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We use dwarfsrcfiles in package.bbclass to list the source files used by a binary. This is done before they're stripped and linked to debug symbols in separate files. It is possible a binary may already have a link to separate debug symbols, e.g. some of the test binaries in lttng-tools ptest. In those cases, the linked binary may be changed by package.bbclass code whilst dwarfsrcfiles is reading it. That would result in a rare SIGBUS race causing the binary to fail. To avoid this, break the debug file search path so no other binaries are found. Also fix a segfault if no binary is specified while here. [YOCTO #14400] (From OE-Core rev: 317e334518c6394ecba4a3fdd4ba18b185822d22) Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org> (cherry picked from commit efef732859e265533acf16f2f4da3b29d50e0df4) Signed-off-by: Steve Sakoman <steve@sakoman.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>