Merge pull request #8422 from haberman/sync-stage

Integrate from Piper for C++, Java, and Python

CHANGES.txt

@@ -9,9 +9,32 @@ Unreleased Changes (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
   * For iterator-pair function parameter types, take both iterators by value.
   * Code-space savings and perhaps some modest performance improvements in
     RepeatedPtrField.
+  * Eliminate nullptr check from every tag parse.
+  * Remove unused _$name$_cached_byte_size_ fields.
+  * Serialize extension ranges together when not broken by a proto field in the
+    middle.
+  * Do out-of-line allocation and deallocation of string object in ArenaString.
+  * Streamline ParseContext::ParseMessage<T> to avoid code bloat and improve
+    performance.
+  * New member functions RepeatedField::Assign, RepeatedPtrField::{Add, Assign}.
+  * Fix undefined behavior warning due to innocuous uninitialization of value
+    on an error path.
+  * Avoid expensive inlined code space for encoding message length for messages
+    >= 128 bytes and instead do a procedure call to a shared out-of-line routine.
 
   Java:
-  * Exceptions thrown while reading from an InputStream in parseFrom are now included as causes.
+  * Exceptions thrown while reading from an InputStream in parseFrom are now
+    included as causes.
+  * Support potentially more efficient proto parsing from RopeByteStrings.
+  * Clarify runtime of ByteString.Output.toStringBuffer().
+
+  Python
+  * Fixed a bug in text format where a trailing colon was printed for repeated field.
+  * When TextFormat encounters a duplicate message map key, replace the current
+    one instead of merging.
+
+  JavaScript
+  * Make Any.pack() chainable.
 
 2021-03-10 version 3.15.6 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
 

Makefile.am

@@ -529,7 +529,6 @@ java_EXTRA_DIST=
   java/core/src/test/proto/com/google/protobuf/test_check_utf8.proto               \
   java/core/src/test/proto/com/google/protobuf/test_check_utf8_size.proto          \
   java/core/src/test/proto/com/google/protobuf/test_custom_options.proto           \
-  java/core/src/test/proto/com/google/protobuf/test_extra_interfaces.proto         \
   java/core/src/test/proto/com/google/protobuf/wrappers_test.proto                 \
   java/lite.md                                                                     \
   java/lite/BUILD                                                                  \

conformance/text_format_conformance_suite.cc

@@ -451,6 +451,27 @@ void TextFormatConformanceTestSuite::RunSuiteImpl() {
       }
       )",
                                     prototype);
+
+  prototype.Clear();
+  ConformanceRequestSetting setting_map(
+      REQUIRED, conformance::TEXT_FORMAT, conformance::PROTOBUF,
+      conformance::TEXT_FORMAT_TEST, prototype, "DuplicateMapKey", R"(
+      map_string_nested_message {
+        key: "duplicate"
+        value: { a: 123 }
+      }
+      map_string_nested_message {
+        key: "duplicate"
+        value: { corecursive: {} }
+      }
+      )");
+  // The last-specified value will be retained in a parsed map
+  RunValidInputTest(setting_map, R"(
+      map_string_nested_message {
+        key: "duplicate"
+        value: { corecursive: {} }
+      }
+      )");
 }
 
 }  // namespace protobuf

csharp/src/Google.Protobuf/Reflection/Descriptor.cs

@@ -107,57 +107,58 @@ public static partial class DescriptorReflection {
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             "CzIkLmdvb2dsZS5wcm90b2J1Zi5VbmludGVycHJldGVkT3B0aW9uIjoKDE9w",
             "dGltaXplTW9kZRIJCgVTUEVFRBABEg0KCUNPREVfU0laRRACEhAKDExJVEVf",
-            "UlVOVElNRRADKgkI6AcQgICAgAJKBAgmECci8gEKDk1lc3NhZ2VPcHRpb25z",
+            "UlVOVElNRRADKgkI6AcQgICAgAJKBAgmECcihAIKDk1lc3NhZ2VPcHRpb25z",
             "EiYKF21lc3NhZ2Vfc2V0X3dpcmVfZm9ybWF0GAEgASgIOgVmYWxzZRIuCh9u",
             "b19zdGFuZGFyZF9kZXNjcmlwdG9yX2FjY2Vzc29yGAIgASgIOgVmYWxzZRIZ",
             "CgpkZXByZWNhdGVkGAMgASgIOgVmYWxzZRIRCgltYXBfZW50cnkYByABKAgS",
             "QwoUdW5pbnRlcnByZXRlZF9vcHRpb24Y5wcgAygLMiQuZ29vZ2xlLnByb3Rv",
-            "YnVmLlVuaW50ZXJwcmV0ZWRPcHRpb24qCQjoBxCAgICAAkoECAgQCUoECAkQ",
-            "CiKeAwoMRmllbGRPcHRpb25zEjoKBWN0eXBlGAEgASgOMiMuZ29vZ2xlLnBy",
-            "b3RvYnVmLkZpZWxkT3B0aW9ucy5DVHlwZToGU1RSSU5HEg4KBnBhY2tlZBgC",
-            "IAEoCBI/CgZqc3R5cGUYBiABKA4yJC5nb29nbGUucHJvdG9idWYuRmllbGRP",
-            "cHRpb25zLkpTVHlwZToJSlNfTk9STUFMEhMKBGxhenkYBSABKAg6BWZhbHNl",
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-            "RxAAEggKBENPUkQQARIQCgxTVFJJTkdfUElFQ0UQAiI1CgZKU1R5cGUSDQoJ",
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-            "YWxpYXMYAiABKAgSGQoKZGVwcmVjYXRlZBgDIAEoCDoFZmFsc2USQwoUdW5p",
-            "bnRlcnByZXRlZF9vcHRpb24Y5wcgAygLMiQuZ29vZ2xlLnByb3RvYnVmLlVu",
-            "aW50ZXJwcmV0ZWRPcHRpb24qCQjoBxCAgICAAkoECAUQBiJ9ChBFbnVtVmFs",
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-            "ZXJwcmV0ZWRfb3B0aW9uGOcHIAMoCzIkLmdvb2dsZS5wcm90b2J1Zi5Vbmlu",
-            "dGVycHJldGVkT3B0aW9uKgkI6AcQgICAgAIiewoOU2VydmljZU9wdGlvbnMS",
-            "GQoKZGVwcmVjYXRlZBghIAEoCDoFZmFsc2USQwoUdW5pbnRlcnByZXRlZF9v",
-            "cHRpb24Y5wcgAygLMiQuZ29vZ2xlLnByb3RvYnVmLlVuaW50ZXJwcmV0ZWRP",
-            "cHRpb24qCQjoBxCAgICAAiKtAgoNTWV0aG9kT3B0aW9ucxIZCgpkZXByZWNh",
-            "dGVkGCEgASgIOgVmYWxzZRJfChFpZGVtcG90ZW5jeV9sZXZlbBgiIAEoDjIv",
-            "Lmdvb2dsZS5wcm90b2J1Zi5NZXRob2RPcHRpb25zLklkZW1wb3RlbmN5TGV2",
-            "ZWw6E0lERU1QT1RFTkNZX1VOS05PV04SQwoUdW5pbnRlcnByZXRlZF9vcHRp",
-            "b24Y5wcgAygLMiQuZ29vZ2xlLnByb3RvYnVmLlVuaW50ZXJwcmV0ZWRPcHRp",
-            "b24iUAoQSWRlbXBvdGVuY3lMZXZlbBIXChNJREVNUE9URU5DWV9VTktOT1dO",
-            "EAASEwoPTk9fU0lERV9FRkZFQ1RTEAESDgoKSURFTVBPVEVOVBACKgkI6AcQ",
-            "gICAgAIingIKE1VuaW50ZXJwcmV0ZWRPcHRpb24SOwoEbmFtZRgCIAMoCzIt",
-            "Lmdvb2dsZS5wcm90b2J1Zi5VbmludGVycHJldGVkT3B0aW9uLk5hbWVQYXJ0",
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-            "bHVlGAQgASgEEhoKEm5lZ2F0aXZlX2ludF92YWx1ZRgFIAEoAxIUCgxkb3Vi",
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-            "Z2F0ZV92YWx1ZRgIIAEoCRozCghOYW1lUGFydBIRCgluYW1lX3BhcnQYASAC",
-            "KAkSFAoMaXNfZXh0ZW5zaW9uGAIgAigIItUBCg5Tb3VyY2VDb2RlSW5mbxI6",
-            "Cghsb2NhdGlvbhgBIAMoCzIoLmdvb2dsZS5wcm90b2J1Zi5Tb3VyY2VDb2Rl",
-            "SW5mby5Mb2NhdGlvbhqGAQoITG9jYXRpb24SEAoEcGF0aBgBIAMoBUICEAES",
-            "EAoEc3BhbhgCIAMoBUICEAESGAoQbGVhZGluZ19jb21tZW50cxgDIAEoCRIZ",
-            "ChF0cmFpbGluZ19jb21tZW50cxgEIAEoCRIhChlsZWFkaW5nX2RldGFjaGVk",
-            "X2NvbW1lbnRzGAYgAygJIqcBChFHZW5lcmF0ZWRDb2RlSW5mbxJBCgphbm5v",
-            "dGF0aW9uGAEgAygLMi0uZ29vZ2xlLnByb3RvYnVmLkdlbmVyYXRlZENvZGVJ",
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-            "ARITCgtzb3VyY2VfZmlsZRgCIAEoCRINCgViZWdpbhgDIAEoBRILCgNlbmQY",
-            "BCABKAVCfgoTY29tLmdvb2dsZS5wcm90b2J1ZkIQRGVzY3JpcHRvclByb3Rv",
-            "c0gBWi1nb29nbGUuZ29sYW5nLm9yZy9wcm90b2J1Zi90eXBlcy9kZXNjcmlw",
-            "dG9ycGL4AQGiAgNHUEKqAhpHb29nbGUuUHJvdG9idWYuUmVmbGVjdGlvbg=="));
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+            "BkoECAYQB0oECAgQCUoECAkQCiKeAwoMRmllbGRPcHRpb25zEjoKBWN0eXBl",
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+            "Z19jb21tZW50cxgDIAEoCRIZChF0cmFpbGluZ19jb21tZW50cxgEIAEoCRIh",
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+            "ZWRDb2RlSW5mbxJBCgphbm5vdGF0aW9uGAEgAygLMi0uZ29vZ2xlLnByb3Rv",
+            "YnVmLkdlbmVyYXRlZENvZGVJbmZvLkFubm90YXRpb24aTwoKQW5ub3RhdGlv",
+            "bhIQCgRwYXRoGAEgAygFQgIQARITCgtzb3VyY2VfZmlsZRgCIAEoCRINCgVi",
+            "ZWdpbhgDIAEoBRILCgNlbmQYBCABKAVCfgoTY29tLmdvb2dsZS5wcm90b2J1",
+            "ZkIQRGVzY3JpcHRvclByb3Rvc0gBWi1nb29nbGUuZ29sYW5nLm9yZy9wcm90",
+            "b2J1Zi90eXBlcy9kZXNjcmlwdG9ycGL4AQGiAgNHUEKqAhpHb29nbGUuUHJv",
+            "dG9idWYuUmVmbGVjdGlvbg=="));
       descriptor = pbr::FileDescriptor.FromGeneratedCode(descriptorData,
           new pbr::FileDescriptor[] { },
           new pbr::GeneratedClrTypeInfo(null, null, new pbr::GeneratedClrTypeInfo[] {

java/core/src/main/java/com/google/protobuf/ByteString.java

@@ -1043,8 +1043,10 @@ public synchronized void write(byte[] b, int offset, int length) {
     }
 
     /**
-     * Creates a byte string. Its size is the current size of this output stream and its output has
-     * been copied to it.
+     * Creates a byte string with the size and contents of this output stream. This does not create
+     * a new copy of the underlying bytes. If the stream size grows dynamically, the runtime is
+     * O(log n) in respect to the number of bytes written to the {@link Output}. If the stream size
+     * stays within the initial capacity, the runtime is O(1).
      *
      * @return the current contents of this output stream, as a byte string.
      */

java/core/src/main/java/com/google/protobuf/RopeByteString.java

@@ -603,7 +603,12 @@ protected int partialHash(int h, int offset, int length) {
 
   @Override
   public CodedInputStream newCodedInput() {
-    return CodedInputStream.newInstance(new RopeInputStream());
+    // Passing along direct references to internal ByteBuffers can support more efficient parsing
+    // via aliasing in CodedInputStream for users who wish to use it.
+    //
+    // Otherwise we force data copies, both in copying as an input stream and in buffering in the
+    // CodedInputSteam.
+    return CodedInputStream.newInstance(asReadOnlyByteBufferList(), /* bufferIsImmutable= */ true);
   }
 
   @Override

java/core/src/test/java/com/google/protobuf/AbstractMessageTest.java

@@ -283,7 +283,7 @@ public void testParsingUninitialized() throws Exception {
     Message.Builder abstractMessageBuilder =
         new AbstractMessageWrapper.Builder(TestRequiredForeign.newBuilder());
     // mergeFrom() should not throw initialization error.
-    abstractMessageBuilder.mergeFrom(bytes).buildPartial();
+    Message unused1 = abstractMessageBuilder.mergeFrom(bytes).buildPartial();
     try {
       abstractMessageBuilder.mergeFrom(bytes).build();
       fail();
@@ -295,7 +295,7 @@ public void testParsingUninitialized() throws Exception {
     Message.Builder dynamicMessageBuilder =
         DynamicMessage.newBuilder(TestRequiredForeign.getDescriptor());
     // mergeFrom() should not throw initialization error.
-    dynamicMessageBuilder.mergeFrom(bytes).buildPartial();
+    Message unused2 = dynamicMessageBuilder.mergeFrom(bytes).buildPartial();
     try {
       dynamicMessageBuilder.mergeFrom(bytes).build();
       fail();

java/core/src/test/java/com/google/protobuf/DynamicMessageTest.java

@@ -69,7 +69,7 @@ public void testSettersAfterBuild() throws Exception {
     Message.Builder builder = DynamicMessage.newBuilder(TestAllTypes.getDescriptor());
     Message firstMessage = builder.build();
     // double build()
-    builder.build();
+    Message unused = builder.build();
     // clear() after build()
     builder.clear();
     // setters after build()

java/core/src/test/java/com/google/protobuf/GeneratedMessageTest.java

@@ -76,6 +76,7 @@
  *
  * @author kenton@google.com Kenton Varda
  */
+@SuppressWarnings({"ProtoBuilderReturnValueIgnored", "ReturnValueIgnored"})
 public class GeneratedMessageTest extends TestCase {
   TestUtil.ReflectionTester reflectionTester =
       new TestUtil.ReflectionTester(TestAllTypes.getDescriptor(), null);

java/core/src/test/java/com/google/protobuf/MapForProto2Test.java

@@ -1163,8 +1163,8 @@ public void testMapInitializationOrder() throws Exception {
   }
 
   public void testReservedWordsFieldNames() {
-    ReservedAsMapField.newBuilder().build();
-    ReservedAsMapFieldWithEnumValue.newBuilder().build();
+    ReservedAsMapField unused1 = ReservedAsMapField.newBuilder().build();
+    ReservedAsMapFieldWithEnumValue unused2 = ReservedAsMapFieldWithEnumValue.newBuilder().build();
   }
 
   public void testGetMap() {

java/core/src/test/java/com/google/protobuf/MapTest.java

@@ -1294,8 +1294,8 @@ public void testRemove() {
   }
 
   public void testReservedWordsFieldNames() {
-    ReservedAsMapField.newBuilder().build();
-    ReservedAsMapFieldWithEnumValue.newBuilder().build();
+    ReservedAsMapField unused1 = ReservedAsMapField.newBuilder().build();
+    ReservedAsMapFieldWithEnumValue unused2 = ReservedAsMapFieldWithEnumValue.newBuilder().build();
   }
 
   public void testDeterministicSerialziation() throws Exception {

java/core/src/test/java/com/google/protobuf/TestBadIdentifiers.java

@@ -43,8 +43,10 @@ public class TestBadIdentifiers extends TestCase {
 
   public void testCompilation() {
     // If this compiles, it means the generation was correct.
-    TestBadIdentifiersProto.Deprecated.newBuilder();
-    TestBadIdentifiersProto.Override.newBuilder();
+    TestBadIdentifiersProto.Deprecated unused1 =
+        TestBadIdentifiersProto.Deprecated.newBuilder().build();
+    TestBadIdentifiersProto.Override unused2 =
+        TestBadIdentifiersProto.Override.getDefaultInstance();
   }
 
   public void testGetDescriptor() {

java/core/src/test/java/com/google/protobuf/TestBadIdentifiersLite.java

@@ -45,8 +45,10 @@ public final class TestBadIdentifiersLite extends TestCase {
 
   public void testCompilation() {
     // If this compiles, it means the generation was correct.
-    TestBadIdentifiersProto.Deprecated.newBuilder();
-    TestBadIdentifiersProto.Override.newBuilder();
+    TestBadIdentifiersProto.Deprecated.Builder builder1 =
+        TestBadIdentifiersProto.Deprecated.newBuilder();
+    TestBadIdentifiersProto.Override.Builder builder2 =
+        TestBadIdentifiersProto.Override.newBuilder();
   }
 
   public void testConflictingFieldNames() throws Exception {