.field) {
|
|
arg->field.field =
|
|
pevent_find_any_field(event, arg->field.name);
|
|
if (!arg->field.field) {
|
|
do_warning_event(event, "%s: field %s not found",
|
|
__func__, arg->field.name);
|
|
return;
|
|
}
|
|
}
|
|
if (arg->field.field->size != 6) {
|
|
trace_seq_printf(s, "INVALIDMAC");
|
|
return;
|
|
}
|
|
buf = data + arg->field.field->offset;
|
|
trace_seq_printf(s, fmt, buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
|
|
}
|
|
|
|
static int is_printable_array(char *p, unsigned int len)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < len && p[i]; i++)
|
|
if (!isprint(p[i]) && !isspace(p[i]))
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
static void print_event_fields(struct trace_seq *s, void *data,
|
|
int size __maybe_unused,
|
|
struct event_format *event)
|
|
{
|
|
struct format_field *field;
|
|
unsigned long long val;
|
|
unsigned int offset, len, i;
|
|
|
|
field = event->format.fields;
|
|
while (field) {
|
|
trace_seq_printf(s, " %s=", field->name);
|
|
if (field->flags & FIELD_IS_ARRAY) {
|
|
offset = field->offset;
|
|
len = field->size;
|
|
if (field->flags & FIELD_IS_DYNAMIC) {
|
|
val = pevent_read_number(event->pevent, data + offset, len);
|
|
offset = val;
|
|
len = offset >> 16;
|
|
offset &= 0xffff;
|
|
}
|
|
if (field->flags & FIELD_IS_STRING &&
|
|
is_printable_array(data + offset, len)) {
|
|
trace_seq_printf(s, "%s", (char *)data + offset);
|
|
} else {
|
|
trace_seq_puts(s, "ARRAY[");
|
|
for (i = 0; i < len; i++) {
|
|
if (i)
|
|
trace_seq_puts(s, ", ");
|
|
trace_seq_printf(s, "%02x",
|
|
*((unsigned char *)data + offset + i));
|
|
}
|
|
trace_seq_putc(s, ']');
|
|
field->flags &= ~FIELD_IS_STRING;
|
|
}
|
|
} else {
|
|
val = pevent_read_number(event->pevent, data + field->offset,
|
|
field->size);
|
|
if (field->flags & FIELD_IS_POINTER) {
|
|
trace_seq_printf(s, "0x%llx", val);
|
|
} else if (field->flags & FIELD_IS_SIGNED) {
|
|
switch (field->size) {
|
|
case 4:
|
|
/*
|
|
* If field is long then print it in hex.
|
|
* A long usually stores pointers.
|
|
*/
|
|
if (field->flags & FIELD_IS_LONG)
|
|
trace_seq_printf(s, "0x%x", (int)val);
|
|
else
|
|
trace_seq_printf(s, "%d", (int)val);
|
|
break;
|
|
case 2:
|
|
trace_seq_printf(s, "%2d", (short)val);
|
|
break;
|
|
case 1:
|
|
trace_seq_printf(s, "%1d", (char)val);
|
|
break;
|
|
default:
|
|
trace_seq_printf(s, "%lld", val);
|
|
}
|
|
} else {
|
|
if (field->flags & FIELD_IS_LONG)
|
|
trace_seq_printf(s, "0x%llx", val);
|
|
else
|
|
trace_seq_printf(s, "%llu", val);
|
|
}
|
|
}
|
|
field = field->next;
|
|
}
|
|
}
|
|
|
|
static void pretty_print(struct trace_seq *s, void *data, int size, struct event_format *event)
|
|
{
|
|
struct pevent *pevent = event->pevent;
|
|
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;
|
|
struct trace_seq p;
|
|
char *bprint_fmt = NULL;
|
|
char format[32];
|
|
int show_func;
|
|
int len_as_arg;
|
|
int len_arg;
|
|
int len;
|
|
int ls;
|
|
|
|
if (event->flags & EVENT_FL_FAILED) {
|
|
trace_seq_printf(s, "[FAILED TO PARSE]");
|
|
print_event_fields(s, data, size, event);
|
|
return;
|
|
}
|
|
|
|
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':
|
|
trace_seq_putc(s, '\n');
|
|
break;
|
|
case 't':
|
|
trace_seq_putc(s, '\t');
|
|
break;
|
|
case 'r':
|
|
trace_seq_putc(s, '\r');
|
|
break;
|
|
case '\\':
|
|
trace_seq_putc(s, '\\');
|
|
break;
|
|
default:
|
|
trace_seq_putc(s, *ptr);
|
|
break;
|
|
}
|
|
|
|
} else if (*ptr == '%') {
|
|
saveptr = ptr;
|
|
show_func = 0;
|
|
len_as_arg = 0;
|
|
cont_process:
|
|
ptr++;
|
|
switch (*ptr) {
|
|
case '%':
|
|
trace_seq_putc(s, '%');
|
|
break;
|
|
case '#':
|
|
/* FIXME: need to handle properly */
|
|
goto cont_process;
|
|
case 'h':
|
|
ls--;
|
|
goto cont_process;
|
|
case 'l':
|
|
ls++;
|
|
goto cont_process;
|
|
case 'L':
|
|
ls = 2;
|
|
goto cont_process;
|
|
case '*':
|
|
/* The argument is the length. */
|
|
if (!arg) {
|
|
do_warning_event(event, "no argument match");
|
|
event->flags |= EVENT_FL_FAILED;
|
|
goto out_failed;
|
|
}
|
|
len_arg = eval_num_arg(data, size, event, arg);
|
|
len_as_arg = 1;
|
|
arg = arg->next;
|
|
goto cont_process;
|
|
case '.':
|
|
case 'z':
|
|
case 'Z':
|
|
case '0' ... '9':
|
|
goto cont_process;
|
|
case 'p':
|
|
if (pevent->long_size == 4)
|
|
ls = 1;
|
|
else
|
|
ls = 2;
|
|
|
|
if (*(ptr+1) == 'F' ||
|
|
*(ptr+1) == 'f') {
|
|
ptr++;
|
|
show_func = *ptr;
|
|
} else if (*(ptr+1) == 'M' || *(ptr+1) == 'm') {
|
|
print_mac_arg(s, *(ptr+1), data, size, event, arg);
|
|
ptr++;
|
|
arg = arg->next;
|
|
break;
|
|
}
|
|
|
|
/* fall through */
|
|
case 'd':
|
|
case 'i':
|
|
case 'x':
|
|
case 'X':
|
|
case 'u':
|
|
if (!arg) {
|
|
do_warning_event(event, "no argument match");
|
|
event->flags |= EVENT_FL_FAILED;
|
|
goto out_failed;
|
|
}
|
|
|
|
len = ((unsigned long)ptr + 1) -
|
|
(unsigned long)saveptr;
|
|
|
|
/* should never happen */
|
|
if (len > 31) {
|
|
do_warning_event(event, "bad format!");
|
|
event->flags |= EVENT_FL_FAILED;
|
|
len = 31;
|
|
}
|
|
|
|
memcpy(format, saveptr, len);
|
|
format[len] = 0;
|
|
|
|
val = eval_num_arg(data, size, event, arg);
|
|
arg = arg->next;
|
|
|
|
if (show_func) {
|
|
func = find_func(pevent, val);
|
|
if (func) {
|
|
trace_seq_puts(s, func->func);
|
|
if (show_func == 'F')
|
|
trace_seq_printf(s,
|
|
"+0x%llx",
|
|
val - func->addr);
|
|
break;
|
|
}
|
|
}
|
|
if (pevent->long_size == 8 && ls &&
|
|
sizeof(long) != 8) {
|
|
char *p;
|
|
|
|
ls = 2;
|
|
/* make %l into %ll */
|
|
p = strchr(format, 'l');
|
|
if (p)
|
|
memmove(p+1, p, strlen(p)+1);
|
|
else if (strcmp(format, "%p") == 0)
|
|
strcpy(format, "0x%llx");
|
|
}
|
|
switch (ls) {
|
|
case -2:
|
|
if (len_as_arg)
|
|
trace_seq_printf(s, format, len_arg, (char)val);
|
|
else
|
|
trace_seq_printf(s, format, (char)val);
|
|
break;
|
|
case -1:
|
|
if (len_as_arg)
|
|
trace_seq_printf(s, format, len_arg, (short)val);
|
|
else
|
|
trace_seq_printf(s, format, (short)val);
|
|
break;
|
|
case 0:
|
|
if (len_as_arg)
|
|
trace_seq_printf(s, format, len_arg, (int)val);
|
|
else
|
|
trace_seq_printf(s, format, (int)val);
|
|
break;
|
|
case 1:
|
|
if (len_as_arg)
|
|
trace_seq_printf(s, format, len_arg, (long)val);
|
|
else
|
|
trace_seq_printf(s, format, (long)val);
|
|
break;
|
|
case 2:
|
|
if (len_as_arg)
|
|
trace_seq_printf(s, format, len_arg,
|
|
(long long)val);
|
|
else
|
|
trace_seq_printf(s, format, (long long)val);
|
|
break;
|
|
default:
|
|
do_warning_event(event, "bad count (%d)", ls);
|
|
event->flags |= EVENT_FL_FAILED;
|
|
}
|
|
break;
|
|
case 's':
|
|
if (!arg) {
|
|
do_warning_event(event, "no matching argument");
|
|
event->flags |= EVENT_FL_FAILED;
|
|
goto out_failed;
|
|
}
|
|
|
|
len = ((unsigned long)ptr + 1) -
|
|
(unsigned long)saveptr;
|
|
|
|
/* should never happen */
|
|
if (len > 31) {
|
|
do_warning_event(event, "bad format!");
|
|
event->flags |= EVENT_FL_FAILED;
|
|
len = 31;
|
|
}
|
|
|
|
memcpy(format, saveptr, len);
|
|
format[len] = 0;
|
|
if (!len_as_arg)
|
|
len_arg = -1;
|
|
/* Use helper trace_seq */
|
|
trace_seq_init(&p);
|
|
print_str_arg(&p, data, size, event,
|
|
format, len_arg, arg);
|
|
trace_seq_terminate(&p);
|
|
trace_seq_puts(s, p.buffer);
|
|
trace_seq_destroy(&p);
|
|
arg = arg->next;
|
|
break;
|
|
default:
|
|
trace_seq_printf(s, ">%c<", *ptr);
|
|
|
|
}
|
|
} else
|
|
trace_seq_putc(s, *ptr);
|
|
}
|
|
|
|
if (event->flags & EVENT_FL_FAILED) {
|
|
out_failed:
|
|
trace_seq_printf(s, "[FAILED TO PARSE]");
|
|
}
|
|
|
|
if (args) {
|
|
free_args(args);
|
|
free(bprint_fmt);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* pevent_data_lat_fmt - parse the data for the latency format
|
|
* @pevent: a handle to the pevent
|
|
* @s: the trace_seq to write to
|
|
* @record: the record to read from
|
|
*
|
|
* This parses out the Latency format (interrupts disabled,
|
|
* need rescheduling, in hard/soft interrupt, preempt count
|
|
* and lock depth) and places it into the trace_seq.
|
|
*/
|
|
void pevent_data_lat_fmt(struct pevent *pevent,
|
|
struct trace_seq *s, struct pevent_record *record)
|
|
{
|
|
static int check_lock_depth = 1;
|
|
static int check_migrate_disable = 1;
|
|
static int lock_depth_exists;
|
|
static int migrate_disable_exists;
|
|
unsigned int lat_flags;
|
|
unsigned int pc;
|
|
int lock_depth;
|
|
int migrate_disable;
|
|
int hardirq;
|
|
int softirq;
|
|
void *data = record->data;
|
|
|
|
lat_flags = parse_common_flags(pevent, data);
|
|
pc = parse_common_pc(pevent, data);
|
|
/* lock_depth may not always exist */
|
|
if (lock_depth_exists)
|
|
lock_depth = parse_common_lock_depth(pevent, data);
|
|
else if (check_lock_depth) {
|
|
lock_depth = parse_common_lock_depth(pevent, data);
|
|
if (lock_depth < 0)
|
|
check_lock_depth = 0;
|
|
else
|
|
lock_depth_exists = 1;
|
|
}
|
|
|
|
/* migrate_disable may not always exist */
|
|
if (migrate_disable_exists)
|
|
migrate_disable = parse_common_migrate_disable(pevent, data);
|
|
else if (check_migrate_disable) {
|
|
migrate_disable = parse_common_migrate_disable(pevent, data);
|
|
if (migrate_disable < 0)
|
|
check_migrate_disable = 0;
|
|
else
|
|
migrate_disable_exists = 1;
|
|
}
|
|
|
|
hardirq = lat_flags & TRACE_FLAG_HARDIRQ;
|
|
softirq = lat_flags & TRACE_FLAG_SOFTIRQ;
|
|
|
|
trace_seq_printf(s, "%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)
|
|
trace_seq_printf(s, "%x", pc);
|
|
else
|
|
trace_seq_putc(s, '.');
|
|
|
|
if (migrate_disable_exists) {
|
|
if (migrate_disable < 0)
|
|
trace_seq_putc(s, '.');
|
|
else
|
|
trace_seq_printf(s, "%d", migrate_disable);
|
|
}
|
|
|
|
if (lock_depth_exists) {
|
|
if (lock_depth < 0)
|
|
trace_seq_putc(s, '.');
|
|
else
|
|
trace_seq_printf(s, "%d", lock_depth);
|
|
}
|
|
|
|
trace_seq_terminate(s);
|
|
}
|
|
|
|
/**
|
|
* pevent_data_type - parse out the given event type
|
|
* @pevent: a handle to the pevent
|
|
* @rec: the record to read from
|
|
*
|
|
* This returns the event id from the @rec.
|
|
*/
|
|
int pevent_data_type(struct pevent *pevent, struct pevent_record *rec)
|
|
{
|
|
return trace_parse_common_type(pevent, rec->data);
|
|
}
|
|
|
|
/**
|
|
* pevent_data_event_from_type - find the event by a given type
|
|
* @pevent: a handle to the pevent
|
|
* @type: the type of the event.
|
|
*
|
|
* This returns the event form a given @type;
|
|
*/
|
|
struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type)
|
|
{
|
|
return pevent_find_event(pevent, type);
|
|
}
|
|
|
|
/**
|
|
* pevent_data_pid - parse the PID from raw data
|
|
* @pevent: a handle to the pevent
|
|
* @rec: the record to parse
|
|
*
|
|
* This returns the PID from a raw data.
|
|
*/
|
|
int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec)
|
|
{
|
|
return parse_common_pid(pevent, rec->data);
|
|
}
|
|
|
|
/**
|
|
* pevent_data_comm_from_pid - return the command line from PID
|
|
* @pevent: a handle to the pevent
|
|
* @pid: the PID of the task to search for
|
|
*
|
|
* This returns a pointer to the command line that has the given
|
|
* @pid.
|
|
*/
|
|
const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid)
|
|
{
|
|
const char *comm;
|
|
|
|
comm = find_cmdline(pevent, pid);
|
|
return comm;
|
|
}
|
|
|
|
/**
|
|
* pevent_data_comm_from_pid - parse the data into the print format
|
|
* @s: the trace_seq to write to
|
|
* @event: the handle to the event
|
|
* @record: the record to read from
|
|
*
|
|
* This parses the raw @data using the given @event information and
|
|
* writes the print format into the trace_seq.
|
|
*/
|
|
void pevent_event_info(struct trace_seq *s, struct event_format *event,
|
|
struct pevent_record *record)
|
|
{
|
|
int print_pretty = 1;
|
|
|
|
if (event->pevent->print_raw || (event->flags & EVENT_FL_PRINTRAW))
|
|
print_event_fields(s, record->data, record->size, event);
|
|
else {
|
|
|
|
if (event->handler && !(event->flags & EVENT_FL_NOHANDLE))
|
|
print_pretty = event->handler(s, record, event,
|
|
event->context);
|
|
|
|
if (print_pretty)
|
|
pretty_print(s, record->data, record->size, event);
|
|
}
|
|
|
|
trace_seq_terminate(s);
|
|
}
|
|
|
|
static bool is_timestamp_in_us(char *trace_clock, bool use_trace_clock)
|
|
{
|
|
if (!use_trace_clock)
|
|
return true;
|
|
|
|
if (!strcmp(trace_clock, "local") || !strcmp(trace_clock, "global")
|
|
|| !strcmp(trace_clock, "uptime") || !strcmp(trace_clock, "perf"))
|
|
return true;
|
|
|
|
/* trace_clock is setting in tsc or counter mode */
|
|
return false;
|
|
}
|
|
|
|
void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
|
|
struct pevent_record *record, bool use_trace_clock)
|
|
{
|
|
static const char *spaces = " "; /* 20 spaces */
|
|
struct event_format *event;
|
|
unsigned long secs;
|
|
unsigned long usecs;
|
|
unsigned long nsecs;
|
|
const char *comm;
|
|
void *data = record->data;
|
|
int type;
|
|
int pid;
|
|
int len;
|
|
int p;
|
|
bool use_usec_format;
|
|
|
|
use_usec_format = is_timestamp_in_us(pevent->trace_clock,
|
|
use_trace_clock);
|
|
if (use_usec_format) {
|
|
secs = record->ts / NSECS_PER_SEC;
|
|
nsecs = record->ts - secs * NSECS_PER_SEC;
|
|
}
|
|
|
|
if (record->size < 0) {
|
|
do_warning("ug! negative record size %d", record->size);
|
|
return;
|
|
}
|
|
|
|
type = trace_parse_common_type(pevent, data);
|
|
|
|
event = pevent_find_event(pevent, type);
|
|
if (!event) {
|
|
do_warning("ug! no event found for type %d", type);
|
|
return;
|
|
}
|
|
|
|
pid = parse_common_pid(pevent, data);
|
|
comm = find_cmdline(pevent, pid);
|
|
|
|
if (pevent->latency_format) {
|
|
trace_seq_printf(s, "%8.8s-%-5d %3d",
|
|
comm, pid, record->cpu);
|
|
pevent_data_lat_fmt(pevent, s, record);
|
|
} else
|
|
trace_seq_printf(s, "%16s-%-5d [%03d]", comm, pid, record->cpu);
|
|
|
|
if (use_usec_format) {
|
|
if (pevent->flags & PEVENT_NSEC_OUTPUT) {
|
|
usecs = nsecs;
|
|
p = 9;
|
|
} else {
|
|
usecs = (nsecs + 500) / NSECS_PER_USEC;
|
|
p = 6;
|
|
}
|
|
|
|
trace_seq_printf(s, " %5lu.%0*lu: %s: ",
|
|
secs, p, usecs, event->name);
|
|
} else
|
|
trace_seq_printf(s, " %12llu: %s: ",
|
|
record->ts, event->name);
|
|
|
|
/* Space out the event names evenly. */
|
|
len = strlen(event->name);
|
|
if (len < 20)
|
|
trace_seq_printf(s, "%.*s", 20 - len, spaces);
|
|
|
|
pevent_event_info(s, event, record);
|
|
}
|
|
|
|
static int events_id_cmp(const void *a, const void *b)
|
|
{
|
|
struct event_format * const * ea = a;
|
|
struct event_format * const * eb = b;
|
|
|
|
if ((*ea)->id < (*eb)->id)
|
|
return -1;
|
|
|
|
if ((*ea)->id > (*eb)->id)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int events_name_cmp(const void *a, const void *b)
|
|
{
|
|
struct event_format * const * ea = a;
|
|
struct event_format * const * eb = b;
|
|
int res;
|
|
|
|
res = strcmp((*ea)->name, (*eb)->name);
|
|
if (res)
|
|
return res;
|
|
|
|
res = strcmp((*ea)->system, (*eb)->system);
|
|
if (res)
|
|
return res;
|
|
|
|
return events_id_cmp(a, b);
|
|
}
|
|
|
|
static int events_system_cmp(const void *a, const void *b)
|
|
{
|
|
struct event_format * const * ea = a;
|
|
struct event_format * const * eb = b;
|
|
int res;
|
|
|
|
res = strcmp((*ea)->system, (*eb)->system);
|
|
if (res)
|
|
return res;
|
|
|
|
res = strcmp((*ea)->name, (*eb)->name);
|
|
if (res)
|
|
return res;
|
|
|
|
return events_id_cmp(a, b);
|
|
}
|
|
|
|
struct event_format **pevent_list_events(struct pevent *pevent, enum event_sort_type sort_type)
|
|
{
|
|
struct event_format **events;
|
|
int (*sort)(const void *a, const void *b);
|
|
|
|
events = pevent->sort_events;
|
|
|
|
if (events && pevent->last_type == sort_type)
|
|
return events;
|
|
|
|
if (!events) {
|
|
events = malloc(sizeof(*events) * (pevent->nr_events + 1));
|
|
if (!events)
|
|
return NULL;
|
|
|
|
memcpy(events, pevent->events, sizeof(*events) * pevent->nr_events);
|
|
events[pevent->nr_events] = NULL;
|
|
|
|
pevent->sort_events = events;
|
|
|
|
/* the internal events are sorted by id */
|
|
if (sort_type == EVENT_SORT_ID) {
|
|
pevent->last_type = sort_type;
|
|
return events;
|
|
}
|
|
}
|
|
|
|
switch (sort_type) {
|
|
case EVENT_SORT_ID:
|
|
sort = events_id_cmp;
|
|
break;
|
|
case EVENT_SORT_NAME:
|
|
sort = events_name_cmp;
|
|
break;
|
|
case EVENT_SORT_SYSTEM:
|
|
sort = events_system_cmp;
|
|
break;
|
|
default:
|
|
return events;
|
|
}
|
|
|
|
qsort(events, pevent->nr_events, sizeof(*events), sort);
|
|
pevent->last_type = sort_type;
|
|
|
|
return events;
|
|
}
|
|
|
|
static struct format_field **
|
|
get_event_fields(const char *type, const char *name,
|
|
int count, struct format_field *list)
|
|
{
|
|
struct format_field **fields;
|
|
struct format_field *field;
|
|
int i = 0;
|
|
|
|
fields = malloc(sizeof(*fields) * (count + 1));
|
|
if (!fields)
|
|
return NULL;
|
|
|
|
for (field = list; field; field = field->next) {
|
|
fields[i++] = field;
|
|
if (i == count + 1) {
|
|
do_warning("event %s has more %s fields than specified",
|
|
name, type);
|
|
i--;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (i != count)
|
|
do_warning("event %s has less %s fields than specified",
|
|
name, type);
|
|
|
|
fields[i] = NULL;
|
|
|
|
return fields;
|
|
}
|
|
|
|
/**
|
|
* pevent_event_common_fields - return a list of common fields for an event
|
|
* @event: the event to return the common fields of.
|
|
*
|
|
* Returns an allocated array of fields. The last item in the array is NULL.
|
|
* The array must be freed with free().
|
|
*/
|
|
struct format_field **pevent_event_common_fields(struct event_format *event)
|
|
{
|
|
return get_event_fields("common", event->name,
|
|
event->format.nr_common,
|
|
event->format.common_fields);
|
|
}
|
|
|
|
/**
|
|
* pevent_event_fields - return a list of event specific fields for an event
|
|
* @event: the event to return the fields of.
|
|
*
|
|
* Returns an allocated array of fields. The last item in the array is NULL.
|
|
* The array must be freed with free().
|
|
*/
|
|
struct format_field **pevent_event_fields(struct event_format *event)
|
|
{
|
|
return get_event_fields("event", event->name,
|
|
event->format.nr_fields,
|
|
event->format.fields);
|
|
}
|
|
|
|
static void print_fields(struct trace_seq *s, struct print_flag_sym *field)
|
|
{
|
|
trace_seq_printf(s, "{ %s, %s }", field->value, field->str);
|
|
if (field->next) {
|
|
trace_seq_puts(s, ", ");
|
|
print_fields(s, field->next);
|
|
}
|
|
}
|
|
|
|
/* for debugging */
|
|
static void print_args(struct print_arg *args)
|
|
{
|
|
int print_paren = 1;
|
|
struct trace_seq s;
|
|
|
|
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);
|
|
trace_seq_init(&s);
|
|
print_fields(&s, args->flags.flags);
|
|
trace_seq_do_printf(&s);
|
|
trace_seq_destroy(&s);
|
|
printf(")");
|
|
break;
|
|
case PRINT_SYMBOL:
|
|
printf("__print_symbolic(");
|
|
print_args(args->symbol.field);
|
|
printf(", ");
|
|
trace_seq_init(&s);
|
|
print_fields(&s, args->symbol.symbols);
|
|
trace_seq_do_printf(&s);
|
|
trace_seq_destroy(&s);
|
|
printf(")");
|
|
break;
|
|
case PRINT_HEX:
|
|
printf("__print_hex(");
|
|
print_args(args->hex.field);
|
|
printf(", ");
|
|
print_args(args->hex.size);
|
|
printf(")");
|
|
break;
|
|
case PRINT_STRING:
|
|
case PRINT_BSTRING:
|
|
printf("__get_str(%s)", args->string.string);
|
|
break;
|
|
case PRINT_BITMASK:
|
|
printf("__get_bitmask(%s)", args->bitmask.bitmask);
|
|
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);
|
|
}
|
|
}
|
|
|
|
static void parse_header_field(const char *field,
|
|
int *offset, int *size, int mandatory)
|
|
{
|
|
unsigned long long save_input_buf_ptr;
|
|
unsigned long long save_input_buf_siz;
|
|
char *token;
|
|
int type;
|
|
|
|
save_input_buf_ptr = input_buf_ptr;
|
|
save_input_buf_siz = input_buf_siz;
|
|
|
|
if (read_expected(EVENT_ITEM, "field") < 0)
|
|
return;
|
|
if (read_expected(EVENT_OP, ":") < 0)
|
|
return;
|
|
|
|
/* type */
|
|
if (read_expect_type(EVENT_ITEM, &token) < 0)
|
|
goto fail;
|
|
free_token(token);
|
|
|
|
/*
|
|
* If this is not a mandatory field, then test it first.
|
|
*/
|
|
if (mandatory) {
|
|
if (read_expected(EVENT_ITEM, field) < 0)
|
|
return;
|
|
} else {
|
|
if (read_expect_type(EVENT_ITEM, &token) < 0)
|
|
goto fail;
|
|
if (strcmp(token, field) != 0)
|
|
goto discard;
|
|
free_token(token);
|
|
}
|
|
|
|
if (read_expected(EVENT_OP, ";") < 0)
|
|
return;
|
|
if (read_expected(EVENT_ITEM, "offset") < 0)
|
|
return;
|
|
if (read_expected(EVENT_OP, ":") < 0)
|
|
return;
|
|
if (read_expect_type(EVENT_ITEM, &token) < 0)
|
|
goto fail;
|
|
*offset = atoi(token);
|
|
free_token(token);
|
|
if (read_expected(EVENT_OP, ";") < 0)
|
|
return;
|
|
if (read_expected(EVENT_ITEM, "size") < 0)
|
|
return;
|
|
if (read_expected(EVENT_OP, ":") < 0)
|
|
return;
|
|
if (read_expect_type(EVENT_ITEM, &token) < 0)
|
|
goto fail;
|
|
*size = atoi(token);
|
|
free_token(token);
|
|
if (read_expected(EVENT_OP, ";") < 0)
|
|
return;
|
|
type = read_token(&token);
|
|
if (type != EVENT_NEWLINE) {
|
|
/* newer versions of the kernel have a "signed" type */
|
|
if (type != EVENT_ITEM)
|
|
goto fail;
|
|
|
|
if (strcmp(token, "signed") != 0)
|
|
goto fail;
|
|
|
|
free_token(token);
|
|
|
|
if (read_expected(EVENT_OP, ":") < 0)
|
|
return;
|
|
|
|
if (read_expect_type(EVENT_ITEM, &token))
|
|
goto fail;
|
|
|
|
free_token(token);
|
|
if (read_expected(EVENT_OP, ";") < 0)
|
|
return;
|
|
|
|
if (read_expect_type(EVENT_NEWLINE, &token))
|
|
goto fail;
|
|
}
|
|
fail:
|
|
free_token(token);
|
|
return;
|
|
|
|
discard:
|
|
input_buf_ptr = save_input_buf_ptr;
|
|
input_buf_siz = save_input_buf_siz;
|
|
*offset = 0;
|
|
*size = 0;
|
|
free_token(token);
|
|
}
|
|
|
|
/**
|
|
* pevent_parse_header_page - parse the data stored in the header page
|
|
* @pevent: the handle to the pevent
|
|
* @buf: the buffer storing the header page format string
|
|
* @size: the size of @buf
|
|
* @long_size: the long size to use if there is no header
|
|
*
|
|
* This parses the header page format for information on the
|
|
* ring buffer used. The @buf should be copied from
|
|
*
|
|
* /sys/kernel/debug/tracing/events/header_page
|
|
*/
|
|
int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long size,
|
|
int long_size)
|
|
{
|
|
int ignore;
|
|
|
|
if (!size) {
|
|
/*
|
|
* Old kernels did not have header page info.
|
|
* Sorry but we just use what we find here in user space.
|
|
*/
|
|
pevent->header_page_ts_size = sizeof(long long);
|
|
pevent->header_page_size_size = long_size;
|
|
pevent->header_page_data_offset = sizeof(long long) + long_size;
|
|
pevent->old_format = 1;
|
|
return -1;
|
|
}
|
|
init_input_buf(buf, size);
|
|
|
|
parse_header_field("timestamp", &pevent->header_page_ts_offset,
|
|
&pevent->header_page_ts_size, 1);
|
|
parse_header_field("commit", &pevent->header_page_size_offset,
|
|
&pevent->header_page_size_size, 1);
|
|
parse_header_field("overwrite", &pevent->header_page_overwrite,
|
|
&ignore, 0);
|
|
parse_header_field("data", &pevent->header_page_data_offset,
|
|
&pevent->header_page_data_size, 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int event_matches(struct event_format *event,
|
|
int id, const char *sys_name,
|
|
const char *event_name)
|
|
{
|
|
if (id >= 0 && id != event->id)
|
|
return 0;
|
|
|
|
if (event_name && (strcmp(event_name, event->name) != 0))
|
|
return 0;
|
|
|
|
if (sys_name && (strcmp(sys_name, event->system) != 0))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void free_handler(struct event_handler *handle)
|
|
{
|
|
free((void *)handle->sys_name);
|
|
free((void *)handle->event_name);
|
|
free(handle);
|
|
}
|
|
|
|
static int find_event_handle(struct pevent *pevent, struct event_format *event)
|
|
{
|
|
struct event_handler *handle, **next;
|
|
|
|
for (next = &pevent->handlers; *next;
|
|
next = &(*next)->next) {
|
|
handle = *next;
|
|
if (event_matches(event, handle->id,
|
|
handle->sys_name,
|
|
handle->event_name))
|
|
break;
|
|
}
|
|
|
|
if (!(*next))
|
|
return 0;
|
|
|
|
pr_stat("overriding event (%d) %s:%s with new print handler",
|
|
event->id, event->system, event->name);
|
|
|
|
event->handler = handle->func;
|
|
event->context = handle->context;
|
|
|
|
*next = handle->next;
|
|
free_handler(handle);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* __pevent_parse_format - parse the event format
|
|
* @buf: the buffer storing the event format string
|
|
* @size: the size of @buf
|
|
* @sys: the system the event belongs to
|
|
*
|
|
* This parses the event format and creates an event structure
|
|
* to quickly parse raw data for a given event.
|
|
*
|
|
* These files currently come from:
|
|
*
|
|
* /sys/kernel/debug/tracing/events/.../.../format
|
|
*/
|
|
enum pevent_errno __pevent_parse_format(struct event_format **eventp,
|
|
struct pevent *pevent, const char *buf,
|
|
unsigned long size, const char *sys)
|
|
{
|
|
struct event_format *event;
|
|
int ret;
|
|
|
|
init_input_buf(buf, size);
|
|
|
|
*eventp = event = alloc_event();
|
|
if (!event)
|
|
return PEVENT_ERRNO__MEM_ALLOC_FAILED;
|
|
|
|
event->name = event_read_name();
|
|
if (!event->name) {
|
|
/* Bad event? */
|
|
ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
|
|
goto event_alloc_failed;
|
|
}
|
|
|
|
if (strcmp(sys, "ftrace") == 0) {
|
|
event->flags |= EVENT_FL_ISFTRACE;
|
|
|
|
if (strcmp(event->name, "bprint") == 0)
|
|
event->flags |= EVENT_FL_ISBPRINT;
|
|
}
|
|
|
|
event->id = event_read_id();
|
|
if (event->id < 0) {
|
|
ret = PEVENT_ERRNO__READ_ID_FAILED;
|
|
/*
|
|
* This isn't an allocation error actually.
|
|
* But as the ID is critical, just bail out.
|
|
*/
|
|
goto event_alloc_failed;
|
|
}
|
|
|
|
event->system = strdup(sys);
|
|
if (!event->system) {
|
|
ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
|
|
goto event_alloc_failed;
|
|
}
|
|
|
|
/* Add pevent to event so that it can be referenced */
|
|
event->pevent = pevent;
|
|
|
|
ret = event_read_format(event);
|
|
if (ret < 0) {
|
|
ret = PEVENT_ERRNO__READ_FORMAT_FAILED;
|
|
goto event_parse_failed;
|
|
}
|
|
|
|
/*
|
|
* If the event has an override, don't print warnings if the event
|
|
* print format fails to parse.
|
|
*/
|
|
if (pevent && find_event_handle(pevent, event))
|
|
show_warning = 0;
|
|
|
|
ret = event_read_print(event);
|
|
show_warning = 1;
|
|
|
|
if (ret < 0) {
|
|
ret = PEVENT_ERRNO__READ_PRINT_FAILED;
|
|
goto event_parse_failed;
|
|
}
|
|
|
|
if (!ret && (event->flags & EVENT_FL_ISFTRACE)) {
|
|
struct format_field *field;
|
|
struct print_arg *arg, **list;
|
|
|
|
/* old ftrace had no args */
|
|
list = &event->print_fmt.args;
|
|
for (field = event->format.fields; field; field = field->next) {
|
|
arg = alloc_arg();
|
|
if (!arg) {
|
|
event->flags |= EVENT_FL_FAILED;
|
|
return PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED;
|
|
}
|
|
arg->type = PRINT_FIELD;
|
|
arg->field.name = strdup(field->name);
|
|
if (!arg->field.name) {
|
|
event->flags |= EVENT_FL_FAILED;
|
|
free_arg(arg);
|
|
return PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED;
|
|
}
|
|
arg->field.field = field;
|
|
*list = arg;
|
|
list = &arg->next;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
return 0;
|
|
|
|
event_parse_failed:
|
|
event->flags |= EVENT_FL_FAILED;
|
|
return ret;
|
|
|
|
event_alloc_failed:
|
|
free(event->system);
|
|
free(event->name);
|
|
free(event);
|
|
*eventp = NULL;
|
|
return ret;
|
|
}
|
|
|
|
static enum pevent_errno
|
|
__pevent_parse_event(struct pevent *pevent,
|
|
struct event_format **eventp,
|
|
const char *buf, unsigned long size,
|
|
const char *sys)
|
|
{
|
|
int ret = __pevent_parse_format(eventp, pevent, buf, size, sys);
|
|
struct event_format *event = *eventp;
|
|
|
|
if (event == NULL)
|
|
return ret;
|
|
|
|
if (pevent && add_event(pevent, event)) {
|
|
ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
|
|
goto event_add_failed;
|
|
}
|
|
|
|
#define PRINT_ARGS 0
|
|
if (PRINT_ARGS && event->print_fmt.args)
|
|
print_args(event->print_fmt.args);
|
|
|
|
return 0;
|
|
|
|
event_add_failed:
|
|
pevent_free_format(event);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* pevent_parse_format - parse the event format
|
|
* @pevent: the handle to the pevent
|
|
* @eventp: returned format
|
|
* @buf: the buffer storing the event format string
|
|
* @size: the size of @buf
|
|
* @sys: the system the event belongs to
|
|
*
|
|
* This parses the event format and creates an event structure
|
|
* to quickly parse raw data for a given event.
|
|
*
|
|
* These files currently come from:
|
|
*
|
|
* /sys/kernel/debug/tracing/events/.../.../format
|
|
*/
|
|
enum pevent_errno pevent_parse_format(struct pevent *pevent,
|
|
struct event_format **eventp,
|
|
const char *buf,
|
|
unsigned long size, const char *sys)
|
|
{
|
|
return __pevent_parse_event(pevent, eventp, buf, size, sys);
|
|
}
|
|
|
|
/**
|
|
* pevent_parse_event - parse the event format
|
|
* @pevent: the handle to the pevent
|
|
* @buf: the buffer storing the event format string
|
|
* @size: the size of @buf
|
|
* @sys: the system the event belongs to
|
|
*
|
|
* This parses the event format and creates an event structure
|
|
* to quickly parse raw data for a given event.
|
|
*
|
|
* These files currently come from:
|
|
*
|
|
* /sys/kernel/debug/tracing/events/.../.../format
|
|
*/
|
|
enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf,
|
|
unsigned long size, const char *sys)
|
|
{
|
|
struct event_format *event = NULL;
|
|
return __pevent_parse_event(pevent, &event, buf, size, sys);
|
|
}
|
|
|
|
#undef _PE
|
|
#define _PE(code, str) str
|
|
static const char * const pevent_error_str[] = {
|
|
PEVENT_ERRORS
|
|
};
|
|
#undef _PE
|
|
|
|
int pevent_strerror(struct pevent *pevent __maybe_unused,
|
|
enum pevent_errno errnum, char *buf, size_t buflen)
|
|
{
|
|
int idx;
|
|
const char *msg;
|
|
|
|
if (errnum >= 0) {
|
|
msg = strerror_r(errnum, buf, buflen);
|
|
if (msg != buf) {
|
|
size_t len = strlen(msg);
|
|
memcpy(buf, msg, min(buflen - 1, len));
|
|
*(buf + min(buflen - 1, len)) = '\0';
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
if (errnum <= __PEVENT_ERRNO__START ||
|
|
errnum >= __PEVENT_ERRNO__END)
|
|
return -1;
|
|
|
|
idx = errnum - __PEVENT_ERRNO__START - 1;
|
|
msg = pevent_error_str[idx];
|
|
snprintf(buf, buflen, "%s", msg);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int get_field_val(struct trace_seq *s, struct format_field *field,
|
|
const char *name, struct pevent_record *record,
|
|
unsigned long long *val, int err)
|
|
{
|
|
if (!field) {
|
|
if (err)
|
|
trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
|
|
return -1;
|
|
}
|
|
|
|
if (pevent_read_number_field(field, record->data, val)) {
|
|
if (err)
|
|
trace_seq_printf(s, " %s=INVALID", name);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pevent_get_field_raw - return the raw pointer into the data field
|
|
* @s: The seq to print to on error
|
|
* @event: the event that the field is for
|
|
* @name: The name of the field
|
|
* @record: The record with the field name.
|
|
* @len: place to store the field length.
|
|
* @err: print default error if failed.
|
|
*
|
|
* Returns a pointer into record->data of the field and places
|
|
* the length of the field in @len.
|
|
*
|
|
* On failure, it returns NULL.
|
|
*/
|
|
void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event,
|
|
const char *name, struct pevent_record *record,
|
|
int *len, int err)
|
|
{
|
|
struct format_field *field;
|
|
void *data = record->data;
|
|
unsigned offset;
|
|
int dummy;
|
|
|
|
if (!event)
|
|
return NULL;
|
|
|
|
field = pevent_find_field(event, name);
|
|
|
|
if (!field) {
|
|
if (err)
|
|
trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
|
|
return NULL;
|
|
}
|
|
|
|
/* Allow @len to be NULL */
|
|
if (!len)
|
|
len = &dummy;
|
|
|
|
offset = field->offset;
|
|
if (field->flags & FIELD_IS_DYNAMIC) {
|
|
offset = pevent_read_number(event->pevent,
|
|
data + offset, field->size);
|
|
*len = offset >> 16;
|
|
offset &= 0xffff;
|
|
} else
|
|
*len = field->size;
|
|
|
|
return data + offset;
|
|
}
|
|
|
|
/**
|
|
* pevent_get_field_val - find a field and return its value
|
|
* @s: The seq to print to on error
|
|
* @event: the event that the field is for
|
|
* @name: The name of the field
|
|
* @record: The record with the field name.
|
|
* @val: place to store the value of the field.
|
|
* @err: print default error if failed.
|
|
*
|
|
* Returns 0 on success -1 on field not found.
|
|
*/
|
|
int pevent_get_field_val(struct trace_seq *s, struct event_format *event,
|
|
const char *name, struct pevent_record *record,
|
|
unsigned long long *val, int err)
|
|
{
|
|
struct format_field *field;
|
|
|
|
if (!event)
|
|
return -1;
|
|
|
|
field = pevent_find_field(event, name);
|
|
|
|
return get_field_val(s, field, name, record, val, err);
|
|
}
|
|
|
|
/**
|
|
* pevent_get_common_field_val - find a common field and return its value
|
|
* @s: The seq to print to on error
|
|
* @event: the event that the field is for
|
|
* @name: The name of the field
|
|
* @record: The record with the field name.
|
|
* @val: place to store the value of the field.
|
|
* @err: print default error if failed.
|
|
*
|
|
* Returns 0 on success -1 on field not found.
|
|
*/
|
|
int pevent_get_common_field_val(struct trace_seq *s, struct event_format *event,
|
|
const char *name, struct pevent_record *record,
|
|
unsigned long long *val, int err)
|
|
{
|
|
struct format_field *field;
|
|
|
|
if (!event)
|
|
return -1;
|
|
|
|
field = pevent_find_common_field(event, name);
|
|
|
|
return get_field_val(s, field, name, record, val, err);
|
|
}
|
|
|
|
/**
|
|
* pevent_get_any_field_val - find a any field and return its value
|
|
* @s: The seq to print to on error
|
|
* @event: the event that the field is for
|
|
* @name: The name of the field
|
|
* @record: The record with the field name.
|
|
* @val: place to store the value of the field.
|
|
* @err: print default error if failed.
|
|
*
|
|
* Returns 0 on success -1 on field not found.
|
|
*/
|
|
int pevent_get_any_field_val(struct trace_seq *s, struct event_format *event,
|
|
const char *name, struct pevent_record *record,
|
|
unsigned long long *val, int err)
|
|
{
|
|
struct format_field *field;
|
|
|
|
if (!event)
|
|
return -1;
|
|
|
|
field = pevent_find_any_field(event, name);
|
|
|
|
return get_field_val(s, field, name, record, val, err);
|
|
}
|
|
|
|
/**
|
|
* pevent_print_num_field - print a field and a format
|
|
* @s: The seq to print to
|
|
* @fmt: The printf format to print the field with.
|
|
* @event: the event that the field is for
|
|
* @name: The name of the field
|
|
* @record: The record with the field name.
|
|
* @err: print default error if failed.
|
|
*
|
|
* Returns: 0 on success, -1 field not found, or 1 if buffer is full.
|
|
*/
|
|
int pevent_print_num_field(struct trace_seq *s, const char *fmt,
|
|
struct event_format *event, const char *name,
|
|
struct pevent_record *record, int err)
|
|
{
|
|
struct format_field *field = pevent_find_field(event, name);
|
|
unsigned long long val;
|
|
|
|
if (!field)
|
|
goto failed;
|
|
|
|
if (pevent_read_number_field(field, record->data, &val))
|
|
goto failed;
|
|
|
|
return trace_seq_printf(s, fmt, val);
|
|
|
|
failed:
|
|
if (err)
|
|
trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* pevent_print_func_field - print a field and a format for function pointers
|
|
* @s: The seq to print to
|
|
* @fmt: The printf format to print the field with.
|
|
* @event: the event that the field is for
|
|
* @name: The name of the field
|
|
* @record: The record with the field name.
|
|
* @err: print default error if failed.
|
|
*
|
|
* Returns: 0 on success, -1 field not found, or 1 if buffer is full.
|
|
*/
|
|
int pevent_print_func_field(struct trace_seq *s, const char *fmt,
|
|
struct event_format *event, const char *name,
|
|
struct pevent_record *record, int err)
|
|
{
|
|
struct format_field *field = pevent_find_field(event, name);
|
|
struct pevent *pevent = event->pevent;
|
|
unsigned long long val;
|
|
struct func_map *func;
|
|
char tmp[128];
|
|
|
|
if (!field)
|
|
goto failed;
|
|
|
|
if (pevent_read_number_field(field, record->data, &val))
|
|
goto failed;
|
|
|
|
func = find_func(pevent, val);
|
|
|
|
if (func)
|
|
snprintf(tmp, 128, "%s/0x%llx", func->func, func->addr - val);
|
|
else
|
|
sprintf(tmp, "0x%08llx", val);
|
|
|
|
return trace_seq_printf(s, fmt, tmp);
|
|
|
|
failed:
|
|
if (err)
|
|
trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
|
|
return -1;
|
|
}
|
|
|
|
static void free_func_handle(struct pevent_function_handler *func)
|
|
{
|
|
struct pevent_func_params *params;
|
|
|
|
free(func->name);
|
|
|
|
while (func->params) {
|
|
params = func->params;
|
|
func->params = params->next;
|
|
free(params);
|
|
}
|
|
|
|
free(func);
|
|
}
|
|
|
|
/**
|
|
* pevent_register_print_function - register a helper function
|
|
* @pevent: the handle to the pevent
|
|
* @func: the function to process the helper function
|
|
* @ret_type: the return type of the helper function
|
|
* @name: the name of the helper function
|
|
* @parameters: A list of enum pevent_func_arg_type
|
|
*
|
|
* Some events may have helper functions in the print format arguments.
|
|
* This allows a plugin to dynamically create a way to process one
|
|
* of these functions.
|
|
*
|
|
* The @parameters is a variable list of pevent_func_arg_type enums that
|
|
* must end with PEVENT_FUNC_ARG_VOID.
|
|
*/
|
|
int pevent_register_print_function(struct pevent *pevent,
|
|
pevent_func_handler func,
|
|
enum pevent_func_arg_type ret_type,
|
|
char *name, ...)
|
|
{
|
|
struct pevent_function_handler *func_handle;
|
|
struct pevent_func_params **next_param;
|
|
struct pevent_func_params *param;
|
|
enum pevent_func_arg_type type;
|
|
va_list ap;
|
|
int ret;
|
|
|
|
func_handle = find_func_handler(pevent, name);
|
|
if (func_handle) {
|
|
/*
|
|
* This is most like caused by the users own
|
|
* plugins updating the function. This overrides the
|
|
* system defaults.
|
|
*/
|
|
pr_stat("override of function helper '%s'", name);
|
|
remove_func_handler(pevent, name);
|
|
}
|
|
|
|
func_handle = calloc(1, sizeof(*func_handle));
|
|
if (!func_handle) {
|
|
do_warning("Failed to allocate function handler");
|
|
return PEVENT_ERRNO__MEM_ALLOC_FAILED;
|
|
}
|
|
|
|
func_handle->ret_type = ret_type;
|
|
func_handle->name = strdup(name);
|
|
func_handle->func = func;
|
|
if (!func_handle->name) {
|
|
do_warning("Failed to allocate function name");
|
|
free(func_handle);
|
|
return PEVENT_ERRNO__MEM_ALLOC_FAILED;
|
|
}
|
|
|
|
next_param = &(func_handle->params);
|
|
va_start(ap, name);
|
|
for (;;) {
|
|
type = va_arg(ap, enum pevent_func_arg_type);
|
|
if (type == PEVENT_FUNC_ARG_VOID)
|
|
break;
|
|
|
|
if (type >= PEVENT_FUNC_ARG_MAX_TYPES) {
|
|
do_warning("Invalid argument type %d", type);
|
|
ret = PEVENT_ERRNO__INVALID_ARG_TYPE;
|
|
goto out_free;
|
|
}
|
|
|
|
param = malloc(sizeof(*param));
|
|
if (!param) {
|
|
do_warning("Failed to allocate function param");
|
|
ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
|
|
goto out_free;
|
|
}
|
|
param->type = type;
|
|
param->next = NULL;
|
|
|
|
*next_param = param;
|
|
next_param = &(param->next);
|
|
|
|
func_handle->nr_args++;
|
|
}
|
|
va_end(ap);
|
|
|
|
func_handle->next = pevent->func_handlers;
|
|
pevent->func_handlers = func_handle;
|
|
|
|
return 0;
|
|
out_free:
|
|
va_end(ap);
|
|
free_func_handle(func_handle);
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* pevent_unregister_print_function - unregister a helper function
|
|
* @pevent: the handle to the pevent
|
|
* @func: the function to process the helper function
|
|
* @name: the name of the helper function
|
|
*
|
|
* This function removes existing print handler for function @name.
|
|
*
|
|
* Returns 0 if the handler was removed successully, -1 otherwise.
|
|
*/
|
|
int pevent_unregister_print_function(struct pevent *pevent,
|
|
pevent_func_handler func, char *name)
|
|
{
|
|
struct pevent_function_handler *func_handle;
|
|
|
|
func_handle = find_func_handler(pevent, name);
|
|
if (func_handle && func_handle->func == func) {
|
|
remove_func_handler(pevent, name);
|
|
return 0;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static struct event_format *pevent_search_event(struct pevent *pevent, int id,
|
|
const char *sys_name,
|
|
const char *event_name)
|
|
{
|
|
struct event_format *event;
|
|
|
|
if (id >= 0) {
|
|
/* search by id */
|
|
event = pevent_find_event(pevent, id);
|
|
if (!event)
|
|
return NULL;
|
|
if (event_name && (strcmp(event_name, event->name) != 0))
|
|
return NULL;
|
|
if (sys_name && (strcmp(sys_name, event->system) != 0))
|
|
return NULL;
|
|
} else {
|
|
event = pevent_find_event_by_name(pevent, sys_name, event_name);
|
|
if (!event)
|
|
return NULL;
|
|
}
|
|
return event;
|
|
}
|
|
|
|
/**
|
|
* pevent_register_event_handler - register a way to parse an event
|
|
* @pevent: the handle to the pevent
|
|
* @id: the id of the event to register
|
|
* @sys_name: the system name the event belongs to
|
|
* @event_name: the name of the event
|
|
* @func: the function to call to parse the event information
|
|
* @context: the data to be passed to @func
|
|
*
|
|
* This function allows a developer to override the parsing of
|
|
* a given event. If for some reason the default print format
|
|
* is not sufficient, this function will register a function
|
|
* for an event to be used to parse the data instead.
|
|
*
|
|
* If @id is >= 0, then it is used to find the event.
|
|
* else @sys_name and @event_name are used.
|
|
*/
|
|
int pevent_register_event_handler(struct pevent *pevent, int id,
|
|
const char *sys_name, const char *event_name,
|
|
pevent_event_handler_func func, void *context)
|
|
{
|
|
struct event_format *event;
|
|
struct event_handler *handle;
|
|
|
|
event = pevent_search_event(pevent, id, sys_name, event_name);
|
|
if (event == NULL)
|
|
goto not_found;
|
|
|
|
pr_stat("overriding event (%d) %s:%s with new print handler",
|
|
event->id, event->system, event->name);
|
|
|
|
event->handler = func;
|
|
event->context = context;
|
|
return 0;
|
|
|
|
not_found:
|
|
/* Save for later use. */
|
|
handle = calloc(1, sizeof(*handle));
|
|
if (!handle) {
|
|
do_warning("Failed to allocate event handler");
|
|
return PEVENT_ERRNO__MEM_ALLOC_FAILED;
|
|
}
|
|
|
|
handle->id = id;
|
|
if (event_name)
|
|
handle->event_name = strdup(event_name);
|
|
if (sys_name)
|
|
handle->sys_name = strdup(sys_name);
|
|
|
|
if ((event_name && !handle->event_name) ||
|
|
(sys_name && !handle->sys_name)) {
|
|
do_warning("Failed to allocate event/sys name");
|
|
free((void *)handle->event_name);
|
|
free((void *)handle->sys_name);
|
|
free(handle);
|
|
return PEVENT_ERRNO__MEM_ALLOC_FAILED;
|
|
}
|
|
|
|
handle->func = func;
|
|
handle->next = pevent->handlers;
|
|
pevent->handlers = handle;
|
|
handle->context = context;
|
|
|
|
return -1;
|
|
}
|
|
|
|
static int handle_matches(struct event_handler *handler, int id,
|
|
const char *sys_name, const char *event_name,
|
|
pevent_event_handler_func func, void *context)
|
|
{
|
|
if (id >= 0 && id != handler->id)
|
|
return 0;
|
|
|
|
if (event_name && (strcmp(event_name, handler->event_name) != 0))
|
|
return 0;
|
|
|
|
if (sys_name && (strcmp(sys_name, handler->sys_name) != 0))
|
|
return 0;
|
|
|
|
if (func != handler->func || context != handler->context)
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* pevent_unregister_event_handler - unregister an existing event handler
|
|
* @pevent: the handle to the pevent
|
|
* @id: the id of the event to unregister
|
|
* @sys_name: the system name the handler belongs to
|
|
* @event_name: the name of the event handler
|
|
* @func: the function to call to parse the event information
|
|
* @context: the data to be passed to @func
|
|
*
|
|
* This function removes existing event handler (parser).
|
|
*
|
|
* If @id is >= 0, then it is used to find the event.
|
|
* else @sys_name and @event_name are used.
|
|
*
|
|
* Returns 0 if handler was removed successfully, -1 if event was not found.
|
|
*/
|
|
int pevent_unregister_event_handler(struct pevent *pevent, int id,
|
|
const char *sys_name, const char *event_name,
|
|
pevent_event_handler_func func, void *context)
|
|
{
|
|
struct event_format *event;
|
|
struct event_handler *handle;
|
|
struct event_handler **next;
|
|
|
|
event = pevent_search_event(pevent, id, sys_name, event_name);
|
|
if (event == NULL)
|
|
goto not_found;
|
|
|
|
if (event->handler == func && event->context == context) {
|
|
pr_stat("removing override handler for event (%d) %s:%s. Going back to default handler.",
|
|
event->id, event->system, event->name);
|
|
|
|
event->handler = NULL;
|
|
event->context = NULL;
|
|
return 0;
|
|
}
|
|
|
|
not_found:
|
|
for (next = &pevent->handlers; *next; next = &(*next)->next) {
|
|
handle = *next;
|
|
if (handle_matches(handle, id, sys_name, event_name,
|
|
func, context))
|
|
break;
|
|
}
|
|
|
|
if (!(*next))
|
|
return -1;
|
|
|
|
*next = handle->next;
|
|
free_handler(handle);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* pevent_alloc - create a pevent handle
|
|
*/
|
|
struct pevent *pevent_alloc(void)
|
|
{
|
|
struct pevent *pevent = calloc(1, sizeof(*pevent));
|
|
|
|
if (pevent)
|
|
pevent->ref_count = 1;
|
|
|
|
return pevent;
|
|
}
|
|
|
|
void pevent_ref(struct pevent *pevent)
|
|
{
|
|
pevent->ref_count++;
|
|
}
|
|
|
|
static void free_format_fields(struct format_field *field)
|
|
{
|
|
struct format_field *next;
|
|
|
|
while (field) {
|
|
next = field->next;
|
|
free(field->type);
|
|
free(field->name);
|
|
free(field);
|
|
field = next;
|
|
}
|
|
}
|
|
|
|
static void free_formats(struct format *format)
|
|
{
|
|
free_format_fields(format->common_fields);
|
|
free_format_fields(format->fields);
|
|
}
|
|
|
|
void pevent_free_format(struct event_format *event)
|
|
{
|
|
free(event->name);
|
|
free(event->system);
|
|
|
|
free_formats(&event->format);
|
|
|
|
free(event->print_fmt.format);
|
|
free_args(event->print_fmt.args);
|
|
|
|
free(event);
|
|
}
|
|
|
|
/**
|
|
* pevent_free - free a pevent handle
|
|
* @pevent: the pevent handle to free
|
|
*/
|
|
void pevent_free(struct pevent *pevent)
|
|
{
|
|
struct cmdline_list *cmdlist, *cmdnext;
|
|
struct func_list *funclist, *funcnext;
|
|
struct printk_list *printklist, *printknext;
|
|
struct pevent_function_handler *func_handler;
|
|
struct event_handler *handle;
|
|
int i;
|
|
|
|
if (!pevent)
|
|
return;
|
|
|
|
cmdlist = pevent->cmdlist;
|
|
funclist = pevent->funclist;
|
|
printklist = pevent->printklist;
|
|
|
|
pevent->ref_count--;
|
|
if (pevent->ref_count)
|
|
return;
|
|
|
|
if (pevent->cmdlines) {
|
|
for (i = 0; i < pevent->cmdline_count; i++)
|
|
free(pevent->cmdlines[i].comm);
|
|
free(pevent->cmdlines);
|
|
}
|
|
|
|
while (cmdlist) {
|
|
cmdnext = cmdlist->next;
|
|
free(cmdlist->comm);
|
|
free(cmdlist);
|
|
cmdlist = cmdnext;
|
|
}
|
|
|
|
if (pevent->func_map) {
|
|
for (i = 0; i < (int)pevent->func_count; i++) {
|
|
free(pevent->func_map[i].func);
|
|
free(pevent->func_map[i].mod);
|
|
}
|
|
free(pevent->func_map);
|
|
}
|
|
|
|
while (funclist) {
|
|
funcnext = funclist->next;
|
|
free(funclist->func);
|
|
free(funclist->mod);
|
|
free(funclist);
|
|
funclist = funcnext;
|
|
}
|
|
|
|
while (pevent->func_handlers) {
|
|
func_handler = pevent->func_handlers;
|
|
pevent->func_handlers = func_handler->next;
|
|
free_func_handle(func_handler);
|
|
}
|
|
|
|
if (pevent->printk_map) {
|
|
for (i = 0; i < (int)pevent->printk_count; i++)
|
|
free(pevent->printk_map[i].printk);
|
|
free(pevent->printk_map);
|
|
}
|
|
|
|
while (printklist) {
|
|
printknext = printklist->next;
|
|
free(printklist->printk);
|
|
free(printklist);
|
|
printklist = printknext;
|
|
}
|
|
|
|
for (i = 0; i < pevent->nr_events; i++)
|
|
pevent_free_format(pevent->events[i]);
|
|
|
|
while (pevent->handlers) {
|
|
handle = pevent->handlers;
|
|
pevent->handlers = handle->next;
|
|
free_handler(handle);
|
|
}
|
|
|
|
free(pevent->events);
|
|
free(pevent->sort_events);
|
|
|
|
free(pevent);
|
|
}
|
|
|
|
void pevent_unref(struct pevent *pevent)
|
|
{
|
|
pevent_free(pevent);
|
|
}
|