1 files changed, 2 insertions, 35 deletions
diff --git a/lib/asan/asan_linux.cc b/lib/asan/asan_linux.cc
index 8ce4b96c2..a949a9888 100644
--- a/lib/asan/asan_linux.cc
+++ b/lib/asan/asan_linux.cc
@@ -17,7 +17,6 @@
 
 #include "asan_interceptors.h"
 #include "asan_internal.h"
-#include "asan_premap_shadow.h"
 #include "asan_thread.h"
 #include "sanitizer_common/sanitizer_flags.h"
 #include "sanitizer_common/sanitizer_freebsd.h"
@@ -82,41 +81,9 @@ void *AsanDoesNotSupportStaticLinkage() {
   return &_DYNAMIC;  // defined in link.h
 }
 
-#if ASAN_PREMAP_SHADOW
-uptr FindPremappedShadowStart() {
-  uptr granularity = GetMmapGranularity();
-  uptr shadow_start = reinterpret_cast<uptr>(&__asan_shadow);
-  uptr shadow_size = PremapShadowSize();
-  UnmapOrDie((void *)(shadow_start - granularity), shadow_size + granularity);
-  // MmapNoAccess does not touch TotalMmap, but UnmapOrDie decreases it.
-  // Compensate.
-  IncreaseTotalMmap(shadow_size + granularity);
-  return shadow_start;
-}
-#endif
-
 uptr FindDynamicShadowStart() {
-#if ASAN_PREMAP_SHADOW
-  if (!PremapShadowFailed())
-    return FindPremappedShadowStart();
-#endif
-
-  uptr granularity = GetMmapGranularity();
-  uptr alignment = granularity * 8;
-  uptr left_padding = granularity;
-  uptr shadow_size = kHighShadowEnd + left_padding;
-  uptr map_size = shadow_size + alignment;
-
-  uptr map_start = (uptr)MmapNoAccess(map_size);
-  CHECK_NE(map_start, ~(uptr)0);
-
-  uptr shadow_start = RoundUpTo(map_start, alignment);
-  UnmapOrDie((void *)map_start, map_size);
-  // MmapNoAccess does not touch TotalMmap, but UnmapOrDie decreases it.
-  // Compensate.
-  IncreaseTotalMmap(map_size);
-
-  return shadow_start;
+  UNREACHABLE("FindDynamicShadowStart is not available");
+  return 0;
 }
 
 void AsanApplyToGlobals(globals_op_fptr op, const void *needle) {