diff --git a/debuggerd/Android.bp b/debuggerd/Android.bp
index fb274ec..7b6f6c0 100644
--- a/debuggerd/Android.bp
+++ b/debuggerd/Android.bp
@@ -238,6 +238,7 @@
         "gwp_asan_crash_handler",
         "libscudo",
         "libtombstone_proto",
+        "libprocinfo",
         "libprotobuf-cpp-lite",
     ],
 
diff --git a/debuggerd/libdebuggerd/tombstone_proto.cpp b/debuggerd/libdebuggerd/tombstone_proto.cpp
index 1ab93fe..3444e29 100644
--- a/debuggerd/libdebuggerd/tombstone_proto.cpp
+++ b/debuggerd/libdebuggerd/tombstone_proto.cpp
@@ -31,10 +31,12 @@
 #include <time.h>
 
 #include <memory>
+#include <optional>
 #include <string>
 
 #include <async_safe/log.h>
 
+#include <android-base/file.h>
 #include <android-base/properties.h>
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
@@ -47,6 +49,7 @@
 #include <log/logprint.h>
 #include <private/android_filesystem_config.h>
 
+#include <procinfo/process.h>
 #include <unwindstack/Maps.h>
 #include <unwindstack/Memory.h>
 #include <unwindstack/Regs.h>
@@ -519,6 +522,14 @@
   dump_log_file(tombstone, "main", pid);
 }
 
+static std::optional<uint64_t> read_uptime_secs() {
+  std::string uptime;
+  if (!android::base::ReadFileToString("/proc/uptime", &uptime)) {
+    return {};
+  }
+  return strtoll(uptime.c_str(), nullptr, 10);
+}
+
 void engrave_tombstone_proto(Tombstone* tombstone, unwindstack::Unwinder* unwinder,
                              const std::map<pid_t, ThreadInfo>& threads, pid_t target_thread,
                              const ProcessInfo& process_info, const OpenFilesList* open_files) {
@@ -529,6 +540,22 @@
   result.set_revision(android::base::GetProperty("ro.revision", "unknown"));
   result.set_timestamp(get_timestamp());
 
+  std::optional<uint64_t> system_uptime = read_uptime_secs();
+  if (system_uptime) {
+    android::procinfo::ProcessInfo proc_info;
+    std::string error;
+    if (android::procinfo::GetProcessInfo(target_thread, &proc_info, &error)) {
+      uint64_t starttime = proc_info.starttime / sysconf(_SC_CLK_TCK);
+      result.set_process_uptime(*system_uptime - starttime);
+    } else {
+      async_safe_format_log(ANDROID_LOG_ERROR, LOG_TAG, "failed to read process info: %s",
+                            error.c_str());
+    }
+  } else {
+    async_safe_format_log(ANDROID_LOG_ERROR, LOG_TAG, "failed to read /proc/uptime: %s",
+                          strerror(errno));
+  }
+
   const ThreadInfo& main_thread = threads.at(target_thread);
   result.set_pid(main_thread.pid);
   result.set_tid(main_thread.tid);
diff --git a/debuggerd/libdebuggerd/tombstone_proto_to_text.cpp b/debuggerd/libdebuggerd/tombstone_proto_to_text.cpp
index e4dd6df..00ca7c1 100644
--- a/debuggerd/libdebuggerd/tombstone_proto_to_text.cpp
+++ b/debuggerd/libdebuggerd/tombstone_proto_to_text.cpp
@@ -360,6 +360,7 @@
   CBL("Revision: '%s'", tombstone.revision().c_str());
   CBL("ABI: '%s'", abi_string(tombstone));
   CBL("Timestamp: %s", tombstone.timestamp().c_str());
+  CBL("Process uptime: %ds", tombstone.process_uptime());
 
   // Process header
   const auto& threads = tombstone.threads();
diff --git a/debuggerd/proto/tombstone.proto b/debuggerd/proto/tombstone.proto
index 433c406..dd15ff6 100644
--- a/debuggerd/proto/tombstone.proto
+++ b/debuggerd/proto/tombstone.proto
@@ -19,6 +19,9 @@
 
   string process_name = 9;
 
+  // Process uptime in seconds.
+  uint32 process_uptime = 20;
+
   Signal signal_info = 10;
   string abort_message = 14;
   repeated Cause causes = 15;
@@ -28,7 +31,7 @@
   repeated LogBuffer log_buffers = 18;
   repeated FD open_fds = 19;
 
-  reserved 20 to 999;
+  reserved 21 to 999;
 }
 
 enum Architecture {
diff --git a/fastboot/Android.bp b/fastboot/Android.bp
index 3c4269b..bf9ec90 100644
--- a/fastboot/Android.bp
+++ b/fastboot/Android.bp
@@ -127,6 +127,7 @@
         "-Wextra",
         "-Werror",
         "-Wvla",
+        "-DANDROID_BASE_UNIQUE_FD_DISABLE_IMPLICIT_CONVERSION",
     ],
     rtti: true,
 
@@ -206,6 +207,7 @@
         "-Wextra",
         "-Werror",
         "-Wunreachable-code",
+        "-DANDROID_BASE_UNIQUE_FD_DISABLE_IMPLICIT_CONVERSION",
     ],
 
     target: {
diff --git a/fastboot/device/commands.cpp b/fastboot/device/commands.cpp
index b72f3fe..0a72812 100644
--- a/fastboot/device/commands.cpp
+++ b/fastboot/device/commands.cpp
@@ -392,13 +392,13 @@
 
     struct sockaddr_un addr = {.sun_family = AF_UNIX};
     strncpy(addr.sun_path, "/dev/socket/recovery", sizeof(addr.sun_path) - 1);
-    if (connect(sock, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
+    if (connect(sock.get(), (struct sockaddr*)&addr, sizeof(addr)) < 0) {
         PLOG(ERROR) << "Couldn't connect to recovery";
         return false;
     }
     // Switch to recovery will not update the boot reason since it does not
     // require a reboot.
-    auto ret = write(sock, &msg_switch_to_recovery, sizeof(msg_switch_to_recovery));
+    auto ret = write(sock.get(), &msg_switch_to_recovery, sizeof(msg_switch_to_recovery));
     if (ret != sizeof(msg_switch_to_recovery)) {
         PLOG(ERROR) << "Couldn't write message to switch to recovery";
         return false;
diff --git a/fastboot/device/usb.cpp b/fastboot/device/usb.cpp
index 4bee7b2..4115a6d 100644
--- a/fastboot/device/usb.cpp
+++ b/fastboot/device/usb.cpp
@@ -82,7 +82,7 @@
     int orig_len = len;
     while (len > 0) {
         int write_len = std::min(USB_FFS_BULK_SIZE, len);
-        int n = write(h->bulk_in, buf, write_len);
+        int n = write(h->bulk_in.get(), buf, write_len);
         if (n < 0) {
             D("ERROR: fd = %d, n = %d: %s", h->bulk_in.get(), n, strerror(errno));
             return -1;
@@ -103,7 +103,7 @@
     unsigned count = 0;
     while (len > 0) {
         int read_len = std::min(USB_FFS_BULK_SIZE, len);
-        int n = read(h->bulk_out, buf, read_len);
+        int n = read(h->bulk_out.get(), buf, read_len);
         if (n < 0) {
             D("ERROR: fd = %d, n = %d: %s", h->bulk_out.get(), n, strerror(errno));
             return -1;
diff --git a/fastboot/fastboot.cpp b/fastboot/fastboot.cpp
index e1bf984..783cd19 100644
--- a/fastboot/fastboot.cpp
+++ b/fastboot/fastboot.cpp
@@ -230,9 +230,9 @@
     fprintf(stderr, "(bootloader) %s\n", info.c_str());
 }
 
-static int64_t get_file_size(int fd) {
+static int64_t get_file_size(borrowed_fd fd) {
     struct stat sb;
-    if (fstat(fd, &sb) == -1) {
+    if (fstat(fd.get(), &sb) == -1) {
         die("could not get file size");
     }
     return sb.st_size;
@@ -657,12 +657,12 @@
     fprintf(stderr, "extracting %s (%" PRIu64 " MB) to disk...", entry_name,
             zip_entry.uncompressed_length / 1024 / 1024);
     double start = now();
-    int error = ExtractEntryToFile(zip, &zip_entry, fd);
+    int error = ExtractEntryToFile(zip, &zip_entry, fd.get());
     if (error != 0) {
         die("\nfailed to extract '%s': %s", entry_name, ErrorCodeString(error));
     }
 
-    if (lseek(fd, 0, SEEK_SET) != 0) {
+    if (lseek(fd.get(), 0, SEEK_SET) != 0) {
         die("\nlseek on extracted file '%s' failed: %s", entry_name, strerror(errno));
     }
 
@@ -902,17 +902,18 @@
         return false;
     }
 
-    if (sparse_file* s = sparse_file_import(fd, false, false)) {
+    if (sparse_file* s = sparse_file_import(fd.get(), false, false)) {
         buf->image_size = sparse_file_len(s, false, false);
         sparse_file_destroy(s);
     } else {
         buf->image_size = sz;
     }
 
-    lseek(fd, 0, SEEK_SET);
+    lseek(fd.get(), 0, SEEK_SET);
     int64_t limit = get_sparse_limit(sz);
+    buf->fd = std::move(fd);
     if (limit) {
-        sparse_file** s = load_sparse_files(fd, limit);
+        sparse_file** s = load_sparse_files(buf->fd.get(), limit);
         if (s == nullptr) {
             return false;
         }
@@ -921,7 +922,6 @@
     } else {
         buf->type = FB_BUFFER_FD;
         buf->data = nullptr;
-        buf->fd = std::move(fd);
         buf->sz = sz;
     }
 
@@ -936,7 +936,7 @@
     }
 
     struct stat s;
-    if (fstat(fd, &s)) {
+    if (fstat(fd.get(), &s)) {
         return false;
     }
     if (!S_ISREG(s.st_mode)) {
@@ -995,7 +995,7 @@
         die("Failed writing to modified vbmeta");
     }
     buf->fd = std::move(fd);
-    lseek(buf->fd, 0, SEEK_SET);
+    lseek(buf->fd.get(), 0, SEEK_SET);
 }
 
 static bool has_vbmeta_partition() {
@@ -1057,13 +1057,13 @@
     if (!android::base::WriteStringToFd(data, fd)) {
         die("Failed writing to modified boot");
     }
-    lseek(fd, partition_size - AVB_FOOTER_SIZE, SEEK_SET);
+    lseek(fd.get(), partition_size - AVB_FOOTER_SIZE, SEEK_SET);
     if (!android::base::WriteStringToFd(data.substr(footer_offset), fd)) {
         die("Failed copying AVB footer in boot");
     }
     buf->fd = std::move(fd);
     buf->sz = partition_size;
-    lseek(buf->fd, 0, SEEK_SET);
+    lseek(buf->fd.get(), 0, SEEK_SET);
 }
 
 static void flash_buf(const std::string& partition, struct fastboot_buffer *buf)
@@ -1538,7 +1538,7 @@
 }
 
 void FlashAllTool::UpdateSuperPartition() {
-    int fd = source_.OpenFile("super_empty.img");
+    unique_fd fd = source_.OpenFile("super_empty.img");
     if (fd < 0) {
         return;
     }
@@ -2197,7 +2197,7 @@
             if (!load_buf(filename.c_str(), &buf) || buf.type != FB_BUFFER_FD) {
                 die("cannot load '%s'", filename.c_str());
             }
-            fb->Download(filename, buf.fd, buf.sz);
+            fb->Download(filename, buf.fd.get(), buf.sz);
         } else if (command == "get_staged") {
             std::string filename = next_arg(&args);
             fb->Upload(filename);
diff --git a/fastboot/fastboot_driver.cpp b/fastboot/fastboot_driver.cpp
index 14ee785..99a4873 100644
--- a/fastboot/fastboot_driver.cpp
+++ b/fastboot/fastboot_driver.cpp
@@ -144,7 +144,8 @@
     return Flash(partition);
 }
 
-RetCode FastBootDriver::FlashPartition(const std::string& partition, int fd, uint32_t size) {
+RetCode FastBootDriver::FlashPartition(const std::string& partition, android::base::borrowed_fd fd,
+                                       uint32_t size) {
     RetCode ret;
     if ((ret = Download(partition, fd, size))) {
         return ret;
@@ -182,15 +183,16 @@
     return SUCCESS;
 }
 
-RetCode FastBootDriver::Download(const std::string& name, int fd, size_t size,
-                                 std::string* response, std::vector<std::string>* info) {
+RetCode FastBootDriver::Download(const std::string& name, android::base::borrowed_fd fd,
+                                 size_t size, std::string* response,
+                                 std::vector<std::string>* info) {
     prolog_(StringPrintf("Sending '%s' (%zu KB)", name.c_str(), size / 1024));
     auto result = Download(fd, size, response, info);
     epilog_(result);
     return result;
 }
 
-RetCode FastBootDriver::Download(int fd, size_t size, std::string* response,
+RetCode FastBootDriver::Download(android::base::borrowed_fd fd, size_t size, std::string* response,
                                  std::vector<std::string>* info) {
     RetCode ret;
 
@@ -521,7 +523,7 @@
 }
 
 /******************************* PRIVATE **************************************/
-RetCode FastBootDriver::SendBuffer(int fd, size_t size) {
+RetCode FastBootDriver::SendBuffer(android::base::borrowed_fd fd, size_t size) {
     static constexpr uint32_t MAX_MAP_SIZE = 512 * 1024 * 1024;
     off64_t offset = 0;
     uint32_t remaining = size;
diff --git a/fastboot/fastboot_driver.h b/fastboot/fastboot_driver.h
index f1c094f..bccd668 100644
--- a/fastboot/fastboot_driver.h
+++ b/fastboot/fastboot_driver.h
@@ -77,9 +77,9 @@
     RetCode Continue(std::string* response = nullptr, std::vector<std::string>* info = nullptr);
     RetCode CreatePartition(const std::string& partition, const std::string& size);
     RetCode DeletePartition(const std::string& partition);
-    RetCode Download(const std::string& name, int fd, size_t size, std::string* response = nullptr,
-                     std::vector<std::string>* info = nullptr);
-    RetCode Download(int fd, size_t size, std::string* response = nullptr,
+    RetCode Download(const std::string& name, android::base::borrowed_fd fd, size_t size,
+                     std::string* response = nullptr, std::vector<std::string>* info = nullptr);
+    RetCode Download(android::base::borrowed_fd fd, size_t size, std::string* response = nullptr,
                      std::vector<std::string>* info = nullptr);
     RetCode Download(const std::string& name, const std::vector<char>& buf,
                      std::string* response = nullptr, std::vector<std::string>* info = nullptr);
@@ -113,7 +113,8 @@
 
     /* HIGHER LEVEL COMMANDS -- Composed of the commands above */
     RetCode FlashPartition(const std::string& partition, const std::vector<char>& data);
-    RetCode FlashPartition(const std::string& partition, int fd, uint32_t sz);
+    RetCode FlashPartition(const std::string& partition, android::base::borrowed_fd fd,
+                           uint32_t sz);
     RetCode FlashPartition(const std::string& partition, sparse_file* s, uint32_t sz,
                            size_t current, size_t total);
 
@@ -149,7 +150,7 @@
     Transport* transport_;
 
   private:
-    RetCode SendBuffer(int fd, size_t size);
+    RetCode SendBuffer(android::base::borrowed_fd fd, size_t size);
     RetCode SendBuffer(const std::vector<char>& buf);
     RetCode SendBuffer(const void* buf, size_t size);
 
diff --git a/fastboot/testdata/Android.bp b/fastboot/testdata/Android.bp
index 5debf5e..a490fe2 100644
--- a/fastboot/testdata/Android.bp
+++ b/fastboot/testdata/Android.bp
@@ -12,6 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
 python_binary_host {
     name: "fastboot_gen_rand",
     visibility: [":__subpackages__"],
diff --git a/fs_mgr/libfiemap/include/libfiemap/image_manager.h b/fs_mgr/libfiemap/include/libfiemap/image_manager.h
index 50f4f33..7e30509 100644
--- a/fs_mgr/libfiemap/include/libfiemap/image_manager.h
+++ b/fs_mgr/libfiemap/include/libfiemap/image_manager.h
@@ -198,7 +198,7 @@
 
     ~MappedDevice();
 
-    int fd() const { return fd_; }
+    int fd() const { return fd_.get(); }
     const std::string& path() const { return path_; }
 
   protected:
diff --git a/fs_mgr/libsnapshot/snapshotctl.cpp b/fs_mgr/libsnapshot/snapshotctl.cpp
index a44de84..5eb2003 100644
--- a/fs_mgr/libsnapshot/snapshotctl.cpp
+++ b/fs_mgr/libsnapshot/snapshotctl.cpp
@@ -48,6 +48,17 @@
     return SnapshotManager::New()->Dump(std::cout);
 }
 
+bool MapCmdHandler(int, char** argv) {
+    android::base::InitLogging(argv, &android::base::StderrLogger);
+    using namespace std::chrono_literals;
+    return SnapshotManager::New()->MapAllSnapshots(5000ms);
+}
+
+bool UnmapCmdHandler(int, char** argv) {
+    android::base::InitLogging(argv, &android::base::StderrLogger);
+    return SnapshotManager::New()->UnmapAllSnapshots();
+}
+
 bool MergeCmdHandler(int /*argc*/, char** argv) {
     android::base::InitLogging(argv, &android::base::StderrLogger);
     LOG(WARNING) << "Deprecated. Call update_engine_client --merge instead.";
@@ -58,6 +69,8 @@
         // clang-format off
         {"dump", DumpCmdHandler},
         {"merge", MergeCmdHandler},
+        {"map", MapCmdHandler},
+        {"unmap", UnmapCmdHandler},
         // clang-format on
 };