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perf tools: Handle * as typecast in trace parsing

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The '*' is currently only treated as a multiplication, and it
needs to be handled as a typecast pointer.

This is the version used by trace-cmd.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <20091014194358.409327875@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Steven Rostedt 2009-10-14 15:43:36 -04:00 committed by Ingo Molnar
parent 0959b8d65c
commit b99af87482
1 changed files with 22 additions and 28 deletions
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44
tools/perf/util/trace-event-parse.c
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@ -1217,7 +1217,24 @@ process_op(struct event *event, struct print_arg *arg, char **tok)
right = malloc_or_die(sizeof(*right));
type = process_arg(event, right, tok);
type = read_token_item(&token);
*tok = token;
/* could just be a type pointer */
if ((strcmp(arg->op.op, "*") == 0) &&
type == EVENT_DELIM && (strcmp(token, ")") == 0)) {
if (left->type != PRINT_ATOM)
die("bad pointer type");
left->atom.atom = realloc(left->atom.atom,
sizeof(left->atom.atom) + 3);
strcat(left->atom.atom, " *");
*arg = *left;
free(arg);
return type;
}
type = process_arg_token(event, right, tok, type);
arg->op.right = right;
@ -1548,7 +1565,6 @@ process_paren(struct event *event, struct print_arg *arg, char **tok)
{
struct print_arg *item_arg;
enum event_type type;
int ptr_cast = 0;
char *token;
type = process_arg(event, arg, &token);
@ -1556,26 +1572,11 @@ process_paren(struct event *event, struct print_arg *arg, char **tok)
if (type == EVENT_ERROR)
return EVENT_ERROR;
if (type == EVENT_OP) {
/* handle the ptr casts */
if (!strcmp(token, "*")) {
/*
* FIXME: should we zapp whitespaces before ')' ?
* (may require a peek_token_item())
*/
if (__peek_char() == ')') {
ptr_cast = 1;
free_token(token);
type = read_token_item(&token);
}
}
if (!ptr_cast) {
if (type == EVENT_OP)
type = process_op(event, arg, &token);
if (type == EVENT_ERROR)
return EVENT_ERROR;
}
}
if (test_type_token(type, token, EVENT_DELIM, (char *)")")) {
free_token(token);
@ -1601,13 +1602,6 @@ process_paren(struct event *event, struct print_arg *arg, char **tok)
item_arg = malloc_or_die(sizeof(*item_arg));
arg->type = PRINT_TYPE;
if (ptr_cast) {
char *old = arg->atom.atom;
arg->atom.atom = malloc_or_die(strlen(old + 3));
sprintf(arg->atom.atom, "%s *", old);
free(old);
}
arg->typecast.type = arg->atom.atom;
arg->typecast.item = item_arg;
type = process_arg_token(event, item_arg, &token, type);