Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753990Ab2KUMxX (ORCPT ); Wed, 21 Nov 2012 07:53:23 -0500 Received: from mail-wi0-f172.google.com ([209.85.212.172]:35056 "EHLO mail-wi0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753676Ab2KUMwI (ORCPT ); Wed, 21 Nov 2012 07:52:08 -0500 From: Stephane Eranian To: linux-kernel@vger.kernel.org Cc: peterz@infradead.org, mingo@elte.hu, ak@linux.intel.com, acme@redhat.com, jolsa@redhat.com, namhyung.kim@lge.com Subject: [PATCH v3 15/19] perf: add PERF_RECORD_MISC_MMAP_DATA to RECORD_MMAP Date: Wed, 21 Nov 2012 13:49:41 +0100 Message-Id: <1353502185-26521-16-git-send-email-eranian@google.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1353502185-26521-1-git-send-email-eranian@google.com> References: <1353502185-26521-1-git-send-email-eranian@google.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1772 Lines: 49 Type of mapping was lost and made it hard for a tool to distinguish code vs. data mmaps. Perf has the ability to distinguish the two. Use a bit in the header->misc bitmask to keep track of the mmap type. If PERF_RECORD_MISC_MMAP_DATA is set then the mapping is not executable (!VM_EXEC). If not set, then the mapping is executable. Signed-off-by: Stephane Eranian --- include/uapi/linux/perf_event.h | 1 + kernel/events/core.c | 3 +++ 2 files changed, 4 insertions(+) diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h index b2a78bb..0fa3feb 100644 --- a/include/uapi/linux/perf_event.h +++ b/include/uapi/linux/perf_event.h @@ -446,6 +446,7 @@ struct perf_event_mmap_page { #define PERF_RECORD_MISC_GUEST_KERNEL (4 << 0) #define PERF_RECORD_MISC_GUEST_USER (5 << 0) +#define PERF_RECORD_MISC_MMAP_DATA (1 << 13) /* * Indicates that the content of PERF_SAMPLE_IP points to * the actual instruction that triggered the event. See also diff --git a/kernel/events/core.c b/kernel/events/core.c index 94b2c70..e7318a7 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -4764,6 +4764,9 @@ static void perf_event_mmap_event(struct perf_mmap_event *mmap_event) mmap_event->file_name = name; mmap_event->file_size = size; + if (!(vma->vm_flags & VM_EXEC)) + mmap_event->event_id.header.misc |= PERF_RECORD_MISC_MMAP_DATA; + mmap_event->event_id.header.size = sizeof(mmap_event->event_id) + size; rcu_read_lock(); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/