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-rw-r--r--compiler-rt/lib/interception/interception.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/compiler-rt/lib/interception/interception.h b/compiler-rt/lib/interception/interception.h
index c8a0543dcb6..00675341830 100644
--- a/compiler-rt/lib/interception/interception.h
+++ b/compiler-rt/lib/interception/interception.h
@@ -30,7 +30,12 @@ typedef __sanitizer::s64 INTMAX_T;
// WARNING: OFF_T may be different from OS type off_t, depending on the value of
// _FILE_OFFSET_BITS. This definition of OFF_T matches the ABI of system calls
// like pread and mmap, as opposed to pread64 and mmap64.
+// Mac is special.
+#ifdef __APPLE__
+typedef __sanitizer::u64 OFF_T;
+#else
typedef __sanitizer::uptr OFF_T;
+#endif
typedef __sanitizer::u64 OFF64_T;
// How to add an interceptor:
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