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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2009-06-08 14:11:57 -0400
committerIngo Molnar <mingo@elte.hu>2009-06-08 17:10:43 -0400
commitdab5855b12411334355ba21349a06700e4ae7a3b (patch)
treeab4e5c1893fc24e0bdb39ab8fc291aba39278c35 /mm
parent820a644211bc1ac7715333abdb0f0b9ea4fbb549 (diff)
perf_counter: Add mmap event hooks to mprotect()
Some JIT compilers allocate memory for generated code with posix_memalign() + mprotect() so we need to hook into mprotect() to make sure 'perf' is aware that we're executing code in anonymous memory. [ penberg@cs.helsinki.fi: move the hook to sys_mprotect() ] Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> LKML-Reference: <Pine.LNX.4.64.0906082111030.12407@melkki.cs.Helsinki.FI> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'mm')
-rw-r--r--mm/mprotect.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/mprotect.c b/mm/mprotect.c
index 258197b76fb4..d80311baeb2d 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -23,6 +23,7 @@
23#include <linux/swapops.h> 23#include <linux/swapops.h>
24#include <linux/mmu_notifier.h> 24#include <linux/mmu_notifier.h>
25#include <linux/migrate.h> 25#include <linux/migrate.h>
26#include <linux/perf_counter.h>
26#include <asm/uaccess.h> 27#include <asm/uaccess.h>
27#include <asm/pgtable.h> 28#include <asm/pgtable.h>
28#include <asm/cacheflush.h> 29#include <asm/cacheflush.h>
@@ -299,6 +300,7 @@ SYSCALL_DEFINE3(mprotect, unsigned long, start, size_t, len,
299 error = mprotect_fixup(vma, &prev, nstart, tmp, newflags); 300 error = mprotect_fixup(vma, &prev, nstart, tmp, newflags);
300 if (error) 301 if (error)
301 goto out; 302 goto out;
303 perf_counter_mmap(vma);
302 nstart = tmp; 304 nstart = tmp;
303 305
304 if (nstart < prev->vm_end) 306 if (nstart < prev->vm_end)