--- a/src/hotspot/share/classfile/classLoader.cpp	Fri Oct 26 11:11:13 2018 +0800
+++ b/src/hotspot/share/classfile/classLoader.cpp	Thu Oct 25 21:40:17 2018 -0700
@@ -1471,16 +1471,16 @@
     // if no protocol prefix is found, path is the same as stream->source()
     char* path = skip_uri_protocol(src);
     char* canonical_class_src_path = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, JVM_MAXPATHLEN);
-    if (!get_canonical_path(path, canonical_class_src_path, JVM_MAXPATHLEN)) {
-      tty->print_cr("Bad pathname %s. CDS dump aborted.", path);
-      vm_exit(1);
-    }
+    bool success = get_canonical_path(path, canonical_class_src_path, JVM_MAXPATHLEN);
+    // The path is from the ClassFileStream. Since a ClassFileStream has been created successfully in functions
+    // such as ClassLoader::load_class(), its source path must be valid.
+    assert(success, "must be valid path");
     for (int i = 0; i < FileMapInfo::get_number_of_shared_paths(); i++) {
       SharedClassPathEntry* ent = FileMapInfo::shared_path(i);
-      if (!get_canonical_path(ent->name(), canonical_path_table_entry, JVM_MAXPATHLEN)) {
-        tty->print_cr("Bad pathname %s. CDS dump aborted.", ent->name());
-        vm_exit(1);
-      }
+      success = get_canonical_path(ent->name(), canonical_path_table_entry, JVM_MAXPATHLEN);
+      // A shared path has been validated during its creation in ClassLoader::create_class_path_entry(),
+      // it must be valid here.
+      assert(success, "must be valid path");
       // If the path (from the class stream source) is the same as the shared
       // class or module path, then we have a match.
       if (strcmp(canonical_path_table_entry, canonical_class_src_path) == 0) {

--- a/src/hotspot/share/classfile/classLoaderExt.cpp	Fri Oct 26 11:11:13 2018 +0800
+++ b/src/hotspot/share/classfile/classLoaderExt.cpp	Thu Oct 25 21:40:17 2018 -0700
@@ -175,8 +175,7 @@
   }
 
   if (strstr(manifest, "Extension-List:") != NULL) {
-    tty->print_cr("-Xshare:dump does not support Extension-List in JAR manifest: %s", entry->name());
-    vm_exit(1);
+    vm_exit_during_cds_dumping(err_msg("-Xshare:dump does not support Extension-List in JAR manifest: %s", entry->name()));
   }
 
   char* cp_attr = get_class_path_attr(entry->name(), manifest, manifest_size);

--- a/src/hotspot/share/memory/metaspace.cpp	Fri Oct 26 11:11:13 2018 +0800
+++ b/src/hotspot/share/memory/metaspace.cpp	Thu Oct 25 21:40:17 2018 -0700
@@ -1291,10 +1291,9 @@
     if (DumpSharedSpaces) {
       // CDS dumping keeps loading classes, so if we hit an OOM we probably will keep hitting OOM.
       // We should abort to avoid generating a potentially bad archive.
-      tty->print_cr("Failed allocating metaspace object type %s of size " SIZE_FORMAT ". CDS dump aborted.",
-          MetaspaceObj::type_name(type), word_size * BytesPerWord);
-      tty->print_cr("Please increase MaxMetaspaceSize (currently " SIZE_FORMAT " bytes).", MaxMetaspaceSize);
-      vm_exit(1);
+      vm_exit_during_cds_dumping(err_msg("Failed allocating metaspace object type %s of size " SIZE_FORMAT ". CDS dump aborted.",
+          MetaspaceObj::type_name(type), word_size * BytesPerWord),
+        err_msg("Please increase MaxMetaspaceSize (currently " SIZE_FORMAT " bytes).", MaxMetaspaceSize));
     }
     report_metadata_oome(loader_data, word_size, type, mdtype, THREAD);
     assert(HAS_PENDING_EXCEPTION, "sanity");

--- a/src/hotspot/share/memory/metaspaceShared.cpp	Fri Oct 26 11:11:13 2018 +0800
+++ b/src/hotspot/share/memory/metaspaceShared.cpp	Thu Oct 25 21:40:17 2018 -0700
@@ -1646,12 +1646,11 @@
     } while (check_closure.made_progress());
 
     if (IgnoreUnverifiableClassesDuringDump) {
-      // This is useful when running JCK or SQE tests. You should not
-      // enable this when running real apps.
+      // IgnoreUnverifiableClassesDuringDump is enabled by default.
+      // Unverifiable classes will not be included in the CDS archive.
       SystemDictionary::remove_classes_in_error_state();
     } else {
-      tty->print_cr("Please remove the unverifiable classes from your class list and try again");
-      exit(1);
+      vm_exit_during_cds_dumping("Please remove the unverifiable classes from your class list and try again");
     }
   }
 }

--- a/src/hotspot/share/runtime/java.cpp	Fri Oct 26 11:11:13 2018 +0800
+++ b/src/hotspot/share/runtime/java.cpp	Thu Oct 25 21:40:17 2018 -0700
@@ -609,6 +609,26 @@
   ShouldNotReachHere();
 }
 
+void vm_notify_during_cds_dumping(const char* error, const char* message) {
+  if (error != NULL) {
+    tty->print_cr("Error occurred during CDS dumping");
+    tty->print("%s", error);
+    if (message != NULL) {
+      tty->print_cr(": %s", message);
+    }
+    else {
+      tty->cr();
+    }
+  }
+}
+
+void vm_exit_during_cds_dumping(const char* error, const char* message) {
+  vm_notify_during_cds_dumping(error, message);
+
+  // Failure during CDS dumping, we don't want to dump core
+  vm_abort(false);
+}
+
 void vm_notify_during_shutdown(const char* error, const char* message) {
   if (error != NULL) {
     tty->print_cr("Error occurred during initialization of VM");

--- a/src/hotspot/share/runtime/java.hpp	Fri Oct 26 11:11:13 2018 +0800
+++ b/src/hotspot/share/runtime/java.hpp	Thu Oct 25 21:40:17 2018 -0700
@@ -51,6 +51,8 @@
 extern void vm_exit_during_initialization(const char* error, const char* message = NULL);
 extern void vm_shutdown_during_initialization(const char* error, const char* message = NULL);
 
+extern void vm_exit_during_cds_dumping(const char* error, const char* message = NULL);
+
 /**
  * With the integration of the changes to handle the version string
  * as defined by JEP-223, most of the code related to handle the version