test: fix toolchain for arm64 hosts (#806)

* test: fix toolchain for arm64 hosts

On arm64 hosts lld-link seems to default to /machine:ARM64 which is incorrect for the cross-compile u
se-case. Set the machine type to x64.

* test: use abort() to fake a crash

__builtin_trap() is caught on ARM64 such that the fuzzing engine cannot act anymore. Use abort() to cause an abnormal program termination.

Author: rjaegers

test/cpp/workspace/clang-cl/toolchain.cmake

@@ -19,4 +19,4 @@ find_program(CMAKE_CXX_COMPILER NAMES clang-cl REQUIRED)
 find_program(CMAKE_AR NAMES llvm-lib REQUIRED)
 
 add_compile_options(--target=x86_64-pc-windows-msvc -fuse-ld=lld /winsdkdir ${WINDOWS_SDK_ROOT}/sdk /vctoolsdir ${WINDOWS_SDK_ROOT}/crt)
-add_link_options(/manifest:no -libpath:${WINDOWS_SDK_ROOT}/sdk/lib/um/x64 -libpath:${WINDOWS_SDK_ROOT}/sdk/lib/ucrt/x64 -libpath:${WINDOWS_SDK_ROOT}/crt/lib/x64)
+add_link_options(/machine:x64 /manifest:no -libpath:${WINDOWS_SDK_ROOT}/sdk/lib/um/x64 -libpath:${WINDOWS_SDK_ROOT}/sdk/lib/ucrt/x64 -libpath:${WINDOWS_SDK_ROOT}/crt/lib/x64)

test/cpp/workspace/fuzzing/main.cpp

@@ -1,10 +1,11 @@
 #include <cstdint>
+#include <cstdlib>
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, std::size_t size)
 {
     if (size > 0 && data[0] == 'H')
         if (size > 1 && data[1] == 'I')
-            __builtin_trap();
+            abort();
 
     return 0;
 }