Commit-ID: 2fe85427e3bf65d791700d065132772fc26e4d75 Gitweb: http://git.kernel.org/tip/2fe85427e3bf65d791700d065132772fc26e4d75 Author: Stephane Eranian <[email protected]> AuthorDate: Thu, 24 Jan 2013 16:10:39 +0100 Committer: Arnaldo Carvalho de Melo <[email protected]> CommitDate: Mon, 1 Apr 2013 12:19:02 -0300
perf: Add PERF_RECORD_MISC_MMAP_DATA to RECORD_MMAP 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 <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> --- 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 5b57620..964a450 100644 --- a/include/uapi/linux/perf_event.h +++ b/include/uapi/linux/perf_event.h @@ -445,6 +445,7 @@ 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 77c96d1..98c0845 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -4791,6 +4791,9 @@ got_name: 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(); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
