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[TSan] Fix static TLS boundaries calculations in __tls_get_addr interceptor.
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Authored by alekseyshl on Feb 14 2018, 4:29 PM.

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Summary

DTLS_on_tls_get_addr expects (tls_addr + tls_size) as the last
parameter, static_tls_end.

This revision is now accepted and ready to land.Feb 14 2018, 10:40 PM

This revision was automatically updated to reflect the committed changes.

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compiler-rt/

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lib/

tsan/

rtl/

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	// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58066			// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58066
	// So the interceptor must work with mis-aligned stack, in particular, does not			// So the interceptor must work with mis-aligned stack, in particular, does not
	// execute MOVDQA with stack addresses.			// execute MOVDQA with stack addresses.
	TSAN_INTERCEPTOR(void , __tls_get_addr, void arg) {			TSAN_INTERCEPTOR(void , __tls_get_addr, void arg) {
	void *res = REAL(__tls_get_addr)(arg);			void *res = REAL(__tls_get_addr)(arg);
	ThreadState *thr = cur_thread();			ThreadState *thr = cur_thread();
	if (!thr)			if (!thr)
	return res;			return res;
	DTLS::DTV *dtv = DTLS_on_tls_get_addr(arg, res, thr->tls_addr, thr->tls_size);			DTLS::DTV *dtv = DTLS_on_tls_get_addr(arg, res, thr->tls_addr,
				thr->tls_addr + thr->tls_size);
	if (!dtv)			if (!dtv)
	return res;			return res;
	// New DTLS block has been allocated.			// New DTLS block has been allocated.
	MemoryResetRange(thr, 0, dtv->beg, dtv->size);			MemoryResetRange(thr, 0, dtv->beg, dtv->size);
	return res;			return res;
	}			}
	#endif			#endif

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