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diff --git a/contrib/compiler-rt/lib/msan/msan_interface_internal.h b/contrib/compiler-rt/lib/msan/msan_interface_internal.h
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+//===-- msan_interface_internal.h -------------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is a part of MemorySanitizer.
+//
+// Private MSan interface header.
+//===----------------------------------------------------------------------===//
+
+#ifndef MSAN_INTERFACE_INTERNAL_H
+#define MSAN_INTERFACE_INTERNAL_H
+
+#include "sanitizer_common/sanitizer_internal_defs.h"
+
+extern "C" {
+// FIXME: document all interface functions.
+
+SANITIZER_INTERFACE_ATTRIBUTE
+int __msan_get_track_origins();
+
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_init();
+
+// Print a warning and maybe return.
+// This function can die based on common_flags()->exitcode.
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_warning();
+
+// Print a warning and die.
+// Intrumentation inserts calls to this function when building in "fast" mode
+// (i.e. -mllvm -msan-keep-going)
+SANITIZER_INTERFACE_ATTRIBUTE __attribute__((noreturn))
+void __msan_warning_noreturn();
+
+using __sanitizer::uptr;
+using __sanitizer::sptr;
+using __sanitizer::uu64;
+using __sanitizer::uu32;
+using __sanitizer::uu16;
+using __sanitizer::u64;
+using __sanitizer::u32;
+using __sanitizer::u16;
+using __sanitizer::u8;
+
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_maybe_warning_1(u8 s, u32 o);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_maybe_warning_2(u16 s, u32 o);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_maybe_warning_4(u32 s, u32 o);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_maybe_warning_8(u64 s, u32 o);
+
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_maybe_store_origin_1(u8 s, void *p, u32 o);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_maybe_store_origin_2(u16 s, void *p, u32 o);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_maybe_store_origin_4(u32 s, void *p, u32 o);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_maybe_store_origin_8(u64 s, void *p, u32 o);
+
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_unpoison(const void *a, uptr size);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_unpoison_string(const char *s);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_clear_and_unpoison(void *a, uptr size);
+SANITIZER_INTERFACE_ATTRIBUTE
+void* __msan_memcpy(void *dst, const void *src, uptr size);
+SANITIZER_INTERFACE_ATTRIBUTE
+void* __msan_memset(void *s, int c, uptr n);
+SANITIZER_INTERFACE_ATTRIBUTE
+void* __msan_memmove(void* dest, const void* src, uptr n);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_poison(const void *a, uptr size);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_poison_stack(void *a, uptr size);
+
+// Copy size bytes from src to dst and unpoison the result.
+// Useful to implement unsafe loads.
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_load_unpoisoned(void *src, uptr size, void *dst);
+
+// Returns the offset of the first (at least partially) poisoned byte,
+// or -1 if the whole range is good.
+SANITIZER_INTERFACE_ATTRIBUTE
+sptr __msan_test_shadow(const void *x, uptr size);
+
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_check_mem_is_initialized(const void *x, uptr size);
+
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_set_origin(const void *a, uptr size, u32 origin);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_set_alloca_origin(void *a, uptr size, char *descr);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_set_alloca_origin4(void *a, uptr size, char *descr, uptr pc);
+SANITIZER_INTERFACE_ATTRIBUTE
+u32 __msan_chain_origin(u32 id);
+SANITIZER_INTERFACE_ATTRIBUTE
+u32 __msan_get_origin(const void *a);
+
+// Test that this_id is a descendant of prev_id (or they are simply equal).
+// "descendant" here means that are part of the same chain, created with
+// __msan_chain_origin.
+SANITIZER_INTERFACE_ATTRIBUTE
+int __msan_origin_is_descendant_or_same(u32 this_id, u32 prev_id);
+
+
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_clear_on_return();
+
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_set_keep_going(int keep_going);
+
+SANITIZER_INTERFACE_ATTRIBUTE
+int __msan_set_poison_in_malloc(int do_poison);
+
+SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
+/* OPTIONAL */ const char* __msan_default_options();
+
+// For testing.
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_set_expect_umr(int expect_umr);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_print_shadow(const void *x, uptr size);
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_dump_shadow(const void *x, uptr size);
+SANITIZER_INTERFACE_ATTRIBUTE
+int __msan_has_dynamic_component();
+
+// For testing.
+SANITIZER_INTERFACE_ATTRIBUTE
+u32 __msan_get_umr_origin();
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_partial_poison(const void* data, void* shadow, uptr size);
+
+// Tell MSan about newly allocated memory (ex.: custom allocator).
+// Memory will be marked uninitialized, with origin at the call site.
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_allocated_memory(const void* data, uptr size);
+
+// Tell MSan about newly destroyed memory. Memory will be marked
+// uninitialized.
+SANITIZER_INTERFACE_ATTRIBUTE
+void __sanitizer_dtor_callback(const void* data, uptr size);
+
+SANITIZER_INTERFACE_ATTRIBUTE
+u16 __sanitizer_unaligned_load16(const uu16 *p);
+
+SANITIZER_INTERFACE_ATTRIBUTE
+u32 __sanitizer_unaligned_load32(const uu32 *p);
+
+SANITIZER_INTERFACE_ATTRIBUTE
+u64 __sanitizer_unaligned_load64(const uu64 *p);
+
+SANITIZER_INTERFACE_ATTRIBUTE
+void __sanitizer_unaligned_store16(uu16 *p, u16 x);
+
+SANITIZER_INTERFACE_ATTRIBUTE
+void __sanitizer_unaligned_store32(uu32 *p, u32 x);
+
+SANITIZER_INTERFACE_ATTRIBUTE
+void __sanitizer_unaligned_store64(uu64 *p, u64 x);
+
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_set_death_callback(void (*callback)(void));
+
+SANITIZER_INTERFACE_ATTRIBUTE
+void __msan_copy_shadow(void *dst, const void *src, uptr size);
+} // extern "C"
+
+#endif // MSAN_INTERFACE_INTERNAL_H