+++ /dev/null
-/*
- * 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.
- */
-#define _GNU_SOURCE
-#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)
-
-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);
-}
-
-static 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 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;
-}
-
-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, char *fmt,
- unsigned long long addr)
-{
- struct printk_list *item = malloc(sizeof(*item));
-
- if (!item)
- return -1;
-
- item->next = pevent->printklist;
- item->addr = addr;
-
- item->printk = strdup(fmt);
- if (!item->printk)
- goto out_free;
-
- 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_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 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 {
- 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("%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("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);
- 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;
-
- /* add signed type */
-
- 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_STRING)
- field->elementsize = 1;
- else
- field->elementsize = event->pevent->long_size;
- } 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);
-
-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("%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("%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("bad op token %s", token);
- goto out_free;
- }
- switch (token[0]) {
- case '~':
- case '!':
- case '+':
- case '-':
- break;
- default:
- do_warning("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) {
-
- 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("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("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("%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:
- 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:
- 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("%s: not enough memory!", __func__);
- goto out_free;
- }
-
- type = process_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("%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_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("%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("%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 (!field) {
- do_warning("%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("previous needed to be PRINT_ATOM");
- goto out_free;
- }
-
- item_arg = alloc_arg();
- if (!item_arg) {
- do_warning("%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 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;
- char *test;
- 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("%s: not enough memory!", __func__);
- return EVENT_ERROR;
- }
-
- type = process_arg(event, farg, &token);
- if (i < (func->nr_args - 1))
- test = ",";
- else
- test = ")";
-
- if (test_type_token(type, token, EVENT_DELIM, test)) {
- free_arg(farg);
- free_token(token);
- return EVENT_ERROR;
- }
-
- *next_arg = farg;
- next_arg = &(farg->next);
- free_token(token);
- }
-
- type = read_token(&token);
- *tok = token;
-
- return type;
-}
-
-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_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("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("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("%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 = NULL;
- 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:
- 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;
- default: /* not sure what to do there */
- return 0;
- }
- return val;
-
-out_warning_op:
- do_warning("%s: unknown op '%s'", __func__, arg->op.op);
- return 0;
-
-out_warning_field:
- do_warning("%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_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;
- 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);
- trace_seq_printf(s, "%lx", addr);
- break;
- }
- str = malloc(len + 1);
- if (!str) {
- do_warning("%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:
- 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_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("%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("%s(%d): malloc str", __func__, __LINE__);
- goto out_free;
- }
- string->next = strings;
- string->str = strdup(str.buffer);
- if (!string->str) {
- free(string);
- do_warning("%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("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("can't find buffer field for binary printk");
- return NULL;
- }
- ip_field = pevent_find_field(event, "ip");
- if (!ip_field) {
- do_warning("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("%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 + 6, bptr = data + field->offset;
- bptr < data + size && *ptr; ptr++) {
- int ls = 0;
-
- if (*ptr == '%') {
- process_again:
- ptr++;
- switch (*ptr) {
- case '%':
- break;
- case 'l':
- ls++;
- goto process_again;
- case 'L':
- ls = 2;
- goto process_again;
- case '0' ... '9':
- goto process_again;
- case '.':
- 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("%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("%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;
- char *p;
-
- field = pevent->bprint_fmt_field;
-
- if (!field) {
- field = pevent_find_field(event, "fmt");
- if (!field) {
- do_warning("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;
- }
-
- p = printk->printk;
- /* Remove any quotes. */
- if (*p == '"')
- p++;
- if (asprintf(&format, "%s : %s", "%pf", p) < 0)
- return NULL;
- /* remove ending quotes and new line since we will add one too */
- p = format + strlen(format) - 1;
- if (*p == '"')
- *p = 0;
-
- p -= 2;
- if (strcmp(p, "\\n") == 0)
- *p = 0;
-
- return format;
-}
-
-static void print_mac_arg(struct trace_seq *s, int mac, void *data, int size,
- struct event_format *event, struct print_arg *arg)
-{
- unsigned char *buf;
- 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("%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]))
- return 0;
- return 1;
-}
-
-static void print_event_fields(struct trace_seq *s, void *data, int size,
- 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;
- char *bprint_fmt = NULL;
- char format[32];
- int show_func;
- int len_as_arg;
- int len_arg = 0;
- 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("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("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("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("bad count (%d)", ls);
- event->flags |= EVENT_FL_FAILED;
- }
- break;
- case 's':
- if (!arg) {
- do_warning("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("bad format!");
- event->flags |= EVENT_FL_FAILED;
- len = 31;
- }
-
- memcpy(format, saveptr, len);
- format[len] = 0;
- if (!len_as_arg)
- len_arg = -1;
- print_str_arg(s, data, size, event,
- format, len_arg, arg);
- 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 = 0;
- int migrate_disable = 0;
- 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);
-}
-
-void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
- struct pevent_record *record)
-{
- static 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;
-
- 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 (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);
-
- /* 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_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
- */
-static 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;
-}
-
-/**
- * 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, const char *buf,
- unsigned long size, const char *sys)
-{
- return __pevent_parse_format(eventp, NULL, 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;
- int ret = __pevent_parse_format(&event, pevent, buf, size, sys);
-
- if (event == NULL)
- return ret;
-
- if (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;
-}
-
-#undef _PE
-#define _PE(code, str) str
-static const char * const pevent_error_str[] = {
- PEVENT_ERRORS
-};
-#undef _PE
-
-int pevent_strerror(struct pevent *pevent, enum pevent_errno errnum,
- char *buf, size_t buflen)
-{
- int idx;
- const char *msg;
-
- if (errnum >= 0) {
-#if defined(__GLIBC__)
- msg = strerror_r(errnum, buf, buflen);
-#else
- if (strerror_r(errnum, buf, buflen) != 0)
- snprintf(buf, buflen, "unknown error %i", errnum);
- msg = buf;
-#endif
- 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];
-
- switch (errnum) {
- case PEVENT_ERRNO__MEM_ALLOC_FAILED:
- case PEVENT_ERRNO__PARSE_EVENT_FAILED:
- case PEVENT_ERRNO__READ_ID_FAILED:
- case PEVENT_ERRNO__READ_FORMAT_FAILED:
- case PEVENT_ERRNO__READ_PRINT_FAILED:
- case PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED:
- snprintf(buf, buflen, "%s", msg);
- break;
-
- default:
- /* cannot reach here */
- break;
- }
-
- return 0;
-}
-
-static 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 < 0 || 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_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, char *sys_name, char *event_name,
- pevent_event_handler_func func,
- void *context)
-{
- struct event_format *event;
- struct event_handler *handle;
-
- if (id >= 0) {
- /* search by id */
- event = pevent_find_event(pevent, id);
- if (!event)
- goto not_found;
- if (event_name && (strcmp(event_name, event->name) != 0))
- goto not_found;
- if (sys_name && (strcmp(sys_name, event->system) != 0))
- goto not_found;
- } else {
- event = pevent_find_event_by_name(pevent, sys_name, event_name);
- if (!event)
- 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;
-}
-
-/**
- * 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 < 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 < 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);
-}
+++ /dev/null
-/*
- * Copyright (C) 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>
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- */
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <stdarg.h>
-#include <errno.h>
-#include <sys/types.h>
-
-#include "event-parse.h"
-#include "event-utils.h"
-
-#define COMM "COMM"
-
-static struct format_field comm = {
- .name = "COMM",
-};
-
-struct event_list {
- struct event_list *next;
- struct event_format *event;
-};
-
-#define MAX_ERR_STR_SIZE 256
-
-static void show_error(char **error_str, const char *fmt, ...)
-{
- unsigned long long index;
- const char *input;
- char *error;
- va_list ap;
- int len;
- int i;
-
- if (!error_str)
- return;
-
- input = pevent_get_input_buf();
- index = pevent_get_input_buf_ptr();
- len = input ? strlen(input) : 0;
-
- error = malloc_or_die(MAX_ERR_STR_SIZE + (len*2) + 3);
-
- if (len) {
- strcpy(error, input);
- error[len] = '\n';
- for (i = 1; i < len && i < index; i++)
- error[len+i] = ' ';
- error[len + i] = '^';
- error[len + i + 1] = '\n';
- len += i+2;
- }
-
- va_start(ap, fmt);
- vsnprintf(error + len, MAX_ERR_STR_SIZE, fmt, ap);
- va_end(ap);
-
- *error_str = error;
-}
-
-static void free_token(char *token)
-{
- pevent_free_token(token);
-}
-
-static enum event_type read_token(char **tok)
-{
- enum event_type type;
- char *token = NULL;
-
- do {
- free_token(token);
- type = pevent_read_token(&token);
- } while (type == EVENT_NEWLINE || type == EVENT_SPACE);
-
- /* If token is = or ! check to see if the next char is ~ */
- if (token &&
- (strcmp(token, "=") == 0 || strcmp(token, "!") == 0) &&
- pevent_peek_char() == '~') {
- /* append it */
- *tok = malloc_or_die(3);
- sprintf(*tok, "%c%c", *token, '~');
- free_token(token);
- /* Now remove the '~' from the buffer */
- pevent_read_token(&token);
- free_token(token);
- } else
- *tok = token;
-
- return type;
-}
-
-static int filter_cmp(const void *a, const void *b)
-{
- const struct filter_type *ea = a;
- const struct filter_type *eb = b;
-
- if (ea->event_id < eb->event_id)
- return -1;
-
- if (ea->event_id > eb->event_id)
- return 1;
-
- return 0;
-}
-
-static struct filter_type *
-find_filter_type(struct event_filter *filter, int id)
-{
- struct filter_type *filter_type;
- struct filter_type key;
-
- key.event_id = id;
-
- filter_type = bsearch(&key, filter->event_filters,
- filter->filters,
- sizeof(*filter->event_filters),
- filter_cmp);
-
- return filter_type;
-}
-
-static struct filter_type *
-add_filter_type(struct event_filter *filter, int id)
-{
- struct filter_type *filter_type;
- int i;
-
- filter_type = find_filter_type(filter, id);
- if (filter_type)
- return filter_type;
-
- filter->event_filters = realloc(filter->event_filters,
- sizeof(*filter->event_filters) *
- (filter->filters + 1));
- if (!filter->event_filters)
- die("Could not allocate filter");
-
- for (i = 0; i < filter->filters; i++) {
- if (filter->event_filters[i].event_id > id)
- break;
- }
-
- if (i < filter->filters)
- memmove(&filter->event_filters[i+1],
- &filter->event_filters[i],
- sizeof(*filter->event_filters) *
- (filter->filters - i));
-
- filter_type = &filter->event_filters[i];
- filter_type->event_id = id;
- filter_type->event = pevent_find_event(filter->pevent, id);
- filter_type->filter = NULL;
-
- filter->filters++;
-
- return filter_type;
-}
-
-/**
- * pevent_filter_alloc - create a new event filter
- * @pevent: The pevent that this filter is associated with
- */
-struct event_filter *pevent_filter_alloc(struct pevent *pevent)
-{
- struct event_filter *filter;
-
- filter = malloc_or_die(sizeof(*filter));
- memset(filter, 0, sizeof(*filter));
- filter->pevent = pevent;
- pevent_ref(pevent);
-
- return filter;
-}
-
-static struct filter_arg *allocate_arg(void)
-{
- struct filter_arg *arg;
-
- arg = malloc_or_die(sizeof(*arg));
- memset(arg, 0, sizeof(*arg));
-
- return arg;
-}
-
-static void free_arg(struct filter_arg *arg)
-{
- if (!arg)
- return;
-
- switch (arg->type) {
- case FILTER_ARG_NONE:
- case FILTER_ARG_BOOLEAN:
- break;
-
- case FILTER_ARG_NUM:
- free_arg(arg->num.left);
- free_arg(arg->num.right);
- break;
-
- case FILTER_ARG_EXP:
- free_arg(arg->exp.left);
- free_arg(arg->exp.right);
- break;
-
- case FILTER_ARG_STR:
- free(arg->str.val);
- regfree(&arg->str.reg);
- free(arg->str.buffer);
- break;
-
- case FILTER_ARG_VALUE:
- if (arg->value.type == FILTER_STRING ||
- arg->value.type == FILTER_CHAR)
- free(arg->value.str);
- break;
-
- case FILTER_ARG_OP:
- free_arg(arg->op.left);
- free_arg(arg->op.right);
- default:
- break;
- }
-
- free(arg);
-}
-
-static void add_event(struct event_list **events,
- struct event_format *event)
-{
- struct event_list *list;
-
- list = malloc_or_die(sizeof(*list));
- list->next = *events;
- *events = list;
- list->event = event;
-}
-
-static int event_match(struct event_format *event,
- regex_t *sreg, regex_t *ereg)
-{
- if (sreg) {
- return !regexec(sreg, event->system, 0, NULL, 0) &&
- !regexec(ereg, event->name, 0, NULL, 0);
- }
-
- return !regexec(ereg, event->system, 0, NULL, 0) ||
- !regexec(ereg, event->name, 0, NULL, 0);
-}
-
-static int
-find_event(struct pevent *pevent, struct event_list **events,
- char *sys_name, char *event_name)
-{
- struct event_format *event;
- regex_t ereg;
- regex_t sreg;
- int match = 0;
- char *reg;
- int ret;
- int i;
-
- if (!event_name) {
- /* if no name is given, then swap sys and name */
- event_name = sys_name;
- sys_name = NULL;
- }
-
- reg = malloc_or_die(strlen(event_name) + 3);
- sprintf(reg, "^%s$", event_name);
-
- ret = regcomp(&ereg, reg, REG_ICASE|REG_NOSUB);
- free(reg);
-
- if (ret)
- return -1;
-
- if (sys_name) {
- reg = malloc_or_die(strlen(sys_name) + 3);
- sprintf(reg, "^%s$", sys_name);
- ret = regcomp(&sreg, reg, REG_ICASE|REG_NOSUB);
- free(reg);
- if (ret) {
- regfree(&ereg);
- return -1;
- }
- }
-
- for (i = 0; i < pevent->nr_events; i++) {
- event = pevent->events[i];
- if (event_match(event, sys_name ? &sreg : NULL, &ereg)) {
- match = 1;
- add_event(events, event);
- }
- }
-
- regfree(&ereg);
- if (sys_name)
- regfree(&sreg);
-
- if (!match)
- return -1;
-
- return 0;
-}
-
-static void free_events(struct event_list *events)
-{
- struct event_list *event;
-
- while (events) {
- event = events;
- events = events->next;
- free(event);
- }
-}
-
-static struct filter_arg *
-create_arg_item(struct event_format *event, const char *token,
- enum event_type type, char **error_str)
-{
- struct format_field *field;
- struct filter_arg *arg;
-
- arg = allocate_arg();
-
- switch (type) {
-
- case EVENT_SQUOTE:
- case EVENT_DQUOTE:
- arg->type = FILTER_ARG_VALUE;
- arg->value.type =
- type == EVENT_DQUOTE ? FILTER_STRING : FILTER_CHAR;
- arg->value.str = strdup(token);
- if (!arg->value.str)
- die("malloc string");
- break;
- case EVENT_ITEM:
- /* if it is a number, then convert it */
- if (isdigit(token[0])) {
- arg->type = FILTER_ARG_VALUE;
- arg->value.type = FILTER_NUMBER;
- arg->value.val = strtoull(token, NULL, 0);
- break;
- }
- /* Consider this a field */
- field = pevent_find_any_field(event, token);
- if (!field) {
- if (strcmp(token, COMM) != 0) {
- /* not a field, Make it false */
- arg->type = FILTER_ARG_BOOLEAN;
- arg->boolean.value = FILTER_FALSE;
- break;
- }
- /* If token is 'COMM' then it is special */
- field = &comm;
- }
- arg->type = FILTER_ARG_FIELD;
- arg->field.field = field;
- break;
- default:
- free_arg(arg);
- show_error(error_str, "expected a value but found %s",
- token);
- return NULL;
- }
- return arg;
-}
-
-static struct filter_arg *
-create_arg_op(enum filter_op_type btype)
-{
- struct filter_arg *arg;
-
- arg = allocate_arg();
- arg->type = FILTER_ARG_OP;
- arg->op.type = btype;
-
- return arg;
-}
-
-static struct filter_arg *
-create_arg_exp(enum filter_exp_type etype)
-{
- struct filter_arg *arg;
-
- arg = allocate_arg();
- arg->type = FILTER_ARG_EXP;
- arg->op.type = etype;
-
- return arg;
-}
-
-static struct filter_arg *
-create_arg_cmp(enum filter_exp_type etype)
-{
- struct filter_arg *arg;
-
- arg = allocate_arg();
- /* Use NUM and change if necessary */
- arg->type = FILTER_ARG_NUM;
- arg->op.type = etype;
-
- return arg;
-}
-
-static int add_right(struct filter_arg *op, struct filter_arg *arg,
- char **error_str)
-{
- struct filter_arg *left;
- char *str;
- int op_type;
- int ret;
-
- switch (op->type) {
- case FILTER_ARG_EXP:
- if (op->exp.right)
- goto out_fail;
- op->exp.right = arg;
- break;
-
- case FILTER_ARG_OP:
- if (op->op.right)
- goto out_fail;
- op->op.right = arg;
- break;
-
- case FILTER_ARG_NUM:
- if (op->op.right)
- goto out_fail;
- /*
- * The arg must be num, str, or field
- */
- switch (arg->type) {
- case FILTER_ARG_VALUE:
- case FILTER_ARG_FIELD:
- break;
- default:
- show_error(error_str,
- "Illegal rvalue");
- return -1;
- }
-
- /*
- * Depending on the type, we may need to
- * convert this to a string or regex.
- */
- switch (arg->value.type) {
- case FILTER_CHAR:
- /*
- * A char should be converted to number if
- * the string is 1 byte, and the compare
- * is not a REGEX.
- */
- if (strlen(arg->value.str) == 1 &&
- op->num.type != FILTER_CMP_REGEX &&
- op->num.type != FILTER_CMP_NOT_REGEX) {
- arg->value.type = FILTER_NUMBER;
- goto do_int;
- }
- /* fall through */
- case FILTER_STRING:
-
- /* convert op to a string arg */
- op_type = op->num.type;
- left = op->num.left;
- str = arg->value.str;
-
- /* reset the op for the new field */
- memset(op, 0, sizeof(*op));
-
- /*
- * If left arg was a field not found then
- * NULL the entire op.
- */
- if (left->type == FILTER_ARG_BOOLEAN) {
- free_arg(left);
- free_arg(arg);
- op->type = FILTER_ARG_BOOLEAN;
- op->boolean.value = FILTER_FALSE;
- break;
- }
-
- /* Left arg must be a field */
- if (left->type != FILTER_ARG_FIELD) {
- show_error(error_str,
- "Illegal lvalue for string comparison");
- return -1;
- }
-
- /* Make sure this is a valid string compare */
- switch (op_type) {
- case FILTER_CMP_EQ:
- op_type = FILTER_CMP_MATCH;
- break;
- case FILTER_CMP_NE:
- op_type = FILTER_CMP_NOT_MATCH;
- break;
-
- case FILTER_CMP_REGEX:
- case FILTER_CMP_NOT_REGEX:
- ret = regcomp(&op->str.reg, str, REG_ICASE|REG_NOSUB);
- if (ret) {
- show_error(error_str,
- "RegEx '%s' did not compute",
- str);
- return -1;
- }
- break;
- default:
- show_error(error_str,
- "Illegal comparison for string");
- return -1;
- }
-
- op->type = FILTER_ARG_STR;
- op->str.type = op_type;
- op->str.field = left->field.field;
- op->str.val = strdup(str);
- if (!op->str.val)
- die("malloc string");
- /*
- * Need a buffer to copy data for tests
- */
- op->str.buffer = malloc_or_die(op->str.field->size + 1);
- /* Null terminate this buffer */
- op->str.buffer[op->str.field->size] = 0;
-
- /* We no longer have left or right args */
- free_arg(arg);
- free_arg(left);
-
- break;
-
- case FILTER_NUMBER:
-
- do_int:
- switch (op->num.type) {
- case FILTER_CMP_REGEX:
- case FILTER_CMP_NOT_REGEX:
- show_error(error_str,
- "Op not allowed with integers");
- return -1;
-
- default:
- break;
- }
-
- /* numeric compare */
- op->num.right = arg;
- break;
- default:
- goto out_fail;
- }
- break;
- default:
- goto out_fail;
- }
-
- return 0;
-
- out_fail:
- show_error(error_str,
- "Syntax error");
- return -1;
-}
-
-static struct filter_arg *
-rotate_op_right(struct filter_arg *a, struct filter_arg *b)
-{
- struct filter_arg *arg;
-
- arg = a->op.right;
- a->op.right = b;
- return arg;
-}
-
-static int add_left(struct filter_arg *op, struct filter_arg *arg)
-{
- switch (op->type) {
- case FILTER_ARG_EXP:
- if (arg->type == FILTER_ARG_OP)
- arg = rotate_op_right(arg, op);
- op->exp.left = arg;
- break;
-
- case FILTER_ARG_OP:
- op->op.left = arg;
- break;
- case FILTER_ARG_NUM:
- if (arg->type == FILTER_ARG_OP)
- arg = rotate_op_right(arg, op);
-
- /* left arg of compares must be a field */
- if (arg->type != FILTER_ARG_FIELD &&
- arg->type != FILTER_ARG_BOOLEAN)
- return -1;
- op->num.left = arg;
- break;
- default:
- return -1;
- }
- return 0;
-}
-
-enum op_type {
- OP_NONE,
- OP_BOOL,
- OP_NOT,
- OP_EXP,
- OP_CMP,
-};
-
-static enum op_type process_op(const char *token,
- enum filter_op_type *btype,
- enum filter_cmp_type *ctype,
- enum filter_exp_type *etype)
-{
- *btype = FILTER_OP_NOT;
- *etype = FILTER_EXP_NONE;
- *ctype = FILTER_CMP_NONE;
-
- if (strcmp(token, "&&") == 0)
- *btype = FILTER_OP_AND;
- else if (strcmp(token, "||") == 0)
- *btype = FILTER_OP_OR;
- else if (strcmp(token, "!") == 0)
- return OP_NOT;
-
- if (*btype != FILTER_OP_NOT)
- return OP_BOOL;
-
- /* Check for value expressions */
- if (strcmp(token, "+") == 0) {
- *etype = FILTER_EXP_ADD;
- } else if (strcmp(token, "-") == 0) {
- *etype = FILTER_EXP_SUB;
- } else if (strcmp(token, "*") == 0) {
- *etype = FILTER_EXP_MUL;
- } else if (strcmp(token, "/") == 0) {
- *etype = FILTER_EXP_DIV;
- } else if (strcmp(token, "%") == 0) {
- *etype = FILTER_EXP_MOD;
- } else if (strcmp(token, ">>") == 0) {
- *etype = FILTER_EXP_RSHIFT;
- } else if (strcmp(token, "<<") == 0) {
- *etype = FILTER_EXP_LSHIFT;
- } else if (strcmp(token, "&") == 0) {
- *etype = FILTER_EXP_AND;
- } else if (strcmp(token, "|") == 0) {
- *etype = FILTER_EXP_OR;
- } else if (strcmp(token, "^") == 0) {
- *etype = FILTER_EXP_XOR;
- } else if (strcmp(token, "~") == 0)
- *etype = FILTER_EXP_NOT;
-
- if (*etype != FILTER_EXP_NONE)
- return OP_EXP;
-
- /* Check for compares */
- if (strcmp(token, "==") == 0)
- *ctype = FILTER_CMP_EQ;
- else if (strcmp(token, "!=") == 0)
- *ctype = FILTER_CMP_NE;
- else if (strcmp(token, "<") == 0)
- *ctype = FILTER_CMP_LT;
- else if (strcmp(token, ">") == 0)
- *ctype = FILTER_CMP_GT;
- else if (strcmp(token, "<=") == 0)
- *ctype = FILTER_CMP_LE;
- else if (strcmp(token, ">=") == 0)
- *ctype = FILTER_CMP_GE;
- else if (strcmp(token, "=~") == 0)
- *ctype = FILTER_CMP_REGEX;
- else if (strcmp(token, "!~") == 0)
- *ctype = FILTER_CMP_NOT_REGEX;
- else
- return OP_NONE;
-
- return OP_CMP;
-}
-
-static int check_op_done(struct filter_arg *arg)
-{
- switch (arg->type) {
- case FILTER_ARG_EXP:
- return arg->exp.right != NULL;
-
- case FILTER_ARG_OP:
- return arg->op.right != NULL;
-
- case FILTER_ARG_NUM:
- return arg->num.right != NULL;
-
- case FILTER_ARG_STR:
- /* A string conversion is always done */
- return 1;
-
- case FILTER_ARG_BOOLEAN:
- /* field not found, is ok */
- return 1;
-
- default:
- return 0;
- }
-}
-
-enum filter_vals {
- FILTER_VAL_NORM,
- FILTER_VAL_FALSE,
- FILTER_VAL_TRUE,
-};
-
-static void reparent_op_arg(struct filter_arg *parent, struct filter_arg *old_child,
- struct filter_arg *arg)
-{
- struct filter_arg *other_child = NULL;
- struct filter_arg **ptr = NULL;
-
- if (parent->type != FILTER_ARG_OP &&
- arg->type != FILTER_ARG_OP)
- die("can not reparent other than OP");
-
- /* Get the sibling */
- if (old_child->op.right == arg) {
- ptr = &old_child->op.right;
- other_child = old_child->op.left;
- } else if (old_child->op.left == arg) {
- ptr = &old_child->op.left;
- other_child = old_child->op.right;
- } else
- die("Error in reparent op, find other child");
-
- /* Detach arg from old_child */
- *ptr = NULL;
-
- /* Check for root */
- if (parent == old_child) {
- free_arg(other_child);
- *parent = *arg;
- /* Free arg without recussion */
- free(arg);
- return;
- }
-
- if (parent->op.right == old_child)
- ptr = &parent->op.right;
- else if (parent->op.left == old_child)
- ptr = &parent->op.left;
- else
- die("Error in reparent op");
- *ptr = arg;
-
- free_arg(old_child);
-}
-
-static enum filter_vals test_arg(struct filter_arg *parent, struct filter_arg *arg)
-{
- enum filter_vals lval, rval;
-
- switch (arg->type) {
-
- /* bad case */
- case FILTER_ARG_BOOLEAN:
- return FILTER_VAL_FALSE + arg->boolean.value;
-
- /* good cases: */
- case FILTER_ARG_STR:
- case FILTER_ARG_VALUE:
- case FILTER_ARG_FIELD:
- return FILTER_VAL_NORM;
-
- case FILTER_ARG_EXP:
- lval = test_arg(arg, arg->exp.left);
- if (lval != FILTER_VAL_NORM)
- return lval;
- rval = test_arg(arg, arg->exp.right);
- if (rval != FILTER_VAL_NORM)
- return rval;
- return FILTER_VAL_NORM;
-
- case FILTER_ARG_NUM:
- lval = test_arg(arg, arg->num.left);
- if (lval != FILTER_VAL_NORM)
- return lval;
- rval = test_arg(arg, arg->num.right);
- if (rval != FILTER_VAL_NORM)
- return rval;
- return FILTER_VAL_NORM;
-
- case FILTER_ARG_OP:
- if (arg->op.type != FILTER_OP_NOT) {
- lval = test_arg(arg, arg->op.left);
- switch (lval) {
- case FILTER_VAL_NORM:
- break;
- case FILTER_VAL_TRUE:
- if (arg->op.type == FILTER_OP_OR)
- return FILTER_VAL_TRUE;
- rval = test_arg(arg, arg->op.right);
- if (rval != FILTER_VAL_NORM)
- return rval;
-
- reparent_op_arg(parent, arg, arg->op.right);
- return FILTER_VAL_NORM;
-
- case FILTER_VAL_FALSE:
- if (arg->op.type == FILTER_OP_AND)
- return FILTER_VAL_FALSE;
- rval = test_arg(arg, arg->op.right);
- if (rval != FILTER_VAL_NORM)
- return rval;
-
- reparent_op_arg(parent, arg, arg->op.right);
- return FILTER_VAL_NORM;
- }
- }
-
- rval = test_arg(arg, arg->op.right);
- switch (rval) {
- case FILTER_VAL_NORM:
- break;
- case FILTER_VAL_TRUE:
- if (arg->op.type == FILTER_OP_OR)
- return FILTER_VAL_TRUE;
- if (arg->op.type == FILTER_OP_NOT)
- return FILTER_VAL_FALSE;
-
- reparent_op_arg(parent, arg, arg->op.left);
- return FILTER_VAL_NORM;
-
- case FILTER_VAL_FALSE:
- if (arg->op.type == FILTER_OP_AND)
- return FILTER_VAL_FALSE;
- if (arg->op.type == FILTER_OP_NOT)
- return FILTER_VAL_TRUE;
-
- reparent_op_arg(parent, arg, arg->op.left);
- return FILTER_VAL_NORM;
- }
-
- return FILTER_VAL_NORM;
- default:
- die("bad arg in filter tree");
- }
- return FILTER_VAL_NORM;
-}
-
-/* Remove any unknown event fields */
-static struct filter_arg *collapse_tree(struct filter_arg *arg)
-{
- enum filter_vals ret;
-
- ret = test_arg(arg, arg);
- switch (ret) {
- case FILTER_VAL_NORM:
- return arg;
-
- case FILTER_VAL_TRUE:
- case FILTER_VAL_FALSE:
- free_arg(arg);
- arg = allocate_arg();
- arg->type = FILTER_ARG_BOOLEAN;
- arg->boolean.value = ret == FILTER_VAL_TRUE;
- }
-
- return arg;
-}
-
-static int
-process_filter(struct event_format *event, struct filter_arg **parg,
- char **error_str, int not)
-{
- enum event_type type;
- char *token = NULL;
- struct filter_arg *current_op = NULL;
- struct filter_arg *current_exp = NULL;
- struct filter_arg *left_item = NULL;
- struct filter_arg *arg = NULL;
- enum op_type op_type;
- enum filter_op_type btype;
- enum filter_exp_type etype;
- enum filter_cmp_type ctype;
- int ret;
-
- *parg = NULL;
-
- do {
- free(token);
- type = read_token(&token);
- switch (type) {
- case EVENT_SQUOTE:
- case EVENT_DQUOTE:
- case EVENT_ITEM:
- arg = create_arg_item(event, token, type, error_str);
- if (!arg)
- goto fail;
- if (!left_item)
- left_item = arg;
- else if (current_exp) {
- ret = add_right(current_exp, arg, error_str);
- if (ret < 0)
- goto fail;
- left_item = NULL;
- /* Not's only one one expression */
- if (not) {
- arg = NULL;
- if (current_op)
- goto fail_print;
- free(token);
- *parg = current_exp;
- return 0;
- }
- } else
- goto fail_print;
- arg = NULL;
- break;
-
- case EVENT_DELIM:
- if (*token == ',') {
- show_error(error_str,
- "Illegal token ','");
- goto fail;
- }
-
- if (*token == '(') {
- if (left_item) {
- show_error(error_str,
- "Open paren can not come after item");
- goto fail;
- }
- if (current_exp) {
- show_error(error_str,
- "Open paren can not come after expression");
- goto fail;
- }
-
- ret = process_filter(event, &arg, error_str, 0);
- if (ret != 1) {
- if (ret == 0)
- show_error(error_str,
- "Unbalanced number of '('");
- goto fail;
- }
- ret = 0;
-
- /* A not wants just one expression */
- if (not) {
- if (current_op)
- goto fail_print;
- *parg = arg;
- return 0;
- }
-
- if (current_op)
- ret = add_right(current_op, arg, error_str);
- else
- current_exp = arg;
-
- if (ret < 0)
- goto fail;
-
- } else { /* ')' */
- if (!current_op && !current_exp)
- goto fail_print;
-
- /* Make sure everything is finished at this level */
- if (current_exp && !check_op_done(current_exp))
- goto fail_print;
- if (current_op && !check_op_done(current_op))
- goto fail_print;
-
- if (current_op)
- *parg = current_op;
- else
- *parg = current_exp;
- return 1;
- }
- break;
-
- case EVENT_OP:
- op_type = process_op(token, &btype, &ctype, &etype);
-
- /* All expect a left arg except for NOT */
- switch (op_type) {
- case OP_BOOL:
- /* Logic ops need a left expression */
- if (!current_exp && !current_op)
- goto fail_print;
- /* fall through */
- case OP_NOT:
- /* logic only processes ops and exp */
- if (left_item)
- goto fail_print;
- break;
- case OP_EXP:
- case OP_CMP:
- if (!left_item)
- goto fail_print;
- break;
- case OP_NONE:
- show_error(error_str,
- "Unknown op token %s", token);
- goto fail;
- }
-
- ret = 0;
- switch (op_type) {
- case OP_BOOL:
- arg = create_arg_op(btype);
- if (current_op)
- ret = add_left(arg, current_op);
- else
- ret = add_left(arg, current_exp);
- current_op = arg;
- current_exp = NULL;
- break;
-
- case OP_NOT:
- arg = create_arg_op(btype);
- if (current_op)
- ret = add_right(current_op, arg, error_str);
- if (ret < 0)
- goto fail;
- current_exp = arg;
- ret = process_filter(event, &arg, error_str, 1);
- if (ret < 0)
- goto fail;
- ret = add_right(current_exp, arg, error_str);
- if (ret < 0)
- goto fail;
- break;
-
- case OP_EXP:
- case OP_CMP:
- if (op_type == OP_EXP)
- arg = create_arg_exp(etype);
- else
- arg = create_arg_cmp(ctype);
-
- if (current_op)
- ret = add_right(current_op, arg, error_str);
- if (ret < 0)
- goto fail;
- ret = add_left(arg, left_item);
- if (ret < 0) {
- arg = NULL;
- goto fail_print;
- }
- current_exp = arg;
- break;
- default:
- break;
- }
- arg = NULL;
- if (ret < 0)
- goto fail_print;
- break;
- case EVENT_NONE:
- break;
- default:
- goto fail_print;
- }
- } while (type != EVENT_NONE);
-
- if (!current_op && !current_exp)
- goto fail_print;
-
- if (!current_op)
- current_op = current_exp;
-
- current_op = collapse_tree(current_op);
-
- *parg = current_op;
-
- return 0;
-
- fail_print:
- show_error(error_str, "Syntax error");
- fail:
- free_arg(current_op);
- free_arg(current_exp);
- free_arg(arg);
- free(token);
- return -1;
-}
-
-static int
-process_event(struct event_format *event, const char *filter_str,
- struct filter_arg **parg, char **error_str)
-{
- int ret;
-
- pevent_buffer_init(filter_str, strlen(filter_str));
-
- ret = process_filter(event, parg, error_str, 0);
- if (ret == 1) {
- show_error(error_str,
- "Unbalanced number of ')'");
- return -1;
- }
- if (ret < 0)
- return ret;
-
- /* If parg is NULL, then make it into FALSE */
- if (!*parg) {
- *parg = allocate_arg();
- (*parg)->type = FILTER_ARG_BOOLEAN;
- (*parg)->boolean.value = FILTER_FALSE;
- }
-
- return 0;
-}
-
-static int filter_event(struct event_filter *filter,
- struct event_format *event,
- const char *filter_str, char **error_str)
-{
- struct filter_type *filter_type;
- struct filter_arg *arg;
- int ret;
-
- if (filter_str) {
- ret = process_event(event, filter_str, &arg, error_str);
- if (ret < 0)
- return ret;
-
- } else {
- /* just add a TRUE arg */
- arg = allocate_arg();
- arg->type = FILTER_ARG_BOOLEAN;
- arg->boolean.value = FILTER_TRUE;
- }
-
- filter_type = add_filter_type(filter, event->id);
- if (filter_type->filter)
- free_arg(filter_type->filter);
- filter_type->filter = arg;
-
- return 0;
-}
-
-/**
- * pevent_filter_add_filter_str - add a new filter
- * @filter: the event filter to add to
- * @filter_str: the filter string that contains the filter
- * @error_str: string containing reason for failed filter
- *
- * Returns 0 if the filter was successfully added
- * -1 if there was an error.
- *
- * On error, if @error_str points to a string pointer,
- * it is set to the reason that the filter failed.
- * This string must be freed with "free".
- */
-int pevent_filter_add_filter_str(struct event_filter *filter,
- const char *filter_str,
- char **error_str)
-{
- struct pevent *pevent = filter->pevent;
- struct event_list *event;
- struct event_list *events = NULL;
- const char *filter_start;
- const char *next_event;
- char *this_event;
- char *event_name = NULL;
- char *sys_name = NULL;
- char *sp;
- int rtn = 0;
- int len;
- int ret;
-
- /* clear buffer to reset show error */
- pevent_buffer_init("", 0);
-
- if (error_str)
- *error_str = NULL;
-
- filter_start = strchr(filter_str, ':');
- if (filter_start)
- len = filter_start - filter_str;
- else
- len = strlen(filter_str);
-
-
- do {
- next_event = strchr(filter_str, ',');
- if (next_event &&
- (!filter_start || next_event < filter_start))
- len = next_event - filter_str;
- else if (filter_start)
- len = filter_start - filter_str;
- else
- len = strlen(filter_str);
-
- this_event = malloc_or_die(len + 1);
- memcpy(this_event, filter_str, len);
- this_event[len] = 0;
-
- if (next_event)
- next_event++;
-
- filter_str = next_event;
-
- sys_name = strtok_r(this_event, "/", &sp);
- event_name = strtok_r(NULL, "/", &sp);
-
- if (!sys_name) {
- show_error(error_str, "No filter found");
- /* This can only happen when events is NULL, but still */
- free_events(events);
- free(this_event);
- return -1;
- }
-
- /* Find this event */
- ret = find_event(pevent, &events, strim(sys_name), strim(event_name));
- if (ret < 0) {
- if (event_name)
- show_error(error_str,
- "No event found under '%s.%s'",
- sys_name, event_name);
- else
- show_error(error_str,
- "No event found under '%s'",
- sys_name);
- free_events(events);
- free(this_event);
- return -1;
- }
- free(this_event);
- } while (filter_str);
-
- /* Skip the ':' */
- if (filter_start)
- filter_start++;
-
- /* filter starts here */
- for (event = events; event; event = event->next) {
- ret = filter_event(filter, event->event, filter_start,
- error_str);
- /* Failures are returned if a parse error happened */
- if (ret < 0)
- rtn = ret;
-
- if (ret >= 0 && pevent->test_filters) {
- char *test;
- test = pevent_filter_make_string(filter, event->event->id);
- printf(" '%s: %s'\n", event->event->name, test);
- free(test);
- }
- }
-
- free_events(events);
-
- if (rtn >= 0 && pevent->test_filters)
- exit(0);
-
- return rtn;
-}
-
-static void free_filter_type(struct filter_type *filter_type)
-{
- free_arg(filter_type->filter);
-}
-
-/**
- * pevent_filter_remove_event - remove a filter for an event
- * @filter: the event filter to remove from
- * @event_id: the event to remove a filter for
- *
- * Removes the filter saved for an event defined by @event_id
- * from the @filter.
- *
- * Returns 1: if an event was removed
- * 0: if the event was not found
- */
-int pevent_filter_remove_event(struct event_filter *filter,
- int event_id)
-{
- struct filter_type *filter_type;
- unsigned long len;
-
- if (!filter->filters)
- return 0;
-
- filter_type = find_filter_type(filter, event_id);
-
- if (!filter_type)
- return 0;
-
- free_filter_type(filter_type);
-
- /* The filter_type points into the event_filters array */
- len = (unsigned long)(filter->event_filters + filter->filters) -
- (unsigned long)(filter_type + 1);
-
- memmove(filter_type, filter_type + 1, len);
- filter->filters--;
-
- memset(&filter->event_filters[filter->filters], 0,
- sizeof(*filter_type));
-
- return 1;
-}
-
-/**
- * pevent_filter_reset - clear all filters in a filter
- * @filter: the event filter to reset
- *
- * Removes all filters from a filter and resets it.
- */
-void pevent_filter_reset(struct event_filter *filter)
-{
- int i;
-
- for (i = 0; i < filter->filters; i++)
- free_filter_type(&filter->event_filters[i]);
-
- free(filter->event_filters);
- filter->filters = 0;
- filter->event_filters = NULL;
-}
-
-void pevent_filter_free(struct event_filter *filter)
-{
- pevent_unref(filter->pevent);
-
- pevent_filter_reset(filter);
-
- free(filter);
-}
-
-static char *arg_to_str(struct event_filter *filter, struct filter_arg *arg);
-
-static int copy_filter_type(struct event_filter *filter,
- struct event_filter *source,
- struct filter_type *filter_type)
-{
- struct filter_arg *arg;
- struct event_format *event;
- const char *sys;
- const char *name;
- char *str;
-
- /* Can't assume that the pevent's are the same */
- sys = filter_type->event->system;
- name = filter_type->event->name;
- event = pevent_find_event_by_name(filter->pevent, sys, name);
- if (!event)
- return -1;
-
- str = arg_to_str(source, filter_type->filter);
- if (!str)
- return -1;
-
- if (strcmp(str, "TRUE") == 0 || strcmp(str, "FALSE") == 0) {
- /* Add trivial event */
- arg = allocate_arg();
- arg->type = FILTER_ARG_BOOLEAN;
- if (strcmp(str, "TRUE") == 0)
- arg->boolean.value = 1;
- else
- arg->boolean.value = 0;
-
- filter_type = add_filter_type(filter, event->id);
- filter_type->filter = arg;
-
- free(str);
- return 0;
- }
-
- filter_event(filter, event, str, NULL);
- free(str);
-
- return 0;
-}
-
-/**
- * pevent_filter_copy - copy a filter using another filter
- * @dest - the filter to copy to
- * @source - the filter to copy from
- *
- * Returns 0 on success and -1 if not all filters were copied
- */
-int pevent_filter_copy(struct event_filter *dest, struct event_filter *source)
-{
- int ret = 0;
- int i;
-
- pevent_filter_reset(dest);
-
- for (i = 0; i < source->filters; i++) {
- if (copy_filter_type(dest, source, &source->event_filters[i]))
- ret = -1;
- }
- return ret;
-}
-
-
-/**
- * pevent_update_trivial - update the trivial filters with the given filter
- * @dest - the filter to update
- * @source - the filter as the source of the update
- * @type - the type of trivial filter to update.
- *
- * Scan dest for trivial events matching @type to replace with the source.
- *
- * Returns 0 on success and -1 if there was a problem updating, but
- * events may have still been updated on error.
- */
-int pevent_update_trivial(struct event_filter *dest, struct event_filter *source,
- enum filter_trivial_type type)
-{
- struct pevent *src_pevent;
- struct pevent *dest_pevent;
- struct event_format *event;
- struct filter_type *filter_type;
- struct filter_arg *arg;
- char *str;
- int i;
-
- src_pevent = source->pevent;
- dest_pevent = dest->pevent;
-
- /* Do nothing if either of the filters has nothing to filter */
- if (!dest->filters || !source->filters)
- return 0;
-
- for (i = 0; i < dest->filters; i++) {
- filter_type = &dest->event_filters[i];
- arg = filter_type->filter;
- if (arg->type != FILTER_ARG_BOOLEAN)
- continue;
- if ((arg->boolean.value && type == FILTER_TRIVIAL_FALSE) ||
- (!arg->boolean.value && type == FILTER_TRIVIAL_TRUE))
- continue;
-
- event = filter_type->event;
-
- if (src_pevent != dest_pevent) {
- /* do a look up */
- event = pevent_find_event_by_name(src_pevent,
- event->system,
- event->name);
- if (!event)
- return -1;
- }
-
- str = pevent_filter_make_string(source, event->id);
- if (!str)
- continue;
-
- /* Don't bother if the filter is trivial too */
- if (strcmp(str, "TRUE") != 0 && strcmp(str, "FALSE") != 0)
- filter_event(dest, event, str, NULL);
- free(str);
- }
- return 0;
-}
-
-/**
- * pevent_filter_clear_trivial - clear TRUE and FALSE filters
- * @filter: the filter to remove trivial filters from
- * @type: remove only true, false, or both
- *
- * Removes filters that only contain a TRUE or FALES boolean arg.
- */
-void pevent_filter_clear_trivial(struct event_filter *filter,
- enum filter_trivial_type type)
-{
- struct filter_type *filter_type;
- int count = 0;
- int *ids = NULL;
- int i;
-
- if (!filter->filters)
- return;
-
- /*
- * Two steps, first get all ids with trivial filters.
- * then remove those ids.
- */
- for (i = 0; i < filter->filters; i++) {
- filter_type = &filter->event_filters[i];
- if (filter_type->filter->type != FILTER_ARG_BOOLEAN)
- continue;
- switch (type) {
- case FILTER_TRIVIAL_FALSE:
- if (filter_type->filter->boolean.value)
- continue;
- case FILTER_TRIVIAL_TRUE:
- if (!filter_type->filter->boolean.value)
- continue;
- default:
- break;
- }
-
- ids = realloc(ids, sizeof(*ids) * (count + 1));
- if (!ids)
- die("Can't allocate ids");
- ids[count++] = filter_type->event_id;
- }
-
- if (!count)
- return;
-
- for (i = 0; i < count; i++)
- pevent_filter_remove_event(filter, ids[i]);
-
- free(ids);
-}
-
-/**
- * pevent_filter_event_has_trivial - return true event contains trivial filter
- * @filter: the filter with the information
- * @event_id: the id of the event to test
- * @type: trivial type to test for (TRUE, FALSE, EITHER)
- *
- * Returns 1 if the event contains a matching trivial type
- * otherwise 0.
- */
-int pevent_filter_event_has_trivial(struct event_filter *filter,
- int event_id,
- enum filter_trivial_type type)
-{
- struct filter_type *filter_type;
-
- if (!filter->filters)
- return 0;
-
- filter_type = find_filter_type(filter, event_id);
-
- if (!filter_type)
- return 0;
-
- if (filter_type->filter->type != FILTER_ARG_BOOLEAN)
- return 0;
-
- switch (type) {
- case FILTER_TRIVIAL_FALSE:
- return !filter_type->filter->boolean.value;
-
- case FILTER_TRIVIAL_TRUE:
- return filter_type->filter->boolean.value;
- default:
- return 1;
- }
-}
-
-static int test_filter(struct event_format *event,
- struct filter_arg *arg, struct pevent_record *record);
-
-static const char *
-get_comm(struct event_format *event, struct pevent_record *record)
-{
- const char *comm;
- int pid;
-
- pid = pevent_data_pid(event->pevent, record);
- comm = pevent_data_comm_from_pid(event->pevent, pid);
- return comm;
-}
-
-static unsigned long long
-get_value(struct event_format *event,
- struct format_field *field, struct pevent_record *record)
-{
- unsigned long long val;
-
- /* Handle our dummy "comm" field */
- if (field == &comm) {
- const char *name;
-
- name = get_comm(event, record);
- return (unsigned long)name;
- }
-
- pevent_read_number_field(field, record->data, &val);
-
- if (!(field->flags & FIELD_IS_SIGNED))
- return val;
-
- switch (field->size) {
- case 1:
- return (char)val;
- case 2:
- return (short)val;
- case 4:
- return (int)val;
- case 8:
- return (long long)val;
- }
- return val;
-}
-
-static unsigned long long
-get_arg_value(struct event_format *event, struct filter_arg *arg, struct pevent_record *record);
-
-static unsigned long long
-get_exp_value(struct event_format *event, struct filter_arg *arg, struct pevent_record *record)
-{
- unsigned long long lval, rval;
-
- lval = get_arg_value(event, arg->exp.left, record);
- rval = get_arg_value(event, arg->exp.right, record);
-
- switch (arg->exp.type) {
- case FILTER_EXP_ADD:
- return lval + rval;
-
- case FILTER_EXP_SUB:
- return lval - rval;
-
- case FILTER_EXP_MUL:
- return lval * rval;
-
- case FILTER_EXP_DIV:
- return lval / rval;
-
- case FILTER_EXP_MOD:
- return lval % rval;
-
- case FILTER_EXP_RSHIFT:
- return lval >> rval;
-
- case FILTER_EXP_LSHIFT:
- return lval << rval;
-
- case FILTER_EXP_AND:
- return lval & rval;
-
- case FILTER_EXP_OR:
- return lval | rval;
-
- case FILTER_EXP_XOR:
- return lval ^ rval;
-
- case FILTER_EXP_NOT:
- default:
- die("error in exp");
- }
- return 0;
-}
-
-static unsigned long long
-get_arg_value(struct event_format *event, struct filter_arg *arg, struct pevent_record *record)
-{
- switch (arg->type) {
- case FILTER_ARG_FIELD:
- return get_value(event, arg->field.field, record);
-
- case FILTER_ARG_VALUE:
- if (arg->value.type != FILTER_NUMBER)
- die("must have number field!");
- return arg->value.val;
-
- case FILTER_ARG_EXP:
- return get_exp_value(event, arg, record);
-
- default:
- die("oops in filter");
- }
- return 0;
-}
-
-static int test_num(struct event_format *event,
- struct filter_arg *arg, struct pevent_record *record)
-{
- unsigned long long lval, rval;
-
- lval = get_arg_value(event, arg->num.left, record);
- rval = get_arg_value(event, arg->num.right, record);
-
- switch (arg->num.type) {
- case FILTER_CMP_EQ:
- return lval == rval;
-
- case FILTER_CMP_NE:
- return lval != rval;
-
- case FILTER_CMP_GT:
- return lval > rval;
-
- case FILTER_CMP_LT:
- return lval < rval;
-
- case FILTER_CMP_GE:
- return lval >= rval;
-
- case FILTER_CMP_LE:
- return lval <= rval;
-
- default:
- /* ?? */
- return 0;
- }
-}
-
-static const char *get_field_str(struct filter_arg *arg, struct pevent_record *record)
-{
- struct event_format *event;
- struct pevent *pevent;
- unsigned long long addr;
- const char *val = NULL;
- unsigned int size;
- char hex[64];
-
- /* If the field is not a string convert it */
- if (arg->str.field->flags & FIELD_IS_STRING) {
- val = record->data + arg->str.field->offset;
- size = arg->str.field->size;
-
- if (arg->str.field->flags & FIELD_IS_DYNAMIC) {
- addr = *(unsigned int *)val;
- val = record->data + (addr & 0xffff);
- size = addr >> 16;
- }
-
- /*
- * We need to copy the data since we can't be sure the field
- * is null terminated.
- */
- if (*(val + size - 1)) {
- /* copy it */
- memcpy(arg->str.buffer, val, arg->str.field->size);
- /* the buffer is already NULL terminated */
- val = arg->str.buffer;
- }
-
- } else {
- event = arg->str.field->event;
- pevent = event->pevent;
- addr = get_value(event, arg->str.field, record);
-
- if (arg->str.field->flags & (FIELD_IS_POINTER | FIELD_IS_LONG))
- /* convert to a kernel symbol */
- val = pevent_find_function(pevent, addr);
-
- if (val == NULL) {
- /* just use the hex of the string name */
- snprintf(hex, 64, "0x%llx", addr);
- val = hex;
- }
- }
-
- return val;
-}
-
-static int test_str(struct event_format *event,
- struct filter_arg *arg, struct pevent_record *record)
-{
- const char *val;
-
- if (arg->str.field == &comm)
- val = get_comm(event, record);
- else
- val = get_field_str(arg, record);
-
- switch (arg->str.type) {
- case FILTER_CMP_MATCH:
- return strcmp(val, arg->str.val) == 0;
-
- case FILTER_CMP_NOT_MATCH:
- return strcmp(val, arg->str.val) != 0;
-
- case FILTER_CMP_REGEX:
- /* Returns zero on match */
- return !regexec(&arg->str.reg, val, 0, NULL, 0);
-
- case FILTER_CMP_NOT_REGEX:
- return regexec(&arg->str.reg, val, 0, NULL, 0);
-
- default:
- /* ?? */
- return 0;
- }
-}
-
-static int test_op(struct event_format *event,
- struct filter_arg *arg, struct pevent_record *record)
-{
- switch (arg->op.type) {
- case FILTER_OP_AND:
- return test_filter(event, arg->op.left, record) &&
- test_filter(event, arg->op.right, record);
-
- case FILTER_OP_OR:
- return test_filter(event, arg->op.left, record) ||
- test_filter(event, arg->op.right, record);
-
- case FILTER_OP_NOT:
- return !test_filter(event, arg->op.right, record);
-
- default:
- /* ?? */
- return 0;
- }
-}
-
-static int test_filter(struct event_format *event,
- struct filter_arg *arg, struct pevent_record *record)
-{
- switch (arg->type) {
- case FILTER_ARG_BOOLEAN:
- /* easy case */
- return arg->boolean.value;
-
- case FILTER_ARG_OP:
- return test_op(event, arg, record);
-
- case FILTER_ARG_NUM:
- return test_num(event, arg, record);
-
- case FILTER_ARG_STR:
- return test_str(event, arg, record);
-
- case FILTER_ARG_EXP:
- case FILTER_ARG_VALUE:
- case FILTER_ARG_FIELD:
- /*
- * Expressions, fields and values evaluate
- * to true if they return non zero
- */
- return !!get_arg_value(event, arg, record);
-
- default:
- die("oops!");
- /* ?? */
- return 0;
- }
-}
-
-/**
- * pevent_event_filtered - return true if event has filter
- * @filter: filter struct with filter information
- * @event_id: event id to test if filter exists
- *
- * Returns 1 if filter found for @event_id
- * otherwise 0;
- */
-int pevent_event_filtered(struct event_filter *filter,
- int event_id)
-{
- struct filter_type *filter_type;
-
- if (!filter->filters)
- return 0;
-
- filter_type = find_filter_type(filter, event_id);
-
- return filter_type ? 1 : 0;
-}
-
-/**
- * pevent_filter_match - test if a record matches a filter
- * @filter: filter struct with filter information
- * @record: the record to test against the filter
- *
- * Returns:
- * 1 - filter found for event and @record matches
- * 0 - filter found for event and @record does not match
- * -1 - no filter found for @record's event
- * -2 - if no filters exist
- */
-int pevent_filter_match(struct event_filter *filter,
- struct pevent_record *record)
-{
- struct pevent *pevent = filter->pevent;
- struct filter_type *filter_type;
- int event_id;
-
- if (!filter->filters)
- return FILTER_NONE;
-
- event_id = pevent_data_type(pevent, record);
-
- filter_type = find_filter_type(filter, event_id);
-
- if (!filter_type)
- return FILTER_NOEXIST;
-
- return test_filter(filter_type->event, filter_type->filter, record) ?
- FILTER_MATCH : FILTER_MISS;
-}
-
-static char *op_to_str(struct event_filter *filter, struct filter_arg *arg)
-{
- char *str = NULL;
- char *left = NULL;
- char *right = NULL;
- char *op = NULL;
- int left_val = -1;
- int right_val = -1;
- int val;
- int len;
-
- switch (arg->op.type) {
- case FILTER_OP_AND:
- op = "&&";
- /* fall through */
- case FILTER_OP_OR:
- if (!op)
- op = "||";
-
- left = arg_to_str(filter, arg->op.left);
- right = arg_to_str(filter, arg->op.right);
- if (!left || !right)
- break;
-
- /* Try to consolidate boolean values */
- if (strcmp(left, "TRUE") == 0)
- left_val = 1;
- else if (strcmp(left, "FALSE") == 0)
- left_val = 0;
-
- if (strcmp(right, "TRUE") == 0)
- right_val = 1;
- else if (strcmp(right, "FALSE") == 0)
- right_val = 0;
-
- if (left_val >= 0) {
- if ((arg->op.type == FILTER_OP_AND && !left_val) ||
- (arg->op.type == FILTER_OP_OR && left_val)) {
- /* Just return left value */
- str = left;
- left = NULL;
- break;
- }
- if (right_val >= 0) {
- /* just evaluate this. */
- val = 0;
- switch (arg->op.type) {
- case FILTER_OP_AND:
- val = left_val && right_val;
- break;
- case FILTER_OP_OR:
- val = left_val || right_val;
- break;
- default:
- break;
- }
- str = malloc_or_die(6);
- if (val)
- strcpy(str, "TRUE");
- else
- strcpy(str, "FALSE");
- break;
- }
- }
- if (right_val >= 0) {
- if ((arg->op.type == FILTER_OP_AND && !right_val) ||
- (arg->op.type == FILTER_OP_OR && right_val)) {
- /* Just return right value */
- str = right;
- right = NULL;
- break;
- }
- /* The right value is meaningless */
- str = left;
- left = NULL;
- break;
- }
-
- len = strlen(left) + strlen(right) + strlen(op) + 10;
- str = malloc_or_die(len);
- snprintf(str, len, "(%s) %s (%s)",
- left, op, right);
- break;
-
- case FILTER_OP_NOT:
- op = "!";
- right = arg_to_str(filter, arg->op.right);
- if (!right)
- break;
-
- /* See if we can consolidate */
- if (strcmp(right, "TRUE") == 0)
- right_val = 1;
- else if (strcmp(right, "FALSE") == 0)
- right_val = 0;
- if (right_val >= 0) {
- /* just return the opposite */
- str = malloc_or_die(6);
- if (right_val)
- strcpy(str, "FALSE");
- else
- strcpy(str, "TRUE");
- break;
- }
- len = strlen(right) + strlen(op) + 3;
- str = malloc_or_die(len);
- snprintf(str, len, "%s(%s)", op, right);
- break;
-
- default:
- /* ?? */
- break;
- }
- free(left);
- free(right);
- return str;
-}
-
-static char *val_to_str(struct event_filter *filter, struct filter_arg *arg)
-{
- char *str;
-
- str = malloc_or_die(30);
-
- snprintf(str, 30, "%lld", arg->value.val);
-
- return str;
-}
-
-static char *field_to_str(struct event_filter *filter, struct filter_arg *arg)
-{
- return strdup(arg->field.field->name);
-}
-
-static char *exp_to_str(struct event_filter *filter, struct filter_arg *arg)
-{
- char *lstr;
- char *rstr;
- char *op = NULL;
- char *str = NULL;
- int len;
-
- lstr = arg_to_str(filter, arg->exp.left);
- rstr = arg_to_str(filter, arg->exp.right);
- if (!lstr || !rstr)
- goto out;
-
- switch (arg->exp.type) {
- case FILTER_EXP_ADD:
- op = "+";
- break;
- case FILTER_EXP_SUB:
- op = "-";
- break;
- case FILTER_EXP_MUL:
- op = "*";
- break;
- case FILTER_EXP_DIV:
- op = "/";
- break;
- case FILTER_EXP_MOD:
- op = "%";
- break;
- case FILTER_EXP_RSHIFT:
- op = ">>";
- break;
- case FILTER_EXP_LSHIFT:
- op = "<<";
- break;
- case FILTER_EXP_AND:
- op = "&";
- break;
- case FILTER_EXP_OR:
- op = "|";
- break;
- case FILTER_EXP_XOR:
- op = "^";
- break;
- default:
- die("oops in exp");
- }
-
- len = strlen(op) + strlen(lstr) + strlen(rstr) + 4;
- str = malloc_or_die(len);
- snprintf(str, len, "%s %s %s", lstr, op, rstr);
-out:
- free(lstr);
- free(rstr);
-
- return str;
-}
-
-static char *num_to_str(struct event_filter *filter, struct filter_arg *arg)
-{
- char *lstr;
- char *rstr;
- char *str = NULL;
- char *op = NULL;
- int len;
-
- lstr = arg_to_str(filter, arg->num.left);
- rstr = arg_to_str(filter, arg->num.right);
- if (!lstr || !rstr)
- goto out;
-
- switch (arg->num.type) {
- case FILTER_CMP_EQ:
- op = "==";
- /* fall through */
- case FILTER_CMP_NE:
- if (!op)
- op = "!=";
- /* fall through */
- case FILTER_CMP_GT:
- if (!op)
- op = ">";
- /* fall through */
- case FILTER_CMP_LT:
- if (!op)
- op = "<";
- /* fall through */
- case FILTER_CMP_GE:
- if (!op)
- op = ">=";
- /* fall through */
- case FILTER_CMP_LE:
- if (!op)
- op = "<=";
-
- len = strlen(lstr) + strlen(op) + strlen(rstr) + 4;
- str = malloc_or_die(len);
- sprintf(str, "%s %s %s", lstr, op, rstr);
-
- break;
-
- default:
- /* ?? */
- break;
- }
-
-out:
- free(lstr);
- free(rstr);
- return str;
-}
-
-static char *str_to_str(struct event_filter *filter, struct filter_arg *arg)
-{
- char *str = NULL;
- char *op = NULL;
- int len;
-
- switch (arg->str.type) {
- case FILTER_CMP_MATCH:
- op = "==";
- /* fall through */
- case FILTER_CMP_NOT_MATCH:
- if (!op)
- op = "!=";
- /* fall through */
- case FILTER_CMP_REGEX:
- if (!op)
- op = "=~";
- /* fall through */
- case FILTER_CMP_NOT_REGEX:
- if (!op)
- op = "!~";
-
- len = strlen(arg->str.field->name) + strlen(op) +
- strlen(arg->str.val) + 6;
- str = malloc_or_die(len);
- snprintf(str, len, "%s %s \"%s\"",
- arg->str.field->name,
- op, arg->str.val);
- break;
-
- default:
- /* ?? */
- break;
- }
- return str;
-}
-
-static char *arg_to_str(struct event_filter *filter, struct filter_arg *arg)
-{
- char *str;
-
- switch (arg->type) {
- case FILTER_ARG_BOOLEAN:
- str = malloc_or_die(6);
- if (arg->boolean.value)
- strcpy(str, "TRUE");
- else
- strcpy(str, "FALSE");
- return str;
-
- case FILTER_ARG_OP:
- return op_to_str(filter, arg);
-
- case FILTER_ARG_NUM:
- return num_to_str(filter, arg);
-
- case FILTER_ARG_STR:
- return str_to_str(filter, arg);
-
- case FILTER_ARG_VALUE:
- return val_to_str(filter, arg);
-
- case FILTER_ARG_FIELD:
- return field_to_str(filter, arg);
-
- case FILTER_ARG_EXP:
- return exp_to_str(filter, arg);
-
- default:
- /* ?? */
- return NULL;
- }
-
-}
-
-/**
- * pevent_filter_make_string - return a string showing the filter
- * @filter: filter struct with filter information
- * @event_id: the event id to return the filter string with
- *
- * Returns a string that displays the filter contents.
- * This string must be freed with free(str).
- * NULL is returned if no filter is found.
- */
-char *
-pevent_filter_make_string(struct event_filter *filter, int event_id)
-{
- struct filter_type *filter_type;
-
- if (!filter->filters)
- return NULL;
-
- filter_type = find_filter_type(filter, event_id);
-
- if (!filter_type)
- return NULL;
-
- return arg_to_str(filter, filter_type->filter);
-}
-
-/**
- * pevent_filter_compare - compare two filters and return if they are the same
- * @filter1: Filter to compare with @filter2
- * @filter2: Filter to compare with @filter1
- *
- * Returns:
- * 1 if the two filters hold the same content.
- * 0 if they do not.
- */
-int pevent_filter_compare(struct event_filter *filter1, struct event_filter *filter2)
-{
- struct filter_type *filter_type1;
- struct filter_type *filter_type2;
- char *str1, *str2;
- int result;
- int i;
-
- /* Do the easy checks first */
- if (filter1->filters != filter2->filters)
- return 0;
- if (!filter1->filters && !filter2->filters)
- return 1;
-
- /*
- * Now take a look at each of the events to see if they have the same
- * filters to them.
- */
- for (i = 0; i < filter1->filters; i++) {
- filter_type1 = &filter1->event_filters[i];
- filter_type2 = find_filter_type(filter2, filter_type1->event_id);
- if (!filter_type2)
- break;
- if (filter_type1->filter->type != filter_type2->filter->type)
- break;
- switch (filter_type1->filter->type) {
- case FILTER_TRIVIAL_FALSE:
- case FILTER_TRIVIAL_TRUE:
- /* trivial types just need the type compared */
- continue;
- default:
- break;
- }
- /* The best way to compare complex filters is with strings */
- str1 = arg_to_str(filter1, filter_type1->filter);
- str2 = arg_to_str(filter2, filter_type2->filter);
- if (str1 && str2)
- result = strcmp(str1, str2) != 0;
- else
- /* bail out if allocation fails */
- result = 1;
-
- free(str1);
- free(str2);
- if (result)
- break;
- }
-
- if (i < filter1->filters)
- return 0;
- return 1;
-}
-
projects / users / mchehab / rasdaemon.git / commitdiff