diff --git a/debuggerd/Android.bp b/debuggerd/Android.bp
index 0cf3378..2e226da 100644
--- a/debuggerd/Android.bp
+++ b/debuggerd/Android.bp
@@ -183,6 +183,12 @@
             ],
         },
     },
+
+    product_variables: {
+        debuggable: {
+            cflags: ["-DROOT_POSSIBLE"],
+        },
+    },
 }
 
 cc_test {
diff --git a/debuggerd/libdebuggerd/backtrace.cpp b/debuggerd/libdebuggerd/backtrace.cpp
index 94fcfb2..c606970 100644
--- a/debuggerd/libdebuggerd/backtrace.cpp
+++ b/debuggerd/libdebuggerd/backtrace.cpp
@@ -74,10 +74,7 @@
     return;
   }
 
-  unwinder->SetDisplayBuildID(true);
-  for (size_t i = 0; i < unwinder->NumFrames(); i++) {
-    _LOG(&log, logtype::BACKTRACE, "  %s\n", unwinder->FormatFrame(i).c_str());
-  }
+  log_backtrace(&log, unwinder, "  ");
 }
 
 void dump_backtrace(android::base::unique_fd output_fd, unwindstack::Unwinder* unwinder,
diff --git a/debuggerd/libdebuggerd/include/libdebuggerd/utility.h b/debuggerd/libdebuggerd/include/libdebuggerd/utility.h
index 238c00c..f189c45 100644
--- a/debuggerd/libdebuggerd/include/libdebuggerd/utility.h
+++ b/debuggerd/libdebuggerd/include/libdebuggerd/utility.h
@@ -73,9 +73,12 @@
 void _LOG(log_t* log, logtype ltype, const char* fmt, ...) __attribute__((format(printf, 3, 4)));
 
 namespace unwindstack {
+class Unwinder;
 class Memory;
 }
 
+void log_backtrace(log_t* log, unwindstack::Unwinder* unwinder, const char* prefix);
+
 void dump_memory(log_t* log, unwindstack::Memory* backtrace, uint64_t addr, const std::string&);
 
 void read_with_default(const char* path, char* buf, size_t len, const char* default_value);
diff --git a/debuggerd/libdebuggerd/tombstone.cpp b/debuggerd/libdebuggerd/tombstone.cpp
index cc337ed..d1726cd 100644
--- a/debuggerd/libdebuggerd/tombstone.cpp
+++ b/debuggerd/libdebuggerd/tombstone.cpp
@@ -371,13 +371,6 @@
   }
 }
 
-void dump_backtrace(log_t* log, unwindstack::Unwinder* unwinder, const char* prefix) {
-  unwinder->SetDisplayBuildID(true);
-  for (size_t i = 0; i < unwinder->NumFrames(); i++) {
-    _LOG(log, logtype::BACKTRACE, "%s%s\n", prefix, unwinder->FormatFrame(i).c_str());
-  }
-}
-
 static void print_register_row(log_t* log,
                                const std::vector<std::pair<std::string, uint64_t>>& registers) {
   std::string output;
@@ -470,7 +463,7 @@
     _LOG(log, logtype::THREAD, "Failed to unwind");
   } else {
     _LOG(log, logtype::BACKTRACE, "\nbacktrace:\n");
-    dump_backtrace(log, unwinder, "    ");
+    log_backtrace(log, unwinder, "    ");
 
     _LOG(log, logtype::STACK, "\nstack:\n");
     dump_stack(log, unwinder->frames(), unwinder->GetMaps(), unwinder->GetProcessMemory().get());
diff --git a/debuggerd/libdebuggerd/utility.cpp b/debuggerd/libdebuggerd/utility.cpp
index 7aebea8..9b2779a 100644
--- a/debuggerd/libdebuggerd/utility.cpp
+++ b/debuggerd/libdebuggerd/utility.cpp
@@ -38,6 +38,7 @@
 #include <debuggerd/handler.h>
 #include <log/log.h>
 #include <unwindstack/Memory.h>
+#include <unwindstack/Unwinder.h>
 
 using android::base::unique_fd;
 
@@ -422,3 +423,22 @@
   // Then give up...
   return "?";
 }
+
+void log_backtrace(log_t* log, unwindstack::Unwinder* unwinder, const char* prefix) {
+  if (unwinder->elf_from_memory_not_file()) {
+    _LOG(log, logtype::BACKTRACE,
+         "%sNOTE: Function names and BuildId information is missing for some frames due\n", prefix);
+    _LOG(log, logtype::BACKTRACE,
+         "%sNOTE: to unreadable libraries. For unwinds of apps, only shared libraries\n", prefix);
+    _LOG(log, logtype::BACKTRACE, "%sNOTE: found under the lib/ directory are readable.\n", prefix);
+#if defined(ROOT_POSSIBLE)
+    _LOG(log, logtype::BACKTRACE,
+         "%sNOTE: On this device, run setenforce 0 to make the libraries readable.\n", prefix);
+#endif
+  }
+
+  unwinder->SetDisplayBuildID(true);
+  for (size_t i = 0; i < unwinder->NumFrames(); i++) {
+    _LOG(log, logtype::BACKTRACE, "%s%s\n", prefix, unwinder->FormatFrame(i).c_str());
+  }
+}