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linux.sigcontext test fails when compiled for AVX due to VZEROUPPER #6953

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derekbruening opened this issue Aug 29, 2024 · 0 comments · Fixed by #6954
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linux.sigcontext test fails when compiled for AVX due to VZEROUPPER #6953

derekbruening opened this issue Aug 29, 2024 · 0 comments · Fixed by #6954
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Component-Tests OpSys-x86

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When compiled for AVX, the linux.sigcontext test has a VZEROUPPER inserted after it fills all the YMM registers and just before its call to kill() to send the signal. The signal handler then sees all the zero YMMH values and fails the test.
@derekbruening derekbruening self-assigned this Aug 29, 2024
derekbruening added a commit that referenced this issue Aug 30, 2024
@derekbruening
i#6953: Fix sigcontext test AVX error
ceb4a64 
Replaces a kill() with an inlined system call in the linux.sigcontext
test to avoid failure when compiled for AVX only, as the compiler
inserts VZEROUPPER there.

Tested on a toolchain targeting AVX.

Fixes #6953
@derekbruening derekbruening mentioned this issue Aug 30, 2024
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i#6953: Fix sigcontext test AVX error DynamoRIO/dynamorio
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