On 2023/08/15 0:23, Alex Bennée wrote:
Akihiko Odaki <akihiko.od...@daynix.com> writes:
This demonstrates how to write a plugin in C++.
Signed-off-by: Akihiko Odaki <akihiko.od...@daynix.com>
---
docs/devel/tcg-plugins.rst | 8 ++++++++
configure | 15 ++++++++++++---
contrib/plugins/Makefile | 5 +++++
contrib/plugins/cc.cc | 15 +++++++++++++++
tests/tcg/Makefile.target | 3 +++
5 files changed, 43 insertions(+), 3 deletions(-)
create mode 100644 contrib/plugins/cc.cc
diff --git a/docs/devel/tcg-plugins.rst b/docs/devel/tcg-plugins.rst
index c9f8b27590..0a11f8036c 100644
--- a/docs/devel/tcg-plugins.rst
+++ b/docs/devel/tcg-plugins.rst
@@ -584,6 +584,14 @@ The plugin has a number of arguments, all of them are
optional:
configuration arguments implies ``l2=on``.
(default: N = 2097152 (2MB), B = 64, A = 16)
+- contrib/plugins/cc.cc
+
+cc plugin demonstrates how to write a plugin in C++. It simply outputs
+"hello, world" to the plugin log::
+
+ $ qemu-system-arm $(QEMU_ARGS) \
+ -plugin ./contrib/plugins/libcc.so -d plugin
+
I'm going to assume this is useful because you have some out of tree C++
plugins? I'd drop the last two patches for now until there is a slightly
more compelling use case.
The out-of-tree plugin is mentioned in the cover letter and available at:
https://github.com/shioya-lab/sniper/tree/akihikodaki/bb/frontend/qemu-frontend
This plugin emits a trace of execution for use in Sniper simulator. I
believe it's useful for other people doing microarchitecture research
since processor simulation infrastructure is often written in C++.
The C++ compiler detection moved into meson in b485458e00 (configure,
meson: move C++ compiler detection to meson.build) so I don't think
there is currently a compelling reason to bring this back into
configure.
It is necessary because TCG tests use Makefile and config-host.mak is
emitted by configure. We can remove C++ detection from configure when
TCG tests or the config-host.mak generation migrate to Meson.
