[asan][test] Fix build errors in loongarch64

[tangyouling]

Summary

• Add get_bits_for_arch for loongarch64 detection, fix the following error,

$ make check-asan
-- sanitizer_common tests on "Linux" will run against "asan"
CMake Error at test/asan/CMakeLists.txt:22 (message):
  Unknown target architecture: loongarch64
Call Stack (most recent call first):
  test/asan/CMakeLists.txt:49 (get_bits_for_arch)

• Do not use __builtin_longjmp, fix the following error,

llvm-project/compiler-rt/lib/asan/tests/asan_test.cpp:635:3: error: __builtin_longjmp is not supported for the current target
  __builtin_longjmp((void**)buf, 1);

[xry111]

LGTM.

[SixWeining]

LGTM.

[MaskRay]

[LoongArch][ASAN] Fix build errors in loongarch64 when testing asan

[ASAN] is uncommon. [asan] is. [test] is appropriate if this only touches tests. Personally I'd drop [LoongArch].

Add maintainers to the review list, not just a few who have previously reviewed LoongArch related patches.

[tangyouling]

In D137012#3894306, @MaskRay wrote:

[LoongArch][ASAN] Fix build errors in loongarch64 when testing asan

[ASAN] is uncommon. [asan] is. [test] is appropriate if this only touches tests. Personally I'd drop [LoongArch].

OK, revised.

Add maintainers to the review list, not just a few who have previously reviewed LoongArch related patches.

Thank you for the reminder.

compiler-rt/lib/asan/tests/asan_test.cpp

NOINLINE void SigLongJmpFunc1(sigjmp_buf buf) {
   int *A = Ident(&a);
   int *B = Ident(&b);
   *A = *B;
   siglongjmp(buf, 1);
 }
 
 #if !defined(__ANDROID__) && !defined(__arm__) && !defined(__aarch64__) && \
     !defined(__mips__) && !defined(__mips64) && !defined(__s390__) &&      \
-    !defined(__riscv)
+    !defined(__riscv) && !defined(__loongarch__)
 NOINLINE void BuiltinLongJmpFunc1(jmp_buf buf) {
   // create three red zones for these two stack objects.
   int a;
   int b;
 
   int *A = Ident(&a);
   int *B = Ident(&b);
   *A = *B;
   __builtin_longjmp((void**)buf, 1);
 }
 
 // Does not work on ARM:
 // https://github.com/google/sanitizers/issues/185
 TEST(AddressSanitizer, BuiltinLongJmpTest) {
   static jmp_buf buf;
   if (!__builtin_setjmp((void**)buf)) {
     BuiltinLongJmpFunc1(buf);
   } else {
     TouchStackFunc();
   }
 }
 #endif  // !defined(__ANDROID__) && !defined(__arm__) &&
-        // !defined(__aarch64__) && !defined(__mips__)
-        // !defined(__mips64) && !defined(__s390__)
-        // !defined(__riscv)
+        // !defined(__aarch64__) && !defined(__mips__) &&
+        // !defined(__mips64) && !defined(__s390__) &&
+        // !defined(__riscv) && !defined(__loongarch__)
 
 TEST(AddressSanitizer, UnderscopeLongJmpTest) {
   static jmp_buf buf;
   if (!_setjmp(buf)) {
     UnderscopeLongJmpFunc1(buf);
   } else {
     TouchStackFunc();
   }

compiler-rt/test/asan/CMakeLists.txt

 set(ASAN_LIT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
 
 set(ASAN_TESTSUITES)
 set(ASAN_DYNAMIC_TESTSUITES)
 
 # Before Windows 8 (CMAKE_SYSTEM_VERSION 6.2), reserving large regions of shadow
 # memory allocated physical memory for page tables, which made it very
 # unreliable. Remove the asan tests from check-all in this configuration.
 set(SHADOW_MAPPING_UNRELIABLE FALSE)
 if(OS_NAME MATCHES "Windows" AND CMAKE_SIZEOF_VOID_P EQUAL 8 AND
     CMAKE_SYSTEM_VERSION LESS 6.2)
   set(SHADOW_MAPPING_UNRELIABLE TRUE)
   message(WARNING "Disabling ASan tests because they are unreliable on Windows 7 and earlier")
 endif()
 
 macro(get_bits_for_arch arch bits)
-  if (${arch} MATCHES "x86_64|powerpc64|powerpc64le|aarch64|arm64|mips64|mips64el|s390x|sparcv9|riscv64")
+  if (${arch} MATCHES "x86_64|powerpc64|powerpc64le|aarch64|arm64|mips64|mips64el|s390x|sparcv9|riscv64|loongarch64")
     set(${bits} 64)
   elseif (${arch} MATCHES "i386|arm|mips|mipsel|sparc")
     set(${bits} 32)
   else()
     message(FATAL_ERROR "Unknown target architecture: ${arch}")
   endif()
 endmacro()