diff --git a/compiler-rt/lib/scudo/standalone/release.h b/compiler-rt/lib/scudo/standalone/release.h
--- a/compiler-rt/lib/scudo/standalone/release.h
+++ b/compiler-rt/lib/scudo/standalone/release.h
@@ -13,6 +13,7 @@
 #include "list.h"
 #include "mem_map.h"
 #include "mutex.h"
+#include "report.h"
 #include "thread_annotations.h"
 
 namespace scudo {
@@ -426,7 +427,8 @@
     if (PageMap.isAllocated())
       return true;
     PageMap.reset(NumberOfRegions, PagesCount, FullPagesBlockCountMax);
-    // TODO: Log some message when we fail on PageMap allocation.
+    if (!PageMap.isAllocated())
+        reportPageError(PageMap.getBufferSize());
     return PageMap.isAllocated();
   }
 
diff --git a/compiler-rt/lib/scudo/standalone/report.h b/compiler-rt/lib/scudo/standalone/report.h
--- a/compiler-rt/lib/scudo/standalone/report.h
+++ b/compiler-rt/lib/scudo/standalone/report.h
@@ -47,6 +47,7 @@
 void NORETURN reportDeallocTypeMismatch(AllocatorAction Action, void *Ptr,
                                         u8 TypeA, u8 TypeB);
 void NORETURN reportDeleteSizeMismatch(void *Ptr, uptr Size, uptr ExpectedSize);
+void NORETURN reportPageError(uptr Size);
 
 // C wrappers errors.
 void NORETURN reportAlignmentNotPowerOfTwo(uptr Alignment);
diff --git a/compiler-rt/lib/scudo/standalone/report.cpp b/compiler-rt/lib/scudo/standalone/report.cpp
--- a/compiler-rt/lib/scudo/standalone/report.cpp
+++ b/compiler-rt/lib/scudo/standalone/report.cpp
@@ -169,6 +169,12 @@
       Size, ExpectedSize);
 }
 
+void NORETURN reportPageError(uptr Size) {
+  ScopedErrorReport Report;
+  Report.append("PageMap allocation failed (BufferSize %lu)",
+                Size);
+}
+
 void NORETURN reportAlignmentNotPowerOfTwo(uptr Alignment) {
   ScopedErrorReport Report;
   Report.append(