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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2009-06-08 21:11:57 +0300
committerIngo Molnar <mingo@elte.hu>2009-06-08 23:10:43 +0200
commitdab5855b12411334355ba21349a06700e4ae7a3b (patch)
treeab4e5c1893fc24e0bdb39ab8fc291aba39278c35 /mm/mprotect.c
parent820a644211bc1ac7715333abdb0f0b9ea4fbb549 (diff)
downloadvexpress-lsk-dab5855b12411334355ba21349a06700e4ae7a3b.tar.gz
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/mprotect.c')
-rw-r--r--mm/mprotect.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/mprotect.c b/mm/mprotect.c
index 258197b76fb..d80311baeb2 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -23,6 +23,7 @@
#include <linux/swapops.h>
#include <linux/mmu_notifier.h>
#include <linux/migrate.h>
+#include <linux/perf_counter.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/cacheflush.h>
@@ -299,6 +300,7 @@ SYSCALL_DEFINE3(mprotect, unsigned long, start, size_t, len,
error = mprotect_fixup(vma, &prev, nstart, tmp, newflags);
if (error)
goto out;
+ perf_counter_mmap(vma);
nstart = tmp;
if (nstart < prev->vm_end)