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perf: Add non-exec mmap() tracking

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Add the capacility to track data mmap()s. This can be used together
with PERF_SAMPLE_ADDR for data profiling.

Signed-off-by: Anton Blanchard <[email protected]>
[Updated code for stable perf ABI]
Signed-off-by: Eric B Munson <[email protected]>
Signed-off-by: Peter Zijlstra <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Steven Rostedt <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Eric B Munson 2010-05-18 15:30:49 +01:00 • committed by Ingo Molnar
commit 3af9e85928
5 changed files with 35 additions and 22 deletions
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6
mm/mmap.c
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@ -1734,8 +1734,10 @@ int expand_upwards(struct vm_area_struct *vma, unsigned long address)
grow = (address - vma->vm_end) >> PAGE_SHIFT;
error = acct_stack_growth(vma, size, grow);
if (!error)
if (!error) {
vma->vm_end = address;
perf_event_mmap(vma);
}
}
anon_vma_unlock(vma);
return error;
@ -1781,6 +1783,7 @@ static int expand_downwards(struct vm_area_struct *vma,
if (!error) {
vma->vm_start = address;
vma->vm_pgoff -= grow;
perf_event_mmap(vma);
}
}
anon_vma_unlock(vma);
@ -2208,6 +2211,7 @@ unsigned long do_brk(unsigned long addr, unsigned long len)
vma->vm_page_prot = vm_get_page_prot(flags);
vma_link(mm, vma, prev, rb_link, rb_parent);
out:
perf_event_mmap(vma);
mm->total_vm += len >> PAGE_SHIFT;
if (flags & VM_LOCKED) {
if (!mlock_vma_pages_range(vma, addr, addr + len))