[all-commits] [llvm/llvm-project] d31f8c: [AArch64] Avoid crashing on invalid -Wa, -march= va...
Dimitry Andric via All-commits
all-commits at lists.llvm.org
Wed Jan 5 10:22:24 PST 2022
Author: Dimitry Andric <dimitry at andric.com>
Date: 2022-01-05 (Wed, 05 Jan 2022)
[AArch64] Avoid crashing on invalid -Wa,-march= values
As reported in https://bugs.freebsd.org/260078, the gnutls Makefiles
pass -Wa,-march=all to compile a number of assembly files. Clang does
not support this -march value, but because of a mistake in handling
the arguments, an unitialized Arg pointer is dereferenced, which can
cause a segfault.
Work around this by adding a check if the local WaMArch variable is
initialized, and if so, using its value in the diagnostic message.
Reviewed By: tschuett
Differential Revision: https://reviews.llvm.org/D114677
(cherry picked from commit df08b2fe8b35cb63dfb3b49738a3494b9b4e6f8e)
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