From c2e6dc2b268cca44d522b2ee86147f0d30d7e3e4 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Tue, 15 Nov 2011 18:47:48 -0500 Subject: tools lib traceevent: Add support for "%.*s" in bprintk events The arg notation of '*' in bprintks is not handled by the parser. Implement it so that they show up properly in the output and do not kill the tracer from reporting events. Reported-by: Johannes Berg Signed-off-by: Steven Rostedt Link: http://lkml.kernel.org/n/tip-t0ctq7t1xz3ud6wv4v886jou@git.kernel.org Signed-off-by: Namhyung Kim --- tools/lib/traceevent/event-parse.c | 34 +++++++++++++++++++++++++--------- 1 file changed, 25 insertions(+), 9 deletions(-) (limited to 'tools/lib') diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c index 83f0a8a..0644c2a 100644 --- a/tools/lib/traceevent/event-parse.c +++ b/tools/lib/traceevent/event-parse.c @@ -3370,7 +3370,7 @@ static void print_str_arg(struct trace_seq *s, void *data, int size, break; } case PRINT_BSTRING: - trace_seq_printf(s, format, arg->string.string); + print_str_to_seq(s, format, len_arg, arg->string.string); break; case PRINT_OP: /* @@ -3471,6 +3471,7 @@ static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struc unsigned long long ip, val; char *ptr; void *bptr; + int vsize; field = pevent->bprint_buf_field; ip_field = pevent->bprint_ip_field; @@ -3519,6 +3520,8 @@ static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struc goto process_again; case '0' ... '9': goto process_again; + case '.': + goto process_again; case 'p': ls = 1; /* fall through */ @@ -3526,23 +3529,29 @@ static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struc case 'u': case 'x': case 'i': - /* the pointers are always 4 bytes aligned */ - bptr = (void *)(((unsigned long)bptr + 3) & - ~3); switch (ls) { case 0: - ls = 4; + vsize = 4; break; case 1: - ls = pevent->long_size; + vsize = pevent->long_size; break; case 2: - ls = 8; + vsize = 8; default: + vsize = ls; /* ? */ break; } - val = pevent_read_number(pevent, bptr, ls); - bptr += ls; + /* 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(); arg->next = NULL; arg->type = PRINT_ATOM; @@ -3550,6 +3559,13 @@ static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struc sprintf(arg->atom.atom, "%lld", val); *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(); -- cgit v1.1