[sanitizer] Add symbolizer support for loongarch64

[xry111]

Straightforward enough to me.

[xen0n]

compiler-rt/lib/sanitizer_common/sanitizer_common.h

712

Should use the proper casing LoongArch. See Hexagon below; our name is not an acronym so don't make it all-caps.

[tangyouling]

"LOONGARCH64" -> "LoongArch64"

compiler-rt/lib/asan/scripts/asan_symbolize.py

for path_to_cut in fix_filename_patterns:
       file_name = re.sub('.*' + path_to_cut, '', file_name)
   file_name = re.sub('.*asan_[a-z_]*.(cc|cpp):[0-9]*', '_asan_rtl_', file_name)
   file_name = re.sub('.*crtstuff.c:0', '???:0', file_name)
   return file_name
 
 def is_valid_arch(s):
   return s in ["i386", "x86_64", "x86_64h", "arm", "armv6", "armv7", "armv7s",
                "armv7k", "arm64", "powerpc64", "powerpc64le", "s390x", "s390",
-               "riscv64"]
+               "riscv64", "loongarch64"]
 
 def guess_arch(addr):
   # Guess which arch we're running. 10 = len('0x') + 8 hex digits.
   if len(addr) > 10:
     return 'x86_64'
   else:
     return 'i386'
 

compiler-rt/lib/sanitizer_common/sanitizer_common.h

enum ModuleArch {
   kModuleArchI386,
   kModuleArchX86_64,
   kModuleArchX86_64H,
   kModuleArchARMV6,
   kModuleArchARMV7,
   kModuleArchARMV7S,
   kModuleArchARMV7K,
   kModuleArchARM64,
+  kModuleArchLoongArch64,
   kModuleArchRISCV64,
   kModuleArchHexagon
 };
 
 // Sorts and removes duplicates from the container.
 template <class Container,
           class Compare = CompareLess<typename Container::value_type>>
 void SortAndDedup(Container &v, Compare comp = {}) {
switch (arch) {
     case kModuleArchARMV7:
       return "armv7";
     case kModuleArchARMV7S:
       return "armv7s";
     case kModuleArchARMV7K:
       return "armv7k";
     case kModuleArchARM64:
       return "arm64";
+    case kModuleArchLoongArch64:
+      return "loongarch64";
     case kModuleArchRISCV64:
       return "riscv64";
     case kModuleArchHexagon:
       return "hexagon";
   }
   CHECK(0 && "Invalid module arch");
   return "";
 }

compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_libcdep.cpp

private:
   void GetArgV(const char *path_to_binary,
                const char *(&argv)[kArgVMax]) const override {
 #if defined(__x86_64h__)
     const char* const kSymbolizerArch = "--default-arch=x86_64h";
 #elif defined(__x86_64__)
     const char* const kSymbolizerArch = "--default-arch=x86_64";
 #elif defined(__i386__)
     const char* const kSymbolizerArch = "--default-arch=i386";
+#elif SANITIZER_LOONGARCH64
+    const char *const kSymbolizerArch = "--default-arch=loongarch64";
 #elif SANITIZER_RISCV64
     const char *const kSymbolizerArch = "--default-arch=riscv64";
 #elif defined(__aarch64__)
     const char* const kSymbolizerArch = "--default-arch=arm64";
 #elif defined(__arm__)
     const char* const kSymbolizerArch = "--default-arch=arm";
 #elif defined(__powerpc64__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
     const char* const kSymbolizerArch = "--default-arch=powerpc64";