From a5a178e1ae0192e405830f1bba84548992124e88 Mon Sep 17 00:00:00 2001 From: Stefan Hajnoczi Date: Sun, 4 Sep 2011 16:08:59 +0100 Subject: [PATCH] perf tools: Allow expressions in __print_symbolic() fields The __print_symbolic() function takes a sequence of key-value pairs for pretty-printing a constant. The new kvm:kvm_exit print fmt uses the expression: __print_symbolic(..., { 0x040 + 1, "DB excp" }, ...) Currently only atoms are supported and this print fmt fails to parse. This patch adds support for expressions instead of just atoms so that 0x040 + 1 is parsed successfully. Also add arg_num_eval() support for the '+' operator. Acked-by: Steven Rostedt Cc: Ingo Molnar Cc: Steven Rostedt Link: http://lkml.kernel.org/r/1315148939-14313-1-git-send-email-stefanha@linux.vnet.ibm.com Signed-off-by: Stefan Hajnoczi Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/trace-event-parse.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c index e0a4f65..a4088ce 100644 --- a/tools/perf/util/trace-event-parse.c +++ b/tools/perf/util/trace-event-parse.c @@ -1423,6 +1423,11 @@ static long long arg_num_eval(struct print_arg *arg) die("unknown op '%s'", arg->op.op); } break; + case '+': + left = arg_num_eval(arg->op.left); + right = arg_num_eval(arg->op.right); + val = left + right; + break; default: die("unknown op '%s'", arg->op.op); } @@ -1483,6 +1488,13 @@ process_fields(struct event *event, struct print_flag_sym **list, char **tok) 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; -- 2.7.4