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-rw-r--r--executor/executor_bsd.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/executor/executor_bsd.h b/executor/executor_bsd.h
index e8530f614..0eb76c588 100644
--- a/executor/executor_bsd.h
+++ b/executor/executor_bsd.h
@@ -27,7 +27,7 @@ static void os_init(int argc, char** argv, void* data, size_t data_size)
int prot = PROT_READ | PROT_WRITE | PROT_EXEC;
#endif
- int flags = MAP_ANON | MAP_PRIVATE | MAP_FIXED;
+ int flags = MAP_ANON | MAP_PRIVATE | MAP_FIXED_EXCLUSIVE;
#if GOOS_freebsd
// Fail closed if the chosen data offset conflicts with an existing mapping.
flags |= MAP_EXCL;