commit db3d3378ba751337c12147d11367006f23becc0c
author Vitaly Buka <vitalybuka@google.com> Thu Jul 11 17:39:15 2024 -0700
committer Vitaly Buka <vitalybuka@google.com> Thu Jul 11 17:55:54 2024 -0700
tree f907daa3e7915c96bbbcfe3e4af87b70c6fcfd41
parent ce2b28055330b37e67ece18bd42d13beb537955d

[NFC][hwasan] Print after protecting gaps

PrintAddressSpaceLayout can accidentally
mmap into the gap.

compiler-rt/lib/hwasan/hwasan_linux.cpp

diff --git a/compiler-rt/lib/hwasan/hwasan_linux.cpp b/compiler-rt/lib/hwasan/hwasan_linux.cpp
index ae14906..0a23ffc 100644
--- a/compiler-rt/lib/hwasan/hwasan_linux.cpp
+++ b/compiler-rt/lib/hwasan/hwasan_linux.cpp
@@ -251,9 +251,6 @@
   CHECK_GT(kLowShadowEnd, kLowShadowStart);
   CHECK_GT(kLowShadowStart, kLowMemEnd);
 
-  if (Verbosity())
-    PrintAddressSpaceLayout();
-
   // Reserve shadow memory.
   ReserveShadowMemoryRange(kLowShadowStart, kLowShadowEnd, "low shadow");
   ReserveShadowMemoryRange(kHighShadowStart, kHighShadowEnd, "high shadow");
@@ -267,6 +264,9 @@
   if (kHighShadowEnd + 1 < kHighMemStart)
     ProtectGap(kHighShadowEnd + 1, kHighMemStart - kHighShadowEnd - 1);
 
+  if (Verbosity())
+    PrintAddressSpaceLayout();
+
   return true;
 }