Make var more descriptive

Author: Camsyn

compiler-rt/lib/tsan/rtl/tsan_rtl_access.cpp

@@ -688,16 +688,17 @@ void MemoryAccessRangeT(ThreadState* thr, uptr pc, uptr addr, uptr size) {
     DCHECK(IsShadowMem(shadow_mem));
   }
 
-  uptr size1 =
+  uptr shadow_size =
       (RoundUpTo(addr + size, kShadowCell) - RoundDownTo(addr, kShadowCell));
-  RawShadow* shadow_mem_end = shadow_mem + size1 / kShadowCell * kShadowCnt;
+  RawShadow* shadow_mem_end =
+      shadow_mem + shadow_size / kShadowCell * kShadowCnt;
   if (!IsShadowMem(shadow_mem_end - 1)) {
     Printf("Bad shadow end addr: %p (%p)\n", shadow_mem_end - 1,
            (void*)(addr + size - 1));
     Printf(
-        "Shadow start addr (ok): %p (%p); size: 0x%zx; kShadowMultiplier: "
-        "%zx\n",
-        shadow_mem, (void*)addr, size, kShadowMultiplier);
+        "Shadow start addr (ok): %p (%p); size: 0x%zx; shadow_size: 0x%zx; "
+        "kShadowMultiplier: %zx\n",
+        shadow_mem, (void*)addr, size, shadow_size, kShadowMultiplier);
     DCHECK(IsShadowMem(shadow_mem_end - 1));
   }
 #endif