Update libFuzzer to 19.x

This updates libFuzzer to the latest LLVM version, 19.x. Specifically, commit
`ab51eccf88f5321e7c60591c5546b254b6afab99`.

Author: fitzgen

libfuzzer/FuzzerDriver.cpp

@@ -229,6 +229,7 @@ static void PulseThread() {
 
 static void WorkerThread(const Command &BaseCmd, std::atomic<unsigned> *Counter,
                          unsigned NumJobs, std::atomic<bool> *HasErrors) {
+  ScopedDisableMsanInterceptorChecks S;
   while (true) {
     unsigned C = (*Counter)++;
     if (C >= NumJobs) break;

libfuzzer/FuzzerFork.cpp

@@ -349,7 +349,7 @@ void FuzzWithFork(Random &Rand, const FuzzingOptions &Options,
                         &NewFeatures, Env.Cov, &NewCov, CFPath,
                         /*Verbose=*/false, /*IsSetCoverMerge=*/false);
     Env.Features.insert(NewFeatures.begin(), NewFeatures.end());
-    Env.Cov.insert(NewFeatures.begin(), NewFeatures.end());
+    Env.Cov.insert(NewCov.begin(), NewCov.end());
     RemoveFile(CFPath);
   }
 

libfuzzer/FuzzerUtilFuchsia.cpp

@@ -292,7 +292,7 @@ void CrashHandler() {
     zx_wait_item_t WaitItems[] = {
         {
             .handle = SignalHandlerEvent,
-            .waitfor = ZX_SIGNAL_HANDLE_CLOSED,
+            .waitfor = ZX_USER_SIGNAL_1,
             .pending = 0,
         },
         {
@@ -378,10 +378,11 @@ void CrashHandler() {
 }
 
 void StopSignalHandler() {
-  _zx_handle_close(SignalHandlerEvent);
+  _zx_object_signal(SignalHandlerEvent, 0, ZX_USER_SIGNAL_1);
   if (SignalHandler.joinable()) {
     SignalHandler.join();
   }
+  _zx_handle_close(SignalHandlerEvent);
 }
 
 } // namespace

libfuzzer/FuzzerUtilLinux.cpp

@@ -44,7 +44,7 @@ void SetThreadName(std::thread &thread, const std::string &name) {
 #if LIBFUZZER_LINUX || LIBFUZZER_FREEBSD
   (void)pthread_setname_np(thread.native_handle(), name.c_str());
 #elif LIBFUZZER_NETBSD
-  (void)pthread_set_name_np(thread.native_handle(), "%s", name.c_str());
+  (void)pthread_setname_np(thread.native_handle(), "%s", const_cast<char *>(name.c_str()));
 #endif
 }
 

libfuzzer/FuzzerUtilWindows.cpp

@@ -21,10 +21,15 @@
 #include <signal.h>
 #include <stdio.h>
 #include <sys/types.h>
+// clang-format off
 #include <windows.h>
-
-// This must be included after windows.h.
+// These must be included after windows.h.
+// archicture need to be set before including
+// libloaderapi
+#include <libloaderapi.h>
+#include <stringapiset.h>
 #include <psapi.h>
+// clang-format on
 
 namespace fuzzer {
 
@@ -234,8 +239,25 @@ size_t PageSize() {
 }
 
 void SetThreadName(std::thread &thread, const std::string &name) {
-  // TODO ?
-  // to UTF-8 then SetThreadDescription ?
+#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) ||                                 \
+    defined(_GLIBCXX_GCC_GTHR_POSIX_H)
+  (void)pthread_setname_np(thread.native_handle(), name.c_str());
+#else
+  typedef HRESULT(WINAPI * proc)(HANDLE, PCWSTR);
+  HMODULE kbase = GetModuleHandleA("KernelBase.dll");
+  proc ThreadNameProc =
+      reinterpret_cast<proc>(GetProcAddress(kbase, "SetThreadDescription"));
+  if (ThreadNameProc) {
+    std::wstring buf;
+    auto sz = MultiByteToWideChar(CP_UTF8, 0, name.data(), -1, nullptr, 0);
+    if (sz > 0) {
+      buf.resize(sz);
+      if (MultiByteToWideChar(CP_UTF8, 0, name.data(), -1, &buf[0], sz) > 0) {
+        (void)ThreadNameProc(thread.native_handle(), buf.c_str());
+      }
+    }
+  }
+#endif
 }
 
 } // namespace fuzzer

libfuzzer/build.sh

@@ -2,7 +2,7 @@
 LIBFUZZER_SRC_DIR=$(dirname $0)
 CXX="${CXX:-clang}"
 for f in $LIBFUZZER_SRC_DIR/*.cpp; do
-  $CXX -g -O2 -fno-omit-frame-pointer -std=c++14 $f -c &
+  $CXX -g -O2 -fno-omit-frame-pointer -std=c++17 $f -c &
 done
 wait
 rm -f libFuzzer.a

libfuzzer/tests/CMakeLists.txt

@@ -12,10 +12,10 @@ if (APPLE)
 endif()
 
 add_custom_target(FuzzerUnitTests)
-set_target_properties(FuzzerUnitTests PROPERTIES FOLDER "Compiler-RT Tests")
+set_target_properties(FuzzerUnitTests PROPERTIES FOLDER "Compiler-RT/Tests")
 
 add_custom_target(FuzzedDataProviderUnitTests)
-set_target_properties(FuzzedDataProviderUnitTests PROPERTIES FOLDER "Compiler-RT Tests")
+set_target_properties(FuzzedDataProviderUnitTests PROPERTIES FOLDER "Compiler-RT/Tests")
 
 set(LIBFUZZER_UNITTEST_LINK_FLAGS ${COMPILER_RT_UNITTEST_LINK_FLAGS})
 list(APPEND LIBFUZZER_UNITTEST_LINK_FLAGS --driver-mode=g++)
@@ -58,7 +58,7 @@ if(COMPILER_RT_DEFAULT_TARGET_ARCH IN_LIST FUZZER_SUPPORTED_ARCH)
     ${LIBFUZZER_TEST_RUNTIME_OBJECTS})
   set_target_properties(${LIBFUZZER_TEST_RUNTIME} PROPERTIES
     ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
-    FOLDER "Compiler-RT Runtime tests")
+    FOLDER "Compiler-RT/Tests/Runtime")
 
   if(CMAKE_SYSTEM_NAME STREQUAL "Linux" AND
      COMPILER_RT_LIBCXX_PATH AND
@@ -74,7 +74,7 @@ if(COMPILER_RT_DEFAULT_TARGET_ARCH IN_LIST FUZZER_SUPPORTED_ARCH)
     FuzzerUnitTests "Fuzzer-${arch}-Test" ${arch}
     SOURCES FuzzerUnittest.cpp ${COMPILER_RT_GTEST_SOURCE}
     RUNTIME ${LIBFUZZER_TEST_RUNTIME}
-    DEPS llvm_gtest ${LIBFUZZER_TEST_RUNTIME_DEPS}
+    DEPS ${LIBFUZZER_TEST_RUNTIME_DEPS}
     CFLAGS ${LIBFUZZER_UNITTEST_CFLAGS} ${LIBFUZZER_TEST_RUNTIME_CFLAGS}
     LINK_FLAGS ${LIBFUZZER_UNITTEST_LINK_FLAGS} ${LIBFUZZER_TEST_RUNTIME_LINK_FLAGS})
   set_target_properties(FuzzerUnitTests PROPERTIES
@@ -84,7 +84,7 @@ if(COMPILER_RT_DEFAULT_TARGET_ARCH IN_LIST FUZZER_SUPPORTED_ARCH)
   generate_compiler_rt_tests(FuzzedDataProviderTestObjects
     FuzzedDataProviderUnitTests "FuzzerUtils-${arch}-Test" ${arch}
     SOURCES FuzzedDataProviderUnittest.cpp ${COMPILER_RT_GTEST_SOURCE}
-    DEPS llvm_gtest ${LIBFUZZER_TEST_RUNTIME_DEPS} ${COMPILER_RT_SOURCE_DIR}/include/fuzzer/FuzzedDataProvider.h
+    DEPS ${LIBFUZZER_TEST_RUNTIME_DEPS} ${COMPILER_RT_SOURCE_DIR}/include/fuzzer/FuzzedDataProvider.h
     CFLAGS ${LIBFUZZER_UNITTEST_CFLAGS} ${LIBFUZZER_TEST_RUNTIME_CFLAGS}
     LINK_FLAGS ${LIBFUZZER_UNITTEST_LINK_FLAGS} ${LIBFUZZER_TEST_RUNTIME_LINK_FLAGS})
   set_target_properties(FuzzedDataProviderUnitTests PROPERTIES

update-libfuzzer.sh

@@ -8,7 +8,7 @@ set -ex
 
 # The LLVM commit from which we are vendoring libfuzzer. This must be a commit
 # hash from https://github.com/llvm/llvm-project
-COMMIT=3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff
+COMMIT=ab51eccf88f5321e7c60591c5546b254b6afab99
 
 cd "$(dirname $0)"
 project_dir="$(pwd)"