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It helps ASAN to detect more leaks on coroutine stacks, and to get rid of some extra warnings. Before: tests/test-coroutine -p /basic/lifecycle /basic/lifecycle: ==20781==WARNING: ASan doesn't fully support makecontext/swapcontext functions and may produce false positives in some cases! ==20781==WARNING: ASan is ignoring requested __asan_handle_no_return: stack top: 0x7ffcb184d000; bottom 0x7ff6c4cfd000; size: 0x0005ecb50000 (25446121472) False positive error reports may follow For details see https://github.com/google/sanitizers/issues/189 OK After: tests/test-coroutine -p /basic/lifecycle /basic/lifecycle: ==21110==WARNING: ASan doesn't fully support makecontext/swapcontext functions and may produce false positives in some cases! OK A similar work would need to be done for sigaltstack & windows fibers to have similar coverage. Since ucontext is preferred, I didn't bother checking the other coroutine implementations for now. Update travis to fix the build with ASAN annotations. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20180116151152.4040-4-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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