diff --git a/debuggerd/crasher/crasher.cpp b/debuggerd/crasher/crasher.cpp
index 6970201..f57349b 100644
--- a/debuggerd/crasher/crasher.cpp
+++ b/debuggerd/crasher/crasher.cpp
@@ -134,6 +134,14 @@
     free(buf); // GCC is smart enough to warn about this, but we're doing it deliberately.
 }
 
+noinline void leak() {
+    while (true) {
+        void* mapping =
+            mmap(nullptr, PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+        static_cast<volatile char*>(mapping)[0] = 'a';
+    }
+}
+
 noinline void sigsegv_non_null() {
     int* a = (int *)(&do_action);
     *a = 42;
@@ -160,8 +168,8 @@
     fprintf(stderr, "  stack-overflow        recurse until the stack overflows\n");
     fprintf(stderr, "  nostack               crash with a NULL stack pointer\n");
     fprintf(stderr, "\n");
-    fprintf(stderr, "  heap-corruption       cause a libc abort by corrupting the heap\n");
     fprintf(stderr, "  heap-usage            cause a libc abort by abusing a heap function\n");
+    fprintf(stderr, "  leak                  leak memory until we get OOM-killed\n");
     fprintf(stderr, "\n");
     fprintf(stderr, "  abort                 call abort()\n");
     fprintf(stderr, "  assert                call assert() without a function\n");
@@ -265,6 +273,8 @@
         return pthread_join(0, nullptr);
     } else if (!strcasecmp(arg, "heap-usage")) {
         abuse_heap();
+    } else if (!strcasecmp(arg, "leak")) {
+        leak();
     } else if (!strcasecmp(arg, "SIGSEGV-unmapped")) {
         char* map = reinterpret_cast<char*>(mmap(nullptr, sizeof(int), PROT_READ | PROT_WRITE,
                                                  MAP_SHARED | MAP_ANONYMOUS, -1, 0));
diff --git a/fs_mgr/fs_mgr.cpp b/fs_mgr/fs_mgr.cpp
index cc81074..ff9b84f 100644
--- a/fs_mgr/fs_mgr.cpp
+++ b/fs_mgr/fs_mgr.cpp
@@ -79,13 +79,15 @@
     FS_STAT_E2FSCK_F_ALWAYS = 0x0004,
     FS_STAT_UNCLEAN_SHUTDOWN = 0x0008,
     FS_STAT_QUOTA_ENABLED = 0x0010,
-    FS_STAT_TUNE2FS_FAILED = 0x0020,
     FS_STAT_RO_MOUNT_FAILED = 0x0040,
     FS_STAT_RO_UNMOUNT_FAILED = 0x0080,
     FS_STAT_FULL_MOUNT_FAILED = 0x0100,
     FS_STAT_E2FSCK_FAILED = 0x0200,
     FS_STAT_E2FSCK_FS_FIXED = 0x0400,
     FS_STAT_EXT4_INVALID_MAGIC = 0x0800,
+    FS_STAT_TOGGLE_QUOTAS_FAILED = 0x10000,
+    FS_STAT_SET_RESERVED_BLOCKS_FAILED = 0x20000,
+    FS_STAT_ENABLE_ENCRYPTION_FAILED = 0x40000,
 };
 
 // TODO: switch to inotify()
@@ -117,10 +119,16 @@
     }
 }
 
+static bool is_extfs(const std::string& fs_type) {
+    return fs_type == "ext4" || fs_type == "ext3" || fs_type == "ext2";
+}
+
 static bool should_force_check(int fs_stat) {
-    return fs_stat & (FS_STAT_E2FSCK_F_ALWAYS | FS_STAT_UNCLEAN_SHUTDOWN | FS_STAT_QUOTA_ENABLED |
-                      FS_STAT_TUNE2FS_FAILED | FS_STAT_RO_MOUNT_FAILED | FS_STAT_RO_UNMOUNT_FAILED |
-                      FS_STAT_FULL_MOUNT_FAILED | FS_STAT_E2FSCK_FAILED);
+    return fs_stat &
+           (FS_STAT_E2FSCK_F_ALWAYS | FS_STAT_UNCLEAN_SHUTDOWN | FS_STAT_QUOTA_ENABLED |
+            FS_STAT_RO_MOUNT_FAILED | FS_STAT_RO_UNMOUNT_FAILED | FS_STAT_FULL_MOUNT_FAILED |
+            FS_STAT_E2FSCK_FAILED | FS_STAT_TOGGLE_QUOTAS_FAILED |
+            FS_STAT_SET_RESERVED_BLOCKS_FAILED | FS_STAT_ENABLE_ENCRYPTION_FAILED);
 }
 
 static void check_fs(const char *blk_device, char *fs_type, char *target, int *fs_stat)
@@ -133,7 +141,7 @@
     const char* e2fsck_forced_argv[] = {E2FSCK_BIN, "-f", "-y", blk_device};
 
     /* Check for the types of filesystems we know how to check */
-    if (!strcmp(fs_type, "ext2") || !strcmp(fs_type, "ext3") || !strcmp(fs_type, "ext4")) {
+    if (is_extfs(fs_type)) {
         if (*fs_stat & FS_STAT_EXT4_INVALID_MAGIC) {  // will fail, so do not try
             return;
         }
@@ -231,186 +239,208 @@
     return;
 }
 
-/* Function to read the primary superblock */
-static int read_super_block(int fd, struct ext4_super_block *sb)
-{
-    off64_t ret;
-
-    ret = lseek64(fd, 1024, SEEK_SET);
-    if (ret < 0)
-        return ret;
-
-    ret = read(fd, sb, sizeof(*sb));
-    if (ret < 0)
-        return ret;
-    if (ret != sizeof(*sb))
-        return ret;
-
-    return 0;
-}
-
-static ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es)
-{
+static ext4_fsblk_t ext4_blocks_count(const struct ext4_super_block* es) {
     return ((ext4_fsblk_t)le32_to_cpu(es->s_blocks_count_hi) << 32) |
-            le32_to_cpu(es->s_blocks_count_lo);
+           le32_to_cpu(es->s_blocks_count_lo);
 }
 
-static ext4_fsblk_t ext4_r_blocks_count(struct ext4_super_block *es)
-{
+static ext4_fsblk_t ext4_r_blocks_count(const struct ext4_super_block* es) {
     return ((ext4_fsblk_t)le32_to_cpu(es->s_r_blocks_count_hi) << 32) |
-            le32_to_cpu(es->s_r_blocks_count_lo);
+           le32_to_cpu(es->s_r_blocks_count_lo);
 }
 
-static int do_quota_with_shutdown_check(char *blk_device, char *fs_type,
-                                        struct fstab_rec *rec, int *fs_stat)
-{
-    int force_check = 0;
-    if (!strcmp(fs_type, "ext4")) {
-        /*
-         * Some system images do not have tune2fs for licensing reasons
-         * Detect these and skip reserve blocks.
-         */
-        if (access(TUNE2FS_BIN, X_OK)) {
-            LERROR << "Not running " << TUNE2FS_BIN << " on "
-                   << blk_device << " (executable not in system image)";
-        } else {
-            const char* arg1 = nullptr;
-            const char* arg2 = nullptr;
-            int status = 0;
-            int ret = 0;
-            android::base::unique_fd fd(
-                TEMP_FAILURE_RETRY(open(blk_device, O_RDONLY | O_CLOEXEC)));
-            if (fd >= 0) {
-                struct ext4_super_block sb;
-                ret = read_super_block(fd, &sb);
-                if (ret < 0) {
-                    PERROR << "Can't read '" << blk_device << "' super block";
-                    return force_check;
-                }
-                if (sb.s_magic != EXT4_SUPER_MAGIC) {
-                    LINFO << "Invalid ext4 magic:0x" << std::hex << sb.s_magic << "," << blk_device;
-                    *fs_stat |= FS_STAT_EXT4_INVALID_MAGIC;
-                    return 0;  // not a valid fs, tune2fs, fsck, and mount  will all fail.
-                }
-                *fs_stat |= FS_STAT_IS_EXT4;
-                LINFO << "superblock s_max_mnt_count:" << sb.s_max_mnt_count << "," << blk_device;
-                if (sb.s_max_mnt_count == 0xffff) {  // -1 (int16) in ext2, but uint16 in ext4
-                    *fs_stat |= FS_STAT_NEW_IMAGE_VERSION;
-                }
-                if ((sb.s_feature_incompat & EXT4_FEATURE_INCOMPAT_RECOVER) != 0 ||
-                    (sb.s_state & EXT4_VALID_FS) == 0) {
-                    LINFO << __FUNCTION__ << "(): was not clealy shutdown, state flag:"
-                          << std::hex << sb.s_state
-                          << "incompat flag:" << std::hex << sb.s_feature_incompat;
-                    force_check = 1;
-                    *fs_stat |= FS_STAT_UNCLEAN_SHUTDOWN;
-                }
-                int has_quota = (sb.s_feature_ro_compat
-                        & cpu_to_le32(EXT4_FEATURE_RO_COMPAT_QUOTA)) != 0;
-                int want_quota = fs_mgr_is_quota(rec) != 0;
+// Read the primary superblock from an ext4 filesystem.  On failure return
+// false.  If it's not an ext4 filesystem, also set FS_STAT_EXT4_INVALID_MAGIC.
+static bool read_ext4_superblock(const char* blk_device, struct ext4_super_block* sb, int* fs_stat) {
+    android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(blk_device, O_RDONLY | O_CLOEXEC)));
 
-                if (has_quota == want_quota) {
-                    LINFO << "Requested quota status is match on " << blk_device;
-                    return force_check;
-                } else if (want_quota) {
-                    LINFO << "Enabling quota on " << blk_device;
-                    arg1 = "-Oquota";
-                    arg2 = "-Qusrquota,grpquota";
-                    force_check = 1;
-                    *fs_stat |= FS_STAT_QUOTA_ENABLED;
-                } else {
-                    LINFO << "Disabling quota on " << blk_device;
-                    arg1 = "-Q^usrquota,^grpquota";
-                    arg2 = "-O^quota";
-                }
-            } else {
-                PERROR << "Failed to open '" << blk_device << "'";
-                return force_check;
-            }
-
-            const char *tune2fs_argv[] = {
-                TUNE2FS_BIN,
-                arg1,
-                arg2,
-                blk_device,
-            };
-            ret = android_fork_execvp_ext(ARRAY_SIZE(tune2fs_argv),
-                                          const_cast<char **>(tune2fs_argv),
-                                          &status, true, LOG_KLOG | LOG_FILE,
-                                          true, NULL, NULL, 0);
-            if (ret < 0) {
-                /* No need to check for error in fork, we can't really handle it now */
-                LERROR << "Failed trying to run " << TUNE2FS_BIN;
-                *fs_stat |= FS_STAT_TUNE2FS_FAILED;
-            }
-        }
+    if (fd < 0) {
+        PERROR << "Failed to open '" << blk_device << "'";
+        return false;
     }
-    return force_check;
+
+    if (pread(fd, sb, sizeof(*sb), 1024) != sizeof(*sb)) {
+        PERROR << "Can't read '" << blk_device << "' superblock";
+        return false;
+    }
+
+    if (sb->s_magic != EXT4_SUPER_MAGIC) {
+        LINFO << "Invalid ext4 magic:0x" << std::hex << sb->s_magic << " "
+              << "on '" << blk_device << "'";
+        // not a valid fs, tune2fs, fsck, and mount  will all fail.
+        *fs_stat |= FS_STAT_EXT4_INVALID_MAGIC;
+        return false;
+    }
+    *fs_stat |= FS_STAT_IS_EXT4;
+    LINFO << "superblock s_max_mnt_count:" << sb->s_max_mnt_count << "," << blk_device;
+    if (sb->s_max_mnt_count == 0xffff) {  // -1 (int16) in ext2, but uint16 in ext4
+        *fs_stat |= FS_STAT_NEW_IMAGE_VERSION;
+    }
+    return true;
 }
 
-static void do_reserved_size(char *blk_device, char *fs_type, struct fstab_rec *rec, int *fs_stat)
-{
-    /* Check for the types of filesystems we know how to check */
-    if (!strcmp(fs_type, "ext2") || !strcmp(fs_type, "ext3") || !strcmp(fs_type, "ext4")) {
-        /*
-         * Some system images do not have tune2fs for licensing reasons
-         * Detect these and skip reserve blocks.
-         */
-        if (access(TUNE2FS_BIN, X_OK)) {
-            LERROR << "Not running " << TUNE2FS_BIN << " on "
-                   << blk_device << " (executable not in system image)";
+// Some system images do not have tune2fs for licensing reasons.
+// Detect these and skip running it.
+static bool tune2fs_available(void) {
+    return access(TUNE2FS_BIN, X_OK) == 0;
+}
+
+static bool run_tune2fs(const char* argv[], int argc) {
+    int ret;
+
+    ret = android_fork_execvp_ext(argc, const_cast<char**>(argv), nullptr, true,
+                                  LOG_KLOG | LOG_FILE, true, nullptr, nullptr, 0);
+    return ret == 0;
+}
+
+// Enable/disable quota support on the filesystem if needed.
+static void tune_quota(const char* blk_device, const struct fstab_rec* rec,
+                       const struct ext4_super_block* sb, int* fs_stat) {
+    bool has_quota = (sb->s_feature_ro_compat & cpu_to_le32(EXT4_FEATURE_RO_COMPAT_QUOTA)) != 0;
+    bool want_quota = fs_mgr_is_quota(rec) != 0;
+
+    if (has_quota == want_quota) {
+        return;
+    }
+
+    if (!tune2fs_available()) {
+        LERROR << "Unable to " << (want_quota ? "enable" : "disable") << " quotas on " << blk_device
+               << " because " TUNE2FS_BIN " is missing";
+        return;
+    }
+
+    const char* argv[] = {TUNE2FS_BIN, nullptr, nullptr, blk_device};
+
+    if (want_quota) {
+        LINFO << "Enabling quotas on " << blk_device;
+        argv[1] = "-Oquota";
+        argv[2] = "-Qusrquota,grpquota";
+        *fs_stat |= FS_STAT_QUOTA_ENABLED;
+    } else {
+        LINFO << "Disabling quotas on " << blk_device;
+        argv[1] = "-O^quota";
+        argv[2] = "-Q^usrquota,^grpquota";
+    }
+
+    if (!run_tune2fs(argv, ARRAY_SIZE(argv))) {
+        LERROR << "Failed to run " TUNE2FS_BIN " to " << (want_quota ? "enable" : "disable")
+               << " quotas on " << blk_device;
+        *fs_stat |= FS_STAT_TOGGLE_QUOTAS_FAILED;
+    }
+}
+
+// Set the number of reserved filesystem blocks if needed.
+static void tune_reserved_size(const char* blk_device, const struct fstab_rec* rec,
+                               const struct ext4_super_block* sb, int* fs_stat) {
+    if (!(rec->fs_mgr_flags & MF_RESERVEDSIZE)) {
+        return;
+    }
+
+    // The size to reserve is given in the fstab, but we won't reserve more
+    // than 2% of the filesystem.
+    const uint64_t max_reserved_blocks = ext4_blocks_count(sb) * 0.02;
+    uint64_t reserved_blocks = rec->reserved_size / EXT4_BLOCK_SIZE(sb);
+
+    if (reserved_blocks > max_reserved_blocks) {
+        LWARNING << "Reserved blocks " << reserved_blocks << " is too large; "
+                 << "capping to " << max_reserved_blocks;
+        reserved_blocks = max_reserved_blocks;
+    }
+
+    if (ext4_r_blocks_count(sb) == reserved_blocks) {
+        return;
+    }
+
+    if (!tune2fs_available()) {
+        LERROR << "Unable to set the number of reserved blocks on " << blk_device
+               << " because " TUNE2FS_BIN " is missing";
+        return;
+    }
+
+    char buf[32];
+    const char* argv[] = {TUNE2FS_BIN, "-r", buf, blk_device};
+
+    snprintf(buf, sizeof(buf), "%" PRIu64, reserved_blocks);
+    LINFO << "Setting reserved block count on " << blk_device << " to " << reserved_blocks;
+    if (!run_tune2fs(argv, ARRAY_SIZE(argv))) {
+        LERROR << "Failed to run " TUNE2FS_BIN " to set the number of reserved blocks on "
+               << blk_device;
+        *fs_stat |= FS_STAT_SET_RESERVED_BLOCKS_FAILED;
+    }
+}
+
+// Enable file-based encryption if needed.
+static void tune_encrypt(const char* blk_device, const struct fstab_rec* rec,
+                         const struct ext4_super_block* sb, int* fs_stat) {
+    bool has_encrypt = (sb->s_feature_incompat & cpu_to_le32(EXT4_FEATURE_INCOMPAT_ENCRYPT)) != 0;
+    bool want_encrypt = fs_mgr_is_file_encrypted(rec) != 0;
+
+    if (has_encrypt || !want_encrypt) {
+        return;
+    }
+
+    if (!tune2fs_available()) {
+        LERROR << "Unable to enable ext4 encryption on " << blk_device
+               << " because " TUNE2FS_BIN " is missing";
+        return;
+    }
+
+    const char* argv[] = {TUNE2FS_BIN, "-Oencrypt", blk_device};
+
+    LINFO << "Enabling ext4 encryption on " << blk_device;
+    if (!run_tune2fs(argv, ARRAY_SIZE(argv))) {
+        LERROR << "Failed to run " TUNE2FS_BIN " to enable "
+               << "ext4 encryption on " << blk_device;
+        *fs_stat |= FS_STAT_ENABLE_ENCRYPTION_FAILED;
+    }
+}
+
+//
+// Prepare the filesystem on the given block device to be mounted.
+//
+// If the "check" option was given in the fstab record, or it seems that the
+// filesystem was uncleanly shut down, we'll run fsck on the filesystem.
+//
+// If needed, we'll also enable (or disable) filesystem features as specified by
+// the fstab record.
+//
+static int prepare_fs_for_mount(const char* blk_device, const struct fstab_rec* rec) {
+    int fs_stat = 0;
+
+    if (is_extfs(rec->fs_type)) {
+        struct ext4_super_block sb;
+
+        if (read_ext4_superblock(blk_device, &sb, &fs_stat)) {
+            if ((sb.s_feature_incompat & EXT4_FEATURE_INCOMPAT_RECOVER) != 0 ||
+                (sb.s_state & EXT4_VALID_FS) == 0) {
+                LINFO << "Filesystem on " << blk_device << " was not cleanly shutdown; "
+                      << "state flags: 0x" << std::hex << sb.s_state << ", "
+                      << "incompat feature flags: 0x" << std::hex << sb.s_feature_incompat;
+                fs_stat |= FS_STAT_UNCLEAN_SHUTDOWN;
+            }
+
+            // Note: quotas should be enabled before running fsck.
+            tune_quota(blk_device, rec, &sb, &fs_stat);
         } else {
-            LINFO << "Running " << TUNE2FS_BIN << " on " << blk_device;
-
-            int status = 0;
-            int ret = 0;
-            unsigned long reserved_blocks = 0;
-            android::base::unique_fd fd(
-                TEMP_FAILURE_RETRY(open(blk_device, O_RDONLY | O_CLOEXEC)));
-            if (fd >= 0) {
-                struct ext4_super_block sb;
-                ret = read_super_block(fd, &sb);
-                if (ret < 0) {
-                    PERROR << "Can't read '" << blk_device << "' super block";
-                    return;
-                }
-                reserved_blocks = rec->reserved_size / EXT4_BLOCK_SIZE(&sb);
-                unsigned long reserved_threshold = ext4_blocks_count(&sb) * 0.02;
-                if (reserved_threshold < reserved_blocks) {
-                    LWARNING << "Reserved blocks " << reserved_blocks
-                             << " is too large";
-                    reserved_blocks = reserved_threshold;
-                }
-
-                if (ext4_r_blocks_count(&sb) == reserved_blocks) {
-                    LINFO << "Have reserved same blocks";
-                    return;
-                }
-            } else {
-                PERROR << "Failed to open '" << blk_device << "'";
-                return;
-            }
-
-            char buf[16] = {0};
-            snprintf(buf, sizeof (buf), "-r %lu", reserved_blocks);
-            const char *tune2fs_argv[] = {
-                TUNE2FS_BIN,
-                buf,
-                blk_device,
-            };
-
-            ret = android_fork_execvp_ext(ARRAY_SIZE(tune2fs_argv),
-                                          const_cast<char **>(tune2fs_argv),
-                                          &status, true, LOG_KLOG | LOG_FILE,
-                                          true, NULL, NULL, 0);
-
-            if (ret < 0) {
-                /* No need to check for error in fork, we can't really handle it now */
-                LERROR << "Failed trying to run " << TUNE2FS_BIN;
-                *fs_stat |= FS_STAT_TUNE2FS_FAILED;
-            }
+            return fs_stat;
         }
     }
+
+    if ((rec->fs_mgr_flags & MF_CHECK) ||
+        (fs_stat & (FS_STAT_UNCLEAN_SHUTDOWN | FS_STAT_QUOTA_ENABLED))) {
+        check_fs(blk_device, rec->fs_type, rec->mount_point, &fs_stat);
+    }
+
+    if (is_extfs(rec->fs_type) && (rec->fs_mgr_flags & (MF_RESERVEDSIZE | MF_FILEENCRYPTION))) {
+        struct ext4_super_block sb;
+
+        if (read_ext4_superblock(blk_device, &sb, &fs_stat)) {
+            tune_reserved_size(blk_device, rec, &sb, &fs_stat);
+            tune_encrypt(blk_device, rec, &sb, &fs_stat);
+        }
+    }
+
+    return fs_stat;
 }
 
 static void remove_trailing_slashes(char *n)
@@ -559,10 +589,7 @@
                 continue;
             }
 
-            int fs_stat = 0;
-            int force_check = do_quota_with_shutdown_check(fstab->recs[i].blk_device,
-                                                           fstab->recs[i].fs_type,
-                                                           &fstab->recs[i], &fs_stat);
+            int fs_stat = prepare_fs_for_mount(fstab->recs[i].blk_device, &fstab->recs[i]);
             if (fs_stat & FS_STAT_EXT4_INVALID_MAGIC) {
                 LERROR << __FUNCTION__ << "(): skipping mount, invalid ext4, mountpoint="
                        << fstab->recs[i].mount_point << " rec[" << i
@@ -570,15 +597,6 @@
                 mount_errno = EINVAL;  // continue bootup for FDE
                 continue;
             }
-            if ((fstab->recs[i].fs_mgr_flags & MF_CHECK) || force_check) {
-                check_fs(fstab->recs[i].blk_device, fstab->recs[i].fs_type,
-                         fstab->recs[i].mount_point, &fs_stat);
-            }
-
-            if (fstab->recs[i].fs_mgr_flags & MF_RESERVEDSIZE) {
-                do_reserved_size(fstab->recs[i].blk_device, fstab->recs[i].fs_type,
-                                 &fstab->recs[i], &fs_stat);
-            }
 
             int retry_count = 2;
             while (retry_count-- > 0) {
@@ -804,9 +822,7 @@
         }
 
         /* Translate LABEL= file system labels into block devices */
-        if (!strcmp(fstab->recs[i].fs_type, "ext2") ||
-            !strcmp(fstab->recs[i].fs_type, "ext3") ||
-            !strcmp(fstab->recs[i].fs_type, "ext4")) {
+        if (is_extfs(fstab->recs[i].fs_type)) {
             int tret = translate_ext_labels(&fstab->recs[i]);
             if (tret < 0) {
                 LERROR << "Could not translate label to block device";
@@ -1025,18 +1041,7 @@
             continue;
         }
 
-        int fs_stat = 0;
-        int force_check = do_quota_with_shutdown_check(n_blk_device, fstab->recs[i].fs_type,
-                                                       &fstab->recs[i], &fs_stat);
-
-        if ((fstab->recs[i].fs_mgr_flags & MF_CHECK) || force_check) {
-            check_fs(n_blk_device, fstab->recs[i].fs_type,
-                     fstab->recs[i].mount_point, &fs_stat);
-        }
-
-        if (fstab->recs[i].fs_mgr_flags & MF_RESERVEDSIZE) {
-            do_reserved_size(n_blk_device, fstab->recs[i].fs_type, &fstab->recs[i], &fs_stat);
-        }
+        int fs_stat = prepare_fs_for_mount(n_blk_device, &fstab->recs[i]);
 
         if (fstab->recs[i].fs_mgr_flags & MF_AVB) {
             if (!avb_handle) {
diff --git a/fs_mgr/fs_mgr_boot_config.cpp b/fs_mgr/fs_mgr_boot_config.cpp
index ab5beed..9117667 100644
--- a/fs_mgr/fs_mgr_boot_config.cpp
+++ b/fs_mgr/fs_mgr_boot_config.cpp
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#include <string>
+
 #include <android-base/file.h>
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
@@ -51,9 +53,11 @@
     // lastly, check the device tree
     if (is_dt_compatible()) {
         std::string file_name = kAndroidDtDir + "/" + key;
-        // DT entries terminate with '\0' but so do the properties
         if (android::base::ReadFileToString(file_name, out_val)) {
-            return true;
+            if (!out_val->empty()) {
+                out_val->pop_back();  // Trims the trailing '\0' out.
+                return true;
+            }
         }
     }
 
diff --git a/fs_mgr/fs_mgr_fstab.cpp b/fs_mgr/fs_mgr_fstab.cpp
index 7a41b14..b68875b 100644
--- a/fs_mgr/fs_mgr_fstab.cpp
+++ b/fs_mgr/fs_mgr_fstab.cpp
@@ -810,32 +810,26 @@
     return fstab->fs_mgr_flags & MF_NOEMULATEDSD;
 }
 
-int fs_mgr_is_notrim(struct fstab_rec *fstab)
-{
+int fs_mgr_is_notrim(const struct fstab_rec* fstab) {
     return fstab->fs_mgr_flags & MF_NOTRIM;
 }
 
-int fs_mgr_is_formattable(struct fstab_rec *fstab)
-{
+int fs_mgr_is_formattable(const struct fstab_rec* fstab) {
     return fstab->fs_mgr_flags & (MF_FORMATTABLE);
 }
 
-int fs_mgr_is_slotselect(struct fstab_rec *fstab)
-{
+int fs_mgr_is_slotselect(const struct fstab_rec* fstab) {
     return fstab->fs_mgr_flags & MF_SLOTSELECT;
 }
 
-int fs_mgr_is_nofail(struct fstab_rec *fstab)
-{
+int fs_mgr_is_nofail(const struct fstab_rec* fstab) {
     return fstab->fs_mgr_flags & MF_NOFAIL;
 }
 
-int fs_mgr_is_latemount(struct fstab_rec *fstab)
-{
+int fs_mgr_is_latemount(const struct fstab_rec* fstab) {
     return fstab->fs_mgr_flags & MF_LATEMOUNT;
 }
 
-int fs_mgr_is_quota(struct fstab_rec *fstab)
-{
+int fs_mgr_is_quota(const struct fstab_rec* fstab) {
     return fstab->fs_mgr_flags & MF_QUOTA;
 }
diff --git a/fs_mgr/include_fstab/fstab/fstab.h b/fs_mgr/include_fstab/fstab/fstab.h
index 3ea4e03..17e1fb1 100644
--- a/fs_mgr/include_fstab/fstab/fstab.h
+++ b/fs_mgr/include_fstab/fstab/fstab.h
@@ -80,12 +80,12 @@
 const char* fs_mgr_get_file_encryption_mode(const struct fstab_rec* fstab);
 int fs_mgr_is_convertible_to_fbe(const struct fstab_rec* fstab);
 int fs_mgr_is_noemulatedsd(const struct fstab_rec* fstab);
-int fs_mgr_is_notrim(struct fstab_rec* fstab);
-int fs_mgr_is_formattable(struct fstab_rec* fstab);
-int fs_mgr_is_slotselect(struct fstab_rec* fstab);
-int fs_mgr_is_nofail(struct fstab_rec* fstab);
-int fs_mgr_is_latemount(struct fstab_rec* fstab);
-int fs_mgr_is_quota(struct fstab_rec* fstab);
+int fs_mgr_is_notrim(const struct fstab_rec* fstab);
+int fs_mgr_is_formattable(const struct fstab_rec* fstab);
+int fs_mgr_is_slotselect(const struct fstab_rec* fstab);
+int fs_mgr_is_nofail(const struct fstab_rec* fstab);
+int fs_mgr_is_latemount(const struct fstab_rec* fstab);
+int fs_mgr_is_quota(const struct fstab_rec* fstab);
 
 __END_DECLS
 
diff --git a/libmemunreachable/Android.bp b/libmemunreachable/Android.bp
index cdac76b..826a576 100644
--- a/libmemunreachable/Android.bp
+++ b/libmemunreachable/Android.bp
@@ -26,6 +26,7 @@
     defaults: ["libmemunreachable_defaults"],
     srcs: [
         "Allocator.cpp",
+        "Binder.cpp",
         "HeapWalker.cpp",
         "LeakFolding.cpp",
         "LeakPipe.cpp",
@@ -84,3 +85,18 @@
         },
     },
 }
+
+cc_test {
+    name: "memunreachable_binder_test",
+    defaults: ["libmemunreachable_defaults"],
+    srcs: [
+        "tests/Binder_test.cpp",
+        "tests/MemUnreachable_test.cpp",
+    ],
+    shared_libs: [
+        "libbinder",
+        "libhwbinder",
+        "libmemunreachable",
+        "libutils",
+    ],
+}
diff --git a/libmemunreachable/Binder.cpp b/libmemunreachable/Binder.cpp
new file mode 100644
index 0000000..60512a3
--- /dev/null
+++ b/libmemunreachable/Binder.cpp
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <sys/cdefs.h>
+#include <unistd.h>
+
+#include <functional>
+
+#include "Binder.h"
+#include "log.h"
+
+__BEGIN_DECLS
+
+// Weak undefined references to the symbols in libbinder and libhwbinder
+// so that libmemunreachable can call them in processes that have them
+// loaded without requiring libmemunreachable to have dependencies on them.
+ssize_t __attribute__((weak)) getBinderKernelReferences(size_t, uintptr_t*);
+ssize_t __attribute__((weak)) getHWBinderKernelReferences(size_t, uintptr_t*);
+
+__END_DECLS
+
+namespace android {
+
+static bool BinderReferencesToVector(allocator::vector<uintptr_t>& refs,
+                                     std::function<ssize_t(size_t, uintptr_t*)> fn) {
+  if (fn == nullptr) {
+    return true;
+  }
+
+  size_t size = refs.size();
+
+  do {
+    refs.resize(size);
+
+    ssize_t ret = fn(refs.size(), refs.data());
+    if (ret < 0) {
+      return false;
+    }
+
+    size = ret;
+  } while (size > refs.size());
+
+  refs.resize(size);
+  return true;
+}
+
+bool BinderReferences(allocator::vector<uintptr_t>& refs) {
+  refs.clear();
+
+  allocator::vector<uintptr_t> binder_refs{refs.get_allocator()};
+  if (BinderReferencesToVector(refs, getBinderKernelReferences)) {
+    refs.insert(refs.end(), binder_refs.begin(), binder_refs.end());
+  } else {
+    MEM_ALOGE("getBinderKernelReferences failed");
+  }
+
+  allocator::vector<uintptr_t> hwbinder_refs{refs.get_allocator()};
+  if (BinderReferencesToVector(hwbinder_refs, getHWBinderKernelReferences)) {
+    refs.insert(refs.end(), hwbinder_refs.begin(), hwbinder_refs.end());
+  } else {
+    MEM_ALOGE("getHWBinderKernelReferences failed");
+  }
+
+  return true;
+}
+
+}  // namespace android
diff --git a/libunwindstack/Log.h b/libmemunreachable/Binder.h
similarity index 65%
copy from libunwindstack/Log.h
copy to libmemunreachable/Binder.h
index 2d01aa8..bf4fd3e 100644
--- a/libunwindstack/Log.h
+++ b/libmemunreachable/Binder.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2016 The Android Open Source Project
+ * Copyright (C) 2017 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -14,12 +14,15 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_LOG_H
-#define _LIBUNWINDSTACK_LOG_H
+#ifndef LIBMEMUNREACHABLE_BINDER_H_
+#define LIBMEMUNREACHABLE_BINDER_H_
 
-#include <stdint.h>
+#include "Allocator.h"
 
-void log_to_stdout(bool enable);
-void log(uint8_t indent, const char* format, ...);
+namespace android {
 
-#endif  // _LIBUNWINDSTACK_LOG_H
+bool BinderReferences(allocator::vector<uintptr_t>& refs);
+
+}  // namespace android
+
+#endif  // LIBMEMUNREACHABLE_BINDER_H_
diff --git a/libmemunreachable/MemUnreachable.cpp b/libmemunreachable/MemUnreachable.cpp
index a1f74c3..5e062fd 100644
--- a/libmemunreachable/MemUnreachable.cpp
+++ b/libmemunreachable/MemUnreachable.cpp
@@ -28,6 +28,7 @@
 #include <backtrace.h>
 
 #include "Allocator.h"
+#include "Binder.h"
 #include "HeapWalker.h"
 #include "Leak.h"
 #include "LeakFolding.h"
@@ -53,7 +54,8 @@
   MemUnreachable(pid_t pid, Allocator<void> allocator)
       : pid_(pid), allocator_(allocator), heap_walker_(allocator_) {}
   bool CollectAllocations(const allocator::vector<ThreadInfo>& threads,
-                          const allocator::vector<Mapping>& mappings);
+                          const allocator::vector<Mapping>& mappings,
+                          const allocator::vector<uintptr_t>& refs);
   bool GetUnreachableMemory(allocator::vector<Leak>& leaks, size_t limit, size_t* num_leaks,
                             size_t* leak_bytes);
   size_t Allocations() { return heap_walker_.Allocations(); }
@@ -82,7 +84,8 @@
 }
 
 bool MemUnreachable::CollectAllocations(const allocator::vector<ThreadInfo>& threads,
-                                        const allocator::vector<Mapping>& mappings) {
+                                        const allocator::vector<Mapping>& mappings,
+                                        const allocator::vector<uintptr_t>& refs) {
   MEM_ALOGI("searching process %d for allocations", pid_);
   allocator::vector<Mapping> heap_mappings{mappings};
   allocator::vector<Mapping> anon_mappings{mappings};
@@ -118,6 +121,8 @@
     heap_walker_.Root(thread_it->regs);
   }
 
+  heap_walker_.Root(refs);
+
   MEM_ALOGI("searching done");
 
   return true;
@@ -282,6 +287,7 @@
     ThreadCapture thread_capture(parent_pid, heap);
     allocator::vector<ThreadInfo> thread_info(heap);
     allocator::vector<Mapping> mappings(heap);
+    allocator::vector<uintptr_t> refs(heap);
 
     // ptrace all the threads
     if (!thread_capture.CaptureThreads()) {
@@ -301,6 +307,11 @@
       return 1;
     }
 
+    if (!BinderReferences(refs)) {
+      continue_parent_sem.Post();
+      return 1;
+    }
+
     // malloc must be enabled to call fork, at_fork handlers take the same
     // locks as ScopedDisableMalloc.  All threads are paused in ptrace, so
     // memory state is still consistent.  Unfreeze the original thread so it
@@ -326,7 +337,7 @@
 
       MemUnreachable unreachable{parent_pid, heap};
 
-      if (!unreachable.CollectAllocations(thread_info, mappings)) {
+      if (!unreachable.CollectAllocations(thread_info, mappings, refs)) {
         _exit(2);
       }
       size_t num_allocations = unreachable.Allocations();
diff --git a/libmemunreachable/tests/Binder_test.cpp b/libmemunreachable/tests/Binder_test.cpp
new file mode 100644
index 0000000..6e85d5a
--- /dev/null
+++ b/libmemunreachable/tests/Binder_test.cpp
@@ -0,0 +1,156 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <signal.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <binder/Binder.h>
+#include <binder/IBinder.h>
+#include <binder/IServiceManager.h>
+#include <binder/Parcel.h>
+#include <binder/ProcessState.h>
+
+#include <gtest/gtest.h>
+
+#include "Allocator.h"
+#include "Binder.h"
+
+namespace android {
+
+static const String16 service_name("test.libmemunreachable_binder");
+
+class BinderService : public BBinder {
+ public:
+  BinderService() = default;
+  virtual ~BinderService() = default;
+
+  virtual status_t onTransact(uint32_t /*code*/, const Parcel& data, Parcel* reply,
+                              uint32_t /*flags*/ = 0) {
+    reply->writeStrongBinder(ref);
+    ref = data.readStrongBinder();
+    return 0;
+  }
+
+ private:
+  sp<IBinder> ref;
+};
+
+class BinderObject : public BBinder {
+ public:
+  BinderObject() = default;
+  ~BinderObject() = default;
+};
+
+class ServiceProcess {
+ public:
+  ServiceProcess() : child_(0) {}
+  ~ServiceProcess() { Stop(); }
+
+  bool Run() {
+    pid_t ret = fork();
+    if (ret < 0) {
+      return false;
+    } else if (ret == 0) {
+      // child
+      _exit(Service());
+    } else {
+      // parent
+      child_ = ret;
+      return true;
+    }
+  }
+
+  bool Stop() {
+    if (child_ > 0) {
+      if (kill(child_, SIGTERM)) {
+        return false;
+      }
+      int status = 0;
+      if (TEMP_FAILURE_RETRY(waitpid(child_, &status, 0)) != child_) {
+        return false;
+      }
+      child_ = 0;
+      return WIFEXITED(status) && WEXITSTATUS(status) == 0;
+    }
+
+    return true;
+  }
+
+  int Service() {
+    sp<ProcessState> proc{ProcessState::self()};
+    sp<IServiceManager> sm = defaultServiceManager();
+    if (sm == nullptr) {
+      fprintf(stderr, "Failed to get service manager\n");
+      return 1;
+    }
+    if (sm->addService(service_name, new BinderService()) != OK) {
+      fprintf(stderr, "Failed to add test service\n");
+      return 1;
+    }
+    proc->startThreadPool();
+    pause();
+    return 0;
+  }
+
+ private:
+  pid_t child_;
+};
+
+class BinderTest : public ::testing::Test {
+ protected:
+  ServiceProcess service_process_;
+};
+
+TEST_F(BinderTest, binder) {
+  ServiceProcess service_process;
+  ASSERT_TRUE(service_process.Run());
+
+  sp<IServiceManager> sm = defaultServiceManager();
+  ASSERT_TRUE(sm != nullptr);
+
+  // A small sleep allows the service to start, which
+  // prevents a longer sleep in getService.
+  usleep(100000);
+
+  sp<IBinder> service = sm->getService(service_name);
+  ASSERT_TRUE(service != nullptr);
+
+  sp<IBinder> binder{new BinderObject()};
+
+  Parcel send;
+  Parcel reply;
+
+  send.writeStrongBinder(binder);
+  status_t rv = service->transact(0, send, &reply);
+  ASSERT_EQ(static_cast<status_t>(OK), rv);
+
+  Heap heap;
+  allocator::vector<uintptr_t> refs{heap};
+
+  ASSERT_TRUE(BinderReferences(refs));
+
+  bool found_ref = false;
+  for (auto ref : refs) {
+    if (ref == reinterpret_cast<uintptr_t>(binder.get())) {
+      found_ref = true;
+    }
+  }
+
+  ASSERT_TRUE(found_ref);
+}
+
+}  // namespace android
diff --git a/libunwindstack/Android.bp b/libunwindstack/Android.bp
index a6044c8..94f0f8e 100644
--- a/libunwindstack/Android.bp
+++ b/libunwindstack/Android.bp
@@ -44,6 +44,7 @@
 cc_library {
     name: "libunwindstack",
     defaults: ["libunwindstack_flags"],
+    export_include_dirs: ["include"],
 
     srcs: [
         "ArmExidx.cpp",
@@ -150,10 +151,10 @@
 }
 
 //-------------------------------------------------------------------------
-// Utility Executables
+// Tools
 //-------------------------------------------------------------------------
 cc_defaults {
-    name: "libunwindstack_executables",
+    name: "libunwindstack_tools",
     defaults: ["libunwindstack_flags"],
 
     shared_libs: [
@@ -161,18 +162,40 @@
         "libbase",
         "liblzma",
     ],
+}
 
-    static_libs: [
-        "liblog",
+cc_binary {
+    name: "unwind",
+    defaults: ["libunwindstack_tools"],
+
+    srcs: [
+        "tools/unwind.cpp",
     ],
+
+    target: {
+        linux: {
+            host_ldlibs: [
+                "-lrt",
+            ],
+        },
+    },
 }
 
 cc_binary {
     name: "unwind_info",
-    defaults: ["libunwindstack_executables"],
+    defaults: ["libunwindstack_tools"],
 
     srcs: [
-        "unwind_info.cpp",
+        "tools/unwind_info.cpp",
+    ],
+}
+
+cc_binary {
+    name: "unwind_symbols",
+    defaults: ["libunwindstack_tools"],
+
+    srcs: [
+        "tools/unwind_symbols.cpp",
     ],
 }
 
diff --git a/libunwindstack/ArmExidx.cpp b/libunwindstack/ArmExidx.cpp
index 5c7caca..fed3e0e 100644
--- a/libunwindstack/ArmExidx.cpp
+++ b/libunwindstack/ArmExidx.cpp
@@ -21,12 +21,15 @@
 
 #include <android-base/stringprintf.h>
 
+#include <unwindstack/Log.h>
+#include <unwindstack/Memory.h>
+#include <unwindstack/Regs.h>
+
 #include "ArmExidx.h"
 #include "Check.h"
-#include "Log.h"
 #include "Machine.h"
-#include "Memory.h"
-#include "Regs.h"
+
+namespace unwindstack {
 
 void ArmExidx::LogRawData() {
   std::string log_str("Raw Data:");
@@ -684,3 +687,5 @@
   while (Decode());
   return status_ == ARM_STATUS_FINISH;
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/ArmExidx.h b/libunwindstack/ArmExidx.h
index 8c7f15a..f4361d4 100644
--- a/libunwindstack/ArmExidx.h
+++ b/libunwindstack/ArmExidx.h
@@ -21,6 +21,8 @@
 
 #include <deque>
 
+namespace unwindstack {
+
 // Forward declarations.
 class Memory;
 class RegsArm;
@@ -105,4 +107,6 @@
   bool pc_set_ = false;
 };
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_ARM_EXIDX_H
diff --git a/libunwindstack/Check.h b/libunwindstack/Check.h
index e0c48c7..2d216d7 100644
--- a/libunwindstack/Check.h
+++ b/libunwindstack/Check.h
@@ -19,7 +19,9 @@
 
 #include <stdlib.h>
 
-#include "Log.h"
+#include <unwindstack/Log.h>
+
+namespace unwindstack {
 
 #define CHECK(assertion)                                   \
   if (__builtin_expect(!(assertion), false)) {             \
@@ -27,4 +29,6 @@
     abort();                                               \
   }
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_ERROR_H
diff --git a/libunwindstack/DwarfCfa.cpp b/libunwindstack/DwarfCfa.cpp
index 006f039..b1d55ba 100644
--- a/libunwindstack/DwarfCfa.cpp
+++ b/libunwindstack/DwarfCfa.cpp
@@ -23,12 +23,15 @@
 
 #include <android-base/stringprintf.h>
 
+#include <unwindstack/DwarfLocation.h>
+#include <unwindstack/Log.h>
+
 #include "DwarfCfa.h"
 #include "DwarfEncoding.h"
-#include "DwarfMemory.h"
+#include "DwarfError.h"
 #include "DwarfOp.h"
-#include "DwarfStructs.h"
-#include "Log.h"
+
+namespace unwindstack {
 
 template <typename AddressType>
 constexpr typename DwarfCfa<AddressType>::process_func DwarfCfa<AddressType>::kCallbackTable[64];
@@ -711,3 +714,5 @@
 // Explicitly instantiate DwarfCfa.
 template class DwarfCfa<uint32_t>;
 template class DwarfCfa<uint64_t>;
+
+}  // namespace unwindstack
diff --git a/libunwindstack/DwarfCfa.h b/libunwindstack/DwarfCfa.h
index 42ebae1..62b9b7a 100644
--- a/libunwindstack/DwarfCfa.h
+++ b/libunwindstack/DwarfCfa.h
@@ -24,10 +24,13 @@
 #include <type_traits>
 #include <vector>
 
+#include <unwindstack/DwarfLocation.h>
+#include <unwindstack/DwarfMemory.h>
+#include <unwindstack/DwarfStructs.h>
+
 #include "DwarfError.h"
-#include "DwarfLocation.h"
-#include "DwarfMemory.h"
-#include "DwarfStructs.h"
+
+namespace unwindstack {
 
 // DWARF Standard home: http://dwarfstd.org/
 // This code is based on DWARF 4: http://http://dwarfstd.org/doc/DWARF4.pdf
@@ -252,4 +255,6 @@
   };
 };
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_DWARF_CFA_H
diff --git a/libunwindstack/DwarfDebugFrame.cpp b/libunwindstack/DwarfDebugFrame.cpp
index 3ac02fc..5707596 100644
--- a/libunwindstack/DwarfDebugFrame.cpp
+++ b/libunwindstack/DwarfDebugFrame.cpp
@@ -19,11 +19,14 @@
 
 #include <algorithm>
 
+#include <unwindstack/DwarfStructs.h>
+#include <unwindstack/Memory.h>
+
 #include "DwarfDebugFrame.h"
-#include "DwarfMemory.h"
-#include "DwarfSection.h"
-#include "DwarfStructs.h"
-#include "Memory.h"
+#include "DwarfEncoding.h"
+#include "DwarfError.h"
+
+namespace unwindstack {
 
 template <typename AddressType>
 bool DwarfDebugFrame<AddressType>::Init(uint64_t offset, uint64_t size) {
@@ -309,3 +312,5 @@
 // Explicitly instantiate DwarfDebugFrame.
 template class DwarfDebugFrame<uint32_t>;
 template class DwarfDebugFrame<uint64_t>;
+
+}  // namespace unwindstack
diff --git a/libunwindstack/DwarfDebugFrame.h b/libunwindstack/DwarfDebugFrame.h
index 320368c..6a6178e 100644
--- a/libunwindstack/DwarfDebugFrame.h
+++ b/libunwindstack/DwarfDebugFrame.h
@@ -21,7 +21,9 @@
 
 #include <vector>
 
-#include "DwarfSection.h"
+#include <unwindstack/DwarfSection.h>
+
+namespace unwindstack {
 
 template <typename AddressType>
 class DwarfDebugFrame : public DwarfSectionImpl<AddressType> {
@@ -73,4 +75,6 @@
   std::vector<FdeInfo> fdes_;
 };
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_DWARF_DEBUG_FRAME_H
diff --git a/libunwindstack/DwarfEhFrame.cpp b/libunwindstack/DwarfEhFrame.cpp
index 937b6bd..d0b35c3 100644
--- a/libunwindstack/DwarfEhFrame.cpp
+++ b/libunwindstack/DwarfEhFrame.cpp
@@ -16,12 +16,14 @@
 
 #include <stdint.h>
 
+#include <unwindstack/DwarfStructs.h>
+#include <unwindstack/Memory.h>
+
 #include "Check.h"
 #include "DwarfEhFrame.h"
-#include "DwarfMemory.h"
-#include "DwarfSection.h"
-#include "DwarfStructs.h"
-#include "Memory.h"
+#include "DwarfError.h"
+
+namespace unwindstack {
 
 template <typename AddressType>
 bool DwarfEhFrame<AddressType>::Init(uint64_t offset, uint64_t size) {
@@ -211,3 +213,5 @@
 // Explicitly instantiate DwarfEhFrame.
 template class DwarfEhFrame<uint32_t>;
 template class DwarfEhFrame<uint64_t>;
+
+}  // namespace unwindstack
diff --git a/libunwindstack/DwarfEhFrame.h b/libunwindstack/DwarfEhFrame.h
index e6909ed..4207b42 100644
--- a/libunwindstack/DwarfEhFrame.h
+++ b/libunwindstack/DwarfEhFrame.h
@@ -19,7 +19,9 @@
 
 #include <stdint.h>
 
-#include "DwarfSection.h"
+#include <unwindstack/DwarfSection.h>
+
+namespace unwindstack {
 
 // Forward declarations.
 class Memory;
@@ -86,4 +88,6 @@
   std::unordered_map<uint64_t, FdeInfo> fde_info_;
 };
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_DWARF_EH_FRAME_H
diff --git a/libunwindstack/DwarfEncoding.h b/libunwindstack/DwarfEncoding.h
index 0ff3b8c..20db222 100644
--- a/libunwindstack/DwarfEncoding.h
+++ b/libunwindstack/DwarfEncoding.h
@@ -19,6 +19,8 @@
 
 #include <stdint.h>
 
+namespace unwindstack {
+
 enum DwarfEncoding : uint8_t {
   DW_EH_PE_omit = 0xff,
 
@@ -44,4 +46,6 @@
   DW_EH_PE_block = 0x0f,
 };
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_DWARF_ENCODING_H
diff --git a/libunwindstack/DwarfError.h b/libunwindstack/DwarfError.h
index c00f17d..54199b8 100644
--- a/libunwindstack/DwarfError.h
+++ b/libunwindstack/DwarfError.h
@@ -19,6 +19,8 @@
 
 #include <stdint.h>
 
+namespace unwindstack {
+
 enum DwarfError : uint8_t {
   DWARF_ERROR_NONE,
   DWARF_ERROR_MEMORY_INVALID,
@@ -31,4 +33,6 @@
   DWARF_ERROR_UNSUPPORTED_VERSION,
 };
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_DWARF_ERROR_H
diff --git a/libunwindstack/DwarfMemory.cpp b/libunwindstack/DwarfMemory.cpp
index a984fc6..b6e0412 100644
--- a/libunwindstack/DwarfMemory.cpp
+++ b/libunwindstack/DwarfMemory.cpp
@@ -18,10 +18,13 @@
 
 #include <string>
 
+#include <unwindstack/DwarfMemory.h>
+#include <unwindstack/Memory.h>
+
 #include "Check.h"
 #include "DwarfEncoding.h"
-#include "DwarfMemory.h"
-#include "Memory.h"
+
+namespace unwindstack {
 
 bool DwarfMemory::ReadBytes(void* dst, size_t num_bytes) {
   if (!memory_->Read(cur_offset_, dst, num_bytes)) {
@@ -246,3 +249,5 @@
 
 template bool DwarfMemory::ReadEncodedValue<uint32_t>(uint8_t, uint64_t*);
 template bool DwarfMemory::ReadEncodedValue<uint64_t>(uint8_t, uint64_t*);
+
+}  // namespace unwindstack
diff --git a/libunwindstack/DwarfOp.cpp b/libunwindstack/DwarfOp.cpp
index 507ca08..b3fd0df 100644
--- a/libunwindstack/DwarfOp.cpp
+++ b/libunwindstack/DwarfOp.cpp
@@ -22,12 +22,15 @@
 
 #include <android-base/stringprintf.h>
 
+#include <unwindstack/DwarfMemory.h>
+#include <unwindstack/Log.h>
+#include <unwindstack/Memory.h>
+#include <unwindstack/Regs.h>
+
 #include "DwarfError.h"
-#include "DwarfMemory.h"
 #include "DwarfOp.h"
-#include "Log.h"
-#include "Memory.h"
-#include "Regs.h"
+
+namespace unwindstack {
 
 template <typename AddressType>
 constexpr typename DwarfOp<AddressType>::OpCallback DwarfOp<AddressType>::kCallbackTable[256];
@@ -460,3 +463,5 @@
 // Explicitly instantiate DwarfOp.
 template class DwarfOp<uint32_t>;
 template class DwarfOp<uint64_t>;
+
+}  // namespace unwindstack
diff --git a/libunwindstack/DwarfOp.h b/libunwindstack/DwarfOp.h
index 0f4b36d..c29bf35 100644
--- a/libunwindstack/DwarfOp.h
+++ b/libunwindstack/DwarfOp.h
@@ -25,6 +25,9 @@
 #include <vector>
 
 #include "DwarfEncoding.h"
+#include "DwarfError.h"
+
+namespace unwindstack {
 
 enum DwarfVersion : uint8_t {
   DWARF_VERSION_2 = 2,
@@ -1633,4 +1636,6 @@
   };
 };
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_DWARF_OP_H
diff --git a/libunwindstack/DwarfSection.cpp b/libunwindstack/DwarfSection.cpp
index 4c98aa3..1234eb1 100644
--- a/libunwindstack/DwarfSection.cpp
+++ b/libunwindstack/DwarfSection.cpp
@@ -16,16 +16,22 @@
 
 #include <stdint.h>
 
+#include <unwindstack/DwarfLocation.h>
+#include <unwindstack/DwarfMemory.h>
+#include <unwindstack/DwarfSection.h>
+#include <unwindstack/DwarfStructs.h>
+#include <unwindstack/Log.h>
+#include <unwindstack/Memory.h>
+#include <unwindstack/Regs.h>
+
 #include "DwarfCfa.h"
+#include "DwarfEncoding.h"
 #include "DwarfError.h"
-#include "DwarfLocation.h"
-#include "DwarfMemory.h"
 #include "DwarfOp.h"
-#include "DwarfSection.h"
-#include "DwarfStructs.h"
-#include "Log.h"
-#include "Memory.h"
-#include "Regs.h"
+
+namespace unwindstack {
+
+DwarfSection::DwarfSection(Memory* memory) : memory_(memory), last_error_(DWARF_ERROR_NONE) {}
 
 const DwarfFde* DwarfSection::GetFdeFromPc(uint64_t pc) {
   uint64_t fde_offset;
@@ -42,6 +48,7 @@
 }
 
 bool DwarfSection::Step(uint64_t pc, Regs* regs, Memory* process_memory) {
+  last_error_ = DWARF_ERROR_NONE;
   const DwarfFde* fde = GetFdeFromPc(pc);
   if (fde == nullptr || fde->cie == nullptr) {
     last_error_ = DWARF_ERROR_ILLEGAL_STATE;
@@ -248,6 +255,9 @@
     last_error_ = DWARF_ERROR_MEMORY_INVALID;
     return false;
   }
+  // Set the default for the lsda encoding.
+  cie->lsda_encoding = DW_EH_PE_omit;
+
   if (length32 == static_cast<uint32_t>(-1)) {
     // 64 bit Cie
     uint64_t length64;
@@ -541,3 +551,5 @@
 // Explicitly instantiate DwarfSectionImpl
 template class DwarfSectionImpl<uint32_t>;
 template class DwarfSectionImpl<uint64_t>;
+
+}  // namespace unwindstack
diff --git a/libunwindstack/Elf.cpp b/libunwindstack/Elf.cpp
index ad1447a..a800c31 100644
--- a/libunwindstack/Elf.cpp
+++ b/libunwindstack/Elf.cpp
@@ -23,12 +23,17 @@
 #define LOG_TAG "unwind"
 #include <log/log.h>
 
-#include "Elf.h"
-#include "ElfInterface.h"
+#include <unwindstack/Elf.h>
+#include <unwindstack/ElfInterface.h>
+#include <unwindstack/MapInfo.h>
+#include <unwindstack/Memory.h>
+#include <unwindstack/Regs.h>
+
 #include "ElfInterfaceArm.h"
 #include "Machine.h"
-#include "Memory.h"
-#include "Regs.h"
+#include "Symbols.h"
+
+namespace unwindstack {
 
 bool Elf::Init() {
   if (!memory_) {
@@ -71,6 +76,36 @@
   }
 }
 
+bool Elf::GetSoname(std::string* name) {
+  return valid_ && interface_->GetSoname(name);
+}
+
+uint64_t Elf::GetRelPc(uint64_t pc, const MapInfo* map_info) {
+  uint64_t load_bias = 0;
+  if (valid()) {
+    load_bias = interface_->load_bias();
+  }
+
+  return pc - map_info->start + load_bias + map_info->elf_offset;
+}
+
+bool Elf::GetFunctionName(uint64_t addr, std::string* name, uint64_t* func_offset) {
+  return valid_ && (interface_->GetFunctionName(addr, name, func_offset) ||
+                    (gnu_debugdata_interface_ &&
+                     gnu_debugdata_interface_->GetFunctionName(addr, name, func_offset)));
+}
+
+bool Elf::Step(uint64_t rel_pc, Regs* regs, Memory* process_memory) {
+  return valid_ && (interface_->Step(rel_pc, regs, process_memory) ||
+                    (gnu_debugdata_interface_ &&
+                     gnu_debugdata_interface_->Step(rel_pc, regs, process_memory)));
+}
+
+uint64_t Elf::GetLoadBias() {
+  if (!valid_) return 0;
+  return interface_->load_bias();
+}
+
 bool Elf::IsValidElf(Memory* memory) {
   if (memory == nullptr) {
     return false;
@@ -133,3 +168,5 @@
 
   return interface.release();
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/ElfInterface.cpp b/libunwindstack/ElfInterface.cpp
index 7d38ee0..75abc85 100644
--- a/libunwindstack/ElfInterface.cpp
+++ b/libunwindstack/ElfInterface.cpp
@@ -24,15 +24,18 @@
 #include <Xz.h>
 #include <XzCrc64.h>
 
+#include <unwindstack/DwarfSection.h>
+#include <unwindstack/ElfInterface.h>
+#include <unwindstack/Log.h>
+#include <unwindstack/Memory.h>
+#include <unwindstack/Regs.h>
+
 #include "DwarfDebugFrame.h"
 #include "DwarfEhFrame.h"
-#include "DwarfSection.h"
-#include "ElfInterface.h"
-#include "Log.h"
-#include "Memory.h"
-#include "Regs.h"
 #include "Symbols.h"
 
+namespace unwindstack {
+
 ElfInterface::~ElfInterface() {
   for (auto symbol : symbols_) {
     delete symbol;
@@ -387,3 +390,5 @@
                                                                    uint64_t*);
 template bool ElfInterface::GetFunctionNameWithTemplate<Elf64_Sym>(uint64_t, std::string*,
                                                                    uint64_t*);
+
+}  // namespace unwindstack
diff --git a/libunwindstack/ElfInterfaceArm.cpp b/libunwindstack/ElfInterfaceArm.cpp
index bab84cc..66bc51f 100644
--- a/libunwindstack/ElfInterfaceArm.cpp
+++ b/libunwindstack/ElfInterfaceArm.cpp
@@ -17,12 +17,14 @@
 #include <elf.h>
 #include <stdint.h>
 
+#include <unwindstack/Memory.h>
+#include <unwindstack/Regs.h>
+
 #include "ArmExidx.h"
-#include "ElfInterface.h"
 #include "ElfInterfaceArm.h"
 #include "Machine.h"
-#include "Memory.h"
-#include "Regs.h"
+
+namespace unwindstack {
 
 bool ElfInterfaceArm::FindEntry(uint32_t pc, uint64_t* entry_offset) {
   if (start_offset_ == 0 || total_entries_ == 0) {
@@ -127,3 +129,5 @@
   }
   return false;
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/ElfInterfaceArm.h b/libunwindstack/ElfInterfaceArm.h
index ece694f..1f4e8cb 100644
--- a/libunwindstack/ElfInterfaceArm.h
+++ b/libunwindstack/ElfInterfaceArm.h
@@ -23,8 +23,10 @@
 #include <iterator>
 #include <unordered_map>
 
-#include "ElfInterface.h"
-#include "Memory.h"
+#include <unwindstack/ElfInterface.h>
+#include <unwindstack/Memory.h>
+
+namespace unwindstack {
 
 class ElfInterfaceArm : public ElfInterface32 {
  public:
@@ -87,4 +89,6 @@
   std::unordered_map<size_t, uint32_t> addrs_;
 };
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_ELF_INTERFACE_ARM_H
diff --git a/libunwindstack/Log.cpp b/libunwindstack/Log.cpp
index faeb66c..436e23c 100644
--- a/libunwindstack/Log.cpp
+++ b/libunwindstack/Log.cpp
@@ -25,7 +25,9 @@
 
 #include <android-base/stringprintf.h>
 
-#include "Log.h"
+#include <unwindstack/Log.h>
+
+namespace unwindstack {
 
 static bool g_print_to_stdout = false;
 
@@ -51,3 +53,5 @@
   }
   va_end(args);
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/Machine.h b/libunwindstack/Machine.h
index bcc3788..1fb9309 100644
--- a/libunwindstack/Machine.h
+++ b/libunwindstack/Machine.h
@@ -19,6 +19,8 @@
 
 #include <stdint.h>
 
+namespace unwindstack {
+
 enum ArmReg : uint16_t {
   ARM_REG_R0 = 0,
   ARM_REG_R1,
@@ -134,4 +136,6 @@
   X86_64_REG_PC = X86_64_REG_RIP,
 };
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_MACHINE_H
diff --git a/libunwindstack/MapInfo.cpp b/libunwindstack/MapInfo.cpp
index d7b483d..d0e1216 100644
--- a/libunwindstack/MapInfo.cpp
+++ b/libunwindstack/MapInfo.cpp
@@ -20,10 +20,12 @@
 #include <memory>
 #include <string>
 
-#include "Elf.h"
-#include "MapInfo.h"
-#include "Maps.h"
-#include "Memory.h"
+#include <unwindstack/Elf.h>
+#include <unwindstack/MapInfo.h>
+#include <unwindstack/Maps.h>
+#include <unwindstack/Memory.h>
+
+namespace unwindstack {
 
 Memory* MapInfo::CreateMemory(pid_t pid) {
   if (end <= start) {
@@ -86,3 +88,5 @@
   // don't try to reinit the object.
   return elf;
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/Maps.cpp b/libunwindstack/Maps.cpp
index b869918..8a90423 100644
--- a/libunwindstack/Maps.cpp
+++ b/libunwindstack/Maps.cpp
@@ -29,7 +29,11 @@
 #include <string>
 #include <vector>
 
-#include "Maps.h"
+#include <unwindstack/Elf.h>
+#include <unwindstack/Maps.h>
+#include <unwindstack/Memory.h>
+
+namespace unwindstack {
 
 MapInfo* Maps::Find(uint64_t pc) {
   if (maps_.empty()) {
@@ -196,3 +200,5 @@
   }
   return true;
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/Memory.cpp b/libunwindstack/Memory.cpp
index 9e46509..8c36055 100644
--- a/libunwindstack/Memory.cpp
+++ b/libunwindstack/Memory.cpp
@@ -28,7 +28,11 @@
 
 #include <android-base/unique_fd.h>
 
-#include "Memory.h"
+#include <unwindstack/Memory.h>
+
+#include "Check.h"
+
+namespace unwindstack {
 
 bool Memory::ReadString(uint64_t addr, std::string* string, uint64_t max_read) {
   string->clear();
@@ -245,6 +249,11 @@
   return true;
 }
 
+MemoryRange::MemoryRange(Memory* memory, uint64_t begin, uint64_t end)
+    : memory_(memory), begin_(begin), length_(end - begin) {
+  CHECK(end > begin);
+}
+
 bool MemoryRange::Read(uint64_t addr, void* dst, size_t size) {
   uint64_t max_read;
   if (__builtin_add_overflow(addr, size, &max_read) || max_read > length_) {
@@ -253,3 +262,5 @@
   // The check above guarantees that addr + begin_ will not overflow.
   return memory_->Read(addr + begin_, dst, size);
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/Regs.cpp b/libunwindstack/Regs.cpp
index 92b6e22..aa59e31 100644
--- a/libunwindstack/Regs.cpp
+++ b/libunwindstack/Regs.cpp
@@ -21,24 +21,17 @@
 
 #include <vector>
 
+#include <unwindstack/Elf.h>
+#include <unwindstack/MapInfo.h>
+#include <unwindstack/Memory.h>
+#include <unwindstack/Regs.h>
+
 #include "Check.h"
-#include "Elf.h"
-#include "ElfInterface.h"
 #include "Machine.h"
-#include "MapInfo.h"
-#include "Regs.h"
 #include "Ucontext.h"
 #include "User.h"
 
-template <typename AddressType>
-uint64_t RegsImpl<AddressType>::GetRelPc(Elf* elf, const MapInfo* map_info) {
-  uint64_t load_bias = 0;
-  if (elf->valid()) {
-    load_bias = elf->interface()->load_bias();
-  }
-
-  return pc_ - map_info->start + load_bias + map_info->elf_offset;
-}
+namespace unwindstack {
 
 template <typename AddressType>
 bool RegsImpl<AddressType>::GetReturnAddressFromDefault(Memory* memory, uint64_t* value) {
@@ -354,3 +347,5 @@
 #endif
   return regs;
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/Symbols.cpp b/libunwindstack/Symbols.cpp
index edc2187..42d816a 100644
--- a/libunwindstack/Symbols.cpp
+++ b/libunwindstack/Symbols.cpp
@@ -19,10 +19,13 @@
 
 #include <string>
 
+#include <unwindstack/Memory.h>
+
 #include "Check.h"
-#include "Memory.h"
 #include "Symbols.h"
 
+namespace unwindstack {
+
 Symbols::Symbols(uint64_t offset, uint64_t size, uint64_t entry_size, uint64_t str_offset,
                  uint64_t str_size)
     : cur_offset_(offset),
@@ -108,3 +111,5 @@
 // Instantiate all of the needed template functions.
 template bool Symbols::GetName<Elf32_Sym>(uint64_t, uint64_t, Memory*, std::string*, uint64_t*);
 template bool Symbols::GetName<Elf64_Sym>(uint64_t, uint64_t, Memory*, std::string*, uint64_t*);
+
+}  // namespace unwindstack
diff --git a/libunwindstack/Symbols.h b/libunwindstack/Symbols.h
index 3c0d033..689144b 100644
--- a/libunwindstack/Symbols.h
+++ b/libunwindstack/Symbols.h
@@ -22,6 +22,8 @@
 #include <string>
 #include <vector>
 
+namespace unwindstack {
+
 // Forward declaration.
 class Memory;
 
@@ -61,4 +63,6 @@
   std::vector<Info> symbols_;
 };
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_SYMBOLS_H
diff --git a/libunwindstack/Ucontext.h b/libunwindstack/Ucontext.h
index 95ba682..410af26 100644
--- a/libunwindstack/Ucontext.h
+++ b/libunwindstack/Ucontext.h
@@ -31,6 +31,8 @@
 
 #include <stdint.h>
 
+namespace unwindstack {
+
 //-------------------------------------------------------------------
 // ARM ucontext structures
 //-------------------------------------------------------------------
@@ -177,4 +179,6 @@
 } x86_64_ucontext_t;
 //-------------------------------------------------------------------
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_UCONTEXT_H
diff --git a/libunwindstack/User.h b/libunwindstack/User.h
index a695467..53f7e50 100644
--- a/libunwindstack/User.h
+++ b/libunwindstack/User.h
@@ -29,6 +29,8 @@
 #ifndef _LIBUNWINDSTACK_USER_H
 #define _LIBUNWINDSTACK_USER_H
 
+namespace unwindstack {
+
 struct x86_user_regs {
   uint32_t ebx;
   uint32_t ecx;
@@ -93,4 +95,6 @@
 // The largest user structure.
 constexpr size_t MAX_USER_REGS_SIZE = sizeof(arm64_user_regs) + 10;
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_USER_H
diff --git a/libunwindstack/DwarfLocation.h b/libunwindstack/include/unwindstack/DwarfLocation.h
similarity index 95%
rename from libunwindstack/DwarfLocation.h
rename to libunwindstack/include/unwindstack/DwarfLocation.h
index 062d125..3467e6a 100644
--- a/libunwindstack/DwarfLocation.h
+++ b/libunwindstack/include/unwindstack/DwarfLocation.h
@@ -21,6 +21,8 @@
 
 #include <unordered_map>
 
+namespace unwindstack {
+
 enum DwarfLocationEnum : uint8_t {
   DWARF_LOCATION_INVALID = 0,
   DWARF_LOCATION_UNDEFINED,
@@ -38,4 +40,6 @@
 
 typedef std::unordered_map<uint16_t, DwarfLocation> dwarf_loc_regs_t;
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_DWARF_LOCATION_H
diff --git a/libunwindstack/DwarfMemory.h b/libunwindstack/include/unwindstack/DwarfMemory.h
similarity index 97%
rename from libunwindstack/DwarfMemory.h
rename to libunwindstack/include/unwindstack/DwarfMemory.h
index a304dd9..8dd8d2b 100644
--- a/libunwindstack/DwarfMemory.h
+++ b/libunwindstack/include/unwindstack/DwarfMemory.h
@@ -19,6 +19,8 @@
 
 #include <stdint.h>
 
+namespace unwindstack {
+
 // Forward declarations.
 class Memory;
 
@@ -69,4 +71,6 @@
   uint64_t text_offset_ = static_cast<uint64_t>(-1);
 };
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_DWARF_MEMORY_H
diff --git a/libunwindstack/DwarfSection.h b/libunwindstack/include/unwindstack/DwarfSection.h
similarity index 93%
rename from libunwindstack/DwarfSection.h
rename to libunwindstack/include/unwindstack/DwarfSection.h
index e617601..a97ca2b 100644
--- a/libunwindstack/DwarfSection.h
+++ b/libunwindstack/include/unwindstack/DwarfSection.h
@@ -22,18 +22,20 @@
 #include <iterator>
 #include <unordered_map>
 
-#include "DwarfError.h"
-#include "DwarfLocation.h"
-#include "DwarfMemory.h"
-#include "DwarfStructs.h"
+#include <unwindstack/DwarfLocation.h>
+#include <unwindstack/DwarfMemory.h>
+#include <unwindstack/DwarfStructs.h>
+
+namespace unwindstack {
 
 // Forward declarations.
+enum DwarfError : uint8_t;
 class Memory;
 class Regs;
 
 class DwarfSection {
  public:
-  DwarfSection(Memory* memory) : memory_(memory) {}
+  DwarfSection(Memory* memory);
   virtual ~DwarfSection() = default;
 
   class iterator : public std::iterator<std::bidirectional_iterator_tag, DwarfFde*> {
@@ -102,7 +104,7 @@
 
  protected:
   DwarfMemory memory_;
-  DwarfError last_error_ = DWARF_ERROR_NONE;
+  DwarfError last_error_;
 
   uint64_t fde_count_;
   std::unordered_map<uint64_t, DwarfFde> fde_entries_;
@@ -134,4 +136,6 @@
                       AddressType* value);
 };
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_DWARF_SECTION_H
diff --git a/libunwindstack/DwarfStructs.h b/libunwindstack/include/unwindstack/DwarfStructs.h
similarity index 92%
rename from libunwindstack/DwarfStructs.h
rename to libunwindstack/include/unwindstack/DwarfStructs.h
index 87182c9..4b481f0 100644
--- a/libunwindstack/DwarfStructs.h
+++ b/libunwindstack/include/unwindstack/DwarfStructs.h
@@ -21,12 +21,12 @@
 
 #include <vector>
 
-#include "DwarfEncoding.h"
+namespace unwindstack {
 
 struct DwarfCie {
   uint8_t version = 0;
-  uint8_t fde_address_encoding = DW_EH_PE_absptr;
-  uint8_t lsda_encoding = DW_EH_PE_omit;
+  uint8_t fde_address_encoding = 0;
+  uint8_t lsda_encoding = 0;
   uint8_t segment_size = 0;
   std::vector<char> augmentation_string;
   uint64_t personality_handler = 0;
@@ -49,4 +49,6 @@
 
 constexpr uint16_t CFA_REG = static_cast<uint16_t>(-1);
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_DWARF_STRUCTS_H
diff --git a/libunwindstack/Elf.h b/libunwindstack/include/unwindstack/Elf.h
similarity index 75%
rename from libunwindstack/Elf.h
rename to libunwindstack/include/unwindstack/Elf.h
index cff9dc4..d89a746 100644
--- a/libunwindstack/Elf.h
+++ b/libunwindstack/include/unwindstack/Elf.h
@@ -22,14 +22,17 @@
 #include <memory>
 #include <string>
 
-#include "ElfInterface.h"
-#include "Memory.h"
+#include <unwindstack/ElfInterface.h>
+#include <unwindstack/Memory.h>
 
 #if !defined(EM_AARCH64)
 #define EM_AARCH64 183
 #endif
 
+namespace unwindstack {
+
 // Forward declaration.
+struct MapInfo;
 class Regs;
 
 class Elf {
@@ -41,24 +44,18 @@
 
   void InitGnuDebugdata();
 
-  bool GetSoname(std::string* name) {
-    return valid_ && interface_->GetSoname(name);
-  }
+  bool GetSoname(std::string* name);
 
-  bool GetFunctionName(uint64_t addr, std::string* name, uint64_t* func_offset) {
-    return valid_ && (interface_->GetFunctionName(addr, name, func_offset) ||
-                      (gnu_debugdata_interface_ &&
-                       gnu_debugdata_interface_->GetFunctionName(addr, name, func_offset)));
-  }
+  bool GetFunctionName(uint64_t addr, std::string* name, uint64_t* func_offset);
 
-  bool Step(uint64_t rel_pc, Regs* regs, Memory* process_memory) {
-    return valid_ && (interface_->Step(rel_pc, regs, process_memory) ||
-                      (gnu_debugdata_interface_ &&
-                       gnu_debugdata_interface_->Step(rel_pc, regs, process_memory)));
-  }
+  uint64_t GetRelPc(uint64_t pc, const MapInfo* map_info);
+
+  bool Step(uint64_t rel_pc, Regs* regs, Memory* process_memory);
 
   ElfInterface* CreateInterfaceFromMemory(Memory* memory);
 
+  uint64_t GetLoadBias();
+
   bool valid() { return valid_; }
 
   uint32_t machine_type() { return machine_type_; }
@@ -84,4 +81,6 @@
   std::unique_ptr<ElfInterface> gnu_debugdata_interface_;
 };
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_ELF_H
diff --git a/libunwindstack/ElfInterface.h b/libunwindstack/include/unwindstack/ElfInterface.h
similarity index 97%
rename from libunwindstack/ElfInterface.h
rename to libunwindstack/include/unwindstack/ElfInterface.h
index d0d0d28..5cac0d3 100644
--- a/libunwindstack/ElfInterface.h
+++ b/libunwindstack/include/unwindstack/ElfInterface.h
@@ -25,7 +25,9 @@
 #include <unordered_map>
 #include <vector>
 
-#include "DwarfSection.h"
+#include <unwindstack/DwarfSection.h>
+
+namespace unwindstack {
 
 // Forward declarations.
 class Memory;
@@ -166,4 +168,6 @@
   }
 };
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_ELF_INTERFACE_H
diff --git a/libunwindstack/Log.h b/libunwindstack/include/unwindstack/Log.h
similarity index 93%
rename from libunwindstack/Log.h
rename to libunwindstack/include/unwindstack/Log.h
index 2d01aa8..aa1219c 100644
--- a/libunwindstack/Log.h
+++ b/libunwindstack/include/unwindstack/Log.h
@@ -19,7 +19,11 @@
 
 #include <stdint.h>
 
+namespace unwindstack {
+
 void log_to_stdout(bool enable);
 void log(uint8_t indent, const char* format, ...);
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_LOG_H
diff --git a/libunwindstack/MapInfo.h b/libunwindstack/include/unwindstack/MapInfo.h
similarity index 95%
rename from libunwindstack/MapInfo.h
rename to libunwindstack/include/unwindstack/MapInfo.h
index 79a2ada..2a97dde 100644
--- a/libunwindstack/MapInfo.h
+++ b/libunwindstack/include/unwindstack/MapInfo.h
@@ -21,6 +21,8 @@
 
 #include <string>
 
+namespace unwindstack {
+
 // Forward declarations.
 class Elf;
 class Memory;
@@ -42,4 +44,6 @@
   Elf* GetElf(pid_t pid, bool init_gnu_debugdata = false);
 };
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_MAP_INFO_H
diff --git a/libunwindstack/Maps.h b/libunwindstack/include/unwindstack/Maps.h
similarity index 96%
rename from libunwindstack/Maps.h
rename to libunwindstack/include/unwindstack/Maps.h
index 239b64a..0b02739 100644
--- a/libunwindstack/Maps.h
+++ b/libunwindstack/include/unwindstack/Maps.h
@@ -23,8 +23,9 @@
 #include <string>
 #include <vector>
 
-#include "Elf.h"
-#include "MapInfo.h"
+#include <unwindstack/MapInfo.h>
+
+namespace unwindstack {
 
 // Special flag to indicate a map is in /dev/. However, a map in
 // /dev/ashmem/... does not set this flag.
@@ -104,4 +105,6 @@
   bool Parse() override;
 };
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_MAPS_H
diff --git a/libunwindstack/Memory.h b/libunwindstack/include/unwindstack/Memory.h
similarity index 89%
rename from libunwindstack/Memory.h
rename to libunwindstack/include/unwindstack/Memory.h
index e353cab..0c05266 100644
--- a/libunwindstack/Memory.h
+++ b/libunwindstack/include/unwindstack/Memory.h
@@ -24,7 +24,7 @@
 #include <string>
 #include <vector>
 
-#include "Check.h"
+namespace unwindstack {
 
 class Memory {
  public:
@@ -47,13 +47,9 @@
     return Read(offset, field, size);
   }
 
-  inline bool Read32(uint64_t addr, uint32_t* dst) {
-    return Read(addr, dst, sizeof(uint32_t));
-  }
+  inline bool Read32(uint64_t addr, uint32_t* dst) { return Read(addr, dst, sizeof(uint32_t)); }
 
-  inline bool Read64(uint64_t addr, uint64_t* dst) {
-    return Read(addr, dst, sizeof(uint64_t));
-  }
+  inline bool Read64(uint64_t addr, uint64_t* dst) { return Read(addr, dst, sizeof(uint64_t)); }
 };
 
 class MemoryBuffer : public Memory {
@@ -129,10 +125,7 @@
 
 class MemoryRange : public Memory {
  public:
-  MemoryRange(Memory* memory, uint64_t begin, uint64_t end)
-      : memory_(memory), begin_(begin), length_(end - begin) {
-    CHECK(end > begin);
-  }
+  MemoryRange(Memory* memory, uint64_t begin, uint64_t end);
   virtual ~MemoryRange() { delete memory_; }
 
   bool Read(uint64_t addr, void* dst, size_t size) override;
@@ -143,4 +136,6 @@
   uint64_t length_;
 };
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_MEMORY_H
diff --git a/libunwindstack/Regs.h b/libunwindstack/include/unwindstack/Regs.h
similarity index 95%
rename from libunwindstack/Regs.h
rename to libunwindstack/include/unwindstack/Regs.h
index a7567d8..ab98f32 100644
--- a/libunwindstack/Regs.h
+++ b/libunwindstack/include/unwindstack/Regs.h
@@ -21,9 +21,12 @@
 
 #include <vector>
 
+namespace unwindstack {
+
 // Forward declarations.
 class Elf;
 struct MapInfo;
+class Memory;
 
 class Regs {
  public:
@@ -50,8 +53,6 @@
 
   virtual bool GetReturnAddressFromDefault(Memory* memory, uint64_t* value) = 0;
 
-  virtual uint64_t GetRelPc(Elf* elf, const MapInfo* map_info) = 0;
-
   virtual uint64_t GetAdjustedPc(uint64_t rel_pc, Elf* elf) = 0;
 
   virtual void SetFromRaw() = 0;
@@ -77,8 +78,6 @@
       : Regs(total_regs, sp_reg, return_loc), regs_(total_regs) {}
   virtual ~RegsImpl() = default;
 
-  uint64_t GetRelPc(Elf* elf, const MapInfo* map_info) override;
-
   bool GetReturnAddressFromDefault(Memory* memory, uint64_t* value) override;
 
   uint64_t pc() override { return pc_; }
@@ -137,4 +136,6 @@
   void SetFromRaw() override;
 };
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_REGS_H
diff --git a/libunwindstack/RegsGetLocal.h b/libunwindstack/include/unwindstack/RegsGetLocal.h
similarity index 98%
rename from libunwindstack/RegsGetLocal.h
rename to libunwindstack/include/unwindstack/RegsGetLocal.h
index 8e6d04c..ffec213 100644
--- a/libunwindstack/RegsGetLocal.h
+++ b/libunwindstack/include/unwindstack/RegsGetLocal.h
@@ -29,6 +29,8 @@
 #ifndef _LIBUNWINDSTACK_REGS_GET_LOCAL_H
 #define _LIBUNWINDSTACK_REGS_GET_LOCAL_H
 
+namespace unwindstack {
+
 #if defined(__arm__)
 
 inline void RegsGetLocal(Regs* regs) {
@@ -97,4 +99,6 @@
 
 #endif
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_REGS_GET_LOCAL_H
diff --git a/libunwindstack/tests/ArmExidxDecodeTest.cpp b/libunwindstack/tests/ArmExidxDecodeTest.cpp
index 4fff48e..94cb493 100644
--- a/libunwindstack/tests/ArmExidxDecodeTest.cpp
+++ b/libunwindstack/tests/ArmExidxDecodeTest.cpp
@@ -23,13 +23,16 @@
 
 #include <gtest/gtest.h>
 
+#include <unwindstack/Log.h>
+#include <unwindstack/Regs.h>
+
 #include "ArmExidx.h"
-#include "Regs.h"
-#include "Log.h"
 
 #include "LogFake.h"
 #include "MemoryFake.h"
 
+namespace unwindstack {
+
 class ArmExidxDecodeTest : public ::testing::TestWithParam<std::string> {
  protected:
   void Init(Memory* process_memory = nullptr) {
@@ -1092,3 +1095,5 @@
 }
 
 INSTANTIATE_TEST_CASE_P(, ArmExidxDecodeTest, ::testing::Values("logging", "no_logging"));
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/ArmExidxExtractTest.cpp b/libunwindstack/tests/ArmExidxExtractTest.cpp
index aed75bf..caad131 100644
--- a/libunwindstack/tests/ArmExidxExtractTest.cpp
+++ b/libunwindstack/tests/ArmExidxExtractTest.cpp
@@ -21,12 +21,15 @@
 
 #include <gtest/gtest.h>
 
+#include <unwindstack/Log.h>
+
 #include "ArmExidx.h"
-#include "Log.h"
 
 #include "LogFake.h"
 #include "MemoryFake.h"
 
+namespace unwindstack {
+
 class ArmExidxExtractTest : public ::testing::Test {
  protected:
   void SetUp() override {
@@ -329,3 +332,5 @@
   ASSERT_TRUE(exidx_->ExtractEntryData(0x5000));
   ASSERT_EQ("4 unwind Raw Data: 0x11 0x22 0x33 0xb0\n", GetFakeLogPrint());
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/DwarfCfaLogTest.cpp b/libunwindstack/tests/DwarfCfaLogTest.cpp
index 967c2c2..b17ca33 100644
--- a/libunwindstack/tests/DwarfCfaLogTest.cpp
+++ b/libunwindstack/tests/DwarfCfaLogTest.cpp
@@ -23,15 +23,18 @@
 #include <android-base/stringprintf.h>
 #include <gtest/gtest.h>
 
+#include <unwindstack/DwarfLocation.h>
+#include <unwindstack/DwarfMemory.h>
+#include <unwindstack/DwarfStructs.h>
+#include <unwindstack/Log.h>
+
 #include "DwarfCfa.h"
-#include "DwarfLocation.h"
-#include "DwarfMemory.h"
-#include "DwarfStructs.h"
-#include "Log.h"
 
 #include "LogFake.h"
 #include "MemoryFake.h"
 
+namespace unwindstack {
+
 template <typename TypeParam>
 class DwarfCfaLogTest : public ::testing::Test {
  protected:
@@ -812,3 +815,5 @@
 
 typedef ::testing::Types<uint32_t, uint64_t> DwarfCfaLogTestTypes;
 INSTANTIATE_TYPED_TEST_CASE_P(, DwarfCfaLogTest, DwarfCfaLogTestTypes);
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/DwarfCfaTest.cpp b/libunwindstack/tests/DwarfCfaTest.cpp
index 687af7d..73a67ac 100644
--- a/libunwindstack/tests/DwarfCfaTest.cpp
+++ b/libunwindstack/tests/DwarfCfaTest.cpp
@@ -21,15 +21,19 @@
 
 #include <gtest/gtest.h>
 
+#include <unwindstack/DwarfLocation.h>
+#include <unwindstack/DwarfMemory.h>
+#include <unwindstack/DwarfStructs.h>
+#include <unwindstack/Log.h>
+
 #include "DwarfCfa.h"
-#include "DwarfLocation.h"
-#include "DwarfMemory.h"
-#include "DwarfStructs.h"
-#include "Log.h"
+#include "DwarfError.h"
 
 #include "LogFake.h"
 #include "MemoryFake.h"
 
+namespace unwindstack {
+
 template <typename TypeParam>
 class DwarfCfaTest : public ::testing::Test {
  protected:
@@ -957,3 +961,5 @@
 
 typedef ::testing::Types<uint32_t, uint64_t> DwarfCfaTestTypes;
 INSTANTIATE_TYPED_TEST_CASE_P(, DwarfCfaTest, DwarfCfaTestTypes);
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/DwarfDebugFrameTest.cpp b/libunwindstack/tests/DwarfDebugFrameTest.cpp
index 94a9974..69813e5 100644
--- a/libunwindstack/tests/DwarfDebugFrameTest.cpp
+++ b/libunwindstack/tests/DwarfDebugFrameTest.cpp
@@ -21,11 +21,14 @@
 
 #include "DwarfDebugFrame.h"
 #include "DwarfEncoding.h"
+#include "DwarfError.h"
 
 #include "LogFake.h"
 #include "MemoryFake.h"
 #include "RegsFake.h"
 
+namespace unwindstack {
+
 template <typename TypeParam>
 class MockDwarfDebugFrame : public DwarfDebugFrame<TypeParam> {
  public:
@@ -454,3 +457,5 @@
 
 typedef ::testing::Types<uint32_t, uint64_t> DwarfDebugFrameTestTypes;
 INSTANTIATE_TYPED_TEST_CASE_P(, DwarfDebugFrameTest, DwarfDebugFrameTestTypes);
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/DwarfEhFrameTest.cpp b/libunwindstack/tests/DwarfEhFrameTest.cpp
index 4e538d4..e9501e3 100644
--- a/libunwindstack/tests/DwarfEhFrameTest.cpp
+++ b/libunwindstack/tests/DwarfEhFrameTest.cpp
@@ -21,11 +21,14 @@
 
 #include "DwarfEhFrame.h"
 #include "DwarfEncoding.h"
+#include "DwarfError.h"
 
 #include "LogFake.h"
 #include "MemoryFake.h"
 #include "RegsFake.h"
 
+namespace unwindstack {
+
 template <typename TypeParam>
 class MockDwarfEhFrame : public DwarfEhFrame<TypeParam> {
  public:
@@ -407,3 +410,5 @@
 
 typedef ::testing::Types<uint32_t, uint64_t> DwarfEhFrameTestTypes;
 INSTANTIATE_TYPED_TEST_CASE_P(, DwarfEhFrameTest, DwarfEhFrameTestTypes);
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/DwarfMemoryTest.cpp b/libunwindstack/tests/DwarfMemoryTest.cpp
index b7df8f7..08fe7cf 100644
--- a/libunwindstack/tests/DwarfMemoryTest.cpp
+++ b/libunwindstack/tests/DwarfMemoryTest.cpp
@@ -21,10 +21,12 @@
 
 #include <gtest/gtest.h>
 
-#include "DwarfMemory.h"
+#include <unwindstack/DwarfMemory.h>
 
 #include "MemoryFake.h"
 
+namespace unwindstack {
+
 class DwarfMemoryTest : public ::testing::Test {
  protected:
   void SetUp() override {
@@ -494,3 +496,5 @@
   ASSERT_TRUE(dwarf_mem_->AdjustEncodedValue(0x40, &value));
   ASSERT_EQ(0x14234U, value);
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/DwarfOpLogTest.cpp b/libunwindstack/tests/DwarfOpLogTest.cpp
index d18aad0..234d1c9 100644
--- a/libunwindstack/tests/DwarfOpLogTest.cpp
+++ b/libunwindstack/tests/DwarfOpLogTest.cpp
@@ -21,14 +21,17 @@
 
 #include <gtest/gtest.h>
 
+#include <unwindstack/DwarfMemory.h>
+#include <unwindstack/Log.h>
+#include <unwindstack/Regs.h>
+
 #include "DwarfError.h"
-#include "DwarfMemory.h"
 #include "DwarfOp.h"
-#include "Log.h"
-#include "Regs.h"
 
 #include "MemoryFake.h"
 
+namespace unwindstack {
+
 template <typename TypeParam>
 class DwarfOpLogTest : public ::testing::Test {
  protected:
@@ -66,3 +69,5 @@
 
 typedef ::testing::Types<uint32_t, uint64_t> DwarfOpLogTestTypes;
 INSTANTIATE_TYPED_TEST_CASE_P(, DwarfOpLogTest, DwarfOpLogTestTypes);
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/DwarfOpTest.cpp b/libunwindstack/tests/DwarfOpTest.cpp
index 20c488a..47a40cf 100644
--- a/libunwindstack/tests/DwarfOpTest.cpp
+++ b/libunwindstack/tests/DwarfOpTest.cpp
@@ -21,14 +21,17 @@
 
 #include <gtest/gtest.h>
 
+#include <unwindstack/DwarfMemory.h>
+#include <unwindstack/Log.h>
+
 #include "DwarfError.h"
-#include "DwarfMemory.h"
 #include "DwarfOp.h"
-#include "Log.h"
 
 #include "MemoryFake.h"
 #include "RegsFake.h"
 
+namespace unwindstack {
+
 template <typename TypeParam>
 class DwarfOpTest : public ::testing::Test {
  protected:
@@ -1579,3 +1582,5 @@
 
 typedef ::testing::Types<uint32_t, uint64_t> DwarfOpTestTypes;
 INSTANTIATE_TYPED_TEST_CASE_P(, DwarfOpTest, DwarfOpTestTypes);
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/DwarfSectionImplTest.cpp b/libunwindstack/tests/DwarfSectionImplTest.cpp
index 71b114a..b871539 100644
--- a/libunwindstack/tests/DwarfSectionImplTest.cpp
+++ b/libunwindstack/tests/DwarfSectionImplTest.cpp
@@ -19,12 +19,17 @@
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
 
-#include "DwarfSection.h"
+#include <unwindstack/DwarfSection.h>
+
+#include "DwarfEncoding.h"
+#include "DwarfError.h"
 
 #include "LogFake.h"
 #include "MemoryFake.h"
 #include "RegsFake.h"
 
+namespace unwindstack {
+
 template <typename TypeParam>
 class MockDwarfSectionImpl : public DwarfSectionImpl<TypeParam> {
  public:
@@ -830,3 +835,5 @@
 
 typedef ::testing::Types<uint32_t, uint64_t> DwarfSectionImplTestTypes;
 INSTANTIATE_TYPED_TEST_CASE_P(, DwarfSectionImplTest, DwarfSectionImplTestTypes);
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/DwarfSectionTest.cpp b/libunwindstack/tests/DwarfSectionTest.cpp
index 20f0e2a..fc67063 100644
--- a/libunwindstack/tests/DwarfSectionTest.cpp
+++ b/libunwindstack/tests/DwarfSectionTest.cpp
@@ -19,10 +19,12 @@
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
 
-#include "DwarfSection.h"
+#include <unwindstack/DwarfSection.h>
 
 #include "MemoryFake.h"
 
+namespace unwindstack {
+
 class MockDwarfSection : public DwarfSection {
  public:
   MockDwarfSection(Memory* memory) : DwarfSection(memory) {}
@@ -158,3 +160,5 @@
 
   ASSERT_TRUE(mock_section.Step(0x1000, nullptr, &process));
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/ElfInterfaceArmTest.cpp b/libunwindstack/tests/ElfInterfaceArmTest.cpp
index 67c9a6b..c7ef4a1 100644
--- a/libunwindstack/tests/ElfInterfaceArmTest.cpp
+++ b/libunwindstack/tests/ElfInterfaceArmTest.cpp
@@ -20,12 +20,15 @@
 
 #include <vector>
 
+#include <unwindstack/Regs.h>
+
 #include "ElfInterfaceArm.h"
 #include "Machine.h"
-#include "Regs.h"
 
 #include "MemoryFake.h"
 
+namespace unwindstack {
+
 class ElfInterfaceArmTest : public ::testing::Test {
  protected:
   void SetUp() override {
@@ -370,3 +373,5 @@
   ASSERT_EQ(0x10U, regs.pc());
   ASSERT_EQ(0x10U, regs[ARM_REG_PC]);
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/ElfInterfaceTest.cpp b/libunwindstack/tests/ElfInterfaceTest.cpp
index 0f56ba8..acb7320 100644
--- a/libunwindstack/tests/ElfInterfaceTest.cpp
+++ b/libunwindstack/tests/ElfInterfaceTest.cpp
@@ -20,7 +20,9 @@
 
 #include <gtest/gtest.h>
 
-#include "ElfInterface.h"
+#include <unwindstack/ElfInterface.h>
+
+#include "DwarfEncoding.h"
 #include "ElfInterfaceArm.h"
 
 #include "MemoryFake.h"
@@ -33,6 +35,8 @@
 #define EM_AARCH64 183
 #endif
 
+namespace unwindstack {
+
 class ElfInterfaceTest : public ::testing::Test {
  protected:
   void SetUp() override {
@@ -921,3 +925,5 @@
 TEST_F(ElfInterfaceTest, init_section_headers_offsets64) {
   InitSectionHeadersOffsets<Elf64_Ehdr, Elf64_Shdr, ElfInterface64>();
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/ElfTest.cpp b/libunwindstack/tests/ElfTest.cpp
index bf0823b..72ceb85 100644
--- a/libunwindstack/tests/ElfTest.cpp
+++ b/libunwindstack/tests/ElfTest.cpp
@@ -22,7 +22,8 @@
 
 #include <gtest/gtest.h>
 
-#include "Elf.h"
+#include <unwindstack/Elf.h>
+#include <unwindstack/MapInfo.h>
 
 #include "ElfTestUtils.h"
 #include "MemoryFake.h"
@@ -31,6 +32,8 @@
 #define PT_ARM_EXIDX 0x70000001
 #endif
 
+namespace unwindstack {
+
 class ElfTest : public ::testing::Test {
  protected:
   void SetUp() override {
@@ -237,3 +240,33 @@
   elf.InitGnuDebugdata();
   ASSERT_TRUE(elf.gnu_debugdata_interface() != nullptr);
 }
+
+class MockElf : public Elf {
+ public:
+  MockElf(Memory* memory) : Elf(memory) {}
+  virtual ~MockElf() = default;
+
+  void set_valid(bool valid) { valid_ = valid; }
+  void set_elf_interface(ElfInterface* interface) { interface_.reset(interface); }
+};
+
+TEST_F(ElfTest, rel_pc) {
+  MockElf elf(memory_);
+
+  ElfInterface* interface = new ElfInterface32(memory_);
+  elf.set_elf_interface(interface);
+
+  elf.set_valid(true);
+  interface->set_load_bias(0);
+  MapInfo map_info{.start = 0x1000, .end = 0x2000};
+
+  ASSERT_EQ(0x101U, elf.GetRelPc(0x1101, &map_info));
+
+  interface->set_load_bias(0x3000);
+  ASSERT_EQ(0x3101U, elf.GetRelPc(0x1101, &map_info));
+
+  elf.set_valid(false);
+  ASSERT_EQ(0x101U, elf.GetRelPc(0x1101, &map_info));
+}
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/ElfTestUtils.cpp b/libunwindstack/tests/ElfTestUtils.cpp
index 81064dd..069386b 100644
--- a/libunwindstack/tests/ElfTestUtils.cpp
+++ b/libunwindstack/tests/ElfTestUtils.cpp
@@ -31,6 +31,8 @@
 
 #include "ElfTestUtils.h"
 
+namespace unwindstack {
+
 template <typename Ehdr>
 void TestInitEhdr(Ehdr* ehdr, uint32_t elf_class, uint32_t machine_type) {
   memset(ehdr, 0, sizeof(Ehdr));
@@ -136,3 +138,5 @@
                                                            TestCopyFuncType);
 template void TestInitGnuDebugdata<Elf64_Ehdr, Elf64_Shdr>(uint32_t, uint32_t, bool,
                                                            TestCopyFuncType);
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/ElfTestUtils.h b/libunwindstack/tests/ElfTestUtils.h
index 4fd3bbc..6ef00e1 100644
--- a/libunwindstack/tests/ElfTestUtils.h
+++ b/libunwindstack/tests/ElfTestUtils.h
@@ -19,6 +19,8 @@
 
 #include <functional>
 
+namespace unwindstack {
+
 typedef std::function<void(uint64_t, const void*, size_t)> TestCopyFuncType;
 
 template <typename Ehdr>
@@ -28,4 +30,6 @@
 void TestInitGnuDebugdata(uint32_t elf_class, uint32_t machine_type, bool init_gnu_debudata,
                           TestCopyFuncType copy_func);
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_TESTS_ELF_TEST_UTILS_H
diff --git a/libunwindstack/tests/LogFake.cpp b/libunwindstack/tests/LogFake.cpp
index 411594a..537ccaf 100644
--- a/libunwindstack/tests/LogFake.cpp
+++ b/libunwindstack/tests/LogFake.cpp
@@ -25,7 +25,6 @@
 #include "LogFake.h"
 
 // Forward declarations.
-class Backtrace;
 struct EventTagMap;
 struct AndroidLogEntry;
 
@@ -33,6 +32,8 @@
 
 std::string g_fake_log_print;
 
+namespace unwindstack {
+
 void ResetLogs() {
   g_fake_log_buf = "";
   g_fake_log_print = "";
@@ -46,6 +47,8 @@
   return g_fake_log_print;
 }
 
+}  // namespace unwindstack
+
 extern "C" int __android_log_buf_write(int bufId, int prio, const char* tag, const char* msg) {
   g_fake_log_buf += std::to_string(bufId) + ' ' + std::to_string(prio) + ' ';
   g_fake_log_buf += tag;
diff --git a/libunwindstack/tests/LogFake.h b/libunwindstack/tests/LogFake.h
index 006d393..e1dc50d 100644
--- a/libunwindstack/tests/LogFake.h
+++ b/libunwindstack/tests/LogFake.h
@@ -19,8 +19,12 @@
 
 #include <string>
 
+namespace unwindstack {
+
 void ResetLogs();
 std::string GetFakeLogBuf();
 std::string GetFakeLogPrint();
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_TESTS_LOG_FAKE_H
diff --git a/libunwindstack/tests/MapInfoCreateMemoryTest.cpp b/libunwindstack/tests/MapInfoCreateMemoryTest.cpp
index b82c841..9e45e78 100644
--- a/libunwindstack/tests/MapInfoCreateMemoryTest.cpp
+++ b/libunwindstack/tests/MapInfoCreateMemoryTest.cpp
@@ -30,9 +30,11 @@
 #include <android-base/test_utils.h>
 #include <gtest/gtest.h>
 
-#include "Elf.h"
-#include "MapInfo.h"
-#include "Memory.h"
+#include <unwindstack/Elf.h>
+#include <unwindstack/MapInfo.h>
+#include <unwindstack/Memory.h>
+
+namespace unwindstack {
 
 class MapInfoCreateMemoryTest : public ::testing::Test {
  protected:
@@ -203,3 +205,5 @@
   kill(pid, SIGKILL);
   ASSERT_EQ(pid, wait(nullptr));
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/MapInfoGetElfTest.cpp b/libunwindstack/tests/MapInfoGetElfTest.cpp
index fc36cc6..abfa172 100644
--- a/libunwindstack/tests/MapInfoGetElfTest.cpp
+++ b/libunwindstack/tests/MapInfoGetElfTest.cpp
@@ -30,9 +30,13 @@
 #include <android-base/test_utils.h>
 #include <gtest/gtest.h>
 
-#include "Elf.h"
+#include <unwindstack/Elf.h>
+#include <unwindstack/MapInfo.h>
+#include <unwindstack/Memory.h>
+
 #include "ElfTestUtils.h"
-#include "MapInfo.h"
+
+namespace unwindstack {
 
 class MapInfoGetElfTest : public ::testing::Test {
  protected:
@@ -138,3 +142,5 @@
   EXPECT_EQ(ELFCLASS64, elf->class_type());
   EXPECT_TRUE(elf->gnu_debugdata_interface() != nullptr);
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/MapsTest.cpp b/libunwindstack/tests/MapsTest.cpp
index 7eb9bae..9430cf3 100644
--- a/libunwindstack/tests/MapsTest.cpp
+++ b/libunwindstack/tests/MapsTest.cpp
@@ -20,7 +20,9 @@
 #include <android-base/test_utils.h>
 #include <gtest/gtest.h>
 
-#include "Maps.h"
+#include <unwindstack/Maps.h>
+
+namespace unwindstack {
 
 TEST(MapsTest, parse_permissions) {
   BufferMaps maps(
@@ -235,3 +237,5 @@
   ASSERT_EQ(PROT_READ | PROT_WRITE | PROT_EXEC, info->flags);
   ASSERT_EQ("/system/lib/fake5.so", info->name);
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/MemoryBufferTest.cpp b/libunwindstack/tests/MemoryBufferTest.cpp
index af3d6b9..50a8a1b 100644
--- a/libunwindstack/tests/MemoryBufferTest.cpp
+++ b/libunwindstack/tests/MemoryBufferTest.cpp
@@ -18,10 +18,12 @@
 
 #include <gtest/gtest.h>
 
-#include "Memory.h"
+#include <unwindstack/Memory.h>
 
 #include "LogFake.h"
 
+namespace unwindstack {
+
 class MemoryBufferTest : public ::testing::Test {
  protected:
   void SetUp() override {
@@ -75,3 +77,5 @@
 
   ASSERT_FALSE(memory_->Read(UINT64_MAX - 100, buffer.data(), 200));
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/MemoryFake.cpp b/libunwindstack/tests/MemoryFake.cpp
index afb1029..2026acc 100644
--- a/libunwindstack/tests/MemoryFake.cpp
+++ b/libunwindstack/tests/MemoryFake.cpp
@@ -21,6 +21,8 @@
 
 #include "MemoryFake.h"
 
+namespace unwindstack {
+
 void MemoryFake::SetMemory(uint64_t addr, const void* memory, size_t length) {
   const uint8_t* src = reinterpret_cast<const uint8_t*>(memory);
   for (size_t i = 0; i < length; i++, addr++) {
@@ -44,3 +46,5 @@
   }
   return true;
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/MemoryFake.h b/libunwindstack/tests/MemoryFake.h
index 70ef30a..d374261 100644
--- a/libunwindstack/tests/MemoryFake.h
+++ b/libunwindstack/tests/MemoryFake.h
@@ -23,7 +23,9 @@
 #include <vector>
 #include <unordered_map>
 
-#include "Memory.h"
+#include <unwindstack/Memory.h>
+
+namespace unwindstack {
 
 class MemoryFake : public Memory {
  public:
@@ -87,4 +89,6 @@
   }
 };
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_TESTS_MEMORY_FAKE_H
diff --git a/libunwindstack/tests/MemoryFileTest.cpp b/libunwindstack/tests/MemoryFileTest.cpp
index aa7a23a..a204bae 100644
--- a/libunwindstack/tests/MemoryFileTest.cpp
+++ b/libunwindstack/tests/MemoryFileTest.cpp
@@ -21,7 +21,9 @@
 #include <android-base/file.h>
 #include <gtest/gtest.h>
 
-#include "Memory.h"
+#include <unwindstack/Memory.h>
+
+namespace unwindstack {
 
 class MemoryFileTest : public ::testing::Test {
  protected:
@@ -269,3 +271,5 @@
     ASSERT_EQ(2, read_buffer[i]) << "Failed at byte " << i;
   }
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/MemoryLocalTest.cpp b/libunwindstack/tests/MemoryLocalTest.cpp
index ab999da..73eebdd 100644
--- a/libunwindstack/tests/MemoryLocalTest.cpp
+++ b/libunwindstack/tests/MemoryLocalTest.cpp
@@ -21,7 +21,9 @@
 
 #include <gtest/gtest.h>
 
-#include "Memory.h"
+#include <unwindstack/Memory.h>
+
+namespace unwindstack {
 
 TEST(MemoryLocalTest, read) {
   std::vector<uint8_t> src(1024);
@@ -64,3 +66,5 @@
   uint64_t value;
   ASSERT_FALSE(local.Read(reinterpret_cast<uint64_t>(&value), dst.data(), SIZE_MAX));
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/MemoryRangeTest.cpp b/libunwindstack/tests/MemoryRangeTest.cpp
index 469afcc..6d1366c 100644
--- a/libunwindstack/tests/MemoryRangeTest.cpp
+++ b/libunwindstack/tests/MemoryRangeTest.cpp
@@ -22,10 +22,12 @@
 
 #include <gtest/gtest.h>
 
-#include "Memory.h"
+#include <unwindstack/Memory.h>
 
 #include "MemoryFake.h"
 
+namespace unwindstack {
+
 TEST(MemoryRangeTest, read) {
   std::vector<uint8_t> src(1024);
   memset(src.data(), 0x4c, 1024);
@@ -70,3 +72,5 @@
   std::unique_ptr<MemoryRange> overflow(new MemoryRange(new MemoryFakeAlwaysReadZero, 100, 200));
   ASSERT_FALSE(overflow->Read(UINT64_MAX - 10, buffer.data(), 100));
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/MemoryRemoteTest.cpp b/libunwindstack/tests/MemoryRemoteTest.cpp
index 7210786..f8965b2 100644
--- a/libunwindstack/tests/MemoryRemoteTest.cpp
+++ b/libunwindstack/tests/MemoryRemoteTest.cpp
@@ -31,10 +31,12 @@
 #include <android-base/file.h>
 #include <gtest/gtest.h>
 
-#include "Memory.h"
+#include <unwindstack/Memory.h>
 
 #include "MemoryFake.h"
 
+namespace unwindstack {
+
 class MemoryRemoteTest : public ::testing::Test {
  protected:
   static uint64_t NanoTime() {
@@ -164,3 +166,5 @@
   kill(pid, SIGKILL);
   ASSERT_EQ(pid, wait(nullptr));
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/MemoryTest.cpp b/libunwindstack/tests/MemoryTest.cpp
index 51b5d7d..4a9ed9f 100644
--- a/libunwindstack/tests/MemoryTest.cpp
+++ b/libunwindstack/tests/MemoryTest.cpp
@@ -22,10 +22,12 @@
 
 #include <gtest/gtest.h>
 
-#include "Memory.h"
+#include <unwindstack/Memory.h>
 
 #include "MemoryFake.h"
 
+namespace unwindstack {
+
 TEST(MemoryTest, read32) {
   MemoryFakeAlwaysReadZero memory;
 
@@ -124,3 +126,5 @@
   ASSERT_TRUE(memory.ReadString(0, &dst_name));
   ASSERT_EQ("short", dst_name);
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/RegsFake.h b/libunwindstack/tests/RegsFake.h
index c57954c..e796c9b 100644
--- a/libunwindstack/tests/RegsFake.h
+++ b/libunwindstack/tests/RegsFake.h
@@ -19,7 +19,10 @@
 
 #include <stdint.h>
 
-#include "Regs.h"
+#include <unwindstack/Memory.h>
+#include <unwindstack/Regs.h>
+
+namespace unwindstack {
 
 template <typename TypeParam>
 class RegsFake : public RegsImpl<TypeParam> {
@@ -28,10 +31,11 @@
       : RegsImpl<TypeParam>(total_regs, sp_reg, Regs::Location(Regs::LOCATION_UNKNOWN, 0)) {}
   virtual ~RegsFake() = default;
 
-  uint64_t GetRelPc(Elf*, const MapInfo*) override { return 0; }
   uint64_t GetAdjustedPc(uint64_t, Elf*) override { return 0; }
   void SetFromRaw() override {}
   bool GetReturnAddressFromDefault(Memory*, uint64_t*) { return false; }
 };
 
+}  // namespace unwindstack
+
 #endif  // _LIBUNWINDSTACK_TESTS_REGS_FAKE_H
diff --git a/libunwindstack/tests/RegsTest.cpp b/libunwindstack/tests/RegsTest.cpp
index dde42de..3613689 100644
--- a/libunwindstack/tests/RegsTest.cpp
+++ b/libunwindstack/tests/RegsTest.cpp
@@ -18,13 +18,15 @@
 
 #include <gtest/gtest.h>
 
-#include "Elf.h"
-#include "ElfInterface.h"
-#include "MapInfo.h"
-#include "Regs.h"
+#include <unwindstack/Elf.h>
+#include <unwindstack/ElfInterface.h>
+#include <unwindstack/MapInfo.h>
+#include <unwindstack/Regs.h>
 
 #include "MemoryFake.h"
 
+namespace unwindstack {
+
 class ElfFake : public Elf {
  public:
   ElfFake(Memory* memory) : Elf(memory) { valid_ = true; }
@@ -70,9 +72,6 @@
   }
 
   template <typename AddressType>
-  void regs_rel_pc();
-
-  template <typename AddressType>
   void regs_return_address_register();
 
   ElfInterfaceFake* elf_interface_;
@@ -127,26 +126,6 @@
 }
 
 template <typename AddressType>
-void RegsTest::regs_rel_pc() {
-  RegsTestImpl<AddressType> regs(30, 12);
-
-  elf_interface_->set_load_bias(0);
-  MapInfo map_info{.start = 0x1000, .end = 0x2000};
-  regs.set_pc(0x1101);
-  ASSERT_EQ(0x101U, regs.GetRelPc(elf_.get(), &map_info));
-  elf_interface_->set_load_bias(0x3000);
-  ASSERT_EQ(0x3101U, regs.GetRelPc(elf_.get(), &map_info));
-}
-
-TEST_F(RegsTest, regs32_rel_pc) {
-  regs_rel_pc<uint32_t>();
-}
-
-TEST_F(RegsTest, regs64_rel_pc) {
-  regs_rel_pc<uint64_t>();
-}
-
-template <typename AddressType>
 void RegsTest::regs_return_address_register() {
   RegsTestImpl<AddressType> regs(20, 10, Regs::Location(Regs::LOCATION_REGISTER, 5));
 
@@ -250,19 +229,19 @@
   MapInfo map_info{.start = 0x1000, .end = 0x2000};
 
   regs_arm.set_pc(0x1500);
-  ASSERT_EQ(0x500U, regs_arm.GetRelPc(&invalid_elf, &map_info));
+  ASSERT_EQ(0x500U, invalid_elf.GetRelPc(regs_arm.pc(), &map_info));
   ASSERT_EQ(0x500U, regs_arm.GetAdjustedPc(0x500U, &invalid_elf));
 
   regs_arm64.set_pc(0x1600);
-  ASSERT_EQ(0x600U, regs_arm64.GetRelPc(&invalid_elf, &map_info));
+  ASSERT_EQ(0x600U, invalid_elf.GetRelPc(regs_arm64.pc(), &map_info));
   ASSERT_EQ(0x600U, regs_arm64.GetAdjustedPc(0x600U, &invalid_elf));
 
   regs_x86.set_pc(0x1700);
-  ASSERT_EQ(0x700U, regs_x86.GetRelPc(&invalid_elf, &map_info));
+  ASSERT_EQ(0x700U, invalid_elf.GetRelPc(regs_x86.pc(), &map_info));
   ASSERT_EQ(0x700U, regs_x86.GetAdjustedPc(0x700U, &invalid_elf));
 
   regs_x86_64.set_pc(0x1800);
-  ASSERT_EQ(0x800U, regs_x86_64.GetRelPc(&invalid_elf, &map_info));
+  ASSERT_EQ(0x800U, invalid_elf.GetRelPc(regs_x86_64.pc(), &map_info));
   ASSERT_EQ(0x800U, regs_x86_64.GetAdjustedPc(0x800U, &invalid_elf));
 }
 
@@ -305,3 +284,5 @@
   EXPECT_EQ(0x1200000000U, x86_64.sp());
   EXPECT_EQ(0x4900000000U, x86_64.pc());
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/SymbolsTest.cpp b/libunwindstack/tests/SymbolsTest.cpp
index a0a21e6..da258a6 100644
--- a/libunwindstack/tests/SymbolsTest.cpp
+++ b/libunwindstack/tests/SymbolsTest.cpp
@@ -32,10 +32,13 @@
 #include <android-base/test_utils.h>
 #include <gtest/gtest.h>
 
-#include "Memory.h"
+#include <unwindstack/Memory.h>
+
 #include "MemoryFake.h"
 #include "Symbols.h"
 
+namespace unwindstack {
+
 template <typename TypeParam>
 class SymbolsTest : public ::testing::Test {
  protected:
@@ -333,3 +336,5 @@
 
 typedef ::testing::Types<Elf32_Sym, Elf64_Sym> SymbolsTestTypes;
 INSTANTIATE_TYPED_TEST_CASE_P(, SymbolsTest, SymbolsTestTypes);
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tests/UnwindTest.cpp b/libunwindstack/tests/UnwindTest.cpp
index 7497b65..72065c9 100644
--- a/libunwindstack/tests/UnwindTest.cpp
+++ b/libunwindstack/tests/UnwindTest.cpp
@@ -31,12 +31,14 @@
 #include <string>
 #include <thread>
 
-#include "Elf.h"
-#include "MapInfo.h"
-#include "Maps.h"
-#include "Memory.h"
-#include "Regs.h"
-#include "RegsGetLocal.h"
+#include <unwindstack/Elf.h>
+#include <unwindstack/MapInfo.h>
+#include <unwindstack/Maps.h>
+#include <unwindstack/Memory.h>
+#include <unwindstack/Regs.h>
+#include <unwindstack/RegsGetLocal.h>
+
+namespace unwindstack {
 
 static std::atomic_bool g_ready(false);
 static volatile bool g_ready_for_remote = false;
@@ -71,7 +73,7 @@
     ASSERT_TRUE(map_info != nullptr) << ErrorMsg(function_names, function_name_index, unwind_stream);
 
     Elf* elf = map_info->GetElf(pid, true);
-    uint64_t rel_pc = regs->GetRelPc(elf, map_info);
+    uint64_t rel_pc = elf->GetRelPc(regs->pc(), map_info);
     uint64_t adjusted_rel_pc = rel_pc;
     if (frame_num != 0) {
       adjusted_rel_pc = regs->GetAdjustedPc(rel_pc, elf);
@@ -210,7 +212,7 @@
 
   // Wait for context data.
   void* ucontext;
-  for (size_t i = 0; i < 200; i++) {
+  for (size_t i = 0; i < 2000; i++) {
     ucontext = reinterpret_cast<void*>(g_ucontext.load());
     if (ucontext != nullptr) {
       break;
@@ -231,3 +233,5 @@
   g_finish = true;
   thread.join();
 }
+
+}  // namespace unwindstack
diff --git a/libunwindstack/tools/unwind.cpp b/libunwindstack/tools/unwind.cpp
new file mode 100644
index 0000000..642105a
--- /dev/null
+++ b/libunwindstack/tools/unwind.cpp
@@ -0,0 +1,162 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <elf.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <signal.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ptrace.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <string>
+
+#include <unwindstack/Elf.h>
+#include <unwindstack/MapInfo.h>
+#include <unwindstack/Maps.h>
+#include <unwindstack/Memory.h>
+#include <unwindstack/Regs.h>
+
+static bool Attach(pid_t pid) {
+  if (ptrace(PTRACE_ATTACH, pid, 0, 0) == -1) {
+    return false;
+  }
+
+  // Allow at least 1 second to attach properly.
+  for (size_t i = 0; i < 1000; i++) {
+    siginfo_t si;
+    if (ptrace(PTRACE_GETSIGINFO, pid, 0, &si) == 0) {
+      return true;
+    }
+    usleep(1000);
+  }
+  printf("%d: Failed to stop.\n", pid);
+  return false;
+}
+
+static bool Detach(pid_t pid) {
+  return ptrace(PTRACE_DETACH, pid, 0, 0) == 0;
+}
+
+void DoUnwind(pid_t pid) {
+  unwindstack::RemoteMaps remote_maps(pid);
+  if (!remote_maps.Parse()) {
+    printf("Failed to parse map data.\n");
+    return;
+  }
+
+  uint32_t machine_type;
+  unwindstack::Regs* regs = unwindstack::Regs::RemoteGet(pid, &machine_type);
+  if (regs == nullptr) {
+    printf("Unable to get remote reg data\n");
+    return;
+  }
+
+  bool bits32 = true;
+  printf("ABI: ");
+  switch (machine_type) {
+    case EM_ARM:
+      printf("arm");
+      break;
+    case EM_386:
+      printf("x86");
+      break;
+    case EM_AARCH64:
+      printf("arm64");
+      bits32 = false;
+      break;
+    case EM_X86_64:
+      printf("x86_64");
+      bits32 = false;
+      break;
+    default:
+      printf("unknown\n");
+      return;
+  }
+  printf("\n");
+
+  unwindstack::MemoryRemote remote_memory(pid);
+  for (size_t frame_num = 0; frame_num < 64; frame_num++) {
+    if (regs->pc() == 0) {
+      break;
+    }
+    unwindstack::MapInfo* map_info = remote_maps.Find(regs->pc());
+    if (map_info == nullptr) {
+      printf("Failed to find map data for the pc\n");
+      break;
+    }
+
+    unwindstack::Elf* elf = map_info->GetElf(pid, true);
+
+    uint64_t rel_pc = elf->GetRelPc(regs->pc(), map_info);
+    uint64_t adjusted_rel_pc = rel_pc;
+    // Don't need to adjust the first frame pc.
+    if (frame_num != 0) {
+      adjusted_rel_pc = regs->GetAdjustedPc(rel_pc, elf);
+    }
+
+    std::string name;
+    if (bits32) {
+      printf("  #%02zu pc %08" PRIx64, frame_num, adjusted_rel_pc);
+    } else {
+      printf("  #%02zu pc %016" PRIx64, frame_num, adjusted_rel_pc);
+    }
+    if (!map_info->name.empty()) {
+      printf("  %s", map_info->name.c_str());
+      if (map_info->elf_offset != 0) {
+        printf(" (offset 0x%" PRIx64 ")", map_info->elf_offset);
+      }
+    } else {
+      printf("  <anonymous:%" PRIx64 ">", map_info->offset);
+    }
+    uint64_t func_offset;
+    if (elf->GetFunctionName(adjusted_rel_pc, &name, &func_offset)) {
+      printf(" (%s", name.c_str());
+      if (func_offset != 0) {
+        printf("+%" PRId64, func_offset);
+      }
+      printf(")");
+    }
+    printf("\n");
+
+    if (!elf->Step(rel_pc + map_info->elf_offset, regs, &remote_memory)) {
+      break;
+    }
+  }
+}
+
+int main(int argc, char** argv) {
+  if (argc != 2) {
+    printf("Usage: unwind <PID>\n");
+    return 1;
+  }
+
+  pid_t pid = atoi(argv[1]);
+  if (!Attach(pid)) {
+    printf("Failed to attach to pid %d: %s\n", pid, strerror(errno));
+    return 1;
+  }
+
+  DoUnwind(pid);
+
+  Detach(pid);
+
+  return 0;
+}
diff --git a/libunwindstack/unwind_info.cpp b/libunwindstack/tools/unwind_info.cpp
similarity index 92%
rename from libunwindstack/unwind_info.cpp
rename to libunwindstack/tools/unwind_info.cpp
index da1522b..66a9439 100644
--- a/libunwindstack/unwind_info.cpp
+++ b/libunwindstack/tools/unwind_info.cpp
@@ -21,17 +21,20 @@
 #include <stdio.h>
 #include <string.h>
 #include <sys/mman.h>
-#include <sys/types.h>
 #include <sys/stat.h>
+#include <sys/types.h>
 #include <unistd.h>
 
+#include <unwindstack/DwarfSection.h>
+#include <unwindstack/DwarfStructs.h>
+#include <unwindstack/Elf.h>
+#include <unwindstack/ElfInterface.h>
+#include <unwindstack/Log.h>
+
 #include "ArmExidx.h"
-#include "DwarfSection.h"
-#include "DwarfStructs.h"
-#include "Elf.h"
-#include "ElfInterface.h"
 #include "ElfInterfaceArm.h"
-#include "Log.h"
+
+namespace unwindstack {
 
 void DumpArm(ElfInterfaceArm* interface) {
   if (interface == nullptr) {
@@ -100,31 +103,12 @@
   }
 }
 
-int main(int argc, char** argv) {
-  if (argc != 2) {
-    printf("Need to pass the name of an elf file to the program.\n");
-    return 1;
-  }
-
-  struct stat st;
-  if (stat(argv[1], &st) == -1) {
-    printf("Cannot stat %s: %s\n", argv[1], strerror(errno));
-    return 1;
-  }
-  if (!S_ISREG(st.st_mode)) {
-    printf("%s is not a regular file.\n", argv[1]);
-    return 1;
-  }
-  if (S_ISDIR(st.st_mode)) {
-    printf("%s is a directory.\n", argv[1]);
-    return 1;
-  }
-
+int GetElfInfo(const char* file) {
   // Send all log messages to stdout.
   log_to_stdout(true);
 
   MemoryFileAtOffset* memory = new MemoryFileAtOffset;
-  if (!memory->Init(argv[1], 0)) {
+  if (!memory->Init(file, 0)) {
     // Initializatation failed.
     printf("Failed to init\n");
     return 1;
@@ -132,7 +116,7 @@
 
   Elf elf(memory);
   if (!elf.Init() || !elf.valid()) {
-    printf("%s is not a valid elf file.\n", argv[1]);
+    printf("%s is not a valid elf file.\n", file);
     return 1;
   }
 
@@ -177,3 +161,24 @@
 
   return 0;
 }
+
+}  // namespace unwindstack
+
+int main(int argc, char** argv) {
+  if (argc != 2) {
+    printf("Need to pass the name of an elf file to the program.\n");
+    return 1;
+  }
+
+  struct stat st;
+  if (stat(argv[1], &st) == -1) {
+    printf("Cannot stat %s: %s\n", argv[1], strerror(errno));
+    return 1;
+  }
+  if (!S_ISREG(st.st_mode)) {
+    printf("%s is not a regular file.\n", argv[1]);
+    return 1;
+  }
+
+  return unwindstack::GetElfInfo(argv[1]);
+}
diff --git a/libunwindstack/tools/unwind_symbols.cpp b/libunwindstack/tools/unwind_symbols.cpp
new file mode 100644
index 0000000..b757c1e
--- /dev/null
+++ b/libunwindstack/tools/unwind_symbols.cpp
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <elf.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <unwindstack/Elf.h>
+#include <unwindstack/Log.h>
+#include <unwindstack/Memory.h>
+
+int main(int argc, char** argv) {
+  if (argc != 2) {
+    printf("Need to pass the name of an elf file to the program.\n");
+    return 1;
+  }
+
+  struct stat st;
+  if (stat(argv[1], &st) == -1) {
+    printf("Cannot stat %s: %s\n", argv[1], strerror(errno));
+    return 1;
+  }
+  if (!S_ISREG(st.st_mode)) {
+    printf("%s is not a regular file.\n", argv[1]);
+    return 1;
+  }
+
+  // Send all log messages to stdout.
+  unwindstack::log_to_stdout(true);
+
+  unwindstack::MemoryFileAtOffset* memory = new unwindstack::MemoryFileAtOffset;
+  if (!memory->Init(argv[1], 0)) {
+    printf("Failed to init\n");
+    return 1;
+  }
+
+  unwindstack::Elf elf(memory);
+  if (!elf.Init() || !elf.valid()) {
+    printf("%s is not a valid elf file.\n", argv[1]);
+    return 1;
+  }
+
+  switch (elf.machine_type()) {
+    case EM_ARM:
+      printf("ABI: arm\n");
+      break;
+    case EM_AARCH64:
+      printf("ABI: arm64\n");
+      break;
+    case EM_386:
+      printf("ABI: x86\n");
+      break;
+    case EM_X86_64:
+      printf("ABI: x86_64\n");
+      break;
+    default:
+      printf("ABI: unknown\n");
+      return 1;
+  }
+
+  // This is a crude way to get the symbols in order.
+  std::string name;
+  uint64_t load_bias = elf.interface()->load_bias();
+  for (const auto& entry : elf.interface()->pt_loads()) {
+    uint64_t start = entry.second.offset + load_bias;
+    uint64_t end = entry.second.table_size + load_bias;
+    for (uint64_t addr = start; addr < end; addr += 4) {
+      std::string cur_name;
+      uint64_t func_offset;
+      if (elf.GetFunctionName(addr, &cur_name, &func_offset)) {
+        if (cur_name != name) {
+          printf("<0x%" PRIx64 "> Function: %s\n", addr - func_offset, cur_name.c_str());
+        }
+        name = cur_name;
+      }
+    }
+  }
+
+  return 0;
+}
diff --git a/logcat/logcat.cpp b/logcat/logcat.cpp
index e9ef9cc..f64196f 100644
--- a/logcat/logcat.cpp
+++ b/logcat/logcat.cpp
@@ -1638,7 +1638,7 @@
                 logcat_panic(context, HELP_FALSE, "read: unexpected length.\n");
                 break;
             }
-            logcat_panic(context, HELP_FALSE, "logcat read failure");
+            logcat_panic(context, HELP_FALSE, "logcat read failure\n");
             break;
         }
 
diff --git a/rootdir/init.rc b/rootdir/init.rc
index d3a1d17..9301743 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -376,6 +376,20 @@
 
     # create basic filesystem structure
     mkdir /data/misc 01771 system misc
+    mkdir /data/misc/recovery 0770 system log
+    copy /data/misc/recovery/default.prop /data/misc/recovery/default.prop.1
+    chmod 0440 /data/misc/recovery/default.prop.1
+    chown system log /data/misc/recovery/default.prop.1
+    copy /default.prop /data/misc/recovery/default.prop
+    chmod 0440 /data/misc/recovery/default.prop
+    chown system log /data/misc/recovery/default.prop
+    mkdir /data/misc/recovery/proc 0770 system log
+    copy /data/misc/recovery/proc/version /data/misc/recovery/proc/version.1
+    chmod 0440 /data/misc/recovery/proc/version.1
+    chown system log /data/misc/recovery/proc/version.1
+    copy /proc/version /data/misc/recovery/proc/version
+    chmod 0440 /data/misc/recovery/proc/version
+    chown system log /data/misc/recovery/proc/version
     mkdir /data/misc/bluedroid 02770 bluetooth bluetooth
     # Fix the access permissions and group ownership for 'bt_config.conf'
     chmod 0660 /data/misc/bluedroid/bt_config.conf