diff options
Diffstat (limited to 'tools/lib/traceevent/event-parse.c')
| -rw-r--r-- | tools/lib/traceevent/event-parse.c | 5065 |
1 files changed, 5065 insertions, 0 deletions
diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c new file mode 100644 index 00000000000..99853499219 --- /dev/null +++ b/tools/lib/traceevent/event-parse.c @@ -0,0 +1,5065 @@ +/* + * 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, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * 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 "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); +} + +void breakpoint(void) +{ + static int x; + x++; +} + +struct print_arg *alloc_arg(void) +{ + struct print_arg *arg; + + arg = malloc_or_die(sizeof(*arg)); + if (!arg) + return NULL; + memset(arg, 0, sizeof(*arg)); + + return 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_or_die(sizeof(*cmdlines) * pevent->cmdline_count); + + 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); + + 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); + + 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].pid = pid; + cmdlines[pevent->cmdline_count].comm = strdup(comm); + if (!cmdlines[pevent->cmdline_count].comm) + die("malloc comm"); + + 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_or_die(sizeof(*item)); + item->comm = strdup(comm); + if (!item->comm) + die("malloc comm"); + 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_or_die(sizeof(*func_map) * (pevent->func_count + 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; + + item = malloc_or_die(sizeof(*item)); + + item->next = pevent->funclist; + item->func = strdup(func); + if (mod) + item->mod = strdup(mod); + else + item->mod = NULL; + item->addr = addr; + + pevent->funclist = item; + + pevent->func_count++; + + return 0; +} + +/** + * 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 func_map *fa = a; + const struct func_map *fb = b; + + if (fa->addr < fb->addr) + return -1; + if (fa->addr > fb->addr) + return 1; + + return 0; +} + +static void printk_map_init(struct pevent *pevent) +{ + struct printk_list *printklist; + struct printk_list *item; + struct printk_map *printk_map; + int i; + + printk_map = malloc_or_die(sizeof(*printk_map) * (pevent->printk_count + 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; +} + +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); + + 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; + + item = malloc_or_die(sizeof(*item)); + + item->next = pevent->printklist; + pevent->printklist = item; + item->printk = strdup(fmt); + item->addr = addr; + + pevent->printk_count++; + + return 0; +} + +/** + * 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) +{ + struct event_format *event; + + event = malloc_or_die(sizeof(*event)); + memset(event, 0, sizeof(*event)); + + return event; +} + +static void add_event(struct pevent *pevent, struct event_format *event) +{ + int i; + + if (!pevent->events) + pevent->events = malloc_or_die(sizeof(event)); + else + pevent->events = + realloc(pevent->events, sizeof(event) * + (pevent->nr_events + 1)); + if (!pevent->events) + die("Can not allocate 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; +} + +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_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 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: + *tok = malloc_or_die(2); + (*tok)[0] = ch; + (*tok)[1] = 0; + return type; + + case EVENT_OP: + switch (ch) { + case '-': + next_ch = __peek_char(); + if (next_ch == '>') { + buf[i++] = __read_char(); + break; + } + /* fall through */ + case '+': + case '|': + case '&': + case '>': + case '<': + last_ch = ch; + ch = __peek_char(); + if (ch != last_ch) + goto test_equal; + buf[i++] = __read_char(); + switch (last_ch) { + case '>': + case '<': + goto test_equal; + default: + break; + } + break; + case '!': + case '=': + goto test_equal; + default: /* what should we do instead? */ + break; + } + buf[i] = 0; + *tok = strdup(buf); + return type; + + test_equal: + ch = __peek_char(); + if (ch == '=') + buf[i++] = __read_char(); + 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; + if (*tok) { + *tok = realloc(*tok, tok_size + BUFSIZ); + if (!*tok) + return EVENT_NONE; + strcat(*tok, buf); + } else + *tok = strdup(buf); + + if (!*tok) + return EVENT_NONE; + tok_size += BUFSIZ; + i = 0; + } + last_ch = ch; + ch = __read_char(); + buf[i++] = ch; + /* the '\' '\' will cancel itself */ + if (ch == '\\' && last_ch == '\\') + last_ch = 0; + } while (ch != quote_ch || last_ch == '\\'); + /* remove the last quote */ + i--; + + /* + * 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; + if (*tok) { + *tok = realloc(*tok, tok_size + BUFSIZ); + if (!*tok) + return EVENT_NONE; + strcat(*tok, buf); + } else + *tok = strdup(buf); + + if (!*tok) + return EVENT_NONE; + tok_size += BUFSIZ; + i = 0; + } + ch = __read_char(); + buf[i++] = ch; + } + + out: + buf[i] = 0; + if (*tok) { + *tok = realloc(*tok, tok_size + i); + if (!*tok) + return EVENT_NONE; + strcat(*tok, buf); + } else + *tok = strdup(buf); + if (!*tok) + return EVENT_NONE; + + 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 = malloc_or_die(sizeof(*field)); + memset(field, 0, sizeof(*field)); + 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) { + field->type = realloc(field->type, + strlen(field->type) + + strlen(last_token) + 2); + strcat(field->type, " "); + strcat(field->type, last_token); + free(last_token); + } else + field->type = last_token; + last_token = token; + continue; + } + + break; + } + + if (!field->type) { + die("no type found"); + goto fail; + } + field->name = last_token; + + if (test_type(type, EVENT_OP)) + goto fail; + + if (strcmp(token, "[") == 0) { + enum event_type last_type = type; + char *brackets = token; + int len; + + field->flags |= FIELD_IS_ARRAY; + + type = read_token(&token); + + 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; + + brackets = realloc(brackets, + strlen(brackets) + + strlen(token) + len); + 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) { + die("failed to find token"); + goto fail; + } + } + + free_token(token); + + brackets = realloc(brackets, strlen(brackets) + 2); + strcat(brackets, "]"); + + /* add brackets to type */ + + type = read_token(&token); + /* + * If the next token is not an OP, then it is of + * the format: type [] item; + */ + if (type == EVENT_ITEM) { + field->type = realloc(field->type, + strlen(field->type) + + strlen(field->name) + + strlen(brackets) + 2); + strcat(field->type, " "); + strcat(field->type, field->name); + free_token(field->name); + strcat(field->type, brackets); |