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perf_counter: Add mmap event hooks to mprotect()

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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.

[ [email protected]: move the hook to sys_mprotect() ]
Cc: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: Pekka Enberg <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Peter Zijlstra 2009-06-08 21:11:57 +03:00 • committed by Ingo Molnar
commit dab5855b12
1 changed files with 2 additions and 0 deletions
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2
mm/mprotect.c
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@ -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)