diff --git a/init/init.cpp b/init/init.cpp
index b6ba6a8..920b926 100644
--- a/init/init.cpp
+++ b/init/init.cpp
@@ -100,6 +100,8 @@
 using android::base::boot_clock;
 using android::base::ConsumePrefix;
 using android::base::GetProperty;
+using android::base::GetIntProperty;
+using android::base::GetBoolProperty;
 using android::base::ReadFileToString;
 using android::base::SetProperty;
 using android::base::StringPrintf;
@@ -108,6 +110,8 @@
 using android::base::unique_fd;
 using android::fs_mgr::AvbHandle;
 using android::snapshot::SnapshotManager;
+using android::base::WaitForProperty;
+using android::base::WriteStringToFile;
 
 namespace android {
 namespace init {
@@ -919,6 +923,34 @@
     return {};
 }
 
+static void SecondStageBootMonitor(int timeout_sec) {
+    auto cur_time = boot_clock::now().time_since_epoch();
+    int cur_sec = std::chrono::duration_cast<std::chrono::seconds>(cur_time).count();
+    int extra_sec = timeout_sec <= cur_sec? 0 : timeout_sec - cur_sec;
+    auto boot_timeout = std::chrono::seconds(extra_sec);
+
+    LOG(INFO) << "Started BootMonitorThread, expiring in "
+              << timeout_sec
+              << " seconds from boot-up";
+
+    if (!WaitForProperty("sys.boot_completed", "1", boot_timeout)) {
+        LOG(ERROR) << "BootMonitorThread: boot didn't complete in "
+                   << timeout_sec
+                   << " seconds. Trigger a panic!";
+
+        // add a short delay for logs to be flushed out.
+        std::this_thread::sleep_for(200ms);
+
+        // trigger a kernel panic
+        WriteStringToFile("c", PROC_SYSRQ);
+    }
+}
+
+static void StartSecondStageBootMonitor(int timeout_sec) {
+    std::thread monitor_thread(&SecondStageBootMonitor, timeout_sec);
+    monitor_thread.detach();
+}
+
 int SecondStageMain(int argc, char** argv) {
     if (REBOOT_BOOTLOADER_ON_PANIC) {
         InstallRebootSignalHandlers();
@@ -1010,6 +1042,14 @@
     InstallInitNotifier(&epoll);
     StartPropertyService(&property_fd);
 
+    // If boot_timeout property has been set in a debug build, start the boot monitor
+    if (GetBoolProperty("ro.debuggable", false)) {
+        int timeout = GetIntProperty("ro.boot.boot_timeout", 0);
+        if (timeout > 0) {
+            StartSecondStageBootMonitor(timeout);
+        }
+    }
+
     // Make the time that init stages started available for bootstat to log.
     RecordStageBoottimes(start_time);