[PATCH] D46457: [asan] Add a magic shadow value for shadw gap

[Walter Lee via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rCRT332557: [asan] Add a magic shadow value for shadw gap (authored by waltl, committed by ).
Herald added a subscriber: Sanitizers.

Changed prior to commit:
  https://reviews.llvm.org/D46457?vs=145473&id=147214#toc

Repository:
  rCRT Compiler Runtime

https://reviews.llvm.org/D46457

Files:
  lib/asan/asan_errors.cc
  lib/asan/asan_internal.h


Index: lib/asan/asan_errors.cc
===================================================================
--- lib/asan/asan_errors.cc
+++ lib/asan/asan_errors.cc
@@ -514,6 +514,7 @@
   PrintShadowByte(str, "  ASan internal:           ", kAsanInternalHeapMagic);
   PrintShadowByte(str, "  Left alloca redzone:     ", kAsanAllocaLeftMagic);
   PrintShadowByte(str, "  Right alloca redzone:    ", kAsanAllocaRightMagic);
+  PrintShadowByte(str, "  Shadow gap:              ", kAsanShadowGap);
 }
 
 static void PrintShadowBytes(InternalScopedString *str, const char *before,
Index: lib/asan/asan_internal.h
===================================================================
--- lib/asan/asan_internal.h
+++ lib/asan/asan_internal.h
@@ -147,6 +147,9 @@
 const int kAsanIntraObjectRedzone = 0xbb;
 const int kAsanAllocaLeftMagic = 0xca;
 const int kAsanAllocaRightMagic = 0xcb;
+// Used to populate the shadow gap for systems without memory
+// protection there (i.e. Myriad).
+const int kAsanShadowGap = 0xcc;
 
 static const uptr kCurrentStackFrameMagic = 0x41B58AB3;
 static const uptr kRetiredStackFrameMagic = 0x45E0360E;


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