From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932093AbeAQQNa (ORCPT ); Wed, 17 Jan 2018 11:13:30 -0500 Received: from mail.kernel.org ([198.145.29.99]:55958 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932067AbeAQQN2 (ORCPT ); Wed, 17 Jan 2018 11:13:28 -0500 DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E95F72175B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=acme@kernel.org From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, "Steven Rostedt (VMware)" , Andrew Morton , Arnaldo Carvalho de Melo Subject: [PATCH 17/32] tools lib traceevent: Fix get_field_str() for dynamic strings Date: Wed, 17 Jan 2018 13:12:07 -0300 Message-Id: <20180117161222.15611-18-acme@kernel.org> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180117161222.15611-1-acme@kernel.org> References: <20180117161222.15611-1-acme@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Steven Rostedt (VMware)" If a field is a dynamic string, get_field_str() returned just the offset/size value and not the string. Have it parse the offset/size correctly to return the actual string. Otherwise filtering fails when trying to filter fields that are dynamic strings. Reported-by: Gopanapalli Pradeep Signed-off-by: Steven Rostedt Acked-by: Namhyung Kim Cc: Andrew Morton Link: http://lkml.kernel.org/r/20180112004823.146333275@goodmis.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/lib/traceevent/parse-filter.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/tools/lib/traceevent/parse-filter.c b/tools/lib/traceevent/parse-filter.c index 2b9048f90bae..431e8b309f6e 100644 --- a/tools/lib/traceevent/parse-filter.c +++ b/tools/lib/traceevent/parse-filter.c @@ -1877,17 +1877,25 @@ static const char *get_field_str(struct filter_arg *arg, struct pevent_record *r struct pevent *pevent; unsigned long long addr; const char *val = NULL; + unsigned int size; char hex[64]; /* If the field is not a string convert it */ if (arg->str.field->flags & FIELD_IS_STRING) { val = record->data + arg->str.field->offset; + size = arg->str.field->size; + + if (arg->str.field->flags & FIELD_IS_DYNAMIC) { + addr = *(unsigned int *)val; + val = record->data + (addr & 0xffff); + size = addr >> 16; + } /* * We need to copy the data since we can't be sure the field * is null terminated. */ - if (*(val + arg->str.field->size - 1)) { + if (*(val + size - 1)) { /* copy it */ memcpy(arg->str.buffer, val, arg->str.field->size); /* the buffer is already NULL terminated */ -- 2.14.3