[LSAN] Make sure HWASAN tests are linked with lld

[kstoimenov]

Fixed case.

[kstoimenov]

Update.

[vitalybuka]

compiler-rt/test/lsan/lit.common.cfg.py

102

Could you please add into comment why?
Something like "Without D65857, ld.bfd and ld.gold generate corrupted binary "

[kstoimenov]

Updated comment.

[kstoimenov]

Fixed case.

compiler-rt/test/lsan/lit.common.cfg.py

 elif lsan_lit_test_mode == "AddressSanitizer":
   config.name = "LeakSanitizer-AddressSanitizer"
   lsan_cflags = ["-fsanitize=address"]
   config.available_features.add('asan')
   if config.host_os == 'NetBSD':
     config.substitutions.insert(0, ('%run', config.netbsd_noaslr_prefix))
 elif lsan_lit_test_mode == "HWAddressSanitizer":
   config.name = "LeakSanitizer-HWAddressSanitizer"
-  lsan_cflags = ["-fsanitize=hwaddress"]
+  lsan_cflags = ["-fsanitize=hwaddress", "-fuse-ld=lld"]
   if target_arch == "x86_64":
     lsan_cflags = lsan_cflags + [ '-fsanitize-hwaddress-experimental-aliasing']
   config.available_features.add('hwasan')
   if config.host_os == 'NetBSD':
     config.substitutions.insert(0, ('%run', config.netbsd_noaslr_prefix))
 else:
   lit_config.fatal("Unknown LSan test mode: %r" % lsan_lit_test_mode)
 config.name += config.name_suffix

 supported_netbsd = config.host_os == 'NetBSD' and config.target_arch in ['x86_64', 'i386']
 if not (supported_android or supported_linux or supported_darwin or supported_netbsd):
   config.unsupported = True
 
 # Don't support Thumb due to broken fast unwinder
 if re.search('mthumb', config.target_cflags) is not None:
   config.unsupported = True
 
+# HWASAN tests require lld because without D65857, ld.bfd and ld.gold would
+# generate a corrupted binary. Mark them unsupported if lld is not available.
+if 'hwasan' in config.available_features and not config.has_lld:
+  config.unsupported = True
+
 config.suffixes = ['.c', '.cpp', '.mm']