[compiler-rt] Add missing NO_EXEC_STACK_DIRECTIVE to tsan_rtl_s390x.S

[tbaeder]

Summary

The libclang_rt.tsan-s390x.so otherwise requires an executable stack.

[iii]

Thanks for catching this! LGTM.

[tbaeder]

Sorry, I'm not familiar enough with compiler-rt tests. Is the failing Linux/decorate_proc_maps test my fault?

[iii]

I don't think so. First of all, this is on another architecture; and then I tried running this test on both x86_64 and s390x with your change, and it succeeded in both cases for me.

Looking at the test, I don't see any good reason for it to exit without producing any output.
The only thing is that there is no error checking for pthread_create(), pthread_join(), open(), write() and close() - maybe the test hit some of the ulimits and one of these failed?

compiler-rt/lib/tsan/rtl/tsan_rtl_s390x.S

ASM_SYMBOL_INTERCEPTOR(\symbol):
   CFI_ENDPROC
   ASM_SIZE(ASM_SYMBOL_INTERCEPTOR(\symbol))
 .endm
 
 intercept setjmp, _ZN14__interception11real_setjmpE
 intercept _setjmp, _ZN14__interception12real__setjmpE
 intercept sigsetjmp, _ZN14__interception14real_sigsetjmpE
 intercept __sigsetjmp, _ZN14__interception16real___sigsetjmpE
+
+NO_EXEC_STACK_DIRECTIVE