diff --git a/liblog/logd_reader.cpp b/liblog/logd_reader.cpp
index dcdff05..619cf8c 100644
--- a/liblog/logd_reader.cpp
+++ b/liblog/logd_reader.cpp
@@ -316,16 +316,11 @@
   return check_log_success(buf, send_log_msg(NULL, NULL, buf, len));
 }
 
-static void caught_signal(int signum __unused) {}
-
 static int logdOpen(struct android_log_logger_list* logger_list,
                     struct android_log_transport_context* transp) {
   struct android_log_logger* logger;
-  struct sigaction ignore;
-  struct sigaction old_sigaction;
-  unsigned int old_alarm = 0;
   char buffer[256], *cp, c;
-  int e, ret, remaining, sock;
+  int ret, remaining, sock;
 
   if (!logger_list) {
     return -EINVAL;
@@ -387,29 +382,13 @@
     cp += ret;
   }
 
-  if (logger_list->mode & ANDROID_LOG_NONBLOCK) {
-    /* Deal with an unresponsive logd */
-    memset(&ignore, 0, sizeof(ignore));
-    ignore.sa_handler = caught_signal;
-    sigemptyset(&ignore.sa_mask);
-    /* particularily useful if tombstone is reporting for logd */
-    sigaction(SIGALRM, &ignore, &old_sigaction);
-    old_alarm = alarm(30);
-  }
-  ret = write(sock, buffer, cp - buffer);
-  e = errno;
-  if (logger_list->mode & ANDROID_LOG_NONBLOCK) {
-    if (e == EINTR) {
-      e = ETIMEDOUT;
-    }
-    alarm(old_alarm);
-    sigaction(SIGALRM, &old_sigaction, NULL);
-  }
+  ret = TEMP_FAILURE_RETRY(write(sock, buffer, cp - buffer));
+  int write_errno = errno;
 
   if (ret <= 0) {
     close(sock);
-    if ((ret == -1) && e) {
-      return -e;
+    if (ret == -1) {
+      return -write_errno;
     }
     if (ret == 0) {
       return -EIO;
@@ -427,52 +406,21 @@
 /* Read from the selected logs */
 static int logdRead(struct android_log_logger_list* logger_list,
                     struct android_log_transport_context* transp, struct log_msg* log_msg) {
-  int ret, e;
-  struct sigaction ignore;
-  struct sigaction old_sigaction;
-  unsigned int old_alarm = 0;
-
-  ret = logdOpen(logger_list, transp);
+  int ret = logdOpen(logger_list, transp);
   if (ret < 0) {
     return ret;
   }
 
   memset(log_msg, 0, sizeof(*log_msg));
 
-  unsigned int new_alarm = 0;
-  if (logger_list->mode & ANDROID_LOG_NONBLOCK) {
-    if ((logger_list->mode & ANDROID_LOG_WRAP) &&
-        (logger_list->start.tv_sec || logger_list->start.tv_nsec)) {
-      /* b/64143705 */
-      new_alarm = (ANDROID_LOG_WRAP_DEFAULT_TIMEOUT * 11) / 10 + 10;
-      logger_list->mode &= ~ANDROID_LOG_WRAP;
-    } else {
-      new_alarm = 30;
-    }
-
-    memset(&ignore, 0, sizeof(ignore));
-    ignore.sa_handler = caught_signal;
-    sigemptyset(&ignore.sa_mask);
-    /* particularily useful if tombstone is reporting for logd */
-    sigaction(SIGALRM, &ignore, &old_sigaction);
-    old_alarm = alarm(new_alarm);
-  }
-
   /* NOTE: SOCK_SEQPACKET guarantees we read exactly one full entry */
-  ret = recv(ret, log_msg, LOGGER_ENTRY_MAX_LEN, 0);
-  e = errno;
-
-  if (new_alarm) {
-    if ((ret == 0) || (e == EINTR)) {
-      e = EAGAIN;
-      ret = -1;
-    }
-    alarm(old_alarm);
-    sigaction(SIGALRM, &old_sigaction, NULL);
+  ret = TEMP_FAILURE_RETRY(recv(ret, log_msg, LOGGER_ENTRY_MAX_LEN, 0));
+  if ((logger_list->mode & ANDROID_LOG_NONBLOCK) && ret == 0) {
+    return -EAGAIN;
   }
 
-  if ((ret == -1) && e) {
-    return -e;
+  if (ret == -1) {
+    return -errno;
   }
   return ret;
 }
diff --git a/liblog/tests/log_wrap_test.cpp b/liblog/tests/log_wrap_test.cpp
index c7dd8e8..e06964f 100644
--- a/liblog/tests/log_wrap_test.cpp
+++ b/liblog/tests/log_wrap_test.cpp
@@ -58,60 +58,27 @@
 
   android_logger_list_close(logger_list);
 }
-
-static void caught_signal(int /* signum */) {
-}
 #endif
 
 // b/64143705 confirm fixed
 TEST(liblog, wrap_mode_blocks) {
 #ifdef __ANDROID__
+  // The read call is expected to take up to 2 hours in the happy case.  There was a previous bug
+  // where it would take only 30 seconds due to an alarm() in logd_reader.cpp.  That alarm has been
+  // removed, so we check here that the read call blocks for a reasonable amount of time (5s).
+
+  struct sigaction ignore = {.sa_handler = [](int) { _exit(0); }};
+  struct sigaction old_sigaction;
+  sigaction(SIGALRM, &ignore, &old_sigaction);
+  alarm(5);
 
   android::base::Timer timer;
+  read_with_wrap();
 
-  // The read call is expected to take up to 2 hours in the happy case.
-  // We only want to make sure it waits for longer than 30s, but we can't
-  // use an alarm as the implementation uses it. So we run the test in
-  // a separate process.
-  pid_t pid = fork();
-
-  if (pid == 0) {
-    // child
-    read_with_wrap();
-    _exit(0);
-  }
-
-  struct sigaction ignore, old_sigaction;
-  memset(&ignore, 0, sizeof(ignore));
-  ignore.sa_handler = caught_signal;
-  sigemptyset(&ignore.sa_mask);
-  sigaction(SIGALRM, &ignore, &old_sigaction);
-  alarm(45);
-
-  bool killed = false;
-  for (;;) {
-    siginfo_t info = {};
-    // This wait will succeed if the child exits, or fail with EINTR if the
-    // alarm goes off first - a loose approximation to a timed wait.
-    int ret = waitid(P_PID, pid, &info, WEXITED);
-    if (ret >= 0 || errno != EINTR) {
-      EXPECT_EQ(ret, 0);
-      if (!killed) {
-        EXPECT_EQ(info.si_status, 0);
-      }
-      break;
-    }
-    unsigned int alarm_left = alarm(0);
-    if (alarm_left > 0) {
-      alarm(alarm_left);
-    } else {
-      kill(pid, SIGTERM);
-      killed = true;
-    }
-  }
+  FAIL() << "read_with_wrap() should not return before the alarm is triggered.";
 
   alarm(0);
-  EXPECT_GT(timer.duration(), std::chrono::seconds(40));
+  sigaction(SIGALRM, &old_sigaction, nullptr);
 #else
   GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
diff --git a/libnativebridge/Android.bp b/libnativebridge/Android.bp
index 10d42e4..c97845d 100644
--- a/libnativebridge/Android.bp
+++ b/libnativebridge/Android.bp
@@ -21,6 +21,8 @@
 cc_library {
     name: "libnativebridge",
     defaults: ["libnativebridge-defaults"],
+    // TODO(oth): remove after moving under art/ (b/137364733)
+    visibility: ["//visibility:public"],
 
     host_supported: true,
     srcs: ["native_bridge.cc"],
@@ -52,6 +54,8 @@
 cc_library {
     name: "libnativebridge_lazy",
     defaults: ["libnativebridge-defaults"],
+    // TODO(oth): remove after moving under art/ (b/137364733)
+    visibility: ["//visibility:public"],
 
     host_supported: false,
     srcs: ["native_bridge_lazy.cc"],
diff --git a/libnativeloader/Android.bp b/libnativeloader/Android.bp
index 939bdd7..2ee9d28 100644
--- a/libnativeloader/Android.bp
+++ b/libnativeloader/Android.bp
@@ -16,6 +16,8 @@
 cc_library {
     name: "libnativeloader",
     defaults: ["libnativeloader-defaults"],
+    // TODO(oth): remove after moving under art/ (b/137364733)
+    visibility: ["//visibility:public"],
     host_supported: true,
     srcs: [
         "native_loader.cpp",
@@ -52,6 +54,8 @@
 cc_library {
     name: "libnativeloader_lazy",
     defaults: ["libnativeloader-defaults"],
+    // TODO(oth): remove after moving under art/ (b/137364733)
+    visibility: ["//visibility:public"],
     host_supported: false,
     srcs: ["native_loader_lazy.cpp"],
     required: ["libnativeloader"],
@@ -59,6 +63,8 @@
 
 cc_library_headers {
     name: "libnativeloader-headers",
+    // TODO(oth): remove after moving under art/ (b/137364733)
+    visibility: ["//visibility:public"],
     host_supported: true,
     export_include_dirs: ["include"],
 }
@@ -83,6 +89,9 @@
         "libnativebridge-headers",
         "libnativeloader-headers",
     ],
-    system_shared_libs: ["libc", "libm"],
+    system_shared_libs: [
+        "libc",
+        "libm",
+    ],
     test_suites: ["device-tests"],
 }
diff --git a/libunwindstack/DexFile.cpp b/libunwindstack/DexFile.cpp
index eaf867f..dff7a8b 100644
--- a/libunwindstack/DexFile.cpp
+++ b/libunwindstack/DexFile.cpp
@@ -22,6 +22,9 @@
 
 #include <memory>
 
+#define LOG_TAG "unwind"
+#include <log/log.h>
+
 #include <android-base/unique_fd.h>
 #include <art_api/dex_file_support.h>
 
@@ -32,6 +35,19 @@
 
 namespace unwindstack {
 
+static bool CheckDexSupport() {
+  if (std::string err_msg; !art_api::dex::TryLoadLibdexfileExternal(&err_msg)) {
+    ALOGW("Failed to initialize DEX file support: %s", err_msg.c_str());
+    return false;
+  }
+  return true;
+}
+
+static bool HasDexSupport() {
+  static bool has_dex_support = CheckDexSupport();
+  return has_dex_support;
+}
+
 std::unique_ptr<DexFile> DexFile::Create(uint64_t dex_file_offset_in_memory, Memory* memory,
                                          MapInfo* info) {
   if (!info->name.empty()) {
@@ -57,6 +73,10 @@
 
 std::unique_ptr<DexFileFromFile> DexFileFromFile::Create(uint64_t dex_file_offset_in_file,
                                                          const std::string& file) {
+  if (UNLIKELY(!HasDexSupport())) {
+    return nullptr;
+  }
+
   android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(file.c_str(), O_RDONLY | O_CLOEXEC)));
   if (fd == -1) {
     return nullptr;
@@ -75,6 +95,10 @@
 std::unique_ptr<DexFileFromMemory> DexFileFromMemory::Create(uint64_t dex_file_offset_in_memory,
                                                              Memory* memory,
                                                              const std::string& name) {
+  if (UNLIKELY(!HasDexSupport())) {
+    return nullptr;
+  }
+
   std::vector<uint8_t> backing_memory;
 
   for (size_t size = 0;;) {