Revert deletion of api_fuzzer.cc (#27424)

* Revert "Delete api_fuzzer"

This reverts commit 6f5b4624af.

* Revert "Delete api_fuzzer.cc"

This reverts commit ff8fecb7f2.

* fix some stuff

* more fixes

* more fixes

* compiles

* Automated change: Fix sanity tests

* corpus update

* fixes

* Automated change: Fix sanity tests

* fix illegal term

* fix?

* clear corpora

* cleanup

Co-authored-by: ctiller <ctiller@users.noreply.github.com>

test/core/end2end/fuzzers/BUILD

@@ -20,6 +20,21 @@ licenses(["notice"])  # Apache v2
 
 load("//test/core/util:grpc_fuzzer.bzl", "grpc_fuzzer")
 
+grpc_fuzzer(
+    name = "api_fuzzer",
+    size = "enormous",
+    srcs = ["api_fuzzer.cc"],
+    corpus = "api_fuzzer_corpus",
+    language = "C++",
+    tags = ["no_windows"],
+    deps = [
+        "//:gpr",
+        "//:grpc",
+        "//test/core/end2end:ssl_test_data",
+        "//test/core/util:grpc_test_util",
+    ],
+)
+
 grpc_fuzzer(
     name = "client_fuzzer",
     srcs = ["client_fuzzer.cc"],

test/core/end2end/fuzzers/api_fuzzer.dictionary

@@ -0,0 +1,27 @@
+# tracers
+"api\x00"
+"channel\x00"
+"channel_stack_builder\x00"
+"connectivity_state\x00"
+"flowctl\x00"
+"http\x00"
+"http1\x00"
+"round_robin\x00"
+"secure_endpoint\x00"
+"tcp\x00"
+"transport_security\x00"
+
+# channel args
+"\x00grpc.census\x00"
+"\x00grpc.max_concurrent_streams\x00"
+"\x00grpc.max_message_length\x00"
+"\x00grpc.http2.initial_sequence_number\x00"
+"\x00grpc.http2.lookahead_bytes\x00"
+"\x00grpc.http2.hpack_table_size.decoder\x00"
+"\x00grpc.http2.hpack_table_size.encoder\x00"
+"\x01grpc.default_authority\x00"
+"\x01grpc.primary_user_agent\x00"
+"\x01grpc.secondary_user_agent\x00"
+"\x00grpc.max_reconnect_backoff_ms\x00"
+"\x01grpc.ssl_target_name_override\x00"
+

test/core/end2end/fuzzers/api_fuzzer_corpus/0

@@ -0,0 +1 @@
+

test/core/util/ubsan_suppressions.txt

@@ -21,6 +21,7 @@ enum:grpc_op_string
 signed-integer-overflow:chrono
 enum:grpc_http2_error_to_grpc_status
 enum:grpc_chttp2_cancel_stream
+enum:api_fuzzer
 # TODO(juanlishen): Remove this supression after
 # https://github.com/GoogleCloudPlatform/layer-definitions/issues/531 is
 # addressed.