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replay: do not build if TCG is not available

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this fixes non-TCG builds broken recently by replay reverse debugging.

Stub the needed functions in stub/, splitting roughly between functions
needed only by system emulation, by system emulation and tools,
and by everyone.  This includes duplicating some code in replay/, and
puts the logic for non-replay related events in the replay/ module (+
the stubs), so this should be revisited in the future.

Surprisingly, only _one_ qtest was affected by this, ide-test.c, which
resulted in a buzz as the bh events were never delivered, and the bh
never executed.

Many other subsystems _should_ have been affected.

This fixes the immediate issue, however a better way to group replay
functionality to TCG-only code could be developed in the long term.

Signed-off-by: Claudio Fontana <cfontana@suse.de>
Message-Id: <20201013192123.22632-4-cfontana@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Claudio Fontana 2020-10-13 21:21:23 +02:00 • committed by Paolo Bonzini
parent c51a5a23d8
commit 9b1c911654
10 changed files with 191 additions and 97 deletions
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4
stubs/meson.build
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@ -32,7 +32,6 @@ stub_ss.add(files('qtest.c'))
stub_ss.add(files('ram-block.c'))
stub_ss.add(files('ramfb.c'))
stub_ss.add(files('replay.c'))
stub_ss.add(files('replay-user.c'))
stub_ss.add(files('runstate-check.c'))
stub_ss.add(files('set-fd-handler.c'))
stub_ss.add(files('sysbus.c'))
@ -46,6 +45,9 @@ stub_ss.add(files('vmstate.c'))
stub_ss.add(files('vm-stop.c'))
stub_ss.add(files('win32-kbd-hook.c'))
stub_ss.add(files('cpu-synchronize-state.c'))
if have_block
stub_ss.add(files('replay-tools.c'))
endif
if have_system
stub_ss.add(files('semihost.c'))
stub_ss.add(files('xen-hw-stub.c'))