STRLCPY/criu

x86/xsave: Set only used XFEATURE_* in xstate_bv

Setting all supported by CPU features in xstate_bv may bring it into
dirty-upper-state as documented in specs, resulting in lower
performance. Let's not do this and set only those have been used by
dumpee.

P.S.
Off course it has to be a one-liner!

Fixes: #1171

Signed-off-by: Dmitry Safonov <[email protected]>
Signed-off-by: Alexander Mikhalitsyn <[email protected]>

Dmitry Safonov committed with Andrei Vagin 1 year ago

4930c980

1 parent 3f8e3220

Total 1 files

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criu/arch/x86/crtools.c

		skipped 432 lines
433	433		#define assign_array(dst, src, e) memcpy(dst.e, (src)->e, sizeof(dst.e))
434	434		#define assign_xsave(feature, xsave, member, area) \
435	435		do { \
436		-	if (compel_fpu_has_feature(feature)) { \
	436	+	if (compel_fpu_has_feature(feature) && (xsave->xstate_bv & (1UL << feature))) { \
437	437		uint32_t off = compel_fpu_feature_offset(feature); \
438	438		void *to = &area[off]; \
439	439		void *from = xsave->member; \
		skipped 211 lines