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a65329aa7d
A new self test that forces MSR[TS] to be set without calling any TM instruction. This test also tries to cause a page fault at a signal handler, exactly between MSR[TS] set and tm_recheckpoint(), forcing thread->texasr to be rewritten with TEXASR[FS] = 0, which will cause a BUG when tm_recheckpoint() is called. This test is not deterministic, since it is hard to guarantee that the page access will cause a page fault. In order to force more page faults at signal context, the signal handler and the ucontext are being mapped into a MADV_DONTNEED memory chunks. Tests have shown that the bug could be exposed with few interactions in a buggy kernel. This test is configured to loop 5000x, having a good chance to hit the kernel issue in just one run. This self test takes less than two seconds to run. This test uses set/getcontext because the kernel will recheckpoint zeroed structures, causing the test to segfault, which is undesired because the test needs to rerun, so, there is a signal handler for SIGSEGV which will restart the test. v2: Uses the MADV_DONTNEED memory advice v3: Fix memcpy and 32-bits compilation v4: Does not define unused macros Signed-off-by: Breno Leitao <leitao@debian.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
20 lines
310 B
Plaintext
20 lines
310 B
Plaintext
tm-resched-dscr
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tm-syscall
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tm-signal-msr-resv
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tm-signal-stack
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tm-vmxcopy
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tm-fork
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tm-tar
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tm-tmspr
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tm-exec
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tm-signal-context-chk-fpu
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tm-signal-context-chk-gpr
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tm-signal-context-chk-vmx
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tm-signal-context-chk-vsx
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tm-signal-context-force-tm
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tm-signal-sigreturn-nt
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tm-vmx-unavail
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tm-unavailable
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tm-trap
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tm-sigreturn
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