These unittests are not running on windows because they are using incorrect commands.
They were not failing on 32-bits because there is a requirement: asan-64-bits.
$ "nm" "C:\src\llvm\ninja64\projects\compiler-rt\test\asan\X86_64WindowsConfig\TestCases\Output\no_asan_gen_globals.c.tmp.exe" # command stderr: 'nm': command not found error: command failed with exit status: 127
$ "rm" "-rf" "C:\src\llvm\ninja64\projects\compiler-rt\test\asan\X86_64WindowsConfig\TestCases\Output/coverage-tracing" $ "mkdir" "C:\src\llvm\ninja64\projects\compiler-rt\test\asan\X86_64WindowsConfig\TestCases\Output/coverage-tracing" $ "A=x" # command stderr: 'A=x': command not found error: command failed with exit status: 127
$ "DIR=C:\src\llvm\ninja64\projects\compiler-rt\test\asan\X86_64WindowsConfig\TestCases\Output/coverage-order-pcs" # command stderr: 'DIR=C:\\src\\llvm\\ninja64\\projects\\compiler-rt\\test\\asan\\X86_64WindowsConfig\\TestCases\\Output/coverage-order-pcs': command not found error: command failed with exit status: 127
IMO if it uses nm we should just send it to test/asan/TestCases/Posix