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tools lib traceevent: Remove some die() calls 

Cleaned event-parse.c this time, just propagate the errors and in handle
them the call sites.

Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/n/tip-9ebpr2vgfk2qs2841i99sa8y@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2012-09-12 17:30:50 -03:00
parent b85119200d
commit a6d2a61ac6
1 changed files with 175 additions and 74 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

249
tools/lib/traceevent/event-parse.c
View File

@ -31,6 +31,7 @@
#include <ctype.h>
#include <errno.h>
#include <stdint.h>
#include <limits.h>
#include "event-parse.h"
#include "event-utils.h"
@ -151,7 +152,9 @@ static int cmdline_init(struct pevent *pevent)
struct cmdline *cmdlines;
int i;
cmdlines = malloc_or_die(sizeof(*cmdlines) * pevent->cmdline_count);
cmdlines = malloc(sizeof(*cmdlines) * pevent->cmdline_count);
if (!cmdlines)
return -1;
i = 0;
while (cmdlist) {
@ -179,8 +182,8 @@ static char *find_cmdline(struct pevent *pevent, int pid)
if (!pid)
return "<idle>";
if (!pevent->cmdlines)
cmdline_init(pevent);
if (!pevent->cmdlines && cmdline_init(pevent))
return "<not enough memory for cmdlines!>";
key.pid = pid;
@ -208,8 +211,8 @@ int pevent_pid_is_registered(struct pevent *pevent, int pid)
if (!pid)
return 1;
if (!pevent->cmdlines)
cmdline_init(pevent);
if (!pevent->cmdlines && cmdline_init(pevent))
return 0;
key.pid = pid;
@ -251,10 +254,14 @@ static int add_new_comm(struct pevent *pevent, const char *comm, int pid)
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) {
free(cmdlines);
errno = ENOMEM;
return -1;
}
cmdlines[pevent->cmdline_count].pid = pid;
if (cmdlines[pevent->cmdline_count].comm)
pevent->cmdline_count++;
@ -281,10 +288,15 @@ int pevent_register_comm(struct pevent *pevent, const char *comm, int pid)
if (pevent->cmdlines)
return add_new_comm(pevent, comm, pid);
item = malloc_or_die(sizeof(*item));
item = malloc(sizeof(*item));
if (!item)
return -1;
item->comm = strdup(comm);
if (!item->comm)
die("malloc comm");
if (!item->comm) {
free(item);
return -1;
}
item->pid = pid;
item->next = pevent->cmdlist;
@ -348,7 +360,10 @@ static int func_map_init(struct pevent *pevent)
struct func_map *func_map;
int i;
func_map = malloc_or_die(sizeof(*func_map) * (pevent->func_count + 1));
func_map = malloc(sizeof(*func_map) * (pevent->func_count + 1));
if (!func_map)
return -1;
funclist = pevent->funclist;
i = 0;
@ -448,25 +463,36 @@ pevent_find_function_address(struct pevent *pevent, unsigned long long addr)
int pevent_register_function(struct pevent *pevent, char *func,
unsigned long long addr, char *mod)
{
struct func_list *item;
struct func_list *item = malloc(sizeof(*item));
item = malloc_or_die(sizeof(*item));
if (!item)
return -1;
item->next = pevent->funclist;
item->func = strdup(func);
if (mod)
if (!item->func)
goto out_free;
if (mod) {
item->mod = strdup(mod);
else
if (!item->mod)
goto out_free_func;
} else
item->mod = NULL;
item->addr = addr;
if (!item->func || (mod && !item->mod))
die("malloc func");
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;
}
/**
@ -517,14 +543,16 @@ static int printk_cmp(const void *a, const void *b)
return 0;
}
static void printk_map_init(struct pevent *pevent)
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_or_die(sizeof(*printk_map) * (pevent->printk_count + 1));
printk_map = malloc(sizeof(*printk_map) * (pevent->printk_count + 1));
if (!printk_map)
return -1;
printklist = pevent->printklist;
@ -542,6 +570,8 @@ static void printk_map_init(struct pevent *pevent)
pevent->printk_map = printk_map;
pevent->printklist = NULL;
return 0;
}
static struct printk_map *
@ -550,8 +580,8 @@ 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);
if (!pevent->printk_map && printk_map_init(pevent))
return NULL;
key.addr = addr;
@ -573,21 +603,27 @@ find_printk(struct pevent *pevent, unsigned long long addr)
int pevent_register_print_string(struct pevent *pevent, char *fmt,
unsigned long long addr)
{
struct printk_list *item;
struct printk_list *item = malloc(sizeof(*item));
item = malloc_or_die(sizeof(*item));
if (!item)
return -1;
item->next = pevent->printklist;
item->printk = strdup(fmt);
item->addr = addr;
item->printk = strdup(fmt);
if (!item->printk)
die("malloc fmt");
goto out_free;
pevent->printklist = item;
pevent->printk_count++;
return 0;
out_free:
free(item);
errno = ENOMEM;
return -1;
}
/**
@ -615,14 +651,15 @@ static struct event_format *alloc_event(void)
return calloc(1, sizeof(struct event_format));
}
static void add_event(struct pevent *pevent, struct event_format *event)
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 = realloc(pevent->events, sizeof(event) *
(pevent->nr_events + 1));
if (!pevent->events)
die("Can not allocate events");
pevent->events = events;
for (i = 0; i < pevent->nr_events; i++) {
if (pevent->events[i]->id > event->id)
@ -637,6 +674,8 @@ static void add_event(struct pevent *pevent, struct event_format *event)
pevent->nr_events++;
event->pevent = pevent;
return 0;
}
static int event_item_type(enum event_type type)
@ -1751,8 +1790,10 @@ process_op(struct event_format *event, struct print_arg *arg, char **tok)
type == EVENT_DELIM && (strcmp(token, ")") == 0)) {
char *new_atom;
if (left->type != PRINT_ATOM)
die("bad pointer type");
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)
@ -1870,7 +1911,11 @@ eval_type_str(unsigned long long val, const char *type, int pointer)
return val;
}
ref = malloc_or_die(len);
ref = malloc(len);
if (!ref) {
do_warning("%s: not enough memory!", __func__);
return val;
}
memcpy(ref, type, len);
/* chop off the " *" */
@ -1947,8 +1992,10 @@ eval_type_str(unsigned long long val, const char *type, int pointer)
static unsigned long long
eval_type(unsigned long long val, struct print_arg *arg, int pointer)
{
if (arg->type != PRINT_TYPE)
die("expected type argument");
if (arg->type != PRINT_TYPE) {
do_warning("expected type argument");
return 0;
}
return eval_type_str(val, arg->typecast.type, pointer);
}
@ -2133,7 +2180,7 @@ static char *arg_eval (struct print_arg *arg)
case PRINT_STRING:
case PRINT_BSTRING:
default:
die("invalid eval type %d", arg->type);
do_warning("invalid eval type %d", arg->type);
break;
}
@ -2431,8 +2478,10 @@ process_paren(struct event_format *event, struct print_arg *arg, char **tok)
/* make this a typecast and contine */
/* prevous must be an atom */
if (arg->type != PRINT_ATOM)
die("previous needed to be PRINT_ATOM");
if (arg->type != PRINT_ATOM) {
do_warning("previous needed to be PRINT_ATOM");
goto out_free;
}
item_arg = alloc_arg();
@ -2674,7 +2723,8 @@ process_arg_token(struct event_format *event, struct print_arg *arg,
case EVENT_ERROR ... EVENT_NEWLINE:
default:
die("unexpected type %d", type);
do_warning("unexpected type %d", type);
return EVENT_ERROR;
}
*tok = token;
@ -2921,8 +2971,10 @@ static int get_common_info(struct pevent *pevent,
* All events should have the same common elements.
* Pick any event to find where the type is;
*/
if (!pevent->events)
die("no event_list!");
if (!pevent->events) {
do_warning("no event_list!");
return -1;
}
event = pevent->events[0];
field = pevent_find_common_field(event, type);
@ -3080,7 +3132,8 @@ eval_num_arg(void *data, int size, struct event_format *event, struct print_arg
if (!arg->field.field) {
arg->field.field = pevent_find_any_field(event, arg->field.name);
if (!arg->field.field)
die("field %s not found", arg->field.name);
goto out_warning_field;
}
/* must be a number */
val = pevent_read_number(pevent, data + arg->field.field->offset,
@ -3141,8 +3194,10 @@ eval_num_arg(void *data, int size, struct event_format *event, struct print_arg
if (!larg->field.field) {
larg->field.field =
pevent_find_any_field(event, larg->field.name);
if (!larg->field.field)
die("field %s not found", larg->field.name);
if (!larg->field.field) {
arg = larg;
goto out_warning_field;
}
}
field_size = larg->field.field->elementsize;
offset = larg->field.field->offset +
@ -3178,7 +3233,7 @@ eval_num_arg(void *data, int size, struct event_format *event, struct print_arg
val = left != right;
break;
default:
die("unknown op '%s'", arg->op.op);
goto out_warning_op;
}
break;
case '~':
@ -3208,7 +3263,7 @@ eval_num_arg(void *data, int size, struct event_format *event, struct print_arg
val = left <= right;
break;
default:
die("unknown op '%s'", arg->op.op);
goto out_warning_op;
}
break;
case '>':
@ -3223,12 +3278,13 @@ eval_num_arg(void *data, int size, struct event_format *event, struct print_arg
val = left >= right;
break;
default:
die("unknown op '%s'", arg->op.op);
goto out_warning_op;
}
break;
case '=':
if (arg->op.op[1] != '=')
die("unknown op '%s'", arg->op.op);
goto out_warning_op;
val = left == right;
break;
case '-':
@ -3244,13 +3300,21 @@ eval_num_arg(void *data, int size, struct event_format *event, struct print_arg
val = left * right;
break;
default:
die("unknown op '%s'", arg->op.op);
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 {
@ -3327,8 +3391,10 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
field = arg->field.field;
if (!field) {
field = pevent_find_any_field(event, arg->field.name);
if (!field)
die("field %s not found", 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 */
@ -3345,7 +3411,11 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
trace_seq_printf(s, "%lx", addr);
break;
}
str = malloc_or_die(len + 1);
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);
@ -3385,7 +3455,7 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
str = arg->hex.field->field.name;
field = pevent_find_any_field(event, str);
if (!field)
die("field %s not found", str);
goto out_warning_field;
arg->hex.field->field.field = field;
}
hex = data + field->offset;
@ -3437,6 +3507,11 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
/* well... */
break;
}
return;
out_warning_field:
do_warning("%s: field %s not found", __func__, arg->field.name);
}
static unsigned long long
@ -3463,7 +3538,11 @@ process_defined_func(struct trace_seq *s, void *data, int size,
farg = arg->func.args;
param = func_handle->params;
args = malloc_or_die(sizeof(*args) * func_handle->nr_args);
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:
@ -3475,12 +3554,18 @@ process_defined_func(struct trace_seq *s, void *data, int size,
trace_seq_init(&str);
print_str_arg(&str, data, size, event, "%s", -1, farg);
trace_seq_terminate(&str);
string = malloc_or_die(sizeof(*string));
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)
die("malloc str");
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);
@ -3490,14 +3575,15 @@ process_defined_func(struct trace_seq *s, void *data, int size,
* Something went totally wrong, this is not
* an input error, something in this code broke.
*/
die("Unexpected end of arguments\n");
break;
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;
@ -3538,11 +3624,15 @@ static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struc
if (!field) {
field = pevent_find_field(event, "buf");
if (!field)
die("can't find buffer field for binary printk");
if (!field) {
do_warning("can't find buffer field for binary printk");
return NULL;
}
ip_field = pevent_find_field(event, "ip");
if (!ip_field)
die("can't find ip field for binary printk");
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;
}
@ -3637,7 +3727,7 @@ static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struc
arg->type = PRINT_BSTRING;
arg->string.string = strdup(bptr);
if (!arg->string.string)
break;
goto out_free;
bptr += strlen(bptr) + 1;
*next = arg;
next = &arg->next;
@ -3669,8 +3759,10 @@ get_bprint_format(void *data, int size __maybe_unused,
if (!field) {
field = pevent_find_field(event, "fmt");
if (!field)
die("can't find format field for binary printk");
if (!field) {
do_warning("can't find format field for binary printk");
return NULL;
}
pevent->bprint_fmt_field = field;
}
@ -3723,8 +3815,11 @@ static void print_mac_arg(struct trace_seq *s, int mac, void *data, int size,
if (!arg->field.field) {
arg->field.field =
pevent_find_any_field(event, arg->field.name);
if (!arg->field.field)
die("field %s not found", 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");
@ -4380,7 +4475,10 @@ get_event_fields(const char *type, const char *name,
struct format_field *field;
int i = 0;
fields = malloc_or_die(sizeof(*fields) * (count + 1));
fields = malloc(sizeof(*fields) * (count + 1));
if (!fields)
return NULL;
for (field = list; field; field = field->next) {
fields[i++] = field;
if (i == count + 1) {
@ -4775,7 +4873,8 @@ enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf,
}
show_warning = 1;
add_event(pevent, event);
if (add_event(pevent, event))
goto event_alloc_failed;
if (!ret && (event->flags & EVENT_FL_ISFTRACE)) {
struct format_field *field;
@ -4808,7 +4907,9 @@ enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf,
event_parse_failed:
event->flags |= EVENT_FL_FAILED;
/* still add it even if it failed */
add_event(pevent, event);
if (add_event(pevent, event))
goto event_alloc_failed;
return ret;
event_alloc_failed: