Fix the fuzzers

test/core/client_channel/uri_fuzzer_test.cc

@@ -28,7 +28,7 @@
 bool squelch = true;
 bool leak_check = true;
 
-int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   char* s = static_cast<char*>(gpr_malloc(size + 1));
   memcpy(s, data, size);
   s[size] = 0;

test/core/end2end/fuzzers/api_fuzzer.cc

@@ -740,7 +740,7 @@ static validator* make_finished_batch_validator(call_state* cs,
   return create_validator(finished_batch, bi);
 }
 
-int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   grpc_test_only_set_slice_hash_seed(0);
   char* grpc_trace_fuzzer = gpr_getenv("GRPC_TRACE_FUZZER");
   if (squelch && grpc_trace_fuzzer == nullptr) gpr_set_log_function(dont_log);

test/core/end2end/fuzzers/client_fuzzer.cc

@@ -37,7 +37,7 @@ static void* tag(int n) { return (void*)(uintptr_t)n; }
 
 static void dont_log(gpr_log_func_args* args) {}
 
-int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   grpc_test_only_set_slice_hash_seed(0);
   struct grpc_memory_counters counters;
   if (squelch) gpr_set_log_function(dont_log);

test/core/end2end/fuzzers/server_fuzzer.cc

@@ -35,7 +35,7 @@ static int detag(void* p) { return (int)(uintptr_t)p; }
 
 static void dont_log(gpr_log_func_args* args) {}
 
-int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   grpc_test_only_set_slice_hash_seed(0);
   struct grpc_memory_counters counters;
   if (squelch) gpr_set_log_function(dont_log);

test/core/http/request_fuzzer.cc

@@ -27,7 +27,7 @@
 bool squelch = true;
 bool leak_check = true;
 
-int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   grpc_http_parser parser;
   grpc_http_request request;
   memset(&request, 0, sizeof(request));

test/core/http/response_fuzzer.cc

@@ -26,7 +26,7 @@
 bool squelch = true;
 bool leak_check = true;
 
-int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   grpc_http_parser parser;
   grpc_http_response response;
   memset(&response, 0, sizeof(response));

test/core/json/fuzzer.cc

@@ -29,7 +29,7 @@
 bool squelch = true;
 bool leak_check = true;
 
-int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   char* s;
   struct grpc_memory_counters counters;
   grpc_memory_counters_init();

test/core/nanopb/fuzzer_response.cc

@@ -28,7 +28,7 @@ bool leak_check = true;
 
 static void dont_log(gpr_log_func_args* args) {}
 
-int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   if (squelch) gpr_set_log_function(dont_log);
   grpc_slice slice = grpc_slice_from_copied_buffer((const char*)data, size);
   grpc_grpclb_initial_response* response;

test/core/nanopb/fuzzer_serverlist.cc

@@ -28,7 +28,7 @@ bool leak_check = true;
 
 static void dont_log(gpr_log_func_args* args) {}
 
-int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   if (squelch) gpr_set_log_function(dont_log);
   grpc_slice slice = grpc_slice_from_copied_buffer((const char*)data, size);
   grpc_grpclb_serverlist* serverlist;

test/core/security/ssl_server_fuzzer.cc

@@ -51,7 +51,7 @@ static void on_handshake_done(grpc_exec_ctx* exec_ctx, void* arg,
   GPR_ASSERT(error != GRPC_ERROR_NONE);
 }
 
-int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   struct grpc_memory_counters counters;
   if (squelch) gpr_set_log_function(dont_log);
   if (leak_check) grpc_memory_counters_init();

test/core/slice/percent_decode_fuzzer.cc

@@ -29,7 +29,7 @@
 bool squelch = true;
 bool leak_check = true;
 
-int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   struct grpc_memory_counters counters;
   grpc_memory_counters_init();
   grpc_slice input = grpc_slice_from_copied_buffer((const char*)data, size);

test/core/slice/percent_encode_fuzzer.cc

@@ -51,7 +51,7 @@ static void test(const uint8_t* data, size_t size, const uint8_t* dict) {
   GPR_ASSERT(counters.total_size_relative == 0);
 }
 
-int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   test(data, size, grpc_url_percent_encoding_unreserved_bytes);
   test(data, size, grpc_compatible_percent_encoding_unreserved_bytes);
   return 0;

test/core/transport/chttp2/hpack_parser_fuzzer_test.cc

@@ -34,7 +34,7 @@ static void onhdr(grpc_exec_ctx* exec_ctx, void* ud, grpc_mdelem md) {
 }
 static void dont_log(gpr_log_func_args* args) {}
 
-int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   grpc_test_only_set_slice_hash_seed(0);
   if (squelch) gpr_set_log_function(dont_log);
   grpc_init();

test/core/util/fuzzer_corpus_test.cc

@@ -28,7 +28,7 @@
 #include "src/core/lib/iomgr/load_file.h"
 #include "test/core/util/test_config.h"
 
-int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size);
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size);
 extern bool squelch;
 extern bool leak_check;
 

test/core/util/one_corpus_entry_fuzzer.cc

@@ -21,7 +21,7 @@
 #include <grpc/support/log.h>
 #include "src/core/lib/iomgr/load_file.h"
 
-int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size);
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size);
 
 extern bool squelch;
 extern bool leak_check;