Failure of test 'basic gdbstub support'

[Robert Henry]

The newish test 'basic gdbstub support' fails for me on an out-of-the-box  build on a host x86_64.  (See below for the config.log head.)

Is this failure expected?  If so, where can I see that in the various CI engines you have running them?

In digging through the test driver python code in tests/tcg/multiarch/gdbstub/sha1.py I see that the test assumes that a breakpoint on the function SHA1Init is a breakpoint at the 1st assignment statement; the 1st next executes the 1st assignment statement, etc.

This is a very fragile assumption.  It depends on the compiler used to compile sha1.c; it depends on the optimization level; it depends on the accuracy of the pc mapping in the debug info; it depends on gdb.

Better would be to change SHA1Init to do its work, and then call another non-inlined function taking a context pointer, and then examine context->state[0] and context->state[1].

Thanks in advance

TEST    basic gdbstub support

make[2]: *** [/mnt/robhenry/qemu_robhenry_amd64/qemu/tests/tcg/multiarch/Makefile.target:51: run-gdbstub-sha1] Error 2

 QEMU configure log Tue 09 Jun 2020 02:45:06 PM PDT

# Configured with: '../configure' '--disable-sdl' '--enable-gtk' '--extra-ldflags=-L/usr/lib' '--enable-plugins' '--target-list=x86_64-softmmu x86_64-linux-user'