perf: Add non-exec mmap() tracking

[deliverable/linux.git] / kernel / perf_event.c

diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index b39bec346e806e3ba4e003d69c5b46449d32e432..227ed9c8ec34442e7a4e0de7ec40e5e584e5ba39 100644 (file)
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -1891,7 +1891,7 @@ static void free_event(struct perf_event *event)
 
        if (!event->parent) {
                atomic_dec(&nr_events);
-               if (event->attr.mmap)
+               if (event->attr.mmap || event->attr.mmap_data)
                        atomic_dec(&nr_mmap_events);
                if (event->attr.comm)
                        atomic_dec(&nr_comm_events);
@@ -3491,7 +3491,7 @@ perf_event_read_event(struct perf_event *event,
 /*
  * task tracking -- fork/exit
  *
- * enabled by: attr.comm | attr.mmap | attr.task
+ * enabled by: attr.comm | attr.mmap | attr.mmap_data | attr.task
  */
 
 struct perf_task_event {
@@ -3541,7 +3541,8 @@ static int perf_event_task_match(struct perf_event *event)
        if (event->cpu != -1 && event->cpu != smp_processor_id())
                return 0;
 
-       if (event->attr.comm || event->attr.mmap || event->attr.task)
+       if (event->attr.comm || event->attr.mmap ||
+           event->attr.mmap_data || event->attr.task)
                return 1;
 
        return 0;
@@ -3766,7 +3767,8 @@ static void perf_event_mmap_output(struct perf_event *event,
 }
 
 static int perf_event_mmap_match(struct perf_event *event,
-                                  struct perf_mmap_event *mmap_event)
+                                  struct perf_mmap_event *mmap_event,
+                                  int executable)
 {
        if (event->state < PERF_EVENT_STATE_INACTIVE)
                return 0;
@@ -3774,19 +3776,21 @@ static int perf_event_mmap_match(struct perf_event *event,
        if (event->cpu != -1 && event->cpu != smp_processor_id())
                return 0;
 
-       if (event->attr.mmap)
+       if ((!executable && event->attr.mmap_data) ||
+           (executable && event->attr.mmap))
                return 1;
 
        return 0;
 }
 
 static void perf_event_mmap_ctx(struct perf_event_context *ctx,
-                                 struct perf_mmap_event *mmap_event)
+                                 struct perf_mmap_event *mmap_event,
+                                 int executable)
 {
        struct perf_event *event;
 
        list_for_each_entry_rcu(event, &ctx->event_list, event_entry) {
-               if (perf_event_mmap_match(event, mmap_event))
+               if (perf_event_mmap_match(event, mmap_event, executable))
                        perf_event_mmap_output(event, mmap_event);
        }
 }
@@ -3830,6 +3834,14 @@ static void perf_event_mmap_event(struct perf_mmap_event *mmap_event)
                if (!vma->vm_mm) {
                        name = strncpy(tmp, "[vdso]", sizeof(tmp));
                        goto got_name;
+               } else if (vma->vm_start <= vma->vm_mm->start_brk &&
+                               vma->vm_end >= vma->vm_mm->brk) {
+                       name = strncpy(tmp, "[heap]", sizeof(tmp));
+                       goto got_name;
+               } else if (vma->vm_start <= vma->vm_mm->start_stack &&
+                               vma->vm_end >= vma->vm_mm->start_stack) {
+                       name = strncpy(tmp, "[stack]", sizeof(tmp));
+                       goto got_name;
                }
 
                name = strncpy(tmp, "//anon", sizeof(tmp));
@@ -3846,17 +3858,17 @@ got_name:
 
        rcu_read_lock();
        cpuctx = &get_cpu_var(perf_cpu_context);
-       perf_event_mmap_ctx(&cpuctx->ctx, mmap_event);
+       perf_event_mmap_ctx(&cpuctx->ctx, mmap_event, vma->vm_flags & VM_EXEC);
        ctx = rcu_dereference(current->perf_event_ctxp);
        if (ctx)
-               perf_event_mmap_ctx(ctx, mmap_event);
+               perf_event_mmap_ctx(ctx, mmap_event, vma->vm_flags & VM_EXEC);
        put_cpu_var(perf_cpu_context);
        rcu_read_unlock();
 
        kfree(buf);
 }
 
-void __perf_event_mmap(struct vm_area_struct *vma)
+void perf_event_mmap(struct vm_area_struct *vma)
 {
        struct perf_mmap_event mmap_event;
 
@@ -4911,7 +4923,7 @@ done:
 
        if (!event->parent) {
                atomic_inc(&nr_events);
-               if (event->attr.mmap)
+               if (event->attr.mmap || event->attr.mmap_data)
                        atomic_inc(&nr_mmap_events);
                if (event->attr.comm)
                        atomic_inc(&nr_comm_events);