commit 983c3db55166a8bc75f628d1bf04ab9b861a4874
author Vitaly Buka <vitalybuka@google.com> Mon May 24 13:12:47 2021 -0700
committer Copybara-Service <copybara-worker@google.com> Tue May 25 19:11:47 2021 -0700
tree d99f5d0710ee0bdb2d0c3b6e5ccb59553bed684c
parent 36c9204c9ed2a332a67f268218aa14f0f600f594

[NFC][scudo] Add paramenters DCHECKs

Reviewed By: hctim

Differential Revision: https://reviews.llvm.org/D103042

GitOrigin-RevId: a0169b2ed198154117e82bf24ae7238454c2e9a2

memtag.h

diff --git a/memtag.h b/memtag.h
index ec4b698..5c3ea58 100644
--- a/memtag.h
+++ b/memtag.h
@@ -146,10 +146,13 @@
   return TaggedPtr;
 }
 
-inline uptr addFixedTag(uptr Ptr, uptr Tag) { return Ptr | (Tag << 56); }
+inline uptr addFixedTag(uptr Ptr, uptr Tag) {
+  DCHECK_LT(Tag, 16);
+  return Ptr | (Tag << 56);
+}
 
 inline uptr storeTags(uptr Begin, uptr End) {
-  DCHECK(Begin % 16 == 0);
+  DCHECK_EQ(0, Begin % 16);
   uptr LineSize, Next, Tmp;
   __asm__ __volatile__(
       R"(
@@ -209,10 +212,12 @@
         [Tmp] "=&r"(Tmp)
       : [End] "r"(End)
       : "memory");
+  DCHECK_EQ(0, Begin % 16);
   return Begin;
 }
 
 inline void storeTag(uptr Ptr) {
+  DCHECK_EQ(0, Ptr % 16);
   __asm__ __volatile__(R"(
     .arch_extension memtag
     stg %0, [%0]
@@ -223,6 +228,7 @@
 }
 
 inline uptr loadTag(uptr Ptr) {
+  DCHECK_EQ(0, Ptr % 16);
   uptr TaggedPtr = Ptr;
   __asm__ __volatile__(
       R"(